1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
/* dlsym -- Look up a symbol in a shared object loaded by `dlopen'.
Copyright (C) 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <stddef.h>
#include <link.h>
#include <dlfcn.h>
#include <setjmp.h>
void *
dlsym (void *handle, const char *name)
{
struct link_map *map = handle;
struct link_map *real_next;
Elf32_Addr value;
int lose;
void doit (void)
{
const Elf32_Sym *ref = NULL;
value = _dl_lookup_symbol (name, &ref, map, map->l_name, 1);
}
/* Confine the symbol scope to just this map. */
real_next = map->l_next;
map->l_next = NULL;
lose = _dlerror_run (doit);
map->l_next = real_next;
return lose ? NULL : (void *) value;
}
|
