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6d03d481 | 1 | // plugin.cc -- plugin manager for gold -*- C++ -*- |
89fc3421 | 2 | |
dde3f402 | 3 | // Copyright 2008, 2009, 2010 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. | |
3537c84b | 130 | const int tv_fixed_size = 15; |
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 | ||
3537c84b RÁE |
157 | ++i; |
158 | tv[i].tv_tag = LDPT_OUTPUT_NAME; | |
159 | tv[i].tv_u.tv_string = parameters->options().output(); | |
160 | ||
4674ecfc | 161 | for (unsigned int j = 0; j < this->args_.size(); ++j) |
89fc3421 CC |
162 | { |
163 | ++i; | |
164 | tv[i].tv_tag = LDPT_OPTION; | |
4674ecfc | 165 | tv[i].tv_u.tv_string = this->args_[j].c_str(); |
89fc3421 CC |
166 | } |
167 | ||
168 | ++i; | |
169 | tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK; | |
170 | tv[i].tv_u.tv_register_claim_file = register_claim_file; | |
171 | ||
172 | ++i; | |
173 | tv[i].tv_tag = LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK; | |
174 | tv[i].tv_u.tv_register_all_symbols_read = register_all_symbols_read; | |
175 | ||
176 | ++i; | |
177 | tv[i].tv_tag = LDPT_REGISTER_CLEANUP_HOOK; | |
178 | tv[i].tv_u.tv_register_cleanup = register_cleanup; | |
179 | ||
180 | ++i; | |
181 | tv[i].tv_tag = LDPT_ADD_SYMBOLS; | |
182 | tv[i].tv_u.tv_add_symbols = add_symbols; | |
183 | ||
0f7c0701 CC |
184 | ++i; |
185 | tv[i].tv_tag = LDPT_GET_INPUT_FILE; | |
186 | tv[i].tv_u.tv_get_input_file = get_input_file; | |
187 | ||
188 | ++i; | |
189 | tv[i].tv_tag = LDPT_RELEASE_INPUT_FILE; | |
190 | tv[i].tv_u.tv_release_input_file = release_input_file; | |
191 | ||
89fc3421 CC |
192 | ++i; |
193 | tv[i].tv_tag = LDPT_GET_SYMBOLS; | |
194 | tv[i].tv_u.tv_get_symbols = get_symbols; | |
195 | ||
196 | ++i; | |
197 | tv[i].tv_tag = LDPT_ADD_INPUT_FILE; | |
198 | tv[i].tv_u.tv_add_input_file = add_input_file; | |
199 | ||
e99daf92 ILT |
200 | ++i; |
201 | tv[i].tv_tag = LDPT_ADD_INPUT_LIBRARY; | |
202 | tv[i].tv_u.tv_add_input_library = add_input_library; | |
203 | ||
89fc3421 CC |
204 | ++i; |
205 | tv[i].tv_tag = LDPT_NULL; | |
206 | tv[i].tv_u.tv_val = 0; | |
207 | ||
208 | gold_assert(i == tv_size - 1); | |
209 | ||
210 | // Call the onload entry point. | |
211 | (*onload)(tv); | |
212 | ||
6c52134c | 213 | delete[] tv; |
89fc3421 CC |
214 | #endif // ENABLE_PLUGINS |
215 | } | |
216 | ||
217 | // Call the plugin claim-file handler. | |
218 | ||
219 | inline bool | |
220 | Plugin::claim_file(struct ld_plugin_input_file *plugin_input_file) | |
221 | { | |
222 | int claimed = 0; | |
223 | ||
224 | if (this->claim_file_handler_ != NULL) | |
225 | { | |
226 | (*this->claim_file_handler_)(plugin_input_file, &claimed); | |
227 | if (claimed) | |
228 | return true; | |
229 | } | |
230 | return false; | |
231 | } | |
232 | ||
233 | // Call the all-symbols-read handler. | |
234 | ||
235 | inline void | |
236 | Plugin::all_symbols_read() | |
237 | { | |
238 | if (this->all_symbols_read_handler_ != NULL) | |
239 | (*this->all_symbols_read_handler_)(); | |
240 | } | |
241 | ||
242 | // Call the cleanup handler. | |
243 | ||
244 | inline void | |
245 | Plugin::cleanup() | |
246 | { | |
40f36857 CC |
247 | if (this->cleanup_handler_ != NULL && !this->cleanup_done_) |
248 | { | |
249 | // Set this flag before calling to prevent a recursive plunge | |
250 | // in the event that a plugin's cleanup handler issues a | |
251 | // fatal error. | |
252 | this->cleanup_done_ = true; | |
253 | (*this->cleanup_handler_)(); | |
254 | } | |
89fc3421 CC |
255 | } |
256 | ||
257 | // Plugin_manager methods. | |
258 | ||
259 | Plugin_manager::~Plugin_manager() | |
260 | { | |
261 | for (Plugin_list::iterator p = this->plugins_.begin(); | |
262 | p != this->plugins_.end(); | |
263 | ++p) | |
264 | delete *p; | |
265 | this->plugins_.clear(); | |
266 | for (Object_list::iterator obj = this->objects_.begin(); | |
267 | obj != this->objects_.end(); | |
268 | ++obj) | |
269 | delete *obj; | |
270 | this->objects_.clear(); | |
271 | } | |
272 | ||
273 | // Load all plugin libraries. | |
274 | ||
275 | void | |
276 | Plugin_manager::load_plugins() | |
277 | { | |
278 | for (this->current_ = this->plugins_.begin(); | |
