Commit | Line | Data |
---|---|---|
6d03d481 | 1 | // plugin.cc -- plugin manager for gold -*- C++ -*- |
89fc3421 | 2 | |
0f7c0701 | 3 | // Copyright 2008, 2009 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 | ||
23 | #include <cstdio> | |
24 | #include <cstdarg> | |
25 | #include <cstring> | |
26 | #include <string> | |
27 | #include <vector> | |
28 | #include <dlfcn.h> | |
29 | ||
30 | #include "gold.h" | |
31 | #include "parameters.h" | |
32 | #include "errors.h" | |
33 | #include "fileread.h" | |
34 | #include "layout.h" | |
35 | #include "options.h" | |
36 | #include "plugin.h" | |
37 | #include "target.h" | |
38 | #include "readsyms.h" | |
39 | #include "symtab.h" | |
40 | #include "elfcpp.h" | |
41 | ||
42 | namespace gold | |
43 | { | |
44 | ||
45 | #ifdef ENABLE_PLUGINS | |
46 | ||
47 | // The linker's exported interfaces. | |
48 | ||
49 | extern "C" | |
50 | { | |
51 | ||
52 | static enum ld_plugin_status | |
53 | register_claim_file(ld_plugin_claim_file_handler handler); | |
54 | ||
55 | static enum ld_plugin_status | |
56 | register_all_symbols_read(ld_plugin_all_symbols_read_handler handler); | |
57 | ||
58 | static enum ld_plugin_status | |
59 | register_cleanup(ld_plugin_cleanup_handler handler); | |
60 | ||
61 | static enum ld_plugin_status | |
62 | add_symbols(void *handle, int nsyms, const struct ld_plugin_symbol *syms); | |
63 | ||
0f7c0701 CC |
64 | static enum ld_plugin_status |
65 | get_input_file(const void *handle, struct ld_plugin_input_file *file); | |
66 | ||
67 | static enum ld_plugin_status | |
68 | release_input_file(const void *handle); | |
69 | ||
89fc3421 CC |
70 | static enum ld_plugin_status |
71 | get_symbols(const void *handle, int nsyms, struct ld_plugin_symbol *syms); | |
72 | ||
73 | static enum ld_plugin_status | |
74 | add_input_file(char *pathname); | |
75 | ||
76 | static enum ld_plugin_status | |
6c52134c | 77 | message(int level, const char *format, ...); |
89fc3421 CC |
78 | |
79 | }; | |
80 | ||
81 | #endif // ENABLE_PLUGINS | |
82 | ||
83 | static Pluginobj* make_sized_plugin_object(Input_file* input_file, | |
0f7c0701 | 84 | off_t offset, off_t filesize); |
89fc3421 CC |
85 | |
86 | // Plugin methods. | |
87 | ||
88 | // Load one plugin library. | |
89 | ||
90 | void | |
91 | Plugin::load() | |
92 | { | |
93 | #ifdef ENABLE_PLUGINS | |
89fc3421 CC |
94 | // Load the plugin library. |
95 | // FIXME: Look for the library in standard locations. | |
4674ecfc | 96 | this->handle_ = dlopen(this->filename_.c_str(), RTLD_NOW); |
89fc3421 CC |
97 | if (this->handle_ == NULL) |
98 | { | |
4674ecfc CC |
99 | gold_error(_("%s: could not load plugin library"), |
100 | this->filename_.c_str()); | |
89fc3421 CC |
101 | return; |
102 | } | |
103 | ||
104 | // Find the plugin's onload entry point. | |
105 | ld_plugin_onload onload = reinterpret_cast<ld_plugin_onload> | |
106 | (dlsym(this->handle_, "onload")); | |
107 | if (onload == NULL) | |
108 | { | |
4674ecfc CC |
109 | gold_error(_("%s: could not find onload entry point"), |
110 | this->filename_.c_str()); | |
89fc3421 CC |
111 | return; |
112 | } | |
113 | ||
114 | // Get the linker's version number. | |
115 | const char* ver = get_version_string(); | |
116 | int major = 0; | |
117 | int minor = 0; | |
118 | sscanf(ver, "%d.%d", &major, &minor); | |
119 | ||
120 | // Allocate and populate a transfer vector. | |
0f7c0701 | 121 | const int tv_fixed_size = 13; |
4674ecfc | 122 | int tv_size = this->args_.size() + tv_fixed_size; |
89fc3421 CC |
123 | ld_plugin_tv *tv = new ld_plugin_tv[tv_size]; |
124 | ||
abc8dcba CC |
125 | // Put LDPT_MESSAGE at the front of the list so the plugin can use it |
126 | // while processing subsequent entries. | |
89fc3421 | 127 | int i = 0; |
abc8dcba CC |
128 | tv[i].tv_tag = LDPT_MESSAGE; |
129 | tv[i].tv_u.tv_message = message; | |
130 | ||
131 | ++i; | |
89fc3421 CC |
132 | tv[i].tv_tag = LDPT_API_VERSION; |
133 | tv[i].tv_u.tv_val = LD_PLUGIN_API_VERSION; | |
134 | ||
135 | ++i; | |
136 | tv[i].tv_tag = LDPT_GOLD_VERSION; | |
137 | tv[i].tv_u.tv_val = major * 100 + minor; | |
138 | ||
139 | ++i; | |
140 | tv[i].tv_tag = LDPT_LINKER_OUTPUT; | |
141 | if (parameters->options().relocatable()) | |
142 | tv[i].tv_u.tv_val = LDPO_REL; | |
143 | else if (parameters->options().shared()) | |
144 | tv[i].tv_u.tv_val = LDPO_DYN; | |
145 | else | |
146 | tv[i].tv_u.tv_val = LDPO_EXEC; | |
