From 979f79467407fcf2537b53a168a1a18f3b540fdd Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Sun, 12 Jul 2015 14:40:25 -0700 Subject: Align stack to 16 bytes when calling __gettimeofday Subtract stack by 24 bytes instead of 16 bytes so that stack is aligned to 16 bytes when calling __gettimeofday. [BZ #18661] * sysdeps/unix/sysv/linux/x86_64/lowlevellock.S (__lll_timedwait_tid): Align stack to 16 bytes when calling __gettimeofday. --- sysdeps/unix/sysv/linux/x86_64/lowlevellock.S | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S b/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S index 0935db5ba4..8e1a39dafb 100644 --- a/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S +++ b/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S @@ -394,8 +394,9 @@ __lll_timedwait_tid: movq %rdi, %r12 movq %rsi, %r13 - subq $16, %rsp - cfi_adjust_cfa_offset(16) + /* Align stack to 16 bytes when calling __gettimeofday. */ + subq $24, %rsp + cfi_adjust_cfa_offset(24) /* Get current time. */ 2: movq %rsp, %rdi @@ -441,8 +442,8 @@ __lll_timedwait_tid: jne 1f 4: xorl %eax, %eax -8: addq $16, %rsp - cfi_adjust_cfa_offset(-16) +8: addq $24, %rsp + cfi_adjust_cfa_offset(-24) popq %r13 cfi_adjust_cfa_offset(-8) cfi_restore(%r13) -- cgit 1.4.1