osfmk/kern/syscall_emulation.h

   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_ */