DBGFDisas.cpp@ 1224

Last change on this file since 1224 was 986, checked in by vboxsync, 18 years ago
Fixed confusion between hyper disasm request and real mode. Also we're converting pages, not the read size.
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 23.9 KB

Line
1	/* $Id: DBGFDisas.cpp 986 2007-02-19 17:24:30Z 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, PAGE_SIZE, &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 ( !(fFlags & DBGF_DISAS_FLAGS_CURRENT_HYPER)
257	&& ( (pCtxCore && pCtxCore->eflags.Bits.u1VM)
258	\|\| enmMode == PGMMODE_REAL) )
259	{ /* V86 mode or real mode - real mode addressing */
260	SelInfo.GCPtrBase = Sel * 16;
261	SelInfo.cbLimit = ~0;
262	SelInfo.fHyper = false;
263	SelInfo.fRealMode = true;
264	SelInfo.Raw.au32[0] = 0;
265	SelInfo.Raw.au32[1] = 0;
266	SelInfo.Raw.Gen.u16LimitLow = ~0;
267	SelInfo.Raw.Gen.u4LimitHigh = ~0;
268	SelInfo.Raw.Gen.u1Present = 1;
269	SelInfo.Raw.Gen.u1Granularity = 1;
270	SelInfo.Raw.Gen.u1DefBig = 0; /* 16 bits */
271	SelInfo.Raw.Gen.u1DescType = 1;
272	SelInfo.Raw.Gen.u4Type = X86_SEL_TYPE_EO;
273	fRealModeAddress = true;
274	}
275	else if (Sel == DBGF_SEL_FLAT)
276	{
277	SelInfo.GCPtrBase = 0;
278	SelInfo.cbLimit = ~0;
279	SelInfo.fHyper = false;
280	SelInfo.fRealMode = false;
281	SelInfo.Raw.au32[0] = 0;
282	SelInfo.Raw.au32[1] = 0;
283	SelInfo.Raw.Gen.u16LimitLow = ~0;
284	SelInfo.Raw.Gen.u4LimitHigh = ~0;
285	SelInfo.Raw.Gen.u1Present = 1;
286	SelInfo.Raw.Gen.u1Granularity = 1;
287	SelInfo.Raw.Gen.u1DefBig = 1;
288	SelInfo.Raw.Gen.u1DescType = 1;
289	SelInfo.Raw.Gen.u4Type = X86_SEL_TYPE_EO;
290	}
291	else
292	{
293	rc = SELMR3GetSelectorInfo(pVM, Sel, &SelInfo);
294	if (VBOX_FAILURE(rc))
295	{
296	RTStrPrintf(pszOutput, cchOutput, "Sel=%04x -> %Vrc\n", Sel, rc);
297	return rc;
298	}
299	}
300
301	/*
302	* Disassemble it.
303	*/
304	DBGFDISASSTATE State;
305	rc = dbgfR3DisasInstrFirst(pVM, &SelInfo, enmMode, GCPtr, &State);
306	if (VBOX_FAILURE(rc))
307	{
308	RTStrPrintf(pszOutput, cchOutput, "Disas -> %Vrc\n", rc);
309	return rc;
310	}
311
312	/*
313	* Format it.
314	*/
315	char szBuf[512];
316	char *psz = &szBuf[0];
317
318	/* prefix */
319	if (State.Cpu.prefix & PREFIX_LOCK)
320	psz = (char *)memcpy(psz, "lock ", sizeof("lock ")) + sizeof("lock ") - 1;
321	if (State.Cpu.prefix & PREFIX_REP)
322	psz = (char *)memcpy(psz, "rep(e) ", sizeof("rep(e) ")) + sizeof("rep(e) ") - 1;
323	else if(State.Cpu.prefix & PREFIX_REPNE)
324	psz = (char *)memcpy(psz, "repne ", sizeof("repne ")) + sizeof("repne ") - 1;
325
326	/* the instruction */
327	const char *pszFormat = State.Cpu.pszOpcode;
328	char ch;
329	while ((ch = *pszFormat) && !isspace(ch) && ch != '%')
330	{
331	*psz++ = ch;
332	pszFormat++;
333	}
334	if (isspace(ch))
335	{
336	do *psz++ = ' ';
337	#ifdef DEBUG_bird /* Not sure if Sander want's this because of log size */
338	while (psz - szBuf < 8);
339	#else
340	while (0);
341	#endif
342	while (isspace(*pszFormat))
343	pszFormat++;
344	}
345
346	if (fFlags & DBGF_DISAS_FLAGS_NO_ANNOTATION)
347	pCtxCore = NULL;
348
349	/** @todo implement annotation and symbol lookup! */
350	int iParam = 1;
351	for (;;)
352	{
353	ch = *pszFormat;
354	if (ch == '%')
355	{
356	ch = pszFormat[1];
357	switch (ch)
358	{
359	/*
360	* Relative jump offset.
