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3ce2c28e ILT |
1 | // inremental.h -- incremental linking support for gold -*- C++ -*- |
2 | ||
09ec0418 | 3 | // Copyright 2009, 2010 Free Software Foundation, Inc. |
3ce2c28e ILT |
4 | // Written by Mikolaj Zalewski <mikolajz@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_INCREMENTAL_H | |
24 | #define GOLD_INCREMENTAL_H | |
25 | ||
072fe7ce | 26 | #include <map> |
3ce2c28e ILT |
27 | #include <vector> |
28 | ||
c549a694 | 29 | #include "elfcpp_file.h" |
3ce2c28e ILT |
30 | #include "stringpool.h" |
31 | #include "workqueue.h" | |
98fa85cb | 32 | #include "fileread.h" |
c549a694 | 33 | #include "output.h" |
3ce2c28e ILT |
34 | |
35 | namespace gold | |
36 | { | |
37 | ||
38 | class Archive; | |
39 | class Input_argument; | |
40 | class Incremental_inputs_checker; | |
09ec0418 CC |
41 | class Incremental_script_entry; |
42 | class Incremental_object_entry; | |
43 | class Incremental_archive_entry; | |
44 | class Incremental_inputs; | |
3ce2c28e | 45 | class Object; |
3ce2c28e | 46 | |
072fe7ce ILT |
47 | // Incremental input type as stored in .gnu_incremental_inputs. |
48 | ||
49 | enum Incremental_input_type | |
50 | { | |
072fe7ce | 51 | INCREMENTAL_INPUT_OBJECT = 1, |
09ec0418 CC |
52 | INCREMENTAL_INPUT_ARCHIVE_MEMBER = 2, |
53 | INCREMENTAL_INPUT_ARCHIVE = 3, | |
54 | INCREMENTAL_INPUT_SHARED_LIBRARY = 4, | |
55 | INCREMENTAL_INPUT_SCRIPT = 5 | |
ca55d848 RÁE |
56 | }; |
57 | ||
c549a694 ILT |
58 | // An object representing the ELF file we edit during an incremental build. |
59 | // Similar to Object or Dynobj, but operates on Output_file and contains | |
60 | // method specific to file edition (TBD). This is the abstract parent class | |
61 | // implemented in Sized_incremental_binary<size, big_endian> for a specific | |
62 | // endianness and size. | |
63 | ||
64 | class Incremental_binary | |
65 | { | |
66 | public: | |
67 | Incremental_binary(Output_file* output, Target* target) | |
68 | : output_(output), target_(target) | |
69 | { } | |
70 | ||
71 | virtual | |
72 | ~Incremental_binary() | |
73 | { } | |
74 | ||
75 | // Functions and types for the elfcpp::Elf_file interface. This | |
76 | // permit us to use Incremental_binary as the File template parameter for | |
77 | // elfcpp::Elf_file. | |
78 | ||
79 | // The View class is returned by view. It must support a single | |
80 | // method, data(). This is trivial, because Output_file::get_output_view | |
81 | // does what we need. | |
82 | class View | |
83 | { | |
84 | public: | |
85 | View(const unsigned char* p) | |
86 | : p_(p) | |
87 | { } | |
88 | ||
89 | const unsigned char* | |
90 | data() const | |
91 | { return this->p_; } | |
92 | ||
93 | private: | |
94 | const unsigned char* p_; | |
95 | }; | |
96 | ||
97 | // Return a View. | |
98 | View | |
99 | view(off_t file_offset, section_size_type data_size) | |
100 | { return View(this->output_->get_input_view(file_offset, data_size)); } | |
101 | ||
102 | // A location in the file. | |
103 | struct Location | |
104 | { | |
105 | off_t file_offset; | |
106 | off_t data_size; | |
107 | ||
108 | Location(off_t fo, section_size_type ds) | |
109 | : file_offset(fo), data_size(ds) | |
110 | { } | |
111 | ||
112 | Location() | |
113 | : file_offset(0), data_size(0) | |
114 | { } | |
115 | }; | |
116 | ||
117 | // Get a View given a Location. | |
09ec0418 CC |
118 | View |
119 | view(Location loc) | |
c549a694 ILT |
120 | { return View(this->view(loc.file_offset, loc.data_size)); } |
121 | ||
122 | // Report an error. | |
123 | void | |
124 | error(const char* format, ...) const ATTRIBUTE_PRINTF_2; | |
125 | ||
09ec0418 CC |
126 | // Find the .gnu_incremental_inputs and related sections. It selects the |
127 | // first section of type SHT_GNU_INCREMENTAL_INPUTS, | |
128 | // SHT_GNU_INCRMENTAL_SYMTAB, and SHT_GNU_INCREMENTAL_RELOCS. | |
129 | // Returns false if the sections are not found. | |
c549a694 | 130 | bool |
09ec0418 CC |
131 | find_incremental_inputs_sections(unsigned int* p_inputs_shndx, |
132 | unsigned int* p_symtab_shndx, | |
133 | unsigned int* p_relocs_shndx, | |
0e70b911 | 134 | unsigned int* p_got_plt_shndx, |
09ec0418 CC |
135 | unsigned int* p_strtab_shndx) |
136 | { | |
137 | return do_find_incremental_inputs_sections(p_inputs_shndx, p_symtab_shndx, | |
0e70b911 CC |
138 | p_relocs_shndx, p_got_plt_shndx, |
139 | p_strtab_shndx); | |
09ec0418 | 140 | } |
c4aa1e2d ILT |
141 | |
142 | // Check the .gnu_incremental_inputs section to see whether an incremental | |
143 | // build is possible. | |
144 | // TODO: on success, should report what files needs to be rebuilt. | |
145 | // INCREMENTAL_INPUTS is used to read the canonical form of the command line | |
