]>
Commit | Line | Data |
---|---|---|
6d03d481 | 1 | // plugin.cc -- plugin manager for gold -*- C++ -*- |
89fc3421 | 2 | |
219d1afa | 3 | // Copyright (C) 2008-2018 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 | ||
95ecdfbf ES |
114 | static enum ld_plugin_status |
115 | get_symbols_v3(const void *handle, int nsyms, struct ld_plugin_symbol *syms); | |
116 | ||
89fc3421 | 117 | static enum ld_plugin_status |
6508b958 | 118 | add_input_file(const char *pathname); |
89fc3421 | 119 | |
e99daf92 | 120 | static enum ld_plugin_status |
6508b958 | 121 | add_input_library(const char *pathname); |
e99daf92 | 122 | |
42218b9f RÁE |
123 | static enum ld_plugin_status |
124 | set_extra_library_path(const char *path); | |
125 | ||
89fc3421 | 126 | static enum ld_plugin_status |
6c52134c | 127 | message(int level, const char *format, ...); |
89fc3421 | 128 | |
e9552f7e ST |
129 | static enum ld_plugin_status |
130 | get_input_section_count(const void* handle, unsigned int* count); | |
131 | ||
132 | static enum ld_plugin_status | |
133 | get_input_section_type(const struct ld_plugin_section section, | |
134 | unsigned int* type); | |
135 | ||
136 | static enum ld_plugin_status | |
137 | get_input_section_name(const struct ld_plugin_section section, | |
138 | char** section_name_ptr); | |
139 | ||
140 | static enum ld_plugin_status | |
141 | get_input_section_contents(const struct ld_plugin_section section, | |
142 | const unsigned char** section_contents, | |
143 | size_t* len); | |
144 | ||
145 | static enum ld_plugin_status | |
146 | update_section_order(const struct ld_plugin_section *section_list, | |
147 | unsigned int num_sections); | |
148 | ||
149 | static enum ld_plugin_status | |
150 | allow_section_ordering(); | |
151 | ||
16164a6b ST |
152 | static enum ld_plugin_status |
153 | allow_unique_segment_for_sections(); | |
154 | ||
155 | static enum ld_plugin_status | |
156 | unique_segment_for_sections(const char* segment_name, | |
157 | uint64_t flags, | |
158 | uint64_t align, | |
159 | const struct ld_plugin_section *section_list, | |
160 | unsigned int num_sections); | |
82838bd6 CC |
161 | |
162 | static enum ld_plugin_status | |
163 | get_input_section_alignment(const struct ld_plugin_section section, | |
164 | unsigned int* addralign); | |
165 | ||
166 | static enum ld_plugin_status | |
167 | get_input_section_size(const struct ld_plugin_section section, | |
168 | uint64_t* secsize); | |
169 | ||
c4e64843 SC |
170 | static enum ld_plugin_status |
171 | register_new_input(ld_plugin_new_input_handler handler); | |
172 | ||
89fc3421 CC |
173 | }; |
174 | ||
175 | #endif // ENABLE_PLUGINS | |
176 | ||
177 | static Pluginobj* make_sized_plugin_object(Input_file* input_file, | |
0f7c0701 | 178 | off_t offset, off_t filesize); |
89fc3421 CC |
179 | |
180 | // Plugin methods. | |
181 | ||
182 | // Load one plugin library. | |
183 | ||
184 | void | |
185 | Plugin::load() | |
186 | { | |
187 | #ifdef ENABLE_PLUGINS | |
89fc3421 CC |
188 | // Load the plugin library. |
189 | // FIXME: Look for the library in standard locations. | |
4674ecfc | 190 | this->handle_ = dlopen(this->filename_.c_str(), RTLD_NOW); |
89fc3421 CC |
191 | if (this->handle_ == NULL) |
192 | { | |
4802450a RÁE |
193 | gold_error(_("%s: could not load plugin library: %s"), |
194 | this->filename_.c_str(), dlerror()); | |
89fc3421 CC |
195 | return; |
196 | } | |
197 | ||
198 | // Find the plugin's onload entry point. | |
b59befec ILT |
199 | void* ptr = dlsym(this->handle_, "onload"); |
200 | if (ptr == NULL) | |
89fc3421 | 201 | { |
4674ecfc CC |
202 | gold_error(_("%s: could not find onload entry point"), |
203 | this->filename_.c_str()); | |
89fc3421 CC |
204 | return; |
205 | } | |
b59befec ILT |
206 | ld_plugin_onload onload; |
207 | gold_assert(sizeof(onload) == sizeof(ptr)); | |
208 | memcpy(&onload, &ptr, sizeof(ptr)); | |
89fc3421 CC |
209 | |
210 | // Get the linker's version number. | |
211 | const char* ver = get_version_string(); | |
212 | int major = 0; | |
213 | int minor = 0; | |
214 | sscanf(ver, "%d.%d", &major, &minor); | |
215 | ||
216 | // Allocate and populate a transfer vector. | |
c4e64843 | 217 | const int tv_fixed_size = 30; |
e9552f7e | 218 | |
4674ecfc | 219 | int tv_size = this->args_.size() + tv_fixed_size; |
ca09d69a | 220 | ld_plugin_tv* tv = new ld_plugin_tv[tv_size]; |
89fc3421 | 221 | |
abc8dcba CC |
222 | // Put LDPT_MESSAGE at the front of the list so the plugin can use it |
223 | // while processing subsequent entries. | |
89fc3421 | 224 | int i = 0; |
abc8dcba CC |
225 | tv[i].tv_tag = LDPT_MESSAGE; |
226 | tv[i].tv_u.tv_message = message; | |
227 | ||
228 | ++i; | |
89fc3421 CC |
229 | tv[i].tv_tag = LDPT_API_VERSION; |
230 | tv[i].tv_u.tv_val = LD_PLUGIN_API_VERSION; | |
231 | ||
232 | ++i; | |
233 | tv[i].tv_tag = LDPT_GOLD_VERSION; | |
234 | tv[i].tv_u.tv_val = major * 100 + minor; | |
235 | ||
236 | ++i; | |
237 | tv[i].tv_tag = LDPT_LINKER_OUTPUT; | |
238 | if (parameters->options().relocatable()) | |
239 | tv[i].tv_u.tv_val = LDPO_REL; | |
240 | else if (parameters->options().shared()) | |
241 | tv[i].tv_u.tv_val = LDPO_DYN; | |
370e30b6 RÁE |
242 | else if (parameters->options().pie()) |
243 | tv[i].tv_u.tv_val = LDPO_PIE; | |
89fc3421 CC |
244 | else |
245 | tv[i].tv_u.tv_val = LDPO_EXEC; | |
246 | ||
3537c84b RÁE |
247 | ++i; |
248 | tv[i].tv_tag = LDPT_OUTPUT_NAME; | |
249 | tv[i].tv_u.tv_string = parameters->options().output(); | |
250 | ||
4674ecfc | 251 | for (unsigned int j = 0; j < this->args_.size(); ++j) |
89fc3421 CC |
252 | { |
253 | ++i; | |
254 | tv[i].tv_tag = LDPT_OPTION; | |
4674ecfc | 255 | tv[i].tv_u.tv_string = this->args_[j].c_str(); |
89fc3421 CC |
256 | } |
257 | ||
258 | ++i; | |
259 | tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK; | |
260 | tv[i].tv_u.tv_register_claim_file = register_claim_file; | |
261 | ||
262 | ++i; | |
263 | tv[i].tv_tag = LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK; | |
264 | tv[i].tv_u.tv_register_all_symbols_read = register_all_symbols_read; | |
265 | ||
266 | ++i; | |
267 | tv[i].tv_tag = LDPT_REGISTER_CLEANUP_HOOK; | |
268 | tv[i].tv_u.tv_register_cleanup = register_cleanup; | |
269 | ||
270 | ++i; | |
271 | tv[i].tv_tag = LDPT_ADD_SYMBOLS; | |
272 | tv[i].tv_u.tv_add_symbols = add_symbols; | |
273 | ||
0f7c0701 CC |
274 | ++i; |
275 | tv[i].tv_tag = LDPT_GET_INPUT_FILE; | |
276 | tv[i].tv_u.tv_get_input_file = get_input_file; | |
277 | ||
9c793f14 RÁE |
278 | ++i; |
279 | tv[i].tv_tag = LDPT_GET_VIEW; | |
280 | tv[i].tv_u.tv_get_view = get_view; | |
281 | ||
0f7c0701 CC |
282 | ++i; |
283 | tv[i].tv_tag = LDPT_RELEASE_INPUT_FILE; | |
284 | tv[i].tv_u.tv_release_input_file = release_input_file; | |
285 | ||
89fc3421 CC |
286 | ++i; |
287 | tv[i].tv_tag = LDPT_GET_SYMBOLS; | |
288 | tv[i].tv_u.tv_get_symbols = get_symbols; | |
289 | ||
235061c2 CC |
290 | ++i; |
291 | tv[i].tv_tag = LDPT_GET_SYMBOLS_V2; | |
292 | tv[i].tv_u.tv_get_symbols = get_symbols_v2; | |
293 | ||
95ecdfbf ES |
294 | ++i; |
295 | tv[i].tv_tag = LDPT_GET_SYMBOLS_V3; | |
296 | tv[i].tv_u.tv_get_symbols = get_symbols_v3; | |
297 | ||
89fc3421 CC |
298 | ++i; |
299 | tv[i].tv_tag = LDPT_ADD_INPUT_FILE; | |
300 | tv[i].tv_u.tv_add_input_file = add_input_file; | |
301 | ||
e99daf92 ILT |
302 | ++i; |
303 | tv[i].tv_tag = LDPT_ADD_INPUT_LIBRARY; | |
304 | tv[i].tv_u.tv_add_input_library = add_input_library; | |
305 | ||
42218b9f RÁE |
306 | ++i; |
307 | tv[i].tv_tag = LDPT_SET_EXTRA_LIBRARY_PATH; | |
308 | tv[i].tv_u.tv_set_extra_library_path = set_extra_library_path; | |
309 | ||
e9552f7e ST |
310 | ++i; |
311 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_COUNT; | |
312 | tv[i].tv_u.tv_get_input_section_count = get_input_section_count; | |
313 | ||
314 | ++i; | |
315 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_TYPE; | |
316 | tv[i].tv_u.tv_get_input_section_type = get_input_section_type; | |
317 | ||
318 | ++i; | |
319 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_NAME; | |
320 | tv[i].tv_u.tv_get_input_section_name = get_input_section_name; | |
321 | ||
322 | ++i; | |
323 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_CONTENTS; | |
324 | tv[i].tv_u.tv_get_input_section_contents = get_input_section_contents; | |
325 | ||
326 | ++i; | |
327 | tv[i].tv_tag = LDPT_UPDATE_SECTION_ORDER; | |
328 | tv[i].tv_u.tv_update_section_order = update_section_order; | |
329 | ||
330 | ++i; | |
331 | tv[i].tv_tag = LDPT_ALLOW_SECTION_ORDERING; | |
332 | tv[i].tv_u.tv_allow_section_ordering = allow_section_ordering; | |
333 | ||
16164a6b ST |
334 | ++i; |
335 | tv[i].tv_tag = LDPT_ALLOW_UNIQUE_SEGMENT_FOR_SECTIONS; | |
336 | tv[i].tv_u.tv_allow_unique_segment_for_sections | |
337 | = allow_unique_segment_for_sections; | |
