x64dbg
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zydis
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Minor bugfixes and cosmetical changes

This commit is contained in:
flobernd 2017-04-12 21:00:46 +02:00
parent ebf71d632f
commit 71a6d786d7
2 changed files with 31 additions and 34 deletions
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11
include/Zydis/Decoder.h
View File

@ -73,9 +73,8 @@ enum ZydisDecodeGranularities
* *
* @return A zydis status code. * @return A zydis status code.
*/ */
ZYDIS_EXPORT ZydisStatus ZydisDecode(ZydisOperatingMode operatingMode, ZYDIS_EXPORT ZydisStatus ZydisDecode(ZydisOperatingMode operatingMode, const void* buffer,
const void* buffer, size_t bufferLen, uint64_t instructionPointer, size_t bufferLen, uint64_t instructionPointer, ZydisInstructionInfo* info);
ZydisInstructionInfo* info);
/** /**
* @brief Decodes the instruction in the given input @c buffer. * @brief Decodes the instruction in the given input @c buffer.
@ -90,9 +89,9 @@ ZYDIS_EXPORT ZydisStatus ZydisDecode(ZydisOperatingMode operatingMode,
* *
* @return A zydis status code. * @return A zydis status code.
*/ */
ZYDIS_EXPORT ZydisStatus ZydisDecodeEx(ZydisOperatingMode operatingMode, ZYDIS_EXPORT ZydisStatus ZydisDecodeEx(ZydisOperatingMode operatingMode, const void* buffer,
const void* buffer, size_t bufferLen, uint64_t instructionPointer, size_t bufferLen, uint64_t instructionPointer, ZydisDecodeGranularity granularity,
ZydisDecodeGranularity granularity, ZydisInstructionInfo* info); ZydisInstructionInfo* info);
/* ============================================================================================== */ /* ============================================================================================== */

50
src/Decoder.c
View File

@ -1575,8 +1575,8 @@ static ZydisStatus ZydisDecodeOperand(ZydisDecoderContext* ctx, ZydisInstruction
* *
* @return A zydis status code. * @return A zydis status code.
*/ */
static ZydisStatus ZydisDecodeOperands(ZydisDecoderContext* ctx, static ZydisStatus ZydisDecodeOperands(ZydisDecoderContext* ctx, ZydisInstructionInfo* info,
ZydisInstructionInfo* info, const ZydisOperandDefinition* operands, uint8_t operandCount) const ZydisOperandDefinition* operands, uint8_t operandCount)
{ {
ZYDIS_ASSERT(ctx); ZYDIS_ASSERT(ctx);
ZYDIS_ASSERT(info); ZYDIS_ASSERT(info);
@ -1663,8 +1663,7 @@ static ZydisStatus ZydisDecodeOperands(ZydisDecoderContext* ctx,
* @param ctx A pointer to the @c ZydisDecoderContext instance. * @param ctx A pointer to the @c ZydisDecoderContext instance.
* @param info A pointer to the @c ZydisInstructionInfo struct. * @param info A pointer to the @c ZydisInstructionInfo struct.
