1 /* DWARF 2 debugging format support for GDB.
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
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"
45 #include "gdb_string.h"
46 #include "gdb_assert.h"
47 #include <sys/types.h>
49 #ifndef DWARF2_REG_TO_REGNUM
50 #define DWARF2_REG_TO_REGNUM(REG) (REG)
54 /* .debug_info header for a compilation unit
55 Because of alignment constraints, this structure has padding and cannot
56 be mapped directly onto the beginning of the .debug_info section. */
57 typedef struct comp_unit_header
59 unsigned int length
; /* length of the .debug_info
61 unsigned short version
; /* version number -- 2 for DWARF
63 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
64 unsigned char addr_size
; /* byte size of an address -- 4 */
67 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
70 /* .debug_pubnames header
71 Because of alignment constraints, this structure has padding and cannot
72 be mapped directly onto the beginning of the .debug_info section. */
73 typedef struct pubnames_header
75 unsigned int length
; /* length of the .debug_pubnames
77 unsigned char version
; /* version number -- 2 for DWARF
79 unsigned int info_offset
; /* offset into .debug_info section */
80 unsigned int info_size
; /* byte size of .debug_info section
84 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
86 /* .debug_pubnames header
87 Because of alignment constraints, this structure has padding and cannot
88 be mapped directly onto the beginning of the .debug_info section. */
89 typedef struct aranges_header
91 unsigned int length
; /* byte len of the .debug_aranges
93 unsigned short version
; /* version number -- 2 for DWARF
95 unsigned int info_offset
; /* offset into .debug_info section */
96 unsigned char addr_size
; /* byte size of an address */
97 unsigned char seg_size
; /* byte size of segment descriptor */
100 #define _ACTUAL_ARANGES_HEADER_SIZE 12
102 /* .debug_line statement program prologue
103 Because of alignment constraints, this structure has padding and cannot
104 be mapped directly onto the beginning of the .debug_info section. */
105 typedef struct statement_prologue
107 unsigned int total_length
; /* byte length of the statement
109 unsigned short version
; /* version number -- 2 for DWARF
111 unsigned int prologue_length
; /* # bytes between prologue &
113 unsigned char minimum_instruction_length
; /* byte size of
115 unsigned char default_is_stmt
; /* initial value of is_stmt
118 unsigned char line_range
;
119 unsigned char opcode_base
; /* number assigned to first special
121 unsigned char *standard_opcode_lengths
;
125 /* offsets and sizes of debugging sections */
127 static file_ptr dwarf_info_offset
;
128 static file_ptr dwarf_abbrev_offset
;
129 static file_ptr dwarf_line_offset
;
130 static file_ptr dwarf_pubnames_offset
;
131 static file_ptr dwarf_aranges_offset
;
132 static file_ptr dwarf_loc_offset
;
133 static file_ptr dwarf_macinfo_offset
;
134 static file_ptr dwarf_str_offset
;
135 file_ptr dwarf_frame_offset
;
136 file_ptr dwarf_eh_frame_offset
;
138 static unsigned int dwarf_info_size
;
139 static unsigned int dwarf_abbrev_size
;
140 static unsigned int dwarf_line_size
;
141 static unsigned int dwarf_pubnames_size
;
142 static unsigned int dwarf_aranges_size
;
143 static unsigned int dwarf_loc_size
;
144 static unsigned int dwarf_macinfo_size
;
145 static unsigned int dwarf_str_size
;
146 unsigned int dwarf_frame_size
;
147 unsigned int dwarf_eh_frame_size
;
149 /* names of the debugging sections */
151 #define INFO_SECTION ".debug_info"
152 #define ABBREV_SECTION ".debug_abbrev"
153 #define LINE_SECTION ".debug_line"
154 #define PUBNAMES_SECTION ".debug_pubnames"
155 #define ARANGES_SECTION ".debug_aranges"
156 #define LOC_SECTION ".debug_loc"
157 #define MACINFO_SECTION ".debug_macinfo"
158 #define STR_SECTION ".debug_str"
159 #define FRAME_SECTION ".debug_frame"
160 #define EH_FRAME_SECTION ".eh_frame"
162 /* local data types */
164 /* The data in a compilation unit header, after target2host
165 translation, looks like this. */
166 struct comp_unit_head
168 unsigned long length
;
170 unsigned int abbrev_offset
;
171 unsigned char addr_size
;
172 unsigned char signed_addr_p
;
173 unsigned int offset_size
; /* size of file offsets; either 4 or 8 */
174 unsigned int initial_length_size
; /* size of the length field; either
178 /* The data in the .debug_line statement prologue looks like this. */
181 unsigned int total_length
;
182 unsigned short version
;
183 unsigned int prologue_length
;
184 unsigned char minimum_instruction_length
;
185 unsigned char default_is_stmt
;
187 unsigned char line_range
;
188 unsigned char opcode_base
;
189 unsigned char *standard_opcode_lengths
;
192 /* When we construct a partial symbol table entry we only
193 need this much information. */
194 struct partial_die_info
197 unsigned char has_children
;
198 unsigned char is_external
;
199 unsigned char is_declaration
;
200 unsigned char has_type
;
207 struct dwarf_block
*locdesc
;
208 unsigned int language
;
212 /* This data structure holds the information of an abbrev. */
215 unsigned int number
; /* number identifying abbrev */
216 enum dwarf_tag tag
; /* dwarf tag */
217 int has_children
; /* boolean */
218 unsigned int num_attrs
; /* number of attributes */
219 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
220 struct abbrev_info
*next
; /* next in chain */
225 enum dwarf_attribute name
;
226 enum dwarf_form form
;
229 /* This data structure holds a complete die structure. */
232 enum dwarf_tag tag
; /* Tag indicating type of die */
233 unsigned short has_children
; /* Does the die have children */
234 unsigned int abbrev
; /* Abbrev number */
235 unsigned int offset
; /* Offset in .debug_info section */
236 unsigned int num_attrs
; /* Number of attributes */
237 struct attribute
*attrs
; /* An array of attributes */
238 struct die_info
*next_ref
; /* Next die in ref hash table */
239 struct die_info
*next
; /* Next die in linked list */
240 struct type
*type
; /* Cached type information */
243 /* Attributes have a name and a value */
246 enum dwarf_attribute name
;
247 enum dwarf_form form
;
251 struct dwarf_block
*blk
;
259 /* Get at parts of an attribute structure */
261 #define DW_STRING(attr) ((attr)->u.str)
262 #define DW_UNSND(attr) ((attr)->u.unsnd)
263 #define DW_BLOCK(attr) ((attr)->u.blk)
264 #define DW_SND(attr) ((attr)->u.snd)
265 #define DW_ADDR(attr) ((attr)->u.addr)
267 /* Blocks are a bunch of untyped bytes. */
274 /* We only hold one compilation unit's abbrevs in
275 memory at any one time. */
276 #ifndef ABBREV_HASH_SIZE
277 #define ABBREV_HASH_SIZE 121
279 #ifndef ATTR_ALLOC_CHUNK
280 #define ATTR_ALLOC_CHUNK 4
283 static struct abbrev_info
*dwarf2_abbrevs
[ABBREV_HASH_SIZE
];
285 /* A hash table of die offsets for following references. */
286 #ifndef REF_HASH_SIZE
287 #define REF_HASH_SIZE 1021
290 static struct die_info
*die_ref_table
[REF_HASH_SIZE
];
292 /* Obstack for allocating temporary storage used during symbol reading. */
293 static struct obstack dwarf2_tmp_obstack
;
295 /* Offset to the first byte of the current compilation unit header,
296 for resolving relative reference dies. */
297 static unsigned int cu_header_offset
;
299 /* Allocate fields for structs, unions and enums in this size. */
300 #ifndef DW_FIELD_ALLOC_CHUNK
301 #define DW_FIELD_ALLOC_CHUNK 4
304 /* The language we are debugging. */
305 static enum language cu_language
;
306 static const struct language_defn
*cu_language_defn
;
308 /* Actually data from the sections. */
309 static char *dwarf_info_buffer
;
310 static char *dwarf_abbrev_buffer
;
311 static char *dwarf_line_buffer
;
312 static char *dwarf_str_buffer
;
314 /* A zeroed version of a partial die for initialization purposes. */
315 static struct partial_die_info zeroed_partial_die
;
317 /* The generic symbol table building routines have separate lists for
318 file scope symbols and all all other scopes (local scopes). So
319 we need to select the right one to pass to add_symbol_to_list().
320 We do it by keeping a pointer to the correct list in list_in_scope.
322 FIXME: The original dwarf code just treated the file scope as the first
323 local scope, and all other local scopes as nested local scopes, and worked
324 fine. Check to see if we really need to distinguish these
326 static struct pending
**list_in_scope
= &file_symbols
;
328 /* FIXME: decode_locdesc sets these variables to describe the location
329 to the caller. These ought to be a structure or something. If
330 none of the flags are set, the object lives at the address returned
331 by decode_locdesc. */
333 static int optimized_out
; /* No ops in location in expression,
334 so object was optimized out. */
335 static int isreg
; /* Object lives in register.
336 decode_locdesc's return value is
337 the register number. */
338 static int offreg
; /* Object's address is the sum of the
339 register specified by basereg, plus
340 the offset returned. */
341 static int basereg
; /* See `offreg'. */
342 static int isderef
; /* Value described by flags above is
343 the address of a pointer to the object. */
344 static int islocal
; /* Variable is at the returned offset
345 from the frame start, but there's
346 no identified frame pointer for
347 this function, so we can't say
348 which register it's relative to;
351 /* DW_AT_frame_base values for the current function.
352 frame_base_reg is -1 if DW_AT_frame_base is missing, otherwise it
353 contains the register number for the frame register.
354 frame_base_offset is the offset from the frame register to the
355 virtual stack frame. */
356 static int frame_base_reg
;
357 static CORE_ADDR frame_base_offset
;
359 /* This value is added to each symbol value. FIXME: Generalize to
360 the section_offsets structure used by dbxread (once this is done,
361 pass the appropriate section number to end_symtab). */
362 static CORE_ADDR baseaddr
; /* Add to each symbol value */
364 /* We put a pointer to this structure in the read_symtab_private field
366 The complete dwarf information for an objfile is kept in the
367 psymbol_obstack, so that absolute die references can be handled.
368 Most of the information in this structure is related to an entire
369 object file and could be passed via the sym_private field of the objfile.
370 It is however conceivable that dwarf2 might not be the only type
371 of symbols read from an object file. */
375 /* Pointer to start of dwarf info buffer for the objfile. */
377 char *dwarf_info_buffer
;
379 /* Offset in dwarf_info_buffer for this compilation unit. */
381 unsigned long dwarf_info_offset
;
383 /* Pointer to start of dwarf abbreviation buffer for the objfile. */
385 char *dwarf_abbrev_buffer
;
387 /* Size of dwarf abbreviation section for the objfile. */
389 unsigned int dwarf_abbrev_size
;
391 /* Pointer to start of dwarf line buffer for the objfile. */
393 char *dwarf_line_buffer
;
395 /* Pointer to start of dwarf string buffer for the objfile. */
397 char *dwarf_str_buffer
;
399 /* Size of dwarf string section for the objfile. */
401 unsigned int dwarf_str_size
;
404 #define PST_PRIVATE(p) ((struct dwarf2_pinfo *)(p)->read_symtab_private)
405 #define DWARF_INFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_info_buffer)
406 #define DWARF_INFO_OFFSET(p) (PST_PRIVATE(p)->dwarf_info_offset)
407 #define DWARF_ABBREV_BUFFER(p) (PST_PRIVATE(p)->dwarf_abbrev_buffer)
408 #define DWARF_ABBREV_SIZE(p) (PST_PRIVATE(p)->dwarf_abbrev_size)
409 #define DWARF_LINE_BUFFER(p) (PST_PRIVATE(p)->dwarf_line_buffer)
410 #define DWARF_STR_BUFFER(p) (PST_PRIVATE(p)->dwarf_str_buffer)
411 #define DWARF_STR_SIZE(p) (PST_PRIVATE(p)->dwarf_str_size)
413 /* Maintain an array of referenced fundamental types for the current
414 compilation unit being read. For DWARF version 1, we have to construct
415 the fundamental types on the fly, since no information about the
416 fundamental types is supplied. Each such fundamental type is created by
417 calling a language dependent routine to create the type, and then a
418 pointer to that type is then placed in the array at the index specified
419 by it's FT_<TYPENAME> value. The array has a fixed size set by the
420 FT_NUM_MEMBERS compile time constant, which is the number of predefined
421 fundamental types gdb knows how to construct. */
422 static struct type
*ftypes
[FT_NUM_MEMBERS
]; /* Fundamental types */
424 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
425 but this would require a corresponding change in unpack_field_as_long
427 static int bits_per_byte
= 8;
429 /* The routines that read and process dies for a C struct or C++ class
430 pass lists of data member fields and lists of member function fields
431 in an instance of a field_info structure, as defined below. */
434 /* List of data member and baseclasses fields. */
437 struct nextfield
*next
;
444 /* Number of fields. */
447 /* Number of baseclasses. */
450 /* Set if the accesibility of one of the fields is not public. */
451 int non_public_fields
;
453 /* Member function fields array, entries are allocated in the order they
454 are encountered in the object file. */
457 struct nextfnfield
*next
;
458 struct fn_field fnfield
;
462 /* Member function fieldlist array, contains name of possibly overloaded
463 member function, number of overloaded member functions and a pointer
464 to the head of the member function field chain. */
469 struct nextfnfield
*head
;
473 /* Number of entries in the fnfieldlists array. */
477 /* Various complaints about symbol reading that don't abort the process */
479 static struct complaint dwarf2_const_ignored
=
481 "type qualifier 'const' ignored", 0, 0
483 static struct complaint dwarf2_volatile_ignored
=
485 "type qualifier 'volatile' ignored", 0, 0
487 static struct complaint dwarf2_non_const_array_bound_ignored
=
489 "non-constant array bounds form '%s' ignored", 0, 0
491 static struct complaint dwarf2_missing_line_number_section
=
493 "missing .debug_line section", 0, 0
495 static struct complaint dwarf2_mangled_line_number_section
=
497 "mangled .debug_line section", 0, 0
499 static struct complaint dwarf2_unsupported_die_ref_attr
=
501 "unsupported die ref attribute form: '%s'", 0, 0
503 static struct complaint dwarf2_unsupported_stack_op
=
505 "unsupported stack op: '%s'", 0, 0
507 static struct complaint dwarf2_complex_location_expr
=
509 "location expression too complex", 0, 0
511 static struct complaint dwarf2_unsupported_tag
=
513 "unsupported tag: '%s'", 0, 0
515 static struct complaint dwarf2_unsupported_at_encoding
=
517 "unsupported DW_AT_encoding: '%s'", 0, 0
519 static struct complaint dwarf2_unsupported_at_frame_base
=
521 "unsupported DW_AT_frame_base for function '%s'", 0, 0
523 static struct complaint dwarf2_unexpected_tag
=
525 "unexepected tag in read_type_die: '%s'", 0, 0
527 static struct complaint dwarf2_missing_at_frame_base
=
529 "DW_AT_frame_base missing for DW_OP_fbreg", 0, 0
531 static struct complaint dwarf2_bad_static_member_name
=
533 "unrecognized static data member name '%s'", 0, 0
535 static struct complaint dwarf2_unsupported_accessibility
=
537 "unsupported accessibility %d", 0, 0
539 static struct complaint dwarf2_bad_member_name_complaint
=
541 "cannot extract member name from '%s'", 0, 0
543 static struct complaint dwarf2_missing_member_fn_type_complaint
=
545 "member function type missing for '%s'", 0, 0
547 static struct complaint dwarf2_vtbl_not_found_complaint
=
549 "virtual function table pointer not found when defining class '%s'", 0, 0
551 static struct complaint dwarf2_absolute_sibling_complaint
=
553 "ignoring absolute DW_AT_sibling", 0, 0
555 static struct complaint dwarf2_const_value_length_mismatch
=
557 "const value length mismatch for '%s', got %d, expected %d", 0, 0
559 static struct complaint dwarf2_unsupported_const_value_attr
=
561 "unsupported const value attribute form: '%s'", 0, 0
564 /* local function prototypes */
566 static void dwarf2_locate_sections (bfd
*, asection
*, PTR
);
569 static void dwarf2_build_psymtabs_easy (struct objfile
*, int);
572 static void dwarf2_build_psymtabs_hard (struct objfile
*, int);
574 static char *scan_partial_symbols (char *, struct objfile
*,
575 CORE_ADDR
*, CORE_ADDR
*,
576 const struct comp_unit_head
*);
578 static void add_partial_symbol (struct partial_die_info
*, struct objfile
*,
579 const struct comp_unit_head
*);
581 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
583 static void psymtab_to_symtab_1 (struct partial_symtab
*);
585 char *dwarf2_read_section (struct objfile
*, file_ptr
, unsigned int);
587 static void dwarf2_read_abbrevs (bfd
*, unsigned int);
589 static void dwarf2_empty_abbrev_table (PTR
);
591 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int);
593 static char *read_partial_die (struct partial_die_info
*,
595 const struct comp_unit_head
*);
597 static char *read_full_die (struct die_info
**, bfd
*, char *,
598 const struct comp_unit_head
*);
600 static char *read_attribute (struct attribute
*, struct attr_abbrev
*,
601 bfd
*, char *, const struct comp_unit_head
*);
603 static char *read_attribute_value (struct attribute
*, unsigned,
604 bfd
*, char *, const struct comp_unit_head
*);
606 static unsigned int read_1_byte (bfd
*, char *);
608 static int read_1_signed_byte (bfd
*, char *);
610 static unsigned int read_2_bytes (bfd
*, char *);
612 static unsigned int read_4_bytes (bfd
*, char *);
614 static unsigned long read_8_bytes (bfd
*, char *);
616 static CORE_ADDR
read_address (bfd
*, char *ptr
, const struct comp_unit_head
*,
619 static LONGEST
read_initial_length (bfd
*, char *,
620 struct comp_unit_head
*, int *bytes_read
);
622 static LONGEST
read_offset (bfd
*, char *, const struct comp_unit_head
*,
625 static char *read_n_bytes (bfd
*, char *, unsigned int);
627 static char *read_string (bfd
*, char *, unsigned int *);
629 static char *read_indirect_string (bfd
*, char *, const struct comp_unit_head
*,
632 static unsigned long read_unsigned_leb128 (bfd
*, char *, unsigned int *);
634 static long read_signed_leb128 (bfd
*, char *, unsigned int *);
636 static void set_cu_language (unsigned int);
638 static struct attribute
*dwarf_attr (struct die_info
*, unsigned int);
640 static int die_is_declaration (struct die_info
*);
642 static void dwarf_decode_lines (unsigned int, char *, bfd
*,
643 const struct comp_unit_head
*);
645 static void dwarf2_start_subfile (char *, char *);
647 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
648 struct objfile
*, const struct comp_unit_head
*);
650 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
651 struct objfile
*, const struct comp_unit_head
*);
653 static void dwarf2_const_value_data (struct attribute
*attr
,
657 static struct type
*die_type (struct die_info
*, struct objfile
*,
658 const struct comp_unit_head
