5937 lines
162 KiB
C
5937 lines
162 KiB
C
/* DWARF 2 debugging format support for GDB.
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Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
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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 "language.h"
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#include "complaints.h"
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#include "bcache.h"
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#include <fcntl.h>
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#include "gdb_string.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 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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/* 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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/* local data types */
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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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};
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/* The data in the .debug_line statement prologue looks like this. */
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struct line_head
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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 prologue_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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unsigned char *standard_opcode_lengths;
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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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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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/* 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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/* We only hold one compilation unit's abbrevs in
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memory at any one 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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#ifndef ATTR_ALLOC_CHUNK
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#define ATTR_ALLOC_CHUNK 4
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#endif
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static struct abbrev_info *dwarf2_abbrevs[ABBREV_HASH_SIZE];
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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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/* 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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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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/* 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. */
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static int isreg; /* Object lives in register.
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decode_locdesc's return value is
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the register number. */
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static int offreg; /* Object's address is the sum of the
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register specified by basereg, plus
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the offset returned. */
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static int basereg; /* See `offreg'. */
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static int isderef; /* Value described by flags above is
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the address of a pointer to the object. */
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static int islocal; /* Variable is at the returned offset
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from the frame start, but there's
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no identified frame pointer for
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this function, so we can't say
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which register it's relative to;
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use LOC_LOCAL. */
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/* DW_AT_frame_base values for the current function.
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frame_base_reg is -1 if DW_AT_frame_base is missing, otherwise it
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contains the register number for the frame register.
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frame_base_offset is the offset from the frame register to the
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virtual stack frame. */
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static int frame_base_reg;
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static CORE_ADDR frame_base_offset;
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/* This value is added to each symbol value. FIXME: Generalize to
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the section_offsets structure used by dbxread (once this is done,
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pass the appropriate section number to end_symtab). */
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static CORE_ADDR baseaddr; /* Add to each symbol value */
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/* We put a pointer to this structure in the read_symtab_private field
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of the psymtab.
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The complete dwarf information for an objfile is kept in the
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psymbol_obstack, so that absolute die references can be handled.
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Most of the information in this structure is related to an entire
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object file and could be passed via the sym_private field of the objfile.
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It is however conceivable that dwarf2 might not be the only type
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of symbols read from an object file. */
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struct dwarf2_pinfo
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{
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/* Pointer to start of dwarf info buffer for the objfile. */
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char *dwarf_info_buffer;
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/* Offset in dwarf_info_buffer for this compilation unit. */
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unsigned long dwarf_info_offset;
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/* Pointer to start of dwarf abbreviation buffer for the objfile. */
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char *dwarf_abbrev_buffer;
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/* Size of dwarf abbreviation section for the objfile. */
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unsigned int dwarf_abbrev_size;
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/* Pointer to start of dwarf line buffer for the objfile. */
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char *dwarf_line_buffer;
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};
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#define PST_PRIVATE(p) ((struct dwarf2_pinfo *)(p)->read_symtab_private)
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#define DWARF_INFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_info_buffer)
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#define DWARF_INFO_OFFSET(p) (PST_PRIVATE(p)->dwarf_info_offset)
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#define DWARF_ABBREV_BUFFER(p) (PST_PRIVATE(p)->dwarf_abbrev_buffer)
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#define DWARF_ABBREV_SIZE(p) (PST_PRIVATE(p)->dwarf_abbrev_size)
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#define DWARF_LINE_BUFFER(p) (PST_PRIVATE(p)->dwarf_line_buffer)
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/* Maintain an array of referenced fundamental types for the current
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compilation unit being read. For DWARF version 1, we have to construct
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the fundamental types on the fly, since no information about the
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fundamental types is supplied. Each such fundamental type is created by
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calling a language dependent routine to create the type, and then a
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pointer to that type is then placed in the array at the index specified
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by it's FT_<TYPENAME> value. The array has a fixed size set by the
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FT_NUM_MEMBERS compile time constant, which is the number of predefined
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fundamental types gdb knows how to construct. */
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static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */
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/* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
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but this would require a corresponding change in unpack_field_as_long
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and friends. */
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static int bits_per_byte = 8;
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/* The routines that read and process dies for a C struct or C++ class
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pass lists of data member fields and lists of member function fields
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in an instance of a field_info structure, as defined below. */
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struct field_info
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{
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/* List of data member and baseclasses fields. */
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struct nextfield
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{
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struct nextfield *next;
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int accessibility;
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int virtuality;
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struct field field;
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}
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*fields;
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/* Number of fields. */
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int nfields;
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/* Number of baseclasses. */
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int nbaseclasses;
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/* Set if the accesibility of one of the fields is not public. */
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int non_public_fields;
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/* Member function fields array, entries are allocated in the order they
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are encountered in the object file. */
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struct nextfnfield
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{
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struct nextfnfield *next;
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struct fn_field fnfield;
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}
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*fnfields;
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/* Member function fieldlist array, contains name of possibly overloaded
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member function, number of overloaded member functions and a pointer
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to the head of the member function field chain. */
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struct fnfieldlist
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{
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char *name;
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int length;
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struct nextfnfield *head;
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}
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*fnfieldlists;
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/* Number of entries in the fnfieldlists array. */
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int nfnfields;
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};
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/* FIXME: Kludge to mark a varargs function type for C++ member function
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argument processing. */
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#define TYPE_FLAG_VARARGS (1 << 10)
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/* Dwarf2 has no clean way to discern C++ static and non-static member
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functions. G++ helps GDB by marking the first parameter for non-static
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member functions (which is the this pointer) as artificial.
