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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 /iconv
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 'iconv')
-rw-r--r--iconv/gconv_int.h43
1 files changed, 28 insertions, 15 deletions
diff --git a/iconv/gconv_int.h b/iconv/gconv_int.h
index b1433f8..2afd12a 100644
--- a/iconv/gconv_int.h
+++ b/iconv/gconv_int.h
@@ -156,10 +156,12 @@ __libc_lock_define (extern, __gconv_lock attribute_hidden)
/* Return in *HANDLE decriptor for transformation from FROMSET to TOSET. */
extern int __gconv_open (const char *toset, const char *fromset,
- __gconv_t *handle, int flags);
+ __gconv_t *handle, int flags)
+ attribute_hidden;
/* Free resources associated with transformation descriptor CD. */
-extern int __gconv_close (__gconv_t cd);
+extern int __gconv_close (__gconv_t cd)
+ attribute_hidden;
/* Transform at most *INBYTESLEFT bytes from buffer starting at *INBUF
according to rules described by CD and place up to *OUTBYTESLEFT
@@ -167,33 +169,38 @@ extern int __gconv_close (__gconv_t cd);
conversions in *IRREVERSIBLE if this pointer is not null. */
extern int __gconv (__gconv_t cd, const unsigned char **inbuf,
const unsigned char *inbufend, unsigned char **outbuf,
- unsigned char *outbufend, size_t *irreversible);
+ unsigned char *outbufend, size_t *irreversible)
+ attribute_hidden;
/* Return in *HANDLE a pointer to an array with *NSTEPS elements describing
the single steps necessary for transformation from FROMSET to TOSET. */
extern int __gconv_find_transform (const char *toset, const char *fromset,
struct __gconv_step **handle,
- size_t *nsteps, int flags);
+ size_t *nsteps, int flags)
+ attribute_hidden;
/* Search for transformation in cache data. */
extern int __gconv_lookup_cache (const char *toset, const char *fromset,
struct __gconv_step **handle, size_t *nsteps,
- int flags);
+ int flags)
+ attribute_hidden;
/* Compare the two name for whether they are after alias expansion the
same. This function uses the cache and fails if none is
loaded. */
extern int __gconv_compare_alias_cache (const char *name1, const char *name2,
- int *result);
+ int *result)
+ attribute_hidden;
/* Free data associated with a step's structure. */
-extern void __gconv_release_step (struct __gconv_step *step);
+extern void __gconv_release_step (struct __gconv_step *step)
+ attribute_hidden;
/* Read all the configuration data and cache it. */
extern void __gconv_read_conf (void) attribute_hidden;
/* Try to read module cache file. */
-extern int __gconv_load_cache (void);
+extern int __gconv_load_cache (void) attribute_hidden;
/* Retrieve pointer to internal cache. */
extern void *__gconv_get_cache (void);
@@ -205,7 +212,7 @@ extern struct gconv_module *__gconv_get_modules_db (void);
extern void *__gconv_get_alias_db (void);
/* Determine the directories we are looking in. */
-extern void __gconv_get_path (void);
+extern void __gconv_get_path (void) attribute_hidden;
/* Comparison function to search alias. */
extern int __gconv_alias_compare (const void *p1, const void *p2)
@@ -214,28 +221,34 @@ extern int __gconv_alias_compare (const void *p1, const void *p2)
/* Clear reference to transformation step implementations which might
cause the code to be unloaded. */
extern int __gconv_close_transform (struct __gconv_step *steps,
- size_t nsteps);
+ size_t nsteps)
+ attribute_hidden;
/* Free all resources allocated for the transformation record when
using the cache. */
-extern void __gconv_release_cache (struct __gconv_step *steps, size_t nsteps);
+extern void __gconv_release_cache (struct __gconv_step *steps, size_t nsteps)
+ attribute_hidden;
/* Load shared object named by NAME. If already loaded increment reference
count. */
-extern struct __gconv_loaded_object *__gconv_find_shlib (const char *name);
+extern struct __gconv_loaded_object *__gconv_find_shlib (const char *name)
+ attribute_hidden;
/* Release shared object. If no further reference is available unload
the object. */
-extern void __gconv_release_shlib (struct __gconv_loaded_object *handle);
+extern void __gconv_release_shlib (struct __gconv_loaded_object *handle)
+ attribute_hidden;
/* Fill STEP with information about builtin module with NAME. */
extern void __gconv_get_builtin_trans (const char *name,
- struct __gconv_step *step);
+ struct __gconv_step *step)
+ attribute_hidden;
libc_hidden_proto (__gconv_transliterate)
/* If NAME is an codeset alias expand it. */
-extern int __gconv_compare_alias (const char *name1, const char *name2);
+extern int __gconv_compare_alias (const char *name1, const char *name2)
+ attribute_hidden;
/* Builtin transformations. */