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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 | ||
e99daf92 ILT |
76 | static enum ld_plugin_status |
77 | add_input_library(char *pathname); | |
78 | ||
89fc3421 | 79 | static enum ld_plugin_status |
6c52134c | 80 | message(int level, const char *format, ...); |
89fc3421 CC |
81 | |
82 | }; | |
83 | ||
84 | #endif // ENABLE_PLUGINS | |
85 | ||
86 | static Pluginobj* make_sized_plugin_object(Input_file* input_file, | |
0f7c0701 | 87 | off_t offset, off_t filesize); |
89fc3421 CC |
88 | |
89 | // Plugin methods. | |
90 | ||
91 | // Load one plugin library. | |
92 | ||
93 | void | |
94 | Plugin::load() | |
95 | { | |
96 | #ifdef ENABLE_PLUGINS | |
89fc3421 CC |
97 | // Load the plugin library. |
98 | // FIXME: Look for the library in standard locations. | |
4674ecfc | 99 | this->handle_ = dlopen(this->filename_.c_str(), RTLD_NOW); |
89fc3421 CC |
100 | if (this->handle_ == NULL) |
101 | { | |
4674ecfc CC |
102 | gold_error(_("%s: could not load plugin library"), |
103 | this->filename_.c_str()); | |
89fc3421 CC |
104 | return; |
105 | } | |
106 | ||
107 | // Find the plugin's onload entry point. | |
108 | ld_plugin_onload onload = reinterpret_cast<ld_plugin_onload> | |
109 | (dlsym(this->handle_, "onload")); | |
110 | if (onload == NULL) | |
111 | { | |
4674ecfc CC |
112 | gold_error(_("%s: could not find onload entry point"), |
113 | this->filename_.c_str()); | |
89fc3421 CC |
114 | return; |
115 | } | |
116 | ||
117 | // Get the linker's version number. | |
118 | const char* ver = get_version_string(); | |
119 | int major = 0; | |
120 | int minor = 0; | |
121 | sscanf(ver, "%d.%d", &major, &minor); | |
122 | ||
123 | // Allocate and populate a transfer vector. | |
e99daf92 | 124 | const int tv_fixed_size = 14; |
4674ecfc | 125 | int tv_size = this->args_.size() + tv_fixed_size; |
89fc3421 CC |
126 | ld_plugin_tv *tv = new ld_plugin_tv[tv_size]; |
127 | ||
abc8dcba CC |
128 | // Put LDPT_MESSAGE at the front of the list so the plugin can use it |
129 | // while processing subsequent entries. | |
89fc3421 | 130 | int i = 0; |
abc8dcba CC |
131 | tv[i].tv_tag = LDPT_MESSAGE; |
132 | tv[i].tv_u.tv_message = message; | |
133 | ||
134 | ++i; | |
89fc3421 CC |
135 | tv[i].tv_tag = LDPT_API_VERSION; |
136 | tv[i].tv_u.tv_val = LD_PLUGIN_API_VERSION; | |
137 | ||
138 | ++i; | |
139 | tv[i].tv_tag = LDPT_GOLD_VERSION; | |
140 | tv[i].tv_u.tv_val = major * 100 + minor; | |
141 | ||
142 | ++i; | |
143 | tv[i].tv_tag = LDPT_LINKER_OUTPUT; | |
144 | if (parameters->options().relocatable()) | |
145 | tv[i].tv_u.tv_val = LDPO_REL; | |
146 | else if (parameters->options().shared()) | |
147 | tv[i].tv_u.tv_val = LDPO_DYN; | |
148 | else | |
149 | tv[i].tv_u.tv_val = LDPO_EXEC; | |
150 | ||
4674ecfc | 151 | for (unsigned int j = 0; j < this->args_.size(); ++j) |
89fc3421 CC |
152 | { |
153 | ++i; | |
154 | tv[i].tv_tag = LDPT_OPTION; | |
4674ecfc | 155 | tv[i].tv_u.tv_string = this->args_[j].c_str(); |
89fc3421 CC |
156 | } |
157 | ||
158 | ++i; | |
159 | tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK; | |
160 | tv[i].tv_u.tv_register_claim_file = register_claim_file; | |
161 | ||
162 | ++i; | |
163 | tv[i].tv_tag = LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK; | |
164 | tv[i].tv_u.tv_register_all_symbols_read = register_all_symbols_read; | |
165 | ||
166 | ++i; | |
167 | tv[i].tv_tag = LDPT_REGISTER_CLEANUP_HOOK; | |
168 | tv[i].tv_u.tv_register_cleanup = register_cleanup; | |
169 | ||
170 | ++i; | |
171 | tv[i].tv_tag = LDPT_ADD_SYMBOLS; | |
172 | tv[i].tv_u.tv_add_symbols = add_symbols; | |
173 | ||
0f7c0701 CC |
174 | ++i; |
175 | tv[i].tv_tag = LDPT_GET_INPUT_FILE; | |
176 | tv[i].tv_u.tv_get_input_file = get_input_file; | |
177 | ||
178 | ++i; | |
179 | tv[i].tv_tag = LDPT_RELEASE_INPUT_FILE; | |
180 | tv[i].tv_u.tv_release_input_file = release_input_file; | |
181 | ||
89fc3421 CC |
182 | ++i; |
183 | tv[i].tv_tag = LDPT_GET_SYMBOLS; | |
184 | tv[i].tv_u.tv_get_symbols = get_symbols; | |
185 | ||
186 | ++i; | |
187 | tv[i].tv_tag = LDPT_ADD_INPUT_FILE; | |
188 | tv[i].tv_u.tv_add_input_file = add_input_file; | |
