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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(); | |
f1ed28fb | 410 | this->workqueue_->queue_soon(new Read_symbols(this->input_objects_, |
89fc3421 CC |
411 | this->symtab_, |
412 | this->layout_, | |
413 | this->dirpath_, | |
414 | this->mapfile_, | |
415 | input_argument, | |
416 | NULL, | |
417 | this->this_blocker_, | |
418 | next_blocker)); | |
419 | this->this_blocker_ = next_blocker; | |
420 | return LDPS_OK; | |
421 | } | |
422 | ||
423 | // Class Pluginobj. | |
424 | ||
425 | Pluginobj::Pluginobj(const std::string& name, Input_file* input_file, | |
0f7c0701 | 426 | off_t offset, off_t filesize) |
89fc3421 | 427 | : Object(name, input_file, false, offset), |
0f7c0701 | 428 | nsyms_(0), syms_(NULL), symbols_(), filesize_(filesize), comdat_map_() |
89fc3421 CC |
429 | { |
430 | } | |
431 | ||
d66a9eb3 CC |
432 | // Return TRUE if a defined symbol might be reachable from outside the |
433 | // universe of claimed objects. | |
434 | ||
435 | static inline bool | |
436 | is_visible_from_outside(Symbol* lsym) | |
437 | { | |
438 | if (lsym->in_real_elf()) | |
439 | return true; | |
440 | if (parameters->options().relocatable()) | |
441 | return true; | |
442 | if (parameters->options().export_dynamic() || parameters->options().shared()) | |
443 | return lsym->is_externally_visible(); | |
444 | return false; | |
445 | } | |
446 | ||
89fc3421 CC |
447 | // Get symbol resolution info. |
448 | ||
449 | ld_plugin_status | |
450 | Pluginobj::get_symbol_resolution_info(int nsyms, ld_plugin_symbol* syms) const | |
451 | { | |
abc8dcba | 452 | if (nsyms > this->nsyms_) |
89fc3421 CC |
453 | return LDPS_NO_SYMS; |
454 | for (int i = 0; i < nsyms; i++) | |
455 | { | |
456 | ld_plugin_symbol* isym = &syms[i]; | |
457 | Symbol* lsym = this->symbols_[i]; | |
458 | ld_plugin_symbol_resolution res = LDPR_UNKNOWN; | |
459 | ||
460 | if (lsym->is_undefined()) | |
461 | // The symbol remains undefined. | |
462 | res = LDPR_UNDEF; | |
463 | else if (isym->def == LDPK_UNDEF | |
464 | || isym->def == LDPK_WEAKUNDEF | |
465 | || isym->def == LDPK_COMMON) | |
466 | { | |
467 | // The original symbol was undefined or common. | |
468 | if (lsym->source() != Symbol::FROM_OBJECT) | |
469 | res = LDPR_RESOLVED_EXEC; | |
470 | else if (lsym->object()->pluginobj() != NULL) | |
471 | res = LDPR_RESOLVED_IR; | |
472 | else if (lsym->object()->is_dynamic()) | |
473 | res = LDPR_RESOLVED_DYN; | |
474 | else | |
475 | res = LDPR_RESOLVED_EXEC; | |
476 | } | |
477 | else | |
478 | { | |
479 | // The original symbol was a definition. | |
480 | if (lsym->source() != Symbol::FROM_OBJECT) | |
481 | res = LDPR_PREEMPTED_REG; | |
482 | else if (lsym->object() == static_cast<const Object*>(this)) | |
d66a9eb3 | 483 | res = (is_visible_from_outside(lsym) |
89fc3421 CC |
484 | ? LDPR_PREVAILING_DEF |
485 | : LDPR_PREVAILING_DEF_IRONLY); | |
486 | else | |
487 | res = (lsym->object()->pluginobj() != NULL | |
488 | ? LDPR_PREEMPTED_IR | |
489 | : LDPR_PREEMPTED_REG); | |
490 | } | |
491 | isym->resolution = res; | |
492 | } | |
493 | return LDPS_OK; | |
494 | } | |
495 | ||
496 | // Return TRUE if the comdat group with key COMDAT_KEY from this object | |
497 | // should be kept. | |
498 | ||
499 | bool | |
500 | Pluginobj::include_comdat_group(std::string comdat_key, Layout* layout) | |
501 | { | |
502 | std::pair<Comdat_map::iterator, bool> ins = | |
