DBGFDisas.cpp@ 400

Last change on this file since 400 was 23, checked in by vboxsync, 18 years ago
string.h & stdio.h + header cleanups.
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File size: 23.9 KB

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1	/* $Id: DBGFDisas.cpp 23 2007-01-15 14:08:28Z vboxsync $ */
2	/** @file
3	* VMM DBGF - Debugger Facility, Disassembler.
4	*/
5
6	/*
7	* Copyright (C) 2006 InnoTek Systemberatung GmbH
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 as published by the Free Software Foundation,
13	* in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
14	* distribution. VirtualBox OSE is distributed in the hope that it will
15	* be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* If you received this file as part of a commercial VirtualBox
18	* distribution, then only the terms of your commercial VirtualBox
19	* license agreement apply instead of the previous paragraph.
20	*/
21
22
23	/*******************************************************************************
24	* Header Files *
25	*******************************************************************************/
26	#define LOG_GROUP LOG_GROUP_DBGF
27	#include <VBox/dbgf.h>
28	#include <VBox/selm.h>
29	#include <VBox/mm.h>
30	#include <VBox/pgm.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	* Internal Functions *
45	*******************************************************************************/
46	static DECLCALLBACK(int32_t) dbgfR3DisasInstrRead(RTHCUINTPTR pSrc, uint8_t *pDest, uint32_t size, RTHCUINTPTR dwUserdata);
47
48
49	/**
50	* Structure used when disassembling and instructions in DBGF.
51	* This is used so the reader function can get the stuff it needs.
52	*/
53	typedef struct
54	{
55	/** The core structure. */
56	DISCPUSTATE Cpu;
57	/** The VM handle. */
58	PVM pVM;
59	/** Pointer to the first byte in the segemnt. */
60	RTGCUINTPTR GCPtrSegBase;
61	/** Pointer to the byte after the end of the segment. (might have wrapped!) */
62	RTGCUINTPTR GCPtrSegEnd;
63	/** The size of the segment minus 1. */
64	RTGCUINTPTR cbSegLimit;
65	/** The guest paging mode. */
66	PGMMODE enmMode;
67	/** Pointer to the current page - HC Ptr. */
68	void *pvPageHC;
69	/** Pointer to the current page - GC Ptr. */
70	RTGCPTR pvPageGC;
71	/** The rc of the operation.
72	* @todo r=bird: it's rather annoying that we have to keep track of the status code of the operation.
73	* When we've got time we should adjust the disassembler to use VBox status codes and not
74	* boolean returns.
75	*/
76	int rc;
77	/** Pointer to the next instruction (relative to GCPtrSegBase). */
78	RTGCUINTPTR GCPtrNext;
79	} DBGFDISASSTATE, *PDBGFDISASSTATE;
80
81
82
83	/**
84	* Calls the dissassembler with the proper reader functions and such for disa
85	*
86	* @returns VBox status code.
87	* @param pVM VM handle
88	* @param pSelInfo The selector info.
89	* @param enmMode The guest paging mode.
90	* @param GCPtr The GC pointer (selector offset).
91	* @param pState The disas CPU state.
92	*/
93	static int dbgfR3DisasInstrFirst(PVM pVM, PSELMSELINFO pSelInfo, PGMMODE enmMode, RTGCPTR GCPtr, PDBGFDISASSTATE pState)
94	{
95	pState->Cpu.mode = pSelInfo->Raw.Gen.u1DefBig ? CPUMODE_32BIT : CPUMODE_16BIT;
96	pState->Cpu.pfnReadBytes = dbgfR3DisasInstrRead;
97	pState->GCPtrSegBase = pSelInfo->GCPtrBase;
98	pState->GCPtrSegEnd = pSelInfo->cbLimit + 1 + (RTGCUINTPTR)pSelInfo->GCPtrBase;
99	pState->cbSegLimit = pSelInfo->cbLimit;
100	pState->enmMode = enmMode;
101	pState->pvPageGC = 0;
102	pState->pvPageHC = NULL;
103	pState->rc = VINF_SUCCESS;
104	pState->pVM = pVM;
105	Assert((uintptr_t)GCPtr == GCPtr);
106	uint32_t cbInstr;
107	if (DISInstr(&pState->Cpu, GCPtr, 0, &cbInstr, NULL))
108	{
109	pState->GCPtrNext = GCPtr + cbInstr;
110	return VINF_SUCCESS;
111	}
112	if (VBOX_FAILURE(pState->rc))
113	return pState->rc;
114	return VERR_GENERAL_FAILURE;
115	}
116
117
118	#if 0
119	/**
120	* Calls the dissassembler for disassembling the next instruction.
