Commit | Line | Data |
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6d03d481 | 1 | // plugin.cc -- plugin manager for gold -*- C++ -*- |
89fc3421 | 2 | |
6f2750fe | 3 | // Copyright (C) 2008-2016 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); | |
89fc3421 CC |
161 | }; |
162 | ||
163 | #endif // ENABLE_PLUGINS | |
164 | ||
165 | static Pluginobj* make_sized_plugin_object(Input_file* input_file, | |
0f7c0701 | 166 | off_t offset, off_t filesize); |
89fc3421 CC |
167 | |
168 | // Plugin methods. | |
169 | ||
170 | // Load one plugin library. | |
171 | ||
172 | void | |
173 | Plugin::load() | |
174 | { | |
175 | #ifdef ENABLE_PLUGINS | |
89fc3421 CC |
176 | // Load the plugin library. |
177 | // FIXME: Look for the library in standard locations. | |
4674ecfc | 178 | this->handle_ = dlopen(this->filename_.c_str(), RTLD_NOW); |
89fc3421 CC |
179 | if (this->handle_ == NULL) |
180 | { | |
4802450a RÁE |
181 | gold_error(_("%s: could not load plugin library: %s"), |
182 | this->filename_.c_str(), dlerror()); | |
89fc3421 CC |
183 | return; |
184 | } | |
185 | ||
186 | // Find the plugin's onload entry point. | |
b59befec ILT |
187 | void* ptr = dlsym(this->handle_, "onload"); |
188 | if (ptr == NULL) | |
89fc3421 | 189 | { |
4674ecfc CC |
190 | gold_error(_("%s: could not find onload entry point"), |
191 | this->filename_.c_str()); | |
89fc3421 CC |
192 | return; |
193 | } | |
b59befec ILT |
194 | ld_plugin_onload onload; |
195 | gold_assert(sizeof(onload) == sizeof(ptr)); | |
196 | memcpy(&onload, &ptr, sizeof(ptr)); | |
89fc3421 CC |
197 | |
198 | // Get the linker's version number. | |
199 | const char* ver = get_version_string(); | |
200 | int major = 0; | |
201 | int minor = 0; | |
202 | sscanf(ver, "%d.%d", &major, &minor); | |
203 | ||
204 | // Allocate and populate a transfer vector. | |
95ecdfbf | 205 | const int tv_fixed_size = 27; |
e9552f7e | 206 | |
4674ecfc | 207 | int tv_size = this->args_.size() + tv_fixed_size; |
ca09d69a | 208 | ld_plugin_tv* tv = new ld_plugin_tv[tv_size]; |
89fc3421 | 209 | |
abc8dcba CC |
210 | // Put LDPT_MESSAGE at the front of the list so the plugin can use it |
211 | // while processing subsequent entries. | |
89fc3421 | 212 | int i = 0; |
abc8dcba CC |
213 | tv[i].tv_tag = LDPT_MESSAGE; |
214 | tv[i].tv_u.tv_message = message; | |
215 | ||
216 | ++i; | |
89fc3421 CC |
217 | tv[i].tv_tag = LDPT_API_VERSION; |
218 | tv[i].tv_u.tv_val = LD_PLUGIN_API_VERSION; | |
219 | ||
220 | ++i; | |
221 | tv[i].tv_tag = LDPT_GOLD_VERSION; | |
222 | tv[i].tv_u.tv_val = major * 100 + minor; | |
223 | ||
224 | ++i; | |
225 | tv[i].tv_tag = LDPT_LINKER_OUTPUT; | |
226 | if (parameters->options().relocatable()) | |
227 | tv[i].tv_u.tv_val = LDPO_REL; | |
228 | else if (parameters->options().shared()) | |
229 | tv[i].tv_u.tv_val = LDPO_DYN; | |
370e30b6 RÁE |
230 | else if (parameters->options().pie()) |
231 | tv[i].tv_u.tv_val = LDPO_PIE; | |
89fc3421 CC |
232 | else |
233 | tv[i].tv_u.tv_val = LDPO_EXEC; | |
234 | ||
3537c84b RÁE |
235 | ++i; |
236 | tv[i].tv_tag = LDPT_OUTPUT_NAME; | |
237 | tv[i].tv_u.tv_string = parameters->options().output(); | |
238 | ||
4674ecfc | 239 | for (unsigned int j = 0; j < this->args_.size(); ++j) |
89fc3421 CC |
240 | { |
241 | ++i; | |
242 | tv[i].tv_tag = LDPT_OPTION; | |
4674ecfc | 243 | tv[i].tv_u.tv_string = this->args_[j].c_str(); |
89fc3421 CC |
244 | } |
245 | ||
246 | ++i; | |
247 | tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK; | |
248 | tv[i].tv_u.tv_register_claim_file = register_claim_file; | |
249 | ||
250 | ++i; | |
251 | tv[i].tv_tag = LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK; | |
252 | tv[i].tv_u.tv_register_all_symbols_read = register_all_symbols_read; | |
253 | ||
254 | ++i; | |
255 | tv[i].tv_tag = LDPT_REGISTER_CLEANUP_HOOK; | |
256 | tv[i].tv_u.tv_register_cleanup = register_cleanup; | |
257 | ||
258 | ++i; | |
259 | tv[i].tv_tag = LDPT_ADD_SYMBOLS; | |
260 | tv[i].tv_u.tv_add_symbols = add_symbols; | |
261 | ||
0f7c0701 CC |
262 | ++i; |
263 | tv[i].tv_tag = LDPT_GET_INPUT_FILE; | |
264 | tv[i].tv_u.tv_get_input_file = get_input_file; | |
265 | ||
9c793f14 RÁE |
266 | ++i; |
267 | tv[i].tv_tag = LDPT_GET_VIEW; | |
268 | tv[i].tv_u.tv_get_view = get_view; | |
269 | ||
0f7c0701 CC |
270 | ++i; |
271 | tv[i].tv_tag = LDPT_RELEASE_INPUT_FILE; | |
272 | tv[i].tv_u.tv_release_input_file = release_input_file; | |
273 | ||
89fc3421 CC |
274 | ++i; |
275 | tv[i].tv_tag = LDPT_GET_SYMBOLS; | |
276 | tv[i].tv_u.tv_get_symbols = get_symbols; | |
277 | ||
235061c2 CC |
278 | ++i; |
279 | tv[i].tv_tag = LDPT_GET_SYMBOLS_V2; | |
280 | tv[i].tv_u.tv_get_symbols = get_symbols_v2; | |
281 | ||
95ecdfbf ES |
282 | ++i; |
283 | tv[i].tv_tag = LDPT_GET_SYMBOLS_V3; | |
284 | tv[i].tv_u.tv_get_symbols = get_symbols_v3; | |
285 | ||
89fc3421 CC |
286 | ++i; |
287 | tv[i].tv_tag = LDPT_ADD_INPUT_FILE; | |
288 | tv[i].tv_u.tv_add_input_file = add_input_file; | |
289 | ||
e99daf92 ILT |
290 | ++i; |
291 | tv[i].tv_tag = LDPT_ADD_INPUT_LIBRARY; | |
292 | tv[i].tv_u.tv_add_input_library = add_input_library; | |
293 | ||
42218b9f RÁE |
294 | ++i; |
295 | tv[i].tv_tag = LDPT_SET_EXTRA_LIBRARY_PATH; | |
296 | tv[i].tv_u.tv_set_extra_library_path = set_extra_library_path; | |
297 | ||
e9552f7e ST |
298 | ++i; |
299 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_COUNT; | |
300 | tv[i].tv_u.tv_get_input_section_count = get_input_section_count; | |
301 | ||
302 | ++i; | |
303 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_TYPE; | |
304 | tv[i].tv_u.tv_get_input_section_type = get_input_section_type; | |
305 | ||
306 | ++i; | |
307 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_NAME; | |
308 | tv[i].tv_u.tv_get_input_section_name = get_input_section_name; | |
309 | ||
310 | ++i; | |
311 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_CONTENTS; | |
312 | tv[i].tv_u.tv_get_input_section_contents = get_input_section_contents; | |
313 | ||
314 | ++i; | |
315 | tv[i].tv_tag = LDPT_UPDATE_SECTION_ORDER; | |
316 | tv[i].tv_u.tv_update_section_order = update_section_order; | |
317 | ||
318 | ++i; | |
319 | tv[i].tv_tag = LDPT_ALLOW_SECTION_ORDERING; | |
320 | tv[i].tv_u.tv_allow_section_ordering = allow_section_ordering; | |
321 | ||
16164a6b ST |
322 | ++i; |
323 | tv[i].tv_tag = LDPT_ALLOW_UNIQUE_SEGMENT_FOR_SECTIONS; | |
324 | tv[i].tv_u.tv_allow_unique_segment_for_sections | |
325 | = allow_unique_segment_for_sections; | |
326 | ||
327 | ++i; | |
328 | tv[i].tv_tag = LDPT_UNIQUE_SEGMENT_FOR_SECTIONS; | |
329 | tv[i].tv_u.tv_unique_segment_for_sections = unique_segment_for_sections; | |
330 | ||
89fc3421 CC |
331 | ++i; |
332 | tv[i].tv_tag = LDPT_NULL; | |
333 | tv[i].tv_u.tv_val = 0; | |
334 | ||
335 | gold_assert(i == tv_size - 1); | |
336 | ||
337 | // Call the onload entry point. | |
338 | (*onload)(tv); | |
339 | ||
6c52134c | 340 | delete[] tv; |
89fc3421 CC |
341 | #endif // ENABLE_PLUGINS |
342 | } | |
343 | ||
344 | // Call the plugin claim-file handler. | |
345 | ||
346 | inline bool | |
ca09d69a | 347 | Plugin::claim_file(struct ld_plugin_input_file* plugin_input_file) |
89fc3421 CC |
348 | { |
349 | int claimed = 0; | |
350 | ||
351 | if (this->claim_file_handler_ != NULL) | |
352 | { | |
353 | (*this->claim_file_handler_)(plugin_input_file, &claimed); | |
354 | if (claimed) | |
355 | return true; | |
356 | } | |
357 | return false; | |
358 | } | |
359 | ||
360 | // Call the all-symbols-read handler. | |
361 | ||
362 | inline void | |
363 | Plugin::all_symbols_read() | |
364 | { | |
365 | if (this->all_symbols_read_handler_ != NULL) | |
366 | (*this->all_symbols_read_handler_)(); | |
367 | } | |
368 | ||
369 | // Call the cleanup handler. | |
370 | ||
371 | inline void | |
372 | Plugin::cleanup() | |
373 | { | |
40f36857 CC |
374 | if (this->cleanup_handler_ != NULL && !this->cleanup_done_) |
375 | { | |
376 | // Set this flag before calling to prevent a recursive plunge | |
