1 /* DWARF 2 debugging format support for GDB.
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
5 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
6 Inc. with support from Florida State University (under contract
7 with the Ada Joint Program Office), and Silicon Graphics, Inc.
8 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
9 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
10 support in dwarfread.c
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 2 of the License, or (at
17 your option) any later version.
19 This program is distributed in the hope that it will be useful, but
20 WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program; if not, write to the Free Software
26 Foundation, Inc., 59 Temple Place - Suite 330,
27 Boston, MA 02111-1307, USA. */
35 #include "elf/dwarf2.h"
38 #include "expression.h"
39 #include "filenames.h" /* for DOSish file names */
42 #include "complaints.h"
44 #include "dwarf2expr.h"
45 #include "dwarf2loc.h"
46 #include "cp-support.h"
49 #include "gdb_string.h"
50 #include "gdb_assert.h"
51 #include <sys/types.h>
53 #ifndef DWARF2_REG_TO_REGNUM
54 #define DWARF2_REG_TO_REGNUM(REG) (REG)
58 /* .debug_info header for a compilation unit
59 Because of alignment constraints, this structure has padding and cannot
60 be mapped directly onto the beginning of the .debug_info section. */
61 typedef struct comp_unit_header
63 unsigned int length
; /* length of the .debug_info
65 unsigned short version
; /* version number -- 2 for DWARF
67 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
68 unsigned char addr_size
; /* byte size of an address -- 4 */
71 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
74 /* .debug_pubnames header
75 Because of alignment constraints, this structure has padding and cannot
76 be mapped directly onto the beginning of the .debug_info section. */
77 typedef struct pubnames_header
79 unsigned int length
; /* length of the .debug_pubnames
81 unsigned char version
; /* version number -- 2 for DWARF
83 unsigned int info_offset
; /* offset into .debug_info section */
84 unsigned int info_size
; /* byte size of .debug_info section
88 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
90 /* .debug_pubnames header
91 Because of alignment constraints, this structure has padding and cannot
92 be mapped directly onto the beginning of the .debug_info section. */
93 typedef struct aranges_header
95 unsigned int length
; /* byte len of the .debug_aranges
97 unsigned short version
; /* version number -- 2 for DWARF
99 unsigned int info_offset
; /* offset into .debug_info section */
100 unsigned char addr_size
; /* byte size of an address */
101 unsigned char seg_size
; /* byte size of segment descriptor */
104 #define _ACTUAL_ARANGES_HEADER_SIZE 12
106 /* .debug_line statement program prologue
107 Because of alignment constraints, this structure has padding and cannot
108 be mapped directly onto the beginning of the .debug_info section. */
109 typedef struct statement_prologue
111 unsigned int total_length
; /* byte length of the statement
113 unsigned short version
; /* version number -- 2 for DWARF
115 unsigned int prologue_length
; /* # bytes between prologue &
117 unsigned char minimum_instruction_length
; /* byte size of
119 unsigned char default_is_stmt
; /* initial value of is_stmt
122 unsigned char line_range
;
123 unsigned char opcode_base
; /* number assigned to first special
125 unsigned char *standard_opcode_lengths
;
129 /* offsets and sizes of debugging sections */
131 static file_ptr dwarf_info_offset
;
132 static file_ptr dwarf_abbrev_offset
;
133 static file_ptr dwarf_line_offset
;
134 static file_ptr dwarf_pubnames_offset
;
135 static file_ptr dwarf_aranges_offset
;
136 static file_ptr dwarf_loc_offset
;
137 static file_ptr dwarf_macinfo_offset
;
138 static file_ptr dwarf_str_offset
;
139 static file_ptr dwarf_ranges_offset
;
140 file_ptr dwarf_frame_offset
;
141 file_ptr dwarf_eh_frame_offset
;
143 static unsigned int dwarf_info_size
;
144 static unsigned int dwarf_abbrev_size
;
145 static unsigned int dwarf_line_size
;
146 static unsigned int dwarf_pubnames_size
;
147 static unsigned int dwarf_aranges_size
;
148 static unsigned int dwarf_loc_size
;
149 static unsigned int dwarf_macinfo_size
;
150 static unsigned int dwarf_str_size
;
151 static unsigned int dwarf_ranges_size
;
152 unsigned int dwarf_frame_size
;
153 unsigned int dwarf_eh_frame_size
;
155 static asection
*dwarf_info_section
;
156 static asection
*dwarf_abbrev_section
;
157 static asection
*dwarf_line_section
;
158 static asection
*dwarf_pubnames_section
;
159 static asection
*dwarf_aranges_section
;
160 static asection
*dwarf_loc_section
;
161 static asection
*dwarf_macinfo_section
;
162 static asection
*dwarf_str_section
;
163 static asection
*dwarf_ranges_section
;
164 asection
*dwarf_frame_section
;
165 asection
*dwarf_eh_frame_section
;
167 /* names of the debugging sections */
169 #define INFO_SECTION ".debug_info"
170 #define ABBREV_SECTION ".debug_abbrev"
171 #define LINE_SECTION ".debug_line"
172 #define PUBNAMES_SECTION ".debug_pubnames"
173 #define ARANGES_SECTION ".debug_aranges"
174 #define LOC_SECTION ".debug_loc"
175 #define MACINFO_SECTION ".debug_macinfo"
176 #define STR_SECTION ".debug_str"
177 #define RANGES_SECTION ".debug_ranges"
178 #define FRAME_SECTION ".debug_frame"
179 #define EH_FRAME_SECTION ".eh_frame"
181 /* local data types */
183 /* We hold several abbreviation tables in memory at the same time. */
184 #ifndef ABBREV_HASH_SIZE
185 #define ABBREV_HASH_SIZE 121
188 /* The data in a compilation unit header, after target2host
189 translation, looks like this. */
190 struct comp_unit_head
192 unsigned long length
;
194 unsigned int abbrev_offset
;
195 unsigned char addr_size
;
196 unsigned char signed_addr_p
;
197 unsigned int offset_size
; /* size of file offsets; either 4 or 8 */
198 unsigned int initial_length_size
; /* size of the length field; either
201 /* Offset to the first byte of this compilation unit header in the
202 * .debug_info section, for resolving relative reference dies. */
206 /* Pointer to this compilation unit header in the .debug_info
211 /* Pointer to the first die of this compilatio unit. This will
212 * be the first byte following the compilation unit header. */
216 /* Pointer to the next compilation unit header in the program. */
218 struct comp_unit_head
*next
;
220 /* DWARF abbreviation table associated with this compilation unit */
222 struct abbrev_info
*dwarf2_abbrevs
[ABBREV_HASH_SIZE
];
224 /* Base address of this compilation unit. */
226 CORE_ADDR base_address
;
228 /* Non-zero if base_address has been set. */
233 /* The line number information for a compilation unit (found in the
234 .debug_line section) begins with a "statement program header",
235 which contains the following information. */
238 unsigned int total_length
;
239 unsigned short version
;
240 unsigned int header_length
;
241 unsigned char minimum_instruction_length
;
242 unsigned char default_is_stmt
;
244 unsigned char line_range
;
245 unsigned char opcode_base
;
247 /* standard_opcode_lengths[i] is the number of operands for the
248 standard opcode whose value is i. This means that
249 standard_opcode_lengths[0] is unused, and the last meaningful
250 element is standard_opcode_lengths[opcode_base - 1]. */
251 unsigned char *standard_opcode_lengths
;
253 /* The include_directories table. NOTE! These strings are not
254 allocated with xmalloc; instead, they are pointers into
255 debug_line_buffer. If you try to free them, `free' will get
257 unsigned int num_include_dirs
, include_dirs_size
;
260 /* The file_names table. NOTE! These strings are not allocated
261 with xmalloc; instead, they are pointers into debug_line_buffer.
262 Don't try to free them directly. */
263 unsigned int num_file_names
, file_names_size
;
267 unsigned int dir_index
;
268 unsigned int mod_time
;
272 /* The start and end of the statement program following this
273 header. These point into dwarf_line_buffer. */
274 char *statement_program_start
, *statement_program_end
;
277 /* When we construct a partial symbol table entry we only
278 need this much information. */
279 struct partial_die_info
282 unsigned char has_children
;
283 unsigned char is_external
;
284 unsigned char is_declaration
;
285 unsigned char has_type
;
292 struct dwarf_block
*locdesc
;
293 unsigned int language
;
297 /* This data structure holds the information of an abbrev. */
300 unsigned int number
; /* number identifying abbrev */
301 enum dwarf_tag tag
; /* dwarf tag */
302 int has_children
; /* boolean */
303 unsigned int num_attrs
; /* number of attributes */
304 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
305 struct abbrev_info
*next
; /* next in chain */
310 enum dwarf_attribute name
;
311 enum dwarf_form form
;
314 /* This data structure holds a complete die structure. */
317 enum dwarf_tag tag
; /* Tag indicating type of die */
318 unsigned short has_children
; /* Does the die have children */
319 unsigned int abbrev
; /* Abbrev number */
320 unsigned int offset
; /* Offset in .debug_info section */
321 unsigned int num_attrs
; /* Number of attributes */
322 struct attribute
*attrs
; /* An array of attributes */
323 struct die_info
*next_ref
; /* Next die in ref hash table */
324 struct die_info
*next
; /* Next die in linked list */
325 struct type
*type
; /* Cached type information */
328 /* Attributes have a name and a value */
331 enum dwarf_attribute name
;
332 enum dwarf_form form
;
336 struct dwarf_block
*blk
;
344 struct function_range
347 CORE_ADDR lowpc
, highpc
;
349 struct function_range
*next
;
352 static struct function_range
*cu_first_fn
, *cu_last_fn
, *cu_cached_fn
;
354 /* Get at parts of an attribute structure */
356 #define DW_STRING(attr) ((attr)->u.str)
357 #define DW_UNSND(attr) ((attr)->u.unsnd)
358 #define DW_BLOCK(attr) ((attr)->u.blk)
359 #define DW_SND(attr) ((attr)->u.snd)
360 #define DW_ADDR(attr) ((attr)->u.addr)
362 /* Blocks are a bunch of untyped bytes. */
369 #ifndef ATTR_ALLOC_CHUNK
370 #define ATTR_ALLOC_CHUNK 4
373 /* A hash table of die offsets for following references. */
374 #ifndef REF_HASH_SIZE
375 #define REF_HASH_SIZE 1021
378 static struct die_info
*die_ref_table
[REF_HASH_SIZE
];
380 /* Obstack for allocating temporary storage used during symbol reading. */
381 static struct obstack dwarf2_tmp_obstack
;
383 /* Offset to the first byte of the current compilation unit header,
384 for resolving relative reference dies. */
385 static unsigned int cu_header_offset
;
387 /* Allocate fields for structs, unions and enums in this size. */
388 #ifndef DW_FIELD_ALLOC_CHUNK
389 #define DW_FIELD_ALLOC_CHUNK 4
392 /* The language we are debugging. */
393 static enum language cu_language
;
394 static const struct language_defn
*cu_language_defn
;
396 /* Actually data from the sections. */
397 static char *dwarf_info_buffer
;
398 static char *dwarf_abbrev_buffer
;
399 static char *dwarf_line_buffer
;
400 static char *dwarf_str_buffer
;
401 static char *dwarf_macinfo_buffer
;
402 static char *dwarf_ranges_buffer
;
403 static char *dwarf_loc_buffer
;
405 /* A zeroed version of a partial die for initialization purposes. */
406 static struct partial_die_info zeroed_partial_die
;
408 /* The generic symbol table building routines have separate lists for
409 file scope symbols and all all other scopes (local scopes). So
410 we need to select the right one to pass to add_symbol_to_list().
411 We do it by keeping a pointer to the correct list in list_in_scope.
413 FIXME: The original dwarf code just treated the file scope as the first
414 local scope, and all other local scopes as nested local scopes, and worked
415 fine. Check to see if we really need to distinguish these
417 static struct pending
**list_in_scope
= &file_symbols
;
419 /* FIXME: decode_locdesc sets these variables to describe the location
420 to the caller. These ought to be a structure or something. If
421 none of the flags are set, the object lives at the address returned
422 by decode_locdesc. */
424 static int optimized_out
; /* No ops in location in expression,
425 so object was optimized out. */
426 static int isreg
; /* Object lives in register.
427 decode_locdesc's return value is
428 the register number. */
429 static int offreg
; /* Object's address is the sum of the
430 register specified by basereg, plus
431 the offset returned. */
432 static int basereg
; /* See `offreg'. */
433 static int isderef
; /* Value described by flags above is
434 the address of a pointer to the object. */
435 static int islocal
; /* Variable is at the returned offset
436 from the frame start, but there's
437 no identified frame pointer for
438 this function, so we can't say
439 which register it's relative to;
442 /* DW_AT_frame_base values for the current function.
443 frame_base_reg is -1 if DW_AT_frame_base is missing, otherwise it
444 contains the register number for the frame register.
445 frame_base_offset is the offset from the frame register to the
446 virtual stack frame. */
447 static int frame_base_reg
;
448 static CORE_ADDR frame_base_offset
;
450 /* This value is added to each symbol value. FIXME: Generalize to
451 the section_offsets structure used by dbxread (once this is done,
452 pass the appropriate section number to end_symtab). */
453 static CORE_ADDR baseaddr
; /* Add to each symbol value */
455 /* We put a pointer to this structure in the read_symtab_private field
457 The complete dwarf information for an objfile is kept in the
458 psymbol_obstack, so that absolute die references can be handled.
459 Most of the information in this structure is related to an entire
460 object file and could be passed via the sym_private field of the objfile.
461 It is however conceivable that dwarf2 might not be the only type
462 of symbols read from an object file. */
466 /* Pointer to start of dwarf info buffer for the objfile. */
468 char *dwarf_info_buffer
;
470 /* Offset in dwarf_info_buffer for this compilation unit. */
472 unsigned long dwarf_info_offset
;
474 /* Pointer to start of dwarf abbreviation buffer for the objfile. */
476 char *dwarf_abbrev_buffer
;
478 /* Size of dwarf abbreviation section for the objfile. */
480 unsigned int dwarf_abbrev_size
;
482 /* Pointer to start of dwarf line buffer for the objfile. */
484 char *dwarf_line_buffer
;
486 /* Size of dwarf_line_buffer, in bytes. */
488 unsigned int dwarf_line_size
;
490 /* Pointer to start of dwarf string buffer for the objfile. */
492 char *dwarf_str_buffer
;
494 /* Size of dwarf string section for the objfile. */
496 unsigned int dwarf_str_size
;
498 /* Pointer to start of dwarf macro buffer for the objfile. */
500 char *dwarf_macinfo_buffer
;
502 /* Size of dwarf macinfo section for the objfile. */
504 unsigned int dwarf_macinfo_size
;
506 /* Pointer to start of dwarf ranges buffer for the objfile. */
508 char *dwarf_ranges_buffer
;
510 /* Size of dwarf ranges buffer for the objfile. */
512 unsigned int dwarf_ranges_size
;
514 /* Pointer to start of dwarf locations buffer for the objfile. */
516 char *dwarf_loc_buffer
;
518 /* Size of dwarf locations buffer for the objfile. */
520 unsigned int dwarf_loc_size
;
523 #define PST_PRIVATE(p) ((struct dwarf2_pinfo *)(p)->read_symtab_private)
524 #define DWARF_INFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_info_buffer)
525 #define DWARF_INFO_OFFSET(p) (PST_PRIVATE(p)->dwarf_info_offset)
526 #define DWARF_ABBREV_BUFFER(p) (PST_PRIVATE(p)->dwarf_abbrev_buffer)
527 #define DWARF_ABBREV_SIZE(p) (PST_PRIVATE(p)->dwarf_abbrev_size)
528 #define DWARF_LINE_BUFFER(p) (PST_PRIVATE(p)->dwarf_line_buffer)
529 #define DWARF_LINE_SIZE(p) (PST_PRIVATE(p)->dwarf_line_size)
530 #define DWARF_STR_BUFFER(p) (PST_PRIVATE(p)->dwarf_str_buffer)
531 #define DWARF_STR_SIZE(p) (PST_PRIVATE(p)->dwarf_str_size)
532 #define DWARF_MACINFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_macinfo_buffer)
533 #define DWARF_MACINFO_SIZE(p) (PST_PRIVATE(p)->dwarf_macinfo_size)
534 #define DWARF_RANGES_BUFFER(p) (PST_PRIVATE(p)->dwarf_ranges_buffer)
535 #define DWARF_RANGES_SIZE(p) (PST_PRIVATE(p)->dwarf_ranges_size)
536 #define DWARF_LOC_BUFFER(p) (PST_PRIVATE(p)->dwarf_loc_buffer)
537 #define DWARF_LOC_SIZE(p) (PST_PRIVATE(p)->dwarf_loc_size)
539 /* Maintain an array of referenced fundamental types for the current
540 compilation unit being read. For DWARF version 1, we have to construct
541 the fundamental types on the fly, since no information about the
542 fundamental types is supplied. Each such fundamental type is created by
543 calling a language dependent routine to create the type, and then a
544 pointer to that type is then placed in the array at the index specified
545 by it's FT_<TYPENAME> value. The array has a fixed size set by the
546 FT_NUM_MEMBERS compile time constant, which is the number of predefined
547 fundamental types gdb knows how to construct. */
548 static struct type
*ftypes
[FT_NUM_MEMBERS
]; /* Fundamental types */
550 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
551 but this would require a corresponding change in unpack_field_as_long
553 static int bits_per_byte
= 8;
555 /* The routines that read and process dies for a C struct or C++ class
556 pass lists of data member fields and lists of member function fields
557 in an instance of a field_info structure, as defined below. */
560 /* List of data member and baseclasses fields. */
563 struct nextfield
*next
;
570 /* Number of fields. */
573 /* Number of baseclasses. */
576 /* Set if the accesibility of one of the fields is not public. */
577 int non_public_fields
;
579 /* Member function fields array, entries are allocated in the order they
580 are encountered in the object file. */
583 struct nextfnfield
*next
;
584 struct fn_field fnfield
;
588 /* Member function fieldlist array, contains name of possibly overloaded
589 member function, number of overloaded member functions and a pointer
590 to the head of the member function field chain. */
595 struct nextfnfield
*head
;
599 /* Number of entries in the fnfieldlists array. */
603 /* Various complaints about symbol reading that don't abort the process */
606 dwarf2_non_const_array_bound_ignored_complaint (const char *arg1
)
608 complaint (&symfile_complaints
, "non-constant array bounds form '%s' ignored",
613 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
615 complaint (&symfile_complaints
,
616 "statement list doesn't fit in .debug_line section");
620 dwarf2_complex_location_expr_complaint (void)
622 complaint (&symfile_complaints
, "location expression too complex");
626 dwarf2_unsupported_at_frame_base_complaint (const char *arg1
)
628 complaint (&symfile_complaints
,
629 "unsupported DW_AT_frame_base for function '%s'", arg1
);
633 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
636 complaint (&symfile_complaints
,
637 "const value length mismatch for '%s', got %d, expected %d", arg1
,
642 dwarf2_macros_too_long_complaint (void)
644 complaint (&symfile_complaints
,
645 "macro info runs off end of `.debug_macinfo' section");
649 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
651 complaint (&symfile_complaints
,
652 "macro debug info contains a malformed macro definition:\n`%s'",
657 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
659 complaint (&symfile_complaints
,
660 "invalid attribute class or form for '%s' in '%s'", arg1
, arg2
);
663 /* local function prototypes */
665 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
668 static void dwarf2_build_psymtabs_easy (struct objfile
*, int);
671 static void dwarf2_build_psymtabs_hard (struct objfile
*, int);
673 static char *scan_partial_symbols (char *, struct objfile
*,
674 CORE_ADDR
*, CORE_ADDR
*,
675 const struct comp_unit_head
*,
676 const char *namespace);
678 static void add_partial_symbol (struct partial_die_info
*, struct objfile
*,
679 const struct comp_unit_head
*,
680 const char *namespace);
682 static char *add_partial_namespace (struct partial_die_info
*pdi
,
684 struct objfile
*objfile
,
685 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
686 const struct comp_unit_head
*cu_header
,
687 const char *namespace);
689 static char *add_partial_enumeration (struct partial_die_info
*enum_pdi
,
691 struct objfile
*objfile
,
692 const struct comp_unit_head
*cu_header
,
693 const char *namespace);
695 static char *locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
698 const struct comp_unit_head
*cu_header
);
700 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
702 static void psymtab_to_symtab_1 (struct partial_symtab
*);
704 char *dwarf2_read_section (struct objfile
*, file_ptr
, unsigned int,
707 static void dwarf2_read_abbrevs (bfd
*abfd
, struct comp_unit_head
*cu_header
);
709 static void dwarf2_empty_abbrev_table (void *);
711 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
712 const struct comp_unit_head
*cu_header
);
714 static char *read_partial_die (struct partial_die_info
*,
716 const struct comp_unit_head
*);
718 static char *read_full_die (struct die_info
**, bfd
*, char *,
719 const struct comp_unit_head
*);
721 static char *read_attribute (struct attribute
*, struct attr_abbrev
*,
722 bfd
*, char *, const struct comp_unit_head
*);
724 static char *read_attribute_value (struct attribute
*, unsigned,
725 bfd
*, char *, const struct comp_unit_head
*);
727 static unsigned int read_1_byte (bfd
*, char *);
729 static int read_1_signed_byte (bfd
*, char *);
731 static unsigned int read_2_bytes (bfd
*, char *);
733 static unsigned int read_4_bytes (bfd
*, char *);
735 static unsigned long read_8_bytes (bfd
*, char *);
737 static CORE_ADDR
read_address (bfd
*, char *ptr
, const struct comp_unit_head
*,
740 static LONGEST
read_initial_length (bfd
*, char *,
741 struct comp_unit_head
*, int *bytes_read
);
743 static LONGEST
read_offset (bfd
*, char *, const struct comp_unit_head
*,
746 static char *read_n_bytes (bfd
*, char *, unsigned int);
748 static char *read_string (bfd
*, char *, unsigned int *);
750 static char *read_indirect_string (bfd
*, char *, const struct comp_unit_head
*,
753 static unsigned long read_unsigned_leb128 (bfd
*, char *, unsigned int *);
755 static long read_signed_leb128 (bfd
*, char *, unsigned int *);
757 static void set_cu_language (unsigned int);
759 static struct attribute
*dwarf_attr (struct die_info
*, unsigned int);
761 static int die_is_declaration (struct die_info
*);
763 static void free_line_header (struct line_header
*lh
);
765 static struct line_header
*(dwarf_decode_line_header
766 (unsigned int offset
,
768 const struct comp_unit_head
*cu_header
));
770 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
771 const struct comp_unit_head
*);
773 static void dwarf2_start_subfile (char *, char *);
775 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
776 struct objfile
*, const struct comp_unit_head
*);
778 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
779 struct objfile
*, const struct comp_unit_head