338 | ||
339 | ++i; | |
340 | tv[i].tv_tag = LDPT_UNIQUE_SEGMENT_FOR_SECTIONS; | |
341 | tv[i].tv_u.tv_unique_segment_for_sections = unique_segment_for_sections; | |
342 | ||
82838bd6 CC |
343 | ++i; |
344 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_ALIGNMENT; | |
345 | tv[i].tv_u.tv_get_input_section_alignment = get_input_section_alignment; | |
346 | ||
347 | ++i; | |
348 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_SIZE; | |
349 | tv[i].tv_u.tv_get_input_section_size = get_input_section_size; | |
350 | ||
c4e64843 SC |
351 | ++i; |
352 | tv[i].tv_tag = LDPT_REGISTER_NEW_INPUT_HOOK; | |
353 | tv[i].tv_u.tv_register_new_input = register_new_input; | |
354 | ||
89fc3421 CC |
355 | ++i; |
356 | tv[i].tv_tag = LDPT_NULL; | |
357 | tv[i].tv_u.tv_val = 0; | |
358 | ||
359 | gold_assert(i == tv_size - 1); | |
360 | ||
361 | // Call the onload entry point. | |
362 | (*onload)(tv); | |
363 | ||
6c52134c | 364 | delete[] tv; |
89fc3421 CC |
365 | #endif // ENABLE_PLUGINS |
366 | } | |
367 | ||
368 | // Call the plugin claim-file handler. | |
369 | ||
370 | inline bool | |
ca09d69a | 371 | Plugin::claim_file(struct ld_plugin_input_file* plugin_input_file) |
89fc3421 CC |
372 | { |
373 | int claimed = 0; | |
374 | ||
375 | if (this->claim_file_handler_ != NULL) | |
376 | { | |
377 | (*this->claim_file_handler_)(plugin_input_file, &claimed); | |
378 | if (claimed) | |
379 | return true; | |
380 | } | |
381 | return false; | |
382 | } | |
383 | ||
384 | // Call the all-symbols-read handler. | |
385 | ||
386 | inline void | |
387 | Plugin::all_symbols_read() | |
388 | { | |
389 | if (this->all_symbols_read_handler_ != NULL) | |
390 | (*this->all_symbols_read_handler_)(); | |
391 | } | |
392 | ||
c4e64843 SC |
393 | // Call the new_input handler. |
394 | ||
395 | inline void | |
396 | Plugin::new_input(struct ld_plugin_input_file* plugin_input_file) | |
397 | { | |
398 | if (this->new_input_handler_ != NULL) | |
399 | (*this->new_input_handler_)(plugin_input_file); | |
400 | } | |
401 | ||
89fc3421 CC |
402 | // Call the cleanup handler. |
403 | ||
404 | inline void | |
405 | Plugin::cleanup() | |
406 | { | |
40f36857 CC |
407 | if (this->cleanup_handler_ != NULL && !this->cleanup_done_) |
408 | { | |
409 | // Set this flag before calling to prevent a recursive plunge | |
410 | // in the event that a plugin's cleanup handler issues a | |
411 | // fatal error. | |
412 | this->cleanup_done_ = true; | |
413 | (*this->cleanup_handler_)(); | |
414 | } | |
89fc3421 CC |
415 | } |
416 | ||
0f3b89d8 ILT |
417 | // This task is used to rescan archives as needed. |
418 | ||
419 | class Plugin_rescan : public Task | |
420 | { | |
421 | public: | |
422 | Plugin_rescan(Task_token* this_blocker, Task_token* next_blocker) | |
423 | : this_blocker_(this_blocker), next_blocker_(next_blocker) | |
424 | { } | |
425 | ||
426 | ~Plugin_rescan() | |
427 | { | |
428 | delete this->this_blocker_; | |
429 | } | |
430 | ||
431 | Task_token* | |
432 | is_runnable() | |
433 | { | |
434 | if (this->this_blocker_->is_blocked()) | |
435 | return this->this_blocker_; | |
436 | return NULL; | |
437 | } | |
438 | ||
439 | void | |
440 | locks(Task_locker* tl) | |
441 | { tl->add(this, this->next_blocker_); } | |
442 | ||
443 | void | |
444 | run(Workqueue*) | |
445 | { parameters->options().plugins()->rescan(this); } | |
446 | ||
447 | std::string | |
448 | get_name() const | |
449 | { return "Plugin_rescan"; } | |
450 | ||
451 | private: | |
452 | Task_token* this_blocker_; | |
453 | Task_token* next_blocker_; | |
454 | }; | |
455 | ||
89fc3421 CC |
456 | // Plugin_manager methods. |
457 | ||
458 | Plugin_manager::~Plugin_manager() | |
459 | { | |
460 | for (Plugin_list::iterator p = this->plugins_.begin(); | |
461 | p != this->plugins_.end(); | |
462 | ++p) | |
463 | delete *p; | |
464 | this->plugins_.clear(); | |
465 | for (Object_list::iterator obj = this->objects_.begin(); | |
466 | obj != this->objects_.end(); | |
467 | ++obj) | |
468 | delete *obj; | |
469 | this->objects_.clear(); | |
d37ffe25 | 470 | delete this->lock_; |
89fc3421 CC |
471 | } |
472 | ||
473 | // Load all plugin libraries. | |
474 | ||
475 | void | |
e9552f7e | 476 | Plugin_manager::load_plugins(Layout* layout) |
89fc3421 | 477 | { |
e9552f7e | 478 | this->layout_ = layout; |
89fc3421 CC |
479 | for (this->current_ = this->plugins_.begin(); |
480 | this->current_ != this->plugins_.end(); | |
481 | ++this->current_) | |
482 | (*this->current_)->load(); | |
483 | } | |
484 | ||
485 | // Call the plugin claim-file handlers in turn to see if any claim the file. | |
486 | ||
487 | Pluginobj* | |
488 | Plugin_manager::claim_file(Input_file* input_file, off_t offset, | |
e9552f7e | 489 | off_t filesize, Object* elf_object) |
89fc3421 | 490 | { |
d37ffe25 ED |
491 | bool lock_initialized = this->initialize_lock_.initialize(); |
492 | ||
493 | gold_assert(lock_initialized); | |
494 | Hold_lock hl(*this->lock_); | |
89fc3421 CC |
495 | |
496 | unsigned int handle = this->objects_.size(); | |
497 | this->input_file_ = input_file; | |
498 | this->plugin_input_file_.name = input_file->filename().c_str(); | |
499 | this->plugin_input_file_.fd = input_file->file().descriptor(); | |
500 | this->plugin_input_file_.offset = offset; | |
501 | this->plugin_input_file_.filesize = filesize; | |
502 | this->plugin_input_file_.handle = reinterpret_cast<void*>(handle); | |
e9552f7e ST |
503 | if (elf_object != NULL) |
504 | this->objects_.push_back(elf_object); | |
505 | this->in_claim_file_handler_ = true; | |
89fc3421 CC |
506 | |
507 | for (this->current_ = this->plugins_.begin(); | |
508 | this->current_ != this->plugins_.end(); | |
509 | ++this->current_) | |
510 | { | |
c4e64843 SC |
511 | // If we aren't yet in replacement phase, allow plugins to claim input |
512 | // files, otherwise notify the plugin of the new input file, if needed. | |
513 | if (!this->in_replacement_phase_) | |
89fc3421 | 514 | { |
c4e64843 SC |
515 | if ((*this->current_)->claim_file(&this->plugin_input_file_)) |
516 | { | |
517 | this->any_claimed_ = true; | |
518 | this->in_claim_file_handler_ = false; | |
519 | ||
520 | if (this->objects_.size() > handle | |
521 | && this->objects_[handle]->pluginobj() != NULL) | |
522 | return this->objects_[handle]->pluginobj(); | |
523 | ||
524 | // If the plugin claimed the file but did not call the | |
525 | // add_symbols callback, we need to create the Pluginobj now. | |
526 | Pluginobj* obj = this->make_plugin_object(handle); | |
527 | return obj; | |
528 | } | |
529 | } | |
530 | else | |
531 | { | |
532 | (*this->current_)->new_input(&this->plugin_input_file_); | |
89fc3421 CC |
533 | } |
534 | } | |
535 | ||
e9552f7e | 536 | this->in_claim_file_handler_ = false; |
89fc3421 CC |
537 | return NULL; |
538 | } | |
539 | ||
0f3b89d8 ILT |
540 | // Save an archive. This is used so that a plugin can add a file |
541 | // which refers to a symbol which was not previously referenced. In | |
542 | // that case we want to pretend that the symbol was referenced before, | |
543 | // and pull in the archive object. | |
544 | ||
545 | void | |
546 | Plugin_manager::save_archive(Archive* archive) | |
547 | { | |
548 | if (this->in_replacement_phase_ || !this->any_claimed_) | |
549 | delete archive; | |
550 | else | |
551 | this->rescannable_.push_back(Rescannable(archive)); | |
552 | } | |
553 | ||
554 | // Save an Input_group. This is like save_archive. | |
555 | ||
556 | void | |
557 | Plugin_manager::save_input_group(Input_group* input_group) | |
558 | { | |
559 | if (this->in_replacement_phase_ || !this->any_claimed_) | |
560 | delete input_group; | |
561 | else | |
562 | this->rescannable_.push_back(Rescannable(input_group)); | |
563 | } | |
564 | ||
89fc3421 CC |
565 | // Call the all-symbols-read handlers. |
566 | ||
567 | void | |
0f7c0701 | 568 | Plugin_manager::all_symbols_read(Workqueue* workqueue, Task* task, |
89fc3421 | 569 | Input_objects* input_objects, |
e9552f7e | 570 | Symbol_table* symtab, |
89fc3421 CC |
571 | Dirsearch* dirpath, Mapfile* mapfile, |
572 | Task_token** last_blocker) | |
573 | { | |
574 | this->in_replacement_phase_ = true; | |
575 | this->workqueue_ = workqueue; | |
0f7c0701 | 576 | this->task_ = task; |
89fc3421 CC |
577 | this->input_objects_ = input_objects; |
578 | this->symtab_ = symtab; | |
89fc3421 CC |
579 | this->dirpath_ = dirpath; |
580 | this->mapfile_ = mapfile; | |
581 | this->this_blocker_ = NULL; | |
582 | ||
3281b315 ST |
583 | // Set symbols used in defsym expressions as seen in real ELF. |
584 | Layout *layout = parameters->options().plugins()->layout(); | |
585 | layout->script_options()->set_defsym_uses_in_real_elf(symtab); | |
586 | layout->script_options()->find_defsym_defs(this->defsym_defines_set_); | |
