1.\" Copyright (c) 2001 Alexander Langer 2.\" 3.\" All rights reserved. 4.\" 5.\" This program is free software. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 17.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 20.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26.\" 27.\" $FreeBSD: src/share/man/man9/SYSCALL_MODULE.9,v 1.2.2.2 2001/12/17 11:30:18 ru Exp $ 28.\" $DragonFly: src/share/man/man9/SYSCALL_MODULE.9,v 1.4 2006/05/26 19:39:40 swildner Exp $ 29.\" 30.Dd April 27, 2001 31.Dt SYSCALL_MODULE 9 32.Os 33.Sh NAME 34.Nm SYSCALL_MODULE 35.Nd syscall kernel module declaration macro 36.Sh SYNOPSIS 37.In sys/proc.h 38.In sys/module.h 39.In sys/sysent.h 40.Fn SYSCALL_MODULE name "int *offset" "struct sysent new_sysent" "modeventhand_t evh" "void *arg" 41.Sh DESCRIPTION 42The 43.Fn SYSCALL_MODULE 44macro declares a new syscall. 45.Fn SYSCALL_MODULE 46expands into a kernel module declaration named as 47.Fa name . 48.Pp 49.Fa offset 50is a pointer to an 51.Vt int 52which saves the offset in 53.Vt "struct sysent" 54where the 55syscall is allocated. 56.Pp 57.Fa new_sysent 58specifies the function implementing the syscall and the number of 59arguments this function needs (see 60.In sys/sysent.h ) . 61.Pp 62.Fa evh 63is a pointer to the kernel module event handler function with the argument 64.Fa arg . 65Please refer to 66.Xr module 9 67for more information. 68.Sh EXAMPLES 69A minimal example for a syscall module can be found in 70.Pa /usr/share/examples/kld/syscall/module/syscall.c . 71.Sh SEE ALSO 72.Xr module 9 73.Pp 74.Pa /usr/share/examples/kld/syscall/module/syscall.c 75.Sh AUTHORS 76This manual page was written by 77.An Alexander Langer Aq alex@FreeBSD.org . 78