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We pass this information between dwarf2_add_member_fn and
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read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
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#define TYPE_FIELD_ARTIFICIAL TYPE_FIELD_BITPOS
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/* Various complaints about symbol reading that don't abort the process */
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static struct complaint dwarf2_const_ignored =
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{
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"type qualifier 'const' ignored", 0, 0
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};
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static struct complaint dwarf2_volatile_ignored =
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{
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"type qualifier 'volatile' ignored", 0, 0
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};
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static struct complaint dwarf2_non_const_array_bound_ignored =
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{
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"non-constant array bounds form '%s' ignored", 0, 0
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};
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static struct complaint dwarf2_missing_line_number_section =
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{
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"missing .debug_line section", 0, 0
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};
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static struct complaint dwarf2_mangled_line_number_section =
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{
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"mangled .debug_line section", 0, 0
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};
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static struct complaint dwarf2_unsupported_die_ref_attr =
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{
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"unsupported die ref attribute form: '%s'", 0, 0
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};
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static struct complaint dwarf2_unsupported_stack_op =
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{
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"unsupported stack op: '%s'", 0, 0
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};
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static struct complaint dwarf2_complex_location_expr =
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{
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"location expression too complex", 0, 0
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};
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static struct complaint dwarf2_unsupported_tag =
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{
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"unsupported tag: '%s'", 0, 0
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};
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static struct complaint dwarf2_unsupported_at_encoding =
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{
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"unsupported DW_AT_encoding: '%s'", 0, 0
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};
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static struct complaint dwarf2_unsupported_at_frame_base =
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{
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"unsupported DW_AT_frame_base for function '%s'", 0, 0
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};
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static struct complaint dwarf2_unexpected_tag =
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{
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"unexepected tag in read_type_die: '%s'", 0, 0
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};
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static struct complaint dwarf2_missing_at_frame_base =
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{
|
|
"DW_AT_frame_base missing for DW_OP_fbreg", 0, 0
|
|
};
|
|
static struct complaint dwarf2_bad_static_member_name =
|
|
{
|
|
"unrecognized static data member name '%s'", 0, 0
|
|
};
|
|
static struct complaint dwarf2_unsupported_accessibility =
|
|
{
|
|
"unsupported accessibility %d", 0, 0
|
|
};
|
|
static struct complaint dwarf2_bad_member_name_complaint =
|
|
{
|
|
"cannot extract member name from '%s'", 0, 0
|
|
};
|
|
static struct complaint dwarf2_missing_member_fn_type_complaint =
|
|
{
|
|
"member function type missing for '%s'", 0, 0
|
|
};
|
|
static struct complaint dwarf2_vtbl_not_found_complaint =
|
|
{
|
|
"virtual function table pointer not found when defining class '%s'", 0, 0
|
|
};
|
|
static struct complaint dwarf2_absolute_sibling_complaint =
|
|
{
|
|
"ignoring absolute DW_AT_sibling", 0, 0
|
|
};
|
|
static struct complaint dwarf2_const_value_length_mismatch =
|
|
{
|
|
"const value length mismatch for '%s', got %d, expected %d", 0, 0
|
|
};
|
|
static struct complaint dwarf2_unsupported_const_value_attr =
|
|
{
|
|
"unsupported const value attribute form: '%s'", 0, 0
|
|
};
|
|
|
|
/* Externals references. */
|
|
extern int info_verbose; /* From main.c; nonzero => verbose */
|
|
|
|
