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6d03d481 | 1 | // plugin.cc -- plugin manager for gold -*- C++ -*- |
89fc3421 | 2 | |
b90efa5b | 3 | // Copyright (C) 2008-2015 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 | |
0bf402d5 | 32 | #ifdef HAVE_DLFCN_H |
89fc3421 | 33 | #include <dlfcn.h> |
0bf402d5 ILT |
34 | #elif defined (HAVE_WINDOWS_H) |
35 | #include <windows.h> | |
36 | #else | |
37 | #error Unknown how to handle dynamic-load-libraries. | |
bc06c745 | 38 | #endif |
89fc3421 | 39 | |
0bf402d5 ILT |
40 | #if !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) |
41 | ||
42 | #define RTLD_NOW 0 /* Dummy value. */ | |
43 | static void * | |
44 | dlopen(const char *file, int mode ATTRIBUTE_UNUSED) | |
45 | { | |
46 | return LoadLibrary(file); | |
47 | } | |
48 | ||
49 | static void * | |
50 | dlsym(void *handle, const char *name) | |
51 | { | |
52 | return reinterpret_cast<void *>( | |
53 | GetProcAddress(static_cast<HMODULE>(handle),name)); | |
54 | } | |
55 | ||
56 | static const char * | |
57 | dlerror(void) | |
58 | { | |
59 | return "unable to load dll"; | |
60 | } | |
61 | ||
62 | #endif /* !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) */ | |
63 | #endif /* ENABLE_PLUGINS */ | |
64 | ||
89fc3421 CC |
65 | #include "parameters.h" |
66 | #include "errors.h" | |
67 | #include "fileread.h" | |
68 | #include "layout.h" | |
69 | #include "options.h" | |
70 | #include "plugin.h" | |
71 | #include "target.h" | |
72 | #include "readsyms.h" | |
73 | #include "symtab.h" | |
20e2a8aa | 74 | #include "descriptors.h" |
89fc3421 CC |
75 | #include "elfcpp.h" |
76 | ||
77 | namespace gold | |
78 | { | |
79 | ||
80 | #ifdef ENABLE_PLUGINS | |
81 | ||
82 | // The linker's exported interfaces. | |
83 | ||
84 | extern "C" | |
85 | { | |
86 | ||
87 | static enum ld_plugin_status | |
88 | register_claim_file(ld_plugin_claim_file_handler handler); | |
89 | ||
90 | static enum ld_plugin_status | |
91 | register_all_symbols_read(ld_plugin_all_symbols_read_handler handler); | |
92 | ||
93 | static enum ld_plugin_status | |
94 | register_cleanup(ld_plugin_cleanup_handler handler); | |
95 | ||
96 | static enum ld_plugin_status | |
97 | add_symbols(void *handle, int nsyms, const struct ld_plugin_symbol *syms); | |
98 | ||
0f7c0701 CC |
99 | static enum ld_plugin_status |
100 | get_input_file(const void *handle, struct ld_plugin_input_file *file); | |
101 | ||
9c793f14 RÁE |
102 | static enum ld_plugin_status |
103 | get_view(const void *handle, const void **viewp); | |
104 | ||
0f7c0701 CC |
105 | static enum ld_plugin_status |
106 | release_input_file(const void *handle); | |
107 | ||
89fc3421 CC |
108 | static enum ld_plugin_status |
109 | get_symbols(const void *handle, int nsyms, struct ld_plugin_symbol *syms); | |
110 | ||
235061c2 CC |
111 | static enum ld_plugin_status |
112 | get_symbols_v2(const void *handle, int nsyms, struct ld_plugin_symbol *syms); | |
113 | ||
89fc3421 | 114 | static enum ld_plugin_status |
6508b958 | 115 | add_input_file(const char *pathname); |
89fc3421 | 116 | |
e99daf92 | 117 | static enum ld_plugin_status |
6508b958 | 118 | add_input_library(const char *pathname); |
e99daf92 | 119 | |
42218b9f RÁE |
120 | static enum ld_plugin_status |
121 | set_extra_library_path(const char *path); | |
122 | ||
89fc3421 | 123 | static enum ld_plugin_status |
6c52134c | 124 | message(int level, const char *format, ...); |
89fc3421 | 125 | |
e9552f7e ST |
126 | static enum ld_plugin_status |
127 | get_input_section_count(const void* handle, unsigned int* count); | |
128 | ||
129 | static enum ld_plugin_status | |
130 | get_input_section_type(const struct ld_plugin_section section, | |
131 | unsigned int* type); | |
132 | ||
133 | static enum ld_plugin_status | |
134 | get_input_section_name(const struct ld_plugin_section section, | |
135 | char** section_name_ptr); | |
136 | ||
137 | static enum ld_plugin_status | |
138 | get_input_section_contents(const struct ld_plugin_section section, | |
139 | const unsigned char** section_contents, | |
140 | size_t* len); | |
141 | ||
142 | static enum ld_plugin_status | |
143 | update_section_order(const struct ld_plugin_section *section_list, | |
144 | unsigned int num_sections); | |
145 | ||
146 | static enum ld_plugin_status | |
147 | allow_section_ordering(); | |
148 | ||
16164a6b ST |
149 | static enum ld_plugin_status |
150 | allow_unique_segment_for_sections(); | |
151 | ||
152 | static enum ld_plugin_status | |
153 | unique_segment_for_sections(const char* segment_name, | |
154 | uint64_t flags, | |
155 | uint64_t align, | |
156 | const struct ld_plugin_section *section_list, | |
157 | unsigned int num_sections); | |
89fc3421 CC |
158 | }; |
159 | ||
160 | #endif // ENABLE_PLUGINS | |
161 | ||
162 | static Pluginobj* make_sized_plugin_object(Input_file* input_file, | |
0f7c0701 | 163 | off_t offset, off_t filesize); |
89fc3421 CC |
164 | |
165 | // Plugin methods. | |
166 | ||
167 | // Load one plugin library. | |
168 | ||
169 | void | |
170 | Plugin::load() | |
171 | { | |
172 | #ifdef ENABLE_PLUGINS | |
89fc3421 CC |
173 | // Load the plugin library. |
174 | // FIXME: Look for the library in standard locations. | |
4674ecfc | 175 | this->handle_ = dlopen(this->filename_.c_str(), RTLD_NOW); |
89fc3421 CC |
176 | if (this->handle_ == NULL) |
177 | { | |
4802450a RÁE |
178 | gold_error(_("%s: could not load plugin library: %s"), |
179 | this->filename_.c_str(), dlerror()); | |
89fc3421 CC |
180 | return; |
181 | } | |
182 | ||
183 | // Find the plugin's onload entry point. | |
b59befec ILT |
184 | void* ptr = dlsym(this->handle_, "onload"); |
185 | if (ptr == NULL) | |
89fc3421 | 186 | { |
4674ecfc CC |
187 | gold_error(_("%s: could not find onload entry point"), |
188 | this->filename_.c_str()); | |
89fc3421 CC |
189 | return; |
190 | } | |
b59befec ILT |
191 | ld_plugin_onload onload; |
192 | gold_assert(sizeof(onload) == sizeof(ptr)); | |
193 | memcpy(&onload, &ptr, sizeof(ptr)); | |
89fc3421 CC |
194 | |
195 | // Get the linker's version number. | |
196 | const char* ver = get_version_string(); | |
197 | int major = 0; | |
198 | int minor = 0; | |
199 | sscanf(ver, "%d.%d", &major, &minor); | |
200 | ||
201 | // Allocate and populate a transfer vector. | |
16164a6b | 202 | const int tv_fixed_size = 26; |
e9552f7e | 203 | |
4674ecfc | 204 | int tv_size = this->args_.size() + tv_fixed_size; |
ca09d69a | 205 | ld_plugin_tv* tv = new ld_plugin_tv[tv_size]; |
89fc3421 | 206 | |
abc8dcba CC |
207 | // Put LDPT_MESSAGE at the front of the list so the plugin can use it |
208 | // while processing subsequent entries. | |
89fc3421 | 209 | int i = 0; |
abc8dcba CC |
210 | tv[i].tv_tag = LDPT_MESSAGE; |
211 | tv[i].tv_u.tv_message = message; | |
212 | ||
213 | ++i; | |
89fc3421 CC |
214 | tv[i].tv_tag = LDPT_API_VERSION; |
215 | tv[i].tv_u.tv_val = LD_PLUGIN_API_VERSION; | |
216 | ||
217 | ++i; | |
218 | tv[i].tv_tag = LDPT_GOLD_VERSION; | |
219 | tv[i].tv_u.tv_val = major * 100 + minor; | |
220 | ||
221 | ++i; | |
222 | tv[i].tv_tag = LDPT_LINKER_OUTPUT; | |
223 | if (parameters->options().relocatable()) | |
224 | tv[i].tv_u.tv_val = LDPO_REL; | |
225 | else if (parameters->options().shared()) | |
226 | tv[i].tv_u.tv_val = LDPO_DYN; | |
370e30b6 RÁE |
227 | else if (parameters->options().pie()) |
228 | tv[i].tv_u.tv_val = LDPO_PIE; | |
89fc3421 CC |
229 | else |
230 | tv[i].tv_u.tv_val = LDPO_EXEC; | |
231 | ||
3537c84b RÁE |
232 | ++i; |
233 | tv[i].tv_tag = LDPT_OUTPUT_NAME; | |
234 | tv[i].tv_u.tv_string = parameters->options().output(); | |
235 | ||
4674ecfc | 236 | for (unsigned int j = 0; j < this->args_.size(); ++j) |
89fc3421 CC |
237 | { |
238 | ++i; | |
239 | tv[i].tv_tag = LDPT_OPTION; | |
4674ecfc | 240 | tv[i].tv_u.tv_string = this->args_[j].c_str(); |
89fc3421 CC |
241 | } |
242 | ||
243 | ++i; | |
244 | tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK; | |
245 | tv[i].tv_u.tv_register_claim_file = register_claim_file; | |
246 | ||
247 | ++i; | |
248 | tv[i].tv_tag = LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK; | |
249 | tv[i].tv_u.tv_register_all_symbols_read = register_all_symbols_read; | |
250 | ||
251 | ++i; | |
252 | tv[i].tv_tag = LDPT_REGISTER_CLEANUP_HOOK; | |
253 | tv[i].tv_u.tv_register_cleanup = register_cleanup; | |
254 | ||
255 | ++i; | |
256 | tv[i].tv_tag = LDPT_ADD_SYMBOLS; | |
