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[glibc.git] / sysdeps / mach / mprotect.c
blobf297cdbf4ca0ff93cb0eca64116276e798ae414c
1 /* Copyright (C) 1994, 1996, 1997 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
19 #include <sys/types.h>
20 #include <sys/mman.h>
21 #include <errno.h>
22 #include <mach.h>
24 /* Change the memory protection of the region starting at ADDR and
25 extending LEN bytes to PROT. Returns 0 if successful, -1 for errors
26 (and sets errno). */
28 int
29 __mprotect (__ptr_t addr, size_t len, int prot)
31 kern_return_t err;
32 vm_prot_t vmprot;
34 vmprot = VM_PROT_NONE;
35 if (prot & PROT_READ)
36 vmprot |= VM_PROT_READ;
37 if (prot & PROT_WRITE)
38 vmprot |= VM_PROT_WRITE;
39 if (prot & PROT_EXEC)
40 vmprot |= VM_PROT_EXECUTE;
42 if (err = __vm_protect (__mach_task_self (),
43 (vm_address_t) addr, (vm_size_t) len,
44 0, vmprot))
46 errno = err;
47 return -1;
49 return 0;
51 weak_alias (__mprotect, mprotect)