387 lines
13 KiB
Plaintext
387 lines
13 KiB
Plaintext
# This shell script emits a C file. -*- C -*-
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# Copyright (C) 2012-2015 Free Software Foundation, Inc.
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# Contributed by Andes Technology Corporation.
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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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#
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fragment <<EOF
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/nds32.h"
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#include "bfd_stdint.h"
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#include "elf32-nds32.h"
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static int relax_fp_as_gp = 1; /* --mrelax-omit-fp */
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static int eliminate_gc_relocs = 0; /* --meliminate-gc-relocs */
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static FILE *sym_ld_script = NULL; /* --mgen-symbol-ld-script=<file> */
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/* Disable if linking a dynamically linked executable. */
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static int load_store_relax = 1;
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static int target_optimize = 0; /* Switch optimization. */
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static int relax_status = 0; /* Finished optimization. */
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static int relax_round = 0; /* Going optimization. */
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static FILE *ex9_export_file = NULL; /* --mexport-ex9=<file> */
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static FILE *ex9_import_file = NULL; /* --mimport-ex9=<file> */
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static int update_ex9_table = 0; /* --mupdate-ex9. */
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static int ex9_limit = 511;
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static bfd_boolean ex9_loop_aware = FALSE; /* Ignore ex9 if inside a loop. */
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static bfd_boolean ifc_loop_aware = FALSE; /* Ignore ifc if inside a loop. */
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/* Save the target options into output bfd to avoid using to many global
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variables. Do this after the output has been created, but before
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inputs are read. */
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static void
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nds32_elf_create_output_section_statements (void)
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{
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if (strstr (bfd_get_target (link_info.output_bfd), "nds32") == NULL)
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{
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/* Check the output target is nds32. */
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einfo ("%F%X%P: error: Cannot change output format whilst "
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"linking NDS32 binaries.\n");
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return;
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}
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bfd_elf32_nds32_set_target_option (&link_info, relax_fp_as_gp,
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eliminate_gc_relocs,
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sym_ld_script,
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load_store_relax,
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target_optimize, relax_status, relax_round,
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ex9_export_file, ex9_import_file,
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update_ex9_table, ex9_limit,
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ex9_loop_aware, ifc_loop_aware);
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}
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static void
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nds32_elf_after_parse (void)
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{
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if (bfd_link_relocatable (&link_info))
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DISABLE_RELAXATION;
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if (!RELAXATION_ENABLED)
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{
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target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON);
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target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
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relax_fp_as_gp = 0;
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}
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if (ex9_import_file != NULL)
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{
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ex9_export_file = NULL;
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target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
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}
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else
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update_ex9_table = 0;
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if (bfd_link_pic (&link_info))
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{
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target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON);
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target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
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}
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gld${EMULATION_NAME}_after_parse ();
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}
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static void
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nds32_elf_after_open (void)
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{
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unsigned int arch_ver = (unsigned int)-1;
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unsigned int abi_ver = (unsigned int)-1;
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bfd *abfd;
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/* For now, make sure all object files are of the same architecture.
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We may try to merge object files with different architecture together. */
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for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next)
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{
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if (arch_ver == (unsigned int)-1 && E_N1_ARCH != (elf_elfheader (abfd)->e_flags & EF_NDS_ARCH))
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arch_ver = elf_elfheader (abfd)->e_flags & EF_NDS_ARCH ;
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if (abi_ver == (unsigned int)-1)
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{
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/* Initialize ABI version, if not ABI0.
