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/* 25 May 93*/
/*
* newsyscall.c
*
* 05 Jun 93 Terry Lambert Split mycall.c out
* 25 May 93 Terry Lambert Original
*
* Copyright (c) 1993 Terrence R. Lambert.
* All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Terrence R. Lambert.
* 4. The name Terrence R. Lambert may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``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 TERRENCE R. LAMBERT 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.
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/exec.h>
#include <sys/sysent.h>
#include <sys/lkm.h>
/* XXX this should be in a header. */
extern int mycall __P((struct proc *p, void *uap));
/* XXX these should be generated by MOD_SYSCALL(). */
static int newsyscall_load __P((struct lkm_table *lkmtp, int cmd));
extern int newsyscall_mod __P((struct lkm_table *lkmtp, int cmd, int ver));
/*
* These two entries define our system call and module information. We
* have 0 arguments to our system call.
*/
static struct sysent newent = {
0, mycall /* # of args, function pointer*/
};
MOD_SYSCALL(newsyscall_mod, -1, &newent);
/*
* This function is called each time the module is loaded. Technically,
* we could have made this "lkm_nullcmd" in the "MOD_DISPATCH" in
* "newsyscall()", but it's a convenient place to kick a copyright out
* to the console.
*/
static int
newsyscall_load( lkmtp, cmd)
struct lkm_table *lkmtp;
int cmd;
{
if( cmd == LKM_E_LOAD) { /* print copyright on console*/
printf( "\nSample Loaded system call\n");
printf( "Copyright (c) 1993\n");
printf( "Terrence R. Lambert\n");
printf( "All rights reserved\n");
}
return( 0);
}
/*
* External entry point; should generally match name of .o file. The
* arguments are always the same for all loaded modules. The "load",
* "unload", and "stat" functions in "MOD_DISPATCH" will be called under
* their respective circumstances unless their value is "lkm_nullcmd". If
* called, they are called with the same arguments (cmd is included to
* allow the use of a single function, ver is included for version
* matching between modules and the kernel loader for the modules).
*
* Since we expect to link in the kernel and add external symbols to
* the kernel symbol name space in a future version, generally all
* functions used in the implementation of a particular module should
* be static unless they are expected to be seen in other modules or
* to resolve unresolved symbols alread existing in the kernel (the
* second case is not likely to ever occur).
*
* The entry point should return 0 unless it is refusing load (in which
* case it should return an errno from errno.h).
*/
int
newsyscall_mod( lkmtp, cmd, ver)
struct lkm_table *lkmtp;
int cmd;
int ver;
{
MOD_DISPATCH(newsyscall_mod, lkmtp, cmd, ver,
newsyscall_load, lkm_nullcmd, lkm_nullcmd)
}
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