[build] Move unwinder to toplevel libgcc (v2)

diff --git a/gcc/Makefile.in b/gcc/Makefile.in
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -377,8 +377,6 @@  USER_H = $(srcdir)/ginclude/float.h \
 USER_H_INC_NEXT_PRE = @user_headers_inc_next_pre@
 USER_H_INC_NEXT_POST = @user_headers_inc_next_post@
 
-UNWIND_H = $(srcdir)/unwind-generic.h
-
 # The GCC to use for compiling crt*.o.
 # Usually the one we just built.
 # Don't use this as a dependency--use $(GCC_PASSES).
@@ -688,18 +686,6 @@  CRTSTUFF_CFLAGS = -O2 $(GCC_CFLAGS) $(IN
   -fno-stack-protector \
   $(INHIBIT_LIBC_CFLAGS)
 
-# Additional sources to handle exceptions; overridden by targets as needed.
-LIB2ADDEH = $(srcdir)/unwind-dw2.c $(srcdir)/unwind-dw2-fde.c \
-   $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
-LIB2ADDEHSTATIC = $(LIB2ADDEH)
-LIB2ADDEHSHARED = $(LIB2ADDEH)
-
-# Don't build libunwind by default.
-LIBUNWIND =
-LIBUNWINDDEP =
-SHLIBUNWIND_LINK =
-SHLIBUNWIND_INSTALL =
-
 # nm flags to list global symbols in libgcc object files.
 SHLIB_NM_FLAGS = -pg
 
@@ -1894,7 +1880,7 @@  GCC_EXTRA_PARTS := $(sort $(EXTRA_MULTIL
 
 libgcc-support: libgcc.mvars stmp-int-hdrs $(TCONFIG_H) \
 	$(MACHMODE_H) $(FPBIT) $(DPBIT) $(TPBIT) $(LIB2ADD) \
-	$(LIB2ADD_ST) $(LIB2ADDEH) $(srcdir)/emutls.c gcov-iov.h $(SFP_MACHINE)
+	$(LIB2ADD_ST) gcov-iov.h $(SFP_MACHINE)
 
 libgcc.mvars: config.status Makefile $(LIB2ADD) $(LIB2ADD_ST) specs \
 		xgcc$(exeext)
@@ -1905,13 +1891,7 @@  libgcc.mvars: config.status Makefile $(L
 	echo LIB2FUNCS_EXCLUDE = '$(LIB2FUNCS_EXCLUDE)' >> tmp-libgcc.mvars
 	echo LIB2ADD = '$(call srcdirify,$(LIB2ADD))' >> tmp-libgcc.mvars
 	echo LIB2ADD_ST = '$(call srcdirify,$(LIB2ADD_ST))' >> tmp-libgcc.mvars
-	echo LIB2ADDEH = '$(call srcdirify,$(LIB2ADDEH) $(srcdir)/emutls.c)' >> tmp-libgcc.mvars
-	echo LIB2ADDEHSTATIC = '$(call srcdirify,$(LIB2ADDEHSTATIC) $(srcdir)/emutls.c)' >> tmp-libgcc.mvars
-	echo LIB2ADDEHSHARED = '$(call srcdirify,$(LIB2ADDEHSHARED) $(srcdir)/emutls.c)' >> tmp-libgcc.mvars
 	echo LIB2_SIDITI_CONV_FUNCS = '$(LIB2_SIDITI_CONV_FUNCS)' >> tmp-libgcc.mvars
-	echo LIBUNWIND = '$(call srcdirify,$(LIBUNWIND))' >> tmp-libgcc.mvars
-	echo SHLIBUNWIND_LINK = '$(SHLIBUNWIND_LINK)' >> tmp-libgcc.mvars
-	echo SHLIBUNWIND_INSTALL = '$(SHLIBUNWIND_INSTALL)' >> tmp-libgcc.mvars
 	echo FPBIT = '$(FPBIT)' >> tmp-libgcc.mvars
 	echo FPBIT_FUNCS = '$(FPBIT_FUNCS)' >> tmp-libgcc.mvars
 	echo LIB2_DIVMOD_FUNCS = '$(LIB2_DIVMOD_FUNCS)' >> tmp-libgcc.mvars
@@ -4096,7 +4076,7 @@  gcov-dump$(exeext): $(GCOV_DUMP_OBJS) $(
 # be rebuilt.
 
 # Build the include directories.
-stmp-int-hdrs: $(STMP_FIXINC) $(USER_H) $(UNWIND_H) fixinc_list
+stmp-int-hdrs: $(STMP_FIXINC) $(USER_H) fixinc_list
 # Copy in the headers provided with gcc.
 # The sed command gets just the last file name component;
 # this is necessary because VPATH could add a dirname.
@@ -4128,9 +4108,6 @@  stmp-int-hdrs: $(STMP_FIXINC) $(USER_H) 
 	    chmod a+r include/$$file; \
 	  fi; \
 	done
-	rm -f include/unwind.h
-	cp $(UNWIND_H) include/unwind.h
-	chmod a+r include/unwind.h
 	rm -f include/stdint.h
 	if [ $(USE_GCC_STDINT) = wrap ]; then \
 	  rm -f include/stdint-gcc.h; \
diff --git a/gcc/ada/gcc-interface/Makefile.in b/gcc/ada/gcc-interface/Makefile.in
--- a/gcc/ada/gcc-interface/Makefile.in
+++ b/gcc/ada/gcc-interface/Makefile.in
@@ -2796,7 +2796,7 @@  vx_stack_info.o : vx_stack_info.c
 
 raise-gcc.o : raise-gcc.c raise.h
 	$(COMPILER) -c $(ALL_COMPILERFLAGS) $(ADA_CFLAGS) \
-		-iquote $(srcdir) \
+		-iquote $(srcdir)/../libgcc \
 		$(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
 
 cio.o     : cio.c
diff --git a/gcc/config.gcc b/gcc/config.gcc
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -1604,9 +1604,6 @@  ia64*-*-freebsd*)
 ia64*-*-linux*)
 	tm_file="${tm_file} dbxelf.h elfos.h gnu-user.h linux.h glibc-stdint.h ia64/sysv4.h ia64/linux.h"
 	tmake_file="${tmake_file} ia64/t-ia64 t-libunwind ia64/t-glibc"
-	if test x$with_system_libunwind != xyes ; then
-		tmake_file="${tmake_file} t-libunwind-elf ia64/t-glibc-libunwind"
-	fi
 	target_cpu_default="MASK_GNU_AS|MASK_GNU_LD"
 	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtfastmath.o"
 	;;
diff --git a/gcc/config/arm/t-bpabi b/gcc/config/arm/t-bpabi
--- a/gcc/config/arm/t-bpabi
+++ b/gcc/config/arm/t-bpabi
@@ -25,11 +25,6 @@  LIB2FUNCS_EXTRA = $(srcdir)/config/arm/b
 
 LIB2FUNCS_STATIC_EXTRA = $(srcdir)/config/arm/fp16.c
 
-UNWIND_H = $(srcdir)/config/arm/unwind-arm.h
-LIB2ADDEH = $(srcdir)/config/arm/unwind-arm.c \
-  $(srcdir)/config/arm/libunwind.S \
-  $(srcdir)/config/arm/pr-support.c $(srcdir)/unwind-c.c
-
 # Add the BPABI names.
 SHLIB_MAPFILES += $(srcdir)/config/arm/libgcc-bpabi.ver
 
diff --git a/gcc/config/arm/t-symbian b/gcc/config/arm/t-symbian
--- a/gcc/config/arm/t-symbian
+++ b/gcc/config/arm/t-symbian
@@ -30,10 +30,6 @@  LIB1ASMFUNCS += \
 	_truncdfsf2 _negsf2 _addsubsf3 _muldivsf3 _cmpsf2 _unordsf2 \
 	_fixsfsi _fixunssfsi
 
