New port: National Semiconductor's CR16

8 files changed, 302 insertions, 4 deletions

diff --git a/ld/ChangeLog b/ld/ChangeLog
index 617a55e..d10cd17 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,15 @@
+2006-06-29  M R Swami Reddy  <MR.Swami.Reddy@nsc.com>
+
+	* scripttemp/elf32cr16.sc: Default linker script.
+	* emulparams/elf32cr16.sh: Emulation script.
+	* emultempl/cr16elf.em: Emulation script.
+	* Makefile.am: Add entry to make cr16 target.
+	* Makefile.in: Regenerate.
+	* configure.tgt: Specify default and other emulation parameters
+	for cr16.
+	* ChangeLog: Added CR16 target entry.
+	* NEWS: Announce the support for the CR16 new target.
+
 2007-06-27  Alan Modra  <amodra@bigpond.net.au>
 
 	* pe-dll.c: Rename uses of bfd.next to bfd.archive_next throughout.
diff --git a/ld/Makefile.am b/ld/Makefile.am
index c30bd28..72dd649 100644
--- a/ld/Makefile.am
+++ b/ld/Makefile.am
@@ -157,6 +157,7 @@ ALL_EMULATIONS = \
 	eelf32b4300.o \
 	eelf32bfin.o \
 	eelf32bfinfd.o \
+	eelf32cr16.o \
 	eelf32cr16c.o \
 	eelf32bmip.o \
 	eelf32bmipn32.o \
@@ -746,6 +747,10 @@ eelf32b4300.c: $(srcdir)/emulparams/elf32b4300.sh \
   $(srcdir)/emulparams/elf32bmip.sh $(ELF_DEPS) \
   $(srcdir)/emultempl/mipself.em $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
 	${GENSCRIPTS} elf32b4300 "$(tdir_elf32b4300)"
+eelf32cr16.c: $(srcdir)/emulparams/elf32cr16.sh \
+  $(srcdir)/emultempl/elf32.em $(srcdir)/emultempl/cr16elf.em \
+  $(srcdir)/scripttempl/elf32cr16.sc ${GEN_DEPENDS} 
+	${GENSCRIPTS} elf32cr16 "$(tdir_elf32crx)"
 eelf32cr16c.c: $(srcdir)/emulparams/elf32cr16c.sh \
   $(ELF_DEPS) \
   $(srcdir)/scripttempl/elf32cr16c.sc ${GEN_DEPENDS}
diff --git a/ld/Makefile.in b/ld/Makefile.in
index 05fa46b..69b60c1 100644
--- a/ld/Makefile.in
+++ b/ld/Makefile.in
@@ -404,6 +404,7 @@ ALL_EMULATIONS = \
 	eelf32b4300.o \
 	eelf32bfin.o \
 	eelf32bfinfd.o \
+	eelf32cr16.o \
 	eelf32cr16c.o \
 	eelf32bmip.o \
 	eelf32bmipn32.o \
@@ -734,15 +735,15 @@ $(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__confi
 	@for dep in $?; do \
 	  case '$(am__configure_deps)' in \
 	    *$$dep*) \
-	      echo ' cd $(srcdir) && $(AUTOMAKE) --cygnus '; \
-	      cd $(srcdir) && $(AUTOMAKE) --cygnus  \
+	      echo ' cd $(srcdir) && $(AUTOMAKE) --foreign '; \
+	      cd $(srcdir) && $(AUTOMAKE) --foreign  \
 		&& exit 0; \
 	      exit 1;; \
 	  esac; \
 	done; \
-	echo ' cd $(top_srcdir) && $(AUTOMAKE) --cygnus  Makefile'; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --foreign  Makefile'; \
 	cd $(top_srcdir) && \
-	  $(AUTOMAKE) --cygnus  Makefile
+	  $(AUTOMAKE) --foreign  Makefile
 .PRECIOUS: Makefile
 Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
 	@case '$?' in \
@@ -1572,6 +1573,10 @@ eelf32b4300.c: $(srcdir)/emulparams/elf32b4300.sh \
   $(srcdir)/emulparams/elf32bmip.sh $(ELF_DEPS) \
   $(srcdir)/emultempl/mipself.em $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
 	${GENSCRIPTS} elf32b4300 "$(tdir_elf32b4300)"
+eelf32cr16.c: $(srcdir)/emulparams/elf32cr16.sh \
+  $(srcdir)/emultempl/elf32.em $(srcdir)/emultempl/cr16elf.em \
+  $(srcdir)/scripttempl/elf32cr16.sc ${GEN_DEPENDS} 
+	${GENSCRIPTS} elf32cr16 "$(tdir_elf32crx)"
 eelf32cr16c.c: $(srcdir)/emulparams/elf32cr16c.sh \
   $(ELF_DEPS) \
   $(srcdir)/scripttempl/elf32cr16c.sc ${GEN_DEPENDS}
diff --git a/ld/NEWS b/ld/NEWS
index cbce99c..010bde7 100644
--- a/ld/NEWS
+++ b/ld/NEWS
@@ -1,4 +1,6 @@
 -*- text -*-
+* Added support for National Semicondutor CompactRISC (ie CR16) target.
