DBGFAll.cpp@ 104188

Last change on this file since 104188 was 99051, checked in by vboxsync, 21 months ago
VMM: More ARMv8 x86/amd64 separation work, VBoxVMMArm compiles and links now, bugref:10385
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1	/* $Id: DBGFAll.cpp 99051 2023-03-19 16:40:06Z vboxsync $ */
2	/** @file
3	* DBGF - Debugger Facility, All Context Code.
4	*/
5
6	/*
7	* Copyright (C) 2006-2023 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	/*********************************************************************************************************************************
30	* Header Files *
31	*********************************************************************************************************************************/
32	#define LOG_GROUP LOG_GROUP_DBGF
33	#define VMCPU_INCL_CPUM_GST_CTX
34	#include <VBox/vmm/dbgf.h>
35	#include "DBGFInternal.h"
36	#include <VBox/vmm/cpum.h>
37	#include <VBox/vmm/vmcc.h>
38	#include <VBox/err.h>
39	#include <iprt/assert.h>
40	#include <iprt/asm.h>
41	#include <iprt/stdarg.h>
42
43
44	/*
45	* Check the read-only VM members.
46	*/
47	AssertCompileMembersSameSizeAndOffset(VM, dbgf.s.bmSoftIntBreakpoints, VM, dbgf.ro.bmSoftIntBreakpoints);
48	AssertCompileMembersSameSizeAndOffset(VM, dbgf.s.bmHardIntBreakpoints, VM, dbgf.ro.bmHardIntBreakpoints);
49	AssertCompileMembersSameSizeAndOffset(VM, dbgf.s.bmSelectedEvents, VM, dbgf.ro.bmSelectedEvents);
50	AssertCompileMembersSameSizeAndOffset(VM, dbgf.s.cHardIntBreakpoints, VM, dbgf.ro.cHardIntBreakpoints);
51	AssertCompileMembersSameSizeAndOffset(VM, dbgf.s.cSoftIntBreakpoints, VM, dbgf.ro.cSoftIntBreakpoints);
52	AssertCompileMembersSameSizeAndOffset(VM, dbgf.s.cSelectedEvents, VM, dbgf.ro.cSelectedEvents);
53
54
55	#if !defined(VBOX_VMM_TARGET_ARMV8)
56	/**
57	* Gets the hardware breakpoint configuration as DR7.
58	*
59	* @returns DR7 from the DBGF point of view.
60	* @param pVM The cross context VM structure.
61	*/
62	VMM_INT_DECL(RTGCUINTREG) DBGFBpGetDR7(PVM pVM)
63	{
64	RTGCUINTREG uDr7 = X86_DR7_GD \| X86_DR7_GE \| X86_DR7_LE \| X86_DR7_RA1_MASK;
65	for (uint32_t i = 0; i < RT_ELEMENTS(pVM->dbgf.s.aHwBreakpoints); i++)
66	{
67	if ( pVM->dbgf.s.aHwBreakpoints[i].fEnabled
68	&& pVM->dbgf.s.aHwBreakpoints[i].hBp != NIL_DBGFBP)
69	{
70	static const uint8_t s_au8Sizes[8] =
71	{
72	X86_DR7_LEN_BYTE, X86_DR7_LEN_BYTE, X86_DR7_LEN_WORD, X86_DR7_LEN_BYTE,
73	X86_DR7_LEN_DWORD,X86_DR7_LEN_BYTE, X86_DR7_LEN_BYTE, X86_DR7_LEN_QWORD
74	};
75	uDr7 \|= X86_DR7_G(i)
76	\| X86_DR7_RW(i, pVM->dbgf.s.aHwBreakpoints[i].fType)
77	\| X86_DR7_LEN(i, s_au8Sizes[pVM->dbgf.s.aHwBreakpoints[i].cb]);
78	}
79	}
80	return uDr7;
81	}
82
83
84	/**
85	* Gets the address of the hardware breakpoint number 0.
86	*
87	* @returns DR0 from the DBGF point of view.
88	* @param pVM The cross context VM structure.
89	*/
90	VMM_INT_DECL(RTGCUINTREG) DBGFBpGetDR0(PVM pVM)
91	{
92	return pVM->dbgf.s.aHwBreakpoints[0].GCPtr;
93	}
94
95
96	/**
97	* Gets the address of the hardware breakpoint number 1.
