/** @file * * VBox disassembler: * Core components */ /* * Copyright (C) 2006-2007 Sun Microsystems, Inc. * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa * Clara, CA 95054 USA or visit http://www.sun.com if you need * additional information or have any questions. */ /******************************************************************************* * Header Files * *******************************************************************************/ #define LOG_GROUP LOG_GROUP_DIS #ifdef USING_VISUAL_STUDIO # include #endif #include #include #include #include #include #include #include #include #include "DisasmInternal.h" #include "DisasmTables.h" #if !defined(DIS_CORE_ONLY) && defined(LOG_ENABLED) # include # include #endif /******************************************************************************* * Internal Functions * *******************************************************************************/ static int disCoreOne(PDISCPUSTATE pCpu, RTUINTPTR InstructionAddr, unsigned *pcbInstruction); #if !defined(DIS_CORE_ONLY) && defined(LOG_ENABLED) static void disasmAddString(char *psz, const char *pszString); static void disasmAddStringF(char *psz, uint32_t cbString, const char *pszFormat, ...); static void disasmAddChar(char *psz, char ch); #else # define disasmAddString(psz, pszString) do {} while (0) # ifdef _MSC_VER # define disasmAddStringF __noop # else # define disasmAddStringF(psz, cbString, pszFormat...) do {} while (0) /* Arg wanna get rid of that warning */ # endif # define disasmAddChar(psz, ch) do {} while (0) #endif static unsigned QueryModRM(RTUINTPTR pu8CodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu, unsigned *pSibInc = NULL); static unsigned QueryModRM_SizeOnly(RTUINTPTR pu8CodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu, unsigned *pSibInc = NULL); static void UseSIB(RTUINTPTR pu8CodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu); static unsigned ParseSIB_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu); /******************************************************************************* * Global Variables * *******************************************************************************/ PFNDISPARSE pfnFullDisasm[IDX_ParseMax] = { ParseIllegal, ParseModRM, UseModRM, ParseImmByte, ParseImmBRel, ParseImmUshort, ParseImmV, ParseImmVRel, ParseImmAddr, ParseFixedReg, ParseImmUlong, ParseImmQword, ParseTwoByteEsc, ParseImmGrpl, ParseShiftGrp2, ParseGrp3, ParseGrp4, ParseGrp5, Parse3DNow, ParseGrp6, ParseGrp7, ParseGrp8, ParseGrp9, ParseGrp10, ParseGrp12, ParseGrp13, ParseGrp14, ParseGrp15, ParseGrp16, ParseModFence, ParseYv, ParseYb, ParseXv, ParseXb, ParseEscFP, ParseNopPause, ParseImmByteSX, ParseImmZ }; PFNDISPARSE pfnCalcSize[IDX_ParseMax] = { ParseIllegal, ParseModRM_SizeOnly, UseModRM, ParseImmByte_SizeOnly, ParseImmBRel_SizeOnly, ParseImmUshort_SizeOnly, ParseImmV_SizeOnly, ParseImmVRel_SizeOnly, ParseImmAddr_SizeOnly, ParseFixedReg, ParseImmUlong_SizeOnly, ParseImmQword_SizeOnly, ParseTwoByteEsc, ParseImmGrpl, ParseShiftGrp2, ParseGrp3, ParseGrp4, ParseGrp5, Parse3DNow, ParseGrp6, ParseGrp7, ParseGrp8, ParseGrp9, ParseGrp10, ParseGrp12, ParseGrp13, ParseGrp14, ParseGrp15, ParseGrp16, ParseModFence, ParseYv, ParseYb, ParseXv, ParseXb, ParseEscFP, ParseNopPause, ParseImmByteSX_SizeOnly, ParseImmZ_SizeOnly }; /** * Parses one instruction. * The result is found in pCpu. * * @returns Success indicator. * @param pCpu Pointer to cpu structure which has DISCPUSTATE::mode set correctly. * @param InstructionAddr Pointer to the instruction to parse. * @param pcbInstruction Where to store the size of the instruction. * NULL is allowed. */ DISDECL(int) DISCoreOne(PDISCPUSTATE pCpu, RTUINTPTR InstructionAddr, unsigned *pcbInstruction) { /* * Reset instruction settings */ pCpu->prefix = PREFIX_NONE; pCpu->enmPrefixSeg = DIS_SELREG_DS; pCpu->lastprefix = 0; pCpu->ModRM.u = 0; pCpu->SIB.u = 0; pCpu->param1.parval = 0; pCpu->param2.parval = 0; pCpu->param3.parval = 0; pCpu->param1.szParam[0] = '\0'; pCpu->param2.szParam[0] = '\0'; pCpu->param3.szParam[0] = '\0'; pCpu->param1.flags = 0; pCpu->param2.flags = 0; pCpu->param3.flags = 0; pCpu->param1.size = 0; pCpu->param2.size = 0; pCpu->param3.size = 0; pCpu->pfnReadBytes = 0; pCpu->uFilter = OPTYPE_ALL; pCpu->pfnDisasmFnTable = pfnFullDisasm; return VBOX_SUCCESS(disCoreOne(pCpu, InstructionAddr, pcbInstruction)); } /** * Parses one guest instruction. * The result is found in pCpu and pcbInstruction. * * @returns VBox status code. * @param InstructionAddr Address of the instruction to decode. What this means * is left to the pfnReadBytes function. * @param enmCpuMode The CPU mode. CPUMODE_32BIT, CPUMODE_16BIT, or CPUMODE_64BIT. * @param pfnReadBytes Callback for reading instruction bytes. * @param pvUser User argument for the instruction reader. (Ends up in apvUserData[0].) * @param pCpu Pointer to cpu structure. Will be initialized. * @param pcbInstruction Where to store the size of the instruction. * NULL is allowed. */ DISDECL(int) DISCoreOneEx(RTUINTPTR InstructionAddr, DISCPUMODE enmCpuMode, PFN_DIS_READBYTES pfnReadBytes, void *pvUser, PDISCPUSTATE pCpu, unsigned *pcbInstruction) { /* * Reset instruction settings */ pCpu->prefix = PREFIX_NONE; pCpu->enmPrefixSeg = DIS_SELREG_DS; pCpu->lastprefix = 0; pCpu->mode = enmCpuMode; pCpu->ModRM.u = 0; pCpu->SIB.u = 0; pCpu->param1.parval = 0; pCpu->param2.parval = 0; pCpu->param3.parval = 0; pCpu->param1.szParam[0] = '\0'; pCpu->param2.szParam[0] = '\0'; pCpu->param3.szParam[0] = '\0'; pCpu->param1.flags = 0; pCpu->param2.flags = 0; pCpu->param3.flags = 0; pCpu->param1.size = 0; pCpu->param2.size = 0; pCpu->param3.size = 0; pCpu->pfnReadBytes = pfnReadBytes; pCpu->apvUserData[0] = pvUser; pCpu->uFilter = OPTYPE_ALL; pCpu->pfnDisasmFnTable = pfnFullDisasm; return disCoreOne(pCpu, InstructionAddr, pcbInstruction); } /** * Internal worker for DISCoreOne and DISCoreOneEx. * * @returns VBox status code. * @param pCpu Initialized cpu state. * @param InstructionAddr Instruction address. * @param pcbInstruction Where to store the instruction size. Can be NULL. */ static int disCoreOne(PDISCPUSTATE pCpu, RTUINTPTR InstructionAddr, unsigned *pcbInstruction) { const OPCODE *paOneByteMap; /* * Parse byte by byte. */ unsigned iByte = 0; unsigned cbInc; if (pCpu->mode == CPUMODE_64BIT) { paOneByteMap = g_aOneByteMapX64; pCpu->addrmode = CPUMODE_64BIT; pCpu->opmode = CPUMODE_32BIT; } else { paOneByteMap = g_aOneByteMapX86; pCpu->addrmode = pCpu->mode; pCpu->opmode = pCpu->mode; } #ifdef IN_RING3 # ifndef __L4ENV__ /* Unfortunately, we have no exception handling in l4env */ try # else pCpu->pJumpBuffer = &jumpbuffer; if (setjmp(jumpbuffer) == 0) # endif #endif { while(1) { uint8_t codebyte = DISReadByte(pCpu, InstructionAddr+iByte); uint8_t opcode = paOneByteMap[codebyte].opcode; /* Hardcoded assumption about OP_* values!! */ if (opcode <= OP_LAST_PREFIX) { /* The REX prefix must precede the opcode byte(s). Any other placement is ignored. */ if (opcode != OP_REX) { /** Last prefix byte (for SSE2 extension tables); don't include the REX prefix */ pCpu->lastprefix = opcode; pCpu->prefix &= ~PREFIX_REX; } switch (opcode) { case OP_INVALID: AssertMsgFailed(("Invalid opcode!!\n")); return VERR_GENERAL_FAILURE; /** @todo better error code. */ // segment override prefix byte case OP_SEG: pCpu->enmPrefixSeg = (DIS_SELREG)(paOneByteMap[codebyte].param1 - OP_PARM_REG_SEG_START); /* Segment prefixes for CS, DS, ES and SS are ignored in long mode. */ if ( pCpu->mode != CPUMODE_64BIT || pCpu->enmPrefixSeg >= DIS_SELREG_FS) { pCpu->prefix |= PREFIX_SEG; } iByte += sizeof(uint8_t); continue; //fetch the next byte // lock prefix byte case OP_LOCK: pCpu->prefix |= PREFIX_LOCK; iByte += sizeof(uint8_t); continue; //fetch the next byte // address size override prefix byte case OP_ADDRSIZE: pCpu->prefix |= PREFIX_ADDRSIZE; if (pCpu->mode == CPUMODE_16BIT) pCpu->addrmode = CPUMODE_32BIT; else if (pCpu->mode == CPUMODE_32BIT) pCpu->addrmode = CPUMODE_16BIT; else pCpu->addrmode = CPUMODE_32BIT; /* 64 bits */ iByte += sizeof(uint8_t); continue; //fetch the next byte // operand size override prefix byte case OP_OPSIZE: pCpu->prefix |= PREFIX_OPSIZE; if (pCpu->mode == CPUMODE_16BIT) pCpu->opmode = CPUMODE_32BIT; else pCpu->opmode = CPUMODE_16BIT; /* for 32 and 64 bits mode (there is no 32 bits operand size override prefix) */ iByte += sizeof(uint8_t); continue; //fetch the next byte // rep and repne are not really prefixes, but we'll treat them as such case OP_REPE: pCpu->prefix |= PREFIX_REP; iByte += sizeof(uint8_t); continue; //fetch the next byte case OP_REPNE: pCpu->prefix |= PREFIX_REPNE; iByte += sizeof(uint8_t); continue; //fetch the next byte case OP_REX: Assert(pCpu->mode == CPUMODE_64BIT); /* REX prefix byte */ pCpu->prefix |= PREFIX_REX; pCpu->prefix_rex = PREFIX_REX_OP_2_FLAGS(paOneByteMap[codebyte].param1); iByte += sizeof(uint8_t); if (pCpu->prefix_rex & PREFIX_REX_FLAGS_W) pCpu->opmode = CPUMODE_64BIT; /* overrides size prefix byte */ continue; //fetch the next byte } } unsigned uIdx = iByte; iByte += sizeof(uint8_t); //first opcode byte pCpu->opaddr = InstructionAddr + uIdx; pCpu->opcode = codebyte; cbInc = ParseInstruction(InstructionAddr + iByte, &paOneByteMap[pCpu->opcode], pCpu); iByte += cbInc; break; } } #ifdef IN_RING3 # ifndef __L4ENV__ catch(...) # else else /* setjmp has returned a non-zero value: an exception occured */ # endif { pCpu->opsize = 0; return VERR_DIS_GEN_FAILURE; } #endif pCpu->opsize = iByte; if (pcbInstruction) *pcbInstruction = iByte; if (pCpu->prefix & PREFIX_LOCK) disValidateLockSequence(pCpu); return VINF_SUCCESS; } //***************************************************************************** //***************************************************************************** unsigned ParseInstruction(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, PDISCPUSTATE pCpu) { int size = 0; bool fFiltered = false; // Store the opcode format string for disasmPrintf #ifndef DIS_CORE_ONLY pCpu->pszOpcode = pOp->pszOpcode; #endif pCpu->pCurInstr = pOp; /* * Apply filter to instruction type to determine if a full disassembly is required. * @note Multibyte opcodes are always marked harmless until the final byte. */ if ((pOp->optype & pCpu->uFilter) == 0) { fFiltered = true; pCpu->pfnDisasmFnTable = pfnCalcSize; } else { /* Not filtered out -> full disassembly */ pCpu->pfnDisasmFnTable = pfnFullDisasm; } // Should contain the parameter type on input pCpu->param1.param = pOp->param1; pCpu->param2.param = pOp->param2; pCpu->param3.param = pOp->param3; /* Correct the operand size if the instruction is marked as forced or default 64 bits */ if (pCpu->mode == CPUMODE_64BIT) { if (pOp->optype & OPTYPE_FORCED_64_OP_SIZE) pCpu->opsize = CPUMODE_64BIT; else if ( (pOp->optype & OPTYPE_DEFAULT_64_OP_SIZE) && !(pCpu->prefix & PREFIX_OPSIZE)) pCpu->opsize = CPUMODE_64BIT; } if (pOp->idxParse1 != IDX_ParseNop) { size += pCpu->pfnDisasmFnTable[pOp->idxParse1](lpszCodeBlock, pOp, &pCpu->param1, pCpu); if (fFiltered == false) pCpu->param1.size = DISGetParamSize(pCpu, &pCpu->param1); } if (pOp->idxParse2 != IDX_ParseNop) { size += pCpu->pfnDisasmFnTable[pOp->idxParse2](lpszCodeBlock+size, pOp, &pCpu->param2, pCpu); if (fFiltered == false) pCpu->param2.size = DISGetParamSize(pCpu, &pCpu->param2); } if (pOp->idxParse3 != IDX_ParseNop) { size += pCpu->pfnDisasmFnTable[pOp->idxParse3](lpszCodeBlock+size, pOp, &pCpu->param3, pCpu); if (fFiltered == false) pCpu->param3.size = DISGetParamSize(pCpu, &pCpu->param3); } // else simple one byte instruction return size; } //***************************************************************************** /* Floating point opcode parsing */ //***************************************************************************** unsigned ParseEscFP(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { int index; const OPCODE *fpop; unsigned size = 0, ModRM; ModRM = DISReadByte(pCpu, lpszCodeBlock); index = pCpu->opcode - 0xD8; if (ModRM <= 0xBF) { fpop = &(g_paMapX86_FP_Low[index])[MODRM_REG(ModRM)]; pCpu->pCurInstr = (PCOPCODE)fpop; // Should contain the parameter type on input pCpu->param1.param = fpop->param1; pCpu->param2.param = fpop->param2; } else { fpop = &(g_paMapX86_FP_High[index])[ModRM - 0xC0]; pCpu->pCurInstr = (PCOPCODE)fpop; } /* * Apply filter to instruction type to determine if a full disassembly is required. * @note Multibyte opcodes are always marked harmless until the final byte. */ if ((fpop->optype & pCpu->uFilter) == 0) { pCpu->pfnDisasmFnTable = pfnCalcSize; } else { /* Not filtered out -> full disassembly */ pCpu->pfnDisasmFnTable = pfnFullDisasm; } /* Correct the operand size if the instruction is marked as forced or default 64 bits */ if (pCpu->mode == CPUMODE_64BIT) { /* Note: redundant, but just in case this ever changes */ if (fpop->optype & OPTYPE_FORCED_64_OP_SIZE) pCpu->opsize = CPUMODE_64BIT; else if ( (fpop->optype & OPTYPE_DEFAULT_64_OP_SIZE) && !(pCpu->prefix & PREFIX_OPSIZE)) pCpu->opsize = CPUMODE_64BIT; } // Little hack to make sure the ModRM byte is included in the returned size if (fpop->idxParse1 != IDX_ParseModRM && fpop->idxParse2 != IDX_ParseModRM) size = sizeof(uint8_t); //ModRM byte if (fpop->idxParse1 != IDX_ParseNop) size += pCpu->pfnDisasmFnTable[fpop->idxParse1](lpszCodeBlock+size, (PCOPCODE)fpop, pParam, pCpu); if (fpop->idxParse2 != IDX_ParseNop) size += pCpu->pfnDisasmFnTable[fpop->idxParse2](lpszCodeBlock+size, (PCOPCODE)fpop, pParam, pCpu); // Store the opcode format string for disasmPrintf #ifndef DIS_CORE_ONLY pCpu->pszOpcode = fpop->pszOpcode; #endif return size; } //***************************************************************************** // SIB byte: (32 bits mode only) // 7 - 6 5 - 3 2-0 // Scale Index Base //***************************************************************************** static const char *szSIBBaseReg[8] = {"EAX", "ECX", "EDX", "EBX", "ESP", "EBP", "ESI", "EDI"}; static const char *szSIBIndexReg[8] = {"EAX", "ECX", "EDX", "EBX", NULL, "EBP", "ESI", "EDI"}; static const char *szSIBBaseReg64[16] = {"RAX", "RCX", "RDX", "RBX", "RSP", "RBP", "RSI", "RDI", "R8", "R9", "R10", "R11", "R12", "R13", "R14", "R15"}; static const char *szSIBIndexReg64[16]= {"RAX", "RCX", "RDX", "RBX", NULL, "RBP", "RSI", "RDI", "R8", "R9", "R10", "R11", "R12", "R13", "R14", "R15"}; static const char *szSIBScale[4] = {"", "*2", "*4", "*8"}; //***************************************************************************** void UseSIB(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned scale, base, index, regtype; const char **ppszSIBIndexReg; const char **ppszSIBBaseReg; char szTemp[32]; szTemp[0] = '\0'; scale = pCpu->SIB.Bits.Scale; base = pCpu->SIB.Bits.Base; index = pCpu->SIB.Bits.Index; if (pCpu->addrmode == CPUMODE_32BIT) { ppszSIBIndexReg = szSIBIndexReg; ppszSIBBaseReg = szSIBBaseReg; regtype = USE_REG_GEN32; } else { ppszSIBIndexReg = szSIBIndexReg64; ppszSIBBaseReg = szSIBBaseReg64; regtype = USE_REG_GEN64; } if (ppszSIBIndexReg[index]) { pParam->flags |= USE_INDEX; pParam->index.reg_gen = index; if (scale != 0) { pParam->flags |= USE_SCALE; pParam->scale = (1<ModRM.Bits.Mod == 0) disasmAddStringF(szTemp, sizeof(szTemp), "%s%s", ppszSIBIndexReg[index], szSIBScale[scale]); else disasmAddStringF(szTemp, sizeof(szTemp), "%s+%s%s", ppszSIBBaseReg[base], ppszSIBIndexReg[index], szSIBScale[scale]); } else { if (base != 5 || pCpu->ModRM.Bits.Mod != 0) disasmAddStringF(szTemp, sizeof(szTemp), "%s", ppszSIBBaseReg[base]); } if (base == 5 && pCpu->ModRM.Bits.Mod == 0) { // [scaled index] + disp32 disasmAddString(pParam->szParam, &szTemp[0]); pParam->flags |= USE_DISPLACEMENT32; pParam->disp32 = pCpu->disp; disasmAddChar(pParam->szParam, '+'); disasmPrintDisp32(pParam); } else { disasmAddString(pParam->szParam, szTemp); pParam->flags |= USE_BASE | regtype; pParam->base.reg_gen = base; } return; /* Already fetched everything in ParseSIB; no size returned */ } //***************************************************************************** //***************************************************************************** unsigned ParseSIB(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = sizeof(uint8_t); unsigned SIB; SIB = DISReadByte(pCpu, lpszCodeBlock); lpszCodeBlock += size; pCpu->SIB.Bits.Base = SIB_BASE(SIB); pCpu->SIB.Bits.Index = SIB_INDEX(SIB); pCpu->SIB.Bits.Scale = SIB_SCALE(SIB); if (pCpu->prefix & PREFIX_REX) { /* REX.B extends the Base field if not scaled index + disp32 */ if (!(pCpu->SIB.Bits.Base == 5 && pCpu->ModRM.Bits.Mod == 0)) pCpu->SIB.Bits.Base |= ((!!(pCpu->prefix_rex & PREFIX_REX_FLAGS_B)) << 3); pCpu->SIB.Bits.Index |= ((!!(pCpu->prefix_rex & PREFIX_REX_FLAGS_X)) << 3); } if ( pCpu->SIB.Bits.Base == 5 && pCpu->ModRM.Bits.Mod == 0) { /* Additional 32 bits displacement. No change in long mode. */ pCpu->disp = DISReadDWord(pCpu, lpszCodeBlock); size += sizeof(int32_t); } return size; } //***************************************************************************** //***************************************************************************** unsigned ParseSIB_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = sizeof(uint8_t); unsigned SIB; SIB = DISReadByte(pCpu, lpszCodeBlock); lpszCodeBlock += size; pCpu->SIB.Bits.Base = SIB_BASE(SIB); pCpu->SIB.Bits.Index = SIB_INDEX(SIB); pCpu->SIB.Bits.Scale = SIB_SCALE(SIB); if (pCpu->prefix & PREFIX_REX) { /* REX.B extends the Base field. */ pCpu->SIB.Bits.Base |= ((!!(pCpu->prefix_rex & PREFIX_REX_FLAGS_B)) << 3); /* REX.X extends the Index field. */ pCpu->SIB.Bits.Index |= ((!!