[PATCH 4/5] New target port: Andes 'nds32'. (ld)

Kuan-Lin Chen kuanlinchentw@gmail.com
Fri Jul 12 03:21:00 GMT 2013


2013/7/10 Joseph S. Myers <joseph@codesourcery.com>:
> As with the assembler patch, this patch is missing documentation; you have
> architecture-specific linker options, so need to document them in
> ld.texinfo.
>
>>       * scripttempl/nds32elf.sc}: New file for nds32 support.
>
> Please don't add new variant copies of elf.sc like this.  By forking
> elf.sc you are, as just one example, missing DWARF 3 sections that elf.sc
> gets from DWARF.sc.  Of course that individual issue could be fixed by
> using DWARF.sc from this script, but instead it's better to make elf.sc
> handle more variables as needed so it can do what you need for your port.
> If it really isn't possible to use elf.sc, you need to explain why, and
> justify every difference between elf.sc and your script as being actually
> necessary for your port rather than just resulting from having forked an
> old version of elf.sc and not merged in more recent elf.sc changes since
> then.
>

Hi, Joseph

I've fixed this patch according to your suggestion.

1. Add architecture-specific linker options in ld.texinfo.
2. Merge nds32elf.sc in elf.sc and comment in it.
3. Remove all extern variables defined in bfd/elf32-nds32.c, and pass
   the target options by the structure.

Note: this patch may be modified in the feature, because the configure issue
      that you mention in
<http://sourceware.org/ml/binutils/2013-07/msg00089.html>.

Thank you for your great help.

---
2013-07-11 Kuan-Lin Chen <kuanlinchentw@gmail.com>
ld/
	* Makefile.am (ALL_EMULATION_SOURCES): Add nds32 target.
	* configure.tgt (nds32*le-*-elf*, nds32*be-*-elf*, nds32*le-*-linux-gnu*,
	nds32*be-*-linux-gnu*): Add nds32 target.
	* emulparams/nds32belf.sh: New file for nds32 support.
	* emulparams/nds32belf_linux.sh: New file for nds32 support.
	* emulparams/nds32elf.sh: New file for nds32 support.
	* emulparams/nds32elf_linux.sh: New file for nds32 support.
	* emultempl/nds32elf.em: New file for nds32 support.
	* scripttempl/nds32elf.sc}: New file for nds32 support.	
---
diff --git a/ld/Makefile.am b/ld/Makefile.am
index eaf82b6..3b226cf 100644
--- a/ld/Makefile.am
+++ b/ld/Makefile.am
@@ -396,6 +396,10 @@ ALL_EMULATION_SOURCES = \
 	emsp430xW425.c \
 	emsp430xW427.c \
 	emsp430X.c \
+	ends32elf.c \
+	ends32elf_linux.c \
+	ends32belf.c \
+	ends32belf_linux.c \
 	enews.c \
 	ens32knbsd.c \
 	eor32.c \
@@ -1750,6 +1754,22 @@ emsp430X.c: $(srcdir)/emulparams/msp430all.sh \
   $(ELF_GEN_DEPS) $(srcdir)/scripttempl/elf32msp430.sc \
   ${GEN_DEPENDS}
 	${GENSCRIPTS} msp430X "$(tdir_msp430X)" msp430all
+ends32elf.c: $(srcdir)/emulparams/nds32elf.sh \
+  $(ELF_DEPS) $(srcdir)/emultempl/nds32elf.em \
+  $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
+	${GENSCRIPTS} nds32elf "$(tdir_nds32)"
+ends32belf.c: $(srcdir)/emulparams/nds32belf.sh \
+  $(ELF_DEPS) $(srcdir)/emultempl/nds32elf.em \
+  $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
+	${GENSCRIPTS} nds32belf "$(tdir_nds32belf)"
+ends32elf_linux.c: $(srcdir)/emulparams/nds32elf_linux.sh \
+  $(ELF_DEPS) $(srcdir)/emultempl/nds32elf.em \
+  $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
+	${GENSCRIPTS} nds32elf_linux "$(tdir_nds32elf_linux)"
+ends32belf_linux.c: $(srcdir)/emulparams/nds32belf_linux.sh \
+  $(ELF_DEPS) $(srcdir)/emultempl/nds32elf.em \
+  $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
+	${GENSCRIPTS} nds32belf_linux "$(tdir_nds32belf_linux)"
 enews.c: $(srcdir)/emulparams/news.sh \
   $(srcdir)/emultempl/generic.em $(srcdir)/scripttempl/aout.sc ${GEN_DEPENDS}
 	${GENSCRIPTS} news "$(tdir_news)"
diff --git a/ld/configure.tgt b/ld/configure.tgt
index c0291c8..1a38aff 100644
--- a/ld/configure.tgt
+++ b/ld/configure.tgt
@@ -512,6 +512,10 @@ mt-*elf)                targ_emul=elf32mt
 msp430-*-*)             targ_emul=msp430x110
                         targ_extra_emuls="msp430x112 msp430x1101
msp430x1111 msp430x1121 msp430x1122 msp430x1132 msp430x122 msp430x123
msp430x1222 msp430x1232 msp430x133 msp430x135 msp430x1331 msp430x1351
msp430x147 msp430x148 msp430x149 msp430x155 msp430x156 msp430x157
msp430x167 msp430x168 msp430x169 msp430x1610 msp430x1611 msp430x1612
msp430x2101 msp430x2111 msp430x2121 msp430x2131 msp430x311 msp430x312
msp430x313 msp430x314 msp430x315 msp430x323 msp430x325 msp430x336
msp430x337 msp430x412 msp430x413 msp430x415 msp430x417 msp430xE423
msp430xE425 msp430xE427 msp430xW423 msp430xW425 msp430xW427
msp430xG437 msp430xG438 msp430xG439 msp430x435 msp430x436 msp430x437
msp430x447 msp430x448 msp430x449 msp430X"
 			;;
+nds32*le-*-elf*)	targ_emul=nds32elf ;;
+nds32*be-*-elf*)	targ_emul=nds32belf ;;
+nds32*le-*-linux-gnu*)	targ_emul=nds32elf_linux ;;
+nds32*be-*-linux-gnu*)	targ_emul=nds32belf_linux ;;
 nios2*-*-*)		targ_emul=nios2elf ;;
 ns32k-pc532-mach* | ns32k-pc532-ux*)  targ_emul=pc532macha ;;
 ns32k-*-netbsd* | ns32k-pc532-lites*) targ_emul=ns32knbsd
diff --git a/ld/emulparams/nds32belf.sh b/ld/emulparams/nds32belf.sh
new file mode 100644
index 0000000..eee48fa
--- /dev/null
+++ b/ld/emulparams/nds32belf.sh
@@ -0,0 +1,2 @@
+. ${srcdir}/emulparams/nds32elf.sh
+OUTPUT_FORMAT="$BIG_OUTPUT_FORMAT"
diff --git a/ld/emulparams/nds32belf_linux.sh b/ld/emulparams/nds32belf_linux.sh
new file mode 100644
index 0000000..bc99e38
--- /dev/null
+++ b/ld/emulparams/nds32belf_linux.sh
@@ -0,0 +1,2 @@
+. ${srcdir}/emulparams/nds32elf_linux.sh
+OUTPUT_FORMAT="$BIG_OUTPUT_FORMAT"
diff --git a/ld/emulparams/nds32elf.sh b/ld/emulparams/nds32elf.sh
new file mode 100644
index 0000000..3668851
--- /dev/null
+++ b/ld/emulparams/nds32elf.sh
@@ -0,0 +1,35 @@
+DEFAULT_TEXT_START_ADDR=0
+DEFAULT_STACK_START_ADDR=0
+MACHINE=
+SCRIPT_NAME=nds32elf
+TEMPLATE_NAME=elf32
+EXTRA_EM_FILE=nds32elf
+BIG_OUTPUT_FORMAT="elf32-nds32be"
+LITTLE_OUTPUT_FORMAT="elf32-nds32le"
+OUTPUT_FORMAT="$LITTLE_OUTPUT_FORMAT"
+if [ "${DEFAULT_TEXT_START_ADDR}" = "0" ]; then
+    TEXT_START_ADDR=0x500000
+else
+    TEXT_START_ADDR=${DEFAULT_TEXT_START_ADDR}
+fi
+ARCH=nds32
+MACHINE=
+MAXPAGESIZE=0x20
+EMBEDDED=yes
+COMMONPAGESIZE=0x20
+
+# This sets the stack to the top of simulator memory (32MB).
