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5c2c6c95 ILT |
1 | // dwarf_reader.h -- parse dwarf2/3 debug information for gold -*- C++ -*- |
2 | ||
250d07de | 3 | // Copyright (C) 2007-2021 Free Software Foundation, Inc. |
5c2c6c95 ILT |
4 | // Written by Ian Lance Taylor <iant@google.com>. |
5 | ||
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
23 | #ifndef GOLD_DWARF_READER_H | |
24 | #define GOLD_DWARF_READER_H | |
25 | ||
26 | #include <vector> | |
4c50553d | 27 | #include <map> |
71ff8986 | 28 | #include <limits.h> |
c1027032 | 29 | #include <sys/types.h> |
5c2c6c95 | 30 | |
4c50553d | 31 | #include "elfcpp.h" |
5c2c6c95 ILT |
32 | #include "elfcpp_swap.h" |
33 | #include "dwarf.h" | |
24badc65 | 34 | #include "reloc.h" |
5c2c6c95 ILT |
35 | |
36 | namespace gold | |
37 | { | |
38 | ||
c1027032 | 39 | class Dwarf_info_reader; |
5c2c6c95 ILT |
40 | struct LineStateMachine; |
41 | ||
c1027032 CC |
42 | // This class is used to extract the section index and offset of |
43 | // the target of a relocation for a given offset within the section. | |
44 | ||
45 | class Elf_reloc_mapper | |
46 | { | |
47 | public: | |
48 | Elf_reloc_mapper() | |
49 | { } | |
50 | ||
51 | virtual | |
52 | ~Elf_reloc_mapper() | |
53 | { } | |
54 | ||
55 | // Initialize the relocation tracker for section RELOC_SHNDX. | |
56 | bool | |
57 | initialize(unsigned int reloc_shndx, unsigned int reloc_type) | |
58 | { return this->do_initialize(reloc_shndx, reloc_type); } | |
59 | ||
60 | // Return the next reloc_offset. | |
61 | off_t | |
62 | next_offset() | |
63 | { return this->do_next_offset(); } | |
64 | ||
65 | // Advance to the next relocation past OFFSET. | |
66 | void | |
67 | advance(off_t offset) | |
68 | { this->do_advance(offset); } | |
69 | ||
70 | // Return the section index and offset within the section of the target | |
71 | // of the relocation for RELOC_OFFSET in the referring section. | |
72 | unsigned int | |
73 | get_reloc_target(off_t reloc_offset, off_t* target_offset) | |
74 | { return this->do_get_reloc_target(reloc_offset, target_offset); } | |
75 | ||
76 | // Checkpoint the current position in the reloc section. | |
77 | uint64_t | |
78 | checkpoint() const | |
79 | { return this->do_checkpoint(); } | |
80 | ||
81 | // Reset the current position to the CHECKPOINT. | |
82 | void | |
83 | reset(uint64_t checkpoint) | |
84 | { this->do_reset(checkpoint); } | |
85 | ||
86 | protected: | |
87 | virtual bool | |
88 | do_initialize(unsigned int, unsigned int) = 0; | |
89 | ||
90 | // Return the next reloc_offset. | |
91 | virtual off_t | |
92 | do_next_offset() = 0; | |
93 | ||
94 | // Advance to the next relocation past OFFSET. | |
95 | virtual void | |
96 | do_advance(off_t offset) = 0; | |
97 | ||
98 | virtual unsigned int | |
99 | do_get_reloc_target(off_t reloc_offset, off_t* target_offset) = 0; | |
100 | ||
101 | // Checkpoint the current position in the reloc section. | |
102 | virtual uint64_t | |
103 | do_checkpoint() const = 0; | |
104 | ||
105 | // Reset the current position to the CHECKPOINT. | |
106 | virtual void | |
107 | do_reset(uint64_t checkpoint) = 0; | |
108 | }; | |
109 | ||
110 | template<int size, bool big_endian> | |
111 | class Sized_elf_reloc_mapper : public Elf_reloc_mapper | |
112 | { | |
113 | public: | |
114 | Sized_elf_reloc_mapper(Object* object, const unsigned char* symtab, | |
115 | off_t symtab_size) | |
116 | : object_(object), symtab_(symtab), symtab_size_(symtab_size), | |
117 | reloc_type_(0), track_relocs_() | |
118 | { } | |
119 | ||
120 | protected: | |
121 | bool | |
122 | do_initialize(unsigned int reloc_shndx, unsigned int reloc_type); | |
123 | ||
124 | // Return the next reloc_offset. | |
125 | virtual off_t | |
126 | do_next_offset() | |
127 | { return this->track_relocs_.next_offset(); } | |
128 | ||
129 | // Advance to the next relocation past OFFSET. | |
130 | virtual void | |
131 | do_advance(off_t offset) | |
132 | { this->track_relocs_.advance(offset); } | |
133 | ||
134 | unsigned int | |
135 | do_get_reloc_target(off_t reloc_offset, off_t* target_offset); | |
136 | ||
137 | // Checkpoint the current position in the reloc section. | |
138 | uint64_t | |
139 | do_checkpoint() const | |
140 | { return this->track_relocs_.checkpoint(); } | |
141 | ||
142 | // Reset the current position to the CHECKPOINT. | |
143 | void | |
144 | do_reset(uint64_t checkpoint) | |
145 | { this->track_relocs_.reset(checkpoint); } | |
146 | ||
147 | private: | |
148 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
149 | ||
150 | // Return the section index of symbol SYMNDX, and copy its value to *VALUE. | |
151 | // Set *IS_ORDINARY true if the section index is an ordinary section index. | |
152 | unsigned int | |
153 | symbol_section(unsigned int symndx, Address* value, bool* is_ordinary); | |
154 | ||
155 | // The object file. | |
156 | Object* object_; | |
157 | // The ELF symbol table. | |
158 | const unsigned char* symtab_; | |
159 | // The size of the ELF symbol table. | |
160 | off_t symtab_size_; | |
161 | // Type of the relocation section (SHT_REL or SHT_RELA). | |
162 | unsigned int reloc_type_; | |
163 | // Relocations for the referring section. | |
164 | Track_relocs<size, big_endian> track_relocs_; | |
165 | }; | |
166 | ||
167 | // This class is used to read the abbreviations table from the | |
168 | // .debug_abbrev section of the object file. | |
169 | ||
170 | class Dwarf_abbrev_table | |
171 | { | |
172 | public: | |
173 | // An attribute list entry. | |
174 | struct Attribute | |
175 | { | |
5cde809b CC |
176 | Attribute(unsigned int a, unsigned int f, int c) |
177 | : attr(a), form(f), implicit_const(c) | |
c1027032 CC |
178 | { } |
179 | unsigned int attr; | |
180 | unsigned int form; | |
5cde809b | 181 | int implicit_const; |
c1027032 CC |
