--- /dev/null
+/* DWARF 2 debugging format support for GDB.
+ Copyright 1994, 1995, 1996 Free Software Foundation, Inc.
+
+ Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
+ Inc. with support from Florida State University (under contract
+ with the Ada Joint Program Office), and Silicon Graphics, Inc.
+ Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
+ based on Fred Fish's (Cygnus Support) implementation of DWARF 1
+ support in dwarfread.c
+
+This file is part of GDB.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or (at
+your option) any later version.
+
+This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include "defs.h"
+#include "bfd.h"
+#include "symtab.h"
+#include "gdbtypes.h"
+#include "symfile.h"
+#include "objfiles.h"
+#include "elf/dwarf2.h"
+#include "buildsym.h"
+#include "demangle.h"
+#include "expression.h"
+#include "language.h"
+
+#include <fcntl.h>
+#include <string.h>
+#include <sys/types.h>
+
+#ifndef NO_SYS_FILE
+#include <sys/file.h>
+#endif
+
+/* .debug_info header for a compilation unit
+ Because of alignment constraints, this structure has padding and cannot
+ be mapped directly onto the beginning of the .debug_info section. */
+typedef struct comp_unit_header
+ {
+ unsigned int length; /* length of the .debug_info
+ contribution */
+ unsigned short version; /* version number -- 2 for DWARF
+ version 2 */
+ unsigned int abbrev_offset; /* offset into .debug_abbrev section */
+ unsigned char addr_size; /* byte size of an address -- 4 */
+ }
+_COMP_UNIT_HEADER;
+#define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
+
+/* .debug_pubnames header
+ Because of alignment constraints, this structure has padding and cannot
+ be mapped directly onto the beginning of the .debug_info section. */
+typedef struct pubnames_header
+ {
+ unsigned int length; /* length of the .debug_pubnames
+ contribution */
+ unsigned char version; /* version number -- 2 for DWARF
+ version 2 */
+ unsigned int info_offset; /* offset into .debug_info section */
+ unsigned int info_size; /* byte size of .debug_info section
+ portion */
+ }
+_PUBNAMES_HEADER;
+#define _ACTUAL_PUBNAMES_HEADER_SIZE 13
+
+/* .debug_pubnames header
+ Because of alignment constraints, this structure has padding and cannot
+ be mapped directly onto the beginning of the .debug_info section. */
+typedef struct aranges_header
+ {
+ unsigned int length; /* byte len of the .debug_aranges
+ contribution */
+ unsigned short version; /* version number -- 2 for DWARF
+ version 2 */
+ unsigned int info_offset; /* offset into .debug_info section */
+ unsigned char addr_size; /* byte size of an address */
+ unsigned char seg_size; /* byte size of segment descriptor */
+ }
+_ARANGES_HEADER;
+#define _ACTUAL_ARANGES_HEADER_SIZE 12
+
+/* .debug_line statement program prologue
+ Because of alignment constraints, this structure has padding and cannot
+ be mapped directly onto the beginning of the .debug_info section. */
+typedef struct statement_prologue
+ {
+ unsigned int total_length; /* byte length of the statement
+ information */
+ unsigned short version; /* version number -- 2 for DWARF
+ version 2 */
+ unsigned int prologue_length; /* # bytes between prologue &
+ stmt program */
+ unsigned char minimum_instruction_length; /* byte size of
+ smallest instr */
+ unsigned char default_is_stmt; /* initial value of is_stmt
+ register */
+ char line_base;
+ unsigned char line_range;
+ unsigned char opcode_base; /* number assigned to first special
+ opcode */
+ unsigned char *standard_opcode_lengths;
+ }
+_STATEMENT_PROLOGUE;
+
+/* offsets and sizes of debugging sections */
+
+static file_ptr dwarf_info_offset;
+static file_ptr dwarf_abbrev_offset;
+static file_ptr dwarf_line_offset;
+static file_ptr dwarf_pubnames_offset;
+static file_ptr dwarf_aranges_offset;
+static file_ptr dwarf_loc_offset;
+static file_ptr dwarf_macinfo_offset;
+static file_ptr dwarf_str_offset;
+
+static unsigned int dwarf_info_size;
+static unsigned int dwarf_abbrev_size;
+static unsigned int dwarf_line_size;
+static unsigned int dwarf_pubnames_size;
+static unsigned int dwarf_aranges_size;
+static unsigned int dwarf_loc_size;
+static unsigned int dwarf_macinfo_size;
+static unsigned int dwarf_str_size;
+
+/* names of the debugging sections */
+
+#define INFO_SECTION ".debug_info"
+#define ABBREV_SECTION ".debug_abbrev"
+#define LINE_SECTION ".debug_line"
+#define PUBNAMES_SECTION ".debug_pubnames"
+#define ARANGES_SECTION ".debug_aranges"
+#define LOC_SECTION ".debug_loc"
+#define MACINFO_SECTION ".debug_macinfo"
+#define STR_SECTION ".debug_str"
+
+/* Get at parts of an attribute structure */
+
+#define DW_STRING(attr) ((attr)->u.str)
+#define DW_UNSND(attr) ((attr)->u.unsnd)
+#define DW_BLOCK(attr) ((attr)->u.blk)
+#define DW_SND(attr) ((attr)->u.snd)
+#define DW_ADDR(attr) ((attr)->u.addr)
+
+/* local data types */
+
+/* The data in a compilation unit header looks like this. */
+struct comp_unit_head
+ {
+ int length;
+ short version;
+ int abbrev_offset;
+ unsigned char addr_size;
+ };
+
+/* The data in the .debug_line statement prologue looks like this. */
+struct line_head
+ {
+ unsigned int total_length;
+ unsigned short version;
+ unsigned int prologue_length;
+ unsigned char minimum_instruction_length;
+ unsigned char default_is_stmt;
+ char line_base;
+ unsigned char line_range;
+ unsigned char opcode_base;
+ unsigned char *standard_opcode_lengths;
+ };
+
+/* When we construct a partial symbol table entry we only
+ need this much information. */
+struct partial_die_info
+ {
+ unsigned short tag;
+ unsigned char has_children;
+ unsigned char is_external;
+ unsigned int offset;
+ unsigned int abbrev;
+ char *name;
+ CORE_ADDR lowpc;
+ CORE_ADDR highpc;
+ struct dwarf_block *locdesc;
+ unsigned int language;
+ int value;
+ };
+
+/* This data structure holds the information of an abbrev. */
+struct abbrev_info
+ {
+ unsigned int number; /* number identifying abbrev */
+ unsigned int tag; /* dwarf tag */
+ int has_children; /* boolean */
+ unsigned int num_attrs; /* number of attributes */
+ struct attr_abbrev *attrs; /* an array of attribute descriptions */
+ struct abbrev_info *next; /* next in chain */
+ };
+
+struct attr_abbrev
+ {
+ unsigned int name;
+ unsigned int form;
+ };
+
+/* This data structure holds a complete die structure. */
+struct die_info
+ {
+ unsigned short tag; /* Tag indicating type of die */
+ unsigned short has_children; /* Does the die have children */
+ unsigned int abbrev; /* Abbrev number */
+ unsigned int offset; /* Offset in .debug_info section */
+ unsigned int num_attrs; /* Number of attributes */
+ struct attribute *attrs; /* An array of attributes */
+ struct die_info *next_ref; /* Next die in ref hash table */
+ struct die_info *next; /* Next die in linked list */
+ struct type *type; /* Cached type information */
+ };
+
+/* Attributes have a name and a value */
+struct attribute
+ {
+ unsigned short name;
+ unsigned short form;
+ union
+ {
+ char *str;
+ struct dwarf_block *blk;
+ unsigned int unsnd;
+ int snd;
+ CORE_ADDR addr;
+ }
+ u;
+ };
+
+/* Blocks are a bunch of untyped bytes. */
+struct dwarf_block
+ {
+ unsigned int size;
+ char *data;
+ };
+
+/* We only hold one compilation unit's abbrevs in
+ memory at any one time. */
+#ifndef ABBREV_HASH_SIZE
+#define ABBREV_HASH_SIZE 121
+#endif
+#ifndef ATTR_ALLOC_CHUNK
+#define ATTR_ALLOC_CHUNK 4
+#endif
+
+/* FIXME: do away with this */
+
+#ifndef DWARF2_MAX_STRING_SIZE
+#define DWARF2_MAX_STRING_SIZE 1024
+#endif
+
+static struct abbrev_info *dwarf2_abbrevs[ABBREV_HASH_SIZE];
+
+/* A hash table of die offsets for following references. */
+#ifndef REF_HASH_SIZE
+#define REF_HASH_SIZE 1021
+#endif
+
+static struct die_info *die_ref_table[REF_HASH_SIZE];
+
+/* Allocate fields for structs, unions and enums in this size. */
+#ifndef DW_FIELD_ALLOC_CHUNK
+#define DW_FIELD_ALLOC_CHUNK 4
+#endif
+
+/* The language we are debugging. */
+static enum language cu_language;
+static const struct language_defn *cu_language_defn;
+
+/* Actually data from the sections. */
+static char *dwarf_info_buffer;
+static char *dwarf_abbrev_buffer;
+static char *dwarf_line_buffer;
+
+/* A zeroed version of several structures for initialization purposes. */
+static struct partial_die_info zeroed_partial_die;
+static struct die_info zeroed_die;
+
+/* The generic symbol table building routines have separate lists for
+ file scope symbols and all all other scopes (local scopes). So
+ we need to select the right one to pass to add_symbol_to_list().
+ We do it by keeping a pointer to the correct list in list_in_scope.
