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_renges 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
;
2330 buffer
= dwarf_ranges_buffer
+ offset
;
2332 /* Read in the largest possible address. */
2333 marker
= read_address (obfd
, buffer
, cu_header
, &dummy
);
2334 if ((marker
& mask
) == mask
)
2336 /* If we found the largest possible address, then
2337 read the base address. */
2338 base
= read_address (obfd
, buffer
+ addr_size
,
2340 buffer
+= 2 * addr_size
;
2341 offset
+= 2 * addr_size
;
2349 CORE_ADDR range_beginning
, range_end
;
2351 range_beginning
= read_address (obfd
, buffer
,
2353 buffer
+= addr_size
;
2354 range_end
= read_address (obfd
, buffer
, cu_header
, &dummy
);
2355 buffer
+= addr_size
;
2356 offset
+= 2 * addr_size
;
2358 /* An end of list marker is a pair of zero addresses. */
2359 if (range_beginning
== 0 && range_end
== 0)
2360 /* Found the end of list entry. */
2363 /* Each base address selection entry is a pair of 2 values.
2364 The first is the largest possible address, the second is
2365 the base address. Check for a base address here. */
2366 if ((range_beginning
& mask
) == mask
)
2368 /* If we found the largest possible address, then
2369 read the base address. */
2370 base
= read_address (obfd
, buffer
+ addr_size
,
2378 /* We have no valid base address for the ranges
2380 complaint (&symfile_complaints
,
2381 "Invalid .debug_ranges data (no base address)");
2385 range_beginning
+= base
;
2388 /* FIXME: This is recording everything as a low-high
2389 segment of consecutive addresses. We should have a
2390 data structure for discontiguous block ranges
2394 low
= range_beginning
;
2400 if (range_beginning
< low
)
2401 low
= range_beginning
;
2402 if (range_end
> high
)
2408 /* If the first entry is an end-of-list marker, the range
2409 describes an empty scope, i.e. no instructions. */
2419 /* When using the GNU linker, .gnu.linkonce. sections are used to
2420 eliminate duplicate copies of functions and vtables and such.
2421 The linker will arbitrarily choose one and discard the others.
2422 The AT_*_pc values for such functions refer to local labels in
2423 these sections. If the section from that file was discarded, the
2424 labels are not in the output, so the relocs get a value of 0.
2425 If this is a discarded function, mark the pc bounds as invalid,
2426 so that GDB will ignore it. */
2427 if (low
== 0 && (bfd_get_file_flags (obfd
) & HAS_RELOC
) == 0)
2435 /* Add an aggregate field to the field list. */
2438 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
2439 struct objfile
*objfile
,
2440 const struct comp_unit_head
*cu_header
)
2442 struct nextfield
*new_field
;
2443 struct attribute
*attr
;
2445 char *fieldname
= "";
2447 /* Allocate a new field list entry and link it in. */
2448 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
2449 make_cleanup (xfree
, new_field
);
2450 memset (new_field
, 0, sizeof (struct nextfield
));
2451 new_field
->next
= fip
->fields
;
2452 fip
->fields
= new_field
;
2455 /* Handle accessibility and virtuality of field.
2456 The default accessibility for members is public, the default
2457 accessibility for inheritance is private. */
2458 if (die
->tag
!= DW_TAG_inheritance
)
2459 new_field
->accessibility
= DW_ACCESS_public
;
2461 new_field
->accessibility
= DW_ACCESS_private
;
2462 new_field
->virtuality
= DW_VIRTUALITY_none
;
2464 attr
= dwarf_attr (die
, DW_AT_accessibility
);
2466 new_field
->accessibility
= DW_UNSND (attr
);
2467 if (new_field
->accessibility
!= DW_ACCESS_public
)
2468 fip
->non_public_fields
= 1;
2469 attr
= dwarf_attr (die
, DW_AT_virtuality
);
2471 new_field
->virtuality
= DW_UNSND (attr
);
2473 fp
= &new_field
->field
;
2475 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
))
2477 /* Data member other than a C++ static data member. */
2479 /* Get type of field. */
2480 fp
->type
= die_type (die
, objfile
, cu_header
);
2482 FIELD_STATIC_KIND (*fp
) = 0;
2484 /* Get bit size of field (zero if none). */
2485 attr
= dwarf_attr (die
, DW_AT_bit_size
);
2488 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
2492 FIELD_BITSIZE (*fp
) = 0;
2495 /* Get bit offset of field. */
2496 attr
= dwarf_attr (die
, DW_AT_data_member_location
);
2499 FIELD_BITPOS (*fp
) =
2500 decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
) * bits_per_byte
;
2503 FIELD_BITPOS (*fp
) = 0;
2504 attr
= dwarf_attr (die
, DW_AT_bit_offset
);
2507 if (BITS_BIG_ENDIAN
)
2509 /* For big endian bits, the DW_AT_bit_offset gives the
2510 additional bit offset from the MSB of the containing
2511 anonymous object to the MSB of the field. We don't
2512 have to do anything special since we don't need to
2513 know the size of the anonymous object. */
2514 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
2518 /* For little endian bits, compute the bit offset to the
2519 MSB of the anonymous object, subtract off the number of
2520 bits from the MSB of the field to the MSB of the
2521 object, and then subtract off the number of bits of
2522 the field itself. The result is the bit offset of
2523 the LSB of the field. */
2525 int bit_offset
= DW_UNSND (attr
);
2527 attr
= dwarf_attr (die
, DW_AT_byte_size
);
2530 /* The size of the anonymous object containing
2531 the bit field is explicit, so use the
2532 indicated size (in bytes). */
2533 anonymous_size
= DW_UNSND (attr
);
2537 /* The size of the anonymous object containing
2538 the bit field must be inferred from the type
2539 attribute of the data member containing the
2541 anonymous_size
= TYPE_LENGTH (fp
->type
);
2543 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
2544 - bit_offset
- FIELD_BITSIZE (*fp
);
2548 /* Get name of field. */
2549 attr
= dwarf_attr (die
, DW_AT_name
);
2550 if (attr
&& DW_STRING (attr
))
2551 fieldname
= DW_STRING (attr
);
2552 fp
->name
= obsavestring (fieldname
, strlen (fieldname
),
2553 &objfile
->type_obstack
);
2555 /* Change accessibility for artificial fields (e.g. virtual table
2556 pointer or virtual base class pointer) to private. */
2557 if (dwarf_attr (die
, DW_AT_artificial
))
2559 new_field
->accessibility
= DW_ACCESS_private
;
2560 fip
->non_public_fields
= 1;
2563 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
2565 /* C++ static member. */
2567 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
2568 is a declaration, but all versions of G++ as of this writing
2569 (so through at least 3.2.1) incorrectly generate
2570 DW_TAG_variable tags. */
2574 /* Get name of field. */
2575 attr
= dwarf_attr (die
, DW_AT_name
);
2576 if (attr
&& DW_STRING (attr
))
2577 fieldname
= DW_STRING (attr
);
2581 /* Get physical name. */
2582 physname
= dwarf2_linkage_name (die
);
2584 SET_FIELD_PHYSNAME (*fp
, obsavestring (physname
, strlen (physname
),
2585 &objfile
->type_obstack
));
2586 FIELD_TYPE (*fp
) = die_type (die
, objfile
, cu_header
);
2587 FIELD_NAME (*fp
) = obsavestring (fieldname
, strlen (fieldname
),
2588 &objfile
->type_obstack
);
2590 else if (die
->tag
== DW_TAG_inheritance
)
2592 /* C++ base class field. */
2593 attr
= dwarf_attr (die
, DW_AT_data_member_location
);
2595 FIELD_BITPOS (*fp
) = (decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
)
2597 FIELD_BITSIZE (*fp
) = 0;
2598 FIELD_STATIC_KIND (*fp
) = 0;
2599 FIELD_TYPE (*fp
) = die_type (die
, objfile
, cu_header
);
2600 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
2601 fip
->nbaseclasses
++;
2605 /* Create the vector of fields, and attach it to the type. */
2608 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
2609 struct objfile
*objfile
)
2611 int nfields
= fip
->nfields
;
2613 /* Record the field count, allocate space for the array of fields,
2614 and create blank accessibility bitfields if necessary. */
2615 TYPE_NFIELDS (type
) = nfields
;
2616 TYPE_FIELDS (type
) = (struct field
*)
2617 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
2618 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
2620 if (fip
->non_public_fields
)
2622 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2624 TYPE_FIELD_PRIVATE_BITS (type
) =
2625 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
2626 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
2628 TYPE_FIELD_PROTECTED_BITS (type
) =
2629 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
2630 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
2632 TYPE_FIELD_IGNORE_BITS (type
) =
2633 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
2634 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
2637 /* If the type has baseclasses, allocate and clear a bit vector for
2638 TYPE_FIELD_VIRTUAL_BITS. */
2639 if (fip
->nbaseclasses
)
2641 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
2644 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2645 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
2646 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
2647 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
2648 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
2651 /* Copy the saved-up fields into the field vector. Start from the head
2652 of the list, adding to the tail of the field array, so that they end
2653 up in the same order in the array in which they were added to the list. */
2654 while (nfields
-- > 0)
2656 TYPE_FIELD (type
, nfields
) = fip
->fields
->field
;
2657 switch (fip
->fields
->accessibility
)
2659 case DW_ACCESS_private
:
2660 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
2663 case DW_ACCESS_protected
:
2664 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
2667 case DW_ACCESS_public
:
2671 /* Unknown accessibility. Complain and treat it as public. */
2673 complaint (&symfile_complaints
, "unsupported accessibility %d",
2674 fip
->fields
->accessibility
);
2678 if (nfields
< fip
->nbaseclasses
)
2680 switch (fip
->fields
->virtuality
)
2682 case DW_VIRTUALITY_virtual
:
2683 case DW_VIRTUALITY_pure_virtual
:
2684 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
2688 fip
->fields
= fip
->fields
->next
;
2692 /* Add a member function to the proper fieldlist. */
2695 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
2696 struct type
*type
, struct objfile
*objfile
,
2697 const struct comp_unit_head
*cu_header
)
2699 struct attribute
*attr
;
2700 struct fnfieldlist
*flp
;
2702 struct fn_field
*fnp
;
2705 struct nextfnfield
*new_fnfield
;
2707 /* Get name of member function. */
2708 attr
= dwarf_attr (die
, DW_AT_name
);
2709 if (attr
&& DW_STRING (attr
))
2710 fieldname
= DW_STRING (attr
);
2714 /* Get the mangled name. */
2715 physname
= dwarf2_linkage_name (die
);
2717 /* Look up member function name in fieldlist. */
2718 for (i
= 0; i
< fip
->nfnfields
; i
++)
2720 if (STREQ (fip
->fnfieldlists
[i
].name
, fieldname
))
2724 /* Create new list element if necessary. */
2725 if (i
< fip
->nfnfields
)
2726 flp
= &fip
->fnfieldlists
[i
];
2729 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
2731 fip
->fnfieldlists
= (struct fnfieldlist
*)
2732 xrealloc (fip
->fnfieldlists
,
2733 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
2734 * sizeof (struct fnfieldlist
));
2735 if (fip
->nfnfields
== 0)
2736 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
2738 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
2739 flp
->name
= fieldname
;
2745 /* Create a new member function field and chain it to the field list
2747 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
2748 make_cleanup (xfree
, new_fnfield
);
2749 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
2750 new_fnfield
->next
= flp
->head
;
2751 flp
->head
= new_fnfield
;
2754 /* Fill in the member function field info. */
2755 fnp
= &new_fnfield
->fnfield
;
2756 fnp
->physname
= obsavestring (physname
, strlen (physname
),
2757 &objfile
->type_obstack
);
2758 fnp
->type
= alloc_type (objfile
);
2759 if (die
->type
&& TYPE_CODE (die
->type
) == TYPE_CODE_FUNC
)
2761 struct type
*return_type
= TYPE_TARGET_TYPE (die
->type
);
2762 int nparams
= TYPE_NFIELDS (die
->type
);
2764 /* TYPE is the domain of this method, and DIE->TYPE is the type
2765 of the method itself (TYPE_CODE_METHOD). */
2766 smash_to_method_type (fnp
->type
, type
,
2767 TYPE_TARGET_TYPE (die
->type
),
2768 TYPE_FIELDS (die
->type
),
2769 TYPE_NFIELDS (die
->type
),
2770 TYPE_VARARGS (die
->type
));
2772 /* Handle static member functions.
2773 Dwarf2 has no clean way to discern C++ static and non-static
2774 member functions. G++ helps GDB by marking the first
2775 parameter for non-static member functions (which is the
2776 this pointer) as artificial. We obtain this information
2777 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
2778 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (die
->type
, 0) == 0)
2779 fnp
->voffset
= VOFFSET_STATIC
;
2782 complaint (&symfile_complaints
, "member function type missing for '%s'",
2785 /* Get fcontext from DW_AT_containing_type if present. */
2786 if (dwarf_attr (die
, DW_AT_containing_type
) != NULL
)
2787 fnp
->fcontext
= die_containing_type (die
, objfile
, cu_header
);
2789 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
2790 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
2792 /* Get accessibility. */
2793 attr
= dwarf_attr (die
, DW_AT_accessibility
);
2796 switch (DW_UNSND (attr
))
2798 case DW_ACCESS_private
:
2799 fnp
->is_private
= 1;
2801 case DW_ACCESS_protected
:
2802 fnp
->is_protected
= 1;
2807 /* Check for artificial methods. */
2808 attr
= dwarf_attr (die
, DW_AT_artificial
);
2809 if (attr
&& DW_UNSND (attr
) != 0)
2810 fnp
->is_artificial
= 1;
2812 /* Get index in virtual function table if it is a virtual member function. */
2813 attr
= dwarf_attr (die
, DW_AT_vtable_elem_location
);
2816 /* Support the .debug_loc offsets */
2817 if (attr_form_is_block (attr
))
2819 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
) + 2;
2821 else if (attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
2823 dwarf2_complex_location_expr_complaint ();
2827 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
2833 /* Create the vector of member function fields, and attach it to the type. */
2836 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
2837 struct objfile
*objfile
)
2839 struct fnfieldlist
*flp
;
2840 int total_length
= 0;
2843 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2844 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2845 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
2847 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
2849 struct nextfnfield
*nfp
= flp
->head
;
2850 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
2853 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
2854 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
2855 fn_flp
->fn_fields
= (struct fn_field
*)
2856 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
2857 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
2858 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
2860 total_length
+= flp
->length
;
2863 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
2864 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
2867 /* Called when we find the DIE that starts a structure or union scope
2868 (definition) to process all dies that define the members of the
2871 NOTE: we need to call struct_type regardless of whether or not the
2872 DIE has an at_name attribute, since it might be an anonymous
2873 structure or union. This gets the type entered into our set of
2876 However, if the structure is incomplete (an opaque struct/union)
2877 then suppress creating a symbol table entry for it since gdb only
2878 wants to find the one with the complete definition. Note that if
2879 it is complete, we just call new_symbol, which does it's own
2880 checking about whether the struct/union is anonymous or not (and
2881 suppresses creating a symbol table entry itself). */
2884 read_structure_scope (struct die_info
*die
, struct objfile
*objfile
,
2885 const struct comp_unit_head
*cu_header
)
2888 struct attribute
*attr
;
2890 type
= alloc_type (objfile
);
2892 INIT_CPLUS_SPECIFIC (type
);
2893 attr
= dwarf_attr (die
, DW_AT_name
);
2894 if (attr
&& DW_STRING (attr
))
2896 TYPE_TAG_NAME (type
) = obsavestring (DW_STRING (attr
),
2897 strlen (DW_STRING (attr
)),
2898 &objfile
->type_obstack
);
2901 if (die
->tag
== DW_TAG_structure_type
)
2903 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
2905 else if (die
->tag
== DW_TAG_union_type
)
2907 TYPE_CODE (type
) = TYPE_CODE_UNION
;
2911 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
2913 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
2916 attr
= dwarf_attr (die
, DW_AT_byte_size
);
2919 TYPE_LENGTH (type
) = DW_UNSND (attr
);
2923 TYPE_LENGTH (type
) = 0;
2926 /* We need to add the type field to the die immediately so we don't
2927 infinitely recurse when dealing with pointers to the structure
2928 type within the structure itself. */
2931 if (die
->has_children
&& ! die_is_declaration (die
))
2933 struct field_info fi
;
2934 struct die_info
*child_die
;
2935 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
2937 memset (&fi
, 0, sizeof (struct field_info
));
2939 child_die
= die
->next
;
2941 while (child_die
&& child_die
->tag
)
2943 if (child_die
->tag
== DW_TAG_member
2944 || child_die
->tag
== DW_TAG_variable
)
2946 /* NOTE: carlton/2002-11-05: A C++ static data member
2947 should be a DW_TAG_member that is a declaration, but
2948 all versions of G++ as of this writing (so through at
2949 least 3.2.1) incorrectly generate DW_TAG_variable
2950 tags for them instead. */
2951 dwarf2_add_field (&fi
, child_die
, objfile
, cu_header
);
2953 else if (child_die
->tag
== DW_TAG_subprogram
)
2955 /* C++ member function. */
2956 process_die (child_die
, objfile
, cu_header
);
2957 dwarf2_add_member_fn (&fi
, child_die
, type
, objfile
, cu_header
);
2959 else if (child_die
->tag
== DW_TAG_inheritance
)
2961 /* C++ base class field. */
2962 dwarf2_add_field (&fi
, child_die
, objfile
, cu_header
);
2966 process_die (child_die
, objfile
, cu_header
);
2968 child_die
= sibling_die (child_die
);
2971 /* Attach fields and member functions to the type. */
2973 dwarf2_attach_fields_to_type (&fi
, type
, objfile
);
2976 dwarf2_attach_fn_fields_to_type (&fi
, type
, objfile
);
2978 /* Get the type which refers to the base class (possibly this
2979 class itself) which contains the vtable pointer for the current
2980 class from the DW_AT_containing_type attribute. */
2982 if (dwarf_attr (die
, DW_AT_containing_type
) != NULL
)
2984 struct type
*t
= die_containing_type (die
, objfile
, cu_header
);
2986 TYPE_VPTR_BASETYPE (type
) = t
;
2989 static const char vptr_name
[] =
2990 {'_', 'v', 'p', 't', 'r', '\0'};
2993 /* Our own class provides vtbl ptr. */
2994 for (i
= TYPE_NFIELDS (t
) - 1;
2995 i
>= TYPE_N_BASECLASSES (t
);
2998 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
3000 if (STREQN (fieldname
, vptr_name
, strlen (vptr_name
) - 1)
3001 && is_cplus_marker (fieldname
[strlen (vptr_name
)]))
3003 TYPE_VPTR_FIELDNO (type
) = i
;
3008 /* Complain if virtual function table field not found. */
3009 if (i
< TYPE_N_BASECLASSES (t
))
3010 complaint (&symfile_complaints
,
3011 "virtual function table pointer not found when defining class '%s'",
3012 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
3017 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
3022 new_symbol (die
, type
, objfile
, cu_header
);
3024 do_cleanups (back_to
);
3028 /* No children, must be stub. */
3029 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
3033 /* Given a pointer to a die which begins an enumeration, process all
3034 the dies that define the members of the enumeration.
