/** @file * DIS - The VirtualBox Disassembler. */ /* * Copyright (C) 2006-2007 innotek GmbH * * 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 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. */ #ifndef ___VBox_disasm_h #define ___VBox_disasm_h #include #include #include #include #if defined(__L4ENV__) #include #endif __BEGIN_DECLS /** CPU mode flags (DISCPUSTATE::mode). * @{ */ #define CPUMODE_16BIT 1 #define CPUMODE_32BIT 2 /** @} */ /** Prefix byte flags * @{ */ #define PREFIX_NONE 0 /** non-default address size. */ #define PREFIX_ADDRSIZE 1 /** non-default operand size. */ #define PREFIX_OPSIZE 2 /** lock prefix. */ #define PREFIX_LOCK 4 /** segment prefix. */ #define PREFIX_SEG 8 /** rep(e) prefix (not a prefix, but we'll treat is as one). */ #define PREFIX_REP 16 /** rep(e) prefix (not a prefix, but we'll treat is as one). */ #define PREFIX_REPNE 32 /** @} */ /** * Operand type. */ #define OPTYPE_INVALID BIT(0) #define OPTYPE_HARMLESS BIT(1) #define OPTYPE_CONTROLFLOW BIT(2) #define OPTYPE_POTENTIALLY_DANGEROUS BIT(3) #define OPTYPE_DANGEROUS BIT(4) #define OPTYPE_PORTIO BIT(5) #define OPTYPE_PRIVILEGED BIT(6) #define OPTYPE_PRIVILEGED_NOTRAP BIT(7) #define OPTYPE_UNCOND_CONTROLFLOW BIT(8) #define OPTYPE_RELATIVE_CONTROLFLOW BIT(9) #define OPTYPE_COND_CONTROLFLOW BIT(10) #define OPTYPE_INTERRUPT BIT(11) #define OPTYPE_ILLEGAL BIT(12) #define OPTYPE_RRM_DANGEROUS BIT(14) /**< Some additional dangerouse ones when recompiling raw r0. */ #define OPTYPE_RRM_DANGEROUS_16 BIT(15) /**< Some additional dangerouse ones when recompiling 16-bit raw r0. */ #define OPTYPE_RRM_MASK (OPTYPE_RRM_DANGEROUS | OPTYPE_RRM_DANGEROUS_16) #define OPTYPE_INHIBIT_IRQS BIT(16) /**< Will or can inhibit irqs (sti, pop ss, mov ss) */ #define OPTYPE_PORTIO_READ BIT(17) #define OPTYPE_PORTIO_WRITE BIT(18) #define OPTYPE_ALL (0xffffffff) /** Parameter usage flags. * @{ */ #define USE_BASE BIT(0) #define USE_INDEX BIT(1) #define USE_SCALE BIT(2) #define USE_REG_GEN8 BIT(3) #define USE_REG_GEN16 BIT(4) #define USE_REG_GEN32 BIT(5) #define USE_REG_FP BIT(6) #define USE_REG_MMX BIT(7) #define USE_REG_XMM BIT(8) #define USE_REG_CR BIT(9) #define USE_REG_DBG BIT(10) #define USE_REG_SEG BIT(11) #define USE_REG_TEST BIT(12) #define USE_DISPLACEMENT8 BIT(13) #define USE_DISPLACEMENT16 BIT(14) #define USE_DISPLACEMENT32 BIT(15) #define USE_IMMEDIATE8 BIT(16) #define USE_IMMEDIATE8_REL BIT(17) #define USE_IMMEDIATE16 BIT(18) #define USE_IMMEDIATE16_REL BIT(19) #define USE_IMMEDIATE32 BIT(20) #define USE_IMMEDIATE32_REL BIT(21) #define USE_IMMEDIATE64 BIT(22) #define USE_IMMEDIATE_ADDR_0_32 BIT(23) #define USE_IMMEDIATE_ADDR_16_32 BIT(24) #define USE_IMMEDIATE_ADDR_0_16 BIT(25) #define USE_IMMEDIATE_ADDR_16_16 BIT(26) /** DS:ESI */ #define USE_POINTER_DS_BASED BIT(27) /** ES:EDI */ #define USE_POINTER_ES_BASED BIT(28) #define USE_IMMEDIATE16_SX8 BIT(29) #define USE_IMMEDIATE32_SX8 BIT(30) #define USE_IMMEDIATE (USE_IMMEDIATE8|USE_IMMEDIATE16|USE_IMMEDIATE32|USE_IMMEDIATE64|USE_IMMEDIATE8_REL|USE_IMMEDIATE16_REL|USE_IMMEDIATE32_REL|USE_IMMEDIATE_ADDR_0_32|USE_IMMEDIATE_ADDR_16_32|USE_IMMEDIATE_ADDR_0_16|USE_IMMEDIATE_ADDR_16_16|USE_IMMEDIATE16_SX8|USE_IMMEDIATE32_SX8) /** @} */ /** index in {"EAX", "ECX", "EDX", "EBX", "ESP", "EBP", "ESI", "EDI"} * @{ */ #define USE_REG_EAX 0 #define USE_REG_ECX 1 #define USE_REG_EDX 2 #define USE_REG_EBX 3 #define USE_REG_ESP 4 #define USE_REG_EBP 5 #define USE_REG_ESI 6 #define USE_REG_EDI 7 /** @} */ /** index in {"AX", "CX", "DX", "BX", "SP", "BP", "SI", "DI"} * @{ */ #define USE_REG_AX 0 #define USE_REG_CX 1 #define USE_REG_DX 2 #define USE_REG_BX 3 #define USE_REG_SP 4 #define USE_REG_BP 5 #define USE_REG_SI 6 #define USE_REG_DI 7 /** @} */ /** index in {"AL", "CL", "DL", "BL", "AH", "CH", "DH", "BH"} * @{ */ #define USE_REG_AL 0 #define USE_REG_CL 1 #define USE_REG_DL 2 #define USE_REG_BL 3 #define USE_REG_AH 4 #define USE_REG_CH 5 #define USE_REG_DH 6 #define USE_REG_BH 7 /** @} */ /** index in {ES, CS, SS, DS, FS, GS} * @{ */ #define USE_REG_ES 0 #define USE_REG_CS 1 #define USE_REG_SS 2 #define USE_REG_DS 3 #define USE_REG_FS 4 #define USE_REG_GS 5 /** @} */ #define USE_REG_FP0 0 #define USE_REG_FP1 1 #define USE_REG_FP2 2 #define USE_REG_FP3 3 #define USE_REG_FP4 4 #define USE_REG_FP5 5 #define USE_REG_FP6 6 #define USE_REG_FP7 7 #define USE_REG_CR0 0 #define USE_REG_CR1 1 #define USE_REG_CR2 2 #define USE_REG_CR3 3 #define USE_REG_CR4 4 #define USE_REG_DR0 0 #define USE_REG_DR1 1 #define USE_REG_DR2 2 #define USE_REG_DR3 3 #define USE_REG_DR4 4 #define USE_REG_DR5 5 #define USE_REG_DR6 6 #define USE_REG_DR7 7 #define USE_REG_MMX0 0 #define USE_REG_MMX1 1 #define USE_REG_MMX2 2 #define USE_REG_MMX3 3 #define USE_REG_MMX4 4 #define USE_REG_MMX5 5 #define USE_REG_MMX6 6 #define USE_REG_MMX7 7 #define USE_REG_XMM0 0 #define USE_REG_XMM1 1 #define USE_REG_XMM2 2 #define USE_REG_XMM3 3 #define USE_REG_XMM4 4 #define USE_REG_XMM5 5 #define USE_REG_XMM6 6 #define USE_REG_XMM7 7 /** Used by DISQueryParamVal & EMIQueryParamVal * @{ */ #define PARAM_VAL8 BIT(0) #define PARAM_VAL16 BIT(1) #define PARAM_VAL32 BIT(2) #define PARAM_VAL64 BIT(3) #define PARAM_VALFARPTR16 BIT(4) #define PARAM_VALFARPTR32 BIT(5) #define PARMTYPE_REGISTER 1 #define PARMTYPE_ADDRESS 2 #define PARMTYPE_IMMEDIATE 3 typedef struct { uint32_t type; uint32_t flags; uint32_t size; union { uint8_t val8; uint16_t val16; uint32_t val32; uint64_t val64; struct { uint16_t sel; uint32_t offset; } farptr; } val; } OP_PARAMVAL; /** Pointer to opcode parameter value. */ typedef OP_PARAMVAL *POP_PARAMVAL; typedef enum { PARAM_DEST, PARAM_SOURCE } PARAM_TYPE; /** @} */ /** * Operand Parameter. */ typedef struct _OP_PARAMETER { int param; uint64_t parval; char szParam[32]; int32_t disp8, disp16, disp32; uint32_t flags; uint32_t size; union { uint32_t reg_gen8; uint32_t reg_gen16; uint32_t reg_gen32; /** ST(0) - ST(7) */ uint32_t reg_fp; /** MMX0 - MMX7 */ uint32_t reg_mmx; /** XMM0 - XMM7 */ uint32_t reg_xmm; /** {ES, CS, SS, DS, FS, GS} */ uint32_t reg_seg; /** TR0-TR7 (?) */ uint32_t reg_test; /** CR0-CR4 */ uint32_t reg_ctrl; /** DR0-DR7 */ uint32_t reg_dbg; } base; union { uint32_t reg_gen; } index; /** 2, 4 or 8. */ uint32_t scale; } OP_PARAMETER; /** Pointer to opcode parameter. */ typedef OP_PARAMETER *POP_PARAMETER; /** Pointer to opcode parameter. */ typedef const OP_PARAMETER *PCOP_PARAMETER; struct _OPCODE; /** Pointer to opcode. */ typedef struct _OPCODE *POPCODE; /** Pointer to const opcode. */ typedef const struct _OPCODE *PCOPCODE; typedef DECLCALLBACK(int32_t) FN_DIS_READBYTES(RTUINTPTR pSrc, uint8_t *pDest, uint32_t size, RTUINTPTR dwUserdata); typedef FN_DIS_READBYTES *PFN_DIS_READBYTES; /* forward decl */ struct _DISCPUSTATE; /** Pointer to the disassembler CPU state. */ typedef struct _DISCPUSTATE *PDISCPUSTATE; /** Parser callback. * @remark no DECLCALLBACK() here because it's considered to be internal (really, I'm too lazy to update all the functions). */ typedef int FNDISPARSE(RTUINTPTR pu8CodeBlock, PCOPCODE pOp, POP_PARAMETER pParam, PDISCPUSTATE pCpu); typedef FNDISPARSE *PFNDISPARSE; typedef struct _DISCPUSTATE { /* Global setting */ uint32_t mode; /* Per instruction prefix settings */ uint32_t prefix; /** segment prefix value. */ uint32_t prefix_seg; /** addressing mode (16 or 32 bits). (CPUMODE_*) */ uint32_t addrmode; /** operand mode (16 or 32 bits). (CPUMODE_*) */ uint32_t opmode; OP_PARAMETER param1; OP_PARAMETER param2; OP_PARAMETER param3; /** ModRM byte. */ uint32_t ModRM; /** scalar, index, base byte. */ uint32_t SIB; int32_t disp; /** First opcode byte of instruction. */ uint8_t opcode; /** Last prefix byte (for SSE2 extension tables) */ uint8_t lastprefix; RTUINTPTR opaddr; uint32_t opsize; #ifndef DIS_CORE_ONLY /** Opcode format string for current instruction. */ const char *pszOpcode; #endif /** Internal: pointer to disassembly function table */ PFNDISPARSE *pfnDisasmFnTable; /** Internal: instruction filter */ uint32_t uFilter; /** Pointer to the current instruction. */ PCOPCODE pCurInstr; RTUINTPTR dwUserData[3]; /** Optional read function */ PFN_DIS_READBYTES pfnReadBytes; #ifdef __L4ENV__ jmp_buf *pJumpBuffer; #endif /* __L4ENV__ */ } DISCPUSTATE; /** Opcode. */ #pragma pack(4) typedef struct _OPCODE { #ifndef DIS_CORE_ONLY const char *pszOpcode; #endif uint8_t idxParse1; uint8_t idxParse2; uint8_t idxParse3; uint16_t opcode; uint16_t param1; uint16_t param2; uint16_t param3; uint32_t optype; } OPCODE; #pragma pack() /** * Disassembles a code block. * * @returns Success indicator. * @param pCpu Pointer to cpu structure which have DISCPUSTATE::mode * set correctly. * @param pvCodeBlock Pointer to the strunction to disassemble. * @param cbMax Maximum number of bytes to disassemble. * @param pcbSize Where to store the size of the instruction. * NULL is allowed. * * * @todo Define output callback. * @todo Using signed integers as sizes is a bit odd. There are still * some GCC warnings about mixing signed and unsigend integers. * @todo Need to extend this interface to include a code address so we * can dissassemble GC code. Perhaps a new function is better... * @remark cbMax isn't respected as a boundry. DISInstr() will read beyond cbMax. * This means *pcbSize >= cbMax sometimes. */ DISDECL(bool) DISBlock(PDISCPUSTATE pCpu, RTUINTPTR pvCodeBlock, int32_t cbMax, uint32_t *pSize); /** * Disassembles one instruction * * @returns Success indicator. * @param