elf/dl-fini.c

   1 /* Call the termination functions of loaded shared objects.
   2    Copyright (C) 1995, 1996, 1998 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 Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    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    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <link.h>
  21
  22 void
  23 _dl_fini (void)
  24 {
  25   struct link_map *l;
  26
  27   for (l = _dl_loaded; l; l = l->l_next)
  28     if (l->l_init_called)
  29       {
  30         if (l->l_info[DT_FINI] &&
  31             !(l->l_name[0] == '\0' && l->l_type == lt_executable))
  32           {
  33             /* When debugging print a message first.  */
  34             if (_dl_debug_impcalls)
  35               _dl_debug_message ("\n\tcalling fini: ",
  36                                  l->l_name[0] ? l->l_name : _dl_argv[0],
  37                                  "\n", NULL);
  38
  39             (*(void (*) (void)) (l->l_addr + l->l_info[DT_FINI]->d_un.d_ptr)) ();
  40           }
  41         /* Make sure nothing happens if we are called twice.  */
  42         l->l_init_called = 0;
  43       }
  44 }