182 | }; |
183 | ||
184 | // An abbrev code entry. | |
185 | struct Abbrev_code | |
186 | { | |
187 | Abbrev_code(unsigned int t, bool hc) | |
188 | : tag(t), has_children(hc), has_sibling_attribute(false), attributes() | |
189 | { | |
190 | this->attributes.reserve(10); | |
191 | } | |
192 | ||
193 | void | |
5cde809b | 194 | add_attribute(unsigned int attr, unsigned int form, int implicit_const) |
c1027032 | 195 | { |
5cde809b | 196 | this->attributes.push_back(Attribute(attr, form, implicit_const)); |
c1027032 CC |
197 | } |
198 | ||
199 | // The DWARF tag. | |
200 | unsigned int tag; | |
201 | // True if the DIE has children. | |
202 | bool has_children : 1; | |
203 | // True if the DIE has a sibling attribute. | |
204 | bool has_sibling_attribute : 1; | |
205 | // The list of attributes and forms. | |
206 | std::vector<Attribute> attributes; | |
207 | }; | |
208 | ||
209 | Dwarf_abbrev_table() | |
210 | : abbrev_shndx_(0), abbrev_offset_(0), buffer_(NULL), buffer_end_(NULL), | |
211 | owns_buffer_(false), buffer_pos_(NULL), high_abbrev_codes_() | |
212 | { | |
213 | memset(this->low_abbrev_codes_, 0, sizeof(this->low_abbrev_codes_)); | |
214 | } | |
215 | ||
216 | ~Dwarf_abbrev_table() | |
217 | { | |
218 | if (this->owns_buffer_ && this->buffer_ != NULL) | |
219 | delete[] this->buffer_; | |
220 | this->clear_abbrev_codes(); | |
221 | } | |
222 | ||
223 | // Read the abbrev table from an object file. | |
224 | bool | |
225 | read_abbrevs(Relobj* object, | |
226 | unsigned int abbrev_shndx, | |
227 | off_t abbrev_offset) | |
228 | { | |
229 | // If we've already read this abbrev table, return immediately. | |
230 | if (this->abbrev_shndx_ > 0 | |
231 | && this->abbrev_shndx_ == abbrev_shndx | |
232 | && this->abbrev_offset_ == abbrev_offset) | |
233 | return true; | |
234 | return this->do_read_abbrevs(object, abbrev_shndx, abbrev_offset); | |
235 | } | |
236 | ||
237 | // Return the abbrev code entry for CODE. This is a fast path for | |
238 | // abbrev codes that are in the direct lookup table. If not found | |
239 | // there, we call do_get_abbrev() to do the hard work. | |
240 | const Abbrev_code* | |
241 | get_abbrev(unsigned int code) | |
242 | { | |
243 | if (code < this->low_abbrev_code_max_ | |
244 | && this->low_abbrev_codes_[code] != NULL) | |
245 | return this->low_abbrev_codes_[code]; | |
246 | return this->do_get_abbrev(code); | |
247 | } | |
248 | ||
249 | private: | |
250 | // Read the abbrev table from an object file. | |
251 | bool | |
252 | do_read_abbrevs(Relobj* object, | |
253 | unsigned int abbrev_shndx, | |
254 | off_t abbrev_offset); | |
255 | ||
256 | // Lookup the abbrev code entry for CODE. | |
257 | const Abbrev_code* | |
258 | do_get_abbrev(unsigned int code); | |
259 | ||
260 | // Store an abbrev code entry for CODE. | |
261 | void | |
262 | store_abbrev(unsigned int code, const Abbrev_code* entry) | |
263 | { | |
264 | if (code < this->low_abbrev_code_max_) | |
265 | this->low_abbrev_codes_[code] = entry; | |
266 | else | |
267 | this->high_abbrev_codes_[code] = entry; | |
268 | } | |
269 | ||
270 | // Clear the abbrev code table and release the memory it uses. | |
271 | void | |
272 | clear_abbrev_codes(); | |
273 | ||
274 | typedef Unordered_map<unsigned int, const Abbrev_code*> Abbrev_code_table; | |
275 | ||
276 | // The section index of the current abbrev table. | |
277 | unsigned int abbrev_shndx_; | |
278 | // The offset within the section of the current abbrev table. | |
279 | off_t abbrev_offset_; | |
280 | // The buffer containing the .debug_abbrev section. | |
281 | const unsigned char* buffer_; | |
282 | const unsigned char* buffer_end_; | |
283 | // True if this object owns the buffer and needs to delete it. | |
284 | bool owns_buffer_; | |
285 | // Pointer to the current position in the buffer. | |
286 | const unsigned char* buffer_pos_; | |
287 | // The table of abbrev codes. | |
288 | // We use a direct-lookup array for low abbrev codes, | |
289 | // and store the rest in a hash table. | |
290 | static const unsigned int low_abbrev_code_max_ = 256; | |
291 | const Abbrev_code* low_abbrev_codes_[low_abbrev_code_max_]; | |
292 | Abbrev_code_table high_abbrev_codes_; | |
293 | }; | |
294 | ||
295 | // A DWARF range list. The start and end offsets are relative | |
296 | // to the input section SHNDX. Each range must lie entirely | |
297 | // within a single section. | |
298 | ||
299 | class Dwarf_range_list | |
300 | { | |
301 | public: | |
302 | struct Range | |
303 | { | |
304 | Range(unsigned int a_shndx, off_t a_start, off_t a_end) | |
305 | : shndx(a_shndx), start(a_start), end(a_end) | |
306 | { } | |
307 | ||
308 | unsigned int shndx; | |
309 | off_t start; | |
310 | off_t end; | |
311 | }; | |
312 | ||
313 | Dwarf_range_list() | |
314 | : range_list_() | |
315 | { } | |
316 | ||
317 | void | |
318 | add(unsigned int shndx, off_t start, off_t end) | |
319 | { this->range_list_.push_back(Range(shndx, start, end)); } | |
320 | ||
321 | size_t | |
322 | size() const | |
323 | { return this->range_list_.size(); } | |
324 | ||
325 | const Range& | |
326 | operator[](off_t i) const | |
327 | { return this->range_list_[i]; } | |
328 | ||
329 | private: | |
330 | std::vector<Range> range_list_; | |
331 | }; | |
332 | ||
333 | // This class is used to read the ranges table from the | |
334 | // .debug_ranges section of the object file. | |
335 | ||
336 | class Dwarf_ranges_table | |
337 | { | |
338 | public: | |
ed5d6712 CC |
339 | Dwarf_ranges_table(Dwarf_info_reader* dwinfo) |
340 | : dwinfo_(dwinfo), ranges_shndx_(0), ranges_buffer_(NULL), | |
341 | ranges_buffer_end_(NULL), owns_ranges_buffer_(false), | |
267257d2 | 342 | ranges_reloc_mapper_(NULL), reloc_type_(0), output_section_offset_(0) |
c1027032 CC |
343 | { } |
344 | ||
345 | ~Dwarf_ranges_table() | |