147 | ||
4674ecfc | 148 | for (unsigned int j = 0; j < this->args_.size(); ++j) |
89fc3421 CC |
149 | { |
150 | ++i; | |
151 | tv[i].tv_tag = LDPT_OPTION; | |
4674ecfc | 152 | tv[i].tv_u.tv_string = this->args_[j].c_str(); |
89fc3421 CC |
153 | } |
154 | ||
155 | ++i; | |
156 | tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK; | |
157 | tv[i].tv_u.tv_register_claim_file = register_claim_file; | |
158 | ||
159 | ++i; | |
160 | tv[i].tv_tag = LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK; | |
161 | tv[i].tv_u.tv_register_all_symbols_read = register_all_symbols_read; | |
162 | ||
163 | ++i; | |
164 | tv[i].tv_tag = LDPT_REGISTER_CLEANUP_HOOK; | |
165 | tv[i].tv_u.tv_register_cleanup = register_cleanup; | |
166 | ||
167 | ++i; | |
168 | tv[i].tv_tag = LDPT_ADD_SYMBOLS; | |
169 | tv[i].tv_u.tv_add_symbols = add_symbols; | |
170 | ||
0f7c0701 CC |
171 | ++i; |
172 | tv[i].tv_tag = LDPT_GET_INPUT_FILE; | |
173 | tv[i].tv_u.tv_get_input_file = get_input_file; | |
174 | ||
175 | ++i; | |
176 | tv[i].tv_tag = LDPT_RELEASE_INPUT_FILE; | |
177 | tv[i].tv_u.tv_release_input_file = release_input_file; | |
178 | ||
89fc3421 CC |
179 | ++i; |
180 | tv[i].tv_tag = LDPT_GET_SYMBOLS; | |
181 | tv[i].tv_u.tv_get_symbols = get_symbols; | |
182 | ||
183 | ++i; | |
184 | tv[i].tv_tag = LDPT_ADD_INPUT_FILE; | |
185 | tv[i].tv_u.tv_add_input_file = add_input_file; | |
186 | ||
89fc3421 CC |
187 | ++i; |
188 | tv[i].tv_tag = LDPT_NULL; | |
189 | tv[i].tv_u.tv_val = 0; | |
190 | ||
191 | gold_assert(i == tv_size - 1); | |
192 | ||
193 | // Call the onload entry point. | |
194 | (*onload)(tv); | |
195 | ||
6c52134c | 196 | delete[] tv; |
89fc3421 CC |
197 | #endif // ENABLE_PLUGINS |
198 | } | |
199 | ||
200 | // Call the plugin claim-file handler. | |
201 | ||
202 | inline bool | |
203 | Plugin::claim_file(struct ld_plugin_input_file *plugin_input_file) | |
204 | { | |
205 | int claimed = 0; | |
206 | ||
207 | if (this->claim_file_handler_ != NULL) | |
208 | { | |
209 | (*this->claim_file_handler_)(plugin_input_file, &claimed); | |
210 | if (claimed) | |
211 | return true; | |
212 | } | |
213 | return false; | |
214 | } | |
215 | ||
216 | // Call the all-symbols-read handler. | |
217 | ||
218 | inline void | |
219 | Plugin::all_symbols_read() | |
220 | { | |
221 | if (this->all_symbols_read_handler_ != NULL) | |
222 | (*this->all_symbols_read_handler_)(); | |
223 | } | |
224 | ||
225 | // Call the cleanup handler. | |
226 | ||
227 | inline void | |
228 | Plugin::cleanup() | |
229 | { | |
230 | if (this->cleanup_handler_ != NULL) | |
231 | (*this->cleanup_handler_)(); | |
232 | } | |
233 | ||
234 | // Plugin_manager methods. | |
235 | ||
236 | Plugin_manager::~Plugin_manager() | |
237 | { | |
238 | for (Plugin_list::iterator p = this->plugins_.begin(); | |
239 | p != this->plugins_.end(); | |
240 | ++p) | |
241 | delete *p; | |
242 | this->plugins_.clear(); | |
243 | for (Object_list::iterator obj = this->objects_.begin(); | |
244 | obj != this->objects_.end(); | |
245 | ++obj) | |
246 | delete *obj; | |
247 | this->objects_.clear(); | |
248 | } | |
249 | ||
250 | // Load all plugin libraries. | |
251 | ||
252 | void | |
253 | Plugin_manager::load_plugins() | |
254 | { | |
255 | for (this->current_ = this->plugins_.begin(); | |
256 | this->current_ != this->plugins_.end(); | |
257 | ++this->current_) | |
258 | (*this->current_)->load(); | |
259 | } | |
260 | ||
261 | // Call the plugin claim-file handlers in turn to see if any claim the file. | |
262 | ||
263 | Pluginobj* | |
264 | Plugin_manager::claim_file(Input_file* input_file, off_t offset, | |
265 | off_t filesize) | |
266 | { | |
267 | if (this->in_replacement_phase_) | |
268 | return NULL; | |
269 | ||
270 | unsigned int handle = this->objects_.size(); | |
271 | this->input_file_ = input_file; | |
272 | this->plugin_input_file_.name = input_file->filename().c_str(); | |
273 | this->plugin_input_file_.fd = input_file->file().descriptor(); | |
274 | this->plugin_input_file_.offset = offset; | |
275 | this->plugin_input_file_.filesize = filesize; | |
276 | this->plugin_input_file_.handle = reinterpret_cast<void*>(handle); | |
277 | ||
278 | for (this->current_ = this->plugins_.begin(); | |
279 | this->current_ != this->plugins_.end(); | |
280 | ++this->current_) | |
281 | { | |
282 | if ((*this->current_)->claim_file(&this->plugin_input_file_)) | |
