I am running into this issue as well on a 12.04 domU with a AMD Opteron 6272 based box.
[14553.237586] apport[18522] trap invalid opcode ip:7f1d632625fc sp:7ffff8701390 error:0 in libm-2.15.so[7f1d63220000+f9000] Debugging info (gdb) exec-file python-dbg (gdb) run Starting program: /usr/bin/python-dbg [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Python 2.7.3 (default, Apr 20 2012, 22:01:19) [GCC 4.6.3] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> print test Program received signal SIGILL, Illegal instruction. __ieee754_exp_fma4 (x=-0.5) at ../sysdeps/ieee754/dbl-64/e_exp.c:63 63 ../sysdeps/ieee754/dbl-64/e_exp.c: No such file or directory. (gdb) bt #0 __ieee754_exp_fma4 (x=-0.5) at ../sysdeps/ieee754/dbl-64/e_exp.c:63 #1 0x000000000058509f in ?? () #2 0x00000000009bde80 in ?? () #3 0x0000000100c52a10 in ?? () #4 0x0000000000417380 in ?? () #5 0x00000000009d2970 in ?? () #6 0x0000000000000000 in ?? () (gdb) info address __ieee754_exp_fma4 Symbol "__ieee754_exp_fma4" is a function at address 0x7ffff6cc35f0. (gdb) disassemble 0x7ffff6cc35f0,+30 Dump of assembler code from 0x7ffff6cc35f0 to 0x7ffff6cc360e: 0x00007ffff6cc35f0 <__ieee754_exp_fma4+0>: push %rbp 0x00007ffff6cc35f1 <__ieee754_exp_fma4+1>: mov %rsp,%rbp 0x00007ffff6cc35f4 <__ieee754_exp_fma4+4>: and $0xffffffffffffffe0,%rsp 0x00007ffff6cc35f8 <__ieee754_exp_fma4+8>: add $0x10,%rsp => 0x00007ffff6cc35fc <__ieee754_exp_fma4+12>: vmovsd %xmm0,-0x20(%rsp) 0x00007ffff6cc3602 <__ieee754_exp_fma4+18>: mov -0x20(%rsp),%rax 0x00007ffff6cc3607 <__ieee754_exp_fma4+23>: mov %rax,%rcx 0x00007ffff6cc360a <__ieee754_exp_fma4+26>: shr $0x20,%rcx vmovsd is an avx instruction, but avx isn't supported according to cpu flags. # grep flags /proc/cpuinfo | head -1 flags : fpu de tsc msr pae cx8 cmov pat clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm rep_good nopl aperfmperf pni pclmulqdq ssse3 cx16 sse4_1 sse4_2 popcnt aes hypervisor lahf_lm cmp_legacy extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch xop fma4 perfctr_core arat cpb perhaps eglibc is assuming if fma4 is supported, avx must be too. thanks jim -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/956051 Title: libc6 crash while running 'xm' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/eglibc/+bug/956051/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
