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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 | ||
26d3c67d CC |
71 | // Symbol flags for the incremental symbol table. |
72 | // These flags are stored in the top two bits of | |
73 | // the symbol index field. | |
74 | ||
75 | enum Incremental_shlib_symbol_flags | |
76 | { | |
77 | // Symbol is defined in this library. | |
78 | INCREMENTAL_SHLIB_SYM_DEF = 2, | |
79 | // Symbol is defined in this library, with a COPY relocation. | |
80 | INCREMENTAL_SHLIB_SYM_COPY = 3 | |
81 | }; | |
82 | ||
83 | static const int INCREMENTAL_SHLIB_SYM_FLAGS_SHIFT = 30; | |
84 | ||
c549a694 ILT |
85 | // Create an Incremental_binary object for FILE. Returns NULL is this is not |
86 | // possible, e.g. FILE is not an ELF file or has an unsupported target. | |
09ec0418 | 87 | |
c549a694 ILT |
88 | Incremental_binary* |
89 | open_incremental_binary(Output_file* file); | |
90 | ||
09ec0418 CC |
91 | // Base class for recording each input file. |
92 | ||
93 | class Incremental_input_entry | |
94 | { | |
95 | public: | |
cdc29364 CC |
96 | Incremental_input_entry(Stringpool::Key filename_key, unsigned int arg_serial, |
97 | Timespec mtime) | |
4829d394 | 98 | : filename_key_(filename_key), file_index_(0), offset_(0), info_offset_(0), |
0f1c85a6 CC |
99 | arg_serial_(arg_serial), mtime_(mtime), is_in_system_directory_(false), |
100 | as_needed_(false) | |
09ec0418 CC |
101 | { } |
102 | ||
b56648ad ILT |
103 | virtual |
104 | ~Incremental_input_entry() | |
105 | { } | |
106 | ||
09ec0418 CC |
107 | // Return the type of input file. |
108 | Incremental_input_type | |
109 | type() const | |
110 | { return this->do_type(); } | |
111 | ||
4829d394 | 112 | // Set the index and section offset of this input file entry. |
09ec0418 | 113 | void |
4829d394 CC |
114 | set_offset(unsigned int file_index, unsigned int offset) |
115 | { | |
116 | this->file_index_ = file_index; | |
117 | this->offset_ = offset; | |
118 | } | |
09ec0418 CC |
119 | |
120 | // Set the section offset of the supplemental information for this entry. | |
121 | void | |
122 | set_info_offset(unsigned int info_offset) | |
123 | { this->info_offset_ = info_offset; } | |
124 | ||
4829d394 CC |
125 | // Get the index of this input file entry. |
126 | unsigned int | |
127 | get_file_index() const | |
128 | { return this->file_index_; } | |
129 | ||
09ec0418 CC |
130 | // Get the section offset of this input file entry. |
131 | unsigned int | |
132 | get_offset() const | |
133 | { return this->offset_; } | |
134 | ||
135 | // Get the section offset of the supplemental information for this entry. | |
136 | unsigned int | |
137 | get_info_offset() const | |
138 | { return this->info_offset_; } | |
139 | ||
140 | // Get the stringpool key for the input filename. | |
141 | Stringpool::Key | |
142 | get_filename_key() const | |
143 | { return this->filename_key_; } | |
144 | ||
cdc29364 CC |
145 | // Get the serial number of the input file. |
146 | unsigned int | |
147 | arg_serial() const | |
148 | { return this->arg_serial_; } | |
149 | ||
09ec0418 CC |
150 | // Get the modification time of the input file. |
151 | const Timespec& | |
152 | get_mtime() const | |
153 | { return this->mtime_; } | |
154 | ||
cdc29364 CC |
155 | // Record that the file was found in a system directory. |
156 | void | |
157 | set_is_in_system_directory() | |
158 | { this->is_in_system_directory_ = true; } | |
159 | ||
160 | // Return TRUE if the file was found in a system directory. | |
161 | bool | |
162 | is_in_system_directory() const | |
163 | { return this->is_in_system_directory_; } | |
164 | ||
0f1c85a6 CC |
165 | // Record that the file was linked with --as-needed. |
166 | void | |
167 | set_as_needed() | |
168 | { this->as_needed_ = true; } | |
169 | ||
170 | // Return TRUE if the file was linked with --as-needed. | |
171 | bool | |
172 | as_needed() const | |
173 | { return this->as_needed_; } | |
174 | ||
09ec0418 CC |
175 | // Return a pointer to the derived Incremental_script_entry object. |
176 | // Return NULL for input entries that are not script files. | |
177 | Incremental_script_entry* | |
178 | script_entry() | |
179 | { return this->do_script_entry(); } | |
180 | ||
181 | // Return a pointer to the derived Incremental_object_entry object. | |
182 | // Return NULL for input entries that are not object files. | |
183 | Incremental_object_entry* | |
184 | object_entry() | |
185 | { return this->do_object_entry(); } | |
186 | ||
0f1c85a6 CC |
187 | // Return a pointer to the derived Incremental_dynobj_entry object. |
188 | // Return NULL for input entries that are not shared object files. | |
189 | Incremental_dynobj_entry* | |
190 | dynobj_entry() | |
191 | { return this->do_dynobj_entry(); } | |
192 | ||
09ec0418 CC |
193 | // Return a pointer to the derived Incremental_archive_entry object. |
194 | // Return NULL for input entries that are not archive files. | |
195 | Incremental_archive_entry* | |
196 | archive_entry() | |
197 | { return this->do_archive_entry(); } | |
198 | ||
199 | protected: | |
200 | // Return the type of input file. | |
201 | virtual Incremental_input_type | |
202 | do_type() const = 0; | |
203 | ||
204 | // Return a pointer to the derived Incremental_script_entry object. | |
205 | // Return NULL for input entries that are not script files. | |
206 | virtual Incremental_script_entry* | |
207 | do_script_entry() | |
208 | { return NULL; } | |
209 | ||
210 | // Return a pointer to the derived Incremental_object_entry object. | |
211 | // Return NULL for input entries that are not object files. | |
212 | virtual Incremental_object_entry* | |
213 | do_object_entry() | |
214 | { return NULL; } | |
215 | ||
0f1c85a6 CC |
216 | // Return a pointer to the derived Incremental_dynobj_entry object. |
217 | // Return NULL for input entries that are not shared object files. | |
218 | virtual Incremental_dynobj_entry* | |
219 | do_dynobj_entry() | |
220 | { return NULL; } | |
221 | ||
09ec0418 CC |
222 | // Return a pointer to the derived Incremental_archive_entry object. |
223 | // Return NULL for input entries that are not archive files. | |
224 | virtual Incremental_archive_entry* | |
225 | do_archive_entry() | |
226 | { return NULL; } | |
227 | ||
228 | private: | |
229 | // Key of the filename string in the section stringtable. | |
230 | Stringpool::Key filename_key_; | |
231 | ||
4829d394 CC |
232 | // Index of the entry in the output section. |
233 | unsigned int file_index_; | |
234 | ||
09ec0418 CC |
235 | // Offset of the entry in the output section. |
236 | unsigned int offset_; | |
237 | ||
238 | // Offset of the extra information in the output section. | |
239 | unsigned int info_offset_; | |
240 | ||
cdc29364 CC |
241 | // Serial number of the file in the argument list. |
242 | unsigned int arg_serial_; | |
243 | ||
09ec0418 CC |
244 | // Last modification time of the file. |
245 | Timespec mtime_; | |
cdc29364 CC |
246 | |
247 | // TRUE if the file was found in a system directory. | |
248 | bool is_in_system_directory_; | |
0f1c85a6 CC |
249 | |
250 | // TRUE if the file was linked with --as-needed. | |
251 | bool as_needed_; | |
cdc29364 CC |
252 | }; |
253 | ||
254 | // Information about a script input that will persist during the whole linker | |
255 | // run. Needed only during an incremental build to retrieve the input files | |
256 | // added by this script. | |
257 | ||
258 | class Script_info | |
259 | { | |
260 | public: | |
261 | Script_info(const std::string& filename) | |
262 | : filename_(filename), incremental_script_entry_(NULL) | |
263 | { } | |
264 | ||
265 | // Store a pointer to the incremental information for this script. | |
266 | void | |
267 | set_incremental_info(Incremental_script_entry* entry) | |
268 | { this->incremental_script_entry_ = entry; } | |
269 | ||
270 | // Return the filename. | |
271 | const std::string& | |
272 | filename() const | |
273 | { return this->filename_; } | |
274 | ||
275 | // Return the pointer to the incremental information for this script. | |
276 | Incremental_script_entry* | |
277 | incremental_info() const | |
278 | { return this->incremental_script_entry_; } | |
279 | ||
280 | private: | |
281 | const std::string filename_; | |
282 | Incremental_script_entry* incremental_script_entry_; | |
09ec0418 CC |
283 | }; |
284 | ||
285 | // Class for recording input scripts. | |
286 | ||
287 | class Incremental_script_entry : public Incremental_input_entry | |
288 | { | |
289 | public: | |
cdc29364 CC |
290 | Incremental_script_entry(Stringpool::Key filename_key, |
291 | unsigned int arg_serial, Script_info* script, | |
09ec0418 | 292 | Timespec mtime) |
cdc29364 CC |
293 | : Incremental_input_entry(filename_key, arg_serial, mtime), |
294 | script_(script), objects_() | |
09ec0418 CC |
295 | { } |
296 | ||
c7975edd CC |
297 | // Add a member object to the archive. |
298 | void | |
299 | add_object(Incremental_input_entry* obj_entry) | |
300 | { | |
301 | this->objects_.push_back(obj_entry); | |
302 | } | |
303 | ||
304 | // Return the number of objects included by this script. | |
305 | unsigned int | |
306 | get_object_count() | |
307 | { return this->objects_.size(); } | |
308 | ||
309 | // Return the Nth object. | |
310 | Incremental_input_entry* | |
311 | get_object(unsigned int n) | |
312 | { | |
313 | gold_assert(n < this->objects_.size()); | |
314 | return this->objects_[n]; | |
315 | } | |
316 | ||
09ec0418 CC |
317 | protected: |
318 | virtual Incremental_input_type | |
319 | do_type() const | |
320 | { return INCREMENTAL_INPUT_SCRIPT; } | |
321 | ||
322 | // Return a pointer to the derived Incremental_script_entry object. | |
323 | virtual Incremental_script_entry* | |
324 | do_script_entry() | |
325 | { return this; } | |
326 | ||
327 | private: | |
328 | // Information about the script file. | |
329 | Script_info* script_; | |
c7975edd CC |
330 | // Objects that have been included by this script. |
331 | std::vector<Incremental_input_entry*> objects_; | |
09ec0418 CC |
332 | }; |
333 | ||
334 | // Class for recording input object files. | |
335 | ||
336 | class Incremental_object_entry : public Incremental_input_entry | |
337 | { | |
338 | public: | |
339 | Incremental_object_entry(Stringpool::Key filename_key, Object* obj, | |