+#OTHER_END_SYMBOLS='PROVIDE (_stack = 0x2000000);'
+# This sets the stack to the top of simulator memory (8MB).
+#OTHER_END_SYMBOLS='PROVIDE (_stack = 0x800000);'
+# This sets the stack to the top of simulator memory (48MB).
+
+if [ "${DEFAULT_STACK_START_ADDR}" = "0" ]; then
+    OTHER_END_SYMBOLS='PROVIDE (_stack = 0x3000000);'
+else
+    OTHER_END_SYMBOLS="PROVIDE (_stack = ${DEFAULT_STACK_START_ADDR});"
+fi
+
+# Instruct genscripts.sh not to compile scripts in by COMPILE_IN
+# in order to use external linker scripts files.
+EMULATION_LIBPATH=
diff --git a/ld/emulparams/nds32elf_linux.sh b/ld/emulparams/nds32elf_linux.sh
new file mode 100644
index 0000000..6d89f79
--- /dev/null
+++ b/ld/emulparams/nds32elf_linux.sh
@@ -0,0 +1,36 @@
+DEFAULT_TEXT_START_ADDR=0
+DEFAULT_STACK_START_ADDR=0
+MACHINE=
+SCRIPT_NAME=nds32elf
+TEMPLATE_NAME=elf32
+EXTRA_EM_FILE=nds32elf
+BIG_OUTPUT_FORMAT="elf32-nds32be-linux"
+LITTLE_OUTPUT_FORMAT="elf32-nds32le-linux"
+OUTPUT_FORMAT="$LITTLE_OUTPUT_FORMAT"
+LIB_PATH="=/usr/local/lib:=/lib:=/usr/lib/"
+
+if [ "${DEFAULT_TEXT_START_ADDR}" = "0" ]; then
+    TEXT_START_ADDR=0x8000
+else
+    TEXT_START_ADDR=${DEFAULT_TEXT_START_ADDR}
+fi
+
+ARCH=nds32
+MACHINE=
+MAXPAGESIZE="CONSTANT (MAXPAGESIZE)"
+COMMONPAGESIZE="CONSTANT (COMMONPAGESIZE)"
+
+# Hmmm, there's got to be a better way.  This sets the stack to the
+# top of simulator memory (32MB).
+if [ "${DEFAULT_STACK_START_ADDR}" = "0" ]; then
+    OTHER_RELOCATING_SECTIONS='PROVIDE (_stack = 0x2000000);'
+else
+    OTHER_RELOCATING_SECTIONS="PROVIDE (_stack = ${DEFAULT_STACK_START_ADDR});"
+fi
+
+GENERATE_SHLIB_SCRIPT=yes
+GENERATE_PIE_SCRIPT=yes
+
+# Instruct genscripts.sh not to compile scripts in by COMPILE_IN
+# in order to use external linker scripts files.
+EMULATION_LIBPATH=
diff --git a/ld/emultempl/nds32elf.em b/ld/emultempl/nds32elf.em
new file mode 100644
index 0000000..9bdbfc5
--- /dev/null
+++ b/ld/emultempl/nds32elf.em
@@ -0,0 +1,451 @@
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# This file is sourced from elf32.em, and defines extra nds32-elf
+# specific routines.
+#
+cat >>e${EMULATION_NAME}.c <<EOF
+
+#include "libbfd.h"
+#include "elf-bfd.h"
+#include "elf/nds32.h"
+#include "elf32-nds32.h"
+
+
+static int relax_omit_fp = 1;	/* --mrelax-omit-fp  */
+static int relax_reduce_fp_update = 1;	/* --mrelax-reduce-fp-update  */
+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_omit_fp,
+				     relax_reduce_fp_update,
+				     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_omit_fp = 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 ((target_optimize & NDS32_RELAX_EX9_ON)
+	  && abfd->link_next == NULL)
+	{
+	  asection *itable;
+	  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->size = 0x1000;
+	    itable->alignment_power = 2;
+	    itable->contents = bfd_zalloc (abfd, itable->size);
+	  }
+	}
+    }
+
+  /* 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_omit_fp = 0;
+		}
+	    }
+	}
+      /* Turn off relax when building shared object or PIE
+	 until we can support their relaxation.  */
+    }
+
+  /* Call the standard elf routine.  */
+  gld${EMULATION_NAME}_after_open ();
+}
+
+static void
+nds32_elf_after_allocation (void)
+{
+  /* Call default after allocation callback.
+     1. This is where relaxation is done.
