1.\" -*- nroff -*- 2.\" 3.\" Copyright (c) 2001 Alexander Langer 4.\" 5.\" All rights reserved. 6.\" 7.\" This program is free software. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 19.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 22.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28.\" 29.\" $FreeBSD: src/share/man/man9/SYSCALL_MODULE.9,v 1.2.2.2 2001/12/17 11:30:18 ru Exp $ 30.\" $DragonFly: src/share/man/man9/SYSCALL_MODULE.9,v 1.2 2003/06/17 04:37:01 dillon Exp $ 31.\" 32.Dd April 27, 2001 33.Dt SYSCALL_MODULE 9 34.Os 35.Sh NAME 36.Nm SYSCALL_MODULE 37.Nd syscall kernel module declaration macro 38.Sh SYNOPSIS 39.In sys/proc.h 40.In sys/module.h 41.In sys/sysent.h 42.Fn SYSCALL_MODULE name "int *offset" "struct sysent new_sysent" "modeventhand_t evh" "void *arg" 43.Sh DESCRIPTION 44The 45.Fn SYSCALL_MODULE 46macro declares a new syscall. 47.Fn SYSCALL_MODULE 48expands into a kernel module declaration named as 49.Fa name . 50.Pp 51.Fa offset 52is a pointer to an 53.Vt int 54which saves the offset in 55.Vt "struct sysent" 56where the 57syscall is allocated. 58.Pp 59.Fa new_sysent 60specifies the function implementing the syscall and the number of 61arguments this function needs (see 62.Aq Pa sys/sysent.h ) . 63.Pp 64.Fa evh 65is a pointer to the kernel module event handler function with the argument 66.Fa arg . 67Please refer to 68.Xr module 9 69for more information. 70.Sh EXAMPLES 71A minimal example for a syscall module can be found in 72.Pa /usr/share/examples/kld/syscall/module/syscall.c . 73.Sh SEE ALSO 74.Xr module 9 75.Pp 76.Pa /usr/share/examples/kld/syscall/module/syscall.c 77.Sh AUTHORS 78This manual page was written by 79.An Alexander Langer Aq alex@FreeBSD.org . 80