/* local function prototypes */
|
|
|
|
static void dwarf2_locate_sections (bfd *, asection *, PTR);
|
|
|
|
#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 *);
|
|
|
|
static char *dwarf2_read_section (struct objfile *, file_ptr, unsigned int);
|
|
|
|
static void dwarf2_read_abbrevs (bfd *, unsigned int);
|
|
|
|
static void dwarf2_empty_abbrev_table (PTR);
|
|
|
|
static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int);
|
|
|
|
static char *read_partial_die (struct partial_die_info *,
|
|
bfd *, char *, int *,
|
|
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 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 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 dwarf_decode_lines (unsigned int, 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 *);
|
|
|
|
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_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 *);
|
|
|
|
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 *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
|
|
|
|
struct die_info *sibling_die (struct die_info *);
|
|
|
|
void dump_die (struct die_info *);
|
|
|
|
void dump_die_list (struct die_info *);
|
|
|
|
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 *);
|
|
|
|
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 (PTR);
|
|
|
|
static struct dwarf_block *dwarf_alloc_block (void);
|
|
|
|
static struct abbrev_info *dwarf_alloc_abbrev (void);
|
|
|
|
static struct die_info *dwarf_alloc_die (void);
|
|
|
|
/* 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 = dwarf_abbrev_offset = dwarf_line_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, PTR ignore_ptr)
|
|
{
|
|
if (STREQ (sectp->name, INFO_SECTION))
|
|
{
|
|
dwarf_info_offset = sectp->filepos;
|
|
dwarf_info_size = bfd_get_section_size_before_reloc (sectp);
|
|
}
|
|
else if (STREQ (sectp->name, ABBREV_SECTION))
|
|
{
|
|
dwarf_abbrev_offset = sectp->filepos;
|
|
dwarf_abbrev_size = bfd_get_section_size_before_reloc (sectp);
|
|
}
|
|
else if (STREQ (sectp->name, LINE_SECTION))
|
|
{
|
|
dwarf_line_offset = sectp->filepos;
|
|
dwarf_line_size = bfd_get_section_size_before_reloc (sectp);
|
|
}
|
|
else if (STREQ (sectp->name, PUBNAMES_SECTION))
|
|
{
|
|
dwarf_pubnames_offset = sectp->filepos;
|
|
dwarf_pubnames_size = bfd_get_section_size_before_reloc (sectp);
|
|
}
|
|
else if (STREQ (sectp->name, ARANGES_SECTION))
|
|
{
|
|
dwarf_aranges_offset = sectp->filepos;
|
|
dwarf_aranges_size = bfd_get_section_size_before_reloc (sectp);
|
|
}
|
|
else if (STREQ (sectp->name, LOC_SECTION))
|
|
{
|
|
dwarf_loc_offset = sectp->filepos;
|
|
dwarf_loc_size = bfd_get_section_size_before_reloc (sectp);
|
|
}
|
|
else if (STREQ (sectp->name, MACINFO_SECTION))
|
|
{
|
|
dwarf_macinfo_offset = sectp->filepos;
|
|
dwarf_macinfo_size = bfd_get_section_size_before_reloc (sectp);
|
|
}
|
|
else if (STREQ (sectp->name, STR_SECTION))
|
|
{
|
|
dwarf_str_offset = sectp->filepos;
|
|
dwarf_str_size = bfd_get_section_size_before_reloc (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_abbrev_buffer = dwarf2_read_section (objfile,
|
|
dwarf_abbrev_offset,
|
|
dwarf_abbrev_size);
|
|
dwarf_line_buffer = dwarf2_read_section (objfile,
|
|
dwarf_line_offset,
|
|
dwarf_line_size);
|
|
|
|
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);
|
|
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);
|
|
|
|
}
|
|
#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;
|
|
int comp_unit_has_pc_info;
|
|
CORE_ADDR lowpc, highpc;
|
|
|
|
info_ptr = dwarf_info_buffer;
|
|
abbrev_ptr = dwarf_abbrev_buffer;
|
|
|
|
obstack_init (&dwarf2_tmp_obstack);
|
|
back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL);
|
|
|
|
while ((unsigned int) (info_ptr - dwarf_info_buffer)
|
|
+ ((info_ptr - dwarf_info_buffer) % 4) < 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.");
|
|
return;
|
|
}
|
|
if (cu_header.abbrev_offset >= dwarf_abbrev_size)
|
|
{
|
|
error ("Dwarf Error: bad offset (0x%lx) in compilation unit header (offset 0x%lx + 6).",
|
|
(long) cu_header.abbrev_offset,
|
|
(long) (beg_of_comp_unit - dwarf_info_buffer));
|
|
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).",
|
|
(long) cu_header.length,
|
|
(long) (beg_of_comp_unit - dwarf_info_buffer));
|
|
return;
|
|
}
|
|
/* Read the abbrevs for this compilation unit into a table */
|
|
dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset);
|
|
make_cleanup (dwarf2_empty_abbrev_table, NULL);
|
|
|
|
/* Read the compilation unit die */
|
|
info_ptr = read_partial_die (&comp_unit_die, abfd, info_ptr,
|
|
&comp_unit_has_pc_info, &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;
|
|
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_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;
|
|
int has_pc_info;
|
|
|
|
*lowpc = ((CORE_ADDR) -1);
|
|
*highpc = ((CORE_ADDR) 0);
|
|
|
|
while (nesting_level)
|
|
{
|
|
info_ptr = read_partial_die (&pdi, abfd, info_ptr,
|
|
&has_pc_info, cu_header);
|
|
|
|
if (pdi.name)
|
|
{
|
|
switch (pdi.tag)
|
|
{
|
|
case DW_TAG_subprogram:
|
|
if (has_pc_info)
|
|
{
|
|
if (pdi.lowpc < *lowpc)
|
|
{
|
|
*lowpc = pdi.lowpc;
|
|
}
|
|
if (pdi.highpc > *highpc)
|
|
{
|
|
*highpc = pdi.highpc;
|
|
}
|
|
if ((pdi.is_external || nesting_level == 1)
|
|
&& !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 == 1)
|
|
&& !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. */
|
|
if (nesting_level == 2)
|
|
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 == 1)
|
|
add_partial_symbol (&pdi, objfile, cu_header);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* If the die has a sibling, skip to the sibling.