121	*
122	* @returns VBox status code.
123	* @param pState The disas CPU state.
124	*/
125	static int dbgfR3DisasInstrNext(PDBGFDISASSTATE pState)
126	{
127	pState->rc = VINF_SUCCESS;
128	uint32_t cbInstr;
129	if (DISInstr(&pState->Cpu, (void *)pState->GCPtrNext, 0, &cbInstr, NULL))
130	{
131	pState->GCPtrNext = GCPtr + cbInstr;
132	return VINF_SUCCESS;
133	}
134	if (VBOX_FAILURE(pState->rc))
135	return pState->rc;
136	return VERR_GENERAL_FAILURE;
137	}
138	#endif
139
140
141	/**
142	* Instruction reader.
143	*
144	* @returns VBox status code. (Why this is a int32_t and not just an int is also beyond me.)
145	* @param PtrSrc Address to read from.
146	* In our case this is relative to the selector pointed to by the 2nd user argument of uDisCpu.
147	* @param pu8Dst Where to store the bytes.
148	* @param cbRead Number of bytes to read.
149	* @param uDisCpu Pointer to the disassembler cpu state. (Why this is a VBOXHUINTPTR is beyond me...)
150	* In this context it's always pointer to the Core of a DBGFDISASSTATE.
151	*/
152	static DECLCALLBACK(int32_t) dbgfR3DisasInstrRead(RTHCUINTPTR PtrSrc, uint8_t *pu8Dst, uint32_t cbRead, RTHCUINTPTR uDisCpu)
153	{
154	PDBGFDISASSTATE pState = (PDBGFDISASSTATE)uDisCpu;
155	Assert(cbRead > 0);
156	for (;;)
157	{
158	RTGCUINTPTR GCPtr = PtrSrc + pState->GCPtrSegBase;
159
160	/* Need to update the page translation? */
161	if ( !pState->pvPageHC
162	\|\| (GCPtr >> PAGE_SHIFT) != (pState->pvPageGC >> PAGE_SHIFT))
163	{
164	/* translate the address */
165	pState->pvPageGC = GCPtr & PAGE_BASE_GC_MASK;
166	if (MMHyperIsInsideArea(pState->pVM, pState->pvPageGC))
167	{
168	pState->pvPageHC = MMHyperGC2HC(pState->pVM, pState->pvPageGC);
169	if (!pState->pvPageHC)
170	pState->rc = VERR_INVALID_POINTER;
171	}
172	else if (pState->enmMode <= PGMMODE_PROTECTED)
173	pState->rc = PGMPhysGCPhys2HCPtr(pState->pVM, pState->pvPageGC, &pState->pvPageHC);
174	else
175	pState->rc = PGMPhysGCPtr2HCPtr(pState->pVM, pState->pvPageGC, &pState->pvPageHC);
176	if (VBOX_FAILURE(pState->rc))
177	{
178	pState->pvPageHC = NULL;
179	return pState->rc;
180	}
181	}
182
183	/* check the segemnt limit */
184	if (PtrSrc > pState->cbSegLimit)
185	return pState->rc = VERR_OUT_OF_SELECTOR_BOUNDS;
186
187	/* calc how much we can read */
188	uint32_t cb = PAGE_SIZE - (GCPtr & PAGE_OFFSET_MASK);
189	RTGCUINTPTR cbSeg = pState->GCPtrSegEnd - GCPtr;
190	if (cb > cbSeg && cbSeg)
191	cb = cbSeg;
192	if (cb > cbRead)
193	cb = cbRead;
194
195	/* read and advance */
196	memcpy(pu8Dst, (char *)pState->pvPageHC + (GCPtr & PAGE_OFFSET_MASK), cb);
197	cbRead -= cb;
198	if (!cbRead)
199	return VINF_SUCCESS;
200	pu8Dst += cb;
201	PtrSrc += cb;
202	}
203	}
204
205
206	/**
207	* Copy a string and return pointer to the terminator char in the copy.