279 | this->current_ != this->plugins_.end(); | |
280 | ++this->current_) | |
281 | (*this->current_)->load(); | |
282 | } | |
283 | ||
284 | // Call the plugin claim-file handlers in turn to see if any claim the file. | |
285 | ||
286 | Pluginobj* | |
287 | Plugin_manager::claim_file(Input_file* input_file, off_t offset, | |
288 | off_t filesize) | |
289 | { | |
290 | if (this->in_replacement_phase_) | |
291 | return NULL; | |
292 | ||
293 | unsigned int handle = this->objects_.size(); | |
294 | this->input_file_ = input_file; | |
295 | this->plugin_input_file_.name = input_file->filename().c_str(); | |
296 | this->plugin_input_file_.fd = input_file->file().descriptor(); | |
297 | this->plugin_input_file_.offset = offset; | |
298 | this->plugin_input_file_.filesize = filesize; | |
299 | this->plugin_input_file_.handle = reinterpret_cast<void*>(handle); | |
300 | ||
301 | for (this->current_ = this->plugins_.begin(); | |
302 | this->current_ != this->plugins_.end(); | |
303 | ++this->current_) | |
304 | { | |
305 | if ((*this->current_)->claim_file(&this->plugin_input_file_)) | |
306 | { | |
abc8dcba CC |
307 | if (this->objects_.size() > handle) |
308 | return this->objects_[handle]; | |
309 | ||
310 | // If the plugin claimed the file but did not call the | |
311 | // add_symbols callback, we need to create the Pluginobj now. | |
312 | Pluginobj* obj = this->make_plugin_object(handle); | |
313 | return obj; | |
89fc3421 CC |
314 | } |
315 | } | |
316 | ||
317 | return NULL; | |
318 | } | |
319 | ||
320 | // Call the all-symbols-read handlers. | |
321 | ||
322 | void | |
0f7c0701 | 323 | Plugin_manager::all_symbols_read(Workqueue* workqueue, Task* task, |
89fc3421 | 324 | Input_objects* input_objects, |
2ea97941 | 325 | Symbol_table* symtab, Layout* layout, |
89fc3421 CC |
326 | Dirsearch* dirpath, Mapfile* mapfile, |
327 | Task_token** last_blocker) | |
328 | { | |
329 | this->in_replacement_phase_ = true; | |
330 | this->workqueue_ = workqueue; | |
0f7c0701 | 331 | this->task_ = task; |
89fc3421 CC |
332 | this->input_objects_ = input_objects; |
333 | this->symtab_ = symtab; | |
2ea97941 | 334 | this->layout_ = layout; |
89fc3421 CC |
335 | this->dirpath_ = dirpath; |
336 | this->mapfile_ = mapfile; | |
337 | this->this_blocker_ = NULL; | |
338 | ||
339 | for (this->current_ = this->plugins_.begin(); | |
340 | this->current_ != this->plugins_.end(); | |
341 | ++this->current_) | |
342 | (*this->current_)->all_symbols_read(); | |
343 | ||
344 | *last_blocker = this->this_blocker_; | |
345 | } | |
346 | ||
483620e8 | 347 | // Layout deferred objects. |
89fc3421 CC |
348 | |
349 | void | |
483620e8 | 350 | Plugin_manager::layout_deferred_objects() |
89fc3421 | 351 | { |
5995b570 CC |
352 | Deferred_layout_list::iterator obj; |
353 | ||
354 | for (obj = this->deferred_layout_objects_.begin(); | |
355 | obj != this->deferred_layout_objects_.end(); | |
356 | ++obj) | |
357 | (*obj)->layout_deferred_sections(this->layout_); | |
483620e8 CC |
358 | } |
359 | ||
360 | // Call the cleanup handlers. | |
5995b570 | 361 | |
483620e8 CC |
362 | void |
363 | Plugin_manager::cleanup() | |
364 | { | |
89fc3421 CC |
365 | for (this->current_ = this->plugins_.begin(); |
366 | this->current_ != this->plugins_.end(); | |
367 | ++this->current_) | |
368 | (*this->current_)->cleanup(); | |
369 | } | |
370 | ||
371 | // Make a new Pluginobj object. This is called when the plugin calls | |
372 | // the add_symbols API. | |
373 | ||
374 | Pluginobj* | |
375 | Plugin_manager::make_plugin_object(unsigned int handle) | |
376 | { | |
377 | // Make sure we aren't asked to make an object for the same handle twice. | |
378 | if (this->objects_.size() != handle) | |
379 | return NULL; | |
380 | ||
381 | Pluginobj* obj = make_sized_plugin_object(this->input_file_, | |
0f7c0701 CC |
382 | this->plugin_input_file_.offset, |
383 | this->plugin_input_file_.filesize); | |
89fc3421 CC |
384 | this->objects_.push_back(obj); |
385 | return obj; | |
386 | } | |
387 | ||
0f7c0701 CC |
388 | // Get the input file information with an open (possibly re-opened) |
389 | // file descriptor. | |
390 | ||
391 | ld_plugin_status | |
392 | Plugin_manager::get_input_file(unsigned int handle, | |
