DBGFDisas.cpp@ 106952

Last change on this file since 106952 was 106743, checked in by vboxsync, 4 weeks ago
VMM/ARM: Make the control flow graph generator work with ARMv8 A64 to some extent, bugref:10393
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1	/* $Id: DBGFDisas.cpp 106743 2024-10-28 11:43:04Z vboxsync $ */
2	/** @file
3	* DBGF - Debugger Facility, Disassembler.
4	*/
5
6	/*
7	* Copyright (C) 2006-2024 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	#include <VBox/vmm/dbgf.h>
34	#include <VBox/vmm/selm.h>
35	#include <VBox/vmm/mm.h>
36	#include <VBox/vmm/hm.h>
37	#include <VBox/vmm/pgm.h>
38	#include <VBox/vmm/cpum.h>
39	#include "DBGFInternal.h"
40	#include <VBox/dis.h>
41	#include <VBox/err.h>
42	#include <VBox/param.h>
43	#include <VBox/vmm/vm.h>
44	#include <VBox/vmm/uvm.h>
45
46	#include <VBox/log.h>
47	#include <iprt/assert.h>
48	#include <iprt/string.h>
49	#include <iprt/alloca.h>
50	#include <iprt/ctype.h>
51
52
53	/*********************************************************************************************************************************
54	* Structures and Typedefs *
55	*********************************************************************************************************************************/
56	/**
57	* Structure used when disassembling and instructions in DBGF.
58	* This is used so the reader function can get the stuff it needs.
59	*/
60	typedef struct
61	{
62	/** The core structure. */
63	DISSTATE Dis;
64	/** The cross context VM structure. */
65	PVM pVM;
66	/** The cross context virtual CPU structure. */
67	PVMCPU pVCpu;
68	/** The address space for resolving symbol. */
69	RTDBGAS hDbgAs;
70	#if !defined(VBOX_VMM_TARGET_ARMV8)
71	/** Pointer to the first byte in the segment. */
72	RTGCUINTPTR GCPtrSegBase;
73	/** Pointer to the byte after the end of the segment. (might have wrapped!) */
74	RTGCUINTPTR GCPtrSegEnd;
75	/** The size of the segment minus 1. */
76	RTGCUINTPTR cbSegLimit;
77	#endif
78	/** The guest paging mode. */
79	PGMMODE enmMode;
80	/** Pointer to the current page - R3 Ptr. */
81	void const *pvPageR3;
82	/** Pointer to the current page - GC Ptr. */
83	RTGCPTR GCPtrPage;
84	/** Pointer to the next instruction (relative to GCPtrSegBase). */
85	RTGCUINTPTR GCPtrNext;
86	/** The lock information that PGMPhysReleasePageMappingLock needs. */
87	PGMPAGEMAPLOCK PageMapLock;
88	/** Whether the PageMapLock is valid or not. */
89	bool fLocked;
90	/** 64 bits mode or not. */
91	bool f64Bits;
92	} DBGFDISASSTATE, *PDBGFDISASSTATE;
93
94
95	/*********************************************************************************************************************************
96	* Internal Functions *
97	*********************************************************************************************************************************/
98	static FNDISREADBYTES dbgfR3DisasInstrRead;
99
100
101
102	/**
103	* Calls the disassembler with the proper reader functions and such for disa
104	*
105	* @returns VBox status code.
106	* @param pVM The cross context VM structure.
107	* @param pVCpu The cross context virtual CPU structure.
108	* @param pSelInfo The selector info.
109	* @param enmMode The guest paging mode.
110	* @param fFlags DBGF_DISAS_FLAGS_XXX.
111	* @param GCPtr The GC pointer (selector offset).
112	* @param pState The disas CPU state.
