NetBSD/sys/lkm/compat/linux/lkminit_linux.c

/* $NetBSD: lkminit_linux.c,v 1.3 1996/10/22 19:32:08 explorer Exp $ */

/*
 * Copyright (C) Michael Graff, 1996.
 * 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 for NetBSD by Michael Graff.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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/ioctl.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/mount.h>
#include <sys/exec.h>
#include <sys/exec_elf.h>
#include <sys/lkm.h>
#include <sys/file.h>
#include <sys/errno.h>

#include <machine/cpu.h>
#include <machine/reg.h>

#include <compat/linux/linux_exec.h>

extern int exec_linux_aout_makecmds();
extern struct emul *emul_linux_elf;
extern struct emul *emul_linux_aout;
extern struct emul _emul_linux_elf;
extern struct emul _emul_linux_aout;

struct execsw linux_lkm_execsw = {
  LINUX_AOUT_HDR_SIZE, exec_linux_aout_makecmds,
};

/*
 * declare the filesystem
 */
MOD_EXEC("compat_linux", -1, &linux_lkm_execsw);

/*
 * entry point
 */
int
compat_linux_lkmentry(lkmtp, cmd, ver)
	struct lkm_table *lkmtp;	
	int cmd;
	int ver;
{
	DISPATCH(lkmtp, cmd, ver,
		 compat_linux_lkmload,
		 compat_linux_lkmunload,
		 lkm_nofunc);
}

int
compat_linux_lkmload(lkmtp, cmd)
	struct lkm_table *lkmtp;	
	int cmd;
{
	if (elf_probe_funcs_insert(linux_elf32_probe))
		return 1;  /* Failure! */
	emul_linux_aout = &_emul_linux_aout;
	emul_linux_elf = &_emul_linux_elf;

	return 0;
}

/*
 * Note that it is NOT safe to unload this at all...
 */
int
compat_linux_lkmunload(lkmtp, cmd)
	struct lkm_table *lkmtp;	
	int cmd;
{
	if (elf_probe_funcs_insert(linux_elf32_probe))
		return 1;  /* Failure! */
	emul_linux_aout = NULL;
	emul_linux_elf = NULL;

	return 0;
}