*);
660 static struct type
*die_containing_type (struct die_info
*, struct objfile
*,
661 const struct comp_unit_head
*);
664 static struct type
*type_at_offset (unsigned int, struct objfile
*);
667 static struct type
*tag_type_to_type (struct die_info
*, struct objfile
*,
668 const struct comp_unit_head
*);
670 static void read_type_die (struct die_info
*, struct objfile
*,
671 const struct comp_unit_head
*);
673 static void read_typedef (struct die_info
*, struct objfile
*,
674 const struct comp_unit_head
*);
676 static void read_base_type (struct die_info
*, struct objfile
*);
678 static void read_file_scope (struct die_info
*, struct objfile
*,
679 const struct comp_unit_head
*);
681 static void read_func_scope (struct die_info
*, struct objfile
*,
682 const struct comp_unit_head
*);
684 static void read_lexical_block_scope (struct die_info
*, struct objfile
*,
685 const struct comp_unit_head
*);
687 static int dwarf2_get_pc_bounds (struct die_info
*,
688 CORE_ADDR
*, CORE_ADDR
*, struct objfile
*);
690 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
691 struct objfile
*, const struct comp_unit_head
*);
693 static void dwarf2_attach_fields_to_type (struct field_info
*,
694 struct type
*, struct objfile
*);
696 static void dwarf2_add_member_fn (struct field_info
*,
697 struct die_info
*, struct type
*,
698 struct objfile
*objfile
,
699 const struct comp_unit_head
*);
701 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
702 struct type
*, struct objfile
*);
704 static void read_structure_scope (struct die_info
*, struct objfile
*,
705 const struct comp_unit_head
*);
707 static void read_common_block (struct die_info
*, struct objfile
*,
708 const struct comp_unit_head
*);
710 static void read_enumeration (struct die_info
*, struct objfile
*,
711 const struct comp_unit_head
*);
713 static struct type
*dwarf_base_type (int, int, struct objfile
*);
715 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct objfile
*,
716 const struct comp_unit_head
*);
718 static void read_array_type (struct die_info
*, struct objfile
*,
719 const struct comp_unit_head
*);
721 static void read_tag_pointer_type (struct die_info
*, struct objfile
*,
722 const struct comp_unit_head
*);
724 static void read_tag_ptr_to_member_type (struct die_info
*, struct objfile
*,
725 const struct comp_unit_head
*);
727 static void read_tag_reference_type (struct die_info
*, struct objfile
*,
728 const struct comp_unit_head
*);
730 static void read_tag_const_type (struct die_info
*, struct objfile
*,
731 const struct comp_unit_head
*);
733 static void read_tag_volatile_type (struct die_info
*, struct objfile
*,
734 const struct comp_unit_head
*);
736 static void read_tag_string_type (struct die_info
*, struct objfile
*);
738 static void read_subroutine_type (struct die_info
*, struct objfile
*,
739 const struct comp_unit_head
*);
741 static struct die_info
*read_comp_unit (char *, bfd
*,
742 const struct comp_unit_head
*);
744 static void free_die_list (struct die_info
*);
746 static struct cleanup
*make_cleanup_free_die_list (struct die_info
*);
748 static void process_die (struct die_info
*, struct objfile
*,
749 const struct comp_unit_head
*);
751 static char *dwarf2_linkage_name (struct die_info
*);
753 static char *dwarf_tag_name (unsigned int);
755 static char *dwarf_attr_name (unsigned int);
757 static char *dwarf_form_name (unsigned int);
759 static char *dwarf_stack_op_name (unsigned int);
761 static char *dwarf_bool_name (unsigned int);
763 static char *dwarf_type_encoding_name (unsigned int);
766 static char *dwarf_cfi_name (unsigned int);
768 struct die_info
*copy_die (struct die_info
*);
771 static struct die_info
*sibling_die (struct die_info
*);
773 static void dump_die (struct die_info
*);
775 static void dump_die_list (struct die_info
*);
777 static void store_in_ref_table (unsigned int, struct die_info
*);
779 static void dwarf2_empty_hash_tables (void);
781 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
783 static struct die_info
*follow_die_ref (unsigned int);
785 static struct type
*dwarf2_fundamental_type (struct objfile
*, int);
787 /* memory allocation interface */
789 static void dwarf2_free_tmp_obstack (PTR
);
791 static struct dwarf_block
*dwarf_alloc_block (void);
793 static struct abbrev_info
*dwarf_alloc_abbrev (void);
795 static struct die_info
*dwarf_alloc_die (void);
797 /* Try to locate the sections we need for DWARF 2 debugging
798 information and return true if we have enough to do something. */
801 dwarf2_has_info (bfd
*abfd
)
803 dwarf_info_offset
= dwarf_abbrev_offset
= dwarf_line_offset
= 0;
804 dwarf_str_offset
= 0;
805 dwarf_frame_offset
= dwarf_eh_frame_offset
= 0;
806 bfd_map_over_sections (abfd
, dwarf2_locate_sections
, NULL
);
807 if (dwarf_info_offset
&& dwarf_abbrev_offset
)
817 /* This function is mapped across the sections and remembers the
818 offset and size of each of the debugging sections we are interested
822 dwarf2_locate_sections (bfd
*ignore_abfd
, asection
*sectp
, PTR ignore_ptr
)
824 if (STREQ (sectp
->name
, INFO_SECTION
))
826 dwarf_info_offset
= sectp
->filepos
;
827 dwarf_info_size
= bfd_get_section_size_before_reloc (sectp
);
829 else if (STREQ (sectp
->name
, ABBREV_SECTION
))
831 dwarf_abbrev_offset
= sectp
->filepos
;
832 dwarf_abbrev_size
= bfd_get_section_size_before_reloc (sectp
);
834 else if (STREQ (sectp
->name
, LINE_SECTION
))
836 dwarf_line_offset
= sectp
->filepos
;
837 dwarf_line_size
= bfd_get_section_size_before_reloc (sectp
);
839 else if (STREQ (sectp
->name
, PUBNAMES_SECTION
))
841 dwarf_pubnames_offset
= sectp
->filepos
;
842 dwarf_pubnames_size
= bfd_get_section_size_before_reloc (sectp
);
844 else if (STREQ (sectp
->name
, ARANGES_SECTION
))
846 dwarf_aranges_offset
= sectp
->filepos
;
847 dwarf_aranges_size
= bfd_get_section_size_before_reloc (sectp
);
849 else if (STREQ (sectp
->name
, LOC_SECTION
))
851 dwarf_loc_offset
= sectp
->filepos
;
852 dwarf_loc_size
= bfd_get_section_size_before_reloc (sectp
);
854 else if (STREQ (sectp
->name
, MACINFO_SECTION
))
856 dwarf_macinfo_offset
= sectp
->filepos
;
857 dwarf_macinfo_size
= bfd_get_section_size_before_reloc (sectp
);
859 else if (STREQ (sectp
->name
, STR_SECTION
))
861 dwarf_str_offset
= sectp
->filepos
;
862 dwarf_str_size
= bfd_get_section_size_before_reloc (sectp
);
864 else if (STREQ (sectp
->name
, FRAME_SECTION
))
866 dwarf_frame_offset
= sectp
->filepos
;
867 dwarf_frame_size
= bfd_get_section_size_before_reloc (sectp
);
869 else if (STREQ (sectp
->name
, EH_FRAME_SECTION
))
871 dwarf_eh_frame_offset
= sectp
->filepos
;
872 dwarf_eh_frame_size
= bfd_get_section_size_before_reloc (sectp
);
876 /* Build a partial symbol table. */
879 dwarf2_build_psymtabs (struct objfile
*objfile
, int mainline
)
882 /* We definitely need the .debug_info and .debug_abbrev sections */
884 dwarf_info_buffer
= dwarf2_read_section (objfile
,
887 dwarf_abbrev_buffer
= dwarf2_read_section (objfile
,
890 dwarf_line_buffer
= dwarf2_read_section (objfile
,
894 if (dwarf_str_offset
)
895 dwarf_str_buffer
= dwarf2_read_section (objfile
,
899 dwarf_str_buffer
= NULL
;
902 || (objfile
->global_psymbols
.size
== 0
903 && objfile
->static_psymbols
.size
== 0))
905 init_psymbol_list (objfile
, 1024);
909 if (dwarf_aranges_offset
&& dwarf_pubnames_offset
)
911 /* Things are significantly easier if we have .debug_aranges and
912 .debug_pubnames sections */
914 dwarf2_build_psymtabs_easy (objfile
, mainline
);
918 /* only test this case for now */
920 /* In this case we have to work a bit harder */
921 dwarf2_build_psymtabs_hard (objfile
, mainline
);
926 /* Build the partial symbol table from the information in the
927 .debug_pubnames and .debug_aranges sections. */
930 dwarf2_build_psymtabs_easy (struct objfile
*objfile
, int mainline
)
932 bfd
*abfd
= objfile
->obfd
;
933 char *aranges_buffer
, *pubnames_buffer
;
934 char *aranges_ptr
, *pubnames_ptr
;
935 unsigned int entry_length
, version
, info_offset
, info_size
;
937 pubnames_buffer
= dwarf2_read_section (objfile
,
938 dwarf_pubnames_offset
,
939 dwarf_pubnames_size
);
940 pubnames_ptr
= pubnames_buffer
;
941 while ((pubnames_ptr
- pubnames_buffer
) < dwarf_pubnames_size
)
943 struct comp_unit_head cu_header
;
946 entry_length
= read_initial_length (abfd
, pubnames_ptr
, &cu_header
,
948 pubnames_ptr
+= bytes_read
;
949 version
= read_1_byte (abfd
, pubnames_ptr
);
951 info_offset
= read_4_bytes (abfd
, pubnames_ptr
);
953 info_size
= read_4_bytes (abfd
, pubnames_ptr
);
957 aranges_buffer
= dwarf2_read_section (objfile
,
958 dwarf_aranges_offset
,
964 /* Read in the comp unit header information from the debug_info at
968 read_comp_unit_head (struct comp_unit_head
*cu_header
,
969 char *info_ptr
, bfd
*abfd
)
973 cu_header
->length
= read_initial_length (abfd
, info_ptr
, cu_header
,
975 info_ptr
+= bytes_read
;
976 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
978 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
980 info_ptr
+= bytes_read
;
981 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
983 signed_addr
= bfd_get_sign_extend_vma (abfd
);
985 internal_error (__FILE__
, __LINE__
,
986 "read_comp_unit_head: dwarf from non elf file");
987 cu_header
->signed_addr_p
= signed_addr
;
991 /* Build the partial symbol table by doing a quick pass through the
992 .debug_info and .debug_abbrev sections. */
995 dwarf2_build_psymtabs_hard (struct objfile
*objfile
, int mainline
)
997 /* Instead of reading this into a big buffer, we should probably use
998 mmap() on architectures that support it. (FIXME) */
999 bfd
*abfd
= objfile
->obfd
;
1000 char *info_ptr
, *abbrev_ptr
;
1001 char *beg_of_comp_unit
;
1002 struct partial_die_info comp_unit_die
;
1003 struct partial_symtab
*pst
;
1004 struct cleanup
*back_to
;
1005 CORE_ADDR lowpc
, highpc
;
1007 info_ptr
= dwarf_info_buffer
;
1008 abbrev_ptr
= dwarf_abbrev_buffer
;
1010 /* We use dwarf2_tmp_obstack for objects that don't need to survive
1011 the partial symbol scan, like attribute values.
1013 We could reduce our peak memory consumption during partial symbol
1014 table construction by freeing stuff from this obstack more often
1015 --- say, after processing each compilation unit, or each die ---
1016 but it turns out that this saves almost nothing. For an
1017 executable with 11Mb of Dwarf 2 data, I found about 64k allocated
1018 on dwarf2_tmp_obstack. Some investigation showed:
1020 1) 69% of the attributes used forms DW_FORM_addr, DW_FORM_data*,
1021 DW_FORM_flag, DW_FORM_[su]data, and DW_FORM_ref*. These are
1022 all fixed-length values not requiring dynamic allocation.
1024 2) 30% of the attributes used the form DW_FORM_string. For
1025 DW_FORM_string, read_attribute simply hands back a pointer to
1026 the null-terminated string in dwarf_info_buffer, so no dynamic
1027 allocation is needed there either.
1029 3) The remaining 1% of the attributes all used DW_FORM_block1.
1030 75% of those were DW_AT_frame_base location lists for
1031 functions; the rest were DW_AT_location attributes, probably
1032 for the global variables.
1034 Anyway, what this all means is that the memory the dwarf2
1035 reader uses as temporary space reading partial symbols is about
1036 0.5% as much as we use for dwarf_*_buffer. That's noise. */
1038 obstack_init (&dwarf2_tmp_obstack
);
1039 back_to
= make_cleanup (dwarf2_free_tmp_obstack
, NULL
);
1041 /* Since the objects we're extracting from dwarf_info_buffer vary in
1042 length, only the individual functions to extract them (like
1043 read_comp_unit_head and read_partial_die) can really know whether
1044 the buffer is large enough to hold another complete object.
1046 At the moment, they don't actually check that. If
1047 dwarf_info_buffer holds just one extra byte after the last
1048 compilation unit's dies, then read_comp_unit_head will happily
1049 read off the end of the buffer. read_partial_die is similarly
1050 casual. Those functions should be fixed.
1052 For this loop condition, simply checking whether there's any data
1053 left at all should be sufficient. */
1054 while (info_ptr
< dwarf_info_buffer
+ dwarf_info_size
)
1056 struct comp_unit_head cu_header
;
1057 beg_of_comp_unit
= info_ptr
;
1058 info_ptr
= read_comp_unit_head (&cu_header
, info_ptr
, abfd
);
1060 if (cu_header
.version
!= 2)
1062 error ("Dwarf Error: wrong version in compilation unit header.");
1065 if (cu_header
.abbrev_offset
>= dwarf_abbrev_size
)
1067 error ("Dwarf Error: bad offset (0x%lx) in compilation unit header (offset 0x%lx + 6).",
1068 (long) cu_header
.abbrev_offset
,
1069 (long) (beg_of_comp_unit
- dwarf_info_buffer
));
1072 if (beg_of_comp_unit
+ cu_header
.length
+ cu_header
.initial_length_size
1073 > dwarf_info_buffer
+ dwarf_info_size
)
1075 error ("Dwarf Error: bad length (0x%lx) in compilation unit header (offset 0x%lx + 0).",
1076 (long) cu_header
.length
,
1077 (long) (beg_of_comp_unit
- dwarf_info_buffer
));
1080 /* Read the abbrevs for this compilation unit into a table */
1081 dwarf2_read_abbrevs (abfd
, cu_header
.abbrev_offset
);
1082 make_cleanup (dwarf2_empty_abbrev_table
, NULL
);
1084 /* Read the compilation unit die */
1085 info_ptr
= read_partial_die (&comp_unit_die
, abfd
, info_ptr
,
1088 /* Set the language we're debugging */
1089 set_cu_language (comp_unit_die
.language
);
1091 /* Allocate a new partial symbol table structure */
1092 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1093 comp_unit_die
.name
? comp_unit_die
.name
: "",
1094 comp_unit_die
.lowpc
,
1095 objfile
->global_psymbols
.next
,
1096 objfile
->static_psymbols
.next
);
1098 pst
->read_symtab_private
= (char *)
1099 obstack_alloc (&objfile
->psymbol_obstack
, sizeof (struct dwarf2_pinfo
));
1100 cu_header_offset
= beg_of_comp_unit
- dwarf_info_buffer
;
1101 DWARF_INFO_BUFFER (pst
) = dwarf_info_buffer
;
1102 DWARF_INFO_OFFSET (pst
) = beg_of_comp_unit
- dwarf_info_buffer
;
1103 DWARF_ABBREV_BUFFER (pst
) = dwarf_abbrev_buffer
;
1104 DWARF_ABBREV_SIZE (pst
) = dwarf_abbrev_size
;
1105 DWARF_LINE_BUFFER (pst
) = dwarf_line_buffer
;
1106 DWARF_STR_BUFFER (pst
) = dwarf_str_buffer
;
1107 DWARF_STR_SIZE (pst
) = dwarf_str_size
;
1108 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1110 /* Store the function that reads in the rest of the symbol table */
1111 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1113 /* Check if comp unit has_children.
1114 If so, read the rest of the partial symbols from this comp unit.
1115 If not, there's no more debug_info for this comp unit. */
1116 if (comp_unit_die
.has_children
)
1118 info_ptr
= scan_partial_symbols (info_ptr
, objfile
, &lowpc
, &highpc
,
1121 /* If the compilation unit didn't have an explicit address range,
1122 then use the information extracted from its child dies. */
1123 if (! comp_unit_die
.has_pc_info
)
1125 comp_unit_die
.lowpc
= lowpc
;
1126 comp_unit_die
.highpc
= highpc
;
1129 pst
->textlow
= comp_unit_die
.lowpc
+ baseaddr
;
1130 pst
->texthigh
= comp_unit_die
.highpc
+ baseaddr
;
1132 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
1133 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1134 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
1135 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1136 sort_pst_symbols (pst
);
1138 /* If there is already a psymtab or symtab for a file of this
1139 name, remove it. (If there is a symtab, more drastic things
1140 also happen.) This happens in VxWorks. */
1141 free_named_symtabs (pst
->filename
);
1143 info_ptr
= beg_of_comp_unit
+ cu_header
.length
1144 + cu_header
.initial_length_size
;
1146 do_cleanups (back_to
);
1149 /* Read in all interesting dies to the end of the compilation unit. */
1152 scan_partial_symbols (char *info_ptr
, struct objfile
*objfile
,
1153 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1154 const struct comp_unit_head
*cu_header
)
1156 bfd
*abfd
= objfile
->obfd
;
1157 struct partial_die_info pdi
;
1159 /* This function is called after we've read in the comp_unit_die in
1160 order to read its children. We start the nesting level at 1 since
1161 we have pushed 1 level down in order to read the comp unit's children.
1162 The comp unit itself is at level 0, so we stop reading when we pop
1163 back to that level. */
1165 int nesting_level
= 1;
1167 *lowpc
= ((CORE_ADDR
) -1);
1168 *highpc
= ((CORE_ADDR
) 0);
1170 while (nesting_level
)
1172 info_ptr
= read_partial_die (&pdi
, abfd
, info_ptr
, cu_header
);
1178 case DW_TAG_subprogram
:
1179 if (pdi
.has_pc_info
)
1181 if (pdi
.lowpc
< *lowpc
)
1185 if (pdi
.highpc
> *highpc
)
1187 *highpc
= pdi
.highpc
;
1189 if ((pdi
.is_external
|| nesting_level
== 1)
1190 && !pdi
.is_declaration
)
1192 add_partial_symbol (&pdi
, objfile
, cu_header
);
1196 case DW_TAG_variable
:
1197 case DW_TAG_typedef
:
1198 case DW_TAG_class_type
:
1199 case DW_TAG_structure_type
:
1200 case DW_TAG_union_type
:
1201 case DW_TAG_enumeration_type
:
1202 if ((pdi
.is_external
|| nesting_level
== 1)
1203 && !pdi
.is_declaration
)
1205 add_partial_symbol (&pdi
, objfile
, cu_header
);
1208 case DW_TAG_enumerator
:
1209 /* File scope enumerators are added to the partial symbol
1211 if (nesting_level
== 2)
1212 add_partial_symbol (&pdi
, objfile
, cu_header
);
1214 case DW_TAG_base_type
:
1215 /* File scope base type definitions are added to the partial
1217 if (nesting_level
== 1)
1218 add_partial_symbol (&pdi
, objfile
, cu_header
);
1225 /* If the die has a sibling, skip to the sibling.
1226 Do not skip enumeration types, we want to record their
1228 if (pdi
.sibling
&& pdi
.tag
!= DW_TAG_enumeration_type
)
1230 info_ptr
= pdi
.sibling
;
1232 else if (pdi
.has_children
)
1234 /* Die has children, but the optional DW_AT_sibling attribute
1245 /* If we didn't find a lowpc, set it to highpc to avoid complaints
1246 from `maint check'. */
1247 if (*lowpc
== ((CORE_ADDR
) -1))
1253 add_partial_symbol (struct partial_die_info
*pdi
, struct objfile
*objfile
,
1254 const struct comp_unit_head
*cu_header
)
1260 case DW_TAG_subprogram
:
1261 if (pdi
->is_external
)
1263 /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
1264 mst_text, objfile); */
1265 add_psymbol_to_list (pdi
->name
, strlen (pdi
->name
),
1266 VAR_NAMESPACE
, LOC_BLOCK
,
1267 &objfile
->global_psymbols
,
1268 0, pdi
->lowpc
+ baseaddr
, cu_language
, objfile
);
1272 /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
1273 mst_file_text, objfile); */
1274 add_psymbol_to_list (pdi
->name
, strlen (pdi
->name
),
1275 VAR_NAMESPACE
, LOC_BLOCK
,
1276 &objfile
->static_psymbols
,
1277 0, pdi
->lowpc
+ baseaddr
, cu_language
, objfile
);
1280 case DW_TAG_variable
:
1281 if (pdi
->is_external
)
1284 Don't enter into the minimal symbol tables as there is
1285 a minimal symbol table entry from the ELF symbols already.
1286 Enter into partial symbol table if it has a location
1287 descriptor or a type.
