Bug 306721

Summary: vex amd64->IR: unhandled instruction bytes: 0xC5 0xFB 0x10 0x5 0x1B 0xE8 0x1 0x0
Product: [Developer tools] valgrind Reporter: jeremy <gcc.hall>
Component: memcheckAssignee: Julian Seward <jseward>
Status: RESOLVED DUPLICATE    
Severity: normal CC: gcc.hall, tom
Priority: NOR    
Version: 3.7.0   
Target Milestone: ---   
Platform: Unlisted Binaries   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description jeremy 2012-09-13 08:22:20 UTC 
64 bit code compiled for "corei7-avx"   (a large printf call).
==1500== Memcheck, a memory error detector
==1500== Copyright (C) 2002-2011, and GNU GPL'd, by Julian Seward et al.
==1500== Using Valgrind-3.7.0 and LibVEX; rerun with -h for copyright info
==1500== Command: ./g_gdb -gc lim,quit
==1500==
vex amd64->IR: unhandled instruction bytes: 0xC5 0xFB 0x10 0x5 0x1B 0xE8 0x1 0x0
==1500== valgrind: Unrecognised instruction at address 0x40c1e5.

gcc --version
gcc (GCC) 4.7.0 20120507 (Red Hat 4.7.0-5)
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Comment 1 Tom Hughes 2012-09-13 09:22:03 UTC 
AVX instruction - an upgrade to 3.8.0 will probably fix it.

*** This bug has been marked as a duplicate of bug 273475 ***