146 | // and read the input arguments. TODO: for items that don't need to be | |
147 | // rebuilt, we should also copy the incremental input information. | |
148 | virtual bool | |
149 | check_inputs(Incremental_inputs* incremental_inputs) | |
150 | { return do_check_inputs(incremental_inputs); } | |
c549a694 ILT |
151 | |
152 | protected: | |
153 | // Find incremental inputs section. | |
154 | virtual bool | |
09ec0418 CC |
155 | do_find_incremental_inputs_sections(unsigned int* p_inputs_shndx, |
156 | unsigned int* p_symtab_shndx, | |
157 | unsigned int* p_relocs_shndx, | |
0e70b911 | 158 | unsigned int* p_got_plt_shndx, |
09ec0418 | 159 | unsigned int* p_strtab_shndx) = 0; |
c4aa1e2d ILT |
160 | |
161 | // Check the .gnu_incremental_inputs section to see whether an incremental | |
162 | // build is possible. | |
163 | virtual bool | |
164 | do_check_inputs(Incremental_inputs* incremental_inputs) = 0; | |
c549a694 ILT |
165 | |
166 | private: | |
167 | // Edited output file object. | |
168 | Output_file* output_; | |
169 | // Target of the output file. | |
170 | Target* target_; | |
171 | }; | |
172 | ||
173 | template<int size, bool big_endian> | |
174 | class Sized_incremental_binary : public Incremental_binary | |
175 | { | |
176 | public: | |
177 | Sized_incremental_binary(Output_file* output, | |
178 | const elfcpp::Ehdr<size, big_endian>& ehdr, | |
179 | Target* target) | |
180 | : Incremental_binary(output, target), elf_file_(this, ehdr) | |
181 | { } | |
182 | ||
183 | protected: | |
184 | virtual bool | |
09ec0418 CC |
185 | do_find_incremental_inputs_sections(unsigned int* p_inputs_shndx, |
186 | unsigned int* p_symtab_shndx, | |
187 | unsigned int* p_relocs_shndx, | |
0e70b911 | 188 | unsigned int* p_got_plt_shndx, |
09ec0418 | 189 | unsigned int* p_strtab_shndx); |
c4aa1e2d ILT |
190 | |
191 | virtual bool | |
192 | do_check_inputs(Incremental_inputs* incremental_inputs); | |
c549a694 ILT |
193 | |
194 | private: | |
195 | // Output as an ELF file. | |
196 | elfcpp::Elf_file<size, big_endian, Incremental_binary> elf_file_; | |
197 | }; | |
198 | ||
199 | // Create an Incremental_binary object for FILE. Returns NULL is this is not | |
200 | // possible, e.g. FILE is not an ELF file or has an unsupported target. | |
09ec0418 | 201 | |
c549a694 ILT |
202 | Incremental_binary* |
203 | open_incremental_binary(Output_file* file); | |
204 | ||
44453f85 ILT |
205 | // Code invoked early during an incremental link that checks what files need |
206 | // to be relinked. | |
09ec0418 | 207 | |
44453f85 ILT |
208 | class Incremental_checker |
209 | { | |
210 | public: | |
c4aa1e2d ILT |
211 | // Check if the file named OUTPUT_NAME can be linked incrementally. |
212 | // INCREMENTAL_INPUTS must have the canonical form of the command line | |
213 | // and input arguments filled - at this point of linking other fields are | |
214 | // probably not filled yet. TODO: for inputs that don't need to be | |
215 | // rebuilt, this function should fill the incremental input information. | |
216 | Incremental_checker(const char* output_name, | |
217 | Incremental_inputs* incremental_inputs) | |
218 | : output_name_(output_name), incremental_inputs_(incremental_inputs) | |
44453f85 ILT |
219 | { } |
220 | ||
221 | // Analyzes the output file to check if incremental linking is possible and | |
222 | // what files needs to be relinked. | |
223 | bool | |
224 | can_incrementally_link_output_file(); | |
225 | ||
226 | private: | |
c4aa1e2d | 227 | // Name of the output file to analyze. |
44453f85 | 228 | const char* output_name_; |
c4aa1e2d ILT |
229 | |
230 | // The Incremental_inputs object. At this stage of link, only the command | |
231 | // line and inputs are filled. | |
232 | Incremental_inputs* incremental_inputs_; | |
44453f85 ILT |
233 | }; |
234 | ||
09ec0418 CC |
235 | // Base class for recording each input file. |
236 | ||
237 | class Incremental_input_entry | |
238 | { | |
239 | public: | |
240 | Incremental_input_entry(Stringpool::Key filename_key, Timespec mtime) | |
241 | : filename_key_(filename_key), offset_(0), info_offset_(0), mtime_(mtime) | |
242 | { } | |
243 | ||
244 | // Return the type of input file. | |
245 | Incremental_input_type | |
246 | type() const | |
247 | { return this->do_type(); } | |
248 | ||
249 | // Set the section offset of this input file entry. | |
250 | void | |
251 | set_offset(unsigned int offset) | |
252 | { this->offset_ = offset; } | |
253 | ||
254 | // Set the section offset of the supplemental information for this entry. | |
255 | void | |
256 | set_info_offset(unsigned int info_offset) | |
257 | { this->info_offset_ = info_offset; } | |
