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Fix REX2 JMPABS target detection #377

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Fix REX2 JMPABS target detection #377

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4 changes: 2 additions & 2 deletions src/disasm.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -975,9 +975,9 @@ PBYTE CDetourDis::CopyRex2(REFCOPYENTRY pEntry, PBYTE pbDst, PBYTE pbSrc)
pbOut = (this->*pEntry2->pfCopy)(pEntry2, pbDst + 2, pbSrc + 2);
}

// JMPABS: REX2 with payload=0x00 (M=0, W=0, all ext bits 0) and opcode A1.
// JMPABS: REX2 with M=0, W=0, and opcode A1. Other payload bits are ignored.
// This is an absolute 64-bit jump whose target is the 8-byte immediate.
if (payload == 0x00 && pbSrc[2] == 0xA1) {
if ((payload & 0x88) == 0x00 && pbSrc[2] == 0xA1) {
*m_ppbTarget = *(UNALIGNED PBYTE*)&pbSrc[3];
}

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