1/*
2 * Copyright (c) 1983, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30/*
31 * C library -- setjmp, longjmp
32 *
33 *	longjmp(a,v)
34 * will generate a "return(v)" from
35 * the last call to
36 *	setjmp(a)
37 * by restoring registers from the stack,
38 * and a struct sigcontext, see <signal.h>
39 */
40
41#include "DEFS.h"
42#include "assym.h"
43
44#if defined(LIBC_SCCS) && !defined(lint)
45	/* .asciz "@(#)setjmp.s	8.1 (Berkeley) 6/4/93" */
46RCSID("$NetBSD: __setjmp14.S,v 1.10 2005/05/03 04:37:33 matt Exp $")
47#endif /* LIBC_SCCS and not lint */
48
49ENTRY(__setjmp14, R6)
50	movl	4(%ap),%r2		# construct sigcontext
51	subl2	$12,%sp			# space for current struct sigstack
52	pushl	%sp			# get current values
53	pushl	$0			# no new values
54	calls	$4,_C_LABEL(__sigaltstack14) # pop args plus signal stack value
55	movl	4(%ap),%r2		# construct sigcontext
56	movl	(%sp)+,(%r2)		# save onsigstack status of caller
57	pushal	28(%r2)
58	pushl	$0
59	pushl	$0
60	calls	$3,_C_LABEL(__sigprocmask14) # get signal mask
61	addl3	$8,4(%ap),%r2		# point to sp in signal context
62	clrl	%r0			# assume no stack arguments
63	bbc	$13,6(%fp),1f		# handle callg
64	addl3	$1,(%ap),%r0		# get argument count +1 if calls
651:	moval	24(%fp)[%r0],(%r2)+	# save sp of caller
66	movl	12(%fp),(%r2)+		# save frame pointer of caller
67	movl	8(%fp),(%r2)+		# save argument pointer of caller
68	movl	16(%fp),(%r2)+		# save pc of caller
69	movpsl	(%r2)			# save current psl
70	movw	4(%fp),(%r2)		# save psw of caller
71	addl3	$SC_LEN,4(%ap),%r2	# point to past signal context
72	movq	%r6,(%r2)+		# save r6/r7
73	movq	%r8,(%r2)+		# save r8/r9
74	movq	%r10,(%r2)+		# save r10/r11
75	clrl	%r0
76	ret
77END(__setjmp14)
78