87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2023 George V. Neville-Neil
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/*
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* SKEL Loadable Kernel Module for the FreeBSD Operating System
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*
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* The SKEL module is meant to act as a skeleton for creating new
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* kernel modules.
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*
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* This module can be loaded and unloaded from * FreeBSD and is for
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* use in teaching as well.
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*
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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/*
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* Every module can have a module specific piece of code that is
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* executed whenever the module is loaded or unloaded. The following
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* is a trivial example that prints a message on the console whenever
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* the module is loaded or unloaded.
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*/
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static int
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skel_mod_event(module_t mod, int type, void *data)
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{
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switch (type) {
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case MOD_LOAD:
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printf("SKEL module loading.\n");
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return (0);
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case MOD_UNLOAD:
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printf("SKEL module unloading.\n");
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return (0);
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}
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return (EOPNOTSUPP);
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}
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/*
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* Modules can have associated data and the module data also contains
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* an entry for the function called by the kernel on load and unload.
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*/
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static moduledata_t skel_mod = {
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"skel",
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skel_mod_event,
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NULL,
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};
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/*
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* Each module is declared with its name and module data. The
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* ordering arguments at the end put this module into the device
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* driver class, which is sufficient for our needs. The complete list
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* of modules types and ording can be found in sys/kernel.h
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*/
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DECLARE_MODULE(skel, skel_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
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