configure.in: Check for ld.

	* configure.in: Check for ld.
	(HAVE_LD_EH_FRAME_HDR): Define if ld supports --eh-frame-hdr option.
	* configure, config.in: Rebuilt.
	* config.gcc: Add crtbeginT.o to extra_parts where needed.
	* config/t-linux (LIB2ADDEH, LIB2ADDEHDEP): Use unwind-dw2-fde-glibc
	frame unwinding on Linux.
	* config/t-linux-gnulibc1 (LIB2ADDEH, LIB2ADDEHDEP): Use unwind-dw2-fde
	frame unwinding.
	* config/linux.h (STARTFILE_SPEC): Use crtbeginT.o for -static.
	(LINK_EH_SPEC): Define.
	* config/i386/gnu.h (STARTFILE_SPEC): Use crtbeginT.o for -static.
	* config/ia64/linux.h (STARTFILE_SPEC, LINK_EH_SPEC): Define.
	* config/ia64/fde-glibc.c (_Unwind_IteratePhdrCallback): Don't
	iterate further if pc falls into current library, but fde was not
	found.
	* config/sparc/linux.h (STARTFILE_SPEC): Use crtbeginT.o for -static
	if using glibc.
	(LINK_EH_SPEC): Define.
	* config/sparc/linux64.h (STARTFILE_SPEC32, STARTFILE_SPEC64):
	Use crtbeginT.o for -static.
	(LINK_EH_SPEC): Define.
	* config/sparc/t-linux64 (EXTRA_MULTILIB_PARTS): Add crtbeginT.o.
	* Makefile.in (crtbeginT.o): Add rule.
	* gcc.c (init_gcc_specs): For -static-libgcc, use -lgcc -lgcc_eh.
	If neither -static-libgcc nor -shared-libgcc is passed and -shared,
	use -lgcc if LINK_EH_SPEC is defined and -lgcc_s -lgcc if not.
	If none of the above switches are passed, use -lgcc -lgcc_eh.
	(init_spec): If LINK_EH_SPEC is defined, prepend it to link_spec.
	* mklibgcc.in: Don't include LIB2ADDEH objects into libgcc.a if
	creating libgcc_s.so, put them into separate libgcc_eh.a instead.
	* unwind-dw2-fde.c: Don't include any headers if this file
	is included from other .c file.
	* unwind-dw2-fde-glibc.c: New file.
	* crtstuff.c (USE_PT_GNU_EH_FRAME, USE_EH_FRAME_REGISTRY): Define.
	Use it instead of EH_FRAME_SECTION_NAME where appropriate.

From-SVN: r48039

20 files changed, 731 insertions, 47 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f4321c3..36f16c6 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,41 @@
+2001-12-15  Jakub Jelinek  <jakub@redhat.com>
+
+	* configure.in: Check for ld.
+	(HAVE_LD_EH_FRAME_HDR): Define if ld supports --eh-frame-hdr option.
+	* configure, config.in: Rebuilt.
+	* config.gcc: Add crtbeginT.o to extra_parts where needed.
+	* config/t-linux (LIB2ADDEH, LIB2ADDEHDEP): Use unwind-dw2-fde-glibc
+	frame unwinding on Linux.
+	* config/t-linux-gnulibc1 (LIB2ADDEH, LIB2ADDEHDEP): Use unwind-dw2-fde
+	frame unwinding.
+	* config/linux.h (STARTFILE_SPEC): Use crtbeginT.o for -static.
+	(LINK_EH_SPEC): Define.
+	* config/i386/gnu.h (STARTFILE_SPEC): Use crtbeginT.o for -static.
+	* config/ia64/linux.h (STARTFILE_SPEC, LINK_EH_SPEC): Define.
+	* config/ia64/fde-glibc.c (_Unwind_IteratePhdrCallback): Don't
+	iterate further if pc falls into current library, but fde was not
+	found.
+	* config/sparc/linux.h (STARTFILE_SPEC): Use crtbeginT.o for -static
+	if using glibc.
+	(LINK_EH_SPEC): Define.
+	* config/sparc/linux64.h (STARTFILE_SPEC32, STARTFILE_SPEC64):
+	Use crtbeginT.o for -static.
+	(LINK_EH_SPEC): Define.
+	* config/sparc/t-linux64 (EXTRA_MULTILIB_PARTS): Add crtbeginT.o.
+	* Makefile.in (crtbeginT.o): Add rule.
+	* gcc.c (init_gcc_specs): For -static-libgcc, use -lgcc -lgcc_eh.
+	If neither -static-libgcc nor -shared-libgcc is passed and -shared,
+	use -lgcc if LINK_EH_SPEC is defined and -lgcc_s -lgcc if not.
+	If none of the above switches are passed, use -lgcc -lgcc_eh.
+	(init_spec): If LINK_EH_SPEC is defined, prepend it to link_spec.
+	* mklibgcc.in: Don't include LIB2ADDEH objects into libgcc.a if
+	creating libgcc_s.so, put them into separate libgcc_eh.a instead.
+	* unwind-dw2-fde.c: Don't include any headers if this file
+	is included from other .c file.
+	* unwind-dw2-fde-glibc.c: New file.
+	* crtstuff.c (USE_PT_GNU_EH_FRAME, USE_EH_FRAME_REGISTRY): Define.
+	Use it instead of EH_FRAME_SECTION_NAME where appropriate.
+
 2001-12-14  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* builtins.c (expand_builtin_memcmp): Mark parameter with
diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index adb7281..ecba14f 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -1106,6 +1106,15 @@ $(T)crtendS.o: crtstuff.c $(GCC_PASSES) $(TCONFIG_H) auto-host.h \
 	  -c $(srcdir)/crtstuff.c -DCRT_END -DCRTSTUFFS_O \
 	  -o $(T)crtendS$(objext)
 
