1 /* DWARF 2 debugging format support for GDB.
2 Copyright 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
4 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
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)
1005 info_ptr = scan_partial_symbols (info_ptr, objfile, &lowpc, &highpc);
1007 /* If the compilation unit didn't have an explicit address range,
1008 then use the information extracted from its child dies. */
1009 if (!comp_unit_has_pc_info)
1011 comp_unit_die.lowpc = lowpc;
1012 comp_unit_die.highpc = highpc;
1014 pst->textlow = comp_unit_die.lowpc + baseaddr;
1015 pst->texthigh = comp_unit_die.highpc + baseaddr;
1017 pst->n_global_syms = objfile->global_psymbols.next -
1018 (objfile->global_psymbols.list + pst->globals_offset);
1019 pst->n_static_syms = objfile->static_psymbols.next -
1020 (objfile->static_psymbols.list + pst->statics_offset);
1021 sort_pst_symbols (pst);
1023 /* If there is already a psymtab or symtab for a file of this
1024 name, remove it. (If there is a symtab, more drastic things
1025 also happen.) This happens in VxWorks. */
1026 free_named_symtabs (pst->filename);
1028 info_ptr = beg_of_comp_unit + cu_header.length + 4;
1030 do_cleanups (back_to);
1033 /* Read in all interesting dies to the end of the compilation unit. */
1036 scan_partial_symbols (info_ptr, objfile, lowpc, highpc)
1038 struct objfile *objfile;
1042 bfd *abfd = objfile->obfd;
1043 struct partial_die_info pdi;
1045 /* This function is called after we've read in the comp_unit_die in
1046 order to read its children. We start the nesting level at 1 since
1047 we have pushed 1 level down in order to read the comp unit's children.
1048 The comp unit itself is at level 0, so we stop reading when we pop
1049 back to that level. */
1051 int nesting_level = 1;
1054 *lowpc = ((CORE_ADDR) -1);
1055 *highpc = ((CORE_ADDR) 0);
1057 while (nesting_level)
1059 info_ptr = read_partial_die (&pdi, abfd, info_ptr, &has_pc_info);
1065 case DW_TAG_subprogram:
1068 if (pdi.lowpc < *lowpc)
1072 if (pdi.highpc > *highpc)
1074 *highpc = pdi.highpc;
1076 if ((pdi.is_external || nesting_level == 1)
1077 && !pdi.is_declaration)
1079 add_partial_symbol (&pdi, objfile);
1083 case DW_TAG_variable:
1084 case DW_TAG_typedef:
1085 case DW_TAG_class_type:
1086 case DW_TAG_structure_type:
1087 case DW_TAG_union_type:
1088 case DW_TAG_enumeration_type:
1089 if ((pdi.is_external || nesting_level == 1)
1090 && !pdi.is_declaration)
1092 add_partial_symbol (&pdi, objfile);
1095 case DW_TAG_enumerator:
1096 /* File scope enumerators are added to the partial symbol
1098 if (nesting_level == 2)
1099 add_partial_symbol (&pdi, objfile);
1101 case DW_TAG_base_type:
1102 /* File scope base type definitions are added to the partial
1104 if (nesting_level == 1)
1105 add_partial_symbol (&pdi, objfile);
1112 /* If the die has a sibling, skip to the sibling.
1113 Do not skip enumeration types, we want to record their
1115 if (pdi.sibling && pdi.tag != DW_TAG_enumeration_type)
1117 info_ptr = pdi.sibling;
1119 else if (pdi.has_children)
1121 /* Die has children, but the optional DW_AT_sibling attribute
1132 /* If we didn't find a lowpc, set it to highpc to avoid complaints
1133 from `maint check'. */
1134 if (*lowpc == ((CORE_ADDR) -1))
1140 add_partial_symbol (pdi, objfile)
1141 struct partial_die_info *pdi;
1142 struct objfile *objfile;
1148 case DW_TAG_subprogram:
1149 if (pdi->is_external)
1151 prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
1153 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1154 VAR_NAMESPACE, LOC_BLOCK,
1155 &objfile->global_psymbols,
1156 0, pdi->lowpc + baseaddr, cu_language, objfile);
1160 prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
1161 mst_file_text, objfile);
1162 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1163 VAR_NAMESPACE, LOC_BLOCK,
1164 &objfile->static_psymbols,
1165 0, pdi->lowpc + baseaddr, cu_language, objfile);
1168 case DW_TAG_variable:
1169 if (pdi->is_external)
1172 Don't enter into the minimal symbol tables as there is
1173 a minimal symbol table entry from the ELF symbols already.
1174 Enter into partial symbol table if it has a location
1175 descriptor or a type.
1176 If the location descriptor is missing, new_symbol will create
1177 a LOC_UNRESOLVED symbol, the address of the variable will then
1178 be determined from the minimal symbol table whenever the variable
1180 The address for the partial symbol table entry is not
1181 used by GDB, but it comes in handy for debugging partial symbol
1185 addr = decode_locdesc (pdi->locdesc, objfile);
1186 if (pdi->locdesc || pdi->has_type)
1187 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1188 VAR_NAMESPACE, LOC_STATIC,
1189 &objfile->global_psymbols,
1190 0, addr + baseaddr, cu_language, objfile);
1194 /* Static Variable. Skip symbols without location descriptors. */
1195 if (pdi->locdesc == NULL)
1197 addr = decode_locdesc (pdi->locdesc, objfile);
1198 prim_record_minimal_symbol (pdi->name, addr + baseaddr,
1199 mst_file_data, objfile);
1200 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1201 VAR_NAMESPACE, LOC_STATIC,
1202 &objfile->static_psymbols,
1203 0, addr + baseaddr, cu_language, objfile);
1206 case DW_TAG_typedef:
1207 case DW_TAG_base_type:
1208 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1209 VAR_NAMESPACE, LOC_TYPEDEF,
1210 &objfile->static_psymbols,
1211 0, (CORE_ADDR) 0, cu_language, objfile);
1213 case DW_TAG_class_type:
1214 case DW_TAG_structure_type:
1215 case DW_TAG_union_type:
1216 case DW_TAG_enumeration_type:
1217 /* Skip aggregate types without children, these are external
1219 if (pdi->has_children == 0)
1221 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1222 STRUCT_NAMESPACE, LOC_TYPEDEF,
1223 &objfile->static_psymbols,
1224 0, (CORE_ADDR) 0, cu_language, objfile);
1226 if (cu_language == language_cplus)
1228 /* For C++, these implicitly act as typedefs as well. */
1229 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1230 VAR_NAMESPACE, LOC_TYPEDEF,
1231 &objfile->static_psymbols,
1232 0, (CORE_ADDR) 0, cu_language, objfile);
1235 case DW_TAG_enumerator:
1236 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1237 VAR_NAMESPACE, LOC_CONST,
1238 &objfile->static_psymbols,
1239 0, (CORE_ADDR) 0, cu_language, objfile);
1246 /* Expand this partial symbol table into a full symbol table. */
1249 dwarf2_psymtab_to_symtab (pst)
1250 struct partial_symtab *pst;
1252 /* FIXME: This is barely more than a stub. */
1257 warning ("bug: psymtab for %s is already read in.", pst->filename);
1263 printf_filtered ("Reading in symbols for %s...", pst->filename);
1264 gdb_flush (gdb_stdout);
1267 psymtab_to_symtab_1 (pst);
1269 /* Finish up the debug error message. */
1271 printf_filtered ("done.\n");
1277 psymtab_to_symtab_1 (pst)
1278 struct partial_symtab *pst;
1280 struct objfile *objfile = pst->objfile;
1281 bfd *abfd = objfile->obfd;
1282 struct comp_unit_head cu_header;
1283 struct die_info *dies;
1284 unsigned long offset;
1285 CORE_ADDR lowpc, highpc;
1286 struct die_info *child_die;
1288 struct symtab *symtab;
1289 struct cleanup *back_to;
1291 /* Set local variables from the partial symbol table info. */
1292 offset = DWARF_INFO_OFFSET(pst);
1293 dwarf_info_buffer = DWARF_INFO_BUFFER(pst);
1294 dwarf_abbrev_buffer = DWARF_ABBREV_BUFFER(pst);
1295 dwarf_abbrev_size = DWARF_ABBREV_SIZE(pst);
1296 dwarf_line_buffer = DWARF_LINE_BUFFER(pst);
1297 baseaddr = ANOFFSET (pst->section_offsets, 0);
1298 cu_header_offset = offset;
1299 info_ptr = dwarf_info_buffer + offset;
1301 obstack_init (&dwarf2_tmp_obstack);
1302 back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL);
1305 make_cleanup (really_free_pendings, NULL);
1307 /* read in the comp_unit header */
1308 cu_header.length = read_4_bytes (abfd, info_ptr);
1310 cu_header.version = read_2_bytes (abfd, info_ptr);
1312 cu_header.abbrev_offset = read_4_bytes (abfd, info_ptr);
1314 cu_header.addr_size = read_1_byte (abfd, info_ptr);
1317 /* Read the abbrevs for this compilation unit */
1318 dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset);
1319 make_cleanup (dwarf2_empty_abbrev_table, NULL);
1321 dies = read_comp_unit (info_ptr, abfd);
1323 make_cleanup (free_die_list, dies);
1325 /* Do line number decoding in read_file_scope () */
1326 process_die (dies, objfile);
1328 if (!dwarf2_get_pc_bounds (dies, &lowpc, &highpc, objfile))
1330 /* Some compilers don't define a DW_AT_high_pc attribute for
1331 the compilation unit. If the DW_AT_high_pc is missing,
1332 synthesize it, by scanning the DIE's below the compilation unit. */
1334 if (dies->has_children)
1336 child_die = dies->next;
1337 while (child_die && child_die->tag)
1339 if (child_die->tag == DW_TAG_subprogram)
1341 CORE_ADDR low, high;
1343 if (dwarf2_get_pc_bounds (child_die, &low, &high, objfile))
1345 highpc = max (highpc, high);
1348 child_die = sibling_die (child_die);
1352 symtab = end_symtab (highpc + baseaddr, objfile, 0);
1354 /* Set symtab language to language from DW_AT_language.
1355 If the compilation is from a C file generated by language preprocessors,
1356 do not set the language if it was already deduced by start_subfile. */
1358 && !(cu_language == language_c && symtab->language != language_c))
1360 symtab->language = cu_language;
1362 pst->symtab = symtab;
1364 sort_symtab_syms (pst->symtab);
1366 do_cleanups (back_to);
1369 /* Process a die and its children. */
1372 process_die (die, objfile)
1373 struct die_info *die;
1374 struct objfile *objfile;
1378 case DW_TAG_padding:
1380 case DW_TAG_compile_unit:
1381 read_file_scope (die, objfile);
1383 case DW_TAG_subprogram:
1384 read_subroutine_type (die, objfile);
1385 read_func_scope (die, objfile);
1387 case DW_TAG_inlined_subroutine:
1388 /* FIXME: These are ignored for now.
1389 They could be used to set breakpoints on all inlined instances
1390 of a function and make GDB `next' properly over inlined functions. */
1392 case DW_TAG_lexical_block:
1393 read_lexical_block_scope (die, objfile);
1395 case DW_TAG_class_type:
1396 case DW_TAG_structure_type:
1397 case DW_TAG_union_type:
1398 read_structure_scope (die, objfile);
1400 case DW_TAG_enumeration_type:
1401 read_enumeration (die, objfile);
1403 case DW_TAG_subroutine_type:
1404 read_subroutine_type (die, objfile);
1406 case DW_TAG_array_type:
1407 read_array_type (die, objfile);
1409 case DW_TAG_pointer_type:
1410 read_tag_pointer_type (die, objfile);
1412 case DW_TAG_ptr_to_member_type:
1413 read_tag_ptr_to_member_type (die, objfile);
1415 case DW_TAG_reference_type:
1416 read_tag_reference_type (die, objfile);
1418 case DW_TAG_string_type:
1419 read_tag_string_type (die, objfile);
1421 case DW_TAG_base_type:
1422 read_base_type (die, objfile);
1423 if (dwarf_attr (die, DW_AT_name))
1425 /* Add a typedef symbol for the base type definition. */
1426 new_symbol (die, die->type, objfile);
1429 case DW_TAG_common_block:
1430 read_common_block (die, objfile);
1432 case DW_TAG_common_inclusion:
1435 new_symbol (die, NULL, objfile);
1441 read_file_scope (die, objfile)
1442 struct die_info *die;
1443 struct objfile *objfile;
1445 unsigned int line_offset = 0;
1446 CORE_ADDR lowpc = ((CORE_ADDR) -1);
1447 CORE_ADDR highpc = ((CORE_ADDR) 0);
1448 struct attribute *attr;
1449 char *name = "<unknown>";
1450 char *comp_dir = NULL;
1451 struct die_info *child_die;
1452 bfd *abfd = objfile->obfd;
1454 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile))
1456 if (die->has_children)
1458 child_die = die->next;
1459 while (child_die && child_die->tag)
1461 if (child_die->tag == DW_TAG_subprogram)
1463 CORE_ADDR low, high;
1465 if (dwarf2_get_pc_bounds (child_die, &low, &high, objfile))
1467 lowpc = min (lowpc, low);
1468 highpc = max (highpc, high);
1471 child_die = sibling_die (child_die);
1476 /* If we didn't find a lowpc, set it to highpc to avoid complaints
1477 from finish_block. */
1478 if (lowpc == ((CORE_ADDR) -1))
1483 attr = dwarf_attr (die, DW_AT_name);
1486 name = DW_STRING (attr);
1488 attr = dwarf_attr (die, DW_AT_comp_dir);
1491 comp_dir = DW_STRING (attr);
1494 /* Irix 6.2 native cc prepends <machine>.: to the compilation
1495 directory, get rid of it. */
1496 char *cp = strchr (comp_dir, ':');
1498 if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
1503 if (objfile->ei.entry_point >= lowpc &&
1504 objfile->ei.entry_point < highpc)
1506 objfile->ei.entry_file_lowpc = lowpc;
1507 objfile->ei.entry_file_highpc = highpc;
1510 attr = dwarf_attr (die, DW_AT_language);
1513 set_cu_language (DW_UNSND (attr));
1517 /* FIXME:Do something here. */
1518 if (dip->at_producer != NULL)
1520 handle_producer (dip->at_producer);
1524 /* The compilation unit may be in a different language or objfile,
1525 zero out all remembered fundamental types. */
1526 memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *));
1528 start_symtab (name, comp_dir, lowpc);
1529 record_debugformat ("DWARF 2");
1531 /* Decode line number information if present. */
1532 attr = dwarf_attr (die, DW_AT_stmt_list);
1535 line_offset = DW_UNSND (attr);
1536 dwarf_decode_lines (line_offset, comp_dir, abfd);
1539 /* Process all dies in compilation unit. */
1540 if (die->has_children)
1542 child_die = die->next;
1543 while (child_die && child_die->tag)
1545 process_die (child_die, objfile);
1546 child_die = sibling_die (child_die);
1552 read_func_scope (die, objfile)
1553 struct die_info *die;
1554 struct objfile *objfile;
1556 register struct context_stack *new;
1559 struct die_info *child_die;
1560 struct attribute *attr;
1563 name = dwarf2_linkage_name (die);
1565 /* Ignore functions with missing or empty names and functions with
1566 missing or invalid low and high pc attributes. */
1567 if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile))
1573 if (objfile->ei.entry_point >= lowpc &&
1574 objfile->ei.entry_point < highpc)
1576 objfile->ei.entry_func_lowpc = lowpc;
1577 objfile->ei.entry_func_highpc = highpc;
1580 if (STREQ (name, "main")) /* FIXME: hardwired name */
1582 objfile->ei.main_func_lowpc = lowpc;
1583 objfile->ei.main_func_highpc = highpc;
1586 /* Decode DW_AT_frame_base location descriptor if present, keep result
1587 for DW_OP_fbreg operands in decode_locdesc. */
1588 frame_base_reg = -1;
1589 frame_base_offset = 0;
1590 attr = dwarf_attr (die, DW_AT_frame_base);
1593 CORE_ADDR addr = decode_locdesc (DW_BLOCK (attr), objfile);
1595 frame_base_reg = addr;
1598 frame_base_reg = basereg;
1599 frame_base_offset = addr;
1602 complain (&dwarf2_unsupported_at_frame_base, name);
1605 new = push_context (0, lowpc);
1606 new->name = new_symbol (die, die->type, objfile);
1607 list_in_scope = &local_symbols;
1609 if (die->has_children)
1611 child_die = die->next;
1612 while (child_die && child_die->tag)
1614 process_die (child_die, objfile);
1615 child_die = sibling_die (child_die);
1619 new = pop_context ();
1620 /* Make a block for the local symbols within. */
1621 finish_block (new->name, &local_symbols, new->old_blocks,
1622 lowpc, highpc, objfile);
1623 list_in_scope = &file_symbols;
1626 /* Process all the DIES contained within a lexical block scope. Start
1627 a new scope, process the dies, and then close the scope. */
1630 read_lexical_block_scope (die, objfile)
1631 struct die_info *die;
1632 struct objfile *objfile;
1634 register struct context_stack *new;
1635 CORE_ADDR lowpc, highpc;
1636 struct die_info *child_die;
1638 /* Ignore blocks with missing or invalid low and high pc attributes. */
1639 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile))
1644 push_context (0, lowpc);
1645 if (die->has_children)
1647 child_die = die->next;
1648 while (child_die && child_die->tag)
1650 process_die (child_die, objfile);
1651 child_die = sibling_die (child_die);
1654 new = pop_context ();
1656 if (local_symbols != NULL)
1658 finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
1661 local_symbols = new->locals;
1664 /* Get low and high pc attributes from a die.