3036 This will be much nicer in draft 6 of the DWARF spec when our
3037 members will be dies instead squished into the DW_AT_element_list
3040 NOTE: We reverse the order of the element list. */
3043 read_enumeration (struct die_info
*die
, struct objfile
*objfile
,
3044 const struct comp_unit_head
*cu_header
)
3046 struct die_info
*child_die
;
3048 struct field
*fields
;
3049 struct attribute
*attr
;
3052 int unsigned_enum
= 1;
3054 type
= alloc_type (objfile
);
3056 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
3057 attr
= dwarf_attr (die
, DW_AT_name
);
3058 if (attr
&& DW_STRING (attr
))
3060 TYPE_TAG_NAME (type
) = obsavestring (DW_STRING (attr
),
3061 strlen (DW_STRING (attr
)),
3062 &objfile
->type_obstack
);
3065 attr
= dwarf_attr (die
, DW_AT_byte_size
);
3068 TYPE_LENGTH (type
) = DW_UNSND (attr
);
3072 TYPE_LENGTH (type
) = 0;
3077 if (die
->has_children
)
3079 child_die
= die
->next
;
3080 while (child_die
&& child_die
->tag
)
3082 if (child_die
->tag
!= DW_TAG_enumerator
)
3084 process_die (child_die
, objfile
, cu_header
);
3088 attr
= dwarf_attr (child_die
, DW_AT_name
);
3091 sym
= new_symbol (child_die
, type
, objfile
, cu_header
);
3092 if (SYMBOL_VALUE (sym
) < 0)
3095 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
3097 fields
= (struct field
*)
3099 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
3100 * sizeof (struct field
));
3103 FIELD_NAME (fields
[num_fields
]) = DEPRECATED_SYMBOL_NAME (sym
);
3104 FIELD_TYPE (fields
[num_fields
]) = NULL
;
3105 FIELD_BITPOS (fields
[num_fields
]) = SYMBOL_VALUE (sym
);
3106 FIELD_BITSIZE (fields
[num_fields
]) = 0;
3107 FIELD_STATIC_KIND (fields
[num_fields
]) = 0;
3113 child_die
= sibling_die (child_die
);
3118 TYPE_NFIELDS (type
) = num_fields
;
3119 TYPE_FIELDS (type
) = (struct field
*)
3120 TYPE_ALLOC (type
, sizeof (struct field
) * num_fields
);
3121 memcpy (TYPE_FIELDS (type
), fields
,
3122 sizeof (struct field
) * num_fields
);
3126 TYPE_FLAGS (type
) |= TYPE_FLAG_UNSIGNED
;
3129 new_symbol (die
, type
, objfile
, cu_header
);
3132 /* Extract all information from a DW_TAG_array_type DIE and put it in
3133 the DIE's type field. For now, this only handles one dimensional
3137 read_array_type (struct die_info
*die
, struct objfile
*objfile
,
3138 const struct comp_unit_head
*cu_header
)
3140 struct die_info
*child_die
;
3141 struct type
*type
= NULL
;
3142 struct type
*element_type
, *range_type
, *index_type
;
3143 struct type
**range_types
= NULL
;
3144 struct attribute
*attr
;
3146 struct cleanup
*back_to
;
3148 /* Return if we've already decoded this type. */
3154 element_type
= die_type (die
, objfile
, cu_header
);
3156 /* Irix 6.2 native cc creates array types without children for
3157 arrays with unspecified length. */
3158 if (die
->has_children
== 0)
3160 index_type
= dwarf2_fundamental_type (objfile
, FT_INTEGER
);
3161 range_type
= create_range_type (NULL
, index_type
, 0, -1);
3162 die
->type
= create_array_type (NULL
, element_type
, range_type
);
3166 back_to
= make_cleanup (null_cleanup
, NULL
);
3167 child_die
= die
->next
;
3168 while (child_die
&& child_die
->tag
)
3170 if (child_die
->tag
== DW_TAG_subrange_type
)
3172 unsigned int low
, high
;
3174 /* Default bounds to an array with unspecified length. */
3177 if (cu_language
== language_fortran
)
3179 /* FORTRAN implies a lower bound of 1, if not given. */
3183 index_type
= die_type (child_die
, objfile
, cu_header
);
3184 attr
= dwarf_attr (child_die
, DW_AT_lower_bound
);
3187 if (attr
->form
== DW_FORM_sdata
)
3189 low
= DW_SND (attr
);
3191 else if (attr
->form
== DW_FORM_udata
3192 || attr
->form
== DW_FORM_data1
3193 || attr
->form
== DW_FORM_data2
3194 || attr
->form
== DW_FORM_data4
3195 || attr
->form
== DW_FORM_data8
)
3197 low
= DW_UNSND (attr
);
3201 dwarf2_non_const_array_bound_ignored_complaint
3202 (dwarf_form_name (attr
->form
));
3204 die
->type
= lookup_pointer_type (element_type
);
3211 attr
= dwarf_attr (child_die
, DW_AT_upper_bound
);
3214 if (attr
->form
== DW_FORM_sdata
)
3216 high
= DW_SND (attr
);
3218 else if (attr
->form
== DW_FORM_udata
3219 || attr
->form
== DW_FORM_data1
3220 || attr
->form
== DW_FORM_data2
3221 || attr
->form
== DW_FORM_data4
3222 || attr
->form
== DW_FORM_data8
)
3224 high
= DW_UNSND (attr
);
3226 else if (attr
->form
== DW_FORM_block1
)
3228 /* GCC encodes arrays with unspecified or dynamic length
3229 with a DW_FORM_block1 attribute.
3230 FIXME: GDB does not yet know how to handle dynamic
3231 arrays properly, treat them as arrays with unspecified
3237 dwarf2_non_const_array_bound_ignored_complaint
3238 (dwarf_form_name (attr
->form
));
3240 die
->type
= lookup_pointer_type (element_type
);
3248 /* Create a range type and save it for array type creation. */
3249 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
3251 range_types
= (struct type
**)
3252 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
3253 * sizeof (struct type
*));
3255 make_cleanup (free_current_contents
, &range_types
);
3257 range_types
[ndim
++] = create_range_type (NULL
, index_type
, low
, high
);
3259 child_die
= sibling_die (child_die
);
3262 /* Dwarf2 dimensions are output from left to right, create the
3263 necessary array types in backwards order. */
3264 type
= element_type
;
3266 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
3268 /* Understand Dwarf2 support for vector types (like they occur on
3269 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
3270 array type. This is not part of the Dwarf2/3 standard yet, but a
3271 custom vendor extension. The main difference between a regular
3272 array and the vector variant is that vectors are passed by value
3274 attr
= dwarf_attr (die
, DW_AT_GNU_vector
);
3276 TYPE_FLAGS (type
) |= TYPE_FLAG_VECTOR
;
3278 do_cleanups (back_to
);
3280 /* Install the type in the die. */
3284 /* First cut: install each common block member as a global variable. */
3287 read_common_block (struct die_info
*die
, struct objfile
*objfile
,
3288 const struct comp_unit_head
*cu_header
)
3290 struct die_info
*child_die
;
3291 struct attribute
*attr
;
3293 CORE_ADDR base
= (CORE_ADDR
) 0;
3295 attr
= dwarf_attr (die
, DW_AT_location
);
3298 /* Support the .debug_loc offsets */
3299 if (attr_form_is_block (attr
))
3301 base
= decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
);
3303 else if (attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
3305 dwarf2_complex_location_expr_complaint ();
3309 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
3310 "common block member");
3313 if (die
->has_children
)
3315 child_die
= die
->next
;
3316 while (child_die
&& child_die
->tag
)
3318 sym
= new_symbol (child_die
, NULL
, objfile
, cu_header
);
3319 attr
= dwarf_attr (child_die
, DW_AT_data_member_location
);
3322 SYMBOL_VALUE_ADDRESS (sym
) =
3323 base
+ decode_locdesc (DW_BLOCK (attr
), objfile
, cu_header
);
3324 add_symbol_to_list (sym
, &global_symbols
);
3326 child_die
= sibling_die (child_die
);
3331 /* Read a C++ namespace. */
3334 read_namespace (struct die_info
*die
, struct objfile
*objfile
,
3335 const struct comp_unit_head
*cu_header
)
3337 const char *previous_namespace
= processing_current_namespace
;
3338 const char *name
= NULL
;
3340 struct die_info
*current_die
;
3342 /* Loop through the extensions until we find a name. */
3344 for (current_die
= die
;
3345 current_die
!= NULL
;
3346 current_die
= dwarf2_extension (die
))
3348 name
= dwarf2_name (current_die
);
3353 /* Is it an anonymous namespace? */
3355 is_anonymous
= (name
== NULL
);
3357 name
= "(anonymous namespace)";
3359 /* Now build the name of the current namespace. */
3361 if (previous_namespace
[0] == '\0')
3363 processing_current_namespace
= name
;
3367 /* We need temp_name around because processing_current_namespace
3368 is a const char *. */
3369 char *temp_name
= alloca (strlen (previous_namespace
)
3370 + 2 + strlen(name
) + 1);
3371 strcpy (temp_name
, previous_namespace
);
3372 strcat (temp_name
, "::");
3373 strcat (temp_name
, name
);
3375 processing_current_namespace
= temp_name
;
3378 /* Add a symbol associated to this if we haven't seen the namespace
3379 before. Also, add a using directive if it's an anonymous
3382 if (dwarf2_extension (die
) == NULL
)
3386 /* FIXME: carlton/2003-06-27: Once GDB is more const-correct,
3387 this cast will hopefully become unnecessary. */
3388 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0,
3389 (char *) processing_current_namespace
,
3391 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
3393 new_symbol (die
, type
, objfile
, cu_header
);
3396 cp_add_using_directive (processing_current_namespace
,
3397 strlen (previous_namespace
),
3398 strlen (processing_current_namespace
));
3401 if (die
->has_children
)
3403 struct die_info
*child_die
= die
->next
;
3405 while (child_die
&& child_die
->tag
)
3407 process_die (child_die
, objfile
, cu_header
);
3408 child_die
= sibling_die (child_die
);
3412 processing_current_namespace
= previous_namespace
;
3415 /* Extract all information from a DW_TAG_pointer_type DIE and add to
3416 the user defined type vector. */
3419 read_tag_pointer_type (struct die_info
*die
, struct objfile
*objfile
,
3420 const struct comp_unit_head
*cu_header
)
3423 struct attribute
*attr_byte_size
;
3424 struct attribute
*attr_address_class
;
3425 int byte_size
, addr_class
;
3432 type
= lookup_pointer_type (die_type (die
, objfile
, cu_header
));
3434 attr_byte_size
= dwarf_attr (die
, DW_AT_byte_size
);
3436 byte_size
= DW_UNSND (attr_byte_size
);
3438 byte_size
= cu_header
->addr_size
;
3440 attr_address_class
= dwarf_attr (die
, DW_AT_address_class
);
3441 if (attr_address_class
)
3442 addr_class
= DW_UNSND (attr_address_class
);
3444 addr_class
= DW_ADDR_none
;
3446 /* If the pointer size or address class is different than the
3447 default, create a type variant marked as such and set the
3448 length accordingly. */
3449 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
3451 if (ADDRESS_CLASS_TYPE_FLAGS_P ())
3455 type_flags
= ADDRESS_CLASS_TYPE_FLAGS (byte_size
, addr_class
);
3456 gdb_assert ((type_flags
& ~TYPE_FLAG_ADDRESS_CLASS_ALL
) == 0);
3457 type
= make_type_with_address_space (type
, type_flags
);
3459 else if (TYPE_LENGTH (type
) != byte_size
)
3461 complaint (&symfile_complaints
, "invalid pointer size %d", byte_size
);
3464 /* Should we also complain about unhandled address classes? */
3468 TYPE_LENGTH (type
) = byte_size
;
3472 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
3473 the user defined type vector. */
3476 read_tag_ptr_to_member_type (struct die_info
*die
, struct objfile
*objfile
,
3477 const struct comp_unit_head
*cu_header
)
3480 struct type
*to_type
;
3481 struct type
*domain
;
3488 type
= alloc_type (objfile
);
3489 to_type
= die_type (die
, objfile
, cu_header
);
3490 domain
= die_containing_type (die
, objfile
, cu_header
);
3491 smash_to_member_type (type
, domain
, to_type
);
3496 /* Extract all information from a DW_TAG_reference_type DIE and add to
3497 the user defined type vector. */
3500 read_tag_reference_type (struct die_info
*die
, struct objfile
*objfile
,
3501 const struct comp_unit_head
*cu_header
)
3504 struct attribute
*attr
;
3511 type
= lookup_reference_type (die_type (die
, objfile
, cu_header
));
3512 attr
= dwarf_attr (die
, DW_AT_byte_size
);
3515 TYPE_LENGTH (type
) = DW_UNSND (attr
);
3519 TYPE_LENGTH (type
) = cu_header
->addr_size
;
3525 read_tag_const_type (struct die_info
*die
, struct objfile
*objfile
,
3526 const struct comp_unit_head
*cu_header
)
3528 struct type
*base_type
;
3535 base_type
= die_type (die
, objfile
, cu_header
);
3536 die
->type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
3540 read_tag_volatile_type (struct die_info
*die
, struct objfile
*objfile
,
3541 const struct comp_unit_head
*cu_header
)
3543 struct type
*base_type
;
3550 base_type
= die_type (die
, objfile
, cu_header
);
3551 die
->type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
3554 /* Extract all information from a DW_TAG_string_type DIE and add to
3555 the user defined type vector. It isn't really a user defined type,
3556 but it behaves like one, with other DIE's using an AT_user_def_type
3557 attribute to reference it. */
3560 read_tag_string_type (struct die_info
*die
, struct objfile
*objfile
)
3562 struct type
*type
, *range_type
, *index_type
, *char_type
;
3563 struct attribute
*attr
;
3564 unsigned int length
;
3571 attr
= dwarf_attr (die
, DW_AT_string_length
);
3574 length
= DW_UNSND (attr
);
3578 /* check for the DW_AT_byte_size attribute */
3579 attr
= dwarf_attr (die
, DW_AT_byte_size
);
3582 length
= DW_UNSND (attr
);
3589 index_type
= dwarf2_fundamental_type (objfile
, FT_INTEGER
);
3590 range_type
= create_range_type (NULL
, index_type
, 1, length
);
3591 if (cu_language
== language_fortran
)
3593 /* Need to create a unique string type for bounds
3595 type
= create_string_type (0, range_type
);
3599 char_type
= dwarf2_fundamental_type (objfile
, FT_CHAR
);
3600 type
= create_string_type (char_type
, range_type
);
3605 /* Handle DIES due to C code like:
3609 int (*funcp)(int a, long l);
3613 ('funcp' generates a DW_TAG_subroutine_type DIE)
3617 read_subroutine_type (struct die_info
*die
, struct objfile
*objfile
,
3618 const struct comp_unit_head
*cu_header
)
3620 struct type
*type
; /* Type that this function returns */
3621 struct type
*ftype
; /* Function that returns above type */
3622 struct attribute
*attr
;
3624 /* Decode the type that this subroutine returns */
3629 type
= die_type (die
, objfile
, cu_header
);
3630 ftype
= lookup_function_type (type
);
3632 /* All functions in C++ have prototypes. */
3633 attr
= dwarf_attr (die
, DW_AT_prototyped
);
3634 if ((attr
&& (DW_UNSND (attr
) != 0))
3635 || cu_language
== language_cplus
)
3636 TYPE_FLAGS (ftype
) |= TYPE_FLAG_PROTOTYPED
;
3638 if (die
->has_children
)
3640 struct die_info
*child_die
;
3644 /* Count the number of parameters.