+     2. It calls gld${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 ();
+  struct elf_nds32_link_hash_table *table;
+  table = nds32_elf_hash_table (&link_info);
+
+  if (!table)
+    return;
+
+  /* Use IFC */
+  if ((target_optimize & NDS32_RELAX_JUMP_IFC_ON)
+      && !(relax_status & NDS32_RELAX_JUMP_IFC_DONE))
+    {
+      bfd_boolean relax;
+      table->relax_round = NDS32_RELAX_JUMP_IFC_ROUND;
+      /* Traverse all sections to build j and jal list.  */
+      relax = TRUE;
+      one_lang_size_sections_pass (&relax, FALSE);
+      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.  */
+      relax = FALSE;
+      one_lang_size_sections_pass (&relax, 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)
+      && !(relax_status & NDS32_RELAX_EX9_DONE))
+    {
+      bfd_boolean relax;
+
+      /* Ex9 entry point.  */
+      table->relax_round = NDS32_RELAX_EX9_BUILD_ROUND;
+
+      /* Initialize ex9 hash table.  */
+      if (!nds32_elf_ex9_init ())
+	return;
+
+      relax = TRUE;
+      /* Build ex9 instruction table.  */
+      one_lang_size_sections_pass (&relax, FALSE);
+      nds32_elf_ex9_finish (&link_info, TRUE);
+      relax = TRUE;
+      /* Replace with ex9.it.  */
+      one_lang_size_sections_pass (&relax, FALSE);
+      table->relax_round = NDS32_RELAX_NONE_ROUND;
+      /* Relocation for .ex9.itable.  */
+      nds32_elf_ex9_reloc_jmp (&link_info);
+
+      /* 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"));
+
+    }
+
+  /* Import ex9 table.  */
+  if (ex9_import_file != NULL
+      && !(relax_status = NDS32_RELAX_EX9_DONE))
+    {
+      bfd_boolean relax;
+
+      /* Build ex9 table.  */
+      if (update_ex9_table == 1)
+	{
+	  table->relax_round = NDS32_RELAX_EX9_BUILD_ROUND;
+	  /* Initialize ex9 hash table.  */
+	  if (!nds32_elf_ex9_init ())
+	    return;
+	  /* Build ex9 table.  */
+	  relax = TRUE;
+	  one_lang_size_sections_pass (&relax, FALSE);
+	  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;
+      relax_status |= NDS32_RELAX_EX9_DONE;
+      relax = TRUE;
+      one_lang_size_sections_pass (&relax, FALSE);
+      table->relax_round = NDS32_RELAX_NONE_ROUND;
+    }
+}
+
+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_ISA_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_ISA_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 internal options.  */
+  { "mrelax-reduce-fp-update", no_argument, NULL, OPTION_REDUCE_FP_UPDATE},
+  { "mrelax-no-reduce-fp-update", no_argument, NULL,
OPTION_NO_REDUCE_FP_UPDATE},
+  /* These are obsolete options.  Remove them in the future.  */
+  { "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},
+#if defined NDS32_ISA_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
+
+#if defined NDS32_ISA_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_ISA_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_ISA_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_omit_fp = (optc == OPTION_FP_AS_GP);
+    break;
+  case OPTION_REDUCE_FP_UPDATE:
+  case OPTION_NO_REDUCE_FP_UPDATE:
+    relax_reduce_fp_update = (optc == OPTION_REDUCE_FP_UPDATE);
+    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_ISA_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_ISA_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
diff --git a/ld/scripttempl/nds32elf.sc b/ld/scripttempl/nds32elf.sc
new file mode 100644
index 0000000..5c926fa
--- /dev/null
+++ b/ld/scripttempl/nds32elf.sc
@@ -0,0 +1,618 @@
+#  This file is variant of elf.sc.  For nds32, because the data will be
+#  classified into different sections according to their size, this script
+#  describe these sections map.  The order is ".sdata_d, .sdata_w, .sdata_h,
+#  .sdata_b, , sdata_f, .sbss_f, .sbss_b, .sbss_h, .sbss_w, .sbss_d".  In
+#  this order we do not have to consider the alignment issue between these
+#  sections.
+
+if test -n "$NOP"; then
+  FILL="=$NOP"
+else
+  FILL=
+fi
+
+test -z "$RODATA_NAME" && RODATA_NAME=rodata
+test -z "$SDATA_NAME" && SDATA_NAME=sdata
+test -z "$SBSS_NAME" && SBSS_NAME=sbss
+test -z "$BSS_NAME" && BSS_NAME=bss
+test -z "$ENTRY" && ENTRY=${USER_LABEL_PREFIX}_start
+test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
+test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
+if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else
OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
+test -z "${ELFSIZE}" && ELFSIZE=32
+test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8"
+test "$LD_FLAG" = "N" && DATA_ADDR=.
+test -z "${ETEXT_NAME}" && ETEXT_NAME=${USER_LABEL_PREFIX}etext
+test -n "$CREATE_SHLIB$CREATE_PIE" && test -n "$SHLIB_DATA_ADDR" &&
COMMONPAGESIZE=""
+test -z "$CREATE_SHLIB$CREATE_PIE" && test -n "$DATA_ADDR" && COMMONPAGESIZE=""
+test -n "$RELRO_NOW" && unset SEPARATE_GOTPLT
+test -z "$ATTRS_SECTIONS" && ATTRS_SECTIONS=".gnu.attributes 0 : {
KEEP (*(.gnu.attributes)) }"
+DATA_SEGMENT_ALIGN="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
+DATA_SEGMENT_RELRO_END=""
+DATA_SEGMENT_END=""
+if test -n "${COMMONPAGESIZE}"; then
