diff options
Diffstat (limited to 'llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.cpp b/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.cpp index 6884f2a..e781c98 100644 --- a/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.cpp +++ b/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.cpp @@ -1723,6 +1723,10 @@ static int readOperands(struct InternalInstruction* insn) { if (readModRM(insn)) return -1; + // Reject if SIB wasn't used. + if (insn->eaBase != EA_BASE_sib && insn->eaBase != EA_BASE_sib64) + return -1; + // If sibIndex was set to SIB_INDEX_NONE, index offset is 4. if (insn->sibIndex == SIB_INDEX_NONE) insn->sibIndex = (SIBIndex)4; |