98	*
99	* @returns DR1 from the DBGF point of view.
100	* @param pVM The cross context VM structure.
101	*/
102	VMM_INT_DECL(RTGCUINTREG) DBGFBpGetDR1(PVM pVM)
103	{
104	return pVM->dbgf.s.aHwBreakpoints[1].GCPtr;
105	}
106
107
108	/**
109	* Gets the address of the hardware breakpoint number 2.
110	*
111	* @returns DR2 from the DBGF point of view.
112	* @param pVM The cross context VM structure.
113	*/
114	VMM_INT_DECL(RTGCUINTREG) DBGFBpGetDR2(PVM pVM)
115	{
116	return pVM->dbgf.s.aHwBreakpoints[2].GCPtr;
117	}
118
119
120	/**
121	* Gets the address of the hardware breakpoint number 3.
122	*
123	* @returns DR3 from the DBGF point of view.
124	* @param pVM The cross context VM structure.
125	*/
126	VMM_INT_DECL(RTGCUINTREG) DBGFBpGetDR3(PVM pVM)
127	{
128	return pVM->dbgf.s.aHwBreakpoints[3].GCPtr;
129	}
130
131
132	/**
133	* Checks if any of the hardware breakpoints are armed.
134	*
135	* @returns true if armed, false if not.
136	* @param pVM The cross context VM structure.
137	* @remarks Don't call this from CPUMRecalcHyperDRx!
138	*/
139	VMM_INT_DECL(bool) DBGFBpIsHwArmed(PVM pVM)
140	{
141	return pVM->dbgf.s.cEnabledHwBreakpoints > 0;
142	}
143
144
145	/**
146	* Checks if any of the hardware I/O breakpoints are armed.
147	*
148	* @returns true if armed, false if not.
149	* @param pVM The cross context VM structure.
150	* @remarks Don't call this from CPUMRecalcHyperDRx!
151	*/
152	VMM_INT_DECL(bool) DBGFBpIsHwIoArmed(PVM pVM)
153	{
154	return pVM->dbgf.s.cEnabledHwIoBreakpoints > 0;
155	}
156
157
158	/**
159	* Checks if any INT3 breakpoints are armed.
160	*
161	* @returns true if armed, false if not.
162	* @param pVM The cross context VM structure.
163	* @remarks Don't call this from CPUMRecalcHyperDRx!
164	*/
165	VMM_INT_DECL(bool) DBGFBpIsInt3Armed(PVM pVM)
166	{
167	/** @todo There was a todo here and returning false when I (bird) removed
168	* VBOX_WITH_LOTS_OF_DBGF_BPS, so this might not be correct. */
169	return pVM->dbgf.s.cEnabledInt3Breakpoints > 0;
170	}
171
172
173	/**
174	* Checks instruction boundrary for guest or hypervisor hardware breakpoints.
175	*
176	* @returns Strict VBox status code. May return DRx register import errors in
177	* addition to the ones detailed.
178	* @retval VINF_SUCCESS no breakpoint.
179	* @retval VINF_EM_DBG_BREAKPOINT hypervisor breakpoint triggered.
180	* @retval VINF_EM_RAW_GUEST_TRAP caller must trigger \#DB trap, DR6 and DR7
181	* have been updated appropriately.
182	*
183	* @param pVM The cross context VM structure.
184	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
185	* @param GCPtrPC The unsegmented PC address.
186	*/
187	VMM_INT_DECL(VBOXSTRICTRC) DBGFBpCheckInstruction(PVMCC pVM, PVMCPUCC pVCpu, RTGCPTR GCPtrPC)
188	{
189	CPUM_ASSERT_NOT_EXTRN(pVCpu, CPUMCTX_EXTRN_DR7);
190
191	/*
192	* Check hyper breakpoints first as the VMM debugger has priority over
193	* the guest.
