Add validation caching interface.

src/trusted/validator_arm/ncvalidate.cc

 /*
  * 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 "native_client/src/trusted/validator_arm/ncvalidate.h"
 
 
 #include <vector>
@@ skipping 54 matching lines @@
   return 0;
 }
 
 NaClValidationStatus NACL_SUBARCH_NAME(ApplyValidator, arm, 32) (
     enum NaClSBKind sb_kind,
     NaClApplyValidationKind kind,
     uintptr_t guest_addr,
     uint8_t *data,
     size_t size,
     int bundle_size,
-    NaClCPUFeaturesArm *cpu_features) {
+    NaClCPUFeaturesArm *cpu_features,
+    struct NaClValidationCache *cache) {
   NaClValidationStatus status = NaClValidationFailedNotImplemented;
   UNREFERENCED_PARAMETER(cpu_features);
   UNREFERENCED_PARAMETER(sb_kind);
+  /* The ARM validator is currently unsafe w.r.t. caching. */
+  UNREFERENCED_PARAMETER(cache);
   if (bundle_size == 16) {
     if (kind == NaClApplyCodeValidation) {
         status = ((0 == NCValidateSegment(data, guest_addr, size))
                   ? NaClValidationSucceeded : NaClValidationFailed);
     }
   }
   return status;
 }
 
 NaClValidationStatus NACL_SUBARCH_NAME(ApplyValidatorCodeReplacement, arm, 32)
@@ skipping 26 matching lines @@
   UNREFERENCED_PARAMETER(guest_addr);
   UNREFERENCED_PARAMETER(data_old);
   UNREFERENCED_PARAMETER(data_new);
   UNREFERENCED_PARAMETER(size);
   UNREFERENCED_PARAMETER(bundle_size);
   UNREFERENCED_PARAMETER(cpu_features);
   return NaClValidationFailedNotImplemented;
 }
 
 EXTERN_C_END