mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-27 04:52:05 +08:00
4a94e36819
This commit brings all the changes made by running gdb/copyright.py as per GDB's Start of New Year Procedure. For the avoidance of doubt, all changes in this commits were performed by the script.
272 lines
6.6 KiB
C
272 lines
6.6 KiB
C
/* DWARF attributes
|
|
|
|
Copyright (C) 1994-2022 Free Software Foundation, Inc.
|
|
|
|
Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
|
|
Inc. with support from Florida State University (under contract
|
|
with the Ada Joint Program Office), and Silicon Graphics, Inc.
|
|
Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
|
|
based on Fred Fish's (Cygnus Support) implementation of DWARF 1
|
|
support.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program 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.
|
|
|
|
This program 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 "defs.h"
|
|
#include "dwarf2/attribute.h"
|
|
#include "dwarf2/stringify.h"
|
|
#include "complaints.h"
|
|
|
|
/* See attribute.h. */
|
|
|
|
CORE_ADDR
|
|
attribute::as_address () const
|
|
{
|
|
CORE_ADDR addr;
|
|
|
|
gdb_assert (!requires_reprocessing);
|
|
|
|
if (form != DW_FORM_addr && form != DW_FORM_addrx
|
|
&& form != DW_FORM_GNU_addr_index)
|
|
{
|
|
/* Aside from a few clearly defined exceptions, attributes that
|
|
contain an address must always be in DW_FORM_addr form.
|
|
Unfortunately, some compilers happen to be violating this
|
|
requirement by encoding addresses using other forms, such
|
|
as DW_FORM_data4 for example. For those broken compilers,
|
|
we try to do our best, without any guarantee of success,
|
|
to interpret the address correctly. It would also be nice
|
|
to generate a complaint, but that would require us to maintain
|
|
a list of legitimate cases where a non-address form is allowed,
|
|
as well as update callers to pass in at least the CU's DWARF
|
|
version. This is more overhead than what we're willing to
|
|
expand for a pretty rare case. */
|
|
addr = u.unsnd;
|
|
}
|
|
else
|
|
addr = u.addr;
|
|
|
|
return addr;
|
|
}
|
|
|
|
/* See attribute.h. */
|
|
|
|
bool
|
|
attribute::form_is_string () const
|
|
{
|
|
return (form == DW_FORM_strp || form == DW_FORM_line_strp
|
|
|| form == DW_FORM_string
|
|
|| form == DW_FORM_strx
|
|
|| form == DW_FORM_strx1
|
|
|| form == DW_FORM_strx2
|
|
|| form == DW_FORM_strx3
|
|
|| form == DW_FORM_strx4
|
|
|| form == DW_FORM_GNU_str_index
|
|
|| form == DW_FORM_GNU_strp_alt);
|
|
}
|
|
|
|
/* See attribute.h. */
|
|
|
|
const char *
|
|
attribute::as_string () const
|
|
{
|
|
gdb_assert (!requires_reprocessing);
|
|
if (form_is_string ())
|
|
return u.str;
|
|
return nullptr;
|
|
}
|
|
|
|
/* See attribute.h. */
|
|
|
|
bool
|
|
attribute::form_is_block () const
|
|
{
|
|
return (form == DW_FORM_block1
|
|
|| form == DW_FORM_block2
|
|
|| form == DW_FORM_block4
|
|
|| form == DW_FORM_block
|
|
|| form == DW_FORM_exprloc
|
|
|| form == DW_FORM_data16);
|
|
}
|
|
|
|
/* See attribute.h. */
|
|
|
|
bool
|
|
attribute::form_is_section_offset () const
|
|
{
|
|
return (form == DW_FORM_data4
|
|
|| form == DW_FORM_data8
|
|
|| form == DW_FORM_sec_offset
|
|
|| form == DW_FORM_loclistx);
|
|
}
|
|
|
|
/* See attribute.h. */
|
|
|
|
bool
|
|
attribute::form_is_constant () const
|
|
{
|
|
switch (form)
|
|
{
|
|
case DW_FORM_sdata:
|
|
case DW_FORM_udata:
|
|
case DW_FORM_data1:
|
|
case DW_FORM_data2:
|
|
case DW_FORM_data4:
|
|
case DW_FORM_data8:
|
|