189 | ||
e99daf92 ILT |
190 | ++i; |
191 | tv[i].tv_tag = LDPT_ADD_INPUT_LIBRARY; | |
192 | tv[i].tv_u.tv_add_input_library = add_input_library; | |
193 | ||
89fc3421 CC |
194 | ++i; |
195 | tv[i].tv_tag = LDPT_NULL; | |
196 | tv[i].tv_u.tv_val = 0; | |
197 | ||
198 | gold_assert(i == tv_size - 1); | |
199 | ||
200 | // Call the onload entry point. | |
201 | (*onload)(tv); | |
202 | ||
6c52134c | 203 | delete[] tv; |
89fc3421 CC |
204 | #endif // ENABLE_PLUGINS |
205 | } | |
206 | ||
207 | // Call the plugin claim-file handler. | |
208 | ||
209 | inline bool | |
210 | Plugin::claim_file(struct ld_plugin_input_file *plugin_input_file) | |
211 | { | |
212 | int claimed = 0; | |
213 | ||
214 | if (this->claim_file_handler_ != NULL) | |
215 | { | |
216 | (*this->claim_file_handler_)(plugin_input_file, &claimed); | |
217 | if (claimed) | |
218 | return true; | |
219 | } | |
220 | return false; | |
221 | } | |
222 | ||
223 | // Call the all-symbols-read handler. | |
224 | ||
225 | inline void | |
226 | Plugin::all_symbols_read() | |
227 | { | |
228 | if (this->all_symbols_read_handler_ != NULL) | |
229 | (*this->all_symbols_read_handler_)(); | |
230 | } | |
231 | ||
232 | // Call the cleanup handler. | |
233 | ||
234 | inline void | |
235 | Plugin::cleanup() | |
236 | { | |
237 | if (this->cleanup_handler_ != NULL) | |
238 | (*this->cleanup_handler_)(); | |
239 | } | |
240 | ||
241 | // Plugin_manager methods. | |
242 | ||
243 | Plugin_manager::~Plugin_manager() | |
244 | { | |
245 | for (Plugin_list::iterator p = this->plugins_.begin(); | |
246 | p != this->plugins_.end(); | |
247 | ++p) | |
248 | delete *p; | |
249 | this->plugins_.clear(); | |
250 | for (Object_list::iterator obj = this->objects_.begin(); | |
251 | obj != this->objects_.end(); | |
252 | ++obj) | |
253 | delete *obj; | |
254 | this->objects_.clear(); | |
255 | } | |
256 | ||
257 | // Load all plugin libraries. | |
258 | ||
259 | void | |
260 | Plugin_manager::load_plugins() | |
261 | { | |
262 | for (this->current_ = this->plugins_.begin(); | |
263 | this->current_ != this->plugins_.end(); | |
264 | ++this->current_) | |
265 | (*this->current_)->load(); | |
266 | } | |
267 | ||
268 | // Call the plugin claim-file handlers in turn to see if any claim the file. | |
269 | ||
270 | Pluginobj* | |
271 | Plugin_manager::claim_file(Input_file* input_file, off_t offset, | |
272 | off_t filesize) | |
273 | { | |
274 | if (this->in_replacement_phase_) | |
275 | return NULL; | |
276 | ||
277 | unsigned int handle = this->objects_.size(); | |
278 | this->input_file_ = input_file; | |
279 | this->plugin_input_file_.name = input_file->filename().c_str(); | |
280 | this->plugin_input_file_.fd = input_file->file().descriptor(); | |
281 | this->plugin_input_file_.offset = offset; | |
282 | this->plugin_input_file_.filesize = filesize; | |
283 | this->plugin_input_file_.handle = reinterpret_cast<void*>(handle); | |
284 | ||
285 | for (this->current_ = this->plugins_.begin(); | |
286 | this->current_ != this->plugins_.end(); | |
287 | ++this->current_) | |
288 | { | |
289 | if ((*this->current_)->claim_file(&this->plugin_input_file_)) | |
290 | { | |
abc8dcba CC |
291 | if (this->objects_.size() > handle) |
292 | return this->objects_[handle]; | |
293 | ||
294 | // If the plugin claimed the file but did not call the | |
295 | // add_symbols callback, we need to create the Pluginobj now. | |
296 | Pluginobj* obj = this->make_plugin_object(handle); | |
297 | return obj; | |
89fc3421 CC |
298 | } |
299 | } | |
300 | ||
301 | return NULL; | |
302 | } | |
303 | ||
304 | // Call the all-symbols-read handlers. | |
305 | ||
306 | void | |
0f7c0701 | 307 | Plugin_manager::all_symbols_read(Workqueue* workqueue, Task* task, |
89fc3421 CC |
308 | Input_objects* input_objects, |
309 | Symbol_table* symtab, Layout* layout, | |
310 | Dirsearch* dirpath, Mapfile* mapfile, | |
311 | Task_token** last_blocker) | |
312 | { | |
313 | this->in_replacement_phase_ = true; | |
314 | this->workqueue_ = workqueue; | |
0f7c0701 | 315 | this->task_ = task; |
89fc3421 CC |
316 | this->input_objects_ = input_objects; |
