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7518 lines
212 KiB
C
7518 lines
212 KiB
C
/* DWARF 2 debugging format support for GDB.
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Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
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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 in dwarfread.c
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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 2 of the License, or (at
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your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "bfd.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "elf/dwarf2.h"
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#include "buildsym.h"
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#include "demangle.h"
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#include "expression.h"
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#include "filenames.h" /* for DOSish file names */
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#include "macrotab.h"
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#include "language.h"
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#include "complaints.h"
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#include "bcache.h"
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#include "dwarf2expr.h"
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#include "dwarf2loc.h"
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#include "cp-support.h"
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#include <fcntl.h>
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#include "gdb_string.h"
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#include "gdb_assert.h"
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#include <sys/types.h>
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#ifndef DWARF2_REG_TO_REGNUM
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#define DWARF2_REG_TO_REGNUM(REG) (REG)
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#endif
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#if 0
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/* .debug_info header for a compilation unit
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Because of alignment constraints, this structure has padding and cannot
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be mapped directly onto the beginning of the .debug_info section. */
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typedef struct comp_unit_header
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{
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unsigned int length; /* length of the .debug_info
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contribution */
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unsigned short version; /* version number -- 2 for DWARF
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version 2 */
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unsigned int abbrev_offset; /* offset into .debug_abbrev section */
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unsigned char addr_size; /* byte size of an address -- 4 */
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}
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_COMP_UNIT_HEADER;
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#define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
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#endif
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/* .debug_pubnames header
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Because of alignment constraints, this structure has padding and cannot
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be mapped directly onto the beginning of the .debug_info section. */
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typedef struct pubnames_header
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{
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unsigned int length; /* length of the .debug_pubnames
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contribution */
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unsigned char version; /* version number -- 2 for DWARF
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version 2 */
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unsigned int info_offset; /* offset into .debug_info section */
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unsigned int info_size; /* byte size of .debug_info section
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portion */
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}
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_PUBNAMES_HEADER;
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#define _ACTUAL_PUBNAMES_HEADER_SIZE 13
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/* .debug_pubnames header
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Because of alignment constraints, this structure has padding and cannot
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be mapped directly onto the beginning of the .debug_info section. */
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typedef struct aranges_header
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{
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unsigned int length; /* byte len of the .debug_aranges
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contribution */
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unsigned short version; /* version number -- 2 for DWARF
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version 2 */
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unsigned int info_offset; /* offset into .debug_info section */
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unsigned char addr_size; /* byte size of an address */
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unsigned char seg_size; /* byte size of segment descriptor */
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}
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_ARANGES_HEADER;
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#define _ACTUAL_ARANGES_HEADER_SIZE 12
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/* .debug_line statement program prologue
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Because of alignment constraints, this structure has padding and cannot
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be mapped directly onto the beginning of the .debug_info section. */
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typedef struct statement_prologue
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{
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unsigned int total_length; /* byte length of the statement
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information */
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unsigned short version; /* version number -- 2 for DWARF
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version 2 */
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unsigned int prologue_length; /* # bytes between prologue &
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stmt program */
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unsigned char minimum_instruction_length; /* byte size of
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smallest instr */
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unsigned char default_is_stmt; /* initial value of is_stmt
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register */
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char line_base;
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unsigned char line_range;
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unsigned char opcode_base; /* number assigned to first special
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opcode */
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unsigned char *standard_opcode_lengths;
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}
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_STATEMENT_PROLOGUE;
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/* offsets and sizes of debugging sections */
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static file_ptr dwarf_info_offset;
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static file_ptr dwarf_abbrev_offset;
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static file_ptr dwarf_line_offset;
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static file_ptr dwarf_pubnames_offset;
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static file_ptr dwarf_aranges_offset;
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static file_ptr dwarf_loc_offset;
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static file_ptr dwarf_macinfo_offset;
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static file_ptr dwarf_str_offset;
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static file_ptr dwarf_ranges_offset;
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file_ptr dwarf_frame_offset;
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file_ptr dwarf_eh_frame_offset;
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static unsigned int dwarf_info_size;
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static unsigned int dwarf_abbrev_size;
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static unsigned int dwarf_line_size;
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static unsigned int dwarf_pubnames_size;
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static unsigned int dwarf_aranges_size;
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static unsigned int dwarf_loc_size;
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static unsigned int dwarf_macinfo_size;
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static unsigned int dwarf_str_size;
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static unsigned int dwarf_ranges_size;
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unsigned int dwarf_frame_size;
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unsigned int dwarf_eh_frame_size;
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static asection *dwarf_info_section;
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static asection *dwarf_abbrev_section;
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static asection *dwarf_line_section;
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static asection *dwarf_pubnames_section;
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static asection *dwarf_aranges_section;
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static asection *dwarf_loc_section;
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static asection *dwarf_macinfo_section;
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static asection *dwarf_str_section;
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static asection *dwarf_ranges_section;
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asection *dwarf_frame_section;
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asection *dwarf_eh_frame_section;
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/* names of the debugging sections */
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#define INFO_SECTION ".debug_info"
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#define ABBREV_SECTION ".debug_abbrev"
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#define LINE_SECTION ".debug_line"
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#define PUBNAMES_SECTION ".debug_pubnames"
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#define ARANGES_SECTION ".debug_aranges"
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#define LOC_SECTION ".debug_loc"
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#define MACINFO_SECTION ".debug_macinfo"
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#define STR_SECTION ".debug_str"
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#define RANGES_SECTION ".debug_ranges"
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#define FRAME_SECTION ".debug_frame"
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#define EH_FRAME_SECTION ".eh_frame"
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/* local data types */
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/* We hold several abbreviation tables in memory at the same time. */
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#ifndef ABBREV_HASH_SIZE
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#define ABBREV_HASH_SIZE 121
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#endif
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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 long length;
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short version;
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unsigned int abbrev_offset;
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unsigned char addr_size;
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unsigned char signed_addr_p;
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unsigned int offset_size; /* size of file offsets; either 4 or 8 */
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unsigned int initial_length_size; /* size of the length field; either
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4 or 12 */
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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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unsigned int offset;
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/* Pointer to this compilation unit header in the .debug_info
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* section */
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char *cu_head_ptr;
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/* Pointer to the first die of this compilatio unit. This will
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* be the first byte following the compilation unit header. */
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char *first_die_ptr;
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/* Pointer to the next compilation unit header in the program. */
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struct comp_unit_head *next;
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/* DWARF abbreviation table associated with this compilation unit */
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struct abbrev_info *dwarf2_abbrevs[ABBREV_HASH_SIZE];
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/* Base address of this compilation unit. */
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CORE_ADDR base_address;
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/* Non-zero if base_address has been set. */
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int base_known;
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};
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/* The line number information for a compilation unit (found in the
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.debug_line section) begins with a "statement program header",
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which contains the following information. */
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struct line_header
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{
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unsigned int total_length;
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unsigned short version;
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unsigned int header_length;
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unsigned char minimum_instruction_length;
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unsigned char default_is_stmt;
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int line_base;
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unsigned char line_range;
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unsigned char opcode_base;
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/* standard_opcode_lengths[i] is the number of operands for the
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standard opcode whose value is i. This means that
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standard_opcode_lengths[0] is unused, and the last meaningful
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element is standard_opcode_lengths[opcode_base - 1]. */
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unsigned char *standard_opcode_lengths;
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/* The include_directories table. NOTE! These strings are not
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allocated with xmalloc; instead, they are pointers into
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debug_line_buffer. If you try to free them, `free' will get
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indigestion. */
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unsigned int num_include_dirs, include_dirs_size;
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char **include_dirs;
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/* The file_names table. NOTE! These strings are not allocated
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with xmalloc; instead, they are pointers into debug_line_buffer.
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Don't try to free them directly. */
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unsigned int num_file_names, file_names_size;
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struct file_entry
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{
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char *name;
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unsigned int dir_index;
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unsigned int mod_time;
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unsigned int length;
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} *file_names;
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/* The start and end of the statement program following this
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header. These point into dwarf_line_buffer. */
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char *statement_program_start, *statement_program_end;
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};
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/* When we construct a partial symbol table entry we only
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need this much information. */
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struct partial_die_info
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{
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enum dwarf_tag tag;
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unsigned char has_children;
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unsigned char is_external;
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unsigned char is_declaration;
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unsigned char has_type;
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unsigned int offset;
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unsigned int abbrev;
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char *name;
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int has_pc_info;
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CORE_ADDR lowpc;
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CORE_ADDR highpc;
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struct dwarf_block *locdesc;
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unsigned int language;
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char *sibling;
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};
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/* This data structure holds the information of an abbrev. */
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struct abbrev_info
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{
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unsigned int number; /* number identifying abbrev */
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enum dwarf_tag tag; /* dwarf tag */
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int has_children; /* boolean */
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unsigned int num_attrs; /* number of attributes */
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struct attr_abbrev *attrs; /* an array of attribute descriptions */
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struct abbrev_info *next; /* next in chain */
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};
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struct attr_abbrev
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{
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enum dwarf_attribute name;
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enum dwarf_form form;
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};
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/* This data structure holds a complete die structure. */
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struct die_info
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{
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enum dwarf_tag tag; /* Tag indicating type of die */
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unsigned short has_children; /* Does the die have children */
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unsigned int abbrev; /* Abbrev number */
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unsigned int offset; /* Offset in .debug_info section */
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unsigned int num_attrs; /* Number of attributes */
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struct attribute *attrs; /* An array of attributes */
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struct die_info *next_ref; /* Next die in ref hash table */
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struct die_info *next; /* Next die in linked list */
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struct type *type; /* Cached type information */
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};
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/* Attributes have a name and a value */
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struct attribute
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{
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enum dwarf_attribute name;
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enum dwarf_form form;
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union
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{
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char *str;
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struct dwarf_block *blk;
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unsigned long unsnd;
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long int snd;
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CORE_ADDR addr;
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}
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u;
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};
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struct function_range
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{
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const char *name;
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CORE_ADDR lowpc, highpc;
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int seen_line;
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struct function_range *next;
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};
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static struct function_range *cu_first_fn, *cu_last_fn, *cu_cached_fn;
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/* Get at parts of an attribute structure */
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#define DW_STRING(attr) ((attr)->u.str)
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#define DW_UNSND(attr) ((attr)->u.unsnd)
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#define DW_BLOCK(attr) ((attr)->u.blk)
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#define DW_SND(attr) ((attr)->u.snd)
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#define DW_ADDR(attr) ((attr)->u.addr)
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/* Blocks are a bunch of untyped bytes. */
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struct dwarf_block
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{
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unsigned int size;
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char *data;
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};
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#ifndef ATTR_ALLOC_CHUNK
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#define ATTR_ALLOC_CHUNK 4
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#endif
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/* A hash table of die offsets for following references. */
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#ifndef REF_HASH_SIZE
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#define REF_HASH_SIZE 1021
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#endif
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static struct die_info *die_ref_table[REF_HASH_SIZE];
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/* Obstack for allocating temporary storage used during symbol reading. */
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static struct obstack dwarf2_tmp_obstack;
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/* Offset to the first byte of the current compilation unit header,
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||
for resolving relative reference dies. */
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static unsigned int cu_header_offset;
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/* Allocate fields for structs, unions and enums in this size. */
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#ifndef DW_FIELD_ALLOC_CHUNK
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#define DW_FIELD_ALLOC_CHUNK 4
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#endif
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/* The language we are debugging. */
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static enum language cu_language;
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static const struct language_defn *cu_language_defn;
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/* Actually data from the sections. */
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static char *dwarf_info_buffer;
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static char *dwarf_abbrev_buffer;
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static char *dwarf_line_buffer;
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static char *dwarf_str_buffer;
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static char *dwarf_macinfo_buffer;
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static char *dwarf_ranges_buffer;
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static char *dwarf_loc_buffer;
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||
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/* A zeroed version of a partial die for initialization purposes. */
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static struct partial_die_info zeroed_partial_die;
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/* The generic symbol table building routines have separate lists for
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file scope symbols and all all other scopes (local scopes). So
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we need to select the right one to pass to add_symbol_to_list().
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We do it by keeping a pointer to the correct list in list_in_scope.
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||
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FIXME: The original dwarf code just treated the file scope as the first
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local scope, and all other local scopes as nested local scopes, and worked
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fine. Check to see if we really need to distinguish these
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in buildsym.c. */
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static struct pending **list_in_scope = &file_symbols;
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||
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||
/* FIXME: decode_locdesc sets these variables to describe the location
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||
to the caller. These ought to be a structure or something. If
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none of the flags are set, the object lives at the address returned
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||
by decode_locdesc. */
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||
|
||
static int optimized_out; /* No ops in location in expression,
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||
so object was optimized out. */
|
||
static int isreg; /* Object lives in register.
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||
decode_locdesc's return value is
|
||
the register number. */
|
||
static int offreg; /* Object's address is the sum of the
|
||
register specified by basereg, plus
|
||
the offset returned. */
|
||
static int basereg; /* See `offreg'. */
|
||
static int isderef; /* Value described by flags above is
|
||
the address of a pointer to the object. */
|
||
static int islocal; /* Variable is at the returned offset
|
||
from the frame start, but there's
|
||
no identified frame pointer for
|
||
this function, so we can't say
|
||
which register it's relative to;
|
||
use LOC_LOCAL. */
|
||
static int is_thread_local; /* Variable is at a constant offset in the
|
||
thread-local storage block for the
|
||
current thread and the dynamic linker
|
||
module containing this expression.
|
||
decode_locdesc returns the offset from
|
||
that base. */
|
||
|
||
/* DW_AT_frame_base values for the current function.
|
||
frame_base_reg is -1 if DW_AT_frame_base is missing, otherwise it
|
||
contains the register number for the frame register.
|
||
frame_base_offset is the offset from the frame register to the
|
||
virtual stack frame. */
|
||
static int frame_base_reg;
|
||
static CORE_ADDR frame_base_offset;
|
||
|
||
/* This value is added to each symbol value. FIXME: Generalize to
|
||
the section_offsets structure used by dbxread (once this is done,
|
||
pass the appropriate section number to end_symtab). */
|
||
static CORE_ADDR baseaddr; /* Add to each symbol value */
|
||
|
||
/* We put a pointer to this structure in the read_symtab_private field
|
||
of the psymtab.
|
||
The complete dwarf information for an objfile is kept in the
|
||
psymbol_obstack, so that absolute die references can be handled.
|
||
Most of the information in this structure is related to an entire
|
||
object file and could be passed via the sym_private field of the objfile.
|
||
It is however conceivable that dwarf2 might not be the only type
|
||
of symbols read from an object file. */
|
||
|
||
struct dwarf2_pinfo
|
||
{
|
||
/* Pointer to start of dwarf info buffer for the objfile. */
|
||
|
||
char *dwarf_info_buffer;
|
||
|
||
/* Offset in dwarf_info_buffer for this compilation unit. */
|
||
|
||
unsigned long dwarf_info_offset;
|
||
|
||
/* Pointer to start of dwarf abbreviation buffer for the objfile. */
|
||
|
||
char *dwarf_abbrev_buffer;
|
||
|
||
/* Size of dwarf abbreviation section for the objfile. */
|
||
|
||
unsigned int dwarf_abbrev_size;
|
||
|
||
/* Pointer to start of dwarf line buffer for the objfile. */
|
||
|
||
char *dwarf_line_buffer;
|
||
|
||
/* Size of dwarf_line_buffer, in bytes. */
|
||
|
||
unsigned int dwarf_line_size;
|
||
|
||
/* Pointer to start of dwarf string buffer for the objfile. */
|
||
|
||
char *dwarf_str_buffer;
|
||
|
||
/* Size of dwarf string section for the objfile. */
|
||
|
||
unsigned int dwarf_str_size;
|
||
|
||
/* Pointer to start of dwarf macro buffer for the objfile. */
|
||
|
||
char *dwarf_macinfo_buffer;
|
||
|
||
/* Size of dwarf macinfo section for the objfile. */
|
||
|
||
unsigned int dwarf_macinfo_size;
|
||
|
||
/* Pointer to start of dwarf ranges buffer for the objfile. */
|
||
|
||
char *dwarf_ranges_buffer;
|
||
|
||
/* Size of dwarf ranges buffer for the objfile. */
|
||
|
||
unsigned int dwarf_ranges_size;
|
||
|
||
/* Pointer to start of dwarf locations buffer for the objfile. */
|
||
|
||
char *dwarf_loc_buffer;
|
||
|
||
/* Size of dwarf locations buffer for the objfile. */
|
||
|
||
unsigned int dwarf_loc_size;
|
||
};
|
||
|
||
#define PST_PRIVATE(p) ((struct dwarf2_pinfo *)(p)->read_symtab_private)
|
||
#define DWARF_INFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_info_buffer)
|
||
#define DWARF_INFO_OFFSET(p) (PST_PRIVATE(p)->dwarf_info_offset)
|
||
#define DWARF_ABBREV_BUFFER(p) (PST_PRIVATE(p)->dwarf_abbrev_buffer)
|
||
#define DWARF_ABBREV_SIZE(p) (PST_PRIVATE(p)->dwarf_abbrev_size)
|
||
#define DWARF_LINE_BUFFER(p) (PST_PRIVATE(p)->dwarf_line_buffer)
|
||
#define DWARF_LINE_SIZE(p) (PST_PRIVATE(p)->dwarf_line_size)
|
||
#define DWARF_STR_BUFFER(p) (PST_PRIVATE(p)->dwarf_str_buffer)
|
||
#define DWARF_STR_SIZE(p) (PST_PRIVATE(p)->dwarf_str_size)
|
||
#define DWARF_MACINFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_macinfo_buffer)
|
||
#define DWARF_MACINFO_SIZE(p) (PST_PRIVATE(p)->dwarf_macinfo_size)
|
||
#define DWARF_RANGES_BUFFER(p) (PST_PRIVATE(p)->dwarf_ranges_buffer)
|
||
#define DWARF_RANGES_SIZE(p) (PST_PRIVATE(p)->dwarf_ranges_size)
|
||
#define DWARF_LOC_BUFFER(p) (PST_PRIVATE(p)->dwarf_loc_buffer)
|
||
#define DWARF_LOC_SIZE(p) (PST_PRIVATE(p)->dwarf_loc_size)
|
||
|
||
/* Maintain an array of referenced fundamental types for the current
|
||
compilation unit being read. For DWARF version 1, we have to construct
|
||
the fundamental types on the fly, since no information about the
|
||
fundamental types is supplied. Each such fundamental type is created by
|
||
calling a language dependent routine to create the type, and then a
|
||
pointer to that type is then placed in the array at the index specified
|
||
by it's FT_<TYPENAME> value. The array has a fixed size set by the
|
||
FT_NUM_MEMBERS compile time constant, which is the number of predefined
|
||
fundamental types gdb knows how to construct. */
|
||
static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */
|
||
|
||
/* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
|
||
but this would require a corresponding change in unpack_field_as_long
|
||
and friends. */
|
||
static int bits_per_byte = 8;
|
||
|
||
/* The routines that read and process dies for a C struct or C++ class
|
||
pass lists of data member fields and lists of member function fields
|
||
in an instance of a field_info structure, as defined below. */
|
||
struct field_info
|
||
{
|
||
/* List of data member and baseclasses fields. */
|
||
struct nextfield
|
||
{
|
||
struct nextfield *next;
|
||
int accessibility;
|
||
int virtuality;
|
||
struct field field;
|
||
}
|
||
*fields;
|
||
|
||
/* Number of fields. */
|
||
int nfields;
|
||
|
||
/* Number of baseclasses. */
|
||
int nbaseclasses;
|
||
|
||
/* Set if the accesibility of one of the fields is not public. */
|
||
int non_public_fields;
|
||
|
||
/* Member function fields array, entries are allocated in the order they
|
||
are encountered in the object file. */
|
||
struct nextfnfield
|
||
{
|
||
struct nextfnfield *next;
|
||
struct fn_field fnfield;
|
||
}
|
||
*fnfields;
|
||
|
||
/* Member function fieldlist array, contains name of possibly overloaded
|
||
member function, number of overloaded member functions and a pointer
|
||
to the head of the member function field chain. */
|
||
struct fnfieldlist
|
||
{
|
||
char *name;
|
||
int length;
|
||
struct nextfnfield *head;
|
||
}
|
||
*fnfieldlists;
|
||
|
||
/* Number of entries in the fnfieldlists array. */
|
||
int nfnfields;
|
||
};
|
||
|
||
/* Various complaints about symbol reading that don't abort the process */
|
||
|
||
static void
|
||
dwarf2_non_const_array_bound_ignored_complaint (const char *arg1)
|
||
{
|
||
complaint (&symfile_complaints, "non-constant array bounds form '%s' ignored",
|
||
arg1);
|
||
}
|
||
|
||
static void
|
||
dwarf2_statement_list_fits_in_line_number_section_complaint (void)
|
||
{
|
||
complaint (&symfile_complaints,
|
||
"statement list doesn't fit in .debug_line section");
|
||
}
|
||
|
||
static void
|
||
dwarf2_complex_location_expr_complaint (void)
|
||
{
|
||
complaint (&symfile_complaints, "location expression too complex");
|
||
}
|
||
|
||
static void
|
||
dwarf2_unsupported_at_frame_base_complaint (const char *arg1)
|
||
{
|
||
complaint (&symfile_complaints,
|
||
"unsupported DW_AT_frame_base for function '%s'", arg1);
|
||
}
|
||
|
||
static void
|
||
dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
|
||
int arg3)
|
||
{
|
||
complaint (&symfile_complaints,
|
||
"const value length mismatch for '%s', got %d, expected %d", arg1,
|
||
arg2, arg3);
|
||
}
|
||
|
||
static void
|
||
dwarf2_macros_too_long_complaint (void)
|
||
{
|
||
complaint (&symfile_complaints,
|
||
"macro info runs off end of `.debug_macinfo' section");
|
||
}
|
||
|
||
static void
|
||
dwarf2_macro_malformed_definition_complaint (const char *arg1)
|
||
{
|
||
complaint (&symfile_complaints,
|
||
"macro debug info contains a malformed macro definition:\n`%s'",
|
||
arg1);
|
||
}
|
||
|
||
static void
|
||
dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
|
||
{
|
||
complaint (&symfile_complaints,
|
||
"invalid attribute class or form for '%s' in '%s'", arg1, arg2);
|
||
}
|
||
|
||
/* local function prototypes */
|
||
|
||
static void dwarf2_locate_sections (bfd *, asection *, void *);
|
||
|
||
#if 0
|
||
static void dwarf2_build_psymtabs_easy (struct objfile *, int);
|
||
#endif
|
||
|
||
static void dwarf2_build_psymtabs_hard (struct objfile *, int);
|
||
|
||
static char *scan_partial_symbols (char *, struct objfile *,
|
||
CORE_ADDR *, CORE_ADDR *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void add_partial_symbol (struct partial_die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
|
||
|
||
static void psymtab_to_symtab_1 (struct partial_symtab *);
|
||
|
||
char *dwarf2_read_section (struct objfile *, file_ptr, unsigned int,
|
||
asection *);
|
||
|
||
static void dwarf2_read_abbrevs (bfd *abfd, struct comp_unit_head *cu_header);
|
||
|
||
static void dwarf2_empty_abbrev_table (void *);
|
||
|
||
static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
|
||
const struct comp_unit_head *cu_header);
|
||
|
||
static char *read_partial_die (struct partial_die_info *,
|
||
bfd *, char *,
|
||
const struct comp_unit_head *);
|
||
|
||
static char *read_full_die (struct die_info **, bfd *, char *,
|
||
const struct comp_unit_head *);
|
||
|
||
static char *read_attribute (struct attribute *, struct attr_abbrev *,
|
||
bfd *, char *, const struct comp_unit_head *);
|
||
|
||
static char *read_attribute_value (struct attribute *, unsigned,
|
||
bfd *, char *, const struct comp_unit_head *);
|
||
|
||
static unsigned int read_1_byte (bfd *, char *);
|
||
|
||
static int read_1_signed_byte (bfd *, char *);
|
||
|
||
static unsigned int read_2_bytes (bfd *, char *);
|
||
|
||
static unsigned int read_4_bytes (bfd *, char *);
|
||
|
||
static unsigned long read_8_bytes (bfd *, char *);
|
||
|
||
static CORE_ADDR read_address (bfd *, char *ptr, const struct comp_unit_head *,
|
||
int *bytes_read);
|
||
|
||
static LONGEST read_initial_length (bfd *, char *,
|
||
struct comp_unit_head *, int *bytes_read);
|
||
|
||
static LONGEST read_offset (bfd *, char *, const struct comp_unit_head *,
|
||
int *bytes_read);
|
||
|
||
static char *read_n_bytes (bfd *, char *, unsigned int);
|
||
|
||
static char *read_string (bfd *, char *, unsigned int *);
|
||
|
||
static char *read_indirect_string (bfd *, char *, const struct comp_unit_head *,
|
||
unsigned int *);
|
||
|
||
static unsigned long read_unsigned_leb128 (bfd *, char *, unsigned int *);
|
||
|
||
static long read_signed_leb128 (bfd *, char *, unsigned int *);
|
||
|
||
static void set_cu_language (unsigned int);
|
||
|
||
static struct attribute *dwarf_attr (struct die_info *, unsigned int);
|
||
|
||
static int die_is_declaration (struct die_info *);
|
||
|
||
static void free_line_header (struct line_header *lh);
|
||
|
||
static struct line_header *(dwarf_decode_line_header
|
||
(unsigned int offset,
|
||
bfd *abfd,
|
||
const struct comp_unit_head *cu_header));
|
||
|
||
static void dwarf_decode_lines (struct line_header *, char *, bfd *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void dwarf2_start_subfile (char *, char *);
|
||
|
||
static struct symbol *new_symbol (struct die_info *, struct type *,
|
||
struct objfile *, const struct comp_unit_head *);
|
||
|
||
static void dwarf2_const_value (struct attribute *, struct symbol *,
|
||
struct objfile *, const struct comp_unit_head *);
|
||
|
||
static void dwarf2_const_value_data (struct attribute *attr,
|
||
struct symbol *sym,
|
||
int bits);
|
||
|
||
static struct type *die_type (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static struct type *die_containing_type (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
#if 0
|
||
static struct type *type_at_offset (unsigned int, struct objfile *);
|
||
#endif
|
||
|
||
static struct type *tag_type_to_type (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void read_type_die (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void read_typedef (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void read_base_type (struct die_info *, struct objfile *);
|
||
|
||
static void read_file_scope (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void read_func_scope (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void read_lexical_block_scope (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static int dwarf2_get_pc_bounds (struct die_info *,
|
||
CORE_ADDR *, CORE_ADDR *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void dwarf2_add_field (struct field_info *, struct die_info *,
|
||
struct objfile *, const struct comp_unit_head *);
|
||
|
||
static void dwarf2_attach_fields_to_type (struct field_info *,
|
||
struct type *, struct objfile *);
|
||
|
||
static void dwarf2_add_member_fn (struct field_info *,
|
||
struct die_info *, struct type *,
|
||
struct objfile *objfile,
|
||
const struct comp_unit_head *);
|
||
|
||
static void dwarf2_attach_fn_fields_to_type (struct field_info *,
|
||
struct type *, struct objfile *);
|
||
|
||
static void read_structure_scope (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void read_common_block (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void read_namespace (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header);
|
||
|
||
static void read_enumeration (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static struct type *dwarf_base_type (int, int, struct objfile *);
|
||
|
||
static CORE_ADDR decode_locdesc (struct dwarf_block *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void read_array_type (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void read_tag_pointer_type (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void read_tag_ptr_to_member_type (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void read_tag_reference_type (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void read_tag_const_type (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void read_tag_volatile_type (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void read_tag_string_type (struct die_info *, struct objfile *);
|
||
|
||
static void read_subroutine_type (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static struct die_info *read_comp_unit (char *, bfd *,
|
||
const struct comp_unit_head *);
|
||
|
||
static void free_die_list (struct die_info *);
|
||
|
||
static struct cleanup *make_cleanup_free_die_list (struct die_info *);
|
||
|
||
static void process_die (struct die_info *, struct objfile *,
|
||
const struct comp_unit_head *);
|
||
|
||
static char *dwarf2_linkage_name (struct die_info *);
|
||
|
||
static char *dwarf2_name (struct die_info *die);
|
||
|
||
static struct die_info *dwarf2_extension (struct die_info *die);
|
||
|
||
static char *dwarf_tag_name (unsigned int);
|
||
|
||
static char *dwarf_attr_name (unsigned int);
|
||
|
||
static char *dwarf_form_name (unsigned int);
|
||
|
||
static char *dwarf_stack_op_name (unsigned int);
|
||
|
||
static char *dwarf_bool_name (unsigned int);
|
||
|
||
static char *dwarf_type_encoding_name (unsigned int);
|
||
|
||
#if 0
|
||
static char *dwarf_cfi_name (unsigned int);
|
||
|
||
struct die_info *copy_die (struct die_info *);
|
||
#endif
|
||
|
||
static struct die_info *sibling_die (struct die_info *);
|
||
|
||
static void dump_die (struct die_info *);
|
||
|
||
static void dump_die_list (struct die_info *);
|
||
|
||
static void store_in_ref_table (unsigned int, struct die_info *);
|
||
|
||
static void dwarf2_empty_hash_tables (void);
|
||
|
||
static unsigned int dwarf2_get_ref_die_offset (struct attribute *);
|
||
|
||
static struct die_info *follow_die_ref (unsigned int);
|
||
|
||
static struct type *dwarf2_fundamental_type (struct objfile *, int);
|
||
|
||
/* memory allocation interface */
|
||
|
||
static void dwarf2_free_tmp_obstack (void *);
|
||
|
||
static struct dwarf_block *dwarf_alloc_block (void);
|
||
|
||
static struct abbrev_info *dwarf_alloc_abbrev (void);
|
||
|
||
static struct die_info *dwarf_alloc_die (void);
|
||
|
||
static void initialize_cu_func_list (void);
|
||
|
||
static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR);
|
||
|
||
static void dwarf_decode_macros (struct line_header *, unsigned int,
|
||
char *, bfd *, const struct comp_unit_head *,
|
||
struct objfile *);
|
||
|
||
static int attr_form_is_block (struct attribute *);
|
||
|
||
static void
|
||
dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
|
||
const struct comp_unit_head *,
|
||
struct objfile *objfile);
|
||
|
||
/* Try to locate the sections we need for DWARF 2 debugging
|
||
information and return true if we have enough to do something. */
|
||
|
||
int
|
||
dwarf2_has_info (bfd *abfd)
|
||
{
|
||
dwarf_info_offset = 0;
|
||
dwarf_abbrev_offset = 0;
|
||
dwarf_line_offset = 0;
|
||
dwarf_str_offset = 0;
|
||
dwarf_macinfo_offset = 0;
|
||
dwarf_frame_offset = 0;
|
||
dwarf_eh_frame_offset = 0;
|
||
dwarf_ranges_offset = 0;
|
||
dwarf_loc_offset = 0;
|
||
|
||
bfd_map_over_sections (abfd, dwarf2_locate_sections, NULL);
|
||
if (dwarf_info_offset && dwarf_abbrev_offset)
|
||
{
|
||
return 1;
|
||
}
|
||
else
|
||
{
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
/* This function is mapped across the sections and remembers the
|
||
offset and size of each of the debugging sections we are interested
|
||
in. */
|
||
|
||
static void
|
||
dwarf2_locate_sections (bfd *ignore_abfd, asection *sectp, void *ignore_ptr)
|
||
{
|
||
if (STREQ (sectp->name, INFO_SECTION))
|
||
{
|
||
dwarf_info_offset = sectp->filepos;
|
||
dwarf_info_size = bfd_get_section_size_before_reloc (sectp);
|
||
dwarf_info_section = sectp;
|
||
}
|
||
else if (STREQ (sectp->name, ABBREV_SECTION))
|
||
{
|
||
dwarf_abbrev_offset = sectp->filepos;
|
||
dwarf_abbrev_size = bfd_get_section_size_before_reloc (sectp);
|
||
dwarf_abbrev_section = sectp;
|
||
}
|
||
else if (STREQ (sectp->name, LINE_SECTION))
|
||
{
|
||
dwarf_line_offset = sectp->filepos;
|
||
dwarf_line_size = bfd_get_section_size_before_reloc (sectp);
|
||
dwarf_line_section = sectp;
|
||
}
|
||
else if (STREQ (sectp->name, PUBNAMES_SECTION))
|
||
{
|
||
dwarf_pubnames_offset = sectp->filepos;
|
||
dwarf_pubnames_size = bfd_get_section_size_before_reloc (sectp);
|
||
dwarf_pubnames_section = sectp;
|
||
}
|
||
else if (STREQ (sectp->name, ARANGES_SECTION))
|
||
{
|
||
dwarf_aranges_offset = sectp->filepos;
|
||
dwarf_aranges_size = bfd_get_section_size_before_reloc (sectp);
|
||
dwarf_aranges_section = sectp;
|
||
}
|
||
else if (STREQ (sectp->name, LOC_SECTION))
|
||
{
|
||
dwarf_loc_offset = sectp->filepos;
|
||
dwarf_loc_size = bfd_get_section_size_before_reloc (sectp);
|
||
dwarf_loc_section = sectp;
|
||
}
|
||
else if (STREQ (sectp->name, MACINFO_SECTION))
|
||
{
|
||
dwarf_macinfo_offset = sectp->filepos;
|
||
dwarf_macinfo_size = bfd_get_section_size_before_reloc (sectp);
|
||
dwarf_macinfo_section = sectp;
|
||
}
|
||
else if (STREQ (sectp->name, STR_SECTION))
|
||
{
|
||
dwarf_str_offset = sectp->filepos;
|
||
dwarf_str_size = bfd_get_section_size_before_reloc (sectp);
|
||
dwarf_str_section = sectp;
|
||
}
|
||
else if (STREQ (sectp->name, FRAME_SECTION))
|
||
{
|
||
dwarf_frame_offset = sectp->filepos;
|
||
dwarf_frame_size = bfd_get_section_size_before_reloc (sectp);
|
||
dwarf_frame_section = sectp;
|
||
}
|
||
else if (STREQ (sectp->name, EH_FRAME_SECTION))
|
||
{
|
||
flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
|
||
if (aflag & SEC_HAS_CONTENTS)
|
||
{
|
||
dwarf_eh_frame_offset = sectp->filepos;
|
||
dwarf_eh_frame_size = bfd_get_section_size_before_reloc (sectp);
|
||
dwarf_eh_frame_section = sectp;
|
||
}
|
||
}
|
||
else if (STREQ (sectp->name, RANGES_SECTION))
|
||
{
|
||
dwarf_ranges_offset = sectp->filepos;
|
||
dwarf_ranges_size = bfd_get_section_size_before_reloc (sectp);
|
||
dwarf_ranges_section = sectp;
|
||
}
|
||
}
|
||
|
||
/* Build a partial symbol table. */
|
||
|
||
void
|
||
dwarf2_build_psymtabs (struct objfile *objfile, int mainline)
|
||
{
|
||
|
||
/* We definitely need the .debug_info and .debug_abbrev sections */
|
||
|
||
dwarf_info_buffer = dwarf2_read_section (objfile,
|
||
dwarf_info_offset,
|
||
dwarf_info_size,
|
||
dwarf_info_section);
|
||
dwarf_abbrev_buffer = dwarf2_read_section (objfile,
|
||
dwarf_abbrev_offset,
|
||
dwarf_abbrev_size,
|
||
dwarf_abbrev_section);
|
||
|
||
if (dwarf_line_offset)
|
||
dwarf_line_buffer = dwarf2_read_section (objfile,
|
||
dwarf_line_offset,
|
||
dwarf_line_size,
|
||
dwarf_line_section);
|
||
else
|
||
dwarf_line_buffer = NULL;
|
||
|
||
if (dwarf_str_offset)
|
||
dwarf_str_buffer = dwarf2_read_section (objfile,
|
||
dwarf_str_offset,
|
||
dwarf_str_size,
|
||
dwarf_str_section);
|
||
else
|
||
dwarf_str_buffer = NULL;
|
||
|
||
if (dwarf_macinfo_offset)
|
||
dwarf_macinfo_buffer = dwarf2_read_section (objfile,
|
||
dwarf_macinfo_offset,
|
||
dwarf_macinfo_size,
|
||
dwarf_macinfo_section);
|
||
else
|
||
dwarf_macinfo_buffer = NULL;
|
||
|
||
if (dwarf_ranges_offset)
|
||
dwarf_ranges_buffer = dwarf2_read_section (objfile,
|
||
dwarf_ranges_offset,
|
||
dwarf_ranges_size,
|
||
dwarf_ranges_section);
|
||
else
|
||
dwarf_ranges_buffer = NULL;
|
||
|
||
if (dwarf_loc_offset)
|
||
dwarf_loc_buffer = dwarf2_read_section (objfile,
|
||
dwarf_loc_offset,
|
||
dwarf_loc_size,
|
||
dwarf_loc_section);
|
||
else
|
||
dwarf_loc_buffer = NULL;
|
||
|
||
if (mainline
|
||
|| (objfile->global_psymbols.size == 0
|
||
&& objfile->static_psymbols.size == 0))
|
||
{
|
||
init_psymbol_list (objfile, 1024);
|
||
}
|
||
|
||
#if 0
|
||
if (dwarf_aranges_offset && dwarf_pubnames_offset)
|
||
{
|
||
/* Things are significantly easier if we have .debug_aranges and
|
||
.debug_pubnames sections */
|
||
|
||
dwarf2_build_psymtabs_easy (objfile, mainline);
|
||
}
|
||
else
|
||
#endif
|
||
/* only test this case for now */
|
||
{
|
||
/* In this case we have to work a bit harder */
|
||
dwarf2_build_psymtabs_hard (objfile, mainline);
|
||
}
|
||
}
|
||
|
||
#if 0
|
||
/* Build the partial symbol table from the information in the
|
||
.debug_pubnames and .debug_aranges sections. */
|
||
|
||
static void
|
||
dwarf2_build_psymtabs_easy (struct objfile *objfile, int mainline)
|
||
{
|
||
bfd *abfd = objfile->obfd;
|
||
char *aranges_buffer, *pubnames_buffer;
|
||
char *aranges_ptr, *pubnames_ptr;
|
||
unsigned int entry_length, version, info_offset, info_size;
|
||
|
||
pubnames_buffer = dwarf2_read_section (objfile,
|
||
dwarf_pubnames_offset,
|
||
dwarf_pubnames_size,
|
||
dwarf_pubnames_section);
|
||
pubnames_ptr = pubnames_buffer;
|
||
while ((pubnames_ptr - pubnames_buffer) < dwarf_pubnames_size)
|
||
{
|
||
struct comp_unit_head cu_header;
|
||
int bytes_read;
|
||
|
||
entry_length = read_initial_length (abfd, pubnames_ptr, &cu_header,
|
||
&bytes_read);
|
||
pubnames_ptr += bytes_read;
|
||
version = read_1_byte (abfd, pubnames_ptr);
|
||
pubnames_ptr += 1;
|
||
info_offset = read_4_bytes (abfd, pubnames_ptr);
|
||
pubnames_ptr += 4;
|
||
info_size = read_4_bytes (abfd, pubnames_ptr);
|
||
pubnames_ptr += 4;
|
||
}
|
||
|
||
aranges_buffer = dwarf2_read_section (objfile,
|
||
dwarf_aranges_offset,
|
||
dwarf_aranges_size,
|
||
dwarf_aranges_section);
|
||
|
||
}
|
||
#endif
|
||
|
||
/* Read in the comp unit header information from the debug_info at
|
||
info_ptr. */
|
||
|
||
static char *
|
||
read_comp_unit_head (struct comp_unit_head *cu_header,
|
||
char *info_ptr, bfd *abfd)
|
||
{
|
||
int signed_addr;
|
||
int bytes_read;
|
||
cu_header->length = read_initial_length (abfd, info_ptr, cu_header,
|
||
&bytes_read);
|
||
info_ptr += bytes_read;
|
||
cu_header->version = read_2_bytes (abfd, info_ptr);
|
||
info_ptr += 2;
|
||
cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
|
||
&bytes_read);
|
||
info_ptr += bytes_read;
|
||
cu_header->addr_size = read_1_byte (abfd, info_ptr);
|
||
info_ptr += 1;
|
||
signed_addr = bfd_get_sign_extend_vma (abfd);
|
||
if (signed_addr < 0)
|
||
internal_error (__FILE__, __LINE__,
|
||
"read_comp_unit_head: dwarf from non elf file");
|
||
cu_header->signed_addr_p = signed_addr;
|
||
return info_ptr;
|
||
}
|
||
|
||
/* Build the partial symbol table by doing a quick pass through the
|
||
.debug_info and .debug_abbrev sections. */
|
||
|
||
static void
|
||
dwarf2_build_psymtabs_hard (struct objfile *objfile, int mainline)
|
||
{
|
||
/* Instead of reading this into a big buffer, we should probably use
|
||
mmap() on architectures that support it. (FIXME) */
|
||
bfd *abfd = objfile->obfd;
|
||
char *info_ptr, *abbrev_ptr;
|
||
char *beg_of_comp_unit;
|
||
struct partial_die_info comp_unit_die;
|
||
struct partial_symtab *pst;
|
||
struct cleanup *back_to;
|
||
CORE_ADDR lowpc, highpc;
|
||
|
||
info_ptr = dwarf_info_buffer;
|
||
abbrev_ptr = dwarf_abbrev_buffer;
|
||
|
||
/* We use dwarf2_tmp_obstack for objects that don't need to survive
|
||
the partial symbol scan, like attribute values.
