2010-04-20 Stan Shebs <stan@codesourcery.com>

2010-04-20  Stan Shebs  <stan@codesourcery.com>
	    Nathan Sidwell  <nathan@codesourcery.com>

	* dwarf2loc.c (struct axs_var_loc): New struct.
	(dwarf2_tracepoint_var_loc): New function.
	(dwarf2_tracepoint_var_access): New function.
	(dwarf2_tracepoint_var_ref): Use dwarf2_tracepoint_var_loc, deal
	with DW_OP_piece.
	(locexpr_describe_location_piece): New function.
	(locexpr_describe_location_1): New function.
	(locexpr_describe_location): Call it, update signature.
	(loclist_describe_location): Rewrite to loop over locations,
	update signature.
	* symtab.h (struct symbol_computed_ops): Add address to
	describe_location arguments, return void.
	* printcmd.c (address_info): Get context PC, pass to computed
	location description.
	* tracepoint.c (scope_info): Ditto.
	* ax-gdb.c (trace_kludge): Export.