3645 FIXME: GDB currently ignores vararg functions, but knows about
3646 vararg member functions. */
3647 child_die
= die
->next
;
3648 while (child_die
&& child_die
->tag
)
3650 if (child_die
->tag
== DW_TAG_formal_parameter
)
3652 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
3653 TYPE_FLAGS (ftype
) |= TYPE_FLAG_VARARGS
;
3654 child_die
= sibling_die (child_die
);
3657 /* Allocate storage for parameters and fill them in. */
3658 TYPE_NFIELDS (ftype
) = nparams
;
3659 TYPE_FIELDS (ftype
) = (struct field
*)
3660 TYPE_ALLOC (ftype
, nparams
* sizeof (struct field
));
3662 child_die
= die
->next
;
3663 while (child_die
&& child_die
->tag
)
3665 if (child_die
->tag
== DW_TAG_formal_parameter
)
3667 /* Dwarf2 has no clean way to discern C++ static and non-static
3668 member functions. G++ helps GDB by marking the first
3669 parameter for non-static member functions (which is the
3670 this pointer) as artificial. We pass this information
3671 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
3672 attr
= dwarf_attr (child_die
, DW_AT_artificial
);
3674 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
3676 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
3677 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, objfile
,
3681 child_die
= sibling_die (child_die
);
3689 read_typedef (struct die_info
*die
, struct objfile
*objfile
,
3690 const struct comp_unit_head
*cu_header
)
3692 struct attribute
*attr
;
3697 attr
= dwarf_attr (die
, DW_AT_name
);
3698 if (attr
&& DW_STRING (attr
))
3700 name
= DW_STRING (attr
);
3702 die
->type
= init_type (TYPE_CODE_TYPEDEF
, 0, TYPE_FLAG_TARGET_STUB
, name
, objfile
);
3703 TYPE_TARGET_TYPE (die
->type
) = die_type (die
, objfile
, cu_header
);
3707 /* Find a representation of a given base type and install
3708 it in the TYPE field of the die. */
3711 read_base_type (struct die_info
*die
, struct objfile
*objfile
)
3714 struct attribute
*attr
;
3715 int encoding
= 0, size
= 0;
3717 /* If we've already decoded this die, this is a no-op. */
3723 attr
= dwarf_attr (die
, DW_AT_encoding
);
3726 encoding
= DW_UNSND (attr
);
3728 attr
= dwarf_attr (die
, DW_AT_byte_size
);
3731 size
= DW_UNSND (attr
);
3733 attr
= dwarf_attr (die
, DW_AT_name
);
3734 if (attr
&& DW_STRING (attr
))
3736 enum type_code code
= TYPE_CODE_INT
;
3741 case DW_ATE_address
:
3742 /* Turn DW_ATE_address into a void * pointer. */
3743 code
= TYPE_CODE_PTR
;
3744 type_flags
|= TYPE_FLAG_UNSIGNED
;
3746 case DW_ATE_boolean
:
3747 code
= TYPE_CODE_BOOL
;
3748 type_flags
|= TYPE_FLAG_UNSIGNED
;
3750 case DW_ATE_complex_float
:
3751 code
= TYPE_CODE_COMPLEX
;
3754 code
= TYPE_CODE_FLT
;
3757 case DW_ATE_signed_char
:
3759 case DW_ATE_unsigned
:
3760 case DW_ATE_unsigned_char
:
3761 type_flags
|= TYPE_FLAG_UNSIGNED
;
3764 complaint (&symfile_complaints
, "unsupported DW_AT_encoding: '%s'",
3765 dwarf_type_encoding_name (encoding
));
3768 type
= init_type (code
, size
, type_flags
, DW_STRING (attr
), objfile
);
3769 if (encoding
== DW_ATE_address
)
3770 TYPE_TARGET_TYPE (type
) = dwarf2_fundamental_type (objfile
, FT_VOID
);
3771 else if (encoding
== DW_ATE_complex_float
)
3774 TYPE_TARGET_TYPE (type
)
3775 = dwarf2_fundamental_type (objfile
, FT_EXT_PREC_FLOAT
);
3776 else if (size
== 16)
3777 TYPE_TARGET_TYPE (type
)
3778 = dwarf2_fundamental_type (objfile
, FT_DBL_PREC_FLOAT
);
3780 TYPE_TARGET_TYPE (type
)
3781 = dwarf2_fundamental_type (objfile
, FT_FLOAT
);
3786 type
= dwarf_base_type (encoding
, size
, objfile
);
3791 /* Read a whole compilation unit into a linked list of dies. */
3793 static struct die_info
*
3794 read_comp_unit (char *info_ptr
, bfd
*abfd
,
3795 const struct comp_unit_head
*cu_header
)
3797 struct die_info
*first_die
, *last_die
, *die
;
3801 /* Reset die reference table; we are
3802 building new ones now. */
3803 dwarf2_empty_hash_tables ();
3807 first_die
= last_die
= NULL
;
3810 cur_ptr
= read_full_die (&die
, abfd
, cur_ptr
, cu_header
);
3811 if (die
->has_children
)
3822 /* Enter die in reference hash table */
3823 store_in_ref_table (die
->offset
, die
);
3827 first_die
= last_die
= die
;
3831 last_die
->next
= die
;
3835 while (nesting_level
> 0);
3839 /* Free a linked list of dies. */
3842 free_die_list (struct die_info
*dies
)
3844 struct die_info
*die
, *next
;
3857 do_free_die_list_cleanup (void *dies
)
3859 free_die_list (dies
);
3862 static struct cleanup
*
3863 make_cleanup_free_die_list (struct die_info
*dies
)
3865 return make_cleanup (do_free_die_list_cleanup
, dies
);
3869 /* Read the contents of the section at OFFSET and of size SIZE from the
3870 object file specified by OBJFILE into the psymbol_obstack and return it. */
3873 dwarf2_read_section (struct objfile
*objfile
, file_ptr offset
,
3874 unsigned int size
, asection
*sectp
)
3876 bfd
*abfd
= objfile
->obfd
;
3882 buf
= (char *) obstack_alloc (&objfile
->psymbol_obstack
, size
);
3884 = (char *) symfile_relocate_debug_section (abfd
, sectp
, (bfd_byte
*) buf
);
3888 if ((bfd_seek (abfd
, offset
, SEEK_SET
) != 0) ||
3889 (bfd_bread (buf
, size
, abfd
) != size
))
3892 error ("Dwarf Error: Can't read DWARF data from '%s'",
3893 bfd_get_filename (abfd
));
3898 /* In DWARF version 2, the description of the debugging information is
3899 stored in a separate .debug_abbrev section. Before we read any
3900 dies from a section we read in all abbreviations and install them
3904 dwarf2_read_abbrevs (bfd
*abfd
, struct comp_unit_head
*cu_header
)
3907 struct abbrev_info
*cur_abbrev
;
3908 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
3909 unsigned int abbrev_form
, hash_number
;
3911 /* Initialize dwarf2 abbrevs */
3912 memset (cu_header
->dwarf2_abbrevs
, 0,
3913 ABBREV_HASH_SIZE
*sizeof (struct abbrev_info
*));
3915 abbrev_ptr
= dwarf_abbrev_buffer
+ cu_header
->abbrev_offset
;
3916 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3917 abbrev_ptr
+= bytes_read
;
3919 /* loop until we reach an abbrev number of 0 */
3920 while (abbrev_number
)
3922 cur_abbrev
= dwarf_alloc_abbrev ();
3924 /* read in abbrev header */
3925 cur_abbrev
->number
= abbrev_number
;
3926 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3927 abbrev_ptr
+= bytes_read
;
3928 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
3931 /* now read in declarations */
3932 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3933 abbrev_ptr
+= bytes_read
;
3934 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3935 abbrev_ptr
+= bytes_read
;
3938 if ((cur_abbrev
->num_attrs
% ATTR_ALLOC_CHUNK
) == 0)
3940 cur_abbrev
->attrs
= (struct attr_abbrev
*)
3941 xrealloc (cur_abbrev
->attrs
,
3942 (cur_abbrev
->num_attrs
+ ATTR_ALLOC_CHUNK
)
3943 * sizeof (struct attr_abbrev
));
3945 cur_abbrev
->attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
3946 cur_abbrev
->attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
3947 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3948 abbrev_ptr
+= bytes_read
;
3949 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3950 abbrev_ptr
+= bytes_read
;
3953 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
3954 cur_abbrev
->next
= cu_header
->dwarf2_abbrevs
[hash_number
];
3955 cu_header
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
3957 /* Get next abbreviation.
3958 Under Irix6 the abbreviations for a compilation unit are not
3959 always properly terminated with an abbrev number of 0.
3960 Exit loop if we encounter an abbreviation which we have
3961 already read (which means we are about to read the abbreviations
3962 for the next compile unit) or if the end of the abbreviation
3963 table is reached. */
3964 if ((unsigned int) (abbrev_ptr
- dwarf_abbrev_buffer
)
3965 >= dwarf_abbrev_size
)
3967 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
3968 abbrev_ptr
+= bytes_read
;
3969 if (dwarf2_lookup_abbrev (abbrev_number
, cu_header
) != NULL
)
3974 /* Empty the abbrev table for a new compilation unit. */
3978 dwarf2_empty_abbrev_table (void *ptr_to_abbrevs_table
)
3981 struct abbrev_info
*abbrev
, *next
;
3982 struct abbrev_info
**abbrevs
;
3984 abbrevs
= (struct abbrev_info
**)ptr_to_abbrevs_table
;
3986 for (i
= 0; i
< ABBREV_HASH_SIZE
; ++i
)
3989 abbrev
= abbrevs
[i
];
3992 next
= abbrev
->next
;
3993 xfree (abbrev
->attrs
);
4001 /* Lookup an abbrev_info structure in the abbrev hash table. */
4003 static struct abbrev_info
*
4004 dwarf2_lookup_abbrev (unsigned int number
, const struct comp_unit_head
*cu_header
)
4006 unsigned int hash_number
;
4007 struct abbrev_info
*abbrev
;
4009 hash_number
= number
% ABBREV_HASH_SIZE
;
4010 abbrev
= cu_header
->dwarf2_abbrevs
[hash_number
];
4014 if (abbrev
->number
== number
)
4017 abbrev
= abbrev
->next
;
4022 /* Read a minimal amount of information into the minimal die structure. */
4025 read_partial_die (struct partial_die_info
*part_die
, bfd
*abfd
,
4026 char *info_ptr
, const struct comp_unit_head
*cu_header
)
4028 unsigned int abbrev_number
, bytes_read
, i
;
4029 struct abbrev_info
*abbrev
;
4030 struct attribute attr
;
4031 struct attribute spec_attr
;
4032 int found_spec_attr
= 0;
4033 int has_low_pc_attr
= 0;
4034 int has_high_pc_attr
= 0;
4036 *part_die
= zeroed_partial_die
;
4037 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4038 info_ptr
+= bytes_read
;
4042 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu_header
);
4045 error ("Dwarf Error: Could not find abbrev number %d [in module %s]", abbrev_number
,
4046 bfd_get_filename (abfd
));
4048 part_die
->offset
= info_ptr
- dwarf_info_buffer
;
4049 part_die
->tag
= abbrev
->tag
;
4050 part_die
->has_children
= abbrev
->has_children
;
4051 part_die
->abbrev
= abbrev_number
;
4053 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
4055 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
,
4056 info_ptr
, cu_header
);
4058 /* Store the data if it is of an attribute we want to keep in a
4059 partial symbol table. */
4064 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
4065 if (part_die
->name
== NULL
)
4066 part_die
->name
= DW_STRING (&attr
);
4068 case DW_AT_MIPS_linkage_name
:
4069 part_die
->name
= DW_STRING (&attr
);
4072 has_low_pc_attr
= 1;
4073 part_die
->lowpc
= DW_ADDR (&attr
);
4076 has_high_pc_attr
= 1;
4077 part_die
->highpc
= DW_ADDR (&attr
);
4079 case DW_AT_location
:
4080 /* Support the .debug_loc offsets */
4081 if (attr_form_is_block (&attr
))
4083 part_die
->locdesc
= DW_BLOCK (&attr
);
4085 else if (attr
.form
== DW_FORM_data4
|| attr
.form
== DW_FORM_data8
)
4087 dwarf2_complex_location_expr_complaint ();
4091 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
4092 "partial symbol information");
4095 case DW_AT_language
:
4096 part_die
->language
= DW_UNSND (&attr
);
4098 case DW_AT_external
:
4099 part_die
->is_external
= DW_UNSND (&attr
);
4101 case DW_AT_declaration
:
4102 part_die
->is_declaration
= DW_UNSND (&attr
);
4105 part_die
->has_type
= 1;
4107 case DW_AT_abstract_origin
:
4108 case DW_AT_specification
:
4109 found_spec_attr
= 1;
4113 /* Ignore absolute siblings, they might point outside of
4114 the current compile unit. */
4115 if (attr
.form
== DW_FORM_ref_addr
)
4116 complaint (&symfile_complaints
, "ignoring absolute DW_AT_sibling");
4119 dwarf_info_buffer
+ dwarf2_get_ref_die_offset (&attr
);
4126 /* If we found a reference attribute and the die has no name, try
4127 to find a name in the referred to die. */
4129 if (found_spec_attr
&& part_die
->name
== NULL
)
4131 struct partial_die_info spec_die
;
4135 spec_ptr
= dwarf_info_buffer
+ dwarf2_get_ref_die_offset (&spec_attr
);
4136 read_partial_die (&spec_die
, abfd
, spec_ptr
, cu_header
);
4139 part_die
->name
= spec_die
.name
;
4141 /* Copy DW_AT_external attribute if it is set. */
4142 if (spec_die
.is_external
)
4143 part_die
->is_external
= spec_die
.is_external
;
4147 /* When using the GNU linker, .gnu.linkonce. sections are used to
4148 eliminate duplicate copies of functions and vtables and such.
4149 The linker will arbitrarily choose one and discard the others.
4150 The AT_*_pc values for such functions refer to local labels in
4151 these sections. If the section from that file was discarded, the
4152 labels are not in the output, so the relocs get a value of 0.