346 | { | |
347 | if (this->owns_ranges_buffer_ && this->ranges_buffer_ != NULL) | |
348 | delete[] this->ranges_buffer_; | |
349 | if (this->ranges_reloc_mapper_ != NULL) | |
350 | delete this->ranges_reloc_mapper_; | |
351 | } | |
352 | ||
5cde809b | 353 | // Fetch the contents of the ranges table from an object file. |
c1027032 CC |
354 | bool |
355 | read_ranges_table(Relobj* object, | |
356 | const unsigned char* symtab, | |
357 | off_t symtab_size, | |
5cde809b CC |
358 | unsigned int ranges_shndx, |
359 | unsigned int version); | |
c1027032 | 360 | |
5cde809b | 361 | // Read the DWARF 2/3/4 range table. |
c1027032 CC |
362 | Dwarf_range_list* |
363 | read_range_list(Relobj* object, | |
364 | const unsigned char* symtab, | |
365 | off_t symtab_size, | |
366 | unsigned int address_size, | |
367 | unsigned int ranges_shndx, | |
368 | off_t ranges_offset); | |
369 | ||
5cde809b CC |
370 | // Read the DWARF 5 rnglists table. |
371 | Dwarf_range_list* | |
372 | read_range_list_v5(Relobj* object, | |
373 | const unsigned char* symtab, | |
374 | off_t symtab_size, | |
375 | unsigned int address_size, | |
376 | unsigned int ranges_shndx, | |
377 | off_t ranges_offset); | |
378 | ||
267257d2 CC |
379 | // Look for a relocation at offset OFF in the range table, |
380 | // and return the section index and offset of the target. | |
381 | unsigned int | |
382 | lookup_reloc(off_t off, off_t* target_off); | |
383 | ||
c1027032 | 384 | private: |
ed5d6712 CC |
385 | // The Dwarf_info_reader, for reading data. |
386 | Dwarf_info_reader* dwinfo_; | |
c1027032 CC |
387 | // The section index of the ranges table. |
388 | unsigned int ranges_shndx_; | |
389 | // The buffer containing the .debug_ranges section. | |
390 | const unsigned char* ranges_buffer_; | |
391 | const unsigned char* ranges_buffer_end_; | |
392 | // True if this object owns the buffer and needs to delete it. | |
393 | bool owns_ranges_buffer_; | |
394 | // Relocation mapper for the .debug_ranges section. | |
395 | Elf_reloc_mapper* ranges_reloc_mapper_; | |
267257d2 CC |
396 | // Type of the relocation section (SHT_REL or SHT_RELA). |
397 | unsigned int reloc_type_; | |
c1027032 CC |
398 | // For incremental update links, this will hold the offset of the |
399 | // input section within the output section. Offsets read from | |
400 | // relocated data will be relative to the output section, and need | |
401 | // to be corrected before reading data from the input section. | |
402 | uint64_t output_section_offset_; | |
403 | }; | |
404 | ||
405 | // This class is used to read the pubnames and pubtypes tables from the | |
406 | // .debug_pubnames and .debug_pubtypes sections of the object file. | |
407 | ||
408 | class Dwarf_pubnames_table | |
409 | { | |
410 | public: | |
ed5d6712 CC |
411 | Dwarf_pubnames_table(Dwarf_info_reader* dwinfo, bool is_pubtypes) |
412 | : dwinfo_(dwinfo), buffer_(NULL), buffer_end_(NULL), owns_buffer_(false), | |
ec673e64 CC |
413 | offset_size_(0), pinfo_(NULL), end_of_table_(NULL), |
414 | is_pubtypes_(is_pubtypes), is_gnu_style_(false), | |
4320c691 | 415 | unit_length_(0), cu_offset_(0) |
c1027032 CC |
416 | { } |
417 | ||
418 | ~Dwarf_pubnames_table() | |
419 | { | |
420 | if (this->owns_buffer_ && this->buffer_ != NULL) | |
421 | delete[] this->buffer_; | |
422 | } | |
423 | ||
234d4ab8 SA |
424 | // Read the pubnames section from the object file, using the symbol |
425 | // table for relocating it. | |
c1027032 | 426 | bool |
234d4ab8 SA |
427 | read_section(Relobj* object, const unsigned char* symbol_table, |
428 | off_t symtab_size); | |
c1027032 CC |
429 | |
430 | // Read the header for the set at OFFSET. | |
431 | bool | |
432 | read_header(off_t offset); | |
433 | ||
234d4ab8 SA |
434 | // Return the offset to the cu within the info or types section. |
435 | off_t | |
436 | cu_offset() | |
437 | { return this->cu_offset_; } | |
438 | ||
439 | // Return the size of this subsection of the table. The unit length | |
440 | // doesn't include the size of its own field. | |
441 | off_t | |
442 | subsection_size() | |
443 | { return this->unit_length_; } | |
444 | ||
ec673e64 CC |
445 | // Read the next name from the set. If the pubname table is gnu-style, |
446 | // FLAG_BYTE is set to the high-byte of a gdb_index version 7 cu_index. | |
c1027032 | 447 | const char* |
ec673e64 | 448 | next_name(uint8_t* flag_byte); |
c1027032 CC |
449 | |
450 | private: | |
ed5d6712 CC |
451 | // The Dwarf_info_reader, for reading data. |
452 | Dwarf_info_reader* dwinfo_; | |
c1027032 CC |
453 | // The buffer containing the .debug_ranges section. |
454 | const unsigned char* buffer_; | |
455 | const unsigned char* buffer_end_; | |
456 | // True if this object owns the buffer and needs to delete it. | |
457 | bool owns_buffer_; | |
458 | // The size of a DWARF offset for the current set. | |
459 | unsigned int offset_size_; | |
460 | // The current position within the buffer. | |
461 | const unsigned char* pinfo_; | |
ec673e64 CC |
462 | // The end of the current pubnames table. |
463 | const unsigned char* end_of_table_; | |
c1027032 CC |
464 | // TRUE if this is a .debug_pubtypes section. |
465 | bool is_pubtypes_; | |
ec673e64 CC |
466 | // Gnu-style pubnames table. This style has an extra flag byte between the |
467 | // offset and the name, and is used for generating version 7 of gdb-index. | |
468 | bool is_gnu_style_; | |
234d4ab8 SA |
469 | // Fields read from the header. |
470 | uint64_t unit_length_; | |
471 | off_t cu_offset_; | |
472 | ||
473 | // Track relocations for this table so we can find the CUs that | |
474 | // correspond to the subsections. | |
475 | Elf_reloc_mapper* reloc_mapper_; | |
476 | // Type of the relocation section (SHT_REL or SHT_RELA). | |
477 | unsigned int reloc_type_; | |
c1027032 CC |