317 | this->symtab_ = symtab; | |
318 | this->layout_ = layout; | |
319 | this->dirpath_ = dirpath; | |
320 | this->mapfile_ = mapfile; | |
321 | this->this_blocker_ = NULL; | |
322 | ||
323 | for (this->current_ = this->plugins_.begin(); | |
324 | this->current_ != this->plugins_.end(); | |
325 | ++this->current_) | |
326 | (*this->current_)->all_symbols_read(); | |
327 | ||
328 | *last_blocker = this->this_blocker_; | |
329 | } | |
330 | ||
483620e8 | 331 | // Layout deferred objects. |
89fc3421 CC |
332 | |
333 | void | |
483620e8 | 334 | Plugin_manager::layout_deferred_objects() |
89fc3421 | 335 | { |
5995b570 CC |
336 | Deferred_layout_list::iterator obj; |
337 | ||
338 | for (obj = this->deferred_layout_objects_.begin(); | |
339 | obj != this->deferred_layout_objects_.end(); | |
340 | ++obj) | |
341 | (*obj)->layout_deferred_sections(this->layout_); | |
483620e8 CC |
342 | } |
343 | ||
344 | // Call the cleanup handlers. | |
5995b570 | 345 | |
483620e8 CC |
346 | void |
347 | Plugin_manager::cleanup() | |
348 | { | |
349 | if (this->cleanup_done_) | |
350 | return; | |
89fc3421 CC |
351 | for (this->current_ = this->plugins_.begin(); |
352 | this->current_ != this->plugins_.end(); | |
353 | ++this->current_) | |
354 | (*this->current_)->cleanup(); | |
483620e8 | 355 | this->cleanup_done_ = true; |
89fc3421 CC |
356 | } |
357 | ||
358 | // Make a new Pluginobj object. This is called when the plugin calls | |
359 | // the add_symbols API. | |
360 | ||
361 | Pluginobj* | |
362 | Plugin_manager::make_plugin_object(unsigned int handle) | |
363 | { | |
364 | // Make sure we aren't asked to make an object for the same handle twice. | |
365 | if (this->objects_.size() != handle) | |
366 | return NULL; | |
367 | ||
368 | Pluginobj* obj = make_sized_plugin_object(this->input_file_, | |
0f7c0701 CC |
369 | this->plugin_input_file_.offset, |
370 | this->plugin_input_file_.filesize); | |
89fc3421 CC |
371 | this->objects_.push_back(obj); |
372 | return obj; | |
373 | } | |
374 | ||
0f7c0701 CC |
375 | // Get the input file information with an open (possibly re-opened) |
376 | // file descriptor. | |
377 | ||
378 | ld_plugin_status | |
379 | Plugin_manager::get_input_file(unsigned int handle, | |
380 | struct ld_plugin_input_file *file) | |
381 | { | |
382 | Pluginobj* obj = this->object(handle); | |
383 | if (obj == NULL) | |
384 | return LDPS_BAD_HANDLE; | |
385 | ||
386 | obj->lock(this->task_); | |
387 | file->name = obj->filename().c_str(); | |
388 | file->fd = obj->descriptor(); | |
389 | file->offset = obj->offset(); | |
390 | file->filesize = obj->filesize(); | |
391 | file->handle = reinterpret_cast<void*>(handle); | |
392 | return LDPS_OK; | |
393 | } | |
394 | ||
395 | // Release the input file. | |
396 | ||
397 | ld_plugin_status | |
398 | Plugin_manager::release_input_file(unsigned int handle) | |
399 | { | |
400 | Pluginobj* obj = this->object(handle); | |
401 | if (obj == NULL) | |
402 | return LDPS_BAD_HANDLE; | |
403 | ||
404 | obj->unlock(this->task_); | |
405 | return LDPS_OK; | |
406 | } | |
407 | ||
89fc3421 CC |
408 | // Add a new input file. |
409 | ||
410 | ld_plugin_status | |
e99daf92 | 411 | Plugin_manager::add_input_file(char *pathname, bool is_lib) |
89fc3421 | 412 | { |
e99daf92 | 413 | Input_file_argument file(pathname, is_lib, "", false, this->options_); |
89fc3421 CC |
414 | Input_argument* input_argument = new Input_argument(file); |
415 | Task_token* next_blocker = new Task_token(true); | |
416 | next_blocker->add_blocker(); | |
072fe7ce ILT |
417 | if (this->layout_->incremental_inputs()) |
418 | gold_error(_("Input files added by plug-ins in --incremental mode not " | |
419 | "supported yet.\n")); | |
f1ed28fb | 420 | this->workqueue_->queue_soon(new Read_symbols(this->input_objects_, |
89fc3421 CC |
421 | this->symtab_, |
422 | this->layout_, | |
423 | this->dirpath_, | |
15f8229b | 424 | 0, |
89fc3421 CC |
425 | this->mapfile_, |
426 | input_argument, | |
427 | NULL, | |
428 | this->this_blocker_, | |
429 | next_blocker)); | |
430 | this->this_blocker_ = next_blocker; | |
431 | return LDPS_OK; | |
432 | } | |
433 | ||
434 | // Class Pluginobj. | |