-# Include the gcc personality routine
-UNWIND_H = $(srcdir)/config/arm/unwind-arm.h
-LIB2ADDEH = $(srcdir)/unwind-c.c $(srcdir)/config/arm/pr-support.c
-
 # Include half-float helpers.
 LIB2FUNCS_STATIC_EXTRA = $(srcdir)/config/arm/fp16.c
 
diff --git a/gcc/config/frv/t-frv b/gcc/config/frv/t-frv
--- a/gcc/config/frv/t-frv
+++ b/gcc/config/frv/t-frv
@@ -1,4 +1,4 @@ 
-# Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2003, 2004, 2011 Free Software Foundation, Inc.
 #
 # This file is part of GCC.
 #
@@ -81,12 +81,12 @@  EXTRA_MULTILIB_PARTS=frvbegin.o frvend.o
 FRVSTUFF_CFLAGS = $(TARGET_LIBGCC2_CFLAGS)
 
 $(T)frvbegin$(objext): $(srcdir)/config/frv/frvbegin.c $(GCC_PASSES) \
-  $(CONFIG_H) defaults.h unwind-dw2-fde.h gbl-ctors.h
+  $(CONFIG_H) defaults.h $(srcdir)/../libgcc/unwind-dw2-fde.h gbl-ctors.h
 	$(GCC_FOR_TARGET) $(GCC_CFLAGS) $(INCLUDES) $(MULTILIB_CFLAGS) $(FRVSTUFF_CFLAGS) \
 	  -c $(srcdir)/config/frv/frvbegin.c -o $(T)frvbegin$(objext)
 
 $(T)frvend$(objext): $(srcdir)/config/frv/frvend.c $(GCC_PASSES) \
-  $(CONFIG_H) defaults.h unwind-dw2-fde.h gbl-ctors.h
+  $(CONFIG_H) defaults.h $(srcdir)/../libgcc/unwind-dw2-fde.h gbl-ctors.h
 	$(GCC_FOR_TARGET) $(GCC_CFLAGS) $(INCLUDES) $(MULTILIB_CFLAGS) $(FRVSTUFF_CFLAGS) \
 	  -c $(srcdir)/config/frv/frvend.c -o $(T)frvend$(objext)
 
diff --git a/gcc/config/ia64/t-glibc b/gcc/config/ia64/t-glibc
--- a/gcc/config/ia64/t-glibc
+++ b/gcc/config/ia64/t-glibc
@@ -1,5 +1,1 @@ 
-# Use system libunwind library on IA-64 GLIBC based system.
-LIB2ADDEH = $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c \
-  $(srcdir)/unwind-compat.c
-
 SHLIB_MAPFILES += $(srcdir)/config/ia64/libgcc-glibc.ver
diff --git a/gcc/config/ia64/t-hpux b/gcc/config/ia64/t-hpux
--- a/gcc/config/ia64/t-hpux
+++ b/gcc/config/ia64/t-hpux
@@ -1,5 +1,5 @@ 
 # Copyright (C) 2001, 2002, 2003, 2004, 2005,
-# 2006 Free Software Foundation, Inc.
+# 2006, 2011 Free Software Foundation, Inc.
 #
 # This file is part of GCC.
 #
@@ -50,8 +50,6 @@  LIBGCC1_TEST =
 
 T_CFLAGS += -DUSE_LIBUNWIND_EXCEPTIONS
 
-LIB2ADDEH = $(srcdir)/unwind-c.c
-
 SHLIB_EXT = .so
 # Must include -lunwind in the link, so that libgcc_s.so has the necessary
 # DT_NEEDED entry for libunwind.
diff --git a/gcc/config/ia64/t-ia64 b/gcc/config/ia64/t-ia64
--- a/gcc/config/ia64/t-ia64
+++ b/gcc/config/ia64/t-ia64
@@ -43,9 +43,6 @@  SHLIB_MAPFILES += $(srcdir)/config/ia64/
 # Effectively disable the crtbegin/end rules using crtstuff.c
 T = disable
 
-LIB2ADDEH = $(srcdir)/config/ia64/unwind-ia64.c $(srcdir)/unwind-sjlj.c \
-  $(srcdir)/unwind-c.c
-
 ia64-c.o: $(srcdir)/config/ia64/ia64-c.c $(CONFIG_H) $(SYSTEM_H) \
     coretypes.h $(TM_H) $(TREE_H) $(CPPLIB_H) $(C_COMMON_H) $(C_PRAGMA_H)
 	$(COMPILER) -c $(ALL_COMPILERFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) \
diff --git a/gcc/config/ia64/t-vms b/gcc/config/ia64/t-vms
--- a/gcc/config/ia64/t-vms
+++ b/gcc/config/ia64/t-vms
@@ -32,8 +32,6 @@  CRTSTUFF_T_CFLAGS_S = -O0
 	$(GCC_FOR_TARGET) -I. -c -o $(T)crtinitS.o -x assembler-with-cpp \
 		$(srcdir)/config/ia64/vms-crtinit.asm
 
-LIB2ADDEH += $(srcdir)/config/ia64/fde-vms.c
-
 # Shared library macros
 shlib_version:=$(shell echo $(BASEVER_c) | sed -e 's/\./,/' -e 's/\.//g')
 SHLIB_EXT = .exe
diff --git a/gcc/config/ia64/vms.h b/gcc/config/ia64/vms.h
--- a/gcc/config/ia64/vms.h
+++ b/gcc/config/ia64/vms.h
@@ -139,9 +139,6 @@  STATIC func_ptr __CTOR_LIST__[1]        
 /* Define this to be nonzero if static stack checking is supported.  */
 #define STACK_CHECK_STATIC_BUILTIN 1
 
-#define UNW_IVMS_MODE(HEADER) (((HEADER) >> 44) & 0x3L)
-#define MD_UNW_COMPATIBLE_PERSONALITY_P(HEADER) (!UNW_IVMS_MODE (HEADER))
-
 /* Minimum amount of stack required to recover from an anticipated stack
    overflow detection.  The default value conveys an estimate of the amount
    of stack required to propagate an exception.  */
diff --git a/gcc/config/picochip/t-picochip b/gcc/config/picochip/t-picochip
--- a/gcc/config/picochip/t-picochip
+++ b/gcc/config/picochip/t-picochip
@@ -43,9 +43,6 @@  LIB2FUNCS_EXTRA = \
 LIB1ASMFUNCS = _mulsc3 _divsc3
 LIB1ASMSRC = picochip/libgccExtras/fake_libgcc.asm
 
-# Turn off the building of exception handling libraries.
-LIB2ADDEH =
-
 # Turn off ranlib on target libraries.
 RANLIB_FOR_TARGET = cat
 
diff --git a/gcc/config/rs6000/aix.h b/gcc/config/rs6000/aix.h
--- a/gcc/config/rs6000/aix.h
+++ b/gcc/config/rs6000/aix.h
@@ -209,40 +209,6 @@ 
 /* And similarly for general purpose registers.  */
 #define GP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 32)
 
-/* 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.  */
-
-#define R_LR 65
-
-#ifdef __64BIT__
-#define MD_FROB_UPDATE_CONTEXT(CTX, FS)					\
-  do {									\
-    if ((FS)->regs.reg[2].how == REG_UNSAVED)				\
-      {									\
-	unsigned int *insn						\
-	  = (unsigned int *)						\
-	    _Unwind_GetGR ((CTX), R_LR);				\
-	if (*insn == 0xE8410028)					\
-	  _Unwind_SetGRPtr ((CTX), 2, (CTX)->cfa + 40);			\
-      }									\
-  } while (0)
-#else
-#define MD_FROB_UPDATE_CONTEXT(CTX, FS)					\
-  do {									\
-    if ((FS)->regs.reg[2].how == REG_UNSAVED)				\
-      {									\
-	unsigned int *insn						\
-	  = (unsigned int *)						\
-	    _Unwind_GetGR ((CTX), R_LR);				\
-	if (*insn == 0x80410014)					\
-	  _Unwind_SetGRPtr ((CTX), 2, (CTX)->cfa + 20);			\
-      }									\
-  } while (0)
-#endif
-
 #define PROFILE_HOOK(LABEL)   output_profile_hook (LABEL)
 
