ld/emultempl/nds32elf.em - third_party/binutils-gdb - Git at Google

 # This shell script emits a C file. -*- C -*-
 # Copyright (C) 2012-2016 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 (bfd_link_relocatable (&link_info))
     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 (bfd_link_pic (&link_info))
     {
       target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON);
       target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
     }

   gld${EMULATION_NAME}_after_parse ();
 }

 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);
 	}

 #if defined NDS32_EX9_EXT
       /* Append .ex9.itable section in the last input object file.  */
       if (abfd->link_next == NULL && (target_optimize & NDS32_RELAX_EX9_ON))
 	{
 	  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;
 	      itable->size = 0x1000;
 	      itable->contents = bfd_zalloc (abfd, itable->size);

 	      /* 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);
 	    }
 	}
 #endif
     }

   /* Check object files if the target is dynamic linked executable
      or shared object.  */
   if (elf_hash_table (&link_info)->dynamic_sections_created
       || bfd_link_pic (&link_info))
     {
       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 (bfd_link_pic (&link_info))
 		{
 		  /* 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.  */
 		  /* TODO: This may support in the future.  */
 		  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_after_allocation (void)
 {
   if (target_optimize & NDS32_RELAX_EX9_ON
       || (ex9_import_file != NULL && update_ex9_table == 1))
     {
       /* Initialize ex9 hash table.  */
       if (!nds32_elf_ex9_init ())
         return;
     }

   /* 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 ();
 }

 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},
   { "mexport-symbols", 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 --mexport-symbols.\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, "wb");
 	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, "rb+");
     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
	# This shell script emits a C file. -- C --
	# Copyright (C) 2012-2016 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 (bfd_link_relocatable (&link_info))
	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 (bfd_link_pic (&link_info))
	{
	target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON);
	target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
	}

	gld${EMULATION_NAME}_after_parse ();
	}

	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);
	}

	#if defined NDS32_EX9_EXT
	/* Append .ex9.itable section in the last input object file. */
	if (abfd->link_next == NULL && (target_optimize & NDS32_RELAX_EX9_ON))
	{
	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;
	itable->size = 0x1000;
	itable->contents = bfd_zalloc (abfd, itable->size);

	/* 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);
	}
	}
	#endif
	}

	/* Check object files if the target is dynamic linked executable
	or shared object. */
	if (elf_hash_table (&link_info)->dynamic_sections_created
	\|\| bfd_link_pic (&link_info))
	{
	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 (bfd_link_pic (&link_info))
	{
	/* 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. */
	/* TODO: This may support in the future. */
	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_after_allocation (void)
	{
	if (target_optimize & NDS32_RELAX_EX9_ON
	\|\| (ex9_import_file != NULL && update_ex9_table == 1))
	{
	/* Initialize ex9 hash table. */
	if (!nds32_elf_ex9_init ())
	return;
	}

	/* 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 ();
	}

	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},
	{ "mexport-symbols", 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 --mexport-symbols.\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, "wb");
	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, "rb+");
	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