257 | tv[i].tv_u.tv_add_symbols = add_symbols; | |
258 | ||
0f7c0701 CC |
259 | ++i; |
260 | tv[i].tv_tag = LDPT_GET_INPUT_FILE; | |
261 | tv[i].tv_u.tv_get_input_file = get_input_file; | |
262 | ||
9c793f14 RÁE |
263 | ++i; |
264 | tv[i].tv_tag = LDPT_GET_VIEW; | |
265 | tv[i].tv_u.tv_get_view = get_view; | |
266 | ||
0f7c0701 CC |
267 | ++i; |
268 | tv[i].tv_tag = LDPT_RELEASE_INPUT_FILE; | |
269 | tv[i].tv_u.tv_release_input_file = release_input_file; | |
270 | ||
89fc3421 CC |
271 | ++i; |
272 | tv[i].tv_tag = LDPT_GET_SYMBOLS; | |
273 | tv[i].tv_u.tv_get_symbols = get_symbols; | |
274 | ||
235061c2 CC |
275 | ++i; |
276 | tv[i].tv_tag = LDPT_GET_SYMBOLS_V2; | |
277 | tv[i].tv_u.tv_get_symbols = get_symbols_v2; | |
278 | ||
89fc3421 CC |
279 | ++i; |
280 | tv[i].tv_tag = LDPT_ADD_INPUT_FILE; | |
281 | tv[i].tv_u.tv_add_input_file = add_input_file; | |
282 | ||
e99daf92 ILT |
283 | ++i; |
284 | tv[i].tv_tag = LDPT_ADD_INPUT_LIBRARY; | |
285 | tv[i].tv_u.tv_add_input_library = add_input_library; | |
286 | ||
42218b9f RÁE |
287 | ++i; |
288 | tv[i].tv_tag = LDPT_SET_EXTRA_LIBRARY_PATH; | |
289 | tv[i].tv_u.tv_set_extra_library_path = set_extra_library_path; | |
290 | ||
e9552f7e ST |
291 | ++i; |
292 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_COUNT; | |
293 | tv[i].tv_u.tv_get_input_section_count = get_input_section_count; | |
294 | ||
295 | ++i; | |
296 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_TYPE; | |
297 | tv[i].tv_u.tv_get_input_section_type = get_input_section_type; | |
298 | ||
299 | ++i; | |
300 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_NAME; | |
301 | tv[i].tv_u.tv_get_input_section_name = get_input_section_name; | |
302 | ||
303 | ++i; | |
304 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_CONTENTS; | |
305 | tv[i].tv_u.tv_get_input_section_contents = get_input_section_contents; | |
306 | ||
307 | ++i; | |
308 | tv[i].tv_tag = LDPT_UPDATE_SECTION_ORDER; | |
309 | tv[i].tv_u.tv_update_section_order = update_section_order; | |
310 | ||
311 | ++i; | |
312 | tv[i].tv_tag = LDPT_ALLOW_SECTION_ORDERING; | |
313 | tv[i].tv_u.tv_allow_section_ordering = allow_section_ordering; | |
314 | ||
16164a6b ST |
315 | ++i; |
316 | tv[i].tv_tag = LDPT_ALLOW_UNIQUE_SEGMENT_FOR_SECTIONS; | |
317 | tv[i].tv_u.tv_allow_unique_segment_for_sections | |
318 | = allow_unique_segment_for_sections; | |
319 | ||
320 | ++i; | |
321 | tv[i].tv_tag = LDPT_UNIQUE_SEGMENT_FOR_SECTIONS; | |
322 | tv[i].tv_u.tv_unique_segment_for_sections = unique_segment_for_sections; | |
323 | ||
89fc3421 CC |
324 | ++i; |
325 | tv[i].tv_tag = LDPT_NULL; | |
326 | tv[i].tv_u.tv_val = 0; | |
327 | ||
328 | gold_assert(i == tv_size - 1); | |
329 | ||
330 | // Call the onload entry point. | |
331 | (*onload)(tv); | |
332 | ||
6c52134c | 333 | delete[] tv; |
89fc3421 CC |
334 | #endif // ENABLE_PLUGINS |
335 | } | |
336 | ||
337 | // Call the plugin claim-file handler. | |
338 | ||
339 | inline bool | |
ca09d69a | 340 | Plugin::claim_file(struct ld_plugin_input_file* plugin_input_file) |
89fc3421 CC |
341 | { |
342 | int claimed = 0; | |
343 | ||
344 | if (this->claim_file_handler_ != NULL) | |
345 | { | |
346 | (*this->claim_file_handler_)(plugin_input_file, &claimed); | |
347 | if (claimed) | |
348 | return true; | |
349 | } | |
350 | return false; | |
351 | } | |
352 | ||
353 | // Call the all-symbols-read handler. | |
354 | ||
355 | inline void | |
356 | Plugin::all_symbols_read() | |
357 | { | |
358 | if (this->all_symbols_read_handler_ != NULL) | |
359 | (*this->all_symbols_read_handler_)(); | |
360 | } | |
361 | ||
362 | // Call the cleanup handler. | |
363 | ||
364 | inline void | |
365 | Plugin::cleanup() | |
366 | { | |
40f36857 CC |
367 | if (this->cleanup_handler_ != NULL && !this->cleanup_done_) |
368 | { | |
369 | // Set this flag before calling to prevent a recursive plunge | |
370 | // in the event that a plugin's cleanup handler issues a | |
371 | // fatal error. | |
372 | this->cleanup_done_ = true; | |
373 | (*this->cleanup_handler_)(); | |
374 | } | |
89fc3421 CC |
375 | } |
376 | ||
0f3b89d8 ILT |
377 | // This task is used to rescan archives as needed. |
378 | ||
379 | class Plugin_rescan : public Task | |
380 | { | |
381 | public: | |
382 | Plugin_rescan(Task_token* this_blocker, Task_token* next_blocker) | |
383 | : this_blocker_(this_blocker), next_blocker_(next_blocker) | |
384 | { } | |
385 | ||
386 | ~Plugin_rescan() | |
387 | { | |
388 | delete this->this_blocker_; | |
389 | } | |
390 | ||
391 | Task_token* | |
392 | is_runnable() | |
393 | { | |
394 | if (this->this_blocker_->is_blocked()) | |
395 | return this->this_blocker_; | |
396 | return NULL; | |
397 | } | |
398 | ||
399 | void | |
400 | locks(Task_locker* tl) | |
401 | { tl->add(this, this->next_blocker_); } | |
402 | ||
403 | void | |
404 | run(Workqueue*) | |
405 | { parameters->options().plugins()->rescan(this); } | |
406 | ||
407 | std::string | |
408 | get_name() const | |
409 | { return "Plugin_rescan"; } | |
410 | ||
411 | private: | |
412 | Task_token* this_blocker_; | |
413 | Task_token* next_blocker_; | |
414 | }; | |
415 | ||
89fc3421 CC |
416 | // Plugin_manager methods. |
417 | ||
418 | Plugin_manager::~Plugin_manager() | |
419 | { | |
420 | for (Plugin_list::iterator p = this->plugins_.begin(); | |
421 | p != this->plugins_.end(); | |
422 | ++p) | |
423 | delete *p; | |
424 | this->plugins_.clear(); | |
425 | for (Object_list::iterator obj = this->objects_.begin(); | |
426 | obj != this->objects_.end(); | |
427 | ++obj) | |
428 | delete *obj; | |
429 | this->objects_.clear(); | |
d37ffe25 | 430 | delete this->lock_; |
89fc3421 CC |
431 | } |
432 | ||
433 | // Load all plugin libraries. | |
434 | ||
435 | void | |
e9552f7e | 436 | Plugin_manager::load_plugins(Layout* layout) |
89fc3421 | 437 | { |
e9552f7e | 438 | this->layout_ = layout; |
89fc3421 CC |
439 | for (this->current_ = this->plugins_.begin(); |
440 | this->current_ != this->plugins_.end(); | |
441 | ++this->current_) | |
442 | (*this->current_)->load(); | |
443 | } | |
444 | ||
445 | // Call the plugin claim-file handlers in turn to see if any claim the file. | |
446 | ||
447 | Pluginobj* | |
448 | Plugin_manager::claim_file(Input_file* input_file, off_t offset, | |
e9552f7e | 449 | off_t filesize, Object* elf_object) |
89fc3421 | 450 | { |
d37ffe25 ED |
451 | bool lock_initialized = this->initialize_lock_.initialize(); |
452 | ||
453 | gold_assert(lock_initialized); | |
454 | Hold_lock hl(*this->lock_); | |
89fc3421 CC |
455 | if (this->in_replacement_phase_) |
456 | return NULL; | |
457 | ||
458 | unsigned int handle = this->objects_.size(); | |
459 | this->input_file_ = input_file; | |
460 | this->plugin_input_file_.name = input_file->filename().c_str(); | |
461 | this->plugin_input_file_.fd = input_file->file().descriptor(); | |
462 | this->plugin_input_file_.offset = offset; | |
463 | this->plugin_input_file_.filesize = filesize; | |
464 | this->plugin_input_file_.handle = reinterpret_cast<void*>(handle); | |
e9552f7e ST |
465 | if (elf_object != NULL) |
466 | this->objects_.push_back(elf_object); | |
467 | this->in_claim_file_handler_ = true; | |
89fc3421 CC |
468 | |
469 | for (this->current_ = this->plugins_.begin(); | |
470 | this->current_ != this->plugins_.end(); | |
471 | ++this->current_) | |
472 | { | |
473 | if ((*this->current_)->claim_file(&this->plugin_input_file_)) | |
474 | { | |
0f3b89d8 | 475 | this->any_claimed_ = true; |
e9552f7e | 476 | this->in_claim_file_handler_ = false; |
0f3b89d8 | 477 | |
e9552f7e ST |
478 | if (this->objects_.size() > handle |
479 | && this->objects_[handle]->pluginobj() != NULL) | |
480 | return this->objects_[handle]->pluginobj(); | |
abc8dcba CC |
481 | |
482 | // If the plugin claimed the file but did not call the | |
483 | // add_symbols callback, we need to create the Pluginobj now. | |
484 | Pluginobj* obj = this->make_plugin_object(handle); | |
485 | return obj; | |
89fc3421 CC |
486 | } |
487 | } | |
488 | ||
e9552f7e | 489 | this->in_claim_file_handler_ = false; |
89fc3421 CC |
490 | return NULL; |
491 | } | |
492 | ||
0f3b89d8 ILT |
493 | // Save an archive. This is used so that a plugin can add a file |
494 | // which refers to a symbol which was not previously referenced. In | |
495 | // that case we want to pretend that the symbol was referenced before, | |
