DisasmCore.cpp@ 28867

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1	/** @file
2	*
3	* VBox disassembler:
4	* Core components
5	*/
6
7	/*
8	* Copyright (C) 2006-2007 Oracle Corporation
9	*
10	* This file is part of VirtualBox Open Source Edition (OSE), as
11	* available from http://www.virtualbox.org. This file is free software;
12	* you can redistribute it and/or modify it under the terms of the GNU
13	* General Public License (GPL) as published by the Free Software
14	* Foundation, in version 2 as it comes in the "COPYING" file of the
15	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
16	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
17	*/
18
19
20	/*******************************************************************************
21	* Header Files *
22	*******************************************************************************/
23	#define LOG_GROUP LOG_GROUP_DIS
24	#ifdef USING_VISUAL_STUDIO
25	# include <stdafx.h>
26	#endif
27
28	#include <VBox/dis.h>
29	#include <VBox/disopcode.h>
30	#include <VBox/cpum.h>
31	#include <VBox/err.h>
32	#include <VBox/log.h>
33	#include <iprt/assert.h>
34	#include <iprt/string.h>
35	#include <iprt/stdarg.h>
36	#include "DisasmInternal.h"
37	#include "DisasmTables.h"
38
39	#if !defined(DIS_CORE_ONLY) && defined(LOG_ENABLED)
40	# include <stdlib.h>
41	# include <stdio.h>
42	#endif
43
44
45	/*******************************************************************************
46	* Internal Functions *
47	*******************************************************************************/
48	static int disCoreOne(PDISCPUSTATE pCpu, RTUINTPTR InstructionAddr, unsigned *pcbInstruction);
49	#if !defined(DIS_CORE_ONLY) && defined(LOG_ENABLED)
50	static void disasmAddString(char psz, const char pszString);
51	static void disasmAddStringF(char psz, const char pszFormat, ...);
52	static void disasmAddChar(char *psz, char ch);
53	# define disasmAddStringF1(psz, pszFmt, a1) disasmAddStringF(psz, pszFmt, a1)
54	# define disasmAddStringF2(psz, pszFmt, a1, a2) disasmAddStringF(psz, pszFmt, a1, a2)
55	# define disasmAddStringF3(psz, pszFmt, a1, a2, a3) disasmAddStringF(psz, pszFmt, a1, a2, a3)
56	#else
57	# define disasmAddString(psz, pszString) do {} while (0)
58	# define disasmAddStringF1(psz, pszFmt, a1) do {} while (0)
59	# define disasmAddStringF2(psz, pszFmt, a1, a2) do {} while (0)
60	# define disasmAddStringF3(psz, pszFmt, a1, a2, a3) do {} while (0)
61	# define disasmAddChar(psz, ch) do {} while (0)
62	#endif
63
64	static unsigned QueryModRM(RTUINTPTR pu8CodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu, unsigned *pSibInc = NULL);
65	static unsigned QueryModRM_SizeOnly(RTUINTPTR pu8CodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu, unsigned *pSibInc = NULL);
66	static void UseSIB(RTUINTPTR pu8CodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu);
67	static unsigned ParseSIB_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu);
68
69	/*******************************************************************************
70	* Global Variables *
71	*******************************************************************************/
72
73	PFNDISPARSE pfnFullDisasm[IDX_ParseMax] =
74	{
75	ParseIllegal,
76	ParseModRM,
77	UseModRM,
78	ParseImmByte,
79	ParseImmBRel,
80	ParseImmUshort,
81	ParseImmV,
82	ParseImmVRel,
83	ParseImmAddr,
84	ParseFixedReg,
85	ParseImmUlong,
86	ParseImmQword,
87	ParseTwoByteEsc,
88	ParseImmGrpl,
89	ParseShiftGrp2,
90	ParseGrp3,
91	ParseGrp4,
92	ParseGrp5,
93	Parse3DNow,
94	ParseGrp6,
95	ParseGrp7,
96	ParseGrp8,
97	ParseGrp9,
98	ParseGrp10,
99	ParseGrp12,
100	ParseGrp13,
101	ParseGrp14,
102	ParseGrp15,
103	ParseGrp16,
104	ParseModFence,
105	ParseYv,
106	ParseYb,
107	ParseXv,
108	ParseXb,
109	ParseEscFP,
110	ParseNopPause,
111	ParseImmByteSX,
112	ParseImmZ,
113	ParseThreeByteEsc4,
114	ParseThreeByteEsc5
115	};
116
117	PFNDISPARSE pfnCalcSize[IDX_ParseMax] =
118	{
119	ParseIllegal,
120	ParseModRM_SizeOnly,
121	UseModRM,
122	ParseImmByte_SizeOnly,
123	ParseImmBRel_SizeOnly,
124	ParseImmUshort_SizeOnly,
125	ParseImmV_SizeOnly,
126	ParseImmVRel_SizeOnly,
127	ParseImmAddr_SizeOnly,
128	ParseFixedReg,
129	ParseImmUlong_SizeOnly,
130	ParseImmQword_SizeOnly,
131	ParseTwoByteEsc,
132	ParseImmGrpl,
133	ParseShiftGrp2,
134	ParseGrp3,
135	ParseGrp4,
136	ParseGrp5,
137	Parse3DNow,
138	ParseGrp6,
139	ParseGrp7,
140	ParseGrp8,
141	ParseGrp9,
142	ParseGrp10,
143	ParseGrp12,
144	ParseGrp13,
145	ParseGrp14,
146	ParseGrp15,
147	ParseGrp16,
148	ParseModFence,
149	ParseYv,
150	ParseYb,
151	ParseXv,
152	ParseXb,
153	ParseEscFP,
154	ParseNopPause,
155	ParseImmByteSX_SizeOnly,
156	ParseImmZ_SizeOnly,
157	ParseThreeByteEsc4,
158	ParseThreeByteEsc5
159	};
160
161	/**
162	* Parses one instruction.
163	* The result is found in pCpu.
164	*
165	* @returns Success indicator.
166	* @param pCpu Pointer to cpu structure which has DISCPUSTATE::mode set correctly.
167	* @param InstructionAddr Pointer to the instruction to parse.
168	* @param pcbInstruction Where to store the size of the instruction.
169	* NULL is allowed.
170	*/
171	DISDECL(int) DISCoreOne(PDISCPUSTATE pCpu, RTUINTPTR InstructionAddr, unsigned *pcbInstruction)
172	{
173	/*
174	* Reset instruction settings
175	*/
176	pCpu->prefix = PREFIX_NONE;
177	pCpu->enmPrefixSeg = DIS_SELREG_DS;
178	pCpu->lastprefix = 0;
179	pCpu->ModRM.u = 0;
180	pCpu->SIB.u = 0;
181	pCpu->param1.parval = 0;
182	pCpu->param2.parval = 0;
183	pCpu->param3.parval = 0;
184	pCpu->param1.szParam[0] = '\0';
185	pCpu->param2.szParam[0] = '\0';
186	pCpu->param3.szParam[0] = '\0';
187	pCpu->param1.flags = 0;
188	pCpu->param2.flags = 0;
189	pCpu->param3.flags = 0;
190	pCpu->param1.size = 0;
191	pCpu->param2.size = 0;
192	pCpu->param3.size = 0;
193	pCpu->pfnReadBytes = 0;
194	pCpu->uFilter = OPTYPE_ALL;
195	pCpu->pfnDisasmFnTable = pfnFullDisasm;
196
197	return RT_SUCCESS(disCoreOne(pCpu, InstructionAddr, pcbInstruction));
198	}
199
200	/**
201	* Parses one guest instruction.
202	* The result is found in pCpu and pcbInstruction.
203	*
204	* @returns VBox status code.
205	* @param InstructionAddr Address of the instruction to decode. What this means
206	* is left to the pfnReadBytes function.
207	* @param enmCpuMode The CPU mode. CPUMODE_32BIT, CPUMODE_16BIT, or CPUMODE_64BIT.
208	* @param pfnReadBytes Callback for reading instruction bytes.
209	* @param pvUser User argument for the instruction reader. (Ends up in apvUserData[0].)
210	* @param pCpu Pointer to cpu structure. Will be initialized.
211	* @param pcbInstruction Where to store the size of the instruction.
212	* NULL is allowed.
213	*/
214	DISDECL(int) DISCoreOneEx(RTUINTPTR InstructionAddr, DISCPUMODE enmCpuMode, PFN_DIS_READBYTES pfnReadBytes, void *pvUser,
215	PDISCPUSTATE pCpu, unsigned *pcbInstruction)
216	{
217	/*
218	* Reset instruction settings
219	*/
220	pCpu->prefix = PREFIX_NONE;
221	pCpu->enmPrefixSeg = DIS_SELREG_DS;
222	pCpu->lastprefix = 0;
223	pCpu->mode = enmCpuMode;
224	pCpu->ModRM.u = 0;
225	pCpu->SIB.u = 0;
226	pCpu->param1.parval = 0;
227	pCpu->param2.parval = 0;
228	pCpu->param3.parval = 0;
229	pCpu->param1.szParam[0] = '\0';
230	pCpu->param2.szParam[0] = '\0';
231	pCpu->param3.szParam[0] = '\0';
232	pCpu->param1.flags = 0;
233	pCpu->param2.flags = 0;
234	pCpu->param3.flags = 0;
235	pCpu->param1.size = 0;
236	pCpu->param2.size = 0;
237	pCpu->param3.size = 0;
238	pCpu->pfnReadBytes = pfnReadBytes;
239	pCpu->apvUserData[0] = pvUser;
240	pCpu->uFilter = OPTYPE_ALL;
241	pCpu->pfnDisasmFnTable = pfnFullDisasm;
242
243	return disCoreOne(pCpu, InstructionAddr, pcbInstruction);
244	}
245
246	/**
247	* Internal worker for DISCoreOne and DISCoreOneEx.
248	*
249	* @returns VBox status code.
250	* @param pCpu Initialized cpu state.
251	* @param InstructionAddr Instruction address.
252	* @param pcbInstruction Where to store the instruction size. Can be NULL.
253	*/
254	static int disCoreOne(PDISCPUSTATE pCpu, RTUINTPTR InstructionAddr, unsigned *pcbInstruction)
255	{
256	const OPCODE *paOneByteMap;
257
258	/*
259	* Parse byte by byte.
260	*/
261	unsigned iByte = 0;
262	unsigned cbInc;
263
264	if (pCpu->mode == CPUMODE_64BIT)
265	{
266	paOneByteMap = g_aOneByteMapX64;
267	pCpu->addrmode = CPUMODE_64BIT;
268	pCpu->opmode = CPUMODE_32BIT;
269	}
270	else
271	{
272	paOneByteMap = g_aOneByteMapX86;
273	pCpu->addrmode = pCpu->mode;
274	pCpu->opmode = pCpu->mode;
275	}
276
277	#ifdef IN_RING3
278	# ifndef __L4ENV__ /* Unfortunately, we have no exception handling in l4env */
279	try
280	# else
281	pCpu->pJumpBuffer = &jumpbuffer;
282	if (setjmp(jumpbuffer) == 0)
283	# endif
284	#endif
285	{
286	while(1)
287	{
288	uint8_t codebyte = DISReadByte(pCpu, InstructionAddr+iByte);
289	uint8_t opcode = paOneByteMap[codebyte].opcode;
290
291	/* Hardcoded assumption about OP_* values!! */
292	if (opcode <= OP_LAST_PREFIX)
293	{
294	/* The REX prefix must precede the opcode byte(s). Any other placement is ignored. */
295	if (opcode != OP_REX)
296	{
297	/** Last prefix byte (for SSE2 extension tables); don't include the REX prefix */
298	pCpu->lastprefix = opcode;
299	pCpu->prefix &= ~PREFIX_REX;
300	}
301
302	switch (opcode)
303	{
304	case OP_INVALID:
305	AssertMsgFailed(("Invalid opcode!!\n"));
306	return VERR_GENERAL_FAILURE; /** @todo better error code. */
307
308	// segment override prefix byte
309	case OP_SEG:
310	pCpu->enmPrefixSeg = (DIS_SELREG)(paOneByteMap[codebyte].param1 - OP_PARM_REG_SEG_START);
311	/* Segment prefixes for CS, DS, ES and SS are ignored in long mode. */
312	if ( pCpu->mode != CPUMODE_64BIT
313	\|\| pCpu->enmPrefixSeg >= DIS_SELREG_FS)
314	{
315	pCpu->prefix \|= PREFIX_SEG;
316	}
317	iByte += sizeof(uint8_t);
318	continue; //fetch the next byte
319
320	// lock prefix byte
321	case OP_LOCK:
322	pCpu->prefix \|= PREFIX_LOCK;
323	iByte += sizeof(uint8_t);
324	continue; //fetch the next byte
325
326	// address size override prefix byte
327	case OP_ADDRSIZE:
328	pCpu->prefix \|= PREFIX_ADDRSIZE;
329	if (pCpu->mode == CPUMODE_16BIT)
330	pCpu->addrmode = CPUMODE_32BIT;
331	else
332	if (pCpu->mode == CPUMODE_32BIT)
333	pCpu->addrmode = CPUMODE_16BIT;
334	else
335	pCpu->addrmode = CPUMODE_32BIT; /* 64 bits */
336
337	iByte += sizeof(uint8_t);
338	continue; //fetch the next byte
339
340	// operand size override prefix byte
341	case OP_OPSIZE:
342	pCpu->prefix \|= PREFIX_OPSIZE;
343	if (pCpu->mode == CPUMODE_16BIT)
344	pCpu->opmode = CPUMODE_32BIT;
345	else
346	pCpu->opmode = CPUMODE_16BIT; /* for 32 and 64 bits mode (there is no 32 bits operand size override prefix) */
347
348	iByte += sizeof(uint8_t);
349	continue; //fetch the next byte
350
351	// rep and repne are not really prefixes, but we'll treat them as such
352	case OP_REPE:
353	pCpu->prefix \|= PREFIX_REP;
354	iByte += sizeof(uint8_t);
355	continue; //fetch the next byte
356
357	case OP_REPNE:
358	pCpu->prefix \|= PREFIX_REPNE;
359	iByte += sizeof(uint8_t);
360	continue; //fetch the next byte
361
362	case OP_REX:
363	Assert(pCpu->mode == CPUMODE_64BIT);
364	/* REX prefix byte */
365	pCpu->prefix \|= PREFIX_REX;
366	pCpu->prefix_rex = PREFIX_REX_OP_2_FLAGS(paOneByteMap[codebyte].param1);
367	iByte += sizeof(uint8_t);
368
369	if (pCpu->prefix_rex & PREFIX_REX_FLAGS_W)
370	pCpu->opmode = CPUMODE_64BIT; /* overrides size prefix byte */
371	continue; //fetch the next byte
372	}
373	}
374
375	unsigned uIdx = iByte;
376	iByte += sizeof(uint8_t); //first opcode byte
377
378	pCpu->opaddr = InstructionAddr + uIdx;
379	pCpu->opcode = codebyte;
380
381	cbInc = ParseInstruction(InstructionAddr + iByte, &paOneByteMap[pCpu->opcode], pCpu);
382	iByte += cbInc;
383	break;
384	}
385	}
386	#ifdef IN_RING3
387	# ifndef __L4ENV__
388	catch(...)
