1 /* DWARF 2 debugging format support for GDB.
2 Copyright 1994, 1995, 1996, 1997, 1998 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)
1006 info_ptr = scan_partial_symbols (info_ptr, objfile, &lowpc, &highpc);
1008 /* If the compilation unit didn't have an explicit address range,
1009 then use the information extracted from its child dies. */
1010 if (!comp_unit_has_pc_info)
1012 comp_unit_die.lowpc = lowpc;
1013 comp_unit_die.highpc = highpc;
1016 pst->textlow = comp_unit_die.lowpc + baseaddr;
1017 pst->texthigh = comp_unit_die.highpc + baseaddr;
1019 pst->n_global_syms = objfile->global_psymbols.next -
1020 (objfile->global_psymbols.list + pst->globals_offset);
1021 pst->n_static_syms = objfile->static_psymbols.next -
1022 (objfile->static_psymbols.list + pst->statics_offset);
1023 sort_pst_symbols (pst);
1025 /* If there is already a psymtab or symtab for a file of this
1026 name, remove it. (If there is a symtab, more drastic things
1027 also happen.) This happens in VxWorks. */
1028 free_named_symtabs (pst->filename);
1030 info_ptr = beg_of_comp_unit + cu_header.length + 4;
1032 do_cleanups (back_to);
1035 /* Read in all interesting dies to the end of the compilation unit. */
1038 scan_partial_symbols (info_ptr, objfile, lowpc, highpc)
1040 struct objfile *objfile;
1044 bfd *abfd = objfile->obfd;
1045 struct partial_die_info pdi;
1047 /* This function is called after we've read in the comp_unit_die in
1048 order to read its children. We start the nesting level at 1 since
1049 we have pushed 1 level down in order to read the comp unit's children.
1050 The comp unit itself is at level 0, so we stop reading when we pop
1051 back to that level. */
1053 int nesting_level = 1;
1056 *lowpc = ((CORE_ADDR) -1);
1057 *highpc = ((CORE_ADDR) 0);
1059 while (nesting_level)
1061 info_ptr = read_partial_die (&pdi, abfd, info_ptr, &has_pc_info);
1067 case DW_TAG_subprogram:
1070 if (pdi.lowpc < *lowpc)
1074 if (pdi.highpc > *highpc)
1076 *highpc = pdi.highpc;
1078 if ((pdi.is_external || nesting_level == 1)
1079 && !pdi.is_declaration)
1081 add_partial_symbol (&pdi, objfile);
1085 case DW_TAG_variable:
1086 case DW_TAG_typedef:
1087 case DW_TAG_class_type:
1088 case DW_TAG_structure_type:
1089 case DW_TAG_union_type:
1090 case DW_TAG_enumeration_type:
1091 if ((pdi.is_external || nesting_level == 1)
1092 && !pdi.is_declaration)
1094 add_partial_symbol (&pdi, objfile);
1097 case DW_TAG_enumerator:
1098 /* File scope enumerators are added to the partial symbol
1100 if (nesting_level == 2)
1101 add_partial_symbol (&pdi, objfile);
1103 case DW_TAG_base_type:
1104 /* File scope base type definitions are added to the partial
1106 if (nesting_level == 1)
1107 add_partial_symbol (&pdi, objfile);
1114 /* If the die has a sibling, skip to the sibling.
1115 Do not skip enumeration types, we want to record their
1117 if (pdi.sibling && pdi.tag != DW_TAG_enumeration_type)
1119 info_ptr = pdi.sibling;
1121 else if (pdi.has_children)
1123 /* Die has children, but the optional DW_AT_sibling attribute
1134 /* If we didn't find a lowpc, set it to highpc to avoid complaints
1135 from `maint check'. */
1136 if (*lowpc == ((CORE_ADDR) -1))
1142 add_partial_symbol (pdi, objfile)
1143 struct partial_die_info *pdi;
1144 struct objfile *objfile;
1150 case DW_TAG_subprogram:
1151 if (pdi->is_external)
1153 /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
1154 mst_text, objfile);*/
1155 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1156 VAR_NAMESPACE, LOC_BLOCK,
1157 &objfile->global_psymbols,
1158 0, pdi->lowpc + baseaddr, cu_language, objfile);
1162 /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
1163 mst_file_text, objfile);*/
1164 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1165 VAR_NAMESPACE, LOC_BLOCK,
1166 &objfile->static_psymbols,
1167 0, pdi->lowpc + baseaddr, cu_language, objfile);
1170 case DW_TAG_variable:
1171 if (pdi->is_external)
1174 Don't enter into the minimal symbol tables as there is
1175 a minimal symbol table entry from the ELF symbols already.
1176 Enter into partial symbol table if it has a location
1177 descriptor or a type.
1178 If the location descriptor is missing, new_symbol will create
1179 a LOC_UNRESOLVED symbol, the address of the variable will then
1180 be determined from the minimal symbol table whenever the variable
1182 The address for the partial symbol table entry is not
1183 used by GDB, but it comes in handy for debugging partial symbol
1187 addr = decode_locdesc (pdi->locdesc, objfile);
1188 if (pdi->locdesc || pdi->has_type)
1189 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1190 VAR_NAMESPACE, LOC_STATIC,
1191 &objfile->global_psymbols,
1192 0, addr + baseaddr, cu_language, objfile);
1196 /* Static Variable. Skip symbols without location descriptors. */
1197 if (pdi->locdesc == NULL)
1199 addr = decode_locdesc (pdi->locdesc, objfile);
1200 /*prim_record_minimal_symbol (pdi->name, addr + baseaddr,
1201 mst_file_data, objfile);*/
1202 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1203 VAR_NAMESPACE, LOC_STATIC,
1204 &objfile->static_psymbols,
1205 0, addr + baseaddr, cu_language, objfile);
1208 case DW_TAG_typedef:
1209 case DW_TAG_base_type:
1210 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1211 VAR_NAMESPACE, LOC_TYPEDEF,
1212 &objfile->static_psymbols,
1213 0, (CORE_ADDR) 0, cu_language, objfile);
1215 case DW_TAG_class_type:
1216 case DW_TAG_structure_type:
1217 case DW_TAG_union_type:
1218 case DW_TAG_enumeration_type:
1219 /* Skip aggregate types without children, these are external
1221 if (pdi->has_children == 0)
1223 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1224 STRUCT_NAMESPACE, LOC_TYPEDEF,
1225 &objfile->static_psymbols,
1226 0, (CORE_ADDR) 0, cu_language, objfile);
1228 if (cu_language == language_cplus)
1230 /* For C++, these implicitly act as typedefs as well. */
1231 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1232 VAR_NAMESPACE, LOC_TYPEDEF,
1233 &objfile->static_psymbols,
1234 0, (CORE_ADDR) 0, cu_language, objfile);
1237 case DW_TAG_enumerator:
1238 add_psymbol_to_list (pdi->name, strlen (pdi->name),
1239 VAR_NAMESPACE, LOC_CONST,
1240 &objfile->static_psymbols,
1241 0, (CORE_ADDR) 0, cu_language, objfile);
1248 /* Expand this partial symbol table into a full symbol table. */
1251 dwarf2_psymtab_to_symtab (pst)
1252 struct partial_symtab *pst;
1254 /* FIXME: This is barely more than a stub. */
1259 warning ("bug: psymtab for %s is already read in.", pst->filename);
1265 printf_filtered ("Reading in symbols for %s...", pst->filename);
1266 gdb_flush (gdb_stdout);
1269 psymtab_to_symtab_1 (pst);
1271 /* Finish up the debug error message. */
1273 printf_filtered ("done.\n");
1279 psymtab_to_symtab_1 (pst)
1280 struct partial_symtab *pst;
1282 struct objfile *objfile = pst->objfile;
1283 bfd *abfd = objfile->obfd;
1284 struct comp_unit_head cu_header;
1285 struct die_info *dies;
1286 unsigned long offset;
1287 CORE_ADDR lowpc, highpc;
1288 struct die_info *child_die;
1290 struct symtab *symtab;
1291 struct cleanup *back_to;
1293 /* Set local variables from the partial symbol table info. */
1294 offset = DWARF_INFO_OFFSET(pst);
1295 dwarf_info_buffer = DWARF_INFO_BUFFER(pst);
1296 dwarf_abbrev_buffer = DWARF_ABBREV_BUFFER(pst);
1297 dwarf_abbrev_size = DWARF_ABBREV_SIZE(pst);
1298 dwarf_line_buffer = DWARF_LINE_BUFFER(pst);
1299 baseaddr = ANOFFSET (pst->section_offsets, 0);
1300 cu_header_offset = offset;
1301 info_ptr = dwarf_info_buffer + offset;
1303 obstack_init (&dwarf2_tmp_obstack);
1304 back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL);
1307 make_cleanup ((make_cleanup_func) really_free_pendings, NULL);
1309 /* read in the comp_unit header */
1310 cu_header.length = read_4_bytes (abfd, info_ptr);
1312 cu_header.version = read_2_bytes (abfd, info_ptr);
1314 cu_header.abbrev_offset = read_4_bytes (abfd, info_ptr);
1316 cu_header.addr_size = read_1_byte (abfd, info_ptr);
1319 /* Read the abbrevs for this compilation unit */
1320 dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset);
1321 make_cleanup (dwarf2_empty_abbrev_table, NULL);
1323 dies = read_comp_unit (info_ptr, abfd);
1325 make_cleanup ((make_cleanup_func) free_die_list, dies);
1327 /* Do line number decoding in read_file_scope () */
1328 process_die (dies, objfile);
1330 if (!dwarf2_get_pc_bounds (dies, &lowpc, &highpc, objfile))
1332 /* Some compilers don't define a DW_AT_high_pc attribute for
1333 the compilation unit. If the DW_AT_high_pc is missing,
1334 synthesize it, by scanning the DIE's below the compilation unit. */
1336 if (dies->has_children)
1338 child_die = dies->next;
1339 while (child_die && child_die->tag)
1341 if (child_die->tag == DW_TAG_subprogram)
1343 CORE_ADDR low, high;
1345 if (dwarf2_get_pc_bounds (child_die, &low, &high, objfile))
1347 highpc = max (highpc, high);
1350 child_die = sibling_die (child_die);
1354 symtab = end_symtab (highpc + baseaddr, objfile, 0);
1356 /* Set symtab language to language from DW_AT_language.
1357 If the compilation is from a C file generated by language preprocessors,
1358 do not set the language if it was already deduced by start_subfile. */
1360 && !(cu_language == language_c && symtab->language != language_c))
1362 symtab->language = cu_language;
1364 pst->symtab = symtab;
1366 sort_symtab_syms (pst->symtab);
1368 do_cleanups (back_to);
1371 /* Process a die and its children. */
1374 process_die (die, objfile)
1375 struct die_info *die;
1376 struct objfile *objfile;
1380 case DW_TAG_padding:
1382 case DW_TAG_compile_unit:
1383 read_file_scope (die, objfile);
1385 case DW_TAG_subprogram:
1386 read_subroutine_type (die, objfile);
1387 read_func_scope (die, objfile);
1389 case DW_TAG_inlined_subroutine:
1390 /* FIXME: These are ignored for now.
1391 They could be used to set breakpoints on all inlined instances
1392 of a function and make GDB `next' properly over inlined functions. */
1394 case DW_TAG_lexical_block:
1395 read_lexical_block_scope (die, objfile);
1397 case DW_TAG_class_type:
1398 case DW_TAG_structure_type:
1399 case DW_TAG_union_type:
1400 read_structure_scope (die, objfile);
1402 case DW_TAG_enumeration_type:
1403 read_enumeration (die, objfile);
1405 case DW_TAG_subroutine_type:
1406 read_subroutine_type (die, objfile);
1408 case DW_TAG_array_type:
1409 read_array_type (die, objfile);
1411 case DW_TAG_pointer_type:
1412 read_tag_pointer_type (die, objfile);
1414 case DW_TAG_ptr_to_member_type:
1415 read_tag_ptr_to_member_type (die, objfile);
1417 case DW_TAG_reference_type:
1418 read_tag_reference_type (die, objfile);
1420 case DW_TAG_string_type:
1421 read_tag_string_type (die, objfile);
1423 case DW_TAG_base_type:
1424 read_base_type (die, objfile);
1425 if (dwarf_attr (die, DW_AT_name))
1427 /* Add a typedef symbol for the base type definition. */
1428 new_symbol (die, die->type, objfile);
1431 case DW_TAG_common_block:
1432 read_common_block (die, objfile);
1434 case DW_TAG_common_inclusion:
1437 new_symbol (die, NULL, objfile);
1443 read_file_scope (die, objfile)
1444 struct die_info *die;
1445 struct objfile *objfile;
1447 unsigned int line_offset = 0;
1448 CORE_ADDR lowpc = ((CORE_ADDR) -1);
1449 CORE_ADDR highpc = ((CORE_ADDR) 0);
1450 struct attribute *attr;
1451 char *name = "<unknown>";
1452 char *comp_dir = NULL;
1453 struct die_info *child_die;
1454 bfd *abfd = objfile->obfd;
1456 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile))
1458 if (die->has_children)
1460 child_die = die->next;
1461 while (child_die && child_die->tag)
1463 if (child_die->tag == DW_TAG_subprogram)
1465 CORE_ADDR low, high;
1467 if (dwarf2_get_pc_bounds (child_die, &low, &high, objfile))
1469 lowpc = min (lowpc, low);
1470 highpc = max (highpc, high);
1473 child_die = sibling_die (child_die);
1478 /* If we didn't find a lowpc, set it to highpc to avoid complaints
1479 from finish_block. */
1480 if (lowpc == ((CORE_ADDR) -1))
1485 attr = dwarf_attr (die, DW_AT_name);
1488 name = DW_STRING (attr);
1490 attr = dwarf_attr (die, DW_AT_comp_dir);
1493 comp_dir = DW_STRING (attr);
1496 /* Irix 6.2 native cc prepends <machine>.: to the compilation
1497 directory, get rid of it. */
1498 char *cp = strchr (comp_dir, ':');
1500 if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
1505 if (objfile->ei.entry_point >= lowpc &&
1506 objfile->ei.entry_point < highpc)
1508 objfile->ei.entry_file_lowpc = lowpc;
1509 objfile->ei.entry_file_highpc = highpc;
1512 attr = dwarf_attr (die, DW_AT_language);
1515 set_cu_language (DW_UNSND (attr));
1518 /* We assume that we're processing GCC output. */
1519 processing_gcc_compilation = 2;
1521 /* FIXME:Do something here. */
1522 if (dip->at_producer != NULL)
1524 handle_producer (dip->at_producer);
1528 /* The compilation unit may be in a different language or objfile,
1529 zero out all remembered fundamental types. */
1530 memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *));
1532 start_symtab (name, comp_dir, lowpc);
1533 record_debugformat ("DWARF 2");
1535 /* Decode line number information if present. */
1536 attr = dwarf_attr (die, DW_AT_stmt_list);
1539 line_offset = DW_UNSND (attr);
1540 dwarf_decode_lines (line_offset, comp_dir, abfd);
1543 /* Process all dies in compilation unit. */
1544 if (die->has_children)
1546 child_die = die->next;
1547 while (child_die && child_die->tag)
1549 process_die (child_die, objfile);
1550 child_die = sibling_die (child_die);
1556 read_func_scope (die, objfile)
1557 struct die_info *die;
1558 struct objfile *objfile;
1560 register struct context_stack *new;
1563 struct die_info *child_die;
1564 struct attribute *attr;
1567 name = dwarf2_linkage_name (die);
1569 /* Ignore functions with missing or empty names and functions with
1570 missing or invalid low and high pc attributes. */
1571 if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile))
1577 if (objfile->ei.entry_point >= lowpc &&
1578 objfile->ei.entry_point < highpc)
1580 objfile->ei.entry_func_lowpc = lowpc;
1581 objfile->ei.entry_func_highpc = highpc;
1584 if (STREQ (name, "main")) /* FIXME: hardwired name */
1586 objfile->ei.main_func_lowpc = lowpc;
1587 objfile->ei.main_func_highpc = highpc;
1590 /* Decode DW_AT_frame_base location descriptor if present, keep result
1591 for DW_OP_fbreg operands in decode_locdesc. */
1592 frame_base_reg = -1;
1593 frame_base_offset = 0;
1594 attr = dwarf_attr (die, DW_AT_frame_base);
1597 CORE_ADDR addr = decode_locdesc (DW_BLOCK (attr), objfile);
1599 frame_base_reg = addr;
1602 frame_base_reg = basereg;
1603 frame_base_offset = addr;
1606 complain (&dwarf2_unsupported_at_frame_base, name);
1609 new = push_context (0, lowpc);
1610 new->name = new_symbol (die, die->type, objfile);
1611 list_in_scope = &local_symbols;
1613 if (die->has_children)
1615 child_die = die->next;
1616 while (child_die && child_die->tag)
1618 process_die (child_die, objfile);
1619 child_die = sibling_die (child_die);
1623 new = pop_context ();
1624 /* Make a block for the local symbols within. */
1625 finish_block (new->name, &local_symbols, new->old_blocks,
1626 lowpc, highpc, objfile);
1627 list_in_scope = &file_symbols;
1630 /* Process all the DIES contained within a lexical block scope. Start
1631 a new scope, process the dies, and then close the scope. */
1634 read_lexical_block_scope (die, objfile)
1635 struct die_info *die;
1636 struct objfile *objfile;
1638 register struct context_stack *new;
1639 CORE_ADDR lowpc, highpc;
1640 struct die_info *child_die;
1642 /* Ignore blocks with missing or invalid low and high pc attributes. */
1643 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile))
1648 push_context (0, lowpc);
1649 if (die->has_children)
1651 child_die = die->next;
1652 while (child_die && child_die->tag)
1654 process_die (child_die, objfile);
1655 child_die = sibling_die (child_die);
1658 new = pop_context ();
1660 if (local_symbols != NULL)
1662 finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
1665 local_symbols = new->locals;
1668 /* Get low and high pc attributes from a die.
