xnu-6153.121.1.tar.gz

[apple/xnu.git] / osfmk / mach / mach_port.defs

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 * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
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 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
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/*
 * @OSF_FREE_COPYRIGHT@
 */
/* 
 * Mach Operating System
 * Copyright (c) 1991,1990,1989 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/mach_port.defs
 *	Author:	Rich Draves
 *
 *	Exported kernel calls.
 */

subsystem
#if	KERNEL_SERVER
	  KernelServer
#endif	/* KERNEL_SERVER */
	  mach_port 3200;

#if !KERNEL && !LIBSYSCALL_INTERFACE
	UserPrefix _kernelrpc_;
#endif

#include <mach/std_types.defs>
#include <mach/mach_types.defs>
#include <mach_debug/mach_debug_types.defs>

type kobject_description_t = c_string[*:512];

/*
 *	Returns the set of port and port set names
 *	to which the target task has access, along with
 *	the type (set or port) for each name.
 */

routine mach_port_names(
		task		: ipc_space_t;
	out	names		: mach_port_name_array_t;
	out	types		: mach_port_type_array_t);

/*
 *	Returns the type (set or port) for the port name
 *	within the target task.  Also indicates whether
 *	there is a dead-name request for the name.
 */

routine mach_port_type(
		task		: ipc_space_t;
		name		: mach_port_name_t;
	out	ptype		: mach_port_type_t);

/*
 *	Changes the name by which a port (or port set) is known to
 *	the target task.  The new name can't be in use.  The
 *	old name becomes available for recycling.
 *
 *	This interface is OBSOLETE and will always
 *	return KERN_NOT_SUPPORTED.
 */

routine mach_port_rename(
		task		: ipc_space_t;
		old_name	: mach_port_name_t;
		new_name	: mach_port_name_t);

/*
 *	Allocates the specified kind of object, with the given name.
 *	The right must be one of
 *		MACH_PORT_RIGHT_RECEIVE
 *		MACH_PORT_RIGHT_PORT_SET
 *		MACH_PORT_RIGHT_DEAD_NAME
 *	New port sets are empty.  New ports don't have any
 *	send/send-once rights or queued messages.  The make-send
 *	count is zero and their queue limit is MACH_PORT_QLIMIT_DEFAULT.
 *	New sets, ports, and dead names have one user reference.
 */

routine mach_port_allocate_name(
		task		: ipc_space_t;
		right		: mach_port_right_t;
		name		: mach_port_name_t);

/*
 *	Allocates the specified kind of object.
 *	The right must be one of
 *		MACH_PORT_RIGHT_RECEIVE
 *		MACH_PORT_RIGHT_PORT_SET
 *		MACH_PORT_RIGHT_DEAD_NAME
 *	Like port_allocate_name, but the kernel picks a name.
 *	It can use any name not associated with a right.
 */

routine mach_port_allocate(
		task		: ipc_space_t;
		right		: mach_port_right_t;
	out	name		: mach_port_name_t);

/*
 *	Destroys all rights associated with the name and makes it
 *	available for recycling immediately.  The name can be a
 *	port (possibly with multiple user refs), a port set, or
 *	a dead name (again, with multiple user refs).
 */

routine mach_port_destroy(
		task		: ipc_space_t;
		name		: mach_port_name_t);

/*
 *	Releases one send/send-once/dead-name user ref.
 *	Just like mach_port_mod_refs -1, but deduces the
 *	correct type of right.  This allows a user task
 *	to release a ref for a port without worrying
 *	about whether the port has died or not.
 */

routine mach_port_deallocate(
		task		: ipc_space_t;
		name		: mach_port_name_t);

/*
 *	A port set always has one user ref.
 *	A send-once right always has one user ref.
 *	A dead name always has one or more user refs.
 *	A send right always has one or more user refs.
 *	A receive right always has one user ref.
 *	The right must be one of
 *		MACH_PORT_RIGHT_RECEIVE
 *		MACH_PORT_RIGHT_PORT_SET
 *		MACH_PORT_RIGHT_DEAD_NAME
 *		MACH_PORT_RIGHT_SEND
 *		MACH_PORT_RIGHT_SEND_ONCE
 */

routine mach_port_get_refs(
		task		: ipc_space_t;
		name		: mach_port_name_t;
		right		: mach_port_right_t;
	out	refs		: mach_port_urefs_t);