113	*/
114	static int dbgfR3DisasInstrFirst(PVM pVM, PVMCPU pVCpu, PDBGFSELINFO pSelInfo, PGMMODE enmMode,
115	RTGCPTR GCPtr, uint32_t fFlags, PDBGFDISASSTATE pState)
116	{
117	#if !defined(VBOX_VMM_TARGET_ARMV8)
118	pState->GCPtrSegBase = pSelInfo->GCPtrBase;
119	pState->GCPtrSegEnd = pSelInfo->cbLimit + 1 + (RTGCUINTPTR)pSelInfo->GCPtrBase;
120	pState->cbSegLimit = pSelInfo->cbLimit;
121	pState->f64Bits = enmMode >= PGMMODE_AMD64 && pSelInfo->u.Raw.Gen.u1Long;
122	#else
123	RT_NOREF(pSelInfo);
124
125	pState->f64Bits = CPUMGetGuestCodeBits(pVCpu) == 64;
126	#endif
127	pState->enmMode = enmMode;
128	pState->GCPtrPage = 0;
129	pState->pvPageR3 = NULL;
130	pState->hDbgAs = DBGF_AS_GLOBAL;
131	pState->pVM = pVM;
132	pState->pVCpu = pVCpu;
133	pState->fLocked = false;
134
135	DISCPUMODE enmCpuMode;
136	switch (fFlags & DBGF_DISAS_FLAGS_MODE_MASK)
137	{
138	default:
139	AssertFailed();
140	RT_FALL_THRU();
141	case DBGF_DISAS_FLAGS_DEFAULT_MODE:
142	enmCpuMode = CPUMGetGuestDisMode(pVCpu);
143	break;
144	#if !defined(VBOX_VMM_TARGET_ARMV8)
145	case DBGF_DISAS_FLAGS_16BIT_MODE:
146	case DBGF_DISAS_FLAGS_16BIT_REAL_MODE:
147	enmCpuMode = DISCPUMODE_16BIT;
148	break;
149	case DBGF_DISAS_FLAGS_32BIT_MODE:
150	enmCpuMode = DISCPUMODE_32BIT;
151	break;
152	case DBGF_DISAS_FLAGS_64BIT_MODE:
153	enmCpuMode = DISCPUMODE_64BIT;
154	break;
155	#else
156	case DBGF_DISAS_FLAGS_16BIT_MODE: /** @todo r=aeichner This is a bit abusive... */
157	case DBGF_DISAS_FLAGS_16BIT_REAL_MODE:
158	enmCpuMode = DISCPUMODE_ARMV8_T32;
159	break;
160	case DBGF_DISAS_FLAGS_32BIT_MODE:
161	enmCpuMode = DISCPUMODE_ARMV8_A32;
162	break;
163	case DBGF_DISAS_FLAGS_64BIT_MODE:
164	enmCpuMode = DISCPUMODE_ARMV8_A64;
165	break;
166	#endif
167	}
168
169	uint32_t cbInstr;
170	int rc = DISInstrWithReader(GCPtr,
171	enmCpuMode,
172	dbgfR3DisasInstrRead,
173	&pState->Dis,
174	&pState->Dis,
175	&cbInstr);
176	if (RT_SUCCESS(rc))
177	{
178	pState->GCPtrNext = GCPtr + cbInstr;
179	return VINF_SUCCESS;
180	}
181
182	/* cleanup */
183	if (pState->fLocked)
184	{
185	PGMPhysReleasePageMappingLock(pVM, &pState->PageMapLock);
186	pState->fLocked = false;
187	}
188	return rc;
189	}
190
191
192	#if 0
193	/**
194	* Calls the disassembler for disassembling the next instruction.
195	*
196	* @returns VBox status code.
197	* @param pState The disas CPU state.
198	*/
199	static int dbgfR3DisasInstrNext(PDBGFDISASSTATE pState)
200	{
201	uint32_t cbInstr;
202	int rc = DISInstr(&pState->Cpu, (void *)pState->GCPtrNext, 0, &cbInstr, NULL);
203	if (RT_SUCCESS(rc))
204	{
205	pState->GCPtrNext = GCPtr + cbInstr;
206	return VINF_SUCCESS;
207	}
208	return rc;
209	}
210	#endif
211
212
213	/**
214	* Done with the disassembler state, free associated resources.
215	*
216	* @param pState The disas CPU state ++.
217	*/
218	static void dbgfR3DisasInstrDone(PDBGFDISASSTATE pState)
219	{
220	if (pState->fLocked)
221	{
222	PGMPhysReleasePageMappingLock(pState->pVM, &pState->PageMapLock);
223	pState->fLocked = false;
224	}
225	}
226
227
228	/**
229	* @callback_method_impl{FNDISREADBYTES}
230	*
231	* @remarks The source is relative to the base address indicated by
232	* DBGFDISASSTATE::GCPtrSegBase.
233	*/
234	static DECLCALLBACK(int) dbgfR3DisasInstrRead(PDISSTATE pDis, uint8_t offInstr, uint8_t cbMinRead, uint8_t cbMaxRead)
235	{
236	PDBGFDISASSTATE pState = (PDBGFDISASSTATE)pDis;
237	for (;;)
238	{
239	#if !defined(VBOX_VMM_TARGET_ARMV8)
240	RTGCUINTPTR GCPtr = pDis->uInstrAddr + offInstr + pState->GCPtrSegBase;
241	#else
242	RTGCUINTPTR GCPtr = pDis->uInstrAddr + offInstr;
243	#endif
244
245	/*
246	* Need to update the page translation?
247	*/
248	if ( !pState->pvPageR3
249	\|\| (GCPtr >> GUEST_PAGE_SHIFT) != (pState->GCPtrPage >> GUEST_PAGE_SHIFT))
250	{
251	int rc = VINF_SUCCESS;
252
253	/* translate the address */
254	pState->GCPtrPage = GCPtr & ~(RTGCPTR)GUEST_PAGE_OFFSET_MASK;
255	if (pState->fLocked)
256	PGMPhysReleasePageMappingLock(pState->pVM, &pState->PageMapLock);
257	if (PGMMODE_WITH_PAGING(pState->enmMode))
258	rc = PGMPhysGCPtr2CCPtrReadOnly(pState->pVCpu, pState->GCPtrPage, &pState->pvPageR3, &pState->PageMapLock);
259	else
260	rc = PGMPhysGCPhys2CCPtrReadOnly(pState->pVM, pState->GCPtrPage, &pState->pvPageR3, &pState->PageMapLock);
261	if (RT_SUCCESS(rc))
262	pState->fLocked = true;
263	else
264	{
265	pState->fLocked = false;
266	pState->pvPageR3 = NULL;
267	return rc;
268	}
269	}
270
271	uint32_t cb = GUEST_PAGE_SIZE - (GCPtr & GUEST_PAGE_OFFSET_MASK);
272	#if !defined(VBOX_VMM_TARGET_ARMV8)
273	/*
274	* Check the segment limit.