*);
781 static void dwarf2_const_value_data (struct attribute
*attr
,
785 static struct type
*die_type (struct die_info
*, struct objfile
*,
786 const struct comp_unit_head
*);
788 static struct type
*die_containing_type (struct die_info
*, struct objfile
*,
789 const struct comp_unit_head
*);
792 static struct type
*type_at_offset (unsigned int, struct objfile
*);
795 static struct type
*tag_type_to_type (struct die_info
*, struct objfile
*,
796 const struct comp_unit_head
*);
798 static void read_type_die (struct die_info
*, struct objfile
*,
799 const struct comp_unit_head
*);
801 static void read_typedef (struct die_info
*, struct objfile
*,
802 const struct comp_unit_head
*);
804 static void read_base_type (struct die_info
*, struct objfile
*);
806 static void read_file_scope (struct die_info
*, struct objfile
*,
807 const struct comp_unit_head
*);
809 static void read_func_scope (struct die_info
*, struct objfile
*,
810 const struct comp_unit_head
*);
812 static void read_lexical_block_scope (struct die_info
*, struct objfile
*,
813 const struct comp_unit_head
*);
815 static int dwarf2_get_pc_bounds (struct die_info
*,
816 CORE_ADDR
*, CORE_ADDR
*, struct objfile
*,
817 const struct comp_unit_head
*);
819 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
820 struct objfile
*, const struct comp_unit_head
*);
822 static void dwarf2_attach_fields_to_type (struct field_info
*,
823 struct type
*, struct objfile
*);
825 static void dwarf2_add_member_fn (struct field_info
*,
826 struct die_info
*, struct type
*,
827 struct objfile
*objfile
,
828 const struct comp_unit_head
*);
830 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
831 struct type
*, struct objfile
*);
833 static void read_structure_scope (struct die_info
*, struct objfile
*,
834 const struct comp_unit_head
*);
836 static void read_common_block (struct die_info
*, struct objfile
*,
837 const struct comp_unit_head
*);
839 static void read_namespace (struct die_info
*die
, struct objfile
*objfile
,
840 const struct comp_unit_head
*cu_header
);
842 static void read_enumeration (struct die_info
*, struct objfile
*,
843 const struct comp_unit_head
*);
845 static struct type
*dwarf_base_type (int, int, struct objfile
*);
847 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct objfile
*,
848 const struct comp_unit_head
*);
850 static void read_array_type (struct die_info
*, struct objfile
*,
851 const struct comp_unit_head
*);
853 static void read_tag_pointer_type (struct die_info
*, struct objfile
*,
854 const struct comp_unit_head
*);
856 static void read_tag_ptr_to_member_type (struct die_info
*, struct objfile
*,
857 const struct comp_unit_head
*);
859 static void read_tag_reference_type (struct die_info
*, struct objfile
*,
860 const struct comp_unit_head
*);
862 static void read_tag_const_type (struct die_info
*, struct objfile
*,
863 const struct comp_unit_head
*);
865 static void read_tag_volatile_type (struct die_info
*, struct objfile
*,
866 const struct comp_unit_head
*);
868 static void read_tag_string_type (struct die_info
*, struct objfile
*);
870 static void read_subroutine_type (struct die_info
*, struct objfile
*,
871 const struct comp_unit_head
*);
873 static struct die_info
*read_comp_unit (char *, bfd
*,
874 const struct comp_unit_head
*);
876 static void free_die_list (struct die_info
*);
878 static struct cleanup
*make_cleanup_free_die_list (struct die_info
*);
880 static void process_die (struct die_info
*, struct objfile
*,
881 const struct comp_unit_head
*);
883 static char *dwarf2_linkage_name (struct die_info
*);
885 static char *dwarf2_name (struct die_info
*die
);
887 static struct die_info
*dwarf2_extension (struct die_info
*die
);
889 static char *dwarf_tag_name (unsigned int);
891 static char *dwarf_attr_name (unsigned int);
893 static char *dwarf_form_name (unsigned int);
895 static char *dwarf_stack_op_name (unsigned int);
897 static char *dwarf_bool_name (unsigned int);
899 static char *dwarf_type_encoding_name (unsigned int);
902 static char *dwarf_cfi_name (unsigned int);
904 struct die_info
*copy_die (struct die_info
*);
907 static struct die_info
*sibling_die (struct die_info
*);
909 static void dump_die (struct die_info
*);
911 static void dump_die_list (struct die_info
*);
913 static void store_in_ref_table (unsigned int, struct die_info
*);
915 static void dwarf2_empty_hash_tables (void);
917 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
919 static struct die_info
*follow_die_ref (unsigned int);
921 static struct type
*dwarf2_fundamental_type (struct objfile
*, int);
923 /* memory allocation interface */
925 static void dwarf2_free_tmp_obstack (void *);
927 static struct dwarf_block
*dwarf_alloc_block (void);
929 static struct abbrev_info
*dwarf_alloc_abbrev (void);
931 static struct die_info
*dwarf_alloc_die (void);
933 static void initialize_cu_func_list (void);
935 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
);
937 static void dwarf_decode_macros (struct line_header
*, unsigned int,
938 char *, bfd
*, const struct comp_unit_head
*,
941 static int attr_form_is_block (struct attribute
*);
944 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
945 const struct comp_unit_head
*,
946 struct objfile
*objfile
);
948 /* Try to locate the sections we need for DWARF 2 debugging
949 information and return true if we have enough to do something. */
952 dwarf2_has_info (bfd
*abfd
)
954 dwarf_info_offset
= 0;
955 dwarf_abbrev_offset
= 0;
956 dwarf_line_offset
= 0;
957 dwarf_str_offset
= 0;
958 dwarf_macinfo_offset
= 0;
959 dwarf_frame_offset
= 0;
960 dwarf_eh_frame_offset
= 0;
961 dwarf_ranges_offset
= 0;
962 dwarf_loc_offset
= 0;
964 bfd_map_over_sections (abfd
, dwarf2_locate_sections
, NULL
);
965 if (dwarf_info_offset
&& dwarf_abbrev_offset
)
975 /* This function is mapped across the sections and remembers the
976 offset and size of each of the debugging sections we are interested
980 dwarf2_locate_sections (bfd
*ignore_abfd
, asection
*sectp
, void *ignore_ptr
)
982 if (STREQ (sectp
->name
, INFO_SECTION
))
984 dwarf_info_offset
= sectp
->filepos
;
985 dwarf_info_size
= bfd_get_section_size_before_reloc (sectp
);
986 dwarf_info_section
= sectp
;
988 else if (STREQ (sectp
->name
, ABBREV_SECTION
))
990 dwarf_abbrev_offset
= sectp
->filepos
;
991 dwarf_abbrev_size
= bfd_get_section_size_before_reloc (sectp
);
992 dwarf_abbrev_section
= sectp
;
994 else if (STREQ (sectp
->name
, LINE_SECTION
))
996 dwarf_line_offset
= sectp
->filepos
;
997 dwarf_line_size
= bfd_get_section_size_before_reloc (sectp
);
998 dwarf_line_section
= sectp
;
1000 else if (STREQ (sectp
->name
, PUBNAMES_SECTION
))
1002 dwarf_pubnames_offset
= sectp
->filepos
;
1003 dwarf_pubnames_size
= bfd_get_section_size_before_reloc (sectp
);
1004 dwarf_pubnames_section
= sectp
;
1006 else if (STREQ (sectp
->name
, ARANGES_SECTION
))
1008 dwarf_aranges_offset
= sectp
->filepos
;
1009 dwarf_aranges_size
= bfd_get_section_size_before_reloc (sectp
);
1010 dwarf_aranges_section
= sectp
;
1012 else if (STREQ (sectp
->name
, LOC_SECTION
))
1014 dwarf_loc_offset
= sectp
->filepos
;
1015 dwarf_loc_size
= bfd_get_section_size_before_reloc (sectp
);
1016 dwarf_loc_section
= sectp
;
1018 else if (STREQ (sectp
->name
, MACINFO_SECTION
))
1020 dwarf_macinfo_offset
= sectp
->filepos
;
1021 dwarf_macinfo_size
= bfd_get_section_size_before_reloc (sectp
);
1022 dwarf_macinfo_section
= sectp
;
1024 else if (STREQ (sectp
->name
, STR_SECTION
))
1026 dwarf_str_offset
= sectp
->filepos
;
1027 dwarf_str_size
= bfd_get_section_size_before_reloc (sectp
);
1028 dwarf_str_section
= sectp
;
1030 else if (STREQ (sectp
->name
, FRAME_SECTION
))
1032 dwarf_frame_offset
= sectp
->filepos
;
1033 dwarf_frame_size
= bfd_get_section_size_before_reloc (sectp
);
1034 dwarf_frame_section
= sectp
;
1036 else if (STREQ (sectp
->name
, EH_FRAME_SECTION
))
1038 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1039 if (aflag
& SEC_HAS_CONTENTS
)
1041 dwarf_eh_frame_offset
= sectp
->filepos
;
1042 dwarf_eh_frame_size
= bfd_get_section_size_before_reloc (sectp
);
1043 dwarf_eh_frame_section
= sectp
;
1046 else if (STREQ (sectp
->name
, RANGES_SECTION
))
1048 dwarf_ranges_offset
= sectp
->filepos
;
1049 dwarf_ranges_size
= bfd_get_section_size_before_reloc (sectp
);
1050 dwarf_ranges_section
= sectp
;
1054 /* Build a partial symbol table. */
1057 dwarf2_build_psymtabs (struct objfile
*objfile
, int mainline
)
1060 /* We definitely need the .debug_info and .debug_abbrev sections */
1062 dwarf_info_buffer
= dwarf2_read_section (objfile
,
1065 dwarf_info_section
);
1066 dwarf_abbrev_buffer
= dwarf2_read_section (objfile
,
1067 dwarf_abbrev_offset
,
1069 dwarf_abbrev_section
);
1071 if (dwarf_line_offset
)
1072 dwarf_line_buffer
= dwarf2_read_section (objfile
,
1075 dwarf_line_section
);
1077 dwarf_line_buffer
= NULL
;
1079 if (dwarf_str_offset
)
1080 dwarf_str_buffer
= dwarf2_read_section (objfile
,
1085 dwarf_str_buffer
= NULL
;
1087 if (dwarf_macinfo_offset
)
1088 dwarf_macinfo_buffer
= dwarf2_read_section (objfile
,
1089 dwarf_macinfo_offset
,
1091 dwarf_macinfo_section
);
1093 dwarf_macinfo_buffer
= NULL
;
1095 if (dwarf_ranges_offset
)
1096 dwarf_ranges_buffer
= dwarf2_read_section (objfile
,
1097 dwarf_ranges_offset
,
1099 dwarf_ranges_section
);
1101 dwarf_ranges_buffer
= NULL
;
1103 if (dwarf_loc_offset
)
1104 dwarf_loc_buffer
= dwarf2_read_section (objfile
,
1109 dwarf_loc_buffer
= NULL
;
1112 || (objfile
->global_psymbols
.size
== 0
1113 && objfile
->static_psymbols
.size
== 0))
1115 init_psymbol_list (objfile
, 1024);
1119 if (dwarf_aranges_offset
&& dwarf_pubnames_offset
)
1121 /* Things are significantly easier if we have .debug_aranges and
1122 .debug_pubnames sections */
1124 dwarf2_build_psymtabs_easy (objfile
, mainline
);
1128 /* only test this case for now */
1130 /* In this case we have to work a bit harder */
1131 dwarf2_build_psymtabs_hard (objfile
, mainline
);
1136 /* Build the partial symbol table from the information in the
1137 .debug_pubnames and .debug_aranges sections. */
1140 dwarf2_build_psymtabs_easy (struct objfile
*objfile
, int mainline
)
1142 bfd
*abfd
= objfile
->obfd
;
1143 char *aranges_buffer
, *pubnames_buffer
;
1144 char *aranges_ptr
, *pubnames_ptr
;
1145 unsigned int entry_length
, version
, info_offset
, info_size
;
1147 pubnames_buffer
= dwarf2_read_section (objfile
,
1148 dwarf_pubnames_offset
,
1149 dwarf_pubnames_size
,
1150 dwarf_pubnames_section
);
1151 pubnames_ptr
= pubnames_buffer
;
1152 while ((pubnames_ptr
- pubnames_buffer
) < dwarf_pubnames_size
)
1154 struct comp_unit_head cu_header
;
1157 entry_length
= read_initial_length (abfd
, pubnames_ptr
, &cu_header
,
1159 pubnames_ptr
+= bytes_read
;
1160 version
= read_1_byte (abfd
, pubnames_ptr
);
1162 info_offset
= read_4_bytes (abfd
, pubnames_ptr
);
1164 info_size
= read_4_bytes (abfd
, pubnames_ptr
);
1168 aranges_buffer
= dwarf2_read_section (objfile
,
1169 dwarf_aranges_offset
,
1171 dwarf_aranges_section
);
1176 /* Read in the comp unit header information from the debug_info at
1180 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1181 char *info_ptr
, bfd
*abfd
)
1185 cu_header
->length
= read_initial_length (abfd
, info_ptr
, cu_header
,
1187 info_ptr
+= bytes_read
;
1188 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1190 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1192 info_ptr
+= bytes_read
;
1193 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1195 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1196 if (signed_addr
< 0)
1197 internal_error (__FILE__
, __LINE__
,
1198 "read_comp_unit_head: dwarf from non elf file");
1199 cu_header
->signed_addr_p
= signed_addr
;
1203 /* Build the partial symbol table by doing a quick pass through the
1204 .debug_info and .debug_abbrev sections. */
1207 dwarf2_build_psymtabs_hard (struct objfile
*objfile
, int mainline
)
1209 /* Instead of reading this into a big buffer, we should probably use
1210 mmap() on architectures that support it. (FIXME) */
1211 bfd
*abfd
= objfile
->obfd
;
1212 char *info_ptr
, *abbrev_ptr
;
1213 char *beg_of_comp_unit
;
1214 struct partial_die_info comp_unit_die
;
1215 struct partial_symtab
*pst
;
1216 struct cleanup
*back_to
;
1217 CORE_ADDR lowpc
, highpc
;
1219 info_ptr
= dwarf_info_buffer
;
1220 abbrev_ptr
= dwarf_abbrev_buffer
;
1222 /* We use dwarf2_tmp_obstack for objects that don't need to survive
1223 the partial symbol scan, like attribute values.
1225 We could reduce our peak memory consumption during partial symbol
1226 table construction by freeing stuff from this obstack more often
1227 --- say, after processing each compilation unit, or each die ---
1228 but it turns out that this saves almost nothing. For an
1229 executable with 11Mb of Dwarf 2 data, I found about 64k allocated
1230 on dwarf2_tmp_obstack. Some investigation showed:
1232 1) 69% of the attributes used forms DW_FORM_addr, DW_FORM_data*,
1233 DW_FORM_flag, DW_FORM_[su]data, and DW_FORM_ref*. These are
1234 all fixed-length values not requiring dynamic allocation.
1236 2) 30% of the attributes used the form DW_FORM_string. For
1237 DW_FORM_string, read_attribute simply hands back a pointer to
1238 the null-terminated string in dwarf_info_buffer, so no dynamic
1239 allocation is needed there either.
1241 3) The remaining 1% of the attributes all used DW_FORM_block1.
1242 75% of those were DW_AT_frame_base location lists for
1243 functions; the rest were DW_AT_location attributes, probably
1244 for the global variables.
1246 Anyway, what this all means is that the memory the dwarf2
1247 reader uses as temporary space reading partial symbols is about
1248 0.5% as much as we use for dwarf_*_buffer. That's noise. */
1250 obstack_init (&dwarf2_tmp_obstack
);
1251 back_to
= make_cleanup (dwarf2_free_tmp_obstack
, NULL
);
1253 /* Since the objects we're extracting from dwarf_info_buffer vary in
1254 length, only the individual functions to extract them (like
1255 read_comp_unit_head and read_partial_die) can really know whether
1256 the buffer is large enough to hold another complete object.
1258 At the moment, they don't actually check that. If
1259 dwarf_info_buffer holds just one extra byte after the last
1260 compilation unit's dies, then read_comp_unit_head will happily
1261 read off the end of the buffer. read_partial_die is similarly
1262 casual. Those functions should be fixed.
1264 For this loop condition, simply checking whether there's any data
1265 left at all should be sufficient. */
1266 while (info_ptr
< dwarf_info_buffer
+ dwarf_info_size
)
1268 struct comp_unit_head cu_header
;
1269 beg_of_comp_unit
= info_ptr
;
1270 info_ptr
= read_comp_unit_head (&cu_header
, info_ptr
, abfd
);
1272 if (cu_header
.version
!= 2)
1274 error ("Dwarf Error: wrong version in compilation unit header (is %d, should be %d) [in module %s]", cu_header
.version
, 2, bfd_get_filename (abfd
));
1277 if (cu_header
.abbrev_offset
>= dwarf_abbrev_size
)
1279 error ("Dwarf Error: bad offset (0x%lx) in compilation unit header (offset 0x%lx + 6) [in module %s]",
1280 (long) cu_header
.abbrev_offset
,
1281 (long) (beg_of_comp_unit
- dwarf_info_buffer
),
1282 bfd_get_filename (abfd
));
1285 if (beg_of_comp_unit
+ cu_header
.length
+ cu_header
.initial_length_size
1286 > dwarf_info_buffer
+ dwarf_info_size
)
1288 error ("Dwarf Error: bad length (0x%lx) in compilation unit header (offset 0x%lx + 0) [in module %s]",
1289 (long) cu_header
.length
,
1290 (long) (beg_of_comp_unit
- dwarf_info_buffer
),
1291 bfd_get_filename (abfd
));
1294 /* Complete the cu_header */
1295 cu_header
.offset
= beg_of_comp_unit
- dwarf_info_buffer
;
1296 cu_header
.first_die_ptr
= info_ptr
;
1297 cu_header
.cu_head_ptr
= beg_of_comp_unit
;
1299 /* Read the abbrevs for this compilation unit into a table */
1300 dwarf2_read_abbrevs (abfd
, &cu_header
);
1301 make_cleanup (dwarf2_empty_abbrev_table
, cu_header
.dwarf2_abbrevs
);
1303 /* Read the compilation unit die */
1304 info_ptr
= read_partial_die (&comp_unit_die
, abfd
, info_ptr
,
1307 /* Set the language we're debugging */
1308 set_cu_language (comp_unit_die
.language
);
1310 /* Allocate a new partial symbol table structure */
1311 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1312 comp_unit_die
.name
? comp_unit_die
.name
: "",
1313 comp_unit_die
.lowpc
,
1314 objfile
->global_psymbols
.next
,
1315 objfile
->static_psymbols
.next
);
1317 pst
->read_symtab_private
= (char *)
1318 obstack_alloc (&objfile
->psymbol_obstack
, sizeof (struct dwarf2_pinfo
));
1319 cu_header_offset
= beg_of_comp_unit
- dwarf_info_buffer
;
1320 DWARF_INFO_BUFFER (pst
) = dwarf_info_buffer
;
1321 DWARF_INFO_OFFSET (pst
) = beg_of_comp_unit
- dwarf_info_buffer
;
1322 DWARF_ABBREV_BUFFER (pst
) = dwarf_abbrev_buffer
;
1323 DWARF_ABBREV_SIZE (pst
) = dwarf_abbrev_size
;
1324 DWARF_LINE_BUFFER (pst
) = dwarf_line_buffer
;
1325 DWARF_LINE_SIZE (pst
) = dwarf_line_size
;
1326 DWARF_STR_BUFFER (pst
) = dwarf_str_buffer
;
1327 DWARF_STR_SIZE (pst
) = dwarf_str_size
;
1328 DWARF_MACINFO_BUFFER (pst
) = dwarf_macinfo_buffer
;
1329 DWARF_MACINFO_SIZE (pst
) = dwarf_macinfo_size
;
1330 DWARF_RANGES_BUFFER (pst
) = dwarf_ranges_buffer
;
1331 DWARF_RANGES_SIZE (pst
) = dwarf_ranges_size
;
1332 DWARF_LOC_BUFFER (pst
) = dwarf_loc_buffer
;
1333 DWARF_LOC_SIZE (pst
) = dwarf_loc_size
;
1334 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1336 /* Store the function that reads in the rest of the symbol table */
1337 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1339 /* Check if comp unit has_children.
1340 If so, read the rest of the partial symbols from this comp unit.
1341 If not, there's no more debug_info for this comp unit. */
1342 if (comp_unit_die
.has_children
)
1344 lowpc
= ((CORE_ADDR
) -1);
1345 highpc
= ((CORE_ADDR
) 0);
1347 info_ptr
= scan_partial_symbols (info_ptr
, objfile
, &lowpc
, &highpc
,
1350 /* If we didn't find a lowpc, set it to highpc to avoid
1351 complaints from `maint check'. */
1352 if (lowpc
== ((CORE_ADDR
) -1))
1355 /* If the compilation unit didn't have an explicit address range,
1356 then use the information extracted from its child dies. */
1357 if (! comp_unit_die
.has_pc_info
)
1359 comp_unit_die
.lowpc
= lowpc
;
1360 comp_unit_die
.highpc
= highpc
;
1363 pst
->textlow
= comp_unit_die
.lowpc
+ baseaddr
;
1364 pst
->texthigh
= comp_unit_die
.highpc
+ baseaddr
;
1366 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
1367 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1368 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
1369 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1370 sort_pst_symbols (pst
);
1372 /* If there is already a psymtab or symtab for a file of this
1373 name, remove it. (If there is a symtab, more drastic things
1374 also happen.) This happens in VxWorks. */
1375 free_named_symtabs (pst
->filename
);
1377 info_ptr
= beg_of_comp_unit
+ cu_header
.length
1378 + cu_header
.initial_length_size
;
1380 do_cleanups (back_to
);
1383 /* Read in all interesting dies to the end of the compilation unit or
1384 to the end of the current namespace. NAMESPACE is NULL if we
1385 haven't yet encountered any DW_TAG_namespace entries; otherwise,
1386 it's the name of the current namespace. In particular, it's the
1387 empty string if we're currently in the global namespace but have
1388 previously encountered a DW_TAG_namespace. */
1391 scan_partial_symbols (char *info_ptr
, struct objfile
*objfile
,
1392 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1393 const struct comp_unit_head
*cu_header
,
1394 const char *namespace)
1396 bfd
*abfd
= objfile
->obfd
;
1397 struct partial_die_info pdi
;
1399 /* Now, march along the PDI's, descending into ones which have
1400 interesting children but skipping the children of the other ones,
1401 until we reach the end of the compilation unit. */
1405 /* This flag tells whether or not info_ptr has gotten updated
1407 int info_ptr_updated
= 0;
1409 info_ptr
= read_partial_die (&pdi
, abfd
, info_ptr
, cu_header
);
1411 /* Anonymous namespaces have no name but have interesting
1412 children, so we need to look at them. Ditto for anonymous
1415 if (pdi
.name
!= NULL
|| pdi
.tag
== DW_TAG_namespace
1416 || pdi
.tag
== DW_TAG_enumeration_type
)
1420 case DW_TAG_subprogram
:
1421 if (pdi
.has_pc_info
)
1423 if (pdi
.lowpc
< *lowpc
)
1427 if (pdi
.highpc
> *highpc
)
1429 *highpc
= pdi
.highpc
;
1431 if (!pdi
.is_declaration
)
1433 add_partial_symbol (&pdi
, objfile
, cu_header
, namespace);
1437 case DW_TAG_variable
:
1438 case DW_TAG_typedef
:
1439 case DW_TAG_union_type
:
1440 case DW_TAG_class_type
:
1441 case DW_TAG_structure_type
:
1442 if (!pdi
.is_declaration
)
1444 add_partial_symbol (&pdi
, objfile
, cu_header
, namespace);
1447 case DW_TAG_enumeration_type
:
1448 if (!pdi
.is_declaration
)
1450 info_ptr
= add_partial_enumeration (&pdi
, info_ptr
,
1453 info_ptr_updated
= 1;
1456 case DW_TAG_base_type
:
1457 /* File scope base type definitions are added to the partial
1459 add_partial_symbol (&pdi
, objfile
, cu_header
, namespace);
1461 case DW_TAG_namespace
:
1462 /* We've hit a DW_TAG_namespace entry, so we know this
1463 file has been compiled using a compiler that
1464 generates them; update NAMESPACE to reflect that. */
1465 if (namespace == NULL
)
1467 info_ptr
= add_partial_namespace (&pdi
, info_ptr
, objfile
,
1468 lowpc
, highpc
, cu_header
,
1470 info_ptr_updated
= 1;
1480 /* If the die has a sibling, skip to the sibling, unless another
1481 function has already updated info_ptr for us. */
1483 /* NOTE: carlton/2003-06-16: This is a bit hackish, but whether
1484 or not we want to update this depends on enough stuff (not
1485 only pdi.tag but also whether or not pdi.name is NULL) that
1486 this seems like the easiest way to handle the issue. */
1488 if (!info_ptr_updated
)
1489 info_ptr
= locate_pdi_sibling (&pdi
, info_ptr
, abfd
, cu_header
);
1496 add_partial_symbol (struct partial_die_info
*pdi
, struct objfile
*objfile
,
1497 const struct comp_unit_head
*cu_header
,
1498 const char *namespace)
1501 const struct partial_symbol
*psym
= NULL
;
1505 case DW_TAG_subprogram
:
1506 if (pdi
->is_external
)
1508 /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
1509 mst_text, objfile); */
1510 psym
= add_psymbol_to_list (pdi
->name
, strlen (pdi
->name
),
1511 VAR_DOMAIN
, LOC_BLOCK
,
1512 &objfile
->global_psymbols
,
1513 0, pdi
->lowpc
+ baseaddr
,
1514 cu_language
, objfile
);
1518 /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr,
1519 mst_file_text, objfile); */
1520 psym
= add_psymbol_to_list (pdi
->name
, strlen (pdi
->name
),
1521 VAR_DOMAIN
, LOC_BLOCK
,
1522 &objfile
->static_psymbols
,
1523 0, pdi
->lowpc
+ baseaddr
,
1524 cu_language
, objfile
);
1527 case DW_TAG_variable
:
1528 if (pdi
->is_external
)
1531 Don't enter into the minimal symbol tables as there is
1532 a minimal symbol table entry from the ELF symbols already.
1533 Enter into partial symbol table if it has a location
1534 descriptor or a type.
