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binutils-gdb/ld/emultempl/nds32elf.em
Alan Modra c72f2fb2bb Make bfd.link_next field a union 
This field of struct bfd is currently only used to chain together
linker input files.  This patch prepares to use the field to stash
the linker hash table, which is always created on the linker output
file.

bfd/
	* bfd.c (struct bfd): Replace link_next with a union.
	* aoutx.h, * bfd.c, * coff-ppc.c, * coff-rs6000.c, * cofflink.c,
	* ecoff.c, * elf-m10300.c, * elf32-arm.c, * elf32-avr.c,
	* elf32-hppa.c, * elf32-i386.c, * elf32-lm32.c, * elf32-m32c.c,
	* elf32-m32r.c, * elf32-m68hc1x.c, * elf32-metag.c,
	* elf32-microblaze.c, * elf32-nds32.c, * elf32-nios2.c,
	* elf32-or1k.c, * elf32-ppc.c, * elf32-rl78.c, * elf32-s390.c,
	* elf32-score.c, * elf32-score7.c, * elf32-sh.c, * elf32-spu.c,
	* elf32-tic6x.c, * elf32-tilepro.c, * elf32-xstormy16.c,
	* elf32-xtensa.c, * elf64-alpha.c, * elf64-hppa.c, * elf64-ia64-vms.c,
	* elf64-mmix.c, * elf64-ppc.c, * elf64-s390.c, * elf64-x86-64.c,
	* elflink.c, * elfnn-aarch64.c, * elfxx-mips.c, * elfxx-sparc.c,
	* elfxx-tilegx.c, * linker.c, * pdp11.c, * peXXigen.c, * simple.c,
	* sunos.c, * vms-alpha.c, * xcofflink.c: Update for above.
	* bfd-in2.h: Regenerate.
include/
	* bfdlink.h: Update for bfd.link_next change.
ld/
	* emultempl/cr16elf.em, * emultempl/elf32.em, * emultempl/genelf.em,
	* emultempl/m68kcoff.em, * emultempl/m68kelf.em,
	* emultempl/nds32elf.em, * emultempl/pe.em, * emultempl/pep.em,
	* ldlang.c, * ldmain.c, * pe-dll.c: Update for bfd.link_next change.
2014-06-13 19:10:57 +09:30

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# This shell script emits a C file. -*- C -*-
# Copyright (C) 2012-2014 Free Software Foundation, Inc.
# Contributed by Andes Technology Corporation.
#
# This file is part of the GNU Binutils.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
# MA 02110-1301, USA.
#
fragment <<EOF
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/nds32.h"
#include "bfd_stdint.h"
#include "elf32-nds32.h"
static int relax_fp_as_gp = 1; /* --mrelax-omit-fp */
static int eliminate_gc_relocs = 0; /* --meliminate-gc-relocs */
static FILE *sym_ld_script = NULL; /* --mgen-symbol-ld-script=<file> */
/* Disable if linking a dynamically linked executable. */
static int load_store_relax = 1;
static int target_optimize = 0; /* Switch optimization. */
static int relax_status = 0; /* Finished optimization. */
static int relax_round = 0; /* Going optimization. */
static FILE *ex9_export_file = NULL; /* --mexport-ex9=<file> */
static FILE *ex9_import_file = NULL; /* --mimport-ex9=<file> */
static int update_ex9_table = 0; /* --mupdate-ex9. */
static int ex9_limit = 511;
static bfd_boolean ex9_loop_aware = FALSE; /* Ignore ex9 if inside a loop. */
static bfd_boolean ifc_loop_aware = FALSE; /* Ignore ifc if inside a loop. */
/* Save the target options into output bfd to avoid using to many global
variables. Do this after the output has been created, but before
inputs are read. */
static void
nds32_elf_create_output_section_statements (void)
{
if (strstr (bfd_get_target (link_info.output_bfd), "nds32") == NULL)
{
/* Check the output target is nds32. */
einfo ("%F%X%P: error: Cannot change output format whilst linking NDS32 binaries.\n");
return;
}
bfd_elf32_nds32_set_target_option (&link_info, relax_fp_as_gp,
eliminate_gc_relocs,
sym_ld_script,
load_store_relax,
target_optimize, relax_status, relax_round,
ex9_export_file, ex9_import_file,
update_ex9_table, ex9_limit,
ex9_loop_aware, ifc_loop_aware);
}
static void
nds32_elf_after_parse (void)
{
if (link_info.relocatable)
DISABLE_RELAXATION;
if (!RELAXATION_ENABLED)
{
target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON);
target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
relax_fp_as_gp = 0;
}
if (ex9_import_file != NULL)
{
ex9_export_file = NULL;
target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
}
else
update_ex9_table = 0;
if (link_info.shared)
{
target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON);
target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
}
after_parse_default ();
}
static void
nds32_elf_after_open (void)
{
unsigned int arch_ver = (unsigned int)-1;
unsigned int abi_ver = (unsigned int)-1;
bfd *abfd;
/* For now, make sure all object files are of the same architecture.
