elf/dl-preinit.c

   1 /* Return the next shared object pre-initializer function not yet run.
   2    Copyright (C) 1995, 1996, 1998, 1999 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 <stddef.h>
  21 #include <elf/ldsodefs.h>
  22
  23
  24 /* Run initializers for MAP and its dependencies, in inverse dependency
  25    order (that is, leaf nodes first).  */
  26
  27 ElfW(Addr)
  28 internal_function
  29 _dl_preinit_next (struct r_scope_elem *searchlist)
  30 {
  31   struct link_map *l = searchlist->r_list[0];
  32   ElfW(Addr) *array;
  33
  34   if (l->l_runcount >= l->l_preinitcount)
  35     {
  36       /* That were all of the constructors.  */
  37       l->l_runcount = 0;
  38       return 0;
  39     }
  40
  41   /* Print a debug message if wanted.  */
  42   if (_dl_debug_impcalls && l->l_runcount == 0)
  43     _dl_debug_message (1, "\ncalling preinit: ",
  44                        l->l_name[0] ? l->l_name : _dl_argv[0],
  45                        "\n\n", NULL);
  46
  47   array = (ElfW(Addr) *) l->l_info[DT_PREINIT_ARRAY]->d_un.d_ptr;
  48   return l->l_addr + array[l->l_runcount++];
  49 }