478 | }; |
479 | ||
480 | // This class represents a DWARF Debug Info Entry (DIE). | |
481 | ||
482 | class Dwarf_die | |
483 | { | |
484 | public: | |
485 | // An attribute value. | |
486 | struct Attribute_value | |
487 | { | |
488 | unsigned int attr; | |
489 | unsigned int form; | |
490 | union | |
491 | { | |
492 | int64_t intval; | |
493 | uint64_t uintval; | |
494 | const char* stringval; | |
495 | const unsigned char* blockval; | |
496 | off_t refval; | |
497 | } val; | |
498 | union | |
499 | { | |
500 | // Section index for reference forms. | |
501 | unsigned int shndx; | |
502 | // Block length for block forms. | |
503 | unsigned int blocklen; | |
c1027032 CC |
504 | } aux; |
505 | }; | |
506 | ||
507 | // A list of attribute values. | |
508 | typedef std::vector<Attribute_value> Attributes; | |
509 | ||
510 | Dwarf_die(Dwarf_info_reader* dwinfo, | |
511 | off_t die_offset, | |
512 | Dwarf_die* parent); | |
513 | ||
514 | // Return the DWARF tag for this DIE. | |
515 | unsigned int | |
516 | tag() const | |
517 | { | |
518 | if (this->abbrev_code_ == NULL) | |
519 | return 0; | |
520 | return this->abbrev_code_->tag; | |
521 | } | |
522 | ||
523 | // Return true if this DIE has children. | |
524 | bool | |
525 | has_children() const | |
526 | { | |
527 | gold_assert(this->abbrev_code_ != NULL); | |
528 | return this->abbrev_code_->has_children; | |
529 | } | |
530 | ||
531 | // Return true if this DIE has a sibling attribute. | |
532 | bool | |
533 | has_sibling_attribute() const | |
534 | { | |
535 | gold_assert(this->abbrev_code_ != NULL); | |
536 | return this->abbrev_code_->has_sibling_attribute; | |
537 | } | |
538 | ||
539 | // Return the value of attribute ATTR. | |
540 | const Attribute_value* | |
541 | attribute(unsigned int attr); | |
542 | ||
543 | // Return the value of the DW_AT_name attribute. | |
544 | const char* | |
545 | name() | |
546 | { | |
547 | if (this->name_ == NULL) | |
548 | this->set_name(); | |
549 | return this->name_; | |
550 | } | |
551 | ||
552 | // Return the value of the DW_AT_linkage_name | |
553 | // or DW_AT_MIPS_linkage_name attribute. | |
554 | const char* | |
555 | linkage_name() | |
556 | { | |
557 | if (this->linkage_name_ == NULL) | |
558 | this->set_linkage_name(); | |
559 | return this->linkage_name_; | |
560 | } | |
561 | ||
562 | // Return the value of the DW_AT_specification attribute. | |
563 | off_t | |
564 | specification() | |
565 | { | |
566 | if (!this->attributes_read_) | |
567 | this->read_attributes(); | |
568 | return this->specification_; | |
569 | } | |
570 | ||
571 | // Return the value of the DW_AT_abstract_origin attribute. | |
572 | off_t | |
573 | abstract_origin() | |
574 | { | |
575 | if (!this->attributes_read_) | |
576 | this->read_attributes(); | |
577 | return this->abstract_origin_; | |
578 | } | |
579 | ||
580 | // Return the value of attribute ATTR as a string. | |
581 | const char* | |
582 | string_attribute(unsigned int attr); | |
583 | ||
584 | // Return the value of attribute ATTR as an integer. | |
585 | int64_t | |
586 | int_attribute(unsigned int attr); | |
587 | ||
588 | // Return the value of attribute ATTR as an unsigned integer. | |
589 | uint64_t | |
590 | uint_attribute(unsigned int attr); | |
591 | ||
592 | // Return the value of attribute ATTR as a reference. | |
593 | off_t | |
57923f48 MW |
594 | ref_attribute(unsigned int attr, unsigned int* shndx); |
595 | ||
596 | // Return the value of attribute ATTR as a address. | |
597 | off_t | |
598 | address_attribute(unsigned int attr, unsigned int* shndx); | |
c1027032 CC |
599 | |
600 | // Return the value of attribute ATTR as a flag. | |
601 | bool | |
602 | flag_attribute(unsigned int attr) | |
603 | { return this->int_attribute(attr) != 0; } | |
604 | ||
605 | // Return true if this DIE is a declaration. | |
606 | bool | |
607 | is_declaration() | |
608 | { return this->flag_attribute(elfcpp::DW_AT_declaration); } | |
609 | ||
610 | // Return the parent of this DIE. | |
611 | Dwarf_die* | |
612 | parent() const | |
613 | { return this->parent_; } | |
614 | ||
615 | // Return the offset of this DIE. | |
616 | off_t | |
617 | offset() const | |
618 | { return this->die_offset_; } | |
619 | ||
620 | // Return the offset of this DIE's first child. | |
621 | off_t | |
622 | child_offset(); | |
623 | ||
624 | // Set the offset of this DIE's next sibling. | |
625 | void | |
626 | set_sibling_offset(off_t sibling_offset) | |
627 | { this->sibling_offset_ = sibling_offset; } | |
628 | ||
629 | // Return the offset of this DIE's next sibling. | |
630 | off_t | |
631 | sibling_offset(); | |
632 | ||
633 | private: | |
634 | typedef Dwarf_abbrev_table::Abbrev_code Abbrev_code; | |
635 | ||
636 | // Read all the attributes of the DIE. | |
637 | bool | |
638 | read_attributes(); | |
639 | ||
640 | // Set the name of the DIE if present. | |
641 | void | |
642 | set_name(); | |
643 | ||
644 | // Set the linkage name if present. | |
645 | void | |
646 | set_linkage_name(); | |
647 | ||
648 | // Skip all the attributes of the DIE and return the offset | |
649 | // of the next DIE. | |
650 | off_t | |
651 | skip_attributes(); | |
652 | ||
653 | // The Dwarf_info_reader, for reading attributes. | |
654 | Dwarf_info_reader* dwinfo_; | |
655 | // The parent of this DIE. | |
656 | Dwarf_die* parent_; | |
657 | // Offset of this DIE within its compilation unit. | |
658 | off_t die_offset_; | |
659 | // Offset of the first attribute, relative to the beginning of the DIE. | |
660 | off_t attr_offset_; | |
661 | // Offset of the first child, relative to the compilation unit. | |
662 | off_t child_offset_; | |
663 | // Offset of the next sibling, relative to the compilation unit. | |
664 | off_t sibling_offset_; | |
665 | // The abbreviation table entry. | |