283 | { | |
abc8dcba CC |
284 | if (this->objects_.size() > handle) |
285 | return this->objects_[handle]; | |
286 | ||
287 | // If the plugin claimed the file but did not call the | |
288 | // add_symbols callback, we need to create the Pluginobj now. | |
289 | Pluginobj* obj = this->make_plugin_object(handle); | |
290 | return obj; | |
89fc3421 CC |
291 | } |
292 | } | |
293 | ||
294 | return NULL; | |
295 | } | |
296 | ||
297 | // Call the all-symbols-read handlers. | |
298 | ||
299 | void | |
0f7c0701 | 300 | Plugin_manager::all_symbols_read(Workqueue* workqueue, Task* task, |
89fc3421 CC |
301 | Input_objects* input_objects, |
302 | Symbol_table* symtab, Layout* layout, | |
303 | Dirsearch* dirpath, Mapfile* mapfile, | |
304 | Task_token** last_blocker) | |
305 | { | |
306 | this->in_replacement_phase_ = true; | |
307 | this->workqueue_ = workqueue; | |
0f7c0701 | 308 | this->task_ = task; |
89fc3421 CC |
309 | this->input_objects_ = input_objects; |
310 | this->symtab_ = symtab; | |
311 | this->layout_ = layout; | |
312 | this->dirpath_ = dirpath; | |
313 | this->mapfile_ = mapfile; | |
314 | this->this_blocker_ = NULL; | |
315 | ||
316 | for (this->current_ = this->plugins_.begin(); | |
317 | this->current_ != this->plugins_.end(); | |
318 | ++this->current_) | |
319 | (*this->current_)->all_symbols_read(); | |
320 | ||
321 | *last_blocker = this->this_blocker_; | |
322 | } | |
323 | ||
483620e8 | 324 | // Layout deferred objects. |
89fc3421 CC |
325 | |
326 | void | |
483620e8 | 327 | Plugin_manager::layout_deferred_objects() |
89fc3421 | 328 | { |
5995b570 CC |
329 | Deferred_layout_list::iterator obj; |
330 | ||
331 | for (obj = this->deferred_layout_objects_.begin(); | |
332 | obj != this->deferred_layout_objects_.end(); | |
333 | ++obj) | |
334 | (*obj)->layout_deferred_sections(this->layout_); | |
483620e8 CC |
335 | } |
336 | ||
337 | // Call the cleanup handlers. | |
5995b570 | 338 | |
483620e8 CC |
339 | void |
340 | Plugin_manager::cleanup() | |
341 | { | |
342 | if (this->cleanup_done_) | |
343 | return; | |
89fc3421 CC |
344 | for (this->current_ = this->plugins_.begin(); |
345 | this->current_ != this->plugins_.end(); | |
346 | ++this->current_) | |
347 | (*this->current_)->cleanup(); | |
483620e8 | 348 | this->cleanup_done_ = true; |
89fc3421 CC |
349 | } |
350 | ||
351 | // Make a new Pluginobj object. This is called when the plugin calls | |
352 | // the add_symbols API. | |
353 | ||
354 | Pluginobj* | |
355 | Plugin_manager::make_plugin_object(unsigned int handle) | |
356 | { | |
357 | // Make sure we aren't asked to make an object for the same handle twice. | |
358 | if (this->objects_.size() != handle) | |
359 | return NULL; | |
360 | ||
361 | Pluginobj* obj = make_sized_plugin_object(this->input_file_, | |
0f7c0701 CC |
362 | this->plugin_input_file_.offset, |
363 | this->plugin_input_file_.filesize); | |
89fc3421 CC |
364 | this->objects_.push_back(obj); |
365 | return obj; | |
366 | } | |
367 | ||
0f7c0701 CC |
368 | // Get the input file information with an open (possibly re-opened) |
369 | // file descriptor. | |
370 | ||
371 | ld_plugin_status | |
372 | Plugin_manager::get_input_file(unsigned int handle, | |
373 | struct ld_plugin_input_file *file) | |
374 | { | |
375 | Pluginobj* obj = this->object(handle); | |
376 | if (obj == NULL) | |
377 | return LDPS_BAD_HANDLE; | |
378 | ||
379 | obj->lock(this->task_); | |
380 | file->name = obj->filename().c_str(); | |
381 | file->fd = obj->descriptor(); | |
382 | file->offset = obj->offset(); | |
383 | file->filesize = obj->filesize(); | |
384 | file->handle = reinterpret_cast<void*>(handle); | |
385 | return LDPS_OK; | |
386 | } | |
387 | ||
388 | // Release the input file. | |
389 | ||
390 | ld_plugin_status | |
391 | Plugin_manager::release_input_file(unsigned int handle) | |
392 | { | |
393 | Pluginobj* obj = this->object(handle); | |
394 | if (obj == NULL) | |
395 | return LDPS_BAD_HANDLE; | |
396 | ||
397 | obj->unlock(this->task_); | |
398 | return LDPS_OK; | |
399 | } | |
400 | ||
89fc3421 CC |
401 | // Add a new input file. |
402 | ||
403 | ld_plugin_status | |
404 | Plugin_manager::add_input_file(char *pathname) | |
405 | { | |
406 | Input_file_argument file(pathname, false, "", false, this->options_); | |
407 | Input_argument* input_argument = new Input_argument(file); | |
