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diff --git a/ddb/db_access.c b/ddb/db_access.c
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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
+ */
+#include "mach_kdb.h"
+#if MACH_KDB
+
+#include <mach/boolean.h>
+#include <machine/db_machdep.h> /* type definitions */
+#include <machine/setjmp.h>
+#include <kern/task.h>
+#include <ddb/db_access.h>
+
+
+
+/*
+ * Access unaligned data items on aligned (longword)
+ * boundaries.
+ */
+
+extern void db_read_bytes(); /* machine-dependent */
+extern void db_write_bytes(); /* machine-dependent */
+
+int db_access_level = DB_ACCESS_LEVEL;
+
+/*
+ * This table is for sign-extending things.
+ * Therefore its entries are signed, and yes
+ * they are infact negative numbers.
+ * So don't you put no more Us in it. Or Ls either.
+ * Otherwise there is no point having it, n'est pas ?
+ */
+static int db_extend[sizeof(int)+1] = { /* table for sign-extending */
+ 0,
+ 0xFFFFFF80,
+ 0xFFFF8000,
+ 0xFF800000,
+ 0x80000000
+};
+
+db_expr_t
+db_get_task_value(addr, size, is_signed, task)
+ db_addr_t addr;
+ register int size;
+ boolean_t is_signed;
+ task_t task;
+{
+ char data[sizeof(db_expr_t)];
+ register db_expr_t value;
+ register int i;
+
+ db_read_bytes((void*)addr, size, data, task);
+
+ value = 0;
+#if BYTE_MSF
+ for (i = 0; i < size; i++)
+#else /* BYTE_LSF */
+ for (i = size - 1; i >= 0; i--)
+#endif
+ {
+ value = (value << 8) + (data[i] & 0xFF);
+ }
+
+ if (size <= sizeof(int)) {
+ if (is_signed && (value & db_extend[size]) != 0)
+ value |= db_extend[size];
+ }
+ return (value);
+}
+
+void
+db_put_task_value(addr, size, value, task)
+ db_addr_t addr;
+ register int size;
+ register db_expr_t value;
+ task_t task;
+{
+ char data[sizeof(db_expr_t)];
+ register int i;
+
+#if BYTE_MSF
+ for (i = size - 1; i >= 0; i--)
+#else /* BYTE_LSF */
+ for (i = 0; i < size; i++)
+#endif
+ {
+ data[i] = value & 0xFF;
+ value >>= 8;
+ }
+
+ db_write_bytes((void*)addr, size, data, task);
+}
+
+db_expr_t
+db_get_value(addr, size, is_signed)
+ db_addr_t addr;
+ int size;
+ boolean_t is_signed;
+{
+ return(db_get_task_value(addr, size, is_signed, TASK_NULL));
+}
+
+void
+db_put_value(addr, size, value)
+ db_addr_t addr;
+ int size;
+ db_expr_t value;
+{
+ db_put_task_value(addr, size, value, TASK_NULL);
+}
+
+#endif MACH_KDB