1 /* DWARF 2 debugging format support for GDB.
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
5 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
6 Inc. with support from Florida State University (under contract
7 with the Ada Joint Program Office), and Silicon Graphics, Inc.
8 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
9 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
10 support in dwarfread.c
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 2 of the License, or (at
17 your option) any later version.
19 This program is distributed in the hope that it will be useful, but
20 WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program; if not, write to the Free Software
26 Foundation, Inc., 59 Temple Place - Suite 330,
27 Boston, MA 02111-1307, USA. */
35 #include "elf/dwarf2.h"
38 #include "expression.h"
39 #include "filenames.h" /* for DOSish file names */
42 #include "complaints.h"
44 #include "dwarf2expr.h"
45 #include "dwarf2loc.h"
46 #include "cp-support.h"
49 #include "gdb_string.h"
50 #include "gdb_assert.h"
51 #include <sys/types.h>
53 #ifndef DWARF2_REG_TO_REGNUM
54 #define DWARF2_REG_TO_REGNUM(REG) (REG)
58 /* .debug_info header for a compilation unit
59 Because of alignment constraints, this structure has padding and cannot
60 be mapped directly onto the beginning of the .debug_info section. */
61 typedef struct comp_unit_header
63 unsigned int length; /* length of the .debug_info
65 unsigned short version; /* version number -- 2 for DWARF
67 unsigned int abbrev_offset; /* offset into .debug_abbrev section */
68 unsigned char addr_size; /* byte size of an address -- 4 */
71 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
74 /* .debug_pubnames header
75 Because of alignment constraints, this structure has padding and cannot
76 be mapped directly onto the beginning of the .debug_info section. */
77 typedef struct pubnames_header
79 unsigned int length; /* length of the .debug_pubnames
81 unsigned char version; /* version number -- 2 for DWARF
83 unsigned int info_offset; /* offset into .debug_info section */
84 unsigned int info_size; /* byte size of .debug_info section
88 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
90 /* .debug_pubnames header
91 Because of alignment constraints, this structure has padding and cannot
92 be mapped directly onto the beginning of the .debug_info section. */
93 typedef struct aranges_header
95 unsigned int length; /* byte len of the .debug_aranges
97 unsigned short version; /* version number -- 2 for DWARF
99 unsigned int info_offset; /* offset into .debug_info section */
100 unsigned char addr_size; /* byte size of an address */
101 unsigned char seg_size; /* byte size of segment descriptor */
104 #define _ACTUAL_ARANGES_HEADER_SIZE 12
106 /* .debug_line statement program prologue
107 Because of alignment constraints, this structure has padding and cannot
108 be mapped directly onto the beginning of the .debug_info section. */
109 typedef struct statement_prologue
111 unsigned int total_length; /* byte length of the statement
113 unsigned short version; /* version number -- 2 for DWARF
115 unsigned int prologue_length; /* # bytes between prologue &
117 unsigned char minimum_instruction_length; /* byte size of
119 unsigned char default_is_stmt; /* initial value of is_stmt
122 unsigned char line_range;
123 unsigned char opcode_base; /* number assigned to first special
125 unsigned char *standard_opcode_lengths;
129 /* offsets and sizes of debugging sections */
131 static file_ptr dwarf_info_offset;
132 static file_ptr dwarf_abbrev_offset;
133 static file_ptr dwarf_line_offset;
134 static file_ptr dwarf_pubnames_offset;
135 static file_ptr dwarf_aranges_offset;
136 static file_ptr dwarf_loc_offset;
137 static file_ptr dwarf_macinfo_offset;
138 static file_ptr dwarf_str_offset;
139 static file_ptr dwarf_ranges_offset;
140 file_ptr dwarf_frame_offset;
141 file_ptr dwarf_eh_frame_offset;
143 static unsigned int dwarf_info_size;
144 static unsigned int dwarf_abbrev_size;
145 static unsigned int dwarf_line_size;
146 static unsigned int dwarf_pubnames_size;
147 static unsigned int dwarf_aranges_size;
148 static unsigned int dwarf_loc_size;
149 static unsigned int dwarf_macinfo_size;
150 static unsigned int dwarf_str_size;
151 static unsigned int dwarf_ranges_size;
152 unsigned int dwarf_frame_size;
153 unsigned int dwarf_eh_frame_size;
155 static asection *dwarf_info_section;
156 static asection *dwarf_abbrev_section;
157 static asection *dwarf_line_section;
158 static asection *dwarf_pubnames_section;
159 static asection *dwarf_aranges_section;
160 static asection *dwarf_loc_section;
161 static asection *dwarf_macinfo_section;
162 static asection *dwarf_str_section;
163 static asection *dwarf_ranges_section;
164 asection *dwarf_frame_section;
165 asection *dwarf_eh_frame_section;
167 /* names of the debugging sections */
169 #define INFO_SECTION ".debug_info"
170 #define ABBREV_SECTION ".debug_abbrev"
171 #define LINE_SECTION ".debug_line"
172 #define PUBNAMES_SECTION ".debug_pubnames"
173 #define ARANGES_SECTION ".debug_aranges"
174 #define LOC_SECTION ".debug_loc"
175 #define MACINFO_SECTION ".debug_macinfo"
176 #define STR_SECTION ".debug_str"
177 #define RANGES_SECTION ".debug_ranges"
178 #define FRAME_SECTION ".debug_frame"
179 #define EH_FRAME_SECTION ".eh_frame"
181 /* local data types */
183 /* We hold several abbreviation tables in memory at the same time. */
184 #ifndef ABBREV_HASH_SIZE
185 #define ABBREV_HASH_SIZE 121
188 /* The data in a compilation unit header, after target2host
189 translation, looks like this. */
190 struct comp_unit_head
192 unsigned long length;
194 unsigned int abbrev_offset;
195 unsigned char addr_size;
196 unsigned char signed_addr_p;
197 unsigned int offset_size; /* size of file offsets; either 4 or 8 */
198 unsigned int initial_length_size; /* size of the length field; either
201 /* Offset to the first byte of this compilation unit header in the
202 * .debug_info section, for resolving relative reference dies. */
206 /* Pointer to this compilation unit header in the .debug_info
211 /* Pointer to the first die of this compilatio unit. This will
212 * be the first byte following the compilation unit header. */
216 /* Pointer to the next compilation unit header in the program. */
218 struct comp_unit_head *next;
220 /* DWARF abbreviation table associated with this compilation unit */
222 struct abbrev_info *dwarf2_abbrevs[ABBREV_HASH_SIZE];
224 /* Base address of this compilation unit. */
226 CORE_ADDR base_address;
228 /* Non-zero if base_address has been set. */
233 /* The line number information for a compilation unit (found in the
234 .debug_line section) begins with a "statement program header",
235 which contains the following information. */
238 unsigned int total_length;
239 unsigned short version;
240 unsigned int header_length;
241 unsigned char minimum_instruction_length;
242 unsigned char default_is_stmt;
244 unsigned char line_range;
245 unsigned char opcode_base;
247 /* standard_opcode_lengths[i] is the number of operands for the
248 standard opcode whose value is i. This means that
249 standard_opcode_lengths[0] is unused, and the last meaningful
250 element is standard_opcode_lengths[opcode_base - 1]. */
251 unsigned char *standard_opcode_lengths;
253 /* The include_directories table. NOTE! These strings are not
254 allocated with xmalloc; instead, they are pointers into
255 debug_line_buffer. If you try to free them, `free' will get
257 unsigned int num_include_dirs, include_dirs_size;
260 /* The file_names table. NOTE! These strings are not allocated
261 with xmalloc; instead, they are pointers into debug_line_buffer.
262 Don't try to free them directly. */
263 unsigned int num_file_names, file_names_size;
267 unsigned int dir_index;
268 unsigned int mod_time;
272 /* The start and end of the statement program following this
273 header. These point into dwarf_line_buffer. */
274 char *statement_program_start, *statement_program_end;
277 /* When we construct a partial symbol table entry we only
278 need this much information. */
279 struct partial_die_info
282 unsigned char has_children;
283 unsigned char is_external;
284 unsigned char is_declaration;
285 unsigned char has_type;
292 struct dwarf_block *locdesc;
293 unsigned int language;
297 /* This data structure holds the information of an abbrev. */
300 unsigned int number; /* number identifying abbrev */
301 enum dwarf_tag tag; /* dwarf tag */
302 int has_children; /* boolean */
303 unsigned int num_attrs; /* number of attributes */
304 struct attr_abbrev *attrs; /* an array of attribute descriptions */
305 struct abbrev_info *next; /* next in chain */
310 enum dwarf_attribute name;
311 enum dwarf_form form;
314 /* This data structure holds a complete die structure. */
317 enum dwarf_tag tag; /* Tag indicating type of die */
318 unsigned short has_children; /* Does the die have children */
319 unsigned int abbrev; /* Abbrev number */
320 unsigned int offset; /* Offset in .debug_info section */
321 unsigned int num_attrs; /* Number of attributes */
322 struct attribute *attrs; /* An array of attributes */
323 struct die_info *next_ref; /* Next die in ref hash table */
324 struct die_info *next; /* Next die in linked list */
325 struct type *type; /* Cached type information */
328 /* Attributes have a name and a value */
331 enum dwarf_attribute name;
332 enum dwarf_form form;
336 struct dwarf_block *blk;
344 struct function_range
347 CORE_ADDR lowpc, highpc;
349 struct function_range *next;
352 static struct function_range *cu_first_fn, *cu_last_fn, *cu_cached_fn;
354 /* Get at parts of an attribute structure */
356 #define DW_STRING(attr) ((attr)->u.str)
357 #define DW_UNSND(attr) ((attr)->u.unsnd)
358 #define DW_BLOCK(attr) ((attr)->u.blk)
359 #define DW_SND(attr) ((attr)->u.snd)
360 #define DW_ADDR(attr) ((attr)->u.addr)
362 /* Blocks are a bunch of untyped bytes. */
369 #ifndef ATTR_ALLOC_CHUNK
370 #define ATTR_ALLOC_CHUNK 4
373 /* A hash table of die offsets for following references. */
374 #ifndef REF_HASH_SIZE
375 #define REF_HASH_SIZE 1021
378 static struct die_info *die_ref_table[REF_HASH_SIZE];
380 /* Obstack for allocating temporary storage used during symbol reading. */
381 static struct obstack dwarf2_tmp_obstack;
383 /* Offset to the first byte of the current compilation unit header,
384 for resolving relative reference dies. */
385 static unsigned int cu_header_offset;
387 /* Allocate fields for structs, unions and enums in this size. */
388 #ifndef DW_FIELD_ALLOC_CHUNK
389 #define DW_FIELD_ALLOC_CHUNK 4
392 /* The language we are debugging. */
393 static enum language cu_language;
394 static const struct language_defn *cu_language_defn;
396 /* Actually data from the sections. */
397 static char *dwarf_info_buffer;
398 static char *dwarf_abbrev_buffer;
399 static char *dwarf_line_buffer;
400 static char *dwarf_str_buffer;
401 static char *dwarf_macinfo_buffer;
402 static char *dwarf_ranges_buffer;
403 static char *dwarf_loc_buffer;
405 /* A zeroed version of a partial die for initialization purposes. */
406 static struct partial_die_info zeroed_partial_die;
408 /* The generic symbol table building routines have separate lists for
409 file scope symbols and all all other scopes (local scopes). So
410 we need to select the right one to pass to add_symbol_to_list().
411 We do it by keeping a pointer to the correct list in list_in_scope.
413 FIXME: The original dwarf code just treated the file scope as the first
414 local scope, and all other local scopes as nested local scopes, and worked
415 fine. Check to see if we really need to distinguish these
417 static struct pending **list_in_scope = &file_symbols;
419 /* FIXME: decode_locdesc sets these variables to describe the location
420 to the caller. These ought to be a structure or something. If
421 none of the flags are set, the object lives at the address returned
422 by decode_locdesc. */
424 static int optimized_out; /* No ops in location in expression,
425 so object was optimized out. */
426 static int isreg; /* Object lives in register.
427 decode_locdesc's return value is
428 the register number. */
429 static int offreg; /* Object's address is the sum of the
430 register specified by basereg, plus
431 the offset returned. */
432 static int basereg; /* See `offreg'. */
433 static int isderef; /* Value described by flags above is
434 the address of a pointer to the object. */
435 static int islocal; /* Variable is at the returned offset
436 from the frame start, but there's
437 no identified frame pointer for
438 this function, so we can't say
439 which register it's relative to;
441 static int is_thread_local; /* Variable is at a constant offset in the
442 thread-local storage block for the
443 current thread and the dynamic linker
444 module containing this expression.
445 decode_locdesc returns the offset from
448 /* DW_AT_frame_base values for the current function.
449 frame_base_reg is -1 if DW_AT_frame_base is missing, otherwise it
450 contains the register number for the frame register.
451 frame_base_offset is the offset from the frame register to the
452 virtual stack frame. */
453 static int frame_base_reg;
454 static CORE_ADDR frame_base_offset;
456 /* This value is added to each symbol value. FIXME: Generalize to
457 the section_offsets structure used by dbxread (once this is done,
458 pass the appropriate section number to end_symtab). */
459 static CORE_ADDR baseaddr; /* Add to each symbol value */
461 /* We put a pointer to this structure in the read_symtab_private field
463 The complete dwarf information for an objfile is kept in the
464 psymbol_obstack, so that absolute die references can be handled.
465 Most of the information in this structure is related to an entire
466 object file and could be passed via the sym_private field of the objfile.
467 It is however conceivable that dwarf2 might not be the only type
468 of symbols read from an object file. */
472 /* Pointer to start of dwarf info buffer for the objfile. */
474 char *dwarf_info_buffer;
476 /* Offset in dwarf_info_buffer for this compilation unit. */
478 unsigned long dwarf_info_offset;
480 /* Pointer to start of dwarf abbreviation buffer for the objfile. */
482 char *dwarf_abbrev_buffer;
484 /* Size of dwarf abbreviation section for the objfile. */
486 unsigned int dwarf_abbrev_size;
488 /* Pointer to start of dwarf line buffer for the objfile. */
490 char *dwarf_line_buffer;
492 /* Size of dwarf_line_buffer, in bytes. */
494 unsigned int dwarf_line_size;
496 /* Pointer to start of dwarf string buffer for the objfile. */
498 char *dwarf_str_buffer;
500 /* Size of dwarf string section for the objfile. */
502 unsigned int dwarf_str_size;
504 /* Pointer to start of dwarf macro buffer for the objfile. */
506 char *dwarf_macinfo_buffer;
508 /* Size of dwarf macinfo section for the objfile. */
510 unsigned int dwarf_macinfo_size;
512 /* Pointer to start of dwarf ranges buffer for the objfile. */
514 char *dwarf_ranges_buffer;
516 /* Size of dwarf ranges buffer for the objfile. */
518 unsigned int dwarf_ranges_size;
520 /* Pointer to start of dwarf locations buffer for the objfile. */
522 char *dwarf_loc_buffer;
524 /* Size of dwarf locations buffer for the objfile. */
526 unsigned int dwarf_loc_size;
529 #define PST_PRIVATE(p) ((struct dwarf2_pinfo *)(p)->read_symtab_private)
530 #define DWARF_INFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_info_buffer)
531 #define DWARF_INFO_OFFSET(p) (PST_PRIVATE(p)->dwarf_info_offset)
532 #define DWARF_ABBREV_BUFFER(p) (PST_PRIVATE(p)->dwarf_abbrev_buffer)
533 #define DWARF_ABBREV_SIZE(p) (PST_PRIVATE(p)->dwarf_abbrev_size)
534 #define DWARF_LINE_BUFFER(p) (PST_PRIVATE(p)->dwarf_line_buffer)
535 #define DWARF_LINE_SIZE(p) (PST_PRIVATE(p)->dwarf_line_size)
536 #define DWARF_STR_BUFFER(p) (PST_PRIVATE(p)->dwarf_str_buffer)
537 #define DWARF_STR_SIZE(p) (PST_PRIVATE(p)->dwarf_str_size)
538 #define DWARF_MACINFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_macinfo_buffer)
539 #define DWARF_MACINFO_SIZE(p) (PST_PRIVATE(p)->dwarf_macinfo_size)
540 #define DWARF_RANGES_BUFFER(p) (PST_PRIVATE(p)->dwarf_ranges_buffer)
541 #define DWARF_RANGES_SIZE(p) (PST_PRIVATE(p)->dwarf_ranges_size)
542 #define DWARF_LOC_BUFFER(p) (PST_PRIVATE(p)->dwarf_loc_buffer)
543 #define DWARF_LOC_SIZE(p) (PST_PRIVATE(p)->dwarf_loc_size)
545 /* Maintain an array of referenced fundamental types for the current
546 compilation unit being read. For DWARF version 1, we have to construct
547 the fundamental types on the fly, since no information about the
548 fundamental types is supplied. Each such fundamental type is created by
549 calling a language dependent routine to create the type, and then a
550 pointer to that type is then placed in the array at the index specified
551 by it's FT_<TYPENAME> value. The array has a fixed size set by the
552 FT_NUM_MEMBERS compile time constant, which is the number of predefined
553 fundamental types gdb knows how to construct. */
554 static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */
556 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
557 but this would require a corresponding change in unpack_field_as_long
559 static int bits_per_byte = 8;
561 /* The routines that read and process dies for a C struct or C++ class
562 pass lists of data member fields and lists of member function fields
563 in an instance of a field_info structure, as defined below. */
566 /* List of data member and baseclasses fields. */
569 struct nextfield *next;
576 /* Number of fields. */
579 /* Number of baseclasses. */
582 /* Set if the accesibility of one of the fields is not public. */
583 int non_public_fields;
585 /* Member function fields array, entries are allocated in the order they
586 are encountered in the object file. */
589 struct nextfnfield *next;
590 struct fn_field fnfield;
594 /* Member function fieldlist array, contains name of possibly overloaded
595 member function, number of overloaded member functions and a pointer
596 to the head of the member function field chain. */
601 struct nextfnfield *head;
605 /* Number of entries in the fnfieldlists array. */
609 /* Various complaints about symbol reading that don't abort the process */
612 dwarf2_non_const_array_bound_ignored_complaint (const char *arg1)
614 complaint (&symfile_complaints, "non-constant array bounds form '%s' ignored",
619 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
621 complaint (&symfile_complaints,
622 "statement list doesn't fit in .debug_line section");
626 dwarf2_complex_location_expr_complaint (void)
628 complaint (&symfile_complaints, "location expression too complex");
632 dwarf2_unsupported_at_frame_base_complaint (const char *arg1)
634 complaint (&symfile_complaints,
635 "unsupported DW_AT_frame_base for function '%s'", arg1);
639 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
642 complaint (&symfile_complaints,
643 "const value length mismatch for '%s', got %d, expected %d", arg1,
648 dwarf2_macros_too_long_complaint (void)
650 complaint (&symfile_complaints,
651 "macro info runs off end of `.debug_macinfo' section");
655 dwarf2_macro_malformed_definition_complaint (const char *arg1)
657 complaint (&symfile_complaints,
658 "macro debug info contains a malformed macro definition:\n`%s'",
663 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
665 complaint (&symfile_complaints,
666 "invalid attribute class or form for '%s' in '%s'", arg1, arg2);
669 /* local function prototypes */
671 static void dwarf2_locate_sections (bfd *, asection *, void *);
674 static void dwarf2_build_psymtabs_easy (struct objfile *, int);
677 static void dwarf2_build_psymtabs_hard (struct objfile *, int);
679 static char *scan_partial_symbols (char *, struct objfile *,
680 CORE_ADDR *, CORE_ADDR *,
681 const struct comp_unit_head *);
683 static void add_partial_symbol (struct partial_die_info *, struct objfile *,
684 const struct comp_unit_head *);
686 static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
688 static void psymtab_to_symtab_1 (struct partial_symtab *);
690 char *dwarf2_read_section (struct objfile *, file_ptr, unsigned int,
693 static void dwarf2_read_abbrevs (bfd *abfd, struct comp_unit_head *cu_header);
695 static void dwarf2_empty_abbrev_table (void *);
697 static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
698 const struct comp_unit_head *cu_header);
700 static char *read_partial_die (struct partial_die_info *,
702 const struct comp_unit_head *);
704 static char *read_full_die (struct die_info **, bfd *, char *,
705 const struct comp_unit_head *);
707 static char *read_attribute (struct attribute *, struct attr_abbrev *,
708 bfd *, char *, const struct comp_unit_head *);
710 static char *read_attribute_value (struct attribute *, unsigned,
711 bfd *, char *, const struct comp_unit_head *);
713 static unsigned int read_1_byte (bfd *, char *);
715 static int read_1_signed_byte (bfd *, char *);
717 static unsigned int read_2_bytes (bfd *, char *);
719 static unsigned int read_4_bytes (bfd *, char *);
721 static unsigned long read_8_bytes (bfd *, char *);
723 static CORE_ADDR read_address (bfd *, char *ptr, const struct comp_unit_head *,
726 static LONGEST read_initial_length (bfd *, char *,
727 struct comp_unit_head *, int *bytes_read);
729 static LONGEST read_offset (bfd *, char *, const struct comp_unit_head *,
732 static char *read_n_bytes (bfd *, char *, unsigned int);
734 static char *read_string (bfd *, char *, unsigned int *);
736 static char *read_indirect_string (bfd *, char *, const struct comp_unit_head *,
739 static unsigned long read_unsigned_leb128 (bfd *, char *, unsigned int *);
741 static long read_signed_leb128 (bfd *, char *, unsigned int *);
743 static void set_cu_language (unsigned int);
745 static struct attribute *dwarf_attr (struct die_info *, unsigned int);
747 static int die_is_declaration (struct die_info *);
749 static void free_line_header (struct line_header *lh);
751 static struct line_header *(dwarf_decode_line_header
752 (unsigned int offset,
754 const struct comp_unit_head *cu_header));
756 static void dwarf_decode_lines (struct line_header *, char *, bfd *,
757 const struct comp_unit_head *);
759 static void dwarf2_start_subfile (char *, char *);
761 static struct symbol *new_symbol (struct die_info *, struct type *,
762 struct objfile *, const struct comp_unit_head *);
764 static void dwarf2_const_value (struct attribute *, struct symbol *,
765 struct objfile *, const struct comp_unit_head *);
767 static void dwarf2_const_value_data (struct attribute *attr,
771 static struct type *die_type (struct die_info *, struct objfile *,
772 const struct comp_unit_head *);
774 static struct type *die_containing_type (struct die_info *, struct objfile *,