393 | struct ld_plugin_input_file *file) | |
394 | { | |
395 | Pluginobj* obj = this->object(handle); | |
396 | if (obj == NULL) | |
397 | return LDPS_BAD_HANDLE; | |
398 | ||
399 | obj->lock(this->task_); | |
400 | file->name = obj->filename().c_str(); | |
401 | file->fd = obj->descriptor(); | |
402 | file->offset = obj->offset(); | |
403 | file->filesize = obj->filesize(); | |
404 | file->handle = reinterpret_cast<void*>(handle); | |
405 | return LDPS_OK; | |
406 | } | |
407 | ||
408 | // Release the input file. | |
409 | ||
410 | ld_plugin_status | |
411 | Plugin_manager::release_input_file(unsigned int handle) | |
412 | { | |
413 | Pluginobj* obj = this->object(handle); | |
414 | if (obj == NULL) | |
415 | return LDPS_BAD_HANDLE; | |
416 | ||
417 | obj->unlock(this->task_); | |
418 | return LDPS_OK; | |
419 | } | |
420 | ||
89fc3421 CC |
421 | // Add a new input file. |
422 | ||
423 | ld_plugin_status | |
e99daf92 | 424 | Plugin_manager::add_input_file(char *pathname, bool is_lib) |
89fc3421 | 425 | { |
ae3b5189 CD |
426 | Input_file_argument file(pathname, |
427 | (is_lib | |
428 | ? Input_file_argument::INPUT_FILE_TYPE_LIBRARY | |
429 | : Input_file_argument::INPUT_FILE_TYPE_FILE), | |
430 | "", false, this->options_); | |
89fc3421 CC |
431 | Input_argument* input_argument = new Input_argument(file); |
432 | Task_token* next_blocker = new Task_token(true); | |
433 | next_blocker->add_blocker(); | |
072fe7ce | 434 | if (this->layout_->incremental_inputs()) |
40f36857 CC |
435 | gold_error(_("input files added by plug-ins in --incremental mode not " |
436 | "supported yet")); | |
f1ed28fb | 437 | this->workqueue_->queue_soon(new Read_symbols(this->input_objects_, |
89fc3421 CC |
438 | this->symtab_, |
439 | this->layout_, | |
440 | this->dirpath_, | |
15f8229b | 441 | 0, |
89fc3421 CC |
442 | this->mapfile_, |
443 | input_argument, | |
444 | NULL, | |
b0193076 | 445 | NULL, |
89fc3421 CC |
446 | this->this_blocker_, |
447 | next_blocker)); | |
448 | this->this_blocker_ = next_blocker; | |
449 | return LDPS_OK; | |
450 | } | |
451 | ||
452 | // Class Pluginobj. | |
453 | ||
2ea97941 ILT |
454 | Pluginobj::Pluginobj(const std::string& name, Input_file* input_file, |
455 | off_t offset, off_t filesize) | |
456 | : Object(name, input_file, false, offset), | |
457 | nsyms_(0), syms_(NULL), symbols_(), filesize_(filesize), comdat_map_() | |
89fc3421 CC |
458 | { |
459 | } | |
460 | ||
d66a9eb3 CC |
461 | // Return TRUE if a defined symbol might be reachable from outside the |
462 | // universe of claimed objects. | |
463 | ||
464 | static inline bool | |
465 | is_visible_from_outside(Symbol* lsym) | |
466 | { | |
467 | if (lsym->in_real_elf()) | |
468 | return true; | |
469 | if (parameters->options().relocatable()) | |
470 | return true; | |
471 | if (parameters->options().export_dynamic() || parameters->options().shared()) | |
472 | return lsym->is_externally_visible(); | |
473 | return false; | |
474 | } | |
475 | ||
89fc3421 CC |
476 | // Get symbol resolution info. |
477 | ||
478 | ld_plugin_status | |
479 | Pluginobj::get_symbol_resolution_info(int nsyms, ld_plugin_symbol* syms) const | |
480 | { | |
abc8dcba | 481 | if (nsyms > this->nsyms_) |
89fc3421 | 482 | return LDPS_NO_SYMS; |
b0193076 RÁE |
483 | |
484 | if (static_cast<size_t>(nsyms) > this->symbols_.size()) | |
485 | { | |
486 | // We never decided to include this object. We mark all symbols as | |
487 | // preempted. | |
488 | gold_assert (this->symbols_.size() == 0); | |
489 | for (int i = 0; i < nsyms; i++) | |
490 | syms[i].resolution = LDPR_PREEMPTED_REG; | |
491 | return LDPS_OK; | |
492 | } | |
493 | ||
89fc3421 CC |
494 | for (int i = 0; i < nsyms; i++) |
495 | { | |
496 | ld_plugin_symbol* isym = &syms[i]; | |
497 | Symbol* lsym = this->symbols_[i]; | |
498 | ld_plugin_symbol_resolution res = LDPR_UNKNOWN; | |
499 | ||
500 | if (lsym->is_undefined()) | |
501 | // The symbol remains undefined. | |
502 | res = LDPR_UNDEF; | |
503 | else if (isym->def == LDPK_UNDEF | |
504 | || isym->def == LDPK_WEAKUNDEF | |
505 | || isym->def == LDPK_COMMON) | |
506 | { | |
507 | // The original symbol was undefined or common. | |
508 | if (lsym->source() != Symbol::FROM_OBJECT) | |