1535 If the location descriptor is missing, new_symbol will create
1536 a LOC_UNRESOLVED symbol, the address of the variable will then
1537 be determined from the minimal symbol table whenever the variable
1539 The address for the partial symbol table entry is not
1540 used by GDB, but it comes in handy for debugging partial symbol
1544 addr
= decode_locdesc (pdi
->locdesc
, objfile
, cu_header
);
1545 if (pdi
->locdesc
|| pdi
->has_type
)
1546 psym
= add_psymbol_to_list (pdi
->name
, strlen (pdi
->name
),
1547 VAR_DOMAIN
, LOC_STATIC
,
1548 &objfile
->global_psymbols
,
1550 cu_language
, objfile
);
1554 /* Static Variable. Skip symbols without location descriptors. */
1555 if (pdi
->locdesc
== NULL
)
1557 addr
= decode_locdesc (pdi
->locdesc
, objfile
, cu_header
);
1558 /*prim_record_minimal_symbol (pdi->name, addr + baseaddr,
1559 mst_file_data, objfile); */
1560 psym
= add_psymbol_to_list (pdi
->name
, strlen (pdi
->name
),
1561 VAR_DOMAIN
, LOC_STATIC
,
1562 &objfile
->static_psymbols
,
1564 cu_language
, objfile
);
1567 case DW_TAG_typedef
:
1568 case DW_TAG_base_type
:
1569 add_psymbol_to_list (pdi
->name
, strlen (pdi
->name
),
1570 VAR_DOMAIN
, LOC_TYPEDEF
,
1571 &objfile
->static_psymbols
,
1572 0, (CORE_ADDR
) 0, cu_language
, objfile
);
1574 case DW_TAG_class_type
:
1575 case DW_TAG_structure_type
:
1576 case DW_TAG_union_type
:
1577 case DW_TAG_enumeration_type
:
1578 /* Skip aggregate types without children, these are external
1580 if (pdi
->has_children
== 0)
1582 add_psymbol_to_list (pdi
->name
, strlen (pdi
->name
),
1583 STRUCT_DOMAIN
, LOC_TYPEDEF
,
1584 &objfile
->static_psymbols
,
1585 0, (CORE_ADDR
) 0, cu_language
, objfile
);
1587 if (cu_language
== language_cplus
)
1589 /* For C++, these implicitly act as typedefs as well. */
1590 add_psymbol_to_list (pdi
->name
, strlen (pdi
->name
),
1591 VAR_DOMAIN
, LOC_TYPEDEF
,
1592 &objfile
->static_psymbols
,
1593 0, (CORE_ADDR
) 0, cu_language
, objfile
);
1596 case DW_TAG_enumerator
:
1597 add_psymbol_to_list (pdi
->name
, strlen (pdi
->name
),
1598 VAR_DOMAIN
, LOC_CONST
,
1599 &objfile
->static_psymbols
,
1600 0, (CORE_ADDR
) 0, cu_language
, objfile
);
1606 /* Check to see if we should scan the name for possible namespace
1607 info. Only do this if this is C++, if we don't have namespace
1608 debugging info in the file, if the psym is of an appropriate type
1609 (otherwise we'll have psym == NULL), and if we actually had a
1610 mangled name to begin with. */
1612 if (cu_language
== language_cplus
1613 && namespace == NULL
1615 && SYMBOL_CPLUS_DEMANGLED_NAME (psym
) != NULL
)
1616 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym
),
1620 /* Read a partial die corresponding to a namespace; also, add a symbol
1621 corresponding to that namespace to the symbol table. NAMESPACE is
1622 the name of the enclosing namespace. */
1625 add_partial_namespace (struct partial_die_info
*pdi
, char *info_ptr
,
1626 struct objfile
*objfile
,
1627 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1628 const struct comp_unit_head
*cu_header
,
1629 const char *namespace)
1631 /* Calculate the full name of the namespace that we just entered. */
1633 const char *new_name
= pdi
->name
;
1636 if (new_name
== NULL
)
1637 new_name
= "(anonymous namespace)";
1638 full_name
= alloca (strlen (namespace) + 2 + strlen (new_name
) + 1);
1639 strcpy (full_name
, namespace);
1640 if (*namespace != '\0')
1641 strcat (full_name
, "::");
1642 strcat (full_name
, new_name
);
1644 /* FIXME: carlton/2003-06-27: Once we build qualified names for more
1645 symbols than just namespaces, we should replace this by a call to
1646 add_partial_symbol. */
1648 add_psymbol_to_list (full_name
, strlen (full_name
),
1649 VAR_DOMAIN
, LOC_TYPEDEF
,
1650 &objfile
->global_psymbols
,
1651 0, 0, cu_language
, objfile
);
1653 /* Now scan partial symbols in that namespace. */
1655 if (pdi
->has_children
)
1656 info_ptr
= scan_partial_symbols (info_ptr
, objfile
,
1658 cu_header
, full_name
);
1663 /* Read a partial die corresponding to an enumeration type. */
1666 add_partial_enumeration (struct partial_die_info
*enum_pdi
, char *info_ptr
,
1667 struct objfile
*objfile
,
1668 const struct comp_unit_head
*cu_header
,
1669 const char *namespace)
1671 bfd
*abfd
= objfile
->obfd
;
1672 struct partial_die_info pdi
;
1674 if (enum_pdi
->name
!= NULL
)
1675 add_partial_symbol (enum_pdi
, objfile
, cu_header
, namespace);
1679 info_ptr
= read_partial_die (&pdi
, abfd
, info_ptr
, cu_header
);
1682 if (pdi
.tag
!= DW_TAG_enumerator
|| pdi
.name
== NULL
)
1683 complaint (&symfile_complaints
, "malformed enumerator DIE ignored");
1685 add_partial_symbol (&pdi
, objfile
, cu_header
, namespace);
1691 /* Locate ORIG_PDI's sibling; INFO_PTR should point to the next DIE
1695 locate_pdi_sibling (struct partial_die_info
*orig_pdi
, char *info_ptr
,
1696 bfd
*abfd
, const struct comp_unit_head
*cu_header
)
1698 /* Do we know the sibling already? */
1700 if (orig_pdi
->sibling
)
1701 return orig_pdi
->sibling
;
1703 /* Are there any children to deal with? */
1705 if (!orig_pdi
->has_children
)
1708 /* Okay, we don't know the sibling, but we have children that we
1709 want to skip. So read children until we run into one without a
1710 tag; return whatever follows it. */
1714 struct partial_die_info pdi
;
1716 info_ptr
= read_partial_die (&pdi
, abfd
, info_ptr
, cu_header
);
1721 info_ptr
= locate_pdi_sibling (&pdi
, info_ptr
, abfd
, cu_header
);
1725 /* Expand this partial symbol table into a full symbol table. */
1728 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
1730 /* FIXME: This is barely more than a stub. */
1735 warning ("bug: psymtab for %s is already read in.", pst
->filename
);
1741 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
1742 gdb_flush (gdb_stdout
);
1745 psymtab_to_symtab_1 (pst
);
1747 /* Finish up the debug error message. */
1749 printf_filtered ("done.\n");
1755 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
1757 struct objfile
*objfile
= pst
->objfile
;
1758 bfd
*abfd
= objfile
->obfd
;
1759 struct comp_unit_head cu_header
;
1760 struct die_info
*dies
;
1761 unsigned long offset
;
1762 CORE_ADDR lowpc
, highpc
;
1763 struct die_info
*child_die
;
1765 struct symtab
*symtab
;
1766 struct cleanup
*back_to
;
1767 struct attribute
*attr
;
1769 /* Set local variables from the partial symbol table info. */
1770 offset
= DWARF_INFO_OFFSET (pst
);
1771 dwarf_info_buffer
= DWARF_INFO_BUFFER (pst
);
1772 dwarf_abbrev_buffer
= DWARF_ABBREV_BUFFER (pst
);
1773 dwarf_abbrev_size
= DWARF_ABBREV_SIZE (pst
);
1774 dwarf_line_buffer
= DWARF_LINE_BUFFER (pst
);
1775 dwarf_line_size
= DWARF_LINE_SIZE (pst
);
1776 dwarf_str_buffer
= DWARF_STR_BUFFER (pst
);
1777 dwarf_str_size
= DWARF_STR_SIZE (pst
);
1778 dwarf_macinfo_buffer
= DWARF_MACINFO_BUFFER (pst
);
1779 dwarf_macinfo_size
= DWARF_MACINFO_SIZE (pst
);
1780 dwarf_ranges_buffer
= DWARF_RANGES_BUFFER (pst
);
1781 dwarf_ranges_size
= DWARF_RANGES_SIZE (pst
);
1782 dwarf_loc_buffer
= DWARF_LOC_BUFFER (pst
);
1783 dwarf_loc_size
= DWARF_LOC_SIZE (pst
);
1784 baseaddr
= ANOFFSET (pst
->section_offsets
, SECT_OFF_TEXT (objfile
));
1785 cu_header_offset
= offset
;
1786 info_ptr
= dwarf_info_buffer
+ offset
;
1788 obstack_init (&dwarf2_tmp_obstack
);
1789 back_to
= make_cleanup (dwarf2_free_tmp_obstack
, NULL
);
1792 make_cleanup (really_free_pendings
, NULL
);
1794 /* read in the comp_unit header */
1795 info_ptr
= read_comp_unit_head (&cu_header
, info_ptr
, abfd
);
1797 /* Read the abbrevs for this compilation unit */
1798 dwarf2_read_abbrevs (abfd
, &cu_header
);
1799 make_cleanup (dwarf2_empty_abbrev_table
, cu_header
.dwarf2_abbrevs
);
1801 dies
= read_comp_unit (info_ptr
, abfd
, &cu_header
);
1803 make_cleanup_free_die_list (dies
);
1805 /* Find the base address of the compilation unit for range lists and
1806 location lists. It will normally be specified by DW_AT_low_pc.
1807 In DWARF-3 draft 4, the base address could be overridden by
1808 DW_AT_entry_pc. It's been removed, but GCC still uses this for
1809 compilation units with discontinuous ranges. */
1811 cu_header
.base_known
= 0;
1812 cu_header
.base_address
= 0;
1814 attr
= dwarf_attr (dies
, DW_AT_entry_pc
);
1817 cu_header
.base_address
= DW_ADDR (attr
);
1818 cu_header
.base_known
= 1;
1822 attr
= dwarf_attr (dies
, DW_AT_low_pc
);
1825 cu_header
.base_address
= DW_ADDR (attr
);
1826 cu_header
.base_known
= 1;
1830 /* Do line number decoding in read_file_scope () */
1831 process_die (dies
, objfile
, &cu_header
);
1833 if (!dwarf2_get_pc_bounds (dies
, &lowpc
, &highpc
, objfile
, &cu_header
))
1835 /* Some compilers don't define a DW_AT_high_pc attribute for
1836 the compilation unit. If the DW_AT_high_pc is missing,
1837 synthesize it, by scanning the DIE's below the compilation unit. */
1839 if (dies
->has_children
)
1841 child_die
= dies
->next
;
1842 while (child_die
&& child_die
->tag
)
1844 if (child_die
->tag
== DW_TAG_subprogram
)
1846 CORE_ADDR low
, high
;
1848 if (dwarf2_get_pc_bounds (child_die
, &low
, &high
,
1849 objfile
, &cu_header
))
1851 highpc
= max (highpc
, high
);
1854 child_die
= sibling_die (child_die
);
1858 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
1860 /* Set symtab language to language from DW_AT_language.
1861 If the compilation is from a C file generated by language preprocessors,
1862 do not set the language if it was already deduced by start_subfile. */
1864 && !(cu_language
== language_c
&& symtab
->language
!= language_c
))
1866 symtab
->language
= cu_language
;
1868 pst
->symtab
= symtab
;
1871 do_cleanups (back_to
);
1874 /* Process a die and its children. */
1877 process_die (struct die_info
*die
, struct objfile
*objfile
,
1878 const struct comp_unit_head
*cu_header
)
1882 case DW_TAG_padding
:
1884 case DW_TAG_compile_unit
:
1885 read_file_scope (die
, objfile
, cu_header
);
1887 case DW_TAG_subprogram
:
1888 read_subroutine_type (die
, objfile
, cu_header
);
1889 read_func_scope (die
, objfile
, cu_header
);
1891 case DW_TAG_inlined_subroutine
:
1892 /* FIXME: These are ignored for now.
1893 They could be used to set breakpoints on all inlined instances
1894 of a function and make GDB `next' properly over inlined functions. */
1896 case DW_TAG_lexical_block
:
1897 case DW_TAG_try_block
:
1898 case DW_TAG_catch_block
:
1899 read_lexical_block_scope (die
, objfile
, cu_header
);
1901 case DW_TAG_class_type
:
1902 case DW_TAG_structure_type
:
1903 case DW_TAG_union_type
:
1904 read_structure_scope (die
, objfile
, cu_header
);
1906 case DW_TAG_enumeration_type
:
1907 read_enumeration (die
, objfile
, cu_header
);
1909 case DW_TAG_subroutine_type
:
1910 read_subroutine_type (die
, objfile
, cu_header
);
1912 case DW_TAG_array_type
:
1913 read_array_type (die
, objfile
, cu_header
);
1915 case DW_TAG_pointer_type
:
1916 read_tag_pointer_type (die
, objfile
, cu_header
);
1918 case DW_TAG_ptr_to_member_type
:
1919 read_tag_ptr_to_member_type (die
, objfile
, cu_header
);
1921 case DW_TAG_reference_type
:
1922 read_tag_reference_type (die
, objfile
, cu_header
);
1924 case DW_TAG_string_type
:
1925 read_tag_string_type (die
, objfile
);
1927 case DW_TAG_base_type
:
1928 read_base_type (die
, objfile
);
1929 if (dwarf_attr (die
, DW_AT_name
))
1931 /* Add a typedef symbol for the base type definition. */
1932 new_symbol (die
, die
->type
, objfile
, cu_header
);
1935 case DW_TAG_common_block
:
1936 read_common_block (die
, objfile
, cu_header
);
1938 case DW_TAG_common_inclusion
:
1940 case DW_TAG_namespace
:
1941 if (!processing_has_namespace_info
)
1943 processing_has_namespace_info
= 1;
1944 processing_current_namespace
= "";
1946 read_namespace (die
, objfile
, cu_header
);
1948 case DW_TAG_imported_declaration
:
1949 case DW_TAG_imported_module
:
1950 /* FIXME: carlton/2002-10-16: Eventually, we should use the
1951 information contained in these. DW_TAG_imported_declaration
1952 dies shouldn't have children; DW_TAG_imported_module dies
1953 shouldn't in the C++ case, but conceivably could in the
1954 Fortran case, so we'll have to replace this gdb_assert if
1955 Fortran compilers start generating that info. */
1956 if (!processing_has_namespace_info
)
1958 processing_has_namespace_info
= 1;
1959 processing_current_namespace
= "";
1961 gdb_assert (!die
->has_children
);
1964 new_symbol (die
, NULL
, objfile
, cu_header
);
1970 initialize_cu_func_list (void)
1972 cu_first_fn
= cu_last_fn
= cu_cached_fn
= NULL
;
1976 read_file_scope (struct die_info
*die
, struct objfile
*objfile
,
1977 const struct comp_unit_head
*cu_header
)
1979 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
1980 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
1981 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
1982 struct attribute
*attr
;
1983 char *name
= "<unknown>";
1984 char *comp_dir
= NULL
;
1985 struct die_info
*child_die
;
1986 bfd
*abfd
= objfile
->obfd
;
1987 struct line_header
*line_header
= 0;
1989 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, objfile
, cu_header
))
1991 if (die
->has_children
)
1993 child_die
= die
->next
;
1994 while (child_die
&& child_die
->tag
)
1996 if (child_die
->tag
== DW_TAG_subprogram
)
1998 CORE_ADDR low
, high
;
2000 if (dwarf2_get_pc_bounds (child_die
, &low
, &high
,
2001 objfile
, cu_header
))
2003 lowpc
= min (lowpc
, low
);
2004 highpc
= max (highpc
, high
);
2007 child_die
= sibling_die (child_die
);
2012 /* If we didn't find a lowpc, set it to highpc to avoid complaints
2013 from finish_block. */
2014 if (lowpc
== ((CORE_ADDR
) -1))
2019 attr
= dwarf_attr (die
, DW_AT_name
);
2022 name
= DW_STRING (attr
);
2024 attr
= dwarf_attr (die
, DW_AT_comp_dir
);
2027 comp_dir
= DW_STRING (attr
);
2030 /* Irix 6.2 native cc prepends <machine>.: to the compilation
2031 directory, get rid of it. */
2032 char *cp
= strchr (comp_dir
, ':');
2034 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
2039 if (objfile
->ei
.entry_point
>= lowpc
&&
2040 objfile
->ei
.entry_point
< highpc
)
2042 objfile
->ei
.deprecated_entry_file_lowpc
= lowpc
;
2043 objfile
->ei
.deprecated_entry_file_highpc
= highpc
;
2046 attr
= dwarf_attr (die
, DW_AT_language
);
2049 set_cu_language (DW_UNSND (attr
));
2052 /* We assume that we're processing GCC output. */
2053 processing_gcc_compilation
= 2;
2055 /* FIXME:Do something here. */
2056 if (dip
->at_producer
!= NULL
)
2058 handle_producer (dip
->at_producer
);
2062 /* The compilation unit may be in a different language or objfile,
2063 zero out all remembered fundamental types. */
2064 memset (ftypes
, 0, FT_NUM_MEMBERS
* sizeof (struct type
*));
2066 start_symtab (name
, comp_dir
, lowpc
);
2067 record_debugformat ("DWARF 2");
2069 initialize_cu_func_list ();
2071 /* Process all dies in compilation unit. */
2072 if (die
->has_children
)
2074 child_die
= die
->next
;
2075 while (child_die
&& child_die
->tag
)
2077 process_die (child_die
, objfile
, cu_header
);
2078 child_die
= sibling_die (child_die
);
2082 /* Decode line number information if present. */
2083 attr
= dwarf_attr (die
, DW_AT_stmt_list
);
2086 unsigned int line_offset
= DW_UNSND (attr
);
2087 line_header
= dwarf_decode_line_header (line_offset
,
2091 make_cleanup ((make_cleanup_ftype
*) free_line_header
,
2092 (void *) line_header
);
2093 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu_header
);
2097 /* Decode macro information, if present. Dwarf 2 macro information
2098 refers to information in the line number info statement program
2099 header, so we can only read it if we've read the header
2101 attr
= dwarf_attr (die
, DW_AT_macro_info
);
2102 if (attr
&& line_header
)
2104 unsigned int macro_offset
= DW_UNSND (attr
);
2105 dwarf_decode_macros (line_header
, macro_offset
,
2106 comp_dir
, abfd
, cu_header
, objfile
);
2108 do_cleanups (back_to
);
2112 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
)
2114 struct function_range
*thisfn
;
2116 thisfn
= (struct function_range
*)
2117 obstack_alloc (&dwarf2_tmp_obstack
, sizeof (struct function_range
));
2118 thisfn
->name
= name
;
2119 thisfn
->lowpc
= lowpc
;
2120 thisfn
->highpc
= highpc
;
2121 thisfn
->seen_line
= 0;
2122 thisfn
->next
= NULL
;
2124 if (cu_last_fn
== NULL
)
2125 cu_first_fn
= thisfn
;
2127 cu_last_fn
->next
= thisfn
;
2129 cu_last_fn
= thisfn
;
2133 read_func_scope (struct die_info
*die
, struct objfile
*objfile
,
2134 const struct comp_unit_head
*cu_header
)
2136 struct context_stack
*new;
2139 struct die_info
*child_die
;
2140 struct attribute
*attr
;
2143 name
= dwarf2_linkage_name (die
);
2145 /* Ignore functions with missing or empty names and functions with
2146 missing or invalid low and high pc attributes. */
2147 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, objfile
, cu_header
))
2153 /* Record the function range for dwarf_decode_lines. */
2154 add_to_cu_func_list (name
, lowpc
, highpc
);
2156 if (objfile
->ei
.entry_point
>= lowpc
&&
2157 objfile
->ei
.entry_point
< highpc
)
2159 objfile
->ei
.entry_func_lowpc
= lowpc
;
2160 objfile
->ei
.entry_func_highpc
= highpc
;
2163 /* Decode DW_AT_frame_base location descriptor if present, keep result
2164 for DW_OP_fbreg operands in decode_locdesc. */
2165 frame_base_reg
= -1;
2166 frame_base_offset
= 0;
2167 attr
= dwarf_attr (die
, DW_AT_frame_base
);
2172 /* Support the .debug_loc offsets */
2173 if (attr_form_is_block (attr
))
2175 addr
= decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
);
2177 else if (attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
2179 dwarf2_complex_location_expr_complaint ();
2184 dwarf2_invalid_attrib_class_complaint ("DW_AT_frame_base", name
);
2189 dwarf2_unsupported_at_frame_base_complaint (name
);
2191 frame_base_reg
= addr
;
2194 frame_base_reg
= basereg
;
2195 frame_base_offset
= addr
;
2198 dwarf2_unsupported_at_frame_base_complaint (name
);
2201 new = push_context (0, lowpc
);
2202 new->name
= new_symbol (die
, die
->type
, objfile
, cu_header
);
2204 /* If there was a location expression for DW_AT_frame_base above,
2205 record it. We still need to decode it above because not all
2206 symbols use location expressions exclusively. */
2208 dwarf2_symbol_mark_computed (attr
, new->name
, cu_header
, objfile
);
2210 list_in_scope
= &local_symbols
;
2212 if (die
->has_children
)
2214 child_die
= die
->next
;
2215 while (child_die
&& child_die
->tag
)
2217 process_die (child_die
, objfile
, cu_header
);
2218 child_die
= sibling_die (child_die
);
2222 new = pop_context ();
2223 /* Make a block for the local symbols within. */
2224 finish_block (new->name
, &local_symbols
, new->old_blocks
,
2225 lowpc
, highpc
, objfile
);
2227 /* In C++, we can have functions nested inside functions (e.g., when
2228 a function declares a class that has methods). This means that
2229 when we finish processing a function scope, we may need to go
2230 back to building a containing block's symbol lists. */
2231 local_symbols
= new->locals
;
2232 param_symbols
= new->params
;
2234 /* If we've finished processing a top-level function, subsequent
2235 symbols go in the file symbol list. */
2236 if (outermost_context_p ())
2237 list_in_scope
= &file_symbols
;
2240 /* Process all the DIES contained within a lexical block scope. Start
2241 a new scope, process the dies, and then close the scope. */
2244 read_lexical_block_scope (struct die_info
*die
, struct objfile
*objfile
,
2245 const struct comp_unit_head
*cu_header
)
2247 struct context_stack
*new;
2248 CORE_ADDR lowpc
, highpc
;
2249 struct die_info
*child_die
;
2251 /* Ignore blocks with missing or invalid low and high pc attributes. */
2252 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
2253 as multiple lexical blocks? Handling children in a sane way would
2254 be nasty. Might be easier to properly extend generic blocks to
2256 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, objfile
, cu_header
))
2261 push_context (0, lowpc
);
2262 if (die
->has_children
)
2264 child_die
= die
->next
;
2265 while (child_die
&& child_die
->tag
)
2267 process_die (child_die
, objfile
, cu_header
);
2268 child_die
= sibling_die (child_die
);
2271 new = pop_context ();
2273 if (local_symbols
!= NULL
)
2275 finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
2278 local_symbols
= new->locals
;
2281 /* Get low and high pc attributes from a die. Return 1 if the attributes
2282 are present and valid, otherwise, return 0. Return -1 if the range is
2283 discontinuous, i.e. derived from DW_AT_ranges information. */
2285 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
2286 CORE_ADDR
*highpc
, struct objfile
*objfile
,
2287 const struct comp_unit_head
*cu_header
)
2289 struct attribute
*attr
;
2290 bfd
*obfd
= objfile
->obfd
;
2295 attr
= dwarf_attr (die
, DW_AT_high_pc
);
2298 high
= DW_ADDR (attr
);
2299 attr
= dwarf_attr (die
, DW_AT_low_pc
);
2301 low
= DW_ADDR (attr
);
2303 /* Found high w/o low attribute. */
2306 /* Found consecutive range of addresses. */
2311 attr
= dwarf_attr (die
, DW_AT_ranges
);
2314 unsigned int addr_size
= cu_header
->addr_size
;
2315 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
2316 /* Value of the DW_AT_ranges attribute is the offset in the
2317 .debug_ranges section. */
2318 unsigned int offset
= DW_UNSND (attr
);
2319 /* Base address selection entry. */
2328 found_base
= cu_header
->base_known
;
2329 base
= cu_header
->base_address
;
2331 if (offset
>= dwarf_ranges_size
)
2333 complaint (&symfile_complaints
,
2334 "Offset %d out of bounds for DW_AT_ranges attribute",
2338 buffer
= dwarf_ranges_buffer
+ offset
;
2340 /* Read in the largest possible address. */
2341 marker
= read_address (obfd
, buffer
, cu_header
, &dummy
);
2342 if ((marker
& mask
) == mask
)
2344 /* If we found the largest possible address, then
2345 read the base address. */
2346 base
= read_address (obfd
, buffer
+ addr_size
,
2348 buffer
+= 2 * addr_size
;
2349 offset
+= 2 * addr_size
;
2357 CORE_ADDR range_beginning
, range_end
;
2359 range_beginning
= read_address (obfd
, buffer
,
2361 buffer
+= addr_size
;
2362 range_end
= read_address (obfd
, buffer
, cu_header
, &dummy
);
2363 buffer
+= addr_size
;
2364 offset
+= 2 * addr_size
;
2366 /* An end of list marker is a pair of zero addresses. */
2367 if (range_beginning
== 0 && range_end
== 0)
2368 /* Found the end of list entry. */
2371 /* Each base address selection entry is a pair of 2 values.
2372 The first is the largest possible address, the second is
2373 the base address. Check for a base address here. */
2374 if ((range_beginning
& mask
) == mask
)
2376 /* If we found the largest possible address, then
2377 read the base address. */
2378 base
= read_address (obfd
, buffer
+ addr_size
,
2386 /* We have no valid base address for the ranges
2388 complaint (&symfile_complaints
,
2389 "Invalid .debug_ranges data (no base address)");
2393 range_beginning
+= base
;
2396 /* FIXME: This is recording everything as a low-high
2397 segment of consecutive addresses. We should have a
2398 data structure for discontiguous block ranges
2402 low
= range_beginning
;
2408 if (range_beginning
< low
)
2409 low
= range_beginning
;
2410 if (range_end
> high
)
2416 /* If the first entry is an end-of-list marker, the range
2417 describes an empty scope, i.e. no instructions. */
2427 /* When using the GNU linker, .gnu.linkonce. sections are used to
2428 eliminate duplicate copies of functions and vtables and such.
2429 The linker will arbitrarily choose one and discard the others.
2430 The AT_*_pc values for such functions refer to local labels in
2431 these sections. If the section from that file was discarded, the
2432 labels are not in the output, so the relocs get a value of 0.
2433 If this is a discarded function, mark the pc bounds as invalid,
2434 so that GDB will ignore it. */
2435 if (low
== 0 && (bfd_get_file_flags (obfd
) & HAS_RELOC
) == 0)
2443 /* Add an aggregate field to the field list. */
2446 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
2447 struct objfile
*objfile
,
2448 const struct comp_unit_head
*cu_header
)
2450 struct nextfield
*new_field
;
2451 struct attribute
*attr
;
2453 char *fieldname
= "";
2455 /* Allocate a new field list entry and link it in. */
2456 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
2457 make_cleanup (xfree
, new_field
);
2458 memset (new_field
, 0, sizeof (struct nextfield
));
2459 new_field
->next
= fip
->fields
;
2460 fip
->fields
= new_field
;
2463 /* Handle accessibility and virtuality of field.