+# This is a version of crtbegin for -static links.
+$(T)crtbeginT.o: crtstuff.c $(GCC_PASSES) $(TCONFIG_H) auto-host.h \
+  gbl-ctors.h stmp-int-hdrs tsystem.h
+	$(GCC_FOR_TARGET) $(GCC_CFLAGS) $(INCLUDES) $(MULTILIB_CFLAGS) -g0 \
+	  -finhibit-size-directive -fno-inline-functions \
+	  -fno-exceptions $(CRTSTUFF_T_CFLAGS) @inhibit_libc@ \
+	  -c $(srcdir)/crtstuff.c -DCRT_BEGIN -DCRTSTUFFT_O \
+	  -o $(T)crtbeginT$(objext)
+
 # Compile the start modules crt0.o and mcrt0.o that are linked with
 # every program
 crt0.o: s-crt0 ; @true
@@ -2384,7 +2393,7 @@ mostlyclean: $(INTL_MOSTLYCLEAN) lang.mostlyclean
 # that don't exist in the distribution.
 INTL_CLEAN = intl.clean
 clean: mostlyclean $(INTL_CLEAN) lang.clean
-	-rm -f libgcc.a libgcc_s$(SHLIB_EXT) libgcc_s$(SHLIB_EXT).1
+	-rm -f libgcc.a libgcc_eh.a libgcc_s$(SHLIB_EXT) libgcc_s$(SHLIB_EXT).1
 	-rm -f config.h tconfig.h hconfig.h tm_p.h
 	-rm -f cs-*
 	-rm -rf libgcc
@@ -3140,11 +3149,15 @@ stage1-start:
 	-if [ -f as$(exeext) ] ; then (cd stage1 && $(LN_S) ../as$(exeext) .) ; else true ; fi
 	-if [ -f ld$(exeext) ] ; then (cd stage1 && $(LN_S) ../ld$(exeext) .) ; else true ; fi
 	-if [ -f collect-ld$(exeext) ] ; then (cd stage1 && $(LN_S) ../collect-ld$(exeext) .) ; else true ; fi
-	-rm -f stage1/libgcc.a
+	-rm -f stage1/libgcc.a stage1/libgcc_eh.a
 	-cp libgcc.a stage1
 	-if $(RANLIB_TEST_FOR_TARGET) ; then \
 	  $(RANLIB_FOR_TARGET) stage1/libgcc.a; \
 	else true; fi
+	-if [ -f libgcc_eh.a ] ; then cp libgcc_eh.a stage1; \
+	  if $(RANLIB_TEST_FOR_TARGET) ; then \
+	   $(RANLIB_FOR_TARGET) stage1/libgcc_eh.a; \
+	  else true; fi; fi
 	-for f in .. $(EXTRA_MULTILIB_PARTS); do if [ x$${f} != x.. ]; then \
 	  cp stage1/$${f} . ; \
 	else true; \
@@ -3165,11 +3178,15 @@ stage2-start:
 	-if [ -f as$(exeext) ] ; then (cd stage2 && $(LN_S) ../as$(exeext) .) ; else true ; fi
 	-if [ -f ld$(exeext) ] ; then (cd stage2 && $(LN_S) ../ld$(exeext) .) ; else true ; fi
 	-if [ -f collect-ld$(exeext) ] ; then (cd stage2 && $(LN_S) ../collect-ld$(exeext) .) ; else true ; fi
-	-rm -f stage2/libgcc.a
+	-rm -f stage2/libgcc.a stage2/libgcc_eh.a
 	-cp libgcc.a stage2
 	-if $(RANLIB_TEST_FOR_TARGET) ; then \
 	  $(RANLIB_FOR_TARGET) stage2/libgcc.a; \
 	else true; fi
+	-if [ -f libgcc_eh.a ] ; then cp libgcc_eh.a stage2; \
+	  if $(RANLIB_TEST_FOR_TARGET) ; then \
+	   $(RANLIB_FOR_TARGET) stage2/libgcc_eh.a; \
+	  else true; fi; fi
 	-for f in .. $(EXTRA_MULTILIB_PARTS); do if [ x$${f} != x.. ]; then \
 	  cp stage2/$${f} . ; \
 	else true; \
@@ -3190,11 +3207,15 @@ stage3-start:
 	-if [ -f as$(exeext) ] ; then (cd stage3 && $(LN_S) ../as$(exeext) .) ; else true ; fi
 	-if [ -f ld$(exeext) ] ; then (cd stage3 && $(LN_S) ../ld$(exeext) .) ; else true ; fi
 	-if [ -f collect-ld$(exeext) ] ; then (cd stage3 && $(LN_S) ../collect-ld$(exeext) .) ; else true ; fi
-	-rm -f stage3/libgcc.a
+	-rm -f stage3/libgcc.a stage3/libgcc_eh.a
 	-cp libgcc.a stage3
 	-if $(RANLIB_TEST_FOR_TARGET) ; then \
 	  $(RANLIB_FOR_TARGET) stage3/libgcc.a; \
 	else true; fi
+	-if [ -f libgcc_eh.a ] ; then cp libgcc_eh.a stage3; \
+	  if $(RANLIB_TEST_FOR_TARGET) ; then \
+	   $(RANLIB_FOR_TARGET) stage3/libgcc_eh.a; \
+	  else true; fi; fi
 	-for f in .. $(EXTRA_MULTILIB_PARTS); do if [ x$${f} != x.. ]; then \
 	  cp stage3/$${f} . ; \
 	else true; \
@@ -3215,11 +3236,15 @@ stage4-start:
 	-if [ -f as$(exeext) ] ; then (cd stage4 && $(LN_S) ../as$(exeext) .) ; else true ; fi
 	-if [ -f ld$(exeext) ] ; then (cd stage4 && $(LN_S) ../ld$(exeext) .) ; else true ; fi
 	-if [ -f collect-ld$(exeext) ] ; then (cd stage4 && $(LN_S) ../collect-ld$(exeext) .) ; else true ; fi
-	-rm -f stage4/libgcc.a
+	-rm -f stage4/libgcc.a stage4/libgcc_eh.a
 	-cp libgcc.a stage4
 	-if $(RANLIB_TEST_FOR_TARGET) ; then \
 	  $(RANLIB_FOR_TARGET) stage4/libgcc.a; \
 	else true; fi
+	-if [ -f libgcc_eh.a ] ; then cp libgcc_eh.a stage4; \
+	  if $(RANLIB_TEST_FOR_TARGET) ; then \
+	   $(RANLIB_FOR_TARGET) stage4/libgcc_eh.a; \
+	  else true; fi; fi
 	-for f in .. $(EXTRA_MULTILIB_PARTS); do if [ x$${f} != x.. ]; then \
 	  cp stage4/$${f} . ; \
 	else true; \
diff --git a/gcc/config.gcc b/gcc/config.gcc
index 5b3118b..061c970 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -276,7 +276,7 @@ case $machine in
 	# support are matched above and just set $cpu_type.
 	xm_defines=POSIX
 	tm_file="${cpu_type}/gnu.h"
-	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o"
+	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o"
 	# GNU always uses ELF.
 	elf=yes
 	# GNU tools are the only tools.
@@ -700,7 +700,7 @@ cris-*-elf | cris-*-none)
 cris-*-linux*)
 	tm_file="dbxelf.h elfos.h svr4.h ${tm_file} linux.h cris/linux.h"
 	tmake_file="cris/t-cris t-slibgcc-elf-ver cris/t-linux"
-	extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
+	extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
 	case x${enable_threads} in
 	x | xyes | xpthreads | xposix)
 		thread_file=posix
@@ -750,7 +750,7 @@ hppa*-*-linux* | parisc*-*-linux*)
 	tm_file="${tm_file} dbxelf.h elfos.h svr4.h linux.h pa/pa-linux.h \
 		 pa/pa32-regs.h pa/pa32-linux.h"
 	tmake_file="t-slibgcc-elf-ver t-linux pa/t-linux"
-	extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
+	extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
 	gas=yes gnu_ld=yes
 	if test x$enable_threads = xyes; then
 		thread_file='posix'
@@ -981,7 +981,7 @@ i370-*-linux*)
 	tm_file="dbxelf.h elfos.h svr4.h linux.h i370/linux.h ${tm_file}"
 	tmake_file="t-slibgcc-elf-ver t-linux"
 	# broken_install=yes
-	extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
+	extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
 	# extra_parts="crtbegin.o crtend.o"
 	gnu_ld=yes
 	gas=yes
@@ -1178,7 +1178,7 @@ i[34567]86-*-linux*)	# Intel 80386's running GNU/Linux
 			# aka GNU/Linux C library 6
 	tm_file="${tm_file} i386/att.h dbxelf.h elfos.h svr4.h linux.h i386/linux.h"
 	tmake_file="t-slibgcc-elf-ver t-linux i386/t-crtstuff"
-	extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
+	extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
 	gnu_ld=yes
 	float_format=i386
 	if test x$enable_threads = xyes; then
@@ -1189,7 +1189,7 @@ x86_64-*-linux*)
 	tm_file="i386/biarch64.h i386/i386.h i386/att.h dbxelf.h elfos.h svr4.h linux.h \
 		 i386/x86-64.h i386/linux64.h"
 	tmake_file="t-slibgcc-elf-ver t-linux i386/t-crtstuff"
-	extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
+	extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
 	gnu_ld=yes
 	float_format=i386
 	if test x$enable_threads = xyes; then
@@ -2280,7 +2280,7 @@ mips*-*-linux*)				# Linux MIPS, either endian.
                 ;;
 	esac
 	tmake_file="t-slibgcc-elf-ver t-linux"
-	extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
+	extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
 	gnu_ld=yes
 	gas=yes
 	if test x$enable_threads = xyes; then
@@ -2867,7 +2867,7 @@ rs6000-*-lynxos*)
 s390-*-linux*)
 	tm_file="s390/s390.h dbxelf.h elfos.h svr4.h linux.h s390/linux.h"
 	tmake_file="t-slibgcc-elf-ver t-linux s390/t-linux"
-	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o"
+	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o"
 	if test x$enable_threads = xyes; then
 		thread_file='posix'
 	fi
@@ -2878,7 +2878,7 @@ s390x-*-linux*)
 	md_file=s390/s390.md
 	out_file=s390/s390.c
 	tmake_file="t-slibgcc-elf-ver t-linux s390/t-linux"
-	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o"
+	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o"
 	if test x$enable_threads = xyes; then
 		thread_file='posix'
 	fi
@@ -2982,7 +2982,7 @@ sparc-*-linux*libc1*)	# Sparc's running GNU/Linux, libc5
 sparc-*-linux*)		# Sparc's running GNU/Linux, libc6
 	tm_file="${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h sparc/linux.h"
 	tmake_file="t-slibgcc-elf-ver t-linux"
-	extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
+	extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
 	gnu_ld=yes
 	if test x$enable_threads = xyes; then
 		thread_file='posix'
@@ -3177,7 +3177,7 @@ sparc64-*-elf*)
 sparc64-*-linux*)		# 64-bit Sparc's running GNU/Linux
 	tmake_file="t-slibgcc-elf-ver t-linux sparc/t-linux64"
 	tm_file="sparc/sparc_bi.h ${tm_file} dbxelf.h elfos.h svr4.h sparc/sysv4.h sparc/linux64.h"
-	extra_parts="crtbegin.o crtbeginS.o crtend.o crtendS.o"
+	extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
 	gnu_ld=yes
 	if test x$enable_threads = xyes; then
 		thread_file='posix'
diff --git a/gcc/config.in b/gcc/config.in
index a750775..d1b8068 100644
--- a/gcc/config.in
+++ b/gcc/config.in
@@ -551,6 +551,9 @@
 /* Define if your assembler supports the --gstabs option. */
 #undef HAVE_AS_GSTABS_DEBUG_FLAG
 