1665 Return 1 if the attributes are present and valid, otherwise, return 0. */
1668 dwarf2_get_pc_bounds (die, lowpc, highpc, objfile)
1669 struct die_info *die;
1672 struct objfile *objfile;
1674 struct attribute *attr;
1678 attr = dwarf_attr (die, DW_AT_low_pc);
1680 low = DW_ADDR (attr);
1683 attr = dwarf_attr (die, DW_AT_high_pc);
1685 high = DW_ADDR (attr);
1692 /* When using the GNU linker, .gnu.linkonce. sections are used to
1693 eliminate duplicate copies of functions and vtables and such.
1694 The linker will arbitrarily choose one and discard the others.
1695 The AT_*_pc values for such functions refer to local labels in
1696 these sections. If the section from that file was discarded, the
1697 labels are not in the output, so the relocs get a value of 0.
1698 If this is a discarded function, mark the pc bounds as invalid,
1699 so that GDB will ignore it. */
1700 if (low == 0 && (bfd_get_file_flags (objfile->obfd) & HAS_RELOC) == 0)
1708 /* Add an aggregate field to the field list. */
1711 dwarf2_add_field (fip, die, objfile)
1712 struct field_info *fip;
1713 struct die_info *die;
1714 struct objfile *objfile;
1716 struct nextfield *new_field;
1717 struct attribute *attr;
1719 char *fieldname = "";
1721 /* Allocate a new field list entry and link it in. */
1722 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
1723 make_cleanup (free, new_field);
1724 memset (new_field, 0, sizeof (struct nextfield));
1725 new_field->next = fip->fields;
1726 fip->fields = new_field;
1729 /* Handle accessibility and virtuality of field.
1730 The default accessibility for members is public, the default
1731 accessibility for inheritance is private. */
1732 if (die->tag != DW_TAG_inheritance)
1733 new_field->accessibility = DW_ACCESS_public;
1735 new_field->accessibility = DW_ACCESS_private;
1736 new_field->virtuality = DW_VIRTUALITY_none;
1738 attr = dwarf_attr (die, DW_AT_accessibility);
1740 new_field->accessibility = DW_UNSND (attr);
1741 if (new_field->accessibility != DW_ACCESS_public)
1742 fip->non_public_fields = 1;
1743 attr = dwarf_attr (die, DW_AT_virtuality);
1745 new_field->virtuality = DW_UNSND (attr);
1747 fp = &new_field->field;
1748 if (die->tag == DW_TAG_member)
1750 /* Get type of field. */
1751 fp->type = die_type (die, objfile);
1753 /* Get bit size of field (zero if none). */
1754 attr = dwarf_attr (die, DW_AT_bit_size);
1757 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
1761 FIELD_BITSIZE (*fp) = 0;
1764 /* Get bit offset of field. */
1765 attr = dwarf_attr (die, DW_AT_data_member_location);
1768 FIELD_BITPOS (*fp) =
1769 decode_locdesc (DW_BLOCK (attr), objfile) * bits_per_byte;
1772 FIELD_BITPOS (*fp) = 0;
1773 attr = dwarf_attr (die, DW_AT_bit_offset);
1776 if (BITS_BIG_ENDIAN)
1778 /* For big endian bits, the DW_AT_bit_offset gives the
1779 additional bit offset from the MSB of the containing
1780 anonymous object to the MSB of the field. We don't
1781 have to do anything special since we don't need to
1782 know the size of the anonymous object. */
1783 FIELD_BITPOS (*fp) += DW_UNSND (attr);
1787 /* For little endian bits, compute the bit offset to the
1788 MSB of the anonymous object, subtract off the number of
1789 bits from the MSB of the field to the MSB of the
1790 object, and then subtract off the number of bits of
1791 the field itself. The result is the bit offset of
1792 the LSB of the field. */
1794 int bit_offset = DW_UNSND (attr);
1796 attr = dwarf_attr (die, DW_AT_byte_size);
1799 /* The size of the anonymous object containing
1800 the bit field is explicit, so use the
1801 indicated size (in bytes). */
1802 anonymous_size = DW_UNSND (attr);
1806 /* The size of the anonymous object containing
1807 the bit field must be inferred from the type
1808 attribute of the data member containing the
1810 anonymous_size = TYPE_LENGTH (fp->type);
1812 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
1813 - bit_offset - FIELD_BITSIZE (*fp);
1817 /* Get name of field. */
1818 attr = dwarf_attr (die, DW_AT_name);
1819 if (attr && DW_STRING (attr))
1820 fieldname = DW_STRING (attr);
1821 fp->name = obsavestring (fieldname, strlen (fieldname),
1822 &objfile->type_obstack);
1824 /* Change accessibility for artificial fields (e.g. virtual table
1825 pointer or virtual base class pointer) to private. */
1826 if (dwarf_attr (die, DW_AT_artificial))
1828 new_field->accessibility = DW_ACCESS_private;
1829 fip->non_public_fields = 1;
1832 else if (die->tag == DW_TAG_variable)
1837 /* C++ static member.
1838 Get physical name, extract field name from physical name. */
1839 physname = dwarf2_linkage_name (die);
1840 if (physname == NULL)
1844 while (*cp && !is_cplus_marker (*cp))
1848 if (*fieldname == '\0')
1850 complain (&dwarf2_bad_static_member_name, physname);
1853 SET_FIELD_PHYSNAME (*fp, obsavestring (physname, strlen (physname),
1854 &objfile->type_obstack));
1855 FIELD_TYPE (*fp) = die_type (die, objfile);
1856 FIELD_NAME (*fp) = obsavestring (fieldname, strlen (fieldname),
1857 &objfile->type_obstack);
1859 else if (die->tag == DW_TAG_inheritance)
1861 /* C++ base class field. */
1862 attr = dwarf_attr (die, DW_AT_data_member_location);
1864 FIELD_BITPOS (*fp) = decode_locdesc (DW_BLOCK (attr), objfile) * bits_per_byte;
1865 FIELD_BITSIZE (*fp) = 0;
1866 FIELD_TYPE (*fp) = die_type (die, objfile);
1867 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
1868 fip->nbaseclasses++;
1872 /* Create the vector of fields, and attach it to the type. */
1875 dwarf2_attach_fields_to_type (fip, type, objfile)
1876 struct field_info *fip;
1878 struct objfile *objfile;
1880 int nfields = fip->nfields;
1882 /* Record the field count, allocate space for the array of fields,
1883 and create blank accessibility bitfields if necessary. */
1884 TYPE_NFIELDS (type) = nfields;
1885 TYPE_FIELDS (type) = (struct field *)
1886 TYPE_ALLOC (type, sizeof (struct field) * nfields);
1887 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
1889 if (fip->non_public_fields)
1891 ALLOCATE_CPLUS_STRUCT_TYPE (type);
1893 TYPE_FIELD_PRIVATE_BITS (type) =
1894 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
1895 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
1897 TYPE_FIELD_PROTECTED_BITS (type) =
1898 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
1899 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
1901 TYPE_FIELD_IGNORE_BITS (type) =
1902 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
1903 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
1906 /* If the type has baseclasses, allocate and clear a bit vector for
1907 TYPE_FIELD_VIRTUAL_BITS. */
1908 if (fip->nbaseclasses)
1910 int num_bytes = B_BYTES (fip->nbaseclasses);
1913 ALLOCATE_CPLUS_STRUCT_TYPE (type);
1914 pointer = (char *) TYPE_ALLOC (type, num_bytes);
1915 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
1916 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
1917 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
1920 /* Copy the saved-up fields into the field vector. Start from the head
1921 of the list, adding to the tail of the field array, so that they end
1922 up in the same order in the array in which they were added to the list. */
1923 while (nfields-- > 0)
1925 TYPE_FIELD (type, nfields) = fip->fields->field;
1926 switch (fip->fields->accessibility)
1928 case DW_ACCESS_private:
1929 SET_TYPE_FIELD_PRIVATE (type, nfields);
1932 case DW_ACCESS_protected:
1933 SET_TYPE_FIELD_PROTECTED (type, nfields);
1936 case DW_ACCESS_public:
1940 /* Unknown accessibility. Complain and treat it as public. */
1942 complain (&dwarf2_unsupported_accessibility,
1943 fip->fields->accessibility);
1947 if (nfields < fip->nbaseclasses)
1949 switch (fip->fields->virtuality)
1951 case DW_VIRTUALITY_virtual:
1952 case DW_VIRTUALITY_pure_virtual:
1953 SET_TYPE_FIELD_VIRTUAL (type, nfields);
1957 fip->fields = fip->fields->next;
1961 /* Skip to the end of a member function name in a mangled name. */
1964 skip_member_fn_name (physname)
1967 char *endname = physname;
1969 /* Skip over leading underscores. */
1970 while (*endname == '_')
1973 /* Find two succesive underscores. */
1975 endname = strchr (endname, '_');
1976 while (endname != NULL && *++endname != '_');
1978 if (endname == NULL)
1980 complain (&dwarf2_bad_member_name_complaint, physname);
1985 /* Take care of trailing underscores. */
1986 if (endname[1] != '_')
1992 /* Add a member function to the proper fieldlist. */
1995 dwarf2_add_member_fn (fip, die, type, objfile)
1996 struct field_info *fip;
1997 struct die_info *die;
1999 struct objfile *objfile;
2001 struct attribute *attr;
2002 struct fnfieldlist *flp;
2004 struct fn_field *fnp;
2007 struct nextfnfield *new_fnfield;
2009 /* Extract member function name from mangled name. */
2010 physname = dwarf2_linkage_name (die);
2011 if (physname == NULL)
2013 if ((physname[0] == '_' && physname[1] == '_'
2014 && strchr ("0123456789Qt", physname[2]))
2015 || DESTRUCTOR_PREFIX_P (physname))
2017 /* Constructor and destructor field names are set to the name
2018 of the class, but without template parameter lists.
2019 The name might be missing for anonymous aggregates. */
2020 if (TYPE_TAG_NAME (type))
2022 char *p = strchr (TYPE_TAG_NAME (type), '<');
2025 fieldname = TYPE_TAG_NAME (type);
2027 fieldname = obsavestring (TYPE_TAG_NAME (type),
2028 p - TYPE_TAG_NAME (type),
2029 &objfile->type_obstack);
2033 char *anon_name = "";
2034 fieldname = obsavestring (anon_name, strlen (anon_name),
2035 &objfile->type_obstack);
2040 char *endname = skip_member_fn_name (physname);
2042 /* Ignore member function if we were unable not extract the member
2044 if (endname == physname)
2046 fieldname = obsavestring (physname, endname - physname,
2047 &objfile->type_obstack);
2050 /* Look up member function name in fieldlist. */
2051 for (i = 0; i < fip->nfnfields; i++)
2053 if (STREQ (fip->fnfieldlists[i].name, fieldname))
2057 /* Create new list element if necessary. */
2058 if (i < fip->nfnfields)
2059 flp = &fip->fnfieldlists[i];
2062 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
2064 fip->fnfieldlists = (struct fnfieldlist *)
2065 xrealloc (fip->fnfieldlists,
2066 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
2067 * sizeof (struct fnfieldlist));
2068 if (fip->nfnfields == 0)
2069 make_cleanup (free_current_contents, &fip->fnfieldlists);
2071 flp = &fip->fnfieldlists[fip->nfnfields];
2072 flp->name = fieldname;
2078 /* Create a new member function field and chain it to the field list
2080 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
2081 make_cleanup (free, new_fnfield);
2082 memset (new_fnfield, 0, sizeof (struct nextfnfield));
2083 new_fnfield->next = flp->head;
2084 flp->head = new_fnfield;
2087 /* Fill in the member function field info. */
2088 fnp = &new_fnfield->fnfield;
2089 fnp->physname = obsavestring (physname, strlen (physname),
2090 &objfile->type_obstack);
2091 fnp->type = alloc_type (objfile);
2092 if (die->type && TYPE_CODE (die->type) == TYPE_CODE_FUNC)
2094 struct type *return_type = TYPE_TARGET_TYPE (die->type);
2095 struct type **arg_types;
2096 int nparams = TYPE_NFIELDS (die->type);
2099 /* Copy argument types from the subroutine type. */
2100 arg_types = (struct type **)
2101 TYPE_ALLOC (fnp->type, (nparams + 1) * sizeof (struct type *));
2102 for (iparams = 0; iparams < nparams; iparams++)
2103 arg_types[iparams] = TYPE_FIELD_TYPE (die->type, iparams);
2105 /* Set last entry in argument type vector. */
2106 if (TYPE_FLAGS (die->type) & TYPE_FLAG_VARARGS)
2107 arg_types[nparams] = NULL;
2109 arg_types[nparams] = dwarf2_fundamental_type (objfile, FT_VOID);
2111 smash_to_method_type (fnp->type, type, return_type, arg_types);
2113 /* Handle static member functions.