775 const struct comp_unit_head *);
778 static struct type *type_at_offset (unsigned int, struct objfile *);
781 static struct type *tag_type_to_type (struct die_info *, struct objfile *,
782 const struct comp_unit_head *);
784 static void read_type_die (struct die_info *, struct objfile *,
785 const struct comp_unit_head *);
787 static void read_typedef (struct die_info *, struct objfile *,
788 const struct comp_unit_head *);
790 static void read_base_type (struct die_info *, struct objfile *);
792 static void read_file_scope (struct die_info *, struct objfile *,
793 const struct comp_unit_head *);
795 static void read_func_scope (struct die_info *, struct objfile *,
796 const struct comp_unit_head *);
798 static void read_lexical_block_scope (struct die_info *, struct objfile *,
799 const struct comp_unit_head *);
801 static int dwarf2_get_pc_bounds (struct die_info *,
802 CORE_ADDR *, CORE_ADDR *, struct objfile *,
803 const struct comp_unit_head *);
805 static void dwarf2_add_field (struct field_info *, struct die_info *,
806 struct objfile *, const struct comp_unit_head *);
808 static void dwarf2_attach_fields_to_type (struct field_info *,
809 struct type *, struct objfile *);
811 static void dwarf2_add_member_fn (struct field_info *,
812 struct die_info *, struct type *,
813 struct objfile *objfile,
814 const struct comp_unit_head *);
816 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
817 struct type *, struct objfile *);
819 static void read_structure_scope (struct die_info *, struct objfile *,
820 const struct comp_unit_head *);
822 static void read_common_block (struct die_info *, struct objfile *,
823 const struct comp_unit_head *);
825 static void read_namespace (struct die_info *die, struct objfile *objfile,
826 const struct comp_unit_head *cu_header);
828 static void read_enumeration (struct die_info *, struct objfile *,
829 const struct comp_unit_head *);
831 static struct type *dwarf_base_type (int, int, struct objfile *);
833 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct objfile *,
834 const struct comp_unit_head *);
836 static void read_array_type (struct die_info *, struct objfile *,
837 const struct comp_unit_head *);
839 static void read_tag_pointer_type (struct die_info *, struct objfile *,
840 const struct comp_unit_head *);
842 static void read_tag_ptr_to_member_type (struct die_info *, struct objfile *,
843 const struct comp_unit_head *);
845 static void read_tag_reference_type (struct die_info *, struct objfile *,
846 const struct comp_unit_head *);
848 static void read_tag_const_type (struct die_info *, struct objfile *,
849 const struct comp_unit_head *);
851 static void read_tag_volatile_type (struct die_info *, struct objfile *,
852 const struct comp_unit_head *);
854 static void read_tag_string_type (struct die_info *, struct objfile *);
856 static void read_subroutine_type (struct die_info *, struct objfile *,
857 const struct comp_unit_head *);
859 static struct die_info *read_comp_unit (char *, bfd *,
860 const struct comp_unit_head *);
862 static void free_die_list (struct die_info *);
864 static struct cleanup *make_cleanup_free_die_list (struct die_info *);
866 static void process_die (struct die_info *, struct objfile *,
867 const struct comp_unit_head *);
869 static char *dwarf2_linkage_name (struct die_info *);
871 static char *dwarf2_name (struct die_info *die);
873 static struct die_info *dwarf2_extension (struct die_info *die);
875 static char *dwarf_tag_name (unsigned int);
877 static char *dwarf_attr_name (unsigned int);
879 static char *dwarf_form_name (unsigned int);
881 static char *dwarf_stack_op_name (unsigned int);
883 static char *dwarf_bool_name (unsigned int);
885 static char *dwarf_type_encoding_name (unsigned int);
888 static char *dwarf_cfi_name (unsigned int);
890 struct die_info *copy_die (struct die_info *);
893 static struct die_info *sibling_die (struct die_info *);
895 static void dump_die (struct die_info *);
897 static void dump_die_list (struct die_info *);
899 static void store_in_ref_table (unsigned int, struct die_info *);
901 static void dwarf2_empty_hash_tables (void);
903 static unsigned int dwarf2_get_ref_die_offset (struct attribute *);
905 static struct die_info *follow_die_ref (unsigned int);
907 static struct type *dwarf2_fundamental_type (struct objfile *, int);
909 /* memory allocation interface */
911 static void dwarf2_free_tmp_obstack (void *);
913 static struct dwarf_block *dwarf_alloc_block (void);
915 static struct abbrev_info *dwarf_alloc_abbrev (void);
917 static struct die_info *dwarf_alloc_die (void);
919 static void initialize_cu_func_list (void);
921 static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR);
923 static void dwarf_decode_macros (struct line_header *, unsigned int,
924 char *, bfd *, const struct comp_unit_head *,
927 static int attr_form_is_block (struct attribute *);
930 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
931 const struct comp_unit_head *,
932 struct objfile *objfile);
934 /* Try to locate the sections we need for DWARF 2 debugging
935 information and return true if we have enough to do something. */
938 dwarf2_has_info (bfd *abfd)
940 dwarf_info_offset = 0;
941 dwarf_abbrev_offset = 0;
942 dwarf_line_offset = 0;
943 dwarf_str_offset = 0;
944 dwarf_macinfo_offset = 0;
945 dwarf_frame_offset = 0;
946 dwarf_eh_frame_offset = 0;
947 dwarf_ranges_offset = 0;
948 dwarf_loc_offset = 0;
950 bfd_map_over_sections (abfd, dwarf2_locate_sections, NULL);
951 if (dwarf_info_offset && dwarf_abbrev_offset)
961 /* This function is mapped across the sections and remembers the
962 offset and size of each of the debugging sections we are interested
966 dwarf2_locate_sections (bfd *ignore_abfd, asection *sectp, void *ignore_ptr)
968 if (STREQ (sectp->name, INFO_SECTION))
970 dwarf_info_offset = sectp->filepos;
971 dwarf_info_size = bfd_get_section_size_before_reloc (sectp);
972 dwarf_info_section = sectp;
974 else if (STREQ (sectp->name, ABBREV_SECTION))
976 dwarf_abbrev_offset = sectp->filepos;
977 dwarf_abbrev_size = bfd_get_section_size_before_reloc (sectp);
978 dwarf_abbrev_section = sectp;
980 else if (STREQ (sectp->name, LINE_SECTION))
982 dwarf_line_offset = sectp->filepos;
983 dwarf_line_size = bfd_get_section_size_before_reloc (sectp);
984 dwarf_line_section = sectp;
986 else if (STREQ (sectp->name, PUBNAMES_SECTION))
988 dwarf_pubnames_offset = sectp->filepos;
989 dwarf_pubnames_size = bfd_get_section_size_before_reloc (sectp);
990 dwarf_pubnames_section = sectp;
992 else if (STREQ (sectp->name, ARANGES_SECTION))
994 dwarf_aranges_offset = sectp->filepos;
995 dwarf_aranges_size = bfd_get_section_size_before_reloc (sectp);
996 dwarf_aranges_section = sectp;
998 else if (STREQ (sectp->name, LOC_SECTION))
1000 dwarf_loc_offset = sectp->filepos;
1001 dwarf_loc_size = bfd_get_section_size_before_reloc (sectp);
1002 dwarf_loc_section = sectp;
1004 else if (STREQ (sectp->name, MACINFO_SECTION))
1006 dwarf_macinfo_offset = sectp->filepos;
1007 dwarf_macinfo_size = bfd_get_section_size_before_reloc (sectp);
1008 dwarf_macinfo_section = sectp;
1010 else if (STREQ (sectp->name, STR_SECTION))
1012 dwarf_str_offset = sectp->filepos;
1013 dwarf_str_size = bfd_get_section_size_before_reloc (sectp);
1014 dwarf_str_section = sectp;
1016 else if (STREQ (sectp->name, FRAME_SECTION))
1018 dwarf_frame_offset = sectp->filepos;
1019 dwarf_frame_size = bfd_get_section_size_before_reloc (sectp);
1020 dwarf_frame_section = sectp;
1022 else if (STREQ (sectp->name, EH_FRAME_SECTION))
1024 dwarf_eh_frame_offset = sectp->filepos;
1025 dwarf_eh_frame_size = bfd_get_section_size_before_reloc (sectp);
1026 dwarf_eh_frame_section = sectp;
1028 else if (STREQ (sectp->name, RANGES_SECTION))
1030 dwarf_ranges_offset = sectp->filepos;
1031 dwarf_ranges_size = bfd_get_section_size_before_reloc (sectp);
1032 dwarf_ranges_section = sectp;
1036 /* Build a partial symbol table. */
1039 dwarf2_build_psymtabs (struct objfile *objfile, int mainline)
1042 /* We definitely need the .debug_info and .debug_abbrev sections */
1044 dwarf_info_buffer = dwarf2_read_section (objfile,
1047 dwarf_info_section);
1048 dwarf_abbrev_buffer = dwarf2_read_section (objfile,
1049 dwarf_abbrev_offset,
1051 dwarf_abbrev_section);
1053 if (dwarf_line_offset)
1054 dwarf_line_buffer = dwarf2_read_section (objfile,
1057 dwarf_line_section);
1059 dwarf_line_buffer = NULL;
1061 if (dwarf_str_offset)
1062 dwarf_str_buffer = dwarf2_read_section (objfile,
1067 dwarf_str_buffer = NULL;
1069 if (dwarf_macinfo_offset)
1070 dwarf_macinfo_buffer = dwarf2_read_section (objfile,
1071 dwarf_macinfo_offset,
1073 dwarf_macinfo_section);
1075 dwarf_macinfo_buffer = NULL;
1077 if (dwarf_ranges_offset)
1078 dwarf_ranges_buffer = dwarf2_read_section (objfile,
1079 dwarf_ranges_offset,
1081 dwarf_ranges_section);
1083 dwarf_ranges_buffer = NULL;
1085 if (dwarf_loc_offset)
1086 dwarf_loc_buffer = dwarf2_read_section (objfile,
1091 dwarf_loc_buffer = NULL;
1094 || (objfile->global_psymbols.size == 0
1095 && objfile->static_psymbols.size == 0))
1097 init_psymbol_list (objfile, 1024);
1101 if (dwarf_aranges_offset && dwarf_pubnames_offset)
1103 /* Things are significantly easier if we have .debug_aranges and
1104 .debug_pubnames sections */
1106 dwarf2_build_psymtabs_easy (objfile, mainline);
1110 /* only test this case for now */
1112 /* In this case we have to work a bit harder */
1113 dwarf2_build_psymtabs_hard (objfile, mainline);
1118 /* Build the partial symbol table from the information in the
1119 .debug_pubnames and .debug_aranges sections. */
1122 dwarf2_build_psymtabs_easy (struct objfile *objfile, int mainline)
1124 bfd *abfd = objfile->obfd;
1125 char *aranges_buffer, *pubnames_buffer;
1126 char *aranges_ptr, *pubnames_ptr;
1127 unsigned int entry_length, version, info_offset, info_size;
1129 pubnames_buffer = dwarf2_read_section (objfile,
1130 dwarf_pubnames_offset,
1131 dwarf_pubnames_size,
1132 dwarf_pubnames_section);
1133 pubnames_ptr = pubnames_buffer;
1134 while ((pubnames_ptr - pubnames_buffer) < dwarf_pubnames_size)
1136 struct comp_unit_head cu_header;
1139 entry_length = read_initial_length (abfd, pubnames_ptr, &cu_header,
1141 pubnames_ptr += bytes_read;
1142 version = read_1_byte (abfd, pubnames_ptr);
1144 info_offset = read_4_bytes (abfd, pubnames_ptr);
1146 info_size = read_4_bytes (abfd, pubnames_ptr);
1150 aranges_buffer = dwarf2_read_section (objfile,
1151 dwarf_aranges_offset,
1153 dwarf_aranges_section);
1158 /* Read in the comp unit header information from the debug_info at
1162 read_comp_unit_head (struct comp_unit_head *cu_header,
1163 char *info_ptr, bfd *abfd)
1167 cu_header->length = read_initial_length (abfd, info_ptr, cu_header,
1169 info_ptr += bytes_read;
1170 cu_header->version = read_2_bytes (abfd, info_ptr);
1172 cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
1174 info_ptr += bytes_read;
1175 cu_header->addr_size = read_1_byte (abfd, info_ptr);
1177 signed_addr = bfd_get_sign_extend_vma (abfd);
1178 if (signed_addr < 0)
1179 internal_error (__FILE__, __LINE__,
1180 "read_comp_unit_head: dwarf from non elf file");
1181 cu_header->signed_addr_p = signed_addr;
1185 /* Build the partial symbol table by doing a quick pass through the
1186 .debug_info and .debug_abbrev sections. */
1189 dwarf2_build_psymtabs_hard (struct objfile *objfile, int mainline)
1191 /* Instead of reading this into a big buffer, we should probably use
1192 mmap() on architectures that support it. (FIXME) */
1193 bfd *abfd = objfile->obfd;
1194 char *info_ptr, *abbrev_ptr;
1195 char *beg_of_comp_unit;
1196 struct partial_die_info comp_unit_die;
1197 struct partial_symtab *pst;
1198 struct cleanup *back_to;
1199 CORE_ADDR lowpc, highpc;
1201 info_ptr = dwarf_info_buffer;
1202 abbrev_ptr = dwarf_abbrev_buffer;
1204 /* We use dwarf2_tmp_obstack for objects that don't need to survive
1205 the partial symbol scan, like attribute values.
1207 We could reduce our peak memory consumption during partial symbol
1208 table construction by freeing stuff from this obstack more often
1209 --- say, after processing each compilation unit, or each die ---
1210 but it turns out that this saves almost nothing. For an
1211 executable with 11Mb of Dwarf 2 data, I found about 64k allocated
1212 on dwarf2_tmp_obstack. Some investigation showed:
1214 1) 69% of the attributes used forms DW_FORM_addr, DW_FORM_data*,
1215 DW_FORM_flag, DW_FORM_[su]data, and DW_FORM_ref*. These are
1216 all fixed-length values not requiring dynamic allocation.
1218 2) 30% of the attributes used the form DW_FORM_string. For
1219 DW_FORM_string, read_attribute simply hands back a pointer to
1220 the null-terminated string in dwarf_info_buffer, so no dynamic
1221 allocation is needed there either.
1223 3) The remaining 1% of the attributes all used DW_FORM_block1.
1224 75% of those were DW_AT_frame_base location lists for
1225 functions; the rest were DW_AT_location attributes, probably
1226 for the global variables.
1228 Anyway, what this all means is that the memory the dwarf2
1229 reader uses as temporary space reading partial symbols is about
1230 0.5% as much as we use for dwarf_*_buffer. That's noise. */
1232 obstack_init (&dwarf2_tmp_obstack);
1233 back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL);
1235 /* Since the objects we're extracting from dwarf_info_buffer vary in
1236 length, only the individual functions to extract them (like
1237 read_comp_unit_head and read_partial_die) can really know whether
1238 the buffer is large enough to hold another complete object.
1240 At the moment, they don't actually check that. If
1241 dwarf_info_buffer holds just one extra byte after the last
1242 compilation unit's dies, then read_comp_unit_head will happily
1243 read off the end of the buffer. read_partial_die is similarly
1244 casual. Those functions should be fixed.
1246 For this loop condition, simply checking whether there's any data
1247 left at all should be sufficient. */
1248 while (info_ptr < dwarf_info_buffer + dwarf_info_size)
1250 struct comp_unit_head cu_header;
1251 beg_of_comp_unit = info_ptr;
1252 info_ptr = read_comp_unit_head (&cu_header, info_ptr, abfd);
1254 if (cu_header.version != 2)
1256 error ("Dwarf Error: wrong version in compilation unit header (is %d, should be %d) [in module %s]", cu_header.version, 2, bfd_get_filename (abfd));
1259 if (cu_header.abbrev_offset >= dwarf_abbrev_size)
1261 error ("Dwarf Error: bad offset (0x%lx) in compilation unit header (offset 0x%lx + 6) [in module %s]",
1262 (long) cu_header.abbrev_offset,
1263 (long) (beg_of_comp_unit - dwarf_info_buffer),
1264 bfd_get_filename (abfd));
1267 if (beg_of_comp_unit + cu_header.length + cu_header.initial_length_size
1268 > dwarf_info_buffer + dwarf_info_size)
1270 error ("Dwarf Error: bad length (0x%lx) in compilation unit header (offset 0x%lx + 0) [in module %s]",
1271 (long) cu_header.length,
1272 (long) (beg_of_comp_unit - dwarf_info_buffer),
1273 bfd_get_filename (abfd));
1276 /* Complete the cu_header */
1277 cu_header.offset = beg_of_comp_unit - dwarf_info_buffer;
1278 cu_header.first_die_ptr = info_ptr;
1279 cu_header.cu_head_ptr = beg_of_comp_unit;
1281 /* Read the abbrevs for this compilation unit into a table */
1282 dwarf2_read_abbrevs (abfd, &cu_header);
1283 make_cleanup (dwarf2_empty_abbrev_table, cu_header.dwarf2_abbrevs);
1285 /* Read the compilation unit die */
1286 info_ptr = read_partial_die (&comp_unit_die, abfd, info_ptr,
1289 /* Set the language we're debugging */
1290 set_cu_language (comp_unit_die.language);
1292 /* Allocate a new partial symbol table structure */
1293 pst = start_psymtab_common (objfile, objfile->section_offsets,
1294 comp_unit_die.name ? comp_unit_die.name : "",
1295 comp_unit_die.lowpc,
1296 objfile->global_psymbols.next,
1297 objfile->static_psymbols.next);
1299 pst->read_symtab_private = (char *)
1300 obstack_alloc (&objfile->psymbol_obstack, sizeof (struct dwarf2_pinfo));
1301 cu_header_offset = beg_of_comp_unit - dwarf_info_buffer;
1302 DWARF_INFO_BUFFER (pst) = dwarf_info_buffer;
1303 DWARF_INFO_OFFSET (pst) = beg_of_comp_unit - dwarf_info_buffer;
1304 DWARF_ABBREV_BUFFER (pst) = dwarf_abbrev_buffer;
1305 DWARF_ABBREV_SIZE (pst) = dwarf_abbrev_size;
1306 DWARF_LINE_BUFFER (pst) = dwarf_line_buffer;
1307 DWARF_LINE_SIZE (pst) = dwarf_line_size;
1308 DWARF_STR_BUFFER (pst) = dwarf_str_buffer;
1309 DWARF_STR_SIZE (pst) = dwarf_str_size;
1310 DWARF_MACINFO_BUFFER (pst) = dwarf_macinfo_buffer;
1311 DWARF_MACINFO_SIZE (pst) = dwarf_macinfo_size;
1312 DWARF_RANGES_BUFFER (pst) = dwarf_ranges_buffer;
1313 DWARF_RANGES_SIZE (pst) = dwarf_ranges_size;
1314 DWARF_LOC_BUFFER (pst) = dwarf_loc_buffer;
1315 DWARF_LOC_SIZE (pst) = dwarf_loc_size;
1316 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1318 /* Store the function that reads in the rest of the symbol table */
1319 pst->read_symtab = dwarf2_psymtab_to_symtab;
1321 /* Check if comp unit has_children.
1322 If so, read the rest of the partial symbols from this comp unit.
1323 If not, there's no more debug_info for this comp unit. */
1324 if (comp_unit_die.has_children)
1326 info_ptr = scan_partial_symbols (info_ptr, objfile, &lowpc, &highpc,
1329 /* If the compilation unit didn't have an explicit address range,
1330 then use the information extracted from its child dies. */
1331 if (! comp_unit_die.has_pc_info)
1333 comp_unit_die.lowpc = lowpc;
1334 comp_unit_die.highpc = highpc;
1337 pst->textlow = comp_unit_die.lowpc + baseaddr;
1338 pst->texthigh = comp_unit_die.highpc + baseaddr;
1340 pst->n_global_syms = objfile->global_psymbols.next -
1341 (objfile->global_psymbols.list + pst->globals_offset);
1342 pst->n_static_syms = objfile->static_psymbols.next -
1343 (objfile->static_psymbols.list + pst->statics_offset);
1344 sort_pst_symbols (pst);
1346 /* If there is already a psymtab or symtab for a file of this
1347 name, remove it. (If there is a symtab, more drastic things
1348 also happen.) This happens in VxWorks. */
1349 free_named_symtabs (pst->filename);
1351 info_ptr = beg_of_comp_unit + cu_header.length
1352 + cu_header.initial_length_size;
1354 do_cleanups (back_to);
1357 /* Read in all interesting dies to the end of the compilation unit. */
1360 scan_partial_symbols (char *info_ptr, struct objfile *objfile,
1361 CORE_ADDR *lowpc, CORE_ADDR *highpc,
1362 const struct comp_unit_head *cu_header)
1364 bfd *abfd = objfile->obfd;
1365 struct partial_die_info pdi;
1367 /* This function is called after we've read in the comp_unit_die in
1368 order to read its children. We start the nesting level at 1 since
1369 we have pushed 1 level down in order to read the comp unit's children.
1370 The comp unit itself is at level 0, so we stop reading when we pop
1371 back to that level. */
1373 int nesting_level = 1;
1375 /* We only want to read in symbols corresponding to variables or
1376 other similar objects that are global or static. Normally, these
1377 are all children of the DW_TAG_compile_unit die, so are all at
1378 level 1. But C++ namespaces give ries to DW_TAG_namespace dies
1379 whose children are global objects. So we keep track of what
1380 level we currently think of as referring to file scope; this
1381 should always equal 1 plus the number of namespaces that we are
1382 currently nested within. */
1384 int file_scope_level = 1;
1386 *lowpc = ((CORE_ADDR) -1);
1387 *highpc = ((CORE_ADDR) 0);
1389 while (nesting_level)
1391 info_ptr = read_partial_die (&pdi, abfd, info_ptr, cu_header);
1393 /* Anonymous namespaces have no name but are interesting. */
1395 if (pdi.name != NULL || pdi.tag == DW_TAG_namespace)
1399 case DW_TAG_subprogram:
1400 if (pdi.has_pc_info)
1402 if (pdi.lowpc < *lowpc)
1406 if (pdi.highpc > *highpc)
1408 *highpc = pdi.highpc;
1410 if ((pdi.is_external || nesting_level == file_scope_level)
1411 && !pdi.is_declaration)
1413 add_partial_symbol (&pdi, objfile, cu_header);
1417 case DW_TAG_variable:
1418 case DW_TAG_typedef:
1419 case DW_TAG_class_type:
1420 case DW_TAG_structure_type:
1421 case DW_TAG_union_type:
1422 case DW_TAG_enumeration_type:
1423 if ((pdi.is_external || nesting_level == file_scope_level)
1424 && !pdi.is_declaration)
1426 add_partial_symbol (&pdi, objfile, cu_header);
1429 case DW_TAG_enumerator:
1430 /* File scope enumerators are added to the partial
1431 symbol table. They're children of the enumeration
1432 type die, so they occur at a level one higher than we
1433 normally look for. */
1434 if (nesting_level == file_scope_level + 1)
1435 add_partial_symbol (&pdi, objfile, cu_header);
1437 case DW_TAG_base_type:
1438 /* File scope base type definitions are added to the partial
1440 if (nesting_level == file_scope_level)
1441 add_partial_symbol (&pdi, objfile, cu_header);
1443 case DW_TAG_namespace:
1444 /* FIXME: carlton/2002-10-16: we're not yet doing
1445 anything useful with this, but for now make sure that
1446 these tags at least don't cause us to miss any
1447 important symbols. */
1448 if (pdi.has_children)
1455 /* If the die has a sibling, skip to the sibling. Do not skip
1456 enumeration types, we want to record their enumerators. Do
1457 not skip namespaces, we want to record symbols inside
1460 && pdi.tag != DW_TAG_enumeration_type
1461 && pdi.tag != DW_TAG_namespace)
1463 info_ptr = pdi.sibling;
1465 else if (pdi.has_children)
1467 /* Die has children, but either the optional DW_AT_sibling
1468 attribute is missing or we want to look at them. */
1475 /* If this is the end of a DW_TAG_namespace entry, then
1476 decrease the file_scope_level, too. */
1477 if (nesting_level < file_scope_level)
1480 gdb_assert (nesting_level == file_scope_level);
1485 /* If we didn't find a lowpc, set it to highpc to avoid complaints
1486 from `maint check'. */
1487 if (*lowpc == ((CORE_ADDR) -1))
1493 add_partial_symbol (struct partial_die_info *pdi, struct objfile *objfile,
1494 const struct comp_unit_head *cu_header)
1500 case DW_TAG_subprogram:
1501 if (pdi->is_external)
1503 /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
1504 mst_text, objfile); */
1505 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1506 VAR_DOMAIN, LOC_BLOCK,
1507 &objfile->global_psymbols,
1508 0, pdi->lowpc + baseaddr, cu_language, objfile);
1512 /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
1513 mst_file_text, objfile); */
1514 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1515 VAR_DOMAIN, LOC_BLOCK,
1516 &objfile->static_psymbols,
1517 0, pdi->lowpc + baseaddr, cu_language, objfile);
1520 case DW_TAG_variable:
1521 if (pdi->is_external)
1524 Don't enter into the minimal symbol tables as there is
1525 a minimal symbol table entry from the ELF symbols already.
1526 Enter into partial symbol table if it has a location
1527 descriptor or a type.