208	*/
209	inline char mystrpcpy(char pszDst, const char *pszSrc)
210	{
211	size_t cch = strlen(pszSrc);
212	memcpy(pszDst, pszSrc, cch + 1);
213	return pszDst + cch;
214	}
215
216
217	/**
218	* Disassembles the one instruction according to the specified flags and address.
219	*
220	* @returns VBox status code.
221	* @param pVM VM handle.
222	* @param Sel The code selector. This used to determin the 32/16 bit ness and
223	* calculation of the actual instruction address.
224	* @param GCPtr The code address relative to the base of Sel.
225	* @param fFlags Flags controlling where to start and how to format.
226	* A combination of the DBGF_DISAS_FLAGS_* \#defines.
227	* @param pszOutput Output buffer.
228	* @param cchOutput Size of the output buffer.
229	* @param pcbInstr Where to return the size of the instruction.
230	*/
231	DBGFR3DECL(int) DBGFR3DisasInstrEx(PVM pVM, RTSEL Sel, RTGCPTR GCPtr, unsigned fFlags, char pszOutput, uint32_t cchOutput, uint32_t pcbInstr)
232	{
233	/*
234	* Get the Sel and GCPtr if fFlags requests that.
235	*/
236	PCCPUMCTXCORE pCtxCore = NULL;
237	int rc;
238	if (fFlags & (DBGF_DISAS_FLAGS_CURRENT_GUEST \| DBGF_DISAS_FLAGS_CURRENT_HYPER))
239	{
240	if (fFlags & DBGF_DISAS_FLAGS_CURRENT_GUEST)
241	pCtxCore = CPUMGetGuestCtxCore(pVM);
242	else
243	pCtxCore = CPUMGetHyperCtxCore(pVM);
244	Sel = pCtxCore->cs;
245	GCPtr = pCtxCore->eip;
246	}
247
248	/*
249	* Read the selector info - assume no stale selectors and nasty stuff like that.
250	* Since the selector flags in the CPUMCTX structures aren't up to date unless
251	* we recently visited REM, we'll not search for the selector there.
252	*/
253	SELMSELINFO SelInfo;
254	const PGMMODE enmMode = PGMGetGuestMode(pVM);
255	bool fRealModeAddress = false;
256	if ( (pCtxCore && pCtxCore->eflags.Bits.u1VM == 1)
257	\|\| enmMode == PGMMODE_REAL)
258	{ /* V86 mode or real mode - real mode addressing */
259	SelInfo.GCPtrBase = Sel * 16;
260	SelInfo.cbLimit = ~0;
261	SelInfo.fHyper = false;
262	SelInfo.fRealMode = true;
263	SelInfo.Raw.au32[0] = 0;
264	SelInfo.Raw.au32[1] = 0;
265	SelInfo.Raw.Gen.u16LimitLow = ~0;
266	SelInfo.Raw.Gen.u4LimitHigh = ~0;
267	SelInfo.Raw.Gen.u1Present = 1;
268	SelInfo.Raw.Gen.u1Granularity = 1;
269	SelInfo.Raw.Gen.u1DefBig = 0; /* 16 bits */