503 | this->comdat_map_.insert(std::make_pair(comdat_key, false)); | |
504 | ||
505 | // If this is the first time we've seen this comdat key, ask the | |
506 | // layout object whether it should be included. | |
507 | if (ins.second) | |
8a4c0b0d ILT |
508 | { |
509 | Kept_section to_add(NULL, 1, true); | |
510 | ins.first->second = layout->find_or_add_kept_section(comdat_key, | |
511 | &to_add, | |
512 | NULL); | |
513 | } | |
89fc3421 CC |
514 | |
515 | return ins.first->second; | |
516 | } | |
517 | ||
518 | // Class Sized_pluginobj. | |
519 | ||
520 | template<int size, bool big_endian> | |
521 | Sized_pluginobj<size, big_endian>::Sized_pluginobj( | |
522 | const std::string& name, | |
523 | Input_file* input_file, | |
0f7c0701 CC |
524 | off_t offset, |
525 | off_t filesize) | |
526 | : Pluginobj(name, input_file, offset, filesize) | |
89fc3421 CC |
527 | { |
528 | } | |
529 | ||
530 | // Read the symbols. Not used for plugin objects. | |
531 | ||
532 | template<int size, bool big_endian> | |
533 | void | |
534 | Sized_pluginobj<size, big_endian>::do_read_symbols(Read_symbols_data*) | |
535 | { | |
536 | gold_unreachable(); | |
537 | } | |
538 | ||
539 | // Lay out the input sections. Not used for plugin objects. | |
540 | ||
541 | template<int size, bool big_endian> | |
542 | void | |
543 | Sized_pluginobj<size, big_endian>::do_layout(Symbol_table*, Layout*, | |
544 | Read_symbols_data*) | |
545 | { | |
546 | gold_unreachable(); | |
547 | } | |
548 | ||
549 | // Add the symbols to the symbol table. | |
550 | ||
89fc3421 CC |
551 | template<int size, bool big_endian> |
552 | void | |
553 | Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table* symtab, | |
f488e4b0 | 554 | Read_symbols_data*, |
89fc3421 CC |
555 | Layout* layout) |
556 | { | |
557 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
558 | unsigned char symbuf[sym_size]; | |
559 | elfcpp::Sym<size, big_endian> sym(symbuf); | |
560 | elfcpp::Sym_write<size, big_endian> osym(symbuf); | |
561 | ||
562 | typedef typename elfcpp::Elf_types<size>::Elf_WXword Elf_size_type; | |
563 | ||
564 | this->symbols_.resize(this->nsyms_); | |
565 | ||
566 | for (int i = 0; i < this->nsyms_; ++i) | |
567 | { | |
568 | const struct ld_plugin_symbol *isym = &this->syms_[i]; | |
569 | const char* name = isym->name; | |
570 | const char* ver = isym->version; | |
571 | elfcpp::Elf_Half shndx; | |
572 | elfcpp::STB bind; | |
573 | elfcpp::STV vis; | |
574 | ||
575 | if (name != NULL && name[0] == '\0') | |
576 | name = NULL; | |
577 | if (ver != NULL && ver[0] == '\0') | |
578 | ver = NULL; | |
579 | ||
580 | switch (isym->def) | |
581 | { | |
582 | case LDPK_WEAKDEF: | |
583 | case LDPK_WEAKUNDEF: | |
584 | bind = elfcpp::STB_WEAK; | |
585 | break; | |
586 | case LDPK_DEF: | |
587 | case LDPK_UNDEF: | |
588 | case LDPK_COMMON: | |
589 | default: | |
590 | bind = elfcpp::STB_GLOBAL; | |
591 | break; | |
592 | } | |
593 | ||
594 | switch (isym->def) | |
595 | { | |
596 | case LDPK_DEF: | |
597 | case LDPK_WEAKDEF: | |
598 | shndx = elfcpp::SHN_ABS; | |
599 | break; | |
600 | case LDPK_COMMON: | |
601 | shndx = elfcpp::SHN_COMMON; | |
602 | break; | |
603 | case LDPK_UNDEF: | |
604 | case LDPK_WEAKUNDEF: | |
605 | default: | |
606 | shndx = elfcpp::SHN_UNDEF; | |
607 | break; | |
608 | } | |
609 | ||
610 | switch (isym->visibility) | |
611 | { | |
612 | case LDPV_PROTECTED: | |
613 | vis = elfcpp::STV_DEFAULT; | |
614 | break; | |
615 | case LDPV_INTERNAL: | |