+/* Define if your linker supports --eh-frame-hdr option. */
+#undef HAVE_LD_EH_FRAME_HDR
+
 /* Define 0/1 to force the choice for exception handling model. */
 #undef CONFIG_SJLJ_EXCEPTIONS
 
diff --git a/gcc/config/i386/gnu.h b/gcc/config/i386/gnu.h
index 205d576..0214c05 100644
--- a/gcc/config/i386/gnu.h
+++ b/gcc/config/i386/gnu.h
@@ -29,7 +29,8 @@
      %{!static: \
        %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}} \
      %{static:crt0.o%s}} \
-   crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
+   crti.o%s %{static:crtbeginT.o%s}\
+   %{!static:%{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}}"
 
 /* FIXME: Is a Hurd-specific fallback mechanism necessary?  */
 #undef MD_FALLBACK_FRAME_STATE_FOR
diff --git a/gcc/config/ia64/fde-glibc.c b/gcc/config/ia64/fde-glibc.c
index c663f58..83cc93a 100644
--- a/gcc/config/ia64/fde-glibc.c
+++ b/gcc/config/ia64/fde-glibc.c
@@ -110,7 +110,9 @@ _Unwind_IteratePhdrCallback (struct dl_phdr_info *info, size_t size, void *ptr)
       else
         goto found;
     }
-  return 0;
+  /* No need to search for further libraries when we know pc is contained
+     in this library.  */
+  return 1;
 
  found:
   *data->segment_base = seg_base;
diff --git a/gcc/config/ia64/linux.h b/gcc/config/ia64/linux.h
index a25844f..91f2f39 100644
--- a/gcc/config/ia64/linux.h
+++ b/gcc/config/ia64/linux.h
@@ -18,6 +18,15 @@
 #undef ASM_SPEC
 #define ASM_SPEC "-x %{mconstant-gp} %{mauto-pic}"
 
+/* Need to override linux.h STARTFILE_SPEC, since it has crtbeginT.o in.  */
+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC \
+  "%{!shared: \
+     %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
+		       %{!p:%{profile:gcrt1.o%s} \
+			 %{!profile:crt1.o%s}}}} \
+   crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
+
 /* Similar to standard Linux, but adding -ffast-math support.  */
 #undef  ENDFILE_SPEC
 #define ENDFILE_SPEC \
@@ -45,4 +54,10 @@
 #undef PROFILE_BEFORE_PROLOGUE
 #define PROFILE_BEFORE_PROLOGUE 1
 
+/* Override linux.h LINK_EH_SPEC definition.
+   Signalize that because we have fde-glibc, we don't need all C shared libs
+   linked against -lgcc_s.  */
+#undef LINK_EH_SPEC
+#define LINK_EH_SPEC ""
+
 /* End of linux.h */
diff --git a/gcc/config/linux.h b/gcc/config/linux.h
index 4743ffe..6e60c00 100644
--- a/gcc/config/linux.h
+++ b/gcc/config/linux.h
@@ -50,12 +50,22 @@ Boston, MA 02111-1307, USA.  */
    object constructed before entering `main'. */
    
 #undef	STARTFILE_SPEC
+#ifdef USE_GNULIBC_1
 #define STARTFILE_SPEC \
   "%{!shared: \
      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
 		       %{!p:%{profile:gcrt1.o%s} \
 			 %{!profile:crt1.o%s}}}} \
    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
+#else
+#define STARTFILE_SPEC \
+  "%{!shared: \
+     %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
+		       %{!p:%{profile:gcrt1.o%s} \
+			 %{!profile:crt1.o%s}}}} \
+   crti.o%s %{static:crtbeginT.o%s}\
+   %{!static:%{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}}"
+#endif
 
 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
    the GNU/Linux magical crtend.o file (see crtstuff.c) which
@@ -98,5 +108,9 @@ Boston, MA 02111-1307, USA.  */
        %{!p:%{!pg:%{!g*:-lc} %{g*:-lg}}}}"
 #endif
 
+#if !defined(USE_GNULIBC_1) && defined(HAVE_LD_EH_FRAME_HDR)
+#define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
+#endif
+
 /* Define this so we can compile MS code for use with WINE.  */
 #define HANDLE_PRAGMA_PACK_PUSH_POP
diff --git a/gcc/config/sparc/linux.h b/gcc/config/sparc/linux.h
index dff005b..cfc3e52 100644
--- a/gcc/config/sparc/linux.h
+++ b/gcc/config/sparc/linux.h
@@ -44,10 +44,17 @@ Boston, MA 02111-1307, USA.  */
    object constructed before entering `main'.  */
    
 #undef  STARTFILE_SPEC
+#ifdef USE_GNULIBC_1
 #define STARTFILE_SPEC \
   "%{!shared: \
      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
+#else
+  "%{!shared: \
+     %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
+   crti.o%s %{static:crtbeginT.o%s}\
+   %{!static:%{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}}"
+#endif
 
 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
    the GNU/Linux magical crtend.o file (see crtstuff.c) which
@@ -242,4 +249,8 @@ do {									\
 #else
 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 #endif
+
+#if !defined(USE_GNULIBC_1) && defined(HAVE_LD_EH_FRAME_HDR)
+#define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
+#endif
 
diff --git a/gcc/config/sparc/linux64.h b/gcc/config/sparc/linux64.h
index b82b31f..54b672e 100644
--- a/gcc/config/sparc/linux64.h
+++ b/gcc/config/sparc/linux64.h
@@ -59,13 +59,15 @@ Boston, MA 02111-1307, USA.  */
 #define STARTFILE_SPEC32 \
   "%{!shared: \
      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
-   crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
+   crti.o%s %{static:crtbeginT.o%s}\
+   %{!static:%{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}}"
 
