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6d03d481 | 1 | // plugin.cc -- plugin manager for gold -*- C++ -*- |
89fc3421 | 2 | |
0f3b89d8 | 3 | // Copyright 2008, 2009, 2010, 2011 Free Software Foundation, Inc. |
89fc3421 CC |
4 | // Written by Cary Coutant <ccoutant@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 | ||
1c7814ed ILT |
23 | #include "gold.h" |
24 | ||
89fc3421 CC |
25 | #include <cstdio> |
26 | #include <cstdarg> | |
27 | #include <cstring> | |
28 | #include <string> | |
29 | #include <vector> | |
bc06c745 ILT |
30 | |
31 | #ifdef ENABLE_PLUGINS | |
89fc3421 | 32 | #include <dlfcn.h> |
bc06c745 | 33 | #endif |
89fc3421 | 34 | |
89fc3421 CC |
35 | #include "parameters.h" |
36 | #include "errors.h" | |
37 | #include "fileread.h" | |
38 | #include "layout.h" | |
39 | #include "options.h" | |
40 | #include "plugin.h" | |
41 | #include "target.h" | |
42 | #include "readsyms.h" | |
43 | #include "symtab.h" | |
44 | #include "elfcpp.h" | |
45 | ||
46 | namespace gold | |
47 | { | |
48 | ||
49 | #ifdef ENABLE_PLUGINS | |
50 | ||
51 | // The linker's exported interfaces. | |
52 | ||
53 | extern "C" | |
54 | { | |
55 | ||
56 | static enum ld_plugin_status | |
57 | register_claim_file(ld_plugin_claim_file_handler handler); | |
58 | ||
59 | static enum ld_plugin_status | |
60 | register_all_symbols_read(ld_plugin_all_symbols_read_handler handler); | |
61 | ||
62 | static enum ld_plugin_status | |
63 | register_cleanup(ld_plugin_cleanup_handler handler); | |
64 | ||
65 | static enum ld_plugin_status | |
66 | add_symbols(void *handle, int nsyms, const struct ld_plugin_symbol *syms); | |
67 | ||
0f7c0701 CC |
68 | static enum ld_plugin_status |
69 | get_input_file(const void *handle, struct ld_plugin_input_file *file); | |
70 | ||
71 | static enum ld_plugin_status | |
72 | release_input_file(const void *handle); | |
73 | ||
89fc3421 CC |
74 | static enum ld_plugin_status |
75 | get_symbols(const void *handle, int nsyms, struct ld_plugin_symbol *syms); | |
76 | ||
77 | static enum ld_plugin_status | |
6508b958 | 78 | add_input_file(const char *pathname); |
89fc3421 | 79 | |
e99daf92 | 80 | static enum ld_plugin_status |
6508b958 | 81 | add_input_library(const char *pathname); |
e99daf92 | 82 | |
42218b9f RÁE |
83 | static enum ld_plugin_status |
84 | set_extra_library_path(const char *path); | |
85 | ||
89fc3421 | 86 | static enum ld_plugin_status |
6c52134c | 87 | message(int level, const char *format, ...); |
89fc3421 CC |
88 | |
89 | }; | |
90 | ||
91 | #endif // ENABLE_PLUGINS | |
92 | ||
93 | static Pluginobj* make_sized_plugin_object(Input_file* input_file, | |
0f7c0701 | 94 | off_t offset, off_t filesize); |
89fc3421 CC |
95 | |
96 | // Plugin methods. | |
97 | ||
98 | // Load one plugin library. | |
99 | ||
100 | void | |
101 | Plugin::load() | |
102 | { | |
103 | #ifdef ENABLE_PLUGINS | |
89fc3421 CC |
104 | // Load the plugin library. |
105 | // FIXME: Look for the library in standard locations. | |
4674ecfc | 106 | this->handle_ = dlopen(this->filename_.c_str(), RTLD_NOW); |
89fc3421 CC |
107 | if (this->handle_ == NULL) |
108 | { | |
4802450a RÁE |
109 | gold_error(_("%s: could not load plugin library: %s"), |
110 | this->filename_.c_str(), dlerror()); | |
89fc3421 CC |
111 | return; |
112 | } | |
113 | ||
114 | // Find the plugin's onload entry point. | |
b59befec ILT |
115 | void* ptr = dlsym(this->handle_, "onload"); |
116 | if (ptr == NULL) | |
89fc3421 | 117 | { |
4674ecfc CC |
118 | gold_error(_("%s: could not find onload entry point"), |
119 | this->filename_.c_str()); | |
89fc3421 CC |
120 | return; |
121 | } | |
b59befec ILT |
122 | ld_plugin_onload onload; |
123 | gold_assert(sizeof(onload) == sizeof(ptr)); | |
124 | memcpy(&onload, &ptr, sizeof(ptr)); | |
89fc3421 CC |
125 | |
126 | // Get the linker's version number. | |
127 | const char* ver = get_version_string(); | |
128 | int major = 0; | |
129 | int minor = 0; | |
130 | sscanf(ver, "%d.%d", &major, &minor); | |
131 | ||
132 | // Allocate and populate a transfer vector. | |
42218b9f | 133 | const int tv_fixed_size = 16; |
4674ecfc | 134 | int tv_size = this->args_.size() + tv_fixed_size; |
ca09d69a | 135 | ld_plugin_tv* tv = new ld_plugin_tv[tv_size]; |
89fc3421 | 136 | |
abc8dcba CC |
137 | // Put LDPT_MESSAGE at the front of the list so the plugin can use it |
138 | // while processing subsequent entries. | |
89fc3421 | 139 | int i = 0; |
abc8dcba CC |
140 | tv[i].tv_tag = LDPT_MESSAGE; |
141 | tv[i].tv_u.tv_message = message; | |
142 | ||
143 | ++i; | |
89fc3421 CC |
144 | tv[i].tv_tag = LDPT_API_VERSION; |
145 | tv[i].tv_u.tv_val = LD_PLUGIN_API_VERSION; | |
146 | ||
147 | ++i; | |
148 | tv[i].tv_tag = LDPT_GOLD_VERSION; | |
149 | tv[i].tv_u.tv_val = major * 100 + minor; | |
150 | ||
151 | ++i; | |
152 | tv[i].tv_tag = LDPT_LINKER_OUTPUT; | |
153 | if (parameters->options().relocatable()) | |
154 | tv[i].tv_u.tv_val = LDPO_REL; | |
155 | else if (parameters->options().shared()) | |
156 | tv[i].tv_u.tv_val = LDPO_DYN; | |
157 | else | |
158 | tv[i].tv_u.tv_val = LDPO_EXEC; | |
159 | ||
3537c84b RÁE |
160 | ++i; |
161 | tv[i].tv_tag = LDPT_OUTPUT_NAME; | |
162 | tv[i].tv_u.tv_string = parameters->options().output(); | |
163 | ||
4674ecfc | 164 | for (unsigned int j = 0; j < this->args_.size(); ++j) |
89fc3421 CC |
165 | { |
166 | ++i; | |
167 | tv[i].tv_tag = LDPT_OPTION; | |
4674ecfc | 168 | tv[i].tv_u.tv_string = this->args_[j].c_str(); |
89fc3421 CC |
169 | } |
170 | ||
171 | ++i; | |
172 | tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK; | |
173 | tv[i].tv_u.tv_register_claim_file = register_claim_file; | |
174 | ||
175 | ++i; | |
176 | tv[i].tv_tag = LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK; | |
177 | tv[i].tv_u.tv_register_all_symbols_read = register_all_symbols_read; | |
178 | ||
179 | ++i; | |
180 | tv[i].tv_tag = LDPT_REGISTER_CLEANUP_HOOK; | |
