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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" |
cdc29364 | 34 | #include "archive.h" |
3ce2c28e ILT |
35 | |
36 | namespace gold | |
37 | { | |
38 | ||
3ce2c28e ILT |
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; | |
b961d0d7 | 45 | class Incremental_binary; |
cdc29364 | 46 | class Incremental_library; |
3ce2c28e | 47 | class Object; |
cdc29364 | 48 | class Script_info; |
3ce2c28e | 49 | |
072fe7ce ILT |
50 | // Incremental input type as stored in .gnu_incremental_inputs. |
51 | ||
52 | enum Incremental_input_type | |
53 | { | |
072fe7ce | 54 | INCREMENTAL_INPUT_OBJECT = 1, |
09ec0418 CC |
55 | INCREMENTAL_INPUT_ARCHIVE_MEMBER = 2, |
56 | INCREMENTAL_INPUT_ARCHIVE = 3, | |
57 | INCREMENTAL_INPUT_SHARED_LIBRARY = 4, | |
58 | INCREMENTAL_INPUT_SCRIPT = 5 | |
ca55d848 RÁE |
59 | }; |
60 | ||
cdc29364 CC |
61 | // Incremental input file flags. |
62 | // The input file type is stored in the lower eight bits. | |
63 | ||
64 | enum Incremental_input_flags | |
65 | { | |
66 | INCREMENTAL_INPUT_IN_SYSTEM_DIR = 0x0800 | |
67 | }; | |
68 | ||
c549a694 ILT |
69 | // Create an Incremental_binary object for FILE. Returns NULL is this is not |
70 | // possible, e.g. FILE is not an ELF file or has an unsupported target. | |
09ec0418 | 71 | |
c549a694 ILT |
72 | Incremental_binary* |
73 | open_incremental_binary(Output_file* file); | |
74 | ||
09ec0418 CC |
75 | // Base class for recording each input file. |
76 | ||
77 | class Incremental_input_entry | |
78 | { | |
79 | public: | |
cdc29364 CC |
80 | Incremental_input_entry(Stringpool::Key filename_key, unsigned int arg_serial, |
81 | Timespec mtime) | |
4829d394 | 82 | : filename_key_(filename_key), file_index_(0), offset_(0), info_offset_(0), |
cdc29364 | 83 | arg_serial_(arg_serial), mtime_(mtime), is_in_system_directory_(false) |
09ec0418 CC |
84 | { } |
85 | ||
b56648ad ILT |
86 | virtual |
87 | ~Incremental_input_entry() | |
88 | { } | |
89 | ||
09ec0418 CC |
90 | // Return the type of input file. |
91 | Incremental_input_type | |
92 | type() const | |
93 | { return this->do_type(); } | |
94 | ||
4829d394 | 95 | // Set the index and section offset of this input file entry. |
09ec0418 | 96 | void |
4829d394 CC |
97 | set_offset(unsigned int file_index, unsigned int offset) |
98 | { | |
99 | this->file_index_ = file_index; | |
100 | this->offset_ = offset; | |
101 | } | |
09ec0418 CC |
102 | |
103 | // Set the section offset of the supplemental information for this entry. | |
104 | void | |
105 | set_info_offset(unsigned int info_offset) | |
106 | { this->info_offset_ = info_offset; } | |
107 | ||
4829d394 CC |
108 | // Get the index of this input file entry. |
109 | unsigned int | |
110 | get_file_index() const | |
111 | { return this->file_index_; } | |
112 | ||
09ec0418 CC |
113 | // Get the section offset of this input file entry. |
114 | unsigned int | |
115 | get_offset() const | |
116 | { return this->offset_; } | |
117 | ||
118 | // Get the section offset of the supplemental information for this entry. | |
119 | unsigned int | |
120 | get_info_offset() const | |
121 | { return this->info_offset_; } | |
122 | ||
123 | // Get the stringpool key for the input filename. | |
124 | Stringpool::Key | |
125 | get_filename_key() const | |
126 | { return this->filename_key_; } | |
127 | ||
cdc29364 CC |
128 | // Get the serial number of the input file. |
129 | unsigned int | |
130 | arg_serial() const | |
131 | { return this->arg_serial_; } | |
132 | ||
09ec0418 CC |
133 | // Get the modification time of the input file. |
134 | const Timespec& | |
135 | get_mtime() const | |
136 | { return this->mtime_; } | |
137 | ||
cdc29364 CC |
138 | // Record that the file was found in a system directory. |
139 | void | |
140 | set_is_in_system_directory() | |
141 | { this->is_in_system_directory_ = true; } | |
142 | ||
143 | // Return TRUE if the file was found in a system directory. | |
144 | bool | |
145 | is_in_system_directory() const | |
146 | { return this->is_in_system_directory_; } | |
147 | ||
09ec0418 CC |
148 | // Return a pointer to the derived Incremental_script_entry object. |
149 | // Return NULL for input entries that are not script files. | |
150 | Incremental_script_entry* | |
151 | script_entry() | |
152 | { return this->do_script_entry(); } | |
153 | ||
154 | // Return a pointer to the derived Incremental_object_entry object. | |
155 | // Return NULL for input entries that are not object files. | |
156 | Incremental_object_entry* | |
157 | object_entry() | |
158 | { return this->do_object_entry(); } | |
159 | ||
160 | // Return a pointer to the derived Incremental_archive_entry object. | |
161 | // Return NULL for input entries that are not archive files. | |
162 | Incremental_archive_entry* | |
163 | archive_entry() | |
164 | { return this->do_archive_entry(); } | |
165 | ||
166 | protected: | |
167 | // Return the type of input file. | |
168 | virtual Incremental_input_type | |
169 | do_type() const = 0; | |
170 | ||
171 | // Return a pointer to the derived Incremental_script_entry object. | |
172 | // Return NULL for input entries that are not script files. | |
173 | virtual Incremental_script_entry* | |
174 | do_script_entry() | |
175 | { return NULL; } | |
176 | ||
177 | // Return a pointer to the derived Incremental_object_entry object. | |
178 | // Return NULL for input entries that are not object files. | |
179 | virtual Incremental_object_entry* | |
180 | do_object_entry() | |
181 | { return NULL; } | |
182 | ||
183 | // Return a pointer to the derived Incremental_archive_entry object. | |
184 | // Return NULL for input entries that are not archive files. | |
185 | virtual Incremental_archive_entry* | |
186 | do_archive_entry() | |
187 | { return NULL; } | |
188 | ||
189 | private: | |
190 | // Key of the filename string in the section stringtable. | |
191 | Stringpool::Key filename_key_; | |
192 | ||
4829d394 CC |
193 | // Index of the entry in the output section. |
194 | unsigned int file_index_; | |
195 | ||
09ec0418 CC |
196 | // Offset of the entry in the output section. |
197 | unsigned int offset_; | |
198 | ||
199 | // Offset of the extra information in the output section. | |
200 | unsigned int info_offset_; | |
201 | ||
cdc29364 CC |
202 | // Serial number of the file in the argument list. |
203 | unsigned int arg_serial_; | |
204 | ||
09ec0418 CC |
205 | // Last modification time of the file. |
206 | Timespec mtime_; | |
cdc29364 CC |
207 | |
208 | // TRUE if the file was found in a system directory. | |
209 | bool is_in_system_directory_; | |
210 | }; | |
211 | ||
212 | // Information about a script input that will persist during the whole linker | |
213 | // run. Needed only during an incremental build to retrieve the input files | |
214 | // added by this script. | |
215 | ||
216 | class Script_info | |
217 | { | |
218 | public: | |
219 | Script_info(const std::string& filename) | |
220 | : filename_(filename), incremental_script_entry_(NULL) | |
221 | { } | |
222 | ||
223 | // Store a pointer to the incremental information for this script. | |
224 | void | |
225 | set_incremental_info(Incremental_script_entry* entry) | |
226 | { this->incremental_script_entry_ = entry; } | |
227 | ||
228 | // Return the filename. | |
229 | const std::string& | |
230 | filename() const | |
231 | { return this->filename_; } | |
232 | ||
233 | // Return the pointer to the incremental information for this script. | |
234 | Incremental_script_entry* | |
235 | incremental_info() const | |
236 | { return this->incremental_script_entry_; } | |
237 | ||
238 | private: | |
239 | const std::string filename_; | |
240 | Incremental_script_entry* incremental_script_entry_; | |
09ec0418 CC |
241 | }; |
242 | ||
243 | // Class for recording input scripts. | |
244 | ||
245 | class Incremental_script_entry : public Incremental_input_entry | |
246 | { | |
247 | public: | |
cdc29364 CC |
248 | Incremental_script_entry(Stringpool::Key filename_key, |
249 | unsigned int arg_serial, Script_info* script, | |
09ec0418 | 250 | Timespec mtime) |
cdc29364 CC |
251 | : Incremental_input_entry(filename_key, arg_serial, mtime), |
252 | script_(script), objects_() | |
09ec0418 CC |
253 | { } |
254 | ||
c7975edd CC |
255 | // Add a member object to the archive. |
256 | void | |
257 | add_object(Incremental_input_entry* obj_entry) | |
258 | { | |
259 | this->objects_.push_back(obj_entry); | |
260 | } | |
261 | ||
262 | // Return the number of objects included by this script. | |
263 | unsigned int | |
264 | get_object_count() | |
265 | { return this->objects_.size(); } | |
266 | ||
267 | // Return the Nth object. | |
268 | Incremental_input_entry* | |
269 | get_object(unsigned int n) | |
270 | { | |
271 | gold_assert(n < this->objects_.size()); | |
272 | return this->objects_[n]; | |
273 | } | |
274 | ||
09ec0418 CC |
275 | protected: |
276 | virtual Incremental_input_type | |
277 | do_type() const | |
278 | { return INCREMENTAL_INPUT_SCRIPT; } | |
279 | ||
280 | // Return a pointer to the derived Incremental_script_entry object. | |
281 | virtual Incremental_script_entry* | |
282 | do_script_entry() | |
283 | { return this; } | |
284 | ||
285 | private: | |
286 | // Information about the script file. | |
287 | Script_info* script_; | |
c7975edd CC |
288 | // Objects that have been included by this script. |
289 | std::vector<Incremental_input_entry*> objects_; | |
09ec0418 CC |
290 | }; |
291 | ||
292 | // Class for recording input object files. | |