 #define STARTFILE_SPEC64 \
   "%{!shared: \
      %{pg:/usr/lib64/gcrt1.o%s} %{!pg:%{p:/usr/lib64/gcrt1.o%s} %{!p:/usr/lib64/crt1.o%s}}}\
-   /usr/lib64/crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
-   
+   /usr/lib64/crti.o%s %{static:crtbeginT.o%s}\
+   %{!static:%{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}}"
+
 #ifdef SPARC_BI_ARCH
 
 #if DEFAULT_ARCH32_P
@@ -367,4 +369,8 @@ do {									\
    RELATIVE relocations.  */
 
 /* #define DWARF_OFFSET_SIZE PTR_SIZE */
+
+#if defined(HAVE_LD_EH_FRAME_HDR)
+#define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
+#endif
 
diff --git a/gcc/config/sparc/t-linux64 b/gcc/config/sparc/t-linux64
index 2a3ec4b..4f552e0 100644
--- a/gcc/config/sparc/t-linux64
+++ b/gcc/config/sparc/t-linux64
@@ -7,4 +7,4 @@ MULTILIB_EXCLUSIONS = m32/!m64/mno-app-regs m32/!m64/mcmodel=medany
 LIBGCC = stmp-multilib
 INSTALL_LIBGCC = install-multilib
 
-EXTRA_MULTILIB_PARTS=crtbegin.o crtend.o crtbeginS.o crtendS.o
+EXTRA_MULTILIB_PARTS=crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o
diff --git a/gcc/config/t-linux b/gcc/config/t-linux
index 06283bd..570135a 100644
--- a/gcc/config/t-linux
+++ b/gcc/config/t-linux
@@ -9,3 +9,8 @@ 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
+LIB2ADDEHDEP = unwind.inc unwind-dw2-fde.h unwind-dw2-fde.c
diff --git a/gcc/config/t-linux-gnulibc1 b/gcc/config/t-linux-gnulibc1
index 7bb7bce..56a4715 100644
--- a/gcc/config/t-linux-gnulibc1
+++ b/gcc/config/t-linux-gnulibc1
@@ -1,2 +1,7 @@
 # We are building for the Linux C library 5.
 T_CFLAGS = -DUSE_GNULIBC_1
+
+# Use unwind-dw2-fde
+LIB2ADDEH = $(srcdir)/unwind-dw2.c $(srcdir)/unwind-dw2-fde.c \
+  $(srcdir)/unwind-sjlj.c
+LIB2ADDEHDEP = unwind.inc unwind-dw2-fde.h
diff --git a/gcc/configure b/gcc/configure
index 3b214f5..39107bc 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -6904,6 +6904,92 @@ else
   echo "$ac_t""$gcc_cv_as" 1>&6
 fi
 
+# Figure out what linker we will be using.
+echo $ac_n "checking what linker to use""... $ac_c" 1>&6
+echo "configure:6904: checking what linker to use" >&5
+gcc_cv_ld=
+gcc_cv_gld_major_version=
+gcc_cv_gld_minor_version=
+gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
+gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
+if test -x "$DEFAULT_LINKER"; then
+	gcc_cv_ld="$DEFAULT_LINKER"
+elif test -x "$LD"; then
+	gcc_cv_ld="$LD"
+elif test -x ld$host_exeext; then
+	# Build using linker in the current directory.
+	gcc_cv_ld=./ld$host_exeext
+elif test -f $gcc_cv_ld_gld_srcdir/configure.in -a -f ../ld/Makefile; then
+	# Single tree build which includes ld.
+	for f in $gcc_cv_ld_bfd_srcdir/configure $gcc_cv_ld_gld_srcdir/configure $gcc_cv_ld_gld_srcdir/configure.in $gcc_cv_ld_gld_srcdir/Makefile.in
+	do
+		gcc_cv_gld_version=`grep '^VERSION=[0-9]*\.[0-9]*' $f`
+		if test x$gcc_cv_gld_version != x; then
+			break
+		fi
+	done
+	gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
+	gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
+fi
+
+if test "x$gcc_cv_ld" = x -a x$host = x$target; then
+	# Native build.
+	# Search the same directories that the installed compiler will
+	# search.  Else we may find the wrong linker and lose.  If we
+	# do not find a suitable linker binary, then try the user's
+	# path.
+	#
+	# Also note we have to check MD_EXEC_PREFIX before checking the
+	# user's path.  Unfortunately, there is no good way to get at the
+	# value of MD_EXEC_PREFIX here.  So we do a brute force search
+	# through all the known MD_EXEC_PREFIX values.  Ugh.  This needs
+	# to be fixed as part of the make/configure rewrite too.
+
+	if test "x$exec_prefix" = xNONE; then
+		if test "x$prefix" = xNONE; then
+			test_prefix=/usr/local
+		else
+			test_prefix=$prefix
+		fi
+	else
+		test_prefix=$exec_prefix
+	fi
+
+	# If the loop below does not find an linker, then use whatever
+	# one we can find in the users's path.
+	# user's path.
+	gcc_cv_ld=ld$host_exeext
+
+	test_dirs="$test_prefix/lib/gcc-lib/$target/$gcc_version \
+		   $test_prefix/lib/gcc-lib/$target \
+		   /usr/lib/gcc/$target/$gcc_version \
+		   /usr/lib/gcc/$target \
+		   $test_prefix/$target/bin/$target/$gcc_version \
+		   $test_prefix/$target/bin \
+		   /usr/libexec \
+		   /usr/ccs/gcc \
+		   /usr/ccs/bin \
+		   /udk/usr/ccs/bin \
+		   /bsd43/usr/lib/cmplrs/cc \
+		   /usr/cross64/usr/bin \
+		   /usr/lib/cmplrs/cc \
+		   /sysv/usr/lib/cmplrs/cc \
+		   /svr4/usr/lib/cmplrs/cc \
+		   /usr/bin"
+
+	for dir in $test_dirs; do
+		if test -f $dir/ld$host_exeext; then
+			gcc_cv_ld=$dir/ld$host_exeext
+			break;
+		fi
+	done
+fi
+if test x$gcc_cv_gld_major_version != x -a x$gcc_cv_gld_minor_version != x; then
+  echo "$ac_t"""newly built ld"" 1>&6
+else
+  echo "$ac_t""$gcc_cv_ld" 1>&6
+fi
+
 # Figure out what nm we will be using.
 echo $ac_n "checking what nm to use""... $ac_c" 1>&6
 echo "configure:6910: checking what nm to use" >&5
@@ -7526,6 +7612,27 @@ EOF
 fi
 echo "$ac_t""$gcc_cv_as_gstabs_flag" 1>&6
 
+echo $ac_n "checking linker PT_GNU_EH_FRAME support""... $ac_c" 1>&6
+echo "configure:7611: checking linker PT_GNU_EH_FRAME support" >&5
+gcc_cv_ld_eh_frame_hdr=no
+if test x$gcc_cv_gld_major_version != x -a x$gcc_cv_gld_minor_version != x; then
+  if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 && grep 'EMUL = elf' ../ld/Makefile > /dev/null; then
+    gcc_cv_ld_eh_frame_hdr=yes
+  fi
+elif test x$gcc_cv_ld != x; then
+	# Check if linker supports --eh-frame-hdr option
+	if $gcc_cv_ld --help 2>/dev/null | grep eh-frame-hdr > /dev/null; then
+		gcc_cv_ld_eh_frame_hdr=yes
+	fi
+fi
+if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
+	cat >> confdefs.h <<\EOF
+#define HAVE_LD_EH_FRAME_HDR 1
+EOF
+
+fi
+echo "$ac_t""$gcc_cv_ld_eh_frame_hdr" 1>&6
+
 if test "$prefix" != "/usr" && test "$prefix" != "/usr/local" ; then
   cat >> confdefs.h <<EOF
 #define PREFIX_INCLUDE_DIR "$prefix/include"
diff --git a/gcc/configure.in b/gcc/configure.in
index 71f463e..34a5b2b 100644
--- a/gcc/configure.in
+++ b/gcc/configure.in
@@ -1257,6 +1257,95 @@ else
   AC_MSG_RESULT($gcc_cv_as)
 fi
 
