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zydis
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Fixed decoding of implicit "1" immediate (ROL, ROR, RCL, ...)

This commit is contained in:
flobernd 2017-06-20 22:44:37 +02:00
parent 5112e61fd8
commit d475231a63
4 changed files with 12 additions and 6 deletions
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1
include/Zydis/InstructionInfo.h
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@ -121,7 +121,6 @@ enum ZydisOperandEncodings
ZYDIS_OPERAND_ENCODING_DISP16_32_64,
ZYDIS_OPERAND_ENCODING_DISP32_32_64,
ZYDIS_OPERAND_ENCODING_DISP16_32_32,
ZYDIS_OPERAND_ENCODING_UIMM_CONST1,
ZYDIS_OPERAND_ENCODING_UIMM8,
ZYDIS_OPERAND_ENCODING_UIMM16,
ZYDIS_OPERAND_ENCODING_UIMM32,

1
include/Zydis/Internal/InstructionTable.h
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@ -175,6 +175,7 @@ enum ZydisSemanticOperandTypes
ZYDIS_SEMANTIC_OPTYPE_UNUSED,
ZYDIS_SEMANTIC_OPTYPE_IMPLICIT_REG,
ZYDIS_SEMANTIC_OPTYPE_IMPLICIT_MEM,
ZYDIS_SEMANTIC_OPTYPE_IMPLICIT_IMM1,
ZYDIS_SEMANTIC_OPTYPE_GPR8,
ZYDIS_SEMANTIC_OPTYPE_GPR16,
ZYDIS_SEMANTIC_OPTYPE_GPR32,