1528 If the location descriptor is missing, new_symbol will create
1529 a LOC_UNRESOLVED symbol, the address of the variable will then
1530 be determined from the minimal symbol table whenever the variable
1532 The address for the partial symbol table entry is not
1533 used by GDB, but it comes in handy for debugging partial symbol
1537 addr = decode_locdesc (pdi->locdesc, objfile, cu_header);
1538 if (pdi->locdesc || pdi->has_type)
1539 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1540 VAR_DOMAIN, LOC_STATIC,
1541 &objfile->global_psymbols,
1542 0, addr + baseaddr, cu_language, objfile);
1546 /* Static Variable. Skip symbols without location descriptors. */
1547 if (pdi->locdesc == NULL)
1549 addr = decode_locdesc (pdi->locdesc, objfile, cu_header);
1550 /*prim_record_minimal_symbol (pdi->name, addr + baseaddr,
1551 mst_file_data, objfile); */
1552 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1553 VAR_DOMAIN, LOC_STATIC,
1554 &objfile->static_psymbols,
1555 0, addr + baseaddr, cu_language, objfile);
1558 case DW_TAG_typedef:
1559 case DW_TAG_base_type:
1560 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1561 VAR_DOMAIN, LOC_TYPEDEF,
1562 &objfile->static_psymbols,
1563 0, (CORE_ADDR) 0, cu_language, objfile);
1565 case DW_TAG_class_type:
1566 case DW_TAG_structure_type:
1567 case DW_TAG_union_type:
1568 case DW_TAG_enumeration_type:
1569 /* Skip aggregate types without children, these are external
1571 if (pdi->has_children == 0)
1573 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1574 STRUCT_DOMAIN, LOC_TYPEDEF,
1575 &objfile->static_psymbols,
1576 0, (CORE_ADDR) 0, cu_language, objfile);
1578 if (cu_language == language_cplus)
1580 /* For C++, these implicitly act as typedefs as well. */
1581 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1582 VAR_DOMAIN, LOC_TYPEDEF,
1583 &objfile->static_psymbols,
1584 0, (CORE_ADDR) 0, cu_language, objfile);
1587 case DW_TAG_enumerator:
1588 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1589 VAR_DOMAIN, LOC_CONST,
1590 &objfile->static_psymbols,
1591 0, (CORE_ADDR) 0, cu_language, objfile);
1598 /* Expand this partial symbol table into a full symbol table. */
1601 dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
1603 /* FIXME: This is barely more than a stub. */
1608 warning ("bug: psymtab for %s is already read in.", pst->filename);
1614 printf_filtered ("Reading in symbols for %s...", pst->filename);
1615 gdb_flush (gdb_stdout);
1618 psymtab_to_symtab_1 (pst);
1620 /* Finish up the debug error message. */
1622 printf_filtered ("done.\n");
1628 psymtab_to_symtab_1 (struct partial_symtab *pst)
1630 struct objfile *objfile = pst->objfile;
1631 bfd *abfd = objfile->obfd;
1632 struct comp_unit_head cu_header;
1633 struct die_info *dies;
1634 unsigned long offset;
1635 CORE_ADDR lowpc, highpc;
1636 struct die_info *child_die;
1638 struct symtab *symtab;
1639 struct cleanup *back_to;
1640 struct attribute *attr;
1642 /* Set local variables from the partial symbol table info. */
1643 offset = DWARF_INFO_OFFSET (pst);
1644 dwarf_info_buffer = DWARF_INFO_BUFFER (pst);
1645 dwarf_abbrev_buffer = DWARF_ABBREV_BUFFER (pst);
1646 dwarf_abbrev_size = DWARF_ABBREV_SIZE (pst);
1647 dwarf_line_buffer = DWARF_LINE_BUFFER (pst);
1648 dwarf_line_size = DWARF_LINE_SIZE (pst);
1649 dwarf_str_buffer = DWARF_STR_BUFFER (pst);
1650 dwarf_str_size = DWARF_STR_SIZE (pst);
1651 dwarf_macinfo_buffer = DWARF_MACINFO_BUFFER (pst);
1652 dwarf_macinfo_size = DWARF_MACINFO_SIZE (pst);
1653 dwarf_ranges_buffer = DWARF_RANGES_BUFFER (pst);
1654 dwarf_ranges_size = DWARF_RANGES_SIZE (pst);
1655 dwarf_loc_buffer = DWARF_LOC_BUFFER (pst);
1656 dwarf_loc_size = DWARF_LOC_SIZE (pst);
1657 baseaddr = ANOFFSET (pst->section_offsets, SECT_OFF_TEXT (objfile));
1658 cu_header_offset = offset;
1659 info_ptr = dwarf_info_buffer + offset;
1661 obstack_init (&dwarf2_tmp_obstack);
1662 back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL);
1665 make_cleanup (really_free_pendings, NULL);
1667 /* read in the comp_unit header */
1668 info_ptr = read_comp_unit_head (&cu_header, info_ptr, abfd);
1670 /* Read the abbrevs for this compilation unit */
1671 dwarf2_read_abbrevs (abfd, &cu_header);
1672 make_cleanup (dwarf2_empty_abbrev_table, cu_header.dwarf2_abbrevs);
1674 dies = read_comp_unit (info_ptr, abfd, &cu_header);
1676 make_cleanup_free_die_list (dies);
1678 /* Find the base address of the compilation unit for range lists and
1679 location lists. It will normally be specified by DW_AT_low_pc.
1680 In DWARF-3 draft 4, the base address could be overridden by
1681 DW_AT_entry_pc. It's been removed, but GCC still uses this for
1682 compilation units with discontinuous ranges. */
1684 cu_header.base_known = 0;
1685 cu_header.base_address = 0;
1687 attr = dwarf_attr (dies, DW_AT_entry_pc);
1690 cu_header.base_address = DW_ADDR (attr);
1691 cu_header.base_known = 1;
1695 attr = dwarf_attr (dies, DW_AT_low_pc);
1698 cu_header.base_address = DW_ADDR (attr);
1699 cu_header.base_known = 1;
1703 /* Do line number decoding in read_file_scope () */
1704 process_die (dies, objfile, &cu_header);
1706 if (!dwarf2_get_pc_bounds (dies, &lowpc, &highpc, objfile, &cu_header))
1708 /* Some compilers don't define a DW_AT_high_pc attribute for
1709 the compilation unit. If the DW_AT_high_pc is missing,
1710 synthesize it, by scanning the DIE's below the compilation unit. */
1712 if (dies->has_children)
1714 child_die = dies->next;
1715 while (child_die && child_die->tag)
1717 if (child_die->tag == DW_TAG_subprogram)
1719 CORE_ADDR low, high;
1721 if (dwarf2_get_pc_bounds (child_die, &low, &high,
1722 objfile, &cu_header))
1724 highpc = max (highpc, high);
1727 child_die = sibling_die (child_die);
1731 symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
1733 /* Set symtab language to language from DW_AT_language.
1734 If the compilation is from a C file generated by language preprocessors,
1735 do not set the language if it was already deduced by start_subfile. */
1737 && !(cu_language == language_c && symtab->language != language_c))
1739 symtab->language = cu_language;
1741 pst->symtab = symtab;
1743 sort_symtab_syms (pst->symtab);
1745 do_cleanups (back_to);
1748 /* Process a die and its children. */
1751 process_die (struct die_info *die, struct objfile *objfile,
1752 const struct comp_unit_head *cu_header)
1756 case DW_TAG_padding:
1758 case DW_TAG_compile_unit:
1759 read_file_scope (die, objfile, cu_header);
1761 case DW_TAG_subprogram:
1762 read_subroutine_type (die, objfile, cu_header);
1763 read_func_scope (die, objfile, cu_header);
1765 case DW_TAG_inlined_subroutine:
1766 /* FIXME: These are ignored for now.
1767 They could be used to set breakpoints on all inlined instances
1768 of a function and make GDB `next' properly over inlined functions. */
1770 case DW_TAG_lexical_block:
1771 case DW_TAG_try_block:
1772 case DW_TAG_catch_block:
1773 read_lexical_block_scope (die, objfile, cu_header);
1775 case DW_TAG_class_type:
1776 case DW_TAG_structure_type:
1777 case DW_TAG_union_type:
1778 read_structure_scope (die, objfile, cu_header);
1780 case DW_TAG_enumeration_type:
1781 read_enumeration (die, objfile, cu_header);
1783 case DW_TAG_subroutine_type:
1784 read_subroutine_type (die, objfile, cu_header);
1786 case DW_TAG_array_type:
1787 read_array_type (die, objfile, cu_header);
1789 case DW_TAG_pointer_type:
1790 read_tag_pointer_type (die, objfile, cu_header);
1792 case DW_TAG_ptr_to_member_type:
1793 read_tag_ptr_to_member_type (die, objfile, cu_header);
1795 case DW_TAG_reference_type:
1796 read_tag_reference_type (die, objfile, cu_header);
1798 case DW_TAG_string_type:
1799 read_tag_string_type (die, objfile);
1801 case DW_TAG_base_type:
1802 read_base_type (die, objfile);
1803 if (dwarf_attr (die, DW_AT_name))
1805 /* Add a typedef symbol for the base type definition. */
1806 new_symbol (die, die->type, objfile, cu_header);
1809 case DW_TAG_common_block:
1810 read_common_block (die, objfile, cu_header);
1812 case DW_TAG_common_inclusion:
1814 case DW_TAG_namespace:
1815 if (!processing_has_namespace_info)
1817 processing_has_namespace_info = 1;
1818 processing_current_namespace = "";
1820 read_namespace (die, objfile, cu_header);
1822 case DW_TAG_imported_declaration:
1823 case DW_TAG_imported_module:
1824 /* FIXME: carlton/2002-10-16: Eventually, we should use the
1825 information contained in these. DW_TAG_imported_declaration
1826 dies shouldn't have children; DW_TAG_imported_module dies
1827 shouldn't in the C++ case, but conceivably could in the
1828 Fortran case, so we'll have to replace this gdb_assert if
1829 Fortran compilers start generating that info. */
1830 if (!processing_has_namespace_info)
1832 processing_has_namespace_info = 1;
1833 processing_current_namespace = "";
1835 gdb_assert (!die->has_children);
1838 new_symbol (die, NULL, objfile, cu_header);
1844 initialize_cu_func_list (void)
1846 cu_first_fn = cu_last_fn = cu_cached_fn = NULL;
1850 read_file_scope (struct die_info *die, struct objfile *objfile,
1851 const struct comp_unit_head *cu_header)
1853 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
1854 CORE_ADDR lowpc = ((CORE_ADDR) -1);
1855 CORE_ADDR highpc = ((CORE_ADDR) 0);
1856 struct attribute *attr;
1857 char *name = "<unknown>";
1858 char *comp_dir = NULL;
1859 struct die_info *child_die;
1860 bfd *abfd = objfile->obfd;
1861 struct line_header *line_header = 0;
1863 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile, cu_header))
1865 if (die->has_children)
1867 child_die = die->next;
1868 while (child_die && child_die->tag)
1870 if (child_die->tag == DW_TAG_subprogram)
1872 CORE_ADDR low, high;
1874 if (dwarf2_get_pc_bounds (child_die, &low, &high,
1875 objfile, cu_header))
1877 lowpc = min (lowpc, low);
1878 highpc = max (highpc, high);
1881 child_die = sibling_die (child_die);
1886 /* If we didn't find a lowpc, set it to highpc to avoid complaints
1887 from finish_block. */
1888 if (lowpc == ((CORE_ADDR) -1))
1893 attr = dwarf_attr (die, DW_AT_name);
1896 name = DW_STRING (attr);
1898 attr = dwarf_attr (die, DW_AT_comp_dir);
1901 comp_dir = DW_STRING (attr);
1904 /* Irix 6.2 native cc prepends <machine>.: to the compilation
1905 directory, get rid of it. */
1906 char *cp = strchr (comp_dir, ':');
1908 if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
1913 if (objfile->ei.entry_point >= lowpc &&
1914 objfile->ei.entry_point < highpc)
1916 objfile->ei.entry_file_lowpc = lowpc;
1917 objfile->ei.entry_file_highpc = highpc;
1920 attr = dwarf_attr (die, DW_AT_language);
1923 set_cu_language (DW_UNSND (attr));
1926 /* We assume that we're processing GCC output. */
1927 processing_gcc_compilation = 2;
1929 /* FIXME:Do something here. */
1930 if (dip->at_producer != NULL)
1932 handle_producer (dip->at_producer);
1936 /* The compilation unit may be in a different language or objfile,
1937 zero out all remembered fundamental types. */
1938 memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *));
1940 start_symtab (name, comp_dir, lowpc);
1941 record_debugformat ("DWARF 2");
1943 initialize_cu_func_list ();
1945 /* Process all dies in compilation unit. */
1946 if (die->has_children)
1948 child_die = die->next;
1949 while (child_die && child_die->tag)
1951 process_die (child_die, objfile, cu_header);
1952 child_die = sibling_die (child_die);
1956 /* Decode line number information if present. */
1957 attr = dwarf_attr (die, DW_AT_stmt_list);
1960 unsigned int line_offset = DW_UNSND (attr);
1961 line_header = dwarf_decode_line_header (line_offset,
1965 make_cleanup ((make_cleanup_ftype *) free_line_header,
1966 (void *) line_header);
1967 dwarf_decode_lines (line_header, comp_dir, abfd, cu_header);
1971 /* Decode macro information, if present. Dwarf 2 macro information
1972 refers to information in the line number info statement program
1973 header, so we can only read it if we've read the header
1975 attr = dwarf_attr (die, DW_AT_macro_info);
1976 if (attr && line_header)
1978 unsigned int macro_offset = DW_UNSND (attr);
1979 dwarf_decode_macros (line_header, macro_offset,
1980 comp_dir, abfd, cu_header, objfile);
1982 do_cleanups (back_to);
1986 add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc)
1988 struct function_range *thisfn;
1990 thisfn = (struct function_range *)
1991 obstack_alloc (&dwarf2_tmp_obstack, sizeof (struct function_range));
1992 thisfn->name = name;
1993 thisfn->lowpc = lowpc;
1994 thisfn->highpc = highpc;
1995 thisfn->seen_line = 0;
1996 thisfn->next = NULL;
1998 if (cu_last_fn == NULL)
1999 cu_first_fn = thisfn;
2001 cu_last_fn->next = thisfn;
2003 cu_last_fn = thisfn;
2007 read_func_scope (struct die_info *die, struct objfile *objfile,
2008 const struct comp_unit_head *cu_header)
2010 register struct context_stack *new;
2013 struct die_info *child_die;
2014 struct attribute *attr;
2017 name = dwarf2_linkage_name (die);
2019 /* Ignore functions with missing or empty names and functions with
2020 missing or invalid low and high pc attributes. */
2021 if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile, cu_header))
2027 /* Record the function range for dwarf_decode_lines. */
2028 add_to_cu_func_list (name, lowpc, highpc);
2030 if (objfile->ei.entry_point >= lowpc &&
2031 objfile->ei.entry_point < highpc)
2033 objfile->ei.entry_func_lowpc = lowpc;
2034 objfile->ei.entry_func_highpc = highpc;
2037 /* Decode DW_AT_frame_base location descriptor if present, keep result
2038 for DW_OP_fbreg operands in decode_locdesc. */
2039 frame_base_reg = -1;
2040 frame_base_offset = 0;
2041 attr = dwarf_attr (die, DW_AT_frame_base);
2046 /* Support the .debug_loc offsets */
2047 if (attr_form_is_block (attr))
2049 addr = decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
2051 else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
2053 dwarf2_complex_location_expr_complaint ();
2058 dwarf2_invalid_attrib_class_complaint ("DW_AT_frame_base", name);
2063 dwarf2_unsupported_at_frame_base_complaint (name);
2065 frame_base_reg = addr;
2068 frame_base_reg = basereg;
2069 frame_base_offset = addr;
2072 dwarf2_unsupported_at_frame_base_complaint (name);
2075 new = push_context (0, lowpc);
2076 new->name = new_symbol (die, die->type, objfile, cu_header);
2078 /* If there was a location expression for DW_AT_frame_base above,
2079 record it. We still need to decode it above because not all
2080 symbols use location expressions exclusively. */
2082 dwarf2_symbol_mark_computed (attr, new->name, cu_header, objfile);
2084 list_in_scope = &local_symbols;
2086 if (die->has_children)
2088 child_die = die->next;
2089 while (child_die && child_die->tag)
2091 process_die (child_die, objfile, cu_header);
2092 child_die = sibling_die (child_die);
2096 new = pop_context ();
2097 /* Make a block for the local symbols within. */
2098 finish_block (new->name, &local_symbols, new->old_blocks,
2099 lowpc, highpc, objfile);
2101 /* In C++, we can have functions nested inside functions (e.g., when
2102 a function declares a class that has methods). This means that
2103 when we finish processing a function scope, we may need to go
2104 back to building a containing block's symbol lists. */
2105 local_symbols = new->locals;
2106 param_symbols = new->params;
2108 /* If we've finished processing a top-level function, subsequent
2109 symbols go in the file symbol list. */
2110 if (outermost_context_p ())
2111 list_in_scope = &file_symbols;
2114 /* Process all the DIES contained within a lexical block scope. Start
2115 a new scope, process the dies, and then close the scope. */
2118 read_lexical_block_scope (struct die_info *die, struct objfile *objfile,
2119 const struct comp_unit_head *cu_header)
2121 register struct context_stack *new;
2122 CORE_ADDR lowpc, highpc;
2123 struct die_info *child_die;
2125 /* Ignore blocks with missing or invalid low and high pc attributes. */
2126 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
2127 as multiple lexical blocks? Handling children in a sane way would
2128 be nasty. Might be easier to properly extend generic blocks to
2130 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile, cu_header))
2135 push_context (0, lowpc);
2136 if (die->has_children)
2138 child_die = die->next;
2139 while (child_die && child_die->tag)
2141 process_die (child_die, objfile, cu_header);
2142 child_die = sibling_die (child_die);
2145 new = pop_context ();
2147 if (local_symbols != NULL)
2149 finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
2152 local_symbols = new->locals;
2155 /* Get low and high pc attributes from a die. Return 1 if the attributes
2156 are present and valid, otherwise, return 0. Return -1 if the range is
2157 discontinuous, i.e. derived from DW_AT_ranges information. */
2159 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
2160 CORE_ADDR *highpc, struct objfile *objfile,
2161 const struct comp_unit_head *cu_header)
2163 struct attribute *attr;
2164 bfd *obfd = objfile->obfd;
2169 attr = dwarf_attr (die, DW_AT_high_pc);
2172 high = DW_ADDR (attr);
2173 attr = dwarf_attr (die, DW_AT_low_pc);
2175 low = DW_ADDR (attr);
2177 /* Found high w/o low attribute. */
2180 /* Found consecutive range of addresses. */
2185 attr = dwarf_attr (die, DW_AT_ranges);
2188 unsigned int addr_size = cu_header->addr_size;
2189 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
2190 /* Value of the DW_AT_ranges attribute is the offset in the
2191 .debug_renges section. */
2192 unsigned int offset = DW_UNSND (attr);
2193 /* Base address selection entry. */
2202 found_base = cu_header->base_known;
2203 base = cu_header->base_address;
2204 buffer = dwarf_ranges_buffer + offset;
2206 /* Read in the largest possible address. */
2207 marker = read_address (obfd, buffer, cu_header, &dummy);
2208 if ((marker & mask) == mask)
2210 /* If we found the largest possible address, then
2211 read the base address. */
2212 base = read_address (obfd, buffer + addr_size,
2214 buffer += 2 * addr_size;
2215 offset += 2 * addr_size;
2223 CORE_ADDR range_beginning, range_end;
2225 range_beginning = read_address (obfd, buffer,
2227 buffer += addr_size;
2228 range_end = read_address (obfd, buffer, cu_header, &dummy);
2229 buffer += addr_size;
2230 offset += 2 * addr_size;
2232 /* An end of list marker is a pair of zero addresses. */
2233 if (range_beginning == 0 && range_end == 0)
2234 /* Found the end of list entry. */
2237 /* Each base address selection entry is a pair of 2 values.
2238 The first is the largest possible address, the second is
2239 the base address. Check for a base address here. */
2240 if ((range_beginning & mask) == mask)
2242 /* If we found the largest possible address, then
2243 read the base address. */
2244 base = read_address (obfd, buffer + addr_size,
2252 /* We have no valid base address for the ranges
2254 complaint (&symfile_complaints,
2255 "Invalid .debug_ranges data (no base address)");
2259 range_beginning += base;
2262 /* FIXME: This is recording everything as a low-high
2263 segment of consecutive addresses. We should have a
2264 data structure for discontiguous block ranges
2268 low = range_beginning;
2274 if (range_beginning < low)
2275 low = range_beginning;
2276 if (range_end > high)
2282 /* If the first entry is an end-of-list marker, the range
2283 describes an empty scope, i.e. no instructions. */
2293 /* When using the GNU linker, .gnu.linkonce. sections are used to
2294 eliminate duplicate copies of functions and vtables and such.
2295 The linker will arbitrarily choose one and discard the others.
2296 The AT_*_pc values for such functions refer to local labels in
2297 these sections. If the section from that file was discarded, the
2298 labels are not in the output, so the relocs get a value of 0.
2299 If this is a discarded function, mark the pc bounds as invalid,
2300 so that GDB will ignore it. */
2301 if (low == 0 && (bfd_get_file_flags (obfd) & HAS_RELOC) == 0)
2309 /* Add an aggregate field to the field list. */
2312 dwarf2_add_field (struct field_info *fip, struct die_info *die,
2313 struct objfile *objfile,
2314 const struct comp_unit_head *cu_header)
2316 struct nextfield *new_field;
2317 struct attribute *attr;
2319 char *fieldname = "";
2321 /* Allocate a new field list entry and link it in. */
2322 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
2323 make_cleanup (xfree, new_field);
2324 memset (new_field, 0, sizeof (struct nextfield));
2325 new_field->next = fip->fields;
2326 fip->fields = new_field;
2329 /* Handle accessibility and virtuality of field.
