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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-10-19 08:50:07 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-10-19 08:50:28 -0700 |
| commit | 37f4c94e1f0ae24b03d49839cd39c03076bd5c5b (patch) | |
| tree | 7dfe138516c776a450125e9f25a77c298cca9703 | |
| parent | 79c6f51428a9ec977e611e609a8be6aebcb00006 (diff) | |
| download | glibc-37f4c94e1f0ae24b03d49839cd39c03076bd5c5b.tar glibc-37f4c94e1f0ae24b03d49839cd39c03076bd5c5b.tar.gz glibc-37f4c94e1f0ae24b03d49839cd39c03076bd5c5b.tar.bz2 glibc-37f4c94e1f0ae24b03d49839cd39c03076bd5c5b.zip | |
X86-64: Correct CFA in _dl_runtime_resolve
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.
(cherry picked from commit 0ac8ee53e8efbfd6e1c37094b4653f5c2dad65b5)
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | sysdeps/x86_64/dl-trampoline.h | 2 |
2 files changed, 8 insertions, 0 deletions
@@ -1,3 +1,9 @@ +2017-10-19 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. + 2016-12-21 Joseph Myers <joseph@codesourcery.com> [BZ #20978] diff --git a/sysdeps/x86_64/dl-trampoline.h b/sysdeps/x86_64/dl-trampoline.h index 32ad3af202..d21c5a987a 100644 --- a/sysdeps/x86_64/dl-trampoline.h +++ b/sysdeps/x86_64/dl-trampoline.h @@ -169,7 +169,9 @@ _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) |