zydis/include/Zydis/Encoder.h

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/***************************************************************************************************
Zyan Disassembler Library (Zydis)
Original Author : Joel H<EFBFBD>ner
* 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.
***************************************************************************************************/
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/**
* @file
* @brief Functions for (re-)encoding instructions.
*/
#ifndef ZYDIS_ENCODER_H
#define ZYDIS_ENCODER_H
#include <Zydis/Defines.h>
#include <Zydis/Status.h>
#include <Zydis/Register.h>
#include <Zydis/Mnemonic.h>
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#include <Zydis/SharedTypes.h>
#ifdef ZYDIS_ENABLE_FEATURE_DECODER
# include <Zydis/DecoderTypes.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
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/* ============================================================================================== */
/* Constants */
/* ============================================================================================== */
/**
* @brief Defines a mask of attributes users may excplicitly ask for.
*/
#define ZYDIS_USER_ENCODABLE_ATTRIB_MASK ( \
ZYDIS_ATTRIB_HAS_LOCK | \
ZYDIS_ATTRIB_HAS_REP | \
ZYDIS_ATTRIB_HAS_REPE | \
ZYDIS_ATTRIB_HAS_REPNE | \
ZYDIS_ATTRIB_HAS_BOUND | \
ZYDIS_ATTRIB_HAS_XACQUIRE | \
ZYDIS_ATTRIB_HAS_XRELEASE | \
ZYDIS_ATTRIB_HAS_BRANCH_TAKEN | \
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ZYDIS_ATTRIB_HAS_BRANCH_NOT_TAKEN \
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)
/* ============================================================================================== */
/* Structs */
/* ============================================================================================== */
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#define ZYDIS_ENCODER_MAX_OPERANDS (5)
typedef struct ZydisEncoderOperand_
{
ZydisOperandType type;
ZydisRegister reg;
struct
{
ZydisRegister segment;
ZydisRegister base;
ZydisRegister index;
uint8_t scale;
uint8_t dispSize;
int64_t disp;
} mem;
struct
{
uint16_t segment;
uint32_t offset;
} ptr;
union
{
uint64_t u;
int64_t s;
} imm;
} ZydisEncoderOperand;
typedef struct ZydisEncoderRequest_
{
ZydisMachineMode machineMode;
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ZydisMnemonic mnemonic;
ZydisInstructionAttributes attributes;
ZydisInstructionEncoding encoding;
uint8_t operandCount;
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ZydisEncoderOperand operands[ZYDIS_ENCODER_MAX_OPERANDS];
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struct
{
ZydisVectorLength vectorLength;
struct
{
ZydisMaskMode mode;
ZydisRegister reg;
} mask;
} avx;
// TODO: mvex stuff
} ZydisEncoderRequest;
/* ============================================================================================== */
/* Exported functions */
/* ============================================================================================== */
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#ifdef ZYDIS_ENABLE_FEATURE_DECODER
ZYDIS_EXPORT ZydisStatus ZydisEncoderDecodedInstructionToRequest(
const ZydisDecodedInstruction* in, ZydisEncoderRequest* out);
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#endif
/**
* @brief Encodes the given instruction request to byte-code.
*
* @param buffer A pointer to the output buffer.
* @param bufferLen The length of the output buffer.
* @param request A pointer to the @c ZydisEncoderRequest encode.
*
* @return A zydis status code.
*/
ZYDIS_EXPORT ZydisStatus ZydisEncoderEncodeInstruction(void* buffer, size_t* bufferLen,
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const ZydisEncoderRequest* request);
/* ============================================================================================== */
#ifdef __cplusplus
}
#endif
#endif /* ZYDIS_ENCODER_H */