435 | ||
436 | Pluginobj::Pluginobj(const std::string& name, Input_file* input_file, | |
0f7c0701 | 437 | off_t offset, off_t filesize) |
89fc3421 | 438 | : Object(name, input_file, false, offset), |
0f7c0701 | 439 | nsyms_(0), syms_(NULL), symbols_(), filesize_(filesize), comdat_map_() |
89fc3421 CC |
440 | { |
441 | } | |
442 | ||
d66a9eb3 CC |
443 | // Return TRUE if a defined symbol might be reachable from outside the |
444 | // universe of claimed objects. | |
445 | ||
446 | static inline bool | |
447 | is_visible_from_outside(Symbol* lsym) | |
448 | { | |
449 | if (lsym->in_real_elf()) | |
450 | return true; | |
451 | if (parameters->options().relocatable()) | |
452 | return true; | |
453 | if (parameters->options().export_dynamic() || parameters->options().shared()) | |
454 | return lsym->is_externally_visible(); | |
455 | return false; | |
456 | } | |
457 | ||
89fc3421 CC |
458 | // Get symbol resolution info. |
459 | ||
460 | ld_plugin_status | |
461 | Pluginobj::get_symbol_resolution_info(int nsyms, ld_plugin_symbol* syms) const | |
462 | { | |
abc8dcba | 463 | if (nsyms > this->nsyms_) |
89fc3421 CC |
464 | return LDPS_NO_SYMS; |
465 | for (int i = 0; i < nsyms; i++) | |
466 | { | |
467 | ld_plugin_symbol* isym = &syms[i]; | |
468 | Symbol* lsym = this->symbols_[i]; | |
469 | ld_plugin_symbol_resolution res = LDPR_UNKNOWN; | |
470 | ||
471 | if (lsym->is_undefined()) | |
472 | // The symbol remains undefined. | |
473 | res = LDPR_UNDEF; | |
474 | else if (isym->def == LDPK_UNDEF | |
475 | || isym->def == LDPK_WEAKUNDEF | |
476 | || isym->def == LDPK_COMMON) | |
477 | { | |
478 | // The original symbol was undefined or common. | |
479 | if (lsym->source() != Symbol::FROM_OBJECT) | |
480 | res = LDPR_RESOLVED_EXEC; | |
481 | else if (lsym->object()->pluginobj() != NULL) | |
482 | res = LDPR_RESOLVED_IR; | |
483 | else if (lsym->object()->is_dynamic()) | |
484 | res = LDPR_RESOLVED_DYN; | |
485 | else | |
486 | res = LDPR_RESOLVED_EXEC; | |
487 | } | |
488 | else | |
489 | { | |
490 | // The original symbol was a definition. | |
491 | if (lsym->source() != Symbol::FROM_OBJECT) | |
492 | res = LDPR_PREEMPTED_REG; | |
493 | else if (lsym->object() == static_cast<const Object*>(this)) | |
d66a9eb3 | 494 | res = (is_visible_from_outside(lsym) |
89fc3421 CC |
495 | ? LDPR_PREVAILING_DEF |
496 | : LDPR_PREVAILING_DEF_IRONLY); | |
497 | else | |
498 | res = (lsym->object()->pluginobj() != NULL | |
499 | ? LDPR_PREEMPTED_IR | |
500 | : LDPR_PREEMPTED_REG); | |
501 | } | |
502 | isym->resolution = res; | |
503 | } | |
504 | return LDPS_OK; | |
505 | } | |
506 | ||
507 | // Return TRUE if the comdat group with key COMDAT_KEY from this object | |
508 | // should be kept. | |
509 | ||
510 | bool | |
511 | Pluginobj::include_comdat_group(std::string comdat_key, Layout* layout) | |
512 | { | |
513 | std::pair<Comdat_map::iterator, bool> ins = | |
514 | this->comdat_map_.insert(std::make_pair(comdat_key, false)); | |
515 | ||
516 | // If this is the first time we've seen this comdat key, ask the | |
517 | // layout object whether it should be included. | |
518 | if (ins.second) | |
1ef4d87f ILT |
519 | ins.first->second = layout->find_or_add_kept_section(comdat_key, |
520 | NULL, 0, true, | |
521 | true, NULL); | |
89fc3421 CC |
522 | |
523 | return ins.first->second; | |
524 | } | |
525 | ||
526 | // Class Sized_pluginobj. | |
527 | ||
528 | template<int size, bool big_endian> | |
529 | Sized_pluginobj<size, big_endian>::Sized_pluginobj( | |
530 | const std::string& name, | |
531 | Input_file* input_file, | |
0f7c0701 CC |
532 | off_t offset, |
533 | off_t filesize) | |
534 | : Pluginobj(name, input_file, offset, filesize) | |
89fc3421 CC |
535 | { |
536 | } | |
537 | ||
538 | // Read the symbols. Not used for plugin objects. | |
539 | ||
540 | template<int size, bool big_endian> | |
541 | void | |
542 | Sized_pluginobj<size, big_endian>::do_read_symbols(Read_symbols_data*) | |
543 | { | |
544 | gold_unreachable(); | |
545 | } | |
546 | ||
547 | // Lay out the input sections. Not used for plugin objects. | |
548 | ||
549 | template<int size, bool big_endian> | |
550 | void | |