/*
 *	The delta is a signed change to the task's
 *	user ref count for the right.  Only dead names
 *	and send rights can have a positive delta.
 *	The resulting user ref count can't be negative.
 *	If it is zero, the right is deallocated.
 *	If the name isn't a composite right, it becomes
 *	available for recycling.  The right must be one of
 *		MACH_PORT_RIGHT_RECEIVE
 *		MACH_PORT_RIGHT_PORT_SET
 *		MACH_PORT_RIGHT_DEAD_NAME
 *		MACH_PORT_RIGHT_SEND
 *		MACH_PORT_RIGHT_SEND_ONCE
 */

routine mach_port_mod_refs(
		task		: ipc_space_t;
		name		: mach_port_name_t;
		right		: mach_port_right_t;
		delta		: mach_port_delta_t);

/*
 *	Peek at the message queue for the specified receive
 *	right and return info about the message with the
 *	sequence number matching the input.  If zero is
 *	specified as the seqno, the first message in the
 *	queue will be peeked.
 *
 *	Only the following trailer types are currently supported:
 *	     MACH_RCV_TRAILER_TYPE(MACH_MSG_TRAILER_FORMAT_0)
 *
 *		or'ed with one of these element types:
 *	     MACH_RCV_TRAILER_ELEMENTS(MACH_RCV_TRAILER_NULL)
 *	     MACH_RCV_TRAILER_ELEMENTS(MACH_RCV_TRAILER_SEQNO)
 *	     MACH_RCV_TRAILER_ELEMENTS(MACH_RCV_TRAILER_SENDER)
 *	     MACH_RCV_TRAILER_ELEMENTS(MACH_RCV_TRAILER_AUDIT)
 */
routine mach_port_peek(
		task		: ipc_space_t;
		name		: mach_port_name_t;
		trailer_type	: mach_msg_trailer_type_t;
 inout		request_seqnop	: mach_port_seqno_t;
 out		msg_sizep	: mach_msg_size_t;
 out		msg_idp		: mach_msg_id_t;
 out		trailer_infop	: mach_msg_trailer_info_t, CountInOut);		

/*
 *	Only valid for receive rights.
 *	Sets the make-send count for the port.
 */
routine mach_port_set_mscount(
		task		: ipc_space_t;
		name		: mach_port_name_t;
		mscount		: mach_port_mscount_t);

/*
 *	Only valid for port sets.  Returns a list of
 *	the members.
 */

routine mach_port_get_set_status(
		task		: ipc_space_inspect_t;
		name		: mach_port_name_t;
	out	members		: mach_port_name_array_t);

/*
 *	Puts the member port (the task must have receive rights)
 *	into the after port set.  If the port is already a member
 *	of any set(s), it is atomically removed from those sets as
 *	part of this operation.  (If after is MACH_PORT_NULL, the
 *	port is still removed from all current sets).
 */

routine mach_port_move_member(
		task		: ipc_space_t;
		member		: mach_port_name_t;
		after		: mach_port_name_t);