*/ */
static void ZydisApplyInstructionDefinition(ZydisDecoderContext* ctx, static void ZydisApplyInstructionDefinition(ZydisDecoderContext* ctx, ZydisInstructionInfo* info)
ZydisInstructionInfo* info)
{ {
ZYDIS_ASSERT(info); ZYDIS_ASSERT(info);
ZYDIS_ASSERT(ctx->definition); ZYDIS_ASSERT(ctx->definition);
@ -1836,15 +1835,15 @@ static ZydisStatus ZydisNodeHandlerOpcode(ZydisDecoderContext* ctx,
case 0xC5: case 0xC5:
// Decode vex-prefix // Decode vex-prefix
info->encoding = ZYDIS_INSTRUCTION_ENCODING_VEX; info->encoding = ZYDIS_INSTRUCTION_ENCODING_VEX;
ZYDIS_CHECK( ZYDIS_CHECK(ZydisDecodeVEX(
ZydisDecodeVEX(ctx, info, info->opcode, prefixBytes[0], prefixBytes[1])); ctx, info, info->opcode, prefixBytes[0], prefixBytes[1]));
info->opcodeMap = info->details.vex.m_mmmm; info->opcodeMap = info->details.vex.m_mmmm;
break; break;
case 0x62: case 0x62:
// Decode evex-prefix // Decode evex-prefix
info->encoding = ZYDIS_INSTRUCTION_ENCODING_EVEX; info->encoding = ZYDIS_INSTRUCTION_ENCODING_EVEX;
ZYDIS_CHECK( ZYDIS_CHECK(ZydisDecodeEVEX(
ZydisDecodeEVEX(ctx, info, prefixBytes[0], prefixBytes[1], prefixBytes[2])); ctx, info, prefixBytes[0], prefixBytes[1], prefixBytes[2]));
info->opcodeMap = info->details.evex.mm; info->opcodeMap = info->details.evex.mm;
break; break;
default: default:
@ -1945,8 +1944,7 @@ static ZydisStatus ZydisNodeHandlerXop(ZydisInstructionInfo* info, uint16_t* ind
return ZYDIS_STATUS_SUCCESS; return ZYDIS_STATUS_SUCCESS;
} }
static ZydisStatus ZydisNodeHandlerMode(ZydisDecoderContext* ctx, static ZydisStatus ZydisNodeHandlerMode(ZydisDecoderContext* ctx, uint16_t* index)
uint16_t* index)
{ {
ZYDIS_ASSERT(ctx); ZYDIS_ASSERT(ctx);
ZYDIS_ASSERT(index); ZYDIS_ASSERT(index);
@ -1979,8 +1977,7 @@ static ZydisStatus ZydisNodeHandlerVex(ZydisInstructionInfo* info, uint16_t* ind
return ZYDIS_STATUS_SUCCESS; return ZYDIS_STATUS_SUCCESS;
} }
static ZydisStatus ZydisNodeHandlerMandatoryPrefix(ZydisDecoderContext* ctx, static ZydisStatus ZydisNodeHandlerMandatoryPrefix(ZydisDecoderContext* ctx, uint16_t* index)
uint16_t* index)
{ {
ZYDIS_ASSERT(index); ZYDIS_ASSERT(index);
@ -2120,8 +2117,8 @@ static ZydisStatus ZydisNodeHandlerAddressSize(ZydisDecoderContext* ctx,
return ZYDIS_STATUS_SUCCESS; return ZYDIS_STATUS_SUCCESS;
} }
static ZydisStatus ZydisNodeHandlerRexW(ZydisDecoderContext* ctx, static ZydisStatus ZydisNodeHandlerRexW(ZydisDecoderContext* ctx, ZydisInstructionInfo* info,
ZydisInstructionInfo* info, uint16_t* index) uint16_t* index)
{ {
ZYDIS_ASSERT(info); ZYDIS_ASSERT(info);
ZYDIS_ASSERT(index); ZYDIS_ASSERT(index);
@ -2147,8 +2144,8 @@ static ZydisStatus ZydisNodeHandlerRexW(ZydisDecoderContext* ctx,
return ZYDIS_STATUS_SUCCESS; return ZYDIS_STATUS_SUCCESS;
} }
static ZydisStatus ZydisNodeHandlerVexL(ZydisDecoderContext* ctx, static ZydisStatus ZydisNodeHandlerVexL(ZydisDecoderContext* ctx, ZydisInstructionInfo* info,
ZydisInstructionInfo* info, uint16_t* index) uint16_t* index)
{ {
ZYDIS_ASSERT(info); ZYDIS_ASSERT(info);
ZYDIS_ASSERT(index); ZYDIS_ASSERT(index);
@ -2202,8 +2199,7 @@ static ZydisStatus ZydisNodeHandlerEvexB(ZydisInstructionInfo* info, uint16_t* i
* *
* @return A zydis decoder status code. * @return A zydis decoder status code.
