From 3142b1ac55b1a807b196844f8f4ec6a9c1f5a0a5 Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Mon, 8 May 2006 01:01:08 +0000
Subject: [BZ #2644]

2006-05-07  Ulrich Drepper  <drepper@redhat.com>
	* sysdeps/unix/sysv/linux/ia64/unwind-forcedunwind.c: Make sure
	functions pointer is reloaded after pthread_cancel_init calls.

	[BZ #2644]
	* sysdeps/pthread/unwind-forcedunwind.c: Make sure functions
	pointers are reloaded after pthread_cancel_init calls.
---
 nptl/sysdeps/pthread/unwind-forcedunwind.c         | 34 ++++++++++++++++------
 .../unix/sysv/linux/ia64/unwind-forcedunwind.c     |  8 +++--
 2 files changed, 31 insertions(+), 11 deletions(-)

(limited to 'nptl/sysdeps')

diff --git a/nptl/sysdeps/pthread/unwind-forcedunwind.c b/nptl/sysdeps/pthread/unwind-forcedunwind.c
index 9a38704..47f67bc 100644
--- a/nptl/sysdeps/pthread/unwind-forcedunwind.c
+++ b/nptl/sysdeps/pthread/unwind-forcedunwind.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003, 2005 Free Software Foundation, Inc.
+/* Copyright (C) 2003, 2005, 2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Jakub Jelinek <jakub@redhat.com>.
 
@@ -22,13 +22,13 @@
 #include <unwind.h>
 #include <pthreadP.h>
 
-static void (*libgcc_s_resume) (struct _Unwind_Exception *exc);
-static _Unwind_Reason_Code (*libgcc_s_personality)
+static void (*volatile libgcc_s_resume) (struct _Unwind_Exception *exc);
+static _Unwind_Reason_Code (*volatile libgcc_s_personality)
   (int, _Unwind_Action, _Unwind_Exception_Class, struct _Unwind_Exception *,
    struct _Unwind_Context *);
-static _Unwind_Reason_Code (*libgcc_s_forcedunwind)
+static _Unwind_Reason_Code (*volatile libgcc_s_forcedunwind)
   (struct _Unwind_Exception *, _Unwind_Stop_Fn, void *);
-static _Unwind_Word (*libgcc_s_getcfa) (struct _Unwind_Context *);
+static _Unwind_Word (*volatile libgcc_s_getcfa) (struct _Unwind_Context *);
 
 void
 pthread_cancel_init (void)
@@ -67,7 +67,11 @@ void
 _Unwind_Resume (struct _Unwind_Exception *exc)
 {
   if (__builtin_expect (libgcc_s_resume == NULL, 0))
-    pthread_cancel_init ();
+    {
+      pthread_cancel_init ();
+      /* The function pointer has changed, ensure we reload it.  */
+      asm volatile ("" : "+m" (libgcc_s_resume));
+    }
   libgcc_s_resume (exc);
 }
 
@@ -78,7 +82,11 @@ __gcc_personality_v0 (int version, _Unwind_Action actions,
                       struct _Unwind_Context *context)
 {
   if (__builtin_expect (libgcc_s_personality == NULL, 0))
-    pthread_cancel_init ();
+    {
+      pthread_cancel_init ();
+      /* The function pointer has changed, ensure we reload it.  */
+      asm volatile ("" : "+m" (libgcc_s_personality));
+    }
   return libgcc_s_personality (version, actions, exception_class,
 			       ue_header, context);
 }
@@ -88,7 +96,11 @@ _Unwind_ForcedUnwind (struct _Unwind_Exception *exc, _Unwind_Stop_Fn stop,
 		      void *stop_argument)
 {
   if (__builtin_expect (libgcc_s_forcedunwind == NULL, 0))
-    pthread_cancel_init ();
+    {
+      pthread_cancel_init ();
+      /* The function pointer has changed, ensure we reload it.  */
+      asm volatile ("" : "+m" (libgcc_s_forcedunwind));
+    }
   return libgcc_s_forcedunwind (exc, stop, stop_argument);
 }
 
@@ -96,6 +108,10 @@ _Unwind_Word
 _Unwind_GetCFA (struct _Unwind_Context *context)
 {
   if (__builtin_expect (libgcc_s_getcfa == NULL, 0))
-    pthread_cancel_init ();
+    {
+      pthread_cancel_init ();
+      /* The function pointer has changed, ensure we reload it.  */
+      asm volatile ("" : "+m" (libgcc_s_getcfa));
+    }
   return libgcc_s_getcfa (context);
 }
diff --git a/nptl/sysdeps/unix/sysv/linux/ia64/unwind-forcedunwind.c b/nptl/sysdeps/unix/sysv/linux/ia64/unwind-forcedunwind.c
index fb44b42..a788fa3 100644
--- a/nptl/sysdeps/unix/sysv/linux/ia64/unwind-forcedunwind.c
+++ b/nptl/sysdeps/unix/sysv/linux/ia64/unwind-forcedunwind.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2003, 2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Jakub Jelinek <jakub@redhat.com>.
 
@@ -33,6 +33,10 @@ _Unwind_Word
 _Unwind_GetBSP (struct _Unwind_Context *context)
 {
   if (__builtin_expect (libgcc_s_getbsp == NULL, 0))
-    pthread_cancel_init ();
+    {
+      pthread_cancel_init ();
+      /* The function pointer has changed, ensure we reload it.  */
+      asm volatile ("" : "+m" (libgcc_s_getbsp));
+    }
   return libgcc_s_getbsp (context);
 }
-- 
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