389	# else
390	else /* setjmp has returned a non-zero value: an exception occurred */
391	# endif
392	{
393	pCpu->opsize = 0;
394	return VERR_DIS_GEN_FAILURE;
395	}
396	#endif
397
398	pCpu->opsize = iByte;
399	if (pcbInstruction)
400	*pcbInstruction = iByte;
401
402	if (pCpu->prefix & PREFIX_LOCK)
403	disValidateLockSequence(pCpu);
404
405	return VINF_SUCCESS;
406	}
407	//*****************************************************************************
408	//*****************************************************************************
409	unsigned ParseInstruction(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, PDISCPUSTATE pCpu)
410	{
411	int size = 0;
412	bool fFiltered = false;
413
414	Assert(lpszCodeBlock && pOp && pCpu);
415
416	// Store the opcode format string for disasmPrintf
417	#ifndef DIS_CORE_ONLY
418	pCpu->pszOpcode = pOp->pszOpcode;
419	#endif
420	pCpu->pCurInstr = pOp;
421
422	/*
423	* Apply filter to instruction type to determine if a full disassembly is required.
424	* @note Multibyte opcodes are always marked harmless until the final byte.
425	*/
426	if ((pOp->optype & pCpu->uFilter) == 0)
427	{
428	fFiltered = true;
429	pCpu->pfnDisasmFnTable = pfnCalcSize;
430	}
431	else
432	{
433	/* Not filtered out -> full disassembly */
434	pCpu->pfnDisasmFnTable = pfnFullDisasm;
435	}
436
437	// Should contain the parameter type on input
438	pCpu->param1.param = pOp->param1;
439	pCpu->param2.param = pOp->param2;
440	pCpu->param3.param = pOp->param3;
441
442	/* Correct the operand size if the instruction is marked as forced or default 64 bits */
443	if (pCpu->mode == CPUMODE_64BIT)
444	{
445	if (pOp->optype & OPTYPE_FORCED_64_OP_SIZE)
446	pCpu->opmode = CPUMODE_64BIT;
447	else
448	if ( (pOp->optype & OPTYPE_DEFAULT_64_OP_SIZE)
449	&& !(pCpu->prefix & PREFIX_OPSIZE))
450	pCpu->opmode = CPUMODE_64BIT;
451	}
452	else
453	if (pOp->optype & OPTYPE_FORCED_32_OP_SIZE_X86)
454	{
455	/* Forced 32 bits operand size for certain instructions (mov crx, mov drx). */
456	Assert(pCpu->mode != CPUMODE_64BIT);
457	pCpu->opmode = CPUMODE_32BIT;
458	}
459
460	if (pOp->idxParse1 != IDX_ParseNop)
461	{
462	size += pCpu->pfnDisasmFnTable[pOp->idxParse1](lpszCodeBlock, pOp, &pCpu->param1, pCpu);
463	if (fFiltered == false) pCpu->param1.size = DISGetParamSize(pCpu, &pCpu->param1);
464	}
465
466	if (pOp->idxParse2 != IDX_ParseNop)
467	{
468	size += pCpu->pfnDisasmFnTable[pOp->idxParse2](lpszCodeBlock+size, pOp, &pCpu->param2, pCpu);
469	if (fFiltered == false) pCpu->param2.size = DISGetParamSize(pCpu, &pCpu->param2);
470	}
471
472	if (pOp->idxParse3 != IDX_ParseNop)
473	{
474	size += pCpu->pfnDisasmFnTable[pOp->idxParse3](lpszCodeBlock+size, pOp, &pCpu->param3, pCpu);
475	if (fFiltered == false) pCpu->param3.size = DISGetParamSize(pCpu, &pCpu->param3);
476	}
477	// else simple one byte instruction
478
479	return size;
480	}
481	//*****************************************************************************
482	/* Floating point opcode parsing */
483	//*****************************************************************************
484	unsigned ParseEscFP(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
485	{
486	int index;
487	const OPCODE *fpop;
488	unsigned size = 0, ModRM;
489
490	ModRM = DISReadByte(pCpu, lpszCodeBlock);
491
492	index = pCpu->opcode - 0xD8;
493	if (ModRM <= 0xBF)
494	{
495	fpop = &(g_paMapX86_FP_Low[index])[MODRM_REG(ModRM)];
496	pCpu->pCurInstr = (PCOPCODE)fpop;
497
498	// Should contain the parameter type on input
499	pCpu->param1.param = fpop->param1;
500	pCpu->param2.param = fpop->param2;
501	}
502	else
503	{
504	fpop = &(g_paMapX86_FP_High[index])[ModRM - 0xC0];
505	pCpu->pCurInstr = (PCOPCODE)fpop;
506	}
507
508	/*
509	* Apply filter to instruction type to determine if a full disassembly is required.
510	* @note Multibyte opcodes are always marked harmless until the final byte.
511	*/
512	if ((fpop->optype & pCpu->uFilter) == 0)
513	{
514	pCpu->pfnDisasmFnTable = pfnCalcSize;
515	}
516	else
517	{
518	/* Not filtered out -> full disassembly */
519	pCpu->pfnDisasmFnTable = pfnFullDisasm;
520	}
521
522	/* Correct the operand size if the instruction is marked as forced or default 64 bits */
523	if (pCpu->mode == CPUMODE_64BIT)
524	{
525	/* Note: redundant, but just in case this ever changes */
526	if (fpop->optype & OPTYPE_FORCED_64_OP_SIZE)
527	pCpu->opmode = CPUMODE_64BIT;
528	else
529	if ( (fpop->optype & OPTYPE_DEFAULT_64_OP_SIZE)
530	&& !(pCpu->prefix & PREFIX_OPSIZE))
531	pCpu->opmode = CPUMODE_64BIT;
532	}
533
534	// Little hack to make sure the ModRM byte is included in the returned size
535	if (fpop->idxParse1 != IDX_ParseModRM && fpop->idxParse2 != IDX_ParseModRM)
536	size = sizeof(uint8_t); //ModRM byte
537
538	if (fpop->idxParse1 != IDX_ParseNop)
539	size += pCpu->pfnDisasmFnTable[fpop->idxParse1](lpszCodeBlock+size, (PCOPCODE)fpop, pParam, pCpu);
540
541	if (fpop->idxParse2 != IDX_ParseNop)
542	size += pCpu->pfnDisasmFnTable[fpop->idxParse2](lpszCodeBlock+size, (PCOPCODE)fpop, pParam, pCpu);
543
544	// Store the opcode format string for disasmPrintf
545	#ifndef DIS_CORE_ONLY
546	pCpu->pszOpcode = fpop->pszOpcode;
547	#endif
548
549	return size;
550	}
551	//*****************************************************************************
552	// SIB byte: (32 bits mode only)
553	// 7 - 6 5 - 3 2-0
554	// Scale Index Base
555	//*****************************************************************************
556	static const char *szSIBBaseReg[8] = {"EAX", "ECX", "EDX", "EBX", "ESP", "EBP", "ESI", "EDI"};
557	static const char *szSIBIndexReg[8] = {"EAX", "ECX", "EDX", "EBX", NULL, "EBP", "ESI", "EDI"};
558	static const char *szSIBBaseReg64[16] = {"RAX", "RCX", "RDX", "RBX", "RSP", "RBP", "RSI", "RDI", "R8", "R9", "R10", "R11", "R12", "R13", "R14", "R15"};
559	static const char *szSIBIndexReg64[16]= {"RAX", "RCX", "RDX", "RBX", NULL, "RBP", "RSI", "RDI", "R8", "R9", "R10", "R11", "R12", "R13", "R14", "R15"};
560	#if !defined(DIS_CORE_ONLY) && defined(LOG_ENABLED) \|\| defined(_MSC_VER)
561	static const char szSIBScale[4] = {"", "2", "4", "8"};
562	#endif
563	//*****************************************************************************
564	void UseSIB(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
565	{
566	unsigned scale, base, index, regtype;
567	const char **ppszSIBIndexReg;
568	const char **ppszSIBBaseReg;
569
570	scale = pCpu->SIB.Bits.Scale;
571	base = pCpu->SIB.Bits.Base;
572	index = pCpu->SIB.Bits.Index;
573
574	if (pCpu->addrmode == CPUMODE_32BIT)
575	{
576	ppszSIBIndexReg = szSIBIndexReg;
577	ppszSIBBaseReg = szSIBBaseReg;
578	regtype = USE_REG_GEN32;
579	}
580	else
581	{
582	ppszSIBIndexReg = szSIBIndexReg64;
583	ppszSIBBaseReg = szSIBBaseReg64;
584	regtype = USE_REG_GEN64;
585	}
586
587	if (ppszSIBIndexReg[index])
588	{
589	pParam->flags \|= USE_INDEX \| regtype;
590	pParam->index.reg_gen = index;
591
592	if (scale != 0)
593	{
594	pParam->flags \|= USE_SCALE;
595	pParam->scale = (1<<scale);
596	}
597
598	if (base == 5 && pCpu->ModRM.Bits.Mod == 0)
599	disasmAddStringF2(pParam->szParam, "%s%s", ppszSIBIndexReg[index], szSIBScale[scale]);
600	else
601	disasmAddStringF3(pParam->szParam, "%s+%s%s", ppszSIBBaseReg[base], ppszSIBIndexReg[index], szSIBScale[scale]);
602	}
603	else
604	{
605	if (base != 5 \|\| pCpu->ModRM.Bits.Mod != 0)
606	disasmAddStringF1(pParam->szParam, "%s", ppszSIBBaseReg[base]);
607	}
608
609	if (base == 5 && pCpu->ModRM.Bits.Mod == 0)
610	{
611	// [scaled index] + disp32
612	if (pCpu->addrmode == CPUMODE_32BIT)
613	{
614	pParam->flags \|= USE_DISPLACEMENT32;
615	pParam->disp32 = pCpu->disp;
616	disasmAddChar(pParam->szParam, '+');
617	disasmPrintDisp32(pParam);
618	}
619	else
620	{ /* sign-extend to 64 bits */
621	pParam->flags \|= USE_DISPLACEMENT64;
622	pParam->disp64 = pCpu->disp;
623	disasmAddChar(pParam->szParam, '+');
624	disasmPrintDisp64(pParam);
625	}
626	}
627	else
628	{
629	pParam->flags \|= USE_BASE \| regtype;
630	pParam->base.reg_gen = base;
631	}
632	return; /* Already fetched everything in ParseSIB; no size returned */
633	}
634	//*****************************************************************************
635	//*****************************************************************************
636	unsigned ParseSIB(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
637	{
638	unsigned size = sizeof(uint8_t);
639	unsigned SIB;
640
641	SIB = DISReadByte(pCpu, lpszCodeBlock);
642	lpszCodeBlock += size;
643
644	pCpu->SIB.Bits.Base = SIB_BASE(SIB);
645	pCpu->SIB.Bits.Index = SIB_INDEX(SIB);
646	pCpu->SIB.Bits.Scale = SIB_SCALE(SIB);
647
648	if (pCpu->prefix & PREFIX_REX)
649	{
650	/* REX.B extends the Base field if not scaled index + disp32 */
651	if (!(pCpu->SIB.Bits.Base == 5 && pCpu->ModRM.Bits.Mod == 0))
652	pCpu->SIB.Bits.Base \|= ((!!(pCpu->prefix_rex & PREFIX_REX_FLAGS_B)) << 3);
653
654	pCpu->SIB.Bits.Index \|= ((!!(pCpu->prefix_rex & PREFIX_REX_FLAGS_X)) << 3);
655	}
656
657	if ( pCpu->SIB.Bits.Base == 5
658	&& pCpu->ModRM.Bits.Mod == 0)
659	{
660	/* Additional 32 bits displacement. No change in long mode. */
661	pCpu->disp = DISReadDWord(pCpu, lpszCodeBlock);
662	size += sizeof(int32_t);
663	}
664	return size;
665	}
666	//*****************************************************************************
667	//*****************************************************************************
668	unsigned ParseSIB_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
669	{
670	unsigned size = sizeof(uint8_t);
671	unsigned SIB;
672
673	SIB = DISReadByte(pCpu, lpszCodeBlock);
674	lpszCodeBlock += size;
675
676	pCpu->SIB.Bits.Base = SIB_BASE(SIB);
677	pCpu->SIB.Bits.Index = SIB_INDEX(SIB);
678	pCpu->SIB.Bits.Scale = SIB_SCALE(SIB);
679
680	if (pCpu->prefix & PREFIX_REX)
681	{
682	/* REX.B extends the Base field. */
683	pCpu->SIB.Bits.Base \|= ((!!(pCpu->prefix_rex & PREFIX_REX_FLAGS_B)) << 3);
684	/* REX.X extends the Index field. */
685	pCpu->SIB.Bits.Index \|= ((!!(pCpu->prefix_rex & PREFIX_REX_FLAGS_X)) << 3);
686	}
687
688	if ( pCpu->SIB.Bits.Base == 5
689	&& pCpu->ModRM.Bits.Mod == 0)
690	{
691	/* Additional 32 bits displacement. No change in long mode. */
692	size += sizeof(int32_t);
693	}
694	return size;
695	}
696	//*****************************************************************************
697	// ModR/M byte:
698	// 7 - 6 5 - 3 2-0
699	// Mod Reg/Opcode R/M
700	//*****************************************************************************
701	unsigned UseModRM(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
702	{
703	int vtype = OP_PARM_VTYPE(pParam->param);
704	unsigned reg = pCpu->ModRM.Bits.Reg;
705	unsigned mod = pCpu->ModRM.Bits.Mod;
706	unsigned rm = pCpu->ModRM.Bits.Rm;
707
708	switch (vtype)
709	{
710	case OP_PARM_G: //general purpose register
711	disasmModRMReg(pCpu, pOp, reg, pParam, 0);
712	return 0;
713
714	default:
715	if (IS_OP_PARM_RARE(vtype))
716	{
717	switch (vtype)
718	{
719	case OP_PARM_C: //control register
720	pParam->flags \|= USE_REG_CR;
721
722	if ( pCpu->pCurInstr->opcode == OP_MOV_CR
723	&& pCpu->opmode == CPUMODE_32BIT
724	&& (pCpu->prefix & PREFIX_LOCK))
725	{
726	pCpu->prefix &= ~PREFIX_LOCK;
727	pParam->base.reg_ctrl = USE_REG_CR8;
728	}
729	else
730	pParam->base.reg_ctrl = reg;
731
732	disasmAddStringF1(pParam->szParam, "CR%d", pParam->base.reg_ctrl);
733	return 0;
734
735	case OP_PARM_D: //debug register
736	disasmAddStringF1(pParam->szParam, "DR%d", reg);
737	pParam->flags \|= USE_REG_DBG;
738	pParam->base.reg_dbg = reg;
739	return 0;
740
741	case OP_PARM_P: //MMX register
742	reg &= 7; /* REX.R has no effect here */
743	disasmAddStringF1(pParam->szParam, "MM%d", reg);
744	pParam->flags \|= USE_REG_MMX;
745	pParam->base.reg_mmx = reg;
746	return 0;
747
748	case OP_PARM_S: //segment register
749	reg &= 7; /* REX.R has no effect here */
750	disasmModRMSReg(pCpu, pOp, reg, pParam);
751	pParam->flags \|= USE_REG_SEG;
752	return 0;
753
754	case OP_PARM_T: //test register
755	reg &= 7; /* REX.R has no effect here */
756	disasmAddStringF1(pParam->szParam, "TR%d", reg);
757	pParam->flags \|= USE_REG_TEST;
758	pParam->base.reg_test = reg;
759	return 0;
760
761	case OP_PARM_W: //XMM register or memory operand
762	if (mod != 3)
763	break; /* memory operand */
764	reg = rm; /* the RM field specifies the xmm register */
765	/* else no break */
766
767	case OP_PARM_V: //XMM register
768	disasmAddStringF1(pParam->szParam, "XMM%d", reg);
769	pParam->flags \|= USE_REG_XMM;
770	pParam->base.reg_xmm = reg;
771	return 0;
772	}
773	}
774	}
775
776	/* @todo bound */
777
778	if (pCpu->addrmode != CPUMODE_16BIT)
779	{
780	Assert(pCpu->addrmode == CPUMODE_32BIT \|\| pCpu->addrmode == CPUMODE_64BIT);
781
782	/*
783	* Note: displacements in long mode are 8 or 32 bits and sign-extended to 64 bits
784	*/
785	switch (mod)
786	{
787	case 0: //effective address
788	disasmGetPtrString(pCpu, pOp, pParam);
789	disasmAddChar(pParam->szParam, '[');
790	if (rm == 4)
791	{ /* SIB byte follows ModRM */
792	UseSIB(lpszCodeBlock, pOp, pParam, pCpu);
793	}
794	else
795	if (rm == 5)
796	{
797	/* 32 bits displacement */
798	if (pCpu->mode != CPUMODE_64BIT)
799	{
800	pParam->flags \|= USE_DISPLACEMENT32;
801	pParam->disp32 = pCpu->disp;
802	disasmPrintDisp32(pParam);
803	}
804	else
805	{
806	pParam->flags \|= USE_RIPDISPLACEMENT32;
807	pParam->disp32 = pCpu->disp;
808	disasmAddString(pParam->szParam, "RIP+");
809	disasmPrintDisp32(pParam);
810	}
811	}
812	else {//register address
813	pParam->flags \|= USE_BASE;
814	disasmModRMReg(pCpu, pOp, rm, pParam, 1);
815	}
816	disasmAddChar(pParam->szParam, ']');
817	break;
818
819	case 1: //effective address + 8 bits displacement
820	disasmGetPtrString(pCpu, pOp, pParam);
821	disasmAddChar(pParam->szParam, '[');
822	if (rm == 4) {//SIB byte follows ModRM
823	UseSIB(lpszCodeBlock, pOp, pParam, pCpu);
824	}
825	else
826	{
827	pParam->flags \|= USE_BASE;
828	disasmModRMReg(pCpu, pOp, rm, pParam, 1);
829	}
830	pParam->disp8 = pCpu->disp;
831	pParam->flags \|= USE_DISPLACEMENT8;
832
833	if (pParam->disp8 != 0)
834	{
835	if (pParam->disp8 > 0)
836	disasmAddChar(pParam->szParam, '+');
837	disasmPrintDisp8(pParam);
838	}
839	disasmAddChar(pParam->szParam, ']');
840	break;
841
842	case 2: //effective address + 32 bits displacement
843	disasmGetPtrString(pCpu, pOp, pParam);
844	disasmAddChar(pParam->szParam, '[');
845	if (rm == 4) {//SIB byte follows ModRM
846	UseSIB(lpszCodeBlock, pOp, pParam, pCpu);
847	}
848	else
849	{
850	pParam->flags \|= USE_BASE;
851	disasmModRMReg(pCpu, pOp, rm, pParam, 1);
852	}
853	pParam->disp32 = pCpu->disp;
854	pParam->flags \|= USE_DISPLACEMENT32;
855
856	if (pParam->disp32 != 0)
857	{
858	disasmAddChar(pParam->szParam, '+');
859	disasmPrintDisp32(pParam);
860	}
861	disasmAddChar(pParam->szParam, ']');
862	break;
863
864	case 3: //registers
865	disasmModRMReg(pCpu, pOp, rm, pParam, 0);
866	break;
867	}
868	}
869	else
870	{//16 bits addressing mode
871	switch (mod)
872	{
873	case 0: //effective address
874	disasmGetPtrString(pCpu, pOp, pParam);
875	disasmAddChar(pParam->szParam, '[');
876	if (rm == 6)
877	{//16 bits displacement
878	pParam->disp16 = pCpu->disp;
879	pParam->flags \|= USE_DISPLACEMENT16;
880	disasmPrintDisp16(pParam);
881	}
882	else
883	{
884	pParam->flags \|= USE_BASE;
885	disasmModRMReg16(pCpu, pOp, rm, pParam);
886	}
887	disasmAddChar(pParam->szParam, ']');
888	break;
889
890	case 1: //effective address + 8 bits displacement
891	disasmGetPtrString(pCpu, pOp, pParam);
892	disasmAddChar(pParam->szParam, '[');
893	disasmModRMReg16(pCpu, pOp, rm, pParam);
894	pParam->disp8 = pCpu->disp;
895	pParam->flags \|= USE_BASE \| USE_DISPLACEMENT8;
896
897	if (pParam->disp8 != 0)
898	{
899	if (pParam->disp8 > 0)
900	disasmAddChar(pParam->szParam, '+');
901	disasmPrintDisp8(pParam);
902	}
903	disasmAddChar(pParam->szParam, ']');
904	break;
905
906	case 2: //effective address + 16 bits displacement
907	disasmGetPtrString(pCpu, pOp, pParam);
908	disasmAddChar(pParam->szParam, '[');
909	disasmModRMReg16(pCpu, pOp, rm, pParam);
910	pParam->disp16 = pCpu->disp;
911	pParam->flags \|= USE_BASE \| USE_DISPLACEMENT16;
912
913	if (pParam->disp16 != 0)
914	{
915	disasmAddChar(pParam->szParam, '+');
916	disasmPrintDisp16(pParam);
917	}
918	disasmAddChar(pParam->szParam, ']');
919	break;
920
921	case 3: //registers
922	disasmModRMReg(pCpu, pOp, rm, pParam, 0);
923	break;
924	}
925	}
926	return 0; //everything was already fetched in ParseModRM
927	}
928	//*****************************************************************************
929	// Query the size of the ModRM parameters and fetch the immediate data (if any)
930	//*****************************************************************************
931	unsigned QueryModRM(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu, unsigned *pSibInc)
932	{
933	unsigned sibinc;
934	unsigned size = 0;
935	// unsigned reg = pCpu->ModRM.Bits.Reg;
936	unsigned mod = pCpu->ModRM.Bits.Mod;
937	unsigned rm = pCpu->ModRM.Bits.Rm;
938
939	if (!pSibInc)
940	pSibInc = &sibinc;
941
942	*pSibInc = 0;
943
944	if (pCpu->addrmode != CPUMODE_16BIT)
945	{
946	Assert(pCpu->addrmode == CPUMODE_32BIT \|\| pCpu->addrmode == CPUMODE_64BIT);
947
948	/*
949	* Note: displacements in long mode are 8 or 32 bits and sign-extended to 64 bits
950	*/
951	if (mod != 3 && rm == 4)
952	{ /* SIB byte follows ModRM */
953	*pSibInc = ParseSIB(lpszCodeBlock, pOp, pParam, pCpu);
954	lpszCodeBlock += *pSibInc;
955	size += *pSibInc;
956	}
957
958	switch (mod)
959	{
960	case 0: /* Effective address */
961	if (rm == 5) { /* 32 bits displacement */
962	pCpu->disp = DISReadDWord(pCpu, lpszCodeBlock);
963	size += sizeof(int32_t);
964	}
965	/* else register address */
966	break;
967
968	case 1: /* Effective address + 8 bits displacement */
969	pCpu->disp = (int8_t)DISReadByte(pCpu, lpszCodeBlock);
970	size += sizeof(char);
971	break;
972
973	case 2: /* Effective address + 32 bits displacement */
974	pCpu->disp = DISReadDWord(pCpu, lpszCodeBlock);
975	size += sizeof(int32_t);
976	break;
977
978	case 3: /* registers */
979	break;
980	}
981	}
982	else
983	{
984	/* 16 bits mode */
985	switch (mod)
986	{
987	case 0: /* Effective address */
988	if (rm == 6) {
989	pCpu->disp = DISReadWord(pCpu, lpszCodeBlock);
990	size += sizeof(uint16_t);
991	}
992	/* else register address */
993	break;
994
995	case 1: /* Effective address + 8 bits displacement */
996	pCpu->disp = (int8_t)DISReadByte(pCpu, lpszCodeBlock);
997	size += sizeof(char);
998	break;
999
1000	case 2: /* Effective address + 32 bits displacement */
1001	pCpu->disp = (int16_t)DISReadWord(pCpu, lpszCodeBlock);
1002	size += sizeof(uint16_t);
1003	break;
1004
1005	case 3: /* registers */
1006	break;
1007	}
1008	}
1009	return size;
1010	}
1011	//*****************************************************************************
1012	// Query the size of the ModRM parameters and fetch the immediate data (if any)
1013	//*****************************************************************************
1014	unsigned QueryModRM_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu, unsigned *pSibInc)
1015	{
1016	unsigned sibinc;
1017	unsigned size = 0;
1018	// unsigned reg = pCpu->ModRM.Bits.Reg;
1019	unsigned mod = pCpu->ModRM.Bits.Mod;
1020	unsigned rm = pCpu->ModRM.Bits.Rm;
1021
1022	if (!pSibInc)
1023	pSibInc = &sibinc;
1024
1025	*pSibInc = 0;
1026
1027	if (pCpu->addrmode != CPUMODE_16BIT)
1028	{
1029	Assert(pCpu->addrmode == CPUMODE_32BIT \|\| pCpu->addrmode == CPUMODE_64BIT);
1030	/*
1031	* Note: displacements in long mode are 8 or 32 bits and sign-extended to 64 bits
1032	*/
1033	if (mod != 3 && rm == 4)
1034	{ /* SIB byte follows ModRM */
1035	*pSibInc = ParseSIB_SizeOnly(lpszCodeBlock, pOp, pParam, pCpu);
1036	lpszCodeBlock += *pSibInc;
1037	size += *pSibInc;
1038	}
1039
1040	switch (mod)
1041	{
1042	case 0: //effective address
1043	if (rm == 5) { /* 32 bits displacement */
1044	size += sizeof(int32_t);
1045	}
1046	/* else register address */
1047	break;
1048
1049	case 1: /* Effective address + 8 bits displacement */
1050	size += sizeof(char);
1051	break;
1052
1053	case 2: /* Effective address + 32 bits displacement */
1054	size += sizeof(int32_t);
1055	break;
1056
1057	case 3: /* registers */
1058	break;
1059	}
1060	}
1061	else
1062	{
1063	/* 16 bits mode */
1064	switch (mod)
1065	{
1066	case 0: //effective address
1067	if (rm == 6) {
1068	size += sizeof(uint16_t);
1069	}
1070	/* else register address */
1071	break;
1072
1073	case 1: /* Effective address + 8 bits displacement */
1074	size += sizeof(char);
1075	break;
1076
1077	case 2: /* Effective address + 32 bits displacement */
1078	size += sizeof(uint16_t);
1079	break;
1080
1081	case 3: /* registers */
1082	break;
1083	}
1084	}
1085	return size;
1086	}
1087	//*****************************************************************************
1088	//*****************************************************************************
1089	unsigned ParseIllegal(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1090	{
1091	AssertFailed();
1092	return 0;
1093	}
1094	//*****************************************************************************
1095	//*****************************************************************************
1096	unsigned ParseModRM(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1097	{
1098	unsigned size = sizeof(uint8_t); //ModRM byte
1099	unsigned sibinc, ModRM;
1100
1101	ModRM = DISReadByte(pCpu, lpszCodeBlock);
1102	lpszCodeBlock += sizeof(uint8_t);
1103
1104	pCpu->ModRM.Bits.Rm = MODRM_RM(ModRM);
1105	pCpu->ModRM.Bits.Mod = MODRM_MOD(ModRM);
1106	pCpu->ModRM.Bits.Reg = MODRM_REG(ModRM);
1107
1108	/* Disregard the mod bits for certain instructions (mov crx, mov drx).