1288 If the location descriptor is missing, new_symbol will create
1289 a LOC_UNRESOLVED symbol, the address of the variable will then
1290 be determined from the minimal symbol table whenever the variable
1292 The address for the partial symbol table entry is not
1293 used by GDB, but it comes in handy for debugging partial symbol
1297 addr
= decode_locdesc (pdi
->locdesc
, objfile
, cu_header
);
1298 if (pdi
->locdesc
|| pdi
->has_type
)
1299 add_psymbol_to_list (pdi
->name
, strlen (pdi
->name
),
1300 VAR_NAMESPACE
, LOC_STATIC
,
1301 &objfile
->global_psymbols
,
1302 0, addr
+ baseaddr
, cu_language
, objfile
);
1306 /* Static Variable. Skip symbols without location descriptors. */
1307 if (pdi
->locdesc
== NULL
)
1309 addr
= decode_locdesc (pdi
->locdesc
, objfile
, cu_header
);
1310 /*prim_record_minimal_symbol (pdi->name, addr + baseaddr,
1311 mst_file_data, objfile); */
1312 add_psymbol_to_list (pdi
->name
, strlen (pdi
->name
),
1313 VAR_NAMESPACE
, LOC_STATIC
,
1314 &objfile
->static_psymbols
,
1315 0, addr
+ baseaddr
, cu_language
, objfile
);
1318 case DW_TAG_typedef
:
1319 case DW_TAG_base_type
:
1320 add_psymbol_to_list (pdi
->name
, strlen (pdi
->name
),
1321 VAR_NAMESPACE
, LOC_TYPEDEF
,
1322 &objfile
->static_psymbols
,
1323 0, (CORE_ADDR
) 0, cu_language
, objfile
);
1325 case DW_TAG_class_type
:
1326 case DW_TAG_structure_type
:
1327 case DW_TAG_union_type
:
1328 case DW_TAG_enumeration_type
:
1329 /* Skip aggregate types without children, these are external
1331 if (pdi
->has_children
== 0)
1333 add_psymbol_to_list (pdi
->name
, strlen (pdi
->name
),
1334 STRUCT_NAMESPACE
, LOC_TYPEDEF
,
1335 &objfile
->static_psymbols
,
1336 0, (CORE_ADDR
) 0, cu_language
, objfile
);
1338 if (cu_language
== language_cplus
)
1340 /* For C++, these implicitly act as typedefs as well. */
1341 add_psymbol_to_list (pdi
->name
, strlen (pdi
->name
),
1342 VAR_NAMESPACE
, LOC_TYPEDEF
,
1343 &objfile
->static_psymbols
,
1344 0, (CORE_ADDR
) 0, cu_language
, objfile
);
1347 case DW_TAG_enumerator
:
1348 add_psymbol_to_list (pdi
->name
, strlen (pdi
->name
),
1349 VAR_NAMESPACE
, LOC_CONST
,
1350 &objfile
->static_psymbols
,
1351 0, (CORE_ADDR
) 0, cu_language
, objfile
);
1358 /* Expand this partial symbol table into a full symbol table. */
1361 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
1363 /* FIXME: This is barely more than a stub. */
1368 warning ("bug: psymtab for %s is already read in.", pst
->filename
);
1374 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
1375 gdb_flush (gdb_stdout
);
1378 psymtab_to_symtab_1 (pst
);
1380 /* Finish up the debug error message. */
1382 printf_filtered ("done.\n");
1388 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
1390 struct objfile
*objfile
= pst
->objfile
;
1391 bfd
*abfd
= objfile
->obfd
;
1392 struct comp_unit_head cu_header
;
1393 struct die_info
*dies
;
1394 unsigned long offset
;
1395 CORE_ADDR lowpc
, highpc
;
1396 struct die_info
*child_die
;
1398 struct symtab
*symtab
;
1399 struct cleanup
*back_to
;
1401 /* Set local variables from the partial symbol table info. */
1402 offset
= DWARF_INFO_OFFSET (pst
);
1403 dwarf_info_buffer
= DWARF_INFO_BUFFER (pst
);
1404 dwarf_abbrev_buffer
= DWARF_ABBREV_BUFFER (pst
);
1405 dwarf_abbrev_size
= DWARF_ABBREV_SIZE (pst
);
1406 dwarf_line_buffer
= DWARF_LINE_BUFFER (pst
);
1407 dwarf_str_buffer
= DWARF_STR_BUFFER (pst
);
1408 dwarf_str_size
= DWARF_STR_SIZE (pst
);
1409 baseaddr
= ANOFFSET (pst
->section_offsets
, SECT_OFF_TEXT (objfile
));
1410 cu_header_offset
= offset
;
1411 info_ptr
= dwarf_info_buffer
+ offset
;
1413 obstack_init (&dwarf2_tmp_obstack
);
1414 back_to
= make_cleanup (dwarf2_free_tmp_obstack
, NULL
);
1417 make_cleanup (really_free_pendings
, NULL
);
1419 /* read in the comp_unit header */
1420 info_ptr
= read_comp_unit_head (&cu_header
, info_ptr
, abfd
);
1422 /* Read the abbrevs for this compilation unit */
1423 dwarf2_read_abbrevs (abfd
, cu_header
.abbrev_offset
);
1424 make_cleanup (dwarf2_empty_abbrev_table
, NULL
);
1426 dies
= read_comp_unit (info_ptr
, abfd
, &cu_header
);
1428 make_cleanup_free_die_list (dies
);
1430 /* Do line number decoding in read_file_scope () */
1431 process_die (dies
, objfile
, &cu_header
);
1433 if (!dwarf2_get_pc_bounds (dies
, &lowpc
, &highpc
, objfile
))
1435 /* Some compilers don't define a DW_AT_high_pc attribute for
1436 the compilation unit. If the DW_AT_high_pc is missing,
1437 synthesize it, by scanning the DIE's below the compilation unit. */
1439 if (dies
->has_children
)
1441 child_die
= dies
->next
;
1442 while (child_die
&& child_die
->tag
)
1444 if (child_die
->tag
== DW_TAG_subprogram
)
1446 CORE_ADDR low
, high
;
1448 if (dwarf2_get_pc_bounds (child_die
, &low
, &high
, objfile
))
1450 highpc
= max (highpc
, high
);
1453 child_die
= sibling_die (child_die
);
1457 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
1459 /* Set symtab language to language from DW_AT_language.
1460 If the compilation is from a C file generated by language preprocessors,
1461 do not set the language if it was already deduced by start_subfile. */
1463 && !(cu_language
== language_c
&& symtab
->language
!= language_c
))
1465 symtab
->language
= cu_language
;
1467 pst
->symtab
= symtab
;
1469 sort_symtab_syms (pst
->symtab
);
1471 do_cleanups (back_to
);
1474 /* Process a die and its children. */
1477 process_die (struct die_info
*die
, struct objfile
*objfile
,
1478 const struct comp_unit_head
*cu_header
)
1482 case DW_TAG_padding
:
1484 case DW_TAG_compile_unit
:
1485 read_file_scope (die
, objfile
, cu_header
);
1487 case DW_TAG_subprogram
:
1488 read_subroutine_type (die
, objfile
, cu_header
);
1489 read_func_scope (die
, objfile
, cu_header
);
1491 case DW_TAG_inlined_subroutine
:
1492 /* FIXME: These are ignored for now.
1493 They could be used to set breakpoints on all inlined instances
1494 of a function and make GDB `next' properly over inlined functions. */
1496 case DW_TAG_lexical_block
:
1497 read_lexical_block_scope (die
, objfile
, cu_header
);
1499 case DW_TAG_class_type
:
1500 case DW_TAG_structure_type
:
1501 case DW_TAG_union_type
:
1502 read_structure_scope (die
, objfile
, cu_header
);
1504 case DW_TAG_enumeration_type
:
1505 read_enumeration (die
, objfile
, cu_header
);
1507 case DW_TAG_subroutine_type
:
1508 read_subroutine_type (die
, objfile
, cu_header
);
1510 case DW_TAG_array_type
:
1511 read_array_type (die
, objfile
, cu_header
);
1513 case DW_TAG_pointer_type
:
1514 read_tag_pointer_type (die
, objfile
, cu_header
);
1516 case DW_TAG_ptr_to_member_type
:
1517 read_tag_ptr_to_member_type (die
, objfile
, cu_header
);
1519 case DW_TAG_reference_type
:
1520 read_tag_reference_type (die
, objfile
, cu_header
);
1522 case DW_TAG_string_type
:
1523 read_tag_string_type (die
, objfile
);
1525 case DW_TAG_base_type
:
1526 read_base_type (die
, objfile
);
1527 if (dwarf_attr (die
, DW_AT_name
))
1529 /* Add a typedef symbol for the base type definition. */
1530 new_symbol (die
, die
->type
, objfile
, cu_header
);
1533 case DW_TAG_common_block
:
1534 read_common_block (die
, objfile
, cu_header
);
1536 case DW_TAG_common_inclusion
:
1539 new_symbol (die
, NULL
, objfile
, cu_header
);
1545 read_file_scope (struct die_info
*die
, struct objfile
*objfile
,
1546 const struct comp_unit_head
*cu_header
)
1548 unsigned int line_offset
= 0;
1549 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
1550 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
1551 struct attribute
*attr
;
1552 char *name
= "<unknown>";
1553 char *comp_dir
= NULL
;
1554 struct die_info
*child_die
;
1555 bfd
*abfd
= objfile
->obfd
;
1557 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, objfile
))
1559 if (die
->has_children
)
1561 child_die
= die
->next
;
1562 while (child_die
&& child_die
->tag
)
1564 if (child_die
->tag
== DW_TAG_subprogram
)
1566 CORE_ADDR low
, high
;
1568 if (dwarf2_get_pc_bounds (child_die
, &low
, &high
, objfile
))
1570 lowpc
= min (lowpc
, low
);
1571 highpc
= max (highpc
, high
);
1574 child_die
= sibling_die (child_die
);
1579 /* If we didn't find a lowpc, set it to highpc to avoid complaints
1580 from finish_block. */
1581 if (lowpc
== ((CORE_ADDR
) -1))
1586 attr
= dwarf_attr (die
, DW_AT_name
);
1589 name
= DW_STRING (attr
);
1591 attr
= dwarf_attr (die
, DW_AT_comp_dir
);
1594 comp_dir
= DW_STRING (attr
);
1597 /* Irix 6.2 native cc prepends <machine>.: to the compilation
1598 directory, get rid of it. */
1599 char *cp
= strchr (comp_dir
, ':');
1601 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
1606 if (objfile
->ei
.entry_point
>= lowpc
&&
1607 objfile
->ei
.entry_point
< highpc
)
1609 objfile
->ei
.entry_file_lowpc
= lowpc
;
1610 objfile
->ei
.entry_file_highpc
= highpc
;
1613 attr
= dwarf_attr (die
, DW_AT_language
);
1616 set_cu_language (DW_UNSND (attr
));
1619 /* We assume that we're processing GCC output. */
1620 processing_gcc_compilation
= 2;
1622 /* FIXME:Do something here. */
1623 if (dip
->at_producer
!= NULL
)
1625 handle_producer (dip
->at_producer
);
1629 /* The compilation unit may be in a different language or objfile,
1630 zero out all remembered fundamental types. */
1631 memset (ftypes
, 0, FT_NUM_MEMBERS
* sizeof (struct type
*));
1633 start_symtab (name
, comp_dir
, lowpc
);
1634 record_debugformat ("DWARF 2");
1636 /* Decode line number information if present. */
1637 attr
= dwarf_attr (die
, DW_AT_stmt_list
);
1640 line_offset
= DW_UNSND (attr
);
1641 dwarf_decode_lines (line_offset
, comp_dir
, abfd
, cu_header
);
1644 /* Process all dies in compilation unit. */
1645 if (die
->has_children
)
1647 child_die
= die
->next
;
1648 while (child_die
&& child_die
->tag
)
1650 process_die (child_die
, objfile
, cu_header
);
1651 child_die
= sibling_die (child_die
);
1657 read_func_scope (struct die_info
*die
, struct objfile
*objfile
,
1658 const struct comp_unit_head
*cu_header
)
1660 register struct context_stack
*new;
1663 struct die_info
*child_die
;
1664 struct attribute
*attr
;
1667 name
= dwarf2_linkage_name (die
);
1669 /* Ignore functions with missing or empty names and functions with
1670 missing or invalid low and high pc attributes. */
1671 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, objfile
))
1677 if (objfile
->ei
.entry_point
>= lowpc
&&
1678 objfile
->ei
.entry_point
< highpc
)
1680 objfile
->ei
.entry_func_lowpc
= lowpc
;
1681 objfile
->ei
.entry_func_highpc
= highpc
;
1684 /* Decode DW_AT_frame_base location descriptor if present, keep result
1685 for DW_OP_fbreg operands in decode_locdesc. */
1686 frame_base_reg
= -1;
1687 frame_base_offset
= 0;
1688 attr
= dwarf_attr (die
, DW_AT_frame_base
);
1691 CORE_ADDR addr
= decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
);
1693 complain (&dwarf2_unsupported_at_frame_base
, name
);
1695 frame_base_reg
= addr
;
1698 frame_base_reg
= basereg
;
1699 frame_base_offset
= addr
;
1702 complain (&dwarf2_unsupported_at_frame_base
, name
);
1705 new = push_context (0, lowpc
);
1706 new->name
= new_symbol (die
, die
->type
, objfile
, cu_header
);
1707 list_in_scope
= &local_symbols
;
1709 if (die
->has_children
)
1711 child_die
= die
->next
;
1712 while (child_die
&& child_die
->tag
)
1714 process_die (child_die
, objfile
, cu_header
);
1715 child_die
= sibling_die (child_die
);
1719 new = pop_context ();
1720 /* Make a block for the local symbols within. */
1721 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1722 lowpc
, highpc
, objfile
);
1723 list_in_scope
= &file_symbols
;
1726 /* Process all the DIES contained within a lexical block scope. Start
1727 a new scope, process the dies, and then close the scope. */
1730 read_lexical_block_scope (struct die_info
*die
, struct objfile
*objfile
,
1731 const struct comp_unit_head
*cu_header
)
1733 register struct context_stack
*new;
1734 CORE_ADDR lowpc
, highpc
;
1735 struct die_info
*child_die
;
1737 /* Ignore blocks with missing or invalid low and high pc attributes. */
1738 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, objfile
))
1743 push_context (0, lowpc
);
1744 if (die
->has_children
)
1746 child_die
= die
->next
;
1747 while (child_die
&& child_die
->tag
)
1749 process_die (child_die
, objfile
, cu_header
);
1750 child_die
= sibling_die (child_die
);
1753 new = pop_context ();
1755 if (local_symbols
!= NULL
)
1757 finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
1760 local_symbols
= new->locals
;
1763 /* Get low and high pc attributes from a die.
1764 Return 1 if the attributes are present and valid, otherwise, return 0. */
1767 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1768 struct objfile
*objfile
)
1770 struct attribute
*attr
;
1774 attr
= dwarf_attr (die
, DW_AT_low_pc
);
1776 low
= DW_ADDR (attr
);
1779 attr
= dwarf_attr (die
, DW_AT_high_pc
);
1781 high
= DW_ADDR (attr
);
1788 /* When using the GNU linker, .gnu.linkonce. sections are used to
1789 eliminate duplicate copies of functions and vtables and such.
1790 The linker will arbitrarily choose one and discard the others.
1791 The AT_*_pc values for such functions refer to local labels in
1792 these sections. If the section from that file was discarded, the
1793 labels are not in the output, so the relocs get a value of 0.
1794 If this is a discarded function, mark the pc bounds as invalid,
1795 so that GDB will ignore it. */
1796 if (low
== 0 && (bfd_get_file_flags (objfile
->obfd
) & HAS_RELOC
) == 0)
1804 /* Add an aggregate field to the field list. */
1807 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
1808 struct objfile
*objfile
,
1809 const struct comp_unit_head
*cu_header
)
1811 struct nextfield
*new_field
;
1812 struct attribute
*attr
;
1814 char *fieldname
= "";
1816 /* Allocate a new field list entry and link it in. */
1817 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
1818 make_cleanup (xfree
, new_field
);
1819 memset (new_field
, 0, sizeof (struct nextfield
));
1820 new_field
->next
= fip
->fields
;
1821 fip
->fields
= new_field
;
1824 /* Handle accessibility and virtuality of field.
1825 The default accessibility for members is public, the default
1826 accessibility for inheritance is private. */
1827 if (die
->tag
!= DW_TAG_inheritance
)
1828 new_field
->accessibility
= DW_ACCESS_public
;
1830 new_field
->accessibility
= DW_ACCESS_private
;
1831 new_field
->virtuality
= DW_VIRTUALITY_none
;
1833 attr
= dwarf_attr (die
, DW_AT_accessibility
);
1835 new_field
->accessibility
= DW_UNSND (attr
);
1836 if (new_field
->accessibility
!= DW_ACCESS_public
)
1837 fip
->non_public_fields
= 1;
1838 attr
= dwarf_attr (die
, DW_AT_virtuality
);
1840 new_field
->virtuality
= DW_UNSND (attr
);
1842 fp
= &new_field
->field
;
1843 if (die
->tag
== DW_TAG_member
)
1845 /* Get type of field. */
1846 fp
->type
= die_type (die
, objfile
, cu_header
);
1848 /* Get bit size of field (zero if none). */
1849 attr
= dwarf_attr (die
, DW_AT_bit_size
);
1852 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
1856 FIELD_BITSIZE (*fp
) = 0;
1859 /* Get bit offset of field. */
1860 attr
= dwarf_attr (die
, DW_AT_data_member_location
);
1863 FIELD_BITPOS (*fp
) =
1864 decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
) * bits_per_byte
;
1867 FIELD_BITPOS (*fp
) = 0;
1868 attr
= dwarf_attr (die
, DW_AT_bit_offset
);
1871 if (BITS_BIG_ENDIAN
)
1873 /* For big endian bits, the DW_AT_bit_offset gives the
1874 additional bit offset from the MSB of the containing
1875 anonymous object to the MSB of the field. We don't
1876 have to do anything special since we don't need to
1877 know the size of the anonymous object. */
1878 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
1882 /* For little endian bits, compute the bit offset to the
1883 MSB of the anonymous object, subtract off the number of
1884 bits from the MSB of the field to the MSB of the
1885 object, and then subtract off the number of bits of
1886 the field itself. The result is the bit offset of
1887 the LSB of the field. */
1889 int bit_offset
= DW_UNSND (attr
);
1891 attr
= dwarf_attr (die
, DW_AT_byte_size
);
1894 /* The size of the anonymous object containing
1895 the bit field is explicit, so use the
1896 indicated size (in bytes). */
1897 anonymous_size
= DW_UNSND (attr
);
1901 /* The size of the anonymous object containing
1902 the bit field must be inferred from the type
1903 attribute of the data member containing the
1905 anonymous_size
= TYPE_LENGTH (fp
->type
);
1907 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
1908 - bit_offset
- FIELD_BITSIZE (*fp
);
1912 /* Get name of field. */
1913 attr
= dwarf_attr (die
, DW_AT_name
);
1914 if (attr
&& DW_STRING (attr
))
1915 fieldname
= DW_STRING (attr
);
1916 fp
->name
= obsavestring (fieldname
, strlen (fieldname
),
1917 &objfile
->type_obstack
);
1919 /* Change accessibility for artificial fields (e.g. virtual table
1920 pointer or virtual base class pointer) to private. */
1921 if (dwarf_attr (die
, DW_AT_artificial
))
1923 new_field
->accessibility
= DW_ACCESS_private
;
1924 fip
->non_public_fields
= 1;
1927 else if (die
->tag
== DW_TAG_variable
)
1931 /* C++ static member.
