[Bug binutils/14355] New: crash in OP_VEX

[H.J. Lu]

On Tue, Jul 17, 2012 at 7:48 AM, nick clifton <nickc@redhat.com> wrote:
> Hi H.J.
>
> Would you mind taking a look at this x86 bug report:
>
>> http://sourceware.org/bugzilla/show_bug.cgi?id=14355
>
>
> A simplistic fix appears to be this:
>
> Index: opcodes/i386-dis.c
> ===================================================================
> RCS file: /cvs/src/src/opcodes/i386-dis.c,v
> retrieving revision 1.269
> diff -u -3 -p -r1.269 i386-dis.c
> --- opcodes/i386-dis.c  16 Jul 2012 12:58:29 -0000      1.269
> +++ opcodes/i386-dis.c  17 Jul 2012 15:52:06 -0000
> @@ -14661,6 +14661,7 @@ OP_VEX (int bytemode, int sizeflag ATTRI
>         case vex256_mode:
>           names = names_ymm;
>           break;
> +       case vex128_mode:
>         case vex_vsib_q_w_dq_mode:
>           names = vex.w ? names_ymm : names_xmm;
>           break;
>
> But I am not sure if that is the correct thing to do.
>

This is the wrong fix. The bug is in XOP implementation.
Someone from AMD should take a look.

-- 
H.J.