 /* No version of AIX fully supports AltiVec or 64-bit instructions in
diff --git a/gcc/config/rs6000/t-darwin b/gcc/config/rs6000/t-darwin
--- a/gcc/config/rs6000/t-darwin
+++ b/gcc/config/rs6000/t-darwin
@@ -1,5 +1,5 @@ 
 # Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006,
-# 2007 Free Software Foundation, Inc.
+# 2007, 2011 Free Software Foundation, Inc.
 #
 # This file is part of GCC.
 #
@@ -40,7 +40,5 @@  TARGET_LIBGCC2_CFLAGS = -Wa,-force_cpusu
 # Export the _xlq* symbols from darwin-ldouble.c.
 SHLIB_MAPFILES += $(srcdir)/config/rs6000/libgcc-ppc64.ver
 
-LIB2ADDEH += $(srcdir)/config/rs6000/darwin-fallback.c
-
 darwin-fpsave.o:	$(srcdir)/config/rs6000/darwin-asm.h
 darwin-tramp.o:		$(srcdir)/config/rs6000/darwin-asm.h
diff --git a/gcc/config/sh/t-sh b/gcc/config/sh/t-sh
--- a/gcc/config/sh/t-sh
+++ b/gcc/config/sh/t-sh
@@ -1,5 +1,5 @@ 
 # Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
-# 2003, 2004, 2006, 2008, 2009 Free Software Foundation, Inc.
+# 2003, 2004, 2006, 2008, 2009, 2011 Free Software Foundation, Inc.
 #
 # This file is part of GCC.
 #
@@ -149,7 +149,7 @@  EXTRA_MULTILIB_PARTS= $(IC_EXTRA_PARTS) 
 	$(GCC_FOR_TARGET) $(MULTILIB_CFLAGS) -c -o $@ -DL_sdivsi3_i4i -x assembler-with-cpp $<
 $(T)udivsi3_i4i-Os-4-200.o: $(srcdir)/config/sh/lib1funcs-Os-4-200.asm $(GCC_PASSES)
 	$(GCC_FOR_TARGET) $(MULTILIB_CFLAGS) -c -o $@ -DL_udivsi3_i4i -x assembler-with-cpp $<
-$(T)unwind-dw2-Os-4-200.o: $(srcdir)/unwind-dw2.c $(srcdir)/unwind-generic.h unwind-pe.h unwind.inc unwind-dw2-fde.h unwind-dw2.h $(CONFIG_H) coretypes.h $(TM_H) $(MACHMODE_H) longlong.h config.status stmp-int-hdrs tsystem.h $(GCC_PASSES)
+$(T)unwind-dw2-Os-4-200.o: $(srcdir)/../libgcc/unwind-dw2.c $(srcdir)/../libgcc/unwind-generic.h $(srcdir)/../libgcc/unwind-pe.h $(srcdir)/../libgcc/unwind.inc $(srcdir)/../libgcc/unwind-dw2-fde.h $(srcdir)/../libgcc/unwind-dw2.h $(CONFIG_H) coretypes.h $(TM_H) $(MACHMODE_H) longlong.h config.status stmp-int-hdrs tsystem.h $(GCC_PASSES)
 	$(GCC_FOR_TARGET) $(MULTILIB_CFLAGS) $(LIBGCC2_CFLAGS) $(INCLUDES) $(vis_hide) -fexceptions -Os -c -o $@ $<
 OBJS_Os_4_200=$(T)sdivsi3_i4i-Os-4-200.o $(T)udivsi3_i4i-Os-4-200.o $(T)unwind-dw2-Os-4-200.o
 $(T)libgcc-Os-4-200.a: $(OBJS_Os_4_200) $(GCC_PASSES)
diff --git a/gcc/config/spu/t-spu-elf b/gcc/config/spu/t-spu-elf
--- a/gcc/config/spu/t-spu-elf
+++ b/gcc/config/spu/t-spu-elf
@@ -47,9 +47,6 @@  LIB2FUNCS_STATIC_EXTRA = $(srcdir)/confi
 			 $(srcdir)/config/spu/divmodti4.c \
 			 $(srcdir)/config/spu/divv2df3.c
 
-LIB2ADDEH = $(srcdir)/unwind-dw2.c $(srcdir)/unwind-dw2-fde.c \
-   $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
-
 # We want fine grained libraries, so use the new code to build the
 # floating point emulation libraries.
 FPBIT = fp-bit.c
diff --git a/gcc/config/t-darwin b/gcc/config/t-darwin
--- a/gcc/config/t-darwin
+++ b/gcc/config/t-darwin
@@ -42,10 +42,6 @@  darwin-driver.o: $(srcdir)/config/darwin
 	$(COMPILER) -c $(ALL_COMPILERFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) \
 	  $(srcdir)/config/darwin-driver.c
 
-# Use unwind-dw2-fde-darwin
-LIB2ADDEH = $(srcdir)/unwind-dw2.c $(srcdir)/unwind-dw2-fde-darwin.c \
-  $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
-
 # -pipe because there's an assembler bug, 4077127, which causes
 # it to not properly process the first # directive, causing temporary
 # file names to appear in stabs, causing the bootstrap to fail.  Using -pipe
diff --git a/gcc/config/t-freebsd b/gcc/config/t-freebsd
--- a/gcc/config/t-freebsd
+++ b/gcc/config/t-freebsd
@@ -3,7 +3,3 @@  CRTSTUFF_T_CFLAGS_S = $(CRTSTUFF_T_CFLAG
 
 # Compile libgcc.a with pic.
 TARGET_LIBGCC2_CFLAGS += -fPIC
-
-# Use unwind-dw2-fde-glibc
-LIB2ADDEH = $(srcdir)/unwind-dw2.c $(srcdir)/unwind-dw2-fde-glibc.c \
-  $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
diff --git a/gcc/config/t-libunwind b/gcc/config/t-libunwind
--- a/gcc/config/t-libunwind
+++ b/gcc/config/t-libunwind
@@ -1,4 +1,4 @@ 
-# Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2003, 2004, 2011 Free Software Foundation, Inc.
 #
 # This file is part of GCC.
 #
@@ -22,9 +22,6 @@ 
 # so that the resulting libgcc_s.so has the necessary DT_NEEDED entry for
 # libunwind.
 SHLIB_LC = -lunwind -lc
-LIB2ADDEH = $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c \
-  $(srcdir)/unwind-compat.c $(srcdir)/unwind-dw2-fde-compat.c
-LIB2ADDEHSTATIC = $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
 
 T_CFLAGS += -DUSE_LIBUNWIND_EXCEPTIONS
 TARGET_LIBGCC2_CFLAGS += -DUSE_GAS_SYMVER
diff --git a/gcc/config/t-linux b/gcc/config/t-linux
--- a/gcc/config/t-linux
+++ b/gcc/config/t-linux
@@ -25,7 +25,3 @@  TARGET_LIBGCC2_CFLAGS = -fPIC
 # Override t-slibgcc-elf-ver to export some libgcc symbols with
 # the symbol versions that glibc used.
 SHLIB_MAPFILES += $(srcdir)/config/libgcc-glibc.ver
-
-# Use unwind-dw2-fde-glibc
-LIB2ADDEH = $(srcdir)/unwind-dw2.c $(srcdir)/unwind-dw2-fde-glibc.c \
-  $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
diff --git a/gcc/config/t-sol2 b/gcc/config/t-sol2
--- a/gcc/config/t-sol2
+++ b/gcc/config/t-sol2
@@ -31,8 +31,3 @@  sol2.o: $(srcdir)/config/sol2.c $(CONFIG
 
 # This is required by gcc/ada/gcc-interface/Makefile.in.
 TARGET_LIBGCC2_CFLAGS = -fPIC
-
-# Use unwind-dw2-fde-glibc.c.  Unless linker support and dl_iterate_phdr
-# are present, automatically falls back to unwind-dw2-fde.c.
-LIB2ADDEH = $(srcdir)/unwind-dw2.c $(srcdir)/unwind-dw2-fde-glibc.c \
-  $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
diff --git a/gcc/config/xtensa/t-xtensa b/gcc/config/xtensa/t-xtensa
--- a/gcc/config/xtensa/t-xtensa
+++ b/gcc/config/xtensa/t-xtensa
@@ -1,4 +1,5 @@ 
-# Copyright (C) 2002, 2003, 2006, 2007, 2008 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2003, 2006, 2007, 2008, 2011
+# Free Software Foundation, Inc.
 #
 # This file is part of GCC.
 #
@@ -29,8 +30,6 @@  LIB1ASMFUNCS = _mulsi3 _divsi3 _modsi3 _
 	_truncdfsf2 _extendsfdf2
 
