1/*	$NetBSD: setjmp.S,v 1.8 2011/04/27 21:08:48 martin Exp $	*/
2
3/*
4 * Copyright (c) 1992, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * from: Header: setjmp.s,v 1.2 92/06/25 03:18:43 torek Exp
36 */
37
38#define _LOCORE
39#include <machine/asm.h>
40#include <machine/frame.h>
41#if defined(LIBC_SCCS) && !defined(lint)
42#if 0
43	.asciz "@(#)setjmp.s	8.1 (Berkeley) 6/4/93"
44#else
45	RCSID("$NetBSD: setjmp.S,v 1.8 2011/04/27 21:08:48 martin Exp $")
46#endif
47#endif /* LIBC_SCCS and not lint */
48
49/*
50 * C library -- setjmp
51 *
52 *	__longjmp14(a,v)
53 * will generate a "return(v)" from
54 * the last call to
55 *	setjmp(a)
56 * by restoring registers from the stack,
57 * and a struct sigcontext, see <signal.h>
58 */
59
60#include "SYS.h"
61
62	.register %g2,#ignore
63	.register %g3,#ignore
64	.register %g6,#ignore
65
66ENTRY(__setjmp14)
67	save	%sp, -CC64FSZ, %sp
68
69	/* save globals into locals */
70	mov	%g1, %l1
71	mov	%g2, %l2
72	mov	%g3, %l3
73	mov	%g4, %l4
74	mov	%g5, %l5
75	mov	%g6, %l6
76	mov	%g7, %l7
77
78#ifdef PIC
79	PIC_PROLOGUE(%i1, %o4)
80#endif
81
82	/* now get sigmask and onstack flag */
83	add	%i0, 0x38, %o2		/* build sigcontext in [%o2]->sc.sc_mask */
84	mov	1, %o0			/* SIG_BLOCK */
85					/* sigprocmask(SIG_BLOCK, (sigset_t *)NULL, (sigset_t *)a) */
86#ifdef PIC
87#ifdef BIGPIC
88	set	_C_LABEL(__sigprocmask14), %o4
89	ldx	[%i1 + %o4], %g2
90#else
91	ldx	[%i1 + _C_LABEL(__sigprocmask14)], %g2
92#endif
93	call	%g2
94#else
95	call	_C_LABEL(__sigprocmask14)
96#endif
97	 clr	%o1
98
99	clr	%o0			/* sigstack(NULL, &foo) */
100#ifdef PIC
101#ifdef BIGPIC
102	set	_C_LABEL(__sigaltstack14), %o4
103	ldx	[%i1 + %o4], %g2
104#else
105	ldx	[%i1 + _C_LABEL(__sigaltstack14)], %g2
106#endif
107	call	%g2
108#else
109	call	_C_LABEL(__sigaltstack14)
110#endif
111	 add	%i0, 8, %o1		/* (foo being part of the sigcontext we're overwriting) */
112
113	lduw	[%i0 + 8 + 0x10], %o0	/* foo.ss_flags */
114	and	%o0, 1, %o1		/* onstack = foo.ss_flags & SS_ONSTACK; */
115	st	%o1, [%i0 + 0x00]	/* sc.sc_onstack = current onstack; */
116
117	/* store essential state */
118	stx	%fp, [%i0 + 0x08]	/* sc.sc_sp = sp */
119	add	%i7, 8, %o0
120	stx	%o0, [%i0 + 0x10]	/* sc.sc_pc = return_pc */
121	stx	%g0, [%i0 + 0x20]	/* sc.sc_tstate = (clean ccr) */
122	stx	%l1, [%i0 + 0x28]	/* sc.sc_g1 */
123	stx	%l2, [%i0 + 0x30]	/* sc.sc_o0, set in longjmp, use as %g2 */
124	/* 0x38: 4x32bit */		/* sc.sc_mask was already saved above */
125
126	/* save additional registers needed to fill a complete mcontext */
127	stx	%l3, [%i0 + 0x48]	/* adjust asserts in longjmp.c */
128	stx	%l6, [%i0 + 0x50]	/* if you change any of these */
129	stx	%l7, [%i0 + 0x58]	/* offsets! */
130
131	ret				/* return 0 */
132	 restore %g0, 0, %o0
133