mirror of
https://github.com/autc04/Retro68.git
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106 lines
3.5 KiB
Plaintext
106 lines
3.5 KiB
Plaintext
# This shell script emits a C file. -*- C -*-
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# Copyright (C) 2004-2022 Free Software Foundation, Inc.
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#
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# This file is part of the GNU Binutils.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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# MA 02110-1301, USA.
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fragment <<EOF
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#include "ldmain.h"
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#include "ldctor.h"
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#include "elf/riscv.h"
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#include "elfxx-riscv.h"
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static void
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riscv_elf_before_allocation (void)
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{
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gld${EMULATION_NAME}_before_allocation ();
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if (link_info.discard == discard_sec_merge)
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link_info.discard = discard_l;
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if (!bfd_link_relocatable (&link_info))
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{
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/* We always need at least some relaxation to handle code alignment. */
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if (RELAXATION_DISABLED_BY_USER)
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TARGET_ENABLE_RELAXATION;
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else
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ENABLE_RELAXATION;
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}
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link_info.relax_pass = 3;
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}
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static void
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gld${EMULATION_NAME}_after_allocation (void)
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{
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int need_layout = 0;
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/* Don't attempt to discard unused .eh_frame sections until the final link,
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as we can't reliably tell if they're used until after relaxation. */
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if (!bfd_link_relocatable (&link_info))
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{
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need_layout = bfd_elf_discard_info (link_info.output_bfd, &link_info);
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if (need_layout < 0)
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{
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einfo (_("%X%P: .eh_frame/.stab edit: %E\n"));
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return;
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}
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}
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/* PR 27566, if the phase of data segment is exp_seg_relro_adjust,
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that means we are still adjusting the relro, and shouldn't do the
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relaxations at this stage. Otherwise, we will get the symbol
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values beofore handling the relro, and may cause truncated fails
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when the relax range crossing the data segment. One of the solution
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is to monitor the data segment phase while relaxing, to know whether
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the relro has been handled or not.
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I think we probably need to record more information about data
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segment or alignments in the future, to make sure it is safe
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to doing relaxations. */
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enum phase_enum *phase = &(expld.dataseg.phase);
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bfd_elf${ELFSIZE}_riscv_set_data_segment_info (&link_info, (int *) phase);
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ldelf_map_segments (need_layout);
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}
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/* This is a convenient point to tell BFD about target specific flags.
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After the output has been created, but before inputs are read. */
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static void
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riscv_create_output_section_statements (void)
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{
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/* See PR 22920 for an example of why this is necessary. */
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if (strstr (bfd_get_target (link_info.output_bfd), "riscv") == NULL)
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{
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/* The RISC-V backend needs special fields in the output hash structure.
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These will only be created if the output format is a RISC-V format,
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hence we do not support linking and changing output formats at the
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same time. Use a link followed by objcopy to change output formats. */
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einfo (_("%F%P: error: cannot change output format"
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" whilst linking %s binaries\n"), "RISC-V");
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return;
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}
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}
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EOF
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LDEMUL_BEFORE_ALLOCATION=riscv_elf_before_allocation
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LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
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LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=riscv_create_output_section_statements
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