194	*/
195	/** @todo we need some kind of resume flag for these. */
196	if (pVM->dbgf.s.cEnabledHwBreakpoints > 0)
197	for (unsigned iBp = 0; iBp < RT_ELEMENTS(pVM->dbgf.s.aHwBreakpoints); iBp++)
198	{
199	if ( pVM->dbgf.s.aHwBreakpoints[iBp].GCPtr != GCPtrPC
200	\|\| pVM->dbgf.s.aHwBreakpoints[iBp].fType != X86_DR7_RW_EO
201	\|\| pVM->dbgf.s.aHwBreakpoints[iBp].cb != 1
202	\|\| !pVM->dbgf.s.aHwBreakpoints[iBp].fEnabled
203	\|\| pVM->dbgf.s.aHwBreakpoints[iBp].hBp == NIL_DBGFBP)
204	{ /likely/ }
205	else
206	{
207	/* (See also DBGFRZTrap01Handler.) */
208	pVCpu->dbgf.s.hBpActive = pVM->dbgf.s.aHwBreakpoints[iBp].hBp;
209	pVCpu->dbgf.s.fSingleSteppingRaw = false;
210
211	LogFlow(("DBGFBpCheckInstruction: hit hw breakpoint %u at %04x:%RGv (%RGv)\n",
212	iBp, pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, GCPtrPC));
213	return VINF_EM_DBG_BREAKPOINT;
214	}
215	}
216
217	/*
218	* Check the guest.
219	*/
220	uint32_t const fDr7 = (uint32_t)pVCpu->cpum.GstCtx.dr[7];
221	if (X86_DR7_ANY_EO_ENABLED(fDr7) && !pVCpu->cpum.GstCtx.eflags.Bits.u1RF)
222	{
223	/*
224	* The CPU (10980XE & 6700K at least) will set the DR6.BPx bits for any
225	* DRx that matches the current PC and is configured as an execution
226	* breakpoint (RWx=EO, LENx=1byte). They don't have to be enabled,
227	* however one that is enabled must match for the #DB to be raised and
228	* DR6 to be modified, of course.
229	*/
230	CPUM_IMPORT_EXTRN_RET(pVCpu, CPUMCTX_EXTRN_DR0_DR3);
231	uint32_t fMatched = 0;
232	uint32_t fEnabled = 0;
233	for (unsigned iBp = 0, uBpMask = 1; iBp < 4; iBp++, uBpMask <<= 1)
234	if (X86_DR7_IS_EO_CFG(fDr7, iBp))
235	{
236	if (fDr7 & X86_DR7_L_G(iBp))
237	fEnabled \|= uBpMask;
238	if (pVCpu->cpum.GstCtx.dr[iBp] == GCPtrPC)
239	fMatched \|= uBpMask;
240	}
241	if (!(fEnabled & fMatched))
242	{ /likely/ }
243	else if (fEnabled & fMatched)
244	{
245	/*
246	* Update DR6 and DR7.
247	*
248	* See "AMD64 Architecture Programmer's Manual Volume 2", chapter
249	* 13.1.1.3 for details on DR6 bits. The basics is that the B0..B3
250	* bits are always cleared while the others must be cleared by software.
251	*
252	* The following sub chapters says the GD bit is always cleared when
253	* generating a #DB so the handler can safely access the debug registers.
254	*/
255	CPUM_IMPORT_EXTRN_RET(pVCpu, CPUMCTX_EXTRN_DR6);
256	pVCpu->cpum.GstCtx.dr[6] &= ~X86_DR6_B_MASK;
257	if (pVM->cpum.ro.GuestFeatures.enmCpuVendor != CPUMCPUVENDOR_INTEL)
258	pVCpu->cpum.GstCtx.dr[6] \|= fMatched & fEnabled;
259	else
260	pVCpu->cpum.GstCtx.dr[6] \|= fMatched; /* Intel: All matched, regardless of whether they're enabled or not */
261	pVCpu->cpum.GstCtx.dr[7] &= ~X86_DR7_GD;
262	LogFlow(("DBGFBpCheckInstruction: hit hw breakpoints %#x at %04x:%RGv (%RGv)\n",
263	fMatched, pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, GCPtrPC));
264	return VINF_EM_RAW_GUEST_TRAP;
265	}
266	}
267	return VINF_SUCCESS;
268	}
269
270
271	/**
272	* Checks I/O access for guest or hypervisor hardware breakpoints.
273	*
274	* @returns Strict VBox status code
275	* @retval VINF_SUCCESS no breakpoint.