(pCpu->prefix_rex & PREFIX_REX_FLAGS_X)) << 3); } if ( pCpu->SIB.Bits.Base == 5 && pCpu->ModRM.Bits.Mod == 0) { /* Additional 32 bits displacement. No change in long mode. */ size += sizeof(int32_t); } return size; } //***************************************************************************** // ModR/M byte: // 7 - 6 5 - 3 2-0 // Mod Reg/Opcode R/M //***************************************************************************** unsigned UseModRM(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { int vtype = OP_PARM_VTYPE(pParam->param); unsigned reg = pCpu->ModRM.Bits.Reg; unsigned mod = pCpu->ModRM.Bits.Mod; unsigned rm = pCpu->ModRM.Bits.Rm; switch (vtype) { case OP_PARM_G: //general purpose register disasmModRMReg(pCpu, pOp, reg, pParam, 0); return 0; default: if (IS_OP_PARM_RARE(vtype)) { switch (vtype) { case OP_PARM_C: //control register disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "CR%d", reg); pParam->flags |= USE_REG_CR; pParam->base.reg_ctrl = reg; return 0; case OP_PARM_D: //debug register disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "DR%d", reg); pParam->flags |= USE_REG_DBG; pParam->base.reg_dbg = reg; return 0; case OP_PARM_P: //MMX register reg &= 7; /* REX.R has no effect here */ disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "MM%d", reg); pParam->flags |= USE_REG_MMX; pParam->base.reg_mmx = reg; return 0; case OP_PARM_S: //segment register reg &= 7; /* REX.R has no effect here */ disasmModRMSReg(pCpu, pOp, reg, pParam); pParam->flags |= USE_REG_SEG; return 0; case OP_PARM_T: //test register reg &= 7; /* REX.R has no effect here */ disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "TR%d", reg); pParam->flags |= USE_REG_TEST; pParam->base.reg_test = reg; return 0; case OP_PARM_W: //XMM register or memory operand if (mod != 3) break; /* memory operand */ reg = rm; /* the RM field specifies the xmm register */ /* else no break */ case OP_PARM_V: //XMM register disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "XMM%d", reg); pParam->flags |= USE_REG_XMM; pParam->base.reg_xmm = reg; return 0; } } } /* @todo bound */ if (pCpu->addrmode != CPUMODE_16BIT) { Assert(pCpu->addrmode == CPUMODE_32BIT || pCpu->addrmode == CPUMODE_64BIT); /* * Note: displacements in long mode are 8 or 32 bits and sign-extended to 64 bits */ switch (mod) { case 0: //effective address disasmGetPtrString(pCpu, pOp, pParam); disasmAddChar(pParam->szParam, '['); if (rm == 4) { /* SIB byte follows ModRM */ UseSIB(lpszCodeBlock, pOp, pParam, pCpu); } else if (rm == 5) { /* 32 bits displacement */ if (pCpu->mode == CPUMODE_32BIT) { pParam->flags |= USE_DISPLACEMENT32; pParam->disp32 = pCpu->disp; disasmPrintDisp32(pParam); } else { pParam->flags |= USE_RIPDISPLACEMENT32; pParam->disp32 = pCpu->disp; disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "RIP+"); disasmPrintDisp32(pParam); } } else {//register address pParam->flags |= USE_BASE; disasmModRMReg(pCpu, pOp, rm, pParam, 1); } disasmAddChar(pParam->szParam, ']'); break; case 1: //effective address + 8 bits displacement disasmGetPtrString(pCpu, pOp, pParam); disasmAddChar(pParam->szParam, '['); if (rm == 4) {//SIB byte follows ModRM UseSIB(lpszCodeBlock, pOp, pParam, pCpu); } else { pParam->flags |= USE_BASE; disasmModRMReg(pCpu, pOp, rm, pParam, 1); } pParam->disp8 = pCpu->disp; pParam->flags |= USE_DISPLACEMENT8; if (pParam->disp8 != 0) { if (pParam->disp8 > 0) disasmAddChar(pParam->szParam, '+'); disasmPrintDisp8(pParam); } disasmAddChar(pParam->szParam, ']'); break; case 2: //effective address + 32 bits displacement disasmGetPtrString(pCpu, pOp, pParam); disasmAddChar(pParam->szParam, '['); if (rm == 4) {//SIB byte follows ModRM UseSIB(lpszCodeBlock, pOp, pParam, pCpu); } else { pParam->flags |= USE_BASE; disasmModRMReg(pCpu, pOp, rm, pParam, 1); } pParam->disp32 = pCpu->disp; pParam->flags |= USE_DISPLACEMENT32; if (pParam->disp32 != 0) { disasmAddChar(pParam->szParam, '+'); disasmPrintDisp32(pParam); } disasmAddChar(pParam->szParam, ']'); break; case 3: //registers disasmModRMReg(pCpu, pOp, rm, pParam, 0); break; } } else {//16 bits addressing mode switch (mod) { case 0: //effective address disasmGetPtrString(pCpu, pOp, pParam); disasmAddChar(pParam->szParam, '['); if (rm == 6) {//16 bits displacement pParam->disp16 = pCpu->disp; pParam->flags |= USE_DISPLACEMENT16; disasmPrintDisp16(pParam); } else { pParam->flags |= USE_BASE; disasmModRMReg16(pCpu, pOp, rm, pParam); } disasmAddChar(pParam->szParam, ']'); break; case 1: //effective address + 8 bits displacement disasmGetPtrString(pCpu, pOp, pParam); disasmAddChar(pParam->szParam, '['); disasmModRMReg16(pCpu, pOp, rm, pParam); pParam->disp8 = pCpu->disp; pParam->flags |= USE_BASE | USE_DISPLACEMENT8; if (pParam->disp8 != 0) { if (pParam->disp8 > 0) disasmAddChar(pParam->szParam, '+'); disasmPrintDisp8(pParam); } disasmAddChar(pParam->szParam, ']'); break; case 2: //effective address + 16 bits displacement disasmGetPtrString(pCpu, pOp, pParam); disasmAddChar(pParam->szParam, '['); disasmModRMReg16(pCpu, pOp, rm, pParam); pParam->disp16 = pCpu->disp; pParam->flags |= USE_BASE | USE_DISPLACEMENT16; if (pParam->disp16 != 0) { disasmAddChar(pParam->szParam, '+'); disasmPrintDisp16(pParam); } disasmAddChar(pParam->szParam, ']'); break; case 3: //registers disasmModRMReg(pCpu, pOp, rm, pParam, 0); break; } } return 0; //everything was already fetched in ParseModRM } //***************************************************************************** // Query the size of the ModRM parameters and fetch the immediate data (if any) //***************************************************************************** unsigned QueryModRM(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu, unsigned *pSibInc) { unsigned sibinc; unsigned size = 0; // unsigned reg = pCpu->ModRM.Bits.Reg; unsigned mod = pCpu->ModRM.Bits.Mod; unsigned rm = pCpu->ModRM.Bits.Rm; if (!pSibInc) pSibInc = &sibinc; *pSibInc = 0; if (pCpu->addrmode != CPUMODE_16BIT) { Assert(pCpu->addrmode == CPUMODE_32BIT || pCpu->addrmode == CPUMODE_64BIT); /* * Note: displacements in long mode are 8 or 32 bits and sign-extended to 64 bits */ if (mod != 3 && rm == 4) { /* SIB byte follows ModRM */ *pSibInc = ParseSIB(lpszCodeBlock, pOp, pParam, pCpu); lpszCodeBlock += *pSibInc; size += *pSibInc; } switch (mod) { case 0: /* Effective address */ if (rm == 5) { /* 32 bits displacement */ pCpu->disp = DISReadDWord(pCpu, lpszCodeBlock); size += sizeof(int32_t); } /* else register address */ break; case 1: /* Effective address + 8 bits displacement */ pCpu->disp = (int8_t)DISReadByte(pCpu, lpszCodeBlock); size += sizeof(char); break; case 2: /* Effective address + 32 bits displacement */ pCpu->disp = DISReadDWord(pCpu, lpszCodeBlock); size += sizeof(int32_t); break; case 3: /* registers */ break; } } else { /* 16 bits mode */ switch (mod) { case 0: /* Effective address */ if (rm == 6) { pCpu->disp = DISReadWord(pCpu, lpszCodeBlock); size += sizeof(uint16_t); } /* else register address */ break; case 1: /* Effective address + 8 bits displacement */ pCpu->disp = (int8_t)DISReadByte(pCpu, lpszCodeBlock); size += sizeof(char); break; case 2: /* Effective address + 32 bits displacement */ pCpu->disp = (int16_t)DISReadWord(pCpu, lpszCodeBlock); size += sizeof(uint16_t); break; case 3: /* registers */ break; } } return size; } //***************************************************************************** // Query the size of the ModRM parameters and fetch the immediate data (if any) //***************************************************************************** unsigned QueryModRM_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu, unsigned *pSibInc) { unsigned sibinc; unsigned size = 0; // unsigned reg = pCpu->ModRM.Bits.Reg; unsigned mod = pCpu->ModRM.Bits.Mod; unsigned rm = pCpu->ModRM.Bits.Rm; if (!pSibInc) pSibInc = &sibinc; *pSibInc = 0; if (pCpu->addrmode != CPUMODE_16BIT) { Assert(pCpu->addrmode == CPUMODE_32BIT || pCpu->addrmode == CPUMODE_64BIT); /* * Note: displacements in long mode are 8 or 32 bits and sign-extended to 64 bits */ if (mod != 3 && rm == 4) { /* SIB byte follows ModRM */ *pSibInc = ParseSIB_SizeOnly(lpszCodeBlock, pOp, pParam, pCpu); lpszCodeBlock += *pSibInc; size += *pSibInc; } switch (mod) { case 0: //effective address if (rm == 5) { /* 32 bits displacement */ size += sizeof(int32_t); } /* else register address */ break; case 1: /* Effective address + 8 bits displacement */ size += sizeof(char); break; case 2: /* Effective address + 32 bits displacement */ size += sizeof(int32_t); break; case 3: /* registers */ break; } } else { /* 16 bits mode */ switch (mod) { case 0: //effective address if (rm == 6) { size += sizeof(uint16_t); } /* else register address */ break; case 1: /* Effective address + 8 bits displacement */ size += sizeof(char); break; case 2: /* Effective address + 32 bits displacement */ size += sizeof(uint16_t); break; case 3: /* registers */ break; } } return size; } //***************************************************************************** //***************************************************************************** unsigned ParseIllegal(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { AssertFailed(); return 0; } //***************************************************************************** //***************************************************************************** unsigned ParseModRM(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = sizeof(uint8_t); //ModRM byte unsigned sibinc, ModRM; ModRM = DISReadByte(pCpu, lpszCodeBlock); lpszCodeBlock += sizeof(uint8_t); pCpu->ModRM.Bits.Rm = MODRM_RM(ModRM); pCpu->ModRM.Bits.Mod = MODRM_MOD(ModRM); pCpu->ModRM.Bits.Reg = MODRM_REG(ModRM); if (pCpu->prefix & PREFIX_REX) { Assert(pCpu->mode == CPUMODE_64BIT); /* REX.R extends the Reg field. */ pCpu->ModRM.Bits.Reg |= ((!!