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-rw-r--r--src/include/cpu/x86/smm.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/include/cpu/x86/smm.h b/src/include/cpu/x86/smm.h
index 7dcf4d70e2..9942772f0e 100644
--- a/src/include/cpu/x86/smm.h
+++ b/src/include/cpu/x86/smm.h
@@ -527,6 +527,10 @@ struct smm_module_params {
void *arg;
int cpu;
const struct smm_runtime *runtime;
+ /* A canary value that has been placed at the end of the stack.
+ * If (uintptr_t)canary != *canary then a stack overflow has occurred.
+ */
+ const uintptr_t *canary;
};
/* smm_handler_t is called with arg of smm_module_params pointer. */