181 | tv[i].tv_u.tv_register_cleanup = register_cleanup; | |
182 | ||
183 | ++i; | |
184 | tv[i].tv_tag = LDPT_ADD_SYMBOLS; | |
185 | tv[i].tv_u.tv_add_symbols = add_symbols; | |
186 | ||
0f7c0701 CC |
187 | ++i; |
188 | tv[i].tv_tag = LDPT_GET_INPUT_FILE; | |
189 | tv[i].tv_u.tv_get_input_file = get_input_file; | |
190 | ||
191 | ++i; | |
192 | tv[i].tv_tag = LDPT_RELEASE_INPUT_FILE; | |
193 | tv[i].tv_u.tv_release_input_file = release_input_file; | |
194 | ||
89fc3421 CC |
195 | ++i; |
196 | tv[i].tv_tag = LDPT_GET_SYMBOLS; | |
197 | tv[i].tv_u.tv_get_symbols = get_symbols; | |
198 | ||
199 | ++i; | |
200 | tv[i].tv_tag = LDPT_ADD_INPUT_FILE; | |
201 | tv[i].tv_u.tv_add_input_file = add_input_file; | |
202 | ||
e99daf92 ILT |
203 | ++i; |
204 | tv[i].tv_tag = LDPT_ADD_INPUT_LIBRARY; | |
205 | tv[i].tv_u.tv_add_input_library = add_input_library; | |
206 | ||
42218b9f RÁE |
207 | ++i; |
208 | tv[i].tv_tag = LDPT_SET_EXTRA_LIBRARY_PATH; | |
209 | tv[i].tv_u.tv_set_extra_library_path = set_extra_library_path; | |
210 | ||
89fc3421 CC |
211 | ++i; |
212 | tv[i].tv_tag = LDPT_NULL; | |
213 | tv[i].tv_u.tv_val = 0; | |
214 | ||
215 | gold_assert(i == tv_size - 1); | |
216 | ||
217 | // Call the onload entry point. | |
218 | (*onload)(tv); | |
219 | ||
6c52134c | 220 | delete[] tv; |
89fc3421 CC |
221 | #endif // ENABLE_PLUGINS |
222 | } | |
223 | ||
224 | // Call the plugin claim-file handler. | |
225 | ||
226 | inline bool | |
ca09d69a | 227 | Plugin::claim_file(struct ld_plugin_input_file* plugin_input_file) |
89fc3421 CC |
228 | { |
229 | int claimed = 0; | |
230 | ||
231 | if (this->claim_file_handler_ != NULL) | |
232 | { | |
233 | (*this->claim_file_handler_)(plugin_input_file, &claimed); | |
234 | if (claimed) | |
235 | return true; | |
236 | } | |
237 | return false; | |
238 | } | |
239 | ||
240 | // Call the all-symbols-read handler. | |
241 | ||
242 | inline void | |
243 | Plugin::all_symbols_read() | |
244 | { | |
245 | if (this->all_symbols_read_handler_ != NULL) | |
246 | (*this->all_symbols_read_handler_)(); | |
247 | } | |
248 | ||
249 | // Call the cleanup handler. | |
250 | ||
251 | inline void | |
252 | Plugin::cleanup() | |
253 | { | |
40f36857 CC |
254 | if (this->cleanup_handler_ != NULL && !this->cleanup_done_) |
255 | { | |
256 | // Set this flag before calling to prevent a recursive plunge | |
257 | // in the event that a plugin's cleanup handler issues a | |
258 | // fatal error. | |
259 | this->cleanup_done_ = true; | |
260 | (*this->cleanup_handler_)(); | |
261 | } | |
89fc3421 CC |
262 | } |
263 | ||
0f3b89d8 ILT |
264 | // This task is used to rescan archives as needed. |
265 | ||
266 | class Plugin_rescan : public Task | |
267 | { | |
268 | public: | |
269 | Plugin_rescan(Task_token* this_blocker, Task_token* next_blocker) | |
270 | : this_blocker_(this_blocker), next_blocker_(next_blocker) | |
271 | { } | |
272 | ||
273 | ~Plugin_rescan() | |
274 | { | |
275 | delete this->this_blocker_; | |
276 | } | |
277 | ||
278 | Task_token* | |
279 | is_runnable() | |
280 | { | |
281 | if (this->this_blocker_->is_blocked()) | |
282 | return this->this_blocker_; | |
283 | return NULL; | |
284 | } | |
285 | ||
286 | void | |
287 | locks(Task_locker* tl) | |
288 | { tl->add(this, this->next_blocker_); } | |
289 | ||
290 | void | |
291 | run(Workqueue*) | |
292 | { parameters->options().plugins()->rescan(this); } | |
293 | ||
294 | std::string | |
295 | get_name() const | |
296 | { return "Plugin_rescan"; } | |
297 | ||
298 | private: | |
299 | Task_token* this_blocker_; | |
300 | Task_token* next_blocker_; | |
301 | }; | |
302 | ||
89fc3421 CC |
303 | // Plugin_manager methods. |
304 | ||
305 | Plugin_manager::~Plugin_manager() | |
306 | { | |
307 | for (Plugin_list::iterator p = this->plugins_.begin(); | |
308 | p != this->plugins_.end(); | |
309 | ++p) | |
310 | delete *p; | |
311 | this->plugins_.clear(); | |
312 | for (Object_list::iterator obj = this->objects_.begin(); | |
313 | obj != this->objects_.end(); | |
314 | ++obj) | |
315 | delete *obj; | |
316 | this->objects_.clear(); | |
317 | } | |
318 | ||
319 | // Load all plugin libraries. | |
320 | ||
321 | void | |
322 | Plugin_manager::load_plugins() | |
323 | { | |
324 | for (this->current_ = this->plugins_.begin(); | |
325 | this->current_ != this->plugins_.end(); | |
326 | ++this->current_) | |
327 | (*this->current_)->load(); | |
328 | } | |
329 | ||
330 | // Call the plugin claim-file handlers in turn to see if any claim the file. | |
331 | ||
332 | Pluginobj* | |
333 | Plugin_manager::claim_file(Input_file* input_file, off_t offset, | |
334 | off_t filesize) | |
335 | { | |
336 | if (this->in_replacement_phase_) | |
337 | return NULL; | |
338 | ||
339 | unsigned int handle = this->objects_.size(); | |
340 | this->input_file_ = input_file; | |
341 | this->plugin_input_file_.name = input_file->filename().c_str(); | |
342 | this->plugin_input_file_.fd = input_file->file().descriptor(); | |
343 | this->plugin_input_file_.offset = offset; | |
344 | this->plugin_input_file_.filesize = filesize; | |
345 | this->plugin_input_file_.handle = reinterpret_cast<void*>(handle); | |
346 | ||
347 | for (this->current_ = this->plugins_.begin(); | |
348 | this->current_ != this->plugins_.end(); | |
349 | ++this->current_) | |
350 | { | |
351 | if ((*this->current_)->claim_file(&this->plugin_input_file_)) | |
352 | { | |
0f3b89d8 ILT |
353 | this->any_claimed_ = true; |
354 | ||
abc8dcba CC |
355 | if (this->objects_.size() > handle) |
356 | return this->objects_[handle]; | |
357 | ||
358 | // If the plugin claimed the file but did not call the | |
359 | // add_symbols callback, we need to create the Pluginobj now. | |
360 | Pluginobj* obj = this->make_plugin_object(handle); | |
361 | return obj; | |
89fc3421 CC |
362 | } |
363 | } | |
364 | ||
365 | return NULL; | |
366 | } | |
367 | ||
0f3b89d8 ILT |
368 | // Save an archive. This is used so that a plugin can add a file |
