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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 | ||
1c7814ed ILT |
23 | #include "gold.h" |
24 | ||
89fc3421 CC |
25 | #include <cstdio> |
26 | #include <cstdarg> | |
27 | #include <cstring> | |
28 | #include <string> | |
29 | #include <vector> | |
bc06c745 ILT |
30 | |
31 | #ifdef ENABLE_PLUGINS | |
89fc3421 | 32 | #include <dlfcn.h> |
bc06c745 | 33 | #endif |
89fc3421 | 34 | |
89fc3421 CC |
35 | #include "parameters.h" |
36 | #include "errors.h" | |
37 | #include "fileread.h" | |
38 | #include "layout.h" | |
39 | #include "options.h" | |
40 | #include "plugin.h" | |
41 | #include "target.h" | |
42 | #include "readsyms.h" | |
43 | #include "symtab.h" | |
44 | #include "elfcpp.h" | |
45 | ||
46 | namespace gold | |
47 | { | |
48 | ||
49 | #ifdef ENABLE_PLUGINS | |
50 | ||
51 | // The linker's exported interfaces. | |
52 | ||
53 | extern "C" | |
54 | { | |
55 | ||
56 | static enum ld_plugin_status | |
57 | register_claim_file(ld_plugin_claim_file_handler handler); | |
58 | ||
59 | static enum ld_plugin_status | |
60 | register_all_symbols_read(ld_plugin_all_symbols_read_handler handler); | |
61 | ||
62 | static enum ld_plugin_status | |
63 | register_cleanup(ld_plugin_cleanup_handler handler); | |
64 | ||
65 | static enum ld_plugin_status | |
66 | add_symbols(void *handle, int nsyms, const struct ld_plugin_symbol *syms); | |
67 | ||
0f7c0701 CC |
68 | static enum ld_plugin_status |
69 | get_input_file(const void *handle, struct ld_plugin_input_file *file); | |
70 | ||
71 | static enum ld_plugin_status | |
72 | release_input_file(const void *handle); | |
73 | ||
89fc3421 CC |
74 | static enum ld_plugin_status |
75 | get_symbols(const void *handle, int nsyms, struct ld_plugin_symbol *syms); | |
76 | ||
77 | static enum ld_plugin_status | |
78 | add_input_file(char *pathname); | |
79 | ||
e99daf92 ILT |
80 | static enum ld_plugin_status |
81 | add_input_library(char *pathname); | |
82 | ||
89fc3421 | 83 | static enum ld_plugin_status |
6c52134c | 84 | message(int level, const char *format, ...); |
89fc3421 CC |
85 | |
86 | }; | |
87 | ||
88 | #endif // ENABLE_PLUGINS | |
89 | ||
90 | static Pluginobj* make_sized_plugin_object(Input_file* input_file, | |
0f7c0701 | 91 | off_t offset, off_t filesize); |
89fc3421 CC |
92 | |
93 | // Plugin methods. | |
94 | ||
95 | // Load one plugin library. | |
96 | ||
97 | void | |
98 | Plugin::load() | |
99 | { | |
100 | #ifdef ENABLE_PLUGINS | |
89fc3421 CC |
101 | // Load the plugin library. |
102 | // FIXME: Look for the library in standard locations. | |
4674ecfc | 103 | this->handle_ = dlopen(this->filename_.c_str(), RTLD_NOW); |
89fc3421 CC |
104 | if (this->handle_ == NULL) |
105 | { | |
4674ecfc CC |
106 | gold_error(_("%s: could not load plugin library"), |
107 | this->filename_.c_str()); | |
89fc3421 CC |
108 | return; |
109 | } | |
110 | ||
111 | // Find the plugin's onload entry point. | |
b59befec ILT |
112 | void* ptr = dlsym(this->handle_, "onload"); |
113 | if (ptr == NULL) | |
89fc3421 | 114 | { |
4674ecfc CC |
115 | gold_error(_("%s: could not find onload entry point"), |
116 | this->filename_.c_str()); | |
89fc3421 CC |
117 | return; |
118 | } | |
b59befec ILT |
119 | ld_plugin_onload onload; |
120 | gold_assert(sizeof(onload) == sizeof(ptr)); | |
121 | memcpy(&onload, &ptr, sizeof(ptr)); | |
89fc3421 CC |
122 | |
123 | // Get the linker's version number. | |
124 | const char* ver = get_version_string(); | |
125 | int major = 0; | |
126 | int minor = 0; | |
127 | sscanf(ver, "%d.%d", &major, &minor); | |
128 | ||
129 | // Allocate and populate a transfer vector. | |
e99daf92 | 130 | const int tv_fixed_size = 14; |
4674ecfc | 131 | int tv_size = this->args_.size() + tv_fixed_size; |
89fc3421 CC |
132 | ld_plugin_tv *tv = new ld_plugin_tv[tv_size]; |
133 | ||
abc8dcba CC |
134 | // Put LDPT_MESSAGE at the front of the list so the plugin can use it |
135 | // while processing subsequent entries. | |
89fc3421 | 136 | int i = 0; |
abc8dcba CC |
137 | tv[i].tv_tag = LDPT_MESSAGE; |
138 | tv[i].tv_u.tv_message = message; | |
139 | ||
140 | ++i; | |
89fc3421 CC |
141 | tv[i].tv_tag = LDPT_API_VERSION; |
142 | tv[i].tv_u.tv_val = LD_PLUGIN_API_VERSION; | |
143 | ||
144 | ++i; | |
145 | tv[i].tv_tag = LDPT_GOLD_VERSION; | |
146 | tv[i].tv_u.tv_val = major * 100 + minor; | |
147 | ||
148 | ++i; | |
149 | tv[i].tv_tag = LDPT_LINKER_OUTPUT; | |