1669 Return 1 if the attributes are present and valid, otherwise, return 0. */
1672 dwarf2_get_pc_bounds (die, lowpc, highpc, objfile)
1673 struct die_info *die;
1676 struct objfile *objfile;
1678 struct attribute *attr;
1682 attr = dwarf_attr (die, DW_AT_low_pc);
1684 low = DW_ADDR (attr);
1687 attr = dwarf_attr (die, DW_AT_high_pc);
1689 high = DW_ADDR (attr);
1696 /* When using the GNU linker, .gnu.linkonce. sections are used to
1697 eliminate duplicate copies of functions and vtables and such.
1698 The linker will arbitrarily choose one and discard the others.
1699 The AT_*_pc values for such functions refer to local labels in
1700 these sections. If the section from that file was discarded, the
1701 labels are not in the output, so the relocs get a value of 0.
1702 If this is a discarded function, mark the pc bounds as invalid,
1703 so that GDB will ignore it. */
1704 if (low == 0 && (bfd_get_file_flags (objfile->obfd) & HAS_RELOC) == 0)
1712 /* Add an aggregate field to the field list. */
1715 dwarf2_add_field (fip, die, objfile)
1716 struct field_info *fip;
1717 struct die_info *die;
1718 struct objfile *objfile;
1720 struct nextfield *new_field;
1721 struct attribute *attr;
1723 char *fieldname = "";
1725 /* Allocate a new field list entry and link it in. */
1726 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
1727 make_cleanup (free, new_field);
1728 memset (new_field, 0, sizeof (struct nextfield));
1729 new_field->next = fip->fields;
1730 fip->fields = new_field;
1733 /* Handle accessibility and virtuality of field.
1734 The default accessibility for members is public, the default
1735 accessibility for inheritance is private. */
1736 if (die->tag != DW_TAG_inheritance)
1737 new_field->accessibility = DW_ACCESS_public;
1739 new_field->accessibility = DW_ACCESS_private;
1740 new_field->virtuality = DW_VIRTUALITY_none;
1742 attr = dwarf_attr (die, DW_AT_accessibility);
1744 new_field->accessibility = DW_UNSND (attr);
1745 if (new_field->accessibility != DW_ACCESS_public)
1746 fip->non_public_fields = 1;
1747 attr = dwarf_attr (die, DW_AT_virtuality);
1749 new_field->virtuality = DW_UNSND (attr);
1751 fp = &new_field->field;
1752 if (die->tag == DW_TAG_member)
1754 /* Get type of field. */
1755 fp->type = die_type (die, objfile);
1757 /* Get bit size of field (zero if none). */
1758 attr = dwarf_attr (die, DW_AT_bit_size);
1761 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
1765 FIELD_BITSIZE (*fp) = 0;
1768 /* Get bit offset of field. */
1769 attr = dwarf_attr (die, DW_AT_data_member_location);
1772 FIELD_BITPOS (*fp) =
1773 decode_locdesc (DW_BLOCK (attr), objfile) * bits_per_byte;
1776 FIELD_BITPOS (*fp) = 0;
1777 attr = dwarf_attr (die, DW_AT_bit_offset);
1780 if (BITS_BIG_ENDIAN)
1782 /* For big endian bits, the DW_AT_bit_offset gives the
1783 additional bit offset from the MSB of the containing
1784 anonymous object to the MSB of the field. We don't
1785 have to do anything special since we don't need to
1786 know the size of the anonymous object. */
1787 FIELD_BITPOS (*fp) += DW_UNSND (attr);
1791 /* For little endian bits, compute the bit offset to the
1792 MSB of the anonymous object, subtract off the number of
1793 bits from the MSB of the field to the MSB of the
1794 object, and then subtract off the number of bits of
1795 the field itself. The result is the bit offset of
1796 the LSB of the field. */
1798 int bit_offset = DW_UNSND (attr);
1800 attr = dwarf_attr (die, DW_AT_byte_size);
1803 /* The size of the anonymous object containing
1804 the bit field is explicit, so use the
1805 indicated size (in bytes). */
1806 anonymous_size = DW_UNSND (attr);
1810 /* The size of the anonymous object containing
1811 the bit field must be inferred from the type
1812 attribute of the data member containing the
1814 anonymous_size = TYPE_LENGTH (fp->type);
1816 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
1817 - bit_offset - FIELD_BITSIZE (*fp);
1821 /* Get name of field. */
1822 attr = dwarf_attr (die, DW_AT_name);
1823 if (attr && DW_STRING (attr))
1824 fieldname = DW_STRING (attr);
1825 fp->name = obsavestring (fieldname, strlen (fieldname),
1826 &objfile->type_obstack);
1828 /* Change accessibility for artificial fields (e.g. virtual table
1829 pointer or virtual base class pointer) to private. */
1830 if (dwarf_attr (die, DW_AT_artificial))
1832 new_field->accessibility = DW_ACCESS_private;
1833 fip->non_public_fields = 1;
1836 else if (die->tag == DW_TAG_variable)
1841 /* C++ static member.
1842 Get physical name, extract field name from physical name. */
1843 physname = dwarf2_linkage_name (die);
1844 if (physname == NULL)
1848 while (*cp && !is_cplus_marker (*cp))
1852 if (*fieldname == '\0')
1854 complain (&dwarf2_bad_static_member_name, physname);
1857 SET_FIELD_PHYSNAME (*fp, obsavestring (physname, strlen (physname),
1858 &objfile->type_obstack));
1859 FIELD_TYPE (*fp) = die_type (die, objfile);
1860 FIELD_NAME (*fp) = obsavestring (fieldname, strlen (fieldname),
1861 &objfile->type_obstack);
1863 else if (die->tag == DW_TAG_inheritance)
1865 /* C++ base class field. */
1866 attr = dwarf_attr (die, DW_AT_data_member_location);
1868 FIELD_BITPOS (*fp) = decode_locdesc (DW_BLOCK (attr), objfile) * bits_per_byte;
1869 FIELD_BITSIZE (*fp) = 0;
1870 FIELD_TYPE (*fp) = die_type (die, objfile);
1871 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
1872 fip->nbaseclasses++;
1876 /* Create the vector of fields, and attach it to the type. */
1879 dwarf2_attach_fields_to_type (fip, type, objfile)
1880 struct field_info *fip;
1882 struct objfile *objfile;
1884 int nfields = fip->nfields;
1886 /* Record the field count, allocate space for the array of fields,
1887 and create blank accessibility bitfields if necessary. */
1888 TYPE_NFIELDS (type) = nfields;
1889 TYPE_FIELDS (type) = (struct field *)
1890 TYPE_ALLOC (type, sizeof (struct field) * nfields);
1891 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
1893 if (fip->non_public_fields)
1895 ALLOCATE_CPLUS_STRUCT_TYPE (type);
1897 TYPE_FIELD_PRIVATE_BITS (type) =
1898 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
1899 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
1901 TYPE_FIELD_PROTECTED_BITS (type) =
1902 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
1903 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
1905 TYPE_FIELD_IGNORE_BITS (type) =
1906 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
1907 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
1910 /* If the type has baseclasses, allocate and clear a bit vector for
1911 TYPE_FIELD_VIRTUAL_BITS. */
1912 if (fip->nbaseclasses)
1914 int num_bytes = B_BYTES (fip->nbaseclasses);
1917 ALLOCATE_CPLUS_STRUCT_TYPE (type);
1918 pointer = (char *) TYPE_ALLOC (type, num_bytes);
1919 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
1920 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
1921 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
1924 /* Copy the saved-up fields into the field vector. Start from the head
1925 of the list, adding to the tail of the field array, so that they end
1926 up in the same order in the array in which they were added to the list. */
1927 while (nfields-- > 0)
1929 TYPE_FIELD (type, nfields) = fip->fields->field;
1930 switch (fip->fields->accessibility)
1932 case DW_ACCESS_private:
1933 SET_TYPE_FIELD_PRIVATE (type, nfields);
1936 case DW_ACCESS_protected:
1937 SET_TYPE_FIELD_PROTECTED (type, nfields);
1940 case DW_ACCESS_public:
1944 /* Unknown accessibility. Complain and treat it as public. */
1946 complain (&dwarf2_unsupported_accessibility,
1947 fip->fields->accessibility);
1951 if (nfields < fip->nbaseclasses)
1953 switch (fip->fields->virtuality)
1955 case DW_VIRTUALITY_virtual:
1956 case DW_VIRTUALITY_pure_virtual:
1957 SET_TYPE_FIELD_VIRTUAL (type, nfields);
1961 fip->fields = fip->fields->next;
1965 /* Skip to the end of a member function name in a mangled name. */
1968 skip_member_fn_name (physname)
1971 char *endname = physname;
1973 /* Skip over leading underscores. */
1974 while (*endname == '_')
1977 /* Find two succesive underscores. */
1979 endname = strchr (endname, '_');
1980 while (endname != NULL && *++endname != '_');
1982 if (endname == NULL)
1984 complain (&dwarf2_bad_member_name_complaint, physname);
1989 /* Take care of trailing underscores. */
1990 if (endname[1] != '_')
1996 /* Add a member function to the proper fieldlist. */
1999 dwarf2_add_member_fn (fip, die, type, objfile)
2000 struct field_info *fip;
2001 struct die_info *die;
2003 struct objfile *objfile;
2005 struct attribute *attr;
2006 struct fnfieldlist *flp;
2008 struct fn_field *fnp;
2011 struct nextfnfield *new_fnfield;
2013 /* Extract member function name from mangled name. */
2014 physname = dwarf2_linkage_name (die);
2015 if (physname == NULL)
2017 if ((physname[0] == '_' && physname[1] == '_'
2018 && strchr ("0123456789Qt", physname[2]))
2019 || DESTRUCTOR_PREFIX_P (physname))
2021 /* Constructor and destructor field names are set to the name
2022 of the class, but without template parameter lists.
2023 The name might be missing for anonymous aggregates. */
2024 if (TYPE_TAG_NAME (type))
2026 char *p = strchr (TYPE_TAG_NAME (type), '<');
2029 fieldname = TYPE_TAG_NAME (type);
2031 fieldname = obsavestring (TYPE_TAG_NAME (type),
2032 p - TYPE_TAG_NAME (type),
2033 &objfile->type_obstack);
2037 char *anon_name = "";
2038 fieldname = obsavestring (anon_name, strlen (anon_name),
2039 &objfile->type_obstack);
2044 char *endname = skip_member_fn_name (physname);
2046 /* Ignore member function if we were unable not extract the member
2048 if (endname == physname)
2050 fieldname = obsavestring (physname, endname - physname,
2051 &objfile->type_obstack);
2054 /* Look up member function name in fieldlist. */
2055 for (i = 0; i < fip->nfnfields; i++)
2057 if (STREQ (fip->fnfieldlists[i].name, fieldname))
2061 /* Create new list element if necessary. */
2062 if (i < fip->nfnfields)
2063 flp = &fip->fnfieldlists[i];
2066 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
2068 fip->fnfieldlists = (struct fnfieldlist *)
2069 xrealloc (fip->fnfieldlists,
2070 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
2071 * sizeof (struct fnfieldlist));
2072 if (fip->nfnfields == 0)
2073 make_cleanup ((make_cleanup_func) free_current_contents,
2074 &fip->fnfieldlists);
2076 flp = &fip->fnfieldlists[fip->nfnfields];
2077 flp->name = fieldname;
2083 /* Create a new member function field and chain it to the field list
2085 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
2086 make_cleanup (free, new_fnfield);
2087 memset (new_fnfield, 0, sizeof (struct nextfnfield));
2088 new_fnfield->next = flp->head;
2089 flp->head = new_fnfield;
2092 /* Fill in the member function field info. */
2093 fnp = &new_fnfield->fnfield;
2094 fnp->physname = obsavestring (physname, strlen (physname),
2095 &objfile->type_obstack);
2096 fnp->type = alloc_type (objfile);
2097 if (die->type && TYPE_CODE (die->type) == TYPE_CODE_FUNC)
2099 struct type *return_type = TYPE_TARGET_TYPE (die->type);
2100 struct type **arg_types;
2101 int nparams = TYPE_NFIELDS (die->type);
2104 /* Copy argument types from the subroutine type. */
2105 arg_types = (struct type **)
2106 TYPE_ALLOC (fnp->type, (nparams + 1) * sizeof (struct type *));
2107 for (iparams = 0; iparams < nparams; iparams++)
2108 arg_types[iparams] = TYPE_FIELD_TYPE (die->type, iparams);
2110 /* Set last entry in argument type vector. */
2111 if (TYPE_FLAGS (die->type) & TYPE_FLAG_VARARGS)
2112 arg_types[nparams] = NULL;
2114 arg_types[nparams] = dwarf2_fundamental_type (objfile, FT_VOID);
2116 smash_to_method_type (fnp->type, type, return_type, arg_types);
2118 /* Handle static member functions.