|
||
|
||
We could reduce our peak memory consumption during partial symbol
|
||
table construction by freeing stuff from this obstack more often
|
||
--- say, after processing each compilation unit, or each die ---
|
||
but it turns out that this saves almost nothing. For an
|
||
executable with 11Mb of Dwarf 2 data, I found about 64k allocated
|
||
on dwarf2_tmp_obstack. Some investigation showed:
|
||
|
||
1) 69% of the attributes used forms DW_FORM_addr, DW_FORM_data*,
|
||
DW_FORM_flag, DW_FORM_[su]data, and DW_FORM_ref*. These are
|
||
all fixed-length values not requiring dynamic allocation.
|
||
|
||
2) 30% of the attributes used the form DW_FORM_string. For
|
||
DW_FORM_string, read_attribute simply hands back a pointer to
|
||
the null-terminated string in dwarf_info_buffer, so no dynamic
|
||
allocation is needed there either.
|
||
|
||
3) The remaining 1% of the attributes all used DW_FORM_block1.
|
||
75% of those were DW_AT_frame_base location lists for
|
||
functions; the rest were DW_AT_location attributes, probably
|
||
for the global variables.
|
||
|
||
Anyway, what this all means is that the memory the dwarf2
|
||
reader uses as temporary space reading partial symbols is about
|
||
0.5% as much as we use for dwarf_*_buffer. That's noise. */
|
||
|
||
obstack_init (&dwarf2_tmp_obstack);
|
||
back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL);
|
||
|
||
/* Since the objects we're extracting from dwarf_info_buffer vary in
|
||
length, only the individual functions to extract them (like
|
||
read_comp_unit_head and read_partial_die) can really know whether
|
||
the buffer is large enough to hold another complete object.
|
||
|
||
At the moment, they don't actually check that. If
|
||
dwarf_info_buffer holds just one extra byte after the last
|
||
compilation unit's dies, then read_comp_unit_head will happily
|
||
read off the end of the buffer. read_partial_die is similarly
|
||
casual. Those functions should be fixed.
|
||
|
||
For this loop condition, simply checking whether there's any data
|
||
left at all should be sufficient. */
|
||
while (info_ptr < dwarf_info_buffer + dwarf_info_size)
|
||
{
|
||
struct comp_unit_head cu_header;
|
||
beg_of_comp_unit = info_ptr;
|
||
info_ptr = read_comp_unit_head (&cu_header, info_ptr, abfd);
|
||
|
||
if (cu_header.version != 2)
|
||
{
|
||
error ("Dwarf Error: wrong version in compilation unit header (is %d, should be %d) [in module %s]", cu_header.version, 2, bfd_get_filename (abfd));
|
||
return;
|
||
}
|
||
if (cu_header.abbrev_offset >= dwarf_abbrev_size)
|
||
{
|
||
error ("Dwarf Error: bad offset (0x%lx) in compilation unit header (offset 0x%lx + 6) [in module %s]",
|
||
(long) cu_header.abbrev_offset,
|
||
(long) (beg_of_comp_unit - dwarf_info_buffer),
|
||
bfd_get_filename (abfd));
|
||
return;
|
||
}
|
||
if (beg_of_comp_unit + cu_header.length + cu_header.initial_length_size
|
||
> dwarf_info_buffer + dwarf_info_size)
|
||
{
|
||
error ("Dwarf Error: bad length (0x%lx) in compilation unit header (offset 0x%lx + 0) [in module %s]",
|
||
(long) cu_header.length,
|
||
(long) (beg_of_comp_unit - dwarf_info_buffer),
|
||
bfd_get_filename (abfd));
|
||
return;
|
||
}
|
||
/* Complete the cu_header */
|
||
cu_header.offset = beg_of_comp_unit - dwarf_info_buffer;
|
||
cu_header.first_die_ptr = info_ptr;
|
||
cu_header.cu_head_ptr = beg_of_comp_unit;
|
||
|
||
/* Read the abbrevs for this compilation unit into a table */
|
||
dwarf2_read_abbrevs (abfd, &cu_header);
|
||
make_cleanup (dwarf2_empty_abbrev_table, cu_header.dwarf2_abbrevs);
|
||
|
||
/* Read the compilation unit die */
|
||
info_ptr = read_partial_die (&comp_unit_die, abfd, info_ptr,
|
||
&cu_header);
|
||
|
||
/* Set the language we're debugging */
|
||
set_cu_language (comp_unit_die.language);
|
||
|
||
/* Allocate a new partial symbol table structure */
|
||
pst = start_psymtab_common (objfile, objfile->section_offsets,
|
||
comp_unit_die.name ? comp_unit_die.name : "",
|
||
comp_unit_die.lowpc,
|
||
objfile->global_psymbols.next,
|
||
objfile->static_psymbols.next);
|
||
|
||
pst->read_symtab_private = (char *)
|
||
obstack_alloc (&objfile->psymbol_obstack, sizeof (struct dwarf2_pinfo));
|
||
cu_header_offset = beg_of_comp_unit - dwarf_info_buffer;
|
||
DWARF_INFO_BUFFER (pst) = dwarf_info_buffer;
|
||
DWARF_INFO_OFFSET (pst) = beg_of_comp_unit - dwarf_info_buffer;
|
||
DWARF_ABBREV_BUFFER (pst) = dwarf_abbrev_buffer;
|
||
DWARF_ABBREV_SIZE (pst) = dwarf_abbrev_size;
|
||
DWARF_LINE_BUFFER (pst) = dwarf_line_buffer;
|
||
DWARF_LINE_SIZE (pst) = dwarf_line_size;
|
||
DWARF_STR_BUFFER (pst) = dwarf_str_buffer;
|
||
DWARF_STR_SIZE (pst) = dwarf_str_size;
|
||
DWARF_MACINFO_BUFFER (pst) = dwarf_macinfo_buffer;
|
||
DWARF_MACINFO_SIZE (pst) = dwarf_macinfo_size;
|
||
DWARF_RANGES_BUFFER (pst) = dwarf_ranges_buffer;
|
||
DWARF_RANGES_SIZE (pst) = dwarf_ranges_size;
|
||
DWARF_LOC_BUFFER (pst) = dwarf_loc_buffer;
|
||
DWARF_LOC_SIZE (pst) = dwarf_loc_size;
|
||
baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
|
||
|
||
/* Store the function that reads in the rest of the symbol table */
|
||
pst->read_symtab = dwarf2_psymtab_to_symtab;
|
||
|
||
/* Check if comp unit has_children.
|
||
If so, read the rest of the partial symbols from this comp unit.
|
||
If not, there's no more debug_info for this comp unit. */
|
||
if (comp_unit_die.has_children)
|
||
{
|
||
info_ptr = scan_partial_symbols (info_ptr, objfile, &lowpc, &highpc,
|
||
&cu_header);
|
||
|
||
/* If the compilation unit didn't have an explicit address range,
|
||
then use the information extracted from its child dies. */
|
||
if (! comp_unit_die.has_pc_info)
|
||
{
|
||
comp_unit_die.lowpc = lowpc;
|
||
comp_unit_die.highpc = highpc;
|
||
}
|
||
}
|
||
pst->textlow = comp_unit_die.lowpc + baseaddr;
|
||
pst->texthigh = comp_unit_die.highpc + baseaddr;
|
||
|
||
pst->n_global_syms = objfile->global_psymbols.next -
|
||
(objfile->global_psymbols.list + pst->globals_offset);
|
||
pst->n_static_syms = objfile->static_psymbols.next -
|
||
(objfile->static_psymbols.list + pst->statics_offset);
|
||
sort_pst_symbols (pst);
|
||
|
||
/* If there is already a psymtab or symtab for a file of this
|
||
name, remove it. (If there is a symtab, more drastic things
|
||
also happen.) This happens in VxWorks. */
|
||
free_named_symtabs (pst->filename);
|
||
|
||
info_ptr = beg_of_comp_unit + cu_header.length
|
||
+ cu_header.initial_length_size;
|
||
}
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
/* Read in all interesting dies to the end of the compilation unit. */
|
||
|
||
static char *
|
||
scan_partial_symbols (char *info_ptr, struct objfile *objfile,
|
||
CORE_ADDR *lowpc, CORE_ADDR *highpc,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
bfd *abfd = objfile->obfd;
|
||
struct partial_die_info pdi;
|
||
|
||
/* This function is called after we've read in the comp_unit_die in
|
||
order to read its children. We start the nesting level at 1 since
|
||
we have pushed 1 level down in order to read the comp unit's children.
|
||
The comp unit itself is at level 0, so we stop reading when we pop
|
||
back to that level. */
|
||
|
||
int nesting_level = 1;
|
||
|
||
/* We only want to read in symbols corresponding to variables or
|
||
other similar objects that are global or static. Normally, these
|
||
are all children of the DW_TAG_compile_unit die, so are all at
|
||
level 1. But C++ namespaces give ries to DW_TAG_namespace dies
|
||
whose children are global objects. So we keep track of what
|
||
level we currently think of as referring to file scope; this
|
||
should always equal 1 plus the number of namespaces that we are
|
||
currently nested within. */
|
||
|
||
int file_scope_level = 1;
|
||
|
||
*lowpc = ((CORE_ADDR) -1);
|
||
*highpc = ((CORE_ADDR) 0);
|
||
|
||
while (nesting_level)
|
||
{
|
||
info_ptr = read_partial_die (&pdi, abfd, info_ptr, cu_header);
|
||
|
||
/* Anonymous namespaces have no name but are interesting. */
|
||
|
||
if (pdi.name != NULL || pdi.tag == DW_TAG_namespace)
|
||
{
|
||
switch (pdi.tag)
|
||
{
|
||
case DW_TAG_subprogram:
|
||
if (pdi.has_pc_info)
|
||
{
|
||
if (pdi.lowpc < *lowpc)
|
||
{
|
||
*lowpc = pdi.lowpc;
|
||
}
|
||
if (pdi.highpc > *highpc)
|
||
{
|
||
*highpc = pdi.highpc;
|
||
}
|
||
if ((pdi.is_external || nesting_level == file_scope_level)
|
||
&& !pdi.is_declaration)
|
||
{
|
||
add_partial_symbol (&pdi, objfile, cu_header);
|
||
}
|
||
}
|
||
break;
|
||
case DW_TAG_variable:
|
||
case DW_TAG_typedef:
|
||
case DW_TAG_class_type:
|
||
case DW_TAG_structure_type:
|
||
case DW_TAG_union_type:
|
||
case DW_TAG_enumeration_type:
|
||
if ((pdi.is_external || nesting_level == file_scope_level)
|
||
&& !pdi.is_declaration)
|
||
{
|
||
add_partial_symbol (&pdi, objfile, cu_header);
|
||
}
|
||
break;
|
||
case DW_TAG_enumerator:
|
||
/* File scope enumerators are added to the partial
|
||
symbol table. They're children of the enumeration
|
||
type die, so they occur at a level one higher than we
|
||
normally look for. */
|
||
if (nesting_level == file_scope_level + 1)
|
||
add_partial_symbol (&pdi, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_base_type:
|
||
/* File scope base type definitions are added to the partial
|
||
symbol table. */
|
||
if (nesting_level == file_scope_level)
|
||
add_partial_symbol (&pdi, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_namespace:
|
||
/* FIXME: carlton/2002-10-16: we're not yet doing
|
||
anything useful with this, but for now make sure that
|
||
these tags at least don't cause us to miss any
|
||
important symbols. */
|
||
if (pdi.has_children)
|
||
file_scope_level++;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* If the die has a sibling, skip to the sibling. Do not skip
|
||
enumeration types, we want to record their enumerators. Do
|
||
not skip namespaces, we want to record symbols inside
|
||
them. */
|
||
if (pdi.sibling
|
||
&& pdi.tag != DW_TAG_enumeration_type
|
||
&& pdi.tag != DW_TAG_namespace)
|
||
{
|
||
info_ptr = pdi.sibling;
|
||
}
|
||
else if (pdi.has_children)
|
||
{
|
||
/* Die has children, but either the optional DW_AT_sibling
|
||
attribute is missing or we want to look at them. */
|
||
nesting_level++;
|
||
}
|
||
|
||
if (pdi.tag == 0)
|
||
{
|
||
nesting_level--;
|
||
/* If this is the end of a DW_TAG_namespace entry, then
|
||
decrease the file_scope_level, too. */
|
||
if (nesting_level < file_scope_level)
|
||
{
|
||
file_scope_level--;
|
||
gdb_assert (nesting_level == file_scope_level);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* If we didn't find a lowpc, set it to highpc to avoid complaints
|
||
from `maint check'. */
|
||
if (*lowpc == ((CORE_ADDR) -1))
|
||
*lowpc = *highpc;
|
||
return info_ptr;
|
||
}
|
||
|
||
static void
|
||
add_partial_symbol (struct partial_die_info *pdi, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
CORE_ADDR addr = 0;
|
||
|
||
switch (pdi->tag)
|
||
{
|
||
case DW_TAG_subprogram:
|
||
if (pdi->is_external)
|
||
{
|
||
/*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
|
||
mst_text, objfile); */
|
||
add_psymbol_to_list (pdi->name, strlen (pdi->name),
|
||
VAR_DOMAIN, LOC_BLOCK,
|
||
&objfile->global_psymbols,
|
||
0, pdi->lowpc + baseaddr, cu_language, objfile);
|
||
}
|
||
else
|
||
{
|
||
/*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
|
||
mst_file_text, objfile); */
|
||
add_psymbol_to_list (pdi->name, strlen (pdi->name),
|
||
VAR_DOMAIN, LOC_BLOCK,
|
||
&objfile->static_psymbols,
|
||
0, pdi->lowpc + baseaddr, cu_language, objfile);
|
||
}
|
||
break;
|
||
case DW_TAG_variable:
|
||
if (pdi->is_external)
|
||
{
|
||
/* Global Variable.
|
||
Don't enter into the minimal symbol tables as there is
|
||
a minimal symbol table entry from the ELF symbols already.
|
||
Enter into partial symbol table if it has a location
|
||
descriptor or a type.
|
||
If the location descriptor is missing, new_symbol will create
|
||
a LOC_UNRESOLVED symbol, the address of the variable will then
|
||
be determined from the minimal symbol table whenever the variable
|
||
is referenced.
|
||
The address for the partial symbol table entry is not
|
||
used by GDB, but it comes in handy for debugging partial symbol
|
||
table building. */
|
||
|
||
if (pdi->locdesc)
|
||
addr = decode_locdesc (pdi->locdesc, objfile, cu_header);
|
||
if (pdi->locdesc || pdi->has_type)
|
||
add_psymbol_to_list (pdi->name, strlen (pdi->name),
|
||
VAR_DOMAIN, LOC_STATIC,
|
||
&objfile->global_psymbols,
|
||
0, addr + baseaddr, cu_language, objfile);
|
||
}
|
||
else
|
||
{
|
||
/* Static Variable. Skip symbols without location descriptors. */
|
||
if (pdi->locdesc == NULL)
|
||
return;
|
||
addr = decode_locdesc (pdi->locdesc, objfile, cu_header);
|
||
/*prim_record_minimal_symbol (pdi->name, addr + baseaddr,
|
||
mst_file_data, objfile); */
|
||
add_psymbol_to_list (pdi->name, strlen (pdi->name),
|
||
VAR_DOMAIN, LOC_STATIC,
|
||
&objfile->static_psymbols,
|
||
0, addr + baseaddr, cu_language, objfile);
|
||
}
|
||
break;
|
||
case DW_TAG_typedef:
|
||
case DW_TAG_base_type:
|
||
add_psymbol_to_list (pdi->name, strlen (pdi->name),
|
||
VAR_DOMAIN, LOC_TYPEDEF,
|
||
&objfile->static_psymbols,
|
||
0, (CORE_ADDR) 0, cu_language, objfile);
|
||
break;
|
||
case DW_TAG_class_type:
|
||
case DW_TAG_structure_type:
|
||
case DW_TAG_union_type:
|
||
case DW_TAG_enumeration_type:
|
||
/* Skip aggregate types without children, these are external
|
||
references. */
|
||
if (pdi->has_children == 0)
|
||
return;
|
||
add_psymbol_to_list (pdi->name, strlen (pdi->name),
|
||
STRUCT_DOMAIN, LOC_TYPEDEF,
|
||
&objfile->static_psymbols,
|
||
0, (CORE_ADDR) 0, cu_language, objfile);
|
||
|
||
if (cu_language == language_cplus)
|
||
{
|
||
/* For C++, these implicitly act as typedefs as well. */
|
||
add_psymbol_to_list (pdi->name, strlen (pdi->name),
|
||
VAR_DOMAIN, LOC_TYPEDEF,
|
||
&objfile->static_psymbols,
|
||
0, (CORE_ADDR) 0, cu_language, objfile);
|
||
}
|
||
break;
|
||
case DW_TAG_enumerator:
|
||
add_psymbol_to_list (pdi->name, strlen (pdi->name),
|
||
VAR_DOMAIN, LOC_CONST,
|
||
&objfile->static_psymbols,
|
||
0, (CORE_ADDR) 0, cu_language, objfile);
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Expand this partial symbol table into a full symbol table. */
|
||
|
||
static void
|
||
dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
|
||
{
|
||
/* FIXME: This is barely more than a stub. */
|
||
if (pst != NULL)
|
||
{
|
||
if (pst->readin)
|
||
{
|
||
warning ("bug: psymtab for %s is already read in.", pst->filename);
|
||
}
|
||
else
|
||
{
|
||
if (info_verbose)
|
||
{
|
||
printf_filtered ("Reading in symbols for %s...", pst->filename);
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
|
||
psymtab_to_symtab_1 (pst);
|
||
|
||
/* Finish up the debug error message. */
|
||
if (info_verbose)
|
||
printf_filtered ("done.\n");
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
psymtab_to_symtab_1 (struct partial_symtab *pst)
|
||
{
|
||
struct objfile *objfile = pst->objfile;
|
||
bfd *abfd = objfile->obfd;
|
||
struct comp_unit_head cu_header;
|
||
struct die_info *dies;
|
||
unsigned long offset;
|
||
CORE_ADDR lowpc, highpc;
|
||
struct die_info *child_die;
|
||
char *info_ptr;
|
||
struct symtab *symtab;
|
||
struct cleanup *back_to;
|
||
struct attribute *attr;
|
||
|
||
/* Set local variables from the partial symbol table info. */
|
||
offset = DWARF_INFO_OFFSET (pst);
|
||
dwarf_info_buffer = DWARF_INFO_BUFFER (pst);
|
||
dwarf_abbrev_buffer = DWARF_ABBREV_BUFFER (pst);
|
||
dwarf_abbrev_size = DWARF_ABBREV_SIZE (pst);
|
||
dwarf_line_buffer = DWARF_LINE_BUFFER (pst);
|
||
dwarf_line_size = DWARF_LINE_SIZE (pst);
|
||
dwarf_str_buffer = DWARF_STR_BUFFER (pst);
|
||
dwarf_str_size = DWARF_STR_SIZE (pst);
|
||
dwarf_macinfo_buffer = DWARF_MACINFO_BUFFER (pst);
|
||
dwarf_macinfo_size = DWARF_MACINFO_SIZE (pst);
|
||
dwarf_ranges_buffer = DWARF_RANGES_BUFFER (pst);
|
||
dwarf_ranges_size = DWARF_RANGES_SIZE (pst);
|
||
dwarf_loc_buffer = DWARF_LOC_BUFFER (pst);
|
||
dwarf_loc_size = DWARF_LOC_SIZE (pst);
|
||
baseaddr = ANOFFSET (pst->section_offsets, SECT_OFF_TEXT (objfile));
|
||
cu_header_offset = offset;
|
||
info_ptr = dwarf_info_buffer + offset;
|
||
|
||
obstack_init (&dwarf2_tmp_obstack);
|
||
back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL);
|
||
|
||
buildsym_init ();
|
||
make_cleanup (really_free_pendings, NULL);
|
||
|
||
/* read in the comp_unit header */
|
||
info_ptr = read_comp_unit_head (&cu_header, info_ptr, abfd);
|
||
|
||
/* Read the abbrevs for this compilation unit */
|
||
dwarf2_read_abbrevs (abfd, &cu_header);
|
||
make_cleanup (dwarf2_empty_abbrev_table, cu_header.dwarf2_abbrevs);
|
||
|
||
dies = read_comp_unit (info_ptr, abfd, &cu_header);
|
||
|
||
make_cleanup_free_die_list (dies);
|
||
|
||
/* Find the base address of the compilation unit for range lists and
|
||
location lists. It will normally be specified by DW_AT_low_pc.
|
||
In DWARF-3 draft 4, the base address could be overridden by
|
||
DW_AT_entry_pc. It's been removed, but GCC still uses this for
|
||
compilation units with discontinuous ranges. */
|
||
|
||
cu_header.base_known = 0;
|
||
cu_header.base_address = 0;
|
||
|
||
attr = dwarf_attr (dies, DW_AT_entry_pc);
|
||
if (attr)
|
||
{
|
||
cu_header.base_address = DW_ADDR (attr);
|
||
cu_header.base_known = 1;
|
||
}
|
||
else
|
||
{
|
||
attr = dwarf_attr (dies, DW_AT_low_pc);
|
||
if (attr)
|
||
{
|
||
cu_header.base_address = DW_ADDR (attr);
|
||
cu_header.base_known = 1;
|
||
}
|
||
}
|
||
|
||
/* Do line number decoding in read_file_scope () */
|
||
process_die (dies, objfile, &cu_header);
|
||
|
||
if (!dwarf2_get_pc_bounds (dies, &lowpc, &highpc, objfile, &cu_header))
|
||
{
|
||
/* Some compilers don't define a DW_AT_high_pc attribute for
|
||
the compilation unit. If the DW_AT_high_pc is missing,
|
||
synthesize it, by scanning the DIE's below the compilation unit. */
|
||
highpc = 0;
|
||
if (dies->has_children)
|
||
{
|
||
child_die = dies->next;
|
||
while (child_die && child_die->tag)
|
||
{
|
||
if (child_die->tag == DW_TAG_subprogram)
|
||
{
|
||
CORE_ADDR low, high;
|
||
|
||
if (dwarf2_get_pc_bounds (child_die, &low, &high,
|
||
objfile, &cu_header))
|
||
{
|
||
highpc = max (highpc, high);
|
||
}
|
||
}
|
||
child_die = sibling_die (child_die);
|
||
}
|
||
}
|
||
}
|
||
symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
|
||
|
||
/* Set symtab language to language from DW_AT_language.
|
||
If the compilation is from a C file generated by language preprocessors,
|
||
do not set the language if it was already deduced by start_subfile. */
|
||
if (symtab != NULL
|
||
&& !(cu_language == language_c && symtab->language != language_c))
|
||
{
|
||
symtab->language = cu_language;
|
||
}
|
||
pst->symtab = symtab;
|
||
pst->readin = 1;
|
||
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
/* Process a die and its children. */
|
||
|
||
static void
|
||
process_die (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
switch (die->tag)
|
||
{
|
||
case DW_TAG_padding:
|
||
break;
|
||
case DW_TAG_compile_unit:
|
||
read_file_scope (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_subprogram:
|
||
read_subroutine_type (die, objfile, cu_header);
|
||
read_func_scope (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_inlined_subroutine:
|
||
/* FIXME: These are ignored for now.