276	* @retval VINF_EM_DBG_BREAKPOINT hypervisor breakpoint triggered.
277	* @retval VINF_EM_RAW_GUEST_TRAP guest breakpoint triggered, DR6 and DR7 have
278	* been updated appropriately.
279	*
280	* @param pVM The cross context VM structure.
281	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
282	* @param pCtx The CPU context for the calling EMT.
283	* @param uIoPort The I/O port being accessed.
284	* @param cbValue The size/width of the access, in bytes.
285	*/
286	VMM_INT_DECL(VBOXSTRICTRC) DBGFBpCheckIo(PVM pVM, PVMCPU pVCpu, PCPUMCTX pCtx, RTIOPORT uIoPort, uint8_t cbValue)
287	{
288	uint32_t const uIoPortFirst = uIoPort;
289	uint32_t const uIoPortLast = uIoPortFirst + cbValue - 1;
290
291	/*
292	* Check hyper breakpoints first as the VMM debugger has priority over
293	* the guest.
294	*/
295	if (pVM->dbgf.s.cEnabledHwIoBreakpoints > 0)
296	{
297	for (unsigned iBp = 0; iBp < RT_ELEMENTS(pVM->dbgf.s.aHwBreakpoints); iBp++)
298	{
299	if ( pVM->dbgf.s.aHwBreakpoints[iBp].fType == X86_DR7_RW_IO
300	&& pVM->dbgf.s.aHwBreakpoints[iBp].fEnabled
301	&& pVM->dbgf.s.aHwBreakpoints[iBp].hBp != NIL_DBGFBP)
302	{
303	uint8_t cbReg = pVM->dbgf.s.aHwBreakpoints[iBp].cb; Assert(RT_IS_POWER_OF_TWO(cbReg));
304	uint64_t uDrXFirst = pVM->dbgf.s.aHwBreakpoints[iBp].GCPtr & ~(uint64_t)(cbReg - 1);
305	uint64_t uDrXLast = uDrXFirst + cbReg - 1;
306	if (uDrXFirst <= uIoPortLast && uDrXLast >= uIoPortFirst)
307	{
308	/* (See also DBGFRZTrap01Handler.) */
309	pVCpu->dbgf.s.hBpActive = pVM->dbgf.s.aHwBreakpoints[iBp].hBp;
310	pVCpu->dbgf.s.fSingleSteppingRaw = false;
311
312	LogFlow(("DBGFBpCheckIo: hit hw breakpoint %d at %04x:%RGv (iop %#x)\n",
313	iBp, pCtx->cs.Sel, pCtx->rip, uIoPort));
314	return VINF_EM_DBG_BREAKPOINT;
315	}
316	}
317	}
318	}
319
320	/*
321	* Check the guest.
322	*/
323	uint32_t const uDr7 = pCtx->dr[7];
324	if ( (uDr7 & X86_DR7_ENABLED_MASK)
325	&& X86_DR7_ANY_RW_IO(uDr7)
326	&& (pCtx->cr4 & X86_CR4_DE) )
327	{
328	for (unsigned iBp = 0; iBp < 4; iBp++)
329	{
330	if ( (uDr7 & X86_DR7_L_G(iBp))
331	&& X86_DR7_GET_RW(uDr7, iBp) == X86_DR7_RW_IO)
332	{
333	/* ASSUME the breakpoint and the I/O width qualifier uses the same encoding (1 2 x 4). */
334	static uint8_t const s_abInvAlign[4] = { 0, 1, 7, 3 };
335	uint8_t cbInvAlign = s_abInvAlign[X86_DR7_GET_LEN(uDr7, iBp)];
336	uint64_t uDrXFirst = pCtx->dr[iBp] & ~(uint64_t)cbInvAlign;
337	uint64_t uDrXLast = uDrXFirst + cbInvAlign;
338
339	if (uDrXFirst <= uIoPortLast && uDrXLast >= uIoPortFirst)
340	{
341	/*
342	* Update DR6 and DR7.
343	*
344	* See "AMD64 Architecture Programmer's Manual Volume 2",
345	* chapter 13.1.1.3 for details on DR6 bits. The basics is
346	* that the B0..B3 bits are always cleared while the others
347	* must be cleared by software.
