1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1997-2012 AT&T Intellectual Property          *
5*                      and is licensed under the                       *
6*                 Eclipse Public License, Version 1.0                  *
7*                    by AT&T Intellectual Property                     *
8*                                                                      *
9*                A copy of the License is available at                 *
10*          http://www.eclipse.org/org/documents/epl-v10.html           *
11*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
12*                                                                      *
13*              Information and Software Systems Research               *
14*                            AT&T Research                             *
15*                           Florham Park NJ                            *
16*                                                                      *
17*                 Glenn Fowler <gsf@research.att.com>                  *
18*                                                                      *
19***********************************************************************/
20#pragma prototyped
21/*
22 * Glenn Fowler
23 * AT&T Research
24 */
25
26#include <ast.h>
27#include <error.h>
28#include <dlldefs.h>
29
30/*
31 * dlsym() with `_' weak fallback
32 */
33
34void*
35dlllook(void* dll, const char* name)
36{
37	register void*	addr;
38	char		buf[256];
39
40	if (!(addr = dlsym(dll, name)) && strlen(name) < (sizeof(buf) - 2))
41	{
42		buf[0] = '_';
43		strcpy(buf + 1, name);
44		name = (const char*)buf;
45		addr = dlsym(dll, name);
46	}
47	errorf("dll", NiL, -1, "dlllook: %s addr %p", name, addr);
48	return addr;
49}
50