1932 Get name of field. */
1933 attr
= dwarf_attr (die
, DW_AT_name
);
1934 if (attr
&& DW_STRING (attr
))
1935 fieldname
= DW_STRING (attr
);
1939 /* Get physical name. */
1940 physname
= dwarf2_linkage_name (die
);
1942 SET_FIELD_PHYSNAME (*fp
, obsavestring (physname
, strlen (physname
),
1943 &objfile
->type_obstack
));
1944 FIELD_TYPE (*fp
) = die_type (die
, objfile
, cu_header
);
1945 FIELD_NAME (*fp
) = obsavestring (fieldname
, strlen (fieldname
),
1946 &objfile
->type_obstack
);
1948 else if (die
->tag
== DW_TAG_inheritance
)
1950 /* C++ base class field. */
1951 attr
= dwarf_attr (die
, DW_AT_data_member_location
);
1953 FIELD_BITPOS (*fp
) = (decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
)
1955 FIELD_BITSIZE (*fp
) = 0;
1956 FIELD_TYPE (*fp
) = die_type (die
, objfile
, cu_header
);
1957 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
1958 fip
->nbaseclasses
++;
1962 /* Create the vector of fields, and attach it to the type. */
1965 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
1966 struct objfile
*objfile
)
1968 int nfields
= fip
->nfields
;
1970 /* Record the field count, allocate space for the array of fields,
1971 and create blank accessibility bitfields if necessary. */
1972 TYPE_NFIELDS (type
) = nfields
;
1973 TYPE_FIELDS (type
) = (struct field
*)
1974 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
1975 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
1977 if (fip
->non_public_fields
)
1979 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
1981 TYPE_FIELD_PRIVATE_BITS (type
) =
1982 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
1983 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
1985 TYPE_FIELD_PROTECTED_BITS (type
) =
1986 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
1987 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
1989 TYPE_FIELD_IGNORE_BITS (type
) =
1990 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
1991 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
1994 /* If the type has baseclasses, allocate and clear a bit vector for
1995 TYPE_FIELD_VIRTUAL_BITS. */
1996 if (fip
->nbaseclasses
)
1998 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
2001 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2002 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
2003 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
2004 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
2005 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
2008 /* Copy the saved-up fields into the field vector. Start from the head
2009 of the list, adding to the tail of the field array, so that they end
2010 up in the same order in the array in which they were added to the list. */
2011 while (nfields
-- > 0)
2013 TYPE_FIELD (type
, nfields
) = fip
->fields
->field
;
2014 switch (fip
->fields
->accessibility
)
2016 case DW_ACCESS_private
:
2017 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
2020 case DW_ACCESS_protected
:
2021 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
2024 case DW_ACCESS_public
:
2028 /* Unknown accessibility. Complain and treat it as public. */
2030 complain (&dwarf2_unsupported_accessibility
,
2031 fip
->fields
->accessibility
);
2035 if (nfields
< fip
->nbaseclasses
)
2037 switch (fip
->fields
->virtuality
)
2039 case DW_VIRTUALITY_virtual
:
2040 case DW_VIRTUALITY_pure_virtual
:
2041 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
2045 fip
->fields
= fip
->fields
->next
;
2049 /* Add a member function to the proper fieldlist. */
2052 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
2053 struct type
*type
, struct objfile
*objfile
,
2054 const struct comp_unit_head
*cu_header
)
2056 struct attribute
*attr
;
2057 struct fnfieldlist
*flp
;
2059 struct fn_field
*fnp
;
2062 struct nextfnfield
*new_fnfield
;
2064 /* Get name of member function. */
2065 attr
= dwarf_attr (die
, DW_AT_name
);
2066 if (attr
&& DW_STRING (attr
))
2067 fieldname
= DW_STRING (attr
);
2071 /* Get the mangled name. */
2072 physname
= dwarf2_linkage_name (die
);
2074 /* Look up member function name in fieldlist. */
2075 for (i
= 0; i
< fip
->nfnfields
; i
++)
2077 if (STREQ (fip
->fnfieldlists
[i
].name
, fieldname
))
2081 /* Create new list element if necessary. */
2082 if (i
< fip
->nfnfields
)
2083 flp
= &fip
->fnfieldlists
[i
];
2086 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
2088 fip
->fnfieldlists
= (struct fnfieldlist
*)
2089 xrealloc (fip
->fnfieldlists
,
2090 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
2091 * sizeof (struct fnfieldlist
));
2092 if (fip
->nfnfields
== 0)
2093 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
2095 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
2096 flp
->name
= fieldname
;
2102 /* Create a new member function field and chain it to the field list
2104 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
2105 make_cleanup (xfree
, new_fnfield
);
2106 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
2107 new_fnfield
->next
= flp
->head
;
2108 flp
->head
= new_fnfield
;
2111 /* Fill in the member function field info. */
2112 fnp
= &new_fnfield
->fnfield
;
2113 fnp
->physname
= obsavestring (physname
, strlen (physname
),
2114 &objfile
->type_obstack
);
2115 fnp
->type
= alloc_type (objfile
);
2116 if (die
->type
&& TYPE_CODE (die
->type
) == TYPE_CODE_FUNC
)
2118 struct type
*return_type
= TYPE_TARGET_TYPE (die
->type
);
2119 struct type
**arg_types
;
2120 int nparams
= TYPE_NFIELDS (die
->type
);
2123 /* Copy argument types from the subroutine type. */
2124 arg_types
= (struct type
**)
2125 TYPE_ALLOC (fnp
->type
, (nparams
+ 1) * sizeof (struct type
*));
2126 for (iparams
= 0; iparams
< nparams
; iparams
++)
2127 arg_types
[iparams
] = TYPE_FIELD_TYPE (die
->type
, iparams
);
2129 /* Set last entry in argument type vector. */
2130 if (TYPE_VARARGS (die
->type
))
2131 arg_types
[nparams
] = NULL
;
2133 arg_types
[nparams
] = dwarf2_fundamental_type (objfile
, FT_VOID
);
2135 smash_to_method_type (fnp
->type
, type
, return_type
, arg_types
);
2137 /* Handle static member functions.
2138 Dwarf2 has no clean way to discern C++ static and non-static
2139 member functions. G++ helps GDB by marking the first
2140 parameter for non-static member functions (which is the
2141 this pointer) as artificial. We obtain this information
2142 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
2143 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (die
->type
, 0) == 0)
2144 fnp
->voffset
= VOFFSET_STATIC
;
2147 complain (&dwarf2_missing_member_fn_type_complaint
, physname
);
2149 /* Get fcontext from DW_AT_containing_type if present. */
2150 if (dwarf_attr (die
, DW_AT_containing_type
) != NULL
)
2151 fnp
->fcontext
= die_containing_type (die
, objfile
, cu_header
);
2153 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
2154 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
2156 /* Get accessibility. */
2157 attr
= dwarf_attr (die
, DW_AT_accessibility
);
2160 switch (DW_UNSND (attr
))
2162 case DW_ACCESS_private
:
2163 fnp
->is_private
= 1;
2165 case DW_ACCESS_protected
:
2166 fnp
->is_protected
= 1;
2171 /* Get index in virtual function table if it is a virtual member function. */
2172 attr
= dwarf_attr (die
, DW_AT_vtable_elem_location
);
2174 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
) + 2;
2177 /* Create the vector of member function fields, and attach it to the type. */
2180 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
2181 struct objfile
*objfile
)
2183 struct fnfieldlist
*flp
;
2184 int total_length
= 0;
2187 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2188 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2189 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
2191 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
2193 struct nextfnfield
*nfp
= flp
->head
;
2194 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
2197 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
2198 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
2199 fn_flp
->fn_fields
= (struct fn_field
*)
2200 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
2201 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
2202 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
2204 total_length
+= flp
->length
;
2207 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
2208 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
2211 /* Called when we find the DIE that starts a structure or union scope
2212 (definition) to process all dies that define the members of the
2215 NOTE: we need to call struct_type regardless of whether or not the
2216 DIE has an at_name attribute, since it might be an anonymous
2217 structure or union. This gets the type entered into our set of
2220 However, if the structure is incomplete (an opaque struct/union)
2221 then suppress creating a symbol table entry for it since gdb only
2222 wants to find the one with the complete definition. Note that if
2223 it is complete, we just call new_symbol, which does it's own
2224 checking about whether the struct/union is anonymous or not (and
2225 suppresses creating a symbol table entry itself). */
2228 read_structure_scope (struct die_info
*die
, struct objfile
*objfile
,
2229 const struct comp_unit_head
*cu_header
)
2232 struct attribute
*attr
;
2234 type
= alloc_type (objfile
);
2236 INIT_CPLUS_SPECIFIC (type
);
2237 attr
= dwarf_attr (die
, DW_AT_name
);
2238 if (attr
&& DW_STRING (attr
))
2240 TYPE_TAG_NAME (type
) = obsavestring (DW_STRING (attr
),
2241 strlen (DW_STRING (attr
)),
2242 &objfile
->type_obstack
);
2245 if (die
->tag
== DW_TAG_structure_type
)
2247 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
2249 else if (die
->tag
== DW_TAG_union_type
)
2251 TYPE_CODE (type
) = TYPE_CODE_UNION
;
2255 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
2257 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
2260 attr
= dwarf_attr (die
, DW_AT_byte_size
);
2263 TYPE_LENGTH (type
) = DW_UNSND (attr
);
2267 TYPE_LENGTH (type
) = 0;
2270 /* We need to add the type field to the die immediately so we don't
2271 infinitely recurse when dealing with pointers to the structure
2272 type within the structure itself. */
2275 if (die
->has_children
&& ! die_is_declaration (die
))
2277 struct field_info fi
;
2278 struct die_info
*child_die
;
2279 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
2281 memset (&fi
, 0, sizeof (struct field_info
));
2283 child_die
= die
->next
;
2285 while (child_die
&& child_die
->tag
)
2287 if (child_die
->tag
== DW_TAG_member
)
2289 dwarf2_add_field (&fi
, child_die
, objfile
, cu_header
);
2291 else if (child_die
->tag
== DW_TAG_variable
)
2293 /* C++ static member. */
2294 dwarf2_add_field (&fi
, child_die
, objfile
, cu_header
);
2296 else if (child_die
->tag
== DW_TAG_subprogram
)
2298 /* C++ member function. */
2299 process_die (child_die
, objfile
, cu_header
);
2300 dwarf2_add_member_fn (&fi
, child_die
, type
, objfile
, cu_header
);
2302 else if (child_die
->tag
== DW_TAG_inheritance
)
2304 /* C++ base class field. */
2305 dwarf2_add_field (&fi
, child_die
, objfile
, cu_header
);
2309 process_die (child_die
, objfile
, cu_header
);
2311 child_die
= sibling_die (child_die
);
2314 /* Attach fields and member functions to the type. */
2316 dwarf2_attach_fields_to_type (&fi
, type
, objfile
);
2319 dwarf2_attach_fn_fields_to_type (&fi
, type
, objfile
);
2321 /* Get the type which refers to the base class (possibly this
2322 class itself) which contains the vtable pointer for the current
2323 class from the DW_AT_containing_type attribute. */
2325 if (dwarf_attr (die
, DW_AT_containing_type
) != NULL
)
2327 struct type
*t
= die_containing_type (die
, objfile
, cu_header
);
2329 TYPE_VPTR_BASETYPE (type
) = t
;
2332 static const char vptr_name
[] =
2333 {'_', 'v', 'p', 't', 'r', '\0'};
2336 /* Our own class provides vtbl ptr. */
2337 for (i
= TYPE_NFIELDS (t
) - 1;
2338 i
>= TYPE_N_BASECLASSES (t
);
2341 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
2343 if (STREQN (fieldname
, vptr_name
, strlen (vptr_name
) - 1)
2344 && is_cplus_marker (fieldname
[strlen (vptr_name
)]))
2346 TYPE_VPTR_FIELDNO (type
) = i
;
2351 /* Complain if virtual function table field not found. */
2352 if (i
< TYPE_N_BASECLASSES (t
))
2353 complain (&dwarf2_vtbl_not_found_complaint
,
2354 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) : "");
2358 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
2363 new_symbol (die
, type
, objfile
, cu_header
);
2365 do_cleanups (back_to
);
2369 /* No children, must be stub. */
2370 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
2373 finish_cv_type (die
->type
);
2376 /* Given a pointer to a die which begins an enumeration, process all
2377 the dies that define the members of the enumeration.
2379 This will be much nicer in draft 6 of the DWARF spec when our
2380 members will be dies instead squished into the DW_AT_element_list
2383 NOTE: We reverse the order of the element list. */
2386 read_enumeration (struct die_info
*die
, struct objfile
*objfile
,
2387 const struct comp_unit_head
*cu_header
)
2389 struct die_info
*child_die
;
2391 struct field
*fields
;
2392 struct attribute
*attr
;
2395 int unsigned_enum
= 1;
2397 type
= alloc_type (objfile
);
2399 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
2400 attr
= dwarf_attr (die
, DW_AT_name
);
2401 if (attr
&& DW_STRING (attr
))
2403 TYPE_TAG_NAME (type
) = obsavestring (DW_STRING (attr
),
2404 strlen (DW_STRING (attr
)),
2405 &objfile
->type_obstack
);
2408 attr
= dwarf_attr (die
, DW_AT_byte_size
);
2411 TYPE_LENGTH (type
) = DW_UNSND (attr
);
2415 TYPE_LENGTH (type
) = 0;
2420 if (die
->has_children
)
2422 child_die
= die
->next
;
2423 while (child_die
&& child_die
->tag
)
2425 if (child_die
->tag
!= DW_TAG_enumerator
)
2427 process_die (child_die
, objfile
, cu_header
);
2431 attr
= dwarf_attr (child_die
, DW_AT_name
);
2434 sym
= new_symbol (child_die
, type
, objfile
, cu_header
);
2435 if (SYMBOL_VALUE (sym
) < 0)
2438 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
2440 fields
= (struct field
*)
2442 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
2443 * sizeof (struct field
));
2446 FIELD_NAME (fields
[num_fields
]) = SYMBOL_NAME (sym
);
2447 FIELD_TYPE (fields
[num_fields
]) = NULL
;
2448 FIELD_BITPOS (fields
[num_fields
]) = SYMBOL_VALUE (sym
);
2449 FIELD_BITSIZE (fields
[num_fields
]) = 0;
2455 child_die
= sibling_die (child_die
);
2460 TYPE_NFIELDS (type
) = num_fields
;
2461 TYPE_FIELDS (type
) = (struct field
*)
2462 TYPE_ALLOC (type
, sizeof (struct field
) * num_fields
);
2463 memcpy (TYPE_FIELDS (type
), fields
,
2464 sizeof (struct field
) * num_fields
);
2468 TYPE_FLAGS (type
) |= TYPE_FLAG_UNSIGNED
;
2471 new_symbol (die
, type
, objfile
, cu_header
);
2474 /* Extract all information from a DW_TAG_array_type DIE and put it in
2475 the DIE's type field. For now, this only handles one dimensional
2479 read_array_type (struct die_info
*die
, struct objfile
*objfile
,
2480 const struct comp_unit_head
*cu_header
)
2482 struct die_info
*child_die
;
2483 struct type
*type
= NULL
;
2484 struct type
*element_type
, *range_type
, *index_type
;
2485 struct type
**range_types
= NULL
;
2486 struct attribute
*attr
;
2488 struct cleanup
*back_to
;
2490 /* Return if we've already decoded this type. */
2496 element_type
= die_type (die
, objfile
, cu_header
);
2498 /* Irix 6.2 native cc creates array types without children for
2499 arrays with unspecified length. */
2500 if (die
->has_children
== 0)
2502 index_type
= dwarf2_fundamental_type (objfile
, FT_INTEGER
);
2503 range_type
= create_range_type (NULL
, index_type
, 0, -1);
2504 die
->type
= create_array_type (NULL
, element_type
, range_type
);
2508 back_to
= make_cleanup (null_cleanup
, NULL
);
2509 child_die
= die
->next
;
2510 while (child_die
&& child_die
->tag
)
2512 if (child_die
->tag
== DW_TAG_subrange_type
)
2514 unsigned int low
, high
;
2516 /* Default bounds to an array with unspecified length. */
2519 if (cu_language
== language_fortran
)
2521 /* FORTRAN implies a lower bound of 1, if not given. */
2525 index_type
= die_type (child_die
, objfile
, cu_header
);
2526 attr
= dwarf_attr (child_die
, DW_AT_lower_bound
);
2529 if (attr
->form
== DW_FORM_sdata
)
2531 low
= DW_SND (attr
);
2533 else if (attr
->form
== DW_FORM_udata
2534 || attr
->form
== DW_FORM_data1
2535 || attr
->form
== DW_FORM_data2
2536 || attr
->form
== DW_FORM_data4
)
2538 low
= DW_UNSND (attr
);
2542 complain (&dwarf2_non_const_array_bound_ignored
,
2543 dwarf_form_name (attr
->form
));
2545 die
->type
= lookup_pointer_type (element_type
);
2552 attr
= dwarf_attr (child_die
, DW_AT_upper_bound
);
2555 if (attr
->form
== DW_FORM_sdata
)
2557 high
= DW_SND (attr
);
2559 else if (attr
->form
== DW_FORM_udata
2560 || attr
->form
== DW_FORM_data1
2561 || attr
->form
== DW_FORM_data2
2562 || attr
->form
== DW_FORM_data4
)
2564 high
= DW_UNSND (attr
);
2566 else if (attr
->form
== DW_FORM_block1
)
2568 /* GCC encodes arrays with unspecified or dynamic length
2569 with a DW_FORM_block1 attribute.
2570 FIXME: GDB does not yet know how to handle dynamic
2571 arrays properly, treat them as arrays with unspecified
2577 complain (&dwarf2_non_const_array_bound_ignored
,
2578 dwarf_form_name (attr
->form
));
2580 die
->type
= lookup_pointer_type (element_type
);
2588 /* Create a range type and save it for array type creation. */
2589 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
2591 range_types
= (struct type
**)
2592 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
2593 * sizeof (struct type
*));
2595 make_cleanup (free_current_contents
, &range_types
);
2597 range_types
[ndim
++] = create_range_type (NULL
, index_type
, low
, high
);
2599 child_die
= sibling_die (child_die
);
2602 /* Dwarf2 dimensions are output from left to right, create the
2603 necessary array types in backwards order. */
2604 type
= element_type
;
2606 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
2608 do_cleanups (back_to
);
2610 /* Install the type in the die. */
2614 /* First cut: install each common block member as a global variable. */
2617 read_common_block (struct die_info
*die
, struct objfile
*objfile
,
2618 const struct comp_unit_head
*cu_header
)
2620 struct die_info
*child_die
;
2621 struct attribute
*attr
;
2623 CORE_ADDR base
= (CORE_ADDR
) 0;
2625 attr
= dwarf_attr (die
, DW_AT_location
);
2628 base
= decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
);
2630 if (die
->has_children
)
2632 child_die
= die
->next
;
2633 while (child_die
&& child_die
->tag
)
2635 sym
= new_symbol (child_die
, NULL
, objfile
, cu_header
);
2636 attr
= dwarf_attr (child_die
, DW_AT_data_member_location
);
2639 SYMBOL_VALUE_ADDRESS (sym
) =
2640 base
+ decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
);
2641 add_symbol_to_list (sym
, &global_symbols
);
2643 child_die
= sibling_die (child_die
);
2648 /* Extract all information from a DW_TAG_pointer_type DIE and add to
2649 the user defined type vector. */
2652 read_tag_pointer_type (struct die_info
*die
, struct objfile
*objfile
,
2653 const struct comp_unit_head
*cu_header
)
2656 struct attribute
*attr
;
2663 type
= lookup_pointer_type (die_type (die
, objfile
, cu_header
));
2664 attr
= dwarf_attr (die
, DW_AT_byte_size
);
2667 TYPE_LENGTH (type
) = DW_UNSND (attr
);
2671 TYPE_LENGTH (type
) = cu_header
->addr_size
;
2676 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
2677 the user defined type vector. */
2680 read_tag_ptr_to_member_type (struct die_info
*die
, struct objfile
*objfile
,
2681 const struct comp_unit_head
*cu_header
)
2684 struct type
*to_type
;
2685 struct type
*domain
;
2692 type
= alloc_type (objfile
);
2693 to_type
= die_type (die
, objfile
, cu_header
);
2694 domain
= die_containing_type (die
, objfile
, cu_header
);
2695 smash_to_member_type (type
, domain
, to_type
);
2700 /* Extract all information from a DW_TAG_reference_type DIE and add to
2701 the user defined type vector. */
2704 read_tag_reference_type (struct die_info
*die
, struct objfile
*objfile
,
2705 const struct comp_unit_head
*cu_header
)
2708 struct attribute
*attr
;
2715 type
= lookup_reference_type (die_type (die
, objfile
, cu_header
));
2716 attr
= dwarf_attr (die
, DW_AT_byte_size
);
2719 TYPE_LENGTH (type
) = DW_UNSND (attr
);
2723 TYPE_LENGTH (type
) = cu_header
->addr_size
;
2729 read_tag_const_type (struct die_info
*die
, struct objfile
*objfile
,
2730 const struct comp_unit_head
*cu_header
)
2732 struct type
*base_type
;
2739 base_type
= die_type (die
, objfile
, cu_header
);
2740 die
->type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
2744 read_tag_volatile_type (struct die_info
*die
, struct objfile
*objfile
,
2745 const struct comp_unit_head
*cu_header
)
2747 struct type
*base_type
;
2754 base_type
= die_type (die
, objfile
, cu_header
);
2755 die
->type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
2758 /* Extract all information from a DW_TAG_string_type DIE and add to
2759 the user defined type vector. It isn't really a user defined type,
2760 but it behaves like one, with other DIE's using an AT_user_def_type
2761 attribute to reference it. */
2764 read_tag_string_type (struct die_info
*die
, struct objfile
*objfile
)
2766 struct type
*type
, *range_type
, *index_type
, *char_type
;
2767 struct attribute
*attr
;
2768 unsigned int length
;
2775 attr
= dwarf_attr (die
, DW_AT_string_length
);
2778 length
= DW_UNSND (attr
);
2782 /* check for the DW_AT_byte_size attribute */
2783 attr
= dwarf_attr (die
, DW_AT_byte_size
);
2786 length
= DW_UNSND (attr
);
2793 index_type
= dwarf2_fundamental_type (objfile
, FT_INTEGER
);
2794 range_type
= create_range_type (NULL
, index_type
, 1, length
);
2795 if (cu_language
== language_fortran
)
2797 /* Need to create a unique string type for bounds
2799 type
= create_string_type (0, range_type
);
2803 char_type
= dwarf2_fundamental_type (objfile
, FT_CHAR
);
2804 type
= create_string_type (char_type
, range_type
);
2809 /* Handle DIES due to C code like:
2813 int (*funcp)(int a, long l);
2817 ('funcp' generates a DW_TAG_subroutine_type DIE)
2821 read_subroutine_type (struct die_info
*die
, struct objfile
*objfile
,
2822 const struct comp_unit_head
*cu_header
)
2824 struct type
*type
; /* Type that this function returns */
2825 struct type
*ftype
; /* Function that returns above type */
2826 struct attribute
*attr
;
2828 /* Decode the type that this subroutine returns */
2833 type
= die_type (die
, objfile
, cu_header
);
2834 ftype
= lookup_function_type (type
);
2836 /* All functions in C++ have prototypes. */
2837 attr
= dwarf_attr (die
, DW_AT_prototyped
);
2838 if ((attr
&& (DW_UNSND (attr
) != 0))
2839 || cu_language
== language_cplus
)
2840 TYPE_FLAGS (ftype
) |= TYPE_FLAG_PROTOTYPED
;
2842 if (die
->has_children
)
2844 struct die_info
*child_die
;
2848 /* Count the number of parameters.
