bsd/sys/sysent.h

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30
  31 #ifndef _SYS_SYSENT_H_
  32 #define _SYS_SYSENT_H_
  33
  34 #include <sys/appleapiopts.h>
  35 #include <sys/cdefs.h>
  36 #ifdef __ppc__
  37 #include <sys/types.h>
  38 #endif
  39
  40 #ifdef KERNEL_PRIVATE
  41 #ifdef __APPLE_API_PRIVATE
  42
  43 typedef int32_t sy_call_t(struct proc *, void *, int *);
  44 typedef void    sy_munge_t(const void *, void *);
  45
  46 extern struct sysent {          /* system call table */
  47         int16_t         sy_narg;        /* number of args */
  48         int8_t          sy_cancel;      /* funnel type */
  49         int8_t          sy_funnel;      /* funnel type */
  50         sy_call_t       *sy_call;       /* implementing function */
  51         sy_munge_t      *sy_arg_munge32; /* system call aguments munger for 32-bit process */
  52         sy_munge_t      *sy_arg_munge64; /* system call aguments munger for 64-bit process */
  53         int32_t         sy_return_type; /* system call return types */
  54 } sysent[];
  55
  56 /* sy_funnel flags bits */
  57 #define FUNNEL_MASK     0x00ff
  58 #define UNSAFE_64BIT    0x0100
  59
  60 /*
  61  * Valid values for sy_cancel
  62  */
  63 #define _SYSCALL_CANCEL_NONE    0               /* Not a cancellation point */
  64 #define _SYSCALL_CANCEL_PRE             1               /* Canbe cancelled on entry itself */
  65 #define _SYSCALL_CANCEL_POST    2               /* Can only be cancelled after syscall is run */
  66
  67 /*
  68  * Valid values for sy_return_type
  69  */
  70 #define _SYSCALL_RET_NONE               0
  71 #define _SYSCALL_RET_INT_T              1
  72 #define _SYSCALL_RET_UINT_T             2
  73 #define _SYSCALL_RET_OFF_T              3
  74 #define _SYSCALL_RET_ADDR_T             4
  75 #define _SYSCALL_RET_SIZE_T             5
  76 #define _SYSCALL_RET_SSIZE_T    6
  77
  78 extern int nsysent;
  79
  80 #endif /* __APPLE_API_PRIVATE */
  81 #endif /* KERNEL_PRIVATE */
  82
  83 #endif /* !_SYS_SYSENT_H_ */