150 | if (parameters->options().relocatable()) | |
151 | tv[i].tv_u.tv_val = LDPO_REL; | |
152 | else if (parameters->options().shared()) | |
153 | tv[i].tv_u.tv_val = LDPO_DYN; | |
154 | else | |
155 | tv[i].tv_u.tv_val = LDPO_EXEC; | |
156 | ||
4674ecfc | 157 | for (unsigned int j = 0; j < this->args_.size(); ++j) |
89fc3421 CC |
158 | { |
159 | ++i; | |
160 | tv[i].tv_tag = LDPT_OPTION; | |
4674ecfc | 161 | tv[i].tv_u.tv_string = this->args_[j].c_str(); |
89fc3421 CC |
162 | } |
163 | ||
164 | ++i; | |
165 | tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK; | |
166 | tv[i].tv_u.tv_register_claim_file = register_claim_file; | |
167 | ||
168 | ++i; | |
169 | tv[i].tv_tag = LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK; | |
170 | tv[i].tv_u.tv_register_all_symbols_read = register_all_symbols_read; | |
171 | ||
172 | ++i; | |
173 | tv[i].tv_tag = LDPT_REGISTER_CLEANUP_HOOK; | |
174 | tv[i].tv_u.tv_register_cleanup = register_cleanup; | |
175 | ||
176 | ++i; | |
177 | tv[i].tv_tag = LDPT_ADD_SYMBOLS; | |
178 | tv[i].tv_u.tv_add_symbols = add_symbols; | |
179 | ||
0f7c0701 CC |
180 | ++i; |
181 | tv[i].tv_tag = LDPT_GET_INPUT_FILE; | |
182 | tv[i].tv_u.tv_get_input_file = get_input_file; | |
183 | ||
184 | ++i; | |
185 | tv[i].tv_tag = LDPT_RELEASE_INPUT_FILE; | |
186 | tv[i].tv_u.tv_release_input_file = release_input_file; | |
187 | ||
89fc3421 CC |
188 | ++i; |
189 | tv[i].tv_tag = LDPT_GET_SYMBOLS; | |
190 | tv[i].tv_u.tv_get_symbols = get_symbols; | |
191 | ||
192 | ++i; | |
193 | tv[i].tv_tag = LDPT_ADD_INPUT_FILE; | |
194 | tv[i].tv_u.tv_add_input_file = add_input_file; | |
195 | ||
e99daf92 ILT |
196 | ++i; |
197 | tv[i].tv_tag = LDPT_ADD_INPUT_LIBRARY; | |
198 | tv[i].tv_u.tv_add_input_library = add_input_library; | |
199 | ||
89fc3421 CC |
200 | ++i; |
201 | tv[i].tv_tag = LDPT_NULL; | |
202 | tv[i].tv_u.tv_val = 0; | |
203 | ||
204 | gold_assert(i == tv_size - 1); | |
205 | ||
206 | // Call the onload entry point. | |
207 | (*onload)(tv); | |
208 | ||
6c52134c | 209 | delete[] tv; |
89fc3421 CC |
210 | #endif // ENABLE_PLUGINS |
211 | } | |
212 | ||
213 | // Call the plugin claim-file handler. | |
214 | ||
215 | inline bool | |
216 | Plugin::claim_file(struct ld_plugin_input_file *plugin_input_file) | |
217 | { | |
218 | int claimed = 0; | |
219 | ||
220 | if (this->claim_file_handler_ != NULL) | |
221 | { | |
222 | (*this->claim_file_handler_)(plugin_input_file, &claimed); | |
223 | if (claimed) | |
224 | return true; | |
225 | } | |
226 | return false; | |
227 | } | |
228 | ||
229 | // Call the all-symbols-read handler. | |
230 | ||
231 | inline void | |
232 | Plugin::all_symbols_read() | |
233 | { | |
234 | if (this->all_symbols_read_handler_ != NULL) | |
235 | (*this->all_symbols_read_handler_)(); | |
236 | } | |
237 | ||
238 | // Call the cleanup handler. | |
239 | ||
240 | inline void | |
241 | Plugin::cleanup() | |
242 | { | |
40f36857 CC |
243 | if (this->cleanup_handler_ != NULL && !this->cleanup_done_) |
244 | { | |
245 | // Set this flag before calling to prevent a recursive plunge | |
246 | // in the event that a plugin's cleanup handler issues a | |
247 | // fatal error. | |
248 | this->cleanup_done_ = true; | |
249 | (*this->cleanup_handler_)(); | |
250 | } | |
89fc3421 CC |
251 | } |
252 | ||
253 | // Plugin_manager methods. | |
254 | ||
255 | Plugin_manager::~Plugin_manager() | |
256 | { | |
257 | for (Plugin_list::iterator p = this->plugins_.begin(); | |
258 | p != this->plugins_.end(); | |
259 | ++p) | |
260 | delete *p; | |
261 | this->plugins_.clear(); | |
262 | for (Object_list::iterator obj = this->objects_.begin(); | |
263 | obj != this->objects_.end(); | |
264 | ++obj) | |
265 | delete *obj; | |
266 | this->objects_.clear(); | |
267 | } | |
268 | ||
269 | // Load all plugin libraries. | |
270 | ||
271 | void | |
272 | Plugin_manager::load_plugins() | |
273 | { | |
274 | for (this->current_ = this->plugins_.begin(); | |
275 | this->current_ != this->plugins_.end(); | |
276 | ++this->current_) | |
277 | (*this->current_)->load(); | |
278 | } | |
279 | ||
280 | // Call the plugin claim-file handlers in turn to see if any claim the file. | |
281 | ||
282 | Pluginobj* | |
283 | Plugin_manager::claim_file(Input_file* input_file, off_t offset, | |
284 | off_t filesize) | |
285 | { | |
286 | if (this->in_replacement_phase_) | |
287 | return NULL; | |
288 | ||
289 | unsigned int handle = this->objects_.size(); | |
