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Fix use of uninitialized value for some instructions

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Caught by Valgrind:

    Conditional jump or move depends on uninitialised value(s)
       at 0xD5BB6F: readModRM (X86DisassemblerDecoder.c:1528)
       by 0xD5BF02: getIDWithAttrMask (X86DisassemblerDecoder.c:1101)
       by 0xD5CC5E: getID (X86DisassemblerDecoder.c:1249)
       by 0xD5CC5E: decodeInstruction (X86DisassemblerDecoder.c:2335)
       by 0xD52009: X86_getInstruction (X86Disassembler.c:822)
       by 0xD51781: cs_disasm (cs.c:503)
This commit is contained in:
Ole André Vadla Ravnås 2016-09-23 20:19:16 +02:00 committed by Nguyen Anh Quynh
parent 9b5f404d75
commit d3155db362
1 changed files with 1 additions and 0 deletions
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arch/X86/X86DisassemblerDecoder.c
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@ -920,6 +920,7 @@ static int readOpcode(struct InternalInstruction *insn)
// printf(">>> readOpcode() = %x\n", insn->readerCursor);
insn->opcodeType = ONEBYTE;
insn->firstByte = 0x00;
if (insn->vectorExtensionType == TYPE_EVEX) {
switch (mmFromEVEX2of4(insn->vectorExtensionPrefix[1])) {