509 | res = LDPR_RESOLVED_EXEC; | |
be234d88 CC |
510 | else if (lsym->object()->pluginobj() == this) |
511 | res = (is_visible_from_outside(lsym) | |
512 | ? LDPR_PREVAILING_DEF | |
513 | : LDPR_PREVAILING_DEF_IRONLY); | |
89fc3421 CC |
514 | else if (lsym->object()->pluginobj() != NULL) |
515 | res = LDPR_RESOLVED_IR; | |
516 | else if (lsym->object()->is_dynamic()) | |
517 | res = LDPR_RESOLVED_DYN; | |
518 | else | |
519 | res = LDPR_RESOLVED_EXEC; | |
520 | } | |
521 | else | |
522 | { | |
523 | // The original symbol was a definition. | |
524 | if (lsym->source() != Symbol::FROM_OBJECT) | |
525 | res = LDPR_PREEMPTED_REG; | |
526 | else if (lsym->object() == static_cast<const Object*>(this)) | |
d66a9eb3 | 527 | res = (is_visible_from_outside(lsym) |
89fc3421 CC |
528 | ? LDPR_PREVAILING_DEF |
529 | : LDPR_PREVAILING_DEF_IRONLY); | |
530 | else | |
531 | res = (lsym->object()->pluginobj() != NULL | |
532 | ? LDPR_PREEMPTED_IR | |
533 | : LDPR_PREEMPTED_REG); | |
534 | } | |
535 | isym->resolution = res; | |
536 | } | |
537 | return LDPS_OK; | |
538 | } | |
539 | ||
540 | // Return TRUE if the comdat group with key COMDAT_KEY from this object | |
541 | // should be kept. | |
542 | ||
543 | bool | |
2ea97941 | 544 | Pluginobj::include_comdat_group(std::string comdat_key, Layout* layout) |
89fc3421 CC |
545 | { |
546 | std::pair<Comdat_map::iterator, bool> ins = | |
547 | this->comdat_map_.insert(std::make_pair(comdat_key, false)); | |
548 | ||
549 | // If this is the first time we've seen this comdat key, ask the | |
550 | // layout object whether it should be included. | |
551 | if (ins.second) | |
2ea97941 ILT |
552 | ins.first->second = layout->find_or_add_kept_section(comdat_key, |
553 | NULL, 0, true, | |
554 | true, NULL); | |
89fc3421 CC |
555 | |
556 | return ins.first->second; | |
557 | } | |
558 | ||
559 | // Class Sized_pluginobj. | |
560 | ||
561 | template<int size, bool big_endian> | |
562 | Sized_pluginobj<size, big_endian>::Sized_pluginobj( | |
2ea97941 ILT |
563 | const std::string& name, |
564 | Input_file* input_file, | |
565 | off_t offset, | |
566 | off_t filesize) | |
567 | : Pluginobj(name, input_file, offset, filesize) | |
89fc3421 CC |
568 | { |
569 | } | |
570 | ||
571 | // Read the symbols. Not used for plugin objects. | |
572 | ||
573 | template<int size, bool big_endian> | |
574 | void | |
575 | Sized_pluginobj<size, big_endian>::do_read_symbols(Read_symbols_data*) | |
576 | { | |
577 | gold_unreachable(); | |
578 | } | |
579 | ||
580 | // Lay out the input sections. Not used for plugin objects. | |
581 | ||
582 | template<int size, bool big_endian> | |
583 | void | |
584 | Sized_pluginobj<size, big_endian>::do_layout(Symbol_table*, Layout*, | |
585 | Read_symbols_data*) | |
586 | { | |
587 | gold_unreachable(); | |
588 | } | |
589 | ||
590 | // Add the symbols to the symbol table. | |
591 | ||
89fc3421 CC |
592 | template<int size, bool big_endian> |
593 | void | |
594 | Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table* symtab, | |
f488e4b0 | 595 | Read_symbols_data*, |
2ea97941 | 596 | Layout* layout) |
89fc3421 CC |
597 | { |
598 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
599 | unsigned char symbuf[sym_size]; | |
600 | elfcpp::Sym<size, big_endian> sym(symbuf); | |
601 | elfcpp::Sym_write<size, big_endian> osym(symbuf); | |
602 | ||
603 | typedef typename elfcpp::Elf_types<size>::Elf_WXword Elf_size_type; | |
604 | ||
605 | this->symbols_.resize(this->nsyms_); | |
606 | ||
607 | for (int i = 0; i < this->nsyms_; ++i) | |
608 | { | |
609 | const struct ld_plugin_symbol *isym = &this->syms_[i]; | |
2ea97941 | 610 | const char* name = isym->name; |
89fc3421 CC |
611 | const char* ver = isym->version; |
612 | elfcpp::Elf_Half shndx; | |
613 | elfcpp::STB bind; | |
614 | elfcpp::STV vis; | |
615 | ||
2ea97941 ILT |
616 | if (name != NULL && name[0] == '\0') |
617 | name = NULL; | |
89fc3421 CC |
618 | if (ver != NULL && ver[0] == '\0') |
619 | ver = NULL; | |
620 | ||
621 | switch (isym->def) | |
622 | { | |
623 | case LDPK_WEAKDEF: | |
624 | case LDPK_WEAKUNDEF: | |
625 | bind = elfcpp::STB_WEAK; | |
626 | break; | |
627 | case LDPK_DEF: | |
628 | case LDPK_UNDEF: | |
