DBGFDisas.cpp@ 12923

Last change on this file since 12923 was 12677, checked in by vboxsync, 16 years ago
DBGF file headers.
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1	/* $Id: DBGFDisas.cpp 12677 2008-09-24 07:19:03Z vboxsync $ */
2	/** @file
3	* DBGF - Debugger Facility, Disassembler.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
20	*/
21
22	/*******************************************************************************
23	* Header Files *
24	*******************************************************************************/
25	#define LOG_GROUP LOG_GROUP_DBGF
26	#include <VBox/dbgf.h>
27	#include <VBox/selm.h>
28	#include <VBox/mm.h>
29	#include <VBox/pgm.h>
30	#include <VBox/cpum.h>
31	#include "DBGFInternal.h"
32	#include <VBox/dis.h>
33	#include <VBox/err.h>
34	#include <VBox/param.h>
35
36	#include <VBox/log.h>
37	#include <iprt/assert.h>
38	#include <iprt/string.h>
39	#include <iprt/alloca.h>
40	#include <iprt/ctype.h>
41
42
43	/*******************************************************************************
44	* Structures and Typedefs *
45	*******************************************************************************/
46	/**
47	* Structure used when disassembling and instructions in DBGF.
48	* This is used so the reader function can get the stuff it needs.
49	*/
50	typedef struct
51	{
52	/** The core structure. */
53	DISCPUSTATE Cpu;
54	/** The VM handle. */
55	PVM pVM;
56	/** Pointer to the first byte in the segemnt. */
57	RTGCUINTPTR GCPtrSegBase;
58	/** Pointer to the byte after the end of the segment. (might have wrapped!) */
59	RTGCUINTPTR GCPtrSegEnd;
60	/** The size of the segment minus 1. */
61	RTGCUINTPTR cbSegLimit;
62	/** The guest paging mode. */
63	PGMMODE enmMode;
64	/** Pointer to the current page - HC Ptr. */
65	void const *pvPageHC;
66	/** Pointer to the current page - GC Ptr. */
67	RTGCPTR pvPageGC;
68	/** Pointer to the next instruction (relative to GCPtrSegBase). */
69	RTGCUINTPTR GCPtrNext;
70	/** The lock information that PGMPhysReleasePageMappingLock needs. */
71	PGMPAGEMAPLOCK PageMapLock;
72	/** Whether the PageMapLock is valid or not. */
73	bool fLocked;
74	/** 64 bits mode or not. */
75	bool f64Bits;
76	} DBGFDISASSTATE, *PDBGFDISASSTATE;
77
78
79	/*******************************************************************************
80	* Internal Functions *
81	*******************************************************************************/
82	static DECLCALLBACK(int) dbgfR3DisasInstrRead(RTUINTPTR pSrc, uint8_t pDest, uint32_t size, void pvUserdata);
83
84
85
86	/**
87	* Calls the dissassembler with the proper reader functions and such for disa
88	*
89	* @returns VBox status code.
90	* @param pVM VM handle
91	* @param pSelInfo The selector info.
92	* @param enmMode The guest paging mode.
93	* @param GCPtr The GC pointer (selector offset).
94	* @param pState The disas CPU state.
95	*/
96	static int dbgfR3DisasInstrFirst(PVM pVM, PSELMSELINFO pSelInfo, PGMMODE enmMode, RTGCPTR GCPtr, PDBGFDISASSTATE pState)
97	{
98	pState->GCPtrSegBase = pSelInfo->GCPtrBase;
99	pState->GCPtrSegEnd = pSelInfo->cbLimit + 1 + (RTGCUINTPTR)pSelInfo->GCPtrBase;
100	pState->cbSegLimit = pSelInfo->cbLimit;
101	pState->enmMode = enmMode;
102	pState->pvPageGC = 0;
103	pState->pvPageHC = NULL;
104	pState->pVM = pVM;
105	pState->fLocked = false;
106	pState->f64Bits = enmMode >= PGMMODE_AMD64 && pSelInfo->Raw.Gen.u1Long;
107	Assert((uintptr_t)GCPtr == GCPtr);
108	uint32_t cbInstr;
109	int rc = DISCoreOneEx(GCPtr,
110	pState->f64Bits
111	? CPUMODE_64BIT
112	: pSelInfo->Raw.Gen.u1DefBig
113	? CPUMODE_32BIT
114	: CPUMODE_16BIT,
115	dbgfR3DisasInstrRead,
116	&pState->Cpu,
117	&pState->Cpu,
118	&cbInstr);
119	if (VBOX_SUCCESS(rc))
120	{
121	pState->GCPtrNext = GCPtr + cbInstr;
122	return VINF_SUCCESS;
123	}
124
125	/* cleanup */
126	if (pState->fLocked)
127	{
128	PGMPhysReleasePageMappingLock(pVM, &pState->PageMapLock);
129	pState->fLocked = false;
130	}
131	return rc;
132	}
133
134
135	#if 0
136	/**
137	* Calls the dissassembler for disassembling the next instruction.