551 | Sized_pluginobj<size, big_endian>::do_layout(Symbol_table*, Layout*, | |
552 | Read_symbols_data*) | |
553 | { | |
554 | gold_unreachable(); | |
555 | } | |
556 | ||
557 | // Add the symbols to the symbol table. | |
558 | ||
89fc3421 CC |
559 | template<int size, bool big_endian> |
560 | void | |
561 | Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table* symtab, | |
f488e4b0 | 562 | Read_symbols_data*, |
89fc3421 CC |
563 | Layout* layout) |
564 | { | |
565 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
566 | unsigned char symbuf[sym_size]; | |
567 | elfcpp::Sym<size, big_endian> sym(symbuf); | |
568 | elfcpp::Sym_write<size, big_endian> osym(symbuf); | |
569 | ||
570 | typedef typename elfcpp::Elf_types<size>::Elf_WXword Elf_size_type; | |
571 | ||
572 | this->symbols_.resize(this->nsyms_); | |
573 | ||
574 | for (int i = 0; i < this->nsyms_; ++i) | |
575 | { | |
576 | const struct ld_plugin_symbol *isym = &this->syms_[i]; | |
577 | const char* name = isym->name; | |
578 | const char* ver = isym->version; | |
579 | elfcpp::Elf_Half shndx; | |
580 | elfcpp::STB bind; | |
581 | elfcpp::STV vis; | |
582 | ||
583 | if (name != NULL && name[0] == '\0') | |
584 | name = NULL; | |
585 | if (ver != NULL && ver[0] == '\0') | |
586 | ver = NULL; | |
587 | ||
588 | switch (isym->def) | |
589 | { | |
590 | case LDPK_WEAKDEF: | |
591 | case LDPK_WEAKUNDEF: | |
592 | bind = elfcpp::STB_WEAK; | |
593 | break; | |
594 | case LDPK_DEF: | |
595 | case LDPK_UNDEF: | |
596 | case LDPK_COMMON: | |
597 | default: | |
598 | bind = elfcpp::STB_GLOBAL; | |
599 | break; | |
600 | } | |
601 | ||
602 | switch (isym->def) | |
603 | { | |
604 | case LDPK_DEF: | |
605 | case LDPK_WEAKDEF: | |
606 | shndx = elfcpp::SHN_ABS; | |
607 | break; | |
608 | case LDPK_COMMON: | |
609 | shndx = elfcpp::SHN_COMMON; | |
610 | break; | |
611 | case LDPK_UNDEF: | |
612 | case LDPK_WEAKUNDEF: | |
613 | default: | |
614 | shndx = elfcpp::SHN_UNDEF; | |
615 | break; | |
616 | } | |
617 | ||
618 | switch (isym->visibility) | |
619 | { | |
620 | case LDPV_PROTECTED: | |
621 | vis = elfcpp::STV_DEFAULT; | |
622 | break; | |
623 | case LDPV_INTERNAL: | |
624 | vis = elfcpp::STV_DEFAULT; | |
625 | break; | |
626 | case LDPV_HIDDEN: | |
627 | vis = elfcpp::STV_DEFAULT; | |
628 | break; | |
629 | case LDPV_DEFAULT: | |
630 | default: | |
631 | vis = elfcpp::STV_DEFAULT; | |
632 | break; | |
633 | } | |
634 | ||
635 | if (isym->comdat_key != NULL | |
636 | && isym->comdat_key[0] != '\0' | |
637 | && !this->include_comdat_group(isym->comdat_key, layout)) | |
638 | shndx = elfcpp::SHN_UNDEF; | |
639 | ||
640 | osym.put_st_name(0); | |
641 | osym.put_st_value(0); | |
642 | osym.put_st_size(static_cast<Elf_size_type>(isym->size)); | |
643 | osym.put_st_info(bind, elfcpp::STT_NOTYPE); | |
644 | osym.put_st_other(vis, 0); | |
645 | osym.put_st_shndx(shndx); | |
646 | ||
647 | this->symbols_[i] = | |
648 | symtab->add_from_pluginobj<size, big_endian>(this, name, ver, &sym); | |
649 | } | |
650 | } | |
651 | ||
652 | // Get the size of a section. Not used for plugin objects. | |
653 | ||
654 | template<int size, bool big_endian> | |
655 | uint64_t | |
656 | Sized_pluginobj<size, big_endian>::do_section_size(unsigned int) | |
657 | { | |
658 | gold_unreachable(); | |
659 | return 0; | |
660 | } | |
661 | ||
662 | // Get the name of a section. Not used for plugin objects. | |
663 | ||
664 | template<int size, bool big_endian> | |
665 | std::string | |
666 | Sized_pluginobj<size, big_endian>::do_section_name(unsigned int) | |
667 | { | |
668 | gold_unreachable(); | |
669 | return std::string(); | |
670 | } | |
671 | ||
672 | // Return a view of the contents of a section. Not used for plugin objects. | |
673 | ||
674 | template<int size, bool big_endian> | |
675 | Object::Location | |
676 | Sized_pluginobj<size, big_endian>::do_section_contents(unsigned int) | |
677 | { | |
678 | Location loc(0, 0); | |
679 | ||
680 | gold_unreachable(); | |
681 | return loc; | |
682 | } | |
683 | ||
684 | // Return section flags. Not used for plugin objects. | |
685 | ||
686 | template<int size, bool big_endian> | |
