106 lines
2.7 KiB
C
106 lines
2.7 KiB
C
/*
|
|
* Copyright (c) 1993 Paul Kranenburg
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Paul Kranenburg.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software withough specific prior written permission
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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: dl.c,v 1.1 1993/10/17 00:45:46 pk Exp $
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/types.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <fcntl.h>
|
|
#include <a.out.h>
|
|
|
|
#include <link.h>
|
|
|
|
static struct ld_entry *entry;
|
|
|
|
static int
|
|
dlinit()
|
|
{
|
|
struct link_dynamic *dp;
|
|
struct exec *hp;
|
|
|
|
hp = (struct exec *)(__LDPGSZ);
|
|
if (N_BADMAG(*hp)) {
|
|
fprintf(stderr, "Bad magic\n");
|
|
errno = EFTYPE;
|
|
return -1;
|
|
}
|
|
|
|
if (!N_IS_DYNAMIC(*hp)) {
|
|
fprintf(stderr, "Not dynamic\n");
|
|
errno = EFTYPE;
|
|
return -1;
|
|
}
|
|
|
|
dp = (struct link_dynamic *)N_DATADDR(*hp);
|
|
if (dp->ld_version != LD_VERSION_BSD) {
|
|
fprintf(stderr, "Unsupported link_dynamic version\n");
|
|
errno = EOPNOTSUPP;
|
|
return -1;
|
|
}
|
|
|
|
entry = dp->ld_entry;
|
|
}
|
|
|
|
int
|
|
dlopen(name, mode)
|
|
char *name;
|
|
int mode;
|
|
{
|
|
if (entry == NULL && dlinit() == -1)
|
|
return -1;
|
|
|
|
return (entry->dlopen)(name, mode);
|
|
}
|
|
|
|
int
|
|
dlclose(fd)
|
|
int fd;
|
|
{
|
|
if (entry == NULL)
|
|
dlinit();
|
|
|
|
return (entry->dlclose)(fd);
|
|
}
|
|
|
|
int
|
|
dlsym(fd, name)
|
|
int fd;
|
|
char *name;
|
|
{
|
|
if (entry == NULL && dlinit() == -1)
|
|
return -1;
|
|
|
|
return (entry->dlsym)(fd, name);
|
|
}
|