1 /*
2 * Copyright (c) 2011 Konstantin Belousov <kib@FreeBSD.org>
3 * 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 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/types.h>
28 #include <sys/ucontext.h>
29 #include <errno.h>
30 #include <stdlib.h>
31
32 int
__getcontextx_size(void)33 __getcontextx_size(void)
34 {
35
36 return (sizeof(ucontext_t));
37 }
38
39 int
__fillcontextx2(char * ctx)40 __fillcontextx2(char *ctx)
41 {
42
43 return (0);
44 }
45
46 int
__fillcontextx(char * ctx)47 __fillcontextx(char *ctx)
48 {
49 ucontext_t *ucp;
50
51 ucp = (ucontext_t *)ctx;
52 return (getcontext(ucp));
53 }
54
55 __weak_reference(__getcontextx, getcontextx);
56
57 ucontext_t *
__getcontextx(void)58 __getcontextx(void)
59 {
60 char *ctx;
61 int error;
62
63 ctx = malloc(__getcontextx_size());
64 if (ctx == NULL)
65 return (NULL);
66 if (__fillcontextx(ctx) == -1) {
67 error = errno;
68 free(ctx);
69 errno = error;
70 return (NULL);
71 }
72 return ((ucontext_t *)ctx);
73 }
74