616 | vis = elfcpp::STV_DEFAULT; | |
617 | break; | |
618 | case LDPV_HIDDEN: | |
619 | vis = elfcpp::STV_DEFAULT; | |
620 | break; | |
621 | case LDPV_DEFAULT: | |
622 | default: | |
623 | vis = elfcpp::STV_DEFAULT; | |
624 | break; | |
625 | } | |
626 | ||
627 | if (isym->comdat_key != NULL | |
628 | && isym->comdat_key[0] != '\0' | |
629 | && !this->include_comdat_group(isym->comdat_key, layout)) | |
630 | shndx = elfcpp::SHN_UNDEF; | |
631 | ||
632 | osym.put_st_name(0); | |
633 | osym.put_st_value(0); | |
634 | osym.put_st_size(static_cast<Elf_size_type>(isym->size)); | |
635 | osym.put_st_info(bind, elfcpp::STT_NOTYPE); | |
636 | osym.put_st_other(vis, 0); | |
637 | osym.put_st_shndx(shndx); | |
638 | ||
639 | this->symbols_[i] = | |
640 | symtab->add_from_pluginobj<size, big_endian>(this, name, ver, &sym); | |
641 | } | |
642 | } | |
643 | ||
644 | // Get the size of a section. Not used for plugin objects. | |
645 | ||
646 | template<int size, bool big_endian> | |
647 | uint64_t | |
648 | Sized_pluginobj<size, big_endian>::do_section_size(unsigned int) | |
649 | { | |
650 | gold_unreachable(); | |
651 | return 0; | |
652 | } | |
653 | ||
654 | // Get the name of a section. Not used for plugin objects. | |
655 | ||
656 | template<int size, bool big_endian> | |
657 | std::string | |
658 | Sized_pluginobj<size, big_endian>::do_section_name(unsigned int) | |
659 | { | |
660 | gold_unreachable(); | |
661 | return std::string(); | |
662 | } | |
663 | ||
664 | // Return a view of the contents of a section. Not used for plugin objects. | |
665 | ||
666 | template<int size, bool big_endian> | |
667 | Object::Location | |
668 | Sized_pluginobj<size, big_endian>::do_section_contents(unsigned int) | |
669 | { | |
670 | Location loc(0, 0); | |
671 | ||
672 | gold_unreachable(); | |
673 | return loc; | |
674 | } | |
675 | ||
676 | // Return section flags. Not used for plugin objects. | |
677 | ||
678 | template<int size, bool big_endian> | |
679 | uint64_t | |
680 | Sized_pluginobj<size, big_endian>::do_section_flags(unsigned int) | |
681 | { | |
682 | gold_unreachable(); | |
683 | return 0; | |
684 | } | |
685 | ||
686 | // Return section address. Not used for plugin objects. | |
687 | ||
688 | template<int size, bool big_endian> | |
689 | uint64_t | |
690 | Sized_pluginobj<size, big_endian>::do_section_address(unsigned int) | |
691 | { | |
692 | gold_unreachable(); | |
693 | return 0; | |
694 | } | |
695 | ||
696 | // Return section type. Not used for plugin objects. | |
697 | ||
698 | template<int size, bool big_endian> | |
699 | unsigned int | |
700 | Sized_pluginobj<size, big_endian>::do_section_type(unsigned int) | |
701 | { | |
702 | gold_unreachable(); | |
703 | return 0; | |
704 | } | |
705 | ||
706 | // Return the section link field. Not used for plugin objects. | |
707 | ||
708 | template<int size, bool big_endian> | |
709 | unsigned int | |
710 | Sized_pluginobj<size, big_endian>::do_section_link(unsigned int) | |
711 | { | |
712 | gold_unreachable(); | |
713 | return 0; | |
714 | } | |
715 | ||
716 | // Return the section link field. Not used for plugin objects. | |
717 | ||
718 | template<int size, bool big_endian> | |
719 | unsigned int | |
720 | Sized_pluginobj<size, big_endian>::do_section_info(unsigned int) | |
721 | { | |
722 | gold_unreachable(); | |
723 | return 0; | |
724 | } | |
725 | ||
726 | // Return the section alignment. Not used for plugin objects. | |
