2004-03-21 Andrew Cagney <cagney@redhat.com>

2004-03-21  Andrew Cagney  <cagney@redhat.com>

	* frame-unwind.h: Update copyright.
	(struct frame_data): Add opaque declaration.
	(frame_sniffer_ftype): Declare.
	(struct frame_unwind): Add "unwind_data" and "sniffer".
	(frame_unwind_register_unwinder): Declare.
	(frame_unwind_find_by_frame): Add parameter "this_cache".
	* frame.c (get_frame_id, create_new_frame, legacy_get_prev_frame)
	(legacy_get_prev_frame, legacy_get_prev_frame)
	(get_frame_type): Pass the prologue_cache to
	frame_unwind_find_by_frame.
	* frame-unwind.c (struct frame_unwind_table_entry): Add field
	"unwinder".
	(frame_unwind_register_unwinder): New function.
	(frame_unwind_find_by_frame): Handle an unwind sniffer.