cdc29364 CC |
340 | unsigned int arg_serial, Timespec mtime) |
341 | : Incremental_input_entry(filename_key, arg_serial, mtime), obj_(obj), | |
89d8a36b | 342 | is_member_(false), sections_(), groups_() |
0f1c85a6 | 343 | { this->sections_.reserve(obj->shnum()); } |
09ec0418 CC |
344 | |
345 | // Get the object. | |
346 | Object* | |
347 | object() const | |
348 | { return this->obj_; } | |
349 | ||
350 | // Record that this object is an archive member. | |
351 | void | |
352 | set_is_member() | |
353 | { this->is_member_ = true; } | |
354 | ||
355 | // Return true if this object is an archive member. | |
356 | bool | |
357 | is_member() const | |
358 | { return this->is_member_; } | |
359 | ||
360 | // Add an input section. | |
361 | void | |
362 | add_input_section(unsigned int shndx, Stringpool::Key name_key, off_t sh_size) | |
cdc29364 | 363 | { this->sections_.push_back(Input_section(shndx, name_key, sh_size)); } |
09ec0418 CC |
364 | |
365 | // Return the number of input sections in this object. | |
366 | unsigned int | |
367 | get_input_section_count() const | |
368 | { return this->sections_.size(); } | |
369 | ||
cdc29364 CC |
370 | // Return the input section index for the Nth input section. |
371 | Stringpool::Key | |
372 | get_input_section_index(unsigned int n) const | |
373 | { return this->sections_[n].shndx_; } | |
374 | ||
09ec0418 CC |
375 | // Return the stringpool key of the Nth input section. |
376 | Stringpool::Key | |
377 | get_input_section_name_key(unsigned int n) const | |
cdc29364 | 378 | { return this->sections_[n].name_key_; } |
09ec0418 CC |
379 | |
380 | // Return the size of the Nth input section. | |
381 | off_t | |
382 | get_input_section_size(unsigned int n) const | |
cdc29364 | 383 | { return this->sections_[n].sh_size_; } |
09ec0418 | 384 | |
89d8a36b CC |
385 | // Add a kept COMDAT group. |
386 | void | |
387 | add_comdat_group(Stringpool::Key signature_key) | |
388 | { this->groups_.push_back(signature_key); } | |
389 | ||
390 | // Return the number of COMDAT groups. | |
391 | unsigned int | |
392 | get_comdat_group_count() const | |
393 | { return this->groups_.size(); } | |
394 | ||
395 | // Return the stringpool key for the signature of the Nth comdat group. | |
396 | Stringpool::Key | |
397 | get_comdat_signature_key(unsigned int n) const | |
398 | { return this->groups_[n]; } | |
399 | ||
09ec0418 CC |
400 | protected: |
401 | virtual Incremental_input_type | |
402 | do_type() const | |
403 | { | |
404 | return (this->is_member_ | |
405 | ? INCREMENTAL_INPUT_ARCHIVE_MEMBER | |
0f1c85a6 | 406 | : INCREMENTAL_INPUT_OBJECT); |
09ec0418 CC |
407 | } |
408 | ||
409 | // Return a pointer to the derived Incremental_object_entry object. | |
410 | virtual Incremental_object_entry* | |
411 | do_object_entry() | |
412 | { return this; } | |
413 | ||
414 | private: | |
415 | // The object file itself. | |
416 | Object* obj_; | |
417 | ||
418 | // Whether this object is an archive member. | |
419 | bool is_member_; | |
420 | ||
421 | // Input sections. | |
422 | struct Input_section | |
423 | { | |
cdc29364 CC |
424 | Input_section(unsigned int shndx, Stringpool::Key name_key, off_t sh_size) |
425 | : shndx_(shndx), name_key_(name_key), sh_size_(sh_size) | |
426 | { } | |
427 | unsigned int shndx_; | |
428 | Stringpool::Key name_key_; | |
429 | off_t sh_size_; | |
09ec0418 CC |
430 | }; |
431 | std::vector<Input_section> sections_; | |
89d8a36b CC |
432 | |
433 | // COMDAT groups. | |
434 | std::vector<Stringpool::Key> groups_; | |
09ec0418 CC |
435 | }; |
436 | ||
0f1c85a6 CC |
437 | // Class for recording shared library input files. |
438 | ||
439 | class Incremental_dynobj_entry : public Incremental_input_entry | |
440 | { | |
441 | public: | |
442 | Incremental_dynobj_entry(Stringpool::Key filename_key, | |
443 | Stringpool::Key soname_key, Object* obj, | |
444 | unsigned int arg_serial, Timespec mtime) | |
445 | : Incremental_input_entry(filename_key, arg_serial, mtime), | |
446 | soname_key_(soname_key), obj_(obj) | |
447 | { } | |
448 | ||
449 | // Get the object. | |
450 | Object* | |
451 | object() const | |
452 | { return this->obj_; } | |
453 | ||
454 | // Get the stringpool key for the soname. | |
455 | Stringpool::Key | |
456 | get_soname_key() const | |
457 | { return this->soname_key_; } | |
458 | ||
459 | protected: | |
460 | virtual Incremental_input_type | |
461 | do_type() const | |
462 | { return INCREMENTAL_INPUT_SHARED_LIBRARY; } | |
463 | ||
464 | // Return a pointer to the derived Incremental_dynobj_entry object. | |
465 | virtual Incremental_dynobj_entry* | |
466 | do_dynobj_entry() | |
467 | { return this; } | |
468 | ||
469 | private: | |
470 | // Key of the soname string in the section stringtable. | |
471 | Stringpool::Key soname_key_; | |
472 | ||
473 | // The object file itself. | |
474 | Object* obj_; | |
475 | }; | |
476 | ||
09ec0418 CC |
477 | // Class for recording archive library input files. |
478 | ||
479 | class Incremental_archive_entry : public Incremental_input_entry | |
480 | { | |
481 | public: | |
cdc29364 CC |
482 | Incremental_archive_entry(Stringpool::Key filename_key, |
483 | unsigned int arg_serial, Timespec mtime) | |
484 | : Incremental_input_entry(filename_key, arg_serial, mtime), members_(), | |
485 | unused_syms_() | |
09ec0418 CC |
486 | { } |
487 | ||
488 | // Add a member object to the archive. | |
489 | void | |
490 | add_object(Incremental_object_entry* obj_entry) | |
491 | { | |
492 | this->members_.push_back(obj_entry); | |
493 | obj_entry->set_is_member(); | |
494 | } | |
495 | ||
496 | // Add an unused global symbol to the archive. | |
497 | void | |
498 | add_unused_global_symbol(Stringpool::Key symbol_key) | |
499 | { this->unused_syms_.push_back(symbol_key); } | |
500 | ||
501 | // Return the number of member objects included in the link. | |
502 | unsigned int | |
503 | get_member_count() | |
504 | { return this->members_.size(); } | |
505 | ||
506 | // Return the Nth member object. | |
507 | Incremental_object_entry* | |
508 | get_member(unsigned int n) | |
509 | { return this->members_[n]; } | |
510 | ||
511 | // Return the number of unused global symbols in this archive. | |
512 | unsigned int | |
513 | get_unused_global_symbol_count() | |
514 | { return this->unused_syms_.size(); } | |
515 | ||
516 | // Return the Nth unused global symbol. | |
517 | Stringpool::Key | |
518 | get_unused_global_symbol(unsigned int n) | |
519 | { return this->unused_syms_[n]; } | |
520 | ||
521 | protected: | |
522 | virtual Incremental_input_type | |
523 | do_type() const | |
524 | { return INCREMENTAL_INPUT_ARCHIVE; } | |
525 | ||
526 | // Return a pointer to the derived Incremental_archive_entry object. | |
527 | virtual Incremental_archive_entry* | |
528 | do_archive_entry() | |
529 | { return this; } | |
530 | ||
531 | private: | |
532 | // Members of the archive that have been included in the link. | |
533 | std::vector<Incremental_object_entry*> members_; | |
534 | ||
535 | // Unused global symbols from this archive. | |
536 | std::vector<Stringpool::Key> unused_syms_; | |
537 | }; | |
538 | ||
3ce2c28e ILT |
539 | // This class contains the information needed during an incremental |
540 | // build about the inputs necessary to build the .gnu_incremental_inputs. | |
09ec0418 | 541 | |
3ce2c28e ILT |
542 | class Incremental_inputs |
543 | { | |
544 | public: | |
09ec0418 CC |
545 | typedef std::vector<Incremental_input_entry*> Input_list; |
546 | ||
3ce2c28e | 547 | Incremental_inputs() |
09ec0418 CC |
548 | : inputs_(), command_line_(), command_line_key_(0), |
549 | strtab_(new Stringpool()), current_object_(NULL), | |
550 | current_object_entry_(NULL), inputs_section_(NULL), | |
551 | symtab_section_(NULL), relocs_section_(NULL), | |
552 | reloc_count_(0) | |
3ce2c28e | 553 | { } |
09ec0418 | 554 | |
3ce2c28e ILT |
555 | ~Incremental_inputs() { delete this->strtab_; } |
556 | ||
557 | // Record the command line. | |
558 | void | |
559 | report_command_line(int argc, const char* const* argv); | |
072fe7ce | 560 | |
09ec0418 CC |
561 | // Record the initial info for archive file ARCHIVE. |
562 | void | |
cdc29364 CC |
563 | report_archive_begin(Library_base* arch, unsigned int arg_serial, |
564 | Script_info* script_info); | |
09ec0418 CC |
565 | |
566 | // Record the final info for archive file ARCHIVE. | |
567 | void | |
e0c52780 | 568 | report_archive_end(Library_base* arch); |
09ec0418 CC |
569 | |
570 | // Record the info for object file OBJ. If ARCH is not NULL, | |
571 | // attach the object file to the archive. | |
072fe7ce | 572 | void |
cdc29364 CC |
573 | report_object(Object* obj, unsigned int arg_serial, Library_base* arch, |
574 | Script_info* script_info); | |
072fe7ce | 575 | |
09ec0418 | 576 | // Record an input section belonging to object file OBJ. |
072fe7ce | 577 | void |
09ec0418 CC |
578 | report_input_section(Object* obj, unsigned int shndx, const char* name, |
579 | off_t sh_size); | |
072fe7ce | 580 | |
89d8a36b CC |
581 | // Record a kept COMDAT group belonging to object file OBJ. |
582 | void | |
583 | report_comdat_group(Object* obj, const char* name); | |
584 | ||
09ec0418 | 585 | // Record the info for input script SCRIPT. |
072fe7ce | 586 | void |
cdc29364 | 587 | report_script(Script_info* script, unsigned int arg_serial, |
09ec0418 CC |
588 | Timespec mtime); |
589 | ||
590 | // Return the running count of incremental relocations. | |
591 | unsigned int | |
592 | get_reloc_count() const | |
593 | { return this->reloc_count_; } | |
072fe7ce | 594 | |
09ec0418 | 595 | // Update the running count of incremental relocations. |
072fe7ce | 596 | void |
09ec0418 CC |
597 | set_reloc_count(unsigned int count) |
598 | { this->reloc_count_ = count; } | |
072fe7ce | 599 | |
3ce2c28e ILT |
600 | // Prepare for layout. Called from Layout::finalize. |
601 | void | |
602 | finalize(); | |
603 | ||
09ec0418 CC |
604 | // Create the .gnu_incremental_inputs and related sections. |
605 | void | |
606 | create_data_sections(Symbol_table* symtab); | |
607 | ||
608 | // Return the .gnu_incremental_inputs section. | |
3ce2c28e | 609 | Output_section_data* |
09ec0418 CC |
610 | inputs_section() const |
611 | { return this->inputs_section_; } | |
612 | ||
613 | // Return the .gnu_incremental_symtab section. | |