+*
 * -l:foo now searches the library path for a filename called foo,
   without converting it to libfoo.a or libfoo.so.
 
diff --git a/ld/configure.tgt b/ld/configure.tgt
index 80383cf..46e05d3 100644
--- a/ld/configure.tgt
+++ b/ld/configure.tgt
@@ -121,6 +121,7 @@ bfin-*-linux-uclibc*)	targ_emul=elf32bfin;
 			targ_extra_emuls="elf32bfinfd"
 			targ_extra_libpath=$targ_extra_emuls
 			;;
+cr16-*-elf*)            targ_emul=elf32cr16 ;;
 cr16c-*-elf*)           targ_emul=elf32cr16c
 			;;
 cris-*-*aout*)		targ_emul=crisaout
diff --git a/ld/emulparams/elf32cr16.sh b/ld/emulparams/elf32cr16.sh
new file mode 100644
index 0000000..756d02b
--- /dev/null
+++ b/ld/emulparams/elf32cr16.sh
@@ -0,0 +1,6 @@
+SCRIPT_NAME=elf32cr16
+TEMPLATE_NAME=elf32
+OUTPUT_FORMAT="elf32-cr16"
+ARCH=cr16
+ENTRY=_start
+EXTRA_EM_FILE=cr16elf
diff --git a/ld/emultempl/cr16elf.em b/ld/emultempl/cr16elf.em
new file mode 100644
index 0000000..0881634
--- /dev/null
+++ b/ld/emultempl/cr16elf.em
@@ -0,0 +1,92 @@
+# This shell script emits a C file. -*- C -*-
+# Copyright 2007 Free Software Foundation, Inc.
+# Contributed by M R Swami Reddy <MR.Swami.Reddy@nsc.com>
+#
+# This file is part of GLD, the Gnu Linker.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
+#
+
+# This file is sourced from elf32.em, and defines extra cr16-elf
+# specific routines.
+#
+cat >>e${EMULATION_NAME}.c <<EOF
+
+#include "ldctor.h"
+
+/* Flag for the emulation-specific "--no-relax" option.  */
+static bfd_boolean disable_relaxation = FALSE;
+
+static void
+cr16elf_after_parse (void)
+{
+  /* Always behave as if called with --sort-common command line
+     option.
+     This is to emulate the CRTools' method of keeping variables
+     of different alignment in separate sections.  */
+  config.sort_common = TRUE;
+
+  /* Don't create a demand-paged executable, since this feature isn't
+     meaninful in CR16 embedded systems. Moreover, when magic_demand_paged
+     is true the link sometimes fails.  */
+  config.magic_demand_paged = FALSE;
+}
+
+/* This is called after the sections have been attached to output
+   sections, but before any sizes or addresses have been set.  */
+
+static void
+cr16elf_before_allocation (void)
+{
+  /* Call the default first.  */
+  gld${EMULATION_NAME}_before_allocation ();
+
+  /* Enable relaxation by default if the "--no-relax" option was not
+     specified.  This is done here instead of in the before_parse hook
+     because there is a check in main() to prohibit use of --relax and
+     -r together.  */
+
+  if (!disable_relaxation)
+    command_line.relax = TRUE;
+}
+
+EOF
+
+# Define some shell vars to insert bits of code into the standard elf
+# parse_args and list_options functions.
+#
+PARSE_AND_LIST_PROLOGUE='
+#define OPTION_NO_RELAX			301
+'
+
+PARSE_AND_LIST_LONGOPTS='
+  { "no-relax", no_argument, NULL, OPTION_NO_RELAX},
+'
+
+PARSE_AND_LIST_OPTIONS='
+  fprintf (file, _("  --no-relax                  Do not relax branches\n"));
+'
+
+PARSE_AND_LIST_ARGS_CASES='
+    case OPTION_NO_RELAX:
+      disable_relaxation = TRUE;
+      break;
+'
+
+# Put these extra cr16-elf routines in ld_${EMULATION_NAME}_emulation
+#
+LDEMUL_AFTER_PARSE=cr16elf_after_parse
+LDEMUL_BEFORE_ALLOCATION=cr16elf_before_allocation
+
diff --git a/ld/scripttempl/elf32cr16.sc b/ld/scripttempl/elf32cr16.sc
new file mode 100644
index 0000000..2e62fa2
--- /dev/null
+++ b/ld/scripttempl/elf32cr16.sc
@@ -0,0 +1,175 @@
+# Linker Script for National Semiconductor's CR16-ELF32.
+
+# The next line should be uncommented if it is desired to link
+# without libstart.o and directly enter main.
+
+# ENTRY=_main
+
+test -z "$ENTRY" && ENTRY=_start
+cat <<EOF
+
+/* Example Linker Script for linking NS CR16 elf32 files. */
+
+/* The next line forces the entry point (${ENTRY} in this script)
+   to be entered in the output file as an undefined symbol.
