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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; | |
0f1c85a6 | 43 | class Incremental_dynobj_entry; |
09ec0418 CC |
44 | class Incremental_archive_entry; |
45 | class Incremental_inputs; | |
b961d0d7 | 46 | class Incremental_binary; |
cdc29364 | 47 | class Incremental_library; |
3ce2c28e | 48 | class Object; |
cdc29364 | 49 | class Script_info; |
3ce2c28e | 50 | |
072fe7ce ILT |
51 | // Incremental input type as stored in .gnu_incremental_inputs. |
52 | ||
53 | enum Incremental_input_type | |
54 | { | |
072fe7ce | 55 | INCREMENTAL_INPUT_OBJECT = 1, |
09ec0418 CC |
56 | INCREMENTAL_INPUT_ARCHIVE_MEMBER = 2, |
57 | INCREMENTAL_INPUT_ARCHIVE = 3, | |
58 | INCREMENTAL_INPUT_SHARED_LIBRARY = 4, | |
59 | INCREMENTAL_INPUT_SCRIPT = 5 | |
ca55d848 RÁE |
60 | }; |
61 | ||
cdc29364 CC |
62 | // Incremental input file flags. |
63 | // The input file type is stored in the lower eight bits. | |
64 | ||
65 | enum Incremental_input_flags | |
66 | { | |
0f1c85a6 CC |
67 | INCREMENTAL_INPUT_IN_SYSTEM_DIR = 0x8000, |
68 | INCREMENTAL_INPUT_AS_NEEDED = 0x4000 | |
cdc29364 CC |
69 | }; |
70 | ||
c549a694 ILT |
71 | // Create an Incremental_binary object for FILE. Returns NULL is this is not |
72 | // possible, e.g. FILE is not an ELF file or has an unsupported target. | |
09ec0418 | 73 | |
c549a694 ILT |
74 | Incremental_binary* |
75 | open_incremental_binary(Output_file* file); | |
76 | ||
09ec0418 CC |
77 | // Base class for recording each input file. |
78 | ||
79 | class Incremental_input_entry | |
80 | { | |
81 | public: | |
cdc29364 CC |
82 | Incremental_input_entry(Stringpool::Key filename_key, unsigned int arg_serial, |
83 | Timespec mtime) | |
4829d394 | 84 | : filename_key_(filename_key), file_index_(0), offset_(0), info_offset_(0), |
0f1c85a6 CC |
85 | arg_serial_(arg_serial), mtime_(mtime), is_in_system_directory_(false), |
86 | as_needed_(false) | |
09ec0418 CC |
87 | { } |
88 | ||
b56648ad ILT |
89 | virtual |
90 | ~Incremental_input_entry() | |
91 | { } | |
92 | ||
09ec0418 CC |
93 | // Return the type of input file. |
94 | Incremental_input_type | |
95 | type() const | |
96 | { return this->do_type(); } | |
97 | ||
4829d394 | 98 | // Set the index and section offset of this input file entry. |
09ec0418 | 99 | void |
4829d394 CC |
100 | set_offset(unsigned int file_index, unsigned int offset) |
101 | { | |
102 | this->file_index_ = file_index; | |
103 | this->offset_ = offset; | |
104 | } | |
09ec0418 CC |
105 | |
106 | // Set the section offset of the supplemental information for this entry. | |
107 | void | |
108 | set_info_offset(unsigned int info_offset) | |
109 | { this->info_offset_ = info_offset; } | |
110 | ||
4829d394 CC |
111 | // Get the index of this input file entry. |
112 | unsigned int | |
113 | get_file_index() const | |
114 | { return this->file_index_; } | |
115 | ||
09ec0418 CC |
116 | // Get the section offset of this input file entry. |
117 | unsigned int | |
118 | get_offset() const | |
119 | { return this->offset_; } | |
120 | ||
121 | // Get the section offset of the supplemental information for this entry. | |
122 | unsigned int | |
123 | get_info_offset() const | |
124 | { return this->info_offset_; } | |
125 | ||
126 | // Get the stringpool key for the input filename. | |
127 | Stringpool::Key | |
128 | get_filename_key() const | |
129 | { return this->filename_key_; } | |
130 | ||
cdc29364 CC |
131 | // Get the serial number of the input file. |
132 | unsigned int | |
133 | arg_serial() const | |
134 | { return this->arg_serial_; } | |
135 | ||
09ec0418 CC |
136 | // Get the modification time of the input file. |
137 | const Timespec& | |
138 | get_mtime() const | |
139 | { return this->mtime_; } | |
140 | ||
cdc29364 CC |
141 | // Record that the file was found in a system directory. |
142 | void | |
143 | set_is_in_system_directory() | |
144 | { this->is_in_system_directory_ = true; } | |
145 | ||
146 | // Return TRUE if the file was found in a system directory. | |
147 | bool | |
148 | is_in_system_directory() const | |
149 | { return this->is_in_system_directory_; } | |
150 | ||
0f1c85a6 CC |
151 | // Record that the file was linked with --as-needed. |
152 | void | |
153 | set_as_needed() | |
154 | { this->as_needed_ = true; } | |
155 | ||
156 | // Return TRUE if the file was linked with --as-needed. | |
157 | bool | |
158 | as_needed() const | |
159 | { return this->as_needed_; } | |
160 | ||
09ec0418 CC |
161 | // Return a pointer to the derived Incremental_script_entry object. |
162 | // Return NULL for input entries that are not script files. | |
163 | Incremental_script_entry* | |
164 | script_entry() | |
165 | { return this->do_script_entry(); } | |
166 | ||
167 | // Return a pointer to the derived Incremental_object_entry object. | |
168 | // Return NULL for input entries that are not object files. | |
169 | Incremental_object_entry* | |
170 | object_entry() | |
171 | { return this->do_object_entry(); } | |
172 | ||
0f1c85a6 CC |
173 | // Return a pointer to the derived Incremental_dynobj_entry object. |
174 | // Return NULL for input entries that are not shared object files. | |
175 | Incremental_dynobj_entry* | |
176 | dynobj_entry() | |
177 | { return this->do_dynobj_entry(); } | |
178 | ||
09ec0418 CC |
179 | // Return a pointer to the derived Incremental_archive_entry object. |
180 | // Return NULL for input entries that are not archive files. | |
181 | Incremental_archive_entry* | |
182 | archive_entry() | |
183 | { return this->do_archive_entry(); } | |
184 | ||
185 | protected: | |
186 | // Return the type of input file. | |
187 | virtual Incremental_input_type | |
188 | do_type() const = 0; | |
189 | ||
190 | // Return a pointer to the derived Incremental_script_entry object. | |
191 | // Return NULL for input entries that are not script files. | |
192 | virtual Incremental_script_entry* | |
193 | do_script_entry() | |
194 | { return NULL; } | |
195 | ||
196 | // Return a pointer to the derived Incremental_object_entry object. | |
197 | // Return NULL for input entries that are not object files. | |
198 | virtual Incremental_object_entry* | |
199 | do_object_entry() | |
200 | { return NULL; } | |
201 | ||
0f1c85a6 CC |
202 | // Return a pointer to the derived Incremental_dynobj_entry object. |
203 | // Return NULL for input entries that are not shared object files. | |
204 | virtual Incremental_dynobj_entry* | |
205 | do_dynobj_entry() | |
206 | { return NULL; } | |
207 | ||
09ec0418 CC |
208 | // Return a pointer to the derived Incremental_archive_entry object. |
209 | // Return NULL for input entries that are not archive files. | |
210 | virtual Incremental_archive_entry* | |
211 | do_archive_entry() | |
212 | { return NULL; } | |
213 | ||
214 | private: | |
215 | // Key of the filename string in the section stringtable. | |
216 | Stringpool::Key filename_key_; | |
217 | ||
4829d394 CC |
218 | // Index of the entry in the output section. |
219 | unsigned int file_index_; | |
220 | ||
09ec0418 CC |
221 | // Offset of the entry in the output section. |
222 | unsigned int offset_; | |
223 | ||
224 | // Offset of the extra information in the output section. | |
225 | unsigned int info_offset_; | |
226 | ||
cdc29364 CC |
227 | // Serial number of the file in the argument list. |
228 | unsigned int arg_serial_; | |
229 | ||
09ec0418 CC |
230 | // Last modification time of the file. |
231 | Timespec mtime_; | |
cdc29364 CC |
232 | |
233 | // TRUE if the file was found in a system directory. | |
234 | bool is_in_system_directory_; | |
0f1c85a6 CC |
235 | |
236 | // TRUE if the file was linked with --as-needed. | |
237 | bool as_needed_; | |
cdc29364 CC |
238 | }; |
239 | ||
240 | // Information about a script input that will persist during the whole linker | |
241 | // run. Needed only during an incremental build to retrieve the input files | |
242 | // added by this script. | |
243 | ||
244 | class Script_info | |
245 | { | |
246 | public: | |
247 | Script_info(const std::string& filename) | |
248 | : filename_(filename), incremental_script_entry_(NULL) | |
249 | { } | |
250 | ||
251 | // Store a pointer to the incremental information for this script. | |
252 | void | |
253 | set_incremental_info(Incremental_script_entry* entry) | |
254 | { this->incremental_script_entry_ = entry; } | |
255 | ||
256 | // Return the filename. | |
257 | const std::string& | |
258 | filename() const | |
259 | { return this->filename_; } | |
260 | ||
261 | // Return the pointer to the incremental information for this script. | |
262 | Incremental_script_entry* | |
263 | incremental_info() const | |
264 | { return this->incremental_script_entry_; } | |
265 | ||
266 | private: | |
267 | const std::string filename_; | |
268 | Incremental_script_entry* incremental_script_entry_; | |
09ec0418 CC |
269 | }; |
270 | ||
271 | // Class for recording input scripts. | |
272 | ||
273 | class Incremental_script_entry : public Incremental_input_entry | |
274 | { | |
275 | public: | |
cdc29364 CC |
276 | Incremental_script_entry(Stringpool::Key filename_key, |
277 | unsigned int arg_serial, Script_info* script, | |
09ec0418 | 278 | Timespec mtime) |
cdc29364 CC |
279 | : Incremental_input_entry(filename_key, arg_serial, mtime), |
280 | script_(script), objects_() | |
09ec0418 CC |
281 | { } |
282 | ||
c7975edd CC |
283 | // Add a member object to the archive. |
284 | void | |
285 | add_object(Incremental_input_entry* obj_entry) | |
286 | { | |
287 | this->objects_.push_back(obj_entry); | |
288 | } | |
289 | ||
290 | // Return the number of objects included by this script. | |
291 | unsigned int | |
292 | get_object_count() | |
293 | { return this->objects_.size(); } | |
294 | ||
295 | // Return the Nth object. | |
296 | Incremental_input_entry* | |
297 | get_object(unsigned int n) | |
298 | { | |
299 | gold_assert(n < this->objects_.size()); | |
300 | return this->objects_[n]; | |
301 | } | |
302 | ||
09ec0418 CC |
303 | protected: |
304 | virtual Incremental_input_type | |
305 | do_type() const | |
306 | { return INCREMENTAL_INPUT_SCRIPT; } | |