377 | // in the event that a plugin's cleanup handler issues a | |
378 | // fatal error. | |
379 | this->cleanup_done_ = true; | |
380 | (*this->cleanup_handler_)(); | |
381 | } | |
89fc3421 CC |
382 | } |
383 | ||
0f3b89d8 ILT |
384 | // This task is used to rescan archives as needed. |
385 | ||
386 | class Plugin_rescan : public Task | |
387 | { | |
388 | public: | |
389 | Plugin_rescan(Task_token* this_blocker, Task_token* next_blocker) | |
390 | : this_blocker_(this_blocker), next_blocker_(next_blocker) | |
391 | { } | |
392 | ||
393 | ~Plugin_rescan() | |
394 | { | |
395 | delete this->this_blocker_; | |
396 | } | |
397 | ||
398 | Task_token* | |
399 | is_runnable() | |
400 | { | |
401 | if (this->this_blocker_->is_blocked()) | |
402 | return this->this_blocker_; | |
403 | return NULL; | |
404 | } | |
405 | ||
406 | void | |
407 | locks(Task_locker* tl) | |
408 | { tl->add(this, this->next_blocker_); } | |
409 | ||
410 | void | |
411 | run(Workqueue*) | |
412 | { parameters->options().plugins()->rescan(this); } | |
413 | ||
414 | std::string | |
415 | get_name() const | |
416 | { return "Plugin_rescan"; } | |
417 | ||
418 | private: | |
419 | Task_token* this_blocker_; | |
420 | Task_token* next_blocker_; | |
421 | }; | |
422 | ||
89fc3421 CC |
423 | // Plugin_manager methods. |
424 | ||
425 | Plugin_manager::~Plugin_manager() | |
426 | { | |
427 | for (Plugin_list::iterator p = this->plugins_.begin(); | |
428 | p != this->plugins_.end(); | |
429 | ++p) | |
430 | delete *p; | |
431 | this->plugins_.clear(); | |
432 | for (Object_list::iterator obj = this->objects_.begin(); | |
433 | obj != this->objects_.end(); | |
434 | ++obj) | |
435 | delete *obj; | |
436 | this->objects_.clear(); | |
d37ffe25 | 437 | delete this->lock_; |
89fc3421 CC |
438 | } |
439 | ||
440 | // Load all plugin libraries. | |
441 | ||
442 | void | |
e9552f7e | 443 | Plugin_manager::load_plugins(Layout* layout) |
89fc3421 | 444 | { |
e9552f7e | 445 | this->layout_ = layout; |
89fc3421 CC |
446 | for (this->current_ = this->plugins_.begin(); |
447 | this->current_ != this->plugins_.end(); | |
448 | ++this->current_) | |
449 | (*this->current_)->load(); | |
450 | } | |
451 | ||
452 | // Call the plugin claim-file handlers in turn to see if any claim the file. | |
453 | ||
454 | Pluginobj* | |
455 | Plugin_manager::claim_file(Input_file* input_file, off_t offset, | |
e9552f7e | 456 | off_t filesize, Object* elf_object) |
89fc3421 | 457 | { |
d37ffe25 ED |
458 | bool lock_initialized = this->initialize_lock_.initialize(); |
459 | ||
460 | gold_assert(lock_initialized); | |
461 | Hold_lock hl(*this->lock_); | |
89fc3421 CC |
462 | if (this->in_replacement_phase_) |
463 | return NULL; | |
464 | ||
465 | unsigned int handle = this->objects_.size(); | |
466 | this->input_file_ = input_file; | |
467 | this->plugin_input_file_.name = input_file->filename().c_str(); | |
468 | this->plugin_input_file_.fd = input_file->file().descriptor(); | |
469 | this->plugin_input_file_.offset = offset; | |
470 | this->plugin_input_file_.filesize = filesize; | |
471 | this->plugin_input_file_.handle = reinterpret_cast<void*>(handle); | |
e9552f7e ST |
472 | if (elf_object != NULL) |
473 | this->objects_.push_back(elf_object); | |
474 | this->in_claim_file_handler_ = true; | |
89fc3421 CC |
475 | |
476 | for (this->current_ = this->plugins_.begin(); | |
477 | this->current_ != this->plugins_.end(); | |
478 | ++this->current_) | |
479 | { | |
480 | if ((*this->current_)->claim_file(&this->plugin_input_file_)) | |
481 | { | |
0f3b89d8 | 482 | this->any_claimed_ = true; |
e9552f7e | 483 | this->in_claim_file_handler_ = false; |
0f3b89d8 | 484 | |
e9552f7e ST |
485 | if (this->objects_.size() > handle |
486 | && this->objects_[handle]->pluginobj() != NULL) | |
487 | return this->objects_[handle]->pluginobj(); | |
abc8dcba CC |
488 | |
489 | // If the plugin claimed the file but did not call the | |
490 | // add_symbols callback, we need to create the Pluginobj now. | |
491 | Pluginobj* obj = this->make_plugin_object(handle); | |
492 | return obj; | |
89fc3421 CC |
493 | } |
494 | } | |
495 | ||
e9552f7e | 496 | this->in_claim_file_handler_ = false; |
89fc3421 CC |
497 | return NULL; |
498 | } | |
499 | ||
0f3b89d8 ILT |
500 | // Save an archive. This is used so that a plugin can add a file |
501 | // which refers to a symbol which was not previously referenced. In | |
502 | // that case we want to pretend that the symbol was referenced before, | |
503 | // and pull in the archive object. | |
504 | ||
505 | void | |
506 | Plugin_manager::save_archive(Archive* archive) | |
507 | { | |
508 | if (this->in_replacement_phase_ || !this->any_claimed_) | |
509 | delete archive; | |
510 | else | |
511 | this->rescannable_.push_back(Rescannable(archive)); | |
512 | } | |
513 | ||
514 | // Save an Input_group. This is like save_archive. | |
515 | ||
516 | void | |
517 | Plugin_manager::save_input_group(Input_group* input_group) | |
518 | { | |
519 | if (this->in_replacement_phase_ || !this->any_claimed_) | |
520 | delete input_group; | |
521 | else | |
522 | this->rescannable_.push_back(Rescannable(input_group)); | |
523 | } | |
524 | ||
89fc3421 CC |
525 | // Call the all-symbols-read handlers. |
526 | ||
527 | void | |
0f7c0701 | 528 | Plugin_manager::all_symbols_read(Workqueue* workqueue, Task* task, |
89fc3421 | 529 | Input_objects* input_objects, |
e9552f7e | 530 | Symbol_table* symtab, |
89fc3421 CC |
531 | Dirsearch* dirpath, Mapfile* mapfile, |
532 | Task_token** last_blocker) | |
533 | { | |
534 | this->in_replacement_phase_ = true; | |
535 | this->workqueue_ = workqueue; | |
0f7c0701 | 536 | this->task_ = task; |
89fc3421 CC |
537 | this->input_objects_ = input_objects; |
538 | this->symtab_ = symtab; | |
89fc3421 CC |
539 | this->dirpath_ = dirpath; |
540 | this->mapfile_ = mapfile; | |
541 | this->this_blocker_ = NULL; | |
542 | ||
543 | for (this->current_ = this->plugins_.begin(); | |
544 | this->current_ != this->plugins_.end(); | |
545 | ++this->current_) | |
546 | (*this->current_)->all_symbols_read(); | |
547 | ||
0f3b89d8 ILT |
548 | if (this->any_added_) |
549 | { | |
550 | Task_token* next_blocker = new Task_token(true); | |
551 | next_blocker->add_blocker(); | |
552 | workqueue->queue(new Plugin_rescan(this->this_blocker_, next_blocker)); | |
553 | this->this_blocker_ = next_blocker; | |
554 | } | |
555 | ||
89fc3421 CC |
556 | *last_blocker = this->this_blocker_; |
557 | } | |
558 | ||
0f3b89d8 ILT |
559 | // This is called when we see a new undefined symbol. If we are in |
560 | // the replacement phase, this means that we may need to rescan some | |
561 | // archives we have previously seen. | |
562 | ||
563 | void | |
564 | Plugin_manager::new_undefined_symbol(Symbol* sym) | |
565 | { | |
566 | if (this->in_replacement_phase_) | |
567 | this->undefined_symbols_.push_back(sym); | |
568 | } | |
569 | ||
570 | // Rescan archives as needed. This handles the case where a new | |
571 | // object file added by a plugin has an undefined reference to some | |
572 | // symbol defined in an archive. | |
573 | ||
574 | void | |
575 | Plugin_manager::rescan(Task* task) | |
576 | { | |
577 | size_t rescan_pos = 0; | |
578 | size_t rescan_size = this->rescannable_.size(); | |
579 | while (!this->undefined_symbols_.empty()) | |
580 | { | |
581 | if (rescan_pos >= rescan_size) | |
582 | { | |
583 | this->undefined_symbols_.clear(); | |
584 | return; | |
585 | } | |
586 | ||
587 | Undefined_symbol_list undefs; | |
588 | undefs.reserve(this->undefined_symbols_.size()); | |
589 | this->undefined_symbols_.swap(undefs); | |
590 | ||
591 | size_t min_rescan_pos = rescan_size; | |
592 | ||
593 | for (Undefined_symbol_list::const_iterator p = undefs.begin(); | |
594 | p != undefs.end(); | |
595 | ++p) | |
596 | { | |
597 | if (!(*p)->is_undefined()) | |
598 | continue; | |
599 | ||
600 | this->undefined_symbols_.push_back(*p); | |
601 | ||
602 | // Find the first rescan archive which defines this symbol, | |
