PATCH for enabling IRIX6 ld

[Mark Mitchell <mark@codesourcery.com>]

This patch is the final bit of the N32 ld work completed thus far.  It
enables ld on IRIX6, and adds an N32 emulation.  

OK to check in?

--
Mark Mitchell                   mark@codesourcery.com
CodeSourcery, LLC               http://www.codesourcery.com

1999-06-30  Mark Mitchell  <mark@codesourcery.com>

	* configure.in: Build ld on IRIX6.

1999-06-30  Mark Mitchell  <mark@codesourcery.com>

	* Makefile.am (ALL_EMULATIONS): Add eelf32bmipn32.o.
	(eelf32bmipn32.c): New target.
	* Makefile.in: Regenerated.
	* configure.tgt (mips-sgi-irix6*): Make n32 to the default
	emulation.
	* emulparams/elf32bmipn32.sh: New file.
	
Index: configure.in
===================================================================
RCS file: /cvs/binutils/binutils/configure.in,v
retrieving revision 1.1.1.1
diff -u -p -r1.1.1.1 configure.in
--- configure.in	1999/05/03 07:28:40	1.1.1.1
+++ configure.in	1999/07/01 03:32:52
@@ -784,9 +784,9 @@ case "${target}" in
     noconfigdirs="$noconfigdirs ld gprof emacs target-libgloss"
     ;;
   mips*-*-irix6*)
-    # The GNU assembler and linker do not support IRIX 6.
+    # The GNU assembler does not support IRIX 6.
     # emacs is emacs 18, which does not work on Irix 5 (emacs19 does work)
-    noconfigdirs="$noconfigdirs ld gas gprof emacs target-libgloss"
+    noconfigdirs="$noconfigdirs gas gprof emacs target-libgloss"
     ;;
   mips*-dec-bsd*)
     noconfigdirs="$noconfigdirs gprof target-libgloss"
Index: ld/Makefile.am
===================================================================
RCS file: /cvs/binutils/binutils/ld/Makefile.am,v
retrieving revision 1.7
diff -u -p -r1.7 Makefile.am
--- Makefile.am	1999/06/18 15:25:40	1.7
+++ Makefile.am	1999/07/01 03:15:28
@@ -122,6 +122,7 @@ ALL_EMULATIONS = \
 	eelf32bmip.o \
 	eelf32ebmip.o \
 	eelf32elmip.o \
+	eelf32bmipn32.o \
 	eelf32l4300.o \
 	eelf32lmip.o \
 	eelf32lppc.o \
@@ -354,6 +356,9 @@ eelf32ebmip.c: $(srcdir)/emulparams/elf3
 eelf32elmip.c: $(srcdir)/emulparams/elf32elmip.sh \
   $(srcdir)/emultempl/elf32.em $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
 	${GENSCRIPTS} elf32elmip "$(tdir_elf32elmip)"
+eelf32bmipn32.c: $(srcdir)/emulparams/elf32bmipn32.sh \
+  $(srcdir)/emultempl/elf32.em $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
+	${GENSCRIPTS} elf32bmipn32 "$(tdir_elf32bmipn32)"
 eelf32l4300.c: $(srcdir)/emulparams/elf32l4300.sh \
   $(srcdir)/emultempl/elf32.em $(srcdir)/scripttempl/elf.sc ${GEN_DEPENDS}
 	${GENSCRIPTS} elf32l4300 "$(tdir_elf32l4300)"
Index: ld/configure.tgt
===================================================================
RCS file: /cvs/binutils/binutils/ld/configure.tgt,v
retrieving revision 1.8
diff -u -p -r1.8 configure.tgt
--- configure.tgt	1999/06/18 15:25:44	1.8
+++ configure.tgt	1999/07/01 03:15:33
@@ -176,7 +176,10 @@ hppa*-*-rtems*)		targ_emul=hppaelf ;;
 vax-dec-ultrix* | vax-dec-bsd*) targ_emul=vax ;;
 mips*-dec-ultrix*)	targ_emul=mipslit ;;
 mips*-dec-osf*)		targ_emul=mipslit ;;
-mips*-sgi-irix[56]*)	targ_emul=elf32bsmip ;;
+mips*-sgi-irix5*)	targ_emul=elf32bsmip ;;
+mips*-sgi-irix6*)	targ_emul=elf32bmipn32
+	                targ_extra_emuls="elf32bsmip"
+	                ;;
 mips*-sgi-irix*)	targ_emul=mipsbig ;;
 mips*el-*-ecoff*)	targ_emul=mipsidtl ;;
 mips*-*-ecoff*)		targ_emul=mipsidt ;;
Index: ld/emulparams/elf32bmipn32.sh
===================================================================
RCS file: elf32bmipn32.sh
diff -N elf32bmipn32.sh
--- /dev/null	Sat Dec  5 20:30:03 1998
+++ elf32bmipn32.sh	Wed Jun 30 20:38:01 1999
@@ -0,0 +1,43 @@
+# This is an ELF platform.
+SCRIPT_NAME=elf
+
+# Handle both big- and little-ended 32-bit MIPS objects.
+ARCH=mips
+OUTPUT_FORMAT="elf32-bigmips"
+BIG_OUTPUT_FORMAT="elf32-bigmips"
+LITTLE_OUTPUT_FORMAT="elf32-littlemips"
+
+TEMPLATE_NAME=elf32
+
+TEXT_START_ADDR=0x10000000
+MAXPAGESIZE=0x100000
+ENTRY=__start
+
+# GOT-related settings.  
+OTHER_GOT_SYMBOLS='
+  _gp = ALIGN(16) + 0x7ff0;
+'
+OTHER_GOT_SECTIONS='
+  .lit8 : { *(.lit8) }
+  .lit4 : { *(.lit4) }
+  .srdata : { *(.srdata) }
+'
+
+# Magic symbols.
+TEXT_START_SYMBOLS='_ftext = . ;'
+DATA_START_SYMBOLS='_fdata = . ;'
+OTHER_BSS_SYMBOLS='_fbss = .;'
+# IRIX6 defines these symbols.  0x34 is the size of the ELF header.
+EXECUTABLE_SYMBOLS="
+  __dso_displacement = 0;
+  __elf_header = ${TEXT_START_ADDR};
+  __program_header_table = ${TEXT_START_ADDR} + 0x34;
+"
+
+# There are often dynamic relocations against the .rodata section.
+# Setting DT_TEXTREL in the .dynamic section does not convince the
+# IRIX6 linker to permit relocations against the text segment.
+# Following the IRIX linker, we simply put .rodata in the data
+# segment.
+WRITABLE_RODATA=
+