258 | ||
259 | // Get the section offset of this input file entry. | |
260 | unsigned int | |
261 | get_offset() const | |
262 | { return this->offset_; } | |
263 | ||
264 | // Get the section offset of the supplemental information for this entry. | |
265 | unsigned int | |
266 | get_info_offset() const | |
267 | { return this->info_offset_; } | |
268 | ||
269 | // Get the stringpool key for the input filename. | |
270 | Stringpool::Key | |
271 | get_filename_key() const | |
272 | { return this->filename_key_; } | |
273 | ||
274 | // Get the modification time of the input file. | |
275 | const Timespec& | |
276 | get_mtime() const | |
277 | { return this->mtime_; } | |
278 | ||
279 | // Return a pointer to the derived Incremental_script_entry object. | |
280 | // Return NULL for input entries that are not script files. | |
281 | Incremental_script_entry* | |
282 | script_entry() | |
283 | { return this->do_script_entry(); } | |
284 | ||
285 | // Return a pointer to the derived Incremental_object_entry object. | |
286 | // Return NULL for input entries that are not object files. | |
287 | Incremental_object_entry* | |
288 | object_entry() | |
289 | { return this->do_object_entry(); } | |
290 | ||
291 | // Return a pointer to the derived Incremental_archive_entry object. | |
292 | // Return NULL for input entries that are not archive files. | |
293 | Incremental_archive_entry* | |
294 | archive_entry() | |
295 | { return this->do_archive_entry(); } | |
296 | ||
297 | protected: | |
298 | // Return the type of input file. | |
299 | virtual Incremental_input_type | |
300 | do_type() const = 0; | |
301 | ||
302 | // Return a pointer to the derived Incremental_script_entry object. | |
303 | // Return NULL for input entries that are not script files. | |
304 | virtual Incremental_script_entry* | |
305 | do_script_entry() | |
306 | { return NULL; } | |
307 | ||
308 | // Return a pointer to the derived Incremental_object_entry object. | |
309 | // Return NULL for input entries that are not object files. | |
310 | virtual Incremental_object_entry* | |
311 | do_object_entry() | |
312 | { return NULL; } | |
313 | ||
314 | // Return a pointer to the derived Incremental_archive_entry object. | |
315 | // Return NULL for input entries that are not archive files. | |
316 | virtual Incremental_archive_entry* | |
317 | do_archive_entry() | |
318 | { return NULL; } | |
319 | ||
320 | private: | |
321 | // Key of the filename string in the section stringtable. | |
322 | Stringpool::Key filename_key_; | |
323 | ||
324 | // Offset of the entry in the output section. | |
325 | unsigned int offset_; | |
326 | ||
327 | // Offset of the extra information in the output section. | |
328 | unsigned int info_offset_; | |
329 | ||
330 | // Last modification time of the file. | |
331 | Timespec mtime_; | |
332 | }; | |
333 | ||
334 | // Class for recording input scripts. | |
335 | ||
336 | class Incremental_script_entry : public Incremental_input_entry | |
337 | { | |
338 | public: | |
339 | Incremental_script_entry(Stringpool::Key filename_key, Script_info* script, | |
340 | Timespec mtime) | |
341 | : Incremental_input_entry(filename_key, mtime), script_(script) | |
342 | { } | |
343 | ||
344 | protected: | |
345 | virtual Incremental_input_type | |
346 | do_type() const | |
347 | { return INCREMENTAL_INPUT_SCRIPT; } | |
348 | ||
349 | // Return a pointer to the derived Incremental_script_entry object. | |
350 | virtual Incremental_script_entry* | |
351 | do_script_entry() | |
352 | { return this; } | |
353 | ||
354 | private: | |
355 | // Information about the script file. | |
356 | Script_info* script_; | |
357 | }; | |
358 | ||
359 | // Class for recording input object files. | |
360 | ||
361 | class Incremental_object_entry : public Incremental_input_entry | |
362 | { | |
363 | public: | |
364 | Incremental_object_entry(Stringpool::Key filename_key, Object* obj, | |
365 | Timespec mtime) | |
366 | : Incremental_input_entry(filename_key, mtime), obj_(obj), | |
367 | is_member_(false), sections_() | |
368 | { | |
369 | if (!obj_->is_dynamic()) | |
370 | this->sections_.reserve(obj->shnum()); | |
371 | } | |
372 | ||
373 | // Get the object. | |
374 | Object* | |
375 | object() const | |
376 | { return this->obj_; } | |
377 | ||
378 | // Record that this object is an archive member. | |
379 | void | |
380 | set_is_member() | |
381 | { this->is_member_ = true; } | |
382 | ||
383 | // Return true if this object is an archive member. | |
384 | bool | |
385 | is_member() const | |
386 | { return this->is_member_; } | |
387 | ||
388 | // Add an input section. | |
389 | void | |
390 | add_input_section(unsigned int shndx, Stringpool::Key name_key, off_t sh_size) | |
