_setjmp.S revision 249553 
11558Srgrimes/*-
274531Sru * Copyright (c) 1991, 1993
31558Srgrimes *	The Regents of the University of California.  All rights reserved.
477042Sru *
577042Sru * This code is derived from software contributed to Berkeley by
677042Sru * Ralph Campbell.
71558Srgrimes *
81558Srgrimes * Redistribution and use in source and binary forms, with or without
977031Sru * modification, are permitted provided that the following conditions
101558Srgrimes * are met:
111558Srgrimes * 1. Redistributions of source code must retain the above copyright
121558Srgrimes *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * $FreeBSD: head/lib/libstand/mips/_setjmp.S 249553 2013-04-16 17:03:35Z rwatson $
37 */
38
39#include <machine/regnum.h>
40#include <machine/asm.h>
41
42#if 0
43#if defined(LIBC_SCCS)
44	.text
45	.asciz "$OpenBSD: _setjmp.S,v 1.6 1996/09/23 21:27:53 imp Exp $"
46#endif /* LIBC_SCCS */
47#endif
48
49/*
50 * C library -- _setjmp, _longjmp
51 *
52 *	_longjmp(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 * The previous signal state is NOT restored.
58 */
59
60LEAF(_setjmp)
61	.set	noreorder
62	REG_LI	v0, 0xACEDBADE			# sigcontext magic number
63	REG_S	ra, (2 * SZREG)(a0)		# sc_pc = return address
64	REG_S	v0, (3 * SZREG)(a0)		#   saved in sc_regs[0]
65	REG_S	s0, ((S0 + 3) * SZREG)(a0)
66	REG_S	s1, ((S1 + 3) * SZREG)(a0)
67	REG_S	s2, ((S2 + 3) * SZREG)(a0)
68	REG_S	s3, ((S3 + 3) * SZREG)(a0)
69	REG_S	s4, ((S4 + 3) * SZREG)(a0)
70	REG_S	s5, ((S5 + 3) * SZREG)(a0)
71	REG_S	s6, ((S6 + 3) * SZREG)(a0)
72	REG_S	s7, ((S7 + 3) * SZREG)(a0)
73	REG_S	sp, ((SP + 3) * SZREG)(a0)
74	REG_S	s8, ((S8 + 3) * SZREG)(a0)
75	REG_S	v0, ((32 + 38) * SZREG)(a0)
76	j	ra
77	move	v0, zero
78END(_setjmp)
79
80LEAF(_longjmp)
81#ifdef ABICALLS
82	subu	sp, sp, 32
83	.cprestore 16
84#endif
85	.set    noreorder
86	REG_L	v0, (3 * SZREG)(a0)		# get magic number
87	REG_L	ra, (2 * SZREG)(a0)
88	bne	v0, 0xACEDBADE, botch		# jump if error
89
90	addu	sp, sp, 32			# does not matter, sanity
91	REG_L	s0, ((S0 + 3) * SZREG)(a0)
92	REG_L	s1, ((S1 + 3) * SZREG)(a0)
93	REG_L	s2, ((S2 + 3) * SZREG)(a0)
94	REG_L	s3, ((S3 + 3) * SZREG)(a0)
95	REG_L	s4, ((S4 + 3) * SZREG)(a0)
96	REG_L	s5, ((S5 + 3) * SZREG)(a0)
97	REG_L	s6, ((S6 + 3) * SZREG)(a0)
98	REG_L	s7, ((S7 + 3) * SZREG)(a0)
99	REG_L	v0, ((32 + 38) * SZREG)(a0)	# get fpu status
100	REG_L	sp, ((SP + 3) * SZREG)(a0)
101	REG_L	s8, ((S8 + 3) * SZREG)(a0)
102
103	j	ra
104	move	v0, a1
105botch:
106	jal	_C_LABEL(longjmperror)
107	nop
108	jal	_C_LABEL(abort)
109	nop
110END(_longjmp)
111