2330 The default accessibility for members is public, the default
2331 accessibility for inheritance is private. */
2332 if (die->tag != DW_TAG_inheritance)
2333 new_field->accessibility = DW_ACCESS_public;
2335 new_field->accessibility = DW_ACCESS_private;
2336 new_field->virtuality = DW_VIRTUALITY_none;
2338 attr = dwarf_attr (die, DW_AT_accessibility);
2340 new_field->accessibility = DW_UNSND (attr);
2341 if (new_field->accessibility != DW_ACCESS_public)
2342 fip->non_public_fields = 1;
2343 attr = dwarf_attr (die, DW_AT_virtuality);
2345 new_field->virtuality = DW_UNSND (attr);
2347 fp = &new_field->field;
2349 if (die->tag == DW_TAG_member && ! die_is_declaration (die))
2351 /* Data member other than a C++ static data member. */
2353 /* Get type of field. */
2354 fp->type = die_type (die, objfile, cu_header);
2356 FIELD_STATIC_KIND (*fp) = 0;
2358 /* Get bit size of field (zero if none). */
2359 attr = dwarf_attr (die, DW_AT_bit_size);
2362 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
2366 FIELD_BITSIZE (*fp) = 0;
2369 /* Get bit offset of field. */
2370 attr = dwarf_attr (die, DW_AT_data_member_location);
2373 FIELD_BITPOS (*fp) =
2374 decode_locdesc (DW_BLOCK (attr), objfile, cu_header) * bits_per_byte;
2377 FIELD_BITPOS (*fp) = 0;
2378 attr = dwarf_attr (die, DW_AT_bit_offset);
2381 if (BITS_BIG_ENDIAN)
2383 /* For big endian bits, the DW_AT_bit_offset gives the
2384 additional bit offset from the MSB of the containing
2385 anonymous object to the MSB of the field. We don't
2386 have to do anything special since we don't need to
2387 know the size of the anonymous object. */
2388 FIELD_BITPOS (*fp) += DW_UNSND (attr);
2392 /* For little endian bits, compute the bit offset to the
2393 MSB of the anonymous object, subtract off the number of
2394 bits from the MSB of the field to the MSB of the
2395 object, and then subtract off the number of bits of
2396 the field itself. The result is the bit offset of
2397 the LSB of the field. */
2399 int bit_offset = DW_UNSND (attr);
2401 attr = dwarf_attr (die, DW_AT_byte_size);
2404 /* The size of the anonymous object containing
2405 the bit field is explicit, so use the
2406 indicated size (in bytes). */
2407 anonymous_size = DW_UNSND (attr);
2411 /* The size of the anonymous object containing
2412 the bit field must be inferred from the type
2413 attribute of the data member containing the
2415 anonymous_size = TYPE_LENGTH (fp->type);
2417 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
2418 - bit_offset - FIELD_BITSIZE (*fp);
2422 /* Get name of field. */
2423 attr = dwarf_attr (die, DW_AT_name);
2424 if (attr && DW_STRING (attr))
2425 fieldname = DW_STRING (attr);
2426 fp->name = obsavestring (fieldname, strlen (fieldname),
2427 &objfile->type_obstack);
2429 /* Change accessibility for artificial fields (e.g. virtual table
2430 pointer or virtual base class pointer) to private. */
2431 if (dwarf_attr (die, DW_AT_artificial))
2433 new_field->accessibility = DW_ACCESS_private;
2434 fip->non_public_fields = 1;
2437 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
2439 /* C++ static member. */
2441 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
2442 is a declaration, but all versions of G++ as of this writing
2443 (so through at least 3.2.1) incorrectly generate
2444 DW_TAG_variable tags. */
2448 /* Get name of field. */
2449 attr = dwarf_attr (die, DW_AT_name);
2450 if (attr && DW_STRING (attr))
2451 fieldname = DW_STRING (attr);
2455 /* Get physical name. */
2456 physname = dwarf2_linkage_name (die);
2458 SET_FIELD_PHYSNAME (*fp, obsavestring (physname, strlen (physname),
2459 &objfile->type_obstack));
2460 FIELD_TYPE (*fp) = die_type (die, objfile, cu_header);
2461 FIELD_NAME (*fp) = obsavestring (fieldname, strlen (fieldname),
2462 &objfile->type_obstack);
2464 else if (die->tag == DW_TAG_inheritance)
2466 /* C++ base class field. */
2467 attr = dwarf_attr (die, DW_AT_data_member_location);
2469 FIELD_BITPOS (*fp) = (decode_locdesc (DW_BLOCK (attr), objfile, cu_header)
2471 FIELD_BITSIZE (*fp) = 0;
2472 FIELD_STATIC_KIND (*fp) = 0;
2473 FIELD_TYPE (*fp) = die_type (die, objfile, cu_header);
2474 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
2475 fip->nbaseclasses++;
2479 /* Create the vector of fields, and attach it to the type. */
2482 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
2483 struct objfile *objfile)
2485 int nfields = fip->nfields;
2487 /* Record the field count, allocate space for the array of fields,
2488 and create blank accessibility bitfields if necessary. */
2489 TYPE_NFIELDS (type) = nfields;
2490 TYPE_FIELDS (type) = (struct field *)
2491 TYPE_ALLOC (type, sizeof (struct field) * nfields);
2492 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
2494 if (fip->non_public_fields)
2496 ALLOCATE_CPLUS_STRUCT_TYPE (type);
2498 TYPE_FIELD_PRIVATE_BITS (type) =
2499 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
2500 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
2502 TYPE_FIELD_PROTECTED_BITS (type) =
2503 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
2504 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
2506 TYPE_FIELD_IGNORE_BITS (type) =
2507 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
2508 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
2511 /* If the type has baseclasses, allocate and clear a bit vector for
2512 TYPE_FIELD_VIRTUAL_BITS. */
2513 if (fip->nbaseclasses)
2515 int num_bytes = B_BYTES (fip->nbaseclasses);
2518 ALLOCATE_CPLUS_STRUCT_TYPE (type);
2519 pointer = (char *) TYPE_ALLOC (type, num_bytes);
2520 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
2521 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
2522 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
2525 /* Copy the saved-up fields into the field vector. Start from the head
2526 of the list, adding to the tail of the field array, so that they end
2527 up in the same order in the array in which they were added to the list. */
2528 while (nfields-- > 0)
2530 TYPE_FIELD (type, nfields) = fip->fields->field;
2531 switch (fip->fields->accessibility)
2533 case DW_ACCESS_private:
2534 SET_TYPE_FIELD_PRIVATE (type, nfields);
2537 case DW_ACCESS_protected:
2538 SET_TYPE_FIELD_PROTECTED (type, nfields);
2541 case DW_ACCESS_public:
2545 /* Unknown accessibility. Complain and treat it as public. */
2547 complaint (&symfile_complaints, "unsupported accessibility %d",
2548 fip->fields->accessibility);
2552 if (nfields < fip->nbaseclasses)
2554 switch (fip->fields->virtuality)
2556 case DW_VIRTUALITY_virtual:
2557 case DW_VIRTUALITY_pure_virtual:
2558 SET_TYPE_FIELD_VIRTUAL (type, nfields);
2562 fip->fields = fip->fields->next;
2566 /* Add a member function to the proper fieldlist. */
2569 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
2570 struct type *type, struct objfile *objfile,
2571 const struct comp_unit_head *cu_header)
2573 struct attribute *attr;
2574 struct fnfieldlist *flp;
2576 struct fn_field *fnp;
2579 struct nextfnfield *new_fnfield;
2581 /* Get name of member function. */
2582 attr = dwarf_attr (die, DW_AT_name);
2583 if (attr && DW_STRING (attr))
2584 fieldname = DW_STRING (attr);
2588 /* Get the mangled name. */
2589 physname = dwarf2_linkage_name (die);
2591 /* Look up member function name in fieldlist. */
2592 for (i = 0; i < fip->nfnfields; i++)
2594 if (STREQ (fip->fnfieldlists[i].name, fieldname))
2598 /* Create new list element if necessary. */
2599 if (i < fip->nfnfields)
2600 flp = &fip->fnfieldlists[i];
2603 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
2605 fip->fnfieldlists = (struct fnfieldlist *)
2606 xrealloc (fip->fnfieldlists,
2607 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
2608 * sizeof (struct fnfieldlist));
2609 if (fip->nfnfields == 0)
2610 make_cleanup (free_current_contents, &fip->fnfieldlists);
2612 flp = &fip->fnfieldlists[fip->nfnfields];
2613 flp->name = fieldname;
2619 /* Create a new member function field and chain it to the field list
2621 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
2622 make_cleanup (xfree, new_fnfield);
2623 memset (new_fnfield, 0, sizeof (struct nextfnfield));
2624 new_fnfield->next = flp->head;
2625 flp->head = new_fnfield;
2628 /* Fill in the member function field info. */
2629 fnp = &new_fnfield->fnfield;
2630 fnp->physname = obsavestring (physname, strlen (physname),
2631 &objfile->type_obstack);
2632 fnp->type = alloc_type (objfile);
2633 if (die->type && TYPE_CODE (die->type) == TYPE_CODE_FUNC)
2635 struct type *return_type = TYPE_TARGET_TYPE (die->type);
2636 int nparams = TYPE_NFIELDS (die->type);
2638 /* TYPE is the domain of this method, and DIE->TYPE is the type
2639 of the method itself (TYPE_CODE_METHOD). */
2640 smash_to_method_type (fnp->type, type,
2641 TYPE_TARGET_TYPE (die->type),
2642 TYPE_FIELDS (die->type),
2643 TYPE_NFIELDS (die->type),
2644 TYPE_VARARGS (die->type));
2646 /* Handle static member functions.
2647 Dwarf2 has no clean way to discern C++ static and non-static
2648 member functions. G++ helps GDB by marking the first
2649 parameter for non-static member functions (which is the
2650 this pointer) as artificial. We obtain this information
2651 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
2652 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (die->type, 0) == 0)
2653 fnp->voffset = VOFFSET_STATIC;
2656 complaint (&symfile_complaints, "member function type missing for '%s'",
2659 /* Get fcontext from DW_AT_containing_type if present. */
2660 if (dwarf_attr (die, DW_AT_containing_type) != NULL)
2661 fnp->fcontext = die_containing_type (die, objfile, cu_header);
2663 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
2664 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
2666 /* Get accessibility. */
2667 attr = dwarf_attr (die, DW_AT_accessibility);
2670 switch (DW_UNSND (attr))
2672 case DW_ACCESS_private:
2673 fnp->is_private = 1;
2675 case DW_ACCESS_protected:
2676 fnp->is_protected = 1;
2681 /* Check for artificial methods. */
2682 attr = dwarf_attr (die, DW_AT_artificial);
2683 if (attr && DW_UNSND (attr) != 0)
2684 fnp->is_artificial = 1;
2686 /* Get index in virtual function table if it is a virtual member function. */
2687 attr = dwarf_attr (die, DW_AT_vtable_elem_location);
2690 /* Support the .debug_loc offsets */
2691 if (attr_form_is_block (attr))
2693 fnp->voffset = decode_locdesc (DW_BLOCK (attr), objfile, cu_header) + 2;
2695 else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
2697 dwarf2_complex_location_expr_complaint ();
2701 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
2707 /* Create the vector of member function fields, and attach it to the type. */
2710 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
2711 struct objfile *objfile)
2713 struct fnfieldlist *flp;
2714 int total_length = 0;
2717 ALLOCATE_CPLUS_STRUCT_TYPE (type);
2718 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
2719 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
2721 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
2723 struct nextfnfield *nfp = flp->head;
2724 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
2727 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
2728 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
2729 fn_flp->fn_fields = (struct fn_field *)
2730 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
2731 for (k = flp->length; (k--, nfp); nfp = nfp->next)
2732 fn_flp->fn_fields[k] = nfp->fnfield;
2734 total_length += flp->length;
2737 TYPE_NFN_FIELDS (type) = fip->nfnfields;
2738 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
2741 /* Called when we find the DIE that starts a structure or union scope
2742 (definition) to process all dies that define the members of the
2745 NOTE: we need to call struct_type regardless of whether or not the
2746 DIE has an at_name attribute, since it might be an anonymous
2747 structure or union. This gets the type entered into our set of
2750 However, if the structure is incomplete (an opaque struct/union)
2751 then suppress creating a symbol table entry for it since gdb only
2752 wants to find the one with the complete definition. Note that if
2753 it is complete, we just call new_symbol, which does it's own
2754 checking about whether the struct/union is anonymous or not (and
2755 suppresses creating a symbol table entry itself). */
2758 read_structure_scope (struct die_info *die, struct objfile *objfile,
2759 const struct comp_unit_head *cu_header)
2762 struct attribute *attr;
2764 type = alloc_type (objfile);
2766 INIT_CPLUS_SPECIFIC (type);
2767 attr = dwarf_attr (die, DW_AT_name);
2768 if (attr && DW_STRING (attr))
2770 TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr),
2771 strlen (DW_STRING (attr)),
2772 &objfile->type_obstack);
2775 if (die->tag == DW_TAG_structure_type)
2777 TYPE_CODE (type) = TYPE_CODE_STRUCT;
2779 else if (die->tag == DW_TAG_union_type)
2781 TYPE_CODE (type) = TYPE_CODE_UNION;
2785 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
2787 TYPE_CODE (type) = TYPE_CODE_CLASS;
2790 attr = dwarf_attr (die, DW_AT_byte_size);
2793 TYPE_LENGTH (type) = DW_UNSND (attr);
2797 TYPE_LENGTH (type) = 0;
2800 /* We need to add the type field to the die immediately so we don't
2801 infinitely recurse when dealing with pointers to the structure
2802 type within the structure itself. */
2805 if (die->has_children && ! die_is_declaration (die))
2807 struct field_info fi;
2808 struct die_info *child_die;
2809 struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
2811 memset (&fi, 0, sizeof (struct field_info));
2813 child_die = die->next;
2815 while (child_die && child_die->tag)
2817 if (child_die->tag == DW_TAG_member
2818 || child_die->tag == DW_TAG_variable)
2820 /* NOTE: carlton/2002-11-05: A C++ static data member
2821 should be a DW_TAG_member that is a declaration, but
2822 all versions of G++ as of this writing (so through at
2823 least 3.2.1) incorrectly generate DW_TAG_variable
2824 tags for them instead. */
2825 dwarf2_add_field (&fi, child_die, objfile, cu_header);
2827 else if (child_die->tag == DW_TAG_subprogram)
2829 /* C++ member function. */
2830 process_die (child_die, objfile, cu_header);
2831 dwarf2_add_member_fn (&fi, child_die, type, objfile, cu_header);
2833 else if (child_die->tag == DW_TAG_inheritance)
2835 /* C++ base class field. */
2836 dwarf2_add_field (&fi, child_die, objfile, cu_header);
2840 process_die (child_die, objfile, cu_header);
2842 child_die = sibling_die (child_die);
2845 /* Attach fields and member functions to the type. */
2847 dwarf2_attach_fields_to_type (&fi, type, objfile);
2850 dwarf2_attach_fn_fields_to_type (&fi, type, objfile);
2852 /* Get the type which refers to the base class (possibly this
2853 class itself) which contains the vtable pointer for the current
2854 class from the DW_AT_containing_type attribute. */
2856 if (dwarf_attr (die, DW_AT_containing_type) != NULL)
2858 struct type *t = die_containing_type (die, objfile, cu_header);
2860 TYPE_VPTR_BASETYPE (type) = t;
2863 static const char vptr_name[] =
2864 {'_', 'v', 'p', 't', 'r', '\0'};
2867 /* Our own class provides vtbl ptr. */
2868 for (i = TYPE_NFIELDS (t) - 1;
2869 i >= TYPE_N_BASECLASSES (t);
2872 char *fieldname = TYPE_FIELD_NAME (t, i);
2874 if (STREQN (fieldname, vptr_name, strlen (vptr_name) - 1)
2875 && is_cplus_marker (fieldname[strlen (vptr_name)]))
2877 TYPE_VPTR_FIELDNO (type) = i;
2882 /* Complain if virtual function table field not found. */
2883 if (i < TYPE_N_BASECLASSES (t))
2884 complaint (&symfile_complaints,
2885 "virtual function table pointer not found when defining class '%s'",
2886 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
2891 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
2896 new_symbol (die, type, objfile, cu_header);
2898 do_cleanups (back_to);
2902 /* No children, must be stub. */
2903 TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
2907 /* Given a pointer to a die which begins an enumeration, process all
2908 the dies that define the members of the enumeration.
2910 This will be much nicer in draft 6 of the DWARF spec when our
2911 members will be dies instead squished into the DW_AT_element_list
2914 NOTE: We reverse the order of the element list. */
2917 read_enumeration (struct die_info *die, struct objfile *objfile,
2918 const struct comp_unit_head *cu_header)
2920 struct die_info *child_die;
2922 struct field *fields;
2923 struct attribute *attr;
2926 int unsigned_enum = 1;
2928 type = alloc_type (objfile);
2930 TYPE_CODE (type) = TYPE_CODE_ENUM;
2931 attr = dwarf_attr (die, DW_AT_name);
2932 if (attr && DW_STRING (attr))
2934 TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr),
2935 strlen (DW_STRING (attr)),
2936 &objfile->type_obstack);
2939 attr = dwarf_attr (die, DW_AT_byte_size);
2942 TYPE_LENGTH (type) = DW_UNSND (attr);
2946 TYPE_LENGTH (type) = 0;
2951 if (die->has_children)
2953 child_die = die->next;
2954 while (child_die && child_die->tag)
2956 if (child_die->tag != DW_TAG_enumerator)
2958 process_die (child_die, objfile, cu_header);
2962 attr = dwarf_attr (child_die, DW_AT_name);
2965 sym = new_symbol (child_die, type, objfile, cu_header);
2966 if (SYMBOL_VALUE (sym) < 0)
2969 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
2971 fields = (struct field *)
2973 (num_fields + DW_FIELD_ALLOC_CHUNK)
2974 * sizeof (struct field));
2977 FIELD_NAME (fields[num_fields]) = DEPRECATED_SYMBOL_NAME (sym);
2978 FIELD_TYPE (fields[num_fields]) = NULL;
2979 FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym);
2980 FIELD_BITSIZE (fields[num_fields]) = 0;
2981 FIELD_STATIC_KIND (fields[num_fields]) = 0;
2987 child_die = sibling_die (child_die);
2992 TYPE_NFIELDS (type) = num_fields;
2993 TYPE_FIELDS (type) = (struct field *)
2994 TYPE_ALLOC (type, sizeof (struct field) * num_fields);
2995 memcpy (TYPE_FIELDS (type), fields,
2996 sizeof (struct field) * num_fields);
3000 TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED;
3003 new_symbol (die, type, objfile, cu_header);
3006 /* Extract all information from a DW_TAG_array_type DIE and put it in
3007 the DIE's type field. For now, this only handles one dimensional
3011 read_array_type (struct die_info *die, struct objfile *objfile,
3012 const struct comp_unit_head *cu_header)
3014 struct die_info *child_die;
3015 struct type *type = NULL;
3016 struct type *element_type, *range_type, *index_type;
3017 struct type **range_types = NULL;
3018 struct attribute *attr;
3020 struct cleanup *back_to;
3022 /* Return if we've already decoded this type. */
3028 element_type = die_type (die, objfile, cu_header);
3030 /* Irix 6.2 native cc creates array types without children for
3031 arrays with unspecified length. */
3032 if (die->has_children == 0)
3034 index_type = dwarf2_fundamental_type (objfile, FT_INTEGER);
3035 range_type = create_range_type (NULL, index_type, 0, -1);
3036 die->type = create_array_type (NULL, element_type, range_type);
3040 back_to = make_cleanup (null_cleanup, NULL);
3041 child_die = die->next;
3042 while (child_die && child_die->tag)
3044 if (child_die->tag == DW_TAG_subrange_type)
3046 unsigned int low, high;
3048 /* Default bounds to an array with unspecified length. */
3051 if (cu_language == language_fortran)
3053 /* FORTRAN implies a lower bound of 1, if not given. */
3057 index_type = die_type (child_die, objfile, cu_header);
3058 attr = dwarf_attr (child_die, DW_AT_lower_bound);
3061 if (attr->form == DW_FORM_sdata)
3063 low = DW_SND (attr);
3065 else if (attr->form == DW_FORM_udata
3066 || attr->form == DW_FORM_data1
3067 || attr->form == DW_FORM_data2
3068 || attr->form == DW_FORM_data4
3069 || attr->form == DW_FORM_data8)
3071 low = DW_UNSND (attr);
3075 dwarf2_non_const_array_bound_ignored_complaint
3076 (dwarf_form_name (attr->form));
3078 die->type = lookup_pointer_type (element_type);
3085 attr = dwarf_attr (child_die, DW_AT_upper_bound);
3088 if (attr->form == DW_FORM_sdata)
3090 high = DW_SND (attr);
3092 else if (attr->form == DW_FORM_udata
3093 || attr->form == DW_FORM_data1
3094 || attr->form == DW_FORM_data2
3095 || attr->form == DW_FORM_data4
3096 || attr->form == DW_FORM_data8)
3098 high = DW_UNSND (attr);
3100 else if (attr->form == DW_FORM_block1)
3102 /* GCC encodes arrays with unspecified or dynamic length
3103 with a DW_FORM_block1 attribute.
3104 FIXME: GDB does not yet know how to handle dynamic
3105 arrays properly, treat them as arrays with unspecified
3111 dwarf2_non_const_array_bound_ignored_complaint
3112 (dwarf_form_name (attr->form));
3114 die->type = lookup_pointer_type (element_type);
3122 /* Create a range type and save it for array type creation. */
3123 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
3125 range_types = (struct type **)
3126 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
3127 * sizeof (struct type *));
3129 make_cleanup (free_current_contents, &range_types);
3131 range_types[ndim++] = create_range_type (NULL, index_type, low, high);
3133 child_die = sibling_die (child_die);
3136 /* Dwarf2 dimensions are output from left to right, create the
3137 necessary array types in backwards order. */
3138 type = element_type;
3140 type = create_array_type (NULL, type, range_types[ndim]);
3142 /* Understand Dwarf2 support for vector types (like they occur on
3143 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
3144 array type. This is not part of the Dwarf2/3 standard yet, but a
3145 custom vendor extension. The main difference between a regular
3146 array and the vector variant is that vectors are passed by value
3148 attr = dwarf_attr (die, DW_AT_GNU_vector);
3150 TYPE_FLAGS (type) |= TYPE_FLAG_VECTOR;
3152 do_cleanups (back_to);
3154 /* Install the type in the die. */
3158 /* First cut: install each common block member as a global variable. */
3161 read_common_block (struct die_info *die, struct objfile *objfile,
3162 const struct comp_unit_head *cu_header)
3164 struct die_info *child_die;
3165 struct attribute *attr;
3167 CORE_ADDR base = (CORE_ADDR) 0;
3169 attr = dwarf_attr (die, DW_AT_location);
3172 /* Support the .debug_loc offsets */
3173 if (attr_form_is_block (attr))
3175 base = decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
3177 else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
3179 dwarf2_complex_location_expr_complaint ();
3183 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
3184 "common block member");
3187 if (die->has_children)
3189 child_die = die->next;
3190 while (child_die && child_die->tag)
3192 sym = new_symbol (child_die, NULL, objfile, cu_header);
3193 attr = dwarf_attr (child_die, DW_AT_data_member_location);
3196 SYMBOL_VALUE_ADDRESS (sym) =
3197 base + decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
3198 add_symbol_to_list (sym, &global_symbols);
3200 child_die = sibling_die (child_die);
3205 /* Read a C++ namespace. */
3208 read_namespace (struct die_info *die, struct objfile *objfile,
3209 const struct comp_unit_head *cu_header)
3211 const char *previous_namespace = processing_current_namespace;
3212 const char *name = NULL;
3214 struct die_info *current_die;
3216 /* Loop through the extensions until we find a name. */
3218 for (current_die = die;
3219 current_die != NULL;
3220 current_die = dwarf2_extension (die))
3222 name = dwarf2_name (current_die);
3227 /* Is it an anonymous namespace? */
3229 is_anonymous = (name == NULL);
3231 name = "(anonymous namespace)";
3233 /* Now build the name of the current namespace. */
3235 if (previous_namespace[0] == '\0')
3237 processing_current_namespace = name;
3241 /* We need temp_name around because processing_current_namespace
3242 is a const char *. */
3243 char *temp_name = alloca (strlen (previous_namespace)
3244 + 2 + strlen(name) + 1);
3245 strcpy (temp_name, previous_namespace);
3246 strcat (temp_name, "::");
3247 strcat (temp_name, name);
3249 processing_current_namespace = temp_name;
3252 /* If it's an anonymous namespace that we're seeing for the first
3253 time, add a using directive. */
3255 if (is_anonymous && dwarf_attr (die, DW_AT_extension) == NULL)
3256 cp_add_using_directive (processing_current_namespace,
3257 strlen (previous_namespace),
3258 strlen (processing_current_namespace));
3260 if (die->has_children)
3262 struct die_info *child_die = die->next;
3264 while (child_die && child_die->tag)
3266 process_die (child_die, objfile, cu_header);
3267 child_die = sibling_die (child_die);
3271 processing_current_namespace = previous_namespace;
3274 /* Extract all information from a DW_TAG_pointer_type DIE and add to
3275 the user defined type vector. */
3278 read_tag_pointer_type (struct die_info *die, struct objfile *objfile,
3279 const struct comp_unit_head *cu_header)
3282 struct attribute *attr_byte_size;
3283 struct attribute *attr_address_class;
3284 int byte_size, addr_class;
3291 type = lookup_pointer_type (die_type (die, objfile, cu_header));
3293 attr_byte_size = dwarf_attr (die, DW_AT_byte_size);
3295 byte_size = DW_UNSND (attr_byte_size);
3297 byte_size = cu_header->addr_size;
3299 attr_address_class = dwarf_attr (die, DW_AT_address_class);
3300 if (attr_address_class)
3301 addr_class = DW_UNSND (attr_address_class);
3303 addr_class = DW_ADDR_none;
3305 /* If the pointer size or address class is different than the
3306 default, create a type variant marked as such and set the
3307 length accordingly. */
3308 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
3310 if (ADDRESS_CLASS_TYPE_FLAGS_P ())
3314 type_flags = ADDRESS_CLASS_TYPE_FLAGS (byte_size, addr_class);
3315 gdb_assert ((type_flags & ~TYPE_FLAG_ADDRESS_CLASS_ALL) == 0);
3316 type = make_type_with_address_space (type, type_flags);
3318 else if (TYPE_LENGTH (type) != byte_size)
3320 complaint (&symfile_complaints, "invalid pointer size %d", byte_size);
3323 /* Should we also complain about unhandled address classes? */
3327 TYPE_LENGTH (type) = byte_size;
3331 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
3332 the user defined type vector. */
3335 read_tag_ptr_to_member_type (struct die_info *die, struct objfile *objfile,
3336 const struct comp_unit_head *cu_header)
3339 struct type *to_type;
3340 struct type *domain;
3347 type = alloc_type (objfile);
3348 to_type = die_type (die, objfile, cu_header);
3349 domain = die_containing_type (die, objfile, cu_header);
3350 smash_to_member_type (type, domain, to_type);
3355 /* Extract all information from a DW_TAG_reference_type DIE and add to
3356 the user defined type vector. */
3359 read_tag_reference_type (struct die_info *die, struct objfile *objfile,
3360 const struct comp_unit_head *cu_header)
3363 struct attribute *attr;
3370 type = lookup_reference_type (die_type (die, objfile, cu_header));
3371 attr = dwarf_attr (die, DW_AT_byte_size);
3374 TYPE_LENGTH (type) = DW_UNSND (attr);
3378 TYPE_LENGTH (type) = cu_header->addr_size;
3384 read_tag_const_type (struct die_info *die, struct objfile *objfile,
3385 const struct comp_unit_head *cu_header)
3387 struct type *base_type;
3394 base_type = die_type (die, objfile, cu_header);
3395 die->type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
3399 read_tag_volatile_type (struct die_info *die, struct objfile *objfile,
3400 const struct comp_unit_head *cu_header)
3402 struct type *base_type;
3409 base_type = die_type (die, objfile, cu_header);
3410 die->type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
3413 /* Extract all information from a DW_TAG_string_type DIE and add to
3414 the user defined type vector. It isn't really a user defined type,
3415 but it behaves like one, with other DIE's using an AT_user_def_type
3416 attribute to reference it. */
3419 read_tag_string_type (struct die_info *die, struct objfile *objfile)
3421 struct type *type, *range_type, *index_type, *char_type;
3422 struct attribute *attr;
3423 unsigned int length;
3430 attr = dwarf_attr (die, DW_AT_string_length);
3433 length = DW_UNSND (attr);
3437 /* check for the DW_AT_byte_size attribute */
3438 attr = dwarf_attr (die, DW_AT_byte_size);
3441 length = DW_UNSND (attr);
3448 index_type = dwarf2_fundamental_type (objfile, FT_INTEGER);
3449 range_type = create_range_type (NULL, index_type, 1, length);
3450 if (cu_language == language_fortran)
3452 /* Need to create a unique string type for bounds
3454 type = create_string_type (0, range_type);
3458 char_type = dwarf2_fundamental_type (objfile, FT_CHAR);
3459 type = create_string_type (char_type, range_type);
3464 /* Handle DIES due to C code like:
3468 int (*funcp)(int a, long l);
3472 ('funcp' generates a DW_TAG_subroutine_type DIE)
3476 read_subroutine_type (struct die_info *die, struct objfile *objfile,
3477 const struct comp_unit_head *cu_header)
3479 struct type *type; /* Type that this function returns */
3480 struct type *ftype; /* Function that returns above type */
3481 struct attribute *attr;
3483 /* Decode the type that this subroutine returns */
3488 type = die_type (die, objfile, cu_header);
3489 ftype = lookup_function_type (type);
3491 /* All functions in C++ have prototypes. */
3492 attr = dwarf_attr (die, DW_AT_prototyped);
3493 if ((attr && (DW_UNSND (attr) != 0))
3494 || cu_language == language_cplus)
3495 TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED;
3497 if (die->has_children)
3499 struct die_info *child_die;
3503 /* Count the number of parameters.