391 | { | |
392 | if (shndx >= this->sections_.size()) | |
393 | this->sections_.resize(shndx + 1); | |
394 | this->sections_[shndx].name_key = name_key; | |
395 | this->sections_[shndx].sh_size = sh_size; | |
396 | } | |
397 | ||
398 | // Return the number of input sections in this object. | |
399 | unsigned int | |
400 | get_input_section_count() const | |
401 | { return this->sections_.size(); } | |
402 | ||
403 | // Return the stringpool key of the Nth input section. | |
404 | Stringpool::Key | |
405 | get_input_section_name_key(unsigned int n) const | |
406 | { return this->sections_[n].name_key; } | |
407 | ||
408 | // Return the size of the Nth input section. | |
409 | off_t | |
410 | get_input_section_size(unsigned int n) const | |
411 | { return this->sections_[n].sh_size; } | |
412 | ||
413 | protected: | |
414 | virtual Incremental_input_type | |
415 | do_type() const | |
416 | { | |
417 | return (this->is_member_ | |
418 | ? INCREMENTAL_INPUT_ARCHIVE_MEMBER | |
419 | : (this->obj_->is_dynamic() | |
420 | ? INCREMENTAL_INPUT_SHARED_LIBRARY | |
421 | : INCREMENTAL_INPUT_OBJECT)); | |
422 | } | |
423 | ||
424 | // Return a pointer to the derived Incremental_object_entry object. | |
425 | virtual Incremental_object_entry* | |
426 | do_object_entry() | |
427 | { return this; } | |
428 | ||
429 | private: | |
430 | // The object file itself. | |
431 | Object* obj_; | |
432 | ||
433 | // Whether this object is an archive member. | |
434 | bool is_member_; | |
435 | ||
436 | // Input sections. | |
437 | struct Input_section | |
438 | { | |
439 | Stringpool::Key name_key; | |
440 | off_t sh_size; | |
441 | }; | |
442 | std::vector<Input_section> sections_; | |
443 | }; | |
444 | ||
445 | // Class for recording archive library input files. | |
446 | ||
447 | class Incremental_archive_entry : public Incremental_input_entry | |
448 | { | |
449 | public: | |
450 | Incremental_archive_entry(Stringpool::Key filename_key, Archive*, | |
451 | Timespec mtime) | |
452 | : Incremental_input_entry(filename_key, mtime), members_(), unused_syms_() | |
453 | { } | |
454 | ||
455 | // Add a member object to the archive. | |
456 | void | |
457 | add_object(Incremental_object_entry* obj_entry) | |
458 | { | |
459 | this->members_.push_back(obj_entry); | |
460 | obj_entry->set_is_member(); | |
461 | } | |
462 | ||
463 | // Add an unused global symbol to the archive. | |
464 | void | |
465 | add_unused_global_symbol(Stringpool::Key symbol_key) | |
466 | { this->unused_syms_.push_back(symbol_key); } | |
467 | ||
468 | // Return the number of member objects included in the link. | |
469 | unsigned int | |
470 | get_member_count() | |
471 | { return this->members_.size(); } | |
472 | ||
473 | // Return the Nth member object. | |
474 | Incremental_object_entry* | |
475 | get_member(unsigned int n) | |
476 | { return this->members_[n]; } | |
477 | ||
478 | // Return the number of unused global symbols in this archive. | |
479 | unsigned int | |
480 | get_unused_global_symbol_count() | |
481 | { return this->unused_syms_.size(); } | |
482 | ||
483 | // Return the Nth unused global symbol. | |
484 | Stringpool::Key | |
485 | get_unused_global_symbol(unsigned int n) | |
486 | { return this->unused_syms_[n]; } | |
487 | ||
488 | protected: | |
489 | virtual Incremental_input_type | |
490 | do_type() const | |
491 | { return INCREMENTAL_INPUT_ARCHIVE; } | |
492 | ||
493 | // Return a pointer to the derived Incremental_archive_entry object. | |
494 | virtual Incremental_archive_entry* | |
495 | do_archive_entry() | |
496 | { return this; } | |
497 | ||
498 | private: | |
499 | // Members of the archive that have been included in the link. | |
500 | std::vector<Incremental_object_entry*> members_; | |
501 | ||
502 | // Unused global symbols from this archive. | |
503 | std::vector<Stringpool::Key> unused_syms_; | |
504 | }; | |
505 | ||
3ce2c28e ILT |
506 | // This class contains the information needed during an incremental |
507 | // build about the inputs necessary to build the .gnu_incremental_inputs. | |
09ec0418 | 508 | |
3ce2c28e ILT |
509 | class Incremental_inputs |
510 | { | |
511 | public: | |
09ec0418 CC |
512 | typedef std::vector<Incremental_input_entry*> Input_list; |
513 | ||
3ce2c28e | 514 | Incremental_inputs() |
09ec0418 CC |
515 | : inputs_(), command_line_(), command_line_key_(0), |
516 | strtab_(new Stringpool()), current_object_(NULL), | |
517 | current_object_entry_(NULL), inputs_section_(NULL), | |
518 | symtab_section_(NULL), relocs_section_(NULL), | |
519 | reloc_count_(0) | |
3ce2c28e | 520 | { } |
09ec0418 | 521 | |
3ce2c28e ILT |
522 | ~Incremental_inputs() { delete this->strtab_; } |
