2 * Copyright (c) 1998 John D. Polstra
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 * Linkage to services provided by the dynamic linker.
37 static char sorry[] = "Service unavailable";
40 * For ELF, the dynamic linker directly resolves references to its
41 * services to functions inside the dynamic linker itself. These
42 * weak-symbol stubs are necessary so that "ld" won't complain about
43 * undefined symbols. The stubs are executed only when the program is
44 * linked statically, or when a given service isn't implemented in the
45 * dynamic linker. They must return an error if called, and they must
46 * be weak symbols so that the dynamic linker can override them.
49 #pragma weak _rtld_error
51 _rtld_error(const char *fmt, ...)
57 dladdr(const void *addr, Dl_info *dlip)
78 #pragma weak dllockinit
80 dllockinit(void *context,
81 void *(*lock_create)(void *context),
82 void (*rlock_acquire)(void *lock),
83 void (*wlock_acquire)(void *lock),
84 void (*lock_release)(void *lock),
85 void (*lock_destroy)(void *lock),
86 void (*context_destroy)(void *context))
88 if (context_destroy != NULL)
89 context_destroy(context);
94 dlopen(const char *name, int mode)
102 dlsym(void * __restrict handle, const char * __restrict name)
110 dlfunc(void * __restrict handle, const char * __restrict name)
118 dlvsym(void * __restrict handle, const char * __restrict name,
119 const char * __restrict version)
127 dlinfo(void * __restrict handle, int request, void * __restrict p)
133 #pragma weak _rtld_thread_init
135 _rtld_thread_init(void * li)
140 #pragma weak dl_iterate_phdr
142 dl_iterate_phdr(int (*callback)(struct dl_phdr_info *, size_t, void *),
149 #pragma weak _rtld_atfork_pre
151 _rtld_atfork_pre(int *locks)
155 #pragma weak _rtld_atfork_post
157 _rtld_atfork_post(int *locks)