We may try to merge object files with different architecture together. */
for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next)
{
if (arch_ver == (unsigned int)-1 && E_N1_ARCH != (elf_elfheader (abfd)->e_flags & EF_NDS_ARCH))
arch_ver = elf_elfheader (abfd)->e_flags & EF_NDS_ARCH ;
if (abi_ver == (unsigned int)-1)
{
/* Initialize ABI version, if not ABI0.
(OS uses empty file to create empty ELF with ABI0). */
if ((elf_elfheader (abfd)->e_flags & EF_NDS_ABI) != 0)
abi_ver = elf_elfheader (abfd)->e_flags & EF_NDS_ABI ;
}
else if ((elf_elfheader (abfd)->e_flags & EF_NDS_ABI) != 0
&& abi_ver != (elf_elfheader (abfd)->e_flags & EF_NDS_ABI))
{
/* Incompatible objects. */
einfo (_("%F%B: ABI version of object files mismatched\n"), abfd);
}
/* Append .ex9.itable section in the last input object file. */
if (!link_info.relocatable && abfd->link.next == NULL)
{
asection *itable;
struct bfd_link_hash_entry *h;
itable = bfd_make_section_with_flags (abfd, ".ex9.itable",
SEC_CODE | SEC_ALLOC | SEC_LOAD
| SEC_HAS_CONTENTS | SEC_READONLY
| SEC_IN_MEMORY | SEC_KEEP);
if (itable)
{
itable->gc_mark = 1;
itable->alignment_power = 2;
if ((target_optimize & NDS32_RELAX_EX9_ON))
{
itable->size = 0x1000;
itable->contents = bfd_zalloc (abfd, itable->size);
}
else
{
itable->size = 0x4;
itable->contents = bfd_zalloc (abfd, itable->size);
bfd_putb32 (INSN_BREAK_EA,itable->contents);
}
/* Add a symbol in the head of ex9.itable to objdump clearly. */
h = bfd_link_hash_lookup (link_info.hash, "_EX9_BASE_",
FALSE, FALSE, FALSE);
_bfd_generic_link_add_one_symbol
(&link_info, link_info.output_bfd, "_EX9_BASE_",
BSF_GLOBAL | BSF_WEAK, itable, 0, (const char *) NULL, FALSE,
get_elf_backend_data (link_info.output_bfd)->collect, &h);
}
}
}
/* Check object files if the target is dynamic linked executable
or shared object. */
if (elf_hash_table (&link_info)->dynamic_sections_created
|| link_info.shared || link_info.pie)
{
for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next)
{
if (!(elf_elfheader (abfd)->e_flags & E_NDS32_HAS_PIC))
{
/* Non-PIC object file is used. */
if (link_info.shared || link_info.pie)
{
/* For PIE or shared object, all input must be PIC. */
einfo (_("%B: must use -fpic to compile this file for shared object or PIE\n"), abfd);
}
else
{
/* Dynamic linked executable with SDA and non-PIC.