603 | // starting at the current rescan position. The rescan position | |
604 | // exists so that given -la -lb -lc we don't look for undefined | |
605 | // symbols in -lb back in -la, but instead get the definition | |
606 | // from -lc. Don't bother to look past the current minimum | |
607 | // rescan position. | |
608 | for (size_t i = rescan_pos; i < min_rescan_pos; ++i) | |
609 | { | |
610 | if (this->rescannable_defines(i, *p)) | |
611 | { | |
612 | min_rescan_pos = i; | |
613 | break; | |
614 | } | |
615 | } | |
616 | } | |
617 | ||
618 | if (min_rescan_pos >= rescan_size) | |
619 | { | |
620 | // We didn't find any rescannable archives which define any | |
621 | // undefined symbols. | |
622 | return; | |
623 | } | |
624 | ||
625 | const Rescannable& r(this->rescannable_[min_rescan_pos]); | |
626 | if (r.is_archive) | |
627 | { | |
628 | Task_lock_obj<Archive> tl(task, r.u.archive); | |
629 | r.u.archive->add_symbols(this->symtab_, this->layout_, | |
630 | this->input_objects_, this->mapfile_); | |
631 | } | |
632 | else | |
633 | { | |
634 | size_t next_saw_undefined = this->symtab_->saw_undefined(); | |
635 | size_t saw_undefined; | |
636 | do | |
637 | { | |
638 | saw_undefined = next_saw_undefined; | |
639 | ||
640 | for (Input_group::const_iterator p = r.u.input_group->begin(); | |
641 | p != r.u.input_group->end(); | |
642 | ++p) | |
643 | { | |
644 | Task_lock_obj<Archive> tl(task, *p); | |
645 | ||
646 | (*p)->add_symbols(this->symtab_, this->layout_, | |
647 | this->input_objects_, this->mapfile_); | |
648 | } | |
649 | ||
650 | next_saw_undefined = this->symtab_->saw_undefined(); | |
651 | } | |
652 | while (saw_undefined != next_saw_undefined); | |
653 | } | |
654 | ||
655 | for (size_t i = rescan_pos; i < min_rescan_pos + 1; ++i) | |
656 | { | |
657 | if (this->rescannable_[i].is_archive) | |
658 | delete this->rescannable_[i].u.archive; | |
659 | else | |
660 | delete this->rescannable_[i].u.input_group; | |
661 | } | |
662 | ||
663 | rescan_pos = min_rescan_pos + 1; | |
664 | } | |
665 | } | |
666 | ||
667 | // Return whether the rescannable at index I defines SYM. | |
668 | ||
669 | bool | |
670 | Plugin_manager::rescannable_defines(size_t i, Symbol* sym) | |
671 | { | |
672 | const Rescannable& r(this->rescannable_[i]); | |
673 | if (r.is_archive) | |
674 | return r.u.archive->defines_symbol(sym); | |
675 | else | |
676 | { | |
677 | for (Input_group::const_iterator p = r.u.input_group->begin(); | |
678 | p != r.u.input_group->end(); | |
679 | ++p) | |
680 | { | |
681 | if ((*p)->defines_symbol(sym)) | |
682 | return true; | |
683 | } | |
684 | return false; | |
685 | } | |
686 | } | |
687 | ||
483620e8 | 688 | // Layout deferred objects. |
89fc3421 CC |
689 | |
690 | void | |
483620e8 | 691 | Plugin_manager::layout_deferred_objects() |
89fc3421 | 692 | { |
5995b570 CC |
693 | Deferred_layout_list::iterator obj; |
694 | ||
695 | for (obj = this->deferred_layout_objects_.begin(); | |
696 | obj != this->deferred_layout_objects_.end(); | |
697 | ++obj) | |
5f9bcf58 CC |
698 | { |
699 | // Lock the object so we can read from it. This is only called | |
700 | // single-threaded from queue_middle_tasks, so it is OK to lock. | |
701 | // Unfortunately we have no way to pass in a Task token. | |
702 | const Task* dummy_task = reinterpret_cast<const Task*>(-1); | |
703 | Task_lock_obj<Object> tl(dummy_task, *obj); | |
704 | (*obj)->layout_deferred_sections(this->layout_); | |
705 | } | |
483620e8 CC |
706 | } |
707 | ||
708 | // Call the cleanup handlers. | |
5995b570 | 709 | |
483620e8 CC |
710 | void |
711 | Plugin_manager::cleanup() | |
712 | { | |
20e2a8aa ILT |
713 | if (this->any_added_) |
714 | { | |
715 | // If any input files were added, close all the input files. | |
716 | // This is because the plugin may want to remove them, and on | |
717 | // Windows you are not allowed to remove an open file. | |
718 | close_all_descriptors(); | |
719 | } | |
720 | ||
89fc3421 CC |
721 | for (this->current_ = this->plugins_.begin(); |
722 | this->current_ != this->plugins_.end(); | |
723 | ++this->current_) | |
724 | (*this->current_)->cleanup(); | |
725 | } | |
726 | ||
727 | // Make a new Pluginobj object. This is called when the plugin calls | |
728 | // the add_symbols API. | |
729 | ||
730 | Pluginobj* | |
731 | Plugin_manager::make_plugin_object(unsigned int handle) | |
732 | { | |
733 | // Make sure we aren't asked to make an object for the same handle twice. | |
e9552f7e ST |
734 | if (this->objects_.size() != handle |
735 | && this->objects_[handle]->pluginobj() != NULL) | |
89fc3421 CC |
736 | return NULL; |
737 | ||
738 | Pluginobj* obj = make_sized_plugin_object(this->input_file_, | |
0f7c0701 CC |
739 | this->plugin_input_file_.offset, |
740 | this->plugin_input_file_.filesize); | |
e9552f7e ST |
741 | |
742 | ||
743 | // If the elf object for this file was pushed into the objects_ vector, delete | |
744 | // it to make room for the Pluginobj as this file is claimed. | |
745 | if (this->objects_.size() != handle) | |
746 | this->objects_.pop_back(); | |
747 | ||
89fc3421 CC |
748 | this->objects_.push_back(obj); |
749 | return obj; | |
750 | } | |
751 | ||
0f7c0701 CC |
752 | // Get the input file information with an open (possibly re-opened) |
753 | // file descriptor. | |
754 | ||
755 | ld_plugin_status | |
756 | Plugin_manager::get_input_file(unsigned int handle, | |
ca09d69a | 757 | struct ld_plugin_input_file* file) |
0f7c0701 | 758 | { |
e9552f7e | 759 | Pluginobj* obj = this->object(handle)->pluginobj(); |
0f7c0701 CC |
760 | if (obj == NULL) |
761 | return LDPS_BAD_HANDLE; | |
762 | ||
763 | obj->lock(this->task_); | |
764 | file->name = obj->filename().c_str(); | |
765 | file->fd = obj->descriptor(); | |
766 | file->offset = obj->offset(); | |
767 | file->filesize = obj->filesize(); | |
768 | file->handle = reinterpret_cast<void*>(handle); | |
769 | return LDPS_OK; | |
770 | } | |
771 | ||
772 | // Release the input file. | |
773 | ||
774 | ld_plugin_status | |
775 | Plugin_manager::release_input_file(unsigned int handle) | |
776 | { | |
e9552f7e ST |
777 | if (this->object(handle) == NULL) |
778 | return LDPS_BAD_HANDLE; | |
779 | ||
780 | Pluginobj* obj = this->object(handle)->pluginobj(); | |
781 | ||
0f7c0701 CC |
782 | if (obj == NULL) |
783 | return LDPS_BAD_HANDLE; | |
784 | ||
785 | obj->unlock(this->task_); | |
786 | return LDPS_OK; | |
787 | } | |
788 | ||
e9552f7e ST |
789 | // Get the elf object corresponding to the handle. Return NULL if we |
790 | // found a Pluginobj instead. | |
791 | ||
792 | Object* | |
793 | Plugin_manager::get_elf_object(const void* handle) | |
794 | { | |
795 | Object* obj = this->object( | |
796 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
797 | ||
798 | // The object should not be a Pluginobj. | |
799 | if (obj == NULL | |
800 | || obj->pluginobj() != NULL) | |
801 | return NULL; | |
802 | ||
803 | return obj; | |
804 | } | |
805 | ||
9c793f14 RÁE |
806 | ld_plugin_status |
807 | Plugin_manager::get_view(unsigned int handle, const void **viewp) | |
808 | { | |
809 | off_t offset; | |
810 | size_t filesize; | |
811 | Input_file *input_file; | |
e9552f7e | 812 | if (this->in_claim_file_handler_) |
9c793f14 RÁE |
813 | { |
814 | // We are being called from the claim_file hook. | |
815 | const struct ld_plugin_input_file &f = this->plugin_input_file_; | |
816 | offset = f.offset; | |
817 | filesize = f.filesize; | |
818 | input_file = this->input_file_; | |
819 | } | |
820 | else | |
821 | { | |
822 | // An already claimed file. | |
e9552f7e ST |
823 | if (this->object(handle) == NULL) |
824 | return LDPS_BAD_HANDLE; | |
825 | Pluginobj* obj = this->object(handle)->pluginobj(); | |
9c793f14 RÁE |
826 | if (obj == NULL) |
827 | return LDPS_BAD_HANDLE; | |
828 | offset = obj->offset(); | |
829 | filesize = obj->filesize(); | |
830 | input_file = obj->input_file(); | |
831 | } | |
