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.

diff --git a/ChangeLog b/ChangeLog
index 0ed599dbd27919c171a25d70774c652dc4a47620..905e7e8e9f34d42f107d28f3e09b3d121a2d4b1b 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -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]

diff --git a/include/stdio.h b/include/stdio.h
index 7625a2a3a09c5aa535cb8ee8e797b6b5e2aa2b3d..f1e987ae5e336e3da03213d698794e8415756eb5 100644 (file)
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -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;