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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 /include/dlfcn.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 'include/dlfcn.h')
| -rw-r--r-- | include/dlfcn.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/dlfcn.h b/include/dlfcn.h index 888e84d4b8..526086f1a0 100644 --- a/include/dlfcn.h +++ b/include/dlfcn.h @@ -72,7 +72,8 @@ extern void *_dl_vsym (void *handle, const char *name, const char *version, _dl_catch_error. Returns zero for success, nonzero for failure; and arranges for `dlerror' to return the error details. ARGS is passed as argument to OPERATE. */ -extern int _dlerror_run (void (*operate) (void *), void *args); +extern int _dlerror_run (void (*operate) (void *), void *args) + attribute_hidden; #ifdef SHARED # define DL_CALLER_DECL /* Nothing */ |