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

src/trusted/validator_ragel/dll_utils.c

Index: src/trusted/validator_ragel/dll_utils.c
diff --git a/src/trusted/validator_ragel/dll_utils.c b/src/trusted/validator_ragel/dll_utils.c
index 13bde3e6b5c032ffe1f1c76683a9df5086266ed7..8a05a9930a70237e3fe66aeb5c21a1f4abb48d68 100644
--- a/src/trusted/validator_ragel/dll_utils.c
+++ b/src/trusted/validator_ragel/dll_utils.c
@@ -45,6 +45,11 @@ Bool ExtractRestrictedRegisterCallback(
     void *data) {
 
   struct CallbackData *callback_data = data;
+  /* UNSUPPORTED_INSTRUCTION indicates validation failure only for pnacl-mode.
+   * Since by default we are in non-pnacl-mode, the flag is simply cleared.
+   */
+  info &= ~UNSUPPORTED_INSTRUCTION;
+
   if (end <= callback_data->actual_end && (info & VALIDATION_ERRORS_MASK)) {
     callback_data->valid = FALSE;
   }