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[PATCH] X86-64: Correct CFA in _dl_runtime_resolve
- From: "H.J. Lu" <hongjiu dot lu at intel dot com>
- To: GNU C Library <libc-alpha at sourceware dot org>
- Date: Fri, 19 Aug 2016 13:30:22 -0700
- Subject: [PATCH] X86-64: Correct CFA in _dl_runtime_resolve
- Authentication-results: sourceware.org; auth=none
- Reply-to: "H.J. Lu" <hjl dot tools at gmail dot com>
When stack is re-aligned in _dl_runtime_resolve, there is no need to
adjust CFA when allocating register save area on stack.
Tested on x86-64. OK for master?
H.J.
---
* sysdeps/x86_64/dl-trampoline.h (_dl_runtime_resolve): Don't
adjust CFA when allocating register save area on re-aligned
stack.
---
sysdeps/x86_64/dl-trampoline.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/sysdeps/x86_64/dl-trampoline.h b/sysdeps/x86_64/dl-trampoline.h
index b90836a..8161f96 100644
--- a/sysdeps/x86_64/dl-trampoline.h
+++ b/sysdeps/x86_64/dl-trampoline.h
@@ -69,7 +69,9 @@ _dl_runtime_resolve:
and $-VEC_SIZE, %RSP_LP
#endif
sub $REGISTER_SAVE_AREA, %RSP_LP
+#if !DL_RUNTIME_RESOLVE_REALIGN_STACK
cfi_adjust_cfa_offset(REGISTER_SAVE_AREA)
+#endif
# Preserve registers otherwise clobbered.
movq %rax, REGISTER_SAVE_RAX(%rsp)
movq %rcx, REGISTER_SAVE_RCX(%rsp)
--
2.7.4