2119 Dwarf2 has no clean way to discern C++ static and non-static
2120 member functions. G++ helps GDB by marking the first
2121 parameter for non-static member functions (which is the
2122 this pointer) as artificial. We obtain this information
2123 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
2124 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (die->type, 0) == 0)
2125 fnp->voffset = VOFFSET_STATIC;
2128 complain (&dwarf2_missing_member_fn_type_complaint, physname);
2130 /* Get fcontext from DW_AT_containing_type if present. */
2131 if (dwarf_attr (die, DW_AT_containing_type) != NULL)
2132 fnp->fcontext = die_containing_type (die, objfile);
2134 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
2135 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
2137 /* Get accessibility. */
2138 attr = dwarf_attr (die, DW_AT_accessibility);
2141 switch (DW_UNSND (attr))
2143 case DW_ACCESS_private:
2144 fnp->is_private = 1;
2146 case DW_ACCESS_protected:
2147 fnp->is_protected = 1;
2152 /* Get index in virtual function table if it is a virtual member function. */
2153 attr = dwarf_attr (die, DW_AT_vtable_elem_location);
2155 fnp->voffset = decode_locdesc (DW_BLOCK (attr), objfile) + 2;
2158 /* Create the vector of member function fields, and attach it to the type. */
2161 dwarf2_attach_fn_fields_to_type (fip, type, objfile)
2162 struct field_info *fip;
2164 struct objfile *objfile;
2166 struct fnfieldlist *flp;
2167 int total_length = 0;
2170 ALLOCATE_CPLUS_STRUCT_TYPE (type);
2171 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
2172 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
2174 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
2176 struct nextfnfield *nfp = flp->head;
2177 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
2180 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
2181 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
2182 fn_flp->fn_fields = (struct fn_field *)
2183 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
2184 for (k = flp->length; (k--, nfp); nfp = nfp->next)
2185 fn_flp->fn_fields[k] = nfp->fnfield;
2187 total_length += flp->length;
2190 TYPE_NFN_FIELDS (type) = fip->nfnfields;
2191 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
2194 /* Called when we find the DIE that starts a structure or union scope
2195 (definition) to process all dies that define the members of the
2198 NOTE: we need to call struct_type regardless of whether or not the
2199 DIE has an at_name attribute, since it might be an anonymous
2200 structure or union. This gets the type entered into our set of
2203 However, if the structure is incomplete (an opaque struct/union)
2204 then suppress creating a symbol table entry for it since gdb only
2205 wants to find the one with the complete definition. Note that if
2206 it is complete, we just call new_symbol, which does it's own
2207 checking about whether the struct/union is anonymous or not (and
2208 suppresses creating a symbol table entry itself). */
2211 read_structure_scope (die, objfile)
2212 struct die_info *die;
2213 struct objfile *objfile;
2216 struct attribute *attr;
2218 type = alloc_type (objfile);
2220 INIT_CPLUS_SPECIFIC (type);
2221 attr = dwarf_attr (die, DW_AT_name);
2222 if (attr && DW_STRING (attr))
2224 TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr),
2225 strlen (DW_STRING (attr)),
2226 &objfile->type_obstack);
2229 if (die->tag == DW_TAG_structure_type)
2231 TYPE_CODE (type) = TYPE_CODE_STRUCT;
2233 else if (die->tag == DW_TAG_union_type)
2235 TYPE_CODE (type) = TYPE_CODE_UNION;
2239 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
2241 TYPE_CODE (type) = TYPE_CODE_CLASS;
2244 attr = dwarf_attr (die, DW_AT_byte_size);
2247 TYPE_LENGTH (type) = DW_UNSND (attr);
2251 TYPE_LENGTH (type) = 0;
2254 /* We need to add the type field to the die immediately so we don't
2255 infinitely recurse when dealing with pointers to the structure
2256 type within the structure itself. */
2259 if (die->has_children)
2261 struct field_info fi;
2262 struct die_info *child_die;
2263 struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
2265 memset (&fi, 0, sizeof (struct field_info));
2267 child_die = die->next;
2269 while (child_die && child_die->tag)
2271 if (child_die->tag == DW_TAG_member)
2273 dwarf2_add_field (&fi, child_die, objfile);
2275 else if (child_die->tag == DW_TAG_variable)
2277 /* C++ static member. */
2278 dwarf2_add_field (&fi, child_die, objfile);
2280 else if (child_die->tag == DW_TAG_subprogram)
2282 /* C++ member function. */
2283 process_die (child_die, objfile);
2284 dwarf2_add_member_fn (&fi, child_die, type, objfile);
2286 else if (child_die->tag == DW_TAG_inheritance)
2288 /* C++ base class field. */
2289 dwarf2_add_field (&fi, child_die, objfile);
2293 process_die (child_die, objfile);
2295 child_die = sibling_die (child_die);
2298 /* Attach fields and member functions to the type. */
2300 dwarf2_attach_fields_to_type (&fi, type, objfile);
2303 dwarf2_attach_fn_fields_to_type (&fi, type, objfile);
2305 /* Get the type which refers to the base class (possibly this
2306 class itself) which contains the vtable pointer for the current
2307 class from the DW_AT_containing_type attribute. */
2309 if (dwarf_attr (die, DW_AT_containing_type) != NULL)
2311 struct type *t = die_containing_type (die, objfile);
2313 TYPE_VPTR_BASETYPE (type) = t;
2316 static const char vptr_name[] = { '_','v','p','t','r','\0' };
2319 /* Our own class provides vtbl ptr. */
2320 for (i = TYPE_NFIELDS (t) - 1;
2321 i >= TYPE_N_BASECLASSES (t);
2324 char *fieldname = TYPE_FIELD_NAME (t, i);
2326 if (STREQN (fieldname, vptr_name, strlen (vptr_name) - 1)
2327 && is_cplus_marker (fieldname[strlen (vptr_name)]))
2329 TYPE_VPTR_FIELDNO (type) = i;
2334 /* Complain if virtual function table field not found. */
2335 if (i < TYPE_N_BASECLASSES (t))
2336 complain (&dwarf2_vtbl_not_found_complaint,
2337 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : "");
2341 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
2346 new_symbol (die, type, objfile);
2348 do_cleanups (back_to);
2352 /* No children, must be stub. */
2353 TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
2359 /* Given a pointer to a die which begins an enumeration, process all
2360 the dies that define the members of the enumeration.
2362 This will be much nicer in draft 6 of the DWARF spec when our
2363 members will be dies instead squished into the DW_AT_element_list
2366 NOTE: We reverse the order of the element list. */
2369 read_enumeration (die, objfile)
2370 struct die_info *die;
2371 struct objfile *objfile;
2373 struct die_info *child_die;
2375 struct field *fields;
2376 struct attribute *attr;
2379 int unsigned_enum = 1;
2381 type = alloc_type (objfile);
2383 TYPE_CODE (type) = TYPE_CODE_ENUM;
2384 attr = dwarf_attr (die, DW_AT_name);
2385 if (attr && DW_STRING (attr))
2387 TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr),
2388 strlen (DW_STRING (attr)),
2389 &objfile->type_obstack);
2392 attr = dwarf_attr (die, DW_AT_byte_size);
2395 TYPE_LENGTH (type) = DW_UNSND (attr);
2399 TYPE_LENGTH (type) = 0;
2404 if (die->has_children)
2406 child_die = die->next;
2407 while (child_die && child_die->tag)
2409 if (child_die->tag != DW_TAG_enumerator)
2411 process_die (child_die, objfile);
2415 attr = dwarf_attr (child_die, DW_AT_name);
2418 sym = new_symbol (child_die, type, objfile);
2419 if (SYMBOL_VALUE (sym) < 0)
2422 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
2424 fields = (struct field *)
2426 (num_fields + DW_FIELD_ALLOC_CHUNK)
2427 * sizeof (struct field));
2430 FIELD_NAME (fields[num_fields]) = SYMBOL_NAME (sym);
2431 FIELD_TYPE (fields[num_fields]) = NULL;
2432 FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym);
2433 FIELD_BITSIZE (fields[num_fields]) = 0;
2439 child_die = sibling_die (child_die);
2444 TYPE_NFIELDS (type) = num_fields;
2445 TYPE_FIELDS (type) = (struct field *)
2446 TYPE_ALLOC (type, sizeof (struct field) * num_fields);
2447 memcpy (TYPE_FIELDS (type), fields,
2448 sizeof (struct field) * num_fields);
2452 TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED;
2455 new_symbol (die, type, objfile);
2458 /* Extract all information from a DW_TAG_array_type DIE and put it in
2459 the DIE's type field. For now, this only handles one dimensional
2463 read_array_type (die, objfile)
2464 struct die_info *die;
2465 struct objfile *objfile;
2467 struct die_info *child_die;
2468 struct type *type = NULL;
2469 struct type *element_type, *range_type, *index_type;
2470 struct type **range_types = NULL;
2471 struct attribute *attr;
2473 struct cleanup *back_to;
2475 /* Return if we've already decoded this type. */
2481 element_type = die_type (die, objfile);
2483 /* Irix 6.2 native cc creates array types without children for
2484 arrays with unspecified length. */
2485 if (die->has_children == 0)
2487 index_type = dwarf2_fundamental_type (objfile, FT_INTEGER);
2488 range_type = create_range_type (NULL, index_type, 0, -1);
2489 die->type = create_array_type (NULL, element_type, range_type);
2493 back_to = make_cleanup (null_cleanup, NULL);
2494 child_die = die->next;
2495 while (child_die && child_die->tag)
2497 if (child_die->tag == DW_TAG_subrange_type)
2499 unsigned int low, high;
2501 /* Default bounds to an array with unspecified length. */
2504 if (cu_language == language_fortran)
2506 /* FORTRAN implies a lower bound of 1, if not given. */
2510 index_type = die_type (child_die, objfile);
2511 attr = dwarf_attr (child_die, DW_AT_lower_bound);
2514 if (attr->form == DW_FORM_sdata)
2516 low = DW_SND (attr);
2518 else if (attr->form == DW_FORM_udata
2519 || attr->form == DW_FORM_data1
2520 || attr->form == DW_FORM_data2
2521 || attr->form == DW_FORM_data4)
2523 low = DW_UNSND (attr);
2527 complain (&dwarf2_non_const_array_bound_ignored,
2528 dwarf_form_name (attr->form));
2530 die->type = lookup_pointer_type (element_type);
2537 attr = dwarf_attr (child_die, DW_AT_upper_bound);
2540 if (attr->form == DW_FORM_sdata)
2542 high = DW_SND (attr);
2544 else if (attr->form == DW_FORM_udata
2545 || attr->form == DW_FORM_data1
2546 || attr->form == DW_FORM_data2
2547 || attr->form == DW_FORM_data4)
2549 high = DW_UNSND (attr);
2551 else if (attr->form == DW_FORM_block1)
2553 /* GCC encodes arrays with unspecified or dynamic length
2554 with a DW_FORM_block1 attribute.
