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- /* Copyright (C) 1994 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 Library General Public License as
- published by the Free Software Foundation; either version 2 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #include <sys/types.h>
- #include <sys/mman.h>
- #include <errno.h>
- #include <mach.h>
-
- /* Change the memory protection of the region starting at ADDR and
- extending LEN bytes to PROT. Returns 0 if successful, -1 for errors
- (and sets errno). */
-
- int
- mprotect (caddr_t addr, size_t len, int prot)
- {
- kern_return_t err;
- vm_prot_t vmprot;
-
- vmprot = VM_PROT_NONE;
- if (prot & PROT_READ)
- vmprot |= VM_PROT_READ;
- if (prot & PROT_WRITE)
- vmprot |= VM_PROT_WRITE;
- if (prot & PROT_EXEC)
- vmprot |= VM_PROT_EXECUTE;
-
- if (err = __vm_protect (__mach_task_self (),
- (vm_address_t) addr, (vm_size_t) len,
- 0, vmprot))
- {
- errno = err;
- return -1;
- }
- return 0;
- }
-