|
|
Do not skip enumeration types, we want to record their
|
|
enumerators. */
|
|
if (pdi.sibling && pdi.tag != DW_TAG_enumeration_type)
|
|
{
|
|
info_ptr = pdi.sibling;
|
|
}
|
|
else if (pdi.has_children)
|
|
{
|
|
/* Die has children, but the optional DW_AT_sibling attribute
|
|
is missing. */
|
|
nesting_level++;
|
|
}
|
|
|
|
if (pdi.tag == 0)
|
|
{
|
|
nesting_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_NAMESPACE, 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_NAMESPACE, 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_NAMESPACE, 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_NAMESPACE, 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_NAMESPACE, 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_NAMESPACE, 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_NAMESPACE, 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_NAMESPACE, 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;
|
|
|
|
/* 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);
|
|
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.abbrev_offset);
|
|
make_cleanup (dwarf2_empty_abbrev_table, NULL);
|
|
|
|
dies = read_comp_unit (info_ptr, abfd, &cu_header);
|
|
|
|
make_cleanup_free_die_list (dies);
|
|
|
|
/* Do line number decoding in read_file_scope () */
|
|
process_die (dies, objfile, &cu_header);
|
|
|
|
if (!dwarf2_get_pc_bounds (dies, &lowpc, &highpc, objfile))
|
|
{
|
|
/* 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))
|
|
{
|
|
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;
|
|
sort_symtab_syms (pst->symtab);
|
|
|
|
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:
|
|
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;
|
|
default:
|
|
new_symbol (die, NULL, objfile, cu_header);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
read_file_scope (struct die_info *die, struct objfile *objfile,
|
|
const struct comp_unit_head *cu_header)
|
|
{
|
|
unsigned int line_offset = 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;
|
|
|
|
if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile))
|
|
{
|
|
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))
|
|
{
|
|
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");
|
|
|
|
/* Decode line number information if present. */
|
|
attr = dwarf_attr (die, DW_AT_stmt_list);
|
|
if (attr)
|
|
{
|
|
line_offset = DW_UNSND (attr);
|
|
dwarf_decode_lines (line_offset, comp_dir, abfd, cu_header);
|
|
}
|
|
|
|
/* 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);
|
|
}
|
|
}
|
|
}
|
|
|
|
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))
|
|
return;
|
|
|
|
lowpc += baseaddr;
|
|
highpc += baseaddr;
|
|
|
|
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 = decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
|
|
if (isderef)
|
|
complain (&dwarf2_unsupported_at_frame_base, name);
|
|
else if (isreg)
|
|
frame_base_reg = addr;
|
|
else if (offreg)
|
|
{
|
|
frame_base_reg = basereg;
|
|
frame_base_offset = addr;
|
|
}
|
|
else
|
|
complain (&dwarf2_unsupported_at_frame_base, name);
|
|
}
|
|
|
|
new = push_context (0, lowpc);
|
|
new->name = new_symbol (die, die->type, objfile, cu_header);
|
|
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);
|
|
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. */
|
|
if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile))
|
|
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. */
|
|
|
|
static int
|
|
dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, CORE_ADDR *highpc,
|
|
struct objfile *objfile)
|
|
{
|
|
struct attribute *attr;
|
|
CORE_ADDR low;
|
|
CORE_ADDR high;
|
|
|
|
attr = dwarf_attr (die, DW_AT_low_pc);
|
|
if (attr)
|
|
low = DW_ADDR (attr);
|
|
else
|
|
return 0;
|
|
attr = dwarf_attr (die, DW_AT_high_pc);
|
|
if (attr)
|
|
high = DW_ADDR (attr);
|
|
else
|
|
return 0;
|
|
|
|
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 (objfile->obfd) & HAS_RELOC) == 0)
|
|
return 0;
|
|
|
|
*lowpc = low;
|
|
*highpc = high;
|
|
return 1;
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
/* Get type of field. */
|
|
fp->type = die_type (die, objfile, cu_header);
|
|
|
|
/* 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_variable)
|
|
{
|
|
char *physname;
|
|
|
|
/* C++ static member.
|
|
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_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. */
|
|
{
|
|
complain (&dwarf2_unsupported_accessibility,
|
|
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);
|
|
struct type **arg_types;
|
|
int nparams = TYPE_NFIELDS (die->type);
|
|
int iparams;
|
|
|
|
/* Copy argument types from the subroutine type. */
|
|
arg_types = (struct type **)
|
|
TYPE_ALLOC (fnp->type, (nparams + 1) * sizeof (struct type *));
|
|
for (iparams = 0; iparams < nparams; iparams++)
|
|
arg_types[iparams] = TYPE_FIELD_TYPE (die->type, iparams);
|
|
|
|
/* Set last entry in argument type vector. */
|
|
if (TYPE_FLAGS (die->type) & TYPE_FLAG_VARARGS)
|
|
arg_types[nparams] = NULL;
|
|
else
|
|
arg_types[nparams] = dwarf2_fundamental_type (objfile, FT_VOID);
|
|
|
|
smash_to_method_type (fnp->type, type, return_type, arg_types);
|
|
|
|
/* 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
|
|
complain (&dwarf2_missing_member_fn_type_complaint, 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;
|
|
}
|
|
}
|
|
|
|
/* Get index in virtual function table if it is a virtual member function. */
|
|
attr = dwarf_attr (die, DW_AT_vtable_elem_location);
|
|
if (attr)
|
|
fnp->voffset = decode_locdesc (DW_BLOCK (attr), objfile, cu_header) + 2;
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
dwarf2_add_field (&fi, child_die, objfile, cu_header);
|
|
}
|
|
else if (child_die->tag == DW_TAG_variable)
|
|
{
|
|
/* C++ static member. */
|
|
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))
|
|
complain (&dwarf2_vtbl_not_found_complaint,
|
|
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;
|
|
}
|
|
|
|
die->type = type;
|
|
}
|
|
|
|
/* 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]) = SYMBOL_NAME (sym);
|
|