666 | const Abbrev_code* abbrev_code_; | |
667 | // The list of attributes. | |
668 | Attributes attributes_; | |
669 | // True if the attributes have been read. | |
670 | bool attributes_read_; | |
671 | // The following fields hold common attributes to avoid a linear | |
672 | // search through the attribute list. | |
673 | // The DIE name (DW_AT_name). | |
674 | const char* name_; | |
675 | // Offset of the name in the string table (for DW_FORM_strp). | |
676 | off_t name_off_; | |
677 | // The linkage name (DW_AT_linkage_name or DW_AT_MIPS_linkage_name). | |
678 | const char* linkage_name_; | |
679 | // Offset of the linkage name in the string table (for DW_FORM_strp). | |
680 | off_t linkage_name_off_; | |
681 | // Section index of the string table (for DW_FORM_strp). | |
682 | unsigned int string_shndx_; | |
683 | // The value of a DW_AT_specification attribute. | |
684 | off_t specification_; | |
685 | // The value of a DW_AT_abstract_origin attribute. | |
686 | off_t abstract_origin_; | |
687 | }; | |
688 | ||
689 | // This class is used to read the debug info from the .debug_info | |
690 | // or .debug_types sections. This is a base class that implements | |
691 | // the generic parsing of the compilation unit header and DIE | |
692 | // structure. The parse() method parses the entire section, and | |
693 | // calls the various visit_xxx() methods for each header. Clients | |
694 | // should derive a new class from this one and implement the | |
695 | // visit_compilation_unit() and visit_type_unit() functions. | |
5cde809b CC |
696 | // IS_TYPE_UNIT is true if we are reading from a .debug_types section, |
697 | // which is used only in DWARF 4. For DWARF 5, it will be false, | |
698 | // and we will determine whether it's a type init when we parse the | |
699 | // header. | |
c1027032 CC |
700 | |
701 | class Dwarf_info_reader | |
702 | { | |
703 | public: | |
704 | Dwarf_info_reader(bool is_type_unit, | |
705 | Relobj* object, | |
706 | const unsigned char* symtab, | |
707 | off_t symtab_size, | |
708 | unsigned int shndx, | |
709 | unsigned int reloc_shndx, | |
710 | unsigned int reloc_type) | |
5cde809b | 711 | : object_(object), symtab_(symtab), |
c1027032 | 712 | symtab_size_(symtab_size), shndx_(shndx), reloc_shndx_(reloc_shndx), |
8787852d CC |
713 | reloc_type_(reloc_type), abbrev_shndx_(0), string_shndx_(0), |
714 | buffer_(NULL), buffer_end_(NULL), cu_offset_(0), cu_length_(0), | |
43819297 RM |
715 | offset_size_(0), address_size_(0), cu_version_(0), |
716 | abbrev_table_(), ranges_table_(this), | |
ed5d6712 | 717 | reloc_mapper_(NULL), string_buffer_(NULL), string_buffer_end_(NULL), |
8787852d | 718 | owns_string_buffer_(false), string_output_section_offset_(0) |
5cde809b CC |
719 | { |
720 | // For DWARF 4, we infer the unit type from the section name. | |
721 | // For DWARF 5, we will read this from the unit header. | |
722 | this->unit_type_ = | |
723 | (is_type_unit ? elfcpp::DW_UT_type : elfcpp::DW_UT_compile); | |
724 | } | |
c1027032 CC |
725 | |
726 | virtual | |
727 | ~Dwarf_info_reader() | |
728 | { | |
729 | if (this->reloc_mapper_ != NULL) | |
730 | delete this->reloc_mapper_; | |
731 | if (this->owns_string_buffer_ && this->string_buffer_ != NULL) | |
732 | delete[] this->string_buffer_; | |
733 | } | |
734 | ||
5cde809b CC |
735 | bool |
736 | is_type_unit() const | |
737 | { | |
738 | return (this->unit_type_ == elfcpp::DW_UT_type | |
739 | || this->unit_type_ == elfcpp::DW_UT_split_type); | |
740 | } | |
741 | ||
c1027032 CC |
742 | // Begin parsing the debug info. This calls visit_compilation_unit() |
743 | // or visit_type_unit() for each compilation or type unit found in the | |
744 | // section, and visit_die() for each top-level DIE. | |
745 | void | |
746 | parse(); | |
747 | ||
748 | // Return the abbrev code entry for a CODE. | |
749 | const Dwarf_abbrev_table::Abbrev_code* | |
750 | get_abbrev(unsigned int code) | |
751 | { return this->abbrev_table_.get_abbrev(code); } | |
752 | ||
753 | // Return a pointer to the DWARF info buffer at OFFSET. | |
754 | const unsigned char* | |
755 | buffer_at_offset(off_t offset) const | |
756 | { | |
757 | const unsigned char* p = this->buffer_ + this->cu_offset_ + offset; | |
758 | if (this->check_buffer(p + 1)) | |
759 | return p; | |
760 | return NULL; | |
761 | } | |
762 | ||
ed5d6712 CC |
763 | // Read a possibly unaligned integer of SIZE. |
764 | template <int valsize> | |
765 | inline typename elfcpp::Valtype_base<valsize>::Valtype | |
766 | read_from_pointer(const unsigned char* source); | |
767 | ||
768 | // Read a possibly unaligned integer of SIZE. Update SOURCE after read. | |
769 | template <int valsize> | |
770 | inline typename elfcpp::Valtype_base<valsize>::Valtype | |
771 | read_from_pointer(const unsigned char** source); | |
772 | ||
5cde809b CC |
773 | inline typename elfcpp::Valtype_base<32>::Valtype |
774 | read_3bytes_from_pointer(const unsigned char** source); | |
775 | ||
c1027032 CC |
776 | // Look for a relocation at offset ATTR_OFF in the dwarf info, |
777 | // and return the section index and offset of the target. | |
778 | unsigned int | |
779 | lookup_reloc(off_t attr_off, off_t* target_off); | |
780 | ||
781 | // Return a string from the DWARF string table. | |
782 | const char* | |
783 | get_string(off_t str_off, unsigned int string_shndx); | |
784 | ||
785 | // Return the size of a DWARF offset. | |
786 | unsigned int | |
787 | offset_size() const | |
788 | { return this->offset_size_; } | |
789 | ||
790 | // Return the size of an address. | |
791 | unsigned int | |
792 | address_size() const | |
793 | { return this->address_size_; } | |
794 | ||
20dd9c21 CC |
795 | // Return the size of a DW_FORM_ref_addr. |
796 | // In DWARF v2, this was the size of an address; in DWARF v3 and later, | |