1109	*
1110	* From the AMD manual:
1111	* This instruction is always treated as a register-to-register (MOD = 11) instruction, regardless of the
1112	* encoding of the MOD field in the MODR/M byte.
1113	*/
1114	if (pOp->optype & OPTYPE_MOD_FIXED_11)
1115	pCpu->ModRM.Bits.Mod = 3;
1116
1117	if (pCpu->prefix & PREFIX_REX)
1118	{
1119	Assert(pCpu->mode == CPUMODE_64BIT);
1120
1121	/* REX.R extends the Reg field. */
1122	pCpu->ModRM.Bits.Reg \|= ((!!(pCpu->prefix_rex & PREFIX_REX_FLAGS_R)) << 3);
1123
1124	/* REX.B extends the Rm field if there is no SIB byte nor a 32 bits displacement */
1125	if (!( pCpu->ModRM.Bits.Mod != 3
1126	&& pCpu->ModRM.Bits.Rm == 4)
1127	&&
1128	!( pCpu->ModRM.Bits.Mod == 0
1129	&& pCpu->ModRM.Bits.Rm == 5))
1130	{
1131	pCpu->ModRM.Bits.Rm \|= ((!!(pCpu->prefix_rex & PREFIX_REX_FLAGS_B)) << 3);
1132	}
1133	}
1134	size += QueryModRM(lpszCodeBlock, pOp, pParam, pCpu, &sibinc);
1135	lpszCodeBlock += sibinc;
1136
1137	UseModRM(lpszCodeBlock, pOp, pParam, pCpu);
1138	return size;
1139	}
1140	//*****************************************************************************
1141	//*****************************************************************************
1142	unsigned ParseModRM_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1143	{
1144	unsigned size = sizeof(uint8_t); //ModRM byte
1145	unsigned sibinc, ModRM;
1146
1147	ModRM = DISReadByte(pCpu, lpszCodeBlock);
1148	lpszCodeBlock += sizeof(uint8_t);
1149
1150	pCpu->ModRM.Bits.Rm = MODRM_RM(ModRM);
1151	pCpu->ModRM.Bits.Mod = MODRM_MOD(ModRM);
1152	pCpu->ModRM.Bits.Reg = MODRM_REG(ModRM);
1153
1154	/* Disregard the mod bits for certain instructions (mov crx, mov drx).
1155	*
1156	* From the AMD manual:
1157	* This instruction is always treated as a register-to-register (MOD = 11) instruction, regardless of the
1158	* encoding of the MOD field in the MODR/M byte.
1159	*/
1160	if (pOp->optype & OPTYPE_MOD_FIXED_11)
1161	pCpu->ModRM.Bits.Mod = 3;
1162
1163	if (pCpu->prefix & PREFIX_REX)
1164	{
1165	Assert(pCpu->mode == CPUMODE_64BIT);
1166
1167	/* REX.R extends the Reg field. */
1168	pCpu->ModRM.Bits.Reg \|= ((!!(pCpu->prefix_rex & PREFIX_REX_FLAGS_R)) << 3);
1169
1170	/* REX.B extends the Rm field if there is no SIB byte nor a 32 bits displacement */
1171	if (!( pCpu->ModRM.Bits.Mod != 3
1172	&& pCpu->ModRM.Bits.Rm == 4)
1173	&&
1174	!( pCpu->ModRM.Bits.Mod == 0
1175	&& pCpu->ModRM.Bits.Rm == 5))
1176	{
1177	pCpu->ModRM.Bits.Rm \|= ((!!(pCpu->prefix_rex & PREFIX_REX_FLAGS_B)) << 3);
1178	}
1179	}
1180
1181	size += QueryModRM_SizeOnly(lpszCodeBlock, pOp, pParam, pCpu, &sibinc);
1182	lpszCodeBlock += sibinc;
1183
1184	/* UseModRM is not necessary here; we're only interested in the opcode size */
1185	return size;
1186	}
1187	//*****************************************************************************
1188	//*****************************************************************************
1189	unsigned ParseModFence(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1190	{
1191	////AssertMsgFailed(("??\n"));
1192	//nothing to do apparently
1193	return 0;
1194	}
1195	//*****************************************************************************
1196	//*****************************************************************************
1197	unsigned ParseImmByte(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1198	{
1199	pParam->parval = DISReadByte(pCpu, lpszCodeBlock);
1200	pParam->flags \|= USE_IMMEDIATE8;
1201	pParam->size = sizeof(uint8_t);
1202
1203	disasmAddStringF1(pParam->szParam, "0%02Xh", (uint32_t)pParam->parval);
1204	return sizeof(uint8_t);
1205	}
1206	//*****************************************************************************
1207	//*****************************************************************************
1208	unsigned ParseImmByte_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1209	{
1210	return sizeof(uint8_t);
1211	}
1212	//*****************************************************************************
1213	//*****************************************************************************
1214	unsigned ParseImmByteSX(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1215	{
1216	if (pCpu->opmode == CPUMODE_32BIT)
1217	{
1218	pParam->parval = (uint32_t)(int8_t)DISReadByte(pCpu, lpszCodeBlock);
1219	pParam->flags \|= USE_IMMEDIATE32_SX8;
1220	pParam->size = sizeof(uint32_t);
1221	disasmAddStringF1(pParam->szParam, "0%08Xh", (uint32_t)pParam->parval);
1222	}
1223	else
1224	if (pCpu->opmode == CPUMODE_64BIT)
1225	{
1226	pParam->parval = (uint64_t)(int8_t)DISReadByte(pCpu, lpszCodeBlock);
1227	pParam->flags \|= USE_IMMEDIATE64_SX8;
1228	pParam->size = sizeof(uint64_t);
1229	disasmAddStringF1(pParam->szParam, "0%016RX64h", pParam->parval);
1230	}
1231	else
1232	{
1233	pParam->parval = (uint16_t)(int8_t)DISReadByte(pCpu, lpszCodeBlock);
1234	pParam->flags \|= USE_IMMEDIATE16_SX8;
1235	pParam->size = sizeof(uint16_t);
1236	disasmAddStringF1(pParam->szParam, "0%04Xh", (uint16_t)pParam->parval);
1237	}
1238	return sizeof(uint8_t);
1239	}
1240	//*****************************************************************************
1241	//*****************************************************************************
1242	unsigned ParseImmByteSX_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1243	{
1244	return sizeof(uint8_t);
1245	}
1246	//*****************************************************************************
1247	//*****************************************************************************
1248	unsigned ParseImmUshort(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1249	{
1250	pParam->parval = DISReadWord(pCpu, lpszCodeBlock);
1251	pParam->flags \|= USE_IMMEDIATE16;
1252	pParam->size = sizeof(uint16_t);
1253
1254	disasmAddStringF1(pParam->szParam, "0%04Xh", (uint16_t)pParam->parval);
1255	return sizeof(uint16_t);
1256	}
1257	//*****************************************************************************
1258	//*****************************************************************************
1259	unsigned ParseImmUshort_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1260	{
1261	return sizeof(uint16_t);
1262	}
1263	//*****************************************************************************
1264	//*****************************************************************************
1265	unsigned ParseImmUlong(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1266	{
1267	pParam->parval = DISReadDWord(pCpu, lpszCodeBlock);
1268	pParam->flags \|= USE_IMMEDIATE32;
1269	pParam->size = sizeof(uint32_t);
1270
1271	disasmAddStringF1(pParam->szParam, "0%08Xh", (uint32_t)pParam->parval);
1272	return sizeof(uint32_t);
1273	}
1274	//*****************************************************************************
1275	//*****************************************************************************
1276	unsigned ParseImmUlong_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1277	{
1278	return sizeof(uint32_t);
1279	}
1280	//*****************************************************************************
1281	//*****************************************************************************
1282	unsigned ParseImmQword(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1283	{
1284	pParam->parval = DISReadQWord(pCpu, lpszCodeBlock);
1285	pParam->flags \|= USE_IMMEDIATE64;
1286	pParam->size = sizeof(uint64_t);
1287
1288	disasmAddStringF2(pParam->szParam, "0%08X%08Xh",
1289	(uint32_t)pParam->parval, (uint32_t)(pParam->parval >> 32));
1290	return sizeof(uint64_t);
1291	}
1292	//*****************************************************************************
1293	//*****************************************************************************
1294	unsigned ParseImmQword_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1295	{
1296	return sizeof(uint64_t);
1297	}
1298	//*****************************************************************************
1299	//*****************************************************************************
1300	unsigned ParseImmV(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1301	{
1302	if (pCpu->opmode == CPUMODE_32BIT)
1303	{
1304	pParam->parval = DISReadDWord(pCpu, lpszCodeBlock);
1305	pParam->flags \|= USE_IMMEDIATE32;
1306	pParam->size = sizeof(uint32_t);
1307
1308	disasmAddStringF1(pParam->szParam, "0%08Xh", (uint32_t)pParam->parval);
1309	return sizeof(uint32_t);
1310	}
1311	else
1312	if (pCpu->opmode == CPUMODE_64BIT)
1313	{
1314	pParam->parval = DISReadQWord(pCpu, lpszCodeBlock);
1315	pParam->flags \|= USE_IMMEDIATE64;
1316	pParam->size = sizeof(uint64_t);
1317
1318	disasmAddStringF1(pParam->szParam, "0%RX64h", pParam->parval);
1319	return sizeof(uint64_t);
1320	}
1321	else
1322	{
1323	pParam->parval = DISReadWord(pCpu, lpszCodeBlock);
1324	pParam->flags \|= USE_IMMEDIATE16;
1325	pParam->size = sizeof(uint16_t);
1326
1327	disasmAddStringF1(pParam->szParam, "0%04Xh", (uint32_t)pParam->parval);
1328	return sizeof(uint16_t);
1329	}
1330	}
1331	//*****************************************************************************
1332	//*****************************************************************************
1333	unsigned ParseImmV_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1334	{
1335	if (pCpu->opmode == CPUMODE_32BIT)
1336	return sizeof(uint32_t);
1337	else
1338	if (pCpu->opmode == CPUMODE_64BIT)
1339	return sizeof(uint64_t);
1340
1341	return sizeof(uint16_t);
1342	}
1343	//*****************************************************************************
1344	//*****************************************************************************
1345	unsigned ParseImmZ(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1346	{
1347	/* Word for 16-bit operand-size or doubleword for 32 or 64-bit operand-size. */
1348	if (pCpu->opmode == CPUMODE_16BIT)
1349	{
1350	pParam->parval = DISReadWord(pCpu, lpszCodeBlock);
1351	pParam->flags \|= USE_IMMEDIATE16;
1352	pParam->size = sizeof(uint16_t);
1353
1354	disasmAddStringF1(pParam->szParam, "0%04Xh", (uint32_t)pParam->parval);
1355	return sizeof(uint16_t);
1356	}
1357	else
1358	{
1359	/* 64 bits op mode means sign extend to 64 bits. */
1360	if (pCpu->opmode == CPUMODE_64BIT)
1361	{
1362	pParam->parval = (uint64_t)(int32_t)DISReadDWord(pCpu, lpszCodeBlock);
1363	pParam->flags \|= USE_IMMEDIATE64;
1364	pParam->size = sizeof(uint64_t);
1365	disasmAddStringF1(pParam->szParam, "0%RX64h", pParam->parval);
1366	}
1367	else
1368	{
1369	pParam->parval = DISReadDWord(pCpu, lpszCodeBlock);
1370	pParam->flags \|= USE_IMMEDIATE32;
1371	pParam->size = sizeof(uint32_t);
1372	disasmAddStringF1(pParam->szParam, "0%08Xh", (uint32_t)pParam->parval);
1373	}
1374	return sizeof(uint32_t);
1375	}
1376	}
1377	//*****************************************************************************
1378	//*****************************************************************************
1379	unsigned ParseImmZ_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1380	{
1381	/* Word for 16-bit operand-size or doubleword for 32 or 64-bit operand-size. */
1382	if (pCpu->opmode == CPUMODE_16BIT)
1383	return sizeof(uint16_t);
1384	return sizeof(uint32_t);
1385	}
1386
1387	//*****************************************************************************
1388	// Relative displacement for branches (rel. to next instruction)
1389	//*****************************************************************************