2114 Dwarf2 has no clean way to discern C++ static and non-static
2115 member functions. G++ helps GDB by marking the first
2116 parameter for non-static member functions (which is the
2117 this pointer) as artificial. We obtain this information
2118 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
2119 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (die->type, 0) == 0)
2120 fnp->voffset = VOFFSET_STATIC;
2123 complain (&dwarf2_missing_member_fn_type_complaint, physname);
2125 /* Get fcontext from DW_AT_containing_type if present. */
2126 if (dwarf_attr (die, DW_AT_containing_type) != NULL)
2127 fnp->fcontext = die_containing_type (die, objfile);
2129 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
2130 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
2132 /* Get accessibility. */
2133 attr = dwarf_attr (die, DW_AT_accessibility);
2136 switch (DW_UNSND (attr))
2138 case DW_ACCESS_private:
2139 fnp->is_private = 1;
2141 case DW_ACCESS_protected:
2142 fnp->is_protected = 1;
2147 /* Get index in virtual function table if it is a virtual member function. */
2148 attr = dwarf_attr (die, DW_AT_vtable_elem_location);
2150 fnp->voffset = decode_locdesc (DW_BLOCK (attr), objfile) + 2;
2153 /* Create the vector of member function fields, and attach it to the type. */
2156 dwarf2_attach_fn_fields_to_type (fip, type, objfile)
2157 struct field_info *fip;
2159 struct objfile *objfile;
2161 struct fnfieldlist *flp;
2162 int total_length = 0;
2165 ALLOCATE_CPLUS_STRUCT_TYPE (type);
2166 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
2167 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
2169 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
2171 struct nextfnfield *nfp = flp->head;
2172 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
2175 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
2176 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
2177 fn_flp->fn_fields = (struct fn_field *)
2178 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
2179 for (k = flp->length; (k--, nfp); nfp = nfp->next)
2180 fn_flp->fn_fields[k] = nfp->fnfield;
2182 total_length += flp->length;
2185 TYPE_NFN_FIELDS (type) = fip->nfnfields;
2186 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
2189 /* Called when we find the DIE that starts a structure or union scope
2190 (definition) to process all dies that define the members of the
2193 NOTE: we need to call struct_type regardless of whether or not the
2194 DIE has an at_name attribute, since it might be an anonymous
2195 structure or union. This gets the type entered into our set of
2198 However, if the structure is incomplete (an opaque struct/union)
2199 then suppress creating a symbol table entry for it since gdb only
2200 wants to find the one with the complete definition. Note that if
2201 it is complete, we just call new_symbol, which does it's own
2202 checking about whether the struct/union is anonymous or not (and
2203 suppresses creating a symbol table entry itself). */
2206 read_structure_scope (die, objfile)
2207 struct die_info *die;
2208 struct objfile *objfile;
2211 struct attribute *attr;
2213 type = alloc_type (objfile);
2215 INIT_CPLUS_SPECIFIC (type);
2216 attr = dwarf_attr (die, DW_AT_name);
2217 if (attr && DW_STRING (attr))
2219 TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr),
2220 strlen (DW_STRING (attr)),
2221 &objfile->type_obstack);
2224 if (die->tag == DW_TAG_structure_type)
2226 TYPE_CODE (type) = TYPE_CODE_STRUCT;
2228 else if (die->tag == DW_TAG_union_type)
2230 TYPE_CODE (type) = TYPE_CODE_UNION;
2234 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
2236 TYPE_CODE (type) = TYPE_CODE_CLASS;
2239 attr = dwarf_attr (die, DW_AT_byte_size);
2242 TYPE_LENGTH (type) = DW_UNSND (attr);
2246 TYPE_LENGTH (type) = 0;
2249 /* We need to add the type field to the die immediately so we don't
2250 infinitely recurse when dealing with pointers to the structure
2251 type within the structure itself. */
2254 if (die->has_children)
2256 struct field_info fi;
2257 struct die_info *child_die;
2258 struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
2260 memset (&fi, 0, sizeof (struct field_info));
2262 child_die = die->next;
2264 while (child_die && child_die->tag)
2266 if (child_die->tag == DW_TAG_member)
2268 dwarf2_add_field (&fi, child_die, objfile);
2270 else if (child_die->tag == DW_TAG_variable)
2272 /* C++ static member. */
2273 dwarf2_add_field (&fi, child_die, objfile);
2275 else if (child_die->tag == DW_TAG_subprogram)
2277 /* C++ member function. */
2278 process_die (child_die, objfile);
2279 dwarf2_add_member_fn (&fi, child_die, type, objfile);
2281 else if (child_die->tag == DW_TAG_inheritance)
2283 /* C++ base class field. */
2284 dwarf2_add_field (&fi, child_die, objfile);
2288 process_die (child_die, objfile);
2290 child_die = sibling_die (child_die);
2293 /* Attach fields and member functions to the type. */
2295 dwarf2_attach_fields_to_type (&fi, type, objfile);
2298 dwarf2_attach_fn_fields_to_type (&fi, type, objfile);
2300 /* Get the type which refers to the base class (possibly this
2301 class itself) which contains the vtable pointer for the current
2302 class from the DW_AT_containing_type attribute. */
2304 if (dwarf_attr (die, DW_AT_containing_type) != NULL)
2306 struct type *t = die_containing_type (die, objfile);
2308 TYPE_VPTR_BASETYPE (type) = t;
2311 static const char vptr_name[] = { '_','v','p','t','r','\0' };
2314 /* Our own class provides vtbl ptr. */
2315 for (i = TYPE_NFIELDS (t) - 1;
2316 i >= TYPE_N_BASECLASSES (t);
2319 char *fieldname = TYPE_FIELD_NAME (t, i);
2321 if (STREQN (fieldname, vptr_name, strlen (vptr_name) - 1)
2322 && is_cplus_marker (fieldname[strlen (vptr_name)]))
2324 TYPE_VPTR_FIELDNO (type) = i;
2329 /* Complain if virtual function table field not found. */
2330 if (i < TYPE_N_BASECLASSES (t))
2331 complain (&dwarf2_vtbl_not_found_complaint,
2332 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : "");
2336 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
2341 new_symbol (die, type, objfile);
2343 do_cleanups (back_to);
2347 /* No children, must be stub. */
2348 TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
2354 /* Given a pointer to a die which begins an enumeration, process all
2355 the dies that define the members of the enumeration.
2357 This will be much nicer in draft 6 of the DWARF spec when our
2358 members will be dies instead squished into the DW_AT_element_list
2361 NOTE: We reverse the order of the element list. */
2364 read_enumeration (die, objfile)
2365 struct die_info *die;
2366 struct objfile *objfile;
2368 struct die_info *child_die;
2370 struct field *fields;
2371 struct attribute *attr;
2374 int unsigned_enum = 1;
2376 type = alloc_type (objfile);
2378 TYPE_CODE (type) = TYPE_CODE_ENUM;
2379 attr = dwarf_attr (die, DW_AT_name);
2380 if (attr && DW_STRING (attr))
2382 TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr),
2383 strlen (DW_STRING (attr)),
2384 &objfile->type_obstack);
2387 attr = dwarf_attr (die, DW_AT_byte_size);
2390 TYPE_LENGTH (type) = DW_UNSND (attr);
2394 TYPE_LENGTH (type) = 0;
2399 if (die->has_children)
2401 child_die = die->next;
2402 while (child_die && child_die->tag)
2404 if (child_die->tag != DW_TAG_enumerator)
2406 process_die (child_die, objfile);
2410 attr = dwarf_attr (child_die, DW_AT_name);
2413 sym = new_symbol (child_die, type, objfile);
2414 if (SYMBOL_VALUE (sym) < 0)
2417 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
2419 fields = (struct field *)
2421 (num_fields + DW_FIELD_ALLOC_CHUNK)
2422 * sizeof (struct field));
2425 FIELD_NAME (fields[num_fields]) = SYMBOL_NAME (sym);
2426 FIELD_TYPE (fields[num_fields]) = NULL;
2427 FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym);
2428 FIELD_BITSIZE (fields[num_fields]) = 0;
2434 child_die = sibling_die (child_die);
2439 TYPE_NFIELDS (type) = num_fields;
2440 TYPE_FIELDS (type) = (struct field *)
2441 TYPE_ALLOC (type, sizeof (struct field) * num_fields);
2442 memcpy (TYPE_FIELDS (type), fields,
2443 sizeof (struct field) * num_fields);
2447 TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED;
2450 new_symbol (die, type, objfile);
2453 /* Extract all information from a DW_TAG_array_type DIE and put it in
2454 the DIE's type field. For now, this only handles one dimensional
2458 read_array_type (die, objfile)
2459 struct die_info *die;
2460 struct objfile *objfile;
2462 struct die_info *child_die;
2463 struct type *type = NULL;
2464 struct type *element_type, *range_type, *index_type;
2465 struct type **range_types = NULL;
2466 struct attribute *attr;
2468 struct cleanup *back_to;
2470 /* Return if we've already decoded this type. */
2476 element_type = die_type (die, objfile);
2478 /* Irix 6.2 native cc creates array types without children for
2479 arrays with unspecified length. */
2480 if (die->has_children == 0)
2482 index_type = dwarf2_fundamental_type (objfile, FT_INTEGER);
2483 range_type = create_range_type (NULL, index_type, 0, -1);
2484 die->type = create_array_type (NULL, element_type, range_type);
2488 back_to = make_cleanup (null_cleanup, NULL);
2489 child_die = die->next;
2490 while (child_die && child_die->tag)
2492 if (child_die->tag == DW_TAG_subrange_type)
2494 unsigned int low, high;
2496 /* Default bounds to an array with unspecified length. */
2499 if (cu_language == language_fortran)
2501 /* FORTRAN implies a lower bound of 1, if not given. */
2505 index_type = die_type (child_die, objfile);
2506 attr = dwarf_attr (child_die, DW_AT_lower_bound);
2509 if (attr->form == DW_FORM_sdata)
2511 low = DW_SND (attr);
2513 else if (attr->form == DW_FORM_udata
2514 || attr->form == DW_FORM_data1
2515 || attr->form == DW_FORM_data2
2516 || attr->form == DW_FORM_data4)
2518 low = DW_UNSND (attr);
2522 complain (&dwarf2_non_const_array_bound_ignored,
2523 dwarf_form_name (attr->form));
2525 die->type = lookup_pointer_type (element_type);
2532 attr = dwarf_attr (child_die, DW_AT_upper_bound);
2535 if (attr->form == DW_FORM_sdata)
2537 high = DW_SND (attr);
2539 else if (attr->form == DW_FORM_udata
2540 || attr->form == DW_FORM_data1
2541 || attr->form == DW_FORM_data2
2542 || attr->form == DW_FORM_data4)
2544 high = DW_UNSND (attr);
2546 else if (attr->form == DW_FORM_block1)
2548 /* GCC encodes arrays with unspecified or dynamic length
2549 with a DW_FORM_block1 attribute.
