Line data    Source code

       1             : /* Coordinate ELF library and application versions.
       2             :    Copyright (C) 1998, 1999, 2000, 2002, 2015 Red Hat, Inc.
       3             :    This file is part of elfutils.
       4             :    Contributed by Ulrich Drepper <drepper@redhat.com>, 1998.
       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 <libelfP.h>
      35             : 
      36             : 
      37             : /* Is the version initialized?  */
      38             : int __libelf_version_initialized;
      39             : 
      40             : /* Currently selected version.  */
      41             : unsigned int __libelf_version = EV_CURRENT;
      42             : 
      43             : 
      44             : unsigned int
      45        6723 : elf_version (unsigned int version)
      46             : {
      47        6723 :   if (version == EV_NONE)
      48           0 :     return __libelf_version;
      49             : 
      50        6723 :   if (likely (version < EV_NUM))
      51             :     {
      52             :       /* Phew, we know this version.  */
      53        6723 :       unsigned int last_version = __libelf_version;
      54             : 
      55             :       /* Store the new version.  */
      56        6723 :       __libelf_version = version;
      57             : 
      58             :       /* Signal that the version is now initialized.  */
      59        6723 :       __libelf_version_initialized = 1;
      60             : 
      61             :       /* And return the last version.  */
      62        6723 :       return last_version;
      63             :     }
      64             : 
      65             :   /* We cannot handle this version.  */
      66           0 :   __libelf_seterrno (ELF_E_UNKNOWN_VERSION);
      67           0 :   return EV_NONE;
      68             : }
      69             : INTDEF(elf_version)