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X86-64: Correct CFA in _dl_runtime_resolve

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When stack is re-aligned in _dl_runtime_resolve, there is no need to
adjust CFA when allocating register save area on stack.

	* sysdeps/x86_64/dl-trampoline.h (_dl_runtime_resolve): Don't
	adjust CFA when allocating register save area on re-aligned
	stack.
This commit is contained in:
H.J. Lu 2016-08-26 08:57:42 -07:00
parent 6e263a27c4
commit 0ac8ee53e8
2 changed files with 8 additions and 0 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2016-08-26 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/x86_64/dl-trampoline.h (_dl_runtime_resolve): Don't
adjust CFA when allocating register save area on re-aligned
stack.
2016-08-26 Florian Weimer <fweimer@redhat.com> 2016-08-26 Florian Weimer <fweimer@redhat.com>
* string/tst-cmp.c: New test. * string/tst-cmp.c: New test.

2
sysdeps/x86_64/dl-trampoline.h
View File

@ -69,7 +69,9 @@ _dl_runtime_resolve:
and $-VEC_SIZE, %RSP_LP and $-VEC_SIZE, %RSP_LP
#endif #endif
sub $REGISTER_SAVE_AREA, %RSP_LP sub $REGISTER_SAVE_AREA, %RSP_LP
#if !DL_RUNTIME_RESOLVE_REALIGN_STACK
cfi_adjust_cfa_offset(REGISTER_SAVE_AREA) cfi_adjust_cfa_offset(REGISTER_SAVE_AREA)
#endif
# Preserve registers otherwise clobbered. # Preserve registers otherwise clobbered.
movq %rax, REGISTER_SAVE_RAX(%rsp) movq %rax, REGISTER_SAVE_RAX(%rsp)
movq %rcx, REGISTER_SAVE_RCX(%rsp) movq %rcx, REGISTER_SAVE_RCX(%rsp)