+
+ FIXME: The original dwarf code just treated the file scope as the first
+ local scope, and all other local scopes as nested local scopes, and worked
+ fine. Check to see if we really need to distinguish these
+ in buildsym.c. */
+static struct pending **list_in_scope = &file_symbols;
+static int isreg; /* Kludge to identify register
+ variables */
+static int offreg; /* Kludge to identify basereg
+ references */
+
+/* This value is added to each symbol value. FIXME: Generalize to
+ the section_offsets structure used by dbxread (once this is done,
+ pass the appropriate section number to end_symtab). */
+static CORE_ADDR baseaddr; /* Add to each symbol value */
+
+/* Maintain an array of referenced fundamental types for the current
+ compilation unit being read. For DWARF version 1, we have to construct
+ the fundamental types on the fly, since no information about the
+ fundamental types is supplied. Each such fundamental type is created by
+ calling a language dependent routine to create the type, and then a
+ pointer to that type is then placed in the array at the index specified
+ by it's FT_<TYPENAME> value. The array has a fixed size set by the
+ FT_NUM_MEMBERS compile time constant, which is the number of predefined
+ fundamental types gdb knows how to construct. */
+static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */
+
+/* FIXME - set from bfd function */
+static int bits_per_byte = 8;
+
+/* Keep track of whether we have given a warning about not
+ handling DW_TAG_const_type dies. */
+static int tag_const_warning_given = 0;
+
+/* Keep track of whether we have given a warning about not
+ handling DW_TAG_volatile_type dies. */
+static int tag_volatile_warning_given = 0;
+
+/* Keep track of constant array bound warning. */
+static int array_bound_warning_given = 0;
+
+/* Remember the addr_size read from the dwarf.
+ If a target expects to link compilation units with differing address
+ sizes, gdb needs to be sure that the appropriate size is here for
+ whatever scope is currently getting read. */
+static int address_size;
+
+/* Externals references. */
+extern int info_verbose; /* From main.c; nonzero => verbose */
+
+/* local function prototypes */
+
+static void dwarf2_locate_sections PARAMS ((bfd *, asection *, PTR));
+
+static void dwarf2_build_psymtabs_easy PARAMS ((struct objfile *,
+ struct section_offsets *,
+ int));
+static void dwarf2_build_psymtabs_hard PARAMS ((struct objfile *,
+ struct section_offsets *,
+ int));
+
+static char *scan_partial_symbols PARAMS ((char *, struct objfile *,
+ CORE_ADDR *, CORE_ADDR *));
+
+static void add_partial_symbol PARAMS ((struct partial_die_info *,
+ struct objfile *));
+
+static void dwarf2_psymtab_to_symtab PARAMS ((struct partial_symtab *));
+
+static void psymtab_to_symtab_1 PARAMS ((struct partial_symtab *));
+
+static void add_die_to_symtab PARAMS ((struct die_info *, struct objfile *));
+
+static char *dwarf2_read_section PARAMS ((bfd *, file_ptr, unsigned int));
+
+static void dwarf2_read_abbrevs PARAMS ((bfd *, unsigned int));
+
+static void dwarf2_empty_abbrev_table PARAMS ((void));
+
+static struct abbrev_info *dwarf2_lookup_abbrev PARAMS ((unsigned int));
+
+static char *read_partial_die PARAMS ((struct partial_die_info *,
+ bfd *, char *, int *));
+
+static char *read_full_die PARAMS ((struct die_info **, bfd *, char *));
+
+static unsigned int read_1_byte PARAMS ((bfd *, char *));
+
+static unsigned int read_2_bytes PARAMS ((bfd *, char *));
+
+static unsigned int read_4_bytes PARAMS ((bfd *, char *));
+
+static unsigned int read_8_bytes PARAMS ((bfd *, char *));
+
+static CORE_ADDR read_address PARAMS ((bfd *, char *));
+
+static char *read_n_bytes PARAMS ((bfd *, char *, unsigned int));
+
+static char *read_string PARAMS ((bfd *, char *, unsigned int *));
+
+static unsigned int read_unsigned_leb128 PARAMS ((bfd *, char *,
+ unsigned int *));
+
+static int read_signed_leb128 PARAMS ((bfd *, char *, unsigned int *));
+
+static void set_cu_language PARAMS ((unsigned int));
+
+static void record_minimal_symbol PARAMS ((char *, CORE_ADDR,
+ enum minimal_symbol_type,
+ struct objfile *));
+
+static int convert_locdesc PARAMS ((struct dwarf_block *));
+
+static struct attribute *dwarf_attr PARAMS ((struct die_info *,
+ unsigned int));
+
+static void dwarf_decode_lines PARAMS ((unsigned int, bfd *));
+
+static struct symbol *new_symbol PARAMS ((struct die_info * die, struct objfile * objfile));
+
+static struct type *die_type PARAMS ((struct die_info * die, struct objfile * objfile));
+
+static struct type *type_at_offset PARAMS ((unsigned int offset, struct objfile * objfile));
+
+static struct type *tag_type_to_type PARAMS ((struct die_info * die, struct objfile * objfile));
+
+static void read_type_die PARAMS ((struct die_info * die, struct objfile * objfile));
+
+static void read_typedef PARAMS ((struct die_info * die, struct objfile * objfile));
+
+static void read_base_type PARAMS ((struct die_info * die, struct objfile * objfile));
+
+static void read_file_scope PARAMS ((struct die_info * die, struct objfile * objfile));
+
+static void read_func_scope PARAMS ((struct die_info * die, struct objfile * objfile));
+
+static void read_lexical_block_scope PARAMS ((struct die_info * die,
+ struct objfile * objfile));
+
+static void read_structure_scope PARAMS ((struct die_info * die, struct objfile * objfile));
+
+static void read_common_block PARAMS ((struct die_info * die, struct objfile * objfile));
+
+static void read_enumeration PARAMS ((struct die_info * die, struct objfile * objfile));
+
+static struct type * dwarf_base_type PARAMS ((int encoding, int size));
+
+static CORE_ADDR decode_locdesc PARAMS ((struct dwarf_block *,
+ struct objfile *));
+
+static char *create_name PARAMS ((char *, struct obstack *));
+
+static void dwarf_read_array_type PARAMS ((struct die_info * die,
+ struct objfile * objfile));
+
+static void read_tag_pointer_type PARAMS ((struct die_info * die,
+ struct objfile * objfile));
+
+static void read_tag_const_type PARAMS ((struct die_info * die,
+ struct objfile * objfile));
+
+static void read_tag_volatile_type PARAMS ((struct die_info * die,
+ struct objfile * objfile));
+
+static void read_tag_string_type PARAMS ((struct die_info * die,
+ struct objfile * objfile));
+
+static void read_subroutine_type PARAMS ((struct die_info * die,
+ struct objfile * objfile));
+
+struct die_info *read_comp_unit PARAMS ((char *info_ptr, bfd * abfd));
+
+static void free_die_list PARAMS ((struct die_info * dies));
+
+static void process_die PARAMS ((struct die_info *, struct objfile *));
+
+static char *dwarf_tag_name PARAMS ((unsigned tag));
+
+static char *dwarf_attr_name PARAMS ((unsigned attr));
+
+static char *dwarf_form_name PARAMS ((unsigned form));
+
+static char *dwarf_stack_op_name PARAMS ((unsigned op));
+
+static char *dwarf_bool_name PARAMS ((unsigned bool));
+
+static char *dwarf_bool_name PARAMS ((unsigned tag));
+
+static char *dwarf_type_encoding_name PARAMS ((unsigned enc));
+
+static char *dwarf_cfi_name PARAMS ((unsigned cfi_opc));
+
+struct die_info *copy_die PARAMS ((struct die_info *old_die));
+
+struct die_info *sibling_die PARAMS ((struct die_info *die));
+
+void dump_die PARAMS ((struct die_info *die));
+
+void dump_die_list PARAMS ((struct die_info *dies));
+
+void store_in_ref_table PARAMS ((unsigned int, struct die_info *));
+
+struct die_info *follow_die_ref PARAMS ((unsigned int offset));
+
+static struct type *dwarf2_fundamental_type PARAMS ((struct objfile *, int));
+
+/* memory allocation interface */
+
+static struct type *dwarf_alloc_type PARAMS ((struct objfile *));
+
+static struct abbrev_info *dwarf_alloc_abbrev PARAMS ((void));
+
+static struct dwarf_block *dwarf_alloc_block PARAMS ((void));
+
+static struct die_info *dwarf_alloc_die PARAMS ((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 (abfd)
+ 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 && dwarf_line_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 (ignore_abfd, sectp, ignore_ptr)
+ 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 (objfile, section_offsets, mainline)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ int mainline;
+{
+ bfd *abfd = objfile->obfd;
+
+ /* We definitely need the .debug_info, .debug_abbrev, and .debug_line
+ sections */
+
+ dwarf_info_buffer = dwarf2_read_section (abfd,