614 | Output_data_space* | |
615 | symtab_section() const | |
616 | { return this->symtab_section_; } | |
617 | ||
618 | // Return the .gnu_incremental_relocs section. | |
619 | Output_data_space* | |
620 | relocs_section() const | |
621 | { return this->relocs_section_; } | |
072fe7ce | 622 | |
0e70b911 CC |
623 | // Return the .gnu_incremental_got_plt section. |
624 | Output_data_space* | |
625 | got_plt_section() const | |
626 | { return this->got_plt_section_; } | |
627 | ||
072fe7ce | 628 | // Return the .gnu_incremental_strtab stringpool. |
3ce2c28e | 629 | Stringpool* |
09ec0418 | 630 | get_stringpool() const |
3ce2c28e ILT |
631 | { return this->strtab_; } |
632 | ||
c4aa1e2d ILT |
633 | // Return the canonical form of the command line, as will be stored in |
634 | // .gnu_incremental_strtab. | |
635 | const std::string& | |
09ec0418 | 636 | command_line() const |
c4aa1e2d ILT |
637 | { return this->command_line_; } |
638 | ||
09ec0418 CC |
639 | // Return the stringpool key of the command line. |
640 | Stringpool::Key | |
641 | command_line_key() const | |
642 | { return this->command_line_key_; } | |
643 | ||
644 | // Return the number of input files. | |
645 | int | |
646 | input_file_count() const | |
647 | { return this->inputs_.size(); } | |
648 | ||
649 | // Return the input files. | |
650 | const Input_list& | |
651 | input_files() const | |
c4aa1e2d ILT |
652 | { return this->inputs_; } |
653 | ||
09ec0418 CC |
654 | // Return the sh_entsize value for the .gnu_incremental_relocs section. |
655 | unsigned int | |
656 | relocs_entsize() const; | |
657 | ||
3ce2c28e | 658 | private: |
09ec0418 CC |
659 | // The list of input files. |
660 | Input_list inputs_; | |
072fe7ce | 661 | |
09ec0418 CC |
662 | // Canonical form of the command line, as will be stored in |
663 | // .gnu_incremental_strtab. | |
664 | std::string command_line_; | |
072fe7ce | 665 | |
09ec0418 CC |
666 | // The key of the command line string in the string pool. |
667 | Stringpool::Key command_line_key_; | |
668 | ||
669 | // The .gnu_incremental_strtab string pool associated with the | |
670 | // .gnu_incremental_inputs. | |
671 | Stringpool* strtab_; | |
672 | ||
673 | // Keep track of the object currently being processed. | |
674 | Object* current_object_; | |
675 | Incremental_object_entry* current_object_entry_; | |
676 | ||
677 | // The .gnu_incremental_inputs section. | |
678 | Output_section_data* inputs_section_; | |
072fe7ce | 679 | |
09ec0418 CC |
680 | // The .gnu_incremental_symtab section. |
681 | Output_data_space* symtab_section_; | |
682 | ||
683 | // The .gnu_incremental_relocs section. | |
684 | Output_data_space* relocs_section_; | |
685 | ||
0e70b911 CC |
686 | // The .gnu_incremental_got_plt section. |
687 | Output_data_space* got_plt_section_; | |
688 | ||
09ec0418 CC |
689 | // Total count of incremental relocations. Updated during Scan_relocs |
690 | // phase at the completion of each object file. | |
691 | unsigned int reloc_count_; | |
692 | }; | |
693 | ||
cdc29364 CC |
694 | // Reader class for global symbol info from an object file entry in |
695 | // the .gnu_incremental_inputs section. | |
696 | ||
697 | template<bool big_endian> | |
698 | class Incremental_global_symbol_reader | |
699 | { | |
700 | private: | |
701 | typedef elfcpp::Swap<32, big_endian> Swap32; | |
702 | ||
703 | public: | |
704 | Incremental_global_symbol_reader(const unsigned char* p) | |
705 | : p_(p) | |
706 | { } | |
707 | ||
708 | unsigned int | |
709 | output_symndx() const | |
710 | { return Swap32::readval(this->p_); } | |
711 | ||
712 | unsigned int | |
713 | shndx() const | |
714 | { return Swap32::readval(this->p_ + 4); } | |
715 | ||
716 | unsigned int | |
717 | next_offset() const | |
718 | { return Swap32::readval(this->p_ + 8); } | |
719 | ||
720 | unsigned int | |
721 | reloc_count() const | |
722 | { return Swap32::readval(this->p_ + 12); } | |
723 | ||
724 | unsigned int | |
725 | reloc_offset() const | |
726 | { return Swap32::readval(this->p_ + 16); } | |
727 | ||
728 | private: | |
729 | // Base address of the symbol entry. | |
730 | const unsigned char* p_; | |
731 | }; | |
732 | ||
09ec0418 CC |
733 | // Reader class for .gnu_incremental_inputs section. |
734 | ||
735 | template<int size, bool big_endian> | |
736 | class Incremental_inputs_reader | |
737 | { | |
738 | private: | |
739 | typedef elfcpp::Swap<size, big_endian> Swap; | |
740 | typedef elfcpp::Swap<16, big_endian> Swap16; | |
741 | typedef elfcpp::Swap<32, big_endian> Swap32; | |
742 | typedef elfcpp::Swap<64, big_endian> Swap64; | |
743 | ||
744 | public: | |
b961d0d7 CC |
745 | Incremental_inputs_reader() |
746 | : p_(NULL), strtab_(NULL, 0), input_file_count_(0) | |
747 | { } | |
748 | ||
749 | Incremental_inputs_reader(const unsigned char* p, | |
750 | const elfcpp::Elf_strtab& strtab) | |
09ec0418 CC |
751 | : p_(p), strtab_(strtab) |
752 | { this->input_file_count_ = Swap32::readval(this->p_ + 4); } | |
753 | ||
754 | // Return the version number. | |
755 | unsigned int | |
756 | version() const | |
757 | { return Swap32::readval(this->p_); } | |
758 | ||
759 | // Return the count of input file entries. | |
760 | unsigned int | |
761 | input_file_count() const | |
762 | { return this->input_file_count_; } | |
763 | ||
764 | // Return the command line. | |
765 | const char* | |
766 | command_line() const | |
072fe7ce | 767 | { |
09ec0418 CC |
768 | unsigned int offset = Swap32::readval(this->p_ + 8); |
769 | return this->get_string(offset); | |
770 | } | |
072fe7ce | 771 | |
09ec0418 CC |
772 | // Reader class for an input file entry and its supplemental info. |
773 | class Incremental_input_entry_reader | |
774 | { | |
775 | public: | |
776 | Incremental_input_entry_reader(const Incremental_inputs_reader* inputs, | |
777 | unsigned int offset) | |
778 | : inputs_(inputs), offset_(offset) | |
779 | { | |
780 | this->info_offset_ = Swap32::readval(inputs->p_ + offset + 4); | |
cdc29364 | 781 | this->flags_ = Swap16::readval(this->inputs_->p_ + offset + 20); |
09ec0418 CC |
782 | } |
783 | ||
784 | // Return the filename. | |
785 | const char* | |
786 | filename() const | |
787 | { | |
788 | unsigned int offset = Swap32::readval(this->inputs_->p_ + this->offset_); | |
789 | return this->inputs_->get_string(offset); | |
790 | } | |
072fe7ce | 791 | |
cdc29364 CC |
792 | // Return the argument serial number. |
793 | unsigned int | |
794 | arg_serial() const | |
795 | { | |
796 | return Swap16::readval(this->inputs_->p_ + this->offset_ + 22); | |
797 | } | |
798 | ||
09ec0418 CC |
799 | // Return the timestamp. |
800 | Timespec | |
801 | get_mtime() const | |
802 | { | |
803 | Timespec t; | |
804 | const unsigned char* p = this->inputs_->p_ + this->offset_ + 8; | |
805 | t.seconds = Swap64::readval(p); | |
806 | t.nanoseconds = Swap32::readval(p+8); | |
807 | return t; | |
808 | } | |
809 | ||
810 | // Return the type of input file. | |
811 | Incremental_input_type | |
812 | type() const | |
cdc29364 CC |
813 | { return static_cast<Incremental_input_type>(this->flags_ & 0xff); } |
814 | ||
815 | // Return TRUE if the file was found in a system directory. | |
816 | bool | |
817 | is_in_system_directory() const | |
818 | { return (this->flags_ & INCREMENTAL_INPUT_IN_SYSTEM_DIR) != 0; } | |
09ec0418 | 819 | |
0f1c85a6 CC |
820 | // Return TRUE if the file was linked with --as-needed. |
821 | bool | |
822 | as_needed() const | |
823 | { return (this->flags_ & INCREMENTAL_INPUT_AS_NEEDED) != 0; } | |
824 | ||
09ec0418 CC |
825 | // Return the input section count -- for objects only. |
826 | unsigned int | |
827 | get_input_section_count() const | |
98fa85cb | 828 | { |
cdc29364 CC |
829 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT |
830 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
09ec0418 CC |
831 | return Swap32::readval(this->inputs_->p_ + this->info_offset_); |
832 | } | |
833 | ||
0f1c85a6 CC |
834 | // Return the soname -- for shared libraries only. |
835 | const char* | |
836 | get_soname() const | |
837 | { | |
838 | gold_assert(this->type() == INCREMENTAL_INPUT_SHARED_LIBRARY); | |
839 | unsigned int offset = Swap32::readval(this->inputs_->p_ | |
840 | + this->info_offset_); | |
841 | return this->inputs_->get_string(offset); | |
842 | } | |
843 | ||
09ec0418 CC |
844 | // Return the offset of the supplemental info for symbol SYMNDX -- |
845 | // for objects only. | |
846 | unsigned int | |
847 | get_symbol_offset(unsigned int symndx) const | |
848 | { | |
cdc29364 CC |
849 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT |
850 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
09ec0418 CC |
851 | |
852 | unsigned int section_count = this->get_input_section_count(); | |
89d8a36b | 853 | return (this->info_offset_ + 28 |
09ec0418 | 854 | + section_count * input_section_entry_size |
cdc29364 | 855 | + symndx * 20); |
09ec0418 CC |
856 | } |
857 | ||
858 | // Return the global symbol count -- for objects & shared libraries only. | |
859 | unsigned int | |
860 | get_global_symbol_count() const | |
861 | { | |
0f1c85a6 CC |
862 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT |
863 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER | |
864 | || this->type() == INCREMENTAL_INPUT_SHARED_LIBRARY); | |
865 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 4); | |
09ec0418 CC |
866 | } |
867 | ||
f0f9babf CC |
868 | // Return the offset of the first local symbol -- for objects only. |
869 | unsigned int | |
870 | get_local_symbol_offset() const | |
871 | { | |
872 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT | |
873 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
874 | ||
875 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 8); | |
876 | } | |
877 | ||
878 | // Return the local symbol count -- for objects only. | |
879 | unsigned int | |
880 | get_local_symbol_count() const | |
881 | { | |
882 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT | |
883 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
884 | ||
885 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 12); | |
886 | } | |
887 | ||
6fa2a40b CC |
888 | // Return the index of the first dynamic relocation -- for objects only. |
889 | unsigned int | |
890 | get_first_dyn_reloc() const | |
891 | { | |