+  DATA_SEGMENT_ALIGN="ALIGN (${SEGMENT_SIZE}) - ((${MAXPAGESIZE} - .)
& (${MAXPAGESIZE} - 1)); . = DATA_SEGMENT_ALIGN (${MAXPAGESIZE},
${COMMONPAGESIZE})"
+  DATA_SEGMENT_END=". = DATA_SEGMENT_END (.);"
+  DATA_SEGMENT_RELRO_END=". = DATA_SEGMENT_RELRO_END
(${SEPARATE_GOTPLT-0}, .);"
+fi
+if test -z "${INITIAL_READONLY_SECTIONS}${CREATE_SHLIB}"; then
+  INITIAL_READONLY_SECTIONS=".interp       ${RELOCATING-0} : { *(.interp) }"
+fi
+if test -z "$PLT"; then
+  IPLT=".iplt         ${RELOCATING-0} : { *(.iplt) }"
+  PLT=".plt          ${RELOCATING-0} : { *(.plt)${IREL_IN_PLT+ *(.iplt)} }
+  ${IREL_IN_PLT-$IPLT}"
+fi
+test -n "${DATA_PLT-${BSS_PLT-text}}" && TEXT_PLT=
+if test -z "$GOT"; then
+  if test -z "$SEPARATE_GOTPLT"; then
+    GOT=".got          ${RELOCATING-0} : { *(.got.plt) *(.igot.plt)
*(.got) *(.igot) }"
+  else
+    GOT=".got          ${RELOCATING-0} : { *(.got) *(.igot) }"
+    GOTPLT=".got.plt      ${RELOCATING-0} : { *(.got.plt)  *(.igot.plt) }"
+  fi
+fi
+REL_IFUNC=".rel.ifunc    ${RELOCATING-0} : { *(.rel.ifunc) }"
+RELA_IFUNC=".rela.ifunc   ${RELOCATING-0} : { *(.rela.ifunc) }"
+REL_IPLT=".rel.iplt     ${RELOCATING-0} :
+    {
+      ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN
(${USER_LABEL_PREFIX}__rel_iplt_start = .);}}
+      *(.rel.iplt)
+      ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN
(${USER_LABEL_PREFIX}__rel_iplt_end = .);}}
+    }"
+RELA_IPLT=".rela.iplt    ${RELOCATING-0} :
+    {
+      ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN
(${USER_LABEL_PREFIX}__rela_iplt_start = .);}}
+      *(.rela.iplt)
+      ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN
(${USER_LABEL_PREFIX}__rela_iplt_end = .);}}
+    }"
+DYNAMIC=".dynamic      ${RELOCATING-0} : { *(.dynamic) }"
+RODATA=".${RODATA_NAME}       ${RELOCATING-0} : {
*(.${RODATA_NAME}${RELOCATING+ .${RODATA_NAME}.* .gnu.linkonce.r.*})
}"
+DATARELRO=".data.rel.ro : { *(.data.rel.ro.local*
.gnu.linkonce.d.rel.ro.local.*) *(.data.rel.ro .data.rel.ro.*
.gnu.linkonce.d.rel.ro.*) }"
+DISCARDED="/DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) }"
+if test -z "${NO_SMALL_DATA}"; then
+  SBSS=".${SBSS_NAME}         ${RELOCATING-0} :
+  {
+    ${RELOCATING+${SBSS_START_SYMBOLS}}
+    ${CREATE_SHLIB+*(.${SBSS_NAME}2 .${SBSS_NAME}2.* .gnu.linkonce.sb2.*)}
+    *(.dyn${SBSS_NAME})
+    *(.${SBSS_NAME}${RELOCATING+ .${SBSS_NAME}.* .gnu.linkonce.sb.*})
+    *(.scommon)
+    ${RELOCATING+${SBSS_END_SYMBOLS}}
+  }
+  .sbss_b         ${RELOCATING-0} :
+  {
+    *(.sbss_b${RELOCATING+ .sbss_b.*})
+    *(.scommon_b${RELOCATING+ .scommon_b.*})
+    ${RELOCATING+. = ALIGN(2);}
+  }
+  .sbss_h         ${RELOCATING-0} :
+  {
+    *(.sbss_h${RELOCATING+ .sbss_h.*})
+    *(.scommon_h${RELOCATING+ .scommon_h.*})
+    ${RELOCATING+. = ALIGN(4);}
+  }
+  .sbss_w         ${RELOCATING-0} :
+  {
+    *(.sbss_w${RELOCATING+ .sbss_w.*})
+    *(.scommon_w${RELOCATING+ .scommon_w.*})
+    *(.dynsbss)
+    *(.scommon)
+    ${RELOCATING+. = ALIGN(8);}
+  }
+  .sbss_d         ${RELOCATING-0} :
+  {
+    *(.sbss_d${RELOCATING+ .sbss_d.*})
+    *(.scommon_d${RELOCATING+ .scommon_d.*})
+    ${RELOCATING+PROVIDE (__sbss_end = .);}
+    ${RELOCATING+PROVIDE (___sbss_end = .);}
+  }"
+  SBSS2=".${SBSS_NAME}2        ${RELOCATING-0} : {
*(.${SBSS_NAME}2${RELOCATING+ .${SBSS_NAME}2.* .gnu.linkonce.sb2.*})
}"
+  SDATA="/* We want the small data sections together, so
single-instruction offsets
+     can access them all, and initialized data all before uninitialized, so
+     we can shorten the on-disk segment size.  */
+  .${SDATA_NAME}        ${RELOCATING-0} :
+  {
+    ${RELOCATING+${SDATA_START_SYMBOLS}}
+    ${CREATE_SHLIB+*(.${SDATA_NAME}2 .${SDATA_NAME}2.* .gnu.linkonce.s2.*)}
+    *(.${SDATA_NAME}${RELOCATING+ .${SDATA_NAME}.* .gnu.linkonce.s.*})
+  }
+  .sdata_d        ${RELOCATING-0} :
+  {
+    *(.sdata_d${RELOCATING+ .sdata_d.*})
+  }
+  .sdata_w        ${RELOCATING-0} :
+  {
+    *(.sdata_w${RELOCATING+ .sdata_w.*})
+  }
+  .sdata_h        ${RELOCATING-0} :
+  {
+    *(.sdata_h${RELOCATING+ .sdata_h.*})
+  }
+  .sdata_b        ${RELOCATING-0} :
+  {
+    *(.sdata_b${RELOCATING+ .sdata_b.*})
+  }
+  .sdata_f        ${RELOCATING-0} :
+  {
+    *(.sdata_f${RELOCATING+ .sdata_f.*})
+  }"
+  SDATA2=".${SDATA_NAME}2       ${RELOCATING-0} :
+  {
+    ${RELOCATING+${SDATA2_START_SYMBOLS}}
+    *(.${SDATA_NAME}2${RELOCATING+ .${SDATA_NAME}2.* .gnu.linkonce.s2.*})
+  }"
+  REL_SDATA=".rel.${SDATA_NAME}    ${RELOCATING-0} : {
*(.rel.${SDATA_NAME}${RELOCATING+ .rel.${SDATA_NAME}.*
.rel.gnu.linkonce.s.*}) }
+  .rela.${SDATA_NAME}   ${RELOCATING-0} : {
*(.rela.${SDATA_NAME}${RELOCATING+ .rela.${SDATA_NAME}.*
.rela.gnu.linkonce.s.*}) }"
+  REL_SBSS=".rel.${SBSS_NAME}     ${RELOCATING-0} : {
*(.rel.${SBSS_NAME}${RELOCATING+ .rel.${SBSS_NAME}.*
.rel.gnu.linkonce.sb.*}) }
+  .rela.${SBSS_NAME}    ${RELOCATING-0} : {
*(.rela.${SBSS_NAME}${RELOCATING+ .rela.${SBSS_NAME}.*
.rela.gnu.linkonce.sb.*}) }"
+  REL_SDATA2=".rel.${SDATA_NAME}2   ${RELOCATING-0} : {
*(.rel.${SDATA_NAME}2${RELOCATING+ .rel.${SDATA_NAME}2.*
.rel.gnu.linkonce.s2.*}) }
