IEMAll.cpp@ 97156

Last change on this file since 97156 was 97156, checked in by vboxsync, 2 years ago
IEM: Quick fix to support PC/AT compatible math exception handling, analogous to what we do in HM. Required for DOS, OS/2, and other old guests.
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File size: 460.1 KB

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1	/* $Id: IEMAll.cpp 97156 2022-10-14 12:10:26Z vboxsync $ */
2	/** @file
3	* IEM - Interpreted Execution Manager - All Contexts.
4	*/
5
6	/*
7	* Copyright (C) 2011-2022 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28
29	/** @page pg_iem IEM - Interpreted Execution Manager
30	*
31	* The interpreted exeuction manager (IEM) is for executing short guest code
32	* sequences that are causing too many exits / virtualization traps. It will
33	* also be used to interpret single instructions, thus replacing the selective
34	* interpreters in EM and IOM.
35	*
36	* Design goals:
37	* - Relatively small footprint, although we favour speed and correctness
38	* over size.
39	* - Reasonably fast.
40	* - Correctly handle lock prefixed instructions.
41	* - Complete instruction set - eventually.
42	* - Refactorable into a recompiler, maybe.
43	* - Replace EMInterpret*.
44	*
45	* Using the existing disassembler has been considered, however this is thought
46	* to conflict with speed as the disassembler chews things a bit too much while
47	* leaving us with a somewhat complicated state to interpret afterwards.
48	*
49	*
50	* The current code is very much work in progress. You've been warned!
51	*
52	*
53	* @section sec_iem_fpu_instr FPU Instructions
54	*
55	* On x86 and AMD64 hosts, the FPU instructions are implemented by executing the
56	* same or equivalent instructions on the host FPU. To make life easy, we also
57	* let the FPU prioritize the unmasked exceptions for us. This however, only
58	* works reliably when CR0.NE is set, i.e. when using \#MF instead the IRQ 13
59	* for FPU exception delivery, because with CR0.NE=0 there is a window where we
60	* can trigger spurious FPU exceptions.
61	*
62	* The guest FPU state is not loaded into the host CPU and kept there till we
63	* leave IEM because the calling conventions have declared an all year open
64	* season on much of the FPU state. For instance an innocent looking call to
65	* memcpy might end up using a whole bunch of XMM or MM registers if the
66	* particular implementation finds it worthwhile.
67	*
68	*
69	* @section sec_iem_logging Logging
70	*
71	* The IEM code uses the \"IEM\" log group for the main logging. The different
72	* logging levels/flags are generally used for the following purposes:
73	* - Level 1 (Log) : Errors, exceptions, interrupts and such major events.
74	* - Flow (LogFlow) : Basic enter/exit IEM state info.
75	* - Level 2 (Log2) : ?
76	* - Level 3 (Log3) : More detailed enter/exit IEM state info.
77	* - Level 4 (Log4) : Decoding mnemonics w/ EIP.
78	* - Level 5 (Log5) : Decoding details.
79	* - Level 6 (Log6) : Enables/disables the lockstep comparison with REM.
80	* - Level 7 (Log7) : iret++ execution logging.
81	* - Level 8 (Log8) : Memory writes.
82	* - Level 9 (Log9) : Memory reads.
83	* - Level 10 (Log10): TLBs.
84	* - Level 11 (Log11): Unmasked FPU exceptions.
85	*
86	* The SVM (AMD-V) and VMX (VT-x) code has the following assignments:
87	* - Level 1 (Log) : Errors and other major events.
88	* - Flow (LogFlow) : Misc flow stuff (cleanup?)
89	* - Level 2 (Log2) : VM exits.
90	*/
91
92	/* Disabled warning C4505: 'iemRaisePageFaultJmp' : unreferenced local function has been removed */
93	#ifdef _MSC_VER
94	# pragma warning(disable:4505)
95	#endif
96
97
98	/*********************************************************************************************************************************
99	* Header Files *
100	*********************************************************************************************************************************/
101	#define LOG_GROUP LOG_GROUP_IEM
102	#define VMCPU_INCL_CPUM_GST_CTX
103	#include <VBox/vmm/iem.h>
104	#include <VBox/vmm/cpum.h>
105	#include <VBox/vmm/apic.h>
106	#include <VBox/vmm/pdm.h>
107	#include <VBox/vmm/pgm.h>
108	#include <VBox/vmm/iom.h>
109	#include <VBox/vmm/em.h>
110	#include <VBox/vmm/hm.h>
111	#include <VBox/vmm/nem.h>
112	#include <VBox/vmm/gim.h>
113	#ifdef VBOX_WITH_NESTED_HWVIRT_SVM
114	# include <VBox/vmm/em.h>
115	# include <VBox/vmm/hm_svm.h>
116	#endif
117	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX
118	# include <VBox/vmm/hmvmxinline.h>
119	#endif
120	#include <VBox/vmm/tm.h>
121	#include <VBox/vmm/dbgf.h>
122	#include <VBox/vmm/dbgftrace.h>
123	#include "IEMInternal.h"
124	#include <VBox/vmm/vmcc.h>
125	#include <VBox/log.h>
126	#include <VBox/err.h>
127	#include <VBox/param.h>
128	#include <VBox/dis.h>
129	#include <VBox/disopcode.h>
130	#include <iprt/asm-math.h>
131	#if defined(RT_ARCH_AMD64) \|\| defined(RT_ARCH_X86)
132	# include <iprt/asm-amd64-x86.h>
133	#elif defined(RT_ARCH_ARM64) \|\| defined(RT_ARCH_ARM32)
134	# include <iprt/asm-arm.h>
135	#endif
136	#include <iprt/assert.h>
137	#include <iprt/string.h>
138	#include <iprt/x86.h>
139
140	#include "IEMInline.h"
141
142
143	/*********************************************************************************************************************************
144	* Structures and Typedefs *
145	*********************************************************************************************************************************/
146	/**
147	* CPU exception classes.
148	*/
149	typedef enum IEMXCPTCLASS
150	{
151	IEMXCPTCLASS_BENIGN,
152	IEMXCPTCLASS_CONTRIBUTORY,
153	IEMXCPTCLASS_PAGE_FAULT,
154	IEMXCPTCLASS_DOUBLE_FAULT
155	} IEMXCPTCLASS;
156
157
158	/*********************************************************************************************************************************
159	* Global Variables *
160	*********************************************************************************************************************************/
161	#if defined(IEM_LOG_MEMORY_WRITES)
162	/** What IEM just wrote. */
163	uint8_t g_abIemWrote[256];
164	/** How much IEM just wrote. */
165	size_t g_cbIemWrote;
166	#endif
167
168
169	/*********************************************************************************************************************************
170	* Internal Functions *
171	*********************************************************************************************************************************/
172	static VBOXSTRICTRC iemMemFetchSelDescWithErr(PVMCPUCC pVCpu, PIEMSELDESC pDesc, uint16_t uSel,
173	uint8_t uXcpt, uint16_t uErrorCode) RT_NOEXCEPT;
174
175
176	/**
177	* Initializes the decoder state.
178	*
179	* iemReInitDecoder is mostly a copy of this function.
180	*
181	* @param pVCpu The cross context virtual CPU structure of the
182	* calling thread.
183	* @param fBypassHandlers Whether to bypass access handlers.
184	* @param fDisregardLock Whether to disregard the LOCK prefix.
185	*/
186	DECLINLINE(void) iemInitDecoder(PVMCPUCC pVCpu, bool fBypassHandlers, bool fDisregardLock)
187	{
188	IEM_CTX_ASSERT(pVCpu, IEM_CPUMCTX_EXTRN_MUST_MASK);
189	Assert(!VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_IEM));
190	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.cs));
191	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.ss));
192	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.es));
193	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.ds));
194	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.fs));
195	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.gs));
196	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.ldtr));
197	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.tr));
198
199	pVCpu->iem.s.uCpl = CPUMGetGuestCPL(pVCpu);
200	IEMMODE enmMode = iemCalcCpuMode(pVCpu);
201	pVCpu->iem.s.enmCpuMode = enmMode;
202	pVCpu->iem.s.enmDefAddrMode = enmMode; /** @todo check if this is correct... */
203	pVCpu->iem.s.enmEffAddrMode = enmMode;
204	if (enmMode != IEMMODE_64BIT)
205	{
206	pVCpu->iem.s.enmDefOpSize = enmMode; /** @todo check if this is correct... */
207	pVCpu->iem.s.enmEffOpSize = enmMode;
208	}
209	else
210	{
211	pVCpu->iem.s.enmDefOpSize = IEMMODE_32BIT;
212	pVCpu->iem.s.enmEffOpSize = IEMMODE_32BIT;
213	}
214	pVCpu->iem.s.fPrefixes = 0;
215	pVCpu->iem.s.uRexReg = 0;
216	pVCpu->iem.s.uRexB = 0;
217	pVCpu->iem.s.uRexIndex = 0;
218	pVCpu->iem.s.idxPrefix = 0;
219	pVCpu->iem.s.uVex3rdReg = 0;
220	pVCpu->iem.s.uVexLength = 0;
221	pVCpu->iem.s.fEvexStuff = 0;
222	pVCpu->iem.s.iEffSeg = X86_SREG_DS;
223	#ifdef IEM_WITH_CODE_TLB
224	pVCpu->iem.s.pbInstrBuf = NULL;
225	pVCpu->iem.s.offInstrNextByte = 0;
226	pVCpu->iem.s.offCurInstrStart = 0;
227	# ifdef VBOX_STRICT
228	pVCpu->iem.s.cbInstrBuf = UINT16_MAX;
229	pVCpu->iem.s.cbInstrBufTotal = UINT16_MAX;
230	pVCpu->iem.s.uInstrBufPc = UINT64_C(0xc0ffc0ffcff0c0ff);
231	# endif
232	#else
233	pVCpu->iem.s.offOpcode = 0;
234	pVCpu->iem.s.cbOpcode = 0;
235	#endif
236	pVCpu->iem.s.offModRm = 0;
237	pVCpu->iem.s.cActiveMappings = 0;
238	pVCpu->iem.s.iNextMapping = 0;
239	pVCpu->iem.s.rcPassUp = VINF_SUCCESS;
240	pVCpu->iem.s.fBypassHandlers = fBypassHandlers;
241	pVCpu->iem.s.fDisregardLock = fDisregardLock;
242
243	#ifdef DBGFTRACE_ENABLED
244	switch (enmMode)
245	{
246	case IEMMODE_64BIT:
247	RTTraceBufAddMsgF(pVCpu->CTX_SUFF(pVM)->CTX_SUFF(hTraceBuf), "I64/%u %08llx", pVCpu->iem.s.uCpl, pVCpu->cpum.GstCtx.rip);
248	break;
249	case IEMMODE_32BIT:
250	RTTraceBufAddMsgF(pVCpu->CTX_SUFF(pVM)->CTX_SUFF(hTraceBuf), "I32/%u %04x:%08x", pVCpu->iem.s.uCpl, pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.eip);
251	break;
252	case IEMMODE_16BIT:
253	RTTraceBufAddMsgF(pVCpu->CTX_SUFF(pVM)->CTX_SUFF(hTraceBuf), "I16/%u %04x:%04x", pVCpu->iem.s.uCpl, pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.eip);
254	break;
255	}
256	#endif
257	}
258
259
260	/**
261	* Reinitializes the decoder state 2nd+ loop of IEMExecLots.
262	*
263	* This is mostly a copy of iemInitDecoder.
264	*
265	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
266	*/
267	DECLINLINE(void) iemReInitDecoder(PVMCPUCC pVCpu)
268	{
269	Assert(!VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_IEM));
270	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.cs));
271	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.ss));
272	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.es));
273	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.ds));
274	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.fs));
275	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.gs));
276	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.ldtr));
277	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.tr));
278
279	pVCpu->iem.s.uCpl = CPUMGetGuestCPL(pVCpu); /** @todo this should be updated during execution! */
280	IEMMODE enmMode = iemCalcCpuMode(pVCpu);
281	pVCpu->iem.s.enmCpuMode = enmMode; /** @todo this should be updated during execution! */
282	pVCpu->iem.s.enmDefAddrMode = enmMode; /** @todo check if this is correct... */
283	pVCpu->iem.s.enmEffAddrMode = enmMode;
284	if (enmMode != IEMMODE_64BIT)
285	{
286	pVCpu->iem.s.enmDefOpSize = enmMode; /** @todo check if this is correct... */
287	pVCpu->iem.s.enmEffOpSize = enmMode;
288	}
289	else
290	{
291	pVCpu->iem.s.enmDefOpSize = IEMMODE_32BIT;
292	pVCpu->iem.s.enmEffOpSize = IEMMODE_32BIT;
293	}
294	pVCpu->iem.s.fPrefixes = 0;
295	pVCpu->iem.s.uRexReg = 0;
296	pVCpu->iem.s.uRexB = 0;
297	pVCpu->iem.s.uRexIndex = 0;
298	pVCpu->iem.s.idxPrefix = 0;
299	pVCpu->iem.s.uVex3rdReg = 0;
300	pVCpu->iem.s.uVexLength = 0;
301	pVCpu->iem.s.fEvexStuff = 0;
302	pVCpu->iem.s.iEffSeg = X86_SREG_DS;
303	#ifdef IEM_WITH_CODE_TLB
304	if (pVCpu->iem.s.pbInstrBuf)
305	{
306	uint64_t off = (pVCpu->iem.s.enmCpuMode == IEMMODE_64BIT ? pVCpu->cpum.GstCtx.rip : pVCpu->cpum.GstCtx.eip + (uint32_t)pVCpu->cpum.GstCtx.cs.u64Base)
307	- pVCpu->iem.s.uInstrBufPc;
308	if (off < pVCpu->iem.s.cbInstrBufTotal)
309	{
310	pVCpu->iem.s.offInstrNextByte = (uint32_t)off;
311	pVCpu->iem.s.offCurInstrStart = (uint16_t)off;
312	if ((uint16_t)off + 15 <= pVCpu->iem.s.cbInstrBufTotal)
313	pVCpu->iem.s.cbInstrBuf = (uint16_t)off + 15;
314	else
315	pVCpu->iem.s.cbInstrBuf = pVCpu->iem.s.cbInstrBufTotal;
316	}
317	else
318	{
319	pVCpu->iem.s.pbInstrBuf = NULL;
320	pVCpu->iem.s.offInstrNextByte = 0;
321	pVCpu->iem.s.offCurInstrStart = 0;
322	pVCpu->iem.s.cbInstrBuf = 0;
323	pVCpu->iem.s.cbInstrBufTotal = 0;
324	}
325	}
326	else
327	{
328	pVCpu->iem.s.offInstrNextByte = 0;
329	pVCpu->iem.s.offCurInstrStart = 0;
330	pVCpu->iem.s.cbInstrBuf = 0;
331	pVCpu->iem.s.cbInstrBufTotal = 0;
332	}
333	#else
334	pVCpu->iem.s.cbOpcode = 0;
335	pVCpu->iem.s.offOpcode = 0;
336	#endif
337	pVCpu->iem.s.offModRm = 0;
338	Assert(pVCpu->iem.s.cActiveMappings == 0);
339	pVCpu->iem.s.iNextMapping = 0;
340	Assert(pVCpu->iem.s.rcPassUp == VINF_SUCCESS);
341	Assert(pVCpu->iem.s.fBypassHandlers == false);
342
343	#ifdef DBGFTRACE_ENABLED
344	switch (enmMode)
345	{
346	case IEMMODE_64BIT:
347	RTTraceBufAddMsgF(pVCpu->CTX_SUFF(pVM)->CTX_SUFF(hTraceBuf), "I64/%u %08llx", pVCpu->iem.s.uCpl, pVCpu->cpum.GstCtx.rip);
348	break;
349	case IEMMODE_32BIT:
350	RTTraceBufAddMsgF(pVCpu->CTX_SUFF(pVM)->CTX_SUFF(hTraceBuf), "I32/%u %04x:%08x", pVCpu->iem.s.uCpl, pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.eip);
351	break;
352	case IEMMODE_16BIT:
353	RTTraceBufAddMsgF(pVCpu->CTX_SUFF(pVM)->CTX_SUFF(hTraceBuf), "I16/%u %04x:%04x", pVCpu->iem.s.uCpl, pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.eip);
354	break;
355	}
356	#endif
357	}
358
359
360
361	/**
362	* Prefetch opcodes the first time when starting executing.
363	*
364	* @returns Strict VBox status code.
365	* @param pVCpu The cross context virtual CPU structure of the
366	* calling thread.
367	* @param fBypassHandlers Whether to bypass access handlers.
368	* @param fDisregardLock Whether to disregard LOCK prefixes.
369	*
370	* @todo Combine fDisregardLock and fBypassHandlers into a flag parameter and
371	* store them as such.
372	*/
373	static VBOXSTRICTRC iemInitDecoderAndPrefetchOpcodes(PVMCPUCC pVCpu, bool fBypassHandlers, bool fDisregardLock) RT_NOEXCEPT
374	{
375	iemInitDecoder(pVCpu, fBypassHandlers, fDisregardLock);
376
377	#ifdef IEM_WITH_CODE_TLB
378	/** @todo Do ITLB lookup here. */
379
380	#else /* !IEM_WITH_CODE_TLB */
381
382	/*
383	* What we're doing here is very similar to iemMemMap/iemMemBounceBufferMap.
384	*
385	* First translate CS:rIP to a physical address.
386	*/
387	uint32_t cbToTryRead;
388	RTGCPTR GCPtrPC;
389	if (pVCpu->iem.s.enmCpuMode == IEMMODE_64BIT)
390	{
391	cbToTryRead = GUEST_PAGE_SIZE;
392	GCPtrPC = pVCpu->cpum.GstCtx.rip;
393	if (IEM_IS_CANONICAL(GCPtrPC))
394	cbToTryRead = GUEST_PAGE_SIZE - (GCPtrPC & GUEST_PAGE_OFFSET_MASK);
395	else
396	return iemRaiseGeneralProtectionFault0(pVCpu);
397	}
398	else
399	{
400	uint32_t GCPtrPC32 = pVCpu->cpum.GstCtx.eip;
401	AssertMsg(!(GCPtrPC32 & ~(uint32_t)UINT16_MAX) \|\| pVCpu->iem.s.enmCpuMode == IEMMODE_32BIT, ("%04x:%RX64\n", pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip));
402	if (GCPtrPC32 <= pVCpu->cpum.GstCtx.cs.u32Limit)
403	cbToTryRead = pVCpu->cpum.GstCtx.cs.u32Limit - GCPtrPC32 + 1;
404	else
405	return iemRaiseSelectorBounds(pVCpu, X86_SREG_CS, IEM_ACCESS_INSTRUCTION);
406	if (cbToTryRead) { /* likely */ }
407	else /* overflowed */
408	{
409	Assert(GCPtrPC32 == 0); Assert(pVCpu->cpum.GstCtx.cs.u32Limit == UINT32_MAX);
410	cbToTryRead = UINT32_MAX;
411	}
412	GCPtrPC = (uint32_t)pVCpu->cpum.GstCtx.cs.u64Base + GCPtrPC32;
413	Assert(GCPtrPC <= UINT32_MAX);
414	}
415
416	PGMPTWALK Walk;
417	int rc = PGMGstGetPage(pVCpu, GCPtrPC, &Walk);
418	if (RT_SUCCESS(rc))
419	Assert(Walk.fSucceeded); /* probable. */
420	else
421	{
422	Log(("iemInitDecoderAndPrefetchOpcodes: %RGv - rc=%Rrc\n", GCPtrPC, rc));
423	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
424	if (Walk.fFailed & PGM_WALKFAIL_EPT)
425	IEM_VMX_VMEXIT_EPT_RET(pVCpu, &Walk, IEM_ACCESS_INSTRUCTION, IEM_SLAT_FAIL_LINEAR_TO_PHYS_ADDR, 0 /* cbInstr */);
426	#endif
427	return iemRaisePageFault(pVCpu, GCPtrPC, IEM_ACCESS_INSTRUCTION, rc);
428	}
429	if ((Walk.fEffective & X86_PTE_US) \|\| pVCpu->iem.s.uCpl != 3) { /* likely */ }
430	else
431	{
432	Log(("iemInitDecoderAndPrefetchOpcodes: %RGv - supervisor page\n", GCPtrPC));
433	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
434	if (Walk.fFailed & PGM_WALKFAIL_EPT)
435	IEM_VMX_VMEXIT_EPT_RET(pVCpu, &Walk, IEM_ACCESS_INSTRUCTION, IEM_SLAT_FAIL_LINEAR_TO_PAGE_TABLE, 0 /* cbInstr */);
436	#endif
437	return iemRaisePageFault(pVCpu, GCPtrPC, IEM_ACCESS_INSTRUCTION, VERR_ACCESS_DENIED);
438	}
439	if (!(Walk.fEffective & X86_PTE_PAE_NX) \|\| !(pVCpu->cpum.GstCtx.msrEFER & MSR_K6_EFER_NXE)) { /* likely */ }
440	else
441	{
442	Log(("iemInitDecoderAndPrefetchOpcodes: %RGv - NX\n", GCPtrPC));
443	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
444	if (Walk.fFailed & PGM_WALKFAIL_EPT)
445	IEM_VMX_VMEXIT_EPT_RET(pVCpu, &Walk, IEM_ACCESS_INSTRUCTION, IEM_SLAT_FAIL_LINEAR_TO_PAGE_TABLE, 0 /* cbInstr */);
446	#endif
447	return iemRaisePageFault(pVCpu, GCPtrPC, IEM_ACCESS_INSTRUCTION, VERR_ACCESS_DENIED);
448	}
449	RTGCPHYS const GCPhys = Walk.GCPhys \| (GCPtrPC & GUEST_PAGE_OFFSET_MASK);
450	/** @todo Check reserved bits and such stuff. PGM is better at doing
451	* that, so do it when implementing the guest virtual address
452	* TLB... */
453
454	/*
455	* Read the bytes at this address.
456	*/
457	uint32_t cbLeftOnPage = GUEST_PAGE_SIZE - (GCPtrPC & GUEST_PAGE_OFFSET_MASK);
458	if (cbToTryRead > cbLeftOnPage)
459	cbToTryRead = cbLeftOnPage;
460	if (cbToTryRead > sizeof(pVCpu->iem.s.abOpcode))
461	cbToTryRead = sizeof(pVCpu->iem.s.abOpcode);
462
463	if (!pVCpu->iem.s.fBypassHandlers)
464	{
465	VBOXSTRICTRC rcStrict = PGMPhysRead(pVCpu->CTX_SUFF(pVM), GCPhys, pVCpu->iem.s.abOpcode, cbToTryRead, PGMACCESSORIGIN_IEM);
466	if (RT_LIKELY(rcStrict == VINF_SUCCESS))
467	{ /* likely */ }
468	else if (PGM_PHYS_RW_IS_SUCCESS(rcStrict))
469	{
470	Log(("iemInitDecoderAndPrefetchOpcodes: %RGv/%RGp LB %#x - read status - rcStrict=%Rrc\n",
471	GCPtrPC, GCPhys, VBOXSTRICTRC_VAL(rcStrict), cbToTryRead));
472	rcStrict = iemSetPassUpStatus(pVCpu, rcStrict);
473	}
474	else
475	{
476	Log((RT_SUCCESS(rcStrict)
477	? "iemInitDecoderAndPrefetchOpcodes: %RGv/%RGp LB %#x - read status - rcStrict=%Rrc\n"
478	: "iemInitDecoderAndPrefetchOpcodes: %RGv/%RGp LB %#x - read error - rcStrict=%Rrc (!!)\n",
479	GCPtrPC, GCPhys, VBOXSTRICTRC_VAL(rcStrict), cbToTryRead));
480	return rcStrict;
481	}
482	}
483	else
484	{
485	rc = PGMPhysSimpleReadGCPhys(pVCpu->CTX_SUFF(pVM), pVCpu->iem.s.abOpcode, GCPhys, cbToTryRead);
486	if (RT_SUCCESS(rc))
487	{ /* likely */ }
488	else
489	{
490	Log(("iemInitDecoderAndPrefetchOpcodes: %RGv/%RGp LB %#x - read error - rc=%Rrc (!!)\n",
491	GCPtrPC, GCPhys, rc, cbToTryRead));
492	return rc;
493	}
494	}
495	pVCpu->iem.s.cbOpcode = cbToTryRead;
496	#endif /* !IEM_WITH_CODE_TLB */
497	return VINF_SUCCESS;
498	}
499
500
501	/**
502	* Invalidates the IEM TLBs.
503	*
504	* This is called internally as well as by PGM when moving GC mappings.
505	*
506	* @returns
507	* @param pVCpu The cross context virtual CPU structure of the calling
508	* thread.
509	*/
510	VMM_INT_DECL(void) IEMTlbInvalidateAll(PVMCPUCC pVCpu)
511	{
512	#if defined(IEM_WITH_CODE_TLB) \|\| defined(IEM_WITH_DATA_TLB)
513	Log10(("IEMTlbInvalidateAll\n"));
514	# ifdef IEM_WITH_CODE_TLB
515	pVCpu->iem.s.cbInstrBufTotal = 0;
516	pVCpu->iem.s.CodeTlb.uTlbRevision += IEMTLB_REVISION_INCR;
517	if (pVCpu->iem.s.CodeTlb.uTlbRevision != 0)
518	{ /* very likely */ }
519	else
520	{
521	pVCpu->iem.s.CodeTlb.uTlbRevision = IEMTLB_REVISION_INCR;
522	unsigned i = RT_ELEMENTS(pVCpu->iem.s.CodeTlb.aEntries);
523	while (i-- > 0)
524	pVCpu->iem.s.CodeTlb.aEntries[i].uTag = 0;
525	}
526	# endif
527
528	# ifdef IEM_WITH_DATA_TLB
529	pVCpu->iem.s.DataTlb.uTlbRevision += IEMTLB_REVISION_INCR;
530	if (pVCpu->iem.s.DataTlb.uTlbRevision != 0)
531	{ /* very likely */ }
532	else
533	{
534	pVCpu->iem.s.DataTlb.uTlbRevision = IEMTLB_REVISION_INCR;
535	unsigned i = RT_ELEMENTS(pVCpu->iem.s.DataTlb.aEntries);
536	while (i-- > 0)
537	pVCpu->iem.s.DataTlb.aEntries[i].uTag = 0;
538	}
539	# endif
540	#else
541	RT_NOREF(pVCpu);
542	#endif
543	}
544
545
546	/**
547	* Invalidates a page in the TLBs.
548	*
549	* @param pVCpu The cross context virtual CPU structure of the calling
550	* thread.
551	* @param GCPtr The address of the page to invalidate
552	* @thread EMT(pVCpu)
553	*/
554	VMM_INT_DECL(void) IEMTlbInvalidatePage(PVMCPUCC pVCpu, RTGCPTR GCPtr)
555	{
556	#if defined(IEM_WITH_CODE_TLB) \|\| defined(IEM_WITH_DATA_TLB)
557	Log10(("IEMTlbInvalidatePage: GCPtr=%RGv\n", GCPtr));
558	GCPtr = IEMTLB_CALC_TAG_NO_REV(GCPtr);
559	Assert(!(GCPtr >> (48 - X86_PAGE_SHIFT)));
560	uintptr_t const idx = IEMTLB_TAG_TO_INDEX(GCPtr);
561
562	# ifdef IEM_WITH_CODE_TLB
563	if (pVCpu->iem.s.CodeTlb.aEntries[idx].uTag == (GCPtr \| pVCpu->iem.s.CodeTlb.uTlbRevision))
564	{
565	pVCpu->iem.s.CodeTlb.aEntries[idx].uTag = 0;
566	if (GCPtr == IEMTLB_CALC_TAG_NO_REV(pVCpu->iem.s.uInstrBufPc))
567	pVCpu->iem.s.cbInstrBufTotal = 0;
568	}
569	# endif
570
571	# ifdef IEM_WITH_DATA_TLB
572	if (pVCpu->iem.s.DataTlb.aEntries[idx].uTag == (GCPtr \| pVCpu->iem.s.DataTlb.uTlbRevision))
573	pVCpu->iem.s.DataTlb.aEntries[idx].uTag = 0;
574	# endif
575	#else
576	NOREF(pVCpu); NOREF(GCPtr);
577	#endif
578	}
579
580
581	#if defined(IEM_WITH_CODE_TLB) \|\| defined(IEM_WITH_DATA_TLB)
582	/**
583	* Invalid both TLBs slow fashion following a rollover.
584	*
585	* Worker for IEMTlbInvalidateAllPhysical,
586	* IEMTlbInvalidateAllPhysicalAllCpus, iemOpcodeFetchBytesJmp, iemMemMap,
587	* iemMemMapJmp and others.
588	*
589	* @thread EMT(pVCpu)
590	*/
591	static void IEMTlbInvalidateAllPhysicalSlow(PVMCPUCC pVCpu)
592	{
593	Log10(("IEMTlbInvalidateAllPhysicalSlow\n"));
594	ASMAtomicWriteU64(&pVCpu->iem.s.CodeTlb.uTlbPhysRev, IEMTLB_PHYS_REV_INCR * 2);
595	ASMAtomicWriteU64(&pVCpu->iem.s.DataTlb.uTlbPhysRev, IEMTLB_PHYS_REV_INCR * 2);
596
597	unsigned i;
598	# ifdef IEM_WITH_CODE_TLB
599	i = RT_ELEMENTS(pVCpu->iem.s.CodeTlb.aEntries);
600	while (i-- > 0)
601	{
602	pVCpu->iem.s.CodeTlb.aEntries[i].pbMappingR3 = NULL;
603	pVCpu->iem.s.CodeTlb.aEntries[i].fFlagsAndPhysRev &= ~( IEMTLBE_F_PG_NO_WRITE \| IEMTLBE_F_PG_NO_READ
604	\| IEMTLBE_F_PG_UNASSIGNED \| IEMTLBE_F_PHYS_REV);
605	}
606	# endif
607	# ifdef IEM_WITH_DATA_TLB
608	i = RT_ELEMENTS(pVCpu->iem.s.DataTlb.aEntries);
609	while (i-- > 0)
610	{
611	pVCpu->iem.s.DataTlb.aEntries[i].pbMappingR3 = NULL;
612	pVCpu->iem.s.DataTlb.aEntries[i].fFlagsAndPhysRev &= ~( IEMTLBE_F_PG_NO_WRITE \| IEMTLBE_F_PG_NO_READ
613	\| IEMTLBE_F_PG_UNASSIGNED \| IEMTLBE_F_PHYS_REV);
614	}
615	# endif
616
617	}
618	#endif
619
620
621	/**
622	* Invalidates the host physical aspects of the IEM TLBs.
623	*
624	* This is called internally as well as by PGM when moving GC mappings.
625	*
626	* @param pVCpu The cross context virtual CPU structure of the calling
627	* thread.
628	* @note Currently not used.
629	*/
630	VMM_INT_DECL(void) IEMTlbInvalidateAllPhysical(PVMCPUCC pVCpu)
631	{
632	#if defined(IEM_WITH_CODE_TLB) \|\| defined(IEM_WITH_DATA_TLB)
633	/* Note! This probably won't end up looking exactly like this, but it give an idea... */
634	Log10(("IEMTlbInvalidateAllPhysical\n"));
635
636	# ifdef IEM_WITH_CODE_TLB
637	pVCpu->iem.s.cbInstrBufTotal = 0;
638	# endif
639	uint64_t uTlbPhysRev = pVCpu->iem.s.CodeTlb.uTlbPhysRev + IEMTLB_PHYS_REV_INCR;
640	if (RT_LIKELY(uTlbPhysRev > IEMTLB_PHYS_REV_INCR * 2))
641	{
642	pVCpu->iem.s.CodeTlb.uTlbPhysRev = uTlbPhysRev;
643	pVCpu->iem.s.DataTlb.uTlbPhysRev = uTlbPhysRev;
644	}
645	else
646	IEMTlbInvalidateAllPhysicalSlow(pVCpu);
647	#else
648	NOREF(pVCpu);
649	#endif
650	}
651
652
653	/**
654	* Invalidates the host physical aspects of the IEM TLBs.
655	*
656	* This is called internally as well as by PGM when moving GC mappings.
657	*
658	* @param pVM The cross context VM structure.
659	* @param idCpuCaller The ID of the calling EMT if available to the caller,
660	* otherwise NIL_VMCPUID.
661	*
662	* @remarks Caller holds the PGM lock.
663	*/
664	VMM_INT_DECL(void) IEMTlbInvalidateAllPhysicalAllCpus(PVMCC pVM, VMCPUID idCpuCaller)
665	{
666	#if defined(IEM_WITH_CODE_TLB) \|\| defined(IEM_WITH_DATA_TLB)
667	PVMCPUCC const pVCpuCaller = idCpuCaller >= pVM->cCpus ? VMMGetCpu(pVM) : VMMGetCpuById(pVM, idCpuCaller);
668	if (pVCpuCaller)
669	VMCPU_ASSERT_EMT(pVCpuCaller);
670	Log10(("IEMTlbInvalidateAllPhysicalAllCpus\n"));
671
672	VMCC_FOR_EACH_VMCPU(pVM)
673	{
674	# ifdef IEM_WITH_CODE_TLB
675	if (pVCpuCaller == pVCpu)
676	pVCpu->iem.s.cbInstrBufTotal = 0;
677	# endif
678
679	uint64_t const uTlbPhysRevPrev = ASMAtomicUoReadU64(&pVCpu->iem.s.CodeTlb.uTlbPhysRev);
680	uint64_t uTlbPhysRevNew = uTlbPhysRevPrev + IEMTLB_PHYS_REV_INCR;
681	if (RT_LIKELY(uTlbPhysRevNew > IEMTLB_PHYS_REV_INCR * 2))
682	{ /* likely */}
683	else if (pVCpuCaller == pVCpu)
684	uTlbPhysRevNew = IEMTLB_PHYS_REV_INCR;
685	else
686	{
687	IEMTlbInvalidateAllPhysicalSlow(pVCpu);
688	continue;
689	}
690	ASMAtomicCmpXchgU64(&pVCpu->iem.s.CodeTlb.uTlbPhysRev, uTlbPhysRevNew, uTlbPhysRevPrev);
691	ASMAtomicCmpXchgU64(&pVCpu->iem.s.DataTlb.uTlbPhysRev, uTlbPhysRevNew, uTlbPhysRevPrev);
692	}
693	VMCC_FOR_EACH_VMCPU_END(pVM);
694
695	#else
696	RT_NOREF(pVM, idCpuCaller);
697	#endif
698	}
699
700	#ifdef IEM_WITH_CODE_TLB
701
702	/**
703	* Tries to fetches @a cbDst opcode bytes, raise the appropriate exception on
704	* failure and jumps.
705	*
706	* We end up here for a number of reasons:
707	* - pbInstrBuf isn't yet initialized.
708	* - Advancing beyond the buffer boundrary (e.g. cross page).
709	* - Advancing beyond the CS segment limit.
710	* - Fetching from non-mappable page (e.g. MMIO).
711	*
712	* @param pVCpu The cross context virtual CPU structure of the
713	* calling thread.
714	* @param pvDst Where to return the bytes.
715	* @param cbDst Number of bytes to read.
716	*
717	* @todo Make cbDst = 0 a way of initializing pbInstrBuf?
718	*/
719	void iemOpcodeFetchBytesJmp(PVMCPUCC pVCpu, size_t cbDst, void *pvDst) RT_NOEXCEPT
720	{
721	#ifdef IN_RING3
722	for (;;)
723	{
724	Assert(cbDst <= 8);
725	uint32_t offBuf = pVCpu->iem.s.offInstrNextByte;
726
727	/*
728	* We might have a partial buffer match, deal with that first to make the
729	* rest simpler. This is the first part of the cross page/buffer case.
730	*/
731	if (pVCpu->iem.s.pbInstrBuf != NULL)
732	{
733	if (offBuf < pVCpu->iem.s.cbInstrBuf)
734	{
735	Assert(offBuf + cbDst > pVCpu->iem.s.cbInstrBuf);
736	uint32_t const cbCopy = pVCpu->iem.s.cbInstrBuf - pVCpu->iem.s.offInstrNextByte;
737	memcpy(pvDst, &pVCpu->iem.s.pbInstrBuf[offBuf], cbCopy);
738
739	cbDst -= cbCopy;
740	pvDst = (uint8_t *)pvDst + cbCopy;
741	offBuf += cbCopy;
742	pVCpu->iem.s.offInstrNextByte += offBuf;
743	}
744	}
745
746	/*
747	* Check segment limit, figuring how much we're allowed to access at this point.
748	*
749	* We will fault immediately if RIP is past the segment limit / in non-canonical
750	* territory. If we do continue, there are one or more bytes to read before we
751	* end up in trouble and we need to do that first before faulting.
752	*/
753	RTGCPTR GCPtrFirst;
754	uint32_t cbMaxRead;
755	if (pVCpu->iem.s.enmCpuMode == IEMMODE_64BIT)
756	{
757	GCPtrFirst = pVCpu->cpum.GstCtx.rip + (offBuf - (uint32_t)(int32_t)pVCpu->iem.s.offCurInstrStart);
758	if (RT_LIKELY(IEM_IS_CANONICAL(GCPtrFirst)))
759	{ /* likely */ }
760	else
761	iemRaiseGeneralProtectionFault0Jmp(pVCpu);
762	cbMaxRead = X86_PAGE_SIZE - ((uint32_t)GCPtrFirst & X86_PAGE_OFFSET_MASK);
763	}
764	else
765	{
766	GCPtrFirst = pVCpu->cpum.GstCtx.eip + (offBuf - (uint32_t)(int32_t)pVCpu->iem.s.offCurInstrStart);
767	Assert(!(GCPtrFirst & ~(uint32_t)UINT16_MAX) \|\| pVCpu->iem.s.enmCpuMode == IEMMODE_32BIT);
768	if (RT_LIKELY((uint32_t)GCPtrFirst <= pVCpu->cpum.GstCtx.cs.u32Limit))
769	{ /* likely */ }
770	else
771	iemRaiseSelectorBoundsJmp(pVCpu, X86_SREG_CS, IEM_ACCESS_INSTRUCTION);
772	cbMaxRead = pVCpu->cpum.GstCtx.cs.u32Limit - (uint32_t)GCPtrFirst + 1;
773	if (cbMaxRead != 0)
774	{ /* likely */ }
775	else
776	{
777	/* Overflowed because address is 0 and limit is max. */
778	Assert(GCPtrFirst == 0); Assert(pVCpu->cpum.GstCtx.cs.u32Limit == UINT32_MAX);
779	cbMaxRead = X86_PAGE_SIZE;
780	}
781	GCPtrFirst = (uint32_t)GCPtrFirst + (uint32_t)pVCpu->cpum.GstCtx.cs.u64Base;
782	uint32_t cbMaxRead2 = X86_PAGE_SIZE - ((uint32_t)GCPtrFirst & X86_PAGE_OFFSET_MASK);
783	if (cbMaxRead2 < cbMaxRead)
784	cbMaxRead = cbMaxRead2;
785	/** @todo testcase: unreal modes, both huge 16-bit and 32-bit. */
786	}
787
788	/*
789	* Get the TLB entry for this piece of code.
790	*/
791	uint64_t const uTag = IEMTLB_CALC_TAG( &pVCpu->iem.s.CodeTlb, GCPtrFirst);
792	PIEMTLBENTRY const pTlbe = IEMTLB_TAG_TO_ENTRY(&pVCpu->iem.s.CodeTlb, uTag);
793	if (pTlbe->uTag == uTag)
794	{
795	/* likely when executing lots of code, otherwise unlikely */
796	# ifdef VBOX_WITH_STATISTICS
797	pVCpu->iem.s.CodeTlb.cTlbHits++;
798	# endif
799	}
800	else
801	{
802	pVCpu->iem.s.CodeTlb.cTlbMisses++;
803	PGMPTWALK Walk;
804	int rc = PGMGstGetPage(pVCpu, GCPtrFirst, &Walk);
805	if (RT_FAILURE(rc))
806	{
807	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
808	/** @todo Nested VMX: Need to handle EPT violation/misconfig here? */
809	Assert(!(Walk.fFailed & PGM_WALKFAIL_EPT));
810	#endif
811	Log(("iemOpcodeFetchMoreBytes: %RGv - rc=%Rrc\n", GCPtrFirst, rc));
812	iemRaisePageFaultJmp(pVCpu, GCPtrFirst, IEM_ACCESS_INSTRUCTION, rc);
813	}
814
815	AssertCompile(IEMTLBE_F_PT_NO_EXEC == 1);
816	Assert(Walk.fSucceeded);
817	pTlbe->uTag = uTag;
818	pTlbe->fFlagsAndPhysRev = (~Walk.fEffective & (X86_PTE_US \| X86_PTE_RW \| X86_PTE_D \| X86_PTE_A))
819	\| (Walk.fEffective >> X86_PTE_PAE_BIT_NX);
820	pTlbe->GCPhys = Walk.GCPhys;
821	pTlbe->pbMappingR3 = NULL;
822	}
823
824	/*
825	* Check TLB page table level access flags.
826	*/
827	if (pTlbe->fFlagsAndPhysRev & (IEMTLBE_F_PT_NO_USER \| IEMTLBE_F_PT_NO_EXEC))
828	{
829	if ((pTlbe->fFlagsAndPhysRev & IEMTLBE_F_PT_NO_USER) && pVCpu->iem.s.uCpl == 3)
830	{
831	Log(("iemOpcodeFetchBytesJmp: %RGv - supervisor page\n", GCPtrFirst));
832	iemRaisePageFaultJmp(pVCpu, GCPtrFirst, IEM_ACCESS_INSTRUCTION, VERR_ACCESS_DENIED);
833	}
834	if ((pTlbe->fFlagsAndPhysRev & IEMTLBE_F_PT_NO_EXEC) && (pVCpu->cpum.GstCtx.msrEFER & MSR_K6_EFER_NXE))
835	{
836	Log(("iemOpcodeFetchMoreBytes: %RGv - NX\n", GCPtrFirst));
837	iemRaisePageFaultJmp(pVCpu, GCPtrFirst, IEM_ACCESS_INSTRUCTION, VERR_ACCESS_DENIED);
838	}
839	}
840
841	/*
842	* Look up the physical page info if necessary.
843	*/
844	if ((pTlbe->fFlagsAndPhysRev & IEMTLBE_F_PHYS_REV) == pVCpu->iem.s.CodeTlb.uTlbPhysRev)
845	{ /* not necessary */ }
846	else
847	{
848	AssertCompile(PGMIEMGCPHYS2PTR_F_NO_WRITE == IEMTLBE_F_PG_NO_WRITE);
849	AssertCompile(PGMIEMGCPHYS2PTR_F_NO_READ == IEMTLBE_F_PG_NO_READ);
850	AssertCompile(PGMIEMGCPHYS2PTR_F_NO_MAPPINGR3 == IEMTLBE_F_NO_MAPPINGR3);
851	AssertCompile(PGMIEMGCPHYS2PTR_F_UNASSIGNED == IEMTLBE_F_PG_UNASSIGNED);
852	if (RT_LIKELY(pVCpu->iem.s.CodeTlb.uTlbPhysRev > IEMTLB_PHYS_REV_INCR))
853	{ /* likely */ }
854	else
855	IEMTlbInvalidateAllPhysicalSlow(pVCpu);
856	pTlbe->fFlagsAndPhysRev &= ~( IEMTLBE_F_PHYS_REV
857	\| IEMTLBE_F_NO_MAPPINGR3 \| IEMTLBE_F_PG_NO_READ \| IEMTLBE_F_PG_NO_WRITE \| IEMTLBE_F_PG_UNASSIGNED);
858	int rc = PGMPhysIemGCPhys2PtrNoLock(pVCpu->CTX_SUFF(pVM), pVCpu, pTlbe->GCPhys, &pVCpu->iem.s.CodeTlb.uTlbPhysRev,
859	&pTlbe->pbMappingR3, &pTlbe->fFlagsAndPhysRev);
860	AssertRCStmt(rc, longjmp(*CTX_SUFF(pVCpu->iem.s.pJmpBuf), rc));
861	}
862
863	# if defined(IN_RING3) \|\| defined(IN_RING0) /** @todo fixme */
864	/*
865	* Try do a direct read using the pbMappingR3 pointer.
866	*/
867	if ( (pTlbe->fFlagsAndPhysRev & (IEMTLBE_F_PHYS_REV \| IEMTLBE_F_NO_MAPPINGR3 \| IEMTLBE_F_PG_NO_READ))
868	== pVCpu->iem.s.CodeTlb.uTlbPhysRev)
869	{
870	uint32_t const offPg = (GCPtrFirst & X86_PAGE_OFFSET_MASK);
871	pVCpu->iem.s.cbInstrBufTotal = offPg + cbMaxRead;
872	if (offBuf == (uint32_t)(int32_t)pVCpu->iem.s.offCurInstrStart)
873	{
874	pVCpu->iem.s.cbInstrBuf = offPg + RT_MIN(15, cbMaxRead);
875	pVCpu->iem.s.offCurInstrStart = (int16_t)offPg;
876	}
877	else
878	{
879	uint32_t const cbInstr = offBuf - (uint32_t)(int32_t)pVCpu->iem.s.offCurInstrStart;
880	Assert(cbInstr < cbMaxRead);
881	pVCpu->iem.s.cbInstrBuf = offPg + RT_MIN(cbMaxRead + cbInstr, 15) - cbInstr;
882	pVCpu->iem.s.offCurInstrStart = (int16_t)(offPg - cbInstr);
883	}
884	if (cbDst <= cbMaxRead)
885	{
886	pVCpu->iem.s.offInstrNextByte = offPg + (uint32_t)cbDst;
887	pVCpu->iem.s.uInstrBufPc = GCPtrFirst & ~(RTGCPTR)X86_PAGE_OFFSET_MASK;
888	pVCpu->iem.s.pbInstrBuf = pTlbe->pbMappingR3;
889	memcpy(pvDst, &pTlbe->pbMappingR3[offPg], cbDst);
890	return;
891	}
892	pVCpu->iem.s.pbInstrBuf = NULL;
893
894	memcpy(pvDst, &pTlbe->pbMappingR3[offPg], cbMaxRead);
895	pVCpu->iem.s.offInstrNextByte = offPg + cbMaxRead;
896	}
897	else
898	# endif
899	#if 0
900	/*
901	* If there is no special read handling, so we can read a bit more and
902	* put it in the prefetch buffer.
903	*/
904	if ( cbDst < cbMaxRead
905	&& (pTlbe->fFlagsAndPhysRev & (IEMTLBE_F_PHYS_REV \| IEMTLBE_F_PG_NO_READ)) == pVCpu->iem.s.CodeTlb.uTlbPhysRev)
906	{
907	VBOXSTRICTRC rcStrict = PGMPhysRead(pVCpu->CTX_SUFF(pVM), pTlbe->GCPhys,
908	&pVCpu->iem.s.abOpcode[0], cbToTryRead, PGMACCESSORIGIN_IEM);
909	if (RT_LIKELY(rcStrict == VINF_SUCCESS))
910	{ /* likely */ }
911	else if (PGM_PHYS_RW_IS_SUCCESS(rcStrict))
912	{
913	Log(("iemOpcodeFetchMoreBytes: %RGv/%RGp LB %#x - read status - rcStrict=%Rrc\n",
914	GCPtrNext, GCPhys, VBOXSTRICTRC_VAL(rcStrict), cbToTryRead));
915	rcStrict = iemSetPassUpStatus(pVCpu, rcStrict);
916	AssertStmt(rcStrict == VINF_SUCCESS, longjmp(*CTX_SUFF(pVCpu->iem.s.pJmpBuf), VBOXSTRICRC_VAL(rcStrict)));
917	}
918	else
919	{
920	Log((RT_SUCCESS(rcStrict)
921	? "iemOpcodeFetchMoreBytes: %RGv/%RGp LB %#x - read status - rcStrict=%Rrc\n"
922	: "iemOpcodeFetchMoreBytes: %RGv/%RGp LB %#x - read error - rcStrict=%Rrc (!!)\n",
923	GCPtrNext, GCPhys, VBOXSTRICTRC_VAL(rcStrict), cbToTryRead));
924	longjmp(*CTX_SUFF(pVCpu->iem.s.pJmpBuf), VBOXSTRICTRC_VAL(rcStrict));
925	}
926	}
927	/*
928	* Special read handling, so only read exactly what's needed.
929	* This is a highly unlikely scenario.
930	*/
931	else
932	#endif
933	{
934	pVCpu->iem.s.CodeTlb.cTlbSlowReadPath++;
935	uint32_t const cbToRead = RT_MIN((uint32_t)cbDst, cbMaxRead);
936	VBOXSTRICTRC rcStrict = PGMPhysRead(pVCpu->CTX_SUFF(pVM), pTlbe->GCPhys + (GCPtrFirst & X86_PAGE_OFFSET_MASK),
937	pvDst, cbToRead, PGMACCESSORIGIN_IEM);
938	if (RT_LIKELY(rcStrict == VINF_SUCCESS))
939	{ /* likely */ }
940	else if (PGM_PHYS_RW_IS_SUCCESS(rcStrict))
941	{
942	Log(("iemOpcodeFetchMoreBytes: %RGv/%RGp LB %#x - read status - rcStrict=%Rrc\n",
943	GCPtrFirst, pTlbe->GCPhys + (GCPtrFirst & X86_PAGE_OFFSET_MASK), VBOXSTRICTRC_VAL(rcStrict), cbToRead));
944	rcStrict = iemSetPassUpStatus(pVCpu, rcStrict);
945	AssertStmt(rcStrict == VINF_SUCCESS, longjmp(*CTX_SUFF(pVCpu->iem.s.pJmpBuf), VBOXSTRICTRC_VAL(rcStrict)));
946	}
947	else
948	{
949	Log((RT_SUCCESS(rcStrict)
950	? "iemOpcodeFetchMoreBytes: %RGv/%RGp LB %#x - read status - rcStrict=%Rrc\n"
951	: "iemOpcodeFetchMoreBytes: %RGv/%RGp LB %#x - read error - rcStrict=%Rrc (!!)\n",
952	GCPtrFirst, pTlbe->GCPhys + (GCPtrFirst & X86_PAGE_OFFSET_MASK), VBOXSTRICTRC_VAL(rcStrict), cbToRead));
953	longjmp(*CTX_SUFF(pVCpu->iem.s.pJmpBuf), VBOXSTRICTRC_VAL(rcStrict));
954	}
955	pVCpu->iem.s.offInstrNextByte = offBuf + cbToRead;
956	if (cbToRead == cbDst)
957	return;
958	}
959
960	/*
961	* More to read, loop.
962	*/
963	cbDst -= cbMaxRead;
964	pvDst = (uint8_t *)pvDst + cbMaxRead;
965	}
966	#else
967	RT_NOREF(pvDst, cbDst);
968	longjmp(*CTX_SUFF(pVCpu->iem.s.pJmpBuf), VERR_INTERNAL_ERROR);
969	#endif
970	}
971
972	#else
973
974	/**
975	* Try fetch at least @a cbMin bytes more opcodes, raise the appropriate
976	* exception if it fails.
977	*
978	* @returns Strict VBox status code.
979	* @param pVCpu The cross context virtual CPU structure of the
980	* calling thread.
981	* @param cbMin The minimum number of bytes relative offOpcode
982	* that must be read.
983	*/
984	VBOXSTRICTRC iemOpcodeFetchMoreBytes(PVMCPUCC pVCpu, size_t cbMin) RT_NOEXCEPT
985	{
986	/*
987	* What we're doing here is very similar to iemMemMap/iemMemBounceBufferMap.
988	*
989	* First translate CS:rIP to a physical address.
990	*/
991	uint8_t cbLeft = pVCpu->iem.s.cbOpcode - pVCpu->iem.s.offOpcode; Assert(cbLeft < cbMin);
992	uint32_t cbToTryRead;
993	RTGCPTR GCPtrNext;
994	if (pVCpu->iem.s.enmCpuMode == IEMMODE_64BIT)
995	{
996	cbToTryRead = GUEST_PAGE_SIZE;
997	GCPtrNext = pVCpu->cpum.GstCtx.rip + pVCpu->iem.s.cbOpcode;
998	if (!IEM_IS_CANONICAL(GCPtrNext))
999	return iemRaiseGeneralProtectionFault0(pVCpu);
1000	}
1001	else
1002	{
1003	uint32_t GCPtrNext32 = pVCpu->cpum.GstCtx.eip;
1004	Assert(!(GCPtrNext32 & ~(uint32_t)UINT16_MAX) \|\| pVCpu->iem.s.enmCpuMode == IEMMODE_32BIT);
1005	GCPtrNext32 += pVCpu->iem.s.cbOpcode;
1006	if (GCPtrNext32 > pVCpu->cpum.GstCtx.cs.u32Limit)
1007	return iemRaiseSelectorBounds(pVCpu, X86_SREG_CS, IEM_ACCESS_INSTRUCTION);
1008	cbToTryRead = pVCpu->cpum.GstCtx.cs.u32Limit - GCPtrNext32 + 1;
1009	if (!cbToTryRead) /* overflowed */
1010	{
1011	Assert(GCPtrNext32 == 0); Assert(pVCpu->cpum.GstCtx.cs.u32Limit == UINT32_MAX);
1012	cbToTryRead = UINT32_MAX;
1013	/** @todo check out wrapping around the code segment. */
1014	}
1015	if (cbToTryRead < cbMin - cbLeft)
1016	return iemRaiseSelectorBounds(pVCpu, X86_SREG_CS, IEM_ACCESS_INSTRUCTION);
1017	GCPtrNext = (uint32_t)pVCpu->cpum.GstCtx.cs.u64Base + GCPtrNext32;
1018	}
1019
1020	/* Only read up to the end of the page, and make sure we don't read more
1021	than the opcode buffer can hold. */
1022	uint32_t cbLeftOnPage = GUEST_PAGE_SIZE - (GCPtrNext & GUEST_PAGE_OFFSET_MASK);
1023	if (cbToTryRead > cbLeftOnPage)
1024	cbToTryRead = cbLeftOnPage;
1025	if (cbToTryRead > sizeof(pVCpu->iem.s.abOpcode) - pVCpu->iem.s.cbOpcode)
1026	cbToTryRead = sizeof(pVCpu->iem.s.abOpcode) - pVCpu->iem.s.cbOpcode;
1027	/** @todo r=bird: Convert assertion into undefined opcode exception? */
1028	Assert(cbToTryRead >= cbMin - cbLeft); /* ASSUMPTION based on iemInitDecoderAndPrefetchOpcodes. */
1029
1030	PGMPTWALK Walk;
1031	int rc = PGMGstGetPage(pVCpu, GCPtrNext, &Walk);
1032	if (RT_FAILURE(rc))
1033	{
1034	Log(("iemOpcodeFetchMoreBytes: %RGv - rc=%Rrc\n", GCPtrNext, rc));
1035	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
1036	if (Walk.fFailed & PGM_WALKFAIL_EPT)
1037	IEM_VMX_VMEXIT_EPT_RET(pVCpu, &Walk, IEM_ACCESS_INSTRUCTION, IEM_SLAT_FAIL_LINEAR_TO_PHYS_ADDR, 0 /* cbInstr */);
1038	#endif
1039	return iemRaisePageFault(pVCpu, GCPtrNext, IEM_ACCESS_INSTRUCTION, rc);
1040	}
1041	if (!(Walk.fEffective & X86_PTE_US) && pVCpu->iem.s.uCpl == 3)
1042	{
1043	Log(("iemOpcodeFetchMoreBytes: %RGv - supervisor page\n", GCPtrNext));
1044	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
1045	if (Walk.fFailed & PGM_WALKFAIL_EPT)
1046	IEM_VMX_VMEXIT_EPT_RET(pVCpu, &Walk, IEM_ACCESS_INSTRUCTION, IEM_SLAT_FAIL_LINEAR_TO_PAGE_TABLE, 0 /* cbInstr */);
1047	#endif
1048	return iemRaisePageFault(pVCpu, GCPtrNext, IEM_ACCESS_INSTRUCTION, VERR_ACCESS_DENIED);
1049	}
1050	if ((Walk.fEffective & X86_PTE_PAE_NX) && (pVCpu->cpum.GstCtx.msrEFER & MSR_K6_EFER_NXE))
1051	{
1052	Log(("iemOpcodeFetchMoreBytes: %RGv - NX\n", GCPtrNext));
1053	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
1054	if (Walk.fFailed & PGM_WALKFAIL_EPT)
1055	IEM_VMX_VMEXIT_EPT_RET(pVCpu, &Walk, IEM_ACCESS_INSTRUCTION, IEM_SLAT_FAIL_LINEAR_TO_PAGE_TABLE, 0 /* cbInstr */);
1056	#endif
1057	return iemRaisePageFault(pVCpu, GCPtrNext, IEM_ACCESS_INSTRUCTION, VERR_ACCESS_DENIED);
1058	}
1059	RTGCPHYS const GCPhys = Walk.GCPhys \| (GCPtrNext & GUEST_PAGE_OFFSET_MASK);
1060	Log5(("GCPtrNext=%RGv GCPhys=%RGp cbOpcodes=%#x\n", GCPtrNext, GCPhys, pVCpu->iem.s.cbOpcode));
1061	/** @todo Check reserved bits and such stuff. PGM is better at doing
1062	* that, so do it when implementing the guest virtual address
1063	* TLB... */
1064
1065	/*
1066	* Read the bytes at this address.
1067	*
1068	* We read all unpatched bytes in iemInitDecoderAndPrefetchOpcodes already,
1069	* and since PATM should only patch the start of an instruction there
1070	* should be no need to check again here.
1071	*/
1072	if (!pVCpu->iem.s.fBypassHandlers)
1073	{
1074	VBOXSTRICTRC rcStrict = PGMPhysRead(pVCpu->CTX_SUFF(pVM), GCPhys, &pVCpu->iem.s.abOpcode[pVCpu->iem.s.cbOpcode],
1075	cbToTryRead, PGMACCESSORIGIN_IEM);
1076	if (RT_LIKELY(rcStrict == VINF_SUCCESS))
1077	{ /* likely */ }
1078	else if (PGM_PHYS_RW_IS_SUCCESS(rcStrict))
1079	{
1080	Log(("iemOpcodeFetchMoreBytes: %RGv/%RGp LB %#x - read status - rcStrict=%Rrc\n",
1081	GCPtrNext, GCPhys, VBOXSTRICTRC_VAL(rcStrict), cbToTryRead));
1082	rcStrict = iemSetPassUpStatus(pVCpu, rcStrict);
1083	}
1084	else
1085	{
1086	Log((RT_SUCCESS(rcStrict)
1087	? "iemOpcodeFetchMoreBytes: %RGv/%RGp LB %#x - read status - rcStrict=%Rrc\n"
1088	: "iemOpcodeFetchMoreBytes: %RGv/%RGp LB %#x - read error - rcStrict=%Rrc (!!)\n",
1089	GCPtrNext, GCPhys, VBOXSTRICTRC_VAL(rcStrict), cbToTryRead));
1090	return rcStrict;
1091	}
1092	}
1093	else
1094	{
1095	rc = PGMPhysSimpleReadGCPhys(pVCpu->CTX_SUFF(pVM), &pVCpu->iem.s.abOpcode[pVCpu->iem.s.cbOpcode], GCPhys, cbToTryRead);
1096	if (RT_SUCCESS(rc))
1097	{ /* likely */ }
1098	else
1099	{
1100	Log(("iemOpcodeFetchMoreBytes: %RGv - read error - rc=%Rrc (!!)\n", GCPtrNext, rc));
1101	return rc;
1102	}
1103	}
1104	pVCpu->iem.s.cbOpcode += cbToTryRead;
1105	Log5(("%.*Rhxs\n", pVCpu->iem.s.cbOpcode, pVCpu->iem.s.abOpcode));
1106
1107	return VINF_SUCCESS;
1108	}
1109
1110	#endif /* !IEM_WITH_CODE_TLB */
1111	#ifndef IEM_WITH_SETJMP
1112
1113	/**
1114	* Deals with the problematic cases that iemOpcodeGetNextU8 doesn't like.
1115	*
1116	* @returns Strict VBox status code.
1117	* @param pVCpu The cross context virtual CPU structure of the
1118	* calling thread.
1119	* @param pb Where to return the opcode byte.
1120	*/
1121	VBOXSTRICTRC iemOpcodeGetNextU8Slow(PVMCPUCC pVCpu, uint8_t *pb) RT_NOEXCEPT
1122	{
1123	VBOXSTRICTRC rcStrict = iemOpcodeFetchMoreBytes(pVCpu, 1);
1124	if (rcStrict == VINF_SUCCESS)
1125	{
1126	uint8_t offOpcode = pVCpu->iem.s.offOpcode;
1127	*pb = pVCpu->iem.s.abOpcode[offOpcode];
1128	pVCpu->iem.s.offOpcode = offOpcode + 1;
1129	}
1130	else
1131	*pb = 0;
1132	return rcStrict;
1133	}
1134
1135	#else /* IEM_WITH_SETJMP */
1136
1137	/**
1138	* Deals with the problematic cases that iemOpcodeGetNextU8Jmp doesn't like, longjmp on error.
1139	*
1140	* @returns The opcode byte.
1141	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1142	*/
1143	uint8_t iemOpcodeGetNextU8SlowJmp(PVMCPUCC pVCpu) RT_NOEXCEPT
1144	{
1145	# ifdef IEM_WITH_CODE_TLB
1146	uint8_t u8;
1147	iemOpcodeFetchBytesJmp(pVCpu, sizeof(u8), &u8);
1148	return u8;
1149	# else
1150	VBOXSTRICTRC rcStrict = iemOpcodeFetchMoreBytes(pVCpu, 1);
1151	if (rcStrict == VINF_SUCCESS)
1152	return pVCpu->iem.s.abOpcode[pVCpu->iem.s.offOpcode++];
1153	longjmp(*pVCpu->iem.s.CTX_SUFF(pJmpBuf), VBOXSTRICTRC_VAL(rcStrict));
1154	# endif
1155	}
1156
1157	#endif /* IEM_WITH_SETJMP */
1158
1159	#ifndef IEM_WITH_SETJMP
1160
1161	/**
1162	* Deals with the problematic cases that iemOpcodeGetNextS8SxU16 doesn't like.
1163	*
1164	* @returns Strict VBox status code.
1165	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1166	* @param pu16 Where to return the opcode dword.
1167	*/
1168	VBOXSTRICTRC iemOpcodeGetNextS8SxU16Slow(PVMCPUCC pVCpu, uint16_t *pu16) RT_NOEXCEPT
1169	{
1170	uint8_t u8;
1171	VBOXSTRICTRC rcStrict = iemOpcodeGetNextU8Slow(pVCpu, &u8);
1172	if (rcStrict == VINF_SUCCESS)
1173	*pu16 = (int8_t)u8;
1174	return rcStrict;
1175	}
1176
1177
1178	/**
1179	* Deals with the problematic cases that iemOpcodeGetNextS8SxU32 doesn't like.
1180	*
1181	* @returns Strict VBox status code.
1182	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1183	* @param pu32 Where to return the opcode dword.
1184	*/
1185	VBOXSTRICTRC iemOpcodeGetNextS8SxU32Slow(PVMCPUCC pVCpu, uint32_t *pu32) RT_NOEXCEPT
1186	{
1187	uint8_t u8;
1188	VBOXSTRICTRC rcStrict = iemOpcodeGetNextU8Slow(pVCpu, &u8);
1189	if (rcStrict == VINF_SUCCESS)
1190	*pu32 = (int8_t)u8;
1191	return rcStrict;
1192	}
1193
1194
1195	/**
1196	* Deals with the problematic cases that iemOpcodeGetNextS8SxU64 doesn't like.
1197	*
1198	* @returns Strict VBox status code.
1199	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1200	* @param pu64 Where to return the opcode qword.
1201	*/
1202	VBOXSTRICTRC iemOpcodeGetNextS8SxU64Slow(PVMCPUCC pVCpu, uint64_t *pu64) RT_NOEXCEPT
1203	{
1204	uint8_t u8;
1205	VBOXSTRICTRC rcStrict = iemOpcodeGetNextU8Slow(pVCpu, &u8);
1206	if (rcStrict == VINF_SUCCESS)
1207	*pu64 = (int8_t)u8;
1208	return rcStrict;
1209	}
1210
1211	#endif /* !IEM_WITH_SETJMP */
1212
1213
1214	#ifndef IEM_WITH_SETJMP
1215
1216	/**
1217	* Deals with the problematic cases that iemOpcodeGetNextU16 doesn't like.
1218	*
1219	* @returns Strict VBox status code.
1220	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1221	* @param pu16 Where to return the opcode word.
1222	*/
1223	VBOXSTRICTRC iemOpcodeGetNextU16Slow(PVMCPUCC pVCpu, uint16_t *pu16) RT_NOEXCEPT
1224	{
1225	VBOXSTRICTRC rcStrict = iemOpcodeFetchMoreBytes(pVCpu, 2);
1226	if (rcStrict == VINF_SUCCESS)
1227	{
1228	uint8_t offOpcode = pVCpu->iem.s.offOpcode;
1229	# ifdef IEM_USE_UNALIGNED_DATA_ACCESS
1230	pu16 = (uint16_t const *)&pVCpu->iem.s.abOpcode[offOpcode];
1231	# else
1232	*pu16 = RT_MAKE_U16(pVCpu->iem.s.abOpcode[offOpcode], pVCpu->iem.s.abOpcode[offOpcode + 1]);
1233	# endif
1234	pVCpu->iem.s.offOpcode = offOpcode + 2;
1235	}
1236	else
1237	*pu16 = 0;
1238	return rcStrict;
1239	}
1240
1241	#else /* IEM_WITH_SETJMP */
1242
1243	/**
1244	* Deals with the problematic cases that iemOpcodeGetNextU16Jmp doesn't like, longjmp on error
1245	*
1246	* @returns The opcode word.
1247	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1248	*/
1249	uint16_t iemOpcodeGetNextU16SlowJmp(PVMCPUCC pVCpu) RT_NOEXCEPT
1250	{
1251	# ifdef IEM_WITH_CODE_TLB
1252	uint16_t u16;
1253	iemOpcodeFetchBytesJmp(pVCpu, sizeof(u16), &u16);
1254	return u16;
1255	# else
1256	VBOXSTRICTRC rcStrict = iemOpcodeFetchMoreBytes(pVCpu, 2);
1257	if (rcStrict == VINF_SUCCESS)
1258	{
1259	uint8_t offOpcode = pVCpu->iem.s.offOpcode;
1260	pVCpu->iem.s.offOpcode += 2;
1261	# ifdef IEM_USE_UNALIGNED_DATA_ACCESS
1262	return (uint16_t const )&pVCpu->iem.s.abOpcode[offOpcode];
1263	# else
1264	return RT_MAKE_U16(pVCpu->iem.s.abOpcode[offOpcode], pVCpu->iem.s.abOpcode[offOpcode + 1]);
1265	# endif
1266	}
1267	longjmp(*pVCpu->iem.s.CTX_SUFF(pJmpBuf), VBOXSTRICTRC_VAL(rcStrict));
1268	# endif
1269	}
1270
1271	#endif /* IEM_WITH_SETJMP */
1272
1273	#ifndef IEM_WITH_SETJMP
1274
1275	/**
1276	* Deals with the problematic cases that iemOpcodeGetNextU16ZxU32 doesn't like.
1277	*
1278	* @returns Strict VBox status code.
1279	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1280	* @param pu32 Where to return the opcode double word.
1281	*/
1282	VBOXSTRICTRC iemOpcodeGetNextU16ZxU32Slow(PVMCPUCC pVCpu, uint32_t *pu32) RT_NOEXCEPT
1283	{
1284	VBOXSTRICTRC rcStrict = iemOpcodeFetchMoreBytes(pVCpu, 2);
1285	if (rcStrict == VINF_SUCCESS)
1286	{
1287	uint8_t offOpcode = pVCpu->iem.s.offOpcode;
1288	*pu32 = RT_MAKE_U16(pVCpu->iem.s.abOpcode[offOpcode], pVCpu->iem.s.abOpcode[offOpcode + 1]);
1289	pVCpu->iem.s.offOpcode = offOpcode + 2;
1290	}
1291	else
1292	*pu32 = 0;
1293	return rcStrict;
1294	}
1295
1296
1297	/**
1298	* Deals with the problematic cases that iemOpcodeGetNextU16ZxU64 doesn't like.
1299	*
1300	* @returns Strict VBox status code.
1301	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1302	* @param pu64 Where to return the opcode quad word.
1303	*/
1304	VBOXSTRICTRC iemOpcodeGetNextU16ZxU64Slow(PVMCPUCC pVCpu, uint64_t *pu64) RT_NOEXCEPT
1305	{
1306	VBOXSTRICTRC rcStrict = iemOpcodeFetchMoreBytes(pVCpu, 2);
1307	if (rcStrict == VINF_SUCCESS)
1308	{
1309	uint8_t offOpcode = pVCpu->iem.s.offOpcode;
1310	*pu64 = RT_MAKE_U16(pVCpu->iem.s.abOpcode[offOpcode], pVCpu->iem.s.abOpcode[offOpcode + 1]);
1311	pVCpu->iem.s.offOpcode = offOpcode + 2;
1312	}
1313	else
1314	*pu64 = 0;
1315	return rcStrict;
1316	}
1317
1318	#endif /* !IEM_WITH_SETJMP */
1319
1320	#ifndef IEM_WITH_SETJMP
1321
1322	/**
1323	* Deals with the problematic cases that iemOpcodeGetNextU32 doesn't like.
1324	*
1325	* @returns Strict VBox status code.
1326	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1327	* @param pu32 Where to return the opcode dword.
1328	*/
1329	VBOXSTRICTRC iemOpcodeGetNextU32Slow(PVMCPUCC pVCpu, uint32_t *pu32) RT_NOEXCEPT
1330	{
1331	VBOXSTRICTRC rcStrict = iemOpcodeFetchMoreBytes(pVCpu, 4);
1332	if (rcStrict == VINF_SUCCESS)
1333	{
1334	uint8_t offOpcode = pVCpu->iem.s.offOpcode;
1335	# ifdef IEM_USE_UNALIGNED_DATA_ACCESS
1336	pu32 = (uint32_t const *)&pVCpu->iem.s.abOpcode[offOpcode];
1337	# else
1338	*pu32 = RT_MAKE_U32_FROM_U8(pVCpu->iem.s.abOpcode[offOpcode],
1339	pVCpu->iem.s.abOpcode[offOpcode + 1],
1340	pVCpu->iem.s.abOpcode[offOpcode + 2],
1341	pVCpu->iem.s.abOpcode[offOpcode + 3]);
1342	# endif
1343	pVCpu->iem.s.offOpcode = offOpcode + 4;
1344	}
1345	else
1346	*pu32 = 0;
1347	return rcStrict;
1348	}
1349
1350	#else /* IEM_WITH_SETJMP */
1351
1352	/**
1353	* Deals with the problematic cases that iemOpcodeGetNextU32Jmp doesn't like, longjmp on error.
1354	*
1355	* @returns The opcode dword.
1356	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1357	*/
1358	uint32_t iemOpcodeGetNextU32SlowJmp(PVMCPUCC pVCpu) RT_NOEXCEPT
1359	{
1360	# ifdef IEM_WITH_CODE_TLB
1361	uint32_t u32;
1362	iemOpcodeFetchBytesJmp(pVCpu, sizeof(u32), &u32);
1363	return u32;
1364	# else
1365	VBOXSTRICTRC rcStrict = iemOpcodeFetchMoreBytes(pVCpu, 4);
1366	if (rcStrict == VINF_SUCCESS)
1367	{
1368	uint8_t offOpcode = pVCpu->iem.s.offOpcode;
1369	pVCpu->iem.s.offOpcode = offOpcode + 4;
1370	# ifdef IEM_USE_UNALIGNED_DATA_ACCESS
1371	return (uint32_t const )&pVCpu->iem.s.abOpcode[offOpcode];
1372	# else
1373	return RT_MAKE_U32_FROM_U8(pVCpu->iem.s.abOpcode[offOpcode],
1374	pVCpu->iem.s.abOpcode[offOpcode + 1],
1375	pVCpu->iem.s.abOpcode[offOpcode + 2],
1376	pVCpu->iem.s.abOpcode[offOpcode + 3]);
1377	# endif
1378	}
1379	longjmp(*pVCpu->iem.s.CTX_SUFF(pJmpBuf), VBOXSTRICTRC_VAL(rcStrict));
1380	# endif
1381	}
1382
1383	#endif /* IEM_WITH_SETJMP */
1384
1385	#ifndef IEM_WITH_SETJMP
1386
1387	/**
1388	* Deals with the problematic cases that iemOpcodeGetNextU32ZxU64 doesn't like.
1389	*
1390	* @returns Strict VBox status code.
1391	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1392	* @param pu64 Where to return the opcode dword.
1393	*/
1394	VBOXSTRICTRC iemOpcodeGetNextU32ZxU64Slow(PVMCPUCC pVCpu, uint64_t *pu64) RT_NOEXCEPT
1395	{
1396	VBOXSTRICTRC rcStrict = iemOpcodeFetchMoreBytes(pVCpu, 4);
1397	if (rcStrict == VINF_SUCCESS)
1398	{
1399	uint8_t offOpcode = pVCpu->iem.s.offOpcode;
1400	*pu64 = RT_MAKE_U32_FROM_U8(pVCpu->iem.s.abOpcode[offOpcode],
1401	pVCpu->iem.s.abOpcode[offOpcode + 1],
1402	pVCpu->iem.s.abOpcode[offOpcode + 2],
1403	pVCpu->iem.s.abOpcode[offOpcode + 3]);
1404	pVCpu->iem.s.offOpcode = offOpcode + 4;
1405	}
1406	else
1407	*pu64 = 0;
1408	return rcStrict;
1409	}
1410
1411
1412	/**
1413	* Deals with the problematic cases that iemOpcodeGetNextS32SxU64 doesn't like.
1414	*
1415	* @returns Strict VBox status code.
1416	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1417	* @param pu64 Where to return the opcode qword.
1418	*/
1419	VBOXSTRICTRC iemOpcodeGetNextS32SxU64Slow(PVMCPUCC pVCpu, uint64_t *pu64) RT_NOEXCEPT
1420	{
1421	VBOXSTRICTRC rcStrict = iemOpcodeFetchMoreBytes(pVCpu, 4);
1422	if (rcStrict == VINF_SUCCESS)
1423	{
1424	uint8_t offOpcode = pVCpu->iem.s.offOpcode;
1425	*pu64 = (int32_t)RT_MAKE_U32_FROM_U8(pVCpu->iem.s.abOpcode[offOpcode],
1426	pVCpu->iem.s.abOpcode[offOpcode + 1],
1427	pVCpu->iem.s.abOpcode[offOpcode + 2],
1428	pVCpu->iem.s.abOpcode[offOpcode + 3]);
1429	pVCpu->iem.s.offOpcode = offOpcode + 4;
1430	}
1431	else
1432	*pu64 = 0;
1433	return rcStrict;
1434	}
1435
1436	#endif /* !IEM_WITH_SETJMP */
1437
1438	#ifndef IEM_WITH_SETJMP
1439
1440	/**
1441	* Deals with the problematic cases that iemOpcodeGetNextU64 doesn't like.
1442	*
1443	* @returns Strict VBox status code.
1444	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1445	* @param pu64 Where to return the opcode qword.
1446	*/
1447	VBOXSTRICTRC iemOpcodeGetNextU64Slow(PVMCPUCC pVCpu, uint64_t *pu64) RT_NOEXCEPT
1448	{
1449	VBOXSTRICTRC rcStrict = iemOpcodeFetchMoreBytes(pVCpu, 8);
1450	if (rcStrict == VINF_SUCCESS)
1451	{
1452	uint8_t offOpcode = pVCpu->iem.s.offOpcode;
1453	# ifdef IEM_USE_UNALIGNED_DATA_ACCESS
1454	pu64 = (uint64_t const *)&pVCpu->iem.s.abOpcode[offOpcode];
1455	# else
1456	*pu64 = RT_MAKE_U64_FROM_U8(pVCpu->iem.s.abOpcode[offOpcode],
1457	pVCpu->iem.s.abOpcode[offOpcode + 1],
1458	pVCpu->iem.s.abOpcode[offOpcode + 2],
1459	pVCpu->iem.s.abOpcode[offOpcode + 3],
1460	pVCpu->iem.s.abOpcode[offOpcode + 4],
1461	pVCpu->iem.s.abOpcode[offOpcode + 5],
1462	pVCpu->iem.s.abOpcode[offOpcode + 6],
1463	pVCpu->iem.s.abOpcode[offOpcode + 7]);
1464	# endif
1465	pVCpu->iem.s.offOpcode = offOpcode + 8;
1466	}
1467	else
1468	*pu64 = 0;
1469	return rcStrict;
1470	}
1471
1472	#else /* IEM_WITH_SETJMP */
1473
1474	/**
1475	* Deals with the problematic cases that iemOpcodeGetNextU64Jmp doesn't like, longjmp on error.