587 | ||
89fc3421 CC |
588 | for (this->current_ = this->plugins_.begin(); |
589 | this->current_ != this->plugins_.end(); | |
590 | ++this->current_) | |
591 | (*this->current_)->all_symbols_read(); | |
592 | ||
0f3b89d8 ILT |
593 | if (this->any_added_) |
594 | { | |
595 | Task_token* next_blocker = new Task_token(true); | |
596 | next_blocker->add_blocker(); | |
597 | workqueue->queue(new Plugin_rescan(this->this_blocker_, next_blocker)); | |
598 | this->this_blocker_ = next_blocker; | |
599 | } | |
600 | ||
89fc3421 CC |
601 | *last_blocker = this->this_blocker_; |
602 | } | |
603 | ||
0f3b89d8 ILT |
604 | // This is called when we see a new undefined symbol. If we are in |
605 | // the replacement phase, this means that we may need to rescan some | |
606 | // archives we have previously seen. | |
607 | ||
608 | void | |
609 | Plugin_manager::new_undefined_symbol(Symbol* sym) | |
610 | { | |
611 | if (this->in_replacement_phase_) | |
612 | this->undefined_symbols_.push_back(sym); | |
613 | } | |
614 | ||
615 | // Rescan archives as needed. This handles the case where a new | |
616 | // object file added by a plugin has an undefined reference to some | |
617 | // symbol defined in an archive. | |
618 | ||
619 | void | |
620 | Plugin_manager::rescan(Task* task) | |
621 | { | |
622 | size_t rescan_pos = 0; | |
623 | size_t rescan_size = this->rescannable_.size(); | |
624 | while (!this->undefined_symbols_.empty()) | |
625 | { | |
626 | if (rescan_pos >= rescan_size) | |
627 | { | |
628 | this->undefined_symbols_.clear(); | |
629 | return; | |
630 | } | |
631 | ||
632 | Undefined_symbol_list undefs; | |
633 | undefs.reserve(this->undefined_symbols_.size()); | |
634 | this->undefined_symbols_.swap(undefs); | |
635 | ||
636 | size_t min_rescan_pos = rescan_size; | |
637 | ||
638 | for (Undefined_symbol_list::const_iterator p = undefs.begin(); | |
639 | p != undefs.end(); | |
640 | ++p) | |
641 | { | |
642 | if (!(*p)->is_undefined()) | |
643 | continue; | |
644 | ||
645 | this->undefined_symbols_.push_back(*p); | |
646 | ||
647 | // Find the first rescan archive which defines this symbol, | |
648 | // starting at the current rescan position. The rescan position | |
649 | // exists so that given -la -lb -lc we don't look for undefined | |
650 | // symbols in -lb back in -la, but instead get the definition | |
651 | // from -lc. Don't bother to look past the current minimum | |
652 | // rescan position. | |
653 | for (size_t i = rescan_pos; i < min_rescan_pos; ++i) | |
654 | { | |
655 | if (this->rescannable_defines(i, *p)) | |
656 | { | |
657 | min_rescan_pos = i; | |
658 | break; | |
659 | } | |
660 | } | |
661 | } | |
662 | ||
663 | if (min_rescan_pos >= rescan_size) | |
664 | { | |
665 | // We didn't find any rescannable archives which define any | |
666 | // undefined symbols. | |
667 | return; | |
668 | } | |
669 | ||
670 | const Rescannable& r(this->rescannable_[min_rescan_pos]); | |
671 | if (r.is_archive) | |
672 | { | |
673 | Task_lock_obj<Archive> tl(task, r.u.archive); | |
674 | r.u.archive->add_symbols(this->symtab_, this->layout_, | |
675 | this->input_objects_, this->mapfile_); | |
676 | } | |
677 | else | |
678 | { | |
679 | size_t next_saw_undefined = this->symtab_->saw_undefined(); | |
680 | size_t saw_undefined; | |
681 | do | |
682 | { | |
683 | saw_undefined = next_saw_undefined; | |
684 | ||
685 | for (Input_group::const_iterator p = r.u.input_group->begin(); | |
686 | p != r.u.input_group->end(); | |
687 | ++p) | |
688 | { | |
689 | Task_lock_obj<Archive> tl(task, *p); | |
690 | ||
691 | (*p)->add_symbols(this->symtab_, this->layout_, | |
692 | this->input_objects_, this->mapfile_); | |
693 | } | |
694 | ||
695 | next_saw_undefined = this->symtab_->saw_undefined(); | |
696 | } | |
697 | while (saw_undefined != next_saw_undefined); | |
698 | } | |
699 | ||
700 | for (size_t i = rescan_pos; i < min_rescan_pos + 1; ++i) | |
701 | { | |
702 | if (this->rescannable_[i].is_archive) | |
703 | delete this->rescannable_[i].u.archive; | |
704 | else | |
705 | delete this->rescannable_[i].u.input_group; | |
706 | } | |
707 | ||
708 | rescan_pos = min_rescan_pos + 1; | |
709 | } | |
710 | } | |
711 | ||
712 | // Return whether the rescannable at index I defines SYM. | |
713 | ||
714 | bool | |
715 | Plugin_manager::rescannable_defines(size_t i, Symbol* sym) | |
716 | { | |
717 | const Rescannable& r(this->rescannable_[i]); | |
718 | if (r.is_archive) | |
719 | return r.u.archive->defines_symbol(sym); | |
720 | else | |
721 | { | |
722 | for (Input_group::const_iterator p = r.u.input_group->begin(); | |
723 | p != r.u.input_group->end(); | |
724 | ++p) | |
725 | { | |
726 | if ((*p)->defines_symbol(sym)) | |
727 | return true; | |
728 | } | |
729 | return false; | |
730 | } | |
731 | } | |
732 | ||
483620e8 | 733 | // Layout deferred objects. |
89fc3421 CC |
734 | |
735 | void | |
483620e8 | 736 | Plugin_manager::layout_deferred_objects() |
89fc3421 | 737 | { |
5995b570 CC |
738 | Deferred_layout_list::iterator obj; |
739 | ||
740 | for (obj = this->deferred_layout_objects_.begin(); | |
741 | obj != this->deferred_layout_objects_.end(); | |
742 | ++obj) | |
5f9bcf58 CC |
743 | { |
744 | // Lock the object so we can read from it. This is only called | |
745 | // single-threaded from queue_middle_tasks, so it is OK to lock. | |
746 | // Unfortunately we have no way to pass in a Task token. | |
747 | const Task* dummy_task = reinterpret_cast<const Task*>(-1); | |
748 | Task_lock_obj<Object> tl(dummy_task, *obj); | |
749 | (*obj)->layout_deferred_sections(this->layout_); | |
750 | } | |
483620e8 CC |
751 | } |
752 | ||
753 | // Call the cleanup handlers. | |
5995b570 | 754 | |
483620e8 CC |
755 | void |
756 | Plugin_manager::cleanup() | |
757 | { | |
20e2a8aa ILT |
758 | if (this->any_added_) |
759 | { | |
760 | // If any input files were added, close all the input files. | |
761 | // This is because the plugin may want to remove them, and on | |
762 | // Windows you are not allowed to remove an open file. | |
763 | close_all_descriptors(); | |
764 | } | |
765 | ||
89fc3421 CC |
766 | for (this->current_ = this->plugins_.begin(); |
767 | this->current_ != this->plugins_.end(); | |
768 | ++this->current_) | |
769 | (*this->current_)->cleanup(); | |
770 | } | |
771 | ||
772 | // Make a new Pluginobj object. This is called when the plugin calls | |
773 | // the add_symbols API. | |
774 | ||
775 | Pluginobj* | |
776 | Plugin_manager::make_plugin_object(unsigned int handle) | |
777 | { | |
778 | // Make sure we aren't asked to make an object for the same handle twice. | |
e9552f7e ST |
779 | if (this->objects_.size() != handle |
780 | && this->objects_[handle]->pluginobj() != NULL) | |
89fc3421 CC |
781 | return NULL; |
782 | ||
783 | Pluginobj* obj = make_sized_plugin_object(this->input_file_, | |
0f7c0701 CC |
784 | this->plugin_input_file_.offset, |
785 | this->plugin_input_file_.filesize); | |
e9552f7e ST |
786 | |
787 | ||
788 | // If the elf object for this file was pushed into the objects_ vector, delete | |
789 | // it to make room for the Pluginobj as this file is claimed. | |
790 | if (this->objects_.size() != handle) | |
791 | this->objects_.pop_back(); | |
792 | ||
89fc3421 CC |
793 | this->objects_.push_back(obj); |
794 | return obj; | |
795 | } | |
796 | ||
0f7c0701 CC |
797 | // Get the input file information with an open (possibly re-opened) |
798 | // file descriptor. | |
799 | ||
800 | ld_plugin_status | |
801 | Plugin_manager::get_input_file(unsigned int handle, | |
ca09d69a | 802 | struct ld_plugin_input_file* file) |
0f7c0701 | 803 | { |
e9552f7e | 804 | Pluginobj* obj = this->object(handle)->pluginobj(); |
0f7c0701 CC |
805 | if (obj == NULL) |
806 | return LDPS_BAD_HANDLE; | |
807 | ||
808 | obj->lock(this->task_); | |
809 | file->name = obj->filename().c_str(); | |
810 | file->fd = obj->descriptor(); | |
811 | file->offset = obj->offset(); | |
812 | file->filesize = obj->filesize(); | |
813 | file->handle = reinterpret_cast<void*>(handle); | |
814 | return LDPS_OK; | |
815 | } | |
816 | ||
817 | // Release the input file. | |
818 | ||
819 | ld_plugin_status | |
820 | Plugin_manager::release_input_file(unsigned int handle) | |
821 | { | |
e9552f7e ST |
822 | if (this->object(handle) == NULL) |
823 | return LDPS_BAD_HANDLE; | |
824 | ||
825 | Pluginobj* obj = this->object(handle)->pluginobj(); | |
826 | ||
0f7c0701 CC |
827 | if (obj == NULL) |
828 | return LDPS_BAD_HANDLE; | |
829 | ||
830 | obj->unlock(this->task_); | |
831 | return LDPS_OK; | |
832 | } | |
833 | ||
e9552f7e ST |
834 | // Get the elf object corresponding to the handle. Return NULL if we |
835 | // found a Pluginobj instead. | |
836 | ||
837 | Object* | |
838 | Plugin_manager::get_elf_object(const void* handle) | |