8
include/Zydis/Internal/OperandDefinitions.inc
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@ -5313,13 +5313,13 @@ const ZydisOperandDefinition operandDefinitions[] =
/*14BE*/ { ZYDIS_SEMANTIC_OPTYPE_MMX, ZYDIS_OPERAND_VISIBILITY_EXPLICIT, ZYDIS_OPERAND_ACTION_READWRITE, { 8, 8, 8 }, ZYDIS_IELEMENT_TYPE_UINT16, { .encoding = ZYDIS_OPERAND_ENCODING_MODRM_REG } },
/*14BF*/ { ZYDIS_SEMANTIC_OPTYPE_MMX, ZYDIS_OPERAND_VISIBILITY_EXPLICIT, ZYDIS_OPERAND_ACTION_READ, { 4, 4, 4 }, ZYDIS_IELEMENT_TYPE_UINT16, { .encoding = ZYDIS_OPERAND_ENCODING_MODRM_RM } },
/*14C0*/ { ZYDIS_SEMANTIC_OPTYPE_MEM, ZYDIS_OPERAND_VISIBILITY_EXPLICIT, ZYDIS_OPERAND_ACTION_READWRITE, { 1, 1, 1 }, ZYDIS_IELEMENT_TYPE_UINT8, { .encoding = ZYDIS_OPERAND_ENCODING_MODRM_RM } },
/*14C1*/ { ZYDIS_SEMANTIC_OPTYPE_IMM, ZYDIS_OPERAND_VISIBILITY_EXPLICIT, ZYDIS_OPERAND_ACTION_READ, { 1, 1, 1 }, ZYDIS_IELEMENT_TYPE_UINT8, { .encoding = ZYDIS_OPERAND_ENCODING_UIMM_CONST1 } },
/*14C1*/ { ZYDIS_SEMANTIC_OPTYPE_IMPLICIT_IMM1, ZYDIS_OPERAND_VISIBILITY_IMPLICIT, ZYDIS_OPERAND_ACTION_READ, { 1, 1, 1 }, ZYDIS_IELEMENT_TYPE_UINT8, { .encoding = ZYDIS_OPERAND_ENCODING_NONE } },
/*14C2*/ { ZYDIS_SEMANTIC_OPTYPE_GPR8, ZYDIS_OPERAND_VISIBILITY_EXPLICIT, ZYDIS_OPERAND_ACTION_READWRITE, { 0, 0, 0 }, ZYDIS_IELEMENT_TYPE_INVALID, { .encoding = ZYDIS_OPERAND_ENCODING_MODRM_RM } },
/*14C3*/ { ZYDIS_SEMANTIC_OPTYPE_IMM, ZYDIS_OPERAND_VISIBILITY_EXPLICIT, ZYDIS_OPERAND_ACTION_READ, { 1, 1, 1 }, ZYDIS_IELEMENT_TYPE_UINT8, { .encoding = ZYDIS_OPERAND_ENCODING_UIMM_CONST1 } },
/*14C3*/ { ZYDIS_SEMANTIC_OPTYPE_IMPLICIT_IMM1, ZYDIS_OPERAND_VISIBILITY_IMPLICIT, ZYDIS_OPERAND_ACTION_READ, { 1, 1, 1 }, ZYDIS_IELEMENT_TYPE_UINT8, { .encoding = ZYDIS_OPERAND_ENCODING_NONE } },
/*14C4*/ { ZYDIS_SEMANTIC_OPTYPE_MEM, ZYDIS_OPERAND_VISIBILITY_EXPLICIT, ZYDIS_OPERAND_ACTION_READWRITE, { 2, 4, 8 }, ZYDIS_IELEMENT_TYPE_INT, { .encoding = ZYDIS_OPERAND_ENCODING_MODRM_RM } },
/*14C5*/ { ZYDIS_SEMANTIC_OPTYPE_IMM, ZYDIS_OPERAND_VISIBILITY_EXPLICIT, ZYDIS_OPERAND_ACTION_READ, { 1, 1, 1 }, ZYDIS_IELEMENT_TYPE_UINT8, { .encoding = ZYDIS_OPERAND_ENCODING_UIMM_CONST1 } },
/*14C5*/ { ZYDIS_SEMANTIC_OPTYPE_IMPLICIT_IMM1, ZYDIS_OPERAND_VISIBILITY_IMPLICIT, ZYDIS_OPERAND_ACTION_READ, { 1, 1, 1 }, ZYDIS_IELEMENT_TYPE_UINT8, { .encoding = ZYDIS_OPERAND_ENCODING_NONE } },
/*14C6*/ { ZYDIS_SEMANTIC_OPTYPE_GPR16_32_64, ZYDIS_OPERAND_VISIBILITY_EXPLICIT, ZYDIS_OPERAND_ACTION_READWRITE, { 0, 0, 0 }, ZYDIS_IELEMENT_TYPE_INVALID, { .encoding = ZYDIS_OPERAND_ENCODING_MODRM_RM } },
/*14C7*/ { ZYDIS_SEMANTIC_OPTYPE_IMM, ZYDIS_OPERAND_VISIBILITY_EXPLICIT, ZYDIS_OPERAND_ACTION_READ, { 1, 1, 1 }, ZYDIS_IELEMENT_TYPE_UINT8, { .encoding = ZYDIS_OPERAND_ENCODING_UIMM_CONST1 } },
/*14C7*/ { ZYDIS_SEMANTIC_OPTYPE_IMPLICIT_IMM1, ZYDIS_OPERAND_VISIBILITY_IMPLICIT, ZYDIS_OPERAND_ACTION_READ, { 1, 1, 1 }, ZYDIS_IELEMENT_TYPE_UINT8, { .encoding = ZYDIS_OPERAND_ENCODING_NONE } },
/*14C8*/ { ZYDIS_SEMANTIC_OPTYPE_MEM, ZYDIS_OPERAND_VISIBILITY_EXPLICIT, ZYDIS_OPERAND_ACTION_READWRITE, { 1, 1, 1 }, ZYDIS_IELEMENT_TYPE_UINT8, { .encoding = ZYDIS_OPERAND_ENCODING_MODRM_RM } },
/*14C9*/ { ZYDIS_SEMANTIC_OPTYPE_IMPLICIT_REG, ZYDIS_OPERAND_VISIBILITY_IMPLICIT, ZYDIS_OPERAND_ACTION_READ, { 0, 0, 0 }, ZYDIS_IELEMENT_TYPE_INVALID, { .reg = { ZYDIS_IMPLREG_TYPE_STATIC, { .reg = ZYDIS_REGISTER_CL } } } },
/*14CA*/ { ZYDIS_SEMANTIC_OPTYPE_GPR8, ZYDIS_OPERAND_VISIBILITY_EXPLICIT, ZYDIS_OPERAND_ACTION_READWRITE, { 0, 0, 0 }, ZYDIS_IELEMENT_TYPE_INVALID, { .encoding = ZYDIS_OPERAND_ENCODING_MODRM_RM } },

8
src/Decoder.c
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@ -1464,6 +1464,13 @@ static ZydisStatus ZydisDecodeOperands(ZydisDecoderContext* context, ZydisInstru
case ZYDIS_SEMANTIC_OPTYPE_IMPLICIT_MEM:
ZydisDecodeOperandImplicitMemory(context, &info->operands[i], operand);
break;
case ZYDIS_SEMANTIC_OPTYPE_IMPLICIT_IMM1:
info->operands[i].type = ZYDIS_OPERAND_TYPE_IMMEDIATE;
info->operands[i].size = 8;
info->operands[i].imm.value.ubyte = 1;
info->operands[i].imm.isSigned = ZYDIS_FALSE;
info->operands[i].imm.isRelative = ZYDIS_FALSE;
break;
default:
break;
}
@ -1760,7 +1767,6 @@ static ZydisStatus ZydisDecodeOperands(ZydisDecoderContext* context, ZydisInstru
case ZYDIS_SEMANTIC_OPTYPE_IMM:
ZYDIS_ASSERT((immId == 0) || (immId == 1));
info->operands[i].type = ZYDIS_OPERAND_TYPE_IMMEDIATE;
//ZYDIS_ASSERT(operand->size[context->eoszIndex]);
info->operands[i].size = operand->size[context->eoszIndex] * 8;
info->operands[i].imm.value.uqword = info->details.imm[immId].value.uqword;
info->operands[i].imm.isSigned = info->details.imm[immId].isSigned;