496 | // and pull in the archive object. | |
497 | ||
498 | void | |
499 | Plugin_manager::save_archive(Archive* archive) | |
500 | { | |
501 | if (this->in_replacement_phase_ || !this->any_claimed_) | |
502 | delete archive; | |
503 | else | |
504 | this->rescannable_.push_back(Rescannable(archive)); | |
505 | } | |
506 | ||
507 | // Save an Input_group. This is like save_archive. | |
508 | ||
509 | void | |
510 | Plugin_manager::save_input_group(Input_group* input_group) | |
511 | { | |
512 | if (this->in_replacement_phase_ || !this->any_claimed_) | |
513 | delete input_group; | |
514 | else | |
515 | this->rescannable_.push_back(Rescannable(input_group)); | |
516 | } | |
517 | ||
89fc3421 CC |
518 | // Call the all-symbols-read handlers. |
519 | ||
520 | void | |
0f7c0701 | 521 | Plugin_manager::all_symbols_read(Workqueue* workqueue, Task* task, |
89fc3421 | 522 | Input_objects* input_objects, |
e9552f7e | 523 | Symbol_table* symtab, |
89fc3421 CC |
524 | Dirsearch* dirpath, Mapfile* mapfile, |
525 | Task_token** last_blocker) | |
526 | { | |
527 | this->in_replacement_phase_ = true; | |
528 | this->workqueue_ = workqueue; | |
0f7c0701 | 529 | this->task_ = task; |
89fc3421 CC |
530 | this->input_objects_ = input_objects; |
531 | this->symtab_ = symtab; | |
89fc3421 CC |
532 | this->dirpath_ = dirpath; |
533 | this->mapfile_ = mapfile; | |
534 | this->this_blocker_ = NULL; | |
535 | ||
536 | for (this->current_ = this->plugins_.begin(); | |
537 | this->current_ != this->plugins_.end(); | |
538 | ++this->current_) | |
539 | (*this->current_)->all_symbols_read(); | |
540 | ||
0f3b89d8 ILT |
541 | if (this->any_added_) |
542 | { | |
543 | Task_token* next_blocker = new Task_token(true); | |
544 | next_blocker->add_blocker(); | |
545 | workqueue->queue(new Plugin_rescan(this->this_blocker_, next_blocker)); | |
546 | this->this_blocker_ = next_blocker; | |
547 | } | |
548 | ||
89fc3421 CC |
549 | *last_blocker = this->this_blocker_; |
550 | } | |
551 | ||
0f3b89d8 ILT |
552 | // This is called when we see a new undefined symbol. If we are in |
553 | // the replacement phase, this means that we may need to rescan some | |
554 | // archives we have previously seen. | |
555 | ||
556 | void | |
557 | Plugin_manager::new_undefined_symbol(Symbol* sym) | |
558 | { | |
559 | if (this->in_replacement_phase_) | |
560 | this->undefined_symbols_.push_back(sym); | |
561 | } | |
562 | ||
563 | // Rescan archives as needed. This handles the case where a new | |
564 | // object file added by a plugin has an undefined reference to some | |
565 | // symbol defined in an archive. | |
566 | ||
567 | void | |
568 | Plugin_manager::rescan(Task* task) | |
569 | { | |
570 | size_t rescan_pos = 0; | |
571 | size_t rescan_size = this->rescannable_.size(); | |
572 | while (!this->undefined_symbols_.empty()) | |
573 | { | |
574 | if (rescan_pos >= rescan_size) | |
575 | { | |
576 | this->undefined_symbols_.clear(); | |
577 | return; | |
578 | } | |
579 | ||
580 | Undefined_symbol_list undefs; | |
581 | undefs.reserve(this->undefined_symbols_.size()); | |
582 | this->undefined_symbols_.swap(undefs); | |
583 | ||
584 | size_t min_rescan_pos = rescan_size; | |
585 | ||
586 | for (Undefined_symbol_list::const_iterator p = undefs.begin(); | |
587 | p != undefs.end(); | |
588 | ++p) | |
589 | { | |
590 | if (!(*p)->is_undefined()) | |
591 | continue; | |
592 | ||
593 | this->undefined_symbols_.push_back(*p); | |
594 | ||
595 | // Find the first rescan archive which defines this symbol, | |
596 | // starting at the current rescan position. The rescan position | |
597 | // exists so that given -la -lb -lc we don't look for undefined | |
598 | // symbols in -lb back in -la, but instead get the definition | |
599 | // from -lc. Don't bother to look past the current minimum | |
600 | // rescan position. | |
601 | for (size_t i = rescan_pos; i < min_rescan_pos; ++i) | |
602 | { | |
603 | if (this->rescannable_defines(i, *p)) | |
604 | { | |
605 | min_rescan_pos = i; | |
606 | break; | |
607 | } | |
608 | } | |
609 | } | |
610 | ||
611 | if (min_rescan_pos >= rescan_size) | |
612 | { | |
613 | // We didn't find any rescannable archives which define any | |
614 | // undefined symbols. | |
615 | return; | |
616 | } | |
617 | ||
618 | const Rescannable& r(this->rescannable_[min_rescan_pos]); | |
619 | if (r.is_archive) | |
620 | { | |
621 | Task_lock_obj<Archive> tl(task, r.u.archive); | |
622 | r.u.archive->add_symbols(this->symtab_, this->layout_, | |
623 | this->input_objects_, this->mapfile_); | |
624 | } | |
625 | else | |
626 | { | |
627 | size_t next_saw_undefined = this->symtab_->saw_undefined(); | |
628 | size_t saw_undefined; | |
629 | do | |
630 | { | |
631 | saw_undefined = next_saw_undefined; | |
632 | ||
633 | for (Input_group::const_iterator p = r.u.input_group->begin(); | |
634 | p != r.u.input_group->end(); | |
635 | ++p) | |
636 | { | |
637 | Task_lock_obj<Archive> tl(task, *p); | |
638 | ||
639 | (*p)->add_symbols(this->symtab_, this->layout_, | |
640 | this->input_objects_, this->mapfile_); | |
641 | } | |
642 | ||
643 | next_saw_undefined = this->symtab_->saw_undefined(); | |
644 | } | |
645 | while (saw_undefined != next_saw_undefined); | |
646 | } | |
647 | ||
648 | for (size_t i = rescan_pos; i < min_rescan_pos + 1; ++i) | |
649 | { | |
650 | if (this->rescannable_[i].is_archive) | |
651 | delete this->rescannable_[i].u.archive; | |
652 | else | |
653 | delete this->rescannable_[i].u.input_group; | |
654 | } | |
655 | ||
656 | rescan_pos = min_rescan_pos + 1; | |
657 | } | |
658 | } | |
659 | ||
660 | // Return whether the rescannable at index I defines SYM. | |
661 | ||
662 | bool | |
663 | Plugin_manager::rescannable_defines(size_t i, Symbol* sym) | |
664 | { | |
665 | const Rescannable& r(this->rescannable_[i]); | |
666 | if (r.is_archive) | |
667 | return r.u.archive->defines_symbol(sym); | |
668 | else | |
669 | { | |
670 | for (Input_group::const_iterator p = r.u.input_group->begin(); | |
671 | p != r.u.input_group->end(); | |
672 | ++p) | |
673 | { | |
674 | if ((*p)->defines_symbol(sym)) | |
675 | return true; | |
676 | } | |
677 | return false; | |
678 | } | |
679 | } | |
680 | ||
483620e8 | 681 | // Layout deferred objects. |
89fc3421 CC |
682 | |
683 | void | |
483620e8 | 684 | Plugin_manager::layout_deferred_objects() |
89fc3421 | 685 | { |
5995b570 CC |
686 | Deferred_layout_list::iterator obj; |
687 | ||
688 | for (obj = this->deferred_layout_objects_.begin(); | |
689 | obj != this->deferred_layout_objects_.end(); | |
690 | ++obj) | |
5f9bcf58 CC |
691 | { |
692 | // Lock the object so we can read from it. This is only called | |
693 | // single-threaded from queue_middle_tasks, so it is OK to lock. | |
694 | // Unfortunately we have no way to pass in a Task token. | |
695 | const Task* dummy_task = reinterpret_cast<const Task*>(-1); | |
696 | Task_lock_obj<Object> tl(dummy_task, *obj); | |
697 | (*obj)->layout_deferred_sections(this->layout_); | |
698 | } | |
483620e8 CC |
699 | } |
700 | ||
701 | // Call the cleanup handlers. | |
5995b570 | 702 | |
483620e8 CC |
703 | void |
704 | Plugin_manager::cleanup() | |
705 | { | |
20e2a8aa ILT |
706 | if (this->any_added_) |
707 | { | |
708 | // If any input files were added, close all the input files. | |
709 | // This is because the plugin may want to remove them, and on | |
710 | // Windows you are not allowed to remove an open file. | |
711 | close_all_descriptors(); | |
712 | } | |
713 | ||
89fc3421 CC |
714 | for (this->current_ = this->plugins_.begin(); |
715 | this->current_ != this->plugins_.end(); | |
716 | ++this->current_) | |
717 | (*this->current_)->cleanup(); | |
718 | } | |
719 | ||
720 | // Make a new Pluginobj object. This is called when the plugin calls | |
721 | // the add_symbols API. | |
722 | ||
723 | Pluginobj* | |
724 | Plugin_manager::make_plugin_object(unsigned int handle) | |
725 | { | |
726 | // Make sure we aren't asked to make an object for the same handle twice. | |
e9552f7e ST |
727 | if (this->objects_.size() != handle |
728 | && this->objects_[handle]->pluginobj() != NULL) | |
89fc3421 CC |
729 | return NULL; |
730 | ||
731 | Pluginobj* obj = make_sized_plugin_object(this->input_file_, | |
0f7c0701 CC |
732 | this->plugin_input_file_.offset, |
733 | this->plugin_input_file_.filesize); | |
e9552f7e ST |
734 | |
735 | ||
