/***************************************************************************************************
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);
}
/* ============================================================================================== */
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