832 | *viewp = (void*) input_file->file().get_view(offset, 0, filesize, false, | |
833 | false); | |
834 | return LDPS_OK; | |
835 | } | |
836 | ||
42218b9f RÁE |
837 | // Add a new library path. |
838 | ||
839 | ld_plugin_status | |
ca09d69a | 840 | Plugin_manager::set_extra_library_path(const char* path) |
42218b9f RÁE |
841 | { |
842 | this->extra_search_path_ = std::string(path); | |
843 | return LDPS_OK; | |
844 | } | |
845 | ||
89fc3421 CC |
846 | // Add a new input file. |
847 | ||
848 | ld_plugin_status | |
ca09d69a | 849 | Plugin_manager::add_input_file(const char* pathname, bool is_lib) |
89fc3421 | 850 | { |
ae3b5189 CD |
851 | Input_file_argument file(pathname, |
852 | (is_lib | |
853 | ? Input_file_argument::INPUT_FILE_TYPE_LIBRARY | |
854 | : Input_file_argument::INPUT_FILE_TYPE_FILE), | |
42218b9f RÁE |
855 | (is_lib |
856 | ? this->extra_search_path_.c_str() | |
857 | : ""), | |
858 | false, | |
859 | this->options_); | |
89fc3421 CC |
860 | Input_argument* input_argument = new Input_argument(file); |
861 | Task_token* next_blocker = new Task_token(true); | |
862 | next_blocker->add_blocker(); | |
8c21d9d3 | 863 | if (parameters->incremental()) |
40f36857 CC |
864 | gold_error(_("input files added by plug-ins in --incremental mode not " |
865 | "supported yet")); | |
f1ed28fb | 866 | this->workqueue_->queue_soon(new Read_symbols(this->input_objects_, |
89fc3421 CC |
867 | this->symtab_, |
868 | this->layout_, | |
869 | this->dirpath_, | |
15f8229b | 870 | 0, |
89fc3421 CC |
871 | this->mapfile_, |
872 | input_argument, | |
873 | NULL, | |
b0193076 | 874 | NULL, |
89fc3421 CC |
875 | this->this_blocker_, |
876 | next_blocker)); | |
877 | this->this_blocker_ = next_blocker; | |
0f3b89d8 | 878 | this->any_added_ = true; |
89fc3421 CC |
879 | return LDPS_OK; |
880 | } | |
881 | ||
882 | // Class Pluginobj. | |
883 | ||
2ea97941 ILT |
884 | Pluginobj::Pluginobj(const std::string& name, Input_file* input_file, |
885 | off_t offset, off_t filesize) | |
886 | : Object(name, input_file, false, offset), | |
887 | nsyms_(0), syms_(NULL), symbols_(), filesize_(filesize), comdat_map_() | |
89fc3421 CC |
888 | { |
889 | } | |
890 | ||
235061c2 | 891 | // Return TRUE if a defined symbol is referenced from outside the |
f7c5b166 CC |
892 | // universe of claimed objects. Only references from relocatable, |
893 | // non-IR (unclaimed) objects count as a reference. References from | |
894 | // dynamic objects count only as "visible". | |
d66a9eb3 CC |
895 | |
896 | static inline bool | |
235061c2 | 897 | is_referenced_from_outside(Symbol* lsym) |
d66a9eb3 CC |
898 | { |
899 | if (lsym->in_real_elf()) | |
900 | return true; | |
901 | if (parameters->options().relocatable()) | |
902 | return true; | |
84ced98a RÁE |
903 | if (parameters->options().is_undefined(lsym->name())) |
904 | return true; | |
235061c2 CC |
905 | return false; |
906 | } | |
907 | ||
908 | // Return TRUE if a defined symbol might be reachable from outside the | |
909 | // load module. | |
910 | ||
911 | static inline bool | |
912 | is_visible_from_outside(Symbol* lsym) | |
913 | { | |
f7c5b166 CC |
914 | if (lsym->in_dyn()) |
915 | return true; | |
d66a9eb3 CC |
916 | if (parameters->options().export_dynamic() || parameters->options().shared()) |
917 | return lsym->is_externally_visible(); | |
918 | return false; | |
919 | } | |
920 | ||
89fc3421 CC |
921 | // Get symbol resolution info. |
922 | ||
923 | ld_plugin_status | |
3c537f7f PC |
924 | Pluginobj::get_symbol_resolution_info(Symbol_table* symtab, |
925 | int nsyms, | |
235061c2 CC |
926 | ld_plugin_symbol* syms, |
927 | int version) const | |
928 | { | |
929 | // For version 1 of this interface, we cannot use | |
930 | // LDPR_PREVAILING_DEF_IRONLY_EXP, so we return LDPR_PREVAILING_DEF | |
931 | // instead. | |
932 | const ld_plugin_symbol_resolution ldpr_prevailing_def_ironly_exp | |
933 | = (version > 1 | |
934 | ? LDPR_PREVAILING_DEF_IRONLY_EXP | |
935 | : LDPR_PREVAILING_DEF); | |
936 | ||
abc8dcba | 937 | if (nsyms > this->nsyms_) |
89fc3421 | 938 | return LDPS_NO_SYMS; |
b0193076 RÁE |
939 | |
940 | if (static_cast<size_t>(nsyms) > this->symbols_.size()) | |
941 | { | |
942 | // We never decided to include this object. We mark all symbols as | |
943 | // preempted. | |
ca09d69a | 944 | gold_assert(this->symbols_.size() == 0); |
b0193076 RÁE |
945 | for (int i = 0; i < nsyms; i++) |
946 | syms[i].resolution = LDPR_PREEMPTED_REG; | |
95ecdfbf | 947 | return version > 2 ? LDPS_NO_SYMS : LDPS_OK; |
b0193076 RÁE |
948 | } |
949 | ||
89fc3421 CC |
950 | for (int i = 0; i < nsyms; i++) |
951 | { | |
952 | ld_plugin_symbol* isym = &syms[i]; | |
953 | Symbol* lsym = this->symbols_[i]; | |
3c537f7f PC |
954 | if (lsym->is_forwarder()) |
955 | lsym = symtab->resolve_forwards(lsym); | |
89fc3421 CC |
956 | ld_plugin_symbol_resolution res = LDPR_UNKNOWN; |
957 | ||
958 | if (lsym->is_undefined()) | |
959 | // The symbol remains undefined. | |
960 | res = LDPR_UNDEF; | |
961 | else if (isym->def == LDPK_UNDEF | |
962 | || isym->def == LDPK_WEAKUNDEF | |
963 | || isym->def == LDPK_COMMON) | |
964 | { | |
965 | // The original symbol was undefined or common. | |
966 | if (lsym->source() != Symbol::FROM_OBJECT) | |
967 | res = LDPR_RESOLVED_EXEC; | |
be234d88 | 968 | else if (lsym->object()->pluginobj() == this) |
235061c2 CC |
969 | { |
970 | if (is_referenced_from_outside(lsym)) | |
971 | res = LDPR_PREVAILING_DEF; | |
972 | else if (is_visible_from_outside(lsym)) | |
973 | res = ldpr_prevailing_def_ironly_exp; | |
974 | else | |
975 | res = LDPR_PREVAILING_DEF_IRONLY; | |
976 | } | |
89fc3421 CC |
977 | else if (lsym->object()->pluginobj() != NULL) |
978 | res = LDPR_RESOLVED_IR; | |
979 | else if (lsym->object()->is_dynamic()) | |
980 | res = LDPR_RESOLVED_DYN; | |
981 | else | |
982 | res = LDPR_RESOLVED_EXEC; | |
983 | } | |
984 | else | |
985 | { | |
986 | // The original symbol was a definition. | |
987 | if (lsym->source() != Symbol::FROM_OBJECT) | |
988 | res = LDPR_PREEMPTED_REG; | |
989 | else if (lsym->object() == static_cast<const Object*>(this)) | |
235061c2 CC |
990 | { |
991 | if (is_referenced_from_outside(lsym)) | |
992 | res = LDPR_PREVAILING_DEF; | |
993 | else if (is_visible_from_outside(lsym)) | |
994 | res = ldpr_prevailing_def_ironly_exp; | |
995 | else | |
996 | res = LDPR_PREVAILING_DEF_IRONLY; | |
997 | } | |
89fc3421 CC |
998 | else |
999 | res = (lsym->object()->pluginobj() != NULL | |
1000 | ? LDPR_PREEMPTED_IR | |
1001 | : LDPR_PREEMPTED_REG); | |
1002 | } | |
1003 | isym->resolution = res; | |
1004 | } | |
1005 | return LDPS_OK; | |
1006 | } | |
1007 | ||
1008 | // Return TRUE if the comdat group with key COMDAT_KEY from this object | |
1009 | // should be kept. | |
1010 | ||
1011 | bool | |
2ea97941 | 1012 | Pluginobj::include_comdat_group(std::string comdat_key, Layout* layout) |
89fc3421 CC |
1013 | { |
1014 | std::pair<Comdat_map::iterator, bool> ins = | |
1015 | this->comdat_map_.insert(std::make_pair(comdat_key, false)); | |
1016 | ||
1017 | // If this is the first time we've seen this comdat key, ask the | |
1018 | // layout object whether it should be included. | |
1019 | if (ins.second) | |
2ea97941 ILT |
1020 | ins.first->second = layout->find_or_add_kept_section(comdat_key, |
1021 | NULL, 0, true, | |
1022 | true, NULL); | |
89fc3421 CC |
1023 | |
1024 | return ins.first->second; | |
1025 | } | |
1026 | ||
1027 | // Class Sized_pluginobj. | |
1028 | ||
1029 | template<int size, bool big_endian> | |
1030 | Sized_pluginobj<size, big_endian>::Sized_pluginobj( | |
2ea97941 ILT |
1031 | const std::string& name, |
1032 | Input_file* input_file, | |
1033 | off_t offset, | |
1034 | off_t filesize) | |
1035 | : Pluginobj(name, input_file, offset, filesize) | |
89fc3421 CC |
1036 | { |
1037 | } | |
1038 | ||
1039 | // Read the symbols. Not used for plugin objects. | |
1040 | ||
1041 | template<int size, bool big_endian> | |
1042 | void | |
1043 | Sized_pluginobj<size, big_endian>::do_read_symbols(Read_symbols_data*) | |