+  .rela.${SDATA_NAME}2  ${RELOCATING-0} : {
*(.rela.${SDATA_NAME}2${RELOCATING+ .rela.${SDATA_NAME}2.*
.rela.gnu.linkonce.s2.*}) }"
+  REL_SBSS2=".rel.${SBSS_NAME}2    ${RELOCATING-0} : {
*(.rel.${SBSS_NAME}2${RELOCATING+ .rel.${SBSS_NAME}2.*
.rel.gnu.linkonce.sb2.*}) }
+  .rela.${SBSS_NAME}2   ${RELOCATING-0} : {
*(.rela.${SBSS_NAME}2${RELOCATING+ .rela.${SBSS_NAME}2.*
.rela.gnu.linkonce.sb2.*}) }"
+else
+  NO_SMALL_DATA=" "
+fi
+if test -z "${DATA_GOT}"; then
+  if test -n "${NO_SMALL_DATA}"; then
+    DATA_GOT=" "
+  fi
+fi
+if test -z "${SDATA_GOT}"; then
+  if test -z "${NO_SMALL_DATA}"; then
+    SDATA_GOT=" "
+  fi
+fi
+test -n "$SEPARATE_GOTPLT" && SEPARATE_GOTPLT=" "
+test "${LARGE_SECTIONS}" = "yes" && REL_LARGE="
+  .rel.ldata    ${RELOCATING-0} : { *(.rel.ldata${RELOCATING+
.rel.ldata.* .rel.gnu.linkonce.l.*}) }
+  .rela.ldata   ${RELOCATING-0} : { *(.rela.ldata${RELOCATING+
.rela.ldata.* .rela.gnu.linkonce.l.*}) }
+  .rel.lbss     ${RELOCATING-0} : { *(.rel.lbss${RELOCATING+
.rel.lbss.* .rel.gnu.linkonce.lb.*}) }
+  .rela.lbss    ${RELOCATING-0} : { *(.rela.lbss${RELOCATING+
.rela.lbss.* .rela.gnu.linkonce.lb.*}) }
+  .rel.lrodata  ${RELOCATING-0} : { *(.rel.lrodata${RELOCATING+
.rel.lrodata.* .rel.gnu.linkonce.lr.*}) }
+  .rela.lrodata ${RELOCATING-0} : { *(.rela.lrodata${RELOCATING+
.rela.lrodata.* .rela.gnu.linkonce.lr.*}) }"
+test "${LARGE_SECTIONS}" = "yes" && LARGE_BSS="
+  .lbss ${RELOCATING-0} :
+  {
+    *(.dynlbss)
+    *(.lbss${RELOCATING+ .lbss.* .gnu.linkonce.lb.*})
+    *(LARGE_COMMON)
+  }"
+test "${LARGE_SECTIONS}" = "yes" && LARGE_SECTIONS="
+  .lrodata ${RELOCATING-0} ${RELOCATING+ALIGN(${MAXPAGESIZE}) + (. &
(${MAXPAGESIZE} - 1))} :
+  {
+    *(.lrodata${RELOCATING+ .lrodata.* .gnu.linkonce.lr.*})
+  }
+  .ldata ${RELOCATING-0} ${RELOCATING+ALIGN(${MAXPAGESIZE}) + (. &
(${MAXPAGESIZE} - 1))} :
+  {
+    *(.ldata${RELOCATING+ .ldata.* .gnu.linkonce.l.*})
+    ${RELOCATING+. = ALIGN(. != 0 ? ${ALIGNMENT} : 1);}
+  }"
+if test "${ENABLE_INITFINI_ARRAY}" = "yes"; then
+  SORT_INIT_ARRAY="KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*)
SORT_BY_INIT_PRIORITY(.ctors.*)))"
+  SORT_FINI_ARRAY="KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*)
SORT_BY_INIT_PRIORITY(.dtors.*)))"
+  CTORS_IN_INIT_ARRAY="EXCLUDE_FILE (*crtbegin.o *crtbegin?.o
*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors"
+  DTORS_IN_FINI_ARRAY="EXCLUDE_FILE (*crtbegin.o *crtbegin?.o
*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors"
+else
+  SORT_INIT_ARRAY="KEEP (*(SORT(.init_array.*)))"
+  SORT_FINI_ARRAY="KEEP (*(SORT(.fini_array.*)))"
+  CTORS_IN_INIT_ARRAY=
+  DTORS_IN_FINI_ARRAY=
+fi
+INIT_ARRAY=".init_array   ${RELOCATING-0} :
+  {
+    ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN
(${USER_LABEL_PREFIX}__init_array_start = .);}}
+    ${SORT_INIT_ARRAY}
+    KEEP (*(.init_array ${CTORS_IN_INIT_ARRAY}))
+    ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN
(${USER_LABEL_PREFIX}__init_array_end = .);}}
+  }"
+FINI_ARRAY=".fini_array   ${RELOCATING-0} :
+  {
+    ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN
(${USER_LABEL_PREFIX}__fini_array_start = .);}}
+    ${SORT_FINI_ARRAY}
+    KEEP (*(.fini_array ${DTORS_IN_FINI_ARRAY}))
+    ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN
(${USER_LABEL_PREFIX}__fini_array_end = .);}}
+  }"
+CTOR=".ctors        ${CONSTRUCTING-0} :
+  {
+    ${CONSTRUCTING+${CTOR_START}}
+    /* gcc uses crtbegin.o to find the start of
+       the constructors, so we make sure it is
+       first.  Because this is a wildcard, it
+       doesn't matter if the user does not
+       actually link against crtbegin.o; the
+       linker won't look for a file to match a
+       wildcard.  The wildcard also means that it
+       doesn't matter which directory crtbegin.o
+       is in.  */
+
+    KEEP (*crtbegin.o(.ctors))
+    KEEP (*crtbegin?.o(.ctors))
+
+    /* We don't want to include the .ctor section from
+       the crtend.o file until after the sorted ctors.
+       The .ctor section from the crtend file contains the
+       end of ctors marker and it must be last */
+
+    KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors))
+    KEEP (*(SORT(.ctors.*)))
+    KEEP (*(.ctors))
+    ${CONSTRUCTING+${CTOR_END}}
+  }"
+DTOR=".dtors        ${CONSTRUCTING-0} :
+  {
+    ${CONSTRUCTING+${DTOR_START}}
+    KEEP (*crtbegin.o(.dtors))
+    KEEP (*crtbegin?.o(.dtors))
+    KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors))
+    KEEP (*(SORT(.dtors.*)))
+    KEEP (*(.dtors))
+    ${CONSTRUCTING+${DTOR_END}}
+  }"
+STACK="  .stack        ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} :
+  {
+    ${RELOCATING+${USER_LABEL_PREFIX}_stack = .;}
+    *(.stack)
+  }"
+
+TEXT_START_ADDR="SEGMENT_START(\"text-segment\", ${TEXT_START_ADDR})"
+SHLIB_TEXT_START_ADDR="SEGMENT_START(\"text-segment\",
${SHLIB_TEXT_START_ADDR:-0})"
+
+if [ -z "$SEPARATE_CODE" ]; then
+  SIZEOF_HEADERS_CODE=" + SIZEOF_HEADERS"
+else
+  SIZEOF_HEADERS_CODE=
+fi
+
+# if this is for an embedded system, don't add SIZEOF_HEADERS.
