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Diffstat (limited to 'js/src/zydis/Zydis/Disassembler.c')
| -rw-r--r-- | js/src/zydis/Zydis/Disassembler.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/js/src/zydis/Zydis/Disassembler.c b/js/src/zydis/Zydis/Disassembler.c new file mode 100644 index 0000000000..c0e778b9d2 --- /dev/null +++ b/js/src/zydis/Zydis/Disassembler.c @@ -0,0 +1,105 @@ +/*************************************************************************************************** + + Zyan Disassembler Library (Zydis) + + Original Author : Joel Hoener + + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + +***************************************************************************************************/ + +#include "zydis/Zydis/Disassembler.h" +#include "zydis/Zycore/LibC.h" + +/* ============================================================================================== */ +/* Internal helpers */ +/* ============================================================================================== */ + +static ZyanStatus ZydisDisassemble(ZydisMachineMode machine_mode, + ZyanU64 runtime_address, const void* buffer, ZyanUSize length, + ZydisDisassembledInstruction *instruction, ZydisFormatterStyle style) +{ + if (!buffer || !instruction) + { + return ZYAN_STATUS_INVALID_ARGUMENT; + } + + *instruction = (ZydisDisassembledInstruction) + { + .runtime_address = runtime_address + }; + + // Derive the stack width from the address width. + ZydisStackWidth stack_width; + switch (machine_mode) + { + case ZYDIS_MACHINE_MODE_LONG_64: + stack_width = ZYDIS_STACK_WIDTH_64; + break; + case ZYDIS_MACHINE_MODE_LONG_COMPAT_32: + case ZYDIS_MACHINE_MODE_LEGACY_32: + stack_width = ZYDIS_STACK_WIDTH_32; + break; + case ZYDIS_MACHINE_MODE_LONG_COMPAT_16: + case ZYDIS_MACHINE_MODE_LEGACY_16: + case ZYDIS_MACHINE_MODE_REAL_16: + stack_width = ZYDIS_STACK_WIDTH_16; + break; + default: + return ZYAN_STATUS_INVALID_ARGUMENT; + } + + ZydisDecoder decoder; + ZYAN_CHECK(ZydisDecoderInit(&decoder, machine_mode, stack_width)); + + ZydisDecoderContext ctx; + ZYAN_CHECK(ZydisDecoderDecodeInstruction(&decoder, &ctx, buffer, length, &instruction->info)); + ZYAN_CHECK(ZydisDecoderDecodeOperands(&decoder, &ctx, &instruction->info, + instruction->operands, instruction->info.operand_count)); + + ZydisFormatter formatter; + ZYAN_CHECK(ZydisFormatterInit(&formatter, style)); + ZYAN_CHECK(ZydisFormatterFormatInstruction(&formatter, &instruction->info, + instruction->operands, instruction->info.operand_count_visible, instruction->text, + sizeof(instruction->text), runtime_address, ZYAN_NULL)); + + return ZYAN_STATUS_SUCCESS; +} + +/* ============================================================================================== */ +/* Public functions */ +/* ============================================================================================== */ + +ZyanStatus ZydisDisassembleIntel(ZydisMachineMode machine_mode, + ZyanU64 runtime_address, const void* buffer, ZyanUSize length, + ZydisDisassembledInstruction *instruction) +{ + return ZydisDisassemble(machine_mode, runtime_address, buffer, length, instruction, + ZYDIS_FORMATTER_STYLE_INTEL); +} + +ZyanStatus ZydisDisassembleATT(ZydisMachineMode machine_mode, + ZyanU64 runtime_address, const void* buffer, ZyanUSize length, + ZydisDisassembledInstruction *instruction) +{ + return ZydisDisassemble(machine_mode, runtime_address, buffer, length, instruction, + ZYDIS_FORMATTER_STYLE_ATT); +} + +/* ============================================================================================== */ |