+# Figure out what linker we will be using.
+AC_MSG_CHECKING(what linker to use)
+gcc_cv_ld=
+gcc_cv_gld_major_version=
+gcc_cv_gld_minor_version=
+gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
+gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
+if test -x "$DEFAULT_LINKER"; then
+	gcc_cv_ld="$DEFAULT_LINKER"
+elif test -x "$LD"; then
+	gcc_cv_ld="$LD"
+elif test -x ld$host_exeext; then
+	# Build using linker in the current directory.
+	gcc_cv_ld=./ld$host_exeext
+elif test -f $gcc_cv_ld_gld_srcdir/configure.in -a -f ../ld/Makefile; then
+	# Single tree build which includes ld.
+	for f in $gcc_cv_ld_bfd_srcdir/configure $gcc_cv_ld_gld_srcdir/configure $gcc_cv_ld_gld_srcdir/configure.in $gcc_cv_ld_gld_srcdir/Makefile.in
+	do
+changequote(,)dnl
+		gcc_cv_gld_version=`grep '^VERSION=[0-9]*\.[0-9]*' $f`
+changequote([,])dnl
+		if test x$gcc_cv_gld_version != x; then
+			break
+		fi
+	done
+changequote(,)dnl
+	gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
+	gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
+changequote([,])dnl
+fi
+
+if test "x$gcc_cv_ld" = x -a x$host = x$target; then
+	# Native build.
+	# Search the same directories that the installed compiler will
+	# search.  Else we may find the wrong linker and lose.  If we
+	# do not find a suitable linker binary, then try the user's
+	# path.
+	#
+	# Also note we have to check MD_EXEC_PREFIX before checking the
+	# user's path.  Unfortunately, there is no good way to get at the
+	# value of MD_EXEC_PREFIX here.  So we do a brute force search
+	# through all the known MD_EXEC_PREFIX values.  Ugh.  This needs
+	# to be fixed as part of the make/configure rewrite too.
+
+	if test "x$exec_prefix" = xNONE; then
+		if test "x$prefix" = xNONE; then
+			test_prefix=/usr/local
+		else
+			test_prefix=$prefix
+		fi
+	else
+		test_prefix=$exec_prefix
+	fi
+
+	# If the loop below does not find an linker, then use whatever
+	# one we can find in the users's path.
+	# user's path.
+	gcc_cv_ld=ld$host_exeext
+
+	test_dirs="$test_prefix/lib/gcc-lib/$target/$gcc_version \
+		   $test_prefix/lib/gcc-lib/$target \
+		   /usr/lib/gcc/$target/$gcc_version \
+		   /usr/lib/gcc/$target \
+		   $test_prefix/$target/bin/$target/$gcc_version \
+		   $test_prefix/$target/bin \
+		   /usr/libexec \
+		   /usr/ccs/gcc \
+		   /usr/ccs/bin \
+		   /udk/usr/ccs/bin \
+		   /bsd43/usr/lib/cmplrs/cc \
+		   /usr/cross64/usr/bin \
+		   /usr/lib/cmplrs/cc \
+		   /sysv/usr/lib/cmplrs/cc \
+		   /svr4/usr/lib/cmplrs/cc \
+		   /usr/bin"
+
+	for dir in $test_dirs; do
+		if test -f $dir/ld$host_exeext; then
+			gcc_cv_ld=$dir/ld$host_exeext
+			break;
+		fi
+	done
+fi
+if test x$gcc_cv_gld_major_version != x -a x$gcc_cv_gld_minor_version != x; then
+  AC_MSG_RESULT("newly built ld")
+else
+  AC_MSG_RESULT($gcc_cv_ld)
+fi
+
 # Figure out what nm we will be using.
 AC_MSG_CHECKING(what nm to use)
 if test -x nm$host_exeext; then
@@ -1533,7 +1622,7 @@ if test x"$gcc_cv_as_shf_merge" = xyes; then
 fi
 AC_MSG_RESULT($gcc_cv_as_shf_merge)
 
-case "$target" in 
+case "$target" in
   sparc*-*-*)
     AC_CACHE_CHECK([assembler .register pseudo-op support],
 	gcc_cv_as_register_pseudo_op, [
@@ -1800,6 +1889,24 @@ if test x"$gcc_cv_as_gstabs_flag" = xyes; then
 fi
 AC_MSG_RESULT($gcc_cv_as_gstabs_flag)
 
+AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
+gcc_cv_ld_eh_frame_hdr=no
+if test x$gcc_cv_gld_major_version != x -a x$gcc_cv_gld_minor_version != x; then
+  if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 && grep 'EMUL = elf' ../ld/Makefile > /dev/null; then
+    gcc_cv_ld_eh_frame_hdr=yes
+  fi
+elif test x$gcc_cv_ld != x; then
+	# Check if linker supports --eh-frame-hdr option
+	if $gcc_cv_ld --help 2>/dev/null | grep eh-frame-hdr > /dev/null; then
+		gcc_cv_ld_eh_frame_hdr=yes
+	fi
+fi
+if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
+	AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
+[Define if your linker supports --eh-frame-hdr option.])
+fi
+AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
+
 if test "$prefix" != "/usr" && test "$prefix" != "/usr/local" ; then
   AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include")
 fi
diff --git a/gcc/crtstuff.c b/gcc/crtstuff.c
index dae5190..8beb64c 100644
--- a/gcc/crtstuff.c
+++ b/gcc/crtstuff.c
@@ -66,6 +66,19 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 # define CRT_CALL_STATIC_FUNCTION(func) func ()
 #endif
 
+#if defined(OBJECT_FORMAT_ELF) && defined(HAVE_LD_EH_FRAME_HDR) \
+    && !defined(CRTSTUFFT_O) \
+    && defined(__GLIBC__) && __GLIBC__ >= 2
+#include <link.h>
+# if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) \
+     || (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && defined(DT_CONFIG)))
+#  define USE_PT_GNU_EH_FRAME
+# endif
+#endif
+#if defined(EH_FRAME_SECTION_NAME) && !defined(USE_PT_GNU_EH_FRAME)
+# define USE_EH_FRAME_REGISTRY
+#endif
+
 /* We do not want to add the weak attribute to the declarations of these
    routines in unwind-dw2-fde.h because that will cause the definition of
    these symbols to be weak as well.
@@ -245,7 +258,7 @@ __do_global_dtors_aux (void)
       f ();
     }
 
-#ifdef EH_FRAME_SECTION_NAME
+#ifdef USE_EH_FRAME_REGISTRY
 #if defined(CRT_GET_RFIB_TEXT) || defined(CRT_GET_RFIB_DATA)
   /* If we used the new __register_frame_info_bases interface,
      make sure that we deregister from the same place.  */
@@ -274,7 +287,7 @@ fini_dummy (void)
   asm (TEXT_SECTION_ASM_OP);
 }
 
-#if defined(EH_FRAME_SECTION_NAME) || defined(JCR_SECTION_NAME)
+#if defined(USE_EH_FRAME_REGISTRY) || defined(JCR_SECTION_NAME)
 /* Stick a call to __register_frame_info into the .init section.  For some
    reason calls with no arguments work more reliably in .init, so stick the
    call in another function.  */
@@ -282,7 +295,7 @@ fini_dummy (void)
 static void
 frame_dummy (void)
 {
-#ifdef EH_FRAME_SECTION_NAME
+#ifdef USE_EH_FRAME_REGISTRY
   static struct object object;
 #if defined(CRT_GET_RFIB_TEXT) || defined(CRT_GET_RFIB_DATA)
   void *tbase, *dbase;
@@ -386,13 +399,13 @@ __do_global_dtors (void)
   for (p = __DTOR_LIST__ + 1; (f = *p); p++)
     f ();
 