+if [ -z "$EMBEDDED" ]; then
+   test -z "${TEXT_BASE_ADDRESS}" &&
TEXT_BASE_ADDRESS="${TEXT_START_ADDR}${SIZEOF_HEADERS_CODE}"
+    NDS32_INIT=""
+else
+   test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}"
+   NDS32_INIT=".nds32_init     : { KEEP(*(.nds32_init)) }"
+fi
+
+cat <<EOF
+OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
+	      "${LITTLE_OUTPUT_FORMAT}")
+OUTPUT_ARCH(${OUTPUT_ARCH})
+${RELOCATING+ENTRY(${ENTRY})}
+
+${RELOCATING+${LIB_SEARCH_DIRS}}
+${RELOCATING+${EXECUTABLE_SYMBOLS}}
+${RELOCATING+${INPUT_FILES}}
+${RELOCATING- /* For some reason, the Solaris linker makes bad executables
+  if gld -r is used and the intermediate file has sections starting
+  at non-zero addresses.  Could be a Solaris ld bug, could be a GNU ld
+  bug.  But for now assigning the zero vmas works.  */}
+
+SECTIONS
+{
+  /* Read-only sections, merged into text segment: */
+  ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+PROVIDE
(__executable_start = ${TEXT_START_ADDR}); . =
${TEXT_BASE_ADDRESS};}}}
+  ${CREATE_SHLIB+${RELOCATING+. =
${SHLIB_TEXT_START_ADDR}${SIZEOF_HEADERS_CODE};}}
+  ${CREATE_PIE+${RELOCATING+PROVIDE (__executable_start =
${SHLIB_TEXT_START_ADDR}); . =
${SHLIB_TEXT_START_ADDR}${SIZEOF_HEADERS_CODE};}}
+EOF
+
+emit_early_ro()
+{
+  cat <<EOF
+  ${INITIAL_READONLY_SECTIONS}
+  .note.gnu.build-id : { *(.note.gnu.build-id) }
+EOF
+}
+
+test -n "${SEPARATE_CODE}" || emit_early_ro
+
+test -n "${RELOCATING+0}" || unset NON_ALLOC_DYN
+test -z "${NON_ALLOC_DYN}" || TEXT_DYNAMIC=
+cat > ldscripts/dyntmp.$$ <<EOF
+  ${TEXT_DYNAMIC+${DYNAMIC}}
+  .hash         ${RELOCATING-0} : { *(.hash) }
+  .gnu.hash     ${RELOCATING-0} : { *(.gnu.hash) }
+  .dynsym       ${RELOCATING-0} : { *(.dynsym) }
+  .dynstr       ${RELOCATING-0} : { *(.dynstr) }
+  .gnu.version  ${RELOCATING-0} : { *(.gnu.version) }
+  .gnu.version_d ${RELOCATING-0}: { *(.gnu.version_d) }
+  .gnu.version_r ${RELOCATING-0}: { *(.gnu.version_r) }
+EOF
+
+if [ "x$COMBRELOC" = x ]; then
+  COMBRELOCCAT="cat >> ldscripts/dyntmp.$$"
+else
+  COMBRELOCCAT="cat > $COMBRELOC"
+fi
+eval $COMBRELOCCAT <<EOF
+  ${INITIAL_RELOC_SECTIONS}
+  .rel.init     ${RELOCATING-0} : { *(.rel.init) }
+  .rela.init    ${RELOCATING-0} : { *(.rela.init) }
+  .rel.text     ${RELOCATING-0} : { *(.rel.text${RELOCATING+
.rel.text.* .rel.gnu.linkonce.t.*}) }
+  .rela.text    ${RELOCATING-0} : { *(.rela.text${RELOCATING+
.rela.text.* .rela.gnu.linkonce.t.*}) }
+  .rel.fini     ${RELOCATING-0} : { *(.rel.fini) }
+  .rela.fini    ${RELOCATING-0} : { *(.rela.fini) }
+  .rel.${RODATA_NAME}   ${RELOCATING-0} : {
*(.rel.${RODATA_NAME}${RELOCATING+ .rel.${RODATA_NAME}.*
.rel.gnu.linkonce.r.*}) }
+  .rela.${RODATA_NAME}  ${RELOCATING-0} : {
*(.rela.${RODATA_NAME}${RELOCATING+ .rela.${RODATA_NAME}.*
.rela.gnu.linkonce.r.*}) }
+  ${OTHER_READONLY_RELOC_SECTIONS}
+  .rel.data.rel.ro ${RELOCATING-0} : {
*(.rel.data.rel.ro${RELOCATING+ .rel.data.rel.ro.*
.rel.gnu.linkonce.d.rel.ro.*}) }
+  .rela.data.rel.ro ${RELOCATING-0} : {
*(.rela.data.rel.ro${RELOCATING+ .rela.data.rel.ro.*
.rela.gnu.linkonce.d.rel.ro.*}) }
+  .rel.data     ${RELOCATING-0} : { *(.rel.data${RELOCATING+
.rel.data.* .rel.gnu.linkonce.d.*}) }
+  .rela.data    ${RELOCATING-0} : { *(.rela.data${RELOCATING+
.rela.data.* .rela.gnu.linkonce.d.*}) }
+  ${OTHER_READWRITE_RELOC_SECTIONS}
+  .rel.tdata	${RELOCATING-0} : { *(.rel.tdata${RELOCATING+
.rel.tdata.* .rel.gnu.linkonce.td.*}) }
+  .rela.tdata	${RELOCATING-0} : { *(.rela.tdata${RELOCATING+
.rela.tdata.* .rela.gnu.linkonce.td.*}) }
+  .rel.tbss	${RELOCATING-0} : { *(.rel.tbss${RELOCATING+ .rel.tbss.*
.rel.gnu.linkonce.tb.*}) }
+  .rela.tbss	${RELOCATING-0} : { *(.rela.tbss${RELOCATING+
.rela.tbss.* .rela.gnu.linkonce.tb.*}) }
+  .rel.ctors    ${RELOCATING-0} : { *(.rel.ctors) }
+  .rela.ctors   ${RELOCATING-0} : { *(.rela.ctors) }
+  .rel.dtors    ${RELOCATING-0} : { *(.rel.dtors) }
+  .rela.dtors   ${RELOCATING-0} : { *(.rela.dtors) }
+  .rel.got      ${RELOCATING-0} : { *(.rel.got) }
+  .rela.got     ${RELOCATING-0} : { *(.rela.got) }
+  ${OTHER_GOT_RELOC_SECTIONS}
+  ${REL_SDATA}
+  ${REL_SBSS}
+  ${REL_SDATA2}
+  ${REL_SBSS2}
+  .rel.${BSS_NAME}      ${RELOCATING-0} : {
*(.rel.${BSS_NAME}${RELOCATING+ .rel.${BSS_NAME}.*
.rel.gnu.linkonce.b.*}) }
+  .rela.${BSS_NAME}     ${RELOCATING-0} : {
*(.rela.${BSS_NAME}${RELOCATING+ .rela.${BSS_NAME}.*
.rela.gnu.linkonce.b.*}) }
+  ${REL_LARGE}
+  ${IREL_IN_PLT+$REL_IFUNC}
+  ${IREL_IN_PLT+$RELA_IFUNC}
+  ${IREL_IN_PLT-$REL_IPLT}
+  ${IREL_IN_PLT-$RELA_IPLT}
+EOF
+
+if [ -n "$COMBRELOC" ]; then
+cat >> ldscripts/dyntmp.$$ <<EOF