408 | Task_token* next_blocker = new Task_token(true); | |
409 | next_blocker->add_blocker(); | |
410 | this->workqueue_->queue_soon(new Read_symbols(this->options_, | |
411 | this->input_objects_, | |
412 | this->symtab_, | |
413 | this->layout_, | |
414 | this->dirpath_, | |
415 | this->mapfile_, | |
416 | input_argument, | |
417 | NULL, | |
418 | this->this_blocker_, | |
419 | next_blocker)); | |
420 | this->this_blocker_ = next_blocker; | |
421 | return LDPS_OK; | |
422 | } | |
423 | ||
424 | // Class Pluginobj. | |
425 | ||
426 | Pluginobj::Pluginobj(const std::string& name, Input_file* input_file, | |
0f7c0701 | 427 | off_t offset, off_t filesize) |
89fc3421 | 428 | : Object(name, input_file, false, offset), |
0f7c0701 | 429 | nsyms_(0), syms_(NULL), symbols_(), filesize_(filesize), comdat_map_() |
89fc3421 CC |
430 | { |
431 | } | |
432 | ||
d66a9eb3 CC |
433 | // Return TRUE if a defined symbol might be reachable from outside the |
434 | // universe of claimed objects. | |
435 | ||
436 | static inline bool | |
437 | is_visible_from_outside(Symbol* lsym) | |
438 | { | |
439 | if (lsym->in_real_elf()) | |
440 | return true; | |
441 | if (parameters->options().relocatable()) | |
442 | return true; | |
443 | if (parameters->options().export_dynamic() || parameters->options().shared()) | |
444 | return lsym->is_externally_visible(); | |
445 | return false; | |
446 | } | |
447 | ||
89fc3421 CC |
448 | // Get symbol resolution info. |
449 | ||
450 | ld_plugin_status | |
451 | Pluginobj::get_symbol_resolution_info(int nsyms, ld_plugin_symbol* syms) const | |
452 | { | |
abc8dcba | 453 | if (nsyms > this->nsyms_) |
89fc3421 CC |
454 | return LDPS_NO_SYMS; |
455 | for (int i = 0; i < nsyms; i++) | |
456 | { | |
457 | ld_plugin_symbol* isym = &syms[i]; | |
458 | Symbol* lsym = this->symbols_[i]; | |
459 | ld_plugin_symbol_resolution res = LDPR_UNKNOWN; | |
460 | ||
461 | if (lsym->is_undefined()) | |
462 | // The symbol remains undefined. | |
463 | res = LDPR_UNDEF; | |
464 | else if (isym->def == LDPK_UNDEF | |
465 | || isym->def == LDPK_WEAKUNDEF | |
466 | || isym->def == LDPK_COMMON) | |
467 | { | |
468 | // The original symbol was undefined or common. | |
469 | if (lsym->source() != Symbol::FROM_OBJECT) | |
470 | res = LDPR_RESOLVED_EXEC; | |
471 | else if (lsym->object()->pluginobj() != NULL) | |
472 | res = LDPR_RESOLVED_IR; | |
473 | else if (lsym->object()->is_dynamic()) | |
474 | res = LDPR_RESOLVED_DYN; | |
475 | else | |
476 | res = LDPR_RESOLVED_EXEC; | |
477 | } | |
478 | else | |
479 | { | |
480 | // The original symbol was a definition. | |
481 | if (lsym->source() != Symbol::FROM_OBJECT) | |
482 | res = LDPR_PREEMPTED_REG; | |
483 | else if (lsym->object() == static_cast<const Object*>(this)) | |
d66a9eb3 | 484 | res = (is_visible_from_outside(lsym) |
89fc3421 CC |
485 | ? LDPR_PREVAILING_DEF |
486 | : LDPR_PREVAILING_DEF_IRONLY); | |
487 | else | |
488 | res = (lsym->object()->pluginobj() != NULL | |
489 | ? LDPR_PREEMPTED_IR | |
490 | : LDPR_PREEMPTED_REG); | |
491 | } | |
492 | isym->resolution = res; | |
493 | } | |
494 | return LDPS_OK; | |
495 | } | |
496 | ||
497 | // Return TRUE if the comdat group with key COMDAT_KEY from this object | |
498 | // should be kept. | |
499 | ||
500 | bool | |
501 | Pluginobj::include_comdat_group(std::string comdat_key, Layout* layout) | |
502 | { | |
503 | std::pair<Comdat_map::iterator, bool> ins = | |
504 | this->comdat_map_.insert(std::make_pair(comdat_key, false)); | |
505 | ||
506 | // If this is the first time we've seen this comdat key, ask the | |
507 | // layout object whether it should be included. | |
508 | if (ins.second) | |
509 | ins.first->second = layout->add_comdat(NULL, 1, comdat_key, true); | |
510 | ||
511 | return ins.first->second; | |
512 | } | |
513 | ||
514 | // Class Sized_pluginobj. | |
515 | ||
516 | template<int size, bool big_endian> | |
517 | Sized_pluginobj<size, big_endian>::Sized_pluginobj( | |
518 | const std::string& name, | |
519 | Input_file* input_file, | |
0f7c0701 CC |
520 | off_t offset, |
521 | off_t filesize) | |
522 | : Pluginobj(name, input_file, offset, filesize) | |
89fc3421 CC |
523 | { |
524 | } | |
525 | ||
526 | // Read the symbols. Not used for plugin objects. | |
527 | ||
528 | template<int size, bool big_endian> | |
529 | void | |
530 | Sized_pluginobj<size, big_endian>::do_read_symbols(Read_symbols_data*) | |
