/* Copyright (C) 2009-2018 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 Lesser General Public

   License along with the GNU C Library.  If not, see

   <http://www.gnu.org/licenses/>.  */

#include <stdio.h>

#include <signal.h>

#include <sysdep.h>

#define __longjmp ____longjmp_chk

#define CHECK_SP(sp)							      \

  do {									      \

    register unsigned long this_sp asm ("sp");				      \

    if ((unsigned long) (sp) < this_sp)					      \

      {									      \

	stack_t oss;							      \

	INTERNAL_SYSCALL_DECL (err);					      \

	int result = INTERNAL_SYSCALL (sigaltstack, err, 2, NULL, &oss;;      \

	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>