signalsphandler.S revision 1.3 
1/*	$NetBSD: signalsphandler.S,v 1.3 2025/05/07 16:26:47 uwe Exp $	*/
2
3/*-
4 * Copyright (c) 2025 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#define	_LOCORE
30
31#include <machine/asm.h>
32
33RCSID("$NetBSD: signalsphandler.S,v 1.3 2025/05/07 16:26:47 uwe Exp $")
34
35/*
36 * signalsphandler(signo@r0)
37 *
38 *	Signal handler.  Store the stack pointer on entry at the global
39 *	variable signalsp and return.
40 */
41ENTRY(signalsphandler)
420:	GOT_INIT(r0, .Lgot)
43	mov	r1, sp
44	GOT_GET(r2, r0, .Lsignalsp)
45	str	r1, [r2]
46	RET
47
48	GOT_INITSYM(.Lgot, 0b)
49.Lsignalsp:
50	.word	GOT_SYM(signalsp)
51END(signalsphandler)
52