/* Copyright (C) 2008-2018 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 <errno.h>

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include <ucontext.h>

#include <tst-stack-align.h>

ucontext_t ucp, ucp2;

char st1[262144] __attribute__((aligned (16)));

void

cf (int i, int j)

{

  if (i != 78 || j != 274)

    {

      printf ("i %d j %d\n", i, j);

      exit (1);

    }

  else if (TEST_STACK_ALIGN ())

    {

      puts ("insufficiently aligned stack");

      exit (2);

    }

}

int

do_test (void)

{

  for (size_t j = 32; j < 64; j += sizeof (long))

    {

      if (getcontext (&ucp) != 0)

	{

	  if (errno == ENOSYS)

	    {

	      puts ("context handling not supported");

	      return 0;

	    }

	  puts ("getcontext failed");

	  return 1;

	}

      ucp.uc_link = &ucp;;

      ucp.uc_stack.ss_sp = st1;

      ucp.uc_stack.ss_size = sizeof (st1) - j;

      memset (&st1[sizeof (st1) - j], 0x55, j);

      makecontext (&ucp, (void (*) (void)) cf, 2, 78, 274);

      if (swapcontext (&ucp2, &ucp) != 0)

	{

	  puts ("setcontext failed");

	  return 1;

	}

      for (size_t i = j; i > 0; i--)

	if (st1[sizeof (st1) - j + i - 1] != 0x55)

	  { printf ("fail %zd %zd\n", i, j); break; }

    }

  return 0;

}

#define TEST_FUNCTION do_test ()

#include "../test-skeleton.c"