270	SelInfo.Raw.Gen.u1DescType = 1;
271	SelInfo.Raw.Gen.u4Type = X86_SEL_TYPE_EO;
272	fRealModeAddress = true;
273	}
274	else if (Sel == DBGF_SEL_FLAT)
275	{
276	SelInfo.GCPtrBase = 0;
277	SelInfo.cbLimit = ~0;
278	SelInfo.fHyper = false;
279	SelInfo.fRealMode = false;
280	SelInfo.Raw.au32[0] = 0;
281	SelInfo.Raw.au32[1] = 0;
282	SelInfo.Raw.Gen.u16LimitLow = ~0;
283	SelInfo.Raw.Gen.u4LimitHigh = ~0;
284	SelInfo.Raw.Gen.u1Present = 1;
285	SelInfo.Raw.Gen.u1Granularity = 1;
286	SelInfo.Raw.Gen.u1DefBig = 1;
287	SelInfo.Raw.Gen.u1DescType = 1;
288	SelInfo.Raw.Gen.u4Type = X86_SEL_TYPE_EO;
289	}
290	else
291	{
292	rc = SELMR3GetSelectorInfo(pVM, Sel, &SelInfo);
293	if (VBOX_FAILURE(rc))
294	{
295	RTStrPrintf(pszOutput, cchOutput, "Sel=%04x -> %Vrc\n", Sel, rc);
296	return rc;
297	}
298	}
299
300	/*
301	* Disassemble it.
302	*/
303	DBGFDISASSTATE State;
304	rc = dbgfR3DisasInstrFirst(pVM, &SelInfo, enmMode, GCPtr, &State);
305	if (VBOX_FAILURE(rc))
306	{
307	RTStrPrintf(pszOutput, cchOutput, "Disas -> %Vrc\n", rc);
308	return rc;
309	}
310
311	/*
312	* Format it.
313	*/
314	char szBuf[512];
315	char *psz = &szBuf[0];
316
317	/* prefix */
318	if (State.Cpu.prefix & PREFIX_LOCK)
319	psz = (char *)memcpy(psz, "lock ", sizeof("lock ")) + sizeof("lock ") - 1;
320	if (State.Cpu.prefix & PREFIX_REP)
321	psz = (char *)memcpy(psz, "rep(e) ", sizeof("rep(e) ")) + sizeof("rep(e) ") - 1;
322	else if(State.Cpu.prefix & PREFIX_REPNE)
323	psz = (char *)memcpy(psz, "repne ", sizeof("repne ")) + sizeof("repne ") - 1;
324
325	/* the instruction */
326	const char *pszFormat = State.Cpu.pszOpcode;
327	char ch;
328	while ((ch = *pszFormat) && !isspace(ch) && ch != '%')
329	{
330	*psz++ = ch;
331	pszFormat++;
332	}
333	if (isspace(ch))
334	{
335	do *psz++ = ' ';
336	#ifdef DEBUG_bird /* Not sure if Sander want's this because of log size */
337	while (psz - szBuf < 8);
338	#else
339	while (0);
340	#endif
341	while (isspace(*pszFormat))
342	pszFormat++;
343	}
344
345	if (fFlags & DBGF_DISAS_FLAGS_NO_ANNOTATION)
346	pCtxCore = NULL;
347
348	/** @todo implement annotation and symbol lookup! */
349	int iParam = 1;
350	for (;;)
351	{
352	ch = *pszFormat;
353	if (ch == '%')
354	{
355	ch = pszFormat[1];
356	switch (ch)
357	{
358	/*
359	* Relative jump offset.