2555 FIXME: GDB does not yet know how to handle dynamic
2556 arrays properly, treat them as arrays with unspecified
2562 complain (&dwarf2_non_const_array_bound_ignored,
2563 dwarf_form_name (attr->form));
2565 die->type = lookup_pointer_type (element_type);
2573 /* Create a range type and save it for array type creation. */
2574 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
2576 range_types = (struct type **)
2577 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
2578 * sizeof (struct type *));
2580 make_cleanup ((make_cleanup_func) free_current_contents,
2583 range_types[ndim++] = create_range_type (NULL, index_type, low, high);
2585 child_die = sibling_die (child_die);
2588 /* Dwarf2 dimensions are output from left to right, create the
2589 necessary array types in backwards order. */
2590 type = element_type;
2592 type = create_array_type (NULL, type, range_types[ndim]);
2594 do_cleanups (back_to);
2596 /* Install the type in the die. */
2600 /* First cut: install each common block member as a global variable. */
2603 read_common_block (die, objfile)
2604 struct die_info *die;
2605 struct objfile *objfile;
2607 struct die_info *child_die;
2608 struct attribute *attr;
2610 CORE_ADDR base = (CORE_ADDR) 0;
2612 attr = dwarf_attr (die, DW_AT_location);
2615 base = decode_locdesc (DW_BLOCK (attr), objfile);
2617 if (die->has_children)
2619 child_die = die->next;
2620 while (child_die && child_die->tag)
2622 sym = new_symbol (child_die, NULL, objfile);
2623 attr = dwarf_attr (child_die, DW_AT_data_member_location);
2626 SYMBOL_VALUE_ADDRESS (sym) =
2627 base + decode_locdesc (DW_BLOCK (attr), objfile);
2628 add_symbol_to_list (sym, &global_symbols);
2630 child_die = sibling_die (child_die);
2635 /* Extract all information from a DW_TAG_pointer_type DIE and add to
2636 the user defined type vector. */
2639 read_tag_pointer_type (die, objfile)
2640 struct die_info *die;
2641 struct objfile *objfile;
2644 struct attribute *attr;
2651 type = lookup_pointer_type (die_type (die, objfile));
2652 attr = dwarf_attr (die, DW_AT_byte_size);
2655 TYPE_LENGTH (type) = DW_UNSND (attr);
2659 TYPE_LENGTH (type) = address_size;
2664 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
2665 the user defined type vector. */
2668 read_tag_ptr_to_member_type (die, objfile)
2669 struct die_info *die;
2670 struct objfile *objfile;
2673 struct type *to_type;
2674 struct type *domain;
2681 type = alloc_type (objfile);
2682 to_type = die_type (die, objfile);
2683 domain = die_containing_type (die, objfile);
2684 smash_to_member_type (type, domain, to_type);
2689 /* Extract all information from a DW_TAG_reference_type DIE and add to
2690 the user defined type vector. */
2693 read_tag_reference_type (die, objfile)
2694 struct die_info *die;
2695 struct objfile *objfile;
2698 struct attribute *attr;
2705 type = lookup_reference_type (die_type (die, objfile));
2706 attr = dwarf_attr (die, DW_AT_byte_size);
2709 TYPE_LENGTH (type) = DW_UNSND (attr);
2713 TYPE_LENGTH (type) = address_size;
2719 read_tag_const_type (die, objfile)
2720 struct die_info *die;
2721 struct objfile *objfile;
2728 complain (&dwarf2_const_ignored);
2729 die->type = die_type (die, objfile);
2733 read_tag_volatile_type (die, objfile)
2734 struct die_info *die;
2735 struct objfile *objfile;
2742 complain (&dwarf2_volatile_ignored);
2743 die->type = die_type (die, objfile);
2746 /* Extract all information from a DW_TAG_string_type DIE and add to
2747 the user defined type vector. It isn't really a user defined type,
2748 but it behaves like one, with other DIE's using an AT_user_def_type
2749 attribute to reference it. */
2752 read_tag_string_type (die, objfile)
2753 struct die_info *die;
2754 struct objfile *objfile;
2756 struct type *type, *range_type, *index_type, *char_type;
2757 struct attribute *attr;
2758 unsigned int length;
2765 attr = dwarf_attr (die, DW_AT_string_length);
2768 length = DW_UNSND (attr);
2774 index_type = dwarf2_fundamental_type (objfile, FT_INTEGER);
2775 range_type = create_range_type (NULL, index_type, 1, length);
2776 char_type = dwarf2_fundamental_type (objfile, FT_CHAR);
2777 type = create_string_type (char_type, range_type);
2781 /* Handle DIES due to C code like:
2785 int (*funcp)(int a, long l);
2789 ('funcp' generates a DW_TAG_subroutine_type DIE)
2793 read_subroutine_type (die, objfile)
2794 struct die_info *die;
2795 struct objfile *objfile;
2797 struct type *type; /* Type that this function returns */
2798 struct type *ftype; /* Function that returns above type */
2799 struct attribute *attr;
2801 /* Decode the type that this subroutine returns */
2806 type = die_type (die, objfile);
2807 ftype = lookup_function_type (type);
2809 /* All functions in C++ have prototypes. */
2810 attr = dwarf_attr (die, DW_AT_prototyped);
2811 if ((attr && (DW_UNSND (attr) != 0))
2812 || cu_language == language_cplus)
2813 TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED;
2815 if (die->has_children)
2817 struct die_info *child_die;
2821 /* Count the number of parameters.
2822 FIXME: GDB currently ignores vararg functions, but knows about
2823 vararg member functions. */
2824 child_die = die->next;
2825 while (child_die && child_die->tag)
2827 if (child_die->tag == DW_TAG_formal_parameter)
2829 else if (child_die->tag == DW_TAG_unspecified_parameters)
2830 TYPE_FLAGS (ftype) |= TYPE_FLAG_VARARGS;
2831 child_die = sibling_die (child_die);
2834 /* Allocate storage for parameters and fill them in. */
2835 TYPE_NFIELDS (ftype) = nparams;
2836 TYPE_FIELDS (ftype) = (struct field *)
2837 TYPE_ALLOC (ftype, nparams * sizeof (struct field));
2839 child_die = die->next;
2840 while (child_die && child_die->tag)
2842 if (child_die->tag == DW_TAG_formal_parameter)
2844 /* Dwarf2 has no clean way to discern C++ static and non-static
2845 member functions. G++ helps GDB by marking the first
2846 parameter for non-static member functions (which is the
2847 this pointer) as artificial. We pass this information
2848 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
2849 attr = dwarf_attr (child_die, DW_AT_artificial);
2851 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
2853 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
2854 TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, objfile);
2857 child_die = sibling_die (child_die);
2865 read_typedef (die, objfile)
2866 struct die_info *die;
2867 struct objfile *objfile;
2873 struct attribute *attr;
2876 xtype = die_type (die, objfile);
2878 type = alloc_type (objfile);
2879 TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
2880 TYPE_FLAGS (type) |= TYPE_FLAG_TARGET_STUB;
2881 TYPE_TARGET_TYPE (type) = xtype;
2882 attr = dwarf_attr (die, DW_AT_name);
2883 if (attr && DW_STRING (attr))
2884 TYPE_NAME (type) = obsavestring (DW_STRING (attr),
2885 strlen (DW_STRING (attr)),
2886 &objfile->type_obstack);
2892 /* Find a representation of a given base type and install
2893 it in the TYPE field of the die. */
2896 read_base_type (die, objfile)
2897 struct die_info *die;
2898 struct objfile *objfile;
2901 struct attribute *attr;
2902 int encoding = 0, size = 0;
2904 /* If we've already decoded this die, this is a no-op. */
2910 attr = dwarf_attr (die, DW_AT_encoding);
2913 encoding = DW_UNSND (attr);
2915 attr = dwarf_attr (die, DW_AT_byte_size);
2918 size = DW_UNSND (attr);
2920 attr = dwarf_attr (die, DW_AT_name);
2921 if (attr && DW_STRING (attr))
2923 enum type_code code = TYPE_CODE_INT;
2924 int is_unsigned = 0;
2928 case DW_ATE_address:
2929 /* Turn DW_ATE_address into a void * pointer. */
2930 code = TYPE_CODE_PTR;
2933 case DW_ATE_boolean:
2934 code = TYPE_CODE_BOOL;
2937 case DW_ATE_complex_float:
2938 code = TYPE_CODE_COMPLEX;
2941 code = TYPE_CODE_FLT;
2944 case DW_ATE_signed_char:
2946 case DW_ATE_unsigned:
2947 case DW_ATE_unsigned_char:
2951 complain (&dwarf2_unsupported_at_encoding,
2952 dwarf_type_encoding_name (encoding));
2955 type = init_type (code, size, is_unsigned, DW_STRING (attr), objfile);
2956 if (encoding == DW_ATE_address)
2957 TYPE_TARGET_TYPE (type) = dwarf2_fundamental_type (objfile, FT_VOID);
2961 type = dwarf_base_type (encoding, size, objfile);
2966 /* Read a whole compilation unit into a linked list of dies. */
2969 read_comp_unit (info_ptr, abfd)
2973 struct die_info *first_die, *last_die, *die;
2977 /* Reset die reference table, we are building a new one now. */
2978 dwarf2_empty_die_ref_table ();
2982 first_die = last_die = NULL;
2985 cur_ptr = read_full_die (&die, abfd, cur_ptr);
2986 if (die->has_children)
2997 /* Enter die in reference hash table */
2998 store_in_ref_table (die->offset, die);
3002 first_die = last_die = die;
3006 last_die->next = die;
3010 while (nesting_level > 0);
3014 /* Free a linked list of dies. */
3017 free_die_list (dies)
3018 struct die_info *dies;
3020 struct die_info *die, *next;
3032 /* Read the contents of the section at OFFSET and of size SIZE from the
3033 object file specified by OBJFILE into the psymbol_obstack and return it. */
3036 dwarf2_read_section (objfile, offset, size)
3037 struct objfile *objfile;
3041 bfd *abfd = objfile->obfd;
3047 buf = (char *) obstack_alloc (&objfile->psymbol_obstack, size);
3048 if ((bfd_seek (abfd, offset, SEEK_SET) != 0) ||
3049 (bfd_read (buf, size, 1, abfd) != size))
3052 error ("Dwarf Error: Can't read DWARF data from '%s'",
3053 bfd_get_filename (abfd));
3058 /* In DWARF version 2, the description of the debugging information is
3059 stored in a separate .debug_abbrev section. Before we read any
3060 dies from a section we read in all abbreviations and install them
3064 dwarf2_read_abbrevs (abfd, offset)
3066 unsigned int offset;
3069 struct abbrev_info *cur_abbrev;
3070 unsigned int abbrev_number, bytes_read, abbrev_name;
3071 unsigned int abbrev_form, hash_number;
3073 /* empty the table */
3074 dwarf2_empty_abbrev_table (NULL);
3076 abbrev_ptr = dwarf_abbrev_buffer + offset;
3077 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3078 abbrev_ptr += bytes_read;
3080 /* loop until we reach an abbrev number of 0 */
3081 while (abbrev_number)
3083 cur_abbrev = dwarf_alloc_abbrev ();
3085 /* read in abbrev header */
3086 cur_abbrev->number = abbrev_number;
3087 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3088 abbrev_ptr += bytes_read;
3089 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
3092 /* now read in declarations */
3093 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3094 abbrev_ptr += bytes_read;
3095 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3096 abbrev_ptr += bytes_read;
3099 if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0)
3101 cur_abbrev->attrs = (struct attr_abbrev *)
3102 xrealloc (cur_abbrev->attrs,
3103 (cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK)
3104 * sizeof (struct attr_abbrev));
3106 cur_abbrev->attrs[cur_abbrev->num_attrs].name = abbrev_name;
3107 cur_abbrev->attrs[cur_abbrev->num_attrs++].form = abbrev_form;
3108 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3109 abbrev_ptr += bytes_read;
3110 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3111 abbrev_ptr += bytes_read;
3114 hash_number = abbrev_number % ABBREV_HASH_SIZE;
3115 cur_abbrev->next = dwarf2_abbrevs[hash_number];
3116 dwarf2_abbrevs[hash_number] = cur_abbrev;
3118 /* Get next abbreviation.
3119 Under Irix6 the abbreviations for a compilation unit are not
3120 always properly terminated with an abbrev number of 0.
3121 Exit loop if we encounter an abbreviation which we have
3122 already read (which means we are about to read the abbreviations
3123 for the next compile unit) or if the end of the abbreviation
3124 table is reached. */
3125 if ((unsigned int) (abbrev_ptr - dwarf_abbrev_buffer)
3126 >= dwarf_abbrev_size)
3128 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
3129 abbrev_ptr += bytes_read;
3130 if (dwarf2_lookup_abbrev (abbrev_number) != NULL)
3135 /* Empty the abbrev table for a new compilation unit. */
3139 dwarf2_empty_abbrev_table (ignore)
3143 struct abbrev_info *abbrev, *next;
3145 for (i = 0; i < ABBREV_HASH_SIZE; ++i)
3148 abbrev = dwarf2_abbrevs[i];
3151 next = abbrev->next;
3152 free (abbrev->attrs);
3156 dwarf2_abbrevs[i] = NULL;
3160 /* Lookup an abbrev_info structure in the abbrev hash table. */
3162 static struct abbrev_info *
3163 dwarf2_lookup_abbrev (number)
3164 unsigned int number;
3166 unsigned int hash_number;
3167 struct abbrev_info *abbrev;
3169 hash_number = number % ABBREV_HASH_SIZE;
3170 abbrev = dwarf2_abbrevs[hash_number];
3174 if (abbrev->number == number)
3177 abbrev = abbrev->next;
3182 /* Read a minimal amount of information into the minimal die structure. */
3185 read_partial_die (part_die, abfd, info_ptr, has_pc_info)
3186 struct partial_die_info *part_die;
3191 unsigned int abbrev_number, bytes_read, i;
3192 struct abbrev_info *abbrev;
3193 struct attribute attr;
3194 struct attribute spec_attr;
3195 int found_spec_attr = 0;
3196 int has_low_pc_attr = 0;
3197 int has_high_pc_attr = 0;
3199 *part_die = zeroed_partial_die;
3201 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3202 info_ptr += bytes_read;
3206 abbrev = dwarf2_lookup_abbrev (abbrev_number);
3209 error ("Dwarf Error: Could not find abbrev number %d.", abbrev_number);
3211 part_die->offset = info_ptr - dwarf_info_buffer;
3212 part_die->tag = abbrev->tag;
3213 part_die->has_children = abbrev->has_children;
3214 part_die->abbrev = abbrev_number;
3216 for (i = 0; i < abbrev->num_attrs; ++i)
3218 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr);
3220 /* Store the data if it is of an attribute we want to keep in a
3221 partial symbol table. */
3226 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
3227 if (part_die->name == NULL)
3228 part_die->name = DW_STRING (&attr);
3230 case DW_AT_MIPS_linkage_name:
3231 part_die->name = DW_STRING (&attr);
3234 has_low_pc_attr = 1;
3235 part_die->lowpc = DW_ADDR (&attr);
3238 has_high_pc_attr = 1;
3239 part_die->highpc = DW_ADDR (&attr);
3241 case DW_AT_location:
3242 part_die->locdesc = DW_BLOCK (&attr);
3244 case DW_AT_language:
3245 part_die->language = DW_UNSND (&attr);
3247 case DW_AT_external:
3248 part_die->is_external = DW_UNSND (&attr);
3250 case DW_AT_declaration:
3251 part_die->is_declaration = DW_UNSND (&attr);
3254 part_die->has_type = 1;
3256 case DW_AT_abstract_origin:
3257 case DW_AT_specification:
3258 found_spec_attr = 1;
3262 /* Ignore absolute siblings, they might point outside of
3263 the current compile unit. */
3264 if (attr.form == DW_FORM_ref_addr)
3265 complain(&dwarf2_absolute_sibling_complaint);
3268 dwarf_info_buffer + dwarf2_get_ref_die_offset (&attr);
3275 /* If we found a reference attribute and the die has no name, try
3276 to find a name in the referred to die. */
3278 if (found_spec_attr && part_die->name == NULL)
3280 struct partial_die_info spec_die;
3284 spec_ptr = dwarf_info_buffer + dwarf2_get_ref_die_offset (&spec_attr);
3285 read_partial_die (&spec_die, abfd, spec_ptr, &dummy);
3288 part_die->name = spec_die.name;
3290 /* Copy DW_AT_external attribute if it is set. */
3291 if (spec_die.is_external)
3292 part_die->is_external = spec_die.is_external;
3296 /* When using the GNU linker, .gnu.linkonce. sections are used to
3297 eliminate duplicate copies of functions and vtables and such.
3298 The linker will arbitrarily choose one and discard the others.
3299 The AT_*_pc values for such functions refer to local labels in
3300 these sections. If the section from that file was discarded, the
3301 labels are not in the output, so the relocs get a value of 0.