*/ */
static ZydisStatus ZydisDecodeOpcode(ZydisDecoderContext* ctx, static ZydisStatus ZydisDecodeOpcode(ZydisDecoderContext* ctx, ZydisInstructionInfo* info)
ZydisInstructionInfo* info)
{ {
ZYDIS_ASSERT(ctx); ZYDIS_ASSERT(ctx);
ZYDIS_ASSERT(info); ZYDIS_ASSERT(info);
@ -2350,18 +2346,16 @@ static ZydisStatus ZydisDecodeOpcode(ZydisDecoderContext* ctx,
/* Exported functions */ /* Exported functions */
/* ============================================================================================== */ /* ============================================================================================== */
ZydisStatus ZydisDecode(ZydisOperatingMode operatingMode, ZydisStatus ZydisDecode(ZydisOperatingMode operatingMode, const void* buffer, size_t bufferLen,
const void* buffer, size_t bufferLen, uint64_t instructionPointer, uint64_t instructionPointer, ZydisInstructionInfo* info)
ZydisInstructionInfo* info)
{ {
return ZydisDecodeEx( return ZydisDecodeEx(
operatingMode, buffer, bufferLen, instructionPointer, operatingMode, buffer, bufferLen, instructionPointer,
ZYDIS_DECODE_GRANULARITY_DEFAULT, info); ZYDIS_DECODE_GRANULARITY_DEFAULT, info);
} }
ZydisStatus ZydisDecodeEx(ZydisOperatingMode operatingMode, ZydisStatus ZydisDecodeEx(ZydisOperatingMode operatingMode, const void* buffer, size_t bufferLen,
const void* buffer, size_t bufferLen, uint64_t instructionPointer, uint64_t instructionPointer, ZydisDecodeGranularity granularity, ZydisInstructionInfo* info)
ZydisDecodeGranularity granularity, ZydisInstructionInfo* info)
{ {
if ((operatingMode != ZYDIS_DISASSEMBLER_MODE_16BIT) && if ((operatingMode != ZYDIS_DISASSEMBLER_MODE_16BIT) &&
(operatingMode != ZYDIS_DISASSEMBLER_MODE_32BIT) && (operatingMode != ZYDIS_DISASSEMBLER_MODE_32BIT) &&
@ -2376,8 +2370,13 @@ ZydisStatus ZydisDecodeEx(ZydisOperatingMode operatingMode,
} }
ZydisDecoderContext ctx; ZydisDecoderContext ctx;
memset(&ctx.internal, 0, sizeof(ctx.internal));
ctx.operatingMode = operatingMode; ctx.operatingMode = operatingMode;
ctx.granularity = granularity; ctx.granularity = granularity;
if (granularity == ZYDIS_DECODE_GRANULARITY_DEFAULT)
{
ctx.granularity = ZYDIS_DECODE_GRANULARITY_FULL;
}
ctx.input.buffer = (uint8_t*)buffer; ctx.input.buffer = (uint8_t*)buffer;
ctx.input.bufferLen = bufferLen; ctx.input.bufferLen = bufferLen;
ctx.hasUnusedPrefix66 = 0; ctx.hasUnusedPrefix66 = 0;
@ -2399,8 +2398,7 @@ ZydisStatus ZydisDecodeEx(ZydisOperatingMode operatingMode,
// Set AVX-512 info // Set AVX-512 info
if (info->encoding == ZYDIS_INSTRUCTION_ENCODING_EVEX) if (info->encoding == ZYDIS_INSTRUCTION_ENCODING_EVEX)
{ {
const ZydisInstructionDefinition* definition = const ZydisInstructionDefinition* definition = (ZydisInstructionDefinition*)ctx.definition;
(ZydisInstructionDefinition*)ctx.definition;
switch (definition->evexContext) switch (definition->evexContext)
{ {