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/*-
* Copyright (c) 1998 John D. Polstra
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id$
*/
/*
* Trampolines to services provided by the dynamic linker.
*/
#include <sys/types.h>
#include <nlist.h> /* XXX - Required by link.h */
#include <dlfcn.h>
#include <link.h>
#include <stddef.h>
/*
* These variables are set by code in crt0.o. For compatibility with
* old executables, they must be common, not extern.
*/
struct ld_entry *__ldso_entry; /* Entry points to dynamic linker */
int __ldso_version; /* Dynamic linker version number */
void *
dlopen(name, mode)
const char *name;
int mode;
{
if (__ldso_entry == NULL)
return NULL;
return (__ldso_entry->dlopen)(name, mode);
}
int
dlclose(fd)
void *fd;
{
if (__ldso_entry == NULL)
return -1;
return (__ldso_entry->dlclose)(fd);
}
void *
dlsym(fd, name)
void *fd;
const char *name;
{
if (__ldso_entry == NULL)
return NULL;
if (__ldso_version >= LDSO_VERSION_HAS_DLSYM3) {
void *retaddr = *(&fd - 1); /* XXX - ABI/machine dependent */
return (__ldso_entry->dlsym3)(fd, name, retaddr);
} else
return (__ldso_entry->dlsym)(fd, name);
}
const char *
dlerror()
{
if (__ldso_entry == NULL)
return "Service unavailable";
return (__ldso_entry->dlerror)();
}
int
dladdr(addr, dlip)
const void *addr;
Dl_info *dlip;
{
if (__ldso_entry == NULL || __ldso_version < LDSO_VERSION_HAS_DLADDR)
return 0;
return (__ldso_entry->dladdr)(addr, dlip);
}
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