736 | // If the elf object for this file was pushed into the objects_ vector, delete | |
737 | // it to make room for the Pluginobj as this file is claimed. | |
738 | if (this->objects_.size() != handle) | |
739 | this->objects_.pop_back(); | |
740 | ||
89fc3421 CC |
741 | this->objects_.push_back(obj); |
742 | return obj; | |
743 | } | |
744 | ||
0f7c0701 CC |
745 | // Get the input file information with an open (possibly re-opened) |
746 | // file descriptor. | |
747 | ||
748 | ld_plugin_status | |
749 | Plugin_manager::get_input_file(unsigned int handle, | |
ca09d69a | 750 | struct ld_plugin_input_file* file) |
0f7c0701 | 751 | { |
e9552f7e | 752 | Pluginobj* obj = this->object(handle)->pluginobj(); |
0f7c0701 CC |
753 | if (obj == NULL) |
754 | return LDPS_BAD_HANDLE; | |
755 | ||
756 | obj->lock(this->task_); | |
757 | file->name = obj->filename().c_str(); | |
758 | file->fd = obj->descriptor(); | |
759 | file->offset = obj->offset(); | |
760 | file->filesize = obj->filesize(); | |
761 | file->handle = reinterpret_cast<void*>(handle); | |
762 | return LDPS_OK; | |
763 | } | |
764 | ||
765 | // Release the input file. | |
766 | ||
767 | ld_plugin_status | |
768 | Plugin_manager::release_input_file(unsigned int handle) | |
769 | { | |
e9552f7e ST |
770 | if (this->object(handle) == NULL) |
771 | return LDPS_BAD_HANDLE; | |
772 | ||
773 | Pluginobj* obj = this->object(handle)->pluginobj(); | |
774 | ||
0f7c0701 CC |
775 | if (obj == NULL) |
776 | return LDPS_BAD_HANDLE; | |
777 | ||
778 | obj->unlock(this->task_); | |
779 | return LDPS_OK; | |
780 | } | |
781 | ||
e9552f7e ST |
782 | // Get the elf object corresponding to the handle. Return NULL if we |
783 | // found a Pluginobj instead. | |
784 | ||
785 | Object* | |
786 | Plugin_manager::get_elf_object(const void* handle) | |
787 | { | |
788 | Object* obj = this->object( | |
789 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
790 | ||
791 | // The object should not be a Pluginobj. | |
792 | if (obj == NULL | |
793 | || obj->pluginobj() != NULL) | |
794 | return NULL; | |
795 | ||
796 | return obj; | |
797 | } | |
798 | ||
9c793f14 RÁE |
799 | ld_plugin_status |
800 | Plugin_manager::get_view(unsigned int handle, const void **viewp) | |
801 | { | |
802 | off_t offset; | |
803 | size_t filesize; | |
804 | Input_file *input_file; | |
e9552f7e | 805 | if (this->in_claim_file_handler_) |
9c793f14 RÁE |
806 | { |
807 | // We are being called from the claim_file hook. | |
808 | const struct ld_plugin_input_file &f = this->plugin_input_file_; | |
809 | offset = f.offset; | |
810 | filesize = f.filesize; | |
811 | input_file = this->input_file_; | |
812 | } | |
813 | else | |
814 | { | |
815 | // An already claimed file. | |
e9552f7e ST |
816 | if (this->object(handle) == NULL) |
817 | return LDPS_BAD_HANDLE; | |
818 | Pluginobj* obj = this->object(handle)->pluginobj(); | |
9c793f14 RÁE |
819 | if (obj == NULL) |
820 | return LDPS_BAD_HANDLE; | |
821 | offset = obj->offset(); | |
822 | filesize = obj->filesize(); | |
823 | input_file = obj->input_file(); | |
824 | } | |
825 | *viewp = (void*) input_file->file().get_view(offset, 0, filesize, false, | |
826 | false); | |
827 | return LDPS_OK; | |
828 | } | |
829 | ||
42218b9f RÁE |
830 | // Add a new library path. |
831 | ||
832 | ld_plugin_status | |
ca09d69a | 833 | Plugin_manager::set_extra_library_path(const char* path) |
42218b9f RÁE |
834 | { |
835 | this->extra_search_path_ = std::string(path); | |
836 | return LDPS_OK; | |
837 | } | |
838 | ||
89fc3421 CC |
839 | // Add a new input file. |
840 | ||
841 | ld_plugin_status | |
ca09d69a | 842 | Plugin_manager::add_input_file(const char* pathname, bool is_lib) |
89fc3421 | 843 | { |
ae3b5189 CD |
844 | Input_file_argument file(pathname, |
845 | (is_lib | |
846 | ? Input_file_argument::INPUT_FILE_TYPE_LIBRARY | |
847 | : Input_file_argument::INPUT_FILE_TYPE_FILE), | |
42218b9f RÁE |
848 | (is_lib |
849 | ? this->extra_search_path_.c_str() | |
850 | : ""), | |
851 | false, | |
852 | this->options_); | |
89fc3421 CC |
853 | Input_argument* input_argument = new Input_argument(file); |
854 | Task_token* next_blocker = new Task_token(true); | |
855 | next_blocker->add_blocker(); | |
8c21d9d3 | 856 | if (parameters->incremental()) |
40f36857 CC |
857 | gold_error(_("input files added by plug-ins in --incremental mode not " |
858 | "supported yet")); | |
f1ed28fb | 859 | this->workqueue_->queue_soon(new Read_symbols(this->input_objects_, |
89fc3421 CC |
860 | this->symtab_, |
861 | this->layout_, | |
862 | this->dirpath_, | |
15f8229b | 863 | 0, |
89fc3421 CC |
864 | this->mapfile_, |
865 | input_argument, | |
866 | NULL, | |
b0193076 | 867 | NULL, |
89fc3421 CC |
868 | this->this_blocker_, |
869 | next_blocker)); | |
870 | this->this_blocker_ = next_blocker; | |
0f3b89d8 | 871 | this->any_added_ = true; |
89fc3421 CC |
872 | return LDPS_OK; |
873 | } | |
874 | ||
875 | // Class Pluginobj. | |
876 | ||
2ea97941 ILT |
877 | Pluginobj::Pluginobj(const std::string& name, Input_file* input_file, |
878 | off_t offset, off_t filesize) | |
879 | : Object(name, input_file, false, offset), | |
880 | nsyms_(0), syms_(NULL), symbols_(), filesize_(filesize), comdat_map_() | |
89fc3421 CC |
881 | { |
882 | } | |
883 | ||
235061c2 | 884 | // Return TRUE if a defined symbol is referenced from outside the |
f7c5b166 CC |
885 | // universe of claimed objects. Only references from relocatable, |
886 | // non-IR (unclaimed) objects count as a reference. References from | |
887 | // dynamic objects count only as "visible". | |
d66a9eb3 CC |
888 | |
889 | static inline bool | |
235061c2 | 890 | is_referenced_from_outside(Symbol* lsym) |
d66a9eb3 CC |
891 | { |
892 | if (lsym->in_real_elf()) | |
893 | return true; | |
894 | if (parameters->options().relocatable()) | |
895 | return true; | |
84ced98a RÁE |
896 | if (parameters->options().is_undefined(lsym->name())) |
897 | return true; | |
235061c2 CC |
898 | return false; |
899 | } | |
900 | ||
901 | // Return TRUE if a defined symbol might be reachable from outside the | |
902 | // load module. | |
903 | ||
904 | static inline bool | |
905 | is_visible_from_outside(Symbol* lsym) | |
906 | { | |
f7c5b166 CC |
907 | if (lsym->in_dyn()) |
908 | return true; | |
d66a9eb3 CC |
909 | if (parameters->options().export_dynamic() || parameters->options().shared()) |
910 | return lsym->is_externally_visible(); | |
911 | return false; | |
912 | } | |
913 | ||
89fc3421 CC |
914 | // Get symbol resolution info. |
915 | ||
916 | ld_plugin_status | |
3c537f7f PC |
917 | Pluginobj::get_symbol_resolution_info(Symbol_table* symtab, |
918 | int nsyms, | |
235061c2 CC |
919 | ld_plugin_symbol* syms, |
920 | int version) const | |
921 | { | |
922 | // For version 1 of this interface, we cannot use | |
923 | // LDPR_PREVAILING_DEF_IRONLY_EXP, so we return LDPR_PREVAILING_DEF | |
924 | // instead. | |
925 | const ld_plugin_symbol_resolution ldpr_prevailing_def_ironly_exp | |
926 | = (version > 1 | |
927 | ? LDPR_PREVAILING_DEF_IRONLY_EXP | |
928 | : LDPR_PREVAILING_DEF); | |
929 | ||
abc8dcba | 930 | if (nsyms > this->nsyms_) |
89fc3421 | 931 | return LDPS_NO_SYMS; |
b0193076 RÁE |
932 | |
933 | if (static_cast<size_t>(nsyms) > this->symbols_.size()) | |
934 | { | |
935 | // We never decided to include this object. We mark all symbols as | |
936 | // preempted. | |
ca09d69a | 937 | gold_assert(this->symbols_.size() == 0); |
b0193076 RÁE |
938 | for (int i = 0; i < nsyms; i++) |
939 | syms[i].resolution = LDPR_PREEMPTED_REG; | |
940 | return LDPS_OK; | |
941 | } | |
942 | ||
89fc3421 CC |
943 | for (int i = 0; i < nsyms; i++) |
944 | { | |
945 | ld_plugin_symbol* isym = &syms[i]; | |
946 | Symbol* lsym = this->symbols_[i]; | |
3c537f7f PC |
947 | if (lsym->is_forwarder()) |
948 | lsym = symtab->resolve_forwards(lsym); | |
89fc3421 CC |
949 | ld_plugin_symbol_resolution res = LDPR_UNKNOWN; |
950 | ||
951 | if (lsym->is_undefined()) | |
952 | // The symbol remains undefined. | |
953 | res = LDPR_UNDEF; | |
954 | else if (isym->def == LDPK_UNDEF | |
955 | || isym->def == LDPK_WEAKUNDEF | |
956 | || isym->def == LDPK_COMMON) | |
957 | { | |
958 | // The original symbol was undefined or common. | |
959 | if (lsym->source() != Symbol::FROM_OBJECT) | |
960 | res = LDPR_RESOLVED_EXEC; | |
be234d88 | 961 | else if (lsym->object()->pluginobj() == this) |
