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x86: fix comments on MOVcr, MOVdr, MOVrc, MOVrd

This commit is contained in:
Nguyen Anh Quynh 2014-04-25 13:44:31 +08:00
parent e93179b851
commit 1b4864ac46
1 changed files with 7 additions and 1 deletions
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8
arch/X86/X86DisassemblerDecoder.c
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@ -1312,14 +1312,20 @@ static int readModRM(struct InternalInstruction* insn)
// dbgprintf(insn, "readModRM()");
// already got ModRM byte?
if (insn->consumedModRM)
return 0;
if (consumeByte(insn, &insn->modRM))
return -1;
// mark that we already got ModRM
insn->consumedModRM = TRUE;
// save original ModRM for later reference
insn->orgModRM = insn->modRM;
// handle MOVcr, MOVdr, MOVrc, MOVrd by pretending they have MRM.mod = 0xC
// handle MOVcr, MOVdr, MOVrc, MOVrd by pretending they have MRM.mod = 3
if ((insn->firstByte == 0x0f && insn->opcodeType == TWOBYTE) &&
(insn->opcode >= 0x20 && insn->opcode <= 0x23 ))
insn->modRM |= 0xC0;