104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/* $NetBSD: lkminit_test.c,v 1.2 2008/03/28 20:28:27 ad Exp $ */
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/*
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* Copyright (c) 1993 Terrence R. Lambert.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Terrence R. Lambert.
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* 4. The name Terrence R. Lambert may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``AS IS'' AND ANY
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* 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 TERRENCE R. LAMBERT 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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* from NetBSD: lkminit_test.c,v 1.6 2005/12/11 12:24:49 christos Exp
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: lkminit_test.c,v 1.2 2008/03/28 20:28:27 ad Exp $");
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/mount.h>
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#include <sys/exec.h>
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#include <sys/lkm.h>
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#include <sys/file.h>
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#include <sys/errno.h>
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#include <sys/syscall.h>
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int testcall(struct lwp *, void *, register_t *);
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int LKMENTRY(struct lkm_table *lkmtp, int, int);
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int sys_lkmnosys(struct lwp *, const void *, register_t *);
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int testmod_handle(struct lkm_table *, int);
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static struct sysent newent = {
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0, 0, 0, (void *)testcall
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};
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static struct sysent oldent;
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MOD_MISC("testmod");
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int
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testmod_handle(struct lkm_table *lkmtp, int cmd)
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{
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struct lkm_misc *args = lkmtp->private.lkm_misc;
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int i, err = 0;
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switch( cmd) {
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case LKM_E_LOAD:
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if(lkmexists( lkmtp))
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return( EEXIST);
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for (i = 0; i < SYS_MAXSYSCALL; i++)
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if ((void *)sysent[i].sy_call == sys_lkmnosys)
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break;
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if (i == SYS_MAXSYSCALL) {
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err = ENFILE;
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break;
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}
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memcpy(&oldent, &sysent[i], sizeof(struct sysent));
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memcpy(&sysent[i], &newent, sizeof(struct sysent));
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args->mod.lkm_offset = i;
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break;
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case LKM_E_UNLOAD:
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i = args->mod.lkm_offset;
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memcpy(&sysent[i], &oldent, sizeof(struct sysent));
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break;
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default:
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err = EINVAL;
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break;
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}
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return err;
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}
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int
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LKMENTRY(struct lkm_table *lkmtp, int cmd, int ver)
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{
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DISPATCH(lkmtp,cmd,ver,testmod_handle,testmod_handle,lkm_nofunc)
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}
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