369 | // which refers to a symbol which was not previously referenced. In | |
370 | // that case we want to pretend that the symbol was referenced before, | |
371 | // and pull in the archive object. | |
372 | ||
373 | void | |
374 | Plugin_manager::save_archive(Archive* archive) | |
375 | { | |
376 | if (this->in_replacement_phase_ || !this->any_claimed_) | |
377 | delete archive; | |
378 | else | |
379 | this->rescannable_.push_back(Rescannable(archive)); | |
380 | } | |
381 | ||
382 | // Save an Input_group. This is like save_archive. | |
383 | ||
384 | void | |
385 | Plugin_manager::save_input_group(Input_group* input_group) | |
386 | { | |
387 | if (this->in_replacement_phase_ || !this->any_claimed_) | |
388 | delete input_group; | |
389 | else | |
390 | this->rescannable_.push_back(Rescannable(input_group)); | |
391 | } | |
392 | ||
89fc3421 CC |
393 | // Call the all-symbols-read handlers. |
394 | ||
395 | void | |
0f7c0701 | 396 | Plugin_manager::all_symbols_read(Workqueue* workqueue, Task* task, |
89fc3421 | 397 | Input_objects* input_objects, |
2ea97941 | 398 | Symbol_table* symtab, Layout* layout, |
89fc3421 CC |
399 | Dirsearch* dirpath, Mapfile* mapfile, |
400 | Task_token** last_blocker) | |
401 | { | |
402 | this->in_replacement_phase_ = true; | |
403 | this->workqueue_ = workqueue; | |
0f7c0701 | 404 | this->task_ = task; |
89fc3421 CC |
405 | this->input_objects_ = input_objects; |
406 | this->symtab_ = symtab; | |
2ea97941 | 407 | this->layout_ = layout; |
89fc3421 CC |
408 | this->dirpath_ = dirpath; |
409 | this->mapfile_ = mapfile; | |
410 | this->this_blocker_ = NULL; | |
411 | ||
412 | for (this->current_ = this->plugins_.begin(); | |
413 | this->current_ != this->plugins_.end(); | |
414 | ++this->current_) | |
415 | (*this->current_)->all_symbols_read(); | |
416 | ||
0f3b89d8 ILT |
417 | if (this->any_added_) |
418 | { | |
419 | Task_token* next_blocker = new Task_token(true); | |
420 | next_blocker->add_blocker(); | |
421 | workqueue->queue(new Plugin_rescan(this->this_blocker_, next_blocker)); | |
422 | this->this_blocker_ = next_blocker; | |
423 | } | |
424 | ||
89fc3421 CC |
425 | *last_blocker = this->this_blocker_; |
426 | } | |
427 | ||
0f3b89d8 ILT |
428 | // This is called when we see a new undefined symbol. If we are in |
429 | // the replacement phase, this means that we may need to rescan some | |
430 | // archives we have previously seen. | |
431 | ||
432 | void | |
433 | Plugin_manager::new_undefined_symbol(Symbol* sym) | |
434 | { | |
435 | if (this->in_replacement_phase_) | |
436 | this->undefined_symbols_.push_back(sym); | |
437 | } | |
438 | ||
439 | // Rescan archives as needed. This handles the case where a new | |
440 | // object file added by a plugin has an undefined reference to some | |
441 | // symbol defined in an archive. | |
442 | ||
443 | void | |
444 | Plugin_manager::rescan(Task* task) | |
445 | { | |
446 | size_t rescan_pos = 0; | |
447 | size_t rescan_size = this->rescannable_.size(); | |
448 | while (!this->undefined_symbols_.empty()) | |
449 | { | |
450 | if (rescan_pos >= rescan_size) | |
451 | { | |
452 | this->undefined_symbols_.clear(); | |
453 | return; | |
454 | } | |
455 | ||
456 | Undefined_symbol_list undefs; | |
457 | undefs.reserve(this->undefined_symbols_.size()); | |
458 | this->undefined_symbols_.swap(undefs); | |
459 | ||
460 | size_t min_rescan_pos = rescan_size; | |
461 | ||
462 | for (Undefined_symbol_list::const_iterator p = undefs.begin(); | |
463 | p != undefs.end(); | |
464 | ++p) | |
465 | { | |
466 | if (!(*p)->is_undefined()) | |
467 | continue; | |
468 | ||
469 | this->undefined_symbols_.push_back(*p); | |
470 | ||
471 | // Find the first rescan archive which defines this symbol, | |
472 | // starting at the current rescan position. The rescan position | |
473 | // exists so that given -la -lb -lc we don't look for undefined | |
474 | // symbols in -lb back in -la, but instead get the definition | |
475 | // from -lc. Don't bother to look past the current minimum | |
476 | // rescan position. | |
477 | for (size_t i = rescan_pos; i < min_rescan_pos; ++i) | |
478 | { | |
479 | if (this->rescannable_defines(i, *p)) | |
480 | { | |
481 | min_rescan_pos = i; | |
482 | break; | |
483 | } | |
484 | } | |
485 | } | |
486 | ||
487 | if (min_rescan_pos >= rescan_size) | |
488 | { | |
489 | // We didn't find any rescannable archives which define any | |
490 | // undefined symbols. | |
491 | return; | |
492 | } | |
493 | ||
494 | const Rescannable& r(this->rescannable_[min_rescan_pos]); | |
495 | if (r.is_archive) | |
496 | { | |
497 | Task_lock_obj<Archive> tl(task, r.u.archive); | |
498 | r.u.archive->add_symbols(this->symtab_, this->layout_, | |
499 | this->input_objects_, this->mapfile_); | |
500 | } | |
501 | else | |
502 | { | |
503 | size_t next_saw_undefined = this->symtab_->saw_undefined(); | |
504 | size_t saw_undefined; | |
505 | do | |
506 | { | |
507 | saw_undefined = next_saw_undefined; | |
508 | ||
509 | for (Input_group::const_iterator p = r.u.input_group->begin(); | |
510 | p != r.u.input_group->end(); | |
511 | ++p) | |
512 | { | |
513 | Task_lock_obj<Archive> tl(task, *p); | |
514 | ||
515 | (*p)->add_symbols(this->symtab_, this->layout_, | |
516 | this->input_objects_, this->mapfile_); | |
517 | } | |
518 | ||
519 | next_saw_undefined = this->symtab_->saw_undefined(); | |
520 | } | |
521 | while (saw_undefined != next_saw_undefined); | |
522 | } | |
523 | ||
524 | for (size_t i = rescan_pos; i < min_rescan_pos + 1; ++i) | |
525 | { | |
526 | if (this->rescannable_[i].is_archive) | |
527 | delete this->rescannable_[i].u.archive; | |
528 | else | |
529 | delete this->rescannable_[i].u.input_group; | |
530 | } | |
531 | ||
532 | rescan_pos = min_rescan_pos + 1; | |
533 | } | |
534 | } | |
535 | ||
536 | // Return whether the rescannable at index I defines SYM. | |
537 | ||
538 | bool | |