1390	unsigned ParseImmBRel(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1391	{
1392	pParam->parval = DISReadByte(pCpu, lpszCodeBlock);
1393	pParam->flags \|= USE_IMMEDIATE8_REL;
1394	pParam->size = sizeof(uint8_t);
1395
1396	disasmAddStringF1(pParam->szParam, " (0%02Xh)", (uint32_t)pParam->parval);
1397	return sizeof(char);
1398	}
1399	//*****************************************************************************
1400	// Relative displacement for branches (rel. to next instruction)
1401	//*****************************************************************************
1402	unsigned ParseImmBRel_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1403	{
1404	return sizeof(char);
1405	}
1406	//*****************************************************************************
1407	// Relative displacement for branches (rel. to next instruction)
1408	//*****************************************************************************
1409	unsigned ParseImmVRel(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1410	{
1411	if (pCpu->opmode == CPUMODE_32BIT)
1412	{
1413	pParam->parval = DISReadDWord(pCpu, lpszCodeBlock);
1414	pParam->flags \|= USE_IMMEDIATE32_REL;
1415	pParam->size = sizeof(int32_t);
1416
1417	disasmAddStringF1(pParam->szParam, " (0%08Xh)", (uint32_t)pParam->parval);
1418	return sizeof(int32_t);
1419	}
1420	else
1421	if (pCpu->opmode == CPUMODE_64BIT)
1422	{
1423	/* 32 bits relative immediate sign extended to 64 bits. */
1424	pParam->parval = (uint64_t)(int32_t)DISReadDWord(pCpu, lpszCodeBlock);
1425	pParam->flags \|= USE_IMMEDIATE64_REL;
1426	pParam->size = sizeof(int64_t);
1427
1428	disasmAddStringF1(pParam->szParam, " (0%RX64h)", pParam->parval);
1429	return sizeof(int32_t);
1430	}
1431	else
1432	{
1433	pParam->parval = DISReadWord(pCpu, lpszCodeBlock);
1434	pParam->flags \|= USE_IMMEDIATE16_REL;
1435	pParam->size = sizeof(int16_t);
1436
1437	disasmAddStringF1(pParam->szParam, " (0%04Xh)", (uint32_t)pParam->parval);
1438	return sizeof(int16_t);
1439	}
1440	}
1441	//*****************************************************************************
1442	// Relative displacement for branches (rel. to next instruction)
1443	//*****************************************************************************
1444	unsigned ParseImmVRel_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1445	{
1446	if (pCpu->opmode == CPUMODE_16BIT)
1447	return sizeof(int16_t);
1448	/* Both 32 & 64 bits mode use 32 bits relative immediates. */
1449	return sizeof(int32_t);
1450	}
1451	//*****************************************************************************
1452	//*****************************************************************************
1453	unsigned ParseImmAddr(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1454	{
1455	disasmGetPtrString(pCpu, pOp, pParam);
1456	if (pCpu->addrmode == CPUMODE_32BIT)
1457	{
1458	if (OP_PARM_VSUBTYPE(pParam->param) == OP_PARM_p)
1459	{// far 16:32 pointer
1460	pParam->parval = DISReadDWord(pCpu, lpszCodeBlock);
1461	((uint32_t)&pParam->parval+1) = DISReadWord(pCpu, lpszCodeBlock+sizeof(uint32_t));
1462	pParam->flags \|= USE_IMMEDIATE_ADDR_16_32;
1463	pParam->size = sizeof(uint16_t) + sizeof(uint32_t);
1464
1465	disasmAddStringF2(pParam->szParam, "0%04X:0%08Xh", (uint32_t)(pParam->parval>>32), (uint32_t)pParam->parval);
1466	return sizeof(uint32_t) + sizeof(uint16_t);
1467	}
1468	else
1469	{// near 32 bits pointer
1470	/*
1471	* Note: used only in "mov al\|ax\|eax, [Addr]" and "mov [Addr], al\|ax\|eax"
1472	* so we treat it like displacement.
1473	*/
1474	pParam->disp32 = DISReadDWord(pCpu, lpszCodeBlock);
1475	pParam->flags \|= USE_DISPLACEMENT32;
1476	pParam->size = sizeof(uint32_t);
1477
1478	disasmAddStringF1(pParam->szParam, "[0%08Xh]", pParam->disp32);
1479	return sizeof(uint32_t);
1480	}
1481	}
1482	else
1483	if (pCpu->addrmode == CPUMODE_64BIT)
1484	{
1485	Assert(OP_PARM_VSUBTYPE(pParam->param) != OP_PARM_p);
1486	/* near 64 bits pointer */
1487	/*
1488	* Note: used only in "mov al\|ax\|eax, [Addr]" and "mov [Addr], al\|ax\|eax"
1489	* so we treat it like displacement.
1490	*/
1491	pParam->disp64 = DISReadQWord(pCpu, lpszCodeBlock);
1492	pParam->flags \|= USE_DISPLACEMENT64;
1493	pParam->size = sizeof(uint64_t);
1494
1495	disasmAddStringF2(pParam->szParam, "[0%08X%08Xh]", (uint32_t)(pParam->disp64 >> 32), (uint32_t)pParam->disp64);
1496	return sizeof(uint64_t);
1497	}
1498	else
1499	{
1500	if (OP_PARM_VSUBTYPE(pParam->param) == OP_PARM_p)
1501	{// far 16:16 pointer
1502	pParam->parval = DISReadDWord(pCpu, lpszCodeBlock);
1503	pParam->flags \|= USE_IMMEDIATE_ADDR_16_16;
1504	pParam->size = 2*sizeof(uint16_t);
1505
1506	disasmAddStringF2(pParam->szParam, "0%04X:0%04Xh", (uint32_t)(pParam->parval>>16), (uint16_t)pParam->parval );
1507	return sizeof(uint32_t);
1508	}
1509	else
1510	{// near 16 bits pointer
1511	/*
1512	* Note: used only in "mov al\|ax\|eax, [Addr]" and "mov [Addr], al\|ax\|eax"
1513	* so we treat it like displacement.
1514	*/
1515	pParam->disp16 = DISReadWord(pCpu, lpszCodeBlock);
1516	pParam->flags \|= USE_DISPLACEMENT16;
1517	pParam->size = sizeof(uint16_t);
1518
1519	disasmAddStringF1(pParam->szParam, "[0%04Xh]", (uint32_t)pParam->disp16);
1520	return sizeof(uint16_t);
1521	}
1522	}
1523	}
1524	//*****************************************************************************
1525	//*****************************************************************************
1526	unsigned ParseImmAddr_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1527	{
1528	if (pCpu->addrmode == CPUMODE_32BIT)
1529	{
1530	if (OP_PARM_VSUBTYPE(pParam->param) == OP_PARM_p)
1531	{// far 16:32 pointer
1532	return sizeof(uint32_t) + sizeof(uint16_t);
1533	}
1534	else
1535	{// near 32 bits pointer
1536	return sizeof(uint32_t);
1537	}
1538	}
1539	if (pCpu->addrmode == CPUMODE_64BIT)
1540	{
1541	Assert(OP_PARM_VSUBTYPE(pParam->param) != OP_PARM_p);
1542	return sizeof(uint64_t);
1543	}
1544	else
1545	{
1546	if (OP_PARM_VSUBTYPE(pParam->param) == OP_PARM_p)
1547	{// far 16:16 pointer
1548	return sizeof(uint32_t);
1549	}
1550	else
1551	{// near 16 bits pointer
1552	return sizeof(uint16_t);
1553	}
1554	}
1555	}
1556	//*****************************************************************************
1557	//*****************************************************************************
1558	unsigned ParseFixedReg(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1559	{
1560	/*
1561	* Sets up flags for stored in OPC fixed registers.
1562	*/
1563
1564	if (pParam->param == OP_PARM_NONE)
1565	{
1566	/* No parameter at all. */
1567	return 0;
1568	}
1569
1570	AssertCompile(OP_PARM_REG_GEN32_END < OP_PARM_REG_SEG_END);
1571	AssertCompile(OP_PARM_REG_SEG_END < OP_PARM_REG_GEN16_END);
1572	AssertCompile(OP_PARM_REG_GEN16_END < OP_PARM_REG_GEN8_END);
1573	AssertCompile(OP_PARM_REG_GEN8_END < OP_PARM_REG_FP_END);
1574
1575	if (pParam->param <= OP_PARM_REG_GEN32_END)
1576	{
1577	/* 32-bit EAX..EDI registers. */
1578	if (pCpu->opmode == CPUMODE_32BIT)
1579	{
1580	/* Use 32-bit registers. */
1581	pParam->base.reg_gen = pParam->param - OP_PARM_REG_GEN32_START;
1582	pParam->flags \|= USE_REG_GEN32;
1583	pParam->size = 4;
1584	}
1585	else
1586	if (pCpu->opmode == CPUMODE_64BIT)
1587	{
1588	/* Use 64-bit registers. */
1589	pParam->base.reg_gen = pParam->param - OP_PARM_REG_GEN32_START;
1590	if ( (pOp->optype & OPTYPE_REXB_EXTENDS_OPREG)
1591	&& pParam == &pCpu->param1 /* ugly assumption that it only applies to the first parameter */
1592	&& (pCpu->prefix & PREFIX_REX)
1593	&& (pCpu->prefix_rex & PREFIX_REX_FLAGS))
1594	pParam->base.reg_gen += 8;
1595
1596	pParam->flags \|= USE_REG_GEN64;
1597	pParam->size = 8;
1598	}
1599	else
1600	{
1601	/* Use 16-bit registers. */
1602	pParam->base.reg_gen = pParam->param - OP_PARM_REG_GEN32_START;
1603	pParam->flags \|= USE_REG_GEN16;
1604	pParam->size = 2;
1605	pParam->param = pParam->param - OP_PARM_REG_GEN32_START + OP_PARM_REG_GEN16_START;
1606	}
1607	}
1608	else
1609	if (pParam->param <= OP_PARM_REG_SEG_END)
1610	{
1611	/* Segment ES..GS registers. */
1612	pParam->base.reg_seg = (DIS_SELREG)(pParam->param - OP_PARM_REG_SEG_START);
1613	pParam->flags \|= USE_REG_SEG;
1614	pParam->size = 2;
1615	}
1616	else
1617	if (pParam->param <= OP_PARM_REG_GEN16_END)
1618	{
1619	/* 16-bit AX..DI registers. */
1620	pParam->base.reg_gen = pParam->param - OP_PARM_REG_GEN16_START;
1621	pParam->flags \|= USE_REG_GEN16;
1622	pParam->size = 2;
1623	}
1624	else
1625	if (pParam->param <= OP_PARM_REG_GEN8_END)
1626	{
1627	/* 8-bit AL..DL, AH..DH registers. */
1628	pParam->base.reg_gen = pParam->param - OP_PARM_REG_GEN8_START;
1629	pParam->flags \|= USE_REG_GEN8;
1630	pParam->size = 1;
1631
1632	if (pCpu->opmode == CPUMODE_64BIT)
1633	{
1634	if ( (pOp->optype & OPTYPE_REXB_EXTENDS_OPREG)
1635	&& pParam == &pCpu->param1 /* ugly assumption that it only applies to the first parameter */
1636	&& (pCpu->prefix & PREFIX_REX)
1637	&& (pCpu->prefix_rex & PREFIX_REX_FLAGS))
1638	pParam->base.reg_gen += 8; /* least significant byte of R8-R15 */
1639	}
1640	}
1641	else
1642	if (pParam->param <= OP_PARM_REG_FP_END)
1643	{
1644	/* FPU registers. */
1645	pParam->base.reg_fp = pParam->param - OP_PARM_REG_FP_START;
1646	pParam->flags \|= USE_REG_FP;
1647	pParam->size = 10;
1648	}
1649	Assert(!(pParam->param >= OP_PARM_REG_GEN64_START && pParam->param <= OP_PARM_REG_GEN64_END));
1650
1651	/* else - not supported for now registers. */
1652
1653	return 0;
1654	}
1655	//*****************************************************************************
1656	//*****************************************************************************
1657	unsigned ParseXv(RTUINTPTR pu8CodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1658	{
1659	disasmGetPtrString(pCpu, pOp, pParam);
1660	disasmAddString(pParam->szParam, (pCpu->addrmode == CPUMODE_32BIT) ? "DS:ESI" : "DS:SI");
1661
1662	pParam->flags \|= USE_POINTER_DS_BASED;
1663	if (pCpu->addrmode == CPUMODE_32BIT)
1664	{
1665	pParam->base.reg_gen = USE_REG_ESI;
1666	pParam->flags \|= USE_REG_GEN32;
1667	}
1668	else
1669	if (pCpu->addrmode == CPUMODE_64BIT)
1670	{
1671	pParam->base.reg_gen = USE_REG_RSI;
1672	pParam->flags \|= USE_REG_GEN64;
1673	}
1674	else
1675	{
1676	pParam->base.reg_gen = USE_REG_SI;
1677	pParam->flags \|= USE_REG_GEN16;
1678	}
1679	return 0; //no additional opcode bytes
1680	}
1681	//*****************************************************************************
1682	//*****************************************************************************
1683	unsigned ParseXb(RTUINTPTR pu8CodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1684	{
1685	disasmAddString(pParam->szParam, (pCpu->addrmode == CPUMODE_32BIT) ? "DS:ESI" : "DS:SI");
1686
1687	pParam->flags \|= USE_POINTER_DS_BASED;
1688	if (pCpu->addrmode == CPUMODE_32BIT)
1689	{
1690	pParam->base.reg_gen = USE_REG_ESI;
1691	pParam->flags \|= USE_REG_GEN32;
1692	}
1693	else
1694	if (pCpu->addrmode == CPUMODE_64BIT)
1695	{
1696	pParam->base.reg_gen = USE_REG_RSI;
1697	pParam->flags \|= USE_REG_GEN64;
1698	}
1699	else
1700	{
1701	pParam->base.reg_gen = USE_REG_SI;
1702	pParam->flags \|= USE_REG_GEN16;
1703	}
1704	return 0; //no additional opcode bytes
1705	}
1706	//*****************************************************************************
1707	//*****************************************************************************