+  .rel.dyn      ${RELOCATING-0} :
+    {
+EOF
+sed -e '/^[ 	]*[{}][ 	]*$/d;/:[ 	]*$/d;/\.rela\./d;s/^.*: {
*\(.*\)}$/      \1/' $COMBRELOC >> ldscripts/dyntmp.$$
+cat >> ldscripts/dyntmp.$$ <<EOF
+    }
+  .rela.dyn     ${RELOCATING-0} :
+    {
+EOF
+sed -e '/^[ 	]*[{}][ 	]*$/d;/:[ 	]*$/d;/\.rel\./d;s/^.*: { *\(.*\)}/
    \1/' $COMBRELOC >> ldscripts/dyntmp.$$
+cat >> ldscripts/dyntmp.$$ <<EOF
+    }
+EOF
+fi
+
+cat >> ldscripts/dyntmp.$$ <<EOF
+  .rel.plt      ${RELOCATING-0} :
+    {
+      *(.rel.plt)
+      ${IREL_IN_PLT+${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN
(${USER_LABEL_PREFIX}__rel_iplt_start = .);}}}
+      ${IREL_IN_PLT+${RELOCATING+*(.rel.iplt)}}
+      ${IREL_IN_PLT+${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN
(${USER_LABEL_PREFIX}__rel_iplt_end = .);}}}
+    }
+  .rela.plt     ${RELOCATING-0} :
+    {
+      *(.rela.plt)
+      ${IREL_IN_PLT+${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN
(${USER_LABEL_PREFIX}__rela_iplt_start = .);}}}
+      ${IREL_IN_PLT+${RELOCATING+*(.rela.iplt)}}
+      ${IREL_IN_PLT+${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN
(${USER_LABEL_PREFIX}__rela_iplt_end = .);}}}
+    }
+  ${OTHER_PLT_RELOC_SECTIONS}
+EOF
+
+emit_dyn()
+{
+  if test -z "${NO_REL_RELOCS}${NO_RELA_RELOCS}"; then
+    cat ldscripts/dyntmp.$$
+  else
+    if test -z "${NO_REL_RELOCS}"; then
+      sed -e '/^[ 	]*\.rela\.[^}]*$/,/}/d' -e '/^[ 	]*\.rela\./d'
ldscripts/dyntmp.$$
+    fi
+    if test -z "${NO_RELA_RELOCS}"; then
+      sed -e '/^[ 	]*\.rel\.[^}]*$/,/}/d' -e '/^[ 	]*\.rel\./d'
ldscripts/dyntmp.$$
+    fi
+  fi
+  rm -f ldscripts/dyntmp.$$
+}
+
+test -n "${NON_ALLOC_DYN}${SEPARATE_CODE}" || emit_dyn
+
+cat <<EOF
+  .init         ${RELOCATING-0} :
+  {
+    ${RELOCATING+${INIT_START}}
+    KEEP (*(SORT_NONE(.init)))
+    ${RELOCATING+${INIT_END}}
+  } ${FILL}
+
+  ${TEXT_PLT+${PLT_NEXT_DATA-${PLT}}}
+  ${TINY_READONLY_SECTION}
+  .text         ${RELOCATING-0} :
+  {
+    ${RELOCATING+${TEXT_START_SYMBOLS}}
+    ${RELOCATING+*(.text.unlikely .text.*_unlikely)}
+    ${RELOCATING+*(.text.exit .text.exit.*)}
+    ${RELOCATING+*(.text.startup .text.startup.*)}
+    ${RELOCATING+*(.text.hot .text.hot.*)}
+    *(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*})
+    /* .gnu.warning sections are handled specially by elf32.em.  */
+    *(.gnu.warning)
+    ${RELOCATING+${OTHER_TEXT_SECTIONS}}
+  } ${FILL}
+  .fini         ${RELOCATING-0} :
+  {
+    ${RELOCATING+${FINI_START}}
+    KEEP (*(SORT_NONE(.fini)))
+    ${RELOCATING+${FINI_END}}
+  } ${FILL}
+  ${RELOCATING+PROVIDE (__${ETEXT_NAME} = .);}
+  ${RELOCATING+PROVIDE (_${ETEXT_NAME} = .);}
+  ${RELOCATING+PROVIDE (${ETEXT_NAME} = .);}
+EOF
+
+if test -n "${SEPARATE_CODE}"; then
+  if test -n "${RODATA_ADDR}"; then
+    RODATA_ADDR="\
+SEGMENT_START(\"rodata-segment\", ${RODATA_ADDR}) + SIZEOF_HEADERS"
+  else
+    RODATA_ADDR="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
+    RODATA_ADDR="SEGMENT_START(\"rodata-segment\", ${RODATA_ADDR})"
+  fi
+  if test -n "${SHLIB_RODATA_ADDR}"; then
+    SHLIB_RODATA_ADDR="\
+SEGMENT_START(\"rodata-segment\", ${SHLIB_RODATA_ADDR}) + SIZEOF_HEADERS"
+  else
+    SHLIB_RODATA_ADDR="SEGMENT_START(\"rodata-segment\", ${SHLIB_RODATA_ADDR})"
+    SHLIB_RODATA_ADDR="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
+  fi
+  cat <<EOF
+  /* Adjust the address for the rodata segment.  We want to adjust up to
+     the same address within the page on the next page up.  */
+  ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${RODATA_ADDR};}}}
+  ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_RODATA_ADDR};}}
+  ${CREATE_PIE+${RELOCATING+. = ${SHLIB_RODATA_ADDR};}}
+EOF
+  emit_early_ro
+  emit_dyn
+fi
+
+cat <<EOF
+  ${WRITABLE_RODATA-${RODATA}}
+  .${RODATA_NAME}1      ${RELOCATING-0} : { *(.${RODATA_NAME}1) }
+  ${CREATE_SHLIB-${SDATA2}}
+  ${CREATE_SHLIB-${SBSS2}}
+  ${OTHER_READONLY_SECTIONS}
+  .eh_frame_hdr : { *(.eh_frame_hdr) }
+  .eh_frame     ${RELOCATING-0} : ONLY_IF_RO { KEEP (*(.eh_frame)) }
+  .gcc_except_table ${RELOCATING-0} : ONLY_IF_RO { *(.gcc_except_table
+  .gcc_except_table.*) }
+  /* These sections are generated by the Sun/Oracle C++ compiler.  */
+  .exception_ranges ${RELOCATING-0} : ONLY_IF_RO { *(.exception_ranges
+  .exception_ranges*) }
+  ${TEXT_PLT+${PLT_NEXT_DATA+${PLT}}}
+
+  /* Adjust the address for the data segment.  We want to adjust up to
+     the same address within the page on the next page up.  */
+  ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. =
${DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}}
