1 /* DWARF 2 debugging format support for GDB.
2 Copyright 1994, 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
5 Inc. with support from Florida State University (under contract
6 with the Ada Joint Program Office), and Silicon Graphics, Inc.
7 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
8 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
11 This file is part of GDB.
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or (at
16 your option) any later version.
18 This program is distributed in the hope that it will be useful, but
19 WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
34 #include "elf/dwarf2.h"
37 #include "expression.h"
39 #include "complaints.h"
42 #include "gdb_string.h"
43 #include <sys/types.h>
45 /* .debug_info header for a compilation unit
46 Because of alignment constraints, this structure has padding and cannot
47 be mapped directly onto the beginning of the .debug_info section. */
48 typedef struct comp_unit_header
50 unsigned int length; /* length of the .debug_info
52 unsigned short version; /* version number -- 2 for DWARF
54 unsigned int abbrev_offset; /* offset into .debug_abbrev section */
55 unsigned char addr_size; /* byte size of an address -- 4 */
58 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
60 /* .debug_pubnames header
61 Because of alignment constraints, this structure has padding and cannot
62 be mapped directly onto the beginning of the .debug_info section. */
63 typedef struct pubnames_header
65 unsigned int length; /* length of the .debug_pubnames
67 unsigned char version; /* version number -- 2 for DWARF
69 unsigned int info_offset; /* offset into .debug_info section */
70 unsigned int info_size; /* byte size of .debug_info section
74 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
76 /* .debug_pubnames header
77 Because of alignment constraints, this structure has padding and cannot
78 be mapped directly onto the beginning of the .debug_info section. */
79 typedef struct aranges_header
81 unsigned int length; /* byte len of the .debug_aranges
83 unsigned short version; /* version number -- 2 for DWARF
85 unsigned int info_offset; /* offset into .debug_info section */
86 unsigned char addr_size; /* byte size of an address */
87 unsigned char seg_size; /* byte size of segment descriptor */
90 #define _ACTUAL_ARANGES_HEADER_SIZE 12
92 /* .debug_line statement program prologue
93 Because of alignment constraints, this structure has padding and cannot
94 be mapped directly onto the beginning of the .debug_info section. */
95 typedef struct statement_prologue
97 unsigned int total_length; /* byte length of the statement
99 unsigned short version; /* version number -- 2 for DWARF
101 unsigned int prologue_length; /* # bytes between prologue &
103 unsigned char minimum_instruction_length; /* byte size of
105 unsigned char default_is_stmt; /* initial value of is_stmt
108 unsigned char line_range;
109 unsigned char opcode_base; /* number assigned to first special
111 unsigned char *standard_opcode_lengths;
115 /* offsets and sizes of debugging sections */
117 static file_ptr dwarf_info_offset;
118 static file_ptr dwarf_abbrev_offset;
119 static file_ptr dwarf_line_offset;
120 static file_ptr dwarf_pubnames_offset;
121 static file_ptr dwarf_aranges_offset;
122 static file_ptr dwarf_loc_offset;
123 static file_ptr dwarf_macinfo_offset;
124 static file_ptr dwarf_str_offset;
126 static unsigned int dwarf_info_size;
127 static unsigned int dwarf_abbrev_size;
128 static unsigned int dwarf_line_size;
129 static unsigned int dwarf_pubnames_size;
130 static unsigned int dwarf_aranges_size;
131 static unsigned int dwarf_loc_size;
132 static unsigned int dwarf_macinfo_size;
133 static unsigned int dwarf_str_size;
135 /* names of the debugging sections */
137 #define INFO_SECTION ".debug_info"
138 #define ABBREV_SECTION ".debug_abbrev"
139 #define LINE_SECTION ".debug_line"
140 #define PUBNAMES_SECTION ".debug_pubnames"
141 #define ARANGES_SECTION ".debug_aranges"
142 #define LOC_SECTION ".debug_loc"
143 #define MACINFO_SECTION ".debug_macinfo"
144 #define STR_SECTION ".debug_str"
146 /* local data types */
148 /* The data in a compilation unit header looks like this. */
149 struct comp_unit_head
153 unsigned int abbrev_offset;
154 unsigned char addr_size;
157 /* The data in the .debug_line statement prologue looks like this. */
160 unsigned int total_length;
161 unsigned short version;
162 unsigned int prologue_length;
163 unsigned char minimum_instruction_length;
164 unsigned char default_is_stmt;
166 unsigned char line_range;
167 unsigned char opcode_base;
168 unsigned char *standard_opcode_lengths;
171 /* When we construct a partial symbol table entry we only
172 need this much information. */
173 struct partial_die_info
176 unsigned char has_children;
177 unsigned char is_external;
178 unsigned char is_declaration;
179 unsigned char has_type;
185 struct dwarf_block *locdesc;
186 unsigned int language;
190 /* This data structure holds the information of an abbrev. */
193 unsigned int number; /* number identifying abbrev */
194 enum dwarf_tag tag; /* dwarf tag */
195 int has_children; /* boolean */
196 unsigned int num_attrs; /* number of attributes */
197 struct attr_abbrev *attrs; /* an array of attribute descriptions */
198 struct abbrev_info *next; /* next in chain */
203 enum dwarf_attribute name;
204 enum dwarf_form form;
207 /* This data structure holds a complete die structure. */
210 enum dwarf_tag tag; /* Tag indicating type of die */
211 unsigned short has_children; /* Does the die have children */
212 unsigned int abbrev; /* Abbrev number */
213 unsigned int offset; /* Offset in .debug_info section */
214 unsigned int num_attrs; /* Number of attributes */
215 struct attribute *attrs; /* An array of attributes */
216 struct die_info *next_ref; /* Next die in ref hash table */
217 struct die_info *next; /* Next die in linked list */
218 struct type *type; /* Cached type information */
221 /* Attributes have a name and a value */
224 enum dwarf_attribute name;
225 enum dwarf_form form;
229 struct dwarf_block *blk;
237 /* Get at parts of an attribute structure */
239 #define DW_STRING(attr) ((attr)->u.str)
240 #define DW_UNSND(attr) ((attr)->u.unsnd)
241 #define DW_BLOCK(attr) ((attr)->u.blk)
242 #define DW_SND(attr) ((attr)->u.snd)
243 #define DW_ADDR(attr) ((attr)->u.addr)
245 /* Blocks are a bunch of untyped bytes. */
252 /* We only hold one compilation unit's abbrevs in
253 memory at any one time. */
254 #ifndef ABBREV_HASH_SIZE
255 #define ABBREV_HASH_SIZE 121
257 #ifndef ATTR_ALLOC_CHUNK
258 #define ATTR_ALLOC_CHUNK 4
261 static struct abbrev_info *dwarf2_abbrevs[ABBREV_HASH_SIZE];
263 /* A hash table of die offsets for following references. */
264 #ifndef REF_HASH_SIZE
265 #define REF_HASH_SIZE 1021
268 static struct die_info *die_ref_table[REF_HASH_SIZE];
270 /* Obstack for allocating temporary storage used during symbol reading. */
271 static struct obstack dwarf2_tmp_obstack;
273 /* Offset to the first byte of the current compilation unit header,
274 for resolving relative reference dies. */
275 static unsigned int cu_header_offset;
277 /* Allocate fields for structs, unions and enums in this size. */
278 #ifndef DW_FIELD_ALLOC_CHUNK
279 #define DW_FIELD_ALLOC_CHUNK 4
282 /* The language we are debugging. */
283 static enum language cu_language;
284 static const struct language_defn *cu_language_defn;
286 /* Actually data from the sections. */
287 static char *dwarf_info_buffer;
288 static char *dwarf_abbrev_buffer;
289 static char *dwarf_line_buffer;
291 /* A zeroed version of a partial die for initialization purposes. */
292 static struct partial_die_info zeroed_partial_die;
294 /* The generic symbol table building routines have separate lists for
295 file scope symbols and all all other scopes (local scopes). So
296 we need to select the right one to pass to add_symbol_to_list().
297 We do it by keeping a pointer to the correct list in list_in_scope.
299 FIXME: The original dwarf code just treated the file scope as the first
300 local scope, and all other local scopes as nested local scopes, and worked
301 fine. Check to see if we really need to distinguish these
303 static struct pending **list_in_scope = &file_symbols;
305 /* FIXME: The following variables pass additional information from
306 decode_locdesc to the caller. */
307 static int optimized_out; /* Kludge to identify optimized out variables */
308 static int isreg; /* Kludge to identify register variables */
309 static int offreg; /* Kludge to identify basereg references */
310 static int basereg; /* Which base register is it relative to? */
311 static int islocal; /* Kludge to identify local variables */
313 /* DW_AT_frame_base values for the current function.
314 frame_base_reg is -1 if DW_AT_frame_base is missing, otherwise it
315 contains the register number for the frame register.
316 frame_base_offset is the offset from the frame register to the
317 virtual stack frame. */
318 static int frame_base_reg;
319 static CORE_ADDR frame_base_offset;
321 /* This value is added to each symbol value. FIXME: Generalize to
322 the section_offsets structure used by dbxread (once this is done,
323 pass the appropriate section number to end_symtab). */
324 static CORE_ADDR baseaddr; /* Add to each symbol value */
326 /* We put a pointer to this structure in the read_symtab_private field
328 The complete dwarf information for an objfile is kept in the
329 psymbol_obstack, so that absolute die references can be handled.
330 Most of the information in this structure is related to an entire
331 object file and could be passed via the sym_private field of the objfile.
332 It is however conceivable that dwarf2 might not be the only type
333 of symbols read from an object file. */
337 /* Pointer to start of dwarf info buffer for the objfile. */
339 char *dwarf_info_buffer;
341 /* Offset in dwarf_info_buffer for this compilation unit. */
343 unsigned long dwarf_info_offset;
345 /* Pointer to start of dwarf abbreviation buffer for the objfile. */
347 char *dwarf_abbrev_buffer;
349 /* Size of dwarf abbreviation section for the objfile. */
351 unsigned int dwarf_abbrev_size;
353 /* Pointer to start of dwarf line buffer for the objfile. */
355 char *dwarf_line_buffer;
358 #define PST_PRIVATE(p) ((struct dwarf2_pinfo *)(p)->read_symtab_private)
359 #define DWARF_INFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_info_buffer)
360 #define DWARF_INFO_OFFSET(p) (PST_PRIVATE(p)->dwarf_info_offset)
361 #define DWARF_ABBREV_BUFFER(p) (PST_PRIVATE(p)->dwarf_abbrev_buffer)
362 #define DWARF_ABBREV_SIZE(p) (PST_PRIVATE(p)->dwarf_abbrev_size)
363 #define DWARF_LINE_BUFFER(p) (PST_PRIVATE(p)->dwarf_line_buffer)
365 /* Maintain an array of referenced fundamental types for the current
366 compilation unit being read. For DWARF version 1, we have to construct
367 the fundamental types on the fly, since no information about the
368 fundamental types is supplied. Each such fundamental type is created by
369 calling a language dependent routine to create the type, and then a
370 pointer to that type is then placed in the array at the index specified
371 by it's FT_<TYPENAME> value. The array has a fixed size set by the
372 FT_NUM_MEMBERS compile time constant, which is the number of predefined
373 fundamental types gdb knows how to construct. */
374 static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */
376 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
377 but this would require a corresponding change in unpack_field_as_long
379 static int bits_per_byte = 8;
381 /* The routines that read and process dies for a C struct or C++ class
382 pass lists of data member fields and lists of member function fields
383 in an instance of a field_info structure, as defined below. */
386 /* List of data member and baseclasses fields. */
389 struct nextfield *next;
395 /* Number of fields. */
398 /* Number of baseclasses. */
401 /* Set if the accesibility of one of the fields is not public. */
402 int non_public_fields;
404 /* Member function fields array, entries are allocated in the order they
405 are encountered in the object file. */
408 struct nextfnfield *next;
409 struct fn_field fnfield;
412 /* Member function fieldlist array, contains name of possibly overloaded
413 member function, number of overloaded member functions and a pointer
414 to the head of the member function field chain. */
419 struct nextfnfield *head;
422 /* Number of entries in the fnfieldlists array. */
426 /* FIXME: Kludge to mark a varargs function type for C++ member function
427 argument processing. */
428 #define TYPE_FLAG_VARARGS (1 << 10)
430 /* Dwarf2 has no clean way to discern C++ static and non-static member
431 functions. G++ helps GDB by marking the first parameter for non-static
432 member functions (which is the this pointer) as artificial.
433 We pass this information between dwarf2_add_member_fn and
434 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
435 #define TYPE_FIELD_ARTIFICIAL TYPE_FIELD_BITPOS
437 /* Various complaints about symbol reading that don't abort the process */
439 static struct complaint dwarf2_const_ignored =
441 "type qualifier 'const' ignored", 0, 0
443 static struct complaint dwarf2_volatile_ignored =
445 "type qualifier 'volatile' ignored", 0, 0
447 static struct complaint dwarf2_non_const_array_bound_ignored =
449 "non-constant array bounds form '%s' ignored", 0, 0
451 static struct complaint dwarf2_missing_line_number_section =
453 "missing .debug_line section", 0, 0
455 static struct complaint dwarf2_mangled_line_number_section =
457 "mangled .debug_line section", 0, 0
459 static struct complaint dwarf2_unsupported_die_ref_attr =
461 "unsupported die ref attribute form: '%s'", 0, 0
463 static struct complaint dwarf2_unsupported_stack_op =
465 "unsupported stack op: '%s'", 0, 0
467 static struct complaint dwarf2_unsupported_tag =
469 "unsupported tag: '%s'", 0, 0
471 static struct complaint dwarf2_unsupported_at_encoding =
473 "unsupported DW_AT_encoding: '%s'", 0, 0
475 static struct complaint dwarf2_unsupported_at_frame_base =
477 "unsupported DW_AT_frame_base for function '%s'", 0, 0
479 static struct complaint dwarf2_unexpected_tag =
481 "unexepected tag in read_type_die: '%s'", 0, 0
483 static struct complaint dwarf2_missing_at_frame_base =
485 "DW_AT_frame_base missing for DW_OP_fbreg", 0, 0
487 static struct complaint dwarf2_bad_static_member_name =
489 "unrecognized static data member name '%s'", 0, 0
491 static struct complaint dwarf2_unsupported_accessibility =
493 "unsupported accessibility %d", 0, 0
495 static struct complaint dwarf2_bad_member_name_complaint =
497 "cannot extract member name from '%s'", 0, 0
499 static struct complaint dwarf2_missing_member_fn_type_complaint =
501 "member function type missing for '%s'", 0, 0
503 static struct complaint dwarf2_vtbl_not_found_complaint =
505 "virtual function table pointer not found when defining class '%s'", 0, 0
507 static struct complaint dwarf2_absolute_sibling_complaint =
509 "ignoring absolute DW_AT_sibling", 0, 0
511 static struct complaint dwarf2_const_value_length_mismatch =
513 "const value length mismatch for '%s', got %d, expected %d", 0, 0
515 static struct complaint dwarf2_unsupported_const_value_attr =
517 "unsupported const value attribute form: '%s'", 0, 0
520 /* Remember the addr_size read from the dwarf.
521 If a target expects to link compilation units with differing address
522 sizes, gdb needs to be sure that the appropriate size is here for
523 whatever scope is currently getting read. */
524 static int address_size;
526 /* Some elf32 object file formats while linked for a 32 bit address
527 space contain debug information that has assumed 64 bit
528 addresses. Eg 64 bit MIPS target produced by GCC/GAS/LD where the
529 symbol table contains 32bit address values while its .debug_info
530 section contains 64 bit address values.
