mirror of https://github.com/x64dbg/zydis
365 lines
12 KiB
C
365 lines
12 KiB
C
/***************************************************************************************************
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Zyan Disassembler Library (Zydis)
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Original Author : Florian Bernd
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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***************************************************************************************************/
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/**
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* @file
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* @brief TODO
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*/
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#include <stdio.h>
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#include <inttypes.h>
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#include <string.h>
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#include <Zydis/Zydis.h>
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/* ============================================================================================== */
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/* Helper functions */
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/* ============================================================================================== */
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const char* ZydisFormatStatus(ZydisStatus status)
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{
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static const char* strings[] =
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{
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"SUCCESS",
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"INVALID_PARAMETER",
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"INVALID_OPERATION",
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"NO_MORE_DATA",
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"DECODING_ERROR",
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"INSTRUCTION_TOO_LONG",
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"BAD_REGISTER",
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"ILLEGAL_LOCK",
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"ILLEGAL_LEGACY_PFX",
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"ILLEGAL_REX",
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"INVALID_MAP",
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"MALFORMED_EVEX",
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"MALFORMED_MVEX",
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"INVALID_MASK",
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"IMPOSSIBLE_INSTRUCTION",
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"INSUFFICIENT_BUFFER_SIZE"
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};
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ZYDIS_ASSERT(status < ZYDIS_ARRAY_SIZE(strings));
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return strings[status];
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}
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/* ============================================================================================== */
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/* Print functions */
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/* ============================================================================================== */
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void printFlags(ZydisDecodedInstruction* instruction)
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{
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static const char* flagNames[] =
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{
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"CF",
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"PF",
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"AF",
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"ZF",
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"SF",
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"TF",
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"IF",
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"DF",
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"OF",
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"IOPL",
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"NT",
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"RF",
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"VM",
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"AC",
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"VIF",
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"VIP",
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"ID",
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"C0",
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"C1",
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"C2",
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"C3"
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};
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static const char* flagActions[] =
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{
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" ",
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"T",
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"M",
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"0",
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"1",
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"U"
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};
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printf("FLAGS:\n ACTIONS: ");
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uint8_t c = 0;
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for (ZydisCPUFlag i = 0; i < ZYDIS_ARRAY_SIZE(instruction->flags); ++i)
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{
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if (instruction->flags[i].action != ZYDIS_CPUFLAG_ACTION_NONE)
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{
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++c;
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printf("[%-4s: %s] ", flagNames[i], flagActions[instruction->flags[i].action]);
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}
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if (c == 8)
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{
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printf("\n ");
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}
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}
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puts(c ? "" : "none");
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ZydisCPUFlagMask flags, temp;
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ZydisGetCPUFlagsByAction(instruction, ZYDIS_CPUFLAG_ACTION_TESTED, &flags);
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printf(" READ: 0x%08"PRIX32"\n", flags);
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ZydisGetCPUFlagsByAction(instruction, ZYDIS_CPUFLAG_ACTION_MODIFIED, &flags);
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ZydisGetCPUFlagsByAction(instruction, ZYDIS_CPUFLAG_ACTION_SET_0, &temp);
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flags |= temp;
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ZydisGetCPUFlagsByAction(instruction, ZYDIS_CPUFLAG_ACTION_SET_1, &temp);
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flags |= temp;
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printf(" WRITTEN: 0x%08"PRIX32"\n", flags);
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ZydisGetCPUFlagsByAction(instruction, ZYDIS_CPUFLAG_ACTION_UNDEFINED, &flags);
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printf(" UNDEFINED: 0x%08"PRIX32"\n", flags);
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puts("");
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}
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void printOperands(ZydisDecodedInstruction* instruction)
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{
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puts("Operands:");
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fputs("## TYPE VISIBILITY ACTION ENCODING SIZE NELEM ELEMSZ", stdout);