290 | this->input_file_ = input_file; | |
291 | this->plugin_input_file_.name = input_file->filename().c_str(); | |
292 | this->plugin_input_file_.fd = input_file->file().descriptor(); | |
293 | this->plugin_input_file_.offset = offset; | |
294 | this->plugin_input_file_.filesize = filesize; | |
295 | this->plugin_input_file_.handle = reinterpret_cast<void*>(handle); | |
296 | ||
297 | for (this->current_ = this->plugins_.begin(); | |
298 | this->current_ != this->plugins_.end(); | |
299 | ++this->current_) | |
300 | { | |
301 | if ((*this->current_)->claim_file(&this->plugin_input_file_)) | |
302 | { | |
abc8dcba CC |
303 | if (this->objects_.size() > handle) |
304 | return this->objects_[handle]; | |
305 | ||
306 | // If the plugin claimed the file but did not call the | |
307 | // add_symbols callback, we need to create the Pluginobj now. | |
308 | Pluginobj* obj = this->make_plugin_object(handle); | |
309 | return obj; | |
89fc3421 CC |
310 | } |
311 | } | |
312 | ||
313 | return NULL; | |
314 | } | |
315 | ||
316 | // Call the all-symbols-read handlers. | |
317 | ||
318 | void | |
0f7c0701 | 319 | Plugin_manager::all_symbols_read(Workqueue* workqueue, Task* task, |
89fc3421 | 320 | Input_objects* input_objects, |
91d6fa6a | 321 | Symbol_table* symtab, Layout* alayout, |
89fc3421 CC |
322 | Dirsearch* dirpath, Mapfile* mapfile, |
323 | Task_token** last_blocker) | |
324 | { | |
325 | this->in_replacement_phase_ = true; | |
326 | this->workqueue_ = workqueue; | |
0f7c0701 | 327 | this->task_ = task; |
89fc3421 CC |
328 | this->input_objects_ = input_objects; |
329 | this->symtab_ = symtab; | |
91d6fa6a | 330 | this->layout_ = alayout; |
89fc3421 CC |
331 | this->dirpath_ = dirpath; |
332 | this->mapfile_ = mapfile; | |
333 | this->this_blocker_ = NULL; | |
334 | ||
335 | for (this->current_ = this->plugins_.begin(); | |
336 | this->current_ != this->plugins_.end(); | |
337 | ++this->current_) | |
338 | (*this->current_)->all_symbols_read(); | |
339 | ||
340 | *last_blocker = this->this_blocker_; | |
341 | } | |
342 | ||
483620e8 | 343 | // Layout deferred objects. |
89fc3421 CC |
344 | |
345 | void | |
483620e8 | 346 | Plugin_manager::layout_deferred_objects() |
89fc3421 | 347 | { |
5995b570 CC |
348 | Deferred_layout_list::iterator obj; |
349 | ||
350 | for (obj = this->deferred_layout_objects_.begin(); | |
351 | obj != this->deferred_layout_objects_.end(); | |
352 | ++obj) | |
353 | (*obj)->layout_deferred_sections(this->layout_); | |
483620e8 CC |
354 | } |
355 | ||
356 | // Call the cleanup handlers. | |
5995b570 | 357 | |
483620e8 CC |
358 | void |
359 | Plugin_manager::cleanup() | |
360 | { | |
89fc3421 CC |
361 | for (this->current_ = this->plugins_.begin(); |
362 | this->current_ != this->plugins_.end(); | |
363 | ++this->current_) | |
364 | (*this->current_)->cleanup(); | |
365 | } | |
366 | ||
367 | // Make a new Pluginobj object. This is called when the plugin calls | |
368 | // the add_symbols API. | |
369 | ||
370 | Pluginobj* | |
371 | Plugin_manager::make_plugin_object(unsigned int handle) | |
372 | { | |
373 | // Make sure we aren't asked to make an object for the same handle twice. | |
374 | if (this->objects_.size() != handle) | |
375 | return NULL; | |
376 | ||
377 | Pluginobj* obj = make_sized_plugin_object(this->input_file_, | |
0f7c0701 CC |
378 | this->plugin_input_file_.offset, |
379 | this->plugin_input_file_.filesize); | |
89fc3421 CC |
380 | this->objects_.push_back(obj); |
381 | return obj; | |
382 | } | |
383 | ||
0f7c0701 CC |
384 | // Get the input file information with an open (possibly re-opened) |
385 | // file descriptor. | |
386 | ||
387 | ld_plugin_status | |
388 | Plugin_manager::get_input_file(unsigned int handle, | |
389 | struct ld_plugin_input_file *file) | |
390 | { | |
391 | Pluginobj* obj = this->object(handle); | |
392 | if (obj == NULL) | |
393 | return LDPS_BAD_HANDLE; | |
394 | ||
395 | obj->lock(this->task_); | |
396 | file->name = obj->filename().c_str(); | |
397 | file->fd = obj->descriptor(); | |
398 | file->offset = obj->offset(); | |
399 | file->filesize = obj->filesize(); | |
400 | file->handle = reinterpret_cast<void*>(handle); | |
401 | return LDPS_OK; | |
402 | } | |
403 | ||
404 | // Release the input file. | |
405 | ||
406 | ld_plugin_status | |
407 | Plugin_manager::release_input_file(unsigned int handle) | |
408 | { | |
409 | Pluginobj* obj = this->object(handle); | |
410 | if (obj == NULL) | |