293 | ||
294 | class Incremental_object_entry : public Incremental_input_entry | |
295 | { | |
296 | public: | |
297 | Incremental_object_entry(Stringpool::Key filename_key, Object* obj, | |
cdc29364 CC |
298 | unsigned int arg_serial, Timespec mtime) |
299 | : Incremental_input_entry(filename_key, arg_serial, mtime), obj_(obj), | |
09ec0418 CC |
300 | is_member_(false), sections_() |
301 | { | |
302 | if (!obj_->is_dynamic()) | |
303 | this->sections_.reserve(obj->shnum()); | |
304 | } | |
305 | ||
306 | // Get the object. | |
307 | Object* | |
308 | object() const | |
309 | { return this->obj_; } | |
310 | ||
311 | // Record that this object is an archive member. | |
312 | void | |
313 | set_is_member() | |
314 | { this->is_member_ = true; } | |
315 | ||
316 | // Return true if this object is an archive member. | |
317 | bool | |
318 | is_member() const | |
319 | { return this->is_member_; } | |
320 | ||
321 | // Add an input section. | |
322 | void | |
323 | add_input_section(unsigned int shndx, Stringpool::Key name_key, off_t sh_size) | |
cdc29364 | 324 | { this->sections_.push_back(Input_section(shndx, name_key, sh_size)); } |
09ec0418 CC |
325 | |
326 | // Return the number of input sections in this object. | |
327 | unsigned int | |
328 | get_input_section_count() const | |
329 | { return this->sections_.size(); } | |
330 | ||
cdc29364 CC |
331 | // Return the input section index for the Nth input section. |
332 | Stringpool::Key | |
333 | get_input_section_index(unsigned int n) const | |
334 | { return this->sections_[n].shndx_; } | |
335 | ||
09ec0418 CC |
336 | // Return the stringpool key of the Nth input section. |
337 | Stringpool::Key | |
338 | get_input_section_name_key(unsigned int n) const | |
cdc29364 | 339 | { return this->sections_[n].name_key_; } |
09ec0418 CC |
340 | |
341 | // Return the size of the Nth input section. | |
342 | off_t | |
343 | get_input_section_size(unsigned int n) const | |
cdc29364 | 344 | { return this->sections_[n].sh_size_; } |
09ec0418 CC |
345 | |
346 | protected: | |
347 | virtual Incremental_input_type | |
348 | do_type() const | |
349 | { | |
350 | return (this->is_member_ | |
351 | ? INCREMENTAL_INPUT_ARCHIVE_MEMBER | |
352 | : (this->obj_->is_dynamic() | |
353 | ? INCREMENTAL_INPUT_SHARED_LIBRARY | |
354 | : INCREMENTAL_INPUT_OBJECT)); | |
355 | } | |
356 | ||
357 | // Return a pointer to the derived Incremental_object_entry object. | |
358 | virtual Incremental_object_entry* | |
359 | do_object_entry() | |
360 | { return this; } | |
361 | ||
362 | private: | |
363 | // The object file itself. | |
364 | Object* obj_; | |
365 | ||
366 | // Whether this object is an archive member. | |
367 | bool is_member_; | |
368 | ||
369 | // Input sections. | |
370 | struct Input_section | |
371 | { | |
cdc29364 CC |
372 | Input_section(unsigned int shndx, Stringpool::Key name_key, off_t sh_size) |
373 | : shndx_(shndx), name_key_(name_key), sh_size_(sh_size) | |
374 | { } | |
375 | unsigned int shndx_; | |
376 | Stringpool::Key name_key_; | |
377 | off_t sh_size_; | |
09ec0418 CC |
378 | }; |
379 | std::vector<Input_section> sections_; | |
380 | }; | |
381 | ||
382 | // Class for recording archive library input files. | |
383 | ||
384 | class Incremental_archive_entry : public Incremental_input_entry | |
385 | { | |
386 | public: | |
cdc29364 CC |
387 | Incremental_archive_entry(Stringpool::Key filename_key, |
388 | unsigned int arg_serial, Timespec mtime) | |
389 | : Incremental_input_entry(filename_key, arg_serial, mtime), members_(), | |
390 | unused_syms_() | |
09ec0418 CC |
391 | { } |
392 | ||
393 | // Add a member object to the archive. | |
394 | void | |
395 | add_object(Incremental_object_entry* obj_entry) | |
396 | { | |
397 | this->members_.push_back(obj_entry); | |
398 | obj_entry->set_is_member(); | |
399 | } | |
400 | ||
401 | // Add an unused global symbol to the archive. | |
402 | void | |
403 | add_unused_global_symbol(Stringpool::Key symbol_key) | |
404 | { this->unused_syms_.push_back(symbol_key); } | |
405 | ||
406 | // Return the number of member objects included in the link. | |
407 | unsigned int | |
408 | get_member_count() | |
409 | { return this->members_.size(); } | |
410 | ||
411 | // Return the Nth member object. | |
412 | Incremental_object_entry* | |
413 | get_member(unsigned int n) | |
414 | { return this->members_[n]; } | |
415 | ||
416 | // Return the number of unused global symbols in this archive. | |
417 | unsigned int | |
418 | get_unused_global_symbol_count() | |
419 | { return this->unused_syms_.size(); } | |
420 | ||
421 | // Return the Nth unused global symbol. | |
422 | Stringpool::Key | |
423 | get_unused_global_symbol(unsigned int n) | |
424 | { return this->unused_syms_[n]; } | |
425 | ||
426 | protected: | |
427 | virtual Incremental_input_type | |
428 | do_type() const | |
429 | { return INCREMENTAL_INPUT_ARCHIVE; } | |
430 | ||
431 | // Return a pointer to the derived Incremental_archive_entry object. | |
432 | virtual Incremental_archive_entry* | |
433 | do_archive_entry() | |
434 | { return this; } | |
435 | ||
436 | private: | |
437 | // Members of the archive that have been included in the link. | |
438 | std::vector<Incremental_object_entry*> members_; | |
439 | ||
440 | // Unused global symbols from this archive. | |
441 | std::vector<Stringpool::Key> unused_syms_; | |
442 | }; | |
443 | ||
3ce2c28e ILT |
444 | // This class contains the information needed during an incremental |
445 | // build about the inputs necessary to build the .gnu_incremental_inputs. | |
09ec0418 | 446 | |
3ce2c28e ILT |
447 | class Incremental_inputs |
448 | { | |
449 | public: | |
09ec0418 CC |
450 | typedef std::vector<Incremental_input_entry*> Input_list; |
451 | ||
3ce2c28e | 452 | Incremental_inputs() |
09ec0418 CC |
453 | : inputs_(), command_line_(), command_line_key_(0), |
454 | strtab_(new Stringpool()), current_object_(NULL), | |
455 | current_object_entry_(NULL), inputs_section_(NULL), | |
456 | symtab_section_(NULL), relocs_section_(NULL), | |
457 | reloc_count_(0) | |
3ce2c28e | 458 | { } |
09ec0418 | 459 | |
3ce2c28e ILT |
460 | ~Incremental_inputs() { delete this->strtab_; } |
461 | ||
462 | // Record the command line. | |
463 | void | |
464 | report_command_line(int argc, const char* const* argv); | |
072fe7ce | 465 | |
09ec0418 CC |
466 | // Record the initial info for archive file ARCHIVE. |
467 | void | |
cdc29364 CC |
468 | report_archive_begin(Library_base* arch, unsigned int arg_serial, |
469 | Script_info* script_info); | |
09ec0418 CC |
470 | |
471 | // Record the final info for archive file ARCHIVE. | |
472 | void | |
e0c52780 | 473 | report_archive_end(Library_base* arch); |
09ec0418 CC |
474 | |
475 | // Record the info for object file OBJ. If ARCH is not NULL, | |
476 | // attach the object file to the archive. | |
072fe7ce | 477 | void |
cdc29364 CC |
478 | report_object(Object* obj, unsigned int arg_serial, Library_base* arch, |
479 | Script_info* script_info); | |
072fe7ce | 480 | |
09ec0418 | 481 | // Record an input section belonging to object file OBJ. |
072fe7ce | 482 | void |
09ec0418 CC |
483 | report_input_section(Object* obj, unsigned int shndx, const char* name, |
484 | off_t sh_size); | |
072fe7ce | 485 | |
09ec0418 | 486 | // Record the info for input script SCRIPT. |
072fe7ce | 487 | void |
cdc29364 | 488 | report_script(Script_info* script, unsigned int arg_serial, |
09ec0418 CC |
489 | Timespec mtime); |
490 | ||
491 | // Return the running count of incremental relocations. | |
492 | unsigned int | |
493 | get_reloc_count() const | |
494 | { return this->reloc_count_; } | |
072fe7ce | 495 | |
09ec0418 | 496 | // Update the running count of incremental relocations. |
072fe7ce | 497 | void |
09ec0418 CC |
498 | set_reloc_count(unsigned int count) |
499 | { this->reloc_count_ = count; } | |
072fe7ce | 500 | |
3ce2c28e ILT |
501 | // Prepare for layout. Called from Layout::finalize. |
502 | void | |
503 | finalize(); | |
504 | ||
09ec0418 CC |
505 | // Create the .gnu_incremental_inputs and related sections. |
506 | void | |
507 | create_data_sections(Symbol_table* symtab); | |
508 | ||
509 | // Return the .gnu_incremental_inputs section. | |
3ce2c28e | 510 | Output_section_data* |
09ec0418 CC |
511 | inputs_section() const |
512 | { return this->inputs_section_; } | |
513 | ||
514 | // Return the .gnu_incremental_symtab section. | |
515 | Output_data_space* | |
516 | symtab_section() const | |
517 | { return this->symtab_section_; } | |
518 | ||
519 | // Return the .gnu_incremental_relocs section. | |
520 | Output_data_space* | |
521 | relocs_section() const | |
522 | { return this->relocs_section_; } | |
072fe7ce | 523 | |
0e70b911 CC |
524 | // Return the .gnu_incremental_got_plt section. |
525 | Output_data_space* | |
526 | got_plt_section() const | |
527 | { return this->got_plt_section_; } | |
528 | ||
072fe7ce | 529 | // Return the .gnu_incremental_strtab stringpool. |
3ce2c28e | 530 | Stringpool* |
09ec0418 | 531 | get_stringpool() const |
3ce2c28e ILT |
532 | { return this->strtab_; } |
533 | ||
c4aa1e2d ILT |
534 | // Return the canonical form of the command line, as will be stored in |
535 | // .gnu_incremental_strtab. | |
536 | const std::string& | |
09ec0418 | 537 | command_line() const |
c4aa1e2d ILT |
538 | { return this->command_line_; } |
539 | ||
09ec0418 CC |
540 | // Return the stringpool key of the command line. |
541 | Stringpool::Key | |
542 | command_line_key() const | |
543 | { return this->command_line_key_; } | |