/*
 *	Requests a notification from the kernel.  The request
 *	must supply the send-once right which is used for
 *	the notification.  If a send-once right was previously
 *	registered, it is returned.  The msgid must be one of:
 *		MACH_NOTIFY_PORT_DESTROYED (receive rights)
 *		MACH_NOTIFY_DEAD_NAME (send/receive/send-once rights)
 *		MACH_NOTIFY_SEND_POSSIBLE (send/receive/send-once rights)
 *		MACH_NOTIFY_NO_SENDERS (receive rights)
 *
 *	The sync value specifies whether a notification should
 *	get sent immediately, if appropriate.  The exact meaning
 *	depends on the notification:
 *		MACH_NOTIFY_PORT_DESTROYED: must be zero.
 *		MACH_NOTIFY_DEAD_NAME: if non-zero, then name can be dead,
 *			and the notification gets sent immediately.
 *			If zero, then name can't be dead.
 *		MACH_NOTIFY_SEND_POSSIBLE: if non-zero, will generate a	send-
 *			possible notification as soon as it is possible to send
 *			to the port. If zero, will generate a send-possible
 *			notification only after a subsequent failed send
 *			(with MACH_SEND_NOTIFY option to mach_msg call).  Can
 *			generate a dead-name notification if name is already dead
 *			or becomes dead before a send-possible notification fires.
 *		MACH_NOTIFY_NO_SENDERS: the notification gets sent
 *			immediately if the current mscount is greater
 *			than or equal to the sync value and there are no
 *			extant send rights.
 *
 * If the name is deleted before a successfully registered notification
 * is delivered, it is replaced with a port-deleted notification.
 */

routine mach_port_request_notification(
		task		: ipc_space_t;
		name		: mach_port_name_t;
		msgid		: mach_msg_id_t;
		sync		: mach_port_mscount_t;
		notify		: mach_port_send_once_t;
	out	previous	: mach_port_move_send_once_t);

/*
 *	Inserts the specified rights into the target task,
 *	using the specified name.  If inserting send/receive
 *	rights and the task already has send/receive rights
 *	for the port, then the names must agree.  In any case,
 *	the task gains a user ref for the port.
 */

routine mach_port_insert_right(
		task		: ipc_space_t;
		name		: mach_port_name_t;
		poly		: mach_port_poly_t);

/*
 *	Returns the specified right for the named port
 *	in the target task, extracting that right from
 *	the target task.  The target task loses a user
 *	ref and the name may be available for recycling.
 *	msgt_name must be one of
 *		MACH_MSG_TYPE_MOVE_RECEIVE
 *		MACH_MSG_TYPE_COPY_SEND
 *		MACH_MSG_TYPE_MAKE_SEND
 *		MACH_MSG_TYPE_MOVE_SEND
 *		MACH_MSG_TYPE_MAKE_SEND_ONCE
 *		MACH_MSG_TYPE_MOVE_SEND_ONCE
 */

routine mach_port_extract_right(
		task		: ipc_space_t;
		name		: mach_port_name_t;
		msgt_name	: mach_msg_type_name_t;
	out	poly		: mach_port_poly_t);

/*
 *	Only valid for receive rights.
 *	Sets the sequence number for the port.
 */

routine mach_port_set_seqno(
		task		: ipc_space_t;
		name		: mach_port_name_t;
		seqno		: mach_port_seqno_t);

/*
 *      Returns information about a port.
 */

routine mach_port_get_attributes(
		task		: ipc_space_inspect_t;
		name		: mach_port_name_t;
		flavor		: mach_port_flavor_t;
	out	port_info_out	: mach_port_info_t, CountInOut);

/*
 *      Set attributes of a port
 */

routine mach_port_set_attributes(
		task		: ipc_space_t;
		name		: mach_port_name_t;
		flavor		: mach_port_flavor_t;
		port_info	: mach_port_info_t);


/*
 *	Allocates the specified kind of object, qos version.
 *	The right must be
 *		MACH_PORT_RIGHT_RECEIVE
 *	Like port_allocate_name, but the kernel picks a name.
 *	It can use any name not associated with a right.
 */

routine mach_port_allocate_qos(
		task		: ipc_space_t;
		right		: mach_port_right_t;
	inout	qos		: mach_port_qos_t;
	out	name		: mach_port_name_t);


/*
 *	Generic interface to allocation various kinds of ports.
 *	Should never be called directly by users (at least not
 *	unless they are exceedingly masochistic).
 */

routine mach_port_allocate_full(
		task		: ipc_space_t;
		right		: mach_port_right_t;
		proto		: mach_port_t;
	inout	qos		: mach_port_qos_t;
	inout	name		: mach_port_name_t);


/*
 *	Pre-expand task port name space.
 */
routine task_set_port_space(
		task		: ipc_space_t;
		table_entries	: int);