1476	*
1477	* @returns The opcode qword.
1478	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1479	*/
1480	uint64_t iemOpcodeGetNextU64SlowJmp(PVMCPUCC pVCpu) RT_NOEXCEPT
1481	{
1482	# ifdef IEM_WITH_CODE_TLB
1483	uint64_t u64;
1484	iemOpcodeFetchBytesJmp(pVCpu, sizeof(u64), &u64);
1485	return u64;
1486	# else
1487	VBOXSTRICTRC rcStrict = iemOpcodeFetchMoreBytes(pVCpu, 8);
1488	if (rcStrict == VINF_SUCCESS)
1489	{
1490	uint8_t offOpcode = pVCpu->iem.s.offOpcode;
1491	pVCpu->iem.s.offOpcode = offOpcode + 8;
1492	# ifdef IEM_USE_UNALIGNED_DATA_ACCESS
1493	return (uint64_t const )&pVCpu->iem.s.abOpcode[offOpcode];
1494	# else
1495	return RT_MAKE_U64_FROM_U8(pVCpu->iem.s.abOpcode[offOpcode],
1496	pVCpu->iem.s.abOpcode[offOpcode + 1],
1497	pVCpu->iem.s.abOpcode[offOpcode + 2],
1498	pVCpu->iem.s.abOpcode[offOpcode + 3],
1499	pVCpu->iem.s.abOpcode[offOpcode + 4],
1500	pVCpu->iem.s.abOpcode[offOpcode + 5],
1501	pVCpu->iem.s.abOpcode[offOpcode + 6],
1502	pVCpu->iem.s.abOpcode[offOpcode + 7]);
1503	# endif
1504	}
1505	longjmp(*pVCpu->iem.s.CTX_SUFF(pJmpBuf), VBOXSTRICTRC_VAL(rcStrict));
1506	# endif
1507	}
1508
1509	#endif /* IEM_WITH_SETJMP */
1510
1511
1512
1513	/** @name Misc Worker Functions.
1514	* @{
1515	*/
1516
1517	/**
1518	* Gets the exception class for the specified exception vector.
1519	*
1520	* @returns The class of the specified exception.
1521	* @param uVector The exception vector.
1522	*/
1523	static IEMXCPTCLASS iemGetXcptClass(uint8_t uVector) RT_NOEXCEPT
1524	{
1525	Assert(uVector <= X86_XCPT_LAST);
1526	switch (uVector)
1527	{
1528	case X86_XCPT_DE:
1529	case X86_XCPT_TS:
1530	case X86_XCPT_NP:
1531	case X86_XCPT_SS:
1532	case X86_XCPT_GP:
1533	case X86_XCPT_SX: /* AMD only */
1534	return IEMXCPTCLASS_CONTRIBUTORY;
1535
1536	case X86_XCPT_PF:
1537	case X86_XCPT_VE: /* Intel only */
1538	return IEMXCPTCLASS_PAGE_FAULT;
1539
1540	case X86_XCPT_DF:
1541	return IEMXCPTCLASS_DOUBLE_FAULT;
1542	}
1543	return IEMXCPTCLASS_BENIGN;
1544	}
1545
1546
1547	/**
1548	* Evaluates how to handle an exception caused during delivery of another event
1549	* (exception / interrupt).
1550	*
1551	* @returns How to handle the recursive exception.
1552	* @param pVCpu The cross context virtual CPU structure of the
1553	* calling thread.
1554	* @param fPrevFlags The flags of the previous event.
1555	* @param uPrevVector The vector of the previous event.
1556	* @param fCurFlags The flags of the current exception.
1557	* @param uCurVector The vector of the current exception.
1558	* @param pfXcptRaiseInfo Where to store additional information about the
1559	* exception condition. Optional.
1560	*/
1561	VMM_INT_DECL(IEMXCPTRAISE) IEMEvaluateRecursiveXcpt(PVMCPUCC pVCpu, uint32_t fPrevFlags, uint8_t uPrevVector, uint32_t fCurFlags,
1562	uint8_t uCurVector, PIEMXCPTRAISEINFO pfXcptRaiseInfo)
1563	{
1564	/*
1565	* Only CPU exceptions can be raised while delivering other events, software interrupt
1566	* (INTn/INT3/INTO/ICEBP) generated exceptions cannot occur as the current (second) exception.
1567	*/
1568	AssertReturn(fCurFlags & IEM_XCPT_FLAGS_T_CPU_XCPT, IEMXCPTRAISE_INVALID);
1569	Assert(pVCpu); RT_NOREF(pVCpu);
1570	Log2(("IEMEvaluateRecursiveXcpt: uPrevVector=%#x uCurVector=%#x\n", uPrevVector, uCurVector));
1571
1572	IEMXCPTRAISE enmRaise = IEMXCPTRAISE_CURRENT_XCPT;
1573	IEMXCPTRAISEINFO fRaiseInfo = IEMXCPTRAISEINFO_NONE;
1574	if (fPrevFlags & IEM_XCPT_FLAGS_T_CPU_XCPT)
1575	{
1576	IEMXCPTCLASS enmPrevXcptClass = iemGetXcptClass(uPrevVector);
1577	if (enmPrevXcptClass != IEMXCPTCLASS_BENIGN)
1578	{
1579	IEMXCPTCLASS enmCurXcptClass = iemGetXcptClass(uCurVector);
1580	if ( enmPrevXcptClass == IEMXCPTCLASS_PAGE_FAULT
1581	&& ( enmCurXcptClass == IEMXCPTCLASS_PAGE_FAULT
1582	\|\| enmCurXcptClass == IEMXCPTCLASS_CONTRIBUTORY))
1583	{
1584	enmRaise = IEMXCPTRAISE_DOUBLE_FAULT;
1585	fRaiseInfo = enmCurXcptClass == IEMXCPTCLASS_PAGE_FAULT ? IEMXCPTRAISEINFO_PF_PF
1586	: IEMXCPTRAISEINFO_PF_CONTRIBUTORY_XCPT;
1587	Log2(("IEMEvaluateRecursiveXcpt: Vectoring page fault. uPrevVector=%#x uCurVector=%#x uCr2=%#RX64\n", uPrevVector,
1588	uCurVector, pVCpu->cpum.GstCtx.cr2));
1589	}
1590	else if ( enmPrevXcptClass == IEMXCPTCLASS_CONTRIBUTORY
1591	&& enmCurXcptClass == IEMXCPTCLASS_CONTRIBUTORY)
1592	{
1593	enmRaise = IEMXCPTRAISE_DOUBLE_FAULT;
1594	Log2(("IEMEvaluateRecursiveXcpt: uPrevVector=%#x uCurVector=%#x -> #DF\n", uPrevVector, uCurVector));
1595	}
1596	else if ( enmPrevXcptClass == IEMXCPTCLASS_DOUBLE_FAULT
1597	&& ( enmCurXcptClass == IEMXCPTCLASS_CONTRIBUTORY
1598	\|\| enmCurXcptClass == IEMXCPTCLASS_PAGE_FAULT))
1599	{
1600	enmRaise = IEMXCPTRAISE_TRIPLE_FAULT;
1601	Log2(("IEMEvaluateRecursiveXcpt: #DF handler raised a %#x exception -> triple fault\n", uCurVector));
1602	}
1603	}
1604	else
1605	{
1606	if (uPrevVector == X86_XCPT_NMI)
1607	{
1608	fRaiseInfo = IEMXCPTRAISEINFO_NMI_XCPT;
1609	if (uCurVector == X86_XCPT_PF)
1610	{
1611	fRaiseInfo \|= IEMXCPTRAISEINFO_NMI_PF;
1612	Log2(("IEMEvaluateRecursiveXcpt: NMI delivery caused a page fault\n"));
1613	}
1614	}
1615	else if ( uPrevVector == X86_XCPT_AC
1616	&& uCurVector == X86_XCPT_AC)
1617	{
1618	enmRaise = IEMXCPTRAISE_CPU_HANG;
1619	fRaiseInfo = IEMXCPTRAISEINFO_AC_AC;
1620	Log2(("IEMEvaluateRecursiveXcpt: Recursive #AC - Bad guest\n"));
1621	}
1622	}
1623	}
1624	else if (fPrevFlags & IEM_XCPT_FLAGS_T_EXT_INT)
1625	{
1626	fRaiseInfo = IEMXCPTRAISEINFO_EXT_INT_XCPT;
1627	if (uCurVector == X86_XCPT_PF)
1628	fRaiseInfo \|= IEMXCPTRAISEINFO_EXT_INT_PF;
1629	}
1630	else
1631	{
1632	Assert(fPrevFlags & IEM_XCPT_FLAGS_T_SOFT_INT);
1633	fRaiseInfo = IEMXCPTRAISEINFO_SOFT_INT_XCPT;
1634	}
1635
1636	if (pfXcptRaiseInfo)
1637	*pfXcptRaiseInfo = fRaiseInfo;
1638	return enmRaise;
1639	}
1640
1641
1642	/**
1643	* Enters the CPU shutdown state initiated by a triple fault or other
1644	* unrecoverable conditions.
1645	*
1646	* @returns Strict VBox status code.
1647	* @param pVCpu The cross context virtual CPU structure of the
1648	* calling thread.
1649	*/
1650	static VBOXSTRICTRC iemInitiateCpuShutdown(PVMCPUCC pVCpu) RT_NOEXCEPT
1651	{
1652	if (IEM_VMX_IS_NON_ROOT_MODE(pVCpu))
1653	IEM_VMX_VMEXIT_TRIPLE_FAULT_RET(pVCpu, VMX_EXIT_TRIPLE_FAULT, 0 /* u64ExitQual */);
1654
1655	if (IEM_SVM_IS_CTRL_INTERCEPT_SET(pVCpu, SVM_CTRL_INTERCEPT_SHUTDOWN))
1656	{
1657	Log2(("shutdown: Guest intercept -> #VMEXIT\n"));
1658	IEM_SVM_VMEXIT_RET(pVCpu, SVM_EXIT_SHUTDOWN, 0 /* uExitInfo1 /, 0 / uExitInfo2 */);
1659	}
1660
1661	RT_NOREF(pVCpu);
1662	return VINF_EM_TRIPLE_FAULT;
1663	}
1664
1665
1666	/**
1667	* Validates a new SS segment.
1668	*
1669	* @returns VBox strict status code.
1670	* @param pVCpu The cross context virtual CPU structure of the
1671	* calling thread.
1672	* @param NewSS The new SS selctor.
1673	* @param uCpl The CPL to load the stack for.
1674	* @param pDesc Where to return the descriptor.
1675	*/
1676	static VBOXSTRICTRC iemMiscValidateNewSS(PVMCPUCC pVCpu, RTSEL NewSS, uint8_t uCpl, PIEMSELDESC pDesc) RT_NOEXCEPT
1677	{
1678	/* Null selectors are not allowed (we're not called for dispatching
1679	interrupts with SS=0 in long mode). */
1680	if (!(NewSS & X86_SEL_MASK_OFF_RPL))
1681	{
1682	Log(("iemMiscValidateNewSSandRsp: %#x - null selector -> #TS(0)\n", NewSS));
1683	return iemRaiseTaskSwitchFault0(pVCpu);
1684	}
1685
1686	/** @todo testcase: check that the TSS.ssX RPL is checked. Also check when. */
1687	if ((NewSS & X86_SEL_RPL) != uCpl)
1688	{
1689	Log(("iemMiscValidateNewSSandRsp: %#x - RPL and CPL (%d) differs -> #TS\n", NewSS, uCpl));
1690	return iemRaiseTaskSwitchFaultBySelector(pVCpu, NewSS);
1691	}
1692
1693	/*
1694	* Read the descriptor.
1695	*/
1696	VBOXSTRICTRC rcStrict = iemMemFetchSelDesc(pVCpu, pDesc, NewSS, X86_XCPT_TS);
1697	if (rcStrict != VINF_SUCCESS)
1698	return rcStrict;
1699
1700	/*
1701	* Perform the descriptor validation documented for LSS, POP SS and MOV SS.
1702	*/
1703	if (!pDesc->Legacy.Gen.u1DescType)
1704	{
1705	Log(("iemMiscValidateNewSSandRsp: %#x - system selector (%#x) -> #TS\n", NewSS, pDesc->Legacy.Gen.u4Type));
1706	return iemRaiseTaskSwitchFaultBySelector(pVCpu, NewSS);
1707	}
1708
1709	if ( (pDesc->Legacy.Gen.u4Type & X86_SEL_TYPE_CODE)
1710	\|\| !(pDesc->Legacy.Gen.u4Type & X86_SEL_TYPE_WRITE) )
1711	{
1712	Log(("iemMiscValidateNewSSandRsp: %#x - code or read only (%#x) -> #TS\n", NewSS, pDesc->Legacy.Gen.u4Type));
1713	return iemRaiseTaskSwitchFaultBySelector(pVCpu, NewSS);
1714	}
1715	if (pDesc->Legacy.Gen.u2Dpl != uCpl)
1716	{
1717	Log(("iemMiscValidateNewSSandRsp: %#x - DPL (%d) and CPL (%d) differs -> #TS\n", NewSS, pDesc->Legacy.Gen.u2Dpl, uCpl));
1718	return iemRaiseTaskSwitchFaultBySelector(pVCpu, NewSS);
1719	}
1720
1721	/* Is it there? */
1722	/** @todo testcase: Is this checked before the canonical / limit check below? */
1723	if (!pDesc->Legacy.Gen.u1Present)
1724	{
1725	Log(("iemMiscValidateNewSSandRsp: %#x - segment not present -> #NP\n", NewSS));
1726	return iemRaiseSelectorNotPresentBySelector(pVCpu, NewSS);
1727	}
1728
1729	return VINF_SUCCESS;
1730	}
1731
1732	/** @} */
1733
1734
1735	/** @name Raising Exceptions.
1736	*
1737	* @{
1738	*/
1739
1740
1741	/**
1742	* Loads the specified stack far pointer from the TSS.
1743	*
1744	* @returns VBox strict status code.
1745	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1746	* @param uCpl The CPL to load the stack for.
1747	* @param pSelSS Where to return the new stack segment.
1748	* @param puEsp Where to return the new stack pointer.
1749	*/
1750	static VBOXSTRICTRC iemRaiseLoadStackFromTss32Or16(PVMCPUCC pVCpu, uint8_t uCpl, PRTSEL pSelSS, uint32_t *puEsp) RT_NOEXCEPT
1751	{
1752	VBOXSTRICTRC rcStrict;
1753	Assert(uCpl < 4);
1754
1755	IEM_CTX_IMPORT_RET(pVCpu, CPUMCTX_EXTRN_TR \| CPUMCTX_EXTRN_GDTR \| CPUMCTX_EXTRN_LDTR);
1756	switch (pVCpu->cpum.GstCtx.tr.Attr.n.u4Type)
1757	{
1758	/*
1759	* 16-bit TSS (X86TSS16).
1760	*/
1761	case X86_SEL_TYPE_SYS_286_TSS_AVAIL: AssertFailed(); RT_FALL_THRU();
1762	case X86_SEL_TYPE_SYS_286_TSS_BUSY:
1763	{
1764	uint32_t off = uCpl * 4 + 2;
1765	if (off + 4 <= pVCpu->cpum.GstCtx.tr.u32Limit)
1766	{
1767	/** @todo check actual access pattern here. */
1768	uint32_t u32Tmp = 0; /* gcc maybe... */
1769	rcStrict = iemMemFetchSysU32(pVCpu, &u32Tmp, UINT8_MAX, pVCpu->cpum.GstCtx.tr.u64Base + off);
1770	if (rcStrict == VINF_SUCCESS)
1771	{
1772	*puEsp = RT_LOWORD(u32Tmp);
1773	*pSelSS = RT_HIWORD(u32Tmp);
1774	return VINF_SUCCESS;
1775	}
1776	}
1777	else
1778	{
1779	Log(("LoadStackFromTss32Or16: out of bounds! uCpl=%d, u32Limit=%#x TSS16\n", uCpl, pVCpu->cpum.GstCtx.tr.u32Limit));
1780	rcStrict = iemRaiseTaskSwitchFaultCurrentTSS(pVCpu);
1781	}
1782	break;
1783	}
1784
1785	/*
1786	* 32-bit TSS (X86TSS32).
1787	*/
1788	case X86_SEL_TYPE_SYS_386_TSS_AVAIL: AssertFailed(); RT_FALL_THRU();
1789	case X86_SEL_TYPE_SYS_386_TSS_BUSY:
1790	{
1791	uint32_t off = uCpl * 8 + 4;
1792	if (off + 7 <= pVCpu->cpum.GstCtx.tr.u32Limit)
1793	{
1794	/** @todo check actual access pattern here. */
1795	uint64_t u64Tmp;
1796	rcStrict = iemMemFetchSysU64(pVCpu, &u64Tmp, UINT8_MAX, pVCpu->cpum.GstCtx.tr.u64Base + off);
1797	if (rcStrict == VINF_SUCCESS)
1798	{
1799	*puEsp = u64Tmp & UINT32_MAX;
1800	*pSelSS = (RTSEL)(u64Tmp >> 32);
1801	return VINF_SUCCESS;
1802	}
1803	}
1804	else
1805	{
1806	Log(("LoadStackFromTss32Or16: out of bounds! uCpl=%d, u32Limit=%#x TSS16\n", uCpl, pVCpu->cpum.GstCtx.tr.u32Limit));
1807	rcStrict = iemRaiseTaskSwitchFaultCurrentTSS(pVCpu);
1808	}
1809	break;
1810	}
1811
1812	default:
1813	AssertFailed();
1814	rcStrict = VERR_IEM_IPE_4;
1815	break;
1816	}
1817
1818	puEsp = 0; / make gcc happy */
1819	pSelSS = 0; / make gcc happy */
1820	return rcStrict;
1821	}
1822
1823
1824	/**
1825	* Loads the specified stack pointer from the 64-bit TSS.
1826	*
1827	* @returns VBox strict status code.
1828	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1829	* @param uCpl The CPL to load the stack for.
1830	* @param uIst The interrupt stack table index, 0 if to use uCpl.
1831	* @param puRsp Where to return the new stack pointer.
1832	*/
1833	static VBOXSTRICTRC iemRaiseLoadStackFromTss64(PVMCPUCC pVCpu, uint8_t uCpl, uint8_t uIst, uint64_t *puRsp) RT_NOEXCEPT
1834	{
1835	Assert(uCpl < 4);
1836	Assert(uIst < 8);
1837	puRsp = 0; / make gcc happy */
1838
1839	IEM_CTX_IMPORT_RET(pVCpu, CPUMCTX_EXTRN_TR \| CPUMCTX_EXTRN_GDTR \| CPUMCTX_EXTRN_LDTR);
1840	AssertReturn(pVCpu->cpum.GstCtx.tr.Attr.n.u4Type == AMD64_SEL_TYPE_SYS_TSS_BUSY, VERR_IEM_IPE_5);
1841
1842	uint32_t off;
1843	if (uIst)
1844	off = (uIst - 1) * sizeof(uint64_t) + RT_UOFFSETOF(X86TSS64, ist1);
1845	else
1846	off = uCpl * sizeof(uint64_t) + RT_UOFFSETOF(X86TSS64, rsp0);
1847	if (off + sizeof(uint64_t) > pVCpu->cpum.GstCtx.tr.u32Limit)
1848	{
1849	Log(("iemRaiseLoadStackFromTss64: out of bounds! uCpl=%d uIst=%d, u32Limit=%#x\n", uCpl, uIst, pVCpu->cpum.GstCtx.tr.u32Limit));
1850	return iemRaiseTaskSwitchFaultCurrentTSS(pVCpu);
1851	}
1852
1853	return iemMemFetchSysU64(pVCpu, puRsp, UINT8_MAX, pVCpu->cpum.GstCtx.tr.u64Base + off);
1854	}
1855
1856
1857	/**
1858	* Adjust the CPU state according to the exception being raised.
1859	*
1860	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1861	* @param u8Vector The exception that has been raised.
1862	*/
1863	DECLINLINE(void) iemRaiseXcptAdjustState(PVMCPUCC pVCpu, uint8_t u8Vector)
1864	{
1865	switch (u8Vector)
1866	{
1867	case X86_XCPT_DB:
1868	IEM_CTX_ASSERT(pVCpu, CPUMCTX_EXTRN_DR7);
1869	pVCpu->cpum.GstCtx.dr[7] &= ~X86_DR7_GD;
1870	break;
1871	/** @todo Read the AMD and Intel exception reference... */
1872	}
1873	}
1874
1875
1876	/**
1877	* Implements exceptions and interrupts for real mode.
1878	*
1879	* @returns VBox strict status code.
1880	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1881	* @param cbInstr The number of bytes to offset rIP by in the return
1882	* address.
1883	* @param u8Vector The interrupt / exception vector number.
1884	* @param fFlags The flags.
1885	* @param uErr The error value if IEM_XCPT_FLAGS_ERR is set.
1886	* @param uCr2 The CR2 value if IEM_XCPT_FLAGS_CR2 is set.
1887	*/
1888	static VBOXSTRICTRC
1889	iemRaiseXcptOrIntInRealMode(PVMCPUCC pVCpu,
1890	uint8_t cbInstr,
1891	uint8_t u8Vector,
1892	uint32_t fFlags,
1893	uint16_t uErr,
1894	uint64_t uCr2) RT_NOEXCEPT
1895	{
1896	NOREF(uErr); NOREF(uCr2);
1897	IEM_CTX_ASSERT(pVCpu, IEM_CPUMCTX_EXTRN_XCPT_MASK);
1898
1899	/*
1900	* Read the IDT entry.
1901	*/
1902	if (pVCpu->cpum.GstCtx.idtr.cbIdt < UINT32_C(4) * u8Vector + 3)
1903	{
1904	Log(("RaiseXcptOrIntInRealMode: %#x is out of bounds (%#x)\n", u8Vector, pVCpu->cpum.GstCtx.idtr.cbIdt));
1905	return iemRaiseGeneralProtectionFault(pVCpu, X86_TRAP_ERR_IDT \| ((uint16_t)u8Vector << X86_TRAP_ERR_SEL_SHIFT));
1906	}
1907	RTFAR16 Idte;
1908	VBOXSTRICTRC rcStrict = iemMemFetchDataU32(pVCpu, (uint32_t )&Idte, UINT8_MAX, pVCpu->cpum.GstCtx.idtr.pIdt + UINT32_C(4) u8Vector);
1909	if (RT_UNLIKELY(rcStrict != VINF_SUCCESS))
1910	{
1911	Log(("iemRaiseXcptOrIntInRealMode: failed to fetch IDT entry! vec=%#x rc=%Rrc\n", u8Vector, VBOXSTRICTRC_VAL(rcStrict)));
1912	return rcStrict;
1913	}
1914
1915	/*
1916	* Push the stack frame.
1917	*/
1918	uint16_t *pu16Frame;
1919	uint64_t uNewRsp;
1920	rcStrict = iemMemStackPushBeginSpecial(pVCpu, 6, 3, (void **)&pu16Frame, &uNewRsp);
1921	if (rcStrict != VINF_SUCCESS)
1922	return rcStrict;
1923
1924	uint32_t fEfl = IEMMISC_GET_EFL(pVCpu);
1925	#if IEM_CFG_TARGET_CPU == IEMTARGETCPU_DYNAMIC
1926	AssertCompile(IEMTARGETCPU_8086 <= IEMTARGETCPU_186 && IEMTARGETCPU_V20 <= IEMTARGETCPU_186 && IEMTARGETCPU_286 > IEMTARGETCPU_186);
1927	if (pVCpu->iem.s.uTargetCpu <= IEMTARGETCPU_186)
1928	fEfl \|= UINT16_C(0xf000);
1929	#endif
1930	pu16Frame[2] = (uint16_t)fEfl;
1931	pu16Frame[1] = (uint16_t)pVCpu->cpum.GstCtx.cs.Sel;
1932	pu16Frame[0] = (fFlags & IEM_XCPT_FLAGS_T_SOFT_INT) ? pVCpu->cpum.GstCtx.ip + cbInstr : pVCpu->cpum.GstCtx.ip;
1933	rcStrict = iemMemStackPushCommitSpecial(pVCpu, pu16Frame, uNewRsp);
1934	if (RT_UNLIKELY(rcStrict != VINF_SUCCESS))
1935	return rcStrict;
1936
1937	/*
1938	* Load the vector address into cs:ip and make exception specific state
1939	* adjustments.
1940	*/
1941	pVCpu->cpum.GstCtx.cs.Sel = Idte.sel;
1942	pVCpu->cpum.GstCtx.cs.ValidSel = Idte.sel;
1943	pVCpu->cpum.GstCtx.cs.fFlags = CPUMSELREG_FLAGS_VALID;
1944	pVCpu->cpum.GstCtx.cs.u64Base = (uint32_t)Idte.sel << 4;
1945	/** @todo do we load attribs and limit as well? Should we check against limit like far jump? */
1946	pVCpu->cpum.GstCtx.rip = Idte.off;
1947	fEfl &= ~(X86_EFL_IF \| X86_EFL_TF \| X86_EFL_AC);
1948	IEMMISC_SET_EFL(pVCpu, fEfl);
1949
1950	/** @todo do we actually do this in real mode? */
1951	if (fFlags & IEM_XCPT_FLAGS_T_CPU_XCPT)
1952	iemRaiseXcptAdjustState(pVCpu, u8Vector);
1953
1954	return fFlags & IEM_XCPT_FLAGS_T_CPU_XCPT ? VINF_IEM_RAISED_XCPT : VINF_SUCCESS;
1955	}
1956
1957
1958	/**
1959	* Loads a NULL data selector into when coming from V8086 mode.
1960	*
1961	* @param pVCpu The cross context virtual CPU structure of the calling thread.
1962	* @param pSReg Pointer to the segment register.
1963	*/
1964	DECLINLINE(void) iemHlpLoadNullDataSelectorOnV86Xcpt(PVMCPUCC pVCpu, PCPUMSELREG pSReg)
1965	{
1966	pSReg->Sel = 0;
1967	pSReg->ValidSel = 0;
1968	if (IEM_IS_GUEST_CPU_INTEL(pVCpu))
1969	{
1970	/* VT-x (Intel 3960x) doesn't change the base and limit, clears and sets the following attributes */
1971	pSReg->Attr.u &= X86DESCATTR_DT \| X86DESCATTR_TYPE \| X86DESCATTR_DPL \| X86DESCATTR_G \| X86DESCATTR_D;
1972	pSReg->Attr.u \|= X86DESCATTR_UNUSABLE;
1973	}
1974	else
1975	{
1976	pSReg->fFlags = CPUMSELREG_FLAGS_VALID;
1977	/** @todo check this on AMD-V */
1978	pSReg->u64Base = 0;
1979	pSReg->u32Limit = 0;
1980	}
1981	}
1982
1983
1984	/**
1985	* Loads a segment selector during a task switch in V8086 mode.
1986	*
1987	* @param pSReg Pointer to the segment register.
1988	* @param uSel The selector value to load.
1989	*/
1990	DECLINLINE(void) iemHlpLoadSelectorInV86Mode(PCPUMSELREG pSReg, uint16_t uSel)
1991	{
1992	/* See Intel spec. 26.3.1.2 "Checks on Guest Segment Registers". */
1993	pSReg->Sel = uSel;
1994	pSReg->ValidSel = uSel;
1995	pSReg->fFlags = CPUMSELREG_FLAGS_VALID;
1996	pSReg->u64Base = uSel << 4;
1997	pSReg->u32Limit = 0xffff;
1998	pSReg->Attr.u = 0xf3;
1999	}
2000
2001
2002	/**
2003	* Loads a segment selector during a task switch in protected mode.
2004	*
2005	* In this task switch scenario, we would throw \#TS exceptions rather than
2006	* \#GPs.
2007	*
2008	* @returns VBox strict status code.
2009	* @param pVCpu The cross context virtual CPU structure of the calling thread.
2010	* @param pSReg Pointer to the segment register.
2011	* @param uSel The new selector value.
2012	*
2013	* @remarks This does _not_ handle CS or SS.
2014	* @remarks This expects pVCpu->iem.s.uCpl to be up to date.
2015	*/
2016	static VBOXSTRICTRC iemHlpTaskSwitchLoadDataSelectorInProtMode(PVMCPUCC pVCpu, PCPUMSELREG pSReg, uint16_t uSel) RT_NOEXCEPT
2017	{
2018	Assert(pVCpu->iem.s.enmCpuMode != IEMMODE_64BIT);
2019
2020	/* Null data selector. */
2021	if (!(uSel & X86_SEL_MASK_OFF_RPL))
2022	{
2023	iemHlpLoadNullDataSelectorProt(pVCpu, pSReg, uSel);
2024	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, pSReg));
2025	CPUMSetChangedFlags(pVCpu, CPUM_CHANGED_HIDDEN_SEL_REGS);
2026	return VINF_SUCCESS;
2027	}
2028
2029	/* Fetch the descriptor. */
2030	IEMSELDESC Desc;
2031	VBOXSTRICTRC rcStrict = iemMemFetchSelDesc(pVCpu, &Desc, uSel, X86_XCPT_TS);
2032	if (rcStrict != VINF_SUCCESS)
2033	{
2034	Log(("iemHlpTaskSwitchLoadDataSelectorInProtMode: failed to fetch selector. uSel=%u rc=%Rrc\n", uSel,
2035	VBOXSTRICTRC_VAL(rcStrict)));
2036	return rcStrict;
2037	}
2038
2039	/* Must be a data segment or readable code segment. */
2040	if ( !Desc.Legacy.Gen.u1DescType
2041	\|\| (Desc.Legacy.Gen.u4Type & (X86_SEL_TYPE_CODE \| X86_SEL_TYPE_READ)) == X86_SEL_TYPE_CODE)
2042	{
2043	Log(("iemHlpTaskSwitchLoadDataSelectorInProtMode: invalid segment type. uSel=%u Desc.u4Type=%#x\n", uSel,
2044	Desc.Legacy.Gen.u4Type));
2045	return iemRaiseTaskSwitchFaultWithErr(pVCpu, uSel & X86_SEL_MASK_OFF_RPL);
2046	}
2047
2048	/* Check privileges for data segments and non-conforming code segments. */
2049	if ( (Desc.Legacy.Gen.u4Type & (X86_SEL_TYPE_CODE \| X86_SEL_TYPE_CONF))
2050	!= (X86_SEL_TYPE_CODE \| X86_SEL_TYPE_CONF))
2051	{
2052	/* The RPL and the new CPL must be less than or equal to the DPL. */
2053	if ( (unsigned)(uSel & X86_SEL_RPL) > Desc.Legacy.Gen.u2Dpl
2054	\|\| (pVCpu->iem.s.uCpl > Desc.Legacy.Gen.u2Dpl))
2055	{
2056	Log(("iemHlpTaskSwitchLoadDataSelectorInProtMode: Invalid priv. uSel=%u uSel.RPL=%u DPL=%u CPL=%u\n",
2057	uSel, (uSel & X86_SEL_RPL), Desc.Legacy.Gen.u2Dpl, pVCpu->iem.s.uCpl));
2058	return iemRaiseTaskSwitchFaultWithErr(pVCpu, uSel & X86_SEL_MASK_OFF_RPL);
2059	}
2060	}
2061
2062	/* Is it there? */
2063	if (!Desc.Legacy.Gen.u1Present)
2064	{
2065	Log(("iemHlpTaskSwitchLoadDataSelectorInProtMode: Segment not present. uSel=%u\n", uSel));
2066	return iemRaiseSelectorNotPresentWithErr(pVCpu, uSel & X86_SEL_MASK_OFF_RPL);
2067	}
2068
2069	/* The base and limit. */
2070	uint32_t cbLimit = X86DESC_LIMIT_G(&Desc.Legacy);
2071	uint64_t u64Base = X86DESC_BASE(&Desc.Legacy);
2072
2073	/*
2074	* Ok, everything checked out fine. Now set the accessed bit before
2075	* committing the result into the registers.
2076	*/
2077	if (!(Desc.Legacy.Gen.u4Type & X86_SEL_TYPE_ACCESSED))
2078	{
2079	rcStrict = iemMemMarkSelDescAccessed(pVCpu, uSel);
2080	if (rcStrict != VINF_SUCCESS)
2081	return rcStrict;
2082	Desc.Legacy.Gen.u4Type \|= X86_SEL_TYPE_ACCESSED;
2083	}
2084
2085	/* Commit */
2086	pSReg->Sel = uSel;
2087	pSReg->Attr.u = X86DESC_GET_HID_ATTR(&Desc.Legacy);
2088	pSReg->u32Limit = cbLimit;
2089	pSReg->u64Base = u64Base; /** @todo testcase/investigate: seen claims that the upper half of the base remains unchanged... */
2090	pSReg->ValidSel = uSel;
2091	pSReg->fFlags = CPUMSELREG_FLAGS_VALID;
2092	if (IEM_IS_GUEST_CPU_INTEL(pVCpu))
2093	pSReg->Attr.u &= ~X86DESCATTR_UNUSABLE;
2094
2095	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, pSReg));
2096	CPUMSetChangedFlags(pVCpu, CPUM_CHANGED_HIDDEN_SEL_REGS);
2097	return VINF_SUCCESS;
2098	}
2099
2100
2101	/**
2102	* Performs a task switch.
2103	*
2104	* If the task switch is the result of a JMP, CALL or IRET instruction, the
2105	* caller is responsible for performing the necessary checks (like DPL, TSS
2106	* present etc.) which are specific to JMP/CALL/IRET. See Intel Instruction
2107	* reference for JMP, CALL, IRET.
2108	*
2109	* If the task switch is the due to a software interrupt or hardware exception,
2110	* the caller is responsible for validating the TSS selector and descriptor. See
2111	* Intel Instruction reference for INT n.
2112	*
2113	* @returns VBox strict status code.
2114	* @param pVCpu The cross context virtual CPU structure of the calling thread.
2115	* @param enmTaskSwitch The cause of the task switch.
2116	* @param uNextEip The EIP effective after the task switch.
2117	* @param fFlags The flags, see IEM_XCPT_FLAGS_XXX.
2118	* @param uErr The error value if IEM_XCPT_FLAGS_ERR is set.
2119	* @param uCr2 The CR2 value if IEM_XCPT_FLAGS_CR2 is set.
2120	* @param SelTSS The TSS selector of the new task.
2121	* @param pNewDescTSS Pointer to the new TSS descriptor.
2122	*/
2123	VBOXSTRICTRC
2124	iemTaskSwitch(PVMCPUCC pVCpu,
2125	IEMTASKSWITCH enmTaskSwitch,
2126	uint32_t uNextEip,
2127	uint32_t fFlags,
2128	uint16_t uErr,
2129	uint64_t uCr2,
2130	RTSEL SelTSS,
2131	PIEMSELDESC pNewDescTSS) RT_NOEXCEPT
2132	{
2133	Assert(!IEM_IS_REAL_MODE(pVCpu));
2134	Assert(pVCpu->iem.s.enmCpuMode != IEMMODE_64BIT);
2135	IEM_CTX_ASSERT(pVCpu, IEM_CPUMCTX_EXTRN_XCPT_MASK);
2136
2137	uint32_t const uNewTSSType = pNewDescTSS->Legacy.Gate.u4Type;
2138	Assert( uNewTSSType == X86_SEL_TYPE_SYS_286_TSS_AVAIL
2139	\|\| uNewTSSType == X86_SEL_TYPE_SYS_286_TSS_BUSY
2140	\|\| uNewTSSType == X86_SEL_TYPE_SYS_386_TSS_AVAIL
2141	\|\| uNewTSSType == X86_SEL_TYPE_SYS_386_TSS_BUSY);
2142
2143	bool const fIsNewTSS386 = ( uNewTSSType == X86_SEL_TYPE_SYS_386_TSS_AVAIL
2144	\|\| uNewTSSType == X86_SEL_TYPE_SYS_386_TSS_BUSY);
2145
2146	Log(("iemTaskSwitch: enmTaskSwitch=%u NewTSS=%#x fIsNewTSS386=%RTbool EIP=%#RX32 uNextEip=%#RX32\n", enmTaskSwitch, SelTSS,
2147	fIsNewTSS386, pVCpu->cpum.GstCtx.eip, uNextEip));
2148
2149	/* Update CR2 in case it's a page-fault. */
2150	/** @todo This should probably be done much earlier in IEM/PGM. See
2151	* @bugref{5653#c49}. */
2152	if (fFlags & IEM_XCPT_FLAGS_CR2)
2153	pVCpu->cpum.GstCtx.cr2 = uCr2;
2154
2155	/*
2156	* Check the new TSS limit. See Intel spec. 6.15 "Exception and Interrupt Reference"
2157	* subsection "Interrupt 10 - Invalid TSS Exception (#TS)".
2158	*/
2159	uint32_t const uNewTSSLimit = pNewDescTSS->Legacy.Gen.u16LimitLow \| (pNewDescTSS->Legacy.Gen.u4LimitHigh << 16);
2160	uint32_t const uNewTSSLimitMin = fIsNewTSS386 ? X86_SEL_TYPE_SYS_386_TSS_LIMIT_MIN : X86_SEL_TYPE_SYS_286_TSS_LIMIT_MIN;
2161	if (uNewTSSLimit < uNewTSSLimitMin)
2162	{
2163	Log(("iemTaskSwitch: Invalid new TSS limit. enmTaskSwitch=%u uNewTSSLimit=%#x uNewTSSLimitMin=%#x -> #TS\n",
2164	enmTaskSwitch, uNewTSSLimit, uNewTSSLimitMin));
2165	return iemRaiseTaskSwitchFaultWithErr(pVCpu, SelTSS & X86_SEL_MASK_OFF_RPL);
2166	}
2167
2168	/*
2169	* Task switches in VMX non-root mode always cause task switches.
2170	* The new TSS must have been read and validated (DPL, limits etc.) before a
2171	* task-switch VM-exit commences.
2172	*
2173	* See Intel spec. 25.4.2 "Treatment of Task Switches".
2174	*/
2175	if (IEM_VMX_IS_NON_ROOT_MODE(pVCpu))
2176	{
2177	Log(("iemTaskSwitch: Guest intercept (source=%u, sel=%#x) -> VM-exit.\n", enmTaskSwitch, SelTSS));
2178	IEM_VMX_VMEXIT_TASK_SWITCH_RET(pVCpu, enmTaskSwitch, SelTSS, uNextEip - pVCpu->cpum.GstCtx.eip);
2179	}
2180
2181	/*
2182	* The SVM nested-guest intercept for task-switch takes priority over all exceptions
2183	* after validating the incoming (new) TSS, see AMD spec. 15.14.1 "Task Switch Intercept".
2184	*/
2185	if (IEM_SVM_IS_CTRL_INTERCEPT_SET(pVCpu, SVM_CTRL_INTERCEPT_TASK_SWITCH))
2186	{
2187	uint32_t const uExitInfo1 = SelTSS;
2188	uint32_t uExitInfo2 = uErr;
2189	switch (enmTaskSwitch)
2190	{
2191	case IEMTASKSWITCH_JUMP: uExitInfo2 \|= SVM_EXIT2_TASK_SWITCH_JUMP; break;
2192	case IEMTASKSWITCH_IRET: uExitInfo2 \|= SVM_EXIT2_TASK_SWITCH_IRET; break;
2193	default: break;
2194	}
2195	if (fFlags & IEM_XCPT_FLAGS_ERR)
2196	uExitInfo2 \|= SVM_EXIT2_TASK_SWITCH_HAS_ERROR_CODE;
2197	if (pVCpu->cpum.GstCtx.eflags.Bits.u1RF)
2198	uExitInfo2 \|= SVM_EXIT2_TASK_SWITCH_EFLAGS_RF;
2199
2200	Log(("iemTaskSwitch: Guest intercept -> #VMEXIT. uExitInfo1=%#RX64 uExitInfo2=%#RX64\n", uExitInfo1, uExitInfo2));
2201	IEM_SVM_VMEXIT_RET(pVCpu, SVM_EXIT_TASK_SWITCH, uExitInfo1, uExitInfo2);
2202	RT_NOREF2(uExitInfo1, uExitInfo2);
2203	}
2204
2205	/*
2206	* Check the current TSS limit. The last written byte to the current TSS during the
2207	* task switch will be 2 bytes at offset 0x5C (32-bit) and 1 byte at offset 0x28 (16-bit).
2208	* See Intel spec. 7.2.1 "Task-State Segment (TSS)" for static and dynamic fields.
2209	*
2210	* The AMD docs doesn't mention anything about limit checks with LTR which suggests you can
2211	* end up with smaller than "legal" TSS limits.
2212	*/
2213	uint32_t const uCurTSSLimit = pVCpu->cpum.GstCtx.tr.u32Limit;
2214	uint32_t const uCurTSSLimitMin = fIsNewTSS386 ? 0x5F : 0x29;
2215	if (uCurTSSLimit < uCurTSSLimitMin)
2216	{
2217	Log(("iemTaskSwitch: Invalid current TSS limit. enmTaskSwitch=%u uCurTSSLimit=%#x uCurTSSLimitMin=%#x -> #TS\n",
2218	enmTaskSwitch, uCurTSSLimit, uCurTSSLimitMin));
2219	return iemRaiseTaskSwitchFaultWithErr(pVCpu, SelTSS & X86_SEL_MASK_OFF_RPL);
2220	}
2221
2222	/*
2223	* Verify that the new TSS can be accessed and map it. Map only the required contents
2224	* and not the entire TSS.
2225	*/
2226	void *pvNewTSS;
2227	uint32_t const cbNewTSS = uNewTSSLimitMin + 1;
2228	RTGCPTR const GCPtrNewTSS = X86DESC_BASE(&pNewDescTSS->Legacy);
2229	AssertCompile(sizeof(X86TSS32) == X86_SEL_TYPE_SYS_386_TSS_LIMIT_MIN + 1);
2230	/** @todo Handle if the TSS crosses a page boundary. Intel specifies that it may
2231	* not perform correct translation if this happens. See Intel spec. 7.2.1
2232	* "Task-State Segment". */
2233	VBOXSTRICTRC rcStrict = iemMemMap(pVCpu, &pvNewTSS, cbNewTSS, UINT8_MAX, GCPtrNewTSS, IEM_ACCESS_SYS_RW, 0);
2234	if (rcStrict != VINF_SUCCESS)
2235	{
2236	Log(("iemTaskSwitch: Failed to read new TSS. enmTaskSwitch=%u cbNewTSS=%u uNewTSSLimit=%u rc=%Rrc\n", enmTaskSwitch,
2237	cbNewTSS, uNewTSSLimit, VBOXSTRICTRC_VAL(rcStrict)));
2238	return rcStrict;
2239	}
2240
2241	/*
2242	* Clear the busy bit in current task's TSS descriptor if it's a task switch due to JMP/IRET.
2243	*/
2244	uint32_t u32EFlags = pVCpu->cpum.GstCtx.eflags.u32;
2245	if ( enmTaskSwitch == IEMTASKSWITCH_JUMP
2246	\|\| enmTaskSwitch == IEMTASKSWITCH_IRET)
2247	{
2248	PX86DESC pDescCurTSS;
2249	rcStrict = iemMemMap(pVCpu, (void *)&pDescCurTSS, sizeof(pDescCurTSS), UINT8_MAX,
2250	pVCpu->cpum.GstCtx.gdtr.pGdt + (pVCpu->cpum.GstCtx.tr.Sel & X86_SEL_MASK), IEM_ACCESS_SYS_RW, 0);
2251	if (rcStrict != VINF_SUCCESS)
2252	{
2253	Log(("iemTaskSwitch: Failed to read new TSS descriptor in GDT. enmTaskSwitch=%u pGdt=%#RX64 rc=%Rrc\n",
2254	enmTaskSwitch, pVCpu->cpum.GstCtx.gdtr.pGdt, VBOXSTRICTRC_VAL(rcStrict)));
2255	return rcStrict;
2256	}
2257
2258	pDescCurTSS->Gate.u4Type &= ~X86_SEL_TYPE_SYS_TSS_BUSY_MASK;
2259	rcStrict = iemMemCommitAndUnmap(pVCpu, pDescCurTSS, IEM_ACCESS_SYS_RW);
2260	if (rcStrict != VINF_SUCCESS)
2261	{
2262	Log(("iemTaskSwitch: Failed to commit new TSS descriptor in GDT. enmTaskSwitch=%u pGdt=%#RX64 rc=%Rrc\n",
2263	enmTaskSwitch, pVCpu->cpum.GstCtx.gdtr.pGdt, VBOXSTRICTRC_VAL(rcStrict)));
2264	return rcStrict;
2265	}
2266
2267	/* Clear EFLAGS.NT (Nested Task) in the eflags memory image, if it's a task switch due to an IRET. */
2268	if (enmTaskSwitch == IEMTASKSWITCH_IRET)
2269	{
2270	Assert( uNewTSSType == X86_SEL_TYPE_SYS_286_TSS_BUSY
2271	\|\| uNewTSSType == X86_SEL_TYPE_SYS_386_TSS_BUSY);
2272	u32EFlags &= ~X86_EFL_NT;
2273	}
2274	}
2275
2276	/*
2277	* Save the CPU state into the current TSS.
2278	*/
2279	RTGCPTR const GCPtrCurTSS = pVCpu->cpum.GstCtx.tr.u64Base;
2280	if (GCPtrNewTSS == GCPtrCurTSS)
2281	{
2282	Log(("iemTaskSwitch: Switching to the same TSS! enmTaskSwitch=%u GCPtr[Cur\|New]TSS=%#RGv\n", enmTaskSwitch, GCPtrCurTSS));
2283	Log(("uCurCr3=%#x uCurEip=%#x uCurEflags=%#x uCurEax=%#x uCurEsp=%#x uCurEbp=%#x uCurCS=%#04x uCurSS=%#04x uCurLdt=%#x\n",
2284	pVCpu->cpum.GstCtx.cr3, pVCpu->cpum.GstCtx.eip, pVCpu->cpum.GstCtx.eflags.u32, pVCpu->cpum.GstCtx.eax,
2285	pVCpu->cpum.GstCtx.esp, pVCpu->cpum.GstCtx.ebp, pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.ss.Sel,
2286	pVCpu->cpum.GstCtx.ldtr.Sel));
2287	}
2288	if (fIsNewTSS386)
2289	{
2290	/*
2291	* Verify that the current TSS (32-bit) can be accessed, only the minimum required size.
2292	* See Intel spec. 7.2.1 "Task-State Segment (TSS)" for static and dynamic fields.
2293	*/
2294	void *pvCurTSS32;
2295	uint32_t const offCurTSS = RT_UOFFSETOF(X86TSS32, eip);
2296	uint32_t const cbCurTSS = RT_UOFFSETOF(X86TSS32, selLdt) - RT_UOFFSETOF(X86TSS32, eip);
2297	AssertCompile(RTASSERT_OFFSET_OF(X86TSS32, selLdt) - RTASSERT_OFFSET_OF(X86TSS32, eip) == 64);
2298	rcStrict = iemMemMap(pVCpu, &pvCurTSS32, cbCurTSS, UINT8_MAX, GCPtrCurTSS + offCurTSS, IEM_ACCESS_SYS_RW, 0);
2299	if (rcStrict != VINF_SUCCESS)
2300	{
2301	Log(("iemTaskSwitch: Failed to read current 32-bit TSS. enmTaskSwitch=%u GCPtrCurTSS=%#RGv cb=%u rc=%Rrc\n",
2302	enmTaskSwitch, GCPtrCurTSS, cbCurTSS, VBOXSTRICTRC_VAL(rcStrict)));
2303	return rcStrict;
2304	}
2305
2306	/* !! WARNING !! Access -only- the members (dynamic fields) that are mapped, i.e interval [offCurTSS..cbCurTSS). */
2307	PX86TSS32 pCurTSS32 = (PX86TSS32)((uintptr_t)pvCurTSS32 - offCurTSS);
2308	pCurTSS32->eip = uNextEip;
2309	pCurTSS32->eflags = u32EFlags;
2310	pCurTSS32->eax = pVCpu->cpum.GstCtx.eax;
2311	pCurTSS32->ecx = pVCpu->cpum.GstCtx.ecx;
2312	pCurTSS32->edx = pVCpu->cpum.GstCtx.edx;
2313	pCurTSS32->ebx = pVCpu->cpum.GstCtx.ebx;
2314	pCurTSS32->esp = pVCpu->cpum.GstCtx.esp;
2315	pCurTSS32->ebp = pVCpu->cpum.GstCtx.ebp;
2316	pCurTSS32->esi = pVCpu->cpum.GstCtx.esi;
2317	pCurTSS32->edi = pVCpu->cpum.GstCtx.edi;
2318	pCurTSS32->es = pVCpu->cpum.GstCtx.es.Sel;
2319	pCurTSS32->cs = pVCpu->cpum.GstCtx.cs.Sel;
2320	pCurTSS32->ss = pVCpu->cpum.GstCtx.ss.Sel;
2321	pCurTSS32->ds = pVCpu->cpum.GstCtx.ds.Sel;
2322	pCurTSS32->fs = pVCpu->cpum.GstCtx.fs.Sel;
2323	pCurTSS32->gs = pVCpu->cpum.GstCtx.gs.Sel;
2324
2325	rcStrict = iemMemCommitAndUnmap(pVCpu, pvCurTSS32, IEM_ACCESS_SYS_RW);
2326	if (rcStrict != VINF_SUCCESS)
2327	{
2328	Log(("iemTaskSwitch: Failed to commit current 32-bit TSS. enmTaskSwitch=%u rc=%Rrc\n", enmTaskSwitch,
2329	VBOXSTRICTRC_VAL(rcStrict)));
2330	return rcStrict;
2331	}
2332	}
2333	else
2334	{
2335	/*
2336	* Verify that the current TSS (16-bit) can be accessed. Again, only the minimum required size.
2337	*/
2338	void *pvCurTSS16;
2339	uint32_t const offCurTSS = RT_UOFFSETOF(X86TSS16, ip);
2340	uint32_t const cbCurTSS = RT_UOFFSETOF(X86TSS16, selLdt) - RT_UOFFSETOF(X86TSS16, ip);
2341	AssertCompile(RTASSERT_OFFSET_OF(X86TSS16, selLdt) - RTASSERT_OFFSET_OF(X86TSS16, ip) == 28);
2342	rcStrict = iemMemMap(pVCpu, &pvCurTSS16, cbCurTSS, UINT8_MAX, GCPtrCurTSS + offCurTSS, IEM_ACCESS_SYS_RW, 0);
2343	if (rcStrict != VINF_SUCCESS)
2344	{
2345	Log(("iemTaskSwitch: Failed to read current 16-bit TSS. enmTaskSwitch=%u GCPtrCurTSS=%#RGv cb=%u rc=%Rrc\n",
2346	enmTaskSwitch, GCPtrCurTSS, cbCurTSS, VBOXSTRICTRC_VAL(rcStrict)));
2347	return rcStrict;
2348	}
2349
2350	/* !! WARNING !! Access -only- the members (dynamic fields) that are mapped, i.e interval [offCurTSS..cbCurTSS). */
2351	PX86TSS16 pCurTSS16 = (PX86TSS16)((uintptr_t)pvCurTSS16 - offCurTSS);
2352	pCurTSS16->ip = uNextEip;
2353	pCurTSS16->flags = u32EFlags;
2354	pCurTSS16->ax = pVCpu->cpum.GstCtx.ax;
2355	pCurTSS16->cx = pVCpu->cpum.GstCtx.cx;
2356	pCurTSS16->dx = pVCpu->cpum.GstCtx.dx;
2357	pCurTSS16->bx = pVCpu->cpum.GstCtx.bx;
2358	pCurTSS16->sp = pVCpu->cpum.GstCtx.sp;
2359	pCurTSS16->bp = pVCpu->cpum.GstCtx.bp;
2360	pCurTSS16->si = pVCpu->cpum.GstCtx.si;
2361	pCurTSS16->di = pVCpu->cpum.GstCtx.di;
2362	pCurTSS16->es = pVCpu->cpum.GstCtx.es.Sel;
2363	pCurTSS16->cs = pVCpu->cpum.GstCtx.cs.Sel;
2364	pCurTSS16->ss = pVCpu->cpum.GstCtx.ss.Sel;
2365	pCurTSS16->ds = pVCpu->cpum.GstCtx.ds.Sel;
2366
2367	rcStrict = iemMemCommitAndUnmap(pVCpu, pvCurTSS16, IEM_ACCESS_SYS_RW);
2368	if (rcStrict != VINF_SUCCESS)
2369	{
2370	Log(("iemTaskSwitch: Failed to commit current 16-bit TSS. enmTaskSwitch=%u rc=%Rrc\n", enmTaskSwitch,
2371	VBOXSTRICTRC_VAL(rcStrict)));
2372	return rcStrict;
2373	}
2374	}
2375
2376	/*
2377	* Update the previous task link field for the new TSS, if the task switch is due to a CALL/INT_XCPT.
2378	*/
2379	if ( enmTaskSwitch == IEMTASKSWITCH_CALL
2380	\|\| enmTaskSwitch == IEMTASKSWITCH_INT_XCPT)
2381	{
2382	/* 16 or 32-bit TSS doesn't matter, we only access the first, common 16-bit field (selPrev) here. */
2383	PX86TSS32 pNewTSS = (PX86TSS32)pvNewTSS;
2384	pNewTSS->selPrev = pVCpu->cpum.GstCtx.tr.Sel;
2385	}
2386
2387	/*
2388	* Read the state from the new TSS into temporaries. Setting it immediately as the new CPU state is tricky,
2389	* it's done further below with error handling (e.g. CR3 changes will go through PGM).
2390	*/
2391	uint32_t uNewCr3, uNewEip, uNewEflags, uNewEax, uNewEcx, uNewEdx, uNewEbx, uNewEsp, uNewEbp, uNewEsi, uNewEdi;
2392	uint16_t uNewES, uNewCS, uNewSS, uNewDS, uNewFS, uNewGS, uNewLdt;
2393	bool fNewDebugTrap;
2394	if (fIsNewTSS386)
2395	{
2396	PCX86TSS32 pNewTSS32 = (PCX86TSS32)pvNewTSS;
2397	uNewCr3 = (pVCpu->cpum.GstCtx.cr0 & X86_CR0_PG) ? pNewTSS32->cr3 : 0;
2398	uNewEip = pNewTSS32->eip;
2399	uNewEflags = pNewTSS32->eflags;
2400	uNewEax = pNewTSS32->eax;
2401	uNewEcx = pNewTSS32->ecx;
2402	uNewEdx = pNewTSS32->edx;
2403	uNewEbx = pNewTSS32->ebx;
2404	uNewEsp = pNewTSS32->esp;
2405	uNewEbp = pNewTSS32->ebp;
2406	uNewEsi = pNewTSS32->esi;
2407	uNewEdi = pNewTSS32->edi;
2408	uNewES = pNewTSS32->es;
2409	uNewCS = pNewTSS32->cs;
2410	uNewSS = pNewTSS32->ss;
2411	uNewDS = pNewTSS32->ds;
2412	uNewFS = pNewTSS32->fs;
2413	uNewGS = pNewTSS32->gs;
2414	uNewLdt = pNewTSS32->selLdt;
2415	fNewDebugTrap = RT_BOOL(pNewTSS32->fDebugTrap);
2416	}
2417	else
2418	{
2419	PCX86TSS16 pNewTSS16 = (PCX86TSS16)pvNewTSS;
2420	uNewCr3 = 0;
2421	uNewEip = pNewTSS16->ip;
2422	uNewEflags = pNewTSS16->flags;
2423	uNewEax = UINT32_C(0xffff0000) \| pNewTSS16->ax;
2424	uNewEcx = UINT32_C(0xffff0000) \| pNewTSS16->cx;
2425	uNewEdx = UINT32_C(0xffff0000) \| pNewTSS16->dx;
2426	uNewEbx = UINT32_C(0xffff0000) \| pNewTSS16->bx;
2427	uNewEsp = UINT32_C(0xffff0000) \| pNewTSS16->sp;
2428	uNewEbp = UINT32_C(0xffff0000) \| pNewTSS16->bp;
2429	uNewEsi = UINT32_C(0xffff0000) \| pNewTSS16->si;
2430	uNewEdi = UINT32_C(0xffff0000) \| pNewTSS16->di;
2431	uNewES = pNewTSS16->es;
2432	uNewCS = pNewTSS16->cs;
2433	uNewSS = pNewTSS16->ss;
2434	uNewDS = pNewTSS16->ds;
2435	uNewFS = 0;
2436	uNewGS = 0;
2437	uNewLdt = pNewTSS16->selLdt;
2438	fNewDebugTrap = false;
2439	}
2440
2441	if (GCPtrNewTSS == GCPtrCurTSS)
2442	Log(("uNewCr3=%#x uNewEip=%#x uNewEflags=%#x uNewEax=%#x uNewEsp=%#x uNewEbp=%#x uNewCS=%#04x uNewSS=%#04x uNewLdt=%#x\n",
2443	uNewCr3, uNewEip, uNewEflags, uNewEax, uNewEsp, uNewEbp, uNewCS, uNewSS, uNewLdt));
2444
2445	/*
2446	* We're done accessing the new TSS.
2447	*/
2448	rcStrict = iemMemCommitAndUnmap(pVCpu, pvNewTSS, IEM_ACCESS_SYS_RW);
2449	if (rcStrict != VINF_SUCCESS)
2450	{
2451	Log(("iemTaskSwitch: Failed to commit new TSS. enmTaskSwitch=%u rc=%Rrc\n", enmTaskSwitch, VBOXSTRICTRC_VAL(rcStrict)));
2452	return rcStrict;
2453	}
2454
2455	/*
2456	* Set the busy bit in the new TSS descriptor, if the task switch is a JMP/CALL/INT_XCPT.
2457	*/
2458	if (enmTaskSwitch != IEMTASKSWITCH_IRET)
2459	{
2460	rcStrict = iemMemMap(pVCpu, (void *)&pNewDescTSS, sizeof(pNewDescTSS), UINT8_MAX,
2461	pVCpu->cpum.GstCtx.gdtr.pGdt + (SelTSS & X86_SEL_MASK), IEM_ACCESS_SYS_RW, 0);
2462	if (rcStrict != VINF_SUCCESS)
2463	{
2464	Log(("iemTaskSwitch: Failed to read new TSS descriptor in GDT (2). enmTaskSwitch=%u pGdt=%#RX64 rc=%Rrc\n",
2465	enmTaskSwitch, pVCpu->cpum.GstCtx.gdtr.pGdt, VBOXSTRICTRC_VAL(rcStrict)));
2466	return rcStrict;
2467	}
2468
2469	/* Check that the descriptor indicates the new TSS is available (not busy). */
2470	AssertMsg( pNewDescTSS->Legacy.Gate.u4Type == X86_SEL_TYPE_SYS_286_TSS_AVAIL
2471	\|\| pNewDescTSS->Legacy.Gate.u4Type == X86_SEL_TYPE_SYS_386_TSS_AVAIL,
2472	("Invalid TSS descriptor type=%#x", pNewDescTSS->Legacy.Gate.u4Type));
2473
2474	pNewDescTSS->Legacy.Gate.u4Type \|= X86_SEL_TYPE_SYS_TSS_BUSY_MASK;
2475	rcStrict = iemMemCommitAndUnmap(pVCpu, pNewDescTSS, IEM_ACCESS_SYS_RW);
2476	if (rcStrict != VINF_SUCCESS)
2477	{
2478	Log(("iemTaskSwitch: Failed to commit new TSS descriptor in GDT (2). enmTaskSwitch=%u pGdt=%#RX64 rc=%Rrc\n",
2479	enmTaskSwitch, pVCpu->cpum.GstCtx.gdtr.pGdt, VBOXSTRICTRC_VAL(rcStrict)));
2480	return rcStrict;
2481	}
2482	}
2483
2484	/*
2485	* From this point on, we're technically in the new task. We will defer exceptions
2486	* until the completion of the task switch but before executing any instructions in the new task.
2487	*/
2488	pVCpu->cpum.GstCtx.tr.Sel = SelTSS;
2489	pVCpu->cpum.GstCtx.tr.ValidSel = SelTSS;
2490	pVCpu->cpum.GstCtx.tr.fFlags = CPUMSELREG_FLAGS_VALID;
2491	pVCpu->cpum.GstCtx.tr.Attr.u = X86DESC_GET_HID_ATTR(&pNewDescTSS->Legacy);
2492	pVCpu->cpum.GstCtx.tr.u32Limit = X86DESC_LIMIT_G(&pNewDescTSS->Legacy);
2493	pVCpu->cpum.GstCtx.tr.u64Base = X86DESC_BASE(&pNewDescTSS->Legacy);
2494	CPUMSetChangedFlags(pVCpu, CPUM_CHANGED_TR);
2495
2496	/* Set the busy bit in TR. */
2497	pVCpu->cpum.GstCtx.tr.Attr.n.u4Type \|= X86_SEL_TYPE_SYS_TSS_BUSY_MASK;
2498
2499	/* Set EFLAGS.NT (Nested Task) in the eflags loaded from the new TSS, if it's a task switch due to a CALL/INT_XCPT. */
2500	if ( enmTaskSwitch == IEMTASKSWITCH_CALL
2501	\|\| enmTaskSwitch == IEMTASKSWITCH_INT_XCPT)
2502	{
2503	uNewEflags \|= X86_EFL_NT;
2504	}
2505
2506	pVCpu->cpum.GstCtx.dr[7] &= ~X86_DR7_LE_ALL; /** @todo Should we clear DR7.LE bit too? */
2507	pVCpu->cpum.GstCtx.cr0 \|= X86_CR0_TS;
2508	CPUMSetChangedFlags(pVCpu, CPUM_CHANGED_CR0);
2509
2510	pVCpu->cpum.GstCtx.eip = uNewEip;
2511	pVCpu->cpum.GstCtx.eax = uNewEax;
2512	pVCpu->cpum.GstCtx.ecx = uNewEcx;
2513	pVCpu->cpum.GstCtx.edx = uNewEdx;
2514	pVCpu->cpum.GstCtx.ebx = uNewEbx;
2515	pVCpu->cpum.GstCtx.esp = uNewEsp;
2516	pVCpu->cpum.GstCtx.ebp = uNewEbp;
2517	pVCpu->cpum.GstCtx.esi = uNewEsi;
2518	pVCpu->cpum.GstCtx.edi = uNewEdi;
2519
2520	uNewEflags &= X86_EFL_LIVE_MASK;
2521	uNewEflags \|= X86_EFL_RA1_MASK;
2522	IEMMISC_SET_EFL(pVCpu, uNewEflags);
2523
2524	/*
2525	* Switch the selectors here and do the segment checks later. If we throw exceptions, the selectors
2526	* will be valid in the exception handler. We cannot update the hidden parts until we've switched CR3
2527	* due to the hidden part data originating from the guest LDT/GDT which is accessed through paging.
2528	*/
2529	pVCpu->cpum.GstCtx.es.Sel = uNewES;
2530	pVCpu->cpum.GstCtx.es.Attr.u &= ~X86DESCATTR_P;
2531
2532	pVCpu->cpum.GstCtx.cs.Sel = uNewCS;
2533	pVCpu->cpum.GstCtx.cs.Attr.u &= ~X86DESCATTR_P;
2534
2535	pVCpu->cpum.GstCtx.ss.Sel = uNewSS;
2536	pVCpu->cpum.GstCtx.ss.Attr.u &= ~X86DESCATTR_P;
2537
2538	pVCpu->cpum.GstCtx.ds.Sel = uNewDS;
2539	pVCpu->cpum.GstCtx.ds.Attr.u &= ~X86DESCATTR_P;
2540
2541	pVCpu->cpum.GstCtx.fs.Sel = uNewFS;
2542	pVCpu->cpum.GstCtx.fs.Attr.u &= ~X86DESCATTR_P;
2543
2544	pVCpu->cpum.GstCtx.gs.Sel = uNewGS;
2545	pVCpu->cpum.GstCtx.gs.Attr.u &= ~X86DESCATTR_P;
2546	CPUMSetChangedFlags(pVCpu, CPUM_CHANGED_HIDDEN_SEL_REGS);
2547
2548	pVCpu->cpum.GstCtx.ldtr.Sel = uNewLdt;
2549	pVCpu->cpum.GstCtx.ldtr.fFlags = CPUMSELREG_FLAGS_STALE;
2550	pVCpu->cpum.GstCtx.ldtr.Attr.u &= ~X86DESCATTR_P;
2551	CPUMSetChangedFlags(pVCpu, CPUM_CHANGED_LDTR);
2552
2553	if (IEM_IS_GUEST_CPU_INTEL(pVCpu))
2554	{
2555	pVCpu->cpum.GstCtx.es.Attr.u \|= X86DESCATTR_UNUSABLE;
2556	pVCpu->cpum.GstCtx.cs.Attr.u \|= X86DESCATTR_UNUSABLE;
2557	pVCpu->cpum.GstCtx.ss.Attr.u \|= X86DESCATTR_UNUSABLE;
2558	pVCpu->cpum.GstCtx.ds.Attr.u \|= X86DESCATTR_UNUSABLE;
2559	pVCpu->cpum.GstCtx.fs.Attr.u \|= X86DESCATTR_UNUSABLE;
2560	pVCpu->cpum.GstCtx.gs.Attr.u \|= X86DESCATTR_UNUSABLE;
2561	pVCpu->cpum.GstCtx.ldtr.Attr.u \|= X86DESCATTR_UNUSABLE;
2562	}
2563
2564	/*
2565	* Switch CR3 for the new task.
2566	*/
2567	if ( fIsNewTSS386
2568	&& (pVCpu->cpum.GstCtx.cr0 & X86_CR0_PG))
2569	{
2570	/** @todo Should we update and flush TLBs only if CR3 value actually changes? */
2571	int rc = CPUMSetGuestCR3(pVCpu, uNewCr3);
2572	AssertRCSuccessReturn(rc, rc);
2573
2574	/* Inform PGM. */
2575	/** @todo Should we raise \#GP(0) here when PAE PDPEs are invalid? */
2576	rc = PGMFlushTLB(pVCpu, pVCpu->cpum.GstCtx.cr3, !(pVCpu->cpum.GstCtx.cr4 & X86_CR4_PGE));
2577	AssertRCReturn(rc, rc);
2578	/* ignore informational status codes */
2579
2580	CPUMSetChangedFlags(pVCpu, CPUM_CHANGED_CR3);
2581	}
2582
2583	/*
2584	* Switch LDTR for the new task.
2585	*/
2586	if (!(uNewLdt & X86_SEL_MASK_OFF_RPL))
2587	iemHlpLoadNullDataSelectorProt(pVCpu, &pVCpu->cpum.GstCtx.ldtr, uNewLdt);
2588	else
2589	{
2590	Assert(!pVCpu->cpum.GstCtx.ldtr.Attr.n.u1Present); /* Ensures that LDT.TI check passes in iemMemFetchSelDesc() below. */
2591
2592	IEMSELDESC DescNewLdt;
2593	rcStrict = iemMemFetchSelDesc(pVCpu, &DescNewLdt, uNewLdt, X86_XCPT_TS);
2594	if (rcStrict != VINF_SUCCESS)
2595	{
2596	Log(("iemTaskSwitch: fetching LDT failed. enmTaskSwitch=%u uNewLdt=%u cbGdt=%u rc=%Rrc\n", enmTaskSwitch,
2597	uNewLdt, pVCpu->cpum.GstCtx.gdtr.cbGdt, VBOXSTRICTRC_VAL(rcStrict)));
2598	return rcStrict;
2599	}
2600	if ( !DescNewLdt.Legacy.Gen.u1Present
2601	\|\| DescNewLdt.Legacy.Gen.u1DescType
2602	\|\| DescNewLdt.Legacy.Gen.u4Type != X86_SEL_TYPE_SYS_LDT)
2603	{
2604	Log(("iemTaskSwitch: Invalid LDT. enmTaskSwitch=%u uNewLdt=%u DescNewLdt.Legacy.u=%#RX64 -> #TS\n", enmTaskSwitch,
2605	uNewLdt, DescNewLdt.Legacy.u));
2606	return iemRaiseTaskSwitchFaultWithErr(pVCpu, uNewLdt & X86_SEL_MASK_OFF_RPL);
2607	}
2608
2609	pVCpu->cpum.GstCtx.ldtr.ValidSel = uNewLdt;
2610	pVCpu->cpum.GstCtx.ldtr.fFlags = CPUMSELREG_FLAGS_VALID;
2611	pVCpu->cpum.GstCtx.ldtr.u64Base = X86DESC_BASE(&DescNewLdt.Legacy);
2612	pVCpu->cpum.GstCtx.ldtr.u32Limit = X86DESC_LIMIT_G(&DescNewLdt.Legacy);
2613	pVCpu->cpum.GstCtx.ldtr.Attr.u = X86DESC_GET_HID_ATTR(&DescNewLdt.Legacy);
2614	if (IEM_IS_GUEST_CPU_INTEL(pVCpu))
2615	pVCpu->cpum.GstCtx.ldtr.Attr.u &= ~X86DESCATTR_UNUSABLE;
2616	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.ldtr));
2617	}
2618
2619	IEMSELDESC DescSS;
2620	if (IEM_IS_V86_MODE(pVCpu))
2621	{
2622	pVCpu->iem.s.uCpl = 3;
2623	iemHlpLoadSelectorInV86Mode(&pVCpu->cpum.GstCtx.es, uNewES);
2624	iemHlpLoadSelectorInV86Mode(&pVCpu->cpum.GstCtx.cs, uNewCS);
2625	iemHlpLoadSelectorInV86Mode(&pVCpu->cpum.GstCtx.ss, uNewSS);
2626	iemHlpLoadSelectorInV86Mode(&pVCpu->cpum.GstCtx.ds, uNewDS);
2627	iemHlpLoadSelectorInV86Mode(&pVCpu->cpum.GstCtx.fs, uNewFS);
2628	iemHlpLoadSelectorInV86Mode(&pVCpu->cpum.GstCtx.gs, uNewGS);
2629
2630	/* Quick fix: fake DescSS. / /* @todo fix the code further down? */
2631	DescSS.Legacy.u = 0;
2632	DescSS.Legacy.Gen.u16LimitLow = (uint16_t)pVCpu->cpum.GstCtx.ss.u32Limit;
2633	DescSS.Legacy.Gen.u4LimitHigh = pVCpu->cpum.GstCtx.ss.u32Limit >> 16;
2634	DescSS.Legacy.Gen.u16BaseLow = (uint16_t)pVCpu->cpum.GstCtx.ss.u64Base;
2635	DescSS.Legacy.Gen.u8BaseHigh1 = (uint8_t)(pVCpu->cpum.GstCtx.ss.u64Base >> 16);
2636	DescSS.Legacy.Gen.u8BaseHigh2 = (uint8_t)(pVCpu->cpum.GstCtx.ss.u64Base >> 24);
2637	DescSS.Legacy.Gen.u4Type = X86_SEL_TYPE_RW_ACC;
2638	DescSS.Legacy.Gen.u2Dpl = 3;
2639	}
2640	else
2641	{
2642	uint8_t const uNewCpl = (uNewCS & X86_SEL_RPL);
2643
2644	/*
2645	* Load the stack segment for the new task.
2646	*/
2647	if (!(uNewSS & X86_SEL_MASK_OFF_RPL))
2648	{
2649	Log(("iemTaskSwitch: Null stack segment. enmTaskSwitch=%u uNewSS=%#x -> #TS\n", enmTaskSwitch, uNewSS));
2650	return iemRaiseTaskSwitchFaultWithErr(pVCpu, uNewSS & X86_SEL_MASK_OFF_RPL);
2651	}
2652
2653	/* Fetch the descriptor. */
2654	rcStrict = iemMemFetchSelDesc(pVCpu, &DescSS, uNewSS, X86_XCPT_TS);
2655	if (rcStrict != VINF_SUCCESS)
2656	{
2657	Log(("iemTaskSwitch: failed to fetch SS. uNewSS=%#x rc=%Rrc\n", uNewSS,
2658	VBOXSTRICTRC_VAL(rcStrict)));
2659	return rcStrict;
2660	}
2661
2662	/* SS must be a data segment and writable. */
2663	if ( !DescSS.Legacy.Gen.u1DescType
2664	\|\| (DescSS.Legacy.Gen.u4Type & X86_SEL_TYPE_CODE)
2665	\|\| !(DescSS.Legacy.Gen.u4Type & X86_SEL_TYPE_WRITE))
2666	{
2667	Log(("iemTaskSwitch: SS invalid descriptor type. uNewSS=%#x u1DescType=%u u4Type=%#x\n",
2668	uNewSS, DescSS.Legacy.Gen.u1DescType, DescSS.Legacy.Gen.u4Type));
2669	return iemRaiseTaskSwitchFaultWithErr(pVCpu, uNewSS & X86_SEL_MASK_OFF_RPL);
2670	}
2671
2672	/* The SS.RPL, SS.DPL, CS.RPL (CPL) must be equal. */
2673	if ( (uNewSS & X86_SEL_RPL) != uNewCpl
2674	\|\| DescSS.Legacy.Gen.u2Dpl != uNewCpl)
2675	{
2676	Log(("iemTaskSwitch: Invalid priv. for SS. uNewSS=%#x SS.DPL=%u uNewCpl=%u -> #TS\n", uNewSS, DescSS.Legacy.Gen.u2Dpl,
2677	uNewCpl));
2678	return iemRaiseTaskSwitchFaultWithErr(pVCpu, uNewSS & X86_SEL_MASK_OFF_RPL);
2679	}
2680
2681	/* Is it there? */
2682	if (!DescSS.Legacy.Gen.u1Present)
2683	{
2684	Log(("iemTaskSwitch: SS not present. uNewSS=%#x -> #NP\n", uNewSS));
2685	return iemRaiseSelectorNotPresentWithErr(pVCpu, uNewSS & X86_SEL_MASK_OFF_RPL);
2686	}
2687
2688	uint32_t cbLimit = X86DESC_LIMIT_G(&DescSS.Legacy);
2689	uint64_t u64Base = X86DESC_BASE(&DescSS.Legacy);
2690
2691	/* Set the accessed bit before committing the result into SS. */
2692	if (!(DescSS.Legacy.Gen.u4Type & X86_SEL_TYPE_ACCESSED))
2693	{
2694	rcStrict = iemMemMarkSelDescAccessed(pVCpu, uNewSS);
2695	if (rcStrict != VINF_SUCCESS)
2696	return rcStrict;
2697	DescSS.Legacy.Gen.u4Type \|= X86_SEL_TYPE_ACCESSED;
2698	}
2699
2700	/* Commit SS. */
2701	pVCpu->cpum.GstCtx.ss.Sel = uNewSS;
2702	pVCpu->cpum.GstCtx.ss.ValidSel = uNewSS;
2703	pVCpu->cpum.GstCtx.ss.Attr.u = X86DESC_GET_HID_ATTR(&DescSS.Legacy);
2704	pVCpu->cpum.GstCtx.ss.u32Limit = cbLimit;
2705	pVCpu->cpum.GstCtx.ss.u64Base = u64Base;
2706	pVCpu->cpum.GstCtx.ss.fFlags = CPUMSELREG_FLAGS_VALID;
2707	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.ss));
2708
2709	/* CPL has changed, update IEM before loading rest of segments. */
2710	pVCpu->iem.s.uCpl = uNewCpl;
2711
2712	/*
2713	* Load the data segments for the new task.
2714	*/
2715	rcStrict = iemHlpTaskSwitchLoadDataSelectorInProtMode(pVCpu, &pVCpu->cpum.GstCtx.es, uNewES);
2716	if (rcStrict != VINF_SUCCESS)
2717	return rcStrict;
2718	rcStrict = iemHlpTaskSwitchLoadDataSelectorInProtMode(pVCpu, &pVCpu->cpum.GstCtx.ds, uNewDS);
2719	if (rcStrict != VINF_SUCCESS)
2720	return rcStrict;
2721	rcStrict = iemHlpTaskSwitchLoadDataSelectorInProtMode(pVCpu, &pVCpu->cpum.GstCtx.fs, uNewFS);
2722	if (rcStrict != VINF_SUCCESS)
2723	return rcStrict;
2724	rcStrict = iemHlpTaskSwitchLoadDataSelectorInProtMode(pVCpu, &pVCpu->cpum.GstCtx.gs, uNewGS);
2725	if (rcStrict != VINF_SUCCESS)
2726	return rcStrict;
2727
2728	/*
2729	* Load the code segment for the new task.
