Index: generic/include/syscall/copy.h
===================================================================
--- generic/include/syscall/copy.h	(revision de07bcf5893aee4d667e2094636cd1512e4be1d8)
+++ generic/include/syscall/copy.h	(revision de07bcf5893aee4d667e2094636cd1512e4be1d8)
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2006 Jakub Jermar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __COPY_H__
+#define __COPY_H__
+
+#include <typedefs.h>
+
+/** Label within memcpy_from_uspace() that contains return -1. */
+extern char memcpy_from_uspace_failover_address;
+
+/** Label within memcpy_to_uspace() that contains return -1. */
+extern char memcpy_to_uspace_failover_address;
+
+extern int copy_from_uspace(void *dst, void *uspace_src, size_t size);
+extern int copy_to_uspace(void *dst_uspace, void *src, size_t size);
+
+/*
+ * This interface must be implemented by each architecture.
+ */
+extern int memcpy_from_uspace(void *dst, void *uspace_src, size_t size);
+extern int memcpy_to_uspace(void *uspace_dst, void *src, size_t size);
+
+#endif