+ dwarf_info_offset,
+ dwarf_info_size);
+ dwarf_abbrev_buffer = dwarf2_read_section (abfd,
+ dwarf_abbrev_offset,
+ dwarf_abbrev_size);
+ dwarf_line_buffer = dwarf2_read_section (abfd,
+ 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 significanlty easier if we have .debug_aranges and
+ .debug_pubnames sections */
+
+ dwarf2_build_psymtabs_easy (objfile, section_offsets, mainline);
+ }
+ else
+#endif
+ /* only test this case for now */
+ {
+ /* In this case we have to work a bit harder */
+ dwarf2_build_psymtabs_hard (objfile, section_offsets, mainline);
+ }
+}
+
+/* Build the partial symbol table from the information in the
+ .debug_pubnames and .debug_aranges sections. */
+
+static void
+dwarf2_build_psymtabs_easy (objfile, section_offsets, mainline)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ 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 (abfd,
+ dwarf_pubnames_offset,
+ dwarf_pubnames_size);
+ pubnames_ptr = pubnames_buffer;
+ while ((pubnames_ptr - pubnames_buffer) < dwarf_pubnames_size)
+ {
+ entry_length = read_4_bytes (abfd, pubnames_ptr);
+ pubnames_ptr += 4;
+ 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 (abfd,
+ dwarf_aranges_offset,
+ dwarf_aranges_size);
+
+}
+
+/* Build the partial symbol table by doing a quick pass through the
+ .debug_info and .debug_abbrev sections. */
+
+static void
+dwarf2_build_psymtabs_hard (objfile, section_offsets, mainline)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ 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, *comp_unit_die_offset;
+ struct comp_unit_head cu_header;
+ struct partial_die_info comp_unit_die;
+ struct partial_symtab *pst;
+ struct cleanup *back_to;
+ int comp_unit_has_pc_info;
+ int has_pc_info;
+ CORE_ADDR lowpc, highpc;
+
+ comp_unit_die = zeroed_partial_die;
+ info_ptr = dwarf_info_buffer;
+ abbrev_ptr = dwarf_abbrev_buffer;
+
+ while ((info_ptr - dwarf_info_buffer)
+ + ((info_ptr - dwarf_info_buffer) % 4) < dwarf_info_size)
+ {
+ beg_of_comp_unit = info_ptr;
+ cu_header.length = read_4_bytes (abfd, info_ptr);
+ info_ptr += 4;
+ cu_header.version = read_2_bytes (abfd, info_ptr);
+ info_ptr += 2;
+ cu_header.abbrev_offset = read_4_bytes (abfd, info_ptr);
+ info_ptr += 4;
+ cu_header.addr_size = read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+ address_size = cu_header.addr_size;
+
+ if (cu_header.version != 2)
+ {
+ error ("Dwarf Error: wrong version in compilation unit header.");
+ return;
+ }
+
+ /* Read the abbrevs for this compilation unit into a table */
+ dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset);
+ back_to = 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);
+
+ /* 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, section_offsets,
+ comp_unit_die.name,
+ comp_unit_die.lowpc,
+ objfile->global_psymbols.next,
+ objfile->static_psymbols.next);
+
+ /* Store offset in the .debug_info section of the comp_unit_die. */
+ pst->read_symtab_private = (char *)
+ (beg_of_comp_unit - dwarf_info_buffer);
+
+ /* Store the function that reads in the rest of the symbol table */
+ pst->read_symtab = dwarf2_psymtab_to_symtab;
+
+ /* Read the rest of the partial symbols from this comp unit */
+ info_ptr = scan_partial_symbols (info_ptr, objfile, &lowpc, &highpc);
+
+ /* 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;
+ pst->texthigh = comp_unit_die.highpc;
+
+ 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 + 4;
+ }
+ do_cleanups (back_to);
+}
+
+/* Read in all interesting dies to the end of the compilation unit. */
+
+static char *
+scan_partial_symbols (info_ptr, objfile, lowpc, highpc)
+ char *info_ptr;
+ struct objfile *objfile;
+ CORE_ADDR *lowpc;
+ CORE_ADDR *highpc;
+{
+ /* FIXME: This should free the attributes of the partial die structure
+ when it is done with them (is there a more efficient way
+ to do this). */
+ bfd *abfd = objfile->obfd;
+ struct partial_die_info pdi;
+ int nesting_level = 1; /* we've already read in comp_unit_die */
+ int has_pc_info;
+
+ pdi = zeroed_partial_die;
+ *lowpc = ((CORE_ADDR) -1);
+ *highpc = ((CORE_ADDR) 0);
+ do
+ {
+ info_ptr = read_partial_die (&pdi, abfd, info_ptr, &has_pc_info);
+ switch (pdi.tag)
+ {
+ case DW_TAG_subprogram:
+ case DW_TAG_variable:
+ case DW_TAG_typedef:
+ case DW_TAG_class_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_union_type:
+ if (pdi.is_external || nesting_level == 1)
+ {
+ if (pdi.name)
+ {
+ add_partial_symbol (&pdi, objfile);
+ }
+ }
+ if (has_pc_info)
+ {
+ if (pdi.lowpc < *lowpc)
+ {
+ *lowpc = pdi.lowpc;
+ }
+ if (pdi.highpc > *lowpc)
+ {
+ *highpc = pdi.highpc;
+ }
+ }
+ }
+ if (pdi.has_children)
+ {
+ nesting_level++;
+ }
+ if (pdi.tag == 0)
+ {
+ nesting_level--;
+ }
+ }
+ while (nesting_level);
+ return info_ptr;
+}
+
+static void
+add_partial_symbol (pdi, objfile)
+ struct partial_die_info *pdi;
+ struct objfile *objfile;
+{
+ switch (pdi->tag)
+ {
+ case DW_TAG_subprogram:
+ if (pdi->is_external)
+ {
+ record_minimal_symbol (pdi->name, pdi->lowpc,
+ mst_text, objfile);
+ add_psymbol_to_list (pdi->name, strlen (pdi->name),
+ VAR_NAMESPACE, LOC_BLOCK,
+ &objfile->global_psymbols,
+ 0, pdi->lowpc, cu_language, objfile);
+ }
+ else
+ {
+ add_psymbol_to_list (pdi->name, strlen (pdi->name),
+ VAR_NAMESPACE, LOC_BLOCK,
+ &objfile->static_psymbols,
+ 0, pdi->lowpc, cu_language, objfile);
+ }
+ break;
+ case DW_TAG_variable:
+ if (pdi->is_external)
+ {
+ record_minimal_symbol (pdi->name, convert_locdesc (pdi->locdesc),
+ mst_data, objfile);
+ add_psymbol_to_list (pdi->name, strlen (pdi->name),
+ VAR_NAMESPACE, LOC_STATIC,
+ &objfile->global_psymbols,
+ 0, 0, cu_language, objfile);
+ }
+ else
+ {
+ add_psymbol_to_list (pdi->name, strlen (pdi->name),
+ VAR_NAMESPACE, LOC_STATIC,
+ &objfile->static_psymbols,
+ 0, 0, cu_language, objfile);
+ }
+ break;
+ case DW_TAG_typedef:
+ add_psymbol_to_list (pdi->name, strlen (pdi->name),
+ VAR_NAMESPACE, LOC_TYPEDEF,
+ &objfile->static_psymbols,
+ 0, 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:
+ add_psymbol_to_list (pdi->name, strlen (pdi->name),
+ STRUCT_NAMESPACE, LOC_TYPEDEF,
+ &objfile->static_psymbols,
+ 0, 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, 0, cu_language, objfile);
+ }
+ break;
+ }
+}
+
+/* Expand this partial symbol table into a full symbol table. */
+
+static void
+dwarf2_psymtab_to_symtab (pst)
+ 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
+ {
+ psymtab_to_symtab_1 (pst);
+ }
+ }
+}
+
+static void
+psymtab_to_symtab_1 (pst)
+ struct partial_symtab *pst;
+{
+ struct objfile *objfile = pst->objfile;
+ bfd *abfd = objfile->obfd;
+ struct comp_unit_head cu_header;
+ struct die_info *dies;
+ struct attribute *attr;
+ unsigned long offset;
+ unsigned long int nesting_level;
+ CORE_ADDR highpc;
+ struct attribute *high_pc_attr;
+ struct die_info *child_die;
+ char *info_ptr;
+ struct context_stack *context;
+ struct symtab *symtab;
+ struct cleanup *abbrev_cleanup, *die_cleanup;
+
+ /* Get the offset of this compilation units debug info */
+ offset = (unsigned long) pst->read_symtab_private;
+ info_ptr = dwarf_info_buffer + offset;
+
+ /* read in the comp_unit header */
+ cu_header.length = read_4_bytes (abfd, info_ptr);
+ info_ptr += 4;
+ cu_header.version = read_2_bytes (abfd, info_ptr);
+ info_ptr += 2;
+ cu_header.abbrev_offset = read_4_bytes (abfd, info_ptr);
+ info_ptr += 4;
+ cu_header.addr_size = read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+
+ /* Read the abbrevs for this compilation unit */
+ dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset);
+ abbrev_cleanup = make_cleanup (dwarf2_empty_abbrev_table, NULL);
+
+ dies = read_comp_unit (info_ptr, abfd);
+
+ die_cleanup = make_cleanup (free_die_list, dies);
+
+ /* Do line number decoding in read_file_scope () */
+ process_die (dies, objfile);
+
+ attr = dwarf_attr (dies, DW_AT_high_pc);
+ if (attr)
+ {
+ highpc = DW_ADDR (attr);
+ }
+ else
+ {
+ /* 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)
+ {
+ high_pc_attr = dwarf_attr (child_die, DW_AT_high_pc);
+ if (high_pc_attr)
+ {
+ highpc = max (highpc, DW_ADDR (high_pc_attr));
+ }
+ }
+ child_die = sibling_die (child_die);
+ }
+ }
+ }
+
+ symtab = end_symtab (highpc, objfile, 0);
+ if (symtab != NULL)
+ {
+ symtab->language = cu_language;
+ }
+ pst->symtab = symtab;
+ pst->readin = 1;
+ if (info_verbose)
+ {
+ printf_filtered ("Sorting symbol table...");
