Ubuntu
eglibc package

  1. Bug #601030
  2. Comment #12

Comment 12 for bug 601030

Revision history for this message
Michael Hope (michaelh1) wrote :

eglibc-2.11.1/sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S is broken. It saves the value of 'pass' in ecx for later use but ecx is trashed by a syscall.

The syscall is used to bring in the signal stack so that the fortify code can print an error message if needed. The problem goes away with -U_FORTIFY_SOURCE as no such syscall is used.