839 | { | |
840 | Object* obj = this->object( | |
841 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
842 | ||
843 | // The object should not be a Pluginobj. | |
844 | if (obj == NULL | |
845 | || obj->pluginobj() != NULL) | |
846 | return NULL; | |
847 | ||
848 | return obj; | |
849 | } | |
850 | ||
9c793f14 RÁE |
851 | ld_plugin_status |
852 | Plugin_manager::get_view(unsigned int handle, const void **viewp) | |
853 | { | |
854 | off_t offset; | |
855 | size_t filesize; | |
856 | Input_file *input_file; | |
e9552f7e | 857 | if (this->in_claim_file_handler_) |
9c793f14 RÁE |
858 | { |
859 | // We are being called from the claim_file hook. | |
860 | const struct ld_plugin_input_file &f = this->plugin_input_file_; | |
861 | offset = f.offset; | |
862 | filesize = f.filesize; | |
863 | input_file = this->input_file_; | |
864 | } | |
865 | else | |
866 | { | |
867 | // An already claimed file. | |
e9552f7e ST |
868 | if (this->object(handle) == NULL) |
869 | return LDPS_BAD_HANDLE; | |
870 | Pluginobj* obj = this->object(handle)->pluginobj(); | |
9c793f14 RÁE |
871 | if (obj == NULL) |
872 | return LDPS_BAD_HANDLE; | |
873 | offset = obj->offset(); | |
874 | filesize = obj->filesize(); | |
875 | input_file = obj->input_file(); | |
876 | } | |
877 | *viewp = (void*) input_file->file().get_view(offset, 0, filesize, false, | |
878 | false); | |
879 | return LDPS_OK; | |
880 | } | |
881 | ||
42218b9f RÁE |
882 | // Add a new library path. |
883 | ||
884 | ld_plugin_status | |
ca09d69a | 885 | Plugin_manager::set_extra_library_path(const char* path) |
42218b9f RÁE |
886 | { |
887 | this->extra_search_path_ = std::string(path); | |
888 | return LDPS_OK; | |
889 | } | |
890 | ||
89fc3421 CC |
891 | // Add a new input file. |
892 | ||
893 | ld_plugin_status | |
ca09d69a | 894 | Plugin_manager::add_input_file(const char* pathname, bool is_lib) |
89fc3421 | 895 | { |
ae3b5189 CD |
896 | Input_file_argument file(pathname, |
897 | (is_lib | |
898 | ? Input_file_argument::INPUT_FILE_TYPE_LIBRARY | |
899 | : Input_file_argument::INPUT_FILE_TYPE_FILE), | |
42218b9f RÁE |
900 | (is_lib |
901 | ? this->extra_search_path_.c_str() | |
902 | : ""), | |
903 | false, | |
904 | this->options_); | |
89fc3421 CC |
905 | Input_argument* input_argument = new Input_argument(file); |
906 | Task_token* next_blocker = new Task_token(true); | |
907 | next_blocker->add_blocker(); | |
8c21d9d3 | 908 | if (parameters->incremental()) |
40f36857 CC |
909 | gold_error(_("input files added by plug-ins in --incremental mode not " |
910 | "supported yet")); | |
f1ed28fb | 911 | this->workqueue_->queue_soon(new Read_symbols(this->input_objects_, |
89fc3421 CC |
912 | this->symtab_, |
913 | this->layout_, | |
914 | this->dirpath_, | |
15f8229b | 915 | 0, |
89fc3421 CC |
916 | this->mapfile_, |
917 | input_argument, | |
918 | NULL, | |
b0193076 | 919 | NULL, |
89fc3421 CC |
920 | this->this_blocker_, |
921 | next_blocker)); | |
922 | this->this_blocker_ = next_blocker; | |
0f3b89d8 | 923 | this->any_added_ = true; |
89fc3421 CC |
924 | return LDPS_OK; |
925 | } | |
926 | ||
927 | // Class Pluginobj. | |
928 | ||
2ea97941 ILT |
929 | Pluginobj::Pluginobj(const std::string& name, Input_file* input_file, |
930 | off_t offset, off_t filesize) | |
931 | : Object(name, input_file, false, offset), | |
932 | nsyms_(0), syms_(NULL), symbols_(), filesize_(filesize), comdat_map_() | |
89fc3421 CC |
933 | { |
934 | } | |
935 | ||
235061c2 | 936 | // Return TRUE if a defined symbol is referenced from outside the |
f7c5b166 CC |
937 | // universe of claimed objects. Only references from relocatable, |
938 | // non-IR (unclaimed) objects count as a reference. References from | |
939 | // dynamic objects count only as "visible". | |
d66a9eb3 CC |
940 | |
941 | static inline bool | |
235061c2 | 942 | is_referenced_from_outside(Symbol* lsym) |
d66a9eb3 CC |
943 | { |
944 | if (lsym->in_real_elf()) | |
945 | return true; | |
946 | if (parameters->options().relocatable()) | |
947 | return true; | |
84ced98a RÁE |
948 | if (parameters->options().is_undefined(lsym->name())) |
949 | return true; | |
235061c2 CC |
950 | return false; |
951 | } | |
952 | ||
953 | // Return TRUE if a defined symbol might be reachable from outside the | |
954 | // load module. | |
955 | ||
956 | static inline bool | |
957 | is_visible_from_outside(Symbol* lsym) | |
958 | { | |
f7c5b166 CC |
959 | if (lsym->in_dyn()) |
960 | return true; | |
ca464aac TJ |
961 | if (parameters->options().export_dynamic() || parameters->options().shared() |
962 | || parameters->options().in_dynamic_list(lsym->name()) | |
963 | || parameters->options().is_export_dynamic_symbol(lsym->name())) | |
d66a9eb3 CC |
964 | return lsym->is_externally_visible(); |
965 | return false; | |
966 | } | |
967 | ||
89fc3421 CC |
968 | // Get symbol resolution info. |
969 | ||
970 | ld_plugin_status | |
3c537f7f PC |
971 | Pluginobj::get_symbol_resolution_info(Symbol_table* symtab, |
972 | int nsyms, | |
235061c2 CC |
973 | ld_plugin_symbol* syms, |
974 | int version) const | |
975 | { | |
976 | // For version 1 of this interface, we cannot use | |
977 | // LDPR_PREVAILING_DEF_IRONLY_EXP, so we return LDPR_PREVAILING_DEF | |
978 | // instead. | |
979 | const ld_plugin_symbol_resolution ldpr_prevailing_def_ironly_exp | |
980 | = (version > 1 | |
981 | ? LDPR_PREVAILING_DEF_IRONLY_EXP | |
982 | : LDPR_PREVAILING_DEF); | |
983 | ||
abc8dcba | 984 | if (nsyms > this->nsyms_) |
89fc3421 | 985 | return LDPS_NO_SYMS; |
b0193076 RÁE |
986 | |
987 | if (static_cast<size_t>(nsyms) > this->symbols_.size()) | |
988 | { | |
989 | // We never decided to include this object. We mark all symbols as | |
990 | // preempted. | |
ca09d69a | 991 | gold_assert(this->symbols_.size() == 0); |
b0193076 RÁE |
992 | for (int i = 0; i < nsyms; i++) |
993 | syms[i].resolution = LDPR_PREEMPTED_REG; | |
95ecdfbf | 994 | return version > 2 ? LDPS_NO_SYMS : LDPS_OK; |
b0193076 RÁE |
995 | } |
996 | ||
3281b315 | 997 | Plugin_manager* plugins = parameters->options().plugins(); |
89fc3421 CC |
998 | for (int i = 0; i < nsyms; i++) |
999 | { | |
1000 | ld_plugin_symbol* isym = &syms[i]; | |
1001 | Symbol* lsym = this->symbols_[i]; | |
3c537f7f PC |
1002 | if (lsym->is_forwarder()) |
1003 | lsym = symtab->resolve_forwards(lsym); | |
89fc3421 CC |
1004 | ld_plugin_symbol_resolution res = LDPR_UNKNOWN; |
1005 | ||
3281b315 ST |
1006 | if (plugins->is_defsym_def(lsym->name())) |
1007 | { | |
1008 | // The symbol is redefined via defsym. | |
1009 | res = LDPR_PREEMPTED_REG; | |
1010 | } | |
1011 | else if (lsym->is_undefined()) | |
1012 | { | |
1013 | // The symbol remains undefined. | |
1014 | res = LDPR_UNDEF; | |
1015 | } | |
89fc3421 CC |
1016 | else if (isym->def == LDPK_UNDEF |
1017 | || isym->def == LDPK_WEAKUNDEF | |
1018 | || isym->def == LDPK_COMMON) | |
1019 | { | |
1020 | // The original symbol was undefined or common. | |
1021 | if (lsym->source() != Symbol::FROM_OBJECT) | |
1022 | res = LDPR_RESOLVED_EXEC; | |
be234d88 | 1023 | else if (lsym->object()->pluginobj() == this) |
235061c2 CC |
1024 | { |
1025 | if (is_referenced_from_outside(lsym)) | |
1026 | res = LDPR_PREVAILING_DEF; | |
1027 | else if (is_visible_from_outside(lsym)) | |
1028 | res = ldpr_prevailing_def_ironly_exp; | |
1029 | else | |
1030 | res = LDPR_PREVAILING_DEF_IRONLY; | |
1031 | } | |
89fc3421 CC |
1032 | else if (lsym->object()->pluginobj() != NULL) |
1033 | res = LDPR_RESOLVED_IR; | |
1034 | else if (lsym->object()->is_dynamic()) | |
1035 | res = LDPR_RESOLVED_DYN; | |
1036 | else | |
1037 | res = LDPR_RESOLVED_EXEC; | |
1038 | } | |
1039 | else | |
1040 | { | |
1041 | // The original symbol was a definition. | |
1042 | if (lsym->source() != Symbol::FROM_OBJECT) | |
1043 | res = LDPR_PREEMPTED_REG; | |
1044 | else if (lsym->object() == static_cast<const Object*>(this)) | |
235061c2 CC |
1045 | { |
1046 | if (is_referenced_from_outside(lsym)) | |
1047 | res = LDPR_PREVAILING_DEF; | |
1048 | else if (is_visible_from_outside(lsym)) | |
1049 | res = ldpr_prevailing_def_ironly_exp; | |
1050 | else | |
1051 | res = LDPR_PREVAILING_DEF_IRONLY; | |
1052 | } | |
89fc3421 CC |
1053 | else |
1054 | res = (lsym->object()->pluginobj() != NULL | |
1055 | ? LDPR_PREEMPTED_IR | |
1056 | : LDPR_PREEMPTED_REG); | |
1057 | } | |
1058 | isym->resolution = res; | |
1059 | } | |
1060 | return LDPS_OK; | |
1061 | } | |
1062 | ||
1063 | // Return TRUE if the comdat group with key COMDAT_KEY from this object | |
1064 | // should be kept. | |
1065 | ||
1066 | bool | |
2ea97941 | 1067 | Pluginobj::include_comdat_group(std::string comdat_key, Layout* layout) |
89fc3421 CC |
1068 | { |
1069 | std::pair<Comdat_map::iterator, bool> ins = | |
1070 | this->comdat_map_.insert(std::make_pair(comdat_key, false)); | |
