1 /* $NetBSD: __longjmp14.c,v 1.4 2008/04/28 20:22:57 martin 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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include "namespace.h"
33 #include <sys/types.h>
34 #include <ucontext.h>
35 #include <signal.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <machine/reg.h>
39
40 #define __LIBC12_SOURCE__
41 #include <setjmp.h>
42 #include <compat/include/setjmp.h>
43
44 struct _jmp_buf {
45 struct sigcontext jb_sc;
46 register_t jb_regs[6];
47 };
48
49 void
__longjmp14(jmp_buf env,int val)50 __longjmp14(jmp_buf env, int val)
51 {
52 struct _jmp_buf *jb = (void *)env;
53 ucontext_t uc;
54
55 /* Ensure non-zero SP */
56 if (jb->jb_sc.sc_sp == 0)
57 goto err;
58
59 /* Ensure non-zero return value */
60 if (val == 0)
61 val = -1;
62
63 /* Set _UC_SIGMASK and _UC_CPU */
64 uc.uc_flags = _UC_SIGMASK | _UC_CPU;
65
66 /* Clear uc_link */
67 uc.uc_link = 0;
68
69 /* Save return value in context */
70 uc.uc_mcontext.__gregs[_REG_R0] = val;
71
72 /* Copy saved registers */
73 uc.uc_mcontext.__gregs[_REG_AP] = jb->jb_sc.sc_ap;
74 uc.uc_mcontext.__gregs[_REG_SP] = jb->jb_sc.sc_sp;
75 uc.uc_mcontext.__gregs[_REG_FP] = jb->jb_sc.sc_fp;
76 uc.uc_mcontext.__gregs[_REG_PC] = jb->jb_sc.sc_pc;
77 uc.uc_mcontext.__gregs[_REG_PSL] = jb->jb_sc.sc_ps;
78
79 uc.uc_mcontext.__gregs[_REG_R6] = jb->jb_regs[0];
80 uc.uc_mcontext.__gregs[_REG_R7] = jb->jb_regs[1];
81 uc.uc_mcontext.__gregs[_REG_R8] = jb->jb_regs[2];
82 uc.uc_mcontext.__gregs[_REG_R9] = jb->jb_regs[3];
83 uc.uc_mcontext.__gregs[_REG_R10] = jb->jb_regs[4];
84 uc.uc_mcontext.__gregs[_REG_R11] = jb->jb_regs[5];
85
86 /* Copy signal mask */
87 uc.uc_sigmask = jb->jb_sc.sc_mask;
88
89 setcontext(&uc);
90 err:
91 longjmperror();
92 abort();
93 /* NOTREACHED */
94 }
95