FIELD_TYPE (fields[num_fields]) = NULL;
|
|
FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym);
|
|
FIELD_BITSIZE (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)
|
|
{
|
|
low = DW_UNSND (attr);
|
|
}
|
|
else
|
|
{
|
|
complain (&dwarf2_non_const_array_bound_ignored,
|
|
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)
|
|
{
|
|
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
|
|
{
|
|
complain (&dwarf2_non_const_array_bound_ignored,
|
|
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]);
|
|
|
|
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)
|
|
{
|
|
base = decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
|
|
}
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 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;
|
|
|
|
if (die->type)
|
|
{
|
|
return;
|
|
}
|
|
|
|
type = lookup_pointer_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;
|
|
}
|
|
|
|
/* 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
|
|
{
|
|
length = 1;
|
|
}
|
|
index_type = dwarf2_fundamental_type (objfile, FT_INTEGER);
|
|
range_type = create_range_type (NULL, index_type, 1, length);
|
|
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 type *type;
|
|
|
|
if (!die->type)
|
|
{
|
|
struct attribute *attr;
|
|
struct type *xtype;
|
|
|
|
xtype = die_type (die, objfile, cu_header);
|
|
|
|
type = alloc_type (objfile);
|
|
TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
|
|
TYPE_FLAGS (type) |= TYPE_FLAG_TARGET_STUB;
|
|
TYPE_TARGET_TYPE (type) = xtype;
|
|
attr = dwarf_attr (die, DW_AT_name);
|
|
if (attr && DW_STRING (attr))
|
|
TYPE_NAME (type) = obsavestring (DW_STRING (attr),
|
|
strlen (DW_STRING (attr)),
|
|
&objfile->type_obstack);
|
|
|
|
die->type = type;
|
|
}
|
|
}
|
|
|
|
/* 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 is_unsigned = 0;
|
|
|
|
switch (encoding)
|
|
{
|
|
case DW_ATE_address:
|
|
/* Turn DW_ATE_address into a void * pointer. */
|
|
code = TYPE_CODE_PTR;
|
|
is_unsigned = 1;
|
|
break;
|
|
case DW_ATE_boolean:
|
|
code = TYPE_CODE_BOOL;
|
|
is_unsigned = 1;
|
|
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:
|
|
is_unsigned = 1;
|
|
break;
|
|
default:
|
|
complain (&dwarf2_unsupported_at_encoding,
|
|
dwarf_type_encoding_name (encoding));
|
|
break;
|
|
}
|
|
type = init_type (code, size, is_unsigned, DW_STRING (attr), objfile);
|
|
if (encoding == DW_ATE_address)
|
|
TYPE_TARGET_TYPE (type) = dwarf2_fundamental_type (objfile, FT_VOID);
|
|
}
|
|
else
|
|
{
|
|
type = dwarf_base_type (encoding, size, objfile);
|
|
}
|
|
die->type = type;
|
|
}
|
|
|
|
/* Read a whole compilation unit into a linked list of dies. */
|
|
|
|
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. */
|
|
|
|
static char *
|
|
dwarf2_read_section (struct objfile *objfile, file_ptr offset,
|
|
unsigned int size)
|
|
{
|
|
bfd *abfd = objfile->obfd;
|
|
char *buf;
|
|
|
|
if (size == 0)
|
|
return NULL;
|
|
|
|
buf = (char *) obstack_alloc (&objfile->psymbol_obstack, size);
|
|
if ((bfd_seek (abfd, offset, SEEK_SET) != 0) ||
|
|
(bfd_read (buf, size, 1, 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, unsigned int offset)
|
|
{
|
|
char *abbrev_ptr;
|
|
struct abbrev_info *cur_abbrev;
|
|
unsigned int abbrev_number, bytes_read, abbrev_name;
|
|
unsigned int abbrev_form, hash_number;
|
|
|
|
/* empty the table */
|
|
dwarf2_empty_abbrev_table (NULL);
|
|
|
|
abbrev_ptr = dwarf_abbrev_buffer + 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 = dwarf2_abbrevs[hash_number];
|
|
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) != NULL)
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Empty the abbrev table for a new compilation unit. */
|
|
|
|
/* ARGSUSED */
|
|
static void
|
|
dwarf2_empty_abbrev_table (PTR ignore)
|
|
{
|
|
int i;
|
|
struct abbrev_info *abbrev, *next;
|
|
|
|
for (i = 0; i < ABBREV_HASH_SIZE; ++i)
|
|
{
|
|
next = NULL;
|
|
abbrev = dwarf2_abbrevs[i];
|
|
while (abbrev)
|
|
{
|
|
next = abbrev->next;
|
|
xfree (abbrev->attrs);
|
|
xfree (abbrev);
|
|
abbrev = next;
|
|
}
|
|
dwarf2_abbrevs[i] = NULL;
|
|
}
|
|
}
|
|
|
|
/* Lookup an abbrev_info structure in the abbrev hash table. */
|
|
|
|
static struct abbrev_info *
|
|
dwarf2_lookup_abbrev (unsigned int number)
|
|
{
|
|
unsigned int hash_number;
|
|
struct abbrev_info *abbrev;
|
|
|
|
hash_number = number % ABBREV_HASH_SIZE;
|
|
abbrev = 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, int *has_pc_info,
|
|
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;
|
|
*has_pc_info = 0;
|
|
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);
|
|
if (!abbrev)
|
|
{
|
|
error ("Dwarf Error: Could not find abbrev number %d.", abbrev_number);
|
|
}
|
|
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:
|
|
part_die->locdesc = DW_BLOCK (&attr);
|
|
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)
|
|
complain (&dwarf2_absolute_sibling_complaint);
|
|
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, &dummy, 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)))
|
|
*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);
|
|
if (!abbrev)
|
|
{
|
|
error ("Dwarf Error: could not find abbrev number %d.", abbrev_number);
|
|
}
|
|
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 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)
|
|
{
|
|
unsigned int bytes_read;
|
|
struct dwarf_block *blk;
|
|
|
|
attr->name = abbrev->name;
|
|
attr->form = abbrev->form;
|
|
switch (abbrev->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_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_strp:
|
|
case DW_FORM_indirect:
|
|
default:
|
|
error ("Dwarf Error: Cannot handle %s in DWARF reader.",
|
|
dwarf_form_name (abbrev->form));
|
|
}
|
|
return info_ptr;
|
|
}
|
|
|
|
/* 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");
|
|
}
|
|
}
|
|
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");
|
|
}
|
|
}
|
|
|
|
*bytes_read = cu_header->addr_size;
|
|
return retval;
|
|
}
|
|
|
|
/* Reads the initial length from a section. The (draft) DWARF 2.1
|
|
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.
