ld/emultempl/riscvelf.em

   1 # This shell script emits a C file. -*- C -*-
   2 #   Copyright (C) 2004-2019 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 fragment <<EOF
  22
  23 #include "ldmain.h"
  24 #include "ldctor.h"
  25 #include "elf/riscv.h"
  26 #include "elfxx-riscv.h"
  27
  28 static void
  29 riscv_elf_before_allocation (void)
  30 {
  31   gld${EMULATION_NAME}_before_allocation ();
  32
  33   if (link_info.discard == discard_sec_merge)
  34     link_info.discard = discard_l;
  35
  36   if (!bfd_link_relocatable (&link_info))
  37     {
  38       /* We always need at least some relaxation to handle code alignment.  */
  39       if (RELAXATION_DISABLED_BY_USER)
  40         TARGET_ENABLE_RELAXATION;
  41       else
  42         ENABLE_RELAXATION;
  43     }
  44
  45   link_info.relax_pass = 3;
  46 }
  47
  48 static void
  49 gld${EMULATION_NAME}_after_allocation (void)
  50 {
  51   int need_layout = 0;
  52
  53   /* Don't attempt to discard unused .eh_frame sections until the final link,
  54      as we can't reliably tell if they're used until after relaxation.  */
  55   if (!bfd_link_relocatable (&link_info))
  56     {
  57       need_layout = bfd_elf_discard_info (link_info.output_bfd, &link_info);
  58       if (need_layout < 0)
  59         {
  60           einfo (_("%X%P: .eh_frame/.stab edit: %E\n"));
  61           return;
  62         }
  63     }
  64
  65   ldelf_map_segments (need_layout);
  66 }
  67
  68 /* This is a convenient point to tell BFD about target specific flags.
  69    After the output has been created, but before inputs are read.  */
  70
  71 static void
  72 riscv_create_output_section_statements (void)
  73 {
  74   /* See PR 22920 for an example of why this is necessary.  */
  75   if (strstr (bfd_get_target (link_info.output_bfd), "riscv") == NULL)
  76     {
  77       /* The RISC-V backend needs special fields in the output hash structure.
  78          These will only be created if the output format is a RISC-V format,
  79          hence we do not support linking and changing output formats at the
  80          same time.  Use a link followed by objcopy to change output formats.  */
  81       einfo (_("%F%P: error: cannot change output format"
  82                " whilst linking %s binaries\n"), "RISC-V");
  83       return;
  84     }
  85 }
  86
  87 EOF
  88
  89 LDEMUL_BEFORE_ALLOCATION=riscv_elf_before_allocation
  90 LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
  91 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=riscv_create_output_section_statements