mprotect system call exposed to the untrusted code.

src/untrusted/irt/irt_interfaces.c

 /*
  * Copyright (c) 2012 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <string.h>
 
 #include "native_client/src/include/nacl_macros.h"
 #include "native_client/src/untrusted/irt/irt.h"
@@ skipping 21 matching lines @@
       sizeof(nacl_irt_resource_open) },
 #ifdef IRT_PPAPI
   { NACL_IRT_PPAPIHOOK_v0_1, &nacl_irt_ppapihook, sizeof(nacl_irt_ppapihook) },
 #endif
   { NACL_IRT_RANDOM_v0_1, &nacl_irt_random, sizeof(nacl_irt_random) },
   { NACL_IRT_CLOCK_v0_1, &nacl_irt_clock, sizeof(nacl_irt_clock) },
   { NACL_IRT_DEV_GETPID_v0_1, &nacl_irt_dev_getpid,
     sizeof(nacl_irt_dev_getpid) },
   { NACL_IRT_DEV_EXCEPTION_HANDLING_v0_1, &nacl_irt_dev_exception_handling,
     sizeof(nacl_irt_dev_exception_handling) },
+  { NACL_IRT_DEV_MPROTECT_v0_1, &nacl_irt_dev_mprotect,
+    sizeof(nacl_irt_dev_mprotect) },
 };
 
 size_t nacl_irt_interface(const char *interface_ident,
                           void *table, size_t tablesize) {
   int i;
   for (i = 0; i < NACL_ARRAY_SIZE(irt_interfaces); ++i) {
     if (0 == strcmp(interface_ident, irt_interfaces[i].name)) {
       const size_t size = irt_interfaces[i].size;
       if (size <= tablesize) {
         memcpy(table, irt_interfaces[i].table, size);
         return size;
       }
       break;
     }
   }
   return 0;
 }