| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* Copyright (C) 1994-2015 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 | <http://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 (__ptr_t 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 | weak_alias (__mprotect, mprotect) |