(pCpu->prefix_rex & PREFIX_REX_FLAGS_R)) << 3); /* REX.B extends the Rm field if there is no SIB byte nor a 32 bits displacement */ if (!( pCpu->ModRM.Bits.Mod != 3 && pCpu->ModRM.Bits.Rm == 4) && !( pCpu->ModRM.Bits.Mod == 0 && pCpu->ModRM.Bits.Rm == 5)) { pCpu->ModRM.Bits.Rm |= ((!!(pCpu->prefix_rex & PREFIX_REX_FLAGS_B)) << 3); } } size += QueryModRM(lpszCodeBlock, pOp, pParam, pCpu, &sibinc); lpszCodeBlock += sibinc; UseModRM(lpszCodeBlock, pOp, pParam, pCpu); return size; } //***************************************************************************** //***************************************************************************** unsigned ParseModRM_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = sizeof(uint8_t); //ModRM byte unsigned sibinc, ModRM; ModRM = DISReadByte(pCpu, lpszCodeBlock); lpszCodeBlock += sizeof(uint8_t); pCpu->ModRM.Bits.Rm = MODRM_RM(ModRM); pCpu->ModRM.Bits.Mod = MODRM_MOD(ModRM); pCpu->ModRM.Bits.Reg = MODRM_REG(ModRM); if (pCpu->prefix & PREFIX_REX) { Assert(pCpu->mode == CPUMODE_64BIT); /* REX.R extends the Reg field. */ pCpu->ModRM.Bits.Reg |= ((!!(pCpu->prefix_rex & PREFIX_REX_FLAGS_R)) << 3); /* REX.B extends the Rm field if there is no SIB byte nor a 32 bits displacement */ if (!( pCpu->ModRM.Bits.Mod != 3 && pCpu->ModRM.Bits.Rm == 4) && !( pCpu->ModRM.Bits.Mod == 0 && pCpu->ModRM.Bits.Rm == 5)) { pCpu->ModRM.Bits.Rm |= ((!!(pCpu->prefix_rex & PREFIX_REX_FLAGS_B)) << 3); } } size += QueryModRM_SizeOnly(lpszCodeBlock, pOp, pParam, pCpu, &sibinc); lpszCodeBlock += sibinc; /* UseModRM is not necessary here; we're only interested in the opcode size */ return size; } //***************************************************************************** //***************************************************************************** unsigned ParseModFence(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { ////AssertMsgFailed(("??\n")); //nothing to do apparently return 0; } //***************************************************************************** //***************************************************************************** unsigned ParseImmByte(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { pParam->parval = DISReadByte(pCpu, lpszCodeBlock); pParam->flags |= USE_IMMEDIATE8; pParam->size = sizeof(uint8_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "0%02Xh", (uint32_t)pParam->parval); return sizeof(uint8_t); } //***************************************************************************** //***************************************************************************** unsigned ParseImmByte_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { return sizeof(uint8_t); } //***************************************************************************** //***************************************************************************** unsigned ParseImmByteSX(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { if (pCpu->opmode == CPUMODE_32BIT) /** @todo In AMD64 mode we're ending up with 16-bit parvals now, see the disassembler _output_ for tstAsmSignExtend-1.asm. */ { pParam->parval = (uint32_t)(int8_t)DISReadByte(pCpu, lpszCodeBlock); pParam->flags |= USE_IMMEDIATE32_SX8; pParam->size = sizeof(uint32_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "0%08Xh", (uint32_t)pParam->parval); } else { pParam->parval = (uint16_t)(int8_t)DISReadByte(pCpu, lpszCodeBlock); pParam->flags |= USE_IMMEDIATE16_SX8; pParam->size = sizeof(uint16_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "0%04Xh", (uint16_t)pParam->parval); } return sizeof(uint8_t); } //***************************************************************************** //***************************************************************************** unsigned ParseImmByteSX_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { return sizeof(uint8_t); } //***************************************************************************** //***************************************************************************** unsigned ParseImmUshort(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { pParam->parval = DISReadWord(pCpu, lpszCodeBlock); pParam->flags |= USE_IMMEDIATE16; pParam->size = sizeof(uint16_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "0%04Xh", (uint16_t)pParam->parval); return sizeof(uint16_t); } //***************************************************************************** //***************************************************************************** unsigned ParseImmUshort_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { return sizeof(uint16_t); } //***************************************************************************** //***************************************************************************** unsigned ParseImmUlong(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { pParam->parval = DISReadDWord(pCpu, lpszCodeBlock); pParam->flags |= USE_IMMEDIATE32; pParam->size = sizeof(uint32_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "0%08Xh", (uint32_t)pParam->parval); return sizeof(uint32_t); } //***************************************************************************** //***************************************************************************** unsigned ParseImmUlong_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { return sizeof(uint32_t); } //***************************************************************************** //***************************************************************************** unsigned ParseImmQword(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { pParam->parval = DISReadQWord(pCpu, lpszCodeBlock); pParam->flags |= USE_IMMEDIATE64; pParam->size = sizeof(uint64_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "0%08X", (uint32_t)pParam->parval); disasmAddStringF(&pParam->szParam[9], sizeof(pParam->szParam)-9, "%08Xh", (uint32_t)(pParam->parval >> 32)); return sizeof(uint64_t); } //***************************************************************************** //***************************************************************************** unsigned ParseImmQword_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { return sizeof(uint64_t); } //***************************************************************************** //***************************************************************************** unsigned ParseImmV(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { if (pCpu->opmode == CPUMODE_32BIT) { pParam->parval = DISReadDWord(pCpu, lpszCodeBlock); pParam->flags |= USE_IMMEDIATE32; pParam->size = sizeof(uint32_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "0%08Xh", (uint32_t)pParam->parval); return sizeof(uint32_t); } else if (pCpu->opmode == CPUMODE_64BIT) { pParam->parval = DISReadQWord(pCpu, lpszCodeBlock); pParam->flags |= USE_IMMEDIATE64; pParam->size = sizeof(uint64_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "0%VX64h", pParam->parval); return sizeof(uint64_t); } else { pParam->parval = DISReadWord(pCpu, lpszCodeBlock); pParam->flags |= USE_IMMEDIATE16; pParam->size = sizeof(uint16_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "0%04Xh", (uint32_t)pParam->parval); return sizeof(uint16_t); } } //***************************************************************************** //***************************************************************************** unsigned ParseImmV_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { if (pCpu->opmode == CPUMODE_32BIT) return sizeof(uint32_t); else if (pCpu->opmode == CPUMODE_64BIT) return sizeof(uint64_t); return sizeof(uint16_t); } //***************************************************************************** //***************************************************************************** unsigned ParseImmZ(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { /* Word for 16-bit operand-size or doubleword for 32 or 64-bit operand-size. */ if (pCpu->opmode == CPUMODE_16BIT) { pParam->parval = DISReadWord(pCpu, lpszCodeBlock); pParam->flags |= USE_IMMEDIATE16; pParam->size = sizeof(uint16_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "0%04Xh", (uint32_t)pParam->parval); return sizeof(uint16_t); } else { pParam->parval = DISReadDWord(pCpu, lpszCodeBlock); pParam->flags |= USE_IMMEDIATE32; pParam->size = sizeof(uint32_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "0%08Xh", (uint32_t)pParam->parval); return