-#ifdef EH_FRAME_SECTION_NAME
+#ifdef USE_EH_FRAME_REGISTRY
   if (__deregister_frame_info)
     __deregister_frame_info (__EH_FRAME_BEGIN__);
 #endif
 }
 
-#if defined(EH_FRAME_SECTION_NAME) || defined(JCR_SECTION_NAME)
+#if defined(USE_EH_FRAME_REGISTRY) || defined(JCR_SECTION_NAME)
 /* A helper function for __do_global_ctors, which is in crtend.o.  Here
    in crtbegin.o, we can reference a couple of symbols not visible there.
    Plus, since we're before libgcc.a, we have no problems referencing
@@ -400,7 +413,7 @@ __do_global_dtors (void)
 void
 __do_global_ctors_1(void)
 {
-#ifdef EH_FRAME_SECTION_NAME
+#ifdef USE_EH_FRAME_REGISTRY
   static struct object object;
   if (__register_frame_info)
     __register_frame_info (__EH_FRAME_BEGIN__, &object);
@@ -547,7 +560,7 @@ void
 __do_global_ctors (void)
 {
   func_ptr *p;
-#if defined(EH_FRAME_SECTION_NAME) || defined(JCR_SECTION_NAME)
+#if defined(USE_EH_FRAME_REGISTRY) || defined(JCR_SECTION_NAME)
   __do_global_ctors_1();
 #endif
   for (p = __CTOR_END__ - 1; *p != (func_ptr) -1; p--)
diff --git a/gcc/gcc.c b/gcc/gcc.c
index 1e150c8..466f6cd 100644
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -323,7 +323,7 @@ static void clear_args			PARAMS ((void));
 static void fatal_error			PARAMS ((int));
 #ifdef ENABLE_SHARED_LIBGCC
 static void init_gcc_specs              PARAMS ((struct obstack *,
-						 const char *,
+						 const char *, const char *,
 						 const char *));
 #endif
 #if defined(HAVE_TARGET_OBJECT_SUFFIX) || defined(HAVE_TARGET_EXECUTABLE_SUFFIX)
@@ -1416,28 +1416,36 @@ static struct spec_list *specs = (struct spec_list *) 0;
 
 #ifdef ENABLE_SHARED_LIBGCC
 static void
-init_gcc_specs (obstack, shared_name, static_name)
+init_gcc_specs (obstack, shared_name, static_name, eh_name)
      struct obstack *obstack;
      const char *shared_name;
      const char *static_name;
+     const char *eh_name;
 {
   char buffer[128];
+  const char *p;
 
   /* If we see -shared-libgcc, then use the shared version.  */
   sprintf (buffer, "%%{shared-libgcc:%s %s}", shared_name, static_name);
   obstack_grow (obstack, buffer, strlen (buffer));
   /* If we see -static-libgcc, then use the static version.  */
-  sprintf (buffer, "%%{static-libgcc:%s}", static_name);
+  sprintf (buffer, "%%{static-libgcc:%s %s}", static_name, eh_name);
   obstack_grow (obstack, buffer, strlen (buffer));
-  /* Otherwise, if we see -shared, then use the shared version.  */
-  sprintf (buffer,
-	   "%%{!shared-libgcc:%%{!static-libgcc:%%{shared:%s %s}}}", 
-	   shared_name, static_name);
+  /* Otherwise, if we see -shared, then use the shared version
+     if using EH registration routines or static version without
+     exception handling routines otherwise.  */
+  p = "%{!shared-libgcc:%{!static-libgcc:%{shared:";
+  obstack_grow (obstack, p, strlen (p));
+#ifdef LINK_EH_SPEC
+  sprintf (buffer, "%s}}}", static_name);
+#else
+  sprintf (buffer, "%s %s}}}", shared_name, static_name);
+#endif
   obstack_grow (obstack, buffer, strlen (buffer));
   /* Otherwise, use the static version.  */
   sprintf (buffer, 
-	   "%%{!shared-libgcc:%%{!static-libgcc:%%{!shared:%s}}}", 
-	   static_name);
+	   "%%{!shared-libgcc:%%{!static-libgcc:%%{!shared:%s %s}}}", 
+	   static_name, eh_name);
   obstack_grow (obstack, buffer, strlen (buffer));
 }
 #endif /* ENABLE_SHARED_LIBGCC */
@@ -1525,7 +1533,8 @@ init_spec ()
 			    "-lgcc_s%M"
 #endif
 			    ,
-			    "-lgcc");
+			    "-lgcc",
+			    "-lgcc_eh");
 	    p += 5;
 	    in_sep = 0;
 	  }
@@ -1540,7 +1549,8 @@ init_spec ()
 			    "-lgcc_s%M"
 #endif
 			    ,
-			    "libgcc.a%s");
+			    "libgcc.a%s",
+			    "libgcc_eh.a%s");
 	    p += 10;
 	    in_sep = 0;
 	  }
@@ -1565,6 +1575,12 @@ init_spec ()
     asm_spec = obstack_finish (&obstack);
   }
 #endif
+#ifdef LINK_EH_SPEC
+  /* Prepend LINK_EH_SPEC to whatever link_spec we had before.  */
+  obstack_grow (&obstack, LINK_EH_SPEC, sizeof(LINK_EH_SPEC) - 1);
+  obstack_grow0 (&obstack, link_spec, strlen (link_spec));
+  link_spec = obstack_finish (&obstack);
+#endif
 
   specs = sl;
 }
diff --git a/gcc/mklibgcc.in b/gcc/mklibgcc.in
index de63349..8f9174a 100644
--- a/gcc/mklibgcc.in
+++ b/gcc/mklibgcc.in
@@ -97,6 +97,7 @@ done
 
 libgcc2_objs=""
 libgcc2_st_objs=""
+libgcc2_eh_objs=""
 
 for name in $LIB2FUNCS; do
   for ml in $MULTILIBS; do
@@ -200,7 +201,11 @@ for file in $LIB2ADDEH; do
     echo $out: stmp-dirs $file
     echo "	$gcc_compile" $flags -fexceptions -c $file -o $out
   done
-  libgcc2_objs="$libgcc2_objs ${oname}${objext}"
+  if [ "$SHLIB_LINK" ]; then
+    libgcc2_eh_objs="$libgcc2_eh_objs ${oname}${objext}"
+  else
+    libgcc2_objs="$libgcc2_objs ${oname}${objext}"
+  fi
 done
 
 for file in $LIB2ADD_ST; do
@@ -228,13 +233,18 @@ for ml in $MULTILIBS; do
   flags=`echo ${ml} | sed -e 's/^[^;]*;//' -e 's/@/ -/g'`;
 
   libgcc_objs=""
+  libgcc_eh_objs=""
   for o in $libgcc1_objs; do
     libgcc_objs="$libgcc_objs libgcc/${dir}/$o"
   done
   for o in $libgcc2_objs; do
     libgcc_objs="$libgcc_objs libgcc/${dir}/$o"
   done
-  shlib_deps="$libgcc_objs"
+  for o in $libgcc2_eh_objs; do
+    libgcc_eh_objs="$libgcc_eh_objs libgcc/${dir}/$o"
+  done
+  libgcc_sh_objs="$libgcc_objs $libgcc_eh_objs"
+  shlib_deps="$libgcc_sh_objs"
 