+ wrap_here ("");
+ fflush (stdout);
+ }
+ sort_symtab_syms (pst->symtab);
+ do_cleanups (abbrev_cleanup);
+}
+
+/* Process a die and its children. */
+
+static void
+process_die (die, objfile)
+ struct die_info *die;
+ struct objfile *objfile;
+{
+ switch (die->tag)
+ {
+ case DW_TAG_padding:
+ break;
+ case DW_TAG_compile_unit:
+ read_file_scope (die, objfile);
+ break;
+ case DW_TAG_subprogram:
+ if (dwarf_attr (die, DW_AT_low_pc))
+ {
+ read_func_scope (die, objfile);
+ }
+ break;
+ case DW_TAG_lexical_block:
+ read_lexical_block_scope (die, objfile);
+ break;
+ case DW_TAG_class_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_union_type:
+ read_structure_scope (die, objfile);
+ break;
+ case DW_TAG_enumeration_type:
+ read_enumeration (die, objfile);
+ break;
+ case DW_TAG_subroutine_type:
+ read_subroutine_type (die, objfile);
+ break;
+ case DW_TAG_array_type:
+ dwarf_read_array_type (die, objfile);
+ break;
+ case DW_TAG_pointer_type:
+ read_tag_pointer_type (die, objfile);
+ break;
+ case DW_TAG_string_type:
+ read_tag_string_type (die, objfile);
+ break;
+ case DW_TAG_base_type:
+ read_base_type (die, objfile);
+ break;
+ case DW_TAG_common_block:
+ read_common_block (die, objfile);
+ break;
+ case DW_TAG_common_inclusion:
+ break;
+ default:
+ new_symbol (die, objfile);
+ break;
+ }
+}
+
+static void
+read_file_scope (die, objfile)
+ struct die_info *die;
+ struct objfile *objfile;
+{
+ unsigned int line_offset = 0;
+ CORE_ADDR lowpc = ((CORE_ADDR) -1);
+ CORE_ADDR highpc = ((CORE_ADDR) 0);
+ struct attribute *attr, *low_pc_attr, *high_pc_attr;
+ char *name = NULL;
+ char *comp_dir = NULL;
+ struct die_info *child_die;
+ bfd *abfd = objfile->obfd;
+
+ low_pc_attr = dwarf_attr (die, DW_AT_low_pc);
+ if (low_pc_attr)
+ {
+ lowpc = DW_ADDR (low_pc_attr);
+ }
+ high_pc_attr = dwarf_attr (die, DW_AT_high_pc);
+ if (high_pc_attr)
+ {
+ highpc = DW_ADDR (high_pc_attr);
+ }
+ if (!low_pc_attr || !high_pc_attr)
+ {
+ if (die->has_children)
+ {
+ child_die = die->next;
+ while (child_die && child_die->tag)
+ {
+ if (child_die->tag == DW_TAG_subprogram)
+ {
+ low_pc_attr = dwarf_attr (child_die, DW_AT_low_pc);
+ if (low_pc_attr)
+ {
+ lowpc = min (lowpc, DW_ADDR (low_pc_attr));
+ }
+ high_pc_attr = dwarf_attr (child_die, DW_AT_high_pc);
+ if (high_pc_attr)
+ {
+ highpc = max (highpc, DW_ADDR (high_pc_attr));
+ }
+ }
+ child_die = sibling_die (child_die);
+ }
+ }
+ }
+
+ 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 (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));
+ }
+
+#if 0
+ /* FIXME:Do something here. */
+ if (dip->at_producer != NULL)
+ {
+ handle_producer (dip->at_producer);
+ }
+#endif
+
+ start_symtab (name, comp_dir, lowpc);
+
+ /* Decode line number information. */
+ attr = dwarf_attr (die, DW_AT_stmt_list);
+ if (!attr)
+ {
+ error (
+ "Dwarf Error: No line number information for compilation unit: %s.",
+ name);
+ }
+ line_offset = DW_UNSND (attr);
+ dwarf_decode_lines (line_offset, abfd);
+
+ /* 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);
+ child_die = sibling_die (child_die);
+ }
+ }
+}
+
+static void
+read_func_scope (die, objfile)
+ struct die_info *die;
+ struct objfile *objfile;
+{
+ register struct context_stack *new;
+ CORE_ADDR lowpc = 0;
+ CORE_ADDR highpc = 0;
+ struct die_info *child_die;
+ struct attribute *attr;
+ struct minimal_symbol *min_sym;
+ char *name = NULL;
+
+ attr = dwarf_attr (die, DW_AT_name);
+ if (attr)
+ {
+ name = DW_STRING (attr);
+ }
+
+ attr = dwarf_attr (die, DW_AT_low_pc);
+ if (attr)
+ {
+ lowpc = DW_ADDR (attr);
+ }
+
+ attr = dwarf_attr (die, DW_AT_high_pc);
+ if (attr)
+ {
+ highpc = DW_ADDR (attr);
+ }
+
+ if (objfile->ei.entry_point >= lowpc &&
+ objfile->ei.entry_point < highpc)
+ {
+ objfile->ei.entry_func_lowpc = lowpc;
+ objfile->ei.entry_func_highpc = highpc;
+ }
+
+ if (STREQ (name, "main")) /* FIXME: hardwired name */
+ {
+ objfile->ei.main_func_lowpc = lowpc;
+ objfile->ei.main_func_highpc = highpc;
+ }
+ new = push_context (0, lowpc);
+ new->name = new_symbol (die, objfile);
+ list_in_scope = &local_symbols;
+
+ if (die->has_children)
+ {
+ child_die = die->next;
+ while (child_die && child_die->tag)
+ {
+ process_die (child_die, objfile);
+ 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 (die, objfile)
+ struct die_info *die;
+ struct objfile *objfile;
+{
+ register struct context_stack *new;
+ CORE_ADDR lowpc = 0, highpc = 0;
+ struct attribute *attr;
+ struct die_info *child_die;
+
+ attr = dwarf_attr (die, DW_AT_low_pc);
+ if (attr)
+ {
+ lowpc = DW_ADDR (attr);
+ }
+ attr = dwarf_attr (die, DW_AT_high_pc);
+ if (attr)
+ {
+ highpc = DW_ADDR (attr);
+ }
+
+ push_context (0, lowpc);
+ if (die->has_children)
+ {
+ child_die = die->next;
+ while (child_die && child_die->tag)
+ {
+ process_die (child_die, objfile);
+ 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;
+}
+
+/* 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 (die, objfile)
+ struct die_info *die;
+ struct objfile *objfile;
+{
+ struct type *type, *member_type;
+ struct field *fields;
+ struct die_info *child_die;
+ struct attribute *attr;
+ struct symbol *sym;
+ int num_fields;
+
+ type = dwarf_alloc_type (objfile);
+
+ INIT_CPLUS_SPECIFIC (type);
+ attr = dwarf_attr (die, DW_AT_name);
+
+ if (die->tag == DW_TAG_structure_type)
+ {
+ TYPE_CODE (type) = TYPE_CODE_STRUCT;
+ if (attr)
+ {
+ TYPE_NAME (type) = obconcat (&objfile->type_obstack,
+ "struct", " ", DW_STRING (attr));
+ }
+ }
+ else
+ {
+ /* die->tag == DW_TAG_union_type */
+ TYPE_CODE (type) = TYPE_CODE_UNION;
+ if (attr)
+ {
+ TYPE_NAME (type) = obconcat (&objfile->type_obstack,
+ "union", " ", DW_STRING (attr));
+ }
+ }
+
+ 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;
+
+ 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_member)
+ {
+ process_die (child_die, objfile);
+ }
+ else
+ {
+ if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
+ {
+ fields = (struct field *)
+ xrealloc (fields,
+ (num_fields + DW_FIELD_ALLOC_CHUNK)
+ * sizeof (struct field));
+ }
+
+ /* Get bit offset of field */
+ attr = dwarf_attr (child_die, DW_AT_bit_offset);
+ if (attr)
+ {
+ fields[num_fields].bitpos = DW_UNSND (attr);
+ }
+ else
+ {
+ fields[num_fields].bitpos = 0;
+ }
+ attr = dwarf_attr (child_die, DW_AT_data_member_location);
+ if (attr)
+ {
+ fields[num_fields].bitpos +=
+ decode_locdesc (DW_BLOCK (attr), objfile) * bits_per_byte;
+ }
+
+ /* Get bit size of field (zero if none). */
+ attr = dwarf_attr (child_die, DW_AT_bit_size);
+ if (attr)
+ {
+ fields[num_fields].bitsize = DW_UNSND (attr);
+ }
+ else
+ {
+ fields[num_fields].bitsize = 0;
+ }
+
+ /* Get type of member. */
+ member_type = die_type (child_die, objfile);
+ fields[num_fields].type = member_type;
+
+ /* Get name of member. */
+ attr = dwarf_attr (child_die, DW_AT_name);
+ if (attr)
+ {
+ fields[num_fields].name = obsavestring (DW_STRING (attr),
+ strlen (DW_STRING (attr)),
+ &objfile->type_obstack);
+#if 0
+ fields[num_fields].name = strdup (DW_STRING (attr));
+#endif
+ }
+ num_fields++;
+ }
+ child_die = sibling_die (child_die);
+ }
+ type->nfields = num_fields;
+ type->fields = fields;
+ }
+ else
+ {
+ /* No children, must be stub. */
+ TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
+ }
+
+ die->type = type;
+ sym = new_symbol (die, objfile);
+ if (sym != NULL)
+ {
+ SYMBOL_TYPE (sym) = 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 (die, objfile)
+ struct die_info *die;
+ struct objfile *objfile;
+{
+ struct die_info *child_die;
+ struct type *type;
+ struct field *fields;
+ struct attribute *attr;
+ struct symbol *sym;
+ struct dwarf_block *blk;
+ int num_fields;
+ unsigned int size, bytes_read, i;
+
+ type = dwarf_alloc_type (objfile);
+
+ TYPE_CODE (type) = TYPE_CODE_ENUM;
+ attr = dwarf_attr (die, DW_AT_name);
+ if (attr)
+ {
+ TYPE_NAME (type) = obconcat (&objfile->type_obstack,
+ "enum ", " ", DW_STRING (attr));
+ }
+
+ 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);
+ }
+ else
+ {
+ if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
+ {
+ fields = (struct field *)
+ xrealloc (fields,
+ (num_fields + DW_FIELD_ALLOC_CHUNK)
+ * sizeof (struct field));
+ }
+
+ /* Handcraft a new symbol for this enum member. */
+ sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack,
+ sizeof (struct symbol));
+ memset (sym, 0, sizeof (struct symbol));
