| /* Copyright (C) 2009-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING. If not, write to the Free |
| Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301, USA. */ |
| |
| #include <stdio.h> |
| #include <signal.h> |
| #include <sysdep.h> |
| #define __longjmp ____longjmp_chk |
| #define CHECK_SP(sp) \ |
| do { \ |
| register unsigned long this_sp asm ("r30"); \ |
| /* The stack grows up, therefore frames that were created and then \ |
| destroyed must all have stack values higher than ours. */ \ |
| if ((unsigned long) (sp) > this_sp) \ |
| { \ |
| struct sigaltstack oss; \ |
| INTERNAL_SYSCALL_DECL (err); \ |
| int result = INTERNAL_SYSCALL (sigaltstack, err, 2, NULL, &oss);\ |
| /* If we aren't using an alternate stack then we have already \ |
| shown that we are jumping to a frame that doesn't exist so \ |
| error out. If we are using an alternate stack we must prove \ |
| that we are jumping *out* of the alternate stack. Note that \ |
| the check for that is the same as that for _STACK_GROWS_UP \ |
| as for _STACK_GROWS_DOWN. */ \ |
| if (!INTERNAL_SYSCALL_ERROR_P (result, err) \ |
| && ((oss.ss_flags & SS_ONSTACK) == 0 \ |
| || ((unsigned long) oss.ss_sp + oss.ss_size \ |
| - (unsigned long) (sp)) < oss.ss_size)) \ |
| __fortify_fail ("longjmp causes uninitialized stack frame"); \ |
| } \ |
| } while (0) |
| |
| #include <__longjmp.c> |
