/* mprotect with a memory protection key.

   Copyright (C) 2017-2018 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 <sys/mman.h>

#include <sys/syscall.h>

#include <sysdep.h>

int

pkey_mprotect (void *addr, size_t len, int prot, int pkey)

{

  if (pkey == -1)

    /* If the key is -1, the system call is precisely equivalent to

       mprotect.  */

    return __mprotect (addr, len, prot);

#ifdef __NR_pkey_mprotect

  return INLINE_SYSCALL_CALL (pkey_mprotect, addr, len, prot, pkey);

#else

  __set_errno (ENOSYS);

  return -1;

#endif

}