1044 | { | |
1045 | gold_unreachable(); | |
1046 | } | |
1047 | ||
1048 | // Lay out the input sections. Not used for plugin objects. | |
1049 | ||
1050 | template<int size, bool big_endian> | |
1051 | void | |
1052 | Sized_pluginobj<size, big_endian>::do_layout(Symbol_table*, Layout*, | |
1053 | Read_symbols_data*) | |
1054 | { | |
1055 | gold_unreachable(); | |
1056 | } | |
1057 | ||
1058 | // Add the symbols to the symbol table. | |
1059 | ||
89fc3421 CC |
1060 | template<int size, bool big_endian> |
1061 | void | |
1062 | Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table* symtab, | |
f488e4b0 | 1063 | Read_symbols_data*, |
2ea97941 | 1064 | Layout* layout) |
89fc3421 CC |
1065 | { |
1066 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1067 | unsigned char symbuf[sym_size]; | |
1068 | elfcpp::Sym<size, big_endian> sym(symbuf); | |
1069 | elfcpp::Sym_write<size, big_endian> osym(symbuf); | |
1070 | ||
89fc3421 CC |
1071 | this->symbols_.resize(this->nsyms_); |
1072 | ||
1073 | for (int i = 0; i < this->nsyms_; ++i) | |
1074 | { | |
ca09d69a | 1075 | const struct ld_plugin_symbol* isym = &this->syms_[i]; |
2ea97941 | 1076 | const char* name = isym->name; |
89fc3421 CC |
1077 | const char* ver = isym->version; |
1078 | elfcpp::Elf_Half shndx; | |
1079 | elfcpp::STB bind; | |
1080 | elfcpp::STV vis; | |
1081 | ||
2ea97941 ILT |
1082 | if (name != NULL && name[0] == '\0') |
1083 | name = NULL; | |
89fc3421 CC |
1084 | if (ver != NULL && ver[0] == '\0') |
1085 | ver = NULL; | |
1086 | ||
1087 | switch (isym->def) | |
1088 | { | |
1089 | case LDPK_WEAKDEF: | |
1090 | case LDPK_WEAKUNDEF: | |
1091 | bind = elfcpp::STB_WEAK; | |
1092 | break; | |
1093 | case LDPK_DEF: | |
1094 | case LDPK_UNDEF: | |
1095 | case LDPK_COMMON: | |
1096 | default: | |
1097 | bind = elfcpp::STB_GLOBAL; | |
1098 | break; | |
1099 | } | |
1100 | ||
1101 | switch (isym->def) | |
1102 | { | |
1103 | case LDPK_DEF: | |
1104 | case LDPK_WEAKDEF: | |
1105 | shndx = elfcpp::SHN_ABS; | |
1106 | break; | |
1107 | case LDPK_COMMON: | |
1108 | shndx = elfcpp::SHN_COMMON; | |
1109 | break; | |
1110 | case LDPK_UNDEF: | |
1111 | case LDPK_WEAKUNDEF: | |
1112 | default: | |
1113 | shndx = elfcpp::SHN_UNDEF; | |
1114 | break; | |
1115 | } | |
1116 | ||
1117 | switch (isym->visibility) | |
1118 | { | |
1119 | case LDPV_PROTECTED: | |
105b6afd | 1120 | vis = elfcpp::STV_PROTECTED; |
89fc3421 CC |
1121 | break; |
1122 | case LDPV_INTERNAL: | |
105b6afd | 1123 | vis = elfcpp::STV_INTERNAL; |
89fc3421 CC |
1124 | break; |
1125 | case LDPV_HIDDEN: | |
105b6afd | 1126 | vis = elfcpp::STV_HIDDEN; |
89fc3421 CC |
1127 | break; |
1128 | case LDPV_DEFAULT: | |
1129 | default: | |
1130 | vis = elfcpp::STV_DEFAULT; | |
1131 | break; | |
1132 | } | |
1133 | ||
1134 | if (isym->comdat_key != NULL | |
1135 | && isym->comdat_key[0] != '\0' | |
2ea97941 | 1136 | && !this->include_comdat_group(isym->comdat_key, layout)) |
89fc3421 CC |
1137 | shndx = elfcpp::SHN_UNDEF; |
1138 | ||
1139 | osym.put_st_name(0); | |
1140 | osym.put_st_value(0); | |
6168c2a1 | 1141 | osym.put_st_size(0); |
89fc3421 CC |
1142 | osym.put_st_info(bind, elfcpp::STT_NOTYPE); |
1143 | osym.put_st_other(vis, 0); | |
1144 | osym.put_st_shndx(shndx); | |
1145 | ||
1146 | this->symbols_[i] = | |
2ea97941 | 1147 | symtab->add_from_pluginobj<size, big_endian>(this, name, ver, &sym); |
89fc3421 CC |
1148 | } |
1149 | } | |
1150 | ||
b0193076 RÁE |
1151 | template<int size, bool big_endian> |
1152 | Archive::Should_include | |
1153 | Sized_pluginobj<size, big_endian>::do_should_include_member( | |
88a4108b ILT |
1154 | Symbol_table* symtab, |
1155 | Layout* layout, | |
1156 | Read_symbols_data*, | |
1157 | std::string* why) | |
b0193076 RÁE |
1158 | { |
1159 | char* tmpbuf = NULL; | |
1160 | size_t tmpbuflen = 0; | |
1161 | ||
88a4108b ILT |
1162 | for (int i = 0; i < this->nsyms_; ++i) |
1163 | { | |
1164 | const struct ld_plugin_symbol& sym = this->syms_[i]; | |
1165 | const char* name = sym.name; | |
1166 | Symbol* symbol; | |
1167 | Archive::Should_include t = Archive::should_include_member(symtab, | |
1168 | layout, | |
1169 | name, | |
1170 | &symbol, why, | |
1171 | &tmpbuf, | |
1172 | &tmpbuflen); | |
b0193076 RÁE |
1173 | if (t == Archive::SHOULD_INCLUDE_YES) |
1174 | { | |
1175 | if (tmpbuf != NULL) | |
1176 | free(tmpbuf); | |
1177 | return t; | |
1178 | } | |
88a4108b | 1179 | } |
b0193076 RÁE |
1180 | if (tmpbuf != NULL) |
1181 | free(tmpbuf); | |
1182 | return Archive::SHOULD_INCLUDE_UNKNOWN; | |
1183 | } | |
1184 | ||
e0c52780 CC |
1185 | // Iterate over global symbols, calling a visitor class V for each. |
1186 | ||
1187 | template<int size, bool big_endian> | |
1188 | void | |
1189 | Sized_pluginobj<size, big_endian>::do_for_all_global_symbols( | |
1190 | Read_symbols_data*, | |
1191 | Library_base::Symbol_visitor_base* v) | |
1192 | { | |
1193 | for (int i = 0; i < this->nsyms_; ++i) | |
1194 | { | |
1195 | const struct ld_plugin_symbol& sym = this->syms_[i]; | |
1196 | if (sym.def != LDPK_UNDEF) | |
1197 | v->visit(sym.name); | |
1198 | } | |
1199 | } | |
1200 | ||
cdc29364 CC |
1201 | // Iterate over local symbols, calling a visitor class V for each GOT offset |
1202 | // associated with a local symbol. | |
1203 | template<int size, bool big_endian> | |
1204 | void | |
1205 | Sized_pluginobj<size, big_endian>::do_for_all_local_got_entries( | |
1206 | Got_offset_list::Visitor*) const | |
1207 | { | |
1208 | gold_unreachable(); | |
1209 | } | |
1210 | ||
89fc3421 CC |
1211 | // Get the size of a section. Not used for plugin objects. |
1212 | ||
1213 | template<int size, bool big_endian> | |
1214 | uint64_t | |
1215 | Sized_pluginobj<size, big_endian>::do_section_size(unsigned int) | |
1216 | { | |
1217 | gold_unreachable(); | |
1218 | return 0; | |
1219 | } | |
1220 | ||
1221 | // Get the name of a section. Not used for plugin objects. | |
1222 | ||
1223 | template<int size, bool big_endian> | |
1224 | std::string | |
54674d38 | 1225 | Sized_pluginobj<size, big_endian>::do_section_name(unsigned int) const |
89fc3421 CC |
1226 | { |
1227 | gold_unreachable(); | |
1228 | return std::string(); | |
1229 | } | |
1230 | ||
1231 | // Return a view of the contents of a section. Not used for plugin objects. | |
1232 | ||
1233 | template<int size, bool big_endian> | |
c1027032 CC |
1234 | const unsigned char* |
1235 | Sized_pluginobj<size, big_endian>::do_section_contents( | |
1236 | unsigned int, | |
1237 | section_size_type*, | |
1238 | bool) | |
89fc3421 | 1239 | { |
89fc3421 | 1240 | gold_unreachable(); |
c1027032 | 1241 | return NULL; |
89fc3421 CC |
1242 | } |
1243 | ||
1244 | // Return section flags. Not used for plugin objects. | |
1245 | ||
1246 | template<int size, bool big_endian> | |
1247 | uint64_t | |
1248 | Sized_pluginobj<size, big_endian>::do_section_flags(unsigned int) | |
1249 | { | |
1250 | gold_unreachable(); | |
1251 | return 0; | |
1252 | } | |
1253 | ||
ef15dade ST |
1254 | // Return section entsize. Not used for plugin objects. |
1255 | ||
1256 | template<int size, bool big_endian> | |
1257 | uint64_t | |
1258 | Sized_pluginobj<size, big_endian>::do_section_entsize(unsigned int) | |
1259 | { | |
1260 | gold_unreachable(); | |
1261 | return 0; | |
1262 | } | |
1263 | ||
89fc3421 CC |
1264 | // Return section address. Not used for plugin objects. |
1265 | ||
1266 | template<int size, bool big_endian> | |
1267 | uint64_t | |
1268 | Sized_pluginobj<size, big_endian>::do_section_address(unsigned int) | |
1269 | { | |
1270 | gold_unreachable(); | |
1271 | return 0; | |
1272 | } | |
1273 | ||
1274 | // Return section type. Not used for plugin objects. | |
1275 | ||
1276 | template<int size, bool big_endian> | |
1277 | unsigned int | |
1278 | Sized_pluginobj<size, big_endian>::do_section_type(unsigned int) | |
1279 | { | |
1280 | gold_unreachable(); | |
1281 | return 0; | |
1282 | } | |
1283 | ||
1284 | // Return the section link field. Not used for plugin objects. | |