523 | ||
524 | // Record the command line. | |
525 | void | |
526 | report_command_line(int argc, const char* const* argv); | |
072fe7ce | 527 | |
09ec0418 CC |
528 | // Record the initial info for archive file ARCHIVE. |
529 | void | |
530 | report_archive_begin(Archive* arch); | |
531 | ||
532 | // Record the final info for archive file ARCHIVE. | |
533 | void | |
534 | report_archive_end(Archive* arch); | |
535 | ||
536 | // Record the info for object file OBJ. If ARCH is not NULL, | |
537 | // attach the object file to the archive. | |
072fe7ce | 538 | void |
09ec0418 | 539 | report_object(Object* obj, Archive* arch); |
072fe7ce | 540 | |
09ec0418 | 541 | // Record an input section belonging to object file OBJ. |
072fe7ce | 542 | void |
09ec0418 CC |
543 | report_input_section(Object* obj, unsigned int shndx, const char* name, |
544 | off_t sh_size); | |
072fe7ce | 545 | |
09ec0418 | 546 | // Record the info for input script SCRIPT. |
072fe7ce | 547 | void |
09ec0418 CC |
548 | report_script(const std::string& filename, Script_info* script, |
549 | Timespec mtime); | |
550 | ||
551 | // Return the running count of incremental relocations. | |
552 | unsigned int | |
553 | get_reloc_count() const | |
554 | { return this->reloc_count_; } | |
072fe7ce | 555 | |
09ec0418 | 556 | // Update the running count of incremental relocations. |
072fe7ce | 557 | void |
09ec0418 CC |
558 | set_reloc_count(unsigned int count) |
559 | { this->reloc_count_ = count; } | |
072fe7ce | 560 | |
3ce2c28e ILT |
561 | // Prepare for layout. Called from Layout::finalize. |
562 | void | |
563 | finalize(); | |
564 | ||
09ec0418 CC |
565 | // Create the .gnu_incremental_inputs and related sections. |
566 | void | |
567 | create_data_sections(Symbol_table* symtab); | |
568 | ||
569 | // Return the .gnu_incremental_inputs section. | |
3ce2c28e | 570 | Output_section_data* |
09ec0418 CC |
571 | inputs_section() const |
572 | { return this->inputs_section_; } | |
573 | ||
574 | // Return the .gnu_incremental_symtab section. | |
575 | Output_data_space* | |
576 | symtab_section() const | |
577 | { return this->symtab_section_; } | |
578 | ||
579 | // Return the .gnu_incremental_relocs section. | |
580 | Output_data_space* | |
581 | relocs_section() const | |
582 | { return this->relocs_section_; } | |
072fe7ce | 583 | |
0e70b911 CC |
584 | // Return the .gnu_incremental_got_plt section. |
585 | Output_data_space* | |
586 | got_plt_section() const | |
587 | { return this->got_plt_section_; } | |
588 | ||
072fe7ce | 589 | // Return the .gnu_incremental_strtab stringpool. |
3ce2c28e | 590 | Stringpool* |
09ec0418 | 591 | get_stringpool() const |
3ce2c28e ILT |
592 | { return this->strtab_; } |
593 | ||
c4aa1e2d ILT |
594 | // Return the canonical form of the command line, as will be stored in |
595 | // .gnu_incremental_strtab. | |
596 | const std::string& | |
09ec0418 | 597 | command_line() const |
c4aa1e2d ILT |
598 | { return this->command_line_; } |
599 | ||
09ec0418 CC |
600 | // Return the stringpool key of the command line. |
601 | Stringpool::Key | |
602 | command_line_key() const | |
603 | { return this->command_line_key_; } | |
604 | ||
605 | // Return the number of input files. | |
606 | int | |
607 | input_file_count() const | |
608 | { return this->inputs_.size(); } | |
609 | ||
610 | // Return the input files. | |
611 | const Input_list& | |
612 | input_files() const | |
c4aa1e2d ILT |
613 | { return this->inputs_; } |
614 | ||
09ec0418 CC |
615 | // Return the sh_entsize value for the .gnu_incremental_relocs section. |
616 | unsigned int | |
617 | relocs_entsize() const; | |
618 | ||
3ce2c28e | 619 | private: |
09ec0418 CC |
620 | // The list of input files. |
621 | Input_list inputs_; | |
072fe7ce | 622 | |
09ec0418 CC |
623 | // Canonical form of the command line, as will be stored in |
624 | // .gnu_incremental_strtab. | |
625 | std::string command_line_; | |
072fe7ce | 626 | |
09ec0418 CC |
627 | // The key of the command line string in the string pool. |
628 | Stringpool::Key command_line_key_; | |
629 | ||
630 | // The .gnu_incremental_strtab string pool associated with the | |
631 | // .gnu_incremental_inputs. | |
632 | Stringpool* strtab_; | |
633 | ||
634 | // Keep track of the object currently being processed. | |
635 | Object* current_object_; | |
636 | Incremental_object_entry* current_object_entry_; | |
637 | ||
638 | // The .gnu_incremental_inputs section. | |
639 | Output_section_data* inputs_section_; | |
072fe7ce | 640 | |
09ec0418 CC |
641 | // The .gnu_incremental_symtab section. |
642 | Output_data_space* symtab_section_; | |
643 | ||
644 | // The .gnu_incremental_relocs section. | |