531 ADDRESS_SIGNIFICANT_SIZE specifies the number significant bits in
532 the ADDRESS_SIZE bytes read from the file */
533 static int address_significant_size;
535 /* Externals references. */
536 extern int info_verbose; /* From main.c; nonzero => verbose */
538 /* local function prototypes */
540 static void dwarf2_locate_sections PARAMS ((bfd *, asection *, PTR));
543 static void dwarf2_build_psymtabs_easy PARAMS ((struct objfile *,
544 struct section_offsets *,
548 static void dwarf2_build_psymtabs_hard PARAMS ((struct objfile *,
549 struct section_offsets *,
552 static char *scan_partial_symbols PARAMS ((char *, struct objfile *,
553 CORE_ADDR *, CORE_ADDR *));
555 static void add_partial_symbol PARAMS ((struct partial_die_info *,
558 static void dwarf2_psymtab_to_symtab PARAMS ((struct partial_symtab *));
560 static void psymtab_to_symtab_1 PARAMS ((struct partial_symtab *));
562 static char *dwarf2_read_section PARAMS ((struct objfile *, file_ptr,
565 static void dwarf2_read_abbrevs PARAMS ((bfd *, unsigned int));
567 static void dwarf2_empty_abbrev_table PARAMS ((PTR));
569 static struct abbrev_info *dwarf2_lookup_abbrev PARAMS ((unsigned int));
571 static char *read_partial_die PARAMS ((struct partial_die_info *,
572 bfd *, char *, int *));
574 static char *read_full_die PARAMS ((struct die_info **, bfd *, char *));
576 static char *read_attribute PARAMS ((struct attribute *, struct attr_abbrev *,
579 static unsigned int read_1_byte PARAMS ((bfd *, char *));
581 static int read_1_signed_byte PARAMS ((bfd *, char *));
583 static unsigned int read_2_bytes PARAMS ((bfd *, char *));
585 static unsigned int read_4_bytes PARAMS ((bfd *, char *));
587 static unsigned int read_8_bytes PARAMS ((bfd *, char *));
589 static CORE_ADDR read_address PARAMS ((bfd *, char *));
591 static char *read_n_bytes PARAMS ((bfd *, char *, unsigned int));
593 static char *read_string PARAMS ((bfd *, char *, unsigned int *));
595 static unsigned int read_unsigned_leb128 PARAMS ((bfd *, char *,
598 static int read_signed_leb128 PARAMS ((bfd *, char *, unsigned int *));
600 static void set_cu_language PARAMS ((unsigned int));
602 static struct attribute *dwarf_attr PARAMS ((struct die_info *,
605 static void dwarf_decode_lines PARAMS ((unsigned int, char *, bfd *));
607 static void dwarf2_start_subfile PARAMS ((char *, char *));
609 static struct symbol *new_symbol PARAMS ((struct die_info *, struct type *,
612 static void dwarf2_const_value PARAMS ((struct attribute *, struct symbol *,
615 static struct type *die_type PARAMS ((struct die_info *, struct objfile *));
617 static struct type *die_containing_type PARAMS ((struct die_info *,
621 static struct type *type_at_offset PARAMS ((unsigned int, struct objfile *));
624 static struct type *tag_type_to_type PARAMS ((struct die_info *,
627 static void read_type_die PARAMS ((struct die_info *, struct objfile *));
629 static void read_typedef PARAMS ((struct die_info *, struct objfile *));
631 static void read_base_type PARAMS ((struct die_info *, struct objfile *));
633 static void read_file_scope PARAMS ((struct die_info *, struct objfile *));
635 static void read_func_scope PARAMS ((struct die_info *, struct objfile *));
637 static void read_lexical_block_scope PARAMS ((struct die_info *,
640 static int dwarf2_get_pc_bounds PARAMS ((struct die_info *,
641 CORE_ADDR *, CORE_ADDR *,
644 static void dwarf2_add_field PARAMS ((struct field_info *, struct die_info *,
647 static void dwarf2_attach_fields_to_type PARAMS ((struct field_info *,
651 static char *skip_member_fn_name PARAMS ((char *));
653 static void dwarf2_add_member_fn PARAMS ((struct field_info *,
654 struct die_info *, struct type *,
655 struct objfile *objfile));
657 static void dwarf2_attach_fn_fields_to_type PARAMS ((struct field_info *,
661 static void read_structure_scope PARAMS ((struct die_info *, struct objfile *));
663 static void read_common_block PARAMS ((struct die_info *, struct objfile *));
665 static void read_enumeration PARAMS ((struct die_info *, struct objfile *));
667 static struct type *dwarf_base_type PARAMS ((int, int, struct objfile *));
669 static CORE_ADDR decode_locdesc PARAMS ((struct dwarf_block *,
672 static void read_array_type PARAMS ((struct die_info *, struct objfile *));
674 static void read_tag_pointer_type PARAMS ((struct die_info *,
677 static void read_tag_ptr_to_member_type PARAMS ((struct die_info *,
680 static void read_tag_reference_type PARAMS ((struct die_info *,
683 static void read_tag_const_type PARAMS ((struct die_info *, struct objfile *));
685 static void read_tag_volatile_type PARAMS ((struct die_info *,
688 static void read_tag_string_type PARAMS ((struct die_info *,
691 static void read_subroutine_type PARAMS ((struct die_info *,
694 struct die_info *read_comp_unit PARAMS ((char *, bfd *));
696 static void free_die_list PARAMS ((struct die_info *));
698 static void process_die PARAMS ((struct die_info *, struct objfile *));
700 static char *dwarf2_linkage_name PARAMS ((struct die_info *));
702 static char *dwarf_tag_name PARAMS ((unsigned int));
704 static char *dwarf_attr_name PARAMS ((unsigned int));
706 static char *dwarf_form_name PARAMS ((unsigned int));
708 static char *dwarf_stack_op_name PARAMS ((unsigned int));
710 static char *dwarf_bool_name PARAMS ((unsigned int));
712 static char *dwarf_type_encoding_name PARAMS ((unsigned int));
715 static char *dwarf_cfi_name PARAMS ((unsigned int));
717 struct die_info *copy_die PARAMS ((struct die_info *));
720 struct die_info *sibling_die PARAMS ((struct die_info *));
722 void dump_die PARAMS ((struct die_info *));
724 void dump_die_list PARAMS ((struct die_info *));
726 void store_in_ref_table PARAMS ((unsigned int, struct die_info *));
728 static void dwarf2_empty_die_ref_table PARAMS ((void));
730 static unsigned int dwarf2_get_ref_die_offset PARAMS ((struct attribute *));
732 struct die_info *follow_die_ref PARAMS ((unsigned int));
734 static struct type *dwarf2_fundamental_type PARAMS ((struct objfile *, int));
736 /* memory allocation interface */
738 static void dwarf2_free_tmp_obstack PARAMS ((PTR));
740 static struct dwarf_block *dwarf_alloc_block PARAMS ((void));
742 static struct abbrev_info *dwarf_alloc_abbrev PARAMS ((void));
744 static struct die_info *dwarf_alloc_die PARAMS ((void));
746 /* Try to locate the sections we need for DWARF 2 debugging
747 information and return true if we have enough to do something. */
750 dwarf2_has_info (abfd)
753 dwarf_info_offset = dwarf_abbrev_offset = dwarf_line_offset = 0;
754 bfd_map_over_sections (abfd, dwarf2_locate_sections, NULL);
755 if (dwarf_info_offset && dwarf_abbrev_offset)
765 /* This function is mapped across the sections and remembers the
766 offset and size of each of the debugging sections we are interested
770 dwarf2_locate_sections (ignore_abfd, sectp, ignore_ptr)
775 if (STREQ (sectp->name, INFO_SECTION))
777 dwarf_info_offset = sectp->filepos;
778 dwarf_info_size = bfd_get_section_size_before_reloc (sectp);
780 else if (STREQ (sectp->name, ABBREV_SECTION))
782 dwarf_abbrev_offset = sectp->filepos;
783 dwarf_abbrev_size = bfd_get_section_size_before_reloc (sectp);
785 else if (STREQ (sectp->name, LINE_SECTION))
787 dwarf_line_offset = sectp->filepos;
788 dwarf_line_size = bfd_get_section_size_before_reloc (sectp);
790 else if (STREQ (sectp->name, PUBNAMES_SECTION))
792 dwarf_pubnames_offset = sectp->filepos;
793 dwarf_pubnames_size = bfd_get_section_size_before_reloc (sectp);
795 else if (STREQ (sectp->name, ARANGES_SECTION))
797 dwarf_aranges_offset = sectp->filepos;
798 dwarf_aranges_size = bfd_get_section_size_before_reloc (sectp);
800 else if (STREQ (sectp->name, LOC_SECTION))
802 dwarf_loc_offset = sectp->filepos;
803 dwarf_loc_size = bfd_get_section_size_before_reloc (sectp);
805 else if (STREQ (sectp->name, MACINFO_SECTION))
807 dwarf_macinfo_offset = sectp->filepos;
808 dwarf_macinfo_size = bfd_get_section_size_before_reloc (sectp);
810 else if (STREQ (sectp->name, STR_SECTION))
812 dwarf_str_offset = sectp->filepos;
813 dwarf_str_size = bfd_get_section_size_before_reloc (sectp);
817 /* Build a partial symbol table. */
820 dwarf2_build_psymtabs (objfile, section_offsets, mainline)
821 struct objfile *objfile;
822 struct section_offsets *section_offsets;
826 /* We definitely need the .debug_info and .debug_abbrev sections */
828 dwarf_info_buffer = dwarf2_read_section (objfile,
831 dwarf_abbrev_buffer = dwarf2_read_section (objfile,
834 dwarf_line_buffer = dwarf2_read_section (objfile,
838 if (mainline || objfile->global_psymbols.size == 0 ||
839 objfile->static_psymbols.size == 0)
841 init_psymbol_list (objfile, 1024);
845 if (dwarf_aranges_offset && dwarf_pubnames_offset)
847 /* Things are significanlty easier if we have .debug_aranges and
848 .debug_pubnames sections */
850 dwarf2_build_psymtabs_easy (objfile, section_offsets, mainline);
854 /* only test this case for now */
856 /* In this case we have to work a bit harder */
857 dwarf2_build_psymtabs_hard (objfile, section_offsets, mainline);
862 /* Build the partial symbol table from the information in the
863 .debug_pubnames and .debug_aranges sections. */
866 dwarf2_build_psymtabs_easy (objfile, section_offsets, mainline)
867 struct objfile *objfile;
868 struct section_offsets *section_offsets;
871 bfd *abfd = objfile->obfd;
872 char *aranges_buffer, *pubnames_buffer;
873 char *aranges_ptr, *pubnames_ptr;
874 unsigned int entry_length, version, info_offset, info_size;
876 pubnames_buffer = dwarf2_read_section (objfile,
877 dwarf_pubnames_offset,
878 dwarf_pubnames_size);
879 pubnames_ptr = pubnames_buffer;
880 while ((pubnames_ptr - pubnames_buffer) < dwarf_pubnames_size)
882 entry_length = read_4_bytes (abfd, pubnames_ptr);
884 version = read_1_byte (abfd, pubnames_ptr);
886 info_offset = read_4_bytes (abfd, pubnames_ptr);
888 info_size = read_4_bytes (abfd, pubnames_ptr);
892 aranges_buffer = dwarf2_read_section (objfile,
893 dwarf_aranges_offset,
899 /* Build the partial symbol table by doing a quick pass through the
900 .debug_info and .debug_abbrev sections. */
903 dwarf2_build_psymtabs_hard (objfile, section_offsets, mainline)
904 struct objfile *objfile;
905 struct section_offsets *section_offsets;
908 /* Instead of reading this into a big buffer, we should probably use
909 mmap() on architectures that support it. (FIXME) */
910 bfd *abfd = objfile->obfd;
911 char *info_ptr, *abbrev_ptr;
912 char *beg_of_comp_unit;
913 struct comp_unit_head cu_header;
914 struct partial_die_info comp_unit_die;
915 struct partial_symtab *pst;
916 struct cleanup *back_to;
917 int comp_unit_has_pc_info;
918 CORE_ADDR lowpc, highpc;
920 /* Number of bytes of any addresses that are signficant */
921 address_significant_size = get_elf_backend_data (abfd)->s->arch_size / 8;
923 info_ptr = dwarf_info_buffer;
924 abbrev_ptr = dwarf_abbrev_buffer;
926 obstack_init (&dwarf2_tmp_obstack);
927 back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL);
929 while ((unsigned int) (info_ptr - dwarf_info_buffer)
930 + ((info_ptr - dwarf_info_buffer) % 4) < dwarf_info_size)
932 beg_of_comp_unit = info_ptr;
933 cu_header.length = read_4_bytes (abfd, info_ptr);
935 cu_header.version = read_2_bytes (abfd, info_ptr);
937 cu_header.abbrev_offset = read_4_bytes (abfd, info_ptr);
939 cu_header.addr_size = read_1_byte (abfd, info_ptr);
941 address_size = cu_header.addr_size;
943 if (cu_header.version != 2)
945 error ("Dwarf Error: wrong version in compilation unit header.");
948 if (cu_header.abbrev_offset >= dwarf_abbrev_size)
950 error ("Dwarf Error: bad offset (0x%lx) in compilation unit header (offset 0x%lx + 6).",
951 (long) cu_header.abbrev_offset,
952 (long) (beg_of_comp_unit - dwarf_info_buffer));
955 if (beg_of_comp_unit + cu_header.length + 4
956 > dwarf_info_buffer + dwarf_info_size)
958 error ("Dwarf Error: bad length (0x%lx) in compilation unit header (offset 0x%lx + 0).",
959 (long) cu_header.length,
960 (long) (beg_of_comp_unit - dwarf_info_buffer));
963 if (address_size < address_significant_size)
965 error ("Dwarf Error: bad address size (%ld) in compilation unit header (offset 0x%lx + 11).",
966 (long) cu_header.addr_size,
967 (long) (beg_of_comp_unit - dwarf_info_buffer));
970 /* Read the abbrevs for this compilation unit into a table */
971 dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset);
972 make_cleanup (dwarf2_empty_abbrev_table, NULL);
974 /* Read the compilation unit die */
975 info_ptr = read_partial_die (&comp_unit_die, abfd,
976 info_ptr, &comp_unit_has_pc_info);
978 /* Set the language we're debugging */
979 set_cu_language (comp_unit_die.language);
981 /* Allocate a new partial symbol table structure */
982 pst = start_psymtab_common (objfile, section_offsets,
983 comp_unit_die.name ? comp_unit_die.name : "",
985 objfile->global_psymbols.next,
986 objfile->static_psymbols.next);
988 pst->read_symtab_private = (char *)
989 obstack_alloc (&objfile->psymbol_obstack, sizeof (struct dwarf2_pinfo));
990 cu_header_offset = beg_of_comp_unit - dwarf_info_buffer;
991 DWARF_INFO_BUFFER(pst) = dwarf_info_buffer;
992 DWARF_INFO_OFFSET(pst) = beg_of_comp_unit - dwarf_info_buffer;
993 DWARF_ABBREV_BUFFER(pst) = dwarf_abbrev_buffer;
994 DWARF_ABBREV_SIZE(pst) = dwarf_abbrev_size;
995 DWARF_LINE_BUFFER(pst) = dwarf_line_buffer;
996 baseaddr = ANOFFSET (section_offsets, 0);
998 /* Store the function that reads in the rest of the symbol table */
999 pst->read_symtab = dwarf2_psymtab_to_symtab;
1001 /* Check if comp unit has_children.
1002 If so, read the rest of the partial symbols from this comp unit.
1003 If not, there's no more debug_info for this comp unit. */
1004 if (comp_unit_die.has_children)
1006 info_ptr = scan_partial_symbols (info_ptr, objfile, &lowpc, &highpc);
1008 /* If the compilation unit didn't have an explicit address range,
1009 then use the information extracted from its child dies. */
1010 if (!comp_unit_has_pc_info)
1012 comp_unit_die.lowpc = lowpc;
1013 comp_unit_die.highpc = highpc;
1016 pst->textlow = comp_unit_die.lowpc + baseaddr;
1017 pst->texthigh = comp_unit_die.highpc + baseaddr;
1019 pst->n_global_syms = objfile->global_psymbols.next -
1020 (objfile->global_psymbols.list + pst->globals_offset);
1021 pst->n_static_syms = objfile->static_psymbols.next -
1022 (objfile->static_psymbols.list + pst->statics_offset);
1023 sort_pst_symbols (pst);
1025 /* If there is already a psymtab or symtab for a file of this
1026 name, remove it. (If there is a symtab, more drastic things
1027 also happen.) This happens in VxWorks. */
1028 free_named_symtabs (pst->filename);
1030 info_ptr = beg_of_comp_unit + cu_header.length + 4;
1032 do_cleanups (back_to);
1035 /* Read in all interesting dies to the end of the compilation unit. */
1038 scan_partial_symbols (info_ptr, objfile, lowpc, highpc)
1040 struct objfile *objfile;
1044 bfd *abfd = objfile->obfd;
1045 struct partial_die_info pdi;
1047 /* This function is called after we've read in the comp_unit_die in
1048 order to read its children. We start the nesting level at 1 since
1049 we have pushed 1 level down in order to read the comp unit's children.
1050 The comp unit itself is at level 0, so we stop reading when we pop
1051 back to that level. */
1053 int nesting_level = 1;
1056 *lowpc = ((CORE_ADDR) -1);
1057 *highpc = ((CORE_ADDR) 0);
1059 while (nesting_level)
1061 info_ptr = read_partial_die (&pdi, abfd, info_ptr, &has_pc_info);
1067 case DW_TAG_subprogram:
1070 if (pdi.lowpc < *lowpc)
1074 if (pdi.highpc > *highpc)
1076 *highpc = pdi.highpc;
1078 if ((pdi.is_external || nesting_level == 1)
1079 && !pdi.is_declaration)
1081 add_partial_symbol (&pdi, objfile);
1085 case DW_TAG_variable:
1086 case DW_TAG_typedef:
1087 case DW_TAG_class_type:
1088 case DW_TAG_structure_type:
1089 case DW_TAG_union_type:
1090 case DW_TAG_enumeration_type:
1091 if ((pdi.is_external || nesting_level == 1)
1092 && !pdi.is_declaration)
1094 add_partial_symbol (&pdi, objfile);
1097 case DW_TAG_enumerator:
1098 /* File scope enumerators are added to the partial symbol
1100 if (nesting_level == 2)
1101 add_partial_symbol (&pdi, objfile);
1103 case DW_TAG_base_type:
1104 /* File scope base type definitions are added to the partial
1106 if (nesting_level == 1)
1107 add_partial_symbol (&pdi, objfile);
1114 /* If the die has a sibling, skip to the sibling.
1115 Do not skip enumeration types, we want to record their
1117 if (pdi.sibling && pdi.tag != DW_TAG_enumeration_type)
1119 info_ptr = pdi.sibling;
1121 else if (pdi.has_children)
1123 /* Die has children, but the optional DW_AT_sibling attribute
1134 /* If we didn't find a lowpc, set it to highpc to avoid complaints
1135 from `maint check'. */
1136 if (*lowpc == ((CORE_ADDR) -1))
1142 add_partial_symbol (pdi, objfile)
1143 struct partial_die_info *pdi;
1144 struct objfile *objfile;
1150 case DW_TAG_subprogram:
1151 if (pdi->is_external)
1153 /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
1154 mst_text, objfile);*/
1155 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1156 VAR_NAMESPACE, LOC_BLOCK,
1157 &objfile->global_psymbols,
1158 0, pdi->lowpc + baseaddr, cu_language, objfile);
1162 /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
1163 mst_file_text, objfile);*/
1164 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1165 VAR_NAMESPACE, LOC_BLOCK,
1166 &objfile->static_psymbols,
1167 0, pdi->lowpc + baseaddr, cu_language, objfile);
1170 case DW_TAG_variable:
1171 if (pdi->is_external)
1174 Don't enter into the minimal symbol tables as there is
1175 a minimal symbol table entry from the ELF symbols already.
1176 Enter into partial symbol table if it has a location
1177 descriptor or a type.
