1 | /* Copyright (C) 1994-2022 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
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 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <sys/types.h> |
19 | #include <sys/mman.h> |
20 | #include <errno.h> |
21 | #include <mach.h> |
22 | |
23 | /* Change the memory protection of the region starting at ADDR and |
24 | extending LEN bytes to PROT. Returns 0 if successful, -1 for errors |
25 | (and sets errno). */ |
26 | |
27 | int |
28 | __mprotect (void *addr, size_t len, int prot) |
29 | { |
30 | kern_return_t err; |
31 | vm_prot_t vmprot; |
32 | |
33 | vmprot = VM_PROT_NONE; |
34 | if (prot & PROT_READ) |
35 | vmprot |= VM_PROT_READ; |
36 | if (prot & PROT_WRITE) |
37 | vmprot |= VM_PROT_WRITE; |
38 | if (prot & PROT_EXEC) |
39 | vmprot |= VM_PROT_EXECUTE; |
40 | |
41 | if (err = __vm_protect (__mach_task_self (), |
42 | (vm_address_t) addr, (vm_size_t) len, |
43 | 0, vmprot)) |
44 | { |
45 | errno = err; |
46 | return -1; |
47 | } |
48 | return 0; |
49 | } |
50 | libc_hidden_def (__mprotect) |
51 | weak_alias (__mprotect, mprotect) |
52 | |