+  ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
+  ${CREATE_PIE+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
+
+  /* Exception handling  */
+  .eh_frame     ${RELOCATING-0} : ONLY_IF_RW { KEEP (*(.eh_frame)) }
+  .gcc_except_table ${RELOCATING-0} : ONLY_IF_RW {
*(.gcc_except_table .gcc_except_table.*) }
+  .exception_ranges ${RELOCATING-0} : ONLY_IF_RW {
*(.exception_ranges .exception_ranges*) }
+
+  /* Thread Local Storage sections  */
+  .tdata	${RELOCATING-0} : { *(.tdata${RELOCATING+ .tdata.*
.gnu.linkonce.td.*}) }
+  .tbss		${RELOCATING-0} : { *(.tbss${RELOCATING+ .tbss.*
.gnu.linkonce.tb.*})${RELOCATING+ *(.tcommon)} }
+
+  .preinit_array   ${RELOCATING-0} :
+  {
+    ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN
(${USER_LABEL_PREFIX}__preinit_array_start = .);}}
+    KEEP (*(.preinit_array))
+    ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN
(${USER_LABEL_PREFIX}__preinit_array_end = .);}}
+  }
+  ${RELOCATING+${INIT_ARRAY}}
+  ${RELOCATING+${FINI_ARRAY}}
+  ${SMALL_DATA_CTOR-${RELOCATING+${CTOR}}}
+  ${SMALL_DATA_DTOR-${RELOCATING+${DTOR}}}
+  .jcr          ${RELOCATING-0} : { KEEP (*(.jcr)) }
+
+  ${RELOCATING+${DATARELRO}}
+  ${OTHER_RELRO_SECTIONS}
+  ${TEXT_DYNAMIC-${DYNAMIC}}
+  ${DATA_GOT+${RELRO_NOW+${GOT}}}
+  ${DATA_GOT+${RELRO_NOW+${GOTPLT}}}
+  ${DATA_GOT+${RELRO_NOW-${SEPARATE_GOTPLT+${GOT}}}}
+  ${RELOCATING+${DATA_SEGMENT_RELRO_END}}
+  ${INITIAL_READWRITE_SECTIONS}
+  ${DATA_GOT+${RELRO_NOW-${SEPARATE_GOTPLT-${GOT}}}}
+  ${DATA_GOT+${RELRO_NOW-${GOTPLT}}}
+
+  ${DATA_PLT+${PLT_BEFORE_GOT-${PLT}}}
+
+  .data         ${RELOCATING-0} :
+  {
+    ${RELOCATING+${DATA_START_SYMBOLS}}
+    *(.data${RELOCATING+ .data.* .gnu.linkonce.d.*})
+    ${CONSTRUCTING+SORT(CONSTRUCTORS)}
+  }
+  .data1        ${RELOCATING-0} : { *(.data1) }
+  ${WRITABLE_RODATA+${RODATA}}
+  ${OTHER_READWRITE_SECTIONS}
+  ${SMALL_DATA_CTOR+${RELOCATING+${CTOR}}}
+  ${SMALL_DATA_DTOR+${RELOCATING+${DTOR}}}
+  ${RELOCATING+. = ALIGN(4);}
+  ${DATA_PLT+${PLT_BEFORE_GOT+${PLT}}}
+  ${SDATA_GOT+${RELOCATING+${OTHER_GOT_SYMBOLS+. = .; ${OTHER_GOT_SYMBOLS}}}}
+  ${SDATA_GOT+${GOT}}
+  ${SDATA_GOT+${OTHER_GOT_SECTIONS}}
+  ${SDATA}
+  ${OTHER_SDATA_SECTIONS}
+  ${RELOCATING+${DATA_END_SYMBOLS-${USER_LABEL_PREFIX}_edata = .;
PROVIDE (${USER_LABEL_PREFIX}edata = .);}}
+  ${RELOCATING+. = .;}
+  ${RELOCATING+${USER_LABEL_PREFIX}__bss_start = .;}
+  ${RELOCATING+${OTHER_BSS_SYMBOLS}}
+  ${SBSS}
+  ${BSS_PLT+${PLT}}
+  .${BSS_NAME}          ${RELOCATING-0} :
+  {
+   *(.dyn${BSS_NAME})
+   *(.${BSS_NAME}${RELOCATING+ .${BSS_NAME}.* .gnu.linkonce.b.*})
+   *(COMMON)
+   /* Align here to ensure that the .bss section occupies space up to
+      _end.  Align after .bss to ensure correct alignment even if the
+      .bss section disappears because there are no input sections.
+      FIXME: Why do we need it? When there is no .bss section, we don't
+      pad the .data section.  */
+   ${RELOCATING+. = ALIGN(. != 0 ? ${ALIGNMENT} : 1);}
+  }
+  ${OTHER_BSS_SECTIONS}
+  ${LARGE_BSS_AFTER_BSS+${LARGE_BSS}}
+  ${RELOCATING+_end = .;}
+  ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
+  ${RELOCATING+. = ALIGN(${ALIGNMENT});}
+EOF
+
+LARGE_DATA_ADDR=". = SEGMENT_START(\"ldata-segment\", ${LARGE_DATA_ADDR-.});"
+SHLIB_LARGE_DATA_ADDR=". = SEGMENT_START(\"ldata-segment\",
${SHLIB_LARGE_DATA_ADDR-.});"
+
+  cat <<EOF
+  ${RELOCATING+${CREATE_SHLIB-${CREATE_PIE-${LARGE_DATA_ADDR}}}}
+  ${RELOCATING+${CREATE_SHLIB+${SHLIB_LARGE_DATA_ADDR}}}
+  ${RELOCATING+${CREATE_PIE+${SHLIB_LARGE_DATA_ADDR}}}
+  ${LARGE_SECTIONS}
+  ${LARGE_BSS_AFTER_BSS-${LARGE_BSS}}
+  ${RELOCATING+. = ALIGN(${ALIGNMENT});}
+  ${RELOCATING+${OTHER_END_SYMBOLS}}
+  ${RELOCATING+${END_SYMBOLS-${USER_LABEL_PREFIX}_end = .; PROVIDE
(${USER_LABEL_PREFIX}end = .);}}
+  ${RELOCATING+${DATA_SEGMENT_END}}
+EOF
+
+test -z "${NON_ALLOC_DYN}" || emit_dyn
+
+cat <<EOF
+  /* Stabs debugging sections.  */
+  .stab          0 : { *(.stab) }
+  .stabstr       0 : { *(.stabstr) }
+  .stab.excl     0 : { *(.stab.excl) }
+  .stab.exclstr  0 : { *(.stab.exclstr) }
+  .stab.index    0 : { *(.stab.index) }
+  .stab.indexstr 0 : { *(.stab.indexstr) }
+
+  .comment       0 : { *(.comment) }
+
+EOF
+
+. $srcdir/scripttempl/DWARF.sc
+
+cat <<EOF
+
+  ${TINY_DATA_SECTION}
+  ${TINY_BSS_SECTION}
+
+  ${STACK_ADDR+${STACK}}
+  ${ATTRS_SECTIONS}
+  ${OTHER_SECTIONS}
+  ${RELOCATING+${OTHER_SYMBOLS}}
+  ${RELOCATING+${DISCARDED}}
+}
+EOF



-- 
Best regards,
Kuan-Lin Chen.
kuanlinchentw@gmail.com



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