629 | case LDPK_COMMON: | |
630 | default: | |
631 | bind = elfcpp::STB_GLOBAL; | |
632 | break; | |
633 | } | |
634 | ||
635 | switch (isym->def) | |
636 | { | |
637 | case LDPK_DEF: | |
638 | case LDPK_WEAKDEF: | |
639 | shndx = elfcpp::SHN_ABS; | |
640 | break; | |
641 | case LDPK_COMMON: | |
642 | shndx = elfcpp::SHN_COMMON; | |
643 | break; | |
644 | case LDPK_UNDEF: | |
645 | case LDPK_WEAKUNDEF: | |
646 | default: | |
647 | shndx = elfcpp::SHN_UNDEF; | |
648 | break; | |
649 | } | |
650 | ||
651 | switch (isym->visibility) | |
652 | { | |
653 | case LDPV_PROTECTED: | |
105b6afd | 654 | vis = elfcpp::STV_PROTECTED; |
89fc3421 CC |
655 | break; |
656 | case LDPV_INTERNAL: | |
105b6afd | 657 | vis = elfcpp::STV_INTERNAL; |
89fc3421 CC |
658 | break; |
659 | case LDPV_HIDDEN: | |
105b6afd | 660 | vis = elfcpp::STV_HIDDEN; |
89fc3421 CC |
661 | break; |
662 | case LDPV_DEFAULT: | |
663 | default: | |
664 | vis = elfcpp::STV_DEFAULT; | |
665 | break; | |
666 | } | |
667 | ||
668 | if (isym->comdat_key != NULL | |
669 | && isym->comdat_key[0] != '\0' | |
2ea97941 | 670 | && !this->include_comdat_group(isym->comdat_key, layout)) |
89fc3421 CC |
671 | shndx = elfcpp::SHN_UNDEF; |
672 | ||
673 | osym.put_st_name(0); | |
674 | osym.put_st_value(0); | |
675 | osym.put_st_size(static_cast<Elf_size_type>(isym->size)); | |
676 | osym.put_st_info(bind, elfcpp::STT_NOTYPE); | |
677 | osym.put_st_other(vis, 0); | |
678 | osym.put_st_shndx(shndx); | |
679 | ||
680 | this->symbols_[i] = | |
2ea97941 | 681 | symtab->add_from_pluginobj<size, big_endian>(this, name, ver, &sym); |
89fc3421 CC |
682 | } |
683 | } | |
684 | ||
b0193076 RÁE |
685 | template<int size, bool big_endian> |
686 | Archive::Should_include | |
687 | Sized_pluginobj<size, big_endian>::do_should_include_member( | |
688 | Symbol_table* symtab, Read_symbols_data*, std::string* why) | |
689 | { | |
690 | char* tmpbuf = NULL; | |
691 | size_t tmpbuflen = 0; | |
692 | ||
693 | for (int i = 0; i < this->nsyms_; ++i) { | |
694 | const struct ld_plugin_symbol& sym = this->syms_[i]; | |
695 | const char* name = sym.name; | |
696 | Symbol* symbol; | |
697 | Archive::Should_include t = Archive::should_include_member(symtab, name, | |
698 | &symbol, why, | |
699 | &tmpbuf, | |
700 | &tmpbuflen); | |
701 | if (t == Archive::SHOULD_INCLUDE_YES) | |
702 | { | |
703 | if (tmpbuf != NULL) | |
704 | free(tmpbuf); | |
705 | return t; | |
706 | } | |
707 | } | |
708 | if (tmpbuf != NULL) | |
709 | free(tmpbuf); | |
710 | return Archive::SHOULD_INCLUDE_UNKNOWN; | |
711 | } | |
712 | ||
89fc3421 CC |
713 | // Get the size of a section. Not used for plugin objects. |
714 | ||
715 | template<int size, bool big_endian> | |
716 | uint64_t | |
717 | Sized_pluginobj<size, big_endian>::do_section_size(unsigned int) | |
718 | { | |
719 | gold_unreachable(); | |
720 | return 0; | |
721 | } | |
722 | ||
723 | // Get the name of a section. Not used for plugin objects. | |
724 | ||
725 | template<int size, bool big_endian> | |
726 | std::string | |
727 | Sized_pluginobj<size, big_endian>::do_section_name(unsigned int) | |
728 | { | |
729 | gold_unreachable(); | |
730 | return std::string(); | |
731 | } | |
732 | ||
733 | // Return a view of the contents of a section. Not used for plugin objects. | |
734 | ||
735 | template<int size, bool big_endian> | |
736 | Object::Location | |
737 | Sized_pluginobj<size, big_endian>::do_section_contents(unsigned int) | |
738 | { | |
739 | Location loc(0, 0); | |
740 | ||
741 | gold_unreachable(); | |
742 | return loc; | |
743 | } | |
744 | ||
745 | // Return section flags. Not used for plugin objects. | |
746 | ||
747 | template<int size, bool big_endian> | |
748 | uint64_t | |
749 | Sized_pluginobj<size, big_endian>::do_section_flags(unsigned int) | |
750 | { | |
751 | gold_unreachable(); | |
752 | return 0; | |
753 | } | |
754 | ||
ef15dade ST |
755 | // Return section entsize. Not used for plugin objects. |
756 | ||
757 | template<int size, bool big_endian> | |
758 | uint64_t | |
759 | Sized_pluginobj<size, big_endian>::do_section_entsize(unsigned int) | |
760 | { | |
761 | gold_unreachable(); | |
762 | return 0; | |
763 | } | |
764 | ||
89fc3421 CC |
