A mechanism to identify/forbid/"rewrite" non-temporal instructions (and other)

src/trusted/validator_mips/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_mips/ncvalidate.h"
 
 #include <vector>
 
 #include "native_client/src/include/nacl_string.h"
 #include "native_client/src/include/portability.h"
+#include "native_client/src/shared/platform/nacl_check.h"
 #include "native_client/src/shared/utils/types.h"
 #include "native_client/src/trusted/service_runtime/arch/mips/sel_ldr_mips.h"
 #include "native_client/src/trusted/cpu_features/arch/mips/cpu_mips.h"
 #include "native_client/src/trusted/validator/validation_cache.h"
 #include "native_client/src/trusted/validator_mips/model.h"
 #include "native_client/src/trusted/validator_mips/validator.h"
 
 using nacl_mips_val::SfiValidator;
 using nacl_mips_val::CodeSegment;
 using nacl_mips_dec::Register;
@@ skipping 87 matching lines @@
   if (!success) return 2;
 
   return 0;
 }
 
 static NaClValidationStatus ApplyValidatorMips(
     uintptr_t guest_addr,
     uint8_t *data,
     size_t size,
     int stubout_mode,
+    uint32_t flags,
     int readonly_text,
     const NaClCPUFeatures *cpu_features,
     const struct NaClValidationMetadata *metadata,
     struct NaClValidationCache *cache) {
+  CHECK((flags & MIPS_VALIDATION_FLAGS_MASK) == 0);
   void *query = NULL;
   const NaClCPUFeaturesMips *features =
       (const NaClCPUFeaturesMips *) cpu_features;
   NaClValidationStatus status = NaClValidationFailedNotImplemented;
 
   /* Don't cache in stubout mode. */
   if (stubout_mode)
     cache = NULL;
 
   /* If the validation caching interface is available, perform a query. */
@@ skipping 104 matching lines @@
  */
 int NaClCopyInstruction(uint8_t *dst, uint8_t *src, uint8_t sz) {
   UNREFERENCED_PARAMETER(dst);
   UNREFERENCED_PARAMETER(src);
   UNREFERENCED_PARAMETER(sz);
 
   return 0;
 }
 
 EXTERN_C_END