+
+ fields[num_fields].type = NULL;
+ fields[num_fields].bitsize = 0;
+ attr = dwarf_attr (child_die, DW_AT_name);
+ if (attr)
+ {
+ fields[num_fields].name = strdup (DW_STRING (attr));
+ SYMBOL_NAME (sym) = strdup (fields[num_fields].name);
+ }
+ attr = dwarf_attr (child_die, DW_AT_const_value);
+ if (attr)
+ {
+ fields[num_fields].bitpos = DW_UNSND (attr);
+ SYMBOL_VALUE (sym) = DW_UNSND (attr);
+ }
+
+#if 0
+ SYMBOL_NAME (sym) = create_name (elist->str,
+ &objfile->symbol_obstack);
+#endif
+ SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language);
+ SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
+ SYMBOL_CLASS (sym) = LOC_CONST;
+ SYMBOL_TYPE (sym) = type;
+ add_symbol_to_list (sym, list_in_scope);
+
+ num_fields++;
+ }
+
+ child_die = sibling_die (child_die);
+ }
+ type->fields = fields;
+ type->nfields = num_fields;
+ }
+ die->type = type;
+ sym = new_symbol (die, objfile);
+ if (sym != NULL)
+ {
+ SYMBOL_TYPE (sym) = type;
+ }
+}
+
+/* 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
+dwarf_read_array_type (die, objfile)
+ struct die_info *die;
+ struct objfile *objfile;
+{
+ struct die_info *child_die;
+ struct type *type, *element_type, *range_type, *index_type;
+ struct attribute *attr;
+ struct dwarf_block *blk;
+ unsigned int size, i, type_form, bytes_read;
+ unsigned int index_spec, lo_spec, hi_spec, type_ref;
+ unsigned int low, high;
+
+ /* Return if we've already decoded this type. */
+ if (die->type)
+ {
+ return;
+ }
+
+ element_type = die_type (die, objfile);
+
+ low = 0;
+ high = 1;
+ if (cu_language == DW_LANG_Fortran77 || cu_language == DW_LANG_Fortran90)
+ {
+ /* FORTRAN implies a lower bound of 1, if not given. */
+ low = 1;
+ }
+
+ child_die = die->next;
+ while (child_die && child_die->tag)
+ {
+ if (child_die->tag == DW_TAG_subrange_type)
+ {
+ index_type = die_type (child_die, objfile);
+ 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
+ {
+ if (!array_bound_warning_given)
+ {
+ warning ("Non-constant array bounds ignored.");
+ array_bound_warning_given = 1;
+ }
+#ifdef FORTRAN_HACK
+ type = dwarf_alloc_type (objfile);
+ TYPE_TARGET_TYPE (type) = element_type;
+ TYPE_OBJFILE (type) = objfile;
+ TYPE_LENGTH (type) = 4;
+ TYPE_CODE (type) = TYPE_CODE_PTR;
+ TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED;
+ TYPE_POINTER_TYPE (element_type) = type;
+ goto done;
+#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 (!array_bound_warning_given)
+ {
+ warning ("Non-constant array bounds ignored.");
+ array_bound_warning_given = 1;
+ }
+#ifdef FORTRAN_HACK
+ type = dwarf_alloc_type (objfile);
+ TYPE_TARGET_TYPE (type) = element_type;
+ TYPE_OBJFILE (type) = objfile;
+ TYPE_LENGTH (type) = 4;
+ TYPE_CODE (type) = TYPE_CODE_PTR;
+ TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED;
+ TYPE_POINTER_TYPE (element_type) = type;
+ goto done;
+#else
+ high = 1;
+#endif
+ }
+ }
+ }
+ range_type = create_range_type (NULL, index_type, low, high);
+ type = create_array_type (NULL, element_type, range_type);
+ element_type = type;
+ child_die = sibling_die (child_die);
+ }
+done:
+ /* 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 (die, objfile)
+ struct die_info *die;
+ struct objfile *objfile;
+{
+ struct die_info *child_die;
+ struct attribute *attr;
+ struct symbol *sym;
+ CORE_ADDR base;
+
+ attr = dwarf_attr (die, DW_AT_location);
+ if (attr)
+ {
+ base = decode_locdesc (DW_BLOCK (attr), objfile);
+ }
+ if (die->has_children)
+ {
+ child_die = die->next;
+ while (child_die && child_die->tag)
+ {
+ sym = new_symbol (child_die, objfile);
+ attr = dwarf_attr (child_die, DW_AT_data_member_location);
+ if (attr)
+ {
+ SYMBOL_VALUE_ADDRESS (sym) =
+ base + decode_locdesc (DW_BLOCK (attr), objfile);
+ 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 (die, objfile)
+ struct die_info *die;
+ struct objfile *objfile;
+{
+ struct type *type, *pointed_to_type;
+ struct attribute *attr;
+
+ if (die->type)
+ {
+ return;
+ }
+
+ pointed_to_type = die_type (die, objfile);
+
+ type = dwarf_alloc_type (objfile);
+ TYPE_TARGET_TYPE (type) = pointed_to_type;
+ TYPE_OBJFILE (type) = objfile;
+ attr = dwarf_attr (die, DW_AT_byte_size);
+ if (attr)
+ {
+ TYPE_LENGTH (type) = DW_UNSND (attr);
+ }
+ else
+ {
+ TYPE_LENGTH (type) = address_size;
+ }
+ TYPE_CODE (type) = TYPE_CODE_PTR;
+ TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED;
+
+ TYPE_POINTER_TYPE (pointed_to_type) = type;
+ die->type = type;
+}
+
+static void
+read_tag_const_type (die, objfile)
+ struct die_info *die;
+ struct objfile *objfile;
+{
+ if (die->type)
+ {
+ return;
+ }
+
+ if (!tag_const_warning_given)
+ {
+ warning ("gdb ignores `const' qualifiers.");
+ tag_const_warning_given = 1;
+ }
+
+ die->type = die_type (die, objfile);
+}
+
+static void
+read_tag_volatile_type (die, objfile)
+ struct die_info *die;
+ struct objfile *objfile;
+{
+ if (die->type)
+ {
+ return;
+ }
+
+ if (!tag_volatile_warning_given)
+ {
+ warning ("gdb ignores `volatile' qualifiers.");
+ tag_volatile_warning_given = 1;
+ }
+
+ die->type = die_type (die, objfile);
+}
+
+/* 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 (die, objfile)
+ 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)
+
+ NOTE: parameter DIES are currently ignored. See if gdb has a way to
+ include this info in it's type system, and decode them if so. Is
+ this what the type structure's "arg_types" field is for? (FIXME) */
+
+static void
+read_subroutine_type (die, objfile)
+ struct die_info *die;
+ struct objfile *objfile;
+{
+ struct type *type; /* Type that this function returns */
+ struct type *ftype; /* Function that returns above type */
+
+ /* Decode the type that this subroutine returns */
+ if (die->type)
+ {
+ return;
+ }
+ type = die_type (die, objfile);
+ ftype = lookup_function_type (type);
+
+ TYPE_TARGET_TYPE (ftype) = type;
+ TYPE_LENGTH (ftype) = 1;
+ TYPE_CODE (ftype) = TYPE_CODE_FUNC;
+ TYPE_OBJFILE (ftype) = objfile;
+
+ die->type = type;
+}
+
+static void
+read_typedef (die, objfile)
+ struct die_info *die;
+ struct objfile *objfile;
+{
+ struct type *type;
+
+ if (!die->type)
+ {
+ type = die_type (die, objfile);
+ 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 (die, objfile)
+ 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);
+ }
+ type = dwarf_base_type (encoding, size);
+ die->type = type;
+}
+
+/* Read a whole compilation unit into a linked list of dies. */
+
+struct die_info *
+read_comp_unit (info_ptr, abfd)
+ char *info_ptr;
+ bfd *abfd;
+{
+ struct die_info *first_die, *last_die, *die;
+ char *cur_ptr;
+ int nesting_level;
+
+ cur_ptr = info_ptr;
+ nesting_level = 0;
+ first_die = last_die = NULL;
+ do
+ {
+ cur_ptr = read_full_die (&die, abfd, cur_ptr);
+ 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 (dies)
+ struct die_info *dies;
+{
+ struct die_info *die, *next;
+
+ die = dies;
+ while (die)
+ {
+ next = die->next;
+ free (die->attrs);
+ free (die);
+ die = next;
+ }
+}
+
+/* Read the contents of the section at OFFSET and of size SIZE in the
+ object file specified by ABFD into a buffer of bytes and return it. */
+
+static char *
+dwarf2_read_section (abfd, offset, size)
+ bfd * abfd;
+ file_ptr offset;
+ unsigned int size;
+{
+ char *buf;
+
+ buf = xmalloc (size);
+ if ((bfd_seek (abfd, offset, SEEK_SET) != 0) ||
+ (bfd_read (buf, size, 1, abfd) != size))
+ {
+ free (buf);
+ 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 (abfd, offset)
+ 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 ();
+
+ 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 = 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 abbrev */
+ abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
+ abbrev_ptr += bytes_read;
+ }
+}
+
+/* Empty the abbrev table for a new compilation unit. */
+
+static void
+dwarf2_empty_abbrev_table ()
+{
+ 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;
+ free (abbrev->attrs);
+ free (abbrev);
+ abbrev = next;
+ }
+ dwarf2_abbrevs[i] = NULL;
+ }
+}
+
+/* Lookup an abbrev_info structure in the abbrev hash table. */
+
+static struct abbrev_info *
+dwarf2_lookup_abbrev (number)
+ 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 (part_die, abfd, info_ptr, has_pc_info)
+ struct partial_die_info *part_die;
+ bfd * abfd;
+ char *info_ptr;
+ int *has_pc_info;
+{
+ unsigned int abbrev_number, bytes_read, i;
+ struct abbrev_info *abbrev;