765 | // Return section address. Not used for plugin objects. |
766 | ||
767 | template<int size, bool big_endian> | |
768 | uint64_t | |
769 | Sized_pluginobj<size, big_endian>::do_section_address(unsigned int) | |
770 | { | |
771 | gold_unreachable(); | |
772 | return 0; | |
773 | } | |
774 | ||
775 | // Return section type. Not used for plugin objects. | |
776 | ||
777 | template<int size, bool big_endian> | |
778 | unsigned int | |
779 | Sized_pluginobj<size, big_endian>::do_section_type(unsigned int) | |
780 | { | |
781 | gold_unreachable(); | |
782 | return 0; | |
783 | } | |
784 | ||
785 | // Return the section link field. Not used for plugin objects. | |
786 | ||
787 | template<int size, bool big_endian> | |
788 | unsigned int | |
789 | Sized_pluginobj<size, big_endian>::do_section_link(unsigned int) | |
790 | { | |
791 | gold_unreachable(); | |
792 | return 0; | |
793 | } | |
794 | ||
795 | // Return the section link field. Not used for plugin objects. | |
796 | ||
797 | template<int size, bool big_endian> | |
798 | unsigned int | |
799 | Sized_pluginobj<size, big_endian>::do_section_info(unsigned int) | |
800 | { | |
801 | gold_unreachable(); | |
802 | return 0; | |
803 | } | |
804 | ||
805 | // Return the section alignment. Not used for plugin objects. | |
806 | ||
807 | template<int size, bool big_endian> | |
808 | uint64_t | |
809 | Sized_pluginobj<size, big_endian>::do_section_addralign(unsigned int) | |
810 | { | |
811 | gold_unreachable(); | |
812 | return 0; | |
813 | } | |
814 | ||
815 | // Return the Xindex structure to use. Not used for plugin objects. | |
816 | ||
817 | template<int size, bool big_endian> | |
818 | Xindex* | |
819 | Sized_pluginobj<size, big_endian>::do_initialize_xindex() | |
820 | { | |
821 | gold_unreachable(); | |
822 | return NULL; | |
823 | } | |
824 | ||
825 | // Get symbol counts. Not used for plugin objects. | |
826 | ||
827 | template<int size, bool big_endian> | |
828 | void | |
829 | Sized_pluginobj<size, big_endian>::do_get_global_symbol_counts(const Symbol_table*, | |
830 | size_t*, size_t*) const | |
831 | { | |
832 | gold_unreachable(); | |
833 | } | |
834 | ||
dde3f402 ILT |
835 | // Get symbols. Not used for plugin objects. |
836 | ||
837 | template<int size, bool big_endian> | |
838 | const Object::Symbols* | |
839 | Sized_pluginobj<size, big_endian>::do_get_global_symbols() const | |
840 | { | |
841 | gold_unreachable(); | |
842 | } | |
843 | ||
5995b570 | 844 | // Class Plugin_finish. This task runs after all replacement files have |
6d03d481 | 845 | // been added. It calls each plugin's cleanup handler. |
89fc3421 | 846 | |
5995b570 | 847 | class Plugin_finish : public Task |
89fc3421 CC |
848 | { |
849 | public: | |
5995b570 | 850 | Plugin_finish(Task_token* this_blocker, Task_token* next_blocker) |
89fc3421 CC |
851 | : this_blocker_(this_blocker), next_blocker_(next_blocker) |
852 | { } | |
853 | ||
5995b570 | 854 | ~Plugin_finish() |
89fc3421 CC |
855 | { |
856 | if (this->this_blocker_ != NULL) | |
857 | delete this->this_blocker_; | |
858 | } | |
859 | ||
860 | Task_token* | |
861 | is_runnable() | |
862 | { | |
863 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
864 | return this->this_blocker_; | |
865 | return NULL; | |
866 | } | |
867 | ||
868 | void | |
869 | locks(Task_locker* tl) | |
870 | { tl->add(this, this->next_blocker_); } | |
871 | ||
872 | void | |
873 | run(Workqueue*) | |
483620e8 CC |
874 | { |
875 | Plugin_manager* plugins = parameters->options().plugins(); | |
876 | gold_assert(plugins != NULL); | |
483620e8 CC |
877 | plugins->cleanup(); |
878 | } | |
89fc3421 CC |
879 | |
880 | std::string | |
881 | get_name() const | |
5995b570 | 882 | { return "Plugin_finish"; } |
89fc3421 CC |
883 | |
884 | private: | |
885 | Task_token* this_blocker_; | |
886 | Task_token* next_blocker_; | |
887 | }; | |
888 | ||
889 | // Class Plugin_hook. | |
890 | ||
891 | Plugin_hook::~Plugin_hook() | |
892 | { | |
893 | } | |
894 | ||
895 | // Return whether a Plugin_hook task is runnable. | |
896 | ||
897 | Task_token* | |
898 | Plugin_hook::is_runnable() | |
899 | { | |
900 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
901 | return this->this_blocker_; | |
