1/*	$NetBSD: setjmp.S,v 1.3 2023/10/11 09:12:20 skrll Exp $	*/
2
3/*
4 * Copyright (c) 1994, 1995 Carnegie-Mellon University.
5 * All rights reserved.
6 *
7 * Author: Chris G. Demetriou
8 *
9 * Permission to use, copy, modify and distribute this software and
10 * its documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation.
14 *
15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 *
19 * Carnegie Mellon requests users of this software to return to
20 *
21 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
22 *  School of Computer Science
23 *  Carnegie Mellon University
24 *  Pittsburgh PA 15213-3890
25 *
26 * any improvements or extensions that they make and grant Carnegie the
27 * rights to redistribute these changes.
28 */
29
30#define _LOCORE
31#include <machine/asm.h>
32
33RCSID("$NetBSD: setjmp.S,v 1.3 2023/10/11 09:12:20 skrll Exp $")
34
35#include    <machine/setjmp.h>
36
37/*
38 * C library -- setjmp, longjmp
39 *
40 *	longjmp(a,v)
41 * will generate a "return(v)" from
42 * the last call to
43 *	setjmp(a)
44 * by restoring registers from the stack,
45 * and the previous signal state.
46 */
47
48ENTRY(__setjmp14, 1)
49	alloc	loc0=ar.pfs,1,2,3,0
50	mov	loc1=rp
51	;;
52	mov	out0=0				// how is ignored
53	mov	out1=0				// set = NULL
54	add	out2=J_SIGSET,in0		// oset = &jb[J_SIGSET]
55	br.call.sptk.few rp=_sys___sigprocmask14
56	;;
57	mov	rp=loc1
58	mov	r14=loc0
59	;;
60	alloc	r15=ar.pfs,1,0,0,0		// drop register frame
61	;;
62	mov	ar.pfs=r14			// restore ar.pfs
63	br.sptk.many _setjmp			// finish saving state
64END(__setjmp14)
65
66ENTRY(__longjmp14, 2)
67	alloc	loc0=ar.pfs,2,2,3,0
68	mov	loc1=rp
69	;;
70	mov	out0=3				// how = SIG_SETMASK
71	add	out1=J_SIGSET,in0		// set = &jb[J_SIGSET]
72	mov	out2=0				// oset = NULL
73	br.call.sptk.few rp=_sys___sigprocmask14
74	;;
75	mov	rp=loc1
76	mov	r14=loc0
77	;;
78	alloc	r15=ar.pfs,2,0,0,0		// drop register frame
79	;;
80	mov	ar.pfs=r14			// restore ar.pfs
81	br.sptk.many _longjmp			// finish restoring state
82END(__longjmp14)
83