3302 If this is a discarded function, mark the pc bounds as invalid,
3303 so that GDB will ignore it. */
3304 if (has_low_pc_attr && has_high_pc_attr
3305 && part_die->lowpc < part_die->highpc
3306 && (part_die->lowpc != 0
3307 || (bfd_get_file_flags (abfd) & HAS_RELOC)))
3312 /* Read the die from the .debug_info section buffer. And set diep to
3313 point to a newly allocated die with its information. */
3316 read_full_die (diep, abfd, info_ptr)
3317 struct die_info **diep;
3321 unsigned int abbrev_number, bytes_read, i, offset;
3322 struct abbrev_info *abbrev;
3323 struct die_info *die;
3325 offset = info_ptr - dwarf_info_buffer;
3326 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3327 info_ptr += bytes_read;
3330 die = dwarf_alloc_die ();
3332 die->abbrev = abbrev_number;
3338 abbrev = dwarf2_lookup_abbrev (abbrev_number);
3341 error ("Dwarf Error: could not find abbrev number %d.", abbrev_number);
3343 die = dwarf_alloc_die ();
3344 die->offset = offset;
3345 die->tag = abbrev->tag;
3346 die->has_children = abbrev->has_children;
3347 die->abbrev = abbrev_number;
3350 die->num_attrs = abbrev->num_attrs;
3351 die->attrs = (struct attribute *)
3352 xmalloc (die->num_attrs * sizeof (struct attribute));
3354 for (i = 0; i < abbrev->num_attrs; ++i)
3356 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
3364 /* Read an attribute described by an abbreviated attribute. */
3367 read_attribute (attr, abbrev, abfd, info_ptr)
3368 struct attribute *attr;
3369 struct attr_abbrev *abbrev;
3373 unsigned int bytes_read;
3374 struct dwarf_block *blk;
3376 attr->name = abbrev->name;
3377 attr->form = abbrev->form;
3378 switch (abbrev->form)
3381 case DW_FORM_ref_addr:
3382 DW_ADDR (attr) = read_address (abfd, info_ptr);
3383 info_ptr += address_size;
3385 case DW_FORM_block2:
3386 blk = dwarf_alloc_block ();
3387 blk->size = read_2_bytes (abfd, info_ptr);
3389 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
3390 info_ptr += blk->size;
3391 DW_BLOCK (attr) = blk;
3393 case DW_FORM_block4:
3394 blk = dwarf_alloc_block ();
3395 blk->size = read_4_bytes (abfd, info_ptr);
3397 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
3398 info_ptr += blk->size;
3399 DW_BLOCK (attr) = blk;
3402 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
3406 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
3410 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
3413 case DW_FORM_string:
3414 DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
3415 info_ptr += bytes_read;
3418 blk = dwarf_alloc_block ();
3419 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3420 info_ptr += bytes_read;
3421 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
3422 info_ptr += blk->size;
3423 DW_BLOCK (attr) = blk;
3425 case DW_FORM_block1:
3426 blk = dwarf_alloc_block ();
3427 blk->size = read_1_byte (abfd, info_ptr);
3429 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
3430 info_ptr += blk->size;
3431 DW_BLOCK (attr) = blk;
3434 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
3438 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
3442 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
3443 info_ptr += bytes_read;
3446 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3447 info_ptr += bytes_read;
3450 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
3454 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
3458 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
3461 case DW_FORM_ref_udata:
3462 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
3463 info_ptr += bytes_read;
3466 case DW_FORM_indirect:
3468 error ("Dwarf Error: Cannot handle %s in DWARF reader.",
3469 dwarf_form_name (abbrev->form));
3474 /* read dwarf information from a buffer */
3477 read_1_byte (abfd, buf)
3481 return bfd_get_8 (abfd, (bfd_byte *) buf);
3485 read_1_signed_byte (abfd, buf)
3489 return bfd_get_signed_8 (abfd, (bfd_byte *) buf);
3493 read_2_bytes (abfd, buf)
3497 return bfd_get_16 (abfd, (bfd_byte *) buf);
3501 read_2_signed_bytes (abfd, buf)
3505 return bfd_get_signed_16 (abfd, (bfd_byte *) buf);
3509 read_4_bytes (abfd, buf)
3513 return bfd_get_32 (abfd, (bfd_byte *) buf);
3517 read_4_signed_bytes (abfd, buf)
3521 return bfd_get_signed_32 (abfd, (bfd_byte *) buf);
3525 read_8_bytes (abfd, buf)
3529 return bfd_get_64 (abfd, (bfd_byte *) buf);
3533 read_address (abfd, buf)
3537 CORE_ADDR retval = 0;
3539 switch (address_size)
3542 retval = bfd_get_32 (abfd, (bfd_byte *) buf);
3545 retval = bfd_get_64 (abfd, (bfd_byte *) buf);
3548 /* *THE* alternative is 8, right? */
3551 /* If the address being read is larger than the address that is
3552 applicable for the object file format then mask it down to the
3553 correct size. Take care to avoid unnecessary shift or shift
3555 if (address_size > address_significant_size
3556 && address_significant_size < sizeof (CORE_ADDR))
3558 CORE_ADDR mask = ((CORE_ADDR) 0) - 1;
3559 retval &= ~(mask << (address_significant_size * 8));
3565 read_n_bytes (abfd, buf, size)
3570 /* If the size of a host char is 8 bits, we can return a pointer
3571 to the buffer, otherwise we have to copy the data to a buffer
3572 allocated on the temporary obstack. */
3573 #if HOST_CHAR_BIT == 8
3579 ret = obstack_alloc (&dwarf2_tmp_obstack, size);
3580 for (i = 0; i < size; ++i)
3582 ret[i] = bfd_get_8 (abfd, (bfd_byte *) buf);
3590 read_string (abfd, buf, bytes_read_ptr)
3593 unsigned int *bytes_read_ptr;
3595 /* If the size of a host char is 8 bits, we can return a pointer
3596 to the string, otherwise we have to copy the string to a buffer
3597 allocated on the temporary obstack. */
3598 #if HOST_CHAR_BIT == 8
3601 *bytes_read_ptr = 1;
3604 *bytes_read_ptr = strlen (buf) + 1;
3610 while ((byte = bfd_get_8 (abfd, (bfd_byte *) buf)) != 0)
3612 obstack_1grow (&dwarf2_tmp_obstack, byte);
3618 *bytes_read_ptr = 1;
3621 obstack_1grow (&dwarf2_tmp_obstack, '\0');
3622 *bytes_read_ptr = i + 1;
3623 return obstack_finish (&dwarf2_tmp_obstack);
3628 read_unsigned_leb128 (abfd, buf, bytes_read_ptr)
3631 unsigned int *bytes_read_ptr;
3633 unsigned int result, num_read;
3643 byte = bfd_get_8 (abfd, (bfd_byte *) buf);
3646 result |= ((byte & 127) << shift);
3647 if ((byte & 128) == 0)
3653 *bytes_read_ptr = num_read;
3658 read_signed_leb128 (abfd, buf, bytes_read_ptr)
3661 unsigned int *bytes_read_ptr;
3664 int i, shift, size, num_read;
3674 byte = bfd_get_8 (abfd, (bfd_byte *) buf);
3677 result |= ((byte & 127) << shift);
3679 if ((byte & 128) == 0)
3684 if ((shift < size) && (byte & 0x40))
3686 result |= -(1 << shift);
3688 *bytes_read_ptr = num_read;
3693 set_cu_language (lang)
3700 cu_language = language_c;
3702 case DW_LANG_C_plus_plus:
3703 cu_language = language_cplus;
3705 case DW_LANG_Fortran77:
3706 case DW_LANG_Fortran90:
3707 cu_language = language_fortran;
3709 case DW_LANG_Mips_Assembler:
3710 cu_language = language_asm;
3713 case DW_LANG_Cobol74:
3714 case DW_LANG_Cobol85:
3715 case DW_LANG_Pascal83:
3716 case DW_LANG_Modula2:
3718 cu_language = language_unknown;
3721 cu_language_defn = language_def (cu_language);
3724 /* Return the named attribute or NULL if not there. */
3726 static struct attribute *
3727 dwarf_attr (die, name)
3728 struct die_info *die;
3732 struct attribute *spec = NULL;
3734 for (i = 0; i < die->num_attrs; ++i)
3736 if (die->attrs[i].name == name)
3738 return &die->attrs[i];
3740 if (die->attrs[i].name == DW_AT_specification
3741 || die->attrs[i].name == DW_AT_abstract_origin)
3742 spec = &die->attrs[i];
3746 struct die_info *ref_die =
3747 follow_die_ref (dwarf2_get_ref_die_offset (spec));
3750 return dwarf_attr (ref_die, name);
3756 /* Decode the line number information for the compilation unit whose
3757 line number info is at OFFSET in the .debug_line section.
3758 The compilation directory of the file is passed in COMP_DIR. */
3762 unsigned int num_files;
3775 unsigned int num_dirs;
3780 dwarf_decode_lines (offset, comp_dir, abfd)
3781 unsigned int offset;
3787 struct line_head lh;
3788 struct cleanup *back_to;
3789 unsigned int i, bytes_read;
3790 char *cur_file, *cur_dir;
3791 unsigned char op_code, extended_op, adj_opcode;
3793 #define FILE_ALLOC_CHUNK 5
3794 #define DIR_ALLOC_CHUNK 5
3796 struct filenames files;
3797 struct directories dirs;
3799 if (dwarf_line_buffer == NULL)
3801 complain (&dwarf2_missing_line_number_section);
3805 files.num_files = 0;
3811 line_ptr = dwarf_line_buffer + offset;
3813 /* read in the prologue */
3814 lh.total_length = read_4_bytes (abfd, line_ptr);
3816 line_end = line_ptr + lh.total_length;
3817 lh.version = read_2_bytes (abfd, line_ptr);
3819 lh.prologue_length = read_4_bytes (abfd, line_ptr);
3821 lh.minimum_instruction_length = read_1_byte (abfd, line_ptr);
3823 lh.default_is_stmt = read_1_byte (abfd, line_ptr);
3825 lh.line_base = read_1_signed_byte (abfd, line_ptr);
3827 lh.line_range = read_1_byte (abfd, line_ptr);
3829 lh.opcode_base = read_1_byte (abfd, line_ptr);
3831 lh.standard_opcode_lengths = (unsigned char *)
3832 xmalloc (lh.opcode_base * sizeof (unsigned char));
3833 back_to = make_cleanup ((make_cleanup_func) free_current_contents,
3834 &lh.standard_opcode_lengths);
3836 lh.standard_opcode_lengths[0] = 1;
3837 for (i = 1; i < lh.opcode_base; ++i)
3839 lh.standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
3843 /* Read directory table */
3844 while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
3846 line_ptr += bytes_read;
3847 if ((dirs.num_dirs % DIR_ALLOC_CHUNK) == 0)
3849 dirs.dirs = (char **)
3850 xrealloc (dirs.dirs,
3851 (dirs.num_dirs + DIR_ALLOC_CHUNK) * sizeof (char *));
3852 if (dirs.num_dirs == 0)
3853 make_cleanup ((make_cleanup_func) free_current_contents, &dirs.dirs);
3855 dirs.dirs[dirs.num_dirs++] = cur_dir;
3857 line_ptr += bytes_read;
3859 /* Read file name table */
3860 while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
3862 line_ptr += bytes_read;
3863 if ((files.num_files % FILE_ALLOC_CHUNK) == 0)
3865 files.files = (struct fileinfo *)
3866 xrealloc (files.files,
3867 (files.num_files + FILE_ALLOC_CHUNK)
3868 * sizeof (struct fileinfo));
3869 if (files.num_files == 0)
3870 make_cleanup ((make_cleanup_func) free_current_contents,
3873 files.files[files.num_files].name = cur_file;
3874 files.files[files.num_files].dir =
3875 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3876 line_ptr += bytes_read;
3877 files.files[files.num_files].time =
3878 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3879 line_ptr += bytes_read;
3880 files.files[files.num_files].size =
3881 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3882 line_ptr += bytes_read;
3885 line_ptr += bytes_read;
3887 /* Read the statement sequences until there's nothing left. */
3888 while (line_ptr < line_end)
3890 /* state machine registers */
3891 CORE_ADDR address = 0;
3892 unsigned int file = 1;
3893 unsigned int line = 1;
3894 unsigned int column = 0;
3895 int is_stmt = lh.default_is_stmt;
3896 int basic_block = 0;
3897 int end_sequence = 0;
3899 /* Start a subfile for the current file of the state machine. */
3900 if (files.num_files >= file)
3902 /* The file and directory tables are 0 based, the references
3904 dwarf2_start_subfile (files.files[file - 1].name,
3905 (files.files[file - 1].dir
3906 ? dirs.dirs[files.files[file - 1].dir - 1]
3910 /* Decode the table. */
3911 while (! end_sequence)
3913 op_code = read_1_byte (abfd, line_ptr);
3917 case DW_LNS_extended_op:
3918 line_ptr += 1; /* ignore length */
3919 extended_op = read_1_byte (abfd, line_ptr);
3921 switch (extended_op)
3923 case DW_LNE_end_sequence:
3925 record_line (current_subfile, line, address);
3927 case DW_LNE_set_address:
3928 address = read_address (abfd, line_ptr) + baseaddr;
3929 line_ptr += address_size;
3931 case DW_LNE_define_file:
3932 cur_file = read_string (abfd, line_ptr, &bytes_read);
3933 line_ptr += bytes_read;
3934 if ((files.num_files % FILE_ALLOC_CHUNK) == 0)
3936 files.files = (struct fileinfo *)
3937 xrealloc (files.files,
3938 (files.num_files + FILE_ALLOC_CHUNK)
3939 * sizeof (struct fileinfo));
3940 if (files.num_files == 0)
3941 make_cleanup ((make_cleanup_func) free_current_contents,
3944 files.files[files.num_files].name = cur_file;
3945 files.files[files.num_files].dir =
3946 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3947 line_ptr += bytes_read;
3948 files.files[files.num_files].time =
3949 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3950 line_ptr += bytes_read;
3951 files.files[files.num_files].size =
3952 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3953 line_ptr += bytes_read;
3957 complain (&dwarf2_mangled_line_number_section);
3962 record_line (current_subfile, line, address);
3965 case DW_LNS_advance_pc:
3966 address += lh.minimum_instruction_length
3967 * read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3968 line_ptr += bytes_read;
3970 case DW_LNS_advance_line:
3971 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
3972 line_ptr += bytes_read;
3974 case DW_LNS_set_file:
3975 /* The file and directory tables are 0 based, the references
3977 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3978 line_ptr += bytes_read;
3979 dwarf2_start_subfile
3980 (files.files[file - 1].name,
3981 (files.files[file - 1].dir
3982 ? dirs.dirs[files.files[file - 1].dir - 1]
3985 case DW_LNS_set_column:
3986 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
3987 line_ptr += bytes_read;
3989 case DW_LNS_negate_stmt:
3990 is_stmt = (!is_stmt);
3992 case DW_LNS_set_basic_block:
3995 case DW_LNS_const_add_pc:
3996 address += (255 - lh.opcode_base) / lh.line_range;
3998 case DW_LNS_fixed_advance_pc:
3999 address += read_2_bytes (abfd, line_ptr);
4002 default: /* special operand */
4003 adj_opcode = op_code - lh.opcode_base;
4004 address += (adj_opcode / lh.line_range)
4005 * lh.minimum_instruction_length;
4006 line += lh.line_base + (adj_opcode % lh.line_range);
4007 /* append row to matrix using current values */
4008 record_line (current_subfile, line, address);
4014 do_cleanups (back_to);
4017 /* Start a subfile for DWARF. FILENAME is the name of the file and
4018 DIRNAME the name of the source directory which contains FILENAME
4019 or NULL if not known.
