http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49503
H.J. Lu <hjl.tools at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |WAITING Last reconfirmed| |2011.06.22 16:48:48 Ever Confirmed|0 |1 --- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> 2011-06-22 16:48:48 UTC --- (In reply to comment #0) > > As _L_mutex_lock is a function, GCC generates a prologue and epilogue for it - > in prologue stack alignment is performed (according to ABI64, stack should be > aligned to 128-bit). I didn't see any prologue and epilogue for _L_mutex_lock. Do you have a run-time testcase to show the problem?