360	*/
361	case 'J':
362	{
363	AssertMsg(iParam == 1, ("Invalid branch parameter nr %d\n", iParam));
364	int32_t i32Disp;
365	if (State.Cpu.param1.flags & USE_IMMEDIATE8_REL)
366	i32Disp = (int32_t)(int8_t)State.Cpu.param1.parval;
367	else if (State.Cpu.param1.flags & USE_IMMEDIATE16_REL)
368	i32Disp = (int32_t)(int16_t)State.Cpu.param1.parval;
369	else if (State.Cpu.param1.flags & USE_IMMEDIATE32_REL)
370	i32Disp = (int32_t)State.Cpu.param1.parval;
371	else
372	{
373	AssertMsgFailed(("Oops!\n"));
374	return VERR_GENERAL_FAILURE;
375	}
376	RTGCUINTPTR GCPtrTarget = (RTGCUINTPTR)GCPtr + State.Cpu.opsize + i32Disp;
377	switch (State.Cpu.opmode)
378	{
379	case CPUMODE_16BIT: GCPtrTarget &= UINT16_MAX; break;
380	case CPUMODE_32BIT: GCPtrTarget &= UINT32_MAX; break;
381	}
382	#ifdef DEBUG_bird /* an experiment. */
383	DBGFSYMBOL Sym;
384	RTGCINTPTR off;
385	int rc = DBGFR3SymbolByAddr(pVM, GCPtrTarget + SelInfo.GCPtrBase, &off, &Sym);
386	if ( VBOX_SUCCESS(rc)
387	&& Sym.Value - SelInfo.GCPtrBase <= SelInfo.cbLimit
388	&& off < _1M * 16 && off > -_1M * 16)
389	{
390	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz, "%s", Sym.szName);
391	if (off > 0)
392	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz, "+%#x", (int)off);
393	else if (off > 0)
394	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz, "-%#x", -(int)off);
395	switch (State.Cpu.opmode)
396	{
397	case CPUMODE_16BIT:
398	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz,
399	i32Disp >= 0 ? " (%04VGv/+%x)" : " (%04VGv/-%x)",
400	GCPtrTarget, i32Disp >= 0 ? i32Disp : -i32Disp);
401	break;
402	case CPUMODE_32BIT:
403	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz,
404	i32Disp >= 0 ? " (%08VGv/+%x)" : " (%08VGv/-%x)",
405	GCPtrTarget, i32Disp >= 0 ? i32Disp : -i32Disp);
406	break;
407	default:
408	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz,
409	i32Disp >= 0 ? " (%VGv/+%x)" : " (%VGv/-%x)",
410	GCPtrTarget, i32Disp >= 0 ? i32Disp : -i32Disp);
411	break;
412	}
413	}
414	else
415	#endif /* DEBUG_bird */
416	{
417	switch (State.Cpu.opmode)
418	{
419	case CPUMODE_16BIT:
420	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz,
421	i32Disp >= 0 ? "%04VGv (+%x)" : "%04VGv (-%x)",
422	GCPtrTarget, i32Disp >= 0 ? i32Disp : -i32Disp);
423	break;
424	case CPUMODE_32BIT:
425	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz,
426	i32Disp >= 0 ? "%08VGv (+%x)" : "%08VGv (-%x)",
427	GCPtrTarget, i32Disp >= 0 ? i32Disp : -i32Disp);
428	break;
429	default:
430	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz,
431	i32Disp >= 0 ? "%VGv (+%x)" : "%VGv (-%x)",
432	GCPtrTarget, i32Disp >= 0 ? i32Disp : -i32Disp);
433	break;
434	}
435	}
436	break;
437	}
438
439	case 'A': //direct address
440	case 'C': //control register
441	case 'D': //debug register
442	case 'E': //ModRM specifies parameter
443	case 'F': //Eflags register
444	case 'G': //ModRM selects general register
445	case 'I': //Immediate data
446	case 'M': //ModRM may only refer to memory
447	case 'O': //No ModRM byte
448	case 'P': //ModRM byte selects MMX register
449	case 'Q': //ModRM byte selects MMX register or memory address
