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https://sourceware.org/git/glibc.git
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8bcdb7e0c5
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.
101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/* Copyright (C) 2001-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2001.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _GAI_MISC_H
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#define _GAI_MISC_H 1
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#include <netdb.h>
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#include <signal.h>
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/* Used to synchronize. */
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struct waitlist
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{
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struct waitlist *next;
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#ifndef DONT_NEED_GAI_MISC_COND
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pthread_cond_t *cond;
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#endif
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volatile unsigned int *counterp;
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/* The next field is used in asynchronous `lio_listio' operations. */
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struct sigevent *sigevp;
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/* XXX See requestlist, it's used to work around the broken signal
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handling in Linux. */
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pid_t caller_pid;
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};
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/* Used to queue requests.. */
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struct requestlist
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{
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int running;
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struct requestlist *next;
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/* Pointer to the actual data. */
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struct gaicb *gaicbp;
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/* List of waiting processes. */
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struct waitlist *waiting;
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};
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/* To customize the implementation one can use the following struct.
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This implementation follows the one in Irix. */
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struct gaiinit
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{
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int gai_threads; /* Maximal number of threads. */
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int gai_num; /* Number of expected simultanious requests. */
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int gai_locks; /* Not used. */
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int gai_usedba; /* Not used. */
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int gai_debug; /* Not used. */
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int gai_numusers; /* Not used. */
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int gai_idle_time; /* Number of seconds before idle thread
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terminates. */
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int gai_reserved;
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};
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/* Lock for global I/O list of requests. */
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extern pthread_mutex_t __gai_requests_mutex;
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/* Enqueue request. */
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extern struct requestlist *__gai_enqueue_request (struct gaicb *gaicbp)
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attribute_hidden;
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/* Find request on wait list. */
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extern struct requestlist *__gai_find_request (const struct gaicb *gaicbp)
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attribute_hidden;
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/* Remove request from waitlist. */
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extern int __gai_remove_request (struct gaicb *gaicbp)
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attribute_hidden;
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/* Notify initiator of request and tell this everybody listening. */
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extern void __gai_notify (struct requestlist *req)
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attribute_hidden;
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/* Notify initiator of request. */
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extern int __gai_notify_only (struct sigevent *sigev, pid_t caller_pid)
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attribute_hidden;
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/* Send the signal. */
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extern int __gai_sigqueue (int sig, const union sigval val, pid_t caller_pid);
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#endif /* gai_misc.h */
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