235061c2 CC |
962 | { |
963 | if (is_referenced_from_outside(lsym)) | |
964 | res = LDPR_PREVAILING_DEF; | |
965 | else if (is_visible_from_outside(lsym)) | |
966 | res = ldpr_prevailing_def_ironly_exp; | |
967 | else | |
968 | res = LDPR_PREVAILING_DEF_IRONLY; | |
969 | } | |
89fc3421 CC |
970 | else if (lsym->object()->pluginobj() != NULL) |
971 | res = LDPR_RESOLVED_IR; | |
972 | else if (lsym->object()->is_dynamic()) | |
973 | res = LDPR_RESOLVED_DYN; | |
974 | else | |
975 | res = LDPR_RESOLVED_EXEC; | |
976 | } | |
977 | else | |
978 | { | |
979 | // The original symbol was a definition. | |
980 | if (lsym->source() != Symbol::FROM_OBJECT) | |
981 | res = LDPR_PREEMPTED_REG; | |
982 | else if (lsym->object() == static_cast<const Object*>(this)) | |
235061c2 CC |
983 | { |
984 | if (is_referenced_from_outside(lsym)) | |
985 | res = LDPR_PREVAILING_DEF; | |
986 | else if (is_visible_from_outside(lsym)) | |
987 | res = ldpr_prevailing_def_ironly_exp; | |
988 | else | |
989 | res = LDPR_PREVAILING_DEF_IRONLY; | |
990 | } | |
89fc3421 CC |
991 | else |
992 | res = (lsym->object()->pluginobj() != NULL | |
993 | ? LDPR_PREEMPTED_IR | |
994 | : LDPR_PREEMPTED_REG); | |
995 | } | |
996 | isym->resolution = res; | |
997 | } | |
998 | return LDPS_OK; | |
999 | } | |
1000 | ||
1001 | // Return TRUE if the comdat group with key COMDAT_KEY from this object | |
1002 | // should be kept. | |
1003 | ||
1004 | bool | |
2ea97941 | 1005 | Pluginobj::include_comdat_group(std::string comdat_key, Layout* layout) |
89fc3421 CC |
1006 | { |
1007 | std::pair<Comdat_map::iterator, bool> ins = | |
1008 | this->comdat_map_.insert(std::make_pair(comdat_key, false)); | |
1009 | ||
1010 | // If this is the first time we've seen this comdat key, ask the | |
1011 | // layout object whether it should be included. | |
1012 | if (ins.second) | |
2ea97941 ILT |
1013 | ins.first->second = layout->find_or_add_kept_section(comdat_key, |
1014 | NULL, 0, true, | |
1015 | true, NULL); | |
89fc3421 CC |
1016 | |
1017 | return ins.first->second; | |
1018 | } | |
1019 | ||
1020 | // Class Sized_pluginobj. | |
1021 | ||
1022 | template<int size, bool big_endian> | |
1023 | Sized_pluginobj<size, big_endian>::Sized_pluginobj( | |
2ea97941 ILT |
1024 | const std::string& name, |
1025 | Input_file* input_file, | |
1026 | off_t offset, | |
1027 | off_t filesize) | |
1028 | : Pluginobj(name, input_file, offset, filesize) | |
89fc3421 CC |
1029 | { |
1030 | } | |
1031 | ||
1032 | // Read the symbols. Not used for plugin objects. | |
1033 | ||
1034 | template<int size, bool big_endian> | |
1035 | void | |
1036 | Sized_pluginobj<size, big_endian>::do_read_symbols(Read_symbols_data*) | |
1037 | { | |
1038 | gold_unreachable(); | |
1039 | } | |
1040 | ||
1041 | // Lay out the input sections. Not used for plugin objects. | |
1042 | ||
1043 | template<int size, bool big_endian> | |
1044 | void | |
1045 | Sized_pluginobj<size, big_endian>::do_layout(Symbol_table*, Layout*, | |
1046 | Read_symbols_data*) | |
1047 | { | |
1048 | gold_unreachable(); | |
1049 | } | |
1050 | ||
1051 | // Add the symbols to the symbol table. | |
1052 | ||
89fc3421 CC |
1053 | template<int size, bool big_endian> |
1054 | void | |
1055 | Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table* symtab, | |
f488e4b0 | 1056 | Read_symbols_data*, |
2ea97941 | 1057 | Layout* layout) |
89fc3421 CC |
1058 | { |
1059 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1060 | unsigned char symbuf[sym_size]; | |
1061 | elfcpp::Sym<size, big_endian> sym(symbuf); | |
1062 | elfcpp::Sym_write<size, big_endian> osym(symbuf); | |
1063 | ||
89fc3421 CC |
1064 | this->symbols_.resize(this->nsyms_); |
1065 | ||
1066 | for (int i = 0; i < this->nsyms_; ++i) | |
1067 | { | |
ca09d69a | 1068 | const struct ld_plugin_symbol* isym = &this->syms_[i]; |
2ea97941 | 1069 | const char* name = isym->name; |
89fc3421 CC |
1070 | const char* ver = isym->version; |
1071 | elfcpp::Elf_Half shndx; | |
1072 | elfcpp::STB bind; | |
1073 | elfcpp::STV vis; | |
1074 | ||
2ea97941 ILT |
1075 | if (name != NULL && name[0] == '\0') |
1076 | name = NULL; | |
89fc3421 CC |
1077 | if (ver != NULL && ver[0] == '\0') |
1078 | ver = NULL; | |
1079 | ||
1080 | switch (isym->def) | |
1081 | { | |
1082 | case LDPK_WEAKDEF: | |
1083 | case LDPK_WEAKUNDEF: | |
1084 | bind = elfcpp::STB_WEAK; | |
1085 | break; | |
1086 | case LDPK_DEF: | |
1087 | case LDPK_UNDEF: | |
1088 | case LDPK_COMMON: | |
1089 | default: | |
1090 | bind = elfcpp::STB_GLOBAL; | |
1091 | break; | |
1092 | } | |
1093 | ||
1094 | switch (isym->def) | |
1095 | { | |
1096 | case LDPK_DEF: | |
1097 | case LDPK_WEAKDEF: | |
1098 | shndx = elfcpp::SHN_ABS; | |
1099 | break; | |
1100 | case LDPK_COMMON: | |
1101 | shndx = elfcpp::SHN_COMMON; | |
1102 | break; | |
1103 | case LDPK_UNDEF: | |
1104 | case LDPK_WEAKUNDEF: | |
1105 | default: | |
1106 | shndx = elfcpp::SHN_UNDEF; | |
1107 | break; | |
1108 | } | |
1109 | ||
1110 | switch (isym->visibility) | |
1111 | { | |
1112 | case LDPV_PROTECTED: | |
105b6afd | 1113 | vis = elfcpp::STV_PROTECTED; |
89fc3421 CC |
1114 | break; |
1115 | case LDPV_INTERNAL: | |
105b6afd | 1116 | vis = elfcpp::STV_INTERNAL; |
89fc3421 CC |
1117 | break; |
1118 | case LDPV_HIDDEN: | |
105b6afd | 1119 | vis = elfcpp::STV_HIDDEN; |
89fc3421 CC |
1120 | break; |
1121 | case LDPV_DEFAULT: | |
1122 | default: | |
1123 | vis = elfcpp::STV_DEFAULT; | |
1124 | break; | |
1125 | } | |
1126 | ||
1127 | if (isym->comdat_key != NULL | |
1128 | && isym->comdat_key[0] != '\0' | |
2ea97941 | 1129 | && !this->include_comdat_group(isym->comdat_key, layout)) |
89fc3421 CC |
1130 | shndx = elfcpp::SHN_UNDEF; |
1131 | ||
1132 | osym.put_st_name(0); | |
1133 | osym.put_st_value(0); | |
6168c2a1 | 1134 | osym.put_st_size(0); |
89fc3421 CC |
1135 | osym.put_st_info(bind, elfcpp::STT_NOTYPE); |
1136 | osym.put_st_other(vis, 0); | |
1137 | osym.put_st_shndx(shndx); | |
1138 | ||
1139 | this->symbols_[i] = | |
2ea97941 | 1140 | symtab->add_from_pluginobj<size, big_endian>(this, name, ver, &sym); |
89fc3421 CC |
1141 | } |
1142 | } | |
1143 | ||
b0193076 RÁE |
1144 | template<int size, bool big_endian> |
1145 | Archive::Should_include | |
1146 | Sized_pluginobj<size, big_endian>::do_should_include_member( | |
88a4108b ILT |
1147 | Symbol_table* symtab, |
1148 | Layout* layout, | |
1149 | Read_symbols_data*, | |
1150 | std::string* why) | |
b0193076 RÁE |
1151 | { |
1152 | char* tmpbuf = NULL; | |
1153 | size_t tmpbuflen = 0; | |
1154 | ||
88a4108b ILT |
1155 | for (int i = 0; i < this->nsyms_; ++i) |
1156 | { | |
1157 | const struct ld_plugin_symbol& sym = this->syms_[i]; | |
1158 | const char* name = sym.name; | |
1159 | Symbol* symbol; | |
1160 | Archive::Should_include t = Archive::should_include_member(symtab, | |
1161 | layout, | |
1162 | name, | |
1163 | &symbol, why, | |
1164 | &tmpbuf, | |
1165 | &tmpbuflen); | |
b0193076 RÁE |
1166 | if (t == Archive::SHOULD_INCLUDE_YES) |
1167 | { | |
1168 | if (tmpbuf != NULL) | |
1169 | free(tmpbuf); | |
1170 | return t; | |
1171 | } | |
88a4108b | 1172 | } |
b0193076 RÁE |
1173 | if (tmpbuf != NULL) |
1174 | free(tmpbuf); | |
1175 | return Archive::SHOULD_INCLUDE_UNKNOWN; | |
1176 | } | |
1177 | ||
e0c52780 CC |
1178 | // Iterate over global symbols, calling a visitor class V for each. |
1179 | ||
1180 | template<int size, bool big_endian> | |
1181 | void | |
1182 | Sized_pluginobj<size, big_endian>::do_for_all_global_symbols( | |
1183 | Read_symbols_data*, | |
1184 | Library_base::Symbol_visitor_base* v) | |
1185 | { | |
1186 | for (int i = 0; i < this->nsyms_; ++i) | |
1187 | { | |
1188 | const struct ld_plugin_symbol& sym = this->syms_[i]; | |
1189 | if (sym.def != LDPK_UNDEF) | |
1190 | v->visit(sym.name); | |
1191 | } | |
1192 | } | |
1193 | ||
cdc29364 CC |
1194 | // Iterate over local symbols, calling a visitor class V for each GOT offset |
1195 | // associated with a local symbol. | |
1196 | template<int size, bool big_endian> | |
1197 | void | |
1198 | Sized_pluginobj<size, big_endian>::do_for_all_local_got_entries( | |
1199 | Got_offset_list::Visitor*) const | |
1200 | { | |
1201 | gold_unreachable(); | |
1202 | } | |
1203 | ||
89fc3421 CC |
1204 | // Get the size of a section. Not used for plugin objects. |
1205 | ||
1206 | template<int size, bool big_endian> | |
1207 | uint64_t | |