902 | return NULL; | |
903 | } | |
904 | ||
905 | // Return a Task_locker for a Plugin_hook task. We don't need any | |
906 | // locks here. | |
907 | ||
908 | void | |
909 | Plugin_hook::locks(Task_locker*) | |
910 | { | |
911 | } | |
912 | ||
89fc3421 CC |
913 | // Run the "all symbols read" plugin hook. |
914 | ||
915 | void | |
5995b570 | 916 | Plugin_hook::run(Workqueue* workqueue) |
89fc3421 CC |
917 | { |
918 | gold_assert(this->options_.has_plugins()); | |
91ff43fe RÁE |
919 | Symbol* start_sym; |
920 | if (parameters->options().entry()) | |
921 | start_sym = this->symtab_->lookup(parameters->options().entry()); | |
922 | else | |
923 | start_sym = this->symtab_->lookup("_start"); | |
924 | if (start_sym != NULL) | |
925 | start_sym->set_in_real_elf(); | |
926 | ||
89fc3421 | 927 | this->options_.plugins()->all_symbols_read(workqueue, |
0f7c0701 | 928 | this, |
89fc3421 CC |
929 | this->input_objects_, |
930 | this->symtab_, | |
931 | this->layout_, | |
932 | this->dirpath_, | |
933 | this->mapfile_, | |
934 | &this->this_blocker_); | |
5995b570 CC |
935 | workqueue->queue_soon(new Plugin_finish(this->this_blocker_, |
936 | this->next_blocker_)); | |
89fc3421 CC |
937 | } |
938 | ||
939 | // The C interface routines called by the plugins. | |
940 | ||
941 | #ifdef ENABLE_PLUGINS | |
942 | ||
943 | // Register a claim-file handler. | |
944 | ||
945 | static enum ld_plugin_status | |
946 | register_claim_file(ld_plugin_claim_file_handler handler) | |
947 | { | |
948 | gold_assert(parameters->options().has_plugins()); | |
949 | parameters->options().plugins()->set_claim_file_handler(handler); | |
950 | return LDPS_OK; | |
951 | } | |
952 | ||
953 | // Register an all-symbols-read handler. | |
954 | ||
955 | static enum ld_plugin_status | |
956 | register_all_symbols_read(ld_plugin_all_symbols_read_handler handler) | |
957 | { | |
958 | gold_assert(parameters->options().has_plugins()); | |
959 | parameters->options().plugins()->set_all_symbols_read_handler(handler); | |
960 | return LDPS_OK; | |
961 | } | |
962 | ||
963 | // Register a cleanup handler. | |
964 | ||
965 | static enum ld_plugin_status | |
966 | register_cleanup(ld_plugin_cleanup_handler handler) | |
967 | { | |
968 | gold_assert(parameters->options().has_plugins()); | |
969 | parameters->options().plugins()->set_cleanup_handler(handler); | |
970 | return LDPS_OK; | |
971 | } | |
972 | ||
973 | // Add symbols from a plugin-claimed input file. | |
974 | ||
975 | static enum ld_plugin_status | |
976 | add_symbols(void* handle, int nsyms, const ld_plugin_symbol *syms) | |
977 | { | |
978 | gold_assert(parameters->options().has_plugins()); | |
979 | Pluginobj* obj = parameters->options().plugins()->make_plugin_object( | |
980 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
981 | if (obj == NULL) | |
982 | return LDPS_ERR; | |
983 | obj->store_incoming_symbols(nsyms, syms); | |
984 | return LDPS_OK; | |
985 | } | |
986 | ||
0f7c0701 CC |
987 | // Get the input file information with an open (possibly re-opened) |
988 | // file descriptor. | |
989 | ||
990 | static enum ld_plugin_status | |
991 | get_input_file(const void *handle, struct ld_plugin_input_file *file) | |
992 | { | |
993 | gold_assert(parameters->options().has_plugins()); | |
994 | unsigned int obj_index = | |
995 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
996 | return parameters->options().plugins()->get_input_file(obj_index, file); | |
997 | } | |
998 | ||
999 | // Release the input file. | |
1000 | ||
1001 | static enum ld_plugin_status | |
1002 | release_input_file(const void *handle) | |
1003 | { | |
1004 | gold_assert(parameters->options().has_plugins()); | |
1005 | unsigned int obj_index = | |
1006 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
1007 | return parameters->options().plugins()->release_input_file(obj_index); | |
1008 | } | |
1009 | ||
89fc3421 CC |
1010 | // Get the symbol resolution info for a plugin-claimed input file. |
1011 | ||
1012 | static enum ld_plugin_status | |
1013 | get_symbols(const void * handle, int nsyms, ld_plugin_symbol* syms) | |
1014 | { | |
1015 | gold_assert(parameters->options().has_plugins()); | |
1016 | Pluginobj* obj = parameters->options().plugins()->object( | |