2464 The default accessibility for members is public, the default
2465 accessibility for inheritance is private. */
2466 if (die
->tag
!= DW_TAG_inheritance
)
2467 new_field
->accessibility
= DW_ACCESS_public
;
2469 new_field
->accessibility
= DW_ACCESS_private
;
2470 new_field
->virtuality
= DW_VIRTUALITY_none
;
2472 attr
= dwarf_attr (die
, DW_AT_accessibility
);
2474 new_field
->accessibility
= DW_UNSND (attr
);
2475 if (new_field
->accessibility
!= DW_ACCESS_public
)
2476 fip
->non_public_fields
= 1;
2477 attr
= dwarf_attr (die
, DW_AT_virtuality
);
2479 new_field
->virtuality
= DW_UNSND (attr
);
2481 fp
= &new_field
->field
;
2483 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
))
2485 /* Data member other than a C++ static data member. */
2487 /* Get type of field. */
2488 fp
->type
= die_type (die
, objfile
, cu_header
);
2490 FIELD_STATIC_KIND (*fp
) = 0;
2492 /* Get bit size of field (zero if none). */
2493 attr
= dwarf_attr (die
, DW_AT_bit_size
);
2496 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
2500 FIELD_BITSIZE (*fp
) = 0;
2503 /* Get bit offset of field. */
2504 attr
= dwarf_attr (die
, DW_AT_data_member_location
);
2507 FIELD_BITPOS (*fp
) =
2508 decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
) * bits_per_byte
;
2511 FIELD_BITPOS (*fp
) = 0;
2512 attr
= dwarf_attr (die
, DW_AT_bit_offset
);
2515 if (BITS_BIG_ENDIAN
)
2517 /* For big endian bits, the DW_AT_bit_offset gives the
2518 additional bit offset from the MSB of the containing
2519 anonymous object to the MSB of the field. We don't
2520 have to do anything special since we don't need to
2521 know the size of the anonymous object. */
2522 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
2526 /* For little endian bits, compute the bit offset to the
2527 MSB of the anonymous object, subtract off the number of
2528 bits from the MSB of the field to the MSB of the
2529 object, and then subtract off the number of bits of
2530 the field itself. The result is the bit offset of
2531 the LSB of the field. */
2533 int bit_offset
= DW_UNSND (attr
);
2535 attr
= dwarf_attr (die
, DW_AT_byte_size
);
2538 /* The size of the anonymous object containing
2539 the bit field is explicit, so use the
2540 indicated size (in bytes). */
2541 anonymous_size
= DW_UNSND (attr
);
2545 /* The size of the anonymous object containing
2546 the bit field must be inferred from the type
2547 attribute of the data member containing the
2549 anonymous_size
= TYPE_LENGTH (fp
->type
);
2551 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
2552 - bit_offset
- FIELD_BITSIZE (*fp
);
2556 /* Get name of field. */
2557 attr
= dwarf_attr (die
, DW_AT_name
);
2558 if (attr
&& DW_STRING (attr
))
2559 fieldname
= DW_STRING (attr
);
2560 fp
->name
= obsavestring (fieldname
, strlen (fieldname
),
2561 &objfile
->type_obstack
);
2563 /* Change accessibility for artificial fields (e.g. virtual table
2564 pointer or virtual base class pointer) to private. */
2565 if (dwarf_attr (die
, DW_AT_artificial
))
2567 new_field
->accessibility
= DW_ACCESS_private
;
2568 fip
->non_public_fields
= 1;
2571 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
2573 /* C++ static member. */
2575 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
2576 is a declaration, but all versions of G++ as of this writing
2577 (so through at least 3.2.1) incorrectly generate
2578 DW_TAG_variable tags. */
2582 /* Get name of field. */
2583 attr
= dwarf_attr (die
, DW_AT_name
);
2584 if (attr
&& DW_STRING (attr
))
2585 fieldname
= DW_STRING (attr
);
2589 /* Get physical name. */
2590 physname
= dwarf2_linkage_name (die
);
2592 SET_FIELD_PHYSNAME (*fp
, obsavestring (physname
, strlen (physname
),
2593 &objfile
->type_obstack
));
2594 FIELD_TYPE (*fp
) = die_type (die
, objfile
, cu_header
);
2595 FIELD_NAME (*fp
) = obsavestring (fieldname
, strlen (fieldname
),
2596 &objfile
->type_obstack
);
2598 else if (die
->tag
== DW_TAG_inheritance
)
2600 /* C++ base class field. */
2601 attr
= dwarf_attr (die
, DW_AT_data_member_location
);
2603 FIELD_BITPOS (*fp
) = (decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
)
2605 FIELD_BITSIZE (*fp
) = 0;
2606 FIELD_STATIC_KIND (*fp
) = 0;
2607 FIELD_TYPE (*fp
) = die_type (die
, objfile
, cu_header
);
2608 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
2609 fip
->nbaseclasses
++;
2613 /* Create the vector of fields, and attach it to the type. */
2616 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
2617 struct objfile
*objfile
)
2619 int nfields
= fip
->nfields
;
2621 /* Record the field count, allocate space for the array of fields,
2622 and create blank accessibility bitfields if necessary. */
2623 TYPE_NFIELDS (type
) = nfields
;
2624 TYPE_FIELDS (type
) = (struct field
*)
2625 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
2626 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
2628 if (fip
->non_public_fields
)
2630 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2632 TYPE_FIELD_PRIVATE_BITS (type
) =
2633 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
2634 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
2636 TYPE_FIELD_PROTECTED_BITS (type
) =
2637 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
2638 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
2640 TYPE_FIELD_IGNORE_BITS (type
) =
2641 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
2642 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
2645 /* If the type has baseclasses, allocate and clear a bit vector for
2646 TYPE_FIELD_VIRTUAL_BITS. */
2647 if (fip
->nbaseclasses
)
2649 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
2652 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2653 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
2654 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
2655 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
2656 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
2659 /* Copy the saved-up fields into the field vector. Start from the head
2660 of the list, adding to the tail of the field array, so that they end
2661 up in the same order in the array in which they were added to the list. */
2662 while (nfields
-- > 0)
2664 TYPE_FIELD (type
, nfields
) = fip
->fields
->field
;
2665 switch (fip
->fields
->accessibility
)
2667 case DW_ACCESS_private
:
2668 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
2671 case DW_ACCESS_protected
:
2672 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
2675 case DW_ACCESS_public
:
2679 /* Unknown accessibility. Complain and treat it as public. */
2681 complaint (&symfile_complaints
, "unsupported accessibility %d",
2682 fip
->fields
->accessibility
);
2686 if (nfields
< fip
->nbaseclasses
)
2688 switch (fip
->fields
->virtuality
)
2690 case DW_VIRTUALITY_virtual
:
2691 case DW_VIRTUALITY_pure_virtual
:
2692 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
2696 fip
->fields
= fip
->fields
->next
;
2700 /* Add a member function to the proper fieldlist. */
2703 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
2704 struct type
*type
, struct objfile
*objfile
,
2705 const struct comp_unit_head
*cu_header
)
2707 struct attribute
*attr
;
2708 struct fnfieldlist
*flp
;
2710 struct fn_field
*fnp
;
2713 struct nextfnfield
*new_fnfield
;
2715 /* Get name of member function. */
2716 attr
= dwarf_attr (die
, DW_AT_name
);
2717 if (attr
&& DW_STRING (attr
))
2718 fieldname
= DW_STRING (attr
);
2722 /* Get the mangled name. */
2723 physname
= dwarf2_linkage_name (die
);
2725 /* Look up member function name in fieldlist. */
2726 for (i
= 0; i
< fip
->nfnfields
; i
++)
2728 if (STREQ (fip
->fnfieldlists
[i
].name
, fieldname
))
2732 /* Create new list element if necessary. */
2733 if (i
< fip
->nfnfields
)
2734 flp
= &fip
->fnfieldlists
[i
];
2737 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
2739 fip
->fnfieldlists
= (struct fnfieldlist
*)
2740 xrealloc (fip
->fnfieldlists
,
2741 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
2742 * sizeof (struct fnfieldlist
));
2743 if (fip
->nfnfields
== 0)
2744 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
2746 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
2747 flp
->name
= fieldname
;
2753 /* Create a new member function field and chain it to the field list
2755 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
2756 make_cleanup (xfree
, new_fnfield
);
2757 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
2758 new_fnfield
->next
= flp
->head
;
2759 flp
->head
= new_fnfield
;
2762 /* Fill in the member function field info. */
2763 fnp
= &new_fnfield
->fnfield
;
2764 fnp
->physname
= obsavestring (physname
, strlen (physname
),
2765 &objfile
->type_obstack
);
2766 fnp
->type
= alloc_type (objfile
);
2767 if (die
->type
&& TYPE_CODE (die
->type
) == TYPE_CODE_FUNC
)
2769 struct type
*return_type
= TYPE_TARGET_TYPE (die
->type
);
2770 int nparams
= TYPE_NFIELDS (die
->type
);
2772 /* TYPE is the domain of this method, and DIE->TYPE is the type
2773 of the method itself (TYPE_CODE_METHOD). */
2774 smash_to_method_type (fnp
->type
, type
,
2775 TYPE_TARGET_TYPE (die
->type
),
2776 TYPE_FIELDS (die
->type
),
2777 TYPE_NFIELDS (die
->type
),
2778 TYPE_VARARGS (die
->type
));
2780 /* Handle static member functions.
2781 Dwarf2 has no clean way to discern C++ static and non-static
2782 member functions. G++ helps GDB by marking the first
2783 parameter for non-static member functions (which is the
2784 this pointer) as artificial. We obtain this information
2785 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
2786 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (die
->type
, 0) == 0)
2787 fnp
->voffset
= VOFFSET_STATIC
;
2790 complaint (&symfile_complaints
, "member function type missing for '%s'",
2793 /* Get fcontext from DW_AT_containing_type if present. */
2794 if (dwarf_attr (die
, DW_AT_containing_type
) != NULL
)
2795 fnp
->fcontext
= die_containing_type (die
, objfile
, cu_header
);
2797 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
2798 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
2800 /* Get accessibility. */
2801 attr
= dwarf_attr (die
, DW_AT_accessibility
);
2804 switch (DW_UNSND (attr
))
2806 case DW_ACCESS_private
:
2807 fnp
->is_private
= 1;
2809 case DW_ACCESS_protected
:
2810 fnp
->is_protected
= 1;
2815 /* Check for artificial methods. */
2816 attr
= dwarf_attr (die
, DW_AT_artificial
);
2817 if (attr
&& DW_UNSND (attr
) != 0)
2818 fnp
->is_artificial
= 1;
2820 /* Get index in virtual function table if it is a virtual member function. */
2821 attr
= dwarf_attr (die
, DW_AT_vtable_elem_location
);
2824 /* Support the .debug_loc offsets */
2825 if (attr_form_is_block (attr
))
2827 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
) + 2;
2829 else if (attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
2831 dwarf2_complex_location_expr_complaint ();
2835 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
2841 /* Create the vector of member function fields, and attach it to the type. */
2844 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
2845 struct objfile
*objfile
)
2847 struct fnfieldlist
*flp
;
2848 int total_length
= 0;
2851 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2852 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2853 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
2855 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
2857 struct nextfnfield
*nfp
= flp
->head
;
2858 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
2861 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
2862 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
2863 fn_flp
->fn_fields
= (struct fn_field
*)
2864 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
2865 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
2866 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
2868 total_length
+= flp
->length
;
2871 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
2872 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
2875 /* Called when we find the DIE that starts a structure or union scope
2876 (definition) to process all dies that define the members of the
2879 NOTE: we need to call struct_type regardless of whether or not the
2880 DIE has an at_name attribute, since it might be an anonymous
2881 structure or union. This gets the type entered into our set of
2884 However, if the structure is incomplete (an opaque struct/union)
2885 then suppress creating a symbol table entry for it since gdb only
2886 wants to find the one with the complete definition. Note that if
2887 it is complete, we just call new_symbol, which does it's own
2888 checking about whether the struct/union is anonymous or not (and
2889 suppresses creating a symbol table entry itself). */
2892 read_structure_scope (struct die_info
*die
, struct objfile
*objfile
,
2893 const struct comp_unit_head
*cu_header
)
2896 struct attribute
*attr
;
2898 type
= alloc_type (objfile
);
2900 INIT_CPLUS_SPECIFIC (type
);
2901 attr
= dwarf_attr (die
, DW_AT_name
);
2902 if (attr
&& DW_STRING (attr
))
2904 TYPE_TAG_NAME (type
) = obsavestring (DW_STRING (attr
),
2905 strlen (DW_STRING (attr
)),
2906 &objfile
->type_obstack
);
2909 if (die
->tag
== DW_TAG_structure_type
)
2911 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
2913 else if (die
->tag
== DW_TAG_union_type
)
2915 TYPE_CODE (type
) = TYPE_CODE_UNION
;
2919 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
2921 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
2924 attr
= dwarf_attr (die
, DW_AT_byte_size
);
2927 TYPE_LENGTH (type
) = DW_UNSND (attr
);
2931 TYPE_LENGTH (type
) = 0;
2934 /* We need to add the type field to the die immediately so we don't
2935 infinitely recurse when dealing with pointers to the structure
2936 type within the structure itself. */
2939 if (die
->has_children
&& ! die_is_declaration (die
))
2941 struct field_info fi
;
2942 struct die_info
*child_die
;
2943 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
2945 memset (&fi
, 0, sizeof (struct field_info
));
2947 child_die
= die
->next
;
2949 while (child_die
&& child_die
->tag
)
2951 if (child_die
->tag
== DW_TAG_member
2952 || child_die
->tag
== DW_TAG_variable
)
2954 /* NOTE: carlton/2002-11-05: A C++ static data member
2955 should be a DW_TAG_member that is a declaration, but
2956 all versions of G++ as of this writing (so through at
2957 least 3.2.1) incorrectly generate DW_TAG_variable
2958 tags for them instead. */
2959 dwarf2_add_field (&fi
, child_die
, objfile
, cu_header
);
2961 else if (child_die
->tag
== DW_TAG_subprogram
)
2963 /* C++ member function. */
2964 process_die (child_die
, objfile
, cu_header
);
2965 dwarf2_add_member_fn (&fi
, child_die
, type
, objfile
, cu_header
);
2967 else if (child_die
->tag
== DW_TAG_inheritance
)
2969 /* C++ base class field. */
2970 dwarf2_add_field (&fi
, child_die
, objfile
, cu_header
);
2974 process_die (child_die
, objfile
, cu_header
);
2976 child_die
= sibling_die (child_die
);
2979 /* Attach fields and member functions to the type. */
2981 dwarf2_attach_fields_to_type (&fi
, type
, objfile
);
2984 dwarf2_attach_fn_fields_to_type (&fi
, type
, objfile
);
2986 /* Get the type which refers to the base class (possibly this
2987 class itself) which contains the vtable pointer for the current
2988 class from the DW_AT_containing_type attribute. */
2990 if (dwarf_attr (die
, DW_AT_containing_type
) != NULL
)
2992 struct type
*t
= die_containing_type (die
, objfile
, cu_header
);
2994 TYPE_VPTR_BASETYPE (type
) = t
;
2997 static const char vptr_name
[] =
2998 {'_', 'v', 'p', 't', 'r', '\0'};
3001 /* Our own class provides vtbl ptr. */
3002 for (i
= TYPE_NFIELDS (t
) - 1;
3003 i
>= TYPE_N_BASECLASSES (t
);
3006 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
3008 if (STREQN (fieldname
, vptr_name
, strlen (vptr_name
) - 1)
3009 && is_cplus_marker (fieldname
[strlen (vptr_name
)]))
3011 TYPE_VPTR_FIELDNO (type
) = i
;
3016 /* Complain if virtual function table field not found. */
3017 if (i
< TYPE_N_BASECLASSES (t
))
3018 complaint (&symfile_complaints
,
3019 "virtual function table pointer not found when defining class '%s'",
3020 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
3025 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
3030 new_symbol (die
, type
, objfile
, cu_header
);
3032 do_cleanups (back_to
);
3036 /* No children, must be stub. */
3037 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
3041 /* Given a pointer to a die which begins an enumeration, process all
3042 the dies that define the members of the enumeration.
3044 This will be much nicer in draft 6 of the DWARF spec when our
3045 members will be dies instead squished into the DW_AT_element_list
3048 NOTE: We reverse the order of the element list. */
3051 read_enumeration (struct die_info
*die
, struct objfile
*objfile
,
3052 const struct comp_unit_head
*cu_header
)
3054 struct die_info
*child_die
;
3056 struct field
*fields
;
3057 struct attribute
*attr
;
3060 int unsigned_enum
= 1;
3062 type
= alloc_type (objfile
);
3064 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
3065 attr
= dwarf_attr (die
, DW_AT_name
);
3066 if (attr
&& DW_STRING (attr
))
3068 TYPE_TAG_NAME (type
) = obsavestring (DW_STRING (attr
),
3069 strlen (DW_STRING (attr
)),
3070 &objfile
->type_obstack
);
3073 attr
= dwarf_attr (die
, DW_AT_byte_size
);
3076 TYPE_LENGTH (type
) = DW_UNSND (attr
);
3080 TYPE_LENGTH (type
) = 0;
3085 if (die
->has_children
)
3087 child_die
= die
->next
;
3088 while (child_die
&& child_die
->tag
)
3090 if (child_die
->tag
!= DW_TAG_enumerator
)
3092 process_die (child_die
, objfile
, cu_header
);
3096 attr
= dwarf_attr (child_die
, DW_AT_name
);
3099 sym
= new_symbol (child_die
, type
, objfile
, cu_header
);
3100 if (SYMBOL_VALUE (sym
) < 0)
3103 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
3105 fields
= (struct field
*)
3107 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
3108 * sizeof (struct field
));
3111 FIELD_NAME (fields
[num_fields
]) = DEPRECATED_SYMBOL_NAME (sym
);
3112 FIELD_TYPE (fields
[num_fields
]) = NULL
;
3113 FIELD_BITPOS (fields
[num_fields
]) = SYMBOL_VALUE (sym
);
3114 FIELD_BITSIZE (fields
[num_fields
]) = 0;
3115 FIELD_STATIC_KIND (fields
[num_fields
]) = 0;
3121 child_die
= sibling_die (child_die
);
3126 TYPE_NFIELDS (type
) = num_fields
;
3127 TYPE_FIELDS (type
) = (struct field
*)
3128 TYPE_ALLOC (type
, sizeof (struct field
) * num_fields
);
3129 memcpy (TYPE_FIELDS (type
), fields
,
3130 sizeof (struct field
) * num_fields
);
3134 TYPE_FLAGS (type
) |= TYPE_FLAG_UNSIGNED
;
3137 new_symbol (die
, type
, objfile
, cu_header
);
3140 /* Extract all information from a DW_TAG_array_type DIE and put it in
3141 the DIE's type field. For now, this only handles one dimensional
3145 read_array_type (struct die_info
*die
, struct objfile
*objfile
,
3146 const struct comp_unit_head
*cu_header
)
3148 struct die_info
*child_die
;
3149 struct type
*type
= NULL
;
3150 struct type
*element_type
, *range_type
, *index_type
;
3151 struct type
**range_types
= NULL
;
3152 struct attribute
*attr
;
3154 struct cleanup
*back_to
;
3156 /* Return if we've already decoded this type. */
3162 element_type
= die_type (die
, objfile
, cu_header
);
3164 /* Irix 6.2 native cc creates array types without children for
3165 arrays with unspecified length. */
3166 if (die
->has_children
== 0)
3168 index_type
= dwarf2_fundamental_type (objfile
, FT_INTEGER
);
3169 range_type
= create_range_type (NULL
, index_type
, 0, -1);
3170 die
->type
= create_array_type (NULL
, element_type
, range_type
);
3174 back_to
= make_cleanup (null_cleanup
, NULL
);
3175 child_die
= die
->next
;
3176 while (child_die
&& child_die
->tag
)
3178 if (child_die
->tag
== DW_TAG_subrange_type
)
3180 unsigned int low
, high
;
3182 /* Default bounds to an array with unspecified length. */
3185 if (cu_language
== language_fortran
)
3187 /* FORTRAN implies a lower bound of 1, if not given. */
3191 index_type
= die_type (child_die
, objfile
, cu_header
);
3192 attr
= dwarf_attr (child_die
, DW_AT_lower_bound
);
3195 if (attr
->form
== DW_FORM_sdata
)
3197 low
= DW_SND (attr
);
3199 else if (attr
->form
== DW_FORM_udata
3200 || attr
->form
== DW_FORM_data1
3201 || attr
->form
== DW_FORM_data2
3202 || attr
->form
== DW_FORM_data4
3203 || attr
->form
== DW_FORM_data8
)
3205 low
= DW_UNSND (attr
);
3209 dwarf2_non_const_array_bound_ignored_complaint
3210 (dwarf_form_name (attr
->form
));
3212 die
->type
= lookup_pointer_type (element_type
);
3219 attr
= dwarf_attr (child_die
, DW_AT_upper_bound
);
3222 if (attr
->form
== DW_FORM_sdata
)
3224 high
= DW_SND (attr
);
3226 else if (attr
->form
== DW_FORM_udata
3227 || attr
->form
== DW_FORM_data1
3228 || attr
->form
== DW_FORM_data2
3229 || attr
->form
== DW_FORM_data4
3230 || attr
->form
== DW_FORM_data8
)
3232 high
= DW_UNSND (attr
);
3234 else if (attr
->form
== DW_FORM_block1
)
3236 /* GCC encodes arrays with unspecified or dynamic length
3237 with a DW_FORM_block1 attribute.
3238 FIXME: GDB does not yet know how to handle dynamic
3239 arrays properly, treat them as arrays with unspecified
3245 dwarf2_non_const_array_bound_ignored_complaint
3246 (dwarf_form_name (attr
->form
));
3248 die
->type
= lookup_pointer_type (element_type
);
3256 /* Create a range type and save it for array type creation. */
3257 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
3259 range_types
= (struct type
**)
3260 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
3261 * sizeof (struct type
*));
3263 make_cleanup (free_current_contents
, &range_types
);
3265 range_types
[ndim
++] = create_range_type (NULL
, index_type
, low
, high
);
3267 child_die
= sibling_die (child_die
);
3270 /* Dwarf2 dimensions are output from left to right, create the
3271 necessary array types in backwards order. */
3272 type
= element_type
;
3274 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
3276 /* Understand Dwarf2 support for vector types (like they occur on
3277 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
3278 array type. This is not part of the Dwarf2/3 standard yet, but a
3279 custom vendor extension. The main difference between a regular
3280 array and the vector variant is that vectors are passed by value
3282 attr
= dwarf_attr (die
, DW_AT_GNU_vector
);
3284 TYPE_FLAGS (type
) |= TYPE_FLAG_VECTOR
;
3286 do_cleanups (back_to
);
3288 /* Install the type in the die. */
3292 /* First cut: install each common block member as a global variable. */
3295 read_common_block (struct die_info
*die
, struct objfile
*objfile
,
3296 const struct comp_unit_head
*cu_header
)
3298 struct die_info
*child_die
;
3299 struct attribute
*attr
;
3301 CORE_ADDR base
= (CORE_ADDR
) 0;
3303 attr
= dwarf_attr (die
, DW_AT_location
);
3306 /* Support the .debug_loc offsets */
3307 if (attr_form_is_block (attr
))
3309 base
= decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
);
3311 else if (attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
3313 dwarf2_complex_location_expr_complaint ();
3317 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
3318 "common block member");
3321 if (die
->has_children
)
3323 child_die
= die
->next
;
3324 while (child_die
&& child_die
->tag
)
3326 sym
= new_symbol (child_die
, NULL
, objfile
, cu_header
);
3327 attr
= dwarf_attr (child_die
, DW_AT_data_member_location
);
3330 SYMBOL_VALUE_ADDRESS (sym
) =
3331 base
+ decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
);
3332 add_symbol_to_list (sym
, &global_symbols
);
3334 child_die
= sibling_die (child_die
);
3339 /* Read a C++ namespace. */
3342 read_namespace (struct die_info
*die
, struct objfile
*objfile
,
3343 const struct comp_unit_head
*cu_header
)
3345 const char *previous_namespace
= processing_current_namespace
;
3346 const char *name
= NULL
;
3348 struct die_info
*current_die
;
3350 /* Loop through the extensions until we find a name. */
3352 for (current_die
= die
;
3353 current_die
!= NULL
;
3354 current_die
= dwarf2_extension (die
))
3356 name
= dwarf2_name (current_die
);
3361 /* Is it an anonymous namespace? */
3363 is_anonymous
= (name
== NULL
);
3365 name
= "(anonymous namespace)";
3367 /* Now build the name of the current namespace. */
3369 if (previous_namespace
[0] == '\0')
3371 processing_current_namespace
= name
;
3375 /* We need temp_name around because processing_current_namespace
3376 is a const char *. */
3377 char *temp_name
= alloca (strlen (previous_namespace
)
3378 + 2 + strlen(name
) + 1);
3379 strcpy (temp_name
, previous_namespace
);
3380 strcat (temp_name
, "::");
3381 strcat (temp_name
, name
);
3383 processing_current_namespace
= temp_name
;
3386 /* Add a symbol associated to this if we haven't seen the namespace
3387 before. Also, add a using directive if it's an anonymous
3390 if (dwarf2_extension (die
) == NULL
)
3394 /* FIXME: carlton/2003-06-27: Once GDB is more const-correct,
3395 this cast will hopefully become unnecessary. */
3396 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0,
3397 (char *) processing_current_namespace
,
3399 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
3401 new_symbol (die
, type
, objfile
, cu_header
);
3404 cp_add_using_directive (processing_current_namespace
,
3405 strlen (previous_namespace
),
3406 strlen (processing_current_namespace
));
3409 if (die
->has_children
)
3411 struct die_info
*child_die
= die
->next
;
3413 while (child_die
&& child_die
->tag
)
3415 process_die (child_die
, objfile
, cu_header
);
3416 child_die
= sibling_die (child_die
);
3420 processing_current_namespace
= previous_namespace
;
3423 /* Extract all information from a DW_TAG_pointer_type DIE and add to
3424 the user defined type vector. */
3427 read_tag_pointer_type (struct die_info
*die
, struct objfile
*objfile
,
3428 const struct comp_unit_head
*cu_header
)
3431 struct attribute
*attr_byte_size
;
3432 struct attribute
*attr_address_class
;
3433 int byte_size
, addr_class
;
3440 type
= lookup_pointer_type (die_type (die
, objfile
, cu_header
));
3442 attr_byte_size
= dwarf_attr (die
, DW_AT_byte_size
);
3444 byte_size
= DW_UNSND (attr_byte_size
);
3446 byte_size
= cu_header
->addr_size
;
3448 attr_address_class
= dwarf_attr (die
, DW_AT_address_class
);
3449 if (attr_address_class
)
3450 addr_class
= DW_UNSND (attr_address_class
);
3452 addr_class
= DW_ADDR_none
;
3454 /* If the pointer size or address class is different than the
3455 default, create a type variant marked as such and set the
3456 length accordingly. */
3457 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
3459 if (ADDRESS_CLASS_TYPE_FLAGS_P ())
3463 type_flags
= ADDRESS_CLASS_TYPE_FLAGS (byte_size
, addr_class
);
3464 gdb_assert ((type_flags
& ~TYPE_FLAG_ADDRESS_CLASS_ALL
) == 0);
3465 type
= make_type_with_address_space (type
, type_flags
);
3467 else if (TYPE_LENGTH (type
) != byte_size
)
3469 complaint (&symfile_complaints
, "invalid pointer size %d", byte_size
);
3472 /* Should we also complain about unhandled address classes? */
3476 TYPE_LENGTH (type
) = byte_size
;
3480 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
3481 the user defined type vector. */
3484 read_tag_ptr_to_member_type (struct die_info
*die
, struct objfile
*objfile
,
3485 const struct comp_unit_head
*cu_header
)
3488 struct type
*to_type
;
3489 struct type
*domain
;
3496 type
= alloc_type (objfile
);
3497 to_type
= die_type (die
, objfile
, cu_header
);
3498 domain
= die_containing_type (die
, objfile
, cu_header
);
3499 smash_to_member_type (type
, domain
, to_type
);
3504 /* Extract all information from a DW_TAG_reference_type DIE and add to
3505 the user defined type vector. */
3508 read_tag_reference_type (struct die_info
*die
, struct objfile
*objfile
,
3509 const struct comp_unit_head
*cu_header
)
3512 struct attribute
*attr
;
3519 type
= lookup_reference_type (die_type (die
, objfile
, cu_header
));
3520 attr
= dwarf_attr (die
, DW_AT_byte_size
);
3523 TYPE_LENGTH (type
) = DW_UNSND (attr
);
3527 TYPE_LENGTH (type
) = cu_header
->addr_size
;
3533 read_tag_const_type (struct die_info
*die
, struct objfile
*objfile
,
3534 const struct comp_unit_head
*cu_header
)
3536 struct type
*base_type
;
3543 base_type
= die_type (die
, objfile
, cu_header
);
3544 die
->type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
3548 read_tag_volatile_type (struct die_info
*die
, struct objfile
*objfile
,
3549 const struct comp_unit_head
*cu_header
)
3551 struct type
*base_type
;
3558 base_type
= die_type (die
, objfile
, cu_header
);
3559 die
->type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
3562 /* Extract all information from a DW_TAG_string_type DIE and add to
3563 the user defined type vector. It isn't really a user defined type,
3564 but it behaves like one, with other DIE's using an AT_user_def_type
3565 attribute to reference it. */
3568 read_tag_string_type (struct die_info
*die
, struct objfile
*objfile
)
3570 struct type
*type
, *range_type
, *index_type
, *char_type
;
3571 struct attribute
*attr
;
3572 unsigned int length
;
3579 attr
= dwarf_attr (die
, DW_AT_string_length
);
3582 length
= DW_UNSND (attr
);
3586 /* check for the DW_AT_byte_size attribute */
3587 attr
= dwarf_attr (die
, DW_AT_byte_size
);
3590 length
= DW_UNSND (attr
);
3597 index_type
= dwarf2_fundamental_type (objfile
, FT_INTEGER
);
3598 range_type
= create_range_type (NULL
, index_type
, 1, length
);
3599 if (cu_language
== language_fortran
)
3601 /* Need to create a unique string type for bounds
3603 type
= create_string_type (0, range_type
);
3607 char_type
= dwarf2_fundamental_type (objfile
, FT_CHAR
);
3608 type
= create_string_type (char_type
, range_type
);
3613 /* Handle DIES due to C code like:
3617 int (*funcp)(int a, long l);
3621 ('funcp' generates a DW_TAG_subroutine_type DIE)
3625 read_subroutine_type (struct die_info
*die
, struct objfile
*objfile
,
3626 const struct comp_unit_head
*cu_header
)
3628 struct type
*type
; /* Type that this function returns */
3629 struct type
*ftype
; /* Function that returns above type */
3630 struct attribute
*attr
;
3632 /* Decode the type that this subroutine returns */
3637 type
= die_type (die
, objfile
, cu_header
);
3638 ftype
= lookup_function_type (type
);
3640 /* All functions in C++ have prototypes. */
3641 attr
= dwarf_attr (die
, DW_AT_prototyped
);
3642 if ((attr
&& (DW_UNSND (attr
) != 0))
3643 || cu_language
== language_cplus
)
3644 TYPE_FLAGS (ftype
) |= TYPE_FLAG_PROTOTYPED
;
3646 if (die
->has_children
)
3648 struct die_info
*child_die
;
3652 /* Count the number of parameters.