361	*/
362	case 'J':
363	{
364	AssertMsg(iParam == 1, ("Invalid branch parameter nr %d\n", iParam));
365	int32_t i32Disp;
366	if (State.Cpu.param1.flags & USE_IMMEDIATE8_REL)
367	i32Disp = (int32_t)(int8_t)State.Cpu.param1.parval;
368	else if (State.Cpu.param1.flags & USE_IMMEDIATE16_REL)
369	i32Disp = (int32_t)(int16_t)State.Cpu.param1.parval;
370	else if (State.Cpu.param1.flags & USE_IMMEDIATE32_REL)
371	i32Disp = (int32_t)State.Cpu.param1.parval;
372	else
373	{
374	AssertMsgFailed(("Oops!\n"));
375	return VERR_GENERAL_FAILURE;
376	}
377	RTGCUINTPTR GCPtrTarget = (RTGCUINTPTR)GCPtr + State.Cpu.opsize + i32Disp;
378	switch (State.Cpu.opmode)
379	{
380	case CPUMODE_16BIT: GCPtrTarget &= UINT16_MAX; break;
381	case CPUMODE_32BIT: GCPtrTarget &= UINT32_MAX; break;
382	}
383	#ifdef DEBUG_bird /* an experiment. */
384	DBGFSYMBOL Sym;
385	RTGCINTPTR off;
386	int rc = DBGFR3SymbolByAddr(pVM, GCPtrTarget + SelInfo.GCPtrBase, &off, &Sym);
387	if ( VBOX_SUCCESS(rc)
388	&& Sym.Value - SelInfo.GCPtrBase <= SelInfo.cbLimit
389	&& off < _1M * 16 && off > -_1M * 16)
390	{
391	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz, "%s", Sym.szName);
392	if (off > 0)
393	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz, "+%#x", (int)off);
394	else if (off > 0)
395	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz, "-%#x", -(int)off);
396	switch (State.Cpu.opmode)
397	{
398	case CPUMODE_16BIT:
399	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz,
400	i32Disp >= 0 ? " (%04VGv/+%x)" : " (%04VGv/-%x)",
401	GCPtrTarget, i32Disp >= 0 ? i32Disp : -i32Disp);
402	break;
403	case CPUMODE_32BIT:
404	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz,
405	i32Disp >= 0 ? " (%08VGv/+%x)" : " (%08VGv/-%x)",
406	GCPtrTarget, i32Disp >= 0 ? i32Disp : -i32Disp);
407	break;
408	default:
409	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz,
410	i32Disp >= 0 ? " (%VGv/+%x)" : " (%VGv/-%x)",
411	GCPtrTarget, i32Disp >= 0 ? i32Disp : -i32Disp);
412	break;
413	}
414	}
415	else
416	#endif /* DEBUG_bird */
417	{
418	switch (State.Cpu.opmode)
419	{
420	case CPUMODE_16BIT:
421	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz,
422	i32Disp >= 0 ? "%04VGv (+%x)" : "%04VGv (-%x)",
423	GCPtrTarget, i32Disp >= 0 ? i32Disp : -i32Disp);
424	break;
425	case CPUMODE_32BIT:
426	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz,
427	i32Disp >= 0 ? "%08VGv (+%x)" : "%08VGv (-%x)",
428	GCPtrTarget, i32Disp >= 0 ? i32Disp : -i32Disp);
429	break;
430	default:
431	psz += RTStrPrintf(psz, &szBuf[sizeof(szBuf)] - psz,
432	i32Disp >= 0 ? "%VGv (+%x)" : "%VGv (-%x)",
433	GCPtrTarget, i32Disp >= 0 ? i32Disp : -i32Disp);
434	break;
435	}
436	}
437	break;
438	}
439
440	case 'A': //direct address
441	case 'C': //control register
442	case 'D': //debug register
443	case 'E': //ModRM specifies parameter
444	case 'F': //Eflags register
445	case 'G': //ModRM selects general register
446	case 'I': //Immediate data
447	case 'M': //ModRM may only refer to memory
448	case 'O': //No ModRM byte
449	case 'P': //ModRM byte selects MMX register
450	case 'Q': //ModRM byte selects MMX register or memory address
