Unwind resume support

---
 Makefile           |   12 +++++++++
 rt-unwind-resume.c |    1 
 unwind-resume.c    |   64 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 77 insertions(+)

Index: glibc/sysdeps/mach/hurd/rt-unwind-resume.c
===================================================================
RCS file: glibc/sysdeps/mach/hurd/rt-unwind-resume.c
diff -N glibc/sysdeps/mach/hurd/rt-unwind-resume.c
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ glibc/sysdeps/mach/hurd/rt-unwind-resume.c	30 Jul 2009 00:21:33 -0000
@@ -0,0 +1 @@
+#include <unwind-resume.c>
Index: glibc/sysdeps/mach/hurd/unwind-resume.c
===================================================================
RCS file: glibc/sysdeps/mach/hurd/unwind-resume.c
diff -N glibc/sysdeps/mach/hurd/unwind-resume.c
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ glibc/sysdeps/mach/hurd/unwind-resume.c	30 Jul 2009 00:21:33 -0000
@@ -0,0 +1,64 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <dlfcn.h>
+#include <stdio.h>
+#include <unwind.h>
+
+static void (*libgcc_s_resume) (struct _Unwind_Exception *exc);
+static _Unwind_Reason_Code (*libgcc_s_personality)
+  (int, _Unwind_Action, _Unwind_Exception_Class, struct _Unwind_Exception *,
+   struct _Unwind_Context *);
+
+static void
+init (void)
+{
+  void *resume, *personality;
+  void *handle;
+
+  handle = __libc_dlopen ("libgcc_s.so.1");
+
+  if (handle == NULL
+      || (resume = __libc_dlsym (handle, "_Unwind_Resume")) == NULL
+      || (personality = __libc_dlsym (handle, "__gcc_personality_v0")) == NULL)
+    __libc_fatal ("libgcc_s.so.1 must be installed for pthread_cancel to work\n");
+
+  libgcc_s_resume = resume;
+  libgcc_s_personality = personality;
+}
+
+void
+_Unwind_Resume (struct _Unwind_Exception *exc)
+{
+  if (__builtin_expect (libgcc_s_resume == NULL, 0))
+    init ();
+  libgcc_s_resume (exc);
+}
+
+_Unwind_Reason_Code
+__gcc_personality_v0 (int version, _Unwind_Action actions,
+		      _Unwind_Exception_Class exception_class,
+                      struct _Unwind_Exception *ue_header,
+                      struct _Unwind_Context *context)
+{
+  if (__builtin_expect (libgcc_s_personality == NULL, 0))
+    init ();
+  return libgcc_s_personality (version, actions, exception_class,
+			       ue_header, context);
+}
Index: glibc/sysdeps/mach/hurd/Makefile
===================================================================
RCS file: /cvs/glibc/libc/sysdeps/mach/hurd/Makefile,v
retrieving revision 1.96
diff -u -p -r1.96 Makefile
--- glibc/sysdeps/mach/hurd/Makefile	7 Jan 2009 01:59:31 -0000	1.96
+++ glibc/sysdeps/mach/hurd/Makefile	30 Jul 2009 00:21:33 -0000
@@ -211,4 +211,16 @@ ifeq ($(subdir),sunrpc)
 		  net/route.h
 endif
 
+ifeq ($(subdir),csu)
+routines += unwind-resume
+shared-only-routines += unwind-resume
+CFLAGS-unwind-resume.c += -fexceptions -fasynchronous-unwind-tables
+endif
+
+ifeq ($(subdir),rt)
+librt-sysdep_routines += rt-unwind-resume
+librt-shared-only-routines += rt-unwind-resume
+CFLAGS-rt-unwind-resume.c += -fexceptions -fasynchronous-unwind-tables
+endif
+
 endif	# in-Makerules