sizeof(uint32_t); } } //***************************************************************************** //***************************************************************************** unsigned ParseImmZ_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { /* Word for 16-bit operand-size or doubleword for 32 or 64-bit operand-size. */ if (pCpu->opmode == CPUMODE_16BIT) return sizeof(uint16_t); return sizeof(uint32_t); } //***************************************************************************** // Relative displacement for branches (rel. to next instruction) //***************************************************************************** unsigned ParseImmBRel(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { pParam->parval = DISReadByte(pCpu, lpszCodeBlock); pParam->flags |= USE_IMMEDIATE8_REL; pParam->size = sizeof(uint8_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), " (0%02Xh)", (uint32_t)pParam->parval); return sizeof(char); } //***************************************************************************** // Relative displacement for branches (rel. to next instruction) //***************************************************************************** unsigned ParseImmBRel_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { return sizeof(char); } //***************************************************************************** // Relative displacement for branches (rel. to next instruction) //***************************************************************************** unsigned ParseImmVRel(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { if (pCpu->opmode == CPUMODE_32BIT) { pParam->parval = DISReadDWord(pCpu, lpszCodeBlock); pParam->flags |= USE_IMMEDIATE32_REL; pParam->size = sizeof(int32_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), " (0%08Xh)", (uint32_t)pParam->parval); return sizeof(int32_t); } else if (pCpu->opmode == CPUMODE_64BIT) { pParam->parval = DISReadQWord(pCpu, lpszCodeBlock); pParam->flags |= USE_IMMEDIATE64_REL; pParam->size = sizeof(int64_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), " (0%VX64h)", pParam->parval); return sizeof(int64_t); } else { pParam->parval = DISReadWord(pCpu, lpszCodeBlock); pParam->flags |= USE_IMMEDIATE16_REL; pParam->size = sizeof(int16_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), " (0%04Xh)", (uint32_t)pParam->parval); return sizeof(uint16_t); } } //***************************************************************************** // Relative displacement for branches (rel. to next instruction) //***************************************************************************** unsigned ParseImmVRel_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { if (pCpu->opmode == CPUMODE_32BIT) return sizeof(int32_t); else if (pCpu->opmode == CPUMODE_64BIT) return sizeof(int64_t); return sizeof(uint16_t); } //***************************************************************************** //***************************************************************************** unsigned ParseImmAddr(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { disasmGetPtrString(pCpu, pOp, pParam); if (pCpu->addrmode == CPUMODE_32BIT) { if (OP_PARM_VSUBTYPE(pParam->param) == OP_PARM_p) {// far 16:32 pointer pParam->parval = DISReadDWord(pCpu, lpszCodeBlock); *((uint32_t*)&pParam->parval+1) = DISReadWord(pCpu, lpszCodeBlock+sizeof(uint32_t)); pParam->flags |= USE_IMMEDIATE_ADDR_16_32; pParam->size = sizeof(uint16_t) + sizeof(uint32_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "0%04X:0%08Xh", (uint32_t)(pParam->parval>>32), (uint32_t)pParam->parval); return sizeof(uint32_t) + sizeof(uint16_t); } else {// near 32 bits pointer /* * Note: used only in "mov al|ax|eax, [Addr]" and "mov [Addr], al|ax|eax" * so we treat it like displacement. */ pParam->disp32 = DISReadDWord(pCpu, lpszCodeBlock); pParam->flags |= USE_DISPLACEMENT32; pParam->size = sizeof(uint32_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "[0%08Xh]", pParam->disp32); return sizeof(uint32_t); } } else if (pCpu->addrmode == CPUMODE_64BIT) { Assert(OP_PARM_VSUBTYPE(pParam->param) != OP_PARM_p); /* near 64 bits pointer */ /* * Note: used only in "mov al|ax|eax, [Addr]" and "mov [Addr], al|ax|eax" * so we treat it like displacement. */ pParam->disp64 = DISReadQWord(pCpu, lpszCodeBlock); pParam->flags |= USE_DISPLACEMENT64; pParam->size = sizeof(uint64_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "[0%08X%08Xh]", (uint32_t)(pParam->disp64 >> 32), (uint32_t)pParam->disp64); return sizeof(uint64_t); } else { if (OP_PARM_VSUBTYPE(pParam->param) == OP_PARM_p) {// far 16:16 pointer pParam->parval = DISReadDWord(pCpu, lpszCodeBlock); pParam->flags |= USE_IMMEDIATE_ADDR_16_16; pParam->size = 2*sizeof(uint16_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "0%04X:0%04Xh", (uint32_t)(pParam->parval>>16), (uint16_t)pParam->parval ); return sizeof(uint32_t); } else {// near 16 bits pointer /* * Note: used only in "mov al|ax|eax, [Addr]" and "mov [Addr], al|ax|eax" * so we treat it like displacement. */ pParam->disp16 = DISReadWord(pCpu, lpszCodeBlock); pParam->flags |= USE_DISPLACEMENT16; pParam->size = sizeof(uint16_t); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "[0%04Xh]", (uint32_t)pParam->disp16); return sizeof(uint16_t); } } } //***************************************************************************** //***************************************************************************** unsigned ParseImmAddr_SizeOnly(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { if (pCpu->addrmode == CPUMODE_32BIT) { if (OP_PARM_VSUBTYPE(pParam->param) == OP_PARM_p) {// far 16:32 pointer return sizeof(uint32_t) + sizeof(uint16_t); } else {// near 32 bits pointer return sizeof(uint32_t); } } if (pCpu->addrmode == CPUMODE_64BIT) { Assert(OP_PARM_VSUBTYPE(pParam->param) != OP_PARM_p); return sizeof(uint64_t); } else { if (OP_PARM_VSUBTYPE(pParam->param) == OP_PARM_p) {// far 16:16 pointer return sizeof(uint32_t); } else {// near 16 bits pointer return sizeof(uint16_t); } } } //***************************************************************************** //***************************************************************************** unsigned ParseFixedReg(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { /* * Sets up flags for stored in OPC fixed registers. */ if (pParam->param == OP_PARM_NONE) { /* No parameter at all. */ return 0; } AssertCompile(OP_PARM_REG_GEN32_END < OP_PARM_REG_SEG_END); AssertCompile(OP_PARM_REG_SEG_END < OP_PARM_REG_GEN16_END); AssertCompile(OP_PARM_REG_GEN16_END < OP_PARM_REG_GEN8_END); AssertCompile(OP_PARM_REG_GEN8_END < OP_PARM_REG_FP_END); if (pParam->param <= OP_PARM_REG_GEN32_END) { /* 32-bit EAX..EDI registers. */ if (pCpu->opmode == CPUMODE_32BIT) { /* Use 32-bit registers. */ pParam->base.reg_gen = pParam->param - OP_PARM_REG_GEN32_START; pParam->flags |= USE_REG_GEN32; pParam->size = 4; } else if (pCpu->opmode == CPUMODE_64BIT) { /* Use 64-bit registers. */ pParam->base.reg_gen = pParam->param - OP_PARM_REG_GEN32_START; if ( (pOp->optype & OPTYPE_REXB_EXTENDS_OPREG) && pParam == &pCpu->param1 /* ugly assumption that it only applies to the first parameter */ && (pCpu->prefix & PREFIX_REX) && (pCpu->prefix_rex & PREFIX_REX_FLAGS)) pParam->base.reg_gen += 8; pParam->flags |= USE_REG_GEN64; pParam->size = 8; } else { /* Use 16-bit registers. */ pParam->base.reg_gen = pParam->param - OP_PARM_REG_GEN32_START; pParam->flags |= USE_REG_GEN16; pParam->size = 2; pParam->param = pParam->param - OP_PARM_REG_GEN32_START + OP_PARM_REG_GEN16_START; } } else if (pParam->param <= OP_PARM_REG_SEG_END) { /* Segment ES..GS registers. */ pParam->base.reg_seg = (DIS_SELREG)(pParam->param - OP_PARM_REG_SEG_START); pParam->flags |= USE_REG_SEG; pParam->size = 2; } else if (pParam->param <= OP_PARM_REG_GEN16_END) { /* 16-bit AX..DI registers. */ pParam->base.reg_gen = pParam->param - OP_PARM_REG_GEN16_START; pParam->flags |= USE_REG_GEN16; pParam->size = 2; } else if (pParam->param <= OP_PARM_REG_GEN8_END) { /* 8-bit AL..DL, AH..DH registers. */ pParam->base.reg_gen = pParam->param - OP_PARM_REG_GEN8_START; pParam->flags |= USE_REG_GEN8; pParam->size = 1; if (pCpu->opmode == CPUMODE_64BIT) { if ( (pOp->optype & OPTYPE_REXB_EXTENDS_OPREG) && pParam == &pCpu->param1 /* ugly assumption that it only applies to the first parameter */ && (pCpu->prefix & PREFIX_REX) && (pCpu->prefix_rex & PREFIX_REX_FLAGS)) pParam->base.reg_gen += 8; /* least significant byte of R8-R15 */ } } else if (pParam->param <= OP_PARM_REG_FP_END) { /* FPU registers. */ pParam->base.reg_fp = pParam->param - OP_PARM_REG_FP_START; pParam->flags |= USE_REG_FP; pParam->size = 10; } Assert(!