1208 | Sized_pluginobj<size, big_endian>::do_section_size(unsigned int) | |
1209 | { | |
1210 | gold_unreachable(); | |
1211 | return 0; | |
1212 | } | |
1213 | ||
1214 | // Get the name of a section. Not used for plugin objects. | |
1215 | ||
1216 | template<int size, bool big_endian> | |
1217 | std::string | |
54674d38 | 1218 | Sized_pluginobj<size, big_endian>::do_section_name(unsigned int) const |
89fc3421 CC |
1219 | { |
1220 | gold_unreachable(); | |
1221 | return std::string(); | |
1222 | } | |
1223 | ||
1224 | // Return a view of the contents of a section. Not used for plugin objects. | |
1225 | ||
1226 | template<int size, bool big_endian> | |
c1027032 CC |
1227 | const unsigned char* |
1228 | Sized_pluginobj<size, big_endian>::do_section_contents( | |
1229 | unsigned int, | |
1230 | section_size_type*, | |
1231 | bool) | |
89fc3421 | 1232 | { |
89fc3421 | 1233 | gold_unreachable(); |
c1027032 | 1234 | return NULL; |
89fc3421 CC |
1235 | } |
1236 | ||
1237 | // Return section flags. Not used for plugin objects. | |
1238 | ||
1239 | template<int size, bool big_endian> | |
1240 | uint64_t | |
1241 | Sized_pluginobj<size, big_endian>::do_section_flags(unsigned int) | |
1242 | { | |
1243 | gold_unreachable(); | |
1244 | return 0; | |
1245 | } | |
1246 | ||
ef15dade ST |
1247 | // Return section entsize. Not used for plugin objects. |
1248 | ||
1249 | template<int size, bool big_endian> | |
1250 | uint64_t | |
1251 | Sized_pluginobj<size, big_endian>::do_section_entsize(unsigned int) | |
1252 | { | |
1253 | gold_unreachable(); | |
1254 | return 0; | |
1255 | } | |
1256 | ||
89fc3421 CC |
1257 | // Return section address. Not used for plugin objects. |
1258 | ||
1259 | template<int size, bool big_endian> | |
1260 | uint64_t | |
1261 | Sized_pluginobj<size, big_endian>::do_section_address(unsigned int) | |
1262 | { | |
1263 | gold_unreachable(); | |
1264 | return 0; | |
1265 | } | |
1266 | ||
1267 | // Return section type. Not used for plugin objects. | |
1268 | ||
1269 | template<int size, bool big_endian> | |
1270 | unsigned int | |
1271 | Sized_pluginobj<size, big_endian>::do_section_type(unsigned int) | |
1272 | { | |
1273 | gold_unreachable(); | |
1274 | return 0; | |
1275 | } | |
1276 | ||
1277 | // Return the section link field. Not used for plugin objects. | |
1278 | ||
1279 | template<int size, bool big_endian> | |
1280 | unsigned int | |
1281 | Sized_pluginobj<size, big_endian>::do_section_link(unsigned int) | |
1282 | { | |
1283 | gold_unreachable(); | |
1284 | return 0; | |
1285 | } | |
1286 | ||
1287 | // Return the section link field. Not used for plugin objects. | |
1288 | ||
1289 | template<int size, bool big_endian> | |
1290 | unsigned int | |
1291 | Sized_pluginobj<size, big_endian>::do_section_info(unsigned int) | |
1292 | { | |
1293 | gold_unreachable(); | |
1294 | return 0; | |
1295 | } | |
1296 | ||
1297 | // Return the section alignment. Not used for plugin objects. | |
1298 | ||
1299 | template<int size, bool big_endian> | |
1300 | uint64_t | |
1301 | Sized_pluginobj<size, big_endian>::do_section_addralign(unsigned int) | |
1302 | { | |
1303 | gold_unreachable(); | |
1304 | return 0; | |
1305 | } | |
1306 | ||
1307 | // Return the Xindex structure to use. Not used for plugin objects. | |
1308 | ||
1309 | template<int size, bool big_endian> | |
1310 | Xindex* | |
1311 | Sized_pluginobj<size, big_endian>::do_initialize_xindex() | |
1312 | { | |
1313 | gold_unreachable(); | |
1314 | return NULL; | |
1315 | } | |
1316 | ||
53bbcc1b CC |
1317 | // Get symbol counts. Don't count plugin objects; the replacement |
1318 | // files will provide the counts. | |
89fc3421 CC |
1319 | |
1320 | template<int size, bool big_endian> | |
1321 | void | |
53bbcc1b CC |
1322 | Sized_pluginobj<size, big_endian>::do_get_global_symbol_counts( |
1323 | const Symbol_table*, | |
1324 | size_t* defined, | |
1325 | size_t* used) const | |
89fc3421 | 1326 | { |
53bbcc1b CC |
1327 | *defined = 0; |
1328 | *used = 0; | |
89fc3421 CC |
1329 | } |
1330 | ||
dde3f402 ILT |
1331 | // Get symbols. Not used for plugin objects. |
1332 | ||
1333 | template<int size, bool big_endian> | |
1334 | const Object::Symbols* | |
1335 | Sized_pluginobj<size, big_endian>::do_get_global_symbols() const | |
1336 | { | |
1337 | gold_unreachable(); | |
1338 | } | |
1339 | ||
5995b570 | 1340 | // Class Plugin_finish. This task runs after all replacement files have |
78384e8f CC |
1341 | // been added. For now, it's a placeholder for a possible plugin API |
1342 | // to allow the plugin to release most of its resources. The cleanup | |
1343 | // handlers must be called later, because they can remove the temporary | |
1344 | // object files that are needed until the end of the link. | |
89fc3421 | 1345 | |
5995b570 | 1346 | class Plugin_finish : public Task |
89fc3421 CC |
1347 | { |
1348 | public: | |
5995b570 | 1349 | Plugin_finish(Task_token* this_blocker, Task_token* next_blocker) |
89fc3421 CC |
1350 | : this_blocker_(this_blocker), next_blocker_(next_blocker) |
1351 | { } | |
1352 | ||
5995b570 | 1353 | ~Plugin_finish() |
89fc3421 CC |
1354 | { |
1355 | if (this->this_blocker_ != NULL) | |
1356 | delete this->this_blocker_; | |
1357 | } | |
1358 | ||
1359 | Task_token* | |
1360 | is_runnable() | |
1361 | { | |
1362 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
1363 | return this->this_blocker_; | |
1364 | return NULL; | |
1365 | } | |
1366 | ||
1367 | void | |
1368 | locks(Task_locker* tl) | |
1369 | { tl->add(this, this->next_blocker_); } | |
1370 | ||
1371 | void | |
1372 | run(Workqueue*) | |
483620e8 | 1373 | { |
78384e8f | 1374 | // We could call early cleanup handlers here. |
483620e8 | 1375 | } |
89fc3421 CC |
1376 | |
1377 | std::string | |
1378 | get_name() const | |
5995b570 | 1379 | { return "Plugin_finish"; } |
89fc3421 CC |
1380 | |
1381 | private: | |
1382 | Task_token* this_blocker_; | |
1383 | Task_token* next_blocker_; | |
1384 | }; | |
1385 | ||
1386 | // Class Plugin_hook. | |
1387 | ||
1388 | Plugin_hook::~Plugin_hook() | |
1389 | { | |
1390 | } | |
1391 | ||
1392 | // Return whether a Plugin_hook task is runnable. | |
1393 | ||
1394 | Task_token* | |
1395 | Plugin_hook::is_runnable() | |
1396 | { | |
1397 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
1398 | return this->this_blocker_; | |
1399 | return NULL; | |
1400 | } | |
1401 | ||
1402 | // Return a Task_locker for a Plugin_hook task. We don't need any | |
1403 | // locks here. | |
1404 | ||
1405 | void | |
1406 | Plugin_hook::locks(Task_locker*) | |
1407 | { | |
1408 | } | |
1409 | ||
89fc3421 CC |
1410 | // Run the "all symbols read" plugin hook. |
1411 | ||
1412 | void | |
5995b570 | 1413 | Plugin_hook::run(Workqueue* workqueue) |
89fc3421 CC |
1414 | { |
1415 | gold_assert(this->options_.has_plugins()); | |
a10ae760 | 1416 | Symbol* start_sym = this->symtab_->lookup(parameters->entry()); |
91ff43fe RÁE |
1417 | if (start_sym != NULL) |
1418 | start_sym->set_in_real_elf(); | |
1419 | ||
89fc3421 | 1420 | this->options_.plugins()->all_symbols_read(workqueue, |
0f7c0701 | 1421 | this, |
89fc3421 CC |
1422 | this->input_objects_, |
1423 | this->symtab_, | |
89fc3421 CC |
1424 | this->dirpath_, |
1425 | this->mapfile_, | |
1426 | &this->this_blocker_); | |
5995b570 CC |
1427 | workqueue->queue_soon(new Plugin_finish(this->this_blocker_, |
1428 | this->next_blocker_)); | |
89fc3421 CC |
1429 | } |
1430 | ||
1431 | // The C interface routines called by the plugins. | |
1432 | ||
1433 | #ifdef ENABLE_PLUGINS | |
1434 | ||
1435 | // Register a claim-file handler. | |
1436 | ||
1437 | static enum ld_plugin_status | |
1438 | register_claim_file(ld_plugin_claim_file_handler handler) | |
1439 | { | |
1440 | gold_assert(parameters->options().has_plugins()); | |
1441 | parameters->options().plugins()->set_claim_file_handler(handler); | |
1442 | return LDPS_OK; | |
1443 | } | |
1444 | ||
1445 | // Register an all-symbols-read handler. | |
1446 | ||
1447 | static enum ld_plugin_status | |
1448 | register_all_symbols_read(ld_plugin_all_symbols_read_handler handler) | |
1449 | { | |
1450 | gold_assert(parameters->options().has_plugins()); | |
1451 | parameters->options().plugins()->set_all_symbols_read_handler(handler); | |
1452 | return LDPS_OK; | |
1453 | } | |
1454 | ||
1455 | // Register a cleanup handler. | |
1456 | ||
1457 | static enum ld_plugin_status | |