+ char ebuf[256];
+ int has_low_pc_attr = 0;
+ int has_high_pc_attr = 0;
+
+ *has_pc_info = 0;
+ abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ if (!abbrev_number)
+ {
+ part_die->tag = 0;
+ part_die->has_children = 0;
+ part_die->abbrev = 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->is_external = 0;
+ part_die->abbrev = abbrev_number;
+
+ {
+ char *str = "";
+ struct dwarf_block *blk = 0;
+ CORE_ADDR addr = ((CORE_ADDR) -1);
+ unsigned int unsnd = ((unsigned int) -1);
+ int snd = -1;
+
+ for (i = 0; i < abbrev->num_attrs; ++i)
+ {
+ /* read the correct type of data */
+ switch (abbrev->attrs[i].form)
+ {
+ case DW_FORM_addr:
+ addr = read_address (abfd, info_ptr);
+ info_ptr += address_size;
+ break;
+ case DW_FORM_ref_addr:
+ addr = read_address (abfd, info_ptr);
+ info_ptr += address_size;
+ 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;
+ break;
+ case DW_FORM_block4:
+ blk = dwarf_alloc_block ();
+ blk->size = read_4_bytes (abfd, info_ptr);
+ info_ptr += 2;
+ blk->data = read_n_bytes (abfd, info_ptr, blk->size);
+ info_ptr += blk->size;
+ break;
+ case DW_FORM_data2:
+ unsnd = read_2_bytes (abfd, info_ptr);
+ info_ptr += 2;
+ break;
+ case DW_FORM_data4:
+ unsnd = read_4_bytes (abfd, info_ptr);
+ info_ptr += 4;
+ break;
+ case DW_FORM_data8:
+ unsnd = read_8_bytes (abfd, info_ptr);
+ info_ptr += 8;
+ break;
+ case DW_FORM_string:
+ str = 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;
+ 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;
+ break;
+ case DW_FORM_data1:
+ unsnd = read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+ break;
+ case DW_FORM_ref1:
+ unsnd = read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+ break;
+ case DW_FORM_ref2:
+ unsnd = read_2_bytes (abfd, info_ptr);
+ info_ptr += 2;
+ break;
+ case DW_FORM_ref4:
+ unsnd = read_4_bytes (abfd, info_ptr);
+ info_ptr += 4;
+ break;
+ case DW_FORM_ref_udata:
+ unsnd = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_flag:
+ unsnd = read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+ break;
+ case DW_FORM_sdata:
+ snd = read_signed_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_udata:
+ unsnd = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_indirect:
+ default:
+ sprintf (ebuf,
+ "Dwarf Error: Cannot handle %s in DWARF reader.",
+ dwarf_form_name (abbrev->attrs[i].form));
+ error (ebuf);
+ }
+
+ /* store the data if it is of an attribute we want to keep in a
+ partial symbol table */
+ switch (abbrev->attrs[i].name)
+ {
+ case DW_AT_name:
+ part_die->name = str;
+ break;
+ case DW_AT_low_pc:
+ has_low_pc_attr = 1;
+ part_die->lowpc = addr;
+ break;
+ case DW_AT_high_pc:
+ has_high_pc_attr = 1;
+ part_die->highpc = addr;
+ break;
+ case DW_AT_location:
+ part_die->locdesc = blk;
+ break;
+ case DW_AT_language:
+ part_die->language = unsnd;
+ break;
+ case DW_AT_external:
+ part_die->is_external = unsnd;
+ }
+ }
+ }
+ *has_pc_info = has_low_pc_attr && has_high_pc_attr;
+ 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 (diep, abfd, info_ptr)
+ struct die_info **diep;
+ bfd *abfd;
+ char *info_ptr;
+{
+ unsigned int abbrev_number, bytes_read, i, offset;
+ struct abbrev_info *abbrev;
+ struct die_info *die;
+ char ebuf[256];
+
+ 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 = xmalloc (die->num_attrs * sizeof (struct attribute));
+
+ {
+ char *str;
+ struct dwarf_block *blk;
+ unsigned long addr;
+ unsigned int unsnd;
+ int snd;
+
+ for (i = 0; i < abbrev->num_attrs; ++i)
+ {
+ /* read the correct type of data */
+
+ die->attrs[i].name = abbrev->attrs[i].name;
+ die->attrs[i].form = abbrev->attrs[i].form;
+
+ switch (abbrev->attrs[i].form)
+ {
+ case DW_FORM_addr:
+ case DW_FORM_ref_addr:
+ die->attrs[i].u.addr = read_address (abfd, info_ptr);
+ info_ptr += address_size;
+ 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;
+ die->attrs[i].u.blk = blk;
+ break;
+ case DW_FORM_block4:
+ blk = dwarf_alloc_block ();
+ blk->size = read_4_bytes (abfd, info_ptr);
+ info_ptr += 2;
+ blk->data = read_n_bytes (abfd, info_ptr, blk->size);
+ info_ptr += blk->size;
+ die->attrs[i].u.blk = blk;
+ break;
+ case DW_FORM_data2:
+ die->attrs[i].u.unsnd = read_2_bytes (abfd, info_ptr);
+ info_ptr += 2;
+ break;
+ case DW_FORM_data4:
+ die->attrs[i].u.unsnd = read_4_bytes (abfd, info_ptr);
+ info_ptr += 4;
+ break;
+ case DW_FORM_data8:
+ die->attrs[i].u.unsnd = read_8_bytes (abfd, info_ptr);
+ info_ptr += 8;
+ break;
+ case DW_FORM_string:
+ die->attrs[i].u.str = 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;
+ die->attrs[i].u.blk = 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;
+ die->attrs[i].u.blk = blk;
+ break;
+ case DW_FORM_data1:
+ die->attrs[i].u.unsnd = read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+ break;
+ case DW_FORM_ref1:
+ die->attrs[i].u.unsnd = read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+ break;
+ case DW_FORM_ref2:
+ die->attrs[i].u.unsnd = read_2_bytes (abfd, info_ptr);
+ info_ptr += 2;
+ break;
+ case DW_FORM_ref4:
+ die->attrs[i].u.unsnd = read_4_bytes (abfd, info_ptr);
+ info_ptr += 4;
+ break;
+ case DW_FORM_ref_udata:
+ die->attrs[i].u.unsnd = read_unsigned_leb128 (abfd,
+ info_ptr,
+ &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_flag:
+ die->attrs[i].u.unsnd = read_1_byte (abfd, info_ptr);
+ info_ptr += 1;
+ break;
+ case DW_FORM_sdata:
+ die->attrs[i].u.snd = read_signed_leb128 (abfd,
+ info_ptr,
+ &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_udata:
+ die->attrs[i].u.unsnd = read_unsigned_leb128 (abfd,
+ info_ptr,
+ &bytes_read);
+ info_ptr += bytes_read;
+ break;
+ case DW_FORM_indirect:
+ default:
+ sprintf (ebuf,
+ "Dwarf Error: Cannot handle %s in DWARF reader.",
+ dwarf_form_name (abbrev->attrs[i].form));
+ error (ebuf);
+ }
+
+ }
+ }
+ *diep = die;
+ return info_ptr;
+}
+
+/* read dwarf information from a buffer */
+
+static unsigned int
+read_1_byte (abfd, buf)
+ bfd *abfd;
+ char *buf;
+{
+ return bfd_get_8 (abfd, (bfd_byte *) buf);
+}
+
+static unsigned int
+read_2_bytes (abfd, buf)
+ bfd *abfd;
+ char *buf;
+{
+ return bfd_get_16 (abfd, (bfd_byte *) buf);
+}
+
+static unsigned int
+read_4_bytes (abfd, buf)
+ bfd *abfd;
+ char *buf;
+{
+ return bfd_get_32 (abfd, (bfd_byte *) buf);
+}
+
+static unsigned int
+read_8_bytes (abfd, buf)
+ bfd *abfd;
+ char *buf;
+{
+ return bfd_get_64 (abfd, (bfd_byte *) buf);
+}
+
+static CORE_ADDR
+read_address (abfd, buf)
+ bfd *abfd;
+ char *buf;
+{
+ CORE_ADDR retval = 0;
+
+ if (address_size == 4)
+ {
+ retval = bfd_get_32 (abfd, (bfd_byte *) buf);
+ } else { /* *THE* alternative is 8, right? */
+ retval = bfd_get_64 (abfd, (bfd_byte *) buf);
+ }
+ return retval;
+}
+
+static char *
+read_n_bytes (abfd, buf, size)
+ bfd * abfd;
+ char *buf;
+ unsigned int size;
+{
+ char *ret;
+ unsigned int i;
+
+ ret = xmalloc (size);
+ for (i = 0; i < size; ++i)
+ {
+ ret[i] = bfd_get_8 (abfd, (bfd_byte *) buf);
+ buf++;
+ }
+ return ret;
+}
+
+/* FIXME : hardwired string size limit */
+
+static char *
+read_string (abfd, buf, bytes_read_ptr)
+ bfd *abfd;
+ char *buf;
+ unsigned int *bytes_read_ptr;
+{
+ char ret_buf[DWARF2_MAX_STRING_SIZE], *ret, byte;
+ unsigned int i;
+
+ i = 0;
+ do
+ {
+ byte = bfd_get_8 (abfd, (bfd_byte *) buf);
+ buf++;
+ ret_buf[i++] = byte;
+ }
+ while (byte);
+ if (i == 1)
+ {
+ *bytes_read_ptr = 1;
+ return NULL;
+ }
+ ret = xmalloc (i);
+ strncpy (ret, ret_buf, i);
+ *bytes_read_ptr = i;
+ return ret;
+}
+
+static unsigned int
+read_unsigned_leb128 (abfd, buf, bytes_read_ptr)
+ bfd *abfd;
+ char *buf;
+ unsigned int *bytes_read_ptr;
+{
+ unsigned int result, 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 |= ((byte & 127) << shift);
+ if ((byte & 128) == 0)
+ {
+ break;
+ }
+ shift += 7;
+ }
+ *bytes_read_ptr = num_read;
+ return result;
+}
+
+static int
+read_signed_leb128 (abfd, buf, bytes_read_ptr)
+ bfd *abfd;
+ char *buf;
+ unsigned int *bytes_read_ptr;
+{
+ int 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 |= ((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 (lang)
+ unsigned int lang;
+{
+ switch (lang)
+ {
+ case DW_LANG_C89:
+ case DW_LANG_C:
+ case DW_LANG_Fortran77:
+ cu_language = language_c;
+ break;
+ case DW_LANG_C_plus_plus:
+ cu_language = language_cplus;
+ break;
+ case DW_LANG_Ada83:
+ case DW_LANG_Cobol74:
+ case DW_LANG_Cobol85:
+#if 0
+ case DW_LANG_Fortran77: /* moved up top for now */
