1/* Locate the shared object symbol nearest a given address.
2 Copyright (C) 2003-2017 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <dlfcn.h>
20
21#if !defined SHARED && IS_IN (libdl)
22
23int
24dladdr1 (const void *address, Dl_info *info, void **extra, int flags)
25{
26 return __dladdr1 (address, info, extra, flags);
27}
28
29#else
30
31int
32__dladdr1 (const void *address, Dl_info *info, void **extra, int flags)
33{
34# ifdef SHARED
35 if (__glibc_unlikely (_dlfcn_hook != NULL))
36 return _dlfcn_hook->dladdr1 (address, info, extra, flags);
37# endif
38
39 switch (flags)
40 {
41 default: /* Make this an error? */
42 case 0:
43 return _dl_addr (address, info, NULL, NULL);
44 case RTLD_DL_SYMENT:
45 return _dl_addr (address, info, NULL, (const ElfW(Sym) **) extra);
46 case RTLD_DL_LINKMAP:
47 return _dl_addr (address, info, (struct link_map **) extra, NULL);
48 }
49}
50# ifdef SHARED
51strong_alias (__dladdr1, dladdr1)
52# endif
53#endif
54