544 | ||
545 | // Return the number of input files. | |
546 | int | |
547 | input_file_count() const | |
548 | { return this->inputs_.size(); } | |
549 | ||
550 | // Return the input files. | |
551 | const Input_list& | |
552 | input_files() const | |
c4aa1e2d ILT |
553 | { return this->inputs_; } |
554 | ||
09ec0418 CC |
555 | // Return the sh_entsize value for the .gnu_incremental_relocs section. |
556 | unsigned int | |
557 | relocs_entsize() const; | |
558 | ||
3ce2c28e | 559 | private: |
09ec0418 CC |
560 | // The list of input files. |
561 | Input_list inputs_; | |
072fe7ce | 562 | |
09ec0418 CC |
563 | // Canonical form of the command line, as will be stored in |
564 | // .gnu_incremental_strtab. | |
565 | std::string command_line_; | |
072fe7ce | 566 | |
09ec0418 CC |
567 | // The key of the command line string in the string pool. |
568 | Stringpool::Key command_line_key_; | |
569 | ||
570 | // The .gnu_incremental_strtab string pool associated with the | |
571 | // .gnu_incremental_inputs. | |
572 | Stringpool* strtab_; | |
573 | ||
574 | // Keep track of the object currently being processed. | |
575 | Object* current_object_; | |
576 | Incremental_object_entry* current_object_entry_; | |
577 | ||
578 | // The .gnu_incremental_inputs section. | |
579 | Output_section_data* inputs_section_; | |
072fe7ce | 580 | |
09ec0418 CC |
581 | // The .gnu_incremental_symtab section. |
582 | Output_data_space* symtab_section_; | |
583 | ||
584 | // The .gnu_incremental_relocs section. | |
585 | Output_data_space* relocs_section_; | |
586 | ||
0e70b911 CC |
587 | // The .gnu_incremental_got_plt section. |
588 | Output_data_space* got_plt_section_; | |
589 | ||
09ec0418 CC |
590 | // Total count of incremental relocations. Updated during Scan_relocs |
591 | // phase at the completion of each object file. | |
592 | unsigned int reloc_count_; | |
593 | }; | |
594 | ||
cdc29364 CC |
595 | // Reader class for global symbol info from an object file entry in |
596 | // the .gnu_incremental_inputs section. | |
597 | ||
598 | template<bool big_endian> | |
599 | class Incremental_global_symbol_reader | |
600 | { | |
601 | private: | |
602 | typedef elfcpp::Swap<32, big_endian> Swap32; | |
603 | ||
604 | public: | |
605 | Incremental_global_symbol_reader(const unsigned char* p) | |
606 | : p_(p) | |
607 | { } | |
608 | ||
609 | unsigned int | |
610 | output_symndx() const | |
611 | { return Swap32::readval(this->p_); } | |
612 | ||
613 | unsigned int | |
614 | shndx() const | |
615 | { return Swap32::readval(this->p_ + 4); } | |
616 | ||
617 | unsigned int | |
618 | next_offset() const | |
619 | { return Swap32::readval(this->p_ + 8); } | |
620 | ||
621 | unsigned int | |
622 | reloc_count() const | |
623 | { return Swap32::readval(this->p_ + 12); } | |
624 | ||
625 | unsigned int | |
626 | reloc_offset() const | |
627 | { return Swap32::readval(this->p_ + 16); } | |
628 | ||
629 | private: | |
630 | // Base address of the symbol entry. | |
631 | const unsigned char* p_; | |
632 | }; | |
633 | ||
09ec0418 CC |
634 | // Reader class for .gnu_incremental_inputs section. |
635 | ||
636 | template<int size, bool big_endian> | |
637 | class Incremental_inputs_reader | |
638 | { | |
639 | private: | |
640 | typedef elfcpp::Swap<size, big_endian> Swap; | |
641 | typedef elfcpp::Swap<16, big_endian> Swap16; | |
642 | typedef elfcpp::Swap<32, big_endian> Swap32; | |
643 | typedef elfcpp::Swap<64, big_endian> Swap64; | |
644 | ||
645 | public: | |
b961d0d7 CC |
646 | Incremental_inputs_reader() |
647 | : p_(NULL), strtab_(NULL, 0), input_file_count_(0) | |
648 | { } | |
649 | ||
650 | Incremental_inputs_reader(const unsigned char* p, | |
651 | const elfcpp::Elf_strtab& strtab) | |
09ec0418 CC |
652 | : p_(p), strtab_(strtab) |
653 | { this->input_file_count_ = Swap32::readval(this->p_ + 4); } | |
654 | ||
655 | // Return the version number. | |
656 | unsigned int | |
657 | version() const | |
658 | { return Swap32::readval(this->p_); } | |
659 | ||
660 | // Return the count of input file entries. | |
661 | unsigned int | |
662 | input_file_count() const | |
663 | { return this->input_file_count_; } | |
664 | ||
665 | // Return the command line. | |
666 | const char* | |
667 | command_line() const | |
072fe7ce | 668 | { |
09ec0418 CC |
669 | unsigned int offset = Swap32::readval(this->p_ + 8); |
670 | return this->get_string(offset); | |
671 | } | |
072fe7ce | 672 | |
09ec0418 CC |
673 | // Reader class for an input file entry and its supplemental info. |
674 | class Incremental_input_entry_reader | |
675 | { | |
676 | public: | |
677 | Incremental_input_entry_reader(const Incremental_inputs_reader* inputs, | |
678 | unsigned int offset) | |
679 | : inputs_(inputs), offset_(offset) | |
680 | { | |
681 | this->info_offset_ = Swap32::readval(inputs->p_ + offset + 4); | |
cdc29364 | 682 | this->flags_ = Swap16::readval(this->inputs_->p_ + offset + 20); |
09ec0418 CC |
683 | } |
684 | ||
685 | // Return the filename. | |
686 | const char* | |
687 | filename() const | |
688 | { | |
689 | unsigned int offset = Swap32::readval(this->inputs_->p_ + this->offset_); | |
690 | return this->inputs_->get_string(offset); | |
691 | } | |
072fe7ce | 692 | |
cdc29364 CC |
693 | // Return the argument serial number. |
694 | unsigned int | |
695 | arg_serial() const | |
696 | { | |
697 | return Swap16::readval(this->inputs_->p_ + this->offset_ + 22); | |
698 | } | |
699 | ||
09ec0418 CC |
700 | // Return the timestamp. |
701 | Timespec | |
702 | get_mtime() const | |
703 | { | |
704 | Timespec t; | |
705 | const unsigned char* p = this->inputs_->p_ + this->offset_ + 8; | |
706 | t.seconds = Swap64::readval(p); | |
707 | t.nanoseconds = Swap32::readval(p+8); | |
708 | return t; | |
709 | } | |
710 | ||
711 | // Return the type of input file. | |
712 | Incremental_input_type | |
713 | type() const | |
cdc29364 CC |
714 | { return static_cast<Incremental_input_type>(this->flags_ & 0xff); } |
715 | ||
716 | // Return TRUE if the file was found in a system directory. | |
717 | bool | |
718 | is_in_system_directory() const | |
719 | { return (this->flags_ & INCREMENTAL_INPUT_IN_SYSTEM_DIR) != 0; } | |
09ec0418 CC |
720 | |
721 | // Return the input section count -- for objects only. | |
722 | unsigned int | |
723 | get_input_section_count() const | |
98fa85cb | 724 | { |
cdc29364 CC |
725 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT |
726 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
09ec0418 CC |
727 | return Swap32::readval(this->inputs_->p_ + this->info_offset_); |
728 | } | |
729 | ||
730 | // Return the offset of the supplemental info for symbol SYMNDX -- | |
731 | // for objects only. | |
732 | unsigned int | |
733 | get_symbol_offset(unsigned int symndx) const | |
734 | { | |
cdc29364 CC |
735 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT |
736 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
09ec0418 CC |
737 | |
738 | unsigned int section_count = this->get_input_section_count(); | |
f0f9babf | 739 | return (this->info_offset_ + 16 |
09ec0418 | 740 | + section_count * input_section_entry_size |
cdc29364 | 741 | + symndx * 20); |
09ec0418 CC |
742 | } |
743 | ||
744 | // Return the global symbol count -- for objects & shared libraries only. | |
745 | unsigned int | |
746 | get_global_symbol_count() const | |
747 | { | |
cdc29364 | 748 | switch (this->type()) |
09ec0418 CC |
749 | { |
750 | case INCREMENTAL_INPUT_OBJECT: | |
751 | case INCREMENTAL_INPUT_ARCHIVE_MEMBER: | |
752 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 4); | |
753 | case INCREMENTAL_INPUT_SHARED_LIBRARY: | |
754 | return Swap32::readval(this->inputs_->p_ + this->info_offset_); | |
755 | default: | |
756 | gold_unreachable(); | |
757 | } | |
758 | } | |
759 | ||
f0f9babf CC |
760 | // Return the offset of the first local symbol -- for objects only. |
761 | unsigned int | |
762 | get_local_symbol_offset() const | |
763 | { | |
764 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT | |
765 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
766 | ||
767 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 8); | |
768 | } | |
769 | ||
770 | // Return the local symbol count -- for objects only. | |
771 | unsigned int | |
772 | get_local_symbol_count() const | |
773 | { | |
774 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT | |
775 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
776 | ||
777 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 12); | |
778 | } | |
779 | ||
c7975edd CC |
780 | // Return the object count -- for scripts only. |
781 | unsigned int | |
782 | get_object_count() const | |
783 | { | |
cdc29364 | 784 | gold_assert(this->type() == INCREMENTAL_INPUT_SCRIPT); |
c7975edd CC |
785 | return Swap32::readval(this->inputs_->p_ + this->info_offset_); |
786 | } | |
787 | ||
788 | // Return the input file offset for object N -- for scripts only. | |
789 | unsigned int | |
790 | get_object_offset(unsigned int n) const | |
791 | { | |
cdc29364 | 792 | gold_assert(this->type() == INCREMENTAL_INPUT_SCRIPT); |
c7975edd CC |
793 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ |
794 | + 4 + n * 4); | |
795 | } | |
796 | ||
09ec0418 CC |
797 | // Return the member count -- for archives only. |
798 | unsigned int | |
799 | get_member_count() const | |
800 | { | |
cdc29364 | 801 | gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE); |
09ec0418 CC |
802 | return Swap32::readval(this->inputs_->p_ + this->info_offset_); |
803 | } | |
44453f85 | 804 | |