 LIB2FUNCS_EXTRA = $(srcdir)/config/xtensa/lib2funcs.S
-LIB2ADDEH = $(srcdir)/config/xtensa/unwind-dw2-xtensa.c \
-   $(srcdir)/unwind-dw2-fde.c $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
 
 $(T)crti.o: $(srcdir)/config/xtensa/crti.asm $(GCC_PASSES)
 	$(GCC_FOR_TARGET) $(GCC_CFLAGS) $(MULTILIB_CFLAGS) $(INCLUDES) \
diff --git a/gcc/configure.ac b/gcc/configure.ac
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -1192,11 +1192,6 @@  if test $force_sjlj_exceptions = yes; th
     [Define 0/1 to force the choice for exception handling model.])
 fi
 
-# For platforms with the unwind ABI which includes an unwind library,
-# libunwind, we can choose to use the system libunwind.
-# config.gcc also contains tests of with_system_libunwind.
-GCC_CHECK_UNWIND_GETIPINFO
-
 # --------------------------------------------------------
 # Build, host, and target specific configuration fragments
 # --------------------------------------------------------
diff --git a/gcc/po/EXCLUDES b/gcc/po/EXCLUDES
--- a/gcc/po/EXCLUDES
+++ b/gcc/po/EXCLUDES
@@ -44,15 +44,6 @@  libgcc2.h
 limitx.h
 limity.h
 longlong.h
-unwind-c.c
-unwind-dw2-fde-darwin.c
-unwind-dw2-fde-glibc.c
-unwind-dw2-fde.c
-unwind-dw2-fde.h
-unwind-dw2.c
-unwind-pe.h
-unwind-sjlj.c
-unwind.h
 
 #   These programs are meant to be executed only by GCC maintainers or
 #   installers.  Such files do not need to be translated, as these
diff --git a/gcc/system.h b/gcc/system.h
--- a/gcc/system.h
+++ b/gcc/system.h
@@ -802,7 +802,7 @@  extern void fancy_abort (const char *, i
 /* Target macros only used for code built for the target, that have
    moved to libgcc-tm.h or have never been present elsewhere.  */
  #pragma GCC poison DECLARE_LIBRARY_RENAMES LIBGCC2_GNU_PREFIX		\
-	MD_UNWIND_SUPPORT ENABLE_EXECUTE_STACK
+	MD_UNWIND_SUPPORT MD_FROB_UPDATE_CONTEXT ENABLE_EXECUTE_STACK
 
 /* Other obsolete target macros, or macros that used to be in target
    headers and were not used, and may be obsolete or may never have
diff --git a/libgcc/Makefile.in b/libgcc/Makefile.in
--- a/libgcc/Makefile.in
+++ b/libgcc/Makefile.in
@@ -256,6 +256,17 @@  LIBGCC_VER_GNU_PREFIX = __
 LIBGCC_VER_FIXEDPOINT_GNU_PREFIX = __
 LIBGCC_VER_SYMBOLS_PREFIX =
 
+# Additional sources to handle exceptions; overridden by targets as needed.
+LIB2ADDEH = $(srcdir)/unwind-dw2.c $(srcdir)/unwind-dw2-fde.c \
+  $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
+LIB2ADDEHSTATIC = $(LIB2ADDEH)
+LIB2ADDEHSHARED = $(LIB2ADDEH)
+
+# Don't build libunwind by default.
+LIBUNWIND =
+SHLIBUNWIND_LINK =
+SHLIBUNWIND_INSTALL =
+
 tmake_file = @tmake_file@
 include $(srcdir)/empty.mk $(tmake_file)
 
@@ -316,6 +327,10 @@  endif
 
 LIB2ADD += enable-execute-stack.c
 
+LIB2ADDEH += $(srcdir)/emutls.c
+LIB2ADDEHSTATIC += $(srcdir)/emutls.c
+LIB2ADDEHSHARED += $(srcdir)/emutls.c
+
 # Library members defined in libgcc2.c.
 lib2funcs = _muldi3 _negdi2 _lshrdi3 _ashldi3 _ashrdi3 _cmpdi2 _ucmpdi2	   \
 	    _clear_cache _trampoline __main _absvsi2 \
@@ -967,6 +982,12 @@  gcc-extra-parts:
 
 all: $(extra-parts)
 
+install-unwind_h:
+	cp unwind.h $(gcc_objdir)/include/unwind.h
+	chmod a+r $(gcc_objdir)/include/unwind.h
+
+all: install-unwind_h
+
 # Documentation targets (empty).
 .PHONY: info html dvi pdf install-info install-html install-pdf
 
diff --git a/libgcc/config.host b/libgcc/config.host
--- a/libgcc/config.host
+++ b/libgcc/config.host
@@ -57,12 +57,15 @@ 
 #  tmake_file		A list of machine-description-specific
 #			makefile-fragments, if different from
 #			"$cpu_type/t-$cpu_type".
+#  unwind_header	The name of the header file declaring the unwind
+#			runtime interface routines.
 
 asm_hidden_op=.hidden
 enable_execute_stack=
 extra_parts=
 tmake_file=
 md_unwind_header=no-unwind.h
+unwind_header=unwind-generic.h
 