/*
 *	Returns the exact number of extant send rights
 *	for the given receive right.
 *      This call is only valid on MACH_IPC_DEBUG kernels.
 *      Otherwise, KERN_FAILURE is returned.
 */
routine	mach_port_get_srights(
		task		: ipc_space_t;
		name		: mach_port_name_t;
	out	srights		: mach_port_rights_t);


/*
 *	Returns information about an IPC space.
 *      This call is only valid on MACH_IPC_DEBUG kernels.
 *      Otherwise, KERN_FAILURE is returned.
 */
routine mach_port_space_info(
		task		: ipc_space_inspect_t;
	out	space_info	: ipc_info_space_t;
	out	table_info	: ipc_info_name_array_t;
	out	tree_info	: ipc_info_tree_name_array_t);

/*
 *	Returns information about the dead-name requests
 *	registered with the named receive right.
 *      This call is only valid on MACH_IPC_DEBUG kernels.
 *      Otherwise, KERN_FAILURE is returned.
 */
routine mach_port_dnrequest_info(
		task		: ipc_space_t;
		name		: mach_port_name_t;
	out	dnr_total	: unsigned;	/* total size of table */
	out	dnr_used	: unsigned);	/* amount used */

/*
 *	Return the type and address of the kernel object
 *	that the given send/receive right represents.
 *      This call is only valid on MACH_IPC_DEBUG kernels.
 *      Otherwise, KERN_FAILURE is returned.
 *
 *	This interface is DEPRECATED in favor of the new
 *	mach_port_kernel_object64() call (see below).
 */
routine	mach_port_kernel_object(
		task		: ipc_space_inspect_t;
		name		: mach_port_name_t;
	out	object_type	: unsigned;
	out	object_addr	: unsigned);


/*
 *	Inserts the specified rights into the portset identified
 *	by the <task, pset> pair.  The results of passing in the
 *	Poly argument via the supplied disposition must yield a
 *	receive right.
 *
 *	If the <task,pset> pair does not represent a valid portset
 *	KERN_INVALID_RIGHT is returned.
 *	
 *	If the passed in name argument does not represent a receive
 *	right, KERN_INVALID_CAPABILITY will be returned.
 *
 *	If the port represented by the receive right is already in
 *	the portset, KERN_ALREADY_IN_SET is returned.
 */
routine mach_port_insert_member(
		task		: ipc_space_t;
		name		: mach_port_name_t;
		pset		: mach_port_name_t);

/*
 *	Extracts the specified right from the named portset
 *	in the target task.  
 *	the target task.  The target task loses a user
 *	ref and the name may be available for recycling.
 *	msgt_name must be one of
 *		MACH_MSG_TYPE_MOVE_RECEIVE
 *		MACH_MSG_TYPE_COPY_SEND
 *		MACH_MSG_TYPE_MAKE_SEND
 *		MACH_MSG_TYPE_MOVE_SEND
 *		MACH_MSG_TYPE_MAKE_SEND_ONCE
 *		MACH_MSG_TYPE_MOVE_SEND_ONCE
 */

routine mach_port_extract_member(
		task		: ipc_space_t;
		name		: mach_port_name_t;
		pset		: mach_port_name_t);

/*
 * Only valid for receive rights.
 * Gets the context pointer for the port.
 */

routine mach_port_get_context(
		task		: ipc_space_inspect_t;
		name		: mach_port_name_t;
#ifdef LIBSYSCALL_INTERFACE
	out context		: mach_port_context_t
#else
	out context		: mach_vm_address_t
#endif
	);

/*
 * Only valid for receive rights.
 * Sets the context pointer for the port.
 */

routine mach_port_set_context(
		task		: ipc_space_t;
		name		: mach_port_name_t;
#ifdef LIBSYSCALL_INTERFACE
		context		: mach_port_context_t
#else
		context		: mach_vm_address_t
#endif
		);