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fputs(" ELEMTYPE VALUE\n", stdout);
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fputs("== ========= ========== ====== ============ ==== ===== ======", stdout);
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fputs(" ======== ===========================\n", stdout);
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uint8_t immId = 0;
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for (uint8_t i = 0; i < instruction->operandCount; ++i)
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{
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static const char* operandTypes[] =
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{
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"UNUSED",
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"REGISTER",
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"MEMORY",
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"POINTER",
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"IMMEDIATE"
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};
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static const char* operandVisibilities[] =
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{
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"INVALID",
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"EXPLICIT",
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"IMPLICIT",
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"HIDDEN"
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};
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static const char* operandActions[] =
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{
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"INV",
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"R",
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"W",
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"RW",
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"CR",
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"CW",
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"RCW",
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"CRW"
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};
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static const char* elementTypes[] =
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{
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"INVALID",
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"STRUCT",
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"UINT",
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"INT",
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"FLOAT16",
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"FLOAT32",
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"FLOAT64",
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"FLOAT80",
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"LONGBCD"
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};
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static const char* operandEncodings[] =
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{
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"NONE",
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"MODRM_REG",
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"MODRM_RM",
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"OPCODE",
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"NDSNDD",
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"IS4",
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"MASK",
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"DISP8",
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"DISP16",
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"DISP32",
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"DISP64",
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"DISP16_32_64",
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"DISP32_32_64",
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"DISP16_32_32",
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"UIMM8",
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"UIMM16",
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"UIMM32",
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"UIMM64",
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"UIMM16_32_64",
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"UIMM32_32_64",
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"UIMM16_32_32",
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"SIMM8",
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"SIMM16",
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"SIMM32",
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"SIMM64",
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"SIMM16_32_64",
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"SIMM32_32_64",
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"SIMM16_32_32",
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"JIMM8",
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"JIMM16",
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"JIMM32",
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"JIMM64",
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"JIMM16_32_64",
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"JIMM32_32_64",
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"JIMM16_32_32"
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};
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printf("%2d %9s %10s %6s %12s %5d %4d %6d %8s",
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i,
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operandTypes[instruction->operands[i].type],
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operandVisibilities[instruction->operands[i].visibility],
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operandActions[instruction->operands[i].action],
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operandEncodings[instruction->operands[i].encoding],
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instruction->operands[i].size,
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instruction->operands[i].elementCount,
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instruction->operands[i].elementSize,
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elementTypes[instruction->operands[i].elementType]);
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switch (instruction->operands[i].type)
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{
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case ZYDIS_OPERAND_TYPE_REGISTER:
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printf(" %27s", ZydisRegisterGetString(instruction->operands[i].reg));
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break;
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case ZYDIS_OPERAND_TYPE_MEMORY:
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printf(" SEG =%20s\n", ZydisRegisterGetString(instruction->operands[i].mem.segment));
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printf(" %84s =%20s\n",
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"BASE ", ZydisRegisterGetString(instruction->operands[i].mem.base));
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printf(" %84s =%20s\n",
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"INDEX", ZydisRegisterGetString(instruction->operands[i].mem.index));
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printf(" %84s =%20d\n", "SCALE", instruction->operands[i].mem.scale);
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printf(" %84s = 0x%016"PRIX64,
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"DISP ", instruction->operands[i].mem.disp.value);
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break;
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case ZYDIS_OPERAND_TYPE_POINTER:
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break;
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case ZYDIS_OPERAND_TYPE_IMMEDIATE:
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if (instruction->operands[i].imm.isSigned)
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{
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printf(" (%s %s %2d) 0x%016"PRIX64,
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instruction->operands[i].imm.isSigned ? "S" : "U",