|
|
|
|
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
|
|
2.1, draft 4, dated July 20, 2000. This document was obtained
|
|
from:
|
|
|
|
http://reality.sgi.com/dehnert_engr/dwarf/dwarf2p1-draft4-000720.pdf
|
|
|
|
This document is only a draft and is subject to change. (So beware.)
|
|
|
|
- Kevin, Aug 4, 2000
|
|
] */
|
|
|
|
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
|
|
{
|
|
*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");
|
|
}
|
|
|
|
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. */
|
|
#if HOST_CHAR_BIT == 8
|
|
return buf;
|
|
#else
|
|
char *ret;
|
|
unsigned int i;
|
|
|
|
ret = obstack_alloc (&dwarf2_tmp_obstack, size);
|
|
for (i = 0; i < size; ++i)
|
|
{
|
|
ret[i] = bfd_get_8 (abfd, (bfd_byte *) buf);
|
|
buf++;
|
|
}
|
|
return ret;
|
|
#endif
|
|
}
|
|
|
|
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. */
|
|
#if HOST_CHAR_BIT == 8
|
|
if (*buf == '\0')
|
|
{
|
|
*bytes_read_ptr = 1;
|
|
return NULL;
|
|
}
|
|
*bytes_read_ptr = strlen (buf) + 1;
|
|
return buf;
|
|
#else
|
|
int byte;
|
|
unsigned int i = 0;
|
|
|
|
while ((byte = bfd_get_8 (abfd, (bfd_byte *) buf)) != 0)
|
|
{
|
|
obstack_1grow (&dwarf2_tmp_obstack, byte);
|
|
i++;
|
|
buf++;
|
|
}
|
|
if (i == 0)
|
|
{
|
|
*bytes_read_ptr = 1;
|
|
return NULL;
|
|
}
|
|
obstack_1grow (&dwarf2_tmp_obstack, '\0');
|
|
*bytes_read_ptr = i + 1;
|
|
return obstack_finish (&dwarf2_tmp_obstack);
|
|
#endif
|
|
}
|
|
|
|
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:
|
|
cu_language = language_fortran;
|
|
break;
|
|
case DW_LANG_Mips_Assembler:
|
|
cu_language = language_asm;
|
|
break;
|
|
case DW_LANG_Ada83:
|
|
case DW_LANG_Cobol74:
|
|
case DW_LANG_Cobol85:
|
|
case DW_LANG_Pascal83:
|
|
case DW_LANG_Modula2:
|
|
default:
|
|
cu_language = language_unknown;
|
|
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));
|
|
}
|
|
|
|
/* 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. */
|
|
|
|
struct filenames
|
|
{
|
|
unsigned int num_files;
|
|
struct fileinfo
|
|
{
|
|
char *name;
|
|
unsigned int dir;
|
|
unsigned int time;
|
|
unsigned int size;
|
|
}
|
|
*files;
|
|
};
|
|
|
|
struct directories
|
|
{
|
|
unsigned int num_dirs;
|
|
char **dirs;
|
|
};
|
|
|
|
static void
|
|
dwarf_decode_lines (unsigned int offset, char *comp_dir, bfd *abfd,
|
|
const struct comp_unit_head *cu_header)
|
|
{
|
|
char *line_ptr;
|
|
char *line_end;
|
|
struct line_head lh;
|
|
struct cleanup *back_to;
|
|
unsigned int i, bytes_read;
|
|
char *cur_file, *cur_dir;
|
|
unsigned char op_code, extended_op, adj_opcode;
|
|
|
|
#define FILE_ALLOC_CHUNK 5
|
|
#define DIR_ALLOC_CHUNK 5
|
|
|
|
struct filenames files;
|
|
struct directories dirs;
|
|
|
|
if (dwarf_line_buffer == NULL)
|
|
{
|
|
complain (&dwarf2_missing_line_number_section);
|
|
return;
|
|
}
|
|
|
|
files.num_files = 0;
|
|
files.files = NULL;
|
|
|
|
dirs.num_dirs = 0;
|
|
dirs.dirs = NULL;
|
|
|
|
line_ptr = dwarf_line_buffer + offset;
|
|
|
|
/* read in the prologue */
|
|
lh.total_length = read_initial_length (abfd, line_ptr, NULL, &bytes_read);
|
|
line_ptr += bytes_read;
|
|
line_end = line_ptr + lh.total_length;
|
|
lh.version = read_2_bytes (abfd, line_ptr);
|
|
line_ptr += 2;
|
|
lh.prologue_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));
|
|
back_to = make_cleanup (free_current_contents, &lh.standard_opcode_lengths);
|
|
|
|
lh.standard_opcode_lengths[0] = 1;
|
|
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;
|
|
if ((dirs.num_dirs % DIR_ALLOC_CHUNK) == 0)
|
|
{
|
|
dirs.dirs = (char **)
|
|
xrealloc (dirs.dirs,
|
|
(dirs.num_dirs + DIR_ALLOC_CHUNK) * sizeof (char *));
|
|
if (dirs.num_dirs == 0)
|
|
make_cleanup (free_current_contents, &dirs.dirs);
|
|
}
|
|
dirs.dirs[dirs.num_dirs++] = cur_dir;
|
|
}
|
|
line_ptr += bytes_read;
|
|
|
|
/* Read file name table */
|
|
while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
|
|
{
|
|
line_ptr += bytes_read;
|
|
if ((files.num_files % FILE_ALLOC_CHUNK) == 0)
|
|
{
|
|
files.files = (struct fileinfo *)
|
|
xrealloc (files.files,
|
|
(files.num_files + FILE_ALLOC_CHUNK)
|
|
* sizeof (struct fileinfo));
|
|
if (files.num_files == 0)
|
|
make_cleanup (free_current_contents, &files.files);
|
|
}
|
|
files.files[files.num_files].name = cur_file;
|
|
files.files[files.num_files].dir =
|
|
read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
|
|
line_ptr += bytes_read;
|
|
files.files[files.num_files].time =
|
|
read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