1178 If the location descriptor is missing, new_symbol will create
1179 a LOC_UNRESOLVED symbol, the address of the variable will then
1180 be determined from the minimal symbol table whenever the variable
1182 The address for the partial symbol table entry is not
1183 used by GDB, but it comes in handy for debugging partial symbol
1187 addr = decode_locdesc (pdi->locdesc, objfile);
1188 if (pdi->locdesc || pdi->has_type)
1189 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1190 VAR_NAMESPACE, LOC_STATIC,
1191 &objfile->global_psymbols,
1192 0, addr + baseaddr, cu_language, objfile);
1196 /* Static Variable. Skip symbols without location descriptors. */
1197 if (pdi->locdesc == NULL)
1199 addr = decode_locdesc (pdi->locdesc, objfile);
1200 /*prim_record_minimal_symbol (pdi->name, addr + baseaddr,
1201 mst_file_data, objfile);*/
1202 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1203 VAR_NAMESPACE, LOC_STATIC,
1204 &objfile->static_psymbols,
1205 0, addr + baseaddr, cu_language, objfile);
1208 case DW_TAG_typedef:
1209 case DW_TAG_base_type:
1210 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1211 VAR_NAMESPACE, LOC_TYPEDEF,
1212 &objfile->static_psymbols,
1213 0, (CORE_ADDR) 0, cu_language, objfile);
1215 case DW_TAG_class_type:
1216 case DW_TAG_structure_type:
1217 case DW_TAG_union_type:
1218 case DW_TAG_enumeration_type:
1219 /* Skip aggregate types without children, these are external
1221 if (pdi->has_children == 0)
1223 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1224 STRUCT_NAMESPACE, LOC_TYPEDEF,
1225 &objfile->static_psymbols,
1226 0, (CORE_ADDR) 0, cu_language, objfile);
1228 if (cu_language == language_cplus)
1230 /* For C++, these implicitly act as typedefs as well. */
1231 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1232 VAR_NAMESPACE, LOC_TYPEDEF,
1233 &objfile->static_psymbols,
1234 0, (CORE_ADDR) 0, cu_language, objfile);
1237 case DW_TAG_enumerator:
1238 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1239 VAR_NAMESPACE, LOC_CONST,
1240 &objfile->static_psymbols,
1241 0, (CORE_ADDR) 0, cu_language, objfile);
1248 /* Expand this partial symbol table into a full symbol table. */
1251 dwarf2_psymtab_to_symtab (pst)
1252 struct partial_symtab *pst;
1254 /* FIXME: This is barely more than a stub. */
1259 warning ("bug: psymtab for %s is already read in.", pst->filename);
1265 printf_filtered ("Reading in symbols for %s...", pst->filename);
1266 gdb_flush (gdb_stdout);
1269 psymtab_to_symtab_1 (pst);
1271 /* Finish up the debug error message. */
1273 printf_filtered ("done.\n");
1279 psymtab_to_symtab_1 (pst)
1280 struct partial_symtab *pst;
1282 struct objfile *objfile = pst->objfile;
1283 bfd *abfd = objfile->obfd;
1284 struct comp_unit_head cu_header;
1285 struct die_info *dies;
1286 unsigned long offset;
1287 CORE_ADDR lowpc, highpc;
1288 struct die_info *child_die;
1290 struct symtab *symtab;
1291 struct cleanup *back_to;
1293 /* Set local variables from the partial symbol table info. */
1294 offset = DWARF_INFO_OFFSET(pst);
1295 dwarf_info_buffer = DWARF_INFO_BUFFER(pst);
1296 dwarf_abbrev_buffer = DWARF_ABBREV_BUFFER(pst);
1297 dwarf_abbrev_size = DWARF_ABBREV_SIZE(pst);
1298 dwarf_line_buffer = DWARF_LINE_BUFFER(pst);
1299 baseaddr = ANOFFSET (pst->section_offsets, 0);
1300 cu_header_offset = offset;
1301 info_ptr = dwarf_info_buffer + offset;
1303 obstack_init (&dwarf2_tmp_obstack);
1304 back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL);
1307 make_cleanup (really_free_pendings, NULL);
1309 /* read in the comp_unit header */
1310 cu_header.length = read_4_bytes (abfd, info_ptr);
1312 cu_header.version = read_2_bytes (abfd, info_ptr);
1314 cu_header.abbrev_offset = read_4_bytes (abfd, info_ptr);
1316 cu_header.addr_size = read_1_byte (abfd, info_ptr);
1319 /* Read the abbrevs for this compilation unit */
1320 dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset);
1321 make_cleanup (dwarf2_empty_abbrev_table, NULL);
1323 dies = read_comp_unit (info_ptr, abfd);
1325 make_cleanup (free_die_list, dies);
1327 /* Do line number decoding in read_file_scope () */
1328 process_die (dies, objfile);
1330 if (!dwarf2_get_pc_bounds (dies, &lowpc, &highpc, objfile))
1332 /* Some compilers don't define a DW_AT_high_pc attribute for
1333 the compilation unit. If the DW_AT_high_pc is missing,
1334 synthesize it, by scanning the DIE's below the compilation unit. */
1336 if (dies->has_children)
1338 child_die = dies->next;
1339 while (child_die && child_die->tag)
1341 if (child_die->tag == DW_TAG_subprogram)
1343 CORE_ADDR low, high;
1345 if (dwarf2_get_pc_bounds (child_die, &low, &high, objfile))
1347 highpc = max (highpc, high);
1350 child_die = sibling_die (child_die);
1354 symtab = end_symtab (highpc + baseaddr, objfile, 0);
1356 /* Set symtab language to language from DW_AT_language.
1357 If the compilation is from a C file generated by language preprocessors,
1358 do not set the language if it was already deduced by start_subfile. */
1360 && !(cu_language == language_c && symtab->language != language_c))
1362 symtab->language = cu_language;
1364 pst->symtab = symtab;
1366 sort_symtab_syms (pst->symtab);
1368 do_cleanups (back_to);
1371 /* Process a die and its children. */
1374 process_die (die, objfile)
1375 struct die_info *die;
1376 struct objfile *objfile;
1380 case DW_TAG_padding:
1382 case DW_TAG_compile_unit:
1383 read_file_scope (die, objfile);
1385 case DW_TAG_subprogram:
1386 read_subroutine_type (die, objfile);
1387 read_func_scope (die, objfile);
1389 case DW_TAG_inlined_subroutine:
1390 /* FIXME: These are ignored for now.
1391 They could be used to set breakpoints on all inlined instances
1392 of a function and make GDB `next' properly over inlined functions. */
1394 case DW_TAG_lexical_block:
1395 read_lexical_block_scope (die, objfile);
1397 case DW_TAG_class_type:
1398 case DW_TAG_structure_type:
1399 case DW_TAG_union_type:
1400 read_structure_scope (die, objfile);
1402 case DW_TAG_enumeration_type:
1403 read_enumeration (die, objfile);
1405 case DW_TAG_subroutine_type:
1406 read_subroutine_type (die, objfile);
1408 case DW_TAG_array_type:
1409 read_array_type (die, objfile);
1411 case DW_TAG_pointer_type:
1412 read_tag_pointer_type (die, objfile);
1414 case DW_TAG_ptr_to_member_type:
1415 read_tag_ptr_to_member_type (die, objfile);
1417 case DW_TAG_reference_type:
1418 read_tag_reference_type (die, objfile);
1420 case DW_TAG_string_type:
1421 read_tag_string_type (die, objfile);
1423 case DW_TAG_base_type:
1424 read_base_type (die, objfile);
1425 if (dwarf_attr (die, DW_AT_name))
1427 /* Add a typedef symbol for the base type definition. */
1428 new_symbol (die, die->type, objfile);
1431 case DW_TAG_common_block:
1432 read_common_block (die, objfile);
1434 case DW_TAG_common_inclusion:
1437 new_symbol (die, NULL, objfile);
1443 read_file_scope (die, objfile)
1444 struct die_info *die;
1445 struct objfile *objfile;
1447 unsigned int line_offset = 0;
1448 CORE_ADDR lowpc = ((CORE_ADDR) -1);
1449 CORE_ADDR highpc = ((CORE_ADDR) 0);
1450 struct attribute *attr;
1451 char *name = "<unknown>";
1452 char *comp_dir = NULL;
1453 struct die_info *child_die;
1454 bfd *abfd = objfile->obfd;
1456 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile))
1458 if (die->has_children)
1460 child_die = die->next;
1461 while (child_die && child_die->tag)
1463 if (child_die->tag == DW_TAG_subprogram)
1465 CORE_ADDR low, high;
1467 if (dwarf2_get_pc_bounds (child_die, &low, &high, objfile))
1469 lowpc = min (lowpc, low);
1470 highpc = max (highpc, high);
1473 child_die = sibling_die (child_die);
1478 /* If we didn't find a lowpc, set it to highpc to avoid complaints
1479 from finish_block. */
1480 if (lowpc == ((CORE_ADDR) -1))
1485 attr = dwarf_attr (die, DW_AT_name);
1488 name = DW_STRING (attr);
1490 attr = dwarf_attr (die, DW_AT_comp_dir);
1493 comp_dir = DW_STRING (attr);
1496 /* Irix 6.2 native cc prepends <machine>.: to the compilation
1497 directory, get rid of it. */
1498 char *cp = strchr (comp_dir, ':');
1500 if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
1505 if (objfile->ei.entry_point >= lowpc &&
1506 objfile->ei.entry_point < highpc)
1508 objfile->ei.entry_file_lowpc = lowpc;
1509 objfile->ei.entry_file_highpc = highpc;
1512 attr = dwarf_attr (die, DW_AT_language);
1515 set_cu_language (DW_UNSND (attr));
1518 /* We assume that we're processing GCC output. */
1519 processing_gcc_compilation = 2;
1521 /* FIXME:Do something here. */
1522 if (dip->at_producer != NULL)
1524 handle_producer (dip->at_producer);
1528 /* The compilation unit may be in a different language or objfile,
1529 zero out all remembered fundamental types. */
1530 memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *));
1532 start_symtab (name, comp_dir, lowpc);
1533 record_debugformat ("DWARF 2");
1535 /* Decode line number information if present. */
1536 attr = dwarf_attr (die, DW_AT_stmt_list);
1539 line_offset = DW_UNSND (attr);
1540 dwarf_decode_lines (line_offset, comp_dir, abfd);
1543 /* Process all dies in compilation unit. */
1544 if (die->has_children)
1546 child_die = die->next;
1547 while (child_die && child_die->tag)
1549 process_die (child_die, objfile);
1550 child_die = sibling_die (child_die);
1556 read_func_scope (die, objfile)
1557 struct die_info *die;
1558 struct objfile *objfile;
1560 register struct context_stack *new;
1563 struct die_info *child_die;
1564 struct attribute *attr;
1567 name = dwarf2_linkage_name (die);
1569 /* Ignore functions with missing or empty names and functions with
1570 missing or invalid low and high pc attributes. */
1571 if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile))
1577 if (objfile->ei.entry_point >= lowpc &&
1578 objfile->ei.entry_point < highpc)
1580 objfile->ei.entry_func_lowpc = lowpc;
1581 objfile->ei.entry_func_highpc = highpc;
1584 if (STREQ (name, "main")) /* FIXME: hardwired name */
1586 objfile->ei.main_func_lowpc = lowpc;
1587 objfile->ei.main_func_highpc = highpc;
1590 /* Decode DW_AT_frame_base location descriptor if present, keep result
1591 for DW_OP_fbreg operands in decode_locdesc. */
1592 frame_base_reg = -1;
1593 frame_base_offset = 0;
1594 attr = dwarf_attr (die, DW_AT_frame_base);
1597 CORE_ADDR addr = decode_locdesc (DW_BLOCK (attr), objfile);
1599 frame_base_reg = addr;
1602 frame_base_reg = basereg;
1603 frame_base_offset = addr;
1606 complain (&dwarf2_unsupported_at_frame_base, name);
1609 new = push_context (0, lowpc);
1610 new->name = new_symbol (die, die->type, objfile);
1611 list_in_scope = &local_symbols;
1613 if (die->has_children)
1615 child_die = die->next;
1616 while (child_die && child_die->tag)
1618 process_die (child_die, objfile);
1619 child_die = sibling_die (child_die);
1623 new = pop_context ();
1624 /* Make a block for the local symbols within. */
1625 finish_block (new->name, &local_symbols, new->old_blocks,
1626 lowpc, highpc, objfile);
1627 list_in_scope = &file_symbols;
1630 /* Process all the DIES contained within a lexical block scope. Start
1631 a new scope, process the dies, and then close the scope. */
1634 read_lexical_block_scope (die, objfile)
1635 struct die_info *die;
1636 struct objfile *objfile;
1638 register struct context_stack *new;
1639 CORE_ADDR lowpc, highpc;
1640 struct die_info *child_die;
1642 /* Ignore blocks with missing or invalid low and high pc attributes. */
1643 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile))
1648 push_context (0, lowpc);
1649 if (die->has_children)
1651 child_die = die->next;
1652 while (child_die && child_die->tag)
1654 process_die (child_die, objfile);
1655 child_die = sibling_die (child_die);
1658 new = pop_context ();
1660 if (local_symbols != NULL)
1662 finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
1665 local_symbols = new->locals;
1668 /* Get low and high pc attributes from a die.
1669 Return 1 if the attributes are present and valid, otherwise, return 0. */
1672 dwarf2_get_pc_bounds (die, lowpc, highpc, objfile)
1673 struct die_info *die;
1676 struct objfile *objfile;
1678 struct attribute *attr;
1682 attr = dwarf_attr (die, DW_AT_low_pc);
1684 low = DW_ADDR (attr);
1687 attr = dwarf_attr (die, DW_AT_high_pc);
1689 high = DW_ADDR (attr);
1696 /* When using the GNU linker, .gnu.linkonce. sections are used to
1697 eliminate duplicate copies of functions and vtables and such.
1698 The linker will arbitrarily choose one and discard the others.
1699 The AT_*_pc values for such functions refer to local labels in
1700 these sections. If the section from that file was discarded, the
1701 labels are not in the output, so the relocs get a value of 0.
1702 If this is a discarded function, mark the pc bounds as invalid,
1703 so that GDB will ignore it. */
1704 if (low == 0 && (bfd_get_file_flags (objfile->obfd) & HAS_RELOC) == 0)
1712 /* Add an aggregate field to the field list. */
1715 dwarf2_add_field (fip, die, objfile)
1716 struct field_info *fip;
1717 struct die_info *die;
1718 struct objfile *objfile;
1720 struct nextfield *new_field;
1721 struct attribute *attr;
1723 char *fieldname = "";
1725 /* Allocate a new field list entry and link it in. */
1726 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
1727 make_cleanup (free, new_field);
1728 memset (new_field, 0, sizeof (struct nextfield));
1729 new_field->next = fip->fields;
1730 fip->fields = new_field;
1733 /* Handle accessibility and virtuality of field.
1734 The default accessibility for members is public, the default
1735 accessibility for inheritance is private. */
1736 if (die->tag != DW_TAG_inheritance)
1737 new_field->accessibility = DW_ACCESS_public;
1739 new_field->accessibility = DW_ACCESS_private;
1740 new_field->virtuality = DW_VIRTUALITY_none;
1742 attr = dwarf_attr (die, DW_AT_accessibility);
1744 new_field->accessibility = DW_UNSND (attr);
1745 if (new_field->accessibility != DW_ACCESS_public)
1746 fip->non_public_fields = 1;
1747 attr = dwarf_attr (die, DW_AT_virtuality);
1749 new_field->virtuality = DW_UNSND (attr);
1751 fp = &new_field->field;
1752 if (die->tag == DW_TAG_member)
1754 /* Get type of field. */
1755 fp->type = die_type (die, objfile);
1757 /* Get bit size of field (zero if none). */
1758 attr = dwarf_attr (die, DW_AT_bit_size);
1761 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
1765 FIELD_BITSIZE (*fp) = 0;
1768 /* Get bit offset of field. */
1769 attr = dwarf_attr (die, DW_AT_data_member_location);
1772 FIELD_BITPOS (*fp) =
1773 decode_locdesc (DW_BLOCK (attr), objfile) * bits_per_byte;
1776 FIELD_BITPOS (*fp) = 0;
1777 attr = dwarf_attr (die, DW_AT_bit_offset);
1780 if (BITS_BIG_ENDIAN)
1782 /* For big endian bits, the DW_AT_bit_offset gives the
1783 additional bit offset from the MSB of the containing
1784 anonymous object to the MSB of the field. We don't
1785 have to do anything special since we don't need to
1786 know the size of the anonymous object. */
1787 FIELD_BITPOS (*fp) += DW_UNSND (attr);
1791 /* For little endian bits, compute the bit offset to the
1792 MSB of the anonymous object, subtract off the number of
1793 bits from the MSB of the field to the MSB of the
1794 object, and then subtract off the number of bits of
1795 the field itself. The result is the bit offset of
1796 the LSB of the field. */
1798 int bit_offset = DW_UNSND (attr);
1800 attr = dwarf_attr (die, DW_AT_byte_size);
1803 /* The size of the anonymous object containing
1804 the bit field is explicit, so use the
1805 indicated size (in bytes). */
1806 anonymous_size = DW_UNSND (attr);
1810 /* The size of the anonymous object containing
1811 the bit field must be inferred from the type
1812 attribute of the data member containing the
1814 anonymous_size = TYPE_LENGTH (fp->type);
1816 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
1817 - bit_offset - FIELD_BITSIZE (*fp);
1821 /* Get name of field. */
1822 attr = dwarf_attr (die, DW_AT_name);
1823 if (attr && DW_STRING (attr))
1824 fieldname = DW_STRING (attr);
1825 fp->name = obsavestring (fieldname, strlen (fieldname),
1826 &objfile->type_obstack);
1828 /* Change accessibility for artificial fields (e.g. virtual table
1829 pointer or virtual base class pointer) to private. */
1830 if (dwarf_attr (die, DW_AT_artificial))
1832 new_field->accessibility = DW_ACCESS_private;
1833 fip->non_public_fields = 1;
1836 else if (die->tag == DW_TAG_variable)
1841 /* C++ static member.
