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| author | Kevin Enderby <enderby@apple.com> | 2012-03-09 17:52:49 +0000 |
|---|---|---|
| committer | Kevin Enderby <enderby@apple.com> | 2012-03-09 17:52:49 +0000 |
| commit | 014e1cde5f6d245f528d6d2e34a28a125bb654b3 (patch) | |
| tree | 887e450107b930f8eef01c17a1155c0e6222bf7f /llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c | |
| parent | 3618cb7b6b7ff933a962583d7acde5006fa2db54 (diff) | |
| download | bcm5719-llvm-014e1cde5f6d245f528d6d2e34a28a125bb654b3.tar.gz bcm5719-llvm-014e1cde5f6d245f528d6d2e34a28a125bb654b3.zip | |
Fix the x86 disassembler to at least print the lock prefix if it is the first
prefix. Added a FIXME to remind us this still does not work when it is not the
first prefix.
llvm-svn: 152414
Diffstat (limited to 'llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c')
| -rw-r--r-- | llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c b/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c index b0e66f00c71..6f7e8f23466 100644 --- a/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c +++ b/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c @@ -312,6 +312,13 @@ static int readPrefixes(struct InternalInstruction* insn) { if (consumeByte(insn, &byte)) return -1; + + // If the the first byte is a LOCK prefix break and let it be disassembled + // as a lock "instruction", by creating an <MCInst #xxxx LOCK_PREFIX>. + // FIXME there is currently no way to get the disassembler to print the + // lock prefix if it is not the first byte. + if (insn->readerCursor - 1 == insn->startLocation && byte == 0xf0) + break; switch (byte) { case 0xf0: /* LOCK */ |
