FreeBSD/Linux Kernel Cross Reference
sys/kern/syscall_emulation.h

     /* 
      * Mach Operating System
      * Copyright (c) 1993,1992,1991,1990,1989,1988,1987 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.
     */
    /*
     * HISTORY
     * $Log:        syscall_emulation.h,v $
     * Revision 2.10  93/11/17  17:25:50  dbg
     *      Added ANSI function prototypes.  Removed user-visible
     *      definitions.
     *      [93/06/16            dbg]
     * 
     * Revision 2.9  92/05/21  17:16:01  jfriedl
     *      Removed comment starter from within comments to shut up gcc warnings.
     *      [92/05/16            jfriedl]
     * 
     * Revision 2.8  92/03/31  15:18:00  rpd
     *      Removed EML_OFFSET.
     *      [92/03/20            rpd]
     * 
     * Revision 2.7  92/01/03  20:17:50  dbg
     *      Remove fixed lower bound.  Fix type declaration for
     *      eml_routine_t.  Remove syscall_val structure.
     *      [91/10/31            dbg]
     * 
     * Revision 2.6  91/06/25  10:29:22  rpd
     *      Fixed includes to avoid circularities.
     *      [91/06/24            rpd]
     * 
     * Revision 2.5  91/06/06  17:07:37  jsb
     *      Added emulation_vector_t for new get/set emulation vector calls.
     *      [91/05/24  17:47:38  jsb]
     * 
     * Revision 2.4  91/05/14  16:47:16  mrt
     *      Correcting copyright
     * 
     * Revision 2.3  91/02/05  17:29:30  mrt
     *      Changed to new Mach copyright
     *      [91/02/01  16:18:04  mrt]
     * 
     * Revision 2.2  90/09/09  14:32:52  rpd
     *      Use decl_simple_lock_data.
     *      [90/08/30            rpd]
     * 
     *      Allow emulation of syscalls with negative numbers.  Clobber MACH
     *      system calls at your own risk!
     *      [89/04/19            dbg]
     * 
     * Revision 2.1  89/08/03  15:54:14  rwd
     * Created.
     * 
     * Revision 2.2  88/08/03  15:34:07  dorr
     * Get rid of errno and eosys fields.  Use return value and
     * special return code of ERESTART to represent same information.
     * 
     * 15-Jul-88  David Golub (dbg) at Carnegie-Mellon University
     *      Added lock for reference count.
     *
     * 26-Jan-88  Douglas Orr (dorr) at Carnegie-Mellon University
     *      Added maxsyscall variable and typedefs for user space emulation library
     *
     */ 
    
    #ifndef _KERN_SYSCALL_EMULATION_H_
    #define _KERN_SYSCALL_EMULATION_H_
    
    #ifndef ASSEMBLER
    #include <mach/kern_return.h>
    #include <mach/machine/vm_types.h>
    #include <kern/kern_types.h>
    #include <kern/lock.h>
    
    typedef vm_offset_t     eml_routine_t;
    
    typedef struct eml_dispatch {
            decl_simple_lock_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;
   
   typedef vm_offset_t     *emulation_vector_t; /* Variable-length array */
   
   #define EML_ROUTINE_NULL        (eml_routine_t)0
   #define EML_DISPATCH_NULL       (eml_dispatch_t)0
   
   extern void     eml_init(void);
   extern void     eml_task_reference(task_t task, task_t parent);
   extern void     eml_task_deallocate(task_t);
   
   extern kern_return_t    task_set_emulation_vector(
                   task_t          task,
                   int             vector_start,
                   emulation_vector_t emulation_vector,
                   natural_t       count);
   
   extern kern_return_t    task_get_emulation_vector(
                   task_t          task,
                   int             *vector_start,
                   emulation_vector_t *emulation_vector,
                   natural_t       *count);
   
   #endif  /* ASSEMBLER */
   
   #endif  /* _KERN_SYSCALL_EMULATION_H_ */

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