xref: /src/sys/kern/kern_stub.c

/*	$NetBSD: kern_stub.c,v 1.1.4.2 2007/02/26 09:11:11 yamt Exp $	*/

/*-
 * Copyright (c) 2007 The NetBSD Foundation, Inc.
 * 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 the NetBSD
 *	Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``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 FOUNDATION OR CONTRIBUTORS
 * 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.
 */

/*
 * Stubs for system calls and facilities not included in the system.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_stub.c,v 1.1.4.2 2007/02/26 09:11:11 yamt Exp $");

#include "opt_ptrace.h"

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/signalvar.h>
#include <sys/syscallargs.h>

/*
 * Nonexistent system call-- signal process (may want to handle it).  Flag
 * error in case process won't see signal immediately (blocked or ignored).
 */
#ifndef PTRACE
__weak_alias(sys_ptrace, sys_nosys);
#endif

/*
 * Scheduler activations system calls.  These need to remain until libc's
 * major version is bumped.
 */
__strong_alias(sys_sa_register, sys_nosys);
__strong_alias(sys_sa_stacks, sys_nosys);
__strong_alias(sys_sa_enable, sys_nosys);
__strong_alias(sys_sa_setconcurrency, sys_nosys);
__strong_alias(sys_sa_yield, sys_nosys);
__strong_alias(sys_sa_preempt, sys_nosys);
__strong_alias(sys_sa_unblockyield, sys_nosys);

/* ARGSUSED */
int
sys_nosys(struct lwp *l, void *v, register_t *retval)
{

	mutex_enter(&proclist_mutex);
	psignal(l->l_proc, SIGSYS);
	mutex_exit(&proclist_mutex);
	return ENOSYS;
}