case DW_FORM_implicit_const:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/* See attribute.h. */
|
|
|
|
void
|
|
attribute::get_ref_die_offset_complaint () const
|
|
{
|
|
complaint (_("unsupported die ref attribute form: '%s'"),
|
|
dwarf_form_name (form));
|
|
}
|
|
|
|
/* See attribute.h. */
|
|
|
|
LONGEST
|
|
attribute::constant_value (int default_value) const
|
|
{
|
|
if (form == DW_FORM_sdata || form == DW_FORM_implicit_const)
|
|
return u.snd;
|
|
else if (form == DW_FORM_udata
|
|
|| form == DW_FORM_data1
|
|
|| form == DW_FORM_data2
|
|
|| form == DW_FORM_data4
|
|
|| form == DW_FORM_data8)
|
|
return u.unsnd;
|
|
else
|
|
{
|
|
/* For DW_FORM_data16 see attribute::form_is_constant. */
|
|
complaint (_("Attribute value is not a constant (%s)"),
|
|
dwarf_form_name (form));
|
|
return default_value;
|
|
}
|
|
}
|
|
|
|
/* See attribute.h. */
|
|
|
|
bool
|
|
attribute::form_is_unsigned () const
|
|
{
|
|
return (form == DW_FORM_ref_addr
|
|
|| form == DW_FORM_GNU_ref_alt
|
|
|| form == DW_FORM_data2
|
|
|| form == DW_FORM_data4
|
|
|| form == DW_FORM_data8
|
|
|| form == DW_FORM_sec_offset
|
|
|| form == DW_FORM_data1
|
|
|| form == DW_FORM_flag
|
|
|| form == DW_FORM_flag_present
|
|
|| form == DW_FORM_udata
|
|
|| form == DW_FORM_rnglistx
|
|
|| form == DW_FORM_loclistx
|
|
|| form == DW_FORM_ref1
|
|
|| form == DW_FORM_ref2
|
|
|| form == DW_FORM_ref4
|
|
|| form == DW_FORM_ref8
|
|
|| form == DW_FORM_ref_udata);
|
|
}
|
|
|
|
/* See attribute.h. */
|
|
|
|
bool
|
|
attribute::form_is_signed () const
|
|
{
|
|
return form == DW_FORM_sdata || form == DW_FORM_implicit_const;
|
|
}
|
|
|
|
/* See attribute.h. */
|
|
|
|
bool
|
|
attribute::form_requires_reprocessing () const
|
|
{
|
|
return (form == DW_FORM_strx
|
|
|| form == DW_FORM_strx1
|
|
|| form == DW_FORM_strx2
|
|
|| form == DW_FORM_strx3
|
|
|| form == DW_FORM_strx4
|
|
|| form == DW_FORM_GNU_str_index
|
|
|| form == DW_FORM_addrx
|
|
|| form == DW_FORM_GNU_addr_index
|
|
|| form == DW_FORM_rnglistx
|
|
|| form == DW_FORM_loclistx);
|
|
}
|
|
|
|
/* See attribute.h. */
|
|
|
|
dwarf_defaulted_attribute
|
|
attribute::defaulted () const
|
|
{
|
|
LONGEST value = constant_value (-1);
|
|
|
|
switch (value)
|
|
{
|
|
case DW_DEFAULTED_no:
|
|
case DW_DEFAULTED_in_class:
|
|
case DW_DEFAULTED_out_of_class:
|
|
return (dwarf_defaulted_attribute) value;
|
|
}
|
|
|
|
/* If the form was not constant, we already complained in
|
|
constant_value, so there's no need to complain again. */
|
|
if (form_is_constant ())
|
|
complaint (_("unrecognized DW_AT_defaulted value (%s)"),
|
|
plongest (value));
|
|
return DW_DEFAULTED_no;
|
|
}
|
|
|
|
/* See attribute.h. */
|
|
|
|
dwarf_virtuality_attribute
|
|
attribute::as_virtuality () const
|
|
{
|
|
LONGEST value = constant_value (-1);
|
|
|
|
switch (value)
|
|
{
|
|
case DW_VIRTUALITY_none:
|
|
case DW_VIRTUALITY_virtual:
|
|
case DW_VIRTUALITY_pure_virtual:
|
|
return (dwarf_virtuality_attribute) value;
|
|
}
|
|
|
|
/* If the form was not constant, we already complained in
|
|
constant_value, so there's no need to complain again. */
|
|
if (form_is_constant ())
|
|
complaint (_("unrecognized DW_AT_virtuality value (%s)"),
|
|
plongest (value));
|
|
return DW_VIRTUALITY_none;
|
|
}
|
|
|
|
/* See attribute.h. */
|
|
|
|
bool
|
|
attribute::as_boolean () const
|
|
{
|
|
if (form == DW_FORM_flag_present)
|
|
return true;
|
|
else if (form == DW_FORM_flag)
|
|
return u.unsnd != 0;
|
|
return constant_value (0) != 0;
|
|
}
|