1071 | ||
1072 | // If this is the first time we've seen this comdat key, ask the | |
1073 | // layout object whether it should be included. | |
1074 | if (ins.second) | |
2ea97941 ILT |
1075 | ins.first->second = layout->find_or_add_kept_section(comdat_key, |
1076 | NULL, 0, true, | |
1077 | true, NULL); | |
89fc3421 CC |
1078 | |
1079 | return ins.first->second; | |
1080 | } | |
1081 | ||
1082 | // Class Sized_pluginobj. | |
1083 | ||
1084 | template<int size, bool big_endian> | |
1085 | Sized_pluginobj<size, big_endian>::Sized_pluginobj( | |
2ea97941 ILT |
1086 | const std::string& name, |
1087 | Input_file* input_file, | |
1088 | off_t offset, | |
1089 | off_t filesize) | |
1090 | : Pluginobj(name, input_file, offset, filesize) | |
89fc3421 CC |
1091 | { |
1092 | } | |
1093 | ||
1094 | // Read the symbols. Not used for plugin objects. | |
1095 | ||
1096 | template<int size, bool big_endian> | |
1097 | void | |
1098 | Sized_pluginobj<size, big_endian>::do_read_symbols(Read_symbols_data*) | |
1099 | { | |
1100 | gold_unreachable(); | |
1101 | } | |
1102 | ||
1103 | // Lay out the input sections. Not used for plugin objects. | |
1104 | ||
1105 | template<int size, bool big_endian> | |
1106 | void | |
1107 | Sized_pluginobj<size, big_endian>::do_layout(Symbol_table*, Layout*, | |
1108 | Read_symbols_data*) | |
1109 | { | |
1110 | gold_unreachable(); | |
1111 | } | |
1112 | ||
1113 | // Add the symbols to the symbol table. | |
1114 | ||
89fc3421 CC |
1115 | template<int size, bool big_endian> |
1116 | void | |
1117 | Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table* symtab, | |
f488e4b0 | 1118 | Read_symbols_data*, |
2ea97941 | 1119 | Layout* layout) |
89fc3421 CC |
1120 | { |
1121 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1122 | unsigned char symbuf[sym_size]; | |
1123 | elfcpp::Sym<size, big_endian> sym(symbuf); | |
1124 | elfcpp::Sym_write<size, big_endian> osym(symbuf); | |
1125 | ||
89fc3421 CC |
1126 | this->symbols_.resize(this->nsyms_); |
1127 | ||
1128 | for (int i = 0; i < this->nsyms_; ++i) | |
1129 | { | |
ca09d69a | 1130 | const struct ld_plugin_symbol* isym = &this->syms_[i]; |
2ea97941 | 1131 | const char* name = isym->name; |
89fc3421 CC |
1132 | const char* ver = isym->version; |
1133 | elfcpp::Elf_Half shndx; | |
1134 | elfcpp::STB bind; | |
1135 | elfcpp::STV vis; | |
1136 | ||
2ea97941 ILT |
1137 | if (name != NULL && name[0] == '\0') |
1138 | name = NULL; | |
89fc3421 CC |
1139 | if (ver != NULL && ver[0] == '\0') |
1140 | ver = NULL; | |
1141 | ||
1142 | switch (isym->def) | |
1143 | { | |
1144 | case LDPK_WEAKDEF: | |
1145 | case LDPK_WEAKUNDEF: | |
1146 | bind = elfcpp::STB_WEAK; | |
1147 | break; | |
1148 | case LDPK_DEF: | |
1149 | case LDPK_UNDEF: | |
1150 | case LDPK_COMMON: | |
1151 | default: | |
1152 | bind = elfcpp::STB_GLOBAL; | |
1153 | break; | |
1154 | } | |
1155 | ||
1156 | switch (isym->def) | |
1157 | { | |
1158 | case LDPK_DEF: | |
1159 | case LDPK_WEAKDEF: | |
1160 | shndx = elfcpp::SHN_ABS; | |
1161 | break; | |
1162 | case LDPK_COMMON: | |
1163 | shndx = elfcpp::SHN_COMMON; | |
1164 | break; | |
1165 | case LDPK_UNDEF: | |
1166 | case LDPK_WEAKUNDEF: | |
1167 | default: | |
1168 | shndx = elfcpp::SHN_UNDEF; | |
1169 | break; | |
1170 | } | |
1171 | ||
1172 | switch (isym->visibility) | |
1173 | { | |
1174 | case LDPV_PROTECTED: | |
105b6afd | 1175 | vis = elfcpp::STV_PROTECTED; |
89fc3421 CC |
1176 | break; |
1177 | case LDPV_INTERNAL: | |
105b6afd | 1178 | vis = elfcpp::STV_INTERNAL; |
89fc3421 CC |
1179 | break; |
1180 | case LDPV_HIDDEN: | |
105b6afd | 1181 | vis = elfcpp::STV_HIDDEN; |
89fc3421 CC |
1182 | break; |
1183 | case LDPV_DEFAULT: | |
1184 | default: | |
1185 | vis = elfcpp::STV_DEFAULT; | |
1186 | break; | |
1187 | } | |
1188 | ||
1189 | if (isym->comdat_key != NULL | |
1190 | && isym->comdat_key[0] != '\0' | |
2ea97941 | 1191 | && !this->include_comdat_group(isym->comdat_key, layout)) |
89fc3421 CC |
1192 | shndx = elfcpp::SHN_UNDEF; |
1193 | ||
1194 | osym.put_st_name(0); | |
1195 | osym.put_st_value(0); | |
6168c2a1 | 1196 | osym.put_st_size(0); |
89fc3421 CC |
1197 | osym.put_st_info(bind, elfcpp::STT_NOTYPE); |
1198 | osym.put_st_other(vis, 0); | |
1199 | osym.put_st_shndx(shndx); | |
1200 | ||
1201 | this->symbols_[i] = | |
2ea97941 | 1202 | symtab->add_from_pluginobj<size, big_endian>(this, name, ver, &sym); |
89fc3421 CC |
1203 | } |
1204 | } | |
1205 | ||
b0193076 RÁE |
1206 | template<int size, bool big_endian> |
1207 | Archive::Should_include | |
1208 | Sized_pluginobj<size, big_endian>::do_should_include_member( | |
88a4108b ILT |
1209 | Symbol_table* symtab, |
1210 | Layout* layout, | |
1211 | Read_symbols_data*, | |
1212 | std::string* why) | |
b0193076 RÁE |
1213 | { |
1214 | char* tmpbuf = NULL; | |
1215 | size_t tmpbuflen = 0; | |
1216 | ||
88a4108b ILT |
1217 | for (int i = 0; i < this->nsyms_; ++i) |
1218 | { | |
1219 | const struct ld_plugin_symbol& sym = this->syms_[i]; | |
a06ed37d RÁE |
1220 | if (sym.def == LDPK_UNDEF || sym.def == LDPK_WEAKUNDEF) |
1221 | continue; | |
88a4108b ILT |
1222 | const char* name = sym.name; |
1223 | Symbol* symbol; | |
1224 | Archive::Should_include t = Archive::should_include_member(symtab, | |
1225 | layout, | |
1226 | name, | |
1227 | &symbol, why, | |
1228 | &tmpbuf, | |
1229 | &tmpbuflen); | |
b0193076 RÁE |
1230 | if (t == Archive::SHOULD_INCLUDE_YES) |
1231 | { | |
1232 | if (tmpbuf != NULL) | |
1233 | free(tmpbuf); | |
1234 | return t; | |
1235 | } | |
88a4108b | 1236 | } |
b0193076 RÁE |
1237 | if (tmpbuf != NULL) |
1238 | free(tmpbuf); | |
1239 | return Archive::SHOULD_INCLUDE_UNKNOWN; | |
1240 | } | |
1241 | ||
e0c52780 CC |
1242 | // Iterate over global symbols, calling a visitor class V for each. |
1243 | ||
1244 | template<int size, bool big_endian> | |
1245 | void | |
1246 | Sized_pluginobj<size, big_endian>::do_for_all_global_symbols( | |
1247 | Read_symbols_data*, | |
1248 | Library_base::Symbol_visitor_base* v) | |
1249 | { | |
1250 | for (int i = 0; i < this->nsyms_; ++i) | |
1251 | { | |
1252 | const struct ld_plugin_symbol& sym = this->syms_[i]; | |
1253 | if (sym.def != LDPK_UNDEF) | |
1254 | v->visit(sym.name); | |
1255 | } | |
1256 | } | |
1257 | ||
cdc29364 CC |
1258 | // Iterate over local symbols, calling a visitor class V for each GOT offset |
1259 | // associated with a local symbol. | |
1260 | template<int size, bool big_endian> | |
1261 | void | |
1262 | Sized_pluginobj<size, big_endian>::do_for_all_local_got_entries( | |
1263 | Got_offset_list::Visitor*) const | |
1264 | { | |
1265 | gold_unreachable(); | |
1266 | } | |
1267 | ||
89fc3421 CC |
1268 | // Get the size of a section. Not used for plugin objects. |
1269 | ||
1270 | template<int size, bool big_endian> | |
1271 | uint64_t | |
1272 | Sized_pluginobj<size, big_endian>::do_section_size(unsigned int) | |
1273 | { | |
1274 | gold_unreachable(); | |
1275 | return 0; | |
1276 | } | |
1277 | ||
1278 | // Get the name of a section. Not used for plugin objects. | |
1279 | ||
1280 | template<int size, bool big_endian> | |
1281 | std::string | |
54674d38 | 1282 | Sized_pluginobj<size, big_endian>::do_section_name(unsigned int) const |
89fc3421 CC |
1283 | { |
1284 | gold_unreachable(); | |
1285 | return std::string(); | |
1286 | } | |
1287 | ||
1288 | // Return a view of the contents of a section. Not used for plugin objects. | |
1289 | ||
1290 | template<int size, bool big_endian> | |
c1027032 CC |
1291 | const unsigned char* |
1292 | Sized_pluginobj<size, big_endian>::do_section_contents( | |
1293 | unsigned int, | |
1294 | section_size_type*, | |
1295 | bool) | |
89fc3421 | 1296 | { |
89fc3421 | 1297 | gold_unreachable(); |
c1027032 | 1298 | return NULL; |
89fc3421 CC |
1299 | } |
1300 | ||
1301 | // Return section flags. Not used for plugin objects. | |
1302 | ||
1303 | template<int size, bool big_endian> | |
1304 | uint64_t | |
1305 | Sized_pluginobj<size, big_endian>::do_section_flags(unsigned int) | |
1306 | { | |
1307 | gold_unreachable(); | |
1308 | return 0; | |
1309 | } | |
1310 | ||
ef15dade ST |
1311 | // Return section entsize. Not used for plugin objects. |
1312 | ||
1313 | template<int size, bool big_endian> | |
1314 | uint64_t | |
1315 | Sized_pluginobj<size, big_endian>::do_section_entsize(unsigned int) | |
1316 | { | |
1317 | gold_unreachable(); | |
1318 | return 0; | |
1319 | } | |
1320 | ||
89fc3421 CC |
1321 | // Return section address. Not used for plugin objects. |
1322 | ||
1323 | template<int size, bool big_endian> | |
1324 | uint64_t | |
1325 | Sized_pluginobj<size, big_endian>::do_section_address(unsigned int) | |
1326 | { | |
1327 | gold_unreachable(); | |
1328 | return 0; | |
1329 | } | |
1330 | ||