1285 | ||
1286 | template<int size, bool big_endian> | |
1287 | unsigned int | |
1288 | Sized_pluginobj<size, big_endian>::do_section_link(unsigned int) | |
1289 | { | |
1290 | gold_unreachable(); | |
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | // Return the section link field. Not used for plugin objects. | |
1295 | ||
1296 | template<int size, bool big_endian> | |
1297 | unsigned int | |
1298 | Sized_pluginobj<size, big_endian>::do_section_info(unsigned int) | |
1299 | { | |
1300 | gold_unreachable(); | |
1301 | return 0; | |
1302 | } | |
1303 | ||
1304 | // Return the section alignment. Not used for plugin objects. | |
1305 | ||
1306 | template<int size, bool big_endian> | |
1307 | uint64_t | |
1308 | Sized_pluginobj<size, big_endian>::do_section_addralign(unsigned int) | |
1309 | { | |
1310 | gold_unreachable(); | |
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | // Return the Xindex structure to use. Not used for plugin objects. | |
1315 | ||
1316 | template<int size, bool big_endian> | |
1317 | Xindex* | |
1318 | Sized_pluginobj<size, big_endian>::do_initialize_xindex() | |
1319 | { | |
1320 | gold_unreachable(); | |
1321 | return NULL; | |
1322 | } | |
1323 | ||
53bbcc1b CC |
1324 | // Get symbol counts. Don't count plugin objects; the replacement |
1325 | // files will provide the counts. | |
89fc3421 CC |
1326 | |
1327 | template<int size, bool big_endian> | |
1328 | void | |
53bbcc1b CC |
1329 | Sized_pluginobj<size, big_endian>::do_get_global_symbol_counts( |
1330 | const Symbol_table*, | |
1331 | size_t* defined, | |
1332 | size_t* used) const | |
89fc3421 | 1333 | { |
53bbcc1b CC |
1334 | *defined = 0; |
1335 | *used = 0; | |
89fc3421 CC |
1336 | } |
1337 | ||
dde3f402 ILT |
1338 | // Get symbols. Not used for plugin objects. |
1339 | ||
1340 | template<int size, bool big_endian> | |
1341 | const Object::Symbols* | |
1342 | Sized_pluginobj<size, big_endian>::do_get_global_symbols() const | |
1343 | { | |
1344 | gold_unreachable(); | |
1345 | } | |
1346 | ||
5995b570 | 1347 | // Class Plugin_finish. This task runs after all replacement files have |
78384e8f CC |
1348 | // been added. For now, it's a placeholder for a possible plugin API |
1349 | // to allow the plugin to release most of its resources. The cleanup | |
1350 | // handlers must be called later, because they can remove the temporary | |
1351 | // object files that are needed until the end of the link. | |
89fc3421 | 1352 | |
5995b570 | 1353 | class Plugin_finish : public Task |
89fc3421 CC |
1354 | { |
1355 | public: | |
5995b570 | 1356 | Plugin_finish(Task_token* this_blocker, Task_token* next_blocker) |
89fc3421 CC |
1357 | : this_blocker_(this_blocker), next_blocker_(next_blocker) |
1358 | { } | |
1359 | ||
5995b570 | 1360 | ~Plugin_finish() |
89fc3421 CC |
1361 | { |
1362 | if (this->this_blocker_ != NULL) | |
1363 | delete this->this_blocker_; | |
1364 | } | |
1365 | ||
1366 | Task_token* | |
1367 | is_runnable() | |
1368 | { | |
1369 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
1370 | return this->this_blocker_; | |
1371 | return NULL; | |
1372 | } | |
1373 | ||
1374 | void | |
1375 | locks(Task_locker* tl) | |
1376 | { tl->add(this, this->next_blocker_); } | |
1377 | ||
1378 | void | |
1379 | run(Workqueue*) | |
483620e8 | 1380 | { |
78384e8f | 1381 | // We could call early cleanup handlers here. |
483620e8 | 1382 | } |
89fc3421 CC |
1383 | |
1384 | std::string | |
1385 | get_name() const | |
5995b570 | 1386 | { return "Plugin_finish"; } |
89fc3421 CC |
1387 | |
1388 | private: | |
1389 | Task_token* this_blocker_; | |
1390 | Task_token* next_blocker_; | |
1391 | }; | |
1392 | ||
1393 | // Class Plugin_hook. | |
1394 | ||
1395 | Plugin_hook::~Plugin_hook() | |
1396 | { | |
1397 | } | |
1398 | ||
1399 | // Return whether a Plugin_hook task is runnable. | |
1400 | ||
1401 | Task_token* | |
1402 | Plugin_hook::is_runnable() | |
1403 | { | |
1404 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
1405 | return this->this_blocker_; | |
1406 | return NULL; | |
1407 | } | |
1408 | ||
1409 | // Return a Task_locker for a Plugin_hook task. We don't need any | |
1410 | // locks here. | |
1411 | ||
1412 | void | |
1413 | Plugin_hook::locks(Task_locker*) | |
1414 | { | |
1415 | } | |
1416 | ||
89fc3421 CC |
1417 | // Run the "all symbols read" plugin hook. |
1418 | ||
1419 | void | |
5995b570 | 1420 | Plugin_hook::run(Workqueue* workqueue) |
89fc3421 CC |
1421 | { |
1422 | gold_assert(this->options_.has_plugins()); | |
a10ae760 | 1423 | Symbol* start_sym = this->symtab_->lookup(parameters->entry()); |
91ff43fe RÁE |
1424 | if (start_sym != NULL) |
1425 | start_sym->set_in_real_elf(); | |
1426 | ||
89fc3421 | 1427 | this->options_.plugins()->all_symbols_read(workqueue, |
0f7c0701 | 1428 | this, |
89fc3421 CC |
1429 | this->input_objects_, |
1430 | this->symtab_, | |
89fc3421 CC |
1431 | this->dirpath_, |
1432 | this->mapfile_, | |
1433 | &this->this_blocker_); | |
5995b570 CC |
1434 | workqueue->queue_soon(new Plugin_finish(this->this_blocker_, |
1435 | this->next_blocker_)); | |
89fc3421 CC |
1436 | } |
1437 | ||
1438 | // The C interface routines called by the plugins. | |
1439 | ||
1440 | #ifdef ENABLE_PLUGINS | |
1441 | ||
1442 | // Register a claim-file handler. | |
1443 | ||
1444 | static enum ld_plugin_status | |
1445 | register_claim_file(ld_plugin_claim_file_handler handler) | |
1446 | { | |
1447 | gold_assert(parameters->options().has_plugins()); | |
1448 | parameters->options().plugins()->set_claim_file_handler(handler); | |
1449 | return LDPS_OK; | |
1450 | } | |
1451 | ||
1452 | // Register an all-symbols-read handler. | |
1453 | ||
1454 | static enum ld_plugin_status | |
1455 | register_all_symbols_read(ld_plugin_all_symbols_read_handler handler) | |
1456 | { | |
1457 | gold_assert(parameters->options().has_plugins()); | |
1458 | parameters->options().plugins()->set_all_symbols_read_handler(handler); | |
1459 | return LDPS_OK; | |
1460 | } | |
1461 | ||
1462 | // Register a cleanup handler. | |
1463 | ||
1464 | static enum ld_plugin_status | |
1465 | register_cleanup(ld_plugin_cleanup_handler handler) | |
1466 | { | |
1467 | gold_assert(parameters->options().has_plugins()); | |
1468 | parameters->options().plugins()->set_cleanup_handler(handler); | |
1469 | return LDPS_OK; | |
1470 | } | |
1471 | ||
1472 | // Add symbols from a plugin-claimed input file. | |
1473 | ||
1474 | static enum ld_plugin_status | |
ca09d69a | 1475 | add_symbols(void* handle, int nsyms, const ld_plugin_symbol* syms) |
89fc3421 CC |
1476 | { |
1477 | gold_assert(parameters->options().has_plugins()); | |
1478 | Pluginobj* obj = parameters->options().plugins()->make_plugin_object( | |
1479 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
1480 | if (obj == NULL) | |
1481 | return LDPS_ERR; | |
1482 | obj->store_incoming_symbols(nsyms, syms); | |
1483 | return LDPS_OK; | |
1484 | } | |
1485 | ||
0f7c0701 CC |
1486 | // Get the input file information with an open (possibly re-opened) |
1487 | // file descriptor. | |
1488 | ||
1489 | static enum ld_plugin_status | |
ca09d69a | 1490 | get_input_file(const void* handle, struct ld_plugin_input_file* file) |
0f7c0701 CC |
1491 | { |
1492 | gold_assert(parameters->options().has_plugins()); | |
1493 | unsigned int obj_index = | |
1494 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
1495 | return parameters->options().plugins()->get_input_file(obj_index, file); | |
1496 | } | |
1497 | ||
1498 | // Release the input file. | |
1499 | ||
1500 | static enum ld_plugin_status | |
ca09d69a | 1501 | release_input_file(const void* handle) |
0f7c0701 CC |
1502 | { |
1503 | gold_assert(parameters->options().has_plugins()); | |
1504 | unsigned int obj_index = | |
1505 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
1506 | return parameters->options().plugins()->release_input_file(obj_index); | |
1507 | } | |
1508 | ||
9c793f14 RÁE |