892 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT | |
893 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
894 | ||
895 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 16); | |
896 | } | |
897 | ||
898 | // Return the dynamic relocation count -- for objects only. | |
899 | unsigned int | |
900 | get_dyn_reloc_count() const | |
901 | { | |
902 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT | |
903 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
904 | ||
905 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 20); | |
906 | } | |
907 | ||
89d8a36b CC |
908 | // Return the COMDAT group count -- for objects only. |
909 | unsigned int | |
910 | get_comdat_group_count() const | |
911 | { | |
912 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT | |
913 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
914 | ||
915 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 24); | |
916 | } | |
917 | ||
c7975edd CC |
918 | // Return the object count -- for scripts only. |
919 | unsigned int | |
920 | get_object_count() const | |
921 | { | |
cdc29364 | 922 | gold_assert(this->type() == INCREMENTAL_INPUT_SCRIPT); |
c7975edd CC |
923 | return Swap32::readval(this->inputs_->p_ + this->info_offset_); |
924 | } | |
925 | ||
926 | // Return the input file offset for object N -- for scripts only. | |
927 | unsigned int | |
928 | get_object_offset(unsigned int n) const | |
929 | { | |
cdc29364 | 930 | gold_assert(this->type() == INCREMENTAL_INPUT_SCRIPT); |
c7975edd CC |
931 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ |
932 | + 4 + n * 4); | |
933 | } | |
934 | ||
09ec0418 CC |
935 | // Return the member count -- for archives only. |
936 | unsigned int | |
937 | get_member_count() const | |
938 | { | |
cdc29364 | 939 | gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE); |
09ec0418 CC |
940 | return Swap32::readval(this->inputs_->p_ + this->info_offset_); |
941 | } | |
44453f85 | 942 | |
09ec0418 CC |
943 | // Return the unused symbol count -- for archives only. |
944 | unsigned int | |
945 | get_unused_symbol_count() const | |
946 | { | |
cdc29364 | 947 | gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE); |
09ec0418 CC |
948 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ + 4); |
949 | } | |
44453f85 | 950 | |
09ec0418 CC |
951 | // Return the input file offset for archive member N -- for archives only. |
952 | unsigned int | |
953 | get_member_offset(unsigned int n) const | |
954 | { | |
cdc29364 | 955 | gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE); |
09ec0418 CC |
956 | return Swap32::readval(this->inputs_->p_ + this->info_offset_ |
957 | + 8 + n * 4); | |
958 | } | |
959 | ||
960 | // Return the Nth unused global symbol -- for archives only. | |
961 | const char* | |
962 | get_unused_symbol(unsigned int n) const | |
963 | { | |
cdc29364 | 964 | gold_assert(this->type() == INCREMENTAL_INPUT_ARCHIVE); |
09ec0418 CC |
965 | unsigned int member_count = this->get_member_count(); |
966 | unsigned int offset = Swap32::readval(this->inputs_->p_ | |
967 | + this->info_offset_ + 8 | |
968 | + member_count * 4 | |
969 | + n * 4); | |
970 | return this->inputs_->get_string(offset); | |
971 | } | |
972 | ||
973 | // Information about an input section. | |
974 | struct Input_section_info | |
975 | { | |
976 | const char* name; | |
977 | unsigned int output_shndx; | |
978 | off_t sh_offset; | |
979 | off_t sh_size; | |
98fa85cb | 980 | }; |
072fe7ce | 981 | |
09ec0418 CC |
982 | // Return info about the Nth input section -- for objects only. |
983 | Input_section_info | |
984 | get_input_section(unsigned int n) const | |
985 | { | |
986 | Input_section_info info; | |
987 | const unsigned char* p = (this->inputs_->p_ | |
89d8a36b | 988 | + this->info_offset_ + 28 |
09ec0418 CC |
989 | + n * input_section_entry_size); |
990 | unsigned int name_offset = Swap32::readval(p); | |
991 | info.name = this->inputs_->get_string(name_offset); | |
992 | info.output_shndx = Swap32::readval(p + 4); | |
993 | info.sh_offset = Swap::readval(p + 8); | |
994 | info.sh_size = Swap::readval(p + 8 + size / 8); | |
995 | return info; | |
996 | } | |
997 | ||
09ec0418 | 998 | // Return info about the Nth global symbol -- for objects only. |
cdc29364 CC |
999 | Incremental_global_symbol_reader<big_endian> |
1000 | get_global_symbol_reader(unsigned int n) const | |
09ec0418 | 1001 | { |
cdc29364 CC |
1002 | gold_assert(this->type() == INCREMENTAL_INPUT_OBJECT |
1003 | || this->type() == INCREMENTAL_INPUT_ARCHIVE_MEMBER); | |
09ec0418 CC |
1004 | unsigned int section_count = this->get_input_section_count(); |
1005 | const unsigned char* p = (this->inputs_->p_ | |
89d8a36b | 1006 | + this->info_offset_ + 28 |
09ec0418 | 1007 | + section_count * input_section_entry_size |
cdc29364 CC |
1008 | + n * 20); |
1009 | return Incremental_global_symbol_reader<big_endian>(p); | |
1010 | } | |
1011 | ||
89d8a36b CC |
1012 | // Return the signature of the Nth comdat group -- for objects only. |
1013 | const char* | |
1014 | get_comdat_group_signature(unsigned int n) const | |
1015 | { | |
1016 | unsigned int section_count = this->get_input_section_count(); | |
1017 | unsigned int symbol_count = this->get_global_symbol_count(); | |
1018 | const unsigned char* p = (this->inputs_->p_ | |
1019 | + this->info_offset_ + 28 | |
1020 | + section_count * input_section_entry_size | |
1021 | + symbol_count * 20 | |
1022 | + n * 4); | |
1023 | unsigned int name_offset = Swap32::readval(p); | |
1024 | return this->inputs_->get_string(name_offset); | |
1025 | } | |
1026 | ||
cdc29364 CC |
1027 | // Return the output symbol index for the Nth global symbol -- for shared |
1028 | // libraries only. Sets *IS_DEF to TRUE if the symbol is defined in this | |
26d3c67d CC |
1029 | // input file. Sets *IS_COPY to TRUE if the symbol was copied from this |
1030 | // input file with a COPY relocation. | |
cdc29364 | 1031 | unsigned int |
26d3c67d | 1032 | get_output_symbol_index(unsigned int n, bool* is_def, bool* is_copy) |
cdc29364 CC |
1033 | { |
1034 | gold_assert(this->type() == INCREMENTAL_INPUT_SHARED_LIBRARY); | |
1035 | const unsigned char* p = (this->inputs_->p_ | |
0f1c85a6 | 1036 | + this->info_offset_ + 8 |
cdc29364 CC |
1037 | + n * 4); |
1038 | unsigned int output_symndx = Swap32::readval(p); | |
26d3c67d CC |
1039 | unsigned int flags = output_symndx >> INCREMENTAL_SHLIB_SYM_FLAGS_SHIFT; |
1040 | output_symndx &= ((1U << INCREMENTAL_SHLIB_SYM_FLAGS_SHIFT) - 1); | |
1041 | switch (flags) | |
1042 | { | |
1043 | case INCREMENTAL_SHLIB_SYM_DEF: | |
1044 | *is_def = true; | |
1045 | *is_copy = false; | |
1046 | break; | |
1047 | case INCREMENTAL_SHLIB_SYM_COPY: | |
1048 | *is_def = true; | |
1049 | *is_copy = true; | |
1050 | break; | |
1051 | default: | |
1052 | *is_def = false; | |
1053 | *is_copy = false; | |
1054 | } | |
1055 | return output_symndx; | |
09ec0418 | 1056 | } |
44453f85 | 1057 | |
09ec0418 CC |
1058 | private: |
1059 | // Size of an input section entry. | |
1060 | static const unsigned int input_section_entry_size = 8 + 2 * size / 8; | |
1061 | // The reader instance for the containing section. | |
1062 | const Incremental_inputs_reader* inputs_; | |
cdc29364 CC |
1063 | // The flags, including the type of input file. |
1064 | unsigned int flags_; | |
09ec0418 CC |
1065 | // Section offset to the input file entry. |
1066 | unsigned int offset_; | |
1067 | // Section offset to the supplemental info for the input file. | |
1068 | unsigned int info_offset_; | |
072fe7ce ILT |
1069 | }; |
1070 | ||
cdc29364 CC |
1071 | // Return the offset of an input file entry given its index N. |
1072 | unsigned int | |
1073 | input_file_offset(unsigned int n) const | |
1074 | { | |
1075 | gold_assert(n < this->input_file_count_); | |
1076 | return 16 + n * 24; | |
1077 | } | |
1078 | ||
1079 | // Return the index of an input file entry given its OFFSET. | |
1080 | unsigned int | |
1081 | input_file_index(unsigned int offset) const | |
1082 | { | |
1083 | int n = (offset - 16) / 24; | |
1084 | gold_assert(input_file_offset(n) == offset); | |
1085 | return n; | |
1086 | } | |
1087 | ||
09ec0418 CC |
1088 | // Return a reader for the Nth input file entry. |
1089 | Incremental_input_entry_reader | |
1090 | input_file(unsigned int n) const | |
cdc29364 CC |
1091 | { return Incremental_input_entry_reader(this, this->input_file_offset(n)); } |
1092 | ||
1093 | // Return a reader for the input file entry at OFFSET. | |
1094 | Incremental_input_entry_reader | |
1095 | input_file_at_offset(unsigned int offset) const | |
09ec0418 | 1096 | { |
cdc29364 CC |
1097 | gold_assert(offset < 16 + this->input_file_count_ * 24); |
1098 | return Incremental_input_entry_reader(this, offset); | |
09ec0418 CC |
1099 | } |
1100 | ||
94a3fc8b CC |
1101 | // Return a reader for the global symbol info at OFFSET. |
1102 | Incremental_global_symbol_reader<big_endian> | |
1103 | global_symbol_reader_at_offset(unsigned int offset) const | |
1104 | { | |
1105 | const unsigned char* p = this->p_ + offset; | |
1106 | return Incremental_global_symbol_reader<big_endian>(p); | |
1107 | } | |
1108 | ||
09ec0418 CC |
1109 | private: |
1110 | // Lookup a string in the ELF string table. | |
1111 | const char* get_string(unsigned int offset) const | |
1112 | { | |
1113 | const char* s; | |
1114 | if (this->strtab_.get_c_string(offset, &s)) | |
1115 | return s; | |
1116 | return NULL; | |
1117 | } | |
1118 | ||
1119 | // Base address of the .gnu_incremental_inputs section. | |
1120 | const unsigned char* p_; | |
1121 | // The associated ELF string table. | |
1122 | elfcpp::Elf_strtab strtab_; | |
1123 | // The number of input file entries in this section. | |
1124 | unsigned int input_file_count_; | |
1125 | }; | |
1126 | ||
1127 | // Reader class for the .gnu_incremental_symtab section. | |
072fe7ce | 1128 | |
09ec0418 CC |
1129 | template<bool big_endian> |
1130 | class Incremental_symtab_reader | |
1131 | { | |
1132 | public: | |
b961d0d7 CC |
1133 | Incremental_symtab_reader() |
1134 | : p_(NULL), len_(0) | |
1135 | { } | |
1136 | ||
1137 | Incremental_symtab_reader(const unsigned char* p, off_t len) | |
1138 | : p_(p), len_(len) | |
09ec0418 | 1139 | { } |
44453f85 | 1140 | |
b961d0d7 CC |
1141 | // Return the count of symbols in this section. |
1142 | unsigned int | |