4153 If this is a discarded function, mark the pc bounds as invalid,
4154 so that GDB will ignore it. */
4155 if (has_low_pc_attr
&& has_high_pc_attr
4156 && part_die
->lowpc
< part_die
->highpc
4157 && (part_die
->lowpc
!= 0
4158 || (bfd_get_file_flags (abfd
) & HAS_RELOC
)))
4159 part_die
->has_pc_info
= 1;
4163 /* Read the die from the .debug_info section buffer. And set diep to
4164 point to a newly allocated die with its information. */
4167 read_full_die (struct die_info
**diep
, bfd
*abfd
, char *info_ptr
,
4168 const struct comp_unit_head
*cu_header
)
4170 unsigned int abbrev_number
, bytes_read
, i
, offset
;
4171 struct abbrev_info
*abbrev
;
4172 struct die_info
*die
;
4174 offset
= info_ptr
- dwarf_info_buffer
;
4175 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4176 info_ptr
+= bytes_read
;
4179 die
= dwarf_alloc_die ();
4181 die
->abbrev
= abbrev_number
;
4187 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu_header
);
4190 error ("Dwarf Error: could not find abbrev number %d [in module %s]", abbrev_number
,
4191 bfd_get_filename (abfd
));
4193 die
= dwarf_alloc_die ();
4194 die
->offset
= offset
;
4195 die
->tag
= abbrev
->tag
;
4196 die
->has_children
= abbrev
->has_children
;
4197 die
->abbrev
= abbrev_number
;
4200 die
->num_attrs
= abbrev
->num_attrs
;
4201 die
->attrs
= (struct attribute
*)
4202 xmalloc (die
->num_attrs
* sizeof (struct attribute
));
4204 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
4206 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
4207 abfd
, info_ptr
, cu_header
);
4214 /* Read an attribute value described by an attribute form. */
4217 read_attribute_value (struct attribute
*attr
, unsigned form
,
4218 bfd
*abfd
, char *info_ptr
,
4219 const struct comp_unit_head
*cu_header
)
4221 unsigned int bytes_read
;
4222 struct dwarf_block
*blk
;
4228 case DW_FORM_ref_addr
:
4229 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu_header
, &bytes_read
);
4230 info_ptr
+= bytes_read
;
4232 case DW_FORM_block2
:
4233 blk
= dwarf_alloc_block ();
4234 blk
->size
= read_2_bytes (abfd
, info_ptr
);
4236 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
4237 info_ptr
+= blk
->size
;
4238 DW_BLOCK (attr
) = blk
;
4240 case DW_FORM_block4
:
4241 blk
= dwarf_alloc_block ();
4242 blk
->size
= read_4_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
;
4249 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
4253 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
4257 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
4260 case DW_FORM_string
:
4261 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
4262 info_ptr
+= bytes_read
;
4265 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
4267 info_ptr
+= bytes_read
;
4270 blk
= dwarf_alloc_block ();
4271 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4272 info_ptr
+= bytes_read
;
4273 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
4274 info_ptr
+= blk
->size
;
4275 DW_BLOCK (attr
) = blk
;
4277 case DW_FORM_block1
:
4278 blk
= dwarf_alloc_block ();
4279 blk
->size
= read_1_byte (abfd
, info_ptr
);
4281 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
4282 info_ptr
+= blk
->size
;
4283 DW_BLOCK (attr
) = blk
;
4286 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
4290 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
4294 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
4295 info_ptr
+= bytes_read
;
4298 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4299 info_ptr
+= bytes_read
;
4302 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
4306 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
4310 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
4314 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
4317 case DW_FORM_ref_udata
:
4318 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4319 info_ptr
+= bytes_read
;
4321 case DW_FORM_indirect
:
4322 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4323 info_ptr
+= bytes_read
;
4324 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu_header
);
4327 error ("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]",
4328 dwarf_form_name (form
),
4329 bfd_get_filename (abfd
));
4334 /* Read an attribute described by an abbreviated attribute. */
4337 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
4338 bfd
*abfd
, char *info_ptr
,
4339 const struct comp_unit_head
*cu_header
)
4341 attr
->name
= abbrev
->name
;
4342 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu_header
);
4345 /* read dwarf information from a buffer */
4348 read_1_byte (bfd
*abfd
, char *buf
)
4350 return bfd_get_8 (abfd
, (bfd_byte
*) buf
);
4354 read_1_signed_byte (bfd
*abfd
, char *buf
)
4356 return bfd_get_signed_8 (abfd
, (bfd_byte
*) buf
);
4360 read_2_bytes (bfd
*abfd
, char *buf
)
4362 return bfd_get_16 (abfd
, (bfd_byte
*) buf
);
4366 read_2_signed_bytes (bfd
*abfd
, char *buf
)
4368 return bfd_get_signed_16 (abfd
, (bfd_byte
*) buf
);
4372 read_4_bytes (bfd
*abfd
, char *buf
)
4374 return bfd_get_32 (abfd
, (bfd_byte
*) buf
);
4378 read_4_signed_bytes (bfd
*abfd
, char *buf
)
4380 return bfd_get_signed_32 (abfd
, (bfd_byte
*) buf
);
4383 static unsigned long
4384 read_8_bytes (bfd
*abfd
, char *buf
)
4386 return bfd_get_64 (abfd
, (bfd_byte
*) buf
);
4390 read_address (bfd
*abfd
, char *buf
, const struct comp_unit_head
*cu_header
,
4393 CORE_ADDR retval
= 0;
4395 if (cu_header
->signed_addr_p
)
4397 switch (cu_header
->addr_size
)
4400 retval
= bfd_get_signed_16 (abfd
, (bfd_byte
*) buf
);
4403 retval
= bfd_get_signed_32 (abfd
, (bfd_byte
*) buf
);
4406 retval
= bfd_get_signed_64 (abfd
, (bfd_byte
*) buf
);
4409 internal_error (__FILE__
, __LINE__
,
4410 "read_address: bad switch, signed [in module %s]",
4411 bfd_get_filename (abfd
));
4416 switch (cu_header
->addr_size
)
4419 retval
= bfd_get_16 (abfd
, (bfd_byte
*) buf
);
4422 retval
= bfd_get_32 (abfd
, (bfd_byte
*) buf
);
4425 retval
= bfd_get_64 (abfd
, (bfd_byte
*) buf
);
4428 internal_error (__FILE__
, __LINE__
,
4429 "read_address: bad switch, unsigned [in module %s]",
4430 bfd_get_filename (abfd
));
4434 *bytes_read
= cu_header
->addr_size
;
4438 /* Read the initial length from a section. The (draft) DWARF 3
4439 specification allows the initial length to take up either 4 bytes
4440 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
4441 bytes describe the length and all offsets will be 8 bytes in length
4444 An older, non-standard 64-bit format is also handled by this
4445 function. The older format in question stores the initial length
4446 as an 8-byte quantity without an escape value. Lengths greater
4447 than 2^32 aren't very common which means that the initial 4 bytes
4448 is almost always zero. Since a length value of zero doesn't make
4449 sense for the 32-bit format, this initial zero can be considered to
4450 be an escape value which indicates the presence of the older 64-bit
4451 format. As written, the code can't detect (old format) lengths
4452 greater than 4GB. If it becomes necessary to handle lengths somewhat
4453 larger than 4GB, we could allow other small values (such as the
4454 non-sensical values of 1, 2, and 3) to also be used as escape values
4455 indicating the presence of the old format.
4457 The value returned via bytes_read should be used to increment
4458 the relevant pointer after calling read_initial_length().
4460 As a side effect, this function sets the fields initial_length_size
4461 and offset_size in cu_header to the values appropriate for the
4462 length field. (The format of the initial length field determines
4463 the width of file offsets to be fetched later with fetch_offset().)
4465 [ Note: read_initial_length() and read_offset() are based on the
4466 document entitled "DWARF Debugging Information Format", revision
4467 3, draft 8, dated November 19, 2001. This document was obtained
4470 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
4472 This document is only a draft and is subject to change. (So beware.)
4474 Details regarding the older, non-standard 64-bit format were
4475 determined empirically by examining 64-bit ELF files produced
4476 by the SGI toolchain on an IRIX 6.5 machine.
4478 - Kevin, July 16, 2002
4482 read_initial_length (bfd
*abfd
, char *buf
, struct comp_unit_head
*cu_header
,
4487 retval
= bfd_get_32 (abfd
, (bfd_byte
*) buf
);
4489 if (retval
== 0xffffffff)
4491 retval
= bfd_get_64 (abfd
, (bfd_byte
*) buf
+ 4);
4493 if (cu_header
!= NULL
)
4495 cu_header
->initial_length_size
= 12;
4496 cu_header
->offset_size
= 8;
4499 else if (retval
== 0)
4501 /* Handle (non-standard) 64-bit DWARF2 formats such as that used
4503 retval
= bfd_get_64 (abfd
, (bfd_byte
*) buf
);
4505 if (cu_header
!= NULL
)
4507 cu_header
->initial_length_size
= 8;
4508 cu_header
->offset_size
= 8;
4514 if (cu_header
!= NULL
)
4516 cu_header
->initial_length_size
= 4;
4517 cu_header
->offset_size
= 4;
4524 /* Read an offset from the data stream. The size of the offset is
4525 given by cu_header->offset_size. */
4528 read_offset (bfd
*abfd
, char *buf
, const struct comp_unit_head
*cu_header
,
4533 switch (cu_header
->offset_size
)
4536 retval
= bfd_get_32 (abfd
, (bfd_byte
*) buf
);
4540 retval
= bfd_get_64 (abfd
, (bfd_byte
*) buf
);
4544 internal_error (__FILE__
, __LINE__
,
4545 "read_offset: bad switch [in module %s]",
4546 bfd_get_filename (abfd
));
4553 read_n_bytes (bfd
*abfd
, char *buf
, unsigned int size
)
4555 /* If the size of a host char is 8 bits, we can return a pointer
4556 to the buffer, otherwise we have to copy the data to a buffer
4557 allocated on the temporary obstack. */
4558 gdb_assert (HOST_CHAR_BIT
== 8);
4563 read_string (bfd
*abfd
, char *buf
, unsigned int *bytes_read_ptr
)
4565 /* If the size of a host char is 8 bits, we can return a pointer
4566 to the string, otherwise we have to copy the string to a buffer
4567 allocated on the temporary obstack. */
4568 gdb_assert (HOST_CHAR_BIT
== 8);
4571 *bytes_read_ptr
= 1;
4574 *bytes_read_ptr
= strlen (buf
) + 1;
4579 read_indirect_string (bfd
*abfd
, char *buf
,
4580 const struct comp_unit_head
*cu_header
,
4581 unsigned int *bytes_read_ptr
)
4583 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
,
4584 (int *) bytes_read_ptr
);
4586 if (dwarf_str_buffer
== NULL
)
4588 error ("DW_FORM_strp used without .debug_str section [in module %s]",
4589 bfd_get_filename (abfd
));
4592 if (str_offset
>= dwarf_str_size
)
4594 error ("DW_FORM_strp pointing outside of .debug_str section [in module %s]",
4595 bfd_get_filename (abfd
));
4598 gdb_assert (HOST_CHAR_BIT
== 8);
4599 if (dwarf_str_buffer
[str_offset
] == '\0')
4601 return dwarf_str_buffer
+ str_offset
;
4604 static unsigned long
4605 read_unsigned_leb128 (bfd
*abfd
, char *buf
, unsigned int *bytes_read_ptr
)
4607 unsigned long result
;
4608 unsigned int num_read
;
4618 byte
= bfd_get_8 (abfd
, (bfd_byte
*) buf
);
4621 result
|= ((unsigned long)(byte
& 127) << shift
);
4622 if ((byte
& 128) == 0)
4628 *bytes_read_ptr
= num_read
;
4633 read_signed_leb128 (bfd
*abfd
, char *buf
, unsigned int *bytes_read_ptr
)
4636 int i
, shift
, size
, num_read
;
4646 byte
= bfd_get_8 (abfd
, (bfd_byte
*) buf
);
4649 result
|= ((long)(byte
& 127) << shift
);
4651 if ((byte
& 128) == 0)
4656 if ((shift
< size
) && (byte
& 0x40))
4658 result
|= -(1 << shift
);
4660 *bytes_read_ptr
= num_read
;
4665 set_cu_language (unsigned int lang
)
4671 cu_language
= language_c
;
4673 case DW_LANG_C_plus_plus
:
4674 cu_language
= language_cplus
;
4676 case DW_LANG_Fortran77
:
4677 case DW_LANG_Fortran90
:
4678 case DW_LANG_Fortran95
:
4679 cu_language
= language_fortran
;
4681 case DW_LANG_Mips_Assembler
:
4682 cu_language
= language_asm
;
4685 cu_language
= language_java
;
4689 case DW_LANG_Cobol74
:
4690 case DW_LANG_Cobol85
:
4691 case DW_LANG_Pascal83
:
4692 case DW_LANG_Modula2
:
4694 cu_language
= language_minimal
;
4697 cu_language_defn
= language_def (cu_language
);
4700 /* Return the named attribute or NULL if not there. */
4702 static struct attribute
*
4703 dwarf_attr (struct die_info
*die
, unsigned int name
)
4706 struct attribute
*spec
= NULL
;
4708 for (i
= 0; i
< die
->num_attrs
; ++i
)
4710 if (die
->attrs
[i
].name
== name
)
4712 return &die
->attrs
[i
];
4714 if (die
->attrs
[i
].name
== DW_AT_specification
4715 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
4716 spec
= &die
->attrs
[i
];
4720 struct die_info
*ref_die
=
4721 follow_die_ref (dwarf2_get_ref_die_offset (spec
));
4724 return dwarf_attr (ref_die
, name
);
4731 die_is_declaration (struct die_info
*die
)
4733 return (dwarf_attr (die
, DW_AT_declaration
)
4734 && ! dwarf_attr (die
, DW_AT_specification
));
4738 /* Free the line_header structure *LH, and any arrays and strings it
4741 free_line_header (struct line_header
*lh
)
4743 if (lh
->standard_opcode_lengths
)
4744 xfree (lh
->standard_opcode_lengths
);
4746 /* Remember that all the lh->file_names[i].name pointers are
4747 pointers into debug_line_buffer, and don't need to be freed. */
4749 xfree (lh
->file_names
);
4751 /* Similarly for the include directory names. */
4752 if (lh
->include_dirs
)
4753 xfree (lh
->include_dirs
);
4759 /* Add an entry to LH's include directory table. */
4761 add_include_dir (struct line_header
*lh
, char *include_dir
)
4763 /* Grow the array if necessary. */
4764 if (lh
->include_dirs_size
== 0)
4766 lh
->include_dirs_size
= 1; /* for testing */
4767 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
4768 * sizeof (*lh
->include_dirs
));
4770 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
4772 lh
->include_dirs_size
*= 2;
4773 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
4774 (lh
->include_dirs_size
4775 * sizeof (*lh
->include_dirs
)));
4778 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
4782 /* Add an entry to LH's file name table. */
4784 add_file_name (struct line_header
*lh
,
4786 unsigned int dir_index
,
4787 unsigned int mod_time
,
4788 unsigned int length
)
4790 struct file_entry
*fe
;
4792 /* Grow the array if necessary. */
4793 if (lh
->file_names_size
== 0)
4795 lh
->file_names_size
= 1; /* for testing */
4796 lh
->file_names
= xmalloc (lh
->file_names_size
4797 * sizeof (*lh
->file_names
));
4799 else if (lh
->num_file_names
>= lh
->file_names_size
)
4801 lh
->file_names_size
*= 2;
4802 lh
->file_names
= xrealloc (lh
->file_names
,
4803 (lh
->file_names_size
4804 * sizeof (*lh
->file_names
)));
4807 fe
= &lh
->file_names
[lh
->num_file_names
++];
4809 fe
->dir_index
= dir_index
;
4810 fe
->mod_time
= mod_time
;
4811 fe
->length
= length
;
4815 /* Read the statement program header starting at OFFSET in
4816 dwarf_line_buffer, according to the endianness of ABFD. Return a
4817 pointer to a struct line_header, allocated using xmalloc.
4819 NOTE: the strings in the include directory and file name tables of
4820 the returned object point into debug_line_buffer, and must not be
4822 static struct line_header
*
4823 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
4824 const struct comp_unit_head
*cu_header
)
4826 struct cleanup
*back_to
;
4827 struct line_header
*lh
;
4831 char *cur_dir
, *cur_file
;
4833 if (dwarf_line_buffer
== NULL
)
4835 complaint (&symfile_complaints
, "missing .debug_line section");
4839 /* Make sure that at least there's room for the total_length field. That
4840 could be 12 bytes long, but we're just going to fudge that. */
4841 if (offset
+ 4 >= dwarf_line_size
)
4843 dwarf2_statement_list_fits_in_line_number_section_complaint ();
4847 lh
= xmalloc (sizeof (*lh
));
4848 memset (lh
, 0, sizeof (*lh
));
4849 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
4852 line_ptr
= dwarf_line_buffer
+ offset
;
4854 /* read in the header */
4855 lh
->total_length
= read_initial_length (abfd
, line_ptr
, NULL
, &bytes_read
);
4856 line_ptr
+= bytes_read
;
4857 if (line_ptr
+ lh
->total_length
> dwarf_line_buffer
+ dwarf_line_size
)
4859 dwarf2_statement_list_fits_in_line_number_section_complaint ();
4862 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
4863 lh
->version
= read_2_bytes (abfd
, line_ptr
);
4865 lh
->header_length
= read_offset (abfd
, line_ptr
, cu_header
, &bytes_read
);
4866 line_ptr
+= bytes_read
;
4867 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
4869 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
4871 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
4873 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
4875 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
4877 lh
->standard_opcode_lengths
4878 = (unsigned char *) xmalloc (lh
->opcode_base
* sizeof (unsigned char));
4880 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
4881 for (i
= 1; i
< lh
->opcode_base
; ++i
)
4883 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
4887 /* Read directory table */
4888 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
4890 line_ptr
+= bytes_read
;
4891 add_include_dir (lh
, cur_dir
);
4893 line_ptr
+= bytes_read
;
4895 /* Read file name table */
4896 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
4898 unsigned int dir_index
, mod_time
, length
;
4900 line_ptr
+= bytes_read
;
4901 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
4902 line_ptr
+= bytes_read
;
4903 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
4904 line_ptr
+= bytes_read
;
4905 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
4906 line_ptr
+= bytes_read
;
4908 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
4910 line_ptr
+= bytes_read
;
4911 lh
->statement_program_start
= line_ptr
;
4913 if (line_ptr
> dwarf_line_buffer
+ dwarf_line_size
)
4914 complaint (&symfile_complaints
,
4915 "line number info header doesn't fit in `.debug_line' section");
4917 discard_cleanups (back_to
);
4921 /* This function exists to work around a bug in certain compilers
4922 (particularly GCC 2.95), in which the first line number marker of a
4923 function does not show up until after the prologue, right before
4924 the second line number marker. This function shifts ADDRESS down
4925 to the beginning of the function if necessary, and is called on
4926 addresses passed to record_line. */
4929 check_cu_functions (CORE_ADDR address
)
4931 struct function_range
*fn
;
4933 /* Find the function_range containing address. */
4938 cu_cached_fn
= cu_first_fn
;
4942 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
4948 while (fn
&& fn
!= cu_cached_fn
)
4949 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
4959 if (address
!= fn
->lowpc
)
4960 complaint (&symfile_complaints
,
4961 "misplaced first line number at 0x%lx for '%s'",
4962 (unsigned long) address
, fn
->name
);
4967 /* Decode the line number information for the compilation unit whose
4968 line number info is at OFFSET in the .debug_line section.