|
||
They could be used to set breakpoints on all inlined instances
|
||
of a function and make GDB `next' properly over inlined functions. */
|
||
break;
|
||
case DW_TAG_lexical_block:
|
||
case DW_TAG_try_block:
|
||
case DW_TAG_catch_block:
|
||
read_lexical_block_scope (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_class_type:
|
||
case DW_TAG_structure_type:
|
||
case DW_TAG_union_type:
|
||
read_structure_scope (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_enumeration_type:
|
||
read_enumeration (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_subroutine_type:
|
||
read_subroutine_type (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_array_type:
|
||
read_array_type (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_pointer_type:
|
||
read_tag_pointer_type (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_ptr_to_member_type:
|
||
read_tag_ptr_to_member_type (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_reference_type:
|
||
read_tag_reference_type (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_string_type:
|
||
read_tag_string_type (die, objfile);
|
||
break;
|
||
case DW_TAG_base_type:
|
||
read_base_type (die, objfile);
|
||
if (dwarf_attr (die, DW_AT_name))
|
||
{
|
||
/* Add a typedef symbol for the base type definition. */
|
||
new_symbol (die, die->type, objfile, cu_header);
|
||
}
|
||
break;
|
||
case DW_TAG_common_block:
|
||
read_common_block (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_common_inclusion:
|
||
break;
|
||
case DW_TAG_namespace:
|
||
if (!processing_has_namespace_info)
|
||
{
|
||
processing_has_namespace_info = 1;
|
||
processing_current_namespace = "";
|
||
}
|
||
read_namespace (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_imported_declaration:
|
||
case DW_TAG_imported_module:
|
||
/* FIXME: carlton/2002-10-16: Eventually, we should use the
|
||
information contained in these. DW_TAG_imported_declaration
|
||
dies shouldn't have children; DW_TAG_imported_module dies
|
||
shouldn't in the C++ case, but conceivably could in the
|
||
Fortran case, so we'll have to replace this gdb_assert if
|
||
Fortran compilers start generating that info. */
|
||
if (!processing_has_namespace_info)
|
||
{
|
||
processing_has_namespace_info = 1;
|
||
processing_current_namespace = "";
|
||
}
|
||
gdb_assert (!die->has_children);
|
||
break;
|
||
default:
|
||
new_symbol (die, NULL, objfile, cu_header);
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void
|
||
initialize_cu_func_list (void)
|
||
{
|
||
cu_first_fn = cu_last_fn = cu_cached_fn = NULL;
|
||
}
|
||
|
||
static void
|
||
read_file_scope (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct cleanup *back_to = make_cleanup (null_cleanup, 0);
|
||
CORE_ADDR lowpc = ((CORE_ADDR) -1);
|
||
CORE_ADDR highpc = ((CORE_ADDR) 0);
|
||
struct attribute *attr;
|
||
char *name = "<unknown>";
|
||
char *comp_dir = NULL;
|
||
struct die_info *child_die;
|
||
bfd *abfd = objfile->obfd;
|
||
struct line_header *line_header = 0;
|
||
|
||
if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile, cu_header))
|
||
{
|
||
if (die->has_children)
|
||
{
|
||
child_die = die->next;
|
||
while (child_die && child_die->tag)
|
||
{
|
||
if (child_die->tag == DW_TAG_subprogram)
|
||
{
|
||
CORE_ADDR low, high;
|
||
|
||
if (dwarf2_get_pc_bounds (child_die, &low, &high,
|
||
objfile, cu_header))
|
||
{
|
||
lowpc = min (lowpc, low);
|
||
highpc = max (highpc, high);
|
||
}
|
||
}
|
||
child_die = sibling_die (child_die);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* If we didn't find a lowpc, set it to highpc to avoid complaints
|
||
from finish_block. */
|
||
if (lowpc == ((CORE_ADDR) -1))
|
||
lowpc = highpc;
|
||
lowpc += baseaddr;
|
||
highpc += baseaddr;
|
||
|
||
attr = dwarf_attr (die, DW_AT_name);
|
||
if (attr)
|
||
{
|
||
name = DW_STRING (attr);
|
||
}
|
||
attr = dwarf_attr (die, DW_AT_comp_dir);
|
||
if (attr)
|
||
{
|
||
comp_dir = DW_STRING (attr);
|
||
if (comp_dir)
|
||
{
|
||
/* Irix 6.2 native cc prepends <machine>.: to the compilation
|
||
directory, get rid of it. */
|
||
char *cp = strchr (comp_dir, ':');
|
||
|
||
if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
|
||
comp_dir = cp + 1;
|
||
}
|
||
}
|
||
|
||
if (objfile->ei.entry_point >= lowpc &&
|
||
objfile->ei.entry_point < highpc)
|
||
{
|
||
objfile->ei.entry_file_lowpc = lowpc;
|
||
objfile->ei.entry_file_highpc = highpc;
|
||
}
|
||
|
||
attr = dwarf_attr (die, DW_AT_language);
|
||
if (attr)
|
||
{
|
||
set_cu_language (DW_UNSND (attr));
|
||
}
|
||
|
||
/* We assume that we're processing GCC output. */
|
||
processing_gcc_compilation = 2;
|
||
#if 0
|
||
/* FIXME:Do something here. */
|
||
if (dip->at_producer != NULL)
|
||
{
|
||
handle_producer (dip->at_producer);
|
||
}
|
||
#endif
|
||
|
||
/* The compilation unit may be in a different language or objfile,
|
||
zero out all remembered fundamental types. */
|
||
memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *));
|
||
|
||
start_symtab (name, comp_dir, lowpc);
|
||
record_debugformat ("DWARF 2");
|
||
|
||
initialize_cu_func_list ();
|
||
|
||
/* Process all dies in compilation unit. */
|
||
if (die->has_children)
|
||
{
|
||
child_die = die->next;
|
||
while (child_die && child_die->tag)
|
||
{
|
||
process_die (child_die, objfile, cu_header);
|
||
child_die = sibling_die (child_die);
|
||
}
|
||
}
|
||
|
||
/* Decode line number information if present. */
|
||
attr = dwarf_attr (die, DW_AT_stmt_list);
|
||
if (attr)
|
||
{
|
||
unsigned int line_offset = DW_UNSND (attr);
|
||
line_header = dwarf_decode_line_header (line_offset,
|
||
abfd, cu_header);
|
||
if (line_header)
|
||
{
|
||
make_cleanup ((make_cleanup_ftype *) free_line_header,
|
||
(void *) line_header);
|
||
dwarf_decode_lines (line_header, comp_dir, abfd, cu_header);
|
||
}
|
||
}
|
||
|
||
/* Decode macro information, if present. Dwarf 2 macro information
|
||
refers to information in the line number info statement program
|
||
header, so we can only read it if we've read the header
|
||
successfully. */
|
||
attr = dwarf_attr (die, DW_AT_macro_info);
|
||
if (attr && line_header)
|
||
{
|
||
unsigned int macro_offset = DW_UNSND (attr);
|
||
dwarf_decode_macros (line_header, macro_offset,
|
||
comp_dir, abfd, cu_header, objfile);
|
||
}
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
static void
|
||
add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc)
|
||
{
|
||
struct function_range *thisfn;
|
||
|
||
thisfn = (struct function_range *)
|
||
obstack_alloc (&dwarf2_tmp_obstack, sizeof (struct function_range));
|
||
thisfn->name = name;
|
||
thisfn->lowpc = lowpc;
|
||
thisfn->highpc = highpc;
|
||
thisfn->seen_line = 0;
|
||
thisfn->next = NULL;
|
||
|
||
if (cu_last_fn == NULL)
|
||
cu_first_fn = thisfn;
|
||
else
|
||
cu_last_fn->next = thisfn;
|
||
|
||
cu_last_fn = thisfn;
|
||
}
|
||
|
||
static void
|
||
read_func_scope (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
register struct context_stack *new;
|
||
CORE_ADDR lowpc;
|
||
CORE_ADDR highpc;
|
||
struct die_info *child_die;
|
||
struct attribute *attr;
|
||
char *name;
|
||
|
||
name = dwarf2_linkage_name (die);
|
||
|
||
/* Ignore functions with missing or empty names and functions with
|
||
missing or invalid low and high pc attributes. */
|
||
if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile, cu_header))
|
||
return;
|
||
|
||
lowpc += baseaddr;
|
||
highpc += baseaddr;
|
||
|
||
/* Record the function range for dwarf_decode_lines. */
|
||
add_to_cu_func_list (name, lowpc, highpc);
|
||
|
||
if (objfile->ei.entry_point >= lowpc &&
|
||
objfile->ei.entry_point < highpc)
|
||
{
|
||
objfile->ei.entry_func_lowpc = lowpc;
|
||
objfile->ei.entry_func_highpc = highpc;
|
||
}
|
||
|
||
/* Decode DW_AT_frame_base location descriptor if present, keep result
|
||
for DW_OP_fbreg operands in decode_locdesc. */
|
||
frame_base_reg = -1;
|
||
frame_base_offset = 0;
|
||
attr = dwarf_attr (die, DW_AT_frame_base);
|
||
if (attr)
|
||
{
|
||
CORE_ADDR addr;
|
||
|
||
/* Support the .debug_loc offsets */
|
||
if (attr_form_is_block (attr))
|
||
{
|
||
addr = decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
|
||
}
|
||
else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
|
||
{
|
||
dwarf2_complex_location_expr_complaint ();
|
||
addr = 0;
|
||
}
|
||
else
|
||
{
|
||
dwarf2_invalid_attrib_class_complaint ("DW_AT_frame_base", name);
|
||
addr = 0;
|
||
}
|
||
|
||
if (isderef)
|
||
dwarf2_unsupported_at_frame_base_complaint (name);
|
||
else if (isreg)
|
||
frame_base_reg = addr;
|
||
else if (offreg)
|
||
{
|
||
frame_base_reg = basereg;
|
||
frame_base_offset = addr;
|
||
}
|
||
else
|
||
dwarf2_unsupported_at_frame_base_complaint (name);
|
||
}
|
||
|
||
new = push_context (0, lowpc);
|
||
new->name = new_symbol (die, die->type, objfile, cu_header);
|
||
|
||
/* If there was a location expression for DW_AT_frame_base above,
|
||
record it. We still need to decode it above because not all
|
||
symbols use location expressions exclusively. */
|
||
if (attr)
|
||
dwarf2_symbol_mark_computed (attr, new->name, cu_header, objfile);
|
||
|
||
list_in_scope = &local_symbols;
|
||
|
||
if (die->has_children)
|
||
{
|
||
child_die = die->next;
|
||
while (child_die && child_die->tag)
|
||
{
|
||
process_die (child_die, objfile, cu_header);
|
||
child_die = sibling_die (child_die);
|
||
}
|
||
}
|
||
|
||
new = pop_context ();
|
||
/* Make a block for the local symbols within. */
|
||
finish_block (new->name, &local_symbols, new->old_blocks,
|
||
lowpc, highpc, objfile);
|
||
|
||
/* In C++, we can have functions nested inside functions (e.g., when
|
||
a function declares a class that has methods). This means that
|
||
when we finish processing a function scope, we may need to go
|
||
back to building a containing block's symbol lists. */
|
||
local_symbols = new->locals;
|
||
param_symbols = new->params;
|
||
|
||
/* If we've finished processing a top-level function, subsequent
|
||
symbols go in the file symbol list. */
|
||
if (outermost_context_p ())
|
||
list_in_scope = &file_symbols;
|
||
}
|
||
|
||
/* Process all the DIES contained within a lexical block scope. Start
|
||
a new scope, process the dies, and then close the scope. */
|
||
|
||
static void
|
||
read_lexical_block_scope (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
register struct context_stack *new;
|
||
CORE_ADDR lowpc, highpc;
|
||
struct die_info *child_die;
|
||
|
||
/* Ignore blocks with missing or invalid low and high pc attributes. */
|
||
/* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
|
||
as multiple lexical blocks? Handling children in a sane way would
|
||
be nasty. Might be easier to properly extend generic blocks to
|
||
describe ranges. */
|
||
if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile, cu_header))
|
||
return;
|
||
lowpc += baseaddr;
|
||
highpc += baseaddr;
|
||
|
||
push_context (0, lowpc);
|
||
if (die->has_children)
|
||
{
|
||
child_die = die->next;
|
||
while (child_die && child_die->tag)
|
||
{
|
||
process_die (child_die, objfile, cu_header);
|
||
child_die = sibling_die (child_die);
|
||
}
|
||
}
|
||
new = pop_context ();
|
||
|
||
if (local_symbols != NULL)
|
||
{
|
||
finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
|
||
highpc, objfile);
|
||
}
|
||
local_symbols = new->locals;
|
||
}
|
||
|
||
/* Get low and high pc attributes from a die. Return 1 if the attributes
|
||
are present and valid, otherwise, return 0. Return -1 if the range is
|
||
discontinuous, i.e. derived from DW_AT_ranges information. */
|
||
static int
|
||
dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
|
||
CORE_ADDR *highpc, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct attribute *attr;
|
||
bfd *obfd = objfile->obfd;
|
||
CORE_ADDR low = 0;
|
||
CORE_ADDR high = 0;
|
||
int ret = 0;
|
||
|
||
attr = dwarf_attr (die, DW_AT_high_pc);
|
||
if (attr)
|
||
{
|
||
high = DW_ADDR (attr);
|
||
attr = dwarf_attr (die, DW_AT_low_pc);
|
||
if (attr)
|
||
low = DW_ADDR (attr);
|
||
else
|
||
/* Found high w/o low attribute. */
|
||
return 0;
|
||
|
||
/* Found consecutive range of addresses. */
|
||
ret = 1;
|
||
}
|
||
else
|
||
{
|
||
attr = dwarf_attr (die, DW_AT_ranges);
|
||
if (attr != NULL)
|
||
{
|
||
unsigned int addr_size = cu_header->addr_size;
|
||
CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
|
||
/* Value of the DW_AT_ranges attribute is the offset in the
|
||
.debug_renges section. */
|
||
unsigned int offset = DW_UNSND (attr);
|
||
/* Base address selection entry. */
|
||
CORE_ADDR base;
|
||
int found_base;
|
||
int dummy;
|
||
unsigned int i;
|
||
char *buffer;
|
||
CORE_ADDR marker;
|
||
int low_set;
|
||
|
||
found_base = cu_header->base_known;
|
||
base = cu_header->base_address;
|
||
buffer = dwarf_ranges_buffer + offset;
|
||
|
||
/* Read in the largest possible address. */
|
||
marker = read_address (obfd, buffer, cu_header, &dummy);
|
||
if ((marker & mask) == mask)
|
||
{
|
||
/* If we found the largest possible address, then
|
||
read the base address. */
|
||
base = read_address (obfd, buffer + addr_size,
|
||
cu_header, &dummy);
|
||
buffer += 2 * addr_size;
|
||
offset += 2 * addr_size;
|
||
found_base = 1;
|
||
}
|
||
|
||
low_set = 0;
|
||
|
||
while (1)
|
||
{
|
||
CORE_ADDR range_beginning, range_end;
|
||
|
||
range_beginning = read_address (obfd, buffer,
|
||
cu_header, &dummy);
|
||
buffer += addr_size;
|
||
range_end = read_address (obfd, buffer, cu_header, &dummy);
|
||
buffer += addr_size;
|
||
offset += 2 * addr_size;
|
||
|
||
/* An end of list marker is a pair of zero addresses. */
|
||
if (range_beginning == 0 && range_end == 0)
|
||
/* Found the end of list entry. */
|
||
break;
|
||
|
||
/* Each base address selection entry is a pair of 2 values.
|
||
The first is the largest possible address, the second is
|
||
the base address. Check for a base address here. */
|
||
if ((range_beginning & mask) == mask)
|
||
{
|
||
/* If we found the largest possible address, then
|
||
read the base address. */
|
||
base = read_address (obfd, buffer + addr_size,
|
||
cu_header, &dummy);
|
||
found_base = 1;
|
||
continue;
|
||
}
|
||
|
||
if (!found_base)
|
||
{
|
||
/* We have no valid base address for the ranges
|
||
data. */
|
||
complaint (&symfile_complaints,
|
||
"Invalid .debug_ranges data (no base address)");
|
||
return 0;
|
||
}
|
||
|
||
range_beginning += base;
|
||
range_end += base;
|
||
|
||
/* FIXME: This is recording everything as a low-high
|
||
segment of consecutive addresses. We should have a
|
||
data structure for discontiguous block ranges
|
||
instead. */
|
||
if (! low_set)
|
||
{
|
||
low = range_beginning;
|
||
high = range_end;
|
||
low_set = 1;
|
||
}
|
||
else
|
||
{
|
||
if (range_beginning < low)
|
||
low = range_beginning;
|
||
if (range_end > high)
|
||
high = range_end;
|
||
}
|
||
}
|
||
|
||
if (! low_set)
|
||
/* If the first entry is an end-of-list marker, the range
|
||
describes an empty scope, i.e. no instructions. */
|
||
return 0;
|
||
|
||
ret = -1;
|
||
}
|
||
}
|
||
|
||
if (high < low)
|
||
return 0;
|
||
|
||
/* When using the GNU linker, .gnu.linkonce. sections are used to
|
||
eliminate duplicate copies of functions and vtables and such.
|
||
The linker will arbitrarily choose one and discard the others.
|
||
The AT_*_pc values for such functions refer to local labels in
|
||
these sections. If the section from that file was discarded, the
|
||
labels are not in the output, so the relocs get a value of 0.
|
||
If this is a discarded function, mark the pc bounds as invalid,
|
||
so that GDB will ignore it. */
|
||
if (low == 0 && (bfd_get_file_flags (obfd) & HAS_RELOC) == 0)
|
||
return 0;
|
||
|
||
*lowpc = low;
|
||
*highpc = high;
|
||
return ret;
|
||
}
|
||
|
||
/* Add an aggregate field to the field list. */
|
||
|
||
static void
|
||
dwarf2_add_field (struct field_info *fip, struct die_info *die,
|
||
struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct nextfield *new_field;
|
||
struct attribute *attr;
|
||
struct field *fp;
|
||
char *fieldname = "";
|
||
|
||
/* Allocate a new field list entry and link it in. */
|
||
new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
|
||
make_cleanup (xfree, new_field);
|
||
memset (new_field, 0, sizeof (struct nextfield));
|
||
new_field->next = fip->fields;
|
||
fip->fields = new_field;
|
||
fip->nfields++;
|
||
|
||
/* Handle accessibility and virtuality of field.
|
||
The default accessibility for members is public, the default
|
||
accessibility for inheritance is private. */
|
||
if (die->tag != DW_TAG_inheritance)
|
||
new_field->accessibility = DW_ACCESS_public;
|
||
else
|
||
new_field->accessibility = DW_ACCESS_private;
|
||
new_field->virtuality = DW_VIRTUALITY_none;
|
||
|
||
attr = dwarf_attr (die, DW_AT_accessibility);
|
||
if (attr)
|
||
new_field->accessibility = DW_UNSND (attr);
|
||
if (new_field->accessibility != DW_ACCESS_public)
|
||
fip->non_public_fields = 1;
|
||
attr = dwarf_attr (die, DW_AT_virtuality);
|
||
if (attr)
|
||
new_field->virtuality = DW_UNSND (attr);
|
||
|
||
fp = &new_field->field;
|
||
|
||
if (die->tag == DW_TAG_member && ! die_is_declaration (die))
|
||
{
|
||
/* Data member other than a C++ static data member. */
|
||
|
||
/* Get type of field. */
|
||
fp->type = die_type (die, objfile, cu_header);
|
||
|
||
FIELD_STATIC_KIND (*fp) = 0;
|
||
|
||
/* Get bit size of field (zero if none). */
|
||
attr = dwarf_attr (die, DW_AT_bit_size);
|
||
if (attr)
|
||
{
|
||
FIELD_BITSIZE (*fp) = DW_UNSND (attr);
|
||
}
|
||
else
|
||
{
|
||
FIELD_BITSIZE (*fp) = 0;
|
||
}
|
||
|
||
/* Get bit offset of field. */
|
||
attr = dwarf_attr (die, DW_AT_data_member_location);
|
||
if (attr)
|
||
{
|
||
FIELD_BITPOS (*fp) =
|
||
decode_locdesc (DW_BLOCK (attr), objfile, cu_header) * bits_per_byte;
|
||
}
|
||
else
|
||
FIELD_BITPOS (*fp) = 0;
|
||
attr = dwarf_attr (die, DW_AT_bit_offset);
|
||
if (attr)
|
||
{
|
||
if (BITS_BIG_ENDIAN)
|
||
{
|
||
/* For big endian bits, the DW_AT_bit_offset gives the
|
||
additional bit offset from the MSB of the containing
|
||
anonymous object to the MSB of the field. We don't
|
||
have to do anything special since we don't need to
|
||
know the size of the anonymous object. */
|
||
FIELD_BITPOS (*fp) += DW_UNSND (attr);
|
||
}
|
||
else
|
||
{
|
||
/* For little endian bits, compute the bit offset to the
|
||
MSB of the anonymous object, subtract off the number of
|
||
bits from the MSB of the field to the MSB of the
|
||
object, and then subtract off the number of bits of
|
||
the field itself. The result is the bit offset of
|
||
the LSB of the field. */
|
||
int anonymous_size;
|
||
int bit_offset = DW_UNSND (attr);
|
||
|
||
attr = dwarf_attr (die, DW_AT_byte_size);
|
||
if (attr)
|
||
{
|
||
/* The size of the anonymous object containing
|
||
the bit field is explicit, so use the
|
||
indicated size (in bytes). */
|
||
anonymous_size = DW_UNSND (attr);
|
||
}
|
||
else
|
||
{
|
||
/* The size of the anonymous object containing
|
||
the bit field must be inferred from the type
|
||
attribute of the data member containing the
|
||
bit field. */
|
||
anonymous_size = TYPE_LENGTH (fp->type);
|
||
}
|
||
FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
|
||
- bit_offset - FIELD_BITSIZE (*fp);
|
||
}
|
||
}
|
||
|
||
/* Get name of field. */
|
||
attr = dwarf_attr (die, DW_AT_name);
|
||
if (attr && DW_STRING (attr))
|
||
fieldname = DW_STRING (attr);
|
||
fp->name = obsavestring (fieldname, strlen (fieldname),
|
||
&objfile->type_obstack);
|
||
|
||
/* Change accessibility for artificial fields (e.g. virtual table
|
||
pointer or virtual base class pointer) to private. */
|
||
if (dwarf_attr (die, DW_AT_artificial))
|
||
{
|
||
new_field->accessibility = DW_ACCESS_private;
|
||
fip->non_public_fields = 1;
|
||
}
|
||
}
|
||
else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
|
||
{
|
||
/* C++ static member. */
|
||
|
||
/* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
|
||
is a declaration, but all versions of G++ as of this writing
|
||
(so through at least 3.2.1) incorrectly generate
|
||
DW_TAG_variable tags. */
|
||
|
||
char *physname;
|
||
|
||
/* Get name of field. */
|
||
attr = dwarf_attr (die, DW_AT_name);
|
||
if (attr && DW_STRING (attr))
|
||
fieldname = DW_STRING (attr);
|
||
else
|
||
return;
|
||
|
||
/* Get physical name. */
|
||
physname = dwarf2_linkage_name (die);
|
||
|
||
SET_FIELD_PHYSNAME (*fp, obsavestring (physname, strlen (physname),
|
||
&objfile->type_obstack));
|
||
FIELD_TYPE (*fp) = die_type (die, objfile, cu_header);
|
||
FIELD_NAME (*fp) = obsavestring (fieldname, strlen (fieldname),
|
||
&objfile->type_obstack);
|
||
}
|
||
else if (die->tag == DW_TAG_inheritance)
|
||
{
|
||
/* C++ base class field. */
|
||
attr = dwarf_attr (die, DW_AT_data_member_location);
|
||
if (attr)
|
||
FIELD_BITPOS (*fp) = (decode_locdesc (DW_BLOCK (attr), objfile, cu_header)
|
||
* bits_per_byte);
|
||
FIELD_BITSIZE (*fp) = 0;
|
||
FIELD_STATIC_KIND (*fp) = 0;
|
||
FIELD_TYPE (*fp) = die_type (die, objfile, cu_header);
|
||
FIELD_NAME (*fp) = type_name_no_tag (fp->type);
|
||
fip->nbaseclasses++;
|
||
}
|
||
}
|
||
|
||
/* Create the vector of fields, and attach it to the type. */
|
||
|
||
static void
|
||
dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
|
||
struct objfile *objfile)
|
||
{
|
||
int nfields = fip->nfields;
|
||
|
||
/* Record the field count, allocate space for the array of fields,
|
||
and create blank accessibility bitfields if necessary. */
|
||
TYPE_NFIELDS (type) = nfields;
|
||
TYPE_FIELDS (type) = (struct field *)
|
||
TYPE_ALLOC (type, sizeof (struct field) * nfields);
|
||
memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
|
||
|
||
if (fip->non_public_fields)
|
||
{
|
||
ALLOCATE_CPLUS_STRUCT_TYPE (type);
|
||
|
||
TYPE_FIELD_PRIVATE_BITS (type) =
|
||
(B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
|
||
B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
|
||
|
||
TYPE_FIELD_PROTECTED_BITS (type) =
|
||
(B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
|
||
B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
|
||
|
||
TYPE_FIELD_IGNORE_BITS (type) =
|
||
(B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
|
||
B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
|
||
}
|
||
|
||
/* If the type has baseclasses, allocate and clear a bit vector for
|
||
TYPE_FIELD_VIRTUAL_BITS. */
|
||
if (fip->nbaseclasses)
|
||
{
|
||
int num_bytes = B_BYTES (fip->nbaseclasses);
|
||
char *pointer;
|
||
|
||
ALLOCATE_CPLUS_STRUCT_TYPE (type);
|
||
pointer = (char *) TYPE_ALLOC (type, num_bytes);
|
||
TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
|
||
B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
|
||
TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
|
||
}
|
||
|
||
/* Copy the saved-up fields into the field vector. Start from the head
|
||
of the list, adding to the tail of the field array, so that they end
|
||
up in the same order in the array in which they were added to the list. */
|
||
while (nfields-- > 0)
|
||
{
|
||
TYPE_FIELD (type, nfields) = fip->fields->field;
|
||
switch (fip->fields->accessibility)
|
||
{
|
||
case DW_ACCESS_private:
|
||
SET_TYPE_FIELD_PRIVATE (type, nfields);
|
||
break;
|
||
|
||
case DW_ACCESS_protected:
|
||
SET_TYPE_FIELD_PROTECTED (type, nfields);
|
||
break;
|
||
|
||
case DW_ACCESS_public:
|
||
break;
|
||
|
||
default:
|
||
/* Unknown accessibility. Complain and treat it as public. */
|
||
{
|
||
complaint (&symfile_complaints, "unsupported accessibility %d",
|
||
fip->fields->accessibility);
|
||
}
|
||
break;
|
||
}
|
||
if (nfields < fip->nbaseclasses)
|
||
{
|
||
switch (fip->fields->virtuality)
|
||
{
|
||
case DW_VIRTUALITY_virtual:
|
||
case DW_VIRTUALITY_pure_virtual:
|
||
SET_TYPE_FIELD_VIRTUAL (type, nfields);
|
||
break;
|
||
}
|
||
}
|
||
fip->fields = fip->fields->next;
|
||
}
|
||
}
|
||
|
||
/* Add a member function to the proper fieldlist. */
|
||
|
||
static void
|
||
dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
|
||
struct type *type, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct attribute *attr;
|
||
struct fnfieldlist *flp;
|
||
int i;
|
||
struct fn_field *fnp;
|
||
char *fieldname;
|
||
char *physname;
|
||
struct nextfnfield *new_fnfield;
|
||
|
||
/* Get name of member function. */
|
||
attr = dwarf_attr (die, DW_AT_name);
|
||
if (attr && DW_STRING (attr))
|
||
fieldname = DW_STRING (attr);
|
||
else
|
||
return;
|
||
|
||
/* Get the mangled name. */
|
||
physname = dwarf2_linkage_name (die);
|
||
|
||
/* Look up member function name in fieldlist. */
|
||
for (i = 0; i < fip->nfnfields; i++)
|
||
{
|
||
if (STREQ (fip->fnfieldlists[i].name, fieldname))
|
||
break;
|
||
}
|
||
|
||
/* Create new list element if necessary. */
|
||
if (i < fip->nfnfields)
|
||
flp = &fip->fnfieldlists[i];
|
||
else
|
||
{
|
||
if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
|
||
{
|
||
fip->fnfieldlists = (struct fnfieldlist *)
|
||
xrealloc (fip->fnfieldlists,
|
||
(fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
|
||
* sizeof (struct fnfieldlist));
|
||
if (fip->nfnfields == 0)
|
||
make_cleanup (free_current_contents, &fip->fnfieldlists);
|
||
}
|
||
flp = &fip->fnfieldlists[fip->nfnfields];
|
||
flp->name = fieldname;
|
||
flp->length = 0;
|
||
flp->head = NULL;
|
||
fip->nfnfields++;
|
||
}
|
||
|
||
/* Create a new member function field and chain it to the field list
|
||
entry. */
|
||
new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
|
||
make_cleanup (xfree, new_fnfield);
|
||
memset (new_fnfield, 0, sizeof (struct nextfnfield));
|
||
new_fnfield->next = flp->head;
|
||
flp->head = new_fnfield;
|
||
flp->length++;
|
||
|
||
/* Fill in the member function field info. */
|
||
fnp = &new_fnfield->fnfield;
|
||
fnp->physname = obsavestring (physname, strlen (physname),
|
||
&objfile->type_obstack);
|
||
fnp->type = alloc_type (objfile);
|
||
if (die->type && TYPE_CODE (die->type) == TYPE_CODE_FUNC)
|
||
{
|
||
struct type *return_type = TYPE_TARGET_TYPE (die->type);
|
||
int nparams = TYPE_NFIELDS (die->type);
|
||
|
||
/* TYPE is the domain of this method, and DIE->TYPE is the type
|
||
of the method itself (TYPE_CODE_METHOD). */
|
||
smash_to_method_type (fnp->type, type,
|
||
TYPE_TARGET_TYPE (die->type),
|
||
TYPE_FIELDS (die->type),
|
||
TYPE_NFIELDS (die->type),
|
||
TYPE_VARARGS (die->type));
|
||
|
||
/* Handle static member functions.
|
||
Dwarf2 has no clean way to discern C++ static and non-static
|
||
member functions. G++ helps GDB by marking the first
|
||
parameter for non-static member functions (which is the
|
||
this pointer) as artificial. We obtain this information
|
||
from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
|
||
if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (die->type, 0) == 0)
|
||
fnp->voffset = VOFFSET_STATIC;
|
||
}
|
||
else
|
||
complaint (&symfile_complaints, "member function type missing for '%s'",
|
||
physname);
|
||
|
||
/* Get fcontext from DW_AT_containing_type if present. */
|
||
if (dwarf_attr (die, DW_AT_containing_type) != NULL)
|
||
fnp->fcontext = die_containing_type (die, objfile, cu_header);
|
||
|
||
/* dwarf2 doesn't have stubbed physical names, so the setting of is_const
|
||
and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
|
||
|
||
/* Get accessibility. */
|
||
attr = dwarf_attr (die, DW_AT_accessibility);
|
||
if (attr)
|
||
{
|
||
switch (DW_UNSND (attr))
|
||
{
|
||
case DW_ACCESS_private:
|
||
fnp->is_private = 1;
|
||
break;
|
||
case DW_ACCESS_protected:
|
||
fnp->is_protected = 1;
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Check for artificial methods. */
|
||
attr = dwarf_attr (die, DW_AT_artificial);
|
||
if (attr && DW_UNSND (attr) != 0)
|
||
fnp->is_artificial = 1;
|
||
|
||
/* Get index in virtual function table if it is a virtual member function. */
|
||
attr = dwarf_attr (die, DW_AT_vtable_elem_location);
|
||
if (attr)
|
||
{
|
||
/* Support the .debug_loc offsets */
|
||
if (attr_form_is_block (attr))
|
||
{
|
||
fnp->voffset = decode_locdesc (DW_BLOCK (attr), objfile, cu_header) + 2;
|
||
}
|
||
else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
|
||
{
|
||
dwarf2_complex_location_expr_complaint ();
|
||
}
|
||
else
|
||
{
|
||
dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
|
||
fieldname);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Create the vector of member function fields, and attach it to the type. */
|
||
|
||
static void
|
||
dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
|
||
struct objfile *objfile)
|
||
{
|
||
struct fnfieldlist *flp;
|
||
int total_length = 0;
|
||
int i;
|
||
|
||
ALLOCATE_CPLUS_STRUCT_TYPE (type);
|
||
TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
|
||
TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
|
||
|
||
for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
|
||
{
|
||
struct nextfnfield *nfp = flp->head;
|
||
struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
|
||
int k;
|
||
|
||
TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
|
||
TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
|
||
fn_flp->fn_fields = (struct fn_field *)
|
||
TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
|
||
for (k = flp->length; (k--, nfp); nfp = nfp->next)
|
||
fn_flp->fn_fields[k] = nfp->fnfield;
|
||
|
||
total_length += flp->length;
|
||
}
|
||
|
||
TYPE_NFN_FIELDS (type) = fip->nfnfields;
|
||
TYPE_NFN_FIELDS_TOTAL (type) = total_length;
|
||
}
|
||
|
||
/* Called when we find the DIE that starts a structure or union scope
|
||
(definition) to process all dies that define the members of the
|
||
structure or union.
|
||
|
||
NOTE: we need to call struct_type regardless of whether or not the
|
||
DIE has an at_name attribute, since it might be an anonymous
|
||
structure or union. This gets the type entered into our set of
|
||
user defined types.