1842 Get physical name, extract field name from physical name. */
1843 physname = dwarf2_linkage_name (die);
1844 if (physname == NULL)
1848 while (*cp && !is_cplus_marker (*cp))
1852 if (*fieldname == '\0')
1854 complain (&dwarf2_bad_static_member_name, physname);
1857 SET_FIELD_PHYSNAME (*fp, obsavestring (physname, strlen (physname),
1858 &objfile->type_obstack));
1859 FIELD_TYPE (*fp) = die_type (die, objfile);
1860 FIELD_NAME (*fp) = obsavestring (fieldname, strlen (fieldname),
1861 &objfile->type_obstack);
1863 else if (die->tag == DW_TAG_inheritance)
1865 /* C++ base class field. */
1866 attr = dwarf_attr (die, DW_AT_data_member_location);
1868 FIELD_BITPOS (*fp) = decode_locdesc (DW_BLOCK (attr), objfile) * bits_per_byte;
1869 FIELD_BITSIZE (*fp) = 0;
1870 FIELD_TYPE (*fp) = die_type (die, objfile);
1871 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
1872 fip->nbaseclasses++;
1876 /* Create the vector of fields, and attach it to the type. */
1879 dwarf2_attach_fields_to_type (fip, type, objfile)
1880 struct field_info *fip;
1882 struct objfile *objfile;
1884 int nfields = fip->nfields;
1886 /* Record the field count, allocate space for the array of fields,
1887 and create blank accessibility bitfields if necessary. */
1888 TYPE_NFIELDS (type) = nfields;
1889 TYPE_FIELDS (type) = (struct field *)
1890 TYPE_ALLOC (type, sizeof (struct field) * nfields);
1891 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
1893 if (fip->non_public_fields)
1895 ALLOCATE_CPLUS_STRUCT_TYPE (type);
1897 TYPE_FIELD_PRIVATE_BITS (type) =
1898 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
1899 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
1901 TYPE_FIELD_PROTECTED_BITS (type) =
1902 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
1903 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
1905 TYPE_FIELD_IGNORE_BITS (type) =
1906 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
1907 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
1910 /* If the type has baseclasses, allocate and clear a bit vector for
1911 TYPE_FIELD_VIRTUAL_BITS. */
1912 if (fip->nbaseclasses)
1914 int num_bytes = B_BYTES (fip->nbaseclasses);
1917 ALLOCATE_CPLUS_STRUCT_TYPE (type);
1918 pointer = (char *) TYPE_ALLOC (type, num_bytes);
1919 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
1920 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
1921 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
1924 /* Copy the saved-up fields into the field vector. Start from the head
1925 of the list, adding to the tail of the field array, so that they end
1926 up in the same order in the array in which they were added to the list. */
1927 while (nfields-- > 0)
1929 TYPE_FIELD (type, nfields) = fip->fields->field;
1930 switch (fip->fields->accessibility)
1932 case DW_ACCESS_private:
1933 SET_TYPE_FIELD_PRIVATE (type, nfields);
1936 case DW_ACCESS_protected:
1937 SET_TYPE_FIELD_PROTECTED (type, nfields);
1940 case DW_ACCESS_public:
1944 /* Unknown accessibility. Complain and treat it as public. */
1946 complain (&dwarf2_unsupported_accessibility,
1947 fip->fields->accessibility);
1951 if (nfields < fip->nbaseclasses)
1953 switch (fip->fields->virtuality)
1955 case DW_VIRTUALITY_virtual:
1956 case DW_VIRTUALITY_pure_virtual:
1957 SET_TYPE_FIELD_VIRTUAL (type, nfields);
1961 fip->fields = fip->fields->next;
1965 /* Skip to the end of a member function name in a mangled name. */
1968 skip_member_fn_name (physname)
1971 char *endname = physname;
1973 /* Skip over leading underscores. */
1974 while (*endname == '_')
1977 /* Find two succesive underscores. */
1979 endname = strchr (endname, '_');
1980 while (endname != NULL && *++endname != '_');
1982 if (endname == NULL)
1984 complain (&dwarf2_bad_member_name_complaint, physname);
1989 /* Take care of trailing underscores. */
1990 if (endname[1] != '_')
1996 /* Add a member function to the proper fieldlist. */
1999 dwarf2_add_member_fn (fip, die, type, objfile)
2000 struct field_info *fip;
2001 struct die_info *die;
2003 struct objfile *objfile;
2005 struct attribute *attr;
2006 struct fnfieldlist *flp;
2008 struct fn_field *fnp;
2011 struct nextfnfield *new_fnfield;
2013 /* Extract member function name from mangled name. */
2014 physname = dwarf2_linkage_name (die);
2015 if (physname == NULL)
2017 if ((physname[0] == '_' && physname[1] == '_'
2018 && strchr ("0123456789Qt", physname[2]))
2019 || DESTRUCTOR_PREFIX_P (physname))
2021 /* Constructor and destructor field names are set to the name
2022 of the class, but without template parameter lists.
2023 The name might be missing for anonymous aggregates. */
2024 if (TYPE_TAG_NAME (type))
2026 char *p = strchr (TYPE_TAG_NAME (type), '<');
2029 fieldname = TYPE_TAG_NAME (type);
2031 fieldname = obsavestring (TYPE_TAG_NAME (type),
2032 p - TYPE_TAG_NAME (type),
2033 &objfile->type_obstack);
2037 char *anon_name = "";
2038 fieldname = obsavestring (anon_name, strlen (anon_name),
2039 &objfile->type_obstack);
2044 char *endname = skip_member_fn_name (physname);
2046 /* Ignore member function if we were unable not extract the member
2048 if (endname == physname)
2050 fieldname = obsavestring (physname, endname - physname,
2051 &objfile->type_obstack);
2054 /* Look up member function name in fieldlist. */
2055 for (i = 0; i < fip->nfnfields; i++)
2057 if (STREQ (fip->fnfieldlists[i].name, fieldname))
2061 /* Create new list element if necessary. */
2062 if (i < fip->nfnfields)
2063 flp = &fip->fnfieldlists[i];
2066 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
2068 fip->fnfieldlists = (struct fnfieldlist *)
2069 xrealloc (fip->fnfieldlists,
2070 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
2071 * sizeof (struct fnfieldlist));
2072 if (fip->nfnfields == 0)
2073 make_cleanup (free_current_contents, &fip->fnfieldlists);
2075 flp = &fip->fnfieldlists[fip->nfnfields];
2076 flp->name = fieldname;
2082 /* Create a new member function field and chain it to the field list
2084 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
2085 make_cleanup (free, new_fnfield);
2086 memset (new_fnfield, 0, sizeof (struct nextfnfield));
2087 new_fnfield->next = flp->head;
2088 flp->head = new_fnfield;
2091 /* Fill in the member function field info. */
2092 fnp = &new_fnfield->fnfield;
2093 fnp->physname = obsavestring (physname, strlen (physname),
2094 &objfile->type_obstack);
2095 fnp->type = alloc_type (objfile);
2096 if (die->type && TYPE_CODE (die->type) == TYPE_CODE_FUNC)
2098 struct type *return_type = TYPE_TARGET_TYPE (die->type);
2099 struct type **arg_types;
2100 int nparams = TYPE_NFIELDS (die->type);
2103 /* Copy argument types from the subroutine type. */
2104 arg_types = (struct type **)
2105 TYPE_ALLOC (fnp->type, (nparams + 1) * sizeof (struct type *));
2106 for (iparams = 0; iparams < nparams; iparams++)
2107 arg_types[iparams] = TYPE_FIELD_TYPE (die->type, iparams);
2109 /* Set last entry in argument type vector. */
2110 if (TYPE_FLAGS (die->type) & TYPE_FLAG_VARARGS)
2111 arg_types[nparams] = NULL;
2113 arg_types[nparams] = dwarf2_fundamental_type (objfile, FT_VOID);
2115 smash_to_method_type (fnp->type, type, return_type, arg_types);
2117 /* Handle static member functions.
2118 Dwarf2 has no clean way to discern C++ static and non-static
2119 member functions. G++ helps GDB by marking the first
2120 parameter for non-static member functions (which is the
2121 this pointer) as artificial. We obtain this information
2122 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
2123 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (die->type, 0) == 0)
2124 fnp->voffset = VOFFSET_STATIC;
2127 complain (&dwarf2_missing_member_fn_type_complaint, physname);
2129 /* Get fcontext from DW_AT_containing_type if present. */
2130 if (dwarf_attr (die, DW_AT_containing_type) != NULL)
2131 fnp->fcontext = die_containing_type (die, objfile);
2133 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
2134 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
2136 /* Get accessibility. */
2137 attr = dwarf_attr (die, DW_AT_accessibility);
2140 switch (DW_UNSND (attr))
2142 case DW_ACCESS_private:
2143 fnp->is_private = 1;
2145 case DW_ACCESS_protected:
2146 fnp->is_protected = 1;
2151 /* Get index in virtual function table if it is a virtual member function. */
2152 attr = dwarf_attr (die, DW_AT_vtable_elem_location);
2154 fnp->voffset = decode_locdesc (DW_BLOCK (attr), objfile) + 2;
2157 /* Create the vector of member function fields, and attach it to the type. */
2160 dwarf2_attach_fn_fields_to_type (fip, type, objfile)
2161 struct field_info *fip;
2163 struct objfile *objfile;
2165 struct fnfieldlist *flp;
2166 int total_length = 0;
2169 ALLOCATE_CPLUS_STRUCT_TYPE (type);
2170 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
2171 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
2173 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
2175 struct nextfnfield *nfp = flp->head;
2176 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
2179 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
2180 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
2181 fn_flp->fn_fields = (struct fn_field *)
2182 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
2183 for (k = flp->length; (k--, nfp); nfp = nfp->next)
2184 fn_flp->fn_fields[k] = nfp->fnfield;
2186 total_length += flp->length;
2189 TYPE_NFN_FIELDS (type) = fip->nfnfields;
2190 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
2193 /* Called when we find the DIE that starts a structure or union scope
2194 (definition) to process all dies that define the members of the
2197 NOTE: we need to call struct_type regardless of whether or not the
2198 DIE has an at_name attribute, since it might be an anonymous
2199 structure or union. This gets the type entered into our set of
2202 However, if the structure is incomplete (an opaque struct/union)
2203 then suppress creating a symbol table entry for it since gdb only
2204 wants to find the one with the complete definition. Note that if
2205 it is complete, we just call new_symbol, which does it's own
2206 checking about whether the struct/union is anonymous or not (and
2207 suppresses creating a symbol table entry itself). */
2210 read_structure_scope (die, objfile)
2211 struct die_info *die;
2212 struct objfile *objfile;
2215 struct attribute *attr;
2217 type = alloc_type (objfile);
2219 INIT_CPLUS_SPECIFIC (type);
2220 attr = dwarf_attr (die, DW_AT_name);
2221 if (attr && DW_STRING (attr))
2223 TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr),
2224 strlen (DW_STRING (attr)),
2225 &objfile->type_obstack);
2228 if (die->tag == DW_TAG_structure_type)
2230 TYPE_CODE (type) = TYPE_CODE_STRUCT;
2232 else if (die->tag == DW_TAG_union_type)
2234 TYPE_CODE (type) = TYPE_CODE_UNION;
2238 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
2240 TYPE_CODE (type) = TYPE_CODE_CLASS;
2243 attr = dwarf_attr (die, DW_AT_byte_size);
2246 TYPE_LENGTH (type) = DW_UNSND (attr);
2250 TYPE_LENGTH (type) = 0;
2253 /* We need to add the type field to the die immediately so we don't
2254 infinitely recurse when dealing with pointers to the structure
2255 type within the structure itself. */
2258 if (die->has_children)
2260 struct field_info fi;
2261 struct die_info *child_die;
2262 struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
2264 memset (&fi, 0, sizeof (struct field_info));
2266 child_die = die->next;
2268 while (child_die && child_die->tag)
2270 if (child_die->tag == DW_TAG_member)
2272 dwarf2_add_field (&fi, child_die, objfile);
2274 else if (child_die->tag == DW_TAG_variable)
2276 /* C++ static member. */
2277 dwarf2_add_field (&fi, child_die, objfile);
2279 else if (child_die->tag == DW_TAG_subprogram)
2281 /* C++ member function. */
2282 process_die (child_die, objfile);
2283 dwarf2_add_member_fn (&fi, child_die, type, objfile);
2285 else if (child_die->tag == DW_TAG_inheritance)
2287 /* C++ base class field. */
2288 dwarf2_add_field (&fi, child_die, objfile);
2292 process_die (child_die, objfile);
2294 child_die = sibling_die (child_die);
2297 /* Attach fields and member functions to the type. */
2299 dwarf2_attach_fields_to_type (&fi, type, objfile);
2302 dwarf2_attach_fn_fields_to_type (&fi, type, objfile);
2304 /* Get the type which refers to the base class (possibly this
2305 class itself) which contains the vtable pointer for the current
2306 class from the DW_AT_containing_type attribute. */
2308 if (dwarf_attr (die, DW_AT_containing_type) != NULL)
2310 struct type *t = die_containing_type (die, objfile);
2312 TYPE_VPTR_BASETYPE (type) = t;
2315 static const char vptr_name[] = { '_','v','p','t','r','\0' };
2318 /* Our own class provides vtbl ptr. */
2319 for (i = TYPE_NFIELDS (t) - 1;
2320 i >= TYPE_N_BASECLASSES (t);
2323 char *fieldname = TYPE_FIELD_NAME (t, i);
2325 if (STREQN (fieldname, vptr_name, strlen (vptr_name) - 1)
2326 && is_cplus_marker (fieldname[strlen (vptr_name)]))
2328 TYPE_VPTR_FIELDNO (type) = i;
2333 /* Complain if virtual function table field not found. */
2334 if (i < TYPE_N_BASECLASSES (t))
2335 complain (&dwarf2_vtbl_not_found_complaint,
2336 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : "");
2340 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
2345 new_symbol (die, type, objfile);
2347 do_cleanups (back_to);
2351 /* No children, must be stub. */
2352 TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
2358 /* Given a pointer to a die which begins an enumeration, process all
2359 the dies that define the members of the enumeration.
2361 This will be much nicer in draft 6 of the DWARF spec when our
2362 members will be dies instead squished into the DW_AT_element_list
2365 NOTE: We reverse the order of the element list. */
2368 read_enumeration (die, objfile)
2369 struct die_info *die;
2370 struct objfile *objfile;
2372 struct die_info *child_die;
2374 struct field *fields;
2375 struct attribute *attr;
2378 int unsigned_enum = 1;
2380 type = alloc_type (objfile);
2382 TYPE_CODE (type) = TYPE_CODE_ENUM;
2383 attr = dwarf_attr (die, DW_AT_name);
2384 if (attr && DW_STRING (attr))
2386 TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr),
2387 strlen (DW_STRING (attr)),
2388 &objfile->type_obstack);
2391 attr = dwarf_attr (die, DW_AT_byte_size);
2394 TYPE_LENGTH (type) = DW_UNSND (attr);
2398 TYPE_LENGTH (type) = 0;
2403 if (die->has_children)
2405 child_die = die->next;
2406 while (child_die && child_die->tag)
2408 if (child_die->tag != DW_TAG_enumerator)
2410 process_die (child_die, objfile);
2414 attr = dwarf_attr (child_die, DW_AT_name);
2417 sym = new_symbol (child_die, type, objfile);
2418 if (SYMBOL_VALUE (sym) < 0)
2421 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
2423 fields = (struct field *)
2425 (num_fields + DW_FIELD_ALLOC_CHUNK)
2426 * sizeof (struct field));
2429 FIELD_NAME (fields[num_fields]) = SYMBOL_NAME (sym);
2430 FIELD_TYPE (fields[num_fields]) = NULL;
2431 FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym);
2432 FIELD_BITSIZE (fields[num_fields]) = 0;
2438 child_die = sibling_die (child_die);
2443 TYPE_NFIELDS (type) = num_fields;
2444 TYPE_FIELDS (type) = (struct field *)
2445 TYPE_ALLOC (type, sizeof (struct field) * num_fields);
2446 memcpy (TYPE_FIELDS (type), fields,
2447 sizeof (struct field) * num_fields);
2451 TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED;
2454 new_symbol (die, type, objfile);
2457 /* Extract all information from a DW_TAG_array_type DIE and put it in
2458 the DIE's type field. For now, this only handles one dimensional
2462 read_array_type (die, objfile)
2463 struct die_info *die;
2464 struct objfile *objfile;
2466 struct die_info *child_die;
2467 struct type *type = NULL;
2468 struct type *element_type, *range_type, *index_type;
2469 struct type **range_types = NULL;
2470 struct attribute *attr;
2472 struct cleanup *back_to;
2474 /* Return if we've already decoded this type. */
2480 element_type = die_type (die, objfile);
2482 /* Irix 6.2 native cc creates array types without children for
2483 arrays with unspecified length. */
2484 if (die->has_children == 0)
2486 index_type = dwarf2_fundamental_type (objfile, FT_INTEGER);
2487 range_type = create_range_type (NULL, index_type, 0, -1);
2488 die->type = create_array_type (NULL, element_type, range_type);
2492 back_to = make_cleanup (null_cleanup, NULL);
2493 child_die = die->next;
2494 while (child_die && child_die->tag)
2496 if (child_die->tag == DW_TAG_subrange_type)
2498 unsigned int low, high;
2500 /* Default bounds to an array with unspecified length. */
2503 if (cu_language == language_fortran)
2505 /* FORTRAN implies a lower bound of 1, if not given. */
2509 index_type = die_type (child_die, objfile);
2510 attr = dwarf_attr (child_die, DW_AT_lower_bound);
2513 if (attr->form == DW_FORM_sdata)
2515 low = DW_SND (attr);
2517 else if (attr->form == DW_FORM_udata
2518 || attr->form == DW_FORM_data1
2519 || attr->form == DW_FORM_data2
2520 || attr->form == DW_FORM_data4)
2522 low = DW_UNSND (attr);
2526 complain (&dwarf2_non_const_array_bound_ignored,
2527 dwarf_form_name (attr->form));
2529 die->type = lookup_pointer_type (element_type);
2536 attr = dwarf_attr (child_die, DW_AT_upper_bound);
2539 if (attr->form == DW_FORM_sdata)
2541 high = DW_SND (attr);
2543 else if (attr->form == DW_FORM_udata
2544 || attr->form == DW_FORM_data1
2545 || attr->form == DW_FORM_data2
2546 || attr->form == DW_FORM_data4)
2548 high = DW_UNSND (attr);
2550 else if (attr->form == DW_FORM_block1)
2552 /* GCC encodes arrays with unspecified or dynamic length
2553 with a DW_FORM_block1 attribute.
