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

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This 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 OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * @OSF_COPYRIGHT@
 */
/* 
 * 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.
 */
/*
 */

#ifndef	_KERN_SYSCALL_EMULATION_H_
#define	_KERN_SYSCALL_EMULATION_H_

#ifndef	ASSEMBLER
#include <kern/kern_types.h>
#include <mach/machine/vm_types.h>
#include <kern/lock.h>

typedef	vm_offset_t	eml_routine_t;

typedef struct eml_dispatch {
	decl_mutex_data(,lock)		/* lock for reference count */
	int		ref_count;	/* reference count */
	int 		disp_count; 	/* count of entries in vector */
	int		disp_min;	/* index of lowest entry in vector */
	eml_routine_t	disp_vector[1];	/* first entry in array of dispatch */
					/* routines (array has disp_count
					   elements) */
} *eml_dispatch_t;

#define EML_ROUTINE_NULL	(eml_routine_t)0
#define EML_DISPATCH_NULL	(eml_dispatch_t)0

#define	EML_SUCCESS		(0)

#define	EML_MOD			(err_kern|err_sub(2))
#define	EML_BAD_TASK		(EML_MOD|0x0001)
#define	EML_BAD_CNT		(EML_MOD|0x0002)

/* Per-task initialization */
extern void	eml_init(void);

/* Take reference on common task emulation vector */
extern void	eml_task_reference(
			task_t	new_task,
			task_t	parent_task);

/* Deallocate reference on common task emulation vector */
extern void	eml_task_deallocate(
			task_t	task);

#endif	/* ASSEMBLER */

#endif	/* _KERN_SYSCALL_EMULATION_H_ */
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
de355530 A	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
1c79356b	11	*
de355530 A	12	* This Original Code and all software distributed under the License are
de355530 A	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
de355530 A	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
1c79356b A	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/*
	23	* @OSF_COPYRIGHT@
	24	*/
	25	/*
	26	* Mach Operating System
	27	* Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
	28	* All Rights Reserved.
	29	*
	30	* Permission to use, copy, modify and distribute this software and its
	31	* documentation is hereby granted, provided that both the copyright
	32	* notice and this permission notice appear in all copies of the
	33	* software, derivative works or modified versions, and any portions
	34	* thereof, and that both notices appear in supporting documentation.
	35	*
	36	* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
	37	* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
	38	* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
	39	*
	40	* Carnegie Mellon requests users of this software to return to
	41	*
	42	* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
	43	* School of Computer Science
	44	* Carnegie Mellon University
	45	* Pittsburgh PA 15213-3890
	46	*
	47	* any improvements or extensions that they make and grant Carnegie Mellon
	48	* the rights to redistribute these changes.
	49	*/
	50	/*
	51	*/
	52
	53	#ifndef _KERN_SYSCALL_EMULATION_H_
	54	#define _KERN_SYSCALL_EMULATION_H_
	55
	56	#ifndef ASSEMBLER
	57	#include <kern/kern_types.h>
	58	#include <mach/machine/vm_types.h>
	59	#include <kern/lock.h>
	60
	61	typedef vm_offset_t eml_routine_t;
	62
	63	typedef struct eml_dispatch {
	64	decl_mutex_data(,lock) /* lock for reference count */
	65	int ref_count; /* reference count */
	66	int disp_count; /* count of entries in vector */
	67	int disp_min; /* index of lowest entry in vector */
	68	eml_routine_t disp_vector[1]; /* first entry in array of dispatch */
	69	/* routines (array has disp_count
	70	elements) */
	71	} *eml_dispatch_t;
	72
	73	#define EML_ROUTINE_NULL (eml_routine_t)0
	74	#define EML_DISPATCH_NULL (eml_dispatch_t)0
	75
	76	#define EML_SUCCESS (0)
	77
	78	#define EML_MOD (err_kern\|err_sub(2))
	79	#define EML_BAD_TASK (EML_MOD\|0x0001)
	80	#define EML_BAD_CNT (EML_MOD\|0x0002)
	81
	82	/* Per-task initialization */
83	extern void eml_init(void);
84
85	/* Take reference on common task emulation vector */
86	extern void eml_task_reference(
87	task_t new_task,
88	task_t parent_task);
89
90	/* Deallocate reference on common task emulation vector */
91	extern void eml_task_deallocate(
92	task_t task);
93
94	#endif /* ASSEMBLER */
95
96	#endif /* _KERN_SYSCALL_EMULATION_H_ */