539 | Plugin_manager::rescannable_defines(size_t i, Symbol* sym) | |
540 | { | |
541 | const Rescannable& r(this->rescannable_[i]); | |
542 | if (r.is_archive) | |
543 | return r.u.archive->defines_symbol(sym); | |
544 | else | |
545 | { | |
546 | for (Input_group::const_iterator p = r.u.input_group->begin(); | |
547 | p != r.u.input_group->end(); | |
548 | ++p) | |
549 | { | |
550 | if ((*p)->defines_symbol(sym)) | |
551 | return true; | |
552 | } | |
553 | return false; | |
554 | } | |
555 | } | |
556 | ||
483620e8 | 557 | // Layout deferred objects. |
89fc3421 CC |
558 | |
559 | void | |
483620e8 | 560 | Plugin_manager::layout_deferred_objects() |
89fc3421 | 561 | { |
5995b570 CC |
562 | Deferred_layout_list::iterator obj; |
563 | ||
564 | for (obj = this->deferred_layout_objects_.begin(); | |
565 | obj != this->deferred_layout_objects_.end(); | |
566 | ++obj) | |
5f9bcf58 CC |
567 | { |
568 | // Lock the object so we can read from it. This is only called | |
569 | // single-threaded from queue_middle_tasks, so it is OK to lock. | |
570 | // Unfortunately we have no way to pass in a Task token. | |
571 | const Task* dummy_task = reinterpret_cast<const Task*>(-1); | |
572 | Task_lock_obj<Object> tl(dummy_task, *obj); | |
573 | (*obj)->layout_deferred_sections(this->layout_); | |
574 | } | |
483620e8 CC |
575 | } |
576 | ||
577 | // Call the cleanup handlers. | |
5995b570 | 578 | |
483620e8 CC |
579 | void |
580 | Plugin_manager::cleanup() | |
581 | { | |
89fc3421 CC |
582 | for (this->current_ = this->plugins_.begin(); |
583 | this->current_ != this->plugins_.end(); | |
584 | ++this->current_) | |
585 | (*this->current_)->cleanup(); | |
586 | } | |
587 | ||
588 | // Make a new Pluginobj object. This is called when the plugin calls | |
589 | // the add_symbols API. | |
590 | ||
591 | Pluginobj* | |
592 | Plugin_manager::make_plugin_object(unsigned int handle) | |
593 | { | |
594 | // Make sure we aren't asked to make an object for the same handle twice. | |
595 | if (this->objects_.size() != handle) | |
596 | return NULL; | |
597 | ||
598 | Pluginobj* obj = make_sized_plugin_object(this->input_file_, | |
0f7c0701 CC |
599 | this->plugin_input_file_.offset, |
600 | this->plugin_input_file_.filesize); | |
89fc3421 CC |
601 | this->objects_.push_back(obj); |
602 | return obj; | |
603 | } | |
604 | ||
0f7c0701 CC |
605 | // Get the input file information with an open (possibly re-opened) |
606 | // file descriptor. | |
607 | ||
608 | ld_plugin_status | |
609 | Plugin_manager::get_input_file(unsigned int handle, | |
ca09d69a | 610 | struct ld_plugin_input_file* file) |
0f7c0701 CC |
611 | { |
612 | Pluginobj* obj = this->object(handle); | |
613 | if (obj == NULL) | |
614 | return LDPS_BAD_HANDLE; | |
615 | ||
616 | obj->lock(this->task_); | |
617 | file->name = obj->filename().c_str(); | |
618 | file->fd = obj->descriptor(); | |
619 | file->offset = obj->offset(); | |
620 | file->filesize = obj->filesize(); | |
621 | file->handle = reinterpret_cast<void*>(handle); | |
622 | return LDPS_OK; | |
623 | } | |
624 | ||
625 | // Release the input file. | |
626 | ||
627 | ld_plugin_status | |
628 | Plugin_manager::release_input_file(unsigned int handle) | |
629 | { | |
630 | Pluginobj* obj = this->object(handle); | |
631 | if (obj == NULL) | |
632 | return LDPS_BAD_HANDLE; | |
633 | ||
634 | obj->unlock(this->task_); | |
635 | return LDPS_OK; | |
636 | } | |
637 | ||
42218b9f RÁE |
638 | // Add a new library path. |
639 | ||
640 | ld_plugin_status | |
ca09d69a | 641 | Plugin_manager::set_extra_library_path(const char* path) |
42218b9f RÁE |
642 | { |
643 | this->extra_search_path_ = std::string(path); | |
644 | return LDPS_OK; | |
645 | } | |
646 | ||
89fc3421 CC |
647 | // Add a new input file. |
648 | ||
649 | ld_plugin_status | |
ca09d69a | 650 | Plugin_manager::add_input_file(const char* pathname, bool is_lib) |
89fc3421 | 651 | { |
ae3b5189 CD |
652 | Input_file_argument file(pathname, |
653 | (is_lib | |
654 | ? Input_file_argument::INPUT_FILE_TYPE_LIBRARY | |
655 | : Input_file_argument::INPUT_FILE_TYPE_FILE), | |
42218b9f RÁE |
656 | (is_lib |
657 | ? this->extra_search_path_.c_str() | |
658 | : ""), | |
659 | false, | |
660 | this->options_); | |
89fc3421 CC |
661 | Input_argument* input_argument = new Input_argument(file); |
662 | Task_token* next_blocker = new Task_token(true); | |
663 | next_blocker->add_blocker(); | |
8c21d9d3 | 664 | if (parameters->incremental()) |
40f36857 CC |
665 | gold_error(_("input files added by plug-ins in --incremental mode not " |
666 | "supported yet")); | |
f1ed28fb | 667 | this->workqueue_->queue_soon(new Read_symbols(this->input_objects_, |
89fc3421 CC |
668 | this->symtab_, |
669 | this->layout_, | |
670 | this->dirpath_, | |
15f8229b | 671 | 0, |
89fc3421 CC |
672 | this->mapfile_, |
673 | input_argument, | |
674 | NULL, | |
b0193076 | 675 | NULL, |
89fc3421 CC |
676 | this->this_blocker_, |
677 | next_blocker)); | |
678 | this->this_blocker_ = next_blocker; | |
0f3b89d8 | 679 | this->any_added_ = true; |
89fc3421 CC |
680 | return LDPS_OK; |
681 | } | |
682 | ||
683 | // Class Pluginobj. | |
684 | ||
2ea97941 ILT |
685 | Pluginobj::Pluginobj(const std::string& name, Input_file* input_file, |
686 | off_t offset, off_t filesize) | |
687 | : Object(name, input_file, false, offset), | |
688 | nsyms_(0), syms_(NULL), symbols_(), filesize_(filesize), comdat_map_() | |
89fc3421 CC |
689 | { |
690 | } | |
691 | ||
d66a9eb3 CC |
692 | // Return TRUE if a defined symbol might be reachable from outside the |
693 | // universe of claimed objects. | |
694 | ||
695 | static inline bool | |
696 | is_visible_from_outside(Symbol* lsym) | |
697 | { | |
698 | if (lsym->in_real_elf()) | |
699 | return true; | |
700 | if (parameters->options().relocatable()) | |
701 | return true; | |
84ced98a RÁE |
702 | if (parameters->options().is_undefined(lsym->name())) |
703 | return true; | |