797 | // it is the size of an DWARF offset. | |
798 | unsigned int | |
799 | ref_addr_size() const | |
800 | { return this->cu_version_ > 2 ? this->offset_size_ : this->address_size_; } | |
801 | ||
8787852d CC |
802 | // Set the section index of the .debug_abbrev section. |
803 | // We use this if there are no relocations for the .debug_info section. | |
804 | // If not set, the code parse() routine will search for the section by name. | |
805 | void | |
806 | set_abbrev_shndx(unsigned int abbrev_shndx) | |
807 | { this->abbrev_shndx_ = abbrev_shndx; } | |
808 | ||
234d4ab8 SA |
809 | // Return a pointer to the object file's ELF symbol table. |
810 | const unsigned char* | |
811 | symtab() const | |
812 | { return this->symtab_; } | |
813 | ||
814 | // Return the size of the object file's ELF symbol table. | |
815 | off_t | |
816 | symtab_size() const | |
817 | { return this->symtab_size_; } | |
818 | ||
819 | // Return the offset of the current compilation unit. | |
820 | off_t | |
821 | cu_offset() const | |
822 | { return this->cu_offset_; } | |
823 | ||
c1027032 CC |
824 | protected: |
825 | // Begin parsing the debug info. This calls visit_compilation_unit() | |
826 | // or visit_type_unit() for each compilation or type unit found in the | |
827 | // section, and visit_die() for each top-level DIE. | |
828 | template<bool big_endian> | |
829 | void | |
830 | do_parse(); | |
831 | ||
832 | // The following methods are hooks that are meant to be implemented | |
833 | // by a derived class. A default, do-nothing, implementation of | |
834 | // each is provided for this base class. | |
835 | ||
836 | // Visit a compilation unit. | |
837 | virtual void | |
838 | visit_compilation_unit(off_t cu_offset, off_t cu_length, Dwarf_die* root_die); | |
839 | ||
840 | // Visit a type unit. | |
841 | virtual void | |
908794a9 CC |
842 | visit_type_unit(off_t tu_offset, off_t tu_length, off_t type_offset, |
843 | uint64_t signature, Dwarf_die* root_die); | |
c1027032 CC |
844 | |
845 | // Read the range table. | |
846 | Dwarf_range_list* | |
847 | read_range_list(unsigned int ranges_shndx, off_t ranges_offset) | |
848 | { | |
5cde809b CC |
849 | if (this->cu_version_ < 5) |
850 | return this->ranges_table_.read_range_list(this->object_, | |
851 | this->symtab_, | |
852 | this->symtab_size_, | |
853 | this->address_size_, | |
854 | ranges_shndx, | |
855 | ranges_offset); | |
856 | else | |
857 | return this->ranges_table_.read_range_list_v5(this->object_, | |
858 | this->symtab_, | |
859 | this->symtab_size_, | |
860 | this->address_size_, | |
861 | ranges_shndx, | |
862 | ranges_offset); | |
c1027032 CC |
863 | } |
864 | ||
865 | // Return the object. | |
866 | Relobj* | |
867 | object() const | |
868 | { return this->object_; } | |
869 | ||
c1027032 CC |
870 | // Checkpoint the relocation tracker. |
871 | uint64_t | |
872 | get_reloc_checkpoint() const | |
873 | { return this->reloc_mapper_->checkpoint(); } | |
874 | ||
875 | // Reset the relocation tracker to the CHECKPOINT. | |
876 | void | |
877 | reset_relocs(uint64_t checkpoint) | |
878 | { this->reloc_mapper_->reset(checkpoint); } | |
879 | ||
880 | private: | |
a68a081d CC |
881 | // Print a warning about a corrupt debug section. |
882 | void | |
883 | warn_corrupt_debug_section() const; | |
884 | ||
c1027032 CC |
885 | // Check that P is within the bounds of the current section. |
886 | bool | |
a68a081d CC |
887 | check_buffer(const unsigned char* p) const |
888 | { | |
889 | if (p > this->buffer_ + this->cu_offset_ + this->cu_length_) | |
890 | { | |
891 | this->warn_corrupt_debug_section(); | |
892 | return false; | |
893 | } | |
894 | return true; | |
895 | } | |
c1027032 CC |
896 | |
897 | // Read the DWARF string table. | |
898 | bool | |
899 | read_string_table(unsigned int string_shndx) | |
900 | { | |
901 | // If we've already read this string table, return immediately. | |
902 | if (this->string_shndx_ > 0 && this->string_shndx_ == string_shndx) | |
903 | return true; | |
904 | if (string_shndx == 0 && this->string_shndx_ > 0) | |
905 | return true; | |
906 | return this->do_read_string_table(string_shndx); | |
907 | } | |
908 | ||
909 | bool | |
910 | do_read_string_table(unsigned int string_shndx); | |
911 | ||
5cde809b CC |
912 | // The unit type (DW_UT_xxx). |
913 | unsigned int unit_type_; | |
c1027032 CC |
914 | // The object containing the .debug_info or .debug_types input section. |
915 | Relobj* object_; | |
916 | // The ELF symbol table. | |
917 | const unsigned char* symtab_; | |
918 | // The size of the ELF symbol table. | |
919 | off_t symtab_size_; | |
920 | // Index of the .debug_info or .debug_types section. | |
921 | unsigned int shndx_; | |
922 | // Index of the relocation section. | |
923 | unsigned int reloc_shndx_; | |
924 | // Type of the relocation section (SHT_REL or SHT_RELA). | |
925 | unsigned int reloc_type_; | |
8787852d CC |
926 | // Index of the .debug_abbrev section (0 if not known). |
927 | unsigned int abbrev_shndx_; | |
c1027032 CC |
928 | // Index of the .debug_str section. |
929 | unsigned int string_shndx_; | |
930 | // The buffer for the debug info. | |
931 | const unsigned char* buffer_; | |
932 | const unsigned char* buffer_end_; | |
933 | // Offset of the current compilation unit. | |
934 | off_t cu_offset_; | |
935 | // Length of the current compilation unit. | |
936 | off_t cu_length_; | |
937 | // Size of a DWARF offset for the current compilation unit. | |
938 | unsigned int offset_size_; | |
939 | // Size of an address for the target architecture. | |
940 | unsigned int address_size_; | |
941 | // Compilation unit version number. | |
942 | unsigned int cu_version_; | |
c1027032 CC |
943 | // Abbreviations table for current compilation unit. |
944 | Dwarf_abbrev_table abbrev_table_; | |