307 | ||
308 | // Return a pointer to the derived Incremental_script_entry object. | |
309 | virtual Incremental_script_entry* | |
310 | do_script_entry() | |
311 | { return this; } | |
312 | ||
313 | private: | |
314 | // Information about the script file. | |
315 | Script_info* script_; | |
c7975edd CC |
316 | // Objects that have been included by this script. |
317 | std::vector<Incremental_input_entry*> objects_; | |
09ec0418 CC |
318 | }; |
319 | ||
320 | // Class for recording input object files. | |
321 | ||
322 | class Incremental_object_entry : public Incremental_input_entry | |
323 | { | |
324 | public: | |
325 | Incremental_object_entry(Stringpool::Key filename_key, Object* obj, | |
cdc29364 CC |
326 | unsigned int arg_serial, Timespec mtime) |
327 | : Incremental_input_entry(filename_key, arg_serial, mtime), obj_(obj), | |
89d8a36b | 328 | is_member_(false), sections_(), groups_() |
0f1c85a6 | 329 | { this->sections_.reserve(obj->shnum()); } |
09ec0418 CC |
330 | |
331 | // Get the object. | |
332 | Object* | |
333 | object() const | |
334 | { return this->obj_; } | |
335 | ||
336 | // Record that this object is an archive member. | |
337 | void | |
338 | set_is_member() | |
339 | { this->is_member_ = true; } | |
340 | ||
341 | // Return true if this object is an archive member. | |
342 | bool | |
343 | is_member() const | |
344 | { return this->is_member_; } | |
345 | ||
346 | // Add an input section. | |
347 | void | |
348 | add_input_section(unsigned int shndx, Stringpool::Key name_key, off_t sh_size) | |
cdc29364 | 349 | { this->sections_.push_back(Input_section(shndx, name_key, sh_size)); } |
09ec0418 CC |
350 | |
351 | // Return the number of input sections in this object. | |
352 | unsigned int | |
353 | get_input_section_count() const | |
354 | { return this->sections_.size(); } | |
355 | ||
cdc29364 CC |
356 | // Return the input section index for the Nth input section. |
357 | Stringpool::Key | |
358 | get_input_section_index(unsigned int n) const | |
359 | { return this->sections_[n].shndx_; } | |
360 | ||
09ec0418 CC |
361 | // Return the stringpool key of the Nth input section. |
362 | Stringpool::Key | |
363 | get_input_section_name_key(unsigned int n) const | |
cdc29364 | 364 | { return this->sections_[n].name_key_; } |
09ec0418 CC |
365 | |
366 | // Return the size of the Nth input section. | |
367 | off_t | |
368 | get_input_section_size(unsigned int n) const | |
cdc29364 | 369 | { return this->sections_[n].sh_size_; } |
09ec0418 | 370 | |
89d8a36b CC |
371 | // Add a kept COMDAT group. |
372 | void | |
373 | add_comdat_group(Stringpool::Key signature_key) | |
374 | { this->groups_.push_back(signature_key); } | |
375 | ||
376 | // Return the number of COMDAT groups. | |
377 | unsigned int | |
378 | get_comdat_group_count() const | |
379 | { return this->groups_.size(); } | |
380 | ||
381 | // Return the stringpool key for the signature of the Nth comdat group. | |
382 | Stringpool::Key | |
383 | get_comdat_signature_key(unsigned int n) const | |
384 | { return this->groups_[n]; } | |
385 | ||
09ec0418 CC |
386 | protected: |
387 | virtual Incremental_input_type | |
388 | do_type() const | |
389 | { | |
390 | return (this->is_member_ | |
391 | ? INCREMENTAL_INPUT_ARCHIVE_MEMBER | |
0f1c85a6 | 392 | : INCREMENTAL_INPUT_OBJECT); |
09ec0418 CC |
393 | } |
394 | ||
395 | // Return a pointer to the derived Incremental_object_entry object. | |
396 | virtual Incremental_object_entry* | |
397 | do_object_entry() | |
398 | { return this; } | |
399 | ||
400 | private: | |
401 | // The object file itself. | |
402 | Object* obj_; | |
403 | ||
404 | // Whether this object is an archive member. | |
405 | bool is_member_; | |
406 | ||
407 | // Input sections. | |
408 | struct Input_section | |
409 | { | |
cdc29364 CC |
410 | Input_section(unsigned int shndx, Stringpool::Key name_key, off_t sh_size) |
411 | : shndx_(shndx), name_key_(name_key), sh_size_(sh_size) | |
412 | { } | |
413 | unsigned int shndx_; | |
414 | Stringpool::Key name_key_; | |
415 | off_t sh_size_; | |
09ec0418 CC |
416 | }; |
417 | std::vector<Input_section> sections_; | |
89d8a36b CC |
418 | |
419 | // COMDAT groups. | |
420 | std::vector<Stringpool::Key> groups_; | |
09ec0418 CC |
421 | }; |
422 | ||
0f1c85a6 CC |
423 | // Class for recording shared library input files. |
424 | ||
425 | class Incremental_dynobj_entry : public Incremental_input_entry | |
426 | { | |
427 | public: | |
428 | Incremental_dynobj_entry(Stringpool::Key filename_key, | |
429 | Stringpool::Key soname_key, Object* obj, | |
430 | unsigned int arg_serial, Timespec mtime) | |
431 | : Incremental_input_entry(filename_key, arg_serial, mtime), | |
432 | soname_key_(soname_key), obj_(obj) | |
433 | { } | |
434 | ||
435 | // Get the object. | |
436 | Object* | |
437 | object() const | |
438 | { return this->obj_; } | |
439 | ||
440 | // Get the stringpool key for the soname. | |
441 | Stringpool::Key | |
442 | get_soname_key() const | |
443 | { return this->soname_key_; } | |
444 | ||
445 | protected: | |
446 | virtual Incremental_input_type | |
447 | do_type() const | |
448 | { return INCREMENTAL_INPUT_SHARED_LIBRARY; } | |
449 | ||
450 | // Return a pointer to the derived Incremental_dynobj_entry object. | |
451 | virtual Incremental_dynobj_entry* | |
452 | do_dynobj_entry() | |
453 | { return this; } | |
454 | ||
455 | private: | |
456 | // Key of the soname string in the section stringtable. | |
457 | Stringpool::Key soname_key_; | |
458 | ||
459 | // The object file itself. | |
460 | Object* obj_; | |
461 | }; | |
462 | ||
09ec0418 CC |
463 | // Class for recording archive library input files. |
464 | ||
465 | class Incremental_archive_entry : public Incremental_input_entry | |
466 | { | |
467 | public: | |
cdc29364 CC |
468 | Incremental_archive_entry(Stringpool::Key filename_key, |
469 | unsigned int arg_serial, Timespec mtime) | |
470 | : Incremental_input_entry(filename_key, arg_serial, mtime), members_(), | |
471 | unused_syms_() | |
09ec0418 CC |
472 | { } |
473 | ||
474 | // Add a member object to the archive. | |
475 | void | |
476 | add_object(Incremental_object_entry* obj_entry) | |
477 | { | |
478 | this->members_.push_back(obj_entry); | |
479 | obj_entry->set_is_member(); | |
480 | } | |
481 | ||
482 | // Add an unused global symbol to the archive. | |
483 | void | |
484 | add_unused_global_symbol(Stringpool::Key symbol_key) | |
485 | { this->unused_syms_.push_back(symbol_key); } | |
486 | ||
487 | // Return the number of member objects included in the link. | |
488 | unsigned int | |
489 | get_member_count() | |
490 | { return this->members_.size(); } | |
491 | ||
492 | // Return the Nth member object. | |
493 | Incremental_object_entry* | |
494 | get_member(unsigned int n) | |
495 | { return this->members_[n]; } | |
496 | ||
497 | // Return the number of unused global symbols in this archive. | |
498 | unsigned int | |
499 | get_unused_global_symbol_count() | |
500 | { return this->unused_syms_.size(); } | |
501 | ||
502 | // Return the Nth unused global symbol. | |
503 | Stringpool::Key | |
504 | get_unused_global_symbol(unsigned int n) | |
505 | { return this->unused_syms_[n]; } | |
506 | ||
507 | protected: | |
508 | virtual Incremental_input_type | |
509 | do_type() const | |
510 | { return INCREMENTAL_INPUT_ARCHIVE; } | |
511 | ||
512 | // Return a pointer to the derived Incremental_archive_entry object. | |
513 | virtual Incremental_archive_entry* | |
514 | do_archive_entry() | |
515 | { return this; } | |
516 | ||
517 | private: | |
518 | // Members of the archive that have been included in the link. | |
519 | std::vector<Incremental_object_entry*> members_; | |
520 | ||
521 | // Unused global symbols from this archive. | |
522 | std::vector<Stringpool::Key> unused_syms_; | |
523 | }; | |
524 | ||
3ce2c28e ILT |
525 | // This class contains the information needed during an incremental |
526 | // build about the inputs necessary to build the .gnu_incremental_inputs. | |
09ec0418 | 527 | |
3ce2c28e ILT |
528 | class Incremental_inputs |
529 | { | |
530 | public: | |
09ec0418 CC |
531 | typedef std::vector<Incremental_input_entry*> Input_list; |
532 | ||
3ce2c28e | 533 | Incremental_inputs() |
09ec0418 CC |
534 | : inputs_(), command_line_(), command_line_key_(0), |
535 | strtab_(new Stringpool()), current_object_(NULL), | |
536 | current_object_entry_(NULL), inputs_section_(NULL), | |
537 | symtab_section_(NULL), relocs_section_(NULL), | |
538 | reloc_count_(0) | |
3ce2c28e | 539 | { } |
09ec0418 | 540 | |
3ce2c28e ILT |
541 | ~Incremental_inputs() { delete this->strtab_; } |
542 | ||
543 | // Record the command line. | |
544 | void | |
545 | report_command_line(int argc, const char* const* argv); | |
072fe7ce | 546 | |
09ec0418 CC |
547 | // Record the initial info for archive file ARCHIVE. |
548 | void | |
cdc29364 CC |
549 | report_archive_begin(Library_base* arch, unsigned int arg_serial, |
550 | Script_info* script_info); | |
09ec0418 CC |
551 | |
552 | // Record the final info for archive file ARCHIVE. | |
553 | void | |
e0c52780 | 554 | report_archive_end(Library_base* arch); |
09ec0418 CC |
555 | |
556 | // Record the info for object file OBJ. If ARCH is not NULL, | |
557 | // attach the object file to the archive. | |
072fe7ce | 558 | void |
cdc29364 CC |
559 | report_object(Object* obj, unsigned int arg_serial, Library_base* arch, |
560 | Script_info* script_info); | |
072fe7ce | 561 | |
09ec0418 | 562 | // Record an input section belonging to object file OBJ. |
072fe7ce | 563 | void |
09ec0418 CC |
564 | report_input_section(Object* obj, unsigned int shndx, const char* name, |
565 | off_t sh_size); | |
072fe7ce | 566 | |
89d8a36b CC |
567 | // Record a kept COMDAT group belonging to object file OBJ. |
568 | void | |
569 | report_comdat_group(Object* obj, const char* name); | |
570 | ||
09ec0418 | 571 | // Record the info for input script SCRIPT. |
072fe7ce | 572 | void |
cdc29364 | 573 | report_script(Script_info* script, unsigned int arg_serial, |
09ec0418 CC |
574 | Timespec mtime); |
575 | ||