3653 FIXME: GDB currently ignores vararg functions, but knows about
3654 vararg member functions. */
3655 child_die
= die
->next
;
3656 while (child_die
&& child_die
->tag
)
3658 if (child_die
->tag
== DW_TAG_formal_parameter
)
3660 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
3661 TYPE_FLAGS (ftype
) |= TYPE_FLAG_VARARGS
;
3662 child_die
= sibling_die (child_die
);
3665 /* Allocate storage for parameters and fill them in. */
3666 TYPE_NFIELDS (ftype
) = nparams
;
3667 TYPE_FIELDS (ftype
) = (struct field
*)
3668 TYPE_ALLOC (ftype
, nparams
* sizeof (struct field
));
3670 child_die
= die
->next
;
3671 while (child_die
&& child_die
->tag
)
3673 if (child_die
->tag
== DW_TAG_formal_parameter
)
3675 /* Dwarf2 has no clean way to discern C++ static and non-static
3676 member functions. G++ helps GDB by marking the first
3677 parameter for non-static member functions (which is the
3678 this pointer) as artificial. We pass this information
3679 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
3680 attr
= dwarf_attr (child_die
, DW_AT_artificial
);
3682 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
3684 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
3685 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, objfile
,
3689 child_die
= sibling_die (child_die
);
3697 read_typedef (struct die_info
*die
, struct objfile
*objfile
,
3698 const struct comp_unit_head
*cu_header
)
3700 struct attribute
*attr
;
3705 attr
= dwarf_attr (die
, DW_AT_name
);
3706 if (attr
&& DW_STRING (attr
))
3708 name
= DW_STRING (attr
);
3710 die
->type
= init_type (TYPE_CODE_TYPEDEF
, 0, TYPE_FLAG_TARGET_STUB
, name
, objfile
);
3711 TYPE_TARGET_TYPE (die
->type
) = die_type (die
, objfile
, cu_header
);
3715 /* Find a representation of a given base type and install
3716 it in the TYPE field of the die. */
3719 read_base_type (struct die_info
*die
, struct objfile
*objfile
)
3722 struct attribute
*attr
;
3723 int encoding
= 0, size
= 0;
3725 /* If we've already decoded this die, this is a no-op. */
3731 attr
= dwarf_attr (die
, DW_AT_encoding
);
3734 encoding
= DW_UNSND (attr
);
3736 attr
= dwarf_attr (die
, DW_AT_byte_size
);
3739 size
= DW_UNSND (attr
);
3741 attr
= dwarf_attr (die
, DW_AT_name
);
3742 if (attr
&& DW_STRING (attr
))
3744 enum type_code code
= TYPE_CODE_INT
;
3749 case DW_ATE_address
:
3750 /* Turn DW_ATE_address into a void * pointer. */
3751 code
= TYPE_CODE_PTR
;
3752 type_flags
|= TYPE_FLAG_UNSIGNED
;
3754 case DW_ATE_boolean
:
3755 code
= TYPE_CODE_BOOL
;
3756 type_flags
|= TYPE_FLAG_UNSIGNED
;
3758 case DW_ATE_complex_float
:
3759 code
= TYPE_CODE_COMPLEX
;
3762 code
= TYPE_CODE_FLT
;
3765 case DW_ATE_signed_char
:
3767 case DW_ATE_unsigned
:
3768 case DW_ATE_unsigned_char
:
3769 type_flags
|= TYPE_FLAG_UNSIGNED
;
3772 complaint (&symfile_complaints
, "unsupported DW_AT_encoding: '%s'",
3773 dwarf_type_encoding_name (encoding
));
3776 type
= init_type (code
, size
, type_flags
, DW_STRING (attr
), objfile
);
3777 if (encoding
== DW_ATE_address
)
3778 TYPE_TARGET_TYPE (type
) = dwarf2_fundamental_type (objfile
, FT_VOID
);
3779 else if (encoding
== DW_ATE_complex_float
)
3782 TYPE_TARGET_TYPE (type
)
3783 = dwarf2_fundamental_type (objfile
, FT_EXT_PREC_FLOAT
);
3784 else if (size
== 16)
3785 TYPE_TARGET_TYPE (type
)
3786 = dwarf2_fundamental_type (objfile
, FT_DBL_PREC_FLOAT
);
3788 TYPE_TARGET_TYPE (type
)
3789 = dwarf2_fundamental_type (objfile
, FT_FLOAT
);
3794 type
= dwarf_base_type (encoding
, size
, objfile
);
3799 /* Read a whole compilation unit into a linked list of dies. */
3801 static struct die_info
*
3802 read_comp_unit (char *info_ptr
, bfd
*abfd
,
3803 const struct comp_unit_head
*cu_header
)
3805 struct die_info
*first_die
, *last_die
, *die
;
3809 /* Reset die reference table; we are
3810 building new ones now. */
3811 dwarf2_empty_hash_tables ();
3815 first_die
= last_die
= NULL
;
3818 cur_ptr
= read_full_die (&die
, abfd
, cur_ptr
, cu_header
);
3819 if (die
->has_children
)
3830 /* Enter die in reference hash table */
3831 store_in_ref_table (die
->offset
, die
);
3835 first_die
= last_die
= die
;
3839 last_die
->next
= die
;
3843 while (nesting_level
> 0);
3847 /* Free a linked list of dies. */
3850 free_die_list (struct die_info
*dies
)
3852 struct die_info
*die
, *next
;
3865 do_free_die_list_cleanup (void *dies
)
3867 free_die_list (dies
);
3870 static struct cleanup
*
3871 make_cleanup_free_die_list (struct die_info
*dies
)
3873 return make_cleanup (do_free_die_list_cleanup
, dies
);
3877 /* Read the contents of the section at OFFSET and of size SIZE from the
3878 object file specified by OBJFILE into the psymbol_obstack and return it. */
3881 dwarf2_read_section (struct objfile
*objfile
, file_ptr offset
,
3882 unsigned int size
, asection
*sectp
)
3884 bfd
*abfd
= objfile
->obfd
;
3890 buf
= (char *) obstack_alloc (&objfile
->psymbol_obstack
, size
);
3892 = (char *) symfile_relocate_debug_section (abfd
, sectp
, (bfd_byte
*) buf
);
3896 if ((bfd_seek (abfd
, offset
, SEEK_SET
) != 0) ||
3897 (bfd_bread (buf
, size
, abfd
) != size
))
3900 error ("Dwarf Error: Can't read DWARF data from '%s'",
3901 bfd_get_filename (abfd
));
3906 /* In DWARF version 2, the description of the debugging information is
3907 stored in a separate .debug_abbrev section. Before we read any
3908 dies from a section we read in all abbreviations and install them
3912 dwarf2_read_abbrevs (bfd
*abfd
, struct comp_unit_head
*cu_header
)
3915 struct abbrev_info
*cur_abbrev
;
3916 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
3917 unsigned int abbrev_form
, hash_number
;
3919 /* Initialize dwarf2 abbrevs */
3920 memset (cu_header
->dwarf2_abbrevs
, 0,
3921 ABBREV_HASH_SIZE
*sizeof (struct abbrev_info
*));
3923 abbrev_ptr
= dwarf_abbrev_buffer
+ cu_header
->abbrev_offset
;
3924 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3925 abbrev_ptr
+= bytes_read
;
3927 /* loop until we reach an abbrev number of 0 */
3928 while (abbrev_number
)
3930 cur_abbrev
= dwarf_alloc_abbrev ();
3932 /* read in abbrev header */
3933 cur_abbrev
->number
= abbrev_number
;
3934 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3935 abbrev_ptr
+= bytes_read
;
3936 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
3939 /* now read in declarations */
3940 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3941 abbrev_ptr
+= bytes_read
;
3942 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3943 abbrev_ptr
+= bytes_read
;
3946 if ((cur_abbrev
->num_attrs
% ATTR_ALLOC_CHUNK
) == 0)
3948 cur_abbrev
->attrs
= (struct attr_abbrev
*)
3949 xrealloc (cur_abbrev
->attrs
,
3950 (cur_abbrev
->num_attrs
+ ATTR_ALLOC_CHUNK
)
3951 * sizeof (struct attr_abbrev
));
3953 cur_abbrev
->attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
3954 cur_abbrev
->attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
3955 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3956 abbrev_ptr
+= bytes_read
;
3957 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3958 abbrev_ptr
+= bytes_read
;
3961 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
3962 cur_abbrev
->next
= cu_header
->dwarf2_abbrevs
[hash_number
];
3963 cu_header
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
3965 /* Get next abbreviation.
3966 Under Irix6 the abbreviations for a compilation unit are not
3967 always properly terminated with an abbrev number of 0.
3968 Exit loop if we encounter an abbreviation which we have
3969 already read (which means we are about to read the abbreviations
3970 for the next compile unit) or if the end of the abbreviation
3971 table is reached. */
3972 if ((unsigned int) (abbrev_ptr
- dwarf_abbrev_buffer
)
3973 >= dwarf_abbrev_size
)
3975 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3976 abbrev_ptr
+= bytes_read
;
3977 if (dwarf2_lookup_abbrev (abbrev_number
, cu_header
) != NULL
)
3982 /* Empty the abbrev table for a new compilation unit. */
3986 dwarf2_empty_abbrev_table (void *ptr_to_abbrevs_table
)
3989 struct abbrev_info
*abbrev
, *next
;
3990 struct abbrev_info
**abbrevs
;
3992 abbrevs
= (struct abbrev_info
**)ptr_to_abbrevs_table
;
3994 for (i
= 0; i
< ABBREV_HASH_SIZE
; ++i
)
3997 abbrev
= abbrevs
[i
];
4000 next
= abbrev
->next
;
4001 xfree (abbrev
->attrs
);
4009 /* Lookup an abbrev_info structure in the abbrev hash table. */
4011 static struct abbrev_info
*
4012 dwarf2_lookup_abbrev (unsigned int number
, const struct comp_unit_head
*cu_header
)
4014 unsigned int hash_number
;
4015 struct abbrev_info
*abbrev
;
4017 hash_number
= number
% ABBREV_HASH_SIZE
;
4018 abbrev
= cu_header
->dwarf2_abbrevs
[hash_number
];
4022 if (abbrev
->number
== number
)
4025 abbrev
= abbrev
->next
;
4030 /* Read a minimal amount of information into the minimal die structure. */
4033 read_partial_die (struct partial_die_info
*part_die
, bfd
*abfd
,
4034 char *info_ptr
, const struct comp_unit_head
*cu_header
)
4036 unsigned int abbrev_number
, bytes_read
, i
;
4037 struct abbrev_info
*abbrev
;
4038 struct attribute attr
;
4039 struct attribute spec_attr
;
4040 int found_spec_attr
= 0;
4041 int has_low_pc_attr
= 0;
4042 int has_high_pc_attr
= 0;
4044 *part_die
= zeroed_partial_die
;
4045 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4046 info_ptr
+= bytes_read
;
4050 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu_header
);
4053 error ("Dwarf Error: Could not find abbrev number %d [in module %s]", abbrev_number
,
4054 bfd_get_filename (abfd
));
4056 part_die
->offset
= info_ptr
- dwarf_info_buffer
;
4057 part_die
->tag
= abbrev
->tag
;
4058 part_die
->has_children
= abbrev
->has_children
;
4059 part_die
->abbrev
= abbrev_number
;
4061 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
4063 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
,
4064 info_ptr
, cu_header
);
4066 /* Store the data if it is of an attribute we want to keep in a
4067 partial symbol table. */
4072 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
4073 if (part_die
->name
== NULL
)
4074 part_die
->name
= DW_STRING (&attr
);
4076 case DW_AT_MIPS_linkage_name
:
4077 part_die
->name
= DW_STRING (&attr
);
4080 has_low_pc_attr
= 1;
4081 part_die
->lowpc
= DW_ADDR (&attr
);
4084 has_high_pc_attr
= 1;
4085 part_die
->highpc
= DW_ADDR (&attr
);
4087 case DW_AT_location
:
4088 /* Support the .debug_loc offsets */
4089 if (attr_form_is_block (&attr
))
4091 part_die
->locdesc
= DW_BLOCK (&attr
);
4093 else if (attr
.form
== DW_FORM_data4
|| attr
.form
== DW_FORM_data8
)
4095 dwarf2_complex_location_expr_complaint ();
4099 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
4100 "partial symbol information");
4103 case DW_AT_language
:
4104 part_die
->language
= DW_UNSND (&attr
);
4106 case DW_AT_external
:
4107 part_die
->is_external
= DW_UNSND (&attr
);
4109 case DW_AT_declaration
:
4110 part_die
->is_declaration
= DW_UNSND (&attr
);
4113 part_die
->has_type
= 1;
4115 case DW_AT_abstract_origin
:
4116 case DW_AT_specification
:
4117 found_spec_attr
= 1;
4121 /* Ignore absolute siblings, they might point outside of
4122 the current compile unit. */
4123 if (attr
.form
== DW_FORM_ref_addr
)
4124 complaint (&symfile_complaints
, "ignoring absolute DW_AT_sibling");
4127 dwarf_info_buffer
+ dwarf2_get_ref_die_offset (&attr
);
4134 /* If we found a reference attribute and the die has no name, try
4135 to find a name in the referred to die. */
4137 if (found_spec_attr
&& part_die
->name
== NULL
)
4139 struct partial_die_info spec_die
;
4143 spec_ptr
= dwarf_info_buffer
+ dwarf2_get_ref_die_offset (&spec_attr
);
4144 read_partial_die (&spec_die
, abfd
, spec_ptr
, cu_header
);
4147 part_die
->name
= spec_die
.name
;
4149 /* Copy DW_AT_external attribute if it is set. */
4150 if (spec_die
.is_external
)
4151 part_die
->is_external
= spec_die
.is_external
;
4155 /* When using the GNU linker, .gnu.linkonce. sections are used to
4156 eliminate duplicate copies of functions and vtables and such.
4157 The linker will arbitrarily choose one and discard the others.
4158 The AT_*_pc values for such functions refer to local labels in
4159 these sections. If the section from that file was discarded, the
4160 labels are not in the output, so the relocs get a value of 0.
4161 If this is a discarded function, mark the pc bounds as invalid,
4162 so that GDB will ignore it. */
4163 if (has_low_pc_attr
&& has_high_pc_attr
4164 && part_die
->lowpc
< part_die
->highpc
4165 && (part_die
->lowpc
!= 0
4166 || (bfd_get_file_flags (abfd
) & HAS_RELOC
)))
4167 part_die
->has_pc_info
= 1;
4171 /* Read the die from the .debug_info section buffer. And set diep to
4172 point to a newly allocated die with its information. */
4175 read_full_die (struct die_info
**diep
, bfd
*abfd
, char *info_ptr
,
4176 const struct comp_unit_head
*cu_header
)
4178 unsigned int abbrev_number
, bytes_read
, i
, offset
;
4179 struct abbrev_info
*abbrev
;
4180 struct die_info
*die
;
4182 offset
= info_ptr
- dwarf_info_buffer
;
4183 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4184 info_ptr
+= bytes_read
;
4187 die
= dwarf_alloc_die ();
4189 die
->abbrev
= abbrev_number
;
4195 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu_header
);
4198 error ("Dwarf Error: could not find abbrev number %d [in module %s]", abbrev_number
,
4199 bfd_get_filename (abfd
));
4201 die
= dwarf_alloc_die ();
4202 die
->offset
= offset
;
4203 die
->tag
= abbrev
->tag
;
4204 die
->has_children
= abbrev
->has_children
;
4205 die
->abbrev
= abbrev_number
;
4208 die
->num_attrs
= abbrev
->num_attrs
;
4209 die
->attrs
= (struct attribute
*)
4210 xmalloc (die
->num_attrs
* sizeof (struct attribute
));
4212 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
4214 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
4215 abfd
, info_ptr
, cu_header
);
4222 /* Read an attribute value described by an attribute form. */
4225 read_attribute_value (struct attribute
*attr
, unsigned form
,
4226 bfd
*abfd
, char *info_ptr
,
4227 const struct comp_unit_head
*cu_header
)
4229 unsigned int bytes_read
;
4230 struct dwarf_block
*blk
;
4236 case DW_FORM_ref_addr
:
4237 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu_header
, &bytes_read
);
4238 info_ptr
+= bytes_read
;
4240 case DW_FORM_block2
:
4241 blk
= dwarf_alloc_block ();
4242 blk
->size
= read_2_bytes (abfd
, info_ptr
);
4244 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
4245 info_ptr
+= blk
->size
;
4246 DW_BLOCK (attr
) = blk
;
4248 case DW_FORM_block4
:
4249 blk
= dwarf_alloc_block ();
4250 blk
->size
= read_4_bytes (abfd
, info_ptr
);
4252 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
4253 info_ptr
+= blk
->size
;
4254 DW_BLOCK (attr
) = blk
;
4257 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
4261 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
4265 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
4268 case DW_FORM_string
:
4269 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
4270 info_ptr
+= bytes_read
;
4273 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
4275 info_ptr
+= bytes_read
;
4278 blk
= dwarf_alloc_block ();
4279 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4280 info_ptr
+= bytes_read
;
4281 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
4282 info_ptr
+= blk
->size
;
4283 DW_BLOCK (attr
) = blk
;
4285 case DW_FORM_block1
:
4286 blk
= dwarf_alloc_block ();
4287 blk
->size
= read_1_byte (abfd
, info_ptr
);
4289 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
4290 info_ptr
+= blk
->size
;
4291 DW_BLOCK (attr
) = blk
;
4294 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
4298 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
4302 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
4303 info_ptr
+= bytes_read
;
4306 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4307 info_ptr
+= bytes_read
;
4310 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
4314 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
4318 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
4322 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
4325 case DW_FORM_ref_udata
:
4326 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4327 info_ptr
+= bytes_read
;
4329 case DW_FORM_indirect
:
4330 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4331 info_ptr
+= bytes_read
;
4332 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu_header
);
4335 error ("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]",
4336 dwarf_form_name (form
),
4337 bfd_get_filename (abfd
));
4342 /* Read an attribute described by an abbreviated attribute. */
4345 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
4346 bfd
*abfd
, char *info_ptr
,
4347 const struct comp_unit_head
*cu_header
)
4349 attr
->name
= abbrev
->name
;
4350 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu_header
);
4353 /* read dwarf information from a buffer */
4356 read_1_byte (bfd
*abfd
, char *buf
)
4358 return bfd_get_8 (abfd
, (bfd_byte
*) buf
);
4362 read_1_signed_byte (bfd
*abfd
, char *buf
)
4364 return bfd_get_signed_8 (abfd
, (bfd_byte
*) buf
);
4368 read_2_bytes (bfd
*abfd
, char *buf
)
4370 return bfd_get_16 (abfd
, (bfd_byte
*) buf
);
4374 read_2_signed_bytes (bfd
*abfd
, char *buf
)
4376 return bfd_get_signed_16 (abfd
, (bfd_byte
*) buf
);
4380 read_4_bytes (bfd
*abfd
, char *buf
)
4382 return bfd_get_32 (abfd
, (bfd_byte
*) buf
);
4386 read_4_signed_bytes (bfd
*abfd
, char *buf
)
4388 return bfd_get_signed_32 (abfd
, (bfd_byte
*) buf
);
4391 static unsigned long
4392 read_8_bytes (bfd
*abfd
, char *buf
)
4394 return bfd_get_64 (abfd
, (bfd_byte
*) buf
);
4398 read_address (bfd
*abfd
, char *buf
, const struct comp_unit_head
*cu_header
,
4401 CORE_ADDR retval
= 0;
4403 if (cu_header
->signed_addr_p
)
4405 switch (cu_header
->addr_size
)
4408 retval
= bfd_get_signed_16 (abfd
, (bfd_byte
*) buf
);
4411 retval
= bfd_get_signed_32 (abfd
, (bfd_byte
*) buf
);
4414 retval
= bfd_get_signed_64 (abfd
, (bfd_byte
*) buf
);
4417 internal_error (__FILE__
, __LINE__
,
4418 "read_address: bad switch, signed [in module %s]",
4419 bfd_get_filename (abfd
));
4424 switch (cu_header
->addr_size
)
4427 retval
= bfd_get_16 (abfd
, (bfd_byte
*) buf
);
4430 retval
= bfd_get_32 (abfd
, (bfd_byte
*) buf
);
4433 retval
= bfd_get_64 (abfd
, (bfd_byte
*) buf
);
4436 internal_error (__FILE__
, __LINE__
,
4437 "read_address: bad switch, unsigned [in module %s]",
4438 bfd_get_filename (abfd
));
4442 *bytes_read
= cu_header
->addr_size
;
4446 /* Read the initial length from a section. The (draft) DWARF 3
4447 specification allows the initial length to take up either 4 bytes
4448 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
4449 bytes describe the length and all offsets will be 8 bytes in length
4452 An older, non-standard 64-bit format is also handled by this
4453 function. The older format in question stores the initial length
4454 as an 8-byte quantity without an escape value. Lengths greater
4455 than 2^32 aren't very common which means that the initial 4 bytes
4456 is almost always zero. Since a length value of zero doesn't make
4457 sense for the 32-bit format, this initial zero can be considered to
4458 be an escape value which indicates the presence of the older 64-bit
4459 format. As written, the code can't detect (old format) lengths
4460 greater than 4GB. If it becomes necessary to handle lengths somewhat
4461 larger than 4GB, we could allow other small values (such as the
4462 non-sensical values of 1, 2, and 3) to also be used as escape values
4463 indicating the presence of the old format.
