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| author | Ulrich Drepper <drepper@redhat.com> | 2009-06-01 11:49:05 -0700 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2009-06-01 11:49:05 -0700 |
| commit | fd96f062085be71f4e2c07c98a3002bd55793b6e (patch) | |
| tree | 9dd63d31fbd1b922fa612a591b4124b27b417c83 | |
| parent | 21e66bc528edcbe18d434eb33a601e0f796904c9 (diff) | |
| download | glibc-fd96f062085be71f4e2c07c98a3002bd55793b6e.zip glibc-fd96f062085be71f4e2c07c98a3002bd55793b6e.tar.gz glibc-fd96f062085be71f4e2c07c98a3002bd55793b6e.tar.bz2 | |
Small optimization of STT_GNU_IFUNC handling.
The test to call the indirect function now includes a subtest to
checked whether the symbol is defined. When coming to that point
this is almost always the case. The test for STT_GNU_IFUNC on the
other hand rarely is true. Move it to the front means we don't have
to perform the second test unless really necessary.
| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | sysdeps/i386/dl-machine.h | 4 | ||||
| -rw-r--r-- | sysdeps/x86_64/dl-machine.h | 4 |
3 files changed, 8 insertions, 4 deletions
@@ -1,5 +1,9 @@ 2009-06-01 Ulrich Drepper <drepper@redhat.com> + * sysdeps/i386/dl-machine.h (elf_machine_rel): Reorder conditions + for STT_GNU_IFUNC handling for efficiency. + * sysdeps/x86_64/dl-machine.h (elf_machine_rela): Likewise. + * sysdeps/i386/dl-irel.h (elf_irel): Use __libc_fatal instead of just _exit. * sysdeps/x86_64/dl-irel.h (elf_irela): Likewise. diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h index efa929e..a093d2b 100644 --- a/sysdeps/i386/dl-machine.h +++ b/sysdeps/i386/dl-machine.h @@ -345,9 +345,9 @@ elf_machine_rel (struct link_map *map, const Elf32_Rel *reloc, Elf32_Addr value = sym_map == NULL ? 0 : sym_map->l_addr + sym->st_value; if (sym != NULL - && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1) && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, - 0)) + 0) + && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1)) value = ((Elf32_Addr (*) (void)) value) (); switch (r_type) diff --git a/sysdeps/x86_64/dl-machine.h b/sysdeps/x86_64/dl-machine.h index 1b5ce8e..61a0556 100644 --- a/sysdeps/x86_64/dl-machine.h +++ b/sysdeps/x86_64/dl-machine.h @@ -297,9 +297,9 @@ elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc, : (Elf64_Addr) sym_map->l_addr + sym->st_value); if (sym != NULL - && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1) && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, - 0)) + 0) + && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1)) value = ((Elf64_Addr (*) (void)) value) (); # if defined RTLD_BOOTSTRAP && !USE___THREAD |