09ec0418 CC |
805 | // Return the unused symbol count -- for archives only. |
806 | unsigned int | |
807 | get_unused_symbol_count() const | |
808 | { | |
cdc29364 | 809 | gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE); |
09ec0418 CC |
810 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 4); |
811 | } | |
44453f85 | 812 | |
09ec0418 CC |
813 | // Return the input file offset for archive member N -- for archives only. |
814 | unsigned int | |
815 | get_member_offset(unsigned int n) const | |
816 | { | |
cdc29364 | 817 | gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE); |
09ec0418 CC |
818 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ |
819 | + 8 + n * 4); | |
820 | } | |
821 | ||
822 | // Return the Nth unused global symbol -- for archives only. | |
823 | const char* | |
824 | get_unused_symbol(unsigned int n) const | |
825 | { | |
cdc29364 | 826 | gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE); |
09ec0418 CC |
827 | unsigned int member_count = this->get_member_count(); |
828 | unsigned int offset = Swap32::readval(this->inputs_->p_ | |
829 | + this->info_offset_ + 8 | |
830 | + member_count * 4 | |
831 | + n * 4); | |
832 | return this->inputs_->get_string(offset); | |
833 | } | |
834 | ||
835 | // Information about an input section. | |
836 | struct Input_section_info | |
837 | { | |
838 | const char* name; | |
839 | unsigned int output_shndx; | |
840 | off_t sh_offset; | |
841 | off_t sh_size; | |
98fa85cb | 842 | }; |
072fe7ce | 843 | |
09ec0418 CC |
844 | // Return info about the Nth input section -- for objects only. |
845 | Input_section_info | |
846 | get_input_section(unsigned int n) const | |
847 | { | |
848 | Input_section_info info; | |
849 | const unsigned char* p = (this->inputs_->p_ | |
f0f9babf | 850 | + this->info_offset_ + 16 |
09ec0418 CC |
851 | + n * input_section_entry_size); |
852 | unsigned int name_offset = Swap32::readval(p); | |
853 | info.name = this->inputs_->get_string(name_offset); | |
854 | info.output_shndx = Swap32::readval(p + 4); | |
855 | info.sh_offset = Swap::readval(p + 8); | |
856 | info.sh_size = Swap::readval(p + 8 + size / 8); | |
857 | return info; | |
858 | } | |
859 | ||
09ec0418 | 860 | // Return info about the Nth global symbol -- for objects only. |
cdc29364 CC |
861 | Incremental_global_symbol_reader<big_endian> |
862 | get_global_symbol_reader(unsigned int n) const | |
09ec0418 | 863 | { |
cdc29364 CC |
864 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT |
865 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
09ec0418 CC |
866 | unsigned int section_count = this->get_input_section_count(); |
867 | const unsigned char* p = (this->inputs_->p_ | |
f0f9babf | 868 | + this->info_offset_ + 16 |
09ec0418 | 869 | + section_count * input_section_entry_size |
cdc29364 CC |
870 | + n * 20); |
871 | return Incremental_global_symbol_reader<big_endian>(p); | |
872 | } | |
873 | ||
874 | // Return the output symbol index for the Nth global symbol -- for shared | |
875 | // libraries only. Sets *IS_DEF to TRUE if the symbol is defined in this | |
876 | // input file. | |
877 | unsigned int | |
878 | get_output_symbol_index(unsigned int n, bool* is_def) | |
879 | { | |
880 | gold_assert(this->type() == INCREMENTAL_INPUT_SHARED_LIBRARY); | |
881 | const unsigned char* p = (this->inputs_->p_ | |
882 | + this->info_offset_ + 4 | |
883 | + n * 4); | |
884 | unsigned int output_symndx = Swap32::readval(p); | |
885 | *is_def = (output_symndx & (1U << 31)) != 0; | |
886 | return output_symndx & ((1U << 31) - 1); | |
09ec0418 | 887 | } |
44453f85 | 888 | |
09ec0418 CC |
889 | private: |
890 | // Size of an input section entry. | |
891 | static const unsigned int input_section_entry_size = 8 + 2 * size / 8; | |
892 | // The reader instance for the containing section. | |
893 | const Incremental_inputs_reader* inputs_; | |
cdc29364 CC |
894 | // The flags, including the type of input file. |
895 | unsigned int flags_; | |
09ec0418 CC |
896 | // Section offset to the input file entry. |
897 | unsigned int offset_; | |
898 | // Section offset to the supplemental info for the input file. | |
899 | unsigned int info_offset_; | |
072fe7ce ILT |
900 | }; |
901 | ||
cdc29364 CC |
902 | // Return the offset of an input file entry given its index N. |
903 | unsigned int | |
904 | input_file_offset(unsigned int n) const | |
905 | { | |
906 | gold_assert(n < this->input_file_count_); | |
907 | return 16 + n * 24; | |
908 | } | |
909 | ||
910 | // Return the index of an input file entry given its OFFSET. | |
911 | unsigned int | |
912 | input_file_index(unsigned int offset) const | |
913 | { | |
914 | int n = (offset - 16) / 24; | |
915 | gold_assert(input_file_offset(n) == offset); | |
916 | return n; | |
917 | } | |
918 | ||
09ec0418 CC |
919 | // Return a reader for the Nth input file entry. |
920 | Incremental_input_entry_reader | |
921 | input_file(unsigned int n) const | |
cdc29364 CC |
922 | { return Incremental_input_entry_reader(this, this->input_file_offset(n)); } |
923 | ||
924 | // Return a reader for the input file entry at OFFSET. | |
925 | Incremental_input_entry_reader | |
926 | input_file_at_offset(unsigned int offset) const | |
09ec0418 | 927 | { |
cdc29364 CC |
928 | gold_assert(offset < 16 + this->input_file_count_ * 24); |
929 | return Incremental_input_entry_reader(this, offset); | |
09ec0418 CC |
930 | } |
931 | ||
94a3fc8b CC |
932 | // Return a reader for the global symbol info at OFFSET. |
933 | Incremental_global_symbol_reader<big_endian> | |
934 | global_symbol_reader_at_offset(unsigned int offset) const | |
935 | { | |
936 | const unsigned char* p = this->p_ + offset; | |
937 | return Incremental_global_symbol_reader<big_endian>(p); | |
938 | } | |
939 | ||
09ec0418 CC |
940 | private: |
941 | // Lookup a string in the ELF string table. | |
942 | const char* get_string(unsigned int offset) const | |
943 | { | |
944 | const char* s; | |
945 | if (this->strtab_.get_c_string(offset, &s)) | |
946 | return s; | |
947 | return NULL; | |
948 | } | |
949 | ||
950 | // Base address of the .gnu_incremental_inputs section. | |
951 | const unsigned char* p_; | |
952 | // The associated ELF string table. | |
953 | elfcpp::Elf_strtab strtab_; | |
954 | // The number of input file entries in this section. | |
955 | unsigned int input_file_count_; | |
956 | }; | |
957 | ||
958 | // Reader class for the .gnu_incremental_symtab section. | |
072fe7ce | 959 | |
09ec0418 CC |
960 | template<bool big_endian> |
961 | class Incremental_symtab_reader | |
962 | { | |
963 | public: | |
b961d0d7 CC |
964 | Incremental_symtab_reader() |
965 | : p_(NULL), len_(0) | |
966 | { } | |
967 | ||
968 | Incremental_symtab_reader(const unsigned char* p, off_t len) | |
969 | : p_(p), len_(len) | |
09ec0418 | 970 | { } |
44453f85 | 971 | |
b961d0d7 CC |
972 | // Return the count of symbols in this section. |
973 | unsigned int | |
974 | symbol_count() const | |
975 | { return static_cast<unsigned int>(this->len_ / 4); } | |
976 | ||
09ec0418 | 977 | // Return the list head for symbol table entry N. |
b961d0d7 CC |
978 | unsigned int |
979 | get_list_head(unsigned int n) const | |
09ec0418 | 980 | { return elfcpp::Swap<32, big_endian>::readval(this->p_ + 4 * n); } |
072fe7ce | 981 | |
09ec0418 CC |
982 | private: |
983 | // Base address of the .gnu_incremental_relocs section. | |
984 | const unsigned char* p_; | |
b961d0d7 CC |
985 | // Size of the section. |
986 | off_t len_; | |
09ec0418 | 987 | }; |
3ce2c28e | 988 | |
09ec0418 | 989 | // Reader class for the .gnu_incremental_relocs section. |
c4aa1e2d | 990 | |
09ec0418 CC |
991 | template<int size, bool big_endian> |
992 | class Incremental_relocs_reader | |
993 | { | |
994 | private: | |
995 | // Size of each field. | |
996 | static const unsigned int field_size = size / 8; | |
c4aa1e2d | 997 | |
09ec0418 CC |
998 | public: |
999 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
1000 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Addend; | |
1001 | ||
1002 | // Size of each entry. | |
1003 | static const unsigned int reloc_size = 8 + 2 * field_size; | |
1004 | ||
b961d0d7 CC |
1005 | Incremental_relocs_reader() |
1006 | : p_(NULL), len_(0) | |
1007 | { } | |
1008 | ||
1009 | Incremental_relocs_reader(const unsigned char* p, off_t len) | |
1010 | : p_(p), len_(len) | |
09ec0418 CC |
1011 | { } |
1012 | ||
b961d0d7 CC |
1013 | // Return the count of relocations in this section. |
1014 | unsigned int | |
1015 | reloc_count() const | |
1016 | { return static_cast<unsigned int>(this->len_ / reloc_size); } | |
1017 | ||
09ec0418 CC |
1018 | // Return the relocation type for relocation entry at offset OFF. |
1019 | unsigned int | |
0e70b911 | 1020 | get_r_type(unsigned int off) const |
cdc29364 | 1021 | { return elfcpp::Swap<32, big_endian>::readval(this->p_ + off); } |
09ec0418 CC |
1022 | |
1023 | // Return the output section index for relocation entry at offset OFF. | |
1024 | unsigned int | |
0e70b911 | 1025 | get_r_shndx(unsigned int off) const |
cdc29364 | 1026 | { return elfcpp::Swap<32, big_endian>::readval(this->p_ + off + 4); } |
09ec0418 CC |
1027 | |
1028 | // Return the output section offset for relocation entry at offset OFF. | |
1029 | Address | |
0e70b911 | 1030 | get_r_offset(unsigned int off) const |
cdc29364 | 1031 | { return elfcpp::Swap<size, big_endian>::readval(this->p_ + off + 8); } |
09ec0418 CC |
1032 | |
1033 | // Return the addend for relocation entry at offset OFF. | |
1034 | Addend | |
