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diff --git a/include/mach/task_special_ports.h b/include/mach/task_special_ports.h
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+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989,1988,1987 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.
+ */
+/*
+ *	File:	mach/task_special_ports.h
+ *
+ *	Defines codes for special_purpose task ports.  These are NOT
+ *	port identifiers - they are only used for the task_get_special_port
+ *	and task_set_special_port routines.
+ *	
+ */
+
+#ifndef	_MACH_TASK_SPECIAL_PORTS_H_
+#define _MACH_TASK_SPECIAL_PORTS_H_
+
+#ifdef	MACH_KERNEL
+#include <mach_ipc_compat.h>
+#endif	/* MACH_KERNEL */
+
+#define TASK_KERNEL_PORT	1	/* Represents task to the outside
+					   world.*/
+#define TASK_EXCEPTION_PORT	3	/* Exception messages for task are
+					   sent to this port. */
+#define TASK_BOOTSTRAP_PORT	4	/* Bootstrap environment for task. */
+
+/*
+ *	Definitions for ease of use
+ */
+
+#define task_get_kernel_port(task, port)	\
+		(task_get_special_port((task), TASK_KERNEL_PORT, (port)))
+
+#define task_set_kernel_port(task, port)	\
+		(task_set_special_port((task), TASK_KERNEL_PORT, (port)))
+
+#define task_get_exception_port(task, port)	\
+		(task_get_special_port((task), TASK_EXCEPTION_PORT, (port)))
+
+#define task_set_exception_port(task, port)	\
+		(task_set_special_port((task), TASK_EXCEPTION_PORT, (port)))
+
+#define task_get_bootstrap_port(task, port)	\
+		(task_get_special_port((task), TASK_BOOTSTRAP_PORT, (port)))
+
+#define task_set_bootstrap_port(task, port)	\
+		(task_set_special_port((task), TASK_BOOTSTRAP_PORT, (port)))
+
+
+/* Definitions for the old IPC interface. */
+
+#if	MACH_IPC_COMPAT
+
+#define TASK_NOTIFY_PORT	2	/* Task receives kernel IPC
+					   notifications here. */
+
+#define task_get_notify_port(task, port)	\
+		(task_get_special_port((task), TASK_NOTIFY_PORT, (port)))
+
+#define task_set_notify_port(task, port)	\
+		(task_set_special_port((task), TASK_NOTIFY_PORT, (port)))
+
+#endif	/* MACH_IPC_COMPAT */
+
+#endif	/* _MACH_TASK_SPECIAL_PORTS_H_ */