(pParam->param >= OP_PARM_REG_GEN64_START && pParam->param <= OP_PARM_REG_GEN64_END)); /* else - not supported for now registers. */ return 0; } //***************************************************************************** //***************************************************************************** unsigned ParseXv(RTUINTPTR pu8CodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { disasmGetPtrString(pCpu, pOp, pParam); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), (pCpu->addrmode == CPUMODE_32BIT) ? "DS:ESI" : "DS:SI"); pParam->flags |= USE_POINTER_DS_BASED; if (pCpu->addrmode == CPUMODE_32BIT) { pParam->base.reg_gen = USE_REG_ESI; pParam->flags |= USE_REG_GEN32; } else if (pCpu->addrmode == CPUMODE_64BIT) { pParam->base.reg_gen = USE_REG_RSI; pParam->flags |= USE_REG_GEN64; } else { pParam->base.reg_gen = USE_REG_SI; pParam->flags |= USE_REG_GEN16; } return 0; //no additional opcode bytes } //***************************************************************************** //***************************************************************************** unsigned ParseXb(RTUINTPTR pu8CodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), (pCpu->addrmode == CPUMODE_32BIT) ? "DS:ESI" : "DS:SI"); pParam->flags |= USE_POINTER_DS_BASED; if (pCpu->addrmode == CPUMODE_32BIT) { pParam->base.reg_gen = USE_REG_ESI; pParam->flags |= USE_REG_GEN32; } else if (pCpu->addrmode == CPUMODE_64BIT) { pParam->base.reg_gen = USE_REG_RSI; pParam->flags |= USE_REG_GEN64; } else { pParam->base.reg_gen = USE_REG_SI; pParam->flags |= USE_REG_GEN16; } return 0; //no additional opcode bytes } //***************************************************************************** //***************************************************************************** unsigned ParseYv(RTUINTPTR pu8CodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { disasmGetPtrString(pCpu, pOp, pParam); disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), (pCpu->addrmode == CPUMODE_32BIT) ? "ES:EDI" : "ES:DI"); pParam->flags |= USE_POINTER_ES_BASED; if (pCpu->addrmode == CPUMODE_32BIT) { pParam->base.reg_gen = USE_REG_EDI; pParam->flags |= USE_REG_GEN32; } else if (pCpu->addrmode == CPUMODE_64BIT) { pParam->base.reg_gen = USE_REG_RDI; pParam->flags |= USE_REG_GEN64; } else { pParam->base.reg_gen = USE_REG_DI; pParam->flags |= USE_REG_GEN16; } return 0; //no additional opcode bytes } //***************************************************************************** //***************************************************************************** unsigned ParseYb(RTUINTPTR pu8CodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), (pCpu->addrmode == CPUMODE_32BIT) ? "ES:EDI" : "ES:DI"); pParam->flags |= USE_POINTER_ES_BASED; if (pCpu->addrmode == CPUMODE_32BIT) { pParam->base.reg_gen = USE_REG_EDI; pParam->flags |= USE_REG_GEN32; } else if (pCpu->addrmode == CPUMODE_64BIT) { pParam->base.reg_gen = USE_REG_RDI; pParam->flags |= USE_REG_GEN64; } else { pParam->base.reg_gen = USE_REG_DI; pParam->flags |= USE_REG_GEN16; } return 0; //no additional opcode bytes } //***************************************************************************** //***************************************************************************** unsigned ParseTwoByteEsc(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { const OPCODE *pOpcode; int size = sizeof(uint8_t); //2nd byte pCpu->opcode = DISReadByte(pCpu, lpszCodeBlock); pOpcode = &g_aTwoByteMapX86[pCpu->opcode]; /* Handle opcode table extensions that rely on the address, repe or repne prefix byte. */ /** @todo Should we take the first or last prefix byte in case of multiple prefix bytes??? */ if (pCpu->lastprefix) { switch (pCpu->lastprefix) { case OP_OPSIZE: /* 0x66 */ if (g_aTwoByteMapX86_PF66[pCpu->opcode].opcode != OP_INVALID) { /* Table entry is valid, so use the extension table. */ pOpcode = &g_aTwoByteMapX86_PF66[pCpu->opcode]; /* Cancel prefix changes. */ pCpu->prefix &= ~PREFIX_OPSIZE; pCpu->opmode = pCpu->mode; } break; case OP_REPNE: /* 0xF2 */ if (g_aTwoByteMapX86_PFF2[pCpu->opcode].opcode != OP_INVALID) { /* Table entry is valid, so use the extension table. */ pOpcode = &g_aTwoByteMapX86_PFF2[pCpu->opcode]; /* Cancel prefix changes. */ pCpu->prefix &= ~PREFIX_REPNE; } break; case OP_REPE: /* 0xF3 */ if (g_aTwoByteMapX86_PFF3[pCpu->opcode].opcode != OP_INVALID) { /* Table entry is valid, so use the extension table. */ pOpcode = &g_aTwoByteMapX86_PFF3[pCpu->opcode]; /* Cancel prefix changes. */ pCpu->prefix &= ~PREFIX_REP; } break; } } size += ParseInstruction(lpszCodeBlock+size, pOpcode, pCpu); return size; } //***************************************************************************** //***************************************************************************** unsigned ParseNopPause(RTUINTPTR pu8CodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = 0; if (pCpu->prefix & PREFIX_REP) { pOp = &g_aMapX86_NopPause[1]; /* PAUSE */ pCpu->prefix &= ~PREFIX_REP; } else pOp = &g_aMapX86_NopPause[0]; /* NOP */ size += ParseInstruction(pu8CodeBlock, pOp, pCpu); return size; } //***************************************************************************** //***************************************************************************** unsigned ParseImmGrpl(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { int idx = (pCpu->opcode - 0x80) * 8; unsigned size = 0, modrm, reg; modrm = DISReadByte(pCpu, lpszCodeBlock); reg = MODRM_REG(modrm); pOp = (PCOPCODE)&g_aMapX86_Group1[idx+reg]; //little hack to make sure the ModRM byte is included in the returned size if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM) size = sizeof(uint8_t); //ModRM byte size += ParseInstruction(lpszCodeBlock, pOp, pCpu); return size; } //***************************************************************************** //***************************************************************************** unsigned ParseShiftGrp2(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { int idx; unsigned size = 0, modrm, reg; switch (pCpu->opcode) { case 0xC0: case 0xC1: idx = (pCpu->opcode - 0xC0)*8; break; case 0xD0: case 0xD1: case 0xD2: case 0xD3: idx = (pCpu->opcode - 0xD0 + 2)*8; break; default: AssertMsgFailed(("Oops\n")); return sizeof(uint8_t); } modrm = DISReadByte(pCpu, lpszCodeBlock); reg = MODRM_REG(modrm); pOp = (PCOPCODE)&g_aMapX86_Group2[idx+reg]; //little hack to make sure the ModRM byte is included in the returned size if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM) size = sizeof(uint8_t); //ModRM byte size += ParseInstruction(lpszCodeBlock, pOp, pCpu); return size; } //***************************************************************************** //***************************************************************************** unsigned ParseGrp3(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { int idx = (pCpu->opcode - 0xF6) * 8; unsigned size = 0, modrm, reg; modrm = DISReadByte(pCpu, lpszCodeBlock); reg = MODRM_REG(modrm); pOp = (PCOPCODE)&g_aMapX86_Group3[idx+reg]; //little hack to make sure the ModRM byte is included in the returned size if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM) size = sizeof(uint8_t); //ModRM byte size += ParseInstruction(lpszCodeBlock, pOp, pCpu); return size; } //***************************************************************************** //***************************************************************************** unsigned ParseGrp4(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = 0, modrm, reg; modrm = DISReadByte(pCpu, lpszCodeBlock); reg = MODRM_REG(modrm); pOp = (PCOPCODE)&g_aMapX86_Group4[reg]; //little hack to make sure the ModRM byte is included in the returned size if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM) size = sizeof(uint8_t); //ModRM byte size += ParseInstruction(lpszCodeBlock, pOp, pCpu); return size; } //***************************************************************************** //***************************************************************************** unsigned ParseGrp5(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = 0, modrm, reg; modrm = DISReadByte(pCpu, lpszCodeBlock); reg = MODRM_REG(modrm); pOp = (PCOPCODE)&g_aMapX86_Group5[reg]; //little hack to make sure the ModRM byte is included in the returned size if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM) size = sizeof(uint8_t); //ModRM byte size += ParseInstruction(lpszCodeBlock, pOp, pCpu); return size; } //***************************************************************************** // 0xF 0xF [ModRM] [SIB] [displacement] imm8_opcode // It would appear the ModRM byte must always be present. How else can you // determine the offset of the imm8_opcode byte otherwise? // //***************************************************************************** unsigned Parse3DNow(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = 0, modrmsize; #ifdef DEBUG_Sander //needs testing AssertMsgFailed(("Test me\n")); #endif unsigned ModRM = DISReadByte(pCpu, lpszCodeBlock); pCpu->ModRM.Bits.Rm = MODRM_RM(ModRM); pCpu->ModRM.Bits.Mod = MODRM_MOD(ModRM); pCpu->ModRM.Bits.Reg = MODRM_REG(ModRM); modrmsize = QueryModRM(lpszCodeBlock+sizeof(uint8_t), pOp, pParam, pCpu); uint8_t opcode = DISReadByte(pCpu, lpszCodeBlock+sizeof(uint8_t)+modrmsize); pOp = (PCOPCODE)&g_aTwoByteMapX86_3DNow[opcode]; //little hack to make sure the ModRM byte is included in the returned size if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM) { #ifdef DEBUG_Sander /* bird, 2005-06-28: Alex is getting this during full installation of win2ksp4. */ AssertMsgFailed(("Oops!