bsd/sys/sysent.h

   1 /*
   2  * Copyright (c) 2004-2014 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_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 License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #ifndef _SYS_SYSENT_H_
  30 #define _SYS_SYSENT_H_
  31
  32 #include <sys/appleapiopts.h>
  33 #include <sys/cdefs.h>
  34
  35 #ifdef KERNEL_PRIVATE
  36 #ifdef __APPLE_API_PRIVATE
  37
  38 typedef int32_t sy_call_t(struct proc *, void *, int *);
  39 #if CONFIG_REQUIRES_U32_MUNGING
  40 typedef void    sy_munge_t(void *);
  41 #elif __arm__ && (__BIGGEST_ALIGNMENT__ > 4)
  42 typedef int     sy_munge_t(const void *, void *);
  43 #endif
  44
  45 struct sysent {         /* system call table */
  46         sy_call_t       *sy_call;       /* implementing function */
  47 #if CONFIG_REQUIRES_U32_MUNGING || (__arm__ && (__BIGGEST_ALIGNMENT__ > 4))
  48         sy_munge_t      *sy_arg_munge32; /* system call arguments munger for 32-bit process */
  49 #endif
  50         int32_t         sy_return_type; /* system call return types */
  51         int16_t         sy_narg;        /* number of args */
  52         uint16_t        sy_arg_bytes;   /* Total size of arguments in bytes for
  53                                          * 32-bit system calls
  54                                          */
  55 };
  56
  57 #ifndef __INIT_SYSENT_C__
  58 extern struct sysent sysent[];
  59 #endif  /* __INIT_SYSENT_C__ */
  60
  61 extern unsigned int nsysent;
  62
  63 /*
  64  * Valid values for sy_cancel
  65  */
  66 #define _SYSCALL_CANCEL_NONE    0               /* Not a cancellation point */
  67 #define _SYSCALL_CANCEL_PRE             1               /* Canbe cancelled on entry itself */
  68 #define _SYSCALL_CANCEL_POST    2               /* Can only be cancelled after syscall is run */
  69
  70 /*
  71  * Valid values for sy_return_type
  72  */
  73 #define _SYSCALL_RET_NONE               0
  74 #define _SYSCALL_RET_INT_T              1
  75 #define _SYSCALL_RET_UINT_T             2
  76 #define _SYSCALL_RET_OFF_T              3
  77 #define _SYSCALL_RET_ADDR_T             4
  78 #define _SYSCALL_RET_SIZE_T             5
  79 #define _SYSCALL_RET_SSIZE_T    6
  80 #define _SYSCALL_RET_UINT64_T   7
  81
  82 #endif /* __APPLE_API_PRIVATE */
  83 #endif /* KERNEL_PRIVATE */
  84
  85 #endif /* !_SYS_SYSENT_H_ */