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Mark internal stdio functions with attribute_hidden [BZ #18822] 

Mark internal stdio functions with attribute_hidden to allow direct
access within libc.so and libc.a without using GOT nor PLT.

	[BZ #18822]
	* include/stdio.h (__fcloseall): Add attribute_hidden.
	(__getline): Likewise.
	(__path_search): Likewise.
	(__gen_tempname): Likewise.
	(__libc_message): Likewise.
	(__flockfile): Likewise.
	(__funlockfile): Likewise.
	(__fxprintf): Likewise.
	(__fxprintf_nocancel): Likewise.
This commit is contained in:
H.J. Lu 2017-10-01 15:19:51 -07:00
parent 94fd682c9b
commit 2e0a69097d
2 changed files with 22 additions and 9 deletions
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13
ChangeLog
View File

@ -1,3 +1,16 @@
2017-10-01 H.J. Lu <hongjiu.lu@intel.com>
[BZ #18822]
* include/stdio.h (__fcloseall): Add attribute_hidden.
(__getline): Likewise.
(__path_search): Likewise.
(__gen_tempname): Likewise.
(__libc_message): Likewise.
(__flockfile): Likewise.
(__funlockfile): Likewise.
(__fxprintf): Likewise.
(__fxprintf_nocancel): Likewise.
2017-10-01 H.J. Lu <hongjiu.lu@intel.com>
[BZ #18822]

18
include/stdio.h
View File

@ -4,7 +4,7 @@
/* Now define the internal interfaces. */
extern int __fcloseall (void);
extern int __fcloseall (void) attribute_hidden;
extern int __snprintf (char *__restrict __s, size_t __maxlen,
const char *__restrict __format, ...)
__attribute__ ((__format__ (__printf__, 3, 4)));
@ -21,7 +21,7 @@ extern int __vscanf (const char *__restrict __format,
_G_va_list __arg)
__attribute__ ((__format__ (__scanf__, 1, 0)));
extern _IO_ssize_t __getline (char **__lineptr, size_t *__n,
FILE *__stream);
FILE *__stream) attribute_hidden;
extern int __vsscanf (const char *__restrict __s,
const char *__restrict __format,
_G_va_list __arg)
@ -77,10 +77,10 @@ extern FILE *__old_tmpfile (void);
/* Generate a unique file name (and possibly open it). */
extern int __path_search (char *__tmpl, size_t __tmpl_len,
const char *__dir, const char *__pfx,
int __try_tempdir);
int __try_tempdir) attribute_hidden;
extern int __gen_tempname (char *__tmpl, int __suffixlen, int __flags,
int __kind);
int __kind) attribute_hidden;
/* The __kind argument to __gen_tempname may be one of: */
# define __GT_FILE 0 /* create a file */
# define __GT_DIR 1 /* create a directory */
@ -97,7 +97,7 @@ enum __libc_message_action
extern void __libc_fatal (const char *__message)
__attribute__ ((__noreturn__));
extern void __libc_message (enum __libc_message_action action,
const char *__fnt, ...);
const char *__fnt, ...) attribute_hidden;
extern void __fortify_fail (const char *msg) __attribute__ ((__noreturn__));
extern void __fortify_fail_abort (_Bool, const char *msg)
__attribute__ ((__noreturn__)) attribute_hidden;
@ -105,10 +105,10 @@ libc_hidden_proto (__fortify_fail)
libc_hidden_proto (__fortify_fail_abort)
/* Acquire ownership of STREAM. */
extern void __flockfile (FILE *__stream);
extern void __flockfile (FILE *__stream) attribute_hidden;
/* Relinquish the ownership granted for STREAM. */
extern void __funlockfile (FILE *__stream);
extern void __funlockfile (FILE *__stream) attribute_hidden;
/* Try to acquire ownership of STREAM but do not block if it is not
possible. */
@ -118,9 +118,9 @@ extern int __getc_unlocked (FILE *__fp);
extern wint_t __getwc_unlocked (FILE *__fp);
extern int __fxprintf (FILE *__fp, const char *__fmt, ...)
__attribute__ ((__format__ (__printf__, 2, 3)));
__attribute__ ((__format__ (__printf__, 2, 3))) attribute_hidden;
extern int __fxprintf_nocancel (FILE *__fp, const char *__fmt, ...)
__attribute__ ((__format__ (__printf__, 2, 3)));
__attribute__ ((__format__ (__printf__, 2, 3))) attribute_hidden;
extern const char *const _sys_errlist_internal[] attribute_hidden;
extern int _sys_nerr_internal attribute_hidden;