|
|
line_ptr += bytes_read;
|
|
files.files[files.num_files].size =
|
|
read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
|
|
line_ptr += bytes_read;
|
|
files.num_files++;
|
|
}
|
|
line_ptr += bytes_read;
|
|
|
|
/* 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 (files.num_files >= file)
|
|
{
|
|
/* The file and directory tables are 0 based, the references
|
|
are 1 based. */
|
|
dwarf2_start_subfile (files.files[file - 1].name,
|
|
(files.files[file - 1].dir
|
|
? dirs.dirs[files.files[file - 1].dir - 1]
|
|
: comp_dir));
|
|
}
|
|
|
|
/* Decode the table. */
|
|
while (!end_sequence)
|
|
{
|
|
op_code = read_1_byte (abfd, line_ptr);
|
|
line_ptr += 1;
|
|
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;
|
|
/* Don't call record_line here. The end_sequence
|
|
instruction provides the address of the first byte
|
|
*after* the last line in the sequence; it's not the
|
|
address of any real source line. However, the GDB
|
|
linetable structure only records the starts of lines,
|
|
not the ends. This is a weakness of GDB. */
|
|
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:
|
|
cur_file = read_string (abfd, line_ptr, &bytes_read);
|
|
line_ptr += bytes_read;
|
|
if ((files.num_files % FILE_ALLOC_CHUNK) == 0)
|
|
{
|
|
files.files = (struct fileinfo *)
|
|
xrealloc (files.files,
|
|
(files.num_files + FILE_ALLOC_CHUNK)
|
|
* sizeof (struct fileinfo));
|
|
if (files.num_files == 0)
|
|
make_cleanup (free_current_contents, &files.files);
|
|
}
|
|
files.files[files.num_files].name = cur_file;
|
|
files.files[files.num_files].dir =
|
|
read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
|
|
line_ptr += bytes_read;
|
|
files.files[files.num_files].time =
|
|
read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
|
|
line_ptr += bytes_read;
|
|
files.files[files.num_files].size =
|
|
read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
|
|
line_ptr += bytes_read;
|
|
files.num_files++;
|
|
break;
|
|
default:
|
|
complain (&dwarf2_mangled_line_number_section);
|
|
goto done;
|
|
}
|
|
break;
|
|
case DW_LNS_copy:
|
|
record_line (current_subfile, line, 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:
|
|
/* The file and directory tables are 0 based, the references
|
|
are 1 based. */
|
|
file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
|
|
line_ptr += bytes_read;
|
|
dwarf2_start_subfile
|
|
(files.files[file - 1].name,
|
|
(files.files[file - 1].dir
|
|
? dirs.dirs[files.files[file - 1].dir - 1]
|
|
: comp_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: /* 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, address);
|
|
basic_block = 1;
|
|
}
|
|
}
|
|
}
|
|
done:
|
|
do_cleanups (back_to);
|
|
}
|
|
|
|
/* 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 (*filename != '/' && dirname != NULL)
|
|
{
|
|
struct subfile *subfile;
|
|
char *fullname = concat (dirname, "/", filename, NULL);
|
|
|
|
for (subfile = subfiles; subfile; subfile = subfile->next)
|
|
{
|
|
if (STREQ (subfile->name, fullname))
|
|
{
|
|
current_subfile = subfile;
|
|
xfree (fullname);
|
|
return;
|
|
}
|
|
}
|
|
xfree (fullname);
|
|
}
|
|
start_subfile (filename, dirname);
|
|
}
|
|
|
|
/* 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;
|
|
|
|
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));
|
|
SYMBOL_NAME (sym) = obsavestring (name, strlen (name),
|
|
&objfile->symbol_obstack);
|
|
|
|
/* Default assumptions.
|
|
Use the passed type or decode it from the die. */
|
|
SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
|
|
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);
|
|
}
|
|
|
|
/* If this symbol is from a C++ compilation, then attempt to
|
|
cache the demangled form for future reference. This is a
|
|
typical time versus space tradeoff, that was decided in favor
|
|
of time because it sped up C++ symbol lookups by a factor of
|
|
about 20. */
|
|
|
|
SYMBOL_LANGUAGE (sym) = cu_language;
|
|
SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack);
|
|
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)
|
|
{
|
|
attr2 = dwarf_attr (die, DW_AT_external);
|
|
if (attr2 && (DW_UNSND (attr2) != 0))
|
|
{
|
|
SYMBOL_VALUE_ADDRESS (sym) =
|
|
decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
|
|
add_symbol_to_list (sym, &global_symbols);
|
|
|
|
/* In shared libraries the address of the variable
|
|
in the location descriptor might still be relocatable,
|
|
so its value could be zero.