4969 The compilation directory of the file is passed in COMP_DIR. */
4972 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
4973 const struct comp_unit_head
*cu_header
)
4977 unsigned int i
, bytes_read
;
4979 unsigned char op_code
, extended_op
, adj_opcode
;
4981 line_ptr
= lh
->statement_program_start
;
4982 line_end
= lh
->statement_program_end
;
4984 /* Read the statement sequences until there's nothing left. */
4985 while (line_ptr
< line_end
)
4987 /* state machine registers */
4988 CORE_ADDR address
= 0;
4989 unsigned int file
= 1;
4990 unsigned int line
= 1;
4991 unsigned int column
= 0;
4992 int is_stmt
= lh
->default_is_stmt
;
4993 int basic_block
= 0;
4994 int end_sequence
= 0;
4996 /* Start a subfile for the current file of the state machine. */
4997 if (lh
->num_file_names
>= file
)
4999 /* lh->include_dirs and lh->file_names are 0-based, but the
5000 directory and file name numbers in the statement program
5002 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
5005 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
5008 dwarf2_start_subfile (fe
->name
, dir
);
5011 /* Decode the table. */
5012 while (!end_sequence
)
5014 op_code
= read_1_byte (abfd
, line_ptr
);
5017 if (op_code
>= lh
->opcode_base
)
5018 { /* Special operand. */
5019 adj_opcode
= op_code
- lh
->opcode_base
;
5020 address
+= (adj_opcode
/ lh
->line_range
)
5021 * lh
->minimum_instruction_length
;
5022 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
5023 /* append row to matrix using current values */
5024 record_line (current_subfile
, line
,
5025 check_cu_functions (address
));
5028 else switch (op_code
)
5030 case DW_LNS_extended_op
:
5031 line_ptr
+= 1; /* ignore length */
5032 extended_op
= read_1_byte (abfd
, line_ptr
);
5034 switch (extended_op
)
5036 case DW_LNE_end_sequence
:
5038 record_line (current_subfile
, 0, address
);
5040 case DW_LNE_set_address
:
5041 address
= read_address (abfd
, line_ptr
, cu_header
, &bytes_read
);
5042 line_ptr
+= bytes_read
;
5043 address
+= baseaddr
;
5045 case DW_LNE_define_file
:
5048 unsigned int dir_index
, mod_time
, length
;
5050 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
5051 line_ptr
+= bytes_read
;
5053 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
5054 line_ptr
+= bytes_read
;
5056 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
5057 line_ptr
+= bytes_read
;
5059 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
5060 line_ptr
+= bytes_read
;
5061 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
5065 complaint (&symfile_complaints
,
5066 "mangled .debug_line section");
5071 record_line (current_subfile
, line
,
5072 check_cu_functions (address
));
5075 case DW_LNS_advance_pc
:
5076 address
+= lh
->minimum_instruction_length
5077 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
5078 line_ptr
+= bytes_read
;
5080 case DW_LNS_advance_line
:
5081 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
5082 line_ptr
+= bytes_read
;
5084 case DW_LNS_set_file
:
5086 /* lh->include_dirs and lh->file_names are 0-based,
5087 but the directory and file name numbers in the
5088 statement program are 1-based. */
5089 struct file_entry
*fe
;
5091 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
5092 line_ptr
+= bytes_read
;
5093 fe
= &lh
->file_names
[file
- 1];
5095 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
5098 dwarf2_start_subfile (fe
->name
, dir
);
5101 case DW_LNS_set_column
:
5102 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
5103 line_ptr
+= bytes_read
;
5105 case DW_LNS_negate_stmt
:
5106 is_stmt
= (!is_stmt
);
5108 case DW_LNS_set_basic_block
:
5111 /* Add to the address register of the state machine the
5112 address increment value corresponding to special opcode
5113 255. Ie, this value is scaled by the minimum instruction
5114 length since special opcode 255 would have scaled the
5116 case DW_LNS_const_add_pc
:
5117 address
+= (lh
->minimum_instruction_length
5118 * ((255 - lh
->opcode_base
) / lh
->line_range
));
5120 case DW_LNS_fixed_advance_pc
:
5121 address
+= read_2_bytes (abfd
, line_ptr
);
5125 { /* Unknown standard opcode, ignore it. */
5127 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
5129 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
5130 line_ptr
+= bytes_read
;
5138 /* Start a subfile for DWARF. FILENAME is the name of the file and
5139 DIRNAME the name of the source directory which contains FILENAME
5140 or NULL if not known.
5141 This routine tries to keep line numbers from identical absolute and
5142 relative file names in a common subfile.
5144 Using the `list' example from the GDB testsuite, which resides in
5145 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
5146 of /srcdir/list0.c yields the following debugging information for list0.c:
5148 DW_AT_name: /srcdir/list0.c
5149 DW_AT_comp_dir: /compdir
5150 files.files[0].name: list0.h
5151 files.files[0].dir: /srcdir
5152 files.files[1].name: list0.c
5153 files.files[1].dir: /srcdir
5155 The line number information for list0.c has to end up in a single
5156 subfile, so that `break /srcdir/list0.c:1' works as expected. */
5159 dwarf2_start_subfile (char *filename
, char *dirname
)
5161 /* If the filename isn't absolute, try to match an existing subfile
5162 with the full pathname. */
5164 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
5166 struct subfile
*subfile
;
5167 char *fullname
= concat (dirname
, "/", filename
, NULL
);
5169 for (subfile
= subfiles
; subfile
; subfile
= subfile
->next
)
5171 if (FILENAME_CMP (subfile
->name
, fullname
) == 0)
5173 current_subfile
= subfile
;
5180 start_subfile (filename
, dirname
);
5184 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
5185 struct objfile
*objfile
,
5186 const struct comp_unit_head
*cu_header
)
5188 /* NOTE drow/2003-01-30: There used to be a comment and some special
5189 code here to turn a symbol with DW_AT_external and a
5190 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
5191 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
5192 with some versions of binutils) where shared libraries could have
5193 relocations against symbols in their debug information - the
5194 minimal symbol would have the right address, but the debug info
5195 would not. It's no longer necessary, because we will explicitly
5196 apply relocations when we read in the debug information now. */
5198 /* A DW_AT_location attribute with no contents indicates that a
5199 variable has been optimized away. */
5200 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
5202 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
5206 /* Handle one degenerate form of location expression specially, to
5207 preserve GDB's previous behavior when section offsets are
5208 specified. If this is just a DW_OP_addr then mark this symbol
5211 if (attr_form_is_block (attr
)
5212 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
5213 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
5217 SYMBOL_VALUE_ADDRESS (sym
) =
5218 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu_header
,
5220 fixup_symbol_section (sym
, objfile
);
5221 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
5222 SYMBOL_SECTION (sym
));
5223 SYMBOL_CLASS (sym
) = LOC_STATIC
;
5227 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
5228 expression evaluator, and use LOC_COMPUTED only when necessary
5229 (i.e. when the value of a register or memory location is
5230 referenced, or a thread-local block, etc.). Then again, it might
5231 not be worthwhile. I'm assuming that it isn't unless performance
5232 or memory numbers show me otherwise. */
5234 dwarf2_symbol_mark_computed (attr
, sym
, cu_header
, objfile
);
5235 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
5238 /* Given a pointer to a DWARF information entry, figure out if we need
5239 to make a symbol table entry for it, and if so, create a new entry
5240 and return a pointer to it.
5241 If TYPE is NULL, determine symbol type from the die, otherwise
5242 used the passed type. */
5244 static struct symbol
*
5245 new_symbol (struct die_info
*die
, struct type
*type
, struct objfile
*objfile
,
5246 const struct comp_unit_head
*cu_header
)
5248 struct symbol
*sym
= NULL
;
5250 struct attribute
*attr
= NULL
;
5251 struct attribute
*attr2
= NULL
;
5254 if (die
->tag
!= DW_TAG_namespace
)
5255 name
= dwarf2_linkage_name (die
);
5257 name
= TYPE_NAME (type
);
5261 sym
= (struct symbol
*) obstack_alloc (&objfile
->symbol_obstack
,
5262 sizeof (struct symbol
));
5263 OBJSTAT (objfile
, n_syms
++);
5264 memset (sym
, 0, sizeof (struct symbol
));
5266 /* Cache this symbol's name and the name's demangled form (if any). */
5267 SYMBOL_LANGUAGE (sym
) = cu_language
;
5268 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), objfile
);
5270 /* Default assumptions.
5271 Use the passed type or decode it from the die. */
5272 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
5273 SYMBOL_CLASS (sym
) = LOC_STATIC
;
5275 SYMBOL_TYPE (sym
) = type
;
5277 SYMBOL_TYPE (sym
) = die_type (die
, objfile
, cu_header
);
5278 attr
= dwarf_attr (die
, DW_AT_decl_line
);
5281 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
5286 attr
= dwarf_attr (die
, DW_AT_low_pc
);
5289 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
5291 SYMBOL_CLASS (sym
) = LOC_LABEL
;
5293 case DW_TAG_subprogram
:
5294 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
5296 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
5297 attr2
= dwarf_attr (die
, DW_AT_external
);
5298 if (attr2
&& (DW_UNSND (attr2
) != 0))
5300 add_symbol_to_list (sym
, &global_symbols
);
5304 add_symbol_to_list (sym
, list_in_scope
);
5307 case DW_TAG_variable
:
5308 /* Compilation with minimal debug info may result in variables
5309 with missing type entries. Change the misleading `void' type
5310 to something sensible. */
5311 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
5312 SYMBOL_TYPE (sym
) = init_type (TYPE_CODE_INT
,
5313 TARGET_INT_BIT
/ HOST_CHAR_BIT
, 0,
5314 "<variable, no debug info>",
5316 attr
= dwarf_attr (die
, DW_AT_const_value
);
5319 dwarf2_const_value (attr
, sym
, objfile
, cu_header
);
5320 attr2
= dwarf_attr (die
, DW_AT_external
);
5321 if (attr2
&& (DW_UNSND (attr2
) != 0))
5322 add_symbol_to_list (sym
, &global_symbols
);
5324 add_symbol_to_list (sym
, list_in_scope
);
5327 attr
= dwarf_attr (die
, DW_AT_location
);
5330 var_decode_location (attr
, sym
, objfile
, cu_header
);
5331 attr2
= dwarf_attr (die
, DW_AT_external
);
5332 if (attr2
&& (DW_UNSND (attr2
) != 0))
5333 add_symbol_to_list (sym
, &global_symbols
);
5335 add_symbol_to_list (sym
, list_in_scope
);
5339 /* We do not know the address of this symbol.
5340 If it is an external symbol and we have type information
5341 for it, enter the symbol as a LOC_UNRESOLVED symbol.
5342 The address of the variable will then be determined from
5343 the minimal symbol table whenever the variable is
5345 attr2
= dwarf_attr (die
, DW_AT_external
);
5346 if (attr2
&& (DW_UNSND (attr2
) != 0)
5347 && dwarf_attr (die
, DW_AT_type
) != NULL
)
5349 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
5350 add_symbol_to_list (sym
, &global_symbols
);
5354 case DW_TAG_formal_parameter
:
5355 attr
= dwarf_attr (die
, DW_AT_location
);
5358 var_decode_location (attr
, sym
, objfile
, cu_header
);
5359 /* FIXME drow/2003-07-31: Is LOC_COMPUTED_ARG necessary? */
5360 if (SYMBOL_CLASS (sym
) == LOC_COMPUTED
)
5361 SYMBOL_CLASS (sym
) = LOC_COMPUTED_ARG
;
5363 attr
= dwarf_attr (die
, DW_AT_const_value
);
5366 dwarf2_const_value (attr
, sym
, objfile
, cu_header
);
5368 add_symbol_to_list (sym
, list_in_scope
);
5370 case DW_TAG_unspecified_parameters
:
5371 /* From varargs functions; gdb doesn't seem to have any
5372 interest in this information, so just ignore it for now.
