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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-10-01 15:07:06 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-10-01 15:07:23 -0700 |
| commit | 8bcdb7e0c5346d2e9d61b208d80fd8213e1dbd90 (patch) | |
| tree | 487999b729d1c71503ec9215a26d95644ca5efed /sysdeps/generic/ldsodefs.h | |
| parent | 8ed3b64330cd24e2a17d8794a871cab034707a33 (diff) | |
| download | glibc-8bcdb7e0c5346d2e9d61b208d80fd8213e1dbd90.tar.gz glibc-8bcdb7e0c5346d2e9d61b208d80fd8213e1dbd90.tar.xz glibc-8bcdb7e0c5346d2e9d61b208d80fd8213e1dbd90.zip | |
Mark internal functions with attribute_hidden [BZ #18822]
Mark internal functions with attribute_hidden to allow direct access to
internal functions within libc.so and libc.a without using GOT nor PLT.
Size comparison of libc.so:
On x86-64:
text data bss dec hex
Before: 1728577 20584 17088 1766249 1af369
After : 1728593 20584 17088 1766265 1af379
The only change is __gconv_release_shlib in iconv/gconv_dl.c is inlined
since it is hidden, which increases the code size of gconv_dl.os by 18
bytes.
On i686:
text data bss dec hex
Before: 1869039 11444 11112 1891595 1cdd0b
After : 1868635 11444 11112 1891191 1cdb77
The code size is decreased by avoiding GOT/PLT for hidden functions.
[BZ #18822]
* iconv/gconv_int.h (__gconv_open): Add attribute_hidden.
(__gconv_close): Likewise.
(__gconv): Likewise.
(__gconv_find_transform): Likewise.
(__gconv_lookup_cache): Likewise.
(__gconv_compare_alias_cache): Likewise.
(__gconv_load_cache): Likewise.
(__gconv_get_path): Likewise.
(__gconv_close_transform): Likewise.
(__gconv_release_cache): Likewise.
(__gconv_find_shlib): Likewise.
(__gconv_release_shlib): Likewise.
(__gconv_get_builtin_trans): Likewise.
(__gconv_compare_alias): Likewise.
* include/dlfcn.h (_dlerror_run): Likewise.
* include/stdio.h (__fortify_fail_abort): Likewise.
* include/time.h (__tz_compute): Likewise.
(__strptime_internal): Likewise.
* intl/gettextP.h (_nl_find_domain): Likewise.
(_nl_load_domain): Likewise.
(_nl_find_msg): Likewise.
* intl/plural-exp.h (FREE_EXPRESSION): Likewise.
(EXTRACT_PLURAL_EXPRESSION): Likewise.
* locale/coll-lookup.h (__collidx_table_lookup): Likewise.
* resolv/gai_misc.h (__gai_enqueue_request): Likewise.
(__gai_find_request): Likewise.
(__gai_remove_request): Likewise.
(__gai_notify): Likewise.
(__gai_notify_only): Likewise.
* sysdeps/generic/aio_misc.h (__aio_sigqueue): Likewise.
* sysdeps/generic/ldsodefs.h (_dl_fini): Likewise.
(_dl_non_dynamic_init): Likewise.
(_dl_aux_init): Likewise.
* sysdeps/i386/machine-gmon.h (mcount_internal): Likewise.
* sysdeps/unix/sysv/linux/i386/olddirent.h (__old_getdents64):
Likewise.
* wcsmbs/wcsmbsload.h (__wcsmbs_load_conv): Likewise.
(__wcsmbs_clone_conv): Likewise.
(__wcsmbs_named_conv): Likewise.
Diffstat (limited to 'sysdeps/generic/ldsodefs.h')
| -rw-r--r-- | sysdeps/generic/ldsodefs.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h index 1a4449eeb3..5efae2d96d 100644 --- a/sysdeps/generic/ldsodefs.h +++ b/sysdeps/generic/ldsodefs.h @@ -954,7 +954,7 @@ extern void _dl_init (struct link_map *main_map, int argc, char **argv, /* Call the finalizer functions of all shared objects whose initializer functions have completed. */ -extern void _dl_fini (void); +extern void _dl_fini (void) attribute_hidden; /* Sort array MAPS according to dependencies of the contained objects. */ extern void _dl_sort_fini (struct link_map **maps, size_t nmaps, char *used, @@ -1123,10 +1123,12 @@ extern struct link_map *_dl_find_dso_for_object (const ElfW(Addr) addr); rtld_hidden_proto (_dl_find_dso_for_object) /* Initialization which is normally done by the dynamic linker. */ -extern void _dl_non_dynamic_init (void); +extern void _dl_non_dynamic_init (void) + attribute_hidden; /* Used by static binaries to check the auxiliary vector. */ -extern void _dl_aux_init (ElfW(auxv_t) *av); +extern void _dl_aux_init (ElfW(auxv_t) *av) + attribute_hidden; __END_DECLS |