|
||
|
||
However, if the structure is incomplete (an opaque struct/union)
|
||
then suppress creating a symbol table entry for it since gdb only
|
||
wants to find the one with the complete definition. Note that if
|
||
it is complete, we just call new_symbol, which does it's own
|
||
checking about whether the struct/union is anonymous or not (and
|
||
suppresses creating a symbol table entry itself). */
|
||
|
||
static void
|
||
read_structure_scope (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct type *type;
|
||
struct attribute *attr;
|
||
|
||
type = alloc_type (objfile);
|
||
|
||
INIT_CPLUS_SPECIFIC (type);
|
||
attr = dwarf_attr (die, DW_AT_name);
|
||
if (attr && DW_STRING (attr))
|
||
{
|
||
TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr),
|
||
strlen (DW_STRING (attr)),
|
||
&objfile->type_obstack);
|
||
}
|
||
|
||
if (die->tag == DW_TAG_structure_type)
|
||
{
|
||
TYPE_CODE (type) = TYPE_CODE_STRUCT;
|
||
}
|
||
else if (die->tag == DW_TAG_union_type)
|
||
{
|
||
TYPE_CODE (type) = TYPE_CODE_UNION;
|
||
}
|
||
else
|
||
{
|
||
/* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
|
||
in gdbtypes.h. */
|
||
TYPE_CODE (type) = TYPE_CODE_CLASS;
|
||
}
|
||
|
||
attr = dwarf_attr (die, DW_AT_byte_size);
|
||
if (attr)
|
||
{
|
||
TYPE_LENGTH (type) = DW_UNSND (attr);
|
||
}
|
||
else
|
||
{
|
||
TYPE_LENGTH (type) = 0;
|
||
}
|
||
|
||
/* We need to add the type field to the die immediately so we don't
|
||
infinitely recurse when dealing with pointers to the structure
|
||
type within the structure itself. */
|
||
die->type = type;
|
||
|
||
if (die->has_children && ! die_is_declaration (die))
|
||
{
|
||
struct field_info fi;
|
||
struct die_info *child_die;
|
||
struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
|
||
|
||
memset (&fi, 0, sizeof (struct field_info));
|
||
|
||
child_die = die->next;
|
||
|
||
while (child_die && child_die->tag)
|
||
{
|
||
if (child_die->tag == DW_TAG_member
|
||
|| child_die->tag == DW_TAG_variable)
|
||
{
|
||
/* NOTE: carlton/2002-11-05: A C++ static data member
|
||
should be a DW_TAG_member that is a declaration, but
|
||
all versions of G++ as of this writing (so through at
|
||
least 3.2.1) incorrectly generate DW_TAG_variable
|
||
tags for them instead. */
|
||
dwarf2_add_field (&fi, child_die, objfile, cu_header);
|
||
}
|
||
else if (child_die->tag == DW_TAG_subprogram)
|
||
{
|
||
/* C++ member function. */
|
||
process_die (child_die, objfile, cu_header);
|
||
dwarf2_add_member_fn (&fi, child_die, type, objfile, cu_header);
|
||
}
|
||
else if (child_die->tag == DW_TAG_inheritance)
|
||
{
|
||
/* C++ base class field. */
|
||
dwarf2_add_field (&fi, child_die, objfile, cu_header);
|
||
}
|
||
else
|
||
{
|
||
process_die (child_die, objfile, cu_header);
|
||
}
|
||
child_die = sibling_die (child_die);
|
||
}
|
||
|
||
/* Attach fields and member functions to the type. */
|
||
if (fi.nfields)
|
||
dwarf2_attach_fields_to_type (&fi, type, objfile);
|
||
if (fi.nfnfields)
|
||
{
|
||
dwarf2_attach_fn_fields_to_type (&fi, type, objfile);
|
||
|
||
/* Get the type which refers to the base class (possibly this
|
||
class itself) which contains the vtable pointer for the current
|
||
class from the DW_AT_containing_type attribute. */
|
||
|
||
if (dwarf_attr (die, DW_AT_containing_type) != NULL)
|
||
{
|
||
struct type *t = die_containing_type (die, objfile, cu_header);
|
||
|
||
TYPE_VPTR_BASETYPE (type) = t;
|
||
if (type == t)
|
||
{
|
||
static const char vptr_name[] =
|
||
{'_', 'v', 'p', 't', 'r', '\0'};
|
||
int i;
|
||
|
||
/* Our own class provides vtbl ptr. */
|
||
for (i = TYPE_NFIELDS (t) - 1;
|
||
i >= TYPE_N_BASECLASSES (t);
|
||
--i)
|
||
{
|
||
char *fieldname = TYPE_FIELD_NAME (t, i);
|
||
|
||
if (STREQN (fieldname, vptr_name, strlen (vptr_name) - 1)
|
||
&& is_cplus_marker (fieldname[strlen (vptr_name)]))
|
||
{
|
||
TYPE_VPTR_FIELDNO (type) = i;
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Complain if virtual function table field not found. */
|
||
if (i < TYPE_N_BASECLASSES (t))
|
||
complaint (&symfile_complaints,
|
||
"virtual function table pointer not found when defining class '%s'",
|
||
TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
|
||
"");
|
||
}
|
||
else
|
||
{
|
||
TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
|
||
}
|
||
}
|
||
}
|
||
|
||
new_symbol (die, type, objfile, cu_header);
|
||
|
||
do_cleanups (back_to);
|
||
}
|
||
else
|
||
{
|
||
/* No children, must be stub. */
|
||
TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
|
||
}
|
||
}
|
||
|
||
/* Given a pointer to a die which begins an enumeration, process all
|
||
the dies that define the members of the enumeration.
|
||
|
||
This will be much nicer in draft 6 of the DWARF spec when our
|
||
members will be dies instead squished into the DW_AT_element_list
|
||
attribute.
|
||
|
||
NOTE: We reverse the order of the element list. */
|
||
|
||
static void
|
||
read_enumeration (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct die_info *child_die;
|
||
struct type *type;
|
||
struct field *fields;
|
||
struct attribute *attr;
|
||
struct symbol *sym;
|
||
int num_fields;
|
||
int unsigned_enum = 1;
|
||
|
||
type = alloc_type (objfile);
|
||
|
||
TYPE_CODE (type) = TYPE_CODE_ENUM;
|
||
attr = dwarf_attr (die, DW_AT_name);
|
||
if (attr && DW_STRING (attr))
|
||
{
|
||
TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr),
|
||
strlen (DW_STRING (attr)),
|
||
&objfile->type_obstack);
|
||
}
|
||
|
||
attr = dwarf_attr (die, DW_AT_byte_size);
|
||
if (attr)
|
||
{
|
||
TYPE_LENGTH (type) = DW_UNSND (attr);
|
||
}
|
||
else
|
||
{
|
||
TYPE_LENGTH (type) = 0;
|
||
}
|
||
|
||
num_fields = 0;
|
||
fields = NULL;
|
||
if (die->has_children)
|
||
{
|
||
child_die = die->next;
|
||
while (child_die && child_die->tag)
|
||
{
|
||
if (child_die->tag != DW_TAG_enumerator)
|
||
{
|
||
process_die (child_die, objfile, cu_header);
|
||
}
|
||
else
|
||
{
|
||
attr = dwarf_attr (child_die, DW_AT_name);
|
||
if (attr)
|
||
{
|
||
sym = new_symbol (child_die, type, objfile, cu_header);
|
||
if (SYMBOL_VALUE (sym) < 0)
|
||
unsigned_enum = 0;
|
||
|
||
if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
|
||
{
|
||
fields = (struct field *)
|
||
xrealloc (fields,
|
||
(num_fields + DW_FIELD_ALLOC_CHUNK)
|
||
* sizeof (struct field));
|
||
}
|
||
|
||
FIELD_NAME (fields[num_fields]) = DEPRECATED_SYMBOL_NAME (sym);
|
||
FIELD_TYPE (fields[num_fields]) = NULL;
|
||
FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym);
|
||
FIELD_BITSIZE (fields[num_fields]) = 0;
|
||
FIELD_STATIC_KIND (fields[num_fields]) = 0;
|
||
|
||
num_fields++;
|
||
}
|
||
}
|
||
|
||
child_die = sibling_die (child_die);
|
||
}
|
||
|
||
if (num_fields)
|
||
{
|
||
TYPE_NFIELDS (type) = num_fields;
|
||
TYPE_FIELDS (type) = (struct field *)
|
||
TYPE_ALLOC (type, sizeof (struct field) * num_fields);
|
||
memcpy (TYPE_FIELDS (type), fields,
|
||
sizeof (struct field) * num_fields);
|
||
xfree (fields);
|
||
}
|
||
if (unsigned_enum)
|
||
TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED;
|
||
}
|
||
die->type = type;
|
||
new_symbol (die, type, objfile, cu_header);
|
||
}
|
||
|
||
/* Extract all information from a DW_TAG_array_type DIE and put it in
|
||
the DIE's type field. For now, this only handles one dimensional
|
||
arrays. */
|
||
|
||
static void
|
||
read_array_type (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct die_info *child_die;
|
||
struct type *type = NULL;
|
||
struct type *element_type, *range_type, *index_type;
|
||
struct type **range_types = NULL;
|
||
struct attribute *attr;
|
||
int ndim = 0;
|
||
struct cleanup *back_to;
|
||
|
||
/* Return if we've already decoded this type. */
|
||
if (die->type)
|
||
{
|
||
return;
|
||
}
|
||
|
||
element_type = die_type (die, objfile, cu_header);
|
||
|
||
/* Irix 6.2 native cc creates array types without children for
|
||
arrays with unspecified length. */
|
||
if (die->has_children == 0)
|
||
{
|
||
index_type = dwarf2_fundamental_type (objfile, FT_INTEGER);
|
||
range_type = create_range_type (NULL, index_type, 0, -1);
|
||
die->type = create_array_type (NULL, element_type, range_type);
|
||
return;
|
||
}
|
||
|
||
back_to = make_cleanup (null_cleanup, NULL);
|
||
child_die = die->next;
|
||
while (child_die && child_die->tag)
|
||
{
|
||
if (child_die->tag == DW_TAG_subrange_type)
|
||
{
|
||
unsigned int low, high;
|
||
|
||
/* Default bounds to an array with unspecified length. */
|
||
low = 0;
|
||
high = -1;
|
||
if (cu_language == language_fortran)
|
||
{
|
||
/* FORTRAN implies a lower bound of 1, if not given. */
|
||
low = 1;
|
||
}
|
||
|
||
index_type = die_type (child_die, objfile, cu_header);
|
||
attr = dwarf_attr (child_die, DW_AT_lower_bound);
|
||
if (attr)
|
||
{
|
||
if (attr->form == DW_FORM_sdata)
|
||
{
|
||
low = DW_SND (attr);
|
||
}
|
||
else if (attr->form == DW_FORM_udata
|
||
|| attr->form == DW_FORM_data1
|
||
|| attr->form == DW_FORM_data2
|
||
|| attr->form == DW_FORM_data4
|
||
|| attr->form == DW_FORM_data8)
|
||
{
|
||
low = DW_UNSND (attr);
|
||
}
|
||
else
|
||
{
|
||
dwarf2_non_const_array_bound_ignored_complaint
|
||
(dwarf_form_name (attr->form));
|
||
#ifdef FORTRAN_HACK
|
||
die->type = lookup_pointer_type (element_type);
|
||
return;
|
||
#else
|
||
low = 0;
|
||
#endif
|
||
}
|
||
}
|
||
attr = dwarf_attr (child_die, DW_AT_upper_bound);
|
||
if (attr)
|
||
{
|
||
if (attr->form == DW_FORM_sdata)
|
||
{
|
||
high = DW_SND (attr);
|
||
}
|
||
else if (attr->form == DW_FORM_udata
|
||
|| attr->form == DW_FORM_data1
|
||
|| attr->form == DW_FORM_data2
|
||
|| attr->form == DW_FORM_data4
|
||
|| attr->form == DW_FORM_data8)
|
||
{
|
||
high = DW_UNSND (attr);
|
||
}
|
||
else if (attr->form == DW_FORM_block1)
|
||
{
|
||
/* GCC encodes arrays with unspecified or dynamic length
|
||
with a DW_FORM_block1 attribute.
|
||
FIXME: GDB does not yet know how to handle dynamic
|
||
arrays properly, treat them as arrays with unspecified
|
||
length for now. */
|
||
high = -1;
|
||
}
|
||
else
|
||
{
|
||
dwarf2_non_const_array_bound_ignored_complaint
|
||
(dwarf_form_name (attr->form));
|
||
#ifdef FORTRAN_HACK
|
||
die->type = lookup_pointer_type (element_type);
|
||
return;
|
||
#else
|
||
high = 1;
|
||
#endif
|
||
}
|
||
}
|
||
|
||
/* Create a range type and save it for array type creation. */
|
||
if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
|
||
{
|
||
range_types = (struct type **)
|
||
xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
|
||
* sizeof (struct type *));
|
||
if (ndim == 0)
|
||
make_cleanup (free_current_contents, &range_types);
|
||
}
|
||
range_types[ndim++] = create_range_type (NULL, index_type, low, high);
|
||
}
|
||
child_die = sibling_die (child_die);
|
||
}
|
||
|
||
/* Dwarf2 dimensions are output from left to right, create the
|
||
necessary array types in backwards order. */
|
||
type = element_type;
|
||
while (ndim-- > 0)
|
||
type = create_array_type (NULL, type, range_types[ndim]);
|
||
|
||
/* Understand Dwarf2 support for vector types (like they occur on
|
||
the PowerPC w/ AltiVec). Gcc just adds another attribute to the
|
||
array type. This is not part of the Dwarf2/3 standard yet, but a
|
||
custom vendor extension. The main difference between a regular
|
||
array and the vector variant is that vectors are passed by value
|
||
to functions. */
|
||
attr = dwarf_attr (die, DW_AT_GNU_vector);
|
||
if (attr)
|
||
TYPE_FLAGS (type) |= TYPE_FLAG_VECTOR;
|
||
|
||
do_cleanups (back_to);
|
||
|
||
/* Install the type in the die. */
|
||
die->type = type;
|
||
}
|
||
|
||
/* First cut: install each common block member as a global variable. */
|
||
|
||
static void
|
||
read_common_block (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct die_info *child_die;
|
||
struct attribute *attr;
|
||
struct symbol *sym;
|
||
CORE_ADDR base = (CORE_ADDR) 0;
|
||
|
||
attr = dwarf_attr (die, DW_AT_location);
|
||
if (attr)
|
||
{
|
||
/* Support the .debug_loc offsets */
|
||
if (attr_form_is_block (attr))
|
||
{
|
||
base = decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
|
||
}
|
||
else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
|
||
{
|
||
dwarf2_complex_location_expr_complaint ();
|
||
}
|
||
else
|
||
{
|
||
dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
|
||
"common block member");
|
||
}
|
||
}
|
||
if (die->has_children)
|
||
{
|
||
child_die = die->next;
|
||
while (child_die && child_die->tag)
|
||
{
|
||
sym = new_symbol (child_die, NULL, objfile, cu_header);
|
||
attr = dwarf_attr (child_die, DW_AT_data_member_location);
|
||
if (attr)
|
||
{
|
||
SYMBOL_VALUE_ADDRESS (sym) =
|
||
base + decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
|
||
add_symbol_to_list (sym, &global_symbols);
|
||
}
|
||
child_die = sibling_die (child_die);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Read a C++ namespace. */
|
||
|
||
static void
|
||
read_namespace (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
const char *previous_namespace = processing_current_namespace;
|
||
const char *name = NULL;
|
||
int is_anonymous;
|
||
struct die_info *current_die;
|
||
|
||
/* Loop through the extensions until we find a name. */
|
||
|
||
for (current_die = die;
|
||
current_die != NULL;
|
||
current_die = dwarf2_extension (die))
|
||
{
|
||
name = dwarf2_name (current_die);
|
||
if (name != NULL)
|
||
break;
|
||
}
|
||
|
||
/* Is it an anonymous namespace? */
|
||
|
||
is_anonymous = (name == NULL);
|
||
if (is_anonymous)
|
||
name = "(anonymous namespace)";
|
||
|
||
/* Now build the name of the current namespace. */
|
||
|
||
if (previous_namespace[0] == '\0')
|
||
{
|
||
processing_current_namespace = name;
|
||
}
|
||
else
|
||
{
|
||
/* We need temp_name around because processing_current_namespace
|
||
is a const char *. */
|
||
char *temp_name = alloca (strlen (previous_namespace)
|
||
+ 2 + strlen(name) + 1);
|
||
strcpy (temp_name, previous_namespace);
|
||
strcat (temp_name, "::");
|
||
strcat (temp_name, name);
|
||
|
||
processing_current_namespace = temp_name;
|
||
}
|
||
|
||
/* If it's an anonymous namespace that we're seeing for the first
|
||
time, add a using directive. */
|
||
|
||
if (is_anonymous && dwarf_attr (die, DW_AT_extension) == NULL)
|
||
cp_add_using_directive (processing_current_namespace,
|
||
strlen (previous_namespace),
|
||
strlen (processing_current_namespace));
|
||
|
||
if (die->has_children)
|
||
{
|
||
struct die_info *child_die = die->next;
|
||
|
||
while (child_die && child_die->tag)
|
||
{
|
||
process_die (child_die, objfile, cu_header);
|
||
child_die = sibling_die (child_die);
|
||
}
|
||
}
|
||
|
||
processing_current_namespace = previous_namespace;
|
||
}
|
||
|
||
/* Extract all information from a DW_TAG_pointer_type DIE and add to
|
||
the user defined type vector. */
|
||
|
||
static void
|
||
read_tag_pointer_type (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct type *type;
|
||
struct attribute *attr_byte_size;
|
||
struct attribute *attr_address_class;
|
||
int byte_size, addr_class;
|
||
|
||
if (die->type)
|
||
{
|
||
return;
|
||
}
|
||
|
||
type = lookup_pointer_type (die_type (die, objfile, cu_header));
|
||
|
||
attr_byte_size = dwarf_attr (die, DW_AT_byte_size);
|
||
if (attr_byte_size)
|
||
byte_size = DW_UNSND (attr_byte_size);
|
||
else
|
||
byte_size = cu_header->addr_size;
|
||
|
||
attr_address_class = dwarf_attr (die, DW_AT_address_class);
|
||
if (attr_address_class)
|
||
addr_class = DW_UNSND (attr_address_class);
|
||
else
|
||
addr_class = DW_ADDR_none;
|
||
|
||
/* If the pointer size or address class is different than the
|
||
default, create a type variant marked as such and set the
|
||
length accordingly. */
|
||
if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
|
||
{
|
||
if (ADDRESS_CLASS_TYPE_FLAGS_P ())
|
||
{
|
||
int type_flags;
|
||
|
||
type_flags = ADDRESS_CLASS_TYPE_FLAGS (byte_size, addr_class);
|
||
gdb_assert ((type_flags & ~TYPE_FLAG_ADDRESS_CLASS_ALL) == 0);
|
||
type = make_type_with_address_space (type, type_flags);
|
||
}
|
||
else if (TYPE_LENGTH (type) != byte_size)
|
||
{
|
||
complaint (&symfile_complaints, "invalid pointer size %d", byte_size);
|
||
}
|
||
else {
|
||
/* Should we also complain about unhandled address classes? */
|
||
}
|
||
}
|
||
|
||
TYPE_LENGTH (type) = byte_size;
|
||
die->type = type;
|
||
}
|
||
|
||
/* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
|
||
the user defined type vector. */
|
||
|
||
static void
|
||
read_tag_ptr_to_member_type (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct type *type;
|
||
struct type *to_type;
|
||
struct type *domain;
|
||
|
||
if (die->type)
|
||
{
|
||
return;
|
||
}
|
||
|
||
type = alloc_type (objfile);
|
||
to_type = die_type (die, objfile, cu_header);
|
||
domain = die_containing_type (die, objfile, cu_header);
|
||
smash_to_member_type (type, domain, to_type);
|
||
|
||
die->type = type;
|
||
}
|
||
|
||
/* Extract all information from a DW_TAG_reference_type DIE and add to
|
||
the user defined type vector. */
|
||
|
||
static void
|
||
read_tag_reference_type (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct type *type;
|
||
struct attribute *attr;
|
||
|
||
if (die->type)
|
||
{
|
||
return;
|
||
}
|
||
|
||
type = lookup_reference_type (die_type (die, objfile, cu_header));
|
||
attr = dwarf_attr (die, DW_AT_byte_size);
|
||
if (attr)
|
||
{
|
||
TYPE_LENGTH (type) = DW_UNSND (attr);
|
||
}
|
||
else
|
||
{
|
||
TYPE_LENGTH (type) = cu_header->addr_size;
|
||
}
|
||
die->type = type;
|
||
}
|
||
|
||
static void
|
||
read_tag_const_type (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct type *base_type;
|
||
|
||
if (die->type)
|
||
{
|
||
return;
|
||
}
|
||
|
||
base_type = die_type (die, objfile, cu_header);
|
||
die->type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
|
||
}
|
||
|
||
static void
|
||
read_tag_volatile_type (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct type *base_type;
|
||
|
||
if (die->type)
|
||
{
|
||
return;
|
||
}
|
||
|
||
base_type = die_type (die, objfile, cu_header);
|
||
die->type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
|
||
}
|
||
|
||
/* Extract all information from a DW_TAG_string_type DIE and add to
|
||
the user defined type vector. It isn't really a user defined type,
|
||
but it behaves like one, with other DIE's using an AT_user_def_type
|
||
attribute to reference it. */
|
||
|
||
static void
|
||
read_tag_string_type (struct die_info *die, struct objfile *objfile)
|
||
{
|
||
struct type *type, *range_type, *index_type, *char_type;
|
||
struct attribute *attr;
|
||
unsigned int length;
|
||
|
||
if (die->type)
|
||
{
|
||
return;
|
||
}
|
||
|
||
attr = dwarf_attr (die, DW_AT_string_length);
|
||
if (attr)
|
||
{
|
||
length = DW_UNSND (attr);
|
||
}
|
||
else
|
||
{
|
||
/* check for the DW_AT_byte_size attribute */
|
||
attr = dwarf_attr (die, DW_AT_byte_size);
|
||
if (attr)
|
||
{
|
||
length = DW_UNSND (attr);
|
||
}
|
||
else
|
||
{
|
||
length = 1;
|
||
}
|
||
}
|
||
index_type = dwarf2_fundamental_type (objfile, FT_INTEGER);
|
||
range_type = create_range_type (NULL, index_type, 1, length);
|
||
if (cu_language == language_fortran)
|
||
{
|
||
/* Need to create a unique string type for bounds
|
||
information */
|
||
type = create_string_type (0, range_type);
|
||
}
|
||
else
|
||
{
|
||
char_type = dwarf2_fundamental_type (objfile, FT_CHAR);
|
||
type = create_string_type (char_type, range_type);
|
||
}
|
||
die->type = type;
|
||
}
|
||
|
||
/* Handle DIES due to C code like:
|
||
|
||
struct foo
|
||
{
|
||
int (*funcp)(int a, long l);
|
||
int b;
|
||
};
|
||
|
||
('funcp' generates a DW_TAG_subroutine_type DIE)
|
||
*/
|
||
|
||
static void
|
||
read_subroutine_type (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct type *type; /* Type that this function returns */
|
||
struct type *ftype; /* Function that returns above type */
|
||
struct attribute *attr;
|
||
|
||
/* Decode the type that this subroutine returns */
|
||
if (die->type)
|
||
{
|
||
return;
|
||
}
|
||
type = die_type (die, objfile, cu_header);
|
||
ftype = lookup_function_type (type);
|
||
|
||
/* All functions in C++ have prototypes. */
|
||
attr = dwarf_attr (die, DW_AT_prototyped);
|
||
if ((attr && (DW_UNSND (attr) != 0))
|
||
|| cu_language == language_cplus)
|
||
TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED;
|
||
|
||
if (die->has_children)
|
||
{
|
||
struct die_info *child_die;
|
||
int nparams = 0;
|
||
int iparams = 0;
|
||
|
||
/* Count the number of parameters.
|
||
FIXME: GDB currently ignores vararg functions, but knows about
|
||
vararg member functions. */
|
||
child_die = die->next;
|
||
while (child_die && child_die->tag)
|
||
{
|
||
if (child_die->tag == DW_TAG_formal_parameter)
|
||
nparams++;
|
||
else if (child_die->tag == DW_TAG_unspecified_parameters)
|
||
TYPE_FLAGS (ftype) |= TYPE_FLAG_VARARGS;
|
||
child_die = sibling_die (child_die);
|
||
}
|
||
|
||
/* Allocate storage for parameters and fill them in. */
|
||
TYPE_NFIELDS (ftype) = nparams;
|
||
TYPE_FIELDS (ftype) = (struct field *)
|
||
TYPE_ALLOC (ftype, nparams * sizeof (struct field));
|
||
|
||
child_die = die->next;
|
||
while (child_die && child_die->tag)
|
||
{
|
||
if (child_die->tag == DW_TAG_formal_parameter)
|
||
{
|
||
/* Dwarf2 has no clean way to discern C++ static and non-static
|
||
member functions. G++ helps GDB by marking the first
|
||
parameter for non-static member functions (which is the
|
||
this pointer) as artificial. We pass this information
|
||
to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
|
||
attr = dwarf_attr (child_die, DW_AT_artificial);
|
||
if (attr)
|
||
TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
|
||
else
|
||
TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
|
||
TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, objfile,
|
||
cu_header);
|
||
iparams++;
|
||
}
|
||
child_die = sibling_die (child_die);
|
||
}
|
||
}
|
||
|
||
die->type = ftype;
|
||
}
|
||
|
||
static void
|
||
read_typedef (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct attribute *attr;
|
||
char *name = NULL;
|
||
|
||
if (!die->type)
|
||
{
|
||
attr = dwarf_attr (die, DW_AT_name);
|
||
if (attr && DW_STRING (attr))
|
||
{
|
||
name = DW_STRING (attr);
|
||
}
|
||
die->type = init_type (TYPE_CODE_TYPEDEF, 0, TYPE_FLAG_TARGET_STUB, name, objfile);
|
||
TYPE_TARGET_TYPE (die->type) = die_type (die, objfile, cu_header);
|
||
}
|
||
}
|
||
|
||
/* Find a representation of a given base type and install
|
||
it in the TYPE field of the die. */
|
||
|
||
static void
|
||
read_base_type (struct die_info *die, struct objfile *objfile)
|
||
{
|
||
struct type *type;
|
||
struct attribute *attr;
|
||
int encoding = 0, size = 0;
|
||
|
||
/* If we've already decoded this die, this is a no-op. */
|
||
if (die->type)
|
||
{
|
||
return;
|
||
}
|
||
|
||
attr = dwarf_attr (die, DW_AT_encoding);
|
||
if (attr)
|
||
{
|
||
encoding = DW_UNSND (attr);
|
||
}
|
||
attr = dwarf_attr (die, DW_AT_byte_size);
|
||
if (attr)
|
||
{
|
||
size = DW_UNSND (attr);
|
||
}
|
||
attr = dwarf_attr (die, DW_AT_name);
|
||
if (attr && DW_STRING (attr))
|
||
{
|
||
enum type_code code = TYPE_CODE_INT;
|
||
int type_flags = 0;
|
||
|
||
switch (encoding)
|
||
{
|
||
case DW_ATE_address:
|
||
/* Turn DW_ATE_address into a void * pointer. */
|
||
code = TYPE_CODE_PTR;
|
||
type_flags |= TYPE_FLAG_UNSIGNED;
|
||
break;
|
||
case DW_ATE_boolean:
|
||
code = TYPE_CODE_BOOL;
|
||
type_flags |= TYPE_FLAG_UNSIGNED;
|
||
break;
|
||
case DW_ATE_complex_float:
|
||
code = TYPE_CODE_COMPLEX;
|
||
break;
|
||
case DW_ATE_float:
|
||
code = TYPE_CODE_FLT;
|
||
break;
|
||
case DW_ATE_signed:
|
||
case DW_ATE_signed_char:
|
||
break;
|
||
case DW_ATE_unsigned:
|
||
case DW_ATE_unsigned_char:
|
||
type_flags |= TYPE_FLAG_UNSIGNED;
|
||
break;
|
||
default:
|
||
complaint (&symfile_complaints, "unsupported DW_AT_encoding: '%s'",
|
||
dwarf_type_encoding_name (encoding));
|
||
break;
|
||
}
|
||
type = init_type (code, size, type_flags, DW_STRING (attr), objfile);
|
||
if (encoding == DW_ATE_address)
|
||
TYPE_TARGET_TYPE (type) = dwarf2_fundamental_type (objfile, FT_VOID);
|
||
else if (encoding == DW_ATE_complex_float)
|
||
{
|
||
if (size == 32)
|
||
TYPE_TARGET_TYPE (type)
|
||
= dwarf2_fundamental_type (objfile, FT_EXT_PREC_FLOAT);
|
||
else if (size == 16)
|
||
TYPE_TARGET_TYPE (type)
|
||
= dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT);
|
||
else if (size == 8)
|
||
TYPE_TARGET_TYPE (type)
|
||
= dwarf2_fundamental_type (objfile, FT_FLOAT);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
type = dwarf_base_type (encoding, size, objfile);
|
||
}
|
||
die->type = type;
|
||
}
|
||
|
||
/* Read a whole compilation unit into a linked list of dies. */
|
||
|
||
static struct die_info *
|
||
read_comp_unit (char *info_ptr, bfd *abfd,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct die_info *first_die, *last_die, *die;
|
||
char *cur_ptr;
|
||
int nesting_level;
|
||
|
||
/* Reset die reference table; we are
|
||
building new ones now. */
|
||
dwarf2_empty_hash_tables ();
|
||
|
||
cur_ptr = info_ptr;
|
||
nesting_level = 0;
|
||
first_die = last_die = NULL;
|
||
do
|
||
{
|
||
cur_ptr = read_full_die (&die, abfd, cur_ptr, cu_header);
|
||
if (die->has_children)
|
||
{
|
||
nesting_level++;
|
||
}
|
||
if (die->tag == 0)
|
||
{
|
||
nesting_level--;
|
||
}
|
||
|
||
die->next = NULL;
|
||
|
||
/* Enter die in reference hash table */
|
||
store_in_ref_table (die->offset, die);
|
||
|
||
if (!first_die)
|
||
{
|
||
first_die = last_die = die;
|
||
}
|
||
else
|
||
{
|
||
last_die->next = die;
|
||
last_die = die;
|
||
}
|
||
}
|
||
while (nesting_level > 0);
|
||
return first_die;
|
||
}
|
||
|
||
/* Free a linked list of dies. */
|
||
|
||
static void
|
||
free_die_list (struct die_info *dies)
|
||
{
|
||
struct die_info *die, *next;
|
||
|
||
die = dies;
|
||
while (die)
|
||
{
|
||
next = die->next;
|
||
xfree (die->attrs);
|
||
xfree (die);
|
||
die = next;
|
||
}
|
||
}
|
||
|
||
static void
|
||
do_free_die_list_cleanup (void *dies)
|
||
{
|
||
free_die_list (dies);
|
||
}
|
||
|
||
static struct cleanup *
|
||
make_cleanup_free_die_list (struct die_info *dies)
|
||
{
|
||
return make_cleanup (do_free_die_list_cleanup, dies);
|
||
}
|
||
|
||
|
||
/* Read the contents of the section at OFFSET and of size SIZE from the
|
||
object file specified by OBJFILE into the psymbol_obstack and return it. */
|
||
|
||
char *
|
||
dwarf2_read_section (struct objfile *objfile, file_ptr offset,
|
||
unsigned int size, asection *sectp)
|
||
{
|
||
bfd *abfd = objfile->obfd;
|
||
char *buf, *retbuf;
|
||
|
||
if (size == 0)
|
||
return NULL;
|
||
|
||
buf = (char *) obstack_alloc (&objfile->psymbol_obstack, size);
|
||
retbuf
|
||
= (char *) symfile_relocate_debug_section (abfd, sectp, (bfd_byte *) buf);
|
||
if (retbuf != NULL)
|
||
return retbuf;
|
||
|
||
if ((bfd_seek (abfd, offset, SEEK_SET) != 0) ||
|
||
(bfd_bread (buf, size, abfd) != size))
|
||
{
|
||
buf = NULL;
|
||
error ("Dwarf Error: Can't read DWARF data from '%s'",
|
||
bfd_get_filename (abfd));
|
||
}
|
||
return buf;
|
||
}
|
||
|
||
/* In DWARF version 2, the description of the debugging information is
|
||
stored in a separate .debug_abbrev section. Before we read any
|
||
dies from a section we read in all abbreviations and install them
|
||
in a hash table. */
|
||
|
||
static void
|
||
dwarf2_read_abbrevs (bfd *abfd, struct comp_unit_head *cu_header)
|
||
{
|
||
char *abbrev_ptr;
|
||
struct abbrev_info *cur_abbrev;
|
||
unsigned int abbrev_number, bytes_read, abbrev_name;
|
||
unsigned int abbrev_form, hash_number;
|
||
|
||
/* Initialize dwarf2 abbrevs */
|
||
memset (cu_header->dwarf2_abbrevs, 0,
|
||
ABBREV_HASH_SIZE*sizeof (struct abbrev_info *));
|
||
|
||
abbrev_ptr = dwarf_abbrev_buffer + cu_header->abbrev_offset;
|
||
abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
|
||
abbrev_ptr += bytes_read;
|
||
|
||
/* loop until we reach an abbrev number of 0 */
|
||
while (abbrev_number)
|
||
{
|
||
cur_abbrev = dwarf_alloc_abbrev ();
|
||
|
||
/* read in abbrev header */
|
||
cur_abbrev->number = abbrev_number;
|
||
cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
|
||
abbrev_ptr += bytes_read;
|
||
cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
|
||
abbrev_ptr += 1;
|
||
|
||
/* now read in declarations */
|
||
abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
|
||
abbrev_ptr += bytes_read;
|
||
abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
|
||
abbrev_ptr += bytes_read;
|
||
while (abbrev_name)
|
||
{
|
||
if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0)
|
||
{
|
||
cur_abbrev->attrs = (struct attr_abbrev *)
|
||
xrealloc (cur_abbrev->attrs,
|
||
(cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK)
|
||
* sizeof (struct attr_abbrev));
|
||
}
|
||
cur_abbrev->attrs[cur_abbrev->num_attrs].name = abbrev_name;
|
||
cur_abbrev->attrs[cur_abbrev->num_attrs++].form = abbrev_form;
|
||
abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
|
||
abbrev_ptr += bytes_read;
|
||
abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
|
||
abbrev_ptr += bytes_read;
|
||
}
|
||
|
||
hash_number = abbrev_number % ABBREV_HASH_SIZE;
|
||
cur_abbrev->next = cu_header->dwarf2_abbrevs[hash_number];
|
||
cu_header->dwarf2_abbrevs[hash_number] = cur_abbrev;
|
||
|
||
/* Get next abbreviation.