4465 The value returned via bytes_read should be used to increment
4466 the relevant pointer after calling read_initial_length().
4468 As a side effect, this function sets the fields initial_length_size
4469 and offset_size in cu_header to the values appropriate for the
4470 length field. (The format of the initial length field determines
4471 the width of file offsets to be fetched later with fetch_offset().)
4473 [ Note: read_initial_length() and read_offset() are based on the
4474 document entitled "DWARF Debugging Information Format", revision
4475 3, draft 8, dated November 19, 2001. This document was obtained
4478 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
4480 This document is only a draft and is subject to change. (So beware.)
4482 Details regarding the older, non-standard 64-bit format were
4483 determined empirically by examining 64-bit ELF files produced
4484 by the SGI toolchain on an IRIX 6.5 machine.
4486 - Kevin, July 16, 2002
4490 read_initial_length (bfd
*abfd
, char *buf
, struct comp_unit_head
*cu_header
,
4495 retval
= bfd_get_32 (abfd
, (bfd_byte
*) buf
);
4497 if (retval
== 0xffffffff)
4499 retval
= bfd_get_64 (abfd
, (bfd_byte
*) buf
+ 4);
4501 if (cu_header
!= NULL
)
4503 cu_header
->initial_length_size
= 12;
4504 cu_header
->offset_size
= 8;
4507 else if (retval
== 0)
4509 /* Handle (non-standard) 64-bit DWARF2 formats such as that used
4511 retval
= bfd_get_64 (abfd
, (bfd_byte
*) buf
);
4513 if (cu_header
!= NULL
)
4515 cu_header
->initial_length_size
= 8;
4516 cu_header
->offset_size
= 8;
4522 if (cu_header
!= NULL
)
4524 cu_header
->initial_length_size
= 4;
4525 cu_header
->offset_size
= 4;
4532 /* Read an offset from the data stream. The size of the offset is
4533 given by cu_header->offset_size. */
4536 read_offset (bfd
*abfd
, char *buf
, const struct comp_unit_head
*cu_header
,
4541 switch (cu_header
->offset_size
)
4544 retval
= bfd_get_32 (abfd
, (bfd_byte
*) buf
);
4548 retval
= bfd_get_64 (abfd
, (bfd_byte
*) buf
);
4552 internal_error (__FILE__
, __LINE__
,
4553 "read_offset: bad switch [in module %s]",
4554 bfd_get_filename (abfd
));
4561 read_n_bytes (bfd
*abfd
, char *buf
, unsigned int size
)
4563 /* If the size of a host char is 8 bits, we can return a pointer
4564 to the buffer, otherwise we have to copy the data to a buffer
4565 allocated on the temporary obstack. */
4566 gdb_assert (HOST_CHAR_BIT
== 8);
4571 read_string (bfd
*abfd
, char *buf
, unsigned int *bytes_read_ptr
)
4573 /* If the size of a host char is 8 bits, we can return a pointer
4574 to the string, otherwise we have to copy the string to a buffer
4575 allocated on the temporary obstack. */
4576 gdb_assert (HOST_CHAR_BIT
== 8);
4579 *bytes_read_ptr
= 1;
4582 *bytes_read_ptr
= strlen (buf
) + 1;
4587 read_indirect_string (bfd
*abfd
, char *buf
,
4588 const struct comp_unit_head
*cu_header
,
4589 unsigned int *bytes_read_ptr
)
4591 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
,
4592 (int *) bytes_read_ptr
);
4594 if (dwarf_str_buffer
== NULL
)
4596 error ("DW_FORM_strp used without .debug_str section [in module %s]",
4597 bfd_get_filename (abfd
));
4600 if (str_offset
>= dwarf_str_size
)
4602 error ("DW_FORM_strp pointing outside of .debug_str section [in module %s]",
4603 bfd_get_filename (abfd
));
4606 gdb_assert (HOST_CHAR_BIT
== 8);
4607 if (dwarf_str_buffer
[str_offset
] == '\0')
4609 return dwarf_str_buffer
+ str_offset
;
4612 static unsigned long
4613 read_unsigned_leb128 (bfd
*abfd
, char *buf
, unsigned int *bytes_read_ptr
)
4615 unsigned long result
;
4616 unsigned int num_read
;
4626 byte
= bfd_get_8 (abfd
, (bfd_byte
*) buf
);
4629 result
|= ((unsigned long)(byte
& 127) << shift
);
4630 if ((byte
& 128) == 0)
4636 *bytes_read_ptr
= num_read
;
4641 read_signed_leb128 (bfd
*abfd
, char *buf
, unsigned int *bytes_read_ptr
)
4644 int i
, shift
, size
, num_read
;
4654 byte
= bfd_get_8 (abfd
, (bfd_byte
*) buf
);
4657 result
|= ((long)(byte
& 127) << shift
);
4659 if ((byte
& 128) == 0)
4664 if ((shift
< size
) && (byte
& 0x40))
4666 result
|= -(1 << shift
);
4668 *bytes_read_ptr
= num_read
;
4673 set_cu_language (unsigned int lang
)
4679 cu_language
= language_c
;
4681 case DW_LANG_C_plus_plus
:
4682 cu_language
= language_cplus
;
4684 case DW_LANG_Fortran77
:
4685 case DW_LANG_Fortran90
:
4686 case DW_LANG_Fortran95
:
4687 cu_language
= language_fortran
;
4689 case DW_LANG_Mips_Assembler
:
4690 cu_language
= language_asm
;
4693 cu_language
= language_java
;
4697 case DW_LANG_Cobol74
:
4698 case DW_LANG_Cobol85
:
4699 case DW_LANG_Pascal83
:
4700 case DW_LANG_Modula2
:
4702 cu_language
= language_minimal
;
4705 cu_language_defn
= language_def (cu_language
);
4708 /* Return the named attribute or NULL if not there. */
4710 static struct attribute
*
4711 dwarf_attr (struct die_info
*die
, unsigned int name
)
4714 struct attribute
*spec
= NULL
;
4716 for (i
= 0; i
< die
->num_attrs
; ++i
)
4718 if (die
->attrs
[i
].name
== name
)
4720 return &die
->attrs
[i
];
4722 if (die
->attrs
[i
].name
== DW_AT_specification
4723 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
4724 spec
= &die
->attrs
[i
];
4728 struct die_info
*ref_die
=
4729 follow_die_ref (dwarf2_get_ref_die_offset (spec
));
4732 return dwarf_attr (ref_die
, name
);
4739 die_is_declaration (struct die_info
*die
)
4741 return (dwarf_attr (die
, DW_AT_declaration
)
4742 && ! dwarf_attr (die
, DW_AT_specification
));
4746 /* Free the line_header structure *LH, and any arrays and strings it
4749 free_line_header (struct line_header
*lh
)
4751 if (lh
->standard_opcode_lengths
)
4752 xfree (lh
->standard_opcode_lengths
);
4754 /* Remember that all the lh->file_names[i].name pointers are
4755 pointers into debug_line_buffer, and don't need to be freed. */
4757 xfree (lh
->file_names
);
4759 /* Similarly for the include directory names. */
4760 if (lh
->include_dirs
)
4761 xfree (lh
->include_dirs
);
4767 /* Add an entry to LH's include directory table. */
4769 add_include_dir (struct line_header
*lh
, char *include_dir
)
4771 /* Grow the array if necessary. */
4772 if (lh
->include_dirs_size
== 0)
4774 lh
->include_dirs_size
= 1; /* for testing */
4775 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
4776 * sizeof (*lh
->include_dirs
));
4778 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
4780 lh
->include_dirs_size
*= 2;
4781 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
4782 (lh
->include_dirs_size
4783 * sizeof (*lh
->include_dirs
)));
4786 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
4790 /* Add an entry to LH's file name table. */
4792 add_file_name (struct line_header
*lh
,
4794 unsigned int dir_index
,
4795 unsigned int mod_time
,
4796 unsigned int length
)
4798 struct file_entry
*fe
;
4800 /* Grow the array if necessary. */
4801 if (lh
->file_names_size
== 0)
4803 lh
->file_names_size
= 1; /* for testing */
4804 lh
->file_names
= xmalloc (lh
->file_names_size
4805 * sizeof (*lh
->file_names
));
4807 else if (lh
->num_file_names
>= lh
->file_names_size
)
4809 lh
->file_names_size
*= 2;
4810 lh
->file_names
= xrealloc (lh
->file_names
,
4811 (lh
->file_names_size
4812 * sizeof (*lh
->file_names
)));
4815 fe
= &lh
->file_names
[lh
->num_file_names
++];
4817 fe
->dir_index
= dir_index
;
4818 fe
->mod_time
= mod_time
;
4819 fe
->length
= length
;
4823 /* Read the statement program header starting at OFFSET in
4824 dwarf_line_buffer, according to the endianness of ABFD. Return a
4825 pointer to a struct line_header, allocated using xmalloc.
4827 NOTE: the strings in the include directory and file name tables of
4828 the returned object point into debug_line_buffer, and must not be
4830 static struct line_header
*
4831 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
4832 const struct comp_unit_head
*cu_header
)
4834 struct cleanup
*back_to
;
4835 struct line_header
*lh
;
4839 char *cur_dir
, *cur_file
;
4841 if (dwarf_line_buffer
== NULL
)
4843 complaint (&symfile_complaints
, "missing .debug_line section");
4847 /* Make sure that at least there's room for the total_length field. That
4848 could be 12 bytes long, but we're just going to fudge that. */
4849 if (offset
+ 4 >= dwarf_line_size
)
4851 dwarf2_statement_list_fits_in_line_number_section_complaint ();
4855 lh
= xmalloc (sizeof (*lh
));
4856 memset (lh
, 0, sizeof (*lh
));
4857 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
4860 line_ptr
= dwarf_line_buffer
+ offset
;
4862 /* read in the header */
4863 lh
->total_length
= read_initial_length (abfd
, line_ptr
, NULL
, &bytes_read
);
4864 line_ptr
+= bytes_read
;
4865 if (line_ptr
+ lh
->total_length
> dwarf_line_buffer
+ dwarf_line_size
)
4867 dwarf2_statement_list_fits_in_line_number_section_complaint ();
4870 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
4871 lh
->version
= read_2_bytes (abfd
, line_ptr
);
4873 lh
->header_length
= read_offset (abfd
, line_ptr
, cu_header
, &bytes_read
);
4874 line_ptr
+= bytes_read
;
4875 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
4877 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
4879 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
4881 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
4883 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
4885 lh
->standard_opcode_lengths
4886 = (unsigned char *) xmalloc (lh
->opcode_base
* sizeof (unsigned char));
4888 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
4889 for (i
= 1; i
< lh
->opcode_base
; ++i
)
4891 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
4895 /* Read directory table */
4896 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
4898 line_ptr
+= bytes_read
;
4899 add_include_dir (lh
, cur_dir
);
4901 line_ptr
+= bytes_read
;
4903 /* Read file name table */
4904 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
4906 unsigned int dir_index
, mod_time
, length
;
4908 line_ptr
+= bytes_read
;
4909 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
4910 line_ptr
+= bytes_read
;
4911 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
4912 line_ptr
+= bytes_read
;
4913 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
4914 line_ptr
+= bytes_read
;
4916 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
4918 line_ptr
+= bytes_read
;
4919 lh
->statement_program_start
= line_ptr
;
4921 if (line_ptr
> dwarf_line_buffer
+ dwarf_line_size
)
4922 complaint (&symfile_complaints
,
4923 "line number info header doesn't fit in `.debug_line' section");
4925 discard_cleanups (back_to
);
4929 /* This function exists to work around a bug in certain compilers
4930 (particularly GCC 2.95), in which the first line number marker of a
4931 function does not show up until after the prologue, right before
4932 the second line number marker. This function shifts ADDRESS down
4933 to the beginning of the function if necessary, and is called on
4934 addresses passed to record_line. */
4937 check_cu_functions (CORE_ADDR address
)
4939 struct function_range
*fn
;
4941 /* Find the function_range containing address. */
4946 cu_cached_fn
= cu_first_fn
;
4950 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
4956 while (fn
&& fn
!= cu_cached_fn
)
4957 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
4967 if (address
!= fn
->lowpc
)
4968 complaint (&symfile_complaints
,
4969 "misplaced first line number at 0x%lx for '%s'",
4970 (unsigned long) address
, fn
->name
);
4975 /* Decode the line number information for the compilation unit whose
4976 line number info is at OFFSET in the .debug_line section.
4977 The compilation directory of the file is passed in COMP_DIR. */
4980 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
4981 const struct comp_unit_head
*cu_header
)
4985 unsigned int i
, bytes_read
;
4987 unsigned char op_code
, extended_op
, adj_opcode
;
4989 line_ptr
= lh
->statement_program_start
;
4990 line_end
= lh
->statement_program_end
;
4992 /* Read the statement sequences until there's nothing left. */
4993 while (line_ptr
< line_end
)
4995 /* state machine registers */
4996 CORE_ADDR address
= 0;
4997 unsigned int file
= 1;
4998 unsigned int line
= 1;
4999 unsigned int column
= 0;
5000 int is_stmt
= lh
->default_is_stmt
;
5001 int basic_block
= 0;
5002 int end_sequence
= 0;
5004 /* Start a subfile for the current file of the state machine. */
5005 if (lh
->num_file_names
>= file
)
5007 /* lh->include_dirs and lh->file_names are 0-based, but the
5008 directory and file name numbers in the statement program
5010 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
5013 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
5016 dwarf2_start_subfile (fe
->name
, dir
);
5019 /* Decode the table. */
5020 while (!end_sequence
)
5022 op_code
= read_1_byte (abfd
, line_ptr
);
5025 if (op_code
>= lh
->opcode_base
)
5026 { /* Special operand. */
5027 adj_opcode
= op_code
- lh
->opcode_base
;
5028 address
+= (adj_opcode
/ lh
->line_range
)
5029 * lh
->minimum_instruction_length
;
5030 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
5031 /* append row to matrix using current values */
5032 record_line (current_subfile
, line
,
5033 check_cu_functions (address
));
5036 else switch (op_code
)
5038 case DW_LNS_extended_op
:
5039 line_ptr
+= 1; /* ignore length */
5040 extended_op
= read_1_byte (abfd
, line_ptr
);
5042 switch (extended_op
)
5044 case DW_LNE_end_sequence
:
5046 record_line (current_subfile
, 0, address
);
5048 case DW_LNE_set_address
:
5049 address
= read_address (abfd
, line_ptr
, cu_header
, &bytes_read
);
5050 line_ptr
+= bytes_read
;
5051 address
+= baseaddr
;
5053 case DW_LNE_define_file
:
5056 unsigned int dir_index
, mod_time
, length
;
5058 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
5059 line_ptr
+= bytes_read
;
5061 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
5062 line_ptr
+= bytes_read
;
5064 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
5065 line_ptr
+= bytes_read
;
5067 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
5068 line_ptr
+= bytes_read
;
5069 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
5073 complaint (&symfile_complaints
,
5074 "mangled .debug_line section");
5079 record_line (current_subfile
, line
,
5080 check_cu_functions (address
));
5083 case DW_LNS_advance_pc
:
5084 address
+= lh
->minimum_instruction_length
5085 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
5086 line_ptr
+= bytes_read
;
5088 case DW_LNS_advance_line
:
5089 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
5090 line_ptr
+= bytes_read
;
5092 case DW_LNS_set_file
:
5094 /* lh->include_dirs and lh->file_names are 0-based,
5095 but the directory and file name numbers in the
5096 statement program are 1-based. */
5097 struct file_entry
*fe
;
5099 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
5100 line_ptr
+= bytes_read
;
5101 fe
= &lh
->file_names
[file
- 1];
5103 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
5106 dwarf2_start_subfile (fe
->name
, dir
);
5109 case DW_LNS_set_column
:
5110 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
5111 line_ptr
+= bytes_read
;
5113 case DW_LNS_negate_stmt
:
5114 is_stmt
= (!is_stmt
);
5116 case DW_LNS_set_basic_block
:
5119 /* Add to the address register of the state machine the
5120 address increment value corresponding to special opcode
5121 255. Ie, this value is scaled by the minimum instruction
5122 length since special opcode 255 would have scaled the
5124 case DW_LNS_const_add_pc
:
5125 address
+= (lh
->minimum_instruction_length
5126 * ((255 - lh
->opcode_base
) / lh
->line_range
));
5128 case DW_LNS_fixed_advance_pc
:
5129 address
+= read_2_bytes (abfd
, line_ptr
);
5133 { /* Unknown standard opcode, ignore it. */
5135 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
5137 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
5138 line_ptr
+= bytes_read
;
5146 /* Start a subfile for DWARF. FILENAME is the name of the file and
5147 DIRNAME the name of the source directory which contains FILENAME
5148 or NULL if not known.
5149 This routine tries to keep line numbers from identical absolute and
5150 relative file names in a common subfile.
5152 Using the `list' example from the GDB testsuite, which resides in
5153 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
5154 of /srcdir/list0.c yields the following debugging information for list0.c:
5156 DW_AT_name: /srcdir/list0.c
5157 DW_AT_comp_dir: /compdir
5158 files.files[0].name: list0.h
5159 files.files[0].dir: /srcdir
5160 files.files[1].name: list0.c
5161 files.files[1].dir: /srcdir
5163 The line number information for list0.c has to end up in a single
5164 subfile, so that `break /srcdir/list0.c:1' works as expected. */
5167 dwarf2_start_subfile (char *filename
, char *dirname
)
5169 /* If the filename isn't absolute, try to match an existing subfile
5170 with the full pathname. */
5172 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
5174 struct subfile
*subfile
;
5175 char *fullname
= concat (dirname
, "/", filename
, NULL
);
5177 for (subfile
= subfiles
; subfile
; subfile
= subfile
->next
)
5179 if (FILENAME_CMP (subfile
->name
, fullname
) == 0)
5181 current_subfile
= subfile
;
5188 start_subfile (filename
, dirname
);
5192 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
5193 struct objfile
*objfile
,
5194 const struct comp_unit_head
*cu_header
)
5196 /* NOTE drow/2003-01-30: There used to be a comment and some special
5197 code here to turn a symbol with DW_AT_external and a
5198 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
5199 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
5200 with some versions of binutils) where shared libraries could have
5201 relocations against symbols in their debug information - the
5202 minimal symbol would have the right address, but the debug info
5203 would not. It's no longer necessary, because we will explicitly
5204 apply relocations when we read in the debug information now. */
5206 /* A DW_AT_location attribute with no contents indicates that a
5207 variable has been optimized away. */
5208 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
5210 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
5214 /* Handle one degenerate form of location expression specially, to
5215 preserve GDB's previous behavior when section offsets are
5216 specified. If this is just a DW_OP_addr then mark this symbol
5219 if (attr_form_is_block (attr
)
5220 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
5221 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
5225 SYMBOL_VALUE_ADDRESS (sym
) =
5226 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu_header
,
5228 fixup_symbol_section (sym
, objfile
);
5229 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
5230 SYMBOL_SECTION (sym
));
5231 SYMBOL_CLASS (sym
) = LOC_STATIC
;
5235 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
5236 expression evaluator, and use LOC_COMPUTED only when necessary
5237 (i.e. when the value of a register or memory location is
5238 referenced, or a thread-local block, etc.). Then again, it might
5239 not be worthwhile. I'm assuming that it isn't unless performance
5240 or memory numbers show me otherwise. */
5242 dwarf2_symbol_mark_computed (attr
, sym
, cu_header
, objfile
);
5243 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
5246 /* Given a pointer to a DWARF information entry, figure out if we need
5247 to make a symbol table entry for it, and if so, create a new entry
5248 and return a pointer to it.
5249 If TYPE is NULL, determine symbol type from the die, otherwise
5250 used the passed type. */
5252 static struct symbol
*
5253 new_symbol (struct die_info
*die
, struct type
*type
, struct objfile
*objfile
,
5254 const struct comp_unit_head
*cu_header
)
5256 struct symbol
*sym
= NULL
;
5258 struct attribute
*attr
= NULL
;
5259 struct attribute
*attr2
= NULL
;
5262 if (die
->tag
!= DW_TAG_namespace
)
5263 name
= dwarf2_linkage_name (die
);
5265 name
= TYPE_NAME (type
);
5269 sym
= (struct symbol
*) obstack_alloc (&objfile
->symbol_obstack
,
5270 sizeof (struct symbol
));
5271 OBJSTAT (objfile
, n_syms
++);
5272 memset (sym
, 0, sizeof (struct symbol
));
5274 /* Cache this symbol's name and the name's demangled form (if any). */
5275 SYMBOL_LANGUAGE (sym
) = cu_language
;
5276 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), objfile
);
5278 /* Default assumptions.
5279 Use the passed type or decode it from the die. */
5280 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
5281 SYMBOL_CLASS (sym
) = LOC_STATIC
;
5283 SYMBOL_TYPE (sym
) = type
;
5285 SYMBOL_TYPE (sym
) = die_type (die
, objfile
, cu_header
);
5286 attr
= dwarf_attr (die
, DW_AT_decl_line
);
5289 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
5294 attr
= dwarf_attr (die
, DW_AT_low_pc
);
5297 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
5299 SYMBOL_CLASS (sym
) = LOC_LABEL
;
5301 case DW_TAG_subprogram
:
5302 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
5304 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
5305 attr2
= dwarf_attr (die
, DW_AT_external
);
5306 if (attr2
&& (DW_UNSND (attr2
) != 0))
5308 add_symbol_to_list (sym
, &global_symbols
);
5312 add_symbol_to_list (sym
, list_in_scope
);
5315 case DW_TAG_variable
:
5316 /* Compilation with minimal debug info may result in variables
5317 with missing type entries. Change the misleading `void' type
5318 to something sensible. */
5319 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
5320 SYMBOL_TYPE (sym
) = init_type (TYPE_CODE_INT
,
5321 TARGET_INT_BIT
/ HOST_CHAR_BIT
, 0,
5322 "<variable, no debug info>",
5324 attr
= dwarf_attr (die
, DW_AT_const_value
);
5327 dwarf2_const_value (attr
, sym
, objfile
, cu_header
);
5328 attr2
= dwarf_attr (die
, DW_AT_external
);
5329 if (attr2
&& (DW_UNSND (attr2
) != 0))
5330 add_symbol_to_list (sym
, &global_symbols
);
5332 add_symbol_to_list (sym
, list_in_scope
);
5335 attr
= dwarf_attr (die
, DW_AT_location
);
5338 var_decode_location (attr
, sym
, objfile
, cu_header
);
5339 attr2
= dwarf_attr (die
, DW_AT_external
);
5340 if (attr2
&& (DW_UNSND (attr2
) != 0))
5341 add_symbol_to_list (sym
, &global_symbols
);
5343 add_symbol_to_list (sym
, list_in_scope
);
5347 /* We do not know the address of this symbol.
5348 If it is an external symbol and we have type information
5349 for it, enter the symbol as a LOC_UNRESOLVED symbol.
5350 The address of the variable will then be determined from
5351 the minimal symbol table whenever the variable is
5353 attr2
= dwarf_attr (die
, DW_AT_external
);
5354 if (attr2
&& (DW_UNSND (attr2
) != 0)
5355 && dwarf_attr (die
, DW_AT_type
) != NULL
)
5357 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
5358 add_symbol_to_list (sym
, &global_symbols
);
5362 case DW_TAG_formal_parameter
:
5363 attr
= dwarf_attr (die
, DW_AT_location
);
5366 var_decode_location (attr
, sym
, objfile
, cu_header
);
5367 /* FIXME drow/2003-07-31: Is LOC_COMPUTED_ARG necessary? */
5368 if (SYMBOL_CLASS (sym
) == LOC_COMPUTED
)
5369 SYMBOL_CLASS (sym
) = LOC_COMPUTED_ARG
;
5371 attr
= dwarf_attr (die
, DW_AT_const_value
);
5374 dwarf2_const_value (attr
, sym
, objfile
, cu_header
);
5376 add_symbol_to_list (sym
, list_in_scope
);
5378 case DW_TAG_unspecified_parameters
:
5379 /* From varargs functions; gdb doesn't seem to have any
5380 interest in this information, so just ignore it for now.
