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| author | H.J. Lu <hjl.tools@gmail.com> | 2016-03-04 15:36:18 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2016-03-04 16:15:41 -0800 |
| commit | 16b23e03632623cd81a21fc5a24db546595addac (patch) | |
| tree | ccaaa129b0d8e1a0060809309be814ee7746e236 | |
| parent | 21683b5a7d9b8460e120e061f66a6ad84fa47e98 (diff) | |
| download | glibc-16b23e03632623cd81a21fc5a24db546595addac.tar.gz glibc-16b23e03632623cd81a21fc5a24db546595addac.tar.xz glibc-16b23e03632623cd81a21fc5a24db546595addac.zip | |
Replace PREINIT_FUNCTION@PLT with *%rax in call
Since we have loaded address of PREINIT_FUNCTION into %rax, we can avoid extra branch to PLT slot. [BZ #19745] * sysdeps/x86_64/crti.S (_init): Replace PREINIT_FUNCTION@PLT with *%rax in call.
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | sysdeps/x86_64/crti.S | 2 |
2 files changed, 7 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog index af555291a9..f5b8d1e552 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,6 +1,12 @@ 2016-03-04 H.J. Lu <hongjiu.lu@intel.com> [BZ #19745] + * sysdeps/x86_64/crti.S (_init): Replace PREINIT_FUNCTION@PLT + with *%rax in call. + +2016-03-04 H.J. Lu <hongjiu.lu@intel.com> + + [BZ #19745] * sysdeps/x86_64/start.S (_start): Replace __libc_start_main@PLT with *__libc_start_main@GOTPCREL(%rip) in call. diff --git a/sysdeps/x86_64/crti.S b/sysdeps/x86_64/crti.S index a34525974a..e9d86ed08a 100644 --- a/sysdeps/x86_64/crti.S +++ b/sysdeps/x86_64/crti.S @@ -66,7 +66,7 @@ _init: movq PREINIT_FUNCTION@GOTPCREL(%rip), %rax testq %rax, %rax je .Lno_weak_fn - call PREINIT_FUNCTION@PLT + call *%rax .Lno_weak_fn: #else call PREINIT_FUNCTION |