|
||
Under Irix6 the abbreviations for a compilation unit are not
|
||
always properly terminated with an abbrev number of 0.
|
||
Exit loop if we encounter an abbreviation which we have
|
||
already read (which means we are about to read the abbreviations
|
||
for the next compile unit) or if the end of the abbreviation
|
||
table is reached. */
|
||
if ((unsigned int) (abbrev_ptr - dwarf_abbrev_buffer)
|
||
>= dwarf_abbrev_size)
|
||
break;
|
||
abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
|
||
abbrev_ptr += bytes_read;
|
||
if (dwarf2_lookup_abbrev (abbrev_number, cu_header) != NULL)
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Empty the abbrev table for a new compilation unit. */
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
dwarf2_empty_abbrev_table (void *ptr_to_abbrevs_table)
|
||
{
|
||
int i;
|
||
struct abbrev_info *abbrev, *next;
|
||
struct abbrev_info **abbrevs;
|
||
|
||
abbrevs = (struct abbrev_info **)ptr_to_abbrevs_table;
|
||
|
||
for (i = 0; i < ABBREV_HASH_SIZE; ++i)
|
||
{
|
||
next = NULL;
|
||
abbrev = abbrevs[i];
|
||
while (abbrev)
|
||
{
|
||
next = abbrev->next;
|
||
xfree (abbrev->attrs);
|
||
xfree (abbrev);
|
||
abbrev = next;
|
||
}
|
||
abbrevs[i] = NULL;
|
||
}
|
||
}
|
||
|
||
/* Lookup an abbrev_info structure in the abbrev hash table. */
|
||
|
||
static struct abbrev_info *
|
||
dwarf2_lookup_abbrev (unsigned int number, const struct comp_unit_head *cu_header)
|
||
{
|
||
unsigned int hash_number;
|
||
struct abbrev_info *abbrev;
|
||
|
||
hash_number = number % ABBREV_HASH_SIZE;
|
||
abbrev = cu_header->dwarf2_abbrevs[hash_number];
|
||
|
||
while (abbrev)
|
||
{
|
||
if (abbrev->number == number)
|
||
return abbrev;
|
||
else
|
||
abbrev = abbrev->next;
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
/* Read a minimal amount of information into the minimal die structure. */
|
||
|
||
static char *
|
||
read_partial_die (struct partial_die_info *part_die, bfd *abfd,
|
||
char *info_ptr, const struct comp_unit_head *cu_header)
|
||
{
|
||
unsigned int abbrev_number, bytes_read, i;
|
||
struct abbrev_info *abbrev;
|
||
struct attribute attr;
|
||
struct attribute spec_attr;
|
||
int found_spec_attr = 0;
|
||
int has_low_pc_attr = 0;
|
||
int has_high_pc_attr = 0;
|
||
|
||
*part_die = zeroed_partial_die;
|
||
abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
|
||
info_ptr += bytes_read;
|
||
if (!abbrev_number)
|
||
return info_ptr;
|
||
|
||
abbrev = dwarf2_lookup_abbrev (abbrev_number, cu_header);
|
||
if (!abbrev)
|
||
{
|
||
error ("Dwarf Error: Could not find abbrev number %d [in module %s]", abbrev_number,
|
||
bfd_get_filename (abfd));
|
||
}
|
||
part_die->offset = info_ptr - dwarf_info_buffer;
|
||
part_die->tag = abbrev->tag;
|
||
part_die->has_children = abbrev->has_children;
|
||
part_die->abbrev = abbrev_number;
|
||
|
||
for (i = 0; i < abbrev->num_attrs; ++i)
|
||
{
|
||
info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd,
|
||
info_ptr, cu_header);
|
||
|
||
/* Store the data if it is of an attribute we want to keep in a
|
||
partial symbol table. */
|
||
switch (attr.name)
|
||
{
|
||
case DW_AT_name:
|
||
|
||
/* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
|
||
if (part_die->name == NULL)
|
||
part_die->name = DW_STRING (&attr);
|
||
break;
|
||
case DW_AT_MIPS_linkage_name:
|
||
part_die->name = DW_STRING (&attr);
|
||
break;
|
||
case DW_AT_low_pc:
|
||
has_low_pc_attr = 1;
|
||
part_die->lowpc = DW_ADDR (&attr);
|
||
break;
|
||
case DW_AT_high_pc:
|
||
has_high_pc_attr = 1;
|
||
part_die->highpc = DW_ADDR (&attr);
|
||
break;
|
||
case DW_AT_location:
|
||
/* Support the .debug_loc offsets */
|
||
if (attr_form_is_block (&attr))
|
||
{
|
||
part_die->locdesc = DW_BLOCK (&attr);
|
||
}
|
||
else if (attr.form == DW_FORM_data4 || attr.form == DW_FORM_data8)
|
||
{
|
||
dwarf2_complex_location_expr_complaint ();
|
||
}
|
||
else
|
||
{
|
||
dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
|
||
"partial symbol information");
|
||
}
|
||
break;
|
||
case DW_AT_language:
|
||
part_die->language = DW_UNSND (&attr);
|
||
break;
|
||
case DW_AT_external:
|
||
part_die->is_external = DW_UNSND (&attr);
|
||
break;
|
||
case DW_AT_declaration:
|
||
part_die->is_declaration = DW_UNSND (&attr);
|
||
break;
|
||
case DW_AT_type:
|
||
part_die->has_type = 1;
|
||
break;
|
||
case DW_AT_abstract_origin:
|
||
case DW_AT_specification:
|
||
found_spec_attr = 1;
|
||
spec_attr = attr;
|
||
break;
|
||
case DW_AT_sibling:
|
||
/* Ignore absolute siblings, they might point outside of
|
||
the current compile unit. */
|
||
if (attr.form == DW_FORM_ref_addr)
|
||
complaint (&symfile_complaints, "ignoring absolute DW_AT_sibling");
|
||
else
|
||
part_die->sibling =
|
||
dwarf_info_buffer + dwarf2_get_ref_die_offset (&attr);
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* If we found a reference attribute and the die has no name, try
|
||
to find a name in the referred to die. */
|
||
|
||
if (found_spec_attr && part_die->name == NULL)
|
||
{
|
||
struct partial_die_info spec_die;
|
||
char *spec_ptr;
|
||
int dummy;
|
||
|
||
spec_ptr = dwarf_info_buffer + dwarf2_get_ref_die_offset (&spec_attr);
|
||
read_partial_die (&spec_die, abfd, spec_ptr, cu_header);
|
||
if (spec_die.name)
|
||
{
|
||
part_die->name = spec_die.name;
|
||
|
||
/* Copy DW_AT_external attribute if it is set. */
|
||
if (spec_die.is_external)
|
||
part_die->is_external = spec_die.is_external;
|
||
}
|
||
}
|
||
|
||
/* When using the GNU linker, .gnu.linkonce. sections are used to
|
||
eliminate duplicate copies of functions and vtables and such.
|
||
The linker will arbitrarily choose one and discard the others.
|
||
The AT_*_pc values for such functions refer to local labels in
|
||
these sections. If the section from that file was discarded, the
|
||
labels are not in the output, so the relocs get a value of 0.
|
||
If this is a discarded function, mark the pc bounds as invalid,
|
||
so that GDB will ignore it. */
|
||
if (has_low_pc_attr && has_high_pc_attr
|
||
&& part_die->lowpc < part_die->highpc
|
||
&& (part_die->lowpc != 0
|
||
|| (bfd_get_file_flags (abfd) & HAS_RELOC)))
|
||
part_die->has_pc_info = 1;
|
||
return info_ptr;
|
||
}
|
||
|
||
/* Read the die from the .debug_info section buffer. And set diep to
|
||
point to a newly allocated die with its information. */
|
||
|
||
static char *
|
||
read_full_die (struct die_info **diep, bfd *abfd, char *info_ptr,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
unsigned int abbrev_number, bytes_read, i, offset;
|
||
struct abbrev_info *abbrev;
|
||
struct die_info *die;
|
||
|
||
offset = info_ptr - dwarf_info_buffer;
|
||
abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
|
||
info_ptr += bytes_read;
|
||
if (!abbrev_number)
|
||
{
|
||
die = dwarf_alloc_die ();
|
||
die->tag = 0;
|
||
die->abbrev = abbrev_number;
|
||
die->type = NULL;
|
||
*diep = die;
|
||
return info_ptr;
|
||
}
|
||
|
||
abbrev = dwarf2_lookup_abbrev (abbrev_number, cu_header);
|
||
if (!abbrev)
|
||
{
|
||
error ("Dwarf Error: could not find abbrev number %d [in module %s]", abbrev_number,
|
||
bfd_get_filename (abfd));
|
||
}
|
||
die = dwarf_alloc_die ();
|
||
die->offset = offset;
|
||
die->tag = abbrev->tag;
|
||
die->has_children = abbrev->has_children;
|
||
die->abbrev = abbrev_number;
|
||
die->type = NULL;
|
||
|
||
die->num_attrs = abbrev->num_attrs;
|
||
die->attrs = (struct attribute *)
|
||
xmalloc (die->num_attrs * sizeof (struct attribute));
|
||
|
||
for (i = 0; i < abbrev->num_attrs; ++i)
|
||
{
|
||
info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
|
||
abfd, info_ptr, cu_header);
|
||
}
|
||
|
||
*diep = die;
|
||
return info_ptr;
|
||
}
|
||
|
||
/* Read an attribute value described by an attribute form. */
|
||
|
||
static char *
|
||
read_attribute_value (struct attribute *attr, unsigned form,
|
||
bfd *abfd, char *info_ptr,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
unsigned int bytes_read;
|
||
struct dwarf_block *blk;
|
||
|
||
attr->form = form;
|
||
switch (form)
|
||
{
|
||
case DW_FORM_addr:
|
||
case DW_FORM_ref_addr:
|
||
DW_ADDR (attr) = read_address (abfd, info_ptr, cu_header, &bytes_read);
|
||
info_ptr += bytes_read;
|
||
break;
|
||
case DW_FORM_block2:
|
||
blk = dwarf_alloc_block ();
|
||
blk->size = read_2_bytes (abfd, info_ptr);
|
||
info_ptr += 2;
|
||
blk->data = read_n_bytes (abfd, info_ptr, blk->size);
|
||
info_ptr += blk->size;
|
||
DW_BLOCK (attr) = blk;
|
||
break;
|
||
case DW_FORM_block4:
|
||
blk = dwarf_alloc_block ();
|
||
blk->size = read_4_bytes (abfd, info_ptr);
|
||
info_ptr += 4;
|
||
blk->data = read_n_bytes (abfd, info_ptr, blk->size);
|
||
info_ptr += blk->size;
|
||
DW_BLOCK (attr) = blk;
|
||
break;
|
||
case DW_FORM_data2:
|
||
DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
|
||
info_ptr += 2;
|
||
break;
|
||
case DW_FORM_data4:
|
||
DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
|
||
info_ptr += 4;
|
||
break;
|
||
case DW_FORM_data8:
|
||
DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
|
||
info_ptr += 8;
|
||
break;
|
||
case DW_FORM_string:
|
||
DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
|
||
info_ptr += bytes_read;
|
||
break;
|
||
case DW_FORM_strp:
|
||
DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
|
||
&bytes_read);
|
||
info_ptr += bytes_read;
|
||
break;
|
||
case DW_FORM_block:
|
||
blk = dwarf_alloc_block ();
|
||
blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
|
||
info_ptr += bytes_read;
|
||
blk->data = read_n_bytes (abfd, info_ptr, blk->size);
|
||
info_ptr += blk->size;
|
||
DW_BLOCK (attr) = blk;
|
||
break;
|
||
case DW_FORM_block1:
|
||
blk = dwarf_alloc_block ();
|
||
blk->size = read_1_byte (abfd, info_ptr);
|
||
info_ptr += 1;
|
||
blk->data = read_n_bytes (abfd, info_ptr, blk->size);
|
||
info_ptr += blk->size;
|
||
DW_BLOCK (attr) = blk;
|
||
break;
|
||
case DW_FORM_data1:
|
||
DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
|
||
info_ptr += 1;
|
||
break;
|
||
case DW_FORM_flag:
|
||
DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
|
||
info_ptr += 1;
|
||
break;
|
||
case DW_FORM_sdata:
|
||
DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
|
||
info_ptr += bytes_read;
|
||
break;
|
||
case DW_FORM_udata:
|
||
DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
|
||
info_ptr += bytes_read;
|
||
break;
|
||
case DW_FORM_ref1:
|
||
DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
|
||
info_ptr += 1;
|
||
break;
|
||
case DW_FORM_ref2:
|
||
DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
|
||
info_ptr += 2;
|
||
break;
|
||
case DW_FORM_ref4:
|
||
DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
|
||
info_ptr += 4;
|
||
break;
|
||
case DW_FORM_ref8:
|
||
DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
|
||
info_ptr += 8;
|
||
break;
|
||
case DW_FORM_ref_udata:
|
||
DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
|
||
info_ptr += bytes_read;
|
||
break;
|
||
case DW_FORM_indirect:
|
||
form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
|
||
info_ptr += bytes_read;
|
||
info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu_header);
|
||
break;
|
||
default:
|
||
error ("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]",
|
||
dwarf_form_name (form),
|
||
bfd_get_filename (abfd));
|
||
}
|
||
return info_ptr;
|
||
}
|
||
|
||
/* Read an attribute described by an abbreviated attribute. */
|
||
|
||
static char *
|
||
read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
|
||
bfd *abfd, char *info_ptr,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
attr->name = abbrev->name;
|
||
return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu_header);
|
||
}
|
||
|
||
/* read dwarf information from a buffer */
|
||
|
||
static unsigned int
|
||
read_1_byte (bfd *abfd, char *buf)
|
||
{
|
||
return bfd_get_8 (abfd, (bfd_byte *) buf);
|
||
}
|
||
|
||
static int
|
||
read_1_signed_byte (bfd *abfd, char *buf)
|
||
{
|
||
return bfd_get_signed_8 (abfd, (bfd_byte *) buf);
|
||
}
|
||
|
||
static unsigned int
|
||
read_2_bytes (bfd *abfd, char *buf)
|
||
{
|
||
return bfd_get_16 (abfd, (bfd_byte *) buf);
|
||
}
|
||
|
||
static int
|
||
read_2_signed_bytes (bfd *abfd, char *buf)
|
||
{
|
||
return bfd_get_signed_16 (abfd, (bfd_byte *) buf);
|
||
}
|
||
|
||
static unsigned int
|
||
read_4_bytes (bfd *abfd, char *buf)
|
||
{
|
||
return bfd_get_32 (abfd, (bfd_byte *) buf);
|
||
}
|
||
|
||
static int
|
||
read_4_signed_bytes (bfd *abfd, char *buf)
|
||
{
|
||
return bfd_get_signed_32 (abfd, (bfd_byte *) buf);
|
||
}
|
||
|
||
static unsigned long
|
||
read_8_bytes (bfd *abfd, char *buf)
|
||
{
|
||
return bfd_get_64 (abfd, (bfd_byte *) buf);
|
||
}
|
||
|
||
static CORE_ADDR
|
||
read_address (bfd *abfd, char *buf, const struct comp_unit_head *cu_header,
|
||
int *bytes_read)
|
||
{
|
||
CORE_ADDR retval = 0;
|
||
|
||
if (cu_header->signed_addr_p)
|
||
{
|
||
switch (cu_header->addr_size)
|
||
{
|
||
case 2:
|
||
retval = bfd_get_signed_16 (abfd, (bfd_byte *) buf);
|
||
break;
|
||
case 4:
|
||
retval = bfd_get_signed_32 (abfd, (bfd_byte *) buf);
|
||
break;
|
||
case 8:
|
||
retval = bfd_get_signed_64 (abfd, (bfd_byte *) buf);
|
||
break;
|
||
default:
|
||
internal_error (__FILE__, __LINE__,
|
||
"read_address: bad switch, signed [in module %s]",
|
||
bfd_get_filename (abfd));
|
||
}
|
||
}
|
||
else
|
||
{
|
||
switch (cu_header->addr_size)
|
||
{
|
||
case 2:
|
||
retval = bfd_get_16 (abfd, (bfd_byte *) buf);
|
||
break;
|
||
case 4:
|
||
retval = bfd_get_32 (abfd, (bfd_byte *) buf);
|
||
break;
|
||
case 8:
|
||
retval = bfd_get_64 (abfd, (bfd_byte *) buf);
|
||
break;
|
||
default:
|
||
internal_error (__FILE__, __LINE__,
|
||
"read_address: bad switch, unsigned [in module %s]",
|
||
bfd_get_filename (abfd));
|
||
}
|
||
}
|
||
|
||
*bytes_read = cu_header->addr_size;
|
||
return retval;
|
||
}
|
||
|
||
/* Read the initial length from a section. The (draft) DWARF 3
|
||
specification allows the initial length to take up either 4 bytes
|
||
or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
|
||
bytes describe the length and all offsets will be 8 bytes in length
|
||
instead of 4.
|
||
|
||
An older, non-standard 64-bit format is also handled by this
|
||
function. The older format in question stores the initial length
|
||
as an 8-byte quantity without an escape value. Lengths greater
|
||
than 2^32 aren't very common which means that the initial 4 bytes
|
||
is almost always zero. Since a length value of zero doesn't make
|
||
sense for the 32-bit format, this initial zero can be considered to
|
||
be an escape value which indicates the presence of the older 64-bit
|
||
format. As written, the code can't detect (old format) lengths
|
||
greater than 4GB. If it becomes necessary to handle lengths somewhat
|
||
larger than 4GB, we could allow other small values (such as the
|
||
non-sensical values of 1, 2, and 3) to also be used as escape values
|
||
indicating the presence of the old format.
|
||
|
||
The value returned via bytes_read should be used to increment
|
||
the relevant pointer after calling read_initial_length().
|
||
|
||
As a side effect, this function sets the fields initial_length_size
|
||
and offset_size in cu_header to the values appropriate for the
|
||
length field. (The format of the initial length field determines
|
||
the width of file offsets to be fetched later with fetch_offset().)
|
||
|
||
[ Note: read_initial_length() and read_offset() are based on the
|
||
document entitled "DWARF Debugging Information Format", revision
|
||
3, draft 8, dated November 19, 2001. This document was obtained
|
||
from:
|
||
|
||
http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
|
||
|
||
This document is only a draft and is subject to change. (So beware.)
|
||
|
||
Details regarding the older, non-standard 64-bit format were
|
||
determined empirically by examining 64-bit ELF files produced
|
||
by the SGI toolchain on an IRIX 6.5 machine.
|
||
|
||
- Kevin, July 16, 2002
|
||
] */
|
||
|
||
static LONGEST
|
||
read_initial_length (bfd *abfd, char *buf, struct comp_unit_head *cu_header,
|
||
int *bytes_read)
|
||
{
|
||
LONGEST retval = 0;
|
||
|
||
retval = bfd_get_32 (abfd, (bfd_byte *) buf);
|
||
|
||
if (retval == 0xffffffff)
|
||
{
|
||
retval = bfd_get_64 (abfd, (bfd_byte *) buf + 4);
|
||
*bytes_read = 12;
|
||
if (cu_header != NULL)
|
||
{
|
||
cu_header->initial_length_size = 12;
|
||
cu_header->offset_size = 8;
|
||
}
|
||
}
|
||
else if (retval == 0)
|
||
{
|
||
/* Handle (non-standard) 64-bit DWARF2 formats such as that used
|
||
by IRIX. */
|
||
retval = bfd_get_64 (abfd, (bfd_byte *) buf);
|
||
*bytes_read = 8;
|
||
if (cu_header != NULL)
|
||
{
|
||
cu_header->initial_length_size = 8;
|
||
cu_header->offset_size = 8;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
*bytes_read = 4;
|
||
if (cu_header != NULL)
|
||
{
|
||
cu_header->initial_length_size = 4;
|
||
cu_header->offset_size = 4;
|
||
}
|
||
}
|
||
|
||
return retval;
|
||
}
|
||
|
||
/* Read an offset from the data stream. The size of the offset is
|
||
given by cu_header->offset_size. */
|
||
|
||
static LONGEST
|
||
read_offset (bfd *abfd, char *buf, const struct comp_unit_head *cu_header,
|
||
int *bytes_read)
|
||
{
|
||
LONGEST retval = 0;
|
||
|
||
switch (cu_header->offset_size)
|
||
{
|
||
case 4:
|
||
retval = bfd_get_32 (abfd, (bfd_byte *) buf);
|
||
*bytes_read = 4;
|
||
break;
|
||
case 8:
|
||
retval = bfd_get_64 (abfd, (bfd_byte *) buf);
|
||
*bytes_read = 8;
|
||
break;
|
||
default:
|
||
internal_error (__FILE__, __LINE__,
|
||
"read_offset: bad switch [in module %s]",
|
||
bfd_get_filename (abfd));
|
||
}
|
||
|
||
return retval;
|
||
}
|
||
|
||
static char *
|
||
read_n_bytes (bfd *abfd, char *buf, unsigned int size)
|
||
{
|
||
/* If the size of a host char is 8 bits, we can return a pointer
|
||
to the buffer, otherwise we have to copy the data to a buffer
|
||
allocated on the temporary obstack. */
|
||
gdb_assert (HOST_CHAR_BIT == 8);
|
||
return buf;
|
||
}
|
||
|
||
static char *
|
||
read_string (bfd *abfd, char *buf, unsigned int *bytes_read_ptr)
|
||
{
|
||
/* If the size of a host char is 8 bits, we can return a pointer
|
||
to the string, otherwise we have to copy the string to a buffer
|
||
allocated on the temporary obstack. */
|
||
gdb_assert (HOST_CHAR_BIT == 8);
|
||
if (*buf == '\0')
|
||
{
|
||
*bytes_read_ptr = 1;
|
||
return NULL;
|
||
}
|
||
*bytes_read_ptr = strlen (buf) + 1;
|
||
return buf;
|
||
}
|
||
|
||
static char *
|
||
read_indirect_string (bfd *abfd, char *buf,
|
||
const struct comp_unit_head *cu_header,
|
||
unsigned int *bytes_read_ptr)
|
||
{
|
||
LONGEST str_offset = read_offset (abfd, buf, cu_header,
|
||
(int *) bytes_read_ptr);
|
||
|
||
if (dwarf_str_buffer == NULL)
|
||
{
|
||
error ("DW_FORM_strp used without .debug_str section [in module %s]",
|
||
bfd_get_filename (abfd));
|
||
return NULL;
|
||
}
|
||
if (str_offset >= dwarf_str_size)
|
||
{
|
||
error ("DW_FORM_strp pointing outside of .debug_str section [in module %s]",
|
||
bfd_get_filename (abfd));
|
||
return NULL;
|
||
}
|
||
gdb_assert (HOST_CHAR_BIT == 8);
|
||
if (dwarf_str_buffer[str_offset] == '\0')
|
||
return NULL;
|
||
return dwarf_str_buffer + str_offset;
|
||
}
|
||
|
||
static unsigned long
|
||
read_unsigned_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr)
|
||
{
|
||
unsigned long result;
|
||
unsigned int num_read;
|
||
int i, shift;
|
||
unsigned char byte;
|
||
|
||
result = 0;
|
||
shift = 0;
|
||
num_read = 0;
|
||
i = 0;
|
||
while (1)
|
||
{
|
||
byte = bfd_get_8 (abfd, (bfd_byte *) buf);
|
||
buf++;
|
||
num_read++;
|
||
result |= ((unsigned long)(byte & 127) << shift);
|
||
if ((byte & 128) == 0)
|
||
{
|
||
break;
|
||
}
|
||
shift += 7;
|
||
}
|
||
*bytes_read_ptr = num_read;
|
||
return result;
|
||
}
|
||
|
||
static long
|
||
read_signed_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr)
|
||
{
|
||
long result;
|
||
int i, shift, size, num_read;
|
||
unsigned char byte;
|
||
|
||
result = 0;
|
||
shift = 0;
|
||
size = 32;
|
||
num_read = 0;
|
||
i = 0;
|
||
while (1)
|
||
{
|
||
byte = bfd_get_8 (abfd, (bfd_byte *) buf);
|
||
buf++;
|
||
num_read++;
|
||
result |= ((long)(byte & 127) << shift);
|
||
shift += 7;
|
||
if ((byte & 128) == 0)
|
||
{
|
||
break;
|
||
}
|
||
}
|
||
if ((shift < size) && (byte & 0x40))
|
||
{
|
||
result |= -(1 << shift);
|
||
}
|
||
*bytes_read_ptr = num_read;
|
||
return result;
|
||
}
|
||
|
||
static void
|
||
set_cu_language (unsigned int lang)
|
||
{
|
||
switch (lang)
|
||
{
|
||
case DW_LANG_C89:
|
||
case DW_LANG_C:
|
||
cu_language = language_c;
|
||
break;
|
||
case DW_LANG_C_plus_plus:
|
||
cu_language = language_cplus;
|
||
break;
|
||
case DW_LANG_Fortran77:
|
||
case DW_LANG_Fortran90:
|
||
case DW_LANG_Fortran95:
|
||
cu_language = language_fortran;
|
||
break;
|
||
case DW_LANG_Mips_Assembler:
|
||
cu_language = language_asm;
|
||
break;
|
||
case DW_LANG_Java:
|
||
cu_language = language_java;
|
||
break;
|
||
case DW_LANG_Ada83:
|
||
case DW_LANG_Ada95:
|
||
case DW_LANG_Cobol74:
|
||
case DW_LANG_Cobol85:
|
||
case DW_LANG_Pascal83:
|
||
case DW_LANG_Modula2:
|
||
default:
|
||
cu_language = language_minimal;
|
||
break;
|
||
}
|
||
cu_language_defn = language_def (cu_language);
|
||
}
|
||
|
||
/* Return the named attribute or NULL if not there. */
|
||
|
||
static struct attribute *
|
||
dwarf_attr (struct die_info *die, unsigned int name)
|
||
{
|
||
unsigned int i;
|
||
struct attribute *spec = NULL;
|
||
|
||
for (i = 0; i < die->num_attrs; ++i)
|
||
{
|
||
if (die->attrs[i].name == name)
|
||
{
|
||
return &die->attrs[i];
|
||
}
|
||
if (die->attrs[i].name == DW_AT_specification
|
||
|| die->attrs[i].name == DW_AT_abstract_origin)
|
||
spec = &die->attrs[i];
|
||
}
|
||
if (spec)
|
||
{
|
||
struct die_info *ref_die =
|
||
follow_die_ref (dwarf2_get_ref_die_offset (spec));
|
||
|
||
if (ref_die)
|
||
return dwarf_attr (ref_die, name);
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
static int
|
||
die_is_declaration (struct die_info *die)
|
||
{
|
||
return (dwarf_attr (die, DW_AT_declaration)
|
||
&& ! dwarf_attr (die, DW_AT_specification));
|
||
}
|
||
|
||
|
||
/* Free the line_header structure *LH, and any arrays and strings it
|
||
refers to. */
|
||
static void
|
||
free_line_header (struct line_header *lh)
|
||
{
|
||
if (lh->standard_opcode_lengths)
|
||
xfree (lh->standard_opcode_lengths);
|
||
|
||
/* Remember that all the lh->file_names[i].name pointers are
|
||
pointers into debug_line_buffer, and don't need to be freed. */
|
||
if (lh->file_names)
|
||
xfree (lh->file_names);
|
||
|
||
/* Similarly for the include directory names. */
|
||
if (lh->include_dirs)
|
||
xfree (lh->include_dirs);
|
||
|
||
xfree (lh);
|
||
}
|
||
|
||
|
||
/* Add an entry to LH's include directory table. */
|
||
static void
|
||
add_include_dir (struct line_header *lh, char *include_dir)
|
||
{
|
||
/* Grow the array if necessary. */
|
||
if (lh->include_dirs_size == 0)
|
||
{
|
||
lh->include_dirs_size = 1; /* for testing */
|
||
lh->include_dirs = xmalloc (lh->include_dirs_size
|
||
* sizeof (*lh->include_dirs));
|
||
}
|
||
else if (lh->num_include_dirs >= lh->include_dirs_size)
|
||
{
|
||
lh->include_dirs_size *= 2;
|
||
lh->include_dirs = xrealloc (lh->include_dirs,
|
||
(lh->include_dirs_size
|
||
* sizeof (*lh->include_dirs)));
|
||
}
|
||
|
||
lh->include_dirs[lh->num_include_dirs++] = include_dir;
|
||
}
|
||
|
||
|
||
/* Add an entry to LH's file name table. */
|
||
static void
|
||
add_file_name (struct line_header *lh,
|
||
char *name,
|
||
unsigned int dir_index,
|
||
unsigned int mod_time,
|
||
unsigned int length)
|
||
{
|
||
struct file_entry *fe;
|
||
|
||
/* Grow the array if necessary. */
|
||
if (lh->file_names_size == 0)
|
||
{
|
||
lh->file_names_size = 1; /* for testing */
|
||
lh->file_names = xmalloc (lh->file_names_size
|
||
* sizeof (*lh->file_names));
|
||
}
|
||
else if (lh->num_file_names >= lh->file_names_size)
|
||
{
|
||
lh->file_names_size *= 2;
|
||
lh->file_names = xrealloc (lh->file_names,
|
||
(lh->file_names_size
|
||
* sizeof (*lh->file_names)));
|
||
}
|
||
|
||
fe = &lh->file_names[lh->num_file_names++];
|
||
fe->name = name;
|
||
fe->dir_index = dir_index;
|
||
fe->mod_time = mod_time;
|
||
fe->length = length;
|
||
}
|
||
|
||
|
||
/* Read the statement program header starting at OFFSET in
|
||
dwarf_line_buffer, according to the endianness of ABFD. Return a
|
||
pointer to a struct line_header, allocated using xmalloc.