411 | return LDPS_BAD_HANDLE; | |
412 | ||
413 | obj->unlock(this->task_); | |
414 | return LDPS_OK; | |
415 | } | |
416 | ||
89fc3421 CC |
417 | // Add a new input file. |
418 | ||
419 | ld_plugin_status | |
e99daf92 | 420 | Plugin_manager::add_input_file(char *pathname, bool is_lib) |
89fc3421 | 421 | { |
ae3b5189 CD |
422 | Input_file_argument file(pathname, |
423 | (is_lib | |
424 | ? Input_file_argument::INPUT_FILE_TYPE_LIBRARY | |
425 | : Input_file_argument::INPUT_FILE_TYPE_FILE), | |
426 | "", false, this->options_); | |
89fc3421 CC |
427 | Input_argument* input_argument = new Input_argument(file); |
428 | Task_token* next_blocker = new Task_token(true); | |
429 | next_blocker->add_blocker(); | |
072fe7ce | 430 | if (this->layout_->incremental_inputs()) |
40f36857 CC |
431 | gold_error(_("input files added by plug-ins in --incremental mode not " |
432 | "supported yet")); | |
f1ed28fb | 433 | this->workqueue_->queue_soon(new Read_symbols(this->input_objects_, |
89fc3421 CC |
434 | this->symtab_, |
435 | this->layout_, | |
436 | this->dirpath_, | |
15f8229b | 437 | 0, |
89fc3421 CC |
438 | this->mapfile_, |
439 | input_argument, | |
440 | NULL, | |
441 | this->this_blocker_, | |
442 | next_blocker)); | |
443 | this->this_blocker_ = next_blocker; | |
444 | return LDPS_OK; | |
445 | } | |
446 | ||
447 | // Class Pluginobj. | |
448 | ||
91d6fa6a NC |
449 | Pluginobj::Pluginobj(const std::string& aname, Input_file* ainput_file, |
450 | off_t aoffset, off_t afilesize) | |
451 | : Object(aname, ainput_file, false, aoffset), | |
452 | nsyms_(0), syms_(NULL), symbols_(), filesize_(afilesize), comdat_map_() | |
89fc3421 CC |
453 | { |
454 | } | |
455 | ||
d66a9eb3 CC |
456 | // Return TRUE if a defined symbol might be reachable from outside the |
457 | // universe of claimed objects. | |
458 | ||
459 | static inline bool | |
460 | is_visible_from_outside(Symbol* lsym) | |
461 | { | |
462 | if (lsym->in_real_elf()) | |
463 | return true; | |
464 | if (parameters->options().relocatable()) | |
465 | return true; | |
466 | if (parameters->options().export_dynamic() || parameters->options().shared()) | |
467 | return lsym->is_externally_visible(); | |
468 | return false; | |
469 | } | |
470 | ||
89fc3421 CC |
471 | // Get symbol resolution info. |
472 | ||
473 | ld_plugin_status | |
474 | Pluginobj::get_symbol_resolution_info(int nsyms, ld_plugin_symbol* syms) const | |
475 | { | |
abc8dcba | 476 | if (nsyms > this->nsyms_) |
89fc3421 CC |
477 | return LDPS_NO_SYMS; |
478 | for (int i = 0; i < nsyms; i++) | |
479 | { | |
480 | ld_plugin_symbol* isym = &syms[i]; | |
481 | Symbol* lsym = this->symbols_[i]; | |
482 | ld_plugin_symbol_resolution res = LDPR_UNKNOWN; | |
483 | ||
484 | if (lsym->is_undefined()) | |
485 | // The symbol remains undefined. | |
486 | res = LDPR_UNDEF; | |
487 | else if (isym->def == LDPK_UNDEF | |
488 | || isym->def == LDPK_WEAKUNDEF | |
489 | || isym->def == LDPK_COMMON) | |
490 | { | |
491 | // The original symbol was undefined or common. | |
492 | if (lsym->source() != Symbol::FROM_OBJECT) | |
493 | res = LDPR_RESOLVED_EXEC; | |
494 | else if (lsym->object()->pluginobj() != NULL) | |
495 | res = LDPR_RESOLVED_IR; | |
496 | else if (lsym->object()->is_dynamic()) | |
497 | res = LDPR_RESOLVED_DYN; | |
498 | else | |
499 | res = LDPR_RESOLVED_EXEC; | |
500 | } | |
501 | else | |
502 | { | |
503 | // The original symbol was a definition. | |
504 | if (lsym->source() != Symbol::FROM_OBJECT) | |
505 | res = LDPR_PREEMPTED_REG; | |
506 | else if (lsym->object() == static_cast<const Object*>(this)) | |
d66a9eb3 | 507 | res = (is_visible_from_outside(lsym) |
89fc3421 CC |
508 | ? LDPR_PREVAILING_DEF |
509 | : LDPR_PREVAILING_DEF_IRONLY); | |
510 | else | |
511 | res = (lsym->object()->pluginobj() != NULL | |
512 | ? LDPR_PREEMPTED_IR | |
513 | : LDPR_PREEMPTED_REG); | |
514 | } | |
515 | isym->resolution = res; | |
516 | } | |
517 | return LDPS_OK; | |
518 | } | |
519 | ||
520 | // Return TRUE if the comdat group with key COMDAT_KEY from this object | |
521 | // should be kept. | |
522 | ||
523 | bool | |
91d6fa6a | 524 | Pluginobj::include_comdat_group(std::string comdat_key, Layout* alayout) |
89fc3421 CC |
525 | { |
526 | std::pair<Comdat_map::iterator, bool> ins = | |
527 | this->comdat_map_.insert(std::make_pair(comdat_key, false)); | |
528 | ||
529 | // If this is the first time we've seen this comdat key, ask the | |
530 | // layout object whether it should be included. | |