687 | uint64_t | |
688 | Sized_pluginobj<size, big_endian>::do_section_flags(unsigned int) | |
689 | { | |
690 | gold_unreachable(); | |
691 | return 0; | |
692 | } | |
693 | ||
ef15dade ST |
694 | // Return section entsize. Not used for plugin objects. |
695 | ||
696 | template<int size, bool big_endian> | |
697 | uint64_t | |
698 | Sized_pluginobj<size, big_endian>::do_section_entsize(unsigned int) | |
699 | { | |
700 | gold_unreachable(); | |
701 | return 0; | |
702 | } | |
703 | ||
89fc3421 CC |
704 | // Return section address. Not used for plugin objects. |
705 | ||
706 | template<int size, bool big_endian> | |
707 | uint64_t | |
708 | Sized_pluginobj<size, big_endian>::do_section_address(unsigned int) | |
709 | { | |
710 | gold_unreachable(); | |
711 | return 0; | |
712 | } | |
713 | ||
714 | // Return section type. Not used for plugin objects. | |
715 | ||
716 | template<int size, bool big_endian> | |
717 | unsigned int | |
718 | Sized_pluginobj<size, big_endian>::do_section_type(unsigned int) | |
719 | { | |
720 | gold_unreachable(); | |
721 | return 0; | |
722 | } | |
723 | ||
724 | // Return the section link field. Not used for plugin objects. | |
725 | ||
726 | template<int size, bool big_endian> | |
727 | unsigned int | |
728 | Sized_pluginobj<size, big_endian>::do_section_link(unsigned int) | |
729 | { | |
730 | gold_unreachable(); | |
731 | return 0; | |
732 | } | |
733 | ||
734 | // Return the section link field. Not used for plugin objects. | |
735 | ||
736 | template<int size, bool big_endian> | |
737 | unsigned int | |
738 | Sized_pluginobj<size, big_endian>::do_section_info(unsigned int) | |
739 | { | |
740 | gold_unreachable(); | |
741 | return 0; | |
742 | } | |
743 | ||
744 | // Return the section alignment. Not used for plugin objects. | |
745 | ||
746 | template<int size, bool big_endian> | |
747 | uint64_t | |
748 | Sized_pluginobj<size, big_endian>::do_section_addralign(unsigned int) | |
749 | { | |
750 | gold_unreachable(); | |
751 | return 0; | |
752 | } | |
753 | ||
754 | // Return the Xindex structure to use. Not used for plugin objects. | |
755 | ||
756 | template<int size, bool big_endian> | |
757 | Xindex* | |
758 | Sized_pluginobj<size, big_endian>::do_initialize_xindex() | |
759 | { | |
760 | gold_unreachable(); | |
761 | return NULL; | |
762 | } | |
763 | ||
764 | // Get symbol counts. Not used for plugin objects. | |
765 | ||
766 | template<int size, bool big_endian> | |
767 | void | |
768 | Sized_pluginobj<size, big_endian>::do_get_global_symbol_counts(const Symbol_table*, | |
769 | size_t*, size_t*) const | |
770 | { | |
771 | gold_unreachable(); | |
772 | } | |
773 | ||
5995b570 | 774 | // Class Plugin_finish. This task runs after all replacement files have |
6d03d481 | 775 | // been added. It calls each plugin's cleanup handler. |
89fc3421 | 776 | |
5995b570 | 777 | class Plugin_finish : public Task |
89fc3421 CC |
778 | { |
779 | public: | |
5995b570 | 780 | Plugin_finish(Task_token* this_blocker, Task_token* next_blocker) |
89fc3421 CC |
781 | : this_blocker_(this_blocker), next_blocker_(next_blocker) |
782 | { } | |
783 | ||
5995b570 | 784 | ~Plugin_finish() |
89fc3421 CC |
785 | { |
786 | if (this->this_blocker_ != NULL) | |
787 | delete this->this_blocker_; | |
788 | } | |
789 | ||
790 | Task_token* | |
791 | is_runnable() | |
792 | { | |
793 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
794 | return this->this_blocker_; | |
795 | return NULL; | |
796 | } | |
797 | ||
798 | void | |
799 | locks(Task_locker* tl) | |
800 | { tl->add(this, this->next_blocker_); } | |
801 | ||
802 | void | |
803 | run(Workqueue*) | |
483620e8 CC |
804 | { |
805 | Plugin_manager* plugins = parameters->options().plugins(); | |
806 | gold_assert(plugins != NULL); | |
483620e8 CC |
807 | plugins->cleanup(); |
808 | } | |
89fc3421 CC |
809 | |
810 | std::string | |
811 | get_name() const | |
5995b570 | 812 | { return "Plugin_finish"; } |
89fc3421 CC |
813 | |
814 | private: | |
815 | Task_token* this_blocker_; | |
816 | Task_token* next_blocker_; | |
817 | }; | |
818 | ||
819 | // Class Plugin_hook. | |
820 | ||
821 | Plugin_hook::~Plugin_hook() | |
