Always indirect branch to __libc_start_main via GOT
[glibc.git] / debug / printf_chk.c
blob1df23893258fe37e354a8c52e04f96ecc605fa54
1 /* Copyright (C) 1991-2016 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
18 #include <stdarg.h>
19 #include <stdio.h>
20 #include "../libio/libioP.h"
23 /* Write formatted output to stdout from the format string FORMAT. */
24 int
25 ___printf_chk (int flag, const char *format, ...)
27 va_list ap;
28 int done;
30 _IO_acquire_lock_clear_flags2 (stdout);
31 if (flag > 0)
32 stdout->_flags2 |= _IO_FLAGS2_FORTIFY;
34 va_start (ap, format);
35 done = vfprintf (stdout, format, ap);
36 va_end (ap);
38 if (flag > 0)
39 stdout->_flags2 &= ~_IO_FLAGS2_FORTIFY;
40 _IO_release_lock (stdout);
42 return done;
44 ldbl_strong_alias (___printf_chk, __printf_chk)