3504 FIXME: GDB currently ignores vararg functions, but knows about
3505 vararg member functions. */
3506 child_die = die->next;
3507 while (child_die && child_die->tag)
3509 if (child_die->tag == DW_TAG_formal_parameter)
3511 else if (child_die->tag == DW_TAG_unspecified_parameters)
3512 TYPE_FLAGS (ftype) |= TYPE_FLAG_VARARGS;
3513 child_die = sibling_die (child_die);
3516 /* Allocate storage for parameters and fill them in. */
3517 TYPE_NFIELDS (ftype) = nparams;
3518 TYPE_FIELDS (ftype) = (struct field *)
3519 TYPE_ALLOC (ftype, nparams * sizeof (struct field));
3521 child_die = die->next;
3522 while (child_die && child_die->tag)
3524 if (child_die->tag == DW_TAG_formal_parameter)
3526 /* Dwarf2 has no clean way to discern C++ static and non-static
3527 member functions. G++ helps GDB by marking the first
3528 parameter for non-static member functions (which is the
3529 this pointer) as artificial. We pass this information
3530 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
3531 attr = dwarf_attr (child_die, DW_AT_artificial);
3533 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
3535 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
3536 TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, objfile,
3540 child_die = sibling_die (child_die);
3548 read_typedef (struct die_info *die, struct objfile *objfile,
3549 const struct comp_unit_head *cu_header)
3551 struct attribute *attr;
3556 attr = dwarf_attr (die, DW_AT_name);
3557 if (attr && DW_STRING (attr))
3559 name = DW_STRING (attr);
3561 die->type = init_type (TYPE_CODE_TYPEDEF, 0, TYPE_FLAG_TARGET_STUB, name, objfile);
3562 TYPE_TARGET_TYPE (die->type) = die_type (die, objfile, cu_header);
3566 /* Find a representation of a given base type and install
3567 it in the TYPE field of the die. */
3570 read_base_type (struct die_info *die, struct objfile *objfile)
3573 struct attribute *attr;
3574 int encoding = 0, size = 0;
3576 /* If we've already decoded this die, this is a no-op. */
3582 attr = dwarf_attr (die, DW_AT_encoding);
3585 encoding = DW_UNSND (attr);
3587 attr = dwarf_attr (die, DW_AT_byte_size);
3590 size = DW_UNSND (attr);
3592 attr = dwarf_attr (die, DW_AT_name);
3593 if (attr && DW_STRING (attr))
3595 enum type_code code = TYPE_CODE_INT;
3600 case DW_ATE_address:
3601 /* Turn DW_ATE_address into a void * pointer. */
3602 code = TYPE_CODE_PTR;
3603 type_flags |= TYPE_FLAG_UNSIGNED;
3605 case DW_ATE_boolean:
3606 code = TYPE_CODE_BOOL;
3607 type_flags |= TYPE_FLAG_UNSIGNED;
3609 case DW_ATE_complex_float:
3610 code = TYPE_CODE_COMPLEX;
3613 code = TYPE_CODE_FLT;
3616 case DW_ATE_signed_char:
3618 case DW_ATE_unsigned:
3619 case DW_ATE_unsigned_char:
3620 type_flags |= TYPE_FLAG_UNSIGNED;
3623 complaint (&symfile_complaints, "unsupported DW_AT_encoding: '%s'",
3624 dwarf_type_encoding_name (encoding));
3627 type = init_type (code, size, type_flags, DW_STRING (attr), objfile);
3628 if (encoding == DW_ATE_address)
3629 TYPE_TARGET_TYPE (type) = dwarf2_fundamental_type (objfile, FT_VOID);
3630 else if (encoding == DW_ATE_complex_float)
3633 TYPE_TARGET_TYPE (type)
3634 = dwarf2_fundamental_type (objfile, FT_EXT_PREC_FLOAT);
3635 else if (size == 16)
3636 TYPE_TARGET_TYPE (type)
3637 = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT);
3639 TYPE_TARGET_TYPE (type)
3640 = dwarf2_fundamental_type (objfile, FT_FLOAT);
3645 type = dwarf_base_type (encoding, size, objfile);
3650 /* Read a whole compilation unit into a linked list of dies. */
3652 static struct die_info *
3653 read_comp_unit (char *info_ptr, bfd *abfd,
3654 const struct comp_unit_head *cu_header)
3656 struct die_info *first_die, *last_die, *die;
3660 /* Reset die reference table; we are
3661 building new ones now. */
3662 dwarf2_empty_hash_tables ();
3666 first_die = last_die = NULL;
3669 cur_ptr = read_full_die (&die, abfd, cur_ptr, cu_header);
3670 if (die->has_children)
3681 /* Enter die in reference hash table */
3682 store_in_ref_table (die->offset, die);
3686 first_die = last_die = die;
3690 last_die->next = die;
3694 while (nesting_level > 0);
3698 /* Free a linked list of dies. */
3701 free_die_list (struct die_info *dies)
3703 struct die_info *die, *next;
3716 do_free_die_list_cleanup (void *dies)
3718 free_die_list (dies);
3721 static struct cleanup *
3722 make_cleanup_free_die_list (struct die_info *dies)
3724 return make_cleanup (do_free_die_list_cleanup, dies);
3728 /* Read the contents of the section at OFFSET and of size SIZE from the
3729 object file specified by OBJFILE into the psymbol_obstack and return it. */
3732 dwarf2_read_section (struct objfile *objfile, file_ptr offset,
3733 unsigned int size, asection *sectp)
3735 bfd *abfd = objfile->obfd;
3741 buf = (char *) obstack_alloc (&objfile->psymbol_obstack, size);
3743 = (char *) symfile_relocate_debug_section (abfd, sectp, (bfd_byte *) buf);
3747 if ((bfd_seek (abfd, offset, SEEK_SET) != 0) ||
3748 (bfd_bread (buf, size, abfd) != size))
3751 error ("Dwarf Error: Can't read DWARF data from '%s'",
3752 bfd_get_filename (abfd));
3757 /* In DWARF version 2, the description of the debugging information is
3758 stored in a separate .debug_abbrev section. Before we read any
3759 dies from a section we read in all abbreviations and install them
3763 dwarf2_read_abbrevs (bfd *abfd, struct comp_unit_head *cu_header)
3766 struct abbrev_info *cur_abbrev;
3767 unsigned int abbrev_number, bytes_read, abbrev_name;
3768 unsigned int abbrev_form, hash_number;
3770 /* Initialize dwarf2 abbrevs */
3771 memset (cu_header->dwarf2_abbrevs, 0,
3772 ABBREV_HASH_SIZE*sizeof (struct abbrev_info *));
3774 abbrev_ptr = dwarf_abbrev_buffer + cu_header->abbrev_offset;
3775 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3776 abbrev_ptr += bytes_read;
3778 /* loop until we reach an abbrev number of 0 */
3779 while (abbrev_number)
3781 cur_abbrev = dwarf_alloc_abbrev ();
3783 /* read in abbrev header */
3784 cur_abbrev->number = abbrev_number;
3785 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3786 abbrev_ptr += bytes_read;
3787 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
3790 /* now read in declarations */
3791 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3792 abbrev_ptr += bytes_read;
3793 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3794 abbrev_ptr += bytes_read;
3797 if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0)
3799 cur_abbrev->attrs = (struct attr_abbrev *)
3800 xrealloc (cur_abbrev->attrs,
3801 (cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK)
3802 * sizeof (struct attr_abbrev));
3804 cur_abbrev->attrs[cur_abbrev->num_attrs].name = abbrev_name;
3805 cur_abbrev->attrs[cur_abbrev->num_attrs++].form = abbrev_form;
3806 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3807 abbrev_ptr += bytes_read;
3808 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3809 abbrev_ptr += bytes_read;
3812 hash_number = abbrev_number % ABBREV_HASH_SIZE;
3813 cur_abbrev->next = cu_header->dwarf2_abbrevs[hash_number];
3814 cu_header->dwarf2_abbrevs[hash_number] = cur_abbrev;
3816 /* Get next abbreviation.
3817 Under Irix6 the abbreviations for a compilation unit are not
3818 always properly terminated with an abbrev number of 0.
3819 Exit loop if we encounter an abbreviation which we have
3820 already read (which means we are about to read the abbreviations
3821 for the next compile unit) or if the end of the abbreviation
3822 table is reached. */
3823 if ((unsigned int) (abbrev_ptr - dwarf_abbrev_buffer)
3824 >= dwarf_abbrev_size)
3826 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3827 abbrev_ptr += bytes_read;
3828 if (dwarf2_lookup_abbrev (abbrev_number, cu_header) != NULL)
3833 /* Empty the abbrev table for a new compilation unit. */
3837 dwarf2_empty_abbrev_table (void *ptr_to_abbrevs_table)
3840 struct abbrev_info *abbrev, *next;
3841 struct abbrev_info **abbrevs;
3843 abbrevs = (struct abbrev_info **)ptr_to_abbrevs_table;
3845 for (i = 0; i < ABBREV_HASH_SIZE; ++i)
3848 abbrev = abbrevs[i];
3851 next = abbrev->next;
3852 xfree (abbrev->attrs);
3860 /* Lookup an abbrev_info structure in the abbrev hash table. */
3862 static struct abbrev_info *
3863 dwarf2_lookup_abbrev (unsigned int number, const struct comp_unit_head *cu_header)
3865 unsigned int hash_number;
3866 struct abbrev_info *abbrev;
3868 hash_number = number % ABBREV_HASH_SIZE;
3869 abbrev = cu_header->dwarf2_abbrevs[hash_number];
3873 if (abbrev->number == number)
3876 abbrev = abbrev->next;
3881 /* Read a minimal amount of information into the minimal die structure. */
3884 read_partial_die (struct partial_die_info *part_die, bfd *abfd,
3885 char *info_ptr, const struct comp_unit_head *cu_header)
3887 unsigned int abbrev_number, bytes_read, i;
3888 struct abbrev_info *abbrev;
3889 struct attribute attr;
3890 struct attribute spec_attr;
3891 int found_spec_attr = 0;
3892 int has_low_pc_attr = 0;
3893 int has_high_pc_attr = 0;
3895 *part_die = zeroed_partial_die;
3896 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3897 info_ptr += bytes_read;
3901 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu_header);
3904 error ("Dwarf Error: Could not find abbrev number %d [in module %s]", abbrev_number,
3905 bfd_get_filename (abfd));
3907 part_die->offset = info_ptr - dwarf_info_buffer;
3908 part_die->tag = abbrev->tag;
3909 part_die->has_children = abbrev->has_children;
3910 part_die->abbrev = abbrev_number;
3912 for (i = 0; i < abbrev->num_attrs; ++i)
3914 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd,
3915 info_ptr, cu_header);
3917 /* Store the data if it is of an attribute we want to keep in a
3918 partial symbol table. */
3923 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
3924 if (part_die->name == NULL)
3925 part_die->name = DW_STRING (&attr);
3927 case DW_AT_MIPS_linkage_name:
3928 part_die->name = DW_STRING (&attr);
3931 has_low_pc_attr = 1;
3932 part_die->lowpc = DW_ADDR (&attr);
3935 has_high_pc_attr = 1;
3936 part_die->highpc = DW_ADDR (&attr);
3938 case DW_AT_location:
3939 /* Support the .debug_loc offsets */
3940 if (attr_form_is_block (&attr))
3942 part_die->locdesc = DW_BLOCK (&attr);
3944 else if (attr.form == DW_FORM_data4 || attr.form == DW_FORM_data8)
3946 dwarf2_complex_location_expr_complaint ();
3950 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
3951 "partial symbol information");
3954 case DW_AT_language:
3955 part_die->language = DW_UNSND (&attr);
3957 case DW_AT_external:
3958 part_die->is_external = DW_UNSND (&attr);
3960 case DW_AT_declaration:
3961 part_die->is_declaration = DW_UNSND (&attr);
3964 part_die->has_type = 1;
3966 case DW_AT_abstract_origin:
3967 case DW_AT_specification:
3968 found_spec_attr = 1;
3972 /* Ignore absolute siblings, they might point outside of
3973 the current compile unit. */
3974 if (attr.form == DW_FORM_ref_addr)
3975 complaint (&symfile_complaints, "ignoring absolute DW_AT_sibling");
3978 dwarf_info_buffer + dwarf2_get_ref_die_offset (&attr);
3985 /* If we found a reference attribute and the die has no name, try
3986 to find a name in the referred to die. */
3988 if (found_spec_attr && part_die->name == NULL)
3990 struct partial_die_info spec_die;
3994 spec_ptr = dwarf_info_buffer + dwarf2_get_ref_die_offset (&spec_attr);
3995 read_partial_die (&spec_die, abfd, spec_ptr, cu_header);
3998 part_die->name = spec_die.name;
4000 /* Copy DW_AT_external attribute if it is set. */
4001 if (spec_die.is_external)
4002 part_die->is_external = spec_die.is_external;
4006 /* When using the GNU linker, .gnu.linkonce. sections are used to
4007 eliminate duplicate copies of functions and vtables and such.
4008 The linker will arbitrarily choose one and discard the others.
4009 The AT_*_pc values for such functions refer to local labels in
4010 these sections. If the section from that file was discarded, the
4011 labels are not in the output, so the relocs get a value of 0.
4012 If this is a discarded function, mark the pc bounds as invalid,
4013 so that GDB will ignore it. */
4014 if (has_low_pc_attr && has_high_pc_attr
4015 && part_die->lowpc < part_die->highpc
4016 && (part_die->lowpc != 0
4017 || (bfd_get_file_flags (abfd) & HAS_RELOC)))
4018 part_die->has_pc_info = 1;
4022 /* Read the die from the .debug_info section buffer. And set diep to
4023 point to a newly allocated die with its information. */
4026 read_full_die (struct die_info **diep, bfd *abfd, char *info_ptr,
4027 const struct comp_unit_head *cu_header)
4029 unsigned int abbrev_number, bytes_read, i, offset;
4030 struct abbrev_info *abbrev;
4031 struct die_info *die;
4033 offset = info_ptr - dwarf_info_buffer;
4034 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
4035 info_ptr += bytes_read;
4038 die = dwarf_alloc_die ();
4040 die->abbrev = abbrev_number;
4046 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu_header);
4049 error ("Dwarf Error: could not find abbrev number %d [in module %s]", abbrev_number,
4050 bfd_get_filename (abfd));
4052 die = dwarf_alloc_die ();
4053 die->offset = offset;
4054 die->tag = abbrev->tag;
4055 die->has_children = abbrev->has_children;
4056 die->abbrev = abbrev_number;
4059 die->num_attrs = abbrev->num_attrs;
4060 die->attrs = (struct attribute *)
4061 xmalloc (die->num_attrs * sizeof (struct attribute));
4063 for (i = 0; i < abbrev->num_attrs; ++i)
4065 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
4066 abfd, info_ptr, cu_header);
4073 /* Read an attribute value described by an attribute form. */
4076 read_attribute_value (struct attribute *attr, unsigned form,
4077 bfd *abfd, char *info_ptr,
4078 const struct comp_unit_head *cu_header)
4080 unsigned int bytes_read;
4081 struct dwarf_block *blk;
4087 case DW_FORM_ref_addr:
4088 DW_ADDR (attr) = read_address (abfd, info_ptr, cu_header, &bytes_read);
4089 info_ptr += bytes_read;
4091 case DW_FORM_block2:
4092 blk = dwarf_alloc_block ();
4093 blk->size = read_2_bytes (abfd, info_ptr);
4095 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
4096 info_ptr += blk->size;
4097 DW_BLOCK (attr) = blk;
4099 case DW_FORM_block4:
4100 blk = dwarf_alloc_block ();
4101 blk->size = read_4_bytes (abfd, info_ptr);
4103 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
4104 info_ptr += blk->size;
4105 DW_BLOCK (attr) = blk;
4108 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
4112 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
4116 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
4119 case DW_FORM_string:
4120 DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
4121 info_ptr += bytes_read;
4124 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
4126 info_ptr += bytes_read;
4129 blk = dwarf_alloc_block ();
4130 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
4131 info_ptr += bytes_read;
4132 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
4133 info_ptr += blk->size;
4134 DW_BLOCK (attr) = blk;
4136 case DW_FORM_block1:
4137 blk = dwarf_alloc_block ();
4138 blk->size = read_1_byte (abfd, info_ptr);
4140 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
4141 info_ptr += blk->size;
4142 DW_BLOCK (attr) = blk;
4145 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
4149 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
4153 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
4154 info_ptr += bytes_read;
4157 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
4158 info_ptr += bytes_read;
4161 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
4165 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
4169 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
4173 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
4176 case DW_FORM_ref_udata:
4177 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
4178 info_ptr += bytes_read;
4180 case DW_FORM_indirect:
4181 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
4182 info_ptr += bytes_read;
4183 info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu_header);
4186 error ("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]",
4187 dwarf_form_name (form),
4188 bfd_get_filename (abfd));
4193 /* Read an attribute described by an abbreviated attribute. */
4196 read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
4197 bfd *abfd, char *info_ptr,
4198 const struct comp_unit_head *cu_header)
4200 attr->name = abbrev->name;
4201 return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu_header);
4204 /* read dwarf information from a buffer */
4207 read_1_byte (bfd *abfd, char *buf)
4209 return bfd_get_8 (abfd, (bfd_byte *) buf);
4213 read_1_signed_byte (bfd *abfd, char *buf)
4215 return bfd_get_signed_8 (abfd, (bfd_byte *) buf);
4219 read_2_bytes (bfd *abfd, char *buf)
4221 return bfd_get_16 (abfd, (bfd_byte *) buf);
4225 read_2_signed_bytes (bfd *abfd, char *buf)
4227 return bfd_get_signed_16 (abfd, (bfd_byte *) buf);
4231 read_4_bytes (bfd *abfd, char *buf)
4233 return bfd_get_32 (abfd, (bfd_byte *) buf);
4237 read_4_signed_bytes (bfd *abfd, char *buf)
4239 return bfd_get_signed_32 (abfd, (bfd_byte *) buf);
4242 static unsigned long
4243 read_8_bytes (bfd *abfd, char *buf)
4245 return bfd_get_64 (abfd, (bfd_byte *) buf);
4249 read_address (bfd *abfd, char *buf, const struct comp_unit_head *cu_header,
4252 CORE_ADDR retval = 0;
4254 if (cu_header->signed_addr_p)
4256 switch (cu_header->addr_size)
4259 retval = bfd_get_signed_16 (abfd, (bfd_byte *) buf);
4262 retval = bfd_get_signed_32 (abfd, (bfd_byte *) buf);
4265 retval = bfd_get_signed_64 (abfd, (bfd_byte *) buf);
4268 internal_error (__FILE__, __LINE__,
4269 "read_address: bad switch, signed [in module %s]",
4270 bfd_get_filename (abfd));
4275 switch (cu_header->addr_size)
4278 retval = bfd_get_16 (abfd, (bfd_byte *) buf);
4281 retval = bfd_get_32 (abfd, (bfd_byte *) buf);
4284 retval = bfd_get_64 (abfd, (bfd_byte *) buf);
4287 internal_error (__FILE__, __LINE__,
4288 "read_address: bad switch, unsigned [in module %s]",
4289 bfd_get_filename (abfd));
4293 *bytes_read = cu_header->addr_size;
4297 /* Read the initial length from a section. The (draft) DWARF 3
4298 specification allows the initial length to take up either 4 bytes
4299 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
4300 bytes describe the length and all offsets will be 8 bytes in length
4303 An older, non-standard 64-bit format is also handled by this
4304 function. The older format in question stores the initial length
4305 as an 8-byte quantity without an escape value. Lengths greater
4306 than 2^32 aren't very common which means that the initial 4 bytes
4307 is almost always zero. Since a length value of zero doesn't make
4308 sense for the 32-bit format, this initial zero can be considered to
4309 be an escape value which indicates the presence of the older 64-bit
4310 format. As written, the code can't detect (old format) lengths
4311 greater than 4GB. If it becomes necessary to handle lengths somewhat
4312 larger than 4GB, we could allow other small values (such as the
4313 non-sensical values of 1, 2, and 3) to also be used as escape values
4314 indicating the presence of the old format.
4316 The value returned via bytes_read should be used to increment
4317 the relevant pointer after calling read_initial_length().
4319 As a side effect, this function sets the fields initial_length_size
4320 and offset_size in cu_header to the values appropriate for the
4321 length field. (The format of the initial length field determines
4322 the width of file offsets to be fetched later with fetch_offset().)
4324 [ Note: read_initial_length() and read_offset() are based on the
4325 document entitled "DWARF Debugging Information Format", revision
4326 3, draft 8, dated November 19, 2001. This document was obtained
4329 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
4331 This document is only a draft and is subject to change. (So beware.)
4333 Details regarding the older, non-standard 64-bit format were
4334 determined empirically by examining 64-bit ELF files produced
4335 by the SGI toolchain on an IRIX 6.5 machine.
