diff options
| -rw-r--r-- | gdb/ChangeLog | 12 | ||||
| -rw-r--r-- | gdb/Makefile.in | 14 | ||||
| -rw-r--r-- | gdb/dwarf2read.c | 4402 | ||||
| -rw-r--r-- | gdb/elfread.c | 18 | ||||
| -rw-r--r-- | gdb/symfile.h | 7 |
5 files changed, 4448 insertions, 5 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 22ce466..d0fabde 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,15 @@ +Fri Jul 19 14:05:57 1996 Stan Shebs <shebs@andros.cygnus.com> + + * dwarf2read.c: New file, DWARF 2 reader originally contributed by + Brent Benson, with additions by Gary Funck and Jerry Kreuscher. + * Makefile.in (COMMON_OBS): Add dwarf2read.o. + (SFILES): Add dwarf2read.c. + (dwarf2read.o): Add build rule. + * symfile.h (dwarf2_has_info, dwarf2_build_psymtabs): Declare + exported functions. + * elfread.c (elf_symfile_read): Call them. + (elf_symtab_read) [HARRIS_TARGET]: Skip some special symbols. + Thu Jul 18 01:22:01 1996 Geoffrey Noer <noer@cygnus.com> * symfile.c (symfile_bfd_open): diff --git a/gdb/Makefile.in b/gdb/Makefile.in index 4144406..59946e7 100644 --- a/gdb/Makefile.in +++ b/gdb/Makefile.in @@ -352,7 +352,8 @@ TARGET_FLAGS_TO_PASS = \ SFILES = bcache.c blockframe.c breakpoint.c buildsym.c callback.c c-exp.y \ c-lang.c c-typeprint.c c-valprint.c ch-exp.c ch-lang.c \ ch-typeprint.c ch-valprint.c coffread.c command.c complaints.c \ - corefile.c cp-valprint.c dbxread.c demangle.c dwarfread.c \ + corefile.c cp-valprint.c \ + dbxread.c demangle.c dwarfread.c dwarf2read.c \ elfread.c environ.c eval.c expprint.c \ f-exp.y f-lang.c f-typeprint.c f-valprint.c findvar.c \ gdbtypes.c infcmd.c inflow.c infrun.c language.c \ @@ -361,8 +362,9 @@ SFILES = bcache.c blockframe.c breakpoint.c buildsym.c callback.c c-exp.y \ printcmd.c remote.c remote-nrom.c scm-exp.c scm-lang.c scm-valprint.c \ source.c stabsread.c stack.c symfile.c symmisc.c \ symtab.c target.c thread.c top.c \ - typeprint.c utils.c valarith.c valops.c \ - valprint.c values.c serial.c ser-unix.c mdebugread.c os9kread.c + typeprint.c utils.c \ + valarith.c valops.c valprint.c values.c \ + serial.c ser-unix.c mdebugread.c os9kread.c LINTFILES = $(SFILES) $(YYFILES) init.c @@ -467,7 +469,7 @@ COMMON_OBS = version.o blockframe.o breakpoint.o findvar.o stack.o thread.o \ mem-break.o target.o parse.o language.o $(YYOBJ) buildsym.o \ exec.o bcache.o objfiles.o minsyms.o maint.o demangle.o \ dbxread.o coffread.o elfread.o \ - dwarfread.o mipsread.o stabsread.o corefile.o \ + dwarfread.o dwarf2read.o mipsread.o stabsread.o corefile.o \ c-lang.o ch-exp.o ch-lang.o f-lang.o m2-lang.o \ scm-exp.o scm-lang.o scm-valprint.o complaints.o typeprint.o \ c-typeprint.o ch-typeprint.o f-typeprint.o m2-typeprint.o \ @@ -1109,6 +1111,10 @@ dwarfread.o: dwarfread.c $(bfd_h) buildsym.h complaints.h $(defs_h) \ $(expression_h) $(gdbtypes_h) language.h objfiles.h symfile.h \ $(symtab_h) gdb_string.h +dwarf2read.o: dwarf2read.c $(bfd_h) buildsym.h $(defs_h) \ + $(expression_h) $(gdbtypes_h) language.h objfiles.h symfile.h \ + $(symtab_h) gdb_string.h + elfread.o: elfread.c $(bfd_h) buildsym.h complaints.h $(defs_h) \ gdb-stabs.h objfiles.h symfile.h $(symtab_h) gdb_string.h diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c new file mode 100644 index 0000000..7e7891d --- /dev/null +++ b/gdb/dwarf2read.c @@ -0,0 +1,4402 @@ +/* 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); +} diff --git a/gdb/elfread.c b/gdb/elfread.c index 8a757e4..107bdaf 100644 --- a/gdb/elfread.c +++ b/gdb/elfread.c @@ -407,6 +407,17 @@ elf_symtab_read (abfd, addr, objfile, dynamic) should be harmless (but I encourage people to fix this in the assembler instead of adding checks here). */ continue; +#ifdef HARRIS_TARGET + else if (sym->name[0] == '.' && sym->name[1] == '.') + { + /* Looks like a Harris compiler generated label for the + purpose of marking instructions that are relevant to + DWARF dies. The assembler can't get rid of these + because they are relocatable addresses that the + linker needs to resolve. */ + continue; + } +#endif else { ms_type = mst_file_text; @@ -592,7 +603,12 @@ elf_symfile_read (objfile, section_offsets, mainline) special ELF sections. We first have to find them... */ bfd_map_over_sections (abfd, elf_locate_sections, (PTR) &ei); - if (ei.dboffset && ei.lnoffset) + if (dwarf2_has_info (abfd) && !offset) + { + /* DWARF 2 sections */ + dwarf2_build_psymtabs (objfile, section_offsets, mainline); + } + else if (ei.dboffset && ei.lnoffset) { /* DWARF sections */ dwarf_build_psymtabs (objfile, diff --git a/gdb/symfile.h b/gdb/symfile.h index 5921cbb..80a9927 100644 --- a/gdb/symfile.h +++ b/gdb/symfile.h @@ -205,6 +205,13 @@ extern void dwarf_build_psymtabs PARAMS ((struct objfile *, struct section_offsets *, int, file_ptr, unsigned int, file_ptr, unsigned int)); +/* From dwarf2read.c */ + +extern int dwarf2_has_info PARAMS ((bfd *abfd)); + +extern void dwarf2_build_psymtabs PARAMS ((struct objfile *, + struct section_offsets *, + int)); /* From mdebugread.c */ /* Hack to force structures to exist before use in parameter list. */ |