2730	*/
2731	if (!(uNewCS & X86_SEL_MASK_OFF_RPL))
2732	{
2733	Log(("iemTaskSwitch #TS: Null code segment. enmTaskSwitch=%u uNewCS=%#x\n", enmTaskSwitch, uNewCS));
2734	return iemRaiseTaskSwitchFaultWithErr(pVCpu, uNewCS & X86_SEL_MASK_OFF_RPL);
2735	}
2736
2737	/* Fetch the descriptor. */
2738	IEMSELDESC DescCS;
2739	rcStrict = iemMemFetchSelDesc(pVCpu, &DescCS, uNewCS, X86_XCPT_TS);
2740	if (rcStrict != VINF_SUCCESS)
2741	{
2742	Log(("iemTaskSwitch: failed to fetch CS. uNewCS=%u rc=%Rrc\n", uNewCS, VBOXSTRICTRC_VAL(rcStrict)));
2743	return rcStrict;
2744	}
2745
2746	/* CS must be a code segment. */
2747	if ( !DescCS.Legacy.Gen.u1DescType
2748	\|\| !(DescCS.Legacy.Gen.u4Type & X86_SEL_TYPE_CODE))
2749	{
2750	Log(("iemTaskSwitch: CS invalid descriptor type. uNewCS=%#x u1DescType=%u u4Type=%#x -> #TS\n", uNewCS,
2751	DescCS.Legacy.Gen.u1DescType, DescCS.Legacy.Gen.u4Type));
2752	return iemRaiseTaskSwitchFaultWithErr(pVCpu, uNewCS & X86_SEL_MASK_OFF_RPL);
2753	}
2754
2755	/* For conforming CS, DPL must be less than or equal to the RPL. */
2756	if ( (DescCS.Legacy.Gen.u4Type & X86_SEL_TYPE_CONF)
2757	&& DescCS.Legacy.Gen.u2Dpl > (uNewCS & X86_SEL_RPL))
2758	{
2759	Log(("iemTaskSwitch: confirming CS DPL > RPL. uNewCS=%#x u4Type=%#x DPL=%u -> #TS\n", uNewCS, DescCS.Legacy.Gen.u4Type,
2760	DescCS.Legacy.Gen.u2Dpl));
2761	return iemRaiseTaskSwitchFaultWithErr(pVCpu, uNewCS & X86_SEL_MASK_OFF_RPL);
2762	}
2763
2764	/* For non-conforming CS, DPL must match RPL. */
2765	if ( !(DescCS.Legacy.Gen.u4Type & X86_SEL_TYPE_CONF)
2766	&& DescCS.Legacy.Gen.u2Dpl != (uNewCS & X86_SEL_RPL))
2767	{
2768	Log(("iemTaskSwitch: non-confirming CS DPL RPL mismatch. uNewCS=%#x u4Type=%#x DPL=%u -> #TS\n", uNewCS,
2769	DescCS.Legacy.Gen.u4Type, DescCS.Legacy.Gen.u2Dpl));
2770	return iemRaiseTaskSwitchFaultWithErr(pVCpu, uNewCS & X86_SEL_MASK_OFF_RPL);
2771	}
2772
2773	/* Is it there? */
2774	if (!DescCS.Legacy.Gen.u1Present)
2775	{
2776	Log(("iemTaskSwitch: CS not present. uNewCS=%#x -> #NP\n", uNewCS));
2777	return iemRaiseSelectorNotPresentWithErr(pVCpu, uNewCS & X86_SEL_MASK_OFF_RPL);
2778	}
2779
2780	cbLimit = X86DESC_LIMIT_G(&DescCS.Legacy);
2781	u64Base = X86DESC_BASE(&DescCS.Legacy);
2782
2783	/* Set the accessed bit before committing the result into CS. */
2784	if (!(DescCS.Legacy.Gen.u4Type & X86_SEL_TYPE_ACCESSED))
2785	{
2786	rcStrict = iemMemMarkSelDescAccessed(pVCpu, uNewCS);
2787	if (rcStrict != VINF_SUCCESS)
2788	return rcStrict;
2789	DescCS.Legacy.Gen.u4Type \|= X86_SEL_TYPE_ACCESSED;
2790	}
2791
2792	/* Commit CS. */
2793	pVCpu->cpum.GstCtx.cs.Sel = uNewCS;
2794	pVCpu->cpum.GstCtx.cs.ValidSel = uNewCS;
2795	pVCpu->cpum.GstCtx.cs.Attr.u = X86DESC_GET_HID_ATTR(&DescCS.Legacy);
2796	pVCpu->cpum.GstCtx.cs.u32Limit = cbLimit;
2797	pVCpu->cpum.GstCtx.cs.u64Base = u64Base;
2798	pVCpu->cpum.GstCtx.cs.fFlags = CPUMSELREG_FLAGS_VALID;
2799	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.cs));
2800	}
2801
2802	/** @todo Debug trap. */
2803	if (fIsNewTSS386 && fNewDebugTrap)
2804	Log(("iemTaskSwitch: Debug Trap set in new TSS. Not implemented!\n"));
2805
2806	/*
2807	* Construct the error code masks based on what caused this task switch.
2808	* See Intel Instruction reference for INT.
2809	*/
2810	uint16_t uExt;
2811	if ( enmTaskSwitch == IEMTASKSWITCH_INT_XCPT
2812	&& ( !(fFlags & IEM_XCPT_FLAGS_T_SOFT_INT)
2813	\|\| (fFlags & IEM_XCPT_FLAGS_ICEBP_INSTR)))
2814	{
2815	uExt = 1;
2816	}
2817	else
2818	uExt = 0;
2819
2820	/*
2821	* Push any error code on to the new stack.
2822	*/
2823	if (fFlags & IEM_XCPT_FLAGS_ERR)
2824	{
2825	Assert(enmTaskSwitch == IEMTASKSWITCH_INT_XCPT);
2826	uint32_t cbLimitSS = X86DESC_LIMIT_G(&DescSS.Legacy);
2827	uint8_t const cbStackFrame = fIsNewTSS386 ? 4 : 2;
2828
2829	/* Check that there is sufficient space on the stack. */
2830	/** @todo Factor out segment limit checking for normal/expand down segments
2831	* into a separate function. */
2832	if (!(DescSS.Legacy.Gen.u4Type & X86_SEL_TYPE_DOWN))
2833	{
2834	if ( pVCpu->cpum.GstCtx.esp - 1 > cbLimitSS
2835	\|\| pVCpu->cpum.GstCtx.esp < cbStackFrame)
2836	{
2837	/** @todo Intel says \#SS(EXT) for INT/XCPT, I couldn't figure out AMD yet. */
2838	Log(("iemTaskSwitch: SS=%#x ESP=%#x cbStackFrame=%#x is out of bounds -> #SS\n",
2839	pVCpu->cpum.GstCtx.ss.Sel, pVCpu->cpum.GstCtx.esp, cbStackFrame));
2840	return iemRaiseStackSelectorNotPresentWithErr(pVCpu, uExt);
2841	}
2842	}
2843	else
2844	{
2845	if ( pVCpu->cpum.GstCtx.esp - 1 > (DescSS.Legacy.Gen.u1DefBig ? UINT32_MAX : UINT32_C(0xffff))
2846	\|\| pVCpu->cpum.GstCtx.esp - cbStackFrame < cbLimitSS + UINT32_C(1))
2847	{
2848	Log(("iemTaskSwitch: SS=%#x ESP=%#x cbStackFrame=%#x (expand down) is out of bounds -> #SS\n",
2849	pVCpu->cpum.GstCtx.ss.Sel, pVCpu->cpum.GstCtx.esp, cbStackFrame));
2850	return iemRaiseStackSelectorNotPresentWithErr(pVCpu, uExt);
2851	}
2852	}
2853
2854
2855	if (fIsNewTSS386)
2856	rcStrict = iemMemStackPushU32(pVCpu, uErr);
2857	else
2858	rcStrict = iemMemStackPushU16(pVCpu, uErr);
2859	if (rcStrict != VINF_SUCCESS)
2860	{
2861	Log(("iemTaskSwitch: Can't push error code to new task's stack. %s-bit TSS. rc=%Rrc\n",
2862	fIsNewTSS386 ? "32" : "16", VBOXSTRICTRC_VAL(rcStrict)));
2863	return rcStrict;
2864	}
2865	}
2866
2867	/* Check the new EIP against the new CS limit. */
2868	if (pVCpu->cpum.GstCtx.eip > pVCpu->cpum.GstCtx.cs.u32Limit)
2869	{
2870	Log(("iemHlpTaskSwitchLoadDataSelectorInProtMode: New EIP exceeds CS limit. uNewEIP=%#RX32 CS limit=%u -> #GP(0)\n",
2871	pVCpu->cpum.GstCtx.eip, pVCpu->cpum.GstCtx.cs.u32Limit));
2872	/** @todo Intel says \#GP(EXT) for INT/XCPT, I couldn't figure out AMD yet. */
2873	return iemRaiseGeneralProtectionFault(pVCpu, uExt);
2874	}
2875
2876	Log(("iemTaskSwitch: Success! New CS:EIP=%#04x:%#x SS=%#04x\n", pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.eip,
2877	pVCpu->cpum.GstCtx.ss.Sel));
2878	return fFlags & IEM_XCPT_FLAGS_T_CPU_XCPT ? VINF_IEM_RAISED_XCPT : VINF_SUCCESS;
2879	}
2880
2881
2882	/**
2883	* Implements exceptions and interrupts for protected mode.
2884	*
2885	* @returns VBox strict status code.
2886	* @param pVCpu The cross context virtual CPU structure of the calling thread.
2887	* @param cbInstr The number of bytes to offset rIP by in the return
2888	* address.
2889	* @param u8Vector The interrupt / exception vector number.
2890	* @param fFlags The flags.
2891	* @param uErr The error value if IEM_XCPT_FLAGS_ERR is set.
2892	* @param uCr2 The CR2 value if IEM_XCPT_FLAGS_CR2 is set.
2893	*/
2894	static VBOXSTRICTRC
2895	iemRaiseXcptOrIntInProtMode(PVMCPUCC pVCpu,
2896	uint8_t cbInstr,
2897	uint8_t u8Vector,
2898	uint32_t fFlags,
2899	uint16_t uErr,
2900	uint64_t uCr2) RT_NOEXCEPT
2901	{
2902	IEM_CTX_ASSERT(pVCpu, IEM_CPUMCTX_EXTRN_XCPT_MASK);
2903
2904	/*
2905	* Read the IDT entry.
2906	*/
2907	if (pVCpu->cpum.GstCtx.idtr.cbIdt < UINT32_C(8) * u8Vector + 7)
2908	{
2909	Log(("RaiseXcptOrIntInProtMode: %#x is out of bounds (%#x)\n", u8Vector, pVCpu->cpum.GstCtx.idtr.cbIdt));
2910	return iemRaiseGeneralProtectionFault(pVCpu, X86_TRAP_ERR_IDT \| ((uint16_t)u8Vector << X86_TRAP_ERR_SEL_SHIFT));
2911	}
2912	X86DESC Idte;
2913	VBOXSTRICTRC rcStrict = iemMemFetchSysU64(pVCpu, &Idte.u, UINT8_MAX,
2914	pVCpu->cpum.GstCtx.idtr.pIdt + UINT32_C(8) * u8Vector);
2915	if (RT_UNLIKELY(rcStrict != VINF_SUCCESS))
2916	{
2917	Log(("iemRaiseXcptOrIntInProtMode: failed to fetch IDT entry! vec=%#x rc=%Rrc\n", u8Vector, VBOXSTRICTRC_VAL(rcStrict)));
2918	return rcStrict;
2919	}
2920	Log(("iemRaiseXcptOrIntInProtMode: vec=%#x P=%u DPL=%u DT=%u:%u A=%u %04x:%04x%04x\n",
2921	u8Vector, Idte.Gate.u1Present, Idte.Gate.u2Dpl, Idte.Gate.u1DescType, Idte.Gate.u4Type,
2922	Idte.Gate.u5ParmCount, Idte.Gate.u16Sel, Idte.Gate.u16OffsetHigh, Idte.Gate.u16OffsetLow));
2923
2924	/*
2925	* Check the descriptor type, DPL and such.
2926	* ASSUMES this is done in the same order as described for call-gate calls.
2927	*/
2928	if (Idte.Gate.u1DescType)
2929	{
2930	Log(("RaiseXcptOrIntInProtMode %#x - not system selector (%#x) -> #GP\n", u8Vector, Idte.Gate.u4Type));
2931	return iemRaiseGeneralProtectionFault(pVCpu, X86_TRAP_ERR_IDT \| ((uint16_t)u8Vector << X86_TRAP_ERR_SEL_SHIFT));
2932	}
2933	bool fTaskGate = false;
2934	uint8_t f32BitGate = true;
2935	uint32_t fEflToClear = X86_EFL_TF \| X86_EFL_NT \| X86_EFL_RF \| X86_EFL_VM;
2936	switch (Idte.Gate.u4Type)
2937	{
2938	case X86_SEL_TYPE_SYS_UNDEFINED:
2939	case X86_SEL_TYPE_SYS_286_TSS_AVAIL:
2940	case X86_SEL_TYPE_SYS_LDT:
2941	case X86_SEL_TYPE_SYS_286_TSS_BUSY:
2942	case X86_SEL_TYPE_SYS_286_CALL_GATE:
2943	case X86_SEL_TYPE_SYS_UNDEFINED2:
2944	case X86_SEL_TYPE_SYS_386_TSS_AVAIL:
2945	case X86_SEL_TYPE_SYS_UNDEFINED3:
2946	case X86_SEL_TYPE_SYS_386_TSS_BUSY:
2947	case X86_SEL_TYPE_SYS_386_CALL_GATE:
2948	case X86_SEL_TYPE_SYS_UNDEFINED4:
2949	{
2950	/** @todo check what actually happens when the type is wrong...
2951	* esp. call gates. */
2952	Log(("RaiseXcptOrIntInProtMode %#x - invalid type (%#x) -> #GP\n", u8Vector, Idte.Gate.u4Type));
2953	return iemRaiseGeneralProtectionFault(pVCpu, X86_TRAP_ERR_IDT \| ((uint16_t)u8Vector << X86_TRAP_ERR_SEL_SHIFT));
2954	}
2955
2956	case X86_SEL_TYPE_SYS_286_INT_GATE:
2957	f32BitGate = false;
2958	RT_FALL_THRU();
2959	case X86_SEL_TYPE_SYS_386_INT_GATE:
2960	fEflToClear \|= X86_EFL_IF;
2961	break;
2962
2963	case X86_SEL_TYPE_SYS_TASK_GATE:
2964	fTaskGate = true;
2965	#ifndef IEM_IMPLEMENTS_TASKSWITCH
2966	IEM_RETURN_ASPECT_NOT_IMPLEMENTED_LOG(("Task gates\n"));
2967	#endif
2968	break;
2969
2970	case X86_SEL_TYPE_SYS_286_TRAP_GATE:
2971	f32BitGate = false;
2972	case X86_SEL_TYPE_SYS_386_TRAP_GATE:
2973	break;
2974
2975	IEM_NOT_REACHED_DEFAULT_CASE_RET();
2976	}
2977
2978	/* Check DPL against CPL if applicable. */
2979	if ((fFlags & (IEM_XCPT_FLAGS_T_SOFT_INT \| IEM_XCPT_FLAGS_ICEBP_INSTR)) == IEM_XCPT_FLAGS_T_SOFT_INT)
2980	{
2981	if (pVCpu->iem.s.uCpl > Idte.Gate.u2Dpl)
2982	{
2983	Log(("RaiseXcptOrIntInProtMode %#x - CPL (%d) > DPL (%d) -> #GP\n", u8Vector, pVCpu->iem.s.uCpl, Idte.Gate.u2Dpl));
2984	return iemRaiseGeneralProtectionFault(pVCpu, X86_TRAP_ERR_IDT \| ((uint16_t)u8Vector << X86_TRAP_ERR_SEL_SHIFT));
2985	}
2986	}
2987
2988	/* Is it there? */
2989	if (!Idte.Gate.u1Present)
2990	{
2991	Log(("RaiseXcptOrIntInProtMode %#x - not present -> #NP\n", u8Vector));
2992	return iemRaiseSelectorNotPresentWithErr(pVCpu, X86_TRAP_ERR_IDT \| ((uint16_t)u8Vector << X86_TRAP_ERR_SEL_SHIFT));
2993	}
2994
2995	/* Is it a task-gate? */
2996	if (fTaskGate)
2997	{
2998	/*
2999	* Construct the error code masks based on what caused this task switch.
3000	* See Intel Instruction reference for INT.
3001	*/
3002	uint16_t const uExt = ( (fFlags & IEM_XCPT_FLAGS_T_SOFT_INT)
3003	&& !(fFlags & IEM_XCPT_FLAGS_ICEBP_INSTR)) ? 0 : 1;
3004	uint16_t const uSelMask = X86_SEL_MASK_OFF_RPL;
3005	RTSEL SelTSS = Idte.Gate.u16Sel;
3006
3007	/*
3008	* Fetch the TSS descriptor in the GDT.
3009	*/
3010	IEMSELDESC DescTSS;
3011	rcStrict = iemMemFetchSelDescWithErr(pVCpu, &DescTSS, SelTSS, X86_XCPT_GP, (SelTSS & uSelMask) \| uExt);
3012	if (rcStrict != VINF_SUCCESS)
3013	{
3014	Log(("RaiseXcptOrIntInProtMode %#x - failed to fetch TSS selector %#x, rc=%Rrc\n", u8Vector, SelTSS,
3015	VBOXSTRICTRC_VAL(rcStrict)));
3016	return rcStrict;
3017	}
3018
3019	/* The TSS descriptor must be a system segment and be available (not busy). */
3020	if ( DescTSS.Legacy.Gen.u1DescType
3021	\|\| ( DescTSS.Legacy.Gen.u4Type != X86_SEL_TYPE_SYS_286_TSS_AVAIL
3022	&& DescTSS.Legacy.Gen.u4Type != X86_SEL_TYPE_SYS_386_TSS_AVAIL))
3023	{
3024	Log(("RaiseXcptOrIntInProtMode %#x - TSS selector %#x of task gate not a system descriptor or not available %#RX64\n",
3025	u8Vector, SelTSS, DescTSS.Legacy.au64));
3026	return iemRaiseGeneralProtectionFault(pVCpu, (SelTSS & uSelMask) \| uExt);
3027	}
3028
3029	/* The TSS must be present. */
3030	if (!DescTSS.Legacy.Gen.u1Present)
3031	{
3032	Log(("RaiseXcptOrIntInProtMode %#x - TSS selector %#x not present %#RX64\n", u8Vector, SelTSS, DescTSS.Legacy.au64));
3033	return iemRaiseSelectorNotPresentWithErr(pVCpu, (SelTSS & uSelMask) \| uExt);
3034	}
3035
3036	/* Do the actual task switch. */
3037	return iemTaskSwitch(pVCpu, IEMTASKSWITCH_INT_XCPT,
3038	(fFlags & IEM_XCPT_FLAGS_T_SOFT_INT) ? pVCpu->cpum.GstCtx.eip + cbInstr : pVCpu->cpum.GstCtx.eip,
3039	fFlags, uErr, uCr2, SelTSS, &DescTSS);
3040	}
3041
3042	/* A null CS is bad. */
3043	RTSEL NewCS = Idte.Gate.u16Sel;
3044	if (!(NewCS & X86_SEL_MASK_OFF_RPL))
3045	{
3046	Log(("RaiseXcptOrIntInProtMode %#x - CS=%#x -> #GP\n", u8Vector, NewCS));
3047	return iemRaiseGeneralProtectionFault0(pVCpu);
3048	}
3049
3050	/* Fetch the descriptor for the new CS. */
3051	IEMSELDESC DescCS;
3052	rcStrict = iemMemFetchSelDesc(pVCpu, &DescCS, NewCS, X86_XCPT_GP); /** @todo correct exception? */
3053	if (rcStrict != VINF_SUCCESS)
3054	{
3055	Log(("RaiseXcptOrIntInProtMode %#x - CS=%#x - rc=%Rrc\n", u8Vector, NewCS, VBOXSTRICTRC_VAL(rcStrict)));
3056	return rcStrict;
3057	}
3058
3059	/* Must be a code segment. */
3060	if (!DescCS.Legacy.Gen.u1DescType)
3061	{
3062	Log(("RaiseXcptOrIntInProtMode %#x - CS=%#x - system selector (%#x) -> #GP\n", u8Vector, NewCS, DescCS.Legacy.Gen.u4Type));
3063	return iemRaiseGeneralProtectionFault(pVCpu, NewCS & X86_SEL_MASK_OFF_RPL);
3064	}
3065	if (!(DescCS.Legacy.Gen.u4Type & X86_SEL_TYPE_CODE))
3066	{
3067	Log(("RaiseXcptOrIntInProtMode %#x - CS=%#x - data selector (%#x) -> #GP\n", u8Vector, NewCS, DescCS.Legacy.Gen.u4Type));
3068	return iemRaiseGeneralProtectionFault(pVCpu, NewCS & X86_SEL_MASK_OFF_RPL);
3069	}
3070
3071	/* Don't allow lowering the privilege level. */
3072	/** @todo Does the lowering of privileges apply to software interrupts
3073	* only? This has bearings on the more-privileged or
3074	* same-privilege stack behavior further down. A testcase would
3075	* be nice. */
3076	if (DescCS.Legacy.Gen.u2Dpl > pVCpu->iem.s.uCpl)
3077	{
3078	Log(("RaiseXcptOrIntInProtMode %#x - CS=%#x - DPL (%d) > CPL (%d) -> #GP\n",
3079	u8Vector, NewCS, DescCS.Legacy.Gen.u2Dpl, pVCpu->iem.s.uCpl));
3080	return iemRaiseGeneralProtectionFault(pVCpu, NewCS & X86_SEL_MASK_OFF_RPL);
3081	}
3082
3083	/* Make sure the selector is present. */
3084	if (!DescCS.Legacy.Gen.u1Present)
3085	{
3086	Log(("RaiseXcptOrIntInProtMode %#x - CS=%#x - segment not present -> #NP\n", u8Vector, NewCS));
3087	return iemRaiseSelectorNotPresentBySelector(pVCpu, NewCS);
3088	}
3089
3090	/* Check the new EIP against the new CS limit. */
3091	uint32_t const uNewEip = Idte.Gate.u4Type == X86_SEL_TYPE_SYS_286_INT_GATE
3092	\|\| Idte.Gate.u4Type == X86_SEL_TYPE_SYS_286_TRAP_GATE
3093	? Idte.Gate.u16OffsetLow
3094	: Idte.Gate.u16OffsetLow \| ((uint32_t)Idte.Gate.u16OffsetHigh << 16);
3095	uint32_t cbLimitCS = X86DESC_LIMIT_G(&DescCS.Legacy);
3096	if (uNewEip > cbLimitCS)
3097	{
3098	Log(("RaiseXcptOrIntInProtMode %#x - EIP=%#x > cbLimitCS=%#x (CS=%#x) -> #GP(0)\n",
3099	u8Vector, uNewEip, cbLimitCS, NewCS));
3100	return iemRaiseGeneralProtectionFault(pVCpu, 0);
3101	}
3102	Log7(("iemRaiseXcptOrIntInProtMode: new EIP=%#x CS=%#x\n", uNewEip, NewCS));
3103
3104	/* Calc the flag image to push. */
3105	uint32_t fEfl = IEMMISC_GET_EFL(pVCpu);
3106	if (fFlags & (IEM_XCPT_FLAGS_DRx_INSTR_BP \| IEM_XCPT_FLAGS_T_SOFT_INT))
3107	fEfl &= ~X86_EFL_RF;
3108	else
3109	fEfl \|= X86_EFL_RF; /* Vagueness is all I've found on this so far... / /* @todo Automatically pushing EFLAGS.RF. */
3110
3111	/* From V8086 mode only go to CPL 0. */
3112	uint8_t const uNewCpl = DescCS.Legacy.Gen.u4Type & X86_SEL_TYPE_CONF
3113	? pVCpu->iem.s.uCpl : DescCS.Legacy.Gen.u2Dpl;
3114	if ((fEfl & X86_EFL_VM) && uNewCpl != 0) /** @todo When exactly is this raised? */
3115	{
3116	Log(("RaiseXcptOrIntInProtMode %#x - CS=%#x - New CPL (%d) != 0 w/ VM=1 -> #GP\n", u8Vector, NewCS, uNewCpl));
3117	return iemRaiseGeneralProtectionFault(pVCpu, 0);
3118	}
3119
3120	/*
3121	* If the privilege level changes, we need to get a new stack from the TSS.
3122	* This in turns means validating the new SS and ESP...
3123	*/
3124	if (uNewCpl != pVCpu->iem.s.uCpl)
3125	{
3126	RTSEL NewSS;
3127	uint32_t uNewEsp;
3128	rcStrict = iemRaiseLoadStackFromTss32Or16(pVCpu, uNewCpl, &NewSS, &uNewEsp);
3129	if (rcStrict != VINF_SUCCESS)
3130	return rcStrict;
3131
3132	IEMSELDESC DescSS;
3133	rcStrict = iemMiscValidateNewSS(pVCpu, NewSS, uNewCpl, &DescSS);
3134	if (rcStrict != VINF_SUCCESS)
3135	return rcStrict;
3136	/* If the new SS is 16-bit, we are only going to use SP, not ESP. */
3137	if (!DescSS.Legacy.Gen.u1DefBig)
3138	{
3139	Log(("iemRaiseXcptOrIntInProtMode: Forcing ESP=%#x to 16 bits\n", uNewEsp));
3140	uNewEsp = (uint16_t)uNewEsp;
3141	}
3142
3143	Log7(("iemRaiseXcptOrIntInProtMode: New SS=%#x ESP=%#x (from TSS); current SS=%#x ESP=%#x\n", NewSS, uNewEsp, pVCpu->cpum.GstCtx.ss.Sel, pVCpu->cpum.GstCtx.esp));
3144
3145	/* Check that there is sufficient space for the stack frame. */
3146	uint32_t cbLimitSS = X86DESC_LIMIT_G(&DescSS.Legacy);
3147	uint8_t const cbStackFrame = !(fEfl & X86_EFL_VM)
3148	? (fFlags & IEM_XCPT_FLAGS_ERR ? 12 : 10) << f32BitGate
3149	: (fFlags & IEM_XCPT_FLAGS_ERR ? 20 : 18) << f32BitGate;
3150
3151	if (!(DescSS.Legacy.Gen.u4Type & X86_SEL_TYPE_DOWN))
3152	{
3153	if ( uNewEsp - 1 > cbLimitSS
3154	\|\| uNewEsp < cbStackFrame)
3155	{
3156	Log(("RaiseXcptOrIntInProtMode: %#x - SS=%#x ESP=%#x cbStackFrame=%#x is out of bounds -> #GP\n",
3157	u8Vector, NewSS, uNewEsp, cbStackFrame));
3158	return iemRaiseSelectorBoundsBySelector(pVCpu, NewSS);
3159	}
3160	}
3161	else
3162	{
3163	if ( uNewEsp - 1 > (DescSS.Legacy.Gen.u1DefBig ? UINT32_MAX : UINT16_MAX)
3164	\|\| uNewEsp - cbStackFrame < cbLimitSS + UINT32_C(1))
3165	{
3166	Log(("RaiseXcptOrIntInProtMode: %#x - SS=%#x ESP=%#x cbStackFrame=%#x (expand down) is out of bounds -> #GP\n",
3167	u8Vector, NewSS, uNewEsp, cbStackFrame));
3168	return iemRaiseSelectorBoundsBySelector(pVCpu, NewSS);
3169	}
3170	}
3171
3172	/*
3173	* Start making changes.
3174	*/
3175
3176	/* Set the new CPL so that stack accesses use it. */
3177	uint8_t const uOldCpl = pVCpu->iem.s.uCpl;
3178	pVCpu->iem.s.uCpl = uNewCpl;
3179
3180	/* Create the stack frame. */
3181	RTPTRUNION uStackFrame;
3182	rcStrict = iemMemMap(pVCpu, &uStackFrame.pv, cbStackFrame, UINT8_MAX,
3183	uNewEsp - cbStackFrame + X86DESC_BASE(&DescSS.Legacy),
3184	IEM_ACCESS_STACK_W \| IEM_ACCESS_WHAT_SYS, 0); /* _SYS is a hack ... */
3185	if (rcStrict != VINF_SUCCESS)
3186	return rcStrict;
3187	void * const pvStackFrame = uStackFrame.pv;
3188	if (f32BitGate)
3189	{
3190	if (fFlags & IEM_XCPT_FLAGS_ERR)
3191	*uStackFrame.pu32++ = uErr;
3192	uStackFrame.pu32[0] = (fFlags & IEM_XCPT_FLAGS_T_SOFT_INT) ? pVCpu->cpum.GstCtx.eip + cbInstr : pVCpu->cpum.GstCtx.eip;
3193	uStackFrame.pu32[1] = (pVCpu->cpum.GstCtx.cs.Sel & ~X86_SEL_RPL) \| uOldCpl;
3194	uStackFrame.pu32[2] = fEfl;
3195	uStackFrame.pu32[3] = pVCpu->cpum.GstCtx.esp;
3196	uStackFrame.pu32[4] = pVCpu->cpum.GstCtx.ss.Sel;
3197	Log7(("iemRaiseXcptOrIntInProtMode: 32-bit push SS=%#x ESP=%#x\n", pVCpu->cpum.GstCtx.ss.Sel, pVCpu->cpum.GstCtx.esp));
3198	if (fEfl & X86_EFL_VM)
3199	{
3200	uStackFrame.pu32[1] = pVCpu->cpum.GstCtx.cs.Sel;
3201	uStackFrame.pu32[5] = pVCpu->cpum.GstCtx.es.Sel;
3202	uStackFrame.pu32[6] = pVCpu->cpum.GstCtx.ds.Sel;
3203	uStackFrame.pu32[7] = pVCpu->cpum.GstCtx.fs.Sel;
3204	uStackFrame.pu32[8] = pVCpu->cpum.GstCtx.gs.Sel;
3205	}
3206	}
3207	else
3208	{
3209	if (fFlags & IEM_XCPT_FLAGS_ERR)
3210	*uStackFrame.pu16++ = uErr;
3211	uStackFrame.pu16[0] = (fFlags & IEM_XCPT_FLAGS_T_SOFT_INT) ? pVCpu->cpum.GstCtx.ip + cbInstr : pVCpu->cpum.GstCtx.ip;
3212	uStackFrame.pu16[1] = (pVCpu->cpum.GstCtx.cs.Sel & ~X86_SEL_RPL) \| uOldCpl;
3213	uStackFrame.pu16[2] = fEfl;
3214	uStackFrame.pu16[3] = pVCpu->cpum.GstCtx.sp;
3215	uStackFrame.pu16[4] = pVCpu->cpum.GstCtx.ss.Sel;
3216	Log7(("iemRaiseXcptOrIntInProtMode: 16-bit push SS=%#x SP=%#x\n", pVCpu->cpum.GstCtx.ss.Sel, pVCpu->cpum.GstCtx.sp));
3217	if (fEfl & X86_EFL_VM)
3218	{
3219	uStackFrame.pu16[1] = pVCpu->cpum.GstCtx.cs.Sel;
3220	uStackFrame.pu16[5] = pVCpu->cpum.GstCtx.es.Sel;
3221	uStackFrame.pu16[6] = pVCpu->cpum.GstCtx.ds.Sel;
3222	uStackFrame.pu16[7] = pVCpu->cpum.GstCtx.fs.Sel;
3223	uStackFrame.pu16[8] = pVCpu->cpum.GstCtx.gs.Sel;
3224	}
3225	}
3226	rcStrict = iemMemCommitAndUnmap(pVCpu, pvStackFrame, IEM_ACCESS_STACK_W \| IEM_ACCESS_WHAT_SYS);
3227	if (rcStrict != VINF_SUCCESS)
3228	return rcStrict;
3229
3230	/* Mark the selectors 'accessed' (hope this is the correct time). */
3231	/** @todo testcase: excatly _when_ are the accessed bits set - before or
3232	* after pushing the stack frame? (Write protect the gdt + stack to
3233	* find out.) */
3234	if (!(DescCS.Legacy.Gen.u4Type & X86_SEL_TYPE_ACCESSED))
3235	{
3236	rcStrict = iemMemMarkSelDescAccessed(pVCpu, NewCS);
3237	if (rcStrict != VINF_SUCCESS)
3238	return rcStrict;
3239	DescCS.Legacy.Gen.u4Type \|= X86_SEL_TYPE_ACCESSED;
3240	}
3241
3242	if (!(DescSS.Legacy.Gen.u4Type & X86_SEL_TYPE_ACCESSED))
3243	{
3244	rcStrict = iemMemMarkSelDescAccessed(pVCpu, NewSS);
3245	if (rcStrict != VINF_SUCCESS)
3246	return rcStrict;
3247	DescSS.Legacy.Gen.u4Type \|= X86_SEL_TYPE_ACCESSED;
3248	}
3249
3250	/*
3251	* Start comitting the register changes (joins with the DPL=CPL branch).
3252	*/
3253	pVCpu->cpum.GstCtx.ss.Sel = NewSS;
3254	pVCpu->cpum.GstCtx.ss.ValidSel = NewSS;
3255	pVCpu->cpum.GstCtx.ss.fFlags = CPUMSELREG_FLAGS_VALID;
3256	pVCpu->cpum.GstCtx.ss.u32Limit = cbLimitSS;
3257	pVCpu->cpum.GstCtx.ss.u64Base = X86DESC_BASE(&DescSS.Legacy);
3258	pVCpu->cpum.GstCtx.ss.Attr.u = X86DESC_GET_HID_ATTR(&DescSS.Legacy);
3259	/** @todo When coming from 32-bit code and operating with a 16-bit TSS and
3260	* 16-bit handler, the high word of ESP remains unchanged (i.e. only
3261	* SP is loaded).
3262	* Need to check the other combinations too:
3263	* - 16-bit TSS, 32-bit handler
3264	* - 32-bit TSS, 16-bit handler */
3265	if (!pVCpu->cpum.GstCtx.ss.Attr.n.u1DefBig)
3266	pVCpu->cpum.GstCtx.sp = (uint16_t)(uNewEsp - cbStackFrame);
3267	else
3268	pVCpu->cpum.GstCtx.rsp = uNewEsp - cbStackFrame;
3269
3270	if (fEfl & X86_EFL_VM)
3271	{
3272	iemHlpLoadNullDataSelectorOnV86Xcpt(pVCpu, &pVCpu->cpum.GstCtx.gs);
3273	iemHlpLoadNullDataSelectorOnV86Xcpt(pVCpu, &pVCpu->cpum.GstCtx.fs);
3274	iemHlpLoadNullDataSelectorOnV86Xcpt(pVCpu, &pVCpu->cpum.GstCtx.es);
3275	iemHlpLoadNullDataSelectorOnV86Xcpt(pVCpu, &pVCpu->cpum.GstCtx.ds);
3276	}
3277	}
3278	/*
3279	* Same privilege, no stack change and smaller stack frame.
3280	*/
3281	else
3282	{
3283	uint64_t uNewRsp;
3284	RTPTRUNION uStackFrame;
3285	uint8_t const cbStackFrame = (fFlags & IEM_XCPT_FLAGS_ERR ? 8 : 6) << f32BitGate;
3286	rcStrict = iemMemStackPushBeginSpecial(pVCpu, cbStackFrame, f32BitGate ? 3 : 1, &uStackFrame.pv, &uNewRsp);
3287	if (rcStrict != VINF_SUCCESS)
3288	return rcStrict;
3289	void * const pvStackFrame = uStackFrame.pv;
3290
3291	if (f32BitGate)
3292	{
3293	if (fFlags & IEM_XCPT_FLAGS_ERR)
3294	*uStackFrame.pu32++ = uErr;
3295	uStackFrame.pu32[0] = fFlags & IEM_XCPT_FLAGS_T_SOFT_INT ? pVCpu->cpum.GstCtx.eip + cbInstr : pVCpu->cpum.GstCtx.eip;
3296	uStackFrame.pu32[1] = (pVCpu->cpum.GstCtx.cs.Sel & ~X86_SEL_RPL) \| pVCpu->iem.s.uCpl;
3297	uStackFrame.pu32[2] = fEfl;
3298	}
3299	else
3300	{
3301	if (fFlags & IEM_XCPT_FLAGS_ERR)
3302	*uStackFrame.pu16++ = uErr;
3303	uStackFrame.pu16[0] = fFlags & IEM_XCPT_FLAGS_T_SOFT_INT ? pVCpu->cpum.GstCtx.eip + cbInstr : pVCpu->cpum.GstCtx.eip;
3304	uStackFrame.pu16[1] = (pVCpu->cpum.GstCtx.cs.Sel & ~X86_SEL_RPL) \| pVCpu->iem.s.uCpl;
3305	uStackFrame.pu16[2] = fEfl;
3306	}
3307	rcStrict = iemMemCommitAndUnmap(pVCpu, pvStackFrame, IEM_ACCESS_STACK_W); /* don't use the commit here */
3308	if (rcStrict != VINF_SUCCESS)
3309	return rcStrict;
3310
3311	/* Mark the CS selector as 'accessed'. */
3312	if (!(DescCS.Legacy.Gen.u4Type & X86_SEL_TYPE_ACCESSED))
3313	{
3314	rcStrict = iemMemMarkSelDescAccessed(pVCpu, NewCS);
3315	if (rcStrict != VINF_SUCCESS)
3316	return rcStrict;
3317	DescCS.Legacy.Gen.u4Type \|= X86_SEL_TYPE_ACCESSED;
3318	}
3319
3320	/*
3321	* Start committing the register changes (joins with the other branch).
3322	*/
3323	pVCpu->cpum.GstCtx.rsp = uNewRsp;
3324	}
3325
3326	/* ... register committing continues. */
3327	pVCpu->cpum.GstCtx.cs.Sel = (NewCS & ~X86_SEL_RPL) \| uNewCpl;
3328	pVCpu->cpum.GstCtx.cs.ValidSel = (NewCS & ~X86_SEL_RPL) \| uNewCpl;
3329	pVCpu->cpum.GstCtx.cs.fFlags = CPUMSELREG_FLAGS_VALID;
3330	pVCpu->cpum.GstCtx.cs.u32Limit = cbLimitCS;
3331	pVCpu->cpum.GstCtx.cs.u64Base = X86DESC_BASE(&DescCS.Legacy);
3332	pVCpu->cpum.GstCtx.cs.Attr.u = X86DESC_GET_HID_ATTR(&DescCS.Legacy);
3333
3334	pVCpu->cpum.GstCtx.rip = uNewEip; /* (The entire register is modified, see pe16_32 bs3kit tests.) */
3335	fEfl &= ~fEflToClear;
3336	IEMMISC_SET_EFL(pVCpu, fEfl);
3337
3338	if (fFlags & IEM_XCPT_FLAGS_CR2)
3339	pVCpu->cpum.GstCtx.cr2 = uCr2;
3340
3341	if (fFlags & IEM_XCPT_FLAGS_T_CPU_XCPT)
3342	iemRaiseXcptAdjustState(pVCpu, u8Vector);
3343
3344	return fFlags & IEM_XCPT_FLAGS_T_CPU_XCPT ? VINF_IEM_RAISED_XCPT : VINF_SUCCESS;
3345	}
3346
3347
3348	/**
3349	* Implements exceptions and interrupts for long mode.
3350	*
3351	* @returns VBox strict status code.
3352	* @param pVCpu The cross context virtual CPU structure of the calling thread.
3353	* @param cbInstr The number of bytes to offset rIP by in the return
3354	* address.
3355	* @param u8Vector The interrupt / exception vector number.
3356	* @param fFlags The flags.
3357	* @param uErr The error value if IEM_XCPT_FLAGS_ERR is set.
3358	* @param uCr2 The CR2 value if IEM_XCPT_FLAGS_CR2 is set.
3359	*/
3360	static VBOXSTRICTRC
3361	iemRaiseXcptOrIntInLongMode(PVMCPUCC pVCpu,
3362	uint8_t cbInstr,
3363	uint8_t u8Vector,
3364	uint32_t fFlags,
3365	uint16_t uErr,
3366	uint64_t uCr2) RT_NOEXCEPT
3367	{
3368	IEM_CTX_ASSERT(pVCpu, IEM_CPUMCTX_EXTRN_XCPT_MASK);
3369
3370	/*
3371	* Read the IDT entry.
3372	*/
3373	uint16_t offIdt = (uint16_t)u8Vector << 4;
3374	if (pVCpu->cpum.GstCtx.idtr.cbIdt < offIdt + 7)
3375	{
3376	Log(("iemRaiseXcptOrIntInLongMode: %#x is out of bounds (%#x)\n", u8Vector, pVCpu->cpum.GstCtx.idtr.cbIdt));
3377	return iemRaiseGeneralProtectionFault(pVCpu, X86_TRAP_ERR_IDT \| ((uint16_t)u8Vector << X86_TRAP_ERR_SEL_SHIFT));
3378	}
3379	X86DESC64 Idte;
3380	#ifdef _MSC_VER /* Shut up silly compiler warning. */
3381	Idte.au64[0] = 0;
3382	Idte.au64[1] = 0;
3383	#endif
3384	VBOXSTRICTRC rcStrict = iemMemFetchSysU64(pVCpu, &Idte.au64[0], UINT8_MAX, pVCpu->cpum.GstCtx.idtr.pIdt + offIdt);
3385	if (RT_LIKELY(rcStrict == VINF_SUCCESS))
3386	rcStrict = iemMemFetchSysU64(pVCpu, &Idte.au64[1], UINT8_MAX, pVCpu->cpum.GstCtx.idtr.pIdt + offIdt + 8);
3387	if (RT_UNLIKELY(rcStrict != VINF_SUCCESS))
3388	{
3389	Log(("iemRaiseXcptOrIntInLongMode: failed to fetch IDT entry! vec=%#x rc=%Rrc\n", u8Vector, VBOXSTRICTRC_VAL(rcStrict)));
3390	return rcStrict;
3391	}
3392	Log(("iemRaiseXcptOrIntInLongMode: vec=%#x P=%u DPL=%u DT=%u:%u IST=%u %04x:%08x%04x%04x\n",
3393	u8Vector, Idte.Gate.u1Present, Idte.Gate.u2Dpl, Idte.Gate.u1DescType, Idte.Gate.u4Type,
3394	Idte.Gate.u3IST, Idte.Gate.u16Sel, Idte.Gate.u32OffsetTop, Idte.Gate.u16OffsetHigh, Idte.Gate.u16OffsetLow));
3395
3396	/*
3397	* Check the descriptor type, DPL and such.
3398	* ASSUMES this is done in the same order as described for call-gate calls.
3399	*/
3400	if (Idte.Gate.u1DescType)
3401	{
3402	Log(("iemRaiseXcptOrIntInLongMode %#x - not system selector (%#x) -> #GP\n", u8Vector, Idte.Gate.u4Type));
3403	return iemRaiseGeneralProtectionFault(pVCpu, X86_TRAP_ERR_IDT \| ((uint16_t)u8Vector << X86_TRAP_ERR_SEL_SHIFT));
3404	}
3405	uint32_t fEflToClear = X86_EFL_TF \| X86_EFL_NT \| X86_EFL_RF \| X86_EFL_VM;
3406	switch (Idte.Gate.u4Type)
3407	{
3408	case AMD64_SEL_TYPE_SYS_INT_GATE:
3409	fEflToClear \|= X86_EFL_IF;
3410	break;
3411	case AMD64_SEL_TYPE_SYS_TRAP_GATE:
3412	break;
3413
3414	default:
3415	Log(("iemRaiseXcptOrIntInLongMode %#x - invalid type (%#x) -> #GP\n", u8Vector, Idte.Gate.u4Type));
3416	return iemRaiseGeneralProtectionFault(pVCpu, X86_TRAP_ERR_IDT \| ((uint16_t)u8Vector << X86_TRAP_ERR_SEL_SHIFT));
3417	}
3418
3419	/* Check DPL against CPL if applicable. */
3420	if ((fFlags & (IEM_XCPT_FLAGS_T_SOFT_INT \| IEM_XCPT_FLAGS_ICEBP_INSTR)) == IEM_XCPT_FLAGS_T_SOFT_INT)
3421	{
3422	if (pVCpu->iem.s.uCpl > Idte.Gate.u2Dpl)
3423	{
3424	Log(("iemRaiseXcptOrIntInLongMode %#x - CPL (%d) > DPL (%d) -> #GP\n", u8Vector, pVCpu->iem.s.uCpl, Idte.Gate.u2Dpl));
3425	return iemRaiseGeneralProtectionFault(pVCpu, X86_TRAP_ERR_IDT \| ((uint16_t)u8Vector << X86_TRAP_ERR_SEL_SHIFT));
3426	}
3427	}
3428
3429	/* Is it there? */
3430	if (!Idte.Gate.u1Present)
3431	{
3432	Log(("iemRaiseXcptOrIntInLongMode %#x - not present -> #NP\n", u8Vector));
3433	return iemRaiseSelectorNotPresentWithErr(pVCpu, X86_TRAP_ERR_IDT \| ((uint16_t)u8Vector << X86_TRAP_ERR_SEL_SHIFT));
3434	}
3435
3436	/* A null CS is bad. */
3437	RTSEL NewCS = Idte.Gate.u16Sel;
3438	if (!(NewCS & X86_SEL_MASK_OFF_RPL))
3439	{
3440	Log(("iemRaiseXcptOrIntInLongMode %#x - CS=%#x -> #GP\n", u8Vector, NewCS));
3441	return iemRaiseGeneralProtectionFault0(pVCpu);
3442	}
3443
3444	/* Fetch the descriptor for the new CS. */
3445	IEMSELDESC DescCS;
3446	rcStrict = iemMemFetchSelDesc(pVCpu, &DescCS, NewCS, X86_XCPT_GP);
3447	if (rcStrict != VINF_SUCCESS)
3448	{
3449	Log(("iemRaiseXcptOrIntInLongMode %#x - CS=%#x - rc=%Rrc\n", u8Vector, NewCS, VBOXSTRICTRC_VAL(rcStrict)));
3450	return rcStrict;
3451	}
3452
3453	/* Must be a 64-bit code segment. */
3454	if (!DescCS.Long.Gen.u1DescType)
3455	{
3456	Log(("iemRaiseXcptOrIntInLongMode %#x - CS=%#x - system selector (%#x) -> #GP\n", u8Vector, NewCS, DescCS.Legacy.Gen.u4Type));
3457	return iemRaiseGeneralProtectionFault(pVCpu, NewCS & X86_SEL_MASK_OFF_RPL);
3458	}
3459	if ( !DescCS.Long.Gen.u1Long
3460	\|\| DescCS.Long.Gen.u1DefBig
3461	\|\| !(DescCS.Long.Gen.u4Type & X86_SEL_TYPE_CODE) )
3462	{
3463	Log(("iemRaiseXcptOrIntInLongMode %#x - CS=%#x - not 64-bit code selector (%#x, L=%u, D=%u) -> #GP\n",
3464	u8Vector, NewCS, DescCS.Legacy.Gen.u4Type, DescCS.Long.Gen.u1Long, DescCS.Long.Gen.u1DefBig));
3465	return iemRaiseGeneralProtectionFault(pVCpu, NewCS & X86_SEL_MASK_OFF_RPL);
3466	}
3467
3468	/* Don't allow lowering the privilege level. For non-conforming CS
3469	selectors, the CS.DPL sets the privilege level the trap/interrupt
3470	handler runs at. For conforming CS selectors, the CPL remains
3471	unchanged, but the CS.DPL must be <= CPL. */
3472	/** @todo Testcase: Interrupt handler with CS.DPL=1, interrupt dispatched
3473	* when CPU in Ring-0. Result \#GP? */
3474	if (DescCS.Legacy.Gen.u2Dpl > pVCpu->iem.s.uCpl)
3475	{
3476	Log(("iemRaiseXcptOrIntInLongMode %#x - CS=%#x - DPL (%d) > CPL (%d) -> #GP\n",
3477	u8Vector, NewCS, DescCS.Legacy.Gen.u2Dpl, pVCpu->iem.s.uCpl));
3478	return iemRaiseGeneralProtectionFault(pVCpu, NewCS & X86_SEL_MASK_OFF_RPL);
3479	}
3480
3481
3482	/* Make sure the selector is present. */
3483	if (!DescCS.Legacy.Gen.u1Present)
3484	{
3485	Log(("iemRaiseXcptOrIntInLongMode %#x - CS=%#x - segment not present -> #NP\n", u8Vector, NewCS));
3486	return iemRaiseSelectorNotPresentBySelector(pVCpu, NewCS);
3487	}
3488
3489	/* Check that the new RIP is canonical. */
3490	uint64_t const uNewRip = Idte.Gate.u16OffsetLow
3491	\| ((uint32_t)Idte.Gate.u16OffsetHigh << 16)
3492	\| ((uint64_t)Idte.Gate.u32OffsetTop << 32);
3493	if (!IEM_IS_CANONICAL(uNewRip))
3494	{
3495	Log(("iemRaiseXcptOrIntInLongMode %#x - RIP=%#RX64 - Not canonical -> #GP(0)\n", u8Vector, uNewRip));
3496	return iemRaiseGeneralProtectionFault0(pVCpu);
3497	}
3498
3499	/*
3500	* If the privilege level changes or if the IST isn't zero, we need to get
3501	* a new stack from the TSS.
3502	*/
3503	uint64_t uNewRsp;
3504	uint8_t const uNewCpl = DescCS.Legacy.Gen.u4Type & X86_SEL_TYPE_CONF
3505	? pVCpu->iem.s.uCpl : DescCS.Legacy.Gen.u2Dpl;
3506	if ( uNewCpl != pVCpu->iem.s.uCpl
3507	\|\| Idte.Gate.u3IST != 0)
3508	{
3509	rcStrict = iemRaiseLoadStackFromTss64(pVCpu, uNewCpl, Idte.Gate.u3IST, &uNewRsp);
3510	if (rcStrict != VINF_SUCCESS)
3511	return rcStrict;
3512	}
3513	else
3514	uNewRsp = pVCpu->cpum.GstCtx.rsp;
3515	uNewRsp &= ~(uint64_t)0xf;
3516
3517	/*
3518	* Calc the flag image to push.
3519	*/
3520	uint32_t fEfl = IEMMISC_GET_EFL(pVCpu);
3521	if (fFlags & (IEM_XCPT_FLAGS_DRx_INSTR_BP \| IEM_XCPT_FLAGS_T_SOFT_INT))
3522	fEfl &= ~X86_EFL_RF;
3523	else
3524	fEfl \|= X86_EFL_RF; /* Vagueness is all I've found on this so far... / /* @todo Automatically pushing EFLAGS.RF. */
3525
3526	/*
3527	* Start making changes.
3528	*/
3529	/* Set the new CPL so that stack accesses use it. */
3530	uint8_t const uOldCpl = pVCpu->iem.s.uCpl;
3531	pVCpu->iem.s.uCpl = uNewCpl;
3532
3533	/* Create the stack frame. */
3534	uint32_t cbStackFrame = sizeof(uint64_t) * (5 + !!(fFlags & IEM_XCPT_FLAGS_ERR));
3535	RTPTRUNION uStackFrame;
3536	rcStrict = iemMemMap(pVCpu, &uStackFrame.pv, cbStackFrame, UINT8_MAX,
3537	uNewRsp - cbStackFrame, IEM_ACCESS_STACK_W \| IEM_ACCESS_WHAT_SYS, 0); /* _SYS is a hack ... */
3538	if (rcStrict != VINF_SUCCESS)
3539	return rcStrict;
3540	void * const pvStackFrame = uStackFrame.pv;
3541
3542	if (fFlags & IEM_XCPT_FLAGS_ERR)
3543	*uStackFrame.pu64++ = uErr;
3544	uStackFrame.pu64[0] = fFlags & IEM_XCPT_FLAGS_T_SOFT_INT ? pVCpu->cpum.GstCtx.rip + cbInstr : pVCpu->cpum.GstCtx.rip;
3545	uStackFrame.pu64[1] = (pVCpu->cpum.GstCtx.cs.Sel & ~X86_SEL_RPL) \| uOldCpl; /* CPL paranoia */
3546	uStackFrame.pu64[2] = fEfl;
3547	uStackFrame.pu64[3] = pVCpu->cpum.GstCtx.rsp;
3548	uStackFrame.pu64[4] = pVCpu->cpum.GstCtx.ss.Sel;
3549	rcStrict = iemMemCommitAndUnmap(pVCpu, pvStackFrame, IEM_ACCESS_STACK_W \| IEM_ACCESS_WHAT_SYS);
3550	if (rcStrict != VINF_SUCCESS)
3551	return rcStrict;
3552
3553	/* Mark the CS selectors 'accessed' (hope this is the correct time). */
3554	/** @todo testcase: excatly _when_ are the accessed bits set - before or
3555	* after pushing the stack frame? (Write protect the gdt + stack to
3556	* find out.) */
3557	if (!(DescCS.Legacy.Gen.u4Type & X86_SEL_TYPE_ACCESSED))
3558	{
3559	rcStrict = iemMemMarkSelDescAccessed(pVCpu, NewCS);
3560	if (rcStrict != VINF_SUCCESS)
3561	return rcStrict;
3562	DescCS.Legacy.Gen.u4Type \|= X86_SEL_TYPE_ACCESSED;
3563	}
3564
3565	/*
3566	* Start comitting the register changes.
3567	*/
3568	/** @todo research/testcase: Figure out what VT-x and AMD-V loads into the
3569	* hidden registers when interrupting 32-bit or 16-bit code! */
3570	if (uNewCpl != uOldCpl)
3571	{
3572	pVCpu->cpum.GstCtx.ss.Sel = 0 \| uNewCpl;
3573	pVCpu->cpum.GstCtx.ss.ValidSel = 0 \| uNewCpl;
3574	pVCpu->cpum.GstCtx.ss.fFlags = CPUMSELREG_FLAGS_VALID;
3575	pVCpu->cpum.GstCtx.ss.u32Limit = UINT32_MAX;
3576	pVCpu->cpum.GstCtx.ss.u64Base = 0;
3577	pVCpu->cpum.GstCtx.ss.Attr.u = (uNewCpl << X86DESCATTR_DPL_SHIFT) \| X86DESCATTR_UNUSABLE;
3578	}
3579	pVCpu->cpum.GstCtx.rsp = uNewRsp - cbStackFrame;
3580	pVCpu->cpum.GstCtx.cs.Sel = (NewCS & ~X86_SEL_RPL) \| uNewCpl;
3581	pVCpu->cpum.GstCtx.cs.ValidSel = (NewCS & ~X86_SEL_RPL) \| uNewCpl;
3582	pVCpu->cpum.GstCtx.cs.fFlags = CPUMSELREG_FLAGS_VALID;
3583	pVCpu->cpum.GstCtx.cs.u32Limit = X86DESC_LIMIT_G(&DescCS.Legacy);
3584	pVCpu->cpum.GstCtx.cs.u64Base = X86DESC_BASE(&DescCS.Legacy);
3585	pVCpu->cpum.GstCtx.cs.Attr.u = X86DESC_GET_HID_ATTR(&DescCS.Legacy);
3586	pVCpu->cpum.GstCtx.rip = uNewRip;
3587
3588	fEfl &= ~fEflToClear;
3589	IEMMISC_SET_EFL(pVCpu, fEfl);
3590
3591	if (fFlags & IEM_XCPT_FLAGS_CR2)
3592	pVCpu->cpum.GstCtx.cr2 = uCr2;
3593
3594	if (fFlags & IEM_XCPT_FLAGS_T_CPU_XCPT)
3595	iemRaiseXcptAdjustState(pVCpu, u8Vector);
3596
3597	return fFlags & IEM_XCPT_FLAGS_T_CPU_XCPT ? VINF_IEM_RAISED_XCPT : VINF_SUCCESS;
3598	}
3599
3600
3601	/**
3602	* Implements exceptions and interrupts.
3603	*
3604	* All exceptions and interrupts goes thru this function!
3605	*
3606	* @returns VBox strict status code.
3607	* @param pVCpu The cross context virtual CPU structure of the calling thread.
3608	* @param cbInstr The number of bytes to offset rIP by in the return
3609	* address.
3610	* @param u8Vector The interrupt / exception vector number.
3611	* @param fFlags The flags.
3612	* @param uErr The error value if IEM_XCPT_FLAGS_ERR is set.
3613	* @param uCr2 The CR2 value if IEM_XCPT_FLAGS_CR2 is set.
3614	*/
3615	VBOXSTRICTRC
3616	iemRaiseXcptOrInt(PVMCPUCC pVCpu,
3617	uint8_t cbInstr,
3618	uint8_t u8Vector,
3619	uint32_t fFlags,
3620	uint16_t uErr,
3621	uint64_t uCr2) RT_NOEXCEPT
3622	{
3623	/*
3624	* Get all the state that we might need here.
3625	*/
3626	IEM_CTX_IMPORT_RET(pVCpu, IEM_CPUMCTX_EXTRN_XCPT_MASK);
3627	IEM_CTX_ASSERT(pVCpu, IEM_CPUMCTX_EXTRN_XCPT_MASK);
3628
3629	#ifndef IEM_WITH_CODE_TLB /** @todo we're doing it afterwards too, that should suffice... */
3630	/*
3631	* Flush prefetch buffer
3632	*/
3633	pVCpu->iem.s.cbOpcode = pVCpu->iem.s.offOpcode;
3634	#endif
3635
3636	/*
3637	* Perform the V8086 IOPL check and upgrade the fault without nesting.
3638	*/
3639	if ( pVCpu->cpum.GstCtx.eflags.Bits.u1VM
3640	&& pVCpu->cpum.GstCtx.eflags.Bits.u2IOPL != 3
3641	&& (fFlags & ( IEM_XCPT_FLAGS_T_SOFT_INT
3642	\| IEM_XCPT_FLAGS_BP_INSTR
3643	\| IEM_XCPT_FLAGS_ICEBP_INSTR
3644	\| IEM_XCPT_FLAGS_OF_INSTR)) == IEM_XCPT_FLAGS_T_SOFT_INT
3645	&& (pVCpu->cpum.GstCtx.cr0 & X86_CR0_PE) )
3646	{
3647	Log(("iemRaiseXcptOrInt: V8086 IOPL check failed for int %#x -> #GP(0)\n", u8Vector));
3648	fFlags = IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR;
3649	u8Vector = X86_XCPT_GP;
3650	uErr = 0;
3651	}
3652	#ifdef DBGFTRACE_ENABLED
3653	RTTraceBufAddMsgF(pVCpu->CTX_SUFF(pVM)->CTX_SUFF(hTraceBuf), "Xcpt/%u: %02x %u %x %x %llx %04x:%04llx %04x:%04llx",
3654	pVCpu->iem.s.cXcptRecursions, u8Vector, cbInstr, fFlags, uErr, uCr2,
3655	pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, pVCpu->cpum.GstCtx.ss.Sel, pVCpu->cpum.GstCtx.rsp);
3656	#endif
3657
3658	/*
3659	* Evaluate whether NMI blocking should be in effect.
3660	* Normally, NMI blocking is in effect whenever we inject an NMI.
3661	*/
3662	bool fBlockNmi;
3663	if ( u8Vector == X86_XCPT_NMI
3664	&& (fFlags & IEM_XCPT_FLAGS_T_CPU_XCPT))
3665	fBlockNmi = true;
3666	else
3667	fBlockNmi = false;
3668
3669	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX
3670	if (IEM_VMX_IS_NON_ROOT_MODE(pVCpu))
3671	{
3672	VBOXSTRICTRC rcStrict0 = iemVmxVmexitEvent(pVCpu, u8Vector, fFlags, uErr, uCr2, cbInstr);
3673	if (rcStrict0 != VINF_VMX_INTERCEPT_NOT_ACTIVE)
3674	return rcStrict0;
3675
3676	/* If virtual-NMI blocking is in effect for the nested-guest, guest NMIs are not blocked. */
3677	if (pVCpu->cpum.GstCtx.hwvirt.vmx.fVirtNmiBlocking)
3678	{
3679	Assert(CPUMIsGuestVmxPinCtlsSet(&pVCpu->cpum.GstCtx, VMX_PIN_CTLS_VIRT_NMI));
3680	fBlockNmi = false;
3681	}
3682	}
3683	#endif
3684
3685	#ifdef VBOX_WITH_NESTED_HWVIRT_SVM
3686	if (CPUMIsGuestInSvmNestedHwVirtMode(IEM_GET_CTX(pVCpu)))
3687	{
3688	/*
3689	* If the event is being injected as part of VMRUN, it isn't subject to event
3690	* intercepts in the nested-guest. However, secondary exceptions that occur
3691	* during injection of any event -are- subject to exception intercepts.
3692	*
3693	* See AMD spec. 15.20 "Event Injection".
3694	*/
3695	if (!pVCpu->cpum.GstCtx.hwvirt.svm.fInterceptEvents)
3696	pVCpu->cpum.GstCtx.hwvirt.svm.fInterceptEvents = true;
3697	else
3698	{
3699	/*
3700	* Check and handle if the event being raised is intercepted.
3701	*/
3702	VBOXSTRICTRC rcStrict0 = iemHandleSvmEventIntercept(pVCpu, u8Vector, fFlags, uErr, uCr2);
3703	if (rcStrict0 != VINF_SVM_INTERCEPT_NOT_ACTIVE)
3704	return rcStrict0;
3705	}
3706	}
3707	#endif
3708
3709	/*
3710	* Set NMI blocking if necessary.
3711	*/
3712	if ( fBlockNmi
3713	&& !VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_BLOCK_NMIS))
3714	VMCPU_FF_SET(pVCpu, VMCPU_FF_BLOCK_NMIS);
3715
3716	/*
3717	* Do recursion accounting.
3718	*/
3719	uint8_t const uPrevXcpt = pVCpu->iem.s.uCurXcpt;
3720	uint32_t const fPrevXcpt = pVCpu->iem.s.fCurXcpt;
3721	if (pVCpu->iem.s.cXcptRecursions == 0)
3722	Log(("iemRaiseXcptOrInt: %#x at %04x:%RGv cbInstr=%#x fFlags=%#x uErr=%#x uCr2=%llx\n",
3723	u8Vector, pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, cbInstr, fFlags, uErr, uCr2));
3724	else
3725	{
3726	Log(("iemRaiseXcptOrInt: %#x at %04x:%RGv cbInstr=%#x fFlags=%#x uErr=%#x uCr2=%llx; prev=%#x depth=%d flags=%#x\n",
3727	u8Vector, pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, cbInstr, fFlags, uErr, uCr2, pVCpu->iem.s.uCurXcpt,
3728	pVCpu->iem.s.cXcptRecursions + 1, fPrevXcpt));
3729
3730	if (pVCpu->iem.s.cXcptRecursions >= 4)
3731	{
3732	#ifdef DEBUG_bird
3733	AssertFailed();
3734	#endif
3735	IEM_RETURN_ASPECT_NOT_IMPLEMENTED_LOG(("Too many fault nestings.\n"));
3736	}
3737
3738	/*
3739	* Evaluate the sequence of recurring events.
3740	*/
3741	IEMXCPTRAISE enmRaise = IEMEvaluateRecursiveXcpt(pVCpu, fPrevXcpt, uPrevXcpt, fFlags, u8Vector,
3742	NULL /* pXcptRaiseInfo */);
3743	if (enmRaise == IEMXCPTRAISE_CURRENT_XCPT)
3744	{ /* likely */ }
3745	else if (enmRaise == IEMXCPTRAISE_DOUBLE_FAULT)
3746	{
3747	Log2(("iemRaiseXcptOrInt: Raising double fault. uPrevXcpt=%#x\n", uPrevXcpt));
3748	fFlags = IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR;
3749	u8Vector = X86_XCPT_DF;
3750	uErr = 0;
3751	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX
3752	/* VMX nested-guest #DF intercept needs to be checked here. */
3753	if (IEM_VMX_IS_NON_ROOT_MODE(pVCpu))
3754	{
3755	VBOXSTRICTRC rcStrict0 = iemVmxVmexitEventDoubleFault(pVCpu);
3756	if (rcStrict0 != VINF_VMX_INTERCEPT_NOT_ACTIVE)
3757	return rcStrict0;
3758	}
3759	#endif
3760	/* SVM nested-guest #DF intercepts need to be checked now. See AMD spec. 15.12 "Exception Intercepts". */
3761	if (IEM_SVM_IS_XCPT_INTERCEPT_SET(pVCpu, X86_XCPT_DF))
3762	IEM_SVM_VMEXIT_RET(pVCpu, SVM_EXIT_XCPT_DF, 0 /* uExitInfo1 /, 0 / uExitInfo2 */);
3763	}
3764	else if (enmRaise == IEMXCPTRAISE_TRIPLE_FAULT)
3765	{
3766	Log2(("iemRaiseXcptOrInt: Raising triple fault. uPrevXcpt=%#x\n", uPrevXcpt));
3767	return iemInitiateCpuShutdown(pVCpu);
3768	}
3769	else if (enmRaise == IEMXCPTRAISE_CPU_HANG)
3770	{
3771	/* If a nested-guest enters an endless CPU loop condition, we'll emulate it; otherwise guru. */
3772	Log2(("iemRaiseXcptOrInt: CPU hang condition detected\n"));
3773	if ( !CPUMIsGuestInSvmNestedHwVirtMode(IEM_GET_CTX(pVCpu))
3774	&& !CPUMIsGuestInVmxNonRootMode(IEM_GET_CTX(pVCpu)))
3775	return VERR_EM_GUEST_CPU_HANG;
3776	}
3777	else
3778	{
3779	AssertMsgFailed(("Unexpected condition! enmRaise=%#x uPrevXcpt=%#x fPrevXcpt=%#x, u8Vector=%#x fFlags=%#x\n",
3780	enmRaise, uPrevXcpt, fPrevXcpt, u8Vector, fFlags));
3781	return VERR_IEM_IPE_9;
3782	}
3783
3784	/*
3785	* The 'EXT' bit is set when an exception occurs during deliver of an external
3786	* event (such as an interrupt or earlier exception)[1]. Privileged software
3787	* exception (INT1) also sets the EXT bit[2]. Exceptions generated by software
3788	* interrupts and INTO, INT3 instructions, the 'EXT' bit will not be set.
3789	*
3790	* [1] - Intel spec. 6.13 "Error Code"
3791	* [2] - Intel spec. 26.5.1.1 "Details of Vectored-Event Injection".
3792	* [3] - Intel Instruction reference for INT n.
3793	*/
3794	if ( (fPrevXcpt & (IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_T_EXT_INT \| IEM_XCPT_FLAGS_ICEBP_INSTR))
3795	&& (fFlags & IEM_XCPT_FLAGS_ERR)
3796	&& u8Vector != X86_XCPT_PF
3797	&& u8Vector != X86_XCPT_DF)
3798	{
3799	uErr \|= X86_TRAP_ERR_EXTERNAL;
3800	}
3801	}
3802
3803	pVCpu->iem.s.cXcptRecursions++;
3804	pVCpu->iem.s.uCurXcpt = u8Vector;
3805	pVCpu->iem.s.fCurXcpt = fFlags;
3806	pVCpu->iem.s.uCurXcptErr = uErr;
3807	pVCpu->iem.s.uCurXcptCr2 = uCr2;
3808
3809	/*
3810	* Extensive logging.
3811	*/
3812	#if defined(LOG_ENABLED) && defined(IN_RING3)
3813	if (LogIs3Enabled())
3814	{
3815	IEM_CTX_IMPORT_RET(pVCpu, CPUMCTX_EXTRN_DR_MASK);
3816	PVM pVM = pVCpu->CTX_SUFF(pVM);
3817	char szRegs[4096];
3818	DBGFR3RegPrintf(pVM->pUVM, pVCpu->idCpu, &szRegs[0], sizeof(szRegs),
3819	"rax=%016VR{rax} rbx=%016VR{rbx} rcx=%016VR{rcx} rdx=%016VR{rdx}\n"
3820	"rsi=%016VR{rsi} rdi=%016VR{rdi} r8 =%016VR{r8} r9 =%016VR{r9}\n"
3821	"r10=%016VR{r10} r11=%016VR{r11} r12=%016VR{r12} r13=%016VR{r13}\n"
3822	"r14=%016VR{r14} r15=%016VR{r15} %VRF{rflags}\n"
3823	"rip=%016VR{rip} rsp=%016VR{rsp} rbp=%016VR{rbp}\n"
3824	"cs={%04VR{cs} base=%016VR{cs_base} limit=%08VR{cs_lim} flags=%04VR{cs_attr}} cr0=%016VR{cr0}\n"
3825	"ds={%04VR{ds} base=%016VR{ds_base} limit=%08VR{ds_lim} flags=%04VR{ds_attr}} cr2=%016VR{cr2}\n"
3826	"es={%04VR{es} base=%016VR{es_base} limit=%08VR{es_lim} flags=%04VR{es_attr}} cr3=%016VR{cr3}\n"
3827	"fs={%04VR{fs} base=%016VR{fs_base} limit=%08VR{fs_lim} flags=%04VR{fs_attr}} cr4=%016VR{cr4}\n"
3828	"gs={%04VR{gs} base=%016VR{gs_base} limit=%08VR{gs_lim} flags=%04VR{gs_attr}} cr8=%016VR{cr8}\n"
3829	"ss={%04VR{ss} base=%016VR{ss_base} limit=%08VR{ss_lim} flags=%04VR{ss_attr}}\n"
3830	"dr0=%016VR{dr0} dr1=%016VR{dr1} dr2=%016VR{dr2} dr3=%016VR{dr3}\n"
3831	"dr6=%016VR{dr6} dr7=%016VR{dr7}\n"
3832	"gdtr=%016VR{gdtr_base}:%04VR{gdtr_lim} idtr=%016VR{idtr_base}:%04VR{idtr_lim} rflags=%08VR{rflags}\n"
3833	"ldtr={%04VR{ldtr} base=%016VR{ldtr_base} limit=%08VR{ldtr_lim} flags=%08VR{ldtr_attr}}\n"
3834	"tr ={%04VR{tr} base=%016VR{tr_base} limit=%08VR{tr_lim} flags=%08VR{tr_attr}}\n"
3835	" sysenter={cs=%04VR{sysenter_cs} eip=%08VR{sysenter_eip} esp=%08VR{sysenter_esp}}\n"
3836	" efer=%016VR{efer}\n"
3837	" pat=%016VR{pat}\n"
3838	" sf_mask=%016VR{sf_mask}\n"
3839	"krnl_gs_base=%016VR{krnl_gs_base}\n"
3840	" lstar=%016VR{lstar}\n"
3841	" star=%016VR{star} cstar=%016VR{cstar}\n"
3842	"fcw=%04VR{fcw} fsw=%04VR{fsw} ftw=%04VR{ftw} mxcsr=%04VR{mxcsr} mxcsr_mask=%04VR{mxcsr_mask}\n"
3843	);
3844
3845	char szInstr[256];
3846	DBGFR3DisasInstrEx(pVM->pUVM, pVCpu->idCpu, 0, 0,
3847	DBGF_DISAS_FLAGS_CURRENT_GUEST \| DBGF_DISAS_FLAGS_DEFAULT_MODE,
3848	szInstr, sizeof(szInstr), NULL);
3849	Log3(("%s%s\n", szRegs, szInstr));
3850	}
3851	#endif /* LOG_ENABLED */
3852
3853	/*
3854	* Stats.
3855	*/
3856	if (!(fFlags & IEM_XCPT_FLAGS_T_CPU_XCPT))
3857	STAM_REL_STATS({ pVCpu->iem.s.aStatInts[u8Vector] += 1; });
3858	else if (u8Vector <= X86_XCPT_LAST)
3859	{
3860	STAM_REL_COUNTER_INC(&pVCpu->iem.s.aStatXcpts[u8Vector]);
3861	EMHistoryAddExit(pVCpu, EMEXIT_MAKE_FT(EMEXIT_F_KIND_XCPT, u8Vector),
3862	pVCpu->cpum.GstCtx.rip + pVCpu->cpum.GstCtx.cs.u64Base, ASMReadTSC());
3863	}
3864
3865	/*
3866	* #PF's implies a INVLPG for the CR2 value (see 4.10.1.1 in Intel SDM Vol 3)
3867	* to ensure that a stale TLB or paging cache entry will only cause one
3868	* spurious #PF.
3869	*/
3870	if ( u8Vector == X86_XCPT_PF
3871	&& (fFlags & (IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_CR2)) == (IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_CR2))
3872	IEMTlbInvalidatePage(pVCpu, uCr2);
3873
3874	/*
3875	* Call the mode specific worker function.
3876	*/
3877	VBOXSTRICTRC rcStrict;
3878	if (!(pVCpu->cpum.GstCtx.cr0 & X86_CR0_PE))
3879	rcStrict = iemRaiseXcptOrIntInRealMode(pVCpu, cbInstr, u8Vector, fFlags, uErr, uCr2);
3880	else if (pVCpu->cpum.GstCtx.msrEFER & MSR_K6_EFER_LMA)
3881	rcStrict = iemRaiseXcptOrIntInLongMode(pVCpu, cbInstr, u8Vector, fFlags, uErr, uCr2);
3882	else
3883	rcStrict = iemRaiseXcptOrIntInProtMode(pVCpu, cbInstr, u8Vector, fFlags, uErr, uCr2);
3884
3885	/* Flush the prefetch buffer. */
3886	#ifdef IEM_WITH_CODE_TLB
3887	pVCpu->iem.s.pbInstrBuf = NULL;
3888	#else
3889	pVCpu->iem.s.cbOpcode = IEM_GET_INSTR_LEN(pVCpu);
3890	#endif
3891
3892	/*
3893	* Unwind.
3894	*/
3895	pVCpu->iem.s.cXcptRecursions--;
3896	pVCpu->iem.s.uCurXcpt = uPrevXcpt;
3897	pVCpu->iem.s.fCurXcpt = fPrevXcpt;
3898	Log(("iemRaiseXcptOrInt: returns %Rrc (vec=%#x); cs:rip=%04x:%RGv ss:rsp=%04x:%RGv cpl=%u depth=%d\n",
3899	VBOXSTRICTRC_VAL(rcStrict), u8Vector, pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, pVCpu->cpum.GstCtx.ss.Sel, pVCpu->cpum.GstCtx.esp, pVCpu->iem.s.uCpl,
3900	pVCpu->iem.s.cXcptRecursions + 1));
3901	return rcStrict;
3902	}
3903
3904	#ifdef IEM_WITH_SETJMP
3905	/**
3906	* See iemRaiseXcptOrInt. Will not return.
3907	*/
3908	DECL_NO_RETURN(void)
3909	iemRaiseXcptOrIntJmp(PVMCPUCC pVCpu,
3910	uint8_t cbInstr,
3911	uint8_t u8Vector,
3912	uint32_t fFlags,
3913	uint16_t uErr,
3914	uint64_t uCr2) RT_NOEXCEPT
3915	{
3916	VBOXSTRICTRC rcStrict = iemRaiseXcptOrInt(pVCpu, cbInstr, u8Vector, fFlags, uErr, uCr2);
3917	longjmp(*pVCpu->iem.s.CTX_SUFF(pJmpBuf), VBOXSTRICTRC_VAL(rcStrict));
3918	}
3919	#endif
3920
3921
3922	/** \#DE - 00. */
3923	VBOXSTRICTRC iemRaiseDivideError(PVMCPUCC pVCpu) RT_NOEXCEPT
3924	{
3925	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_DE, IEM_XCPT_FLAGS_T_CPU_XCPT, 0, 0);
3926	}
3927
3928
3929	/** \#DB - 01.