|
||
|
||
NOTE: the strings in the include directory and file name tables of
|
||
the returned object point into debug_line_buffer, and must not be
|
||
freed. */
|
||
static struct line_header *
|
||
dwarf_decode_line_header (unsigned int offset, bfd *abfd,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct cleanup *back_to;
|
||
struct line_header *lh;
|
||
char *line_ptr;
|
||
int bytes_read;
|
||
int i;
|
||
char *cur_dir, *cur_file;
|
||
|
||
if (dwarf_line_buffer == NULL)
|
||
{
|
||
complaint (&symfile_complaints, "missing .debug_line section");
|
||
return 0;
|
||
}
|
||
|
||
/* Make sure that at least there's room for the total_length field. That
|
||
could be 12 bytes long, but we're just going to fudge that. */
|
||
if (offset + 4 >= dwarf_line_size)
|
||
{
|
||
dwarf2_statement_list_fits_in_line_number_section_complaint ();
|
||
return 0;
|
||
}
|
||
|
||
lh = xmalloc (sizeof (*lh));
|
||
memset (lh, 0, sizeof (*lh));
|
||
back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
|
||
(void *) lh);
|
||
|
||
line_ptr = dwarf_line_buffer + offset;
|
||
|
||
/* read in the header */
|
||
lh->total_length = read_initial_length (abfd, line_ptr, NULL, &bytes_read);
|
||
line_ptr += bytes_read;
|
||
if (line_ptr + lh->total_length > dwarf_line_buffer + dwarf_line_size)
|
||
{
|
||
dwarf2_statement_list_fits_in_line_number_section_complaint ();
|
||
return 0;
|
||
}
|
||
lh->statement_program_end = line_ptr + lh->total_length;
|
||
lh->version = read_2_bytes (abfd, line_ptr);
|
||
line_ptr += 2;
|
||
lh->header_length = read_offset (abfd, line_ptr, cu_header, &bytes_read);
|
||
line_ptr += bytes_read;
|
||
lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
|
||
line_ptr += 1;
|
||
lh->default_is_stmt = read_1_byte (abfd, line_ptr);
|
||
line_ptr += 1;
|
||
lh->line_base = read_1_signed_byte (abfd, line_ptr);
|
||
line_ptr += 1;
|
||
lh->line_range = read_1_byte (abfd, line_ptr);
|
||
line_ptr += 1;
|
||
lh->opcode_base = read_1_byte (abfd, line_ptr);
|
||
line_ptr += 1;
|
||
lh->standard_opcode_lengths
|
||
= (unsigned char *) xmalloc (lh->opcode_base * sizeof (unsigned char));
|
||
|
||
lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
|
||
for (i = 1; i < lh->opcode_base; ++i)
|
||
{
|
||
lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
|
||
line_ptr += 1;
|
||
}
|
||
|
||
/* Read directory table */
|
||
while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
|
||
{
|
||
line_ptr += bytes_read;
|
||
add_include_dir (lh, cur_dir);
|
||
}
|
||
line_ptr += bytes_read;
|
||
|
||
/* Read file name table */
|
||
while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
|
||
{
|
||
unsigned int dir_index, mod_time, length;
|
||
|
||
line_ptr += bytes_read;
|
||
dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
|
||
line_ptr += bytes_read;
|
||
mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
|
||
line_ptr += bytes_read;
|
||
length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
|
||
line_ptr += bytes_read;
|
||
|
||
add_file_name (lh, cur_file, dir_index, mod_time, length);
|
||
}
|
||
line_ptr += bytes_read;
|
||
lh->statement_program_start = line_ptr;
|
||
|
||
if (line_ptr > dwarf_line_buffer + dwarf_line_size)
|
||
complaint (&symfile_complaints,
|
||
"line number info header doesn't fit in `.debug_line' section");
|
||
|
||
discard_cleanups (back_to);
|
||
return lh;
|
||
}
|
||
|
||
/* This function exists to work around a bug in certain compilers
|
||
(particularly GCC 2.95), in which the first line number marker of a
|
||
function does not show up until after the prologue, right before
|
||
the second line number marker. This function shifts ADDRESS down
|
||
to the beginning of the function if necessary, and is called on
|
||
addresses passed to record_line. */
|
||
|
||
static CORE_ADDR
|
||
check_cu_functions (CORE_ADDR address)
|
||
{
|
||
struct function_range *fn;
|
||
|
||
/* Find the function_range containing address. */
|
||
if (!cu_first_fn)
|
||
return address;
|
||
|
||
if (!cu_cached_fn)
|
||
cu_cached_fn = cu_first_fn;
|
||
|
||
fn = cu_cached_fn;
|
||
while (fn)
|
||
if (fn->lowpc <= address && fn->highpc > address)
|
||
goto found;
|
||
else
|
||
fn = fn->next;
|
||
|
||
fn = cu_first_fn;
|
||
while (fn && fn != cu_cached_fn)
|
||
if (fn->lowpc <= address && fn->highpc > address)
|
||
goto found;
|
||
else
|
||
fn = fn->next;
|
||
|
||
return address;
|
||
|
||
found:
|
||
if (fn->seen_line)
|
||
return address;
|
||
if (address != fn->lowpc)
|
||
complaint (&symfile_complaints,
|
||
"misplaced first line number at 0x%lx for '%s'",
|
||
(unsigned long) address, fn->name);
|
||
fn->seen_line = 1;
|
||
return fn->lowpc;
|
||
}
|
||
|
||
/* Decode the line number information for the compilation unit whose
|
||
line number info is at OFFSET in the .debug_line section.
|
||
The compilation directory of the file is passed in COMP_DIR. */
|
||
|
||
static void
|
||
dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
char *line_ptr;
|
||
char *line_end;
|
||
unsigned int i, bytes_read;
|
||
char *cur_dir;
|
||
unsigned char op_code, extended_op, adj_opcode;
|
||
|
||
line_ptr = lh->statement_program_start;
|
||
line_end = lh->statement_program_end;
|
||
|
||
/* Read the statement sequences until there's nothing left. */
|
||
while (line_ptr < line_end)
|
||
{
|
||
/* state machine registers */
|
||
CORE_ADDR address = 0;
|
||
unsigned int file = 1;
|
||
unsigned int line = 1;
|
||
unsigned int column = 0;
|
||
int is_stmt = lh->default_is_stmt;
|
||
int basic_block = 0;
|
||
int end_sequence = 0;
|
||
|
||
/* Start a subfile for the current file of the state machine. */
|
||
if (lh->num_file_names >= file)
|
||
{
|
||
/* lh->include_dirs and lh->file_names are 0-based, but the
|
||
directory and file name numbers in the statement program
|
||
are 1-based. */
|
||
struct file_entry *fe = &lh->file_names[file - 1];
|
||
char *dir;
|
||
if (fe->dir_index)
|
||
dir = lh->include_dirs[fe->dir_index - 1];
|
||
else
|
||
dir = comp_dir;
|
||
dwarf2_start_subfile (fe->name, dir);
|
||
}
|
||
|
||
/* Decode the table. */
|
||
while (!end_sequence)
|
||
{
|
||
op_code = read_1_byte (abfd, line_ptr);
|
||
line_ptr += 1;
|
||
|
||
if (op_code >= lh->opcode_base)
|
||
{ /* Special operand. */
|
||
adj_opcode = op_code - lh->opcode_base;
|
||
address += (adj_opcode / lh->line_range)
|
||
* lh->minimum_instruction_length;
|
||
line += lh->line_base + (adj_opcode % lh->line_range);
|
||
/* append row to matrix using current values */
|
||
record_line (current_subfile, line,
|
||
check_cu_functions (address));
|
||
basic_block = 1;
|
||
}
|
||
else switch (op_code)
|
||
{
|
||
case DW_LNS_extended_op:
|
||
line_ptr += 1; /* ignore length */
|
||
extended_op = read_1_byte (abfd, line_ptr);
|
||
line_ptr += 1;
|
||
switch (extended_op)
|
||
{
|
||
case DW_LNE_end_sequence:
|
||
end_sequence = 1;
|
||
record_line (current_subfile, 0, address);
|
||
break;
|
||
case DW_LNE_set_address:
|
||
address = read_address (abfd, line_ptr, cu_header, &bytes_read);
|
||
line_ptr += bytes_read;
|
||
address += baseaddr;
|
||
break;
|
||
case DW_LNE_define_file:
|
||
{
|
||
char *cur_file;
|
||
unsigned int dir_index, mod_time, length;
|
||
|
||
cur_file = read_string (abfd, line_ptr, &bytes_read);
|
||
line_ptr += bytes_read;
|
||
dir_index =
|
||
read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
|
||
line_ptr += bytes_read;
|
||
mod_time =
|
||
read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
|
||
line_ptr += bytes_read;
|
||
length =
|
||
read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
|
||
line_ptr += bytes_read;
|
||
add_file_name (lh, cur_file, dir_index, mod_time, length);
|
||
}
|
||
break;
|
||
default:
|
||
complaint (&symfile_complaints,
|
||
"mangled .debug_line section");
|
||
return;
|
||
}
|
||
break;
|
||
case DW_LNS_copy:
|
||
record_line (current_subfile, line,
|
||
check_cu_functions (address));
|
||
basic_block = 0;
|
||
break;
|
||
case DW_LNS_advance_pc:
|
||
address += lh->minimum_instruction_length
|
||
* read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
|
||
line_ptr += bytes_read;
|
||
break;
|
||
case DW_LNS_advance_line:
|
||
line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
|
||
line_ptr += bytes_read;
|
||
break;
|
||
case DW_LNS_set_file:
|
||
{
|
||
/* lh->include_dirs and lh->file_names are 0-based,
|
||
but the directory and file name numbers in the
|
||
statement program are 1-based. */
|
||
struct file_entry *fe;
|
||
char *dir;
|
||
file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
|
||
line_ptr += bytes_read;
|
||
fe = &lh->file_names[file - 1];
|
||
if (fe->dir_index)
|
||
dir = lh->include_dirs[fe->dir_index - 1];
|
||
else
|
||
dir = comp_dir;
|
||
dwarf2_start_subfile (fe->name, dir);
|
||
}
|
||
break;
|
||
case DW_LNS_set_column:
|
||
column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
|
||
line_ptr += bytes_read;
|
||
break;
|
||
case DW_LNS_negate_stmt:
|
||
is_stmt = (!is_stmt);
|
||
break;
|
||
case DW_LNS_set_basic_block:
|
||
basic_block = 1;
|
||
break;
|
||
/* Add to the address register of the state machine the
|
||
address increment value corresponding to special opcode
|
||
255. Ie, this value is scaled by the minimum instruction
|
||
length since special opcode 255 would have scaled the
|
||
the increment. */
|
||
case DW_LNS_const_add_pc:
|
||
address += (lh->minimum_instruction_length
|
||
* ((255 - lh->opcode_base) / lh->line_range));
|
||
break;
|
||
case DW_LNS_fixed_advance_pc:
|
||
address += read_2_bytes (abfd, line_ptr);
|
||
line_ptr += 2;
|
||
break;
|
||
default:
|
||
{ /* Unknown standard opcode, ignore it. */
|
||
int i;
|
||
for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
|
||
{
|
||
(void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
|
||
line_ptr += bytes_read;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Start a subfile for DWARF. FILENAME is the name of the file and
|
||
DIRNAME the name of the source directory which contains FILENAME
|
||
or NULL if not known.
|
||
This routine tries to keep line numbers from identical absolute and
|
||
relative file names in a common subfile.
|
||
|
||
Using the `list' example from the GDB testsuite, which resides in
|
||
/srcdir and compiling it with Irix6.2 cc in /compdir using a filename
|
||
of /srcdir/list0.c yields the following debugging information for list0.c:
|
||
|
||
DW_AT_name: /srcdir/list0.c
|
||
DW_AT_comp_dir: /compdir
|
||
files.files[0].name: list0.h
|
||
files.files[0].dir: /srcdir
|
||
files.files[1].name: list0.c
|
||
files.files[1].dir: /srcdir
|
||
|
||
The line number information for list0.c has to end up in a single
|
||
subfile, so that `break /srcdir/list0.c:1' works as expected. */
|
||
|
||
static void
|
||
dwarf2_start_subfile (char *filename, char *dirname)
|
||
{
|
||
/* If the filename isn't absolute, try to match an existing subfile
|
||
with the full pathname. */
|
||
|
||
if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
|
||
{
|
||
struct subfile *subfile;
|
||
char *fullname = concat (dirname, "/", filename, NULL);
|
||
|
||
for (subfile = subfiles; subfile; subfile = subfile->next)
|
||
{
|
||
if (FILENAME_CMP (subfile->name, fullname) == 0)
|
||
{
|
||
current_subfile = subfile;
|
||
xfree (fullname);
|
||
return;
|
||
}
|
||
}
|
||
xfree (fullname);
|
||
}
|
||
start_subfile (filename, dirname);
|
||
}
|
||
|
||
static void
|
||
var_decode_location (struct attribute *attr, struct symbol *sym,
|
||
struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
/* NOTE drow/2003-01-30: There used to be a comment and some special
|
||
code here to turn a symbol with DW_AT_external and a
|
||
SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
|
||
necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
|
||
with some versions of binutils) where shared libraries could have
|
||
relocations against symbols in their debug information - the
|
||
minimal symbol would have the right address, but the debug info
|
||
would not. It's no longer necessary, because we will explicitly
|
||
apply relocations when we read in the debug information now. */
|
||
|
||
/* A DW_AT_location attribute with no contents indicates that a
|
||
variable has been optimized away. */
|
||
if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
|
||
{
|
||
SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
|
||
return;
|
||
}
|
||
|
||
/* Handle one degenerate form of location expression specially, to
|
||
preserve GDB's previous behavior when section offsets are
|
||
specified. If this is just a DW_OP_addr then mark this symbol
|
||
as LOC_STATIC. */
|
||
|
||
if (attr_form_is_block (attr)
|
||
&& DW_BLOCK (attr)->size == 1 + cu_header->addr_size
|
||
&& DW_BLOCK (attr)->data[0] == DW_OP_addr)
|
||
{
|
||
int dummy;
|
||
|
||
SYMBOL_VALUE_ADDRESS (sym) =
|
||
read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu_header,
|
||
&dummy);
|
||
fixup_symbol_section (sym, objfile);
|
||
SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
|
||
SYMBOL_SECTION (sym));
|
||
SYMBOL_CLASS (sym) = LOC_STATIC;
|
||
return;
|
||
}
|
||
|
||
/* NOTE drow/2002-01-30: It might be worthwhile to have a static
|
||
expression evaluator, and use LOC_COMPUTED only when necessary
|
||
(i.e. when the value of a register or memory location is
|
||
referenced, or a thread-local block, etc.). Then again, it might
|
||
not be worthwhile. I'm assuming that it isn't unless performance
|
||
or memory numbers show me otherwise. */
|
||
|
||
dwarf2_symbol_mark_computed (attr, sym, cu_header, objfile);
|
||
SYMBOL_CLASS (sym) = LOC_COMPUTED;
|
||
}
|
||
|
||
/* Given a pointer to a DWARF information entry, figure out if we need
|
||
to make a symbol table entry for it, and if so, create a new entry
|
||
and return a pointer to it.
|
||
If TYPE is NULL, determine symbol type from the die, otherwise
|
||
used the passed type. */
|
||
|
||
static struct symbol *
|
||
new_symbol (struct die_info *die, struct type *type, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct symbol *sym = NULL;
|
||
char *name;
|
||
struct attribute *attr = NULL;
|
||
struct attribute *attr2 = NULL;
|
||
CORE_ADDR addr = 0;
|
||
|
||
name = dwarf2_linkage_name (die);
|
||
if (name)
|
||
{
|
||
sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack,
|
||
sizeof (struct symbol));
|
||
OBJSTAT (objfile, n_syms++);
|
||
memset (sym, 0, sizeof (struct symbol));
|
||
|
||
/* Cache this symbol's name and the name's demangled form (if any). */
|
||
SYMBOL_LANGUAGE (sym) = cu_language;
|
||
SYMBOL_SET_NAMES (sym, name, strlen (name), objfile);
|
||
|
||
/* Default assumptions.
|
||
Use the passed type or decode it from the die. */
|
||
SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
|
||
SYMBOL_CLASS (sym) = LOC_STATIC;
|
||
if (type != NULL)
|
||
SYMBOL_TYPE (sym) = type;
|
||
else
|
||
SYMBOL_TYPE (sym) = die_type (die, objfile, cu_header);
|
||
attr = dwarf_attr (die, DW_AT_decl_line);
|
||
if (attr)
|
||
{
|
||
SYMBOL_LINE (sym) = DW_UNSND (attr);
|
||
}
|
||
switch (die->tag)
|
||
{
|
||
case DW_TAG_label:
|
||
attr = dwarf_attr (die, DW_AT_low_pc);
|
||
if (attr)
|
||
{
|
||
SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
|
||
}
|
||
SYMBOL_CLASS (sym) = LOC_LABEL;
|
||
break;
|
||
case DW_TAG_subprogram:
|
||
/* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
|
||
finish_block. */
|
||
SYMBOL_CLASS (sym) = LOC_BLOCK;
|
||
attr2 = dwarf_attr (die, DW_AT_external);
|
||
if (attr2 && (DW_UNSND (attr2) != 0))
|
||
{
|
||
add_symbol_to_list (sym, &global_symbols);
|
||
}
|
||
else
|
||
{
|
||
add_symbol_to_list (sym, list_in_scope);
|
||
}
|
||
break;
|
||
case DW_TAG_variable:
|
||
/* Compilation with minimal debug info may result in variables
|
||
with missing type entries. Change the misleading `void' type
|
||
to something sensible. */
|
||
if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
|
||
SYMBOL_TYPE (sym) = init_type (TYPE_CODE_INT,
|
||
TARGET_INT_BIT / HOST_CHAR_BIT, 0,
|
||
"<variable, no debug info>",
|
||
objfile);
|
||
attr = dwarf_attr (die, DW_AT_const_value);
|
||
if (attr)
|
||
{
|
||
dwarf2_const_value (attr, sym, objfile, cu_header);
|
||
attr2 = dwarf_attr (die, DW_AT_external);
|
||
if (attr2 && (DW_UNSND (attr2) != 0))
|
||
add_symbol_to_list (sym, &global_symbols);
|
||
else
|
||
add_symbol_to_list (sym, list_in_scope);
|
||
break;
|
||
}
|
||
attr = dwarf_attr (die, DW_AT_location);
|
||
if (attr)
|
||
{
|
||
var_decode_location (attr, sym, objfile, cu_header);
|
||
attr2 = dwarf_attr (die, DW_AT_external);
|
||
if (attr2 && (DW_UNSND (attr2) != 0))
|
||
add_symbol_to_list (sym, &global_symbols);
|
||
else
|
||
add_symbol_to_list (sym, list_in_scope);
|
||
}
|
||
else
|
||
{
|
||
/* We do not know the address of this symbol.
|
||
If it is an external symbol and we have type information
|
||
for it, enter the symbol as a LOC_UNRESOLVED symbol.
|
||
The address of the variable will then be determined from
|
||
the minimal symbol table whenever the variable is
|
||
referenced. */
|
||
attr2 = dwarf_attr (die, DW_AT_external);
|
||
if (attr2 && (DW_UNSND (attr2) != 0)
|
||
&& dwarf_attr (die, DW_AT_type) != NULL)
|
||
{
|
||
SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
|
||
add_symbol_to_list (sym, &global_symbols);
|
||
}
|
||
}
|
||
break;
|
||
case DW_TAG_formal_parameter:
|
||
attr = dwarf_attr (die, DW_AT_location);
|
||
if (attr)
|
||
{
|
||
SYMBOL_VALUE (sym) =
|
||
decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
|
||
if (isreg)
|
||
{
|
||
SYMBOL_CLASS (sym) = LOC_REGPARM;
|
||
SYMBOL_VALUE (sym) =
|
||
DWARF2_REG_TO_REGNUM (SYMBOL_VALUE (sym));
|
||
}
|
||
else if (offreg)
|
||
{
|
||
if (isderef)
|
||
{
|
||
if (basereg != frame_base_reg)
|
||
dwarf2_complex_location_expr_complaint ();
|
||
SYMBOL_CLASS (sym) = LOC_REF_ARG;
|
||
}
|
||
else
|
||
{
|
||
SYMBOL_CLASS (sym) = LOC_BASEREG_ARG;
|
||
SYMBOL_BASEREG (sym) = DWARF2_REG_TO_REGNUM (basereg);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
SYMBOL_CLASS (sym) = LOC_ARG;
|
||
}
|
||
}
|
||
attr = dwarf_attr (die, DW_AT_const_value);
|
||
if (attr)
|
||
{
|
||
dwarf2_const_value (attr, sym, objfile, cu_header);
|
||
}
|
||
add_symbol_to_list (sym, list_in_scope);
|
||
break;
|
||
case DW_TAG_unspecified_parameters:
|
||
/* From varargs functions; gdb doesn't seem to have any
|
||
interest in this information, so just ignore it for now.
|
||
(FIXME?) */
|
||
break;
|
||
case DW_TAG_class_type:
|
||
case DW_TAG_structure_type:
|
||
case DW_TAG_union_type:
|
||
case DW_TAG_enumeration_type:
|
||
SYMBOL_CLASS (sym) = LOC_TYPEDEF;
|
||
SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
|
||
add_symbol_to_list (sym, list_in_scope);
|
||
|
||
/* The semantics of C++ state that "struct foo { ... }" also
|
||
defines a typedef for "foo". Synthesize a typedef symbol so
|
||
that "ptype foo" works as expected. */
|
||
if (cu_language == language_cplus)
|
||
{
|
||
struct symbol *typedef_sym = (struct symbol *)
|
||
obstack_alloc (&objfile->symbol_obstack,
|
||
sizeof (struct symbol));
|
||
*typedef_sym = *sym;
|
||
SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
|
||
if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
|
||
TYPE_NAME (SYMBOL_TYPE (sym)) =
|
||
obsavestring (DEPRECATED_SYMBOL_NAME (sym),
|
||
strlen (DEPRECATED_SYMBOL_NAME (sym)),
|
||
&objfile->type_obstack);
|
||
add_symbol_to_list (typedef_sym, list_in_scope);
|
||
}
|
||
break;
|
||
case DW_TAG_typedef:
|
||
case DW_TAG_base_type:
|
||
SYMBOL_CLASS (sym) = LOC_TYPEDEF;
|
||
SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
|
||
add_symbol_to_list (sym, list_in_scope);
|
||
break;
|
||
case DW_TAG_enumerator:
|
||
attr = dwarf_attr (die, DW_AT_const_value);
|
||
if (attr)
|
||
{
|
||
dwarf2_const_value (attr, sym, objfile, cu_header);
|
||
}
|
||
add_symbol_to_list (sym, list_in_scope);
|
||
break;
|
||
default:
|
||
/* Not a tag we recognize. Hopefully we aren't processing
|
||
trash data, but since we must specifically ignore things
|
||
we don't recognize, there is nothing else we should do at
|
||
this point. */
|
||
complaint (&symfile_complaints, "unsupported tag: '%s'",
|
||
dwarf_tag_name (die->tag));
|
||
break;
|
||
}
|
||
}
|
||
return (sym);
|
||
}
|
||
|
||
/* Copy constant value from an attribute to a symbol. */
|
||
|
||
static void
|
||
dwarf2_const_value (struct attribute *attr, struct symbol *sym,
|
||
struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct dwarf_block *blk;
|
||
|
||
switch (attr->form)
|
||
{
|
||
case DW_FORM_addr:
|
||
if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
|
||
dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym),
|
||
cu_header->addr_size,
|
||
TYPE_LENGTH (SYMBOL_TYPE
|
||
(sym)));
|
||
SYMBOL_VALUE_BYTES (sym) = (char *)
|
||
obstack_alloc (&objfile->symbol_obstack, cu_header->addr_size);
|
||
/* NOTE: cagney/2003-05-09: In-lined store_address call with
|
||
it's body - store_unsigned_integer. */
|
||
store_unsigned_integer (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size,
|
||
DW_ADDR (attr));
|
||
SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
|
||
break;
|
||
case DW_FORM_block1:
|
||
case DW_FORM_block2:
|
||
case DW_FORM_block4:
|
||
case DW_FORM_block:
|
||
blk = DW_BLOCK (attr);
|
||
if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
|
||
dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym),
|
||
blk->size,
|
||
TYPE_LENGTH (SYMBOL_TYPE
|
||
(sym)));
|
||
SYMBOL_VALUE_BYTES (sym) = (char *)
|
||
obstack_alloc (&objfile->symbol_obstack, blk->size);
|
||
memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
|
||
SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
|
||
break;
|
||
|
||
/* The DW_AT_const_value attributes are supposed to carry the
|
||
symbol's value "represented as it would be on the target
|
||
architecture." By the time we get here, it's already been
|
||
converted to host endianness, so we just need to sign- or
|
||
zero-extend it as appropriate. */
|
||
case DW_FORM_data1:
|
||
dwarf2_const_value_data (attr, sym, 8);
|
||
break;
|
||
case DW_FORM_data2:
|
||
dwarf2_const_value_data (attr, sym, 16);
|
||
break;
|
||
case DW_FORM_data4:
|
||
dwarf2_const_value_data (attr, sym, 32);
|
||
break;
|
||
case DW_FORM_data8:
|
||
dwarf2_const_value_data (attr, sym, 64);
|
||
break;
|
||
|
||
case DW_FORM_sdata:
|
||
SYMBOL_VALUE (sym) = DW_SND (attr);
|
||
SYMBOL_CLASS (sym) = LOC_CONST;
|
||
break;
|
||
|
||
case DW_FORM_udata:
|
||
SYMBOL_VALUE (sym) = DW_UNSND (attr);
|
||
SYMBOL_CLASS (sym) = LOC_CONST;
|
||
break;
|
||
|
||
default:
|
||
complaint (&symfile_complaints,
|
||
"unsupported const value attribute form: '%s'",
|
||
dwarf_form_name (attr->form));
|
||
SYMBOL_VALUE (sym) = 0;
|
||
SYMBOL_CLASS (sym) = LOC_CONST;
|
||
break;
|
||
}
|
||
}
|
||
|
||
|
||
/* Given an attr with a DW_FORM_dataN value in host byte order, sign-
|
||
or zero-extend it as appropriate for the symbol's type. */
|
||
static void
|
||
dwarf2_const_value_data (struct attribute *attr,
|
||
struct symbol *sym,
|
||
int bits)
|
||
{
|
||
LONGEST l = DW_UNSND (attr);
|
||
|
||
if (bits < sizeof (l) * 8)
|
||
{
|
||
if (TYPE_UNSIGNED (SYMBOL_TYPE (sym)))
|
||
l &= ((LONGEST) 1 << bits) - 1;
|
||
else
|
||
l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits);
|
||
}
|
||
|
||
SYMBOL_VALUE (sym) = l;
|
||
SYMBOL_CLASS (sym) = LOC_CONST;
|
||
}
|
||
|
||
|
||
/* Return the type of the die in question using its DW_AT_type attribute. */
|
||
|
||
static struct type *
|
||
die_type (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct type *type;
|
||
struct attribute *type_attr;
|
||
struct die_info *type_die;
|
||
unsigned int ref;
|
||
|
||
type_attr = dwarf_attr (die, DW_AT_type);
|
||
if (!type_attr)
|
||
{
|
||
/* A missing DW_AT_type represents a void type. */
|
||
return dwarf2_fundamental_type (objfile, FT_VOID);
|
||
}
|
||
else
|
||
{
|
||
ref = dwarf2_get_ref_die_offset (type_attr);
|
||
type_die = follow_die_ref (ref);
|
||
if (!type_die)
|
||
{
|
||
error ("Dwarf Error: Cannot find referent at offset %d [in module %s]",
|
||
ref, objfile->name);
|
||
return NULL;
|
||
}
|
||
}
|
||
type = tag_type_to_type (type_die, objfile, cu_header);
|
||
if (!type)
|
||
{
|
||
dump_die (type_die);
|
||
error ("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]",
|
||
objfile->name);
|
||
}
|
||
return type;
|
||
}
|
||
|
||
/* Return the containing type of the die in question using its
|
||
DW_AT_containing_type attribute. */
|
||
|
||
static struct type *
|
||
die_containing_type (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
struct type *type = NULL;
|
||
struct attribute *type_attr;
|
||
struct die_info *type_die = NULL;
|
||
unsigned int ref;
|
||
|
||
type_attr = dwarf_attr (die, DW_AT_containing_type);
|
||
if (type_attr)
|
||
{
|
||
ref = dwarf2_get_ref_die_offset (type_attr);
|
||
type_die = follow_die_ref (ref);
|
||
if (!type_die)
|
||
{
|
||
error ("Dwarf Error: Cannot find referent at offset %d [in module %s]", ref,
|
||
objfile->name);
|
||
return NULL;
|
||
}
|
||
type = tag_type_to_type (type_die, objfile, cu_header);
|
||
}
|
||
if (!type)
|
||
{
|
||
if (type_die)
|
||
dump_die (type_die);
|
||
error ("Dwarf Error: Problem turning containing type into gdb type [in module %s]",
|
||
objfile->name);
|
||
}
|
||
return type;
|
||
}
|
||
|
||
#if 0
|
||
static struct type *
|
||
type_at_offset (unsigned int offset, struct objfile *objfile)
|
||
{
|
||
struct die_info *die;
|
||
struct type *type;
|
||
|
||
die = follow_die_ref (offset);
|
||
if (!die)
|
||
{
|
||
error ("Dwarf Error: Cannot find type referent at offset %d.", offset);
|
||
return NULL;
|
||
}
|
||
type = tag_type_to_type (die, objfile);
|
||
return type;
|
||
}
|
||
#endif
|
||
|
||
static struct type *
|
||
tag_type_to_type (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
if (die->type)
|
||
{
|
||
return die->type;
|
||
}
|
||
else
|
||
{
|
||
read_type_die (die, objfile, cu_header);
|
||
if (!die->type)
|
||
{
|
||
dump_die (die);
|
||
error ("Dwarf Error: Cannot find type of die [in module %s]",
|
||
objfile->name);
|
||
}
|
||
return die->type;
|
||
}
|
||
}
|
||
|
||
static void
|
||
read_type_die (struct die_info *die, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
switch (die->tag)
|
||
{
|
||
case DW_TAG_class_type:
|
||
case DW_TAG_structure_type:
|
||
case DW_TAG_union_type:
|
||
read_structure_scope (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_enumeration_type:
|
||
read_enumeration (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_subprogram:
|
||
case DW_TAG_subroutine_type:
|
||
read_subroutine_type (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_array_type:
|
||
read_array_type (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_pointer_type:
|
||
read_tag_pointer_type (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_ptr_to_member_type:
|
||
read_tag_ptr_to_member_type (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_reference_type:
|
||
read_tag_reference_type (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_const_type:
|
||
read_tag_const_type (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_volatile_type:
|
||
read_tag_volatile_type (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_string_type:
|
||
read_tag_string_type (die, objfile);
|
||
break;
|
||
case DW_TAG_typedef:
|
||
read_typedef (die, objfile, cu_header);
|
||
break;
|
||
case DW_TAG_base_type:
|
||
read_base_type (die, objfile);
|
||
break;
|
||
default:
|
||
complaint (&symfile_complaints, "unexepected tag in read_type_die: '%s'",
|
||
dwarf_tag_name (die->tag));
|
||
break;
|
||
}
|
||
}
|
||
|
||
static struct type *
|
||
dwarf_base_type (int encoding, int size, struct objfile *objfile)
|
||
{
|
||
/* FIXME - this should not produce a new (struct type *)
|
||
every time. It should cache base types. */
|
||
struct type *type;
|
||
switch (encoding)
|
||
{
|
||
case DW_ATE_address:
|
||
type = dwarf2_fundamental_type (objfile, FT_VOID);
|
||
return type;
|
||
case DW_ATE_boolean:
|
||
type = dwarf2_fundamental_type (objfile, FT_BOOLEAN);
|
||
return type;
|
||
case DW_ATE_complex_float:
|
||
if (size == 16)
|
||
{
|
||
type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_COMPLEX);
|
||
}
|
||
else
|
||
{
|
||
type = dwarf2_fundamental_type (objfile, FT_COMPLEX);
|
||
}
|
||
return type;
|
||
case DW_ATE_float:
|
||
if (size == 8)
|
||
{
|
||
type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT);
|
||
}
|
||
else
|
||
{
|
||
type = dwarf2_fundamental_type (objfile, FT_FLOAT);
|
||
}
|
||
return type;
|
||
case DW_ATE_signed:
|
||
switch (size)
|
||
{
|
||
case 1:
|
||
type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR);
|
||
break;
|
||
case 2:
|
||
type = dwarf2_fundamental_type (objfile, FT_SIGNED_SHORT);
|
||
break;
|
||
default:
|
||
case 4:
|
||
type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER);
|
||
break;
|
||
}
|
||
return type;
|
||
case DW_ATE_signed_char:
|
||
type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR);
|
||
return type;
|
||
case DW_ATE_unsigned:
|
||
switch (size)
|
||
{
|
||
case 1:
|
||
type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR);
|
||
break;
|
||
case 2:
|
||
type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_SHORT);
|
||
break;
|
||
default:
|
||
case 4:
|
||
type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_INTEGER);
|
||
break;
|
||
}
|
||
return type;
|
||
case DW_ATE_unsigned_char:
|
||
type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR);
|
||
