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.
    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, write to the Free
   17:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   18:    02111-1307 USA.  */
   19: 
   20: #include <dlfcn.h>
   21: 
   22: #if !defined SHARED && defined IS_IN_libdl
   23: 
   24: int
   25: dladdr1 (const void *address, Dl_info *info, void **extra, int flags)
   26: {
   27:   return __dladdr1 (address, info, extra, flags);
   28: }
   29: 
   30: #else
   31: 
   32: int
   33: __dladdr1 (const void *address, Dl_info *info, void **extra, int flags)
   34: {
   35: # ifdef SHARED
   36:   if (__builtin_expect (_dlfcn_hook != NULL, 0))
   37:     return _dlfcn_hook->dladdr1 (address, info, extra, flags);
   38: # endif
   39: 
   40:   switch (flags)
   41:     {
   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);
   49:     }
   50: }
   51: # ifdef SHARED
   52: strong_alias (__dladdr1, dladdr1)
   53: # endif
   54: #endif