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

src/trusted/validator_ragel/dfa_validate_common.h

Index: src/trusted/validator_ragel/dfa_validate_common.h
diff --git a/src/trusted/validator_ragel/dfa_validate_common.h b/src/trusted/validator_ragel/dfa_validate_common.h
index 4835f2006ea7b4945f440b3be0a3b35ec5cc63a9..c60a6533ce720cbb96a221db34ab450c850d78f2 100644
--- a/src/trusted/validator_ragel/dfa_validate_common.h
+++ b/src/trusted/validator_ragel/dfa_validate_common.h
@@ -31,10 +31,16 @@
 Bool NaClDfaProcessValidationError(const uint8_t *begin, const uint8_t *end,
                                    uint32_t info, void *callback_data);
 
-Bool NaClDfaStubOutCPUUnsupportedInstruction(const uint8_t *begin,
-                                             const uint8_t *end,
-                                             uint32_t info,
-                                             void *callback_data);
+struct StubOutCallbackData {
+  int pnacl_mode;

[Petr Hosek, 2015/07/28 19:05:46]

Change to `uint32_t flags` please.

[ruiq, 2015/07/28 21:34:55]

Done.

+  int did_rewrite;
+};
+
+Bool NaClDfaStubOutUnsupportedInstruction(const uint8_t *begin,
+                                          const uint8_t *end,
+                                          uint32_t info,
+                                          void *callback_data);
+
 struct CodeCopyCallbackData {
   NaClCopyInstructionFunc copy_func;
   /* Difference between addresses: dest - src.  */