1458 | register_cleanup(ld_plugin_cleanup_handler handler) | |
1459 | { | |
1460 | gold_assert(parameters->options().has_plugins()); | |
1461 | parameters->options().plugins()->set_cleanup_handler(handler); | |
1462 | return LDPS_OK; | |
1463 | } | |
1464 | ||
1465 | // Add symbols from a plugin-claimed input file. | |
1466 | ||
1467 | static enum ld_plugin_status | |
ca09d69a | 1468 | add_symbols(void* handle, int nsyms, const ld_plugin_symbol* syms) |
89fc3421 CC |
1469 | { |
1470 | gold_assert(parameters->options().has_plugins()); | |
1471 | Pluginobj* obj = parameters->options().plugins()->make_plugin_object( | |
1472 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
1473 | if (obj == NULL) | |
1474 | return LDPS_ERR; | |
1475 | obj->store_incoming_symbols(nsyms, syms); | |
1476 | return LDPS_OK; | |
1477 | } | |
1478 | ||
0f7c0701 CC |
1479 | // Get the input file information with an open (possibly re-opened) |
1480 | // file descriptor. | |
1481 | ||
1482 | static enum ld_plugin_status | |
ca09d69a | 1483 | get_input_file(const void* handle, struct ld_plugin_input_file* file) |
0f7c0701 CC |
1484 | { |
1485 | gold_assert(parameters->options().has_plugins()); | |
1486 | unsigned int obj_index = | |
1487 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
1488 | return parameters->options().plugins()->get_input_file(obj_index, file); | |
1489 | } | |
1490 | ||
1491 | // Release the input file. | |
1492 | ||
1493 | static enum ld_plugin_status | |
ca09d69a | 1494 | release_input_file(const void* handle) |
0f7c0701 CC |
1495 | { |
1496 | gold_assert(parameters->options().has_plugins()); | |
1497 | unsigned int obj_index = | |
1498 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
1499 | return parameters->options().plugins()->release_input_file(obj_index); | |
1500 | } | |
1501 | ||
9c793f14 RÁE |
1502 | static enum ld_plugin_status |
1503 | get_view(const void *handle, const void **viewp) | |
1504 | { | |
1505 | gold_assert(parameters->options().has_plugins()); | |
1506 | unsigned int obj_index = | |
1507 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
1508 | return parameters->options().plugins()->get_view(obj_index, viewp); | |
1509 | } | |
1510 | ||
89fc3421 CC |
1511 | // Get the symbol resolution info for a plugin-claimed input file. |
1512 | ||
1513 | static enum ld_plugin_status | |
ca09d69a | 1514 | get_symbols(const void* handle, int nsyms, ld_plugin_symbol* syms) |
89fc3421 CC |
1515 | { |
1516 | gold_assert(parameters->options().has_plugins()); | |
3c537f7f PC |
1517 | Plugin_manager* plugins = parameters->options().plugins(); |
1518 | Object* obj = plugins->object( | |
e9552f7e | 1519 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); |
89fc3421 CC |
1520 | if (obj == NULL) |
1521 | return LDPS_ERR; | |
e9552f7e ST |
1522 | Pluginobj* plugin_obj = obj->pluginobj(); |
1523 | if (plugin_obj == NULL) | |
1524 | return LDPS_ERR; | |
3c537f7f PC |
1525 | Symbol_table* symtab = plugins->symtab(); |
1526 | return plugin_obj->get_symbol_resolution_info(symtab, nsyms, syms, 1); | |
235061c2 CC |
1527 | } |
1528 | ||
1529 | // Version 2 of the above. The only difference is that this version | |
1530 | // is allowed to return the resolution code LDPR_PREVAILING_DEF_IRONLY_EXP. | |
1531 | ||
1532 | static enum ld_plugin_status | |
1533 | get_symbols_v2(const void* handle, int nsyms, ld_plugin_symbol* syms) | |
1534 | { | |
1535 | gold_assert(parameters->options().has_plugins()); | |
3c537f7f PC |
1536 | Plugin_manager* plugins = parameters->options().plugins(); |
1537 | Object* obj = plugins->object( | |
235061c2 CC |
1538 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); |
1539 | if (obj == NULL) | |
1540 | return LDPS_ERR; | |
1541 | Pluginobj* plugin_obj = obj->pluginobj(); | |
1542 | if (plugin_obj == NULL) | |
1543 | return LDPS_ERR; | |
3c537f7f PC |
1544 | Symbol_table* symtab = plugins->symtab(); |
1545 | return plugin_obj->get_symbol_resolution_info(symtab, nsyms, syms, 2); | |
89fc3421 CC |
1546 | } |
1547 | ||
1548 | // Add a new (real) input file generated by a plugin. | |
1549 | ||
1550 | static enum ld_plugin_status | |
ca09d69a | 1551 | add_input_file(const char* pathname) |
89fc3421 CC |
1552 | { |
1553 | gold_assert(parameters->options().has_plugins()); | |
e99daf92 ILT |
1554 | return parameters->options().plugins()->add_input_file(pathname, false); |
1555 | } | |
1556 | ||
1557 | // Add a new (real) library required by a plugin. | |
1558 | ||
1559 | static enum ld_plugin_status | |
ca09d69a | 1560 | add_input_library(const char* pathname) |
e99daf92 ILT |
1561 | { |
1562 | gold_assert(parameters->options().has_plugins()); | |
1563 | return parameters->options().plugins()->add_input_file(pathname, true); | |
89fc3421 CC |
1564 | } |
1565 | ||
42218b9f RÁE |
1566 | // Set the extra library path to be used by libraries added via |
1567 | // add_input_library | |
1568 | ||
1569 | static enum ld_plugin_status | |
ca09d69a | 1570 | set_extra_library_path(const char* path) |
42218b9f RÁE |
1571 | { |
1572 | gold_assert(parameters->options().has_plugins()); | |
1573 | return parameters->options().plugins()->set_extra_library_path(path); | |
1574 | } | |
1575 | ||
89fc3421 CC |
1576 | // Issue a diagnostic message from a plugin. |
1577 | ||
1578 | static enum ld_plugin_status | |
ca09d69a | 1579 | message(int level, const char* format, ...) |
89fc3421 CC |
1580 | { |
1581 | va_list args; | |
1582 | va_start(args, format); | |
1583 | ||
1584 | switch (level) | |
1585 | { | |
1586 | case LDPL_INFO: | |
1587 | parameters->errors()->info(format, args); | |
1588 | break; | |
1589 | case LDPL_WARNING: | |
1590 | parameters->errors()->warning(format, args); | |
1591 | break; | |
1592 | case LDPL_ERROR: | |
1593 | default: | |
1594 | parameters->errors()->error(format, args); | |
1595 | break; | |
1596 | case LDPL_FATAL: | |
1597 | parameters->errors()->fatal(format, args); | |
1598 | break; | |
1599 | } | |
1600 | ||
1601 | va_end(args); | |
1602 | return LDPS_OK; | |
1603 | } | |
1604 | ||
e9552f7e ST |
1605 | // Get the section count of the object corresponding to the handle. This |
1606 | // plugin interface can only be called in the claim_file handler of the plugin. | |
1607 | ||
1608 | static enum ld_plugin_status | |
1609 | get_input_section_count(const void* handle, unsigned int* count) | |
1610 | { | |
1611 | gold_assert(parameters->options().has_plugins()); | |
1612 | ||
1613 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1614 | return LDPS_ERR; | |
1615 | ||
1616 | Object* obj = parameters->options().plugins()->get_elf_object(handle); | |
1617 | ||
1618 | if (obj == NULL) | |
1619 | return LDPS_ERR; | |
1620 | ||
1621 | *count = obj->shnum(); | |
1622 | return LDPS_OK; | |
1623 | } | |
1624 | ||
1625 | // Get the type of the specified section in the object corresponding | |
1626 | // to the handle. This plugin interface can only be called in the | |
1627 | // claim_file handler of the plugin. | |
1628 | ||
1629 | static enum ld_plugin_status | |
1630 | get_input_section_type(const struct ld_plugin_section section, | |
1631 | unsigned int* type) | |
1632 | { | |
1633 | gold_assert(parameters->options().has_plugins()); | |
1634 | ||
1635 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1636 | return LDPS_ERR; | |
1637 | ||
1638 | Object* obj | |
1639 | = parameters->options().plugins()->get_elf_object(section.handle); | |
1640 | ||
1641 | if (obj == NULL) | |
1642 | return LDPS_BAD_HANDLE; | |
1643 | ||
1644 | *type = obj->section_type(section.shndx); | |
1645 | return LDPS_OK; | |
1646 | } | |
1647 | ||
1648 | // Get the name of the specified section in the object corresponding | |
1649 | // to the handle. This plugin interface can only be called in the | |
1650 | // claim_file handler of the plugin. | |
1651 | ||
1652 | static enum ld_plugin_status | |
1653 | get_input_section_name(const struct ld_plugin_section section, | |
1654 | char** section_name_ptr) | |
1655 | { | |
1656 | gold_assert(parameters->options().has_plugins()); | |
1657 | ||
1658 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1659 | return LDPS_ERR; | |
1660 | ||
1661 | Object* obj | |
1662 | = parameters->options().plugins()->get_elf_object(section.handle); | |
1663 | ||
1664 | if (obj == NULL) | |
1665 | return LDPS_BAD_HANDLE; | |
1666 | ||
