106 lines
2.7 KiB
C
106 lines
2.7 KiB
C
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/*
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* Copyright (c) 1993 Paul Kranenburg
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Paul Kranenburg.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software withough specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: dl.c,v 1.1 1993/10/17 00:45:46 pk Exp $
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*/
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#include <sys/param.h>
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#include <sys/types.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <a.out.h>
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#include <link.h>
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static struct ld_entry *entry;
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static int
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dlinit()
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{
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struct link_dynamic *dp;
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struct exec *hp;
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hp = (struct exec *)(__LDPGSZ);
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if (N_BADMAG(*hp)) {
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fprintf(stderr, "Bad magic\n");
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errno = EFTYPE;
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return -1;
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}
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if (!N_IS_DYNAMIC(*hp)) {
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fprintf(stderr, "Not dynamic\n");
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errno = EFTYPE;
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return -1;
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}
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dp = (struct link_dynamic *)N_DATADDR(*hp);
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if (dp->ld_version != LD_VERSION_BSD) {
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fprintf(stderr, "Unsupported link_dynamic version\n");
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errno = EOPNOTSUPP;
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return -1;
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}
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entry = dp->ld_entry;
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}
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int
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dlopen(name, mode)
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char *name;
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int mode;
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{
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if (entry == NULL && dlinit() == -1)
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return -1;
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return (entry->dlopen)(name, mode);
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}
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int
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dlclose(fd)
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int fd;
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{
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if (entry == NULL)
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dlinit();
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return (entry->dlclose)(fd);
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}
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int
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dlsym(fd, name)
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int fd;
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char *name;
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{
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if (entry == NULL && dlinit() == -1)
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return -1;
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return (entry->dlsym)(fd, name);
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}
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