/*
 *	Return the type and address of the kernel object
 *	that the given send/receive right represents.
 *      This call is only valid on MACH_IPC_DEBUG kernels.
 *      Otherwise, KERN_FAILURE is returned.
 */
routine	mach_port_kobject(
		task		: ipc_space_inspect_t;
		name		: mach_port_name_t;
	out	object_type	: natural_t;
	out	object_addr	: mach_vm_address_t);


/*
 *	Constructs a right based on the options passed
 *	in. Also allows guarding the port as one of the
 *	options if the requested right is a receive
 *	right.
 */
routine mach_port_construct(
		task		: ipc_space_t;
		options		: mach_port_options_ptr_t;
#ifdef LIBSYSCALL_INTERFACE
		context		: mach_port_context_t;
#else
		context		: uint64_t;
#endif
	out	name		: mach_port_name_t);

/*
 *	Destroys a mach port using the guard provided
 *	for guarded ports. Also reduces the user ref
 *	count for send rights as specified by srdelta.
 */
routine mach_port_destruct(
		task		: ipc_space_t;
		name		: mach_port_name_t;
		srdelta		: mach_port_delta_t;
#ifdef LIBSYSCALL_INTERFACE
		guard		: mach_port_context_t
#else
		guard		: uint64_t
#endif		
		);

/*
 *	Guard an already existing port. Allows guarding
 *	receive rights only. Uses the context field in the
 *	port structure to store the guard.
 */
routine mach_port_guard(
		task		: ipc_space_t;
		name		: mach_port_name_t;
#ifdef LIBSYSCALL_INTERFACE
		guard		: mach_port_context_t;
#else
		guard		: uint64_t;
#endif	
		strict		: boolean_t);

/*
 *	Unguard a port guarded previously. For unguarded ports
 *	or incorrect guards passed in it raises an exception
 *	indicating guarding misbehavior.
 */
routine mach_port_unguard(
		task		: ipc_space_t;
		name		: mach_port_name_t;
#ifdef LIBSYSCALL_INTERFACE
		guard		: mach_port_context_t
#else
		guard		: uint64_t
#endif	
		);

/*
 *	Returns basic information about an IPC space.
 *      This call is only valid on MACH_IPC_DEBUG kernels.
 *      Otherwise, KERN_FAILURE is returned.
 */
routine mach_port_space_basic_info(
		task		: ipc_space_inspect_t;
	out	basic_info	: ipc_info_space_basic_t);

#if KERNEL || !LIBSYSCALL_INTERFACE
/*
 *	Returns sync ipc turnstile link status
 *	for special reply ports.
 */
routine mach_port_special_reply_port_reset_link(
		task            : ipc_space_t;
		name            : mach_port_name_t;
	out	srp_lost_link	: boolean_t);
#else
skip;
#endif

/*
 *	Guard an already existing port. Allows guarding
 *	receive rights only. Uses the context field in the
 *	port structure to store the guard.
 */
routine mach_port_guard_with_flags(
		task		: ipc_space_t;
		name		: mach_port_name_t;
#ifdef LIBSYSCALL_INTERFACE
		guard		: mach_port_context_t;
#else
		guard		: uint64_t;
#endif
		flags		: uint64_t);

/*
 *	Swap guard value of an existing guarded port. Works
 *	only if it is not a strict guard.
 */
routine mach_port_swap_guard(
		task		: ipc_space_t;
		name		: mach_port_name_t;
#ifdef LIBSYSCALL_INTERFACE
		old_guard	: mach_port_context_t;
#else
		old_guard	: uint64_t;
#endif

#ifdef LIBSYSCALL_INTERFACE
		new_guard	: mach_port_context_t);
#else
		new_guard	: uint64_t);
#endif

/*
 *	Return the type and address of the kernel object
 *	that the given send/receive right represents.
 *      This call is only valid on MACH_IPC_DEBUG kernels.
 *      Otherwise, KERN_FAILURE is returned.
 */
routine	mach_port_kobject_description(
		task		: ipc_space_inspect_t;
		name		: mach_port_name_t;
	out	object_type	: natural_t;
	out	object_addr	: mach_vm_address_t;
	out     description     : kobject_description_t);

/* vim: set ft=c : */