945 | // Ranges table for the current compilation unit. | |
946 | Dwarf_ranges_table ranges_table_; | |
947 | // Relocation mapper for the section. | |
948 | Elf_reloc_mapper* reloc_mapper_; | |
949 | // The buffer for the debug string table. | |
950 | const char* string_buffer_; | |
951 | const char* string_buffer_end_; | |
952 | // True if this object owns the buffer and needs to delete it. | |
953 | bool owns_string_buffer_; | |
954 | // For incremental update links, this will hold the offset of the | |
955 | // input .debug_str section within the output section. Offsets read | |
956 | // from relocated data will be relative to the output section, and need | |
957 | // to be corrected before reading data from the input section. | |
958 | uint64_t string_output_section_offset_; | |
959 | }; | |
960 | ||
79e052ea ILT |
961 | // We can't do better than to keep the offsets in a sorted vector. |
962 | // Here, offset is the key, and file_num/line_num is the value. | |
963 | struct Offset_to_lineno_entry | |
964 | { | |
965 | off_t offset; | |
966 | int header_num; // which file-list to use (i.e. which .o file are we in) | |
71ff8986 ILT |
967 | // A pointer into files_. |
968 | unsigned int file_num : sizeof(int) * CHAR_BIT - 1; | |
969 | // True if this was the last entry for the current offset, meaning | |
970 | // it's the line that actually applies. | |
971 | unsigned int last_line_for_offset : 1; | |
972 | // The line number in the source file. -1 to indicate end-of-function. | |
973 | int line_num; | |
974 | ||
975 | // This sorts by offsets first, and then puts the correct line to | |
976 | // report for a given offset at the beginning of the run of equal | |
977 | // offsets (so that asking for 1 line gives the best answer). This | |
978 | // is not a total ordering. | |
79e052ea | 979 | bool operator<(const Offset_to_lineno_entry& that) const |
71ff8986 ILT |
980 | { |
981 | if (this->offset != that.offset) | |
982 | return this->offset < that.offset; | |
983 | // Note the '>' which makes this sort 'true' first. | |
984 | return this->last_line_for_offset > that.last_line_for_offset; | |
985 | } | |
79e052ea ILT |
986 | }; |
987 | ||
5c2c6c95 ILT |
988 | // This class is used to read the line information from the debugging |
989 | // section of an object file. | |
990 | ||
991 | class Dwarf_line_info | |
992 | { | |
993 | public: | |
a55ce7fe ILT |
994 | Dwarf_line_info() |
995 | { } | |
996 | ||
997 | virtual | |
998 | ~Dwarf_line_info() | |
999 | { } | |
5c2c6c95 ILT |
1000 | |
1001 | // Given a section number and an offset, returns the associated | |
1002 | // file and line-number, as a string: "file:lineno". If unable | |
1003 | // to do the mapping, returns the empty string. You must call | |
71ff8986 ILT |
1004 | // read_line_mappings() before calling this function. If |
1005 | // 'other_lines' is non-NULL, fills that in with other line | |
1006 | // numbers assigned to the same offset. | |
5c2c6c95 | 1007 | std::string |
71ff8986 ILT |
1008 | addr2line(unsigned int shndx, off_t offset, |
1009 | std::vector<std::string>* other_lines) | |
1010 | { return this->do_addr2line(shndx, offset, other_lines); } | |
a55ce7fe | 1011 | |
e4e5049b CS |
1012 | // A helper function for a single addr2line lookup. It also keeps a |
1013 | // cache of the last CACHE_SIZE Dwarf_line_info objects it created; | |
1014 | // set to 0 not to cache at all. The larger CACHE_SIZE is, the more | |
1015 | // chance this routine won't have to re-create a Dwarf_line_info | |
1016 | // object for its addr2line computation; such creations are slow. | |
1017 | // NOTE: Not thread-safe, so only call from one thread at a time. | |
a55ce7fe | 1018 | static std::string |
e4e5049b | 1019 | one_addr2line(Object* object, unsigned int shndx, off_t offset, |
71ff8986 | 1020 | size_t cache_size, std::vector<std::string>* other_lines); |
e4e5049b CS |
1021 | |
1022 | // This reclaims all the memory that one_addr2line may have cached. | |
1023 | // Use this when you know you will not be calling one_addr2line again. | |
1024 | static void | |
1025 | clear_addr2line_cache(); | |
5c2c6c95 ILT |
1026 | |
1027 | private: | |
a55ce7fe | 1028 | virtual std::string |
71ff8986 ILT |
1029 | do_addr2line(unsigned int shndx, off_t offset, |
1030 | std::vector<std::string>* other_lines) = 0; | |
a55ce7fe ILT |
1031 | }; |
1032 | ||
1033 | template<int size, bool big_endian> | |
a18f2bd6 | 1034 | class Sized_dwarf_line_info : public Dwarf_line_info |
a55ce7fe ILT |
1035 | { |
1036 | public: | |
1037 | // Initializes a .debug_line reader for a given object file. | |
9430daf8 ILT |
1038 | // If SHNDX is specified and non-negative, only read the debug |
1039 | // information that pertains to the specified section. | |
75aea3d0 | 1040 | Sized_dwarf_line_info(Object* object, unsigned int read_shndx = -1U); |
a55ce7fe | 1041 | |
5dd8762a CC |
1042 | virtual |
1043 | ~Sized_dwarf_line_info() | |
1044 | { | |
1045 | if (this->buffer_start_ != NULL) | |
1046 | delete[] this->buffer_start_; | |
5cde809b CC |
1047 | if (this->str_buffer_start_ != NULL) |
1048 | delete[] this->str_buffer_start_; | |
5dd8762a CC |
1049 | } |
1050 | ||
a55ce7fe ILT |
1051 | private: |
1052 | std::string | |
71ff8986 ILT |
1053 | do_addr2line(unsigned int shndx, off_t offset, |
1054 | std::vector<std::string>* other_lines); | |
1055 | ||
1056 | // Formats a file and line number to a string like "dirname/filename:lineno". | |
1057 | std::string | |
1058 | format_file_lineno(const Offset_to_lineno_entry& lineno) const; | |
a55ce7fe | 1059 | |
24badc65 | 1060 | // Start processing line info, and populates the offset_map_. |
9430daf8 ILT |
1061 | // If SHNDX is non-negative, only store debug information that |
1062 | // pertains to the specified section. | |
24badc65 | 1063 | void |
