[LLVMbugs] [Bug 16961] New: [x86 disassembler] fs segment override ignored on mov

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Wed Aug 21 15:49:00 PDT 2013


http://llvm.org/bugs/show_bug.cgi?id=16961

            Bug ID: 16961
           Summary: [x86 disassembler] fs segment override ignored on mov
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: david.majnemer at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

The first byte, 0x64, is the segment override.

echo "0x64 0xa1 0x08 0x00 0x00 0x00" | ~/llvm/build/bin/llvm-mc --disassemble
-triple=i386-apple-darwin9

        .section        __TEXT,__text,regular,pure_instructions
        movl    8, %eax

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