2010-08-26  Maciej Rozycki  <macro@codesourcery.com>

	Merge from Sourcery G++ 4.4:

	2009-02-17  Andrew Jenner  <andrew@codesourcery.com>
	            Maciej Rozycki  <macro@codesourcery.com>

	gcc/
	* unwind.inc (_Unwind_RaiseException): Use return value of
	uw_init_context.
	* unwind-dw2.c (uw_init_context): Make macro an expression instead of
	a statement.
	(uw_init_context_1): Add return value.
	* unwind-sjlj.c (uw_init_context): Add return value.

 2010-08-26  Andrew Stubbs  <ams@codesourcery.com>
 
 	Merge from Ubuntu GCC:

=== modified file 'gcc/unwind-dw2.c'
--- old/gcc/unwind-dw2.c	2010-04-27 08:41:30 +0000
+++ new/gcc/unwind-dw2.c	2010-08-26 15:38:19 +0000
@@ -1414,16 +1414,12 @@
 /* Fill in CONTEXT for top-of-stack.  The only valid registers at this
    level will be the return address and the CFA.  */
 
-#define uw_init_context(CONTEXT)					   \
-  do									   \
-    {									   \
-      /* Do any necessary initialization to access arbitrary stack frames. \
-	 On the SPARC, this means flushing the register windows.  */	   \
-      __builtin_unwind_init ();						   \
-      uw_init_context_1 (CONTEXT, __builtin_dwarf_cfa (),		   \
-			 __builtin_return_address (0));			   \
-    }									   \
-  while (0)
+#define uw_init_context(CONTEXT)					\
+  /* Do any necessary initialization to access arbitrary stack frames.	\
+     On the SPARC, this means flushing the register windows.  */	\
+  (__builtin_unwind_init (),						\
+   uw_init_context_1 ((CONTEXT), __builtin_dwarf_cfa (),		\
+		      __builtin_return_address (0)))
 
 static inline void
 init_dwarf_reg_size_table (void)
@@ -1431,7 +1427,7 @@
   __builtin_init_dwarf_reg_size_table (dwarf_reg_size_table);
 }
 
-static void __attribute__((noinline))
+static _Unwind_Reason_Code __attribute__((noinline))
 uw_init_context_1 (struct _Unwind_Context *context,
 		   void *outer_cfa, void *outer_ra)
 {
@@ -1445,7 +1441,8 @@
   context->flags = EXTENDED_CONTEXT_BIT;
 
   code = uw_frame_state_for (context, &fs);
-  gcc_assert (code == _URC_NO_REASON);
+  if (code != _URC_NO_REASON)
+    return code;
 
 #if __GTHREADS
   {
@@ -1471,6 +1468,8 @@
      initialization context, then we can't see it in the given
      call frame data.  So have the initialization context tell us.  */
   context->ra = __builtin_extract_return_addr (outer_ra);
+
+  return _URC_NO_REASON;
 }
 
 static void _Unwind_DebugHook (void *, void *)

=== modified file 'gcc/unwind-sjlj.c'
--- old/gcc/unwind-sjlj.c	2009-04-09 14:00:19 +0000
+++ new/gcc/unwind-sjlj.c	2010-08-26 15:38:19 +0000
@@ -292,10 +292,11 @@
   uw_update_context (context, fs);
 }
 
-static inline void
+static inline _Unwind_Reason_Code
 uw_init_context (struct _Unwind_Context *context)
 {
   context->fc = _Unwind_SjLj_GetContext ();
+  return _URC_NO_REASON;
 }
 
 static void __attribute__((noreturn))

=== modified file 'gcc/unwind.inc'
--- old/gcc/unwind.inc	2009-04-09 14:00:19 +0000
+++ new/gcc/unwind.inc	2010-08-26 15:38:19 +0000
@@ -85,7 +85,8 @@
   _Unwind_Reason_Code code;
 
   /* Set up this_context to describe the current stack frame.  */
-  uw_init_context (&this_context);
+  code = uw_init_context (&this_context);
+  gcc_assert (code == _URC_NO_REASON);
   cur_context = this_context;
 
   /* Phase 1: Search.  Unwind the stack, calling the personality routine
@@ -198,7 +199,8 @@
   struct _Unwind_Context this_context, cur_context;
   _Unwind_Reason_Code code;
 
-  uw_init_context (&this_context);
+  code = uw_init_context (&this_context);
+  gcc_assert (code == _URC_NO_REASON);
   cur_context = this_context;
 
   exc->private_1 = (_Unwind_Ptr) stop;
@@ -221,7 +223,8 @@
   struct _Unwind_Context this_context, cur_context;
   _Unwind_Reason_Code code;
 
-  uw_init_context (&this_context);
+  code = uw_init_context (&this_context);
+  gcc_assert (code == _URC_NO_REASON);
   cur_context = this_context;
 
   /* Choose between continuing to process _Unwind_RaiseException
@@ -251,7 +254,8 @@
   if (exc->private_1 == 0)
     return _Unwind_RaiseException (exc);
 
-  uw_init_context (&this_context);
+  code = uw_init_context (&this_context);
+  gcc_assert (code == _URC_NO_REASON);
   cur_context = this_context;
 
   code = _Unwind_ForcedUnwind_Phase2 (exc, &cur_context);
@@ -280,7 +284,9 @@
   struct _Unwind_Context context;
   _Unwind_Reason_Code code;
 
-  uw_init_context (&context);
+  code = uw_init_context (&context);
+  if (code != _URC_NO_REASON)
+    return _URC_FATAL_PHASE1_ERROR;
 
   while (1)
     {