/*	$NetBSD: signalsphandler.S,v 1.2 2025/04/27 16:49:54 riastradh Exp $	*/

/*-
 * Copyright (c) 2025 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.
 *
 * 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.
 */

#define	_LOCORE

#include <machine/asm.h>

RCSID("$NetBSD: signalsphandler.S,v 1.2 2025/04/27 16:49:54 riastradh Exp $")

#include "SYS.h"

	.text

/*
 * signalsphandler(signo@a0)
 *
 *	Signal handler.  Store the stack pointer on entry at the global
 *	variable signalsp and return.
 */
LEAF(signalsphandler)
	PIC_PROLOGUE(signalsphandler)	/* gp setup, sets t3 */

	PTR_LA	t1, _C_LABEL(signalsp)	/* load t1 := &signalsp */
	 NOP_L				/* load hazard */
	PTR_S	sp, 0(t1)		/* store signalsp := stack pointer */

	PIC_RETURN()
END(signalsphandler)