87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
/*-
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* Copyright (c) 1999 Assar Westerlund
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* All rights reserved.
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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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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/module.h>
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#include <sys/sysent.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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/*
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* The function for implementing the syscall.
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*/
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static int
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hello (struct thread *td, void *arg)
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{
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printf ("hello kernel\n");
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return 0;
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}
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/*
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* The `sysent' for the new syscall
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*/
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static struct sysent hello_sysent = {
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0, /* sy_narg */
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hello /* sy_call */
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};
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/*
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* The offset in sysent where the syscall is allocated.
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*/
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static int offset = NO_SYSCALL;
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/*
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* The function called at load/unload.
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*/
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static int
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load (struct module *module, int cmd, void *arg)
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{
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int error = 0;
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switch (cmd) {
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case MOD_LOAD :
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printf ("syscall loaded at %d\n", offset);
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break;
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case MOD_UNLOAD :
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printf ("syscall unloaded from %d\n", offset);
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break;
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default :
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error = EINVAL;
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break;
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}
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return error;
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}
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SYSCALL_MODULE(syscall, &offset, &hello_sysent, load, NULL);
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