822 | { | |
823 | } | |
824 | ||
825 | // Return whether a Plugin_hook task is runnable. | |
826 | ||
827 | Task_token* | |
828 | Plugin_hook::is_runnable() | |
829 | { | |
830 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
831 | return this->this_blocker_; | |
832 | return NULL; | |
833 | } | |
834 | ||
835 | // Return a Task_locker for a Plugin_hook task. We don't need any | |
836 | // locks here. | |
837 | ||
838 | void | |
839 | Plugin_hook::locks(Task_locker*) | |
840 | { | |
841 | } | |
842 | ||
89fc3421 CC |
843 | // Run the "all symbols read" plugin hook. |
844 | ||
845 | void | |
5995b570 | 846 | Plugin_hook::run(Workqueue* workqueue) |
89fc3421 CC |
847 | { |
848 | gold_assert(this->options_.has_plugins()); | |
849 | this->options_.plugins()->all_symbols_read(workqueue, | |
0f7c0701 | 850 | this, |
89fc3421 CC |
851 | this->input_objects_, |
852 | this->symtab_, | |
853 | this->layout_, | |
854 | this->dirpath_, | |
855 | this->mapfile_, | |
856 | &this->this_blocker_); | |
5995b570 CC |
857 | workqueue->queue_soon(new Plugin_finish(this->this_blocker_, |
858 | this->next_blocker_)); | |
89fc3421 CC |
859 | } |
860 | ||
861 | // The C interface routines called by the plugins. | |
862 | ||
863 | #ifdef ENABLE_PLUGINS | |
864 | ||
865 | // Register a claim-file handler. | |
866 | ||
867 | static enum ld_plugin_status | |
868 | register_claim_file(ld_plugin_claim_file_handler handler) | |
869 | { | |
870 | gold_assert(parameters->options().has_plugins()); | |
871 | parameters->options().plugins()->set_claim_file_handler(handler); | |
872 | return LDPS_OK; | |
873 | } | |
874 | ||
875 | // Register an all-symbols-read handler. | |
876 | ||
877 | static enum ld_plugin_status | |
878 | register_all_symbols_read(ld_plugin_all_symbols_read_handler handler) | |
879 | { | |
880 | gold_assert(parameters->options().has_plugins()); | |
881 | parameters->options().plugins()->set_all_symbols_read_handler(handler); | |
882 | return LDPS_OK; | |
883 | } | |
884 | ||
885 | // Register a cleanup handler. | |
886 | ||
887 | static enum ld_plugin_status | |
888 | register_cleanup(ld_plugin_cleanup_handler handler) | |
889 | { | |
890 | gold_assert(parameters->options().has_plugins()); | |
891 | parameters->options().plugins()->set_cleanup_handler(handler); | |
892 | return LDPS_OK; | |
893 | } | |
894 | ||
895 | // Add symbols from a plugin-claimed input file. | |
896 | ||
897 | static enum ld_plugin_status | |
898 | add_symbols(void* handle, int nsyms, const ld_plugin_symbol *syms) | |
899 | { | |
900 | gold_assert(parameters->options().has_plugins()); | |
901 | Pluginobj* obj = parameters->options().plugins()->make_plugin_object( | |
902 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
903 | if (obj == NULL) | |
904 | return LDPS_ERR; | |
905 | obj->store_incoming_symbols(nsyms, syms); | |
906 | return LDPS_OK; | |
907 | } | |
908 | ||
0f7c0701 CC |
909 | // Get the input file information with an open (possibly re-opened) |
910 | // file descriptor. | |
911 | ||
912 | static enum ld_plugin_status | |
913 | get_input_file(const void *handle, struct ld_plugin_input_file *file) | |
914 | { | |
915 | gold_assert(parameters->options().has_plugins()); | |
916 | unsigned int obj_index = | |
917 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
918 | return parameters->options().plugins()->get_input_file(obj_index, file); | |
919 | } | |
920 | ||
921 | // Release the input file. | |
922 | ||
923 | static enum ld_plugin_status | |
924 | release_input_file(const void *handle) | |
925 | { | |
926 | gold_assert(parameters->options().has_plugins()); | |
927 | unsigned int obj_index = | |
928 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
929 | return parameters->options().plugins()->release_input_file(obj_index); | |
930 | } | |
931 | ||
89fc3421 CC |
932 | // Get the symbol resolution info for a plugin-claimed input file. |
933 | ||
934 | static enum ld_plugin_status | |
935 | get_symbols(const void * handle, int nsyms, ld_plugin_symbol* syms) | |
936 | { | |
937 | gold_assert(parameters->options().has_plugins()); | |
938 | Pluginobj* obj = parameters->options().plugins()->object( | |