348	*
349	* The following sub chapters says the GD bit is always
350	* cleared when generating a #DB so the handler can safely
351	* access the debug registers.
352	*/
353	pCtx->dr[6] &= ~X86_DR6_B_MASK;
354	pCtx->dr[6] \|= X86_DR6_B(iBp);
355	pCtx->dr[7] &= ~X86_DR7_GD;
356	LogFlow(("DBGFBpCheckIo: hit hw breakpoint %d at %04x:%RGv (iop %#x)\n",
357	iBp, pCtx->cs.Sel, pCtx->rip, uIoPort));
358	return VINF_EM_RAW_GUEST_TRAP;
359	}
360	}
361	}
362	}
363	return VINF_SUCCESS;
364	}
365
366
367	/**
368	* Checks I/O access for guest or hypervisor hardware breakpoints.
369	*
370	* Caller must make sure DR0-3 and DR7 are present in the CPU context before
371	* calling this function.
372	*
373	* @returns CPUMCTX_DBG_DBGF_BP, CPUMCTX_DBG_HIT_DRX_MASK, or 0 (no match).
374	*
375	* @param pVM The cross context VM structure.
376	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
377	* @param uIoPort The I/O port being accessed.
378	* @param cbValue The size/width of the access, in bytes.
379	*/
380	VMM_INT_DECL(uint32_t) DBGFBpCheckIo2(PVMCC pVM, PVMCPUCC pVCpu, RTIOPORT uIoPort, uint8_t cbValue)
381	{
382	uint32_t const uIoPortFirst = uIoPort;
383	uint32_t const uIoPortLast = uIoPortFirst + cbValue - 1;
384
385	/*
386	* Check hyper breakpoints first as the VMM debugger has priority over
387	* the guest.
388	*/
389	if (pVM->dbgf.s.cEnabledHwIoBreakpoints > 0)
390	for (unsigned iBp = 0; iBp < RT_ELEMENTS(pVM->dbgf.s.aHwBreakpoints); iBp++)
391	{
392	if ( pVM->dbgf.s.aHwBreakpoints[iBp].fType == X86_DR7_RW_IO
393	&& pVM->dbgf.s.aHwBreakpoints[iBp].fEnabled
394	&& pVM->dbgf.s.aHwBreakpoints[iBp].hBp != NIL_DBGFBP)
395	{
396	uint8_t cbReg = pVM->dbgf.s.aHwBreakpoints[iBp].cb; Assert(RT_IS_POWER_OF_TWO(cbReg));
397	uint64_t uDrXFirst = pVM->dbgf.s.aHwBreakpoints[iBp].GCPtr & ~(uint64_t)(cbReg - 1);
398	uint64_t uDrXLast = uDrXFirst + cbReg - 1;
399	if (uDrXFirst <= uIoPortLast && uDrXLast >= uIoPortFirst)
400	{
401	/* (See also DBGFRZTrap01Handler.) */
402	pVCpu->dbgf.s.hBpActive = pVM->dbgf.s.aHwBreakpoints[iBp].hBp;
403	pVCpu->dbgf.s.fSingleSteppingRaw = false;
404
405	LogFlow(("DBGFBpCheckIo2: hit hw breakpoint %d at %04x:%RGv (iop %#x L %u)\n",
406	iBp, pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, uIoPort, cbValue));
407	return CPUMCTX_DBG_DBGF_BP;
408	}
409	}
410	}
411
412	/*
413	* Check the guest.
