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| author | H.J. Lu <hjl.tools@gmail.com> | 2016-03-01 16:58:07 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2016-03-01 16:58:07 -0800 |
| commit | ec215346b92fdaef5d8042b5545e16beb7ccc7d1 (patch) | |
| tree | 97f47ce77b7a57cf9727a7e3bad1221211ed4477 | |
| parent | 521266a819be5b33b224f2e8358175c30c79f1c2 (diff) | |
| download | glibc-ec215346b92fdaef5d8042b5545e16beb7ccc7d1.tar.gz | |
Call x86-64 __mcount_internal/__sigjmp_save directly
Since __mcount_internal and __sigjmp_save are internal to x86-64 libc.so:
3532: 0000000000104530 289 FUNC LOCAL DEFAULT 13 __mcount_internal
3391: 0000000000034170 38 FUNC LOCAL DEFAULT 13 __sigjmp_save
they can be called directly without PLT.
* sysdeps/x86_64/_mcount.S (C_LABEL(_mcount)): Call
__mcount_internal directly.
(C_LABEL(__fentry__)): Likewise.
* sysdeps/x86_64/setjmp.S __sigsetjmp): Call __sigjmp_save
directly.
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | sysdeps/x86_64/_mcount.S | 8 | ||||
| -rw-r--r-- | sysdeps/x86_64/setjmp.S | 4 |
3 files changed, 8 insertions, 12 deletions
@@ -1,5 +1,13 @@ 2016-03-01 H.J. Lu <hongjiu.lu@intel.com> + * sysdeps/x86_64/_mcount.S (C_LABEL(_mcount)): Call + __mcount_internal directly. + (C_LABEL(__fentry__)): Likewise. + * sysdeps/x86_64/setjmp.S __sigsetjmp): Call __sigjmp_save + directly. + +2016-03-01 H.J. Lu <hongjiu.lu@intel.com> + * sysdeps/unix/sysv/linux/x86_64/__start_context.S (__start_context): Call __setcontext directly. diff --git a/sysdeps/x86_64/_mcount.S b/sysdeps/x86_64/_mcount.S index 5d7edd2a29..ba13643464 100644 --- a/sysdeps/x86_64/_mcount.S +++ b/sysdeps/x86_64/_mcount.S @@ -43,11 +43,7 @@ C_LABEL(_mcount) movq 56(%rsp),%rsi /* Get frompc via the frame pointer. */ movq 8(%rbp),%rdi -#ifdef PIC - call C_SYMBOL_NAME(__mcount_internal)@PLT -#else call C_SYMBOL_NAME(__mcount_internal) -#endif /* Pop the saved registers. Please note that `mcount' has no return value. */ movq 48(%rsp),%r9 @@ -84,11 +80,7 @@ C_LABEL(__fentry__) movq 64(%rsp),%rsi /* caller is the return address above it */ movq 72(%rsp),%rdi -#ifdef PIC - call C_SYMBOL_NAME(__mcount_internal)@PLT -#else call C_SYMBOL_NAME(__mcount_internal) -#endif /* Pop the saved registers. Please note that `__fentry__' has no return value. */ movq 48(%rsp),%r9 diff --git a/sysdeps/x86_64/setjmp.S b/sysdeps/x86_64/setjmp.S index 3e93967c2f..e37c22378b 100644 --- a/sysdeps/x86_64/setjmp.S +++ b/sysdeps/x86_64/setjmp.S @@ -60,11 +60,7 @@ ENTRY (__sigsetjmp) retq #else /* Make a tail call to __sigjmp_save; it takes the same args. */ -# ifdef PIC - jmp C_SYMBOL_NAME (__sigjmp_save)@PLT -# else jmp __sigjmp_save -# endif #endif END (__sigsetjmp) hidden_def (__sigsetjmp) |