531 | if (ins.second) | |
91d6fa6a NC |
532 | ins.first->second = alayout->find_or_add_kept_section(comdat_key, |
533 | NULL, 0, true, | |
534 | true, NULL); | |
89fc3421 CC |
535 | |
536 | return ins.first->second; | |
537 | } | |
538 | ||
539 | // Class Sized_pluginobj. | |
540 | ||
541 | template<int size, bool big_endian> | |
542 | Sized_pluginobj<size, big_endian>::Sized_pluginobj( | |
91d6fa6a NC |
543 | const std::string& aname, |
544 | Input_file* ainput_file, | |
545 | off_t aoffset, | |
546 | off_t afilesize) | |
547 | : Pluginobj(aname, ainput_file, aoffset, afilesize) | |
89fc3421 CC |
548 | { |
549 | } | |
550 | ||
551 | // Read the symbols. Not used for plugin objects. | |
552 | ||
553 | template<int size, bool big_endian> | |
554 | void | |
555 | Sized_pluginobj<size, big_endian>::do_read_symbols(Read_symbols_data*) | |
556 | { | |
557 | gold_unreachable(); | |
558 | } | |
559 | ||
560 | // Lay out the input sections. Not used for plugin objects. | |
561 | ||
562 | template<int size, bool big_endian> | |
563 | void | |
564 | Sized_pluginobj<size, big_endian>::do_layout(Symbol_table*, Layout*, | |
565 | Read_symbols_data*) | |
566 | { | |
567 | gold_unreachable(); | |
568 | } | |
569 | ||
570 | // Add the symbols to the symbol table. | |
571 | ||
89fc3421 CC |
572 | template<int size, bool big_endian> |
573 | void | |
574 | Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table* symtab, | |
f488e4b0 | 575 | Read_symbols_data*, |
91d6fa6a | 576 | Layout* alayout) |
89fc3421 CC |
577 | { |
578 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
579 | unsigned char symbuf[sym_size]; | |
580 | elfcpp::Sym<size, big_endian> sym(symbuf); | |
581 | elfcpp::Sym_write<size, big_endian> osym(symbuf); | |
582 | ||
583 | typedef typename elfcpp::Elf_types<size>::Elf_WXword Elf_size_type; | |
584 | ||
585 | this->symbols_.resize(this->nsyms_); | |
586 | ||
587 | for (int i = 0; i < this->nsyms_; ++i) | |
588 | { | |
589 | const struct ld_plugin_symbol *isym = &this->syms_[i]; | |
91d6fa6a | 590 | const char* aname = isym->name; |
89fc3421 CC |
591 | const char* ver = isym->version; |
592 | elfcpp::Elf_Half shndx; | |
593 | elfcpp::STB bind; | |
594 | elfcpp::STV vis; | |
595 | ||
91d6fa6a NC |
596 | if (aname != NULL && aname[0] == '\0') |
597 | aname = NULL; | |
89fc3421 CC |
598 | if (ver != NULL && ver[0] == '\0') |
599 | ver = NULL; | |
600 | ||
601 | switch (isym->def) | |
602 | { | |
603 | case LDPK_WEAKDEF: | |
604 | case LDPK_WEAKUNDEF: | |
605 | bind = elfcpp::STB_WEAK; | |
606 | break; | |
607 | case LDPK_DEF: | |
608 | case LDPK_UNDEF: | |
609 | case LDPK_COMMON: | |
610 | default: | |
611 | bind = elfcpp::STB_GLOBAL; | |
612 | break; | |
613 | } | |
614 | ||
615 | switch (isym->def) | |
616 | { | |
617 | case LDPK_DEF: | |
618 | case LDPK_WEAKDEF: | |
619 | shndx = elfcpp::SHN_ABS; | |
620 | break; | |
621 | case LDPK_COMMON: | |
622 | shndx = elfcpp::SHN_COMMON; | |
623 | break; | |
624 | case LDPK_UNDEF: | |
625 | case LDPK_WEAKUNDEF: | |
626 | default: | |
627 | shndx = elfcpp::SHN_UNDEF; | |
628 | break; | |
629 | } | |
630 | ||
631 | switch (isym->visibility) | |
632 | { | |
633 | case LDPV_PROTECTED: | |
634 | vis = elfcpp::STV_DEFAULT; | |
635 | break; | |
636 | case LDPV_INTERNAL: | |
637 | vis = elfcpp::STV_DEFAULT; | |
638 | break; | |
639 | case LDPV_HIDDEN: | |
640 | vis = elfcpp::STV_DEFAULT; | |
641 | break; | |
642 | case LDPV_DEFAULT: | |
643 | default: | |
644 | vis = elfcpp::STV_DEFAULT; | |
645 | break; | |
646 | } | |
647 | ||
648 | if (isym->comdat_key != NULL | |
649 | && isym->comdat_key[0] != '\0' | |
91d6fa6a | 650 | && !this->include_comdat_group(isym->comdat_key, alayout)) |
89fc3421 CC |
651 | shndx = elfcpp::SHN_UNDEF; |
652 | ||
653 | osym.put_st_name(0); | |
654 | osym.put_st_value(0); | |
655 | osym.put_st_size(static_cast<Elf_size_type>(isym->size)); | |
656 | osym.put_st_info(bind, elfcpp::STT_NOTYPE); | |
657 | osym.put_st_other(vis, 0); | |
658 | osym.put_st_shndx(shndx); | |
659 | ||
660 | this->symbols_[i] = | |
91d6fa6a | 661 | symtab->add_from_pluginobj<size, big_endian>(this, aname, ver, &sym); |
89fc3421 CC |
662 | } |
663 | } | |
664 | ||
665 | // Get the size of a section. Not used for plugin objects. | |
666 | ||
667 | template<int size, bool big_endian> | |
668 | uint64_t | |
669 | Sized_pluginobj<size, big_endian>::do_section_size(unsigned int) | |
670 | { | |