1509 | static enum ld_plugin_status |
1510 | get_view(const void *handle, const void **viewp) | |
1511 | { | |
1512 | gold_assert(parameters->options().has_plugins()); | |
1513 | unsigned int obj_index = | |
1514 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
1515 | return parameters->options().plugins()->get_view(obj_index, viewp); | |
1516 | } | |
1517 | ||
89fc3421 CC |
1518 | // Get the symbol resolution info for a plugin-claimed input file. |
1519 | ||
1520 | static enum ld_plugin_status | |
ca09d69a | 1521 | get_symbols(const void* handle, int nsyms, ld_plugin_symbol* syms) |
89fc3421 CC |
1522 | { |
1523 | gold_assert(parameters->options().has_plugins()); | |
3c537f7f PC |
1524 | Plugin_manager* plugins = parameters->options().plugins(); |
1525 | Object* obj = plugins->object( | |
e9552f7e | 1526 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); |
89fc3421 CC |
1527 | if (obj == NULL) |
1528 | return LDPS_ERR; | |
e9552f7e ST |
1529 | Pluginobj* plugin_obj = obj->pluginobj(); |
1530 | if (plugin_obj == NULL) | |
1531 | return LDPS_ERR; | |
3c537f7f PC |
1532 | Symbol_table* symtab = plugins->symtab(); |
1533 | return plugin_obj->get_symbol_resolution_info(symtab, nsyms, syms, 1); | |
235061c2 CC |
1534 | } |
1535 | ||
1536 | // Version 2 of the above. The only difference is that this version | |
1537 | // is allowed to return the resolution code LDPR_PREVAILING_DEF_IRONLY_EXP. | |
1538 | ||
1539 | static enum ld_plugin_status | |
1540 | get_symbols_v2(const void* handle, int nsyms, ld_plugin_symbol* syms) | |
1541 | { | |
1542 | gold_assert(parameters->options().has_plugins()); | |
3c537f7f PC |
1543 | Plugin_manager* plugins = parameters->options().plugins(); |
1544 | Object* obj = plugins->object( | |
235061c2 CC |
1545 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); |
1546 | if (obj == NULL) | |
1547 | return LDPS_ERR; | |
1548 | Pluginobj* plugin_obj = obj->pluginobj(); | |
1549 | if (plugin_obj == NULL) | |
1550 | return LDPS_ERR; | |
3c537f7f PC |
1551 | Symbol_table* symtab = plugins->symtab(); |
1552 | return plugin_obj->get_symbol_resolution_info(symtab, nsyms, syms, 2); | |
89fc3421 CC |
1553 | } |
1554 | ||
95ecdfbf ES |
1555 | // Version 3 of the above. The only difference from v2 is that it |
1556 | // returns LDPS_NO_SYMS instead of LDPS_OK for the objects we never | |
1557 | // decided to include. | |
1558 | ||
1559 | static enum ld_plugin_status | |
1560 | get_symbols_v3(const void* handle, int nsyms, ld_plugin_symbol* syms) | |
1561 | { | |
1562 | gold_assert(parameters->options().has_plugins()); | |
1563 | Plugin_manager* plugins = parameters->options().plugins(); | |
1564 | Object* obj = plugins->object( | |
1565 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
1566 | if (obj == NULL) | |
1567 | return LDPS_ERR; | |
1568 | Pluginobj* plugin_obj = obj->pluginobj(); | |
1569 | if (plugin_obj == NULL) | |
1570 | return LDPS_ERR; | |
1571 | Symbol_table* symtab = plugins->symtab(); | |
1572 | return plugin_obj->get_symbol_resolution_info(symtab, nsyms, syms, 3); | |
1573 | } | |
1574 | ||
89fc3421 CC |
1575 | // Add a new (real) input file generated by a plugin. |
1576 | ||
1577 | static enum ld_plugin_status | |
ca09d69a | 1578 | add_input_file(const char* pathname) |
89fc3421 CC |
1579 | { |
1580 | gold_assert(parameters->options().has_plugins()); | |
e99daf92 ILT |
1581 | return parameters->options().plugins()->add_input_file(pathname, false); |
1582 | } | |
1583 | ||
1584 | // Add a new (real) library required by a plugin. | |
1585 | ||
1586 | static enum ld_plugin_status | |
ca09d69a | 1587 | add_input_library(const char* pathname) |
e99daf92 ILT |
1588 | { |
1589 | gold_assert(parameters->options().has_plugins()); | |
1590 | return parameters->options().plugins()->add_input_file(pathname, true); | |
89fc3421 CC |
1591 | } |
1592 | ||
42218b9f RÁE |
1593 | // Set the extra library path to be used by libraries added via |
1594 | // add_input_library | |
1595 | ||
1596 | static enum ld_plugin_status | |
ca09d69a | 1597 | set_extra_library_path(const char* path) |
42218b9f RÁE |
1598 | { |
1599 | gold_assert(parameters->options().has_plugins()); | |
1600 | return parameters->options().plugins()->set_extra_library_path(path); | |
1601 | } | |
1602 | ||
89fc3421 CC |
1603 | // Issue a diagnostic message from a plugin. |
1604 | ||
1605 | static enum ld_plugin_status | |
ca09d69a | 1606 | message(int level, const char* format, ...) |
89fc3421 CC |
1607 | { |
1608 | va_list args; | |
1609 | va_start(args, format); | |
1610 | ||
1611 | switch (level) | |
1612 | { | |
1613 | case LDPL_INFO: | |
1614 | parameters->errors()->info(format, args); | |
1615 | break; | |
1616 | case LDPL_WARNING: | |
1617 | parameters->errors()->warning(format, args); | |
1618 | break; | |
1619 | case LDPL_ERROR: | |
1620 | default: | |
1621 | parameters->errors()->error(format, args); | |
1622 | break; | |
1623 | case LDPL_FATAL: | |
1624 | parameters->errors()->fatal(format, args); | |
1625 | break; | |
1626 | } | |
1627 | ||
1628 | va_end(args); | |
1629 | return LDPS_OK; | |
1630 | } | |
1631 | ||
e9552f7e ST |
1632 | // Get the section count of the object corresponding to the handle. This |
1633 | // plugin interface can only be called in the claim_file handler of the plugin. | |
1634 | ||
1635 | static enum ld_plugin_status | |
1636 | get_input_section_count(const void* handle, unsigned int* count) | |
1637 | { | |
1638 | gold_assert(parameters->options().has_plugins()); | |
1639 | ||
1640 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1641 | return LDPS_ERR; | |
1642 | ||
1643 | Object* obj = parameters->options().plugins()->get_elf_object(handle); | |
1644 | ||
1645 | if (obj == NULL) | |
1646 | return LDPS_ERR; | |
1647 | ||
1648 | *count = obj->shnum(); | |
1649 | return LDPS_OK; | |
1650 | } | |
1651 | ||
1652 | // Get the type of the specified section in the object corresponding | |
1653 | // to the handle. This plugin interface can only be called in the | |
1654 | // claim_file handler of the plugin. | |
1655 | ||
1656 | static enum ld_plugin_status | |
1657 | get_input_section_type(const struct ld_plugin_section section, | |
1658 | unsigned int* type) | |
1659 | { | |
1660 | gold_assert(parameters->options().has_plugins()); | |
1661 | ||
1662 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1663 | return LDPS_ERR; | |
1664 | ||
1665 | Object* obj | |
1666 | = parameters->options().plugins()->get_elf_object(section.handle); | |
1667 | ||
1668 | if (obj == NULL) | |
1669 | return LDPS_BAD_HANDLE; | |
1670 | ||
1671 | *type = obj->section_type(section.shndx); | |
1672 | return LDPS_OK; | |
1673 | } | |
1674 | ||
1675 | // Get the name of the specified section in the object corresponding | |
1676 | // to the handle. This plugin interface can only be called in the | |
1677 | // claim_file handler of the plugin. | |
1678 | ||
1679 | static enum ld_plugin_status | |
1680 | get_input_section_name(const struct ld_plugin_section section, | |
1681 | char** section_name_ptr) | |
1682 | { | |
1683 | gold_assert(parameters->options().has_plugins()); | |
1684 | ||
1685 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1686 | return LDPS_ERR; | |
1687 | ||
1688 | Object* obj | |
1689 | = parameters->options().plugins()->get_elf_object(section.handle); | |
1690 | ||
1691 | if (obj == NULL) | |
1692 | return LDPS_BAD_HANDLE; | |
1693 | ||
1694 | // Check if the object is locked before getting the section name. | |
1695 | gold_assert(obj->is_locked()); | |
1696 | ||
1697 | const std::string section_name = obj->section_name(section.shndx); | |
1698 | *section_name_ptr = static_cast<char*>(malloc(section_name.length() + 1)); | |
1699 | memcpy(*section_name_ptr, section_name.c_str(), section_name.length() + 1); | |
1700 | return LDPS_OK; | |
1701 | } | |
1702 | ||
1703 | // Get the contents of the specified section in the object corresponding | |
1704 | // to the handle. This plugin interface can only be called in the | |
