1/* Locate the shared object symbol nearest a given address.
2 Copyright (C) 2003-2021 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 <https://www.gnu.org/licenses/>. */
18
19#include <dlfcn.h>
20#include <ldsodefs.h>
21#include <shlib-compat.h>
22
23int
24__dladdr1 (const void *address, Dl_info *info, void **extra, int flags)
25{
26#ifdef SHARED
27 if (!rtld_active ())
28 return GLRO (dl_dlfcn_hook)->dladdr1 (address, info, extra, flags);
29#endif
30
31 switch (flags)
32 {
33 default: /* Make this an error? */
34 case 0:
35 return _dl_addr (address, info, NULL, NULL);
36 case RTLD_DL_SYMENT:
37 return _dl_addr (address, info, NULL, (const ElfW(Sym) **) extra);
38 case RTLD_DL_LINKMAP:
39 return _dl_addr (address, info, (struct link_map **) extra, NULL);
40 }
41}
42versioned_symbol (libc, __dladdr1, dladdr1, GLIBC_2_34);
43
44#if OTHER_SHLIB_COMPAT (libdl, GLIBC_2_3_3, GLIBC_2_34)
45compat_symbol (libdl, __dladdr1, dladdr1, GLIBC_2_3_3);
46#endif
47