2008-04-23 Maxim Grigoriev <maxim2405@gmail.com>

	* Makefile.in (xtensa-tdep.o): Update dependencies.
	* configure.tgt (xtensa*): Update dependencies.
	* xtensa-tdep.c (arreg_number): Renamed from areg_number.
	Local variable areg renamed to arreg.
	(areg_number): New function.
	(xtensa_pseudo_register_read, xtensa_pseudo_register_write)
	(xtensa_extract_return_value, xtensa_store_return_value): areg_number
	replaced by arreg_number.
	(xtensa_windowed_frame_cache, struct xtensa_frame_cache): New comments.
	(xtensa_alloc_frame_cache): Initialize cache->wd.ws.
	(xtensa_scan_prologue): New function.
	(xtensa_frame_cache): New local fp_regnum. Handle separately the case,
	when ENTRY instraction hasn't been executed yet. Get the frame pointer
	value based on prologue analysis. Fix the bugs preventing WS and
	AR4-AR7/A11 registers from getting right values for intermediate frames,
	whose registers have been already spilled.
	(xtensa_frame_prev_register): Fix WS register value. Use are_number
	and arreg_number appropriately.
	(xtensa_gdbarch_init): Set solib_svr4_fetch_link_map_offsets to
	svr4_ilp32_fetch_link_map_offsets.

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