return type;
|
||
default:
|
||
type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER);
|
||
return type;
|
||
}
|
||
}
|
||
|
||
#if 0
|
||
struct die_info *
|
||
copy_die (struct die_info *old_die)
|
||
{
|
||
struct die_info *new_die;
|
||
int i, num_attrs;
|
||
|
||
new_die = (struct die_info *) xmalloc (sizeof (struct die_info));
|
||
memset (new_die, 0, sizeof (struct die_info));
|
||
|
||
new_die->tag = old_die->tag;
|
||
new_die->has_children = old_die->has_children;
|
||
new_die->abbrev = old_die->abbrev;
|
||
new_die->offset = old_die->offset;
|
||
new_die->type = NULL;
|
||
|
||
num_attrs = old_die->num_attrs;
|
||
new_die->num_attrs = num_attrs;
|
||
new_die->attrs = (struct attribute *)
|
||
xmalloc (num_attrs * sizeof (struct attribute));
|
||
|
||
for (i = 0; i < old_die->num_attrs; ++i)
|
||
{
|
||
new_die->attrs[i].name = old_die->attrs[i].name;
|
||
new_die->attrs[i].form = old_die->attrs[i].form;
|
||
new_die->attrs[i].u.addr = old_die->attrs[i].u.addr;
|
||
}
|
||
|
||
new_die->next = NULL;
|
||
return new_die;
|
||
}
|
||
#endif
|
||
|
||
/* Return sibling of die, NULL if no sibling. */
|
||
|
||
static struct die_info *
|
||
sibling_die (struct die_info *die)
|
||
{
|
||
int nesting_level = 0;
|
||
|
||
if (!die->has_children)
|
||
{
|
||
if (die->next && (die->next->tag == 0))
|
||
{
|
||
return NULL;
|
||
}
|
||
else
|
||
{
|
||
return die->next;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
do
|
||
{
|
||
if (die->has_children)
|
||
{
|
||
nesting_level++;
|
||
}
|
||
if (die->tag == 0)
|
||
{
|
||
nesting_level--;
|
||
}
|
||
die = die->next;
|
||
}
|
||
while (nesting_level);
|
||
if (die && (die->tag == 0))
|
||
{
|
||
return NULL;
|
||
}
|
||
else
|
||
{
|
||
return die;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Get linkage name of a die, return NULL if not found. */
|
||
|
||
static char *
|
||
dwarf2_linkage_name (struct die_info *die)
|
||
{
|
||
struct attribute *attr;
|
||
|
||
attr = dwarf_attr (die, DW_AT_MIPS_linkage_name);
|
||
if (attr && DW_STRING (attr))
|
||
return DW_STRING (attr);
|
||
attr = dwarf_attr (die, DW_AT_name);
|
||
if (attr && DW_STRING (attr))
|
||
return DW_STRING (attr);
|
||
return NULL;
|
||
}
|
||
|
||
/* Get name of a die, return NULL if not found. */
|
||
|
||
static char *
|
||
dwarf2_name (struct die_info *die)
|
||
{
|
||
struct attribute *attr;
|
||
|
||
attr = dwarf_attr (die, DW_AT_name);
|
||
if (attr && DW_STRING (attr))
|
||
return DW_STRING (attr);
|
||
return NULL;
|
||
}
|
||
|
||
/* Return the die that this die in an extension of, or NULL if there
|
||
is none. */
|
||
|
||
static struct die_info *
|
||
dwarf2_extension (struct die_info *die)
|
||
{
|
||
struct attribute *attr;
|
||
struct die_info *extension_die;
|
||
unsigned int ref;
|
||
|
||
attr = dwarf_attr (die, DW_AT_extension);
|
||
if (attr == NULL)
|
||
return NULL;
|
||
|
||
ref = dwarf2_get_ref_die_offset (attr);
|
||
extension_die = follow_die_ref (ref);
|
||
if (!extension_die)
|
||
{
|
||
error ("Dwarf Error: Cannot find referent at offset %d.", ref);
|
||
}
|
||
|
||
return extension_die;
|
||
}
|
||
|
||
/* Convert a DIE tag into its string name. */
|
||
|
||
static char *
|
||
dwarf_tag_name (register unsigned tag)
|
||
{
|
||
switch (tag)
|
||
{
|
||
case DW_TAG_padding:
|
||
return "DW_TAG_padding";
|
||
case DW_TAG_array_type:
|
||
return "DW_TAG_array_type";
|
||
case DW_TAG_class_type:
|
||
return "DW_TAG_class_type";
|
||
case DW_TAG_entry_point:
|
||
return "DW_TAG_entry_point";
|
||
case DW_TAG_enumeration_type:
|
||
return "DW_TAG_enumeration_type";
|
||
case DW_TAG_formal_parameter:
|
||
return "DW_TAG_formal_parameter";
|
||
case DW_TAG_imported_declaration:
|
||
return "DW_TAG_imported_declaration";
|
||
case DW_TAG_label:
|
||
return "DW_TAG_label";
|
||
case DW_TAG_lexical_block:
|
||
return "DW_TAG_lexical_block";
|
||
case DW_TAG_member:
|
||
return "DW_TAG_member";
|
||
case DW_TAG_pointer_type:
|
||
return "DW_TAG_pointer_type";
|
||
case DW_TAG_reference_type:
|
||
return "DW_TAG_reference_type";
|
||
case DW_TAG_compile_unit:
|
||
return "DW_TAG_compile_unit";
|
||
case DW_TAG_string_type:
|
||
return "DW_TAG_string_type";
|
||
case DW_TAG_structure_type:
|
||
return "DW_TAG_structure_type";
|
||
case DW_TAG_subroutine_type:
|
||
return "DW_TAG_subroutine_type";
|
||
case DW_TAG_typedef:
|
||
return "DW_TAG_typedef";
|
||
case DW_TAG_union_type:
|
||
return "DW_TAG_union_type";
|
||
case DW_TAG_unspecified_parameters:
|
||
return "DW_TAG_unspecified_parameters";
|
||
case DW_TAG_variant:
|
||
return "DW_TAG_variant";
|
||
case DW_TAG_common_block:
|
||
return "DW_TAG_common_block";
|
||
case DW_TAG_common_inclusion:
|
||
return "DW_TAG_common_inclusion";
|
||
case DW_TAG_inheritance:
|
||
return "DW_TAG_inheritance";
|
||
case DW_TAG_inlined_subroutine:
|
||
return "DW_TAG_inlined_subroutine";
|
||
case DW_TAG_module:
|
||
return "DW_TAG_module";
|
||
case DW_TAG_ptr_to_member_type:
|
||
return "DW_TAG_ptr_to_member_type";
|
||
case DW_TAG_set_type:
|
||
return "DW_TAG_set_type";
|
||
case DW_TAG_subrange_type:
|
||
return "DW_TAG_subrange_type";
|
||
case DW_TAG_with_stmt:
|
||
return "DW_TAG_with_stmt";
|
||
case DW_TAG_access_declaration:
|
||
return "DW_TAG_access_declaration";
|
||
case DW_TAG_base_type:
|
||
return "DW_TAG_base_type";
|
||
case DW_TAG_catch_block:
|
||
return "DW_TAG_catch_block";
|
||
case DW_TAG_const_type:
|
||
return "DW_TAG_const_type";
|
||
case DW_TAG_constant:
|
||
return "DW_TAG_constant";
|
||
case DW_TAG_enumerator:
|
||
return "DW_TAG_enumerator";
|
||
case DW_TAG_file_type:
|
||
return "DW_TAG_file_type";
|
||
case DW_TAG_friend:
|
||
return "DW_TAG_friend";
|
||
case DW_TAG_namelist:
|
||
return "DW_TAG_namelist";
|
||
case DW_TAG_namelist_item:
|
||
return "DW_TAG_namelist_item";
|
||
case DW_TAG_packed_type:
|
||
return "DW_TAG_packed_type";
|
||
case DW_TAG_subprogram:
|
||
return "DW_TAG_subprogram";
|
||
case DW_TAG_template_type_param:
|
||
return "DW_TAG_template_type_param";
|
||
case DW_TAG_template_value_param:
|
||
return "DW_TAG_template_value_param";
|
||
case DW_TAG_thrown_type:
|
||
return "DW_TAG_thrown_type";
|
||
case DW_TAG_try_block:
|
||
return "DW_TAG_try_block";
|
||
case DW_TAG_variant_part:
|
||
return "DW_TAG_variant_part";
|
||
case DW_TAG_variable:
|
||
return "DW_TAG_variable";
|
||
case DW_TAG_volatile_type:
|
||
return "DW_TAG_volatile_type";
|
||
case DW_TAG_dwarf_procedure:
|
||
return "DW_TAG_dwarf_procedure";
|
||
case DW_TAG_restrict_type:
|
||
return "DW_TAG_restrict_type";
|
||
case DW_TAG_interface_type:
|
||
return "DW_TAG_interface_type";
|
||
case DW_TAG_namespace:
|
||
return "DW_TAG_namespace";
|
||
case DW_TAG_imported_module:
|
||
return "DW_TAG_imported_module";
|
||
case DW_TAG_unspecified_type:
|
||
return "DW_TAG_unspecified_type";
|
||
case DW_TAG_partial_unit:
|
||
return "DW_TAG_partial_unit";
|
||
case DW_TAG_imported_unit:
|
||
return "DW_TAG_imported_unit";
|
||
case DW_TAG_MIPS_loop:
|
||
return "DW_TAG_MIPS_loop";
|
||
case DW_TAG_format_label:
|
||
return "DW_TAG_format_label";
|
||
case DW_TAG_function_template:
|
||
return "DW_TAG_function_template";
|
||
case DW_TAG_class_template:
|
||
return "DW_TAG_class_template";
|
||
default:
|
||
return "DW_TAG_<unknown>";
|
||
}
|
||
}
|
||
|
||
/* Convert a DWARF attribute code into its string name. */
|
||
|
||
static char *
|
||
dwarf_attr_name (register unsigned attr)
|
||
{
|
||
switch (attr)
|
||
{
|
||
case DW_AT_sibling:
|
||
return "DW_AT_sibling";
|
||
case DW_AT_location:
|
||
return "DW_AT_location";
|
||
case DW_AT_name:
|
||
return "DW_AT_name";
|
||
case DW_AT_ordering:
|
||
return "DW_AT_ordering";
|
||
case DW_AT_subscr_data:
|
||
return "DW_AT_subscr_data";
|
||
case DW_AT_byte_size:
|
||
return "DW_AT_byte_size";
|
||
case DW_AT_bit_offset:
|
||
return "DW_AT_bit_offset";
|
||
case DW_AT_bit_size:
|
||
return "DW_AT_bit_size";
|
||
case DW_AT_element_list:
|
||
return "DW_AT_element_list";
|
||
case DW_AT_stmt_list:
|
||
return "DW_AT_stmt_list";
|
||
case DW_AT_low_pc:
|
||
return "DW_AT_low_pc";
|
||
case DW_AT_high_pc:
|
||
return "DW_AT_high_pc";
|
||
case DW_AT_language:
|
||
return "DW_AT_language";
|
||
case DW_AT_member:
|
||
return "DW_AT_member";
|
||
case DW_AT_discr:
|
||
return "DW_AT_discr";
|
||
case DW_AT_discr_value:
|
||
return "DW_AT_discr_value";
|
||
case DW_AT_visibility:
|
||
return "DW_AT_visibility";
|
||
case DW_AT_import:
|
||
return "DW_AT_import";
|
||
case DW_AT_string_length:
|
||
return "DW_AT_string_length";
|
||
case DW_AT_common_reference:
|
||
return "DW_AT_common_reference";
|
||
case DW_AT_comp_dir:
|
||
return "DW_AT_comp_dir";
|
||
case DW_AT_const_value:
|
||
return "DW_AT_const_value";
|
||
case DW_AT_containing_type:
|
||
return "DW_AT_containing_type";
|
||
case DW_AT_default_value:
|
||
return "DW_AT_default_value";
|
||
case DW_AT_inline:
|
||
return "DW_AT_inline";
|
||
case DW_AT_is_optional:
|
||
return "DW_AT_is_optional";
|
||
case DW_AT_lower_bound:
|
||
return "DW_AT_lower_bound";
|
||
case DW_AT_producer:
|
||
return "DW_AT_producer";
|
||
case DW_AT_prototyped:
|
||
return "DW_AT_prototyped";
|
||
case DW_AT_return_addr:
|
||
return "DW_AT_return_addr";
|
||
case DW_AT_start_scope:
|
||
return "DW_AT_start_scope";
|
||
case DW_AT_stride_size:
|
||
return "DW_AT_stride_size";
|
||
case DW_AT_upper_bound:
|
||
return "DW_AT_upper_bound";
|
||
case DW_AT_abstract_origin:
|
||
return "DW_AT_abstract_origin";
|
||
case DW_AT_accessibility:
|
||
return "DW_AT_accessibility";
|
||
case DW_AT_address_class:
|
||
return "DW_AT_address_class";
|
||
case DW_AT_artificial:
|
||
return "DW_AT_artificial";
|
||
case DW_AT_base_types:
|
||
return "DW_AT_base_types";
|
||
case DW_AT_calling_convention:
|
||
return "DW_AT_calling_convention";
|
||
case DW_AT_count:
|
||
return "DW_AT_count";
|
||
case DW_AT_data_member_location:
|
||
return "DW_AT_data_member_location";
|
||
case DW_AT_decl_column:
|
||
return "DW_AT_decl_column";
|
||
case DW_AT_decl_file:
|
||
return "DW_AT_decl_file";
|
||
case DW_AT_decl_line:
|
||
return "DW_AT_decl_line";
|
||
case DW_AT_declaration:
|
||
return "DW_AT_declaration";
|
||
case DW_AT_discr_list:
|
||
return "DW_AT_discr_list";
|
||
case DW_AT_encoding:
|
||
return "DW_AT_encoding";
|
||
case DW_AT_external:
|
||
return "DW_AT_external";
|
||
case DW_AT_frame_base:
|
||
return "DW_AT_frame_base";
|
||
case DW_AT_friend:
|
||
return "DW_AT_friend";
|
||
case DW_AT_identifier_case:
|
||
return "DW_AT_identifier_case";
|
||
case DW_AT_macro_info:
|
||
return "DW_AT_macro_info";
|
||
case DW_AT_namelist_items:
|
||
return "DW_AT_namelist_items";
|
||
case DW_AT_priority:
|
||
return "DW_AT_priority";
|
||
case DW_AT_segment:
|
||
return "DW_AT_segment";
|
||
case DW_AT_specification:
|
||
return "DW_AT_specification";
|
||
case DW_AT_static_link:
|
||
return "DW_AT_static_link";
|
||
case DW_AT_type:
|
||
return "DW_AT_type";
|
||
case DW_AT_use_location:
|
||
return "DW_AT_use_location";
|
||
case DW_AT_variable_parameter:
|
||
return "DW_AT_variable_parameter";
|
||
case DW_AT_virtuality:
|
||
return "DW_AT_virtuality";
|
||
case DW_AT_vtable_elem_location:
|
||
return "DW_AT_vtable_elem_location";
|
||
case DW_AT_allocated:
|
||
return "DW_AT_allocated";
|
||
case DW_AT_associated:
|
||
return "DW_AT_associated";
|
||
case DW_AT_data_location:
|
||
return "DW_AT_data_location";
|
||
case DW_AT_stride:
|
||
return "DW_AT_stride";
|
||
case DW_AT_entry_pc:
|
||
return "DW_AT_entry_pc";
|
||
case DW_AT_use_UTF8:
|
||
return "DW_AT_use_UTF8";
|
||
case DW_AT_extension:
|
||
return "DW_AT_extension";
|
||
case DW_AT_ranges:
|
||
return "DW_AT_ranges";
|
||
case DW_AT_trampoline:
|
||
return "DW_AT_trampoline";
|
||
case DW_AT_call_column:
|
||
return "DW_AT_call_column";
|
||
case DW_AT_call_file:
|
||
return "DW_AT_call_file";
|
||
case DW_AT_call_line:
|
||
return "DW_AT_call_line";
|
||
#ifdef MIPS
|
||
case DW_AT_MIPS_fde:
|
||
return "DW_AT_MIPS_fde";
|
||
case DW_AT_MIPS_loop_begin:
|
||
return "DW_AT_MIPS_loop_begin";
|
||
case DW_AT_MIPS_tail_loop_begin:
|
||
return "DW_AT_MIPS_tail_loop_begin";
|
||
case DW_AT_MIPS_epilog_begin:
|
||
return "DW_AT_MIPS_epilog_begin";
|
||
case DW_AT_MIPS_loop_unroll_factor:
|
||
return "DW_AT_MIPS_loop_unroll_factor";
|
||
case DW_AT_MIPS_software_pipeline_depth:
|
||
return "DW_AT_MIPS_software_pipeline_depth";
|
||
case DW_AT_MIPS_linkage_name:
|
||
return "DW_AT_MIPS_linkage_name";
|
||
#endif
|
||
|
||
case DW_AT_sf_names:
|
||
return "DW_AT_sf_names";
|
||
case DW_AT_src_info:
|
||
return "DW_AT_src_info";
|
||
case DW_AT_mac_info:
|
||
return "DW_AT_mac_info";
|
||
case DW_AT_src_coords:
|
||
return "DW_AT_src_coords";
|
||
case DW_AT_body_begin:
|
||
return "DW_AT_body_begin";
|
||
case DW_AT_body_end:
|
||
return "DW_AT_body_end";
|
||
case DW_AT_GNU_vector:
|
||
return "DW_AT_GNU_vector";
|
||
default:
|
||
return "DW_AT_<unknown>";
|
||
}
|
||
}
|
||
|
||
/* Convert a DWARF value form code into its string name. */
|
||
|
||
static char *
|
||
dwarf_form_name (register unsigned form)
|
||
{
|
||
switch (form)
|
||
{
|
||
case DW_FORM_addr:
|
||
return "DW_FORM_addr";
|
||
case DW_FORM_block2:
|
||
return "DW_FORM_block2";
|
||
case DW_FORM_block4:
|
||
return "DW_FORM_block4";
|
||
case DW_FORM_data2:
|
||
return "DW_FORM_data2";
|
||
case DW_FORM_data4:
|
||
return "DW_FORM_data4";
|
||
case DW_FORM_data8:
|
||
return "DW_FORM_data8";
|
||
case DW_FORM_string:
|
||
return "DW_FORM_string";
|
||
case DW_FORM_block:
|
||
return "DW_FORM_block";
|
||
case DW_FORM_block1:
|
||
return "DW_FORM_block1";
|
||
case DW_FORM_data1:
|
||
return "DW_FORM_data1";
|
||
case DW_FORM_flag:
|
||
return "DW_FORM_flag";
|
||
case DW_FORM_sdata:
|
||
return "DW_FORM_sdata";
|
||
case DW_FORM_strp:
|
||
return "DW_FORM_strp";
|
||
case DW_FORM_udata:
|
||
return "DW_FORM_udata";
|
||
case DW_FORM_ref_addr:
|
||
return "DW_FORM_ref_addr";
|
||
case DW_FORM_ref1:
|
||
return "DW_FORM_ref1";
|
||
case DW_FORM_ref2:
|
||
return "DW_FORM_ref2";
|
||
case DW_FORM_ref4:
|
||
return "DW_FORM_ref4";
|
||
case DW_FORM_ref8:
|
||
return "DW_FORM_ref8";
|
||
case DW_FORM_ref_udata:
|
||
return "DW_FORM_ref_udata";
|
||
case DW_FORM_indirect:
|
||
return "DW_FORM_indirect";
|
||
default:
|
||
return "DW_FORM_<unknown>";
|
||
}
|
||
}
|
||
|
||
/* Convert a DWARF stack opcode into its string name. */
|
||
|
||
static char *
|
||
dwarf_stack_op_name (register unsigned op)
|
||
{
|
||
switch (op)
|
||
{
|
||
case DW_OP_addr:
|
||
return "DW_OP_addr";
|
||
case DW_OP_deref:
|
||
return "DW_OP_deref";
|
||
case DW_OP_const1u:
|
||
return "DW_OP_const1u";
|
||
case DW_OP_const1s:
|
||
return "DW_OP_const1s";
|
||
case DW_OP_const2u:
|
||
return "DW_OP_const2u";
|
||
case DW_OP_const2s:
|
||
return "DW_OP_const2s";
|
||
case DW_OP_const4u:
|
||
return "DW_OP_const4u";
|
||
case DW_OP_const4s:
|
||
return "DW_OP_const4s";
|
||
case DW_OP_const8u:
|
||
return "DW_OP_const8u";
|
||
case DW_OP_const8s:
|
||
return "DW_OP_const8s";
|
||
case DW_OP_constu:
|
||
return "DW_OP_constu";
|
||
case DW_OP_consts:
|
||
return "DW_OP_consts";
|
||
case DW_OP_dup:
|
||
return "DW_OP_dup";
|
||
case DW_OP_drop:
|
||
return "DW_OP_drop";
|
||
case DW_OP_over:
|
||
return "DW_OP_over";
|
||
case DW_OP_pick:
|
||
return "DW_OP_pick";
|
||
case DW_OP_swap:
|
||
return "DW_OP_swap";
|
||
case DW_OP_rot:
|
||
return "DW_OP_rot";
|
||
case DW_OP_xderef:
|
||
return "DW_OP_xderef";
|
||
case DW_OP_abs:
|
||
return "DW_OP_abs";
|
||
case DW_OP_and:
|
||
return "DW_OP_and";
|
||
case DW_OP_div:
|
||
return "DW_OP_div";
|
||
case DW_OP_minus:
|
||
return "DW_OP_minus";
|
||
case DW_OP_mod:
|
||
return "DW_OP_mod";
|
||
case DW_OP_mul:
|
||
return "DW_OP_mul";
|
||
case DW_OP_neg:
|
||
return "DW_OP_neg";
|
||
case DW_OP_not:
|
||
return "DW_OP_not";
|
||
case DW_OP_or:
|
||
return "DW_OP_or";
|
||
case DW_OP_plus:
|
||
return "DW_OP_plus";
|
||
case DW_OP_plus_uconst:
|
||
return "DW_OP_plus_uconst";
|
||
case DW_OP_shl:
|
||
return "DW_OP_shl";
|
||
case DW_OP_shr:
|
||
return "DW_OP_shr";
|
||
case DW_OP_shra:
|
||
return "DW_OP_shra";
|
||
case DW_OP_xor:
|
||
return "DW_OP_xor";
|
||
case DW_OP_bra:
|
||
return "DW_OP_bra";
|
||
case DW_OP_eq:
|
||
return "DW_OP_eq";
|
||
case DW_OP_ge:
|
||
return "DW_OP_ge";
|
||
case DW_OP_gt:
|
||
return "DW_OP_gt";
|
||
case DW_OP_le:
|
||
return "DW_OP_le";
|
||
case DW_OP_lt:
|
||
return "DW_OP_lt";
|
||
case DW_OP_ne:
|
||
return "DW_OP_ne";
|
||
case DW_OP_skip:
|
||
return "DW_OP_skip";
|
||
case DW_OP_lit0:
|
||
return "DW_OP_lit0";
|
||
case DW_OP_lit1:
|
||
return "DW_OP_lit1";
|
||
case DW_OP_lit2:
|
||
return "DW_OP_lit2";
|
||
case DW_OP_lit3:
|
||
return "DW_OP_lit3";
|
||
case DW_OP_lit4:
|
||
return "DW_OP_lit4";
|
||
case DW_OP_lit5:
|
||
return "DW_OP_lit5";
|
||
case DW_OP_lit6:
|
||
return "DW_OP_lit6";
|
||
case DW_OP_lit7:
|
||
return "DW_OP_lit7";
|
||
case DW_OP_lit8:
|
||
return "DW_OP_lit8";
|
||
case DW_OP_lit9:
|
||
return "DW_OP_lit9";
|
||
case DW_OP_lit10:
|
||
return "DW_OP_lit10";
|
||
case DW_OP_lit11:
|
||
return "DW_OP_lit11";
|
||
case DW_OP_lit12:
|
||
return "DW_OP_lit12";
|
||
case DW_OP_lit13:
|
||
return "DW_OP_lit13";
|
||
case DW_OP_lit14:
|
||
return "DW_OP_lit14";
|
||
case DW_OP_lit15:
|
||
return "DW_OP_lit15";
|
||
case DW_OP_lit16:
|
||
return "DW_OP_lit16";
|
||
case DW_OP_lit17:
|
||
return "DW_OP_lit17";
|
||
case DW_OP_lit18:
|
||
return "DW_OP_lit18";
|
||
case DW_OP_lit19:
|
||
return "DW_OP_lit19";
|
||
case DW_OP_lit20:
|
||
return "DW_OP_lit20";
|
||
case DW_OP_lit21:
|
||
return "DW_OP_lit21";
|
||
case DW_OP_lit22:
|
||
return "DW_OP_lit22";
|
||
case DW_OP_lit23:
|
||
return "DW_OP_lit23";
|
||
case DW_OP_lit24:
|
||
return "DW_OP_lit24";
|
||
case DW_OP_lit25:
|
||
return "DW_OP_lit25";
|
||
case DW_OP_lit26:
|
||
return "DW_OP_lit26";
|
||
case DW_OP_lit27:
|
||
return "DW_OP_lit27";
|
||
case DW_OP_lit28:
|
||
return "DW_OP_lit28";
|
||
case DW_OP_lit29:
|
||
return "DW_OP_lit29";
|
||
case DW_OP_lit30:
|
||
return "DW_OP_lit30";
|
||
case DW_OP_lit31:
|
||
return "DW_OP_lit31";
|
||
case DW_OP_reg0:
|
||
return "DW_OP_reg0";
|
||
case DW_OP_reg1:
|
||
return "DW_OP_reg1";
|
||
case DW_OP_reg2:
|
||
return "DW_OP_reg2";
|
||
case DW_OP_reg3:
|
||
return "DW_OP_reg3";
|
||
case DW_OP_reg4:
|
||
return "DW_OP_reg4";
|
||
case DW_OP_reg5:
|
||
return "DW_OP_reg5";
|
||
case DW_OP_reg6:
|
||
return "DW_OP_reg6";
|
||
case DW_OP_reg7:
|
||
return "DW_OP_reg7";
|
||
case DW_OP_reg8:
|
||
return "DW_OP_reg8";
|
||
case DW_OP_reg9:
|
||
return "DW_OP_reg9";
|
||
case DW_OP_reg10:
|
||
return "DW_OP_reg10";
|
||
case DW_OP_reg11:
|
||
return "DW_OP_reg11";
|
||
case DW_OP_reg12:
|
||
return "DW_OP_reg12";
|
||
case DW_OP_reg13:
|
||
return "DW_OP_reg13";
|
||
case DW_OP_reg14:
|
||
return "DW_OP_reg14";
|
||
case DW_OP_reg15:
|
||
return "DW_OP_reg15";
|
||
case DW_OP_reg16:
|
||
return "DW_OP_reg16";
|
||
case DW_OP_reg17:
|
||
return "DW_OP_reg17";
|
||
case DW_OP_reg18:
|
||
return "DW_OP_reg18";
|
||
case DW_OP_reg19:
|
||
return "DW_OP_reg19";
|
||
case DW_OP_reg20:
|
||
return "DW_OP_reg20";
|
||
case DW_OP_reg21:
|
||
return "DW_OP_reg21";
|
||
case DW_OP_reg22:
|
||
return "DW_OP_reg22";
|
||
case DW_OP_reg23:
|
||
return "DW_OP_reg23";
|
||
case DW_OP_reg24:
|
||
return "DW_OP_reg24";
|
||
case DW_OP_reg25:
|
||
return "DW_OP_reg25";
|
||
case DW_OP_reg26:
|
||
return "DW_OP_reg26";
|
||
case DW_OP_reg27:
|
||
return "DW_OP_reg27";
|
||
case DW_OP_reg28:
|
||
return "DW_OP_reg28";
|
||
case DW_OP_reg29:
|
||
return "DW_OP_reg29";
|
||
case DW_OP_reg30:
|
||
return "DW_OP_reg30";
|
||
case DW_OP_reg31:
|
||
return "DW_OP_reg31";
|
||
case DW_OP_breg0:
|
||
return "DW_OP_breg0";
|
||
case DW_OP_breg1:
|
||
return "DW_OP_breg1";
|
||
case DW_OP_breg2:
|
||
return "DW_OP_breg2";
|
||
case DW_OP_breg3:
|
||
return "DW_OP_breg3";
|
||
case DW_OP_breg4:
|
||
return "DW_OP_breg4";
|
||
case DW_OP_breg5:
|
||
return "DW_OP_breg5";
|
||
case DW_OP_breg6:
|
||
return "DW_OP_breg6";
|
||
case DW_OP_breg7:
|
||
return "DW_OP_breg7";
|
||
case DW_OP_breg8:
|
||
return "DW_OP_breg8";
|
||
case DW_OP_breg9:
|
||
return "DW_OP_breg9";
|
||
case DW_OP_breg10:
|
||
return "DW_OP_breg10";
|
||
case DW_OP_breg11:
|
||
return "DW_OP_breg11";
|
||
case DW_OP_breg12:
|
||
return "DW_OP_breg12";
|
||
case DW_OP_breg13:
|
||
return "DW_OP_breg13";
|
||
case DW_OP_breg14:
|
||
return "DW_OP_breg14";
|
||
case DW_OP_breg15:
|
||
return "DW_OP_breg15";
|
||
case DW_OP_breg16:
|
||
return "DW_OP_breg16";
|
||
case DW_OP_breg17:
|
||
return "DW_OP_breg17";
|
||
case DW_OP_breg18:
|
||
return "DW_OP_breg18";
|
||
case DW_OP_breg19:
|
||
return "DW_OP_breg19";
|
||
case DW_OP_breg20:
|
||
return "DW_OP_breg20";
|
||
case DW_OP_breg21:
|
||
return "DW_OP_breg21";
|
||
case DW_OP_breg22:
|
||
return "DW_OP_breg22";
|
||
case DW_OP_breg23:
|
||
return "DW_OP_breg23";
|
||
case DW_OP_breg24:
|
||
return "DW_OP_breg24";
|
||
case DW_OP_breg25:
|
||
return "DW_OP_breg25";
|
||
case DW_OP_breg26:
|
||
return "DW_OP_breg26";
|
||
case DW_OP_breg27:
|
||
return "DW_OP_breg27";
|
||
case DW_OP_breg28:
|
||
return "DW_OP_breg28";
|
||
case DW_OP_breg29:
|
||
return "DW_OP_breg29";
|
||
case DW_OP_breg30:
|
||
return "DW_OP_breg30";
|
||
case DW_OP_breg31:
|
||
return "DW_OP_breg31";
|
||
case DW_OP_regx:
|
||
return "DW_OP_regx";
|
||
case DW_OP_fbreg:
|
||
return "DW_OP_fbreg";
|
||
case DW_OP_bregx:
|
||
return "DW_OP_bregx";
|
||
case DW_OP_piece:
|
||
return "DW_OP_piece";
|
||
case DW_OP_deref_size:
|
||
return "DW_OP_deref_size";
|
||
case DW_OP_xderef_size:
|
||
return "DW_OP_xderef_size";
|
||
case DW_OP_nop:
|
||
return "DW_OP_nop";
|
||
/* DWARF 3 extensions. */
|
||
case DW_OP_push_object_address:
|
||
return "DW_OP_push_object_address";
|
||
case DW_OP_call2:
|
||
return "DW_OP_call2";
|
||
case DW_OP_call4:
|
||
return "DW_OP_call4";
|
||
case DW_OP_call_ref:
|
||
return "DW_OP_call_ref";
|
||
/* GNU extensions. */
|
||
case DW_OP_GNU_push_tls_address:
|
||
return "DW_OP_GNU_push_tls_address";
|
||
default:
|
||
return "OP_<unknown>";
|
||
}
|
||
}
|
||
|
||
static char *
|
||
dwarf_bool_name (unsigned mybool)
|
||
{
|
||
if (mybool)
|
||
return "TRUE";
|
||
else
|
||
return "FALSE";
|
||
}
|
||
|
||
/* Convert a DWARF type code into its string name. */
|
||
|
||
static char *
|
||
dwarf_type_encoding_name (register unsigned enc)
|
||
{
|
||
switch (enc)
|
||
{
|
||
case DW_ATE_address:
|
||
return "DW_ATE_address";
|
||
case DW_ATE_boolean:
|
||
return "DW_ATE_boolean";
|
||
case DW_ATE_complex_float:
|
||
return "DW_ATE_complex_float";
|
||
case DW_ATE_float:
|
||
return "DW_ATE_float";
|
||
case DW_ATE_signed:
|
||
return "DW_ATE_signed";
|
||
case DW_ATE_signed_char:
|
||
return "DW_ATE_signed_char";
|
||
case DW_ATE_unsigned:
|
||
return "DW_ATE_unsigned";
|
||
case DW_ATE_unsigned_char:
|
||
return "DW_ATE_unsigned_char";
|
||
case DW_ATE_imaginary_float:
|
||
return "DW_ATE_imaginary_float";
|
||
default:
|
||
return "DW_ATE_<unknown>";
|
||
}
|
||
}
|
||
|
||
/* Convert a DWARF call frame info operation to its string name. */
|
||
|
||
#if 0
|
||
static char *
|
||
dwarf_cfi_name (register unsigned cfi_opc)
|
||
{
|
||
switch (cfi_opc)
|
||
{
|
||
case DW_CFA_advance_loc:
|
||
return "DW_CFA_advance_loc";
|
||
case DW_CFA_offset:
|
||
return "DW_CFA_offset";
|
||
case DW_CFA_restore:
|
||
return "DW_CFA_restore";
|
||
case DW_CFA_nop:
|
||
return "DW_CFA_nop";
|
||
case DW_CFA_set_loc:
|
||
return "DW_CFA_set_loc";
|
||
case DW_CFA_advance_loc1:
|
||
return "DW_CFA_advance_loc1";
|
||
case DW_CFA_advance_loc2:
|
||
return "DW_CFA_advance_loc2";
|
||
case DW_CFA_advance_loc4:
|
||
return "DW_CFA_advance_loc4";
|
||
case DW_CFA_offset_extended:
|
||
return "DW_CFA_offset_extended";
|
||
case DW_CFA_restore_extended:
|
||
return "DW_CFA_restore_extended";
|
||
case DW_CFA_undefined:
|
||
return "DW_CFA_undefined";
|
||
case DW_CFA_same_value:
|
||
return "DW_CFA_same_value";
|
||
case DW_CFA_register:
|
||
return "DW_CFA_register";
|
||
case DW_CFA_remember_state:
|
||
return "DW_CFA_remember_state";
|
||
case DW_CFA_restore_state:
|
||
return "DW_CFA_restore_state";
|
||
case DW_CFA_def_cfa:
|
||
return "DW_CFA_def_cfa";
|
||
case DW_CFA_def_cfa_register:
|
||
return "DW_CFA_def_cfa_register";
|
||
case DW_CFA_def_cfa_offset:
|
||
return "DW_CFA_def_cfa_offset";
|
||
|
||
/* DWARF 3 */
|
||
case DW_CFA_def_cfa_expression:
|
||
return "DW_CFA_def_cfa_expression";
|
||
case DW_CFA_expression:
|
||
return "DW_CFA_expression";
|
||
case DW_CFA_offset_extended_sf:
|
||
return "DW_CFA_offset_extended_sf";
|
||
case DW_CFA_def_cfa_sf:
|
||
return "DW_CFA_def_cfa_sf";
|
||
case DW_CFA_def_cfa_offset_sf:
|
||
return "DW_CFA_def_cfa_offset_sf";
|
||
|
||
/* SGI/MIPS specific */
|
||
case DW_CFA_MIPS_advance_loc8:
|
||
return "DW_CFA_MIPS_advance_loc8";
|
||
|
||
/* GNU extensions */
|
||
case DW_CFA_GNU_window_save:
|
||
return "DW_CFA_GNU_window_save";
|
||
case DW_CFA_GNU_args_size:
|
||
return "DW_CFA_GNU_args_size";
|
||
case DW_CFA_GNU_negative_offset_extended:
|
||
return "DW_CFA_GNU_negative_offset_extended";
|
||
|
||
default:
|
||
return "DW_CFA_<unknown>";
|
||
}
|
||
}
|
||
#endif
|
||
|
||
static void
|
||
dump_die (struct die_info *die)
|
||
{
|
||
unsigned int i;
|
||
|
||
fprintf_unfiltered (gdb_stderr, "Die: %s (abbrev = %d, offset = %d)\n",
|
||
dwarf_tag_name (die->tag), die->abbrev, die->offset);
|
||
fprintf_unfiltered (gdb_stderr, "\thas children: %s\n",
|
||
dwarf_bool_name (die->has_children));
|
||
|
||
fprintf_unfiltered (gdb_stderr, "\tattributes:\n");
|
||
for (i = 0; i < die->num_attrs; ++i)
|
||
{
|
||
fprintf_unfiltered (gdb_stderr, "\t\t%s (%s) ",
|
||
dwarf_attr_name (die->attrs[i].name),
|
||
dwarf_form_name (die->attrs[i].form));
|
||
switch (die->attrs[i].form)
|
||
{
|
||
case DW_FORM_ref_addr:
|
||
case DW_FORM_addr:
|
||
fprintf_unfiltered (gdb_stderr, "address: ");
|
||
print_address_numeric (DW_ADDR (&die->attrs[i]), 1, gdb_stderr);
|
||
break;
|
||
case DW_FORM_block2:
|
||
case DW_FORM_block4:
|
||
case DW_FORM_block:
|
||
case DW_FORM_block1:
|
||
fprintf_unfiltered (gdb_stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
|
||
break;
|
||
case DW_FORM_data1:
|
||
case DW_FORM_data2:
|
||
case DW_FORM_data4:
|
||
case DW_FORM_data8:
|
||
case DW_FORM_ref1:
|
||
case DW_FORM_ref2:
|
||
case DW_FORM_ref4:
|
||
case DW_FORM_udata:
|
||
case DW_FORM_sdata:
|
||
fprintf_unfiltered (gdb_stderr, "constant: %ld", DW_UNSND (&die->attrs[i]));
|
||
break;
|
||
case DW_FORM_string:
|
||
case DW_FORM_strp:
|
||
fprintf_unfiltered (gdb_stderr, "string: \"%s\"",
|
||
DW_STRING (&die->attrs[i])
|
||
? DW_STRING (&die->attrs[i]) : "");
|
||
break;
|
||
case DW_FORM_flag:
|
||
if (DW_UNSND (&die->attrs[i]))
|
||
fprintf_unfiltered (gdb_stderr, "flag: TRUE");
|
||
else
|
||
fprintf_unfiltered (gdb_stderr, "flag: FALSE");
|
||
break;
|
||
case DW_FORM_indirect:
|
||
/* the reader will have reduced the indirect form to
|
||
the "base form" so this form should not occur */
|
||
fprintf_unfiltered (gdb_stderr, "unexpected attribute form: DW_FORM_indirect");
|
||
break;
|
||
default:
|
||
fprintf_unfiltered (gdb_stderr, "unsupported attribute form: %d.",
|
||
die->attrs[i].form);
|
||
}
|
||
fprintf_unfiltered (gdb_stderr, "\n");
|
||
}
|
||
}
|
||
|
||
static void
|
||
dump_die_list (struct die_info *die)
|
||
{
|
||
while (die)
|
||
{
|
||
dump_die (die);
|
||
die = die->next;
|
||
}
|
||
}
|
||
|
||
static void
|
||
store_in_ref_table (unsigned int offset, struct die_info *die)
|
||
{
|
||
int h;
|
||
struct die_info *old;
|
||
|
||
h = (offset % REF_HASH_SIZE);
|
||
old = die_ref_table[h];
|
||
die->next_ref = old;
|
||
die_ref_table[h] = die;
|
||
}
|
||
|
||
|
||
static void
|
||
dwarf2_empty_hash_tables (void)
|
||
{
|
||
memset (die_ref_table, 0, sizeof (die_ref_table));
|
||
}
|
||
|
||
static unsigned int
|
||
dwarf2_get_ref_die_offset (struct attribute *attr)
|
||
{
|
||
unsigned int result = 0;
|
||
|
||
switch (attr->form)
|
||
{
|
||
case DW_FORM_ref_addr:
|
||
result = DW_ADDR (attr);
|
||
break;
|
||
case DW_FORM_ref1:
|
||
case DW_FORM_ref2:
|
||
case DW_FORM_ref4:
|
||
case DW_FORM_ref8:
|
||
case DW_FORM_ref_udata:
|
||
result = cu_header_offset + DW_UNSND (attr);
|
||
break;
|
||
default:
|
||
complaint (&symfile_complaints,
|
||
"unsupported die ref attribute form: '%s'",
|
||
dwarf_form_name (attr->form));
|
||
}
|
||
return result;
|
||
}
|
||
|
||
static struct die_info *
|
||
follow_die_ref (unsigned int offset)
|
||
{
|
||
struct die_info *die;
|
||
int h;
|
||
|
||
h = (offset % REF_HASH_SIZE);
|
||
die = die_ref_table[h];
|
||
while (die)
|
||
{
|
||
if (die->offset == offset)
|
||
{
|
||
return die;
|
||
}
|
||
die = die->next_ref;
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
static struct type *
|
||
dwarf2_fundamental_type (struct objfile *objfile, int typeid)
|
||
{
|
||
if (typeid < 0 || typeid >= FT_NUM_MEMBERS)
|
||
{
|
||
error ("Dwarf Error: internal error - invalid fundamental type id %d [in module %s]",
|
||
typeid, objfile->name);
|
||
}
|
||
|
||
/* Look for this particular type in the fundamental type vector. If
|
||
one is not found, create and install one appropriate for the
|
||
current language and the current target machine. */
|
||
|
||
if (ftypes[typeid] == NULL)
|
||
{
|
||
ftypes[typeid] = cu_language_defn->la_fund_type (objfile, typeid);
|
||
}
|
||
|
||
return (ftypes[typeid]);
|
||
}
|
||
|
||
/* Decode simple location descriptions.
