2009-07-12 Michael Snyder <msnyder@vmware.com>

	* i386-tdep.c: Add a frame unwinder for function epilogues.
	(i386_in_function_epilogue_p): New function.
	(i386_epilogue_frame_sniffer): New function.
	(i386_epilogue_frame_cache): New function.
	(i386_epilogue_frame_this_id): New function.
	(i386_epilogue_frame_unwind): New struct frame_unwind.
	(i386_gdbarch_init): Hook the new unwinder.