d66a9eb3 CC |
704 | if (parameters->options().export_dynamic() || parameters->options().shared()) |
705 | return lsym->is_externally_visible(); | |
706 | return false; | |
707 | } | |
708 | ||
89fc3421 CC |
709 | // Get symbol resolution info. |
710 | ||
711 | ld_plugin_status | |
712 | Pluginobj::get_symbol_resolution_info(int nsyms, ld_plugin_symbol* syms) const | |
713 | { | |
abc8dcba | 714 | if (nsyms > this->nsyms_) |
89fc3421 | 715 | return LDPS_NO_SYMS; |
b0193076 RÁE |
716 | |
717 | if (static_cast<size_t>(nsyms) > this->symbols_.size()) | |
718 | { | |
719 | // We never decided to include this object. We mark all symbols as | |
720 | // preempted. | |
ca09d69a | 721 | gold_assert(this->symbols_.size() == 0); |
b0193076 RÁE |
722 | for (int i = 0; i < nsyms; i++) |
723 | syms[i].resolution = LDPR_PREEMPTED_REG; | |
724 | return LDPS_OK; | |
725 | } | |
726 | ||
89fc3421 CC |
727 | for (int i = 0; i < nsyms; i++) |
728 | { | |
729 | ld_plugin_symbol* isym = &syms[i]; | |
730 | Symbol* lsym = this->symbols_[i]; | |
731 | ld_plugin_symbol_resolution res = LDPR_UNKNOWN; | |
732 | ||
733 | if (lsym->is_undefined()) | |
734 | // The symbol remains undefined. | |
735 | res = LDPR_UNDEF; | |
736 | else if (isym->def == LDPK_UNDEF | |
737 | || isym->def == LDPK_WEAKUNDEF | |
738 | || isym->def == LDPK_COMMON) | |
739 | { | |
740 | // The original symbol was undefined or common. | |
741 | if (lsym->source() != Symbol::FROM_OBJECT) | |
742 | res = LDPR_RESOLVED_EXEC; | |
be234d88 CC |
743 | else if (lsym->object()->pluginobj() == this) |
744 | res = (is_visible_from_outside(lsym) | |
745 | ? LDPR_PREVAILING_DEF | |
746 | : LDPR_PREVAILING_DEF_IRONLY); | |
89fc3421 CC |
747 | else if (lsym->object()->pluginobj() != NULL) |
748 | res = LDPR_RESOLVED_IR; | |
749 | else if (lsym->object()->is_dynamic()) | |
750 | res = LDPR_RESOLVED_DYN; | |
751 | else | |
752 | res = LDPR_RESOLVED_EXEC; | |
753 | } | |
754 | else | |
755 | { | |
756 | // The original symbol was a definition. | |
757 | if (lsym->source() != Symbol::FROM_OBJECT) | |
758 | res = LDPR_PREEMPTED_REG; | |
759 | else if (lsym->object() == static_cast<const Object*>(this)) | |
d66a9eb3 | 760 | res = (is_visible_from_outside(lsym) |
89fc3421 CC |
761 | ? LDPR_PREVAILING_DEF |
762 | : LDPR_PREVAILING_DEF_IRONLY); | |
763 | else | |
764 | res = (lsym->object()->pluginobj() != NULL | |
765 | ? LDPR_PREEMPTED_IR | |
766 | : LDPR_PREEMPTED_REG); | |
767 | } | |
768 | isym->resolution = res; | |
769 | } | |
770 | return LDPS_OK; | |
771 | } | |
772 | ||
773 | // Return TRUE if the comdat group with key COMDAT_KEY from this object | |
774 | // should be kept. | |
775 | ||
776 | bool | |
2ea97941 | 777 | Pluginobj::include_comdat_group(std::string comdat_key, Layout* layout) |
89fc3421 CC |
778 | { |
779 | std::pair<Comdat_map::iterator, bool> ins = | |
780 | this->comdat_map_.insert(std::make_pair(comdat_key, false)); | |
781 | ||
782 | // If this is the first time we've seen this comdat key, ask the | |
783 | // layout object whether it should be included. | |
784 | if (ins.second) | |
2ea97941 ILT |
785 | ins.first->second = layout->find_or_add_kept_section(comdat_key, |
786 | NULL, 0, true, | |
787 | true, NULL); | |
89fc3421 CC |
788 | |
789 | return ins.first->second; | |
790 | } | |
791 | ||
792 | // Class Sized_pluginobj. | |
793 | ||
794 | template<int size, bool big_endian> | |
795 | Sized_pluginobj<size, big_endian>::Sized_pluginobj( | |
2ea97941 ILT |
796 | const std::string& name, |
797 | Input_file* input_file, | |
798 | off_t offset, | |
799 | off_t filesize) | |
800 | : Pluginobj(name, input_file, offset, filesize) | |
89fc3421 CC |
801 | { |
802 | } | |
803 | ||
804 | // Read the symbols. Not used for plugin objects. | |
805 | ||
806 | template<int size, bool big_endian> | |
807 | void | |
808 | Sized_pluginobj<size, big_endian>::do_read_symbols(Read_symbols_data*) | |
809 | { | |
810 | gold_unreachable(); | |
811 | } | |
812 | ||
813 | // Lay out the input sections. Not used for plugin objects. | |
814 | ||
815 | template<int size, bool big_endian> | |
816 | void | |
817 | Sized_pluginobj<size, big_endian>::do_layout(Symbol_table*, Layout*, | |
818 | Read_symbols_data*) | |
819 | { | |
820 | gold_unreachable(); | |
821 | } | |
822 | ||
823 | // Add the symbols to the symbol table. | |
824 | ||
89fc3421 CC |
825 | template<int size, bool big_endian> |
826 | void | |
827 | Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table* symtab, | |
f488e4b0 | 828 | Read_symbols_data*, |
2ea97941 | 829 | Layout* layout) |
89fc3421 CC |
830 | { |
831 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
832 | unsigned char symbuf[sym_size]; | |
833 | elfcpp::Sym<size, big_endian> sym(symbuf); | |
834 | elfcpp::Sym_write<size, big_endian> osym(symbuf); | |
835 | ||
836 | typedef typename elfcpp::Elf_types<size>::Elf_WXword Elf_size_type; | |
837 | ||
838 | this->symbols_.resize(this->nsyms_); | |
839 | ||
840 | for (int i = 0; i < this->nsyms_; ++i) | |
841 | { | |
ca09d69a | 842 | const struct ld_plugin_symbol* isym = &this->syms_[i]; |
2ea97941 | 843 | const char* name = isym->name; |
89fc3421 CC |
844 | const char* ver = isym->version; |
845 | elfcpp::Elf_Half shndx; | |
846 | elfcpp::STB bind; | |
847 | elfcpp::STV vis; | |
848 | ||
2ea97941 ILT |
849 | if (name != NULL && name[0] == '\0') |
850 | name = NULL; | |
89fc3421 CC |
851 | if (ver != NULL && ver[0] == '\0') |
852 | ver = NULL; | |
853 | ||
854 | switch (isym->def) | |
855 | { | |
856 | case LDPK_WEAKDEF: | |
857 | case LDPK_WEAKUNDEF: | |
858 | bind = elfcpp::STB_WEAK; | |
859 | break; | |
860 | case LDPK_DEF: | |
861 | case LDPK_UNDEF: | |
862 | case LDPK_COMMON: | |
863 | default: | |
864 | bind = elfcpp::STB_GLOBAL; | |
865 | break; | |
866 | } | |
867 | ||
868 | switch (isym->def) | |
869 | { | |
870 | case LDPK_DEF: | |
871 | case LDPK_WEAKDEF: | |
872 | shndx = elfcpp::SHN_ABS; | |
