/* Check compatibility of legacy executable with a JIT engine.

   Copyright (C) 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 Lesser General Public

   License along with the GNU C Library; if not, see

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

#include <stdio.h>

#include <sys/mman.h>

#include <support/xunistd.h>

/* Check that mmapped legacy code works with -fcf-protection=none.  */

static int

do_test (void)

{

  void (*funcp) (void);

  funcp = xmmap (NULL, 0x1000, PROT_EXEC | PROT_READ | PROT_WRITE,

		 MAP_ANONYMOUS | MAP_PRIVATE, -1);

  printf ("mmap = %p\n", funcp);

  /* Write RET instruction.  */

  *(char *) funcp = 0xc3;

  funcp ();

  return 0;

}

#include <support/test-driver.c>