2011-03-10 Maxim Grigoriev <maxim2405@gmail.com>

2011-03-10  Maxim Grigoriev  <maxim2405@gmail.com>

	* xtensa-tdep.c (xtensa_c0reg_t): Update comments.
	(xtensa_call0_frame_cache_t): Update comments. New fields added.
	(xtensa_alloc_frame_cache): Add initialization for new fields.
	(xtensa_frame_cache): Change the way how call0_frame_cache () is called.
	(warning_once): New function.
	(xtensa_insn_kind): New item c0opc_and.
	(call0_classify_opcode): Add the case for AND instruction.
	(call0_track_op): Change arguments. New local variable litbase. Add the
	case to handle c0opc_and. Update algorithms for c0opc_mov, c0opc_l32r,
	c0opc_s32i to take into account dynamic stack adjustments in prologue.
	Add cases for c0opc_l32e, c0opc_s32e, c0opc_rfwo, c0opc_rfwu.
	(call0_analyze_prologue): Update the comments. Change arguments.
	Add the variety of updates to handle extended prologues, which now can
	conduct dynamic stack adjustments.
	(call0_frame_cache): Likewise.
	(xtensa_skip_prologue): Update call0_analyze_prologue () function call.
	(xtensa_gdbarch_init): Initialize xtensa_session_once_reported.