2554 FIXME: GDB does not yet know how to handle dynamic
2555 arrays properly, treat them as arrays with unspecified
2561 complain (&dwarf2_non_const_array_bound_ignored,
2562 dwarf_form_name (attr->form));
2564 die->type = lookup_pointer_type (element_type);
2572 /* Create a range type and save it for array type creation. */
2573 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
2575 range_types = (struct type **)
2576 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
2577 * sizeof (struct type *));
2579 make_cleanup (free_current_contents, &range_types);
2581 range_types[ndim++] = create_range_type (NULL, index_type, low, high);
2583 child_die = sibling_die (child_die);
2586 /* Dwarf2 dimensions are output from left to right, create the
2587 necessary array types in backwards order. */
2588 type = element_type;
2590 type = create_array_type (NULL, type, range_types[ndim]);
2592 do_cleanups (back_to);
2594 /* Install the type in the die. */
2598 /* First cut: install each common block member as a global variable. */
2601 read_common_block (die, objfile)
2602 struct die_info *die;
2603 struct objfile *objfile;
2605 struct die_info *child_die;
2606 struct attribute *attr;
2608 CORE_ADDR base = (CORE_ADDR) 0;
2610 attr = dwarf_attr (die, DW_AT_location);
2613 base = decode_locdesc (DW_BLOCK (attr), objfile);
2615 if (die->has_children)
2617 child_die = die->next;
2618 while (child_die && child_die->tag)
2620 sym = new_symbol (child_die, NULL, objfile);
2621 attr = dwarf_attr (child_die, DW_AT_data_member_location);
2624 SYMBOL_VALUE_ADDRESS (sym) =
2625 base + decode_locdesc (DW_BLOCK (attr), objfile);
2626 add_symbol_to_list (sym, &global_symbols);
2628 child_die = sibling_die (child_die);
2633 /* Extract all information from a DW_TAG_pointer_type DIE and add to
2634 the user defined type vector. */
2637 read_tag_pointer_type (die, objfile)
2638 struct die_info *die;
2639 struct objfile *objfile;
2642 struct attribute *attr;
2649 type = lookup_pointer_type (die_type (die, objfile));
2650 attr = dwarf_attr (die, DW_AT_byte_size);
2653 TYPE_LENGTH (type) = DW_UNSND (attr);
2657 TYPE_LENGTH (type) = address_size;
2662 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
2663 the user defined type vector. */
2666 read_tag_ptr_to_member_type (die, objfile)
2667 struct die_info *die;
2668 struct objfile *objfile;
2671 struct type *to_type;
2672 struct type *domain;
2679 type = alloc_type (objfile);
2680 to_type = die_type (die, objfile);
2681 domain = die_containing_type (die, objfile);
2682 smash_to_member_type (type, domain, to_type);
2687 /* Extract all information from a DW_TAG_reference_type DIE and add to
2688 the user defined type vector. */
2691 read_tag_reference_type (die, objfile)
2692 struct die_info *die;
2693 struct objfile *objfile;
2696 struct attribute *attr;
2703 type = lookup_reference_type (die_type (die, objfile));
2704 attr = dwarf_attr (die, DW_AT_byte_size);
2707 TYPE_LENGTH (type) = DW_UNSND (attr);
2711 TYPE_LENGTH (type) = address_size;
2717 read_tag_const_type (die, objfile)
2718 struct die_info *die;
2719 struct objfile *objfile;
2726 complain (&dwarf2_const_ignored);
2727 die->type = die_type (die, objfile);
2731 read_tag_volatile_type (die, objfile)
2732 struct die_info *die;
2733 struct objfile *objfile;
2740 complain (&dwarf2_volatile_ignored);
2741 die->type = die_type (die, objfile);
2744 /* Extract all information from a DW_TAG_string_type DIE and add to
2745 the user defined type vector. It isn't really a user defined type,
2746 but it behaves like one, with other DIE's using an AT_user_def_type
2747 attribute to reference it. */
2750 read_tag_string_type (die, objfile)
2751 struct die_info *die;
2752 struct objfile *objfile;
2754 struct type *type, *range_type, *index_type, *char_type;
2755 struct attribute *attr;
2756 unsigned int length;
2763 attr = dwarf_attr (die, DW_AT_string_length);
2766 length = DW_UNSND (attr);
2772 index_type = dwarf2_fundamental_type (objfile, FT_INTEGER);
2773 range_type = create_range_type (NULL, index_type, 1, length);
2774 char_type = dwarf2_fundamental_type (objfile, FT_CHAR);
2775 type = create_string_type (char_type, range_type);
2779 /* Handle DIES due to C code like:
2783 int (*funcp)(int a, long l);
2787 ('funcp' generates a DW_TAG_subroutine_type DIE)
2791 read_subroutine_type (die, objfile)
2792 struct die_info *die;
2793 struct objfile *objfile;
2795 struct type *type; /* Type that this function returns */
2796 struct type *ftype; /* Function that returns above type */
2797 struct attribute *attr;
2799 /* Decode the type that this subroutine returns */
2804 type = die_type (die, objfile);
2805 ftype = lookup_function_type (type);
2807 /* All functions in C++ have prototypes. */
2808 attr = dwarf_attr (die, DW_AT_prototyped);
2809 if ((attr && (DW_UNSND (attr) != 0))
2810 || cu_language == language_cplus)
2811 TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED;
2813 if (die->has_children)
2815 struct die_info *child_die;
2819 /* Count the number of parameters.
2820 FIXME: GDB currently ignores vararg functions, but knows about
2821 vararg member functions. */
2822 child_die = die->next;
2823 while (child_die && child_die->tag)
2825 if (child_die->tag == DW_TAG_formal_parameter)
2827 else if (child_die->tag == DW_TAG_unspecified_parameters)
2828 TYPE_FLAGS (ftype) |= TYPE_FLAG_VARARGS;
2829 child_die = sibling_die (child_die);
2832 /* Allocate storage for parameters and fill them in. */
2833 TYPE_NFIELDS (ftype) = nparams;
2834 TYPE_FIELDS (ftype) = (struct field *)
2835 TYPE_ALLOC (ftype, nparams * sizeof (struct field));
2837 child_die = die->next;
2838 while (child_die && child_die->tag)
2840 if (child_die->tag == DW_TAG_formal_parameter)
2842 /* Dwarf2 has no clean way to discern C++ static and non-static
2843 member functions. G++ helps GDB by marking the first
2844 parameter for non-static member functions (which is the
2845 this pointer) as artificial. We pass this information
2846 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
2847 attr = dwarf_attr (child_die, DW_AT_artificial);
2849 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
2851 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
2852 TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, objfile);
2855 child_die = sibling_die (child_die);
2863 read_typedef (die, objfile)
2864 struct die_info *die;
2865 struct objfile *objfile;
2871 struct attribute *attr;
2874 xtype = die_type (die, objfile);
2876 type = alloc_type (objfile);
2877 TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
2878 TYPE_FLAGS (type) |= TYPE_FLAG_TARGET_STUB;
2879 TYPE_TARGET_TYPE (type) = xtype;
2880 attr = dwarf_attr (die, DW_AT_name);
2881 if (attr && DW_STRING (attr))
2882 TYPE_NAME (type) = obsavestring (DW_STRING (attr),
2883 strlen (DW_STRING (attr)),
2884 &objfile->type_obstack);
2890 /* Find a representation of a given base type and install
2891 it in the TYPE field of the die. */
2894 read_base_type (die, objfile)
2895 struct die_info *die;
2896 struct objfile *objfile;
2899 struct attribute *attr;
2900 int encoding = 0, size = 0;
2902 /* If we've already decoded this die, this is a no-op. */
2908 attr = dwarf_attr (die, DW_AT_encoding);
2911 encoding = DW_UNSND (attr);
2913 attr = dwarf_attr (die, DW_AT_byte_size);
2916 size = DW_UNSND (attr);
2918 attr = dwarf_attr (die, DW_AT_name);
2919 if (attr && DW_STRING (attr))
2921 enum type_code code = TYPE_CODE_INT;
2922 int is_unsigned = 0;
2926 case DW_ATE_address:
2927 /* Turn DW_ATE_address into a void * pointer. */
2928 code = TYPE_CODE_PTR;
2931 case DW_ATE_boolean:
2932 code = TYPE_CODE_BOOL;
2935 case DW_ATE_complex_float:
2936 code = TYPE_CODE_COMPLEX;
2939 code = TYPE_CODE_FLT;
2942 case DW_ATE_signed_char:
2944 case DW_ATE_unsigned:
2945 case DW_ATE_unsigned_char:
2949 complain (&dwarf2_unsupported_at_encoding,
2950 dwarf_type_encoding_name (encoding));
2953 type = init_type (code, size, is_unsigned, DW_STRING (attr), objfile);
2954 if (encoding == DW_ATE_address)
2955 TYPE_TARGET_TYPE (type) = dwarf2_fundamental_type (objfile, FT_VOID);
2959 type = dwarf_base_type (encoding, size, objfile);
2964 /* Read a whole compilation unit into a linked list of dies. */
2967 read_comp_unit (info_ptr, abfd)
2971 struct die_info *first_die, *last_die, *die;
2975 /* Reset die reference table, we are building a new one now. */
2976 dwarf2_empty_die_ref_table ();
2980 first_die = last_die = NULL;
2983 cur_ptr = read_full_die (&die, abfd, cur_ptr);
2984 if (die->has_children)
2995 /* Enter die in reference hash table */
2996 store_in_ref_table (die->offset, die);
3000 first_die = last_die = die;
3004 last_die->next = die;
3008 while (nesting_level > 0);
3012 /* Free a linked list of dies. */
3015 free_die_list (dies)
3016 struct die_info *dies;
3018 struct die_info *die, *next;
3030 /* Read the contents of the section at OFFSET and of size SIZE from the
3031 object file specified by OBJFILE into the psymbol_obstack and return it. */
3034 dwarf2_read_section (objfile, offset, size)
3035 struct objfile *objfile;
3039 bfd *abfd = objfile->obfd;
3045 buf = (char *) obstack_alloc (&objfile->psymbol_obstack, size);
3046 if ((bfd_seek (abfd, offset, SEEK_SET) != 0) ||
3047 (bfd_read (buf, size, 1, abfd) != size))
3050 error ("Dwarf Error: Can't read DWARF data from '%s'",
3051 bfd_get_filename (abfd));
3056 /* In DWARF version 2, the description of the debugging information is
3057 stored in a separate .debug_abbrev section. Before we read any
3058 dies from a section we read in all abbreviations and install them
3062 dwarf2_read_abbrevs (abfd, offset)
3064 unsigned int offset;
3067 struct abbrev_info *cur_abbrev;
3068 unsigned int abbrev_number, bytes_read, abbrev_name;
3069 unsigned int abbrev_form, hash_number;
3071 /* empty the table */
3072 dwarf2_empty_abbrev_table (NULL);
3074 abbrev_ptr = dwarf_abbrev_buffer + offset;
3075 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3076 abbrev_ptr += bytes_read;
3078 /* loop until we reach an abbrev number of 0 */
3079 while (abbrev_number)
3081 cur_abbrev = dwarf_alloc_abbrev ();
3083 /* read in abbrev header */
3084 cur_abbrev->number = abbrev_number;
3085 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3086 abbrev_ptr += bytes_read;
3087 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
3090 /* now read in declarations */
3091 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3092 abbrev_ptr += bytes_read;
3093 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3094 abbrev_ptr += bytes_read;
3097 if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0)
3099 cur_abbrev->attrs = (struct attr_abbrev *)
3100 xrealloc (cur_abbrev->attrs,
3101 (cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK)
3102 * sizeof (struct attr_abbrev));
3104 cur_abbrev->attrs[cur_abbrev->num_attrs].name = abbrev_name;
3105 cur_abbrev->attrs[cur_abbrev->num_attrs++].form = abbrev_form;
3106 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3107 abbrev_ptr += bytes_read;
3108 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3109 abbrev_ptr += bytes_read;
3112 hash_number = abbrev_number % ABBREV_HASH_SIZE;
3113 cur_abbrev->next = dwarf2_abbrevs[hash_number];
3114 dwarf2_abbrevs[hash_number] = cur_abbrev;
3116 /* Get next abbreviation.
3117 Under Irix6 the abbreviations for a compilation unit are not
3118 always properly terminated with an abbrev number of 0.
3119 Exit loop if we encounter an abbreviation which we have
3120 already read (which means we are about to read the abbreviations
3121 for the next compile unit) or if the end of the abbreviation
3122 table is reached. */
3123 if ((unsigned int) (abbrev_ptr - dwarf_abbrev_buffer)
3124 >= dwarf_abbrev_size)
3126 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3127 abbrev_ptr += bytes_read;
3128 if (dwarf2_lookup_abbrev (abbrev_number) != NULL)
3133 /* Empty the abbrev table for a new compilation unit. */
3137 dwarf2_empty_abbrev_table (ignore)
3141 struct abbrev_info *abbrev, *next;
3143 for (i = 0; i < ABBREV_HASH_SIZE; ++i)
3146 abbrev = dwarf2_abbrevs[i];
3149 next = abbrev->next;
3150 free (abbrev->attrs);
3154 dwarf2_abbrevs[i] = NULL;
3158 /* Lookup an abbrev_info structure in the abbrev hash table. */
3160 static struct abbrev_info *
3161 dwarf2_lookup_abbrev (number)
3162 unsigned int number;
3164 unsigned int hash_number;
3165 struct abbrev_info *abbrev;
3167 hash_number = number % ABBREV_HASH_SIZE;
3168 abbrev = dwarf2_abbrevs[hash_number];
3172 if (abbrev->number == number)
3175 abbrev = abbrev->next;
3180 /* Read a minimal amount of information into the minimal die structure. */
3183 read_partial_die (part_die, abfd, info_ptr, has_pc_info)
3184 struct partial_die_info *part_die;
3189 unsigned int abbrev_number, bytes_read, i;
3190 struct abbrev_info *abbrev;
3191 struct attribute attr;
3192 struct attribute spec_attr;
3193 int found_spec_attr = 0;
3194 int has_low_pc_attr = 0;
3195 int has_high_pc_attr = 0;
3197 *part_die = zeroed_partial_die;
3199 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3200 info_ptr += bytes_read;
3204 abbrev = dwarf2_lookup_abbrev (abbrev_number);
3207 error ("Dwarf Error: Could not find abbrev number %d.", abbrev_number);
3209 part_die->offset = info_ptr - dwarf_info_buffer;
3210 part_die->tag = abbrev->tag;
3211 part_die->has_children = abbrev->has_children;
3212 part_die->abbrev = abbrev_number;
3214 for (i = 0; i < abbrev->num_attrs; ++i)
3216 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr);
3218 /* Store the data if it is of an attribute we want to keep in a
3219 partial symbol table. */
3224 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
3225 if (part_die->name == NULL)
3226 part_die->name = DW_STRING (&attr);
3228 case DW_AT_MIPS_linkage_name:
3229 part_die->name = DW_STRING (&attr);
3232 has_low_pc_attr = 1;
3233 part_die->lowpc = DW_ADDR (&attr);
3236 has_high_pc_attr = 1;
3237 part_die->highpc = DW_ADDR (&attr);
3239 case DW_AT_location:
3240 part_die->locdesc = DW_BLOCK (&attr);
3242 case DW_AT_language:
3243 part_die->language = DW_UNSND (&attr);
3245 case DW_AT_external:
3246 part_die->is_external = DW_UNSND (&attr);
3248 case DW_AT_declaration:
3249 part_die->is_declaration = DW_UNSND (&attr);
3252 part_die->has_type = 1;
3254 case DW_AT_abstract_origin:
3255 case DW_AT_specification:
3256 found_spec_attr = 1;
3260 /* Ignore absolute siblings, they might point outside of
3261 the current compile unit. */
3262 if (attr.form == DW_FORM_ref_addr)
3263 complain(&dwarf2_absolute_sibling_complaint);
3266 dwarf_info_buffer + dwarf2_get_ref_die_offset (&attr);
3273 /* If we found a reference attribute and the die has no name, try
3274 to find a name in the referred to die. */
3276 if (found_spec_attr && part_die->name == NULL)
3278 struct partial_die_info spec_die;
3282 spec_ptr = dwarf_info_buffer + dwarf2_get_ref_die_offset (&spec_attr);
3283 read_partial_die (&spec_die, abfd, spec_ptr, &dummy);
3286 part_die->name = spec_die.name;
3288 /* Copy DW_AT_external attribute if it is set. */
3289 if (spec_die.is_external)
3290 part_die->is_external = spec_die.is_external;
3294 /* When using the GNU linker, .gnu.linkonce. sections are used to
3295 eliminate duplicate copies of functions and vtables and such.
3296 The linker will arbitrarily choose one and discard the others.
3297 The AT_*_pc values for such functions refer to local labels in
3298 these sections. If the section from that file was discarded, the
3299 labels are not in the output, so the relocs get a value of 0.