1708	unsigned ParseYv(RTUINTPTR pu8CodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1709	{
1710	disasmGetPtrString(pCpu, pOp, pParam);
1711	disasmAddString(pParam->szParam, (pCpu->addrmode == CPUMODE_32BIT) ? "ES:EDI" : "ES:DI");
1712
1713	pParam->flags \|= USE_POINTER_ES_BASED;
1714	if (pCpu->addrmode == CPUMODE_32BIT)
1715	{
1716	pParam->base.reg_gen = USE_REG_EDI;
1717	pParam->flags \|= USE_REG_GEN32;
1718	}
1719	else
1720	if (pCpu->addrmode == CPUMODE_64BIT)
1721	{
1722	pParam->base.reg_gen = USE_REG_RDI;
1723	pParam->flags \|= USE_REG_GEN64;
1724	}
1725	else
1726	{
1727	pParam->base.reg_gen = USE_REG_DI;
1728	pParam->flags \|= USE_REG_GEN16;
1729	}
1730	return 0; //no additional opcode bytes
1731	}
1732	//*****************************************************************************
1733	//*****************************************************************************
1734	unsigned ParseYb(RTUINTPTR pu8CodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1735	{
1736	disasmAddString(pParam->szParam, (pCpu->addrmode == CPUMODE_32BIT) ? "ES:EDI" : "ES:DI");
1737
1738	pParam->flags \|= USE_POINTER_ES_BASED;
1739	if (pCpu->addrmode == CPUMODE_32BIT)
1740	{
1741	pParam->base.reg_gen = USE_REG_EDI;
1742	pParam->flags \|= USE_REG_GEN32;
1743	}
1744	else
1745	if (pCpu->addrmode == CPUMODE_64BIT)
1746	{
1747	pParam->base.reg_gen = USE_REG_RDI;
1748	pParam->flags \|= USE_REG_GEN64;
1749	}
1750	else
1751	{
1752	pParam->base.reg_gen = USE_REG_DI;
1753	pParam->flags \|= USE_REG_GEN16;
1754	}
1755	return 0; //no additional opcode bytes
1756	}
1757	//*****************************************************************************
1758	//*****************************************************************************
1759	unsigned ParseTwoByteEsc(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1760	{
1761	const OPCODE *pOpcode;
1762	int size = sizeof(uint8_t);
1763
1764	/* 2nd byte */
1765	pCpu->opcode = DISReadByte(pCpu, lpszCodeBlock);
1766
1767	/* default to the non-prefixed table. */
1768	pOpcode = &g_aTwoByteMapX86[pCpu->opcode];
1769
1770	/* Handle opcode table extensions that rely on the address, repe or repne prefix byte. */
1771	/** @todo Should we take the first or last prefix byte in case of multiple prefix bytes??? */
1772	if (pCpu->lastprefix)
1773	{
1774	switch (pCpu->lastprefix)
1775	{
1776	case OP_OPSIZE: /* 0x66 */
1777	if (g_aTwoByteMapX86_PF66[pCpu->opcode].opcode != OP_INVALID)
1778	{
1779	/* Table entry is valid, so use the extension table. */
1780	pOpcode = &g_aTwoByteMapX86_PF66[pCpu->opcode];
1781
1782	/* Cancel prefix changes. */
1783	pCpu->prefix &= ~PREFIX_OPSIZE;
1784	pCpu->opmode = pCpu->mode;
1785	}
1786	break;
1787
1788	case OP_REPNE: /* 0xF2 */
1789	if (g_aTwoByteMapX86_PFF2[pCpu->opcode].opcode != OP_INVALID)
1790	{
1791	/* Table entry is valid, so use the extension table. */
1792	pOpcode = &g_aTwoByteMapX86_PFF2[pCpu->opcode];
1793
1794	/* Cancel prefix changes. */
1795	pCpu->prefix &= ~PREFIX_REPNE;
1796	}
1797	break;
1798
1799	case OP_REPE: /* 0xF3 */
1800	if (g_aTwoByteMapX86_PFF3[pCpu->opcode].opcode != OP_INVALID)
1801	{
1802	/* Table entry is valid, so use the extension table. */
1803	pOpcode = &g_aTwoByteMapX86_PFF3[pCpu->opcode];
1804
1805	/* Cancel prefix changes. */
1806	pCpu->prefix &= ~PREFIX_REP;
1807	}
1808	break;
1809	}
1810	}
1811
1812	size += ParseInstruction(lpszCodeBlock+size, pOpcode, pCpu);
1813	return size;
1814	}
1815	//*****************************************************************************
1816	//*****************************************************************************
1817	unsigned ParseThreeByteEsc4(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1818	{
1819	const OPCODE *pOpcode;
1820	int size = sizeof(uint8_t);
1821
1822	/* 3rd byte */
1823	pCpu->opcode = DISReadByte(pCpu, lpszCodeBlock);
1824
1825	/* default to the non-prefixed table. */
1826	if (g_apThreeByteMapX86_0F38[pCpu->opcode >> 4])
1827	{
1828	pOpcode = g_apThreeByteMapX86_0F38[pCpu->opcode >> 4];
1829	pOpcode = &pOpcode[pCpu->opcode & 0xf];
1830	}
1831	else
1832	pOpcode = &g_InvalidOpcode[0];
1833
1834	/* Handle opcode table extensions that rely on the address, repne prefix byte. */
1835	/** @todo Should we take the first or last prefix byte in case of multiple prefix bytes??? */
1836	switch (pCpu->lastprefix)
1837	{
1838	case OP_OPSIZE: /* 0x66 */
1839	if (g_apThreeByteMapX86_660F38[pCpu->opcode >> 4])
1840	{
1841	pOpcode = g_apThreeByteMapX86_660F38[pCpu->opcode >> 4];
1842	pOpcode = &pOpcode[pCpu->opcode & 0xf];
1843
1844	if (pOpcode->opcode != OP_INVALID)
1845	{
1846	/* Table entry is valid, so use the extension table. */
1847
1848	/* Cancel prefix changes. */
1849	pCpu->prefix &= ~PREFIX_OPSIZE;
1850	pCpu->opmode = pCpu->mode;
1851	}
1852	}
1853	break;
1854
1855	case OP_REPNE: /* 0xF2 */
1856	if (g_apThreeByteMapX86_F20F38[pCpu->opcode >> 4])
1857	{
1858	pOpcode = g_apThreeByteMapX86_F20F38[pCpu->opcode >> 4];
1859	pOpcode = &pOpcode[pCpu->opcode & 0xf];
1860
1861	if (pOpcode->opcode != OP_INVALID)
1862	{
1863	/* Table entry is valid, so use the extension table. */
1864
1865	/* Cancel prefix changes. */
1866	pCpu->prefix &= ~PREFIX_REPNE;
1867	}
1868	}
1869	break;
1870	}
1871
1872	size += ParseInstruction(lpszCodeBlock+size, pOpcode, pCpu);
1873	return size;
1874	}
1875	//*****************************************************************************
1876	//*****************************************************************************
1877	unsigned ParseThreeByteEsc5(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1878	{
1879	const OPCODE *pOpcode;
1880	int size = sizeof(uint8_t);
1881
1882	/* 3rd byte */
1883	pCpu->opcode = DISReadByte(pCpu, lpszCodeBlock);
1884
1885	/** @todo Should we take the first or last prefix byte in case of multiple prefix bytes??? */
1886	Assert(pCpu->lastprefix == OP_OPSIZE);
1887
1888	/* default to the non-prefixed table. */
1889	if (g_apThreeByteMapX86_660F3A[pCpu->opcode >> 4])
1890	{
1891	pOpcode = g_apThreeByteMapX86_660F3A[pCpu->opcode >> 4];
1892	pOpcode = &pOpcode[pCpu->opcode & 0xf];
1893
1894	if (pOpcode->opcode != OP_INVALID)
1895	{
1896	/* Table entry is valid, so use the extension table. */
1897
1898	/* Cancel prefix changes. */
1899	pCpu->prefix &= ~PREFIX_OPSIZE;
1900	pCpu->opmode = pCpu->mode;
1901	}
1902	}
1903	else
1904	pOpcode = &g_InvalidOpcode[0];
1905
1906	size += ParseInstruction(lpszCodeBlock+size, pOpcode, pCpu);
1907	return size;
1908	}
1909	//*****************************************************************************
1910	//*****************************************************************************
1911	unsigned ParseNopPause(RTUINTPTR pu8CodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1912	{
1913	unsigned size = 0;
1914
1915	if (pCpu->prefix & PREFIX_REP)
1916	{
1917	pOp = &g_aMapX86_NopPause[1]; /* PAUSE */
1918	pCpu->prefix &= ~PREFIX_REP;
1919	}
1920	else
1921	pOp = &g_aMapX86_NopPause[0]; /* NOP */
1922
1923	size += ParseInstruction(pu8CodeBlock, pOp, pCpu);
1924	return size;
1925	}
1926	//*****************************************************************************
1927	//*****************************************************************************
1928	unsigned ParseImmGrpl(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1929	{
1930	int idx = (pCpu->opcode - 0x80) * 8;
1931	unsigned size = 0, modrm, reg;
1932
1933	modrm = DISReadByte(pCpu, lpszCodeBlock);
1934	reg = MODRM_REG(modrm);
1935
1936	pOp = (PCOPCODE)&g_aMapX86_Group1[idx+reg];
1937	//little hack to make sure the ModRM byte is included in the returned size
1938	if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM)
1939	size = sizeof(uint8_t); //ModRM byte
1940
1941	size += ParseInstruction(lpszCodeBlock, pOp, pCpu);
1942
1943	return size;
1944	}
1945	//*****************************************************************************
1946	//*****************************************************************************
1947	unsigned ParseShiftGrp2(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1948	{
1949	int idx;
1950	unsigned size = 0, modrm, reg;
1951
1952	switch (pCpu->opcode)
1953	{
1954	case 0xC0:
1955	case 0xC1:
1956	idx = (pCpu->opcode - 0xC0)*8;
1957	break;
1958
1959	case 0xD0:
1960	case 0xD1:
1961	case 0xD2:
1962	case 0xD3:
1963	idx = (pCpu->opcode - 0xD0 + 2)*8;
1964	break;
1965
1966	default:
1967	AssertMsgFailed(("Oops\n"));
1968	return sizeof(uint8_t);
1969	}
1970
1971	modrm = DISReadByte(pCpu, lpszCodeBlock);
1972	reg = MODRM_REG(modrm);
1973
1974	pOp = (PCOPCODE)&g_aMapX86_Group2[idx+reg];
1975
1976	//little hack to make sure the ModRM byte is included in the returned size
1977	if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM)
1978	size = sizeof(uint8_t); //ModRM byte
1979
1980	size += ParseInstruction(lpszCodeBlock, pOp, pCpu);
1981
1982	return size;
1983	}
1984	//*****************************************************************************
1985	//*****************************************************************************
1986	unsigned ParseGrp3(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
1987	{
1988	int idx = (pCpu->opcode - 0xF6) * 8;
1989	unsigned size = 0, modrm, reg;
1990
1991	modrm = DISReadByte(pCpu, lpszCodeBlock);
1992	reg = MODRM_REG(modrm);
1993
1994	pOp = (PCOPCODE)&g_aMapX86_Group3[idx+reg];
1995
1996	//little hack to make sure the ModRM byte is included in the returned size
1997	if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM)
1998	size = sizeof(uint8_t); //ModRM byte
1999
2000	size += ParseInstruction(lpszCodeBlock, pOp, pCpu);
2001
2002	return size;
2003	}
2004	//*****************************************************************************
2005	//*****************************************************************************
2006	unsigned ParseGrp4(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
2007	{
2008	unsigned size = 0, modrm, reg;
2009
2010	modrm = DISReadByte(pCpu, lpszCodeBlock);
2011	reg = MODRM_REG(modrm);
2012
2013	pOp = (PCOPCODE)&g_aMapX86_Group4[reg];
2014
2015	//little hack to make sure the ModRM byte is included in the returned size
2016	if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM)
2017	size = sizeof(uint8_t); //ModRM byte
2018
2019	size += ParseInstruction(lpszCodeBlock, pOp, pCpu);
2020
2021	return size;
2022	}
2023	//*****************************************************************************
2024	//*****************************************************************************
2025	unsigned ParseGrp5(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
2026	{
2027	unsigned size = 0, modrm, reg;
2028
2029	modrm = DISReadByte(pCpu, lpszCodeBlock);
2030	reg = MODRM_REG(modrm);
2031
2032	pOp = (PCOPCODE)&g_aMapX86_Group5[reg];
2033
2034	//little hack to make sure the ModRM byte is included in the returned size
2035	if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM)
2036	size = sizeof(uint8_t); //ModRM byte
2037
2038	size += ParseInstruction(lpszCodeBlock, pOp, pCpu);
2039
2040	return size;
2041	}
2042	//*****************************************************************************
2043	// 0xF 0xF [ModRM] [SIB] [displacement] imm8_opcode
2044	// It would appear the ModRM byte must always be present. How else can you
2045	// determine the offset of the imm8_opcode byte otherwise?