531 | { | |
532 | gold_unreachable(); | |
533 | } | |
534 | ||
535 | // Lay out the input sections. Not used for plugin objects. | |
536 | ||
537 | template<int size, bool big_endian> | |
538 | void | |
539 | Sized_pluginobj<size, big_endian>::do_layout(Symbol_table*, Layout*, | |
540 | Read_symbols_data*) | |
541 | { | |
542 | gold_unreachable(); | |
543 | } | |
544 | ||
545 | // Add the symbols to the symbol table. | |
546 | ||
547 | template<int size, bool big_endian> | |
548 | void | |
549 | Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table*, | |
550 | Read_symbols_data*) | |
551 | { | |
552 | gold_unreachable(); | |
553 | } | |
554 | ||
555 | template<int size, bool big_endian> | |
556 | void | |
557 | Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table* symtab, | |
558 | Layout* layout) | |
559 | { | |
560 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
561 | unsigned char symbuf[sym_size]; | |
562 | elfcpp::Sym<size, big_endian> sym(symbuf); | |
563 | elfcpp::Sym_write<size, big_endian> osym(symbuf); | |
564 | ||
565 | typedef typename elfcpp::Elf_types<size>::Elf_WXword Elf_size_type; | |
566 | ||
567 | this->symbols_.resize(this->nsyms_); | |
568 | ||
569 | for (int i = 0; i < this->nsyms_; ++i) | |
570 | { | |
571 | const struct ld_plugin_symbol *isym = &this->syms_[i]; | |
572 | const char* name = isym->name; | |
573 | const char* ver = isym->version; | |
574 | elfcpp::Elf_Half shndx; | |
575 | elfcpp::STB bind; | |
576 | elfcpp::STV vis; | |
577 | ||
578 | if (name != NULL && name[0] == '\0') | |
579 | name = NULL; | |
580 | if (ver != NULL && ver[0] == '\0') | |
581 | ver = NULL; | |
582 | ||
583 | switch (isym->def) | |
584 | { | |
585 | case LDPK_WEAKDEF: | |
586 | case LDPK_WEAKUNDEF: | |
587 | bind = elfcpp::STB_WEAK; | |
588 | break; | |
589 | case LDPK_DEF: | |
590 | case LDPK_UNDEF: | |
591 | case LDPK_COMMON: | |
592 | default: | |
593 | bind = elfcpp::STB_GLOBAL; | |
594 | break; | |
595 | } | |
596 | ||
597 | switch (isym->def) | |
598 | { | |
599 | case LDPK_DEF: | |
600 | case LDPK_WEAKDEF: | |
601 | shndx = elfcpp::SHN_ABS; | |
602 | break; | |
603 | case LDPK_COMMON: | |
604 | shndx = elfcpp::SHN_COMMON; | |
605 | break; | |
606 | case LDPK_UNDEF: | |
607 | case LDPK_WEAKUNDEF: | |
608 | default: | |
609 | shndx = elfcpp::SHN_UNDEF; | |
610 | break; | |
611 | } | |
612 | ||
613 | switch (isym->visibility) | |
614 | { | |
615 | case LDPV_PROTECTED: | |
616 | vis = elfcpp::STV_DEFAULT; | |
617 | break; | |
618 | case LDPV_INTERNAL: | |
619 | vis = elfcpp::STV_DEFAULT; | |
620 | break; | |
621 | case LDPV_HIDDEN: | |
622 | vis = elfcpp::STV_DEFAULT; | |
623 | break; | |
624 | case LDPV_DEFAULT: | |
625 | default: | |
626 | vis = elfcpp::STV_DEFAULT; | |
627 | break; | |
628 | } | |
629 | ||
630 | if (isym->comdat_key != NULL | |
631 | && isym->comdat_key[0] != '\0' | |
632 | && !this->include_comdat_group(isym->comdat_key, layout)) | |
633 | shndx = elfcpp::SHN_UNDEF; | |
634 | ||
635 | osym.put_st_name(0); | |
636 | osym.put_st_value(0); | |
637 | osym.put_st_size(static_cast<Elf_size_type>(isym->size)); | |
638 | osym.put_st_info(bind, elfcpp::STT_NOTYPE); | |
639 | osym.put_st_other(vis, 0); | |
640 | osym.put_st_shndx(shndx); | |
641 | ||
642 | this->symbols_[i] = | |
643 | symtab->add_from_pluginobj<size, big_endian>(this, name, ver, &sym); | |
644 | } | |
645 | } | |
646 | ||
647 | // Get the size of a section. Not used for plugin objects. | |
648 | ||
649 | template<int size, bool big_endian> | |
650 | uint64_t | |
651 | Sized_pluginobj<size, big_endian>::do_section_size(unsigned int) | |
652 | { | |
653 | gold_unreachable(); | |
654 | return 0; | |
655 | } | |
656 | ||
657 | // Get the name of a section. Not used for plugin objects. | |
658 | ||
659 | template<int size, bool big_endian> | |
660 | std::string | |
661 | Sized_pluginobj<size, big_endian>::do_section_name(unsigned int) | |
662 | { | |
663 | gold_unreachable(); | |
664 | return std::string(); | |
665 | } | |
666 | ||
667 | // Return a view of the contents of a section. Not used for plugin objects. | |
668 | ||
669 | template<int size, bool big_endian> | |
670 | Object::Location | |
671 | Sized_pluginobj<size, big_endian>::do_section_contents(unsigned int) | |
672 | { | |
673 | Location loc(0, 0); | |
674 | ||
675 | gold_unreachable(); | |
676 | return loc; | |
677 | } | |