5375 case DW_TAG_class_type
:
5376 case DW_TAG_structure_type
:
5377 case DW_TAG_union_type
:
5378 case DW_TAG_enumeration_type
:
5379 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
5380 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
5381 add_symbol_to_list (sym
, list_in_scope
);
5383 /* The semantics of C++ state that "struct foo { ... }" also
5384 defines a typedef for "foo". Synthesize a typedef symbol so
5385 that "ptype foo" works as expected. */
5386 if (cu_language
== language_cplus
)
5388 struct symbol
*typedef_sym
= (struct symbol
*)
5389 obstack_alloc (&objfile
->symbol_obstack
,
5390 sizeof (struct symbol
));
5391 *typedef_sym
= *sym
;
5392 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
5393 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
5394 TYPE_NAME (SYMBOL_TYPE (sym
)) =
5395 obsavestring (DEPRECATED_SYMBOL_NAME (sym
),
5396 strlen (DEPRECATED_SYMBOL_NAME (sym
)),
5397 &objfile
->type_obstack
);
5398 add_symbol_to_list (typedef_sym
, list_in_scope
);
5401 case DW_TAG_typedef
:
5402 case DW_TAG_base_type
:
5403 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
5404 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
5405 add_symbol_to_list (sym
, list_in_scope
);
5407 case DW_TAG_enumerator
:
5408 attr
= dwarf_attr (die
, DW_AT_const_value
);
5411 dwarf2_const_value (attr
, sym
, objfile
, cu_header
);
5413 add_symbol_to_list (sym
, list_in_scope
);
5415 case DW_TAG_namespace
:
5416 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
5417 add_symbol_to_list (sym
, &global_symbols
);
5420 /* Not a tag we recognize. Hopefully we aren't processing
5421 trash data, but since we must specifically ignore things
5422 we don't recognize, there is nothing else we should do at
5424 complaint (&symfile_complaints
, "unsupported tag: '%s'",
5425 dwarf_tag_name (die
->tag
));
5432 /* Copy constant value from an attribute to a symbol. */
5435 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
5436 struct objfile
*objfile
,
5437 const struct comp_unit_head
*cu_header
)
5439 struct dwarf_block
*blk
;
5444 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
5445 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
5446 cu_header
->addr_size
,
5447 TYPE_LENGTH (SYMBOL_TYPE
5449 SYMBOL_VALUE_BYTES (sym
) = (char *)
5450 obstack_alloc (&objfile
->symbol_obstack
, cu_header
->addr_size
);
5451 /* NOTE: cagney/2003-05-09: In-lined store_address call with
5452 it's body - store_unsigned_integer. */
5453 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
5455 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
5457 case DW_FORM_block1
:
5458 case DW_FORM_block2
:
5459 case DW_FORM_block4
:
5461 blk
= DW_BLOCK (attr
);
5462 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
5463 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
5465 TYPE_LENGTH (SYMBOL_TYPE
5467 SYMBOL_VALUE_BYTES (sym
) = (char *)
5468 obstack_alloc (&objfile
->symbol_obstack
, blk
->size
);
5469 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
5470 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
5473 /* The DW_AT_const_value attributes are supposed to carry the
5474 symbol's value "represented as it would be on the target
5475 architecture." By the time we get here, it's already been
5476 converted to host endianness, so we just need to sign- or
5477 zero-extend it as appropriate. */
5479 dwarf2_const_value_data (attr
, sym
, 8);
5482 dwarf2_const_value_data (attr
, sym
, 16);
5485 dwarf2_const_value_data (attr
, sym
, 32);
5488 dwarf2_const_value_data (attr
, sym
, 64);
5492 SYMBOL_VALUE (sym
) = DW_SND (attr
);
5493 SYMBOL_CLASS (sym
) = LOC_CONST
;
5497 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
5498 SYMBOL_CLASS (sym
) = LOC_CONST
;
5502 complaint (&symfile_complaints
,
5503 "unsupported const value attribute form: '%s'",
5504 dwarf_form_name (attr
->form
));
5505 SYMBOL_VALUE (sym
) = 0;
5506 SYMBOL_CLASS (sym
) = LOC_CONST
;
5512 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
5513 or zero-extend it as appropriate for the symbol's type. */
5515 dwarf2_const_value_data (struct attribute
*attr
,
5519 LONGEST l
= DW_UNSND (attr
);
5521 if (bits
< sizeof (l
) * 8)
5523 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
5524 l
&= ((LONGEST
) 1 << bits
) - 1;
5526 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
5529 SYMBOL_VALUE (sym
) = l
;
5530 SYMBOL_CLASS (sym
) = LOC_CONST
;
5534 /* Return the type of the die in question using its DW_AT_type attribute. */
5536 static struct type
*
5537 die_type (struct die_info
*die
, struct objfile
*objfile
,
5538 const struct comp_unit_head
*cu_header
)
5541 struct attribute
*type_attr
;
5542 struct die_info
*type_die
;
5545 type_attr
= dwarf_attr (die
, DW_AT_type
);
5548 /* A missing DW_AT_type represents a void type. */
5549 return dwarf2_fundamental_type (objfile
, FT_VOID
);
5553 ref
= dwarf2_get_ref_die_offset (type_attr
);
5554 type_die
= follow_die_ref (ref
);
5557 error ("Dwarf Error: Cannot find referent at offset %d [in module %s]",
5558 ref
, objfile
->name
);
5562 type
= tag_type_to_type (type_die
, objfile
, cu_header
);
5565 dump_die (type_die
);
5566 error ("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]",
5572 /* Return the containing type of the die in question using its
5573 DW_AT_containing_type attribute. */
5575 static struct type
*
5576 die_containing_type (struct die_info
*die
, struct objfile
*objfile
,
5577 const struct comp_unit_head
*cu_header
)
5579 struct type
*type
= NULL
;
5580 struct attribute
*type_attr
;
5581 struct die_info
*type_die
= NULL
;
5584 type_attr
= dwarf_attr (die
, DW_AT_containing_type
);
5587 ref
= dwarf2_get_ref_die_offset (type_attr
);
5588 type_die
= follow_die_ref (ref
);
5591 error ("Dwarf Error: Cannot find referent at offset %d [in module %s]", ref
,
5595 type
= tag_type_to_type (type_die
, objfile
, cu_header
);
5600 dump_die (type_die
);
5601 error ("Dwarf Error: Problem turning containing type into gdb type [in module %s]",
5608 static struct type
*
5609 type_at_offset (unsigned int offset
, struct objfile
*objfile
)
5611 struct die_info
*die
;
5614 die
= follow_die_ref (offset
);
5617 error ("Dwarf Error: Cannot find type referent at offset %d.", offset
);
5620 type
= tag_type_to_type (die
, objfile
);
5625 static struct type
*
5626 tag_type_to_type (struct die_info
*die
, struct objfile
*objfile
,
5627 const struct comp_unit_head
*cu_header
)
5635 read_type_die (die
, objfile
, cu_header
);
5639 error ("Dwarf Error: Cannot find type of die [in module %s]",
5647 read_type_die (struct die_info
*die
, struct objfile
*objfile
,
5648 const struct comp_unit_head
*cu_header
)
5652 case DW_TAG_class_type
:
5653 case DW_TAG_structure_type
:
5654 case DW_TAG_union_type
:
5655 read_structure_scope (die
, objfile
, cu_header
);
5657 case DW_TAG_enumeration_type
:
5658 read_enumeration (die
, objfile
, cu_header
);
5660 case DW_TAG_subprogram
:
5661 case DW_TAG_subroutine_type
:
5662 read_subroutine_type (die
, objfile
, cu_header
);
5664 case DW_TAG_array_type
:
5665 read_array_type (die
, objfile
, cu_header
);
5667 case DW_TAG_pointer_type
:
5668 read_tag_pointer_type (die
, objfile
, cu_header
);
5670 case DW_TAG_ptr_to_member_type
:
5671 read_tag_ptr_to_member_type (die
, objfile
, cu_header
);
5673 case DW_TAG_reference_type
:
5674 read_tag_reference_type (die
, objfile
, cu_header
);
5676 case DW_TAG_const_type
:
5677 read_tag_const_type (die
, objfile
, cu_header
);
5679 case DW_TAG_volatile_type
:
5680 read_tag_volatile_type (die
, objfile
, cu_header
);
5682 case DW_TAG_string_type
:
5683 read_tag_string_type (die
, objfile
);
5685 case DW_TAG_typedef
:
5686 read_typedef (die
, objfile
, cu_header
);
5688 case DW_TAG_base_type
:
5689 read_base_type (die
, objfile
);
5692 complaint (&symfile_complaints
, "unexepected tag in read_type_die: '%s'",
5693 dwarf_tag_name (die
->tag
));
5698 static struct type
*
5699 dwarf_base_type (int encoding
, int size
, struct objfile
*objfile
)
5701 /* FIXME - this should not produce a new (struct type *)
5702 every time. It should cache base types. */
5706 case DW_ATE_address
:
5707 type
= dwarf2_fundamental_type (objfile
, FT_VOID
);
5709 case DW_ATE_boolean
:
5710 type
= dwarf2_fundamental_type (objfile
, FT_BOOLEAN
);
5712 case DW_ATE_complex_float
:
5715 type
= dwarf2_fundamental_type (objfile
, FT_DBL_PREC_COMPLEX
);
5719 type
= dwarf2_fundamental_type (objfile
, FT_COMPLEX
);
5725 type
= dwarf2_fundamental_type (objfile
, FT_DBL_PREC_FLOAT
);
5729 type
= dwarf2_fundamental_type (objfile
, FT_FLOAT
);
5736 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_CHAR
);
5739 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_SHORT
);
5743 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_INTEGER
);
5747 case DW_ATE_signed_char
:
5748 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_CHAR
);
5750 case DW_ATE_unsigned
:
5754 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_CHAR
);
5757 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_SHORT
);
5761 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_INTEGER
);
5765 case DW_ATE_unsigned_char
:
5766 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_CHAR
);
5769 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_INTEGER
);
5776 copy_die (struct die_info
*old_die
)
5778 struct die_info
*new_die
;
5781 new_die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
5782 memset (new_die
, 0, sizeof (struct die_info
));
5784 new_die
->tag
= old_die
->tag
;
5785 new_die
->has_children
= old_die
->has_children
;
5786 new_die
->abbrev
= old_die
->abbrev
;
5787 new_die
->offset
= old_die
->offset
;
5788 new_die
->type
= NULL
;
5790 num_attrs
= old_die
->num_attrs
;
5791 new_die
->num_attrs
= num_attrs
;
5792 new_die
->attrs
= (struct attribute
*)
5793 xmalloc (num_attrs
* sizeof (struct attribute
));
5795 for (i
= 0; i
< old_die
->num_attrs
; ++i
)
5797 new_die
->attrs
[i
].name
= old_die
->attrs
[i
].name
;
5798 new_die
->attrs
[i
].form
= old_die
->attrs
[i
].form
;
5799 new_die
->attrs
[i
].u
.addr
= old_die
->attrs
[i
].u
.addr
;
5802 new_die
->next
= NULL
;
5807 /* Return sibling of die, NULL if no sibling. */
5809 static struct die_info
*
5810 sibling_die (struct die_info
*die
)
5812 int nesting_level
= 0;
5814 if (!die
->has_children
)
5816 if (die
->next
&& (die
->next
->tag
== 0))
5829 if (die
->has_children
)
5839 while (nesting_level
);
5840 if (die
&& (die
->tag
== 0))
5851 /* Get linkage name of a die, return NULL if not found. */
5854 dwarf2_linkage_name (struct die_info
*die
)
5856 struct attribute
*attr
;
5858 attr
= dwarf_attr (die
, DW_AT_MIPS_linkage_name
);
5859 if (attr
&& DW_STRING (attr
))
5860 return DW_STRING (attr
);
5861 attr
= dwarf_attr (die
, DW_AT_name
);
5862 if (attr
&& DW_STRING (attr
))
5863 return DW_STRING (attr
);
5867 /* Get name of a die, return NULL if not found. */
5870 dwarf2_name (struct die_info
*die
)
5872 struct attribute
*attr
;
5874 attr
= dwarf_attr (die
, DW_AT_name
);
5875 if (attr
&& DW_STRING (attr
))
5876 return DW_STRING (attr
);
5880 /* Return the die that this die in an extension of, or NULL if there
5883 static struct die_info
*
5884 dwarf2_extension (struct die_info
*die
)
5886 struct attribute
*attr
;
5887 struct die_info
*extension_die
;
5890 attr
= dwarf_attr (die
, DW_AT_extension
);
5894 ref
= dwarf2_get_ref_die_offset (attr
);
5895 extension_die
= follow_die_ref (ref
);
5898 error ("Dwarf Error: Cannot find referent at offset %d.", ref
);
5901 return extension_die
;
5904 /* Convert a DIE tag into its string name. */
5907 dwarf_tag_name (register unsigned tag
)
5911 case DW_TAG_padding
:
5912 return "DW_TAG_padding";
5913 case DW_TAG_array_type
:
5914 return "DW_TAG_array_type";
5915 case DW_TAG_class_type
:
5916 return "DW_TAG_class_type";
5917 case DW_TAG_entry_point
:
5918 return "DW_TAG_entry_point";
5919 case DW_TAG_enumeration_type
:
5920 return "DW_TAG_enumeration_type";
5921 case DW_TAG_formal_parameter
:
5922 return "DW_TAG_formal_parameter";
5923 case DW_TAG_imported_declaration
:
5924 return "DW_TAG_imported_declaration";
5926 return "DW_TAG_label";
5927 case DW_TAG_lexical_block
:
5928 return "DW_TAG_lexical_block";
5930 return "DW_TAG_member";
5931 case DW_TAG_pointer_type
:
5932 return "DW_TAG_pointer_type";
5933 case DW_TAG_reference_type
:
5934 return "DW_TAG_reference_type";
5935 case DW_TAG_compile_unit
:
5936 return "DW_TAG_compile_unit";
5937 case DW_TAG_string_type
:
5938 return "DW_TAG_string_type";
5939 case DW_TAG_structure_type
:
5940 return "DW_TAG_structure_type";
5941 case DW_TAG_subroutine_type
:
5942 return "DW_TAG_subroutine_type";
5943 case DW_TAG_typedef
:
5944 return "DW_TAG_typedef";
5945 case DW_TAG_union_type
:
5946 return "DW_TAG_union_type";
5947 case DW_TAG_unspecified_parameters
:
5948 return "DW_TAG_unspecified_parameters";
5949 case DW_TAG_variant
:
5950 return "DW_TAG_variant";
5951 case DW_TAG_common_block
:
5952 return "DW_TAG_common_block";
5953 case DW_TAG_common_inclusion
:
5954 return "DW_TAG_common_inclusion";
5955 case DW_TAG_inheritance
:
5956 return "DW_TAG_inheritance";
5957 case DW_TAG_inlined_subroutine
:
5958 return "DW_TAG_inlined_subroutine";
5960 return "DW_TAG_module";
5961 case DW_TAG_ptr_to_member_type
:
5962 return "DW_TAG_ptr_to_member_type";
5963 case DW_TAG_set_type
:
5964 return "DW_TAG_set_type";
5965 case DW_TAG_subrange_type
:
5966 return "DW_TAG_subrange_type";
5967 case DW_TAG_with_stmt
:
5968 return "DW_TAG_with_stmt";
5969 case DW_TAG_access_declaration
:
5970 return "DW_TAG_access_declaration";
5971 case DW_TAG_base_type
:
5972 return "DW_TAG_base_type";
5973 case DW_TAG_catch_block
:
5974 return "DW_TAG_catch_block";
5975 case DW_TAG_const_type
:
5976 return "DW_TAG_const_type";
5977 case DW_TAG_constant
:
5978 return "DW_TAG_constant";
5979 case DW_TAG_enumerator
:
5980 return "DW_TAG_enumerator";
5981 case DW_TAG_file_type
:
5982 return "DW_TAG_file_type";
5984 return "DW_TAG_friend";
5985 case DW_TAG_namelist
:
5986 return "DW_TAG_namelist";
5987 case DW_TAG_namelist_item
:
5988 return "DW_TAG_namelist_item";
5989 case DW_TAG_packed_type
:
5990 return "DW_TAG_packed_type";
5991 case DW_TAG_subprogram
:
5992 return "DW_TAG_subprogram";
5993 case DW_TAG_template_type_param
:
5994 return "DW_TAG_template_type_param";
5995 case DW_TAG_template_value_param
:
5996 return "DW_TAG_template_value_param";
5997 case DW_TAG_thrown_type
:
5998 return "DW_TAG_thrown_type";
5999 case DW_TAG_try_block
:
6000 return "DW_TAG_try_block";
6001 case DW_TAG_variant_part
:
6002 return "DW_TAG_variant_part";
6003 case DW_TAG_variable
:
6004 return "DW_TAG_variable";
6005 case DW_TAG_volatile_type
:
6006 return "DW_TAG_volatile_type";
6007 case DW_TAG_dwarf_procedure
:
6008 return "DW_TAG_dwarf_procedure";
6009 case DW_TAG_restrict_type
:
6010 return "DW_TAG_restrict_type";
6011 case DW_TAG_interface_type
:
6012 return "DW_TAG_interface_type";
6013 case DW_TAG_namespace
:
6014 return "DW_TAG_namespace";
6015 case DW_TAG_imported_module
:
6016 return "DW_TAG_imported_module";
6017 case DW_TAG_unspecified_type
:
6018 return "DW_TAG_unspecified_type";
6019 case DW_TAG_partial_unit
:
6020 return "DW_TAG_partial_unit";
6021 case DW_TAG_imported_unit
:
6022 return "DW_TAG_imported_unit";
6023 case DW_TAG_MIPS_loop
:
6024 return "DW_TAG_MIPS_loop";
6025 case DW_TAG_format_label
:
6026 return "DW_TAG_format_label";
6027 case DW_TAG_function_template
:
6028 return "DW_TAG_function_template";
6029 case DW_TAG_class_template
:
6030 return "DW_TAG_class_template";
6032 return "DW_TAG_<unknown>";
6036 /* Convert a DWARF attribute code into its string name. */
6039 dwarf_attr_name (register unsigned attr
)
6044 return "DW_AT_sibling";
6045 case DW_AT_location
:
6046 return "DW_AT_location";
6048 return "DW_AT_name";
6049 case DW_AT_ordering
:
6050 return "DW_AT_ordering";