576 | // Return the running count of incremental relocations. | |
577 | unsigned int | |
578 | get_reloc_count() const | |
579 | { return this->reloc_count_; } | |
072fe7ce | 580 | |
09ec0418 | 581 | // Update the running count of incremental relocations. |
072fe7ce | 582 | void |
09ec0418 CC |
583 | set_reloc_count(unsigned int count) |
584 | { this->reloc_count_ = count; } | |
072fe7ce | 585 | |
3ce2c28e ILT |
586 | // Prepare for layout. Called from Layout::finalize. |
587 | void | |
588 | finalize(); | |
589 | ||
09ec0418 CC |
590 | // Create the .gnu_incremental_inputs and related sections. |
591 | void | |
592 | create_data_sections(Symbol_table* symtab); | |
593 | ||
594 | // Return the .gnu_incremental_inputs section. | |
3ce2c28e | 595 | Output_section_data* |
09ec0418 CC |
596 | inputs_section() const |
597 | { return this->inputs_section_; } | |
598 | ||
599 | // Return the .gnu_incremental_symtab section. | |
600 | Output_data_space* | |
601 | symtab_section() const | |
602 | { return this->symtab_section_; } | |
603 | ||
604 | // Return the .gnu_incremental_relocs section. | |
605 | Output_data_space* | |
606 | relocs_section() const | |
607 | { return this->relocs_section_; } | |
072fe7ce | 608 | |
0e70b911 CC |
609 | // Return the .gnu_incremental_got_plt section. |
610 | Output_data_space* | |
611 | got_plt_section() const | |
612 | { return this->got_plt_section_; } | |
613 | ||
072fe7ce | 614 | // Return the .gnu_incremental_strtab stringpool. |
3ce2c28e | 615 | Stringpool* |
09ec0418 | 616 | get_stringpool() const |
3ce2c28e ILT |
617 | { return this->strtab_; } |
618 | ||
c4aa1e2d ILT |
619 | // Return the canonical form of the command line, as will be stored in |
620 | // .gnu_incremental_strtab. | |
621 | const std::string& | |
09ec0418 | 622 | command_line() const |
c4aa1e2d ILT |
623 | { return this->command_line_; } |
624 | ||
09ec0418 CC |
625 | // Return the stringpool key of the command line. |
626 | Stringpool::Key | |
627 | command_line_key() const | |
628 | { return this->command_line_key_; } | |
629 | ||
630 | // Return the number of input files. | |
631 | int | |
632 | input_file_count() const | |
633 | { return this->inputs_.size(); } | |
634 | ||
635 | // Return the input files. | |
636 | const Input_list& | |
637 | input_files() const | |
c4aa1e2d ILT |
638 | { return this->inputs_; } |
639 | ||
09ec0418 CC |
640 | // Return the sh_entsize value for the .gnu_incremental_relocs section. |
641 | unsigned int | |
642 | relocs_entsize() const; | |
643 | ||
3ce2c28e | 644 | private: |
09ec0418 CC |
645 | // The list of input files. |
646 | Input_list inputs_; | |
072fe7ce | 647 | |
09ec0418 CC |
648 | // Canonical form of the command line, as will be stored in |
649 | // .gnu_incremental_strtab. | |
650 | std::string command_line_; | |
072fe7ce | 651 | |
09ec0418 CC |
652 | // The key of the command line string in the string pool. |
653 | Stringpool::Key command_line_key_; | |
654 | ||
655 | // The .gnu_incremental_strtab string pool associated with the | |
656 | // .gnu_incremental_inputs. | |
657 | Stringpool* strtab_; | |
658 | ||
659 | // Keep track of the object currently being processed. | |
660 | Object* current_object_; | |
661 | Incremental_object_entry* current_object_entry_; | |
662 | ||
663 | // The .gnu_incremental_inputs section. | |
664 | Output_section_data* inputs_section_; | |
072fe7ce | 665 | |
09ec0418 CC |
666 | // The .gnu_incremental_symtab section. |
667 | Output_data_space* symtab_section_; | |
668 | ||
669 | // The .gnu_incremental_relocs section. | |
670 | Output_data_space* relocs_section_; | |
671 | ||
0e70b911 CC |
672 | // The .gnu_incremental_got_plt section. |
673 | Output_data_space* got_plt_section_; | |
674 | ||
09ec0418 CC |
675 | // Total count of incremental relocations. Updated during Scan_relocs |
676 | // phase at the completion of each object file. | |
677 | unsigned int reloc_count_; | |
678 | }; | |
679 | ||
cdc29364 CC |
680 | // Reader class for global symbol info from an object file entry in |
681 | // the .gnu_incremental_inputs section. | |
682 | ||
683 | template<bool big_endian> | |
684 | class Incremental_global_symbol_reader | |
685 | { | |
686 | private: | |
687 | typedef elfcpp::Swap<32, big_endian> Swap32; | |
688 | ||
689 | public: | |
690 | Incremental_global_symbol_reader(const unsigned char* p) | |
691 | : p_(p) | |
692 | { } | |
693 | ||
694 | unsigned int | |
695 | output_symndx() const | |
696 | { return Swap32::readval(this->p_); } | |
697 | ||
698 | unsigned int | |
699 | shndx() const | |
700 | { return Swap32::readval(this->p_ + 4); } | |
701 | ||
702 | unsigned int | |
703 | next_offset() const | |
704 | { return Swap32::readval(this->p_ + 8); } | |
705 | ||
706 | unsigned int | |
707 | reloc_count() const | |
708 | { return Swap32::readval(this->p_ + 12); } | |
709 | ||
710 | unsigned int | |
711 | reloc_offset() const | |
712 | { return Swap32::readval(this->p_ + 16); } | |
713 | ||
714 | private: | |
715 | // Base address of the symbol entry. | |
716 | const unsigned char* p_; | |
717 | }; | |
718 | ||
09ec0418 CC |
719 | // Reader class for .gnu_incremental_inputs section. |
720 | ||
721 | template<int size, bool big_endian> | |
722 | class Incremental_inputs_reader | |
723 | { | |
724 | private: | |
725 | typedef elfcpp::Swap<size, big_endian> Swap; | |
726 | typedef elfcpp::Swap<16, big_endian> Swap16; | |
727 | typedef elfcpp::Swap<32, big_endian> Swap32; | |
728 | typedef elfcpp::Swap<64, big_endian> Swap64; | |
729 | ||
730 | public: | |
b961d0d7 CC |
731 | Incremental_inputs_reader() |
732 | : p_(NULL), strtab_(NULL, 0), input_file_count_(0) | |
733 | { } | |
734 | ||
735 | Incremental_inputs_reader(const unsigned char* p, | |
736 | const elfcpp::Elf_strtab& strtab) | |
09ec0418 CC |
737 | : p_(p), strtab_(strtab) |
738 | { this->input_file_count_ = Swap32::readval(this->p_ + 4); } | |
739 | ||
740 | // Return the version number. | |
741 | unsigned int | |
742 | version() const | |
743 | { return Swap32::readval(this->p_); } | |
744 | ||
745 | // Return the count of input file entries. | |
746 | unsigned int | |
747 | input_file_count() const | |
748 | { return this->input_file_count_; } | |
749 | ||
750 | // Return the command line. | |
751 | const char* | |
752 | command_line() const | |
072fe7ce | 753 | { |
09ec0418 CC |
754 | unsigned int offset = Swap32::readval(this->p_ + 8); |
755 | return this->get_string(offset); | |
756 | } | |
072fe7ce | 757 | |
09ec0418 CC |
758 | // Reader class for an input file entry and its supplemental info. |
759 | class Incremental_input_entry_reader | |
760 | { | |
761 | public: | |
762 | Incremental_input_entry_reader(const Incremental_inputs_reader* inputs, | |
763 | unsigned int offset) | |
764 | : inputs_(inputs), offset_(offset) | |
765 | { | |
766 | this->info_offset_ = Swap32::readval(inputs->p_ + offset + 4); | |
cdc29364 | 767 | this->flags_ = Swap16::readval(this->inputs_->p_ + offset + 20); |
09ec0418 CC |
768 | } |
769 | ||
770 | // Return the filename. | |
771 | const char* | |
772 | filename() const | |
773 | { | |
774 | unsigned int offset = Swap32::readval(this->inputs_->p_ + this->offset_); | |
775 | return this->inputs_->get_string(offset); | |
776 | } | |
072fe7ce | 777 | |
cdc29364 CC |
778 | // Return the argument serial number. |
779 | unsigned int | |
780 | arg_serial() const | |
781 | { | |
782 | return Swap16::readval(this->inputs_->p_ + this->offset_ + 22); | |
783 | } | |
784 | ||
09ec0418 CC |
785 | // Return the timestamp. |
786 | Timespec | |
787 | get_mtime() const | |
788 | { | |
789 | Timespec t; | |
790 | const unsigned char* p = this->inputs_->p_ + this->offset_ + 8; | |
791 | t.seconds = Swap64::readval(p); | |
792 | t.nanoseconds = Swap32::readval(p+8); | |
793 | return t; | |
794 | } | |
795 | ||
796 | // Return the type of input file. | |
797 | Incremental_input_type | |
798 | type() const | |
cdc29364 CC |
799 | { return static_cast<Incremental_input_type>(this->flags_ & 0xff); } |
800 | ||
801 | // Return TRUE if the file was found in a system directory. | |
802 | bool | |
803 | is_in_system_directory() const | |
804 | { return (this->flags_ & INCREMENTAL_INPUT_IN_SYSTEM_DIR) != 0; } | |
09ec0418 | 805 | |
0f1c85a6 CC |
806 | // Return TRUE if the file was linked with --as-needed. |
807 | bool | |
808 | as_needed() const | |
809 | { return (this->flags_ & INCREMENTAL_INPUT_AS_NEEDED) != 0; } | |
810 | ||
09ec0418 CC |
811 | // Return the input section count -- for objects only. |
812 | unsigned int | |
813 | get_input_section_count() const | |
98fa85cb | 814 | { |
cdc29364 CC |
815 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT |
816 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
09ec0418 CC |
817 | return Swap32::readval(this->inputs_->p_ + this->info_offset_); |
818 | } | |
819 | ||
0f1c85a6 CC |
820 | // Return the soname -- for shared libraries only. |
821 | const char* | |
822 | get_soname() const | |
823 | { | |
824 | gold_assert(this->type() == INCREMENTAL_INPUT_SHARED_LIBRARY); | |
825 | unsigned int offset = Swap32::readval(this->inputs_->p_ | |
826 | + this->info_offset_); | |
827 | return this->inputs_->get_string(offset); | |
828 | } | |
829 | ||
09ec0418 CC |
830 | // Return the offset of the supplemental info for symbol SYMNDX -- |
831 | // for objects only. | |
832 | unsigned int | |
833 | get_symbol_offset(unsigned int symndx) const | |
834 | { | |
cdc29364 CC |
835 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT |
836 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
09ec0418 CC |
837 | |
838 | unsigned int section_count = this->get_input_section_count(); | |
89d8a36b | 839 | return (this->info_offset_ + 28 |
09ec0418 | 840 | + section_count * input_section_entry_size |
cdc29364 | 841 | + symndx * 20); |
09ec0418 CC |
842 | } |
843 | ||
844 | // Return the global symbol count -- for objects & shared libraries only. | |
845 | unsigned int | |
846 | get_global_symbol_count() const | |
847 | { | |
0f1c85a6 CC |
848 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT |
849 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER | |
850 | || this->type() == INCREMENTAL_INPUT_SHARED_LIBRARY); | |
851 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 4); | |
09ec0418 CC |
852 | } |
853 | ||
f0f9babf CC |
854 | // Return the offset of the first local symbol -- for objects only. |
855 | unsigned int | |
856 | get_local_symbol_offset() const | |
857 | { | |
858 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT | |
859 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
860 | ||
861 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 8); | |
862 | } | |
863 | ||
864 | // Return the local symbol count -- for objects only. | |
865 | unsigned int | |
866 | get_local_symbol_count() const | |
867 | { | |
868 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT | |
869 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
870 | ||
871 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 12); | |
872 | } | |
873 | ||
6fa2a40b CC |
874 | // Return the index of the first dynamic relocation -- for objects only. |
875 | unsigned int | |
876 | get_first_dyn_reloc() const | |
877 | { | |
878 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT | |
879 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
880 | ||
881 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 16); | |
882 | } | |
883 | ||
884 | // Return the dynamic relocation count -- for objects only. | |
885 | unsigned int | |
886 | get_dyn_reloc_count() const | |
887 | { | |
888 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT | |
889 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
890 | ||
891 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 20); | |
892 | } | |
893 | ||
89d8a36b CC |
894 | // Return the COMDAT group count -- for objects only. |
895 | unsigned int | |
896 | get_comdat_group_count() const | |
897 | { | |
898 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT | |
899 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
900 | ||
901 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 24); | |
902 | } | |
903 | ||
c7975edd CC |
904 | // Return the object count -- for scripts only. |
905 | unsigned int | |
906 | get_object_count() const | |
907 | { | |
cdc29364 | 908 | gold_assert(this->type() == INCREMENTAL_INPUT_SCRIPT); |
c7975edd CC |
909 | return Swap32::readval(this->inputs_->p_ + this->info_offset_); |
910 | } | |
911 | ||
912 | // Return the input file offset for object N -- for scripts only. | |
913 | unsigned int | |
914 | get_object_offset(unsigned int n) const | |
915 | { | |
cdc29364 | 916 | gold_assert(this->type() == INCREMENTAL_INPUT_SCRIPT); |
c7975edd CC |
917 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ |
918 | + 4 + n * 4); | |
919 | } | |
920 | ||
09ec0418 CC |
921 | // Return the member count -- for archives only. |
922 | unsigned int | |
923 | get_member_count() const | |
924 | { | |
cdc29364 | 925 | gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE); |
09ec0418 CC |
926 | return Swap32::readval(this->inputs_->p_ + this->info_offset_); |
927 | } | |
44453f85 | 928 | |
09ec0418 CC |
929 | // Return the unused symbol count -- for archives only. |
930 | unsigned int | |
931 | get_unused_symbol_count() const | |
932 | { | |
cdc29364 | 933 | gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE); |
09ec0418 CC |
934 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 4); |
935 | } | |
44453f85 | 936 | |
09ec0418 CC |
937 | // Return the input file offset for archive member N -- for archives only. |
938 | unsigned int | |
939 | get_member_offset(unsigned int n) const | |
940 | { | |
cdc29364 | 941 | gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE); |
09ec0418 CC |
942 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ |
943 | + 8 + n * 4); | |
944 | } | |
945 | ||
946 | // Return the Nth unused global symbol -- for archives only. | |
947 | const char* | |
948 | get_unused_symbol(unsigned int n) const | |
949 | { | |
cdc29364 | 950 | gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE); |
09ec0418 CC |
951 | unsigned int member_count = this->get_member_count(); |
952 | unsigned int offset = Swap32::readval(this->inputs_->p_ | |
953 | + this->info_offset_ + 8 | |
954 | + member_count * 4 | |
955 | + n * 4); | |
956 | return this->inputs_->get_string(offset); | |
957 | } | |
958 | ||
959 | // Information about an input section. | |
960 | struct Input_section_info | |
961 | { | |
962 | const char* name; | |
963 | unsigned int output_shndx; | |
964 | off_t sh_offset; | |
965 | off_t sh_size; | |
98fa85cb | 966 | }; |
072fe7ce | 967 | |
09ec0418 CC |
968 | // Return info about the Nth input section -- for objects only. |
969 | Input_section_info | |
970 | get_input_section(unsigned int n) const | |
971 | { | |
972 | Input_section_info info; | |
973 | const unsigned char* p = (this->inputs_->p_ | |
89d8a36b | 974 | + this->info_offset_ + 28 |
09ec0418 CC |
975 | + n * input_section_entry_size); |
976 | unsigned int name_offset = Swap32::readval(p); | |
977 | info.name = this->inputs_->get_string(name_offset); | |
978 | info.output_shndx = Swap32::readval(p + 4); | |
979 | info.sh_offset = Swap::readval(p + 8); | |
980 | info.sh_size = Swap::readval(p + 8 + size / 8); | |
981 | return info; | |
982 | } | |
983 | ||
09ec0418 | 984 | // Return info about the Nth global symbol -- for objects only. |
cdc29364 CC |
985 | Incremental_global_symbol_reader<big_endian> |
986 | get_global_symbol_reader(unsigned int n) const | |
09ec0418 | 987 | { |
cdc29364 CC |
988 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT |
989 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
09ec0418 CC |
990 | unsigned int section_count = this->get_input_section_count(); |
991 | const unsigned char* p = (this->inputs_->p_ | |
89d8a36b | 992 | + this->info_offset_ + 28 |
09ec0418 | 993 | + section_count * input_section_entry_size |
cdc29364 CC |
994 | + n * 20); |
995 | return Incremental_global_symbol_reader<big_endian>(p); | |
996 | } | |
997 | ||
89d8a36b CC |
998 | // Return the signature of the Nth comdat group -- for objects only. |
999 | const char* | |
1000 | get_comdat_group_signature(unsigned int n) const | |
1001 | { | |
1002 | unsigned int section_count = this->get_input_section_count(); | |
1003 | unsigned int symbol_count = this->get_global_symbol_count(); | |
1004 | const unsigned char* p = (this->inputs_->p_ | |
1005 | + this->info_offset_ + 28 | |
1006 | + section_count * input_section_entry_size | |
1007 | + symbol_count * 20 | |
1008 | + n * 4); | |
1009 | unsigned int name_offset = Swap32::readval(p); | |
1010 | return this->inputs_->get_string(name_offset); | |
1011 | } | |
1012 | ||
cdc29364 CC |
1013 | // Return the output symbol index for the Nth global symbol -- for shared |
1014 | // libraries only. Sets *IS_DEF to TRUE if the symbol is defined in this | |
1015 | // input file. | |
1016 | unsigned int | |
1017 | get_output_symbol_index(unsigned int n, bool* is_def) | |
1018 | { | |
1019 | gold_assert(this->type() == INCREMENTAL_INPUT_SHARED_LIBRARY); | |
1020 | const unsigned char* p = (this->inputs_->p_ | |
0f1c85a6 | 1021 | + this->info_offset_ + 8 |
cdc29364 CC |
1022 | + n * 4); |
1023 | unsigned int output_symndx = Swap32::readval(p); | |
1024 | *is_def = (output_symndx & (1U << 31)) != 0; | |
1025 | return output_symndx & ((1U << 31) - 1); | |
09ec0418 | 1026 | } |
44453f85 | 1027 | |
09ec0418 CC |
1028 | private: |
1029 | // Size of an input section entry. | |
1030 | static const unsigned int input_section_entry_size = 8 + 2 * size / 8; | |
1031 | // The reader instance for the containing section. | |
1032 | const Incremental_inputs_reader* inputs_; | |
cdc29364 CC |
1033 | // The flags, including the type of input file. |
1034 | unsigned int flags_; | |
09ec0418 CC |
1035 | // Section offset to the input file entry. |
1036 | unsigned int offset_; | |
1037 | // Section offset to the supplemental info for the input file. | |
1038 | unsigned int info_offset_; | |
072fe7ce ILT |
1039 | }; |
1040 | ||
cdc29364 CC |
1041 | // Return the offset of an input file entry given its index N. |
1042 | unsigned int | |
1043 | input_file_offset(unsigned int n) const | |
1044 | { | |
1045 | gold_assert(n < this->input_file_count_); | |
1046 | return 16 + n * 24; | |
1047 | } | |
1048 | ||
1049 | // Return the index of an input file entry given its OFFSET. | |
1050 | unsigned int | |
1051 | input_file_index(unsigned int offset) const | |
1052 | { | |
1053 | int n = (offset - 16) / 24; | |
1054 | gold_assert(input_file_offset(n) == offset); | |
1055 | return n; | |
1056 | } | |
1057 | ||
09ec0418 CC |
1058 | // Return a reader for the Nth input file entry. |
1059 | Incremental_input_entry_reader | |
1060 | input_file(unsigned int n) const | |
cdc29364 CC |
1061 | { return Incremental_input_entry_reader(this, this->input_file_offset(n)); } |
1062 | ||
1063 | // Return a reader for the input file entry at OFFSET. | |
1064 | Incremental_input_entry_reader | |
1065 | input_file_at_offset(unsigned int offset) const | |
09ec0418 | 1066 | { |
cdc29364 CC |
1067 | gold_assert(offset < 16 + this->input_file_count_ * 24); |
1068 | return Incremental_input_entry_reader(this, offset); | |
09ec0418 CC |
1069 | } |
1070 | ||
94a3fc8b CC |
1071 | // Return a reader for the global symbol info at OFFSET. |
1072 | Incremental_global_symbol_reader<big_endian> | |
1073 | global_symbol_reader_at_offset(unsigned int offset) const | |
1074 | { | |
1075 | const unsigned char* p = this->p_ + offset; | |
1076 | return Incremental_global_symbol_reader<big_endian>(p); | |
1077 | } | |
1078 | ||
09ec0418 CC |
1079 | private: |
1080 | // Lookup a string in the ELF string table. | |
1081 | const char* get_string(unsigned int offset) const | |
1082 | { | |
1083 | const char* s; | |
1084 | if (this->strtab_.get_c_string(offset, &s)) | |
1085 | return s; | |
1086 | return NULL; | |
1087 | } | |
1088 | ||
1089 | // Base address of the .gnu_incremental_inputs section. | |
1090 | const unsigned char* p_; | |
1091 | // The associated ELF string table. | |
1092 | elfcpp::Elf_strtab strtab_; | |