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(OS uses empty file to create empty ELF with ABI0). */
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if ((elf_elfheader (abfd)->e_flags & EF_NDS_ABI) != 0)
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abi_ver = elf_elfheader (abfd)->e_flags & EF_NDS_ABI ;
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}
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else if ((elf_elfheader (abfd)->e_flags & EF_NDS_ABI) != 0
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&& abi_ver != (elf_elfheader (abfd)->e_flags & EF_NDS_ABI))
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{
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/* Incompatible objects. */
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einfo (_("%F%B: ABI version of object files mismatched\n"), abfd);
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}
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#if defined NDS32_EX9_EXT
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/* Append .ex9.itable section in the last input object file. */
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if (abfd->link_next == NULL && (target_optimize & NDS32_RELAX_EX9_ON))
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{
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asection *itable;
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struct bfd_link_hash_entry *h;
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itable = bfd_make_section_with_flags (abfd, ".ex9.itable",
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SEC_CODE | SEC_ALLOC | SEC_LOAD
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| SEC_HAS_CONTENTS | SEC_READONLY
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| SEC_IN_MEMORY | SEC_KEEP);
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if (itable)
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{
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itable->gc_mark = 1;
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itable->alignment_power = 2;
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itable->size = 0x1000;
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itable->contents = bfd_zalloc (abfd, itable->size);
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/* Add a symbol in the head of ex9.itable to objdump clearly. */
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h = bfd_link_hash_lookup (link_info.hash, "_EX9_BASE_",
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FALSE, FALSE, FALSE);
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_bfd_generic_link_add_one_symbol
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(&link_info, link_info.output_bfd, "_EX9_BASE_",
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BSF_GLOBAL | BSF_WEAK, itable, 0, (const char *) NULL, FALSE,
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get_elf_backend_data (link_info.output_bfd)->collect, &h);
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}
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}
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#endif
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}
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/* Check object files if the target is dynamic linked executable
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or shared object. */
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if (elf_hash_table (&link_info)->dynamic_sections_created
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|| bfd_link_pic (&link_info))
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{
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for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next)
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{
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if (!(elf_elfheader (abfd)->e_flags & E_NDS32_HAS_PIC))
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{
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/* Non-PIC object file is used. */
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if (bfd_link_pic (&link_info))
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{
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/* For PIE or shared object, all input must be PIC. */
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einfo (_("%B: must use -fpic to compile this file "
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"for shared object or PIE\n"), abfd);
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}
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else
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{
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/* Dynamic linked executable with SDA and non-PIC.
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Turn off load/store relaxtion. */
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/* TODO: This may support in the future. */
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load_store_relax = 0 ;
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relax_fp_as_gp = 0;
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}
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}
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}
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/* Turn off relax when building shared object or PIE
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until we can support their relaxation. */
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}
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/* Call the standard elf routine. */
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gld${EMULATION_NAME}_after_open ();
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}
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static void
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nds32_elf_after_allocation (void)
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{
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if (target_optimize & NDS32_RELAX_EX9_ON
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|| (ex9_import_file != NULL && update_ex9_table == 1))
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{
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/* Initialize ex9 hash table. */
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if (!nds32_elf_ex9_init ())
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return;
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}
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/* Call default after allocation callback.
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1. This is where relaxation is done.
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2. It calls gld${EMULATION_NAME}_map_segments to build ELF segment table.
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3. Any relaxation requires relax being done must be called after it. */
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gld${EMULATION_NAME}_after_allocation ();
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}
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EOF
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# Define some shell vars to insert bits of code into the standard elf
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# parse_args and list_options functions.
