[Webkit-unassigned] [Bug 117205] Update udis86 to a more recent version

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Jun 4 14:25:42 PDT 2013


--- Comment #9 from Filip Pizlo <fpizlo at apple.com>  2013-06-04 14:24:14 PST ---
(In reply to comment #8)
> (In reply to comment #7)
> > Do you know what kinds of improvements have been made?
> The improvements I can see (not including new instructions) are:
>   * Fixed printf warnings.
>   * Various fixes to instructions:
>       * Make mov (c7 /reg=0) sign-extend the immediate operand.
>       * Add missing mod == 3 check in decode.c:decode_operand OP_R case.
>       * Correct loopnz to loopne, setnb to setae
>       * Fix cmp 83 /reg=7 for imm sign extension
>       * remove modification of const string.
>       * etc.
>   * Most of the changes you needed to make in differences.txt are fixed upstream, so anyone who is familiar with udis86 won't be surprised by the version in WebKit.
> If you're not interested in this, I can try to just incorporate the one fix.

No no, I just wanted to make sure this made sense.  It seems like it does.  Let's wait for the bots before landing.  Have you run some spot tests on x86-32 and x86-64 to make sure that the output makes sense?  It might be good to post the disassembly of some representative code on both 32-bit and 64-bit just so that we can be sure that we don't land a lemon.

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