dlfcn/dladdr.c

   1 /* Locate the shared object symbol nearest a given address.
   2    Copyright (C) 1996, 1997, 1998, 1999, 2003, 2004
   3    Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <dlfcn.h>
  22
  23 #if !defined SHARED && defined IS_IN_libdl
  24
  25 int
  26 dladdr (const void *address, Dl_info *info)
  27 {
  28   return __dladdr (address, info);
  29 }
  30
  31 #else
  32
  33 int
  34 __dladdr (const void *address, Dl_info *info)
  35 {
  36 # ifdef SHARED
  37   if (__builtin_expect (_dlfcn_hook != NULL, 0))
  38     return _dlfcn_hook->dladdr (address, info);
  39 # endif
  40   return _dl_addr (address, info, NULL, NULL);
  41 }
  42 # ifdef SHARED
  43 strong_alias (__dladdr, dladdr)
  44 # endif
  45 #endif