105 lines
4.4 KiB
C
105 lines
4.4 KiB
C
/***************************************************************************************************
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Zyan Disassembler Library (Zydis)
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Original Author : Joel Hoener
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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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#include <Zydis/Disassembler.h>
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#include <Zycore/LibC.h>
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/* ============================================================================================== */
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/* Internal helpers */
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/* ============================================================================================== */
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static ZyanStatus ZydisDisassemble(ZydisMachineMode machine_mode,
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ZyanU64 runtime_address, const void* buffer, ZyanUSize length,
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ZydisDisassembledInstruction *instruction, ZydisFormatterStyle style)
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{
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if (!buffer || !instruction)
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{
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return ZYAN_STATUS_INVALID_ARGUMENT;
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}
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*instruction = (ZydisDisassembledInstruction)
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{
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.runtime_address = runtime_address
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};
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// Derive the stack width from the address width.
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ZydisStackWidth stack_width;
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switch (machine_mode)
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{
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case ZYDIS_MACHINE_MODE_LONG_64:
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stack_width = ZYDIS_STACK_WIDTH_64;
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break;
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case ZYDIS_MACHINE_MODE_LONG_COMPAT_32:
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case ZYDIS_MACHINE_MODE_LEGACY_32:
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stack_width = ZYDIS_STACK_WIDTH_32;
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break;
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case ZYDIS_MACHINE_MODE_LONG_COMPAT_16:
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case ZYDIS_MACHINE_MODE_LEGACY_16:
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case ZYDIS_MACHINE_MODE_REAL_16:
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stack_width = ZYDIS_STACK_WIDTH_16;
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break;
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default:
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return ZYAN_STATUS_INVALID_ARGUMENT;
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}
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ZydisDecoder decoder;
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ZYAN_CHECK(ZydisDecoderInit(&decoder, machine_mode, stack_width));
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ZydisDecoderContext ctx;
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ZYAN_CHECK(ZydisDecoderDecodeInstruction(&decoder, &ctx, buffer, length, &instruction->info));
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ZYAN_CHECK(ZydisDecoderDecodeOperands(&decoder, &ctx, &instruction->info,
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instruction->operands, instruction->info.operand_count));
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ZydisFormatter formatter;
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ZYAN_CHECK(ZydisFormatterInit(&formatter, style));
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ZYAN_CHECK(ZydisFormatterFormatInstruction(&formatter, &instruction->info,
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instruction->operands, instruction->info.operand_count_visible, instruction->text,
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sizeof(instruction->text), runtime_address, ZYAN_NULL));
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return ZYAN_STATUS_SUCCESS;
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}
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/* ============================================================================================== */
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/* Public functions */
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/* ============================================================================================== */
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ZyanStatus ZydisDisassembleIntel(ZydisMachineMode machine_mode,
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ZyanU64 runtime_address, const void* buffer, ZyanUSize length,
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ZydisDisassembledInstruction *instruction)
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{
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return ZydisDisassemble(machine_mode, runtime_address, buffer, length, instruction,
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ZYDIS_FORMATTER_STYLE_INTEL);
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}
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ZyanStatus ZydisDisassembleATT(ZydisMachineMode machine_mode,
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ZyanU64 runtime_address, const void* buffer, ZyanUSize length,
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ZydisDisassembledInstruction *instruction)
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{
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return ZydisDisassemble(machine_mode, runtime_address, buffer, length, instruction,
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ZYDIS_FORMATTER_STYLE_ATT);
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}
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/* ============================================================================================== */
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