2550 FIXME: GDB does not yet know how to handle dynamic
2551 arrays properly, treat them as arrays with unspecified
2557 complain (&dwarf2_non_const_array_bound_ignored,
2558 dwarf_form_name (attr->form));
2560 die->type = lookup_pointer_type (element_type);
2568 /* Create a range type and save it for array type creation. */
2569 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
2571 range_types = (struct type **)
2572 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
2573 * sizeof (struct type *));
2575 make_cleanup (free_current_contents, &range_types);
2577 range_types[ndim++] = create_range_type (NULL, index_type, low, high);
2579 child_die = sibling_die (child_die);
2582 /* Dwarf2 dimensions are output from left to right, create the
2583 necessary array types in backwards order. */
2584 type = element_type;
2586 type = create_array_type (NULL, type, range_types[ndim]);
2588 do_cleanups (back_to);
2590 /* Install the type in the die. */
2594 /* First cut: install each common block member as a global variable. */
2597 read_common_block (die, objfile)
2598 struct die_info *die;
2599 struct objfile *objfile;
2601 struct die_info *child_die;
2602 struct attribute *attr;
2604 CORE_ADDR base = (CORE_ADDR) 0;
2606 attr = dwarf_attr (die, DW_AT_location);
2609 base = decode_locdesc (DW_BLOCK (attr), objfile);
2611 if (die->has_children)
2613 child_die = die->next;
2614 while (child_die && child_die->tag)
2616 sym = new_symbol (child_die, NULL, objfile);
2617 attr = dwarf_attr (child_die, DW_AT_data_member_location);
2620 SYMBOL_VALUE_ADDRESS (sym) =
2621 base + decode_locdesc (DW_BLOCK (attr), objfile);
2622 add_symbol_to_list (sym, &global_symbols);
2624 child_die = sibling_die (child_die);
2629 /* Extract all information from a DW_TAG_pointer_type DIE and add to
2630 the user defined type vector. */
2633 read_tag_pointer_type (die, objfile)
2634 struct die_info *die;
2635 struct objfile *objfile;
2638 struct attribute *attr;
2645 type = lookup_pointer_type (die_type (die, objfile));
2646 attr = dwarf_attr (die, DW_AT_byte_size);
2649 TYPE_LENGTH (type) = DW_UNSND (attr);
2653 TYPE_LENGTH (type) = address_size;
2658 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
2659 the user defined type vector. */
2662 read_tag_ptr_to_member_type (die, objfile)
2663 struct die_info *die;
2664 struct objfile *objfile;
2667 struct type *to_type;
2668 struct type *domain;
2675 type = alloc_type (objfile);
2676 to_type = die_type (die, objfile);
2677 domain = die_containing_type (die, objfile);
2678 smash_to_member_type (type, domain, to_type);
2683 /* Extract all information from a DW_TAG_reference_type DIE and add to
2684 the user defined type vector. */
2687 read_tag_reference_type (die, objfile)
2688 struct die_info *die;
2689 struct objfile *objfile;
2692 struct attribute *attr;
2699 type = lookup_reference_type (die_type (die, objfile));
2700 attr = dwarf_attr (die, DW_AT_byte_size);
2703 TYPE_LENGTH (type) = DW_UNSND (attr);
2707 TYPE_LENGTH (type) = address_size;
2713 read_tag_const_type (die, objfile)
2714 struct die_info *die;
2715 struct objfile *objfile;
2722 complain (&dwarf2_const_ignored);
2723 die->type = die_type (die, objfile);
2727 read_tag_volatile_type (die, objfile)
2728 struct die_info *die;
2729 struct objfile *objfile;
2736 complain (&dwarf2_volatile_ignored);
2737 die->type = die_type (die, objfile);
2740 /* Extract all information from a DW_TAG_string_type DIE and add to
2741 the user defined type vector. It isn't really a user defined type,
2742 but it behaves like one, with other DIE's using an AT_user_def_type
2743 attribute to reference it. */
2746 read_tag_string_type (die, objfile)
2747 struct die_info *die;
2748 struct objfile *objfile;
2750 struct type *type, *range_type, *index_type, *char_type;
2751 struct attribute *attr;
2752 unsigned int length;
2759 attr = dwarf_attr (die, DW_AT_string_length);
2762 length = DW_UNSND (attr);
2768 index_type = dwarf2_fundamental_type (objfile, FT_INTEGER);
2769 range_type = create_range_type (NULL, index_type, 1, length);
2770 char_type = dwarf2_fundamental_type (objfile, FT_CHAR);
2771 type = create_string_type (char_type, range_type);
2775 /* Handle DIES due to C code like:
2779 int (*funcp)(int a, long l);
2783 ('funcp' generates a DW_TAG_subroutine_type DIE)
2787 read_subroutine_type (die, objfile)
2788 struct die_info *die;
2789 struct objfile *objfile;
2791 struct type *type; /* Type that this function returns */
2792 struct type *ftype; /* Function that returns above type */
2793 struct attribute *attr;
2795 /* Decode the type that this subroutine returns */
2800 type = die_type (die, objfile);
2801 ftype = lookup_function_type (type);
2802 attr = dwarf_attr (die, DW_AT_prototyped);
2803 if (attr && (DW_UNSND (attr) != 0))
2804 TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED;
2806 if (die->has_children)
2808 struct die_info *child_die;
2812 /* Count the number of parameters.
2813 FIXME: GDB currently ignores vararg functions, but knows about
2814 vararg member functions. */
2815 child_die = die->next;
2816 while (child_die && child_die->tag)
2818 if (child_die->tag == DW_TAG_formal_parameter)
2820 else if (child_die->tag == DW_TAG_unspecified_parameters)
2821 TYPE_FLAGS (ftype) |= TYPE_FLAG_VARARGS;
2822 child_die = sibling_die (child_die);
2825 /* Allocate storage for parameters and fill them in. */
2826 TYPE_NFIELDS (ftype) = nparams;
2827 TYPE_FIELDS (ftype) = (struct field *)
2828 TYPE_ALLOC (ftype, nparams * sizeof (struct field));
2830 child_die = die->next;
2831 while (child_die && child_die->tag)
2833 if (child_die->tag == DW_TAG_formal_parameter)
2835 /* Dwarf2 has no clean way to discern C++ static and non-static
2836 member functions. G++ helps GDB by marking the first
2837 parameter for non-static member functions (which is the
2838 this pointer) as artificial. We pass this information
2839 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
2840 attr = dwarf_attr (child_die, DW_AT_artificial);
2842 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
2844 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
2845 TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, objfile);
2848 child_die = sibling_die (child_die);
2856 read_typedef (die, objfile)
2857 struct die_info *die;
2858 struct objfile *objfile;
2864 struct attribute *attr;
2867 xtype = die_type (die, objfile);
2869 type = alloc_type (objfile);
2870 TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
2871 TYPE_FLAGS (type) |= TYPE_FLAG_TARGET_STUB;
2872 TYPE_TARGET_TYPE (type) = xtype;
2873 attr = dwarf_attr (die, DW_AT_name);
2874 if (attr && DW_STRING (attr))
2875 TYPE_NAME (type) = obsavestring (DW_STRING (attr),
2876 strlen (DW_STRING (attr)),
2877 &objfile->type_obstack);
2883 /* Find a representation of a given base type and install
2884 it in the TYPE field of the die. */
2887 read_base_type (die, objfile)
2888 struct die_info *die;
2889 struct objfile *objfile;
2892 struct attribute *attr;
2893 int encoding = 0, size = 0;
2895 /* If we've already decoded this die, this is a no-op. */
2901 attr = dwarf_attr (die, DW_AT_encoding);
2904 encoding = DW_UNSND (attr);
2906 attr = dwarf_attr (die, DW_AT_byte_size);
2909 size = DW_UNSND (attr);
2911 attr = dwarf_attr (die, DW_AT_name);
2912 if (attr && DW_STRING (attr))
2914 enum type_code code = TYPE_CODE_INT;
2915 int is_unsigned = 0;
2919 case DW_ATE_address:
2920 /* Turn DW_ATE_address into a void * pointer. */
2921 code = TYPE_CODE_PTR;
2924 case DW_ATE_boolean:
2925 code = TYPE_CODE_BOOL;
2928 case DW_ATE_complex_float:
2929 code = TYPE_CODE_COMPLEX;
2932 code = TYPE_CODE_FLT;
2935 case DW_ATE_signed_char:
2937 case DW_ATE_unsigned:
2938 case DW_ATE_unsigned_char:
2942 complain (&dwarf2_unsupported_at_encoding,
2943 dwarf_type_encoding_name (encoding));
2946 type = init_type (code, size, is_unsigned, DW_STRING (attr), objfile);
2947 if (encoding == DW_ATE_address)
2948 TYPE_TARGET_TYPE (type) = dwarf2_fundamental_type (objfile, FT_VOID);
2952 type = dwarf_base_type (encoding, size, objfile);
2957 /* Read a whole compilation unit into a linked list of dies. */
2960 read_comp_unit (info_ptr, abfd)
2964 struct die_info *first_die, *last_die, *die;
2968 /* Reset die reference table, we are building a new one now. */
2969 dwarf2_empty_die_ref_table ();
2973 first_die = last_die = NULL;
2976 cur_ptr = read_full_die (&die, abfd, cur_ptr);
2977 if (die->has_children)
2988 /* Enter die in reference hash table */
2989 store_in_ref_table (die->offset, die);
2993 first_die = last_die = die;
2997 last_die->next = die;
3001 while (nesting_level > 0);
3005 /* Free a linked list of dies. */
3008 free_die_list (dies)
3009 struct die_info *dies;
3011 struct die_info *die, *next;
3023 /* Read the contents of the section at OFFSET and of size SIZE from the
3024 object file specified by OBJFILE into the psymbol_obstack and return it. */
3027 dwarf2_read_section (objfile, offset, size)
3028 struct objfile *objfile;
3032 bfd *abfd = objfile->obfd;
3038 buf = (char *) obstack_alloc (&objfile->psymbol_obstack, size);
3039 if ((bfd_seek (abfd, offset, SEEK_SET) != 0) ||
3040 (bfd_read (buf, size, 1, abfd) != size))
3043 error ("Dwarf Error: Can't read DWARF data from '%s'",
3044 bfd_get_filename (abfd));
3049 /* In DWARF version 2, the description of the debugging information is
3050 stored in a separate .debug_abbrev section. Before we read any
3051 dies from a section we read in all abbreviations and install them
3055 dwarf2_read_abbrevs (abfd, offset)
3057 unsigned int offset;
3060 struct abbrev_info *cur_abbrev;
3061 unsigned int abbrev_number, bytes_read, abbrev_name;
3062 unsigned int abbrev_form, hash_number;
3064 /* empty the table */
3065 dwarf2_empty_abbrev_table (NULL);
3067 abbrev_ptr = dwarf_abbrev_buffer + offset;
3068 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3069 abbrev_ptr += bytes_read;
3071 /* loop until we reach an abbrev number of 0 */
3072 while (abbrev_number)
3074 cur_abbrev = dwarf_alloc_abbrev ();
3076 /* read in abbrev header */
3077 cur_abbrev->number = abbrev_number;
3078 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3079 abbrev_ptr += bytes_read;
3080 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
3083 /* now read in declarations */
3084 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3085 abbrev_ptr += bytes_read;
3086 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3087 abbrev_ptr += bytes_read;
3090 if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0)
3092 cur_abbrev->attrs = (struct attr_abbrev *)
3093 xrealloc (cur_abbrev->attrs,
3094 (cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK)
3095 * sizeof (struct attr_abbrev));
3097 cur_abbrev->attrs[cur_abbrev->num_attrs].name = abbrev_name;
3098 cur_abbrev->attrs[cur_abbrev->num_attrs++].form = abbrev_form;
3099 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3100 abbrev_ptr += bytes_read;
3101 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3102 abbrev_ptr += bytes_read;
3105 hash_number = abbrev_number % ABBREV_HASH_SIZE;
3106 cur_abbrev->next = dwarf2_abbrevs[hash_number];
3107 dwarf2_abbrevs[hash_number] = cur_abbrev;
3109 /* Get next abbreviation.
3110 Under Irix6 the abbreviations for a compilation unit are not
3111 always properly terminated with an abbrev number of 0.
3112 Exit loop if we encounter an abbreviation which we have
3113 already read (which means we are about to read the abbreviations
3114 for the next compile unit) or if the end of the abbreviation
3115 table is reached. */
3116 if ((unsigned int) (abbrev_ptr - dwarf_abbrev_buffer)
3117 >= dwarf_abbrev_size)
3119 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3120 abbrev_ptr += bytes_read;
3121 if (dwarf2_lookup_abbrev (abbrev_number) != NULL)
3126 /* Empty the abbrev table for a new compilation unit. */
3130 dwarf2_empty_abbrev_table (ignore)
3134 struct abbrev_info *abbrev, *next;
3136 for (i = 0; i < ABBREV_HASH_SIZE; ++i)
3139 abbrev = dwarf2_abbrevs[i];
3142 next = abbrev->next;
3143 free (abbrev->attrs);
3147 dwarf2_abbrevs[i] = NULL;
3151 /* Lookup an abbrev_info structure in the abbrev hash table. */
3153 static struct abbrev_info *
3154 dwarf2_lookup_abbrev (number)
3155 unsigned int number;
3157 unsigned int hash_number;
3158 struct abbrev_info *abbrev;
3160 hash_number = number % ABBREV_HASH_SIZE;
3161 abbrev = dwarf2_abbrevs[hash_number];
3165 if (abbrev->number == number)
3168 abbrev = abbrev->next;
3173 /* Read a minimal amount of information into the minimal die structure. */
3176 read_partial_die (part_die, abfd, info_ptr, has_pc_info)
3177 struct partial_die_info *part_die;
3182 unsigned int abbrev_number, bytes_read, i;
3183 struct abbrev_info *abbrev;
3184 struct attribute attr;
3185 struct attribute spec_attr;
3186 int found_spec_attr = 0;
3187 int has_low_pc_attr = 0;
3188 int has_high_pc_attr = 0;
3190 *part_die = zeroed_partial_die;
3192 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3193 info_ptr += bytes_read;
3197 abbrev = dwarf2_lookup_abbrev (abbrev_number);
3200 error ("Dwarf Error: Could not find abbrev number %d.", abbrev_number);
3202 part_die->offset = info_ptr - dwarf_info_buffer;
3203 part_die->tag = abbrev->tag;
3204 part_die->has_children = abbrev->has_children;
3205 part_die->abbrev = abbrev_number;
3207 for (i = 0; i < abbrev->num_attrs; ++i)
3209 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr);
3211 /* Store the data if it is of an attribute we want to keep in a
3212 partial symbol table. */
3217 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
3218 if (part_die->name == NULL)
3219 part_die->name = DW_STRING (&attr);
3221 case DW_AT_MIPS_linkage_name:
3222 part_die->name = DW_STRING (&attr);
3225 has_low_pc_attr = 1;
3226 part_die->lowpc = DW_ADDR (&attr);
3229 has_high_pc_attr = 1;
3230 part_die->highpc = DW_ADDR (&attr);
3232 case DW_AT_location:
3233 part_die->locdesc = DW_BLOCK (&attr);
3235 case DW_AT_language:
3236 part_die->language = DW_UNSND (&attr);
3238 case DW_AT_external:
3239 part_die->is_external = DW_UNSND (&attr);
3241 case DW_AT_declaration:
3242 part_die->is_declaration = DW_UNSND (&attr);
3245 part_die->has_type = 1;
3247 case DW_AT_abstract_origin:
3248 case DW_AT_specification:
3249 found_spec_attr = 1;
3253 /* Ignore absolute siblings, they might point outside of
3254 the current compile unit. */
3255 if (attr.form == DW_FORM_ref_addr)
3256 complain(&dwarf2_absolute_sibling_complaint);
3259 dwarf_info_buffer + dwarf2_get_ref_die_offset (&attr);
3266 /* If we found a reference attribute and the die has no name, try
3267 to find a name in the referred to die. */
3269 if (found_spec_attr && part_die->name == NULL)
3271 struct partial_die_info spec_die;
3275 spec_ptr = dwarf_info_buffer + dwarf2_get_ref_die_offset (&spec_attr);
3276 read_partial_die (&spec_die, abfd, spec_ptr, &dummy);
3279 part_die->name = spec_die.name;
3281 /* Copy DW_AT_external attribute if it is set. */
3282 if (spec_die.is_external)
3283 part_die->is_external = spec_die.is_external;
3287 /* When using the GNU linker, .gnu.linkonce. sections are used to
3288 eliminate duplicate copies of functions and vtables and such.
3289 The linker will arbitrarily choose one and discard the others.
3290 The AT_*_pc values for such functions refer to local labels in
3291 these sections. If the section from that file was discarded, the
3292 labels are not in the output, so the relocs get a value of 0.