1331 | // Return section type. Not used for plugin objects. | |
1332 | ||
1333 | template<int size, bool big_endian> | |
1334 | unsigned int | |
1335 | Sized_pluginobj<size, big_endian>::do_section_type(unsigned int) | |
1336 | { | |
1337 | gold_unreachable(); | |
1338 | return 0; | |
1339 | } | |
1340 | ||
1341 | // Return the section link field. Not used for plugin objects. | |
1342 | ||
1343 | template<int size, bool big_endian> | |
1344 | unsigned int | |
1345 | Sized_pluginobj<size, big_endian>::do_section_link(unsigned int) | |
1346 | { | |
1347 | gold_unreachable(); | |
1348 | return 0; | |
1349 | } | |
1350 | ||
1351 | // Return the section link field. Not used for plugin objects. | |
1352 | ||
1353 | template<int size, bool big_endian> | |
1354 | unsigned int | |
1355 | Sized_pluginobj<size, big_endian>::do_section_info(unsigned int) | |
1356 | { | |
1357 | gold_unreachable(); | |
1358 | return 0; | |
1359 | } | |
1360 | ||
1361 | // Return the section alignment. Not used for plugin objects. | |
1362 | ||
1363 | template<int size, bool big_endian> | |
1364 | uint64_t | |
1365 | Sized_pluginobj<size, big_endian>::do_section_addralign(unsigned int) | |
1366 | { | |
1367 | gold_unreachable(); | |
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | // Return the Xindex structure to use. Not used for plugin objects. | |
1372 | ||
1373 | template<int size, bool big_endian> | |
1374 | Xindex* | |
1375 | Sized_pluginobj<size, big_endian>::do_initialize_xindex() | |
1376 | { | |
1377 | gold_unreachable(); | |
1378 | return NULL; | |
1379 | } | |
1380 | ||
53bbcc1b CC |
1381 | // Get symbol counts. Don't count plugin objects; the replacement |
1382 | // files will provide the counts. | |
89fc3421 CC |
1383 | |
1384 | template<int size, bool big_endian> | |
1385 | void | |
53bbcc1b CC |
1386 | Sized_pluginobj<size, big_endian>::do_get_global_symbol_counts( |
1387 | const Symbol_table*, | |
1388 | size_t* defined, | |
1389 | size_t* used) const | |
89fc3421 | 1390 | { |
53bbcc1b CC |
1391 | *defined = 0; |
1392 | *used = 0; | |
89fc3421 CC |
1393 | } |
1394 | ||
dde3f402 ILT |
1395 | // Get symbols. Not used for plugin objects. |
1396 | ||
1397 | template<int size, bool big_endian> | |
1398 | const Object::Symbols* | |
1399 | Sized_pluginobj<size, big_endian>::do_get_global_symbols() const | |
1400 | { | |
1401 | gold_unreachable(); | |
1402 | } | |
1403 | ||
5995b570 | 1404 | // Class Plugin_finish. This task runs after all replacement files have |
78384e8f CC |
1405 | // been added. For now, it's a placeholder for a possible plugin API |
1406 | // to allow the plugin to release most of its resources. The cleanup | |
1407 | // handlers must be called later, because they can remove the temporary | |
1408 | // object files that are needed until the end of the link. | |
89fc3421 | 1409 | |
5995b570 | 1410 | class Plugin_finish : public Task |
89fc3421 CC |
1411 | { |
1412 | public: | |
5995b570 | 1413 | Plugin_finish(Task_token* this_blocker, Task_token* next_blocker) |
89fc3421 CC |
1414 | : this_blocker_(this_blocker), next_blocker_(next_blocker) |
1415 | { } | |
1416 | ||
5995b570 | 1417 | ~Plugin_finish() |
89fc3421 CC |
1418 | { |
1419 | if (this->this_blocker_ != NULL) | |
1420 | delete this->this_blocker_; | |
1421 | } | |
1422 | ||
1423 | Task_token* | |
1424 | is_runnable() | |
1425 | { | |
1426 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
1427 | return this->this_blocker_; | |
1428 | return NULL; | |
1429 | } | |
1430 | ||
1431 | void | |
1432 | locks(Task_locker* tl) | |
1433 | { tl->add(this, this->next_blocker_); } | |
1434 | ||
1435 | void | |
1436 | run(Workqueue*) | |
483620e8 | 1437 | { |
78384e8f | 1438 | // We could call early cleanup handlers here. |
483620e8 | 1439 | } |
89fc3421 CC |
1440 | |
1441 | std::string | |
1442 | get_name() const | |
5995b570 | 1443 | { return "Plugin_finish"; } |
89fc3421 CC |
1444 | |
1445 | private: | |
1446 | Task_token* this_blocker_; | |
1447 | Task_token* next_blocker_; | |
1448 | }; | |
1449 | ||
1450 | // Class Plugin_hook. | |
1451 | ||
1452 | Plugin_hook::~Plugin_hook() | |
1453 | { | |
1454 | } | |
1455 | ||
1456 | // Return whether a Plugin_hook task is runnable. | |
1457 | ||
1458 | Task_token* | |
1459 | Plugin_hook::is_runnable() | |
1460 | { | |
1461 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
1462 | return this->this_blocker_; | |
1463 | return NULL; | |
1464 | } | |
1465 | ||
1466 | // Return a Task_locker for a Plugin_hook task. We don't need any | |
1467 | // locks here. | |
1468 | ||
1469 | void | |
1470 | Plugin_hook::locks(Task_locker*) | |
1471 | { | |
1472 | } | |
1473 | ||
89fc3421 CC |
1474 | // Run the "all symbols read" plugin hook. |
1475 | ||
1476 | void | |
5995b570 | 1477 | Plugin_hook::run(Workqueue* workqueue) |
89fc3421 CC |
1478 | { |
1479 | gold_assert(this->options_.has_plugins()); | |
a10ae760 | 1480 | Symbol* start_sym = this->symtab_->lookup(parameters->entry()); |
91ff43fe RÁE |
1481 | if (start_sym != NULL) |
1482 | start_sym->set_in_real_elf(); | |
1483 | ||
89fc3421 | 1484 | this->options_.plugins()->all_symbols_read(workqueue, |
0f7c0701 | 1485 | this, |
89fc3421 CC |
1486 | this->input_objects_, |
1487 | this->symtab_, | |
89fc3421 CC |
1488 | this->dirpath_, |
1489 | this->mapfile_, | |
1490 | &this->this_blocker_); | |
5995b570 CC |
1491 | workqueue->queue_soon(new Plugin_finish(this->this_blocker_, |
1492 | this->next_blocker_)); | |
89fc3421 CC |
1493 | } |
1494 | ||
1495 | // The C interface routines called by the plugins. | |
1496 | ||
1497 | #ifdef ENABLE_PLUGINS | |
1498 | ||
1499 | // Register a claim-file handler. | |
1500 | ||
1501 | static enum ld_plugin_status | |
1502 | register_claim_file(ld_plugin_claim_file_handler handler) | |
1503 | { | |
1504 | gold_assert(parameters->options().has_plugins()); | |
1505 | parameters->options().plugins()->set_claim_file_handler(handler); | |
1506 | return LDPS_OK; | |
1507 | } | |
1508 | ||
1509 | // Register an all-symbols-read handler. | |
1510 | ||
1511 | static enum ld_plugin_status | |
1512 | register_all_symbols_read(ld_plugin_all_symbols_read_handler handler) | |
1513 | { | |
1514 | gold_assert(parameters->options().has_plugins()); | |
1515 | parameters->options().plugins()->set_all_symbols_read_handler(handler); | |
1516 | return LDPS_OK; | |
1517 | } | |
1518 | ||
1519 | // Register a cleanup handler. | |
1520 | ||
1521 | static enum ld_plugin_status | |
1522 | register_cleanup(ld_plugin_cleanup_handler handler) | |
1523 | { | |
1524 | gold_assert(parameters->options().has_plugins()); | |
1525 | parameters->options().plugins()->set_cleanup_handler(handler); | |
1526 | return LDPS_OK; | |
1527 | } | |
1528 | ||
1529 | // Add symbols from a plugin-claimed input file. | |
1530 | ||
1531 | static enum ld_plugin_status | |
ca09d69a | 1532 | add_symbols(void* handle, int nsyms, const ld_plugin_symbol* syms) |
89fc3421 CC |
1533 | { |
1534 | gold_assert(parameters->options().has_plugins()); | |
1535 | Pluginobj* obj = parameters->options().plugins()->make_plugin_object( | |
1536 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
1537 | if (obj == NULL) | |
1538 | return LDPS_ERR; | |
1539 | obj->store_incoming_symbols(nsyms, syms); | |
1540 | return LDPS_OK; | |
1541 | } | |
1542 | ||
0f7c0701 CC |
1543 | // Get the input file information with an open (possibly re-opened) |
1544 | // file descriptor. | |
1545 | ||
1546 | static enum ld_plugin_status | |
ca09d69a | 1547 | get_input_file(const void* handle, struct ld_plugin_input_file* file) |
0f7c0701 CC |
1548 | { |
1549 | gold_assert(parameters->options().has_plugins()); | |
1550 | unsigned int obj_index = | |
1551 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
1552 | return parameters->options().plugins()->get_input_file(obj_index, file); | |
1553 | } | |
1554 | ||
1555 | // Release the input file. | |
1556 | ||
1557 | static enum ld_plugin_status | |
ca09d69a | 1558 | release_input_file(const void* handle) |
0f7c0701 CC |
1559 | { |
1560 | gold_assert(parameters->options().has_plugins()); | |
1561 | unsigned int obj_index = | |
1562 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
1563 | return parameters->options().plugins()->release_input_file(obj_index); | |
1564 | } | |
1565 | ||
9c793f14 RÁE |
1566 | static enum ld_plugin_status |
1567 | get_view(const void *handle, const void **viewp) | |
1568 | { | |
1569 | gold_assert(parameters->options().has_plugins()); | |
1570 | unsigned int obj_index = | |
1571 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
1572 | return parameters->options().plugins()->get_view(obj_index, viewp); | |
1573 | } | |
1574 | ||
89fc3421 CC |
1575 | // Get the symbol resolution info for a plugin-claimed input file. |
1576 | ||
1577 | static enum ld_plugin_status | |