5383 case DW_TAG_class_type
:
5384 case DW_TAG_structure_type
:
5385 case DW_TAG_union_type
:
5386 case DW_TAG_enumeration_type
:
5387 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
5388 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
5389 add_symbol_to_list (sym
, list_in_scope
);
5391 /* The semantics of C++ state that "struct foo { ... }" also
5392 defines a typedef for "foo". Synthesize a typedef symbol so
5393 that "ptype foo" works as expected. */
5394 if (cu_language
== language_cplus
)
5396 struct symbol
*typedef_sym
= (struct symbol
*)
5397 obstack_alloc (&objfile
->symbol_obstack
,
5398 sizeof (struct symbol
));
5399 *typedef_sym
= *sym
;
5400 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
5401 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
5402 TYPE_NAME (SYMBOL_TYPE (sym
)) =
5403 obsavestring (DEPRECATED_SYMBOL_NAME (sym
),
5404 strlen (DEPRECATED_SYMBOL_NAME (sym
)),
5405 &objfile
->type_obstack
);
5406 add_symbol_to_list (typedef_sym
, list_in_scope
);
5409 case DW_TAG_typedef
:
5410 case DW_TAG_base_type
:
5411 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
5412 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
5413 add_symbol_to_list (sym
, list_in_scope
);
5415 case DW_TAG_enumerator
:
5416 attr
= dwarf_attr (die
, DW_AT_const_value
);
5419 dwarf2_const_value (attr
, sym
, objfile
, cu_header
);
5421 add_symbol_to_list (sym
, list_in_scope
);
5423 case DW_TAG_namespace
:
5424 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
5425 add_symbol_to_list (sym
, &global_symbols
);
5428 /* Not a tag we recognize. Hopefully we aren't processing
5429 trash data, but since we must specifically ignore things
5430 we don't recognize, there is nothing else we should do at
5432 complaint (&symfile_complaints
, "unsupported tag: '%s'",
5433 dwarf_tag_name (die
->tag
));
5440 /* Copy constant value from an attribute to a symbol. */
5443 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
5444 struct objfile
*objfile
,
5445 const struct comp_unit_head
*cu_header
)
5447 struct dwarf_block
*blk
;
5452 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
5453 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
5454 cu_header
->addr_size
,
5455 TYPE_LENGTH (SYMBOL_TYPE
5457 SYMBOL_VALUE_BYTES (sym
) = (char *)
5458 obstack_alloc (&objfile
->symbol_obstack
, cu_header
->addr_size
);
5459 /* NOTE: cagney/2003-05-09: In-lined store_address call with
5460 it's body - store_unsigned_integer. */
5461 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
5463 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
5465 case DW_FORM_block1
:
5466 case DW_FORM_block2
:
5467 case DW_FORM_block4
:
5469 blk
= DW_BLOCK (attr
);
5470 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
5471 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
5473 TYPE_LENGTH (SYMBOL_TYPE
5475 SYMBOL_VALUE_BYTES (sym
) = (char *)
5476 obstack_alloc (&objfile
->symbol_obstack
, blk
->size
);
5477 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
5478 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
5481 /* The DW_AT_const_value attributes are supposed to carry the
5482 symbol's value "represented as it would be on the target
5483 architecture." By the time we get here, it's already been
5484 converted to host endianness, so we just need to sign- or
5485 zero-extend it as appropriate. */
5487 dwarf2_const_value_data (attr
, sym
, 8);
5490 dwarf2_const_value_data (attr
, sym
, 16);
5493 dwarf2_const_value_data (attr
, sym
, 32);
5496 dwarf2_const_value_data (attr
, sym
, 64);
5500 SYMBOL_VALUE (sym
) = DW_SND (attr
);
5501 SYMBOL_CLASS (sym
) = LOC_CONST
;
5505 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
5506 SYMBOL_CLASS (sym
) = LOC_CONST
;
5510 complaint (&symfile_complaints
,
5511 "unsupported const value attribute form: '%s'",
5512 dwarf_form_name (attr
->form
));
5513 SYMBOL_VALUE (sym
) = 0;
5514 SYMBOL_CLASS (sym
) = LOC_CONST
;
5520 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
5521 or zero-extend it as appropriate for the symbol's type. */
5523 dwarf2_const_value_data (struct attribute
*attr
,
5527 LONGEST l
= DW_UNSND (attr
);
5529 if (bits
< sizeof (l
) * 8)
5531 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
5532 l
&= ((LONGEST
) 1 << bits
) - 1;
5534 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
5537 SYMBOL_VALUE (sym
) = l
;
5538 SYMBOL_CLASS (sym
) = LOC_CONST
;
5542 /* Return the type of the die in question using its DW_AT_type attribute. */
5544 static struct type
*
5545 die_type (struct die_info
*die
, struct objfile
*objfile
,
5546 const struct comp_unit_head
*cu_header
)
5549 struct attribute
*type_attr
;
5550 struct die_info
*type_die
;
5553 type_attr
= dwarf_attr (die
, DW_AT_type
);
5556 /* A missing DW_AT_type represents a void type. */
5557 return dwarf2_fundamental_type (objfile
, FT_VOID
);
5561 ref
= dwarf2_get_ref_die_offset (type_attr
);
5562 type_die
= follow_die_ref (ref
);
5565 error ("Dwarf Error: Cannot find referent at offset %d [in module %s]",
5566 ref
, objfile
->name
);
5570 type
= tag_type_to_type (type_die
, objfile
, cu_header
);
5573 dump_die (type_die
);
5574 error ("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]",
5580 /* Return the containing type of the die in question using its
5581 DW_AT_containing_type attribute. */
5583 static struct type
*
5584 die_containing_type (struct die_info
*die
, struct objfile
*objfile
,
5585 const struct comp_unit_head
*cu_header
)
5587 struct type
*type
= NULL
;
5588 struct attribute
*type_attr
;
5589 struct die_info
*type_die
= NULL
;
5592 type_attr
= dwarf_attr (die
, DW_AT_containing_type
);
5595 ref
= dwarf2_get_ref_die_offset (type_attr
);
5596 type_die
= follow_die_ref (ref
);
5599 error ("Dwarf Error: Cannot find referent at offset %d [in module %s]", ref
,
5603 type
= tag_type_to_type (type_die
, objfile
, cu_header
);
5608 dump_die (type_die
);
5609 error ("Dwarf Error: Problem turning containing type into gdb type [in module %s]",
5616 static struct type
*
5617 type_at_offset (unsigned int offset
, struct objfile
*objfile
)
5619 struct die_info
*die
;
5622 die
= follow_die_ref (offset
);
5625 error ("Dwarf Error: Cannot find type referent at offset %d.", offset
);
5628 type
= tag_type_to_type (die
, objfile
);
5633 static struct type
*
5634 tag_type_to_type (struct die_info
*die
, struct objfile
*objfile
,
5635 const struct comp_unit_head
*cu_header
)
5643 read_type_die (die
, objfile
, cu_header
);
5647 error ("Dwarf Error: Cannot find type of die [in module %s]",
5655 read_type_die (struct die_info
*die
, struct objfile
*objfile
,
5656 const struct comp_unit_head
*cu_header
)
5660 case DW_TAG_class_type
:
5661 case DW_TAG_structure_type
:
5662 case DW_TAG_union_type
:
5663 read_structure_scope (die
, objfile
, cu_header
);
5665 case DW_TAG_enumeration_type
:
5666 read_enumeration (die
, objfile
, cu_header
);
5668 case DW_TAG_subprogram
:
5669 case DW_TAG_subroutine_type
:
5670 read_subroutine_type (die
, objfile
, cu_header
);
5672 case DW_TAG_array_type
:
5673 read_array_type (die
, objfile
, cu_header
);
5675 case DW_TAG_pointer_type
:
5676 read_tag_pointer_type (die
, objfile
, cu_header
);
5678 case DW_TAG_ptr_to_member_type
:
5679 read_tag_ptr_to_member_type (die
, objfile
, cu_header
);
5681 case DW_TAG_reference_type
:
5682 read_tag_reference_type (die
, objfile
, cu_header
);
5684 case DW_TAG_const_type
:
5685 read_tag_const_type (die
, objfile
, cu_header
);
5687 case DW_TAG_volatile_type
:
5688 read_tag_volatile_type (die
, objfile
, cu_header
);
5690 case DW_TAG_string_type
:
5691 read_tag_string_type (die
, objfile
);
5693 case DW_TAG_typedef
:
5694 read_typedef (die
, objfile
, cu_header
);
5696 case DW_TAG_base_type
:
5697 read_base_type (die
, objfile
);
5700 complaint (&symfile_complaints
, "unexepected tag in read_type_die: '%s'",
5701 dwarf_tag_name (die
->tag
));
5706 static struct type
*
5707 dwarf_base_type (int encoding
, int size
, struct objfile
*objfile
)
5709 /* FIXME - this should not produce a new (struct type *)
5710 every time. It should cache base types. */
5714 case DW_ATE_address
:
5715 type
= dwarf2_fundamental_type (objfile
, FT_VOID
);
5717 case DW_ATE_boolean
:
5718 type
= dwarf2_fundamental_type (objfile
, FT_BOOLEAN
);
5720 case DW_ATE_complex_float
:
5723 type
= dwarf2_fundamental_type (objfile
, FT_DBL_PREC_COMPLEX
);
5727 type
= dwarf2_fundamental_type (objfile
, FT_COMPLEX
);
5733 type
= dwarf2_fundamental_type (objfile
, FT_DBL_PREC_FLOAT
);
5737 type
= dwarf2_fundamental_type (objfile
, FT_FLOAT
);
5744 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_CHAR
);
5747 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_SHORT
);
5751 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_INTEGER
);
5755 case DW_ATE_signed_char
:
5756 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_CHAR
);
5758 case DW_ATE_unsigned
:
5762 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_CHAR
);
5765 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_SHORT
);
5769 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_INTEGER
);
5773 case DW_ATE_unsigned_char
:
5774 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_CHAR
);
5777 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_INTEGER
);
5784 copy_die (struct die_info
*old_die
)
5786 struct die_info
*new_die
;
5789 new_die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
5790 memset (new_die
, 0, sizeof (struct die_info
));
5792 new_die
->tag
= old_die
->tag
;
5793 new_die
->has_children
= old_die
->has_children
;
5794 new_die
->abbrev
= old_die
->abbrev
;
5795 new_die
->offset
= old_die
->offset
;
5796 new_die
->type
= NULL
;
5798 num_attrs
= old_die
->num_attrs
;
5799 new_die
->num_attrs
= num_attrs
;
5800 new_die
->attrs
= (struct attribute
*)
5801 xmalloc (num_attrs
* sizeof (struct attribute
));
5803 for (i
= 0; i
< old_die
->num_attrs
; ++i
)
5805 new_die
->attrs
[i
].name
= old_die
->attrs
[i
].name
;
5806 new_die
->attrs
[i
].form
= old_die
->attrs
[i
].form
;
5807 new_die
->attrs
[i
].u
.addr
= old_die
->attrs
[i
].u
.addr
;
5810 new_die
->next
= NULL
;
5815 /* Return sibling of die, NULL if no sibling. */
5817 static struct die_info
*
5818 sibling_die (struct die_info
*die
)
5820 int nesting_level
= 0;
5822 if (!die
->has_children
)
5824 if (die
->next
&& (die
->next
->tag
== 0))
5837 if (die
->has_children
)
5847 while (nesting_level
);
5848 if (die
&& (die
->tag
== 0))
5859 /* Get linkage name of a die, return NULL if not found. */
5862 dwarf2_linkage_name (struct die_info
*die
)
5864 struct attribute
*attr
;
5866 attr
= dwarf_attr (die
, DW_AT_MIPS_linkage_name
);
5867 if (attr
&& DW_STRING (attr
))
5868 return DW_STRING (attr
);
5869 attr
= dwarf_attr (die
, DW_AT_name
);
5870 if (attr
&& DW_STRING (attr
))
5871 return DW_STRING (attr
);
5875 /* Get name of a die, return NULL if not found. */
5878 dwarf2_name (struct die_info
*die
)
5880 struct attribute
*attr
;
5882 attr
= dwarf_attr (die
, DW_AT_name
);
5883 if (attr
&& DW_STRING (attr
))
5884 return DW_STRING (attr
);
5888 /* Return the die that this die in an extension of, or NULL if there
5891 static struct die_info
*
5892 dwarf2_extension (struct die_info
*die
)
5894 struct attribute
*attr
;
5895 struct die_info
*extension_die
;
5898 attr
= dwarf_attr (die
, DW_AT_extension
);
5902 ref
= dwarf2_get_ref_die_offset (attr
);
5903 extension_die
= follow_die_ref (ref
);
5906 error ("Dwarf Error: Cannot find referent at offset %d.", ref
);
5909 return extension_die
;
5912 /* Convert a DIE tag into its string name. */
5915 dwarf_tag_name (register unsigned tag
)
5919 case DW_TAG_padding
:
5920 return "DW_TAG_padding";
5921 case DW_TAG_array_type
:
5922 return "DW_TAG_array_type";
5923 case DW_TAG_class_type
:
5924 return "DW_TAG_class_type";
5925 case DW_TAG_entry_point
:
5926 return "DW_TAG_entry_point";
5927 case DW_TAG_enumeration_type
:
5928 return "DW_TAG_enumeration_type";
5929 case DW_TAG_formal_parameter
:
5930 return "DW_TAG_formal_parameter";
5931 case DW_TAG_imported_declaration
:
5932 return "DW_TAG_imported_declaration";
5934 return "DW_TAG_label";
5935 case DW_TAG_lexical_block
:
5936 return "DW_TAG_lexical_block";
5938 return "DW_TAG_member";
5939 case DW_TAG_pointer_type
:
5940 return "DW_TAG_pointer_type";
5941 case DW_TAG_reference_type
:
5942 return "DW_TAG_reference_type";
5943 case DW_TAG_compile_unit
:
5944 return "DW_TAG_compile_unit";
5945 case DW_TAG_string_type
:
5946 return "DW_TAG_string_type";
5947 case DW_TAG_structure_type
:
5948 return "DW_TAG_structure_type";
5949 case DW_TAG_subroutine_type
:
5950 return "DW_TAG_subroutine_type";
5951 case DW_TAG_typedef
:
5952 return "DW_TAG_typedef";
5953 case DW_TAG_union_type
:
5954 return "DW_TAG_union_type";
5955 case DW_TAG_unspecified_parameters
:
5956 return "DW_TAG_unspecified_parameters";
5957 case DW_TAG_variant
:
5958 return "DW_TAG_variant";
5959 case DW_TAG_common_block
:
5960 return "DW_TAG_common_block";
5961 case DW_TAG_common_inclusion
:
5962 return "DW_TAG_common_inclusion";
5963 case DW_TAG_inheritance
:
5964 return "DW_TAG_inheritance";
5965 case DW_TAG_inlined_subroutine
:
5966 return "DW_TAG_inlined_subroutine";
5968 return "DW_TAG_module";
5969 case DW_TAG_ptr_to_member_type
:
5970 return "DW_TAG_ptr_to_member_type";
5971 case DW_TAG_set_type
:
5972 return "DW_TAG_set_type";
5973 case DW_TAG_subrange_type
:
5974 return "DW_TAG_subrange_type";
5975 case DW_TAG_with_stmt
:
5976 return "DW_TAG_with_stmt";
5977 case DW_TAG_access_declaration
:
5978 return "DW_TAG_access_declaration";
5979 case DW_TAG_base_type
:
5980 return "DW_TAG_base_type";
5981 case DW_TAG_catch_block
:
5982 return "DW_TAG_catch_block";
5983 case DW_TAG_const_type
:
5984 return "DW_TAG_const_type";
5985 case DW_TAG_constant
:
5986 return "DW_TAG_constant";
5987 case DW_TAG_enumerator
:
5988 return "DW_TAG_enumerator";
5989 case DW_TAG_file_type
:
5990 return "DW_TAG_file_type";
5992 return "DW_TAG_friend";
5993 case DW_TAG_namelist
:
5994 return "DW_TAG_namelist";
5995 case DW_TAG_namelist_item
:
5996 return "DW_TAG_namelist_item";
5997 case DW_TAG_packed_type
:
5998 return "DW_TAG_packed_type";
5999 case DW_TAG_subprogram
:
6000 return "DW_TAG_subprogram";
6001 case DW_TAG_template_type_param
:
6002 return "DW_TAG_template_type_param";
6003 case DW_TAG_template_value_param
:
6004 return "DW_TAG_template_value_param";
6005 case DW_TAG_thrown_type
:
6006 return "DW_TAG_thrown_type";
6007 case DW_TAG_try_block
:
6008 return "DW_TAG_try_block";
6009 case DW_TAG_variant_part
:
6010 return "DW_TAG_variant_part";
6011 case DW_TAG_variable
:
6012 return "DW_TAG_variable";
6013 case DW_TAG_volatile_type
:
6014 return "DW_TAG_volatile_type";
6015 case DW_TAG_dwarf_procedure
:
6016 return "DW_TAG_dwarf_procedure";
6017 case DW_TAG_restrict_type
:
6018 return "DW_TAG_restrict_type";
6019 case DW_TAG_interface_type
:
6020 return "DW_TAG_interface_type";
6021 case DW_TAG_namespace
:
6022 return "DW_TAG_namespace";
6023 case DW_TAG_imported_module
:
6024 return "DW_TAG_imported_module";
6025 case DW_TAG_unspecified_type
:
6026 return "DW_TAG_unspecified_type";
6027 case DW_TAG_partial_unit
:
6028 return "DW_TAG_partial_unit";
6029 case DW_TAG_imported_unit
:
6030 return "DW_TAG_imported_unit";
6031 case DW_TAG_MIPS_loop
:
6032 return "DW_TAG_MIPS_loop";
6033 case DW_TAG_format_label
:
6034 return "DW_TAG_format_label";
6035 case DW_TAG_function_template
:
6036 return "DW_TAG_function_template";
6037 case DW_TAG_class_template
:
6038 return "DW_TAG_class_template";
6040 return "DW_TAG_<unknown>";
6044 /* Convert a DWARF attribute code into its string name. */
6047 dwarf_attr_name (register unsigned attr
)
6052 return "DW_AT_sibling";
6053 case DW_AT_location
:
6054 return "DW_AT_location";
6056 return "DW_AT_name";
6057 case DW_AT_ordering
:
6058 return "DW_AT_ordering";
6059 case DW_AT_subscr_data
:
6060 return "DW_AT_subscr_data";
6061 case DW_AT_byte_size
:
6062 return "DW_AT_byte_size";
6063 case DW_AT_bit_offset
:
6064 return "DW_AT_bit_offset";
6065 case DW_AT_bit_size
:
6066 return "DW_AT_bit_size";
6067 case DW_AT_element_list
:
6068 return "DW_AT_element_list";
6069 case DW_AT_stmt_list
:
6070 return "DW_AT_stmt_list";
6072 return "DW_AT_low_pc";
6074 return "DW_AT_high_pc";
6075 case DW_AT_language
:
6076 return "DW_AT_language";
6078 return "DW_AT_member";
6080 return "DW_AT_discr";
6081 case DW_AT_discr_value
:
6082 return "DW_AT_discr_value";
6083 case DW_AT_visibility
:
6084 return "DW_AT_visibility";
6086 return "DW_AT_import";
6087 case DW_AT_string_length
:
6088 return "DW_AT_string_length";
6089 case DW_AT_common_reference
:
6090 return "DW_AT_common_reference";
6091 case DW_AT_comp_dir
:
6092 return "DW_AT_comp_dir";
6093 case DW_AT_const_value
:
6094 return "DW_AT_const_value";
6095 case DW_AT_containing_type
:
6096 return "DW_AT_containing_type";
6097 case DW_AT_default_value
:
6098 return "DW_AT_default_value";
6100 return "DW_AT_inline";
6101 case DW_AT_is_optional
:
6102 return "DW_AT_is_optional";
6103 case DW_AT_lower_bound
:
6104 return "DW_AT_lower_bound";
6105 case DW_AT_producer
:
6106 return "DW_AT_producer";
6107 case DW_AT_prototyped
:
6108 return "DW_AT_prototyped";
6109 case DW_AT_return_addr
:
6110 return "DW_AT_return_addr";
6111 case DW_AT_start_scope
:
6112 return "DW_AT_start_scope";
6113 case DW_AT_stride_size
:
6114 return "DW_AT_stride_size";
6115 case DW_AT_upper_bound
:
6116 return "DW_AT_upper_bound";
6117 case DW_AT_abstract_origin
:
6118 return "DW_AT_abstract_origin";
6119 case DW_AT_accessibility
:
6120 return "DW_AT_accessibility";
6121 case DW_AT_address_class
:
6122 return "DW_AT_address_class";
6123 case DW_AT_artificial
:
6124 return "DW_AT_artificial";
6125 case DW_AT_base_types
:
6126 return "DW_AT_base_types";
6127 case DW_AT_calling_convention
:
6128 return "DW_AT_calling_convention";
6130 return "DW_AT_count";
6131 case DW_AT_data_member_location
:
6132 return "DW_AT_data_member_location";
6133 case DW_AT_decl_column
:
6134 return "DW_AT_decl_column";
6135 case DW_AT_decl_file
:
6136 return "DW_AT_decl_file";
6137 case DW_AT_decl_line
:
6138 return "DW_AT_decl_line";
6139 case DW_AT_declaration
:
6140 return "DW_AT_declaration";
6141 case DW_AT_discr_list
:
6142 return "DW_AT_discr_list";
6143 case DW_AT_encoding
:
6144 return "DW_AT_encoding";
6145 case DW_AT_external
:
6146 return "DW_AT_external";
6147 case DW_AT_frame_base
:
6148 return "DW_AT_frame_base";
6150 return "DW_AT_friend";
6151 case DW_AT_identifier_case
:
6152 return "DW_AT_identifier_case";
6153 case DW_AT_macro_info
:
6154 return "DW_AT_macro_info";
6155 case DW_AT_namelist_items
:
6156 return "DW_AT_namelist_items";
6157 case DW_AT_priority
:
6158 return "DW_AT_priority";
6160 return "DW_AT_segment";
6161 case DW_AT_specification
:
6162 return "DW_AT_specification";
6163 case DW_AT_static_link
:
6164 return "DW_AT_static_link";
6166 return "DW_AT_type";
6167 case DW_AT_use_location
:
6168 return "DW_AT_use_location";
6169 case DW_AT_variable_parameter
:
6170 return "DW_AT_variable_parameter";
6171 case DW_AT_virtuality
:
6172 return "DW_AT_virtuality";
6173 case DW_AT_vtable_elem_location
:
6174 return "DW_AT_vtable_elem_location";
6175 case DW_AT_allocated
:
6176 return "DW_AT_allocated";
6177 case DW_AT_associated
:
6178 return "DW_AT_associated";
6179 case DW_AT_data_location
:
6180 return "DW_AT_data_location";
6182 return "DW_AT_stride";
6183 case DW_AT_entry_pc
:
6184 return "DW_AT_entry_pc";
6185 case DW_AT_use_UTF8
:
6186 return "DW_AT_use_UTF8";
6187 case DW_AT_extension
:
6188 return "DW_AT_extension";
6190 return "DW_AT_ranges";
6191 case DW_AT_trampoline
:
6192 return "DW_AT_trampoline";
6193 case DW_AT_call_column
:
6194 return "DW_AT_call_column";
6195 case DW_AT_call_file
:
6196 return "DW_AT_call_file";
6197 case DW_AT_call_line
:
6198 return "DW_AT_call_line";
6200 case DW_AT_MIPS_fde
:
6201 return "DW_AT_MIPS_fde";
6202 case DW_AT_MIPS_loop_begin
:
6203 return "DW_AT_MIPS_loop_begin";
6204 case DW_AT_MIPS_tail_loop_begin
:
6205 return "DW_AT_MIPS_tail_loop_begin";
6206 case DW_AT_MIPS_epilog_begin
:
6207 return "DW_AT_MIPS_epilog_begin";
6208 case DW_AT_MIPS_loop_unroll_factor
:
6209 return "DW_AT_MIPS_loop_unroll_factor";
6210 case DW_AT_MIPS_software_pipeline_depth
:
6211 return "DW_AT_MIPS_software_pipeline_depth";
6213 case DW_AT_MIPS_linkage_name
:
6214 return "DW_AT_MIPS_linkage_name";
6216 case DW_AT_sf_names
:
6217 return "DW_AT_sf_names";
6218 case DW_AT_src_info
:
6219 return "DW_AT_src_info";
6220 case DW_AT_mac_info
:
6221 return "DW_AT_mac_info";
6222 case DW_AT_src_coords
:
6223 return "DW_AT_src_coords";
6224 case DW_AT_body_begin
:
6225 return "DW_AT_body_begin";
6226 case DW_AT_body_end
:
6227 return "DW_AT_body_end";
6228 case DW_AT_GNU_vector
:
6229 return "DW_AT_GNU_vector";
6231 return "DW_AT_<unknown>";
6235 /* Convert a DWARF value form code into its string name. */
6238 dwarf_form_name (register unsigned form
)
6243 return "DW_FORM_addr";
6244 case DW_FORM_block2
:
6245 return "DW_FORM_block2";
6246 case DW_FORM_block4
:
6247 return "DW_FORM_block4";
6249 return "DW_FORM_data2";
6251 return "DW_FORM_data4";
6253 return "DW_FORM_data8";
6254 case DW_FORM_string
:
6255 return "DW_FORM_string";
6257 return "DW_FORM_block";
6258 case DW_FORM_block1
:
6259 return "DW_FORM_block1";
6261 return "DW_FORM_data1";
6263 return "DW_FORM_flag";
6265 return "DW_FORM_sdata";
6267 return "DW_FORM_strp";
6269 return "DW_FORM_udata";
6270 case DW_FORM_ref_addr
:
6271 return "DW_FORM_ref_addr";
6273 return "DW_FORM_ref1";
6275 return "DW_FORM_ref2";
6277 return "DW_FORM_ref4";
6279 return "DW_FORM_ref8";
6280 case DW_FORM_ref_udata
:
6281 return "DW_FORM_ref_udata";
6282 case DW_FORM_indirect
:
6283 return "DW_FORM_indirect";
6285 return "DW_FORM_<unknown>";
6289 /* Convert a DWARF stack opcode into its string name. */
6292 dwarf_stack_op_name (register unsigned op
)
6297 return "DW_OP_addr";
6299 return "DW_OP_deref";
6301 return "DW_OP_const1u";
6303 return "DW_OP_const1s";
6305 return "DW_OP_const2u";
6307 return "DW_OP_const2s";
6309 return "DW_OP_const4u";
6311 return "DW_OP_const4s";
6313 return "DW_OP_const8u";
6315 return "DW_OP_const8s";
6317 return "DW_OP_constu";
6319 return "DW_OP_consts";
6323 return "DW_OP_drop";
6325 return "DW_OP_over";
6327 return "DW_OP_pick";
6329 return "DW_OP_swap";
6333 return "DW_OP_xderef";
6341 return "DW_OP_minus";
6353 return "DW_OP_plus";
6354 case DW_OP_plus_uconst
:
6355 return "DW_OP_plus_uconst";
6361 return "DW_OP_shra";
6379 return "DW_OP_skip";
6381 return "DW_OP_lit0";
6383 return "DW_OP_lit1";
6385 return "DW_OP_lit2";
6387 return "DW_OP_lit3";
6389 return "DW_OP_lit4";
6391 return "DW_OP_lit5";
6393 return "DW_OP_lit6";
6395 return "DW_OP_lit7";
6397 return "DW_OP_lit8";
6399 return "DW_OP_lit9";
6401 return "DW_OP_lit10";
6403 return "DW_OP_lit11";