+   It is needed in case the entry point is not called explicitly
+   (which is the usual case) AND is in an archive.  */
+
+OUTPUT_FORMAT("${OUTPUT_FORMAT}")
+OUTPUT_ARCH(${ARCH})
+EXTERN(${ENTRY})
+ENTRY(${ENTRY})
+
+/* Define memory regions.  */
+MEMORY
+{
+        rom         : ORIGIN = 0x2,         LENGTH = 3M
+        ram         : ORIGIN = 4M,          LENGTH = 10M
+}
+
+/*  Many sections come in three flavours.  There is the 'real' section,
+    like ".data".  Then there are the per-procedure or per-variable
+    sections, generated by -ffunction-sections and -fdata-sections in GCC,
+    and useful for --gc-sections, which for a variable "foo" might be
+    ".data.foo".  Then there are the linkonce sections, for which the linker
+    eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
+    The exact correspondences are:
+
+    Section	Linkonce section
+    .text	.gnu.linkonce.t.foo
+    .rdata	.gnu.linkonce.r.foo
+    .data	.gnu.linkonce.d.foo
+    .bss	.gnu.linkonce.b.foo
+    .debug_info	.gnu.linkonce.wi.foo  */
+
+SECTIONS
+{
+  .init :
+  { 
+    __INIT_START = .; 
+    KEEP (*(.init))
+    __INIT_END = .; 
+  } > rom
+
+  .fini :
+  { 
+    __FINI_START = .; 
+    KEEP (*(.fini))
+    __FINI_END = .; 
+  } > rom
+
+  .jcr :
+  { 
+    KEEP (*(.jcr))
+  } > rom
+
+  .text : 
+  {
+    __TEXT_START = .;
+    *(.text) *(.text.*) *(.gnu.linkonce.t.*)
+    __TEXT_END = .;
+  } > rom
+
+  .rdata :
+  {
+    __RDATA_START = .;
+    *(.rdata_4) *(.rdata_2) *(.rdata_1) *(.rdata.*) *(.gnu.linkonce.r.*) *(.rodata*)
+    __RDATA_END = .;
+  } > rom
+
+  .ctor ALIGN(4) : 
+  { 
+    __CTOR_START = .; 
+    /* The compiler 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))
+
+    /* 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) .ctors))
+    KEEP (*(SORT(.ctors.*)))
+    KEEP (*(.ctors))
+    __CTOR_END = .; 
+  } > rom
+
+  .dtor ALIGN(4) : 
+  { 
+    __DTOR_START = .; 
+    KEEP (*crtbegin*.o(.dtors))
+    KEEP (*(EXCLUDE_FILE (*crtend*.o) .dtors))
+    KEEP (*(SORT(.dtors.*)))
+    KEEP (*(.dtors))
+    __DTOR_END = .; 
+  } > rom
+
+  .data :
+  {
+    __DATA_START = .;
+    *(.data_4) *(.data_2) *(.data_1) *(.data) *(.data.*) *(.gnu.linkonce.d.*)
+    __DATA_END = .;
+  } > ram AT > rom
+
+  .bss (NOLOAD) :
+  {
+    __BSS_START = .;
+    *(.bss_4) *(.bss_2) *(.bss_1) *(.bss) *(COMMON) *(.bss.*) *(.gnu.linkonce.b.*)
+    __BSS_END = .;
+  } > ram
+
+/* You may change the sizes of the following sections to fit the actual
+   size your program requires.
+
+   The heap and stack are aligned to the bus width, as a speed optimization
+   for accessing data located there.  */
+
+  .heap :
+  {
+    . = ALIGN(4);
+    __HEAP_START = .;
+    . += 0x2000; __HEAP_MAX = .;
+  } > ram
+
+  .stack :
+  {
+    . = ALIGN(4);
+    . += 0x6000;
+    __STACK_START = .;
+  } > ram
+
+  .istack :
+  {
+    . = ALIGN(4);
+    . += 0x100;
+    __ISTACK_START = .;
+  } > ram
+
+  .comment        0 : { *(.comment) }
+
+  /* DWARF debug sections.
+     Symbols in the DWARF debugging sections are relative to the beginning
+     of the section so we begin them at 0.  */
+
+  .debug_aranges  0 : { *(.debug_aranges) }
+  .debug_pubnames 0 : { *(.debug_pubnames) }
+  .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
+  .debug_abbrev   0 : { *(.debug_abbrev) }
+  .debug_line     0 : { *(.debug_line) }
+  .debug_frame    0 : { *(.debug_frame) }
+  .debug_str      0 : { *(.debug_str) }
+  .debug_loc      0 : { *(.debug_loc) }
+  .debug_macinfo  0 : { *(.debug_macinfo) }
+}
+
+__DATA_IMAGE_START = LOADADDR(.data);
+EOF