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[apple/xnu.git] / osfmk / kern / ipc_mig.h

/*
 * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code 
 * 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 
 * compliance with the License.  The rights granted to you under the 
 * License may not be used to create, or enable the creation or 
 * redistribution of, unlawful or unlicensed copies of an Apple operating 
 * system, or to circumvent, violate, or enable the circumvention or 
 * violation of, any terms of an Apple operating system software license 
 * agreement.
 *
 * 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 
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * Please see the License for the specific language governing rights and 
 * limitations under the License.
 *
 * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
 */
/*
 * @OSF_COPYRIGHT@
 */

#ifndef	_KERN_IPC_MIG_H_
#define	_KERN_IPC_MIG_H_

#include <mach/mig.h>
#include <mach/mach_types.h>
#include <mach/message.h>
#include <kern/kern_types.h>

#include <sys/cdefs.h>

#ifdef	XNU_KERNEL_PRIVATE

#include <sys/kdebug.h>

/*
 * Define the trace points for MIG-generated calls.  One traces the input parameters
 * to MIG called things, another traces the outputs, and one traces bad message IDs.
 */
#ifdef _MIG_TRACE_PARAMETERS_

#define __BeforeRcvCallTrace(msgid,arg1,arg2,arg3,arg4)				      \
	KERNEL_DEBUG_CONSTANT(KDBG_MIGCODE(msgid) | DBG_FUNC_START,		      \
			      (unsigned int)(arg1),				      \
			      (unsigned int)(arg2),				      \
			      (unsigned int)(arg3),				      \
			      (unsigned int)(arg4),				      \
			      (unsigned int)(0));

#define __AfterRcvCallTrace(msgid,arg1,arg2,arg3,arg4)				      \
	KERNEL_DEBUG_CONSTANT(KDBG_MIGCODE(msgid) | DBG_FUNC_END,		      \
			      (unsigned int)(arg1),				      \
			      (unsigned int)(arg2),				      \
			      (unsigned int)(arg3),				      \
			      (unsigned int)(arg4),				      \
			      (unsigned int)(0));

#define __BeforeSimpleCallTrace(msgid,arg1,arg2,arg3,arg4)			      \
	KERNEL_DEBUG_CONSTANT(KDBG_MIGCODE(msgid) | DBG_FUNC_START,		      \
			      (unsigned int)(arg1),				      \
			      (unsigned int)(arg2),				      \
			      (unsigned int)(arg3),				      \
			      (unsigned int)(arg4),				      \
			      (unsigned int)(0));

#define __AfterSimpleCallTrace(msgid,arg1,arg2,arg3,arg4)			      \
	KERNEL_DEBUG_CONSTANT(KDBG_MIGCODE(msgid) | DBG_FUNC_END,		      \
			      (unsigned int)(arg1),				      \
			      (unsigned int)(arg2),				      \
			      (unsigned int)(arg3),				      \
			      (unsigned int)(arg4),				      \
			      (unsigned int)(0));

#else /* !_MIG_TRACE_PARAMETERS_ */

#define	__BeforeRcvRpc(msgid, _NAME_)						      \
	KERNEL_DEBUG_CONSTANT(KDBG_MIGCODE(msgid) | DBG_FUNC_START,		      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0));

#define	__AfterRcvRpc(msgid, _NAME_)						      \
	KERNEL_DEBUG_CONSTANT(KDBG_MIGCODE(msgid) | DBG_FUNC_END,		      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0));


#define	__BeforeRcvSimple(msgid, _NAME_)					      \
	KERNEL_DEBUG_CONSTANT(KDBG_MIGCODE(msgid) | DBG_FUNC_START,		      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0));

#define	__AfterRcvSimple(msgid, _NAME_)						      \
	KERNEL_DEBUG_CONSTANT(KDBG_MIGCODE(msgid) | DBG_FUNC_END,		      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0));

#endif /* !_MIG_TRACE_PARAMETERS_ */

#define _MIG_MSGID_INVALID(msgid)						      \
	KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_MSGID_INVALID, (msgid)),          \
			      (unsigned int)(0),				      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0),				      \
			      (unsigned int)(0))

#endif	/* XNU_KERNEL_PRIVATE */

__BEGIN_DECLS

/* Send a message from the kernel */
extern mach_msg_return_t mach_msg_send_from_kernel(
	mach_msg_header_t	*msg,
	mach_msg_size_t		send_size);


extern mach_msg_return_t mach_msg_rpc_from_kernel(
	mach_msg_header_t	*msg,
	mach_msg_size_t		send_size,
	mach_msg_size_t		rcv_size);

__END_DECLS

#ifdef	MACH_KERNEL_PRIVATE

extern void mach_msg_receive_continue(void);

/* Initialize kernel server dispatch table */
extern void		mig_init(void);

/*
 * Kernel implementation of the MIG object base class
 *
 * Conforms to the MIGObjectInterface defined in <mach/mig.h>
 * Ports are automatically allocated for the duration of outstanding
 * cross-task references and then released.  
 */

typedef struct mig_object {
			const IMIGObjectVtbl	*pVtbl; /* our interface def */
			mach_port_t		port;	 /* our port pointer  */
} mig_object_data_t;


/*
 * MIG notify base class definition
 * These are chained off the mig object to which the are registered.
 * When that object triggers a notification delivery, we walk this
 * chain and deliver the appropriate notification.
 */
typedef struct mig_notify_object {
			const IMIGNotifyObjectVtbl *pVtbl; /* our interface def */
			mach_port_t		port;	 /* our port pointer  */
} mig_notify_object_data_t;

extern kern_return_t mig_object_init(
			mig_object_t		mig_object,
			const IMIGObject	*interface);

extern void mig_object_destroy(
			mig_object_t		mig_object);

extern void mig_object_reference(
			mig_object_t		mig_object);

extern void mig_object_deallocate(
			mig_object_t		mig_object);

extern ipc_port_t convert_mig_object_to_port(
			mig_object_t		mig_object);

extern mig_object_t convert_port_to_mig_object(
			ipc_port_t		port,
			const MIGIID		*iid);

boolean_t mig_object_no_senders(
			ipc_port_t		port,
			mach_port_mscount_t	mscount);

#endif  /* MACH_KERNEL_PRIVATE */

#endif	/* _KERN_IPC_MIG_H_ */