678 | ||
679 | // Return section flags. Not used for plugin objects. | |
680 | ||
681 | template<int size, bool big_endian> | |
682 | uint64_t | |
683 | Sized_pluginobj<size, big_endian>::do_section_flags(unsigned int) | |
684 | { | |
685 | gold_unreachable(); | |
686 | return 0; | |
687 | } | |
688 | ||
689 | // Return section address. Not used for plugin objects. | |
690 | ||
691 | template<int size, bool big_endian> | |
692 | uint64_t | |
693 | Sized_pluginobj<size, big_endian>::do_section_address(unsigned int) | |
694 | { | |
695 | gold_unreachable(); | |
696 | return 0; | |
697 | } | |
698 | ||
699 | // Return section type. Not used for plugin objects. | |
700 | ||
701 | template<int size, bool big_endian> | |
702 | unsigned int | |
703 | Sized_pluginobj<size, big_endian>::do_section_type(unsigned int) | |
704 | { | |
705 | gold_unreachable(); | |
706 | return 0; | |
707 | } | |
708 | ||
709 | // Return the section link field. Not used for plugin objects. | |
710 | ||
711 | template<int size, bool big_endian> | |
712 | unsigned int | |
713 | Sized_pluginobj<size, big_endian>::do_section_link(unsigned int) | |
714 | { | |
715 | gold_unreachable(); | |
716 | return 0; | |
717 | } | |
718 | ||
719 | // Return the section link field. Not used for plugin objects. | |
720 | ||
721 | template<int size, bool big_endian> | |
722 | unsigned int | |
723 | Sized_pluginobj<size, big_endian>::do_section_info(unsigned int) | |
724 | { | |
725 | gold_unreachable(); | |
726 | return 0; | |
727 | } | |
728 | ||
729 | // Return the section alignment. Not used for plugin objects. | |
730 | ||
731 | template<int size, bool big_endian> | |
732 | uint64_t | |
733 | Sized_pluginobj<size, big_endian>::do_section_addralign(unsigned int) | |
734 | { | |
735 | gold_unreachable(); | |
736 | return 0; | |
737 | } | |
738 | ||
739 | // Return the Xindex structure to use. Not used for plugin objects. | |
740 | ||
741 | template<int size, bool big_endian> | |
742 | Xindex* | |
743 | Sized_pluginobj<size, big_endian>::do_initialize_xindex() | |
744 | { | |
745 | gold_unreachable(); | |
746 | return NULL; | |
747 | } | |
748 | ||
749 | // Get symbol counts. Not used for plugin objects. | |
750 | ||
751 | template<int size, bool big_endian> | |
752 | void | |
753 | Sized_pluginobj<size, big_endian>::do_get_global_symbol_counts(const Symbol_table*, | |
754 | size_t*, size_t*) const | |
755 | { | |
756 | gold_unreachable(); | |
757 | } | |
758 | ||
759 | // Class Add_plugin_symbols. | |
760 | ||
761 | Add_plugin_symbols::~Add_plugin_symbols() | |
762 | { | |
763 | if (this->this_blocker_ != NULL) | |
764 | delete this->this_blocker_; | |
765 | // next_blocker_ is deleted by the task associated with the next | |
766 | // input file. | |
767 | } | |
768 | ||
769 | // We are blocked by this_blocker_. We block next_blocker_. We also | |
770 | // lock the file. | |
771 | ||
772 | Task_token* | |
773 | Add_plugin_symbols::is_runnable() | |
774 | { | |
775 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
776 | return this->this_blocker_; | |
777 | if (this->obj_->is_locked()) | |
778 | return this->obj_->token(); | |
779 | return NULL; | |
780 | } | |
781 | ||
782 | void | |
783 | Add_plugin_symbols::locks(Task_locker* tl) | |
784 | { | |
785 | tl->add(this, this->next_blocker_); | |
786 | tl->add(this, this->obj_->token()); | |
787 | } | |
788 | ||
789 | // Add the symbols in the object to the symbol table. | |
790 | ||
791 | void | |
792 | Add_plugin_symbols::run(Workqueue*) | |
793 | { | |
794 | this->obj_->add_symbols(this->symtab_, this->layout_); | |
795 | } | |
796 | ||
5995b570 | 797 | // Class Plugin_finish. This task runs after all replacement files have |
6d03d481 | 798 | // been added. It calls each plugin's cleanup handler. |
89fc3421 | 799 | |
5995b570 | 800 | class Plugin_finish : public Task |
89fc3421 CC |
801 | { |
802 | public: | |
5995b570 | 803 | Plugin_finish(Task_token* this_blocker, Task_token* next_blocker) |
89fc3421 CC |
804 | : this_blocker_(this_blocker), next_blocker_(next_blocker) |
805 | { } | |
806 | ||
5995b570 | 807 | ~Plugin_finish() |
89fc3421 CC |
808 | { |
809 | if (this->this_blocker_ != NULL) | |
810 | delete this->this_blocker_; | |
811 | } | |
812 | ||
813 | Task_token* | |
814 | is_runnable() | |
815 | { | |
816 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