4020 This routine tries to keep line numbers from identical absolute and
4021 relative file names in a common subfile.
4023 Using the `list' example from the GDB testsuite, which resides in
4024 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
4025 of /srcdir/list0.c yields the following debugging information for list0.c:
4027 DW_AT_name: /srcdir/list0.c
4028 DW_AT_comp_dir: /compdir
4029 files.files[0].name: list0.h
4030 files.files[0].dir: /srcdir
4031 files.files[1].name: list0.c
4032 files.files[1].dir: /srcdir
4034 The line number information for list0.c has to end up in a single
4035 subfile, so that `break /srcdir/list0.c:1' works as expected. */
4038 dwarf2_start_subfile (filename, dirname)
4042 /* If the filename isn't absolute, try to match an existing subfile
4043 with the full pathname. */
4045 if (*filename != '/' && dirname != NULL)
4047 struct subfile *subfile;
4048 char *fullname = concat (dirname, "/", filename, NULL);
4050 for (subfile = subfiles; subfile; subfile = subfile->next)
4052 if (STREQ (subfile->name, fullname))
4054 current_subfile = subfile;
4061 start_subfile (filename, dirname);
4064 /* Given a pointer to a DWARF information entry, figure out if we need
4065 to make a symbol table entry for it, and if so, create a new entry
4066 and return a pointer to it.
4067 If TYPE is NULL, determine symbol type from the die, otherwise
4068 used the passed type.
4071 static struct symbol *
4072 new_symbol (die, type, objfile)
4073 struct die_info *die;
4075 struct objfile *objfile;
4077 struct symbol *sym = NULL;
4079 struct attribute *attr = NULL;
4080 struct attribute *attr2 = NULL;
4083 name = dwarf2_linkage_name (die);
4086 sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack,
4087 sizeof (struct symbol));
4088 OBJSTAT (objfile, n_syms++);
4089 memset (sym, 0, sizeof (struct symbol));
4090 SYMBOL_NAME (sym) = obsavestring (name, strlen (name),
4091 &objfile->symbol_obstack);
4093 /* Default assumptions.
4094 Use the passed type or decode it from the die. */
4095 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
4096 SYMBOL_CLASS (sym) = LOC_STATIC;
4098 SYMBOL_TYPE (sym) = type;
4100 SYMBOL_TYPE (sym) = die_type (die, objfile);
4101 attr = dwarf_attr (die, DW_AT_decl_line);
4104 SYMBOL_LINE (sym) = DW_UNSND (attr);
4107 /* If this symbol is from a C++ compilation, then attempt to
4108 cache the demangled form for future reference. This is a
4109 typical time versus space tradeoff, that was decided in favor
4110 of time because it sped up C++ symbol lookups by a factor of
4113 SYMBOL_LANGUAGE (sym) = cu_language;
4114 SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack);
4118 attr = dwarf_attr (die, DW_AT_low_pc);
4121 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
4123 SYMBOL_CLASS (sym) = LOC_LABEL;
4125 case DW_TAG_subprogram:
4126 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
4128 SYMBOL_CLASS (sym) = LOC_BLOCK;
4129 attr2 = dwarf_attr (die, DW_AT_external);
4130 if (attr2 && (DW_UNSND (attr2) != 0))
4132 add_symbol_to_list (sym, &global_symbols);
4136 add_symbol_to_list (sym, list_in_scope);
4139 case DW_TAG_variable:
4140 /* Compilation with minimal debug info may result in variables
4141 with missing type entries. Change the misleading `void' type
4142 to something sensible. */
4143 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
4144 SYMBOL_TYPE (sym) = init_type (TYPE_CODE_INT,
4145 TARGET_INT_BIT / HOST_CHAR_BIT, 0,
4146 "<variable, no debug info>",
4148 attr = dwarf_attr (die, DW_AT_const_value);
4151 dwarf2_const_value (attr, sym, objfile);
4152 attr2 = dwarf_attr (die, DW_AT_external);
4153 if (attr2 && (DW_UNSND (attr2) != 0))
4154 add_symbol_to_list (sym, &global_symbols);
4156 add_symbol_to_list (sym, list_in_scope);
4159 attr = dwarf_attr (die, DW_AT_location);
4162 attr2 = dwarf_attr (die, DW_AT_external);
4163 if (attr2 && (DW_UNSND (attr2) != 0))
4165 SYMBOL_VALUE_ADDRESS (sym) =
4166 decode_locdesc (DW_BLOCK (attr), objfile);
4167 add_symbol_to_list (sym, &global_symbols);
4169 /* In shared libraries the address of the variable
4170 in the location descriptor might still be relocatable,
4171 so its value could be zero.
4172 Enter the symbol as a LOC_UNRESOLVED symbol, if its
4173 value is zero, the address of the variable will then
4174 be determined from the minimal symbol table whenever
4175 the variable is referenced. */
4176 if (SYMBOL_VALUE_ADDRESS (sym))
4178 SYMBOL_VALUE_ADDRESS (sym) += baseaddr;
4179 SYMBOL_CLASS (sym) = LOC_STATIC;
4182 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
4186 SYMBOL_VALUE (sym) = addr =
4187 decode_locdesc (DW_BLOCK (attr), objfile);
4188 add_symbol_to_list (sym, list_in_scope);
4191 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
4195 SYMBOL_CLASS (sym) = LOC_REGISTER;
4199 SYMBOL_CLASS (sym) = LOC_BASEREG;
4200 SYMBOL_BASEREG (sym) = basereg;
4204 SYMBOL_CLASS (sym) = LOC_LOCAL;
4208 SYMBOL_CLASS (sym) = LOC_STATIC;
4209 SYMBOL_VALUE_ADDRESS (sym) = addr + baseaddr;
4215 /* We do not know the address of this symbol.
4216 If it is an external symbol and we have type information
4217 for it, enter the symbol as a LOC_UNRESOLVED symbol.
4218 The address of the variable will then be determined from
4219 the minimal symbol table whenever the variable is
4221 attr2 = dwarf_attr (die, DW_AT_external);
4222 if (attr2 && (DW_UNSND (attr2) != 0)
4223 && dwarf_attr (die, DW_AT_type) != NULL)
4225 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
4226 add_symbol_to_list (sym, &global_symbols);
4230 case DW_TAG_formal_parameter:
4231 attr = dwarf_attr (die, DW_AT_location);
4234 SYMBOL_VALUE (sym) = decode_locdesc (DW_BLOCK (attr), objfile);
4237 SYMBOL_CLASS (sym) = LOC_REGPARM;
4241 SYMBOL_CLASS (sym) = LOC_BASEREG_ARG;
4242 SYMBOL_BASEREG (sym) = basereg;
4246 SYMBOL_CLASS (sym) = LOC_ARG;
4249 attr = dwarf_attr (die, DW_AT_const_value);
4252 dwarf2_const_value (attr, sym, objfile);
4254 add_symbol_to_list (sym, list_in_scope);
4256 case DW_TAG_unspecified_parameters:
4257 /* From varargs functions; gdb doesn't seem to have any
4258 interest in this information, so just ignore it for now.
4261 case DW_TAG_class_type:
4262 case DW_TAG_structure_type:
4263 case DW_TAG_union_type:
4264 case DW_TAG_enumeration_type:
4265 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
4266 SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
4267 add_symbol_to_list (sym, list_in_scope);
4269 /* The semantics of C++ state that "struct foo { ... }" also
4270 defines a typedef for "foo". Synthesize a typedef symbol so
4271 that "ptype foo" works as expected. */
4272 if (cu_language == language_cplus)
4274 struct symbol *typedef_sym = (struct symbol *)
4275 obstack_alloc (&objfile->symbol_obstack,
4276 sizeof (struct symbol));
4277 *typedef_sym = *sym;
4278 SYMBOL_NAMESPACE (typedef_sym) = VAR_NAMESPACE;
4279 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
4280 TYPE_NAME (SYMBOL_TYPE (sym)) =
4281 obsavestring (SYMBOL_NAME (sym),
4282 strlen (SYMBOL_NAME (sym)),
4283 &objfile->type_obstack);
4284 add_symbol_to_list (typedef_sym, list_in_scope);
4287 case DW_TAG_typedef:
4288 case DW_TAG_base_type:
4289 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
4290 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
4291 add_symbol_to_list (sym, list_in_scope);
4293 case DW_TAG_enumerator:
4294 attr = dwarf_attr (die, DW_AT_const_value);
4297 dwarf2_const_value (attr, sym, objfile);
4299 add_symbol_to_list (sym, list_in_scope);
4302 /* Not a tag we recognize. Hopefully we aren't processing
4303 trash data, but since we must specifically ignore things
4304 we don't recognize, there is nothing else we should do at
4306 complain (&dwarf2_unsupported_tag, dwarf_tag_name (die->tag));
4313 /* Copy constant value from an attribute to a symbol. */
4316 dwarf2_const_value (attr, sym, objfile)
4317 struct attribute *attr;
4319 struct objfile *objfile;
4321 struct dwarf_block *blk;
4326 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != (unsigned int) address_size)
4327 complain (&dwarf2_const_value_length_mismatch, SYMBOL_NAME (sym),
4328 address_size, TYPE_LENGTH (SYMBOL_TYPE (sym)));
4329 SYMBOL_VALUE_BYTES (sym) = (char *)
4330 obstack_alloc (&objfile->symbol_obstack, address_size);
4331 store_address (SYMBOL_VALUE_BYTES (sym), address_size, DW_ADDR (attr));
4332 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
4334 case DW_FORM_block1:
4335 case DW_FORM_block2:
4336 case DW_FORM_block4:
4338 blk = DW_BLOCK (attr);
4339 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
4340 complain (&dwarf2_const_value_length_mismatch, SYMBOL_NAME (sym),
4341 blk->size, TYPE_LENGTH (SYMBOL_TYPE (sym)));
4342 SYMBOL_VALUE_BYTES (sym) = (char *)
4343 obstack_alloc (&objfile->symbol_obstack, blk->size);
4344 memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
4345 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
4353 SYMBOL_VALUE (sym) = DW_UNSND (attr);
4354 SYMBOL_CLASS (sym) = LOC_CONST;
4357 complain (&dwarf2_unsupported_const_value_attr,
4358 dwarf_form_name (attr->form));
4359 SYMBOL_VALUE (sym) = 0;
4360 SYMBOL_CLASS (sym) = LOC_CONST;
4365 /* Return the type of the die in question using its DW_AT_type attribute. */
4367 static struct type *
4368 die_type (die, objfile)
4369 struct die_info *die;
4370 struct objfile *objfile;
4373 struct attribute *type_attr;
4374 struct die_info *type_die;
4377 type_attr = dwarf_attr (die, DW_AT_type);
4380 /* A missing DW_AT_type represents a void type. */
4381 return dwarf2_fundamental_type (objfile, FT_VOID);
4385 ref = dwarf2_get_ref_die_offset (type_attr);
4386 type_die = follow_die_ref (ref);
4389 error ("Dwarf Error: Cannot find referent at offset %d.", ref);
4393 type = tag_type_to_type (type_die, objfile);
4396 dump_die (type_die);
4397 error ("Dwarf Error: Problem turning type die at offset into gdb type.");
4402 /* Return the containing type of the die in question using its
4403 DW_AT_containing_type attribute. */
4405 static struct type *
4406 die_containing_type (die, objfile)
4407 struct die_info *die;
4408 struct objfile *objfile;
4410 struct type *type = NULL;
4411 struct attribute *type_attr;
4412 struct die_info *type_die = NULL;
4415 type_attr = dwarf_attr (die, DW_AT_containing_type);
4418 ref = dwarf2_get_ref_die_offset (type_attr);
4419 type_die = follow_die_ref (ref);
4422 error ("Dwarf Error: Cannot find referent at offset %d.", ref);
4425 type = tag_type_to_type (type_die, objfile);
4430 dump_die (type_die);
4431 error ("Dwarf Error: Problem turning containing type into gdb type.");
4437 static struct type *
4438 type_at_offset (offset, objfile)
4439 unsigned int offset;
4440 struct objfile *objfile;
4442 struct die_info *die;
4445 die = follow_die_ref (offset);
4448 error ("Dwarf Error: Cannot find type referent at offset %d.", offset);
4451 type = tag_type_to_type (die, objfile);
4456 static struct type *
4457 tag_type_to_type (die, objfile)
4458 struct die_info *die;
4459 struct objfile *objfile;
4467 read_type_die (die, objfile);
4471 error ("Dwarf Error: Cannot find type of die.");
4478 read_type_die (die, objfile)
4479 struct die_info *die;
4480 struct objfile *objfile;
4484 case DW_TAG_class_type:
4485 case DW_TAG_structure_type:
4486 case DW_TAG_union_type:
4487 read_structure_scope (die, objfile);
4489 case DW_TAG_enumeration_type:
4490 read_enumeration (die, objfile);
4492 case DW_TAG_subprogram:
4493 case DW_TAG_subroutine_type:
4494 read_subroutine_type (die, objfile);
4496 case DW_TAG_array_type:
4497 read_array_type (die, objfile);
4499 case DW_TAG_pointer_type:
4500 read_tag_pointer_type (die, objfile);
4502 case DW_TAG_ptr_to_member_type:
4503 read_tag_ptr_to_member_type (die, objfile);
4505 case DW_TAG_reference_type:
4506 read_tag_reference_type (die, objfile);
4508 case DW_TAG_const_type:
4509 read_tag_const_type (die, objfile);
4511 case DW_TAG_volatile_type:
4512 read_tag_volatile_type (die, objfile);
4514 case DW_TAG_string_type:
4515 read_tag_string_type (die, objfile);