6051 case DW_AT_subscr_data
:
6052 return "DW_AT_subscr_data";
6053 case DW_AT_byte_size
:
6054 return "DW_AT_byte_size";
6055 case DW_AT_bit_offset
:
6056 return "DW_AT_bit_offset";
6057 case DW_AT_bit_size
:
6058 return "DW_AT_bit_size";
6059 case DW_AT_element_list
:
6060 return "DW_AT_element_list";
6061 case DW_AT_stmt_list
:
6062 return "DW_AT_stmt_list";
6064 return "DW_AT_low_pc";
6066 return "DW_AT_high_pc";
6067 case DW_AT_language
:
6068 return "DW_AT_language";
6070 return "DW_AT_member";
6072 return "DW_AT_discr";
6073 case DW_AT_discr_value
:
6074 return "DW_AT_discr_value";
6075 case DW_AT_visibility
:
6076 return "DW_AT_visibility";
6078 return "DW_AT_import";
6079 case DW_AT_string_length
:
6080 return "DW_AT_string_length";
6081 case DW_AT_common_reference
:
6082 return "DW_AT_common_reference";
6083 case DW_AT_comp_dir
:
6084 return "DW_AT_comp_dir";
6085 case DW_AT_const_value
:
6086 return "DW_AT_const_value";
6087 case DW_AT_containing_type
:
6088 return "DW_AT_containing_type";
6089 case DW_AT_default_value
:
6090 return "DW_AT_default_value";
6092 return "DW_AT_inline";
6093 case DW_AT_is_optional
:
6094 return "DW_AT_is_optional";
6095 case DW_AT_lower_bound
:
6096 return "DW_AT_lower_bound";
6097 case DW_AT_producer
:
6098 return "DW_AT_producer";
6099 case DW_AT_prototyped
:
6100 return "DW_AT_prototyped";
6101 case DW_AT_return_addr
:
6102 return "DW_AT_return_addr";
6103 case DW_AT_start_scope
:
6104 return "DW_AT_start_scope";
6105 case DW_AT_stride_size
:
6106 return "DW_AT_stride_size";
6107 case DW_AT_upper_bound
:
6108 return "DW_AT_upper_bound";
6109 case DW_AT_abstract_origin
:
6110 return "DW_AT_abstract_origin";
6111 case DW_AT_accessibility
:
6112 return "DW_AT_accessibility";
6113 case DW_AT_address_class
:
6114 return "DW_AT_address_class";
6115 case DW_AT_artificial
:
6116 return "DW_AT_artificial";
6117 case DW_AT_base_types
:
6118 return "DW_AT_base_types";
6119 case DW_AT_calling_convention
:
6120 return "DW_AT_calling_convention";
6122 return "DW_AT_count";
6123 case DW_AT_data_member_location
:
6124 return "DW_AT_data_member_location";
6125 case DW_AT_decl_column
:
6126 return "DW_AT_decl_column";
6127 case DW_AT_decl_file
:
6128 return "DW_AT_decl_file";
6129 case DW_AT_decl_line
:
6130 return "DW_AT_decl_line";
6131 case DW_AT_declaration
:
6132 return "DW_AT_declaration";
6133 case DW_AT_discr_list
:
6134 return "DW_AT_discr_list";
6135 case DW_AT_encoding
:
6136 return "DW_AT_encoding";
6137 case DW_AT_external
:
6138 return "DW_AT_external";
6139 case DW_AT_frame_base
:
6140 return "DW_AT_frame_base";
6142 return "DW_AT_friend";
6143 case DW_AT_identifier_case
:
6144 return "DW_AT_identifier_case";
6145 case DW_AT_macro_info
:
6146 return "DW_AT_macro_info";
6147 case DW_AT_namelist_items
:
6148 return "DW_AT_namelist_items";
6149 case DW_AT_priority
:
6150 return "DW_AT_priority";
6152 return "DW_AT_segment";
6153 case DW_AT_specification
:
6154 return "DW_AT_specification";
6155 case DW_AT_static_link
:
6156 return "DW_AT_static_link";
6158 return "DW_AT_type";
6159 case DW_AT_use_location
:
6160 return "DW_AT_use_location";
6161 case DW_AT_variable_parameter
:
6162 return "DW_AT_variable_parameter";
6163 case DW_AT_virtuality
:
6164 return "DW_AT_virtuality";
6165 case DW_AT_vtable_elem_location
:
6166 return "DW_AT_vtable_elem_location";
6167 case DW_AT_allocated
:
6168 return "DW_AT_allocated";
6169 case DW_AT_associated
:
6170 return "DW_AT_associated";
6171 case DW_AT_data_location
:
6172 return "DW_AT_data_location";
6174 return "DW_AT_stride";
6175 case DW_AT_entry_pc
:
6176 return "DW_AT_entry_pc";
6177 case DW_AT_use_UTF8
:
6178 return "DW_AT_use_UTF8";
6179 case DW_AT_extension
:
6180 return "DW_AT_extension";
6182 return "DW_AT_ranges";
6183 case DW_AT_trampoline
:
6184 return "DW_AT_trampoline";
6185 case DW_AT_call_column
:
6186 return "DW_AT_call_column";
6187 case DW_AT_call_file
:
6188 return "DW_AT_call_file";
6189 case DW_AT_call_line
:
6190 return "DW_AT_call_line";
6192 case DW_AT_MIPS_fde
:
6193 return "DW_AT_MIPS_fde";
6194 case DW_AT_MIPS_loop_begin
:
6195 return "DW_AT_MIPS_loop_begin";
6196 case DW_AT_MIPS_tail_loop_begin
:
6197 return "DW_AT_MIPS_tail_loop_begin";
6198 case DW_AT_MIPS_epilog_begin
:
6199 return "DW_AT_MIPS_epilog_begin";
6200 case DW_AT_MIPS_loop_unroll_factor
:
6201 return "DW_AT_MIPS_loop_unroll_factor";
6202 case DW_AT_MIPS_software_pipeline_depth
:
6203 return "DW_AT_MIPS_software_pipeline_depth";
6205 case DW_AT_MIPS_linkage_name
:
6206 return "DW_AT_MIPS_linkage_name";
6208 case DW_AT_sf_names
:
6209 return "DW_AT_sf_names";
6210 case DW_AT_src_info
:
6211 return "DW_AT_src_info";
6212 case DW_AT_mac_info
:
6213 return "DW_AT_mac_info";
6214 case DW_AT_src_coords
:
6215 return "DW_AT_src_coords";
6216 case DW_AT_body_begin
:
6217 return "DW_AT_body_begin";
6218 case DW_AT_body_end
:
6219 return "DW_AT_body_end";
6220 case DW_AT_GNU_vector
:
6221 return "DW_AT_GNU_vector";
6223 return "DW_AT_<unknown>";
6227 /* Convert a DWARF value form code into its string name. */
6230 dwarf_form_name (register unsigned form
)
6235 return "DW_FORM_addr";
6236 case DW_FORM_block2
:
6237 return "DW_FORM_block2";
6238 case DW_FORM_block4
:
6239 return "DW_FORM_block4";
6241 return "DW_FORM_data2";
6243 return "DW_FORM_data4";
6245 return "DW_FORM_data8";
6246 case DW_FORM_string
:
6247 return "DW_FORM_string";
6249 return "DW_FORM_block";
6250 case DW_FORM_block1
:
6251 return "DW_FORM_block1";
6253 return "DW_FORM_data1";
6255 return "DW_FORM_flag";
6257 return "DW_FORM_sdata";
6259 return "DW_FORM_strp";
6261 return "DW_FORM_udata";
6262 case DW_FORM_ref_addr
:
6263 return "DW_FORM_ref_addr";
6265 return "DW_FORM_ref1";
6267 return "DW_FORM_ref2";
6269 return "DW_FORM_ref4";
6271 return "DW_FORM_ref8";
6272 case DW_FORM_ref_udata
:
6273 return "DW_FORM_ref_udata";
6274 case DW_FORM_indirect
:
6275 return "DW_FORM_indirect";
6277 return "DW_FORM_<unknown>";
6281 /* Convert a DWARF stack opcode into its string name. */
6284 dwarf_stack_op_name (register unsigned op
)
6289 return "DW_OP_addr";
6291 return "DW_OP_deref";
6293 return "DW_OP_const1u";
6295 return "DW_OP_const1s";
6297 return "DW_OP_const2u";
6299 return "DW_OP_const2s";
6301 return "DW_OP_const4u";
6303 return "DW_OP_const4s";
6305 return "DW_OP_const8u";
6307 return "DW_OP_const8s";
6309 return "DW_OP_constu";
6311 return "DW_OP_consts";
6315 return "DW_OP_drop";
6317 return "DW_OP_over";
6319 return "DW_OP_pick";
6321 return "DW_OP_swap";
6325 return "DW_OP_xderef";
6333 return "DW_OP_minus";
6345 return "DW_OP_plus";
6346 case DW_OP_plus_uconst
:
6347 return "DW_OP_plus_uconst";
6353 return "DW_OP_shra";
6371 return "DW_OP_skip";
6373 return "DW_OP_lit0";
6375 return "DW_OP_lit1";
6377 return "DW_OP_lit2";
6379 return "DW_OP_lit3";
6381 return "DW_OP_lit4";
6383 return "DW_OP_lit5";
6385 return "DW_OP_lit6";
6387 return "DW_OP_lit7";
6389 return "DW_OP_lit8";
6391 return "DW_OP_lit9";
6393 return "DW_OP_lit10";
6395 return "DW_OP_lit11";
6397 return "DW_OP_lit12";
6399 return "DW_OP_lit13";
6401 return "DW_OP_lit14";
6403 return "DW_OP_lit15";
6405 return "DW_OP_lit16";
6407 return "DW_OP_lit17";
6409 return "DW_OP_lit18";
6411 return "DW_OP_lit19";
6413 return "DW_OP_lit20";
6415 return "DW_OP_lit21";
6417 return "DW_OP_lit22";
6419 return "DW_OP_lit23";
6421 return "DW_OP_lit24";
6423 return "DW_OP_lit25";
6425 return "DW_OP_lit26";
6427 return "DW_OP_lit27";
6429 return "DW_OP_lit28";
6431 return "DW_OP_lit29";
6433 return "DW_OP_lit30";
6435 return "DW_OP_lit31";
6437 return "DW_OP_reg0";
6439 return "DW_OP_reg1";
6441 return "DW_OP_reg2";
6443 return "DW_OP_reg3";
6445 return "DW_OP_reg4";
6447 return "DW_OP_reg5";
6449 return "DW_OP_reg6";
6451 return "DW_OP_reg7";
6453 return "DW_OP_reg8";
6455 return "DW_OP_reg9";
6457 return "DW_OP_reg10";
6459 return "DW_OP_reg11";
6461 return "DW_OP_reg12";
6463 return "DW_OP_reg13";
6465 return "DW_OP_reg14";
6467 return "DW_OP_reg15";
6469 return "DW_OP_reg16";
6471 return "DW_OP_reg17";
6473 return "DW_OP_reg18";
6475 return "DW_OP_reg19";
6477 return "DW_OP_reg20";
6479 return "DW_OP_reg21";
6481 return "DW_OP_reg22";
6483 return "DW_OP_reg23";
6485 return "DW_OP_reg24";
6487 return "DW_OP_reg25";
6489 return "DW_OP_reg26";
6491 return "DW_OP_reg27";
6493 return "DW_OP_reg28";
6495 return "DW_OP_reg29";
6497 return "DW_OP_reg30";
6499 return "DW_OP_reg31";
6501 return "DW_OP_breg0";
6503 return "DW_OP_breg1";
6505 return "DW_OP_breg2";
6507 return "DW_OP_breg3";
6509 return "DW_OP_breg4";
6511 return "DW_OP_breg5";
6513 return "DW_OP_breg6";
6515 return "DW_OP_breg7";
6517 return "DW_OP_breg8";
6519 return "DW_OP_breg9";
6521 return "DW_OP_breg10";
6523 return "DW_OP_breg11";
6525 return "DW_OP_breg12";
6527 return "DW_OP_breg13";
6529 return "DW_OP_breg14";
6531 return "DW_OP_breg15";
6533 return "DW_OP_breg16";
6535 return "DW_OP_breg17";
6537 return "DW_OP_breg18";
6539 return "DW_OP_breg19";
6541 return "DW_OP_breg20";
6543 return "DW_OP_breg21";
6545 return "DW_OP_breg22";
6547 return "DW_OP_breg23";
6549 return "DW_OP_breg24";
6551 return "DW_OP_breg25";
6553 return "DW_OP_breg26";
6555 return "DW_OP_breg27";
6557 return "DW_OP_breg28";
6559 return "DW_OP_breg29";
6561 return "DW_OP_breg30";
6563 return "DW_OP_breg31";
6565 return "DW_OP_regx";
6567 return "DW_OP_fbreg";
6569 return "DW_OP_bregx";
6571 return "DW_OP_piece";
6572 case DW_OP_deref_size
:
6573 return "DW_OP_deref_size";
6574 case DW_OP_xderef_size
:
6575 return "DW_OP_xderef_size";
6578 /* DWARF 3 extensions. */
6579 case DW_OP_push_object_address
:
6580 return "DW_OP_push_object_address";
6582 return "DW_OP_call2";
6584 return "DW_OP_call4";
6585 case DW_OP_call_ref
:
6586 return "DW_OP_call_ref";
6587 /* GNU extensions. */
6588 case DW_OP_GNU_push_tls_address
:
6589 return "DW_OP_GNU_push_tls_address";
6591 return "OP_<unknown>";
6596 dwarf_bool_name (unsigned mybool
)
6604 /* Convert a DWARF type code into its string name. */
6607 dwarf_type_encoding_name (register unsigned enc
)
6611 case DW_ATE_address
:
6612 return "DW_ATE_address";
6613 case DW_ATE_boolean
:
6614 return "DW_ATE_boolean";
6615 case DW_ATE_complex_float
:
6616 return "DW_ATE_complex_float";
6618 return "DW_ATE_float";
6620 return "DW_ATE_signed";
6621 case DW_ATE_signed_char
:
6622 return "DW_ATE_signed_char";
6623 case DW_ATE_unsigned
:
6624 return "DW_ATE_unsigned";
6625 case DW_ATE_unsigned_char
:
6626 return "DW_ATE_unsigned_char";
6627 case DW_ATE_imaginary_float
:
6628 return "DW_ATE_imaginary_float";
6630 return "DW_ATE_<unknown>";
6634 /* Convert a DWARF call frame info operation to its string name. */
6638 dwarf_cfi_name (register unsigned cfi_opc
)
6642 case DW_CFA_advance_loc
:
6643 return "DW_CFA_advance_loc";
6645 return "DW_CFA_offset";
6646 case DW_CFA_restore
:
6647 return "DW_CFA_restore";
6649 return "DW_CFA_nop";
6650 case DW_CFA_set_loc
:
6651 return "DW_CFA_set_loc";
6652 case DW_CFA_advance_loc1
:
6653 return "DW_CFA_advance_loc1";
6654 case DW_CFA_advance_loc2
:
6655 return "DW_CFA_advance_loc2";
6656 case DW_CFA_advance_loc4
:
6657 return "DW_CFA_advance_loc4";
6658 case DW_CFA_offset_extended
:
6659 return "DW_CFA_offset_extended";
6660 case DW_CFA_restore_extended
:
6661 return "DW_CFA_restore_extended";
6662 case DW_CFA_undefined
:
6663 return "DW_CFA_undefined";
6664 case DW_CFA_same_value
:
6665 return "DW_CFA_same_value";
6666 case DW_CFA_register
:
6667 return "DW_CFA_register";
6668 case DW_CFA_remember_state
:
6669 return "DW_CFA_remember_state";
6670 case DW_CFA_restore_state
:
6671 return "DW_CFA_restore_state";
6672 case DW_CFA_def_cfa
:
6673 return "DW_CFA_def_cfa";
6674 case DW_CFA_def_cfa_register
:
6675 return "DW_CFA_def_cfa_register";
6676 case DW_CFA_def_cfa_offset
:
6677 return "DW_CFA_def_cfa_offset";
6680 case DW_CFA_def_cfa_expression
:
6681 return "DW_CFA_def_cfa_expression";
6682 case DW_CFA_expression
:
6683 return "DW_CFA_expression";
6684 case DW_CFA_offset_extended_sf
:
6685 return "DW_CFA_offset_extended_sf";
6686 case DW_CFA_def_cfa_sf
:
6687 return "DW_CFA_def_cfa_sf";
6688 case DW_CFA_def_cfa_offset_sf
:
6689 return "DW_CFA_def_cfa_offset_sf";
6691 /* SGI/MIPS specific */
6692 case DW_CFA_MIPS_advance_loc8
:
6693 return "DW_CFA_MIPS_advance_loc8";
6695 /* GNU extensions */
6696 case DW_CFA_GNU_window_save
:
6697 return "DW_CFA_GNU_window_save";
6698 case DW_CFA_GNU_args_size
:
6699 return "DW_CFA_GNU_args_size";
6700 case DW_CFA_GNU_negative_offset_extended
:
6701 return "DW_CFA_GNU_negative_offset_extended";
6704 return "DW_CFA_<unknown>";
6710 dump_die (struct die_info
*die
)
6714 fprintf_unfiltered (gdb_stderr
, "Die: %s (abbrev = %d, offset = %d)\n",
6715 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
6716 fprintf_unfiltered (gdb_stderr
, "\thas children: %s\n",
6717 dwarf_bool_name (die
->has_children
));
6719 fprintf_unfiltered (gdb_stderr
, "\tattributes:\n");
6720 for (i
= 0; i
< die
->num_attrs
; ++i
)
6722 fprintf_unfiltered (gdb_stderr
, "\t\t%s (%s) ",
6723 dwarf_attr_name (die
->attrs
[i
].name
),
6724 dwarf_form_name (die
->attrs
[i
].form
));
6725 switch (die
->attrs
[i
].form
)
6727 case DW_FORM_ref_addr
:
6729 fprintf_unfiltered (gdb_stderr
, "address: ");
6730 print_address_numeric (DW_ADDR (&die
->attrs
[i
]), 1, gdb_stderr
);
6732 case DW_FORM_block2
:
6733 case DW_FORM_block4
:
6735 case DW_FORM_block1
:
6736 fprintf_unfiltered (gdb_stderr
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
6747 fprintf_unfiltered (gdb_stderr
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
6749 case DW_FORM_string
:
6751 fprintf_unfiltered (gdb_stderr
, "string: \"%s\"",
6752 DW_STRING (&die
->attrs
[i
])
6753 ? DW_STRING (&die
->attrs
[i
]) : "");
6756 if (DW_UNSND (&die
->attrs
[i
]))
6757 fprintf_unfiltered (gdb_stderr
, "flag: TRUE");
6759 fprintf_unfiltered (gdb_stderr
, "flag: FALSE");
6761 case DW_FORM_indirect
:
6762 /* the reader will have reduced the indirect form to
6763 the "base form" so this form should not occur */
6764 fprintf_unfiltered (gdb_stderr
, "unexpected attribute form: DW_FORM_indirect");
6767 fprintf_unfiltered (gdb_stderr
, "unsupported attribute form: %d.",
6768 die
->attrs
[i
].form
);
6770 fprintf_unfiltered (gdb_stderr
, "\n");
6775 dump_die_list (struct die_info
*die
)
6785 store_in_ref_table (unsigned int offset
, struct die_info
*die
)
6788 struct die_info
*old
;
6790 h
= (offset
% REF_HASH_SIZE
);
6791 old
= die_ref_table
[h
];
6792 die
->next_ref
= old
;
6793 die_ref_table
[h
] = die
;
6798 dwarf2_empty_hash_tables (void)
6800 memset (die_ref_table
, 0, sizeof (die_ref_table
));
6804 dwarf2_get_ref_die_offset (struct attribute
*attr
)
6806 unsigned int result
= 0;
6810 case DW_FORM_ref_addr
:
6811 result
= DW_ADDR (attr
);
6817 case DW_FORM_ref_udata
:
6818 result
= cu_header_offset
+ DW_UNSND (attr
);
6821 complaint (&symfile_complaints
,
6822 "unsupported die ref attribute form: '%s'",
6823 dwarf_form_name (attr
->form
));
6828 static struct die_info
*
6829 follow_die_ref (unsigned int offset
)
6831 struct die_info
*die
;
6834 h
= (offset
% REF_HASH_SIZE
);
6835 die
= die_ref_table
[h
];
6838 if (die
->offset
== offset
)
6842 die
= die
->next_ref
;
6847 static struct type
*
6848 dwarf2_fundamental_type (struct objfile
*objfile
, int typeid)
6850 if (typeid < 0 || typeid >= FT_NUM_MEMBERS
)
6852 error ("Dwarf Error: internal error - invalid fundamental type id %d [in module %s]",
6853 typeid, objfile
->name
);
6856 /* Look for this particular type in the fundamental type vector. If
6857 one is not found, create and install one appropriate for the
6858 current language and the current target machine. */
6860 if (ftypes
[typeid] == NULL
)
6862 ftypes
[typeid] = cu_language_defn
->la_fund_type (objfile
, typeid);
6865 return (ftypes
[typeid]);
6868 /* Decode simple location descriptions.