450	case 'R': //ModRM byte may only refer to a general register
451	case 'S': //ModRM byte selects a segment register
452	case 'T': //ModRM byte selects a test register
453	case 'V': //ModRM byte selects an XMM/SSE register
454	case 'W': //ModRM byte selects an XMM/SSE register or a memory address
455	case 'X': //DS:SI
456	case 'Y': //ES:DI
457	switch (iParam)
458	{
459	case 1: psz = mystrpcpy(psz, State.Cpu.param1.szParam); break;
460	case 2: psz = mystrpcpy(psz, State.Cpu.param2.szParam); break;
461	case 3: psz = mystrpcpy(psz, State.Cpu.param3.szParam); break;
462	}
463	pszFormat += 2;
464	break;
465
466	case 'e': //register based on operand size (e.g. %eAX)
467	if (State.Cpu.opmode == CPUMODE_32BIT)
468	*psz++ = 'E';
469	*psz++ = pszFormat[2];
470	*psz++ = pszFormat[3];
471	pszFormat += 4;
472	break;
473
474	default:
475	AssertMsgFailed(("Oops! ch=%c\n", ch));
476	break;
477	}
478
479	/* Skip to the next parameter in the format string. */
480	pszFormat = strchr(pszFormat, ',');
481	if (!pszFormat)
482	break;
483	pszFormat++;
484	*psz++ = ch = ',';
485	iParam++;
486	}
487	else
488	{
489	/* output char, but check for parameter separator first. */
490	if (ch == ',')
491	iParam++;
492	*psz++ = ch;
493	if (!ch)
494	break;
495	pszFormat++;
496	}
497
498	#ifdef DEBUG_bird /* Not sure if Sander want's this because of log size */
499	/* space after commas */
500	if (ch == ',')
501	{
502	while (isspace(*pszFormat))
503	pszFormat++;
504	*psz++ = ' ';
505	}
506	#endif
507	} /* foreach char in pszFormat */
508	*psz = '\0';
509
510	/*
511	* Print it to the user specified buffer.
512	*/
513	if (fFlags & DBGF_DISAS_FLAGS_NO_BYTES)
514	{
515	if (fFlags & DBGF_DISAS_FLAGS_NO_ADDRESS)
516	RTStrPrintf(pszOutput, cchOutput, "%s", szBuf);
517	else if (fRealModeAddress)
518	RTStrPrintf(pszOutput, cchOutput, "%04x:%04x %s", Sel, (unsigned)GCPtr, szBuf);
519	else if (Sel == DBGF_SEL_FLAT)
520	RTStrPrintf(pszOutput, cchOutput, "%VGv %s", GCPtr, szBuf);
521	else
522	RTStrPrintf(pszOutput, cchOutput, "%04x:%VGv %s", Sel, GCPtr, szBuf);
523	}
524	else
525	{
526	size_t cbBits = State.Cpu.opsize;
527	uint8_t pau8Bits = (uint8_t )alloca(cbBits);
528	rc = dbgfR3DisasInstrRead(GCPtr, pau8Bits, cbBits, (uintptr_t)&State);
529	AssertRC(rc);
530	if (fFlags & DBGF_DISAS_FLAGS_NO_ADDRESS)
531	RTStrPrintf(pszOutput, cchOutput, "%.Vhxs%s %s",
532	cbBits, pau8Bits, cbBits < 8 ? (8 - cbBits) * 3 : 0, "",
533	szBuf);
534	else if (fRealModeAddress)
535	RTStrPrintf(pszOutput, cchOutput, "%04x:%04x %.Vhxs%s %s",
536	Sel, (unsigned)GCPtr,
537	cbBits, pau8Bits, cbBits < 8 ? (8 - cbBits) * 3 : 0, "",
538	szBuf);
539	else if (Sel == DBGF_SEL_FLAT)
540	RTStrPrintf(pszOutput, cchOutput, "%VGv %.Vhxs%s %s",
541	GCPtr,
542	cbBits, pau8Bits, cbBits < 8 ? (8 - cbBits) * 3 : 0, "",
543	szBuf);
544	else
545	RTStrPrintf(pszOutput, cchOutput, "%04x:%VGv %.Vhxs%s %s",
546	Sel, GCPtr,
547	cbBits, pau8Bits, cbBits < 8 ? (8 - cbBits) * 3 : 0, "",
548	szBuf);
549
550	}
551
552	if (pcbInstr)
553	*pcbInstr = State.Cpu.opsize;
554	return VINF_SUCCESS;
555	}
556
557
558	/**
559	* Disassembles an instruction.