3300 If this is a discarded function, mark the pc bounds as invalid,
3301 so that GDB will ignore it. */
3302 if (has_low_pc_attr && has_high_pc_attr
3303 && part_die->lowpc < part_die->highpc
3304 && (part_die->lowpc != 0
3305 || (bfd_get_file_flags (abfd) & HAS_RELOC)))
3310 /* Read the die from the .debug_info section buffer. And set diep to
3311 point to a newly allocated die with its information. */
3314 read_full_die (diep, abfd, info_ptr)
3315 struct die_info **diep;
3319 unsigned int abbrev_number, bytes_read, i, offset;
3320 struct abbrev_info *abbrev;
3321 struct die_info *die;
3323 offset = info_ptr - dwarf_info_buffer;
3324 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3325 info_ptr += bytes_read;
3328 die = dwarf_alloc_die ();
3330 die->abbrev = abbrev_number;
3336 abbrev = dwarf2_lookup_abbrev (abbrev_number);
3339 error ("Dwarf Error: could not find abbrev number %d.", abbrev_number);
3341 die = dwarf_alloc_die ();
3342 die->offset = offset;
3343 die->tag = abbrev->tag;
3344 die->has_children = abbrev->has_children;
3345 die->abbrev = abbrev_number;
3348 die->num_attrs = abbrev->num_attrs;
3349 die->attrs = (struct attribute *)
3350 xmalloc (die->num_attrs * sizeof (struct attribute));
3352 for (i = 0; i < abbrev->num_attrs; ++i)
3354 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
3362 /* Read an attribute described by an abbreviated attribute. */
3365 read_attribute (attr, abbrev, abfd, info_ptr)
3366 struct attribute *attr;
3367 struct attr_abbrev *abbrev;
3371 unsigned int bytes_read;
3372 struct dwarf_block *blk;
3374 attr->name = abbrev->name;
3375 attr->form = abbrev->form;
3376 switch (abbrev->form)
3379 case DW_FORM_ref_addr:
3380 DW_ADDR (attr) = read_address (abfd, info_ptr);
3381 info_ptr += address_size;
3383 case DW_FORM_block2:
3384 blk = dwarf_alloc_block ();
3385 blk->size = read_2_bytes (abfd, info_ptr);
3387 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
3388 info_ptr += blk->size;
3389 DW_BLOCK (attr) = blk;
3391 case DW_FORM_block4:
3392 blk = dwarf_alloc_block ();
3393 blk->size = read_4_bytes (abfd, info_ptr);
3395 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
3396 info_ptr += blk->size;
3397 DW_BLOCK (attr) = blk;
3400 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
3404 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
3408 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
3411 case DW_FORM_string:
3412 DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
3413 info_ptr += bytes_read;
3416 blk = dwarf_alloc_block ();
3417 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3418 info_ptr += bytes_read;
3419 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
3420 info_ptr += blk->size;
3421 DW_BLOCK (attr) = blk;
3423 case DW_FORM_block1:
3424 blk = dwarf_alloc_block ();
3425 blk->size = read_1_byte (abfd, info_ptr);
3427 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
3428 info_ptr += blk->size;
3429 DW_BLOCK (attr) = blk;
3432 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
3436 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
3440 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
3441 info_ptr += bytes_read;
3444 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3445 info_ptr += bytes_read;
3448 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
3452 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
3456 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
3459 case DW_FORM_ref_udata:
3460 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3461 info_ptr += bytes_read;
3464 case DW_FORM_indirect:
3466 error ("Dwarf Error: Cannot handle %s in DWARF reader.",
3467 dwarf_form_name (abbrev->form));
3472 /* read dwarf information from a buffer */
3475 read_1_byte (abfd, buf)
3479 return bfd_get_8 (abfd, (bfd_byte *) buf);
3483 read_1_signed_byte (abfd, buf)
3487 return bfd_get_signed_8 (abfd, (bfd_byte *) buf);
3491 read_2_bytes (abfd, buf)
3495 return bfd_get_16 (abfd, (bfd_byte *) buf);
3499 read_2_signed_bytes (abfd, buf)
3503 return bfd_get_signed_16 (abfd, (bfd_byte *) buf);
3507 read_4_bytes (abfd, buf)
3511 return bfd_get_32 (abfd, (bfd_byte *) buf);
3515 read_4_signed_bytes (abfd, buf)
3519 return bfd_get_signed_32 (abfd, (bfd_byte *) buf);
3523 read_8_bytes (abfd, buf)
3527 return bfd_get_64 (abfd, (bfd_byte *) buf);
3531 read_address (abfd, buf)
3535 CORE_ADDR retval = 0;
3537 switch (address_size)
3540 retval = bfd_get_32 (abfd, (bfd_byte *) buf);
3543 retval = bfd_get_64 (abfd, (bfd_byte *) buf);
3546 /* *THE* alternative is 8, right? */
3549 /* If the address being read is larger than the address that is
3550 applicable for the object file format then mask it down to the
3551 correct size. Take care to avoid unnecessary shift or shift
3553 if (address_size > address_significant_size
3554 && address_significant_size < sizeof (CORE_ADDR))
3556 CORE_ADDR mask = ((CORE_ADDR) 0) - 1;
3557 retval &= ~(mask << (address_significant_size * 8));
3563 read_n_bytes (abfd, buf, size)
3568 /* If the size of a host char is 8 bits, we can return a pointer
3569 to the buffer, otherwise we have to copy the data to a buffer
3570 allocated on the temporary obstack. */
3571 #if HOST_CHAR_BIT == 8
3577 ret = obstack_alloc (&dwarf2_tmp_obstack, size);
3578 for (i = 0; i < size; ++i)
3580 ret[i] = bfd_get_8 (abfd, (bfd_byte *) buf);
3588 read_string (abfd, buf, bytes_read_ptr)
3591 unsigned int *bytes_read_ptr;
3593 /* If the size of a host char is 8 bits, we can return a pointer
3594 to the string, otherwise we have to copy the string to a buffer
3595 allocated on the temporary obstack. */
3596 #if HOST_CHAR_BIT == 8
3599 *bytes_read_ptr = 1;
3602 *bytes_read_ptr = strlen (buf) + 1;
3608 while ((byte = bfd_get_8 (abfd, (bfd_byte *) buf)) != 0)
3610 obstack_1grow (&dwarf2_tmp_obstack, byte);
3616 *bytes_read_ptr = 1;
3619 obstack_1grow (&dwarf2_tmp_obstack, '\0');
3620 *bytes_read_ptr = i + 1;
3621 return obstack_finish (&dwarf2_tmp_obstack);
3626 read_unsigned_leb128 (abfd, buf, bytes_read_ptr)
3629 unsigned int *bytes_read_ptr;
3631 unsigned int result, num_read;
3641 byte = bfd_get_8 (abfd, (bfd_byte *) buf);
3644 result |= ((byte & 127) << shift);
3645 if ((byte & 128) == 0)
3651 *bytes_read_ptr = num_read;
3656 read_signed_leb128 (abfd, buf, bytes_read_ptr)
3659 unsigned int *bytes_read_ptr;
3662 int i, shift, size, num_read;
3672 byte = bfd_get_8 (abfd, (bfd_byte *) buf);
3675 result |= ((byte & 127) << shift);
3677 if ((byte & 128) == 0)
3682 if ((shift < size) && (byte & 0x40))
3684 result |= -(1 << shift);
3686 *bytes_read_ptr = num_read;
3691 set_cu_language (lang)
3698 cu_language = language_c;
3700 case DW_LANG_C_plus_plus:
3701 cu_language = language_cplus;
3703 case DW_LANG_Fortran77:
3704 case DW_LANG_Fortran90:
3705 cu_language = language_fortran;
3707 case DW_LANG_Mips_Assembler:
3708 cu_language = language_asm;
3711 case DW_LANG_Cobol74:
3712 case DW_LANG_Cobol85:
3713 case DW_LANG_Pascal83:
3714 case DW_LANG_Modula2:
3716 cu_language = language_unknown;
3719 cu_language_defn = language_def (cu_language);
3722 /* Return the named attribute or NULL if not there. */
3724 static struct attribute *
3725 dwarf_attr (die, name)
3726 struct die_info *die;
3730 struct attribute *spec = NULL;
3732 for (i = 0; i < die->num_attrs; ++i)
3734 if (die->attrs[i].name == name)
3736 return &die->attrs[i];
3738 if (die->attrs[i].name == DW_AT_specification
3739 || die->attrs[i].name == DW_AT_abstract_origin)
3740 spec = &die->attrs[i];
3744 struct die_info *ref_die =
3745 follow_die_ref (dwarf2_get_ref_die_offset (spec));
3748 return dwarf_attr (ref_die, name);
3754 /* Decode the line number information for the compilation unit whose
3755 line number info is at OFFSET in the .debug_line section.
3756 The compilation directory of the file is passed in COMP_DIR. */
3760 unsigned int num_files;
3773 unsigned int num_dirs;
3778 dwarf_decode_lines (offset, comp_dir, abfd)
3779 unsigned int offset;
3785 struct line_head lh;
3786 struct cleanup *back_to;
3787 unsigned int i, bytes_read;
3788 char *cur_file, *cur_dir;
3789 unsigned char op_code, extended_op, adj_opcode;
3791 #define FILE_ALLOC_CHUNK 5
3792 #define DIR_ALLOC_CHUNK 5
3794 struct filenames files;
3795 struct directories dirs;
3797 if (dwarf_line_buffer == NULL)
3799 complain (&dwarf2_missing_line_number_section);
3803 files.num_files = 0;
3809 line_ptr = dwarf_line_buffer + offset;
3811 /* read in the prologue */
3812 lh.total_length = read_4_bytes (abfd, line_ptr);
3814 line_end = line_ptr + lh.total_length;
3815 lh.version = read_2_bytes (abfd, line_ptr);
3817 lh.prologue_length = read_4_bytes (abfd, line_ptr);
3819 lh.minimum_instruction_length = read_1_byte (abfd, line_ptr);
3821 lh.default_is_stmt = read_1_byte (abfd, line_ptr);
3823 lh.line_base = read_1_signed_byte (abfd, line_ptr);
3825 lh.line_range = read_1_byte (abfd, line_ptr);
3827 lh.opcode_base = read_1_byte (abfd, line_ptr);
3829 lh.standard_opcode_lengths = (unsigned char *)
3830 xmalloc (lh.opcode_base * sizeof (unsigned char));
3831 back_to = make_cleanup (free_current_contents, &lh.standard_opcode_lengths);
3833 lh.standard_opcode_lengths[0] = 1;
3834 for (i = 1; i < lh.opcode_base; ++i)
3836 lh.standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
3840 /* Read directory table */
3841 while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
3843 line_ptr += bytes_read;
3844 if ((dirs.num_dirs % DIR_ALLOC_CHUNK) == 0)
3846 dirs.dirs = (char **)
3847 xrealloc (dirs.dirs,
3848 (dirs.num_dirs + DIR_ALLOC_CHUNK) * sizeof (char *));
3849 if (dirs.num_dirs == 0)
3850 make_cleanup (free_current_contents, &dirs.dirs);
3852 dirs.dirs[dirs.num_dirs++] = cur_dir;
3854 line_ptr += bytes_read;
3856 /* Read file name table */
3857 while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
3859 line_ptr += bytes_read;
3860 if ((files.num_files % FILE_ALLOC_CHUNK) == 0)
3862 files.files = (struct fileinfo *)
3863 xrealloc (files.files,
3864 (files.num_files + FILE_ALLOC_CHUNK)
3865 * sizeof (struct fileinfo));
3866 if (files.num_files == 0)
3867 make_cleanup (free_current_contents, &files.files);
3869 files.files[files.num_files].name = cur_file;
3870 files.files[files.num_files].dir =
3871 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3872 line_ptr += bytes_read;
3873 files.files[files.num_files].time =
3874 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3875 line_ptr += bytes_read;
3876 files.files[files.num_files].size =
3877 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3878 line_ptr += bytes_read;
3881 line_ptr += bytes_read;
3883 /* Read the statement sequences until there's nothing left. */
3884 while (line_ptr < line_end)
3886 /* state machine registers */
3887 CORE_ADDR address = 0;
3888 unsigned int file = 1;
3889 unsigned int line = 1;
3890 unsigned int column = 0;
3891 int is_stmt = lh.default_is_stmt;
3892 int basic_block = 0;
3893 int end_sequence = 0;
3895 /* Start a subfile for the current file of the state machine. */
3896 if (files.num_files >= file)
3898 /* The file and directory tables are 0 based, the references
3900 dwarf2_start_subfile (files.files[file - 1].name,
3901 (files.files[file - 1].dir
3902 ? dirs.dirs[files.files[file - 1].dir - 1]
3906 /* Decode the table. */
3907 while (! end_sequence)
3909 op_code = read_1_byte (abfd, line_ptr);
3913 case DW_LNS_extended_op:
3914 line_ptr += 1; /* ignore length */
3915 extended_op = read_1_byte (abfd, line_ptr);
3917 switch (extended_op)
3919 case DW_LNE_end_sequence:
3921 record_line (current_subfile, line, address);
3923 case DW_LNE_set_address:
3924 address = read_address (abfd, line_ptr) + baseaddr;
3925 line_ptr += address_size;
3927 case DW_LNE_define_file:
3928 cur_file = read_string (abfd, line_ptr, &bytes_read);
3929 line_ptr += bytes_read;
3930 if ((files.num_files % FILE_ALLOC_CHUNK) == 0)
3932 files.files = (struct fileinfo *)
3933 xrealloc (files.files,
3934 (files.num_files + FILE_ALLOC_CHUNK)
3935 * sizeof (struct fileinfo));
3936 if (files.num_files == 0)
3937 make_cleanup (free_current_contents, &files.files);
3939 files.files[files.num_files].name = cur_file;
3940 files.files[files.num_files].dir =
3941 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3942 line_ptr += bytes_read;
3943 files.files[files.num_files].time =
3944 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3945 line_ptr += bytes_read;
3946 files.files[files.num_files].size =
3947 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3948 line_ptr += bytes_read;
3952 complain (&dwarf2_mangled_line_number_section);
3957 record_line (current_subfile, line, address);
3960 case DW_LNS_advance_pc:
3961 address += lh.minimum_instruction_length
3962 * read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3963 line_ptr += bytes_read;
3965 case DW_LNS_advance_line:
3966 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
3967 line_ptr += bytes_read;
3969 case DW_LNS_set_file:
3970 /* The file and directory tables are 0 based, the references
3972 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3973 line_ptr += bytes_read;
3974 dwarf2_start_subfile
3975 (files.files[file - 1].name,
3976 (files.files[file - 1].dir
3977 ? dirs.dirs[files.files[file - 1].dir - 1]
3980 case DW_LNS_set_column:
3981 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3982 line_ptr += bytes_read;
3984 case DW_LNS_negate_stmt:
3985 is_stmt = (!is_stmt);
3987 case DW_LNS_set_basic_block:
3990 case DW_LNS_const_add_pc:
3991 address += (255 - lh.opcode_base) / lh.line_range;
3993 case DW_LNS_fixed_advance_pc:
3994 address += read_2_bytes (abfd, line_ptr);
3997 default: /* special operand */
3998 adj_opcode = op_code - lh.opcode_base;
3999 address += (adj_opcode / lh.line_range)
4000 * lh.minimum_instruction_length;
4001 line += lh.line_base + (adj_opcode % lh.line_range);
4002 /* append row to matrix using current values */
4003 record_line (current_subfile, line, address);
4009 do_cleanups (back_to);
4012 /* Start a subfile for DWARF. FILENAME is the name of the file and
4013 DIRNAME the name of the source directory which contains FILENAME
4014 or NULL if not known.
4015 This routine tries to keep line numbers from identical absolute and
4016 relative file names in a common subfile.
4018 Using the `list' example from the GDB testsuite, which resides in
4019 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
4020 of /srcdir/list0.c yields the following debugging information for list0.c:
4022 DW_AT_name: /srcdir/list0.c
4023 DW_AT_comp_dir: /compdir
4024 files.files[0].name: list0.h
4025 files.files[0].dir: /srcdir
4026 files.files[1].name: list0.c
4027 files.files[1].dir: /srcdir
4029 The line number information for list0.c has to end up in a single
4030 subfile, so that `break /srcdir/list0.c:1' works as expected. */
4033 dwarf2_start_subfile (filename, dirname)
4037 /* If the filename isn't absolute, try to match an existing subfile
4038 with the full pathname. */
4040 if (*filename != '/' && dirname != NULL)
4042 struct subfile *subfile;
4043 char *fullname = concat (dirname, "/", filename, NULL);
4045 for (subfile = subfiles; subfile; subfile = subfile->next)
4047 if (STREQ (subfile->name, fullname))
4049 current_subfile = subfile;
4056 start_subfile (filename, dirname);
4059 /* Given a pointer to a DWARF information entry, figure out if we need
4060 to make a symbol table entry for it, and if so, create a new entry
4061 and return a pointer to it.
4062 If TYPE is NULL, determine symbol type from the die, otherwise
4063 used the passed type.
4066 static struct symbol *
4067 new_symbol (die, type, objfile)
4068 struct die_info *die;
4070 struct objfile *objfile;
4072 struct symbol *sym = NULL;
4074 struct attribute *attr = NULL;
4075 struct attribute *attr2 = NULL;
4078 name = dwarf2_linkage_name (die);
4081 sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack,
4082 sizeof (struct symbol));
4083 OBJSTAT (objfile, n_syms++);
4084 memset (sym, 0, sizeof (struct symbol));
4085 SYMBOL_NAME (sym) = obsavestring (name, strlen (name),
4086 &objfile->symbol_obstack);
4088 /* Default assumptions.
4089 Use the passed type or decode it from the die. */
4090 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
4091 SYMBOL_CLASS (sym) = LOC_STATIC;
4093 SYMBOL_TYPE (sym) = type;
4095 SYMBOL_TYPE (sym) = die_type (die, objfile);
4096 attr = dwarf_attr (die, DW_AT_decl_line);
4099 SYMBOL_LINE (sym) = DW_UNSND (attr);
4102 /* If this symbol is from a C++ compilation, then attempt to
4103 cache the demangled form for future reference. This is a
4104 typical time versus space tradeoff, that was decided in favor
4105 of time because it sped up C++ symbol lookups by a factor of
4108 SYMBOL_LANGUAGE (sym) = cu_language;
4109 SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack);
4113 attr = dwarf_attr (die, DW_AT_low_pc);
4116 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
4118 SYMBOL_CLASS (sym) = LOC_LABEL;
4120 case DW_TAG_subprogram:
4121 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
4123 SYMBOL_CLASS (sym) = LOC_BLOCK;
4124 attr2 = dwarf_attr (die, DW_AT_external);
4125 if (attr2 && (DW_UNSND (attr2) != 0))
4127 add_symbol_to_list (sym, &global_symbols);
4131 add_symbol_to_list (sym, list_in_scope);
4134 case DW_TAG_variable:
4135 /* Compilation with minimal debug info may result in variables
4136 with missing type entries. Change the misleading `void' type
4137 to something sensible. */
4138 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
4139 SYMBOL_TYPE (sym) = init_type (TYPE_CODE_INT,
4140 TARGET_INT_BIT / HOST_CHAR_BIT, 0,
4141 "<variable, no debug info>",
4143 attr = dwarf_attr (die, DW_AT_const_value);
4146 dwarf2_const_value (attr, sym, objfile);
4147 attr2 = dwarf_attr (die, DW_AT_external);
4148 if (attr2 && (DW_UNSND (attr2) != 0))
4149 add_symbol_to_list (sym, &global_symbols);
4151 add_symbol_to_list (sym, list_in_scope);
4154 attr = dwarf_attr (die, DW_AT_location);
4157 attr2 = dwarf_attr (die, DW_AT_external);
4158 if (attr2 && (DW_UNSND (attr2) != 0))
4160 SYMBOL_VALUE_ADDRESS (sym) =
4161 decode_locdesc (DW_BLOCK (attr), objfile);
4162 add_symbol_to_list (sym, &global_symbols);
4164 /* In shared libraries the address of the variable
4165 in the location descriptor might still be relocatable,
4166 so its value could be zero.
4167 Enter the symbol as a LOC_UNRESOLVED symbol, if its
4168 value is zero, the address of the variable will then
4169 be determined from the minimal symbol table whenever
4170 the variable is referenced. */
4171 if (SYMBOL_VALUE_ADDRESS (sym))
4173 SYMBOL_VALUE_ADDRESS (sym) += baseaddr;
4174 SYMBOL_CLASS (sym) = LOC_STATIC;
4177 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
4181 SYMBOL_VALUE (sym) = addr =
4182 decode_locdesc (DW_BLOCK (attr), objfile);
4183 add_symbol_to_list (sym, list_in_scope);
4186 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
4190 SYMBOL_CLASS (sym) = LOC_REGISTER;
4194 SYMBOL_CLASS (sym) = LOC_BASEREG;
4195 SYMBOL_BASEREG (sym) = basereg;
4199 SYMBOL_CLASS (sym) = LOC_LOCAL;
4203 SYMBOL_CLASS (sym) = LOC_STATIC;
4204 SYMBOL_VALUE_ADDRESS (sym) = addr + baseaddr;
4210 /* We do not know the address of this symbol.
4211 If it is an external symbol and we have type information
4212 for it, enter the symbol as a LOC_UNRESOLVED symbol.
