elf/dl-iteratephdr.c

   1 /* Get loaded objects program headers.
   2    Copyright (C) 2001 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 Library General Public License as
   8    published by the Free Software Foundation; either version 2 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    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library 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 __libc_lock_define (extern, _dl_load_lock)
  27
  28 int
  29 __dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info,
  30                                     size_t size, void *data), void *data)
  31 {
  32   struct link_map *l;
  33   struct dl_phdr_info info;
  34   int ret = 0;
  35
  36   /* Make sure we are alone.  */
  37   __libc_lock_lock (_dl_load_lock);
  38
  39   for (l = _dl_loaded; l != NULL; l = l->l_next)
  40     {
  41       /* Skip the dynamic linker.  */
  42       if (l->l_phdr == NULL)
  43         continue;
  44       info.dlpi_addr = l->l_addr;
  45       info.dlpi_name = l->l_name;
  46       info.dlpi_phdr = l->l_phdr;
  47       info.dlpi_phnum = l->l_phnum;
  48       ret = callback (&info, sizeof (struct dl_phdr_info), data);
  49       if (ret)
  50         break;
  51     }
  52
  53   /* Release the lock.  */
  54   __libc_lock_unlock (_dl_load_lock);
  55
  56   return ret;
  57 }
  58
  59 #ifdef SHARED
  60 weak_alias (__dl_iterate_phdr, dl_iterate_phdr);
  61 #endif