Turn off load/store relaxtion. */
load_store_relax = 0 ;
relax_fp_as_gp = 0;
}
}
}
/* Turn off relax when building shared object or PIE
until we can support their relaxation. */
}
/* Call the standard elf routine. */
gld${EMULATION_NAME}_after_open ();
}
static void nds32_elf_relax_stub (bfd_boolean relax)
{
/* Re-caculate memory map address. */
lang_do_assignments (lang_assigning_phase_enum);
lang_reset_memory_regions ();
one_lang_size_sections_pass (&relax, FALSE);
}
static void
nds32_elf_after_allocation (void)
{
struct elf_nds32_link_hash_table *table;
table = nds32_elf_hash_table (&link_info);
/* Call default after allocation callback.
1. This is where relaxation is done.
2. It calls gld${EMULATION_NAME}_map_segments to build ELF segment table.
3. Any relaxation requires relax being done must be called after it. */
gld${EMULATION_NAME}_after_allocation ();
if (!table)
return;
/* Use IFC */
if ((target_optimize & NDS32_RELAX_JUMP_IFC_ON)
&& !(table->relax_status & NDS32_RELAX_JUMP_IFC_DONE))
{
table->relax_round = NDS32_RELAX_JUMP_IFC_ROUND;
/* Traverse all sections to build j and jal list. */
nds32_elf_relax_stub (TRUE);
/* Replace with ifc. */
if (!nds32_elf_ifc_finish (&link_info))
einfo (_("%F: Please report this bug. IFC error.\n"));
table->relax_round = NDS32_RELAX_NONE_ROUND;
/* Adjust address after ifcall. */
nds32_elf_relax_stub (FALSE);
if (!nds32_elf_ifc_reloc ())
einfo (_("%F: Please report this bug. IFC error.\n"));
}
/* EX9 Instruction Table Relaxation. */
if (!link_info.relocatable && !nds32_elf_ex9_itb_base (&link_info))
einfo (_("%F: Please report this bug. Ex9 relocation error.\n"));
/* Generate ex9 table. */
if ((target_optimize & NDS32_RELAX_EX9_ON)
&& !(table->relax_status & NDS32_RELAX_EX9_DONE))
{
/* Ex9 entry point. */
table->relax_round = NDS32_RELAX_EX9_BUILD_ROUND;
/* Initialize ex9 hash table. */
if (!nds32_elf_ex9_init ())
return;
/* Build ex9 instruction table. */
nds32_elf_relax_stub (TRUE);
nds32_elf_ex9_finish (&link_info);
/* Replace with ex9.it. */
nds32_elf_relax_stub (TRUE);
table->relax_round = NDS32_RELAX_NONE_ROUND;
/* Do ifc again. */
if (target_optimize & NDS32_RELAX_JUMP_IFC_ON)
if (!nds32_elf_ifc_finish (&link_info))
einfo (_("%F: Please report this bug. IFC error.\n"));
/* Re-caculate memory map address. */
lang_do_assignments (lang_assigning_phase_enum);
/* Relocation for .ex9.itable. */
nds32_elf_ex9_reloc_jmp (&link_info);
}
else if (ex9_import_file != NULL
&& !(table->relax_status = NDS32_RELAX_EX9_DONE))
{
/* Import ex9 table. */
if (update_ex9_table == 1)
{
/* Build ex9 table. */
table->relax_round = NDS32_RELAX_EX9_BUILD_ROUND;
/* Initialize ex9 hash table. */
if (!nds32_elf_ex9_init ())
return;
/* Build ex9 table. */
nds32_elf_relax_stub (TRUE);
/* Relocation for .ex9.itable. */
lang_do_assignments (lang_assigning_phase_enum);
nds32_elf_ex9_reloc_jmp (&link_info);
}
nds32_elf_ex9_import_table (&link_info);
/* Replace with ex9.it. */
table->relax_round = NDS32_RELAX_EX9_REPLACE_ROUND;
table->relax_status |= NDS32_RELAX_EX9_DONE;
nds32_elf_relax_stub (TRUE);