4337 - Kevin, July 16, 2002
4341 read_initial_length (bfd *abfd, char *buf, struct comp_unit_head *cu_header,
4346 retval = bfd_get_32 (abfd, (bfd_byte *) buf);
4348 if (retval == 0xffffffff)
4350 retval = bfd_get_64 (abfd, (bfd_byte *) buf + 4);
4352 if (cu_header != NULL)
4354 cu_header->initial_length_size = 12;
4355 cu_header->offset_size = 8;
4358 else if (retval == 0)
4360 /* Handle (non-standard) 64-bit DWARF2 formats such as that used
4362 retval = bfd_get_64 (abfd, (bfd_byte *) buf);
4364 if (cu_header != NULL)
4366 cu_header->initial_length_size = 8;
4367 cu_header->offset_size = 8;
4373 if (cu_header != NULL)
4375 cu_header->initial_length_size = 4;
4376 cu_header->offset_size = 4;
4383 /* Read an offset from the data stream. The size of the offset is
4384 given by cu_header->offset_size. */
4387 read_offset (bfd *abfd, char *buf, const struct comp_unit_head *cu_header,
4392 switch (cu_header->offset_size)
4395 retval = bfd_get_32 (abfd, (bfd_byte *) buf);
4399 retval = bfd_get_64 (abfd, (bfd_byte *) buf);
4403 internal_error (__FILE__, __LINE__,
4404 "read_offset: bad switch [in module %s]",
4405 bfd_get_filename (abfd));
4412 read_n_bytes (bfd *abfd, char *buf, unsigned int size)
4414 /* If the size of a host char is 8 bits, we can return a pointer
4415 to the buffer, otherwise we have to copy the data to a buffer
4416 allocated on the temporary obstack. */
4417 gdb_assert (HOST_CHAR_BIT == 8);
4422 read_string (bfd *abfd, char *buf, unsigned int *bytes_read_ptr)
4424 /* If the size of a host char is 8 bits, we can return a pointer
4425 to the string, otherwise we have to copy the string to a buffer
4426 allocated on the temporary obstack. */
4427 gdb_assert (HOST_CHAR_BIT == 8);
4430 *bytes_read_ptr = 1;
4433 *bytes_read_ptr = strlen (buf) + 1;
4438 read_indirect_string (bfd *abfd, char *buf,
4439 const struct comp_unit_head *cu_header,
4440 unsigned int *bytes_read_ptr)
4442 LONGEST str_offset = read_offset (abfd, buf, cu_header,
4443 (int *) bytes_read_ptr);
4445 if (dwarf_str_buffer == NULL)
4447 error ("DW_FORM_strp used without .debug_str section [in module %s]",
4448 bfd_get_filename (abfd));
4451 if (str_offset >= dwarf_str_size)
4453 error ("DW_FORM_strp pointing outside of .debug_str section [in module %s]",
4454 bfd_get_filename (abfd));
4457 gdb_assert (HOST_CHAR_BIT == 8);
4458 if (dwarf_str_buffer[str_offset] == '\0')
4460 return dwarf_str_buffer + str_offset;
4463 static unsigned long
4464 read_unsigned_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr)
4466 unsigned long result;
4467 unsigned int num_read;
4477 byte = bfd_get_8 (abfd, (bfd_byte *) buf);
4480 result |= ((unsigned long)(byte & 127) << shift);
4481 if ((byte & 128) == 0)
4487 *bytes_read_ptr = num_read;
4492 read_signed_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr)
4495 int i, shift, size, num_read;
4505 byte = bfd_get_8 (abfd, (bfd_byte *) buf);
4508 result |= ((long)(byte & 127) << shift);
4510 if ((byte & 128) == 0)
4515 if ((shift < size) && (byte & 0x40))
4517 result |= -(1 << shift);
4519 *bytes_read_ptr = num_read;
4524 set_cu_language (unsigned int lang)
4530 cu_language = language_c;
4532 case DW_LANG_C_plus_plus:
4533 cu_language = language_cplus;
4535 case DW_LANG_Fortran77:
4536 case DW_LANG_Fortran90:
4537 case DW_LANG_Fortran95:
4538 cu_language = language_fortran;
4540 case DW_LANG_Mips_Assembler:
4541 cu_language = language_asm;
4544 cu_language = language_java;
4548 case DW_LANG_Cobol74:
4549 case DW_LANG_Cobol85:
4550 case DW_LANG_Pascal83:
4551 case DW_LANG_Modula2:
4553 cu_language = language_minimal;
4556 cu_language_defn = language_def (cu_language);
4559 /* Return the named attribute or NULL if not there. */
4561 static struct attribute *
4562 dwarf_attr (struct die_info *die, unsigned int name)
4565 struct attribute *spec = NULL;
4567 for (i = 0; i < die->num_attrs; ++i)
4569 if (die->attrs[i].name == name)
4571 return &die->attrs[i];
4573 if (die->attrs[i].name == DW_AT_specification
4574 || die->attrs[i].name == DW_AT_abstract_origin)
4575 spec = &die->attrs[i];
4579 struct die_info *ref_die =
4580 follow_die_ref (dwarf2_get_ref_die_offset (spec));
4583 return dwarf_attr (ref_die, name);
4590 die_is_declaration (struct die_info *die)
4592 return (dwarf_attr (die, DW_AT_declaration)
4593 && ! dwarf_attr (die, DW_AT_specification));
4597 /* Free the line_header structure *LH, and any arrays and strings it
4600 free_line_header (struct line_header *lh)
4602 if (lh->standard_opcode_lengths)
4603 xfree (lh->standard_opcode_lengths);
4605 /* Remember that all the lh->file_names[i].name pointers are
4606 pointers into debug_line_buffer, and don't need to be freed. */
4608 xfree (lh->file_names);
4610 /* Similarly for the include directory names. */
4611 if (lh->include_dirs)
4612 xfree (lh->include_dirs);
4618 /* Add an entry to LH's include directory table. */
4620 add_include_dir (struct line_header *lh, char *include_dir)
4622 /* Grow the array if necessary. */
4623 if (lh->include_dirs_size == 0)
4625 lh->include_dirs_size = 1; /* for testing */
4626 lh->include_dirs = xmalloc (lh->include_dirs_size
4627 * sizeof (*lh->include_dirs));
4629 else if (lh->num_include_dirs >= lh->include_dirs_size)
4631 lh->include_dirs_size *= 2;
4632 lh->include_dirs = xrealloc (lh->include_dirs,
4633 (lh->include_dirs_size
4634 * sizeof (*lh->include_dirs)));
4637 lh->include_dirs[lh->num_include_dirs++] = include_dir;
4641 /* Add an entry to LH's file name table. */
4643 add_file_name (struct line_header *lh,
4645 unsigned int dir_index,
4646 unsigned int mod_time,
4647 unsigned int length)
4649 struct file_entry *fe;
4651 /* Grow the array if necessary. */
4652 if (lh->file_names_size == 0)
4654 lh->file_names_size = 1; /* for testing */
4655 lh->file_names = xmalloc (lh->file_names_size
4656 * sizeof (*lh->file_names));
4658 else if (lh->num_file_names >= lh->file_names_size)
4660 lh->file_names_size *= 2;
4661 lh->file_names = xrealloc (lh->file_names,
4662 (lh->file_names_size
4663 * sizeof (*lh->file_names)));
4666 fe = &lh->file_names[lh->num_file_names++];
4668 fe->dir_index = dir_index;
4669 fe->mod_time = mod_time;
4670 fe->length = length;
4674 /* Read the statement program header starting at OFFSET in
4675 dwarf_line_buffer, according to the endianness of ABFD. Return a
4676 pointer to a struct line_header, allocated using xmalloc.
4678 NOTE: the strings in the include directory and file name tables of
4679 the returned object point into debug_line_buffer, and must not be
4681 static struct line_header *
4682 dwarf_decode_line_header (unsigned int offset, bfd *abfd,
4683 const struct comp_unit_head *cu_header)
4685 struct cleanup *back_to;
4686 struct line_header *lh;
4690 char *cur_dir, *cur_file;
4692 if (dwarf_line_buffer == NULL)
4694 complaint (&symfile_complaints, "missing .debug_line section");
4698 /* Make sure that at least there's room for the total_length field. That
4699 could be 12 bytes long, but we're just going to fudge that. */
4700 if (offset + 4 >= dwarf_line_size)
4702 dwarf2_statement_list_fits_in_line_number_section_complaint ();
4706 lh = xmalloc (sizeof (*lh));
4707 memset (lh, 0, sizeof (*lh));
4708 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
4711 line_ptr = dwarf_line_buffer + offset;
4713 /* read in the header */
4714 lh->total_length = read_initial_length (abfd, line_ptr, NULL, &bytes_read);
4715 line_ptr += bytes_read;
4716 if (line_ptr + lh->total_length > dwarf_line_buffer + dwarf_line_size)
4718 dwarf2_statement_list_fits_in_line_number_section_complaint ();
4721 lh->statement_program_end = line_ptr + lh->total_length;
4722 lh->version = read_2_bytes (abfd, line_ptr);
4724 lh->header_length = read_offset (abfd, line_ptr, cu_header, &bytes_read);
4725 line_ptr += bytes_read;
4726 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
4728 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
4730 lh->line_base = read_1_signed_byte (abfd, line_ptr);
4732 lh->line_range = read_1_byte (abfd, line_ptr);
4734 lh->opcode_base = read_1_byte (abfd, line_ptr);
4736 lh->standard_opcode_lengths
4737 = (unsigned char *) xmalloc (lh->opcode_base * sizeof (unsigned char));
4739 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
4740 for (i = 1; i < lh->opcode_base; ++i)
4742 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
4746 /* Read directory table */
4747 while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
4749 line_ptr += bytes_read;
4750 add_include_dir (lh, cur_dir);
4752 line_ptr += bytes_read;
4754 /* Read file name table */
4755 while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
4757 unsigned int dir_index, mod_time, length;
4759 line_ptr += bytes_read;
4760 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
4761 line_ptr += bytes_read;
4762 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
4763 line_ptr += bytes_read;
4764 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
4765 line_ptr += bytes_read;
4767 add_file_name (lh, cur_file, dir_index, mod_time, length);
4769 line_ptr += bytes_read;
4770 lh->statement_program_start = line_ptr;
4772 if (line_ptr > dwarf_line_buffer + dwarf_line_size)
4773 complaint (&symfile_complaints,
4774 "line number info header doesn't fit in `.debug_line' section");
4776 discard_cleanups (back_to);
4780 /* This function exists to work around a bug in certain compilers
4781 (particularly GCC 2.95), in which the first line number marker of a
4782 function does not show up until after the prologue, right before
4783 the second line number marker. This function shifts ADDRESS down
4784 to the beginning of the function if necessary, and is called on
4785 addresses passed to record_line. */
4788 check_cu_functions (CORE_ADDR address)
4790 struct function_range *fn;
4792 /* Find the function_range containing address. */
4797 cu_cached_fn = cu_first_fn;
4801 if (fn->lowpc <= address && fn->highpc > address)
4807 while (fn && fn != cu_cached_fn)
4808 if (fn->lowpc <= address && fn->highpc > address)
4818 if (address != fn->lowpc)
4819 complaint (&symfile_complaints,
4820 "misplaced first line number at 0x%lx for '%s'",
4821 (unsigned long) address, fn->name);
4826 /* Decode the line number information for the compilation unit whose
4827 line number info is at OFFSET in the .debug_line section.
4828 The compilation directory of the file is passed in COMP_DIR. */
4831 dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
4832 const struct comp_unit_head *cu_header)
4836 unsigned int i, bytes_read;
4838 unsigned char op_code, extended_op, adj_opcode;
4840 line_ptr = lh->statement_program_start;
4841 line_end = lh->statement_program_end;
4843 /* Read the statement sequences until there's nothing left. */
4844 while (line_ptr < line_end)
4846 /* state machine registers */
4847 CORE_ADDR address = 0;
4848 unsigned int file = 1;
4849 unsigned int line = 1;
4850 unsigned int column = 0;
4851 int is_stmt = lh->default_is_stmt;
4852 int basic_block = 0;
4853 int end_sequence = 0;
4855 /* Start a subfile for the current file of the state machine. */
4856 if (lh->num_file_names >= file)
4858 /* lh->include_dirs and lh->file_names are 0-based, but the
4859 directory and file name numbers in the statement program
4861 struct file_entry *fe = &lh->file_names[file - 1];
4864 dir = lh->include_dirs[fe->dir_index - 1];
4867 dwarf2_start_subfile (fe->name, dir);
4870 /* Decode the table. */
4871 while (!end_sequence)
4873 op_code = read_1_byte (abfd, line_ptr);
4876 if (op_code >= lh->opcode_base)
4877 { /* Special operand. */
4878 adj_opcode = op_code - lh->opcode_base;
4879 address += (adj_opcode / lh->line_range)
4880 * lh->minimum_instruction_length;
4881 line += lh->line_base + (adj_opcode % lh->line_range);
4882 /* append row to matrix using current values */
4883 record_line (current_subfile, line,
4884 check_cu_functions (address));
4887 else switch (op_code)
4889 case DW_LNS_extended_op:
4890 line_ptr += 1; /* ignore length */
4891 extended_op = read_1_byte (abfd, line_ptr);
4893 switch (extended_op)
4895 case DW_LNE_end_sequence:
4897 record_line (current_subfile, 0, address);
4899 case DW_LNE_set_address:
4900 address = read_address (abfd, line_ptr, cu_header, &bytes_read);
4901 line_ptr += bytes_read;
4902 address += baseaddr;
4904 case DW_LNE_define_file:
4907 unsigned int dir_index, mod_time, length;
4909 cur_file = read_string (abfd, line_ptr, &bytes_read);
4910 line_ptr += bytes_read;
4912 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
4913 line_ptr += bytes_read;
4915 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
4916 line_ptr += bytes_read;
4918 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
4919 line_ptr += bytes_read;
4920 add_file_name (lh, cur_file, dir_index, mod_time, length);
4924 complaint (&symfile_complaints,
4925 "mangled .debug_line section");
4930 record_line (current_subfile, line,
4931 check_cu_functions (address));
4934 case DW_LNS_advance_pc:
4935 address += lh->minimum_instruction_length
4936 * read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
4937 line_ptr += bytes_read;
4939 case DW_LNS_advance_line:
4940 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
4941 line_ptr += bytes_read;
4943 case DW_LNS_set_file:
4945 /* lh->include_dirs and lh->file_names are 0-based,
4946 but the directory and file name numbers in the
4947 statement program are 1-based. */
4948 struct file_entry *fe;
4950 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
4951 line_ptr += bytes_read;
4952 fe = &lh->file_names[file - 1];
4954 dir = lh->include_dirs[fe->dir_index - 1];
4957 dwarf2_start_subfile (fe->name, dir);
4960 case DW_LNS_set_column:
4961 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
4962 line_ptr += bytes_read;
4964 case DW_LNS_negate_stmt:
4965 is_stmt = (!is_stmt);
4967 case DW_LNS_set_basic_block:
4970 /* Add to the address register of the state machine the
4971 address increment value corresponding to special opcode
4972 255. Ie, this value is scaled by the minimum instruction
4973 length since special opcode 255 would have scaled the
4975 case DW_LNS_const_add_pc:
4976 address += (lh->minimum_instruction_length
4977 * ((255 - lh->opcode_base) / lh->line_range));
4979 case DW_LNS_fixed_advance_pc:
4980 address += read_2_bytes (abfd, line_ptr);
4984 { /* Unknown standard opcode, ignore it. */
4986 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
4988 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
4989 line_ptr += bytes_read;
4997 /* Start a subfile for DWARF. FILENAME is the name of the file and
4998 DIRNAME the name of the source directory which contains FILENAME
4999 or NULL if not known.
5000 This routine tries to keep line numbers from identical absolute and
5001 relative file names in a common subfile.
5003 Using the `list' example from the GDB testsuite, which resides in
5004 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
5005 of /srcdir/list0.c yields the following debugging information for list0.c:
5007 DW_AT_name: /srcdir/list0.c
5008 DW_AT_comp_dir: /compdir
5009 files.files[0].name: list0.h
5010 files.files[0].dir: /srcdir
5011 files.files[1].name: list0.c
5012 files.files[1].dir: /srcdir
5014 The line number information for list0.c has to end up in a single
5015 subfile, so that `break /srcdir/list0.c:1' works as expected. */
5018 dwarf2_start_subfile (char *filename, char *dirname)
5020 /* If the filename isn't absolute, try to match an existing subfile
5021 with the full pathname. */
5023 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
5025 struct subfile *subfile;
5026 char *fullname = concat (dirname, "/", filename, NULL);
5028 for (subfile = subfiles; subfile; subfile = subfile->next)
5030 if (FILENAME_CMP (subfile->name, fullname) == 0)
5032 current_subfile = subfile;
5039 start_subfile (filename, dirname);
5043 var_decode_location (struct attribute *attr, struct symbol *sym,
5044 struct objfile *objfile,
5045 const struct comp_unit_head *cu_header)
5047 /* NOTE drow/2003-01-30: There used to be a comment and some special
5048 code here to turn a symbol with DW_AT_external and a
5049 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
5050 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
5051 with some versions of binutils) where shared libraries could have
5052 relocations against symbols in their debug information - the
5053 minimal symbol would have the right address, but the debug info
5054 would not. It's no longer necessary, because we will explicitly
5055 apply relocations when we read in the debug information now. */
5057 /* A DW_AT_location attribute with no contents indicates that a
5058 variable has been optimized away. */
5059 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
5061 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
5065 /* Handle one degenerate form of location expression specially, to
5066 preserve GDB's previous behavior when section offsets are
5067 specified. If this is just a DW_OP_addr then mark this symbol
5070 if (attr_form_is_block (attr)
5071 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
5072 && DW_BLOCK (attr)->data[0] == DW_OP_addr)
5076 SYMBOL_VALUE_ADDRESS (sym) =
5077 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu_header,
5079 fixup_symbol_section (sym, objfile);
5080 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
5081 SYMBOL_SECTION (sym));
5082 SYMBOL_CLASS (sym) = LOC_STATIC;
5086 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
5087 expression evaluator, and use LOC_COMPUTED only when necessary
5088 (i.e. when the value of a register or memory location is
5089 referenced, or a thread-local block, etc.). Then again, it might
5090 not be worthwhile. I'm assuming that it isn't unless performance
5091 or memory numbers show me otherwise. */
5093 dwarf2_symbol_mark_computed (attr, sym, cu_header, objfile);
5094 SYMBOL_CLASS (sym) = LOC_COMPUTED;
5097 /* Given a pointer to a DWARF information entry, figure out if we need
5098 to make a symbol table entry for it, and if so, create a new entry
5099 and return a pointer to it.
5100 If TYPE is NULL, determine symbol type from the die, otherwise
5101 used the passed type. */
5103 static struct symbol *
5104 new_symbol (struct die_info *die, struct type *type, struct objfile *objfile,
5105 const struct comp_unit_head *cu_header)
5107 struct symbol *sym = NULL;
5109 struct attribute *attr = NULL;
5110 struct attribute *attr2 = NULL;
5113 name = dwarf2_linkage_name (die);
5116 sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack,
5117 sizeof (struct symbol));
5118 OBJSTAT (objfile, n_syms++);
5119 memset (sym, 0, sizeof (struct symbol));
5121 /* Cache this symbol's name and the name's demangled form (if any). */
5122 SYMBOL_LANGUAGE (sym) = cu_language;
5123 SYMBOL_SET_NAMES (sym, name, strlen (name), objfile);
5125 /* Default assumptions.
5126 Use the passed type or decode it from the die. */
5127 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
5128 SYMBOL_CLASS (sym) = LOC_STATIC;
5130 SYMBOL_TYPE (sym) = type;
5132 SYMBOL_TYPE (sym) = die_type (die, objfile, cu_header);
5133 attr = dwarf_attr (die, DW_AT_decl_line);
5136 SYMBOL_LINE (sym) = DW_UNSND (attr);
5141 attr = dwarf_attr (die, DW_AT_low_pc);
5144 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
5146 SYMBOL_CLASS (sym) = LOC_LABEL;
5148 case DW_TAG_subprogram:
5149 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
5151 SYMBOL_CLASS (sym) = LOC_BLOCK;
5152 attr2 = dwarf_attr (die, DW_AT_external);
5153 if (attr2 && (DW_UNSND (attr2) != 0))
5155 add_symbol_to_list (sym, &global_symbols);
5159 add_symbol_to_list (sym, list_in_scope);
5162 case DW_TAG_variable:
5163 /* Compilation with minimal debug info may result in variables
5164 with missing type entries. Change the misleading `void' type
5165 to something sensible. */
5166 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
5167 SYMBOL_TYPE (sym) = init_type (TYPE_CODE_INT,
5168 TARGET_INT_BIT / HOST_CHAR_BIT, 0,
5169 "<variable, no debug info>",
5171 attr = dwarf_attr (die, DW_AT_const_value);
5174 dwarf2_const_value (attr, sym, objfile, cu_header);
5175 attr2 = dwarf_attr (die, DW_AT_external);
5176 if (attr2 && (DW_UNSND (attr2) != 0))
5177 add_symbol_to_list (sym, &global_symbols);
5179 add_symbol_to_list (sym, list_in_scope);
5182 attr = dwarf_attr (die, DW_AT_location);
5185 var_decode_location (attr, sym, objfile, cu_header);
5186 attr2 = dwarf_attr (die, DW_AT_external);
5187 if (attr2 && (DW_UNSND (attr2) != 0))
5188 add_symbol_to_list (sym, &global_symbols);
5190 add_symbol_to_list (sym, list_in_scope);
5194 /* We do not know the address of this symbol.
5195 If it is an external symbol and we have type information
5196 for it, enter the symbol as a LOC_UNRESOLVED symbol.
5197 The address of the variable will then be determined from
5198 the minimal symbol table whenever the variable is
5200 attr2 = dwarf_attr (die, DW_AT_external);
5201 if (attr2 && (DW_UNSND (attr2) != 0)
5202 && dwarf_attr (die, DW_AT_type) != NULL)
5204 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
5205 add_symbol_to_list (sym, &global_symbols);
5209 case DW_TAG_formal_parameter:
5210 attr = dwarf_attr (die, DW_AT_location);
5213 SYMBOL_VALUE (sym) =
5214 decode_locdesc (DW_BLOCK (attr), objfile, cu_header);
5217 SYMBOL_CLASS (sym) = LOC_REGPARM;
5218 SYMBOL_VALUE (sym) =
5219 DWARF2_REG_TO_REGNUM (SYMBOL_VALUE (sym));
5225 if (basereg != frame_base_reg)
5226 dwarf2_complex_location_expr_complaint ();
5227 SYMBOL_CLASS (sym) = LOC_REF_ARG;
5231 SYMBOL_CLASS (sym) = LOC_BASEREG_ARG;
5232 SYMBOL_BASEREG (sym) = DWARF2_REG_TO_REGNUM (basereg);
5237 SYMBOL_CLASS (sym) = LOC_ARG;
5240 attr = dwarf_attr (die, DW_AT_const_value);
5243 dwarf2_const_value (attr, sym, objfile, cu_header);
5245 add_symbol_to_list (sym, list_in_scope);
5247 case DW_TAG_unspecified_parameters:
5248 /* From varargs functions; gdb doesn't seem to have any
5249 interest in this information, so just ignore it for now.
