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[glibc/history.git] / dlfcn / dladdr1.c
blob0f2b603f7c79de8422c8dc4af311cb6f20ee21e5
1 /* Locate the shared object symbol nearest a given address.
2 Copyright (C) 2003, 2004 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
20 #include <dlfcn.h>
22 #if !defined SHARED && defined IS_IN_libdl
24 int
25 dladdr1 (const void *address, Dl_info *info, void **extra, int flags)
27 return __dladdr1 (address, info, extra, flags);
30 #else
32 int
33 __dladdr1 (const void *address, Dl_info *info, void **extra, int flags)
35 # ifdef SHARED
36 if (__builtin_expect (_dlfcn_hook != NULL, 0))
37 return _dlfcn_hook->dladdr1 (address, info, extra, flags);
38 # endif
40 switch (flags)
42 default: /* Make this an error? */
43 case 0:
44 return _dl_addr (address, info, NULL, NULL);
45 case RTLD_DL_SYMENT:
46 return _dl_addr (address, info, NULL, (const ElfW(Sym) **) extra);
47 case RTLD_DL_LINKMAP:
48 return _dl_addr (address, info, (struct link_map **) extra, NULL);
51 # ifdef SHARED
52 strong_alias (__dladdr1, dladdr1)
53 # endif
54 #endif