Break out debug dump functions into their own compilation unit

core/include/debug_dumps.h

@@ -0,0 +1,29 @@
+/* Functions for dumping status/debug output/etc, including fatal
+ * exception handling.
+ *
+ * Part of esp-open-rtos
+ *
+ * Copyright (C) 2015-2016 Superhouse Automation Pty Ltd
+ * BSD Licensed as described in the file LICENSE
+ */
+#ifndef _DEBUG_DUMPS_H
+#define _DEBUG_DUMPS_H
+#include <stdint.h>
+
+/* Dump stack memory starting from stack pointer address sp. */
+void dump_stack(uint32_t *sp);
+
+/* Called from exception_vectors.S when a fatal exception occurs.
+
+   Probably not useful to be called in other contexts.
+*/
+void fatal_exception_handler(uint32_t *sp);
+
+/* Dump the current exception register state.
+
+   Probably mostly useful when called from fatal exception handler.
+*/
+void dump_excinfo(void);
+
+
+#endif