817 | return this->this_blocker_; | |
818 | return NULL; | |
819 | } | |
820 | ||
821 | void | |
822 | locks(Task_locker* tl) | |
823 | { tl->add(this, this->next_blocker_); } | |
824 | ||
825 | void | |
826 | run(Workqueue*) | |
483620e8 CC |
827 | { |
828 | Plugin_manager* plugins = parameters->options().plugins(); | |
829 | gold_assert(plugins != NULL); | |
483620e8 CC |
830 | plugins->cleanup(); |
831 | } | |
89fc3421 CC |
832 | |
833 | std::string | |
834 | get_name() const | |
5995b570 | 835 | { return "Plugin_finish"; } |
89fc3421 CC |
836 | |
837 | private: | |
838 | Task_token* this_blocker_; | |
839 | Task_token* next_blocker_; | |
840 | }; | |
841 | ||
842 | // Class Plugin_hook. | |
843 | ||
844 | Plugin_hook::~Plugin_hook() | |
845 | { | |
846 | } | |
847 | ||
848 | // Return whether a Plugin_hook task is runnable. | |
849 | ||
850 | Task_token* | |
851 | Plugin_hook::is_runnable() | |
852 | { | |
853 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
854 | return this->this_blocker_; | |
855 | return NULL; | |
856 | } | |
857 | ||
858 | // Return a Task_locker for a Plugin_hook task. We don't need any | |
859 | // locks here. | |
860 | ||
861 | void | |
862 | Plugin_hook::locks(Task_locker*) | |
863 | { | |
864 | } | |
865 | ||
89fc3421 CC |
866 | // Run the "all symbols read" plugin hook. |
867 | ||
868 | void | |
5995b570 | 869 | Plugin_hook::run(Workqueue* workqueue) |
89fc3421 CC |
870 | { |
871 | gold_assert(this->options_.has_plugins()); | |
872 | this->options_.plugins()->all_symbols_read(workqueue, | |
0f7c0701 | 873 | this, |
89fc3421 CC |
874 | this->input_objects_, |
875 | this->symtab_, | |
876 | this->layout_, | |
877 | this->dirpath_, | |
878 | this->mapfile_, | |
879 | &this->this_blocker_); | |
5995b570 CC |
880 | workqueue->queue_soon(new Plugin_finish(this->this_blocker_, |
881 | this->next_blocker_)); | |
89fc3421 CC |
882 | } |
883 | ||
884 | // The C interface routines called by the plugins. | |
885 | ||
886 | #ifdef ENABLE_PLUGINS | |
887 | ||
888 | // Register a claim-file handler. | |
889 | ||
890 | static enum ld_plugin_status | |
891 | register_claim_file(ld_plugin_claim_file_handler handler) | |
892 | { | |
893 | gold_assert(parameters->options().has_plugins()); | |
894 | parameters->options().plugins()->set_claim_file_handler(handler); | |
895 | return LDPS_OK; | |
896 | } | |
897 | ||
898 | // Register an all-symbols-read handler. | |
899 | ||
900 | static enum ld_plugin_status | |
901 | register_all_symbols_read(ld_plugin_all_symbols_read_handler handler) | |
902 | { | |
903 | gold_assert(parameters->options().has_plugins()); | |
904 | parameters->options().plugins()->set_all_symbols_read_handler(handler); | |
905 | return LDPS_OK; | |
906 | } | |
907 | ||
908 | // Register a cleanup handler. | |
909 | ||
910 | static enum ld_plugin_status | |
911 | register_cleanup(ld_plugin_cleanup_handler handler) | |
912 | { | |
913 | gold_assert(parameters->options().has_plugins()); | |
914 | parameters->options().plugins()->set_cleanup_handler(handler); | |
915 | return LDPS_OK; | |
916 | } | |
917 | ||
918 | // Add symbols from a plugin-claimed input file. | |
919 | ||
920 | static enum ld_plugin_status | |
921 | add_symbols(void* handle, int nsyms, const ld_plugin_symbol *syms) | |
922 | { | |
923 | gold_assert(parameters->options().has_plugins()); | |
924 | Pluginobj* obj = parameters->options().plugins()->make_plugin_object( | |
925 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
926 | if (obj == NULL) | |
927 | return LDPS_ERR; | |
928 | obj->store_incoming_symbols(nsyms, syms); | |
929 | return LDPS_OK; | |
930 | } | |
931 | ||
0f7c0701 CC |
932 | // Get the input file information with an open (possibly re-opened) |
933 | // file descriptor. | |
934 | ||
935 | static enum ld_plugin_status | |
936 | get_input_file(const void *handle, struct ld_plugin_input_file *file) | |
937 | { | |
938 | gold_assert(parameters->options().has_plugins()); | |
939 | unsigned int obj_index = | |
940 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
941 | return parameters->options().plugins()->get_input_file(obj_index, file); | |
942 | } | |
943 | ||
944 | // Release the input file. | |
945 | ||
946 | static enum ld_plugin_status | |
947 | release_input_file(const void *handle) | |
948 | { | |
949 | gold_assert(parameters->options().has_plugins()); | |
950 | unsigned int obj_index = | |