138	*
139	* @returns VBox status code.
140	* @param pState The disas CPU state.
141	*/
142	static int dbgfR3DisasInstrNext(PDBGFDISASSTATE pState)
143	{
144	uint32_t cbInstr;
145	int rc = DISInstr(&pState->Cpu, (void *)pState->GCPtrNext, 0, &cbInstr, NULL);
146	if (VBOX_SUCCESS(rc))
147	{
148	pState->GCPtrNext = GCPtr + cbInstr;
149	return VINF_SUCCESS;
150	}
151	return rc;
152	}
153	#endif
154
155
156	/**
157	* Done with the dissassembler state, free associated resources.
158	*
159	* @param pState The disas CPU state ++.
160	*/
161	static void dbgfR3DisasInstrDone(PDBGFDISASSTATE pState)
162	{
163	if (pState->fLocked)
164	{
165	PGMPhysReleasePageMappingLock(pState->pVM, &pState->PageMapLock);
166	pState->fLocked = false;
167	}
168	}
169
170
171	/**
172	* Instruction reader.
173	*
174	* @returns VBox status code. (Why this is a int32_t and not just an int is also beyond me.)
175	* @param PtrSrc Address to read from.
176	* In our case this is relative to the selector pointed to by the 2nd user argument of uDisCpu.
177	* @param pu8Dst Where to store the bytes.
178	* @param cbRead Number of bytes to read.
179	* @param uDisCpu Pointer to the disassembler cpu state. (Why this is a VBOXHUINTPTR is beyond me...)
180	* In this context it's always pointer to the Core of a DBGFDISASSTATE.
181	*/
182	static DECLCALLBACK(int) dbgfR3DisasInstrRead(RTUINTPTR PtrSrc, uint8_t pu8Dst, uint32_t cbRead, void pvDisCpu)
183	{
184	PDBGFDISASSTATE pState = (PDBGFDISASSTATE)pvDisCpu;
185	Assert(cbRead > 0);
186	for (;;)
187	{
188	RTGCUINTPTR GCPtr = PtrSrc + pState->GCPtrSegBase;
189
190	/* Need to update the page translation? */
191	if ( !pState->pvPageHC
192	\|\| (GCPtr >> PAGE_SHIFT) != (pState->pvPageGC >> PAGE_SHIFT))
193	{
194	int rc = VINF_SUCCESS;
195
196	/* translate the address */
197	pState->pvPageGC = GCPtr & PAGE_BASE_GC_MASK;
198	if (MMHyperIsInsideArea(pState->pVM, pState->pvPageGC))
199	{
200	pState->pvPageHC = MMHyperGC2HC(pState->pVM, pState->pvPageGC);
201	if (!pState->pvPageHC)
202	rc = VERR_INVALID_POINTER;
203	}
204	else
205	{
206	if (pState->fLocked)
207	PGMPhysReleasePageMappingLock(pState->pVM, &pState->PageMapLock);
208
209	if (pState->enmMode <= PGMMODE_PROTECTED)
210	rc = PGMPhysGCPhys2CCPtrReadOnly(pState->pVM, pState->pvPageGC, &pState->pvPageHC, &pState->PageMapLock);
211	else
212	rc = PGMPhysGCPtr2CCPtrReadOnly(pState->pVM, pState->pvPageGC, &pState->pvPageHC, &pState->PageMapLock);
213	pState->fLocked = RT_SUCCESS_NP(rc);
214	}
215	if (VBOX_FAILURE(rc))
216	{
217	pState->pvPageHC = NULL;
218	return rc;
219	}
220	}
221
222	/* check the segemnt limit */
223	if (!pState->f64Bits && PtrSrc > pState->cbSegLimit)
224	return VERR_OUT_OF_SELECTOR_BOUNDS;
225
226	/* calc how much we can read */
227	uint32_t cb = PAGE_SIZE - (GCPtr & PAGE_OFFSET_MASK);
228	if (!pState->f64Bits)
229	{
230	RTGCUINTPTR cbSeg = pState->GCPtrSegEnd - GCPtr;
231	if (cb > cbSeg && cbSeg)
232	cb = cbSeg;