1093 | // The number of input file entries in this section. | |
1094 | unsigned int input_file_count_; | |
1095 | }; | |
1096 | ||
1097 | // Reader class for the .gnu_incremental_symtab section. | |
072fe7ce | 1098 | |
09ec0418 CC |
1099 | template<bool big_endian> |
1100 | class Incremental_symtab_reader | |
1101 | { | |
1102 | public: | |
b961d0d7 CC |
1103 | Incremental_symtab_reader() |
1104 | : p_(NULL), len_(0) | |
1105 | { } | |
1106 | ||
1107 | Incremental_symtab_reader(const unsigned char* p, off_t len) | |
1108 | : p_(p), len_(len) | |
09ec0418 | 1109 | { } |
44453f85 | 1110 | |
b961d0d7 CC |
1111 | // Return the count of symbols in this section. |
1112 | unsigned int | |
1113 | symbol_count() const | |
1114 | { return static_cast<unsigned int>(this->len_ / 4); } | |
1115 | ||
09ec0418 | 1116 | // Return the list head for symbol table entry N. |
b961d0d7 CC |
1117 | unsigned int |
1118 | get_list_head(unsigned int n) const | |
09ec0418 | 1119 | { return elfcpp::Swap<32, big_endian>::readval(this->p_ + 4 * n); } |
072fe7ce | 1120 | |
09ec0418 CC |
1121 | private: |
1122 | // Base address of the .gnu_incremental_relocs section. | |
1123 | const unsigned char* p_; | |
b961d0d7 CC |
1124 | // Size of the section. |
1125 | off_t len_; | |
09ec0418 | 1126 | }; |
3ce2c28e | 1127 | |
09ec0418 | 1128 | // Reader class for the .gnu_incremental_relocs section. |
c4aa1e2d | 1129 | |
09ec0418 CC |
1130 | template<int size, bool big_endian> |
1131 | class Incremental_relocs_reader | |
1132 | { | |
1133 | private: | |
1134 | // Size of each field. | |
1135 | static const unsigned int field_size = size / 8; | |
c4aa1e2d | 1136 | |
09ec0418 CC |
1137 | public: |
1138 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
1139 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Addend; | |
1140 | ||
1141 | // Size of each entry. | |
1142 | static const unsigned int reloc_size = 8 + 2 * field_size; | |
1143 | ||
b961d0d7 CC |
1144 | Incremental_relocs_reader() |
1145 | : p_(NULL), len_(0) | |
1146 | { } | |
1147 | ||
1148 | Incremental_relocs_reader(const unsigned char* p, off_t len) | |
1149 | : p_(p), len_(len) | |
09ec0418 CC |
1150 | { } |
1151 | ||
b961d0d7 CC |
1152 | // Return the count of relocations in this section. |
1153 | unsigned int | |
1154 | reloc_count() const | |
1155 | { return static_cast<unsigned int>(this->len_ / reloc_size); } | |
1156 | ||
09ec0418 CC |
1157 | // Return the relocation type for relocation entry at offset OFF. |
1158 | unsigned int | |
0e70b911 | 1159 | get_r_type(unsigned int off) const |
cdc29364 | 1160 | { return elfcpp::Swap<32, big_endian>::readval(this->p_ + off); } |
09ec0418 CC |
1161 | |
1162 | // Return the output section index for relocation entry at offset OFF. | |
1163 | unsigned int | |
0e70b911 | 1164 | get_r_shndx(unsigned int off) const |
cdc29364 | 1165 | { return elfcpp::Swap<32, big_endian>::readval(this->p_ + off + 4); } |
09ec0418 CC |
1166 | |
1167 | // Return the output section offset for relocation entry at offset OFF. | |
1168 | Address | |
0e70b911 | 1169 | get_r_offset(unsigned int off) const |
cdc29364 | 1170 | { return elfcpp::Swap<size, big_endian>::readval(this->p_ + off + 8); } |
09ec0418 CC |
1171 | |
1172 | // Return the addend for relocation entry at offset OFF. | |
1173 | Addend | |
0e70b911 | 1174 | get_r_addend(unsigned int off) const |
09ec0418 CC |
1175 | { |
1176 | return elfcpp::Swap<size, big_endian>::readval(this->p_ + off + 8 | |
1177 | + this->field_size); | |
1178 | } | |
1179 | ||
cdc29364 CC |
1180 | // Return a pointer to the relocation entry at offset OFF. |
1181 | const unsigned char* | |
1182 | data(unsigned int off) const | |
1183 | { return this->p_ + off; } | |
1184 | ||
09ec0418 CC |
1185 | private: |
1186 | // Base address of the .gnu_incremental_relocs section. | |
1187 | const unsigned char* p_; | |
b961d0d7 CC |
1188 | // Size of the section. |
1189 | off_t len_; | |
3ce2c28e ILT |
1190 | }; |
1191 | ||
0e70b911 CC |
1192 | // Reader class for the .gnu_incremental_got_plt section. |
1193 | ||
1194 | template<bool big_endian> | |
1195 | class Incremental_got_plt_reader | |
1196 | { | |
1197 | public: | |
b961d0d7 CC |
1198 | Incremental_got_plt_reader() |
1199 | : p_(NULL), got_count_(0), got_desc_p_(NULL), plt_desc_p_(NULL) | |
1200 | { } | |
1201 | ||
0e70b911 CC |
1202 | Incremental_got_plt_reader(const unsigned char* p) : p_(p) |
1203 | { | |
1204 | this->got_count_ = elfcpp::Swap<32, big_endian>::readval(p); | |
1205 | this->got_desc_p_ = p + 8 + ((this->got_count_ + 3) & ~3); | |
6fa2a40b | 1206 | this->plt_desc_p_ = this->got_desc_p_ + this->got_count_ * 8; |
0e70b911 CC |
1207 | } |
1208 | ||
1209 | // Return the GOT entry count. | |
1210 | unsigned int | |
1211 | get_got_entry_count() const | |
1212 | { | |
1213 | return this->got_count_; | |
1214 | } | |
1215 | ||
1216 | // Return the PLT entry count. | |
1217 | unsigned int | |
1218 | get_plt_entry_count() const | |
1219 | { | |
1220 | return elfcpp::Swap<32, big_endian>::readval(this->p_ + 4); | |
1221 | } | |
1222 | ||
1223 | // Return the GOT type for GOT entry N. | |
1224 | unsigned int | |
1225 | get_got_type(unsigned int n) | |
1226 | { | |
1227 | return this->p_[8 + n]; | |
1228 | } | |
1229 | ||
6fa2a40b CC |
1230 | // Return the symbol index for GOT entry N. |
1231 | unsigned int | |
1232 | get_got_symndx(unsigned int n) | |
1233 | { | |
1234 | return elfcpp::Swap<32, big_endian>::readval(this->got_desc_p_ + n * 8); | |
1235 | } | |
1236 | ||
1237 | // Return the input file index for GOT entry N. | |
0e70b911 | 1238 | unsigned int |
6fa2a40b | 1239 | get_got_input_index(unsigned int n) |
0e70b911 | 1240 | { |
6fa2a40b | 1241 | return elfcpp::Swap<32, big_endian>::readval(this->got_desc_p_ + n * 8 + 4); |
0e70b911 CC |
1242 | } |
1243 | ||
1244 | // Return the PLT descriptor for PLT entry N. | |
1245 | unsigned int | |
1246 | get_plt_desc(unsigned int n) | |
1247 | { | |
1248 | return elfcpp::Swap<32, big_endian>::readval(this->plt_desc_p_ + n * 4); | |
1249 | } | |
1250 | ||
1251 | private: | |
1252 | // Base address of the .gnu_incremental_got_plt section. | |
1253 | const unsigned char* p_; | |
1254 | // GOT entry count. | |
1255 | unsigned int got_count_; | |
1256 | // Base address of the GOT descriptor array. | |
1257 | const unsigned char* got_desc_p_; | |
1258 | // Base address of the PLT descriptor array. | |
1259 | const unsigned char* plt_desc_p_; | |
1260 | }; | |
1261 | ||
b961d0d7 CC |
1262 | // An object representing the ELF file we edit during an incremental build. |
1263 | // Similar to Object or Dynobj, but operates on Output_file and contains | |
1264 | // methods to support incremental updating. This is the abstract parent class | |
1265 | // implemented in Sized_incremental_binary<size, big_endian> for a specific | |
1266 | // endianness and size. | |
1267 | ||
1268 | class Incremental_binary | |
1269 | { | |
1270 | public: | |
1271 | Incremental_binary(Output_file* output, Target* target) | |
cdc29364 CC |
1272 | : input_args_map_(), library_map_(), script_map_(), |
1273 | output_(output), target_(target) | |
b961d0d7 CC |
1274 | { } |
1275 | ||
1276 | virtual | |
1277 | ~Incremental_binary() | |
1278 | { } | |
1279 | ||
1280 | // Check the .gnu_incremental_inputs section to see whether an incremental | |
1281 | // build is possible. | |
1282 | bool | |
cdc29364 CC |
1283 | check_inputs(const Command_line& cmdline, |
1284 | Incremental_inputs* incremental_inputs) | |
1285 | { return this->do_check_inputs(cmdline, incremental_inputs); } | |
b961d0d7 CC |
1286 | |
1287 | // Report an error. | |
1288 | void | |
1289 | error(const char* format, ...) const ATTRIBUTE_PRINTF_2; | |
1290 | ||
cdc29364 CC |
1291 | // Proxy class for a sized Incremental_input_entry_reader. |
1292 | ||
b961d0d7 CC |
1293 | class Input_reader |
1294 | { | |
1295 | public: | |
1296 | Input_reader() | |
1297 | { } | |
1298 | ||
1299 | virtual | |
1300 | ~Input_reader() | |
1301 | { } | |
1302 | ||
1303 | const char* | |
1304 | filename() const | |
1305 | { return this->do_filename(); } | |
1306 | ||
1307 | Timespec | |
1308 | get_mtime() const | |
1309 | { return this->do_get_mtime(); } | |
1310 | ||
1311 | Incremental_input_type | |
1312 | type() const | |
1313 | { return this->do_type(); } | |
1314 | ||
cdc29364 CC |
1315 | unsigned int |
1316 | arg_serial() const | |
1317 | { return this->do_arg_serial(); } | |
1318 | ||
1319 | unsigned int | |
1320 | get_unused_symbol_count() const | |
1321 | { return this->do_get_unused_symbol_count(); } | |
1322 | ||
1323 | const char* | |
1324 | get_unused_symbol(unsigned int n) const | |
1325 | { return this->do_get_unused_symbol(n); } | |
1326 | ||
b961d0d7 CC |
1327 | protected: |
1328 | virtual const char* | |
1329 | do_filename() const = 0; | |
1330 | ||
1331 | virtual Timespec | |
1332 | do_get_mtime() const = 0; | |
1333 | ||
1334 | virtual Incremental_input_type | |
1335 | do_type() const = 0; | |
cdc29364 CC |
1336 | |
1337 | virtual unsigned int | |
1338 | do_arg_serial() const = 0; | |
1339 | ||
1340 | virtual unsigned int | |
1341 | do_get_unused_symbol_count() const = 0; | |
1342 | ||
1343 | virtual const char* | |
1344 | do_get_unused_symbol(unsigned int n) const = 0; | |
b961d0d7 CC |
1345 | }; |
1346 | ||
cdc29364 CC |
1347 | // Return the number of input files. |
1348 | unsigned int | |
1349 | input_file_count() const | |
1350 | { return this->do_input_file_count(); } | |
1351 | ||
1352 | // Return an Input_reader for input file N. | |
1353 | const Input_reader* | |
1354 | get_input_reader(unsigned int n) const | |
1355 | { return this->do_get_input_reader(n); } | |
1356 | ||
1357 | // Return TRUE if the input file N has changed since the last link. | |
1358 | bool | |
1359 | file_has_changed(unsigned int n) const | |
1360 | { return this->do_file_has_changed(n); } | |
1361 | ||
1362 | // Return the Input_argument for input file N. Returns NULL if | |
1363 | // the Input_argument is not available. | |
1364 | const Input_argument* | |
1365 | get_input_argument(unsigned int n) const | |