4517 case DW_TAG_typedef:
4518 read_typedef (die, objfile);
4520 case DW_TAG_base_type:
4521 read_base_type (die, objfile);
4524 complain (&dwarf2_unexpected_tag, dwarf_tag_name (die->tag));
4529 static struct type *
4530 dwarf_base_type (encoding, size, objfile)
4533 struct objfile *objfile;
4535 /* FIXME - this should not produce a new (struct type *)
4536 every time. It should cache base types. */
4540 case DW_ATE_address:
4541 type = dwarf2_fundamental_type (objfile, FT_VOID);
4543 case DW_ATE_boolean:
4544 type = dwarf2_fundamental_type (objfile, FT_BOOLEAN);
4546 case DW_ATE_complex_float:
4549 type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_COMPLEX);
4553 type = dwarf2_fundamental_type (objfile, FT_COMPLEX);
4559 type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT);
4563 type = dwarf2_fundamental_type (objfile, FT_FLOAT);
4570 type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR);
4573 type = dwarf2_fundamental_type (objfile, FT_SIGNED_SHORT);
4577 type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER);
4581 case DW_ATE_signed_char:
4582 type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR);
4584 case DW_ATE_unsigned:
4588 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR);
4591 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_SHORT);
4595 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_INTEGER);
4599 case DW_ATE_unsigned_char:
4600 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR);
4603 type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER);
4611 struct die_info *old_die;
4613 struct die_info *new_die;
4616 new_die = (struct die_info *) xmalloc (sizeof (struct die_info));
4617 memset (new_die, 0, sizeof (struct die_info));
4619 new_die->tag = old_die->tag;
4620 new_die->has_children = old_die->has_children;
4621 new_die->abbrev = old_die->abbrev;
4622 new_die->offset = old_die->offset;
4623 new_die->type = NULL;
4625 num_attrs = old_die->num_attrs;
4626 new_die->num_attrs = num_attrs;
4627 new_die->attrs = (struct attribute *)
4628 xmalloc (num_attrs * sizeof (struct attribute));
4630 for (i = 0; i < old_die->num_attrs; ++i)
4632 new_die->attrs[i].name = old_die->attrs[i].name;
4633 new_die->attrs[i].form = old_die->attrs[i].form;
4634 new_die->attrs[i].u.addr = old_die->attrs[i].u.addr;
4637 new_die->next = NULL;
4642 /* Return sibling of die, NULL if no sibling. */
4646 struct die_info *die;
4648 int nesting_level = 0;
4650 if (!die->has_children)
4652 if (die->next && (die->next->tag == 0))
4665 if (die->has_children)
4675 while (nesting_level);
4676 if (die && (die->tag == 0))
4687 /* Get linkage name of a die, return NULL if not found. */
4690 dwarf2_linkage_name (die)
4691 struct die_info *die;
4693 struct attribute *attr;
4695 attr = dwarf_attr (die, DW_AT_MIPS_linkage_name);
4696 if (attr && DW_STRING (attr))
4697 return DW_STRING (attr);
4698 attr = dwarf_attr (die, DW_AT_name);
4699 if (attr && DW_STRING (attr))
4700 return DW_STRING (attr);
4704 /* Convert a DIE tag into its string name. */
4707 dwarf_tag_name (tag)
4708 register unsigned tag;
4712 case DW_TAG_padding:
4713 return "DW_TAG_padding";
4714 case DW_TAG_array_type:
4715 return "DW_TAG_array_type";
4716 case DW_TAG_class_type:
4717 return "DW_TAG_class_type";
4718 case DW_TAG_entry_point:
4719 return "DW_TAG_entry_point";
4720 case DW_TAG_enumeration_type:
4721 return "DW_TAG_enumeration_type";
4722 case DW_TAG_formal_parameter:
4723 return "DW_TAG_formal_parameter";
4724 case DW_TAG_imported_declaration:
4725 return "DW_TAG_imported_declaration";
4727 return "DW_TAG_label";
4728 case DW_TAG_lexical_block:
4729 return "DW_TAG_lexical_block";
4731 return "DW_TAG_member";
4732 case DW_TAG_pointer_type:
4733 return "DW_TAG_pointer_type";
4734 case DW_TAG_reference_type:
4735 return "DW_TAG_reference_type";
4736 case DW_TAG_compile_unit:
4737 return "DW_TAG_compile_unit";
4738 case DW_TAG_string_type:
4739 return "DW_TAG_string_type";
4740 case DW_TAG_structure_type:
4741 return "DW_TAG_structure_type";
4742 case DW_TAG_subroutine_type:
4743 return "DW_TAG_subroutine_type";
4744 case DW_TAG_typedef:
4745 return "DW_TAG_typedef";
4746 case DW_TAG_union_type:
4747 return "DW_TAG_union_type";
4748 case DW_TAG_unspecified_parameters:
4749 return "DW_TAG_unspecified_parameters";
4750 case DW_TAG_variant:
4751 return "DW_TAG_variant";
4752 case DW_TAG_common_block:
4753 return "DW_TAG_common_block";
4754 case DW_TAG_common_inclusion:
4755 return "DW_TAG_common_inclusion";
4756 case DW_TAG_inheritance:
4757 return "DW_TAG_inheritance";
4758 case DW_TAG_inlined_subroutine:
4759 return "DW_TAG_inlined_subroutine";
4761 return "DW_TAG_module";
4762 case DW_TAG_ptr_to_member_type:
4763 return "DW_TAG_ptr_to_member_type";
4764 case DW_TAG_set_type:
4765 return "DW_TAG_set_type";
4766 case DW_TAG_subrange_type:
4767 return "DW_TAG_subrange_type";
4768 case DW_TAG_with_stmt:
4769 return "DW_TAG_with_stmt";
4770 case DW_TAG_access_declaration:
4771 return "DW_TAG_access_declaration";
4772 case DW_TAG_base_type:
4773 return "DW_TAG_base_type";
4774 case DW_TAG_catch_block:
4775 return "DW_TAG_catch_block";
4776 case DW_TAG_const_type:
4777 return "DW_TAG_const_type";
4778 case DW_TAG_constant:
4779 return "DW_TAG_constant";
4780 case DW_TAG_enumerator:
4781 return "DW_TAG_enumerator";
4782 case DW_TAG_file_type:
4783 return "DW_TAG_file_type";
4785 return "DW_TAG_friend";
4786 case DW_TAG_namelist:
4787 return "DW_TAG_namelist";
4788 case DW_TAG_namelist_item:
4789 return "DW_TAG_namelist_item";
4790 case DW_TAG_packed_type:
4791 return "DW_TAG_packed_type";
4792 case DW_TAG_subprogram:
4793 return "DW_TAG_subprogram";
4794 case DW_TAG_template_type_param:
4795 return "DW_TAG_template_type_param";
4796 case DW_TAG_template_value_param:
4797 return "DW_TAG_template_value_param";
4798 case DW_TAG_thrown_type:
4799 return "DW_TAG_thrown_type";
4800 case DW_TAG_try_block:
4801 return "DW_TAG_try_block";
4802 case DW_TAG_variant_part:
4803 return "DW_TAG_variant_part";
4804 case DW_TAG_variable:
4805 return "DW_TAG_variable";
4806 case DW_TAG_volatile_type:
4807 return "DW_TAG_volatile_type";
4808 case DW_TAG_MIPS_loop:
4809 return "DW_TAG_MIPS_loop";
4810 case DW_TAG_format_label:
4811 return "DW_TAG_format_label";
4812 case DW_TAG_function_template:
4813 return "DW_TAG_function_template";
4814 case DW_TAG_class_template:
4815 return "DW_TAG_class_template";
4817 return "DW_TAG_<unknown>";
4821 /* Convert a DWARF attribute code into its string name. */
4824 dwarf_attr_name (attr)
4825 register unsigned attr;
4830 return "DW_AT_sibling";
4831 case DW_AT_location:
4832 return "DW_AT_location";
4834 return "DW_AT_name";
4835 case DW_AT_ordering:
4836 return "DW_AT_ordering";
4837 case DW_AT_subscr_data:
4838 return "DW_AT_subscr_data";
4839 case DW_AT_byte_size:
4840 return "DW_AT_byte_size";
4841 case DW_AT_bit_offset:
4842 return "DW_AT_bit_offset";
4843 case DW_AT_bit_size:
4844 return "DW_AT_bit_size";
4845 case DW_AT_element_list:
4846 return "DW_AT_element_list";
4847 case DW_AT_stmt_list:
4848 return "DW_AT_stmt_list";
4850 return "DW_AT_low_pc";
4852 return "DW_AT_high_pc";
4853 case DW_AT_language:
4854 return "DW_AT_language";
4856 return "DW_AT_member";
4858 return "DW_AT_discr";
4859 case DW_AT_discr_value:
4860 return "DW_AT_discr_value";
4861 case DW_AT_visibility:
4862 return "DW_AT_visibility";
4864 return "DW_AT_import";
4865 case DW_AT_string_length:
4866 return "DW_AT_string_length";
4867 case DW_AT_common_reference:
4868 return "DW_AT_common_reference";
4869 case DW_AT_comp_dir:
4870 return "DW_AT_comp_dir";
4871 case DW_AT_const_value:
4872 return "DW_AT_const_value";
4873 case DW_AT_containing_type:
4874 return "DW_AT_containing_type";
4875 case DW_AT_default_value:
4876 return "DW_AT_default_value";
4878 return "DW_AT_inline";
4879 case DW_AT_is_optional:
4880 return "DW_AT_is_optional";
4881 case DW_AT_lower_bound:
4882 return "DW_AT_lower_bound";
4883 case DW_AT_producer:
4884 return "DW_AT_producer";
4885 case DW_AT_prototyped:
4886 return "DW_AT_prototyped";
4887 case DW_AT_return_addr:
4888 return "DW_AT_return_addr";
4889 case DW_AT_start_scope:
4890 return "DW_AT_start_scope";
4891 case DW_AT_stride_size:
4892 return "DW_AT_stride_size";
4893 case DW_AT_upper_bound:
4894 return "DW_AT_upper_bound";
4895 case DW_AT_abstract_origin:
4896 return "DW_AT_abstract_origin";
4897 case DW_AT_accessibility:
4898 return "DW_AT_accessibility";
4899 case DW_AT_address_class:
4900 return "DW_AT_address_class";
4901 case DW_AT_artificial:
4902 return "DW_AT_artificial";
4903 case DW_AT_base_types:
4904 return "DW_AT_base_types";
4905 case DW_AT_calling_convention:
4906 return "DW_AT_calling_convention";
4908 return "DW_AT_count";
4909 case DW_AT_data_member_location:
4910 return "DW_AT_data_member_location";
4911 case DW_AT_decl_column:
4912 return "DW_AT_decl_column";
4913 case DW_AT_decl_file:
4914 return "DW_AT_decl_file";
4915 case DW_AT_decl_line:
4916 return "DW_AT_decl_line";
4917 case DW_AT_declaration:
4918 return "DW_AT_declaration";
4919 case DW_AT_discr_list:
4920 return "DW_AT_discr_list";
4921 case DW_AT_encoding:
4922 return "DW_AT_encoding";
4923 case DW_AT_external:
4924 return "DW_AT_external";
4925 case DW_AT_frame_base:
4926 return "DW_AT_frame_base";
4928 return "DW_AT_friend";
4929 case DW_AT_identifier_case:
4930 return "DW_AT_identifier_case";
4931 case DW_AT_macro_info:
4932 return "DW_AT_macro_info";
4933 case DW_AT_namelist_items:
4934 return "DW_AT_namelist_items";
4935 case DW_AT_priority:
4936 return "DW_AT_priority";
4938 return "DW_AT_segment";
4939 case DW_AT_specification:
4940 return "DW_AT_specification";
4941 case DW_AT_static_link:
4942 return "DW_AT_static_link";
4944 return "DW_AT_type";
4945 case DW_AT_use_location:
4946 return "DW_AT_use_location";
4947 case DW_AT_variable_parameter:
4948 return "DW_AT_variable_parameter";
4949 case DW_AT_virtuality:
4950 return "DW_AT_virtuality";
4951 case DW_AT_vtable_elem_location:
4952 return "DW_AT_vtable_elem_location";
4955 case DW_AT_MIPS_fde:
4956 return "DW_AT_MIPS_fde";
4957 case DW_AT_MIPS_loop_begin:
4958 return "DW_AT_MIPS_loop_begin";
4959 case DW_AT_MIPS_tail_loop_begin:
4960 return "DW_AT_MIPS_tail_loop_begin";
4961 case DW_AT_MIPS_epilog_begin:
4962 return "DW_AT_MIPS_epilog_begin";
4963 case DW_AT_MIPS_loop_unroll_factor:
4964 return "DW_AT_MIPS_loop_unroll_factor";
4965 case DW_AT_MIPS_software_pipeline_depth:
4966 return "DW_AT_MIPS_software_pipeline_depth";
4967 case DW_AT_MIPS_linkage_name:
4968 return "DW_AT_MIPS_linkage_name";
4971 case DW_AT_sf_names:
4972 return "DW_AT_sf_names";
4973 case DW_AT_src_info:
4974 return "DW_AT_src_info";
4975 case DW_AT_mac_info:
4976 return "DW_AT_mac_info";
4977 case DW_AT_src_coords:
4978 return "DW_AT_src_coords";
4979 case DW_AT_body_begin:
4980 return "DW_AT_body_begin";
4981 case DW_AT_body_end:
4982 return "DW_AT_body_end";
4984 return "DW_AT_<unknown>";
4988 /* Convert a DWARF value form code into its string name. */
4991 dwarf_form_name (form)
4992 register unsigned form;
4997 return "DW_FORM_addr";
4998 case DW_FORM_block2:
4999 return "DW_FORM_block2";
5000 case DW_FORM_block4:
5001 return "DW_FORM_block4";
5003 return "DW_FORM_data2";
5005 return "DW_FORM_data4";
5007 return "DW_FORM_data8";
5008 case DW_FORM_string:
5009 return "DW_FORM_string";
5011 return "DW_FORM_block";
5012 case DW_FORM_block1:
5013 return "DW_FORM_block1";
5015 return "DW_FORM_data1";
5017 return "DW_FORM_flag";
5019 return "DW_FORM_sdata";
5021 return "DW_FORM_strp";
5023 return "DW_FORM_udata";
5024 case DW_FORM_ref_addr:
5025 return "DW_FORM_ref_addr";
5027 return "DW_FORM_ref1";
5029 return "DW_FORM_ref2";
5031 return "DW_FORM_ref4";
5033 return "DW_FORM_ref8";
5034 case DW_FORM_ref_udata:
5035 return "DW_FORM_ref_udata";
5036 case DW_FORM_indirect:
5037 return "DW_FORM_indirect";
5039 return "DW_FORM_<unknown>";
5043 /* Convert a DWARF stack opcode into its string name. */
5046 dwarf_stack_op_name (op)
5047 register unsigned op;