   libgcc_st_objs=""
   for o in $libgcc2_st_objs; do
@@ -244,8 +254,8 @@ for ml in $MULTILIBS; do
   if [ "$SHLIB_LINK" -a "$SHLIB_MKMAP" -a -z "$mapfile" ]; then
     mapfile="libgcc.map"
     echo ""
-    echo "${mapfile}: $SHLIB_MKMAP $SHLIB_MAPFILES $libgcc_objs"
-    echo '	{ $(NM_FOR_TARGET)'" $SHLIB_NM_FLAGS $libgcc_objs; echo %%; cat $SHLIB_MAPFILES; } | "'$(AWK)'" -f $SHLIB_MKMAP > "'tmp-$@'
+    echo "${mapfile}: $SHLIB_MKMAP $SHLIB_MAPFILES $libgcc_sh_objs"
+    echo '	{ $(NM_FOR_TARGET)'" $SHLIB_NM_FLAGS $libgcc_sh_objs; echo %%; cat $SHLIB_MAPFILES; } | "'$(AWK)'" -f $SHLIB_MKMAP > "'tmp-$@'
     echo '	mv tmp-$@ $@'
   fi
   shlib_deps="$shlib_deps $mapfile"
@@ -265,6 +275,15 @@ for ml in $MULTILIBS; do
   echo '	else true; fi;'
 
   if [ "$SHLIB_LINK" ]; then
+
+    echo ""
+    echo "${dir}/libgcc_eh.a: $libgcc_eh_objs"
+    echo "	-rm -rf ${dir}/libgcc_eh.a"
+    echo '	$(AR_CREATE_FOR_TARGET)' ${dir}/libgcc_eh.a $libgcc_eh_objs
+    echo '	if $(RANLIB_TEST_FOR_TARGET) ; then' \\
+    echo '	  $(RANLIB_FOR_TARGET)' ${dir}/libgcc_eh.a ';' \\
+    echo '	else true; fi;'
+
     if [ -z "$SHLIB_MULTILIB" ]; then
       if [ "$dir" = "." ]; then
 	shlib_base_name="libgcc_s";
@@ -276,7 +295,7 @@ for ml in $MULTILIBS; do
       echo "	$SHLIB_LINK" \
 	 | sed -e "s%@multilib_flags@%$flags%g" \
 	       -e "s%@multilib_dir@%$dir%g" \
-	       -e "s%@shlib_objs@%$libgcc_objs%g" \
+	       -e "s%@shlib_objs@%$libgcc_sh_objs%g" \
 	       -e "s%@shlib_base_name@%$shlib_base_name%g" \
 	       -e "s%@shlib_map_file@%$mapfile%g"
     elif [ "$SHLIB_MULTILIB" = "$dir" ]; then
@@ -286,7 +305,7 @@ for ml in $MULTILIBS; do
       echo "	$SHLIB_LINK" \
 	 | sed -e "s%@multilib_flags@%$flags%g" \
 	       -e "s%@multilib_dir@%$dir%g" \
-	       -e "s%@shlib_objs@%$libgcc_objs%g" \
+	       -e "s%@shlib_objs@%$libgcc_sh_objs%g" \
 	       -e "s%@shlib_base_name@%$shlib_base_name%g" \
 	       -e "s%@shlib_map_file@%$mapfile%g"
     fi
@@ -320,6 +339,7 @@ for ml in $MULTILIBS; do
   fi
   all="$all ${dir}/libgcc.a"
   if [ "$SHLIB_LINK" ]; then
+    all="$all ${dir}/libgcc_eh.a"
     if [ -z "$SHLIB_MULTILIB" ]; then
       if [ "$dir" = "." ]; then
 	suff="";
@@ -379,6 +399,9 @@ for ml in $MULTILIBS; do
   echo '	$(RANLIB_FOR_TARGET)' ${ldir}/libgcc.a
 