275	*/
276	if (!pState->f64Bits && pDis->uInstrAddr + offInstr > pState->cbSegLimit)
277	return VERR_OUT_OF_SELECTOR_BOUNDS;
278
279	/*
280	* Calc how much we can read, maxing out the read.
281	*/
282	if (!pState->f64Bits)
283	{
284	RTGCUINTPTR cbSeg = pState->GCPtrSegEnd - GCPtr;
285	if (cb > cbSeg && cbSeg)
286	cb = cbSeg;
287	}
288	#endif
289	if (cb > cbMaxRead)
290	cb = cbMaxRead;
291
292	/*
293	* Read and advance,
294	*/
295	memcpy(&pDis->Instr.ab[offInstr], (char *)pState->pvPageR3 + (GCPtr & GUEST_PAGE_OFFSET_MASK), cb);
296	offInstr += (uint8_t)cb;
297	if (cb >= cbMinRead)
298	{
299	pDis->cbCachedInstr = offInstr;
300	return VINF_SUCCESS;
301	}
302	cbMaxRead -= (uint8_t)cb;
303	cbMinRead -= (uint8_t)cb;
304	}
305	}
306
307
308	/**
309	* @callback_method_impl{FNDISGETSYMBOL}
310	*/
311	static DECLCALLBACK(int) dbgfR3DisasGetSymbol(PCDISSTATE pDis, uint32_t u32Sel, RTUINTPTR uAddress,
312	char pszBuf, size_t cchBuf, RTINTPTR poff, void *pvUser)
313	{
314	PDBGFDISASSTATE pState = (PDBGFDISASSTATE)pDis;
315	PCDBGFSELINFO pSelInfo = (PCDBGFSELINFO)pvUser;
316
317	/*
318	* Address conversion
319	*/
320	DBGFADDRESS Addr;
321	int rc;
322	#if !defined(VBOX_VMM_TARGET_ARMV8)
323	/* Start with CS. */
324	if ( DIS_FMT_SEL_IS_REG(u32Sel)
325	? DIS_FMT_SEL_GET_REG(u32Sel) == DISSELREG_CS
326	: pSelInfo->Sel == DIS_FMT_SEL_GET_VALUE(u32Sel))
327	rc = DBGFR3AddrFromSelInfoOff(pState->pVM->pUVM, &Addr, pSelInfo, uAddress);
328	/* In long mode everything but FS and GS is easy. */
329	else if ( pState->Dis.uCpuMode == DISCPUMODE_64BIT
330	&& DIS_FMT_SEL_IS_REG(u32Sel)
331	&& DIS_FMT_SEL_GET_REG(u32Sel) != DISSELREG_GS
332	&& DIS_FMT_SEL_GET_REG(u32Sel) != DISSELREG_FS)
333	{
334	DBGFR3AddrFromFlat(pState->pVM->pUVM, &Addr, uAddress);
335	rc = VINF_SUCCESS;
336	}
337	/* Here's a quick hack to catch patch manager SS relative access. */
338	else if ( DIS_FMT_SEL_IS_REG(u32Sel)
339	&& DIS_FMT_SEL_GET_REG(u32Sel) == DISSELREG_SS
340	&& pSelInfo->GCPtrBase == 0
341	&& pSelInfo->cbLimit >= UINT32_MAX)
342	{
343	DBGFR3AddrFromFlat(pState->pVM->pUVM, &Addr, uAddress);
344	rc = VINF_SUCCESS;
345	}
346	else
347	{
348	/** @todo implement a generic solution here. */
349	rc = VERR_SYMBOL_NOT_FOUND;
350	}
351	#else
352	RT_NOREF(pSelInfo, u32Sel);
353
354	DBGFR3AddrFromFlat(pState->pVM->pUVM, &Addr, uAddress);
355	rc = VINF_SUCCESS;
356	#endif
357
358	/*
359	* If we got an address, try resolve it into a symbol.
360	*/
361	if (RT_SUCCESS(rc))
362	{
363	RTDBGSYMBOL Sym;
364	RTGCINTPTR off;
365	rc = DBGFR3AsSymbolByAddr(pState->pVM->pUVM, pState->hDbgAs, &Addr,
366	RTDBGSYMADDR_FLAGS_LESS_OR_EQUAL \| RTDBGSYMADDR_FLAGS_SKIP_ABS_IN_DEFERRED,
367	&off, &Sym, NULL /phMod/);
368	if (RT_SUCCESS(rc))
369	{
370	/*
371	* Return the symbol and offset.