5052 return "DW_OP_addr";
5054 return "DW_OP_deref";
5056 return "DW_OP_const1u";
5058 return "DW_OP_const1s";
5060 return "DW_OP_const2u";
5062 return "DW_OP_const2s";
5064 return "DW_OP_const4u";
5066 return "DW_OP_const4s";
5068 return "DW_OP_const8u";
5070 return "DW_OP_const8s";
5072 return "DW_OP_constu";
5074 return "DW_OP_consts";
5078 return "DW_OP_drop";
5080 return "DW_OP_over";
5082 return "DW_OP_pick";
5084 return "DW_OP_swap";
5088 return "DW_OP_xderef";
5096 return "DW_OP_minus";
5108 return "DW_OP_plus";
5109 case DW_OP_plus_uconst:
5110 return "DW_OP_plus_uconst";
5116 return "DW_OP_shra";
5134 return "DW_OP_skip";
5136 return "DW_OP_lit0";
5138 return "DW_OP_lit1";
5140 return "DW_OP_lit2";
5142 return "DW_OP_lit3";
5144 return "DW_OP_lit4";
5146 return "DW_OP_lit5";
5148 return "DW_OP_lit6";
5150 return "DW_OP_lit7";
5152 return "DW_OP_lit8";
5154 return "DW_OP_lit9";
5156 return "DW_OP_lit10";
5158 return "DW_OP_lit11";
5160 return "DW_OP_lit12";
5162 return "DW_OP_lit13";
5164 return "DW_OP_lit14";
5166 return "DW_OP_lit15";
5168 return "DW_OP_lit16";
5170 return "DW_OP_lit17";
5172 return "DW_OP_lit18";
5174 return "DW_OP_lit19";
5176 return "DW_OP_lit20";
5178 return "DW_OP_lit21";
5180 return "DW_OP_lit22";
5182 return "DW_OP_lit23";
5184 return "DW_OP_lit24";
5186 return "DW_OP_lit25";
5188 return "DW_OP_lit26";
5190 return "DW_OP_lit27";
5192 return "DW_OP_lit28";
5194 return "DW_OP_lit29";
5196 return "DW_OP_lit30";
5198 return "DW_OP_lit31";
5200 return "DW_OP_reg0";
5202 return "DW_OP_reg1";
5204 return "DW_OP_reg2";
5206 return "DW_OP_reg3";
5208 return "DW_OP_reg4";
5210 return "DW_OP_reg5";
5212 return "DW_OP_reg6";
5214 return "DW_OP_reg7";
5216 return "DW_OP_reg8";
5218 return "DW_OP_reg9";
5220 return "DW_OP_reg10";
5222 return "DW_OP_reg11";
5224 return "DW_OP_reg12";
5226 return "DW_OP_reg13";
5228 return "DW_OP_reg14";
5230 return "DW_OP_reg15";
5232 return "DW_OP_reg16";
5234 return "DW_OP_reg17";
5236 return "DW_OP_reg18";
5238 return "DW_OP_reg19";
5240 return "DW_OP_reg20";
5242 return "DW_OP_reg21";
5244 return "DW_OP_reg22";
5246 return "DW_OP_reg23";
5248 return "DW_OP_reg24";
5250 return "DW_OP_reg25";
5252 return "DW_OP_reg26";
5254 return "DW_OP_reg27";
5256 return "DW_OP_reg28";
5258 return "DW_OP_reg29";
5260 return "DW_OP_reg30";
5262 return "DW_OP_reg31";
5264 return "DW_OP_breg0";
5266 return "DW_OP_breg1";
5268 return "DW_OP_breg2";
5270 return "DW_OP_breg3";
5272 return "DW_OP_breg4";
5274 return "DW_OP_breg5";
5276 return "DW_OP_breg6";
5278 return "DW_OP_breg7";
5280 return "DW_OP_breg8";
5282 return "DW_OP_breg9";
5284 return "DW_OP_breg10";
5286 return "DW_OP_breg11";
5288 return "DW_OP_breg12";
5290 return "DW_OP_breg13";
5292 return "DW_OP_breg14";
5294 return "DW_OP_breg15";
5296 return "DW_OP_breg16";
5298 return "DW_OP_breg17";
5300 return "DW_OP_breg18";
5302 return "DW_OP_breg19";
5304 return "DW_OP_breg20";
5306 return "DW_OP_breg21";
5308 return "DW_OP_breg22";
5310 return "DW_OP_breg23";
5312 return "DW_OP_breg24";
5314 return "DW_OP_breg25";
5316 return "DW_OP_breg26";
5318 return "DW_OP_breg27";
5320 return "DW_OP_breg28";
5322 return "DW_OP_breg29";
5324 return "DW_OP_breg30";
5326 return "DW_OP_breg31";
5328 return "DW_OP_regx";
5330 return "DW_OP_fbreg";
5332 return "DW_OP_bregx";
5334 return "DW_OP_piece";
5335 case DW_OP_deref_size:
5336 return "DW_OP_deref_size";
5337 case DW_OP_xderef_size:
5338 return "DW_OP_xderef_size";
5342 return "OP_<unknown>";
5347 dwarf_bool_name (bool)
5356 /* Convert a DWARF type code into its string name. */
5359 dwarf_type_encoding_name (enc)
5360 register unsigned enc;
5364 case DW_ATE_address:
5365 return "DW_ATE_address";
5366 case DW_ATE_boolean:
5367 return "DW_ATE_boolean";
5368 case DW_ATE_complex_float:
5369 return "DW_ATE_complex_float";
5371 return "DW_ATE_float";
5373 return "DW_ATE_signed";
5374 case DW_ATE_signed_char:
5375 return "DW_ATE_signed_char";
5376 case DW_ATE_unsigned:
5377 return "DW_ATE_unsigned";
5378 case DW_ATE_unsigned_char:
5379 return "DW_ATE_unsigned_char";
5381 return "DW_ATE_<unknown>";
5385 /* Convert a DWARF call frame info operation to its string name. */
5389 dwarf_cfi_name (cfi_opc)
5390 register unsigned cfi_opc;
5394 case DW_CFA_advance_loc:
5395 return "DW_CFA_advance_loc";
5397 return "DW_CFA_offset";
5398 case DW_CFA_restore:
5399 return "DW_CFA_restore";
5401 return "DW_CFA_nop";
5402 case DW_CFA_set_loc:
5403 return "DW_CFA_set_loc";
5404 case DW_CFA_advance_loc1:
5405 return "DW_CFA_advance_loc1";
5406 case DW_CFA_advance_loc2:
5407 return "DW_CFA_advance_loc2";
5408 case DW_CFA_advance_loc4:
5409 return "DW_CFA_advance_loc4";
5410 case DW_CFA_offset_extended:
5411 return "DW_CFA_offset_extended";
5412 case DW_CFA_restore_extended:
5413 return "DW_CFA_restore_extended";
5414 case DW_CFA_undefined:
5415 return "DW_CFA_undefined";
5416 case DW_CFA_same_value:
5417 return "DW_CFA_same_value";
5418 case DW_CFA_register:
5419 return "DW_CFA_register";
5420 case DW_CFA_remember_state:
5421 return "DW_CFA_remember_state";
5422 case DW_CFA_restore_state:
5423 return "DW_CFA_restore_state";
5424 case DW_CFA_def_cfa:
5425 return "DW_CFA_def_cfa";
5426 case DW_CFA_def_cfa_register:
5427 return "DW_CFA_def_cfa_register";
5428 case DW_CFA_def_cfa_offset:
5429 return "DW_CFA_def_cfa_offset";
5430 /* SGI/MIPS specific */
5431 case DW_CFA_MIPS_advance_loc8:
5432 return "DW_CFA_MIPS_advance_loc8";
5434 return "DW_CFA_<unknown>";
5441 struct die_info *die;
5445 fprintf (stderr, "Die: %s (abbrev = %d, offset = %d)\n",
5446 dwarf_tag_name (die->tag), die->abbrev, die->offset);
5447 fprintf (stderr, "\thas children: %s\n",
5448 dwarf_bool_name (die->has_children));
5450 fprintf (stderr, "\tattributes:\n");
5451 for (i = 0; i < die->num_attrs; ++i)
5453 fprintf (stderr, "\t\t%s (%s) ",
5454 dwarf_attr_name (die->attrs[i].name),
5455 dwarf_form_name (die->attrs[i].form));
5456 switch (die->attrs[i].form)
5458 case DW_FORM_ref_addr:
5460 fprintf (stderr, "address: ");
5461 print_address_numeric (DW_ADDR (&die->attrs[i]), 1, stderr);
5463 case DW_FORM_block2:
5464 case DW_FORM_block4:
5466 case DW_FORM_block1:
5467 fprintf (stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
5477 fprintf (stderr, "constant: %d", DW_UNSND (&die->attrs[i]));
5479 case DW_FORM_string:
5480 fprintf (stderr, "string: \"%s\"",
5481 DW_STRING (&die->attrs[i])
5482 ? DW_STRING (&die->attrs[i]) : "");
5485 if (DW_UNSND (&die->attrs[i]))
5486 fprintf (stderr, "flag: TRUE");
5488 fprintf (stderr, "flag: FALSE");
5490 case DW_FORM_strp: /* we do not support separate string
5492 case DW_FORM_indirect: /* we do not handle indirect yet */
5493 case DW_FORM_data8: /* we do not have 64 bit quantities */
5495 fprintf (stderr, "unsupported attribute form: %d.",
5496 die->attrs[i].form);
5498 fprintf (stderr, "\n");
5504 struct die_info *die;
5514 store_in_ref_table (offset, die)
5515 unsigned int offset;
5516 struct die_info *die;
5519 struct die_info *old;
5521 h = (offset % REF_HASH_SIZE);
5522 old = die_ref_table[h];
5523 die->next_ref = old;
5524 die_ref_table[h] = die;
5529 dwarf2_empty_die_ref_table ()
5531 memset (die_ref_table, 0, sizeof (die_ref_table));
5535 dwarf2_get_ref_die_offset (attr)
5536 struct attribute *attr;
5538 unsigned int result = 0;
5542 case DW_FORM_ref_addr:
5543 result = DW_ADDR (attr);
5548 case DW_FORM_ref_udata:
5549 result = cu_header_offset + DW_UNSND (attr);
5552 complain (&dwarf2_unsupported_die_ref_attr, dwarf_form_name (attr->form));
5558 follow_die_ref (offset)
5559 unsigned int offset;
5561 struct die_info *die;
5564 h = (offset % REF_HASH_SIZE);
5565 die = die_ref_table[h];
5568 if (die->offset == offset)
5572 die = die->next_ref;
5577 static struct type *
5578 dwarf2_fundamental_type (objfile, typeid)
5579 struct objfile *objfile;
5582 if (typeid < 0 || typeid >= FT_NUM_MEMBERS)
5584 error ("Dwarf Error: internal error - invalid fundamental type id %d.",
5588 /* Look for this particular type in the fundamental type vector. If
5589 one is not found, create and install one appropriate for the
5590 current language and the current target machine. */
5592 if (ftypes[typeid] == NULL)
5594 ftypes[typeid] = cu_language_defn->la_fund_type (objfile, typeid);
5597 return (ftypes[typeid]);
5600 /* Decode simple location descriptions.
5601 Given a pointer to a dwarf block that defines a location, compute
5602 the location and return the value.
5604 FIXME: This is a kludge until we figure out a better
5605 way to handle the location descriptions.
5606 Gdb's design does not mesh well with the DWARF2 notion of a location
5607 computing interpreter, which is a shame because the flexibility goes unused.
5608 FIXME: Implement more operations as necessary.
5610 A location description containing no operations indicates that the
5611 object is optimized out. The global optimized_out flag is set for
5612 those, the return value is meaningless.
5614 When the result is a register number, the global isreg flag is set,
5615 otherwise it is cleared.
5617 When the result is a base register offset, the global offreg flag is set
5618 and the register number is returned in basereg, otherwise it is cleared.
5620 When the DW_OP_fbreg operation is encountered without a corresponding
5621 DW_AT_frame_base attribute, the global islocal flag is set.
5622 Hopefully the machine dependent code knows how to set up a virtual
5623 frame pointer for the local references.
5625 Note that stack[0] is unused except as a default error return.
5626 Note that stack overflow is not yet handled. */
5629 decode_locdesc (blk, objfile)
5630 struct dwarf_block *blk;
5631 struct objfile *objfile;
5634 int size = blk->size;
5635 char *data = blk->data;
5636 CORE_ADDR stack[64];
5638 unsigned int bytes_read, unsnd;
5688 stack[++stacki] = op - DW_OP_reg0;
5693 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
5695 #if defined(HARRIS_TARGET) && defined(_M88K)
5696 /* The Harris 88110 gdb ports have long kept their special reg
5697 numbers between their gp-regs and their x-regs. This is
5698 not how our dwarf is generated. Punt. */
5701 stack[++stacki] = unsnd;
5737 basereg = op - DW_OP_breg0;
5738 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
5743 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
5745 if (frame_base_reg >= 0)
5748 basereg = frame_base_reg;
5749 stack[stacki] += frame_base_offset;
5753 complain (&dwarf2_missing_at_frame_base);
5759 stack[++stacki] = read_address (objfile->obfd, &data[i]);
5764 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
5769 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
5774 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
5779 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
5784 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
5789 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
5794 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
5800 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
5805 stack[stacki - 1] += stack[stacki];
5809 case DW_OP_plus_uconst:
5810 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
5815 stack[stacki - 1] = stack[stacki] - stack[stacki - 1];
5820 complain (&dwarf2_unsupported_stack_op, dwarf_stack_op_name(op));
5821 return (stack[stacki]);
5824 return (stack[stacki]);
5827 /* memory allocation interface */
5831 dwarf2_free_tmp_obstack (ignore)
5834 obstack_free (&dwarf2_tmp_obstack, NULL);
5837 static struct dwarf_block *
5838 dwarf_alloc_block ()
5840 struct dwarf_block *blk;
5842 blk = (struct dwarf_block *)
5843 obstack_alloc (&dwarf2_tmp_obstack, sizeof (struct dwarf_block));
5847 static struct abbrev_info *
5848 dwarf_alloc_abbrev ()
5850 struct abbrev_info *abbrev;
5852 abbrev = (struct abbrev_info *) xmalloc (sizeof (struct abbrev_info));
5853 memset (abbrev, 0, sizeof (struct abbrev_info));
5857 static struct die_info *
5860 struct die_info *die;
5862 die = (struct die_info *) xmalloc (sizeof (struct die_info));
5863 memset (die, 0, sizeof (struct die_info));