 # Set default cpu_type so it can be updated in each machine entry.
 cpu_type=`echo ${host} | sed 's/-.*$//'`
@@ -171,8 +174,10 @@  case ${host} in
   # This is the generic ELF configuration of FreeBSD.  Later
   # machine-specific sections may refine and add to this
   # configuration.
+  tmake_file=t-eh-dw2-dip
   ;;
-*-*-linux* | frv-*-*linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu | *-*-gnu*)
+*-*-linux* | frv-*-*linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu | *-*-gnu* | *-*-kopensolaris*-gnu)
+  tmake_file=t-eh-dw2-dip
   extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
   ;;
 *-*-netbsd*)
@@ -182,7 +187,9 @@  case ${host} in
 *-*-rtems*)
   ;;
 *-*-solaris2*)
-  tmake_file="$tmake_file t-sol2 t-slibgcc t-slibgcc-elf-ver"
+  # Unless linker support and dl_iterate_phdr are present,
+  # unwind-dw2-fde-dip.c automatically falls back to unwind-dw2-fde.c.
+  tmake_file="$tmake_file t-sol2 t-eh-dw2-dip t-slibgcc t-slibgcc-elf-ver"
   if test $with_gnu_ld = yes; then
     tmake_file="$tmake_file t-slibgcc-gld"
   else
@@ -265,14 +272,35 @@  arm*-*-netbsdelf*)
 	;;
 arm*-*-linux*)			# ARM GNU/Linux with ELF
 	tmake_file="${tmake_file} t-fixedpoint-gnu-prefix"
+	case ${host} in
+	arm*-*-linux-*eabi)
+	  tmake_file="${tmake_file} arm/t-bpabi"
+	  unwind_header=config/arm/unwind-arm.h
+	  ;;
+	esac
 	;;
 arm*-*-uclinux*)		# ARM ucLinux
 	tmake_file="${tmake_file} t-fixedpoint-gnu-prefix"
+	case ${host} in
+	arm*-*-uclinux*eabi)
+	  tmake_file="${tmake_file} arm/t-bpabi"
+	  unwind_header=config/arm/unwind-arm.h
+	  ;;
+	esac
 	;;
 arm*-*-ecos-elf)
 	;;
 arm*-*-eabi* | arm*-*-symbianelf* )
 	tmake_file="${tmake_file} t-fixedpoint-gnu-prefix"
+	case ${host} in
+	arm*-*-eabi*)
+	  tmake_file="${tmake_file} arm/t-bpabi"
+	  ;;
+	arm*-*-symbianelf*)
+	  tmake_file="${tmake_file} arm/t-symbian"
+	  ;;
+	esac
+	unwind_header=config/arm/unwind-arm.h
 	;;
 arm*-*-rtems*)
 	;;
@@ -408,21 +436,25 @@  i[34567]86-*-interix3*)
 	;;
 ia64*-*-elf*)
 	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtfastmath.o"
-	tmake_file="ia64/t-ia64 t-crtfm"
+	tmake_file="ia64/t-ia64 ia64/t-eh-ia64 t-crtfm"
 	;;
 ia64*-*-freebsd*)
 	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtfastmath.o"
-	tmake_file="ia64/t-ia64 t-crtfm"
+	tmake_file="ia64/t-ia64 ia64/t-eh-ia64 t-crtfm"
 	;;
 ia64*-*-linux*)
 	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtfastmath.o"
-	tmake_file="ia64/t-ia64 t-crtfm t-softfp ia64/t-fprules-softfp ia64/t-softfp-compat"
+	tmake_file="ia64/t-ia64 t-crtfm t-softfp ia64/t-fprules-softfp ia64/t-softfp-compat ia64/t-glibc ia64/t-eh-ia64 t-libunwind"
+	if test x$with_system_libunwind != xyes ; then
+		tmake_file="${tmake_file} t-libunwind-elf ia64/t-glibc-libunwind"
+	fi
 	md_unwind_header=ia64/linux-unwind.h
 	;;
 ia64*-*-hpux*)
+	tmake_file="ia64/t-hpux"
 	;;
 ia64-hp-*vms*)
-	tmake_file="vms/t-vms vms/t-vms64 ia64/t-vms"
+	tmake_file="vms/t-vms vms/t-vms64 ia64/t-eh-ia64 ia64/t-vms"
 	md_unwind_header=ia64/vms-unwind.h
 	;;
 iq2000*-*-elf*)
@@ -522,6 +554,7 @@  moxie-*-*)
 pdp11-*-*)
 	;;
 picochip-*-*)
+	tmake_file=picochip/t-picochip
         ;;
 powerpc-*-darwin*)
 	case ${host} in
@@ -574,10 +607,13 @@  powerpcle-*-eabisim*)
 powerpcle-*-eabi*)
 	;;
 rs6000-ibm-aix4.[3456789]* | powerpc-ibm-aix4.[3456789]*)
+	md_unwind_header=rs6000/aix-unwind.h
 	;;
 rs6000-ibm-aix5.1.* | powerpc-ibm-aix5.1.*)
+	md_unwind_header=rs6000/aix-unwind.h
 	;;
 rs6000-ibm-aix[56789].* | powerpc-ibm-aix[56789].*)
+	md_unwind_header=rs6000/aix-unwind.h
 	;;
 rx-*-elf)
 	extra_parts="crtbegin.o crtend.o"
@@ -592,7 +628,7 @@  s390x-*-linux*)
 	md_unwind_header=s390/linux-unwind.h
 	;;
 s390x-ibm-tpf*)
-	tmake_file="${tmake_file} s390/t-crtstuff s390/t-tpf"
+	tmake_file="${tmake_file} s390/t-crtstuff s390/t-tpf t-eh-dw2-dip"
 	md_unwind_header=s390/tpf-unwind.h
 	;;
 score-*-elf)
@@ -674,8 +710,10 @@  vax-*-openbsd*)
 xstormy16-*-elf)
 	;;
 xtensa*-*-elf*)
+	tmake_file=xtensa/t-xtensa
 	;;
 xtensa*-*-linux*)
+	tmake_file=xtensa/t-xtensa
 	md_unwind_header=xtensa/linux-unwind.h
 	;;
 am33_2.0-*-linux*)
diff --git a/gcc/config/arm/libunwind.S b/libgcc/config/arm/libunwind.S
rename from gcc/config/arm/libunwind.S
rename to libgcc/config/arm/libunwind.S
--- a/gcc/config/arm/libunwind.S
+++ b/libgcc/config/arm/libunwind.S
@@ -1,5 +1,5 @@ 
 /* Support functions for the unwinder.
-   Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010
+   Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
    Free Software Foundation, Inc.
    Contributed by Paul Brook
 
@@ -40,7 +40,7 @@ 
 
 #ifndef __symbian__
 
-#include "lib1funcs.asm"
+#include "config/arm/lib1funcs.asm"
 
 .macro UNPREFIX name
 	.global SYM (\name)
diff --git a/gcc/config/arm/pr-support.c b/libgcc/config/arm/pr-support.c
rename from gcc/config/arm/pr-support.c
rename to libgcc/config/arm/pr-support.c
diff --git a/libgcc/config/arm/t-bpabi b/libgcc/config/arm/t-bpabi
new file mode 100644
--- /dev/null
+++ b/libgcc/config/arm/t-bpabi
@@ -0,0 +1,3 @@ 
+LIB2ADDEH = $(srcdir)/config/arm/unwind-arm.c \
+  $(srcdir)/config/arm/libunwind.S \
+  $(srcdir)/config/arm/pr-support.c $(srcdir)/unwind-c.c
diff --git a/libgcc/config/arm/t-symbian b/libgcc/config/arm/t-symbian
new file mode 100644
--- /dev/null
+++ b/libgcc/config/arm/t-symbian
@@ -0,0 +1,2 @@ 
+# Include the gcc personality routine
+LIB2ADDEH = $(srcdir)/unwind-c.c $(srcdir)/config/arm/pr-support.c
diff --git a/gcc/config/arm/unwind-arm.c b/libgcc/config/arm/unwind-arm.c
rename from gcc/config/arm/unwind-arm.c
rename to libgcc/config/arm/unwind-arm.c
diff --git a/gcc/config/arm/unwind-arm.h b/libgcc/config/arm/unwind-arm.h
rename from gcc/config/arm/unwind-arm.h
rename to libgcc/config/arm/unwind-arm.h
diff --git a/gcc/config/ia64/fde-glibc.c b/libgcc/config/ia64/fde-glibc.c
rename from gcc/config/ia64/fde-glibc.c
rename to libgcc/config/ia64/fde-glibc.c
diff --git a/gcc/config/ia64/fde-vms.c b/libgcc/config/ia64/fde-vms.c
rename from gcc/config/ia64/fde-vms.c
rename to libgcc/config/ia64/fde-vms.c
--- a/gcc/config/ia64/fde-vms.c
+++ b/libgcc/config/ia64/fde-vms.c
@@ -1,4 +1,4 @@ 
-/* Copyright (C) 2004, 2009 Free Software Foundation, Inc.
+/* Copyright (C) 2004, 2009, 2011 Free Software Foundation, Inc.
    Contributed by Douglas B Rupp <rupp@gnat.com>
 
    This file is part of GCC.
@@ -32,6 +32,7 @@ 
 #include <stddef.h>
 #include <stdlib.h>
 #include <stdio.h>
+#include "md-unwind-support.h"
 #include "unwind-ia64.h"
 