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instruction->operands[i].imm.isRelative ? "R" : "_",
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instruction->raw.imm[immId].size,
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instruction->operands[i].imm.value.s);
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} else
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{
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printf(" SIGN =%20s\n", instruction->operands[i].imm.isSigned ? "Y" : "N");
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printf(" %84s =%20s\n",
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"REL ", instruction->operands[i].imm.isRelative ? "Y" : "N");
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printf(" %84s = %2d\n",
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"SIZE ", instruction->raw.imm[immId].size);
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printf(" %84s = 0x%016"PRIX64,
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"VALUE", instruction->operands[i].imm.value.u);
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}
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++immId;
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break;
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default:
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ZYDIS_UNREACHABLE;
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}
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puts("");
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}
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fputs("== ========= ========== ====== ============ ==== ===== ======", stdout);
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fputs(" ======== ===========================\n", stdout);
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}
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void printInstruction(ZydisDecodedInstruction* instruction)
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{
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ZydisFormatter formatter;
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ZydisFormatterInitEx(&formatter, ZYDIS_FORMATTER_STYLE_INTEL,
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ZYDIS_FMTFLAG_FORCE_SEGMENTS | ZYDIS_FMTFLAG_FORCE_OPERANDSIZE,
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ZYDIS_FORMATTER_ADDR_ABSOLUTE, ZYDIS_FORMATTER_DISP_DEFAULT, ZYDIS_FORMATTER_IMM_DEFAULT);
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char buffer[256];
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ZydisFormatterFormatInstruction(&formatter, instruction, &buffer[0], sizeof(buffer));
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printf("Mnemonic : %s\n", ZydisMnemonicGetString(instruction->mnemonic));
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printf("Disassembly: %s\n\n", &buffer[0]);
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printOperands(instruction);
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if (ZydisRegisterGetClass(
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instruction->operands[instruction->operandCount - 1].reg) == ZYDIS_REGCLASS_FLAGS)
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{
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puts("");
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printFlags(instruction);
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}
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}
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/* ============================================================================================== */
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/* Entry point */
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/* ============================================================================================== */
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#include <../src/SharedData.h>
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int main(int argc, char** argv)
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{
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printf("%"PRId64"\n", (uint64_t)sizeof(ZydisInstructionDefinitionDEFAULT));
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printf("%"PRId64"\n", (uint64_t)sizeof(ZydisInstructionDefinitionEVEX));
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printf("%"PRId64"\n", (uint64_t)sizeof(ZydisOperandDefinition));
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if (argc < 3)
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{
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fputs("Usage: ZydisInfo -[16|32|64] [hexbytes]\n", stderr);
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return ZYDIS_STATUS_INVALID_PARAMETER;
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}
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ZydisDecoder decoder;
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if (!strcmp(argv[1], "-16"))
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{
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ZydisDecoderInit(&decoder, ZYDIS_MACHINE_MODE_LONG_COMPAT_16, ZYDIS_ADDRESS_WIDTH_16);
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} else
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if (!strcmp(argv[1], "-32"))
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{
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ZydisDecoderInit(&decoder, ZYDIS_MACHINE_MODE_LONG_COMPAT_32, ZYDIS_ADDRESS_WIDTH_32);
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} else
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if (!strcmp(argv[1], "-64"))
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{
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ZydisDecoderInit(&decoder, ZYDIS_MACHINE_MODE_LONG_64, ZYDIS_ADDRESS_WIDTH_64);
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} else
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{
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fputs("Usage: ZydisInfo -[16|32|64] [hexbytes]\n", stderr);
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return ZYDIS_STATUS_INVALID_PARAMETER;
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}
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uint8_t data[ZYDIS_MAX_INSTRUCTION_LENGTH] =
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{
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0x48, 0xC1, 0xC0, 0x04//0x0F, 0x01, 0xC3//0x48, 0x00, 0xC0//0x48, 0x8B, 0x04, 0x05, 0x00, 0x00, 0x00, 0x00//0xC4, 0xE3, 0x89, 0x48, 0x8C, 0x98, 0x00, 0x01, 0x00, 0x00, 0x38//0x62, 0xF1, 0x6C, 0x5F, 0xC2, 0x54, 0x98, 0x40, 0x0F
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};
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ZydisDecodedInstruction instruction;
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ZydisStatus status =
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ZydisDecoderDecodeBuffer(&decoder, &data, ZYDIS_MAX_INSTRUCTION_LENGTH, 0, &instruction);
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if (!ZYDIS_SUCCESS(status))
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{
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if (status >= ZYDIS_STATUS_USER)
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{
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fprintf(stderr,
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"Could not decode instruction: User defined status code 0x%"PRIx32, status);
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} else
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{
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fprintf(stderr, "Could not decode instruction: %s", ZydisFormatStatus(status));
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}
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return status;
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}
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printInstruction(&instruction);
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getchar();
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return ZYDIS_STATUS_SUCCESS;
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}
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/* ============================================================================================== */
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