4213 The address of the variable will then be determined from
4214 the minimal symbol table whenever the variable is
4216 attr2 = dwarf_attr (die, DW_AT_external);
4217 if (attr2 && (DW_UNSND (attr2) != 0)
4218 && dwarf_attr (die, DW_AT_type) != NULL)
4220 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
4221 add_symbol_to_list (sym, &global_symbols);
4225 case DW_TAG_formal_parameter:
4226 attr = dwarf_attr (die, DW_AT_location);
4229 SYMBOL_VALUE (sym) = decode_locdesc (DW_BLOCK (attr), objfile);
4232 SYMBOL_CLASS (sym) = LOC_REGPARM;
4236 SYMBOL_CLASS (sym) = LOC_BASEREG_ARG;
4237 SYMBOL_BASEREG (sym) = basereg;
4241 SYMBOL_CLASS (sym) = LOC_ARG;
4244 attr = dwarf_attr (die, DW_AT_const_value);
4247 dwarf2_const_value (attr, sym, objfile);
4249 add_symbol_to_list (sym, list_in_scope);
4251 case DW_TAG_unspecified_parameters:
4252 /* From varargs functions; gdb doesn't seem to have any
4253 interest in this information, so just ignore it for now.
4256 case DW_TAG_class_type:
4257 case DW_TAG_structure_type:
4258 case DW_TAG_union_type:
4259 case DW_TAG_enumeration_type:
4260 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
4261 SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
4262 add_symbol_to_list (sym, list_in_scope);
4264 /* The semantics of C++ state that "struct foo { ... }" also
4265 defines a typedef for "foo". Synthesize a typedef symbol so
4266 that "ptype foo" works as expected. */
4267 if (cu_language == language_cplus)
4269 struct symbol *typedef_sym = (struct symbol *)
4270 obstack_alloc (&objfile->symbol_obstack,
4271 sizeof (struct symbol));
4272 *typedef_sym = *sym;
4273 SYMBOL_NAMESPACE (typedef_sym) = VAR_NAMESPACE;
4274 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
4275 TYPE_NAME (SYMBOL_TYPE (sym)) =
4276 obsavestring (SYMBOL_NAME (sym),
4277 strlen (SYMBOL_NAME (sym)),
4278 &objfile->type_obstack);
4279 add_symbol_to_list (typedef_sym, list_in_scope);
4282 case DW_TAG_typedef:
4283 case DW_TAG_base_type:
4284 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
4285 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
4286 add_symbol_to_list (sym, list_in_scope);
4288 case DW_TAG_enumerator:
4289 attr = dwarf_attr (die, DW_AT_const_value);
4292 dwarf2_const_value (attr, sym, objfile);
4294 add_symbol_to_list (sym, list_in_scope);
4297 /* Not a tag we recognize. Hopefully we aren't processing
4298 trash data, but since we must specifically ignore things
4299 we don't recognize, there is nothing else we should do at
4301 complain (&dwarf2_unsupported_tag, dwarf_tag_name (die->tag));
4308 /* Copy constant value from an attribute to a symbol. */
4311 dwarf2_const_value (attr, sym, objfile)
4312 struct attribute *attr;
4314 struct objfile *objfile;
4316 struct dwarf_block *blk;
4321 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != (unsigned int) address_size)
4322 complain (&dwarf2_const_value_length_mismatch, SYMBOL_NAME (sym),
4323 address_size, TYPE_LENGTH (SYMBOL_TYPE (sym)));
4324 SYMBOL_VALUE_BYTES (sym) = (char *)
4325 obstack_alloc (&objfile->symbol_obstack, address_size);
4326 store_address (SYMBOL_VALUE_BYTES (sym), address_size, DW_ADDR (attr));
4327 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
4329 case DW_FORM_block1:
4330 case DW_FORM_block2:
4331 case DW_FORM_block4:
4333 blk = DW_BLOCK (attr);
4334 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
4335 complain (&dwarf2_const_value_length_mismatch, SYMBOL_NAME (sym),
4336 blk->size, TYPE_LENGTH (SYMBOL_TYPE (sym)));
4337 SYMBOL_VALUE_BYTES (sym) = (char *)
4338 obstack_alloc (&objfile->symbol_obstack, blk->size);
4339 memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
4340 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
4348 SYMBOL_VALUE (sym) = DW_UNSND (attr);
4349 SYMBOL_CLASS (sym) = LOC_CONST;
4352 complain (&dwarf2_unsupported_const_value_attr,
4353 dwarf_form_name (attr->form));
4354 SYMBOL_VALUE (sym) = 0;
4355 SYMBOL_CLASS (sym) = LOC_CONST;
4360 /* Return the type of the die in question using its DW_AT_type attribute. */
4362 static struct type *
4363 die_type (die, objfile)
4364 struct die_info *die;
4365 struct objfile *objfile;
4368 struct attribute *type_attr;
4369 struct die_info *type_die;
4372 type_attr = dwarf_attr (die, DW_AT_type);
4375 /* A missing DW_AT_type represents a void type. */
4376 return dwarf2_fundamental_type (objfile, FT_VOID);
4380 ref = dwarf2_get_ref_die_offset (type_attr);
4381 type_die = follow_die_ref (ref);
4384 error ("Dwarf Error: Cannot find referent at offset %d.", ref);
4388 type = tag_type_to_type (type_die, objfile);
4391 dump_die (type_die);
4392 error ("Dwarf Error: Problem turning type die at offset into gdb type.");
4397 /* Return the containing type of the die in question using its
4398 DW_AT_containing_type attribute. */
4400 static struct type *
4401 die_containing_type (die, objfile)
4402 struct die_info *die;
4403 struct objfile *objfile;
4405 struct type *type = NULL;
4406 struct attribute *type_attr;
4407 struct die_info *type_die = NULL;
4410 type_attr = dwarf_attr (die, DW_AT_containing_type);
4413 ref = dwarf2_get_ref_die_offset (type_attr);
4414 type_die = follow_die_ref (ref);
4417 error ("Dwarf Error: Cannot find referent at offset %d.", ref);
4420 type = tag_type_to_type (type_die, objfile);
4425 dump_die (type_die);
4426 error ("Dwarf Error: Problem turning containing type into gdb type.");
4432 static struct type *
4433 type_at_offset (offset, objfile)
4434 unsigned int offset;
4435 struct objfile *objfile;
4437 struct die_info *die;
4440 die = follow_die_ref (offset);
4443 error ("Dwarf Error: Cannot find type referent at offset %d.", offset);
4446 type = tag_type_to_type (die, objfile);
4451 static struct type *
4452 tag_type_to_type (die, objfile)
4453 struct die_info *die;
4454 struct objfile *objfile;
4462 read_type_die (die, objfile);
4466 error ("Dwarf Error: Cannot find type of die.");
4473 read_type_die (die, objfile)
4474 struct die_info *die;
4475 struct objfile *objfile;
4479 case DW_TAG_class_type:
4480 case DW_TAG_structure_type:
4481 case DW_TAG_union_type:
4482 read_structure_scope (die, objfile);
4484 case DW_TAG_enumeration_type:
4485 read_enumeration (die, objfile);
4487 case DW_TAG_subprogram:
4488 case DW_TAG_subroutine_type:
4489 read_subroutine_type (die, objfile);
4491 case DW_TAG_array_type:
4492 read_array_type (die, objfile);
4494 case DW_TAG_pointer_type:
4495 read_tag_pointer_type (die, objfile);
4497 case DW_TAG_ptr_to_member_type:
4498 read_tag_ptr_to_member_type (die, objfile);
4500 case DW_TAG_reference_type:
4501 read_tag_reference_type (die, objfile);
4503 case DW_TAG_const_type:
4504 read_tag_const_type (die, objfile);
4506 case DW_TAG_volatile_type:
4507 read_tag_volatile_type (die, objfile);
4509 case DW_TAG_string_type:
4510 read_tag_string_type (die, objfile);
4512 case DW_TAG_typedef:
4513 read_typedef (die, objfile);
4515 case DW_TAG_base_type:
4516 read_base_type (die, objfile);
4519 complain (&dwarf2_unexpected_tag, dwarf_tag_name (die->tag));
4524 static struct type *
4525 dwarf_base_type (encoding, size, objfile)
4528 struct objfile *objfile;
4530 /* FIXME - this should not produce a new (struct type *)
4531 every time. It should cache base types. */
4535 case DW_ATE_address:
4536 type = dwarf2_fundamental_type (objfile, FT_VOID);
4538 case DW_ATE_boolean:
4539 type = dwarf2_fundamental_type (objfile, FT_BOOLEAN);
4541 case DW_ATE_complex_float:
4544 type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_COMPLEX);
4548 type = dwarf2_fundamental_type (objfile, FT_COMPLEX);
4554 type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT);
4558 type = dwarf2_fundamental_type (objfile, FT_FLOAT);
4565 type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR);
4568 type = dwarf2_fundamental_type (objfile, FT_SIGNED_SHORT);
4572 type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER);
4576 case DW_ATE_signed_char:
4577 type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR);
4579 case DW_ATE_unsigned:
4583 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR);
4586 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_SHORT);
4590 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_INTEGER);
4594 case DW_ATE_unsigned_char:
4595 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR);
4598 type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER);
4606 struct die_info *old_die;
4608 struct die_info *new_die;
4611 new_die = (struct die_info *) xmalloc (sizeof (struct die_info));
4612 memset (new_die, 0, sizeof (struct die_info));
4614 new_die->tag = old_die->tag;
4615 new_die->has_children = old_die->has_children;
4616 new_die->abbrev = old_die->abbrev;
4617 new_die->offset = old_die->offset;
4618 new_die->type = NULL;
4620 num_attrs = old_die->num_attrs;
4621 new_die->num_attrs = num_attrs;
4622 new_die->attrs = (struct attribute *)
4623 xmalloc (num_attrs * sizeof (struct attribute));
4625 for (i = 0; i < old_die->num_attrs; ++i)
4627 new_die->attrs[i].name = old_die->attrs[i].name;
4628 new_die->attrs[i].form = old_die->attrs[i].form;
4629 new_die->attrs[i].u.addr = old_die->attrs[i].u.addr;
4632 new_die->next = NULL;
4637 /* Return sibling of die, NULL if no sibling. */
4641 struct die_info *die;
4643 int nesting_level = 0;
4645 if (!die->has_children)
4647 if (die->next && (die->next->tag == 0))
4660 if (die->has_children)
4670 while (nesting_level);
4671 if (die && (die->tag == 0))
4682 /* Get linkage name of a die, return NULL if not found. */
4685 dwarf2_linkage_name (die)
4686 struct die_info *die;
4688 struct attribute *attr;
4690 attr = dwarf_attr (die, DW_AT_MIPS_linkage_name);
4691 if (attr && DW_STRING (attr))
4692 return DW_STRING (attr);
4693 attr = dwarf_attr (die, DW_AT_name);
4694 if (attr && DW_STRING (attr))
4695 return DW_STRING (attr);
4699 /* Convert a DIE tag into its string name. */
4702 dwarf_tag_name (tag)
4703 register unsigned tag;
4707 case DW_TAG_padding:
4708 return "DW_TAG_padding";
4709 case DW_TAG_array_type:
4710 return "DW_TAG_array_type";
4711 case DW_TAG_class_type:
4712 return "DW_TAG_class_type";
4713 case DW_TAG_entry_point:
4714 return "DW_TAG_entry_point";
4715 case DW_TAG_enumeration_type:
4716 return "DW_TAG_enumeration_type";
4717 case DW_TAG_formal_parameter:
4718 return "DW_TAG_formal_parameter";
4719 case DW_TAG_imported_declaration:
4720 return "DW_TAG_imported_declaration";
4722 return "DW_TAG_label";
4723 case DW_TAG_lexical_block:
4724 return "DW_TAG_lexical_block";
4726 return "DW_TAG_member";
4727 case DW_TAG_pointer_type:
4728 return "DW_TAG_pointer_type";
4729 case DW_TAG_reference_type:
4730 return "DW_TAG_reference_type";
4731 case DW_TAG_compile_unit:
4732 return "DW_TAG_compile_unit";
4733 case DW_TAG_string_type:
4734 return "DW_TAG_string_type";
4735 case DW_TAG_structure_type:
4736 return "DW_TAG_structure_type";
4737 case DW_TAG_subroutine_type:
4738 return "DW_TAG_subroutine_type";
4739 case DW_TAG_typedef:
4740 return "DW_TAG_typedef";
4741 case DW_TAG_union_type:
4742 return "DW_TAG_union_type";
4743 case DW_TAG_unspecified_parameters:
4744 return "DW_TAG_unspecified_parameters";
4745 case DW_TAG_variant:
4746 return "DW_TAG_variant";
4747 case DW_TAG_common_block:
4748 return "DW_TAG_common_block";
4749 case DW_TAG_common_inclusion:
4750 return "DW_TAG_common_inclusion";
4751 case DW_TAG_inheritance:
4752 return "DW_TAG_inheritance";
4753 case DW_TAG_inlined_subroutine:
4754 return "DW_TAG_inlined_subroutine";
4756 return "DW_TAG_module";
4757 case DW_TAG_ptr_to_member_type:
4758 return "DW_TAG_ptr_to_member_type";
4759 case DW_TAG_set_type:
4760 return "DW_TAG_set_type";
4761 case DW_TAG_subrange_type:
4762 return "DW_TAG_subrange_type";
4763 case DW_TAG_with_stmt:
4764 return "DW_TAG_with_stmt";
4765 case DW_TAG_access_declaration:
4766 return "DW_TAG_access_declaration";
4767 case DW_TAG_base_type:
4768 return "DW_TAG_base_type";
4769 case DW_TAG_catch_block:
4770 return "DW_TAG_catch_block";
4771 case DW_TAG_const_type:
4772 return "DW_TAG_const_type";
4773 case DW_TAG_constant:
4774 return "DW_TAG_constant";
4775 case DW_TAG_enumerator:
4776 return "DW_TAG_enumerator";
4777 case DW_TAG_file_type:
4778 return "DW_TAG_file_type";
4780 return "DW_TAG_friend";
4781 case DW_TAG_namelist:
4782 return "DW_TAG_namelist";
4783 case DW_TAG_namelist_item:
4784 return "DW_TAG_namelist_item";
4785 case DW_TAG_packed_type:
4786 return "DW_TAG_packed_type";
4787 case DW_TAG_subprogram:
4788 return "DW_TAG_subprogram";
4789 case DW_TAG_template_type_param:
4790 return "DW_TAG_template_type_param";
4791 case DW_TAG_template_value_param:
4792 return "DW_TAG_template_value_param";
4793 case DW_TAG_thrown_type:
4794 return "DW_TAG_thrown_type";
4795 case DW_TAG_try_block:
4796 return "DW_TAG_try_block";
4797 case DW_TAG_variant_part:
4798 return "DW_TAG_variant_part";
4799 case DW_TAG_variable:
4800 return "DW_TAG_variable";
4801 case DW_TAG_volatile_type:
4802 return "DW_TAG_volatile_type";
4803 case DW_TAG_MIPS_loop:
4804 return "DW_TAG_MIPS_loop";
4805 case DW_TAG_format_label:
4806 return "DW_TAG_format_label";
4807 case DW_TAG_function_template:
4808 return "DW_TAG_function_template";
4809 case DW_TAG_class_template:
4810 return "DW_TAG_class_template";
4812 return "DW_TAG_<unknown>";
4816 /* Convert a DWARF attribute code into its string name. */
4819 dwarf_attr_name (attr)
4820 register unsigned attr;
4825 return "DW_AT_sibling";
4826 case DW_AT_location:
4827 return "DW_AT_location";
4829 return "DW_AT_name";
4830 case DW_AT_ordering:
4831 return "DW_AT_ordering";
4832 case DW_AT_subscr_data:
4833 return "DW_AT_subscr_data";
4834 case DW_AT_byte_size:
4835 return "DW_AT_byte_size";
4836 case DW_AT_bit_offset:
4837 return "DW_AT_bit_offset";
4838 case DW_AT_bit_size:
4839 return "DW_AT_bit_size";
4840 case DW_AT_element_list:
4841 return "DW_AT_element_list";
4842 case DW_AT_stmt_list:
4843 return "DW_AT_stmt_list";
4845 return "DW_AT_low_pc";
4847 return "DW_AT_high_pc";
4848 case DW_AT_language:
4849 return "DW_AT_language";
4851 return "DW_AT_member";
4853 return "DW_AT_discr";
4854 case DW_AT_discr_value:
4855 return "DW_AT_discr_value";
4856 case DW_AT_visibility:
4857 return "DW_AT_visibility";
4859 return "DW_AT_import";
4860 case DW_AT_string_length:
4861 return "DW_AT_string_length";
4862 case DW_AT_common_reference:
4863 return "DW_AT_common_reference";
4864 case DW_AT_comp_dir:
4865 return "DW_AT_comp_dir";
4866 case DW_AT_const_value:
4867 return "DW_AT_const_value";
4868 case DW_AT_containing_type:
4869 return "DW_AT_containing_type";
4870 case DW_AT_default_value:
4871 return "DW_AT_default_value";
4873 return "DW_AT_inline";
4874 case DW_AT_is_optional:
4875 return "DW_AT_is_optional";
4876 case DW_AT_lower_bound:
4877 return "DW_AT_lower_bound";
4878 case DW_AT_producer:
4879 return "DW_AT_producer";
4880 case DW_AT_prototyped:
4881 return "DW_AT_prototyped";
4882 case DW_AT_return_addr:
4883 return "DW_AT_return_addr";
4884 case DW_AT_start_scope:
4885 return "DW_AT_start_scope";
4886 case DW_AT_stride_size:
4887 return "DW_AT_stride_size";
4888 case DW_AT_upper_bound:
4889 return "DW_AT_upper_bound";
4890 case DW_AT_abstract_origin:
4891 return "DW_AT_abstract_origin";
4892 case DW_AT_accessibility:
4893 return "DW_AT_accessibility";
4894 case DW_AT_address_class:
4895 return "DW_AT_address_class";
4896 case DW_AT_artificial:
4897 return "DW_AT_artificial";
4898 case DW_AT_base_types:
