base-mb: Fix compile and link errors

Fix #531

base-mb/include/cpu/string.h

@@ -0,0 +1,54 @@
+/*
+ * \brief  Cpu specifi memcpy
+ * \author Martin Stein
+ * \date   2012-11-27
+ */
+
+/*
+ * Copyright (C) 2012 Genode Labs GmbH
+ *
+ * This file is part of the Genode OS framework, which is distributed
+ * under the terms of the GNU General Public License version 2.
+ */
+
+#ifndef _BASE_MB__INCLUDE__CPU__STRING_H_
+#define _BASE_MB__INCLUDE__CPU__STRING_H_
+
+#include <base/stdint.h>
+
+namespace Genode
+{
+	/**
+	 * Copy memory block
+	 *
+	 * \param dst   destination memory block
+	 * \param src   source memory block
+	 * \param size  number of bytes to copy
+	 *
+	 * \return      Number of bytes not copied
+	 */
+	inline size_t memcpy_cpu(void *dst, const void *src, size_t size)
+	{
+		unsigned char *d = (unsigned char *)dst, *s = (unsigned char *)src;
+
+		/* check 4 byte; alignment */
+		size_t d_align = (size_t)d & 0x3;
+		size_t s_align = (size_t)s & 0x3;
+
+		/* at least 32 bytes, 4 byte aligned, same alignment */
+		if (size < 32 || (d_align ^ s_align))
+			return size;
+
+		/* copy to 4 byte alignment */
+		for (size_t i = 0; i < s_align; i++, *d++ = *s++, size--);
+
+		/* copy words */
+		uint32_t * dw = (uint32_t *)d;
+		uint32_t * sw = (uint32_t *)s;
+		for (; size >= 4; size -= 4, dw++, sw++) *dw = *sw;
+
+		return size;
+	}
+}
+
+#endif /* _BASE_MB__INCLUDE__CPU__STRING_H_ */