|
||
Given a pointer to a dwarf block that defines a location, compute
|
||
the location and return the value.
|
||
|
||
FIXME: This is a kludge until we figure out a better
|
||
way to handle the location descriptions.
|
||
Gdb's design does not mesh well with the DWARF2 notion of a location
|
||
computing interpreter, which is a shame because the flexibility goes unused.
|
||
FIXME: Implement more operations as necessary.
|
||
|
||
A location description containing no operations indicates that the
|
||
object is optimized out. The global optimized_out flag is set for
|
||
those, the return value is meaningless.
|
||
|
||
When the result is a register number, the global isreg flag is set,
|
||
otherwise it is cleared.
|
||
|
||
When the result is a base register offset, the global offreg flag is set
|
||
and the register number is returned in basereg, otherwise it is cleared.
|
||
|
||
When the DW_OP_fbreg operation is encountered without a corresponding
|
||
DW_AT_frame_base attribute, the global islocal flag is set.
|
||
Hopefully the machine dependent code knows how to set up a virtual
|
||
frame pointer for the local references.
|
||
|
||
Note that stack[0] is unused except as a default error return.
|
||
Note that stack overflow is not yet handled. */
|
||
|
||
static CORE_ADDR
|
||
decode_locdesc (struct dwarf_block *blk, struct objfile *objfile,
|
||
const struct comp_unit_head *cu_header)
|
||
{
|
||
int i;
|
||
int size = blk->size;
|
||
char *data = blk->data;
|
||
CORE_ADDR stack[64];
|
||
int stacki;
|
||
unsigned int bytes_read, unsnd;
|
||
unsigned char op;
|
||
|
||
i = 0;
|
||
stacki = 0;
|
||
stack[stacki] = 0;
|
||
isreg = 0;
|
||
offreg = 0;
|
||
isderef = 0;
|
||
islocal = 0;
|
||
is_thread_local = 0;
|
||
optimized_out = 1;
|
||
|
||
while (i < size)
|
||
{
|
||
optimized_out = 0;
|
||
op = data[i++];
|
||
switch (op)
|
||
{
|
||
case DW_OP_lit0:
|
||
case DW_OP_lit1:
|
||
case DW_OP_lit2:
|
||
case DW_OP_lit3:
|
||
case DW_OP_lit4:
|
||
case DW_OP_lit5:
|
||
case DW_OP_lit6:
|
||
case DW_OP_lit7:
|
||
case DW_OP_lit8:
|
||
case DW_OP_lit9:
|
||
case DW_OP_lit10:
|
||
case DW_OP_lit11:
|
||
case DW_OP_lit12:
|
||
case DW_OP_lit13:
|
||
case DW_OP_lit14:
|
||
case DW_OP_lit15:
|
||
case DW_OP_lit16:
|
||
case DW_OP_lit17:
|
||
case DW_OP_lit18:
|
||
case DW_OP_lit19:
|
||
case DW_OP_lit20:
|
||
case DW_OP_lit21:
|
||
case DW_OP_lit22:
|
||
case DW_OP_lit23:
|
||
case DW_OP_lit24:
|
||
case DW_OP_lit25:
|
||
case DW_OP_lit26:
|
||
case DW_OP_lit27:
|
||
case DW_OP_lit28:
|
||
case DW_OP_lit29:
|
||
case DW_OP_lit30:
|
||
case DW_OP_lit31:
|
||
stack[++stacki] = op - DW_OP_lit0;
|
||
break;
|
||
|
||
case DW_OP_reg0:
|
||
case DW_OP_reg1:
|
||
case DW_OP_reg2:
|
||
case DW_OP_reg3:
|
||
case DW_OP_reg4:
|
||
case DW_OP_reg5:
|
||
case DW_OP_reg6:
|
||
case DW_OP_reg7:
|
||
case DW_OP_reg8:
|
||
case DW_OP_reg9:
|
||
case DW_OP_reg10:
|
||
case DW_OP_reg11:
|
||
case DW_OP_reg12:
|
||
case DW_OP_reg13:
|
||
case DW_OP_reg14:
|
||
case DW_OP_reg15:
|
||
case DW_OP_reg16:
|
||
case DW_OP_reg17:
|
||
case DW_OP_reg18:
|
||
case DW_OP_reg19:
|
||
case DW_OP_reg20:
|
||
case DW_OP_reg21:
|
||
case DW_OP_reg22:
|
||
case DW_OP_reg23:
|
||
case DW_OP_reg24:
|
||
case DW_OP_reg25:
|
||
case DW_OP_reg26:
|
||
case DW_OP_reg27:
|
||
case DW_OP_reg28:
|
||
case DW_OP_reg29:
|
||
case DW_OP_reg30:
|
||
case DW_OP_reg31:
|
||
isreg = 1;
|
||
stack[++stacki] = op - DW_OP_reg0;
|
||
break;
|
||
|
||
case DW_OP_regx:
|
||
isreg = 1;
|
||
unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
|
||
i += bytes_read;
|
||
stack[++stacki] = unsnd;
|
||
break;
|
||
|
||
case DW_OP_breg0:
|
||
case DW_OP_breg1:
|
||
case DW_OP_breg2:
|
||
case DW_OP_breg3:
|
||
case DW_OP_breg4:
|
||
case DW_OP_breg5:
|
||
case DW_OP_breg6:
|
||
case DW_OP_breg7:
|
||
case DW_OP_breg8:
|
||
case DW_OP_breg9:
|
||
case DW_OP_breg10:
|
||
case DW_OP_breg11:
|
||
case DW_OP_breg12:
|
||
case DW_OP_breg13:
|
||
case DW_OP_breg14:
|
||
case DW_OP_breg15:
|
||
case DW_OP_breg16:
|
||
case DW_OP_breg17:
|
||
case DW_OP_breg18:
|
||
case DW_OP_breg19:
|
||
case DW_OP_breg20:
|
||
case DW_OP_breg21:
|
||
case DW_OP_breg22:
|
||
case DW_OP_breg23:
|
||
case DW_OP_breg24:
|
||
case DW_OP_breg25:
|
||
case DW_OP_breg26:
|
||
case DW_OP_breg27:
|
||
case DW_OP_breg28:
|
||
case DW_OP_breg29:
|
||
case DW_OP_breg30:
|
||
case DW_OP_breg31:
|
||
offreg = 1;
|
||
basereg = op - DW_OP_breg0;
|
||
stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
|
||
i += bytes_read;
|
||
break;
|
||
|
||
case DW_OP_bregx:
|
||
offreg = 1;
|
||
basereg = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
|
||
i += bytes_read;
|
||
stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
|
||
i += bytes_read;
|
||
break;
|
||
|
||
case DW_OP_fbreg:
|
||
stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
|
||
i += bytes_read;
|
||
if (frame_base_reg >= 0)
|
||
{
|
||
offreg = 1;
|
||
basereg = frame_base_reg;
|
||
stack[stacki] += frame_base_offset;
|
||
}
|
||
else
|
||
{
|
||
complaint (&symfile_complaints,
|
||
"DW_AT_frame_base missing for DW_OP_fbreg");
|
||
islocal = 1;
|
||
}
|
||
break;
|
||
|
||
case DW_OP_addr:
|
||
stack[++stacki] = read_address (objfile->obfd, &data[i],
|
||
cu_header, &bytes_read);
|
||
i += bytes_read;
|
||
break;
|
||
|
||
case DW_OP_const1u:
|
||
stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
|
||
i += 1;
|
||
break;
|
||
|
||
case DW_OP_const1s:
|
||
stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
|
||
i += 1;
|
||
break;
|
||
|
||
case DW_OP_const2u:
|
||
stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
|
||
i += 2;
|
||
break;
|
||
|
||
case DW_OP_const2s:
|
||
stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
|
||
i += 2;
|
||
break;
|
||
|
||
case DW_OP_const4u:
|
||
stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
|
||
i += 4;
|
||
break;
|
||
|
||
case DW_OP_const4s:
|
||
stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
|
||
i += 4;
|
||
break;
|
||
|
||
case DW_OP_constu:
|
||
stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
|
||
&bytes_read);
|
||
i += bytes_read;
|
||
break;
|
||
|
||
case DW_OP_consts:
|
||
stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
|
||
i += bytes_read;
|
||
break;
|
||
|
||
case DW_OP_dup:
|
||
stack[stacki + 1] = stack[stacki];
|
||
stacki++;
|
||
break;
|
||
|
||
case DW_OP_plus:
|
||
stack[stacki - 1] += stack[stacki];
|
||
stacki--;
|
||
break;
|
||
|
||
case DW_OP_plus_uconst:
|
||
stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
|
||
i += bytes_read;
|
||
break;
|
||
|
||
case DW_OP_minus:
|
||
stack[stacki - 1] -= stack[stacki];
|
||
stacki--;
|
||
break;
|
||
|
||
case DW_OP_deref:
|
||
isderef = 1;
|
||
/* If we're not the last op, then we definitely can't encode
|
||
this using GDB's address_class enum. */
|
||
if (i < size)
|
||
dwarf2_complex_location_expr_complaint ();
|
||
break;
|
||
|
||
case DW_OP_GNU_push_tls_address:
|
||
is_thread_local = 1;
|
||
/* The top of the stack has the offset from the beginning
|
||
of the thread control block at which the variable is located. */
|
||
/* Nothing should follow this operator, so the top of stack would
|
||
be returned. */
|
||
if (i < size)
|
||
dwarf2_complex_location_expr_complaint ();
|
||
break;
|
||
|
||
default:
|
||
complaint (&symfile_complaints, "unsupported stack op: '%s'",
|
||
dwarf_stack_op_name (op));
|
||
return (stack[stacki]);
|
||
}
|
||
}
|
||
return (stack[stacki]);
|
||
}
|
||
|
||
/* memory allocation interface */
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
dwarf2_free_tmp_obstack (void *ignore)
|
||
{
|
||
obstack_free (&dwarf2_tmp_obstack, NULL);
|
||
}
|
||
|
||
static struct dwarf_block *
|
||
dwarf_alloc_block (void)
|
||
{
|
||
struct dwarf_block *blk;
|
||
|
||
blk = (struct dwarf_block *)
|
||
obstack_alloc (&dwarf2_tmp_obstack, sizeof (struct dwarf_block));
|
||
return (blk);
|
||
}
|
||
|
||
static struct abbrev_info *
|
||
dwarf_alloc_abbrev (void)
|
||
{
|
||
struct abbrev_info *abbrev;
|
||
|
||
abbrev = (struct abbrev_info *) xmalloc (sizeof (struct abbrev_info));
|
||
memset (abbrev, 0, sizeof (struct abbrev_info));
|
||
return (abbrev);
|
||
}
|
||
|
||
static struct die_info *
|
||
dwarf_alloc_die (void)
|
||
{
|
||
struct die_info *die;
|
||
|
||
die = (struct die_info *) xmalloc (sizeof (struct die_info));
|
||
memset (die, 0, sizeof (struct die_info));
|
||
return (die);
|
||
}
|
||
|
||
|
||
/* Macro support. */
|
||
|
||
|
||
/* Return the full name of file number I in *LH's file name table.
|
||
Use COMP_DIR as the name of the current directory of the
|
||
compilation. The result is allocated using xmalloc; the caller is
|
||
responsible for freeing it. */
|
||
static char *
|
||
file_full_name (int file, struct line_header *lh, const char *comp_dir)
|
||
{
|
||
struct file_entry *fe = &lh->file_names[file - 1];
|
||
|
||
if (IS_ABSOLUTE_PATH (fe->name))
|
||
return xstrdup (fe->name);
|
||
else
|
||
{
|
||
const char *dir;
|
||
int dir_len;
|
||
char *full_name;
|
||
|
||
if (fe->dir_index)
|
||
dir = lh->include_dirs[fe->dir_index - 1];
|
||
else
|
||
dir = comp_dir;
|
||
|
||
if (dir)
|
||
{
|
||
dir_len = strlen (dir);
|
||
full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
|
||
strcpy (full_name, dir);
|
||
full_name[dir_len] = '/';
|
||
strcpy (full_name + dir_len + 1, fe->name);
|
||
return full_name;
|
||
}
|
||
else
|
||
return xstrdup (fe->name);
|
||
}
|
||
}
|
||
|
||
|
||
static struct macro_source_file *
|
||
macro_start_file (int file, int line,
|
||
struct macro_source_file *current_file,
|
||
const char *comp_dir,
|
||
struct line_header *lh, struct objfile *objfile)
|
||
{
|
||
/* The full name of this source file. */
|
||
char *full_name = file_full_name (file, lh, comp_dir);
|
||
|
||
/* We don't create a macro table for this compilation unit
|
||
at all until we actually get a filename. */
|
||
if (! pending_macros)
|
||
pending_macros = new_macro_table (&objfile->symbol_obstack,
|
||
objfile->macro_cache);
|
||
|
||
if (! current_file)
|
||
/* If we have no current file, then this must be the start_file
|
||
directive for the compilation unit's main source file. */
|
||
current_file = macro_set_main (pending_macros, full_name);
|
||
else
|
||
current_file = macro_include (current_file, line, full_name);
|
||
|
||
xfree (full_name);
|
||
|
||
return current_file;
|
||
}
|
||
|
||
|
||
/* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
|
||
followed by a null byte. */
|
||
static char *
|
||
copy_string (const char *buf, int len)
|
||
{
|
||
char *s = xmalloc (len + 1);
|
||
memcpy (s, buf, len);
|
||
s[len] = '\0';
|
||
|
||
return s;
|
||
}
|
||
|
||
|
||
static const char *
|
||
consume_improper_spaces (const char *p, const char *body)
|
||
{
|
||
if (*p == ' ')
|
||
{
|
||
complaint (&symfile_complaints,
|
||
"macro definition contains spaces in formal argument list:\n`%s'",
|
||
body);
|
||
|
||
while (*p == ' ')
|
||
p++;
|
||
}
|
||
|
||
return p;
|
||
}
|
||
|
||
|
||
static void
|
||
parse_macro_definition (struct macro_source_file *file, int line,
|
||
const char *body)
|
||
{
|
||
const char *p;
|
||
|
||
/* The body string takes one of two forms. For object-like macro
|
||
definitions, it should be:
|
||
|
||
<macro name> " " <definition>
|
||
|
||
For function-like macro definitions, it should be:
|
||
|
||
<macro name> "() " <definition>
|
||
or
|
||
<macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
|
||
|
||
Spaces may appear only where explicitly indicated, and in the
|
||
<definition>.
|
||
|
||
The Dwarf 2 spec says that an object-like macro's name is always
|
||
followed by a space, but versions of GCC around March 2002 omit
|
||
the space when the macro's definition is the empty string.
|
||
|
||
The Dwarf 2 spec says that there should be no spaces between the
|
||
formal arguments in a function-like macro's formal argument list,
|
||
but versions of GCC around March 2002 include spaces after the
|
||
commas. */
|
||
|
||
|
||
/* Find the extent of the macro name. The macro name is terminated
|
||
by either a space or null character (for an object-like macro) or
|
||
an opening paren (for a function-like macro). */
|
||
for (p = body; *p; p++)
|
||
if (*p == ' ' || *p == '(')
|
||
break;
|
||
|
||
if (*p == ' ' || *p == '\0')
|
||
{
|
||
/* It's an object-like macro. */
|
||
int name_len = p - body;
|
||
char *name = copy_string (body, name_len);
|
||
const char *replacement;
|
||
|
||
if (*p == ' ')
|
||
replacement = body + name_len + 1;
|
||
else
|
||
{
|
||
dwarf2_macro_malformed_definition_complaint (body);
|
||
replacement = body + name_len;
|
||
}
|
||
|
||
macro_define_object (file, line, name, replacement);
|
||
|
||
xfree (name);
|
||
}
|
||
else if (*p == '(')
|
||
{
|
||
/* It's a function-like macro. */
|
||
char *name = copy_string (body, p - body);
|
||
int argc = 0;
|
||
int argv_size = 1;
|
||
char **argv = xmalloc (argv_size * sizeof (*argv));
|
||
|
||
p++;
|
||
|
||
p = consume_improper_spaces (p, body);
|
||
|
||
/* Parse the formal argument list. */
|
||
while (*p && *p != ')')
|
||
{
|
||
/* Find the extent of the current argument name. */
|
||
const char *arg_start = p;
|
||
|
||
while (*p && *p != ',' && *p != ')' && *p != ' ')
|
||
p++;
|
||
|
||
if (! *p || p == arg_start)
|
||
dwarf2_macro_malformed_definition_complaint (body);
|
||
else
|
||
{
|
||
/* Make sure argv has room for the new argument. */
|
||
if (argc >= argv_size)
|
||
{
|
||
argv_size *= 2;
|
||
argv = xrealloc (argv, argv_size * sizeof (*argv));
|
||
}
|
||
|
||
argv[argc++] = copy_string (arg_start, p - arg_start);
|
||
}
|
||
|
||
p = consume_improper_spaces (p, body);
|
||
|
||
/* Consume the comma, if present. */
|
||
if (*p == ',')
|
||
{
|
||
p++;
|
||
|
||
p = consume_improper_spaces (p, body);
|
||
}
|
||
}
|
||
|
||
if (*p == ')')
|
||
{
|
||
p++;
|
||
|
||
if (*p == ' ')
|
||
/* Perfectly formed definition, no complaints. */
|
||
macro_define_function (file, line, name,
|
||
argc, (const char **) argv,
|
||
p + 1);
|
||
else if (*p == '\0')
|
||
{
|
||
/* Complain, but do define it. */
|
||
dwarf2_macro_malformed_definition_complaint (body);
|
||
macro_define_function (file, line, name,
|
||
argc, (const char **) argv,
|
||
p);
|
||
}
|
||
else
|
||
/* Just complain. */
|
||
dwarf2_macro_malformed_definition_complaint (body);
|
||
}
|
||
else
|
||
/* Just complain. */
|
||
dwarf2_macro_malformed_definition_complaint (body);
|
||
|
||
xfree (name);
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < argc; i++)
|
||
xfree (argv[i]);
|
||
}
|
||
xfree (argv);
|
||
}
|
||
else
|
||
dwarf2_macro_malformed_definition_complaint (body);
|
||
}
|
||
|
||
|
||
static void
|
||
dwarf_decode_macros (struct line_header *lh, unsigned int offset,
|
||
char *comp_dir, bfd *abfd,
|
||
const struct comp_unit_head *cu_header,
|
||
struct objfile *objfile)
|
||
{
|
||
char *mac_ptr, *mac_end;
|
||
struct macro_source_file *current_file = 0;
|
||
|
||
if (dwarf_macinfo_buffer == NULL)
|
||
{
|
||
complaint (&symfile_complaints, "missing .debug_macinfo section");
|
||
return;
|
||
}
|
||
|
||
mac_ptr = dwarf_macinfo_buffer + offset;
|
||
mac_end = dwarf_macinfo_buffer + dwarf_macinfo_size;
|
||
|
||
for (;;)
|
||
{
|
||
enum dwarf_macinfo_record_type macinfo_type;
|
||
|
||
/* Do we at least have room for a macinfo type byte? */
|
||
if (mac_ptr >= mac_end)
|
||
{
|
||
dwarf2_macros_too_long_complaint ();
|
||
return;
|
||
}
|
||
|
||
macinfo_type = read_1_byte (abfd, mac_ptr);
|
||
mac_ptr++;
|
||
|
||
switch (macinfo_type)
|
||
{
|
||
/* A zero macinfo type indicates the end of the macro
|
||
information. */
|
||
case 0:
|
||
return;
|
||
|
||
case DW_MACINFO_define:
|
||
case DW_MACINFO_undef:
|
||
{
|
||
int bytes_read;
|
||
int line;
|
||
char *body;
|
||
|
||
line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
|
||
mac_ptr += bytes_read;
|
||
body = read_string (abfd, mac_ptr, &bytes_read);
|
||
mac_ptr += bytes_read;
|
||
|
||
if (! current_file)
|
||
complaint (&symfile_complaints,
|
||
"debug info gives macro %s outside of any file: %s",
|
||
macinfo_type ==
|
||
DW_MACINFO_define ? "definition" : macinfo_type ==
|
||
DW_MACINFO_undef ? "undefinition" :
|
||
"something-or-other", body);
|
||
else
|
||
{
|
||
if (macinfo_type == DW_MACINFO_define)
|
||
parse_macro_definition (current_file, line, body);
|
||
else if (macinfo_type == DW_MACINFO_undef)
|
||
macro_undef (current_file, line, body);
|
||
}
|
||
}
|
||
break;
|
||
|
||
case DW_MACINFO_start_file:
|
||
{
|
||
int bytes_read;
|
||
int line, file;
|
||
|
||
line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
|
||
mac_ptr += bytes_read;
|
||
file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
|
||
mac_ptr += bytes_read;
|
||
|
||
current_file = macro_start_file (file, line,
|
||
current_file, comp_dir,
|
||
lh, objfile);
|
||
}
|
||
break;
|
||
|
||
case DW_MACINFO_end_file:
|
||
if (! current_file)
|
||
complaint (&symfile_complaints,
|
||
"macro debug info has an unmatched `close_file' directive");
|
||
else
|
||
{
|
||
current_file = current_file->included_by;
|
||
if (! current_file)
|
||
{
|
||
enum dwarf_macinfo_record_type next_type;
|
||
|
||
/* GCC circa March 2002 doesn't produce the zero
|
||
type byte marking the end of the compilation
|
||
unit. Complain if it's not there, but exit no
|
||
matter what. */
|
||
|
||
/* Do we at least have room for a macinfo type byte? */
|
||
if (mac_ptr >= mac_end)
|
||
{
|
||
dwarf2_macros_too_long_complaint ();
|
||
return;
|
||
}
|
||
|
||
/* We don't increment mac_ptr here, so this is just
|
||
a look-ahead. */
|
||
next_type = read_1_byte (abfd, mac_ptr);
|
||
if (next_type != 0)
|
||
complaint (&symfile_complaints,
|
||
"no terminating 0-type entry for macros in `.debug_macinfo' section");
|
||
|
||
return;
|
||
}
|
||
}
|
||
break;
|
||
|
||
case DW_MACINFO_vendor_ext:
|
||
{
|
||
int bytes_read;
|
||
int constant;
|
||
char *string;
|
||
|
||
constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
|
||
mac_ptr += bytes_read;
|
||
string = read_string (abfd, mac_ptr, &bytes_read);
|
||
mac_ptr += bytes_read;
|
||
|
||
/* We don't recognize any vendor extensions. */
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Check if the attribute's form is a DW_FORM_block*
|
||
if so return true else false. */
|
||
static int
|
||
attr_form_is_block (struct attribute *attr)
|
||
{
|
||
return (attr == NULL ? 0 :
|
||
attr->form == DW_FORM_block1
|
||
|| attr->form == DW_FORM_block2
|
||
|| attr->form == DW_FORM_block4
|
||
|| attr->form == DW_FORM_block);
|
||
}
|
||
|
||
static void
|
||
dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
|
||
const struct comp_unit_head *cu_header,
|
||
struct objfile *objfile)
|
||
{
|
||
if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
|
||
{
|
||
struct dwarf2_loclist_baton *baton;
|
||
|
||
baton = obstack_alloc (&objfile->symbol_obstack,
|
||
sizeof (struct dwarf2_loclist_baton));
|
||
baton->objfile = objfile;
|
||
|
||
/* We don't know how long the location list is, but make sure we
|
||
don't run off the edge of the section. */
|
||
baton->size = dwarf_loc_size - DW_UNSND (attr);
|
||
baton->data = dwarf_loc_buffer + DW_UNSND (attr);
|
||
baton->base_address = cu_header->base_address;
|
||
if (cu_header->base_known == 0)
|
||
complaint (&symfile_complaints,
|
||
"Location list used without specifying the CU base address.");
|
||
|
||
SYMBOL_LOCATION_FUNCS (sym) = &dwarf2_loclist_funcs;
|
||
SYMBOL_LOCATION_BATON (sym) = baton;
|
||
}
|
||
else
|
||
{
|
||
struct dwarf2_locexpr_baton *baton;
|
||
|
||
baton = obstack_alloc (&objfile->symbol_obstack,
|
||
sizeof (struct dwarf2_locexpr_baton));
|
||
baton->objfile = objfile;
|
||
|
||
if (attr_form_is_block (attr))
|
||
{
|
||
/* Note that we're just copying the block's data pointer
|
||
here, not the actual data. We're still pointing into the
|
||
dwarf_info_buffer for SYM's objfile; right now we never
|
||
release that buffer, but when we do clean up properly
|
||
this may need to change. */
|
||
baton->size = DW_BLOCK (attr)->size;
|
||
baton->data = DW_BLOCK (attr)->data;
|
||
}
|
||
else
|
||
{
|
||
dwarf2_invalid_attrib_class_complaint ("location description",
|
||
SYMBOL_NATURAL_NAME (sym));
|
||
baton->size = 0;
|
||
baton->data = NULL;
|
||
}
|
||
|
||
SYMBOL_LOCATION_FUNCS (sym) = &dwarf2_locexpr_funcs;
|
||
SYMBOL_LOCATION_BATON (sym) = baton;
|
||
}
|
||
}
|