/* Copyright (C) 2009-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Jakub Jelinek <jakub@redhat.com>.

   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 <errno.h>

#include <sysdep.h>

#include <setjmp.h>

#include <bits/setjmp.h>

#include <stdlib.h>

#include <unistd.h>

#include <stdio.h>

#include <stdint.h>

#include <signal.h>

#include <sys/syscall.h>

#define __longjmp ____longjmp_chk

#define CHECK_SP(env, guard) \

  do									\

    {									\

      uintptr_t cur_sp;							\

      uintptr_t new_sp = env->__gregs[9];				\

      __asm__ ("lr %0, %%r15" : "=r" (cur_sp));				\

      new_sp ^= guard;							\

      if (new_sp < cur_sp)						\

	{								\

	  stack_t oss;							\

	  INTERNAL_SYSCALL_DECL (err);					\

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

	  if (!INTERNAL_SYSCALL_ERROR_P (res, err))			\

	    {								\

	      if ((oss.ss_flags & SS_ONSTACK) == 0			\

		  || ((uintptr_t) (oss.ss_sp + oss.ss_size) - new_sp	\

		      < oss.ss_size))					\

		__fortify_fail ("longjmp causes uninitialized stack frame");\

	    }								\

	}								\

    } while (0)

#include "__longjmp.c"