2046	//
2047	//*****************************************************************************
2048	unsigned Parse3DNow(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
2049	{
2050	unsigned size = 0, modrmsize;
2051
2052	#ifdef DEBUG_Sander
2053	//needs testing
2054	AssertMsgFailed(("Test me\n"));
2055	#endif
2056
2057	unsigned ModRM = DISReadByte(pCpu, lpszCodeBlock);
2058	pCpu->ModRM.Bits.Rm = MODRM_RM(ModRM);
2059	pCpu->ModRM.Bits.Mod = MODRM_MOD(ModRM);
2060	pCpu->ModRM.Bits.Reg = MODRM_REG(ModRM);
2061
2062	modrmsize = QueryModRM(lpszCodeBlock+sizeof(uint8_t), pOp, pParam, pCpu);
2063
2064	uint8_t opcode = DISReadByte(pCpu, lpszCodeBlock+sizeof(uint8_t)+modrmsize);
2065
2066	pOp = (PCOPCODE)&g_aTwoByteMapX86_3DNow[opcode];
2067
2068	//little hack to make sure the ModRM byte is included in the returned size
2069	if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM)
2070	{
2071	#ifdef DEBUG_Sander /* bird, 2005-06-28: Alex is getting this during full installation of win2ksp4. */
2072	AssertMsgFailed(("Oops!\n")); //shouldn't happen!
2073	#endif
2074	size = sizeof(uint8_t); //ModRM byte
2075	}
2076
2077	size += ParseInstruction(lpszCodeBlock, pOp, pCpu);
2078	size += sizeof(uint8_t); //imm8_opcode uint8_t
2079
2080	return size;
2081	}
2082	//*****************************************************************************
2083	//*****************************************************************************
2084	unsigned ParseGrp6(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
2085	{
2086	unsigned size = 0, modrm, reg;
2087
2088	modrm = DISReadByte(pCpu, lpszCodeBlock);
2089	reg = MODRM_REG(modrm);
2090
2091	pOp = (PCOPCODE)&g_aMapX86_Group6[reg];
2092
2093	//little hack to make sure the ModRM byte is included in the returned size
2094	if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM)
2095	size = sizeof(uint8_t); //ModRM byte
2096
2097	size += ParseInstruction(lpszCodeBlock, pOp, pCpu);
2098
2099	return size;
2100	}
2101	//*****************************************************************************
2102	//*****************************************************************************
2103	unsigned ParseGrp7(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
2104	{
2105	unsigned size = 0, modrm, reg, rm, mod;
2106
2107	modrm = DISReadByte(pCpu, lpszCodeBlock);
2108	mod = MODRM_MOD(modrm);
2109	reg = MODRM_REG(modrm);
2110	rm = MODRM_RM(modrm);
2111
2112	if (mod == 3 && rm == 0)
2113	pOp = (PCOPCODE)&g_aMapX86_Group7_mod11_rm000[reg];
2114	else
2115	if (mod == 3 && rm == 1)
2116	pOp = (PCOPCODE)&g_aMapX86_Group7_mod11_rm001[reg];
2117	else
2118	pOp = (PCOPCODE)&g_aMapX86_Group7_mem[reg];
2119
2120	//little hack to make sure the ModRM byte is included in the returned size
2121	if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM)
2122	size = sizeof(uint8_t); //ModRM byte
2123
2124	size += ParseInstruction(lpszCodeBlock, pOp, pCpu);
2125
2126	return size;
2127	}
2128	//*****************************************************************************
2129	//*****************************************************************************
2130	unsigned ParseGrp8(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
2131	{
2132	unsigned size = 0, modrm, reg;
2133
2134	modrm = DISReadByte(pCpu, lpszCodeBlock);
2135	reg = MODRM_REG(modrm);
2136
2137	pOp = (PCOPCODE)&g_aMapX86_Group8[reg];
2138
2139	//little hack to make sure the ModRM byte is included in the returned size
2140	if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM)
2141	size = sizeof(uint8_t); //ModRM byte
2142
2143	size += ParseInstruction(lpszCodeBlock, pOp, pCpu);
2144
2145	return size;
2146	}
2147	//*****************************************************************************
2148	//*****************************************************************************
2149	unsigned ParseGrp9(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
2150	{
2151	unsigned size = 0, modrm, reg;
2152
2153	modrm = DISReadByte(pCpu, lpszCodeBlock);
2154	reg = MODRM_REG(modrm);
2155
2156	pOp = (PCOPCODE)&g_aMapX86_Group9[reg];
2157
2158	//little hack to make sure the ModRM byte is included in the returned size
2159	if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM)
2160	size = sizeof(uint8_t); //ModRM byte
2161
2162	size += ParseInstruction(lpszCodeBlock, pOp, pCpu);
2163
2164	return size;
2165	}
2166	//*****************************************************************************
2167	//*****************************************************************************
2168	unsigned ParseGrp10(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
2169	{
2170	unsigned size = 0, modrm, reg;
2171
2172	modrm = DISReadByte(pCpu, lpszCodeBlock);
2173	reg = MODRM_REG(modrm);
2174
2175	pOp = (PCOPCODE)&g_aMapX86_Group10[reg];
2176
2177	//little hack to make sure the ModRM byte is included in the returned size
2178	if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM)
2179	size = sizeof(uint8_t); //ModRM byte
2180
2181	size += ParseInstruction(lpszCodeBlock, pOp, pCpu);
2182
2183	return size;
2184	}
2185	//*****************************************************************************
2186	//*****************************************************************************
2187	unsigned ParseGrp12(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
2188	{
2189	unsigned size = 0, modrm, reg;
2190
2191	modrm = DISReadByte(pCpu, lpszCodeBlock);
2192	reg = MODRM_REG(modrm);
2193
2194	if (pCpu->prefix & PREFIX_OPSIZE)
2195	reg += 8; //2nd table
2196
2197	pOp = (PCOPCODE)&g_aMapX86_Group12[reg];
2198
2199	//little hack to make sure the ModRM byte is included in the returned size
2200	if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM)
2201	size = sizeof(uint8_t); //ModRM byte
2202
2203	size += ParseInstruction(lpszCodeBlock, pOp, pCpu);
2204	return size;
2205	}
2206	//*****************************************************************************
2207	//*****************************************************************************
2208	unsigned ParseGrp13(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
2209	{
2210	unsigned size = 0, modrm, reg;
2211
2212	modrm = DISReadByte(pCpu, lpszCodeBlock);
2213	reg = MODRM_REG(modrm);
2214	if (pCpu->prefix & PREFIX_OPSIZE)
2215	reg += 8; //2nd table
2216
2217	pOp = (PCOPCODE)&g_aMapX86_Group13[reg];
2218
2219	//little hack to make sure the ModRM byte is included in the returned size
2220	if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM)
2221	size = sizeof(uint8_t); //ModRM byte
2222
2223	size += ParseInstruction(lpszCodeBlock, pOp, pCpu);
2224
2225	return size;
2226	}
2227	//*****************************************************************************
2228	//*****************************************************************************
2229	unsigned ParseGrp14(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
2230	{
2231	unsigned size = 0, modrm, reg;
2232
2233	modrm = DISReadByte(pCpu, lpszCodeBlock);
2234	reg = MODRM_REG(modrm);
2235	if (pCpu->prefix & PREFIX_OPSIZE)
2236	reg += 8; //2nd table
2237
2238	pOp = (PCOPCODE)&g_aMapX86_Group14[reg];
2239
2240	//little hack to make sure the ModRM byte is included in the returned size
2241	if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM)
2242	size = sizeof(uint8_t); //ModRM byte
2243
2244	size += ParseInstruction(lpszCodeBlock, pOp, pCpu);
2245
2246	return size;
2247	}
2248	//*****************************************************************************
2249	//*****************************************************************************
2250	unsigned ParseGrp15(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
2251	{
2252	unsigned size = 0, modrm, reg, mod, rm;
2253
2254	modrm = DISReadByte(pCpu, lpszCodeBlock);
2255	mod = MODRM_MOD(modrm);
2256	reg = MODRM_REG(modrm);
2257	rm = MODRM_RM(modrm);
2258
2259	if (mod == 3 && rm == 0)
2260	pOp = (PCOPCODE)&g_aMapX86_Group15_mod11_rm000[reg];
2261	else
2262	pOp = (PCOPCODE)&g_aMapX86_Group15_mem[reg];
2263
2264	//little hack to make sure the ModRM byte is included in the returned size
2265	if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM)
2266	size = sizeof(uint8_t); //ModRM byte
2267
2268	size += ParseInstruction(lpszCodeBlock, pOp, pCpu);
2269	return size;
2270	}
2271	//*****************************************************************************
2272	//*****************************************************************************
2273	unsigned ParseGrp16(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu)
2274	{
2275	unsigned size = 0, modrm, reg;
2276
2277	modrm = DISReadByte(pCpu, lpszCodeBlock);
2278	reg = MODRM_REG(modrm);
2279
2280	pOp = (PCOPCODE)&g_aMapX86_Group16[reg];
2281
2282	//little hack to make sure the ModRM byte is included in the returned size
2283	if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM)
2284	size = sizeof(uint8_t); //ModRM byte
2285
2286	size += ParseInstruction(lpszCodeBlock, pOp, pCpu);
2287	return size;
2288	}
2289	//*****************************************************************************
2290	#if !defined(DIS_CORE_ONLY) && defined(LOG_ENABLED)
2291	static const char *szModRMReg8[] = {"AL", "CL", "DL", "BL", "AH", "CH", "DH", "BH", "R8B", "R9B", "R10B", "R11B", "R12B", "R13B", "R14B", "R15B", "SPL", "BPL", "SIL", "DIL"};
2292	static const char *szModRMReg16[] = {"AX", "CX", "DX", "BX", "SP", "BP", "SI", "DI", "R8W", "R9W", "R10W", "R11W", "R12W", "R13W", "R14W", "R15W"};
2293	static const char *szModRMReg32[] = {"EAX", "ECX", "EDX", "EBX", "ESP", "EBP", "ESI", "EDI", "R8D", "R9D", "R10D", "R11D", "R12D", "R13D", "R14D", "R15D"};
2294	static const char *szModRMReg64[] = {"RAX", "RCX", "RDX", "RBX", "RSP", "RBP", "RSI", "RDI", "R8", "R9", "R10", "R11", "R12", "R13", "R14", "R15"};
2295	static const char *szModRMReg1616[8] = {"BX+SI", "BX+DI", "BP+SI", "BP+DI", "SI", "DI", "BP", "BX"};
2296	#endif
2297	static const char *szModRMSegReg[6] = {"ES", "CS", "SS", "DS", "FS", "GS"};
2298	static const int BaseModRMReg16[8] = { USE_REG_BX, USE_REG_BX, USE_REG_BP, USE_REG_BP, USE_REG_SI, USE_REG_DI, USE_REG_BP, USE_REG_BX};
2299	static const int IndexModRMReg16[4] = { USE_REG_SI, USE_REG_DI, USE_REG_SI, USE_REG_DI};
2300	//*****************************************************************************
2301	void disasmModRMReg(PDISCPUSTATE pCpu, PCOPCODE pOp, unsigned idx, POP_PARAMETER pParam, int fRegAddr)
2302	{
2303	int subtype, type, mod;
2304
2305	mod = pCpu->ModRM.Bits.Mod;
2306
2307	type = OP_PARM_VTYPE(pParam->param);
2308	subtype = OP_PARM_VSUBTYPE(pParam->param);
2309	if (fRegAddr)
2310	subtype = (pCpu->addrmode == CPUMODE_64BIT) ? OP_PARM_q : OP_PARM_d;
2311	else
2312	if (subtype == OP_PARM_v \|\| subtype == OP_PARM_NONE)
2313	{
2314	switch(pCpu->opmode)
2315	{
2316	case CPUMODE_32BIT:
2317	subtype = OP_PARM_d;
2318	break;
2319	case CPUMODE_64BIT:
2320	subtype = OP_PARM_q;
2321	break;
2322	case CPUMODE_16BIT:
2323	subtype = OP_PARM_w;
2324	break;
2325	default:
2326	/* make gcc happy */
2327	break;
2328	}
2329	}
2330
2331	switch (subtype)
2332	{
2333	case OP_PARM_b:
2334	Assert(idx < (pCpu->prefix & PREFIX_REX) ? 16 : 8);
2335
2336	/* AH, BH, CH & DH map to DIL, SIL, EBL & SPL when a rex prefix is present. */
2337	/* Intel® 64 and IA-32 Architectures Software Developers Manual: 3.4.1.1 */
2338	if ( (pCpu->prefix & PREFIX_REX)
2339	&& idx >= USE_REG_AH
2340	&& idx <= USE_REG_BH)