233	}
234	if (cb > cbRead)
235	cb = cbRead;
236
237	/* read and advance */
238	memcpy(pu8Dst, (char *)pState->pvPageHC + (GCPtr & PAGE_OFFSET_MASK), cb);
239	cbRead -= cb;
240	if (!cbRead)
241	return VINF_SUCCESS;
242	pu8Dst += cb;
243	PtrSrc += cb;
244	}
245	}
246
247
248	/**
249	* @copydoc FNDISGETSYMBOL
250	*/
251	static DECLCALLBACK(int) dbgfR3DisasGetSymbol(PCDISCPUSTATE pCpu, uint32_t u32Sel, RTUINTPTR uAddress, char pszBuf, size_t cchBuf, RTINTPTR poff, void *pvUser)
252	{
253	PDBGFDISASSTATE pState = (PDBGFDISASSTATE)pCpu;
254	PCSELMSELINFO pSelInfo = (PCSELMSELINFO)pvUser;
255	DBGFSYMBOL Sym;
256	RTGCINTPTR off;
257	int rc;
258
259	if (DIS_FMT_SEL_IS_REG(u32Sel))
260	{
261	if (DIS_FMT_SEL_GET_REG(u32Sel) == DIS_SELREG_CS)
262	rc = DBGFR3SymbolByAddr(pState->pVM, uAddress + pSelInfo->GCPtrBase, &off, &Sym);
263	else
264	rc = VERR_SYMBOL_NOT_FOUND; /** @todo implement this */
265	}
266	else
267	{
268	if (pSelInfo->Sel == DIS_FMT_SEL_GET_VALUE(u32Sel))
269	rc = DBGFR3SymbolByAddr(pState->pVM, uAddress + pSelInfo->GCPtrBase, &off, &Sym);
270	else
271	rc = VERR_SYMBOL_NOT_FOUND; /** @todo implement this */
272	}
273
274	if (RT_SUCCESS(rc))
275	{
276	size_t cchName = strlen(Sym.szName);
277	if (cchName >= cchBuf)
278	cchName = cchBuf - 1;
279	memcpy(pszBuf, Sym.szName, cchName);
280	pszBuf[cchName] = '\0';
281
282	*poff = off;
283	}
284
285	return rc;
286	}
287
288
289	/**
290	* Disassembles the one instruction according to the specified flags and address.
291	*
292	* @returns VBox status code.
293	* @param pVM VM handle.
294	* @param Sel The code selector. This used to determin the 32/16 bit ness and
295	* calculation of the actual instruction address.
296	* @param GCPtr The code address relative to the base of Sel.
297	* @param fFlags Flags controlling where to start and how to format.
298	* A combination of the DBGF_DISAS_FLAGS_* \#defines.
299	* @param pszOutput Output buffer.
300	* @param cchOutput Size of the output buffer.
301	* @param pcbInstr Where to return the size of the instruction.
302	*/
303	DBGFR3DECL(int) DBGFR3DisasInstrEx(PVM pVM, RTSEL Sel, RTGCPTR GCPtr, unsigned fFlags, char pszOutput, uint32_t cchOutput, uint32_t pcbInstr)
304	{
305	/*
306	* Get the Sel and GCPtr if fFlags requests that.
307	*/
308	PCCPUMCTXCORE pCtxCore = NULL;
309	CPUMSELREGHID *pHiddenSel = NULL;
310	int rc;
311	if (fFlags & (DBGF_DISAS_FLAGS_CURRENT_GUEST \| DBGF_DISAS_FLAGS_CURRENT_HYPER))
312	{
313	if (fFlags & DBGF_DISAS_FLAGS_CURRENT_GUEST)
314	pCtxCore = CPUMGetGuestCtxCore(pVM);
315	else
316	pCtxCore = CPUMGetHyperCtxCore(pVM);
317	Sel = pCtxCore->cs;
318	pHiddenSel = (CPUMSELREGHID *)&pCtxCore->csHid;
319	GCPtr = pCtxCore->rip;
320	}
321
322	/*
323	* Read the selector info - assume no stale selectors and nasty stuff like that.
324	* Since the selector flags in the CPUMCTX structures aren't up to date unless
325	* we recently visited REM, we'll not search for the selector there.
