2003-04-13 Daniel Jacobowitz <drow@mvista.com>

2003-04-13  Daniel Jacobowitz  <drow@mvista.com>

	* dwarf2expr.c (dwarf2_read_address): Renamed from read_address;
	made non-static.
	(execute_stack_op): All callers updated.
	* dwarf2expr.h: Add prototype for dwarf2_read_address.
	* dwarf2loc.c (find_location_expression): New function.
	(dwarf_expr_frame_base): Call it.
	(dwarf2_evaluate_loc_desc): Handle 0-length location expressions.
	(dwarf2_tracepoint_var_ref): New function, broken out from
	locexpr_tracepoint_var_ref.
	(locexpr_tracepoint_var_ref): Call dwarf2_tracepoint_var_ref.
	Make static.
	(loclist_read_variable, loclist_read_needs_frame): New functions.
	(loclist_describe_location, loclist_tracepoint_var_ref): New
	functions.
	(dwarf2_loclist_funcs): New struct location_funcs.
	* dwarf2loc.h (struct dwarf2_loclist_baton): New type.
	(struct dwarf2_locexpr_baton): Add comments.
	(dwarf2_loclist_funcs): New extern.
	* dwarf2read.c (struct comp_unit_head): Remove DIE member, add
	base_address and base_known.
	(dwarf_loc_buffer): New variable.
	(struct dwarf2_pinfo): Add dwarf_loc_buffer and dwarf_loc_size.
	(DWARF_LOC_BUFFER, DWARF_LOC_SIZE): New macros.
	(dwarf2_has_info): Initialize dwarf_loc_offset.
	(dwarf2_build_psymtabs): Read in .debug_loc.
	(dwarf2_build_psymtabs_hard): Use DWARF_LOC_BUFFER and
	DWARF_LOC_SIZE.
	(psymtab_to_symtab_1): Likewise.  Move base address calculation
	here, from...
	(dwarf2_get_pc_bounds): ... here.  Use the base address from
	cu_header.
	(dwarf2_symbol_mark_computed): Handle location lists.