\n")); //shouldn't happen! #endif size = sizeof(uint8_t); //ModRM byte } size += ParseInstruction(lpszCodeBlock, pOp, pCpu); size += sizeof(uint8_t); //imm8_opcode uint8_t return size; } //***************************************************************************** //***************************************************************************** unsigned ParseGrp6(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = 0, modrm, reg; modrm = DISReadByte(pCpu, lpszCodeBlock); reg = MODRM_REG(modrm); pOp = (PCOPCODE)&g_aMapX86_Group6[reg]; //little hack to make sure the ModRM byte is included in the returned size if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM) size = sizeof(uint8_t); //ModRM byte size += ParseInstruction(lpszCodeBlock, pOp, pCpu); return size; } //***************************************************************************** //***************************************************************************** unsigned ParseGrp7(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = 0, modrm, reg, rm, mod; modrm = DISReadByte(pCpu, lpszCodeBlock); mod = MODRM_MOD(modrm); reg = MODRM_REG(modrm); rm = MODRM_RM(modrm); if (mod == 3 && rm == 0) pOp = (PCOPCODE)&g_aMapX86_Group7_mod11_rm000[reg]; else if (mod == 3 && rm == 1) pOp = (PCOPCODE)&g_aMapX86_Group7_mod11_rm001[reg]; else pOp = (PCOPCODE)&g_aMapX86_Group7_mem[reg]; //little hack to make sure the ModRM byte is included in the returned size if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM) size = sizeof(uint8_t); //ModRM byte size += ParseInstruction(lpszCodeBlock, pOp, pCpu); return size; } //***************************************************************************** //***************************************************************************** unsigned ParseGrp8(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = 0, modrm, reg; modrm = DISReadByte(pCpu, lpszCodeBlock); reg = MODRM_REG(modrm); pOp = (PCOPCODE)&g_aMapX86_Group8[reg]; //little hack to make sure the ModRM byte is included in the returned size if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM) size = sizeof(uint8_t); //ModRM byte size += ParseInstruction(lpszCodeBlock, pOp, pCpu); return size; } //***************************************************************************** //***************************************************************************** unsigned ParseGrp9(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = 0, modrm, reg; modrm = DISReadByte(pCpu, lpszCodeBlock); reg = MODRM_REG(modrm); pOp = (PCOPCODE)&g_aMapX86_Group9[reg]; //little hack to make sure the ModRM byte is included in the returned size if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM) size = sizeof(uint8_t); //ModRM byte size += ParseInstruction(lpszCodeBlock, pOp, pCpu); return size; } //***************************************************************************** //***************************************************************************** unsigned ParseGrp10(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = 0, modrm, reg; modrm = DISReadByte(pCpu, lpszCodeBlock); reg = MODRM_REG(modrm); pOp = (PCOPCODE)&g_aMapX86_Group10[reg]; //little hack to make sure the ModRM byte is included in the returned size if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM) size = sizeof(uint8_t); //ModRM byte size += ParseInstruction(lpszCodeBlock, pOp, pCpu); return size; } //***************************************************************************** //***************************************************************************** unsigned ParseGrp12(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = 0, modrm, reg; modrm = DISReadByte(pCpu, lpszCodeBlock); reg = MODRM_REG(modrm); if (pCpu->prefix & PREFIX_OPSIZE) reg += 8; //2nd table pOp = (PCOPCODE)&g_aMapX86_Group12[reg]; //little hack to make sure the ModRM byte is included in the returned size if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM) size = sizeof(uint8_t); //ModRM byte size += ParseInstruction(lpszCodeBlock, pOp, pCpu); return size; } //***************************************************************************** //***************************************************************************** unsigned ParseGrp13(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = 0, modrm, reg; modrm = DISReadByte(pCpu, lpszCodeBlock); reg = MODRM_REG(modrm); if (pCpu->prefix & PREFIX_OPSIZE) reg += 8; //2nd table pOp = (PCOPCODE)&g_aMapX86_Group13[reg]; //little hack to make sure the ModRM byte is included in the returned size if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM) size = sizeof(uint8_t); //ModRM byte size += ParseInstruction(lpszCodeBlock, pOp, pCpu); return size; } //***************************************************************************** //***************************************************************************** unsigned ParseGrp14(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = 0, modrm, reg; modrm = DISReadByte(pCpu, lpszCodeBlock); reg = MODRM_REG(modrm); if (pCpu->prefix & PREFIX_OPSIZE) reg += 8; //2nd table pOp = (PCOPCODE)&g_aMapX86_Group14[reg]; //little hack to make sure the ModRM byte is included in the returned size if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM) size = sizeof(uint8_t); //ModRM byte size += ParseInstruction(lpszCodeBlock, pOp, pCpu); return size; } //***************************************************************************** //***************************************************************************** unsigned ParseGrp15(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = 0, modrm, reg, mod, rm; modrm = DISReadByte(pCpu, lpszCodeBlock); mod = MODRM_MOD(modrm); reg = MODRM_REG(modrm); rm = MODRM_RM(modrm); if (mod == 3 && rm == 0) pOp = (PCOPCODE)&g_aMapX86_Group15_mod11_rm000[reg]; else pOp = (PCOPCODE)&g_aMapX86_Group15_mem[reg]; //little hack to make sure the ModRM byte is included in the returned size if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM) size = sizeof(uint8_t); //ModRM byte size += ParseInstruction(lpszCodeBlock, pOp, pCpu); return size; } //***************************************************************************** //***************************************************************************** unsigned ParseGrp16(RTUINTPTR lpszCodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu) { unsigned size = 0, modrm, reg; modrm = DISReadByte(pCpu, lpszCodeBlock); reg = MODRM_REG(modrm); pOp = (PCOPCODE)&g_aMapX86_Group16[reg]; //little hack to make sure the ModRM byte is included in the returned size if (pOp->idxParse1 != IDX_ParseModRM && pOp->idxParse2 != IDX_ParseModRM) size = sizeof(uint8_t); //ModRM byte size += ParseInstruction(lpszCodeBlock, pOp, pCpu); return size; } //***************************************************************************** #if !defined(DIS_CORE_ONLY) && defined(LOG_ENABLED) static const char *szModRMReg8[] = {"AL", "CL", "DL", "BL", "AH", "CH", "DH", "BH"}; static const char *szModRMReg8_64[] = {"AL", "CL", "DL", "BL", "AH", "CH", "DH", "BH", "R8L", "R9L", "R10L", "R11L", "R12L", "R13L", "R14L", "R15L"}; static const char *szModRMReg16[] = {"AX", "CX", "DX", "BX", "SP", "BP", "SI", "DI"}; static const char *szModRMReg32[] = {"EAX", "ECX", "EDX", "EBX", "ESP", "EBP", "ESI", "EDI"}; static const char *szModRMReg64[] = {"RAX", "RCX", "RDX", "RBX", "RSP", "RBP", "RSI", "RDI", "R8", "R9", "R10", "R11", "R12", "R13", "R14", "R15"}; static const char *szModRMReg1616[8] = {"BX+SI", "BX+DI", "BP+SI", "BP+DI", "SI", "DI", "BP", "BX"}; #endif static const char *szModRMSegReg[6] = {"ES", "CS", "SS", "DS", "FS", "GS"}; 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}; static const int IndexModRMReg16[4] = { USE_REG_SI, USE_REG_DI, USE_REG_SI, USE_REG_DI}; //***************************************************************************** void disasmModRMReg(PDISCPUSTATE pCpu, PCOPCODE pOp, unsigned idx, POP_PARAMETER pParam, int fRegAddr) { int subtype, type, mod; mod = pCpu->ModRM.Bits.Mod; type = OP_PARM_VTYPE(pParam->param); subtype = OP_PARM_VSUBTYPE(pParam->param); if (fRegAddr) subtype = (pCpu->addrmode == CPUMODE_64BIT) ? OP_PARM_q : OP_PARM_d; else if (subtype == OP_PARM_v || subtype == OP_PARM_NONE) { switch(pCpu->opmode) { case CPUMODE_32BIT: subtype = OP_PARM_d; break; case CPUMODE_64BIT: subtype = OP_PARM_q; break; case CPUMODE_16BIT: subtype = OP_PARM_w; break; default: /* make gcc happy */ break; } } switch (subtype) { case OP_PARM_b: #if !defined(DIS_CORE_ONLY) && defined(LOG_ENABLED) if (idx > RT_ELEMENTS(szModRMReg8)) disasmAddString(pParam->szParam, szModRMReg8_64[idx]); else disasmAddString(pParam->szParam, szModRMReg8[idx]); #endif pParam->flags |= USE_REG_GEN8; pParam->base.reg_gen = idx; break; case OP_PARM_w: disasmAddString(pParam->szParam, szModRMReg16[idx]); pParam->flags |= USE_REG_GEN16; pParam->base.reg_gen = idx; break; case OP_PARM_d: disasmAddString(pParam->szParam, szModRMReg32[idx]); pParam->flags |= USE_REG_GEN32; pParam->base.reg_gen = idx; break; case OP_PARM_q: disasmAddString(pParam->szParam, szModRMReg64[idx]); pParam->flags |= USE_REG_GEN64; pParam->base.reg_gen = idx; break; default: #ifdef IN_RING3 Log(("disasmModRMReg %x:%x failed!!