326	*/
327	SELMSELINFO SelInfo;
328	const PGMMODE enmMode = PGMGetGuestMode(pVM);
329	bool fRealModeAddress = false;
330
331	if ( pHiddenSel
332	&& CPUMAreHiddenSelRegsValid(pVM))
333	{
334	SelInfo.GCPtrBase = pHiddenSel->u64Base;
335	SelInfo.cbLimit = pHiddenSel->u32Limit;
336	SelInfo.fHyper = false;
337	SelInfo.fRealMode = !!((pCtxCore && pCtxCore->eflags.Bits.u1VM) \|\| enmMode == PGMMODE_REAL);
338	SelInfo.Raw.au32[0] = 0;
339	SelInfo.Raw.au32[1] = 0;
340	SelInfo.Raw.Gen.u16LimitLow = ~0;
341	SelInfo.Raw.Gen.u4LimitHigh = ~0;
342	SelInfo.Raw.Gen.u1Present = pHiddenSel->Attr.n.u1Present;
343	SelInfo.Raw.Gen.u1Granularity = pHiddenSel->Attr.n.u1Granularity;;
344	SelInfo.Raw.Gen.u1DefBig = pHiddenSel->Attr.n.u1DefBig;
345	SelInfo.Raw.Gen.u1Long = pHiddenSel->Attr.n.u1Long;
346	SelInfo.Raw.Gen.u1DescType = pHiddenSel->Attr.n.u1DescType;
347	SelInfo.Raw.Gen.u4Type = pHiddenSel->Attr.n.u4Type;
348	fRealModeAddress = SelInfo.fRealMode;
349	}
350	else if (Sel == DBGF_SEL_FLAT)
351	{
352	SelInfo.GCPtrBase = 0;
353	SelInfo.cbLimit = ~0;
354	SelInfo.fHyper = false;
355	SelInfo.fRealMode = false;
356	SelInfo.Raw.au32[0] = 0;
357	SelInfo.Raw.au32[1] = 0;
358	SelInfo.Raw.Gen.u16LimitLow = ~0;
359	SelInfo.Raw.Gen.u4LimitHigh = ~0;
360
361	if (CPUMAreHiddenSelRegsValid(pVM))
362	{ /* Assume the current CS defines the execution mode. */
363	pCtxCore = CPUMGetGuestCtxCore(pVM);
364	pHiddenSel = (CPUMSELREGHID *)&pCtxCore->csHid;
365
366	SelInfo.Raw.Gen.u1Present = pHiddenSel->Attr.n.u1Present;
367	SelInfo.Raw.Gen.u1Granularity = pHiddenSel->Attr.n.u1Granularity;;
368	SelInfo.Raw.Gen.u1DefBig = pHiddenSel->Attr.n.u1DefBig;
369	SelInfo.Raw.Gen.u1Long = pHiddenSel->Attr.n.u1Long;
370	SelInfo.Raw.Gen.u1DescType = pHiddenSel->Attr.n.u1DescType;
371	SelInfo.Raw.Gen.u4Type = pHiddenSel->Attr.n.u4Type;
372	}
373	else
374	{
375	SelInfo.Raw.Gen.u1Present = 1;
376	SelInfo.Raw.Gen.u1Granularity = 1;
377	SelInfo.Raw.Gen.u1DefBig = 1;
378	SelInfo.Raw.Gen.u1DescType = 1;
379	SelInfo.Raw.Gen.u4Type = X86_SEL_TYPE_EO;
380	}
381	}
382	else if ( !(fFlags & DBGF_DISAS_FLAGS_CURRENT_HYPER)
383	&& ( (pCtxCore && pCtxCore->eflags.Bits.u1VM)
384	\|\| enmMode == PGMMODE_REAL) )
385	{ /* V86 mode or real mode - real mode addressing */
386	SelInfo.GCPtrBase = Sel * 16;
387	SelInfo.cbLimit = ~0;
388	SelInfo.fHyper = false;
389	SelInfo.fRealMode = true;
390	SelInfo.Raw.au32[0] = 0;
391	SelInfo.Raw.au32[1] = 0;
392	SelInfo.Raw.Gen.u16LimitLow = ~0;
393	SelInfo.Raw.Gen.u4LimitHigh = ~0;
394	SelInfo.Raw.Gen.u1Present = 1;
395	SelInfo.Raw.Gen.u1Granularity = 1;
396	SelInfo.Raw.Gen.u1DefBig = 0; /* 16 bits */
397	SelInfo.Raw.Gen.u1DescType = 1;
398	SelInfo.Raw.Gen.u4Type = X86_SEL_TYPE_EO;
399	fRealModeAddress = true;
400	}
401	else
402	{
403	rc = SELMR3GetSelectorInfo(pVM, Sel, &SelInfo);
404	if (VBOX_FAILURE(rc))
405	{
406	RTStrPrintf(pszOutput, cchOutput, "Sel=%04x -> %Vrc\n", Sel, rc);
407	return rc;
408	}
409	}
410
411	/*
412	* Disassemble it.