ca09d69a | 1578 | get_symbols(const void* handle, int nsyms, ld_plugin_symbol* syms) |
89fc3421 CC |
1579 | { |
1580 | gold_assert(parameters->options().has_plugins()); | |
3c537f7f PC |
1581 | Plugin_manager* plugins = parameters->options().plugins(); |
1582 | Object* obj = plugins->object( | |
e9552f7e | 1583 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); |
89fc3421 CC |
1584 | if (obj == NULL) |
1585 | return LDPS_ERR; | |
e9552f7e ST |
1586 | Pluginobj* plugin_obj = obj->pluginobj(); |
1587 | if (plugin_obj == NULL) | |
1588 | return LDPS_ERR; | |
3c537f7f PC |
1589 | Symbol_table* symtab = plugins->symtab(); |
1590 | return plugin_obj->get_symbol_resolution_info(symtab, nsyms, syms, 1); | |
235061c2 CC |
1591 | } |
1592 | ||
1593 | // Version 2 of the above. The only difference is that this version | |
1594 | // is allowed to return the resolution code LDPR_PREVAILING_DEF_IRONLY_EXP. | |
1595 | ||
1596 | static enum ld_plugin_status | |
1597 | get_symbols_v2(const void* handle, int nsyms, ld_plugin_symbol* syms) | |
1598 | { | |
1599 | gold_assert(parameters->options().has_plugins()); | |
3c537f7f PC |
1600 | Plugin_manager* plugins = parameters->options().plugins(); |
1601 | Object* obj = plugins->object( | |
235061c2 CC |
1602 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); |
1603 | if (obj == NULL) | |
1604 | return LDPS_ERR; | |
1605 | Pluginobj* plugin_obj = obj->pluginobj(); | |
1606 | if (plugin_obj == NULL) | |
1607 | return LDPS_ERR; | |
3c537f7f PC |
1608 | Symbol_table* symtab = plugins->symtab(); |
1609 | return plugin_obj->get_symbol_resolution_info(symtab, nsyms, syms, 2); | |
89fc3421 CC |
1610 | } |
1611 | ||
95ecdfbf ES |
1612 | // Version 3 of the above. The only difference from v2 is that it |
1613 | // returns LDPS_NO_SYMS instead of LDPS_OK for the objects we never | |
1614 | // decided to include. | |
1615 | ||
1616 | static enum ld_plugin_status | |
1617 | get_symbols_v3(const void* handle, int nsyms, ld_plugin_symbol* syms) | |
1618 | { | |
1619 | gold_assert(parameters->options().has_plugins()); | |
1620 | Plugin_manager* plugins = parameters->options().plugins(); | |
1621 | Object* obj = plugins->object( | |
1622 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
1623 | if (obj == NULL) | |
1624 | return LDPS_ERR; | |
1625 | Pluginobj* plugin_obj = obj->pluginobj(); | |
1626 | if (plugin_obj == NULL) | |
1627 | return LDPS_ERR; | |
1628 | Symbol_table* symtab = plugins->symtab(); | |
1629 | return plugin_obj->get_symbol_resolution_info(symtab, nsyms, syms, 3); | |
1630 | } | |
1631 | ||
89fc3421 CC |
1632 | // Add a new (real) input file generated by a plugin. |
1633 | ||
1634 | static enum ld_plugin_status | |
ca09d69a | 1635 | add_input_file(const char* pathname) |
89fc3421 CC |
1636 | { |
1637 | gold_assert(parameters->options().has_plugins()); | |
e99daf92 ILT |
1638 | return parameters->options().plugins()->add_input_file(pathname, false); |
1639 | } | |
1640 | ||
1641 | // Add a new (real) library required by a plugin. | |
1642 | ||
1643 | static enum ld_plugin_status | |
ca09d69a | 1644 | add_input_library(const char* pathname) |
e99daf92 ILT |
1645 | { |
1646 | gold_assert(parameters->options().has_plugins()); | |
1647 | return parameters->options().plugins()->add_input_file(pathname, true); | |
89fc3421 CC |
1648 | } |
1649 | ||
42218b9f RÁE |
1650 | // Set the extra library path to be used by libraries added via |
1651 | // add_input_library | |
1652 | ||
1653 | static enum ld_plugin_status | |
ca09d69a | 1654 | set_extra_library_path(const char* path) |
42218b9f RÁE |
1655 | { |
1656 | gold_assert(parameters->options().has_plugins()); | |
1657 | return parameters->options().plugins()->set_extra_library_path(path); | |
1658 | } | |
1659 | ||
89fc3421 CC |
1660 | // Issue a diagnostic message from a plugin. |
1661 | ||
1662 | static enum ld_plugin_status | |
ca09d69a | 1663 | message(int level, const char* format, ...) |
89fc3421 CC |
1664 | { |
1665 | va_list args; | |
1666 | va_start(args, format); | |
1667 | ||
1668 | switch (level) | |
1669 | { | |
1670 | case LDPL_INFO: | |
1671 | parameters->errors()->info(format, args); | |
1672 | break; | |
1673 | case LDPL_WARNING: | |
1674 | parameters->errors()->warning(format, args); | |
1675 | break; | |
1676 | case LDPL_ERROR: | |
1677 | default: | |
1678 | parameters->errors()->error(format, args); | |
1679 | break; | |
1680 | case LDPL_FATAL: | |
1681 | parameters->errors()->fatal(format, args); | |
1682 | break; | |
1683 | } | |
1684 | ||
1685 | va_end(args); | |
1686 | return LDPS_OK; | |
1687 | } | |
1688 | ||
e9552f7e ST |
1689 | // Get the section count of the object corresponding to the handle. This |
1690 | // plugin interface can only be called in the claim_file handler of the plugin. | |
1691 | ||
1692 | static enum ld_plugin_status | |
1693 | get_input_section_count(const void* handle, unsigned int* count) | |
1694 | { | |
1695 | gold_assert(parameters->options().has_plugins()); | |
1696 | ||
1697 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1698 | return LDPS_ERR; | |
1699 | ||
1700 | Object* obj = parameters->options().plugins()->get_elf_object(handle); | |
1701 | ||
1702 | if (obj == NULL) | |
1703 | return LDPS_ERR; | |
1704 | ||
1705 | *count = obj->shnum(); | |
1706 | return LDPS_OK; | |
1707 | } | |
1708 | ||
1709 | // Get the type of the specified section in the object corresponding | |
1710 | // to the handle. This plugin interface can only be called in the | |
1711 | // claim_file handler of the plugin. | |
1712 | ||
1713 | static enum ld_plugin_status | |
1714 | get_input_section_type(const struct ld_plugin_section section, | |
1715 | unsigned int* type) | |
1716 | { | |
1717 | gold_assert(parameters->options().has_plugins()); | |
1718 | ||
1719 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1720 | return LDPS_ERR; | |
1721 | ||
1722 | Object* obj | |
1723 | = parameters->options().plugins()->get_elf_object(section.handle); | |
1724 | ||
1725 | if (obj == NULL) | |
1726 | return LDPS_BAD_HANDLE; | |
1727 | ||
1728 | *type = obj->section_type(section.shndx); | |
1729 | return LDPS_OK; | |
1730 | } | |
1731 | ||
1732 | // Get the name of the specified section in the object corresponding | |
1733 | // to the handle. This plugin interface can only be called in the | |
1734 | // claim_file handler of the plugin. | |
1735 | ||
1736 | static enum ld_plugin_status | |
1737 | get_input_section_name(const struct ld_plugin_section section, | |
1738 | char** section_name_ptr) | |
1739 | { | |
1740 | gold_assert(parameters->options().has_plugins()); | |
1741 | ||
1742 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1743 | return LDPS_ERR; | |
1744 | ||
1745 | Object* obj | |
1746 | = parameters->options().plugins()->get_elf_object(section.handle); | |
1747 | ||
1748 | if (obj == NULL) | |
1749 | return LDPS_BAD_HANDLE; | |
1750 | ||
1751 | // Check if the object is locked before getting the section name. | |
1752 | gold_assert(obj->is_locked()); | |
1753 | ||
1754 | const std::string section_name = obj->section_name(section.shndx); | |
1755 | *section_name_ptr = static_cast<char*>(malloc(section_name.length() + 1)); | |
1756 | memcpy(*section_name_ptr, section_name.c_str(), section_name.length() + 1); | |
1757 | return LDPS_OK; | |
1758 | } | |
1759 | ||
1760 | // Get the contents of the specified section in the object corresponding | |
1761 | // to the handle. This plugin interface can only be called in the | |
1762 | // claim_file handler of the plugin. | |
1763 | ||
1764 | static enum ld_plugin_status | |
1765 | get_input_section_contents(const struct ld_plugin_section section, | |
1766 | const unsigned char** section_contents_ptr, | |
1767 | size_t* len) | |
1768 | { | |
1769 | gold_assert(parameters->options().has_plugins()); | |
1770 | ||
1771 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1772 | return LDPS_ERR; | |
1773 | ||
1774 | Object* obj | |
1775 | = parameters->options().plugins()->get_elf_object(section.handle); | |
1776 | ||
1777 | if (obj == NULL) | |
1778 | return LDPS_BAD_HANDLE; | |
1779 | ||
1780 | // Check if the object is locked before getting the section contents. | |
1781 | gold_assert(obj->is_locked()); | |
1782 | ||
1783 | section_size_type plen; | |
1784 | *section_contents_ptr | |
1785 | = obj->section_contents(section.shndx, &plen, false); | |
1786 | *len = plen; | |
1787 | return LDPS_OK; | |
1788 | } | |
1789 | ||
82838bd6 CC |
1790 | // Get the alignment of the specified section in the object corresponding |
1791 | // to the handle. This plugin interface can only be called in the | |
1792 | // claim_file handler of the plugin. | |
1793 | ||
1794 | static enum ld_plugin_status | |
