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diff --git a/Marlin/src/HAL/shared/backtrace/unwmemaccess.h b/Marlin/src/HAL/shared/backtrace/unwmemaccess.h
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+/***************************************************************************
+ * ARM Stack Unwinder, Michael.McTernan.2001@cs.bris.ac.uk
+ * Updated, adapted and several bug fixes on 2018 by Eduardo José Tagle
+ *
+ * This program is PUBLIC DOMAIN.
+ * This means that there is no copyright and anyone is able to take a copy
+ * for free and use it as they wish, with or without modifications, and in
+ * any context, commerically or otherwise. The only limitation is that I
+ * don't guarantee that the software is fit for any purpose or accept any
+ * liability for its use or misuse - this software is without warranty.
+ ***************************************************************************
+ * File Description: Utility functions to access memory
+ **************************************************************************/
+
+#pragma once
+
+#include "unwarm.h"
+#include <stdint.h>
+
+bool UnwReadW(const uint32_t a, uint32_t *v);
+bool UnwReadH(const uint32_t a, uint16_t *v);
+bool UnwReadB(const uint32_t a, uint8_t *v);