2849 FIXME: GDB currently ignores vararg functions, but knows about
2850 vararg member functions. */
2851 child_die
= die
->next
;
2852 while (child_die
&& child_die
->tag
)
2854 if (child_die
->tag
== DW_TAG_formal_parameter
)
2856 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
2857 TYPE_FLAGS (ftype
) |= TYPE_FLAG_VARARGS
;
2858 child_die
= sibling_die (child_die
);
2861 /* Allocate storage for parameters and fill them in. */
2862 TYPE_NFIELDS (ftype
) = nparams
;
2863 TYPE_FIELDS (ftype
) = (struct field
*)
2864 TYPE_ALLOC (ftype
, nparams
* sizeof (struct field
));
2866 child_die
= die
->next
;
2867 while (child_die
&& child_die
->tag
)
2869 if (child_die
->tag
== DW_TAG_formal_parameter
)
2871 /* Dwarf2 has no clean way to discern C++ static and non-static
2872 member functions. G++ helps GDB by marking the first
2873 parameter for non-static member functions (which is the
2874 this pointer) as artificial. We pass this information
2875 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
2876 attr
= dwarf_attr (child_die
, DW_AT_artificial
);
2878 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
2880 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
2881 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, objfile
,
2885 child_die
= sibling_die (child_die
);
2893 read_typedef (struct die_info
*die
, struct objfile
*objfile
,
2894 const struct comp_unit_head
*cu_header
)
2896 struct attribute
*attr
;
2901 attr
= dwarf_attr (die
, DW_AT_name
);
2902 if (attr
&& DW_STRING (attr
))
2904 name
= DW_STRING (attr
);
2906 die
->type
= init_type (TYPE_CODE_TYPEDEF
, 0, TYPE_FLAG_TARGET_STUB
, name
, objfile
);
2907 TYPE_TARGET_TYPE (die
->type
) = die_type (die
, objfile
, cu_header
);
2911 /* Find a representation of a given base type and install
2912 it in the TYPE field of the die. */
2915 read_base_type (struct die_info
*die
, struct objfile
*objfile
)
2918 struct attribute
*attr
;
2919 int encoding
= 0, size
= 0;
2921 /* If we've already decoded this die, this is a no-op. */
2927 attr
= dwarf_attr (die
, DW_AT_encoding
);
2930 encoding
= DW_UNSND (attr
);
2932 attr
= dwarf_attr (die
, DW_AT_byte_size
);
2935 size
= DW_UNSND (attr
);
2937 attr
= dwarf_attr (die
, DW_AT_name
);
2938 if (attr
&& DW_STRING (attr
))
2940 enum type_code code
= TYPE_CODE_INT
;
2945 case DW_ATE_address
:
2946 /* Turn DW_ATE_address into a void * pointer. */
2947 code
= TYPE_CODE_PTR
;
2948 type_flags
|= TYPE_FLAG_UNSIGNED
;
2950 case DW_ATE_boolean
:
2951 code
= TYPE_CODE_BOOL
;
2952 type_flags
|= TYPE_FLAG_UNSIGNED
;
2954 case DW_ATE_complex_float
:
2955 code
= TYPE_CODE_COMPLEX
;
2958 code
= TYPE_CODE_FLT
;
2961 case DW_ATE_signed_char
:
2963 case DW_ATE_unsigned
:
2964 case DW_ATE_unsigned_char
:
2965 type_flags
|= TYPE_FLAG_UNSIGNED
;
2968 complain (&dwarf2_unsupported_at_encoding
,
2969 dwarf_type_encoding_name (encoding
));
2972 type
= init_type (code
, size
, type_flags
, DW_STRING (attr
), objfile
);
2973 if (encoding
== DW_ATE_address
)
2974 TYPE_TARGET_TYPE (type
) = dwarf2_fundamental_type (objfile
, FT_VOID
);
2978 type
= dwarf_base_type (encoding
, size
, objfile
);
2983 /* Read a whole compilation unit into a linked list of dies. */
2985 static struct die_info
*
2986 read_comp_unit (char *info_ptr
, bfd
*abfd
,
2987 const struct comp_unit_head
*cu_header
)
2989 struct die_info
*first_die
, *last_die
, *die
;
2993 /* Reset die reference table; we are
2994 building new ones now. */
2995 dwarf2_empty_hash_tables ();
2999 first_die
= last_die
= NULL
;
3002 cur_ptr
= read_full_die (&die
, abfd
, cur_ptr
, cu_header
);
3003 if (die
->has_children
)
3014 /* Enter die in reference hash table */
3015 store_in_ref_table (die
->offset
, die
);
3019 first_die
= last_die
= die
;
3023 last_die
->next
= die
;
3027 while (nesting_level
> 0);
3031 /* Free a linked list of dies. */
3034 free_die_list (struct die_info
*dies
)
3036 struct die_info
*die
, *next
;
3049 do_free_die_list_cleanup (void *dies
)
3051 free_die_list (dies
);
3054 static struct cleanup
*
3055 make_cleanup_free_die_list (struct die_info
*dies
)
3057 return make_cleanup (do_free_die_list_cleanup
, dies
);
3061 /* Read the contents of the section at OFFSET and of size SIZE from the
3062 object file specified by OBJFILE into the psymbol_obstack and return it. */
3065 dwarf2_read_section (struct objfile
*objfile
, file_ptr offset
,
3068 bfd
*abfd
= objfile
->obfd
;
3074 buf
= (char *) obstack_alloc (&objfile
->psymbol_obstack
, size
);
3075 if ((bfd_seek (abfd
, offset
, SEEK_SET
) != 0) ||
3076 (bfd_bread (buf
, size
, abfd
) != size
))
3079 error ("Dwarf Error: Can't read DWARF data from '%s'",
3080 bfd_get_filename (abfd
));
3085 /* In DWARF version 2, the description of the debugging information is
3086 stored in a separate .debug_abbrev section. Before we read any
3087 dies from a section we read in all abbreviations and install them
3091 dwarf2_read_abbrevs (bfd
*abfd
, unsigned int offset
)
3094 struct abbrev_info
*cur_abbrev
;
3095 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
3096 unsigned int abbrev_form
, hash_number
;
3098 /* empty the table */
3099 dwarf2_empty_abbrev_table (NULL
);
3101 abbrev_ptr
= dwarf_abbrev_buffer
+ offset
;
3102 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3103 abbrev_ptr
+= bytes_read
;
3105 /* loop until we reach an abbrev number of 0 */
3106 while (abbrev_number
)
3108 cur_abbrev
= dwarf_alloc_abbrev ();
3110 /* read in abbrev header */
3111 cur_abbrev
->number
= abbrev_number
;
3112 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3113 abbrev_ptr
+= bytes_read
;
3114 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
3117 /* now read in declarations */
3118 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3119 abbrev_ptr
+= bytes_read
;
3120 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3121 abbrev_ptr
+= bytes_read
;
3124 if ((cur_abbrev
->num_attrs
% ATTR_ALLOC_CHUNK
) == 0)
3126 cur_abbrev
->attrs
= (struct attr_abbrev
*)
3127 xrealloc (cur_abbrev
->attrs
,
3128 (cur_abbrev
->num_attrs
+ ATTR_ALLOC_CHUNK
)
3129 * sizeof (struct attr_abbrev
));
3131 cur_abbrev
->attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
3132 cur_abbrev
->attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
3133 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3134 abbrev_ptr
+= bytes_read
;
3135 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3136 abbrev_ptr
+= bytes_read
;
3139 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
3140 cur_abbrev
->next
= dwarf2_abbrevs
[hash_number
];
3141 dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
3143 /* Get next abbreviation.
3144 Under Irix6 the abbreviations for a compilation unit are not
3145 always properly terminated with an abbrev number of 0.
3146 Exit loop if we encounter an abbreviation which we have
3147 already read (which means we are about to read the abbreviations
3148 for the next compile unit) or if the end of the abbreviation
3149 table is reached. */
3150 if ((unsigned int) (abbrev_ptr
- dwarf_abbrev_buffer
)
3151 >= dwarf_abbrev_size
)
3153 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3154 abbrev_ptr
+= bytes_read
;
3155 if (dwarf2_lookup_abbrev (abbrev_number
) != NULL
)
3160 /* Empty the abbrev table for a new compilation unit. */
3164 dwarf2_empty_abbrev_table (PTR ignore
)
3167 struct abbrev_info
*abbrev
, *next
;
3169 for (i
= 0; i
< ABBREV_HASH_SIZE
; ++i
)
3172 abbrev
= dwarf2_abbrevs
[i
];
3175 next
= abbrev
->next
;
3176 xfree (abbrev
->attrs
);
3180 dwarf2_abbrevs
[i
] = NULL
;
3184 /* Lookup an abbrev_info structure in the abbrev hash table. */
3186 static struct abbrev_info
*
3187 dwarf2_lookup_abbrev (unsigned int number
)
3189 unsigned int hash_number
;
3190 struct abbrev_info
*abbrev
;
3192 hash_number
= number
% ABBREV_HASH_SIZE
;
3193 abbrev
= dwarf2_abbrevs
[hash_number
];
3197 if (abbrev
->number
== number
)
3200 abbrev
= abbrev
->next
;
3205 /* Read a minimal amount of information into the minimal die structure. */
3208 read_partial_die (struct partial_die_info
*part_die
, bfd
*abfd
,
3209 char *info_ptr
, const struct comp_unit_head
*cu_header
)
3211 unsigned int abbrev_number
, bytes_read
, i
;
3212 struct abbrev_info
*abbrev
;
3213 struct attribute attr
;
3214 struct attribute spec_attr
;
3215 int found_spec_attr
= 0;
3216 int has_low_pc_attr
= 0;
3217 int has_high_pc_attr
= 0;
3219 *part_die
= zeroed_partial_die
;
3220 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
3221 info_ptr
+= bytes_read
;
3225 abbrev
= dwarf2_lookup_abbrev (abbrev_number
);
3228 error ("Dwarf Error: Could not find abbrev number %d.", abbrev_number
);
3230 part_die
->offset
= info_ptr
- dwarf_info_buffer
;
3231 part_die
->tag
= abbrev
->tag
;
3232 part_die
->has_children
= abbrev
->has_children
;
3233 part_die
->abbrev
= abbrev_number
;
3235 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
3237 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
,
3238 info_ptr
, cu_header
);
3240 /* Store the data if it is of an attribute we want to keep in a
3241 partial symbol table. */
3246 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
3247 if (part_die
->name
== NULL
)
3248 part_die
->name
= DW_STRING (&attr
);
3250 case DW_AT_MIPS_linkage_name
:
3251 part_die
->name
= DW_STRING (&attr
);
3254 has_low_pc_attr
= 1;
3255 part_die
->lowpc
= DW_ADDR (&attr
);
3258 has_high_pc_attr
= 1;
3259 part_die
->highpc
= DW_ADDR (&attr
);
3261 case DW_AT_location
:
3262 part_die
->locdesc
= DW_BLOCK (&attr
);
3264 case DW_AT_language
:
3265 part_die
->language
= DW_UNSND (&attr
);
3267 case DW_AT_external
:
3268 part_die
->is_external
= DW_UNSND (&attr
);
3270 case DW_AT_declaration
:
3271 part_die
->is_declaration
= DW_UNSND (&attr
);
3274 part_die
->has_type
= 1;
3276 case DW_AT_abstract_origin
:
3277 case DW_AT_specification
:
3278 found_spec_attr
= 1;
3282 /* Ignore absolute siblings, they might point outside of
3283 the current compile unit. */
3284 if (attr
.form
== DW_FORM_ref_addr
)
3285 complain (&dwarf2_absolute_sibling_complaint
);
3288 dwarf_info_buffer
+ dwarf2_get_ref_die_offset (&attr
);
3295 /* If we found a reference attribute and the die has no name, try
3296 to find a name in the referred to die. */
3298 if (found_spec_attr
&& part_die
->name
== NULL
)
3300 struct partial_die_info spec_die
;
3304 spec_ptr
= dwarf_info_buffer
+ dwarf2_get_ref_die_offset (&spec_attr
);
3305 read_partial_die (&spec_die
, abfd
, spec_ptr
, cu_header
);
3308 part_die
->name
= spec_die
.name
;
3310 /* Copy DW_AT_external attribute if it is set. */
3311 if (spec_die
.is_external
)
3312 part_die
->is_external
= spec_die
.is_external
;
3316 /* When using the GNU linker, .gnu.linkonce. sections are used to
3317 eliminate duplicate copies of functions and vtables and such.
3318 The linker will arbitrarily choose one and discard the others.
3319 The AT_*_pc values for such functions refer to local labels in
3320 these sections. If the section from that file was discarded, the
3321 labels are not in the output, so the relocs get a value of 0.
3322 If this is a discarded function, mark the pc bounds as invalid,
3323 so that GDB will ignore it. */
3324 if (has_low_pc_attr
&& has_high_pc_attr
3325 && part_die
->lowpc
< part_die
->highpc
3326 && (part_die
->lowpc
!= 0
3327 || (bfd_get_file_flags (abfd
) & HAS_RELOC
)))
3328 part_die
->has_pc_info
= 1;
3332 /* Read the die from the .debug_info section buffer. And set diep to
3333 point to a newly allocated die with its information. */
3336 read_full_die (struct die_info
**diep
, bfd
*abfd
, char *info_ptr
,
3337 const struct comp_unit_head
*cu_header
)
3339 unsigned int abbrev_number
, bytes_read
, i
, offset
;
3340 struct abbrev_info
*abbrev
;
3341 struct die_info
*die
;
3343 offset
= info_ptr
- dwarf_info_buffer
;
3344 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
3345 info_ptr
+= bytes_read
;
3348 die
= dwarf_alloc_die ();
3350 die
->abbrev
= abbrev_number
;
3356 abbrev
= dwarf2_lookup_abbrev (abbrev_number
);
3359 error ("Dwarf Error: could not find abbrev number %d.", abbrev_number
);
3361 die
= dwarf_alloc_die ();
3362 die
->offset
= offset
;
3363 die
->tag
= abbrev
->tag
;
3364 die
->has_children
= abbrev
->has_children
;
3365 die
->abbrev
= abbrev_number
;
3368 die
->num_attrs
= abbrev
->num_attrs
;
3369 die
->attrs
= (struct attribute
*)
3370 xmalloc (die
->num_attrs
* sizeof (struct attribute
));
3372 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
3374 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
3375 abfd
, info_ptr
, cu_header
);
3382 /* Read an attribute value described by an attribute form. */
3385 read_attribute_value (struct attribute
*attr
, unsigned form
,
3386 bfd
*abfd
, char *info_ptr
,
3387 const struct comp_unit_head
*cu_header
)
3389 unsigned int bytes_read
;
3390 struct dwarf_block
*blk
;
3396 case DW_FORM_ref_addr
:
3397 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu_header
, &bytes_read
);
3398 info_ptr
+= bytes_read
;
3400 case DW_FORM_block2
:
3401 blk
= dwarf_alloc_block ();
3402 blk
->size
= read_2_bytes (abfd
, info_ptr
);
3404 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
3405 info_ptr
+= blk
->size
;
3406 DW_BLOCK (attr
) = blk
;
3408 case DW_FORM_block4
:
3409 blk
= dwarf_alloc_block ();
3410 blk
->size
= read_4_bytes (abfd
, info_ptr
);
3412 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
3413 info_ptr
+= blk
->size
;
3414 DW_BLOCK (attr
) = blk
;
3417 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
3421 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
3425 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
3428 case DW_FORM_string
:
3429 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
3430 info_ptr
+= bytes_read
;
3433 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
3435 info_ptr
+= bytes_read
;
3438 blk
= dwarf_alloc_block ();
3439 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
3440 info_ptr
+= bytes_read
;
3441 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
3442 info_ptr
+= blk
->size
;
3443 DW_BLOCK (attr
) = blk
;
3445 case DW_FORM_block1
:
3446 blk
= dwarf_alloc_block ();
3447 blk
->size
= read_1_byte (abfd
, info_ptr
);
3449 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
3450 info_ptr
+= blk
->size
;
3451 DW_BLOCK (attr
) = blk
;
3454 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
3458 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
3462 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
3463 info_ptr
+= bytes_read
;
3466 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
3467 info_ptr
+= bytes_read
;
3470 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
3474 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
3478 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
3482 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
3485 case DW_FORM_ref_udata
:
3486 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
3487 info_ptr
+= bytes_read
;
3489 case DW_FORM_indirect
:
3490 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
3491 info_ptr
+= bytes_read
;
3492 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu_header
);
3495 error ("Dwarf Error: Cannot handle %s in DWARF reader.",
3496 dwarf_form_name (form
));
3501 /* Read an attribute described by an abbreviated attribute. */
3504 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
3505 bfd
*abfd
, char *info_ptr
,
3506 const struct comp_unit_head
*cu_header
)
3508 attr
->name
= abbrev
->name
;
3509 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu_header
);
3512 /* read dwarf information from a buffer */
3515 read_1_byte (bfd
*abfd
, char *buf
)
3517 return bfd_get_8 (abfd
, (bfd_byte
*) buf
);
3521 read_1_signed_byte (bfd
*abfd
, char *buf
)
3523 return bfd_get_signed_8 (abfd
, (bfd_byte
*) buf
);
3527 read_2_bytes (bfd
*abfd
, char *buf
)
3529 return bfd_get_16 (abfd
, (bfd_byte
*) buf
);
3533 read_2_signed_bytes (bfd
*abfd
, char *buf
)
3535 return bfd_get_signed_16 (abfd
, (bfd_byte
*) buf
);
3539 read_4_bytes (bfd
*abfd
, char *buf
)
3541 return bfd_get_32 (abfd
, (bfd_byte
*) buf
);
3545 read_4_signed_bytes (bfd
*abfd
, char *buf
)
3547 return bfd_get_signed_32 (abfd
, (bfd_byte
*) buf
);
3550 static unsigned long
3551 read_8_bytes (bfd
*abfd
, char *buf
)
3553 return bfd_get_64 (abfd
, (bfd_byte
*) buf
);
3557 read_address (bfd
*abfd
, char *buf
, const struct comp_unit_head
*cu_header
,
3560 CORE_ADDR retval
= 0;
3562 if (cu_header
->signed_addr_p
)
3564 switch (cu_header
->addr_size
)
3567 retval
= bfd_get_signed_16 (abfd
, (bfd_byte
*) buf
);
3570 retval
= bfd_get_signed_32 (abfd
, (bfd_byte
*) buf
);
3573 retval
= bfd_get_signed_64 (abfd
, (bfd_byte
*) buf
);
3576 internal_error (__FILE__
, __LINE__
,
3577 "read_address: bad switch, signed");
3582 switch (cu_header
->addr_size
)
3585 retval
= bfd_get_16 (abfd
, (bfd_byte
*) buf
);
3588 retval
= bfd_get_32 (abfd
, (bfd_byte
*) buf
);
3591 retval
= bfd_get_64 (abfd
, (bfd_byte
*) buf
);
3594 internal_error (__FILE__
, __LINE__
,
3595 "read_address: bad switch, unsigned");
3599 *bytes_read
= cu_header
->addr_size
;
3603 /* Reads the initial length from a section. The (draft) DWARF 2.1
3604 specification allows the initial length to take up either 4 bytes
3605 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
3606 bytes describe the length and all offsets will be 8 bytes in length
3609 The value returned via bytes_read should be used to increment
3610 the relevant pointer after calling read_initial_length().
