sysdeps/nacl/mprotect.c

   1 /* Change memory protections on pages.  NaCl version.
   2    Copyright (C) 2015 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sys/types.h>
  20 #include <sys/mman.h>
  21 #include <nacl-interfaces.h>
  22
  23
  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).  */
  27
  28 int
  29 __mprotect (__ptr_t addr, size_t len, int prot)
  30 {
  31   return NACL_CALL (__nacl_irt_memory.mprotect (addr, len, prot), 0);
  32 }
  33 weak_alias (__mprotect, mprotect)