1/* mprotect with a memory protection key.
2 Copyright (C) 2017-2018 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <sys/mman.h>
21#include <sys/syscall.h>
22#include <sysdep.h>
23
24int
25pkey_mprotect (void *addr, size_t len, int prot, int pkey)
26{
27 if (pkey == -1)
28 /* If the key is -1, the system call is precisely equivalent to
29 mprotect. */
30 return __mprotect (addr, len, prot);
31#ifdef __NR_pkey_mprotect
32 return INLINE_SYSCALL_CALL (pkey_mprotect, addr, len, prot, pkey);
33#else
34 __set_errno (ENOSYS);
35 return -1;
36#endif
37}
38