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authorH.J. Lu <hjl.tools@gmail.com>2017-10-01 15:07:06 -0700
committerH.J. Lu <hjl.tools@gmail.com>2017-10-01 15:07:23 -0700
commit8bcdb7e0c5346d2e9d61b208d80fd8213e1dbd90 (patch)
tree487999b729d1c71503ec9215a26d95644ca5efed /resolv
parent8ed3b64330cd24e2a17d8794a871cab034707a33 (diff)
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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 'resolv')
-rw-r--r--resolv/gai_misc.h15
1 files changed, 10 insertions, 5 deletions
diff --git a/resolv/gai_misc.h b/resolv/gai_misc.h
index 95d14ed..efadf13 100644
--- a/resolv/gai_misc.h
+++ b/resolv/gai_misc.h
@@ -75,19 +75,24 @@ extern pthread_mutex_t __gai_requests_mutex;
/* Enqueue request. */
-extern struct requestlist *__gai_enqueue_request (struct gaicb *gaicbp);
+extern struct requestlist *__gai_enqueue_request (struct gaicb *gaicbp)
+ attribute_hidden;
/* Find request on wait list. */
-extern struct requestlist *__gai_find_request (const struct gaicb *gaicbp);
+extern struct requestlist *__gai_find_request (const struct gaicb *gaicbp)
+ attribute_hidden;
/* Remove request from waitlist. */
-extern int __gai_remove_request (struct gaicb *gaicbp);
+extern int __gai_remove_request (struct gaicb *gaicbp)
+ attribute_hidden;
/* Notify initiator of request and tell this everybody listening. */
-extern void __gai_notify (struct requestlist *req);
+extern void __gai_notify (struct requestlist *req)
+ attribute_hidden;
/* Notify initiator of request. */
-extern int __gai_notify_only (struct sigevent *sigev, pid_t caller_pid);
+extern int __gai_notify_only (struct sigevent *sigev, pid_t caller_pid)
+ attribute_hidden;
/* Send the signal. */
extern int __gai_sigqueue (int sig, const union sigval val, pid_t caller_pid);