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/* Copyright (C) 2009-2020 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) \
{ \
stack_t 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>
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