bsd/sys/sysent.h

   1 /*
   2  * Copyright (c) 2004 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 #ifndef _SYS_SYSENT_H_
  24 #define _SYS_SYSENT_H_
  25
  26 #include <sys/appleapiopts.h>
  27 #include <sys/cdefs.h>
  28 #ifdef __ppc__
  29 #include <sys/types.h>
  30 #endif
  31
  32 #ifdef KERNEL_PRIVATE
  33 #ifdef __APPLE_API_PRIVATE
  34
  35 typedef int32_t sy_call_t(struct proc *, void *, int *);
  36 typedef void    sy_munge_t(const void *, void *);
  37
  38 extern struct sysent {          /* system call table */
  39         int16_t         sy_narg;        /* number of args */
  40         int8_t          sy_cancel;      /* funnel type */
  41         int8_t          sy_funnel;      /* funnel type */
  42         sy_call_t       *sy_call;       /* implementing function */
  43         sy_munge_t      *sy_arg_munge32; /* system call aguments munger for 32-bit process */
  44         sy_munge_t      *sy_arg_munge64; /* system call aguments munger for 64-bit process */
  45         int32_t         sy_return_type; /* system call return types */
  46 } sysent[];
  47
  48 /* sy_funnel flags bits */
  49 #define FUNNEL_MASK     0x00ff
  50 #define UNSAFE_64BIT    0x0100
  51
  52 /*
  53  * Valid values for sy_cancel
  54  */
  55 #define _SYSCALL_CANCEL_NONE    0               /* Not a cancellation point */
  56 #define _SYSCALL_CANCEL_PRE             1               /* Canbe cancelled on entry itself */
  57 #define _SYSCALL_CANCEL_POST    2               /* Can only be cancelled after syscall is run */
  58
  59 /*
  60  * Valid values for sy_return_type
  61  */
  62 #define _SYSCALL_RET_NONE               0
  63 #define _SYSCALL_RET_INT_T              1
  64 #define _SYSCALL_RET_UINT_T             2
  65 #define _SYSCALL_RET_OFF_T              3
  66 #define _SYSCALL_RET_ADDR_T             4
  67 #define _SYSCALL_RET_SIZE_T             5
  68 #define _SYSCALL_RET_SSIZE_T    6
  69
  70 extern int nsysent;
  71
  72 #endif /* __APPLE_API_PRIVATE */
  73 #endif /* KERNEL_PRIVATE */
  74
  75 #endif /* !_SYS_SYSENT_H_ */