5252 case DW_TAG_class_type:
5253 case DW_TAG_structure_type:
5254 case DW_TAG_union_type:
5255 case DW_TAG_enumeration_type:
5256 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
5257 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
5258 add_symbol_to_list (sym, list_in_scope);
5260 /* The semantics of C++ state that "struct foo { ... }" also
5261 defines a typedef for "foo". Synthesize a typedef symbol so
5262 that "ptype foo" works as expected. */
5263 if (cu_language == language_cplus)
5265 struct symbol *typedef_sym = (struct symbol *)
5266 obstack_alloc (&objfile->symbol_obstack,
5267 sizeof (struct symbol));
5268 *typedef_sym = *sym;
5269 SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
5270 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
5271 TYPE_NAME (SYMBOL_TYPE (sym)) =
5272 obsavestring (DEPRECATED_SYMBOL_NAME (sym),
5273 strlen (DEPRECATED_SYMBOL_NAME (sym)),
5274 &objfile->type_obstack);
5275 add_symbol_to_list (typedef_sym, list_in_scope);
5278 case DW_TAG_typedef:
5279 case DW_TAG_base_type:
5280 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
5281 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
5282 add_symbol_to_list (sym, list_in_scope);
5284 case DW_TAG_enumerator:
5285 attr = dwarf_attr (die, DW_AT_const_value);
5288 dwarf2_const_value (attr, sym, objfile, cu_header);
5290 add_symbol_to_list (sym, list_in_scope);
5293 /* Not a tag we recognize. Hopefully we aren't processing
5294 trash data, but since we must specifically ignore things
5295 we don't recognize, there is nothing else we should do at
5297 complaint (&symfile_complaints, "unsupported tag: '%s'",
5298 dwarf_tag_name (die->tag));
5305 /* Copy constant value from an attribute to a symbol. */
5308 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
5309 struct objfile *objfile,
5310 const struct comp_unit_head *cu_header)
5312 struct dwarf_block *blk;
5317 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
5318 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym),
5319 cu_header->addr_size,
5320 TYPE_LENGTH (SYMBOL_TYPE
5322 SYMBOL_VALUE_BYTES (sym) = (char *)
5323 obstack_alloc (&objfile->symbol_obstack, cu_header->addr_size);
5324 /* NOTE: cagney/2003-05-09: In-lined store_address call with
5325 it's body - store_unsigned_integer. */
5326 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size,
5328 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
5330 case DW_FORM_block1:
5331 case DW_FORM_block2:
5332 case DW_FORM_block4:
5334 blk = DW_BLOCK (attr);
5335 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
5336 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym),
5338 TYPE_LENGTH (SYMBOL_TYPE
5340 SYMBOL_VALUE_BYTES (sym) = (char *)
5341 obstack_alloc (&objfile->symbol_obstack, blk->size);
5342 memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
5343 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
5346 /* The DW_AT_const_value attributes are supposed to carry the
5347 symbol's value "represented as it would be on the target
5348 architecture." By the time we get here, it's already been
5349 converted to host endianness, so we just need to sign- or
5350 zero-extend it as appropriate. */
5352 dwarf2_const_value_data (attr, sym, 8);
5355 dwarf2_const_value_data (attr, sym, 16);
5358 dwarf2_const_value_data (attr, sym, 32);
5361 dwarf2_const_value_data (attr, sym, 64);
5365 SYMBOL_VALUE (sym) = DW_SND (attr);
5366 SYMBOL_CLASS (sym) = LOC_CONST;
5370 SYMBOL_VALUE (sym) = DW_UNSND (attr);
5371 SYMBOL_CLASS (sym) = LOC_CONST;
5375 complaint (&symfile_complaints,
5376 "unsupported const value attribute form: '%s'",
5377 dwarf_form_name (attr->form));
5378 SYMBOL_VALUE (sym) = 0;
5379 SYMBOL_CLASS (sym) = LOC_CONST;
5385 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
5386 or zero-extend it as appropriate for the symbol's type. */
5388 dwarf2_const_value_data (struct attribute *attr,
5392 LONGEST l = DW_UNSND (attr);
5394 if (bits < sizeof (l) * 8)
5396 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym)))
5397 l &= ((LONGEST) 1 << bits) - 1;
5399 l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits);
5402 SYMBOL_VALUE (sym) = l;
5403 SYMBOL_CLASS (sym) = LOC_CONST;
5407 /* Return the type of the die in question using its DW_AT_type attribute. */
5409 static struct type *
5410 die_type (struct die_info *die, struct objfile *objfile,
5411 const struct comp_unit_head *cu_header)
5414 struct attribute *type_attr;
5415 struct die_info *type_die;
5418 type_attr = dwarf_attr (die, DW_AT_type);
5421 /* A missing DW_AT_type represents a void type. */
5422 return dwarf2_fundamental_type (objfile, FT_VOID);
5426 ref = dwarf2_get_ref_die_offset (type_attr);
5427 type_die = follow_die_ref (ref);
5430 error ("Dwarf Error: Cannot find referent at offset %d [in module %s]",
5431 ref, objfile->name);
5435 type = tag_type_to_type (type_die, objfile, cu_header);
5438 dump_die (type_die);
5439 error ("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]",
5445 /* Return the containing type of the die in question using its
5446 DW_AT_containing_type attribute. */
5448 static struct type *
5449 die_containing_type (struct die_info *die, struct objfile *objfile,
5450 const struct comp_unit_head *cu_header)
5452 struct type *type = NULL;
5453 struct attribute *type_attr;
5454 struct die_info *type_die = NULL;
5457 type_attr = dwarf_attr (die, DW_AT_containing_type);
5460 ref = dwarf2_get_ref_die_offset (type_attr);
5461 type_die = follow_die_ref (ref);
5464 error ("Dwarf Error: Cannot find referent at offset %d [in module %s]", ref,
5468 type = tag_type_to_type (type_die, objfile, cu_header);
5473 dump_die (type_die);
5474 error ("Dwarf Error: Problem turning containing type into gdb type [in module %s]",
5481 static struct type *
5482 type_at_offset (unsigned int offset, struct objfile *objfile)
5484 struct die_info *die;
5487 die = follow_die_ref (offset);
5490 error ("Dwarf Error: Cannot find type referent at offset %d.", offset);
5493 type = tag_type_to_type (die, objfile);
5498 static struct type *
5499 tag_type_to_type (struct die_info *die, struct objfile *objfile,
5500 const struct comp_unit_head *cu_header)
5508 read_type_die (die, objfile, cu_header);
5512 error ("Dwarf Error: Cannot find type of die [in module %s]",
5520 read_type_die (struct die_info *die, struct objfile *objfile,
5521 const struct comp_unit_head *cu_header)
5525 case DW_TAG_class_type:
5526 case DW_TAG_structure_type:
5527 case DW_TAG_union_type:
5528 read_structure_scope (die, objfile, cu_header);
5530 case DW_TAG_enumeration_type:
5531 read_enumeration (die, objfile, cu_header);
5533 case DW_TAG_subprogram:
5534 case DW_TAG_subroutine_type:
5535 read_subroutine_type (die, objfile, cu_header);
5537 case DW_TAG_array_type:
5538 read_array_type (die, objfile, cu_header);
5540 case DW_TAG_pointer_type:
5541 read_tag_pointer_type (die, objfile, cu_header);
5543 case DW_TAG_ptr_to_member_type:
5544 read_tag_ptr_to_member_type (die, objfile, cu_header);
5546 case DW_TAG_reference_type:
5547 read_tag_reference_type (die, objfile, cu_header);
5549 case DW_TAG_const_type:
5550 read_tag_const_type (die, objfile, cu_header);
5552 case DW_TAG_volatile_type:
5553 read_tag_volatile_type (die, objfile, cu_header);
5555 case DW_TAG_string_type:
5556 read_tag_string_type (die, objfile);
5558 case DW_TAG_typedef:
5559 read_typedef (die, objfile, cu_header);
5561 case DW_TAG_base_type:
5562 read_base_type (die, objfile);
5565 complaint (&symfile_complaints, "unexepected tag in read_type_die: '%s'",
5566 dwarf_tag_name (die->tag));
5571 static struct type *
5572 dwarf_base_type (int encoding, int size, struct objfile *objfile)
5574 /* FIXME - this should not produce a new (struct type *)
5575 every time. It should cache base types. */
5579 case DW_ATE_address:
5580 type = dwarf2_fundamental_type (objfile, FT_VOID);
5582 case DW_ATE_boolean:
5583 type = dwarf2_fundamental_type (objfile, FT_BOOLEAN);
5585 case DW_ATE_complex_float:
5588 type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_COMPLEX);
5592 type = dwarf2_fundamental_type (objfile, FT_COMPLEX);
5598 type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT);
5602 type = dwarf2_fundamental_type (objfile, FT_FLOAT);
5609 type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR);
5612 type = dwarf2_fundamental_type (objfile, FT_SIGNED_SHORT);
5616 type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER);
5620 case DW_ATE_signed_char:
5621 type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR);
5623 case DW_ATE_unsigned:
5627 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR);
5630 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_SHORT);
5634 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_INTEGER);
5638 case DW_ATE_unsigned_char:
5639 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR);
5642 type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER);
5649 copy_die (struct die_info *old_die)
5651 struct die_info *new_die;
5654 new_die = (struct die_info *) xmalloc (sizeof (struct die_info));
5655 memset (new_die, 0, sizeof (struct die_info));
5657 new_die->tag = old_die->tag;
5658 new_die->has_children = old_die->has_children;
5659 new_die->abbrev = old_die->abbrev;
5660 new_die->offset = old_die->offset;
5661 new_die->type = NULL;
5663 num_attrs = old_die->num_attrs;
5664 new_die->num_attrs = num_attrs;
5665 new_die->attrs = (struct attribute *)
5666 xmalloc (num_attrs * sizeof (struct attribute));
5668 for (i = 0; i < old_die->num_attrs; ++i)
5670 new_die->attrs[i].name = old_die->attrs[i].name;
5671 new_die->attrs[i].form = old_die->attrs[i].form;
5672 new_die->attrs[i].u.addr = old_die->attrs[i].u.addr;
5675 new_die->next = NULL;
5680 /* Return sibling of die, NULL if no sibling. */
5682 static struct die_info *
5683 sibling_die (struct die_info *die)
5685 int nesting_level = 0;
5687 if (!die->has_children)
5689 if (die->next && (die->next->tag == 0))
5702 if (die->has_children)
5712 while (nesting_level);
5713 if (die && (die->tag == 0))
5724 /* Get linkage name of a die, return NULL if not found. */
5727 dwarf2_linkage_name (struct die_info *die)
5729 struct attribute *attr;
5731 attr = dwarf_attr (die, DW_AT_MIPS_linkage_name);
5732 if (attr && DW_STRING (attr))
5733 return DW_STRING (attr);
5734 attr = dwarf_attr (die, DW_AT_name);
5735 if (attr && DW_STRING (attr))
5736 return DW_STRING (attr);
5740 /* Get name of a die, return NULL if not found. */
5743 dwarf2_name (struct die_info *die)
5745 struct attribute *attr;
5747 attr = dwarf_attr (die, DW_AT_name);
5748 if (attr && DW_STRING (attr))
5749 return DW_STRING (attr);
5753 /* Return the die that this die in an extension of, or NULL if there
5756 static struct die_info *
5757 dwarf2_extension (struct die_info *die)
5759 struct attribute *attr;
5760 struct die_info *extension_die;
5763 attr = dwarf_attr (die, DW_AT_extension);
5767 ref = dwarf2_get_ref_die_offset (attr);
5768 extension_die = follow_die_ref (ref);
5771 error ("Dwarf Error: Cannot find referent at offset %d.", ref);
5774 return extension_die;
5777 /* Convert a DIE tag into its string name. */
5780 dwarf_tag_name (register unsigned tag)
5784 case DW_TAG_padding:
5785 return "DW_TAG_padding";
5786 case DW_TAG_array_type:
5787 return "DW_TAG_array_type";
5788 case DW_TAG_class_type:
5789 return "DW_TAG_class_type";
5790 case DW_TAG_entry_point:
5791 return "DW_TAG_entry_point";
5792 case DW_TAG_enumeration_type:
5793 return "DW_TAG_enumeration_type";
5794 case DW_TAG_formal_parameter:
5795 return "DW_TAG_formal_parameter";
5796 case DW_TAG_imported_declaration:
5797 return "DW_TAG_imported_declaration";
5799 return "DW_TAG_label";
5800 case DW_TAG_lexical_block:
5801 return "DW_TAG_lexical_block";
5803 return "DW_TAG_member";
5804 case DW_TAG_pointer_type:
5805 return "DW_TAG_pointer_type";
5806 case DW_TAG_reference_type:
5807 return "DW_TAG_reference_type";
5808 case DW_TAG_compile_unit:
5809 return "DW_TAG_compile_unit";
5810 case DW_TAG_string_type:
5811 return "DW_TAG_string_type";
5812 case DW_TAG_structure_type:
5813 return "DW_TAG_structure_type";
5814 case DW_TAG_subroutine_type:
5815 return "DW_TAG_subroutine_type";
5816 case DW_TAG_typedef:
5817 return "DW_TAG_typedef";
5818 case DW_TAG_union_type:
5819 return "DW_TAG_union_type";
5820 case DW_TAG_unspecified_parameters:
5821 return "DW_TAG_unspecified_parameters";
5822 case DW_TAG_variant:
5823 return "DW_TAG_variant";
5824 case DW_TAG_common_block:
5825 return "DW_TAG_common_block";
5826 case DW_TAG_common_inclusion:
5827 return "DW_TAG_common_inclusion";
5828 case DW_TAG_inheritance:
5829 return "DW_TAG_inheritance";
5830 case DW_TAG_inlined_subroutine:
5831 return "DW_TAG_inlined_subroutine";
5833 return "DW_TAG_module";
5834 case DW_TAG_ptr_to_member_type:
5835 return "DW_TAG_ptr_to_member_type";
5836 case DW_TAG_set_type:
5837 return "DW_TAG_set_type";
5838 case DW_TAG_subrange_type:
5839 return "DW_TAG_subrange_type";
5840 case DW_TAG_with_stmt:
5841 return "DW_TAG_with_stmt";
5842 case DW_TAG_access_declaration:
5843 return "DW_TAG_access_declaration";
5844 case DW_TAG_base_type:
5845 return "DW_TAG_base_type";
5846 case DW_TAG_catch_block:
5847 return "DW_TAG_catch_block";
5848 case DW_TAG_const_type:
5849 return "DW_TAG_const_type";
5850 case DW_TAG_constant:
5851 return "DW_TAG_constant";
5852 case DW_TAG_enumerator:
5853 return "DW_TAG_enumerator";
5854 case DW_TAG_file_type:
5855 return "DW_TAG_file_type";
5857 return "DW_TAG_friend";
5858 case DW_TAG_namelist:
5859 return "DW_TAG_namelist";
5860 case DW_TAG_namelist_item:
5861 return "DW_TAG_namelist_item";
5862 case DW_TAG_packed_type:
5863 return "DW_TAG_packed_type";
5864 case DW_TAG_subprogram:
5865 return "DW_TAG_subprogram";
5866 case DW_TAG_template_type_param:
5867 return "DW_TAG_template_type_param";
5868 case DW_TAG_template_value_param:
5869 return "DW_TAG_template_value_param";
5870 case DW_TAG_thrown_type:
5871 return "DW_TAG_thrown_type";
5872 case DW_TAG_try_block:
5873 return "DW_TAG_try_block";
5874 case DW_TAG_variant_part:
5875 return "DW_TAG_variant_part";
5876 case DW_TAG_variable:
5877 return "DW_TAG_variable";
5878 case DW_TAG_volatile_type:
5879 return "DW_TAG_volatile_type";
5880 case DW_TAG_dwarf_procedure:
5881 return "DW_TAG_dwarf_procedure";
5882 case DW_TAG_restrict_type:
5883 return "DW_TAG_restrict_type";
5884 case DW_TAG_interface_type:
5885 return "DW_TAG_interface_type";
5886 case DW_TAG_namespace:
5887 return "DW_TAG_namespace";
5888 case DW_TAG_imported_module:
5889 return "DW_TAG_imported_module";
5890 case DW_TAG_unspecified_type:
5891 return "DW_TAG_unspecified_type";
5892 case DW_TAG_partial_unit:
5893 return "DW_TAG_partial_unit";
5894 case DW_TAG_imported_unit:
5895 return "DW_TAG_imported_unit";
5896 case DW_TAG_MIPS_loop:
5897 return "DW_TAG_MIPS_loop";
5898 case DW_TAG_format_label:
5899 return "DW_TAG_format_label";
5900 case DW_TAG_function_template:
5901 return "DW_TAG_function_template";
5902 case DW_TAG_class_template:
5903 return "DW_TAG_class_template";
5905 return "DW_TAG_<unknown>";
5909 /* Convert a DWARF attribute code into its string name. */
5912 dwarf_attr_name (register unsigned attr)
5917 return "DW_AT_sibling";
5918 case DW_AT_location:
5919 return "DW_AT_location";
5921 return "DW_AT_name";
5922 case DW_AT_ordering:
5923 return "DW_AT_ordering";
5924 case DW_AT_subscr_data:
5925 return "DW_AT_subscr_data";
5926 case DW_AT_byte_size:
5927 return "DW_AT_byte_size";
5928 case DW_AT_bit_offset:
5929 return "DW_AT_bit_offset";
5930 case DW_AT_bit_size:
5931 return "DW_AT_bit_size";
5932 case DW_AT_element_list:
5933 return "DW_AT_element_list";
5934 case DW_AT_stmt_list:
5935 return "DW_AT_stmt_list";
5937 return "DW_AT_low_pc";
5939 return "DW_AT_high_pc";
5940 case DW_AT_language:
5941 return "DW_AT_language";
5943 return "DW_AT_member";
5945 return "DW_AT_discr";
5946 case DW_AT_discr_value:
5947 return "DW_AT_discr_value";
5948 case DW_AT_visibility:
5949 return "DW_AT_visibility";
5951 return "DW_AT_import";
5952 case DW_AT_string_length:
5953 return "DW_AT_string_length";
5954 case DW_AT_common_reference:
5955 return "DW_AT_common_reference";
5956 case DW_AT_comp_dir:
5957 return "DW_AT_comp_dir";
5958 case DW_AT_const_value:
5959 return "DW_AT_const_value";
5960 case DW_AT_containing_type:
5961 return "DW_AT_containing_type";
5962 case DW_AT_default_value:
5963 return "DW_AT_default_value";
5965 return "DW_AT_inline";
5966 case DW_AT_is_optional:
5967 return "DW_AT_is_optional";
5968 case DW_AT_lower_bound:
5969 return "DW_AT_lower_bound";
5970 case DW_AT_producer:
5971 return "DW_AT_producer";
5972 case DW_AT_prototyped:
5973 return "DW_AT_prototyped";
5974 case DW_AT_return_addr:
5975 return "DW_AT_return_addr";
5976 case DW_AT_start_scope:
5977 return "DW_AT_start_scope";
5978 case DW_AT_stride_size:
5979 return "DW_AT_stride_size";
5980 case DW_AT_upper_bound:
5981 return "DW_AT_upper_bound";
5982 case DW_AT_abstract_origin:
5983 return "DW_AT_abstract_origin";
5984 case DW_AT_accessibility:
5985 return "DW_AT_accessibility";
5986 case DW_AT_address_class:
5987 return "DW_AT_address_class";
5988 case DW_AT_artificial:
5989 return "DW_AT_artificial";
5990 case DW_AT_base_types:
5991 return "DW_AT_base_types";
5992 case DW_AT_calling_convention:
5993 return "DW_AT_calling_convention";
5995 return "DW_AT_count";
5996 case DW_AT_data_member_location:
5997 return "DW_AT_data_member_location";
5998 case DW_AT_decl_column:
5999 return "DW_AT_decl_column";
6000 case DW_AT_decl_file:
6001 return "DW_AT_decl_file";
6002 case DW_AT_decl_line:
6003 return "DW_AT_decl_line";
6004 case DW_AT_declaration:
6005 return "DW_AT_declaration";
6006 case DW_AT_discr_list:
6007 return "DW_AT_discr_list";
6008 case DW_AT_encoding:
6009 return "DW_AT_encoding";
6010 case DW_AT_external:
6011 return "DW_AT_external";
6012 case DW_AT_frame_base:
6013 return "DW_AT_frame_base";
6015 return "DW_AT_friend";
6016 case DW_AT_identifier_case:
6017 return "DW_AT_identifier_case";
6018 case DW_AT_macro_info:
6019 return "DW_AT_macro_info";
6020 case DW_AT_namelist_items:
6021 return "DW_AT_namelist_items";
6022 case DW_AT_priority:
6023 return "DW_AT_priority";
6025 return "DW_AT_segment";
6026 case DW_AT_specification:
6027 return "DW_AT_specification";
6028 case DW_AT_static_link:
6029 return "DW_AT_static_link";
6031 return "DW_AT_type";
6032 case DW_AT_use_location:
6033 return "DW_AT_use_location";
6034 case DW_AT_variable_parameter:
6035 return "DW_AT_variable_parameter";
6036 case DW_AT_virtuality:
6037 return "DW_AT_virtuality";
6038 case DW_AT_vtable_elem_location:
6039 return "DW_AT_vtable_elem_location";
6040 case DW_AT_allocated:
6041 return "DW_AT_allocated";
6042 case DW_AT_associated:
6043 return "DW_AT_associated";
6044 case DW_AT_data_location:
6045 return "DW_AT_data_location";
6047 return "DW_AT_stride";
6048 case DW_AT_entry_pc:
6049 return "DW_AT_entry_pc";
6050 case DW_AT_use_UTF8:
6051 return "DW_AT_use_UTF8";
6052 case DW_AT_extension:
6053 return "DW_AT_extension";
6055 return "DW_AT_ranges";
6056 case DW_AT_trampoline:
6057 return "DW_AT_trampoline";
6058 case DW_AT_call_column:
6059 return "DW_AT_call_column";
6060 case DW_AT_call_file:
6061 return "DW_AT_call_file";
6062 case DW_AT_call_line:
6063 return "DW_AT_call_line";
6065 case DW_AT_MIPS_fde:
6066 return "DW_AT_MIPS_fde";
6067 case DW_AT_MIPS_loop_begin:
6068 return "DW_AT_MIPS_loop_begin";
6069 case DW_AT_MIPS_tail_loop_begin:
6070 return "DW_AT_MIPS_tail_loop_begin";
6071 case DW_AT_MIPS_epilog_begin:
6072 return "DW_AT_MIPS_epilog_begin";
6073 case DW_AT_MIPS_loop_unroll_factor:
6074 return "DW_AT_MIPS_loop_unroll_factor";
6075 case DW_AT_MIPS_software_pipeline_depth:
6076 return "DW_AT_MIPS_software_pipeline_depth";
6077 case DW_AT_MIPS_linkage_name:
6078 return "DW_AT_MIPS_linkage_name";
6081 case DW_AT_sf_names:
6082 return "DW_AT_sf_names";
6083 case DW_AT_src_info:
6084 return "DW_AT_src_info";
6085 case DW_AT_mac_info:
6086 return "DW_AT_mac_info";
6087 case DW_AT_src_coords:
6088 return "DW_AT_src_coords";
6089 case DW_AT_body_begin:
6090 return "DW_AT_body_begin";
6091 case DW_AT_body_end:
6092 return "DW_AT_body_end";
6093 case DW_AT_GNU_vector:
6094 return "DW_AT_GNU_vector";
6096 return "DW_AT_<unknown>";
6100 /* Convert a DWARF value form code into its string name. */
6103 dwarf_form_name (register unsigned form)
6108 return "DW_FORM_addr";
6109 case DW_FORM_block2:
6110 return "DW_FORM_block2";
6111 case DW_FORM_block4:
6112 return "DW_FORM_block4";
6114 return "DW_FORM_data2";
6116 return "DW_FORM_data4";
6118 return "DW_FORM_data8";
6119 case DW_FORM_string:
6120 return "DW_FORM_string";
6122 return "DW_FORM_block";
6123 case DW_FORM_block1:
6124 return "DW_FORM_block1";
6126 return "DW_FORM_data1";
6128 return "DW_FORM_flag";
6130 return "DW_FORM_sdata";
6132 return "DW_FORM_strp";
6134 return "DW_FORM_udata";
6135 case DW_FORM_ref_addr:
6136 return "DW_FORM_ref_addr";
6138 return "DW_FORM_ref1";
6140 return "DW_FORM_ref2";
6142 return "DW_FORM_ref4";
6144 return "DW_FORM_ref8";
6145 case DW_FORM_ref_udata:
6146 return "DW_FORM_ref_udata";
6147 case DW_FORM_indirect:
6148 return "DW_FORM_indirect";
6150 return "DW_FORM_<unknown>";
6154 /* Convert a DWARF stack opcode into its string name. */
6157 dwarf_stack_op_name (register unsigned op)
6162 return "DW_OP_addr";
6164 return "DW_OP_deref";
6166 return "DW_OP_const1u";
6168 return "DW_OP_const1s";
6170 return "DW_OP_const2u";
6172 return "DW_OP_const2s";
6174 return "DW_OP_const4u";
6176 return "DW_OP_const4s";
6178 return "DW_OP_const8u";
6180 return "DW_OP_const8s";
6182 return "DW_OP_constu";
6184 return "DW_OP_consts";
6188 return "DW_OP_drop";
6190 return "DW_OP_over";
6192 return "DW_OP_pick";
6194 return "DW_OP_swap";
6198 return "DW_OP_xderef";
6206 return "DW_OP_minus";
6218 return "DW_OP_plus";
6219 case DW_OP_plus_uconst:
6220 return "DW_OP_plus_uconst";
6226 return "DW_OP_shra";
6244 return "DW_OP_skip";
6246 return "DW_OP_lit0";
6248 return "DW_OP_lit1";
6250 return "DW_OP_lit2";
6252 return "DW_OP_lit3";
6254 return "DW_OP_lit4";
6256 return "DW_OP_lit5";
6258 return "DW_OP_lit6";
6260 return "DW_OP_lit7";
6262 return "DW_OP_lit8";
6264 return "DW_OP_lit9";
6266 return "DW_OP_lit10";
6268 return "DW_OP_lit11";
6270 return "DW_OP_lit12";
6272 return "DW_OP_lit13";
6274 return "DW_OP_lit14";
6276 return "DW_OP_lit15";