951 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
952 | return parameters->options().plugins()->release_input_file(obj_index); | |
953 | } | |
954 | ||
89fc3421 CC |
955 | // Get the symbol resolution info for a plugin-claimed input file. |
956 | ||
957 | static enum ld_plugin_status | |
958 | get_symbols(const void * handle, int nsyms, ld_plugin_symbol* syms) | |
959 | { | |
960 | gold_assert(parameters->options().has_plugins()); | |
961 | Pluginobj* obj = parameters->options().plugins()->object( | |
962 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
963 | if (obj == NULL) | |
964 | return LDPS_ERR; | |
965 | return obj->get_symbol_resolution_info(nsyms, syms); | |
966 | } | |
967 | ||
968 | // Add a new (real) input file generated by a plugin. | |
969 | ||
970 | static enum ld_plugin_status | |
971 | add_input_file(char *pathname) | |
972 | { | |
973 | gold_assert(parameters->options().has_plugins()); | |
974 | return parameters->options().plugins()->add_input_file(pathname); | |
975 | } | |
976 | ||
977 | // Issue a diagnostic message from a plugin. | |
978 | ||
979 | static enum ld_plugin_status | |
6c52134c | 980 | message(int level, const char * format, ...) |
89fc3421 CC |
981 | { |
982 | va_list args; | |
983 | va_start(args, format); | |
984 | ||
985 | switch (level) | |
986 | { | |
987 | case LDPL_INFO: | |
988 | parameters->errors()->info(format, args); | |
989 | break; | |
990 | case LDPL_WARNING: | |
991 | parameters->errors()->warning(format, args); | |
992 | break; | |
993 | case LDPL_ERROR: | |
994 | default: | |
995 | parameters->errors()->error(format, args); | |
996 | break; | |
997 | case LDPL_FATAL: | |
998 | parameters->errors()->fatal(format, args); | |
999 | break; | |
1000 | } | |
1001 | ||
1002 | va_end(args); | |
1003 | return LDPS_OK; | |
1004 | } | |
1005 | ||
1006 | #endif // ENABLE_PLUGINS | |
1007 | ||
1008 | // Allocate a Pluginobj object of the appropriate size and endianness. | |
1009 | ||
1010 | static Pluginobj* | |
0f7c0701 | 1011 | make_sized_plugin_object(Input_file* input_file, off_t offset, off_t filesize) |
89fc3421 CC |
1012 | { |
1013 | Target* target; | |
1014 | Pluginobj* obj = NULL; | |
1015 | ||
1016 | if (parameters->target_valid()) | |
1017 | target = const_cast<Target*>(¶meters->target()); | |
1018 | else | |
1019 | target = const_cast<Target*>(¶meters->default_target()); | |
1020 | ||
1021 | if (target->get_size() == 32) | |
1022 | { | |
89fc3421 | 1023 | if (target->is_big_endian()) |
92f03fcb | 1024 | #ifdef HAVE_TARGET_32_BIG |
89fc3421 | 1025 | obj = new Sized_pluginobj<32, true>(input_file->filename(), |
0f7c0701 | 1026 | input_file, offset, filesize); |
92f03fcb CC |
1027 | #else |
1028 | gold_error(_("%s: not configured to support " | |
1029 | "32-bit big-endian object"), | |
1030 | input_file->filename().c_str()); | |
89fc3421 | 1031 | #endif |
89fc3421 | 1032 | else |
92f03fcb | 1033 | #ifdef HAVE_TARGET_32_LITTLE |
89fc3421 | 1034 | obj = new Sized_pluginobj<32, false>(input_file->filename(), |
0f7c0701 | 1035 | input_file, offset, filesize); |
92f03fcb CC |
1036 | #else |
1037 | gold_error(_("%s: not configured to support " | |
1038 | "32-bit little-endian object"), | |
1039 | input_file->filename().c_str()); | |
89fc3421 CC |
1040 | #endif |
1041 | } | |
1042 | else if (target->get_size() == 64) | |
1043 | { | |
89fc3421 | 1044 | if (target->is_big_endian()) |
92f03fcb | 1045 | #ifdef HAVE_TARGET_64_BIG |
89fc3421 | 1046 | obj = new Sized_pluginobj<64, true>(input_file->filename(), |
0f7c0701 | 1047 | input_file, offset, filesize); |
92f03fcb CC |
1048 | #else |
1049 | gold_error(_("%s: not configured to support " | |
1050 | "64-bit big-endian object"), | |
1051 | input_file->filename().c_str()); | |
89fc3421 | 1052 | #endif |
89fc3421 | 1053 | else |
92f03fcb | 1054 | #ifdef HAVE_TARGET_64_LITTLE |
89fc3421 | 1055 | obj = new Sized_pluginobj<64, false>(input_file->filename(), |
0f7c0701 | 1056 | input_file, offset, filesize); |
92f03fcb CC |
1057 | #else |
1058 | gold_error(_("%s: not configured to support " | |
1059 | "64-bit little-endian object"), | |
1060 | input_file->filename().c_str()); | |
89fc3421 CC |
1061 | #endif |
1062 | } | |
1063 | ||
1064 | gold_assert(obj != NULL); | |
1065 | obj->set_target(target); | |
1066 | return obj; | |
1067 | } | |
1068 | ||
1069 | } // End namespace gold. |