645 | Output_data_space* relocs_section_; | |
646 | ||
0e70b911 CC |
647 | // The .gnu_incremental_got_plt section. |
648 | Output_data_space* got_plt_section_; | |
649 | ||
09ec0418 CC |
650 | // Total count of incremental relocations. Updated during Scan_relocs |
651 | // phase at the completion of each object file. | |
652 | unsigned int reloc_count_; | |
653 | }; | |
654 | ||
655 | // Reader class for .gnu_incremental_inputs section. | |
656 | ||
657 | template<int size, bool big_endian> | |
658 | class Incremental_inputs_reader | |
659 | { | |
660 | private: | |
661 | typedef elfcpp::Swap<size, big_endian> Swap; | |
662 | typedef elfcpp::Swap<16, big_endian> Swap16; | |
663 | typedef elfcpp::Swap<32, big_endian> Swap32; | |
664 | typedef elfcpp::Swap<64, big_endian> Swap64; | |
665 | ||
666 | public: | |
667 | Incremental_inputs_reader(const unsigned char* p, elfcpp::Elf_strtab& strtab) | |
668 | : p_(p), strtab_(strtab) | |
669 | { this->input_file_count_ = Swap32::readval(this->p_ + 4); } | |
670 | ||
671 | // Return the version number. | |
672 | unsigned int | |
673 | version() const | |
674 | { return Swap32::readval(this->p_); } | |
675 | ||
676 | // Return the count of input file entries. | |
677 | unsigned int | |
678 | input_file_count() const | |
679 | { return this->input_file_count_; } | |
680 | ||
681 | // Return the command line. | |
682 | const char* | |
683 | command_line() const | |
072fe7ce | 684 | { |
09ec0418 CC |
685 | unsigned int offset = Swap32::readval(this->p_ + 8); |
686 | return this->get_string(offset); | |
687 | } | |
072fe7ce | 688 | |
09ec0418 CC |
689 | // Reader class for an input file entry and its supplemental info. |
690 | class Incremental_input_entry_reader | |
691 | { | |
692 | public: | |
693 | Incremental_input_entry_reader(const Incremental_inputs_reader* inputs, | |
694 | unsigned int offset) | |
695 | : inputs_(inputs), offset_(offset) | |
696 | { | |
697 | this->info_offset_ = Swap32::readval(inputs->p_ + offset + 4); | |
698 | int type = Swap16::readval(this->inputs_->p_ + offset + 20); | |
699 | this->type_ = static_cast<Incremental_input_type>(type); | |
700 | } | |
701 | ||
702 | // Return the filename. | |
703 | const char* | |
704 | filename() const | |
705 | { | |
706 | unsigned int offset = Swap32::readval(this->inputs_->p_ + this->offset_); | |
707 | return this->inputs_->get_string(offset); | |
708 | } | |
072fe7ce | 709 | |
09ec0418 CC |
710 | // Return the timestamp. |
711 | Timespec | |
712 | get_mtime() const | |
713 | { | |
714 | Timespec t; | |
715 | const unsigned char* p = this->inputs_->p_ + this->offset_ + 8; | |
716 | t.seconds = Swap64::readval(p); | |
717 | t.nanoseconds = Swap32::readval(p+8); | |
718 | return t; | |
719 | } | |
720 | ||
721 | // Return the type of input file. | |
722 | Incremental_input_type | |
723 | type() const | |
724 | { return this->type_; } | |
725 | ||
726 | // Return the input section count -- for objects only. | |
727 | unsigned int | |
728 | get_input_section_count() const | |
98fa85cb | 729 | { |
09ec0418 CC |
730 | gold_assert(this->type_ == INCREMENTAL_INPUT_OBJECT |
731 | || this->type_ == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
732 | return Swap32::readval(this->inputs_->p_ + this->info_offset_); | |
733 | } | |
734 | ||
735 | // Return the offset of the supplemental info for symbol SYMNDX -- | |
736 | // for objects only. | |
737 | unsigned int | |
738 | get_symbol_offset(unsigned int symndx) const | |
739 | { | |
740 | gold_assert(this->type_ == INCREMENTAL_INPUT_OBJECT | |
741 | || this->type_ == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
742 | ||
743 | unsigned int section_count = this->get_input_section_count(); | |
744 | return (this->info_offset_ + 8 | |
745 | + section_count * input_section_entry_size | |
746 | + symndx * 16); | |
747 | } | |
748 | ||
749 | // Return the global symbol count -- for objects & shared libraries only. | |
750 | unsigned int | |
751 | get_global_symbol_count() const | |
752 | { | |
753 | switch (this->type_) | |
754 | { | |
755 | case INCREMENTAL_INPUT_OBJECT: | |
756 | case INCREMENTAL_INPUT_ARCHIVE_MEMBER: | |
757 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 4); | |
758 | case INCREMENTAL_INPUT_SHARED_LIBRARY: | |
759 | return Swap32::readval(this->inputs_->p_ + this->info_offset_); | |
760 | default: | |
761 | gold_unreachable(); | |
762 | } | |
763 | } | |
764 | ||
765 | // Return the member count -- for archives only. | |
766 | unsigned int | |
767 | get_member_count() const | |
768 | { | |
769 | gold_assert(this->type_ == INCREMENTAL_INPUT_ARCHIVE); | |
770 | return Swap32::readval(this->inputs_->p_ + this->info_offset_); | |
771 | } | |