413	*/
414	DBGFDISASSTATE State;
415	rc = dbgfR3DisasInstrFirst(pVM, &SelInfo, enmMode, GCPtr, &State);
416	if (VBOX_FAILURE(rc))
417	{
418	RTStrPrintf(pszOutput, cchOutput, "Disas -> %Vrc\n", rc);
419	return rc;
420	}
421
422	/*
423	* Format it.
424	*/
425	char szBuf[512];
426	DISFormatYasmEx(&State.Cpu, szBuf, sizeof(szBuf),
427	DIS_FMT_FLAGS_RELATIVE_BRANCH,
428	fFlags & DBGF_DISAS_FLAGS_NO_SYMBOLS ? NULL : dbgfR3DisasGetSymbol,
429	&SelInfo);
430
431	/*
432	* Print it to the user specified buffer.
433	*/
434	if (fFlags & DBGF_DISAS_FLAGS_NO_BYTES)
435	{
436	if (fFlags & DBGF_DISAS_FLAGS_NO_ADDRESS)
437	RTStrPrintf(pszOutput, cchOutput, "%s", szBuf);
438	else if (fRealModeAddress)
439	RTStrPrintf(pszOutput, cchOutput, "%04x:%04x %s", Sel, (unsigned)GCPtr, szBuf);
440	else if (Sel == DBGF_SEL_FLAT)
441	{
442	if (enmMode >= PGMMODE_AMD64)
443	RTStrPrintf(pszOutput, cchOutput, "%VGv %s", GCPtr, szBuf);
444	else
445	RTStrPrintf(pszOutput, cchOutput, "%VRv %s", (RTRCPTR)GCPtr, szBuf);
446	}
447	else
448	{
449	if (enmMode >= PGMMODE_AMD64)
450	RTStrPrintf(pszOutput, cchOutput, "%04x:%VGv %s", Sel, GCPtr, szBuf);
451	else
452	RTStrPrintf(pszOutput, cchOutput, "%04x:%VRv %s", Sel, (RTRCPTR)GCPtr, szBuf);
453	}
454	}
455	else
456	{
457	uint32_t cbBits = State.Cpu.opsize;
458	uint8_t pau8Bits = (uint8_t )alloca(cbBits);
459	rc = dbgfR3DisasInstrRead(GCPtr, pau8Bits, cbBits, &State);
460	AssertRC(rc);
461	if (fFlags & DBGF_DISAS_FLAGS_NO_ADDRESS)
462	RTStrPrintf(pszOutput, cchOutput, "%.Vhxs%s %s",
463	cbBits, pau8Bits, cbBits < 8 ? (8 - cbBits) * 3 : 0, "",
464	szBuf);
465	else if (fRealModeAddress)
466	RTStrPrintf(pszOutput, cchOutput, "%04x:%04x %.Vhxs%s %s",
467	Sel, (unsigned)GCPtr,
468	cbBits, pau8Bits, cbBits < 8 ? (8 - cbBits) * 3 : 0, "",
469	szBuf);
470	else if (Sel == DBGF_SEL_FLAT)
471	{
472	if (enmMode >= PGMMODE_AMD64)
473	RTStrPrintf(pszOutput, cchOutput, "%VGv %.Vhxs%s %s",
474	GCPtr,
475	cbBits, pau8Bits, cbBits < 8 ? (8 - cbBits) * 3 : 0, "",
476	szBuf);
477	else
478	RTStrPrintf(pszOutput, cchOutput, "%VRv %.Vhxs%s %s",
479	(RTRCPTR)GCPtr,
480	cbBits, pau8Bits, cbBits < 8 ? (8 - cbBits) * 3 : 0, "",
481	szBuf);
482	}
483	else
484	{
485	if (enmMode >= PGMMODE_AMD64)
486	RTStrPrintf(pszOutput, cchOutput, "%04x:%VGv %.Vhxs%s %s",
487	Sel, GCPtr,
488	cbBits, pau8Bits, cbBits < 8 ? (8 - cbBits) * 3 : 0, "",
489	szBuf);
490	else
491	RTStrPrintf(pszOutput, cchOutput, "%04x:%VRv %.Vhxs%s %s",
492	Sel, (RTRCPTR)GCPtr,
493	cbBits, pau8Bits, cbBits < 8 ? (8 - cbBits) * 3 : 0, "",
494	szBuf);
495	}
496	}
497
498	if (pcbInstr)
499	*pcbInstr = State.Cpu.opsize;
500
501	dbgfR3DisasInstrDone(&State);
502	return VINF_SUCCESS;
503	}
504
505
506	/**
507	* Disassembles an instruction.