451	case 'R': //ModRM byte may only refer to a general register
452	case 'S': //ModRM byte selects a segment register
453	case 'T': //ModRM byte selects a test register
454	case 'V': //ModRM byte selects an XMM/SSE register
455	case 'W': //ModRM byte selects an XMM/SSE register or a memory address
456	case 'X': //DS:SI
457	case 'Y': //ES:DI
458	switch (iParam)
459	{
460	case 1: psz = mystrpcpy(psz, State.Cpu.param1.szParam); break;
461	case 2: psz = mystrpcpy(psz, State.Cpu.param2.szParam); break;
462	case 3: psz = mystrpcpy(psz, State.Cpu.param3.szParam); break;
463	}
464	pszFormat += 2;
465	break;
466
467	case 'e': //register based on operand size (e.g. %eAX)
468	if (State.Cpu.opmode == CPUMODE_32BIT)
469	*psz++ = 'E';
470	*psz++ = pszFormat[2];
471	*psz++ = pszFormat[3];
472	pszFormat += 4;
473	break;
474
475	default:
476	AssertMsgFailed(("Oops! ch=%c\n", ch));
477	break;
478	}
479
480	/* Skip to the next parameter in the format string. */
481	pszFormat = strchr(pszFormat, ',');
482	if (!pszFormat)
483	break;
484	pszFormat++;
485	*psz++ = ch = ',';
486	iParam++;
487	}
488	else
489	{
490	/* output char, but check for parameter separator first. */
491	if (ch == ',')
492	iParam++;
493	*psz++ = ch;
494	if (!ch)
495	break;
496	pszFormat++;
497	}
498
499	#ifdef DEBUG_bird /* Not sure if Sander want's this because of log size */
500	/* space after commas */
501	if (ch == ',')
502	{
503	while (isspace(*pszFormat))
504	pszFormat++;
505	*psz++ = ' ';
506	}
507	#endif
508	} /* foreach char in pszFormat */
509	*psz = '\0';
510
511	/*
512	* Print it to the user specified buffer.
513	*/
514	if (fFlags & DBGF_DISAS_FLAGS_NO_BYTES)
515	{
516	if (fFlags & DBGF_DISAS_FLAGS_NO_ADDRESS)
517	RTStrPrintf(pszOutput, cchOutput, "%s", szBuf);
518	else if (fRealModeAddress)
519	RTStrPrintf(pszOutput, cchOutput, "%04x:%04x %s", Sel, (unsigned)GCPtr, szBuf);
520	else if (Sel == DBGF_SEL_FLAT)
521	RTStrPrintf(pszOutput, cchOutput, "%VGv %s", GCPtr, szBuf);
522	else
523	RTStrPrintf(pszOutput, cchOutput, "%04x:%VGv %s", Sel, GCPtr, szBuf);
524	}
525	else
526	{
527	size_t cbBits = State.Cpu.opsize;
528	uint8_t pau8Bits = (uint8_t )alloca(cbBits);
529	rc = dbgfR3DisasInstrRead(GCPtr, pau8Bits, cbBits, (uintptr_t)&State);
530	AssertRC(rc);
531	if (fFlags & DBGF_DISAS_FLAGS_NO_ADDRESS)
532	RTStrPrintf(pszOutput, cchOutput, "%.Vhxs%s %s",
533	cbBits, pau8Bits, cbBits < 8 ? (8 - cbBits) * 3 : 0, "",
534	szBuf);
535	else if (fRealModeAddress)
536	RTStrPrintf(pszOutput, cchOutput, "%04x:%04x %.Vhxs%s %s",
537	Sel, (unsigned)GCPtr,
538	cbBits, pau8Bits, cbBits < 8 ? (8 - cbBits) * 3 : 0, "",
539	szBuf);
540	else if (Sel == DBGF_SEL_FLAT)
541	RTStrPrintf(pszOutput, cchOutput, "%VGv %.Vhxs%s %s",
542	GCPtr,
543	cbBits, pau8Bits, cbBits < 8 ? (8 - cbBits) * 3 : 0, "",
544	szBuf);
545	else
546	RTStrPrintf(pszOutput, cchOutput, "%04x:%VGv %.Vhxs%s %s",
547	Sel, GCPtr,
548	cbBits, pau8Bits, cbBits < 8 ? (8 - cbBits) * 3 : 0, "",
549	szBuf);
550
551	}
552
553	if (pcbInstr)
554	*pcbInstr = State.Cpu.opsize;
555	return VINF_SUCCESS;
556	}
557
558
559	/**
560	* Disassembles an instruction.