372	*/
373	size_t cchName = strlen(Sym.szName);
374	if (cchName >= cchBuf)
375	cchName = cchBuf - 1;
376	memcpy(pszBuf, Sym.szName, cchName);
377	pszBuf[cchName] = '\0';
378
379	*poff = off;
380	}
381	}
382	return rc;
383	}
384
385
386	/**
387	* Disassembles the one instruction according to the specified flags and
388	* address, internal worker executing on the EMT of the specified virtual CPU.
389	*
390	* @returns VBox status code.
391	* @param pVM The cross context VM structure.
392	* @param pVCpu The cross context virtual CPU structure.
393	* @param Sel The code selector. This used to determine the 32/16 bit ness and
394	* calculation of the actual instruction address.
395	* @param pGCPtr Pointer to the variable holding the code address
396	* relative to the base of Sel.
397	* @param fFlags Flags controlling where to start and how to format.
398	* A combination of the DBGF_DISAS_FLAGS_* \#defines.
399	* @param pszOutput Output buffer.
400	* @param cbOutput Size of the output buffer.
401	* @param pcbInstr Where to return the size of the instruction.
402	* @param pDisState Where to store the disassembler state into.
403	*/
404	static DECLCALLBACK(int)
405	dbgfR3DisasInstrExOnVCpu(PVM pVM, PVMCPU pVCpu, RTSEL Sel, PRTGCPTR pGCPtr, uint32_t fFlags,
406	char pszOutput, uint32_t cbOutput, uint32_t pcbInstr, PDBGFDISSTATE pDisState)
407	{
408	VMCPU_ASSERT_EMT(pVCpu);
409	RTGCPTR GCPtr = *pGCPtr;
410	int rc;
411
412	#if defined(VBOX_VMM_TARGET_ARMV8)
413	DBGFSELINFO SelInfo; RT_ZERO(SelInfo);
414	const PGMMODE enmMode = PGMGetGuestMode(pVCpu);
415	const bool fRealModeAddress = false;
416	if (fFlags & DBGF_DISAS_FLAGS_CURRENT_GUEST)
417	GCPtr = CPUMGetGuestFlatPC(pVCpu);
418	#else
419	/*
420	* Get the Sel and GCPtr if fFlags requests that.
421	*/
422	PCCPUMCTX pCtx = CPUMQueryGuestCtxPtr(pVCpu);
423	PCCPUMSELREG pSRegCS = NULL;
424	if (fFlags & DBGF_DISAS_FLAGS_CURRENT_GUEST)
425	{
426	Sel = pCtx->cs.Sel;
427	pSRegCS = &pCtx->cs;
428	GCPtr = pCtx->rip;
429	}
430	/*
431	* Check if the selector matches the guest CS, use the hidden
432	* registers from that if they are valid. Saves time and effort.
433	*/
434	else
435	{
436	if (pCtx->cs.Sel == Sel && Sel != DBGF_SEL_FLAT)
437	pSRegCS = &pCtx->cs;
438	else
439	pCtx = NULL;
440	}
441
442	/*
443	* Read the selector info - assume no stale selectors and nasty stuff like that.
444	*
445	* Note! We CANNOT load invalid hidden selector registers since that would
446	* mean that log/debug statements or the debug will influence the
447	* guest state and make things behave differently.
448	*/
449	DBGFSELINFO SelInfo;
450	const PGMMODE enmMode = PGMGetGuestMode(pVCpu);
451	bool fRealModeAddress = false;
452
453	if ( pSRegCS
454	&& CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, pSRegCS))
455	{
456	SelInfo.Sel = Sel;
457	SelInfo.SelGate = 0;
458	SelInfo.GCPtrBase = pSRegCS->u64Base;
459	SelInfo.cbLimit = pSRegCS->u32Limit;
460	SelInfo.fFlags = PGMMODE_IS_64BIT_MODE(enmMode)
461	? DBGFSELINFO_FLAGS_LONG_MODE
462	: enmMode != PGMMODE_REAL && !pCtx->eflags.Bits.u1VM
463	? DBGFSELINFO_FLAGS_PROT_MODE
464	: DBGFSELINFO_FLAGS_REAL_MODE;
465
466	SelInfo.u.Raw.au32[0] = 0;
467	SelInfo.u.Raw.au32[1] = 0;
468	SelInfo.u.Raw.Gen.u16LimitLow = 0xffff;