|
|
Enter the symbol as a LOC_UNRESOLVED symbol, if its
|
|
value is zero, the address of the variable will then
|
|
be determined from the minimal symbol table whenever
|
|
the variable is referenced. */
|
|
if (SYMBOL_VALUE_ADDRESS (sym))
|
|
{
|
|
fixup_symbol_section (sym, objfile);
|
|
SYMBOL_VALUE_ADDRESS (sym) +=
|
|
ANOFFSET (objfile->section_offsets,
|
|
SYMBOL_SECTION (sym));
|
|
SYMBOL_CLASS (sym) = LOC_STATIC;
|
|
}
|
|
else
|
|
SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
|
|
}
|
|
else
|
|
{
|
|
SYMBOL_VALUE (sym) = addr =
|
|
decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
|
|
add_symbol_to_list (sym, list_in_scope);
|
|
if (optimized_out)
|
|
{
|
|
SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
|
|
}
|
|
else if (isreg)
|
|
{
|
|
SYMBOL_CLASS (sym) = LOC_REGISTER;
|
|
SYMBOL_VALUE (sym) =
|
|
DWARF2_REG_TO_REGNUM (SYMBOL_VALUE (sym));
|
|
}
|
|
else if (offreg)
|
|
{
|
|
SYMBOL_CLASS (sym) = LOC_BASEREG;
|
|
SYMBOL_BASEREG (sym) = DWARF2_REG_TO_REGNUM (basereg);
|
|
}
|
|
else if (islocal)
|
|
{
|
|
SYMBOL_CLASS (sym) = LOC_LOCAL;
|
|
}
|
|
else
|
|
{
|
|
fixup_symbol_section (sym, objfile);
|
|
SYMBOL_VALUE_ADDRESS (sym) =
|
|
addr + ANOFFSET (objfile->section_offsets,
|
|
SYMBOL_SECTION (sym));
|
|
SYMBOL_CLASS (sym) = LOC_STATIC;
|
|
}
|
|
}
|
|
}
|
|
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)
|
|
complain (&dwarf2_complex_location_expr);
|
|
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_NAMESPACE (sym) = STRUCT_NAMESPACE;
|
|
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_NAMESPACE (typedef_sym) = VAR_NAMESPACE;
|
|
if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
|
|
TYPE_NAME (SYMBOL_TYPE (sym)) =
|
|
obsavestring (SYMBOL_NAME (sym),
|
|
strlen (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_NAMESPACE (sym) = VAR_NAMESPACE;
|
|
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. */
|
|
complain (&dwarf2_unsupported_tag, 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)
|
|
complain (&dwarf2_const_value_length_mismatch, 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);
|
|
store_address (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)
|
|
complain (&dwarf2_const_value_length_mismatch, 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:
|
|
complain (&dwarf2_unsupported_const_value_attr,
|
|
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.", ref);
|
|
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.");
|
|
}
|
|
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.", ref);
|
|
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.");
|
|
}
|
|
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.");
|
|
}
|
|
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:
|
|
complain (&dwarf2_unexpected_tag, 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. */
|
|
|
|
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;
|
|
}
|
|
|
|
/* 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_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";
|
|
|
|
#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";
|
|
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";
|
|
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";
|
|
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";
|
|
/* SGI/MIPS specific */
|
|
case DW_CFA_MIPS_advance_loc8:
|
|
return "DW_CFA_MIPS_advance_loc8";
|
|
default:
|
|
return "DW_CFA_<unknown>";
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void
|
|
dump_die (struct die_info *die)
|
|
{
|
|
unsigned int i;
|
|
|
|
fprintf (stderr, "Die: %s (abbrev = %d, offset = %d)\n",
|
|
dwarf_tag_name (die->tag), die->abbrev, die->offset);
|
|
fprintf (stderr, "\thas children: %s\n",
|
|
dwarf_bool_name (die->has_children));
|
|
|
|
fprintf (stderr, "\tattributes:\n");
|
|
for (i = 0; i < die->num_attrs; ++i)
|
|
{
|
|
fprintf (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 (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 (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 (stderr, "constant: %ld", DW_UNSND (&die->attrs[i]));
|
|
break;
|
|
case DW_FORM_string:
|
|
fprintf (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 (stderr, "flag: TRUE");
|
|
else
|
|
fprintf (stderr, "flag: FALSE");
|
|
break;
|
|
case DW_FORM_strp: /* we do not support separate string
|
|
section yet */
|
|
case DW_FORM_indirect: /* we do not handle indirect yet */
|
|
default:
|
|
fprintf (stderr, "unsupported attribute form: %d.",
|
|
die->attrs[i].form);
|
|
}
|
|
fprintf (stderr, "\n");
|
|
}
|
|
}
|
|
|
|
void
|
|
dump_die_list (struct die_info *die)
|
|
{
|
|
while (die)
|
|
{
|
|
dump_die (die);
|
|
die = die->next;
|
|
}
|
|
}
|
|
|
|
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:
|
|
complain (&dwarf2_unsupported_die_ref_attr, dwarf_form_name (attr->form));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
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.",
|
|
typeid);
|
|
}
|
|
|
|
/* 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;
|
|
optimized_out = 1;
|
|
|
|
while (i < size)
|
|
{
|
|
optimized_out = 0;
|
|
op = data[i++];
|
|
switch (op)
|
|
{
|
|
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;
|
|
#if defined(HARRIS_TARGET) && defined(_M88K)
|
|
/* The Harris 88110 gdb ports have long kept their special reg
|
|
numbers between their gp-regs and their x-regs. This is
|
|
not how our dwarf is generated. Punt. */
|
|
unsnd += 6;
|
|
#endif
|
|
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
|
|
{
|
|
complain (&dwarf2_missing_at_frame_base);
|
|
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_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] - stack[stacki - 1];
|
|
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)
|
|
complain (&dwarf2_complex_location_expr);
|
|
break;
|
|
|
|
default:
|
|
complain (&dwarf2_unsupported_stack_op, dwarf_stack_op_name (op));
|
|
return (stack[stacki]);
|
|
}
|
|
}
|
|
return (stack[stacki]);
|
|
}
|
|
|
|
/* memory allocation interface */
|
|
|
|
/* ARGSUSED */
|
|
static void
|
|
dwarf2_free_tmp_obstack (PTR 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);
|
|
}
|