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#
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PARSE_AND_LIST_PROLOGUE='
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#define OPTION_BASELINE 301
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#define OPTION_ELIM_GC_RELOCS (OPTION_BASELINE + 1)
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#define OPTION_FP_AS_GP (OPTION_BASELINE + 2)
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#define OPTION_NO_FP_AS_GP (OPTION_BASELINE + 3)
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#define OPTION_REDUCE_FP_UPDATE (OPTION_BASELINE + 4)
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#define OPTION_NO_REDUCE_FP_UPDATE (OPTION_BASELINE + 5)
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#define OPTION_EXPORT_SYMBOLS (OPTION_BASELINE + 6)
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/* These are only available to ex9. */
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#if defined NDS32_EX9_EXT
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#define OPTION_EX9_BASELINE 320
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#define OPTION_EX9_TABLE (OPTION_EX9_BASELINE + 1)
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#define OPTION_NO_EX9_TABLE (OPTION_EX9_BASELINE + 2)
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#define OPTION_EXPORT_EX9 (OPTION_EX9_BASELINE + 3)
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#define OPTION_IMPORT_EX9 (OPTION_EX9_BASELINE + 4)
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#define OPTION_UPDATE_EX9 (OPTION_EX9_BASELINE + 5)
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#define OPTION_EX9_LIMIT (OPTION_EX9_BASELINE + 6)
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#define OPTION_EX9_LOOP (OPTION_EX9_BASELINE + 7)
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#endif
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/* These are only available to link-time ifc. */
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#if defined NDS32_IFC_EXT
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#define OPTION_IFC_BASELINE 340
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#define OPTION_JUMP_IFC (OPTION_IFC_BASELINE + 1)
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#define OPTION_NO_JUMP_IFC (OPTION_IFC_BASELINE + 2)
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#define OPTION_IFC_LOOP (OPTION_IFC_BASELINE + 3)
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#endif
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'
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PARSE_AND_LIST_LONGOPTS='
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{ "mfp-as-gp", no_argument, NULL, OPTION_FP_AS_GP},
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{ "mno-fp-as-gp", no_argument, NULL, OPTION_NO_FP_AS_GP},
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{ "mexport-symbols", required_argument, NULL, OPTION_EXPORT_SYMBOLS},
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/* These are deprecated options. Remove them in the future. */
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{ "mrelax-reduce-fp-update", no_argument, NULL, OPTION_REDUCE_FP_UPDATE},
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{ "mrelax-no-reduce-fp-update", no_argument, NULL, OPTION_NO_REDUCE_FP_UPDATE},
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{ "mbaseline", required_argument, NULL, OPTION_BASELINE},
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{ "meliminate-gc-relocs", no_argument, NULL, OPTION_ELIM_GC_RELOCS},
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{ "mrelax-omit-fp", no_argument, NULL, OPTION_FP_AS_GP},
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{ "mrelax-no-omit-fp", no_argument, NULL, OPTION_NO_FP_AS_GP},
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{ "mgen-symbol-ld-script", required_argument, NULL, OPTION_EXPORT_SYMBOLS},
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/* These are specific optioins for ex9-ext support. */
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#if defined NDS32_EX9_EXT
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{ "mex9", no_argument, NULL, OPTION_EX9_TABLE},
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{ "mno-ex9", no_argument, NULL, OPTION_NO_EX9_TABLE},
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{ "mexport-ex9", required_argument, NULL, OPTION_EXPORT_EX9},
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{ "mimport-ex9", required_argument, NULL, OPTION_IMPORT_EX9},
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{ "mupdate-ex9", no_argument, NULL, OPTION_UPDATE_EX9},
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{ "mex9-limit", required_argument, NULL, OPTION_EX9_LIMIT},
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{ "mex9-loop-aware", no_argument, NULL, OPTION_EX9_LOOP},
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#endif
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/* These are specific optioins for ifc-ext support. */
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#if defined NDS32_IFC_EXT
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{ "mifc", no_argument, NULL, OPTION_JUMP_IFC},
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{ "mno-ifc", no_argument, NULL, OPTION_NO_JUMP_IFC},
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{ "mifc-loop-aware", no_argument, NULL, OPTION_IFC_LOOP},
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#endif
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'
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PARSE_AND_LIST_OPTIONS='
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fprintf (file, _("\
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--m[no-]fp-as-gp Disable/enable fp-as-gp relaxation\n\
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--mexport-symbols=FILE Exporting symbols in linker script\n\
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"));
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#if defined NDS32_EX9_EXT
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fprintf (file, _("\
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--m[no-]ex9 Disable/enable link-time EX9 relaxation\n\
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--mexport-ex9=FILE Export EX9 table after linking\n\
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--mimport-ex9=FILE Import Ex9 table for EX9 relaxation\n\
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--mupdate-ex9 Update existing EX9 table\n\
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--mex9-limit=NUM Maximum number of entries in ex9 table\n\
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--mex9-loop-aware Avoid generate EX9 instruction inside loop\n\
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"));
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#endif
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#if defined NDS32_IFC_EXT
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fprintf (file, _("\
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--m[no-]ifc Disable/enable link-time IFC optimization\n\
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--mifc-loop-aware Avoid generate IFC instruction inside loop\n\