727 | ||
728 | template<int size, bool big_endian> | |
729 | uint64_t | |
730 | Sized_pluginobj<size, big_endian>::do_section_addralign(unsigned int) | |
731 | { | |
732 | gold_unreachable(); | |
733 | return 0; | |
734 | } | |
735 | ||
736 | // Return the Xindex structure to use. Not used for plugin objects. | |
737 | ||
738 | template<int size, bool big_endian> | |
739 | Xindex* | |
740 | Sized_pluginobj<size, big_endian>::do_initialize_xindex() | |
741 | { | |
742 | gold_unreachable(); | |
743 | return NULL; | |
744 | } | |
745 | ||
746 | // Get symbol counts. Not used for plugin objects. | |
747 | ||
748 | template<int size, bool big_endian> | |
749 | void | |
750 | Sized_pluginobj<size, big_endian>::do_get_global_symbol_counts(const Symbol_table*, | |
751 | size_t*, size_t*) const | |
752 | { | |
753 | gold_unreachable(); | |
754 | } | |
755 | ||
5995b570 | 756 | // Class Plugin_finish. This task runs after all replacement files have |
6d03d481 | 757 | // been added. It calls each plugin's cleanup handler. |
89fc3421 | 758 | |
5995b570 | 759 | class Plugin_finish : public Task |
89fc3421 CC |
760 | { |
761 | public: | |
5995b570 | 762 | Plugin_finish(Task_token* this_blocker, Task_token* next_blocker) |
89fc3421 CC |
763 | : this_blocker_(this_blocker), next_blocker_(next_blocker) |
764 | { } | |
765 | ||
5995b570 | 766 | ~Plugin_finish() |
89fc3421 CC |
767 | { |
768 | if (this->this_blocker_ != NULL) | |
769 | delete this->this_blocker_; | |
770 | } | |
771 | ||
772 | Task_token* | |
773 | is_runnable() | |
774 | { | |
775 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
776 | return this->this_blocker_; | |
777 | return NULL; | |
778 | } | |
779 | ||
780 | void | |
781 | locks(Task_locker* tl) | |
782 | { tl->add(this, this->next_blocker_); } | |
783 | ||
784 | void | |
785 | run(Workqueue*) | |
483620e8 CC |
786 | { |
787 | Plugin_manager* plugins = parameters->options().plugins(); | |
788 | gold_assert(plugins != NULL); | |
483620e8 CC |
789 | plugins->cleanup(); |
790 | } | |
89fc3421 CC |
791 | |
792 | std::string | |
793 | get_name() const | |
5995b570 | 794 | { return "Plugin_finish"; } |
89fc3421 CC |
795 | |
796 | private: | |
797 | Task_token* this_blocker_; | |
798 | Task_token* next_blocker_; | |
799 | }; | |
800 | ||
801 | // Class Plugin_hook. | |
802 | ||
803 | Plugin_hook::~Plugin_hook() | |
804 | { | |
805 | } | |
806 | ||
807 | // Return whether a Plugin_hook task is runnable. | |
808 | ||
809 | Task_token* | |
810 | Plugin_hook::is_runnable() | |
811 | { | |
812 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
813 | return this->this_blocker_; | |
814 | return NULL; | |
815 | } | |
816 | ||
817 | // Return a Task_locker for a Plugin_hook task. We don't need any | |
818 | // locks here. | |
819 | ||
820 | void | |
821 | Plugin_hook::locks(Task_locker*) | |
822 | { | |
823 | } | |
824 | ||
89fc3421 CC |
825 | // Run the "all symbols read" plugin hook. |
826 | ||
827 | void | |
5995b570 | 828 | Plugin_hook::run(Workqueue* workqueue) |
89fc3421 CC |
829 | { |
830 | gold_assert(this->options_.has_plugins()); | |
831 | this->options_.plugins()->all_symbols_read(workqueue, | |
0f7c0701 | 832 | this, |
89fc3421 CC |
833 | this->input_objects_, |
834 | this->symtab_, | |
835 | this->layout_, | |
836 | this->dirpath_, | |
837 | this->mapfile_, | |
838 | &this->this_blocker_); | |
5995b570 CC |
839 | workqueue->queue_soon(new Plugin_finish(this->this_blocker_, |
