kmodsrc/old_code_loader.c

   1 /*  Copyright (C) 2007-2009  Ksplice, Inc.
   2  *  Authors: Jeff Arnold, Anders Kaseorg, Tim Abbott
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License, version 2.
   6  *
   7  *  This program is distributed in the hope that it will be useful,
   8  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  *  GNU General Public License for more details.
  11  *
  12  *  You should have received a copy of the GNU General Public License
  13  *  along with this program; if not, write to the Free Software
  14  *  Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
  15  *  02110-1301, USA.
  16  */
  17
  18 #ifdef KSPLICE_STANDALONE
  19 #include "ksplice.h"
  20 #else
  21 #include <linux/ksplice.h>
  22 #endif
  23
  24 extern struct ksplice_reloc ksplice_relocs[], ksplice_relocs_end[];
  25 extern struct ksplice_section ksplice_sections[], ksplice_sections_end[];
  26 extern struct ksplice_symbol ksplice_symbols[], ksplice_symbols_end[];
  27 #ifdef KSPLICE_NEED_PARAINSTRUCTIONS
  28 extern struct paravirt_patch_site parainstructions[], parainstructions_end[];
  29 #endif
  30 #ifdef KSPLICE_STANDALONE
  31 extern struct ksplice_system_map ksplice_system_map[], ksplice_system_map_end[];
  32 #endif /* KSPLICE_STANDALONE */
  33
  34 /* Defined in new_code_loader.c */
  35 #define change KSPLICE_UNIQ(change)
  36 extern struct ksplice_mod_change change;
  37
  38 static struct ksplice_code old_code = {
  39         .relocs = ksplice_relocs,
  40         .relocs_end = ksplice_relocs_end,
  41         .sections = ksplice_sections,
  42         .sections_end = ksplice_sections_end,
  43         .symbols = ksplice_symbols,
  44         .symbols_end = ksplice_symbols_end,
  45 #ifdef KSPLICE_NEED_PARAINSTRUCTIONS
  46         .parainstructions = parainstructions,
  47         .parainstructions_end = parainstructions_end,
  48 #endif
  49 #ifdef KSPLICE_STANDALONE
  50         .system_map = ksplice_system_map,
  51         .system_map_end = ksplice_system_map_end,
  52 #endif /* KSPLICE_STANDALONE */
  53 };
  54
  55 static int init_helper(void)
  56 {
  57         change.old_code = old_code;
  58         return init_ksplice_mod_change(&change);
  59 }
  60
  61 static void cleanup_helper(void)
  62 {
  63         cleanup_ksplice_mod_change(&change);
  64 }
  65
  66 module_init(init_helper);
  67 module_exit(cleanup_helper);
  68
  69 MODULE_AUTHOR("Ksplice, Inc.");
  70 MODULE_DESCRIPTION("Ksplice rebootless update helper module");
  71 #ifdef KSPLICE_VERSION
  72 MODULE_VERSION(KSPLICE_VERSION);
  73 #endif
  74 MODULE_LICENSE("GPL v2");