2341	{
2342	idx += (USE_REG_SPL - USE_REG_AH);
2343	}
2344	disasmAddString(pParam->szParam, szModRMReg8[idx]);
2345
2346	pParam->flags \|= USE_REG_GEN8;
2347	pParam->base.reg_gen = idx;
2348	break;
2349
2350	case OP_PARM_w:
2351	disasmAddString(pParam->szParam, szModRMReg16[idx]);
2352	Assert(idx < (pCpu->prefix & PREFIX_REX) ? 16 : 8);
2353
2354	pParam->flags \|= USE_REG_GEN16;
2355	pParam->base.reg_gen = idx;
2356	break;
2357
2358	case OP_PARM_d:
2359	disasmAddString(pParam->szParam, szModRMReg32[idx]);
2360	Assert(idx < (pCpu->prefix & PREFIX_REX) ? 16 : 8);
2361
2362	pParam->flags \|= USE_REG_GEN32;
2363	pParam->base.reg_gen = idx;
2364	break;
2365
2366	case OP_PARM_q:
2367	disasmAddString(pParam->szParam, szModRMReg64[idx]);
2368	pParam->flags \|= USE_REG_GEN64;
2369	pParam->base.reg_gen = idx;
2370	break;
2371
2372	default:
2373	#ifdef IN_RING3
2374	Log(("disasmModRMReg %x:%x failed!!\n", type, subtype));
2375	DIS_THROW(ExceptionInvalidModRM);
2376	#else
2377	AssertMsgFailed(("Oops!\n"));
2378	#endif
2379	break;
2380	}
2381	}
2382	//*****************************************************************************
2383	//*****************************************************************************
2384	void disasmModRMReg16(PDISCPUSTATE pCpu, PCOPCODE pOp, unsigned idx, POP_PARAMETER pParam)
2385	{
2386	disasmAddString(pParam->szParam, szModRMReg1616[idx]);
2387	pParam->flags \|= USE_REG_GEN16;
2388	pParam->base.reg_gen = BaseModRMReg16[idx];
2389	if (idx < 4)
2390	{
2391	pParam->flags \|= USE_INDEX;
2392	pParam->index.reg_gen = IndexModRMReg16[idx];
2393	}
2394	}
2395	//*****************************************************************************
2396	//*****************************************************************************
2397	void disasmModRMSReg(PDISCPUSTATE pCpu, PCOPCODE pOp, unsigned idx, POP_PARAMETER pParam)
2398	{
2399	#if 0 //def DEBUG_Sander
2400	AssertMsg(idx < RT_ELEMENTS(szModRMSegReg), ("idx=%d\n", idx));
2401	#endif
2402	#ifdef IN_RING3
2403	if (idx >= RT_ELEMENTS(szModRMSegReg))
2404	{
2405	Log(("disasmModRMSReg %d failed!!\n", idx));
2406	DIS_THROW(ExceptionInvalidParameter);
2407	}
2408	#endif
2409
2410	idx = RT_MIN(idx, RT_ELEMENTS(szModRMSegReg)-1);
2411	disasmAddString(pParam->szParam, szModRMSegReg[idx]);
2412	pParam->flags \|= USE_REG_SEG;
2413	pParam->base.reg_seg = (DIS_SELREG)idx;
2414	}
2415	//*****************************************************************************
2416	//*****************************************************************************
2417	void disasmPrintAbs32(POP_PARAMETER pParam)
2418	{
2419	disasmAddStringF1(pParam->szParam, "%08Xh", pParam->disp32);
2420	}
2421	//*****************************************************************************
2422	//*****************************************************************************
2423	void disasmPrintDisp32(POP_PARAMETER pParam)
2424	{
2425	disasmAddStringF1(pParam->szParam, "%08Xh", pParam->disp32);
2426	}
2427	//*****************************************************************************
2428	//*****************************************************************************
2429	void disasmPrintDisp64(POP_PARAMETER pParam)
2430	{
2431	disasmAddStringF1(pParam->szParam, "%16RX64h", pParam->disp64);
2432	}
2433	//*****************************************************************************
2434	//*****************************************************************************
2435	void disasmPrintDisp8(POP_PARAMETER pParam)
2436	{
2437	disasmAddStringF1(pParam->szParam, "%d", pParam->disp8);
2438	}
2439	//*****************************************************************************
2440	//*****************************************************************************
2441	void disasmPrintDisp16(POP_PARAMETER pParam)
2442	{
2443	disasmAddStringF1(pParam->szParam, "%04Xh", pParam->disp16);
2444	}
2445	//*****************************************************************************
2446	//*****************************************************************************
2447	void disasmGetPtrString(PDISCPUSTATE pCpu, PCOPCODE pOp, POP_PARAMETER pParam)
2448	{
2449	int subtype = OP_PARM_VSUBTYPE(pParam->param);
2450
2451	if (subtype == OP_PARM_v)
2452	{
2453	switch(pCpu->opmode)
2454	{
2455	case CPUMODE_32BIT:
2456	subtype = OP_PARM_d;
2457	break;
2458	case CPUMODE_64BIT:
2459	subtype = OP_PARM_q;
2460	break;
2461	case CPUMODE_16BIT:
2462	subtype = OP_PARM_w;
2463	break;
2464	default:
2465	/* make gcc happy */
2466	break;
2467	}
2468	}
2469
2470	switch (subtype)
2471	{
2472	case OP_PARM_a: //two words or dwords depending on operand size (bound only)
2473	break;
2474
2475	case OP_PARM_b:
2476	disasmAddString(pParam->szParam, "byte ptr ");
2477	break;
2478
2479	case OP_PARM_w:
2480	disasmAddString(pParam->szParam, "word ptr ");
2481	break;
2482
2483	case OP_PARM_d:
2484	disasmAddString(pParam->szParam, "dword ptr ");
2485	break;
2486
2487	case OP_PARM_q:
2488	case OP_PARM_dq:
2489	disasmAddString(pParam->szParam, "qword ptr ");
2490	break;
2491
2492	case OP_PARM_p:
2493	disasmAddString(pParam->szParam, "far ptr ");
2494	break;
2495
2496	case OP_PARM_s:
2497	break; //??
2498
2499	case OP_PARM_z:
2500	break;
2501	default:
2502	break; //no pointer type specified/necessary
2503	}
2504	if (pCpu->prefix & PREFIX_SEG)
2505	disasmAddStringF1(pParam->szParam, "%s:", szModRMSegReg[pCpu->enmPrefixSeg]);
2506	}
2507	//*****************************************************************************
2508	/* Read functions for getting the opcode bytes */
2509	//*****************************************************************************
2510	uint8_t DISReadByte(PDISCPUSTATE pCpu, RTUINTPTR pAddress)
2511	{
2512	if (pCpu->pfnReadBytes)
2513	{
2514	uint8_t temp = 0;
2515	int rc;
2516
2517	rc = pCpu->pfnReadBytes(pAddress, &temp, sizeof(temp), pCpu);
2518	if (RT_FAILURE(rc))
2519	{
2520	Log(("DISReadByte failed!!\n"));
2521	DIS_THROW(ExceptionMemRead);
2522	}
2523	return temp;
2524	}
2525	#ifdef IN_RING0
2526	AssertMsgFailed(("DISReadByte with no read callback in ring 0!!\n"));
2527	return 0;
2528	#else
2529	return (uint8_t )(uintptr_t)pAddress;
2530	#endif
2531	}
2532	//*****************************************************************************
2533	//*****************************************************************************
2534	uint16_t DISReadWord(PDISCPUSTATE pCpu, RTUINTPTR pAddress)
2535	{
2536	if (pCpu->pfnReadBytes)
2537	{
2538	uint16_t temp = 0;
2539	int rc;
2540
2541	rc = pCpu->pfnReadBytes(pAddress, (uint8_t*)&temp, sizeof(temp), pCpu);
2542	if (RT_FAILURE(rc))
2543	{
2544	Log(("DISReadWord failed!!\n"));
2545	DIS_THROW(ExceptionMemRead);
2546	}
2547	return temp;
2548	}
2549	#ifdef IN_RING0
2550	AssertMsgFailed(("DISReadWord with no read callback in ring 0!!\n"));
2551	return 0;
2552	#else
2553	return (uint16_t )(uintptr_t)pAddress;
2554	#endif
2555	}
2556	//*****************************************************************************
2557	//*****************************************************************************
2558	uint32_t DISReadDWord(PDISCPUSTATE pCpu, RTUINTPTR pAddress)
2559	{
2560	if (pCpu->pfnReadBytes)
2561	{
2562	uint32_t temp = 0;
2563	int rc;
2564
2565	rc = pCpu->pfnReadBytes(pAddress, (uint8_t*)&temp, sizeof(temp), pCpu);
2566	if (RT_FAILURE(rc))
2567	{
2568	Log(("DISReadDWord failed!!\n"));
2569	DIS_THROW(ExceptionMemRead);
2570	}
2571	return temp;
2572	}
2573	#ifdef IN_RING0
2574	AssertMsgFailed(("DISReadDWord with no read callback in ring 0!!\n"));
2575	return 0;
2576	#else
2577	return (uint32_t )(uintptr_t)pAddress;
2578	#endif
2579	}
2580	//*****************************************************************************
2581	//*****************************************************************************
2582	uint64_t DISReadQWord(PDISCPUSTATE pCpu, RTUINTPTR pAddress)
2583	{
2584	if (pCpu->pfnReadBytes)
2585	{
2586	uint64_t temp = 0;
2587	int rc;
2588
2589	rc = pCpu->pfnReadBytes(pAddress, (uint8_t*)&temp, sizeof(temp), pCpu);
2590	if (RT_FAILURE(rc))
2591	{
2592	Log(("DISReadQWord %x failed!!\n", pAddress));
2593	DIS_THROW(ExceptionMemRead);
2594	}
2595
2596	return temp;
2597	}
2598	#ifdef IN_RING0
2599	AssertMsgFailed(("DISReadQWord with no read callback in ring 0!!\n"));
2600	return 0;
2601	#else
2602	return (uint64_t )(uintptr_t)pAddress;
2603	#endif
2604	}
2605
2606	#if !defined(DIS_CORE_ONLY) && defined(LOG_ENABLED)
2607	//*****************************************************************************
2608	//*****************************************************************************
2609	void disasmAddString(char psz, const char pszAdd)
2610	{
2611	strcat(psz, pszAdd);
2612	}
2613	//*****************************************************************************
2614	//*****************************************************************************
2615	void disasmAddStringF(char psz, const char pszFormat, ...)
2616	{
2617	va_list args;
2618	va_start(args, pszFormat);
2619	size_t cchCur = strlen(psz);
2620	Assert(cchCur < RT_SIZEOFMEMB(OP_PARAMETER, szParam));
2621	RTStrPrintfV(psz + cchCur, RT_SIZEOFMEMB(OP_PARAMETER, szParam) - cchCur,
2622	pszFormat, args);
2623	va_end(args);
2624	}
2625
2626	//*****************************************************************************
2627	//*****************************************************************************
2628	void disasmAddChar(char *psz, char ch)
2629	{
2630	char sz[2];
2631
2632	sz[0] = ch;
2633	sz[1] = '\0';
2634	strcat(psz, sz);
2635	}
2636	#endif /* !DIS_CORE_ONLY */
2637
2638
2639	/**
2640	* Validates the lock sequence.
2641	*
2642	* The AMD manual lists the following instructions:
2643	* ADC
2644	* ADD
2645	* AND
2646	* BTC
2647	* BTR
2648	* BTS
2649	* CMPXCHG
2650	* CMPXCHG8B
2651	* CMPXCHG16B
2652	* DEC
2653	* INC
2654	* NEG
2655	* NOT
2656	* OR
2657	* SBB
2658	* SUB
2659	* XADD
2660	* XCHG
2661	* XOR
2662	*
2663	* @param pCpu Fully dissassembled instruction.
2664	*/
2665	void disValidateLockSequence(PDISCPUSTATE pCpu)
2666	{
2667	Assert(pCpu->prefix & PREFIX_LOCK);
2668
2669	/*
2670	* Filter out the valid lock sequences.
2671	*/
2672	switch (pCpu->pCurInstr->opcode)
2673	{
2674	/* simple: no variations */
2675	case OP_CMPXCHG8B: /* == OP_CMPXCHG16B? */
2676	return;
2677
2678	/* simple: /r - reject register destination. */
2679	case OP_BTC:
2680	case OP_BTR:
2681	case OP_BTS:
2682	case OP_CMPXCHG:
2683	case OP_XADD:
2684	if (pCpu->ModRM.Bits.Mod == 3)
2685	break;
2686	return;
2687
2688	/*
2689	* Lots of variants but its sufficient to check that param 1
2690	* is a memory operand.
2691	*/
2692	case OP_ADC:
2693	case OP_ADD:
2694	case OP_AND:
2695	case OP_DEC:
2696	case OP_INC:
2697	case OP_NEG:
2698	case OP_NOT:
2699	case OP_OR:
2700	case OP_SBB:
2701	case OP_SUB:
2702	case OP_XCHG:
2703	case OP_XOR:
2704	if (pCpu->param1.flags & (USE_BASE \| USE_INDEX \| USE_DISPLACEMENT64 \| USE_DISPLACEMENT32 \| USE_DISPLACEMENT16 \| USE_DISPLACEMENT8 \| USE_RIPDISPLACEMENT32))
2705	return;
2706	break;
2707
2708	default:
2709	break;
2710	}
2711
2712	/*
2713	* Invalid lock sequence, make it a OP_ILLUD2.
2714	*/
2715	pCpu->pCurInstr = &g_aTwoByteMapX86[11];
2716	Assert(pCpu->pCurInstr->opcode == OP_ILLUD2);
2717	}
2718

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source: vbox/trunk/src/VBox/Disassembler/DisasmCore.cpp@ 28867

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