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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2023 George V. Neville-Neil
*
* 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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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.
*
*/
/*
* SKEL Loadable Kernel Module for the FreeBSD Operating System
*
* The SKEL module is meant to act as a skeleton for creating new
* kernel modules.
*
* This module can be loaded and unloaded from * FreeBSD and is for
* use in teaching as well.
*
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/module.h>
/*
* Every module can have a module specific piece of code that is
* executed whenever the module is loaded or unloaded. The following
* is a trivial example that prints a message on the console whenever
* the module is loaded or unloaded.
*/
static int
skel_mod_event(module_t mod, int type, void *data)
{
switch (type) {
case MOD_LOAD:
printf("SKEL module loading.\n");
return (0);
case MOD_UNLOAD:
printf("SKEL module unloading.\n");
return (0);
}
return (EOPNOTSUPP);
}
/*
* Modules can have associated data and the module data also contains
* an entry for the function called by the kernel on load and unload.
*/
static moduledata_t skel_mod = {
"skel",
skel_mod_event,
NULL,
};
/*
* Each module is declared with its name and module data. The
* ordering arguments at the end put this module into the device
* driver class, which is sufficient for our needs. The complete list
* of modules types and ording can be found in sys/kernel.h
*/
DECLARE_MODULE(skel, skel_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
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