+#endif
+ case DW_LANG_Fortran90:
+ case DW_LANG_Pascal83:
+ case DW_LANG_Modula2:
+ default:
+ cu_language = language_unknown;
+ break;
+ }
+ cu_language_defn = language_def (cu_language);
+}
+
+static void
+record_minimal_symbol (name, address, ms_type, objfile)
+ char *name;
+ CORE_ADDR address;
+ enum minimal_symbol_type ms_type;
+ struct objfile *objfile;
+{
+ name = obsavestring (name, strlen (name), &objfile->symbol_obstack);
+ prim_record_minimal_symbol (name, address, ms_type, objfile);
+}
+
+/* Converts a location description into gdb form. */
+
+static int
+convert_locdesc (blk)
+ struct dwarf_block *blk;
+{
+ /* FIXME : this is only a stub! */
+ return 0;
+}
+
+/* Return the named attribute or NULL if not there. */
+
+static struct attribute *
+dwarf_attr (die, name)
+ struct die_info *die;
+ unsigned int name;
+{
+ unsigned int i;
+
+ for (i = 0; i < die->num_attrs; ++i)
+ {
+ if (die->attrs[i].name == name)
+ {
+ return &die->attrs[i];
+ }
+ }
+ return NULL;
+}
+
+/* Decode the line number information for the compilation unit whose
+ line number info is at OFFSET in the .debug_line section. */
+
+struct filenames
+{
+ int num_files;
+ struct file
+ {
+ char *name;
+ unsigned int dir;
+ unsigned int time;
+ unsigned int size;
+ }
+ *files;
+};
+
+struct directories
+{
+ int num_dirs;
+ char **dirs;
+};
+
+static void
+dwarf_decode_lines (offset, abfd)
+ unsigned int offset;
+ bfd *abfd;
+{
+ char *line_ptr;
+ 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;
+
+ /* state machine registers */
+ unsigned int address = 0;
+ unsigned int file = 1;
+ unsigned int line = 1;
+ unsigned int column = 0;
+ int is_stmt; /* initialized below */
+ int basic_block = 0;
+ int beg_of_comp_unit = 0; /* is this right? */
+ int end_sequence = 0;
+
+ 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_4_bytes (abfd, line_ptr);
+ line_ptr += 4;
+ lh.version = read_2_bytes (abfd, line_ptr);
+ line_ptr += 2;
+ lh.prologue_length = read_4_bytes (abfd, line_ptr);
+ line_ptr += 4;
+ lh.minimum_instruction_length = read_1_byte (abfd, line_ptr);
+ line_ptr += 1;
+ lh.default_is_stmt = read_1_byte (abfd, line_ptr);
+ is_stmt = lh.default_is_stmt;
+ line_ptr += 1;
+ lh.line_base = read_1_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, 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))
+ {
+ line_ptr += bytes_read;
+ if ((dirs.num_dirs % DIR_ALLOC_CHUNK) == 0)
+ {
+ dirs.dirs = xrealloc (dirs.dirs,
+ (dirs.num_dirs + DIR_ALLOC_CHUNK) * sizeof (char *));
+ }
+ 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))
+ {
+ line_ptr += bytes_read;
+ if ((files.num_files % FILE_ALLOC_CHUNK) == 0)
+ {
+ files.files = xrealloc (files.files,
+ (files.num_files + FILE_ALLOC_CHUNK) * sizeof (struct file));
+ }
+ 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;
+
+ /* Decode the table. */
+ if (lh.total_length - (lh.prologue_length + 4 + 2) >= 4)
+ do
+ {
+ 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;
+ record_line (current_subfile, line, address);
+ return; /* return! */
+ break;
+ case DW_LNE_set_address:
+ address = read_address (abfd, line_ptr);
+ line_ptr += address_size;
+ 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 = xrealloc (files.files,
+ (files.num_files + FILE_ALLOC_CHUNK)
+ * sizeof (struct file));
+ }
+ 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;
+ break;
+ default:
+ error ("Dwarf Error: Mangled .debug_line section.");
+ return;
+ }
+ 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 table is 0 based and the references are 1
+ based, thus the subtraction of `1' at the end of the
+ next line */
+ file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read) - 1;
+ start_subfile (files.files[file].name,
+ (files.files[file].dir ?
+ dirs.dirs[files.files[file].dir] : 0));
+ line_ptr += bytes_read;
+ 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;
+ case DW_LNS_const_add_pc:
+ address += (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;
+ }
+ }
+ while (1);
+ do_cleanups (back_to);
+}
+
+/* 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. */
+
+static struct symbol *
+new_symbol (die, objfile)
+ struct die_info *die;
+ struct objfile *objfile;
+{
+ struct symbol *sym = NULL;
+ struct attribute *attr = NULL;
+ struct attribute *attr2 = NULL;
+ CORE_ADDR addr;
+
+ attr = dwarf_attr (die, DW_AT_name);
+ if (attr)
+ {
+#if 0
+ sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack,
+ sizeof (struct symbol));
+#endif
+ sym = (struct symbol *) xmalloc (sizeof (struct symbol));
+ memset (sym, 0, sizeof (struct symbol));
+#if 0
+ SYMBOL_NAME (sym) = create_name (DW_STRING (attr),
+ &objfile->symbol_obstack);
+#endif
+ SYMBOL_NAME (sym) = strdup (DW_STRING (attr));
+ /* default assumptions */
+ SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
+ SYMBOL_CLASS (sym) = LOC_STATIC;
+ SYMBOL_TYPE (sym) = die_type (die, objfile);
+
+ /* 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);
+ }
+ SYMBOL_CLASS (sym) = LOC_LABEL;
+ break;
+ case DW_TAG_subprogram:
+ attr = dwarf_attr (die, DW_AT_low_pc);
+ if (attr)
+ {
+ SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr);
+ }
+ SYMBOL_TYPE (sym) = make_function_type (die_type (die, objfile),
+ NULL);
+ 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:
+ 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);
+ add_symbol_to_list (sym, &global_symbols);
+ SYMBOL_CLASS (sym) = LOC_STATIC;
+ SYMBOL_VALUE_ADDRESS (sym) += baseaddr;
+ }
+ else
+ {
+ SYMBOL_VALUE (sym) = addr =
+ decode_locdesc (DW_BLOCK (attr), objfile);
+ add_symbol_to_list (sym, list_in_scope);
+ if (isreg)
+ {
+ SYMBOL_CLASS (sym) = LOC_REGISTER;
+ }
+ else if (offreg)
+ {
+ SYMBOL_CLASS (sym) = LOC_LOCAL;
+ }
+ else
+ {
+ SYMBOL_CLASS (sym) = LOC_STATIC;
+ SYMBOL_VALUE_ADDRESS (sym) = addr + baseaddr;
+ }
+ }
+ }
+ break;
+ case DW_TAG_formal_parameter:
+ attr = dwarf_attr (die, DW_AT_location);
+ if (attr != NULL)
+ {
+ SYMBOL_VALUE (sym) = decode_locdesc (DW_BLOCK (attr), objfile);
+ }
+ add_symbol_to_list (sym, list_in_scope);
+ if (isreg)
+ {
+ SYMBOL_CLASS (sym) = LOC_REGPARM;
+ }
+ else
+ {
+ SYMBOL_CLASS (sym) = LOC_ARG;
+ }
+ 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);
+ break;
+ case DW_TAG_typedef:
+ SYMBOL_CLASS (sym) = LOC_TYPEDEF;
+ SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
+ 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. */
+ break;
+ }
+ }
+ return (sym);
+}
+
+/* Return the type of the die in question using its DW_AT_type attribute. */
+
+static struct type *
+die_type (die, objfile)
+ struct die_info *die;
+ struct objfile *objfile;
+{
+ struct type *type;
+ struct attribute *attr, *type_attr;
+ struct die_info *type_die;
+ unsigned int size = 0, encoding = 0, ref;
+
+ type_attr = dwarf_attr (die, DW_AT_type);
+ if (!type_attr)
+ {
+ type = dwarf_base_type (0, 0);
+ return type;
+ }
+ else
+ {
+ ref = DW_UNSND (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);
+ if (!type)
+ {
+ error ("Dwarf Error: Problem turning type die at offset into gdb type:");
+ dump_die (type_die);
+ }
+ return type;
+}
+
+static struct type *
+type_at_offset (offset, objfile)
+ 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;
+}
+
+static struct type *
+tag_type_to_type (die, objfile)
+ struct die_info *die;
+ struct objfile *objfile;
+{
+ if (die->type)
+ {
+ return die->type;
+ }
+ else
+ {
+ read_type_die (die, objfile);
+ if (!die->type)
+ {
+ dump_die (die);
+ error ("Dwarf Error: Cannot find type of die:");
+ }
+ return die->type;
+ }
+}
+
+static void
+read_type_die (die, objfile)
+ struct die_info *die;
+ struct objfile *objfile;
+{
+ switch (die->tag)
+ {
+ case DW_TAG_class_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_union_type:
+ read_structure_scope (die, objfile);
+ break;
+ case DW_TAG_enumeration_type:
+ read_enumeration (die, objfile);
+ break;
+ case DW_TAG_subroutine_type:
+ read_subroutine_type (die, objfile);
+ break;
+ case DW_TAG_array_type:
+ dwarf_read_array_type (die, objfile);
+ break;
+ case DW_TAG_pointer_type:
+ read_tag_pointer_type (die, objfile);
+ break;
+ case DW_TAG_const_type:
+ read_tag_const_type (die, objfile);
+ break;
+ case DW_TAG_volatile_type:
+ read_tag_volatile_type (die, objfile);
+ break;
+ case DW_TAG_string_type:
+ read_tag_string_type (die, objfile);
+ break;
+ case DW_TAG_typedef:
+ read_typedef (die, objfile);