3930	* @note This automatically clear DR7.GD. */
3931	VBOXSTRICTRC iemRaiseDebugException(PVMCPUCC pVCpu) RT_NOEXCEPT
3932	{
3933	/** @todo set/clear RF. */
3934	pVCpu->cpum.GstCtx.dr[7] &= ~X86_DR7_GD;
3935	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_DB, IEM_XCPT_FLAGS_T_CPU_XCPT, 0, 0);
3936	}
3937
3938
3939	/** \#BR - 05. */
3940	VBOXSTRICTRC iemRaiseBoundRangeExceeded(PVMCPUCC pVCpu) RT_NOEXCEPT
3941	{
3942	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_BR, IEM_XCPT_FLAGS_T_CPU_XCPT, 0, 0);
3943	}
3944
3945
3946	/** \#UD - 06. */
3947	VBOXSTRICTRC iemRaiseUndefinedOpcode(PVMCPUCC pVCpu) RT_NOEXCEPT
3948	{
3949	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_UD, IEM_XCPT_FLAGS_T_CPU_XCPT, 0, 0);
3950	}
3951
3952
3953	/** \#NM - 07. */
3954	VBOXSTRICTRC iemRaiseDeviceNotAvailable(PVMCPUCC pVCpu) RT_NOEXCEPT
3955	{
3956	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_NM, IEM_XCPT_FLAGS_T_CPU_XCPT, 0, 0);
3957	}
3958
3959
3960	/** \#TS(err) - 0a. */
3961	VBOXSTRICTRC iemRaiseTaskSwitchFaultWithErr(PVMCPUCC pVCpu, uint16_t uErr) RT_NOEXCEPT
3962	{
3963	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_TS, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR, uErr, 0);
3964	}
3965
3966
3967	/** \#TS(tr) - 0a. */
3968	VBOXSTRICTRC iemRaiseTaskSwitchFaultCurrentTSS(PVMCPUCC pVCpu) RT_NOEXCEPT
3969	{
3970	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_TS, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR,
3971	pVCpu->cpum.GstCtx.tr.Sel, 0);
3972	}
3973
3974
3975	/** \#TS(0) - 0a. */
3976	VBOXSTRICTRC iemRaiseTaskSwitchFault0(PVMCPUCC pVCpu) RT_NOEXCEPT
3977	{
3978	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_TS, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR,
3979	0, 0);
3980	}
3981
3982
3983	/** \#TS(err) - 0a. */
3984	VBOXSTRICTRC iemRaiseTaskSwitchFaultBySelector(PVMCPUCC pVCpu, uint16_t uSel) RT_NOEXCEPT
3985	{
3986	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_TS, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR,
3987	uSel & X86_SEL_MASK_OFF_RPL, 0);
3988	}
3989
3990
3991	/** \#NP(err) - 0b. */
3992	VBOXSTRICTRC iemRaiseSelectorNotPresentWithErr(PVMCPUCC pVCpu, uint16_t uErr) RT_NOEXCEPT
3993	{
3994	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_NP, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR, uErr, 0);
3995	}
3996
3997
3998	/** \#NP(sel) - 0b. */
3999	VBOXSTRICTRC iemRaiseSelectorNotPresentBySelector(PVMCPUCC pVCpu, uint16_t uSel) RT_NOEXCEPT
4000	{
4001	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_NP, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR,
4002	uSel & ~X86_SEL_RPL, 0);
4003	}
4004
4005
4006	/** \#SS(seg) - 0c. */
4007	VBOXSTRICTRC iemRaiseStackSelectorNotPresentBySelector(PVMCPUCC pVCpu, uint16_t uSel) RT_NOEXCEPT
4008	{
4009	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_SS, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR,
4010	uSel & ~X86_SEL_RPL, 0);
4011	}
4012
4013
4014	/** \#SS(err) - 0c. */
4015	VBOXSTRICTRC iemRaiseStackSelectorNotPresentWithErr(PVMCPUCC pVCpu, uint16_t uErr) RT_NOEXCEPT
4016	{
4017	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_SS, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR, uErr, 0);
4018	}
4019
4020
4021	/** \#GP(n) - 0d. */
4022	VBOXSTRICTRC iemRaiseGeneralProtectionFault(PVMCPUCC pVCpu, uint16_t uErr) RT_NOEXCEPT
4023	{
4024	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_GP, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR, uErr, 0);
4025	}
4026
4027
4028	/** \#GP(0) - 0d. */
4029	VBOXSTRICTRC iemRaiseGeneralProtectionFault0(PVMCPUCC pVCpu) RT_NOEXCEPT
4030	{
4031	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_GP, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR, 0, 0);
4032	}
4033
4034	#ifdef IEM_WITH_SETJMP
4035	/** \#GP(0) - 0d. */
4036	DECL_NO_RETURN(void) iemRaiseGeneralProtectionFault0Jmp(PVMCPUCC pVCpu) RT_NOEXCEPT
4037	{
4038	iemRaiseXcptOrIntJmp(pVCpu, 0, X86_XCPT_GP, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR, 0, 0);
4039	}
4040	#endif
4041
4042
4043	/** \#GP(sel) - 0d. */
4044	VBOXSTRICTRC iemRaiseGeneralProtectionFaultBySelector(PVMCPUCC pVCpu, RTSEL Sel) RT_NOEXCEPT
4045	{
4046	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_GP, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR,
4047	Sel & ~X86_SEL_RPL, 0);
4048	}
4049
4050
4051	/** \#GP(0) - 0d. */
4052	VBOXSTRICTRC iemRaiseNotCanonical(PVMCPUCC pVCpu) RT_NOEXCEPT
4053	{
4054	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_GP, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR, 0, 0);
4055	}
4056
4057
4058	/** \#GP(sel) - 0d. */
4059	VBOXSTRICTRC iemRaiseSelectorBounds(PVMCPUCC pVCpu, uint32_t iSegReg, uint32_t fAccess) RT_NOEXCEPT
4060	{
4061	NOREF(iSegReg); NOREF(fAccess);
4062	return iemRaiseXcptOrInt(pVCpu, 0, iSegReg == X86_SREG_SS ? X86_XCPT_SS : X86_XCPT_GP,
4063	IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR, 0, 0);
4064	}
4065
4066	#ifdef IEM_WITH_SETJMP
4067	/** \#GP(sel) - 0d, longjmp. */
4068	DECL_NO_RETURN(void) iemRaiseSelectorBoundsJmp(PVMCPUCC pVCpu, uint32_t iSegReg, uint32_t fAccess) RT_NOEXCEPT
4069	{
4070	NOREF(iSegReg); NOREF(fAccess);
4071	iemRaiseXcptOrIntJmp(pVCpu, 0, iSegReg == X86_SREG_SS ? X86_XCPT_SS : X86_XCPT_GP,
4072	IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR, 0, 0);
4073	}
4074	#endif
4075
4076	/** \#GP(sel) - 0d. */
4077	VBOXSTRICTRC iemRaiseSelectorBoundsBySelector(PVMCPUCC pVCpu, RTSEL Sel) RT_NOEXCEPT
4078	{
4079	NOREF(Sel);
4080	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_GP, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR, 0, 0);
4081	}
4082
4083	#ifdef IEM_WITH_SETJMP
4084	/** \#GP(sel) - 0d, longjmp. */
4085	DECL_NO_RETURN(void) iemRaiseSelectorBoundsBySelectorJmp(PVMCPUCC pVCpu, RTSEL Sel) RT_NOEXCEPT
4086	{
4087	NOREF(Sel);
4088	iemRaiseXcptOrIntJmp(pVCpu, 0, X86_XCPT_GP, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR, 0, 0);
4089	}
4090	#endif
4091
4092
4093	/** \#GP(sel) - 0d. */
4094	VBOXSTRICTRC iemRaiseSelectorInvalidAccess(PVMCPUCC pVCpu, uint32_t iSegReg, uint32_t fAccess) RT_NOEXCEPT
4095	{
4096	NOREF(iSegReg); NOREF(fAccess);
4097	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_GP, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR, 0, 0);
4098	}
4099
4100	#ifdef IEM_WITH_SETJMP
4101	/** \#GP(sel) - 0d, longjmp. */
4102	DECL_NO_RETURN(void) iemRaiseSelectorInvalidAccessJmp(PVMCPUCC pVCpu, uint32_t iSegReg, uint32_t fAccess) RT_NOEXCEPT
4103	{
4104	NOREF(iSegReg); NOREF(fAccess);
4105	iemRaiseXcptOrIntJmp(pVCpu, 0, X86_XCPT_GP, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR, 0, 0);
4106	}
4107	#endif
4108
4109
4110	/** \#PF(n) - 0e. */
4111	VBOXSTRICTRC iemRaisePageFault(PVMCPUCC pVCpu, RTGCPTR GCPtrWhere, uint32_t fAccess, int rc) RT_NOEXCEPT
4112	{
4113	uint16_t uErr;
4114	switch (rc)
4115	{
4116	case VERR_PAGE_NOT_PRESENT:
4117	case VERR_PAGE_TABLE_NOT_PRESENT:
4118	case VERR_PAGE_DIRECTORY_PTR_NOT_PRESENT:
4119	case VERR_PAGE_MAP_LEVEL4_NOT_PRESENT:
4120	uErr = 0;
4121	break;
4122
4123	default:
4124	AssertMsgFailed(("%Rrc\n", rc));
4125	RT_FALL_THRU();
4126	case VERR_ACCESS_DENIED:
4127	uErr = X86_TRAP_PF_P;
4128	break;
4129
4130	/** @todo reserved */
4131	}
4132
4133	if (pVCpu->iem.s.uCpl == 3)
4134	uErr \|= X86_TRAP_PF_US;
4135
4136	if ( (fAccess & IEM_ACCESS_WHAT_MASK) == IEM_ACCESS_WHAT_CODE
4137	&& ( (pVCpu->cpum.GstCtx.cr4 & X86_CR4_PAE)
4138	&& (pVCpu->cpum.GstCtx.msrEFER & MSR_K6_EFER_NXE) ) )
4139	uErr \|= X86_TRAP_PF_ID;
4140
4141	#if 0 /* This is so much non-sense, really. Why was it done like that? */
4142	/* Note! RW access callers reporting a WRITE protection fault, will clear
4143	the READ flag before calling. So, read-modify-write accesses (RW)
4144	can safely be reported as READ faults. */
4145	if ((fAccess & (IEM_ACCESS_TYPE_WRITE \| IEM_ACCESS_TYPE_READ)) == IEM_ACCESS_TYPE_WRITE)
4146	uErr \|= X86_TRAP_PF_RW;
4147	#else
4148	if (fAccess & IEM_ACCESS_TYPE_WRITE)
4149	{
4150	/// @todo r=bird: bs3-cpu-basic-2 wants X86_TRAP_PF_RW for xchg and cmpxchg
4151	/// (regardless of outcome of the comparison in the latter case).
4152	//if (!(fAccess & IEM_ACCESS_TYPE_READ))
4153	uErr \|= X86_TRAP_PF_RW;
4154	}
4155	#endif
4156
4157	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_PF, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR \| IEM_XCPT_FLAGS_CR2,
4158	uErr, GCPtrWhere);
4159	}
4160
4161	#ifdef IEM_WITH_SETJMP
4162	/** \#PF(n) - 0e, longjmp. */
4163	DECL_NO_RETURN(void) iemRaisePageFaultJmp(PVMCPUCC pVCpu, RTGCPTR GCPtrWhere, uint32_t fAccess, int rc) RT_NOEXCEPT
4164	{
4165	longjmp(*CTX_SUFF(pVCpu->iem.s.pJmpBuf), VBOXSTRICTRC_VAL(iemRaisePageFault(pVCpu, GCPtrWhere, fAccess, rc)));
4166	}
4167	#endif
4168
4169
4170	/** \#MF(0) - 10. */
4171	VBOXSTRICTRC iemRaiseMathFault(PVMCPUCC pVCpu)
4172	{
4173	if (pVCpu->cpum.GstCtx.cr0 & X86_CR0_NE)
4174	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_MF, IEM_XCPT_FLAGS_T_CPU_XCPT, 0, 0);
4175	else
4176	{
4177	/* Convert a #MF into a FERR -> IRQ 13. See @bugref{6117}. */
4178	PDMIsaSetIrq(pVCpu->CTX_SUFF(pVM), 13 /* u8Irq /, 1 / u8Level /, 0 / uTagSrc */);
4179	iemRegUpdateRipAndClearRF(pVCpu);
4180	return VINF_SUCCESS;
4181	}
4182	}
4183
4184
4185	/** \#AC(0) - 11. */
4186	VBOXSTRICTRC iemRaiseAlignmentCheckException(PVMCPUCC pVCpu)
4187	{
4188	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_AC, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR, 0, 0);
4189	}
4190
4191	#ifdef IEM_WITH_SETJMP
4192	/** \#AC(0) - 11, longjmp. */
4193	DECL_NO_RETURN(void) iemRaiseAlignmentCheckExceptionJmp(PVMCPUCC pVCpu) RT_NOEXCEPT
4194	{
4195	longjmp(*CTX_SUFF(pVCpu->iem.s.pJmpBuf), VBOXSTRICTRC_VAL(iemRaiseAlignmentCheckException(pVCpu)));
4196	}
4197	#endif
4198
4199
4200	/** \#XF(0)/\#XM(0) - 19. */
4201	VBOXSTRICTRC iemRaiseSimdFpException(PVMCPUCC pVCpu) RT_NOEXCEPT
4202	{
4203	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_XF, IEM_XCPT_FLAGS_T_CPU_XCPT, 0, 0);
4204	}
4205
4206
4207	/** Accessed via IEMOP_RAISE_DIVIDE_ERROR. */
4208	IEM_CIMPL_DEF_0(iemCImplRaiseDivideError)
4209	{
4210	NOREF(cbInstr);
4211	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_DE, IEM_XCPT_FLAGS_T_CPU_XCPT, 0, 0);
4212	}
4213
4214
4215	/** Accessed via IEMOP_RAISE_INVALID_LOCK_PREFIX. */
4216	IEM_CIMPL_DEF_0(iemCImplRaiseInvalidLockPrefix)
4217	{
4218	NOREF(cbInstr);
4219	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_UD, IEM_XCPT_FLAGS_T_CPU_XCPT, 0, 0);
4220	}
4221
4222
4223	/** Accessed via IEMOP_RAISE_INVALID_OPCODE. */
4224	IEM_CIMPL_DEF_0(iemCImplRaiseInvalidOpcode)
4225	{
4226	NOREF(cbInstr);
4227	return iemRaiseXcptOrInt(pVCpu, 0, X86_XCPT_UD, IEM_XCPT_FLAGS_T_CPU_XCPT, 0, 0);
4228	}
4229
4230
4231	/** @} */
4232
4233	/** @name Common opcode decoders.
4234	* @{
4235	*/
4236	//#include <iprt/mem.h>
4237
4238	/**
4239	* Used to add extra details about a stub case.
4240	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4241	*/
4242	void iemOpStubMsg2(PVMCPUCC pVCpu) RT_NOEXCEPT
4243	{
4244	#if defined(LOG_ENABLED) && defined(IN_RING3)
4245	PVM pVM = pVCpu->CTX_SUFF(pVM);
4246	char szRegs[4096];
4247	DBGFR3RegPrintf(pVM->pUVM, pVCpu->idCpu, &szRegs[0], sizeof(szRegs),
4248	"rax=%016VR{rax} rbx=%016VR{rbx} rcx=%016VR{rcx} rdx=%016VR{rdx}\n"
4249	"rsi=%016VR{rsi} rdi=%016VR{rdi} r8 =%016VR{r8} r9 =%016VR{r9}\n"
4250	"r10=%016VR{r10} r11=%016VR{r11} r12=%016VR{r12} r13=%016VR{r13}\n"
4251	"r14=%016VR{r14} r15=%016VR{r15} %VRF{rflags}\n"
4252	"rip=%016VR{rip} rsp=%016VR{rsp} rbp=%016VR{rbp}\n"
4253	"cs={%04VR{cs} base=%016VR{cs_base} limit=%08VR{cs_lim} flags=%04VR{cs_attr}} cr0=%016VR{cr0}\n"
4254	"ds={%04VR{ds} base=%016VR{ds_base} limit=%08VR{ds_lim} flags=%04VR{ds_attr}} cr2=%016VR{cr2}\n"
4255	"es={%04VR{es} base=%016VR{es_base} limit=%08VR{es_lim} flags=%04VR{es_attr}} cr3=%016VR{cr3}\n"
4256	"fs={%04VR{fs} base=%016VR{fs_base} limit=%08VR{fs_lim} flags=%04VR{fs_attr}} cr4=%016VR{cr4}\n"
4257	"gs={%04VR{gs} base=%016VR{gs_base} limit=%08VR{gs_lim} flags=%04VR{gs_attr}} cr8=%016VR{cr8}\n"
4258	"ss={%04VR{ss} base=%016VR{ss_base} limit=%08VR{ss_lim} flags=%04VR{ss_attr}}\n"
4259	"dr0=%016VR{dr0} dr1=%016VR{dr1} dr2=%016VR{dr2} dr3=%016VR{dr3}\n"
4260	"dr6=%016VR{dr6} dr7=%016VR{dr7}\n"
4261	"gdtr=%016VR{gdtr_base}:%04VR{gdtr_lim} idtr=%016VR{idtr_base}:%04VR{idtr_lim} rflags=%08VR{rflags}\n"
4262	"ldtr={%04VR{ldtr} base=%016VR{ldtr_base} limit=%08VR{ldtr_lim} flags=%08VR{ldtr_attr}}\n"
4263	"tr ={%04VR{tr} base=%016VR{tr_base} limit=%08VR{tr_lim} flags=%08VR{tr_attr}}\n"
4264	" sysenter={cs=%04VR{sysenter_cs} eip=%08VR{sysenter_eip} esp=%08VR{sysenter_esp}}\n"
4265	" efer=%016VR{efer}\n"
4266	" pat=%016VR{pat}\n"
4267	" sf_mask=%016VR{sf_mask}\n"
4268	"krnl_gs_base=%016VR{krnl_gs_base}\n"
4269	" lstar=%016VR{lstar}\n"
4270	" star=%016VR{star} cstar=%016VR{cstar}\n"
4271	"fcw=%04VR{fcw} fsw=%04VR{fsw} ftw=%04VR{ftw} mxcsr=%04VR{mxcsr} mxcsr_mask=%04VR{mxcsr_mask}\n"
4272	);
4273
4274	char szInstr[256];
4275	DBGFR3DisasInstrEx(pVM->pUVM, pVCpu->idCpu, 0, 0,
4276	DBGF_DISAS_FLAGS_CURRENT_GUEST \| DBGF_DISAS_FLAGS_DEFAULT_MODE,
4277	szInstr, sizeof(szInstr), NULL);
4278
4279	RTAssertMsg2Weak("%s%s\n", szRegs, szInstr);
4280	#else
4281	RTAssertMsg2Weak("cs:rip=%04x:%RX64\n", pVCpu->cpum.GstCtx.cs, pVCpu->cpum.GstCtx.rip);
4282	#endif
4283	}
4284
4285	/** @} */
4286
4287
4288
4289	/** @name Register Access.
4290	* @{
4291	*/
4292
4293	/**
4294	* Adds a 8-bit signed jump offset to RIP/EIP/IP.
4295	*
4296	* May raise a \#GP(0) if the new RIP is non-canonical or outside the code
4297	* segment limit.
4298	*
4299	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4300	* @param offNextInstr The offset of the next instruction.
4301	*/
4302	VBOXSTRICTRC iemRegRipRelativeJumpS8(PVMCPUCC pVCpu, int8_t offNextInstr) RT_NOEXCEPT
4303	{
4304	switch (pVCpu->iem.s.enmEffOpSize)
4305	{
4306	case IEMMODE_16BIT:
4307	{
4308	uint16_t uNewIp = pVCpu->cpum.GstCtx.ip + offNextInstr + IEM_GET_INSTR_LEN(pVCpu);
4309	if ( uNewIp > pVCpu->cpum.GstCtx.cs.u32Limit
4310	&& pVCpu->iem.s.enmCpuMode != IEMMODE_64BIT) /* no need to check for non-canonical. */
4311	return iemRaiseGeneralProtectionFault0(pVCpu);
4312	pVCpu->cpum.GstCtx.rip = uNewIp;
4313	break;
4314	}
4315
4316	case IEMMODE_32BIT:
4317	{
4318	Assert(pVCpu->cpum.GstCtx.rip <= UINT32_MAX);
4319	Assert(pVCpu->iem.s.enmCpuMode != IEMMODE_64BIT);
4320
4321	uint32_t uNewEip = pVCpu->cpum.GstCtx.eip + offNextInstr + IEM_GET_INSTR_LEN(pVCpu);
4322	if (uNewEip > pVCpu->cpum.GstCtx.cs.u32Limit)
4323	return iemRaiseGeneralProtectionFault0(pVCpu);
4324	pVCpu->cpum.GstCtx.rip = uNewEip;
4325	break;
4326	}
4327
4328	case IEMMODE_64BIT:
4329	{
4330	Assert(pVCpu->iem.s.enmCpuMode == IEMMODE_64BIT);
4331
4332	uint64_t uNewRip = pVCpu->cpum.GstCtx.rip + offNextInstr + IEM_GET_INSTR_LEN(pVCpu);
4333	if (!IEM_IS_CANONICAL(uNewRip))
4334	return iemRaiseGeneralProtectionFault0(pVCpu);
4335	pVCpu->cpum.GstCtx.rip = uNewRip;
4336	break;
4337	}
4338
4339	IEM_NOT_REACHED_DEFAULT_CASE_RET();
4340	}
4341
4342	pVCpu->cpum.GstCtx.eflags.Bits.u1RF = 0;
4343
4344	#ifndef IEM_WITH_CODE_TLB
4345	/* Flush the prefetch buffer. */
4346	pVCpu->iem.s.cbOpcode = IEM_GET_INSTR_LEN(pVCpu);
4347	#endif
4348
4349	return VINF_SUCCESS;
4350	}
4351
4352
4353	/**
4354	* Adds a 16-bit signed jump offset to RIP/EIP/IP.
4355	*
4356	* May raise a \#GP(0) if the new RIP is non-canonical or outside the code
4357	* segment limit.
4358	*
4359	* @returns Strict VBox status code.
4360	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4361	* @param offNextInstr The offset of the next instruction.
4362	*/
4363	VBOXSTRICTRC iemRegRipRelativeJumpS16(PVMCPUCC pVCpu, int16_t offNextInstr) RT_NOEXCEPT
4364	{
4365	Assert(pVCpu->iem.s.enmEffOpSize == IEMMODE_16BIT);
4366
4367	uint16_t uNewIp = pVCpu->cpum.GstCtx.ip + offNextInstr + IEM_GET_INSTR_LEN(pVCpu);
4368	if ( uNewIp > pVCpu->cpum.GstCtx.cs.u32Limit
4369	&& pVCpu->iem.s.enmCpuMode != IEMMODE_64BIT) /* no need to check for non-canonical. */
4370	return iemRaiseGeneralProtectionFault0(pVCpu);
4371	/** @todo Test 16-bit jump in 64-bit mode. possible? */
4372	pVCpu->cpum.GstCtx.rip = uNewIp;
4373	pVCpu->cpum.GstCtx.eflags.Bits.u1RF = 0;
4374
4375	#ifndef IEM_WITH_CODE_TLB
4376	/* Flush the prefetch buffer. */
4377	pVCpu->iem.s.cbOpcode = IEM_GET_INSTR_LEN(pVCpu);
4378	#endif
4379
4380	return VINF_SUCCESS;
4381	}
4382
4383
4384	/**
4385	* Adds a 32-bit signed jump offset to RIP/EIP/IP.
4386	*
4387	* May raise a \#GP(0) if the new RIP is non-canonical or outside the code
4388	* segment limit.
4389	*
4390	* @returns Strict VBox status code.
4391	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4392	* @param offNextInstr The offset of the next instruction.
4393	*/
4394	VBOXSTRICTRC iemRegRipRelativeJumpS32(PVMCPUCC pVCpu, int32_t offNextInstr) RT_NOEXCEPT
4395	{
4396	Assert(pVCpu->iem.s.enmEffOpSize != IEMMODE_16BIT);
4397
4398	if (pVCpu->iem.s.enmEffOpSize == IEMMODE_32BIT)
4399	{
4400	Assert(pVCpu->cpum.GstCtx.rip <= UINT32_MAX); Assert(pVCpu->iem.s.enmCpuMode != IEMMODE_64BIT);
4401
4402	uint32_t uNewEip = pVCpu->cpum.GstCtx.eip + offNextInstr + IEM_GET_INSTR_LEN(pVCpu);
4403	if (uNewEip > pVCpu->cpum.GstCtx.cs.u32Limit)
4404	return iemRaiseGeneralProtectionFault0(pVCpu);
4405	pVCpu->cpum.GstCtx.rip = uNewEip;
4406	}
4407	else
4408	{
4409	Assert(pVCpu->iem.s.enmCpuMode == IEMMODE_64BIT);
4410
4411	uint64_t uNewRip = pVCpu->cpum.GstCtx.rip + offNextInstr + IEM_GET_INSTR_LEN(pVCpu);
4412	if (!IEM_IS_CANONICAL(uNewRip))
4413	return iemRaiseGeneralProtectionFault0(pVCpu);
4414	pVCpu->cpum.GstCtx.rip = uNewRip;
4415	}
4416	pVCpu->cpum.GstCtx.eflags.Bits.u1RF = 0;
4417
4418	#ifndef IEM_WITH_CODE_TLB
4419	/* Flush the prefetch buffer. */
4420	pVCpu->iem.s.cbOpcode = IEM_GET_INSTR_LEN(pVCpu);
4421	#endif
4422
4423	return VINF_SUCCESS;
4424	}
4425
4426
4427	/**
4428	* Performs a near jump to the specified address.
4429	*
4430	* May raise a \#GP(0) if the new RIP is non-canonical or outside the code
4431	* segment limit.
4432	*
4433	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4434	* @param uNewRip The new RIP value.
4435	*/
4436	VBOXSTRICTRC iemRegRipJump(PVMCPUCC pVCpu, uint64_t uNewRip) RT_NOEXCEPT
4437	{
4438	switch (pVCpu->iem.s.enmEffOpSize)
4439	{
4440	case IEMMODE_16BIT:
4441	{
4442	Assert(uNewRip <= UINT16_MAX);
4443	if ( uNewRip > pVCpu->cpum.GstCtx.cs.u32Limit
4444	&& pVCpu->iem.s.enmCpuMode != IEMMODE_64BIT) /* no need to check for non-canonical. */
4445	return iemRaiseGeneralProtectionFault0(pVCpu);
4446	/** @todo Test 16-bit jump in 64-bit mode. */
4447	pVCpu->cpum.GstCtx.rip = uNewRip;
4448	break;
4449	}
4450
4451	case IEMMODE_32BIT:
4452	{
4453	Assert(uNewRip <= UINT32_MAX);
4454	Assert(pVCpu->cpum.GstCtx.rip <= UINT32_MAX);
4455	Assert(pVCpu->iem.s.enmCpuMode != IEMMODE_64BIT);
4456
4457	if (uNewRip > pVCpu->cpum.GstCtx.cs.u32Limit)
4458	return iemRaiseGeneralProtectionFault0(pVCpu);
4459	pVCpu->cpum.GstCtx.rip = uNewRip;
4460	break;
4461	}
4462
4463	case IEMMODE_64BIT:
4464	{
4465	Assert(pVCpu->iem.s.enmCpuMode == IEMMODE_64BIT);
4466
4467	if (!IEM_IS_CANONICAL(uNewRip))
4468	return iemRaiseGeneralProtectionFault0(pVCpu);
4469	pVCpu->cpum.GstCtx.rip = uNewRip;
4470	break;
4471	}
4472
4473	IEM_NOT_REACHED_DEFAULT_CASE_RET();
4474	}
4475
4476	pVCpu->cpum.GstCtx.eflags.Bits.u1RF = 0;
4477
4478	#ifndef IEM_WITH_CODE_TLB
4479	/* Flush the prefetch buffer. */
4480	pVCpu->iem.s.cbOpcode = IEM_GET_INSTR_LEN(pVCpu);
4481	#endif
4482
4483	return VINF_SUCCESS;
4484	}
4485
4486	/** @} */
4487
4488
4489	/** @name FPU access and helpers.
4490	*
4491	* @{
4492	*/
4493
4494	/**
4495	* Updates the x87.DS and FPUDP registers.
4496	*
4497	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4498	* @param pFpuCtx The FPU context.
4499	* @param iEffSeg The effective segment register.
4500	* @param GCPtrEff The effective address relative to @a iEffSeg.
4501	*/
4502	DECLINLINE(void) iemFpuUpdateDP(PVMCPUCC pVCpu, PX86FXSTATE pFpuCtx, uint8_t iEffSeg, RTGCPTR GCPtrEff)
4503	{
4504	RTSEL sel;
4505	switch (iEffSeg)
4506	{
4507	case X86_SREG_DS: sel = pVCpu->cpum.GstCtx.ds.Sel; break;
4508	case X86_SREG_SS: sel = pVCpu->cpum.GstCtx.ss.Sel; break;
4509	case X86_SREG_CS: sel = pVCpu->cpum.GstCtx.cs.Sel; break;
4510	case X86_SREG_ES: sel = pVCpu->cpum.GstCtx.es.Sel; break;
4511	case X86_SREG_FS: sel = pVCpu->cpum.GstCtx.fs.Sel; break;
4512	case X86_SREG_GS: sel = pVCpu->cpum.GstCtx.gs.Sel; break;
4513	default:
4514	AssertMsgFailed(("%d\n", iEffSeg));
4515	sel = pVCpu->cpum.GstCtx.ds.Sel;
4516	}
4517	/** @todo pFpuCtx->DS and FPUDP needs to be kept seperately. */
4518	if (IEM_IS_REAL_OR_V86_MODE(pVCpu))
4519	{
4520	pFpuCtx->DS = 0;
4521	pFpuCtx->FPUDP = (uint32_t)GCPtrEff + ((uint32_t)sel << 4);
4522	}
4523	else if (!IEM_IS_LONG_MODE(pVCpu))
4524	{
4525	pFpuCtx->DS = sel;
4526	pFpuCtx->FPUDP = GCPtrEff;
4527	}
4528	else
4529	(uint64_t )&pFpuCtx->FPUDP = GCPtrEff;
4530	}
4531
4532
4533	/**
4534	* Rotates the stack registers in the push direction.
4535	*
4536	* @param pFpuCtx The FPU context.
4537	* @remarks This is a complete waste of time, but fxsave stores the registers in
4538	* stack order.
4539	*/
4540	DECLINLINE(void) iemFpuRotateStackPush(PX86FXSTATE pFpuCtx)
4541	{
4542	RTFLOAT80U r80Tmp = pFpuCtx->aRegs[7].r80;
4543	pFpuCtx->aRegs[7].r80 = pFpuCtx->aRegs[6].r80;
4544	pFpuCtx->aRegs[6].r80 = pFpuCtx->aRegs[5].r80;
4545	pFpuCtx->aRegs[5].r80 = pFpuCtx->aRegs[4].r80;
4546	pFpuCtx->aRegs[4].r80 = pFpuCtx->aRegs[3].r80;
4547	pFpuCtx->aRegs[3].r80 = pFpuCtx->aRegs[2].r80;
4548	pFpuCtx->aRegs[2].r80 = pFpuCtx->aRegs[1].r80;
4549	pFpuCtx->aRegs[1].r80 = pFpuCtx->aRegs[0].r80;
4550	pFpuCtx->aRegs[0].r80 = r80Tmp;
4551	}
4552
4553
4554	/**
4555	* Rotates the stack registers in the pop direction.
4556	*
4557	* @param pFpuCtx The FPU context.
4558	* @remarks This is a complete waste of time, but fxsave stores the registers in
4559	* stack order.
4560	*/
4561	DECLINLINE(void) iemFpuRotateStackPop(PX86FXSTATE pFpuCtx)
4562	{
4563	RTFLOAT80U r80Tmp = pFpuCtx->aRegs[0].r80;
4564	pFpuCtx->aRegs[0].r80 = pFpuCtx->aRegs[1].r80;
4565	pFpuCtx->aRegs[1].r80 = pFpuCtx->aRegs[2].r80;
4566	pFpuCtx->aRegs[2].r80 = pFpuCtx->aRegs[3].r80;
4567	pFpuCtx->aRegs[3].r80 = pFpuCtx->aRegs[4].r80;
4568	pFpuCtx->aRegs[4].r80 = pFpuCtx->aRegs[5].r80;
4569	pFpuCtx->aRegs[5].r80 = pFpuCtx->aRegs[6].r80;
4570	pFpuCtx->aRegs[6].r80 = pFpuCtx->aRegs[7].r80;
4571	pFpuCtx->aRegs[7].r80 = r80Tmp;
4572	}
4573
4574
4575	/**
4576	* Updates FSW and pushes a FPU result onto the FPU stack if no pending
4577	* exception prevents it.
4578	*
4579	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4580	* @param pResult The FPU operation result to push.
4581	* @param pFpuCtx The FPU context.
4582	*/
4583	static void iemFpuMaybePushResult(PVMCPU pVCpu, PIEMFPURESULT pResult, PX86FXSTATE pFpuCtx) RT_NOEXCEPT
4584	{
4585	/* Update FSW and bail if there are pending exceptions afterwards. */
4586	uint16_t fFsw = pFpuCtx->FSW & ~X86_FSW_C_MASK;
4587	fFsw \|= pResult->FSW & ~X86_FSW_TOP_MASK;
4588	if ( (fFsw & (X86_FSW_IE \| X86_FSW_ZE \| X86_FSW_DE))
4589	& ~(pFpuCtx->FCW & (X86_FCW_IM \| X86_FCW_ZM \| X86_FCW_DM)))
4590	{
4591	if ((fFsw & X86_FSW_ES) && !(pFpuCtx->FCW & X86_FSW_ES))
4592	Log11(("iemFpuMaybePushResult: %04x:%08RX64: FSW %#x -> %#x\n",
4593	pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, pFpuCtx->FSW, fFsw));
4594	pFpuCtx->FSW = fFsw;
4595	return;
4596	}
4597
4598	uint16_t iNewTop = (X86_FSW_TOP_GET(fFsw) + 7) & X86_FSW_TOP_SMASK;
4599	if (!(pFpuCtx->FTW & RT_BIT(iNewTop)))
4600	{
4601	/* All is fine, push the actual value. */
4602	pFpuCtx->FTW \|= RT_BIT(iNewTop);
4603	pFpuCtx->aRegs[7].r80 = pResult->r80Result;
4604	}
4605	else if (pFpuCtx->FCW & X86_FCW_IM)
4606	{
4607	/* Masked stack overflow, push QNaN. */
4608	fFsw \|= X86_FSW_IE \| X86_FSW_SF \| X86_FSW_C1;
4609	iemFpuStoreQNan(&pFpuCtx->aRegs[7].r80);
4610	}
4611	else
4612	{
4613	/* Raise stack overflow, don't push anything. */
4614	pFpuCtx->FSW \|= pResult->FSW & ~X86_FSW_C_MASK;
4615	pFpuCtx->FSW \|= X86_FSW_IE \| X86_FSW_SF \| X86_FSW_C1 \| X86_FSW_B \| X86_FSW_ES;
4616	Log11(("iemFpuMaybePushResult: %04x:%08RX64: stack overflow (FSW=%#x)\n",
4617	pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, pFpuCtx->FSW));
4618	return;
4619	}
4620
4621	fFsw &= ~X86_FSW_TOP_MASK;
4622	fFsw \|= iNewTop << X86_FSW_TOP_SHIFT;
4623	pFpuCtx->FSW = fFsw;
4624
4625	iemFpuRotateStackPush(pFpuCtx);
4626	RT_NOREF(pVCpu);
4627	}
4628
4629
4630	/**
4631	* Stores a result in a FPU register and updates the FSW and FTW.
4632	*
4633	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4634	* @param pFpuCtx The FPU context.
4635	* @param pResult The result to store.
4636	* @param iStReg Which FPU register to store it in.
4637	*/
4638	static void iemFpuStoreResultOnly(PVMCPU pVCpu, PX86FXSTATE pFpuCtx, PIEMFPURESULT pResult, uint8_t iStReg) RT_NOEXCEPT
4639	{
4640	Assert(iStReg < 8);
4641	uint16_t fNewFsw = pFpuCtx->FSW;
4642	uint16_t const iReg = (X86_FSW_TOP_GET(fNewFsw) + iStReg) & X86_FSW_TOP_SMASK;
4643	fNewFsw &= ~X86_FSW_C_MASK;
4644	fNewFsw \|= pResult->FSW & ~X86_FSW_TOP_MASK;
4645	if ((fNewFsw & X86_FSW_ES) && !(pFpuCtx->FSW & X86_FSW_ES))
4646	Log11(("iemFpuStoreResultOnly: %04x:%08RX64: FSW %#x -> %#x\n",
4647	pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, pFpuCtx->FSW, fNewFsw));
4648	pFpuCtx->FSW = fNewFsw;
4649	pFpuCtx->FTW \|= RT_BIT(iReg);
4650	pFpuCtx->aRegs[iStReg].r80 = pResult->r80Result;
4651	RT_NOREF(pVCpu);
4652	}
4653
4654
4655	/**
4656	* Only updates the FPU status word (FSW) with the result of the current
4657	* instruction.
4658	*
4659	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4660	* @param pFpuCtx The FPU context.
4661	* @param u16FSW The FSW output of the current instruction.
4662	*/
4663	static void iemFpuUpdateFSWOnly(PVMCPU pVCpu, PX86FXSTATE pFpuCtx, uint16_t u16FSW) RT_NOEXCEPT
4664	{
4665	uint16_t fNewFsw = pFpuCtx->FSW;
4666	fNewFsw &= ~X86_FSW_C_MASK;
4667	fNewFsw \|= u16FSW & ~X86_FSW_TOP_MASK;
4668	if ((fNewFsw & X86_FSW_ES) && !(pFpuCtx->FSW & X86_FSW_ES))
4669	Log11(("iemFpuStoreResultOnly: %04x:%08RX64: FSW %#x -> %#x\n",
4670	pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, pFpuCtx->FSW, fNewFsw));
4671	pFpuCtx->FSW = fNewFsw;
4672	RT_NOREF(pVCpu);
4673	}
4674
4675
4676	/**
4677	* Pops one item off the FPU stack if no pending exception prevents it.
4678	*
4679	* @param pFpuCtx The FPU context.
4680	*/
4681	static void iemFpuMaybePopOne(PX86FXSTATE pFpuCtx) RT_NOEXCEPT
4682	{
4683	/* Check pending exceptions. */
4684	uint16_t uFSW = pFpuCtx->FSW;
4685	if ( (pFpuCtx->FSW & (X86_FSW_IE \| X86_FSW_ZE \| X86_FSW_DE))
4686	& ~(pFpuCtx->FCW & (X86_FCW_IM \| X86_FCW_ZM \| X86_FCW_DM)))
4687	return;
4688
4689	/* TOP--. */
4690	uint16_t iOldTop = uFSW & X86_FSW_TOP_MASK;
4691	uFSW &= ~X86_FSW_TOP_MASK;
4692	uFSW \|= (iOldTop + (UINT16_C(9) << X86_FSW_TOP_SHIFT)) & X86_FSW_TOP_MASK;
4693	pFpuCtx->FSW = uFSW;
4694
4695	/* Mark the previous ST0 as empty. */
4696	iOldTop >>= X86_FSW_TOP_SHIFT;
4697	pFpuCtx->FTW &= ~RT_BIT(iOldTop);
4698
4699	/* Rotate the registers. */
4700	iemFpuRotateStackPop(pFpuCtx);
4701	}
4702
4703
4704	/**
4705	* Pushes a FPU result onto the FPU stack if no pending exception prevents it.
4706	*
4707	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4708	* @param pResult The FPU operation result to push.
4709	*/
4710	void iemFpuPushResult(PVMCPUCC pVCpu, PIEMFPURESULT pResult) RT_NOEXCEPT
4711	{
4712	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
4713	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
4714	iemFpuMaybePushResult(pVCpu, pResult, pFpuCtx);
4715	}
4716
4717
4718	/**
4719	* Pushes a FPU result onto the FPU stack if no pending exception prevents it,
4720	* and sets FPUDP and FPUDS.
4721	*
4722	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4723	* @param pResult The FPU operation result to push.
4724	* @param iEffSeg The effective segment register.
4725	* @param GCPtrEff The effective address relative to @a iEffSeg.
4726	*/
4727	void iemFpuPushResultWithMemOp(PVMCPUCC pVCpu, PIEMFPURESULT pResult, uint8_t iEffSeg, RTGCPTR GCPtrEff) RT_NOEXCEPT
4728	{
4729	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
4730	iemFpuUpdateDP(pVCpu, pFpuCtx, iEffSeg, GCPtrEff);
4731	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
4732	iemFpuMaybePushResult(pVCpu, pResult, pFpuCtx);
4733	}
4734
4735
4736	/**
4737	* Replace ST0 with the first value and push the second onto the FPU stack,
4738	* unless a pending exception prevents it.
4739	*
4740	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4741	* @param pResult The FPU operation result to store and push.
4742	*/
4743	void iemFpuPushResultTwo(PVMCPUCC pVCpu, PIEMFPURESULTTWO pResult) RT_NOEXCEPT
4744	{
4745	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
4746	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
4747
4748	/* Update FSW and bail if there are pending exceptions afterwards. */
4749	uint16_t fFsw = pFpuCtx->FSW & ~X86_FSW_C_MASK;
4750	fFsw \|= pResult->FSW & ~X86_FSW_TOP_MASK;
4751	if ( (fFsw & (X86_FSW_IE \| X86_FSW_ZE \| X86_FSW_DE))
4752	& ~(pFpuCtx->FCW & (X86_FCW_IM \| X86_FCW_ZM \| X86_FCW_DM)))
4753	{
4754	if ((fFsw & X86_FSW_ES) && !(pFpuCtx->FSW & X86_FSW_ES))
4755	Log11(("iemFpuPushResultTwo: %04x:%08RX64: FSW %#x -> %#x\n",
4756	pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, pFpuCtx->FSW, fFsw));
4757	pFpuCtx->FSW = fFsw;
4758	return;
4759	}
4760
4761	uint16_t iNewTop = (X86_FSW_TOP_GET(fFsw) + 7) & X86_FSW_TOP_SMASK;
4762	if (!(pFpuCtx->FTW & RT_BIT(iNewTop)))
4763	{
4764	/* All is fine, push the actual value. */
4765	pFpuCtx->FTW \|= RT_BIT(iNewTop);
4766	pFpuCtx->aRegs[0].r80 = pResult->r80Result1;
4767	pFpuCtx->aRegs[7].r80 = pResult->r80Result2;
4768	}
4769	else if (pFpuCtx->FCW & X86_FCW_IM)
4770	{
4771	/* Masked stack overflow, push QNaN. */
4772	fFsw \|= X86_FSW_IE \| X86_FSW_SF \| X86_FSW_C1;
4773	iemFpuStoreQNan(&pFpuCtx->aRegs[0].r80);
4774	iemFpuStoreQNan(&pFpuCtx->aRegs[7].r80);
4775	}
4776	else
4777	{
4778	/* Raise stack overflow, don't push anything. */
4779	pFpuCtx->FSW \|= pResult->FSW & ~X86_FSW_C_MASK;
4780	pFpuCtx->FSW \|= X86_FSW_IE \| X86_FSW_SF \| X86_FSW_C1 \| X86_FSW_B \| X86_FSW_ES;
4781	Log11(("iemFpuPushResultTwo: %04x:%08RX64: stack overflow (FSW=%#x)\n",
4782	pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, pFpuCtx->FSW));
4783	return;
4784	}
4785
4786	fFsw &= ~X86_FSW_TOP_MASK;
4787	fFsw \|= iNewTop << X86_FSW_TOP_SHIFT;
4788	pFpuCtx->FSW = fFsw;
4789
4790	iemFpuRotateStackPush(pFpuCtx);
4791	}
4792
4793
4794	/**
4795	* Stores a result in a FPU register, updates the FSW, FTW, FPUIP, FPUCS, and
4796	* FOP.
4797	*
4798	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4799	* @param pResult The result to store.
4800	* @param iStReg Which FPU register to store it in.
4801	*/
4802	void iemFpuStoreResult(PVMCPUCC pVCpu, PIEMFPURESULT pResult, uint8_t iStReg) RT_NOEXCEPT
4803	{
4804	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
4805	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
4806	iemFpuStoreResultOnly(pVCpu, pFpuCtx, pResult, iStReg);
4807	}
4808
4809
4810	/**
4811	* Stores a result in a FPU register, updates the FSW, FTW, FPUIP, FPUCS, and
4812	* FOP, and then pops the stack.
4813	*
4814	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4815	* @param pResult The result to store.
4816	* @param iStReg Which FPU register to store it in.
4817	*/
4818	void iemFpuStoreResultThenPop(PVMCPUCC pVCpu, PIEMFPURESULT pResult, uint8_t iStReg) RT_NOEXCEPT
4819	{
4820	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
4821	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
4822	iemFpuStoreResultOnly(pVCpu, pFpuCtx, pResult, iStReg);
4823	iemFpuMaybePopOne(pFpuCtx);
4824	}
4825
4826
4827	/**
4828	* Stores a result in a FPU register, updates the FSW, FTW, FPUIP, FPUCS, FOP,
4829	* FPUDP, and FPUDS.
4830	*
4831	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4832	* @param pResult The result to store.
4833	* @param iStReg Which FPU register to store it in.
4834	* @param iEffSeg The effective memory operand selector register.
4835	* @param GCPtrEff The effective memory operand offset.
4836	*/
4837	void iemFpuStoreResultWithMemOp(PVMCPUCC pVCpu, PIEMFPURESULT pResult, uint8_t iStReg,
4838	uint8_t iEffSeg, RTGCPTR GCPtrEff) RT_NOEXCEPT
4839	{
4840	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
4841	iemFpuUpdateDP(pVCpu, pFpuCtx, iEffSeg, GCPtrEff);
4842	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
4843	iemFpuStoreResultOnly(pVCpu, pFpuCtx, pResult, iStReg);
4844	}
4845
4846
4847	/**
4848	* Stores a result in a FPU register, updates the FSW, FTW, FPUIP, FPUCS, FOP,
4849	* FPUDP, and FPUDS, and then pops the stack.
4850	*
4851	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4852	* @param pResult The result to store.
4853	* @param iStReg Which FPU register to store it in.
4854	* @param iEffSeg The effective memory operand selector register.
4855	* @param GCPtrEff The effective memory operand offset.
4856	*/
4857	void iemFpuStoreResultWithMemOpThenPop(PVMCPUCC pVCpu, PIEMFPURESULT pResult,
4858	uint8_t iStReg, uint8_t iEffSeg, RTGCPTR GCPtrEff) RT_NOEXCEPT
4859	{
4860	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
4861	iemFpuUpdateDP(pVCpu, pFpuCtx, iEffSeg, GCPtrEff);
4862	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
4863	iemFpuStoreResultOnly(pVCpu, pFpuCtx, pResult, iStReg);
4864	iemFpuMaybePopOne(pFpuCtx);
4865	}
4866
4867
4868	/**
4869	* Updates the FOP, FPUIP, and FPUCS. For FNOP.
4870	*
4871	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4872	*/
4873	void iemFpuUpdateOpcodeAndIp(PVMCPUCC pVCpu) RT_NOEXCEPT
4874	{
4875	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
4876	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
4877	}
4878
4879
4880	/**
4881	* Updates the FSW, FOP, FPUIP, and FPUCS.
4882	*
4883	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4884	* @param u16FSW The FSW from the current instruction.
4885	*/
4886	void iemFpuUpdateFSW(PVMCPUCC pVCpu, uint16_t u16FSW) RT_NOEXCEPT
4887	{
4888	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
4889	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
4890	iemFpuUpdateFSWOnly(pVCpu, pFpuCtx, u16FSW);
4891	}
4892
4893
4894	/**
4895	* Updates the FSW, FOP, FPUIP, and FPUCS, then pops the stack.
4896	*
4897	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4898	* @param u16FSW The FSW from the current instruction.
4899	*/
4900	void iemFpuUpdateFSWThenPop(PVMCPUCC pVCpu, uint16_t u16FSW) RT_NOEXCEPT
4901	{
4902	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
4903	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
4904	iemFpuUpdateFSWOnly(pVCpu, pFpuCtx, u16FSW);
4905	iemFpuMaybePopOne(pFpuCtx);
4906	}
4907
4908
4909	/**
4910	* Updates the FSW, FOP, FPUIP, FPUCS, FPUDP, and FPUDS.
4911	*
4912	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4913	* @param u16FSW The FSW from the current instruction.
4914	* @param iEffSeg The effective memory operand selector register.
4915	* @param GCPtrEff The effective memory operand offset.
4916	*/
4917	void iemFpuUpdateFSWWithMemOp(PVMCPUCC pVCpu, uint16_t u16FSW, uint8_t iEffSeg, RTGCPTR GCPtrEff) RT_NOEXCEPT
4918	{
4919	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
4920	iemFpuUpdateDP(pVCpu, pFpuCtx, iEffSeg, GCPtrEff);
4921	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
4922	iemFpuUpdateFSWOnly(pVCpu, pFpuCtx, u16FSW);
4923	}
4924
4925
4926	/**
4927	* Updates the FSW, FOP, FPUIP, and FPUCS, then pops the stack twice.
4928	*
4929	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4930	* @param u16FSW The FSW from the current instruction.
4931	*/
4932	void iemFpuUpdateFSWThenPopPop(PVMCPUCC pVCpu, uint16_t u16FSW) RT_NOEXCEPT
4933	{
4934	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
4935	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
4936	iemFpuUpdateFSWOnly(pVCpu, pFpuCtx, u16FSW);
4937	iemFpuMaybePopOne(pFpuCtx);
4938	iemFpuMaybePopOne(pFpuCtx);
4939	}
4940
4941
4942	/**
4943	* Updates the FSW, FOP, FPUIP, FPUCS, FPUDP, and FPUDS, then pops the stack.
4944	*
4945	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4946	* @param u16FSW The FSW from the current instruction.
4947	* @param iEffSeg The effective memory operand selector register.
4948	* @param GCPtrEff The effective memory operand offset.
4949	*/
4950	void iemFpuUpdateFSWWithMemOpThenPop(PVMCPUCC pVCpu, uint16_t u16FSW, uint8_t iEffSeg, RTGCPTR GCPtrEff) RT_NOEXCEPT
4951	{
4952	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
4953	iemFpuUpdateDP(pVCpu, pFpuCtx, iEffSeg, GCPtrEff);
4954	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
4955	iemFpuUpdateFSWOnly(pVCpu, pFpuCtx, u16FSW);
4956	iemFpuMaybePopOne(pFpuCtx);
4957	}
4958
4959
4960	/**
4961	* Worker routine for raising an FPU stack underflow exception.
4962	*
4963	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4964	* @param pFpuCtx The FPU context.
4965	* @param iStReg The stack register being accessed.
4966	*/
4967	static void iemFpuStackUnderflowOnly(PVMCPU pVCpu, PX86FXSTATE pFpuCtx, uint8_t iStReg)
4968	{
4969	Assert(iStReg < 8 \|\| iStReg == UINT8_MAX);
4970	if (pFpuCtx->FCW & X86_FCW_IM)
4971	{
4972	/* Masked underflow. */
4973	pFpuCtx->FSW &= ~X86_FSW_C_MASK;
4974	pFpuCtx->FSW \|= X86_FSW_IE \| X86_FSW_SF;
4975	uint16_t iReg = (X86_FSW_TOP_GET(pFpuCtx->FSW) + iStReg) & X86_FSW_TOP_SMASK;
4976	if (iStReg != UINT8_MAX)
4977	{
4978	pFpuCtx->FTW \|= RT_BIT(iReg);
4979	iemFpuStoreQNan(&pFpuCtx->aRegs[iStReg].r80);
4980	}
4981	}
4982	else
4983	{
4984	pFpuCtx->FSW &= ~X86_FSW_C_MASK;
4985	pFpuCtx->FSW \|= X86_FSW_IE \| X86_FSW_SF \| X86_FSW_ES \| X86_FSW_B;
4986	Log11(("iemFpuStackUnderflowOnly: %04x:%08RX64: underflow (FSW=%#x)\n",
4987	pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, pFpuCtx->FSW));
4988	}
4989	RT_NOREF(pVCpu);
4990	}
4991
4992
4993	/**
4994	* Raises a FPU stack underflow exception.
4995	*
4996	* @param pVCpu The cross context virtual CPU structure of the calling thread.
4997	* @param iStReg The destination register that should be loaded
4998	* with QNaN if \#IS is not masked. Specify
4999	* UINT8_MAX if none (like for fcom).
5000	*/
5001	void iemFpuStackUnderflow(PVMCPUCC pVCpu, uint8_t iStReg) RT_NOEXCEPT
5002	{
5003	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
5004	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
5005	iemFpuStackUnderflowOnly(pVCpu, pFpuCtx, iStReg);
5006	}
5007
5008
5009	void iemFpuStackUnderflowWithMemOp(PVMCPUCC pVCpu, uint8_t iStReg, uint8_t iEffSeg, RTGCPTR GCPtrEff) RT_NOEXCEPT
5010	{
5011	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
5012	iemFpuUpdateDP(pVCpu, pFpuCtx, iEffSeg, GCPtrEff);
5013	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
5014	iemFpuStackUnderflowOnly(pVCpu, pFpuCtx, iStReg);
5015	}
5016
5017
5018	void iemFpuStackUnderflowThenPop(PVMCPUCC pVCpu, uint8_t iStReg) RT_NOEXCEPT
5019	{
5020	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
5021	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
5022	iemFpuStackUnderflowOnly(pVCpu, pFpuCtx, iStReg);
5023	iemFpuMaybePopOne(pFpuCtx);
5024	}
5025
5026
5027	void iemFpuStackUnderflowWithMemOpThenPop(PVMCPUCC pVCpu, uint8_t iStReg, uint8_t iEffSeg, RTGCPTR GCPtrEff) RT_NOEXCEPT
5028	{
5029	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
5030	iemFpuUpdateDP(pVCpu, pFpuCtx, iEffSeg, GCPtrEff);
5031	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
5032	iemFpuStackUnderflowOnly(pVCpu, pFpuCtx, iStReg);
5033	iemFpuMaybePopOne(pFpuCtx);
5034	}
5035
5036
5037	void iemFpuStackUnderflowThenPopPop(PVMCPUCC pVCpu) RT_NOEXCEPT
5038	{
5039	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
5040	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
5041	iemFpuStackUnderflowOnly(pVCpu, pFpuCtx, UINT8_MAX);
5042	iemFpuMaybePopOne(pFpuCtx);
5043	iemFpuMaybePopOne(pFpuCtx);
5044	}
5045
5046
5047	void iemFpuStackPushUnderflow(PVMCPUCC pVCpu) RT_NOEXCEPT
5048	{
5049	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
5050	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
5051
5052	if (pFpuCtx->FCW & X86_FCW_IM)
5053	{
5054	/* Masked overflow - Push QNaN. */
5055	uint16_t iNewTop = (X86_FSW_TOP_GET(pFpuCtx->FSW) + 7) & X86_FSW_TOP_SMASK;
5056	pFpuCtx->FSW &= ~(X86_FSW_TOP_MASK \| X86_FSW_C_MASK);
5057	pFpuCtx->FSW \|= X86_FSW_IE \| X86_FSW_SF;
5058	pFpuCtx->FSW \|= iNewTop << X86_FSW_TOP_SHIFT;
5059	pFpuCtx->FTW \|= RT_BIT(iNewTop);
5060	iemFpuStoreQNan(&pFpuCtx->aRegs[7].r80);
5061	iemFpuRotateStackPush(pFpuCtx);
5062	}
5063	else
5064	{
5065	/* Exception pending - don't change TOP or the register stack. */
5066	pFpuCtx->FSW &= ~X86_FSW_C_MASK;
5067	pFpuCtx->FSW \|= X86_FSW_IE \| X86_FSW_SF \| X86_FSW_ES \| X86_FSW_B;
5068	Log11(("iemFpuStackPushUnderflow: %04x:%08RX64: underflow (FSW=%#x)\n",
5069	pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, pFpuCtx->FSW));
5070	}
5071	}
5072
5073
5074	void iemFpuStackPushUnderflowTwo(PVMCPUCC pVCpu) RT_NOEXCEPT
5075	{
5076	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
5077	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
5078
5079	if (pFpuCtx->FCW & X86_FCW_IM)
5080	{
5081	/* Masked overflow - Push QNaN. */
5082	uint16_t iNewTop = (X86_FSW_TOP_GET(pFpuCtx->FSW) + 7) & X86_FSW_TOP_SMASK;
5083	pFpuCtx->FSW &= ~(X86_FSW_TOP_MASK \| X86_FSW_C_MASK);
5084	pFpuCtx->FSW \|= X86_FSW_IE \| X86_FSW_SF;
5085	pFpuCtx->FSW \|= iNewTop << X86_FSW_TOP_SHIFT;
5086	pFpuCtx->FTW \|= RT_BIT(iNewTop);
5087	iemFpuStoreQNan(&pFpuCtx->aRegs[0].r80);
5088	iemFpuStoreQNan(&pFpuCtx->aRegs[7].r80);
5089	iemFpuRotateStackPush(pFpuCtx);
5090	}
5091	else
5092	{
5093	/* Exception pending - don't change TOP or the register stack. */
5094	pFpuCtx->FSW &= ~X86_FSW_C_MASK;
5095	pFpuCtx->FSW \|= X86_FSW_IE \| X86_FSW_SF \| X86_FSW_ES \| X86_FSW_B;
5096	Log11(("iemFpuStackPushUnderflowTwo: %04x:%08RX64: underflow (FSW=%#x)\n",
5097	pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, pFpuCtx->FSW));
5098	}
5099	}
5100
5101
5102	/**
5103	* Worker routine for raising an FPU stack overflow exception on a push.
5104	*
5105	* @param pVCpu The cross context virtual CPU structure of the calling thread.
5106	* @param pFpuCtx The FPU context.
5107	*/
5108	static void iemFpuStackPushOverflowOnly(PVMCPU pVCpu, PX86FXSTATE pFpuCtx) RT_NOEXCEPT
5109	{
5110	if (pFpuCtx->FCW & X86_FCW_IM)
5111	{
5112	/* Masked overflow. */
5113	uint16_t iNewTop = (X86_FSW_TOP_GET(pFpuCtx->FSW) + 7) & X86_FSW_TOP_SMASK;
5114	pFpuCtx->FSW &= ~(X86_FSW_TOP_MASK \| X86_FSW_C_MASK);
5115	pFpuCtx->FSW \|= X86_FSW_C1 \| X86_FSW_IE \| X86_FSW_SF;
5116	pFpuCtx->FSW \|= iNewTop << X86_FSW_TOP_SHIFT;
5117	pFpuCtx->FTW \|= RT_BIT(iNewTop);
5118	iemFpuStoreQNan(&pFpuCtx->aRegs[7].r80);
5119	iemFpuRotateStackPush(pFpuCtx);
5120	}
5121	else
5122	{
5123	/* Exception pending - don't change TOP or the register stack. */
5124	pFpuCtx->FSW &= ~X86_FSW_C_MASK;
5125	pFpuCtx->FSW \|= X86_FSW_C1 \| X86_FSW_IE \| X86_FSW_SF \| X86_FSW_ES \| X86_FSW_B;
5126	Log11(("iemFpuStackPushOverflowOnly: %04x:%08RX64: overflow (FSW=%#x)\n",
5127	pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, pFpuCtx->FSW));
5128	}
5129	RT_NOREF(pVCpu);
5130	}
5131
5132
5133	/**
5134	* Raises a FPU stack overflow exception on a push.
5135	*
5136	* @param pVCpu The cross context virtual CPU structure of the calling thread.
5137	*/
5138	void iemFpuStackPushOverflow(PVMCPUCC pVCpu) RT_NOEXCEPT
5139	{
5140	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
5141	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
5142	iemFpuStackPushOverflowOnly(pVCpu, pFpuCtx);
5143	}
5144
5145
5146	/**
5147	* Raises a FPU stack overflow exception on a push with a memory operand.
5148	*
5149	* @param pVCpu The cross context virtual CPU structure of the calling thread.
5150	* @param iEffSeg The effective memory operand selector register.
5151	* @param GCPtrEff The effective memory operand offset.
5152	*/
5153	void iemFpuStackPushOverflowWithMemOp(PVMCPUCC pVCpu, uint8_t iEffSeg, RTGCPTR GCPtrEff) RT_NOEXCEPT
5154	{
5155	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
5156	iemFpuUpdateDP(pVCpu, pFpuCtx, iEffSeg, GCPtrEff);
5157	iemFpuUpdateOpcodeAndIpWorker(pVCpu, pFpuCtx);
5158	iemFpuStackPushOverflowOnly(pVCpu, pFpuCtx);
5159	}
5160
5161	/** @} */
5162
5163
5164	/** @name SSE+AVX SIMD access and helpers.
5165	*
5166	* @{
5167	*/
5168	/**
5169	* Stores a result in a SIMD XMM register, updates the MXCSR.
5170	*
5171	* @param pVCpu The cross context virtual CPU structure of the calling thread.
5172	* @param pResult The result to store.
5173	* @param iXmmReg Which SIMD XMM register to store the result in.
5174	*/
5175	void iemSseStoreResult(PVMCPUCC pVCpu, PCIEMSSERESULT pResult, uint8_t iXmmReg) RT_NOEXCEPT
5176	{
5177	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
5178	pFpuCtx->MXCSR \|= pResult->MXCSR & X86_MXCSR_XCPT_FLAGS;
5179
5180	/* The result is only updated if there is no unmasked exception pending. */
5181	if (( ~((pFpuCtx->MXCSR & X86_MXCSR_XCPT_MASK) >> X86_MXCSR_XCPT_MASK_SHIFT)
5182	& (pFpuCtx->MXCSR & X86_MXCSR_XCPT_FLAGS)) == 0)
5183	pVCpu->cpum.GstCtx.XState.x87.aXMM[iXmmReg] = pResult->uResult;
5184	}
5185
5186
5187	/**
5188	* Updates the MXCSR.
5189	*
5190	* @param pVCpu The cross context virtual CPU structure of the calling thread.
5191	* @param fMxcsr The new MXCSR value.
5192	*/
5193	void iemSseUpdateMxcsr(PVMCPUCC pVCpu, uint32_t fMxcsr) RT_NOEXCEPT
5194	{
5195	PX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
5196	pFpuCtx->MXCSR \|= fMxcsr & X86_MXCSR_XCPT_FLAGS;
5197	}
5198	/** @} */
5199
5200
5201	/** @name Memory access.
5202	*
5203	* @{
5204	*/
5205
5206
5207	/**
5208	* Updates the IEMCPU::cbWritten counter if applicable.
5209	*
5210	* @param pVCpu The cross context virtual CPU structure of the calling thread.
5211	* @param fAccess The access being accounted for.
5212	* @param cbMem The access size.
5213	*/
5214	DECL_FORCE_INLINE(void) iemMemUpdateWrittenCounter(PVMCPUCC pVCpu, uint32_t fAccess, size_t cbMem)
5215	{
5216	if ( (fAccess & (IEM_ACCESS_WHAT_MASK \| IEM_ACCESS_TYPE_WRITE)) == (IEM_ACCESS_WHAT_STACK \| IEM_ACCESS_TYPE_WRITE)
5217	\|\| (fAccess & (IEM_ACCESS_WHAT_MASK \| IEM_ACCESS_TYPE_WRITE)) == (IEM_ACCESS_WHAT_DATA \| IEM_ACCESS_TYPE_WRITE) )
5218	pVCpu->iem.s.cbWritten += (uint32_t)cbMem;
5219	}
5220
5221
5222	/**
5223	* Applies the segment limit, base and attributes.
5224	*
5225	* This may raise a \#GP or \#SS.
5226	*
5227	* @returns VBox strict status code.
5228	*
5229	* @param pVCpu The cross context virtual CPU structure of the calling thread.
5230	* @param fAccess The kind of access which is being performed.
5231	* @param iSegReg The index of the segment register to apply.
5232	* This is UINT8_MAX if none (for IDT, GDT, LDT,
5233	* TSS, ++).
5234	* @param cbMem The access size.
5235	* @param pGCPtrMem Pointer to the guest memory address to apply
5236	* segmentation to. Input and output parameter.
5237	*/
5238	VBOXSTRICTRC iemMemApplySegment(PVMCPUCC pVCpu, uint32_t fAccess, uint8_t iSegReg, size_t cbMem, PRTGCPTR pGCPtrMem) RT_NOEXCEPT
5239	{
5240	if (iSegReg == UINT8_MAX)
5241	return VINF_SUCCESS;
5242
5243	IEM_CTX_IMPORT_RET(pVCpu, CPUMCTX_EXTRN_SREG_FROM_IDX(iSegReg));
5244	PCPUMSELREGHID pSel = iemSRegGetHid(pVCpu, iSegReg);
5245	switch (pVCpu->iem.s.enmCpuMode)
5246	{
5247	case IEMMODE_16BIT:
5248	case IEMMODE_32BIT:
5249	{
5250	RTGCPTR32 GCPtrFirst32 = (RTGCPTR32)*pGCPtrMem;
5251	RTGCPTR32 GCPtrLast32 = GCPtrFirst32 + (uint32_t)cbMem - 1;
5252
5253	if ( pSel->Attr.n.u1Present
5254	&& !pSel->Attr.n.u1Unusable)
5255	{
5256	Assert(pSel->Attr.n.u1DescType);
5257	if (!(pSel->Attr.n.u4Type & X86_SEL_TYPE_CODE))
5258	{
5259	if ( (fAccess & IEM_ACCESS_TYPE_WRITE)
5260	&& !(pSel->Attr.n.u4Type & X86_SEL_TYPE_WRITE) )
5261	return iemRaiseSelectorInvalidAccess(pVCpu, iSegReg, fAccess);
5262
5263	if (!IEM_IS_REAL_OR_V86_MODE(pVCpu))
5264	{
5265	/** @todo CPL check. */
5266	}
5267
5268	/*
5269	* There are two kinds of data selectors, normal and expand down.
5270	*/
5271	if (!(pSel->Attr.n.u4Type & X86_SEL_TYPE_DOWN))
5272	{
5273	if ( GCPtrFirst32 > pSel->u32Limit
5274	\|\| GCPtrLast32 > pSel->u32Limit) /* yes, in real mode too (since 80286). */
5275	return iemRaiseSelectorBounds(pVCpu, iSegReg, fAccess);
5276	}
5277	else
5278	{
5279	/*
5280	* The upper boundary is defined by the B bit, not the G bit!
5281	*/
5282	if ( GCPtrFirst32 < pSel->u32Limit + UINT32_C(1)
5283	\|\| GCPtrLast32 > (pSel->Attr.n.u1DefBig ? UINT32_MAX : UINT32_C(0xffff)))
5284	return iemRaiseSelectorBounds(pVCpu, iSegReg, fAccess);
5285	}
5286	*pGCPtrMem = GCPtrFirst32 += (uint32_t)pSel->u64Base;
5287	}
5288	else
5289	{
5290	/*
5291	* Code selector and usually be used to read thru, writing is
5292	* only permitted in real and V8086 mode.
5293	*/
5294	if ( ( (fAccess & IEM_ACCESS_TYPE_WRITE)
5295	\|\| ( (fAccess & IEM_ACCESS_TYPE_READ)
5296	&& !(pSel->Attr.n.u4Type & X86_SEL_TYPE_READ)) )
5297	&& !IEM_IS_REAL_OR_V86_MODE(pVCpu) )
5298	return iemRaiseSelectorInvalidAccess(pVCpu, iSegReg, fAccess);
5299
5300	if ( GCPtrFirst32 > pSel->u32Limit
5301	\|\| GCPtrLast32 > pSel->u32Limit) /* yes, in real mode too (since 80286). */
5302	return iemRaiseSelectorBounds(pVCpu, iSegReg, fAccess);
5303
5304	if (!IEM_IS_REAL_OR_V86_MODE(pVCpu))
5305	{
5306	/** @todo CPL check. */
5307	}
5308
5309	*pGCPtrMem = GCPtrFirst32 += (uint32_t)pSel->u64Base;
5310	}
5311	}
5312	else
5313	return iemRaiseGeneralProtectionFault0(pVCpu);
5314	return VINF_SUCCESS;
5315	}
5316
5317	case IEMMODE_64BIT:
5318	{
5319	RTGCPTR GCPtrMem = *pGCPtrMem;
5320	if (iSegReg == X86_SREG_GS \|\| iSegReg == X86_SREG_FS)
5321	*pGCPtrMem = GCPtrMem + pSel->u64Base;
5322
5323	Assert(cbMem >= 1);
5324	if (RT_LIKELY(X86_IS_CANONICAL(GCPtrMem) && X86_IS_CANONICAL(GCPtrMem + cbMem - 1)))
5325	return VINF_SUCCESS;
5326	/** @todo We should probably raise \#SS(0) here if segment is SS; see AMD spec.
5327	* 4.12.2 "Data Limit Checks in 64-bit Mode". */
5328	return iemRaiseGeneralProtectionFault0(pVCpu);
5329	}
5330
5331	default:
5332	AssertFailedReturn(VERR_IEM_IPE_7);
5333	}
5334	}
5335
5336
5337	/**
5338	* Translates a virtual address to a physical physical address and checks if we
5339	* can access the page as specified.
5340	*
5341	* @param pVCpu The cross context virtual CPU structure of the calling thread.
5342	* @param GCPtrMem The virtual address.
5343	* @param fAccess The intended access.
5344	* @param pGCPhysMem Where to return the physical address.
5345	*/
5346	VBOXSTRICTRC iemMemPageTranslateAndCheckAccess(PVMCPUCC pVCpu, RTGCPTR GCPtrMem, uint32_t fAccess, PRTGCPHYS pGCPhysMem) RT_NOEXCEPT
5347	{
5348	/** @todo Need a different PGM interface here. We're currently using
5349	* generic / REM interfaces. this won't cut it for R0. */
5350	/** @todo If/when PGM handles paged real-mode, we can remove the hack in
5351	* iemSvmWorldSwitch/iemVmxWorldSwitch to work around raising a page-fault
5352	* here. */
5353	PGMPTWALK Walk;
5354	int rc = PGMGstGetPage(pVCpu, GCPtrMem, &Walk);
5355	if (RT_FAILURE(rc))
5356	{
5357	Log(("iemMemPageTranslateAndCheckAccess: GCPtrMem=%RGv - failed to fetch page -> #PF\n", GCPtrMem));
5358	/** @todo Check unassigned memory in unpaged mode. */
5359	/** @todo Reserved bits in page tables. Requires new PGM interface. */
5360	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
5361	if (Walk.fFailed & PGM_WALKFAIL_EPT)
5362	IEM_VMX_VMEXIT_EPT_RET(pVCpu, &Walk, fAccess, IEM_SLAT_FAIL_LINEAR_TO_PHYS_ADDR, 0 /* cbInstr */);
5363	#endif
5364	*pGCPhysMem = NIL_RTGCPHYS;
5365	return iemRaisePageFault(pVCpu, GCPtrMem, fAccess, rc);
5366	}
5367
5368	/* If the page is writable and does not have the no-exec bit set, all
5369	access is allowed. Otherwise we'll have to check more carefully... */
5370	if ((Walk.fEffective & (X86_PTE_RW \| X86_PTE_US \| X86_PTE_PAE_NX)) != (X86_PTE_RW \| X86_PTE_US))
5371	{
5372	/* Write to read only memory? */
5373	if ( (fAccess & IEM_ACCESS_TYPE_WRITE)
5374	&& !(Walk.fEffective & X86_PTE_RW)
5375	&& ( ( pVCpu->iem.s.uCpl == 3
5376	&& !(fAccess & IEM_ACCESS_WHAT_SYS))
5377	\|\| (pVCpu->cpum.GstCtx.cr0 & X86_CR0_WP)))
5378	{
5379	Log(("iemMemPageTranslateAndCheckAccess: GCPtrMem=%RGv - read-only page -> #PF\n", GCPtrMem));
5380	*pGCPhysMem = NIL_RTGCPHYS;
5381	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
5382	if (Walk.fFailed & PGM_WALKFAIL_EPT)
5383	IEM_VMX_VMEXIT_EPT_RET(pVCpu, &Walk, fAccess, IEM_SLAT_FAIL_LINEAR_TO_PAGE_TABLE, 0 /* cbInstr */);
5384	#endif
5385	return iemRaisePageFault(pVCpu, GCPtrMem, fAccess & ~IEM_ACCESS_TYPE_READ, VERR_ACCESS_DENIED);
5386	}
5387
5388	/* Kernel memory accessed by userland? */
5389	if ( !(Walk.fEffective & X86_PTE_US)
5390	&& pVCpu->iem.s.uCpl == 3
5391	&& !(fAccess & IEM_ACCESS_WHAT_SYS))
5392	{
5393	Log(("iemMemPageTranslateAndCheckAccess: GCPtrMem=%RGv - user access to kernel page -> #PF\n", GCPtrMem));
5394	*pGCPhysMem = NIL_RTGCPHYS;
5395	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
5396	if (Walk.fFailed & PGM_WALKFAIL_EPT)
5397	IEM_VMX_VMEXIT_EPT_RET(pVCpu, &Walk, fAccess, IEM_SLAT_FAIL_LINEAR_TO_PAGE_TABLE, 0 /* cbInstr */);
5398	#endif
5399	return iemRaisePageFault(pVCpu, GCPtrMem, fAccess, VERR_ACCESS_DENIED);
5400	}
5401
5402	/* Executing non-executable memory? */
5403	if ( (fAccess & IEM_ACCESS_TYPE_EXEC)
5404	&& (Walk.fEffective & X86_PTE_PAE_NX)
5405	&& (pVCpu->cpum.GstCtx.msrEFER & MSR_K6_EFER_NXE) )
5406	{
5407	Log(("iemMemPageTranslateAndCheckAccess: GCPtrMem=%RGv - NX -> #PF\n", GCPtrMem));
5408	*pGCPhysMem = NIL_RTGCPHYS;
5409	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
5410	if (Walk.fFailed & PGM_WALKFAIL_EPT)
5411	IEM_VMX_VMEXIT_EPT_RET(pVCpu, &Walk, fAccess, IEM_SLAT_FAIL_LINEAR_TO_PAGE_TABLE, 0 /* cbInstr */);
5412	#endif
5413	return iemRaisePageFault(pVCpu, GCPtrMem, fAccess & ~(IEM_ACCESS_TYPE_READ \| IEM_ACCESS_TYPE_WRITE),
5414	VERR_ACCESS_DENIED);
5415	}
5416	}
5417
5418	/*
5419	* Set the dirty / access flags.
5420	* ASSUMES this is set when the address is translated rather than on committ...
5421	*/
5422	/** @todo testcase: check when A and D bits are actually set by the CPU. */
5423	uint32_t fAccessedDirty = fAccess & IEM_ACCESS_TYPE_WRITE ? X86_PTE_D \| X86_PTE_A : X86_PTE_A;
5424	if ((Walk.fEffective & fAccessedDirty) != fAccessedDirty)
5425	{
5426	int rc2 = PGMGstModifyPage(pVCpu, GCPtrMem, 1, fAccessedDirty, ~(uint64_t)fAccessedDirty);
5427	AssertRC(rc2);
5428	/** @todo Nested VMX: Accessed/dirty bit currently not supported, asserted below. */
5429	Assert(!(CPUMGetGuestIa32VmxEptVpidCap(pVCpu) & VMX_BF_EPT_VPID_CAP_ACCESS_DIRTY_MASK));
5430	}
5431
5432	RTGCPHYS const GCPhys = Walk.GCPhys \| (GCPtrMem & GUEST_PAGE_OFFSET_MASK);
5433	*pGCPhysMem = GCPhys;
5434	return VINF_SUCCESS;
5435	}
5436
5437
5438	/**
5439	* Looks up a memory mapping entry.
5440	*
5441	* @returns The mapping index (positive) or VERR_NOT_FOUND (negative).
5442	* @param pVCpu The cross context virtual CPU structure of the calling thread.
5443	* @param pvMem The memory address.
5444	* @param fAccess The access to.
5445	*/
5446	DECLINLINE(int) iemMapLookup(PVMCPUCC pVCpu, void *pvMem, uint32_t fAccess)
5447	{
5448	Assert(pVCpu->iem.s.cActiveMappings <= RT_ELEMENTS(pVCpu->iem.s.aMemMappings));
5449	fAccess &= IEM_ACCESS_WHAT_MASK \| IEM_ACCESS_TYPE_MASK;
5450	if ( pVCpu->iem.s.aMemMappings[0].pv == pvMem
5451	&& (pVCpu->iem.s.aMemMappings[0].fAccess & (IEM_ACCESS_WHAT_MASK \| IEM_ACCESS_TYPE_MASK)) == fAccess)
5452	return 0;
5453	if ( pVCpu->iem.s.aMemMappings[1].pv == pvMem
5454	&& (pVCpu->iem.s.aMemMappings[1].fAccess & (IEM_ACCESS_WHAT_MASK \| IEM_ACCESS_TYPE_MASK)) == fAccess)
5455	return 1;
5456	if ( pVCpu->iem.s.aMemMappings[2].pv == pvMem
5457	&& (pVCpu->iem.s.aMemMappings[2].fAccess & (IEM_ACCESS_WHAT_MASK \| IEM_ACCESS_TYPE_MASK)) == fAccess)
5458	return 2;
5459	return VERR_NOT_FOUND;
5460	}
5461
5462
5463	/**
5464	* Finds a free memmap entry when using iNextMapping doesn't work.
5465	*
5466	* @returns Memory mapping index, 1024 on failure.
5467	* @param pVCpu The cross context virtual CPU structure of the calling thread.
5468	*/
5469	static unsigned iemMemMapFindFree(PVMCPUCC pVCpu)
5470	{
5471	/*
5472	* The easy case.