3612 As a side effect, this function sets the fields initial_length_size
3613 and offset_size in cu_header to the values appropriate for the
3614 length field. (The format of the initial length field determines
3615 the width of file offsets to be fetched later with fetch_offset().)
3617 [ Note: read_initial_length() and read_offset() are based on the
3618 document entitled "DWARF Debugging Information Format", revision
3619 2.1, draft 4, dated July 20, 2000. This document was obtained
3622 http://reality.sgi.com/dehnert_engr/dwarf/dwarf2p1-draft4-000720.pdf
3624 This document is only a draft and is subject to change. (So beware.)
3626 - Kevin, Aug 4, 2000
3630 read_initial_length (bfd
*abfd
, char *buf
, struct comp_unit_head
*cu_header
,
3635 retval
= bfd_get_32 (abfd
, (bfd_byte
*) buf
);
3637 if (retval
== 0xffffffff)
3639 retval
= bfd_get_64 (abfd
, (bfd_byte
*) buf
+ 4);
3641 if (cu_header
!= NULL
)
3643 cu_header
->initial_length_size
= 12;
3644 cu_header
->offset_size
= 8;
3650 if (cu_header
!= NULL
)
3652 cu_header
->initial_length_size
= 4;
3653 cu_header
->offset_size
= 4;
3660 /* Read an offset from the data stream. The size of the offset is
3661 given by cu_header->offset_size. */
3664 read_offset (bfd
*abfd
, char *buf
, const struct comp_unit_head
*cu_header
,
3669 switch (cu_header
->offset_size
)
3672 retval
= bfd_get_32 (abfd
, (bfd_byte
*) buf
);
3676 retval
= bfd_get_64 (abfd
, (bfd_byte
*) buf
);
3680 internal_error (__FILE__
, __LINE__
,
3681 "read_offset: bad switch");
3688 read_n_bytes (bfd
*abfd
, char *buf
, unsigned int size
)
3690 /* If the size of a host char is 8 bits, we can return a pointer
3691 to the buffer, otherwise we have to copy the data to a buffer
3692 allocated on the temporary obstack. */
3693 gdb_assert (HOST_CHAR_BIT
== 8);
3698 read_string (bfd
*abfd
, char *buf
, unsigned int *bytes_read_ptr
)
3700 /* If the size of a host char is 8 bits, we can return a pointer
3701 to the string, otherwise we have to copy the string to a buffer
3702 allocated on the temporary obstack. */
3703 gdb_assert (HOST_CHAR_BIT
== 8);
3706 *bytes_read_ptr
= 1;
3709 *bytes_read_ptr
= strlen (buf
) + 1;
3714 read_indirect_string (bfd
*abfd
, char *buf
,
3715 const struct comp_unit_head
*cu_header
,
3716 unsigned int *bytes_read_ptr
)
3718 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
,
3719 (int *) bytes_read_ptr
);
3721 if (dwarf_str_buffer
== NULL
)
3723 error ("DW_FORM_strp used without .debug_str section");
3726 if (str_offset
>= dwarf_str_size
)
3728 error ("DW_FORM_strp pointing outside of .debug_str section");
3731 gdb_assert (HOST_CHAR_BIT
== 8);
3732 if (dwarf_str_buffer
[str_offset
] == '\0')
3734 return dwarf_str_buffer
+ str_offset
;
3737 static unsigned long
3738 read_unsigned_leb128 (bfd
*abfd
, char *buf
, unsigned int *bytes_read_ptr
)
3740 unsigned long result
;
3741 unsigned int num_read
;
3751 byte
= bfd_get_8 (abfd
, (bfd_byte
*) buf
);
3754 result
|= ((unsigned long)(byte
& 127) << shift
);
3755 if ((byte
& 128) == 0)
3761 *bytes_read_ptr
= num_read
;
3766 read_signed_leb128 (bfd
*abfd
, char *buf
, unsigned int *bytes_read_ptr
)
3769 int i
, shift
, size
, num_read
;
3779 byte
= bfd_get_8 (abfd
, (bfd_byte
*) buf
);
3782 result
|= ((long)(byte
& 127) << shift
);
3784 if ((byte
& 128) == 0)
3789 if ((shift
< size
) && (byte
& 0x40))
3791 result
|= -(1 << shift
);
3793 *bytes_read_ptr
= num_read
;
3798 set_cu_language (unsigned int lang
)
3804 cu_language
= language_c
;
3806 case DW_LANG_C_plus_plus
:
3807 cu_language
= language_cplus
;
3809 case DW_LANG_Fortran77
:
3810 case DW_LANG_Fortran90
:
3811 case DW_LANG_Fortran95
:
3812 cu_language
= language_fortran
;
3814 case DW_LANG_Mips_Assembler
:
3815 cu_language
= language_asm
;
3818 cu_language
= language_java
;
3821 case DW_LANG_Cobol74
:
3822 case DW_LANG_Cobol85
:
3823 case DW_LANG_Pascal83
:
3824 case DW_LANG_Modula2
:
3826 cu_language
= language_unknown
;
3829 cu_language_defn
= language_def (cu_language
);
3832 /* Return the named attribute or NULL if not there. */
3834 static struct attribute
*
3835 dwarf_attr (struct die_info
*die
, unsigned int name
)
3838 struct attribute
*spec
= NULL
;
3840 for (i
= 0; i
< die
->num_attrs
; ++i
)
3842 if (die
->attrs
[i
].name
== name
)
3844 return &die
->attrs
[i
];
3846 if (die
->attrs
[i
].name
== DW_AT_specification
3847 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
3848 spec
= &die
->attrs
[i
];
3852 struct die_info
*ref_die
=
3853 follow_die_ref (dwarf2_get_ref_die_offset (spec
));
3856 return dwarf_attr (ref_die
, name
);
3863 die_is_declaration (struct die_info
*die
)
3865 return (dwarf_attr (die
, DW_AT_declaration
)
3866 && ! dwarf_attr (die
, DW_AT_specification
));
3869 /* Decode the line number information for the compilation unit whose
3870 line number info is at OFFSET in the .debug_line section.
3871 The compilation directory of the file is passed in COMP_DIR. */
3875 unsigned int num_files
;
3888 unsigned int num_dirs
;
3893 dwarf_decode_lines (unsigned int offset
, char *comp_dir
, bfd
*abfd
,
3894 const struct comp_unit_head
*cu_header
)
3898 struct line_head lh
;
3899 struct cleanup
*back_to
;
3900 unsigned int i
, bytes_read
;
3901 char *cur_file
, *cur_dir
;
3902 unsigned char op_code
, extended_op
, adj_opcode
;
3904 #define FILE_ALLOC_CHUNK 5
3905 #define DIR_ALLOC_CHUNK 5
3907 struct filenames files
;
3908 struct directories dirs
;
3910 if (dwarf_line_buffer
== NULL
)
3912 complain (&dwarf2_missing_line_number_section
);
3916 files
.num_files
= 0;
3922 line_ptr
= dwarf_line_buffer
+ offset
;
3924 /* read in the prologue */
3925 lh
.total_length
= read_initial_length (abfd
, line_ptr
, NULL
, &bytes_read
);
3926 line_ptr
+= bytes_read
;
3927 line_end
= line_ptr
+ lh
.total_length
;
3928 lh
.version
= read_2_bytes (abfd
, line_ptr
);
3930 lh
.prologue_length
= read_offset (abfd
, line_ptr
, cu_header
, &bytes_read
);
3931 line_ptr
+= bytes_read
;
3932 lh
.minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
3934 lh
.default_is_stmt
= read_1_byte (abfd
, line_ptr
);
3936 lh
.line_base
= read_1_signed_byte (abfd
, line_ptr
);
3938 lh
.line_range
= read_1_byte (abfd
, line_ptr
);
3940 lh
.opcode_base
= read_1_byte (abfd
, line_ptr
);
3942 lh
.standard_opcode_lengths
= (unsigned char *)
3943 xmalloc (lh
.opcode_base
* sizeof (unsigned char));
3944 back_to
= make_cleanup (free_current_contents
, &lh
.standard_opcode_lengths
);
3946 lh
.standard_opcode_lengths
[0] = 1;
3947 for (i
= 1; i
< lh
.opcode_base
; ++i
)
3949 lh
.standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
3953 /* Read directory table */
3954 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
3956 line_ptr
+= bytes_read
;
3957 if ((dirs
.num_dirs
% DIR_ALLOC_CHUNK
) == 0)
3959 dirs
.dirs
= (char **)
3960 xrealloc (dirs
.dirs
,
3961 (dirs
.num_dirs
+ DIR_ALLOC_CHUNK
) * sizeof (char *));
3962 if (dirs
.num_dirs
== 0)
3963 make_cleanup (free_current_contents
, &dirs
.dirs
);
3965 dirs
.dirs
[dirs
.num_dirs
++] = cur_dir
;
3967 line_ptr
+= bytes_read
;
3969 /* Read file name table */
3970 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
3972 line_ptr
+= bytes_read
;
3973 if ((files
.num_files
% FILE_ALLOC_CHUNK
) == 0)
3975 files
.files
= (struct fileinfo
*)
3976 xrealloc (files
.files
,
3977 (files
.num_files
+ FILE_ALLOC_CHUNK
)
3978 * sizeof (struct fileinfo
));
3979 if (files
.num_files
== 0)
3980 make_cleanup (free_current_contents
, &files
.files
);
3982 files
.files
[files
.num_files
].name
= cur_file
;
3983 files
.files
[files
.num_files
].dir
=
3984 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
3985 line_ptr
+= bytes_read
;
3986 files
.files
[files
.num_files
].time
=
3987 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
3988 line_ptr
+= bytes_read
;
3989 files
.files
[files
.num_files
].size
=
3990 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
3991 line_ptr
+= bytes_read
;
3994 line_ptr
+= bytes_read
;
3996 /* Read the statement sequences until there's nothing left. */
3997 while (line_ptr
< line_end
)
3999 /* state machine registers */
4000 CORE_ADDR address
= 0;
4001 unsigned int file
= 1;
4002 unsigned int line
= 1;
4003 unsigned int column
= 0;
4004 int is_stmt
= lh
.default_is_stmt
;
4005 int basic_block
= 0;
4006 int end_sequence
= 0;
4008 /* Start a subfile for the current file of the state machine. */
4009 if (files
.num_files
>= file
)
4011 /* The file and directory tables are 0 based, the references
4013 dwarf2_start_subfile (files
.files
[file
- 1].name
,
4014 (files
.files
[file
- 1].dir
4015 ? dirs
.dirs
[files
.files
[file
- 1].dir
- 1]
4019 /* Decode the table. */
4020 while (!end_sequence
)
4022 op_code
= read_1_byte (abfd
, line_ptr
);
4025 if (op_code
>= lh
.opcode_base
)
4026 { /* Special operand. */
4027 adj_opcode
= op_code
- lh
.opcode_base
;
4028 address
+= (adj_opcode
/ lh
.line_range
)
4029 * lh
.minimum_instruction_length
;
4030 line
+= lh
.line_base
+ (adj_opcode
% lh
.line_range
);
4031 /* append row to matrix using current values */
4032 record_line (current_subfile
, line
, address
);
4035 else switch (op_code
)
4037 case DW_LNS_extended_op
:
4038 line_ptr
+= 1; /* ignore length */
4039 extended_op
= read_1_byte (abfd
, line_ptr
);
4041 switch (extended_op
)
4043 case DW_LNE_end_sequence
:
4045 /* Don't call record_line here. The end_sequence
4046 instruction provides the address of the first byte
4047 *after* the last line in the sequence; it's not the
4048 address of any real source line. However, the GDB
4049 linetable structure only records the starts of lines,
4050 not the ends. This is a weakness of GDB. */
4052 case DW_LNE_set_address
:
4053 address
= read_address (abfd
, line_ptr
, cu_header
, &bytes_read
);
4054 line_ptr
+= bytes_read
;
4055 address
+= baseaddr
;
4057 case DW_LNE_define_file
:
4058 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
4059 line_ptr
+= bytes_read
;
4060 if ((files
.num_files
% FILE_ALLOC_CHUNK
) == 0)
4062 files
.files
= (struct fileinfo
*)
4063 xrealloc (files
.files
,
4064 (files
.num_files
+ FILE_ALLOC_CHUNK
)
4065 * sizeof (struct fileinfo
));
4066 if (files
.num_files
== 0)
4067 make_cleanup (free_current_contents
, &files
.files
);
4069 files
.files
[files
.num_files
].name
= cur_file
;
4070 files
.files
[files
.num_files
].dir
=
4071 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
4072 line_ptr
+= bytes_read
;
4073 files
.files
[files
.num_files
].time
=
4074 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
4075 line_ptr
+= bytes_read
;
4076 files
.files
[files
.num_files
].size
=
4077 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
4078 line_ptr
+= bytes_read
;
4082 complain (&dwarf2_mangled_line_number_section
);
4087 record_line (current_subfile
, line
, address
);
4090 case DW_LNS_advance_pc
:
4091 address
+= lh
.minimum_instruction_length
4092 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
4093 line_ptr
+= bytes_read
;
4095 case DW_LNS_advance_line
:
4096 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
4097 line_ptr
+= bytes_read
;
4099 case DW_LNS_set_file
:
4100 /* The file and directory tables are 0 based, the references
4102 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
4103 line_ptr
+= bytes_read
;
4104 dwarf2_start_subfile
4105 (files
.files
[file
- 1].name
,
4106 (files
.files
[file
- 1].dir
4107 ? dirs
.dirs
[files
.files
[file
- 1].dir
- 1]
4110 case DW_LNS_set_column
:
4111 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
4112 line_ptr
+= bytes_read
;
4114 case DW_LNS_negate_stmt
:
4115 is_stmt
= (!is_stmt
);
4117 case DW_LNS_set_basic_block
:
4120 /* Add to the address register of the state machine the
4121 address increment value corresponding to special opcode
4122 255. Ie, this value is scaled by the minimum instruction
4123 length since special opcode 255 would have scaled the
4125 case DW_LNS_const_add_pc
:
4126 address
+= (lh
.minimum_instruction_length
4127 * ((255 - lh
.opcode_base
) / lh
.line_range
));
4129 case DW_LNS_fixed_advance_pc
:
4130 address
+= read_2_bytes (abfd
, line_ptr
);
4134 { /* Unknown standard opcode, ignore it. */
4136 for (i
= 0; i
< lh
.standard_opcode_lengths
[op_code
]; i
++)
4138 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
4139 line_ptr
+= bytes_read
;
4146 do_cleanups (back_to
);
4149 /* Start a subfile for DWARF. FILENAME is the name of the file and
4150 DIRNAME the name of the source directory which contains FILENAME
4151 or NULL if not known.
4152 This routine tries to keep line numbers from identical absolute and
4153 relative file names in a common subfile.
4155 Using the `list' example from the GDB testsuite, which resides in
4156 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
4157 of /srcdir/list0.c yields the following debugging information for list0.c:
4159 DW_AT_name: /srcdir/list0.c
4160 DW_AT_comp_dir: /compdir
4161 files.files[0].name: list0.h
4162 files.files[0].dir: /srcdir
4163 files.files[1].name: list0.c
4164 files.files[1].dir: /srcdir
4166 The line number information for list0.c has to end up in a single
4167 subfile, so that `break /srcdir/list0.c:1' works as expected. */
4170 dwarf2_start_subfile (char *filename
, char *dirname
)
4172 /* If the filename isn't absolute, try to match an existing subfile
4173 with the full pathname. */
4175 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
4177 struct subfile
*subfile
;
4178 char *fullname
= concat (dirname
, "/", filename
, NULL
);
4180 for (subfile
= subfiles
; subfile
; subfile
= subfile
->next
)
4182 if (FILENAME_CMP (subfile
->name
, fullname
) == 0)
4184 current_subfile
= subfile
;
4191 start_subfile (filename
, dirname
);
4194 /* Given a pointer to a DWARF information entry, figure out if we need
4195 to make a symbol table entry for it, and if so, create a new entry
4196 and return a pointer to it.
4197 If TYPE is NULL, determine symbol type from the die, otherwise
4198 used the passed type. */
4200 static struct symbol
*
4201 new_symbol (struct die_info
*die
, struct type
*type
, struct objfile
*objfile
,
4202 const struct comp_unit_head
*cu_header
)
4204 struct symbol
*sym
= NULL
;
4206 struct attribute
*attr
= NULL
;
4207 struct attribute
*attr2
= NULL
;
4210 name
= dwarf2_linkage_name (die
);
4213 sym
= (struct symbol
*) obstack_alloc (&objfile
->symbol_obstack
,
4214 sizeof (struct symbol
));
4215 OBJSTAT (objfile
, n_syms
++);
4216 memset (sym
, 0, sizeof (struct symbol
));
4217 SYMBOL_NAME (sym
) = obsavestring (name
, strlen (name
),
4218 &objfile
->symbol_obstack
);
4220 /* Default assumptions.
4221 Use the passed type or decode it from the die. */
4222 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
4223 SYMBOL_CLASS (sym
) = LOC_STATIC
;
4225 SYMBOL_TYPE (sym
) = type
;
4227 SYMBOL_TYPE (sym
) = die_type (die
, objfile
, cu_header
);
4228 attr
= dwarf_attr (die
, DW_AT_decl_line
);
4231 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
4234 /* If this symbol is from a C++ compilation, then attempt to
4235 cache the demangled form for future reference. This is a
4236 typical time versus space tradeoff, that was decided in favor
4237 of time because it sped up C++ symbol lookups by a factor of
4240 SYMBOL_LANGUAGE (sym
) = cu_language
;
4241 SYMBOL_INIT_DEMANGLED_NAME (sym
, &objfile
->symbol_obstack
);
4245 attr
= dwarf_attr (die
, DW_AT_low_pc
);
4248 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
4250 SYMBOL_CLASS (sym
) = LOC_LABEL
;
4252 case DW_TAG_subprogram
:
4253 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
4255 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
4256 attr2
= dwarf_attr (die
, DW_AT_external
);
4257 if (attr2
&& (DW_UNSND (attr2
) != 0))
4259 add_symbol_to_list (sym
, &global_symbols
);
4263 add_symbol_to_list (sym
, list_in_scope
);
4266 case DW_TAG_variable
:
4267 /* Compilation with minimal debug info may result in variables
4268 with missing type entries. Change the misleading `void' type
4269 to something sensible. */
4270 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
4271 SYMBOL_TYPE (sym
) = init_type (TYPE_CODE_INT
,
4272 TARGET_INT_BIT
/ HOST_CHAR_BIT
, 0,
4273 "<variable, no debug info>",
4275 attr
= dwarf_attr (die
, DW_AT_const_value
);
4278 dwarf2_const_value (attr
, sym
, objfile
, cu_header
);
4279 attr2
= dwarf_attr (die
, DW_AT_external
);
4280 if (attr2
&& (DW_UNSND (attr2
) != 0))
4281 add_symbol_to_list (sym
, &global_symbols
);
4283 add_symbol_to_list (sym
, list_in_scope
);
4286 attr
= dwarf_attr (die
, DW_AT_location
);
4289 attr2
= dwarf_attr (die
, DW_AT_external
);
4290 if (attr2
&& (DW_UNSND (attr2
) != 0))
4292 SYMBOL_VALUE_ADDRESS (sym
) =
4293 decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
);
4294 add_symbol_to_list (sym
, &global_symbols
);
4296 /* In shared libraries the address of the variable
4297 in the location descriptor might still be relocatable,
4298 so its value could be zero.
4299 Enter the symbol as a LOC_UNRESOLVED symbol, if its
4300 value is zero, the address of the variable will then
4301 be determined from the minimal symbol table whenever
4302 the variable is referenced. */
4303 if (SYMBOL_VALUE_ADDRESS (sym
))
4305 fixup_symbol_section (sym
, objfile
);
4306 SYMBOL_VALUE_ADDRESS (sym
) +=
4307 ANOFFSET (objfile
->section_offsets
,
4308 SYMBOL_SECTION (sym
));
4309 SYMBOL_CLASS (sym
) = LOC_STATIC
;
4312 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
4316 SYMBOL_VALUE (sym
) = addr
=
4317 decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
);
4318 add_symbol_to_list (sym
, list_in_scope
);
4321 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
4325 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
4326 SYMBOL_VALUE (sym
) =
4327 DWARF2_REG_TO_REGNUM (SYMBOL_VALUE (sym
));
4331 SYMBOL_CLASS (sym
) = LOC_BASEREG
;
4332 SYMBOL_BASEREG (sym
) = DWARF2_REG_TO_REGNUM (basereg
);
4336 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
4340 fixup_symbol_section (sym
, objfile
);
4341 SYMBOL_VALUE_ADDRESS (sym
) =
4342 addr
+ ANOFFSET (objfile
->section_offsets
,
4343 SYMBOL_SECTION (sym
));
4344 SYMBOL_CLASS (sym
) = LOC_STATIC
;
4350 /* We do not know the address of this symbol.