44453f85 | 772 | |
09ec0418 CC |
773 | // Return the unused symbol count -- for archives only. |
774 | unsigned int | |
775 | get_unused_symbol_count() const | |
776 | { | |
777 | gold_assert(this->type_ == INCREMENTAL_INPUT_ARCHIVE); | |
778 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 4); | |
779 | } | |
44453f85 | 780 | |
09ec0418 CC |
781 | // Return the input file offset for archive member N -- for archives only. |
782 | unsigned int | |
783 | get_member_offset(unsigned int n) const | |
784 | { | |
785 | gold_assert(this->type_ == INCREMENTAL_INPUT_ARCHIVE); | |
786 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ | |
787 | + 8 + n * 4); | |
788 | } | |
789 | ||
790 | // Return the Nth unused global symbol -- for archives only. | |
791 | const char* | |
792 | get_unused_symbol(unsigned int n) const | |
793 | { | |
794 | gold_assert(this->type_ == INCREMENTAL_INPUT_ARCHIVE); | |
795 | unsigned int member_count = this->get_member_count(); | |
796 | unsigned int offset = Swap32::readval(this->inputs_->p_ | |
797 | + this->info_offset_ + 8 | |
798 | + member_count * 4 | |
799 | + n * 4); | |
800 | return this->inputs_->get_string(offset); | |
801 | } | |
802 | ||
803 | // Information about an input section. | |
804 | struct Input_section_info | |
805 | { | |
806 | const char* name; | |
807 | unsigned int output_shndx; | |
808 | off_t sh_offset; | |
809 | off_t sh_size; | |
98fa85cb | 810 | }; |
072fe7ce | 811 | |
09ec0418 CC |
812 | // Return info about the Nth input section -- for objects only. |
813 | Input_section_info | |
814 | get_input_section(unsigned int n) const | |
815 | { | |
816 | Input_section_info info; | |
817 | const unsigned char* p = (this->inputs_->p_ | |
818 | + this->info_offset_ + 8 | |
819 | + n * input_section_entry_size); | |
820 | unsigned int name_offset = Swap32::readval(p); | |
821 | info.name = this->inputs_->get_string(name_offset); | |
822 | info.output_shndx = Swap32::readval(p + 4); | |
823 | info.sh_offset = Swap::readval(p + 8); | |
824 | info.sh_size = Swap::readval(p + 8 + size / 8); | |
825 | return info; | |
826 | } | |
827 | ||
828 | // Information about a global symbol. | |
829 | struct Global_symbol_info | |
830 | { | |
831 | unsigned int output_symndx; | |
832 | unsigned int next_offset; | |
833 | unsigned int reloc_count; | |
834 | unsigned int reloc_offset; | |
835 | }; | |
072fe7ce | 836 | |
09ec0418 CC |
837 | // Return info about the Nth global symbol -- for objects only. |
838 | Global_symbol_info | |
839 | get_global_symbol_info(unsigned int n) const | |
840 | { | |
841 | Global_symbol_info info; | |
842 | unsigned int section_count = this->get_input_section_count(); | |
843 | const unsigned char* p = (this->inputs_->p_ | |
844 | + this->info_offset_ + 8 | |
845 | + section_count * input_section_entry_size | |
846 | + n * 16); | |
847 | info.output_symndx = Swap32::readval(p); | |
848 | info.next_offset = Swap32::readval(p + 4); | |
849 | info.reloc_count = Swap::readval(p + 8); | |
850 | info.reloc_offset = Swap::readval(p + 12); | |
851 | return info; | |
852 | } | |
44453f85 | 853 | |
09ec0418 CC |
854 | private: |
855 | // Size of an input section entry. | |
856 | static const unsigned int input_section_entry_size = 8 + 2 * size / 8; | |
857 | // The reader instance for the containing section. | |
858 | const Incremental_inputs_reader* inputs_; | |
859 | // The type of input file. | |
860 | Incremental_input_type type_; | |
861 | // Section offset to the input file entry. | |
862 | unsigned int offset_; | |
863 | // Section offset to the supplemental info for the input file. | |
864 | unsigned int info_offset_; | |
072fe7ce ILT |
865 | }; |
866 | ||
09ec0418 CC |
867 | // Return a reader for the Nth input file entry. |
868 | Incremental_input_entry_reader | |
869 | input_file(unsigned int n) const | |
870 | { | |
871 | gold_assert(n < this->input_file_count_); | |
872 | Incremental_input_entry_reader input(this, 16 + n * 24); | |
873 | return input; | |
874 | } | |
875 | ||
876 | private: | |
877 | // Lookup a string in the ELF string table. | |
878 | const char* get_string(unsigned int offset) const | |
879 | { | |
880 | const char* s; | |
881 | if (this->strtab_.get_c_string(offset, &s)) | |
882 | return s; | |
883 | return NULL; | |
884 | } | |
885 | ||
886 | // Base address of the .gnu_incremental_inputs section. | |
887 | const unsigned char* p_; | |
888 | // The associated ELF string table. | |
889 | elfcpp::Elf_strtab strtab_; | |
890 | // The number of input file entries in this section. | |
891 | unsigned int input_file_count_; | |
892 | }; | |
893 | ||
894 | // Reader class for the .gnu_incremental_symtab section. | |
