.\" Copyright (c) 2000 Alexander Langer .\" .\" All rights reserved. .\" .\" This program is free software. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. .\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, .\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, .\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" .\" $FreeBSD: src/share/man/man9/DECLARE_MODULE.9,v 1.2.2.3 2001/12/17 11:30:18 ru Exp $ .\" .Dd March 3, 2001 .Dt DECLARE_MODULE 9 .Os .Sh NAME .Nm DECLARE_MODULE .Nd kernel module declaration macro .Sh SYNOPSIS .In sys/module.h .Fn DECLARE_MODULE "name" "moduledata_t data" "sub" "order" .Sh DESCRIPTION The .Fn DECLARE_MODULE macro declares a generic kernel module. It is used to register the module with the system, using the .Fn SYSINIT macro. .Fn DECLARE_MODULE is usually used within other macros, such as .Xr DRIVER_MODULE 9 , .Xr DEV_MODULE 9 and .Xr SYSCALL_MODULE 9 . However, it can be called directly of course, for example in order to implement dynamic sysctls. .Pp The arguments to .Fn DECLARE_MODULE : .Pp .Fa name is the name of the module, which will be used in the .Fn SYSINIT call to identify the module. .Pp .Fa data is a pointer to the .Vt moduledata_t structure, which contains two main items, the official name of the module, which will be used in the .Vt module structure and a pointer to the event handler function of type .Vt modeventhand_t . .Pp .Fa sub is an argument directed to the .Fn SYSINIT macro. Valid values for this are contained in the .Vt sysstem_sub_id enumeration (see .In sys/kernel.h ) and specify the type of system startup interfaces. The .Xr DRIVER_MODULE 9 macro uses a value of .Dv SI_SUB_DRIVERS here for example, since these modules contain a driver for a device. For kernel modules that are loaded at runtime, a value of .Dv SI_SUB_EXEC is common. .Pp The .Fa order value is another argument for .Fn SYSINIT . It represents the KLDs order of initialization within the subsystem. Valid values are defined in the .Vt sysinit_elem_order enumeration (see .In sys/kernel.h ) . .Sh SEE ALSO .Xr DEV_MODULE 9 , .Xr DRIVER_MODULE 9 , .Xr module 9 , .Xr SYSCALL_MODULE 9 .Pp .In sys/kernel.h , .Pa /usr/share/examples/kld .Sh AUTHORS .An -nosplit This manual page was written by .An Alexander Langer Aq Mt alex@FreeBSD.org , inspired by the KLD Facility Programming Tutorial by .An Andrew Reiter Aq Mt arr@watson.org .