4351 If it is an external symbol and we have type information
4352 for it, enter the symbol as a LOC_UNRESOLVED symbol.
4353 The address of the variable will then be determined from
4354 the minimal symbol table whenever the variable is
4356 attr2
= dwarf_attr (die
, DW_AT_external
);
4357 if (attr2
&& (DW_UNSND (attr2
) != 0)
4358 && dwarf_attr (die
, DW_AT_type
) != NULL
)
4360 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
4361 add_symbol_to_list (sym
, &global_symbols
);
4365 case DW_TAG_formal_parameter
:
4366 attr
= dwarf_attr (die
, DW_AT_location
);
4369 SYMBOL_VALUE (sym
) =
4370 decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
);
4373 SYMBOL_CLASS (sym
) = LOC_REGPARM
;
4374 SYMBOL_VALUE (sym
) =
4375 DWARF2_REG_TO_REGNUM (SYMBOL_VALUE (sym
));
4381 if (basereg
!= frame_base_reg
)
4382 complain (&dwarf2_complex_location_expr
);
4383 SYMBOL_CLASS (sym
) = LOC_REF_ARG
;
4387 SYMBOL_CLASS (sym
) = LOC_BASEREG_ARG
;
4388 SYMBOL_BASEREG (sym
) = DWARF2_REG_TO_REGNUM (basereg
);
4393 SYMBOL_CLASS (sym
) = LOC_ARG
;
4396 attr
= dwarf_attr (die
, DW_AT_const_value
);
4399 dwarf2_const_value (attr
, sym
, objfile
, cu_header
);
4401 add_symbol_to_list (sym
, list_in_scope
);
4403 case DW_TAG_unspecified_parameters
:
4404 /* From varargs functions; gdb doesn't seem to have any
4405 interest in this information, so just ignore it for now.
4408 case DW_TAG_class_type
:
4409 case DW_TAG_structure_type
:
4410 case DW_TAG_union_type
:
4411 case DW_TAG_enumeration_type
:
4412 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
4413 SYMBOL_NAMESPACE (sym
) = STRUCT_NAMESPACE
;
4414 add_symbol_to_list (sym
, list_in_scope
);
4416 /* The semantics of C++ state that "struct foo { ... }" also
4417 defines a typedef for "foo". Synthesize a typedef symbol so
4418 that "ptype foo" works as expected. */
4419 if (cu_language
== language_cplus
)
4421 struct symbol
*typedef_sym
= (struct symbol
*)
4422 obstack_alloc (&objfile
->symbol_obstack
,
4423 sizeof (struct symbol
));
4424 *typedef_sym
= *sym
;
4425 SYMBOL_NAMESPACE (typedef_sym
) = VAR_NAMESPACE
;
4426 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
4427 TYPE_NAME (SYMBOL_TYPE (sym
)) =
4428 obsavestring (SYMBOL_NAME (sym
),
4429 strlen (SYMBOL_NAME (sym
)),
4430 &objfile
->type_obstack
);
4431 add_symbol_to_list (typedef_sym
, list_in_scope
);
4434 case DW_TAG_typedef
:
4435 case DW_TAG_base_type
:
4436 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
4437 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
4438 add_symbol_to_list (sym
, list_in_scope
);
4440 case DW_TAG_enumerator
:
4441 attr
= dwarf_attr (die
, DW_AT_const_value
);
4444 dwarf2_const_value (attr
, sym
, objfile
, cu_header
);
4446 add_symbol_to_list (sym
, list_in_scope
);
4449 /* Not a tag we recognize. Hopefully we aren't processing
4450 trash data, but since we must specifically ignore things
4451 we don't recognize, there is nothing else we should do at
4453 complain (&dwarf2_unsupported_tag
, dwarf_tag_name (die
->tag
));
4460 /* Copy constant value from an attribute to a symbol. */
4463 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
4464 struct objfile
*objfile
,
4465 const struct comp_unit_head
*cu_header
)
4467 struct dwarf_block
*blk
;
4472 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
4473 complain (&dwarf2_const_value_length_mismatch
, SYMBOL_NAME (sym
),
4474 cu_header
->addr_size
, TYPE_LENGTH (SYMBOL_TYPE (sym
)));
4475 SYMBOL_VALUE_BYTES (sym
) = (char *)
4476 obstack_alloc (&objfile
->symbol_obstack
, cu_header
->addr_size
);
4477 store_address (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
4479 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
4481 case DW_FORM_block1
:
4482 case DW_FORM_block2
:
4483 case DW_FORM_block4
:
4485 blk
= DW_BLOCK (attr
);
4486 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
4487 complain (&dwarf2_const_value_length_mismatch
, SYMBOL_NAME (sym
),
4488 blk
->size
, TYPE_LENGTH (SYMBOL_TYPE (sym
)));
4489 SYMBOL_VALUE_BYTES (sym
) = (char *)
4490 obstack_alloc (&objfile
->symbol_obstack
, blk
->size
);
4491 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
4492 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
4495 /* The DW_AT_const_value attributes are supposed to carry the
4496 symbol's value "represented as it would be on the target
4497 architecture." By the time we get here, it's already been
4498 converted to host endianness, so we just need to sign- or
4499 zero-extend it as appropriate. */
4501 dwarf2_const_value_data (attr
, sym
, 8);
4504 dwarf2_const_value_data (attr
, sym
, 16);
4507 dwarf2_const_value_data (attr
, sym
, 32);
4510 dwarf2_const_value_data (attr
, sym
, 64);
4514 SYMBOL_VALUE (sym
) = DW_SND (attr
);
4515 SYMBOL_CLASS (sym
) = LOC_CONST
;
4519 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
4520 SYMBOL_CLASS (sym
) = LOC_CONST
;
4524 complain (&dwarf2_unsupported_const_value_attr
,
4525 dwarf_form_name (attr
->form
));
4526 SYMBOL_VALUE (sym
) = 0;
4527 SYMBOL_CLASS (sym
) = LOC_CONST
;
4533 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
4534 or zero-extend it as appropriate for the symbol's type. */
4536 dwarf2_const_value_data (struct attribute
*attr
,
4540 LONGEST l
= DW_UNSND (attr
);
4542 if (bits
< sizeof (l
) * 8)
4544 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
4545 l
&= ((LONGEST
) 1 << bits
) - 1;
4547 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
4550 SYMBOL_VALUE (sym
) = l
;
4551 SYMBOL_CLASS (sym
) = LOC_CONST
;
4555 /* Return the type of the die in question using its DW_AT_type attribute. */
4557 static struct type
*
4558 die_type (struct die_info
*die
, struct objfile
*objfile
,
4559 const struct comp_unit_head
*cu_header
)
4562 struct attribute
*type_attr
;
4563 struct die_info
*type_die
;
4566 type_attr
= dwarf_attr (die
, DW_AT_type
);
4569 /* A missing DW_AT_type represents a void type. */
4570 return dwarf2_fundamental_type (objfile
, FT_VOID
);
4574 ref
= dwarf2_get_ref_die_offset (type_attr
);
4575 type_die
= follow_die_ref (ref
);
4578 error ("Dwarf Error: Cannot find referent at offset %d.", ref
);
4582 type
= tag_type_to_type (type_die
, objfile
, cu_header
);
4585 dump_die (type_die
);
4586 error ("Dwarf Error: Problem turning type die at offset into gdb type.");
4591 /* Return the containing type of the die in question using its
4592 DW_AT_containing_type attribute. */
4594 static struct type
*
4595 die_containing_type (struct die_info
*die
, struct objfile
*objfile
,
4596 const struct comp_unit_head
*cu_header
)
4598 struct type
*type
= NULL
;
4599 struct attribute
*type_attr
;
4600 struct die_info
*type_die
= NULL
;
4603 type_attr
= dwarf_attr (die
, DW_AT_containing_type
);
4606 ref
= dwarf2_get_ref_die_offset (type_attr
);
4607 type_die
= follow_die_ref (ref
);
4610 error ("Dwarf Error: Cannot find referent at offset %d.", ref
);
4613 type
= tag_type_to_type (type_die
, objfile
, cu_header
);
4618 dump_die (type_die
);
4619 error ("Dwarf Error: Problem turning containing type into gdb type.");
4625 static struct type
*
4626 type_at_offset (unsigned int offset
, struct objfile
*objfile
)
4628 struct die_info
*die
;
4631 die
= follow_die_ref (offset
);
4634 error ("Dwarf Error: Cannot find type referent at offset %d.", offset
);
4637 type
= tag_type_to_type (die
, objfile
);
4642 static struct type
*
4643 tag_type_to_type (struct die_info
*die
, struct objfile
*objfile
,
4644 const struct comp_unit_head
*cu_header
)
4652 read_type_die (die
, objfile
, cu_header
);
4656 error ("Dwarf Error: Cannot find type of die.");
4663 read_type_die (struct die_info
*die
, struct objfile
*objfile
,
4664 const struct comp_unit_head
*cu_header
)
4668 case DW_TAG_class_type
:
4669 case DW_TAG_structure_type
:
4670 case DW_TAG_union_type
:
4671 read_structure_scope (die
, objfile
, cu_header
);
4673 case DW_TAG_enumeration_type
:
4674 read_enumeration (die
, objfile
, cu_header
);
4676 case DW_TAG_subprogram
:
4677 case DW_TAG_subroutine_type
:
4678 read_subroutine_type (die
, objfile
, cu_header
);
4680 case DW_TAG_array_type
:
4681 read_array_type (die
, objfile
, cu_header
);
4683 case DW_TAG_pointer_type
:
4684 read_tag_pointer_type (die
, objfile
, cu_header
);
4686 case DW_TAG_ptr_to_member_type
:
4687 read_tag_ptr_to_member_type (die
, objfile
, cu_header
);
4689 case DW_TAG_reference_type
:
4690 read_tag_reference_type (die
, objfile
, cu_header
);
4692 case DW_TAG_const_type
:
4693 read_tag_const_type (die
, objfile
, cu_header
);
4695 case DW_TAG_volatile_type
:
4696 read_tag_volatile_type (die
, objfile
, cu_header
);
4698 case DW_TAG_string_type
:
4699 read_tag_string_type (die
, objfile
);
4701 case DW_TAG_typedef
:
4702 read_typedef (die
, objfile
, cu_header
);
4704 case DW_TAG_base_type
:
4705 read_base_type (die
, objfile
);
4708 complain (&dwarf2_unexpected_tag
, dwarf_tag_name (die
->tag
));
4713 static struct type
*
4714 dwarf_base_type (int encoding
, int size
, struct objfile
*objfile
)
4716 /* FIXME - this should not produce a new (struct type *)
4717 every time. It should cache base types. */
4721 case DW_ATE_address
:
4722 type
= dwarf2_fundamental_type (objfile
, FT_VOID
);
4724 case DW_ATE_boolean
:
4725 type
= dwarf2_fundamental_type (objfile
, FT_BOOLEAN
);
4727 case DW_ATE_complex_float
:
4730 type
= dwarf2_fundamental_type (objfile
, FT_DBL_PREC_COMPLEX
);
4734 type
= dwarf2_fundamental_type (objfile
, FT_COMPLEX
);
4740 type
= dwarf2_fundamental_type (objfile
, FT_DBL_PREC_FLOAT
);
4744 type
= dwarf2_fundamental_type (objfile
, FT_FLOAT
);
4751 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_CHAR
);
4754 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_SHORT
);
4758 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_INTEGER
);
4762 case DW_ATE_signed_char
:
4763 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_CHAR
);
4765 case DW_ATE_unsigned
:
4769 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_CHAR
);
4772 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_SHORT
);
4776 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_INTEGER
);
4780 case DW_ATE_unsigned_char
:
4781 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_CHAR
);
4784 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_INTEGER
);
4791 copy_die (struct die_info
*old_die
)
4793 struct die_info
*new_die
;
4796 new_die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
4797 memset (new_die
, 0, sizeof (struct die_info
));
4799 new_die
->tag
= old_die
->tag
;
4800 new_die
->has_children
= old_die
->has_children
;
4801 new_die
->abbrev
= old_die
->abbrev
;
4802 new_die
->offset
= old_die
->offset
;
4803 new_die
->type
= NULL
;
4805 num_attrs
= old_die
->num_attrs
;
4806 new_die
->num_attrs
= num_attrs
;
4807 new_die
->attrs
= (struct attribute
*)
4808 xmalloc (num_attrs
* sizeof (struct attribute
));
4810 for (i
= 0; i
< old_die
->num_attrs
; ++i
)
4812 new_die
->attrs
[i
].name
= old_die
->attrs
[i
].name
;
4813 new_die
->attrs
[i
].form
= old_die
->attrs
[i
].form
;
4814 new_die
->attrs
[i
].u
.addr
= old_die
->attrs
[i
].u
.addr
;
4817 new_die
->next
= NULL
;
4822 /* Return sibling of die, NULL if no sibling. */
4824 static struct die_info
*
4825 sibling_die (struct die_info
*die
)
4827 int nesting_level
= 0;
4829 if (!die
->has_children
)
4831 if (die
->next
&& (die
->next
->tag
== 0))
4844 if (die
->has_children
)
4854 while (nesting_level
);
4855 if (die
&& (die
->tag
== 0))
4866 /* Get linkage name of a die, return NULL if not found. */
4869 dwarf2_linkage_name (struct die_info
*die
)
4871 struct attribute
*attr
;
4873 attr
= dwarf_attr (die
, DW_AT_MIPS_linkage_name
);
4874 if (attr
&& DW_STRING (attr
))
4875 return DW_STRING (attr
);
4876 attr
= dwarf_attr (die
, DW_AT_name
);
4877 if (attr
&& DW_STRING (attr
))
4878 return DW_STRING (attr
);
4882 /* Convert a DIE tag into its string name. */
4885 dwarf_tag_name (register unsigned tag
)
4889 case DW_TAG_padding
:
4890 return "DW_TAG_padding";
4891 case DW_TAG_array_type
:
4892 return "DW_TAG_array_type";
4893 case DW_TAG_class_type
:
4894 return "DW_TAG_class_type";
4895 case DW_TAG_entry_point
:
4896 return "DW_TAG_entry_point";
4897 case DW_TAG_enumeration_type
:
4898 return "DW_TAG_enumeration_type";
4899 case DW_TAG_formal_parameter
:
4900 return "DW_TAG_formal_parameter";
4901 case DW_TAG_imported_declaration
:
4902 return "DW_TAG_imported_declaration";
4904 return "DW_TAG_label";
4905 case DW_TAG_lexical_block
:
4906 return "DW_TAG_lexical_block";
4908 return "DW_TAG_member";
4909 case DW_TAG_pointer_type
:
4910 return "DW_TAG_pointer_type";
4911 case DW_TAG_reference_type
:
4912 return "DW_TAG_reference_type";
4913 case DW_TAG_compile_unit
:
4914 return "DW_TAG_compile_unit";
4915 case DW_TAG_string_type
:
4916 return "DW_TAG_string_type";
4917 case DW_TAG_structure_type
:
4918 return "DW_TAG_structure_type";
4919 case DW_TAG_subroutine_type
:
4920 return "DW_TAG_subroutine_type";
4921 case DW_TAG_typedef
:
4922 return "DW_TAG_typedef";
4923 case DW_TAG_union_type
:
4924 return "DW_TAG_union_type";
4925 case DW_TAG_unspecified_parameters
:
4926 return "DW_TAG_unspecified_parameters";
4927 case DW_TAG_variant
:
4928 return "DW_TAG_variant";
4929 case DW_TAG_common_block
:
4930 return "DW_TAG_common_block";
4931 case DW_TAG_common_inclusion
:
4932 return "DW_TAG_common_inclusion";
4933 case DW_TAG_inheritance
:
4934 return "DW_TAG_inheritance";
4935 case DW_TAG_inlined_subroutine
:
4936 return "DW_TAG_inlined_subroutine";
4938 return "DW_TAG_module";
4939 case DW_TAG_ptr_to_member_type
:
4940 return "DW_TAG_ptr_to_member_type";
4941 case DW_TAG_set_type
:
4942 return "DW_TAG_set_type";
4943 case DW_TAG_subrange_type
:
4944 return "DW_TAG_subrange_type";
4945 case DW_TAG_with_stmt
:
4946 return "DW_TAG_with_stmt";
4947 case DW_TAG_access_declaration
:
4948 return "DW_TAG_access_declaration";
4949 case DW_TAG_base_type
:
4950 return "DW_TAG_base_type";
4951 case DW_TAG_catch_block
:
4952 return "DW_TAG_catch_block";
4953 case DW_TAG_const_type
:
4954 return "DW_TAG_const_type";
4955 case DW_TAG_constant
:
4956 return "DW_TAG_constant";
4957 case DW_TAG_enumerator
:
4958 return "DW_TAG_enumerator";
4959 case DW_TAG_file_type
:
4960 return "DW_TAG_file_type";
4962 return "DW_TAG_friend";
4963 case DW_TAG_namelist
:
4964 return "DW_TAG_namelist";
4965 case DW_TAG_namelist_item
:
4966 return "DW_TAG_namelist_item";
4967 case DW_TAG_packed_type
:
4968 return "DW_TAG_packed_type";
4969 case DW_TAG_subprogram
:
4970 return "DW_TAG_subprogram";
4971 case DW_TAG_template_type_param
:
4972 return "DW_TAG_template_type_param";
4973 case DW_TAG_template_value_param
:
4974 return "DW_TAG_template_value_param";
4975 case DW_TAG_thrown_type
:
4976 return "DW_TAG_thrown_type";
4977 case DW_TAG_try_block
:
4978 return "DW_TAG_try_block";
4979 case DW_TAG_variant_part
:
4980 return "DW_TAG_variant_part";
4981 case DW_TAG_variable
:
4982 return "DW_TAG_variable";
4983 case DW_TAG_volatile_type
:
4984 return "DW_TAG_volatile_type";
4985 case DW_TAG_MIPS_loop
:
4986 return "DW_TAG_MIPS_loop";
4987 case DW_TAG_format_label
:
4988 return "DW_TAG_format_label";
4989 case DW_TAG_function_template
:
4990 return "DW_TAG_function_template";
4991 case DW_TAG_class_template
:
4992 return "DW_TAG_class_template";
4994 return "DW_TAG_<unknown>";
4998 /* Convert a DWARF attribute code into its string name. */
5001 dwarf_attr_name (register unsigned attr
)
5006 return "DW_AT_sibling";
5007 case DW_AT_location
:
5008 return "DW_AT_location";
5010 return "DW_AT_name";
5011 case DW_AT_ordering
:
5012 return "DW_AT_ordering";
5013 case DW_AT_subscr_data
:
5014 return "DW_AT_subscr_data";
5015 case DW_AT_byte_size
:
5016 return "DW_AT_byte_size";
5017 case DW_AT_bit_offset
:
5018 return "DW_AT_bit_offset";
5019 case DW_AT_bit_size
:
5020 return "DW_AT_bit_size";
5021 case DW_AT_element_list
:
5022 return "DW_AT_element_list";
5023 case DW_AT_stmt_list
:
5024 return "DW_AT_stmt_list";
5026 return "DW_AT_low_pc";
5028 return "DW_AT_high_pc";
5029 case DW_AT_language
:
5030 return "DW_AT_language";
5032 return "DW_AT_member";
5034 return "DW_AT_discr";
5035 case DW_AT_discr_value
:
5036 return "DW_AT_discr_value";
5037 case DW_AT_visibility
:
5038 return "DW_AT_visibility";
5040 return "DW_AT_import";
5041 case DW_AT_string_length
:
5042 return "DW_AT_string_length";
5043 case DW_AT_common_reference
:
5044 return "DW_AT_common_reference";
5045 case DW_AT_comp_dir
:
5046 return "DW_AT_comp_dir";
5047 case DW_AT_const_value
:
5048 return "DW_AT_const_value";
5049 case DW_AT_containing_type
:
5050 return "DW_AT_containing_type";
5051 case DW_AT_default_value
:
5052 return "DW_AT_default_value";
5054 return "DW_AT_inline";
5055 case DW_AT_is_optional
:
5056 return "DW_AT_is_optional";
5057 case DW_AT_lower_bound
