1 files changed, 50 insertions, 0 deletions
diff --git a/sysdeps/mach/mprotect.c b/sysdeps/mach/mprotect.c
new file mode 100644
index 0000000000..5f1dbe8b5c
--- /dev/null
+++ b/sysdeps/mach/mprotect.c
@@ -0,0 +1,50 @@
+/* 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;
+}