elf/dl-iteratephdr.c

   1 /* Get loaded objects program headers.
   2    Copyright (C) 2001, 2002 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Jakub Jelinek <jakub@redhat.com>, 2001.
   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 License as
   8    published by the Free Software Foundation; either version 2.1 of the
   9    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; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include <errno.h>
  22 #include <ldsodefs.h>
  23 #include <stddef.h>
  24 #include <bits/libc-lock.h>
  25
  26 int
  27 __dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info,
  28                                     size_t size, void *data), void *data)
  29 {
  30   struct link_map *l;
  31   struct dl_phdr_info info;
  32   int ret = 0;
  33
  34   /* Make sure we are alone.  */
  35   __libc_lock_lock_recursive (GL(dl_load_lock));
  36
  37   for (l = GL(dl_loaded); l != NULL; l = l->l_next)
  38     {
  39       /* Skip the dynamic linker.  */
  40       if (l->l_phdr == NULL)
  41         continue;
  42       info.dlpi_addr = l->l_addr;
  43       info.dlpi_name = l->l_name;
  44       info.dlpi_phdr = l->l_phdr;
  45       info.dlpi_phnum = l->l_phnum;
  46       ret = callback (&info, sizeof (struct dl_phdr_info), data);
  47       if (ret)
  48         break;
  49     }
  50
  51   /* Release the lock.  */
  52   __libc_lock_unlock_recursive (GL(dl_load_lock));
  53
  54   return ret;
  55 }
  56
  57 #ifdef SHARED
  58 weak_alias (__dl_iterate_phdr, dl_iterate_phdr);
  59 #endif