Line data    Source code

       1             : /* Return offset in archive for current file ELF.
       2             :    Copyright (C) 2005, 2008, 2015 Red Hat, Inc.
       3             :    This file is part of elfutils.
       4             :    Contributed by Ulrich Drepper <drepper@redhat.com>, 2005.
       5             : 
       6             :    This file is free software; you can redistribute it and/or modify
       7             :    it under the terms of either
       8             : 
       9             :      * the GNU Lesser General Public License as published by the Free
      10             :        Software Foundation; either version 3 of the License, or (at
      11             :        your option) any later version
      12             : 
      13             :    or
      14             : 
      15             :      * the GNU General Public License as published by the Free
      16             :        Software Foundation; either version 2 of the License, or (at
      17             :        your option) any later version
      18             : 
      19             :    or both in parallel, as here.
      20             : 
      21             :    elfutils is distributed in the hope that it will be useful, but
      22             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      23             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      24             :    General Public License for more details.
      25             : 
      26             :    You should have received copies of the GNU General Public License and
      27             :    the GNU Lesser General Public License along with this program.  If
      28             :    not, see <http://www.gnu.org/licenses/>.  */
      29             : 
      30             : #ifdef HAVE_CONFIG_H
      31             : # include <config.h>
      32             : #endif
      33             : 
      34             : #include <assert.h>
      35             : #include <libelf.h>
      36             : #include <stddef.h>
      37             : 
      38             : #include "libelfP.h"
      39             : 
      40             : 
      41             : off_t
      42          38 : elf_getaroff (Elf *elf)
      43             : {
      44             :   /* Be gratious, the specs demand it.  */
      45          38 :   if (elf == NULL || elf->parent == NULL)
      46             :     return ELF_C_NULL;
      47             : 
      48             :   /* We can be sure the parent is an archive.  */
      49           3 :   Elf *parent = elf->parent;
      50           3 :   assert (parent->kind == ELF_K_AR);
      51             : 
      52           3 :   return elf->start_offset - sizeof (struct ar_hdr) - parent->start_offset;
      53             : }