1143 | symbol_count() const | |
1144 | { return static_cast<unsigned int>(this->len_ / 4); } | |
1145 | ||
09ec0418 | 1146 | // Return the list head for symbol table entry N. |
b961d0d7 CC |
1147 | unsigned int |
1148 | get_list_head(unsigned int n) const | |
09ec0418 | 1149 | { return elfcpp::Swap<32, big_endian>::readval(this->p_ + 4 * n); } |
072fe7ce | 1150 | |
09ec0418 CC |
1151 | private: |
1152 | // Base address of the .gnu_incremental_relocs section. | |
1153 | const unsigned char* p_; | |
b961d0d7 CC |
1154 | // Size of the section. |
1155 | off_t len_; | |
09ec0418 | 1156 | }; |
3ce2c28e | 1157 | |
09ec0418 | 1158 | // Reader class for the .gnu_incremental_relocs section. |
c4aa1e2d | 1159 | |
09ec0418 CC |
1160 | template<int size, bool big_endian> |
1161 | class Incremental_relocs_reader | |
1162 | { | |
1163 | private: | |
1164 | // Size of each field. | |
1165 | static const unsigned int field_size = size / 8; | |
c4aa1e2d | 1166 | |
09ec0418 CC |
1167 | public: |
1168 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
1169 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword Addend; | |
1170 | ||
1171 | // Size of each entry. | |
1172 | static const unsigned int reloc_size = 8 + 2 * field_size; | |
1173 | ||
b961d0d7 CC |
1174 | Incremental_relocs_reader() |
1175 | : p_(NULL), len_(0) | |
1176 | { } | |
1177 | ||
1178 | Incremental_relocs_reader(const unsigned char* p, off_t len) | |
1179 | : p_(p), len_(len) | |
09ec0418 CC |
1180 | { } |
1181 | ||
b961d0d7 CC |
1182 | // Return the count of relocations in this section. |
1183 | unsigned int | |
1184 | reloc_count() const | |
1185 | { return static_cast<unsigned int>(this->len_ / reloc_size); } | |
1186 | ||
09ec0418 CC |
1187 | // Return the relocation type for relocation entry at offset OFF. |
1188 | unsigned int | |
0e70b911 | 1189 | get_r_type(unsigned int off) const |
cdc29364 | 1190 | { return elfcpp::Swap<32, big_endian>::readval(this->p_ + off); } |
09ec0418 CC |
1191 | |
1192 | // Return the output section index for relocation entry at offset OFF. | |
1193 | unsigned int | |
0e70b911 | 1194 | get_r_shndx(unsigned int off) const |
cdc29364 | 1195 | { return elfcpp::Swap<32, big_endian>::readval(this->p_ + off + 4); } |
09ec0418 CC |
1196 | |
1197 | // Return the output section offset for relocation entry at offset OFF. | |
1198 | Address | |
0e70b911 | 1199 | get_r_offset(unsigned int off) const |
cdc29364 | 1200 | { return elfcpp::Swap<size, big_endian>::readval(this->p_ + off + 8); } |
09ec0418 CC |
1201 | |
1202 | // Return the addend for relocation entry at offset OFF. | |
1203 | Addend | |
0e70b911 | 1204 | get_r_addend(unsigned int off) const |
09ec0418 CC |
1205 | { |
1206 | return elfcpp::Swap<size, big_endian>::readval(this->p_ + off + 8 | |
1207 | + this->field_size); | |
1208 | } | |
1209 | ||
cdc29364 CC |
1210 | // Return a pointer to the relocation entry at offset OFF. |
1211 | const unsigned char* | |
1212 | data(unsigned int off) const | |
1213 | { return this->p_ + off; } | |
1214 | ||
09ec0418 CC |
1215 | private: |
1216 | // Base address of the .gnu_incremental_relocs section. | |
1217 | const unsigned char* p_; | |
b961d0d7 CC |
1218 | // Size of the section. |
1219 | off_t len_; | |
3ce2c28e ILT |
1220 | }; |
1221 | ||
0e70b911 CC |
1222 | // Reader class for the .gnu_incremental_got_plt section. |
1223 | ||
1224 | template<bool big_endian> | |
1225 | class Incremental_got_plt_reader | |
1226 | { | |
1227 | public: | |
b961d0d7 CC |
1228 | Incremental_got_plt_reader() |
1229 | : p_(NULL), got_count_(0), got_desc_p_(NULL), plt_desc_p_(NULL) | |
1230 | { } | |
1231 | ||
0e70b911 CC |
1232 | Incremental_got_plt_reader(const unsigned char* p) : p_(p) |
1233 | { | |
1234 | this->got_count_ = elfcpp::Swap<32, big_endian>::readval(p); | |
1235 | this->got_desc_p_ = p + 8 + ((this->got_count_ + 3) & ~3); | |
6fa2a40b | 1236 | this->plt_desc_p_ = this->got_desc_p_ + this->got_count_ * 8; |
0e70b911 CC |
1237 | } |
1238 | ||
1239 | // Return the GOT entry count. | |
1240 | unsigned int | |
1241 | get_got_entry_count() const | |
1242 | { | |
1243 | return this->got_count_; | |
1244 | } | |
1245 | ||
1246 | // Return the PLT entry count. | |
1247 | unsigned int | |
1248 | get_plt_entry_count() const | |
1249 | { | |
1250 | return elfcpp::Swap<32, big_endian>::readval(this->p_ + 4); | |
1251 | } | |
1252 | ||
1253 | // Return the GOT type for GOT entry N. | |
1254 | unsigned int | |
1255 | get_got_type(unsigned int n) | |
1256 | { | |
1257 | return this->p_[8 + n]; | |
1258 | } | |
1259 | ||
6fa2a40b CC |
1260 | // Return the symbol index for GOT entry N. |
1261 | unsigned int | |
1262 | get_got_symndx(unsigned int n) | |
1263 | { | |
1264 | return elfcpp::Swap<32, big_endian>::readval(this->got_desc_p_ + n * 8); | |
1265 | } | |
1266 | ||
1267 | // Return the input file index for GOT entry N. | |
0e70b911 | 1268 | unsigned int |
6fa2a40b | 1269 | get_got_input_index(unsigned int n) |
0e70b911 | 1270 | { |
6fa2a40b | 1271 | return elfcpp::Swap<32, big_endian>::readval(this->got_desc_p_ + n * 8 + 4); |
0e70b911 CC |
1272 | } |
1273 | ||
1274 | // Return the PLT descriptor for PLT entry N. | |
1275 | unsigned int | |
1276 | get_plt_desc(unsigned int n) | |
1277 | { | |
1278 | return elfcpp::Swap<32, big_endian>::readval(this->plt_desc_p_ + n * 4); | |
1279 | } | |
1280 | ||
1281 | private: | |
1282 | // Base address of the .gnu_incremental_got_plt section. | |
1283 | const unsigned char* p_; | |
1284 | // GOT entry count. | |
1285 | unsigned int got_count_; | |
1286 | // Base address of the GOT descriptor array. | |
1287 | const unsigned char* got_desc_p_; | |
1288 | // Base address of the PLT descriptor array. | |
1289 | const unsigned char* plt_desc_p_; | |
1290 | }; | |
1291 | ||
b961d0d7 CC |
1292 | // An object representing the ELF file we edit during an incremental build. |
1293 | // Similar to Object or Dynobj, but operates on Output_file and contains | |
1294 | // methods to support incremental updating. This is the abstract parent class | |
1295 | // implemented in Sized_incremental_binary<size, big_endian> for a specific | |
1296 | // endianness and size. | |
1297 | ||
1298 | class Incremental_binary | |
1299 | { | |
1300 | public: | |
1301 | Incremental_binary(Output_file* output, Target* target) | |
cdc29364 CC |
1302 | : input_args_map_(), library_map_(), script_map_(), |
1303 | output_(output), target_(target) | |
b961d0d7 CC |
1304 | { } |
1305 | ||
1306 | virtual | |
1307 | ~Incremental_binary() | |
1308 | { } | |
1309 | ||
1310 | // Check the .gnu_incremental_inputs section to see whether an incremental | |
1311 | // build is possible. | |
1312 | bool | |
cdc29364 CC |
1313 | check_inputs(const Command_line& cmdline, |
1314 | Incremental_inputs* incremental_inputs) | |
1315 | { return this->do_check_inputs(cmdline, incremental_inputs); } | |
b961d0d7 CC |
1316 | |
1317 | // Report an error. | |
1318 | void | |
1319 | error(const char* format, ...) const ATTRIBUTE_PRINTF_2; | |
1320 | ||
cdc29364 CC |
1321 | // Proxy class for a sized Incremental_input_entry_reader. |
1322 | ||
b961d0d7 CC |
1323 | class Input_reader |
1324 | { | |
1325 | public: | |
1326 | Input_reader() | |
1327 | { } | |
1328 | ||
1329 | virtual | |
1330 | ~Input_reader() | |
1331 | { } | |
1332 | ||
1333 | const char* | |
1334 | filename() const | |
1335 | { return this->do_filename(); } | |
1336 | ||
1337 | Timespec | |
1338 | get_mtime() const | |
1339 | { return this->do_get_mtime(); } | |
1340 | ||
1341 | Incremental_input_type | |
1342 | type() const | |
1343 | { return this->do_type(); } | |
1344 | ||
cdc29364 CC |
1345 | unsigned int |
1346 | arg_serial() const | |
1347 | { return this->do_arg_serial(); } | |
1348 | ||
1349 | unsigned int | |
1350 | get_unused_symbol_count() const | |
1351 | { return this->do_get_unused_symbol_count(); } | |
1352 | ||
1353 | const char* | |
1354 | get_unused_symbol(unsigned int n) const | |
1355 | { return this->do_get_unused_symbol(n); } | |
1356 | ||
b961d0d7 CC |
1357 | protected: |
1358 | virtual const char* | |
1359 | do_filename() const = 0; | |
1360 | ||
1361 | virtual Timespec | |
1362 | do_get_mtime() const = 0; | |
1363 | ||
1364 | virtual Incremental_input_type | |
1365 | do_type() const = 0; | |
cdc29364 CC |
1366 | |
1367 | virtual unsigned int | |
1368 | do_arg_serial() const = 0; | |
1369 | ||
1370 | virtual unsigned int | |
1371 | do_get_unused_symbol_count() const = 0; | |
1372 | ||
1373 | virtual const char* | |
1374 | do_get_unused_symbol(unsigned int n) const = 0; | |
b961d0d7 CC |
1375 | }; |
1376 | ||
cdc29364 CC |
1377 | // Return the number of input files. |
1378 | unsigned int | |
1379 | input_file_count() const | |
1380 | { return this->do_input_file_count(); } | |
1381 | ||
1382 | // Return an Input_reader for input file N. | |
1383 | const Input_reader* | |
1384 | get_input_reader(unsigned int n) const | |
1385 | { return this->do_get_input_reader(n); } | |
1386 | ||
1387 | // Return TRUE if the input file N has changed since the last link. | |
1388 | bool | |
1389 | file_has_changed(unsigned int n) const | |
1390 | { return this->do_file_has_changed(n); } | |
1391 | ||
1392 | // Return the Input_argument for input file N. Returns NULL if | |
1393 | // the Input_argument is not available. | |
1394 | const Input_argument* | |
1395 | get_input_argument(unsigned int n) const | |
1396 | { | |
1397 | const Input_reader* input_file = this->do_get_input_reader(n); | |
1398 | unsigned int arg_serial = input_file->arg_serial(); | |
1399 | if (arg_serial == 0 || arg_serial > this->input_args_map_.size()) | |
1400 | return NULL; | |
1401 | return this->input_args_map_[arg_serial - 1]; | |
1402 | } | |
1403 | ||
1404 | // Return an Incremental_library for the given input file. | |
1405 | Incremental_library* | |
1406 | get_library(unsigned int n) | |
1407 | { return this->library_map_[n]; } | |
1408 | ||
1409 | // Return a Script_info for the given input file. | |
1410 | Script_info* | |
1411 | get_script_info(unsigned int n) | |
1412 | { return this->script_map_[n]; } | |
1413 | ||
1414 | // Initialize the layout of the output file based on the existing | |
1415 | // output file. | |
1416 | void | |
1417 | init_layout(Layout* layout) | |
1418 | { this->do_init_layout(layout); } | |