0e70b911 | 1035 | get_r_addend(unsigned int off) const |
09ec0418 CC |
1036 | { |
1037 | return elfcpp::Swap<size, big_endian>::readval(this->p_ + off + 8 | |
1038 | + this->field_size); | |
1039 | } | |
1040 | ||
cdc29364 CC |
1041 | // Return a pointer to the relocation entry at offset OFF. |
1042 | const unsigned char* | |
1043 | data(unsigned int off) const | |
1044 | { return this->p_ + off; } | |
1045 | ||
09ec0418 CC |
1046 | private: |
1047 | // Base address of the .gnu_incremental_relocs section. | |
1048 | const unsigned char* p_; | |
b961d0d7 CC |
1049 | // Size of the section. |
1050 | off_t len_; | |
3ce2c28e ILT |
1051 | }; |
1052 | ||
0e70b911 CC |
1053 | // Reader class for the .gnu_incremental_got_plt section. |
1054 | ||
1055 | template<bool big_endian> | |
1056 | class Incremental_got_plt_reader | |
1057 | { | |
1058 | public: | |
b961d0d7 CC |
1059 | Incremental_got_plt_reader() |
1060 | : p_(NULL), got_count_(0), got_desc_p_(NULL), plt_desc_p_(NULL) | |
1061 | { } | |
1062 | ||
0e70b911 CC |
1063 | Incremental_got_plt_reader(const unsigned char* p) : p_(p) |
1064 | { | |
1065 | this->got_count_ = elfcpp::Swap<32, big_endian>::readval(p); | |
1066 | this->got_desc_p_ = p + 8 + ((this->got_count_ + 3) & ~3); | |
1067 | this->plt_desc_p_ = this->got_desc_p_ + this->got_count_ * 4; | |
1068 | } | |
1069 | ||
1070 | // Return the GOT entry count. | |
1071 | unsigned int | |
1072 | get_got_entry_count() const | |
1073 | { | |
1074 | return this->got_count_; | |
1075 | } | |
1076 | ||
1077 | // Return the PLT entry count. | |
1078 | unsigned int | |
1079 | get_plt_entry_count() const | |
1080 | { | |
1081 | return elfcpp::Swap<32, big_endian>::readval(this->p_ + 4); | |
1082 | } | |
1083 | ||
1084 | // Return the GOT type for GOT entry N. | |
1085 | unsigned int | |
1086 | get_got_type(unsigned int n) | |
1087 | { | |
1088 | return this->p_[8 + n]; | |
1089 | } | |
1090 | ||
1091 | // Return the GOT descriptor for GOT entry N. | |
1092 | unsigned int | |
1093 | get_got_desc(unsigned int n) | |
1094 | { | |
1095 | return elfcpp::Swap<32, big_endian>::readval(this->got_desc_p_ + n * 4); | |
1096 | } | |
1097 | ||
1098 | // Return the PLT descriptor for PLT entry N. | |
1099 | unsigned int | |
1100 | get_plt_desc(unsigned int n) | |
1101 | { | |
1102 | return elfcpp::Swap<32, big_endian>::readval(this->plt_desc_p_ + n * 4); | |
1103 | } | |
1104 | ||
1105 | private: | |
1106 | // Base address of the .gnu_incremental_got_plt section. | |
1107 | const unsigned char* p_; | |
1108 | // GOT entry count. | |
1109 | unsigned int got_count_; | |
1110 | // Base address of the GOT descriptor array. | |
1111 | const unsigned char* got_desc_p_; | |
1112 | // Base address of the PLT descriptor array. | |
1113 | const unsigned char* plt_desc_p_; | |
1114 | }; | |
1115 | ||
b961d0d7 CC |
1116 | // An object representing the ELF file we edit during an incremental build. |
1117 | // Similar to Object or Dynobj, but operates on Output_file and contains | |
1118 | // methods to support incremental updating. This is the abstract parent class | |
1119 | // implemented in Sized_incremental_binary<size, big_endian> for a specific | |
1120 | // endianness and size. | |
1121 | ||
1122 | class Incremental_binary | |
1123 | { | |
1124 | public: | |
1125 | Incremental_binary(Output_file* output, Target* target) | |
cdc29364 CC |
1126 | : input_args_map_(), library_map_(), script_map_(), |
1127 | output_(output), target_(target) | |
b961d0d7 CC |
1128 | { } |
1129 | ||
1130 | virtual | |
1131 | ~Incremental_binary() | |
1132 | { } | |
1133 | ||
1134 | // Check the .gnu_incremental_inputs section to see whether an incremental | |
1135 | // build is possible. | |
1136 | bool | |
cdc29364 CC |
1137 | check_inputs(const Command_line& cmdline, |
1138 | Incremental_inputs* incremental_inputs) | |
1139 | { return this->do_check_inputs(cmdline, incremental_inputs); } | |
b961d0d7 CC |
1140 | |
1141 | // Report an error. | |
1142 | void | |
1143 | error(const char* format, ...) const ATTRIBUTE_PRINTF_2; | |
1144 | ||
cdc29364 CC |
1145 | // Proxy class for a sized Incremental_input_entry_reader. |
1146 | ||
b961d0d7 CC |
1147 | class Input_reader |
1148 | { | |
1149 | public: | |
1150 | Input_reader() | |
1151 | { } | |
1152 | ||
1153 | virtual | |
1154 | ~Input_reader() | |
1155 | { } | |
1156 | ||
1157 | const char* | |
1158 | filename() const | |
1159 | { return this->do_filename(); } | |
1160 | ||
1161 | Timespec | |
1162 | get_mtime() const | |
1163 | { return this->do_get_mtime(); } | |
1164 | ||
1165 | Incremental_input_type | |
1166 | type() const | |
1167 | { return this->do_type(); } | |
1168 | ||
cdc29364 CC |
1169 | unsigned int |
1170 | arg_serial() const | |
1171 | { return this->do_arg_serial(); } | |
1172 | ||
1173 | unsigned int | |
1174 | get_unused_symbol_count() const | |
1175 | { return this->do_get_unused_symbol_count(); } | |
1176 | ||
1177 | const char* | |
1178 | get_unused_symbol(unsigned int n) const | |
1179 | { return this->do_get_unused_symbol(n); } | |
1180 | ||
b961d0d7 CC |
1181 | protected: |
1182 | virtual const char* | |
1183 | do_filename() const = 0; | |
1184 | ||
1185 | virtual Timespec | |
1186 | do_get_mtime() const = 0; | |
1187 | ||
1188 | virtual Incremental_input_type | |
1189 | do_type() const = 0; | |
cdc29364 CC |
1190 | |
1191 | virtual unsigned int | |
1192 | do_arg_serial() const = 0; | |
1193 | ||
1194 | virtual unsigned int | |
1195 | do_get_unused_symbol_count() const = 0; | |
1196 | ||
1197 | virtual const char* | |
1198 | do_get_unused_symbol(unsigned int n) const = 0; | |
b961d0d7 CC |
1199 | }; |
1200 | ||
cdc29364 CC |
1201 | // Return the number of input files. |
1202 | unsigned int | |
1203 | input_file_count() const | |
1204 | { return this->do_input_file_count(); } | |
1205 | ||
1206 | // Return an Input_reader for input file N. | |
1207 | const Input_reader* | |
1208 | get_input_reader(unsigned int n) const | |
1209 | { return this->do_get_input_reader(n); } | |
1210 | ||
1211 | // Return TRUE if the input file N has changed since the last link. | |
1212 | bool | |
1213 | file_has_changed(unsigned int n) const | |
1214 | { return this->do_file_has_changed(n); } | |
1215 | ||
1216 | // Return the Input_argument for input file N. Returns NULL if | |
1217 | // the Input_argument is not available. | |
1218 | const Input_argument* | |
1219 | get_input_argument(unsigned int n) const | |
1220 | { | |
1221 | const Input_reader* input_file = this->do_get_input_reader(n); | |
1222 | unsigned int arg_serial = input_file->arg_serial(); | |
1223 | if (arg_serial == 0 || arg_serial > this->input_args_map_.size()) | |
1224 | return NULL; | |
1225 | return this->input_args_map_[arg_serial - 1]; | |
1226 | } | |
1227 | ||
1228 | // Return an Incremental_library for the given input file. | |
1229 | Incremental_library* | |
1230 | get_library(unsigned int n) | |
1231 | { return this->library_map_[n]; } | |
1232 | ||
1233 | // Return a Script_info for the given input file. | |
1234 | Script_info* | |
1235 | get_script_info(unsigned int n) | |
1236 | { return this->script_map_[n]; } | |
1237 | ||
1238 | // Initialize the layout of the output file based on the existing | |
1239 | // output file. | |
1240 | void | |
1241 | init_layout(Layout* layout) | |
1242 | { this->do_init_layout(layout); } | |
1243 | ||
1244 | // Mark regions of the input file that must be kept unchanged. | |
1245 | void | |
1246 | reserve_layout(unsigned int input_file_index) | |
1247 | { this->do_reserve_layout(input_file_index); } | |
b961d0d7 | 1248 | |
4829d394 CC |
1249 | // Process the GOT and PLT entries from the existing output file. |
1250 | void | |
1251 | process_got_plt(Symbol_table* symtab, Layout* layout) | |
1252 | { this->do_process_got_plt(symtab, layout); } | |
1253 | ||
94a3fc8b CC |
1254 | // Apply incremental relocations for symbols whose values have changed. |
1255 | void | |
1256 | apply_incremental_relocs(const Symbol_table* symtab, Layout* layout, | |
1257 | Output_file* of) | |
1258 | { this->do_apply_incremental_relocs(symtab, layout, of); } | |
1259 | ||
b961d0d7 CC |
1260 | // Functions and types for the elfcpp::Elf_file interface. This |
1261 | // permit us to use Incremental_binary as the File template parameter for | |
1262 | // elfcpp::Elf_file. | |
1263 | ||
1264 | // The View class is returned by view. It must support a single | |
1265 | // method, data(). This is trivial, because Output_file::get_output_view | |
1266 | // does what we need. | |
1267 | class View | |
1268 | { | |
1269 | public: | |
1270 | View(const unsigned char* p) | |
1271 | : p_(p) | |
1272 | { } | |
1273 | ||
1274 | const unsigned char* | |
1275 | data() const | |
1276 | { return this->p_; } | |
1277 | ||
1278 | private: | |
1279 | const unsigned char* p_; | |
1280 | }; | |
1281 | ||
1282 | // Return a View. | |
1283 | View | |
1284 | view(off_t file_offset, section_size_type data_size) | |
1285 | { return View(this->output_->get_input_view(file_offset, data_size)); } | |
1286 | ||
1287 | // A location in the file. | |
1288 | struct Location | |
1289 | { | |
1290 | off_t file_offset; | |
1291 | off_t data_size; | |
1292 | ||
1293 | Location(off_t fo, section_size_type ds) | |
1294 | : file_offset(fo), data_size(ds) | |
1295 | { } | |
1296 | ||
1297 | Location() | |
1298 | : file_offset(0), data_size(0) | |
1299 | { } | |
1300 | }; | |
1301 | ||
1302 | // Get a View given a Location. | |
1303 | View | |
1304 | view(Location loc) | |