1017 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
1018 | if (obj == NULL) | |
1019 | return LDPS_ERR; | |
1020 | return obj->get_symbol_resolution_info(nsyms, syms); | |
1021 | } | |
1022 | ||
1023 | // Add a new (real) input file generated by a plugin. | |
1024 | ||
1025 | static enum ld_plugin_status | |
1026 | add_input_file(char *pathname) | |
1027 | { | |
1028 | gold_assert(parameters->options().has_plugins()); | |
e99daf92 ILT |
1029 | return parameters->options().plugins()->add_input_file(pathname, false); |
1030 | } | |
1031 | ||
1032 | // Add a new (real) library required by a plugin. | |
1033 | ||
1034 | static enum ld_plugin_status | |
1035 | add_input_library(char *pathname) | |
1036 | { | |
1037 | gold_assert(parameters->options().has_plugins()); | |
1038 | return parameters->options().plugins()->add_input_file(pathname, true); | |
89fc3421 CC |
1039 | } |
1040 | ||
1041 | // Issue a diagnostic message from a plugin. | |
1042 | ||
1043 | static enum ld_plugin_status | |
6c52134c | 1044 | message(int level, const char * format, ...) |
89fc3421 CC |
1045 | { |
1046 | va_list args; | |
1047 | va_start(args, format); | |
1048 | ||
1049 | switch (level) | |
1050 | { | |
1051 | case LDPL_INFO: | |
1052 | parameters->errors()->info(format, args); | |
1053 | break; | |
1054 | case LDPL_WARNING: | |
1055 | parameters->errors()->warning(format, args); | |
1056 | break; | |
1057 | case LDPL_ERROR: | |
1058 | default: | |
1059 | parameters->errors()->error(format, args); | |
1060 | break; | |
1061 | case LDPL_FATAL: | |
1062 | parameters->errors()->fatal(format, args); | |
1063 | break; | |
1064 | } | |
1065 | ||
1066 | va_end(args); | |
1067 | return LDPS_OK; | |
1068 | } | |
1069 | ||
1070 | #endif // ENABLE_PLUGINS | |
1071 | ||
1072 | // Allocate a Pluginobj object of the appropriate size and endianness. | |
1073 | ||
1074 | static Pluginobj* | |
0f7c0701 | 1075 | make_sized_plugin_object(Input_file* input_file, off_t offset, off_t filesize) |
89fc3421 | 1076 | { |
89fc3421 CC |
1077 | Pluginobj* obj = NULL; |
1078 | ||
029ba973 ILT |
1079 | parameters_force_valid_target(); |
1080 | const Target& target(parameters->target()); | |
89fc3421 | 1081 | |
029ba973 | 1082 | if (target.get_size() == 32) |
89fc3421 | 1083 | { |
029ba973 | 1084 | if (target.is_big_endian()) |
92f03fcb | 1085 | #ifdef HAVE_TARGET_32_BIG |
89fc3421 | 1086 | obj = new Sized_pluginobj<32, true>(input_file->filename(), |
0f7c0701 | 1087 | input_file, offset, filesize); |
92f03fcb CC |
1088 | #else |
1089 | gold_error(_("%s: not configured to support " | |
1090 | "32-bit big-endian object"), | |
1091 | input_file->filename().c_str()); | |
89fc3421 | 1092 | #endif |
89fc3421 | 1093 | else |
92f03fcb | 1094 | #ifdef HAVE_TARGET_32_LITTLE |
89fc3421 | 1095 | obj = new Sized_pluginobj<32, false>(input_file->filename(), |
0f7c0701 | 1096 | input_file, offset, filesize); |
92f03fcb CC |
1097 | #else |
1098 | gold_error(_("%s: not configured to support " | |
1099 | "32-bit little-endian object"), | |
1100 | input_file->filename().c_str()); | |
89fc3421 CC |
1101 | #endif |
1102 | } | |
029ba973 | 1103 | else if (target.get_size() == 64) |
89fc3421 | 1104 | { |
029ba973 | 1105 | if (target.is_big_endian()) |
92f03fcb | 1106 | #ifdef HAVE_TARGET_64_BIG |
89fc3421 | 1107 | obj = new Sized_pluginobj<64, true>(input_file->filename(), |
0f7c0701 | 1108 | input_file, offset, filesize); |
92f03fcb CC |
1109 | #else |
1110 | gold_error(_("%s: not configured to support " | |
1111 | "64-bit big-endian object"), | |
1112 | input_file->filename().c_str()); | |
89fc3421 | 1113 | #endif |
89fc3421 | 1114 | else |
92f03fcb | 1115 | #ifdef HAVE_TARGET_64_LITTLE |
89fc3421 | 1116 | obj = new Sized_pluginobj<64, false>(input_file->filename(), |
0f7c0701 | 1117 | input_file, offset, filesize); |
92f03fcb CC |
1118 | #else |
1119 | gold_error(_("%s: not configured to support " | |
1120 | "64-bit little-endian object"), | |
1121 | input_file->filename().c_str()); | |
89fc3421 CC |
1122 | #endif |
1123 | } | |
1124 | ||
1125 | gold_assert(obj != NULL); | |
89fc3421 CC |
1126 | return obj; |
1127 | } | |
1128 | ||
1129 | } // End namespace gold. |