3293 If this is a discarded function, mark the pc bounds as invalid,
3294 so that GDB will ignore it. */
3295 if (has_low_pc_attr && has_high_pc_attr
3296 && part_die->lowpc < part_die->highpc
3297 && (part_die->lowpc != 0
3298 || (bfd_get_file_flags (abfd) & HAS_RELOC)))
3303 /* Read the die from the .debug_info section buffer. And set diep to
3304 point to a newly allocated die with its information. */
3307 read_full_die (diep, abfd, info_ptr)
3308 struct die_info **diep;
3312 unsigned int abbrev_number, bytes_read, i, offset;
3313 struct abbrev_info *abbrev;
3314 struct die_info *die;
3316 offset = info_ptr - dwarf_info_buffer;
3317 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3318 info_ptr += bytes_read;
3321 die = dwarf_alloc_die ();
3323 die->abbrev = abbrev_number;
3329 abbrev = dwarf2_lookup_abbrev (abbrev_number);
3332 error ("Dwarf Error: could not find abbrev number %d.", abbrev_number);
3334 die = dwarf_alloc_die ();
3335 die->offset = offset;
3336 die->tag = abbrev->tag;
3337 die->has_children = abbrev->has_children;
3338 die->abbrev = abbrev_number;
3341 die->num_attrs = abbrev->num_attrs;
3342 die->attrs = (struct attribute *)
3343 xmalloc (die->num_attrs * sizeof (struct attribute));
3345 for (i = 0; i < abbrev->num_attrs; ++i)
3347 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
3355 /* Read an attribute described by an abbreviated attribute. */
3358 read_attribute (attr, abbrev, abfd, info_ptr)
3359 struct attribute *attr;
3360 struct attr_abbrev *abbrev;
3364 unsigned int bytes_read;
3365 struct dwarf_block *blk;
3367 attr->name = abbrev->name;
3368 attr->form = abbrev->form;
3369 switch (abbrev->form)
3372 case DW_FORM_ref_addr:
3373 DW_ADDR (attr) = read_address (abfd, info_ptr);
3374 info_ptr += address_size;
3376 case DW_FORM_block2:
3377 blk = dwarf_alloc_block ();
3378 blk->size = read_2_bytes (abfd, info_ptr);
3380 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
3381 info_ptr += blk->size;
3382 DW_BLOCK (attr) = blk;
3384 case DW_FORM_block4:
3385 blk = dwarf_alloc_block ();
3386 blk->size = read_4_bytes (abfd, info_ptr);
3388 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
3389 info_ptr += blk->size;
3390 DW_BLOCK (attr) = blk;
3393 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
3397 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
3401 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
3404 case DW_FORM_string:
3405 DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
3406 info_ptr += bytes_read;
3409 blk = dwarf_alloc_block ();
3410 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3411 info_ptr += bytes_read;
3412 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
3413 info_ptr += blk->size;
3414 DW_BLOCK (attr) = blk;
3416 case DW_FORM_block1:
3417 blk = dwarf_alloc_block ();
3418 blk->size = read_1_byte (abfd, info_ptr);
3420 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
3421 info_ptr += blk->size;
3422 DW_BLOCK (attr) = blk;
3425 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
3429 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
3433 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
3434 info_ptr += bytes_read;
3437 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3438 info_ptr += bytes_read;
3441 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
3445 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
3449 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
3452 case DW_FORM_ref_udata:
3453 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3454 info_ptr += bytes_read;
3457 case DW_FORM_indirect:
3459 error ("Dwarf Error: Cannot handle %s in DWARF reader.",
3460 dwarf_form_name (abbrev->form));
3465 /* read dwarf information from a buffer */
3468 read_1_byte (abfd, buf)
3472 return bfd_get_8 (abfd, (bfd_byte *) buf);
3476 read_1_signed_byte (abfd, buf)
3480 return bfd_get_signed_8 (abfd, (bfd_byte *) buf);
3484 read_2_bytes (abfd, buf)
3488 return bfd_get_16 (abfd, (bfd_byte *) buf);
3492 read_2_signed_bytes (abfd, buf)
3496 return bfd_get_signed_16 (abfd, (bfd_byte *) buf);
3500 read_4_bytes (abfd, buf)
3504 return bfd_get_32 (abfd, (bfd_byte *) buf);
3508 read_4_signed_bytes (abfd, buf)
3512 return bfd_get_signed_32 (abfd, (bfd_byte *) buf);
3516 read_8_bytes (abfd, buf)
3520 return bfd_get_64 (abfd, (bfd_byte *) buf);
3524 read_address (abfd, buf)
3528 CORE_ADDR retval = 0;
3530 switch (address_size)
3533 retval = bfd_get_32 (abfd, (bfd_byte *) buf);
3536 retval = bfd_get_64 (abfd, (bfd_byte *) buf);
3539 /* *THE* alternative is 8, right? */
3542 /* If the address being read is larger than the address that is
3543 applicable for the object file format then mask it down to the
3544 correct size. Take care to avoid unnecessary shift or shift
3546 if (address_size > address_significant_size
3547 && address_significant_size < sizeof (CORE_ADDR))
3549 CORE_ADDR mask = ((CORE_ADDR) 0) - 1;
3550 retval &= ~(mask << (address_significant_size * 8));
3556 read_n_bytes (abfd, buf, size)
3561 /* If the size of a host char is 8 bits, we can return a pointer
3562 to the buffer, otherwise we have to copy the data to a buffer
3563 allocated on the temporary obstack. */
3564 #if HOST_CHAR_BIT == 8
3570 ret = obstack_alloc (&dwarf2_tmp_obstack, size);
3571 for (i = 0; i < size; ++i)
3573 ret[i] = bfd_get_8 (abfd, (bfd_byte *) buf);
3581 read_string (abfd, buf, bytes_read_ptr)
3584 unsigned int *bytes_read_ptr;
3586 /* If the size of a host char is 8 bits, we can return a pointer
3587 to the string, otherwise we have to copy the string to a buffer
3588 allocated on the temporary obstack. */
3589 #if HOST_CHAR_BIT == 8
3592 *bytes_read_ptr = 1;
3595 *bytes_read_ptr = strlen (buf) + 1;
3601 while ((byte = bfd_get_8 (abfd, (bfd_byte *) buf)) != 0)
3603 obstack_1grow (&dwarf2_tmp_obstack, byte);
3609 *bytes_read_ptr = 1;
3612 obstack_1grow (&dwarf2_tmp_obstack, '\0');
3613 *bytes_read_ptr = i + 1;
3614 return obstack_finish (&dwarf2_tmp_obstack);
3619 read_unsigned_leb128 (abfd, buf, bytes_read_ptr)
3622 unsigned int *bytes_read_ptr;
3624 unsigned int result, num_read;
3634 byte = bfd_get_8 (abfd, (bfd_byte *) buf);
3637 result |= ((byte & 127) << shift);
3638 if ((byte & 128) == 0)
3644 *bytes_read_ptr = num_read;
3649 read_signed_leb128 (abfd, buf, bytes_read_ptr)
3652 unsigned int *bytes_read_ptr;
3655 int i, shift, size, num_read;
3665 byte = bfd_get_8 (abfd, (bfd_byte *) buf);
3668 result |= ((byte & 127) << shift);
3670 if ((byte & 128) == 0)
3675 if ((shift < size) && (byte & 0x40))
3677 result |= -(1 << shift);
3679 *bytes_read_ptr = num_read;
3684 set_cu_language (lang)
3691 cu_language = language_c;
3693 case DW_LANG_C_plus_plus:
3694 cu_language = language_cplus;
3696 case DW_LANG_Fortran77:
3697 case DW_LANG_Fortran90:
3698 cu_language = language_fortran;
3700 case DW_LANG_Mips_Assembler:
3701 cu_language = language_asm;
3704 case DW_LANG_Cobol74:
3705 case DW_LANG_Cobol85:
3706 case DW_LANG_Pascal83:
3707 case DW_LANG_Modula2:
3709 cu_language = language_unknown;
3712 cu_language_defn = language_def (cu_language);
3715 /* Return the named attribute or NULL if not there. */
3717 static struct attribute *
3718 dwarf_attr (die, name)
3719 struct die_info *die;
3723 struct attribute *spec = NULL;
3725 for (i = 0; i < die->num_attrs; ++i)
3727 if (die->attrs[i].name == name)
3729 return &die->attrs[i];
3731 if (die->attrs[i].name == DW_AT_specification
3732 || die->attrs[i].name == DW_AT_abstract_origin)
3733 spec = &die->attrs[i];
3737 struct die_info *ref_die =
3738 follow_die_ref (dwarf2_get_ref_die_offset (spec));
3741 return dwarf_attr (ref_die, name);
3747 /* Decode the line number information for the compilation unit whose
3748 line number info is at OFFSET in the .debug_line section.
3749 The compilation directory of the file is passed in COMP_DIR. */
3753 unsigned int num_files;
3766 unsigned int num_dirs;
3771 dwarf_decode_lines (offset, comp_dir, abfd)
3772 unsigned int offset;
3778 struct line_head lh;
3779 struct cleanup *back_to;
3780 unsigned int i, bytes_read;
3781 char *cur_file, *cur_dir;
3782 unsigned char op_code, extended_op, adj_opcode;
3784 #define FILE_ALLOC_CHUNK 5
3785 #define DIR_ALLOC_CHUNK 5
3787 struct filenames files;
3788 struct directories dirs;
3790 if (dwarf_line_buffer == NULL)
3792 complain (&dwarf2_missing_line_number_section);
3796 files.num_files = 0;
3802 line_ptr = dwarf_line_buffer + offset;
3804 /* read in the prologue */
3805 lh.total_length = read_4_bytes (abfd, line_ptr);
3807 line_end = line_ptr + lh.total_length;
3808 lh.version = read_2_bytes (abfd, line_ptr);
3810 lh.prologue_length = read_4_bytes (abfd, line_ptr);
3812 lh.minimum_instruction_length = read_1_byte (abfd, line_ptr);
3814 lh.default_is_stmt = read_1_byte (abfd, line_ptr);
3816 lh.line_base = read_1_signed_byte (abfd, line_ptr);
3818 lh.line_range = read_1_byte (abfd, line_ptr);
3820 lh.opcode_base = read_1_byte (abfd, line_ptr);
3822 lh.standard_opcode_lengths = (unsigned char *)
3823 xmalloc (lh.opcode_base * sizeof (unsigned char));
3824 back_to = make_cleanup (free_current_contents, &lh.standard_opcode_lengths);
3826 lh.standard_opcode_lengths[0] = 1;
3827 for (i = 1; i < lh.opcode_base; ++i)
3829 lh.standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
3833 /* Read directory table */
3834 while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
3836 line_ptr += bytes_read;
3837 if ((dirs.num_dirs % DIR_ALLOC_CHUNK) == 0)
3839 dirs.dirs = (char **)
3840 xrealloc (dirs.dirs,
3841 (dirs.num_dirs + DIR_ALLOC_CHUNK) * sizeof (char *));
3842 if (dirs.num_dirs == 0)
3843 make_cleanup (free_current_contents, &dirs.dirs);
3845 dirs.dirs[dirs.num_dirs++] = cur_dir;
3847 line_ptr += bytes_read;
3849 /* Read file name table */
3850 while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
3852 line_ptr += bytes_read;
3853 if ((files.num_files % FILE_ALLOC_CHUNK) == 0)
3855 files.files = (struct fileinfo *)
3856 xrealloc (files.files,
3857 (files.num_files + FILE_ALLOC_CHUNK)
3858 * sizeof (struct fileinfo));
3859 if (files.num_files == 0)
3860 make_cleanup (free_current_contents, &files.files);
3862 files.files[files.num_files].name = cur_file;
3863 files.files[files.num_files].dir =
3864 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3865 line_ptr += bytes_read;
3866 files.files[files.num_files].time =
3867 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3868 line_ptr += bytes_read;
3869 files.files[files.num_files].size =
3870 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3871 line_ptr += bytes_read;
3874 line_ptr += bytes_read;
3876 /* Read the statement sequences until there's nothing left. */
3877 while (line_ptr < line_end)
3879 /* state machine registers */
3880 CORE_ADDR address = 0;
3881 unsigned int file = 1;
3882 unsigned int line = 1;
3883 unsigned int column = 0;
3884 int is_stmt = lh.default_is_stmt;
3885 int basic_block = 0;
3886 int end_sequence = 0;
3888 /* Start a subfile for the current file of the state machine. */
3889 if (files.num_files >= file)
3891 /* The file and directory tables are 0 based, the references
3893 dwarf2_start_subfile (files.files[file - 1].name,
3894 (files.files[file - 1].dir
3895 ? dirs.dirs[files.files[file - 1].dir - 1]
3899 /* Decode the table. */
3900 while (! end_sequence)
3902 op_code = read_1_byte (abfd, line_ptr);
3906 case DW_LNS_extended_op:
3907 line_ptr += 1; /* ignore length */
3908 extended_op = read_1_byte (abfd, line_ptr);
3910 switch (extended_op)
3912 case DW_LNE_end_sequence:
3914 record_line (current_subfile, line, address);
3916 case DW_LNE_set_address:
3917 address = read_address (abfd, line_ptr) + baseaddr;
3918 line_ptr += address_size;
3920 case DW_LNE_define_file:
3921 cur_file = read_string (abfd, line_ptr, &bytes_read);
3922 line_ptr += bytes_read;
3923 if ((files.num_files % FILE_ALLOC_CHUNK) == 0)
3925 files.files = (struct fileinfo *)
3926 xrealloc (files.files,
3927 (files.num_files + FILE_ALLOC_CHUNK)
3928 * sizeof (struct fileinfo));
3929 if (files.num_files == 0)
3930 make_cleanup (free_current_contents, &files.files);
3932 files.files[files.num_files].name = cur_file;
3933 files.files[files.num_files].dir =
3934 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3935 line_ptr += bytes_read;
3936 files.files[files.num_files].time =
3937 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3938 line_ptr += bytes_read;
3939 files.files[files.num_files].size =
3940 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3941 line_ptr += bytes_read;
3945 complain (&dwarf2_mangled_line_number_section);
3950 record_line (current_subfile, line, address);
3953 case DW_LNS_advance_pc:
3954 address += lh.minimum_instruction_length
3955 * read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3956 line_ptr += bytes_read;
3958 case DW_LNS_advance_line:
3959 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
3960 line_ptr += bytes_read;
3962 case DW_LNS_set_file:
3963 /* The file and directory tables are 0 based, the references
3965 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3966 line_ptr += bytes_read;
3967 dwarf2_start_subfile
3968 (files.files[file - 1].name,
3969 (files.files[file - 1].dir
3970 ? dirs.dirs[files.files[file - 1].dir - 1]
3973 case DW_LNS_set_column:
3974 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3975 line_ptr += bytes_read;
3977 case DW_LNS_negate_stmt:
3978 is_stmt = (!is_stmt);
3980 case DW_LNS_set_basic_block:
3983 case DW_LNS_const_add_pc:
3984 address += (255 - lh.opcode_base) / lh.line_range;
3986 case DW_LNS_fixed_advance_pc:
3987 address += read_2_bytes (abfd, line_ptr);
3990 default: /* special operand */
3991 adj_opcode = op_code - lh.opcode_base;
3992 address += (adj_opcode / lh.line_range)
3993 * lh.minimum_instruction_length;
3994 line += lh.line_base + (adj_opcode % lh.line_range);
3995 /* append row to matrix using current values */
3996 record_line (current_subfile, line, address);
4002 do_cleanups (back_to);
4005 /* Start a subfile for DWARF. FILENAME is the name of the file and
4006 DIRNAME the name of the source directory which contains FILENAME
4007 or NULL if not known.
