config.host: Add bits to support powerpc64-*-freebsd*.

2012-03-21  Andreas Tobler  <andreast@fgznet.ch>

        * config.host: Add bits to support powerpc64-*-freebsd*.
        * config/rs6000/freebsd-unwind.h: New file.
        * config/rs6000/t-freebsd64: New file.

From-SVN: r185614

libgcc/ChangeLog

@@ -1,3 +1,9 @@
+2012-03-21  Andreas Tobler  <andreast@fgznet.ch>
+
+	* config.host: Add bits to support powerpc64-*-freebsd*.
+	* config/rs6000/freebsd-unwind.h: New file.
+	* config/rs6000/t-freebsd64: New file.
+
 2012-03-20  Richard Guenther  <rguenther@suse.de>
 
 	PR gcov-profile/52627

libgcc/config.host

@@ -830,9 +830,15 @@ powerpc64-*-darwin*)
 	tmake_file="$tmake_file rs6000/t-darwin64 rs6000/t-ibm-ldouble"
 	extra_parts="$extra_parts crt2.o"
 	;;
-powerpc-*-freebsd*)
+powerpc*-*-freebsd*)
-	tmake_file="${tmake_file} rs6000/t-ppccomm rs6000/t-savresfgpr rs6000/t-crtstuff rs6000/t-freebsd t-softfp-sfdf t-softfp-excl t-softfp t-slibgcc-libgcc"
+	tmake_file="${tmake_file} rs6000/t-ppccomm rs6000/t-savresfgpr rs6000/t-crtstuff rs6000/t-freebsd t-softfp-sfdf t-softfp-excl t-softfp"
 	extra_parts="$extra_parts crtbeginT.o ecrti.o ecrtn.o ncrti.o ncrtn.o"
+	case ${host} in
+	powerpc64*)
+	  tmake_file="${tmake_file} rs6000/t-freebsd64"
+	  md_unwind_header=rs6000/freebsd-unwind.h
+	  ;;
+	esac
 	;;
 powerpc-*-netbsd*)
 	tmake_file="$tmake_file rs6000/t-netbsd rs6000/t-crtstuff"

libgcc/config/rs6000/freebsd-unwind.h

@@ -0,0 +1,69 @@
+/* DWARF2 EH unwinding support for PowerPC64 FreeBSD.
+   Copyright (C) 2012 Free Software Foundation, Inc.
+
+   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 3, 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.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#define R_LR		65
+
+#define MD_FROB_UPDATE_CONTEXT frob_update_context
+
+static void
+frob_update_context (struct _Unwind_Context *context,
+		     _Unwind_FrameState *fs ATTRIBUTE_UNUSED)
+{
+  const unsigned int *pc = (const unsigned int *) context->ra;
+
+#ifdef __powerpc64__
+  if (fs->regs.reg[2].how == REG_UNSAVED)
+    {
+      /* If the current unwind info (FS) does not contain explicit info
+	 saving R2, then we have to do a minor amount of code reading to
+	 figure out if it was saved.  The big problem here is that the
+	 code that does the save/restore is generated by the linker, so
+	 we have no good way to determine at compile time what to do.  */
+      if (pc[0] == 0xF8410028
+	  || ((pc[0] & 0xFFFF0000) == 0x3D820000
+	      && pc[1] == 0xF8410028))
+	{
+	  /* We are in a plt call stub or r2 adjusting long branch stub,
+	     before r2 has been saved.  Keep REG_UNSAVED.  */
+	}
+      else
+	{
+	  unsigned int *insn
+	    = (unsigned int *) _Unwind_GetGR (context, R_LR);
+	  if (insn && *insn == 0xE8410028)
+	    _Unwind_SetGRPtr (context, 2, context->cfa + 40);
+	  else if (pc[0] == 0x4E800421
+		   && pc[1] == 0xE8410028)
+	    {
+	      /* We are at the bctrl instruction in a call via function
+		 pointer.  gcc always emits the load of the new R2 just
+		 before the bctrl so this is the first and only place
+		 we need to use the stored R2.  */
+	      _Unwind_Word sp = _Unwind_GetGR (context, 1);
+	      _Unwind_SetGRPtr (context, 2, (void *)(sp + 40));
+	    }
+	}
+    }
+#endif
+}

libgcc/config/rs6000/t-freebsd64

@@ -0,0 +1,5 @@
+HOST_LIBGCC2_CFLAGS += -mno-minimal-toc
+SHLIB_MAPFILES = libgcc-std.ver
+
+softfp_wrap_start := '\#ifndef __powerpc64__'
+softfp_wrap_end := '\#endif'