414	*/
415	uint32_t const fDr7 = pVCpu->cpum.GstCtx.dr[7];
416	if ( (fDr7 & X86_DR7_ENABLED_MASK)
417	&& X86_DR7_ANY_RW_IO(fDr7)
418	&& (pVCpu->cpum.GstCtx.cr4 & X86_CR4_DE) )
419	{
420	uint32_t fEnabled = 0;
421	uint32_t fMatched = 0;
422	for (unsigned iBp = 0, uBpMask = 1; iBp < 4; iBp++, uBpMask <<= 1)
423	{
424	if (fDr7 & X86_DR7_L_G(iBp))
425	fEnabled \|= uBpMask;
426	if (X86_DR7_GET_RW(fDr7, iBp) == X86_DR7_RW_IO)
427	{
428	/* ASSUME the breakpoint and the I/O width qualifier uses the same encoding (1 2 x 4). */
429	static uint8_t const s_abInvAlign[4] = { 0, 1, 7, 3 };
430	uint8_t const cbInvAlign = s_abInvAlign[X86_DR7_GET_LEN(fDr7, iBp)];
431	uint64_t const uDrXFirst = pVCpu->cpum.GstCtx.dr[iBp] & ~(uint64_t)cbInvAlign;
432	uint64_t const uDrXLast = uDrXFirst + cbInvAlign;
433	if (uDrXFirst <= uIoPortLast && uDrXLast >= uIoPortFirst)
434	fMatched \|= uBpMask;
435	}
436	}
437	if (fEnabled & fMatched)
438	{
439	LogFlow(("DBGFBpCheckIo2: hit hw breakpoint %#x at %04x:%RGv (iop %#x L %u)\n",
440	fMatched, pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.rip, uIoPort, cbValue));
441	return fMatched << CPUMCTX_DBG_HIT_DRX_SHIFT;
442	}
443	}
444
445	return 0;
446	}
447	#endif /* VBOX_VMM_TARGET_ARMV8 */
448
449
450	/**
451	* Returns the single stepping state for a virtual CPU.
452	*
453	* @returns stepping (true) or not (false).
454	*
455	* @param pVCpu The cross context virtual CPU structure.
456	*/
457	VMM_INT_DECL(bool) DBGFIsStepping(PVMCPU pVCpu)
458	{
459	return pVCpu->dbgf.s.fSingleSteppingRaw;
460	}
461
462
463	/**
464	* Checks if the specified generic event is enabled or not.
465	*
466	* @returns true / false.
467	* @param pVM The cross context VM structure.
468	* @param enmEvent The generic event being raised.
469	* @param uEventArg The argument of that event.
470	*/
471	DECLINLINE(bool) dbgfEventIsGenericWithArgEnabled(PVM pVM, DBGFEVENTTYPE enmEvent, uint64_t uEventArg)
472	{
473	if (DBGF_IS_EVENT_ENABLED(pVM, enmEvent))
474	{
475	switch (enmEvent)
476	{
477	case DBGFEVENT_INTERRUPT_HARDWARE:
478	AssertReturn(uEventArg < 256, false);
479	return ASMBitTest(pVM->dbgf.s.bmHardIntBreakpoints, (uint32_t)uEventArg);
480
481	case DBGFEVENT_INTERRUPT_SOFTWARE:
482	AssertReturn(uEventArg < 256, false);
483	return ASMBitTest(pVM->dbgf.s.bmSoftIntBreakpoints, (uint32_t)uEventArg);
484
485	default:
486	return true;
487
488	}
489	}
490	return false;
491	}
492
493
494	/**
495	* Raises a generic debug event if enabled and not being ignored.
496	*
497	* @returns Strict VBox status code.
498	* @retval VINF_EM_DBG_EVENT if the event was raised and the caller should
499	* return ASAP to the debugger (via EM). We set VMCPU_FF_DBGF so, it
500	* is okay not to pass this along in some situations.
501	* @retval VINF_SUCCESS if the event was disabled or ignored.
502	*
503	* @param pVM The cross context VM structure.
504	* @param pVCpu The cross context virtual CPU structure.
505	* @param enmEvent The generic event being raised.
506	* @param enmCtx The context in which this event is being raised.
507	* @param cArgs Number of arguments (0 - 6).
508	* @param ... Event arguments.
509	*
510	* @thread EMT(pVCpu)
511	*/
512	VMM_INT_DECL(VBOXSTRICTRC) DBGFEventGenericWithArgs(PVM pVM, PVMCPU pVCpu, DBGFEVENTTYPE enmEvent, DBGFEVENTCTX enmCtx,
513	unsigned cArgs, ...)
514	{
515	Assert(cArgs < RT_ELEMENTS(pVCpu->dbgf.s.aEvents[0].Event.u.Generic.auArgs));
516
517	/*
518	* Is it enabled.