469	SelInfo.u.Raw.Gen.u4LimitHigh = 0xf;
470	SelInfo.u.Raw.Gen.u1Present = pSRegCS->Attr.n.u1Present;
471	SelInfo.u.Raw.Gen.u1Granularity = pSRegCS->Attr.n.u1Granularity;;
472	SelInfo.u.Raw.Gen.u1DefBig = pSRegCS->Attr.n.u1DefBig;
473	SelInfo.u.Raw.Gen.u1Long = pSRegCS->Attr.n.u1Long;
474	SelInfo.u.Raw.Gen.u1DescType = pSRegCS->Attr.n.u1DescType;
475	SelInfo.u.Raw.Gen.u4Type = pSRegCS->Attr.n.u4Type;
476	fRealModeAddress = !!(SelInfo.fFlags & DBGFSELINFO_FLAGS_REAL_MODE);
477	}
478	else if (Sel == DBGF_SEL_FLAT)
479	{
480	SelInfo.Sel = Sel;
481	SelInfo.SelGate = 0;
482	SelInfo.GCPtrBase = 0;
483	SelInfo.cbLimit = ~(RTGCUINTPTR)0;
484	SelInfo.fFlags = PGMMODE_IS_64BIT_MODE(enmMode)
485	? DBGFSELINFO_FLAGS_LONG_MODE
486	: enmMode != PGMMODE_REAL
487	? DBGFSELINFO_FLAGS_PROT_MODE
488	: DBGFSELINFO_FLAGS_REAL_MODE;
489	SelInfo.u.Raw.au32[0] = 0;
490	SelInfo.u.Raw.au32[1] = 0;
491	SelInfo.u.Raw.Gen.u16LimitLow = 0xffff;
492	SelInfo.u.Raw.Gen.u4LimitHigh = 0xf;
493
494	pSRegCS = &CPUMQueryGuestCtxPtr(pVCpu)->cs;
495	if (CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, pSRegCS))
496	{
497	/* Assume the current CS defines the execution mode. */
498	SelInfo.u.Raw.Gen.u1Present = pSRegCS->Attr.n.u1Present;
499	SelInfo.u.Raw.Gen.u1Granularity = pSRegCS->Attr.n.u1Granularity;;
500	SelInfo.u.Raw.Gen.u1DefBig = pSRegCS->Attr.n.u1DefBig;
501	SelInfo.u.Raw.Gen.u1Long = pSRegCS->Attr.n.u1Long;
502	SelInfo.u.Raw.Gen.u1DescType = pSRegCS->Attr.n.u1DescType;
503	SelInfo.u.Raw.Gen.u4Type = pSRegCS->Attr.n.u4Type;
504	}
505	else
506	{
507	pSRegCS = NULL;
508	SelInfo.u.Raw.Gen.u1Present = 1;
509	SelInfo.u.Raw.Gen.u1Granularity = 1;
510	SelInfo.u.Raw.Gen.u1DefBig = 1;
511	SelInfo.u.Raw.Gen.u1DescType = 1;
512	SelInfo.u.Raw.Gen.u4Type = X86_SEL_TYPE_EO;
513	}
514	}
515	else if ( (pCtx && pCtx->eflags.Bits.u1VM)
516	\|\| enmMode == PGMMODE_REAL
517	\|\| (fFlags & DBGF_DISAS_FLAGS_MODE_MASK) == DBGF_DISAS_FLAGS_16BIT_REAL_MODE)
518	{ /* V86 mode or real mode - real mode addressing */
519	SelInfo.Sel = Sel;
520	SelInfo.SelGate = 0;
521	SelInfo.GCPtrBase = Sel * 16;
522	SelInfo.cbLimit = ~(RTGCUINTPTR)0;
523	SelInfo.fFlags = DBGFSELINFO_FLAGS_REAL_MODE;
524	SelInfo.u.Raw.au32[0] = 0;
525	SelInfo.u.Raw.au32[1] = 0;
526	SelInfo.u.Raw.Gen.u16LimitLow = 0xffff;
527	SelInfo.u.Raw.Gen.u4LimitHigh = 0xf;
528	SelInfo.u.Raw.Gen.u1Present = 1;
529	SelInfo.u.Raw.Gen.u1Granularity = 1;
530	SelInfo.u.Raw.Gen.u1DefBig = 0; /* 16 bits */
531	SelInfo.u.Raw.Gen.u1DescType = 1;
532	SelInfo.u.Raw.Gen.u4Type = X86_SEL_TYPE_EO;
533	fRealModeAddress = true;
534	}
535	else
536	{
537	rc = SELMR3GetSelectorInfo(pVCpu, Sel, &SelInfo);
538	if (RT_FAILURE(rc))
539	{
540	RTStrPrintf(pszOutput, cbOutput, "Sel=%04x -> %Rrc\n", Sel, rc);
541	return rc;
542	}
543	}
544	#endif
545
546	/*
547	* Disassemble it.
548	*/
549	DBGFDISASSTATE State;
550	rc = dbgfR3DisasInstrFirst(pVM, pVCpu, &SelInfo, enmMode, GCPtr, fFlags, &State);
551	if (RT_FAILURE(rc))
552	{
553	if (State.Dis.cbCachedInstr)
554	RTStrPrintf(pszOutput, cbOutput, "Disas -> %Rrc; %.*Rhxs\n", rc, (size_t)State.Dis.cbCachedInstr, State.Dis.Instr.ab);
555	else
556	RTStrPrintf(pszOutput, cbOutput, "Disas -> %Rrc\n", rc);
557	return rc;
558	}
559
560	/*
561	* Format it.