508	* Addresses will be tried resolved to symbols
509	*
510	* @returns VBox status code.
511	* @param pVM VM handle.
512	* @param Sel The code selector. This used to determin the 32/16 bit ness and
513	* calculation of the actual instruction address.
514	* @param GCPtr The code address relative to the base of Sel.
515	* @param pszOutput Output buffer.
516	* @param cchOutput Size of the output buffer.
517	*/
518	DBGFR3DECL(int) DBGFR3DisasInstr(PVM pVM, RTSEL Sel, RTGCPTR GCPtr, char *pszOutput, uint32_t cchOutput)
519	{
520	return DBGFR3DisasInstrEx(pVM, Sel, GCPtr, 0, pszOutput, cchOutput, NULL);
521	}
522
523
524	/**
525	* Disassembles the current guest context instruction.
526	* All registers and data will be displayed. Addresses will be attempted resolved to symbols.
527	*
528	* @returns VBox status code.
529	* @param pVM VM handle.
530	* @param pszOutput Output buffer.
531	* @param cchOutput Size of the output buffer.
532	*/
533	DBGFR3DECL(int) DBGFR3DisasInstrCurrent(PVM pVM, char *pszOutput, uint32_t cchOutput)
534	{
535	return DBGFR3DisasInstrEx(pVM, 0, 0, DBGF_DISAS_FLAGS_CURRENT_GUEST, pszOutput, cchOutput, NULL);
536	}
537
538
539	/**
540	* Disassembles the current guest context instruction and writes it to the log.
541	* All registers and data will be displayed. Addresses will be attempted resolved to symbols.
542	*
543	* @returns VBox status code.
544	* @param pVM VM handle.
545	* @param pszPrefix Short prefix string to the dissassembly string. (optional)
546	*/
547	DBGFR3DECL(int) DBGFR3DisasInstrCurrentLogInternal(PVM pVM, const char *pszPrefix)
548	{
549	char szBuf[256];
550	szBuf[0] = '\0';
551	int rc = DBGFR3DisasInstrCurrent(pVM, &szBuf[0], sizeof(szBuf));
552	if (VBOX_FAILURE(rc))
553	RTStrPrintf(szBuf, sizeof(szBuf), "DBGFR3DisasInstrCurrentLog failed with rc=%Vrc\n", rc);
554	if (pszPrefix && *pszPrefix)
555	RTLogPrintf("%s: %s\n", pszPrefix, szBuf);
556	else
557	RTLogPrintf("%s\n", szBuf);
558	return rc;
559	}
560
561
562
563	/**
564	* Disassembles the specified guest context instruction and writes it to the log.
565	* Addresses will be attempted resolved to symbols.
566	*
567	* @returns VBox status code.
568	* @param pVM VM handle.
569	* @param Sel The code selector. This used to determin the 32/16 bit-ness and
570	* calculation of the actual instruction address.
571	* @param GCPtr The code address relative to the base of Sel.
572	*/
573	DBGFR3DECL(int) DBGFR3DisasInstrLogInternal(PVM pVM, RTSEL Sel, RTGCPTR GCPtr)
574	{
575	char szBuf[256];
576	szBuf[0] = '\0';
577	int rc = DBGFR3DisasInstr(pVM, Sel, GCPtr, &szBuf[0], sizeof(szBuf));
578	if (VBOX_FAILURE(rc))
579	RTStrPrintf(szBuf, sizeof(szBuf), "DBGFR3DisasInstrLog(, %RTsel, %RGv) failed with rc=%Vrc\n", Sel, GCPtr, rc);
580	RTLogPrintf("%s\n", szBuf);
581	return rc;
582	}
583

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source: vbox/trunk/src/VBox/VMM/DBGFDisas.cpp@ 12923

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