__longjmp14.c revision 1.1 
1/*	$NetBSD: __longjmp14.c,v 1.1 2004/03/21 18:19:52 matt Exp $	*/
2
3/*-
4 * Copyright (c) 2003 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christian Limpach and Matt Thomas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *        This product includes software developed by the NetBSD
21 *        Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39#include "namespace.h"
40#include <sys/types.h>
41#include <ucontext.h>
42#include <signal.h>
43#include <stdlib.h>
44#include <string.h>
45#include <machine/reg.h>
46
47#define __LIBC12_SOURCE__
48#include <setjmp.h>
49
50struct _jmp_buf {
51	struct sigcontext jb_sc;
52	register_t jb_regs[6];
53};
54
55void
56__longjmp14(jmp_buf env, int val)
57{
58	struct _jmp_buf *jb = (void *)env;
59	ucontext_t uc;
60
61	/* Ensure non-zero SP */
62	if (jb->jb_sc.sc_sp == 0)
63		goto err;
64
65	/* Ensure non-zero return value */
66	if (val == 0)
67		val = -1;
68
69	/* Set _UC_SIGMASK and _UC_CPU */
70	uc.uc_flags = _UC_SIGMASK | _UC_CPU;
71
72	/* Clear uc_link */
73	uc.uc_link = 0;
74
75	/* Save return value in context */
76	uc.uc_mcontext.__gregs[_REG_R0] = val;
77
78	/* Copy saved registers */
79        uc.uc_mcontext.__gregs[_REG_AP] = jb->jb_sc.sc_ap;
80        uc.uc_mcontext.__gregs[_REG_SP] = jb->jb_sc.sc_sp;
81        uc.uc_mcontext.__gregs[_REG_FP] = jb->jb_sc.sc_fp;
82        uc.uc_mcontext.__gregs[_REG_PC] = jb->jb_sc.sc_pc;
83        uc.uc_mcontext.__gregs[_REG_PSL] = jb->jb_sc.sc_ps;
84
85        uc.uc_mcontext.__gregs[_REG_R6] = jb->jb_regs[0];
86        uc.uc_mcontext.__gregs[_REG_R7] = jb->jb_regs[1];
87        uc.uc_mcontext.__gregs[_REG_R8] = jb->jb_regs[2];
88        uc.uc_mcontext.__gregs[_REG_R9] = jb->jb_regs[3];
89        uc.uc_mcontext.__gregs[_REG_R10] = jb->jb_regs[4];
90        uc.uc_mcontext.__gregs[_REG_R11] = jb->jb_regs[5];
91
92	/* Copy signal mask */
93	uc.uc_sigmask = jb->jb_sc.sc_mask;
94
95	setcontext(&uc);
96 err:
97	longjmperror();
98	abort();
99	/* NOTREACHED */
100}
101