5473	*/
5474	if (pVCpu->iem.s.cActiveMappings == 0)
5475	{
5476	pVCpu->iem.s.iNextMapping = 1;
5477	return 0;
5478	}
5479
5480	/* There should be enough mappings for all instructions. */
5481	AssertReturn(pVCpu->iem.s.cActiveMappings < RT_ELEMENTS(pVCpu->iem.s.aMemMappings), 1024);
5482
5483	for (unsigned i = 0; i < RT_ELEMENTS(pVCpu->iem.s.aMemMappings); i++)
5484	if (pVCpu->iem.s.aMemMappings[i].fAccess == IEM_ACCESS_INVALID)
5485	return i;
5486
5487	AssertFailedReturn(1024);
5488	}
5489
5490
5491	/**
5492	* Commits a bounce buffer that needs writing back and unmaps it.
5493	*
5494	* @returns Strict VBox status code.
5495	* @param pVCpu The cross context virtual CPU structure of the calling thread.
5496	* @param iMemMap The index of the buffer to commit.
5497	* @param fPostponeFail Whether we can postpone writer failures to ring-3.
5498	* Always false in ring-3, obviously.
5499	*/
5500	static VBOXSTRICTRC iemMemBounceBufferCommitAndUnmap(PVMCPUCC pVCpu, unsigned iMemMap, bool fPostponeFail)
5501	{
5502	Assert(pVCpu->iem.s.aMemMappings[iMemMap].fAccess & IEM_ACCESS_BOUNCE_BUFFERED);
5503	Assert(pVCpu->iem.s.aMemMappings[iMemMap].fAccess & IEM_ACCESS_TYPE_WRITE);
5504	#ifdef IN_RING3
5505	Assert(!fPostponeFail);
5506	RT_NOREF_PV(fPostponeFail);
5507	#endif
5508
5509	/*
5510	* Do the writing.
5511	*/
5512	PVMCC pVM = pVCpu->CTX_SUFF(pVM);
5513	if (!pVCpu->iem.s.aMemBbMappings[iMemMap].fUnassigned)
5514	{
5515	uint16_t const cbFirst = pVCpu->iem.s.aMemBbMappings[iMemMap].cbFirst;
5516	uint16_t const cbSecond = pVCpu->iem.s.aMemBbMappings[iMemMap].cbSecond;
5517	uint8_t const *pbBuf = &pVCpu->iem.s.aBounceBuffers[iMemMap].ab[0];
5518	if (!pVCpu->iem.s.fBypassHandlers)
5519	{
5520	/*
5521	* Carefully and efficiently dealing with access handler return
5522	* codes make this a little bloated.
5523	*/
5524	VBOXSTRICTRC rcStrict = PGMPhysWrite(pVM,
5525	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst,
5526	pbBuf,
5527	cbFirst,
5528	PGMACCESSORIGIN_IEM);
5529	if (rcStrict == VINF_SUCCESS)
5530	{
5531	if (cbSecond)
5532	{
5533	rcStrict = PGMPhysWrite(pVM,
5534	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond,
5535	pbBuf + cbFirst,
5536	cbSecond,
5537	PGMACCESSORIGIN_IEM);
5538	if (rcStrict == VINF_SUCCESS)
5539	{ /* nothing */ }
5540	else if (PGM_PHYS_RW_IS_SUCCESS(rcStrict))
5541	{
5542	Log(("iemMemBounceBufferCommitAndUnmap: PGMPhysWrite GCPhysFirst=%RGp/%#x GCPhysSecond=%RGp/%#x %Rrc\n",
5543	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst, cbFirst,
5544	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond, cbSecond, VBOXSTRICTRC_VAL(rcStrict) ));
5545	rcStrict = iemSetPassUpStatus(pVCpu, rcStrict);
5546	}
5547	#ifndef IN_RING3
5548	else if (fPostponeFail)
5549	{
5550	Log(("iemMemBounceBufferCommitAndUnmap: PGMPhysWrite GCPhysFirst=%RGp/%#x GCPhysSecond=%RGp/%#x %Rrc (postponed)\n",
5551	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst, cbFirst,
5552	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond, cbSecond, VBOXSTRICTRC_VAL(rcStrict) ));
5553	pVCpu->iem.s.aMemMappings[iMemMap].fAccess \|= IEM_ACCESS_PENDING_R3_WRITE_2ND;
5554	VMCPU_FF_SET(pVCpu, VMCPU_FF_IEM);
5555	return iemSetPassUpStatus(pVCpu, rcStrict);
5556	}
5557	#endif
5558	else
5559	{
5560	Log(("iemMemBounceBufferCommitAndUnmap: PGMPhysWrite GCPhysFirst=%RGp/%#x GCPhysSecond=%RGp/%#x %Rrc (!!)\n",
5561	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst, cbFirst,
5562	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond, cbSecond, VBOXSTRICTRC_VAL(rcStrict) ));
5563	return rcStrict;
5564	}
5565	}
5566	}
5567	else if (PGM_PHYS_RW_IS_SUCCESS(rcStrict))
5568	{
5569	if (!cbSecond)
5570	{
5571	Log(("iemMemBounceBufferCommitAndUnmap: PGMPhysWrite GCPhysFirst=%RGp/%#x %Rrc\n",
5572	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst, cbFirst, VBOXSTRICTRC_VAL(rcStrict) ));
5573	rcStrict = iemSetPassUpStatus(pVCpu, rcStrict);
5574	}
5575	else
5576	{
5577	VBOXSTRICTRC rcStrict2 = PGMPhysWrite(pVM,
5578	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond,
5579	pbBuf + cbFirst,
5580	cbSecond,
5581	PGMACCESSORIGIN_IEM);
5582	if (rcStrict2 == VINF_SUCCESS)
5583	{
5584	Log(("iemMemBounceBufferCommitAndUnmap: PGMPhysWrite GCPhysFirst=%RGp/%#x %Rrc GCPhysSecond=%RGp/%#x\n",
5585	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst, cbFirst, VBOXSTRICTRC_VAL(rcStrict),
5586	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond, cbSecond));
5587	rcStrict = iemSetPassUpStatus(pVCpu, rcStrict);
5588	}
5589	else if (PGM_PHYS_RW_IS_SUCCESS(rcStrict2))
5590	{
5591	Log(("iemMemBounceBufferCommitAndUnmap: PGMPhysWrite GCPhysFirst=%RGp/%#x %Rrc GCPhysSecond=%RGp/%#x %Rrc\n",
5592	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst, cbFirst, VBOXSTRICTRC_VAL(rcStrict),
5593	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond, cbSecond, VBOXSTRICTRC_VAL(rcStrict2) ));
5594	PGM_PHYS_RW_DO_UPDATE_STRICT_RC(rcStrict, rcStrict2);
5595	rcStrict = iemSetPassUpStatus(pVCpu, rcStrict);
5596	}
5597	#ifndef IN_RING3
5598	else if (fPostponeFail)
5599	{
5600	Log(("iemMemBounceBufferCommitAndUnmap: PGMPhysWrite GCPhysFirst=%RGp/%#x GCPhysSecond=%RGp/%#x %Rrc (postponed)\n",
5601	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst, cbFirst,
5602	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond, cbSecond, VBOXSTRICTRC_VAL(rcStrict) ));
5603	pVCpu->iem.s.aMemMappings[iMemMap].fAccess \|= IEM_ACCESS_PENDING_R3_WRITE_2ND;
5604	VMCPU_FF_SET(pVCpu, VMCPU_FF_IEM);
5605	return iemSetPassUpStatus(pVCpu, rcStrict);
5606	}
5607	#endif
5608	else
5609	{
5610	Log(("iemMemBounceBufferCommitAndUnmap: PGMPhysWrite GCPhysFirst=%RGp/%#x %Rrc GCPhysSecond=%RGp/%#x %Rrc (!!)\n",
5611	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst, cbFirst, VBOXSTRICTRC_VAL(rcStrict),
5612	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond, cbSecond, VBOXSTRICTRC_VAL(rcStrict2) ));
5613	return rcStrict2;
5614	}
5615	}
5616	}
5617	#ifndef IN_RING3
5618	else if (fPostponeFail)
5619	{
5620	Log(("iemMemBounceBufferCommitAndUnmap: PGMPhysWrite GCPhysFirst=%RGp/%#x GCPhysSecond=%RGp/%#x %Rrc (postponed)\n",
5621	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst, cbFirst,
5622	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond, cbSecond, VBOXSTRICTRC_VAL(rcStrict) ));
5623	if (!cbSecond)
5624	pVCpu->iem.s.aMemMappings[iMemMap].fAccess \|= IEM_ACCESS_PENDING_R3_WRITE_1ST;
5625	else
5626	pVCpu->iem.s.aMemMappings[iMemMap].fAccess \|= IEM_ACCESS_PENDING_R3_WRITE_1ST \| IEM_ACCESS_PENDING_R3_WRITE_2ND;
5627	VMCPU_FF_SET(pVCpu, VMCPU_FF_IEM);
5628	return iemSetPassUpStatus(pVCpu, rcStrict);
5629	}
5630	#endif
5631	else
5632	{
5633	Log(("iemMemBounceBufferCommitAndUnmap: PGMPhysWrite GCPhysFirst=%RGp/%#x %Rrc [GCPhysSecond=%RGp/%#x] (!!)\n",
5634	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst, cbFirst, VBOXSTRICTRC_VAL(rcStrict),
5635	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond, cbSecond));
5636	return rcStrict;
5637	}
5638	}
5639	else
5640	{
5641	/*
5642	* No access handlers, much simpler.
5643	*/
5644	int rc = PGMPhysSimpleWriteGCPhys(pVM, pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst, pbBuf, cbFirst);
5645	if (RT_SUCCESS(rc))
5646	{
5647	if (cbSecond)
5648	{
5649	rc = PGMPhysSimpleWriteGCPhys(pVM, pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond, pbBuf + cbFirst, cbSecond);
5650	if (RT_SUCCESS(rc))
5651	{ /* likely */ }
5652	else
5653	{
5654	Log(("iemMemBounceBufferCommitAndUnmap: PGMPhysSimpleWriteGCPhys GCPhysFirst=%RGp/%#x GCPhysSecond=%RGp/%#x %Rrc (!!)\n",
5655	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst, cbFirst,
5656	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond, cbSecond, rc));
5657	return rc;
5658	}
5659	}
5660	}
5661	else
5662	{
5663	Log(("iemMemBounceBufferCommitAndUnmap: PGMPhysSimpleWriteGCPhys GCPhysFirst=%RGp/%#x %Rrc [GCPhysSecond=%RGp/%#x] (!!)\n",
5664	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst, cbFirst, rc,
5665	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond, cbSecond));
5666	return rc;
5667	}
5668	}
5669	}
5670
5671	#if defined(IEM_LOG_MEMORY_WRITES)
5672	Log(("IEM Wrote %RGp: %.*Rhxs\n", pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst,
5673	RT_MAX(RT_MIN(pVCpu->iem.s.aMemBbMappings[iMemMap].cbFirst, 64), 1), &pVCpu->iem.s.aBounceBuffers[iMemMap].ab[0]));
5674	if (pVCpu->iem.s.aMemBbMappings[iMemMap].cbSecond)
5675	Log(("IEM Wrote %RGp: %.*Rhxs [2nd page]\n", pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond,
5676	RT_MIN(pVCpu->iem.s.aMemBbMappings[iMemMap].cbSecond, 64),
5677	&pVCpu->iem.s.aBounceBuffers[iMemMap].ab[pVCpu->iem.s.aMemBbMappings[iMemMap].cbFirst]));
5678
5679	size_t cbWrote = pVCpu->iem.s.aMemBbMappings[iMemMap].cbFirst + pVCpu->iem.s.aMemBbMappings[iMemMap].cbSecond;
5680	g_cbIemWrote = cbWrote;
5681	memcpy(g_abIemWrote, &pVCpu->iem.s.aBounceBuffers[iMemMap].ab[0], RT_MIN(cbWrote, sizeof(g_abIemWrote)));
5682	#endif
5683
5684	/*
5685	* Free the mapping entry.
5686	*/
5687	pVCpu->iem.s.aMemMappings[iMemMap].fAccess = IEM_ACCESS_INVALID;
5688	Assert(pVCpu->iem.s.cActiveMappings != 0);
5689	pVCpu->iem.s.cActiveMappings--;
5690	return VINF_SUCCESS;
5691	}
5692
5693
5694	/**
5695	* iemMemMap worker that deals with a request crossing pages.
5696	*/
5697	static VBOXSTRICTRC
5698	iemMemBounceBufferMapCrossPage(PVMCPUCC pVCpu, int iMemMap, void **ppvMem, size_t cbMem, RTGCPTR GCPtrFirst, uint32_t fAccess)
5699	{
5700	/*
5701	* Do the address translations.
5702	*/
5703	RTGCPHYS GCPhysFirst;
5704	VBOXSTRICTRC rcStrict = iemMemPageTranslateAndCheckAccess(pVCpu, GCPtrFirst, fAccess, &GCPhysFirst);
5705	if (rcStrict != VINF_SUCCESS)
5706	return rcStrict;
5707
5708	RTGCPHYS GCPhysSecond;
5709	rcStrict = iemMemPageTranslateAndCheckAccess(pVCpu, (GCPtrFirst + (cbMem - 1)) & ~(RTGCPTR)GUEST_PAGE_OFFSET_MASK,
5710	fAccess, &GCPhysSecond);
5711	if (rcStrict != VINF_SUCCESS)
5712	return rcStrict;
5713	GCPhysSecond &= ~(RTGCPHYS)GUEST_PAGE_OFFSET_MASK;
5714
5715	PVMCC pVM = pVCpu->CTX_SUFF(pVM);
5716
5717	/*
5718	* Read in the current memory content if it's a read, execute or partial
5719	* write access.
5720	*/
5721	uint8_t *pbBuf = &pVCpu->iem.s.aBounceBuffers[iMemMap].ab[0];
5722	uint32_t const cbFirstPage = GUEST_PAGE_SIZE - (GCPhysFirst & GUEST_PAGE_OFFSET_MASK);
5723	uint32_t const cbSecondPage = (uint32_t)(cbMem - cbFirstPage);
5724
5725	if (fAccess & (IEM_ACCESS_TYPE_READ \| IEM_ACCESS_TYPE_EXEC \| IEM_ACCESS_PARTIAL_WRITE))
5726	{
5727	if (!pVCpu->iem.s.fBypassHandlers)
5728	{
5729	/*
5730	* Must carefully deal with access handler status codes here,
5731	* makes the code a bit bloated.
5732	*/
5733	rcStrict = PGMPhysRead(pVM, GCPhysFirst, pbBuf, cbFirstPage, PGMACCESSORIGIN_IEM);
5734	if (rcStrict == VINF_SUCCESS)
5735	{
5736	rcStrict = PGMPhysRead(pVM, GCPhysSecond, pbBuf + cbFirstPage, cbSecondPage, PGMACCESSORIGIN_IEM);
5737	if (rcStrict == VINF_SUCCESS)
5738	{ /likely / }
5739	else if (PGM_PHYS_RW_IS_SUCCESS(rcStrict))
5740	rcStrict = iemSetPassUpStatus(pVCpu, rcStrict);
5741	else
5742	{
5743	Log(("iemMemBounceBufferMapPhys: PGMPhysRead GCPhysSecond=%RGp rcStrict2=%Rrc (!!)\n",
5744	GCPhysSecond, VBOXSTRICTRC_VAL(rcStrict) ));
5745	return rcStrict;
5746	}
5747	}
5748	else if (PGM_PHYS_RW_IS_SUCCESS(rcStrict))
5749	{
5750	VBOXSTRICTRC rcStrict2 = PGMPhysRead(pVM, GCPhysSecond, pbBuf + cbFirstPage, cbSecondPage, PGMACCESSORIGIN_IEM);
5751	if (PGM_PHYS_RW_IS_SUCCESS(rcStrict2))
5752	{
5753	PGM_PHYS_RW_DO_UPDATE_STRICT_RC(rcStrict, rcStrict2);
5754	rcStrict = iemSetPassUpStatus(pVCpu, rcStrict);
5755	}
5756	else
5757	{
5758	Log(("iemMemBounceBufferMapPhys: PGMPhysRead GCPhysSecond=%RGp rcStrict2=%Rrc (rcStrict=%Rrc) (!!)\n",
5759	GCPhysSecond, VBOXSTRICTRC_VAL(rcStrict2), VBOXSTRICTRC_VAL(rcStrict2) ));
5760	return rcStrict2;
5761	}
5762	}
5763	else
5764	{
5765	Log(("iemMemBounceBufferMapPhys: PGMPhysRead GCPhysFirst=%RGp rcStrict=%Rrc (!!)\n",
5766	GCPhysFirst, VBOXSTRICTRC_VAL(rcStrict) ));
5767	return rcStrict;
5768	}
5769	}
5770	else
5771	{
5772	/*
5773	* No informational status codes here, much more straight forward.
5774	*/
5775	int rc = PGMPhysSimpleReadGCPhys(pVM, pbBuf, GCPhysFirst, cbFirstPage);
5776	if (RT_SUCCESS(rc))
5777	{
5778	Assert(rc == VINF_SUCCESS);
5779	rc = PGMPhysSimpleReadGCPhys(pVM, pbBuf + cbFirstPage, GCPhysSecond, cbSecondPage);
5780	if (RT_SUCCESS(rc))
5781	Assert(rc == VINF_SUCCESS);
5782	else
5783	{
5784	Log(("iemMemBounceBufferMapPhys: PGMPhysSimpleReadGCPhys GCPhysSecond=%RGp rc=%Rrc (!!)\n", GCPhysSecond, rc));
5785	return rc;
5786	}
5787	}
5788	else
5789	{
5790	Log(("iemMemBounceBufferMapPhys: PGMPhysSimpleReadGCPhys GCPhysFirst=%RGp rc=%Rrc (!!)\n", GCPhysFirst, rc));
5791	return rc;
5792	}
5793	}
5794	}
5795	#ifdef VBOX_STRICT
5796	else
5797	memset(pbBuf, 0xcc, cbMem);
5798	if (cbMem < sizeof(pVCpu->iem.s.aBounceBuffers[iMemMap].ab))
5799	memset(pbBuf + cbMem, 0xaa, sizeof(pVCpu->iem.s.aBounceBuffers[iMemMap].ab) - cbMem);
5800	#endif
5801	AssertCompileMemberAlignment(VMCPU, iem.s.aBounceBuffers, 64);
5802
5803	/*
5804	* Commit the bounce buffer entry.
5805	*/
5806	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst = GCPhysFirst;
5807	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond = GCPhysSecond;
5808	pVCpu->iem.s.aMemBbMappings[iMemMap].cbFirst = (uint16_t)cbFirstPage;
5809	pVCpu->iem.s.aMemBbMappings[iMemMap].cbSecond = (uint16_t)cbSecondPage;
5810	pVCpu->iem.s.aMemBbMappings[iMemMap].fUnassigned = false;
5811	pVCpu->iem.s.aMemMappings[iMemMap].pv = pbBuf;
5812	pVCpu->iem.s.aMemMappings[iMemMap].fAccess = fAccess \| IEM_ACCESS_BOUNCE_BUFFERED;
5813	pVCpu->iem.s.iNextMapping = iMemMap + 1;
5814	pVCpu->iem.s.cActiveMappings++;
5815
5816	iemMemUpdateWrittenCounter(pVCpu, fAccess, cbMem);
5817	*ppvMem = pbBuf;
5818	return VINF_SUCCESS;
5819	}
5820
5821
5822	/**
5823	* iemMemMap woker that deals with iemMemPageMap failures.
5824	*/
5825	static VBOXSTRICTRC iemMemBounceBufferMapPhys(PVMCPUCC pVCpu, unsigned iMemMap, void **ppvMem, size_t cbMem,
5826	RTGCPHYS GCPhysFirst, uint32_t fAccess, VBOXSTRICTRC rcMap)
5827	{
5828	/*
5829	* Filter out conditions we can handle and the ones which shouldn't happen.
5830	*/
5831	if ( rcMap != VERR_PGM_PHYS_TLB_CATCH_WRITE
5832	&& rcMap != VERR_PGM_PHYS_TLB_CATCH_ALL
5833	&& rcMap != VERR_PGM_PHYS_TLB_UNASSIGNED)
5834	{
5835	AssertReturn(RT_FAILURE_NP(rcMap), VERR_IEM_IPE_8);
5836	return rcMap;
5837	}
5838	pVCpu->iem.s.cPotentialExits++;
5839
5840	/*
5841	* Read in the current memory content if it's a read, execute or partial
5842	* write access.
5843	*/
5844	uint8_t *pbBuf = &pVCpu->iem.s.aBounceBuffers[iMemMap].ab[0];
5845	if (fAccess & (IEM_ACCESS_TYPE_READ \| IEM_ACCESS_TYPE_EXEC \| IEM_ACCESS_PARTIAL_WRITE))
5846	{
5847	if (rcMap == VERR_PGM_PHYS_TLB_UNASSIGNED)
5848	memset(pbBuf, 0xff, cbMem);
5849	else
5850	{
5851	int rc;
5852	if (!pVCpu->iem.s.fBypassHandlers)
5853	{
5854	VBOXSTRICTRC rcStrict = PGMPhysRead(pVCpu->CTX_SUFF(pVM), GCPhysFirst, pbBuf, cbMem, PGMACCESSORIGIN_IEM);
5855	if (rcStrict == VINF_SUCCESS)
5856	{ /* nothing */ }
5857	else if (PGM_PHYS_RW_IS_SUCCESS(rcStrict))
5858	rcStrict = iemSetPassUpStatus(pVCpu, rcStrict);
5859	else
5860	{
5861	Log(("iemMemBounceBufferMapPhys: PGMPhysRead GCPhysFirst=%RGp rcStrict=%Rrc (!!)\n",
5862	GCPhysFirst, VBOXSTRICTRC_VAL(rcStrict) ));
5863	return rcStrict;
5864	}
5865	}
5866	else
5867	{
5868	rc = PGMPhysSimpleReadGCPhys(pVCpu->CTX_SUFF(pVM), pbBuf, GCPhysFirst, cbMem);
5869	if (RT_SUCCESS(rc))
5870	{ /* likely */ }
5871	else
5872	{
5873	Log(("iemMemBounceBufferMapPhys: PGMPhysSimpleReadGCPhys GCPhysFirst=%RGp rcStrict=%Rrc (!!)\n",
5874	GCPhysFirst, rc));
5875	return rc;
5876	}
5877	}
5878	}
5879	}
5880	#ifdef VBOX_STRICT
5881	else
5882	memset(pbBuf, 0xcc, cbMem);
5883	#endif
5884	#ifdef VBOX_STRICT
5885	if (cbMem < sizeof(pVCpu->iem.s.aBounceBuffers[iMemMap].ab))
5886	memset(pbBuf + cbMem, 0xaa, sizeof(pVCpu->iem.s.aBounceBuffers[iMemMap].ab) - cbMem);
5887	#endif
5888
5889	/*
5890	* Commit the bounce buffer entry.
5891	*/
5892	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst = GCPhysFirst;
5893	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond = NIL_RTGCPHYS;
5894	pVCpu->iem.s.aMemBbMappings[iMemMap].cbFirst = (uint16_t)cbMem;
5895	pVCpu->iem.s.aMemBbMappings[iMemMap].cbSecond = 0;
5896	pVCpu->iem.s.aMemBbMappings[iMemMap].fUnassigned = rcMap == VERR_PGM_PHYS_TLB_UNASSIGNED;
5897	pVCpu->iem.s.aMemMappings[iMemMap].pv = pbBuf;
5898	pVCpu->iem.s.aMemMappings[iMemMap].fAccess = fAccess \| IEM_ACCESS_BOUNCE_BUFFERED;
5899	pVCpu->iem.s.iNextMapping = iMemMap + 1;
5900	pVCpu->iem.s.cActiveMappings++;
5901
5902	iemMemUpdateWrittenCounter(pVCpu, fAccess, cbMem);
5903	*ppvMem = pbBuf;
5904	return VINF_SUCCESS;
5905	}
5906
5907
5908
5909	/**
5910	* Maps the specified guest memory for the given kind of access.
5911	*
5912	* This may be using bounce buffering of the memory if it's crossing a page
5913	* boundary or if there is an access handler installed for any of it. Because
5914	* of lock prefix guarantees, we're in for some extra clutter when this
5915	* happens.
5916	*
5917	* This may raise a \#GP, \#SS, \#PF or \#AC.
5918	*
5919	* @returns VBox strict status code.
5920	*
5921	* @param pVCpu The cross context virtual CPU structure of the calling thread.
5922	* @param ppvMem Where to return the pointer to the mapped memory.
5923	* @param cbMem The number of bytes to map. This is usually 1, 2, 4, 6,
5924	* 8, 12, 16, 32 or 512. When used by string operations
5925	* it can be up to a page.
5926	* @param iSegReg The index of the segment register to use for this
5927	* access. The base and limits are checked. Use UINT8_MAX
5928	* to indicate that no segmentation is required (for IDT,
5929	* GDT and LDT accesses).
5930	* @param GCPtrMem The address of the guest memory.
5931	* @param fAccess How the memory is being accessed. The
5932	* IEM_ACCESS_TYPE_XXX bit is used to figure out how to map
5933	* the memory, while the IEM_ACCESS_WHAT_XXX bit is used
5934	* when raising exceptions.
5935	* @param uAlignCtl Alignment control:
5936	* - Bits 15:0 is the alignment mask.
5937	* - Bits 31:16 for flags like IEM_MEMMAP_F_ALIGN_GP,
5938	* IEM_MEMMAP_F_ALIGN_SSE, and
5939	* IEM_MEMMAP_F_ALIGN_GP_OR_AC.
5940	* Pass zero to skip alignment.
5941	*/
5942	VBOXSTRICTRC iemMemMap(PVMCPUCC pVCpu, void **ppvMem, size_t cbMem, uint8_t iSegReg, RTGCPTR GCPtrMem,
5943	uint32_t fAccess, uint32_t uAlignCtl) RT_NOEXCEPT
5944	{
5945	/*
5946	* Check the input and figure out which mapping entry to use.
5947	*/
5948	Assert(cbMem <= sizeof(pVCpu->iem.s.aBounceBuffers[0]));
5949	Assert( cbMem <= 64 \|\| cbMem == 512 \|\| cbMem == 256 \|\| cbMem == 108 \|\| cbMem == 104 \|\| cbMem == 102 \|\| cbMem == 94
5950	\|\| (iSegReg == UINT8_MAX && uAlignCtl == 0 && fAccess == IEM_ACCESS_DATA_R /* for the CPUID logging interface */) );
5951	Assert(~(fAccess & ~(IEM_ACCESS_TYPE_MASK \| IEM_ACCESS_WHAT_MASK)));
5952	Assert(pVCpu->iem.s.cActiveMappings < RT_ELEMENTS(pVCpu->iem.s.aMemMappings));
5953
5954	unsigned iMemMap = pVCpu->iem.s.iNextMapping;
5955	if ( iMemMap >= RT_ELEMENTS(pVCpu->iem.s.aMemMappings)
5956	\|\| pVCpu->iem.s.aMemMappings[iMemMap].fAccess != IEM_ACCESS_INVALID)
5957	{
5958	iMemMap = iemMemMapFindFree(pVCpu);
5959	AssertLogRelMsgReturn(iMemMap < RT_ELEMENTS(pVCpu->iem.s.aMemMappings),
5960	("active=%d fAccess[0] = {%#x, %#x, %#x}\n", pVCpu->iem.s.cActiveMappings,
5961	pVCpu->iem.s.aMemMappings[0].fAccess, pVCpu->iem.s.aMemMappings[1].fAccess,
5962	pVCpu->iem.s.aMemMappings[2].fAccess),
5963	VERR_IEM_IPE_9);
5964	}
5965
5966	/*
5967	* Map the memory, checking that we can actually access it. If something
5968	* slightly complicated happens, fall back on bounce buffering.
5969	*/
5970	VBOXSTRICTRC rcStrict = iemMemApplySegment(pVCpu, fAccess, iSegReg, cbMem, &GCPtrMem);
5971	if (rcStrict == VINF_SUCCESS)
5972	{ /* likely */ }
5973	else
5974	return rcStrict;
5975
5976	if ((GCPtrMem & GUEST_PAGE_OFFSET_MASK) + cbMem <= GUEST_PAGE_SIZE) /* Crossing a page boundary? */
5977	{ /* likely */ }
5978	else
5979	return iemMemBounceBufferMapCrossPage(pVCpu, iMemMap, ppvMem, cbMem, GCPtrMem, fAccess);
5980
5981	/*
5982	* Alignment check.
5983	*/
5984	if ( (GCPtrMem & (uAlignCtl & UINT16_MAX)) == 0 )
5985	{ /* likelyish */ }
5986	else
5987	{
5988	/* Misaligned access. */
5989	if ((fAccess & IEM_ACCESS_WHAT_MASK) != IEM_ACCESS_WHAT_SYS)
5990	{
5991	if ( !(uAlignCtl & IEM_MEMMAP_F_ALIGN_GP)
5992	\|\| ( (uAlignCtl & IEM_MEMMAP_F_ALIGN_SSE)
5993	&& (pVCpu->cpum.GstCtx.XState.x87.MXCSR & X86_MXCSR_MM)) )
5994	{
5995	AssertCompile(X86_CR0_AM == X86_EFL_AC);
5996
5997	if (iemMemAreAlignmentChecksEnabled(pVCpu))
5998	return iemRaiseAlignmentCheckException(pVCpu);
5999	}
6000	else if ( (uAlignCtl & IEM_MEMMAP_F_ALIGN_GP_OR_AC)
6001	&& iemMemAreAlignmentChecksEnabled(pVCpu)
6002	/** @todo may only apply to 2, 4 or 8 byte misalignments depending on the CPU
6003	* implementation. See FXSAVE/FRSTOR/XSAVE/XRSTOR/++. */
6004	)
6005	return iemRaiseAlignmentCheckException(pVCpu);
6006	else
6007	return iemRaiseGeneralProtectionFault0(pVCpu);
6008	}
6009	}
6010
6011	#ifdef IEM_WITH_DATA_TLB
6012	Assert(!(fAccess & IEM_ACCESS_TYPE_EXEC));
6013
6014	/*
6015	* Get the TLB entry for this page.
6016	*/
6017	uint64_t const uTag = IEMTLB_CALC_TAG( &pVCpu->iem.s.DataTlb, GCPtrMem);
6018	PIEMTLBENTRY const pTlbe = IEMTLB_TAG_TO_ENTRY(&pVCpu->iem.s.DataTlb, uTag);
6019	if (pTlbe->uTag == uTag)
6020	{
6021	# ifdef VBOX_WITH_STATISTICS
6022	pVCpu->iem.s.DataTlb.cTlbHits++;
6023	# endif
6024	}
6025	else
6026	{
6027	pVCpu->iem.s.DataTlb.cTlbMisses++;
6028	PGMPTWALK Walk;
6029	int rc = PGMGstGetPage(pVCpu, GCPtrMem, &Walk);
6030	if (RT_FAILURE(rc))
6031	{
6032	Log(("iemMemMap: GCPtrMem=%RGv - failed to fetch page -> #PF\n", GCPtrMem));
6033	# ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
6034	if (Walk.fFailed & PGM_WALKFAIL_EPT)
6035	IEM_VMX_VMEXIT_EPT_RET(pVCpu, &Walk, fAccess, IEM_SLAT_FAIL_LINEAR_TO_PHYS_ADDR, 0 /* cbInstr */);
6036	# endif
6037	iemRaisePageFaultJmp(pVCpu, GCPtrMem, fAccess, rc);
6038	}
6039
6040	Assert(Walk.fSucceeded);
6041	pTlbe->uTag = uTag;
6042	pTlbe->fFlagsAndPhysRev = ~Walk.fEffective & (X86_PTE_US \| X86_PTE_RW \| X86_PTE_D \| X86_PTE_A); /* skipping NX */
6043	pTlbe->GCPhys = Walk.GCPhys;
6044	pTlbe->pbMappingR3 = NULL;
6045	}
6046
6047	/*
6048	* Check TLB page table level access flags.
6049	*/
6050	/* If the page is either supervisor only or non-writable, we need to do
6051	more careful access checks. */
6052	if (pTlbe->fFlagsAndPhysRev & (IEMTLBE_F_PT_NO_USER \| IEMTLBE_F_PT_NO_WRITE))
6053	{
6054	/* Write to read only memory? */
6055	if ( (pTlbe->fFlagsAndPhysRev & IEMTLBE_F_PT_NO_WRITE)
6056	&& (fAccess & IEM_ACCESS_TYPE_WRITE)
6057	&& ( ( pVCpu->iem.s.uCpl == 3
6058	&& !(fAccess & IEM_ACCESS_WHAT_SYS))
6059	\|\| (pVCpu->cpum.GstCtx.cr0 & X86_CR0_WP)))
6060	{
6061	Log(("iemMemMap: GCPtrMem=%RGv - read-only page -> #PF\n", GCPtrMem));
6062	# ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
6063	if (Walk.fFailed & PGM_WALKFAIL_EPT)
6064	IEM_VMX_VMEXIT_EPT_RET(pVCpu, &Walk, fAccess, IEM_SLAT_FAIL_LINEAR_TO_PAGE_TABLE, 0 /* cbInstr */);
6065	# endif
6066	iemRaisePageFaultJmp(pVCpu, GCPtrMem, fAccess & ~IEM_ACCESS_TYPE_READ, VERR_ACCESS_DENIED);
6067	}
6068
6069	/* Kernel memory accessed by userland? */
6070	if ( (pTlbe->fFlagsAndPhysRev & IEMTLBE_F_PT_NO_USER)
6071	&& pVCpu->iem.s.uCpl == 3
6072	&& !(fAccess & IEM_ACCESS_WHAT_SYS))
6073	{
6074	Log(("iemMemMap: GCPtrMem=%RGv - user access to kernel page -> #PF\n", GCPtrMem));
6075	# ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
6076	if (Walk.fFailed & PGM_WALKFAIL_EPT)
6077	IEM_VMX_VMEXIT_EPT_RET(pVCpu, &Walk, fAccess, IEM_SLAT_FAIL_LINEAR_TO_PAGE_TABLE, 0 /* cbInstr */);
6078	# endif
6079	iemRaisePageFaultJmp(pVCpu, GCPtrMem, fAccess, VERR_ACCESS_DENIED);
6080	}
6081	}
6082
6083	/*
6084	* Set the dirty / access flags.
6085	* ASSUMES this is set when the address is translated rather than on commit...
6086	*/
6087	/** @todo testcase: check when A and D bits are actually set by the CPU. */
6088	uint64_t const fTlbAccessedDirty = (fAccess & IEM_ACCESS_TYPE_WRITE ? IEMTLBE_F_PT_NO_DIRTY : 0) \| IEMTLBE_F_PT_NO_ACCESSED;
6089	if (pTlbe->fFlagsAndPhysRev & fTlbAccessedDirty)
6090	{
6091	uint32_t const fAccessedDirty = fAccess & IEM_ACCESS_TYPE_WRITE ? X86_PTE_D \| X86_PTE_A : X86_PTE_A;
6092	int rc2 = PGMGstModifyPage(pVCpu, GCPtrMem, 1, fAccessedDirty, ~(uint64_t)fAccessedDirty);
6093	AssertRC(rc2);
6094	/** @todo Nested VMX: Accessed/dirty bit currently not supported, asserted below. */
6095	Assert(!(CPUMGetGuestIa32VmxEptVpidCap(pVCpu) & VMX_BF_EPT_VPID_CAP_ACCESS_DIRTY_MASK));
6096	pTlbe->fFlagsAndPhysRev &= ~fTlbAccessedDirty;
6097	}
6098
6099	/*
6100	* Look up the physical page info if necessary.
6101	*/
6102	uint8_t *pbMem = NULL;
6103	if ((pTlbe->fFlagsAndPhysRev & IEMTLBE_F_PHYS_REV) == pVCpu->iem.s.DataTlb.uTlbPhysRev)
6104	# ifdef IN_RING3
6105	pbMem = pTlbe->pbMappingR3;
6106	# else
6107	pbMem = NULL;
6108	# endif
6109	else
6110	{
6111	AssertCompile(PGMIEMGCPHYS2PTR_F_NO_WRITE == IEMTLBE_F_PG_NO_WRITE);
6112	AssertCompile(PGMIEMGCPHYS2PTR_F_NO_READ == IEMTLBE_F_PG_NO_READ);
6113	AssertCompile(PGMIEMGCPHYS2PTR_F_NO_MAPPINGR3 == IEMTLBE_F_NO_MAPPINGR3);
6114	AssertCompile(PGMIEMGCPHYS2PTR_F_UNASSIGNED == IEMTLBE_F_PG_UNASSIGNED);
6115	if (RT_LIKELY(pVCpu->iem.s.CodeTlb.uTlbPhysRev > IEMTLB_PHYS_REV_INCR))
6116	{ /* likely */ }
6117	else
6118	IEMTlbInvalidateAllPhysicalSlow(pVCpu);
6119	pTlbe->pbMappingR3 = NULL;
6120	pTlbe->fFlagsAndPhysRev &= ~( IEMTLBE_F_PHYS_REV
6121	\| IEMTLBE_F_NO_MAPPINGR3 \| IEMTLBE_F_PG_NO_READ \| IEMTLBE_F_PG_NO_WRITE \| IEMTLBE_F_PG_UNASSIGNED);
6122	int rc = PGMPhysIemGCPhys2PtrNoLock(pVCpu->CTX_SUFF(pVM), pVCpu, pTlbe->GCPhys, &pVCpu->iem.s.DataTlb.uTlbPhysRev,
6123	&pbMem, &pTlbe->fFlagsAndPhysRev);
6124	AssertRCStmt(rc, longjmp(*CTX_SUFF(pVCpu->iem.s.pJmpBuf), rc));
6125	# ifdef IN_RING3
6126	pTlbe->pbMappingR3 = pbMem;
6127	# endif
6128	}
6129
6130	/*
6131	* Check the physical page level access and mapping.
6132	*/
6133	if ( !(pTlbe->fFlagsAndPhysRev & (IEMTLBE_F_PG_NO_WRITE \| IEMTLBE_F_PG_NO_READ))
6134	\|\| !(pTlbe->fFlagsAndPhysRev & ( (fAccess & IEM_ACCESS_TYPE_WRITE ? IEMTLBE_F_PG_NO_WRITE : 0)
6135	\| (fAccess & IEM_ACCESS_TYPE_READ ? IEMTLBE_F_PG_NO_READ : 0))) )
6136	{ /* probably likely */ }
6137	else
6138	return iemMemBounceBufferMapPhys(pVCpu, iMemMap, ppvMem, cbMem,
6139	pTlbe->GCPhys \| (GCPtrMem & GUEST_PAGE_OFFSET_MASK), fAccess,
6140	pTlbe->fFlagsAndPhysRev & IEMTLBE_F_PG_UNASSIGNED ? VERR_PGM_PHYS_TLB_UNASSIGNED
6141	: pTlbe->fFlagsAndPhysRev & IEMTLBE_F_PG_NO_READ ? VERR_PGM_PHYS_TLB_CATCH_ALL
6142	: VERR_PGM_PHYS_TLB_CATCH_WRITE);
6143	Assert(!(pTlbe->fFlagsAndPhysRev & IEMTLBE_F_NO_MAPPINGR3)); /* ASSUMPTIONS about PGMPhysIemGCPhys2PtrNoLock behaviour. */
6144
6145	if (pbMem)
6146	{
6147	Assert(!((uintptr_t)pbMem & GUEST_PAGE_OFFSET_MASK));
6148	pbMem = pbMem + (GCPtrMem & GUEST_PAGE_OFFSET_MASK);
6149	fAccess \|= IEM_ACCESS_NOT_LOCKED;
6150	}
6151	else
6152	{
6153	Assert(!(fAccess & IEM_ACCESS_NOT_LOCKED));
6154	RTGCPHYS const GCPhysFirst = pTlbe->GCPhys \| (GCPtrMem & GUEST_PAGE_OFFSET_MASK);
6155	rcStrict = iemMemPageMap(pVCpu, GCPhysFirst, fAccess, (void **)&pbMem, &pVCpu->iem.s.aMemMappingLocks[iMemMap].Lock);
6156	if (rcStrict != VINF_SUCCESS)
6157	return iemMemBounceBufferMapPhys(pVCpu, iMemMap, ppvMem, cbMem, GCPhysFirst, fAccess, rcStrict);
6158	}
6159
6160	void * const pvMem = pbMem;
6161
6162	if (fAccess & IEM_ACCESS_TYPE_WRITE)
6163	Log8(("IEM WR %RGv (%RGp) LB %#zx\n", GCPtrMem, pTlbe->GCPhys \| (GCPtrMem & GUEST_PAGE_OFFSET_MASK), cbMem));
6164	if (fAccess & IEM_ACCESS_TYPE_READ)
6165	Log9(("IEM RD %RGv (%RGp) LB %#zx\n", GCPtrMem, pTlbe->GCPhys \| (GCPtrMem & GUEST_PAGE_OFFSET_MASK), cbMem));
6166
6167	#else /* !IEM_WITH_DATA_TLB */
6168
6169	RTGCPHYS GCPhysFirst;
6170	rcStrict = iemMemPageTranslateAndCheckAccess(pVCpu, GCPtrMem, fAccess, &GCPhysFirst);
6171	if (rcStrict != VINF_SUCCESS)
6172	return rcStrict;
6173
6174	if (fAccess & IEM_ACCESS_TYPE_WRITE)
6175	Log8(("IEM WR %RGv (%RGp) LB %#zx\n", GCPtrMem, GCPhysFirst, cbMem));
6176	if (fAccess & IEM_ACCESS_TYPE_READ)
6177	Log9(("IEM RD %RGv (%RGp) LB %#zx\n", GCPtrMem, GCPhysFirst, cbMem));
6178
6179	void *pvMem;
6180	rcStrict = iemMemPageMap(pVCpu, GCPhysFirst, fAccess, &pvMem, &pVCpu->iem.s.aMemMappingLocks[iMemMap].Lock);
6181	if (rcStrict != VINF_SUCCESS)
6182	return iemMemBounceBufferMapPhys(pVCpu, iMemMap, ppvMem, cbMem, GCPhysFirst, fAccess, rcStrict);
6183
6184	#endif /* !IEM_WITH_DATA_TLB */
6185
6186	/*
6187	* Fill in the mapping table entry.
6188	*/
6189	pVCpu->iem.s.aMemMappings[iMemMap].pv = pvMem;
6190	pVCpu->iem.s.aMemMappings[iMemMap].fAccess = fAccess;
6191	pVCpu->iem.s.iNextMapping = iMemMap + 1;
6192	pVCpu->iem.s.cActiveMappings += 1;
6193
6194	iemMemUpdateWrittenCounter(pVCpu, fAccess, cbMem);
6195	*ppvMem = pvMem;
6196
6197	return VINF_SUCCESS;
6198	}
6199
6200
6201	/**
6202	* Commits the guest memory if bounce buffered and unmaps it.
6203	*
6204	* @returns Strict VBox status code.
6205	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6206	* @param pvMem The mapping.
6207	* @param fAccess The kind of access.
6208	*/
6209	VBOXSTRICTRC iemMemCommitAndUnmap(PVMCPUCC pVCpu, void *pvMem, uint32_t fAccess) RT_NOEXCEPT
6210	{
6211	int iMemMap = iemMapLookup(pVCpu, pvMem, fAccess);
6212	AssertReturn(iMemMap >= 0, iMemMap);
6213
6214	/* If it's bounce buffered, we may need to write back the buffer. */
6215	if (pVCpu->iem.s.aMemMappings[iMemMap].fAccess & IEM_ACCESS_BOUNCE_BUFFERED)
6216	{
6217	if (pVCpu->iem.s.aMemMappings[iMemMap].fAccess & IEM_ACCESS_TYPE_WRITE)
6218	return iemMemBounceBufferCommitAndUnmap(pVCpu, iMemMap, false /fPostponeFail/);
6219	}
6220	/* Otherwise unlock it. */
6221	else if (!(pVCpu->iem.s.aMemMappings[iMemMap].fAccess & IEM_ACCESS_NOT_LOCKED))
6222	PGMPhysReleasePageMappingLock(pVCpu->CTX_SUFF(pVM), &pVCpu->iem.s.aMemMappingLocks[iMemMap].Lock);
6223
6224	/* Free the entry. */
6225	pVCpu->iem.s.aMemMappings[iMemMap].fAccess = IEM_ACCESS_INVALID;
6226	Assert(pVCpu->iem.s.cActiveMappings != 0);
6227	pVCpu->iem.s.cActiveMappings--;
6228	return VINF_SUCCESS;
6229	}
6230
6231	#ifdef IEM_WITH_SETJMP
6232
6233	/**
6234	* Maps the specified guest memory for the given kind of access, longjmp on
6235	* error.
6236	*
6237	* This may be using bounce buffering of the memory if it's crossing a page
6238	* boundary or if there is an access handler installed for any of it. Because
6239	* of lock prefix guarantees, we're in for some extra clutter when this
6240	* happens.
6241	*
6242	* This may raise a \#GP, \#SS, \#PF or \#AC.
6243	*
6244	* @returns Pointer to the mapped memory.
6245	*
6246	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6247	* @param cbMem The number of bytes to map. This is usually 1,
6248	* 2, 4, 6, 8, 12, 16, 32 or 512. When used by
6249	* string operations it can be up to a page.
6250	* @param iSegReg The index of the segment register to use for
6251	* this access. The base and limits are checked.
6252	* Use UINT8_MAX to indicate that no segmentation
6253	* is required (for IDT, GDT and LDT accesses).
6254	* @param GCPtrMem The address of the guest memory.
6255	* @param fAccess How the memory is being accessed. The
6256	* IEM_ACCESS_TYPE_XXX bit is used to figure out
6257	* how to map the memory, while the
6258	* IEM_ACCESS_WHAT_XXX bit is used when raising
6259	* exceptions.
6260	* @param uAlignCtl Alignment control:
6261	* - Bits 15:0 is the alignment mask.
6262	* - Bits 31:16 for flags like IEM_MEMMAP_F_ALIGN_GP,
6263	* IEM_MEMMAP_F_ALIGN_SSE, and
6264	* IEM_MEMMAP_F_ALIGN_GP_OR_AC.
6265	* Pass zero to skip alignment.
6266	*/
6267	void *iemMemMapJmp(PVMCPUCC pVCpu, size_t cbMem, uint8_t iSegReg, RTGCPTR GCPtrMem, uint32_t fAccess,
6268	uint32_t uAlignCtl) RT_NOEXCEPT
6269	{
6270	/*
6271	* Check the input, check segment access and adjust address
6272	* with segment base.
6273	*/
6274	Assert(cbMem <= 64 \|\| cbMem == 512 \|\| cbMem == 108 \|\| cbMem == 104 \|\| cbMem == 94); /* 512 is the max! */
6275	Assert(~(fAccess & ~(IEM_ACCESS_TYPE_MASK \| IEM_ACCESS_WHAT_MASK)));
6276	Assert(pVCpu->iem.s.cActiveMappings < RT_ELEMENTS(pVCpu->iem.s.aMemMappings));
6277
6278	VBOXSTRICTRC rcStrict = iemMemApplySegment(pVCpu, fAccess, iSegReg, cbMem, &GCPtrMem);
6279	if (rcStrict == VINF_SUCCESS) { /likely/ }
6280	else longjmp(*pVCpu->iem.s.CTX_SUFF(pJmpBuf), VBOXSTRICTRC_VAL(rcStrict));
6281
6282	/*
6283	* Alignment check.
6284	*/
6285	if ( (GCPtrMem & (uAlignCtl & UINT16_MAX)) == 0 )
6286	{ /* likelyish */ }
6287	else
6288	{
6289	/* Misaligned access. */
6290	if ((fAccess & IEM_ACCESS_WHAT_MASK) != IEM_ACCESS_WHAT_SYS)
6291	{
6292	if ( !(uAlignCtl & IEM_MEMMAP_F_ALIGN_GP)
6293	\|\| ( (uAlignCtl & IEM_MEMMAP_F_ALIGN_SSE)
6294	&& (pVCpu->cpum.GstCtx.XState.x87.MXCSR & X86_MXCSR_MM)) )
6295	{
6296	AssertCompile(X86_CR0_AM == X86_EFL_AC);
6297
6298	if (iemMemAreAlignmentChecksEnabled(pVCpu))
6299	iemRaiseAlignmentCheckExceptionJmp(pVCpu);
6300	}
6301	else if ( (uAlignCtl & IEM_MEMMAP_F_ALIGN_GP_OR_AC)
6302	&& iemMemAreAlignmentChecksEnabled(pVCpu)
6303	/** @todo may only apply to 2, 4 or 8 byte misalignments depending on the CPU
6304	* implementation. See FXSAVE/FRSTOR/XSAVE/XRSTOR/++. */
6305	)
6306	iemRaiseAlignmentCheckExceptionJmp(pVCpu);
6307	else
6308	iemRaiseGeneralProtectionFault0Jmp(pVCpu);
6309	}
6310	}
6311
6312	/*
6313	* Figure out which mapping entry to use.
6314	*/
6315	unsigned iMemMap = pVCpu->iem.s.iNextMapping;
6316	if ( iMemMap >= RT_ELEMENTS(pVCpu->iem.s.aMemMappings)
6317	\|\| pVCpu->iem.s.aMemMappings[iMemMap].fAccess != IEM_ACCESS_INVALID)
6318	{
6319	iMemMap = iemMemMapFindFree(pVCpu);
6320	AssertLogRelMsgStmt(iMemMap < RT_ELEMENTS(pVCpu->iem.s.aMemMappings),
6321	("active=%d fAccess[0] = {%#x, %#x, %#x}\n", pVCpu->iem.s.cActiveMappings,
6322	pVCpu->iem.s.aMemMappings[0].fAccess, pVCpu->iem.s.aMemMappings[1].fAccess,
6323	pVCpu->iem.s.aMemMappings[2].fAccess),
6324	longjmp(*pVCpu->iem.s.CTX_SUFF(pJmpBuf), VERR_IEM_IPE_9));
6325	}
6326
6327	/*
6328	* Crossing a page boundary?
6329	*/
6330	if ((GCPtrMem & GUEST_PAGE_OFFSET_MASK) + cbMem <= GUEST_PAGE_SIZE)
6331	{ /* No (likely). */ }
6332	else
6333	{
6334	void *pvMem;
6335	rcStrict = iemMemBounceBufferMapCrossPage(pVCpu, iMemMap, &pvMem, cbMem, GCPtrMem, fAccess);
6336	if (rcStrict == VINF_SUCCESS)
6337	return pvMem;
6338	longjmp(*pVCpu->iem.s.CTX_SUFF(pJmpBuf), VBOXSTRICTRC_VAL(rcStrict));
6339	}
6340
6341	#ifdef IEM_WITH_DATA_TLB
6342	Assert(!(fAccess & IEM_ACCESS_TYPE_EXEC));
6343
6344	/*
6345	* Get the TLB entry for this page.
6346	*/
6347	uint64_t const uTag = IEMTLB_CALC_TAG( &pVCpu->iem.s.DataTlb, GCPtrMem);
6348	PIEMTLBENTRY const pTlbe = IEMTLB_TAG_TO_ENTRY(&pVCpu->iem.s.DataTlb, uTag);
6349	if (pTlbe->uTag == uTag)
6350	STAM_STATS({pVCpu->iem.s.DataTlb.cTlbHits++;});
6351	else
6352	{
6353	pVCpu->iem.s.DataTlb.cTlbMisses++;
6354	PGMPTWALK Walk;
6355	int rc = PGMGstGetPage(pVCpu, GCPtrMem, &Walk);
6356	if (RT_FAILURE(rc))
6357	{
6358	Log(("iemMemMap: GCPtrMem=%RGv - failed to fetch page -> #PF\n", GCPtrMem));
6359	# ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
6360	if (Walk.fFailed & PGM_WALKFAIL_EPT)
6361	IEM_VMX_VMEXIT_EPT_RET(pVCpu, &Walk, fAccess, IEM_SLAT_FAIL_LINEAR_TO_PHYS_ADDR, 0 /* cbInstr */);
6362	# endif
6363	iemRaisePageFaultJmp(pVCpu, GCPtrMem, fAccess, rc);
6364	}
6365
6366	Assert(Walk.fSucceeded);
6367	pTlbe->uTag = uTag;
6368	pTlbe->fFlagsAndPhysRev = ~Walk.fEffective & (X86_PTE_US \| X86_PTE_RW \| X86_PTE_D \| X86_PTE_A); /* skipping NX */
6369	pTlbe->GCPhys = Walk.GCPhys;
6370	pTlbe->pbMappingR3 = NULL;
6371	}
6372
6373	/*
6374	* Check the flags and physical revision.
6375	*/
6376	/** @todo make the caller pass these in with fAccess. */
6377	uint64_t const fNoUser = (fAccess & IEM_ACCESS_WHAT_MASK) != IEM_ACCESS_WHAT_SYS && pVCpu->iem.s.uCpl == 3
6378	? IEMTLBE_F_PT_NO_USER : 0;
6379	uint64_t const fNoWriteNoDirty = fAccess & IEM_ACCESS_TYPE_WRITE
6380	? IEMTLBE_F_PG_NO_WRITE \| IEMTLBE_F_PT_NO_DIRTY
6381	\| ( (pVCpu->cpum.GstCtx.cr0 & X86_CR0_WP)
6382	\|\| (pVCpu->iem.s.uCpl == 3 && (fAccess & IEM_ACCESS_WHAT_MASK) != IEM_ACCESS_WHAT_SYS)
6383	? IEMTLBE_F_PT_NO_WRITE : 0)
6384	: 0;
6385	uint64_t const fNoRead = fAccess & IEM_ACCESS_TYPE_READ ? IEMTLBE_F_PG_NO_READ : 0;
6386	uint8_t *pbMem = NULL;
6387	if ( (pTlbe->fFlagsAndPhysRev & (IEMTLBE_F_PHYS_REV \| IEMTLBE_F_PT_NO_ACCESSED \| fNoRead \| fNoWriteNoDirty \| fNoUser))
6388	== pVCpu->iem.s.DataTlb.uTlbPhysRev)
6389	# ifdef IN_RING3
6390	pbMem = pTlbe->pbMappingR3;
6391	# else
6392	pbMem = NULL;
6393	# endif
6394	else
6395	{
6396	/*
6397	* Okay, something isn't quite right or needs refreshing.
6398	*/
6399	/* Write to read only memory? */
6400	if (pTlbe->fFlagsAndPhysRev & fNoWriteNoDirty & IEMTLBE_F_PT_NO_WRITE)
6401	{
6402	Log(("iemMemMapJmp: GCPtrMem=%RGv - read-only page -> #PF\n", GCPtrMem));
6403	# ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
6404	if (Walk.fFailed & PGM_WALKFAIL_EPT)
6405	IEM_VMX_VMEXIT_EPT_RET(pVCpu, &Walk, fAccess, IEM_SLAT_FAIL_LINEAR_TO_PAGE_TABLE, 0 /* cbInstr */);
6406	# endif
6407	iemRaisePageFaultJmp(pVCpu, GCPtrMem, fAccess & ~IEM_ACCESS_TYPE_READ, VERR_ACCESS_DENIED);
6408	}
6409
6410	/* Kernel memory accessed by userland? */
6411	if (pTlbe->fFlagsAndPhysRev & fNoUser & IEMTLBE_F_PT_NO_USER)
6412	{
6413	Log(("iemMemMapJmp: GCPtrMem=%RGv - user access to kernel page -> #PF\n", GCPtrMem));
6414	# ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
6415	if (Walk.fFailed & PGM_WALKFAIL_EPT)
6416	IEM_VMX_VMEXIT_EPT_RET(pVCpu, &Walk, fAccess, IEM_SLAT_FAIL_LINEAR_TO_PAGE_TABLE, 0 /* cbInstr */);
6417	# endif
6418	iemRaisePageFaultJmp(pVCpu, GCPtrMem, fAccess, VERR_ACCESS_DENIED);
6419	}
6420
6421	/* Set the dirty / access flags.
6422	ASSUMES this is set when the address is translated rather than on commit... */
6423	/** @todo testcase: check when A and D bits are actually set by the CPU. */
6424	if (pTlbe->fFlagsAndPhysRev & ((fNoWriteNoDirty & IEMTLBE_F_PT_NO_DIRTY) \| IEMTLBE_F_PT_NO_ACCESSED))
6425	{
6426	uint32_t const fAccessedDirty = fAccess & IEM_ACCESS_TYPE_WRITE ? X86_PTE_D \| X86_PTE_A : X86_PTE_A;
6427	int rc2 = PGMGstModifyPage(pVCpu, GCPtrMem, 1, fAccessedDirty, ~(uint64_t)fAccessedDirty);
6428	AssertRC(rc2);
6429	/** @todo Nested VMX: Accessed/dirty bit currently not supported, asserted below. */
6430	Assert(!(CPUMGetGuestIa32VmxEptVpidCap(pVCpu) & VMX_BF_EPT_VPID_CAP_ACCESS_DIRTY_MASK));
6431	pTlbe->fFlagsAndPhysRev &= ~((fNoWriteNoDirty & IEMTLBE_F_PT_NO_DIRTY) \| IEMTLBE_F_PT_NO_ACCESSED);
6432	}
6433
6434	/*
6435	* Check if the physical page info needs updating.
6436	*/
6437	if ((pTlbe->fFlagsAndPhysRev & IEMTLBE_F_PHYS_REV) == pVCpu->iem.s.DataTlb.uTlbPhysRev)
6438	# ifdef IN_RING3
6439	pbMem = pTlbe->pbMappingR3;
6440	# else
6441	pbMem = NULL;
6442	# endif
6443	else
6444	{
6445	AssertCompile(PGMIEMGCPHYS2PTR_F_NO_WRITE == IEMTLBE_F_PG_NO_WRITE);
6446	AssertCompile(PGMIEMGCPHYS2PTR_F_NO_READ == IEMTLBE_F_PG_NO_READ);
6447	AssertCompile(PGMIEMGCPHYS2PTR_F_NO_MAPPINGR3 == IEMTLBE_F_NO_MAPPINGR3);
6448	AssertCompile(PGMIEMGCPHYS2PTR_F_UNASSIGNED == IEMTLBE_F_PG_UNASSIGNED);
6449	pTlbe->pbMappingR3 = NULL;
6450	pTlbe->fFlagsAndPhysRev &= ~( IEMTLBE_F_PHYS_REV
6451	\| IEMTLBE_F_NO_MAPPINGR3 \| IEMTLBE_F_PG_NO_READ \| IEMTLBE_F_PG_NO_WRITE \| IEMTLBE_F_PG_UNASSIGNED);
6452	int rc = PGMPhysIemGCPhys2PtrNoLock(pVCpu->CTX_SUFF(pVM), pVCpu, pTlbe->GCPhys, &pVCpu->iem.s.DataTlb.uTlbPhysRev,
6453	&pbMem, &pTlbe->fFlagsAndPhysRev);
6454	AssertRCStmt(rc, longjmp(*CTX_SUFF(pVCpu->iem.s.pJmpBuf), rc));
6455	# ifdef IN_RING3
6456	pTlbe->pbMappingR3 = pbMem;
6457	# endif
6458	}
6459
6460	/*
6461	* Check the physical page level access and mapping.
6462	*/
6463	if (!(pTlbe->fFlagsAndPhysRev & ((fNoWriteNoDirty \| fNoRead) & (IEMTLBE_F_PG_NO_WRITE \| IEMTLBE_F_PG_NO_READ))))
6464	{ /* probably likely */ }
6465	else
6466	{
6467	rcStrict = iemMemBounceBufferMapPhys(pVCpu, iMemMap, (void **)&pbMem, cbMem,
6468	pTlbe->GCPhys \| (GCPtrMem & GUEST_PAGE_OFFSET_MASK), fAccess,
6469	pTlbe->fFlagsAndPhysRev & IEMTLBE_F_PG_UNASSIGNED ? VERR_PGM_PHYS_TLB_UNASSIGNED
6470	: pTlbe->fFlagsAndPhysRev & IEMTLBE_F_PG_NO_READ ? VERR_PGM_PHYS_TLB_CATCH_ALL
6471	: VERR_PGM_PHYS_TLB_CATCH_WRITE);
6472	if (rcStrict == VINF_SUCCESS)
6473	return pbMem;
6474	longjmp(*pVCpu->iem.s.CTX_SUFF(pJmpBuf), VBOXSTRICTRC_VAL(rcStrict));
6475	}
6476	}
6477	Assert(!(pTlbe->fFlagsAndPhysRev & IEMTLBE_F_NO_MAPPINGR3)); /* ASSUMPTIONS about PGMPhysIemGCPhys2PtrNoLock behaviour. */
6478
6479	if (pbMem)
6480	{
6481	Assert(!((uintptr_t)pbMem & GUEST_PAGE_OFFSET_MASK));
6482	pbMem = pbMem + (GCPtrMem & GUEST_PAGE_OFFSET_MASK);
6483	fAccess \|= IEM_ACCESS_NOT_LOCKED;
6484	}
6485	else
6486	{
6487	Assert(!(fAccess & IEM_ACCESS_NOT_LOCKED));
6488	RTGCPHYS const GCPhysFirst = pTlbe->GCPhys \| (GCPtrMem & GUEST_PAGE_OFFSET_MASK);
6489	rcStrict = iemMemPageMap(pVCpu, GCPhysFirst, fAccess, (void **)&pbMem, &pVCpu->iem.s.aMemMappingLocks[iMemMap].Lock);
6490	if (rcStrict == VINF_SUCCESS)
6491	return pbMem;
6492	longjmp(*pVCpu->iem.s.CTX_SUFF(pJmpBuf), VBOXSTRICTRC_VAL(rcStrict));
6493	}
6494
6495	void * const pvMem = pbMem;
6496
6497	if (fAccess & IEM_ACCESS_TYPE_WRITE)
6498	Log8(("IEM WR %RGv (%RGp) LB %#zx\n", GCPtrMem, pTlbe->GCPhys \| (GCPtrMem & GUEST_PAGE_OFFSET_MASK), cbMem));
6499	if (fAccess & IEM_ACCESS_TYPE_READ)
6500	Log9(("IEM RD %RGv (%RGp) LB %#zx\n", GCPtrMem, pTlbe->GCPhys \| (GCPtrMem & GUEST_PAGE_OFFSET_MASK), cbMem));
6501
6502	#else /* !IEM_WITH_DATA_TLB */
6503
6504
6505	RTGCPHYS GCPhysFirst;
6506	rcStrict = iemMemPageTranslateAndCheckAccess(pVCpu, GCPtrMem, fAccess, &GCPhysFirst);
6507	if (rcStrict == VINF_SUCCESS) { /likely/ }
6508	else longjmp(*pVCpu->iem.s.CTX_SUFF(pJmpBuf), VBOXSTRICTRC_VAL(rcStrict));
6509
6510	if (fAccess & IEM_ACCESS_TYPE_WRITE)
6511	Log8(("IEM WR %RGv (%RGp) LB %#zx\n", GCPtrMem, GCPhysFirst, cbMem));
6512	if (fAccess & IEM_ACCESS_TYPE_READ)
6513	Log9(("IEM RD %RGv (%RGp) LB %#zx\n", GCPtrMem, GCPhysFirst, cbMem));
6514
6515	void *pvMem;
6516	rcStrict = iemMemPageMap(pVCpu, GCPhysFirst, fAccess, &pvMem, &pVCpu->iem.s.aMemMappingLocks[iMemMap].Lock);
6517	if (rcStrict == VINF_SUCCESS)
6518	{ /* likely */ }
6519	else
6520	{
6521	rcStrict = iemMemBounceBufferMapPhys(pVCpu, iMemMap, &pvMem, cbMem, GCPhysFirst, fAccess, rcStrict);
6522	if (rcStrict == VINF_SUCCESS)
6523	return pvMem;
6524	longjmp(*pVCpu->iem.s.CTX_SUFF(pJmpBuf), VBOXSTRICTRC_VAL(rcStrict));
6525	}
6526
6527	#endif /* !IEM_WITH_DATA_TLB */
6528
6529	/*
6530	* Fill in the mapping table entry.
6531	*/
6532	pVCpu->iem.s.aMemMappings[iMemMap].pv = pvMem;
6533	pVCpu->iem.s.aMemMappings[iMemMap].fAccess = fAccess;
6534	pVCpu->iem.s.iNextMapping = iMemMap + 1;
6535	pVCpu->iem.s.cActiveMappings++;
6536
6537	iemMemUpdateWrittenCounter(pVCpu, fAccess, cbMem);
6538	return pvMem;
6539	}
6540
6541
6542	/**
6543	* Commits the guest memory if bounce buffered and unmaps it, longjmp on error.
6544	*
6545	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6546	* @param pvMem The mapping.
6547	* @param fAccess The kind of access.
6548	*/
6549	void iemMemCommitAndUnmapJmp(PVMCPUCC pVCpu, void *pvMem, uint32_t fAccess) RT_NOEXCEPT
6550	{
6551	int iMemMap = iemMapLookup(pVCpu, pvMem, fAccess);
6552	AssertStmt(iMemMap >= 0, longjmp(*pVCpu->iem.s.CTX_SUFF(pJmpBuf), iMemMap));
6553
6554	/* If it's bounce buffered, we may need to write back the buffer. */
6555	if (pVCpu->iem.s.aMemMappings[iMemMap].fAccess & IEM_ACCESS_BOUNCE_BUFFERED)
6556	{
6557	if (pVCpu->iem.s.aMemMappings[iMemMap].fAccess & IEM_ACCESS_TYPE_WRITE)
6558	{
6559	VBOXSTRICTRC rcStrict = iemMemBounceBufferCommitAndUnmap(pVCpu, iMemMap, false /fPostponeFail/);
6560	if (rcStrict == VINF_SUCCESS)
6561	return;
6562	longjmp(*pVCpu->iem.s.CTX_SUFF(pJmpBuf), VBOXSTRICTRC_VAL(rcStrict));
6563	}
6564	}
6565	/* Otherwise unlock it. */
6566	else if (!(pVCpu->iem.s.aMemMappings[iMemMap].fAccess & IEM_ACCESS_NOT_LOCKED))
6567	PGMPhysReleasePageMappingLock(pVCpu->CTX_SUFF(pVM), &pVCpu->iem.s.aMemMappingLocks[iMemMap].Lock);
6568
6569	/* Free the entry. */
6570	pVCpu->iem.s.aMemMappings[iMemMap].fAccess = IEM_ACCESS_INVALID;
6571	Assert(pVCpu->iem.s.cActiveMappings != 0);
6572	pVCpu->iem.s.cActiveMappings--;
6573	}
6574
6575	#endif /* IEM_WITH_SETJMP */
6576
6577	#ifndef IN_RING3
6578	/**
6579	* Commits the guest memory if bounce buffered and unmaps it, if any bounce
6580	* buffer part shows trouble it will be postponed to ring-3 (sets FF and stuff).
6581	*
6582	* Allows the instruction to be completed and retired, while the IEM user will
6583	* return to ring-3 immediately afterwards and do the postponed writes there.
6584	*
6585	* @returns VBox status code (no strict statuses). Caller must check
6586	* VMCPU_FF_IEM before repeating string instructions and similar stuff.
6587	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6588	* @param pvMem The mapping.
6589	* @param fAccess The kind of access.
6590	*/
6591	VBOXSTRICTRC iemMemCommitAndUnmapPostponeTroubleToR3(PVMCPUCC pVCpu, void *pvMem, uint32_t fAccess) RT_NOEXCEPT
6592	{
6593	int iMemMap = iemMapLookup(pVCpu, pvMem, fAccess);
6594	AssertReturn(iMemMap >= 0, iMemMap);
6595
6596	/* If it's bounce buffered, we may need to write back the buffer. */
6597	if (pVCpu->iem.s.aMemMappings[iMemMap].fAccess & IEM_ACCESS_BOUNCE_BUFFERED)
6598	{
6599	if (pVCpu->iem.s.aMemMappings[iMemMap].fAccess & IEM_ACCESS_TYPE_WRITE)
6600	return iemMemBounceBufferCommitAndUnmap(pVCpu, iMemMap, true /fPostponeFail/);
6601	}
6602	/* Otherwise unlock it. */
6603	else if (!(pVCpu->iem.s.aMemMappings[iMemMap].fAccess & IEM_ACCESS_NOT_LOCKED))
6604	PGMPhysReleasePageMappingLock(pVCpu->CTX_SUFF(pVM), &pVCpu->iem.s.aMemMappingLocks[iMemMap].Lock);
6605
6606	/* Free the entry. */
6607	pVCpu->iem.s.aMemMappings[iMemMap].fAccess = IEM_ACCESS_INVALID;
6608	Assert(pVCpu->iem.s.cActiveMappings != 0);
6609	pVCpu->iem.s.cActiveMappings--;
6610	return VINF_SUCCESS;
6611	}
6612	#endif
6613
6614
6615	/**
6616	* Rollbacks mappings, releasing page locks and such.
6617	*
6618	* The caller shall only call this after checking cActiveMappings.
6619	*
6620	* @returns Strict VBox status code to pass up.
6621	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6622	*/
6623	void iemMemRollback(PVMCPUCC pVCpu) RT_NOEXCEPT
6624	{
6625	Assert(pVCpu->iem.s.cActiveMappings > 0);
6626
6627	uint32_t iMemMap = RT_ELEMENTS(pVCpu->iem.s.aMemMappings);
6628	while (iMemMap-- > 0)
6629	{
6630	uint32_t const fAccess = pVCpu->iem.s.aMemMappings[iMemMap].fAccess;
6631	if (fAccess != IEM_ACCESS_INVALID)
6632	{
6633	AssertMsg(!(fAccess & ~IEM_ACCESS_VALID_MASK) && fAccess != 0, ("%#x\n", fAccess));
6634	pVCpu->iem.s.aMemMappings[iMemMap].fAccess = IEM_ACCESS_INVALID;
6635	if (!(fAccess & (IEM_ACCESS_BOUNCE_BUFFERED \| IEM_ACCESS_NOT_LOCKED)))
6636	PGMPhysReleasePageMappingLock(pVCpu->CTX_SUFF(pVM), &pVCpu->iem.s.aMemMappingLocks[iMemMap].Lock);
6637	AssertMsg(pVCpu->iem.s.cActiveMappings > 0,
6638	("iMemMap=%u fAccess=%#x pv=%p GCPhysFirst=%RGp GCPhysSecond=%RGp\n",
6639	iMemMap, fAccess, pVCpu->iem.s.aMemMappings[iMemMap].pv,
6640	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst, pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond));
6641	pVCpu->iem.s.cActiveMappings--;
6642	}
6643	}
6644	}
6645
6646
6647	/**
6648	* Fetches a data byte.
6649	*
6650	* @returns Strict VBox status code.
6651	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6652	* @param pu8Dst Where to return the byte.
6653	* @param iSegReg The index of the segment register to use for
6654	* this access. The base and limits are checked.
6655	* @param GCPtrMem The address of the guest memory.
6656	*/
6657	VBOXSTRICTRC iemMemFetchDataU8(PVMCPUCC pVCpu, uint8_t *pu8Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
6658	{
6659	/* The lazy approach for now... */
6660	uint8_t const *pu8Src;
6661	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu8Src, sizeof(pu8Src), iSegReg, GCPtrMem, IEM_ACCESS_DATA_R, 0);
6662	if (rc == VINF_SUCCESS)
6663	{
6664	pu8Dst = pu8Src;
6665	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu8Src, IEM_ACCESS_DATA_R);
6666	}
6667	return rc;
6668	}
6669
6670
6671	#ifdef IEM_WITH_SETJMP
6672	/**
6673	* Fetches a data byte, longjmp on error.
6674	*
6675	* @returns The byte.
6676	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6677	* @param iSegReg The index of the segment register to use for
6678	* this access. The base and limits are checked.
6679	* @param GCPtrMem The address of the guest memory.
6680	*/
6681	uint8_t iemMemFetchDataU8Jmp(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
6682	{
6683	/* The lazy approach for now... */
6684	uint8_t const pu8Src = (uint8_t const )iemMemMapJmp(pVCpu, sizeof(*pu8Src), iSegReg, GCPtrMem, IEM_ACCESS_DATA_R, 0);
6685	uint8_t const bRet = *pu8Src;
6686	iemMemCommitAndUnmapJmp(pVCpu, (void *)pu8Src, IEM_ACCESS_DATA_R);
6687	return bRet;
6688	}
6689	#endif /* IEM_WITH_SETJMP */
6690
6691
6692	/**
6693	* Fetches a data word.
6694	*
6695	* @returns Strict VBox status code.
6696	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6697	* @param pu16Dst Where to return the word.
6698	* @param iSegReg The index of the segment register to use for
6699	* this access. The base and limits are checked.
6700	* @param GCPtrMem The address of the guest memory.
6701	*/
6702	VBOXSTRICTRC iemMemFetchDataU16(PVMCPUCC pVCpu, uint16_t *pu16Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
6703	{
6704	/* The lazy approach for now... */
6705	uint16_t const *pu16Src;
6706	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu16Src, sizeof(pu16Src), iSegReg, GCPtrMem,
6707	IEM_ACCESS_DATA_R, sizeof(*pu16Src) - 1);
6708	if (rc == VINF_SUCCESS)
6709	{
6710	pu16Dst = pu16Src;
6711	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu16Src, IEM_ACCESS_DATA_R);
6712	}
6713	return rc;
6714	}
6715
6716
6717	#ifdef IEM_WITH_SETJMP
6718	/**
6719	* Fetches a data word, longjmp on error.
6720	*
6721	* @returns The word
6722	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6723	* @param iSegReg The index of the segment register to use for
6724	* this access. The base and limits are checked.
6725	* @param GCPtrMem The address of the guest memory.
6726	*/
6727	uint16_t iemMemFetchDataU16Jmp(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
6728	{
6729	/* The lazy approach for now... */
6730	uint16_t const pu16Src = (uint16_t const )iemMemMapJmp(pVCpu, sizeof(*pu16Src), iSegReg, GCPtrMem, IEM_ACCESS_DATA_R,
6731	sizeof(*pu16Src) - 1);
6732	uint16_t const u16Ret = *pu16Src;
6733	iemMemCommitAndUnmapJmp(pVCpu, (void *)pu16Src, IEM_ACCESS_DATA_R);
6734	return u16Ret;
6735	}
6736	#endif
6737
6738
6739	/**
6740	* Fetches a data dword.
6741	*
6742	* @returns Strict VBox status code.
6743	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6744	* @param pu32Dst Where to return the dword.
6745	* @param iSegReg The index of the segment register to use for
6746	* this access. The base and limits are checked.
6747	* @param GCPtrMem The address of the guest memory.
6748	*/
6749	VBOXSTRICTRC iemMemFetchDataU32(PVMCPUCC pVCpu, uint32_t *pu32Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
6750	{
6751	/* The lazy approach for now... */
6752	uint32_t const *pu32Src;
6753	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu32Src, sizeof(pu32Src), iSegReg, GCPtrMem,
6754	IEM_ACCESS_DATA_R, sizeof(*pu32Src) - 1);
6755	if (rc == VINF_SUCCESS)
6756	{
6757	pu32Dst = pu32Src;
6758	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu32Src, IEM_ACCESS_DATA_R);
6759	}
6760	return rc;
6761	}
6762
6763
6764	/**
6765	* Fetches a data dword and zero extends it to a qword.
6766	*
6767	* @returns Strict VBox status code.
6768	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6769	* @param pu64Dst Where to return the qword.
6770	* @param iSegReg The index of the segment register to use for
6771	* this access. The base and limits are checked.
6772	* @param GCPtrMem The address of the guest memory.
6773	*/
6774	VBOXSTRICTRC iemMemFetchDataU32_ZX_U64(PVMCPUCC pVCpu, uint64_t *pu64Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
6775	{
6776	/* The lazy approach for now... */
6777	uint32_t const *pu32Src;
6778	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu32Src, sizeof(pu32Src), iSegReg, GCPtrMem,
6779	IEM_ACCESS_DATA_R, sizeof(*pu32Src) - 1);
6780	if (rc == VINF_SUCCESS)
6781	{
6782	pu64Dst = pu32Src;
6783	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu32Src, IEM_ACCESS_DATA_R);
6784	}
6785	return rc;
6786	}
6787
6788
6789	#ifdef IEM_WITH_SETJMP
6790
6791	/**
6792	* Fetches a data dword, longjmp on error, fallback/safe version.
6793	*
6794	* @returns The dword
6795	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6796	* @param iSegReg The index of the segment register to use for
6797	* this access. The base and limits are checked.
6798	* @param GCPtrMem The address of the guest memory.
6799	*/
6800	uint32_t iemMemFetchDataU32SafeJmp(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
6801	{
6802	uint32_t const pu32Src = (uint32_t const )iemMemMapJmp(pVCpu, sizeof(*pu32Src), iSegReg, GCPtrMem, IEM_ACCESS_DATA_R,
6803	sizeof(*pu32Src) - 1);
6804	uint32_t const u32Ret = *pu32Src;
6805	iemMemCommitAndUnmapJmp(pVCpu, (void *)pu32Src, IEM_ACCESS_DATA_R);
6806	return u32Ret;
6807	}
6808
6809
6810	/**
6811	* Fetches a data dword, longjmp on error.
