mirror of
https://sourceware.org/git/binutils-gdb.git
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1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
272 lines
6.6 KiB
C
272 lines
6.6 KiB
C
/* DWARF attributes
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Copyright (C) 1994-2024 Free Software Foundation, Inc.
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Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
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Inc. with support from Florida State University (under contract
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with the Ada Joint Program Office), and Silicon Graphics, Inc.
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Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
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based on Fred Fish's (Cygnus Support) implementation of DWARF 1
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support.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "dwarf2/attribute.h"
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#include "dwarf2/stringify.h"
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#include "complaints.h"
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/* See attribute.h. */
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unrelocated_addr
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attribute::as_address () const
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{
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unrelocated_addr addr;
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gdb_assert (!requires_reprocessing);
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if (form != DW_FORM_addr && form != DW_FORM_addrx
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&& form != DW_FORM_GNU_addr_index)
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{
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/* Aside from a few clearly defined exceptions, attributes that
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contain an address must always be in DW_FORM_addr form.
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Unfortunately, some compilers happen to be violating this
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requirement by encoding addresses using other forms, such
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as DW_FORM_data4 for example. For those broken compilers,
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we try to do our best, without any guarantee of success,
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to interpret the address correctly. It would also be nice
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to generate a complaint, but that would require us to maintain
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a list of legitimate cases where a non-address form is allowed,
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as well as update callers to pass in at least the CU's DWARF
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version. This is more overhead than what we're willing to
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expand for a pretty rare case. */
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addr = (unrelocated_addr) u.unsnd;
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}
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else
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addr = u.addr;
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return addr;
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}
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/* See attribute.h. */
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bool
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attribute::form_is_string () const
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{
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return (form == DW_FORM_strp || form == DW_FORM_line_strp
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|| form == DW_FORM_string
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|| form == DW_FORM_strx
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|| form == DW_FORM_strx1
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|| form == DW_FORM_strx2
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|| form == DW_FORM_strx3
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|| form == DW_FORM_strx4
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|| form == DW_FORM_GNU_str_index
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|| form == DW_FORM_GNU_strp_alt);
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}
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/* See attribute.h. */
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const char *
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attribute::as_string () const
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{
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gdb_assert (!requires_reprocessing);
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if (form_is_string ())
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return u.str;
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return nullptr;
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}
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/* See attribute.h. */
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bool
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attribute::form_is_block () const
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{
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return (form == DW_FORM_block1
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|| form == DW_FORM_block2
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|| form == DW_FORM_block4
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|| form == DW_FORM_block
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|| form == DW_FORM_exprloc
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|| form == DW_FORM_data16);
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}
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/* See attribute.h. */
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bool
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attribute::form_is_section_offset () const
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{
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return (form == DW_FORM_data4
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|| form == DW_FORM_data8
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|| form == DW_FORM_sec_offset
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|| form == DW_FORM_loclistx);
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}
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/* See attribute.h. */
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bool
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attribute::form_is_constant () const
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{
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switch (form)
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{
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case DW_FORM_sdata:
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case DW_FORM_udata:
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case DW_FORM_data1:
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case DW_FORM_data2:
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case DW_FORM_data4:
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case DW_FORM_data8:
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case DW_FORM_implicit_const:
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return true;
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default:
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return false;
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}
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}
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/* See attribute.h. */
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void
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attribute::get_ref_die_offset_complaint () const
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{
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complaint (_("unsupported die ref attribute form: '%s'"),
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dwarf_form_name (form));
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}
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/* See attribute.h. */
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LONGEST
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attribute::constant_value (int default_value) const
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{
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if (form == DW_FORM_sdata || form == DW_FORM_implicit_const)
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return u.snd;
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else if (form == DW_FORM_udata
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|| form == DW_FORM_data1
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|| form == DW_FORM_data2
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|| form == DW_FORM_data4
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|| form == DW_FORM_data8)
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return u.unsnd;
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else
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{
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/* For DW_FORM_data16 see attribute::form_is_constant. */
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complaint (_("Attribute value is not a constant (%s)"),
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dwarf_form_name (form));
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return default_value;
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}
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}
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/* See attribute.h. */
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bool
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attribute::form_is_unsigned () const
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{
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return (form == DW_FORM_ref_addr
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|| form == DW_FORM_GNU_ref_alt
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|| form == DW_FORM_data2
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|| form == DW_FORM_data4
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|| form == DW_FORM_data8
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|| form == DW_FORM_sec_offset
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|| form == DW_FORM_data1
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|| form == DW_FORM_flag
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|| form == DW_FORM_flag_present
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|| form == DW_FORM_udata
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|| form == DW_FORM_rnglistx
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|| form == DW_FORM_loclistx
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|| form == DW_FORM_ref1
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|| form == DW_FORM_ref2
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|| form == DW_FORM_ref4
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|| form == DW_FORM_ref8
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|| form == DW_FORM_ref_udata);
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}
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/* See attribute.h. */
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bool
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attribute::form_is_signed () const
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{
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return form == DW_FORM_sdata || form == DW_FORM_implicit_const;
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}
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/* See attribute.h. */
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bool
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attribute::form_requires_reprocessing () const
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{
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return (form == DW_FORM_strx
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|| form == DW_FORM_strx1
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|| form == DW_FORM_strx2
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|| form == DW_FORM_strx3
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|| form == DW_FORM_strx4
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|| form == DW_FORM_GNU_str_index
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|| form == DW_FORM_addrx
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|| form == DW_FORM_GNU_addr_index
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|| form == DW_FORM_rnglistx
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|| form == DW_FORM_loclistx);
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}
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/* See attribute.h. */
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dwarf_defaulted_attribute
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attribute::defaulted () const
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{
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LONGEST value = constant_value (-1);
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switch (value)
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{
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case DW_DEFAULTED_no:
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case DW_DEFAULTED_in_class:
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case DW_DEFAULTED_out_of_class:
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return (dwarf_defaulted_attribute) value;
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}
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/* If the form was not constant, we already complained in
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constant_value, so there's no need to complain again. */
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if (form_is_constant ())
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complaint (_("unrecognized DW_AT_defaulted value (%s)"),
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plongest (value));
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return DW_DEFAULTED_no;
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}
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/* See attribute.h. */
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dwarf_virtuality_attribute
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attribute::as_virtuality () const
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{
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LONGEST value = constant_value (-1);
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switch (value)
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{
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case DW_VIRTUALITY_none:
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case DW_VIRTUALITY_virtual:
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case DW_VIRTUALITY_pure_virtual:
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return (dwarf_virtuality_attribute) value;
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}
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/* If the form was not constant, we already complained in
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constant_value, so there's no need to complain again. */
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if (form_is_constant ())
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complaint (_("unrecognized DW_AT_virtuality value (%s)"),
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plongest (value));
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return DW_VIRTUALITY_none;
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}
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/* See attribute.h. */
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bool
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attribute::as_boolean () const
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{
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if (form == DW_FORM_flag_present)
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return true;
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else if (form == DW_FORM_flag)
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return u.unsnd != 0;
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return constant_value (0) != 0;
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}
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