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	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	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.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	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.
	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_ */