072fe7ce | 895 | |
09ec0418 CC |
896 | template<bool big_endian> |
897 | class Incremental_symtab_reader | |
898 | { | |
899 | public: | |
900 | Incremental_symtab_reader(const unsigned char* p) : p_(p) | |
901 | { } | |
44453f85 | 902 | |
09ec0418 | 903 | // Return the list head for symbol table entry N. |
0e70b911 | 904 | unsigned int get_list_head(unsigned int n) const |
09ec0418 | 905 | { return elfcpp::Swap<32, big_endian>::readval(this->p_ + 4 * n); } |
072fe7ce | 906 | |
09ec0418 CC |
907 | private: |
908 | // Base address of the .gnu_incremental_relocs section. | |
909 | const unsigned char* p_; | |
910 | }; | |
3ce2c28e | 911 | |
09ec0418 | 912 | // Reader class for the .gnu_incremental_relocs section. |
c4aa1e2d | 913 | |
09ec0418 CC |
914 | template<int size, bool big_endian> |
915 | class Incremental_relocs_reader | |
916 | { | |
917 | private: | |
918 | // Size of each field. | |
919 | static const unsigned int field_size = size / 8; | |
c4aa1e2d | 920 | |
09ec0418 CC |
921 | public: |
922 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
923 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Addend; | |
924 | ||
925 | // Size of each entry. | |
926 | static const unsigned int reloc_size = 8 + 2 * field_size; | |
927 | ||
928 | Incremental_relocs_reader(const unsigned char* p) : p_(p) | |
929 | { } | |
930 | ||
931 | // Return the relocation type for relocation entry at offset OFF. | |
932 | unsigned int | |
0e70b911 | 933 | get_r_type(unsigned int off) const |
09ec0418 CC |
934 | { |
935 | return elfcpp::Swap<32, big_endian>::readval(this->p_ + off); | |
936 | } | |
937 | ||
938 | // Return the output section index for relocation entry at offset OFF. | |
939 | unsigned int | |
0e70b911 | 940 | get_r_shndx(unsigned int off) const |
09ec0418 CC |
941 | { |
942 | return elfcpp::Swap<32, big_endian>::readval(this->p_ + off + 4); | |
943 | } | |
944 | ||
945 | // Return the output section offset for relocation entry at offset OFF. | |
946 | Address | |
0e70b911 | 947 | get_r_offset(unsigned int off) const |
09ec0418 CC |
948 | { |
949 | return elfcpp::Swap<size, big_endian>::readval(this->p_ + off + 8); | |
950 | } | |
951 | ||
952 | // Return the addend for relocation entry at offset OFF. | |
953 | Addend | |
0e70b911 | 954 | get_r_addend(unsigned int off) const |
09ec0418 CC |
955 | { |
956 | return elfcpp::Swap<size, big_endian>::readval(this->p_ + off + 8 | |
957 | + this->field_size); | |
958 | } | |
959 | ||
960 | private: | |
961 | // Base address of the .gnu_incremental_relocs section. | |
962 | const unsigned char* p_; | |
3ce2c28e ILT |
963 | }; |
964 | ||
0e70b911 CC |
965 | // Reader class for the .gnu_incremental_got_plt section. |
966 | ||
967 | template<bool big_endian> | |
968 | class Incremental_got_plt_reader | |
969 | { | |
970 | public: | |
971 | Incremental_got_plt_reader(const unsigned char* p) : p_(p) | |
972 | { | |
973 | this->got_count_ = elfcpp::Swap<32, big_endian>::readval(p); | |
974 | this->got_desc_p_ = p + 8 + ((this->got_count_ + 3) & ~3); | |
975 | this->plt_desc_p_ = this->got_desc_p_ + this->got_count_ * 4; | |
976 | } | |
977 | ||
978 | // Return the GOT entry count. | |
979 | unsigned int | |
980 | get_got_entry_count() const | |
981 | { | |
982 | return this->got_count_; | |
983 | } | |
984 | ||
985 | // Return the PLT entry count. | |
986 | unsigned int | |
987 | get_plt_entry_count() const | |
988 | { | |
989 | return elfcpp::Swap<32, big_endian>::readval(this->p_ + 4); | |
990 | } | |
991 | ||
992 | // Return the GOT type for GOT entry N. | |
993 | unsigned int | |
994 | get_got_type(unsigned int n) | |
995 | { | |
996 | return this->p_[8 + n]; | |
997 | } | |
998 | ||
999 | // Return the GOT descriptor for GOT entry N. | |
1000 | unsigned int | |
1001 | get_got_desc(unsigned int n) | |
1002 | { | |
1003 | return elfcpp::Swap<32, big_endian>::readval(this->got_desc_p_ + n * 4); | |
1004 | } | |
1005 | ||
1006 | // Return the PLT descriptor for PLT entry N. | |
1007 | unsigned int | |
1008 | get_plt_desc(unsigned int n) | |
1009 | { | |
1010 | return elfcpp::Swap<32, big_endian>::readval(this->plt_desc_p_ + n * 4); | |
1011 | } | |
1012 | ||
1013 | private: | |
1014 | // Base address of the .gnu_incremental_got_plt section. | |
1015 | const unsigned char* p_; | |
1016 | // GOT entry count. | |
1017 | unsigned int got_count_; | |
1018 | // Base address of the GOT descriptor array. | |
1019 | const unsigned char* got_desc_p_; | |
1020 | // Base address of the PLT descriptor array. | |
1021 | const unsigned char* plt_desc_p_; | |
1022 | }; | |
1023 | ||
3ce2c28e ILT |
1024 | } // End namespace gold. |
1025 | ||
1026 | #endif // !defined(GOLD_INCREMENTAL_H) |