560	* Addresses will be tried resolved to symbols
561	*
562	* @returns VBox status code.
563	* @param pVM VM handle.
564	* @param Sel The code selector. This used to determin the 32/16 bit ness and
565	* calculation of the actual instruction address.
566	* @param GCPtr The code address relative to the base of Sel.
567	* @param pszOutput Output buffer.
568	* @param cchOutput Size of the output buffer.
569	*/
570	DBGFR3DECL(int) DBGFR3DisasInstr(PVM pVM, RTSEL Sel, RTGCPTR GCPtr, char *pszOutput, uint32_t cchOutput)
571	{
572	return DBGFR3DisasInstrEx(pVM, Sel, GCPtr, 0, pszOutput, cchOutput, NULL);
573	}
574
575
576	/**
577	* Disassembles the current guest context instruction.
578	* All registers and data will be displayed. Addresses will be attempted resolved to symbols.
579	*
580	* @returns VBox status code.
581	* @param pVM VM handle.
582	* @param pszOutput Output buffer.
583	* @param cchOutput Size of the output buffer.
584	*/
585	DBGFR3DECL(int) DBGFR3DisasInstrCurrent(PVM pVM, char *pszOutput, uint32_t cchOutput)
586	{
587	return DBGFR3DisasInstrEx(pVM, 0, 0, DBGF_DISAS_FLAGS_CURRENT_GUEST, pszOutput, cchOutput, NULL);
588	}
589
590
591	/**
592	* Disassembles the current guest context instruction and writes it to the log.
593	* All registers and data will be displayed. Addresses will be attempted resolved to symbols.
594	*
595	* @returns VBox status code.
596	* @param pVM VM handle.
597	* @param pszPrefix Short prefix string to the dissassembly string. (optional)
598	*/
599	DBGFR3DECL(int) DBGFR3DisasInstrCurrentLogInternal(PVM pVM, const char *pszPrefix)
600	{
601	char szBuf[256];
602	szBuf[0] = '\0';
603	int rc = DBGFR3DisasInstrCurrent(pVM, &szBuf[0], sizeof(szBuf));
604	if (VBOX_FAILURE(rc))
605	RTStrPrintf(szBuf, sizeof(szBuf), "DBGFR3DisasInstrCurrentLog failed with rc=%Vrc\n", rc);
606	if (pszPrefix && *pszPrefix)
607	RTLogPrintf("%s: %s\n", pszPrefix, szBuf);
608	else
609	RTLogPrintf("%s\n", szBuf);
610	return rc;
611	}
612
613
614
615	/**
616	* Disassembles the specified guest context instruction and writes it to the log.
617	* Addresses will be attempted resolved to symbols.
618	*
619	* @returns VBox status code.
620	* @param pVM VM handle.
621	* @param Sel The code selector. This used to determin the 32/16 bit-ness and
622	* calculation of the actual instruction address.
623	* @param GCPtr The code address relative to the base of Sel.
624	*/
625	DBGFR3DECL(int) DBGFR3DisasInstrLogInternal(PVM pVM, RTSEL Sel, RTGCPTR GCPtr)
626	{
627	char szBuf[256];
628	szBuf[0] = '\0';
629	int rc = DBGFR3DisasInstr(pVM, Sel, GCPtr, &szBuf[0], sizeof(szBuf));
630	if (VBOX_FAILURE(rc))
631	RTStrPrintf(szBuf, sizeof(szBuf), "DBGFR3DisasInstrLog(, %RTsel, %RGv) failed with rc=%Vrc\n", Sel, GCPtr, rc);
632	RTLogPrintf("%s\n", szBuf);
633	return rc;
634	}
635

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source: vbox/trunk/src/VBox/VMM/DBGFDisas.cpp@ 400

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