[stage1] Add exception handlers... which somehow don't work?

fusee/fusee-primary/src/exception_handlers.h

@@ -0,0 +1,12 @@
+#ifndef FUSEE_EXCEPTION_HANDLERS_H
+#define FUSEE_EXCEPTION_HANDLERS_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+/* Copies up to len bytes, stops and returns the read length on data fault. */
+size_t safecpy(void *dst, const void *src, size_t len);
+
+void setup_exception_handlers(void);
+
+#endif