1305 | { return View(this->view(loc.file_offset, loc.data_size)); } | |
1306 | ||
cdc29364 CC |
1307 | // Return the Output_file. |
1308 | Output_file* | |
1309 | output_file() | |
1310 | { return this->output_; } | |
1311 | ||
b961d0d7 CC |
1312 | protected: |
1313 | // Check the .gnu_incremental_inputs section to see whether an incremental | |
1314 | // build is possible. | |
1315 | virtual bool | |
cdc29364 CC |
1316 | do_check_inputs(const Command_line& cmdline, |
1317 | Incremental_inputs* incremental_inputs) = 0; | |
b961d0d7 | 1318 | |
cdc29364 | 1319 | // Return TRUE if input file N has changed since the last incremental link. |
b961d0d7 | 1320 | virtual bool |
cdc29364 CC |
1321 | do_file_has_changed(unsigned int n) const = 0; |
1322 | ||
1323 | // Initialize the layout of the output file based on the existing | |
1324 | // output file. | |
1325 | virtual void | |
1326 | do_init_layout(Layout* layout) = 0; | |
1327 | ||
1328 | // Mark regions of the input file that must be kept unchanged. | |
1329 | virtual void | |
1330 | do_reserve_layout(unsigned int input_file_index) = 0; | |
1331 | ||
4829d394 CC |
1332 | // Process the GOT and PLT entries from the existing output file. |
1333 | virtual void | |
1334 | do_process_got_plt(Symbol_table* symtab, Layout* layout) = 0; | |
1335 | ||
94a3fc8b CC |
1336 | // Apply incremental relocations for symbols whose values have changed. |
1337 | virtual void | |
1338 | do_apply_incremental_relocs(const Symbol_table*, Layout*, Output_file*) = 0; | |
1339 | ||
cdc29364 CC |
1340 | virtual unsigned int |
1341 | do_input_file_count() const = 0; | |
b961d0d7 | 1342 | |
cdc29364 CC |
1343 | virtual const Input_reader* |
1344 | do_get_input_reader(unsigned int) const = 0; | |
1345 | ||
1346 | // Map from input file index to Input_argument. | |
1347 | std::vector<const Input_argument*> input_args_map_; | |
1348 | // Map from an input file index to an Incremental_library. | |
1349 | std::vector<Incremental_library*> library_map_; | |
1350 | // Map from an input file index to a Script_info. | |
1351 | std::vector<Script_info*> script_map_; | |
b961d0d7 CC |
1352 | |
1353 | private: | |
1354 | // Edited output file object. | |
1355 | Output_file* output_; | |
1356 | // Target of the output file. | |
1357 | Target* target_; | |
1358 | }; | |
1359 | ||
1360 | template<int size, bool big_endian> | |
1361 | class Sized_incremental_binary : public Incremental_binary | |
1362 | { | |
1363 | public: | |
1364 | Sized_incremental_binary(Output_file* output, | |
1365 | const elfcpp::Ehdr<size, big_endian>& ehdr, | |
1366 | Target* target) | |
1367 | : Incremental_binary(output, target), elf_file_(this, ehdr), | |
4829d394 CC |
1368 | file_status_(NULL), section_map_(), symbol_map_(), main_symtab_loc_(), |
1369 | main_strtab_loc_(), has_incremental_info_(false), inputs_reader_(), | |
1370 | symtab_reader_(), relocs_reader_(), got_plt_reader_(), | |
cdc29364 | 1371 | input_entry_readers_() |
b961d0d7 CC |
1372 | { this->setup_readers(); } |
1373 | ||
4829d394 CC |
1374 | virtual |
1375 | ~Sized_incremental_binary() | |
1376 | { | |
1377 | if (this->file_status_ != NULL) | |
1378 | delete[] this->file_status_; | |
1379 | } | |
1380 | ||
b961d0d7 CC |
1381 | // Returns TRUE if the file contains incremental info. |
1382 | bool | |
1383 | has_incremental_info() const | |
1384 | { return this->has_incremental_info_; } | |
1385 | ||
4829d394 CC |
1386 | // Set the flag for input file N to indicate that the file is unchanged. |
1387 | void | |
1388 | set_file_is_unchanged(unsigned int n) | |
1389 | { | |
1390 | gold_assert(this->file_status_ != NULL); | |
1391 | this->file_status_[n / 8] |= 1U << (n % 8); | |
1392 | } | |
1393 | ||
1394 | // Returns TRUE if input file N is unchanged. | |
1395 | bool | |
1396 | file_is_unchanged(unsigned int n) const | |
1397 | { | |
1398 | gold_assert(this->file_status_ != NULL); | |
1399 | return (this->file_status_[n / 8] & (1U << (n % 8))) != 0; | |
1400 | } | |
1401 | ||
cdc29364 CC |
1402 | // Return the Output_section for section index SHNDX. |
1403 | Output_section* | |
1404 | output_section(unsigned int shndx) | |
1405 | { return this->section_map_[shndx]; } | |
1406 | ||
4829d394 | 1407 | // Map a symbol table entry from the base file to the output symbol table. |
94a3fc8b CC |
1408 | // SYMNDX is relative to the first forced-local or global symbol in the |
1409 | // input file symbol table. | |
1410 | void | |
1411 | add_global_symbol(unsigned int symndx, Symbol* gsym) | |
1412 | { this->symbol_map_[symndx] = gsym; } | |
1413 | ||
4829d394 | 1414 | // Map a symbol table entry from the base file to the output symbol table. |
94a3fc8b CC |
1415 | // SYMNDX is relative to the first forced-local or global symbol in the |
1416 | // input file symbol table. | |
1417 | Symbol* | |
1418 | global_symbol(unsigned int symndx) const | |
1419 | { return this->symbol_map_[symndx]; } | |
1420 | ||
b961d0d7 CC |
1421 | // Readers for the incremental info sections. |
1422 | ||
cdc29364 | 1423 | const Incremental_inputs_reader<size, big_endian>& |
b961d0d7 CC |
1424 | inputs_reader() const |
1425 | { return this->inputs_reader_; } | |
1426 | ||
cdc29364 | 1427 | const Incremental_symtab_reader<big_endian>& |
b961d0d7 CC |
1428 | symtab_reader() const |
1429 | { return this->symtab_reader_; } | |
1430 | ||
cdc29364 | 1431 | const Incremental_relocs_reader<size, big_endian>& |
b961d0d7 CC |
1432 | relocs_reader() const |
1433 | { return this->relocs_reader_; } | |
1434 | ||
cdc29364 | 1435 | const Incremental_got_plt_reader<big_endian>& |
b961d0d7 CC |
1436 | got_plt_reader() const |
1437 | { return this->got_plt_reader_; } | |
1438 | ||
cdc29364 CC |
1439 | void |
1440 | get_symtab_view(View* symtab_view, unsigned int* sym_count, | |
1441 | elfcpp::Elf_strtab* strtab); | |
1442 | ||
b961d0d7 | 1443 | protected: |
cdc29364 CC |
1444 | typedef Incremental_inputs_reader<size, big_endian> Inputs_reader; |
1445 | typedef typename Inputs_reader::Incremental_input_entry_reader | |
1446 | Input_entry_reader; | |
1447 | ||
b961d0d7 | 1448 | virtual bool |
cdc29364 CC |
1449 | do_check_inputs(const Command_line& cmdline, |
1450 | Incremental_inputs* incremental_inputs); | |
b961d0d7 | 1451 | |
cdc29364 | 1452 | // Return TRUE if input file N has changed since the last incremental link. |
b961d0d7 | 1453 | virtual bool |
cdc29364 CC |
1454 | do_file_has_changed(unsigned int n) const; |
1455 | ||
1456 | // Initialize the layout of the output file based on the existing | |
1457 | // output file. | |
1458 | virtual void | |
1459 | do_init_layout(Layout* layout); | |
1460 | ||
1461 | // Mark regions of the input file that must be kept unchanged. | |
1462 | virtual void | |
1463 | do_reserve_layout(unsigned int input_file_index); | |
1464 | ||
4829d394 CC |
1465 | // Process the GOT and PLT entries from the existing output file. |
1466 | virtual void | |
1467 | do_process_got_plt(Symbol_table* symtab, Layout* layout); | |
1468 | ||
94a3fc8b CC |
1469 | // Apply incremental relocations for symbols whose values have changed. |
1470 | virtual void | |
1471 | do_apply_incremental_relocs(const Symbol_table* symtab, Layout* layout, | |
1472 | Output_file* of); | |
1473 | ||
cdc29364 | 1474 | // Proxy class for a sized Incremental_input_entry_reader. |
b961d0d7 | 1475 | |
b961d0d7 CC |
1476 | class Sized_input_reader : public Input_reader |
1477 | { | |
1478 | public: | |
b961d0d7 CC |
1479 | Sized_input_reader(Input_entry_reader r) |
1480 | : Input_reader(), reader_(r) | |
1481 | { } | |
1482 | ||
1483 | virtual | |
1484 | ~Sized_input_reader() | |
1485 | { } | |
1486 | ||
1487 | private: | |
1488 | const char* | |
1489 | do_filename() const | |
1490 | { return this->reader_.filename(); } | |
1491 | ||
1492 | Timespec | |
1493 | do_get_mtime() const | |
1494 | { return this->reader_.get_mtime(); } | |
1495 | ||
1496 | Incremental_input_type | |
1497 | do_type() const | |
1498 | { return this->reader_.type(); } | |
1499 | ||
cdc29364 CC |
1500 | unsigned int |
1501 | do_arg_serial() const | |
1502 | { return this->reader_.arg_serial(); } | |
1503 | ||
1504 | unsigned int | |
1505 | do_get_unused_symbol_count() const | |
1506 | { return this->reader_.get_unused_symbol_count(); } | |
1507 | ||
1508 | const char* | |
1509 | do_get_unused_symbol(unsigned int n) const | |
1510 | { return this->reader_.get_unused_symbol(n); } | |
1511 | ||
b961d0d7 CC |
1512 | Input_entry_reader reader_; |
1513 | }; | |
1514 | ||
cdc29364 CC |
1515 | virtual unsigned int |
1516 | do_input_file_count() const | |
1517 | { return this->inputs_reader_.input_file_count(); } | |
1518 | ||
1519 | virtual const Input_reader* | |
1520 | do_get_input_reader(unsigned int n) const | |
1521 | { | |
1522 | gold_assert(n < this->input_entry_readers_.size()); | |
1523 | return &this->input_entry_readers_[n]; | |
1524 | } | |
b961d0d7 CC |
1525 | |
1526 | private: | |
1527 | bool | |
1528 | find_incremental_inputs_sections(unsigned int* p_inputs_shndx, | |
1529 | unsigned int* p_symtab_shndx, | |
1530 | unsigned int* p_relocs_shndx, | |
1531 | unsigned int* p_got_plt_shndx, | |
1532 | unsigned int* p_strtab_shndx); | |
1533 | ||
1534 | void | |
1535 | setup_readers(); | |
1536 | ||
1537 | // Output as an ELF file. | |
1538 | elfcpp::Elf_file<size, big_endian, Incremental_binary> elf_file_; | |
1539 | ||
4829d394 CC |
1540 | // Status flags for each input file. Each bit represents one input file; |
1541 | // 0 indicates that the file was replaced; 1 indicates that the file was | |