6812	*
6813	* @returns The dword
6814	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6815	* @param iSegReg The index of the segment register to use for
6816	* this access. The base and limits are checked.
6817	* @param GCPtrMem The address of the guest memory.
6818	*/
6819	uint32_t iemMemFetchDataU32Jmp(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
6820	{
6821	# if defined(IEM_WITH_DATA_TLB) && defined(IN_RING3)
6822	/*
6823	* Convert from segmented to flat address and check that it doesn't cross a page boundrary.
6824	*/
6825	RTGCPTR GCPtrEff = iemMemApplySegmentToReadJmp(pVCpu, iSegReg, sizeof(uint32_t), GCPtrMem);
6826	if (RT_LIKELY((GCPtrEff & GUEST_PAGE_OFFSET_MASK) <= GUEST_PAGE_SIZE - sizeof(uint32_t)))
6827	{
6828	/*
6829	* TLB lookup.
6830	*/
6831	uint64_t const uTag = IEMTLB_CALC_TAG( &pVCpu->iem.s.DataTlb, GCPtrEff);
6832	PIEMTLBENTRY pTlbe = IEMTLB_TAG_TO_ENTRY(&pVCpu->iem.s.DataTlb, uTag);
6833	if (pTlbe->uTag == uTag)
6834	{
6835	/*
6836	* Check TLB page table level access flags.
6837	*/
6838	uint64_t const fNoUser = pVCpu->iem.s.uCpl == 3 ? IEMTLBE_F_PT_NO_USER : 0;
6839	if ( (pTlbe->fFlagsAndPhysRev & ( IEMTLBE_F_PHYS_REV \| IEMTLBE_F_PG_UNASSIGNED \| IEMTLBE_F_PG_NO_READ
6840	\| IEMTLBE_F_PT_NO_ACCESSED \| IEMTLBE_F_NO_MAPPINGR3 \| fNoUser))
6841	== pVCpu->iem.s.DataTlb.uTlbPhysRev)
6842	{
6843	STAM_STATS({pVCpu->iem.s.DataTlb.cTlbHits++;});
6844
6845	/*
6846	* Alignment check:
6847	*/
6848	/** @todo check priority \#AC vs \#PF */
6849	if ( !(GCPtrEff & (sizeof(uint32_t) - 1))
6850	\|\| !(pVCpu->cpum.GstCtx.cr0 & X86_CR0_AM)
6851	\|\| !pVCpu->cpum.GstCtx.eflags.Bits.u1AC
6852	\|\| pVCpu->iem.s.uCpl != 3)
6853	{
6854	/*
6855	* Fetch and return the dword
6856	*/
6857	Assert(pTlbe->pbMappingR3); /* (Only ever cleared by the owning EMT.) */
6858	Assert(!((uintptr_t)pTlbe->pbMappingR3 & GUEST_PAGE_OFFSET_MASK));
6859	return (uint32_t const )&pTlbe->pbMappingR3[GCPtrEff & GUEST_PAGE_OFFSET_MASK];
6860	}
6861	Log10(("iemMemFetchDataU32Jmp: Raising #AC for %RGv\n", GCPtrEff));
6862	iemRaiseAlignmentCheckExceptionJmp(pVCpu);
6863	}
6864	}
6865	}
6866
6867	/* Fall back on the slow careful approach in case of TLB miss, MMIO, exception
6868	outdated page pointer, or other troubles. */
6869	Log10(("iemMemFetchDataU32Jmp: %u:%RGv fallback\n", iSegReg, GCPtrMem));
6870	return iemMemFetchDataU32SafeJmp(pVCpu, iSegReg, GCPtrMem);
6871
6872	# else
6873	uint32_t const pu32Src = (uint32_t const )iemMemMapJmp(pVCpu, sizeof(*pu32Src), iSegReg, GCPtrMem,
6874	IEM_ACCESS_DATA_R, sizeof(*pu32Src) - 1);
6875	uint32_t const u32Ret = *pu32Src;
6876	iemMemCommitAndUnmapJmp(pVCpu, (void *)pu32Src, IEM_ACCESS_DATA_R);
6877	return u32Ret;
6878	# endif
6879	}
6880	#endif
6881
6882
6883	#ifdef SOME_UNUSED_FUNCTION
6884	/**
6885	* Fetches a data dword and sign extends it to a qword.
6886	*
6887	* @returns Strict VBox status code.
6888	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6889	* @param pu64Dst Where to return the sign extended value.
6890	* @param iSegReg The index of the segment register to use for
6891	* this access. The base and limits are checked.
6892	* @param GCPtrMem The address of the guest memory.
6893	*/
6894	VBOXSTRICTRC iemMemFetchDataS32SxU64(PVMCPUCC pVCpu, uint64_t *pu64Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
6895	{
6896	/* The lazy approach for now... */
6897	int32_t const *pi32Src;
6898	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pi32Src, sizeof(pi32Src), iSegReg, GCPtrMem,
6899	IEM_ACCESS_DATA_R, sizeof(*pi32Src) - 1);
6900	if (rc == VINF_SUCCESS)
6901	{
6902	pu64Dst = pi32Src;
6903	rc = iemMemCommitAndUnmap(pVCpu, (void *)pi32Src, IEM_ACCESS_DATA_R);
6904	}
6905	#ifdef __GNUC__ /* warning: GCC may be a royal pain */
6906	else
6907	*pu64Dst = 0;
6908	#endif
6909	return rc;
6910	}
6911	#endif
6912
6913
6914	/**
6915	* Fetches a data qword.
6916	*
6917	* @returns Strict VBox status code.
6918	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6919	* @param pu64Dst Where to return the qword.
6920	* @param iSegReg The index of the segment register to use for
6921	* this access. The base and limits are checked.
6922	* @param GCPtrMem The address of the guest memory.
6923	*/
6924	VBOXSTRICTRC iemMemFetchDataU64(PVMCPUCC pVCpu, uint64_t *pu64Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
6925	{
6926	/* The lazy approach for now... */
6927	uint64_t const *pu64Src;
6928	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu64Src, sizeof(pu64Src), iSegReg, GCPtrMem,
6929	IEM_ACCESS_DATA_R, sizeof(*pu64Src) - 1);
6930	if (rc == VINF_SUCCESS)
6931	{
6932	pu64Dst = pu64Src;
6933	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu64Src, IEM_ACCESS_DATA_R);
6934	}
6935	return rc;
6936	}
6937
6938
6939	#ifdef IEM_WITH_SETJMP
6940	/**
6941	* Fetches a data qword, longjmp on error.
6942	*
6943	* @returns The qword.
6944	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6945	* @param iSegReg The index of the segment register to use for
6946	* this access. The base and limits are checked.
6947	* @param GCPtrMem The address of the guest memory.
6948	*/
6949	uint64_t iemMemFetchDataU64Jmp(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
6950	{
6951	/* The lazy approach for now... */
6952	uint64_t const pu64Src = (uint64_t const )iemMemMapJmp(pVCpu, sizeof(*pu64Src), iSegReg, GCPtrMem,
6953	IEM_ACCESS_DATA_R, sizeof(*pu64Src) - 1);
6954	uint64_t const u64Ret = *pu64Src;
6955	iemMemCommitAndUnmapJmp(pVCpu, (void *)pu64Src, IEM_ACCESS_DATA_R);
6956	return u64Ret;
6957	}
6958	#endif
6959
6960
6961	/**
6962	* Fetches a data qword, aligned at a 16 byte boundrary (for SSE).
6963	*
6964	* @returns Strict VBox status code.
6965	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6966	* @param pu64Dst Where to return the qword.
6967	* @param iSegReg The index of the segment register to use for
6968	* this access. The base and limits are checked.
6969	* @param GCPtrMem The address of the guest memory.
6970	*/
6971	VBOXSTRICTRC iemMemFetchDataU64AlignedU128(PVMCPUCC pVCpu, uint64_t *pu64Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
6972	{
6973	/* The lazy approach for now... */
6974	uint64_t const *pu64Src;
6975	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu64Src, sizeof(pu64Src), iSegReg, GCPtrMem,
6976	IEM_ACCESS_DATA_R, 15 \| IEM_MEMMAP_F_ALIGN_GP \| IEM_MEMMAP_F_ALIGN_SSE);
6977	if (rc == VINF_SUCCESS)
6978	{
6979	pu64Dst = pu64Src;
6980	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu64Src, IEM_ACCESS_DATA_R);
6981	}
6982	return rc;
6983	}
6984
6985
6986	#ifdef IEM_WITH_SETJMP
6987	/**
6988	* Fetches a data qword, longjmp on error.
6989	*
6990	* @returns The qword.
6991	* @param pVCpu The cross context virtual CPU structure of the calling thread.
6992	* @param iSegReg The index of the segment register to use for
6993	* this access. The base and limits are checked.
6994	* @param GCPtrMem The address of the guest memory.
6995	*/
6996	uint64_t iemMemFetchDataU64AlignedU128Jmp(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
6997	{
6998	/* The lazy approach for now... */
6999	uint64_t const pu64Src = (uint64_t const )iemMemMapJmp(pVCpu, sizeof(*pu64Src), iSegReg, GCPtrMem, IEM_ACCESS_DATA_R,
7000	15 \| IEM_MEMMAP_F_ALIGN_GP \| IEM_MEMMAP_F_ALIGN_SSE);
7001	uint64_t const u64Ret = *pu64Src;
7002	iemMemCommitAndUnmapJmp(pVCpu, (void *)pu64Src, IEM_ACCESS_DATA_R);
7003	return u64Ret;
7004	}
7005	#endif
7006
7007
7008	/**
7009	* Fetches a data tword.
7010	*
7011	* @returns Strict VBox status code.
7012	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7013	* @param pr80Dst Where to return the tword.
7014	* @param iSegReg The index of the segment register to use for
7015	* this access. The base and limits are checked.
7016	* @param GCPtrMem The address of the guest memory.
7017	*/
7018	VBOXSTRICTRC iemMemFetchDataR80(PVMCPUCC pVCpu, PRTFLOAT80U pr80Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
7019	{
7020	/* The lazy approach for now... */
7021	PCRTFLOAT80U pr80Src;
7022	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pr80Src, sizeof(pr80Src), iSegReg, GCPtrMem, IEM_ACCESS_DATA_R, 7);
7023	if (rc == VINF_SUCCESS)
7024	{
7025	pr80Dst = pr80Src;
7026	rc = iemMemCommitAndUnmap(pVCpu, (void *)pr80Src, IEM_ACCESS_DATA_R);
7027	}
7028	return rc;
7029	}
7030
7031
7032	#ifdef IEM_WITH_SETJMP
7033	/**
7034	* Fetches a data tword, longjmp on error.
7035	*
7036	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7037	* @param pr80Dst Where to return the tword.
7038	* @param iSegReg The index of the segment register to use for
7039	* this access. The base and limits are checked.
7040	* @param GCPtrMem The address of the guest memory.
7041	*/
7042	void iemMemFetchDataR80Jmp(PVMCPUCC pVCpu, PRTFLOAT80U pr80Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
7043	{
7044	/* The lazy approach for now... */
7045	PCRTFLOAT80U pr80Src = (PCRTFLOAT80U)iemMemMapJmp(pVCpu, sizeof(*pr80Src), iSegReg, GCPtrMem, IEM_ACCESS_DATA_R, 7);
7046	pr80Dst = pr80Src;
7047	iemMemCommitAndUnmapJmp(pVCpu, (void *)pr80Src, IEM_ACCESS_DATA_R);
7048	}
7049	#endif
7050
7051
7052	/**
7053	* Fetches a data decimal tword.
7054	*
7055	* @returns Strict VBox status code.
7056	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7057	* @param pd80Dst Where to return the tword.
7058	* @param iSegReg The index of the segment register to use for
7059	* this access. The base and limits are checked.
7060	* @param GCPtrMem The address of the guest memory.
7061	*/
7062	VBOXSTRICTRC iemMemFetchDataD80(PVMCPUCC pVCpu, PRTPBCD80U pd80Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
7063	{
7064	/* The lazy approach for now... */
7065	PCRTPBCD80U pd80Src;
7066	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pd80Src, sizeof(pd80Src), iSegReg, GCPtrMem,
7067	IEM_ACCESS_DATA_R, 7 /** @todo FBLD alignment check */);
7068	if (rc == VINF_SUCCESS)
7069	{
7070	pd80Dst = pd80Src;
7071	rc = iemMemCommitAndUnmap(pVCpu, (void *)pd80Src, IEM_ACCESS_DATA_R);
7072	}
7073	return rc;
7074	}
7075
7076
7077	#ifdef IEM_WITH_SETJMP
7078	/**
7079	* Fetches a data decimal tword, longjmp on error.
7080	*
7081	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7082	* @param pd80Dst Where to return the tword.
7083	* @param iSegReg The index of the segment register to use for
7084	* this access. The base and limits are checked.
7085	* @param GCPtrMem The address of the guest memory.
7086	*/
7087	void iemMemFetchDataD80Jmp(PVMCPUCC pVCpu, PRTPBCD80U pd80Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
7088	{
7089	/* The lazy approach for now... */
7090	PCRTPBCD80U pd80Src = (PCRTPBCD80U)iemMemMapJmp(pVCpu, sizeof(*pd80Src), iSegReg, GCPtrMem,
7091	IEM_ACCESS_DATA_R, 7 /** @todo FBSTP alignment check */);
7092	pd80Dst = pd80Src;
7093	iemMemCommitAndUnmapJmp(pVCpu, (void *)pd80Src, IEM_ACCESS_DATA_R);
7094	}
7095	#endif
7096
7097
7098	/**
7099	* Fetches a data dqword (double qword), generally SSE related.
7100	*
7101	* @returns Strict VBox status code.
7102	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7103	* @param pu128Dst Where to return the qword.
7104	* @param iSegReg The index of the segment register to use for
7105	* this access. The base and limits are checked.
7106	* @param GCPtrMem The address of the guest memory.
7107	*/
7108	VBOXSTRICTRC iemMemFetchDataU128(PVMCPUCC pVCpu, PRTUINT128U pu128Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
7109	{
7110	/* The lazy approach for now... */
7111	PCRTUINT128U pu128Src;
7112	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu128Src, sizeof(pu128Src), iSegReg, GCPtrMem,
7113	IEM_ACCESS_DATA_R, 0 /* NO_AC variant */);
7114	if (rc == VINF_SUCCESS)
7115	{
7116	pu128Dst->au64[0] = pu128Src->au64[0];
7117	pu128Dst->au64[1] = pu128Src->au64[1];
7118	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu128Src, IEM_ACCESS_DATA_R);
7119	}
7120	return rc;
7121	}
7122
7123
7124	#ifdef IEM_WITH_SETJMP
7125	/**
7126	* Fetches a data dqword (double qword), generally SSE related.
7127	*
7128	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7129	* @param pu128Dst Where to return the qword.
7130	* @param iSegReg The index of the segment register to use for
7131	* this access. The base and limits are checked.
7132	* @param GCPtrMem The address of the guest memory.
7133	*/
7134	void iemMemFetchDataU128Jmp(PVMCPUCC pVCpu, PRTUINT128U pu128Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
7135	{
7136	/* The lazy approach for now... */
7137	PCRTUINT128U pu128Src = (PCRTUINT128U)iemMemMapJmp(pVCpu, sizeof(*pu128Src), iSegReg, GCPtrMem,
7138	IEM_ACCESS_DATA_R, 0 /* NO_AC variant */);
7139	pu128Dst->au64[0] = pu128Src->au64[0];
7140	pu128Dst->au64[1] = pu128Src->au64[1];
7141	iemMemCommitAndUnmapJmp(pVCpu, (void *)pu128Src, IEM_ACCESS_DATA_R);
7142	}
7143	#endif
7144
7145
7146	/**
7147	* Fetches a data dqword (double qword) at an aligned address, generally SSE
7148	* related.
7149	*
7150	* Raises \#GP(0) if not aligned.
7151	*
7152	* @returns Strict VBox status code.
7153	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7154	* @param pu128Dst Where to return the qword.
7155	* @param iSegReg The index of the segment register to use for
7156	* this access. The base and limits are checked.
7157	* @param GCPtrMem The address of the guest memory.
7158	*/
7159	VBOXSTRICTRC iemMemFetchDataU128AlignedSse(PVMCPUCC pVCpu, PRTUINT128U pu128Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
7160	{
7161	/* The lazy approach for now... */
7162	PCRTUINT128U pu128Src;
7163	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu128Src, sizeof(pu128Src), iSegReg, GCPtrMem,
7164	IEM_ACCESS_DATA_R, (sizeof(*pu128Src) - 1) \| IEM_MEMMAP_F_ALIGN_GP \| IEM_MEMMAP_F_ALIGN_SSE);
7165	if (rc == VINF_SUCCESS)
7166	{
7167	pu128Dst->au64[0] = pu128Src->au64[0];
7168	pu128Dst->au64[1] = pu128Src->au64[1];
7169	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu128Src, IEM_ACCESS_DATA_R);
7170	}
7171	return rc;
7172	}
7173
7174
7175	#ifdef IEM_WITH_SETJMP
7176	/**
7177	* Fetches a data dqword (double qword) at an aligned address, generally SSE
7178	* related, longjmp on error.
7179	*
7180	* Raises \#GP(0) if not aligned.
7181	*
7182	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7183	* @param pu128Dst Where to return the qword.
7184	* @param iSegReg The index of the segment register to use for
7185	* this access. The base and limits are checked.
7186	* @param GCPtrMem The address of the guest memory.
7187	*/
7188	void iemMemFetchDataU128AlignedSseJmp(PVMCPUCC pVCpu, PRTUINT128U pu128Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
7189	{
7190	/* The lazy approach for now... */
7191	PCRTUINT128U pu128Src = (PCRTUINT128U)iemMemMapJmp(pVCpu, sizeof(*pu128Src), iSegReg, GCPtrMem, IEM_ACCESS_DATA_R,
7192	(sizeof(*pu128Src) - 1) \| IEM_MEMMAP_F_ALIGN_GP \| IEM_MEMMAP_F_ALIGN_SSE);
7193	pu128Dst->au64[0] = pu128Src->au64[0];
7194	pu128Dst->au64[1] = pu128Src->au64[1];
7195	iemMemCommitAndUnmapJmp(pVCpu, (void *)pu128Src, IEM_ACCESS_DATA_R);
7196	}
7197	#endif
7198
7199
7200	/**
7201	* Fetches a data oword (octo word), generally AVX related.
7202	*
7203	* @returns Strict VBox status code.
7204	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7205	* @param pu256Dst Where to return the qword.
7206	* @param iSegReg The index of the segment register to use for
7207	* this access. The base and limits are checked.
7208	* @param GCPtrMem The address of the guest memory.
7209	*/
7210	VBOXSTRICTRC iemMemFetchDataU256(PVMCPUCC pVCpu, PRTUINT256U pu256Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
7211	{
7212	/* The lazy approach for now... */
7213	PCRTUINT256U pu256Src;
7214	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu256Src, sizeof(pu256Src), iSegReg, GCPtrMem,
7215	IEM_ACCESS_DATA_R, 0 /* NO_AC variant */);
7216	if (rc == VINF_SUCCESS)
7217	{
7218	pu256Dst->au64[0] = pu256Src->au64[0];
7219	pu256Dst->au64[1] = pu256Src->au64[1];
7220	pu256Dst->au64[2] = pu256Src->au64[2];
7221	pu256Dst->au64[3] = pu256Src->au64[3];
7222	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu256Src, IEM_ACCESS_DATA_R);
7223	}
7224	return rc;
7225	}
7226
7227
7228	#ifdef IEM_WITH_SETJMP
7229	/**
7230	* Fetches a data oword (octo word), generally AVX related.
7231	*
7232	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7233	* @param pu256Dst Where to return the qword.
7234	* @param iSegReg The index of the segment register to use for
7235	* this access. The base and limits are checked.
7236	* @param GCPtrMem The address of the guest memory.
7237	*/
7238	void iemMemFetchDataU256Jmp(PVMCPUCC pVCpu, PRTUINT256U pu256Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
7239	{
7240	/* The lazy approach for now... */
7241	PCRTUINT256U pu256Src = (PCRTUINT256U)iemMemMapJmp(pVCpu, sizeof(*pu256Src), iSegReg, GCPtrMem,
7242	IEM_ACCESS_DATA_R, 0 /* NO_AC variant */);
7243	pu256Dst->au64[0] = pu256Src->au64[0];
7244	pu256Dst->au64[1] = pu256Src->au64[1];
7245	pu256Dst->au64[2] = pu256Src->au64[2];
7246	pu256Dst->au64[3] = pu256Src->au64[3];
7247	iemMemCommitAndUnmapJmp(pVCpu, (void *)pu256Src, IEM_ACCESS_DATA_R);
7248	}
7249	#endif
7250
7251
7252	/**
7253	* Fetches a data oword (octo word) at an aligned address, generally AVX
7254	* related.
7255	*
7256	* Raises \#GP(0) if not aligned.
7257	*
7258	* @returns Strict VBox status code.
7259	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7260	* @param pu256Dst Where to return the qword.
7261	* @param iSegReg The index of the segment register to use for
7262	* this access. The base and limits are checked.
7263	* @param GCPtrMem The address of the guest memory.
7264	*/
7265	VBOXSTRICTRC iemMemFetchDataU256AlignedSse(PVMCPUCC pVCpu, PRTUINT256U pu256Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
7266	{
7267	/* The lazy approach for now... */
7268	PCRTUINT256U pu256Src;
7269	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu256Src, sizeof(pu256Src), iSegReg, GCPtrMem,
7270	IEM_ACCESS_DATA_R, (sizeof(*pu256Src) - 1) \| IEM_MEMMAP_F_ALIGN_GP \| IEM_MEMMAP_F_ALIGN_SSE);
7271	if (rc == VINF_SUCCESS)
7272	{
7273	pu256Dst->au64[0] = pu256Src->au64[0];
7274	pu256Dst->au64[1] = pu256Src->au64[1];
7275	pu256Dst->au64[2] = pu256Src->au64[2];
7276	pu256Dst->au64[3] = pu256Src->au64[3];
7277	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu256Src, IEM_ACCESS_DATA_R);
7278	}
7279	return rc;
7280	}
7281
7282
7283	#ifdef IEM_WITH_SETJMP
7284	/**
7285	* Fetches a data oword (octo word) at an aligned address, generally AVX
7286	* related, longjmp on error.
7287	*
7288	* Raises \#GP(0) if not aligned.
7289	*
7290	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7291	* @param pu256Dst Where to return the qword.
7292	* @param iSegReg The index of the segment register to use for
7293	* this access. The base and limits are checked.
7294	* @param GCPtrMem The address of the guest memory.
7295	*/
7296	void iemMemFetchDataU256AlignedSseJmp(PVMCPUCC pVCpu, PRTUINT256U pu256Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
7297	{
7298	/* The lazy approach for now... */
7299	PCRTUINT256U pu256Src = (PCRTUINT256U)iemMemMapJmp(pVCpu, sizeof(*pu256Src), iSegReg, GCPtrMem, IEM_ACCESS_DATA_R,
7300	(sizeof(*pu256Src) - 1) \| IEM_MEMMAP_F_ALIGN_GP \| IEM_MEMMAP_F_ALIGN_SSE);
7301	pu256Dst->au64[0] = pu256Src->au64[0];
7302	pu256Dst->au64[1] = pu256Src->au64[1];
7303	pu256Dst->au64[2] = pu256Src->au64[2];
7304	pu256Dst->au64[3] = pu256Src->au64[3];
7305	iemMemCommitAndUnmapJmp(pVCpu, (void *)pu256Src, IEM_ACCESS_DATA_R);
7306	}
7307	#endif
7308
7309
7310
7311	/**
7312	* Fetches a descriptor register (lgdt, lidt).
7313	*
7314	* @returns Strict VBox status code.
7315	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7316	* @param pcbLimit Where to return the limit.
7317	* @param pGCPtrBase Where to return the base.
7318	* @param iSegReg The index of the segment register to use for
7319	* this access. The base and limits are checked.
7320	* @param GCPtrMem The address of the guest memory.
7321	* @param enmOpSize The effective operand size.
7322	*/
7323	VBOXSTRICTRC iemMemFetchDataXdtr(PVMCPUCC pVCpu, uint16_t *pcbLimit, PRTGCPTR pGCPtrBase, uint8_t iSegReg,
7324	RTGCPTR GCPtrMem, IEMMODE enmOpSize) RT_NOEXCEPT
7325	{
7326	/*
7327	* Just like SIDT and SGDT, the LIDT and LGDT instructions are a
7328	* little special:
7329	* - The two reads are done separately.
7330	* - Operand size override works in 16-bit and 32-bit code, but 64-bit.
7331	* - We suspect the 386 to actually commit the limit before the base in
7332	* some cases (search for 386 in bs3CpuBasic2_lidt_lgdt_One). We
7333	* don't try emulate this eccentric behavior, because it's not well
7334	* enough understood and rather hard to trigger.
7335	* - The 486 seems to do a dword limit read when the operand size is 32-bit.
7336	*/
7337	VBOXSTRICTRC rcStrict;
7338	if (pVCpu->iem.s.enmCpuMode == IEMMODE_64BIT)
7339	{
7340	rcStrict = iemMemFetchDataU16(pVCpu, pcbLimit, iSegReg, GCPtrMem);
7341	if (rcStrict == VINF_SUCCESS)
7342	rcStrict = iemMemFetchDataU64(pVCpu, pGCPtrBase, iSegReg, GCPtrMem + 2);
7343	}
7344	else
7345	{
7346	uint32_t uTmp = 0; /* (Visual C++ maybe used uninitialized) */
7347	if (enmOpSize == IEMMODE_32BIT)
7348	{
7349	if (IEM_GET_TARGET_CPU(pVCpu) != IEMTARGETCPU_486)
7350	{
7351	rcStrict = iemMemFetchDataU16(pVCpu, pcbLimit, iSegReg, GCPtrMem);
7352	if (rcStrict == VINF_SUCCESS)
7353	rcStrict = iemMemFetchDataU32(pVCpu, &uTmp, iSegReg, GCPtrMem + 2);
7354	}
7355	else
7356	{
7357	rcStrict = iemMemFetchDataU32(pVCpu, &uTmp, iSegReg, GCPtrMem);
7358	if (rcStrict == VINF_SUCCESS)
7359	{
7360	*pcbLimit = (uint16_t)uTmp;
7361	rcStrict = iemMemFetchDataU32(pVCpu, &uTmp, iSegReg, GCPtrMem + 2);
7362	}
7363	}
7364	if (rcStrict == VINF_SUCCESS)
7365	*pGCPtrBase = uTmp;
7366	}
7367	else
7368	{
7369	rcStrict = iemMemFetchDataU16(pVCpu, pcbLimit, iSegReg, GCPtrMem);
7370	if (rcStrict == VINF_SUCCESS)
7371	{
7372	rcStrict = iemMemFetchDataU32(pVCpu, &uTmp, iSegReg, GCPtrMem + 2);
7373	if (rcStrict == VINF_SUCCESS)
7374	*pGCPtrBase = uTmp & UINT32_C(0x00ffffff);
7375	}
7376	}
7377	}
7378	return rcStrict;
7379	}
7380
7381
7382
7383	/**
7384	* Stores a data byte.
7385	*
7386	* @returns Strict VBox status code.
7387	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7388	* @param iSegReg The index of the segment register to use for
7389	* this access. The base and limits are checked.
7390	* @param GCPtrMem The address of the guest memory.
7391	* @param u8Value The value to store.
7392	*/
7393	VBOXSTRICTRC iemMemStoreDataU8(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem, uint8_t u8Value) RT_NOEXCEPT
7394	{
7395	/* The lazy approach for now... */
7396	uint8_t *pu8Dst;
7397	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu8Dst, sizeof(pu8Dst), iSegReg, GCPtrMem, IEM_ACCESS_DATA_W, 0);
7398	if (rc == VINF_SUCCESS)
7399	{
7400	*pu8Dst = u8Value;
7401	rc = iemMemCommitAndUnmap(pVCpu, pu8Dst, IEM_ACCESS_DATA_W);
7402	}
7403	return rc;
7404	}
7405
7406
7407	#ifdef IEM_WITH_SETJMP
7408	/**
7409	* Stores a data byte, longjmp on error.
7410	*
7411	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7412	* @param iSegReg The index of the segment register to use for
7413	* this access. The base and limits are checked.
7414	* @param GCPtrMem The address of the guest memory.
7415	* @param u8Value The value to store.
7416	*/
7417	void iemMemStoreDataU8Jmp(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem, uint8_t u8Value) RT_NOEXCEPT
7418	{
7419	/* The lazy approach for now... */
7420	uint8_t pu8Dst = (uint8_t )iemMemMapJmp(pVCpu, sizeof(*pu8Dst), iSegReg, GCPtrMem, IEM_ACCESS_DATA_W, 0);
7421	*pu8Dst = u8Value;
7422	iemMemCommitAndUnmapJmp(pVCpu, pu8Dst, IEM_ACCESS_DATA_W);
7423	}
7424	#endif
7425
7426
7427	/**
7428	* Stores a data word.
7429	*
7430	* @returns Strict VBox status code.
7431	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7432	* @param iSegReg The index of the segment register to use for
7433	* this access. The base and limits are checked.
7434	* @param GCPtrMem The address of the guest memory.
7435	* @param u16Value The value to store.
7436	*/
7437	VBOXSTRICTRC iemMemStoreDataU16(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem, uint16_t u16Value) RT_NOEXCEPT
7438	{
7439	/* The lazy approach for now... */
7440	uint16_t *pu16Dst;
7441	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu16Dst, sizeof(pu16Dst), iSegReg, GCPtrMem,
7442	IEM_ACCESS_DATA_W, sizeof(*pu16Dst) - 1);
7443	if (rc == VINF_SUCCESS)
7444	{
7445	*pu16Dst = u16Value;
7446	rc = iemMemCommitAndUnmap(pVCpu, pu16Dst, IEM_ACCESS_DATA_W);
7447	}
7448	return rc;
7449	}
7450
7451
7452	#ifdef IEM_WITH_SETJMP
7453	/**
7454	* Stores a data word, longjmp on error.
7455	*
7456	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7457	* @param iSegReg The index of the segment register to use for
7458	* this access. The base and limits are checked.
7459	* @param GCPtrMem The address of the guest memory.
7460	* @param u16Value The value to store.
7461	*/
7462	void iemMemStoreDataU16Jmp(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem, uint16_t u16Value) RT_NOEXCEPT
7463	{
7464	/* The lazy approach for now... */
7465	uint16_t pu16Dst = (uint16_t )iemMemMapJmp(pVCpu, sizeof(*pu16Dst), iSegReg, GCPtrMem,
7466	IEM_ACCESS_DATA_W, sizeof(*pu16Dst) - 1);
7467	*pu16Dst = u16Value;
7468	iemMemCommitAndUnmapJmp(pVCpu, pu16Dst, IEM_ACCESS_DATA_W);
7469	}
7470	#endif
7471
7472
7473	/**
7474	* Stores a data dword.
7475	*
7476	* @returns Strict VBox status code.
7477	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7478	* @param iSegReg The index of the segment register to use for
7479	* this access. The base and limits are checked.
7480	* @param GCPtrMem The address of the guest memory.
7481	* @param u32Value The value to store.
7482	*/
7483	VBOXSTRICTRC iemMemStoreDataU32(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem, uint32_t u32Value) RT_NOEXCEPT
7484	{
7485	/* The lazy approach for now... */
7486	uint32_t *pu32Dst;
7487	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu32Dst, sizeof(pu32Dst), iSegReg, GCPtrMem,
7488	IEM_ACCESS_DATA_W, sizeof(*pu32Dst) - 1);
7489	if (rc == VINF_SUCCESS)
7490	{
7491	*pu32Dst = u32Value;
7492	rc = iemMemCommitAndUnmap(pVCpu, pu32Dst, IEM_ACCESS_DATA_W);
7493	}
7494	return rc;
7495	}
7496
7497
7498	#ifdef IEM_WITH_SETJMP
7499	/**
7500	* Stores a data dword.
7501	*
7502	* @returns Strict VBox status code.
7503	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7504	* @param iSegReg The index of the segment register to use for
7505	* this access. The base and limits are checked.
7506	* @param GCPtrMem The address of the guest memory.
7507	* @param u32Value The value to store.
7508	*/
7509	void iemMemStoreDataU32Jmp(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem, uint32_t u32Value) RT_NOEXCEPT
7510	{
7511	/* The lazy approach for now... */
7512	uint32_t pu32Dst = (uint32_t )iemMemMapJmp(pVCpu, sizeof(*pu32Dst), iSegReg, GCPtrMem,
7513	IEM_ACCESS_DATA_W, sizeof(*pu32Dst) - 1);
7514	*pu32Dst = u32Value;
7515	iemMemCommitAndUnmapJmp(pVCpu, pu32Dst, IEM_ACCESS_DATA_W);
7516	}
7517	#endif
7518
7519
7520	/**
7521	* Stores a data qword.
7522	*
7523	* @returns Strict VBox status code.
7524	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7525	* @param iSegReg The index of the segment register to use for
7526	* this access. The base and limits are checked.
7527	* @param GCPtrMem The address of the guest memory.
7528	* @param u64Value The value to store.
7529	*/
7530	VBOXSTRICTRC iemMemStoreDataU64(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem, uint64_t u64Value) RT_NOEXCEPT
7531	{
7532	/* The lazy approach for now... */
7533	uint64_t *pu64Dst;
7534	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu64Dst, sizeof(pu64Dst), iSegReg, GCPtrMem,
7535	IEM_ACCESS_DATA_W, sizeof(*pu64Dst) - 1);
7536	if (rc == VINF_SUCCESS)
7537	{
7538	*pu64Dst = u64Value;
7539	rc = iemMemCommitAndUnmap(pVCpu, pu64Dst, IEM_ACCESS_DATA_W);
7540	}
7541	return rc;
7542	}
7543
7544
7545	#ifdef IEM_WITH_SETJMP
7546	/**
7547	* Stores a data qword, longjmp on error.
7548	*
7549	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7550	* @param iSegReg The index of the segment register to use for
7551	* this access. The base and limits are checked.
7552	* @param GCPtrMem The address of the guest memory.
7553	* @param u64Value The value to store.
7554	*/
7555	void iemMemStoreDataU64Jmp(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem, uint64_t u64Value) RT_NOEXCEPT
7556	{
7557	/* The lazy approach for now... */
7558	uint64_t pu64Dst = (uint64_t )iemMemMapJmp(pVCpu, sizeof(*pu64Dst), iSegReg, GCPtrMem,
7559	IEM_ACCESS_DATA_W, sizeof(*pu64Dst) - 1);
7560	*pu64Dst = u64Value;
7561	iemMemCommitAndUnmapJmp(pVCpu, pu64Dst, IEM_ACCESS_DATA_W);
7562	}
7563	#endif
7564
7565
7566	/**
7567	* Stores a data dqword.
7568	*
7569	* @returns Strict VBox status code.
7570	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7571	* @param iSegReg The index of the segment register to use for
7572	* this access. The base and limits are checked.
7573	* @param GCPtrMem The address of the guest memory.
7574	* @param u128Value The value to store.
7575	*/
7576	VBOXSTRICTRC iemMemStoreDataU128(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem, RTUINT128U u128Value) RT_NOEXCEPT
7577	{
7578	/* The lazy approach for now... */
7579	PRTUINT128U pu128Dst;
7580	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu128Dst, sizeof(pu128Dst), iSegReg, GCPtrMem,
7581	IEM_ACCESS_DATA_W, 0 /* NO_AC variant */);
7582	if (rc == VINF_SUCCESS)
7583	{
7584	pu128Dst->au64[0] = u128Value.au64[0];
7585	pu128Dst->au64[1] = u128Value.au64[1];
7586	rc = iemMemCommitAndUnmap(pVCpu, pu128Dst, IEM_ACCESS_DATA_W);
7587	}
7588	return rc;
7589	}
7590
7591
7592	#ifdef IEM_WITH_SETJMP
7593	/**
7594	* Stores a data dqword, longjmp on error.
7595	*
7596	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7597	* @param iSegReg The index of the segment register to use for
7598	* this access. The base and limits are checked.
7599	* @param GCPtrMem The address of the guest memory.
7600	* @param u128Value The value to store.
7601	*/
7602	void iemMemStoreDataU128Jmp(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem, RTUINT128U u128Value) RT_NOEXCEPT
7603	{
7604	/* The lazy approach for now... */
7605	PRTUINT128U pu128Dst = (PRTUINT128U)iemMemMapJmp(pVCpu, sizeof(*pu128Dst), iSegReg, GCPtrMem,
7606	IEM_ACCESS_DATA_W, 0 /* NO_AC variant */);
7607	pu128Dst->au64[0] = u128Value.au64[0];
7608	pu128Dst->au64[1] = u128Value.au64[1];
7609	iemMemCommitAndUnmapJmp(pVCpu, pu128Dst, IEM_ACCESS_DATA_W);
7610	}
7611	#endif
7612
7613
7614	/**
7615	* Stores a data dqword, SSE aligned.
7616	*
7617	* @returns Strict VBox status code.
7618	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7619	* @param iSegReg The index of the segment register to use for
7620	* this access. The base and limits are checked.
7621	* @param GCPtrMem The address of the guest memory.
7622	* @param u128Value The value to store.
7623	*/
7624	VBOXSTRICTRC iemMemStoreDataU128AlignedSse(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem, RTUINT128U u128Value) RT_NOEXCEPT
7625	{
7626	/* The lazy approach for now... */
7627	PRTUINT128U pu128Dst;
7628	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu128Dst, sizeof(pu128Dst), iSegReg, GCPtrMem, IEM_ACCESS_DATA_W,
7629	(sizeof(*pu128Dst) - 1) \| IEM_MEMMAP_F_ALIGN_GP \| IEM_MEMMAP_F_ALIGN_SSE);
7630	if (rc == VINF_SUCCESS)
7631	{
7632	pu128Dst->au64[0] = u128Value.au64[0];
7633	pu128Dst->au64[1] = u128Value.au64[1];
7634	rc = iemMemCommitAndUnmap(pVCpu, pu128Dst, IEM_ACCESS_DATA_W);
7635	}
7636	return rc;
7637	}
7638
7639
7640	#ifdef IEM_WITH_SETJMP
7641	/**
7642	* Stores a data dqword, SSE aligned.
7643	*
7644	* @returns Strict VBox status code.
7645	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7646	* @param iSegReg The index of the segment register to use for
7647	* this access. The base and limits are checked.
7648	* @param GCPtrMem The address of the guest memory.
7649	* @param u128Value The value to store.
7650	*/
7651	void iemMemStoreDataU128AlignedSseJmp(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem, RTUINT128U u128Value) RT_NOEXCEPT
7652	{
7653	/* The lazy approach for now... */
7654	PRTUINT128U pu128Dst = (PRTUINT128U)iemMemMapJmp(pVCpu, sizeof(*pu128Dst), iSegReg, GCPtrMem, IEM_ACCESS_DATA_W,
7655	(sizeof(*pu128Dst) - 1) \| IEM_MEMMAP_F_ALIGN_GP \| IEM_MEMMAP_F_ALIGN_SSE);
7656	pu128Dst->au64[0] = u128Value.au64[0];
7657	pu128Dst->au64[1] = u128Value.au64[1];
7658	iemMemCommitAndUnmapJmp(pVCpu, pu128Dst, IEM_ACCESS_DATA_W);
7659	}
7660	#endif
7661
7662
7663	/**
7664	* Stores a data dqword.
7665	*
7666	* @returns Strict VBox status code.
7667	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7668	* @param iSegReg The index of the segment register to use for
7669	* this access. The base and limits are checked.
7670	* @param GCPtrMem The address of the guest memory.
7671	* @param pu256Value Pointer to the value to store.
7672	*/
7673	VBOXSTRICTRC iemMemStoreDataU256(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem, PCRTUINT256U pu256Value) RT_NOEXCEPT
7674	{
7675	/* The lazy approach for now... */
7676	PRTUINT256U pu256Dst;
7677	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu256Dst, sizeof(pu256Dst), iSegReg, GCPtrMem,
7678	IEM_ACCESS_DATA_W, 0 /* NO_AC variant */);
7679	if (rc == VINF_SUCCESS)
7680	{
7681	pu256Dst->au64[0] = pu256Value->au64[0];
7682	pu256Dst->au64[1] = pu256Value->au64[1];
7683	pu256Dst->au64[2] = pu256Value->au64[2];
7684	pu256Dst->au64[3] = pu256Value->au64[3];
7685	rc = iemMemCommitAndUnmap(pVCpu, pu256Dst, IEM_ACCESS_DATA_W);
7686	}
7687	return rc;
7688	}
7689
7690
7691	#ifdef IEM_WITH_SETJMP
7692	/**
7693	* Stores a data dqword, longjmp on error.
7694	*
7695	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7696	* @param iSegReg The index of the segment register to use for
7697	* this access. The base and limits are checked.
7698	* @param GCPtrMem The address of the guest memory.
7699	* @param pu256Value Pointer to the value to store.
7700	*/
7701	void iemMemStoreDataU256Jmp(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem, PCRTUINT256U pu256Value) RT_NOEXCEPT
7702	{
7703	/* The lazy approach for now... */
7704	PRTUINT256U pu256Dst = (PRTUINT256U)iemMemMapJmp(pVCpu, sizeof(*pu256Dst), iSegReg, GCPtrMem,
7705	IEM_ACCESS_DATA_W, 0 /* NO_AC variant */);
7706	pu256Dst->au64[0] = pu256Value->au64[0];
7707	pu256Dst->au64[1] = pu256Value->au64[1];
7708	pu256Dst->au64[2] = pu256Value->au64[2];
7709	pu256Dst->au64[3] = pu256Value->au64[3];
7710	iemMemCommitAndUnmapJmp(pVCpu, pu256Dst, IEM_ACCESS_DATA_W);
7711	}
7712	#endif
7713
7714
7715	/**
7716	* Stores a data dqword, AVX \#GP(0) aligned.
7717	*
7718	* @returns Strict VBox status code.
7719	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7720	* @param iSegReg The index of the segment register to use for
7721	* this access. The base and limits are checked.
7722	* @param GCPtrMem The address of the guest memory.
7723	* @param pu256Value Pointer to the value to store.
7724	*/
7725	VBOXSTRICTRC iemMemStoreDataU256AlignedAvx(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem, PCRTUINT256U pu256Value) RT_NOEXCEPT
7726	{
7727	/* The lazy approach for now... */
7728	PRTUINT256U pu256Dst;
7729	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu256Dst, sizeof(pu256Dst), iSegReg, GCPtrMem,
7730	IEM_ACCESS_DATA_W, (sizeof(*pu256Dst) - 1) \| IEM_MEMMAP_F_ALIGN_GP);
7731	if (rc == VINF_SUCCESS)
7732	{
7733	pu256Dst->au64[0] = pu256Value->au64[0];
7734	pu256Dst->au64[1] = pu256Value->au64[1];
7735	pu256Dst->au64[2] = pu256Value->au64[2];
7736	pu256Dst->au64[3] = pu256Value->au64[3];
7737	rc = iemMemCommitAndUnmap(pVCpu, pu256Dst, IEM_ACCESS_DATA_W);
7738	}
7739	return rc;
7740	}
7741
7742
7743	#ifdef IEM_WITH_SETJMP
7744	/**
7745	* Stores a data dqword, AVX aligned.
7746	*
7747	* @returns Strict VBox status code.
7748	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7749	* @param iSegReg The index of the segment register to use for
7750	* this access. The base and limits are checked.
7751	* @param GCPtrMem The address of the guest memory.
7752	* @param pu256Value Pointer to the value to store.
7753	*/
7754	void iemMemStoreDataU256AlignedAvxJmp(PVMCPUCC pVCpu, uint8_t iSegReg, RTGCPTR GCPtrMem, PCRTUINT256U pu256Value) RT_NOEXCEPT
7755	{
7756	/* The lazy approach for now... */
7757	PRTUINT256U pu256Dst = (PRTUINT256U)iemMemMapJmp(pVCpu, sizeof(*pu256Dst), iSegReg, GCPtrMem,
7758	IEM_ACCESS_DATA_W, (sizeof(*pu256Dst) - 1) \| IEM_MEMMAP_F_ALIGN_GP);
7759	pu256Dst->au64[0] = pu256Value->au64[0];
7760	pu256Dst->au64[1] = pu256Value->au64[1];
7761	pu256Dst->au64[2] = pu256Value->au64[2];
7762	pu256Dst->au64[3] = pu256Value->au64[3];
7763	iemMemCommitAndUnmapJmp(pVCpu, pu256Dst, IEM_ACCESS_DATA_W);
7764	}
7765	#endif
7766
7767
7768	/**
7769	* Stores a descriptor register (sgdt, sidt).
7770	*
7771	* @returns Strict VBox status code.
7772	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7773	* @param cbLimit The limit.
7774	* @param GCPtrBase The base address.
7775	* @param iSegReg The index of the segment register to use for
7776	* this access. The base and limits are checked.
7777	* @param GCPtrMem The address of the guest memory.
7778	*/
7779	VBOXSTRICTRC iemMemStoreDataXdtr(PVMCPUCC pVCpu, uint16_t cbLimit, RTGCPTR GCPtrBase, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
7780	{
7781	/*
7782	* The SIDT and SGDT instructions actually stores the data using two
7783	* independent writes (see bs3CpuBasic2_sidt_sgdt_One). The instructions
7784	* does not respond to opsize prefixes.
7785	*/
7786	VBOXSTRICTRC rcStrict = iemMemStoreDataU16(pVCpu, iSegReg, GCPtrMem, cbLimit);
7787	if (rcStrict == VINF_SUCCESS)
7788	{
7789	if (pVCpu->iem.s.enmCpuMode == IEMMODE_16BIT)
7790	rcStrict = iemMemStoreDataU32(pVCpu, iSegReg, GCPtrMem + 2,
7791	IEM_GET_TARGET_CPU(pVCpu) <= IEMTARGETCPU_286
7792	? (uint32_t)GCPtrBase \| UINT32_C(0xff000000) : (uint32_t)GCPtrBase);
7793	else if (pVCpu->iem.s.enmCpuMode == IEMMODE_32BIT)
7794	rcStrict = iemMemStoreDataU32(pVCpu, iSegReg, GCPtrMem + 2, (uint32_t)GCPtrBase);
7795	else
7796	rcStrict = iemMemStoreDataU64(pVCpu, iSegReg, GCPtrMem + 2, GCPtrBase);
7797	}
7798	return rcStrict;
7799	}
7800
7801
7802	/**
7803	* Pushes a word onto the stack.
7804	*
7805	* @returns Strict VBox status code.
7806	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7807	* @param u16Value The value to push.
7808	*/
7809	VBOXSTRICTRC iemMemStackPushU16(PVMCPUCC pVCpu, uint16_t u16Value) RT_NOEXCEPT
7810	{
7811	/* Increment the stack pointer. */
7812	uint64_t uNewRsp;
7813	RTGCPTR GCPtrTop = iemRegGetRspForPush(pVCpu, 2, &uNewRsp);
7814
7815	/* Write the word the lazy way. */
7816	uint16_t *pu16Dst;
7817	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu16Dst, sizeof(pu16Dst), X86_SREG_SS, GCPtrTop,
7818	IEM_ACCESS_STACK_W, sizeof(*pu16Dst) - 1);
7819	if (rc == VINF_SUCCESS)
7820	{
7821	*pu16Dst = u16Value;
7822	rc = iemMemCommitAndUnmap(pVCpu, pu16Dst, IEM_ACCESS_STACK_W);
7823	}
7824
7825	/* Commit the new RSP value unless we an access handler made trouble. */
7826	if (rc == VINF_SUCCESS)
7827	pVCpu->cpum.GstCtx.rsp = uNewRsp;
7828
7829	return rc;
7830	}
7831
7832
7833	/**
7834	* Pushes a dword onto the stack.
7835	*
7836	* @returns Strict VBox status code.
7837	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7838	* @param u32Value The value to push.
7839	*/
7840	VBOXSTRICTRC iemMemStackPushU32(PVMCPUCC pVCpu, uint32_t u32Value) RT_NOEXCEPT
7841	{
7842	/* Increment the stack pointer. */
7843	uint64_t uNewRsp;
7844	RTGCPTR GCPtrTop = iemRegGetRspForPush(pVCpu, 4, &uNewRsp);
7845
7846	/* Write the dword the lazy way. */
7847	uint32_t *pu32Dst;
7848	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu32Dst, sizeof(pu32Dst), X86_SREG_SS, GCPtrTop,
7849	IEM_ACCESS_STACK_W, sizeof(*pu32Dst) - 1);
7850	if (rc == VINF_SUCCESS)
7851	{
7852	*pu32Dst = u32Value;
7853	rc = iemMemCommitAndUnmap(pVCpu, pu32Dst, IEM_ACCESS_STACK_W);
7854	}
7855
7856	/* Commit the new RSP value unless we an access handler made trouble. */
7857	if (rc == VINF_SUCCESS)
7858	pVCpu->cpum.GstCtx.rsp = uNewRsp;
7859
7860	return rc;
7861	}
7862
7863
7864	/**
7865	* Pushes a dword segment register value onto the stack.
7866	*
7867	* @returns Strict VBox status code.
7868	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7869	* @param u32Value The value to push.
7870	*/
7871	VBOXSTRICTRC iemMemStackPushU32SReg(PVMCPUCC pVCpu, uint32_t u32Value) RT_NOEXCEPT
7872	{
7873	/* Increment the stack pointer. */
7874	uint64_t uNewRsp;
7875	RTGCPTR GCPtrTop = iemRegGetRspForPush(pVCpu, 4, &uNewRsp);
7876
7877	/* The intel docs talks about zero extending the selector register
7878	value. My actual intel CPU here might be zero extending the value
7879	but it still only writes the lower word... */
7880	/** @todo Test this on new HW and on AMD and in 64-bit mode. Also test what
7881	* happens when crossing an electric page boundrary, is the high word checked
7882	* for write accessibility or not? Probably it is. What about segment limits?
7883	* It appears this behavior is also shared with trap error codes.
7884	*
7885	* Docs indicate the behavior changed maybe in Pentium or Pentium Pro. Check
7886	* ancient hardware when it actually did change. */
7887	uint16_t *pu16Dst;
7888	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void **)&pu16Dst, sizeof(uint32_t), X86_SREG_SS, GCPtrTop,
7889	IEM_ACCESS_STACK_RW, sizeof(pu16Dst) - 1); /* @todo 2 or 4 alignment check for PUSH SS? */
7890	if (rc == VINF_SUCCESS)
7891	{
7892	*pu16Dst = (uint16_t)u32Value;
7893	rc = iemMemCommitAndUnmap(pVCpu, pu16Dst, IEM_ACCESS_STACK_RW);
7894	}
7895
7896	/* Commit the new RSP value unless we an access handler made trouble. */
7897	if (rc == VINF_SUCCESS)
7898	pVCpu->cpum.GstCtx.rsp = uNewRsp;
7899
7900	return rc;
7901	}
7902
7903
7904	/**
7905	* Pushes a qword onto the stack.
7906	*
7907	* @returns Strict VBox status code.
7908	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7909	* @param u64Value The value to push.
7910	*/
7911	VBOXSTRICTRC iemMemStackPushU64(PVMCPUCC pVCpu, uint64_t u64Value) RT_NOEXCEPT
7912	{
7913	/* Increment the stack pointer. */
7914	uint64_t uNewRsp;
7915	RTGCPTR GCPtrTop = iemRegGetRspForPush(pVCpu, 8, &uNewRsp);
7916
7917	/* Write the word the lazy way. */
7918	uint64_t *pu64Dst;
7919	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu64Dst, sizeof(pu64Dst), X86_SREG_SS, GCPtrTop,
7920	IEM_ACCESS_STACK_W, sizeof(*pu64Dst) - 1);
7921	if (rc == VINF_SUCCESS)
7922	{
7923	*pu64Dst = u64Value;
7924	rc = iemMemCommitAndUnmap(pVCpu, pu64Dst, IEM_ACCESS_STACK_W);
7925	}
7926
7927	/* Commit the new RSP value unless we an access handler made trouble. */
7928	if (rc == VINF_SUCCESS)
7929	pVCpu->cpum.GstCtx.rsp = uNewRsp;
7930
7931	return rc;
7932	}
7933
7934
7935	/**
7936	* Pops a word from the stack.
7937	*
7938	* @returns Strict VBox status code.
7939	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7940	* @param pu16Value Where to store the popped value.
7941	*/
7942	VBOXSTRICTRC iemMemStackPopU16(PVMCPUCC pVCpu, uint16_t *pu16Value) RT_NOEXCEPT
7943	{
7944	/* Increment the stack pointer. */
7945	uint64_t uNewRsp;
7946	RTGCPTR GCPtrTop = iemRegGetRspForPop(pVCpu, 2, &uNewRsp);
7947
7948	/* Write the word the lazy way. */
7949	uint16_t const *pu16Src;
7950	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu16Src, sizeof(pu16Src), X86_SREG_SS, GCPtrTop,
7951	IEM_ACCESS_STACK_R, sizeof(*pu16Src) - 1);
7952	if (rc == VINF_SUCCESS)
7953	{
7954	pu16Value = pu16Src;
7955	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu16Src, IEM_ACCESS_STACK_R);
7956
7957	/* Commit the new RSP value. */
7958	if (rc == VINF_SUCCESS)
7959	pVCpu->cpum.GstCtx.rsp = uNewRsp;
7960	}
7961
7962	return rc;
7963	}
7964
7965
7966	/**
7967	* Pops a dword from the stack.
7968	*
7969	* @returns Strict VBox status code.
7970	* @param pVCpu The cross context virtual CPU structure of the calling thread.
7971	* @param pu32Value Where to store the popped value.
7972	*/
7973	VBOXSTRICTRC iemMemStackPopU32(PVMCPUCC pVCpu, uint32_t *pu32Value) RT_NOEXCEPT
7974	{
7975	/* Increment the stack pointer. */
7976	uint64_t uNewRsp;
7977	RTGCPTR GCPtrTop = iemRegGetRspForPop(pVCpu, 4, &uNewRsp);
7978
7979	/* Write the word the lazy way. */
7980	uint32_t const *pu32Src;
7981	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu32Src, sizeof(pu32Src), X86_SREG_SS, GCPtrTop,
7982	IEM_ACCESS_STACK_R, sizeof(*pu32Src) - 1);
7983	if (rc == VINF_SUCCESS)
7984	{
7985	pu32Value = pu32Src;
7986	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu32Src, IEM_ACCESS_STACK_R);
7987
7988	/* Commit the new RSP value. */
7989	if (rc == VINF_SUCCESS)
7990	pVCpu->cpum.GstCtx.rsp = uNewRsp;
7991	}
7992
7993	return rc;
7994	}
7995
7996
7997	/**
7998	* Pops a qword from the stack.
7999	*
8000	* @returns Strict VBox status code.
8001	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8002	* @param pu64Value Where to store the popped value.
8003	*/
8004	VBOXSTRICTRC iemMemStackPopU64(PVMCPUCC pVCpu, uint64_t *pu64Value) RT_NOEXCEPT
8005	{
8006	/* Increment the stack pointer. */
8007	uint64_t uNewRsp;
8008	RTGCPTR GCPtrTop = iemRegGetRspForPop(pVCpu, 8, &uNewRsp);
8009
8010	/* Write the word the lazy way. */
8011	uint64_t const *pu64Src;
8012	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu64Src, sizeof(pu64Src), X86_SREG_SS, GCPtrTop,
8013	IEM_ACCESS_STACK_R, sizeof(*pu64Src) - 1);
8014	if (rc == VINF_SUCCESS)
8015	{
8016	pu64Value = pu64Src;
8017	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu64Src, IEM_ACCESS_STACK_R);
8018
8019	/* Commit the new RSP value. */
8020	if (rc == VINF_SUCCESS)
8021	pVCpu->cpum.GstCtx.rsp = uNewRsp;
8022	}
8023
8024	return rc;
8025	}
8026
8027
8028	/**
8029	* Pushes a word onto the stack, using a temporary stack pointer.
8030	*
8031	* @returns Strict VBox status code.
8032	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8033	* @param u16Value The value to push.
8034	* @param pTmpRsp Pointer to the temporary stack pointer.
8035	*/
8036	VBOXSTRICTRC iemMemStackPushU16Ex(PVMCPUCC pVCpu, uint16_t u16Value, PRTUINT64U pTmpRsp) RT_NOEXCEPT
8037	{
8038	/* Increment the stack pointer. */
8039	RTUINT64U NewRsp = *pTmpRsp;
8040	RTGCPTR GCPtrTop = iemRegGetRspForPushEx(pVCpu, &NewRsp, 2);
8041
8042	/* Write the word the lazy way. */
8043	uint16_t *pu16Dst;
8044	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu16Dst, sizeof(pu16Dst), X86_SREG_SS, GCPtrTop,
8045	IEM_ACCESS_STACK_W, sizeof(*pu16Dst) - 1);
8046	if (rc == VINF_SUCCESS)
8047	{
8048	*pu16Dst = u16Value;
8049	rc = iemMemCommitAndUnmap(pVCpu, pu16Dst, IEM_ACCESS_STACK_W);
8050	}
8051
8052	/* Commit the new RSP value unless we an access handler made trouble. */
8053	if (rc == VINF_SUCCESS)
8054	*pTmpRsp = NewRsp;
8055
8056	return rc;
8057	}
8058
8059
8060	/**
8061	* Pushes a dword onto the stack, using a temporary stack pointer.
8062	*
8063	* @returns Strict VBox status code.
8064	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8065	* @param u32Value The value to push.
8066	* @param pTmpRsp Pointer to the temporary stack pointer.
8067	*/
8068	VBOXSTRICTRC iemMemStackPushU32Ex(PVMCPUCC pVCpu, uint32_t u32Value, PRTUINT64U pTmpRsp) RT_NOEXCEPT
8069	{
8070	/* Increment the stack pointer. */
8071	RTUINT64U NewRsp = *pTmpRsp;
8072	RTGCPTR GCPtrTop = iemRegGetRspForPushEx(pVCpu, &NewRsp, 4);
8073
8074	/* Write the word the lazy way. */
8075	uint32_t *pu32Dst;
8076	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu32Dst, sizeof(pu32Dst), X86_SREG_SS, GCPtrTop,
8077	IEM_ACCESS_STACK_W, sizeof(*pu32Dst) - 1);
8078	if (rc == VINF_SUCCESS)
8079	{
8080	*pu32Dst = u32Value;
8081	rc = iemMemCommitAndUnmap(pVCpu, pu32Dst, IEM_ACCESS_STACK_W);
8082	}
8083
8084	/* Commit the new RSP value unless we an access handler made trouble. */
8085	if (rc == VINF_SUCCESS)
8086	*pTmpRsp = NewRsp;
8087
8088	return rc;
8089	}
8090
8091
8092	/**
8093	* Pushes a dword onto the stack, using a temporary stack pointer.
8094	*
8095	* @returns Strict VBox status code.
8096	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8097	* @param u64Value The value to push.
8098	* @param pTmpRsp Pointer to the temporary stack pointer.
8099	*/
8100	VBOXSTRICTRC iemMemStackPushU64Ex(PVMCPUCC pVCpu, uint64_t u64Value, PRTUINT64U pTmpRsp) RT_NOEXCEPT
8101	{
8102	/* Increment the stack pointer. */
8103	RTUINT64U NewRsp = *pTmpRsp;
8104	RTGCPTR GCPtrTop = iemRegGetRspForPushEx(pVCpu, &NewRsp, 8);
8105
8106	/* Write the word the lazy way. */
8107	uint64_t *pu64Dst;
8108	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu64Dst, sizeof(pu64Dst), X86_SREG_SS, GCPtrTop,
8109	IEM_ACCESS_STACK_W, sizeof(*pu64Dst) - 1);
8110	if (rc == VINF_SUCCESS)
8111	{
8112	*pu64Dst = u64Value;
8113	rc = iemMemCommitAndUnmap(pVCpu, pu64Dst, IEM_ACCESS_STACK_W);
8114	}
8115
8116	/* Commit the new RSP value unless we an access handler made trouble. */
8117	if (rc == VINF_SUCCESS)
8118	*pTmpRsp = NewRsp;
8119
8120	return rc;
8121	}
8122
8123
8124	/**
8125	* Pops a word from the stack, using a temporary stack pointer.
8126	*
8127	* @returns Strict VBox status code.
8128	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8129	* @param pu16Value Where to store the popped value.
8130	* @param pTmpRsp Pointer to the temporary stack pointer.
8131	*/
8132	VBOXSTRICTRC iemMemStackPopU16Ex(PVMCPUCC pVCpu, uint16_t *pu16Value, PRTUINT64U pTmpRsp) RT_NOEXCEPT
8133	{
8134	/* Increment the stack pointer. */
8135	RTUINT64U NewRsp = *pTmpRsp;
8136	RTGCPTR GCPtrTop = iemRegGetRspForPopEx(pVCpu, &NewRsp, 2);
8137
8138	/* Write the word the lazy way. */
8139	uint16_t const *pu16Src;
8140	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu16Src, sizeof(pu16Src), X86_SREG_SS, GCPtrTop,
8141	IEM_ACCESS_STACK_R, sizeof(*pu16Src) - 1);
8142	if (rc == VINF_SUCCESS)
8143	{
8144	pu16Value = pu16Src;
8145	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu16Src, IEM_ACCESS_STACK_R);
8146
8147	/* Commit the new RSP value. */
8148	if (rc == VINF_SUCCESS)
8149	*pTmpRsp = NewRsp;
8150	}
8151
8152	return rc;
8153	}
8154
8155
8156	/**
8157	* Pops a dword from the stack, using a temporary stack pointer.
8158	*
8159	* @returns Strict VBox status code.
8160	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8161	* @param pu32Value Where to store the popped value.
8162	* @param pTmpRsp Pointer to the temporary stack pointer.
8163	*/
8164	VBOXSTRICTRC iemMemStackPopU32Ex(PVMCPUCC pVCpu, uint32_t *pu32Value, PRTUINT64U pTmpRsp) RT_NOEXCEPT
8165	{
8166	/* Increment the stack pointer. */
8167	RTUINT64U NewRsp = *pTmpRsp;
8168	RTGCPTR GCPtrTop = iemRegGetRspForPopEx(pVCpu, &NewRsp, 4);
8169
8170	/* Write the word the lazy way. */
8171	uint32_t const *pu32Src;
8172	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu32Src, sizeof(pu32Src), X86_SREG_SS, GCPtrTop,
8173	IEM_ACCESS_STACK_R, sizeof(*pu32Src) - 1);
8174	if (rc == VINF_SUCCESS)
8175	{
8176	pu32Value = pu32Src;
8177	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu32Src, IEM_ACCESS_STACK_R);
8178
8179	/* Commit the new RSP value. */
8180	if (rc == VINF_SUCCESS)
8181	*pTmpRsp = NewRsp;
8182	}
8183
8184	return rc;
8185	}
8186
8187
8188	/**
8189	* Pops a qword from the stack, using a temporary stack pointer.
8190	*
8191	* @returns Strict VBox status code.
8192	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8193	* @param pu64Value Where to store the popped value.
8194	* @param pTmpRsp Pointer to the temporary stack pointer.
8195	*/
8196	VBOXSTRICTRC iemMemStackPopU64Ex(PVMCPUCC pVCpu, uint64_t *pu64Value, PRTUINT64U pTmpRsp) RT_NOEXCEPT
8197	{
8198	/* Increment the stack pointer. */
8199	RTUINT64U NewRsp = *pTmpRsp;
8200	RTGCPTR GCPtrTop = iemRegGetRspForPopEx(pVCpu, &NewRsp, 8);
8201
8202	/* Write the word the lazy way. */
8203	uint64_t const *pu64Src;
8204	VBOXSTRICTRC rcStrict = iemMemMap(pVCpu, (void *)&pu64Src, sizeof(pu64Src), X86_SREG_SS, GCPtrTop,
8205	IEM_ACCESS_STACK_R, sizeof(*pu64Src) - 1);
8206	if (rcStrict == VINF_SUCCESS)
8207	{
8208	pu64Value = pu64Src;
8209	rcStrict = iemMemCommitAndUnmap(pVCpu, (void *)pu64Src, IEM_ACCESS_STACK_R);
8210
8211	/* Commit the new RSP value. */
8212	if (rcStrict == VINF_SUCCESS)
8213	*pTmpRsp = NewRsp;
8214	}
8215
8216	return rcStrict;
8217	}
8218
8219
8220	/**
8221	* Begin a special stack push (used by interrupt, exceptions and such).
8222	*
8223	* This will raise \#SS or \#PF if appropriate.
8224	*
8225	* @returns Strict VBox status code.
8226	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8227	* @param cbMem The number of bytes to push onto the stack.
8228	* @param cbAlign The alignment mask (7, 3, 1).
8229	* @param ppvMem Where to return the pointer to the stack memory.
8230	* As with the other memory functions this could be
8231	* direct access or bounce buffered access, so
8232	* don't commit register until the commit call
8233	* succeeds.
8234	* @param puNewRsp Where to return the new RSP value. This must be
8235	* passed unchanged to
8236	* iemMemStackPushCommitSpecial().
8237	*/
8238	VBOXSTRICTRC iemMemStackPushBeginSpecial(PVMCPUCC pVCpu, size_t cbMem, uint32_t cbAlign,
8239	void *ppvMem, uint64_t puNewRsp) RT_NOEXCEPT
8240	{
8241	Assert(cbMem < UINT8_MAX);
8242	RTGCPTR GCPtrTop = iemRegGetRspForPush(pVCpu, (uint8_t)cbMem, puNewRsp);
8243	return iemMemMap(pVCpu, ppvMem, cbMem, X86_SREG_SS, GCPtrTop,
8244	IEM_ACCESS_STACK_W, cbAlign);
8245	}
8246
8247
8248	/**
8249	* Commits a special stack push (started by iemMemStackPushBeginSpecial).
8250	*
8251	* This will update the rSP.
8252	*
8253	* @returns Strict VBox status code.
8254	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8255	* @param pvMem The pointer returned by
8256	* iemMemStackPushBeginSpecial().
8257	* @param uNewRsp The new RSP value returned by
8258	* iemMemStackPushBeginSpecial().
8259	*/
8260	VBOXSTRICTRC iemMemStackPushCommitSpecial(PVMCPUCC pVCpu, void *pvMem, uint64_t uNewRsp) RT_NOEXCEPT
8261	{
8262	VBOXSTRICTRC rcStrict = iemMemCommitAndUnmap(pVCpu, pvMem, IEM_ACCESS_STACK_W);
8263	if (rcStrict == VINF_SUCCESS)
8264	pVCpu->cpum.GstCtx.rsp = uNewRsp;
8265	return rcStrict;
8266	}
8267
8268
8269	/**
8270	* Begin a special stack pop (used by iret, retf and such).
8271	*
8272	* This will raise \#SS or \#PF if appropriate.
8273	*
8274	* @returns Strict VBox status code.
8275	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8276	* @param cbMem The number of bytes to pop from the stack.
8277	* @param cbAlign The alignment mask (7, 3, 1).
8278	* @param ppvMem Where to return the pointer to the stack memory.
8279	* @param puNewRsp Where to return the new RSP value. This must be
8280	* assigned to CPUMCTX::rsp manually some time
8281	* after iemMemStackPopDoneSpecial() has been
8282	* called.
8283	*/
8284	VBOXSTRICTRC iemMemStackPopBeginSpecial(PVMCPUCC pVCpu, size_t cbMem, uint32_t cbAlign,
8285	void const *ppvMem, uint64_t puNewRsp) RT_NOEXCEPT
8286	{
8287	Assert(cbMem < UINT8_MAX);
8288	RTGCPTR GCPtrTop = iemRegGetRspForPop(pVCpu, (uint8_t)cbMem, puNewRsp);
8289	return iemMemMap(pVCpu, (void **)ppvMem, cbMem, X86_SREG_SS, GCPtrTop, IEM_ACCESS_STACK_R, cbAlign);
8290	}
8291
8292
8293	/**
8294	* Continue a special stack pop (used by iret and retf), for the purpose of
8295	* retrieving a new stack pointer.
8296	*
8297	* This will raise \#SS or \#PF if appropriate.
8298	*
8299	* @returns Strict VBox status code.
8300	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8301	* @param off Offset from the top of the stack. This is zero
8302	* except in the retf case.
8303	* @param cbMem The number of bytes to pop from the stack.
8304	* @param ppvMem Where to return the pointer to the stack memory.
8305	* @param uCurNewRsp The current uncommitted RSP value. (No need to
8306	* return this because all use of this function is
8307	* to retrieve a new value and anything we return
8308	* here would be discarded.)
8309	*/
8310	VBOXSTRICTRC iemMemStackPopContinueSpecial(PVMCPUCC pVCpu, size_t off, size_t cbMem,
8311	void const **ppvMem, uint64_t uCurNewRsp) RT_NOEXCEPT
8312	{
8313	Assert(cbMem < UINT8_MAX);
8314
8315	/* The essense of iemRegGetRspForPopEx and friends: / /* @todo put this into a inlined function? */
8316	RTGCPTR GCPtrTop;
8317	if (pVCpu->iem.s.enmCpuMode == IEMMODE_64BIT)
8318	GCPtrTop = uCurNewRsp;
8319	else if (pVCpu->cpum.GstCtx.ss.Attr.n.u1DefBig)
8320	GCPtrTop = (uint32_t)uCurNewRsp;
8321	else
8322	GCPtrTop = (uint16_t)uCurNewRsp;
8323
8324	return iemMemMap(pVCpu, (void **)ppvMem, cbMem, X86_SREG_SS, GCPtrTop + off, IEM_ACCESS_STACK_R,
8325	0 /* checked in iemMemStackPopBeginSpecial */);
8326	}
8327
8328
8329	/**
8330	* Done with a special stack pop (started by iemMemStackPopBeginSpecial or
8331	* iemMemStackPopContinueSpecial).
8332	*
8333	* The caller will manually commit the rSP.
8334	*
8335	* @returns Strict VBox status code.
8336	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8337	* @param pvMem The pointer returned by
8338	* iemMemStackPopBeginSpecial() or
8339	* iemMemStackPopContinueSpecial().
8340	*/
8341	VBOXSTRICTRC iemMemStackPopDoneSpecial(PVMCPUCC pVCpu, void const *pvMem) RT_NOEXCEPT
8342	{
8343	return iemMemCommitAndUnmap(pVCpu, (void *)pvMem, IEM_ACCESS_STACK_R);
8344	}
8345
8346
8347	/**
8348	* Fetches a system table byte.
8349	*
8350	* @returns Strict VBox status code.
8351	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8352	* @param pbDst Where to return the byte.
8353	* @param iSegReg The index of the segment register to use for
8354	* this access. The base and limits are checked.
8355	* @param GCPtrMem The address of the guest memory.
8356	*/
8357	VBOXSTRICTRC iemMemFetchSysU8(PVMCPUCC pVCpu, uint8_t *pbDst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
8358	{
8359	/* The lazy approach for now... */
8360	uint8_t const *pbSrc;
8361	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pbSrc, sizeof(pbSrc), iSegReg, GCPtrMem, IEM_ACCESS_SYS_R, 0);
8362	if (rc == VINF_SUCCESS)
8363	{
8364	pbDst = pbSrc;
8365	rc = iemMemCommitAndUnmap(pVCpu, (void *)pbSrc, IEM_ACCESS_SYS_R);
8366	}
8367	return rc;
8368	}
8369
8370
8371	/**
8372	* Fetches a system table word.
8373	*
8374	* @returns Strict VBox status code.
8375	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8376	* @param pu16Dst Where to return the word.
8377	* @param iSegReg The index of the segment register to use for
8378	* this access. The base and limits are checked.
8379	* @param GCPtrMem The address of the guest memory.
8380	*/
8381	VBOXSTRICTRC iemMemFetchSysU16(PVMCPUCC pVCpu, uint16_t *pu16Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
8382	{
8383	/* The lazy approach for now... */
8384	uint16_t const *pu16Src;
8385	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu16Src, sizeof(pu16Src), iSegReg, GCPtrMem, IEM_ACCESS_SYS_R, 0);
8386	if (rc == VINF_SUCCESS)
8387	{
8388	pu16Dst = pu16Src;
8389	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu16Src, IEM_ACCESS_SYS_R);
8390	}
8391	return rc;
8392	}
8393
8394
8395	/**
8396	* Fetches a system table dword.
8397	*
8398	* @returns Strict VBox status code.
8399	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8400	* @param pu32Dst Where to return the dword.
8401	* @param iSegReg The index of the segment register to use for
8402	* this access. The base and limits are checked.
8403	* @param GCPtrMem The address of the guest memory.
8404	*/
8405	VBOXSTRICTRC iemMemFetchSysU32(PVMCPUCC pVCpu, uint32_t *pu32Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
8406	{
8407	/* The lazy approach for now... */
8408	uint32_t const *pu32Src;
8409	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu32Src, sizeof(pu32Src), iSegReg, GCPtrMem, IEM_ACCESS_SYS_R, 0);
8410	if (rc == VINF_SUCCESS)
8411	{
8412	pu32Dst = pu32Src;
8413	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu32Src, IEM_ACCESS_SYS_R);
8414	}
8415	return rc;
8416	}
8417
8418
8419	/**
8420	* Fetches a system table qword.
8421	*
8422	* @returns Strict VBox status code.
8423	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8424	* @param pu64Dst Where to return the qword.
8425	* @param iSegReg The index of the segment register to use for
8426	* this access. The base and limits are checked.
8427	* @param GCPtrMem The address of the guest memory.
8428	*/
8429	VBOXSTRICTRC iemMemFetchSysU64(PVMCPUCC pVCpu, uint64_t *pu64Dst, uint8_t iSegReg, RTGCPTR GCPtrMem) RT_NOEXCEPT
8430	{
8431	/* The lazy approach for now... */
8432	uint64_t const *pu64Src;
8433	VBOXSTRICTRC rc = iemMemMap(pVCpu, (void *)&pu64Src, sizeof(pu64Src), iSegReg, GCPtrMem, IEM_ACCESS_SYS_R, 0);
8434	if (rc == VINF_SUCCESS)
8435	{
8436	pu64Dst = pu64Src;
8437	rc = iemMemCommitAndUnmap(pVCpu, (void *)pu64Src, IEM_ACCESS_SYS_R);
8438	}
8439	return rc;
8440	}
8441
8442
8443	/**
8444	* Fetches a descriptor table entry with caller specified error code.
8445	*
8446	* @returns Strict VBox status code.
8447	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8448	* @param pDesc Where to return the descriptor table entry.
8449	* @param uSel The selector which table entry to fetch.
8450	* @param uXcpt The exception to raise on table lookup error.
8451	* @param uErrorCode The error code associated with the exception.
8452	*/
8453	static VBOXSTRICTRC iemMemFetchSelDescWithErr(PVMCPUCC pVCpu, PIEMSELDESC pDesc, uint16_t uSel,
8454	uint8_t uXcpt, uint16_t uErrorCode) RT_NOEXCEPT
8455	{
8456	AssertPtr(pDesc);
8457	IEM_CTX_IMPORT_RET(pVCpu, CPUMCTX_EXTRN_GDTR \| CPUMCTX_EXTRN_LDTR);
8458
8459	/** @todo did the 286 require all 8 bytes to be accessible? */
8460	/*
8461	* Get the selector table base and check bounds.
8462	*/
8463	RTGCPTR GCPtrBase;
8464	if (uSel & X86_SEL_LDT)
8465	{
8466	if ( !pVCpu->cpum.GstCtx.ldtr.Attr.n.u1Present
8467	\|\| (uSel \| X86_SEL_RPL_LDT) > pVCpu->cpum.GstCtx.ldtr.u32Limit )
8468	{
8469	Log(("iemMemFetchSelDesc: LDT selector %#x is out of bounds (%3x) or ldtr is NP (%#x)\n",
8470	uSel, pVCpu->cpum.GstCtx.ldtr.u32Limit, pVCpu->cpum.GstCtx.ldtr.Sel));
8471	return iemRaiseXcptOrInt(pVCpu, 0, uXcpt, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR,
8472	uErrorCode, 0);
8473	}
8474
8475	Assert(pVCpu->cpum.GstCtx.ldtr.Attr.n.u1Present);
8476	GCPtrBase = pVCpu->cpum.GstCtx.ldtr.u64Base;
8477	}
8478	else
8479	{
8480	if ((uSel \| X86_SEL_RPL_LDT) > pVCpu->cpum.GstCtx.gdtr.cbGdt)
8481	{
8482	Log(("iemMemFetchSelDesc: GDT selector %#x is out of bounds (%3x)\n", uSel, pVCpu->cpum.GstCtx.gdtr.cbGdt));
8483	return iemRaiseXcptOrInt(pVCpu, 0, uXcpt, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR,
8484	uErrorCode, 0);
8485	}
8486	GCPtrBase = pVCpu->cpum.GstCtx.gdtr.pGdt;
8487	}
8488
8489	/*
8490	* Read the legacy descriptor and maybe the long mode extensions if
8491	* required.