 #define __int64 long
diff --git a/libgcc/config/ia64/t-eh-ia64 b/libgcc/config/ia64/t-eh-ia64
new file mode 100644
--- /dev/null
+++ b/libgcc/config/ia64/t-eh-ia64
@@ -0,0 +1,2 @@ 
+LIB2ADDEH = $(srcdir)/config/ia64/unwind-ia64.c $(srcdir)/unwind-sjlj.c \
+  $(srcdir)/unwind-c.c
diff --git a/libgcc/config/ia64/t-glibc b/libgcc/config/ia64/t-glibc
new file mode 100644
--- /dev/null
+++ b/libgcc/config/ia64/t-glibc
@@ -0,0 +1,3 @@ 
+# Use system libunwind library on IA-64 GLIBC based system.
+LIB2ADDEH = $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c \
+  $(srcdir)/unwind-compat.c
diff --git a/gcc/config/ia64/t-glibc-libunwind b/libgcc/config/ia64/t-glibc-libunwind
rename from gcc/config/ia64/t-glibc-libunwind
rename to libgcc/config/ia64/t-glibc-libunwind
--- a/gcc/config/ia64/t-glibc-libunwind
+++ b/libgcc/config/ia64/t-glibc-libunwind
@@ -1,4 +1,3 @@ 
 # Build libunwind for IA-64 GLIBC based system.
 LIBUNWIND = $(srcdir)/config/ia64/fde-glibc.c \
   $(srcdir)/config/ia64/unwind-ia64.c
-LIBUNWINDDEP = unwind.inc
diff --git a/libgcc/config/ia64/t-hpux b/libgcc/config/ia64/t-hpux
new file mode 100644
--- /dev/null
+++ b/libgcc/config/ia64/t-hpux
@@ -0,0 +1,1 @@ 
+LIB2ADDEH = $(srcdir)/unwind-c.c
diff --git a/libgcc/config/ia64/t-vms b/libgcc/config/ia64/t-vms
new file mode 100644
--- /dev/null
+++ b/libgcc/config/ia64/t-vms
@@ -0,0 +1,1 @@ 
+LIB2ADDEH += $(srcdir)/config/ia64/fde-vms.c
diff --git a/gcc/config/ia64/unwind-ia64.c b/libgcc/config/ia64/unwind-ia64.c
rename from gcc/config/ia64/unwind-ia64.c
rename to libgcc/config/ia64/unwind-ia64.c
--- a/gcc/config/ia64/unwind-ia64.c
+++ b/libgcc/config/ia64/unwind-ia64.c
@@ -41,13 +41,6 @@ 
 
 #ifndef __USING_SJLJ_EXCEPTIONS__
 
-
-/* By default, assume personality routine interface compatibility with
-   our expectations.  */
-#ifndef MD_UNW_COMPATIBLE_PERSONALITY_P
-#define MD_UNW_COMPATIBLE_PERSONALITY_P(HEADER) 1
-#endif
-
 enum unw_application_register
 {
   UNW_AR_BSP,
@@ -1768,6 +1761,13 @@  _Unwind_GetBSP (struct _Unwind_Context *
 }
 
 #include "md-unwind-support.h"
+
+/* By default, assume personality routine interface compatibility with
+   our expectations.  */
+#ifndef MD_UNW_COMPATIBLE_PERSONALITY_P
+#define MD_UNW_COMPATIBLE_PERSONALITY_P(HEADER) 1
+#endif
+
 
 static _Unwind_Reason_Code
 uw_frame_state_for (struct _Unwind_Context *context, _Unwind_FrameState *fs)
diff --git a/gcc/config/ia64/unwind-ia64.h b/libgcc/config/ia64/unwind-ia64.h
rename from gcc/config/ia64/unwind-ia64.h
rename to libgcc/config/ia64/unwind-ia64.h
diff --git a/libgcc/config/ia64/vms-unwind.h b/libgcc/config/ia64/vms-unwind.h
--- a/libgcc/config/ia64/vms-unwind.h
+++ b/libgcc/config/ia64/vms-unwind.h
@@ -1,5 +1,5 @@ 
 /* DWARF2 EH unwinding support for IA64 VMS.
-   Copyright (C) 2005-2009 Free Software Foundation, Inc.
+   Copyright (C) 2005-2011 Free Software Foundation, Inc.
 
    This file is part of GCC.
 
@@ -32,6 +32,9 @@ 
 #include <stdio.h>
 #include <string.h>
 
+#define UNW_IVMS_MODE(HEADER) (((HEADER) >> 44) & 0x3L)
+#define MD_UNW_COMPATIBLE_PERSONALITY_P(HEADER) (!UNW_IVMS_MODE (HEADER))
+
 #define DYN$C_SSENTRY 66
 /* ??? would rather get the proper header file.  */
 
diff --git a/libgcc/config/picochip/t-picochip b/libgcc/config/picochip/t-picochip
new file mode 100644
--- /dev/null
+++ b/libgcc/config/picochip/t-picochip
@@ -0,0 +1,2 @@ 
+# Turn off the building of exception handling libraries.
+LIB2ADDEH =
diff --git a/libgcc/config/rs6000/aix-unwind.h b/libgcc/config/rs6000/aix-unwind.h
new file mode 100644
--- /dev/null
+++ b/libgcc/config/rs6000/aix-unwind.h
@@ -0,0 +1,57 @@ 
+/* DWARF2 EH unwinding support for AIX.
+   Copyright (C) 2011 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/>.  */
+
+/* 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.  */
+
+#define R_LR 65
+
+#ifdef __64BIT__
+#define MD_FROB_UPDATE_CONTEXT(CTX, FS)					\
+  do {									\
+    if ((FS)->regs.reg[2].how == REG_UNSAVED)				\
+      {									\
+	unsigned int *insn						\
+	  = (unsigned int *)						\
+	    _Unwind_GetGR ((CTX), R_LR);				\
+	if (*insn == 0xE8410028)					\
+	  _Unwind_SetGRPtr ((CTX), 2, (CTX)->cfa + 40);			\
+      }									\
+  } while (0)
+#else
+#define MD_FROB_UPDATE_CONTEXT(CTX, FS)					\
+  do {									\
+    if ((FS)->regs.reg[2].how == REG_UNSAVED)				\
+      {									\
+	unsigned int *insn						\
+	  = (unsigned int *)						\
+	    _Unwind_GetGR ((CTX), R_LR);				\
+	if (*insn == 0x80410014)					\
+	  _Unwind_SetGRPtr ((CTX), 2, (CTX)->cfa + 20);			\
+      }									\
+  } while (0)
+#endif
diff --git a/gcc/config/rs6000/darwin-fallback.c b/libgcc/config/rs6000/darwin-fallback.c
rename from gcc/config/rs6000/darwin-fallback.c
rename to libgcc/config/rs6000/darwin-fallback.c
diff --git a/libgcc/config/rs6000/t-darwin b/libgcc/config/rs6000/t-darwin
--- a/libgcc/config/rs6000/t-darwin
+++ b/libgcc/config/rs6000/t-darwin
@@ -3,4 +3,6 @@  DARWIN_EXTRA_CRT_BUILD_CFLAGS = -mlongca
 crt2.o: $(srcdir)/config/rs6000/darwin-crt2.c
 	$(crt_compile) $(DARWIN_EXTRA_CRT_BUILD_CFLAGS) -c $<
 
+LIB2ADDEH += $(srcdir)/config/rs6000/darwin-fallback.c
+
 SHLIB_VERPFX = $(gcc_srcdir)/config/rs6000/darwin-libgcc
diff --git a/libgcc/config/s390/t-tpf b/libgcc/config/s390/t-tpf
--- a/libgcc/config/s390/t-tpf
+++ b/libgcc/config/s390/t-tpf
@@ -1,7 +1,2 @@ 
 # Compile libgcc2.a with pic.
 HOST_LIBGCC2_CFLAGS += -fPIC
-
-# Use unwind-dw2-fde-glibc.
-LIB2ADDEH = $(gcc_srcdir)/unwind-dw2.c $(gcc_srcdir)/unwind-dw2-fde-glibc.c \
-  $(gcc_srcdir)/unwind-sjlj.c $(gcc_srcdir)/unwind-c.c \
-  $(gcc_srcdir)/emutls.c
diff --git a/libgcc/config/t-darwin b/libgcc/config/t-darwin
--- a/libgcc/config/t-darwin
+++ b/libgcc/config/t-darwin
@@ -2,3 +2,7 @@ 
 crt3.o: $(srcdir)/config/darwin-crt3.c
 	$(crt_compile) \
 	  -fno-tree-dominator-opts $(DARWIN_EXTRA_CRT_BUILD_CFLAGS) -c $<
+
+# Use unwind-dw2-fde-darwin
+LIB2ADDEH = $(srcdir)/unwind-dw2.c $(srcdir)/config/unwind-dw2-fde-darwin.c \
+  $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
diff --git a/libgcc/config/t-eh-dw2-dip b/libgcc/config/t-eh-dw2-dip
new file mode 100644
--- /dev/null
+++ b/libgcc/config/t-eh-dw2-dip
@@ -0,0 +1,3 @@ 
+# Use unwind-dw2-fde-dip.
+LIB2ADDEH = $(srcdir)/unwind-dw2.c $(srcdir)/unwind-dw2-fde-dip.c \
+  $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
diff --git a/libgcc/config/t-libunwind b/libgcc/config/t-libunwind
new file mode 100644
--- /dev/null
+++ b/libgcc/config/t-libunwind
@@ -0,0 +1,3 @@ 
+LIB2ADDEH = $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c \
+  $(srcdir)/unwind-compat.c $(srcdir)/unwind-dw2-fde-compat.c
+LIB2ADDEHSTATIC = $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
diff --git a/gcc/config/t-libunwind-elf b/libgcc/config/t-libunwind-elf
rename from gcc/config/t-libunwind-elf
rename to libgcc/config/t-libunwind-elf
--- a/gcc/config/t-libunwind-elf
+++ b/libgcc/config/t-libunwind-elf
@@ -1,4 +1,4 @@ 
-# Copyright (C) 2004, 2005 Free Software Foundation, Inc.
+# Copyright (C) 2004, 2005, 2011 Free Software Foundation, Inc.
 #
 # This file is part of GCC.
 #
@@ -18,14 +18,18 @@ 
 