:
5058 return "DW_AT_lower_bound";
5059 case DW_AT_producer
:
5060 return "DW_AT_producer";
5061 case DW_AT_prototyped
:
5062 return "DW_AT_prototyped";
5063 case DW_AT_return_addr
:
5064 return "DW_AT_return_addr";
5065 case DW_AT_start_scope
:
5066 return "DW_AT_start_scope";
5067 case DW_AT_stride_size
:
5068 return "DW_AT_stride_size";
5069 case DW_AT_upper_bound
:
5070 return "DW_AT_upper_bound";
5071 case DW_AT_abstract_origin
:
5072 return "DW_AT_abstract_origin";
5073 case DW_AT_accessibility
:
5074 return "DW_AT_accessibility";
5075 case DW_AT_address_class
:
5076 return "DW_AT_address_class";
5077 case DW_AT_artificial
:
5078 return "DW_AT_artificial";
5079 case DW_AT_base_types
:
5080 return "DW_AT_base_types";
5081 case DW_AT_calling_convention
:
5082 return "DW_AT_calling_convention";
5084 return "DW_AT_count";
5085 case DW_AT_data_member_location
:
5086 return "DW_AT_data_member_location";
5087 case DW_AT_decl_column
:
5088 return "DW_AT_decl_column";
5089 case DW_AT_decl_file
:
5090 return "DW_AT_decl_file";
5091 case DW_AT_decl_line
:
5092 return "DW_AT_decl_line";
5093 case DW_AT_declaration
:
5094 return "DW_AT_declaration";
5095 case DW_AT_discr_list
:
5096 return "DW_AT_discr_list";
5097 case DW_AT_encoding
:
5098 return "DW_AT_encoding";
5099 case DW_AT_external
:
5100 return "DW_AT_external";
5101 case DW_AT_frame_base
:
5102 return "DW_AT_frame_base";
5104 return "DW_AT_friend";
5105 case DW_AT_identifier_case
:
5106 return "DW_AT_identifier_case";
5107 case DW_AT_macro_info
:
5108 return "DW_AT_macro_info";
5109 case DW_AT_namelist_items
:
5110 return "DW_AT_namelist_items";
5111 case DW_AT_priority
:
5112 return "DW_AT_priority";
5114 return "DW_AT_segment";
5115 case DW_AT_specification
:
5116 return "DW_AT_specification";
5117 case DW_AT_static_link
:
5118 return "DW_AT_static_link";
5120 return "DW_AT_type";
5121 case DW_AT_use_location
:
5122 return "DW_AT_use_location";
5123 case DW_AT_variable_parameter
:
5124 return "DW_AT_variable_parameter";
5125 case DW_AT_virtuality
:
5126 return "DW_AT_virtuality";
5127 case DW_AT_vtable_elem_location
:
5128 return "DW_AT_vtable_elem_location";
5131 case DW_AT_MIPS_fde
:
5132 return "DW_AT_MIPS_fde";
5133 case DW_AT_MIPS_loop_begin
:
5134 return "DW_AT_MIPS_loop_begin";
5135 case DW_AT_MIPS_tail_loop_begin
:
5136 return "DW_AT_MIPS_tail_loop_begin";
5137 case DW_AT_MIPS_epilog_begin
:
5138 return "DW_AT_MIPS_epilog_begin";
5139 case DW_AT_MIPS_loop_unroll_factor
:
5140 return "DW_AT_MIPS_loop_unroll_factor";
5141 case DW_AT_MIPS_software_pipeline_depth
:
5142 return "DW_AT_MIPS_software_pipeline_depth";
5143 case DW_AT_MIPS_linkage_name
:
5144 return "DW_AT_MIPS_linkage_name";
5147 case DW_AT_sf_names
:
5148 return "DW_AT_sf_names";
5149 case DW_AT_src_info
:
5150 return "DW_AT_src_info";
5151 case DW_AT_mac_info
:
5152 return "DW_AT_mac_info";
5153 case DW_AT_src_coords
:
5154 return "DW_AT_src_coords";
5155 case DW_AT_body_begin
:
5156 return "DW_AT_body_begin";
5157 case DW_AT_body_end
:
5158 return "DW_AT_body_end";
5160 return "DW_AT_<unknown>";
5164 /* Convert a DWARF value form code into its string name. */
5167 dwarf_form_name (register unsigned form
)
5172 return "DW_FORM_addr";
5173 case DW_FORM_block2
:
5174 return "DW_FORM_block2";
5175 case DW_FORM_block4
:
5176 return "DW_FORM_block4";
5178 return "DW_FORM_data2";
5180 return "DW_FORM_data4";
5182 return "DW_FORM_data8";
5183 case DW_FORM_string
:
5184 return "DW_FORM_string";
5186 return "DW_FORM_block";
5187 case DW_FORM_block1
:
5188 return "DW_FORM_block1";
5190 return "DW_FORM_data1";
5192 return "DW_FORM_flag";
5194 return "DW_FORM_sdata";
5196 return "DW_FORM_strp";
5198 return "DW_FORM_udata";
5199 case DW_FORM_ref_addr
:
5200 return "DW_FORM_ref_addr";
5202 return "DW_FORM_ref1";
5204 return "DW_FORM_ref2";
5206 return "DW_FORM_ref4";
5208 return "DW_FORM_ref8";
5209 case DW_FORM_ref_udata
:
5210 return "DW_FORM_ref_udata";
5211 case DW_FORM_indirect
:
5212 return "DW_FORM_indirect";
5214 return "DW_FORM_<unknown>";
5218 /* Convert a DWARF stack opcode into its string name. */
5221 dwarf_stack_op_name (register unsigned op
)
5226 return "DW_OP_addr";
5228 return "DW_OP_deref";
5230 return "DW_OP_const1u";
5232 return "DW_OP_const1s";
5234 return "DW_OP_const2u";
5236 return "DW_OP_const2s";
5238 return "DW_OP_const4u";
5240 return "DW_OP_const4s";
5242 return "DW_OP_const8u";
5244 return "DW_OP_const8s";
5246 return "DW_OP_constu";
5248 return "DW_OP_consts";
5252 return "DW_OP_drop";
5254 return "DW_OP_over";
5256 return "DW_OP_pick";
5258 return "DW_OP_swap";
5262 return "DW_OP_xderef";
5270 return "DW_OP_minus";
5282 return "DW_OP_plus";
5283 case DW_OP_plus_uconst
:
5284 return "DW_OP_plus_uconst";
5290 return "DW_OP_shra";
5308 return "DW_OP_skip";
5310 return "DW_OP_lit0";
5312 return "DW_OP_lit1";
5314 return "DW_OP_lit2";
5316 return "DW_OP_lit3";
5318 return "DW_OP_lit4";
5320 return "DW_OP_lit5";
5322 return "DW_OP_lit6";
5324 return "DW_OP_lit7";
5326 return "DW_OP_lit8";
5328 return "DW_OP_lit9";
5330 return "DW_OP_lit10";
5332 return "DW_OP_lit11";
5334 return "DW_OP_lit12";
5336 return "DW_OP_lit13";
5338 return "DW_OP_lit14";
5340 return "DW_OP_lit15";
5342 return "DW_OP_lit16";
5344 return "DW_OP_lit17";
5346 return "DW_OP_lit18";
5348 return "DW_OP_lit19";
5350 return "DW_OP_lit20";
5352 return "DW_OP_lit21";
5354 return "DW_OP_lit22";
5356 return "DW_OP_lit23";
5358 return "DW_OP_lit24";
5360 return "DW_OP_lit25";
5362 return "DW_OP_lit26";
5364 return "DW_OP_lit27";
5366 return "DW_OP_lit28";
5368 return "DW_OP_lit29";
5370 return "DW_OP_lit30";
5372 return "DW_OP_lit31";
5374 return "DW_OP_reg0";
5376 return "DW_OP_reg1";
5378 return "DW_OP_reg2";
5380 return "DW_OP_reg3";
5382 return "DW_OP_reg4";
5384 return "DW_OP_reg5";
5386 return "DW_OP_reg6";
5388 return "DW_OP_reg7";
5390 return "DW_OP_reg8";
5392 return "DW_OP_reg9";
5394 return "DW_OP_reg10";
5396 return "DW_OP_reg11";
5398 return "DW_OP_reg12";
5400 return "DW_OP_reg13";
5402 return "DW_OP_reg14";
5404 return "DW_OP_reg15";
5406 return "DW_OP_reg16";
5408 return "DW_OP_reg17";
5410 return "DW_OP_reg18";
5412 return "DW_OP_reg19";
5414 return "DW_OP_reg20";
5416 return "DW_OP_reg21";
5418 return "DW_OP_reg22";
5420 return "DW_OP_reg23";
5422 return "DW_OP_reg24";
5424 return "DW_OP_reg25";
5426 return "DW_OP_reg26";
5428 return "DW_OP_reg27";
5430 return "DW_OP_reg28";
5432 return "DW_OP_reg29";
5434 return "DW_OP_reg30";
5436 return "DW_OP_reg31";
5438 return "DW_OP_breg0";
5440 return "DW_OP_breg1";
5442 return "DW_OP_breg2";
5444 return "DW_OP_breg3";
5446 return "DW_OP_breg4";
5448 return "DW_OP_breg5";
5450 return "DW_OP_breg6";
5452 return "DW_OP_breg7";
5454 return "DW_OP_breg8";
5456 return "DW_OP_breg9";
5458 return "DW_OP_breg10";
5460 return "DW_OP_breg11";
5462 return "DW_OP_breg12";
5464 return "DW_OP_breg13";
5466 return "DW_OP_breg14";
5468 return "DW_OP_breg15";
5470 return "DW_OP_breg16";
5472 return "DW_OP_breg17";
5474 return "DW_OP_breg18";
5476 return "DW_OP_breg19";
5478 return "DW_OP_breg20";
5480 return "DW_OP_breg21";
5482 return "DW_OP_breg22";
5484 return "DW_OP_breg23";
5486 return "DW_OP_breg24";
5488 return "DW_OP_breg25";
5490 return "DW_OP_breg26";
5492 return "DW_OP_breg27";
5494 return "DW_OP_breg28";
5496 return "DW_OP_breg29";
5498 return "DW_OP_breg30";
5500 return "DW_OP_breg31";
5502 return "DW_OP_regx";
5504 return "DW_OP_fbreg";
5506 return "DW_OP_bregx";
5508 return "DW_OP_piece";
5509 case DW_OP_deref_size
:
5510 return "DW_OP_deref_size";
5511 case DW_OP_xderef_size
:
5512 return "DW_OP_xderef_size";
5516 return "OP_<unknown>";
5521 dwarf_bool_name (unsigned mybool
)
5529 /* Convert a DWARF type code into its string name. */
5532 dwarf_type_encoding_name (register unsigned enc
)
5536 case DW_ATE_address
:
5537 return "DW_ATE_address";
5538 case DW_ATE_boolean
:
5539 return "DW_ATE_boolean";
5540 case DW_ATE_complex_float
:
5541 return "DW_ATE_complex_float";
5543 return "DW_ATE_float";
5545 return "DW_ATE_signed";
5546 case DW_ATE_signed_char
:
5547 return "DW_ATE_signed_char";
5548 case DW_ATE_unsigned
:
5549 return "DW_ATE_unsigned";
5550 case DW_ATE_unsigned_char
:
5551 return "DW_ATE_unsigned_char";
5553 return "DW_ATE_<unknown>";
5557 /* Convert a DWARF call frame info operation to its string name. */
5561 dwarf_cfi_name (register unsigned cfi_opc
)
5565 case DW_CFA_advance_loc
:
5566 return "DW_CFA_advance_loc";
5568 return "DW_CFA_offset";
5569 case DW_CFA_restore
:
5570 return "DW_CFA_restore";
5572 return "DW_CFA_nop";
5573 case DW_CFA_set_loc
:
5574 return "DW_CFA_set_loc";
5575 case DW_CFA_advance_loc1
:
5576 return "DW_CFA_advance_loc1";
5577 case DW_CFA_advance_loc2
:
5578 return "DW_CFA_advance_loc2";
5579 case DW_CFA_advance_loc4
:
5580 return "DW_CFA_advance_loc4";
5581 case DW_CFA_offset_extended
:
5582 return "DW_CFA_offset_extended";
5583 case DW_CFA_restore_extended
:
5584 return "DW_CFA_restore_extended";
5585 case DW_CFA_undefined
:
5586 return "DW_CFA_undefined";
5587 case DW_CFA_same_value
:
5588 return "DW_CFA_same_value";
5589 case DW_CFA_register
:
5590 return "DW_CFA_register";
5591 case DW_CFA_remember_state
:
5592 return "DW_CFA_remember_state";
5593 case DW_CFA_restore_state
:
5594 return "DW_CFA_restore_state";
5595 case DW_CFA_def_cfa
:
5596 return "DW_CFA_def_cfa";
5597 case DW_CFA_def_cfa_register
:
5598 return "DW_CFA_def_cfa_register";
5599 case DW_CFA_def_cfa_offset
:
5600 return "DW_CFA_def_cfa_offset";
5601 /* SGI/MIPS specific */
5602 case DW_CFA_MIPS_advance_loc8
:
5603 return "DW_CFA_MIPS_advance_loc8";
5605 return "DW_CFA_<unknown>";
5611 dump_die (struct die_info
*die
)
5615 fprintf (stderr
, "Die: %s (abbrev = %d, offset = %d)\n",
5616 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
5617 fprintf (stderr
, "\thas children: %s\n",
5618 dwarf_bool_name (die
->has_children
));
5620 fprintf (stderr
, "\tattributes:\n");
5621 for (i
= 0; i
< die
->num_attrs
; ++i
)
5623 fprintf (stderr
, "\t\t%s (%s) ",
5624 dwarf_attr_name (die
->attrs
[i
].name
),
5625 dwarf_form_name (die
->attrs
[i
].form
));
5626 switch (die
->attrs
[i
].form
)
5628 case DW_FORM_ref_addr
:
5630 fprintf (stderr
, "address: ");
5631 print_address_numeric (DW_ADDR (&die
->attrs
[i
]), 1, gdb_stderr
);
5633 case DW_FORM_block2
:
5634 case DW_FORM_block4
:
5636 case DW_FORM_block1
:
5637 fprintf (stderr
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
5648 fprintf (stderr
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
5650 case DW_FORM_string
:
5652 fprintf (stderr
, "string: \"%s\"",
5653 DW_STRING (&die
->attrs
[i
])
5654 ? DW_STRING (&die
->attrs
[i
]) : "");
5657 if (DW_UNSND (&die
->attrs
[i
]))
5658 fprintf (stderr
, "flag: TRUE");
5660 fprintf (stderr
, "flag: FALSE");
5662 case DW_FORM_indirect
:
5663 /* the reader will have reduced the indirect form to
5664 the "base form" so this form should not occur */
5665 fprintf (stderr
, "unexpected attribute form: DW_FORM_indirect");
5668 fprintf (stderr
, "unsupported attribute form: %d.",
5669 die
->attrs
[i
].form
);
5671 fprintf (stderr
, "\n");
5676 dump_die_list (struct die_info
*die
)
5686 store_in_ref_table (unsigned int offset
, struct die_info
*die
)
5689 struct die_info
*old
;
5691 h
= (offset
% REF_HASH_SIZE
);
5692 old
= die_ref_table
[h
];
5693 die
->next_ref
= old
;
5694 die_ref_table
[h
] = die
;
5699 dwarf2_empty_hash_tables (void)
5701 memset (die_ref_table
, 0, sizeof (die_ref_table
));
5705 dwarf2_get_ref_die_offset (struct attribute
*attr
)
5707 unsigned int result
= 0;
5711 case DW_FORM_ref_addr
:
5712 result
= DW_ADDR (attr
);
5718 case DW_FORM_ref_udata
:
5719 result
= cu_header_offset
+ DW_UNSND (attr
);
5722 complain (&dwarf2_unsupported_die_ref_attr
, dwarf_form_name (attr
->form
));
5727 static struct die_info
*
5728 follow_die_ref (unsigned int offset
)
5730 struct die_info
*die
;
5733 h
= (offset
% REF_HASH_SIZE
);
5734 die
= die_ref_table
[h
];
5737 if (die
->offset
== offset
)
5741 die
= die
->next_ref
;
5746 static struct type
*
5747 dwarf2_fundamental_type (struct objfile
*objfile
, int typeid)
5749 if (typeid < 0 || typeid >= FT_NUM_MEMBERS
)
5751 error ("Dwarf Error: internal error - invalid fundamental type id %d.",
5755 /* Look for this particular type in the fundamental type vector. If
5756 one is not found, create and install one appropriate for the
5757 current language and the current target machine. */
5759 if (ftypes
[typeid] == NULL
)
5761 ftypes
[typeid] = cu_language_defn
->la_fund_type (objfile
, typeid);
5764 return (ftypes
[typeid]);
5767 /* Decode simple location descriptions.
5768 Given a pointer to a dwarf block that defines a location, compute
5769 the location and return the value.
5771 FIXME: This is a kludge until we figure out a better
5772 way to handle the location descriptions.
5773 Gdb's design does not mesh well with the DWARF2 notion of a location
5774 computing interpreter, which is a shame because the flexibility goes unused.
5775 FIXME: Implement more operations as necessary.
5777 A location description containing no operations indicates that the
5778 object is optimized out. The global optimized_out flag is set for
5779 those, the return value is meaningless.
5781 When the result is a register number, the global isreg flag is set,
5782 otherwise it is cleared.
5784 When the result is a base register offset, the global offreg flag is set
5785 and the register number is returned in basereg, otherwise it is cleared.
5787 When the DW_OP_fbreg operation is encountered without a corresponding
5788 DW_AT_frame_base attribute, the global islocal flag is set.
5789 Hopefully the machine dependent code knows how to set up a virtual
5790 frame pointer for the local references.
5792 Note that stack[0] is unused except as a default error return.
5793 Note that stack overflow is not yet handled. */
5796 decode_locdesc (struct dwarf_block
*blk
, struct objfile
*objfile
,
5797 const struct comp_unit_head
*cu_header
)
5800 int size
= blk
->size
;
5801 char *data
= blk
->data
;
5802 CORE_ADDR stack
[64];
5804 unsigned int bytes_read
, unsnd
;
5854 stack
[++stacki
] = op
- DW_OP_lit0
;
5890 stack
[++stacki
] = op
- DW_OP_reg0
;
5895 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
5897 #if defined(HARRIS_TARGET) && defined(_M88K)
5898 /* The Harris 88110 gdb ports have long kept their special reg
5899 numbers between their gp-regs and their x-regs. This is
5900 not how our dwarf is generated. Punt. */
5903 stack
[++stacki
] = unsnd
;
5939 basereg
= op
- DW_OP_breg0
;
5940 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
5946 basereg
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
5948 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
5953 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
5955 if (frame_base_reg
>= 0)
5958 basereg
= frame_base_reg
;
5959 stack
[stacki
] += frame_base_offset
;
5963 complain (&dwarf2_missing_at_frame_base
);
5969 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
5970 cu_header
, &bytes_read
);
5975 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
5980 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
5985 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
5990 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
5995 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
6000 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
6005 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
6011 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
6016 stack
[stacki
+ 1] = stack
[stacki
];
6021 stack
[stacki
- 1] += stack
[stacki
];
6025 case DW_OP_plus_uconst
:
6026 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
6031 stack
[stacki
- 1] -= stack
[stacki
];
6037 /* If we're not the last op, then we definitely can't encode
6038 this using GDB's address_class enum. */
6040 complain (&dwarf2_complex_location_expr
);
6044 complain (&dwarf2_unsupported_stack_op
, dwarf_stack_op_name (op
));
6045 return (stack
[stacki
]);
6048 return (stack
[stacki
]);
6051 /* memory allocation interface */
6055 dwarf2_free_tmp_obstack (PTR ignore
)
6057 obstack_free (&dwarf2_tmp_obstack
, NULL
);
6060 static struct dwarf_block
*
6061 dwarf_alloc_block (void)
6063 struct dwarf_block
*blk
;
6065 blk
= (struct dwarf_block
*)
6066 obstack_alloc (&dwarf2_tmp_obstack
, sizeof (struct dwarf_block
));
6070 static struct abbrev_info
*
6071 dwarf_alloc_abbrev (void)
6073 struct abbrev_info
*abbrev
;
6075 abbrev
= (struct abbrev_info
*) xmalloc (sizeof (struct abbrev_info
));
6076 memset (abbrev
, 0, sizeof (struct abbrev_info
));
6080 static struct die_info
*
6081 dwarf_alloc_die (void)
6083 struct die_info
*die
;
6085 die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
6086 memset (die
, 0, sizeof (struct die_info
));