1419 | ||
1420 | // Mark regions of the input file that must be kept unchanged. | |
1421 | void | |
1422 | reserve_layout(unsigned int input_file_index) | |
1423 | { this->do_reserve_layout(input_file_index); } | |
b961d0d7 | 1424 | |
4829d394 CC |
1425 | // Process the GOT and PLT entries from the existing output file. |
1426 | void | |
1427 | process_got_plt(Symbol_table* symtab, Layout* layout) | |
1428 | { this->do_process_got_plt(symtab, layout); } | |
1429 | ||
26d3c67d CC |
1430 | // Emit COPY relocations from the existing output file. |
1431 | void | |
1432 | emit_copy_relocs(Symbol_table* symtab) | |
1433 | { this->do_emit_copy_relocs(symtab); } | |
1434 | ||
94a3fc8b CC |
1435 | // Apply incremental relocations for symbols whose values have changed. |
1436 | void | |
1437 | apply_incremental_relocs(const Symbol_table* symtab, Layout* layout, | |
1438 | Output_file* of) | |
1439 | { this->do_apply_incremental_relocs(symtab, layout, of); } | |
1440 | ||
b961d0d7 CC |
1441 | // Functions and types for the elfcpp::Elf_file interface. This |
1442 | // permit us to use Incremental_binary as the File template parameter for | |
1443 | // elfcpp::Elf_file. | |
1444 | ||
1445 | // The View class is returned by view. It must support a single | |
1446 | // method, data(). This is trivial, because Output_file::get_output_view | |
1447 | // does what we need. | |
1448 | class View | |
1449 | { | |
1450 | public: | |
1451 | View(const unsigned char* p) | |
1452 | : p_(p) | |
1453 | { } | |
1454 | ||
1455 | const unsigned char* | |
1456 | data() const | |
1457 | { return this->p_; } | |
1458 | ||
1459 | private: | |
1460 | const unsigned char* p_; | |
1461 | }; | |
1462 | ||
1463 | // Return a View. | |
1464 | View | |
1465 | view(off_t file_offset, section_size_type data_size) | |
1466 | { return View(this->output_->get_input_view(file_offset, data_size)); } | |
1467 | ||
1468 | // A location in the file. | |
1469 | struct Location | |
1470 | { | |
1471 | off_t file_offset; | |
1472 | off_t data_size; | |
1473 | ||
1474 | Location(off_t fo, section_size_type ds) | |
1475 | : file_offset(fo), data_size(ds) | |
1476 | { } | |
1477 | ||
1478 | Location() | |
1479 | : file_offset(0), data_size(0) | |
1480 | { } | |
1481 | }; | |
1482 | ||
1483 | // Get a View given a Location. | |
1484 | View | |
1485 | view(Location loc) | |
1486 | { return View(this->view(loc.file_offset, loc.data_size)); } | |
1487 | ||
cdc29364 CC |
1488 | // Return the Output_file. |
1489 | Output_file* | |
1490 | output_file() | |
1491 | { return this->output_; } | |
1492 | ||
b961d0d7 CC |
1493 | protected: |
1494 | // Check the .gnu_incremental_inputs section to see whether an incremental | |
1495 | // build is possible. | |
1496 | virtual bool | |
cdc29364 CC |
1497 | do_check_inputs(const Command_line& cmdline, |
1498 | Incremental_inputs* incremental_inputs) = 0; | |
b961d0d7 | 1499 | |
cdc29364 | 1500 | // Return TRUE if input file N has changed since the last incremental link. |
b961d0d7 | 1501 | virtual bool |
cdc29364 CC |
1502 | do_file_has_changed(unsigned int n) const = 0; |
1503 | ||
1504 | // Initialize the layout of the output file based on the existing | |
1505 | // output file. | |
1506 | virtual void | |
1507 | do_init_layout(Layout* layout) = 0; | |
1508 | ||
1509 | // Mark regions of the input file that must be kept unchanged. | |
1510 | virtual void | |
1511 | do_reserve_layout(unsigned int input_file_index) = 0; | |
1512 | ||
4829d394 CC |
1513 | // Process the GOT and PLT entries from the existing output file. |
1514 | virtual void | |
1515 | do_process_got_plt(Symbol_table* symtab, Layout* layout) = 0; | |
1516 | ||
26d3c67d CC |
1517 | // Emit COPY relocations from the existing output file. |
1518 | virtual void | |
1519 | do_emit_copy_relocs(Symbol_table* symtab) = 0; | |
1520 | ||
94a3fc8b CC |
1521 | // Apply incremental relocations for symbols whose values have changed. |
1522 | virtual void | |
1523 | do_apply_incremental_relocs(const Symbol_table*, Layout*, Output_file*) = 0; | |
1524 | ||
cdc29364 CC |
1525 | virtual unsigned int |
1526 | do_input_file_count() const = 0; | |
b961d0d7 | 1527 | |
cdc29364 CC |
1528 | virtual const Input_reader* |
1529 | do_get_input_reader(unsigned int) const = 0; | |
1530 | ||
1531 | // Map from input file index to Input_argument. | |
1532 | std::vector<const Input_argument*> input_args_map_; | |
1533 | // Map from an input file index to an Incremental_library. | |
1534 | std::vector<Incremental_library*> library_map_; | |
1535 | // Map from an input file index to a Script_info. | |
1536 | std::vector<Script_info*> script_map_; | |
b961d0d7 CC |
1537 | |
1538 | private: | |
1539 | // Edited output file object. | |
1540 | Output_file* output_; | |
1541 | // Target of the output file. | |
1542 | Target* target_; | |
1543 | }; | |
1544 | ||
6fa2a40b CC |
1545 | template<int size, bool big_endian> |
1546 | class Sized_relobj_incr; | |
1547 | ||
b961d0d7 CC |
1548 | template<int size, bool big_endian> |
1549 | class Sized_incremental_binary : public Incremental_binary | |
1550 | { | |
1551 | public: | |
1552 | Sized_incremental_binary(Output_file* output, | |
1553 | const elfcpp::Ehdr<size, big_endian>& ehdr, | |
1554 | Target* target) | |
1555 | : Incremental_binary(output, target), elf_file_(this, ehdr), | |
26d3c67d CC |
1556 | input_objects_(), section_map_(), symbol_map_(), copy_relocs_(), |
1557 | main_symtab_loc_(), main_strtab_loc_(), has_incremental_info_(false), | |
1558 | inputs_reader_(), symtab_reader_(), relocs_reader_(), got_plt_reader_(), | |
cdc29364 | 1559 | input_entry_readers_() |
b961d0d7 CC |
1560 | { this->setup_readers(); } |
1561 | ||
1562 | // Returns TRUE if the file contains incremental info. | |
1563 | bool | |
1564 | has_incremental_info() const | |
1565 | { return this->has_incremental_info_; } | |
1566 | ||
6fa2a40b | 1567 | // Record a pointer to the object for input file N. |
4829d394 | 1568 | void |
6fa2a40b CC |
1569 | set_input_object(unsigned int n, |
1570 | Sized_relobj_incr<size, big_endian>* obj) | |
1571 | { this->input_objects_[n] = obj; } | |
4829d394 | 1572 | |
6fa2a40b CC |
1573 | // Return a pointer to the object for input file N. |
1574 | Sized_relobj_incr<size, big_endian>* | |
1575 | input_object(unsigned int n) const | |
4829d394 | 1576 | { |
6fa2a40b CC |
1577 | gold_assert(n < this->input_objects_.size()); |
1578 | return this->input_objects_[n]; | |
4829d394 CC |
1579 | } |
1580 | ||
cdc29364 CC |
1581 | // Return the Output_section for section index SHNDX. |
1582 | Output_section* | |
1583 | output_section(unsigned int shndx) | |
1584 | { return this->section_map_[shndx]; } | |
1585 | ||
4829d394 | 1586 | // Map a symbol table entry from the base file to the output symbol table. |
94a3fc8b CC |
1587 | // SYMNDX is relative to the first forced-local or global symbol in the |
1588 | // input file symbol table. | |
1589 | void | |
1590 | add_global_symbol(unsigned int symndx, Symbol* gsym) | |
1591 | { this->symbol_map_[symndx] = gsym; } | |
1592 | ||
4829d394 | 1593 | // Map a symbol table entry from the base file to the output symbol table. |
94a3fc8b CC |
1594 | // SYMNDX is relative to the first forced-local or global symbol in the |
1595 | // input file symbol table. | |
1596 | Symbol* | |
1597 | global_symbol(unsigned int symndx) const | |
1598 | { return this->symbol_map_[symndx]; } | |
1599 | ||
26d3c67d CC |
1600 | // Add a COPY relocation for a global symbol. |
1601 | void | |
1602 | add_copy_reloc(Symbol* gsym, Output_section* os, off_t offset) | |
1603 | { this->copy_relocs_.push_back(Copy_reloc(gsym, os, offset)); } | |
1604 | ||
b961d0d7 CC |
1605 | // Readers for the incremental info sections. |
1606 | ||
cdc29364 | 1607 | const Incremental_inputs_reader<size, big_endian>& |
b961d0d7 CC |
1608 | inputs_reader() const |
1609 | { return this->inputs_reader_; } | |
1610 | ||
cdc29364 | 1611 | const Incremental_symtab_reader<big_endian>& |
b961d0d7 CC |
1612 | symtab_reader() const |
1613 | { return this->symtab_reader_; } | |
1614 | ||
cdc29364 | 1615 | const Incremental_relocs_reader<size, big_endian>& |
b961d0d7 CC |
1616 | relocs_reader() const |
1617 | { return this->relocs_reader_; } | |
1618 | ||
cdc29364 | 1619 | const Incremental_got_plt_reader<big_endian>& |
b961d0d7 CC |
1620 | got_plt_reader() const |
1621 | { return this->got_plt_reader_; } | |
1622 | ||
cdc29364 CC |
1623 | void |
1624 | get_symtab_view(View* symtab_view, unsigned int* sym_count, | |
1625 | elfcpp::Elf_strtab* strtab); | |
1626 | ||
b961d0d7 | 1627 | protected: |
cdc29364 CC |
1628 | typedef Incremental_inputs_reader<size, big_endian> Inputs_reader; |
1629 | typedef typename Inputs_reader::Incremental_input_entry_reader | |
1630 | Input_entry_reader; | |
1631 | ||
b961d0d7 | 1632 | virtual bool |
cdc29364 CC |
1633 | do_check_inputs(const Command_line& cmdline, |
1634 | Incremental_inputs* incremental_inputs); | |
b961d0d7 | 1635 | |
cdc29364 | 1636 | // Return TRUE if input file N has changed since the last incremental link. |
b961d0d7 | 1637 | virtual bool |
cdc29364 CC |
1638 | do_file_has_changed(unsigned int n) const; |
1639 | ||
1640 | // Initialize the layout of the output file based on the existing | |
1641 | // output file. | |
1642 | virtual void | |
1643 | do_init_layout(Layout* layout); | |
1644 | ||
1645 | // Mark regions of the input file that must be kept unchanged. | |
1646 | virtual void | |
1647 | do_reserve_layout(unsigned int input_file_index); | |
1648 | ||
4829d394 CC |
1649 | // Process the GOT and PLT entries from the existing output file. |
1650 | virtual void | |
1651 | do_process_got_plt(Symbol_table* symtab, Layout* layout); | |
1652 | ||
26d3c67d CC |
1653 | // Emit COPY relocations from the existing output file. |
1654 | virtual void | |
1655 | do_emit_copy_relocs(Symbol_table* symtab); | |
1656 | ||
94a3fc8b CC |
1657 | // Apply incremental relocations for symbols whose values have changed. |
1658 | virtual void | |
1659 | do_apply_incremental_relocs(const Symbol_table* symtab, Layout* layout, | |
1660 | Output_file* of); | |
1661 | ||
cdc29364 | 1662 | // Proxy class for a sized Incremental_input_entry_reader. |
b961d0d7 | 1663 | |
b961d0d7 CC |
1664 | class Sized_input_reader : public Input_reader |