519	*/
520	va_list va;
521	va_start(va, cArgs);
522	uint64_t uEventArg0 = cArgs ? va_arg(va, uint64_t) : 0;
523	if (dbgfEventIsGenericWithArgEnabled(pVM, enmEvent, uEventArg0))
524	{
525	/*
526	* Any events on the stack. Should the incoming event be ignored?
527	*/
528	#if defined(VBOX_VMM_TARGET_ARMV8)
529	uint64_t const rip = CPUMGetGuestFlatPC(pVCpu); /* rip is a misnomer but saves us #ifdef's later on. */
530	#else
531	uint64_t const rip = CPUMGetGuestRIP(pVCpu);
532	#endif
533	uint32_t i = pVCpu->dbgf.s.cEvents;
534	if (i > 0)
535	{
536	while (i-- > 0)
537	{
538	if ( pVCpu->dbgf.s.aEvents[i].Event.enmType == enmEvent
539	&& pVCpu->dbgf.s.aEvents[i].enmState == DBGFEVENTSTATE_IGNORE
540	&& pVCpu->dbgf.s.aEvents[i].rip == rip)
541	{
542	pVCpu->dbgf.s.aEvents[i].enmState = DBGFEVENTSTATE_RESTORABLE;
543	va_end(va);
544	return VINF_SUCCESS;
545	}
546	Assert(pVCpu->dbgf.s.aEvents[i].enmState != DBGFEVENTSTATE_CURRENT);
547	}
548
549	/*
550	* Trim the event stack.
551	*/
552	i = pVCpu->dbgf.s.cEvents;
553	while (i-- > 0)
554	{
555	if ( pVCpu->dbgf.s.aEvents[i].rip == rip
556	&& ( pVCpu->dbgf.s.aEvents[i].enmState == DBGFEVENTSTATE_RESTORABLE
557	\|\| pVCpu->dbgf.s.aEvents[i].enmState == DBGFEVENTSTATE_IGNORE) )
558	pVCpu->dbgf.s.aEvents[i].enmState = DBGFEVENTSTATE_IGNORE;
559	else
560	{
561	if (i + 1 != pVCpu->dbgf.s.cEvents)
562	memmove(&pVCpu->dbgf.s.aEvents[i], &pVCpu->dbgf.s.aEvents[i + 1],
563	(pVCpu->dbgf.s.cEvents - i) * sizeof(pVCpu->dbgf.s.aEvents));
564	pVCpu->dbgf.s.cEvents--;
565	}
566	}
567
568	i = pVCpu->dbgf.s.cEvents;
569	AssertStmt(i < RT_ELEMENTS(pVCpu->dbgf.s.aEvents), i = RT_ELEMENTS(pVCpu->dbgf.s.aEvents) - 1);
570	}
571
572	/*
573	* Push the event.
574	*/
575	pVCpu->dbgf.s.aEvents[i].enmState = DBGFEVENTSTATE_CURRENT;
576	pVCpu->dbgf.s.aEvents[i].rip = rip;
577	pVCpu->dbgf.s.aEvents[i].Event.enmType = enmEvent;
578	pVCpu->dbgf.s.aEvents[i].Event.enmCtx = enmCtx;
579	pVCpu->dbgf.s.aEvents[i].Event.u.Generic.cArgs = cArgs;
580	pVCpu->dbgf.s.aEvents[i].Event.u.Generic.auArgs[0] = uEventArg0;
581	if (cArgs > 1)
582	{
583	AssertStmt(cArgs < RT_ELEMENTS(pVCpu->dbgf.s.aEvents[i].Event.u.Generic.auArgs),
584	cArgs = RT_ELEMENTS(pVCpu->dbgf.s.aEvents[i].Event.u.Generic.auArgs));
585	for (unsigned iArg = 1; iArg < cArgs; iArg++)
586	pVCpu->dbgf.s.aEvents[i].Event.u.Generic.auArgs[iArg] = va_arg(va, uint64_t);
587	}
588	pVCpu->dbgf.s.cEvents = i + 1;
589
590	VMCPU_FF_SET(pVCpu, VMCPU_FF_DBGF);
591	va_end(va);
592	return VINF_EM_DBG_EVENT;
593	}
594
595	va_end(va);
596	return VINF_SUCCESS;
597	}
598

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source: vbox/trunk/src/VBox/VMM/VMMAll/DBGFAll.cpp@ 104188

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