1366 | { | |
1367 | const Input_reader* input_file = this->do_get_input_reader(n); | |
1368 | unsigned int arg_serial = input_file->arg_serial(); | |
1369 | if (arg_serial == 0 || arg_serial > this->input_args_map_.size()) | |
1370 | return NULL; | |
1371 | return this->input_args_map_[arg_serial - 1]; | |
1372 | } | |
1373 | ||
1374 | // Return an Incremental_library for the given input file. | |
1375 | Incremental_library* | |
1376 | get_library(unsigned int n) | |
1377 | { return this->library_map_[n]; } | |
1378 | ||
1379 | // Return a Script_info for the given input file. | |
1380 | Script_info* | |
1381 | get_script_info(unsigned int n) | |
1382 | { return this->script_map_[n]; } | |
1383 | ||
1384 | // Initialize the layout of the output file based on the existing | |
1385 | // output file. | |
1386 | void | |
1387 | init_layout(Layout* layout) | |
1388 | { this->do_init_layout(layout); } | |
1389 | ||
1390 | // Mark regions of the input file that must be kept unchanged. | |
1391 | void | |
1392 | reserve_layout(unsigned int input_file_index) | |
1393 | { this->do_reserve_layout(input_file_index); } | |
b961d0d7 | 1394 | |
4829d394 CC |
1395 | // Process the GOT and PLT entries from the existing output file. |
1396 | void | |
1397 | process_got_plt(Symbol_table* symtab, Layout* layout) | |
1398 | { this->do_process_got_plt(symtab, layout); } | |
1399 | ||
94a3fc8b CC |
1400 | // Apply incremental relocations for symbols whose values have changed. |
1401 | void | |
1402 | apply_incremental_relocs(const Symbol_table* symtab, Layout* layout, | |
1403 | Output_file* of) | |
1404 | { this->do_apply_incremental_relocs(symtab, layout, of); } | |
1405 | ||
b961d0d7 CC |
1406 | // Functions and types for the elfcpp::Elf_file interface. This |
1407 | // permit us to use Incremental_binary as the File template parameter for | |
1408 | // elfcpp::Elf_file. | |
1409 | ||
1410 | // The View class is returned by view. It must support a single | |
1411 | // method, data(). This is trivial, because Output_file::get_output_view | |
1412 | // does what we need. | |
1413 | class View | |
1414 | { | |
1415 | public: | |
1416 | View(const unsigned char* p) | |
1417 | : p_(p) | |
1418 | { } | |
1419 | ||
1420 | const unsigned char* | |
1421 | data() const | |
1422 | { return this->p_; } | |
1423 | ||
1424 | private: | |
1425 | const unsigned char* p_; | |
1426 | }; | |
1427 | ||
1428 | // Return a View. | |
1429 | View | |
1430 | view(off_t file_offset, section_size_type data_size) | |
1431 | { return View(this->output_->get_input_view(file_offset, data_size)); } | |
1432 | ||
1433 | // A location in the file. | |
1434 | struct Location | |
1435 | { | |
1436 | off_t file_offset; | |
1437 | off_t data_size; | |
1438 | ||
1439 | Location(off_t fo, section_size_type ds) | |
1440 | : file_offset(fo), data_size(ds) | |
1441 | { } | |
1442 | ||
1443 | Location() | |
1444 | : file_offset(0), data_size(0) | |
1445 | { } | |
1446 | }; | |
1447 | ||
1448 | // Get a View given a Location. | |
1449 | View | |
1450 | view(Location loc) | |
1451 | { return View(this->view(loc.file_offset, loc.data_size)); } | |
1452 | ||
cdc29364 CC |
1453 | // Return the Output_file. |
1454 | Output_file* | |
1455 | output_file() | |
1456 | { return this->output_; } | |
1457 | ||
b961d0d7 CC |
1458 | protected: |
1459 | // Check the .gnu_incremental_inputs section to see whether an incremental | |
1460 | // build is possible. | |
1461 | virtual bool | |
cdc29364 CC |
1462 | do_check_inputs(const Command_line& cmdline, |
1463 | Incremental_inputs* incremental_inputs) = 0; | |
b961d0d7 | 1464 | |
cdc29364 | 1465 | // Return TRUE if input file N has changed since the last incremental link. |
b961d0d7 | 1466 | virtual bool |
cdc29364 CC |
1467 | do_file_has_changed(unsigned int n) const = 0; |
1468 | ||
1469 | // Initialize the layout of the output file based on the existing | |
1470 | // output file. | |
1471 | virtual void | |
1472 | do_init_layout(Layout* layout) = 0; | |
1473 | ||
1474 | // Mark regions of the input file that must be kept unchanged. | |
1475 | virtual void | |
1476 | do_reserve_layout(unsigned int input_file_index) = 0; | |
1477 | ||
4829d394 CC |
1478 | // Process the GOT and PLT entries from the existing output file. |
1479 | virtual void | |
1480 | do_process_got_plt(Symbol_table* symtab, Layout* layout) = 0; | |
1481 | ||
94a3fc8b CC |
1482 | // Apply incremental relocations for symbols whose values have changed. |
1483 | virtual void | |
1484 | do_apply_incremental_relocs(const Symbol_table*, Layout*, Output_file*) = 0; | |
1485 | ||
cdc29364 CC |
1486 | virtual unsigned int |
1487 | do_input_file_count() const = 0; | |
b961d0d7 | 1488 | |
cdc29364 CC |
1489 | virtual const Input_reader* |
1490 | do_get_input_reader(unsigned int) const = 0; | |
1491 | ||
1492 | // Map from input file index to Input_argument. | |
1493 | std::vector<const Input_argument*> input_args_map_; | |
1494 | // Map from an input file index to an Incremental_library. | |
1495 | std::vector<Incremental_library*> library_map_; | |
1496 | // Map from an input file index to a Script_info. | |
1497 | std::vector<Script_info*> script_map_; | |
b961d0d7 CC |
1498 | |
1499 | private: | |
1500 | // Edited output file object. | |
1501 | Output_file* output_; | |
1502 | // Target of the output file. | |
1503 | Target* target_; | |
1504 | }; | |
1505 | ||
6fa2a40b CC |
1506 | template<int size, bool big_endian> |
1507 | class Sized_relobj_incr; | |
1508 | ||
b961d0d7 CC |
1509 | template<int size, bool big_endian> |
1510 | class Sized_incremental_binary : public Incremental_binary | |
1511 | { | |
1512 | public: | |
1513 | Sized_incremental_binary(Output_file* output, | |
1514 | const elfcpp::Ehdr<size, big_endian>& ehdr, | |
1515 | Target* target) | |
1516 | : Incremental_binary(output, target), elf_file_(this, ehdr), | |
6fa2a40b | 1517 | input_objects_(), section_map_(), symbol_map_(), main_symtab_loc_(), |
4829d394 CC |
1518 | main_strtab_loc_(), has_incremental_info_(false), inputs_reader_(), |
1519 | symtab_reader_(), relocs_reader_(), got_plt_reader_(), | |
cdc29364 | 1520 | input_entry_readers_() |
b961d0d7 CC |
1521 | { this->setup_readers(); } |
1522 | ||
1523 | // Returns TRUE if the file contains incremental info. | |
1524 | bool | |
1525 | has_incremental_info() const | |
1526 | { return this->has_incremental_info_; } | |
1527 | ||
6fa2a40b | 1528 | // Record a pointer to the object for input file N. |
4829d394 | 1529 | void |
6fa2a40b CC |
1530 | set_input_object(unsigned int n, |
1531 | Sized_relobj_incr<size, big_endian>* obj) | |
1532 | { this->input_objects_[n] = obj; } | |
4829d394 | 1533 | |
6fa2a40b CC |
1534 | // Return a pointer to the object for input file N. |
1535 | Sized_relobj_incr<size, big_endian>* | |
1536 | input_object(unsigned int n) const | |
4829d394 | 1537 | { |
6fa2a40b CC |
1538 | gold_assert(n < this->input_objects_.size()); |
1539 | return this->input_objects_[n]; | |
4829d394 CC |
1540 | } |
1541 | ||
cdc29364 CC |
1542 | // Return the Output_section for section index SHNDX. |
1543 | Output_section* | |
1544 | output_section(unsigned int shndx) | |
1545 | { return this->section_map_[shndx]; } | |
1546 | ||
4829d394 | 1547 | // Map a symbol table entry from the base file to the output symbol table. |
94a3fc8b CC |
1548 | // SYMNDX is relative to the first forced-local or global symbol in the |
1549 | // input file symbol table. | |
1550 | void | |
1551 | add_global_symbol(unsigned int symndx, Symbol* gsym) | |
1552 | { this->symbol_map_[symndx] = gsym; } | |
1553 | ||
4829d394 | 1554 | // Map a symbol table entry from the base file to the output symbol table. |
94a3fc8b CC |
1555 | // SYMNDX is relative to the first forced-local or global symbol in the |
1556 | // input file symbol table. | |
1557 | Symbol* | |
1558 | global_symbol(unsigned int symndx) const | |
1559 | { return this->symbol_map_[symndx]; } | |
1560 | ||
b961d0d7 CC |
1561 | // Readers for the incremental info sections. |
1562 | ||
cdc29364 | 1563 | const Incremental_inputs_reader<size, big_endian>& |
b961d0d7 CC |
1564 | inputs_reader() const |
1565 | { return this->inputs_reader_; } | |
1566 | ||
cdc29364 | 1567 | const Incremental_symtab_reader<big_endian>& |
b961d0d7 CC |
1568 | symtab_reader() const |
1569 | { return this->symtab_reader_; } | |
1570 | ||
cdc29364 | 1571 | const Incremental_relocs_reader<size, big_endian>& |
b961d0d7 CC |
1572 | relocs_reader() const |
1573 | { return this->relocs_reader_; } | |
1574 | ||
cdc29364 | 1575 | const Incremental_got_plt_reader<big_endian>& |
b961d0d7 CC |
1576 | got_plt_reader() const |
1577 | { return this->got_plt_reader_; } | |
1578 | ||
cdc29364 CC |
1579 | void |
1580 | get_symtab_view(View* symtab_view, unsigned int* sym_count, | |
1581 | elfcpp::Elf_strtab* strtab); | |
1582 | ||
b961d0d7 | 1583 | protected: |
cdc29364 CC |
1584 | typedef Incremental_inputs_reader<size, big_endian> Inputs_reader; |
1585 | typedef typename Inputs_reader::Incremental_input_entry_reader | |
1586 | Input_entry_reader; | |
1587 | ||
b961d0d7 | 1588 | virtual bool |
cdc29364 CC |
1589 | do_check_inputs(const Command_line& cmdline, |
1590 | Incremental_inputs* incremental_inputs); | |
b961d0d7 | 1591 | |
cdc29364 | 1592 | // Return TRUE if input file N has changed since the last incremental link. |
b961d0d7 | 1593 | virtual bool |
cdc29364 CC |
1594 | do_file_has_changed(unsigned int n) const; |
1595 | ||
1596 | // Initialize the layout of the output file based on the existing | |
1597 | // output file. | |
1598 | virtual void | |
1599 | do_init_layout(Layout* layout); | |
1600 | ||
1601 | // Mark regions of the input file that must be kept unchanged. | |
1602 | virtual void | |
1603 | do_reserve_layout(unsigned int input_file_index); | |
1604 | ||
4829d394 CC |
1605 | // Process the GOT and PLT entries from the existing output file. |
1606 | virtual void | |
1607 | do_process_got_plt(Symbol_table* symtab, Layout* layout); | |
1608 | ||
94a3fc8b CC |
1609 | // Apply incremental relocations for symbols whose values have changed. |
