| 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 |