   if [ "$SHLIB_LINK" ]; then
+    echo '	$(INSTALL_DATA)' ${dir}/libgcc_eh.a ${ldir}/
+    echo '	$(RANLIB_FOR_TARGET)' ${ldir}/libgcc_eh.a
+
     if [ -z "$SHLIB_MULTILIB" ]; then
       if [ "$dir" = "." ]; then
 	shlib_base_name="libgcc_s";
diff --git a/gcc/unwind-dw2-fde-glibc.c b/gcc/unwind-dw2-fde-glibc.c
new file mode 100644
index 0000000..c579861
--- /dev/null
+++ b/gcc/unwind-dw2-fde-glibc.c
@@ -0,0 +1,291 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+   Contributed by Jakub Jelinek <jakub@redhat.com>.
+
+   This file is part of GNU CC.
+
+   GNU CC 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.
+
+   GNU CC 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 GNU CC; see the file COPYING.  If not, write to
+   the Free Software Foundation, 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* As a special exception, if you link this library with other files,
+   some of which are compiled with GCC, to produce an executable,
+   this library does not by itself cause the resulting executable
+   to be covered by the GNU General Public License.
+   This exception does not however invalidate any other reasons why
+   the executable file might be covered by the GNU General Public License.  */
+
+/* Locate the FDE entry for a given address, using PT_GNU_EH_FRAME ELF
+   segment and dl_iterate_phdr to avoid register/deregister calls at
+   DSO load/unload.  */
+
+#include "auto-host.h" /* For HAVE_LD_EH_FRAME_HDR.  */
+#include "tconfig.h"
+#include <stddef.h>
+#include <stdlib.h>
+#include <link.h>
+#include "tsystem.h"
+#include "dwarf2.h"
+#include "unwind.h"
+#define NO_BASE_OF_ENCODED_VALUE
+#include "unwind-pe.h"
+#include "unwind-dw2-fde.h"
+#include "gthr.h"
+
+#if defined(HAVE_LD_EH_FRAME_HDR) \
+    && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) \
+	|| (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && defined(DT_CONFIG)))
+
+static fde * _Unwind_Find_registered_FDE (void *pc, struct dwarf_eh_bases *bases);
+
+#define _Unwind_Find_FDE _Unwind_Find_registered_FDE
+#include "unwind-dw2-fde.c"
+#undef _Unwind_Find_FDE
+
+#ifndef PT_GNU_EH_FRAME
+#define PT_GNU_EH_FRAME (PT_LOOS + 0x474e550)
+#endif
+
+struct unw_eh_callback_data
+{
+  _Unwind_Ptr pc;
+  void *tbase;
+  void *dbase;
+  void *func;
+  fde *ret;
+};
+
+struct unw_eh_frame_hdr
+{
+  unsigned char version;
+  unsigned char eh_frame_ptr_enc;
+  unsigned char fde_count_enc;
+  unsigned char table_enc;
+};
+
+/* Like base_of_encoded_value, but take the base from a struct object
+   instead of an _Unwind_Context.  */
+   
+static _Unwind_Ptr
+base_from_cb_data (unsigned char encoding, struct unw_eh_callback_data *data)
+{
+  if (encoding == DW_EH_PE_omit)
+    return 0;
+
+  switch (encoding & 0x70)
+    {
+    case DW_EH_PE_absptr:
+    case DW_EH_PE_pcrel:
+    case DW_EH_PE_aligned:
+      return 0;
+                                 
+    case DW_EH_PE_textrel:
+      return (_Unwind_Ptr) data->tbase;
+    case DW_EH_PE_datarel:
+      return (_Unwind_Ptr) data->dbase;
+    }
+  abort ();
+}
+
+static int
+_Unwind_IteratePhdrCallback (struct dl_phdr_info *info, size_t size, void *ptr)
+{
+  struct unw_eh_callback_data *data = (struct unw_eh_callback_data *) ptr;
+  const ElfW(Phdr) *phdr, *p_eh_frame_hdr, *p_dynamic;
+  long n, match;
+  _Unwind_Ptr load_base;
+  const unsigned char *p;
+  const struct unw_eh_frame_hdr *hdr;
+  _Unwind_Ptr eh_frame;
+  struct object ob;
+
+  /* Make sure struct dl_phdr_info is at least as big as we need.  */
+  if (size < offsetof (struct dl_phdr_info, dlpi_phnum)
+	     + sizeof (info->dlpi_phnum))
+    return -1;
+
+  match = 0;
+  phdr = info->dlpi_phdr;
+  load_base = info->dlpi_addr;
+  p_eh_frame_hdr = NULL;
+  p_dynamic = NULL;
+
+  /* See if PC falls into one of the loaded segments.  Find the eh_frame
+     segment at the same time.  */
+  for (n = info->dlpi_phnum; --n >= 0; phdr++)
+    {
+      if (phdr->p_type == PT_LOAD)
+	{
+	  _Unwind_Ptr vaddr = phdr->p_vaddr + load_base;
+	  if (data->pc >= vaddr && data->pc < vaddr + phdr->p_memsz)
+	    match = 1;
+	}
+      else if (phdr->p_type == PT_GNU_EH_FRAME)
+	p_eh_frame_hdr = phdr;
+      else if (phdr->p_type == PT_DYNAMIC)
+	p_dynamic = phdr;
+    }
+  if (!match || !p_eh_frame_hdr)
+    return 0;
+
+  /* Read .eh_frame_hdr header.  */
+  hdr = (const struct unw_eh_frame_hdr *)
+	(p_eh_frame_hdr->p_vaddr + load_base);
+  if (hdr->version != 1)
+    return 1;
+
+#ifdef CRT_GET_RFIB_DATA
+# ifdef __i386__
+  data->dbase = NULL;
+  if (p_dynamic)
+    {
+      /* For dynamicly linked executables and shared libraries,
+	 DT_PLTGOT is the gp value for that object.  */
+      ElfW(Dyn) *dyn = (ElfW(Dyn) *)(p_dynamic->p_vaddr + load_base);
+      for (; dyn->d_tag != DT_NULL ; dyn++)
+	if (dyn->d_tag == DT_PLTGOT)
+	  {
+	    /* On IA-32, _DYNAMIC is writable and GLIBC has relocated it.  */
+	    data->dbase = (void *) dyn->d_un.d_ptr;
+	    break;
+	  }
+    }
+# else
+#  error What is DW_EH_PE_datarel base on this platform?
+# endif
+#endif
+#ifdef CRT_GET_RFIB_TEXT
+# error What is DW_EH_PE_textrel base on this platform?
+#endif
+
+  p = read_encoded_value_with_base (hdr->eh_frame_ptr_enc,
+				    base_from_cb_data (hdr->eh_frame_ptr_enc,
+						       data),
+				    (const unsigned char *) (hdr + 1),
+				    &eh_frame);
+
+  /* We require here specific table encoding to speed things up.
+     Also, DW_EH_PE_datarel here means using PT_GNU_EH_FRAME start
+     as base, not the processor specific DW_EH_PE_datarel.  */
+  if (hdr->fde_count_enc != DW_EH_PE_omit
+      && hdr->table_enc == (DW_EH_PE_datarel | DW_EH_PE_sdata4))
+    {
+      _Unwind_Ptr fde_count;
+
+      p = read_encoded_value_with_base (hdr->fde_count_enc,
+					base_from_cb_data (hdr->fde_count_enc,
+							   data),
+					p, &fde_count);
+      /* Shouldn't happen.  */
+      if (fde_count == 0)
+	return 1;
+      if ((((_Unwind_Ptr) p) & 3) == 0)
+	{
+	  struct fde_table {
+	    signed initial_loc __attribute__ ((mode (SI)));
+	    signed fde __attribute__ ((mode (SI)));
+	  };
+	  const struct fde_table *table = (const struct fde_table *) p;
+	  size_t lo, hi, mid;
+	  _Unwind_Ptr data_base = (_Unwind_Ptr) hdr;
+	  fde *f;
+	  unsigned int f_enc, f_enc_size;
+	  _Unwind_Ptr range;
+
+	  mid = fde_count - 1;
+	  if (data->pc < table[0].initial_loc + data_base)
+	    return 1;
+	  else if (data->pc < table[mid].initial_loc + data_base)
+	    {
+	      lo = 0;
+	      hi = mid;
+
+	      while (lo < hi)
+		{
+		  mid = (lo + hi) / 2;
+		  if (data->pc < table[mid].initial_loc + data_base)
+		    hi = mid;
+		  else if (data->pc >= table[mid + 1].initial_loc + data_base)
+		    lo = mid + 1;
+		  else
+		    break;
+		}
+
+	      if (lo >= hi)
+		__gxx_abort ();
+	    }
+
+	  f = (fde *) (table[mid].fde + data_base);
+	  f_enc = get_fde_encoding (f);
+	  f_enc_size = size_of_encoded_value (f_enc);
+	  read_encoded_value_with_base (f_enc & 0x0f, 0,
+					&f->pc_begin[f_enc_size], &range);
+	  if (data->pc < table[mid].initial_loc + data_base + range)
+	    data->ret = f;
+	  data->func = (void *) (table[mid].initial_loc + data_base);
+	  return 1;
+	}
+    }
+
+  /* We have no sorted search table, so need to go the slow way.
+     As soon as GLIBC will provide API so to notify that a library has been
+     removed, we could cache this (and thus use search_object).  */
+  ob.pc_begin = NULL;
+  ob.tbase = data->tbase;
+  ob.dbase = data->dbase;
+  ob.u.single = (fde *) eh_frame;
+  ob.s.i = 0;
+  ob.s.b.mixed_encoding = 1;  /* Need to assume worst case.  */
+  data->ret = linear_search_fdes (&ob, (fde *) eh_frame, (void *) data->pc);
+  if (data->ret != NULL)
+    {
+      unsigned int encoding = get_fde_encoding (data->ret);
+      read_encoded_value_with_base (encoding,
+				    base_from_cb_data (encoding, data),
+				    data->ret->pc_begin,
+				    (_Unwind_Ptr *)&data->func);
+    }
+  return 1;
+}
+
+fde *
+_Unwind_Find_FDE (void *pc, struct dwarf_eh_bases *bases)
+{
+  struct unw_eh_callback_data data;
+  fde *ret;
+
+  ret = _Unwind_Find_registered_FDE (pc, bases);
+  if (ret != NULL)
+    return ret;
+
+  data.pc = (_Unwind_Ptr) pc;
+  data.tbase = NULL;
+  data.dbase = NULL;
+  data.func = NULL;
+  data.ret = NULL;
+
+  if (dl_iterate_phdr (_Unwind_IteratePhdrCallback, &data) < 0)
+    return NULL;
+
+  if (data.ret)
+    {
+      bases->tbase = data.tbase;
+      bases->dbase = data.dbase;
+      bases->func = data.func;
+    }
+  return data.ret;
+}
+
+#else
+#include "unwind-dw2-fde.c"
+#endif
diff --git a/gcc/unwind-dw2-fde.c b/gcc/unwind-dw2-fde.c
index d87cac5..29d84ce 100644
--- a/gcc/unwind-dw2-fde.c
+++ b/gcc/unwind-dw2-fde.c
@@ -28,6 +28,7 @@ along with GCC; see the file COPYING.  If not, write to the Free
 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 02111-1307, USA.  */
 
+#ifndef _Unwind_Find_FDE
 #include "tconfig.h"
 #include "tsystem.h"
 #include "dwarf2.h"
@@ -36,6 +37,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #include "unwind-pe.h"
 #include "unwind-dw2-fde.h"
 #include "gthr.h"
+#endif
 
 /* The unseen_objects list contains objects that have been registered
    but not yet categorized in any way.  The seen_objects list has had