ld/emultempl/elf-generic.em

   1 # This shell script emits a C file. -*- C -*-
   2 #   Copyright 2006, 2007, 2008 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       if (need_layout)
  35         {
  36           lang_reset_memory_regions ();
  37
  38           /* Resize the sections.  */
  39           lang_size_sections (NULL, TRUE);
  40
  41           /* Redo special stuff.  */
  42           ldemul_after_allocation ();
  43
  44           /* Do the assignments again.  */
  45           lang_do_assignments ();
  46
  47           need_layout = FALSE;
  48         }
  49
  50       if (link_info.output_bfd->xvec->flavour == bfd_target_elf_flavour
  51           && !link_info.relocatable)
  52         {
  53           bfd_size_type phdr_size;
  54
  55           phdr_size = elf_tdata (link_info.output_bfd)->program_header_size;
  56           /* If we don't have user supplied phdrs, throw away any
  57              previous linker generated program headers.  */
  58           if (lang_phdr_list == NULL)
  59             elf_tdata (link_info.output_bfd)->segment_map = NULL;
  60           if (!_bfd_elf_map_sections_to_segments (link_info.output_bfd,
  61                                                   &link_info))
  62             einfo ("%F%P: map sections to segments failed: %E\n");
  63
  64           if (phdr_size
  65               != elf_tdata (link_info.output_bfd)->program_header_size)
  66             {
  67               if (tries > 6)
  68                 /* The first few times we allow any change to
  69                    phdr_size .  */
  70                 need_layout = TRUE;
  71               else if (phdr_size
  72                        < elf_tdata (link_info.output_bfd)->program_header_size)
  73                 /* After that we only allow the size to grow.  */
  74                 need_layout = TRUE;
  75               else
  76                 elf_tdata (link_info.output_bfd)->program_header_size
  77                   = phdr_size;
  78             }
  79         }
  80     }
  81   while (need_layout && --tries);
  82
  83   if (tries == 0)
  84     einfo (_("%P%F: looping in map_segments"));
  85 }
  86 EOF