671 | gold_unreachable(); | |
672 | return 0; | |
673 | } | |
674 | ||
675 | // Get the name of a section. Not used for plugin objects. | |
676 | ||
677 | template<int size, bool big_endian> | |
678 | std::string | |
679 | Sized_pluginobj<size, big_endian>::do_section_name(unsigned int) | |
680 | { | |
681 | gold_unreachable(); | |
682 | return std::string(); | |
683 | } | |
684 | ||
685 | // Return a view of the contents of a section. Not used for plugin objects. | |
686 | ||
687 | template<int size, bool big_endian> | |
688 | Object::Location | |
689 | Sized_pluginobj<size, big_endian>::do_section_contents(unsigned int) | |
690 | { | |
691 | Location loc(0, 0); | |
692 | ||
693 | gold_unreachable(); | |
694 | return loc; | |
695 | } | |
696 | ||
697 | // Return section flags. Not used for plugin objects. | |
698 | ||
699 | template<int size, bool big_endian> | |
700 | uint64_t | |
701 | Sized_pluginobj<size, big_endian>::do_section_flags(unsigned int) | |
702 | { | |
703 | gold_unreachable(); | |
704 | return 0; | |
705 | } | |
706 | ||
ef15dade ST |
707 | // Return section entsize. Not used for plugin objects. |
708 | ||
709 | template<int size, bool big_endian> | |
710 | uint64_t | |
711 | Sized_pluginobj<size, big_endian>::do_section_entsize(unsigned int) | |
712 | { | |
713 | gold_unreachable(); | |
714 | return 0; | |
715 | } | |
716 | ||
89fc3421 CC |
717 | // Return section address. Not used for plugin objects. |
718 | ||
719 | template<int size, bool big_endian> | |
720 | uint64_t | |
721 | Sized_pluginobj<size, big_endian>::do_section_address(unsigned int) | |
722 | { | |
723 | gold_unreachable(); | |
724 | return 0; | |
725 | } | |
726 | ||
727 | // Return section type. Not used for plugin objects. | |
728 | ||
729 | template<int size, bool big_endian> | |
730 | unsigned int | |
731 | Sized_pluginobj<size, big_endian>::do_section_type(unsigned int) | |
732 | { | |
733 | gold_unreachable(); | |
734 | return 0; | |
735 | } | |
736 | ||
737 | // Return the section link field. Not used for plugin objects. | |
738 | ||
739 | template<int size, bool big_endian> | |
740 | unsigned int | |
741 | Sized_pluginobj<size, big_endian>::do_section_link(unsigned int) | |
742 | { | |
743 | gold_unreachable(); | |
744 | return 0; | |
745 | } | |
746 | ||
747 | // Return the section link field. Not used for plugin objects. | |
748 | ||
749 | template<int size, bool big_endian> | |
750 | unsigned int | |
751 | Sized_pluginobj<size, big_endian>::do_section_info(unsigned int) | |
752 | { | |
753 | gold_unreachable(); | |
754 | return 0; | |
755 | } | |
756 | ||
757 | // Return the section alignment. Not used for plugin objects. | |
758 | ||
759 | template<int size, bool big_endian> | |
760 | uint64_t | |
761 | Sized_pluginobj<size, big_endian>::do_section_addralign(unsigned int) | |
762 | { | |
763 | gold_unreachable(); | |
764 | return 0; | |
765 | } | |
766 | ||
767 | // Return the Xindex structure to use. Not used for plugin objects. | |
768 | ||
769 | template<int size, bool big_endian> | |
770 | Xindex* | |
771 | Sized_pluginobj<size, big_endian>::do_initialize_xindex() | |
772 | { | |
773 | gold_unreachable(); | |
774 | return NULL; | |
775 | } | |
776 | ||
777 | // Get symbol counts. Not used for plugin objects. | |
778 | ||
779 | template<int size, bool big_endian> | |
780 | void | |
781 | Sized_pluginobj<size, big_endian>::do_get_global_symbol_counts(const Symbol_table*, | |
782 | size_t*, size_t*) const | |
783 | { | |
784 | gold_unreachable(); | |
785 | } | |
786 | ||
5995b570 | 787 | // Class Plugin_finish. This task runs after all replacement files have |
6d03d481 | 788 | // been added. It calls each plugin's cleanup handler. |
89fc3421 | 789 | |
5995b570 | 790 | class Plugin_finish : public Task |
89fc3421 CC |
791 | { |
792 | public: | |
5995b570 | 793 | Plugin_finish(Task_token* this_blocker, Task_token* next_blocker) |
89fc3421 CC |
794 | : this_blocker_(this_blocker), next_blocker_(next_blocker) |
795 | { } | |
796 | ||
5995b570 | 797 | ~Plugin_finish() |
89fc3421 CC |
798 | { |
799 | if (this->this_blocker_ != NULL) | |
800 | delete this->this_blocker_; | |
801 | } | |
802 | ||
803 | Task_token* | |
804 | is_runnable() | |
805 | { | |
806 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
807 | return this->this_blocker_; | |
808 | return NULL; | |
809 | } | |
810 | ||
811 | void | |
812 | locks(Task_locker* tl) | |
813 | { tl->add(this, this->next_blocker_); } | |