pCpu Pointer to cpu structure which have DISCPUSTATE::mode * set correctly. * @param pu8Instruction Pointer to the instrunction to disassemble. * @param u32EipOffset Offset to add to instruction address to get the real virtual address * @param pcbSize Where to store the size of the instruction. * NULL is allowed. * @param pszOutput Storage for disassembled instruction * * @todo Define output callback. */ DISDECL(bool) DISInstr(PDISCPUSTATE pCpu, RTUINTPTR pu8Instruction, uint32_t u32EipOffset, uint32_t *pcbSize, char *pszOutput); /** * Disassembles one instruction * * @returns Success indicator. * @param pCpu Pointer to cpu structure which have DISCPUSTATE::mode * set correctly. * @param pu8Instruction Pointer to the strunction to disassemble. * @param u32EipOffset Offset to add to instruction address to get the real virtual address * @param pcbSize Where to store the size of the instruction. * NULL is allowed. * @param pszOutput Storage for disassembled instruction * @param uFilter Instruction type filter * * @todo Define output callback. */ DISDECL(bool) DISInstrEx(PDISCPUSTATE pCpu, RTUINTPTR pu8Instruction, uint32_t u32EipOffset, uint32_t *pcbSize, char *pszOutput, uint32_t uFilter); /** * 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(bool) DISCoreOne(PDISCPUSTATE pCpu, RTUINTPTR InstructionAddr, unsigned *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 CpuMode 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 dwUserData[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, unsigned CpuMode, PFN_DIS_READBYTES pfnReadBytes, void *pvUser, PDISCPUSTATE pCpu, unsigned *pcbInstruction); DISDECL(int) DISGetParamSize(PDISCPUSTATE pCpu, POP_PARAMETER pParam); DISDECL(int) DISDetectSegReg(PDISCPUSTATE pCpu, POP_PARAMETER pParam); DISDECL(uint8_t) DISQuerySegPrefixByte(PDISCPUSTATE pCpu); /** * Returns the value of the parameter in pParam * * @returns VBox error code * @param pCtx Exception structure pointer * @param pCpu Pointer to cpu structure which have DISCPUSTATE::mode * set correctly. * @param pParam Pointer to the parameter to parse * @param pParamVal Pointer to parameter value (OUT) * @param parmtype Parameter type * * @note Currently doesn't handle FPU/XMM/MMX/3DNow! parameters correctly!! * */ DISDECL(int) DISQueryParamVal(PCPUMCTXCORE pCtx, PDISCPUSTATE pCpu, POP_PARAMETER pParam, POP_PARAMVAL pParamVal, PARAM_TYPE parmtype); DISDECL(int) DISFetchReg8(PCPUMCTXCORE pCtx, uint32_t reg8, uint8_t *pVal); DISDECL(int) DISFetchReg16(PCPUMCTXCORE pCtx, uint32_t reg16, uint16_t *pVal); DISDECL(int) DISFetchReg32(PCPUMCTXCORE pCtx, uint32_t reg32, uint32_t *pVal); DISDECL(int) DISFetchRegSeg(PCPUMCTXCORE pCtx, uint32_t sel, RTSEL *pVal); DISDECL(int) DISFetchRegSegEx(PCPUMCTXCORE pCtx, uint32_t sel, RTSEL *pVal, CPUMSELREGHID **ppSelHidReg); DISDECL(int) DISWriteReg8(PCPUMCTXCORE pRegFrame, uint32_t reg8, uint8_t val8); DISDECL(int) DISWriteReg16(PCPUMCTXCORE pRegFrame, uint32_t reg32, uint16_t val16); DISDECL(int) DISWriteReg32(PCPUMCTXCORE pRegFrame, uint32_t reg32, uint32_t val32); DISDECL(int) DISWriteRegSeg(PCPUMCTXCORE pCtx, uint32_t sel, RTSEL val); __END_DECLS #endif