4008 This routine tries to keep line numbers from identical absolute and
4009 relative file names in a common subfile.
4011 Using the `list' example from the GDB testsuite, which resides in
4012 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
4013 of /srcdir/list0.c yields the following debugging information for list0.c:
4015 DW_AT_name: /srcdir/list0.c
4016 DW_AT_comp_dir: /compdir
4017 files.files[0].name: list0.h
4018 files.files[0].dir: /srcdir
4019 files.files[1].name: list0.c
4020 files.files[1].dir: /srcdir
4022 The line number information for list0.c has to end up in a single
4023 subfile, so that `break /srcdir/list0.c:1' works as expected. */
4026 dwarf2_start_subfile (filename, dirname)
4030 /* If the filename isn't absolute, try to match an existing subfile
4031 with the full pathname. */
4033 if (*filename != '/' && dirname != NULL)
4035 struct subfile *subfile;
4036 char *fullname = concat (dirname, "/", filename, NULL);
4038 for (subfile = subfiles; subfile; subfile = subfile->next)
4040 if (STREQ (subfile->name, fullname))
4042 current_subfile = subfile;
4049 start_subfile (filename, dirname);
4052 /* Given a pointer to a DWARF information entry, figure out if we need
4053 to make a symbol table entry for it, and if so, create a new entry
4054 and return a pointer to it.
4055 If TYPE is NULL, determine symbol type from the die, otherwise
4056 used the passed type.
4059 static struct symbol *
4060 new_symbol (die, type, objfile)
4061 struct die_info *die;
4063 struct objfile *objfile;
4065 struct symbol *sym = NULL;
4067 struct attribute *attr = NULL;
4068 struct attribute *attr2 = NULL;
4071 name = dwarf2_linkage_name (die);
4074 sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack,
4075 sizeof (struct symbol));
4076 OBJSTAT (objfile, n_syms++);
4077 memset (sym, 0, sizeof (struct symbol));
4078 SYMBOL_NAME (sym) = obsavestring (name, strlen (name),
4079 &objfile->symbol_obstack);
4081 /* Default assumptions.
4082 Use the passed type or decode it from the die. */
4083 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
4084 SYMBOL_CLASS (sym) = LOC_STATIC;
4086 SYMBOL_TYPE (sym) = type;
4088 SYMBOL_TYPE (sym) = die_type (die, objfile);
4089 attr = dwarf_attr (die, DW_AT_decl_line);
4092 SYMBOL_LINE (sym) = DW_UNSND (attr);
4095 /* If this symbol is from a C++ compilation, then attempt to
4096 cache the demangled form for future reference. This is a
4097 typical time versus space tradeoff, that was decided in favor
4098 of time because it sped up C++ symbol lookups by a factor of
4101 SYMBOL_LANGUAGE (sym) = cu_language;
4102 SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack);
4106 attr = dwarf_attr (die, DW_AT_low_pc);
4109 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
4111 SYMBOL_CLASS (sym) = LOC_LABEL;
4113 case DW_TAG_subprogram:
4114 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
4116 SYMBOL_CLASS (sym) = LOC_BLOCK;
4117 attr2 = dwarf_attr (die, DW_AT_external);
4118 if (attr2 && (DW_UNSND (attr2) != 0))
4120 add_symbol_to_list (sym, &global_symbols);
4124 add_symbol_to_list (sym, list_in_scope);
4127 case DW_TAG_variable:
4128 /* Compilation with minimal debug info may result in variables
4129 with missing type entries. Change the misleading `void' type
4130 to something sensible. */
4131 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
4132 SYMBOL_TYPE (sym) = init_type (TYPE_CODE_INT,
4133 TARGET_INT_BIT / HOST_CHAR_BIT, 0,
4134 "<variable, no debug info>",
4136 attr = dwarf_attr (die, DW_AT_const_value);
4139 dwarf2_const_value (attr, sym, objfile);
4140 attr2 = dwarf_attr (die, DW_AT_external);
4141 if (attr2 && (DW_UNSND (attr2) != 0))
4142 add_symbol_to_list (sym, &global_symbols);
4144 add_symbol_to_list (sym, list_in_scope);
4147 attr = dwarf_attr (die, DW_AT_location);
4150 attr2 = dwarf_attr (die, DW_AT_external);
4151 if (attr2 && (DW_UNSND (attr2) != 0))
4153 SYMBOL_VALUE_ADDRESS (sym) =
4154 decode_locdesc (DW_BLOCK (attr), objfile);
4155 add_symbol_to_list (sym, &global_symbols);
4157 /* In shared libraries the address of the variable
4158 in the location descriptor might still be relocatable,
4159 so its value could be zero.
4160 Enter the symbol as a LOC_UNRESOLVED symbol, if its
4161 value is zero, the address of the variable will then
4162 be determined from the minimal symbol table whenever
4163 the variable is referenced. */
4164 if (SYMBOL_VALUE_ADDRESS (sym))
4166 SYMBOL_VALUE_ADDRESS (sym) += baseaddr;
4167 SYMBOL_CLASS (sym) = LOC_STATIC;
4170 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
4174 SYMBOL_VALUE (sym) = addr =
4175 decode_locdesc (DW_BLOCK (attr), objfile);
4176 add_symbol_to_list (sym, list_in_scope);
4179 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
4183 SYMBOL_CLASS (sym) = LOC_REGISTER;
4187 SYMBOL_CLASS (sym) = LOC_BASEREG;
4188 SYMBOL_BASEREG (sym) = basereg;
4192 SYMBOL_CLASS (sym) = LOC_LOCAL;
4196 SYMBOL_CLASS (sym) = LOC_STATIC;
4197 SYMBOL_VALUE_ADDRESS (sym) = addr + baseaddr;
4203 /* We do not know the address of this symbol.
4204 If it is an external symbol and we have type information
4205 for it, enter the symbol as a LOC_UNRESOLVED symbol.
4206 The address of the variable will then be determined from
4207 the minimal symbol table whenever the variable is
4209 attr2 = dwarf_attr (die, DW_AT_external);
4210 if (attr2 && (DW_UNSND (attr2) != 0)
4211 && dwarf_attr (die, DW_AT_type) != NULL)
4213 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
4214 add_symbol_to_list (sym, &global_symbols);
4218 case DW_TAG_formal_parameter:
4219 attr = dwarf_attr (die, DW_AT_location);
4222 SYMBOL_VALUE (sym) = decode_locdesc (DW_BLOCK (attr), objfile);
4225 SYMBOL_CLASS (sym) = LOC_REGPARM;
4229 SYMBOL_CLASS (sym) = LOC_BASEREG_ARG;
4230 SYMBOL_BASEREG (sym) = basereg;
4234 SYMBOL_CLASS (sym) = LOC_ARG;
4237 attr = dwarf_attr (die, DW_AT_const_value);
4240 dwarf2_const_value (attr, sym, objfile);
4242 add_symbol_to_list (sym, list_in_scope);
4244 case DW_TAG_unspecified_parameters:
4245 /* From varargs functions; gdb doesn't seem to have any
4246 interest in this information, so just ignore it for now.
4249 case DW_TAG_class_type:
4250 case DW_TAG_structure_type:
4251 case DW_TAG_union_type:
4252 case DW_TAG_enumeration_type:
4253 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
4254 SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
4255 add_symbol_to_list (sym, list_in_scope);
4257 /* The semantics of C++ state that "struct foo { ... }" also
4258 defines a typedef for "foo". Synthesize a typedef symbol so
4259 that "ptype foo" works as expected. */
4260 if (cu_language == language_cplus)
4262 struct symbol *typedef_sym = (struct symbol *)
4263 obstack_alloc (&objfile->symbol_obstack,
4264 sizeof (struct symbol));
4265 *typedef_sym = *sym;
4266 SYMBOL_NAMESPACE (typedef_sym) = VAR_NAMESPACE;
4267 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
4268 TYPE_NAME (SYMBOL_TYPE (sym)) =
4269 obsavestring (SYMBOL_NAME (sym),
4270 strlen (SYMBOL_NAME (sym)),
4271 &objfile->type_obstack);
4272 add_symbol_to_list (typedef_sym, list_in_scope);
4275 case DW_TAG_typedef:
4276 case DW_TAG_base_type:
4277 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
4278 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
4279 add_symbol_to_list (sym, list_in_scope);
4281 case DW_TAG_enumerator:
4282 attr = dwarf_attr (die, DW_AT_const_value);
4285 dwarf2_const_value (attr, sym, objfile);
4287 add_symbol_to_list (sym, list_in_scope);
4290 /* Not a tag we recognize. Hopefully we aren't processing
4291 trash data, but since we must specifically ignore things
4292 we don't recognize, there is nothing else we should do at
4294 complain (&dwarf2_unsupported_tag, dwarf_tag_name (die->tag));
4301 /* Copy constant value from an attribute to a symbol. */
4304 dwarf2_const_value (attr, sym, objfile)
4305 struct attribute *attr;
4307 struct objfile *objfile;
4309 struct dwarf_block *blk;
4314 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != (unsigned int) address_size)
4315 complain (&dwarf2_const_value_length_mismatch, SYMBOL_NAME (sym),
4316 address_size, TYPE_LENGTH (SYMBOL_TYPE (sym)));
4317 SYMBOL_VALUE_BYTES (sym) = (char *)
4318 obstack_alloc (&objfile->symbol_obstack, address_size);
4319 store_address (SYMBOL_VALUE_BYTES (sym), address_size, DW_ADDR (attr));
4320 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
4322 case DW_FORM_block1:
4323 case DW_FORM_block2:
4324 case DW_FORM_block4:
4326 blk = DW_BLOCK (attr);
4327 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
4328 complain (&dwarf2_const_value_length_mismatch, SYMBOL_NAME (sym),
4329 blk->size, TYPE_LENGTH (SYMBOL_TYPE (sym)));
4330 SYMBOL_VALUE_BYTES (sym) = (char *)
4331 obstack_alloc (&objfile->symbol_obstack, blk->size);
4332 memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
4333 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
4341 SYMBOL_VALUE (sym) = DW_UNSND (attr);
4342 SYMBOL_CLASS (sym) = LOC_CONST;
4345 complain (&dwarf2_unsupported_const_value_attr,
4346 dwarf_form_name (attr->form));
4347 SYMBOL_VALUE (sym) = 0;
4348 SYMBOL_CLASS (sym) = LOC_CONST;
4353 /* Return the type of the die in question using its DW_AT_type attribute. */
4355 static struct type *
4356 die_type (die, objfile)
4357 struct die_info *die;
4358 struct objfile *objfile;
4361 struct attribute *type_attr;
4362 struct die_info *type_die;
4365 type_attr = dwarf_attr (die, DW_AT_type);
4368 /* A missing DW_AT_type represents a void type. */
4369 return dwarf2_fundamental_type (objfile, FT_VOID);
4373 ref = dwarf2_get_ref_die_offset (type_attr);
4374 type_die = follow_die_ref (ref);
4377 error ("Dwarf Error: Cannot find referent at offset %d.", ref);
4381 type = tag_type_to_type (type_die, objfile);
4384 dump_die (type_die);
4385 error ("Dwarf Error: Problem turning type die at offset into gdb type.");
4390 /* Return the containing type of the die in question using its
4391 DW_AT_containing_type attribute. */
4393 static struct type *
4394 die_containing_type (die, objfile)
4395 struct die_info *die;
4396 struct objfile *objfile;
4398 struct type *type = NULL;
4399 struct attribute *type_attr;
4400 struct die_info *type_die = NULL;
4403 type_attr = dwarf_attr (die, DW_AT_containing_type);
4406 ref = dwarf2_get_ref_die_offset (type_attr);
4407 type_die = follow_die_ref (ref);
4410 error ("Dwarf Error: Cannot find referent at offset %d.", ref);
4413 type = tag_type_to_type (type_die, objfile);
4418 dump_die (type_die);
4419 error ("Dwarf Error: Problem turning containing type into gdb type.");
4425 static struct type *
4426 type_at_offset (offset, objfile)
4427 unsigned int offset;
4428 struct objfile *objfile;
4430 struct die_info *die;
4433 die = follow_die_ref (offset);
4436 error ("Dwarf Error: Cannot find type referent at offset %d.", offset);
4439 type = tag_type_to_type (die, objfile);
4444 static struct type *
4445 tag_type_to_type (die, objfile)
4446 struct die_info *die;
4447 struct objfile *objfile;
4455 read_type_die (die, objfile);
4459 error ("Dwarf Error: Cannot find type of die.");
4466 read_type_die (die, objfile)
4467 struct die_info *die;
4468 struct objfile *objfile;
4472 case DW_TAG_class_type:
4473 case DW_TAG_structure_type:
4474 case DW_TAG_union_type:
4475 read_structure_scope (die, objfile);
4477 case DW_TAG_enumeration_type:
4478 read_enumeration (die, objfile);
4480 case DW_TAG_subprogram:
4481 case DW_TAG_subroutine_type:
4482 read_subroutine_type (die, objfile);
4484 case DW_TAG_array_type:
4485 read_array_type (die, objfile);
4487 case DW_TAG_pointer_type:
4488 read_tag_pointer_type (die, objfile);
4490 case DW_TAG_ptr_to_member_type:
4491 read_tag_ptr_to_member_type (die, objfile);
4493 case DW_TAG_reference_type:
4494 read_tag_reference_type (die, objfile);
4496 case DW_TAG_const_type:
4497 read_tag_const_type (die, objfile);
4499 case DW_TAG_volatile_type:
4500 read_tag_volatile_type (die, objfile);
4502 case DW_TAG_string_type:
4503 read_tag_string_type (die, objfile);