c1027032 | 1064 | read_line_mappings(unsigned int shndx); |
24badc65 | 1065 | |
4c50553d ILT |
1066 | // Reads the relocation section associated with .debug_line and |
1067 | // stores relocation information in reloc_map_. | |
1068 | void | |
c1027032 | 1069 | read_relocs(); |
4c50553d | 1070 | |
5cde809b | 1071 | // Reads the DWARF header for this line info. Each takes as input |
5c2c6c95 | 1072 | // a starting buffer position, and returns the ending position. |
5c2c6c95 ILT |
1073 | const unsigned char* |
1074 | read_header_prolog(const unsigned char* lineptr); | |
1075 | ||
1076 | const unsigned char* | |
5cde809b CC |
1077 | read_header_tables_v2(const unsigned char* lineptr); |
1078 | ||
1079 | const unsigned char* | |
1080 | read_header_tables_v5(const unsigned char* lineptr); | |
5c2c6c95 | 1081 | |
5cde809b | 1082 | // Reads the DWARF line information. If shndx is non-negative, |
9430daf8 ILT |
1083 | // discard all line information that doesn't pertain to the given |
1084 | // section. | |
5c2c6c95 | 1085 | const unsigned char* |
5cde809b CC |
1086 | read_lines(const unsigned char* lineptr, const unsigned char* endptr, |
1087 | unsigned int shndx); | |
5c2c6c95 ILT |
1088 | |
1089 | // Process a single line info opcode at START using the state | |
1090 | // machine at LSM. Return true if we should define a line using the | |
1091 | // current state of the line state machine. Place the length of the | |
1092 | // opcode in LEN. | |
1093 | bool | |
e43872e9 | 1094 | process_one_opcode(const unsigned char* start, |
5c2c6c95 ILT |
1095 | struct LineStateMachine* lsm, size_t* len); |
1096 | ||
af674d1d ILT |
1097 | // Some parts of processing differ depending on whether the input |
1098 | // was a .o file or not. | |
1099 | bool input_is_relobj(); | |
1100 | ||
4c50553d ILT |
1101 | // If we saw anything amiss while parsing, we set this to false. |
1102 | // Then addr2line will always fail (rather than return possibly- | |
1103 | // corrupt data). | |
1104 | bool data_valid_; | |
1105 | ||
5c2c6c95 ILT |
1106 | // A DWARF2/3 line info header. This is not the same size as in the |
1107 | // actual file, as the one in the file may have a 32 bit or 64 bit | |
1108 | // lengths. | |
1109 | ||
1110 | struct Dwarf_line_infoHeader | |
1111 | { | |
1112 | off_t total_length; | |
1113 | int version; | |
5cde809b | 1114 | int address_size; |
5c2c6c95 | 1115 | off_t prologue_length; |
c8334458 CC |
1116 | int min_insn_length; // insn stands for instruction |
1117 | int max_ops_per_insn; // Added in DWARF-4. | |
5c2c6c95 ILT |
1118 | bool default_is_stmt; // stmt stands for statement |
1119 | signed char line_base; | |
1120 | int line_range; | |
1121 | unsigned char opcode_base; | |
1122 | std::vector<unsigned char> std_opcode_lengths; | |
1123 | int offset_size; | |
1124 | } header_; | |
1125 | ||
1126 | // buffer is the buffer for our line info, starting at exactly where | |
1127 | // the line info to read is. | |
1128 | const unsigned char* buffer_; | |
24badc65 | 1129 | const unsigned char* buffer_end_; |
5dd8762a CC |
1130 | // If the buffer was allocated temporarily, and therefore must be |
1131 | // deallocated in the dtor, this contains a pointer to the start | |
1132 | // of the buffer. | |
1133 | const unsigned char* buffer_start_; | |
5c2c6c95 | 1134 | |
5cde809b CC |
1135 | // str_buffer is the buffer for the line table strings. |
1136 | const unsigned char* str_buffer_; | |
1137 | const unsigned char* str_buffer_end_; | |
1138 | // If the buffer was allocated temporarily, and therefore must be | |
1139 | // deallocated in the dtor, this contains a pointer to the start | |
1140 | // of the buffer. | |
1141 | const unsigned char* str_buffer_start_; | |
1142 | ||
1143 | // Pointer to the end of the header_length field (aka prologue_length). | |
1144 | const unsigned char* end_of_header_length_; | |
1145 | ||
1146 | // Pointer to the end of the current compilation unit. | |
1147 | const unsigned char* end_of_unit_; | |
1148 | ||
4c50553d | 1149 | // This has relocations that point into buffer. |
c1027032 | 1150 | Sized_elf_reloc_mapper<size, big_endian>* reloc_mapper_; |
4dbfafcc ILT |
1151 | // The type of the reloc section in track_relocs_--SHT_REL or SHT_RELA. |
1152 | unsigned int track_relocs_type_; | |
4c50553d ILT |
1153 | |
1154 | // This is used to figure out what section to apply a relocation to. | |
24badc65 | 1155 | const unsigned char* symtab_buffer_; |
8383303e | 1156 | section_size_type symtab_buffer_size_; |
4c50553d | 1157 | |
af674d1d ILT |
1158 | // Holds the directories and files as we see them. We have an array |
1159 | // of directory-lists, one for each .o file we're reading (usually | |
1160 | // there will just be one, but there may be more if input is a .so). | |
1161 | std::vector<std::vector<std::string> > directories_; | |
5c2c6c95 | 1162 | // The first part is an index into directories_, the second the filename. |
af674d1d ILT |
1163 | std::vector<std::vector< std::pair<int, std::string> > > files_; |
1164 | ||
1165 | // An index into the current directories_ and files_ vectors. | |
1166 | int current_header_index_; | |
5c2c6c95 | 1167 | |
af674d1d ILT |
1168 | // A sorted map from offset of the relocation target to the shndx |
1169 | // and addend for the relocation. | |
c1027032 | 1170 | typedef std::map<off_t, std::pair<unsigned int, off_t> > |
4c50553d ILT |
1171 | Reloc_map; |
1172 | Reloc_map reloc_map_; | |
1173 | ||
5c2c6c95 ILT |
1174 | // We have a vector of offset->lineno entries for every input section. |
1175 | typedef Unordered_map<unsigned int, std::vector<Offset_to_lineno_entry> > | |
1176 | Lineno_map; | |
1177 | ||
1178 | Lineno_map line_number_map_; | |
1179 | }; | |
1180 | ||
1181 | } // End namespace gold. | |
1182 | ||
1183 | #endif // !defined(GOLD_DWARF_READER_H) |