873 | break; | |
874 | case LDPK_COMMON: | |
875 | shndx = elfcpp::SHN_COMMON; | |
876 | break; | |
877 | case LDPK_UNDEF: | |
878 | case LDPK_WEAKUNDEF: | |
879 | default: | |
880 | shndx = elfcpp::SHN_UNDEF; | |
881 | break; | |
882 | } | |
883 | ||
884 | switch (isym->visibility) | |
885 | { | |
886 | case LDPV_PROTECTED: | |
105b6afd | 887 | vis = elfcpp::STV_PROTECTED; |
89fc3421 CC |
888 | break; |
889 | case LDPV_INTERNAL: | |
105b6afd | 890 | vis = elfcpp::STV_INTERNAL; |
89fc3421 CC |
891 | break; |
892 | case LDPV_HIDDEN: | |
105b6afd | 893 | vis = elfcpp::STV_HIDDEN; |
89fc3421 CC |
894 | break; |
895 | case LDPV_DEFAULT: | |
896 | default: | |
897 | vis = elfcpp::STV_DEFAULT; | |
898 | break; | |
899 | } | |
900 | ||
901 | if (isym->comdat_key != NULL | |
902 | && isym->comdat_key[0] != '\0' | |
2ea97941 | 903 | && !this->include_comdat_group(isym->comdat_key, layout)) |
89fc3421 CC |
904 | shndx = elfcpp::SHN_UNDEF; |
905 | ||
906 | osym.put_st_name(0); | |
907 | osym.put_st_value(0); | |
908 | osym.put_st_size(static_cast<Elf_size_type>(isym->size)); | |
909 | osym.put_st_info(bind, elfcpp::STT_NOTYPE); | |
910 | osym.put_st_other(vis, 0); | |
911 | osym.put_st_shndx(shndx); | |
912 | ||
913 | this->symbols_[i] = | |
2ea97941 | 914 | symtab->add_from_pluginobj<size, big_endian>(this, name, ver, &sym); |
89fc3421 CC |
915 | } |
916 | } | |
917 | ||
b0193076 RÁE |
918 | template<int size, bool big_endian> |
919 | Archive::Should_include | |
920 | Sized_pluginobj<size, big_endian>::do_should_include_member( | |
88a4108b ILT |
921 | Symbol_table* symtab, |
922 | Layout* layout, | |
923 | Read_symbols_data*, | |
924 | std::string* why) | |
b0193076 RÁE |
925 | { |
926 | char* tmpbuf = NULL; | |
927 | size_t tmpbuflen = 0; | |
928 | ||
88a4108b ILT |
929 | for (int i = 0; i < this->nsyms_; ++i) |
930 | { | |
931 | const struct ld_plugin_symbol& sym = this->syms_[i]; | |
932 | const char* name = sym.name; | |
933 | Symbol* symbol; | |
934 | Archive::Should_include t = Archive::should_include_member(symtab, | |
935 | layout, | |
936 | name, | |
937 | &symbol, why, | |
938 | &tmpbuf, | |
939 | &tmpbuflen); | |
b0193076 RÁE |
940 | if (t == Archive::SHOULD_INCLUDE_YES) |
941 | { | |
942 | if (tmpbuf != NULL) | |
943 | free(tmpbuf); | |
944 | return t; | |
945 | } | |
88a4108b | 946 | } |
b0193076 RÁE |
947 | if (tmpbuf != NULL) |
948 | free(tmpbuf); | |
949 | return Archive::SHOULD_INCLUDE_UNKNOWN; | |
950 | } | |
951 | ||
89fc3421 CC |
952 | // Get the size of a section. Not used for plugin objects. |
953 | ||
954 | template<int size, bool big_endian> | |
955 | uint64_t | |
956 | Sized_pluginobj<size, big_endian>::do_section_size(unsigned int) | |
957 | { | |
958 | gold_unreachable(); | |
959 | return 0; | |
960 | } | |
961 | ||
962 | // Get the name of a section. Not used for plugin objects. | |
963 | ||
964 | template<int size, bool big_endian> | |
965 | std::string | |
966 | Sized_pluginobj<size, big_endian>::do_section_name(unsigned int) | |
967 | { | |
968 | gold_unreachable(); | |
969 | return std::string(); | |
970 | } | |
971 | ||
972 | // Return a view of the contents of a section. Not used for plugin objects. | |
973 | ||
974 | template<int size, bool big_endian> | |
975 | Object::Location | |
976 | Sized_pluginobj<size, big_endian>::do_section_contents(unsigned int) | |
977 | { | |
978 | Location loc(0, 0); | |
979 | ||
980 | gold_unreachable(); | |
981 | return loc; | |
982 | } | |
983 | ||
984 | // Return section flags. Not used for plugin objects. | |
985 | ||
986 | template<int size, bool big_endian> | |
987 | uint64_t | |
988 | Sized_pluginobj<size, big_endian>::do_section_flags(unsigned int) | |
989 | { | |
990 | gold_unreachable(); | |
991 | return 0; | |
992 | } | |
993 | ||
ef15dade ST |
994 | // Return section entsize. Not used for plugin objects. |
995 | ||
996 | template<int size, bool big_endian> | |
997 | uint64_t | |
998 | Sized_pluginobj<size, big_endian>::do_section_entsize(unsigned int) | |
999 | { | |
1000 | gold_unreachable(); | |
1001 | return 0; | |
1002 | } | |
1003 | ||
89fc3421 CC |
1004 | // Return section address. Not used for plugin objects. |
1005 | ||
1006 | template<int size, bool big_endian> | |
1007 | uint64_t | |
1008 | Sized_pluginobj<size, big_endian>::do_section_address(unsigned int) | |
1009 | { | |
1010 | gold_unreachable(); | |
1011 | return 0; | |
1012 | } | |
1013 | ||
1014 | // Return section type. Not used for plugin objects. | |
1015 | ||
1016 | template<int size, bool big_endian> | |
1017 | unsigned int | |
1018 | Sized_pluginobj<size, big_endian>::do_section_type(unsigned int) | |
1019 | { | |
1020 | gold_unreachable(); | |
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | // Return the section link field. Not used for plugin objects. | |
1025 | ||
1026 | template<int size, bool big_endian> | |
1027 | unsigned int | |
1028 | Sized_pluginobj<size, big_endian>::do_section_link(unsigned int) | |
1029 | { | |
1030 | gold_unreachable(); | |
1031 | return 0; | |
1032 | } | |
1033 | ||
1034 | // Return the section link field. Not used for plugin objects. | |
1035 | ||
1036 | template<int size, bool big_endian> | |
1037 | unsigned int | |
1038 | Sized_pluginobj<size, big_endian>::do_section_info(unsigned int) | |
1039 | { | |
1040 | gold_unreachable(); | |
1041 | return 0; | |
1042 | } | |
1043 | ||
1044 | // Return the section alignment. Not used for plugin objects. | |
1045 | ||
1046 | template<int size, bool big_endian> | |
1047 | uint64_t | |
1048 | Sized_pluginobj<size, big_endian>::do_section_addralign(unsigned int) | |
1049 | { | |
1050 | gold_unreachable(); | |
1051 | return 0; | |
1052 | } | |
1053 | ||
1054 | // Return the Xindex structure to use. Not used for plugin objects. | |
1055 | ||
1056 | template<int size, bool big_endian> | |
1057 | Xindex* | |
1058 | Sized_pluginobj<size, big_endian>::do_initialize_xindex() | |