}
}
EOF
# Define some shell vars to insert bits of code into the standard elf
# parse_args and list_options functions.
#
PARSE_AND_LIST_PROLOGUE='
#define OPTION_BASELINE 301
#define OPTION_ELIM_GC_RELOCS (OPTION_BASELINE + 1)
#define OPTION_FP_AS_GP (OPTION_BASELINE + 2)
#define OPTION_NO_FP_AS_GP (OPTION_BASELINE + 3)
#define OPTION_REDUCE_FP_UPDATE (OPTION_BASELINE + 4)
#define OPTION_NO_REDUCE_FP_UPDATE (OPTION_BASELINE + 5)
#define OPTION_EXPORT_SYMBOLS (OPTION_BASELINE + 6)
/* These are only available to ex9. */
#if defined NDS32_EX9_EXT
#define OPTION_EX9_BASELINE 320
#define OPTION_EX9_TABLE (OPTION_EX9_BASELINE + 1)
#define OPTION_NO_EX9_TABLE (OPTION_EX9_BASELINE + 2)
#define OPTION_EXPORT_EX9 (OPTION_EX9_BASELINE + 3)
#define OPTION_IMPORT_EX9 (OPTION_EX9_BASELINE + 4)
#define OPTION_UPDATE_EX9 (OPTION_EX9_BASELINE + 5)
#define OPTION_EX9_LIMIT (OPTION_EX9_BASELINE + 6)
#define OPTION_EX9_LOOP (OPTION_EX9_BASELINE + 7)
#endif
/* These are only available to link-time ifc. */
#if defined NDS32_IFC_EXT
#define OPTION_IFC_BASELINE 340
#define OPTION_JUMP_IFC (OPTION_IFC_BASELINE + 1)
#define OPTION_NO_JUMP_IFC (OPTION_IFC_BASELINE + 2)
#define OPTION_IFC_LOOP (OPTION_IFC_BASELINE + 3)
#endif
'
PARSE_AND_LIST_LONGOPTS='
{ "mfp-as-gp", no_argument, NULL, OPTION_FP_AS_GP},
{ "mno-fp-as-gp", no_argument, NULL, OPTION_NO_FP_AS_GP},
{ "mgen-symbol-ld-script", required_argument, NULL, OPTION_EXPORT_SYMBOLS},
/* These are deprecated options. Remove them in the future. */
{ "mrelax-reduce-fp-update", no_argument, NULL, OPTION_REDUCE_FP_UPDATE},
{ "mrelax-no-reduce-fp-update", no_argument, NULL, OPTION_NO_REDUCE_FP_UPDATE},
{ "mbaseline", required_argument, NULL, OPTION_BASELINE},
{ "meliminate-gc-relocs", no_argument, NULL, OPTION_ELIM_GC_RELOCS},
{ "mrelax-omit-fp", no_argument, NULL, OPTION_FP_AS_GP},
{ "mrelax-no-omit-fp", no_argument, NULL, OPTION_NO_FP_AS_GP},
{ "mgen-symbol-ld-script", required_argument, NULL, OPTION_EXPORT_SYMBOLS},
/* These are specific optioins for ex9-ext support. */
#if defined NDS32_EX9_EXT
{ "mex9", no_argument, NULL, OPTION_EX9_TABLE},
{ "mno-ex9", no_argument, NULL, OPTION_NO_EX9_TABLE},
{ "mexport-ex9", required_argument, NULL, OPTION_EXPORT_EX9},
{ "mimport-ex9", required_argument, NULL, OPTION_IMPORT_EX9},
{ "mupdate-ex9", no_argument, NULL, OPTION_UPDATE_EX9},
{ "mex9-limit", required_argument, NULL, OPTION_EX9_LIMIT},
{ "mex9-loop-aware", no_argument, NULL, OPTION_EX9_LOOP},
#endif
/* These are specific optioins for ifc-ext support. */
#if defined NDS32_IFC_EXT
{ "mifc", no_argument, NULL, OPTION_JUMP_IFC},
{ "mno-ifc", no_argument, NULL, OPTION_NO_JUMP_IFC},
{ "mifc-loop-aware", no_argument, NULL, OPTION_IFC_LOOP},
#endif
'
PARSE_AND_LIST_OPTIONS='
fprintf (file, _("\
--m[no-]fp-as-gp Disable/enable fp-as-gp relaxation\n\
--mexport-symbols=FILE Exporting symbols in linker script\n\
"));
#if defined NDS32_EX9_EXT
fprintf (file, _("\