4505 case DW_TAG_typedef:
4506 read_typedef (die, objfile);
4508 case DW_TAG_base_type:
4509 read_base_type (die, objfile);
4512 complain (&dwarf2_unexpected_tag, dwarf_tag_name (die->tag));
4517 static struct type *
4518 dwarf_base_type (encoding, size, objfile)
4521 struct objfile *objfile;
4523 /* FIXME - this should not produce a new (struct type *)
4524 every time. It should cache base types. */
4528 case DW_ATE_address:
4529 type = dwarf2_fundamental_type (objfile, FT_VOID);
4531 case DW_ATE_boolean:
4532 type = dwarf2_fundamental_type (objfile, FT_BOOLEAN);
4534 case DW_ATE_complex_float:
4537 type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_COMPLEX);
4541 type = dwarf2_fundamental_type (objfile, FT_COMPLEX);
4547 type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT);
4551 type = dwarf2_fundamental_type (objfile, FT_FLOAT);
4558 type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR);
4561 type = dwarf2_fundamental_type (objfile, FT_SIGNED_SHORT);
4565 type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER);
4569 case DW_ATE_signed_char:
4570 type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR);
4572 case DW_ATE_unsigned:
4576 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR);
4579 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_SHORT);
4583 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_INTEGER);
4587 case DW_ATE_unsigned_char:
4588 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR);
4591 type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER);
4599 struct die_info *old_die;
4601 struct die_info *new_die;
4604 new_die = (struct die_info *) xmalloc (sizeof (struct die_info));
4605 memset (new_die, 0, sizeof (struct die_info));
4607 new_die->tag = old_die->tag;
4608 new_die->has_children = old_die->has_children;
4609 new_die->abbrev = old_die->abbrev;
4610 new_die->offset = old_die->offset;
4611 new_die->type = NULL;
4613 num_attrs = old_die->num_attrs;
4614 new_die->num_attrs = num_attrs;
4615 new_die->attrs = (struct attribute *)
4616 xmalloc (num_attrs * sizeof (struct attribute));
4618 for (i = 0; i < old_die->num_attrs; ++i)
4620 new_die->attrs[i].name = old_die->attrs[i].name;
4621 new_die->attrs[i].form = old_die->attrs[i].form;
4622 new_die->attrs[i].u.addr = old_die->attrs[i].u.addr;
4625 new_die->next = NULL;
4630 /* Return sibling of die, NULL if no sibling. */
4634 struct die_info *die;
4636 int nesting_level = 0;
4638 if (!die->has_children)
4640 if (die->next && (die->next->tag == 0))
4653 if (die->has_children)
4663 while (nesting_level);
4664 if (die && (die->tag == 0))
4675 /* Get linkage name of a die, return NULL if not found. */
4678 dwarf2_linkage_name (die)
4679 struct die_info *die;
4681 struct attribute *attr;
4683 attr = dwarf_attr (die, DW_AT_MIPS_linkage_name);
4684 if (attr && DW_STRING (attr))
4685 return DW_STRING (attr);
4686 attr = dwarf_attr (die, DW_AT_name);
4687 if (attr && DW_STRING (attr))
4688 return DW_STRING (attr);
4692 /* Convert a DIE tag into its string name. */
4695 dwarf_tag_name (tag)
4696 register unsigned tag;
4700 case DW_TAG_padding:
4701 return "DW_TAG_padding";
4702 case DW_TAG_array_type:
4703 return "DW_TAG_array_type";
4704 case DW_TAG_class_type:
4705 return "DW_TAG_class_type";
4706 case DW_TAG_entry_point:
4707 return "DW_TAG_entry_point";
4708 case DW_TAG_enumeration_type:
4709 return "DW_TAG_enumeration_type";
4710 case DW_TAG_formal_parameter:
4711 return "DW_TAG_formal_parameter";
4712 case DW_TAG_imported_declaration:
4713 return "DW_TAG_imported_declaration";
4715 return "DW_TAG_label";
4716 case DW_TAG_lexical_block:
4717 return "DW_TAG_lexical_block";
4719 return "DW_TAG_member";
4720 case DW_TAG_pointer_type:
4721 return "DW_TAG_pointer_type";
4722 case DW_TAG_reference_type:
4723 return "DW_TAG_reference_type";
4724 case DW_TAG_compile_unit:
4725 return "DW_TAG_compile_unit";
4726 case DW_TAG_string_type:
4727 return "DW_TAG_string_type";
4728 case DW_TAG_structure_type:
4729 return "DW_TAG_structure_type";
4730 case DW_TAG_subroutine_type:
4731 return "DW_TAG_subroutine_type";
4732 case DW_TAG_typedef:
4733 return "DW_TAG_typedef";
4734 case DW_TAG_union_type:
4735 return "DW_TAG_union_type";
4736 case DW_TAG_unspecified_parameters:
4737 return "DW_TAG_unspecified_parameters";
4738 case DW_TAG_variant:
4739 return "DW_TAG_variant";
4740 case DW_TAG_common_block:
4741 return "DW_TAG_common_block";
4742 case DW_TAG_common_inclusion:
4743 return "DW_TAG_common_inclusion";
4744 case DW_TAG_inheritance:
4745 return "DW_TAG_inheritance";
4746 case DW_TAG_inlined_subroutine:
4747 return "DW_TAG_inlined_subroutine";
4749 return "DW_TAG_module";
4750 case DW_TAG_ptr_to_member_type:
4751 return "DW_TAG_ptr_to_member_type";
4752 case DW_TAG_set_type:
4753 return "DW_TAG_set_type";
4754 case DW_TAG_subrange_type:
4755 return "DW_TAG_subrange_type";
4756 case DW_TAG_with_stmt:
4757 return "DW_TAG_with_stmt";
4758 case DW_TAG_access_declaration:
4759 return "DW_TAG_access_declaration";
4760 case DW_TAG_base_type:
4761 return "DW_TAG_base_type";
4762 case DW_TAG_catch_block:
4763 return "DW_TAG_catch_block";
4764 case DW_TAG_const_type:
4765 return "DW_TAG_const_type";
4766 case DW_TAG_constant:
4767 return "DW_TAG_constant";
4768 case DW_TAG_enumerator:
4769 return "DW_TAG_enumerator";
4770 case DW_TAG_file_type:
4771 return "DW_TAG_file_type";
4773 return "DW_TAG_friend";
4774 case DW_TAG_namelist:
4775 return "DW_TAG_namelist";
4776 case DW_TAG_namelist_item:
4777 return "DW_TAG_namelist_item";
4778 case DW_TAG_packed_type:
4779 return "DW_TAG_packed_type";
4780 case DW_TAG_subprogram:
4781 return "DW_TAG_subprogram";
4782 case DW_TAG_template_type_param:
4783 return "DW_TAG_template_type_param";
4784 case DW_TAG_template_value_param:
4785 return "DW_TAG_template_value_param";
4786 case DW_TAG_thrown_type:
4787 return "DW_TAG_thrown_type";
4788 case DW_TAG_try_block:
4789 return "DW_TAG_try_block";
4790 case DW_TAG_variant_part:
4791 return "DW_TAG_variant_part";
4792 case DW_TAG_variable:
4793 return "DW_TAG_variable";
4794 case DW_TAG_volatile_type:
4795 return "DW_TAG_volatile_type";
4796 case DW_TAG_MIPS_loop:
4797 return "DW_TAG_MIPS_loop";
4798 case DW_TAG_format_label:
4799 return "DW_TAG_format_label";
4800 case DW_TAG_function_template:
4801 return "DW_TAG_function_template";
4802 case DW_TAG_class_template:
4803 return "DW_TAG_class_template";
4805 return "DW_TAG_<unknown>";
4809 /* Convert a DWARF attribute code into its string name. */
4812 dwarf_attr_name (attr)
4813 register unsigned attr;
4818 return "DW_AT_sibling";
4819 case DW_AT_location:
4820 return "DW_AT_location";
4822 return "DW_AT_name";
4823 case DW_AT_ordering:
4824 return "DW_AT_ordering";
4825 case DW_AT_subscr_data:
4826 return "DW_AT_subscr_data";
4827 case DW_AT_byte_size:
4828 return "DW_AT_byte_size";
4829 case DW_AT_bit_offset:
4830 return "DW_AT_bit_offset";
4831 case DW_AT_bit_size:
4832 return "DW_AT_bit_size";
4833 case DW_AT_element_list:
4834 return "DW_AT_element_list";
4835 case DW_AT_stmt_list:
4836 return "DW_AT_stmt_list";
4838 return "DW_AT_low_pc";
4840 return "DW_AT_high_pc";
4841 case DW_AT_language:
4842 return "DW_AT_language";
4844 return "DW_AT_member";
4846 return "DW_AT_discr";
4847 case DW_AT_discr_value:
4848 return "DW_AT_discr_value";
4849 case DW_AT_visibility:
4850 return "DW_AT_visibility";
4852 return "DW_AT_import";
4853 case DW_AT_string_length:
4854 return "DW_AT_string_length";
4855 case DW_AT_common_reference:
4856 return "DW_AT_common_reference";
4857 case DW_AT_comp_dir:
4858 return "DW_AT_comp_dir";
4859 case DW_AT_const_value:
4860 return "DW_AT_const_value";
4861 case DW_AT_containing_type:
4862 return "DW_AT_containing_type";
4863 case DW_AT_default_value:
4864 return "DW_AT_default_value";
4866 return "DW_AT_inline";
4867 case DW_AT_is_optional:
4868 return "DW_AT_is_optional";
4869 case DW_AT_lower_bound:
4870 return "DW_AT_lower_bound";
4871 case DW_AT_producer:
4872 return "DW_AT_producer";
4873 case DW_AT_prototyped:
4874 return "DW_AT_prototyped";
4875 case DW_AT_return_addr:
4876 return "DW_AT_return_addr";
4877 case DW_AT_start_scope:
4878 return "DW_AT_start_scope";
4879 case DW_AT_stride_size:
4880 return "DW_AT_stride_size";
4881 case DW_AT_upper_bound:
4882 return "DW_AT_upper_bound";
4883 case DW_AT_abstract_origin:
4884 return "DW_AT_abstract_origin";
4885 case DW_AT_accessibility:
4886 return "DW_AT_accessibility";
4887 case DW_AT_address_class:
4888 return "DW_AT_address_class";
4889 case DW_AT_artificial:
4890 return "DW_AT_artificial";
4891 case DW_AT_base_types:
4892 return "DW_AT_base_types";
4893 case DW_AT_calling_convention:
4894 return "DW_AT_calling_convention";
4896 return "DW_AT_count";
4897 case DW_AT_data_member_location:
4898 return "DW_AT_data_member_location";
4899 case DW_AT_decl_column:
4900 return "DW_AT_decl_column";
4901 case DW_AT_decl_file:
4902 return "DW_AT_decl_file";
4903 case DW_AT_decl_line:
4904 return "DW_AT_decl_line";
4905 case DW_AT_declaration:
4906 return "DW_AT_declaration";
4907 case DW_AT_discr_list:
4908 return "DW_AT_discr_list";
4909 case DW_AT_encoding:
4910 return "DW_AT_encoding";
4911 case DW_AT_external:
4912 return "DW_AT_external";
4913 case DW_AT_frame_base:
4914 return "DW_AT_frame_base";
4916 return "DW_AT_friend";
4917 case DW_AT_identifier_case:
4918 return "DW_AT_identifier_case";
4919 case DW_AT_macro_info:
4920 return "DW_AT_macro_info";
4921 case DW_AT_namelist_items:
4922 return "DW_AT_namelist_items";
4923 case DW_AT_priority:
4924 return "DW_AT_priority";
4926 return "DW_AT_segment";
4927 case DW_AT_specification:
4928 return "DW_AT_specification";
4929 case DW_AT_static_link:
4930 return "DW_AT_static_link";
4932 return "DW_AT_type";
4933 case DW_AT_use_location:
4934 return "DW_AT_use_location";
4935 case DW_AT_variable_parameter:
4936 return "DW_AT_variable_parameter";
4937 case DW_AT_virtuality:
4938 return "DW_AT_virtuality";
4939 case DW_AT_vtable_elem_location:
4940 return "DW_AT_vtable_elem_location";
4943 case DW_AT_MIPS_fde:
4944 return "DW_AT_MIPS_fde";
4945 case DW_AT_MIPS_loop_begin:
4946 return "DW_AT_MIPS_loop_begin";
4947 case DW_AT_MIPS_tail_loop_begin:
4948 return "DW_AT_MIPS_tail_loop_begin";
4949 case DW_AT_MIPS_epilog_begin:
4950 return "DW_AT_MIPS_epilog_begin";
4951 case DW_AT_MIPS_loop_unroll_factor:
4952 return "DW_AT_MIPS_loop_unroll_factor";
4953 case DW_AT_MIPS_software_pipeline_depth:
4954 return "DW_AT_MIPS_software_pipeline_depth";
4955 case DW_AT_MIPS_linkage_name:
4956 return "DW_AT_MIPS_linkage_name";
4959 case DW_AT_sf_names:
4960 return "DW_AT_sf_names";
4961 case DW_AT_src_info:
4962 return "DW_AT_src_info";
4963 case DW_AT_mac_info:
4964 return "DW_AT_mac_info";
4965 case DW_AT_src_coords:
4966 return "DW_AT_src_coords";
4967 case DW_AT_body_begin:
4968 return "DW_AT_body_begin";
4969 case DW_AT_body_end:
4970 return "DW_AT_body_end";
4972 return "DW_AT_<unknown>";
4976 /* Convert a DWARF value form code into its string name. */
4979 dwarf_form_name (form)
4980 register unsigned form;
4985 return "DW_FORM_addr";
4986 case DW_FORM_block2:
4987 return "DW_FORM_block2";
4988 case DW_FORM_block4:
4989 return "DW_FORM_block4";
4991 return "DW_FORM_data2";
4993 return "DW_FORM_data4";
4995 return "DW_FORM_data8";
4996 case DW_FORM_string:
4997 return "DW_FORM_string";
4999 return "DW_FORM_block";
5000 case DW_FORM_block1:
5001 return "DW_FORM_block1";
5003 return "DW_FORM_data1";
5005 return "DW_FORM_flag";
5007 return "DW_FORM_sdata";
5009 return "DW_FORM_strp";
5011 return "DW_FORM_udata";
5012 case DW_FORM_ref_addr:
5013 return "DW_FORM_ref_addr";
5015 return "DW_FORM_ref1";
5017 return "DW_FORM_ref2";
5019 return "DW_FORM_ref4";
5021 return "DW_FORM_ref8";
5022 case DW_FORM_ref_udata:
5023 return "DW_FORM_ref_udata";
5024 case DW_FORM_indirect:
5025 return "DW_FORM_indirect";
5027 return "DW_FORM_<unknown>";
5031 /* Convert a DWARF stack opcode into its string name. */
5034 dwarf_stack_op_name (op)
5035 register unsigned op;