1059 | { | |
1060 | gold_unreachable(); | |
1061 | return NULL; | |
1062 | } | |
1063 | ||
1064 | // Get symbol counts. Not used for plugin objects. | |
1065 | ||
1066 | template<int size, bool big_endian> | |
1067 | void | |
1068 | Sized_pluginobj<size, big_endian>::do_get_global_symbol_counts(const Symbol_table*, | |
1069 | size_t*, size_t*) const | |
1070 | { | |
1071 | gold_unreachable(); | |
1072 | } | |
1073 | ||
dde3f402 ILT |
1074 | // Get symbols. Not used for plugin objects. |
1075 | ||
1076 | template<int size, bool big_endian> | |
1077 | const Object::Symbols* | |
1078 | Sized_pluginobj<size, big_endian>::do_get_global_symbols() const | |
1079 | { | |
1080 | gold_unreachable(); | |
1081 | } | |
1082 | ||
5995b570 | 1083 | // Class Plugin_finish. This task runs after all replacement files have |
78384e8f CC |
1084 | // been added. For now, it's a placeholder for a possible plugin API |
1085 | // to allow the plugin to release most of its resources. The cleanup | |
1086 | // handlers must be called later, because they can remove the temporary | |
1087 | // object files that are needed until the end of the link. | |
89fc3421 | 1088 | |
5995b570 | 1089 | class Plugin_finish : public Task |
89fc3421 CC |
1090 | { |
1091 | public: | |
5995b570 | 1092 | Plugin_finish(Task_token* this_blocker, Task_token* next_blocker) |
89fc3421 CC |
1093 | : this_blocker_(this_blocker), next_blocker_(next_blocker) |
1094 | { } | |
1095 | ||
5995b570 | 1096 | ~Plugin_finish() |
89fc3421 CC |
1097 | { |
1098 | if (this->this_blocker_ != NULL) | |
1099 | delete this->this_blocker_; | |
1100 | } | |
1101 | ||
1102 | Task_token* | |
1103 | is_runnable() | |
1104 | { | |
1105 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
1106 | return this->this_blocker_; | |
1107 | return NULL; | |
1108 | } | |
1109 | ||
1110 | void | |
1111 | locks(Task_locker* tl) | |
1112 | { tl->add(this, this->next_blocker_); } | |
1113 | ||
1114 | void | |
1115 | run(Workqueue*) | |
483620e8 | 1116 | { |
78384e8f | 1117 | // We could call early cleanup handlers here. |
483620e8 | 1118 | } |
89fc3421 CC |
1119 | |
1120 | std::string | |
1121 | get_name() const | |
5995b570 | 1122 | { return "Plugin_finish"; } |
89fc3421 CC |
1123 | |
1124 | private: | |
1125 | Task_token* this_blocker_; | |
1126 | Task_token* next_blocker_; | |
1127 | }; | |
1128 | ||
1129 | // Class Plugin_hook. | |
1130 | ||
1131 | Plugin_hook::~Plugin_hook() | |
1132 | { | |
1133 | } | |
1134 | ||
1135 | // Return whether a Plugin_hook task is runnable. | |
1136 | ||
1137 | Task_token* | |
1138 | Plugin_hook::is_runnable() | |
1139 | { | |
1140 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
1141 | return this->this_blocker_; | |
1142 | return NULL; | |
1143 | } | |
1144 | ||
1145 | // Return a Task_locker for a Plugin_hook task. We don't need any | |
1146 | // locks here. | |
1147 | ||
1148 | void | |
1149 | Plugin_hook::locks(Task_locker*) | |
1150 | { | |
1151 | } | |
1152 | ||
89fc3421 CC |
1153 | // Run the "all symbols read" plugin hook. |
1154 | ||
1155 | void | |
5995b570 | 1156 | Plugin_hook::run(Workqueue* workqueue) |
89fc3421 CC |
1157 | { |
1158 | gold_assert(this->options_.has_plugins()); | |
91ff43fe RÁE |
1159 | Symbol* start_sym; |
1160 | if (parameters->options().entry()) | |
1161 | start_sym = this->symtab_->lookup(parameters->options().entry()); | |
1162 | else | |
1163 | start_sym = this->symtab_->lookup("_start"); | |
1164 | if (start_sym != NULL) | |
1165 | start_sym->set_in_real_elf(); | |
1166 | ||
89fc3421 | 1167 | this->options_.plugins()->all_symbols_read(workqueue, |
0f7c0701 | 1168 | this, |
89fc3421 CC |
1169 | this->input_objects_, |
1170 | this->symtab_, | |
1171 | this->layout_, | |
1172 | this->dirpath_, | |
1173 | this->mapfile_, | |
1174 | &this->this_blocker_); | |
5995b570 CC |
1175 | workqueue->queue_soon(new Plugin_finish(this->this_blocker_, |
1176 | this->next_blocker_)); | |
89fc3421 CC |
1177 | } |
1178 | ||
1179 | // The C interface routines called by the plugins. | |
1180 | ||
1181 | #ifdef ENABLE_PLUGINS | |
1182 | ||
1183 | // Register a claim-file handler. | |
1184 | ||
1185 | static enum ld_plugin_status | |
1186 | register_claim_file(ld_plugin_claim_file_handler handler) | |
1187 | { | |
1188 | gold_assert(parameters->options().has_plugins()); | |
1189 | parameters->options().plugins()->set_claim_file_handler(handler); | |
1190 | return LDPS_OK; | |
1191 | } | |
1192 | ||
1193 | // Register an all-symbols-read handler. | |
1194 | ||
1195 | static enum ld_plugin_status | |
1196 | register_all_symbols_read(ld_plugin_all_symbols_read_handler handler) | |
1197 | { | |
1198 | gold_assert(parameters->options().has_plugins()); | |
1199 | parameters->options().plugins()->set_all_symbols_read_handler(handler); | |
1200 | return LDPS_OK; | |
1201 | } | |
1202 | ||
1203 | // Register a cleanup handler. | |
1204 | ||
1205 | static enum ld_plugin_status | |
1206 | register_cleanup(ld_plugin_cleanup_handler handler) | |
1207 | { | |
1208 | gold_assert(parameters->options().has_plugins()); | |
1209 | parameters->options().plugins()->set_cleanup_handler(handler); | |
1210 | return LDPS_OK; | |
1211 | } | |
1212 | ||
1213 | // Add symbols from a plugin-claimed input file. | |
1214 | ||
1215 | static enum ld_plugin_status | |
ca09d69a | 1216 | add_symbols(void* handle, int nsyms, const ld_plugin_symbol* syms) |
89fc3421 CC |
1217 | { |
1218 | gold_assert(parameters->options().has_plugins()); | |
1219 | Pluginobj* obj = parameters->options().plugins()->make_plugin_object( | |
1220 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
1221 | if (obj == NULL) | |
1222 | return LDPS_ERR; | |
1223 | obj->store_incoming_symbols(nsyms, syms); | |
1224 | return LDPS_OK; | |
1225 | } | |
1226 | ||
0f7c0701 CC |
1227 | // Get the input file information with an open (possibly re-opened) |
1228 | // file descriptor. | |