1610 | virtual void | |
1611 | do_apply_incremental_relocs(const Symbol_table* symtab, Layout* layout, | |
1612 | Output_file* of); | |
1613 | ||
cdc29364 | 1614 | // Proxy class for a sized Incremental_input_entry_reader. |
b961d0d7 | 1615 | |
b961d0d7 CC |
1616 | class Sized_input_reader : public Input_reader |
1617 | { | |
1618 | public: | |
b961d0d7 CC |
1619 | Sized_input_reader(Input_entry_reader r) |
1620 | : Input_reader(), reader_(r) | |
1621 | { } | |
1622 | ||
1623 | virtual | |
1624 | ~Sized_input_reader() | |
1625 | { } | |
1626 | ||
1627 | private: | |
1628 | const char* | |
1629 | do_filename() const | |
1630 | { return this->reader_.filename(); } | |
1631 | ||
1632 | Timespec | |
1633 | do_get_mtime() const | |
1634 | { return this->reader_.get_mtime(); } | |
1635 | ||
1636 | Incremental_input_type | |
1637 | do_type() const | |
1638 | { return this->reader_.type(); } | |
1639 | ||
cdc29364 CC |
1640 | unsigned int |
1641 | do_arg_serial() const | |
1642 | { return this->reader_.arg_serial(); } | |
1643 | ||
1644 | unsigned int | |
1645 | do_get_unused_symbol_count() const | |
1646 | { return this->reader_.get_unused_symbol_count(); } | |
1647 | ||
1648 | const char* | |
1649 | do_get_unused_symbol(unsigned int n) const | |
1650 | { return this->reader_.get_unused_symbol(n); } | |
1651 | ||
b961d0d7 CC |
1652 | Input_entry_reader reader_; |
1653 | }; | |
1654 | ||
cdc29364 CC |
1655 | virtual unsigned int |
1656 | do_input_file_count() const | |
1657 | { return this->inputs_reader_.input_file_count(); } | |
1658 | ||
1659 | virtual const Input_reader* | |
1660 | do_get_input_reader(unsigned int n) const | |
1661 | { | |
1662 | gold_assert(n < this->input_entry_readers_.size()); | |
1663 | return &this->input_entry_readers_[n]; | |
1664 | } | |
b961d0d7 CC |
1665 | |
1666 | private: | |
1667 | bool | |
1668 | find_incremental_inputs_sections(unsigned int* p_inputs_shndx, | |
1669 | unsigned int* p_symtab_shndx, | |
1670 | unsigned int* p_relocs_shndx, | |
1671 | unsigned int* p_got_plt_shndx, | |
1672 | unsigned int* p_strtab_shndx); | |
1673 | ||
1674 | void | |
1675 | setup_readers(); | |
1676 | ||
1677 | // Output as an ELF file. | |
1678 | elfcpp::Elf_file<size, big_endian, Incremental_binary> elf_file_; | |
1679 | ||
6fa2a40b CC |
1680 | // Vector of pointers to the input objects for the unchanged files. |
1681 | // For replaced files, the corresponding pointer is NULL. | |
1682 | std::vector<Sized_relobj_incr<size, big_endian>*> input_objects_; | |
4829d394 | 1683 | |
cdc29364 CC |
1684 | // Map section index to an Output_section in the updated layout. |
1685 | std::vector<Output_section*> section_map_; | |
1686 | ||
94a3fc8b CC |
1687 | // Map global symbols from the input file to the symbol table. |
1688 | std::vector<Symbol*> symbol_map_; | |
1689 | ||
4829d394 CC |
1690 | // Locations of the main symbol table and symbol string table. |
1691 | Location main_symtab_loc_; | |
1692 | Location main_strtab_loc_; | |
1693 | ||
b961d0d7 CC |
1694 | // Readers for the incremental info sections. |
1695 | bool has_incremental_info_; | |
1696 | Incremental_inputs_reader<size, big_endian> inputs_reader_; | |
1697 | Incremental_symtab_reader<big_endian> symtab_reader_; | |
1698 | Incremental_relocs_reader<size, big_endian> relocs_reader_; | |
1699 | Incremental_got_plt_reader<big_endian> got_plt_reader_; | |
cdc29364 CC |
1700 | std::vector<Sized_input_reader> input_entry_readers_; |
1701 | }; | |
1702 | ||
1703 | // An incremental Relobj. This class represents a relocatable object | |
1704 | // that has not changed since the last incremental link, and whose contents | |
1705 | // can be used directly from the base file. | |
1706 | ||
1707 | template<int size, bool big_endian> | |
6fa2a40b | 1708 | class Sized_relobj_incr : public Sized_relobj<size, big_endian> |
cdc29364 CC |
1709 | { |
1710 | public: | |
1711 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
6fa2a40b | 1712 | typedef typename Sized_relobj<size, big_endian>::Symbols Symbols; |
cdc29364 | 1713 | |
6fa2a40b | 1714 | Sized_relobj_incr(const std::string& name, |
cdc29364 CC |
1715 | Sized_incremental_binary<size, big_endian>* ibase, |
1716 | unsigned int input_file_index); | |
1717 | ||
cdc29364 | 1718 | private: |
f0f9babf | 1719 | // For convenience. |
6fa2a40b | 1720 | typedef Sized_relobj_incr<size, big_endian> This; |
f0f9babf CC |
1721 | static const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
1722 | ||
6fa2a40b | 1723 | typedef typename Sized_relobj<size, big_endian>::Output_sections |
cdc29364 CC |
1724 | Output_sections; |
1725 | typedef Incremental_inputs_reader<size, big_endian> Inputs_reader; | |
1726 | typedef typename Inputs_reader::Incremental_input_entry_reader | |
1727 | Input_entry_reader; | |
1728 | ||
f0f9babf CC |
1729 | // A local symbol. |
1730 | struct Local_symbol | |
1731 | { | |
1732 | Local_symbol(const char* name_, Address value_, unsigned int size_, | |
1733 | unsigned int shndx_, unsigned int type_, | |
1734 | bool needs_dynsym_entry_) | |
1735 | : st_value(value_), name(name_), st_size(size_), st_shndx(shndx_), | |
1736 | st_type(type_), output_dynsym_index(0), | |
1737 | needs_dynsym_entry(needs_dynsym_entry_) | |
1738 | { } | |
1739 | // The symbol value. | |
1740 | Address st_value; | |
1741 | // The symbol name. This points to the stringpool entry. | |
1742 | const char* name; | |
1743 | // The symbol size. | |
1744 | unsigned int st_size; | |
1745 | // The output section index. | |
1746 | unsigned int st_shndx : 28; | |
1747 | // The symbol type. | |
1748 | unsigned int st_type : 4; | |
1749 | // The index of the symbol in the output dynamic symbol table. | |
1750 | unsigned int output_dynsym_index : 31; | |
1751 | // TRUE if the symbol needs to appear in the dynamic symbol table. | |
1752 | unsigned int needs_dynsym_entry : 1; | |
1753 | }; | |
1754 | ||
cdc29364 CC |
1755 | // Return TRUE if this is an incremental (unchanged) input file. |
1756 | bool | |
1757 | do_is_incremental() const | |
1758 | { return true; } | |
1759 | ||
1760 | // Return the last modified time of the file. | |
1761 | Timespec | |
1762 | do_get_mtime() | |
1763 | { return this->input_reader_.get_mtime(); } | |
1764 | ||
1765 | // Read the symbols. | |
1766 | void | |
1767 | do_read_symbols(Read_symbols_data*); | |
1768 | ||
1769 | // Lay out the input sections. | |
1770 | void | |
1771 | do_layout(Symbol_table*, Layout*, Read_symbols_data*); | |
1772 | ||
1773 | // Layout sections whose layout was deferred while waiting for | |
1774 | // input files from a plugin. | |
1775 | void | |
1776 | do_layout_deferred_sections(Layout*); | |
1777 | ||
1778 | // Add the symbols to the symbol table. | |
1779 | void | |
1780 | do_add_symbols(Symbol_table*, Read_symbols_data*, Layout*); | |
1781 | ||
1782 | Archive::Should_include | |
1783 | do_should_include_member(Symbol_table* symtab, Layout*, Read_symbols_data*, | |
1784 | std::string* why); | |
1785 | ||
1786 | // Iterate over global symbols, calling a visitor class V for each. | |
1787 | void | |
1788 | do_for_all_global_symbols(Read_symbols_data* sd, | |
1789 | Library_base::Symbol_visitor_base* v); | |
1790 | ||
cdc29364 CC |
1791 | // Get the size of a section. |
1792 | uint64_t | |
1793 | do_section_size(unsigned int shndx); | |
1794 | ||
1795 | // Get the name of a section. | |
1796 | std::string | |
1797 | do_section_name(unsigned int shndx); | |
1798 | ||
1799 | // Return a view of the contents of a section. | |
1800 | Object::Location | |
1801 | do_section_contents(unsigned int shndx); | |
1802 | ||
1803 | // Return section flags. | |
1804 | uint64_t | |
1805 | do_section_flags(unsigned int shndx); | |
1806 | ||
1807 | // Return section entsize. | |
1808 | uint64_t | |
1809 | do_section_entsize(unsigned int shndx); | |
1810 | ||
1811 | // Return section address. | |
1812 | uint64_t | |
1813 | do_section_address(unsigned int shndx); | |
1814 | ||
1815 | // Return section type. | |
1816 | unsigned int | |
1817 | do_section_type(unsigned int shndx); | |
1818 | ||
1819 | // Return the section link field. | |
1820 | unsigned int | |
1821 | do_section_link(unsigned int shndx); | |
1822 | ||
1823 | // Return the section link field. | |
1824 | unsigned int | |
1825 | do_section_info(unsigned int shndx); | |
b961d0d7 | 1826 | |
cdc29364 CC |
1827 | // Return the section alignment. |
1828 | uint64_t | |
1829 | do_section_addralign(unsigned int shndx); | |
1830 | ||
1831 | // Return the Xindex structure to use. | |
1832 | Xindex* | |
1833 | do_initialize_xindex(); | |
1834 | ||
1835 | // Get symbol counts. | |
1836 | void | |
1837 | do_get_global_symbol_counts(const Symbol_table*, size_t*, size_t*) const; | |
1838 | ||
1839 | // Get global symbols. | |
1840 | const Symbols* | |
1841 | do_get_global_symbols() const | |
1842 | { return &this->symbols_; } | |
1843 | ||
1844 | // Return the number of local symbols. | |
1845 | unsigned int | |
1846 | do_local_symbol_count() const | |
f0f9babf CC |
1847 | { return this->local_symbol_count_; } |
1848 | ||
1849 | // Return the number of local symbols in the output symbol table. | |
1850 | unsigned int | |
1851 | do_output_local_symbol_count() const | |
1852 | { return this->local_symbol_count_; } | |
1853 | ||
1854 | // Return the file offset for local symbols in the output symbol table. | |
1855 | off_t | |
1856 | do_local_symbol_offset() const | |
1857 | { return this->local_symbol_offset_; } | |
cdc29364 CC |
1858 | |
1859 | // Read the relocs. | |
1860 | void | |
1861 | do_read_relocs(Read_relocs_data*); | |
1862 | ||
1863 | // Process the relocs to find list of referenced sections. Used only | |
1864 | // during garbage collection. | |
1865 | void | |
1866 | do_gc_process_relocs(Symbol_table*, Layout*, Read_relocs_data*); | |
1867 | ||
1868 | // Scan the relocs and adjust the symbol table. | |
1869 | void | |
1870 | do_scan_relocs(Symbol_table*, Layout*, Read_relocs_data*); | |
1871 | ||
1872 | // Count the local symbols. | |
1873 | void | |
1874 | do_count_local_symbols(Stringpool_template<char>*, | |