1542 | // unchanged. | |
1543 | unsigned char* file_status_; | |
1544 | ||
cdc29364 CC |
1545 | // Map section index to an Output_section in the updated layout. |
1546 | std::vector<Output_section*> section_map_; | |
1547 | ||
94a3fc8b CC |
1548 | // Map global symbols from the input file to the symbol table. |
1549 | std::vector<Symbol*> symbol_map_; | |
1550 | ||
4829d394 CC |
1551 | // Locations of the main symbol table and symbol string table. |
1552 | Location main_symtab_loc_; | |
1553 | Location main_strtab_loc_; | |
1554 | ||
b961d0d7 CC |
1555 | // Readers for the incremental info sections. |
1556 | bool has_incremental_info_; | |
1557 | Incremental_inputs_reader<size, big_endian> inputs_reader_; | |
1558 | Incremental_symtab_reader<big_endian> symtab_reader_; | |
1559 | Incremental_relocs_reader<size, big_endian> relocs_reader_; | |
1560 | Incremental_got_plt_reader<big_endian> got_plt_reader_; | |
cdc29364 CC |
1561 | std::vector<Sized_input_reader> input_entry_readers_; |
1562 | }; | |
1563 | ||
1564 | // An incremental Relobj. This class represents a relocatable object | |
1565 | // that has not changed since the last incremental link, and whose contents | |
1566 | // can be used directly from the base file. | |
1567 | ||
1568 | template<int size, bool big_endian> | |
1569 | class Sized_incr_relobj : public Sized_relobj_base<size, big_endian> | |
1570 | { | |
1571 | public: | |
1572 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
1573 | typedef typename Sized_relobj_base<size, big_endian>::Symbols Symbols; | |
1574 | ||
1575 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
1576 | ||
1577 | Sized_incr_relobj(const std::string& name, | |
1578 | Sized_incremental_binary<size, big_endian>* ibase, | |
1579 | unsigned int input_file_index); | |
1580 | ||
1581 | // Checks if the offset of input section SHNDX within its output | |
1582 | // section is invalid. | |
1583 | bool | |
1584 | is_output_section_offset_invalid(unsigned int shndx) const | |
1585 | { return this->section_offsets_[shndx] == invalid_address; } | |
1586 | ||
1587 | // Get the offset of input section SHNDX within its output section. | |
1588 | // This is -1 if the input section requires a special mapping, such | |
1589 | // as a merge section. The output section can be found in the | |
1590 | // output_sections_ field of the parent class Incrobj. | |
1591 | uint64_t | |
1592 | do_output_section_offset(unsigned int shndx) const | |
1593 | { | |
1594 | gold_assert(shndx < this->section_offsets_.size()); | |
1595 | Address off = this->section_offsets_[shndx]; | |
1596 | if (off == invalid_address) | |
1597 | return -1ULL; | |
1598 | return off; | |
1599 | } | |
1600 | ||
1601 | private: | |
f0f9babf CC |
1602 | // For convenience. |
1603 | typedef Sized_incr_relobj<size, big_endian> This; | |
1604 | static const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1605 | ||
cdc29364 CC |
1606 | typedef typename Sized_relobj_base<size, big_endian>::Output_sections |
1607 | Output_sections; | |
1608 | typedef Incremental_inputs_reader<size, big_endian> Inputs_reader; | |
1609 | typedef typename Inputs_reader::Incremental_input_entry_reader | |
1610 | Input_entry_reader; | |
1611 | ||
f0f9babf CC |
1612 | // A local symbol. |
1613 | struct Local_symbol | |
1614 | { | |
1615 | Local_symbol(const char* name_, Address value_, unsigned int size_, | |
1616 | unsigned int shndx_, unsigned int type_, | |
1617 | bool needs_dynsym_entry_) | |
1618 | : st_value(value_), name(name_), st_size(size_), st_shndx(shndx_), | |
1619 | st_type(type_), output_dynsym_index(0), | |
1620 | needs_dynsym_entry(needs_dynsym_entry_) | |
1621 | { } | |
1622 | // The symbol value. | |
1623 | Address st_value; | |
1624 | // The symbol name. This points to the stringpool entry. | |
1625 | const char* name; | |
1626 | // The symbol size. | |
1627 | unsigned int st_size; | |
1628 | // The output section index. | |
1629 | unsigned int st_shndx : 28; | |
1630 | // The symbol type. | |
1631 | unsigned int st_type : 4; | |
1632 | // The index of the symbol in the output dynamic symbol table. | |
1633 | unsigned int output_dynsym_index : 31; | |
1634 | // TRUE if the symbol needs to appear in the dynamic symbol table. | |
1635 | unsigned int needs_dynsym_entry : 1; | |
1636 | }; | |
1637 | ||
cdc29364 CC |
1638 | // Return TRUE if this is an incremental (unchanged) input file. |
1639 | bool | |
1640 | do_is_incremental() const | |
1641 | { return true; } | |
1642 | ||
1643 | // Return the last modified time of the file. | |
1644 | Timespec | |
1645 | do_get_mtime() | |
1646 | { return this->input_reader_.get_mtime(); } | |
1647 | ||
1648 | // Read the symbols. | |
1649 | void | |
1650 | do_read_symbols(Read_symbols_data*); | |
1651 | ||
1652 | // Lay out the input sections. | |
1653 | void | |
1654 | do_layout(Symbol_table*, Layout*, Read_symbols_data*); | |
1655 | ||
1656 | // Layout sections whose layout was deferred while waiting for | |
1657 | // input files from a plugin. | |
1658 | void | |
1659 | do_layout_deferred_sections(Layout*); | |
1660 | ||
1661 | // Add the symbols to the symbol table. | |
1662 | void | |
1663 | do_add_symbols(Symbol_table*, Read_symbols_data*, Layout*); | |
1664 | ||
1665 | Archive::Should_include | |
1666 | do_should_include_member(Symbol_table* symtab, Layout*, Read_symbols_data*, | |
1667 | std::string* why); | |
1668 | ||
1669 | // Iterate over global symbols, calling a visitor class V for each. | |
1670 | void | |
1671 | do_for_all_global_symbols(Read_symbols_data* sd, | |
1672 | Library_base::Symbol_visitor_base* v); | |
1673 | ||
1674 | // Iterate over local symbols, calling a visitor class V for each GOT offset | |
1675 | // associated with a local symbol. | |
1676 | void | |
1677 | do_for_all_local_got_entries(Got_offset_list::Visitor* v) const; | |
1678 | ||
1679 | // Get the size of a section. | |
1680 | uint64_t | |
1681 | do_section_size(unsigned int shndx); | |
1682 | ||
1683 | // Get the name of a section. | |
1684 | std::string | |
1685 | do_section_name(unsigned int shndx); | |
1686 | ||
1687 | // Return a view of the contents of a section. | |
1688 | Object::Location | |
1689 | do_section_contents(unsigned int shndx); | |
1690 | ||
1691 | // Return section flags. | |
1692 | uint64_t | |
1693 | do_section_flags(unsigned int shndx); | |
1694 | ||
1695 | // Return section entsize. | |
1696 | uint64_t | |
1697 | do_section_entsize(unsigned int shndx); | |
1698 | ||
1699 | // Return section address. | |
1700 | uint64_t | |
1701 | do_section_address(unsigned int shndx); | |
1702 | ||
1703 | // Return section type. | |
1704 | unsigned int | |
1705 | do_section_type(unsigned int shndx); | |
1706 | ||
1707 | // Return the section link field. | |
1708 | unsigned int | |
1709 | do_section_link(unsigned int shndx); | |
1710 | ||
1711 | // Return the section link field. | |
1712 | unsigned int | |
1713 | do_section_info(unsigned int shndx); | |
b961d0d7 | 1714 | |
cdc29364 CC |
1715 | // Return the section alignment. |
1716 | uint64_t | |
1717 | do_section_addralign(unsigned int shndx); | |
1718 | ||
1719 | // Return the Xindex structure to use. | |
1720 | Xindex* | |
1721 | do_initialize_xindex(); | |
1722 | ||
1723 | // Get symbol counts. | |
1724 | void | |
1725 | do_get_global_symbol_counts(const Symbol_table*, size_t*, size_t*) const; | |
1726 | ||
1727 | // Get global symbols. | |
1728 | const Symbols* | |
1729 | do_get_global_symbols() const | |
1730 | { return &this->symbols_; } | |
1731 | ||
1732 | // Return the number of local symbols. | |
1733 | unsigned int | |
1734 | do_local_symbol_count() const | |
f0f9babf CC |
1735 | { return this->local_symbol_count_; } |
1736 | ||
1737 | // Return the number of local symbols in the output symbol table. | |
1738 | unsigned int | |
1739 | do_output_local_symbol_count() const | |
1740 | { return this->local_symbol_count_; } | |
1741 | ||
1742 | // Return the file offset for local symbols in the output symbol table. | |
1743 | off_t | |
1744 | do_local_symbol_offset() const | |
1745 | { return this->local_symbol_offset_; } | |
cdc29364 CC |
1746 | |
1747 | // Read the relocs. | |
1748 | void | |
1749 | do_read_relocs(Read_relocs_data*); | |
1750 | ||
1751 | // Process the relocs to find list of referenced sections. Used only | |
1752 | // during garbage collection. | |
1753 | void | |
1754 | do_gc_process_relocs(Symbol_table*, Layout*, Read_relocs_data*); | |
1755 | ||
1756 | // Scan the relocs and adjust the symbol table. | |
1757 | void | |
1758 | do_scan_relocs(Symbol_table*, Layout*, Read_relocs_data*); | |
1759 | ||
1760 | // Count the local symbols. | |
1761 | void | |
1762 | do_count_local_symbols(Stringpool_template<char>*, | |
1763 | Stringpool_template<char>*); | |
1764 | ||
1765 | // Finalize the local symbols. | |
1766 | unsigned int | |
1767 | do_finalize_local_symbols(unsigned int, off_t, Symbol_table*); | |
1768 | ||
1769 | // Set the offset where local dynamic symbol information will be stored. | |
1770 | unsigned int | |
1771 | do_set_local_dynsym_indexes(unsigned int); | |
1772 | ||
1773 | // Set the offset where local dynamic symbol information will be stored. | |
1774 | unsigned int | |
1775 | do_set_local_dynsym_offset(off_t); | |
1776 | ||
1777 | // Relocate the input sections and write out the local symbols. | |
1778 | void | |
1779 | do_relocate(const Symbol_table* symtab, const Layout*, Output_file* of); | |
1780 | ||
1781 | // Set the offset of a section. | |
1782 | void | |