814 | ||
815 | void | |
816 | run(Workqueue*) | |
483620e8 CC |
817 | { |
818 | Plugin_manager* plugins = parameters->options().plugins(); | |
819 | gold_assert(plugins != NULL); | |
483620e8 CC |
820 | plugins->cleanup(); |
821 | } | |
89fc3421 CC |
822 | |
823 | std::string | |
824 | get_name() const | |
5995b570 | 825 | { return "Plugin_finish"; } |
89fc3421 CC |
826 | |
827 | private: | |
828 | Task_token* this_blocker_; | |
829 | Task_token* next_blocker_; | |
830 | }; | |
831 | ||
832 | // Class Plugin_hook. | |
833 | ||
834 | Plugin_hook::~Plugin_hook() | |
835 | { | |
836 | } | |
837 | ||
838 | // Return whether a Plugin_hook task is runnable. | |
839 | ||
840 | Task_token* | |
841 | Plugin_hook::is_runnable() | |
842 | { | |
843 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
844 | return this->this_blocker_; | |
845 | return NULL; | |
846 | } | |
847 | ||
848 | // Return a Task_locker for a Plugin_hook task. We don't need any | |
849 | // locks here. | |
850 | ||
851 | void | |
852 | Plugin_hook::locks(Task_locker*) | |
853 | { | |
854 | } | |
855 | ||
89fc3421 CC |
856 | // Run the "all symbols read" plugin hook. |
857 | ||
858 | void | |
5995b570 | 859 | Plugin_hook::run(Workqueue* workqueue) |
89fc3421 CC |
860 | { |
861 | gold_assert(this->options_.has_plugins()); | |
862 | this->options_.plugins()->all_symbols_read(workqueue, | |
0f7c0701 | 863 | this, |
89fc3421 CC |
864 | this->input_objects_, |
865 | this->symtab_, | |
866 | this->layout_, | |
867 | this->dirpath_, | |
868 | this->mapfile_, | |
869 | &this->this_blocker_); | |
5995b570 CC |
870 | workqueue->queue_soon(new Plugin_finish(this->this_blocker_, |
871 | this->next_blocker_)); | |
89fc3421 CC |
872 | } |
873 | ||
874 | // The C interface routines called by the plugins. | |
875 | ||
876 | #ifdef ENABLE_PLUGINS | |
877 | ||
878 | // Register a claim-file handler. | |
879 | ||
880 | static enum ld_plugin_status | |
881 | register_claim_file(ld_plugin_claim_file_handler handler) | |
882 | { | |
883 | gold_assert(parameters->options().has_plugins()); | |
884 | parameters->options().plugins()->set_claim_file_handler(handler); | |
885 | return LDPS_OK; | |
886 | } | |
887 | ||
888 | // Register an all-symbols-read handler. | |
889 | ||
890 | static enum ld_plugin_status | |
891 | register_all_symbols_read(ld_plugin_all_symbols_read_handler handler) | |
892 | { | |
893 | gold_assert(parameters->options().has_plugins()); | |
894 | parameters->options().plugins()->set_all_symbols_read_handler(handler); | |
895 | return LDPS_OK; | |
896 | } | |
897 | ||
898 | // Register a cleanup handler. | |
899 | ||
900 | static enum ld_plugin_status | |
901 | register_cleanup(ld_plugin_cleanup_handler handler) | |
902 | { | |
903 | gold_assert(parameters->options().has_plugins()); | |
904 | parameters->options().plugins()->set_cleanup_handler(handler); | |
905 | return LDPS_OK; | |
906 | } | |
907 | ||
908 | // Add symbols from a plugin-claimed input file. | |
909 | ||
910 | static enum ld_plugin_status | |
911 | add_symbols(void* handle, int nsyms, const ld_plugin_symbol *syms) | |
912 | { | |
913 | gold_assert(parameters->options().has_plugins()); | |
914 | Pluginobj* obj = parameters->options().plugins()->make_plugin_object( | |
915 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
916 | if (obj == NULL) | |
917 | return LDPS_ERR; | |
918 | obj->store_incoming_symbols(nsyms, syms); | |
919 | return LDPS_OK; | |
920 | } | |
921 | ||
0f7c0701 CC |
922 | // Get the input file information with an open (possibly re-opened) |
923 | // file descriptor. | |
924 | ||
925 | static enum ld_plugin_status | |
926 | get_input_file(const void *handle, struct ld_plugin_input_file *file) | |
927 | { | |
928 | gold_assert(parameters->options().has_plugins()); | |
929 | unsigned int obj_index = | |
930 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
931 | return parameters->options().plugins()->get_input_file(obj_index, file); | |
932 | } | |
933 | ||
934 | // Release the input file. | |
935 | ||
936 | static enum ld_plugin_status | |
937 | release_input_file(const void *handle) | |
938 | { | |
939 | gold_assert(parameters->options().has_plugins()); | |
940 | unsigned int obj_index = | |
941 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
942 | return parameters->options().plugins()->release_input_file(obj_index); | |
943 | } | |
944 | ||
89fc3421 CC |
