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Initial revision

/*	$OpenBSD: sigcode.s,v 1.3 2003/06/02 23:27:48 millert Exp $	*/
/*	$NetBSD: sigcode.s,v 1.2 1997/04/25 02:22:03 thorpej Exp $	*/

/*
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1980, 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department.
 *
 * 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. Neither the name of the University 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 REGENTS 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 REGENTS 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.
 *
 * from: Utah $Hdr: locore.s 1.66 92/12/22$
 *
 *	@(#)locore.s	8.6 (Berkeley) 5/27/94
 */

/*
 * NOTICE: This is not a standalone file.  To use it, #include it in
 * your port's locore.s, like so:
 *
 *	#include <m68k/m68k/sigcode.s>
 */

/*
 * Signal "trampoline" code (18 bytes).  Invoked from RTE setup by sendsig().
 *
 * Stack looks like:
 *
 *	sp+0	->	signal number
 *	sp+4		signal specific code
 *	sp+8		pointer to signal context frame (scp)
 *	sp+12		address of handler
 *	sp+16		saved hardware state
 *				.
 *				.
 *				.
 *	scp+0	->	beginning of signal context frame
 */

	.data
	.align	2
GLOBAL(sigcode)
	movl	sp@(12),a0	| signal handler addr	(4 bytes)
	jsr	a0@		| call signal handler	(2 bytes)
	addql	#4,sp		| pop signal number	(2 bytes)
GLOBAL(sigcodetrap)
	trap	#1		| special syscall entry	(2 bytes)
	movl	d0,sp@(4)	| save errno		(4 bytes)
	moveq	#SYS_exit,d0	| syscall == exit	(2 bytes)
	trap	#0		| exit(errno)		(2 bytes)
	.align	2
GLOBAL(esigcode)