[PATCH]: Use new frame unwind for 68hc11

[Stephane Carrez]

Hi!

This patch implements the frame unwinder for 68hc11/68hc12 (based on various portions of
old frame analyser and m68k/i386/avr frame code).

Committed on mainline and 6_0.

	Stephane

2003-07-27  Stephane Carrez  <stcarrez@nerim.fr>

	* m68hc11-tdep.c (struct m68hc11_unwind_cache): New struct to hold
	frame unwind information.
	(m68hc11_scan_prologue): New function from m68hc11_guess_from_prologue
	and adapted for frame unwinding.
	(m68hc11_skip_prologue): Update to scan prologue in temporary object.
	(m68hc11_unwind_pc): New function.
	(m68hc11_frame_unwind_cache): New function to analyze frames.
	(m68hc11_frame_this_id): New function to create new frame struct.
	(m68hc11_frame_prev_register): New function to unwind a register from
	the frame.
	(m68hc11_frame_unwind): Default 68hc11/68hc12 unwinder.
	(m68hc11_frame_p): New function for the above.
	(m68hc11_frame_base_address): New function to return fp of frame.
	(m68hc11_frame_args_address): Update for frame.
	(m68hc11_frame_base): Default 68hc11/68hc12 frame.
	(m68hc11_unwind_sp): New function.
	(m68hc11_unwind_dummy_id): New function.
	(m68hc11_gdbarch_init): Install the above frames; remove deprecated
	calls.

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