562	*/
563	char szBuf[512];
564	#if defined(VBOX_VMM_TARGET_ARMV8)
565	DISFormatArmV8Ex(&State.Dis, szBuf, sizeof(szBuf),
566	DIS_FMT_FLAGS_RELATIVE_BRANCH,
567	fFlags & DBGF_DISAS_FLAGS_NO_SYMBOLS ? NULL : dbgfR3DisasGetSymbol,
568	NULL);
569	#else
570	DISFormatYasmEx(&State.Dis, szBuf, sizeof(szBuf),
571	DIS_FMT_FLAGS_RELATIVE_BRANCH,
572	fFlags & DBGF_DISAS_FLAGS_NO_SYMBOLS ? NULL : dbgfR3DisasGetSymbol,
573	&SelInfo);
574	#endif
575
576	/*
577	* Print it to the user specified buffer.
578	*/
579	size_t cch;
580	if (fFlags & DBGF_DISAS_FLAGS_NO_BYTES)
581	{
582	if (fFlags & DBGF_DISAS_FLAGS_NO_ADDRESS)
583	cch = RTStrPrintf(pszOutput, cbOutput, "%s", szBuf);
584	else if (fRealModeAddress)
585	cch = RTStrPrintf(pszOutput, cbOutput, "%04x:%04x %s", Sel, (unsigned)GCPtr, szBuf);
586	else if (Sel == DBGF_SEL_FLAT)
587	{
588	if (PGMMODE_IS_64BIT_MODE(enmMode))
589	cch = RTStrPrintf(pszOutput, cbOutput, "%RGv %s", GCPtr, szBuf);
590	else
591	cch = RTStrPrintf(pszOutput, cbOutput, "%08RX32 %s", (uint32_t)GCPtr, szBuf);
592	}
593	else
594	{
595	if (PGMMODE_IS_64BIT_MODE(enmMode))
596	cch = RTStrPrintf(pszOutput, cbOutput, "%04x:%RGv %s", Sel, GCPtr, szBuf);
597	else
598	cch = RTStrPrintf(pszOutput, cbOutput, "%04x:%08RX32 %s", Sel, (uint32_t)GCPtr, szBuf);
599	}
600	}
601	else
602	{
603	uint32_t cbInstr = State.Dis.cbInstr;
604	uint8_t const *pabInstr = State.Dis.Instr.ab;
605	if (fFlags & DBGF_DISAS_FLAGS_NO_ADDRESS)
606	cch = RTStrPrintf(pszOutput, cbOutput, "%.Rhxs%s %s",
607	cbInstr, pabInstr, cbInstr < 8 ? (8 - cbInstr) * 3 : 0, "",
608	szBuf);
609	else if (fRealModeAddress)
610	cch = RTStrPrintf(pszOutput, cbOutput, "%04x:%04x %.Rhxs%s %s",
611	Sel, (unsigned)GCPtr,
612	cbInstr, pabInstr, cbInstr < 8 ? (8 - cbInstr) * 3 : 0, "",
613	szBuf);
614	else if (Sel == DBGF_SEL_FLAT)
615	{
616	if (PGMMODE_IS_64BIT_MODE(enmMode))
617	cch = RTStrPrintf(pszOutput, cbOutput, "%RGv %.Rhxs%s %s",
618	GCPtr,
619	cbInstr, pabInstr, cbInstr < 8 ? (8 - cbInstr) * 3 : 0, "",
620	szBuf);
621	else
622	cch = RTStrPrintf(pszOutput, cbOutput, "%08RX32 %.Rhxs%s %s",
623	(uint32_t)GCPtr,
624	cbInstr, pabInstr, cbInstr < 8 ? (8 - cbInstr) * 3 : 0, "",
625	szBuf);
626	}
627	else
628	{
629	if (PGMMODE_IS_64BIT_MODE(enmMode))
630	cch = RTStrPrintf(pszOutput, cbOutput, "%04x:%RGv %.Rhxs%s %s",
631	Sel, GCPtr,
632	cbInstr, pabInstr, cbInstr < 8 ? (8 - cbInstr) * 3 : 0, "",
633	szBuf);
634	else
635	cch = RTStrPrintf(pszOutput, cbOutput, "%04x:%08RX32 %.Rhxs%s %s",
636	Sel, (uint32_t)GCPtr,
637	cbInstr, pabInstr, cbInstr < 8 ? (8 - cbInstr) * 3 : 0, "",
638	szBuf);
639	}
640	}
641
642	if (pcbInstr)
643	*pcbInstr = State.Dis.cbInstr;
644
645	if (pDisState)
646	{
647	pDisState->pCurInstr = State.Dis.pCurInstr;
648	pDisState->cbInstr = State.Dis.cbInstr;
649	pDisState->Param1 = State.Dis.aParams[0];
650	pDisState->Param2 = State.Dis.aParams[1];
651	pDisState->Param3 = State.Dis.aParams[2];
652	pDisState->Param4 = State.Dis.aParams[3];
653	#if defined(VBOX_VMM_TARGET_ARMV8)
654	memcpy(&pDisState->armv8, &State.Dis.armv8, sizeof(State.Dis.armv8));
655	#else
656	memcpy(&pDisState->x86, &State.Dis.x86, sizeof(State.Dis.x86));
657	#endif
658	}
659
660	dbgfR3DisasInstrDone(&State);
661	return VINF_SUCCESS;
662	}
663
664
665	/**
666	* Disassembles the one instruction according to the specified flags and address
667	* returning part of the disassembler state.