6278 return "DW_OP_lit16";
6280 return "DW_OP_lit17";
6282 return "DW_OP_lit18";
6284 return "DW_OP_lit19";
6286 return "DW_OP_lit20";
6288 return "DW_OP_lit21";
6290 return "DW_OP_lit22";
6292 return "DW_OP_lit23";
6294 return "DW_OP_lit24";
6296 return "DW_OP_lit25";
6298 return "DW_OP_lit26";
6300 return "DW_OP_lit27";
6302 return "DW_OP_lit28";
6304 return "DW_OP_lit29";
6306 return "DW_OP_lit30";
6308 return "DW_OP_lit31";
6310 return "DW_OP_reg0";
6312 return "DW_OP_reg1";
6314 return "DW_OP_reg2";
6316 return "DW_OP_reg3";
6318 return "DW_OP_reg4";
6320 return "DW_OP_reg5";
6322 return "DW_OP_reg6";
6324 return "DW_OP_reg7";
6326 return "DW_OP_reg8";
6328 return "DW_OP_reg9";
6330 return "DW_OP_reg10";
6332 return "DW_OP_reg11";
6334 return "DW_OP_reg12";
6336 return "DW_OP_reg13";
6338 return "DW_OP_reg14";
6340 return "DW_OP_reg15";
6342 return "DW_OP_reg16";
6344 return "DW_OP_reg17";
6346 return "DW_OP_reg18";
6348 return "DW_OP_reg19";
6350 return "DW_OP_reg20";
6352 return "DW_OP_reg21";
6354 return "DW_OP_reg22";
6356 return "DW_OP_reg23";
6358 return "DW_OP_reg24";
6360 return "DW_OP_reg25";
6362 return "DW_OP_reg26";
6364 return "DW_OP_reg27";
6366 return "DW_OP_reg28";
6368 return "DW_OP_reg29";
6370 return "DW_OP_reg30";
6372 return "DW_OP_reg31";
6374 return "DW_OP_breg0";
6376 return "DW_OP_breg1";
6378 return "DW_OP_breg2";
6380 return "DW_OP_breg3";
6382 return "DW_OP_breg4";
6384 return "DW_OP_breg5";
6386 return "DW_OP_breg6";
6388 return "DW_OP_breg7";
6390 return "DW_OP_breg8";
6392 return "DW_OP_breg9";
6394 return "DW_OP_breg10";
6396 return "DW_OP_breg11";
6398 return "DW_OP_breg12";
6400 return "DW_OP_breg13";
6402 return "DW_OP_breg14";
6404 return "DW_OP_breg15";
6406 return "DW_OP_breg16";
6408 return "DW_OP_breg17";
6410 return "DW_OP_breg18";
6412 return "DW_OP_breg19";
6414 return "DW_OP_breg20";
6416 return "DW_OP_breg21";
6418 return "DW_OP_breg22";
6420 return "DW_OP_breg23";
6422 return "DW_OP_breg24";
6424 return "DW_OP_breg25";
6426 return "DW_OP_breg26";
6428 return "DW_OP_breg27";
6430 return "DW_OP_breg28";
6432 return "DW_OP_breg29";
6434 return "DW_OP_breg30";
6436 return "DW_OP_breg31";
6438 return "DW_OP_regx";
6440 return "DW_OP_fbreg";
6442 return "DW_OP_bregx";
6444 return "DW_OP_piece";
6445 case DW_OP_deref_size:
6446 return "DW_OP_deref_size";
6447 case DW_OP_xderef_size:
6448 return "DW_OP_xderef_size";
6451 /* DWARF 3 extensions. */
6452 case DW_OP_push_object_address:
6453 return "DW_OP_push_object_address";
6455 return "DW_OP_call2";
6457 return "DW_OP_call4";
6458 case DW_OP_call_ref:
6459 return "DW_OP_call_ref";
6460 /* GNU extensions. */
6461 case DW_OP_GNU_push_tls_address:
6462 return "DW_OP_GNU_push_tls_address";
6464 return "OP_<unknown>";
6469 dwarf_bool_name (unsigned mybool)
6477 /* Convert a DWARF type code into its string name. */
6480 dwarf_type_encoding_name (register unsigned enc)
6484 case DW_ATE_address:
6485 return "DW_ATE_address";
6486 case DW_ATE_boolean:
6487 return "DW_ATE_boolean";
6488 case DW_ATE_complex_float:
6489 return "DW_ATE_complex_float";
6491 return "DW_ATE_float";
6493 return "DW_ATE_signed";
6494 case DW_ATE_signed_char:
6495 return "DW_ATE_signed_char";
6496 case DW_ATE_unsigned:
6497 return "DW_ATE_unsigned";
6498 case DW_ATE_unsigned_char:
6499 return "DW_ATE_unsigned_char";
6500 case DW_ATE_imaginary_float:
6501 return "DW_ATE_imaginary_float";
6503 return "DW_ATE_<unknown>";
6507 /* Convert a DWARF call frame info operation to its string name. */
6511 dwarf_cfi_name (register unsigned cfi_opc)
6515 case DW_CFA_advance_loc:
6516 return "DW_CFA_advance_loc";
6518 return "DW_CFA_offset";
6519 case DW_CFA_restore:
6520 return "DW_CFA_restore";
6522 return "DW_CFA_nop";
6523 case DW_CFA_set_loc:
6524 return "DW_CFA_set_loc";
6525 case DW_CFA_advance_loc1:
6526 return "DW_CFA_advance_loc1";
6527 case DW_CFA_advance_loc2:
6528 return "DW_CFA_advance_loc2";
6529 case DW_CFA_advance_loc4:
6530 return "DW_CFA_advance_loc4";
6531 case DW_CFA_offset_extended:
6532 return "DW_CFA_offset_extended";
6533 case DW_CFA_restore_extended:
6534 return "DW_CFA_restore_extended";
6535 case DW_CFA_undefined:
6536 return "DW_CFA_undefined";
6537 case DW_CFA_same_value:
6538 return "DW_CFA_same_value";
6539 case DW_CFA_register:
6540 return "DW_CFA_register";
6541 case DW_CFA_remember_state:
6542 return "DW_CFA_remember_state";
6543 case DW_CFA_restore_state:
6544 return "DW_CFA_restore_state";
6545 case DW_CFA_def_cfa:
6546 return "DW_CFA_def_cfa";
6547 case DW_CFA_def_cfa_register:
6548 return "DW_CFA_def_cfa_register";
6549 case DW_CFA_def_cfa_offset:
6550 return "DW_CFA_def_cfa_offset";
6553 case DW_CFA_def_cfa_expression:
6554 return "DW_CFA_def_cfa_expression";
6555 case DW_CFA_expression:
6556 return "DW_CFA_expression";
6557 case DW_CFA_offset_extended_sf:
6558 return "DW_CFA_offset_extended_sf";
6559 case DW_CFA_def_cfa_sf:
6560 return "DW_CFA_def_cfa_sf";
6561 case DW_CFA_def_cfa_offset_sf:
6562 return "DW_CFA_def_cfa_offset_sf";
6564 /* SGI/MIPS specific */
6565 case DW_CFA_MIPS_advance_loc8:
6566 return "DW_CFA_MIPS_advance_loc8";
6568 /* GNU extensions */
6569 case DW_CFA_GNU_window_save:
6570 return "DW_CFA_GNU_window_save";
6571 case DW_CFA_GNU_args_size:
6572 return "DW_CFA_GNU_args_size";
6573 case DW_CFA_GNU_negative_offset_extended:
6574 return "DW_CFA_GNU_negative_offset_extended";
6577 return "DW_CFA_<unknown>";
6583 dump_die (struct die_info *die)
6587 fprintf_unfiltered (gdb_stderr, "Die: %s (abbrev = %d, offset = %d)\n",
6588 dwarf_tag_name (die->tag), die->abbrev, die->offset);
6589 fprintf_unfiltered (gdb_stderr, "\thas children: %s\n",
6590 dwarf_bool_name (die->has_children));
6592 fprintf_unfiltered (gdb_stderr, "\tattributes:\n");
6593 for (i = 0; i < die->num_attrs; ++i)
6595 fprintf_unfiltered (gdb_stderr, "\t\t%s (%s) ",
6596 dwarf_attr_name (die->attrs[i].name),
6597 dwarf_form_name (die->attrs[i].form));
6598 switch (die->attrs[i].form)
6600 case DW_FORM_ref_addr:
6602 fprintf_unfiltered (gdb_stderr, "address: ");
6603 print_address_numeric (DW_ADDR (&die->attrs[i]), 1, gdb_stderr);
6605 case DW_FORM_block2:
6606 case DW_FORM_block4:
6608 case DW_FORM_block1:
6609 fprintf_unfiltered (gdb_stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
6620 fprintf_unfiltered (gdb_stderr, "constant: %ld", DW_UNSND (&die->attrs[i]));
6622 case DW_FORM_string:
6624 fprintf_unfiltered (gdb_stderr, "string: \"%s\"",
6625 DW_STRING (&die->attrs[i])
6626 ? DW_STRING (&die->attrs[i]) : "");
6629 if (DW_UNSND (&die->attrs[i]))
6630 fprintf_unfiltered (gdb_stderr, "flag: TRUE");
6632 fprintf_unfiltered (gdb_stderr, "flag: FALSE");
6634 case DW_FORM_indirect:
6635 /* the reader will have reduced the indirect form to
6636 the "base form" so this form should not occur */
6637 fprintf_unfiltered (gdb_stderr, "unexpected attribute form: DW_FORM_indirect");
6640 fprintf_unfiltered (gdb_stderr, "unsupported attribute form: %d.",
6641 die->attrs[i].form);
6643 fprintf_unfiltered (gdb_stderr, "\n");
6648 dump_die_list (struct die_info *die)
6658 store_in_ref_table (unsigned int offset, struct die_info *die)
6661 struct die_info *old;
6663 h = (offset % REF_HASH_SIZE);
6664 old = die_ref_table[h];
6665 die->next_ref = old;
6666 die_ref_table[h] = die;
6671 dwarf2_empty_hash_tables (void)
6673 memset (die_ref_table, 0, sizeof (die_ref_table));
6677 dwarf2_get_ref_die_offset (struct attribute *attr)
6679 unsigned int result = 0;
6683 case DW_FORM_ref_addr:
6684 result = DW_ADDR (attr);
6690 case DW_FORM_ref_udata:
6691 result = cu_header_offset + DW_UNSND (attr);
6694 complaint (&symfile_complaints,
6695 "unsupported die ref attribute form: '%s'",
6696 dwarf_form_name (attr->form));
6701 static struct die_info *
6702 follow_die_ref (unsigned int offset)
6704 struct die_info *die;
6707 h = (offset % REF_HASH_SIZE);
6708 die = die_ref_table[h];
6711 if (die->offset == offset)
6715 die = die->next_ref;
6720 static struct type *
6721 dwarf2_fundamental_type (struct objfile *objfile, int typeid)
6723 if (typeid < 0 || typeid >= FT_NUM_MEMBERS)
6725 error ("Dwarf Error: internal error - invalid fundamental type id %d [in module %s]",
6726 typeid, objfile->name);
6729 /* Look for this particular type in the fundamental type vector. If
6730 one is not found, create and install one appropriate for the
6731 current language and the current target machine. */
6733 if (ftypes[typeid] == NULL)
6735 ftypes[typeid] = cu_language_defn->la_fund_type (objfile, typeid);
6738 return (ftypes[typeid]);
6741 /* Decode simple location descriptions.
6742 Given a pointer to a dwarf block that defines a location, compute
6743 the location and return the value.
6745 FIXME: This is a kludge until we figure out a better
6746 way to handle the location descriptions.
6747 Gdb's design does not mesh well with the DWARF2 notion of a location
6748 computing interpreter, which is a shame because the flexibility goes unused.
6749 FIXME: Implement more operations as necessary.
6751 A location description containing no operations indicates that the
6752 object is optimized out. The global optimized_out flag is set for
6753 those, the return value is meaningless.
6755 When the result is a register number, the global isreg flag is set,
6756 otherwise it is cleared.
6758 When the result is a base register offset, the global offreg flag is set
6759 and the register number is returned in basereg, otherwise it is cleared.
6761 When the DW_OP_fbreg operation is encountered without a corresponding
6762 DW_AT_frame_base attribute, the global islocal flag is set.
6763 Hopefully the machine dependent code knows how to set up a virtual
6764 frame pointer for the local references.
6766 Note that stack[0] is unused except as a default error return.
6767 Note that stack overflow is not yet handled. */
6770 decode_locdesc (struct dwarf_block *blk, struct objfile *objfile,
6771 const struct comp_unit_head *cu_header)
6774 int size = blk->size;
6775 char *data = blk->data;
6776 CORE_ADDR stack[64];
6778 unsigned int bytes_read, unsnd;
6788 is_thread_local = 0;
6829 stack[++stacki] = op - DW_OP_lit0;
6865 stack[++stacki] = op - DW_OP_reg0;
6870 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
6872 stack[++stacki] = unsnd;
6908 basereg = op - DW_OP_breg0;
6909 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
6915 basereg = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
6917 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
6922 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
6924 if (frame_base_reg >= 0)
6927 basereg = frame_base_reg;
6928 stack[stacki] += frame_base_offset;
6932 complaint (&symfile_complaints,
6933 "DW_AT_frame_base missing for DW_OP_fbreg");
6939 stack[++stacki] = read_address (objfile->obfd, &data[i],
6940 cu_header, &bytes_read);
6945 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
6950 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
6955 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
6960 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
6965 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
6970 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
6975 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
6981 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
6986 stack[stacki + 1] = stack[stacki];
6991 stack[stacki - 1] += stack[stacki];
6995 case DW_OP_plus_uconst:
6996 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
7001 stack[stacki - 1] -= stack[stacki];
7007 /* If we're not the last op, then we definitely can't encode
7008 this using GDB's address_class enum. */
7010 dwarf2_complex_location_expr_complaint ();
7013 case DW_OP_GNU_push_tls_address:
7014 is_thread_local = 1;
7015 /* The top of the stack has the offset from the beginning
7016 of the thread control block at which the variable is located. */
7017 /* Nothing should follow this operator, so the top of stack would
7020 dwarf2_complex_location_expr_complaint ();
7024 complaint (&symfile_complaints, "unsupported stack op: '%s'",
7025 dwarf_stack_op_name (op));
7026 return (stack[stacki]);
7029 return (stack[stacki]);
7032 /* memory allocation interface */
7036 dwarf2_free_tmp_obstack (void *ignore)
7038 obstack_free (&dwarf2_tmp_obstack, NULL);
7041 static struct dwarf_block *
7042 dwarf_alloc_block (void)
7044 struct dwarf_block *blk;
7046 blk = (struct dwarf_block *)
7047 obstack_alloc (&dwarf2_tmp_obstack, sizeof (struct dwarf_block));
7051 static struct abbrev_info *
7052 dwarf_alloc_abbrev (void)
7054 struct abbrev_info *abbrev;
7056 abbrev = (struct abbrev_info *) xmalloc (sizeof (struct abbrev_info));
7057 memset (abbrev, 0, sizeof (struct abbrev_info));
7061 static struct die_info *
7062 dwarf_alloc_die (void)
7064 struct die_info *die;
7066 die = (struct die_info *) xmalloc (sizeof (struct die_info));
7067 memset (die, 0, sizeof (struct die_info));
7072 /* Macro support. */
7075 /* Return the full name of file number I in *LH's file name table.
7076 Use COMP_DIR as the name of the current directory of the
7077 compilation. The result is allocated using xmalloc; the caller is
7078 responsible for freeing it. */
7080 file_full_name (int file, struct line_header *lh, const char *comp_dir)
7082 struct file_entry *fe = &lh->file_names[file - 1];
7084 if (IS_ABSOLUTE_PATH (fe->name))
7085 return xstrdup (fe->name);
7093 dir = lh->include_dirs[fe->dir_index - 1];
7099 dir_len = strlen (dir);
7100 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
7101 strcpy (full_name, dir);
7102 full_name[dir_len] = '/';
7103 strcpy (full_name + dir_len + 1, fe->name);
7107 return xstrdup (fe->name);
7112 static struct macro_source_file *
7113 macro_start_file (int file, int line,
7114 struct macro_source_file *current_file,
7115 const char *comp_dir,
7116 struct line_header *lh, struct objfile *objfile)
7118 /* The full name of this source file. */
7119 char *full_name = file_full_name (file, lh, comp_dir);
7121 /* We don't create a macro table for this compilation unit
7122 at all until we actually get a filename. */
7123 if (! pending_macros)
7124 pending_macros = new_macro_table (&objfile->symbol_obstack,
7125 objfile->macro_cache);
7128 /* If we have no current file, then this must be the start_file
7129 directive for the compilation unit's main source file. */
7130 current_file = macro_set_main (pending_macros, full_name);
7132 current_file = macro_include (current_file, line, full_name);
7136 return current_file;
7140 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
7141 followed by a null byte. */
7143 copy_string (const char *buf, int len)
7145 char *s = xmalloc (len + 1);
7146 memcpy (s, buf, len);
7154 consume_improper_spaces (const char *p, const char *body)
7158 complaint (&symfile_complaints,
7159 "macro definition contains spaces in formal argument list:\n`%s'",
7171 parse_macro_definition (struct macro_source_file *file, int line,
7176 /* The body string takes one of two forms. For object-like macro
7177 definitions, it should be:
7179 <macro name> " " <definition>
7181 For function-like macro definitions, it should be:
7183 <macro name> "() " <definition>
7185 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
7187 Spaces may appear only where explicitly indicated, and in the
7190 The Dwarf 2 spec says that an object-like macro's name is always
7191 followed by a space, but versions of GCC around March 2002 omit
7192 the space when the macro's definition is the empty string.
7194 The Dwarf 2 spec says that there should be no spaces between the
7195 formal arguments in a function-like macro's formal argument list,
7196 but versions of GCC around March 2002 include spaces after the
7200 /* Find the extent of the macro name. The macro name is terminated
7201 by either a space or null character (for an object-like macro) or
7202 an opening paren (for a function-like macro). */
7203 for (p = body; *p; p++)
7204 if (*p == ' ' || *p == '(')
7207 if (*p == ' ' || *p == '\0')
7209 /* It's an object-like macro. */
7210 int name_len = p - body;
7211 char *name = copy_string (body, name_len);
7212 const char *replacement;
7215 replacement = body + name_len + 1;
7218 dwarf2_macro_malformed_definition_complaint (body);
7219 replacement = body + name_len;
7222 macro_define_object (file, line, name, replacement);
7228 /* It's a function-like macro. */
7229 char *name = copy_string (body, p - body);
7232 char **argv = xmalloc (argv_size * sizeof (*argv));
7236 p = consume_improper_spaces (p, body);
7238 /* Parse the formal argument list. */
7239 while (*p && *p != ')')
7241 /* Find the extent of the current argument name. */
7242 const char *arg_start = p;
7244 while (*p && *p != ',' && *p != ')' && *p != ' ')
7247 if (! *p || p == arg_start)
7248 dwarf2_macro_malformed_definition_complaint (body);
7251 /* Make sure argv has room for the new argument. */
7252 if (argc >= argv_size)
7255 argv = xrealloc (argv, argv_size * sizeof (*argv));
7258 argv[argc++] = copy_string (arg_start, p - arg_start);
7261 p = consume_improper_spaces (p, body);
7263 /* Consume the comma, if present. */
7268 p = consume_improper_spaces (p, body);
7277 /* Perfectly formed definition, no complaints. */
7278 macro_define_function (file, line, name,
7279 argc, (const char **) argv,
7281 else if (*p == '\0')
7283 /* Complain, but do define it. */
7284 dwarf2_macro_malformed_definition_complaint (body);
7285 macro_define_function (file, line, name,
7286 argc, (const char **) argv,
7290 /* Just complain. */
7291 dwarf2_macro_malformed_definition_complaint (body);
7294 /* Just complain. */
7295 dwarf2_macro_malformed_definition_complaint (body);
7301 for (i = 0; i < argc; i++)
7307 dwarf2_macro_malformed_definition_complaint (body);
7312 dwarf_decode_macros (struct line_header *lh, unsigned int offset,
7313 char *comp_dir, bfd *abfd,
7314 const struct comp_unit_head *cu_header,
7315 struct objfile *objfile)
7317 char *mac_ptr, *mac_end;
7318 struct macro_source_file *current_file = 0;
7320 if (dwarf_macinfo_buffer == NULL)
7322 complaint (&symfile_complaints, "missing .debug_macinfo section");
7326 mac_ptr = dwarf_macinfo_buffer + offset;
7327 mac_end = dwarf_macinfo_buffer + dwarf_macinfo_size;
7331 enum dwarf_macinfo_record_type macinfo_type;
7333 /* Do we at least have room for a macinfo type byte? */
7334 if (mac_ptr >= mac_end)
7336 dwarf2_macros_too_long_complaint ();
7340 macinfo_type = read_1_byte (abfd, mac_ptr);
7343 switch (macinfo_type)
7345 /* A zero macinfo type indicates the end of the macro
7350 case DW_MACINFO_define:
7351 case DW_MACINFO_undef:
7357 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
7358 mac_ptr += bytes_read;
7359 body = read_string (abfd, mac_ptr, &bytes_read);
7360 mac_ptr += bytes_read;
7363 complaint (&symfile_complaints,
7364 "debug info gives macro %s outside of any file: %s",
7366 DW_MACINFO_define ? "definition" : macinfo_type ==
7367 DW_MACINFO_undef ? "undefinition" :
7368 "something-or-other", body);
7371 if (macinfo_type == DW_MACINFO_define)
7372 parse_macro_definition (current_file, line, body);
7373 else if (macinfo_type == DW_MACINFO_undef)
7374 macro_undef (current_file, line, body);
7379 case DW_MACINFO_start_file:
7384 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
7385 mac_ptr += bytes_read;
7386 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
7387 mac_ptr += bytes_read;
7389 current_file = macro_start_file (file, line,
7390 current_file, comp_dir,
7395 case DW_MACINFO_end_file:
7397 complaint (&symfile_complaints,
7398 "macro debug info has an unmatched `close_file' directive");
7401 current_file = current_file->included_by;
7404 enum dwarf_macinfo_record_type next_type;
7406 /* GCC circa March 2002 doesn't produce the zero
7407 type byte marking the end of the compilation
7408 unit. Complain if it's not there, but exit no
7411 /* Do we at least have room for a macinfo type byte? */
7412 if (mac_ptr >= mac_end)
7414 dwarf2_macros_too_long_complaint ();
7418 /* We don't increment mac_ptr here, so this is just
7420 next_type = read_1_byte (abfd, mac_ptr);
7422 complaint (&symfile_complaints,
7423 "no terminating 0-type entry for macros in `.debug_macinfo' section");
7430 case DW_MACINFO_vendor_ext:
7436 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
7437 mac_ptr += bytes_read;
7438 string = read_string (abfd, mac_ptr, &bytes_read);
7439 mac_ptr += bytes_read;
7441 /* We don't recognize any vendor extensions. */
7448 /* Check if the attribute's form is a DW_FORM_block*
7449 if so return true else false. */
7451 attr_form_is_block (struct attribute *attr)
7453 return (attr == NULL ? 0 :
7454 attr->form == DW_FORM_block1
7455 || attr->form == DW_FORM_block2
7456 || attr->form == DW_FORM_block4
7457 || attr->form == DW_FORM_block);
7461 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
7462 const struct comp_unit_head *cu_header,
7463 struct objfile *objfile)
7465 if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
7467 struct dwarf2_loclist_baton *baton;
7469 baton = obstack_alloc (&objfile->symbol_obstack,
7470 sizeof (struct dwarf2_loclist_baton));
7471 baton->objfile = objfile;
7473 /* We don't know how long the location list is, but make sure we
7474 don't run off the edge of the section. */
7475 baton->size = dwarf_loc_size - DW_UNSND (attr);
7476 baton->data = dwarf_loc_buffer + DW_UNSND (attr);
7477 baton->base_address = cu_header->base_address;
7478 if (cu_header->base_known == 0)
7479 complaint (&symfile_complaints,
7480 "Location list used without specifying the CU base address.");
7482 SYMBOL_LOCATION_FUNCS (sym) = &dwarf2_loclist_funcs;
7483 SYMBOL_LOCATION_BATON (sym) = baton;
7487 struct dwarf2_locexpr_baton *baton;
7489 baton = obstack_alloc (&objfile->symbol_obstack,
7490 sizeof (struct dwarf2_locexpr_baton));
7491 baton->objfile = objfile;
7493 if (attr_form_is_block (attr))
7495 /* Note that we're just copying the block's data pointer
7496 here, not the actual data. We're still pointing into the
7497 dwarf_info_buffer for SYM's objfile; right now we never
7498 release that buffer, but when we do clean up properly
7499 this may need to change. */
7500 baton->size = DW_BLOCK (attr)->size;
7501 baton->data = DW_BLOCK (attr)->data;
7505 dwarf2_invalid_attrib_class_complaint ("location description",
7506 SYMBOL_NATURAL_NAME (sym));
7511 SYMBOL_LOCATION_FUNCS (sym) = &dwarf2_locexpr_funcs;
7512 SYMBOL_LOCATION_BATON (sym) = baton;