dlfcn/dladdr.c

   1 /* Locate the shared object symbol nearest a given address.
   2    Copyright (C) 1996-2021 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
  23 int
  24 __dladdr (const void *address, Dl_info *info)
  25 {
  26 #ifdef SHARED
  27   if (!rtld_active ())
  28     return GLRO (dl_dlfcn_hook)->dladdr (address, info);
  29 #endif
  30   return _dl_addr (address, info, NULL, NULL);
  31 }
  32 versioned_symbol (libc, __dladdr, dladdr, GLIBC_2_34);
  33
  34 #if OTHER_SHLIB_COMPAT  (libdl, GLIBC_2_0, GLIBC_2_34)
  35 compat_symbol (libdl, __dladdr, dladdr, GLIBC_2_0);
  36 #endif