1795 | get_input_section_alignment(const struct ld_plugin_section section, | |
1796 | unsigned int* addralign) | |
1797 | { | |
1798 | gold_assert(parameters->options().has_plugins()); | |
1799 | ||
1800 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1801 | return LDPS_ERR; | |
1802 | ||
1803 | Object* obj | |
1804 | = parameters->options().plugins()->get_elf_object(section.handle); | |
1805 | ||
1806 | if (obj == NULL) | |
1807 | return LDPS_BAD_HANDLE; | |
1808 | ||
1809 | *addralign = obj->section_addralign(section.shndx); | |
1810 | return LDPS_OK; | |
1811 | } | |
1812 | ||
1813 | // Get the size of the specified section in the object corresponding | |
1814 | // to the handle. This plugin interface can only be called in the | |
1815 | // claim_file handler of the plugin. | |
1816 | ||
1817 | static enum ld_plugin_status | |
1818 | get_input_section_size(const struct ld_plugin_section section, | |
1819 | uint64_t* secsize) | |
1820 | { | |
1821 | gold_assert(parameters->options().has_plugins()); | |
1822 | ||
1823 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1824 | return LDPS_ERR; | |
1825 | ||
1826 | Object* obj | |
1827 | = parameters->options().plugins()->get_elf_object(section.handle); | |
1828 | ||
1829 | if (obj == NULL) | |
1830 | return LDPS_BAD_HANDLE; | |
1831 | ||
1832 | *secsize = obj->section_size(section.shndx); | |
1833 | return LDPS_OK; | |
1834 | } | |
1835 | ||
1836 | ||
e9552f7e ST |
1837 | // Specify the ordering of sections in the final layout. The sections are |
1838 | // specified as (handle,shndx) pairs in the two arrays in the order in | |
1839 | // which they should appear in the final layout. | |
1840 | ||
1841 | static enum ld_plugin_status | |
f0558624 | 1842 | update_section_order(const struct ld_plugin_section* section_list, |
e9552f7e ST |
1843 | unsigned int num_sections) |
1844 | { | |
1845 | gold_assert(parameters->options().has_plugins()); | |
1846 | ||
1847 | if (num_sections == 0) | |
1848 | return LDPS_OK; | |
1849 | ||
1850 | if (section_list == NULL) | |
1851 | return LDPS_ERR; | |
1852 | ||
f0558624 ST |
1853 | Layout* layout = parameters->options().plugins()->layout(); |
1854 | gold_assert (layout != NULL); | |
e9552f7e | 1855 | |
f0558624 ST |
1856 | std::map<Section_id, unsigned int>* order_map |
1857 | = layout->get_section_order_map(); | |
1858 | ||
1859 | /* Store the mapping from Section_id to section position in layout's | |
1860 | order_map to consult after output sections are added. */ | |
e9552f7e ST |
1861 | for (unsigned int i = 0; i < num_sections; ++i) |
1862 | { | |
1863 | Object* obj = parameters->options().plugins()->get_elf_object( | |
1864 | section_list[i].handle); | |
efc6fa12 | 1865 | if (obj == NULL || obj->is_dynamic()) |
e9552f7e ST |
1866 | return LDPS_BAD_HANDLE; |
1867 | unsigned int shndx = section_list[i].shndx; | |
efc6fa12 | 1868 | Section_id secn_id(static_cast<Relobj*>(obj), shndx); |
f0558624 | 1869 | (*order_map)[secn_id] = i + 1; |
e9552f7e ST |
1870 | } |
1871 | ||
e9552f7e ST |
1872 | return LDPS_OK; |
1873 | } | |
1874 | ||
1875 | // Let the linker know that the sections could be reordered. | |
1876 | ||
1877 | static enum ld_plugin_status | |
1878 | allow_section_ordering() | |
1879 | { | |
1880 | gold_assert(parameters->options().has_plugins()); | |
1881 | Layout* layout = parameters->options().plugins()->layout(); | |
1882 | layout->set_section_ordering_specified(); | |
1883 | return LDPS_OK; | |
1884 | } | |
1885 | ||
16164a6b ST |
1886 | // Let the linker know that a subset of sections could be mapped |
1887 | // to a unique segment. | |
1888 | ||
1889 | static enum ld_plugin_status | |
1890 | allow_unique_segment_for_sections() | |
1891 | { | |
1892 | gold_assert(parameters->options().has_plugins()); | |
1893 | Layout* layout = parameters->options().plugins()->layout(); | |
1894 | layout->set_unique_segment_for_sections_specified(); | |
1895 | return LDPS_OK; | |
1896 | } | |
1897 | ||
1898 | // This function should map the list of sections specified in the | |
1899 | // SECTION_LIST to a unique segment. ELF segments do not have names | |
1900 | // and the NAME is used to identify Output Section which should contain | |
1901 | // the list of sections. This Output Section will then be mapped to | |
1902 | // a unique segment. FLAGS is used to specify if any additional segment | |
1903 | // flags need to be set. For instance, a specific segment flag can be | |
1904 | // set to identify this segment. Unsetting segment flags is not possible. | |
1905 | // ALIGN specifies the alignment of the segment. | |
1906 | ||
1907 | static enum ld_plugin_status | |
1908 | unique_segment_for_sections(const char* segment_name, | |
1909 | uint64_t flags, | |
1910 | uint64_t align, | |
1911 | const struct ld_plugin_section* section_list, | |
1912 | unsigned int num_sections) | |
1913 | { | |
1914 | gold_assert(parameters->options().has_plugins()); | |
1915 | ||
1916 | if (num_sections == 0) | |
1917 | return LDPS_OK; | |
1918 | ||
1919 | if (section_list == NULL) | |
1920 | return LDPS_ERR; | |
1921 | ||
1922 | Layout* layout = parameters->options().plugins()->layout(); | |
1923 | gold_assert (layout != NULL); | |
1924 | ||
1925 | Layout::Unique_segment_info* s = new Layout::Unique_segment_info; | |
1926 | s->name = segment_name; | |
1927 | s->flags = flags; | |
1928 | s->align = align; | |
1929 | ||
1930 | for (unsigned int i = 0; i < num_sections; ++i) | |
1931 | { | |
1932 | Object* obj = parameters->options().plugins()->get_elf_object( | |
1933 | section_list[i].handle); | |
efc6fa12 | 1934 | if (obj == NULL || obj->is_dynamic()) |
16164a6b ST |
1935 | return LDPS_BAD_HANDLE; |
1936 | unsigned int shndx = section_list[i].shndx; | |
efc6fa12 | 1937 | Const_section_id secn_id(static_cast<Relobj*>(obj), shndx); |
16164a6b ST |
1938 | layout->insert_section_segment_map(secn_id, s); |
1939 | } | |
1940 | ||
1941 | return LDPS_OK; | |
1942 | } | |
1943 | ||
c4e64843 SC |
1944 | // Register a new_input handler. |
1945 | ||
1946 | static enum ld_plugin_status | |
1947 | register_new_input(ld_plugin_new_input_handler handler) | |
1948 | { | |
1949 | gold_assert(parameters->options().has_plugins()); | |
1950 | parameters->options().plugins()->set_new_input_handler(handler); | |
1951 | return LDPS_OK; | |
1952 | } | |
1953 | ||
89fc3421 CC |
1954 | #endif // ENABLE_PLUGINS |
1955 | ||
1956 | // Allocate a Pluginobj object of the appropriate size and endianness. | |
1957 | ||
1958 | static Pluginobj* | |
0f7c0701 | 1959 | make_sized_plugin_object(Input_file* input_file, off_t offset, off_t filesize) |
89fc3421 | 1960 | { |
89fc3421 CC |
1961 | Pluginobj* obj = NULL; |
1962 | ||
029ba973 ILT |
1963 | parameters_force_valid_target(); |
1964 | const Target& target(parameters->target()); | |
89fc3421 | 1965 | |
029ba973 | 1966 | if (target.get_size() == 32) |
89fc3421 | 1967 | { |
029ba973 | 1968 | if (target.is_big_endian()) |
92f03fcb | 1969 | #ifdef HAVE_TARGET_32_BIG |
89fc3421 | 1970 | obj = new Sized_pluginobj<32, true>(input_file->filename(), |
0f7c0701 | 1971 | input_file, offset, filesize); |
92f03fcb CC |
1972 | #else |
1973 | gold_error(_("%s: not configured to support " | |
1974 | "32-bit big-endian object"), | |
1975 | input_file->filename().c_str()); | |
89fc3421 | 1976 | #endif |
89fc3421 | 1977 | else |
92f03fcb | 1978 | #ifdef HAVE_TARGET_32_LITTLE |
89fc3421 | 1979 | obj = new Sized_pluginobj<32, false>(input_file->filename(), |
0f7c0701 | 1980 | input_file, offset, filesize); |
92f03fcb CC |
1981 | #else |
1982 | gold_error(_("%s: not configured to support " | |
1983 | "32-bit little-endian object"), | |
1984 | input_file->filename().c_str()); | |
89fc3421 CC |
1985 | #endif |
1986 | } | |
029ba973 | 1987 | else if (target.get_size() == 64) |
89fc3421 | 1988 | { |
029ba973 | 1989 | if (target.is_big_endian()) |
92f03fcb | 1990 | #ifdef HAVE_TARGET_64_BIG |
89fc3421 | 1991 | obj = new Sized_pluginobj<64, true>(input_file->filename(), |
0f7c0701 | 1992 | input_file, offset, filesize); |
92f03fcb CC |
1993 | #else |
1994 | gold_error(_("%s: not configured to support " | |
1995 | "64-bit big-endian object"), | |
1996 | input_file->filename().c_str()); | |
89fc3421 | 1997 | #endif |
89fc3421 | 1998 | else |
92f03fcb | 1999 | #ifdef HAVE_TARGET_64_LITTLE |
89fc3421 | 2000 | obj = new Sized_pluginobj<64, false>(input_file->filename(), |
0f7c0701 | 2001 | input_file, offset, filesize); |
92f03fcb CC |
2002 | #else |
2003 | gold_error(_("%s: not configured to support " | |
2004 | "64-bit little-endian object"), | |
2005 | input_file->filename().c_str()); | |
89fc3421 CC |
2006 | #endif |
2007 | } | |
2008 | ||
2009 | gold_assert(obj != NULL); | |
89fc3421 CC |
2010 | return obj; |
2011 | } | |
2012 | ||
2013 | } // End namespace gold. |