939 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
940 | if (obj == NULL) | |
941 | return LDPS_ERR; | |
942 | return obj->get_symbol_resolution_info(nsyms, syms); | |
943 | } | |
944 | ||
945 | // Add a new (real) input file generated by a plugin. | |
946 | ||
947 | static enum ld_plugin_status | |
948 | add_input_file(char *pathname) | |
949 | { | |
950 | gold_assert(parameters->options().has_plugins()); | |
e99daf92 ILT |
951 | return parameters->options().plugins()->add_input_file(pathname, false); |
952 | } | |
953 | ||
954 | // Add a new (real) library required by a plugin. | |
955 | ||
956 | static enum ld_plugin_status | |
957 | add_input_library(char *pathname) | |
958 | { | |
959 | gold_assert(parameters->options().has_plugins()); | |
960 | return parameters->options().plugins()->add_input_file(pathname, true); | |
89fc3421 CC |
961 | } |
962 | ||
963 | // Issue a diagnostic message from a plugin. | |
964 | ||
965 | static enum ld_plugin_status | |
6c52134c | 966 | message(int level, const char * format, ...) |
89fc3421 CC |
967 | { |
968 | va_list args; | |
969 | va_start(args, format); | |
970 | ||
971 | switch (level) | |
972 | { | |
973 | case LDPL_INFO: | |
974 | parameters->errors()->info(format, args); | |
975 | break; | |
976 | case LDPL_WARNING: | |
977 | parameters->errors()->warning(format, args); | |
978 | break; | |
979 | case LDPL_ERROR: | |
980 | default: | |
981 | parameters->errors()->error(format, args); | |
982 | break; | |
983 | case LDPL_FATAL: | |
984 | parameters->errors()->fatal(format, args); | |
985 | break; | |
986 | } | |
987 | ||
988 | va_end(args); | |
989 | return LDPS_OK; | |
990 | } | |
991 | ||
992 | #endif // ENABLE_PLUGINS | |
993 | ||
994 | // Allocate a Pluginobj object of the appropriate size and endianness. | |
995 | ||
996 | static Pluginobj* | |
0f7c0701 | 997 | make_sized_plugin_object(Input_file* input_file, off_t offset, off_t filesize) |
89fc3421 | 998 | { |
89fc3421 CC |
999 | Pluginobj* obj = NULL; |
1000 | ||
029ba973 ILT |
1001 | parameters_force_valid_target(); |
1002 | const Target& target(parameters->target()); | |
89fc3421 | 1003 | |
029ba973 | 1004 | if (target.get_size() == 32) |
89fc3421 | 1005 | { |
029ba973 | 1006 | if (target.is_big_endian()) |
92f03fcb | 1007 | #ifdef HAVE_TARGET_32_BIG |
89fc3421 | 1008 | obj = new Sized_pluginobj<32, true>(input_file->filename(), |
0f7c0701 | 1009 | input_file, offset, filesize); |
92f03fcb CC |
1010 | #else |
1011 | gold_error(_("%s: not configured to support " | |
1012 | "32-bit big-endian object"), | |
1013 | input_file->filename().c_str()); | |
89fc3421 | 1014 | #endif |
89fc3421 | 1015 | else |
92f03fcb | 1016 | #ifdef HAVE_TARGET_32_LITTLE |
89fc3421 | 1017 | obj = new Sized_pluginobj<32, false>(input_file->filename(), |
0f7c0701 | 1018 | input_file, offset, filesize); |
92f03fcb CC |
1019 | #else |
1020 | gold_error(_("%s: not configured to support " | |
1021 | "32-bit little-endian object"), | |
1022 | input_file->filename().c_str()); | |
89fc3421 CC |
1023 | #endif |
1024 | } | |
029ba973 | 1025 | else if (target.get_size() == 64) |
89fc3421 | 1026 | { |
029ba973 | 1027 | if (target.is_big_endian()) |
92f03fcb | 1028 | #ifdef HAVE_TARGET_64_BIG |
89fc3421 | 1029 | obj = new Sized_pluginobj<64, true>(input_file->filename(), |
0f7c0701 | 1030 | input_file, offset, filesize); |
92f03fcb CC |
1031 | #else |
1032 | gold_error(_("%s: not configured to support " | |
1033 | "64-bit big-endian object"), | |
1034 | input_file->filename().c_str()); | |
89fc3421 | 1035 | #endif |
89fc3421 | 1036 | else |
92f03fcb | 1037 | #ifdef HAVE_TARGET_64_LITTLE |
89fc3421 | 1038 | obj = new Sized_pluginobj<64, false>(input_file->filename(), |
0f7c0701 | 1039 | input_file, offset, filesize); |
92f03fcb CC |
1040 | #else |
1041 | gold_error(_("%s: not configured to support " | |
1042 | "64-bit little-endian object"), | |
1043 | input_file->filename().c_str()); | |
89fc3421 CC |
1044 | #endif |
1045 | } | |
1046 | ||
1047 | gold_assert(obj != NULL); | |
89fc3421 CC |
1048 | return obj; |
1049 | } | |
1050 | ||
1051 | } // End namespace gold. |