 # Build libunwind for ELF with the GNU linker.
 
-# Use unwind-dw2-fde-glibc
-LIBUNWIND = $(srcdir)/unwind-dw2.c $(srcdir)/unwind-dw2-fde-glibc.c
-LIBUNWINDDEP = unwind.inc unwind-dw2-fde.h unwind-dw2-fde.c
+SHLIB_SOLINK = @shlib_base_name@.so
+SHLIB_OBJS = @shlib_objs@
+SHLIB_DIR = @multilib_dir@
+SHLIB_SLIBDIR_QUAL = @shlib_slibdir_qual@
+
+# Use unwind-dw2-fde-dip
+LIBUNWIND = $(srcdir)/unwind-dw2.c $(srcdir)/unwind-dw2-fde-dip.c
 
 SHLIBUNWIND_SOVERSION = 7
 SHLIBUNWIND_SONAME = @shlib_base_name@.so.$(SHLIBUNWIND_SOVERSION)
 
-SHLIBUNWIND_LINK = $(GCC_FOR_TARGET) $(LIBGCC2_CFLAGS) -shared \
+SHLIBUNWIND_LINK = $(CC) $(LIBGCC2_CFLAGS) -shared \
 	-nodefaultlibs -Wl,-h,$(SHLIBUNWIND_SONAME) \
 	-Wl,-z,text -Wl,-z,defs -o $(SHLIB_DIR)/$(SHLIBUNWIND_SONAME).tmp \
 	@multilib_flags@ $(SHLIB_OBJS) -lc && \
@@ -38,12 +42,10 @@  SHLIBUNWIND_LINK = $(GCC_FOR_TARGET) $(L
 	   $(SHLIB_DIR)/$(SHLIBUNWIND_SONAME) && \
 	$(LN_S) $(SHLIBUNWIND_SONAME) $(SHLIB_DIR)/$(SHLIB_SOLINK)
 
-# $(slibdir) double quoted to protect it from expansion while building
-# libgcc.mk.  We want this delayed until actual install time.
 SHLIBUNWIND_INSTALL = \
-	$$(SHELL) $$(srcdir)/mkinstalldirs $$(DESTDIR)$$(slibdir)$(SHLIB_SLIBDIR_QUAL); \
+	$(SHELL) $(srcdir)/mkinstalldirs $(DESTDIR)$(slibdir)$(SHLIB_SLIBDIR_QUAL); \
 	$(INSTALL_DATA) $(SHLIB_DIR)/$(SHLIBUNWIND_SONAME) \
-	  $$(DESTDIR)$$(slibdir)$(SHLIB_SLIBDIR_QUAL)/$(SHLIBUNWIND_SONAME); \
-	rm -f $$(DESTDIR)$$(slibdir)$(SHLIB_SLIBDIR_QUAL)/$(SHLIB_SOLINK); \
+	  $(DESTDIR)$(slibdir)$(SHLIB_SLIBDIR_QUAL)/$(SHLIBUNWIND_SONAME); \
+	rm -f $(DESTDIR)$(slibdir)$(SHLIB_SLIBDIR_QUAL)/$(SHLIB_SOLINK); \
 	$(LN_S) $(SHLIBUNWIND_SONAME) \
-	  $$(DESTDIR)$$(slibdir)$(SHLIB_SLIBDIR_QUAL)/$(SHLIB_SOLINK)
+	  $(DESTDIR)$(slibdir)$(SHLIB_SLIBDIR_QUAL)/$(SHLIB_SOLINK)
diff --git a/libgcc/config/t-sol2 b/libgcc/config/t-sol2
--- a/libgcc/config/t-sol2
+++ b/libgcc/config/t-sol2
@@ -16,11 +16,6 @@ 
 # along with GCC; see the file COPYING3.  If not see
 # <http://www.gnu.org/licenses/>.
 
-# Use unwind-dw2-fde-glibc.c.  Unless linker support and dl_iterate_phdr
-# are present, automatically falls back to unwind-dw2-fde.c.
-LIB2ADDEH = $(gcc_srcdir)/unwind-dw2.c $(gcc_srcdir)/unwind-dw2-fde-glibc.c \
-  $(gcc_srcdir)/unwind-sjlj.c $(gcc_srcdir)/unwind-c.c $(gcc_srcdir)/emutls.c
-
 # gmon build rule:
 gmon.o:	$(srcdir)/config/gmon-sol2.c
 	$(gcc_compile) -c $<
diff --git a/gcc/unwind-dw2-fde-darwin.c b/libgcc/config/unwind-dw2-fde-darwin.c
rename from gcc/unwind-dw2-fde-darwin.c
rename to libgcc/config/unwind-dw2-fde-darwin.c
diff --git a/libgcc/config/xtensa/t-xtensa b/libgcc/config/xtensa/t-xtensa
new file mode 100644
--- /dev/null
+++ b/libgcc/config/xtensa/t-xtensa
@@ -0,0 +1,2 @@ 
+LIB2ADDEH = $(srcdir)/config/xtensa/unwind-dw2-xtensa.c \
+   $(srcdir)/unwind-dw2-fde.c $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
diff --git a/gcc/config/xtensa/unwind-dw2-xtensa.c b/libgcc/config/xtensa/unwind-dw2-xtensa.c
rename from gcc/config/xtensa/unwind-dw2-xtensa.c
rename to libgcc/config/xtensa/unwind-dw2-xtensa.c
diff --git a/gcc/config/xtensa/unwind-dw2-xtensa.h b/libgcc/config/xtensa/unwind-dw2-xtensa.h
rename from gcc/config/xtensa/unwind-dw2-xtensa.h
rename to libgcc/config/xtensa/unwind-dw2-xtensa.h
diff --git a/libgcc/configure.ac b/libgcc/configure.ac
--- a/libgcc/configure.ac
+++ b/libgcc/configure.ac
@@ -7,6 +7,7 @@  sinclude(../config/no-executables.m4)
 sinclude(../config/lib-ld.m4)
 sinclude(../config/override.m4)
 sinclude(../config/dfp.m4)
+sinclude(../config/unwind_ipinfo.m4)
 
 AC_PREREQ(2.64)
 AC_INIT([GNU C Runtime Library], 1.0,,[libgcc])
@@ -167,6 +168,11 @@  AC_CACHE_CHECK([whether fixed-point is s
 fixed_point=$libgcc_cv_fixed_point
 AC_SUBST(fixed_point)
 
+# For platforms with the unwind ABI which includes an unwind library,
+# libunwind, we can choose to use the system libunwind.
+# config.gcc also contains tests of with_system_libunwind.
+GCC_CHECK_UNWIND_GETIPINFO
+
 AC_LIB_PROG_LD_GNU
 