6869 Given a pointer to a dwarf block that defines a location, compute
6870 the location and return the value.
6872 FIXME: This is a kludge until we figure out a better
6873 way to handle the location descriptions.
6874 Gdb's design does not mesh well with the DWARF2 notion of a location
6875 computing interpreter, which is a shame because the flexibility goes unused.
6876 FIXME: Implement more operations as necessary.
6878 A location description containing no operations indicates that the
6879 object is optimized out. The global optimized_out flag is set for
6880 those, the return value is meaningless.
6882 When the result is a register number, the global isreg flag is set,
6883 otherwise it is cleared.
6885 When the result is a base register offset, the global offreg flag is set
6886 and the register number is returned in basereg, otherwise it is cleared.
6888 When the DW_OP_fbreg operation is encountered without a corresponding
6889 DW_AT_frame_base attribute, the global islocal flag is set.
6890 Hopefully the machine dependent code knows how to set up a virtual
6891 frame pointer for the local references.
6893 Note that stack[0] is unused except as a default error return.
6894 Note that stack overflow is not yet handled. */
6897 decode_locdesc (struct dwarf_block
*blk
, struct objfile
*objfile
,
6898 const struct comp_unit_head
*cu_header
)
6901 int size
= blk
->size
;
6902 char *data
= blk
->data
;
6903 CORE_ADDR stack
[64];
6905 unsigned int bytes_read
, unsnd
;
6955 stack
[++stacki
] = op
- DW_OP_lit0
;
6991 stack
[++stacki
] = op
- DW_OP_reg0
;
6996 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
6998 stack
[++stacki
] = unsnd
;
7034 basereg
= op
- DW_OP_breg0
;
7035 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
7041 basereg
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
7043 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
7048 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
7050 if (frame_base_reg
>= 0)
7053 basereg
= frame_base_reg
;
7054 stack
[stacki
] += frame_base_offset
;
7058 complaint (&symfile_complaints
,
7059 "DW_AT_frame_base missing for DW_OP_fbreg");
7065 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
7066 cu_header
, &bytes_read
);
7071 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
7076 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
7081 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
7086 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
7091 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
7096 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
7101 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
7107 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
7112 stack
[stacki
+ 1] = stack
[stacki
];
7117 stack
[stacki
- 1] += stack
[stacki
];
7121 case DW_OP_plus_uconst
:
7122 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
7127 stack
[stacki
- 1] -= stack
[stacki
];
7133 /* If we're not the last op, then we definitely can't encode
7134 this using GDB's address_class enum. */
7136 dwarf2_complex_location_expr_complaint ();
7139 case DW_OP_GNU_push_tls_address
:
7140 /* The top of the stack has the offset from the beginning
7141 of the thread control block at which the variable is located. */
7142 /* Nothing should follow this operator, so the top of stack would
7145 dwarf2_complex_location_expr_complaint ();
7149 complaint (&symfile_complaints
, "unsupported stack op: '%s'",
7150 dwarf_stack_op_name (op
));
7151 return (stack
[stacki
]);
7154 return (stack
[stacki
]);
7157 /* memory allocation interface */
7161 dwarf2_free_tmp_obstack (void *ignore
)
7163 obstack_free (&dwarf2_tmp_obstack
, NULL
);
7166 static struct dwarf_block
*
7167 dwarf_alloc_block (void)
7169 struct dwarf_block
*blk
;
7171 blk
= (struct dwarf_block
*)
7172 obstack_alloc (&dwarf2_tmp_obstack
, sizeof (struct dwarf_block
));
7176 static struct abbrev_info
*
7177 dwarf_alloc_abbrev (void)
7179 struct abbrev_info
*abbrev
;
7181 abbrev
= (struct abbrev_info
*) xmalloc (sizeof (struct abbrev_info
));
7182 memset (abbrev
, 0, sizeof (struct abbrev_info
));
7186 static struct die_info
*
7187 dwarf_alloc_die (void)
7189 struct die_info
*die
;
7191 die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
7192 memset (die
, 0, sizeof (struct die_info
));
7197 /* Macro support. */
7200 /* Return the full name of file number I in *LH's file name table.
7201 Use COMP_DIR as the name of the current directory of the
7202 compilation. The result is allocated using xmalloc; the caller is
7203 responsible for freeing it. */
7205 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
7207 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
7209 if (IS_ABSOLUTE_PATH (fe
->name
))
7210 return xstrdup (fe
->name
);
7218 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7224 dir_len
= strlen (dir
);
7225 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
7226 strcpy (full_name
, dir
);
7227 full_name
[dir_len
] = '/';
7228 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
7232 return xstrdup (fe
->name
);
7237 static struct macro_source_file
*
7238 macro_start_file (int file
, int line
,
7239 struct macro_source_file
*current_file
,
7240 const char *comp_dir
,
7241 struct line_header
*lh
, struct objfile
*objfile
)
7243 /* The full name of this source file. */
7244 char *full_name
= file_full_name (file
, lh
, comp_dir
);
7246 /* We don't create a macro table for this compilation unit
7247 at all until we actually get a filename. */
7248 if (! pending_macros
)
7249 pending_macros
= new_macro_table (&objfile
->symbol_obstack
,
7250 objfile
->macro_cache
);
7253 /* If we have no current file, then this must be the start_file
7254 directive for the compilation unit's main source file. */
7255 current_file
= macro_set_main (pending_macros
, full_name
);
7257 current_file
= macro_include (current_file
, line
, full_name
);
7261 return current_file
;
7265 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
7266 followed by a null byte. */
7268 copy_string (const char *buf
, int len
)
7270 char *s
= xmalloc (len
+ 1);
7271 memcpy (s
, buf
, len
);
7279 consume_improper_spaces (const char *p
, const char *body
)
7283 complaint (&symfile_complaints
,
7284 "macro definition contains spaces in formal argument list:\n`%s'",
7296 parse_macro_definition (struct macro_source_file
*file
, int line
,
7301 /* The body string takes one of two forms. For object-like macro
7302 definitions, it should be:
7304 <macro name> " " <definition>
7306 For function-like macro definitions, it should be:
7308 <macro name> "() " <definition>
7310 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
7312 Spaces may appear only where explicitly indicated, and in the
7315 The Dwarf 2 spec says that an object-like macro's name is always
7316 followed by a space, but versions of GCC around March 2002 omit
7317 the space when the macro's definition is the empty string.
7319 The Dwarf 2 spec says that there should be no spaces between the
7320 formal arguments in a function-like macro's formal argument list,
7321 but versions of GCC around March 2002 include spaces after the
7325 /* Find the extent of the macro name. The macro name is terminated
7326 by either a space or null character (for an object-like macro) or
7327 an opening paren (for a function-like macro). */
7328 for (p
= body
; *p
; p
++)
7329 if (*p
== ' ' || *p
== '(')
7332 if (*p
== ' ' || *p
== '\0')
7334 /* It's an object-like macro. */
7335 int name_len
= p
- body
;
7336 char *name
= copy_string (body
, name_len
);
7337 const char *replacement
;
7340 replacement
= body
+ name_len
+ 1;
7343 dwarf2_macro_malformed_definition_complaint (body
);
7344 replacement
= body
+ name_len
;
7347 macro_define_object (file
, line
, name
, replacement
);
7353 /* It's a function-like macro. */
7354 char *name
= copy_string (body
, p
- body
);
7357 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
7361 p
= consume_improper_spaces (p
, body
);
7363 /* Parse the formal argument list. */
7364 while (*p
&& *p
!= ')')
7366 /* Find the extent of the current argument name. */
7367 const char *arg_start
= p
;
7369 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
7372 if (! *p
|| p
== arg_start
)
7373 dwarf2_macro_malformed_definition_complaint (body
);
7376 /* Make sure argv has room for the new argument. */
7377 if (argc
>= argv_size
)
7380 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
7383 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
7386 p
= consume_improper_spaces (p
, body
);
7388 /* Consume the comma, if present. */
7393 p
= consume_improper_spaces (p
, body
);
7402 /* Perfectly formed definition, no complaints. */
7403 macro_define_function (file
, line
, name
,
7404 argc
, (const char **) argv
,
7406 else if (*p
== '\0')
7408 /* Complain, but do define it. */
7409 dwarf2_macro_malformed_definition_complaint (body
);
7410 macro_define_function (file
, line
, name
,
7411 argc
, (const char **) argv
,
7415 /* Just complain. */
7416 dwarf2_macro_malformed_definition_complaint (body
);
7419 /* Just complain. */
7420 dwarf2_macro_malformed_definition_complaint (body
);
7426 for (i
= 0; i
< argc
; i
++)
7432 dwarf2_macro_malformed_definition_complaint (body
);
7437 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
7438 char *comp_dir
, bfd
*abfd
,
7439 const struct comp_unit_head
*cu_header
,
7440 struct objfile
*objfile
)
7442 char *mac_ptr
, *mac_end
;
7443 struct macro_source_file
*current_file
= 0;
7445 if (dwarf_macinfo_buffer
== NULL
)
7447 complaint (&symfile_complaints
, "missing .debug_macinfo section");
7451 mac_ptr
= dwarf_macinfo_buffer
+ offset
;
7452 mac_end
= dwarf_macinfo_buffer
+ dwarf_macinfo_size
;
7456 enum dwarf_macinfo_record_type macinfo_type
;
7458 /* Do we at least have room for a macinfo type byte? */
7459 if (mac_ptr
>= mac_end
)
7461 dwarf2_macros_too_long_complaint ();
7465 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
7468 switch (macinfo_type
)
7470 /* A zero macinfo type indicates the end of the macro
7475 case DW_MACINFO_define
:
7476 case DW_MACINFO_undef
:
7482 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
7483 mac_ptr
+= bytes_read
;
7484 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
7485 mac_ptr
+= bytes_read
;
7488 complaint (&symfile_complaints
,
7489 "debug info gives macro %s outside of any file: %s",
7491 DW_MACINFO_define
? "definition" : macinfo_type
==
7492 DW_MACINFO_undef
? "undefinition" :
7493 "something-or-other", body
);
7496 if (macinfo_type
== DW_MACINFO_define
)
7497 parse_macro_definition (current_file
, line
, body
);
7498 else if (macinfo_type
== DW_MACINFO_undef
)
7499 macro_undef (current_file
, line
, body
);
7504 case DW_MACINFO_start_file
:
7509 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
7510 mac_ptr
+= bytes_read
;
7511 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
7512 mac_ptr
+= bytes_read
;
7514 current_file
= macro_start_file (file
, line
,
7515 current_file
, comp_dir
,
7520 case DW_MACINFO_end_file
:
7522 complaint (&symfile_complaints
,
7523 "macro debug info has an unmatched `close_file' directive");
7526 current_file
= current_file
->included_by
;
7529 enum dwarf_macinfo_record_type next_type
;
7531 /* GCC circa March 2002 doesn't produce the zero
7532 type byte marking the end of the compilation
7533 unit. Complain if it's not there, but exit no
7536 /* Do we at least have room for a macinfo type byte? */
7537 if (mac_ptr
>= mac_end
)
7539 dwarf2_macros_too_long_complaint ();
7543 /* We don't increment mac_ptr here, so this is just
7545 next_type
= read_1_byte (abfd
, mac_ptr
);
7547 complaint (&symfile_complaints
,
7548 "no terminating 0-type entry for macros in `.debug_macinfo' section");
7555 case DW_MACINFO_vendor_ext
:
7561 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
7562 mac_ptr
+= bytes_read
;
7563 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
7564 mac_ptr
+= bytes_read
;
7566 /* We don't recognize any vendor extensions. */
7573 /* Check if the attribute's form is a DW_FORM_block*
7574 if so return true else false. */
7576 attr_form_is_block (struct attribute
*attr
)
7578 return (attr
== NULL
? 0 :
7579 attr
->form
== DW_FORM_block1
7580 || attr
->form
== DW_FORM_block2
7581 || attr
->form
== DW_FORM_block4
7582 || attr
->form
== DW_FORM_block
);
7586 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
7587 const struct comp_unit_head
*cu_header
,
7588 struct objfile
*objfile
)
7590 if (attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
7592 struct dwarf2_loclist_baton
*baton
;
7594 baton
= obstack_alloc (&objfile
->symbol_obstack
,
7595 sizeof (struct dwarf2_loclist_baton
));
7596 baton
->objfile
= objfile
;
7598 /* We don't know how long the location list is, but make sure we
7599 don't run off the edge of the section. */
7600 baton
->size
= dwarf_loc_size
- DW_UNSND (attr
);
7601 baton
->data
= dwarf_loc_buffer
+ DW_UNSND (attr
);
7602 baton
->base_address
= cu_header
->base_address
;
7603 if (cu_header
->base_known
== 0)
7604 complaint (&symfile_complaints
,
7605 "Location list used without specifying the CU base address.");
7607 SYMBOL_LOCATION_FUNCS (sym
) = &dwarf2_loclist_funcs
;
7608 SYMBOL_LOCATION_BATON (sym
) = baton
;
7612 struct dwarf2_locexpr_baton
*baton
;
7614 baton
= obstack_alloc (&objfile
->symbol_obstack
,
7615 sizeof (struct dwarf2_locexpr_baton
));
7616 baton
->objfile
= objfile
;
7618 if (attr_form_is_block (attr
))
7620 /* Note that we're just copying the block's data pointer
7621 here, not the actual data. We're still pointing into the
7622 dwarf_info_buffer for SYM's objfile; right now we never
7623 release that buffer, but when we do clean up properly
7624 this may need to change. */
7625 baton
->size
= DW_BLOCK (attr
)->size
;
7626 baton
->data
= DW_BLOCK (attr
)->data
;
7630 dwarf2_invalid_attrib_class_complaint ("location description",
7631 SYMBOL_NATURAL_NAME (sym
));
7636 SYMBOL_LOCATION_FUNCS (sym
) = &dwarf2_locexpr_funcs
;
7637 SYMBOL_LOCATION_BATON (sym
) = baton
;