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diff --git a/ddb/db_access.h b/ddb/db_access.h
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+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ *	Author: David B. Golub, Carnegie Mellon University
+ *	Date:	7/90
+ */
+/*
+ * Data access functions for debugger.
+ */
+#include <mach/boolean.h>
+#include <machine/db_machdep.h>
+#include <ddb/db_task_thread.h>
+#include "vm_param.h"
+
+/* implementation dependent access capability */
+#define	DB_ACCESS_KERNEL	0	/* only kernel space */
+#define DB_ACCESS_CURRENT	1	/* kernel or current task space */
+#define DB_ACCESS_ANY		2	/* any space */
+
+#ifndef	DB_ACCESS_LEVEL
+#define DB_ACCESS_LEVEL		DB_ACCESS_KERNEL
+#endif	DB_ACCESS_LEVEL
+
+#ifndef DB_VALID_KERN_ADDR
+#define DB_VALID_KERN_ADDR(addr)	((addr) >= VM_MIN_KERNEL_ADDRESS \
+					  && (addr) < VM_MAX_KERNEL_ADDRESS)
+#define DB_VALID_ADDRESS(addr,user)	((user != 0) ^ DB_VALID_KERN_ADDR(addr))
+#define DB_PHYS_EQ(task1,addr1,task2,addr2)	0
+#define DB_CHECK_ACCESS(addr,size,task)	db_is_current_task(task)
+#endif	DB_VALID_KERN_ADDR
+
+extern int db_access_level;
+
+extern db_expr_t db_get_value(	db_addr_t addr,
+				int size,
+				boolean_t is_signed );
+
+extern void	 db_put_value(	db_addr_t addr,
+				int size,
+				db_expr_t value );
+
+extern db_expr_t db_get_task_value(	db_addr_t addr,
+					int size,
+					boolean_t is_signed,
+					task_t task );
+
+extern void	 db_put_task_value(	db_addr_t addr,
+					int size,
+					db_expr_t value,
+					task_t task );