| 1 | /* $Id: Disasm.cpp 41669 2012-06-12 13:34:07Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBox disassembler - Disassemble and optionally format.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2012 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 |
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| 19 | /*******************************************************************************
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| 20 | * Header Files *
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| 21 | *******************************************************************************/
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| 22 | #define LOG_GROUP LOG_GROUP_DIS
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| 23 | #include <VBox/dis.h>
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| 24 | #include <VBox/disopcode.h>
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| 25 | #include <VBox/err.h>
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| 26 | #include <iprt/assert.h>
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| 27 | #include <iprt/string.h>
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| 28 | #include "DisasmInternal.h"
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| 29 | #include "DisasmTables.h"
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| 30 |
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| 31 |
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| 32 | /**
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| 33 | * Disassembles one instruction
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| 34 | *
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| 35 | * @returns VBox error code
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| 36 | * @param pCpu Pointer to cpu structure which have DISCPUSTATE::mode
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| 37 | * set correctly.
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| 38 | * @param pvInstr Pointer to the instruction to disassemble.
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| 39 | * @param pcbInstr Where to store the size of the instruction. NULL is
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| 40 | * allowed.
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| 41 | * @param pszOutput Storage for disassembled instruction
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| 42 | * @param cbOutput Size of the output buffer.
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| 43 | *
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| 44 | * @todo Define output callback.
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| 45 | */
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| 46 | DISDECL(int) DISInstrToStr(void const *pvInstr, DISCPUMODE enmCpuMode, PDISCPUSTATE pCpu, uint32_t *pcbInstr,
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| 47 | char *pszOutput, size_t cbOutput)
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| 48 | {
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| 49 | return DISInstrEx((uintptr_t)pvInstr, 0, enmCpuMode, NULL, NULL, OPTYPE_ALL,
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| 50 | pCpu, pcbInstr, pszOutput);
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| 51 | }
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| 52 |
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| 53 | /**
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| 54 | * Disassembles one instruction
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| 55 | *
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| 56 | * @returns VBox error code
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| 57 | * @param pCpu Pointer to cpu structure which have DISCPUSTATE::mode
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| 58 | * set correctly.
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| 59 | * @param uInstrAddr Pointer to the instruction to disassemble.
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| 60 | * @param offRealAddr Offset to add to instruction address to get the real
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| 61 | * virtual address.
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| 62 | * @param pcbInstr Where to store the size of the instruction. NULL is
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| 63 | * allowed.
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| 64 | * @param pszOutput Storage for disassembled instruction
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| 65 | *
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| 66 | * @todo Define output callback.
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| 67 | */
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| 68 | DISDECL(int) DISInstrWithOff(PDISCPUSTATE pCpu, RTUINTPTR uInstrAddr, RTUINTPTR offRealAddr,
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| 69 | uint32_t *pcbInstr, char *pszOutput)
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| 70 | {
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| 71 | return DISInstrEx(uInstrAddr, offRealAddr, pCpu->mode, pCpu->pfnReadBytes, pCpu->apvUserData[0], OPTYPE_ALL,
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| 72 | pCpu, pcbInstr, pszOutput);
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| 73 | }
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| 74 |
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| 75 | /**
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| 76 | * Disassembles one instruction with a byte fetcher caller.
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| 77 | *
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| 78 | * @returns VBox error code
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| 79 | * @param uInstrAddr Pointer to the structure to disassemble.
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| 80 | * @param enmCpuMode The CPU mode.
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| 81 | * @param pfnCallback The byte fetcher callback.
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| 82 | * @param pvUser The user argument (found in
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| 83 | * DISCPUSTATE::apvUserData[0]).
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| 84 | * @param pCpu Where to return the disassembled instruction.
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| 85 | * @param pcbInstr Where to store the size of the instruction. NULL is
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| 86 | * allowed.
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| 87 | * @param pszOutput Storage for disassembled instruction
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| 88 | *
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| 89 | * @todo Define output callback.