1229 | ||
1230 | static enum ld_plugin_status | |
ca09d69a | 1231 | get_input_file(const void* handle, struct ld_plugin_input_file* file) |
0f7c0701 CC |
1232 | { |
1233 | gold_assert(parameters->options().has_plugins()); | |
1234 | unsigned int obj_index = | |
1235 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
1236 | return parameters->options().plugins()->get_input_file(obj_index, file); | |
1237 | } | |
1238 | ||
1239 | // Release the input file. | |
1240 | ||
1241 | static enum ld_plugin_status | |
ca09d69a | 1242 | release_input_file(const void* handle) |
0f7c0701 CC |
1243 | { |
1244 | gold_assert(parameters->options().has_plugins()); | |
1245 | unsigned int obj_index = | |
1246 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
1247 | return parameters->options().plugins()->release_input_file(obj_index); | |
1248 | } | |
1249 | ||
89fc3421 CC |
1250 | // Get the symbol resolution info for a plugin-claimed input file. |
1251 | ||
1252 | static enum ld_plugin_status | |
ca09d69a | 1253 | get_symbols(const void* handle, int nsyms, ld_plugin_symbol* syms) |
89fc3421 CC |
1254 | { |
1255 | gold_assert(parameters->options().has_plugins()); | |
1256 | Pluginobj* obj = parameters->options().plugins()->object( | |
1257 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
1258 | if (obj == NULL) | |
1259 | return LDPS_ERR; | |
1260 | return obj->get_symbol_resolution_info(nsyms, syms); | |
1261 | } | |
1262 | ||
1263 | // Add a new (real) input file generated by a plugin. | |
1264 | ||
1265 | static enum ld_plugin_status | |
ca09d69a | 1266 | add_input_file(const char* pathname) |
89fc3421 CC |
1267 | { |
1268 | gold_assert(parameters->options().has_plugins()); | |
e99daf92 ILT |
1269 | return parameters->options().plugins()->add_input_file(pathname, false); |
1270 | } | |
1271 | ||
1272 | // Add a new (real) library required by a plugin. | |
1273 | ||
1274 | static enum ld_plugin_status | |
ca09d69a | 1275 | add_input_library(const char* pathname) |
e99daf92 ILT |
1276 | { |
1277 | gold_assert(parameters->options().has_plugins()); | |
1278 | return parameters->options().plugins()->add_input_file(pathname, true); | |
89fc3421 CC |
1279 | } |
1280 | ||
42218b9f RÁE |
1281 | // Set the extra library path to be used by libraries added via |
1282 | // add_input_library | |
1283 | ||
1284 | static enum ld_plugin_status | |
ca09d69a | 1285 | set_extra_library_path(const char* path) |
42218b9f RÁE |
1286 | { |
1287 | gold_assert(parameters->options().has_plugins()); | |
1288 | return parameters->options().plugins()->set_extra_library_path(path); | |
1289 | } | |
1290 | ||
89fc3421 CC |
1291 | // Issue a diagnostic message from a plugin. |
1292 | ||
1293 | static enum ld_plugin_status | |
ca09d69a | 1294 | message(int level, const char* format, ...) |
89fc3421 CC |
1295 | { |
1296 | va_list args; | |
1297 | va_start(args, format); | |
1298 | ||
1299 | switch (level) | |
1300 | { | |
1301 | case LDPL_INFO: | |
1302 | parameters->errors()->info(format, args); | |
1303 | break; | |
1304 | case LDPL_WARNING: | |
1305 | parameters->errors()->warning(format, args); | |
1306 | break; | |
1307 | case LDPL_ERROR: | |
1308 | default: | |
1309 | parameters->errors()->error(format, args); | |
1310 | break; | |
1311 | case LDPL_FATAL: | |
1312 | parameters->errors()->fatal(format, args); | |
1313 | break; | |
1314 | } | |
1315 | ||
1316 | va_end(args); | |
1317 | return LDPS_OK; | |
1318 | } | |
1319 | ||
1320 | #endif // ENABLE_PLUGINS | |
1321 | ||
1322 | // Allocate a Pluginobj object of the appropriate size and endianness. | |
1323 | ||
1324 | static Pluginobj* | |
0f7c0701 | 1325 | make_sized_plugin_object(Input_file* input_file, off_t offset, off_t filesize) |
89fc3421 | 1326 | { |
89fc3421 CC |
1327 | Pluginobj* obj = NULL; |
1328 | ||
029ba973 ILT |
1329 | parameters_force_valid_target(); |
1330 | const Target& target(parameters->target()); | |
89fc3421 | 1331 | |
029ba973 | 1332 | if (target.get_size() == 32) |
89fc3421 | 1333 | { |
029ba973 | 1334 | if (target.is_big_endian()) |
92f03fcb | 1335 | #ifdef HAVE_TARGET_32_BIG |
89fc3421 | 1336 | obj = new Sized_pluginobj<32, true>(input_file->filename(), |
0f7c0701 | 1337 | input_file, offset, filesize); |
92f03fcb CC |
1338 | #else |
1339 | gold_error(_("%s: not configured to support " | |
1340 | "32-bit big-endian object"), | |
1341 | input_file->filename().c_str()); | |
89fc3421 | 1342 | #endif |
89fc3421 | 1343 | else |
92f03fcb | 1344 | #ifdef HAVE_TARGET_32_LITTLE |
89fc3421 | 1345 | obj = new Sized_pluginobj<32, false>(input_file->filename(), |
0f7c0701 | 1346 | input_file, offset, filesize); |
92f03fcb CC |
1347 | #else |
1348 | gold_error(_("%s: not configured to support " | |
1349 | "32-bit little-endian object"), | |
1350 | input_file->filename().c_str()); | |
89fc3421 CC |
1351 | #endif |
1352 | } | |
029ba973 | 1353 | else if (target.get_size() == 64) |
89fc3421 | 1354 | { |
029ba973 | 1355 | if (target.is_big_endian()) |
92f03fcb | 1356 | #ifdef HAVE_TARGET_64_BIG |
89fc3421 | 1357 | obj = new Sized_pluginobj<64, true>(input_file->filename(), |
0f7c0701 | 1358 | input_file, offset, filesize); |
92f03fcb CC |
1359 | #else |
1360 | gold_error(_("%s: not configured to support " | |
1361 | "64-bit big-endian object"), | |
1362 | input_file->filename().c_str()); | |
89fc3421 | 1363 | #endif |
89fc3421 | 1364 | else |
92f03fcb | 1365 | #ifdef HAVE_TARGET_64_LITTLE |
89fc3421 | 1366 | obj = new Sized_pluginobj<64, false>(input_file->filename(), |
0f7c0701 | 1367 | input_file, offset, filesize); |
92f03fcb CC |
1368 | #else |
1369 | gold_error(_("%s: not configured to support " | |
1370 | "64-bit little-endian object"), | |
1371 | input_file->filename().c_str()); | |
89fc3421 CC |
1372 | #endif |
1373 | } | |
1374 | ||
1375 | gold_assert(obj != NULL); | |
89fc3421 CC |
1376 | return obj; |
1377 | } | |
1378 | ||
1379 | } // End namespace gold. |