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/* Pedantic checking of DWARF files
Copyright (C) 2010, 2011 Red Hat, Inc.
This file is part of elfutils.
This file is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
elfutils is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "dwarf_version-imp.hh"
#include "dwarf_2.hh"
#include "../libdw/dwarf.h"
namespace
{
typedef preset_attribute<cl_reference, cl_constant> const_or_ref_attribute;
struct dwarf_2_attributes
: public attribute_table
{
dwarf_2_attributes ()
{
// Note about location descriptions in DWARF 2 (and 3). In
// DWARF 2, location expressions can have classes of cl_constant
// or cl_block. But we need to tell those block expressions
// from any old block attribute to validate the expression, and
// those constants from any old number to validate the
// reference. So we retrofit all the DW_FORM_block* forms and
// appropriate attributes with cl_exprloc form DWARF 4 and
// cl_loclistptr (even though in DWARF 4 it's actually only
// DW_FORM_exprloc that has this class).
//
// Similarly with cl_lineptr and cl_macptr. cl_rangelistptr
// wasn't introduced until DWARF 3.
add (ref_attribute (DW_AT_sibling));
add (location_attribute (DW_AT_location));
add (string_attribute (DW_AT_name));
add (const_attribute (DW_AT_ordering));
add (const_attribute (DW_AT_byte_size));
add (const_attribute (DW_AT_bit_offset));
add (const_attribute (DW_AT_bit_size));
add (attribute (DW_AT_stmt_list, cl_lineptr));
add (addr_attribute (DW_AT_low_pc));
add (addr_attribute (DW_AT_high_pc));
add (const_attribute (DW_AT_language));
add (ref_attribute (DW_AT_discr));
add (const_attribute (DW_AT_discr_value));
add (const_attribute (DW_AT_visibility));
add (ref_attribute (DW_AT_import));
add (location_attribute (DW_AT_string_length));
add (ref_attribute (DW_AT_common_reference));
add (string_attribute (DW_AT_comp_dir));
add (attribute (DW_AT_const_value,
dw_class_set (cl_string, cl_constant, cl_block)));
add (ref_attribute (DW_AT_containing_type));
add (ref_attribute (DW_AT_default_value));
add (const_attribute (DW_AT_inline));
add (flag_attribute (DW_AT_is_optional));
add (const_or_ref_attribute (DW_AT_lower_bound));
add (string_attribute (DW_AT_producer));
add (flag_attribute (DW_AT_prototyped));
add (location_attribute (DW_AT_return_addr));
add (const_attribute (DW_AT_start_scope));
add (const_attribute (DW_AT_bit_stride));
add (const_or_ref_attribute (DW_AT_upper_bound));
add (ref_attribute (DW_AT_abstract_origin));
add (const_attribute (DW_AT_accessibility));
add (const_attribute (DW_AT_address_class));
add (flag_attribute (DW_AT_artificial));
add (ref_attribute (DW_AT_base_types));
add (const_attribute (DW_AT_calling_convention));
add (const_or_ref_attribute (DW_AT_count));
add (static_location_attribute (DW_AT_data_member_location));
add (const_attribute (DW_AT_decl_column));
add (const_attribute (DW_AT_decl_file));
add (const_attribute (DW_AT_decl_line));
add (flag_attribute (DW_AT_declaration));
add (block_attribute (DW_AT_discr_list));
add (const_attribute (DW_AT_encoding));
add (flag_attribute (DW_AT_external));
add (location_attribute (DW_AT_frame_base));
add (ref_attribute (DW_AT_friend));
add (const_attribute (DW_AT_identifier_case));
add (attribute (DW_AT_macro_info, cl_macptr));
add (block_attribute (DW_AT_namelist_item));
add (ref_attribute (DW_AT_priority));
add (location_attribute (DW_AT_segment));
add (ref_attribute (DW_AT_specification));
add (location_attribute (DW_AT_static_link));
add (ref_attribute (DW_AT_type));
add (location_attribute (DW_AT_use_location));
add (flag_attribute (DW_AT_variable_parameter));
add (const_attribute (DW_AT_virtuality));
add (static_location_attribute (DW_AT_vtable_elem_location));
}
};
struct exprloc_form
: public preset_form<sc_block, cl_exprloc, cl_block>
{
exprloc_form (int a_name, form_width_t a_width)
: preset_form<sc_block, cl_exprloc, cl_block> (a_name, a_width)
{}
};
struct dwarf_2_forms
: public form_table
{
dwarf_2_forms ()
{
add (exprloc_form (DW_FORM_block, fw_uleb));
add (exprloc_form (DW_FORM_block1, fw_1));
add (exprloc_form (DW_FORM_block2, fw_2));
add (exprloc_form (DW_FORM_block4, fw_4));
// These constant forms can in theory, in legal DWARF 2,
// represent various pointers.
typedef preset_form<sc_value,
cl_constant, cl_lineptr, cl_loclistptr,
cl_macptr> dw2_data_form;
add (dw2_data_form (DW_FORM_data1, fw_1));
add (dw2_data_form (DW_FORM_data2, fw_2));
add (dw2_data_form (DW_FORM_data4, fw_4));
add (dw2_data_form (DW_FORM_data8, fw_8));
add (dw2_data_form (DW_FORM_sdata, fw_sleb));
add (dw2_data_form (DW_FORM_udata, fw_uleb));
add (flag_form (DW_FORM_flag, fw_1));
add (ref_form (DW_FORM_ref1, fw_1));
add (ref_form (DW_FORM_ref2, fw_2));
add (ref_form (DW_FORM_ref4, fw_4));
add (ref_form (DW_FORM_ref8, fw_8, fb_64));
add (ref_form (DW_FORM_ref_udata, fw_uleb));
add (string_form (DW_FORM_string));
add (offset_form (DW_FORM_strp, cl_string));
add (address_form (DW_FORM_addr, cl_address));
add (address_form (DW_FORM_ref_addr, cl_reference));
add (form (DW_FORM_indirect, cl_indirect, fw_uleb, sc_value));
}
};
struct dwarf_2_t
: public std_dwarf
{
dwarf_2_t ()
: std_dwarf (dwarf_2_attributes (), dwarf_2_forms ())
{}
};
}
dwarf_version const *
dwarf_2 ()
{
static dwarf_2_t dw;
return &dw;
}
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