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