sys/sys/syscallvar.h

   1 /*      $NetBSD: syscallvar.h,v 1.4 2008/11/19 18:36:10 ad Exp $        */
   2
   3 /*-
   4  * Copyright (c) 2008 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software developed for The NetBSD Foundation
   8  * by Andrew Doran.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #ifndef _SYS_SYSCALLVAR_H_
  33 #define _SYS_SYSCALLVAR_H_
  34
  35 #ifndef _KERNEL
  36 #error nothing of interest to userspace here
  37 #endif
  38
  39 #include <sys/systm.h>
  40 #include <sys/proc.h>
  41
  42 extern struct emul emul_netbsd;
  43
  44 struct syscall_package {
  45         u_short         sp_code;
  46         u_short         sp_flags;
  47         sy_call_t       *sp_call;
  48 };
  49
  50 void    syscall_init(void);
  51 int     syscall_establish(const struct emul *, const struct syscall_package *);
  52 int     syscall_disestablish(const struct emul *, const struct syscall_package *);
  53
  54 static inline int
  55 sy_call(const struct sysent *sy, struct lwp *l, const void *uap,
  56         register_t *rval)
  57 {
  58         int error;
  59
  60         l->l_sysent = sy;
  61         error = (*sy->sy_call)(l, uap, rval);
  62         l->l_sysent = NULL;
  63
  64         return error;
  65 }
  66
  67 /* inclusion in the kernel currently depends on SYSCALL_DEBUG */
  68 extern const char * const syscallnames[];
  69
  70 #endif  /* _SYS_SYSCALLVAR_H_ */