1 files changed, 47 insertions, 14 deletions

diff --git a/nptl/sysdeps/pthread/unwind-forcedunwind.c b/nptl/sysdeps/pthread/unwind-forcedunwind.c
index 6792d719d3..402591f6e4 100644
--- a/nptl/sysdeps/pthread/unwind-forcedunwind.c
+++ b/nptl/sysdeps/pthread/unwind-forcedunwind.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003, 2005, 2006 Free Software Foundation, Inc.
+/* Copyright (C) 2003, 2005, 2006, 2009 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Jakub Jelinek <jakub@redhat.com>.
 
@@ -21,7 +21,9 @@
 #include <stdio.h>
 #include <unwind.h>
 #include <pthreadP.h>
+#include <sysdep.h>
 
+static void *libgcc_s_handle;
 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 *,
@@ -34,10 +36,13 @@ void
 __attribute_noinline__
 pthread_cancel_init (void)
 {
-  void *resume, *personality, *forcedunwind, *getcfa;
+  void *resume;
+  void *personality;
+  void *forcedunwind;
+  void *getcfa;
   void *handle;
 
-  if (__builtin_expect (libgcc_s_getcfa != NULL, 1))
+  if (__builtin_expect (libgcc_s_handle != NULL, 1))
     {
       /* Force gcc to reload all values.  */
       asm volatile ("" ::: "memory");
@@ -58,23 +63,42 @@ pthread_cancel_init (void)
       )
     __libc_fatal ("libgcc_s.so.1 must be installed for pthread_cancel to work\n");
 
+  PTR_MANGLE (resume);
   libgcc_s_resume = resume;
+  PTR_MANGLE (personality);
   libgcc_s_personality = personality;
+  PTR_MANGLE (forcedunwind);
   libgcc_s_forcedunwind = forcedunwind;
-  /* Make sure libgcc_s_getcfa is written last.  Otherwise,
+  PTR_MANGLE (getcfa);
+  libgcc_s_getcfa = getcfa;
+  /* Make sure libgcc_s_handle is written last.  Otherwise,
      pthread_cancel_init might return early even when the pointer the
      caller is interested in is not initialized yet.  */
   atomic_write_barrier ();
-  libgcc_s_getcfa = getcfa;
+  libgcc_s_handle = handle;
+}
+
+void
+__libc_freeres_fn_section
+__unwind_freeres (void)
+{
+  void *handle = libgcc_s_handle;
+  if (handle != NULL)
+    {
+      libgcc_s_handle = NULL;
+      __libc_dlclose (handle);
+    }
 }
 
 void
 _Unwind_Resume (struct _Unwind_Exception *exc)
 {
-  if (__builtin_expect (libgcc_s_resume == NULL, 0))
+  if (__builtin_expect (libgcc_s_handle == NULL, 0))
     pthread_cancel_init ();
 
-  libgcc_s_resume (exc);
+  void (*resume) (struct _Unwind_Exception *exc) = libgcc_s_resume;
+  PTR_DEMANGLE (resume);
+  resume (exc);
 }
 
 _Unwind_Reason_Code
@@ -83,28 +107,37 @@ __gcc_personality_v0 (int version, _Unwind_Action actions,
                       struct _Unwind_Exception *ue_header,
                       struct _Unwind_Context *context)
 {
-  if (__builtin_expect (libgcc_s_personality == NULL, 0))
+  if (__builtin_expect (libgcc_s_handle == NULL, 0))
     pthread_cancel_init ();
 
-  return libgcc_s_personality (version, actions, exception_class,
-			       ue_header, context);
+  _Unwind_Reason_Code (*personality)
+    (int, _Unwind_Action, _Unwind_Exception_Class, struct _Unwind_Exception *,
+     struct _Unwind_Context *) = libgcc_s_personality;
+  PTR_DEMANGLE (personality);
+  return personality (version, actions, exception_class, ue_header, context);
 }
 
 _Unwind_Reason_Code
 _Unwind_ForcedUnwind (struct _Unwind_Exception *exc, _Unwind_Stop_Fn stop,
 		      void *stop_argument)
 {
-  if (__builtin_expect (libgcc_s_forcedunwind == NULL, 0))
+  if (__builtin_expect (libgcc_s_handle == NULL, 0))
     pthread_cancel_init ();
 
-  return libgcc_s_forcedunwind (exc, stop, stop_argument);
+  _Unwind_Reason_Code (*forcedunwind)
+    (struct _Unwind_Exception *, _Unwind_Stop_Fn, void *)
+    = libgcc_s_forcedunwind;
+  PTR_DEMANGLE (forcedunwind);
+  return forcedunwind (exc, stop, stop_argument);
 }
 
 _Unwind_Word
 _Unwind_GetCFA (struct _Unwind_Context *context)
 {
-  if (__builtin_expect (libgcc_s_getcfa == NULL, 0))
+  if (__builtin_expect (libgcc_s_handle == NULL, 0))
     pthread_cancel_init ();
 
-  return libgcc_s_getcfa (context);
+  _Unwind_Word (*getcfa) (struct _Unwind_Context *) = libgcc_s_getcfa;
+  PTR_DEMANGLE (getcfa);
+  return getcfa (context);
 }