8492	*/
8493	VBOXSTRICTRC rcStrict;
8494	if (IEM_GET_TARGET_CPU(pVCpu) > IEMTARGETCPU_286)
8495	rcStrict = iemMemFetchSysU64(pVCpu, &pDesc->Legacy.u, UINT8_MAX, GCPtrBase + (uSel & X86_SEL_MASK));
8496	else
8497	{
8498	rcStrict = iemMemFetchSysU16(pVCpu, &pDesc->Legacy.au16[0], UINT8_MAX, GCPtrBase + (uSel & X86_SEL_MASK) + 0);
8499	if (rcStrict == VINF_SUCCESS)
8500	rcStrict = iemMemFetchSysU16(pVCpu, &pDesc->Legacy.au16[1], UINT8_MAX, GCPtrBase + (uSel & X86_SEL_MASK) + 2);
8501	if (rcStrict == VINF_SUCCESS)
8502	rcStrict = iemMemFetchSysU16(pVCpu, &pDesc->Legacy.au16[2], UINT8_MAX, GCPtrBase + (uSel & X86_SEL_MASK) + 4);
8503	if (rcStrict == VINF_SUCCESS)
8504	pDesc->Legacy.au16[3] = 0;
8505	else
8506	return rcStrict;
8507	}
8508
8509	if (rcStrict == VINF_SUCCESS)
8510	{
8511	if ( !IEM_IS_LONG_MODE(pVCpu)
8512	\|\| pDesc->Legacy.Gen.u1DescType)
8513	pDesc->Long.au64[1] = 0;
8514	else if ((uint32_t)(uSel \| X86_SEL_RPL_LDT) + 8 <= (uSel & X86_SEL_LDT ? pVCpu->cpum.GstCtx.ldtr.u32Limit : pVCpu->cpum.GstCtx.gdtr.cbGdt))
8515	rcStrict = iemMemFetchSysU64(pVCpu, &pDesc->Long.au64[1], UINT8_MAX, GCPtrBase + (uSel \| X86_SEL_RPL_LDT) + 1);
8516	else
8517	{
8518	Log(("iemMemFetchSelDesc: system selector %#x is out of bounds\n", uSel));
8519	/** @todo is this the right exception? */
8520	return iemRaiseXcptOrInt(pVCpu, 0, uXcpt, IEM_XCPT_FLAGS_T_CPU_XCPT \| IEM_XCPT_FLAGS_ERR, uErrorCode, 0);
8521	}
8522	}
8523	return rcStrict;
8524	}
8525
8526
8527	/**
8528	* Fetches a descriptor table entry.
8529	*
8530	* @returns Strict VBox status code.
8531	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8532	* @param pDesc Where to return the descriptor table entry.
8533	* @param uSel The selector which table entry to fetch.
8534	* @param uXcpt The exception to raise on table lookup error.
8535	*/
8536	VBOXSTRICTRC iemMemFetchSelDesc(PVMCPUCC pVCpu, PIEMSELDESC pDesc, uint16_t uSel, uint8_t uXcpt) RT_NOEXCEPT
8537	{
8538	return iemMemFetchSelDescWithErr(pVCpu, pDesc, uSel, uXcpt, uSel & X86_SEL_MASK_OFF_RPL);
8539	}
8540
8541
8542	/**
8543	* Marks the selector descriptor as accessed (only non-system descriptors).
8544	*
8545	* This function ASSUMES that iemMemFetchSelDesc has be called previously and
8546	* will therefore skip the limit checks.
8547	*
8548	* @returns Strict VBox status code.
8549	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8550	* @param uSel The selector.
8551	*/
8552	VBOXSTRICTRC iemMemMarkSelDescAccessed(PVMCPUCC pVCpu, uint16_t uSel) RT_NOEXCEPT
8553	{
8554	/*
8555	* Get the selector table base and calculate the entry address.
8556	*/
8557	RTGCPTR GCPtr = uSel & X86_SEL_LDT
8558	? pVCpu->cpum.GstCtx.ldtr.u64Base
8559	: pVCpu->cpum.GstCtx.gdtr.pGdt;
8560	GCPtr += uSel & X86_SEL_MASK;
8561
8562	/*
8563	* ASMAtomicBitSet will assert if the address is misaligned, so do some
8564	* ugly stuff to avoid this. This will make sure it's an atomic access
8565	* as well more or less remove any question about 8-bit or 32-bit accesss.
8566	*/
8567	VBOXSTRICTRC rcStrict;
8568	uint32_t volatile *pu32;
8569	if ((GCPtr & 3) == 0)
8570	{
8571	/* The normal case, map the 32-bit bits around the accessed bit (40). */
8572	GCPtr += 2 + 2;
8573	rcStrict = iemMemMap(pVCpu, (void **)&pu32, 4, UINT8_MAX, GCPtr, IEM_ACCESS_SYS_RW, 0);
8574	if (rcStrict != VINF_SUCCESS)
8575	return rcStrict;
8576	ASMAtomicBitSet(pu32, 8); /* X86_SEL_TYPE_ACCESSED is 1, but it is preceeded by u8BaseHigh1. */
8577	}
8578	else
8579	{
8580	/* The misaligned GDT/LDT case, map the whole thing. */
8581	rcStrict = iemMemMap(pVCpu, (void **)&pu32, 8, UINT8_MAX, GCPtr, IEM_ACCESS_SYS_RW, 0);
8582	if (rcStrict != VINF_SUCCESS)
8583	return rcStrict;
8584	switch ((uintptr_t)pu32 & 3)
8585	{
8586	case 0: ASMAtomicBitSet(pu32, 40 + 0 - 0); break;
8587	case 1: ASMAtomicBitSet((uint8_t volatile *)pu32 + 3, 40 + 0 - 24); break;
8588	case 2: ASMAtomicBitSet((uint8_t volatile *)pu32 + 2, 40 + 0 - 16); break;
8589	case 3: ASMAtomicBitSet((uint8_t volatile *)pu32 + 1, 40 + 0 - 8); break;
8590	}
8591	}
8592
8593	return iemMemCommitAndUnmap(pVCpu, (void *)pu32, IEM_ACCESS_SYS_RW);
8594	}
8595
8596	/** @} */
8597
8598	/** @name Opcode Helpers.
8599	* @{
8600	*/
8601
8602	/**
8603	* Calculates the effective address of a ModR/M memory operand.
8604	*
8605	* Meant to be used via IEM_MC_CALC_RM_EFF_ADDR.
8606	*
8607	* @return Strict VBox status code.
8608	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8609	* @param bRm The ModRM byte.
8610	* @param cbImm The size of any immediate following the
8611	* effective address opcode bytes. Important for
8612	* RIP relative addressing.
8613	* @param pGCPtrEff Where to return the effective address.
8614	*/
8615	VBOXSTRICTRC iemOpHlpCalcRmEffAddr(PVMCPUCC pVCpu, uint8_t bRm, uint8_t cbImm, PRTGCPTR pGCPtrEff) RT_NOEXCEPT
8616	{
8617	Log5(("iemOpHlpCalcRmEffAddr: bRm=%#x\n", bRm));
8618	# define SET_SS_DEF() \
8619	do \
8620	{ \
8621	if (!(pVCpu->iem.s.fPrefixes & IEM_OP_PRF_SEG_MASK)) \
8622	pVCpu->iem.s.iEffSeg = X86_SREG_SS; \
8623	} while (0)
8624
8625	if (pVCpu->iem.s.enmCpuMode != IEMMODE_64BIT)
8626	{
8627	/** @todo Check the effective address size crap! */
8628	if (pVCpu->iem.s.enmEffAddrMode == IEMMODE_16BIT)
8629	{
8630	uint16_t u16EffAddr;
8631
8632	/* Handle the disp16 form with no registers first. */
8633	if ((bRm & (X86_MODRM_MOD_MASK \| X86_MODRM_RM_MASK)) == 6)
8634	IEM_OPCODE_GET_NEXT_U16(&u16EffAddr);
8635	else
8636	{
8637	/* Get the displacment. */
8638	switch ((bRm >> X86_MODRM_MOD_SHIFT) & X86_MODRM_MOD_SMASK)
8639	{
8640	case 0: u16EffAddr = 0; break;
8641	case 1: IEM_OPCODE_GET_NEXT_S8_SX_U16(&u16EffAddr); break;
8642	case 2: IEM_OPCODE_GET_NEXT_U16(&u16EffAddr); break;
8643	default: AssertFailedReturn(VERR_IEM_IPE_1); /* (caller checked for these) */
8644	}
8645
8646	/* Add the base and index registers to the disp. */
8647	switch (bRm & X86_MODRM_RM_MASK)
8648	{
8649	case 0: u16EffAddr += pVCpu->cpum.GstCtx.bx + pVCpu->cpum.GstCtx.si; break;
8650	case 1: u16EffAddr += pVCpu->cpum.GstCtx.bx + pVCpu->cpum.GstCtx.di; break;
8651	case 2: u16EffAddr += pVCpu->cpum.GstCtx.bp + pVCpu->cpum.GstCtx.si; SET_SS_DEF(); break;
8652	case 3: u16EffAddr += pVCpu->cpum.GstCtx.bp + pVCpu->cpum.GstCtx.di; SET_SS_DEF(); break;
8653	case 4: u16EffAddr += pVCpu->cpum.GstCtx.si; break;
8654	case 5: u16EffAddr += pVCpu->cpum.GstCtx.di; break;
8655	case 6: u16EffAddr += pVCpu->cpum.GstCtx.bp; SET_SS_DEF(); break;
8656	case 7: u16EffAddr += pVCpu->cpum.GstCtx.bx; break;
8657	}
8658	}
8659
8660	*pGCPtrEff = u16EffAddr;
8661	}
8662	else
8663	{
8664	Assert(pVCpu->iem.s.enmEffAddrMode == IEMMODE_32BIT);
8665	uint32_t u32EffAddr;
8666
8667	/* Handle the disp32 form with no registers first. */
8668	if ((bRm & (X86_MODRM_MOD_MASK \| X86_MODRM_RM_MASK)) == 5)
8669	IEM_OPCODE_GET_NEXT_U32(&u32EffAddr);
8670	else
8671	{
8672	/* Get the register (or SIB) value. */
8673	switch ((bRm & X86_MODRM_RM_MASK))
8674	{
8675	case 0: u32EffAddr = pVCpu->cpum.GstCtx.eax; break;
8676	case 1: u32EffAddr = pVCpu->cpum.GstCtx.ecx; break;
8677	case 2: u32EffAddr = pVCpu->cpum.GstCtx.edx; break;
8678	case 3: u32EffAddr = pVCpu->cpum.GstCtx.ebx; break;
8679	case 4: /* SIB */
8680	{
8681	uint8_t bSib; IEM_OPCODE_GET_NEXT_U8(&bSib);
8682
8683	/* Get the index and scale it. */
8684	switch ((bSib >> X86_SIB_INDEX_SHIFT) & X86_SIB_INDEX_SMASK)
8685	{
8686	case 0: u32EffAddr = pVCpu->cpum.GstCtx.eax; break;
8687	case 1: u32EffAddr = pVCpu->cpum.GstCtx.ecx; break;
8688	case 2: u32EffAddr = pVCpu->cpum.GstCtx.edx; break;
8689	case 3: u32EffAddr = pVCpu->cpum.GstCtx.ebx; break;
8690	case 4: u32EffAddr = 0; /none / break;
8691	case 5: u32EffAddr = pVCpu->cpum.GstCtx.ebp; break;
8692	case 6: u32EffAddr = pVCpu->cpum.GstCtx.esi; break;
8693	case 7: u32EffAddr = pVCpu->cpum.GstCtx.edi; break;
8694	IEM_NOT_REACHED_DEFAULT_CASE_RET();
8695	}
8696	u32EffAddr <<= (bSib >> X86_SIB_SCALE_SHIFT) & X86_SIB_SCALE_SMASK;
8697
8698	/* add base */
8699	switch (bSib & X86_SIB_BASE_MASK)
8700	{
8701	case 0: u32EffAddr += pVCpu->cpum.GstCtx.eax; break;
8702	case 1: u32EffAddr += pVCpu->cpum.GstCtx.ecx; break;
8703	case 2: u32EffAddr += pVCpu->cpum.GstCtx.edx; break;
8704	case 3: u32EffAddr += pVCpu->cpum.GstCtx.ebx; break;
8705	case 4: u32EffAddr += pVCpu->cpum.GstCtx.esp; SET_SS_DEF(); break;
8706	case 5:
8707	if ((bRm & X86_MODRM_MOD_MASK) != 0)
8708	{
8709	u32EffAddr += pVCpu->cpum.GstCtx.ebp;
8710	SET_SS_DEF();
8711	}
8712	else
8713	{
8714	uint32_t u32Disp;
8715	IEM_OPCODE_GET_NEXT_U32(&u32Disp);
8716	u32EffAddr += u32Disp;
8717	}
8718	break;
8719	case 6: u32EffAddr += pVCpu->cpum.GstCtx.esi; break;
8720	case 7: u32EffAddr += pVCpu->cpum.GstCtx.edi; break;
8721	IEM_NOT_REACHED_DEFAULT_CASE_RET();
8722	}
8723	break;
8724	}
8725	case 5: u32EffAddr = pVCpu->cpum.GstCtx.ebp; SET_SS_DEF(); break;
8726	case 6: u32EffAddr = pVCpu->cpum.GstCtx.esi; break;
8727	case 7: u32EffAddr = pVCpu->cpum.GstCtx.edi; break;
8728	IEM_NOT_REACHED_DEFAULT_CASE_RET();
8729	}
8730
8731	/* Get and add the displacement. */
8732	switch ((bRm >> X86_MODRM_MOD_SHIFT) & X86_MODRM_MOD_SMASK)
8733	{
8734	case 0:
8735	break;
8736	case 1:
8737	{
8738	int8_t i8Disp; IEM_OPCODE_GET_NEXT_S8(&i8Disp);
8739	u32EffAddr += i8Disp;
8740	break;
8741	}
8742	case 2:
8743	{
8744	uint32_t u32Disp; IEM_OPCODE_GET_NEXT_U32(&u32Disp);
8745	u32EffAddr += u32Disp;
8746	break;
8747	}
8748	default:
8749	AssertFailedReturn(VERR_IEM_IPE_2); /* (caller checked for these) */
8750	}
8751
8752	}
8753	if (pVCpu->iem.s.enmEffAddrMode == IEMMODE_32BIT)
8754	*pGCPtrEff = u32EffAddr;
8755	else
8756	{
8757	Assert(pVCpu->iem.s.enmEffAddrMode == IEMMODE_16BIT);
8758	*pGCPtrEff = u32EffAddr & UINT16_MAX;
8759	}
8760	}
8761	}
8762	else
8763	{
8764	uint64_t u64EffAddr;
8765
8766	/* Handle the rip+disp32 form with no registers first. */
8767	if ((bRm & (X86_MODRM_MOD_MASK \| X86_MODRM_RM_MASK)) == 5)
8768	{
8769	IEM_OPCODE_GET_NEXT_S32_SX_U64(&u64EffAddr);
8770	u64EffAddr += pVCpu->cpum.GstCtx.rip + IEM_GET_INSTR_LEN(pVCpu) + cbImm;
8771	}
8772	else
8773	{
8774	/* Get the register (or SIB) value. */
8775	switch ((bRm & X86_MODRM_RM_MASK) \| pVCpu->iem.s.uRexB)
8776	{
8777	case 0: u64EffAddr = pVCpu->cpum.GstCtx.rax; break;
8778	case 1: u64EffAddr = pVCpu->cpum.GstCtx.rcx; break;
8779	case 2: u64EffAddr = pVCpu->cpum.GstCtx.rdx; break;
8780	case 3: u64EffAddr = pVCpu->cpum.GstCtx.rbx; break;
8781	case 5: u64EffAddr = pVCpu->cpum.GstCtx.rbp; SET_SS_DEF(); break;
8782	case 6: u64EffAddr = pVCpu->cpum.GstCtx.rsi; break;
8783	case 7: u64EffAddr = pVCpu->cpum.GstCtx.rdi; break;
8784	case 8: u64EffAddr = pVCpu->cpum.GstCtx.r8; break;
8785	case 9: u64EffAddr = pVCpu->cpum.GstCtx.r9; break;
8786	case 10: u64EffAddr = pVCpu->cpum.GstCtx.r10; break;
8787	case 11: u64EffAddr = pVCpu->cpum.GstCtx.r11; break;
8788	case 13: u64EffAddr = pVCpu->cpum.GstCtx.r13; break;
8789	case 14: u64EffAddr = pVCpu->cpum.GstCtx.r14; break;
8790	case 15: u64EffAddr = pVCpu->cpum.GstCtx.r15; break;
8791	/* SIB */
8792	case 4:
8793	case 12:
8794	{
8795	uint8_t bSib; IEM_OPCODE_GET_NEXT_U8(&bSib);
8796
8797	/* Get the index and scale it. */
8798	switch (((bSib >> X86_SIB_INDEX_SHIFT) & X86_SIB_INDEX_SMASK) \| pVCpu->iem.s.uRexIndex)
8799	{
8800	case 0: u64EffAddr = pVCpu->cpum.GstCtx.rax; break;
8801	case 1: u64EffAddr = pVCpu->cpum.GstCtx.rcx; break;
8802	case 2: u64EffAddr = pVCpu->cpum.GstCtx.rdx; break;
8803	case 3: u64EffAddr = pVCpu->cpum.GstCtx.rbx; break;
8804	case 4: u64EffAddr = 0; /none / break;
8805	case 5: u64EffAddr = pVCpu->cpum.GstCtx.rbp; break;
8806	case 6: u64EffAddr = pVCpu->cpum.GstCtx.rsi; break;
8807	case 7: u64EffAddr = pVCpu->cpum.GstCtx.rdi; break;
8808	case 8: u64EffAddr = pVCpu->cpum.GstCtx.r8; break;
8809	case 9: u64EffAddr = pVCpu->cpum.GstCtx.r9; break;
8810	case 10: u64EffAddr = pVCpu->cpum.GstCtx.r10; break;
8811	case 11: u64EffAddr = pVCpu->cpum.GstCtx.r11; break;
8812	case 12: u64EffAddr = pVCpu->cpum.GstCtx.r12; break;
8813	case 13: u64EffAddr = pVCpu->cpum.GstCtx.r13; break;
8814	case 14: u64EffAddr = pVCpu->cpum.GstCtx.r14; break;
8815	case 15: u64EffAddr = pVCpu->cpum.GstCtx.r15; break;
8816	IEM_NOT_REACHED_DEFAULT_CASE_RET();
8817	}
8818	u64EffAddr <<= (bSib >> X86_SIB_SCALE_SHIFT) & X86_SIB_SCALE_SMASK;
8819
8820	/* add base */
8821	switch ((bSib & X86_SIB_BASE_MASK) \| pVCpu->iem.s.uRexB)
8822	{
8823	case 0: u64EffAddr += pVCpu->cpum.GstCtx.rax; break;
8824	case 1: u64EffAddr += pVCpu->cpum.GstCtx.rcx; break;
8825	case 2: u64EffAddr += pVCpu->cpum.GstCtx.rdx; break;
8826	case 3: u64EffAddr += pVCpu->cpum.GstCtx.rbx; break;
8827	case 4: u64EffAddr += pVCpu->cpum.GstCtx.rsp; SET_SS_DEF(); break;
8828	case 6: u64EffAddr += pVCpu->cpum.GstCtx.rsi; break;
8829	case 7: u64EffAddr += pVCpu->cpum.GstCtx.rdi; break;
8830	case 8: u64EffAddr += pVCpu->cpum.GstCtx.r8; break;
8831	case 9: u64EffAddr += pVCpu->cpum.GstCtx.r9; break;
8832	case 10: u64EffAddr += pVCpu->cpum.GstCtx.r10; break;
8833	case 11: u64EffAddr += pVCpu->cpum.GstCtx.r11; break;
8834	case 12: u64EffAddr += pVCpu->cpum.GstCtx.r12; break;
8835	case 14: u64EffAddr += pVCpu->cpum.GstCtx.r14; break;
8836	case 15: u64EffAddr += pVCpu->cpum.GstCtx.r15; break;
8837	/* complicated encodings */
8838	case 5:
8839	case 13:
8840	if ((bRm & X86_MODRM_MOD_MASK) != 0)
8841	{
8842	if (!pVCpu->iem.s.uRexB)
8843	{
8844	u64EffAddr += pVCpu->cpum.GstCtx.rbp;
8845	SET_SS_DEF();
8846	}
8847	else
8848	u64EffAddr += pVCpu->cpum.GstCtx.r13;
8849	}
8850	else
8851	{
8852	uint32_t u32Disp;
8853	IEM_OPCODE_GET_NEXT_U32(&u32Disp);
8854	u64EffAddr += (int32_t)u32Disp;
8855	}
8856	break;
8857	IEM_NOT_REACHED_DEFAULT_CASE_RET();
8858	}
8859	break;
8860	}
8861	IEM_NOT_REACHED_DEFAULT_CASE_RET();
8862	}
8863
8864	/* Get and add the displacement. */
8865	switch ((bRm >> X86_MODRM_MOD_SHIFT) & X86_MODRM_MOD_SMASK)
8866	{
8867	case 0:
8868	break;
8869	case 1:
8870	{
8871	int8_t i8Disp;
8872	IEM_OPCODE_GET_NEXT_S8(&i8Disp);
8873	u64EffAddr += i8Disp;
8874	break;
8875	}
8876	case 2:
8877	{
8878	uint32_t u32Disp;
8879	IEM_OPCODE_GET_NEXT_U32(&u32Disp);
8880	u64EffAddr += (int32_t)u32Disp;
8881	break;
8882	}
8883	IEM_NOT_REACHED_DEFAULT_CASE_RET(); /* (caller checked for these) */
8884	}
8885
8886	}
8887
8888	if (pVCpu->iem.s.enmEffAddrMode == IEMMODE_64BIT)
8889	*pGCPtrEff = u64EffAddr;
8890	else
8891	{
8892	Assert(pVCpu->iem.s.enmEffAddrMode == IEMMODE_32BIT);
8893	*pGCPtrEff = u64EffAddr & UINT32_MAX;
8894	}
8895	}
8896
8897	Log5(("iemOpHlpCalcRmEffAddr: EffAddr=%#010RGv\n", *pGCPtrEff));
8898	return VINF_SUCCESS;
8899	}
8900
8901
8902	/**
8903	* Calculates the effective address of a ModR/M memory operand.
8904	*
8905	* Meant to be used via IEM_MC_CALC_RM_EFF_ADDR.
8906	*
8907	* @return Strict VBox status code.
8908	* @param pVCpu The cross context virtual CPU structure of the calling thread.
8909	* @param bRm The ModRM byte.
8910	* @param cbImm The size of any immediate following the
8911	* effective address opcode bytes. Important for
8912	* RIP relative addressing.
8913	* @param pGCPtrEff Where to return the effective address.
8914	* @param offRsp RSP displacement.
8915	*/
8916	VBOXSTRICTRC iemOpHlpCalcRmEffAddrEx(PVMCPUCC pVCpu, uint8_t bRm, uint8_t cbImm, PRTGCPTR pGCPtrEff, int8_t offRsp) RT_NOEXCEPT
8917	{
8918	Log5(("iemOpHlpCalcRmEffAddr: bRm=%#x\n", bRm));
8919	# define SET_SS_DEF() \
8920	do \
8921	{ \
8922	if (!(pVCpu->iem.s.fPrefixes & IEM_OP_PRF_SEG_MASK)) \
8923	pVCpu->iem.s.iEffSeg = X86_SREG_SS; \
8924	} while (0)
8925
8926	if (pVCpu->iem.s.enmCpuMode != IEMMODE_64BIT)
8927	{
8928	/** @todo Check the effective address size crap! */
8929	if (pVCpu->iem.s.enmEffAddrMode == IEMMODE_16BIT)
8930	{
8931	uint16_t u16EffAddr;
8932
8933	/* Handle the disp16 form with no registers first. */
8934	if ((bRm & (X86_MODRM_MOD_MASK \| X86_MODRM_RM_MASK)) == 6)
8935	IEM_OPCODE_GET_NEXT_U16(&u16EffAddr);
8936	else
8937	{
8938	/* Get the displacment. */
8939	switch ((bRm >> X86_MODRM_MOD_SHIFT) & X86_MODRM_MOD_SMASK)
8940	{
8941	case 0: u16EffAddr = 0; break;
8942	case 1: IEM_OPCODE_GET_NEXT_S8_SX_U16(&u16EffAddr); break;
8943	case 2: IEM_OPCODE_GET_NEXT_U16(&u16EffAddr); break;
8944	default: AssertFailedReturn(VERR_IEM_IPE_1); /* (caller checked for these) */
8945	}
8946
8947	/* Add the base and index registers to the disp. */
8948	switch (bRm & X86_MODRM_RM_MASK)
8949	{
8950	case 0: u16EffAddr += pVCpu->cpum.GstCtx.bx + pVCpu->cpum.GstCtx.si; break;
8951	case 1: u16EffAddr += pVCpu->cpum.GstCtx.bx + pVCpu->cpum.GstCtx.di; break;
8952	case 2: u16EffAddr += pVCpu->cpum.GstCtx.bp + pVCpu->cpum.GstCtx.si; SET_SS_DEF(); break;
8953	case 3: u16EffAddr += pVCpu->cpum.GstCtx.bp + pVCpu->cpum.GstCtx.di; SET_SS_DEF(); break;
8954	case 4: u16EffAddr += pVCpu->cpum.GstCtx.si; break;
8955	case 5: u16EffAddr += pVCpu->cpum.GstCtx.di; break;
8956	case 6: u16EffAddr += pVCpu->cpum.GstCtx.bp; SET_SS_DEF(); break;
8957	case 7: u16EffAddr += pVCpu->cpum.GstCtx.bx; break;
8958	}
8959	}
8960
8961	*pGCPtrEff = u16EffAddr;
8962	}
8963	else
8964	{
8965	Assert(pVCpu->iem.s.enmEffAddrMode == IEMMODE_32BIT);
8966	uint32_t u32EffAddr;
8967
8968	/* Handle the disp32 form with no registers first. */
8969	if ((bRm & (X86_MODRM_MOD_MASK \| X86_MODRM_RM_MASK)) == 5)
8970	IEM_OPCODE_GET_NEXT_U32(&u32EffAddr);
8971	else
8972	{
8973	/* Get the register (or SIB) value. */
8974	switch ((bRm & X86_MODRM_RM_MASK))
8975	{
8976	case 0: u32EffAddr = pVCpu->cpum.GstCtx.eax; break;
8977	case 1: u32EffAddr = pVCpu->cpum.GstCtx.ecx; break;
8978	case 2: u32EffAddr = pVCpu->cpum.GstCtx.edx; break;
8979	case 3: u32EffAddr = pVCpu->cpum.GstCtx.ebx; break;
8980	case 4: /* SIB */
8981	{
8982	uint8_t bSib; IEM_OPCODE_GET_NEXT_U8(&bSib);
8983
8984	/* Get the index and scale it. */
8985	switch ((bSib >> X86_SIB_INDEX_SHIFT) & X86_SIB_INDEX_SMASK)
8986	{
8987	case 0: u32EffAddr = pVCpu->cpum.GstCtx.eax; break;
8988	case 1: u32EffAddr = pVCpu->cpum.GstCtx.ecx; break;
8989	case 2: u32EffAddr = pVCpu->cpum.GstCtx.edx; break;
8990	case 3: u32EffAddr = pVCpu->cpum.GstCtx.ebx; break;
8991	case 4: u32EffAddr = 0; /none / break;
8992	case 5: u32EffAddr = pVCpu->cpum.GstCtx.ebp; break;
8993	case 6: u32EffAddr = pVCpu->cpum.GstCtx.esi; break;
8994	case 7: u32EffAddr = pVCpu->cpum.GstCtx.edi; break;
8995	IEM_NOT_REACHED_DEFAULT_CASE_RET();
8996	}
8997	u32EffAddr <<= (bSib >> X86_SIB_SCALE_SHIFT) & X86_SIB_SCALE_SMASK;
8998
8999	/* add base */
9000	switch (bSib & X86_SIB_BASE_MASK)
9001	{
9002	case 0: u32EffAddr += pVCpu->cpum.GstCtx.eax; break;
9003	case 1: u32EffAddr += pVCpu->cpum.GstCtx.ecx; break;
9004	case 2: u32EffAddr += pVCpu->cpum.GstCtx.edx; break;
9005	case 3: u32EffAddr += pVCpu->cpum.GstCtx.ebx; break;
9006	case 4:
9007	u32EffAddr += pVCpu->cpum.GstCtx.esp + offRsp;
9008	SET_SS_DEF();
9009	break;
9010	case 5:
9011	if ((bRm & X86_MODRM_MOD_MASK) != 0)
9012	{
9013	u32EffAddr += pVCpu->cpum.GstCtx.ebp;
9014	SET_SS_DEF();
9015	}
9016	else
9017	{
9018	uint32_t u32Disp;
9019	IEM_OPCODE_GET_NEXT_U32(&u32Disp);
9020	u32EffAddr += u32Disp;
9021	}
9022	break;
9023	case 6: u32EffAddr += pVCpu->cpum.GstCtx.esi; break;
9024	case 7: u32EffAddr += pVCpu->cpum.GstCtx.edi; break;
9025	IEM_NOT_REACHED_DEFAULT_CASE_RET();
9026	}
9027	break;
9028	}
9029	case 5: u32EffAddr = pVCpu->cpum.GstCtx.ebp; SET_SS_DEF(); break;
9030	case 6: u32EffAddr = pVCpu->cpum.GstCtx.esi; break;
9031	case 7: u32EffAddr = pVCpu->cpum.GstCtx.edi; break;
9032	IEM_NOT_REACHED_DEFAULT_CASE_RET();
9033	}
9034
9035	/* Get and add the displacement. */
9036	switch ((bRm >> X86_MODRM_MOD_SHIFT) & X86_MODRM_MOD_SMASK)
9037	{
9038	case 0:
9039	break;
9040	case 1:
9041	{
9042	int8_t i8Disp; IEM_OPCODE_GET_NEXT_S8(&i8Disp);
9043	u32EffAddr += i8Disp;
9044	break;
9045	}
9046	case 2:
9047	{
9048	uint32_t u32Disp; IEM_OPCODE_GET_NEXT_U32(&u32Disp);
9049	u32EffAddr += u32Disp;
9050	break;
9051	}
9052	default:
9053	AssertFailedReturn(VERR_IEM_IPE_2); /* (caller checked for these) */
9054	}
9055
9056	}
9057	if (pVCpu->iem.s.enmEffAddrMode == IEMMODE_32BIT)
9058	*pGCPtrEff = u32EffAddr;
9059	else
9060	{
9061	Assert(pVCpu->iem.s.enmEffAddrMode == IEMMODE_16BIT);
9062	*pGCPtrEff = u32EffAddr & UINT16_MAX;
9063	}
9064	}
9065	}
9066	else
9067	{
9068	uint64_t u64EffAddr;
9069
9070	/* Handle the rip+disp32 form with no registers first. */
9071	if ((bRm & (X86_MODRM_MOD_MASK \| X86_MODRM_RM_MASK)) == 5)
9072	{
9073	IEM_OPCODE_GET_NEXT_S32_SX_U64(&u64EffAddr);
9074	u64EffAddr += pVCpu->cpum.GstCtx.rip + IEM_GET_INSTR_LEN(pVCpu) + cbImm;
9075	}
9076	else
9077	{
9078	/* Get the register (or SIB) value. */
9079	switch ((bRm & X86_MODRM_RM_MASK) \| pVCpu->iem.s.uRexB)
9080	{
9081	case 0: u64EffAddr = pVCpu->cpum.GstCtx.rax; break;
9082	case 1: u64EffAddr = pVCpu->cpum.GstCtx.rcx; break;
9083	case 2: u64EffAddr = pVCpu->cpum.GstCtx.rdx; break;
9084	case 3: u64EffAddr = pVCpu->cpum.GstCtx.rbx; break;
9085	case 5: u64EffAddr = pVCpu->cpum.GstCtx.rbp; SET_SS_DEF(); break;
9086	case 6: u64EffAddr = pVCpu->cpum.GstCtx.rsi; break;
9087	case 7: u64EffAddr = pVCpu->cpum.GstCtx.rdi; break;
9088	case 8: u64EffAddr = pVCpu->cpum.GstCtx.r8; break;
9089	case 9: u64EffAddr = pVCpu->cpum.GstCtx.r9; break;
9090	case 10: u64EffAddr = pVCpu->cpum.GstCtx.r10; break;
9091	case 11: u64EffAddr = pVCpu->cpum.GstCtx.r11; break;
9092	case 13: u64EffAddr = pVCpu->cpum.GstCtx.r13; break;
9093	case 14: u64EffAddr = pVCpu->cpum.GstCtx.r14; break;
9094	case 15: u64EffAddr = pVCpu->cpum.GstCtx.r15; break;
9095	/* SIB */
9096	case 4:
9097	case 12:
9098	{
9099	uint8_t bSib; IEM_OPCODE_GET_NEXT_U8(&bSib);
9100
9101	/* Get the index and scale it. */
9102	switch (((bSib >> X86_SIB_INDEX_SHIFT) & X86_SIB_INDEX_SMASK) \| pVCpu->iem.s.uRexIndex)
9103	{
9104	case 0: u64EffAddr = pVCpu->cpum.GstCtx.rax; break;
9105	case 1: u64EffAddr = pVCpu->cpum.GstCtx.rcx; break;
9106	case 2: u64EffAddr = pVCpu->cpum.GstCtx.rdx; break;
9107	case 3: u64EffAddr = pVCpu->cpum.GstCtx.rbx; break;
9108	case 4: u64EffAddr = 0; /none / break;
9109	case 5: u64EffAddr = pVCpu->cpum.GstCtx.rbp; break;
9110	case 6: u64EffAddr = pVCpu->cpum.GstCtx.rsi; break;
9111	case 7: u64EffAddr = pVCpu->cpum.GstCtx.rdi; break;
9112	case 8: u64EffAddr = pVCpu->cpum.GstCtx.r8; break;
9113	case 9: u64EffAddr = pVCpu->cpum.GstCtx.r9; break;
9114	case 10: u64EffAddr = pVCpu->cpum.GstCtx.r10; break;
9115	case 11: u64EffAddr = pVCpu->cpum.GstCtx.r11; break;
9116	case 12: u64EffAddr = pVCpu->cpum.GstCtx.r12; break;
9117	case 13: u64EffAddr = pVCpu->cpum.GstCtx.r13; break;
9118	case 14: u64EffAddr = pVCpu->cpum.GstCtx.r14; break;
9119	case 15: u64EffAddr = pVCpu->cpum.GstCtx.r15; break;
9120	IEM_NOT_REACHED_DEFAULT_CASE_RET();
9121	}
9122	u64EffAddr <<= (bSib >> X86_SIB_SCALE_SHIFT) & X86_SIB_SCALE_SMASK;
9123
9124	/* add base */
9125	switch ((bSib & X86_SIB_BASE_MASK) \| pVCpu->iem.s.uRexB)
9126	{
9127	case 0: u64EffAddr += pVCpu->cpum.GstCtx.rax; break;
9128	case 1: u64EffAddr += pVCpu->cpum.GstCtx.rcx; break;
9129	case 2: u64EffAddr += pVCpu->cpum.GstCtx.rdx; break;
9130	case 3: u64EffAddr += pVCpu->cpum.GstCtx.rbx; break;
9131	case 4: u64EffAddr += pVCpu->cpum.GstCtx.rsp + offRsp; SET_SS_DEF(); break;
9132	case 6: u64EffAddr += pVCpu->cpum.GstCtx.rsi; break;
9133	case 7: u64EffAddr += pVCpu->cpum.GstCtx.rdi; break;
9134	case 8: u64EffAddr += pVCpu->cpum.GstCtx.r8; break;
9135	case 9: u64EffAddr += pVCpu->cpum.GstCtx.r9; break;
9136	case 10: u64EffAddr += pVCpu->cpum.GstCtx.r10; break;
9137	case 11: u64EffAddr += pVCpu->cpum.GstCtx.r11; break;
9138	case 12: u64EffAddr += pVCpu->cpum.GstCtx.r12; break;
9139	case 14: u64EffAddr += pVCpu->cpum.GstCtx.r14; break;
9140	case 15: u64EffAddr += pVCpu->cpum.GstCtx.r15; break;
9141	/* complicated encodings */
9142	case 5:
9143	case 13:
9144	if ((bRm & X86_MODRM_MOD_MASK) != 0)
9145	{
9146	if (!pVCpu->iem.s.uRexB)
9147	{
9148	u64EffAddr += pVCpu->cpum.GstCtx.rbp;
9149	SET_SS_DEF();
9150	}
9151	else
9152	u64EffAddr += pVCpu->cpum.GstCtx.r13;
9153	}
9154	else
9155	{
9156	uint32_t u32Disp;
9157	IEM_OPCODE_GET_NEXT_U32(&u32Disp);
9158	u64EffAddr += (int32_t)u32Disp;
9159	}
9160	break;
9161	IEM_NOT_REACHED_DEFAULT_CASE_RET();
9162	}
9163	break;
9164	}
9165	IEM_NOT_REACHED_DEFAULT_CASE_RET();
9166	}
9167
9168	/* Get and add the displacement. */
9169	switch ((bRm >> X86_MODRM_MOD_SHIFT) & X86_MODRM_MOD_SMASK)
9170	{
9171	case 0:
9172	break;
9173	case 1:
9174	{
9175	int8_t i8Disp;
9176	IEM_OPCODE_GET_NEXT_S8(&i8Disp);
9177	u64EffAddr += i8Disp;
9178	break;
9179	}
9180	case 2:
9181	{
9182	uint32_t u32Disp;
9183	IEM_OPCODE_GET_NEXT_U32(&u32Disp);
9184	u64EffAddr += (int32_t)u32Disp;
9185	break;
9186	}
9187	IEM_NOT_REACHED_DEFAULT_CASE_RET(); /* (caller checked for these) */
9188	}
9189
9190	}
9191
9192	if (pVCpu->iem.s.enmEffAddrMode == IEMMODE_64BIT)
9193	*pGCPtrEff = u64EffAddr;
9194	else
9195	{
9196	Assert(pVCpu->iem.s.enmEffAddrMode == IEMMODE_32BIT);
9197	*pGCPtrEff = u64EffAddr & UINT32_MAX;
9198	}
9199	}
9200
9201	Log5(("iemOpHlpCalcRmEffAddr: EffAddr=%#010RGv\n", *pGCPtrEff));
9202	return VINF_SUCCESS;
9203	}
9204
9205
9206	#ifdef IEM_WITH_SETJMP
9207	/**
9208	* Calculates the effective address of a ModR/M memory operand.
9209	*
9210	* Meant to be used via IEM_MC_CALC_RM_EFF_ADDR.
9211	*
9212	* May longjmp on internal error.
9213	*
9214	* @return The effective address.
9215	* @param pVCpu The cross context virtual CPU structure of the calling thread.
9216	* @param bRm The ModRM byte.
9217	* @param cbImm The size of any immediate following the
9218	* effective address opcode bytes. Important for
9219	* RIP relative addressing.
9220	*/
9221	RTGCPTR iemOpHlpCalcRmEffAddrJmp(PVMCPUCC pVCpu, uint8_t bRm, uint8_t cbImm) RT_NOEXCEPT
9222	{
9223	Log5(("iemOpHlpCalcRmEffAddrJmp: bRm=%#x\n", bRm));
9224	# define SET_SS_DEF() \
9225	do \
9226	{ \
9227	if (!(pVCpu->iem.s.fPrefixes & IEM_OP_PRF_SEG_MASK)) \
9228	pVCpu->iem.s.iEffSeg = X86_SREG_SS; \
9229	} while (0)
9230
9231	if (pVCpu->iem.s.enmCpuMode != IEMMODE_64BIT)
9232	{
9233	/** @todo Check the effective address size crap! */
9234	if (pVCpu->iem.s.enmEffAddrMode == IEMMODE_16BIT)
9235	{
9236	uint16_t u16EffAddr;
9237
9238	/* Handle the disp16 form with no registers first. */
9239	if ((bRm & (X86_MODRM_MOD_MASK \| X86_MODRM_RM_MASK)) == 6)
9240	IEM_OPCODE_GET_NEXT_U16(&u16EffAddr);
9241	else
9242	{
9243	/* Get the displacment. */
9244	switch ((bRm >> X86_MODRM_MOD_SHIFT) & X86_MODRM_MOD_SMASK)
9245	{
9246	case 0: u16EffAddr = 0; break;
9247	case 1: IEM_OPCODE_GET_NEXT_S8_SX_U16(&u16EffAddr); break;
9248	case 2: IEM_OPCODE_GET_NEXT_U16(&u16EffAddr); break;
9249	default: AssertFailedStmt(longjmp(pVCpu->iem.s.CTX_SUFF(pJmpBuf), VERR_IEM_IPE_1)); / (caller checked for these) */
9250	}
9251
9252	/* Add the base and index registers to the disp. */
9253	switch (bRm & X86_MODRM_RM_MASK)
9254	{
9255	case 0: u16EffAddr += pVCpu->cpum.GstCtx.bx + pVCpu->cpum.GstCtx.si; break;
9256	case 1: u16EffAddr += pVCpu->cpum.GstCtx.bx + pVCpu->cpum.GstCtx.di; break;
9257	case 2: u16EffAddr += pVCpu->cpum.GstCtx.bp + pVCpu->cpum.GstCtx.si; SET_SS_DEF(); break;
9258	case 3: u16EffAddr += pVCpu->cpum.GstCtx.bp + pVCpu->cpum.GstCtx.di; SET_SS_DEF(); break;
9259	case 4: u16EffAddr += pVCpu->cpum.GstCtx.si; break;
9260	case 5: u16EffAddr += pVCpu->cpum.GstCtx.di; break;
9261	case 6: u16EffAddr += pVCpu->cpum.GstCtx.bp; SET_SS_DEF(); break;
9262	case 7: u16EffAddr += pVCpu->cpum.GstCtx.bx; break;
9263	}
9264	}
9265
9266	Log5(("iemOpHlpCalcRmEffAddrJmp: EffAddr=%#06RX16\n", u16EffAddr));
9267	return u16EffAddr;
9268	}
9269
9270	Assert(pVCpu->iem.s.enmEffAddrMode == IEMMODE_32BIT);
9271	uint32_t u32EffAddr;
9272
9273	/* Handle the disp32 form with no registers first. */
9274	if ((bRm & (X86_MODRM_MOD_MASK \| X86_MODRM_RM_MASK)) == 5)
9275	IEM_OPCODE_GET_NEXT_U32(&u32EffAddr);
9276	else
9277	{
9278	/* Get the register (or SIB) value. */
9279	switch ((bRm & X86_MODRM_RM_MASK))
9280	{
9281	case 0: u32EffAddr = pVCpu->cpum.GstCtx.eax; break;
9282	case 1: u32EffAddr = pVCpu->cpum.GstCtx.ecx; break;
9283	case 2: u32EffAddr = pVCpu->cpum.GstCtx.edx; break;
9284	case 3: u32EffAddr = pVCpu->cpum.GstCtx.ebx; break;
9285	case 4: /* SIB */
9286	{
9287	uint8_t bSib; IEM_OPCODE_GET_NEXT_U8(&bSib);
9288
9289	/* Get the index and scale it. */
9290	switch ((bSib >> X86_SIB_INDEX_SHIFT) & X86_SIB_INDEX_SMASK)
9291	{
9292	case 0: u32EffAddr = pVCpu->cpum.GstCtx.eax; break;
9293	case 1: u32EffAddr = pVCpu->cpum.GstCtx.ecx; break;
9294	case 2: u32EffAddr = pVCpu->cpum.GstCtx.edx; break;
9295	case 3: u32EffAddr = pVCpu->cpum.GstCtx.ebx; break;
9296	case 4: u32EffAddr = 0; /none / break;
9297	case 5: u32EffAddr = pVCpu->cpum.GstCtx.ebp; break;
9298	case 6: u32EffAddr = pVCpu->cpum.GstCtx.esi; break;
9299	case 7: u32EffAddr = pVCpu->cpum.GstCtx.edi; break;
9300	IEM_NOT_REACHED_DEFAULT_CASE_RET2(RTGCPTR_MAX);
9301	}
9302	u32EffAddr <<= (bSib >> X86_SIB_SCALE_SHIFT) & X86_SIB_SCALE_SMASK;
9303
9304	/* add base */
9305	switch (bSib & X86_SIB_BASE_MASK)
9306	{
9307	case 0: u32EffAddr += pVCpu->cpum.GstCtx.eax; break;
9308	case 1: u32EffAddr += pVCpu->cpum.GstCtx.ecx; break;
9309	case 2: u32EffAddr += pVCpu->cpum.GstCtx.edx; break;
9310	case 3: u32EffAddr += pVCpu->cpum.GstCtx.ebx; break;
9311	case 4: u32EffAddr += pVCpu->cpum.GstCtx.esp; SET_SS_DEF(); break;
9312	case 5:
9313	if ((bRm & X86_MODRM_MOD_MASK) != 0)
9314	{
9315	u32EffAddr += pVCpu->cpum.GstCtx.ebp;
9316	SET_SS_DEF();
9317	}
9318	else
9319	{
9320	uint32_t u32Disp;
9321	IEM_OPCODE_GET_NEXT_U32(&u32Disp);
9322	u32EffAddr += u32Disp;
9323	}
9324	break;
9325	case 6: u32EffAddr += pVCpu->cpum.GstCtx.esi; break;
9326	case 7: u32EffAddr += pVCpu->cpum.GstCtx.edi; break;
9327	IEM_NOT_REACHED_DEFAULT_CASE_RET2(RTGCPTR_MAX);
9328	}
9329	break;
9330	}
9331	case 5: u32EffAddr = pVCpu->cpum.GstCtx.ebp; SET_SS_DEF(); break;
9332	case 6: u32EffAddr = pVCpu->cpum.GstCtx.esi; break;
9333	case 7: u32EffAddr = pVCpu->cpum.GstCtx.edi; break;
9334	IEM_NOT_REACHED_DEFAULT_CASE_RET2(RTGCPTR_MAX);
9335	}
9336
9337	/* Get and add the displacement. */
9338	switch ((bRm >> X86_MODRM_MOD_SHIFT) & X86_MODRM_MOD_SMASK)
9339	{
9340	case 0:
9341	break;
9342	case 1:
9343	{
9344	int8_t i8Disp; IEM_OPCODE_GET_NEXT_S8(&i8Disp);
9345	u32EffAddr += i8Disp;
9346	break;
9347	}
9348	case 2:
9349	{
9350	uint32_t u32Disp; IEM_OPCODE_GET_NEXT_U32(&u32Disp);
9351	u32EffAddr += u32Disp;
9352	break;
9353	}
9354	default:
9355	AssertFailedStmt(longjmp(pVCpu->iem.s.CTX_SUFF(pJmpBuf), VERR_IEM_IPE_2)); / (caller checked for these) */
9356	}
9357	}
9358
9359	if (pVCpu->iem.s.enmEffAddrMode == IEMMODE_32BIT)
9360	{
9361	Log5(("iemOpHlpCalcRmEffAddrJmp: EffAddr=%#010RX32\n", u32EffAddr));
9362	return u32EffAddr;
9363	}
9364	Assert(pVCpu->iem.s.enmEffAddrMode == IEMMODE_16BIT);
9365	Log5(("iemOpHlpCalcRmEffAddrJmp: EffAddr=%#06RX32\n", u32EffAddr & UINT16_MAX));
9366	return u32EffAddr & UINT16_MAX;
9367	}
9368
9369	uint64_t u64EffAddr;
9370
9371	/* Handle the rip+disp32 form with no registers first. */
9372	if ((bRm & (X86_MODRM_MOD_MASK \| X86_MODRM_RM_MASK)) == 5)
9373	{
9374	IEM_OPCODE_GET_NEXT_S32_SX_U64(&u64EffAddr);
9375	u64EffAddr += pVCpu->cpum.GstCtx.rip + IEM_GET_INSTR_LEN(pVCpu) + cbImm;
9376	}
9377	else
9378	{
9379	/* Get the register (or SIB) value. */
9380	switch ((bRm & X86_MODRM_RM_MASK) \| pVCpu->iem.s.uRexB)
9381	{
9382	case 0: u64EffAddr = pVCpu->cpum.GstCtx.rax; break;
9383	case 1: u64EffAddr = pVCpu->cpum.GstCtx.rcx; break;
9384	case 2: u64EffAddr = pVCpu->cpum.GstCtx.rdx; break;
9385	case 3: u64EffAddr = pVCpu->cpum.GstCtx.rbx; break;
9386	case 5: u64EffAddr = pVCpu->cpum.GstCtx.rbp; SET_SS_DEF(); break;
9387	case 6: u64EffAddr = pVCpu->cpum.GstCtx.rsi; break;
9388	case 7: u64EffAddr = pVCpu->cpum.GstCtx.rdi; break;
9389	case 8: u64EffAddr = pVCpu->cpum.GstCtx.r8; break;
9390	case 9: u64EffAddr = pVCpu->cpum.GstCtx.r9; break;
9391	case 10: u64EffAddr = pVCpu->cpum.GstCtx.r10; break;
9392	case 11: u64EffAddr = pVCpu->cpum.GstCtx.r11; break;
9393	case 13: u64EffAddr = pVCpu->cpum.GstCtx.r13; break;
9394	case 14: u64EffAddr = pVCpu->cpum.GstCtx.r14; break;
9395	case 15: u64EffAddr = pVCpu->cpum.GstCtx.r15; break;
9396	/* SIB */
9397	case 4:
9398	case 12:
9399	{
9400	uint8_t bSib; IEM_OPCODE_GET_NEXT_U8(&bSib);
9401
9402	/* Get the index and scale it. */
9403	switch (((bSib >> X86_SIB_INDEX_SHIFT) & X86_SIB_INDEX_SMASK) \| pVCpu->iem.s.uRexIndex)
9404	{
9405	case 0: u64EffAddr = pVCpu->cpum.GstCtx.rax; break;
9406	case 1: u64EffAddr = pVCpu->cpum.GstCtx.rcx; break;
9407	case 2: u64EffAddr = pVCpu->cpum.GstCtx.rdx; break;
9408	case 3: u64EffAddr = pVCpu->cpum.GstCtx.rbx; break;
9409	case 4: u64EffAddr = 0; /none / break;
9410	case 5: u64EffAddr = pVCpu->cpum.GstCtx.rbp; break;
9411	case 6: u64EffAddr = pVCpu->cpum.GstCtx.rsi; break;
9412	case 7: u64EffAddr = pVCpu->cpum.GstCtx.rdi; break;
9413	case 8: u64EffAddr = pVCpu->cpum.GstCtx.r8; break;
9414	case 9: u64EffAddr = pVCpu->cpum.GstCtx.r9; break;
9415	case 10: u64EffAddr = pVCpu->cpum.GstCtx.r10; break;
9416	case 11: u64EffAddr = pVCpu->cpum.GstCtx.r11; break;
9417	case 12: u64EffAddr = pVCpu->cpum.GstCtx.r12; break;
9418	case 13: u64EffAddr = pVCpu->cpum.GstCtx.r13; break;
9419	case 14: u64EffAddr = pVCpu->cpum.GstCtx.r14; break;
9420	case 15: u64EffAddr = pVCpu->cpum.GstCtx.r15; break;
9421	IEM_NOT_REACHED_DEFAULT_CASE_RET2(RTGCPTR_MAX);
9422	}
9423	u64EffAddr <<= (bSib >> X86_SIB_SCALE_SHIFT) & X86_SIB_SCALE_SMASK;
9424
9425	/* add base */
9426	switch ((bSib & X86_SIB_BASE_MASK) \| pVCpu->iem.s.uRexB)
9427	{
9428	case 0: u64EffAddr += pVCpu->cpum.GstCtx.rax; break;
9429	case 1: u64EffAddr += pVCpu->cpum.GstCtx.rcx; break;
9430	case 2: u64EffAddr += pVCpu->cpum.GstCtx.rdx; break;
9431	case 3: u64EffAddr += pVCpu->cpum.GstCtx.rbx; break;
9432	case 4: u64EffAddr += pVCpu->cpum.GstCtx.rsp; SET_SS_DEF(); break;
9433	case 6: u64EffAddr += pVCpu->cpum.GstCtx.rsi; break;
9434	case 7: u64EffAddr += pVCpu->cpum.GstCtx.rdi; break;
9435	case 8: u64EffAddr += pVCpu->cpum.GstCtx.r8; break;
9436	case 9: u64EffAddr += pVCpu->cpum.GstCtx.r9; break;
9437	case 10: u64EffAddr += pVCpu->cpum.GstCtx.r10; break;
9438	case 11: u64EffAddr += pVCpu->cpum.GstCtx.r11; break;
9439	case 12: u64EffAddr += pVCpu->cpum.GstCtx.r12; break;
9440	case 14: u64EffAddr += pVCpu->cpum.GstCtx.r14; break;
9441	case 15: u64EffAddr += pVCpu->cpum.GstCtx.r15; break;
9442	/* complicated encodings */
9443	case 5:
9444	case 13:
9445	if ((bRm & X86_MODRM_MOD_MASK) != 0)
9446	{
9447	if (!pVCpu->iem.s.uRexB)
9448	{
9449	u64EffAddr += pVCpu->cpum.GstCtx.rbp;
9450	SET_SS_DEF();
9451	}
9452	else
9453	u64EffAddr += pVCpu->cpum.GstCtx.r13;
9454	}
9455	else
9456	{
9457	uint32_t u32Disp;
9458	IEM_OPCODE_GET_NEXT_U32(&u32Disp);
9459	u64EffAddr += (int32_t)u32Disp;
9460	}
9461	break;
9462	IEM_NOT_REACHED_DEFAULT_CASE_RET2(RTGCPTR_MAX);
9463	}
9464	break;
9465	}
9466	IEM_NOT_REACHED_DEFAULT_CASE_RET2(RTGCPTR_MAX);
9467	}
9468
9469	/* Get and add the displacement. */
9470	switch ((bRm >> X86_MODRM_MOD_SHIFT) & X86_MODRM_MOD_SMASK)
9471	{
9472	case 0:
9473	break;
9474	case 1:
9475	{
9476	int8_t i8Disp;
9477	IEM_OPCODE_GET_NEXT_S8(&i8Disp);
9478	u64EffAddr += i8Disp;
9479	break;
9480	}
9481	case 2:
9482	{
9483	uint32_t u32Disp;
9484	IEM_OPCODE_GET_NEXT_U32(&u32Disp);
9485	u64EffAddr += (int32_t)u32Disp;
9486	break;
9487	}
9488	IEM_NOT_REACHED_DEFAULT_CASE_RET2(RTGCPTR_MAX); /* (caller checked for these) */
9489	}
9490
9491	}
9492
9493	if (pVCpu->iem.s.enmEffAddrMode == IEMMODE_64BIT)
9494	{
9495	Log5(("iemOpHlpCalcRmEffAddrJmp: EffAddr=%#010RGv\n", u64EffAddr));
9496	return u64EffAddr;
9497	}
9498	Assert(pVCpu->iem.s.enmEffAddrMode == IEMMODE_32BIT);
9499	Log5(("iemOpHlpCalcRmEffAddrJmp: EffAddr=%#010RGv\n", u64EffAddr & UINT32_MAX));
9500	return u64EffAddr & UINT32_MAX;
9501	}
9502	#endif /* IEM_WITH_SETJMP */
9503
9504	/** @} */
9505
9506
9507	#ifdef LOG_ENABLED
9508	/**
9509	* Logs the current instruction.
9510	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
9511	* @param fSameCtx Set if we have the same context information as the VMM,
9512	* clear if we may have already executed an instruction in
9513	* our debug context. When clear, we assume IEMCPU holds
9514	* valid CPU mode info.
9515	*
9516	* The @a fSameCtx parameter is now misleading and obsolete.
9517	* @param pszFunction The IEM function doing the execution.
9518	*/
9519	static void iemLogCurInstr(PVMCPUCC pVCpu, bool fSameCtx, const char *pszFunction) RT_NOEXCEPT
9520	{
9521	# ifdef IN_RING3
9522	if (LogIs2Enabled())
9523	{
9524	char szInstr[256];
9525	uint32_t cbInstr = 0;
9526	if (fSameCtx)
9527	DBGFR3DisasInstrEx(pVCpu->pVMR3->pUVM, pVCpu->idCpu, 0, 0,
9528	DBGF_DISAS_FLAGS_CURRENT_GUEST \| DBGF_DISAS_FLAGS_DEFAULT_MODE,
9529	szInstr, sizeof(szInstr), &cbInstr);
9530	else
9531	{
9532	uint32_t fFlags = 0;
9533	switch (pVCpu->iem.s.enmCpuMode)
9534	{
9535	case IEMMODE_64BIT: fFlags \|= DBGF_DISAS_FLAGS_64BIT_MODE; break;
9536	case IEMMODE_32BIT: fFlags \|= DBGF_DISAS_FLAGS_32BIT_MODE; break;
9537	case IEMMODE_16BIT:
9538	if (!(pVCpu->cpum.GstCtx.cr0 & X86_CR0_PE) \|\| pVCpu->cpum.GstCtx.eflags.Bits.u1VM)
9539	fFlags \|= DBGF_DISAS_FLAGS_16BIT_REAL_MODE;
9540	else
9541	fFlags \|= DBGF_DISAS_FLAGS_16BIT_MODE;
9542	break;
9543	}
9544	DBGFR3DisasInstrEx(pVCpu->pVMR3->pUVM, pVCpu->idCpu, pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, fFlags,
9545	szInstr, sizeof(szInstr), &cbInstr);
9546	}
9547
9548	PCX86FXSTATE pFpuCtx = &pVCpu->cpum.GstCtx.XState.x87;
9549	Log2(("**** %s\n"
9550	" eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n"
9551	" eip=%08x esp=%08x ebp=%08x iopl=%d tr=%04x\n"
9552	" cs=%04x ss=%04x ds=%04x es=%04x fs=%04x gs=%04x efl=%08x\n"
9553	" fsw=%04x fcw=%04x ftw=%02x mxcsr=%04x/%04x\n"
9554	" %s\n"
9555	, pszFunction,
9556	pVCpu->cpum.GstCtx.eax, pVCpu->cpum.GstCtx.ebx, pVCpu->cpum.GstCtx.ecx, pVCpu->cpum.GstCtx.edx, pVCpu->cpum.GstCtx.esi, pVCpu->cpum.GstCtx.edi,
9557	pVCpu->cpum.GstCtx.eip, pVCpu->cpum.GstCtx.esp, pVCpu->cpum.GstCtx.ebp, pVCpu->cpum.GstCtx.eflags.Bits.u2IOPL, pVCpu->cpum.GstCtx.tr.Sel,
9558	pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.ss.Sel, pVCpu->cpum.GstCtx.ds.Sel, pVCpu->cpum.GstCtx.es.Sel,
9559	pVCpu->cpum.GstCtx.fs.Sel, pVCpu->cpum.GstCtx.gs.Sel, pVCpu->cpum.GstCtx.eflags.u,
9560	pFpuCtx->FSW, pFpuCtx->FCW, pFpuCtx->FTW, pFpuCtx->MXCSR, pFpuCtx->MXCSR_MASK,
9561	szInstr));
9562
9563	if (LogIs3Enabled())
9564	DBGFR3InfoEx(pVCpu->pVMR3->pUVM, pVCpu->idCpu, "cpumguest", "verbose", NULL);
9565	}
9566	else
9567	# endif
9568	LogFlow(("%s: cs:rip=%04x:%08RX64 ss:rsp=%04x:%08RX64 EFL=%06x\n", pszFunction, pVCpu->cpum.GstCtx.cs.Sel,
9569	pVCpu->cpum.GstCtx.rip, pVCpu->cpum.GstCtx.ss.Sel, pVCpu->cpum.GstCtx.rsp, pVCpu->cpum.GstCtx.eflags.u));
9570	RT_NOREF_PV(pVCpu); RT_NOREF_PV(fSameCtx);
9571	}
9572	#endif /* LOG_ENABLED */
9573
9574
9575	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX
9576	/**
9577	* Deals with VMCPU_FF_VMX_APIC_WRITE, VMCPU_FF_VMX_MTF, VMCPU_FF_VMX_NMI_WINDOW,
9578	* VMCPU_FF_VMX_PREEMPT_TIMER and VMCPU_FF_VMX_INT_WINDOW.
9579	*
9580	* @returns Modified rcStrict.
9581	* @param pVCpu The cross context virtual CPU structure of the calling thread.
9582	* @param rcStrict The instruction execution status.
9583	*/
9584	static VBOXSTRICTRC iemHandleNestedInstructionBoundaryFFs(PVMCPUCC pVCpu, VBOXSTRICTRC rcStrict) RT_NOEXCEPT
9585	{
9586	Assert(CPUMIsGuestInVmxNonRootMode(IEM_GET_CTX(pVCpu)));
9587	if (!VMCPU_FF_IS_ANY_SET(pVCpu, VMCPU_FF_VMX_APIC_WRITE \| VMCPU_FF_VMX_MTF))
9588	{
9589	/* VMX preemption timer takes priority over NMI-window exits. */
9590	if (VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_VMX_PREEMPT_TIMER))
9591	{
9592	rcStrict = iemVmxVmexitPreemptTimer(pVCpu);
9593	Assert(!VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_VMX_PREEMPT_TIMER));
9594	}
9595	/*
9596	* Check remaining intercepts.
9597	*
9598	* NMI-window and Interrupt-window VM-exits.
9599	* Interrupt shadow (block-by-STI and Mov SS) inhibits interrupts and may also block NMIs.
9600	* Event injection during VM-entry takes priority over NMI-window and interrupt-window VM-exits.
9601	*
9602	* See Intel spec. 26.7.6 "NMI-Window Exiting".
9603	* See Intel spec. 26.7.5 "Interrupt-Window Exiting and Virtual-Interrupt Delivery".
9604	*/
9605	else if ( VMCPU_FF_IS_ANY_SET(pVCpu, VMCPU_FF_VMX_NMI_WINDOW \| VMCPU_FF_VMX_INT_WINDOW)
9606	&& !VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_INHIBIT_INTERRUPTS)
9607	&& !TRPMHasTrap(pVCpu))
9608	{
9609	Assert(CPUMIsGuestVmxInterceptEvents(&pVCpu->cpum.GstCtx));
9610	if ( VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_VMX_NMI_WINDOW)
9611	&& CPUMIsGuestVmxVirtNmiBlocking(&pVCpu->cpum.GstCtx))
9612	{
9613	rcStrict = iemVmxVmexit(pVCpu, VMX_EXIT_NMI_WINDOW, 0 /* u64ExitQual */);
9614	Assert(!VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_VMX_NMI_WINDOW));
9615	}
9616	else if ( VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_VMX_INT_WINDOW)
9617	&& CPUMIsGuestVmxVirtIntrEnabled(&pVCpu->cpum.GstCtx))
9618	{
9619	rcStrict = iemVmxVmexit(pVCpu, VMX_EXIT_INT_WINDOW, 0 /* u64ExitQual */);
9620	Assert(!VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_VMX_INT_WINDOW));
9621	}
9622	}
9623	}
9624	/* TPR-below threshold/APIC write has the highest priority. */
9625	else if (VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_VMX_APIC_WRITE))
9626	{
9627	rcStrict = iemVmxApicWriteEmulation(pVCpu);
9628	Assert(!VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_INHIBIT_INTERRUPTS));
9629	Assert(!VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_VMX_APIC_WRITE));
9630	}
9631	/* MTF takes priority over VMX-preemption timer. */
9632	else
9633	{
9634	rcStrict = iemVmxVmexit(pVCpu, VMX_EXIT_MTF, 0 /* u64ExitQual */);
9635	Assert(!VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_INHIBIT_INTERRUPTS));
9636	Assert(!VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_VMX_MTF));
9637	}
9638	return rcStrict;
9639	}
9640	#endif /* VBOX_WITH_NESTED_HWVIRT_VMX */
9641
9642
9643	/**
9644	* The actual code execution bits of IEMExecOne, IEMExecOneEx, and
9645	* IEMExecOneWithPrefetchedByPC.
9646	*
9647	* Similar code is found in IEMExecLots.
9648	*
9649	* @return Strict VBox status code.
9650	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
9651	* @param fExecuteInhibit If set, execute the instruction following CLI,
9652	* POP SS and MOV SS,GR.
9653	* @param pszFunction The calling function name.
9654	*/
9655	DECLINLINE(VBOXSTRICTRC) iemExecOneInner(PVMCPUCC pVCpu, bool fExecuteInhibit, const char *pszFunction)
9656	{
9657	AssertMsg(pVCpu->iem.s.aMemMappings[0].fAccess == IEM_ACCESS_INVALID, ("0: %#x %RGp\n", pVCpu->iem.s.aMemMappings[0].fAccess, pVCpu->iem.s.aMemBbMappings[0].GCPhysFirst));
9658	AssertMsg(pVCpu->iem.s.aMemMappings[1].fAccess == IEM_ACCESS_INVALID, ("1: %#x %RGp\n", pVCpu->iem.s.aMemMappings[1].fAccess, pVCpu->iem.s.aMemBbMappings[1].GCPhysFirst));
9659	AssertMsg(pVCpu->iem.s.aMemMappings[2].fAccess == IEM_ACCESS_INVALID, ("2: %#x %RGp\n", pVCpu->iem.s.aMemMappings[2].fAccess, pVCpu->iem.s.aMemBbMappings[2].GCPhysFirst));
9660	RT_NOREF_PV(pszFunction);
9661
9662	#ifdef IEM_WITH_SETJMP
9663	VBOXSTRICTRC rcStrict;
9664	jmp_buf JmpBuf;
9665	jmp_buf *pSavedJmpBuf = pVCpu->iem.s.CTX_SUFF(pJmpBuf);
9666	pVCpu->iem.s.CTX_SUFF(pJmpBuf) = &JmpBuf;
9667	if ((rcStrict = setjmp(JmpBuf)) == 0)
9668	{
9669	uint8_t b; IEM_OPCODE_GET_NEXT_U8(&b);
9670	rcStrict = FNIEMOP_CALL(g_apfnOneByteMap[b]);
9671	}
9672	else
9673	pVCpu->iem.s.cLongJumps++;
9674	pVCpu->iem.s.CTX_SUFF(pJmpBuf) = pSavedJmpBuf;
9675	#else
9676	uint8_t b; IEM_OPCODE_GET_NEXT_U8(&b);
9677	VBOXSTRICTRC rcStrict = FNIEMOP_CALL(g_apfnOneByteMap[b]);
9678	#endif
9679	if (rcStrict == VINF_SUCCESS)
9680	pVCpu->iem.s.cInstructions++;
9681	if (pVCpu->iem.s.cActiveMappings > 0)
9682	{
9683	Assert(rcStrict != VINF_SUCCESS);
9684	iemMemRollback(pVCpu);
9685	}
9686	AssertMsg(pVCpu->iem.s.aMemMappings[0].fAccess == IEM_ACCESS_INVALID, ("0: %#x %RGp\n", pVCpu->iem.s.aMemMappings[0].fAccess, pVCpu->iem.s.aMemBbMappings[0].GCPhysFirst));
9687	AssertMsg(pVCpu->iem.s.aMemMappings[1].fAccess == IEM_ACCESS_INVALID, ("1: %#x %RGp\n", pVCpu->iem.s.aMemMappings[1].fAccess, pVCpu->iem.s.aMemBbMappings[1].GCPhysFirst));
9688	AssertMsg(pVCpu->iem.s.aMemMappings[2].fAccess == IEM_ACCESS_INVALID, ("2: %#x %RGp\n", pVCpu->iem.s.aMemMappings[2].fAccess, pVCpu->iem.s.aMemBbMappings[2].GCPhysFirst));
9689
9690	//#ifdef DEBUG
9691	// AssertMsg(IEM_GET_INSTR_LEN(pVCpu) == cbInstr \|\| rcStrict != VINF_SUCCESS, ("%u %u\n", IEM_GET_INSTR_LEN(pVCpu), cbInstr));
9692	//#endif
9693
9694	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX
9695	/*
9696	* Perform any VMX nested-guest instruction boundary actions.
9697	*
9698	* If any of these causes a VM-exit, we must skip executing the next
9699	* instruction (would run into stale page tables). A VM-exit makes sure
9700	* there is no interrupt-inhibition, so that should ensure we don't go
9701	* to try execute the next instruction. Clearing fExecuteInhibit is
9702	* problematic because of the setjmp/longjmp clobbering above.
9703	*/
9704	if ( !VMCPU_FF_IS_ANY_SET(pVCpu, VMCPU_FF_VMX_APIC_WRITE \| VMCPU_FF_VMX_MTF \| VMCPU_FF_VMX_PREEMPT_TIMER
9705	\| VMCPU_FF_VMX_INT_WINDOW \| VMCPU_FF_VMX_NMI_WINDOW)
9706	\|\| rcStrict != VINF_SUCCESS)
9707	{ /* likely */ }
9708	else
9709	rcStrict = iemHandleNestedInstructionBoundaryFFs(pVCpu, rcStrict);
9710	#endif
9711
9712	/* Execute the next instruction as well if a cli, pop ss or
9713	mov ss, Gr has just completed successfully. */
9714	if ( fExecuteInhibit
9715	&& rcStrict == VINF_SUCCESS
9716	&& VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_INHIBIT_INTERRUPTS)
9717	&& EMIsInhibitInterruptsActive(pVCpu))
9718	{
9719	rcStrict = iemInitDecoderAndPrefetchOpcodes(pVCpu, pVCpu->iem.s.fBypassHandlers, pVCpu->iem.s.fDisregardLock);
9720	if (rcStrict == VINF_SUCCESS)
9721	{
9722	#ifdef LOG_ENABLED
9723	iemLogCurInstr(pVCpu, false, pszFunction);
9724	#endif
9725	#ifdef IEM_WITH_SETJMP
9726	pVCpu->iem.s.CTX_SUFF(pJmpBuf) = &JmpBuf;
9727	if ((rcStrict = setjmp(JmpBuf)) == 0)
9728	{
9729	uint8_t b; IEM_OPCODE_GET_NEXT_U8(&b);
9730	rcStrict = FNIEMOP_CALL(g_apfnOneByteMap[b]);
9731	}
9732	else
9733	pVCpu->iem.s.cLongJumps++;
9734	pVCpu->iem.s.CTX_SUFF(pJmpBuf) = pSavedJmpBuf;
9735	#else
9736	IEM_OPCODE_GET_NEXT_U8(&b);
9737	rcStrict = FNIEMOP_CALL(g_apfnOneByteMap[b]);
9738	#endif
9739	if (rcStrict == VINF_SUCCESS)
9740	{
9741	pVCpu->iem.s.cInstructions++;
9742	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX
9743	if (!VMCPU_FF_IS_ANY_SET(pVCpu, VMCPU_FF_VMX_APIC_WRITE \| VMCPU_FF_VMX_MTF \| VMCPU_FF_VMX_PREEMPT_TIMER
9744	\| VMCPU_FF_VMX_INT_WINDOW \| VMCPU_FF_VMX_NMI_WINDOW))
9745	{ /* likely */ }
9746	else
9747	rcStrict = iemHandleNestedInstructionBoundaryFFs(pVCpu, rcStrict);
9748	#endif
9749	}
9750	if (pVCpu->iem.s.cActiveMappings > 0)
9751	{
9752	Assert(rcStrict != VINF_SUCCESS);
9753	iemMemRollback(pVCpu);
9754	}
9755	AssertMsg(pVCpu->iem.s.aMemMappings[0].fAccess == IEM_ACCESS_INVALID, ("0: %#x %RGp\n", pVCpu->iem.s.aMemMappings[0].fAccess, pVCpu->iem.s.aMemBbMappings[0].GCPhysFirst));
9756	AssertMsg(pVCpu->iem.s.aMemMappings[1].fAccess == IEM_ACCESS_INVALID, ("1: %#x %RGp\n", pVCpu->iem.s.aMemMappings[1].fAccess, pVCpu->iem.s.aMemBbMappings[1].GCPhysFirst));
9757	AssertMsg(pVCpu->iem.s.aMemMappings[2].fAccess == IEM_ACCESS_INVALID, ("2: %#x %RGp\n", pVCpu->iem.s.aMemMappings[2].fAccess, pVCpu->iem.s.aMemBbMappings[2].GCPhysFirst));
9758	}
9759	else if (pVCpu->iem.s.cActiveMappings > 0)
9760	iemMemRollback(pVCpu);
9761	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_INHIBIT_INTERRUPTS); /* hope this is correct for all exceptional cases... */
9762	}
9763
9764	/*
9765	* Return value fiddling, statistics and sanity assertions.
9766	*/
9767	rcStrict = iemExecStatusCodeFiddling(pVCpu, rcStrict);
9768
9769	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.cs));
9770	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.ss));
9771	return rcStrict;
9772	}
9773
9774
9775	/**
9776	* Execute one instruction.
9777	*
9778	* @return Strict VBox status code.
9779	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
9780	*/
9781	VMMDECL(VBOXSTRICTRC) IEMExecOne(PVMCPUCC pVCpu)
9782	{
9783	AssertCompile(sizeof(pVCpu->iem.s) <= sizeof(pVCpu->iem.padding)); /* (tstVMStruct can't do it's job w/o instruction stats) */
9784	#ifdef LOG_ENABLED
9785	iemLogCurInstr(pVCpu, true, "IEMExecOne");
9786	#endif
9787
9788	/*
9789	* Do the decoding and emulation.