+ break;
+ case DW_TAG_base_type:
+ read_base_type (die, objfile);
+ break;
+ case DW_TAG_padding:
+ case DW_TAG_compile_unit:
+ case DW_TAG_subprogram:
+ case DW_TAG_lexical_block:
+ default:
+ break;
+ }
+}
+
+static struct type *
+dwarf_base_type (encoding, size)
+ int encoding;
+ int size;
+{
+ /* 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 (current_objfile, FT_VOID);
+ return type;
+ case DW_ATE_boolean:
+ type = dwarf2_fundamental_type (current_objfile, FT_BOOLEAN);
+ return type;
+ case DW_ATE_complex_float:
+ if (size == 16)
+ {
+ type = dwarf2_fundamental_type (current_objfile, FT_DBL_PREC_COMPLEX);
+ }
+ else
+ {
+ type = dwarf2_fundamental_type (current_objfile, FT_COMPLEX);
+ }
+ return type;
+ case DW_ATE_float:
+ if (size == 8)
+ {
+ type = dwarf2_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT);
+ }
+ else
+ {
+ type = dwarf2_fundamental_type (current_objfile, FT_FLOAT);
+ }
+ return type;
+ case DW_ATE_signed:
+ switch (size)
+ {
+ case 1:
+ type = dwarf2_fundamental_type (current_objfile, FT_SIGNED_CHAR);
+ break;
+ case 2:
+ type = dwarf2_fundamental_type (current_objfile, FT_SIGNED_SHORT);
+ break;
+ default:
+ case 4:
+ type = dwarf2_fundamental_type (current_objfile, FT_SIGNED_INTEGER);
+ break;
+ }
+ return type;
+ case DW_ATE_signed_char:
+ type = dwarf2_fundamental_type (current_objfile, FT_SIGNED_CHAR);
+ return type;
+ case DW_ATE_unsigned:
+ switch (size)
+ {
+ case 1:
+ type = dwarf2_fundamental_type (current_objfile, FT_UNSIGNED_CHAR);
+ break;
+ case 2:
+ type = dwarf2_fundamental_type (current_objfile, FT_SIGNED_SHORT);
+ break;
+ default:
+ case 4:
+ type = dwarf2_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER);
+ break;
+ }
+ return type;
+ case DW_ATE_unsigned_char:
+ type = dwarf2_fundamental_type (current_objfile, FT_UNSIGNED_CHAR);
+ return type;
+ default:
+ type = dwarf2_fundamental_type (current_objfile, FT_SIGNED_INTEGER);
+ return type;
+ }
+}
+
+/* Given a pointer to a string and a pointer to an obstack, allocates
+ a fresh copy of the string on the specified obstack. */
+
+static char *
+create_name (name, obstackp)
+ char *name;
+ struct obstack *obstackp;
+{
+ int length;
+ char *newname;
+
+ length = strlen (name) + 1;
+ newname = (char *) obstack_alloc (obstackp, length);
+ strcpy (newname, name);
+ return (newname);
+}
+
+struct die_info *
+copy_die (old_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;
+}
+
+/* Return sibling of die, NULL if no sibling. */
+
+struct die_info *
+sibling_die (die)
+ struct die_info *die;
+{
+ struct die_info *new;
+ 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;
+ }
+ }
+}
+
+/* Convert a DIE tag into its string name. */
+
+static char *
+dwarf_tag_name (tag)
+ 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 (attr)
+ 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 (form)
+ 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 (op)
+ 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 (bool)
+ unsigned bool;
+{
+ if (bool)
+ return "TRUE";
+ else
+ return "FALSE";
+}
+
+/* Convert a DWARF type code into its string name. */
+
+static char *
+dwarf_type_encoding_name (enc)
+ 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. */
+
+static char *
+dwarf_cfi_name (cfi_opc)
+ 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>";
+ }
+}
+
+void
+dump_die (die)
+ struct die_info *die;
+{
+ 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, sizeof (CORE_ADDR) > sizeof (long) ?
+ "address: 0x%LLx" : "address: 0x%x",
+ die->attrs[i].u.addr);
+ break;
+ case DW_FORM_block2:
+ case DW_FORM_block4:
+ case DW_FORM_block:
+ case DW_FORM_block1:
+ fprintf (stderr, "block: size %d",
+ die->attrs[i].u.blk->size);
+ break;
+ case DW_FORM_data1:
+ case DW_FORM_data2:
+ case DW_FORM_data4:
+ case DW_FORM_ref1:
+ case DW_FORM_ref2:
+ case DW_FORM_ref4:
+ case DW_FORM_udata:
+ case DW_FORM_sdata:
+ fprintf (stderr, "constant: %d", die->attrs[i].u.unsnd);
+ break;
+ case DW_FORM_string:
+ fprintf (stderr, "string: \"%s\"", die->attrs[i].u.str);
+ break;
+ case DW_FORM_flag:
+ if (die->attrs[i].u.unsnd)
+ 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 */
+ case DW_FORM_data8: /* we do not have 64 bit quantities */
+ error ("Dwarf Error: Unsupported attribute form: %d.",
+ die->attrs[i].form);
+ }
+ fprintf (stderr, "\n");
+ }
+}
+
+void
+dump_die_list (die)
+ struct die_info *die;
+{
+ while (die)
+ {
+ dump_die (die);
+ die = die->next;
+ }
+}
+
+void
+store_in_ref_table (offset, die)
+ 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;
+}
+
+struct die_info *
+follow_die_ref (offset)
+ 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 (objfile, typeid)
+ 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.
+ There are three cases:
+ An address: return the address.
+ An address relative to frame pointer: return the offset.
+ A register: return register number and set isreg to true.
+ A constant followed by plus: return the constant. */
+
+static CORE_ADDR
+decode_locdesc (blk, objfile)
+ struct dwarf_block *blk;
+ struct objfile *objfile;
+{
+ int i, snd;
+ int size = blk->size;
+ char *data = blk->data;
+ unsigned int bytes_read, unsnd;
+ unsigned char op;
+ union
+ {
+ CORE_ADDR addr;
+ char bytes[sizeof (CORE_ADDR)];
+ }
+ u;
+
+ i = 0;
+ isreg = 0;
+ offreg = 0;
+
+ /* FIXME: handle more general forms of location descriptors. */
+ while (i < size)
+ {
+ op = data[i++];
+ switch (op)
+ {
+ case DW_OP_reg0:
+ isreg = 1;
+ return 0;
+ case DW_OP_reg1:
+ isreg = 1;
+ return 1;
+ case DW_OP_reg2:
+ isreg = 1;
+ return 2;
+ case DW_OP_reg3:
+ isreg = 1;
+ return 3;
+ case DW_OP_reg4:
+ isreg = 1;
+ return 4;
+ case DW_OP_reg5:
+ isreg = 1;
+ return 5;
+ case DW_OP_reg6:
+ isreg = 1;
+ return 6;
+ case DW_OP_reg7:
+ isreg = 1;
+ return 7;
+ case DW_OP_reg8:
+ isreg = 1;
+ return 8;
+ case DW_OP_reg9:
+ isreg = 1;
+ return 9;
+ case DW_OP_reg10:
+ isreg = 1;
+ return 10;
+ case DW_OP_reg11:
+ isreg = 1;
+ return 11;
+ case DW_OP_reg12:
+ isreg = 1;
+ return 12;
+ case DW_OP_reg13:
+ isreg = 1;
+ return 13;
+ case DW_OP_reg14:
+ isreg = 1;
+ return 14;
+ case DW_OP_reg15:
+ isreg = 1;
+ return 15;
+ case DW_OP_reg16:
+ isreg = 1;
+ return 16;
+ case DW_OP_reg17:
+ isreg = 1;
+ return 17;
+ case DW_OP_reg18:
+ isreg = 1;
+ return 18;
+ case DW_OP_reg19:
+ isreg = 1;
+ return 19;
+ case DW_OP_reg20:
+ isreg = 1;
+ return 20;
+ case DW_OP_reg21:
+ isreg = 1;
+ return 21;
+ case DW_OP_reg22:
+ isreg = 1;
+ return 22;
+ case DW_OP_reg23:
+ isreg = 1;
+ return 23;
+ case DW_OP_reg24:
+ isreg = 1;
+ return 24;
+ case DW_OP_reg25:
+ isreg = 1;
+ return 25;
+ case DW_OP_reg26:
+ isreg = 1;
+ return 26;
+ case DW_OP_reg27:
+ isreg = 1;
+ return 27;
+ case DW_OP_reg28:
+ isreg = 1;
+ return 28;
+ case DW_OP_reg29:
+ isreg = 1;
+ return 29;
+ case DW_OP_reg30:
+ isreg = 1;
+ return 30;
+ case DW_OP_reg31:
+ isreg = 1;
+ return 31;
+
+ 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. */
+ return unsnd + 6;
+#else
+ return unsnd;
+#endif
+
+ case DW_OP_fbreg:
+ case DW_OP_breg31:
+ offreg = 1;
+ snd = read_signed_leb128 (NULL, (data + i), &bytes_read);
+ i += bytes_read;
+ return snd;
+
+ case DW_OP_addr:
+ isreg = 0;
+ return read_address (objfile->obfd, &data[i]);
+
+ case DW_OP_constu:
+ unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
+ i += bytes_read;
+ break;
+
+ case DW_OP_plus:
+ return unsnd;
+
+ }
+ }
+ return 0;
+}
+
+/* memory allocation interface */
+
+static struct type *
+dwarf_alloc_type (objfile)
+ struct objfile *objfile;
+{
+ struct type *type;
+
+ type = (struct type *) xmalloc (sizeof (struct type));
+ memset (type, 0, sizeof (struct type));
+
+#if 0
+ type = alloc_type (objfile);
+#endif
+
+ return (type);
+}
+
+static struct abbrev_info *
+dwarf_alloc_abbrev ()
+{
+ struct abbrev_info *abbrev;
+
+ abbrev = xmalloc (sizeof (struct abbrev_info));
+ memset (abbrev, 0, sizeof (struct abbrev_info));
+ return (abbrev);
+}
+
+static struct dwarf_block *
+dwarf_alloc_block ()
+{
+ struct dwarf_block *blk;
+
+ blk = (struct dwarf_block *) xmalloc (sizeof (struct dwarf_block));
+ return (blk);
+}
+
+static struct die_info *
+dwarf_alloc_die ()
+{
+ struct die_info *die;
+
+ die = (struct die_info *) xmalloc (sizeof (struct die_info));
+ memset (die, 0, sizeof (struct die_info));
+ return (die);
+}
projects / external / binutils.git / commitdiff