945 | // Get the symbol resolution info for a plugin-claimed input file. |
946 | ||
947 | static enum ld_plugin_status | |
948 | get_symbols(const void * handle, int nsyms, ld_plugin_symbol* syms) | |
949 | { | |
950 | gold_assert(parameters->options().has_plugins()); | |
951 | Pluginobj* obj = parameters->options().plugins()->object( | |
952 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
953 | if (obj == NULL) | |
954 | return LDPS_ERR; | |
955 | return obj->get_symbol_resolution_info(nsyms, syms); | |
956 | } | |
957 | ||
958 | // Add a new (real) input file generated by a plugin. | |
959 | ||
960 | static enum ld_plugin_status | |
961 | add_input_file(char *pathname) | |
962 | { | |
963 | gold_assert(parameters->options().has_plugins()); | |
e99daf92 ILT |
964 | return parameters->options().plugins()->add_input_file(pathname, false); |
965 | } | |
966 | ||
967 | // Add a new (real) library required by a plugin. | |
968 | ||
969 | static enum ld_plugin_status | |
970 | add_input_library(char *pathname) | |
971 | { | |
972 | gold_assert(parameters->options().has_plugins()); | |
973 | return parameters->options().plugins()->add_input_file(pathname, true); | |
89fc3421 CC |
974 | } |
975 | ||
976 | // Issue a diagnostic message from a plugin. | |
977 | ||
978 | static enum ld_plugin_status | |
6c52134c | 979 | message(int level, const char * format, ...) |
89fc3421 CC |
980 | { |
981 | va_list args; | |
982 | va_start(args, format); | |
983 | ||
984 | switch (level) | |
985 | { | |
986 | case LDPL_INFO: | |
987 | parameters->errors()->info(format, args); | |
988 | break; | |
989 | case LDPL_WARNING: | |
990 | parameters->errors()->warning(format, args); | |
991 | break; | |
992 | case LDPL_ERROR: | |
993 | default: | |
994 | parameters->errors()->error(format, args); | |
995 | break; | |
996 | case LDPL_FATAL: | |
997 | parameters->errors()->fatal(format, args); | |
998 | break; | |
999 | } | |
1000 | ||
1001 | va_end(args); | |
1002 | return LDPS_OK; | |
1003 | } | |
1004 | ||
1005 | #endif // ENABLE_PLUGINS | |
1006 | ||
1007 | // Allocate a Pluginobj object of the appropriate size and endianness. | |
1008 | ||
1009 | static Pluginobj* | |
0f7c0701 | 1010 | make_sized_plugin_object(Input_file* input_file, off_t offset, off_t filesize) |
89fc3421 | 1011 | { |
89fc3421 CC |
1012 | Pluginobj* obj = NULL; |
1013 | ||
029ba973 ILT |
1014 | parameters_force_valid_target(); |
1015 | const Target& target(parameters->target()); | |
89fc3421 | 1016 | |
029ba973 | 1017 | if (target.get_size() == 32) |
89fc3421 | 1018 | { |
029ba973 | 1019 | if (target.is_big_endian()) |
92f03fcb | 1020 | #ifdef HAVE_TARGET_32_BIG |
89fc3421 | 1021 | obj = new Sized_pluginobj<32, true>(input_file->filename(), |
0f7c0701 | 1022 | input_file, offset, filesize); |
92f03fcb CC |
1023 | #else |
1024 | gold_error(_("%s: not configured to support " | |
1025 | "32-bit big-endian object"), | |
1026 | input_file->filename().c_str()); | |
89fc3421 | 1027 | #endif |
89fc3421 | 1028 | else |
92f03fcb | 1029 | #ifdef HAVE_TARGET_32_LITTLE |
89fc3421 | 1030 | obj = new Sized_pluginobj<32, false>(input_file->filename(), |
0f7c0701 | 1031 | input_file, offset, filesize); |
92f03fcb CC |
1032 | #else |
1033 | gold_error(_("%s: not configured to support " | |
1034 | "32-bit little-endian object"), | |
1035 | input_file->filename().c_str()); | |
89fc3421 CC |
1036 | #endif |
1037 | } | |
029ba973 | 1038 | else if (target.get_size() == 64) |
89fc3421 | 1039 | { |
029ba973 | 1040 | if (target.is_big_endian()) |
92f03fcb | 1041 | #ifdef HAVE_TARGET_64_BIG |
89fc3421 | 1042 | obj = new Sized_pluginobj<64, true>(input_file->filename(), |
0f7c0701 | 1043 | input_file, offset, filesize); |
92f03fcb CC |
1044 | #else |
1045 | gold_error(_("%s: not configured to support " | |
1046 | "64-bit big-endian object"), | |
1047 | input_file->filename().c_str()); | |
89fc3421 | 1048 | #endif |
89fc3421 | 1049 | else |
92f03fcb | 1050 | #ifdef HAVE_TARGET_64_LITTLE |
89fc3421 | 1051 | obj = new Sized_pluginobj<64, false>(input_file->filename(), |
0f7c0701 | 1052 | input_file, offset, filesize); |
92f03fcb CC |
1053 | #else |
1054 | gold_error(_("%s: not configured to support " | |
1055 | "64-bit little-endian object"), | |
1056 | input_file->filename().c_str()); | |
89fc3421 CC |
1057 | #endif |
1058 | } | |
1059 | ||
1060 | gold_assert(obj != NULL); | |
89fc3421 CC |
1061 | return obj; |
1062 | } | |
1063 | ||
1064 | } // End namespace gold. |