Bring some rough support for FreeBSD S/390 to the GNU toolchain.

This is no-op and only for reference: the S/390 port seems to be elusive
in the BSDs so it is convenient to keep some trace from past efforts.
It is likely newer attempts will focus on a newer toolchain using clang
instead.

Obtained from:	Perforce depot/projects/s390

contrib/binutils/bfd/config.bfd

@@ -1156,13 +1156,13 @@ case "${targ}" in
     targ_selvecs="bfd_powerpcle_pei_vec bfd_powerpc_pei_vec bfd_powerpcle_pe_vec bfd_powerpc_pe_vec"
     ;;
 
-  s390-*-linux*)
+  s390-*-freebsd* | s390-*-linux*)
     targ_defvec=bfd_elf32_s390_vec
     targ64_selvecs=bfd_elf64_s390_vec
     want64=true
     ;;
 #ifdef BFD64
-  s390x-*-linux*)
+  s390x-*-freebsd* | s390x-*-linux*)
     targ_defvec=bfd_elf64_s390_vec
     targ_selvecs=bfd_elf32_s390_vec
     want64=true

contrib/binutils/ld/configure.tgt

@@ -480,12 +480,21 @@ powerpc-*-lynxos*)	targ_emul=ppclynx ;;
 rs6000-*-aix5*)		targ_emul=aix5rs6 ;;
 rs6000-*-aix*)		targ_emul=aixrs6
 			;;
+s390x-*-freebsd*)         targ_emul=elf64_s390
+			targ_extra_emuls=elf_s390
+			targ_extra_libpath=$targ_extra_emuls
+			tdir_elf_s390=`echo ${targ_alias} | sed -e 's/s390x/s390/'` ;;
 s390x-*-linux*)         targ_emul=elf64_s390
 			targ_extra_emuls=elf_s390
 			targ_extra_libpath=$targ_extra_emuls
 			tdir_elf_s390=`echo ${targ_alias} | sed -e 's/s390x/s390/'` ;;
 s390x-*-tpf*)		targ_emul=elf64_s390
 			tdir_elf_s390=`echo ${targ_alias} | sed -e 's/s390x/s390/'` ;;
+s390-*-freebsd*)          targ_emul=elf_s390
+			targ64_extra_emuls=elf64_s390
+			targ64_extra_libpath=elf64_s390
+			tdir_elf64_s390=`echo ${targ_alias} | sed -e 's/s390/s390x/'`
+			;;
 s390-*-linux*)          targ_emul=elf_s390
 			targ64_extra_emuls=elf64_s390
 			targ64_extra_libpath=elf64_s390

contrib/binutils/ld/emulparams/elf64_s390_fbsd.sh

@@ -0,0 +1,2 @@
+. ${srcdir}/emulparams/elf64_s390.sh
+. ${srcdir}/emulparams/elf_fbsd.sh

contrib/binutils/ld/emulparams/elf_s390_fbsd.sh

@@ -0,0 +1,2 @@
+. ${srcdir}/emulparams/elf_s390.sh
+. ${srcdir}/emulparams/elf_fbsd.sh

contrib/gcc/config.gcc

@@ -1942,10 +1942,19 @@ rs6000-ibm-aix[56789].* | powerpc-ibm-aix[56789].*)
 	thread_file='aix'
 	extra_headers=
 	;;
+s390-*-freebsd*)
+	tm_file="${tm_file} dbxelf.h elfos.h ${fbsd_tm_file} s390/freebsd.h"
+	;;
 s390-*-linux*)
 	tm_file="s390/s390.h dbxelf.h elfos.h svr4.h linux.h s390/linux.h"
 	tmake_file="${tmake_file} t-dfprules s390/t-crtstuff s390/t-linux"
 	;;
+s390x-*-freebsd*)
+	tm_file="s390/s390.h s390/s390x.h dbxelf.h elfos.h ${fbsd_tm_file} s390/freebsd.h"
+	tm_p_file=s390/s390-protos.h
+	md_file=s390/s390.md
+	out_file=s390/s390.c
+	;;
 s390x-*-linux*)
 	tm_file="s390/s390x.h s390/s390.h dbxelf.h elfos.h svr4.h linux.h s390/linux.h"
 	tm_p_file=s390/s390-protos.h