668	*
669	* @returns VBox status code.
670	* @param pUVM The user mode VM handle.
671	* @param idCpu The ID of virtual CPU.
672	* @param pAddr The code address.
673	* @param fFlags Flags controlling where to start and how to format.
674	* A combination of the DBGF_DISAS_FLAGS_* \#defines.
675	* @param pszOutput Output buffer. This will always be properly
676	* terminated if @a cbOutput is greater than zero.
677	* @param cbOutput Size of the output buffer.
678	* @param pDisState The disassembler state to fill in.
679	*
680	* @remarks May have to switch to the EMT of the virtual CPU in order to do
681	* address conversion.
682	*/
683	DECLHIDDEN(int) dbgfR3DisasInstrStateEx(PUVM pUVM, VMCPUID idCpu, PDBGFADDRESS pAddr, uint32_t fFlags,
684	char *pszOutput, uint32_t cbOutput, PDBGFDISSTATE pDisState)
685	{
686	AssertReturn(cbOutput > 0, VERR_INVALID_PARAMETER);
687	*pszOutput = '\0';
688	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
689	PVM pVM = pUVM->pVM;
690	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
691	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_CPU_ID);
692	AssertReturn(!(fFlags & ~DBGF_DISAS_FLAGS_VALID_MASK), VERR_INVALID_PARAMETER);
693	AssertReturn((fFlags & DBGF_DISAS_FLAGS_MODE_MASK) <= DBGF_DISAS_FLAGS_64BIT_MODE, VERR_INVALID_PARAMETER);
694
695	/*
696	* Optimize the common case where we're called on the EMT of idCpu since
697	* we're using this all the time when logging.
698	*/
699	int rc;
700	PVMCPU pVCpu = VMMGetCpu(pVM);
701	if ( pVCpu
702	&& pVCpu->idCpu == idCpu)
703	rc = dbgfR3DisasInstrExOnVCpu(pVM, pVCpu, pAddr->Sel, &pAddr->off, fFlags, pszOutput, cbOutput, NULL, pDisState);
704	else
705	rc = VMR3ReqPriorityCallWait(pVM, idCpu, (PFNRT)dbgfR3DisasInstrExOnVCpu, 9,
706	pVM, VMMGetCpuById(pVM, idCpu), pAddr->Sel, &pAddr->off, fFlags,
707	pszOutput, cbOutput, NULL, pDisState);
708	return rc;
709	}
710
711	/**
712	* Disassembles the one instruction according to the specified flags and address.
713	*
714	* @returns VBox status code.
715	* @param pUVM The user mode VM handle.
716	* @param idCpu The ID of virtual CPU.
717	* @param Sel The code selector. This used to determine the 32/16 bit ness and
718	* calculation of the actual instruction address.
719	* @param GCPtr The code address relative to the base of Sel.
720	* @param fFlags Flags controlling where to start and how to format.
721	* A combination of the DBGF_DISAS_FLAGS_* \#defines.
722	* @param pszOutput Output buffer. This will always be properly
723	* terminated if @a cbOutput is greater than zero.
724	* @param cbOutput Size of the output buffer.
725	* @param pcbInstr Where to return the size of the instruction.
726	*
727	* @remarks May have to switch to the EMT of the virtual CPU in order to do
728	* address conversion.
729	*/
730	VMMR3DECL(int) DBGFR3DisasInstrEx(PUVM pUVM, VMCPUID idCpu, RTSEL Sel, RTGCPTR GCPtr, uint32_t fFlags,
731	char pszOutput, uint32_t cbOutput, uint32_t pcbInstr)
732	{
733	AssertReturn(cbOutput > 0, VERR_INVALID_PARAMETER);
734	*pszOutput = '\0';
735	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
736	PVM pVM = pUVM->pVM;
737	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
738	AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_CPU_ID);
739	AssertReturn(!(fFlags & ~DBGF_DISAS_FLAGS_VALID_MASK), VERR_INVALID_PARAMETER);
740	AssertReturn((fFlags & DBGF_DISAS_FLAGS_MODE_MASK) <= DBGF_DISAS_FLAGS_64BIT_MODE, VERR_INVALID_PARAMETER);
741
742	/*
743	* Optimize the common case where we're called on the EMT of idCpu since
744	* we're using this all the time when logging.
745	*/
746	int rc;
747	PVMCPU pVCpu = VMMGetCpu(pVM);
748	if ( pVCpu
749	&& pVCpu->idCpu == idCpu)
750	rc = dbgfR3DisasInstrExOnVCpu(pVM, pVCpu, Sel, &GCPtr, fFlags, pszOutput, cbOutput, pcbInstr, NULL);
751	else
752	rc = VMR3ReqPriorityCallWait(pVM, idCpu, (PFNRT)dbgfR3DisasInstrExOnVCpu, 9,
753	pVM, VMMGetCpuById(pVM, idCpu), Sel, &GCPtr, fFlags, pszOutput, cbOutput, pcbInstr, NULL);
754	return rc;
755	}
756
757
758	/**
759	* Disassembles the current guest context instruction.
