https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66303
stli at linux dot vnet.ibm.com <stli at linux dot vnet.ibm.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |stli at linux dot vnet.ibm.com --- Comment #11 from stli at linux dot vnet.ibm.com <stli at linux dot vnet.ibm.com> --- I have created a bug in glibc https://sourceware.org/bugzilla/show_bug.cgi?id=18508 and posted a patch (https://www.sourceware.org/ml/libc-alpha/2015-06/msg00324.html) which omits the cfi_startproc/cfi_endproc directives for __makecontext_ret. Thus backtrace do not find any information about __makecontext_ret in .eh_frame and stops backtrace like it is done with _start and thread_start functions.