6405 return "DW_OP_lit12";
6407 return "DW_OP_lit13";
6409 return "DW_OP_lit14";
6411 return "DW_OP_lit15";
6413 return "DW_OP_lit16";
6415 return "DW_OP_lit17";
6417 return "DW_OP_lit18";
6419 return "DW_OP_lit19";
6421 return "DW_OP_lit20";
6423 return "DW_OP_lit21";
6425 return "DW_OP_lit22";
6427 return "DW_OP_lit23";
6429 return "DW_OP_lit24";
6431 return "DW_OP_lit25";
6433 return "DW_OP_lit26";
6435 return "DW_OP_lit27";
6437 return "DW_OP_lit28";
6439 return "DW_OP_lit29";
6441 return "DW_OP_lit30";
6443 return "DW_OP_lit31";
6445 return "DW_OP_reg0";
6447 return "DW_OP_reg1";
6449 return "DW_OP_reg2";
6451 return "DW_OP_reg3";
6453 return "DW_OP_reg4";
6455 return "DW_OP_reg5";
6457 return "DW_OP_reg6";
6459 return "DW_OP_reg7";
6461 return "DW_OP_reg8";
6463 return "DW_OP_reg9";
6465 return "DW_OP_reg10";
6467 return "DW_OP_reg11";
6469 return "DW_OP_reg12";
6471 return "DW_OP_reg13";
6473 return "DW_OP_reg14";
6475 return "DW_OP_reg15";
6477 return "DW_OP_reg16";
6479 return "DW_OP_reg17";
6481 return "DW_OP_reg18";
6483 return "DW_OP_reg19";
6485 return "DW_OP_reg20";
6487 return "DW_OP_reg21";
6489 return "DW_OP_reg22";
6491 return "DW_OP_reg23";
6493 return "DW_OP_reg24";
6495 return "DW_OP_reg25";
6497 return "DW_OP_reg26";
6499 return "DW_OP_reg27";
6501 return "DW_OP_reg28";
6503 return "DW_OP_reg29";
6505 return "DW_OP_reg30";
6507 return "DW_OP_reg31";
6509 return "DW_OP_breg0";
6511 return "DW_OP_breg1";
6513 return "DW_OP_breg2";
6515 return "DW_OP_breg3";
6517 return "DW_OP_breg4";
6519 return "DW_OP_breg5";
6521 return "DW_OP_breg6";
6523 return "DW_OP_breg7";
6525 return "DW_OP_breg8";
6527 return "DW_OP_breg9";
6529 return "DW_OP_breg10";
6531 return "DW_OP_breg11";
6533 return "DW_OP_breg12";
6535 return "DW_OP_breg13";
6537 return "DW_OP_breg14";
6539 return "DW_OP_breg15";
6541 return "DW_OP_breg16";
6543 return "DW_OP_breg17";
6545 return "DW_OP_breg18";
6547 return "DW_OP_breg19";
6549 return "DW_OP_breg20";
6551 return "DW_OP_breg21";
6553 return "DW_OP_breg22";
6555 return "DW_OP_breg23";
6557 return "DW_OP_breg24";
6559 return "DW_OP_breg25";
6561 return "DW_OP_breg26";
6563 return "DW_OP_breg27";
6565 return "DW_OP_breg28";
6567 return "DW_OP_breg29";
6569 return "DW_OP_breg30";
6571 return "DW_OP_breg31";
6573 return "DW_OP_regx";
6575 return "DW_OP_fbreg";
6577 return "DW_OP_bregx";
6579 return "DW_OP_piece";
6580 case DW_OP_deref_size
:
6581 return "DW_OP_deref_size";
6582 case DW_OP_xderef_size
:
6583 return "DW_OP_xderef_size";
6586 /* DWARF 3 extensions. */
6587 case DW_OP_push_object_address
:
6588 return "DW_OP_push_object_address";
6590 return "DW_OP_call2";
6592 return "DW_OP_call4";
6593 case DW_OP_call_ref
:
6594 return "DW_OP_call_ref";
6595 /* GNU extensions. */
6596 case DW_OP_GNU_push_tls_address
:
6597 return "DW_OP_GNU_push_tls_address";
6599 return "OP_<unknown>";
6604 dwarf_bool_name (unsigned mybool
)
6612 /* Convert a DWARF type code into its string name. */
6615 dwarf_type_encoding_name (register unsigned enc
)
6619 case DW_ATE_address
:
6620 return "DW_ATE_address";
6621 case DW_ATE_boolean
:
6622 return "DW_ATE_boolean";
6623 case DW_ATE_complex_float
:
6624 return "DW_ATE_complex_float";
6626 return "DW_ATE_float";
6628 return "DW_ATE_signed";
6629 case DW_ATE_signed_char
:
6630 return "DW_ATE_signed_char";
6631 case DW_ATE_unsigned
:
6632 return "DW_ATE_unsigned";
6633 case DW_ATE_unsigned_char
:
6634 return "DW_ATE_unsigned_char";
6635 case DW_ATE_imaginary_float
:
6636 return "DW_ATE_imaginary_float";
6638 return "DW_ATE_<unknown>";
6642 /* Convert a DWARF call frame info operation to its string name. */
6646 dwarf_cfi_name (register unsigned cfi_opc
)
6650 case DW_CFA_advance_loc
:
6651 return "DW_CFA_advance_loc";
6653 return "DW_CFA_offset";
6654 case DW_CFA_restore
:
6655 return "DW_CFA_restore";
6657 return "DW_CFA_nop";
6658 case DW_CFA_set_loc
:
6659 return "DW_CFA_set_loc";
6660 case DW_CFA_advance_loc1
:
6661 return "DW_CFA_advance_loc1";
6662 case DW_CFA_advance_loc2
:
6663 return "DW_CFA_advance_loc2";
6664 case DW_CFA_advance_loc4
:
6665 return "DW_CFA_advance_loc4";
6666 case DW_CFA_offset_extended
:
6667 return "DW_CFA_offset_extended";
6668 case DW_CFA_restore_extended
:
6669 return "DW_CFA_restore_extended";
6670 case DW_CFA_undefined
:
6671 return "DW_CFA_undefined";
6672 case DW_CFA_same_value
:
6673 return "DW_CFA_same_value";
6674 case DW_CFA_register
:
6675 return "DW_CFA_register";
6676 case DW_CFA_remember_state
:
6677 return "DW_CFA_remember_state";
6678 case DW_CFA_restore_state
:
6679 return "DW_CFA_restore_state";
6680 case DW_CFA_def_cfa
:
6681 return "DW_CFA_def_cfa";
6682 case DW_CFA_def_cfa_register
:
6683 return "DW_CFA_def_cfa_register";
6684 case DW_CFA_def_cfa_offset
:
6685 return "DW_CFA_def_cfa_offset";
6688 case DW_CFA_def_cfa_expression
:
6689 return "DW_CFA_def_cfa_expression";
6690 case DW_CFA_expression
:
6691 return "DW_CFA_expression";
6692 case DW_CFA_offset_extended_sf
:
6693 return "DW_CFA_offset_extended_sf";
6694 case DW_CFA_def_cfa_sf
:
6695 return "DW_CFA_def_cfa_sf";
6696 case DW_CFA_def_cfa_offset_sf
:
6697 return "DW_CFA_def_cfa_offset_sf";
6699 /* SGI/MIPS specific */
6700 case DW_CFA_MIPS_advance_loc8
:
6701 return "DW_CFA_MIPS_advance_loc8";
6703 /* GNU extensions */
6704 case DW_CFA_GNU_window_save
:
6705 return "DW_CFA_GNU_window_save";
6706 case DW_CFA_GNU_args_size
:
6707 return "DW_CFA_GNU_args_size";
6708 case DW_CFA_GNU_negative_offset_extended
:
6709 return "DW_CFA_GNU_negative_offset_extended";
6712 return "DW_CFA_<unknown>";
6718 dump_die (struct die_info
*die
)
6722 fprintf_unfiltered (gdb_stderr
, "Die: %s (abbrev = %d, offset = %d)\n",
6723 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
6724 fprintf_unfiltered (gdb_stderr
, "\thas children: %s\n",
6725 dwarf_bool_name (die
->has_children
));
6727 fprintf_unfiltered (gdb_stderr
, "\tattributes:\n");
6728 for (i
= 0; i
< die
->num_attrs
; ++i
)
6730 fprintf_unfiltered (gdb_stderr
, "\t\t%s (%s) ",
6731 dwarf_attr_name (die
->attrs
[i
].name
),
6732 dwarf_form_name (die
->attrs
[i
].form
));
6733 switch (die
->attrs
[i
].form
)
6735 case DW_FORM_ref_addr
:
6737 fprintf_unfiltered (gdb_stderr
, "address: ");
6738 print_address_numeric (DW_ADDR (&die
->attrs
[i
]), 1, gdb_stderr
);
6740 case DW_FORM_block2
:
6741 case DW_FORM_block4
:
6743 case DW_FORM_block1
:
6744 fprintf_unfiltered (gdb_stderr
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
6755 fprintf_unfiltered (gdb_stderr
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
6757 case DW_FORM_string
:
6759 fprintf_unfiltered (gdb_stderr
, "string: \"%s\"",
6760 DW_STRING (&die
->attrs
[i
])
6761 ? DW_STRING (&die
->attrs
[i
]) : "");
6764 if (DW_UNSND (&die
->attrs
[i
]))
6765 fprintf_unfiltered (gdb_stderr
, "flag: TRUE");
6767 fprintf_unfiltered (gdb_stderr
, "flag: FALSE");
6769 case DW_FORM_indirect
:
6770 /* the reader will have reduced the indirect form to
6771 the "base form" so this form should not occur */
6772 fprintf_unfiltered (gdb_stderr
, "unexpected attribute form: DW_FORM_indirect");
6775 fprintf_unfiltered (gdb_stderr
, "unsupported attribute form: %d.",
6776 die
->attrs
[i
].form
);
6778 fprintf_unfiltered (gdb_stderr
, "\n");
6783 dump_die_list (struct die_info
*die
)
6793 store_in_ref_table (unsigned int offset
, struct die_info
*die
)
6796 struct die_info
*old
;
6798 h
= (offset
% REF_HASH_SIZE
);
6799 old
= die_ref_table
[h
];
6800 die
->next_ref
= old
;
6801 die_ref_table
[h
] = die
;
6806 dwarf2_empty_hash_tables (void)
6808 memset (die_ref_table
, 0, sizeof (die_ref_table
));
6812 dwarf2_get_ref_die_offset (struct attribute
*attr
)
6814 unsigned int result
= 0;
6818 case DW_FORM_ref_addr
:
6819 result
= DW_ADDR (attr
);
6825 case DW_FORM_ref_udata
:
6826 result
= cu_header_offset
+ DW_UNSND (attr
);
6829 complaint (&symfile_complaints
,
6830 "unsupported die ref attribute form: '%s'",
6831 dwarf_form_name (attr
->form
));
6836 static struct die_info
*
6837 follow_die_ref (unsigned int offset
)
6839 struct die_info
*die
;
6842 h
= (offset
% REF_HASH_SIZE
);
6843 die
= die_ref_table
[h
];
6846 if (die
->offset
== offset
)
6850 die
= die
->next_ref
;
6855 static struct type
*
6856 dwarf2_fundamental_type (struct objfile
*objfile
, int typeid)
6858 if (typeid < 0 || typeid >= FT_NUM_MEMBERS
)
6860 error ("Dwarf Error: internal error - invalid fundamental type id %d [in module %s]",
6861 typeid, objfile
->name
);
6864 /* Look for this particular type in the fundamental type vector. If
6865 one is not found, create and install one appropriate for the
6866 current language and the current target machine. */
6868 if (ftypes
[typeid] == NULL
)
6870 ftypes
[typeid] = cu_language_defn
->la_fund_type (objfile
, typeid);
6873 return (ftypes
[typeid]);
6876 /* Decode simple location descriptions.
6877 Given a pointer to a dwarf block that defines a location, compute
6878 the location and return the value.
6880 FIXME: This is a kludge until we figure out a better
6881 way to handle the location descriptions.
6882 Gdb's design does not mesh well with the DWARF2 notion of a location
6883 computing interpreter, which is a shame because the flexibility goes unused.
6884 FIXME: Implement more operations as necessary.
6886 A location description containing no operations indicates that the
6887 object is optimized out. The global optimized_out flag is set for
6888 those, the return value is meaningless.
6890 When the result is a register number, the global isreg flag is set,
6891 otherwise it is cleared.
6893 When the result is a base register offset, the global offreg flag is set
6894 and the register number is returned in basereg, otherwise it is cleared.
6896 When the DW_OP_fbreg operation is encountered without a corresponding
6897 DW_AT_frame_base attribute, the global islocal flag is set.
6898 Hopefully the machine dependent code knows how to set up a virtual
6899 frame pointer for the local references.
6901 Note that stack[0] is unused except as a default error return.
6902 Note that stack overflow is not yet handled. */
6905 decode_locdesc (struct dwarf_block
*blk
, struct objfile
*objfile
,
6906 const struct comp_unit_head
*cu_header
)
6909 int size
= blk
->size
;
6910 char *data
= blk
->data
;
6911 CORE_ADDR stack
[64];
6913 unsigned int bytes_read
, unsnd
;
6963 stack
[++stacki
] = op
- DW_OP_lit0
;
6999 stack
[++stacki
] = op
- DW_OP_reg0
;
7004 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
7006 stack
[++stacki
] = unsnd
;
7042 basereg
= op
- DW_OP_breg0
;
7043 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
7049 basereg
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
7051 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
7056 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
7058 if (frame_base_reg
>= 0)
7061 basereg
= frame_base_reg
;
7062 stack
[stacki
] += frame_base_offset
;
7066 complaint (&symfile_complaints
,
7067 "DW_AT_frame_base missing for DW_OP_fbreg");
7073 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
7074 cu_header
, &bytes_read
);
7079 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
7084 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
7089 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
7094 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
7099 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
7104 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
7109 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
7115 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
7120 stack
[stacki
+ 1] = stack
[stacki
];
7125 stack
[stacki
- 1] += stack
[stacki
];
7129 case DW_OP_plus_uconst
:
7130 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
7135 stack
[stacki
- 1] -= stack
[stacki
];
7141 /* If we're not the last op, then we definitely can't encode
7142 this using GDB's address_class enum. */
7144 dwarf2_complex_location_expr_complaint ();
7147 case DW_OP_GNU_push_tls_address
:
7148 /* The top of the stack has the offset from the beginning
7149 of the thread control block at which the variable is located. */
7150 /* Nothing should follow this operator, so the top of stack would
7153 dwarf2_complex_location_expr_complaint ();
7157 complaint (&symfile_complaints
, "unsupported stack op: '%s'",
7158 dwarf_stack_op_name (op
));
7159 return (stack
[stacki
]);
7162 return (stack
[stacki
]);
7165 /* memory allocation interface */
7169 dwarf2_free_tmp_obstack (void *ignore
)
7171 obstack_free (&dwarf2_tmp_obstack
, NULL
);
7174 static struct dwarf_block
*
7175 dwarf_alloc_block (void)
7177 struct dwarf_block
*blk
;
7179 blk
= (struct dwarf_block
*)
7180 obstack_alloc (&dwarf2_tmp_obstack
, sizeof (struct dwarf_block
));
7184 static struct abbrev_info
*
7185 dwarf_alloc_abbrev (void)
7187 struct abbrev_info
*abbrev
;
7189 abbrev
= (struct abbrev_info
*) xmalloc (sizeof (struct abbrev_info
));
7190 memset (abbrev
, 0, sizeof (struct abbrev_info
));
7194 static struct die_info
*
7195 dwarf_alloc_die (void)
7197 struct die_info
*die
;
7199 die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
7200 memset (die
, 0, sizeof (struct die_info
));
7205 /* Macro support. */
7208 /* Return the full name of file number I in *LH's file name table.
7209 Use COMP_DIR as the name of the current directory of the
7210 compilation. The result is allocated using xmalloc; the caller is
7211 responsible for freeing it. */
7213 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
7215 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
7217 if (IS_ABSOLUTE_PATH (fe
->name
))
7218 return xstrdup (fe
->name
);
7226 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7232 dir_len
= strlen (dir
);
7233 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
7234 strcpy (full_name
, dir
);
7235 full_name
[dir_len
] = '/';
7236 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
7240 return xstrdup (fe
->name
);
7245 static struct macro_source_file
*
7246 macro_start_file (int file
, int line
,
7247 struct macro_source_file
*current_file
,
7248 const char *comp_dir
,
7249 struct line_header
*lh
, struct objfile
*objfile
)
7251 /* The full name of this source file. */
7252 char *full_name
= file_full_name (file
, lh
, comp_dir
);
7254 /* We don't create a macro table for this compilation unit
7255 at all until we actually get a filename. */
7256 if (! pending_macros
)
7257 pending_macros
= new_macro_table (&objfile
->symbol_obstack
,
7258 objfile
->macro_cache
);
7261 /* If we have no current file, then this must be the start_file
7262 directive for the compilation unit's main source file. */
7263 current_file
= macro_set_main (pending_macros
, full_name
);
7265 current_file
= macro_include (current_file
, line
, full_name
);
7269 return current_file
;
7273 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
7274 followed by a null byte. */
7276 copy_string (const char *buf
, int len
)
7278 char *s
= xmalloc (len
+ 1);
7279 memcpy (s
, buf
, len
);
7287 consume_improper_spaces (const char *p
, const char *body
)
7291 complaint (&symfile_complaints
,
7292 "macro definition contains spaces in formal argument list:\n`%s'",
7304 parse_macro_definition (struct macro_source_file
*file
, int line
,
7309 /* The body string takes one of two forms. For object-like macro
7310 definitions, it should be:
7312 <macro name> " " <definition>
7314 For function-like macro definitions, it should be:
7316 <macro name> "() " <definition>
7318 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
7320 Spaces may appear only where explicitly indicated, and in the
7323 The Dwarf 2 spec says that an object-like macro's name is always
7324 followed by a space, but versions of GCC around March 2002 omit
7325 the space when the macro's definition is the empty string.
7327 The Dwarf 2 spec says that there should be no spaces between the
7328 formal arguments in a function-like macro's formal argument list,
7329 but versions of GCC around March 2002 include spaces after the
7333 /* Find the extent of the macro name. The macro name is terminated
7334 by either a space or null character (for an object-like macro) or
7335 an opening paren (for a function-like macro). */
7336 for (p
= body
; *p
; p
++)
7337 if (*p
== ' ' || *p
== '(')
7340 if (*p
== ' ' || *p
== '\0')
7342 /* It's an object-like macro. */
7343 int name_len
= p
- body
;
7344 char *name
= copy_string (body
, name_len
);
7345 const char *replacement
;
7348 replacement
= body
+ name_len
+ 1;
7351 dwarf2_macro_malformed_definition_complaint (body
);
7352 replacement
= body
+ name_len
;
7355 macro_define_object (file
, line
, name
, replacement
);
7361 /* It's a function-like macro. */
7362 char *name
= copy_string (body
, p
- body
);
7365 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
7369 p
= consume_improper_spaces (p
, body
);
7371 /* Parse the formal argument list. */
7372 while (*p
&& *p
!= ')')
7374 /* Find the extent of the current argument name. */
7375 const char *arg_start
= p
;
7377 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
7380 if (! *p
|| p
== arg_start
)
7381 dwarf2_macro_malformed_definition_complaint (body
);
7384 /* Make sure argv has room for the new argument. */
7385 if (argc
>= argv_size
)
7388 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
7391 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
7394 p
= consume_improper_spaces (p
, body
);
7396 /* Consume the comma, if present. */
7401 p
= consume_improper_spaces (p
, body
);
7410 /* Perfectly formed definition, no complaints. */
7411 macro_define_function (file
, line
, name
,
7412 argc
, (const char **) argv
,
7414 else if (*p
== '\0')
7416 /* Complain, but do define it. */
7417 dwarf2_macro_malformed_definition_complaint (body
);
7418 macro_define_function (file
, line
, name
,
7419 argc
, (const char **) argv
,
7423 /* Just complain. */
7424 dwarf2_macro_malformed_definition_complaint (body
);
7427 /* Just complain. */
7428 dwarf2_macro_malformed_definition_complaint (body
);
7434 for (i
= 0; i
< argc
; i
++)
7440 dwarf2_macro_malformed_definition_complaint (body
);
7445 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
7446 char *comp_dir
, bfd
*abfd
,
7447 const struct comp_unit_head
*cu_header
,
7448 struct objfile
*objfile
)
7450 char *mac_ptr
, *mac_end
;
7451 struct macro_source_file
*current_file
= 0;
7453 if (dwarf_macinfo_buffer
== NULL
)
7455 complaint (&symfile_complaints
, "missing .debug_macinfo section");
7459 mac_ptr
= dwarf_macinfo_buffer
+ offset
;
7460 mac_end
= dwarf_macinfo_buffer
+ dwarf_macinfo_size
;
7464 enum dwarf_macinfo_record_type macinfo_type
;
7466 /* Do we at least have room for a macinfo type byte? */
7467 if (mac_ptr
>= mac_end
)
7469 dwarf2_macros_too_long_complaint ();
7473 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
7476 switch (macinfo_type
)
7478 /* A zero macinfo type indicates the end of the macro
7483 case DW_MACINFO_define
:
7484 case DW_MACINFO_undef
:
7490 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
7491 mac_ptr
+= bytes_read
;
7492 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
7493 mac_ptr
+= bytes_read
;
7496 complaint (&symfile_complaints
,
7497 "debug info gives macro %s outside of any file: %s",
7499 DW_MACINFO_define
? "definition" : macinfo_type
==
7500 DW_MACINFO_undef
? "undefinition" :
7501 "something-or-other", body
);
7504 if (macinfo_type
== DW_MACINFO_define
)
7505 parse_macro_definition (current_file
, line
, body
);
7506 else if (macinfo_type
== DW_MACINFO_undef
)
7507 macro_undef (current_file
, line
, body
);
7512 case DW_MACINFO_start_file
:
7517 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
7518 mac_ptr
+= bytes_read
;
7519 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
7520 mac_ptr
+= bytes_read
;
7522 current_file
= macro_start_file (file
, line
,
7523 current_file
, comp_dir
,
7528 case DW_MACINFO_end_file
:
7530 complaint (&symfile_complaints
,
7531 "macro debug info has an unmatched `close_file' directive");
7534 current_file
= current_file
->included_by
;
7537 enum dwarf_macinfo_record_type next_type
;
7539 /* GCC circa March 2002 doesn't produce the zero
7540 type byte marking the end of the compilation
7541 unit. Complain if it's not there, but exit no
7544 /* Do we at least have room for a macinfo type byte? */
7545 if (mac_ptr
>= mac_end
)
7547 dwarf2_macros_too_long_complaint ();
7551 /* We don't increment mac_ptr here, so this is just
7553 next_type
= read_1_byte (abfd
, mac_ptr
);
7555 complaint (&symfile_complaints
,
7556 "no terminating 0-type entry for macros in `.debug_macinfo' section");
7563 case DW_MACINFO_vendor_ext
:
7569 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
7570 mac_ptr
+= bytes_read
;
7571 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
7572 mac_ptr
+= bytes_read
;
7574 /* We don't recognize any vendor extensions. */
7581 /* Check if the attribute's form is a DW_FORM_block*
7582 if so return true else false. */
7584 attr_form_is_block (struct attribute
*attr
)
7586 return (attr
== NULL
? 0 :
7587 attr
->form
== DW_FORM_block1
7588 || attr
->form
== DW_FORM_block2
7589 || attr
->form
== DW_FORM_block4
7590 || attr
->form
== DW_FORM_block
);
7594 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
7595 const struct comp_unit_head
*cu_header
,
7596 struct objfile
*objfile
)
7598 if (attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
7600 struct dwarf2_loclist_baton
*baton
;
7602 baton
= obstack_alloc (&objfile
->symbol_obstack
,
7603 sizeof (struct dwarf2_loclist_baton
));
7604 baton
->objfile
= objfile
;
7606 /* We don't know how long the location list is, but make sure we
7607 don't run off the edge of the section. */
7608 baton
->size
= dwarf_loc_size
- DW_UNSND (attr
);
7609 baton
->data
= dwarf_loc_buffer
+ DW_UNSND (attr
);
7610 baton
->base_address
= cu_header
->base_address
;
7611 if (cu_header
->base_known
== 0)
7612 complaint (&symfile_complaints
,
7613 "Location list used without specifying the CU base address.");
7615 SYMBOL_LOCATION_FUNCS (sym
) = &dwarf2_loclist_funcs
;
7616 SYMBOL_LOCATION_BATON (sym
) = baton
;
7620 struct dwarf2_locexpr_baton
*baton
;
7622 baton
= obstack_alloc (&objfile
->symbol_obstack
,
7623 sizeof (struct dwarf2_locexpr_baton
));
7624 baton
->objfile
= objfile
;
7626 if (attr_form_is_block (attr
))
7628 /* Note that we're just copying the block's data pointer
7629 here, not the actual data. We're still pointing into the
7630 dwarf_info_buffer for SYM's objfile; right now we never
7631 release that buffer, but when we do clean up properly
7632 this may need to change. */
7633 baton
->size
= DW_BLOCK (attr
)->size
;
7634 baton
->data
= DW_BLOCK (attr
)->data
;
7638 dwarf2_invalid_attrib_class_complaint ("location description",
7639 SYMBOL_NATURAL_NAME (sym
));
7644 SYMBOL_LOCATION_FUNCS (sym
) = &dwarf2_locexpr_funcs
;
7645 SYMBOL_LOCATION_BATON (sym
) = baton
;