840 | this->next_blocker_)); | |
89fc3421 CC |
841 | } |
842 | ||
843 | // The C interface routines called by the plugins. | |
844 | ||
845 | #ifdef ENABLE_PLUGINS | |
846 | ||
847 | // Register a claim-file handler. | |
848 | ||
849 | static enum ld_plugin_status | |
850 | register_claim_file(ld_plugin_claim_file_handler handler) | |
851 | { | |
852 | gold_assert(parameters->options().has_plugins()); | |
853 | parameters->options().plugins()->set_claim_file_handler(handler); | |
854 | return LDPS_OK; | |
855 | } | |
856 | ||
857 | // Register an all-symbols-read handler. | |
858 | ||
859 | static enum ld_plugin_status | |
860 | register_all_symbols_read(ld_plugin_all_symbols_read_handler handler) | |
861 | { | |
862 | gold_assert(parameters->options().has_plugins()); | |
863 | parameters->options().plugins()->set_all_symbols_read_handler(handler); | |
864 | return LDPS_OK; | |
865 | } | |
866 | ||
867 | // Register a cleanup handler. | |
868 | ||
869 | static enum ld_plugin_status | |
870 | register_cleanup(ld_plugin_cleanup_handler handler) | |
871 | { | |
872 | gold_assert(parameters->options().has_plugins()); | |
873 | parameters->options().plugins()->set_cleanup_handler(handler); | |
874 | return LDPS_OK; | |
875 | } | |
876 | ||
877 | // Add symbols from a plugin-claimed input file. | |
878 | ||
879 | static enum ld_plugin_status | |
880 | add_symbols(void* handle, int nsyms, const ld_plugin_symbol *syms) | |
881 | { | |
882 | gold_assert(parameters->options().has_plugins()); | |
883 | Pluginobj* obj = parameters->options().plugins()->make_plugin_object( | |
884 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
885 | if (obj == NULL) | |
886 | return LDPS_ERR; | |
887 | obj->store_incoming_symbols(nsyms, syms); | |
888 | return LDPS_OK; | |
889 | } | |
890 | ||
0f7c0701 CC |
891 | // Get the input file information with an open (possibly re-opened) |
892 | // file descriptor. | |
893 | ||
894 | static enum ld_plugin_status | |
895 | get_input_file(const void *handle, struct ld_plugin_input_file *file) | |
896 | { | |
897 | gold_assert(parameters->options().has_plugins()); | |
898 | unsigned int obj_index = | |
899 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
900 | return parameters->options().plugins()->get_input_file(obj_index, file); | |
901 | } | |
902 | ||
903 | // Release the input file. | |
904 | ||
905 | static enum ld_plugin_status | |
906 | release_input_file(const void *handle) | |
907 | { | |
908 | gold_assert(parameters->options().has_plugins()); | |
909 | unsigned int obj_index = | |
910 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
911 | return parameters->options().plugins()->release_input_file(obj_index); | |
912 | } | |
913 | ||
89fc3421 CC |
914 | // Get the symbol resolution info for a plugin-claimed input file. |
915 | ||
916 | static enum ld_plugin_status | |
917 | get_symbols(const void * handle, int nsyms, ld_plugin_symbol* syms) | |
918 | { | |
919 | gold_assert(parameters->options().has_plugins()); | |
920 | Pluginobj* obj = parameters->options().plugins()->object( | |
921 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
922 | if (obj == NULL) | |
923 | return LDPS_ERR; | |
924 | return obj->get_symbol_resolution_info(nsyms, syms); | |
925 | } | |
926 | ||
927 | // Add a new (real) input file generated by a plugin. | |
928 | ||
929 | static enum ld_plugin_status | |
930 | add_input_file(char *pathname) | |
931 | { | |
