re PR target/50737 (FAIL: Throw_3 -O3 execution, generic dwarf2 EH problem?)

libgcc/ChangeLog:

2011-10-16  Uros Bizjak  <ubizjak@gmail.com>
	    Eric Botcazou  <ebotcazou@adacore.com>

	PR target/50737
	* config/alpha/linux-unwind.h (alpha_fallback_frame_state): Set
	fs->signal_frame to 1.

libjava/ChangeLog:

2011-10-16  Uros Bizjak  <ubizjak@gmail.com>
	    Eric Botcazou  <ebotcazou@adacore.com>

	PR target/50737
	* include/dwarf2-signal.h [__alpha__]: Remove MAKE_THROW_FRAME
	definition.


Co-Authored-By: Eric Botcazou <ebotcazou@adacore.com>

From-SVN: r180098

libgcc/ChangeLog

+2011-10-16  Uros Bizjak  <ubizjak@gmail.com>
+	    Eric Botcazou  <ebotcazou@adacore.com>
+
+	PR target/50737
+	* config/alpha/linux-unwind.h (alpha_fallback_frame_state): Set
+	fs->signal_frame to 1.
+
 2011-10-07  Ian Lance Taylor  <iant@google.com>
 
 	* generic-morestack-thread.c: #include <errno.h>.

libgcc/config/alpha/linux-unwind.h

@@ -74,5 +74,7 @@ alpha_fallback_frame_state (struct _Unwind_Context *context,
   fs->regs.reg[64].how = REG_SAVED_OFFSET;
   fs->regs.reg[64].loc.offset = (long)&sc->sc_pc - new_cfa;
   fs->retaddr_column = 64;
+  fs->signal_frame = 1;
+
   return _URC_NO_REASON;
 }

libjava/ChangeLog

+2011-10-16  Uros Bizjak  <ubizjak@gmail.com>
+	    Eric Botcazou  <ebotcazou@adacore.com>
+
+	PR target/50737
+	* include/dwarf2-signal.h [__alpha__]: Remove MAKE_THROW_FRAME
+	definition.
+
 2011-08-10  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
 	* exception.cc (std::abort): Remove static.

libjava/include/dwarf2-signal.h

@@ -29,20 +29,7 @@ class java::lang::Throwable;
 // then throw an exception.  With the dwarf2 unwinder we don't usually
 // need to do anything, with some minor exceptions.
 
-#ifdef __alpha__
-#define MAKE_THROW_FRAME(_exception)					\
-do									\
-{									\
-  /* Alpha either leaves PC pointing at a faulting instruction or the	\
-   following instruction, depending on the signal.  SEGV always does	\
-   the former, so we adjust the saved PC to point to the following	\
-   instruction; this is what the handler in libgcc expects.  */		\
-  struct sigcontext *_sc = (struct sigcontext *)_p;			\
-  _sc->sc_pc += 4;							\
-}									\
-while (0)
-
-#elif defined(__ia64__)
+#ifdef __ia64__
 
 #define MAKE_THROW_FRAME(_exception)					\
 do									\