contrib/gcc/config/s390/freebsd.h

@@ -0,0 +1,105 @@
+/* Definitions for FreeBSD for S/390.
+   Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005, 2006
+   Free Software Foundation, Inc.
+   Contributed by Hartmut Penner (hpenner@de.ibm.com) and
+                  Ulrich Weigand (uweigand@de.ibm.com).
+
+This file is part of GCC.
+
+GCC 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, or (at your option) any later
+version.
+
+GCC 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 GCC; see the file COPYING.  If not, write to the Free
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA.  */
+
+#ifndef _CONFIG_S390_FREEBSD_H
+#define _CONFIG_S390_FREEBSD_H
+
+/* Target specific version string.  */
+
+#ifdef DEFAULT_TARGET_64BIT
+#undef  TARGET_VERSION
+#define TARGET_VERSION fprintf (stderr, " (FreeBSD for zSeries)");
+#else
+#undef  TARGET_VERSION
+#define TARGET_VERSION fprintf (stderr, " (FreeBSD for S/390)");
+#endif
+
+
+/* Target specific type definitions.  */
+
+/* ??? Do we really want long as size_t on 31-bit?  */
+/* Answer is yes for FreeBSD. */
+#undef  SIZE_TYPE
+#define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
+#undef  PTRDIFF_TYPE
+#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
+
+#undef  WCHAR_TYPE
+#define WCHAR_TYPE "int"
+#undef  WCHAR_TYPE_SIZE
+#define WCHAR_TYPE_SIZE 32
+
+#undef DEFAULT_SIGNED_CHAR
+#define DEFAULT_SIGNED_CHAR 1
+
+/* Target specific assembler settings.  */
+
+#undef  ASM_SPEC
+#define ASM_SPEC "%{m31&m64}%{mesa&mzarch}%{march=*}"
+
+
+/* Target specific linker settings.  */
+
+#ifdef DEFAULT_TARGET_64BIT
+#define MULTILIB_DEFAULTS { "m64" }
+#else
+#define MULTILIB_DEFAULTS { "m31" }
+#endif
+
+#define GLIBC_DYNAMIC_LINKER32 "/lib/ld.so.1"
+#define GLIBC_DYNAMIC_LINKER64 "/lib/ld64.so.1"
+
+#undef  LINK_SPEC
+#define LINK_SPEC \
+  "%{m31:-m elf_s390}%{m64:-m elf64_s390} \
+   %{shared:-shared} \
+   %{!shared: \
+      %{static:-static} \
+      %{!static: \
+	%{rdynamic:-export-dynamic} \
+	%{!dynamic-linker: \
+          %{m31:-dynamic-linker " LINUX_DYNAMIC_LINKER32 "} \
+          %{m64:-dynamic-linker " LINUX_DYNAMIC_LINKER64 "}}}}"
+
+#define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
+
+#define TARGET_ASM_FILE_END file_end_indicate_exec_stack
+
+#define MD_UNWIND_SUPPORT "config/s390/freebsd-unwind.h"
+
+#ifdef TARGET_LIBC_PROVIDES_SSP
+/* s390 glibc provides __stack_chk_guard in 0x14(tp),
+   s390x glibc provides it at 0x28(tp).  */
+#define TARGET_THREAD_SSP_OFFSET        (TARGET_64BIT ? 0x28 : 0x14)
+#endif
+
+/* Define if long doubles should be mangled as 'g'.  */
+#define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
+
+/* Override the default comment-starter of "/APP" from unix.h.  */
+#undef  ASM_APP_ON
+#define ASM_APP_ON	"#APP\n"
+#undef  ASM_APP_OFF
+#define ASM_APP_OFF	"#NO_APP\n"
+
+#endif