Support 64-bit reserved_at_zero value nacl-side

src/trusted/service_runtime/linux/nacl_bootstrap_args.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/trusted/service_runtime/sel_ldr.h"
 
 /*
  * This function handles the nacl_helper_bootstrap arguments r_debug
  * and reserved_at_zero and updates argc and argv to act as though
  * these arguments were not passed.  For example, the command
  *
- * nacl_helper_bootstrap program \
- * --r_debug=0xXXXXXXXXXXXXXXXX --reserved_at_zero=0xXXXXXXXX program_arg
+ * nacl_helper_bootstrap program --r_debug=0xXXXXXXXXXXXXXXXX \
+ * --reserved_at_zero=0xXXXXXXXXXXXXXXXX program_arg
  *
  * will result in the following argc and argv structure for program after
  * running throughg the bootstrapper:
  *
  * argc: 4
  * argv[0]: program
  * argv[1]: --r_debug=0xXXXXXXXXXXXXXXXX
- * argv[2]: --reserved_at_zero=0xXXXXXXXX
+ * argv[2]: --reserved_at_zero=0xXXXXXXXXXXXXXXXX
  * argv[3]: program_arg
  *
  * After program calls NaClHandleBootstrapArgs, the argc and argv structure
  * will be:
  *
  * argc: 2
  * argv[0]: program
  * argv[1]: program_arg
  *
  * argc_p is the pointer to the argc variable passed to main.
@@ skipping 21 matching lines @@
       0 == strncmp(argv[1], kAtZeroSwitch, sizeof(kAtZeroSwitch) - 1)) {
     NaClHandleReservedAtZero(&argv[1][sizeof(kAtZeroSwitch) - 1]);
     --argc;
     ++argv;
   }
 
   *argc_p = argc;
   *argv_p = argv;
   (*argv_p)[0] = argv0;
 }