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.\" $FreeBSD$ 30.\" 31.Dd April 27, 2001 32.Dt SYSCALL_MODULE 9 33.Os 34.Sh NAME 35.Nm SYSCALL_MODULE 36.Nd syscall kernel module declaration macro 37.Sh SYNOPSIS 38.In sys/param.h 39.In sys/kernel.h 40.In sys/proc.h 41.In sys/module.h 42.In sys/sysent.h 43.Fn SYSCALL_MODULE name "int *offset" "struct sysent new_sysent" "modeventhand_t evh" "void *arg" 44.Sh DESCRIPTION 45The 46.Fn SYSCALL_MODULE 47macro declares a new syscall. 48.Fn SYSCALL_MODULE 49expands into a kernel module declaration named as 50.Fa name . 51.Pp 52.Fa offset 53is a pointer to an 54.Vt int 55which saves the offset in 56.Vt "struct sysent" 57where the 58syscall is allocated. 59.Pp 60.Fa new_sysent 61specifies the function implementing the syscall and the number of 62arguments this function needs (see 63.Aq Pa sys/sysent.h ) . 64.Pp 65.Fa evh 66is a pointer to the kernel module event handler function with the argument 67.Fa arg . 68Please refer to 69.Xr module 9 70for more information. 71.Sh EXAMPLES 72A minimal example for a syscall module can be found in 73.Pa /usr/share/examples/kld/syscall/module/syscall.c . 74.Sh SEE ALSO 75.Xr module 9 76.Pp 77.Pa /usr/share/examples/kld/syscall/module/syscall.c 78.Sh AUTHORS 79This manual page was written by 80.An Alexander Langer Aq alex@FreeBSD.org . 81