1783 | do_set_section_offset(unsigned int shndx, uint64_t off); | |
1784 | ||
1785 | // The Incremental_binary base file. | |
1786 | Sized_incremental_binary<size, big_endian>* ibase_; | |
1787 | // The index of the object in the input file list. | |
1788 | unsigned int input_file_index_; | |
1789 | // The reader for the input file. | |
1790 | Input_entry_reader input_reader_; | |
f0f9babf CC |
1791 | // The number of local symbols. |
1792 | unsigned int local_symbol_count_; | |
1793 | // The number of local symbols which go into the output file's dynamic | |
1794 | // symbol table. | |
1795 | unsigned int output_local_dynsym_count_; | |
1796 | // This starting symbol index in the output symbol table. | |
1797 | unsigned int local_symbol_index_; | |
1798 | // The file offset for local symbols in the output symbol table. | |
1799 | unsigned int local_symbol_offset_; | |
1800 | // The file offset for local symbols in the output symbol table. | |
1801 | unsigned int local_dynsym_offset_; | |
cdc29364 CC |
1802 | // The entries in the symbol table for the external symbols. |
1803 | Symbols symbols_; | |
1804 | // For each input section, the offset of the input section in its | |
1805 | // output section. This is INVALID_ADDRESS if the input section requires a | |
1806 | // special mapping. | |
1807 | std::vector<Address> section_offsets_; | |
1808 | // The offset of the first incremental relocation for this object. | |
1809 | unsigned int incr_reloc_offset_; | |
1810 | // The number of incremental relocations for this object. | |
1811 | unsigned int incr_reloc_count_; | |
1812 | // The index of the first incremental relocation for this object in the | |
1813 | // updated output file. | |
1814 | unsigned int incr_reloc_output_index_; | |
1815 | // A copy of the incremental relocations from this object. | |
1816 | unsigned char* incr_relocs_; | |
f0f9babf CC |
1817 | // The local symbols. |
1818 | std::vector<Local_symbol> local_symbols_; | |
cdc29364 CC |
1819 | }; |
1820 | ||
1821 | // An incremental Dynobj. This class represents a shared object that has | |
1822 | // not changed since the last incremental link, and whose contents can be | |
1823 | // used directly from the base file. | |
1824 | ||
1825 | template<int size, bool big_endian> | |
1826 | class Sized_incr_dynobj : public Dynobj | |
1827 | { | |
1828 | public: | |
1829 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
1830 | ||
1831 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
1832 | ||
1833 | Sized_incr_dynobj(const std::string& name, | |
1834 | Sized_incremental_binary<size, big_endian>* ibase, | |
1835 | unsigned int input_file_index); | |
1836 | ||
1837 | private: | |
1838 | typedef Incremental_inputs_reader<size, big_endian> Inputs_reader; | |
1839 | typedef typename Inputs_reader::Incremental_input_entry_reader | |
1840 | Input_entry_reader; | |
1841 | ||
1842 | // Return TRUE if this is an incremental (unchanged) input file. | |
1843 | bool | |
1844 | do_is_incremental() const | |
1845 | { return true; } | |
1846 | ||
1847 | // Return the last modified time of the file. | |
1848 | Timespec | |
1849 | do_get_mtime() | |
1850 | { return this->input_reader_.get_mtime(); } | |
1851 | ||
1852 | // Read the symbols. | |
1853 | void | |
1854 | do_read_symbols(Read_symbols_data*); | |
1855 | ||
1856 | // Lay out the input sections. | |
1857 | void | |
1858 | do_layout(Symbol_table*, Layout*, Read_symbols_data*); | |
1859 | ||
1860 | // Add the symbols to the symbol table. | |
1861 | void | |
1862 | do_add_symbols(Symbol_table*, Read_symbols_data*, Layout*); | |
1863 | ||
1864 | Archive::Should_include | |
1865 | do_should_include_member(Symbol_table* symtab, Layout*, Read_symbols_data*, | |
1866 | std::string* why); | |
1867 | ||
1868 | // Iterate over global symbols, calling a visitor class V for each. | |
1869 | void | |
1870 | do_for_all_global_symbols(Read_symbols_data* sd, | |
1871 | Library_base::Symbol_visitor_base* v); | |
1872 | ||
1873 | // Iterate over local symbols, calling a visitor class V for each GOT offset | |
1874 | // associated with a local symbol. | |
1875 | void | |
1876 | do_for_all_local_got_entries(Got_offset_list::Visitor* v) const; | |
1877 | ||
1878 | // Get the size of a section. | |
1879 | uint64_t | |
1880 | do_section_size(unsigned int shndx); | |
1881 | ||
1882 | // Get the name of a section. | |
1883 | std::string | |
1884 | do_section_name(unsigned int shndx); | |
1885 | ||
1886 | // Return a view of the contents of a section. | |
1887 | Object::Location | |
1888 | do_section_contents(unsigned int shndx); | |
1889 | ||
1890 | // Return section flags. | |
1891 | uint64_t | |
1892 | do_section_flags(unsigned int shndx); | |
1893 | ||
1894 | // Return section entsize. | |
1895 | uint64_t | |
1896 | do_section_entsize(unsigned int shndx); | |
1897 | ||
1898 | // Return section address. | |
1899 | uint64_t | |
1900 | do_section_address(unsigned int shndx); | |
1901 | ||
1902 | // Return section type. | |
1903 | unsigned int | |
1904 | do_section_type(unsigned int shndx); | |
1905 | ||
1906 | // Return the section link field. | |
1907 | unsigned int | |
1908 | do_section_link(unsigned int shndx); | |
1909 | ||
1910 | // Return the section link field. | |
1911 | unsigned int | |
1912 | do_section_info(unsigned int shndx); | |
1913 | ||
1914 | // Return the section alignment. | |
1915 | uint64_t | |
1916 | do_section_addralign(unsigned int shndx); | |
1917 | ||
1918 | // Return the Xindex structure to use. | |
1919 | Xindex* | |
1920 | do_initialize_xindex(); | |
1921 | ||
1922 | // Get symbol counts. | |
1923 | void | |
1924 | do_get_global_symbol_counts(const Symbol_table*, size_t*, size_t*) const; | |
1925 | ||
1926 | // Get global symbols. | |
1927 | const Symbols* | |
1928 | do_get_global_symbols() const | |
1929 | { return &this->symbols_; } | |
1930 | ||
1931 | // The Incremental_binary base file. | |
1932 | Sized_incremental_binary<size, big_endian>* ibase_; | |
1933 | // The index of the object in the input file list. | |
1934 | unsigned int input_file_index_; | |
1935 | // The reader for the input file. | |
1936 | Input_entry_reader input_reader_; | |
1937 | // The entries in the symbol table for the external symbols. | |
1938 | Symbols symbols_; | |
1939 | }; | |
1940 | ||
1941 | // Allocate an incremental object of the appropriate size and endianness. | |
1942 | extern Object* | |
1943 | make_sized_incremental_object( | |
1944 | Incremental_binary* base, | |
1945 | unsigned int input_file_index, | |
1946 | Incremental_input_type input_type, | |
1947 | const Incremental_binary::Input_reader* input_reader); | |
1948 | ||
1949 | // This class represents an Archive library (or --start-lib/--end-lib group) | |
1950 | // that has not changed since the last incremental link. Its contents come | |
1951 | // from the incremental inputs entry in the base file. | |
1952 | ||
1953 | class Incremental_library : public Library_base | |
1954 | { | |
1955 | public: | |
1956 | Incremental_library(const char* filename, unsigned int input_file_index, | |
1957 | const Incremental_binary::Input_reader* input_reader) | |
1958 | : Library_base(NULL), filename_(filename), | |
1959 | input_file_index_(input_file_index), input_reader_(input_reader), | |
1960 | unused_symbols_(), is_reported_(false) | |
1961 | { } | |
1962 | ||
1963 | // Return the input file index. | |
1964 | unsigned int | |
1965 | input_file_index() const | |
1966 | { return this->input_file_index_; } | |
1967 | ||
1968 | // Return the serial number of the input file. | |
1969 | unsigned int | |
1970 | arg_serial() const | |
1971 | { return this->input_reader_->arg_serial(); } | |
1972 | ||
1973 | // Copy the unused symbols from the incremental input info. | |
1974 | // We need to do this because we may be overwriting the incremental | |
1975 | // input info in the base file before we write the new incremental | |
1976 | // info. | |
1977 | void | |
1978 | copy_unused_symbols(); | |
1979 | ||
1980 | // Return FALSE on the first call to indicate that the library needs | |
1981 | // to be recorded; return TRUE subsequently. | |
1982 | bool | |
1983 | is_reported() | |
1984 | { | |
1985 | bool was_reported = this->is_reported_; | |
1986 | is_reported_ = true; | |
1987 | return was_reported; | |
1988 | } | |
1989 | ||
1990 | private: | |
1991 | typedef std::vector<std::string> Symbol_list; | |
1992 | ||
1993 | // The file name. | |
1994 | const std::string& | |
1995 | do_filename() const | |
1996 | { return this->filename_; } | |
1997 | ||
1998 | // Return the modification time of the archive file. | |
1999 | Timespec | |
2000 | do_get_mtime() | |
2001 | { return this->input_reader_->get_mtime(); } | |
2002 | ||
2003 | // Iterator for unused global symbols in the library. | |
2004 | void | |
2005 | do_for_all_unused_symbols(Symbol_visitor_base* v) const; | |
2006 | ||
2007 | // The name of the library. | |
2008 | std::string filename_; | |
2009 | // The input file index of this library. | |
2010 | unsigned int input_file_index_; | |
2011 | // A reader for the incremental input information. | |
2012 | const Incremental_binary::Input_reader* input_reader_; | |
2013 | // List of unused symbols defined in this library. | |
2014 | Symbol_list unused_symbols_; | |
2015 | // TRUE when this library has been reported to the new incremental info. | |
2016 | bool is_reported_; | |
b961d0d7 CC |
2017 | }; |
2018 | ||
3ce2c28e ILT |
2019 | } // End namespace gold. |
2020 | ||
2021 | #endif // !defined(GOLD_INCREMENTAL_H) |