1665 | { | |
1666 | public: | |
b961d0d7 CC |
1667 | Sized_input_reader(Input_entry_reader r) |
1668 | : Input_reader(), reader_(r) | |
1669 | { } | |
1670 | ||
1671 | virtual | |
1672 | ~Sized_input_reader() | |
1673 | { } | |
1674 | ||
1675 | private: | |
1676 | const char* | |
1677 | do_filename() const | |
1678 | { return this->reader_.filename(); } | |
1679 | ||
1680 | Timespec | |
1681 | do_get_mtime() const | |
1682 | { return this->reader_.get_mtime(); } | |
1683 | ||
1684 | Incremental_input_type | |
1685 | do_type() const | |
1686 | { return this->reader_.type(); } | |
1687 | ||
cdc29364 CC |
1688 | unsigned int |
1689 | do_arg_serial() const | |
1690 | { return this->reader_.arg_serial(); } | |
1691 | ||
1692 | unsigned int | |
1693 | do_get_unused_symbol_count() const | |
1694 | { return this->reader_.get_unused_symbol_count(); } | |
1695 | ||
1696 | const char* | |
1697 | do_get_unused_symbol(unsigned int n) const | |
1698 | { return this->reader_.get_unused_symbol(n); } | |
1699 | ||
b961d0d7 CC |
1700 | Input_entry_reader reader_; |
1701 | }; | |
1702 | ||
cdc29364 CC |
1703 | virtual unsigned int |
1704 | do_input_file_count() const | |
1705 | { return this->inputs_reader_.input_file_count(); } | |
1706 | ||
1707 | virtual const Input_reader* | |
1708 | do_get_input_reader(unsigned int n) const | |
1709 | { | |
1710 | gold_assert(n < this->input_entry_readers_.size()); | |
1711 | return &this->input_entry_readers_[n]; | |
1712 | } | |
b961d0d7 CC |
1713 | |
1714 | private: | |
26d3c67d CC |
1715 | // List of symbols that need COPY relocations. |
1716 | struct Copy_reloc | |
1717 | { | |
1718 | Copy_reloc(Symbol* sym, Output_section* os, off_t off) | |
1719 | : symbol(sym), output_section(os), offset(off) | |
1720 | { } | |
1721 | ||
1722 | // The global symbol to copy. | |
1723 | Symbol* symbol; | |
1724 | // The output section into which the symbol was copied. | |
1725 | Output_section* output_section; | |
1726 | // The offset within that output section. | |
1727 | off_t offset; | |
1728 | }; | |
1729 | typedef std::vector<Copy_reloc> Copy_relocs; | |
1730 | ||
b961d0d7 CC |
1731 | bool |
1732 | find_incremental_inputs_sections(unsigned int* p_inputs_shndx, | |
1733 | unsigned int* p_symtab_shndx, | |
1734 | unsigned int* p_relocs_shndx, | |
1735 | unsigned int* p_got_plt_shndx, | |
1736 | unsigned int* p_strtab_shndx); | |
1737 | ||
1738 | void | |
1739 | setup_readers(); | |
1740 | ||
1741 | // Output as an ELF file. | |
1742 | elfcpp::Elf_file<size, big_endian, Incremental_binary> elf_file_; | |
1743 | ||
6fa2a40b CC |
1744 | // Vector of pointers to the input objects for the unchanged files. |
1745 | // For replaced files, the corresponding pointer is NULL. | |
1746 | std::vector<Sized_relobj_incr<size, big_endian>*> input_objects_; | |
4829d394 | 1747 | |
cdc29364 CC |
1748 | // Map section index to an Output_section in the updated layout. |
1749 | std::vector<Output_section*> section_map_; | |
1750 | ||
94a3fc8b CC |
1751 | // Map global symbols from the input file to the symbol table. |
1752 | std::vector<Symbol*> symbol_map_; | |
1753 | ||
26d3c67d CC |
1754 | // List of symbols that need COPY relocations. |
1755 | Copy_relocs copy_relocs_; | |
1756 | ||
4829d394 CC |
1757 | // Locations of the main symbol table and symbol string table. |
1758 | Location main_symtab_loc_; | |
1759 | Location main_strtab_loc_; | |
1760 | ||
b961d0d7 CC |
1761 | // Readers for the incremental info sections. |
1762 | bool has_incremental_info_; | |
1763 | Incremental_inputs_reader<size, big_endian> inputs_reader_; | |
1764 | Incremental_symtab_reader<big_endian> symtab_reader_; | |
1765 | Incremental_relocs_reader<size, big_endian> relocs_reader_; | |
1766 | Incremental_got_plt_reader<big_endian> got_plt_reader_; | |
cdc29364 CC |
1767 | std::vector<Sized_input_reader> input_entry_readers_; |
1768 | }; | |
1769 | ||
1770 | // An incremental Relobj. This class represents a relocatable object | |
1771 | // that has not changed since the last incremental link, and whose contents | |
1772 | // can be used directly from the base file. | |
1773 | ||
1774 | template<int size, bool big_endian> | |
6fa2a40b | 1775 | class Sized_relobj_incr : public Sized_relobj<size, big_endian> |
cdc29364 CC |
1776 | { |
1777 | public: | |
1778 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
6fa2a40b | 1779 | typedef typename Sized_relobj<size, big_endian>::Symbols Symbols; |
cdc29364 | 1780 | |
6fa2a40b | 1781 | Sized_relobj_incr(const std::string& name, |
cdc29364 CC |
1782 | Sized_incremental_binary<size, big_endian>* ibase, |
1783 | unsigned int input_file_index); | |
1784 | ||
cdc29364 | 1785 | private: |
f0f9babf | 1786 | // For convenience. |
6fa2a40b | 1787 | typedef Sized_relobj_incr<size, big_endian> This; |
f0f9babf CC |
1788 | static const int sym_size = elfcpp::Elf_sizes<size>::sym_size; |
1789 | ||
6fa2a40b | 1790 | typedef typename Sized_relobj<size, big_endian>::Output_sections |
cdc29364 CC |
1791 | Output_sections; |
1792 | typedef Incremental_inputs_reader<size, big_endian> Inputs_reader; | |
1793 | typedef typename Inputs_reader::Incremental_input_entry_reader | |
1794 | Input_entry_reader; | |
1795 | ||
f0f9babf CC |
1796 | // A local symbol. |
1797 | struct Local_symbol | |
1798 | { | |
1799 | Local_symbol(const char* name_, Address value_, unsigned int size_, | |
1800 | unsigned int shndx_, unsigned int type_, | |
1801 | bool needs_dynsym_entry_) | |
1802 | : st_value(value_), name(name_), st_size(size_), st_shndx(shndx_), | |
1803 | st_type(type_), output_dynsym_index(0), | |
1804 | needs_dynsym_entry(needs_dynsym_entry_) | |
1805 | { } | |
1806 | // The symbol value. | |
1807 | Address st_value; | |
1808 | // The symbol name. This points to the stringpool entry. | |
1809 | const char* name; | |
1810 | // The symbol size. | |
1811 | unsigned int st_size; | |
1812 | // The output section index. | |
1813 | unsigned int st_shndx : 28; | |
1814 | // The symbol type. | |
1815 | unsigned int st_type : 4; | |
1816 | // The index of the symbol in the output dynamic symbol table. | |
1817 | unsigned int output_dynsym_index : 31; | |
1818 | // TRUE if the symbol needs to appear in the dynamic symbol table. | |
1819 | unsigned int needs_dynsym_entry : 1; | |
1820 | }; | |
1821 | ||
cdc29364 CC |
1822 | // Return TRUE if this is an incremental (unchanged) input file. |
1823 | bool | |
1824 | do_is_incremental() const | |
1825 | { return true; } | |
1826 | ||
1827 | // Return the last modified time of the file. | |
1828 | Timespec | |
1829 | do_get_mtime() | |
1830 | { return this->input_reader_.get_mtime(); } | |
1831 | ||
1832 | // Read the symbols. | |
1833 | void | |
1834 | do_read_symbols(Read_symbols_data*); | |
1835 | ||
1836 | // Lay out the input sections. | |
1837 | void | |
1838 | do_layout(Symbol_table*, Layout*, Read_symbols_data*); | |
1839 | ||
1840 | // Layout sections whose layout was deferred while waiting for | |
1841 | // input files from a plugin. | |
1842 | void | |
1843 | do_layout_deferred_sections(Layout*); | |
1844 | ||
1845 | // Add the symbols to the symbol table. | |
1846 | void | |
1847 | do_add_symbols(Symbol_table*, Read_symbols_data*, Layout*); | |
1848 | ||
1849 | Archive::Should_include | |
1850 | do_should_include_member(Symbol_table* symtab, Layout*, Read_symbols_data*, | |
1851 | std::string* why); | |
1852 | ||
1853 | // Iterate over global symbols, calling a visitor class V for each. | |
1854 | void | |
1855 | do_for_all_global_symbols(Read_symbols_data* sd, | |
1856 | Library_base::Symbol_visitor_base* v); | |
1857 | ||
cdc29364 CC |
1858 | // Get the size of a section. |
1859 | uint64_t | |
1860 | do_section_size(unsigned int shndx); | |
1861 | ||
1862 | // Get the name of a section. | |
1863 | std::string | |
1864 | do_section_name(unsigned int shndx); | |
1865 | ||
1866 | // Return a view of the contents of a section. | |
1867 | Object::Location | |
1868 | do_section_contents(unsigned int shndx); | |
1869 | ||
1870 | // Return section flags. | |
1871 | uint64_t | |
1872 | do_section_flags(unsigned int shndx); | |
1873 | ||
1874 | // Return section entsize. | |
1875 | uint64_t | |
1876 | do_section_entsize(unsigned int shndx); | |
1877 | ||
1878 | // Return section address. | |
1879 | uint64_t | |
1880 | do_section_address(unsigned int shndx); | |
1881 | ||
1882 | // Return section type. | |
1883 | unsigned int | |
1884 | do_section_type(unsigned int shndx); | |
1885 | ||
1886 | // Return the section link field. | |
1887 | unsigned int | |
1888 | do_section_link(unsigned int shndx); | |
1889 | ||
1890 | // Return the section link field. | |
1891 | unsigned int | |
1892 | do_section_info(unsigned int shndx); | |
b961d0d7 | 1893 | |
cdc29364 CC |
1894 | // Return the section alignment. |
1895 | uint64_t | |
1896 | do_section_addralign(unsigned int shndx); | |
1897 | ||
1898 | // Return the Xindex structure to use. | |
1899 | Xindex* | |
1900 | do_initialize_xindex(); | |
1901 | ||
1902 | // Get symbol counts. | |
1903 | void | |
1904 | do_get_global_symbol_counts(const Symbol_table*, size_t*, size_t*) const; | |
1905 | ||
1906 | // Get global symbols. | |
1907 | const Symbols* | |
1908 | do_get_global_symbols() const | |
1909 | { return &this->symbols_; } | |
1910 | ||
1911 | // Return the number of local symbols. | |
1912 | unsigned int | |
1913 | do_local_symbol_count() const | |
f0f9babf CC |
1914 | { return this->local_symbol_count_; } |
1915 | ||
1916 | // Return the number of local symbols in the output symbol table. | |
1917 | unsigned int | |
1918 | do_output_local_symbol_count() const | |
1919 | { return this->local_symbol_count_; } | |
1920 | ||
1921 | // Return the file offset for local symbols in the output symbol table. | |
1922 | off_t | |
1923 | do_local_symbol_offset() const | |
1924 | { return this->local_symbol_offset_; } | |
cdc29364 CC |
1925 | |
1926 | // Read the relocs. | |
1927 | void | |
1928 | do_read_relocs(Read_relocs_data*); | |
1929 | ||
1930 | // Process the relocs to find list of referenced sections. Used only | |
1931 | // during garbage collection. | |
1932 | void | |
1933 | do_gc_process_relocs(Symbol_table*, Layout*, Read_relocs_data*); | |
1934 | ||
1935 | // Scan the relocs and adjust the symbol table. | |
1936 | void | |