760	* All registers and data will be displayed. Addresses will be attempted resolved to symbols.
761	*
762	* @returns VBox status code.
763	* @param pVCpu The cross context virtual CPU structure.
764	* @param pszOutput Output buffer. This will always be properly
765	* terminated if @a cbOutput is greater than zero.
766	* @param cbOutput Size of the output buffer.
767	* @thread EMT(pVCpu)
768	*/
769	VMMR3_INT_DECL(int) DBGFR3DisasInstrCurrent(PVMCPU pVCpu, char *pszOutput, uint32_t cbOutput)
770	{
771	AssertReturn(cbOutput > 0, VERR_INVALID_PARAMETER);
772	*pszOutput = '\0';
773	Assert(VMCPU_IS_EMT(pVCpu));
774
775	RTGCPTR GCPtr = 0;
776	return dbgfR3DisasInstrExOnVCpu(pVCpu->pVMR3, pVCpu, 0, &GCPtr,
777	DBGF_DISAS_FLAGS_CURRENT_GUEST \| DBGF_DISAS_FLAGS_DEFAULT_MODE
778	\| DBGF_DISAS_FLAGS_ANNOTATE_PATCHED,
779	pszOutput, cbOutput, NULL, NULL);
780	}
781
782
783	/**
784	* Disassembles the current guest context instruction and writes it to the log.
785	* All registers and data will be displayed. Addresses will be attempted resolved to symbols.
786	*
787	* @returns VBox status code.
788	* @param pVCpu The cross context virtual CPU structure.
789	* @param pszPrefix Short prefix string to the disassembly string. (optional)
790	* @thread EMT(pVCpu)
791	*/
792	VMMR3DECL(int) DBGFR3DisasInstrCurrentLogInternal(PVMCPU pVCpu, const char *pszPrefix)
793	{
794	char szBuf[256];
795	szBuf[0] = '\0';
796	int rc = DBGFR3DisasInstrCurrent(pVCpu, &szBuf[0], sizeof(szBuf));
797	if (RT_FAILURE(rc))
798	RTStrPrintf(szBuf, sizeof(szBuf), "DBGFR3DisasInstrCurrentLog failed with rc=%Rrc\n", rc);
799	if (pszPrefix && *pszPrefix)
800	{
801	if (pVCpu->CTX_SUFF(pVM)->cCpus > 1)
802	RTLogPrintf("%s-CPU%u: %s\n", pszPrefix, pVCpu->idCpu, szBuf);
803	else
804	RTLogPrintf("%s: %s\n", pszPrefix, szBuf);
805	}
806	else
807	RTLogPrintf("%s\n", szBuf);
808	return rc;
809	}
810
811
812
813	/**
814	* Disassembles the specified guest context instruction and writes it to the log.
815	* Addresses will be attempted resolved to symbols.
816	*
817	* @returns VBox status code.
818	* @param pVCpu The cross context virtual CPU structure of the calling
819	* EMT.
820	* @param Sel The code selector. This used to determine the 32/16
821	* bit-ness and calculation of the actual instruction
822	* address.
823	* @param GCPtr The code address relative to the base of Sel.
824	* @param pszPrefix Short prefix string to the disassembly string.
825	* (optional)
826	* @thread EMT(pVCpu)
827	*/
828	VMMR3DECL(int) DBGFR3DisasInstrLogInternal(PVMCPU pVCpu, RTSEL Sel, RTGCPTR GCPtr, const char *pszPrefix)
829	{
830	Assert(VMCPU_IS_EMT(pVCpu));
831
832	char szBuf[256];
833	RTGCPTR GCPtrTmp = GCPtr;
834	int rc = dbgfR3DisasInstrExOnVCpu(pVCpu->pVMR3, pVCpu, Sel, &GCPtrTmp, DBGF_DISAS_FLAGS_DEFAULT_MODE,
835	&szBuf[0], sizeof(szBuf), NULL, NULL);
836	if (RT_FAILURE(rc))
837	RTStrPrintf(szBuf, sizeof(szBuf), "DBGFR3DisasInstrLog(, %RTsel, %RGv) failed with rc=%Rrc\n", Sel, GCPtr, rc);
838	if (pszPrefix && *pszPrefix)
839	{
840	if (pVCpu->CTX_SUFF(pVM)->cCpus > 1)
841	RTLogPrintf("%s-CPU%u: %s\n", pszPrefix, pVCpu->idCpu, szBuf);
842	else
843	RTLogPrintf("%s: %s\n", pszPrefix, szBuf);
844	}
845	else
846	RTLogPrintf("%s\n", szBuf);
847	return rc;
848	}
849

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source: vbox/trunk/src/VBox/VMM/VMMR3/DBGFDisas.cpp@ 106952

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