9790	*/
9791	VBOXSTRICTRC rcStrict = iemInitDecoderAndPrefetchOpcodes(pVCpu, false, false);
9792	if (rcStrict == VINF_SUCCESS)
9793	rcStrict = iemExecOneInner(pVCpu, true, "IEMExecOne");
9794	else if (pVCpu->iem.s.cActiveMappings > 0)
9795	iemMemRollback(pVCpu);
9796
9797	if (rcStrict != VINF_SUCCESS)
9798	LogFlow(("IEMExecOne: cs:rip=%04x:%08RX64 ss:rsp=%04x:%08RX64 EFL=%06x - rcStrict=%Rrc\n",
9799	pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, pVCpu->cpum.GstCtx.ss.Sel, pVCpu->cpum.GstCtx.rsp, pVCpu->cpum.GstCtx.eflags.u, VBOXSTRICTRC_VAL(rcStrict)));
9800	return rcStrict;
9801	}
9802
9803
9804	VMMDECL(VBOXSTRICTRC) IEMExecOneEx(PVMCPUCC pVCpu, PCPUMCTXCORE pCtxCore, uint32_t *pcbWritten)
9805	{
9806	AssertReturn(CPUMCTX2CORE(IEM_GET_CTX(pVCpu)) == pCtxCore, VERR_IEM_IPE_3);
9807
9808	uint32_t const cbOldWritten = pVCpu->iem.s.cbWritten;
9809	VBOXSTRICTRC rcStrict = iemInitDecoderAndPrefetchOpcodes(pVCpu, false, false);
9810	if (rcStrict == VINF_SUCCESS)
9811	{
9812	rcStrict = iemExecOneInner(pVCpu, true, "IEMExecOneEx");
9813	if (pcbWritten)
9814	*pcbWritten = pVCpu->iem.s.cbWritten - cbOldWritten;
9815	}
9816	else if (pVCpu->iem.s.cActiveMappings > 0)
9817	iemMemRollback(pVCpu);
9818
9819	return rcStrict;
9820	}
9821
9822
9823	VMMDECL(VBOXSTRICTRC) IEMExecOneWithPrefetchedByPC(PVMCPUCC pVCpu, PCPUMCTXCORE pCtxCore, uint64_t OpcodeBytesPC,
9824	const void *pvOpcodeBytes, size_t cbOpcodeBytes)
9825	{
9826	AssertReturn(CPUMCTX2CORE(IEM_GET_CTX(pVCpu)) == pCtxCore, VERR_IEM_IPE_3);
9827
9828	VBOXSTRICTRC rcStrict;
9829	if ( cbOpcodeBytes
9830	&& pVCpu->cpum.GstCtx.rip == OpcodeBytesPC)
9831	{
9832	iemInitDecoder(pVCpu, false, false);
9833	#ifdef IEM_WITH_CODE_TLB
9834	pVCpu->iem.s.uInstrBufPc = OpcodeBytesPC;
9835	pVCpu->iem.s.pbInstrBuf = (uint8_t const *)pvOpcodeBytes;
9836	pVCpu->iem.s.cbInstrBufTotal = (uint16_t)RT_MIN(X86_PAGE_SIZE, cbOpcodeBytes);
9837	pVCpu->iem.s.offCurInstrStart = 0;
9838	pVCpu->iem.s.offInstrNextByte = 0;
9839	#else
9840	pVCpu->iem.s.cbOpcode = (uint8_t)RT_MIN(cbOpcodeBytes, sizeof(pVCpu->iem.s.abOpcode));
9841	memcpy(pVCpu->iem.s.abOpcode, pvOpcodeBytes, pVCpu->iem.s.cbOpcode);
9842	#endif
9843	rcStrict = VINF_SUCCESS;
9844	}
9845	else
9846	rcStrict = iemInitDecoderAndPrefetchOpcodes(pVCpu, false, false);
9847	if (rcStrict == VINF_SUCCESS)
9848	rcStrict = iemExecOneInner(pVCpu, true, "IEMExecOneWithPrefetchedByPC");
9849	else if (pVCpu->iem.s.cActiveMappings > 0)
9850	iemMemRollback(pVCpu);
9851
9852	return rcStrict;
9853	}
9854
9855
9856	VMMDECL(VBOXSTRICTRC) IEMExecOneBypassEx(PVMCPUCC pVCpu, PCPUMCTXCORE pCtxCore, uint32_t *pcbWritten)
9857	{
9858	AssertReturn(CPUMCTX2CORE(IEM_GET_CTX(pVCpu)) == pCtxCore, VERR_IEM_IPE_3);
9859
9860	uint32_t const cbOldWritten = pVCpu->iem.s.cbWritten;
9861	VBOXSTRICTRC rcStrict = iemInitDecoderAndPrefetchOpcodes(pVCpu, true, false);
9862	if (rcStrict == VINF_SUCCESS)
9863	{
9864	rcStrict = iemExecOneInner(pVCpu, false, "IEMExecOneBypassEx");
9865	if (pcbWritten)
9866	*pcbWritten = pVCpu->iem.s.cbWritten - cbOldWritten;
9867	}
9868	else if (pVCpu->iem.s.cActiveMappings > 0)
9869	iemMemRollback(pVCpu);
9870
9871	return rcStrict;
9872	}
9873
9874
9875	VMMDECL(VBOXSTRICTRC) IEMExecOneBypassWithPrefetchedByPC(PVMCPUCC pVCpu, PCPUMCTXCORE pCtxCore, uint64_t OpcodeBytesPC,
9876	const void *pvOpcodeBytes, size_t cbOpcodeBytes)
9877	{
9878	AssertReturn(CPUMCTX2CORE(IEM_GET_CTX(pVCpu)) == pCtxCore, VERR_IEM_IPE_3);
9879
9880	VBOXSTRICTRC rcStrict;
9881	if ( cbOpcodeBytes
9882	&& pVCpu->cpum.GstCtx.rip == OpcodeBytesPC)
9883	{
9884	iemInitDecoder(pVCpu, true, false);
9885	#ifdef IEM_WITH_CODE_TLB
9886	pVCpu->iem.s.uInstrBufPc = OpcodeBytesPC;
9887	pVCpu->iem.s.pbInstrBuf = (uint8_t const *)pvOpcodeBytes;
9888	pVCpu->iem.s.cbInstrBufTotal = (uint16_t)RT_MIN(X86_PAGE_SIZE, cbOpcodeBytes);
9889	pVCpu->iem.s.offCurInstrStart = 0;
9890	pVCpu->iem.s.offInstrNextByte = 0;
9891	#else
9892	pVCpu->iem.s.cbOpcode = (uint8_t)RT_MIN(cbOpcodeBytes, sizeof(pVCpu->iem.s.abOpcode));
9893	memcpy(pVCpu->iem.s.abOpcode, pvOpcodeBytes, pVCpu->iem.s.cbOpcode);
9894	#endif
9895	rcStrict = VINF_SUCCESS;
9896	}
9897	else
9898	rcStrict = iemInitDecoderAndPrefetchOpcodes(pVCpu, true, false);
9899	if (rcStrict == VINF_SUCCESS)
9900	rcStrict = iemExecOneInner(pVCpu, false, "IEMExecOneBypassWithPrefetchedByPC");
9901	else if (pVCpu->iem.s.cActiveMappings > 0)
9902	iemMemRollback(pVCpu);
9903
9904	return rcStrict;
9905	}
9906
9907
9908	/**
9909	* For debugging DISGetParamSize, may come in handy.
9910	*
9911	* @returns Strict VBox status code.
9912	* @param pVCpu The cross context virtual CPU structure of the
9913	* calling EMT.
9914	* @param pCtxCore The context core structure.
9915	* @param OpcodeBytesPC The PC of the opcode bytes.
9916	* @param pvOpcodeBytes Prefeched opcode bytes.
9917	* @param cbOpcodeBytes Number of prefetched bytes.
9918	* @param pcbWritten Where to return the number of bytes written.
9919	* Optional.
9920	*/
9921	VMMDECL(VBOXSTRICTRC) IEMExecOneBypassWithPrefetchedByPCWritten(PVMCPUCC pVCpu, PCPUMCTXCORE pCtxCore, uint64_t OpcodeBytesPC,
9922	const void *pvOpcodeBytes, size_t cbOpcodeBytes,
9923	uint32_t *pcbWritten)
9924	{
9925	AssertReturn(CPUMCTX2CORE(IEM_GET_CTX(pVCpu)) == pCtxCore, VERR_IEM_IPE_3);
9926
9927	uint32_t const cbOldWritten = pVCpu->iem.s.cbWritten;
9928	VBOXSTRICTRC rcStrict;
9929	if ( cbOpcodeBytes
9930	&& pVCpu->cpum.GstCtx.rip == OpcodeBytesPC)
9931	{
9932	iemInitDecoder(pVCpu, true, false);
9933	#ifdef IEM_WITH_CODE_TLB
9934	pVCpu->iem.s.uInstrBufPc = OpcodeBytesPC;
9935	pVCpu->iem.s.pbInstrBuf = (uint8_t const *)pvOpcodeBytes;
9936	pVCpu->iem.s.cbInstrBufTotal = (uint16_t)RT_MIN(X86_PAGE_SIZE, cbOpcodeBytes);
9937	pVCpu->iem.s.offCurInstrStart = 0;
9938	pVCpu->iem.s.offInstrNextByte = 0;
9939	#else
9940	pVCpu->iem.s.cbOpcode = (uint8_t)RT_MIN(cbOpcodeBytes, sizeof(pVCpu->iem.s.abOpcode));
9941	memcpy(pVCpu->iem.s.abOpcode, pvOpcodeBytes, pVCpu->iem.s.cbOpcode);
9942	#endif
9943	rcStrict = VINF_SUCCESS;
9944	}
9945	else
9946	rcStrict = iemInitDecoderAndPrefetchOpcodes(pVCpu, true, false);
9947	if (rcStrict == VINF_SUCCESS)
9948	{
9949	rcStrict = iemExecOneInner(pVCpu, false, "IEMExecOneBypassWithPrefetchedByPCWritten");
9950	if (pcbWritten)
9951	*pcbWritten = pVCpu->iem.s.cbWritten - cbOldWritten;
9952	}
9953	else if (pVCpu->iem.s.cActiveMappings > 0)
9954	iemMemRollback(pVCpu);
9955
9956	return rcStrict;
9957	}
9958
9959
9960	/**
9961	* For handling split cacheline lock operations when the host has split-lock
9962	* detection enabled.
9963	*
9964	* This will cause the interpreter to disregard the lock prefix and implicit
9965	* locking (xchg).
9966	*
9967	* @returns Strict VBox status code.
9968	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
9969	*/
9970	VMMDECL(VBOXSTRICTRC) IEMExecOneIgnoreLock(PVMCPUCC pVCpu)
9971	{
9972	/*
9973	* Do the decoding and emulation.
9974	*/
9975	VBOXSTRICTRC rcStrict = iemInitDecoderAndPrefetchOpcodes(pVCpu, false, true /fDisregardLock/);
9976	if (rcStrict == VINF_SUCCESS)
9977	rcStrict = iemExecOneInner(pVCpu, true, "IEMExecOneIgnoreLock");
9978	else if (pVCpu->iem.s.cActiveMappings > 0)
9979	iemMemRollback(pVCpu);
9980
9981	if (rcStrict != VINF_SUCCESS)
9982	LogFlow(("IEMExecOneIgnoreLock: cs:rip=%04x:%08RX64 ss:rsp=%04x:%08RX64 EFL=%06x - rcStrict=%Rrc\n",
9983	pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, pVCpu->cpum.GstCtx.ss.Sel, pVCpu->cpum.GstCtx.rsp, pVCpu->cpum.GstCtx.eflags.u, VBOXSTRICTRC_VAL(rcStrict)));
9984	return rcStrict;
9985	}
9986
9987
9988	VMMDECL(VBOXSTRICTRC) IEMExecLots(PVMCPUCC pVCpu, uint32_t cMaxInstructions, uint32_t cPollRate, uint32_t *pcInstructions)
9989	{
9990	uint32_t const cInstructionsAtStart = pVCpu->iem.s.cInstructions;
9991	AssertMsg(RT_IS_POWER_OF_TWO(cPollRate + 1), ("%#x\n", cPollRate));
9992
9993	/*
9994	* See if there is an interrupt pending in TRPM, inject it if we can.
9995	*/
9996	/** @todo Can we centralize this under CPUMCanInjectInterrupt()? */
9997	#if defined(VBOX_WITH_NESTED_HWVIRT_SVM) \|\| defined(VBOX_WITH_NESTED_HWVIRT_VMX)
9998	bool fIntrEnabled = CPUMGetGuestGif(&pVCpu->cpum.GstCtx);
9999	if (fIntrEnabled)
10000	{
10001	if (!CPUMIsGuestInNestedHwvirtMode(IEM_GET_CTX(pVCpu)))
10002	fIntrEnabled = pVCpu->cpum.GstCtx.eflags.Bits.u1IF;
10003	else if (CPUMIsGuestInVmxNonRootMode(IEM_GET_CTX(pVCpu)))
10004	fIntrEnabled = CPUMIsGuestVmxPhysIntrEnabled(IEM_GET_CTX(pVCpu));
10005	else
10006	{
10007	Assert(CPUMIsGuestInSvmNestedHwVirtMode(IEM_GET_CTX(pVCpu)));
10008	fIntrEnabled = CPUMIsGuestSvmPhysIntrEnabled(pVCpu, IEM_GET_CTX(pVCpu));
10009	}
10010	}
10011	#else
10012	bool fIntrEnabled = pVCpu->cpum.GstCtx.eflags.Bits.u1IF;
10013	#endif
10014
10015	/** @todo What if we are injecting an exception and not an interrupt? Is that
10016	* possible here? For now we assert it is indeed only an interrupt. */
10017	if ( fIntrEnabled
10018	&& TRPMHasTrap(pVCpu)
10019	&& EMGetInhibitInterruptsPC(pVCpu) != pVCpu->cpum.GstCtx.rip)
10020	{
10021	uint8_t u8TrapNo;
10022	TRPMEVENT enmType;
10023	uint32_t uErrCode;
10024	RTGCPTR uCr2;
10025	int rc2 = TRPMQueryTrapAll(pVCpu, &u8TrapNo, &enmType, &uErrCode, &uCr2, NULL /* pu8InstLen /, NULL / fIcebp */);
10026	AssertRC(rc2);
10027	Assert(enmType == TRPM_HARDWARE_INT);
10028	VBOXSTRICTRC rcStrict = IEMInjectTrap(pVCpu, u8TrapNo, enmType, (uint16_t)uErrCode, uCr2, 0 /* cbInstr */);
10029	TRPMResetTrap(pVCpu);
10030	#if defined(VBOX_WITH_NESTED_HWVIRT_SVM) \|\| defined(VBOX_WITH_NESTED_HWVIRT_VMX)
10031	/* Injecting an event may cause a VM-exit. */
10032	if ( rcStrict != VINF_SUCCESS
10033	&& rcStrict != VINF_IEM_RAISED_XCPT)
10034	return iemExecStatusCodeFiddling(pVCpu, rcStrict);
10035	#else
10036	NOREF(rcStrict);
10037	#endif
10038	}
10039
10040	/*
10041	* Initial decoder init w/ prefetch, then setup setjmp.
10042	*/
10043	VBOXSTRICTRC rcStrict = iemInitDecoderAndPrefetchOpcodes(pVCpu, false, false);
10044	if (rcStrict == VINF_SUCCESS)
10045	{
10046	#ifdef IEM_WITH_SETJMP
10047	jmp_buf JmpBuf;
10048	jmp_buf *pSavedJmpBuf = pVCpu->iem.s.CTX_SUFF(pJmpBuf);
10049	pVCpu->iem.s.CTX_SUFF(pJmpBuf) = &JmpBuf;
10050	pVCpu->iem.s.cActiveMappings = 0;
10051	if ((rcStrict = setjmp(JmpBuf)) == 0)
10052	#endif
10053	{
10054	/*
10055	* The run loop. We limit ourselves to 4096 instructions right now.
10056	*/
10057	uint32_t cMaxInstructionsGccStupidity = cMaxInstructions;
10058	PVMCC pVM = pVCpu->CTX_SUFF(pVM);
10059	for (;;)
10060	{
10061	/*
10062	* Log the state.
10063	*/
10064	#ifdef LOG_ENABLED
10065	iemLogCurInstr(pVCpu, true, "IEMExecLots");
10066	#endif
10067
10068	/*
10069	* Do the decoding and emulation.
10070	*/
10071	uint8_t b; IEM_OPCODE_GET_NEXT_U8(&b);
10072	rcStrict = FNIEMOP_CALL(g_apfnOneByteMap[b]);
10073	if (RT_LIKELY(rcStrict == VINF_SUCCESS))
10074	{
10075	Assert(pVCpu->iem.s.cActiveMappings == 0);
10076	pVCpu->iem.s.cInstructions++;
10077
10078	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX
10079	/* Perform any VMX nested-guest instruction boundary actions. */
10080	uint64_t fCpu = pVCpu->fLocalForcedActions;
10081	if (!(fCpu & ( VMCPU_FF_VMX_APIC_WRITE \| VMCPU_FF_VMX_MTF \| VMCPU_FF_VMX_PREEMPT_TIMER
10082	\| VMCPU_FF_VMX_INT_WINDOW \| VMCPU_FF_VMX_NMI_WINDOW)))
10083	{ /* likely */ }
10084	else
10085	{
10086	rcStrict = iemHandleNestedInstructionBoundaryFFs(pVCpu, rcStrict);
10087	if (RT_LIKELY(rcStrict == VINF_SUCCESS))
10088	fCpu = pVCpu->fLocalForcedActions;
10089	else
10090	{
10091	rcStrict = iemExecStatusCodeFiddling(pVCpu, rcStrict);
10092	break;
10093	}
10094	}
10095	#endif
10096	if (RT_LIKELY(pVCpu->iem.s.rcPassUp == VINF_SUCCESS))
10097	{
10098	#ifndef VBOX_WITH_NESTED_HWVIRT_VMX
10099	uint64_t fCpu = pVCpu->fLocalForcedActions;
10100	#endif
10101	fCpu &= VMCPU_FF_ALL_MASK & ~( VMCPU_FF_PGM_SYNC_CR3
10102	\| VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL
10103	\| VMCPU_FF_TLB_FLUSH
10104	\| VMCPU_FF_INHIBIT_INTERRUPTS
10105	\| VMCPU_FF_BLOCK_NMIS
10106	\| VMCPU_FF_UNHALT );
10107
10108	if (RT_LIKELY( ( !fCpu
10109	\|\| ( !(fCpu & ~(VMCPU_FF_INTERRUPT_APIC \| VMCPU_FF_INTERRUPT_PIC))
10110	&& !pVCpu->cpum.GstCtx.rflags.Bits.u1IF) )
10111	&& !VM_FF_IS_ANY_SET(pVM, VM_FF_ALL_MASK) ))
10112	{
10113	if (cMaxInstructionsGccStupidity-- > 0)
10114	{
10115	/* Poll timers every now an then according to the caller's specs. */
10116	if ( (cMaxInstructionsGccStupidity & cPollRate) != 0
10117	\|\| !TMTimerPollBool(pVM, pVCpu))
10118	{
10119	Assert(pVCpu->iem.s.cActiveMappings == 0);
10120	iemReInitDecoder(pVCpu);
10121	continue;
10122	}
10123	}
10124	}
10125	}
10126	Assert(pVCpu->iem.s.cActiveMappings == 0);
10127	}
10128	else if (pVCpu->iem.s.cActiveMappings > 0)
10129	iemMemRollback(pVCpu);
10130	rcStrict = iemExecStatusCodeFiddling(pVCpu, rcStrict);
10131	break;
10132	}
10133	}
10134	#ifdef IEM_WITH_SETJMP
10135	else
10136	{
10137	if (pVCpu->iem.s.cActiveMappings > 0)
10138	iemMemRollback(pVCpu);
10139	# if defined(VBOX_WITH_NESTED_HWVIRT_SVM) \|\| defined(VBOX_WITH_NESTED_HWVIRT_VMX)
10140	rcStrict = iemExecStatusCodeFiddling(pVCpu, rcStrict);
10141	# endif
10142	pVCpu->iem.s.cLongJumps++;
10143	}
10144	pVCpu->iem.s.CTX_SUFF(pJmpBuf) = pSavedJmpBuf;
10145	#endif
10146
10147	/*
10148	* Assert hidden register sanity (also done in iemInitDecoder and iemReInitDecoder).
10149	*/
10150	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.cs));
10151	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.ss));
10152	}
10153	else
10154	{
10155	if (pVCpu->iem.s.cActiveMappings > 0)
10156	iemMemRollback(pVCpu);
10157
10158	#if defined(VBOX_WITH_NESTED_HWVIRT_SVM) \|\| defined(VBOX_WITH_NESTED_HWVIRT_VMX)
10159	/*
10160	* When a nested-guest causes an exception intercept (e.g. #PF) when fetching
10161	* code as part of instruction execution, we need this to fix-up VINF_SVM_VMEXIT.
10162	*/
10163	rcStrict = iemExecStatusCodeFiddling(pVCpu, rcStrict);
10164	#endif
10165	}
10166
10167	/*
10168	* Maybe re-enter raw-mode and log.
10169	*/
10170	if (rcStrict != VINF_SUCCESS)
10171	LogFlow(("IEMExecLots: cs:rip=%04x:%08RX64 ss:rsp=%04x:%08RX64 EFL=%06x - rcStrict=%Rrc\n",
10172	pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, pVCpu->cpum.GstCtx.ss.Sel, pVCpu->cpum.GstCtx.rsp, pVCpu->cpum.GstCtx.eflags.u, VBOXSTRICTRC_VAL(rcStrict)));
10173	if (pcInstructions)
10174	*pcInstructions = pVCpu->iem.s.cInstructions - cInstructionsAtStart;
10175	return rcStrict;
10176	}
10177
10178
10179	/**
10180	* Interface used by EMExecuteExec, does exit statistics and limits.
10181	*
10182	* @returns Strict VBox status code.
10183	* @param pVCpu The cross context virtual CPU structure.
10184	* @param fWillExit To be defined.
10185	* @param cMinInstructions Minimum number of instructions to execute before checking for FFs.
10186	* @param cMaxInstructions Maximum number of instructions to execute.
10187	* @param cMaxInstructionsWithoutExits
10188	* The max number of instructions without exits.
10189	* @param pStats Where to return statistics.
10190	*/
10191	VMMDECL(VBOXSTRICTRC) IEMExecForExits(PVMCPUCC pVCpu, uint32_t fWillExit, uint32_t cMinInstructions, uint32_t cMaxInstructions,
10192	uint32_t cMaxInstructionsWithoutExits, PIEMEXECFOREXITSTATS pStats)
10193	{
10194	NOREF(fWillExit); /** @todo define flexible exit crits */
10195
10196	/*
10197	* Initialize return stats.
10198	*/
10199	pStats->cInstructions = 0;
10200	pStats->cExits = 0;
10201	pStats->cMaxExitDistance = 0;
10202	pStats->cReserved = 0;
10203
10204	/*
10205	* Initial decoder init w/ prefetch, then setup setjmp.
10206	*/
10207	VBOXSTRICTRC rcStrict = iemInitDecoderAndPrefetchOpcodes(pVCpu, false, false);
10208	if (rcStrict == VINF_SUCCESS)
10209	{
10210	#ifdef IEM_WITH_SETJMP
10211	jmp_buf JmpBuf;
10212	jmp_buf *pSavedJmpBuf = pVCpu->iem.s.CTX_SUFF(pJmpBuf);
10213	pVCpu->iem.s.CTX_SUFF(pJmpBuf) = &JmpBuf;
10214	pVCpu->iem.s.cActiveMappings = 0;
10215	if ((rcStrict = setjmp(JmpBuf)) == 0)
10216	#endif
10217	{
10218	#ifdef IN_RING0
10219	bool const fCheckPreemptionPending = !RTThreadPreemptIsPossible() \|\| !RTThreadPreemptIsEnabled(NIL_RTTHREAD);
10220	#endif
10221	uint32_t cInstructionSinceLastExit = 0;
10222
10223	/*
10224	* The run loop. We limit ourselves to 4096 instructions right now.
10225	*/
10226	PVM pVM = pVCpu->CTX_SUFF(pVM);
10227	for (;;)
10228	{
10229	/*
10230	* Log the state.
10231	*/
10232	#ifdef LOG_ENABLED
10233	iemLogCurInstr(pVCpu, true, "IEMExecForExits");
10234	#endif
10235
10236	/*
10237	* Do the decoding and emulation.
10238	*/
10239	uint32_t const cPotentialExits = pVCpu->iem.s.cPotentialExits;
10240
10241	uint8_t b; IEM_OPCODE_GET_NEXT_U8(&b);
10242	rcStrict = FNIEMOP_CALL(g_apfnOneByteMap[b]);
10243
10244	if ( cPotentialExits != pVCpu->iem.s.cPotentialExits
10245	&& cInstructionSinceLastExit > 0 /* don't count the first */ )
10246	{
10247	pStats->cExits += 1;
10248	if (cInstructionSinceLastExit > pStats->cMaxExitDistance)
10249	pStats->cMaxExitDistance = cInstructionSinceLastExit;
10250	cInstructionSinceLastExit = 0;
10251	}
10252
10253	if (RT_LIKELY(rcStrict == VINF_SUCCESS))
10254	{
10255	Assert(pVCpu->iem.s.cActiveMappings == 0);
10256	pVCpu->iem.s.cInstructions++;
10257	pStats->cInstructions++;
10258	cInstructionSinceLastExit++;
10259
10260	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX
10261	/* Perform any VMX nested-guest instruction boundary actions. */
10262	uint64_t fCpu = pVCpu->fLocalForcedActions;
10263	if (!(fCpu & ( VMCPU_FF_VMX_APIC_WRITE \| VMCPU_FF_VMX_MTF \| VMCPU_FF_VMX_PREEMPT_TIMER
10264	\| VMCPU_FF_VMX_INT_WINDOW \| VMCPU_FF_VMX_NMI_WINDOW)))
10265	{ /* likely */ }
10266	else
10267	{
10268	rcStrict = iemHandleNestedInstructionBoundaryFFs(pVCpu, rcStrict);
10269	if (RT_LIKELY(rcStrict == VINF_SUCCESS))
10270	fCpu = pVCpu->fLocalForcedActions;
10271	else
10272	{
10273	rcStrict = iemExecStatusCodeFiddling(pVCpu, rcStrict);
10274	break;
10275	}
10276	}
10277	#endif
10278	if (RT_LIKELY(pVCpu->iem.s.rcPassUp == VINF_SUCCESS))
10279	{
10280	#ifndef VBOX_WITH_NESTED_HWVIRT_VMX
10281	uint64_t fCpu = pVCpu->fLocalForcedActions;
10282	#endif
10283	fCpu &= VMCPU_FF_ALL_MASK & ~( VMCPU_FF_PGM_SYNC_CR3
10284	\| VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL
10285	\| VMCPU_FF_TLB_FLUSH
10286	\| VMCPU_FF_INHIBIT_INTERRUPTS
10287	\| VMCPU_FF_BLOCK_NMIS
10288	\| VMCPU_FF_UNHALT );
10289	if (RT_LIKELY( ( ( !fCpu
10290	\|\| ( !(fCpu & ~(VMCPU_FF_INTERRUPT_APIC \| VMCPU_FF_INTERRUPT_PIC))
10291	&& !pVCpu->cpum.GstCtx.rflags.Bits.u1IF))
10292	&& !VM_FF_IS_ANY_SET(pVM, VM_FF_ALL_MASK) )
10293	\|\| pStats->cInstructions < cMinInstructions))
10294	{
10295	if (pStats->cInstructions < cMaxInstructions)
10296	{
10297	if (cInstructionSinceLastExit <= cMaxInstructionsWithoutExits)
10298	{
10299	#ifdef IN_RING0
10300	if ( !fCheckPreemptionPending
10301	\|\| !RTThreadPreemptIsPending(NIL_RTTHREAD))
10302	#endif
10303	{
10304	Assert(pVCpu->iem.s.cActiveMappings == 0);
10305	iemReInitDecoder(pVCpu);
10306	continue;
10307	}
10308	#ifdef IN_RING0
10309	rcStrict = VINF_EM_RAW_INTERRUPT;
10310	break;
10311	#endif
10312	}
10313	}
10314	}
10315	Assert(!(fCpu & VMCPU_FF_IEM));
10316	}
10317	Assert(pVCpu->iem.s.cActiveMappings == 0);
10318	}
10319	else if (pVCpu->iem.s.cActiveMappings > 0)
10320	iemMemRollback(pVCpu);
10321	rcStrict = iemExecStatusCodeFiddling(pVCpu, rcStrict);
10322	break;
10323	}
10324	}
10325	#ifdef IEM_WITH_SETJMP
10326	else
10327	{
10328	if (pVCpu->iem.s.cActiveMappings > 0)
10329	iemMemRollback(pVCpu);
10330	pVCpu->iem.s.cLongJumps++;
10331	}
10332	pVCpu->iem.s.CTX_SUFF(pJmpBuf) = pSavedJmpBuf;
10333	#endif
10334
10335	/*
10336	* Assert hidden register sanity (also done in iemInitDecoder and iemReInitDecoder).
10337	*/
10338	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.cs));
10339	Assert(CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, &pVCpu->cpum.GstCtx.ss));
10340	}
10341	else
10342	{
10343	if (pVCpu->iem.s.cActiveMappings > 0)
10344	iemMemRollback(pVCpu);
10345
10346	#if defined(VBOX_WITH_NESTED_HWVIRT_SVM) \|\| defined(VBOX_WITH_NESTED_HWVIRT_VMX)
10347	/*
10348	* When a nested-guest causes an exception intercept (e.g. #PF) when fetching
10349	* code as part of instruction execution, we need this to fix-up VINF_SVM_VMEXIT.
10350	*/
10351	rcStrict = iemExecStatusCodeFiddling(pVCpu, rcStrict);
10352	#endif
10353	}
10354
10355	/*
10356	* Maybe re-enter raw-mode and log.
10357	*/
10358	if (rcStrict != VINF_SUCCESS)
10359	LogFlow(("IEMExecForExits: cs:rip=%04x:%08RX64 ss:rsp=%04x:%08RX64 EFL=%06x - rcStrict=%Rrc; ins=%u exits=%u maxdist=%u\n",
10360	pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, pVCpu->cpum.GstCtx.ss.Sel, pVCpu->cpum.GstCtx.rsp,
10361	pVCpu->cpum.GstCtx.eflags.u, VBOXSTRICTRC_VAL(rcStrict), pStats->cInstructions, pStats->cExits, pStats->cMaxExitDistance));
10362	return rcStrict;
10363	}
10364
10365
10366	/**
10367	* Injects a trap, fault, abort, software interrupt or external interrupt.
10368	*
10369	* The parameter list matches TRPMQueryTrapAll pretty closely.
10370	*
10371	* @returns Strict VBox status code.
10372	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
10373	* @param u8TrapNo The trap number.
10374	* @param enmType What type is it (trap/fault/abort), software
10375	* interrupt or hardware interrupt.
10376	* @param uErrCode The error code if applicable.
10377	* @param uCr2 The CR2 value if applicable.
10378	* @param cbInstr The instruction length (only relevant for
10379	* software interrupts).
10380	*/
10381	VMM_INT_DECL(VBOXSTRICTRC) IEMInjectTrap(PVMCPUCC pVCpu, uint8_t u8TrapNo, TRPMEVENT enmType, uint16_t uErrCode, RTGCPTR uCr2,
10382	uint8_t cbInstr)
10383	{
10384	iemInitDecoder(pVCpu, false, false);
10385	#ifdef DBGFTRACE_ENABLED
10386	RTTraceBufAddMsgF(pVCpu->CTX_SUFF(pVM)->CTX_SUFF(hTraceBuf), "IEMInjectTrap: %x %d %x %llx",
10387	u8TrapNo, enmType, uErrCode, uCr2);
10388	#endif
10389
10390	uint32_t fFlags;
10391	switch (enmType)
10392	{
10393	case TRPM_HARDWARE_INT:
10394	Log(("IEMInjectTrap: %#4x ext\n", u8TrapNo));
10395	fFlags = IEM_XCPT_FLAGS_T_EXT_INT;
10396	uErrCode = uCr2 = 0;
10397	break;
10398
10399	case TRPM_SOFTWARE_INT:
10400	Log(("IEMInjectTrap: %#4x soft\n", u8TrapNo));
10401	fFlags = IEM_XCPT_FLAGS_T_SOFT_INT;
10402	uErrCode = uCr2 = 0;
10403	break;
10404
10405	case TRPM_TRAP:
10406	Log(("IEMInjectTrap: %#4x trap err=%#x cr2=%#RGv\n", u8TrapNo, uErrCode, uCr2));
10407	fFlags = IEM_XCPT_FLAGS_T_CPU_XCPT;
10408	if (u8TrapNo == X86_XCPT_PF)
10409	fFlags \|= IEM_XCPT_FLAGS_CR2;
10410	switch (u8TrapNo)
10411	{
10412	case X86_XCPT_DF:
10413	case X86_XCPT_TS:
10414	case X86_XCPT_NP:
10415	case X86_XCPT_SS:
10416	case X86_XCPT_PF:
10417	case X86_XCPT_AC:
10418	case X86_XCPT_GP:
10419	fFlags \|= IEM_XCPT_FLAGS_ERR;
10420	break;
10421	}
10422	break;
10423
10424	IEM_NOT_REACHED_DEFAULT_CASE_RET();
10425	}
10426
10427	VBOXSTRICTRC rcStrict = iemRaiseXcptOrInt(pVCpu, cbInstr, u8TrapNo, fFlags, uErrCode, uCr2);
10428
10429	if (pVCpu->iem.s.cActiveMappings > 0)
10430	iemMemRollback(pVCpu);
10431
10432	return rcStrict;
10433	}
10434
10435
10436	/**
10437	* Injects the active TRPM event.
10438	*
10439	* @returns Strict VBox status code.
10440	* @param pVCpu The cross context virtual CPU structure.
10441	*/
10442	VMMDECL(VBOXSTRICTRC) IEMInjectTrpmEvent(PVMCPUCC pVCpu)
10443	{
10444	#ifndef IEM_IMPLEMENTS_TASKSWITCH
10445	IEM_RETURN_ASPECT_NOT_IMPLEMENTED_LOG(("Event injection\n"));
10446	#else
10447	uint8_t u8TrapNo;
10448	TRPMEVENT enmType;
10449	uint32_t uErrCode;
10450	RTGCUINTPTR uCr2;
10451	uint8_t cbInstr;
10452	int rc = TRPMQueryTrapAll(pVCpu, &u8TrapNo, &enmType, &uErrCode, &uCr2, &cbInstr, NULL /* fIcebp */);
10453	if (RT_FAILURE(rc))
10454	return rc;
10455
10456	/** @todo r=ramshankar: Pass ICEBP info. to IEMInjectTrap() below and handle
10457	* ICEBP \#DB injection as a special case. */
10458	VBOXSTRICTRC rcStrict = IEMInjectTrap(pVCpu, u8TrapNo, enmType, uErrCode, uCr2, cbInstr);
10459	#ifdef VBOX_WITH_NESTED_HWVIRT_SVM
10460	if (rcStrict == VINF_SVM_VMEXIT)
10461	rcStrict = VINF_SUCCESS;
10462	#endif
10463	#ifdef VBOX_WITH_NESTED_HWVIRT_VMX
10464	if (rcStrict == VINF_VMX_VMEXIT)
10465	rcStrict = VINF_SUCCESS;
10466	#endif
10467	/** @todo Are there any other codes that imply the event was successfully
10468	* delivered to the guest? See @bugref{6607}. */
10469	if ( rcStrict == VINF_SUCCESS
10470	\|\| rcStrict == VINF_IEM_RAISED_XCPT)
10471	TRPMResetTrap(pVCpu);
10472
10473	return rcStrict;
10474	#endif
10475	}
10476
10477
10478	VMM_INT_DECL(int) IEMBreakpointSet(PVM pVM, RTGCPTR GCPtrBp)
10479	{
10480	RT_NOREF_PV(pVM); RT_NOREF_PV(GCPtrBp);
10481	return VERR_NOT_IMPLEMENTED;
10482	}
10483
10484
10485	VMM_INT_DECL(int) IEMBreakpointClear(PVM pVM, RTGCPTR GCPtrBp)
10486	{
10487	RT_NOREF_PV(pVM); RT_NOREF_PV(GCPtrBp);
10488	return VERR_NOT_IMPLEMENTED;
10489	}
10490
10491
10492	#if 0 /* The IRET-to-v8086 mode in PATM is very optimistic, so I don't dare do this yet. */
10493	/**
10494	* Executes a IRET instruction with default operand size.
10495	*
10496	* This is for PATM.
10497	*
10498	* @returns VBox status code.
10499	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
10500	* @param pCtxCore The register frame.
10501	*/
10502	VMM_INT_DECL(int) IEMExecInstr_iret(PVMCPUCC pVCpu, PCPUMCTXCORE pCtxCore)
10503	{
10504	PCPUMCTX pCtx = IEM_GET_CTX(pVCpu);
10505
10506	iemCtxCoreToCtx(pCtx, pCtxCore);
10507	iemInitDecoder(pVCpu);
10508	VBOXSTRICTRC rcStrict = iemCImpl_iret(pVCpu, 1, pVCpu->iem.s.enmDefOpSize);
10509	if (rcStrict == VINF_SUCCESS)
10510	iemCtxToCtxCore(pCtxCore, pCtx);
10511	else
10512	LogFlow(("IEMExecInstr_iret: cs:rip=%04x:%08RX64 ss:rsp=%04x:%08RX64 EFL=%06x - rcStrict=%Rrc\n",
10513	pVCpu->cpum.GstCtx.cs, pVCpu->cpum.GstCtx.rip, pVCpu->cpum.GstCtx.ss, pVCpu->cpum.GstCtx.rsp, pVCpu->cpum.GstCtx.eflags.u, VBOXSTRICTRC_VAL(rcStrict)));
10514	return rcStrict;
10515	}
10516	#endif
10517
10518
10519	/**
10520	* Interface for HM and EM for executing string I/O OUT (write) instructions.
10521	*
10522	* This API ASSUMES that the caller has already verified that the guest code is
10523	* allowed to access the I/O port. (The I/O port is in the DX register in the
10524	* guest state.)
10525	*
10526	* @returns Strict VBox status code.
10527	* @param pVCpu The cross context virtual CPU structure.
10528	* @param cbValue The size of the I/O port access (1, 2, or 4).
10529	* @param enmAddrMode The addressing mode.
10530	* @param fRepPrefix Indicates whether a repeat prefix is used
10531	* (doesn't matter which for this instruction).
10532	* @param cbInstr The instruction length in bytes.
10533	* @param iEffSeg The effective segment address.
10534	* @param fIoChecked Whether the access to the I/O port has been
10535	* checked or not. It's typically checked in the
10536	* HM scenario.
10537	*/
10538	VMM_INT_DECL(VBOXSTRICTRC) IEMExecStringIoWrite(PVMCPUCC pVCpu, uint8_t cbValue, IEMMODE enmAddrMode,
10539	bool fRepPrefix, uint8_t cbInstr, uint8_t iEffSeg, bool fIoChecked)
10540	{
10541	AssertMsgReturn(iEffSeg < X86_SREG_COUNT, ("%#x\n", iEffSeg), VERR_IEM_INVALID_EFF_SEG);
10542	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 1);
10543
10544	/*
10545	* State init.
10546	*/
10547	iemInitExec(pVCpu, false /fBypassHandlers/);
10548
10549	/*
10550	* Switch orgy for getting to the right handler.
10551	*/
10552	VBOXSTRICTRC rcStrict;
10553	if (fRepPrefix)
10554	{
10555	switch (enmAddrMode)
10556	{
10557	case IEMMODE_16BIT:
10558	switch (cbValue)
10559	{
10560	case 1: rcStrict = iemCImpl_rep_outs_op8_addr16(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10561	case 2: rcStrict = iemCImpl_rep_outs_op16_addr16(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10562	case 4: rcStrict = iemCImpl_rep_outs_op32_addr16(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10563	default:
10564	AssertMsgFailedReturn(("cbValue=%#x\n", cbValue), VERR_IEM_INVALID_OPERAND_SIZE);
10565	}
10566	break;
10567
10568	case IEMMODE_32BIT:
10569	switch (cbValue)
10570	{
10571	case 1: rcStrict = iemCImpl_rep_outs_op8_addr32(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10572	case 2: rcStrict = iemCImpl_rep_outs_op16_addr32(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10573	case 4: rcStrict = iemCImpl_rep_outs_op32_addr32(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10574	default:
10575	AssertMsgFailedReturn(("cbValue=%#x\n", cbValue), VERR_IEM_INVALID_OPERAND_SIZE);
10576	}
10577	break;
10578
10579	case IEMMODE_64BIT:
10580	switch (cbValue)
10581	{
10582	case 1: rcStrict = iemCImpl_rep_outs_op8_addr64(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10583	case 2: rcStrict = iemCImpl_rep_outs_op16_addr64(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10584	case 4: rcStrict = iemCImpl_rep_outs_op32_addr64(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10585	default:
10586	AssertMsgFailedReturn(("cbValue=%#x\n", cbValue), VERR_IEM_INVALID_OPERAND_SIZE);
10587	}
10588	break;
10589
10590	default:
10591	AssertMsgFailedReturn(("enmAddrMode=%d\n", enmAddrMode), VERR_IEM_INVALID_ADDRESS_MODE);
10592	}
10593	}
10594	else
10595	{
10596	switch (enmAddrMode)
10597	{
10598	case IEMMODE_16BIT:
10599	switch (cbValue)
10600	{
10601	case 1: rcStrict = iemCImpl_outs_op8_addr16(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10602	case 2: rcStrict = iemCImpl_outs_op16_addr16(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10603	case 4: rcStrict = iemCImpl_outs_op32_addr16(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10604	default:
10605	AssertMsgFailedReturn(("cbValue=%#x\n", cbValue), VERR_IEM_INVALID_OPERAND_SIZE);
10606	}
10607	break;
10608
10609	case IEMMODE_32BIT:
10610	switch (cbValue)
10611	{
10612	case 1: rcStrict = iemCImpl_outs_op8_addr32(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10613	case 2: rcStrict = iemCImpl_outs_op16_addr32(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10614	case 4: rcStrict = iemCImpl_outs_op32_addr32(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10615	default:
10616	AssertMsgFailedReturn(("cbValue=%#x\n", cbValue), VERR_IEM_INVALID_OPERAND_SIZE);
10617	}
10618	break;
10619
10620	case IEMMODE_64BIT:
10621	switch (cbValue)
10622	{
10623	case 1: rcStrict = iemCImpl_outs_op8_addr64(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10624	case 2: rcStrict = iemCImpl_outs_op16_addr64(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10625	case 4: rcStrict = iemCImpl_outs_op32_addr64(pVCpu, cbInstr, iEffSeg, fIoChecked); break;
10626	default:
10627	AssertMsgFailedReturn(("cbValue=%#x\n", cbValue), VERR_IEM_INVALID_OPERAND_SIZE);
10628	}
10629	break;
10630
10631	default:
10632	AssertMsgFailedReturn(("enmAddrMode=%d\n", enmAddrMode), VERR_IEM_INVALID_ADDRESS_MODE);
10633	}
10634	}
10635
10636	if (pVCpu->iem.s.cActiveMappings)
10637	iemMemRollback(pVCpu);
10638
10639	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
10640	}
10641
10642
10643	/**
10644	* Interface for HM and EM for executing string I/O IN (read) instructions.
10645	*
10646	* This API ASSUMES that the caller has already verified that the guest code is
10647	* allowed to access the I/O port. (The I/O port is in the DX register in the
10648	* guest state.)
10649	*
10650	* @returns Strict VBox status code.
10651	* @param pVCpu The cross context virtual CPU structure.
10652	* @param cbValue The size of the I/O port access (1, 2, or 4).
10653	* @param enmAddrMode The addressing mode.
10654	* @param fRepPrefix Indicates whether a repeat prefix is used
10655	* (doesn't matter which for this instruction).
10656	* @param cbInstr The instruction length in bytes.
10657	* @param fIoChecked Whether the access to the I/O port has been
10658	* checked or not. It's typically checked in the
10659	* HM scenario.
10660	*/
10661	VMM_INT_DECL(VBOXSTRICTRC) IEMExecStringIoRead(PVMCPUCC pVCpu, uint8_t cbValue, IEMMODE enmAddrMode,
10662	bool fRepPrefix, uint8_t cbInstr, bool fIoChecked)
10663	{
10664	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 1);
10665
10666	/*
10667	* State init.
10668	*/
10669	iemInitExec(pVCpu, false /fBypassHandlers/);
10670
10671	/*
10672	* Switch orgy for getting to the right handler.
10673	*/
10674	VBOXSTRICTRC rcStrict;
10675	if (fRepPrefix)
10676	{
10677	switch (enmAddrMode)
10678	{
10679	case IEMMODE_16BIT:
10680	switch (cbValue)
10681	{
10682	case 1: rcStrict = iemCImpl_rep_ins_op8_addr16(pVCpu, cbInstr, fIoChecked); break;
10683	case 2: rcStrict = iemCImpl_rep_ins_op16_addr16(pVCpu, cbInstr, fIoChecked); break;
10684	case 4: rcStrict = iemCImpl_rep_ins_op32_addr16(pVCpu, cbInstr, fIoChecked); break;
10685	default:
10686	AssertMsgFailedReturn(("cbValue=%#x\n", cbValue), VERR_IEM_INVALID_OPERAND_SIZE);
10687	}
10688	break;
10689
10690	case IEMMODE_32BIT:
10691	switch (cbValue)
10692	{
10693	case 1: rcStrict = iemCImpl_rep_ins_op8_addr32(pVCpu, cbInstr, fIoChecked); break;
10694	case 2: rcStrict = iemCImpl_rep_ins_op16_addr32(pVCpu, cbInstr, fIoChecked); break;
10695	case 4: rcStrict = iemCImpl_rep_ins_op32_addr32(pVCpu, cbInstr, fIoChecked); break;
10696	default:
10697	AssertMsgFailedReturn(("cbValue=%#x\n", cbValue), VERR_IEM_INVALID_OPERAND_SIZE);
10698	}
10699	break;
10700
10701	case IEMMODE_64BIT:
10702	switch (cbValue)
10703	{
10704	case 1: rcStrict = iemCImpl_rep_ins_op8_addr64(pVCpu, cbInstr, fIoChecked); break;
10705	case 2: rcStrict = iemCImpl_rep_ins_op16_addr64(pVCpu, cbInstr, fIoChecked); break;
10706	case 4: rcStrict = iemCImpl_rep_ins_op32_addr64(pVCpu, cbInstr, fIoChecked); break;
10707	default:
10708	AssertMsgFailedReturn(("cbValue=%#x\n", cbValue), VERR_IEM_INVALID_OPERAND_SIZE);
10709	}
10710	break;
10711
10712	default:
10713	AssertMsgFailedReturn(("enmAddrMode=%d\n", enmAddrMode), VERR_IEM_INVALID_ADDRESS_MODE);
10714	}
10715	}
10716	else
10717	{
10718	switch (enmAddrMode)
10719	{
10720	case IEMMODE_16BIT:
10721	switch (cbValue)
10722	{
10723	case 1: rcStrict = iemCImpl_ins_op8_addr16(pVCpu, cbInstr, fIoChecked); break;
10724	case 2: rcStrict = iemCImpl_ins_op16_addr16(pVCpu, cbInstr, fIoChecked); break;
10725	case 4: rcStrict = iemCImpl_ins_op32_addr16(pVCpu, cbInstr, fIoChecked); break;
10726	default:
10727	AssertMsgFailedReturn(("cbValue=%#x\n", cbValue), VERR_IEM_INVALID_OPERAND_SIZE);
10728	}
10729	break;
10730
10731	case IEMMODE_32BIT:
10732	switch (cbValue)
10733	{
10734	case 1: rcStrict = iemCImpl_ins_op8_addr32(pVCpu, cbInstr, fIoChecked); break;
10735	case 2: rcStrict = iemCImpl_ins_op16_addr32(pVCpu, cbInstr, fIoChecked); break;
10736	case 4: rcStrict = iemCImpl_ins_op32_addr32(pVCpu, cbInstr, fIoChecked); break;
10737	default:
10738	AssertMsgFailedReturn(("cbValue=%#x\n", cbValue), VERR_IEM_INVALID_OPERAND_SIZE);
10739	}
10740	break;
10741
10742	case IEMMODE_64BIT:
10743	switch (cbValue)
10744	{
10745	case 1: rcStrict = iemCImpl_ins_op8_addr64(pVCpu, cbInstr, fIoChecked); break;
10746	case 2: rcStrict = iemCImpl_ins_op16_addr64(pVCpu, cbInstr, fIoChecked); break;
10747	case 4: rcStrict = iemCImpl_ins_op32_addr64(pVCpu, cbInstr, fIoChecked); break;
10748	default:
10749	AssertMsgFailedReturn(("cbValue=%#x\n", cbValue), VERR_IEM_INVALID_OPERAND_SIZE);
10750	}
10751	break;
10752
10753	default:
10754	AssertMsgFailedReturn(("enmAddrMode=%d\n", enmAddrMode), VERR_IEM_INVALID_ADDRESS_MODE);
10755	}
10756	}
10757
10758	if ( pVCpu->iem.s.cActiveMappings == 0
10759	\|\| VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_IEM))
10760	{ /* likely */ }
10761	else
10762	{
10763	AssertMsg(!IOM_SUCCESS(rcStrict), ("%#x\n", VBOXSTRICTRC_VAL(rcStrict)));
10764	iemMemRollback(pVCpu);
10765	}
10766	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
10767	}
10768
10769
10770	/**
10771	* Interface for rawmode to write execute an OUT instruction.
10772	*
10773	* @returns Strict VBox status code.
10774	* @param pVCpu The cross context virtual CPU structure.
10775	* @param cbInstr The instruction length in bytes.
10776	* @param u16Port The port to read.
10777	* @param fImm Whether the port is specified using an immediate operand or
10778	* using the implicit DX register.
10779	* @param cbReg The register size.
10780	*
10781	* @remarks In ring-0 not all of the state needs to be synced in.
10782	*/
10783	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedOut(PVMCPUCC pVCpu, uint8_t cbInstr, uint16_t u16Port, bool fImm, uint8_t cbReg)
10784	{
10785	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 1);
10786	Assert(cbReg <= 4 && cbReg != 3);
10787
10788	iemInitExec(pVCpu, false /fBypassHandlers/);
10789	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_3(iemCImpl_out, u16Port, fImm, cbReg);
10790	Assert(!pVCpu->iem.s.cActiveMappings);
10791	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
10792	}
10793
10794
10795	/**
10796	* Interface for rawmode to write execute an IN instruction.
10797	*
10798	* @returns Strict VBox status code.
10799	* @param pVCpu The cross context virtual CPU structure.
10800	* @param cbInstr The instruction length in bytes.
10801	* @param u16Port The port to read.
10802	* @param fImm Whether the port is specified using an immediate operand or
10803	* using the implicit DX.
10804	* @param cbReg The register size.
10805	*/
10806	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedIn(PVMCPUCC pVCpu, uint8_t cbInstr, uint16_t u16Port, bool fImm, uint8_t cbReg)
10807	{
10808	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 1);
10809	Assert(cbReg <= 4 && cbReg != 3);
10810
10811	iemInitExec(pVCpu, false /fBypassHandlers/);
10812	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_3(iemCImpl_in, u16Port, fImm, cbReg);
10813	Assert(!pVCpu->iem.s.cActiveMappings);
10814	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
10815	}
10816
10817
10818	/**
10819	* Interface for HM and EM to write to a CRx register.
10820	*
10821	* @returns Strict VBox status code.
10822	* @param pVCpu The cross context virtual CPU structure.
10823	* @param cbInstr The instruction length in bytes.
10824	* @param iCrReg The control register number (destination).
10825	* @param iGReg The general purpose register number (source).
10826	*
10827	* @remarks In ring-0 not all of the state needs to be synced in.
10828	*/
10829	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedMovCRxWrite(PVMCPUCC pVCpu, uint8_t cbInstr, uint8_t iCrReg, uint8_t iGReg)
10830	{
10831	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 2);
10832	Assert(iCrReg < 16);
10833	Assert(iGReg < 16);
10834
10835	iemInitExec(pVCpu, false /fBypassHandlers/);
10836	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_2(iemCImpl_mov_Cd_Rd, iCrReg, iGReg);
10837	Assert(!pVCpu->iem.s.cActiveMappings);
10838	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
10839	}
10840
10841
10842	/**
10843	* Interface for HM and EM to read from a CRx register.
10844	*
10845	* @returns Strict VBox status code.
10846	* @param pVCpu The cross context virtual CPU structure.
10847	* @param cbInstr The instruction length in bytes.
10848	* @param iGReg The general purpose register number (destination).
10849	* @param iCrReg The control register number (source).
10850	*
10851	* @remarks In ring-0 not all of the state needs to be synced in.
10852	*/
10853	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedMovCRxRead(PVMCPUCC pVCpu, uint8_t cbInstr, uint8_t iGReg, uint8_t iCrReg)
10854	{
10855	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 2);
10856	IEM_CTX_ASSERT(pVCpu, IEM_CPUMCTX_EXTRN_EXEC_DECODED_NO_MEM_MASK \| CPUMCTX_EXTRN_CR3 \| CPUMCTX_EXTRN_CR4
10857	\| CPUMCTX_EXTRN_APIC_TPR);
10858	Assert(iCrReg < 16);
10859	Assert(iGReg < 16);
10860
10861	iemInitExec(pVCpu, false /fBypassHandlers/);
10862	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_2(iemCImpl_mov_Rd_Cd, iGReg, iCrReg);
10863	Assert(!pVCpu->iem.s.cActiveMappings);
10864	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
10865	}
10866
10867
10868	/**
10869	* Interface for HM and EM to clear the CR0[TS] bit.
10870	*
10871	* @returns Strict VBox status code.
10872	* @param pVCpu The cross context virtual CPU structure.
10873	* @param cbInstr The instruction length in bytes.
10874	*
10875	* @remarks In ring-0 not all of the state needs to be synced in.
10876	*/
10877	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedClts(PVMCPUCC pVCpu, uint8_t cbInstr)
10878	{
10879	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 2);
10880
10881	iemInitExec(pVCpu, false /fBypassHandlers/);
10882	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_0(iemCImpl_clts);
10883	Assert(!pVCpu->iem.s.cActiveMappings);
10884	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
10885	}
10886
10887
10888	/**
10889	* Interface for HM and EM to emulate the LMSW instruction (loads CR0).
10890	*
10891	* @returns Strict VBox status code.
10892	* @param pVCpu The cross context virtual CPU structure.
10893	* @param cbInstr The instruction length in bytes.
10894	* @param uValue The value to load into CR0.
10895	* @param GCPtrEffDst The guest-linear address if the LMSW instruction has a
10896	* memory operand. Otherwise pass NIL_RTGCPTR.
10897	*
10898	* @remarks In ring-0 not all of the state needs to be synced in.
10899	*/
10900	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedLmsw(PVMCPUCC pVCpu, uint8_t cbInstr, uint16_t uValue, RTGCPTR GCPtrEffDst)
10901	{
10902	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 3);
10903
10904	iemInitExec(pVCpu, false /fBypassHandlers/);
10905	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_2(iemCImpl_lmsw, uValue, GCPtrEffDst);
10906	Assert(!pVCpu->iem.s.cActiveMappings);
10907	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
10908	}
10909
10910
10911	/**
10912	* Interface for HM and EM to emulate the XSETBV instruction (loads XCRx).
10913	*
10914	* Takes input values in ecx and edx:eax of the CPU context of the calling EMT.
10915	*
10916	* @returns Strict VBox status code.
10917	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
10918	* @param cbInstr The instruction length in bytes.
10919	* @remarks In ring-0 not all of the state needs to be synced in.
10920	* @thread EMT(pVCpu)
10921	*/
10922	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedXsetbv(PVMCPUCC pVCpu, uint8_t cbInstr)
10923	{
10924	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 3);
10925
10926	iemInitExec(pVCpu, false /fBypassHandlers/);
10927	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_0(iemCImpl_xsetbv);
10928	Assert(!pVCpu->iem.s.cActiveMappings);
10929	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
10930	}
10931
10932
10933	/**
10934	* Interface for HM and EM to emulate the WBINVD instruction.
10935	*
10936	* @returns Strict VBox status code.
10937	* @param pVCpu The cross context virtual CPU structure.
10938	* @param cbInstr The instruction length in bytes.
10939	*
10940	* @remarks In ring-0 not all of the state needs to be synced in.
10941	*/
10942	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedWbinvd(PVMCPUCC pVCpu, uint8_t cbInstr)
10943	{
10944	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 2);
10945
10946	iemInitExec(pVCpu, false /fBypassHandlers/);
10947	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_0(iemCImpl_wbinvd);
10948	Assert(!pVCpu->iem.s.cActiveMappings);
10949	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
10950	}
10951
10952
10953	/**
10954	* Interface for HM and EM to emulate the INVD instruction.
10955	*
10956	* @returns Strict VBox status code.
10957	* @param pVCpu The cross context virtual CPU structure.
10958	* @param cbInstr The instruction length in bytes.
10959	*
10960	* @remarks In ring-0 not all of the state needs to be synced in.
10961	*/
10962	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedInvd(PVMCPUCC pVCpu, uint8_t cbInstr)
10963	{
10964	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 2);
10965
10966	iemInitExec(pVCpu, false /fBypassHandlers/);
10967	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_0(iemCImpl_invd);
10968	Assert(!pVCpu->iem.s.cActiveMappings);
10969	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
10970	}
10971
10972
10973	/**
10974	* Interface for HM and EM to emulate the INVLPG instruction.
10975	*
10976	* @returns Strict VBox status code.
10977	* @retval VINF_PGM_SYNC_CR3
10978	*
10979	* @param pVCpu The cross context virtual CPU structure.
10980	* @param cbInstr The instruction length in bytes.
10981	* @param GCPtrPage The effective address of the page to invalidate.
10982	*
10983	* @remarks In ring-0 not all of the state needs to be synced in.
10984	*/
10985	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedInvlpg(PVMCPUCC pVCpu, uint8_t cbInstr, RTGCPTR GCPtrPage)
10986	{
10987	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 3);
10988
10989	iemInitExec(pVCpu, false /fBypassHandlers/);
10990	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_1(iemCImpl_invlpg, GCPtrPage);
10991	Assert(!pVCpu->iem.s.cActiveMappings);
10992	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
10993	}
10994
10995
10996	/**
10997	* Interface for HM and EM to emulate the INVPCID instruction.
10998	*
10999	* @returns Strict VBox status code.
11000	* @retval VINF_PGM_SYNC_CR3
11001	*
11002	* @param pVCpu The cross context virtual CPU structure.
11003	* @param cbInstr The instruction length in bytes.
11004	* @param iEffSeg The effective segment register.
11005	* @param GCPtrDesc The effective address of the INVPCID descriptor.
11006	* @param uType The invalidation type.
11007	*
11008	* @remarks In ring-0 not all of the state needs to be synced in.
11009	*/
11010	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedInvpcid(PVMCPUCC pVCpu, uint8_t cbInstr, uint8_t iEffSeg, RTGCPTR GCPtrDesc,
11011	uint64_t uType)
11012	{
11013	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 4);
11014
11015	iemInitExec(pVCpu, false /fBypassHandlers/);
11016	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_3(iemCImpl_invpcid, iEffSeg, GCPtrDesc, uType);
11017	Assert(!pVCpu->iem.s.cActiveMappings);
11018	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
11019	}
11020
11021
11022	/**
11023	* Interface for HM and EM to emulate the CPUID instruction.
11024	*
11025	* @returns Strict VBox status code.
11026	*
11027	* @param pVCpu The cross context virtual CPU structure.
11028	* @param cbInstr The instruction length in bytes.
11029	*
11030	* @remarks Not all of the state needs to be synced in, the usual pluss RAX and RCX.
11031	*/
11032	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedCpuid(PVMCPUCC pVCpu, uint8_t cbInstr)
11033	{
11034	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 2);
11035	IEM_CTX_ASSERT(pVCpu, IEM_CPUMCTX_EXTRN_EXEC_DECODED_NO_MEM_MASK \| CPUMCTX_EXTRN_RAX \| CPUMCTX_EXTRN_RCX);
11036
11037	iemInitExec(pVCpu, false /fBypassHandlers/);
11038	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_0(iemCImpl_cpuid);
11039	Assert(!pVCpu->iem.s.cActiveMappings);
11040	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
11041	}
11042
11043
11044	/**
11045	* Interface for HM and EM to emulate the RDPMC instruction.
11046	*
11047	* @returns Strict VBox status code.
11048	*
11049	* @param pVCpu The cross context virtual CPU structure.
11050	* @param cbInstr The instruction length in bytes.
11051	*
11052	* @remarks Not all of the state needs to be synced in.
11053	*/
11054	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedRdpmc(PVMCPUCC pVCpu, uint8_t cbInstr)
11055	{
11056	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 2);
11057	IEM_CTX_ASSERT(pVCpu, IEM_CPUMCTX_EXTRN_EXEC_DECODED_NO_MEM_MASK \| CPUMCTX_EXTRN_CR4);
11058
11059	iemInitExec(pVCpu, false /fBypassHandlers/);
11060	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_0(iemCImpl_rdpmc);
11061	Assert(!pVCpu->iem.s.cActiveMappings);
11062	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
11063	}
11064
11065
11066	/**
11067	* Interface for HM and EM to emulate the RDTSC instruction.
11068	*
11069	* @returns Strict VBox status code.
11070	* @retval VINF_IEM_RAISED_XCPT (VINF_EM_RESCHEDULE) if exception is raised.
11071	*
11072	* @param pVCpu The cross context virtual CPU structure.
11073	* @param cbInstr The instruction length in bytes.
11074	*
11075	* @remarks Not all of the state needs to be synced in.
11076	*/
11077	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedRdtsc(PVMCPUCC pVCpu, uint8_t cbInstr)
11078	{
11079	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 2);
11080	IEM_CTX_ASSERT(pVCpu, IEM_CPUMCTX_EXTRN_EXEC_DECODED_NO_MEM_MASK \| CPUMCTX_EXTRN_CR4);
11081
11082	iemInitExec(pVCpu, false /fBypassHandlers/);
11083	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_0(iemCImpl_rdtsc);
11084	Assert(!pVCpu->iem.s.cActiveMappings);
11085	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
11086	}
11087
11088
11089	/**
11090	* Interface for HM and EM to emulate the RDTSCP instruction.
11091	*
11092	* @returns Strict VBox status code.
11093	* @retval VINF_IEM_RAISED_XCPT (VINF_EM_RESCHEDULE) if exception is raised.
11094	*
11095	* @param pVCpu The cross context virtual CPU structure.
11096	* @param cbInstr The instruction length in bytes.
11097	*
11098	* @remarks Not all of the state needs to be synced in. Recommended
11099	* to include CPUMCTX_EXTRN_TSC_AUX, to avoid extra fetch call.
11100	*/
11101	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedRdtscp(PVMCPUCC pVCpu, uint8_t cbInstr)
11102	{
11103	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 3);
11104	IEM_CTX_ASSERT(pVCpu, IEM_CPUMCTX_EXTRN_EXEC_DECODED_NO_MEM_MASK \| CPUMCTX_EXTRN_CR4 \| CPUMCTX_EXTRN_TSC_AUX);
11105
11106	iemInitExec(pVCpu, false /fBypassHandlers/);
11107	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_0(iemCImpl_rdtscp);
11108	Assert(!pVCpu->iem.s.cActiveMappings);
11109	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
11110	}
11111
11112
11113	/**
11114	* Interface for HM and EM to emulate the RDMSR instruction.
11115	*
11116	* @returns Strict VBox status code.
11117	* @retval VINF_IEM_RAISED_XCPT (VINF_EM_RESCHEDULE) if exception is raised.
11118	*
11119	* @param pVCpu The cross context virtual CPU structure.
11120	* @param cbInstr The instruction length in bytes.
11121	*
11122	* @remarks Not all of the state needs to be synced in. Requires RCX and
11123	* (currently) all MSRs.
11124	*/
11125	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedRdmsr(PVMCPUCC pVCpu, uint8_t cbInstr)
11126	{
11127	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 2);
11128	IEM_CTX_ASSERT(pVCpu, IEM_CPUMCTX_EXTRN_EXEC_DECODED_NO_MEM_MASK \| CPUMCTX_EXTRN_RCX \| CPUMCTX_EXTRN_ALL_MSRS);
11129
11130	iemInitExec(pVCpu, false /fBypassHandlers/);
11131	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_0(iemCImpl_rdmsr);
11132	Assert(!pVCpu->iem.s.cActiveMappings);
11133	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
11134	}
11135
11136
11137	/**
11138	* Interface for HM and EM to emulate the WRMSR instruction.
11139	*
11140	* @returns Strict VBox status code.
11141	* @retval VINF_IEM_RAISED_XCPT (VINF_EM_RESCHEDULE) if exception is raised.
11142	*
11143	* @param pVCpu The cross context virtual CPU structure.
11144	* @param cbInstr The instruction length in bytes.
11145	*
11146	* @remarks Not all of the state needs to be synced in. Requires RCX, RAX, RDX,
11147	* and (currently) all MSRs.
11148	*/
11149	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedWrmsr(PVMCPUCC pVCpu, uint8_t cbInstr)
11150	{
11151	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 2);
11152	IEM_CTX_ASSERT(pVCpu, IEM_CPUMCTX_EXTRN_EXEC_DECODED_NO_MEM_MASK
11153	\| CPUMCTX_EXTRN_RCX \| CPUMCTX_EXTRN_RAX \| CPUMCTX_EXTRN_RDX \| CPUMCTX_EXTRN_ALL_MSRS);
11154
11155	iemInitExec(pVCpu, false /fBypassHandlers/);
11156	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_0(iemCImpl_wrmsr);
11157	Assert(!pVCpu->iem.s.cActiveMappings);
11158	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
11159	}
11160
11161
11162	/**
11163	* Interface for HM and EM to emulate the MONITOR instruction.
11164	*
11165	* @returns Strict VBox status code.
11166	* @retval VINF_IEM_RAISED_XCPT (VINF_EM_RESCHEDULE) if exception is raised.
11167	*
11168	* @param pVCpu The cross context virtual CPU structure.
11169	* @param cbInstr The instruction length in bytes.
11170	*
11171	* @remarks Not all of the state needs to be synced in.
11172	* @remarks ASSUMES the default segment of DS and no segment override prefixes
11173	* are used.
11174	*/
11175	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedMonitor(PVMCPUCC pVCpu, uint8_t cbInstr)
11176	{
11177	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 3);
11178	IEM_CTX_ASSERT(pVCpu, IEM_CPUMCTX_EXTRN_EXEC_DECODED_MEM_MASK \| CPUMCTX_EXTRN_DS);
11179
11180	iemInitExec(pVCpu, false /fBypassHandlers/);
11181	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_1(iemCImpl_monitor, X86_SREG_DS);
11182	Assert(!pVCpu->iem.s.cActiveMappings);
11183	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
11184	}
11185
11186
11187	/**
11188	* Interface for HM and EM to emulate the MWAIT instruction.
11189	*
11190	* @returns Strict VBox status code.
11191	* @retval VINF_IEM_RAISED_XCPT (VINF_EM_RESCHEDULE) if exception is raised.
11192	*
11193	* @param pVCpu The cross context virtual CPU structure.
11194	* @param cbInstr The instruction length in bytes.
11195	*
11196	* @remarks Not all of the state needs to be synced in.
11197	*/
11198	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedMwait(PVMCPUCC pVCpu, uint8_t cbInstr)
11199	{
11200	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 3);
11201	IEM_CTX_ASSERT(pVCpu, IEM_CPUMCTX_EXTRN_EXEC_DECODED_NO_MEM_MASK \| CPUMCTX_EXTRN_RCX \| CPUMCTX_EXTRN_RAX);
11202
11203	iemInitExec(pVCpu, false /fBypassHandlers/);
11204	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_0(iemCImpl_mwait);
11205	Assert(!pVCpu->iem.s.cActiveMappings);
11206	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
11207	}
11208
11209
11210	/**
11211	* Interface for HM and EM to emulate the HLT instruction.
11212	*
11213	* @returns Strict VBox status code.
11214	* @retval VINF_IEM_RAISED_XCPT (VINF_EM_RESCHEDULE) if exception is raised.
11215	*
11216	* @param pVCpu The cross context virtual CPU structure.
11217	* @param cbInstr The instruction length in bytes.
11218	*
11219	* @remarks Not all of the state needs to be synced in.
11220	*/
11221	VMM_INT_DECL(VBOXSTRICTRC) IEMExecDecodedHlt(PVMCPUCC pVCpu, uint8_t cbInstr)
11222	{
11223	IEMEXEC_ASSERT_INSTR_LEN_RETURN(cbInstr, 1);
11224
11225	iemInitExec(pVCpu, false /fBypassHandlers/);
11226	VBOXSTRICTRC rcStrict = IEM_CIMPL_CALL_0(iemCImpl_hlt);
11227	Assert(!pVCpu->iem.s.cActiveMappings);
11228	return iemUninitExecAndFiddleStatusAndMaybeReenter(pVCpu, rcStrict);
11229	}
11230
11231
11232	/**
11233	* Checks if IEM is in the process of delivering an event (interrupt or
11234	* exception).
11235	*
11236	* @returns true if we're in the process of raising an interrupt or exception,
11237	* false otherwise.
11238	* @param pVCpu The cross context virtual CPU structure.
11239	* @param puVector Where to store the vector associated with the
11240	* currently delivered event, optional.
11241	* @param pfFlags Where to store th event delivery flags (see
11242	* IEM_XCPT_FLAGS_XXX), optional.
11243	* @param puErr Where to store the error code associated with the
11244	* event, optional.
11245	* @param puCr2 Where to store the CR2 associated with the event,
11246	* optional.
11247	* @remarks The caller should check the flags to determine if the error code and
11248	* CR2 are valid for the event.
11249	*/
11250	VMM_INT_DECL(bool) IEMGetCurrentXcpt(PVMCPUCC pVCpu, uint8_t puVector, uint32_t pfFlags, uint32_t puErr, uint64_t puCr2)
11251	{
11252	bool const fRaisingXcpt = pVCpu->iem.s.cXcptRecursions > 0;
11253	if (fRaisingXcpt)
11254	{
11255	if (puVector)
11256	*puVector = pVCpu->iem.s.uCurXcpt;
11257	if (pfFlags)
11258	*pfFlags = pVCpu->iem.s.fCurXcpt;
11259	if (puErr)
11260	*puErr = pVCpu->iem.s.uCurXcptErr;
11261	if (puCr2)
11262	*puCr2 = pVCpu->iem.s.uCurXcptCr2;
11263	}
11264	return fRaisingXcpt;
11265	}
11266
11267	#ifdef IN_RING3
11268
11269	/**
11270	* Handles the unlikely and probably fatal merge cases.
11271	*
11272	* @returns Merged status code.
11273	* @param rcStrict Current EM status code.
11274	* @param rcStrictCommit The IOM I/O or MMIO write commit status to merge
11275	* with @a rcStrict.
11276	* @param iMemMap The memory mapping index. For error reporting only.
11277	* @param pVCpu The cross context virtual CPU structure of the calling
11278	* thread, for error reporting only.
11279	*/
11280	DECL_NO_INLINE(static, VBOXSTRICTRC) iemR3MergeStatusSlow(VBOXSTRICTRC rcStrict, VBOXSTRICTRC rcStrictCommit,
11281	unsigned iMemMap, PVMCPUCC pVCpu)
11282	{
11283	if (RT_FAILURE_NP(rcStrict))
11284	return rcStrict;
11285
11286	if (RT_FAILURE_NP(rcStrictCommit))
11287	return rcStrictCommit;
11288
11289	if (rcStrict == rcStrictCommit)
11290	return rcStrictCommit;
11291
11292	AssertLogRelMsgFailed(("rcStrictCommit=%Rrc rcStrict=%Rrc iMemMap=%u fAccess=%#x FirstPg=%RGp LB %u SecondPg=%RGp LB %u\n",
11293	VBOXSTRICTRC_VAL(rcStrictCommit), VBOXSTRICTRC_VAL(rcStrict), iMemMap,
11294	pVCpu->iem.s.aMemMappings[iMemMap].fAccess,
11295	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst, pVCpu->iem.s.aMemBbMappings[iMemMap].cbFirst,
11296	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond, pVCpu->iem.s.aMemBbMappings[iMemMap].cbSecond));
11297	return VERR_IOM_FF_STATUS_IPE;
11298	}
11299
11300
11301	/**
11302	* Helper for IOMR3ProcessForceFlag.
11303	*
11304	* @returns Merged status code.
11305	* @param rcStrict Current EM status code.
11306	* @param rcStrictCommit The IOM I/O or MMIO write commit status to merge
11307	* with @a rcStrict.
11308	* @param iMemMap The memory mapping index. For error reporting only.
11309	* @param pVCpu The cross context virtual CPU structure of the calling
11310	* thread, for error reporting only.
11311	*/
11312	DECLINLINE(VBOXSTRICTRC) iemR3MergeStatus(VBOXSTRICTRC rcStrict, VBOXSTRICTRC rcStrictCommit, unsigned iMemMap, PVMCPUCC pVCpu)
11313	{
11314	/* Simple. */
11315	if (RT_LIKELY(rcStrict == VINF_SUCCESS \|\| rcStrict == VINF_EM_RAW_TO_R3))
11316	return rcStrictCommit;
11317
11318	if (RT_LIKELY(rcStrictCommit == VINF_SUCCESS))
11319	return rcStrict;
11320
11321	/* EM scheduling status codes. */
11322	if (RT_LIKELY( rcStrict >= VINF_EM_FIRST
11323	&& rcStrict <= VINF_EM_LAST))
11324	{
11325	if (RT_LIKELY( rcStrictCommit >= VINF_EM_FIRST
11326	&& rcStrictCommit <= VINF_EM_LAST))
11327	return rcStrict < rcStrictCommit ? rcStrict : rcStrictCommit;
11328	}
11329
11330	/* Unlikely */
11331	return iemR3MergeStatusSlow(rcStrict, rcStrictCommit, iMemMap, pVCpu);
11332	}
11333
11334
11335	/**
11336	* Called by force-flag handling code when VMCPU_FF_IEM is set.
11337	*
11338	* @returns Merge between @a rcStrict and what the commit operation returned.
11339	* @param pVM The cross context VM structure.
11340	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
11341	* @param rcStrict The status code returned by ring-0 or raw-mode.
11342	*/
11343	VMMR3_INT_DECL(VBOXSTRICTRC) IEMR3ProcessForceFlag(PVM pVM, PVMCPUCC pVCpu, VBOXSTRICTRC rcStrict)
11344	{
11345	/*
11346	* Reset the pending commit.
11347	*/
11348	AssertMsg( (pVCpu->iem.s.aMemMappings[0].fAccess \| pVCpu->iem.s.aMemMappings[1].fAccess \| pVCpu->iem.s.aMemMappings[2].fAccess)
11349	& (IEM_ACCESS_PENDING_R3_WRITE_1ST \| IEM_ACCESS_PENDING_R3_WRITE_2ND),
11350	("%#x %#x %#x\n",
11351	pVCpu->iem.s.aMemMappings[0].fAccess, pVCpu->iem.s.aMemMappings[1].fAccess, pVCpu->iem.s.aMemMappings[2].fAccess));
11352	VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_IEM);
11353
11354	/*
11355	* Commit the pending bounce buffers (usually just one).
11356	*/
11357	unsigned cBufs = 0;
11358	unsigned iMemMap = RT_ELEMENTS(pVCpu->iem.s.aMemMappings);
11359	while (iMemMap-- > 0)
11360	if (pVCpu->iem.s.aMemMappings[iMemMap].fAccess & (IEM_ACCESS_PENDING_R3_WRITE_1ST \| IEM_ACCESS_PENDING_R3_WRITE_2ND))
11361	{
11362	Assert(pVCpu->iem.s.aMemMappings[iMemMap].fAccess & IEM_ACCESS_TYPE_WRITE);
11363	Assert(pVCpu->iem.s.aMemMappings[iMemMap].fAccess & IEM_ACCESS_BOUNCE_BUFFERED);
11364	Assert(!pVCpu->iem.s.aMemBbMappings[iMemMap].fUnassigned);
11365
11366	uint16_t const cbFirst = pVCpu->iem.s.aMemBbMappings[iMemMap].cbFirst;
11367	uint16_t const cbSecond = pVCpu->iem.s.aMemBbMappings[iMemMap].cbSecond;
11368	uint8_t const *pbBuf = &pVCpu->iem.s.aBounceBuffers[iMemMap].ab[0];
11369
11370	if (pVCpu->iem.s.aMemMappings[iMemMap].fAccess & IEM_ACCESS_PENDING_R3_WRITE_1ST)
11371	{
11372	VBOXSTRICTRC rcStrictCommit1 = PGMPhysWrite(pVM,
11373	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst,
11374	pbBuf,
11375	cbFirst,
11376	PGMACCESSORIGIN_IEM);
11377	rcStrict = iemR3MergeStatus(rcStrict, rcStrictCommit1, iMemMap, pVCpu);
11378	Log(("IEMR3ProcessForceFlag: iMemMap=%u GCPhysFirst=%RGp LB %#x %Rrc => %Rrc\n",
11379	iMemMap, pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysFirst, cbFirst,
11380	VBOXSTRICTRC_VAL(rcStrictCommit1), VBOXSTRICTRC_VAL(rcStrict)));
11381	}
11382
11383	if (pVCpu->iem.s.aMemMappings[iMemMap].fAccess & IEM_ACCESS_PENDING_R3_WRITE_2ND)
11384	{
11385	VBOXSTRICTRC rcStrictCommit2 = PGMPhysWrite(pVM,
11386	pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond,
11387	pbBuf + cbFirst,
11388	cbSecond,
11389	PGMACCESSORIGIN_IEM);
11390	rcStrict = iemR3MergeStatus(rcStrict, rcStrictCommit2, iMemMap, pVCpu);
11391	Log(("IEMR3ProcessForceFlag: iMemMap=%u GCPhysSecond=%RGp LB %#x %Rrc => %Rrc\n",
11392	iMemMap, pVCpu->iem.s.aMemBbMappings[iMemMap].GCPhysSecond, cbSecond,
11393	VBOXSTRICTRC_VAL(rcStrictCommit2), VBOXSTRICTRC_VAL(rcStrict)));
11394	}
11395	cBufs++;
11396	pVCpu->iem.s.aMemMappings[iMemMap].fAccess = IEM_ACCESS_INVALID;
11397	}
11398
11399	AssertMsg(cBufs > 0 && cBufs == pVCpu->iem.s.cActiveMappings,
11400	("cBufs=%u cActiveMappings=%u - %#x %#x %#x\n", cBufs, pVCpu->iem.s.cActiveMappings,
11401	pVCpu->iem.s.aMemMappings[0].fAccess, pVCpu->iem.s.aMemMappings[1].fAccess, pVCpu->iem.s.aMemMappings[2].fAccess));
11402	pVCpu->iem.s.cActiveMappings = 0;
11403	return rcStrict;
11404	}
11405
11406	#endif /* IN_RING3 */
11407

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source: vbox/trunk/src/VBox/VMM/VMMAll/IEMAll.cpp@ 97156

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