5040 return "DW_OP_addr";
5042 return "DW_OP_deref";
5044 return "DW_OP_const1u";
5046 return "DW_OP_const1s";
5048 return "DW_OP_const2u";
5050 return "DW_OP_const2s";
5052 return "DW_OP_const4u";
5054 return "DW_OP_const4s";
5056 return "DW_OP_const8u";
5058 return "DW_OP_const8s";
5060 return "DW_OP_constu";
5062 return "DW_OP_consts";
5066 return "DW_OP_drop";
5068 return "DW_OP_over";
5070 return "DW_OP_pick";
5072 return "DW_OP_swap";
5076 return "DW_OP_xderef";
5084 return "DW_OP_minus";
5096 return "DW_OP_plus";
5097 case DW_OP_plus_uconst:
5098 return "DW_OP_plus_uconst";
5104 return "DW_OP_shra";
5122 return "DW_OP_skip";
5124 return "DW_OP_lit0";
5126 return "DW_OP_lit1";
5128 return "DW_OP_lit2";
5130 return "DW_OP_lit3";
5132 return "DW_OP_lit4";
5134 return "DW_OP_lit5";
5136 return "DW_OP_lit6";
5138 return "DW_OP_lit7";
5140 return "DW_OP_lit8";
5142 return "DW_OP_lit9";
5144 return "DW_OP_lit10";
5146 return "DW_OP_lit11";
5148 return "DW_OP_lit12";
5150 return "DW_OP_lit13";
5152 return "DW_OP_lit14";
5154 return "DW_OP_lit15";
5156 return "DW_OP_lit16";
5158 return "DW_OP_lit17";
5160 return "DW_OP_lit18";
5162 return "DW_OP_lit19";
5164 return "DW_OP_lit20";
5166 return "DW_OP_lit21";
5168 return "DW_OP_lit22";
5170 return "DW_OP_lit23";
5172 return "DW_OP_lit24";
5174 return "DW_OP_lit25";
5176 return "DW_OP_lit26";
5178 return "DW_OP_lit27";
5180 return "DW_OP_lit28";
5182 return "DW_OP_lit29";
5184 return "DW_OP_lit30";
5186 return "DW_OP_lit31";
5188 return "DW_OP_reg0";
5190 return "DW_OP_reg1";
5192 return "DW_OP_reg2";
5194 return "DW_OP_reg3";
5196 return "DW_OP_reg4";
5198 return "DW_OP_reg5";
5200 return "DW_OP_reg6";
5202 return "DW_OP_reg7";
5204 return "DW_OP_reg8";
5206 return "DW_OP_reg9";
5208 return "DW_OP_reg10";
5210 return "DW_OP_reg11";
5212 return "DW_OP_reg12";
5214 return "DW_OP_reg13";
5216 return "DW_OP_reg14";
5218 return "DW_OP_reg15";
5220 return "DW_OP_reg16";
5222 return "DW_OP_reg17";
5224 return "DW_OP_reg18";
5226 return "DW_OP_reg19";
5228 return "DW_OP_reg20";
5230 return "DW_OP_reg21";
5232 return "DW_OP_reg22";
5234 return "DW_OP_reg23";
5236 return "DW_OP_reg24";
5238 return "DW_OP_reg25";
5240 return "DW_OP_reg26";
5242 return "DW_OP_reg27";
5244 return "DW_OP_reg28";
5246 return "DW_OP_reg29";
5248 return "DW_OP_reg30";
5250 return "DW_OP_reg31";
5252 return "DW_OP_breg0";
5254 return "DW_OP_breg1";
5256 return "DW_OP_breg2";
5258 return "DW_OP_breg3";
5260 return "DW_OP_breg4";
5262 return "DW_OP_breg5";
5264 return "DW_OP_breg6";
5266 return "DW_OP_breg7";
5268 return "DW_OP_breg8";
5270 return "DW_OP_breg9";
5272 return "DW_OP_breg10";
5274 return "DW_OP_breg11";
5276 return "DW_OP_breg12";
5278 return "DW_OP_breg13";
5280 return "DW_OP_breg14";
5282 return "DW_OP_breg15";
5284 return "DW_OP_breg16";
5286 return "DW_OP_breg17";
5288 return "DW_OP_breg18";
5290 return "DW_OP_breg19";
5292 return "DW_OP_breg20";
5294 return "DW_OP_breg21";
5296 return "DW_OP_breg22";
5298 return "DW_OP_breg23";
5300 return "DW_OP_breg24";
5302 return "DW_OP_breg25";
5304 return "DW_OP_breg26";
5306 return "DW_OP_breg27";
5308 return "DW_OP_breg28";
5310 return "DW_OP_breg29";
5312 return "DW_OP_breg30";
5314 return "DW_OP_breg31";
5316 return "DW_OP_regx";
5318 return "DW_OP_fbreg";
5320 return "DW_OP_bregx";
5322 return "DW_OP_piece";
5323 case DW_OP_deref_size:
5324 return "DW_OP_deref_size";
5325 case DW_OP_xderef_size:
5326 return "DW_OP_xderef_size";
5330 return "OP_<unknown>";
5335 dwarf_bool_name (bool)
5344 /* Convert a DWARF type code into its string name. */
5347 dwarf_type_encoding_name (enc)
5348 register unsigned enc;
5352 case DW_ATE_address:
5353 return "DW_ATE_address";
5354 case DW_ATE_boolean:
5355 return "DW_ATE_boolean";
5356 case DW_ATE_complex_float:
5357 return "DW_ATE_complex_float";
5359 return "DW_ATE_float";
5361 return "DW_ATE_signed";
5362 case DW_ATE_signed_char:
5363 return "DW_ATE_signed_char";
5364 case DW_ATE_unsigned:
5365 return "DW_ATE_unsigned";
5366 case DW_ATE_unsigned_char:
5367 return "DW_ATE_unsigned_char";
5369 return "DW_ATE_<unknown>";
5373 /* Convert a DWARF call frame info operation to its string name. */
5377 dwarf_cfi_name (cfi_opc)
5378 register unsigned cfi_opc;
5382 case DW_CFA_advance_loc:
5383 return "DW_CFA_advance_loc";
5385 return "DW_CFA_offset";
5386 case DW_CFA_restore:
5387 return "DW_CFA_restore";
5389 return "DW_CFA_nop";
5390 case DW_CFA_set_loc:
5391 return "DW_CFA_set_loc";
5392 case DW_CFA_advance_loc1:
5393 return "DW_CFA_advance_loc1";
5394 case DW_CFA_advance_loc2:
5395 return "DW_CFA_advance_loc2";
5396 case DW_CFA_advance_loc4:
5397 return "DW_CFA_advance_loc4";
5398 case DW_CFA_offset_extended:
5399 return "DW_CFA_offset_extended";
5400 case DW_CFA_restore_extended:
5401 return "DW_CFA_restore_extended";
5402 case DW_CFA_undefined:
5403 return "DW_CFA_undefined";
5404 case DW_CFA_same_value:
5405 return "DW_CFA_same_value";
5406 case DW_CFA_register:
5407 return "DW_CFA_register";
5408 case DW_CFA_remember_state:
5409 return "DW_CFA_remember_state";
5410 case DW_CFA_restore_state:
5411 return "DW_CFA_restore_state";
5412 case DW_CFA_def_cfa:
5413 return "DW_CFA_def_cfa";
5414 case DW_CFA_def_cfa_register:
5415 return "DW_CFA_def_cfa_register";
5416 case DW_CFA_def_cfa_offset:
5417 return "DW_CFA_def_cfa_offset";
5418 /* SGI/MIPS specific */
5419 case DW_CFA_MIPS_advance_loc8:
5420 return "DW_CFA_MIPS_advance_loc8";
5422 return "DW_CFA_<unknown>";
5429 struct die_info *die;
5433 fprintf (stderr, "Die: %s (abbrev = %d, offset = %d)\n",
5434 dwarf_tag_name (die->tag), die->abbrev, die->offset);
5435 fprintf (stderr, "\thas children: %s\n",
5436 dwarf_bool_name (die->has_children));
5438 fprintf (stderr, "\tattributes:\n");
5439 for (i = 0; i < die->num_attrs; ++i)
5441 fprintf (stderr, "\t\t%s (%s) ",
5442 dwarf_attr_name (die->attrs[i].name),
5443 dwarf_form_name (die->attrs[i].form));
5444 switch (die->attrs[i].form)
5446 case DW_FORM_ref_addr:
5448 fprintf (stderr, "address: ");
5449 print_address_numeric (DW_ADDR (&die->attrs[i]), 1, stderr);
5451 case DW_FORM_block2:
5452 case DW_FORM_block4:
5454 case DW_FORM_block1:
5455 fprintf (stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
5465 fprintf (stderr, "constant: %d", DW_UNSND (&die->attrs[i]));
5467 case DW_FORM_string:
5468 fprintf (stderr, "string: \"%s\"",
5469 DW_STRING (&die->attrs[i])
5470 ? DW_STRING (&die->attrs[i]) : "");
5473 if (DW_UNSND (&die->attrs[i]))
5474 fprintf (stderr, "flag: TRUE");
5476 fprintf (stderr, "flag: FALSE");
5478 case DW_FORM_strp: /* we do not support separate string
5480 case DW_FORM_indirect: /* we do not handle indirect yet */
5481 case DW_FORM_data8: /* we do not have 64 bit quantities */
5483 fprintf (stderr, "unsupported attribute form: %d.",
5484 die->attrs[i].form);
5486 fprintf (stderr, "\n");
5492 struct die_info *die;
5502 store_in_ref_table (offset, die)
5503 unsigned int offset;
5504 struct die_info *die;
5507 struct die_info *old;
5509 h = (offset % REF_HASH_SIZE);
5510 old = die_ref_table[h];
5511 die->next_ref = old;
5512 die_ref_table[h] = die;
5517 dwarf2_empty_die_ref_table ()
5519 memset (die_ref_table, 0, sizeof (die_ref_table));
5523 dwarf2_get_ref_die_offset (attr)
5524 struct attribute *attr;
5526 unsigned int result = 0;
5530 case DW_FORM_ref_addr:
5531 result = DW_ADDR (attr);
5536 case DW_FORM_ref_udata:
5537 result = cu_header_offset + DW_UNSND (attr);
5540 complain (&dwarf2_unsupported_die_ref_attr, dwarf_form_name (attr->form));
5546 follow_die_ref (offset)
5547 unsigned int offset;
5549 struct die_info *die;
5552 h = (offset % REF_HASH_SIZE);
5553 die = die_ref_table[h];
5556 if (die->offset == offset)
5560 die = die->next_ref;
5565 static struct type *
5566 dwarf2_fundamental_type (objfile, typeid)
5567 struct objfile *objfile;
5570 if (typeid < 0 || typeid >= FT_NUM_MEMBERS)
5572 error ("Dwarf Error: internal error - invalid fundamental type id %d.",
5576 /* Look for this particular type in the fundamental type vector. If
5577 one is not found, create and install one appropriate for the
5578 current language and the current target machine. */
5580 if (ftypes[typeid] == NULL)
5582 ftypes[typeid] = cu_language_defn->la_fund_type (objfile, typeid);
5585 return (ftypes[typeid]);
5588 /* Decode simple location descriptions.
5589 Given a pointer to a dwarf block that defines a location, compute
5590 the location and return the value.
5592 FIXME: This is a kludge until we figure out a better
5593 way to handle the location descriptions.
5594 Gdb's design does not mesh well with the DWARF2 notion of a location
5595 computing interpreter, which is a shame because the flexibility goes unused.
5596 FIXME: Implement more operations as necessary.
5598 A location description containing no operations indicates that the
5599 object is optimized out. The global optimized_out flag is set for
5600 those, the return value is meaningless.
5602 When the result is a register number, the global isreg flag is set,
5603 otherwise it is cleared.
5605 When the result is a base register offset, the global offreg flag is set
5606 and the register number is returned in basereg, otherwise it is cleared.
5608 When the DW_OP_fbreg operation is encountered without a corresponding
5609 DW_AT_frame_base attribute, the global islocal flag is set.
5610 Hopefully the machine dependent code knows how to set up a virtual
5611 frame pointer for the local references.
5613 Note that stack[0] is unused except as a default error return.
5614 Note that stack overflow is not yet handled. */
5617 decode_locdesc (blk, objfile)
5618 struct dwarf_block *blk;
5619 struct objfile *objfile;
5622 int size = blk->size;
5623 char *data = blk->data;
5624 CORE_ADDR stack[64];
5626 unsigned int bytes_read, unsnd;
5676 stack[++stacki] = op - DW_OP_reg0;
5681 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
5683 #if defined(HARRIS_TARGET) && defined(_M88K)
5684 /* The Harris 88110 gdb ports have long kept their special reg
5685 numbers between their gp-regs and their x-regs. This is
5686 not how our dwarf is generated. Punt. */
5689 stack[++stacki] = unsnd;
5725 basereg = op - DW_OP_breg0;
5726 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
5731 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
5733 if (frame_base_reg >= 0)
5736 basereg = frame_base_reg;
5737 stack[stacki] += frame_base_offset;
5741 complain (&dwarf2_missing_at_frame_base);
5747 stack[++stacki] = read_address (objfile->obfd, &data[i]);
5752 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
5757 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
5762 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
5767 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
5772 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
5777 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
5782 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
5788 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
5793 stack[stacki - 1] += stack[stacki];
5797 case DW_OP_plus_uconst:
5798 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
5803 stack[stacki - 1] = stack[stacki] - stack[stacki - 1];
5808 complain (&dwarf2_unsupported_stack_op, dwarf_stack_op_name(op));
5809 return (stack[stacki]);
5812 return (stack[stacki]);
5815 /* memory allocation interface */
5819 dwarf2_free_tmp_obstack (ignore)
5822 obstack_free (&dwarf2_tmp_obstack, NULL);
5825 static struct dwarf_block *
5826 dwarf_alloc_block ()
5828 struct dwarf_block *blk;
5830 blk = (struct dwarf_block *)
5831 obstack_alloc (&dwarf2_tmp_obstack, sizeof (struct dwarf_block));
5835 static struct abbrev_info *
5836 dwarf_alloc_abbrev ()
5838 struct abbrev_info *abbrev;
5840 abbrev = (struct abbrev_info *) xmalloc (sizeof (struct abbrev_info));
5841 memset (abbrev, 0, sizeof (struct abbrev_info));
5845 static struct die_info *
5848 struct die_info *die;
5850 die = (struct die_info *) xmalloc (sizeof (struct die_info));
5851 memset (die, 0, sizeof (struct die_info));