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"));
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#endif
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'
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PARSE_AND_LIST_ARGS_CASES='
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case OPTION_BASELINE:
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einfo ("%P: --mbaseline is not used anymore.\n");
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break;
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case OPTION_ELIM_GC_RELOCS:
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eliminate_gc_relocs = 1;
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break;
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case OPTION_FP_AS_GP:
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case OPTION_NO_FP_AS_GP:
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relax_fp_as_gp = (optc == OPTION_FP_AS_GP);
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break;
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case OPTION_REDUCE_FP_UPDATE:
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case OPTION_NO_REDUCE_FP_UPDATE:
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einfo ("%P: --relax-[no-]reduce-fp-updat is not used anymore.\n");
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break;
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case OPTION_EXPORT_SYMBOLS:
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if (!optarg)
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einfo (_("Missing file for --mexport-symbols.\n"), optarg);
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if(strcmp (optarg, "-") == 0)
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sym_ld_script = stdout;
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else
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{
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sym_ld_script = fopen (optarg, FOPEN_WT);
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if(sym_ld_script == NULL)
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einfo (_("%P%F: cannot open map file %s: %E.\n"), optarg);
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}
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break;
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#if defined NDS32_EX9_EXT
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case OPTION_EX9_TABLE:
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target_optimize = target_optimize | NDS32_RELAX_EX9_ON;
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break;
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case OPTION_NO_EX9_TABLE:
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target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
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break;
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case OPTION_EXPORT_EX9:
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if (!optarg)
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einfo (_("Missing file for --mexport-ex9=<file>.\n"));
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if(strcmp (optarg, "-") == 0)
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ex9_export_file = stdout;
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else
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{
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ex9_export_file = fopen (optarg, "wb");
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if(ex9_export_file == NULL)
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einfo (_("ERROR %P%F: cannot open ex9 export file %s.\n"), optarg);
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}
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break;
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case OPTION_IMPORT_EX9:
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if (!optarg)
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einfo (_("Missing file for --mimport-ex9=<file>.\n"));
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ex9_import_file = fopen (optarg, "rb+");
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if(ex9_import_file == NULL)
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einfo (_("ERROR %P%F: cannot open ex9 import file %s.\n"), optarg);
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break;
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case OPTION_UPDATE_EX9:
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update_ex9_table = 1;
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break;
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case OPTION_EX9_LIMIT:
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if (optarg)
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{
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ex9_limit = atoi (optarg);
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if (ex9_limit > 511 || ex9_limit < 1)
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{
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einfo (_("ERROR: the range of ex9_limit must between 1 and 511\n"));
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exit (1);
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}
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}
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break;
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case OPTION_EX9_LOOP:
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target_optimize = target_optimize | NDS32_RELAX_EX9_ON;
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ex9_loop_aware = 1;
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break;
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#endif
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#if defined NDS32_IFC_EXT
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case OPTION_JUMP_IFC:
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target_optimize = target_optimize | NDS32_RELAX_JUMP_IFC_ON;
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break;
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case OPTION_NO_JUMP_IFC:
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target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON);
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break;
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case OPTION_IFC_LOOP:
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target_optimize = target_optimize | NDS32_RELAX_JUMP_IFC_ON;
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ifc_loop_aware = 1;
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break;
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#endif
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'
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LDEMUL_AFTER_OPEN=nds32_elf_after_open
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LDEMUL_AFTER_PARSE=nds32_elf_after_parse
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LDEMUL_AFTER_ALLOCATION=nds32_elf_after_allocation
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LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=nds32_elf_create_output_section_statements
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