\n", type, subtype)); DIS_THROW(ExceptionInvalidModRM); #else AssertMsgFailed(("Oops!\n")); #endif break; } } //***************************************************************************** //***************************************************************************** void disasmModRMReg16(PDISCPUSTATE pCpu, PCOPCODE pOp, unsigned idx, POP_PARAMETER pParam) { disasmAddString(pParam->szParam, szModRMReg1616[idx]); pParam->flags |= USE_REG_GEN16; pParam->base.reg_gen = BaseModRMReg16[idx]; if (idx < 4) { pParam->flags |= USE_INDEX; pParam->index.reg_gen = IndexModRMReg16[idx]; } } //***************************************************************************** //***************************************************************************** void disasmModRMSReg(PDISCPUSTATE pCpu, PCOPCODE pOp, unsigned idx, POP_PARAMETER pParam) { #if 0 //def DEBUG_Sander AssertMsg(idx < ELEMENTS(szModRMSegReg), ("idx=%d\n", idx)); #endif #ifdef IN_RING3 if (idx >= ELEMENTS(szModRMSegReg)) { Log(("disasmModRMSReg %d failed!!\n", idx)); DIS_THROW(ExceptionInvalidParameter); } #endif idx = RT_MIN(idx, ELEMENTS(szModRMSegReg)-1); disasmAddString(pParam->szParam, szModRMSegReg[idx]); pParam->flags |= USE_REG_SEG; pParam->base.reg_seg = (DIS_SELREG)idx; } //***************************************************************************** //***************************************************************************** void disasmPrintAbs32(POP_PARAMETER pParam) { disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "%08Xh", pParam->disp32); } //***************************************************************************** //***************************************************************************** void disasmPrintDisp32(POP_PARAMETER pParam) { disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "%08Xh", pParam->disp32); } //***************************************************************************** //***************************************************************************** void disasmPrintDisp8(POP_PARAMETER pParam) { disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "%d", pParam->disp8); } //***************************************************************************** //***************************************************************************** void disasmPrintDisp16(POP_PARAMETER pParam) { disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "%04Xh", pParam->disp16); } //***************************************************************************** //***************************************************************************** void disasmGetPtrString(PDISCPUSTATE pCpu, PCOPCODE pOp, POP_PARAMETER pParam) { int subtype = OP_PARM_VSUBTYPE(pParam->param); if (subtype == OP_PARM_v) { switch(pCpu->opmode) { case CPUMODE_32BIT: subtype = OP_PARM_d; break; case CPUMODE_64BIT: subtype = OP_PARM_q; break; case CPUMODE_16BIT: subtype = OP_PARM_w; break; default: /* make gcc happy */ break; } } switch (subtype) { case OP_PARM_a: //two words or dwords depending on operand size (bound only) break; case OP_PARM_b: disasmAddString(pParam->szParam, "byte ptr "); break; case OP_PARM_w: disasmAddString(pParam->szParam, "word ptr "); break; case OP_PARM_d: disasmAddString(pParam->szParam, "dword ptr "); break; case OP_PARM_q: case OP_PARM_dq: disasmAddString(pParam->szParam, "qword ptr "); break; case OP_PARM_p: disasmAddString(pParam->szParam, "far ptr "); break; case OP_PARM_s: break; //?? case OP_PARM_z: break; default: break; //no pointer type specified/necessary } if (pCpu->prefix & PREFIX_SEG) disasmAddStringF(pParam->szParam, sizeof(pParam->szParam), "%s:", szModRMSegReg[pCpu->enmPrefixSeg]); } #ifndef IN_GC //***************************************************************************** /* Read functions for getting the opcode bytes */ //***************************************************************************** uint8_t DISReadByte(PDISCPUSTATE pCpu, RTUINTPTR pAddress) { if (pCpu->pfnReadBytes) { uint8_t temp = 0; int rc; rc = pCpu->pfnReadBytes(pAddress, &temp, sizeof(temp), pCpu); if (VBOX_FAILURE(rc)) { Log(("DISReadByte failed!!\n")); DIS_THROW(ExceptionMemRead); } return temp; } #ifdef IN_RING0 AssertMsgFailed(("DISReadByte with no read callback in ring 0!!\n")); return 0; #else else return *(uint8_t *)pAddress; #endif } //***************************************************************************** //***************************************************************************** uint16_t DISReadWord(PDISCPUSTATE pCpu, RTUINTPTR pAddress) { if (pCpu->pfnReadBytes) { uint16_t temp = 0; int rc; rc = pCpu->pfnReadBytes(pAddress, (uint8_t*)&temp, sizeof(temp), pCpu); if (VBOX_FAILURE(rc)) { Log(("DISReadWord failed!!\n")); DIS_THROW(ExceptionMemRead); } return temp; } #ifdef IN_RING0 AssertMsgFailed(("DISReadWord with no read callback in ring 0!!\n")); return 0; #else else return *(uint16_t *)pAddress; #endif } //***************************************************************************** //***************************************************************************** uint32_t DISReadDWord(PDISCPUSTATE pCpu, RTUINTPTR pAddress) { if (pCpu->pfnReadBytes) { uint32_t temp = 0; int rc; rc = pCpu->pfnReadBytes(pAddress, (uint8_t*)&temp, sizeof(temp), pCpu); if (VBOX_FAILURE(rc)) { Log(("DISReadDWord failed!!\n")); DIS_THROW(ExceptionMemRead); } return temp; } #ifdef IN_RING0 AssertMsgFailed(("DISReadDWord with no read callback in ring 0!!\n")); return 0; #else else return *(uint32_t *)pAddress; #endif } //***************************************************************************** //***************************************************************************** uint64_t DISReadQWord(PDISCPUSTATE pCpu, RTUINTPTR pAddress) { if (pCpu->pfnReadBytes) { uint64_t temp = 0; int rc; rc = pCpu->pfnReadBytes(pAddress, (uint8_t*)&temp, sizeof(temp), pCpu); if (VBOX_FAILURE(rc)) { Log(("DISReadQWord %x failed!!\n", pAddress)); DIS_THROW(ExceptionMemRead); } return temp; } #ifdef IN_RING0 AssertMsgFailed(("DISReadQWord with no read callback in ring 0!!\n")); return 0; #else else return *(uint64_t *)pAddress; #endif } #endif /* IN_GC */ #if !defined(DIS_CORE_ONLY) && defined(LOG_ENABLED) //***************************************************************************** //***************************************************************************** void disasmAddString(char *psz, const char *pszAdd) { strcat(psz, pszAdd); } //***************************************************************************** //***************************************************************************** void disasmAddStringF(char *psz, uint32_t size, const char *pszFormat, ...) { va_list args; va_start(args, pszFormat); RTStrPrintfV(psz + strlen(psz), size, pszFormat, args); va_end(args); } //***************************************************************************** //***************************************************************************** void disasmAddChar(char *psz, char ch) { char sz[2]; sz[0] = ch; sz[1] = '\0'; strcat(psz, sz); } #endif /* !DIS_CORE_ONLY */ /** * Validates the lock sequence. * * The AMD manual lists the following instructions: * ADC * ADD * AND * BTC * BTR * BTS * CMPXCHG * CMPXCHG8B * CMPXCHG16B * DEC * INC * NEG * NOT * OR * SBB * SUB * XADD * XCHG * XOR * * @param pCpu Fully dissassembled instruction. */ void disValidateLockSequence(PDISCPUSTATE pCpu) { Assert(pCpu->prefix & PREFIX_LOCK); /* * Filter out the valid lock sequences. */ switch (pCpu->pCurInstr->opcode) { /* simple: no variations */ case OP_CMPXCHG8B: /* == OP_CMPXCHG16B? */ return; /* simple: /r - reject register destination. */ case OP_BTC: case OP_BTR: case OP_BTS: case OP_CMPXCHG: case OP_XADD: if (pCpu->ModRM.Bits.Mod == 3) break; return; /* * Lots of variants but its sufficient to check that param 1 * is a memory operand. */ case OP_ADC: case OP_ADD: case OP_AND: case OP_DEC: case OP_INC: case OP_NEG: case OP_NOT: case OP_OR: case OP_SBB: case OP_SUB: case OP_XCHG: case OP_XOR: if (pCpu->param1.flags & (USE_BASE | USE_INDEX | USE_DISPLACEMENT32 | USE_DISPLACEMENT16 | USE_DISPLACEMENT8 | USE_RIPDISPLACEMENT32)) return; break; default: break; } /* * Invalid lock sequence, make it a OP_ILLUD2. */ pCpu->pCurInstr = &g_aTwoByteMapX86[11]; Assert(pCpu->pCurInstr->opcode == OP_ILLUD2); }