 AC_MSG_CHECKING([for thread model used by GCC])
@@ -277,6 +283,7 @@  AC_SUBST(cpu_type)
 AC_SUBST(extra_parts)
 AC_SUBST(asm_hidden_op)
 AC_CONFIG_LINKS([enable-execute-stack.c:$enable_execute_stack])
+AC_CONFIG_LINKS([unwind.h:$unwind_header])
 AC_CONFIG_LINKS([md-unwind-support.h:config/$md_unwind_header])
 
 # We need multilib support.
diff --git a/gcc/emutls.c b/libgcc/emutls.c
rename from gcc/emutls.c
rename to libgcc/emutls.c
diff --git a/gcc/unwind-c.c b/libgcc/unwind-c.c
rename from gcc/unwind-c.c
rename to libgcc/unwind-c.c
diff --git a/gcc/unwind-compat.c b/libgcc/unwind-compat.c
rename from gcc/unwind-compat.c
rename to libgcc/unwind-compat.c
diff --git a/gcc/unwind-compat.h b/libgcc/unwind-compat.h
rename from gcc/unwind-compat.h
rename to libgcc/unwind-compat.h
diff --git a/gcc/unwind-dw2-fde-compat.c b/libgcc/unwind-dw2-fde-compat.c
rename from gcc/unwind-dw2-fde-compat.c
rename to libgcc/unwind-dw2-fde-compat.c
diff --git a/gcc/unwind-dw2-fde-glibc.c b/libgcc/unwind-dw2-fde-dip.c
rename from gcc/unwind-dw2-fde-glibc.c
rename to libgcc/unwind-dw2-fde-dip.c
diff --git a/gcc/unwind-dw2-fde.c b/libgcc/unwind-dw2-fde.c
rename from gcc/unwind-dw2-fde.c
rename to libgcc/unwind-dw2-fde.c
diff --git a/gcc/unwind-dw2-fde.h b/libgcc/unwind-dw2-fde.h
rename from gcc/unwind-dw2-fde.h
rename to libgcc/unwind-dw2-fde.h
diff --git a/gcc/unwind-dw2.c b/libgcc/unwind-dw2.c
rename from gcc/unwind-dw2.c
rename to libgcc/unwind-dw2.c
diff --git a/gcc/unwind-dw2.h b/libgcc/unwind-dw2.h
rename from gcc/unwind-dw2.h
rename to libgcc/unwind-dw2.h
diff --git a/gcc/unwind-generic.h b/libgcc/unwind-generic.h
rename from gcc/unwind-generic.h
rename to libgcc/unwind-generic.h
diff --git a/gcc/unwind-pe.h b/libgcc/unwind-pe.h
rename from gcc/unwind-pe.h
rename to libgcc/unwind-pe.h
diff --git a/gcc/unwind-sjlj.c b/libgcc/unwind-sjlj.c
rename from gcc/unwind-sjlj.c
rename to libgcc/unwind-sjlj.c
diff --git a/gcc/unwind.inc b/libgcc/unwind.inc
rename from gcc/unwind.inc
rename to libgcc/unwind.inc
diff --git a/libgo/Makefile.am b/libgo/Makefile.am
--- a/libgo/Makefile.am
+++ b/libgo/Makefile.am
@@ -38,7 +38,7 @@  ACLOCAL_AMFLAGS = -I ./config -I ../conf
 
 AM_CFLAGS = -fexceptions -fplan9-extensions $(SPLIT_STACK) $(WARN_CFLAGS) \
 	$(STRINGOPS_FLAG) \
-	-I $(srcdir)/../gcc -I $(MULTIBUILDTOP)../../gcc/include
+	-I $(srcdir)/../libgcc -I $(MULTIBUILDTOP)../../gcc/include
 
 if USING_SPLIT_STACK
 AM_LDFLAGS = -XCClinker $(SPLIT_STACK)
diff --git a/libjava/Makefile.am b/libjava/Makefile.am
--- a/libjava/Makefile.am
+++ b/libjava/Makefile.am
@@ -342,7 +342,7 @@  LIBLINK = $(LIBTOOL) --tag=CXX $(LIBTOOL
 CXXLINK = $(LIBTOOL) --tag=CXX $(LIBTOOLFLAGS) --mode=link $(CXXLD) \
 	  $(AM_CXXFLAGS) $(CXXFLAGS) $(AM_LDFLAGS) $(LTLDFLAGS) -o $@
 
-GCC_UNWIND_INCLUDE = @GCC_UNWIND_INCLUDE@
+LIBGCC_UNWIND_INCLUDE = @LIBGCC_UNWIND_INCLUDE@
 
 WARNINGS = -Wextra -Wall
 ## Some systems don't allow `$' in identifiers by default, so we force
@@ -410,7 +410,7 @@  AM_CPPFLAGS = -I$(top_srcdir) \
 	-Iclasspath/include \
 	-I$(top_srcdir)/classpath/native/fdlibm \
 	$(GCINCS) $(THREADINCS) $(INCLTDL) \
-	$(GCC_UNWIND_INCLUDE) $(ZINCS) $(LIBFFIINCS)
+	$(LIBGCC_UNWIND_INCLUDE) $(ZINCS) $(LIBFFIINCS)
 
 BOOTCLASSPATH = $(srcdir)/classpath/lib
 
diff --git a/libjava/configure.ac b/libjava/configure.ac
--- a/libjava/configure.ac
+++ b/libjava/configure.ac
@@ -469,7 +469,7 @@  case "${which_gcj}" in
    cross)
       if test "x${with_newlib}" = "xyes"; then
          # FIXME (comment): Why is this needed?
-         GCC_UNWIND_INCLUDE=
+         LIBGCC_UNWIND_INCLUDE=
       fi
       GCJH='$(target_noncanonical)-gcjh'
    ;;
@@ -1204,8 +1204,8 @@  AC_SUBST(HASH_SYNC_SPEC)
 
 AM_CONDITIONAL(USING_GCC, test "$GCC" = yes)
 
-# We're in the tree with gcc, and need to include some of its headers.
-GCC_UNWIND_INCLUDE='-I$(multi_basedir)/./libjava/../gcc'
+# We're in the tree with libgcc, and need to include some of its headers.
+LIBGCC_UNWIND_INCLUDE='-I$(multi_basedir)/./libjava/../libgcc'
 
 if test "x${with_newlib}" = "xyes"; then
    # We are being configured with a cross compiler.  AC_REPLACE_FUNCS
@@ -1569,7 +1569,7 @@  AM_CONDITIONAL(NATIVE, test "$NATIVE" = 
 AM_CONDITIONAL(ENABLE_SHARED, test "$enable_shared" = yes)
 AM_CONDITIONAL(NEEDS_DATA_START, test "$NEEDS_DATA_START" = yes && test "$NATIVE" = yes)
 AM_CONDITIONAL(INSTALL_BINARIES, test -z "${with_multisubdir}")
-AC_SUBST(GCC_UNWIND_INCLUDE)
+AC_SUBST(LIBGCC_UNWIND_INCLUDE)
 
 # Process the option "--enable-version-specific-runtime-libs"
 # Calculate toolexeclibdir
diff --git a/libobjc/Makefile.in b/libobjc/Makefile.in
--- a/libobjc/Makefile.in
+++ b/libobjc/Makefile.in
@@ -101,6 +101,7 @@  OBJC_BOEHM_GC_LIBS=../boehm-gc/libgcjgc_
 INCLUDES = -I$(srcdir)/$(MULTISRCTOP)../gcc \
   -I$(srcdir)/$(MULTISRCTOP)../gcc/config \
   -I$(MULTIBUILDTOP)../../$(host_subdir)/gcc \
+  -I$(srcdir)/$(MULTISRCTOP)../libgcc \
   -I$(srcdir)/$(MULTISRCTOP)../include \
   $(OBJC_BOEHM_GC_INCLUDES)
 
diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -685,9 +685,9 @@  AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
   fi
 
   # Stuff in the actual top level.  Currently only used by libsupc++ to
-  # get unwind* headers from the gcc dir.
-  #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
-  TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
+  # get unwind* headers from the libgcc dir.
+  #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include'
+  TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc'
 
   # Now, export this to all the little Makefiles....
   AC_SUBST(GLIBCXX_INCLUDES)