561	* Addresses will be tried resolved to symbols
562	*
563	* @returns VBox status code.
564	* @param pVM VM handle.
565	* @param Sel The code selector. This used to determin the 32/16 bit ness and
566	* calculation of the actual instruction address.
567	* @param GCPtr The code address relative to the base of Sel.
568	* @param pszOutput Output buffer.
569	* @param cchOutput Size of the output buffer.
570	*/
571	DBGFR3DECL(int) DBGFR3DisasInstr(PVM pVM, RTSEL Sel, RTGCPTR GCPtr, char *pszOutput, uint32_t cchOutput)
572	{
573	return DBGFR3DisasInstrEx(pVM, Sel, GCPtr, 0, pszOutput, cchOutput, NULL);
574	}
575
576
577	/**
578	* Disassembles the current guest context instruction.
579	* All registers and data will be displayed. Addresses will be attempted resolved to symbols.
580	*
581	* @returns VBox status code.
582	* @param pVM VM handle.
583	* @param pszOutput Output buffer.
584	* @param cchOutput Size of the output buffer.
585	*/
586	DBGFR3DECL(int) DBGFR3DisasInstrCurrent(PVM pVM, char *pszOutput, uint32_t cchOutput)
587	{
588	return DBGFR3DisasInstrEx(pVM, 0, 0, DBGF_DISAS_FLAGS_CURRENT_GUEST, pszOutput, cchOutput, NULL);
589	}
590
591
592	/**
593	* Disassembles the current guest context instruction and writes it to the log.
594	* All registers and data will be displayed. Addresses will be attempted resolved to symbols.
595	*
596	* @returns VBox status code.
597	* @param pVM VM handle.
598	* @param pszPrefix Short prefix string to the dissassembly string. (optional)
599	*/
600	DBGFR3DECL(int) DBGFR3DisasInstrCurrentLogInternal(PVM pVM, const char *pszPrefix)
601	{
602	char szBuf[256];
603	szBuf[0] = '\0';
604	int rc = DBGFR3DisasInstrCurrent(pVM, &szBuf[0], sizeof(szBuf));
605	if (VBOX_FAILURE(rc))
606	RTStrPrintf(szBuf, sizeof(szBuf), "DBGFR3DisasInstrCurrentLog failed with rc=%Vrc\n", rc);
607	if (pszPrefix && *pszPrefix)
608	RTLogPrintf("%s: %s\n", pszPrefix, szBuf);
609	else
610	RTLogPrintf("%s\n", szBuf);
611	return rc;
612	}
613
614
615
616	/**
617	* Disassembles the specified guest context instruction and writes it to the log.
618	* Addresses will be attempted resolved to symbols.
619	*
620	* @returns VBox status code.
621	* @param pVM VM handle.
622	* @param Sel The code selector. This used to determin the 32/16 bit-ness and
623	* calculation of the actual instruction address.
624	* @param GCPtr The code address relative to the base of Sel.
625	*/
626	DBGFR3DECL(int) DBGFR3DisasInstrLogInternal(PVM pVM, RTSEL Sel, RTGCPTR GCPtr)
627	{
628	char szBuf[256];
629	szBuf[0] = '\0';
630	int rc = DBGFR3DisasInstr(pVM, Sel, GCPtr, &szBuf[0], sizeof(szBuf));
631	if (VBOX_FAILURE(rc))
632	RTStrPrintf(szBuf, sizeof(szBuf), "DBGFR3DisasInstrLog(, %RTsel, %RGv) failed with rc=%Vrc\n", Sel, GCPtr, rc);
633	RTLogPrintf("%s\n", szBuf);
634	return rc;
635	}
636

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source: vbox/trunk/src/VBox/VMM/DBGFDisas.cpp@ 1224

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