ld/emultempl/elf-generic.em

   1 # This shell script emits a C file. -*- C -*-
   2 #   Copyright (C) 2006-2014 Free Software Foundation, Inc.
   3 #
   4 # This file is part of the GNU Binutils.
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program 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
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; if not, write to the Free Software
  18 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  19 # MA 02110-1301, USA.
  20 #
  21
  22 # This file is sourced from elf32.em and from ELF targets that use
  23 # generic.em.
  24 #
  25 fragment <<EOF
  26
  27 static void
  28 gld${EMULATION_NAME}_map_segments (bfd_boolean need_layout)
  29 {
  30   int tries = 10;
  31
  32   do
  33     {
  34       lang_relax_sections (need_layout);
  35       need_layout = FALSE;
  36
  37       if (link_info.output_bfd->xvec->flavour == bfd_target_elf_flavour
  38           && !link_info.relocatable)
  39         {
  40           bfd_size_type phdr_size;
  41
  42           phdr_size = elf_program_header_size (link_info.output_bfd);
  43           /* If we don't have user supplied phdrs, throw away any
  44              previous linker generated program headers.  */
  45           if (lang_phdr_list == NULL)
  46             elf_seg_map (link_info.output_bfd) = NULL;
  47           if (!_bfd_elf_map_sections_to_segments (link_info.output_bfd,
  48                                                   &link_info))
  49             einfo ("%F%P: map sections to segments failed: %E\n");
  50
  51           if (phdr_size != elf_program_header_size (link_info.output_bfd))
  52             {
  53               if (tries > 6)
  54                 /* The first few times we allow any change to
  55                    phdr_size .  */
  56                 need_layout = TRUE;
  57               else if (phdr_size
  58                        < elf_program_header_size (link_info.output_bfd))
  59                 /* After that we only allow the size to grow.  */
  60                 need_layout = TRUE;
  61               else
  62                 elf_program_header_size (link_info.output_bfd) = phdr_size;
  63             }
  64         }
  65     }
  66   while (need_layout && --tries);
  67
  68   if (tries == 0)
  69     einfo (_("%P%F: looping in map_segments"));
  70 }
  71 EOF