932 | gold_assert(parameters->options().has_plugins()); | |
933 | return parameters->options().plugins()->add_input_file(pathname); | |
934 | } | |
935 | ||
936 | // Issue a diagnostic message from a plugin. | |
937 | ||
938 | static enum ld_plugin_status | |
6c52134c | 939 | message(int level, const char * format, ...) |
89fc3421 CC |
940 | { |
941 | va_list args; | |
942 | va_start(args, format); | |
943 | ||
944 | switch (level) | |
945 | { | |
946 | case LDPL_INFO: | |
947 | parameters->errors()->info(format, args); | |
948 | break; | |
949 | case LDPL_WARNING: | |
950 | parameters->errors()->warning(format, args); | |
951 | break; | |
952 | case LDPL_ERROR: | |
953 | default: | |
954 | parameters->errors()->error(format, args); | |
955 | break; | |
956 | case LDPL_FATAL: | |
957 | parameters->errors()->fatal(format, args); | |
958 | break; | |
959 | } | |
960 | ||
961 | va_end(args); | |
962 | return LDPS_OK; | |
963 | } | |
964 | ||
965 | #endif // ENABLE_PLUGINS | |
966 | ||
967 | // Allocate a Pluginobj object of the appropriate size and endianness. | |
968 | ||
969 | static Pluginobj* | |
0f7c0701 | 970 | make_sized_plugin_object(Input_file* input_file, off_t offset, off_t filesize) |
89fc3421 CC |
971 | { |
972 | Target* target; | |
973 | Pluginobj* obj = NULL; | |
974 | ||
975 | if (parameters->target_valid()) | |
976 | target = const_cast<Target*>(¶meters->target()); | |
977 | else | |
978 | target = const_cast<Target*>(¶meters->default_target()); | |
979 | ||
980 | if (target->get_size() == 32) | |
981 | { | |
89fc3421 | 982 | if (target->is_big_endian()) |
92f03fcb | 983 | #ifdef HAVE_TARGET_32_BIG |
89fc3421 | 984 | obj = new Sized_pluginobj<32, true>(input_file->filename(), |
0f7c0701 | 985 | input_file, offset, filesize); |
92f03fcb CC |
986 | #else |
987 | gold_error(_("%s: not configured to support " | |
988 | "32-bit big-endian object"), | |
989 | input_file->filename().c_str()); | |
89fc3421 | 990 | #endif |
89fc3421 | 991 | else |
92f03fcb | 992 | #ifdef HAVE_TARGET_32_LITTLE |
89fc3421 | 993 | obj = new Sized_pluginobj<32, false>(input_file->filename(), |
0f7c0701 | 994 | input_file, offset, filesize); |
92f03fcb CC |
995 | #else |
996 | gold_error(_("%s: not configured to support " | |
997 | "32-bit little-endian object"), | |
998 | input_file->filename().c_str()); | |
89fc3421 CC |
999 | #endif |
1000 | } | |
1001 | else if (target->get_size() == 64) | |
1002 | { | |
89fc3421 | 1003 | if (target->is_big_endian()) |
92f03fcb | 1004 | #ifdef HAVE_TARGET_64_BIG |
89fc3421 | 1005 | obj = new Sized_pluginobj<64, true>(input_file->filename(), |
0f7c0701 | 1006 | input_file, offset, filesize); |
92f03fcb CC |
1007 | #else |
1008 | gold_error(_("%s: not configured to support " | |
1009 | "64-bit big-endian object"), | |
1010 | input_file->filename().c_str()); | |
89fc3421 | 1011 | #endif |
89fc3421 | 1012 | else |
92f03fcb | 1013 | #ifdef HAVE_TARGET_64_LITTLE |
89fc3421 | 1014 | obj = new Sized_pluginobj<64, false>(input_file->filename(), |
0f7c0701 | 1015 | input_file, offset, filesize); |
92f03fcb CC |
1016 | #else |
1017 | gold_error(_("%s: not configured to support " | |
1018 | "64-bit little-endian object"), | |
1019 | input_file->filename().c_str()); | |
89fc3421 CC |
1020 | #endif |
1021 | } | |
1022 | ||
1023 | gold_assert(obj != NULL); | |
1024 | obj->set_target(target); | |
1025 | return obj; | |
1026 | } | |
1027 | ||
1028 | } // End namespace gold. |