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diff --git a/include/mach/kern_return.h b/include/mach/kern_return.h
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+/*
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University.
+ * Copyright (c) 1993,1994 The University of Utah and
+ * the Computer Systems Laboratory (CSL).
+ * 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, THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF
+ * THIS SOFTWARE IN ITS "AS IS" CONDITION, AND DISCLAIM 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.
+ */
+/*
+ *	File:	h/kern_return.h
+ *	Author:	Avadis Tevanian, Jr.
+ *	Date:	1985
+ *
+ *	Kernel return codes.
+ *
+ */
+
+#ifndef	_MACH_KERN_RETURN_H_
+#define _MACH_KERN_RETURN_H_
+
+#include <mach/machine/kern_return.h>
+
+#define KERN_SUCCESS			0
+
+#define KERN_INVALID_ADDRESS		1
+		/* Specified address is not currently valid.
+		 */
+
+#define KERN_PROTECTION_FAILURE		2
+		/* Specified memory is valid, but does not permit the
+		 * required forms of access.
+		 */
+
+#define KERN_NO_SPACE			3
+		/* The address range specified is already in use, or
+		 * no address range of the size specified could be
+		 * found.
+		 */
+
+#define KERN_INVALID_ARGUMENT		4
+		/* The function requested was not applicable to this
+		 * type of argument, or an argument
+		 */
+
+#define KERN_FAILURE			5
+		/* The function could not be performed.  A catch-all.
+		 */
+
+#define KERN_RESOURCE_SHORTAGE		6
+		/* A system resource could not be allocated to fulfill
+		 * this request.  This failure may not be permanent.
+		 */
+
+#define KERN_NOT_RECEIVER		7
+		/* The task in question does not hold receive rights
+		 * for the port argument.
+		 */
+
+#define KERN_NO_ACCESS			8
+		/* Bogus access restriction.
+		 */
+
+#define KERN_MEMORY_FAILURE		9
+		/* During a page fault, the target address refers to a
+		 * memory object that has been destroyed.  This
+		 * failure is permanent.
+		 */
+
+#define KERN_MEMORY_ERROR		10
+		/* During a page fault, the memory object indicated
+		 * that the data could not be returned.  This failure
+		 * may be temporary; future attempts to access this
+		 * same data may succeed, as defined by the memory
+		 * object.
+		 */
+
+/*	KERN_ALREADY_IN_SET		11	obsolete */
+
+#define KERN_NOT_IN_SET			12
+		/* The receive right is not a member of a port set.
+		 */
+
+#define KERN_NAME_EXISTS		13
+		/* The name already denotes a right in the task.
+		 */
+
+#define KERN_ABORTED			14
+		/* The operation was aborted.  Ipc code will
+		 * catch this and reflect it as a message error.
+		 */
+
+#define KERN_INVALID_NAME		15
+		/* The name doesn't denote a right in the task.
+		 */
+
+#define	KERN_INVALID_TASK		16
+		/* Target task isn't an active task.
+		 */
+
+#define KERN_INVALID_RIGHT		17
+		/* The name denotes a right, but not an appropriate right.
+		 */
+
+#define KERN_INVALID_VALUE		18
+		/* A blatant range error.
+		 */
+
+#define	KERN_UREFS_OVERFLOW		19
+		/* Operation would overflow limit on user-references.
+		 */
+
+#define	KERN_INVALID_CAPABILITY		20
+		/* The supplied (port) capability is improper.
+		 */
+
+#define KERN_RIGHT_EXISTS		21
+		/* The task already has send or receive rights
+		 * for the port under another name.
+		 */
+
+#define	KERN_INVALID_HOST		22
+		/* Target host isn't actually a host.
+		 */
+
+#define KERN_MEMORY_PRESENT		23
+		/* An attempt was made to supply "precious" data
+		 * for memory that is already present in a
+		 * memory object.
+		 */
+
+#define KERN_WRITE_PROTECTION_FAILURE	24
+		/*
+		 * A page was marked as VM_PROT_NOTIFY and an attempt was
+		 * made to write it
+		 */
+#define KERN_TERMINATED			26
+		/* Object has been terminated and is no longer available.
+		 */
+
+#endif	/* _MACH_KERN_RETURN_H_ */