1875 | Stringpool_template<char>*); | |
1876 | ||
1877 | // Finalize the local symbols. | |
1878 | unsigned int | |
1879 | do_finalize_local_symbols(unsigned int, off_t, Symbol_table*); | |
1880 | ||
1881 | // Set the offset where local dynamic symbol information will be stored. | |
1882 | unsigned int | |
1883 | do_set_local_dynsym_indexes(unsigned int); | |
1884 | ||
1885 | // Set the offset where local dynamic symbol information will be stored. | |
1886 | unsigned int | |
1887 | do_set_local_dynsym_offset(off_t); | |
1888 | ||
1889 | // Relocate the input sections and write out the local symbols. | |
1890 | void | |
1891 | do_relocate(const Symbol_table* symtab, const Layout*, Output_file* of); | |
1892 | ||
1893 | // Set the offset of a section. | |
1894 | void | |
1895 | do_set_section_offset(unsigned int shndx, uint64_t off); | |
1896 | ||
1897 | // The Incremental_binary base file. | |
1898 | Sized_incremental_binary<size, big_endian>* ibase_; | |
1899 | // The index of the object in the input file list. | |
1900 | unsigned int input_file_index_; | |
1901 | // The reader for the input file. | |
1902 | Input_entry_reader input_reader_; | |
f0f9babf CC |
1903 | // The number of local symbols. |
1904 | unsigned int local_symbol_count_; | |
1905 | // The number of local symbols which go into the output file's dynamic | |
1906 | // symbol table. | |
1907 | unsigned int output_local_dynsym_count_; | |
1908 | // This starting symbol index in the output symbol table. | |
1909 | unsigned int local_symbol_index_; | |
1910 | // The file offset for local symbols in the output symbol table. | |
1911 | unsigned int local_symbol_offset_; | |
1912 | // The file offset for local symbols in the output symbol table. | |
1913 | unsigned int local_dynsym_offset_; | |
cdc29364 CC |
1914 | // The entries in the symbol table for the external symbols. |
1915 | Symbols symbols_; | |
cdc29364 CC |
1916 | // The offset of the first incremental relocation for this object. |
1917 | unsigned int incr_reloc_offset_; | |
1918 | // The number of incremental relocations for this object. | |
1919 | unsigned int incr_reloc_count_; | |
1920 | // The index of the first incremental relocation for this object in the | |
1921 | // updated output file. | |
1922 | unsigned int incr_reloc_output_index_; | |
1923 | // A copy of the incremental relocations from this object. | |
1924 | unsigned char* incr_relocs_; | |
f0f9babf CC |
1925 | // The local symbols. |
1926 | std::vector<Local_symbol> local_symbols_; | |
cdc29364 CC |
1927 | }; |
1928 | ||
1929 | // An incremental Dynobj. This class represents a shared object that has | |
1930 | // not changed since the last incremental link, and whose contents can be | |
1931 | // used directly from the base file. | |
1932 | ||
1933 | template<int size, bool big_endian> | |
1934 | class Sized_incr_dynobj : public Dynobj | |
1935 | { | |
1936 | public: | |
1937 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
1938 | ||
1939 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
1940 | ||
1941 | Sized_incr_dynobj(const std::string& name, | |
1942 | Sized_incremental_binary<size, big_endian>* ibase, | |
1943 | unsigned int input_file_index); | |
1944 | ||
1945 | private: | |
1946 | typedef Incremental_inputs_reader<size, big_endian> Inputs_reader; | |
1947 | typedef typename Inputs_reader::Incremental_input_entry_reader | |
1948 | Input_entry_reader; | |
1949 | ||
1950 | // Return TRUE if this is an incremental (unchanged) input file. | |
1951 | bool | |
1952 | do_is_incremental() const | |
1953 | { return true; } | |
1954 | ||
1955 | // Return the last modified time of the file. | |
1956 | Timespec | |
1957 | do_get_mtime() | |
1958 | { return this->input_reader_.get_mtime(); } | |
1959 | ||
1960 | // Read the symbols. | |
1961 | void | |
1962 | do_read_symbols(Read_symbols_data*); | |
1963 | ||
1964 | // Lay out the input sections. | |
1965 | void | |
1966 | do_layout(Symbol_table*, Layout*, Read_symbols_data*); | |
1967 | ||
1968 | // Add the symbols to the symbol table. | |
1969 | void | |
1970 | do_add_symbols(Symbol_table*, Read_symbols_data*, Layout*); | |
1971 | ||
1972 | Archive::Should_include | |
1973 | do_should_include_member(Symbol_table* symtab, Layout*, Read_symbols_data*, | |
1974 | std::string* why); | |
1975 | ||
1976 | // Iterate over global symbols, calling a visitor class V for each. | |
1977 | void | |
1978 | do_for_all_global_symbols(Read_symbols_data* sd, | |
1979 | Library_base::Symbol_visitor_base* v); | |
1980 | ||
1981 | // Iterate over local symbols, calling a visitor class V for each GOT offset | |
1982 | // associated with a local symbol. | |
1983 | void | |
1984 | do_for_all_local_got_entries(Got_offset_list::Visitor* v) const; | |
1985 | ||
1986 | // Get the size of a section. | |
1987 | uint64_t | |
1988 | do_section_size(unsigned int shndx); | |
1989 | ||
1990 | // Get the name of a section. | |
1991 | std::string | |
1992 | do_section_name(unsigned int shndx); | |
1993 | ||
1994 | // Return a view of the contents of a section. | |
1995 | Object::Location | |
1996 | do_section_contents(unsigned int shndx); | |
1997 | ||
1998 | // Return section flags. | |
1999 | uint64_t | |
2000 | do_section_flags(unsigned int shndx); | |
2001 | ||
2002 | // Return section entsize. | |
2003 | uint64_t | |
2004 | do_section_entsize(unsigned int shndx); | |
2005 | ||
2006 | // Return section address. | |
2007 | uint64_t | |
2008 | do_section_address(unsigned int shndx); | |
2009 | ||
2010 | // Return section type. | |
2011 | unsigned int | |
2012 | do_section_type(unsigned int shndx); | |
2013 | ||
2014 | // Return the section link field. | |
2015 | unsigned int | |
2016 | do_section_link(unsigned int shndx); | |
2017 | ||
2018 | // Return the section link field. | |
2019 | unsigned int | |
2020 | do_section_info(unsigned int shndx); | |
2021 | ||
2022 | // Return the section alignment. | |
2023 | uint64_t | |
2024 | do_section_addralign(unsigned int shndx); | |
2025 | ||
2026 | // Return the Xindex structure to use. | |
2027 | Xindex* | |
2028 | do_initialize_xindex(); | |
2029 | ||
2030 | // Get symbol counts. | |
2031 | void | |
2032 | do_get_global_symbol_counts(const Symbol_table*, size_t*, size_t*) const; | |
2033 | ||
2034 | // Get global symbols. | |
2035 | const Symbols* | |
2036 | do_get_global_symbols() const | |
2037 | { return &this->symbols_; } | |
2038 | ||
2039 | // The Incremental_binary base file. | |
2040 | Sized_incremental_binary<size, big_endian>* ibase_; | |
2041 | // The index of the object in the input file list. | |
2042 | unsigned int input_file_index_; | |
2043 | // The reader for the input file. | |
2044 | Input_entry_reader input_reader_; | |
2045 | // The entries in the symbol table for the external symbols. | |
2046 | Symbols symbols_; | |
2047 | }; | |
2048 | ||
2049 | // Allocate an incremental object of the appropriate size and endianness. | |
2050 | extern Object* | |
2051 | make_sized_incremental_object( | |
2052 | Incremental_binary* base, | |
2053 | unsigned int input_file_index, | |
2054 | Incremental_input_type input_type, | |
2055 | const Incremental_binary::Input_reader* input_reader); | |
2056 | ||
2057 | // This class represents an Archive library (or --start-lib/--end-lib group) | |
2058 | // that has not changed since the last incremental link. Its contents come | |
2059 | // from the incremental inputs entry in the base file. | |
2060 | ||
2061 | class Incremental_library : public Library_base | |
2062 | { | |
2063 | public: | |
2064 | Incremental_library(const char* filename, unsigned int input_file_index, | |
2065 | const Incremental_binary::Input_reader* input_reader) | |
2066 | : Library_base(NULL), filename_(filename), | |
2067 | input_file_index_(input_file_index), input_reader_(input_reader), | |
2068 | unused_symbols_(), is_reported_(false) | |
2069 | { } | |
2070 | ||
2071 | // Return the input file index. | |
2072 | unsigned int | |
2073 | input_file_index() const | |
2074 | { return this->input_file_index_; } | |
2075 | ||
2076 | // Return the serial number of the input file. | |
2077 | unsigned int | |
2078 | arg_serial() const | |
2079 | { return this->input_reader_->arg_serial(); } | |
2080 | ||
2081 | // Copy the unused symbols from the incremental input info. | |
2082 | // We need to do this because we may be overwriting the incremental | |
2083 | // input info in the base file before we write the new incremental | |
2084 | // info. | |
2085 | void | |
2086 | copy_unused_symbols(); | |
2087 | ||
2088 | // Return FALSE on the first call to indicate that the library needs | |
2089 | // to be recorded; return TRUE subsequently. | |
2090 | bool | |
2091 | is_reported() | |
2092 | { | |
2093 | bool was_reported = this->is_reported_; | |
2094 | is_reported_ = true; | |
2095 | return was_reported; | |
2096 | } | |
2097 | ||
2098 | private: | |
2099 | typedef std::vector<std::string> Symbol_list; | |
2100 | ||
2101 | // The file name. | |
2102 | const std::string& | |
2103 | do_filename() const | |
2104 | { return this->filename_; } | |
2105 | ||
2106 | // Return the modification time of the archive file. | |
2107 | Timespec | |
2108 | do_get_mtime() | |
2109 | { return this->input_reader_->get_mtime(); } | |
2110 | ||
2111 | // Iterator for unused global symbols in the library. | |
2112 | void | |
2113 | do_for_all_unused_symbols(Symbol_visitor_base* v) const; | |
2114 | ||
2115 | // The name of the library. | |
2116 | std::string filename_; | |
2117 | // The input file index of this library. | |
2118 | unsigned int input_file_index_; | |
2119 | // A reader for the incremental input information. | |
2120 | const Incremental_binary::Input_reader* input_reader_; | |
2121 | // List of unused symbols defined in this library. | |
2122 | Symbol_list unused_symbols_; | |
2123 | // TRUE when this library has been reported to the new incremental info. | |
2124 | bool is_reported_; | |
b961d0d7 CC |
2125 | }; |
2126 | ||
3ce2c28e ILT |
2127 | } // End namespace gold. |
2128 | ||
2129 | #endif // !defined(GOLD_INCREMENTAL_H) |