1937 | do_scan_relocs(Symbol_table*, Layout*, Read_relocs_data*); | |
1938 | ||
1939 | // Count the local symbols. | |
1940 | void | |
1941 | do_count_local_symbols(Stringpool_template<char>*, | |
1942 | Stringpool_template<char>*); | |
1943 | ||
1944 | // Finalize the local symbols. | |
1945 | unsigned int | |
1946 | do_finalize_local_symbols(unsigned int, off_t, Symbol_table*); | |
1947 | ||
1948 | // Set the offset where local dynamic symbol information will be stored. | |
1949 | unsigned int | |
1950 | do_set_local_dynsym_indexes(unsigned int); | |
1951 | ||
1952 | // Set the offset where local dynamic symbol information will be stored. | |
1953 | unsigned int | |
1954 | do_set_local_dynsym_offset(off_t); | |
1955 | ||
1956 | // Relocate the input sections and write out the local symbols. | |
1957 | void | |
1958 | do_relocate(const Symbol_table* symtab, const Layout*, Output_file* of); | |
1959 | ||
1960 | // Set the offset of a section. | |
1961 | void | |
1962 | do_set_section_offset(unsigned int shndx, uint64_t off); | |
1963 | ||
1964 | // The Incremental_binary base file. | |
1965 | Sized_incremental_binary<size, big_endian>* ibase_; | |
1966 | // The index of the object in the input file list. | |
1967 | unsigned int input_file_index_; | |
1968 | // The reader for the input file. | |
1969 | Input_entry_reader input_reader_; | |
f0f9babf CC |
1970 | // The number of local symbols. |
1971 | unsigned int local_symbol_count_; | |
1972 | // The number of local symbols which go into the output file's dynamic | |
1973 | // symbol table. | |
1974 | unsigned int output_local_dynsym_count_; | |
1975 | // This starting symbol index in the output symbol table. | |
1976 | unsigned int local_symbol_index_; | |
1977 | // The file offset for local symbols in the output symbol table. | |
1978 | unsigned int local_symbol_offset_; | |
1979 | // The file offset for local symbols in the output symbol table. | |
1980 | unsigned int local_dynsym_offset_; | |
cdc29364 CC |
1981 | // The entries in the symbol table for the external symbols. |
1982 | Symbols symbols_; | |
cdc29364 CC |
1983 | // The offset of the first incremental relocation for this object. |
1984 | unsigned int incr_reloc_offset_; | |
1985 | // The number of incremental relocations for this object. | |
1986 | unsigned int incr_reloc_count_; | |
1987 | // The index of the first incremental relocation for this object in the | |
1988 | // updated output file. | |
1989 | unsigned int incr_reloc_output_index_; | |
1990 | // A copy of the incremental relocations from this object. | |
1991 | unsigned char* incr_relocs_; | |
f0f9babf CC |
1992 | // The local symbols. |
1993 | std::vector<Local_symbol> local_symbols_; | |
cdc29364 CC |
1994 | }; |
1995 | ||
1996 | // An incremental Dynobj. This class represents a shared object that has | |
1997 | // not changed since the last incremental link, and whose contents can be | |
1998 | // used directly from the base file. | |
1999 | ||
2000 | template<int size, bool big_endian> | |
2001 | class Sized_incr_dynobj : public Dynobj | |
2002 | { | |
2003 | public: | |
2004 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
2005 | ||
2006 | static const Address invalid_address = static_cast<Address>(0) - 1; | |
2007 | ||
2008 | Sized_incr_dynobj(const std::string& name, | |
2009 | Sized_incremental_binary<size, big_endian>* ibase, | |
2010 | unsigned int input_file_index); | |
2011 | ||
2012 | private: | |
2013 | typedef Incremental_inputs_reader<size, big_endian> Inputs_reader; | |
2014 | typedef typename Inputs_reader::Incremental_input_entry_reader | |
2015 | Input_entry_reader; | |
2016 | ||
2017 | // Return TRUE if this is an incremental (unchanged) input file. | |
2018 | bool | |
2019 | do_is_incremental() const | |
2020 | { return true; } | |
2021 | ||
2022 | // Return the last modified time of the file. | |
2023 | Timespec | |
2024 | do_get_mtime() | |
2025 | { return this->input_reader_.get_mtime(); } | |
2026 | ||
2027 | // Read the symbols. | |
2028 | void | |
2029 | do_read_symbols(Read_symbols_data*); | |
2030 | ||
2031 | // Lay out the input sections. | |
2032 | void | |
2033 | do_layout(Symbol_table*, Layout*, Read_symbols_data*); | |
2034 | ||
2035 | // Add the symbols to the symbol table. | |
2036 | void | |
2037 | do_add_symbols(Symbol_table*, Read_symbols_data*, Layout*); | |
2038 | ||
2039 | Archive::Should_include | |
2040 | do_should_include_member(Symbol_table* symtab, Layout*, Read_symbols_data*, | |
2041 | std::string* why); | |
2042 | ||
2043 | // Iterate over global symbols, calling a visitor class V for each. | |
2044 | void | |
2045 | do_for_all_global_symbols(Read_symbols_data* sd, | |
2046 | Library_base::Symbol_visitor_base* v); | |
2047 | ||
2048 | // Iterate over local symbols, calling a visitor class V for each GOT offset | |
2049 | // associated with a local symbol. | |
2050 | void | |
2051 | do_for_all_local_got_entries(Got_offset_list::Visitor* v) const; | |
2052 | ||
2053 | // Get the size of a section. | |
2054 | uint64_t | |
2055 | do_section_size(unsigned int shndx); | |
2056 | ||
2057 | // Get the name of a section. | |
2058 | std::string | |
2059 | do_section_name(unsigned int shndx); | |
2060 | ||
2061 | // Return a view of the contents of a section. | |
2062 | Object::Location | |
2063 | do_section_contents(unsigned int shndx); | |
2064 | ||
2065 | // Return section flags. | |
2066 | uint64_t | |
2067 | do_section_flags(unsigned int shndx); | |
2068 | ||
2069 | // Return section entsize. | |
2070 | uint64_t | |
2071 | do_section_entsize(unsigned int shndx); | |
2072 | ||
2073 | // Return section address. | |
2074 | uint64_t | |
2075 | do_section_address(unsigned int shndx); | |
2076 | ||
2077 | // Return section type. | |
2078 | unsigned int | |
2079 | do_section_type(unsigned int shndx); | |
2080 | ||
2081 | // Return the section link field. | |
2082 | unsigned int | |
2083 | do_section_link(unsigned int shndx); | |
2084 | ||
2085 | // Return the section link field. | |
2086 | unsigned int | |
2087 | do_section_info(unsigned int shndx); | |
2088 | ||
2089 | // Return the section alignment. | |
2090 | uint64_t | |
2091 | do_section_addralign(unsigned int shndx); | |
2092 | ||
2093 | // Return the Xindex structure to use. | |
2094 | Xindex* | |
2095 | do_initialize_xindex(); | |
2096 | ||
2097 | // Get symbol counts. | |
2098 | void | |
2099 | do_get_global_symbol_counts(const Symbol_table*, size_t*, size_t*) const; | |
2100 | ||
2101 | // Get global symbols. | |
2102 | const Symbols* | |
2103 | do_get_global_symbols() const | |
2104 | { return &this->symbols_; } | |
2105 | ||
2106 | // The Incremental_binary base file. | |
2107 | Sized_incremental_binary<size, big_endian>* ibase_; | |
2108 | // The index of the object in the input file list. | |
2109 | unsigned int input_file_index_; | |
2110 | // The reader for the input file. | |
2111 | Input_entry_reader input_reader_; | |
2112 | // The entries in the symbol table for the external symbols. | |
2113 | Symbols symbols_; | |
2114 | }; | |
2115 | ||
2116 | // Allocate an incremental object of the appropriate size and endianness. | |
2117 | extern Object* | |
2118 | make_sized_incremental_object( | |
2119 | Incremental_binary* base, | |
2120 | unsigned int input_file_index, | |
2121 | Incremental_input_type input_type, | |
2122 | const Incremental_binary::Input_reader* input_reader); | |
2123 | ||
2124 | // This class represents an Archive library (or --start-lib/--end-lib group) | |
2125 | // that has not changed since the last incremental link. Its contents come | |
2126 | // from the incremental inputs entry in the base file. | |
2127 | ||
2128 | class Incremental_library : public Library_base | |
2129 | { | |
2130 | public: | |
2131 | Incremental_library(const char* filename, unsigned int input_file_index, | |
2132 | const Incremental_binary::Input_reader* input_reader) | |
2133 | : Library_base(NULL), filename_(filename), | |
2134 | input_file_index_(input_file_index), input_reader_(input_reader), | |
2135 | unused_symbols_(), is_reported_(false) | |
2136 | { } | |
2137 | ||
2138 | // Return the input file index. | |
2139 | unsigned int | |
2140 | input_file_index() const | |
2141 | { return this->input_file_index_; } | |
2142 | ||
2143 | // Return the serial number of the input file. | |
2144 | unsigned int | |
2145 | arg_serial() const | |
2146 | { return this->input_reader_->arg_serial(); } | |
2147 | ||
2148 | // Copy the unused symbols from the incremental input info. | |
2149 | // We need to do this because we may be overwriting the incremental | |
2150 | // input info in the base file before we write the new incremental | |
2151 | // info. | |
2152 | void | |
2153 | copy_unused_symbols(); | |
2154 | ||
2155 | // Return FALSE on the first call to indicate that the library needs | |
2156 | // to be recorded; return TRUE subsequently. | |
2157 | bool | |
2158 | is_reported() | |
2159 | { | |
2160 | bool was_reported = this->is_reported_; | |
2161 | is_reported_ = true; | |
2162 | return was_reported; | |
2163 | } | |
2164 | ||
2165 | private: | |
2166 | typedef std::vector<std::string> Symbol_list; | |
2167 | ||
2168 | // The file name. | |
2169 | const std::string& | |
2170 | do_filename() const | |
2171 | { return this->filename_; } | |
2172 | ||
2173 | // Return the modification time of the archive file. | |
2174 | Timespec | |
2175 | do_get_mtime() | |
2176 | { return this->input_reader_->get_mtime(); } | |
2177 | ||
2178 | // Iterator for unused global symbols in the library. | |
2179 | void | |
2180 | do_for_all_unused_symbols(Symbol_visitor_base* v) const; | |
2181 | ||
2182 | // The name of the library. | |
2183 | std::string filename_; | |
2184 | // The input file index of this library. | |
2185 | unsigned int input_file_index_; | |
2186 | // A reader for the incremental input information. | |
2187 | const Incremental_binary::Input_reader* input_reader_; | |
2188 | // List of unused symbols defined in this library. | |
2189 | Symbol_list unused_symbols_; | |
2190 | // TRUE when this library has been reported to the new incremental info. | |
2191 | bool is_reported_; | |
b961d0d7 CC |
2192 | }; |
2193 | ||
3ce2c28e ILT |
2194 | } // End namespace gold. |
2195 | ||
2196 | #endif // !defined(GOLD_INCREMENTAL_H) |