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| 90 | */
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| 91 | DISDECL(int) DISInstrWithReader(RTUINTPTR uInstrAddr, DISCPUMODE enmCpuMode, PFNDISREADBYTES pfnReadBytes, void *pvUser,
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| 92 | PDISCPUSTATE pCpu, uint32_t *pcbInstr, char *pszOutput)
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| 93 |
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| 94 | {
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| 95 | return DISInstrEx(uInstrAddr, 0, enmCpuMode, pfnReadBytes, pvUser, OPTYPE_ALL,
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| 96 | pCpu, pcbInstr, pszOutput);
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| 97 | }
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| 98 |
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| 99 | /**
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| 100 | * Disassembles one instruction; only fully disassembly an instruction if it matches the filter criteria
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| 101 | *
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| 102 | * @returns VBox error code
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| 103 | * @param pCpu Pointer to cpu structure which have DISCPUSTATE::mode
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| 104 | * set correctly.
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| 105 | * @param uInstrAddr Pointer to the structure to disassemble.
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| 106 | * @param u32EipOffset Offset to add to instruction address to get the real virtual address
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| 107 | * @param pcbInstr Where to store the size of the instruction. NULL is
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| 108 | * allowed.
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| 109 | * @param pszOutput Storage for disassembled instruction
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| 110 | * @param uFilter Instruction type filter.
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| 111 | *
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| 112 | * @todo Define output callback.
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| 113 | */
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| 114 | DISDECL(int) DISInstrEx(RTUINTPTR uInstrAddr, RTUINTPTR offRealAddr, DISCPUMODE enmCpuMode,
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| 115 | PFNDISREADBYTES pfnReadBytes, void *pvUser, uint32_t uFilter,
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| 116 | PDISCPUSTATE pCpu, uint32_t *pcbInstr, char *pszOutput)
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| 117 | {
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| 118 | int rc = DISCoreOneExEx(uInstrAddr, enmCpuMode, uFilter, pfnReadBytes, pvUser, pCpu, pcbInstr);
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| 119 | if (RT_SUCCESS(rc) && pszOutput)
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| 120 | {
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| 121 | size_t cbOutput = 128;
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| 122 | size_t cch;
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| 123 | #if 0
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| 124 | RTUINTPTR uRealAddr = uInstrAddr + offRealAddr;
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| 125 | if (pCpu->mode == CPUMODE_64BIT || uRealAddr > UINT32_MAX)
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| 126 | cch = RTStrPrintf(pszOutput, cbOutput, "%016RTptr: ", uRealAddr);
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| 127 | else
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| 128 | cch = RTStrPrintf(pszOutput, cbOutput, "%08RX32: ", (uint32_t)uRealAddr);
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| 129 | rc = DISFormatYasmEx(pCpu, pszOutput + cch, cbOutput - cch,
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| 130 | DIS_FMT_FLAGS_BYTES_LEFT | DIS_FMT_FLAGS_BYTES_BRACKETS | DIS_FMT_FLAGS_BYTES_SPACED
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| 131 | | DIS_FMT_FLAGS_RELATIVE_BRANCH,
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| 132 | NULL /*pfnGetSymbol*/, NULL /*pvUser*/);
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| 133 | #else
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| 134 | pCpu->uInstrAddr += offRealAddr;
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| 135 | rc = DISFormatYasmEx(pCpu, pszOutput, cbOutput,
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| 136 | DIS_FMT_FLAGS_BYTES_LEFT | DIS_FMT_FLAGS_BYTES_BRACKETS | DIS_FMT_FLAGS_BYTES_SPACED
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| 137 | | DIS_FMT_FLAGS_RELATIVE_BRANCH | DIS_FMT_FLAGS_ADDR_LEFT,
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| 138 | NULL /*pfnGetSymbol*/, NULL /*pvUser*/);
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| 139 | pCpu->uInstrAddr = uInstrAddr;
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| 140 | #endif
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| 141 | cch = strlen(pszOutput);
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| 142 | if (cch < cbOutput)
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| 143 | {
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| 144 | pszOutput[cch++] = '\n';
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| 145 | pszOutput[cch] = '\0';
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| 146 | }
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| 147 | }
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| 148 | return rc;
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| 149 | }
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| 150 |
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