--m[no-]ex9 Disable/enable link-time EX9 relaxation\n\
--mexport-ex9=FILE Export EX9 table after linking\n\
--mimport-ex9=FILE Import Ex9 table for EX9 relaxation\n\
--mupdate-ex9 Update existing EX9 table\n\
--mex9-limit=NUM Maximum number of entries in ex9 table\n\
--mex9-loop-aware Avoid generate EX9 instruction inside loop\n\
"));
#endif
#if defined NDS32_IFC_EXT
fprintf (file, _("\
--m[no-]ifc Disable/enable link-time IFC optimization\n\
--mifc-loop-aware Avoid generate IFC instruction inside loop\n\
"));
#endif
'
PARSE_AND_LIST_ARGS_CASES='
case OPTION_BASELINE:
einfo ("%P: --mbaseline is not used anymore.\n");
break;
case OPTION_ELIM_GC_RELOCS:
eliminate_gc_relocs = 1;
break;
case OPTION_FP_AS_GP:
case OPTION_NO_FP_AS_GP:
relax_fp_as_gp = (optc == OPTION_FP_AS_GP);
break;
case OPTION_REDUCE_FP_UPDATE:
case OPTION_NO_REDUCE_FP_UPDATE:
einfo ("%P: --relax-[no-]reduce-fp-updat is not used anymore.\n");
break;
case OPTION_EXPORT_SYMBOLS:
if (!optarg)
einfo (_("Missing file for --mgen-symbol-ld-script.\n"), optarg);
if(strcmp (optarg, "-") == 0)
sym_ld_script = stdout;
else
{
sym_ld_script = fopen (optarg, FOPEN_WT);
if(sym_ld_script == NULL)
einfo (_("%P%F: cannot open map file %s: %E.\n"), optarg);
}
break;
#if defined NDS32_EX9_EXT
case OPTION_EX9_TABLE:
target_optimize = target_optimize | NDS32_RELAX_EX9_ON;
break;
case OPTION_NO_EX9_TABLE:
target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
break;
case OPTION_EXPORT_EX9:
if (!optarg)
einfo (_("Missing file for --mexport-ex9=<file>.\n"));
if(strcmp (optarg, "-") == 0)
ex9_export_file = stdout;
else
{
ex9_export_file = fopen (optarg, FOPEN_WT);
if(ex9_export_file == NULL)
einfo (_("ERROR %P%F: cannot open ex9 export file %s.\n"), optarg);
}
break;
case OPTION_IMPORT_EX9:
if (!optarg)
einfo (_("Missing file for --mimport-ex9=<file>.\n"));
ex9_import_file = fopen (optarg, "r+");
if(ex9_import_file == NULL)
einfo (_("ERROR %P%F: cannot open ex9 import file %s.\n"), optarg);
break;
case OPTION_UPDATE_EX9:
update_ex9_table = 1;
break;
case OPTION_EX9_LIMIT:
if (optarg)
{
ex9_limit = atoi (optarg);
if (ex9_limit > 511 || ex9_limit < 1)
{
einfo (_("ERROR: the range of ex9_limit must between 1 and 511\n"));
exit (1);
}
}
break;
case OPTION_EX9_LOOP:
target_optimize = target_optimize | NDS32_RELAX_EX9_ON;
ex9_loop_aware = 1;
break;
#endif
#if defined NDS32_IFC_EXT
case OPTION_JUMP_IFC:
target_optimize = target_optimize | NDS32_RELAX_JUMP_IFC_ON;
break;
case OPTION_NO_JUMP_IFC:
target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON);
break;
case OPTION_IFC_LOOP:
target_optimize = target_optimize | NDS32_RELAX_JUMP_IFC_ON;
ifc_loop_aware = 1;
break;
#endif
'
LDEMUL_AFTER_OPEN=nds32_elf_after_open
LDEMUL_AFTER_PARSE=nds32_elf_after_parse
LDEMUL_AFTER_ALLOCATION=nds32_elf_after_allocation
LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=nds32_elf_create_output_section_statements
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