1705 | // claim_file handler of the plugin. | |
1706 | ||
1707 | static enum ld_plugin_status | |
1708 | get_input_section_contents(const struct ld_plugin_section section, | |
1709 | const unsigned char** section_contents_ptr, | |
1710 | size_t* len) | |
1711 | { | |
1712 | gold_assert(parameters->options().has_plugins()); | |
1713 | ||
1714 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1715 | return LDPS_ERR; | |
1716 | ||
1717 | Object* obj | |
1718 | = parameters->options().plugins()->get_elf_object(section.handle); | |
1719 | ||
1720 | if (obj == NULL) | |
1721 | return LDPS_BAD_HANDLE; | |
1722 | ||
1723 | // Check if the object is locked before getting the section contents. | |
1724 | gold_assert(obj->is_locked()); | |
1725 | ||
1726 | section_size_type plen; | |
1727 | *section_contents_ptr | |
1728 | = obj->section_contents(section.shndx, &plen, false); | |
1729 | *len = plen; | |
1730 | return LDPS_OK; | |
1731 | } | |
1732 | ||
1733 | // Specify the ordering of sections in the final layout. The sections are | |
1734 | // specified as (handle,shndx) pairs in the two arrays in the order in | |
1735 | // which they should appear in the final layout. | |
1736 | ||
1737 | static enum ld_plugin_status | |
f0558624 | 1738 | update_section_order(const struct ld_plugin_section* section_list, |
e9552f7e ST |
1739 | unsigned int num_sections) |
1740 | { | |
1741 | gold_assert(parameters->options().has_plugins()); | |
1742 | ||
1743 | if (num_sections == 0) | |
1744 | return LDPS_OK; | |
1745 | ||
1746 | if (section_list == NULL) | |
1747 | return LDPS_ERR; | |
1748 | ||
f0558624 ST |
1749 | Layout* layout = parameters->options().plugins()->layout(); |
1750 | gold_assert (layout != NULL); | |
e9552f7e | 1751 | |
f0558624 ST |
1752 | std::map<Section_id, unsigned int>* order_map |
1753 | = layout->get_section_order_map(); | |
1754 | ||
1755 | /* Store the mapping from Section_id to section position in layout's | |
1756 | order_map to consult after output sections are added. */ | |
e9552f7e ST |
1757 | for (unsigned int i = 0; i < num_sections; ++i) |
1758 | { | |
1759 | Object* obj = parameters->options().plugins()->get_elf_object( | |
1760 | section_list[i].handle); | |
efc6fa12 | 1761 | if (obj == NULL || obj->is_dynamic()) |
e9552f7e ST |
1762 | return LDPS_BAD_HANDLE; |
1763 | unsigned int shndx = section_list[i].shndx; | |
efc6fa12 | 1764 | Section_id secn_id(static_cast<Relobj*>(obj), shndx); |
f0558624 | 1765 | (*order_map)[secn_id] = i + 1; |
e9552f7e ST |
1766 | } |
1767 | ||
e9552f7e ST |
1768 | return LDPS_OK; |
1769 | } | |
1770 | ||
1771 | // Let the linker know that the sections could be reordered. | |
1772 | ||
1773 | static enum ld_plugin_status | |
1774 | allow_section_ordering() | |
1775 | { | |
1776 | gold_assert(parameters->options().has_plugins()); | |
1777 | Layout* layout = parameters->options().plugins()->layout(); | |
1778 | layout->set_section_ordering_specified(); | |
1779 | return LDPS_OK; | |
1780 | } | |
1781 | ||
16164a6b ST |
1782 | // Let the linker know that a subset of sections could be mapped |
1783 | // to a unique segment. | |
1784 | ||
1785 | static enum ld_plugin_status | |
1786 | allow_unique_segment_for_sections() | |
1787 | { | |
1788 | gold_assert(parameters->options().has_plugins()); | |
1789 | Layout* layout = parameters->options().plugins()->layout(); | |
1790 | layout->set_unique_segment_for_sections_specified(); | |
1791 | return LDPS_OK; | |
1792 | } | |
1793 | ||
1794 | // This function should map the list of sections specified in the | |
1795 | // SECTION_LIST to a unique segment. ELF segments do not have names | |
1796 | // and the NAME is used to identify Output Section which should contain | |
1797 | // the list of sections. This Output Section will then be mapped to | |
1798 | // a unique segment. FLAGS is used to specify if any additional segment | |
1799 | // flags need to be set. For instance, a specific segment flag can be | |
1800 | // set to identify this segment. Unsetting segment flags is not possible. | |
1801 | // ALIGN specifies the alignment of the segment. | |
1802 | ||
1803 | static enum ld_plugin_status | |
1804 | unique_segment_for_sections(const char* segment_name, | |
1805 | uint64_t flags, | |
1806 | uint64_t align, | |
1807 | const struct ld_plugin_section* section_list, | |
1808 | unsigned int num_sections) | |
1809 | { | |
1810 | gold_assert(parameters->options().has_plugins()); | |
1811 | ||
1812 | if (num_sections == 0) | |
1813 | return LDPS_OK; | |
1814 | ||
1815 | if (section_list == NULL) | |
1816 | return LDPS_ERR; | |
1817 | ||
1818 | Layout* layout = parameters->options().plugins()->layout(); | |
1819 | gold_assert (layout != NULL); | |
1820 | ||
1821 | Layout::Unique_segment_info* s = new Layout::Unique_segment_info; | |
1822 | s->name = segment_name; | |
1823 | s->flags = flags; | |
1824 | s->align = align; | |
1825 | ||
1826 | for (unsigned int i = 0; i < num_sections; ++i) | |
1827 | { | |
1828 | Object* obj = parameters->options().plugins()->get_elf_object( | |
1829 | section_list[i].handle); | |
efc6fa12 | 1830 | if (obj == NULL || obj->is_dynamic()) |
16164a6b ST |
1831 | return LDPS_BAD_HANDLE; |
1832 | unsigned int shndx = section_list[i].shndx; | |
efc6fa12 | 1833 | Const_section_id secn_id(static_cast<Relobj*>(obj), shndx); |
16164a6b ST |
1834 | layout->insert_section_segment_map(secn_id, s); |
1835 | } | |
1836 | ||
1837 | return LDPS_OK; | |
1838 | } | |
1839 | ||
89fc3421 CC |
1840 | #endif // ENABLE_PLUGINS |
1841 | ||
1842 | // Allocate a Pluginobj object of the appropriate size and endianness. | |
1843 | ||
1844 | static Pluginobj* | |
0f7c0701 | 1845 | make_sized_plugin_object(Input_file* input_file, off_t offset, off_t filesize) |
89fc3421 | 1846 | { |
89fc3421 CC |
1847 | Pluginobj* obj = NULL; |
1848 | ||
029ba973 ILT |
1849 | parameters_force_valid_target(); |
1850 | const Target& target(parameters->target()); | |
89fc3421 | 1851 | |
029ba973 | 1852 | if (target.get_size() == 32) |
89fc3421 | 1853 | { |
029ba973 | 1854 | if (target.is_big_endian()) |
92f03fcb | 1855 | #ifdef HAVE_TARGET_32_BIG |
89fc3421 | 1856 | obj = new Sized_pluginobj<32, true>(input_file->filename(), |
0f7c0701 | 1857 | input_file, offset, filesize); |
92f03fcb CC |
1858 | #else |
1859 | gold_error(_("%s: not configured to support " | |
1860 | "32-bit big-endian object"), | |
1861 | input_file->filename().c_str()); | |
89fc3421 | 1862 | #endif |
89fc3421 | 1863 | else |
92f03fcb | 1864 | #ifdef HAVE_TARGET_32_LITTLE |
89fc3421 | 1865 | obj = new Sized_pluginobj<32, false>(input_file->filename(), |
0f7c0701 | 1866 | input_file, offset, filesize); |
92f03fcb CC |
1867 | #else |
1868 | gold_error(_("%s: not configured to support " | |
1869 | "32-bit little-endian object"), | |
1870 | input_file->filename().c_str()); | |
89fc3421 CC |
1871 | #endif |
1872 | } | |
029ba973 | 1873 | else if (target.get_size() == 64) |
89fc3421 | 1874 | { |
029ba973 | 1875 | if (target.is_big_endian()) |
92f03fcb | 1876 | #ifdef HAVE_TARGET_64_BIG |
89fc3421 | 1877 | obj = new Sized_pluginobj<64, true>(input_file->filename(), |
0f7c0701 | 1878 | input_file, offset, filesize); |
92f03fcb CC |
1879 | #else |
1880 | gold_error(_("%s: not configured to support " | |
1881 | "64-bit big-endian object"), | |
1882 | input_file->filename().c_str()); | |
89fc3421 | 1883 | #endif |
89fc3421 | 1884 | else |
92f03fcb | 1885 | #ifdef HAVE_TARGET_64_LITTLE |
89fc3421 | 1886 | obj = new Sized_pluginobj<64, false>(input_file->filename(), |
0f7c0701 | 1887 | input_file, offset, filesize); |
92f03fcb CC |
1888 | #else |
1889 | gold_error(_("%s: not configured to support " | |
1890 | "64-bit little-endian object"), | |
1891 | input_file->filename().c_str()); | |
89fc3421 CC |
1892 | #endif |
1893 | } | |
1894 | ||
1895 | gold_assert(obj != NULL); | |
89fc3421 CC |
1896 | return obj; |
1897 | } | |
1898 | ||
1899 | } // End namespace gold. |