Start removing the old build infrastructure for the a.out
[dragonfly.git] / lib / libc / gen / dlfcn.c
... / ...
CommitLineData
1/*-
2 * Copyright (c) 1998 John D. Polstra
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 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: src/lib/libc/gen/dlfcn.c,v 1.6.2.1 2003/02/20 20:42:45 kan Exp $
27 * $DragonFly: src/lib/libc/gen/dlfcn.c,v 1.3 2004/03/20 16:27:39 drhodus Exp $
28 */
29
30#include <dlfcn.h>
31#include <stddef.h>
32
33static const char sorry[] = "Service unavailable";
34
35/*
36 * For ELF, the dynamic linker directly resolves references to its
37 * services to functions inside the dynamic linker itself. These
38 * weak-symbol stubs are necessary so that "ld" won't complain about
39 * undefined symbols. The stubs are executed only when the program is
40 * linked statically, or when a given service isn't implemented in the
41 * dynamic linker. They must return an error if called, and they must
42 * be weak symbols so that the dynamic linker can override them.
43 */
44
45#pragma weak _rtld_error
46void
47_rtld_error(const char *fmt, ...)
48{
49}
50
51#pragma weak dladdr
52int
53dladdr(const void *addr, Dl_info *dlip)
54{
55 _rtld_error(sorry);
56 return 0;
57}
58
59#pragma weak dlclose
60int
61dlclose(void *handle)
62{
63 _rtld_error(sorry);
64 return -1;
65}
66
67#pragma weak dlerror
68const char *
69dlerror(void)
70{
71 return sorry;
72}
73
74#pragma weak dllockinit
75void
76dllockinit(void *context,
77 void *(*lock_create)(void *context),
78 void (*rlock_acquire)(void *lock),
79 void (*wlock_acquire)(void *lock),
80 void (*lock_release)(void *lock),
81 void (*lock_destroy)(void *lock),
82 void (*context_destroy)(void *context))
83{
84 if (context_destroy != NULL)
85 context_destroy(context);
86}
87
88#pragma weak dlopen
89void *
90dlopen(const char *name, int mode)
91{
92 _rtld_error(sorry);
93 return NULL;
94}
95
96#pragma weak dlsym
97void *
98dlsym(void *handle, const char *name)
99{
100 _rtld_error(sorry);
101 return NULL;
102}
103
104#pragma weak dlinfo
105int
106dlinfo(void *handle, int request, void *p)
107{
108 _rtld_error(sorry);
109 return NULL;
110}