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3666a04883
This commits the result of running gdb/copyright.py as per our Start
of New Year procedure...
gdb/ChangeLog
Update copyright year range in copyright header of all GDB files.
123 lines
4.2 KiB
C
123 lines
4.2 KiB
C
/* Low-level DWARF 2 reading code
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Copyright (C) 1994-2021 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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#ifndef GDB_DWARF2_COMP_UNIT_H
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#define GDB_DWARF2_COMP_UNIT_H
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#include "dwarf2/leb.h"
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#include "gdbtypes.h"
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/* The data in a compilation unit header, after target2host
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translation, looks like this. */
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struct comp_unit_head
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{
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unsigned int length;
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short version;
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unsigned char addr_size;
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unsigned char signed_addr_p;
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sect_offset abbrev_sect_off;
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/* Size of file offsets; either 4 or 8. */
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unsigned int offset_size;
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/* Size of the length field; either 4 or 12. */
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unsigned int initial_length_size;
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enum dwarf_unit_type unit_type;
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/* Offset to the first byte of this compilation unit header in the
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.debug_info section, for resolving relative reference dies. */
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sect_offset sect_off;
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/* Offset to first die in this cu from the start of the cu.
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This will be the first byte following the compilation unit header. */
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cu_offset first_die_cu_offset;
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/* 64-bit signature of this unit. For type units, it denotes the signature of
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the type (DW_UT_type in DWARF 4, additionally DW_UT_split_type in DWARF 5).
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Also used in DWARF 5, to denote the dwo id when the unit type is
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DW_UT_skeleton or DW_UT_split_compile. */
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ULONGEST signature;
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/* For types, offset in the type's DIE of the type defined by this TU. */
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cu_offset type_cu_offset_in_tu;
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/* Return the total length of the CU described by this header. */
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unsigned int get_length () const
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{
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return initial_length_size + length;
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}
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/* Return TRUE if OFF is within this CU. */
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bool offset_in_cu_p (sect_offset off) const
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{
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sect_offset bottom = sect_off;
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sect_offset top = sect_off + get_length ();
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return off >= bottom && off < top;
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}
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/* Read an offset from the data stream. The size of the offset is
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given by cu_header->offset_size. */
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LONGEST read_offset (bfd *abfd, const gdb_byte *buf,
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unsigned int *bytes_read) const
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{
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LONGEST offset = ::read_offset (abfd, buf, offset_size);
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*bytes_read = offset_size;
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return offset;
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}
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/* Read an address from BUF. BYTES_READ is updated. */
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CORE_ADDR read_address (bfd *abfd, const gdb_byte *buf,
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unsigned int *bytes_read) const;
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};
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/* Expected enum dwarf_unit_type for read_comp_unit_head. */
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enum class rcuh_kind { COMPILE, TYPE };
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/* Read in the comp unit header information from the debug_info at info_ptr.
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Use rcuh_kind::COMPILE as the default type if not known by the caller.
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NOTE: This leaves members offset, first_die_offset to be filled in
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by the caller. */
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extern const gdb_byte *read_comp_unit_head
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(struct comp_unit_head *cu_header,
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const gdb_byte *info_ptr,
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struct dwarf2_section_info *section,
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rcuh_kind section_kind);
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/* Read in a CU/TU header and perform some basic error checking.
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The contents of the header are stored in HEADER.
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The result is a pointer to the start of the first DIE. */
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extern const gdb_byte *read_and_check_comp_unit_head
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(dwarf2_per_objfile *per_objfile,
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struct comp_unit_head *header,
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struct dwarf2_section_info *section,
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struct dwarf2_section_info *abbrev_section,
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const gdb_byte *info_ptr,
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rcuh_kind section_kind);
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#endif /* GDB_DWARF2_COMP_UNIT_H */
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