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

src/trusted/validator/ncvalidate.h

Index: src/trusted/validator/ncvalidate.h
diff --git a/src/trusted/validator/ncvalidate.h b/src/trusted/validator/ncvalidate.h
index 31f55e454166a8982282c46f7f8615e4a115e698..989c44b699c61f8b6972cc9b0e3773c6cbf168ce 100644
--- a/src/trusted/validator/ncvalidate.h
+++ b/src/trusted/validator/ncvalidate.h
@@ -20,6 +20,11 @@ EXTERN_C_BEGIN
 struct NaClValidationCache;
 struct NaClValidationMetadata;
 
+/* Defines possible validation flags. */
+typedef enum NaClValidationFlags {
+  DISABLE_UNSUPPORTED = 0x1
+} NaClValidationFlags;
+
 /* Defines possible validation status values. */
 typedef enum NaClValidationStatus {
   /* The call to the validator succeeded. */
@@ -63,6 +68,7 @@ typedef NaClValidationStatus (*NaClValidateFunc)(
     uint8_t *data,
     size_t size,
     int stubout_mode,
+    uint32_t flags,
     int readonly_text,
     const NaClCPUFeatures *cpu_features,
     const struct NaClValidationMetadata *metadata,