4899 return "DW_AT_base_types";
4900 case DW_AT_calling_convention:
4901 return "DW_AT_calling_convention";
4903 return "DW_AT_count";
4904 case DW_AT_data_member_location:
4905 return "DW_AT_data_member_location";
4906 case DW_AT_decl_column:
4907 return "DW_AT_decl_column";
4908 case DW_AT_decl_file:
4909 return "DW_AT_decl_file";
4910 case DW_AT_decl_line:
4911 return "DW_AT_decl_line";
4912 case DW_AT_declaration:
4913 return "DW_AT_declaration";
4914 case DW_AT_discr_list:
4915 return "DW_AT_discr_list";
4916 case DW_AT_encoding:
4917 return "DW_AT_encoding";
4918 case DW_AT_external:
4919 return "DW_AT_external";
4920 case DW_AT_frame_base:
4921 return "DW_AT_frame_base";
4923 return "DW_AT_friend";
4924 case DW_AT_identifier_case:
4925 return "DW_AT_identifier_case";
4926 case DW_AT_macro_info:
4927 return "DW_AT_macro_info";
4928 case DW_AT_namelist_items:
4929 return "DW_AT_namelist_items";
4930 case DW_AT_priority:
4931 return "DW_AT_priority";
4933 return "DW_AT_segment";
4934 case DW_AT_specification:
4935 return "DW_AT_specification";
4936 case DW_AT_static_link:
4937 return "DW_AT_static_link";
4939 return "DW_AT_type";
4940 case DW_AT_use_location:
4941 return "DW_AT_use_location";
4942 case DW_AT_variable_parameter:
4943 return "DW_AT_variable_parameter";
4944 case DW_AT_virtuality:
4945 return "DW_AT_virtuality";
4946 case DW_AT_vtable_elem_location:
4947 return "DW_AT_vtable_elem_location";
4950 case DW_AT_MIPS_fde:
4951 return "DW_AT_MIPS_fde";
4952 case DW_AT_MIPS_loop_begin:
4953 return "DW_AT_MIPS_loop_begin";
4954 case DW_AT_MIPS_tail_loop_begin:
4955 return "DW_AT_MIPS_tail_loop_begin";
4956 case DW_AT_MIPS_epilog_begin:
4957 return "DW_AT_MIPS_epilog_begin";
4958 case DW_AT_MIPS_loop_unroll_factor:
4959 return "DW_AT_MIPS_loop_unroll_factor";
4960 case DW_AT_MIPS_software_pipeline_depth:
4961 return "DW_AT_MIPS_software_pipeline_depth";
4962 case DW_AT_MIPS_linkage_name:
4963 return "DW_AT_MIPS_linkage_name";
4966 case DW_AT_sf_names:
4967 return "DW_AT_sf_names";
4968 case DW_AT_src_info:
4969 return "DW_AT_src_info";
4970 case DW_AT_mac_info:
4971 return "DW_AT_mac_info";
4972 case DW_AT_src_coords:
4973 return "DW_AT_src_coords";
4974 case DW_AT_body_begin:
4975 return "DW_AT_body_begin";
4976 case DW_AT_body_end:
4977 return "DW_AT_body_end";
4979 return "DW_AT_<unknown>";
4983 /* Convert a DWARF value form code into its string name. */
4986 dwarf_form_name (form)
4987 register unsigned form;
4992 return "DW_FORM_addr";
4993 case DW_FORM_block2:
4994 return "DW_FORM_block2";
4995 case DW_FORM_block4:
4996 return "DW_FORM_block4";
4998 return "DW_FORM_data2";
5000 return "DW_FORM_data4";
5002 return "DW_FORM_data8";
5003 case DW_FORM_string:
5004 return "DW_FORM_string";
5006 return "DW_FORM_block";
5007 case DW_FORM_block1:
5008 return "DW_FORM_block1";
5010 return "DW_FORM_data1";
5012 return "DW_FORM_flag";
5014 return "DW_FORM_sdata";
5016 return "DW_FORM_strp";
5018 return "DW_FORM_udata";
5019 case DW_FORM_ref_addr:
5020 return "DW_FORM_ref_addr";
5022 return "DW_FORM_ref1";
5024 return "DW_FORM_ref2";
5026 return "DW_FORM_ref4";
5028 return "DW_FORM_ref8";
5029 case DW_FORM_ref_udata:
5030 return "DW_FORM_ref_udata";
5031 case DW_FORM_indirect:
5032 return "DW_FORM_indirect";
5034 return "DW_FORM_<unknown>";
5038 /* Convert a DWARF stack opcode into its string name. */
5041 dwarf_stack_op_name (op)
5042 register unsigned op;
5047 return "DW_OP_addr";
5049 return "DW_OP_deref";
5051 return "DW_OP_const1u";
5053 return "DW_OP_const1s";
5055 return "DW_OP_const2u";
5057 return "DW_OP_const2s";
5059 return "DW_OP_const4u";
5061 return "DW_OP_const4s";
5063 return "DW_OP_const8u";
5065 return "DW_OP_const8s";
5067 return "DW_OP_constu";
5069 return "DW_OP_consts";
5073 return "DW_OP_drop";
5075 return "DW_OP_over";
5077 return "DW_OP_pick";
5079 return "DW_OP_swap";
5083 return "DW_OP_xderef";
5091 return "DW_OP_minus";
5103 return "DW_OP_plus";
5104 case DW_OP_plus_uconst:
5105 return "DW_OP_plus_uconst";
5111 return "DW_OP_shra";
5129 return "DW_OP_skip";
5131 return "DW_OP_lit0";
5133 return "DW_OP_lit1";
5135 return "DW_OP_lit2";
5137 return "DW_OP_lit3";
5139 return "DW_OP_lit4";
5141 return "DW_OP_lit5";
5143 return "DW_OP_lit6";
5145 return "DW_OP_lit7";
5147 return "DW_OP_lit8";
5149 return "DW_OP_lit9";
5151 return "DW_OP_lit10";
5153 return "DW_OP_lit11";
5155 return "DW_OP_lit12";
5157 return "DW_OP_lit13";
5159 return "DW_OP_lit14";
5161 return "DW_OP_lit15";
5163 return "DW_OP_lit16";
5165 return "DW_OP_lit17";
5167 return "DW_OP_lit18";
5169 return "DW_OP_lit19";
5171 return "DW_OP_lit20";
5173 return "DW_OP_lit21";
5175 return "DW_OP_lit22";
5177 return "DW_OP_lit23";
5179 return "DW_OP_lit24";
5181 return "DW_OP_lit25";
5183 return "DW_OP_lit26";
5185 return "DW_OP_lit27";
5187 return "DW_OP_lit28";
5189 return "DW_OP_lit29";
5191 return "DW_OP_lit30";
5193 return "DW_OP_lit31";
5195 return "DW_OP_reg0";
5197 return "DW_OP_reg1";
5199 return "DW_OP_reg2";
5201 return "DW_OP_reg3";
5203 return "DW_OP_reg4";
5205 return "DW_OP_reg5";
5207 return "DW_OP_reg6";
5209 return "DW_OP_reg7";
5211 return "DW_OP_reg8";
5213 return "DW_OP_reg9";
5215 return "DW_OP_reg10";
5217 return "DW_OP_reg11";
5219 return "DW_OP_reg12";
5221 return "DW_OP_reg13";
5223 return "DW_OP_reg14";
5225 return "DW_OP_reg15";
5227 return "DW_OP_reg16";
5229 return "DW_OP_reg17";
5231 return "DW_OP_reg18";
5233 return "DW_OP_reg19";
5235 return "DW_OP_reg20";
5237 return "DW_OP_reg21";
5239 return "DW_OP_reg22";
5241 return "DW_OP_reg23";
5243 return "DW_OP_reg24";
5245 return "DW_OP_reg25";
5247 return "DW_OP_reg26";
5249 return "DW_OP_reg27";
5251 return "DW_OP_reg28";
5253 return "DW_OP_reg29";
5255 return "DW_OP_reg30";
5257 return "DW_OP_reg31";
5259 return "DW_OP_breg0";
5261 return "DW_OP_breg1";
5263 return "DW_OP_breg2";
5265 return "DW_OP_breg3";
5267 return "DW_OP_breg4";
5269 return "DW_OP_breg5";
5271 return "DW_OP_breg6";
5273 return "DW_OP_breg7";
5275 return "DW_OP_breg8";
5277 return "DW_OP_breg9";
5279 return "DW_OP_breg10";
5281 return "DW_OP_breg11";
5283 return "DW_OP_breg12";
5285 return "DW_OP_breg13";
5287 return "DW_OP_breg14";
5289 return "DW_OP_breg15";
5291 return "DW_OP_breg16";
5293 return "DW_OP_breg17";
5295 return "DW_OP_breg18";
5297 return "DW_OP_breg19";
5299 return "DW_OP_breg20";
5301 return "DW_OP_breg21";
5303 return "DW_OP_breg22";
5305 return "DW_OP_breg23";
5307 return "DW_OP_breg24";
5309 return "DW_OP_breg25";
5311 return "DW_OP_breg26";
5313 return "DW_OP_breg27";
5315 return "DW_OP_breg28";
5317 return "DW_OP_breg29";
5319 return "DW_OP_breg30";
5321 return "DW_OP_breg31";
5323 return "DW_OP_regx";
5325 return "DW_OP_fbreg";
5327 return "DW_OP_bregx";
5329 return "DW_OP_piece";
5330 case DW_OP_deref_size:
5331 return "DW_OP_deref_size";
5332 case DW_OP_xderef_size:
5333 return "DW_OP_xderef_size";
5337 return "OP_<unknown>";
5342 dwarf_bool_name (bool)
5351 /* Convert a DWARF type code into its string name. */
5354 dwarf_type_encoding_name (enc)
5355 register unsigned enc;
5359 case DW_ATE_address:
5360 return "DW_ATE_address";
5361 case DW_ATE_boolean:
5362 return "DW_ATE_boolean";
5363 case DW_ATE_complex_float:
5364 return "DW_ATE_complex_float";
5366 return "DW_ATE_float";
5368 return "DW_ATE_signed";
5369 case DW_ATE_signed_char:
5370 return "DW_ATE_signed_char";
5371 case DW_ATE_unsigned:
5372 return "DW_ATE_unsigned";
5373 case DW_ATE_unsigned_char:
5374 return "DW_ATE_unsigned_char";
5376 return "DW_ATE_<unknown>";
5380 /* Convert a DWARF call frame info operation to its string name. */
5384 dwarf_cfi_name (cfi_opc)
5385 register unsigned cfi_opc;
5389 case DW_CFA_advance_loc:
5390 return "DW_CFA_advance_loc";
5392 return "DW_CFA_offset";
5393 case DW_CFA_restore:
5394 return "DW_CFA_restore";
5396 return "DW_CFA_nop";
5397 case DW_CFA_set_loc:
5398 return "DW_CFA_set_loc";
5399 case DW_CFA_advance_loc1:
5400 return "DW_CFA_advance_loc1";
5401 case DW_CFA_advance_loc2:
5402 return "DW_CFA_advance_loc2";
5403 case DW_CFA_advance_loc4:
5404 return "DW_CFA_advance_loc4";
5405 case DW_CFA_offset_extended:
5406 return "DW_CFA_offset_extended";
5407 case DW_CFA_restore_extended:
5408 return "DW_CFA_restore_extended";
5409 case DW_CFA_undefined:
5410 return "DW_CFA_undefined";
5411 case DW_CFA_same_value:
5412 return "DW_CFA_same_value";
5413 case DW_CFA_register:
5414 return "DW_CFA_register";
5415 case DW_CFA_remember_state:
5416 return "DW_CFA_remember_state";
5417 case DW_CFA_restore_state:
5418 return "DW_CFA_restore_state";
5419 case DW_CFA_def_cfa:
5420 return "DW_CFA_def_cfa";
5421 case DW_CFA_def_cfa_register:
5422 return "DW_CFA_def_cfa_register";
5423 case DW_CFA_def_cfa_offset:
5424 return "DW_CFA_def_cfa_offset";
5425 /* SGI/MIPS specific */
5426 case DW_CFA_MIPS_advance_loc8:
5427 return "DW_CFA_MIPS_advance_loc8";
5429 return "DW_CFA_<unknown>";
5436 struct die_info *die;
5440 fprintf (stderr, "Die: %s (abbrev = %d, offset = %d)\n",
5441 dwarf_tag_name (die->tag), die->abbrev, die->offset);
5442 fprintf (stderr, "\thas children: %s\n",
5443 dwarf_bool_name (die->has_children));
5445 fprintf (stderr, "\tattributes:\n");
5446 for (i = 0; i < die->num_attrs; ++i)
5448 fprintf (stderr, "\t\t%s (%s) ",
5449 dwarf_attr_name (die->attrs[i].name),
5450 dwarf_form_name (die->attrs[i].form));
5451 switch (die->attrs[i].form)
5453 case DW_FORM_ref_addr:
5455 fprintf (stderr, "address: ");
5456 print_address_numeric (DW_ADDR (&die->attrs[i]), 1, stderr);
5458 case DW_FORM_block2:
5459 case DW_FORM_block4:
5461 case DW_FORM_block1:
5462 fprintf (stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
5472 fprintf (stderr, "constant: %d", DW_UNSND (&die->attrs[i]));
5474 case DW_FORM_string:
5475 fprintf (stderr, "string: \"%s\"",
5476 DW_STRING (&die->attrs[i])
5477 ? DW_STRING (&die->attrs[i]) : "");
5480 if (DW_UNSND (&die->attrs[i]))
5481 fprintf (stderr, "flag: TRUE");
5483 fprintf (stderr, "flag: FALSE");
5485 case DW_FORM_strp: /* we do not support separate string
5487 case DW_FORM_indirect: /* we do not handle indirect yet */
5488 case DW_FORM_data8: /* we do not have 64 bit quantities */
5490 fprintf (stderr, "unsupported attribute form: %d.",
5491 die->attrs[i].form);
5493 fprintf (stderr, "\n");
5499 struct die_info *die;
5509 store_in_ref_table (offset, die)
5510 unsigned int offset;
5511 struct die_info *die;
5514 struct die_info *old;
5516 h = (offset % REF_HASH_SIZE);
5517 old = die_ref_table[h];
5518 die->next_ref = old;
5519 die_ref_table[h] = die;
5524 dwarf2_empty_die_ref_table ()
5526 memset (die_ref_table, 0, sizeof (die_ref_table));
5530 dwarf2_get_ref_die_offset (attr)
5531 struct attribute *attr;
5533 unsigned int result = 0;
5537 case DW_FORM_ref_addr:
5538 result = DW_ADDR (attr);
5543 case DW_FORM_ref_udata:
5544 result = cu_header_offset + DW_UNSND (attr);
5547 complain (&dwarf2_unsupported_die_ref_attr, dwarf_form_name (attr->form));
5553 follow_die_ref (offset)
5554 unsigned int offset;
5556 struct die_info *die;
5559 h = (offset % REF_HASH_SIZE);
5560 die = die_ref_table[h];
5563 if (die->offset == offset)
5567 die = die->next_ref;
5572 static struct type *
5573 dwarf2_fundamental_type (objfile, typeid)
5574 struct objfile *objfile;
5577 if (typeid < 0 || typeid >= FT_NUM_MEMBERS)
5579 error ("Dwarf Error: internal error - invalid fundamental type id %d.",
5583 /* Look for this particular type in the fundamental type vector. If
5584 one is not found, create and install one appropriate for the
5585 current language and the current target machine. */
5587 if (ftypes[typeid] == NULL)
5589 ftypes[typeid] = cu_language_defn->la_fund_type (objfile, typeid);
5592 return (ftypes[typeid]);
5595 /* Decode simple location descriptions.
5596 Given a pointer to a dwarf block that defines a location, compute
5597 the location and return the value.
5599 FIXME: This is a kludge until we figure out a better
5600 way to handle the location descriptions.
5601 Gdb's design does not mesh well with the DWARF2 notion of a location
5602 computing interpreter, which is a shame because the flexibility goes unused.
5603 FIXME: Implement more operations as necessary.
5605 A location description containing no operations indicates that the
5606 object is optimized out. The global optimized_out flag is set for
5607 those, the return value is meaningless.
5609 When the result is a register number, the global isreg flag is set,
5610 otherwise it is cleared.
5612 When the result is a base register offset, the global offreg flag is set
5613 and the register number is returned in basereg, otherwise it is cleared.
5615 When the DW_OP_fbreg operation is encountered without a corresponding
5616 DW_AT_frame_base attribute, the global islocal flag is set.
5617 Hopefully the machine dependent code knows how to set up a virtual
5618 frame pointer for the local references.
5620 Note that stack[0] is unused except as a default error return.
5621 Note that stack overflow is not yet handled. */
5624 decode_locdesc (blk, objfile)
5625 struct dwarf_block *blk;
5626 struct objfile *objfile;
5629 int size = blk->size;
5630 char *data = blk->data;
5631 CORE_ADDR stack[64];
5633 unsigned int bytes_read, unsnd;
5683 stack[++stacki] = op - DW_OP_reg0;
5688 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
5690 #if defined(HARRIS_TARGET) && defined(_M88K)
5691 /* The Harris 88110 gdb ports have long kept their special reg
5692 numbers between their gp-regs and their x-regs. This is
5693 not how our dwarf is generated. Punt. */
5696 stack[++stacki] = unsnd;
5732 basereg = op - DW_OP_breg0;
5733 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
5738 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
5740 if (frame_base_reg >= 0)
5743 basereg = frame_base_reg;
5744 stack[stacki] += frame_base_offset;
5748 complain (&dwarf2_missing_at_frame_base);
5754 stack[++stacki] = read_address (objfile->obfd, &data[i]);
5759 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
5764 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
5769 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
5774 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
5779 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
5784 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
5789 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
5795 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
5800 stack[stacki - 1] += stack[stacki];
5804 case DW_OP_plus_uconst:
5805 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
5810 stack[stacki - 1] = stack[stacki] - stack[stacki - 1];
5815 complain (&dwarf2_unsupported_stack_op, dwarf_stack_op_name(op));
5816 return (stack[stacki]);
5819 return (stack[stacki]);
5822 /* memory allocation interface */
5826 dwarf2_free_tmp_obstack (ignore)
5829 obstack_free (&dwarf2_tmp_obstack, NULL);
5832 static struct dwarf_block *
5833 dwarf_alloc_block ()
5835 struct dwarf_block *blk;
5837 blk = (struct dwarf_block *)
5838 obstack_alloc (&dwarf2_tmp_obstack, sizeof (struct dwarf_block));
5842 static struct abbrev_info *
5843 dwarf_alloc_abbrev ()
5845 struct abbrev_info *abbrev;
5847 abbrev = (struct abbrev_info *) xmalloc (sizeof (struct abbrev_info));
5848 memset (abbrev, 0, sizeof (struct abbrev_info));
5852 static struct die_info *
5855 struct die_info *die;
5857 die = (struct die_info *) xmalloc (sizeof (struct die_info));
5858 memset (die, 0, sizeof (struct die_info));