Enable check for DEP / NX page protection

src/trusted/service_runtime/web_worker_stub.c

 /*
  * Copyright 2008 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.
  */
 
 /*
  * Chrome native WebWorker support.
  */
 #include "native_client/src/include/portability.h"
 #include "native_client/src/include/portability_io.h"
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 /*
  * There is a lot of partial commonality between this and sel_main.c
  * TODO(sehr): refactor to eliminate the commonality.
  */
 
 #include "native_client/src/shared/gio/gio.h"
 #include "native_client/src/shared/imc/nacl_imc_c.h"
 #include "native_client/src/shared/platform/nacl_log.h"
 #include "native_client/src/shared/platform/nacl_sync.h"
 #include "native_client/src/shared/platform/nacl_sync_checked.h"
 #include "native_client/src/shared/srpc/nacl_srpc.h"
 
 #include "native_client/src/trusted/desc/nacl_desc_imc.h"
+#include "native_client/src/trusted/platform_qualify/nacl_dep_qualify.h"
 #include "native_client/src/trusted/platform_qualify/nacl_os_qualify.h"
 
 #include "native_client/src/trusted/service_runtime/nacl_globals.h"
 #include "native_client/src/trusted/service_runtime/expiration.h"
 #include "native_client/src/trusted/service_runtime/nacl_all_modules.h"
 #include "native_client/src/trusted/service_runtime/nacl_app.h"
 #include "native_client/src/trusted/service_runtime/nacl_globals.h"
 #include "native_client/src/trusted/service_runtime/nacl_syscall_common.h"
 #include "native_client/src/trusted/service_runtime/sel_ldr.h"
 #include "native_client/src/trusted/service_runtime/web_worker_stub.h"
@@ skipping 95 matching lines @@
 
   *nap = state;
 
   /*
    * Ensure this operating system platform is supported.
    */
   if (!NaClOsIsSupported()) {
     goto done;
   }
   /*
+   * Ensure this platform has Data Execution Prevention enabled.
+   */
+  if (!NaClCheckDEP()) {
+    goto done;
+  }
+  /*
    * Load the NaCl module from the memory file.
    */
   if (LOAD_OK != NaClAppLoadFile((struct Gio *) &gf,
                                  *nap,
                                  NACL_ABI_CHECK_OPTION_CHECK)) {
     goto done;
   }
   /*
    * Close the memory pseudo-file used for passing in the .nexe.
    */
@@ skipping 275 matching lines @@
 }
 
 /*
  * Part of the initialization of a worker.  Sends the descriptor to the
  * worker library to indicate where to send postMessage RPCs.
  */
 int NaClSrpcSendUpcallDesc(struct NaClSrpcChannel *channel,
                            struct NaClDesc *nacl_desc) {
   return NaClSrpcInvokeBySignature(channel, "setUpcallDesc:h:", nacl_desc);
 }