The attached ia64 patch fixes a few problems, most notably backtracing through 
signal handlers.

Ok to commit?

2003-10-17  Jeff Johnston  <jjohnstn@redhat.com>

	* ia64-tdep.c: Change all references of DEPRECATED_REGISTER_RAW_SIZE
	to use register_size() instead.
	(ia64_frame_cache): Add new prev_cfm field.
	(ia64_alloc_frame_cache):  Initialize new prev_cfm field to 0.
	(floatformat_valid): New static routine.
	(floatformat_ia64_ext): Add name field and set up is_valid routine
	to floatformat_valid().
	(examine_prologue):  For the previous cfm, use frame_unwind_register()
	if the cfm is not stored in a register-stack register.  Save the
	previous cfm value in the prev_cfm field.  Add debug output.
	(ia64_frame_this_id): Use frame_id_build_special() to also register
	the bsp.  Add debug output.
	(ia64_sigtramp_frame_this_id): Ditto.
	(ia64_frame_prev_register):  Look at cache saved_regs for a few more
	registers and also add some checks for framelessness before accepting
	current register values for fields such as return address.  For cfm,
	use the cached prev_cfm field if available.  Add debug output.
	(ia64_sigtramp_frame_init_saved_regs): Bump up base by 16 to get
	sp needed for calling lower level 	
	ia64_linux_sigcontext_register_address().  Also save the
	bsp and sp address as part of initialization.
	(ia64_sigtramp_frame_cache): Don't bother using cached stack size as it
	won't be set.  Cache the bsp and cfm values.
	(ia64_sigtramp_frame_prev_register): Flesh this routine out instead of
	using ia64_frame_prev_register().  The saved values for bsp and sp can
	be taken from the cache.  Add debug output.
	(ia64_push_dummy_call): Use frame_id_build_special() to also register
	the bsp.