1667 | // Check if the object is locked before getting the section name. | |
1668 | gold_assert(obj->is_locked()); | |
1669 | ||
1670 | const std::string section_name = obj->section_name(section.shndx); | |
1671 | *section_name_ptr = static_cast<char*>(malloc(section_name.length() + 1)); | |
1672 | memcpy(*section_name_ptr, section_name.c_str(), section_name.length() + 1); | |
1673 | return LDPS_OK; | |
1674 | } | |
1675 | ||
1676 | // Get the contents of the specified section in the object corresponding | |
1677 | // to the handle. This plugin interface can only be called in the | |
1678 | // claim_file handler of the plugin. | |
1679 | ||
1680 | static enum ld_plugin_status | |
1681 | get_input_section_contents(const struct ld_plugin_section section, | |
1682 | const unsigned char** section_contents_ptr, | |
1683 | size_t* len) | |
1684 | { | |
1685 | gold_assert(parameters->options().has_plugins()); | |
1686 | ||
1687 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1688 | return LDPS_ERR; | |
1689 | ||
1690 | Object* obj | |
1691 | = parameters->options().plugins()->get_elf_object(section.handle); | |
1692 | ||
1693 | if (obj == NULL) | |
1694 | return LDPS_BAD_HANDLE; | |
1695 | ||
1696 | // Check if the object is locked before getting the section contents. | |
1697 | gold_assert(obj->is_locked()); | |
1698 | ||
1699 | section_size_type plen; | |
1700 | *section_contents_ptr | |
1701 | = obj->section_contents(section.shndx, &plen, false); | |
1702 | *len = plen; | |
1703 | return LDPS_OK; | |
1704 | } | |
1705 | ||
1706 | // Specify the ordering of sections in the final layout. The sections are | |
1707 | // specified as (handle,shndx) pairs in the two arrays in the order in | |
1708 | // which they should appear in the final layout. | |
1709 | ||
1710 | static enum ld_plugin_status | |
f0558624 | 1711 | update_section_order(const struct ld_plugin_section* section_list, |
e9552f7e ST |
1712 | unsigned int num_sections) |
1713 | { | |
1714 | gold_assert(parameters->options().has_plugins()); | |
1715 | ||
1716 | if (num_sections == 0) | |
1717 | return LDPS_OK; | |
1718 | ||
1719 | if (section_list == NULL) | |
1720 | return LDPS_ERR; | |
1721 | ||
f0558624 ST |
1722 | Layout* layout = parameters->options().plugins()->layout(); |
1723 | gold_assert (layout != NULL); | |
e9552f7e | 1724 | |
f0558624 ST |
1725 | std::map<Section_id, unsigned int>* order_map |
1726 | = layout->get_section_order_map(); | |
1727 | ||
1728 | /* Store the mapping from Section_id to section position in layout's | |
1729 | order_map to consult after output sections are added. */ | |
e9552f7e ST |
1730 | for (unsigned int i = 0; i < num_sections; ++i) |
1731 | { | |
1732 | Object* obj = parameters->options().plugins()->get_elf_object( | |
1733 | section_list[i].handle); | |
1734 | if (obj == NULL) | |
1735 | return LDPS_BAD_HANDLE; | |
1736 | unsigned int shndx = section_list[i].shndx; | |
1737 | Section_id secn_id(obj, shndx); | |
f0558624 | 1738 | (*order_map)[secn_id] = i + 1; |
e9552f7e ST |
1739 | } |
1740 | ||
e9552f7e ST |
1741 | return LDPS_OK; |
1742 | } | |
1743 | ||
1744 | // Let the linker know that the sections could be reordered. | |
1745 | ||
1746 | static enum ld_plugin_status | |
1747 | allow_section_ordering() | |
1748 | { | |
1749 | gold_assert(parameters->options().has_plugins()); | |
1750 | Layout* layout = parameters->options().plugins()->layout(); | |
1751 | layout->set_section_ordering_specified(); | |
1752 | return LDPS_OK; | |
1753 | } | |
1754 | ||
16164a6b ST |
1755 | // Let the linker know that a subset of sections could be mapped |
1756 | // to a unique segment. | |
1757 | ||
1758 | static enum ld_plugin_status | |
1759 | allow_unique_segment_for_sections() | |
1760 | { | |
1761 | gold_assert(parameters->options().has_plugins()); | |
1762 | Layout* layout = parameters->options().plugins()->layout(); | |
1763 | layout->set_unique_segment_for_sections_specified(); | |
1764 | return LDPS_OK; | |
1765 | } | |
1766 | ||
1767 | // This function should map the list of sections specified in the | |
1768 | // SECTION_LIST to a unique segment. ELF segments do not have names | |
1769 | // and the NAME is used to identify Output Section which should contain | |
1770 | // the list of sections. This Output Section will then be mapped to | |
1771 | // a unique segment. FLAGS is used to specify if any additional segment | |
1772 | // flags need to be set. For instance, a specific segment flag can be | |
1773 | // set to identify this segment. Unsetting segment flags is not possible. | |
1774 | // ALIGN specifies the alignment of the segment. | |
1775 | ||
1776 | static enum ld_plugin_status | |
1777 | unique_segment_for_sections(const char* segment_name, | |
1778 | uint64_t flags, | |
1779 | uint64_t align, | |
1780 | const struct ld_plugin_section* section_list, | |
1781 | unsigned int num_sections) | |
1782 | { | |
1783 | gold_assert(parameters->options().has_plugins()); | |
1784 | ||
1785 | if (num_sections == 0) | |
1786 | return LDPS_OK; | |
1787 | ||
1788 | if (section_list == NULL) | |
1789 | return LDPS_ERR; | |
1790 | ||
1791 | Layout* layout = parameters->options().plugins()->layout(); | |
1792 | gold_assert (layout != NULL); | |
1793 | ||
1794 | Layout::Unique_segment_info* s = new Layout::Unique_segment_info; | |
1795 | s->name = segment_name; | |
1796 | s->flags = flags; | |
1797 | s->align = align; | |
1798 | ||
1799 | for (unsigned int i = 0; i < num_sections; ++i) | |
1800 | { | |
1801 | Object* obj = parameters->options().plugins()->get_elf_object( | |
1802 | section_list[i].handle); | |
1803 | if (obj == NULL) | |
1804 | return LDPS_BAD_HANDLE; | |
1805 | unsigned int shndx = section_list[i].shndx; | |
1806 | Const_section_id secn_id(obj, shndx); | |
1807 | layout->insert_section_segment_map(secn_id, s); | |
1808 | } | |
1809 | ||
1810 | return LDPS_OK; | |
1811 | } | |
1812 | ||
89fc3421 CC |
1813 | #endif // ENABLE_PLUGINS |
1814 | ||
1815 | // Allocate a Pluginobj object of the appropriate size and endianness. | |
1816 | ||
1817 | static Pluginobj* | |
0f7c0701 | 1818 | make_sized_plugin_object(Input_file* input_file, off_t offset, off_t filesize) |
89fc3421 | 1819 | { |
89fc3421 CC |
1820 | Pluginobj* obj = NULL; |
1821 | ||
029ba973 ILT |
1822 | parameters_force_valid_target(); |
1823 | const Target& target(parameters->target()); | |
89fc3421 | 1824 | |
029ba973 | 1825 | if (target.get_size() == 32) |
89fc3421 | 1826 | { |
029ba973 | 1827 | if (target.is_big_endian()) |
92f03fcb | 1828 | #ifdef HAVE_TARGET_32_BIG |
89fc3421 | 1829 | obj = new Sized_pluginobj<32, true>(input_file->filename(), |
0f7c0701 | 1830 | input_file, offset, filesize); |
92f03fcb CC |
1831 | #else |
1832 | gold_error(_("%s: not configured to support " | |
1833 | "32-bit big-endian object"), | |
1834 | input_file->filename().c_str()); | |
89fc3421 | 1835 | #endif |
89fc3421 | 1836 | else |
92f03fcb | 1837 | #ifdef HAVE_TARGET_32_LITTLE |
89fc3421 | 1838 | obj = new Sized_pluginobj<32, false>(input_file->filename(), |
0f7c0701 | 1839 | input_file, offset, filesize); |
92f03fcb CC |
1840 | #else |
1841 | gold_error(_("%s: not configured to support " | |
1842 | "32-bit little-endian object"), | |
1843 | input_file->filename().c_str()); | |
89fc3421 CC |
1844 | #endif |
1845 | } | |
029ba973 | 1846 | else if (target.get_size() == 64) |
89fc3421 | 1847 | { |
029ba973 | 1848 | if (target.is_big_endian()) |
92f03fcb | 1849 | #ifdef HAVE_TARGET_64_BIG |
89fc3421 | 1850 | obj = new Sized_pluginobj<64, true>(input_file->filename(), |
0f7c0701 | 1851 | input_file, offset, filesize); |
92f03fcb CC |
1852 | #else |
1853 | gold_error(_("%s: not configured to support " | |
1854 | "64-bit big-endian object"), | |
1855 | input_file->filename().c_str()); | |
89fc3421 | 1856 | #endif |
89fc3421 | 1857 | else |
92f03fcb | 1858 | #ifdef HAVE_TARGET_64_LITTLE |
89fc3421 | 1859 | obj = new Sized_pluginobj<64, false>(input_file->filename(), |
0f7c0701 | 1860 | input_file, offset, filesize); |
92f03fcb CC |
1861 | #else |
1862 | gold_error(_("%s: not configured to support " | |
1863 | "64-bit little-endian object"), | |
1864 | input_file->filename().c_str()); | |
89fc3421 CC |
1865 | #endif |
1866 | } | |
1867 | ||
1868 | gold_assert(obj != NULL); | |
89fc3421 CC |
1869 | return obj; |
1870 | } | |
1871 | ||
1872 | } // End namespace gold. |