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6d03d481 | 1 | // plugin.cc -- plugin manager for gold -*- C++ -*- |
89fc3421 | 2 | |
0bf402d5 | 3 | // Copyright 2008, 2009, 2010, 2011, 2012, 2013 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" | |
74 | #include "elfcpp.h" | |
75 | ||
76 | namespace gold | |
77 | { | |
78 | ||
79 | #ifdef ENABLE_PLUGINS | |
80 | ||
81 | // The linker's exported interfaces. | |
82 | ||
83 | extern "C" | |
84 | { | |
85 | ||
86 | static enum ld_plugin_status | |
87 | register_claim_file(ld_plugin_claim_file_handler handler); | |
88 | ||
89 | static enum ld_plugin_status | |
90 | register_all_symbols_read(ld_plugin_all_symbols_read_handler handler); | |
91 | ||
92 | static enum ld_plugin_status | |
93 | register_cleanup(ld_plugin_cleanup_handler handler); | |
94 | ||
95 | static enum ld_plugin_status | |
96 | add_symbols(void *handle, int nsyms, const struct ld_plugin_symbol *syms); | |
97 | ||
0f7c0701 CC |
98 | static enum ld_plugin_status |
99 | get_input_file(const void *handle, struct ld_plugin_input_file *file); | |
100 | ||
9c793f14 RÁE |
101 | static enum ld_plugin_status |
102 | get_view(const void *handle, const void **viewp); | |
103 | ||
0f7c0701 CC |
104 | static enum ld_plugin_status |
105 | release_input_file(const void *handle); | |
106 | ||
89fc3421 CC |
107 | static enum ld_plugin_status |
108 | get_symbols(const void *handle, int nsyms, struct ld_plugin_symbol *syms); | |
109 | ||
235061c2 CC |
110 | static enum ld_plugin_status |
111 | get_symbols_v2(const void *handle, int nsyms, struct ld_plugin_symbol *syms); | |
112 | ||
89fc3421 | 113 | static enum ld_plugin_status |
6508b958 | 114 | add_input_file(const char *pathname); |
89fc3421 | 115 | |
e99daf92 | 116 | static enum ld_plugin_status |
6508b958 | 117 | add_input_library(const char *pathname); |
e99daf92 | 118 | |
42218b9f RÁE |
119 | static enum ld_plugin_status |
120 | set_extra_library_path(const char *path); | |
121 | ||
89fc3421 | 122 | static enum ld_plugin_status |
6c52134c | 123 | message(int level, const char *format, ...); |
89fc3421 | 124 | |
e9552f7e ST |
125 | static enum ld_plugin_status |
126 | get_input_section_count(const void* handle, unsigned int* count); | |
127 | ||
128 | static enum ld_plugin_status | |
129 | get_input_section_type(const struct ld_plugin_section section, | |
130 | unsigned int* type); | |
131 | ||
132 | static enum ld_plugin_status | |
133 | get_input_section_name(const struct ld_plugin_section section, | |
134 | char** section_name_ptr); | |
135 | ||
136 | static enum ld_plugin_status | |
137 | get_input_section_contents(const struct ld_plugin_section section, | |
138 | const unsigned char** section_contents, | |
139 | size_t* len); | |
140 | ||
141 | static enum ld_plugin_status | |
142 | update_section_order(const struct ld_plugin_section *section_list, | |
143 | unsigned int num_sections); | |
144 | ||
145 | static enum ld_plugin_status | |
146 | allow_section_ordering(); | |
147 | ||
16164a6b ST |
148 | static enum ld_plugin_status |
149 | allow_unique_segment_for_sections(); | |
150 | ||
151 | static enum ld_plugin_status | |
152 | unique_segment_for_sections(const char* segment_name, | |
153 | uint64_t flags, | |
154 | uint64_t align, | |
155 | const struct ld_plugin_section *section_list, | |
156 | unsigned int num_sections); | |
89fc3421 CC |
157 | }; |
158 | ||
159 | #endif // ENABLE_PLUGINS | |
160 | ||
161 | static Pluginobj* make_sized_plugin_object(Input_file* input_file, | |
0f7c0701 | 162 | off_t offset, off_t filesize); |
89fc3421 CC |
163 | |
164 | // Plugin methods. | |
165 | ||
166 | // Load one plugin library. | |
167 | ||
168 | void | |
169 | Plugin::load() | |
170 | { | |
171 | #ifdef ENABLE_PLUGINS | |
89fc3421 CC |
172 | // Load the plugin library. |
173 | // FIXME: Look for the library in standard locations. | |
4674ecfc | 174 | this->handle_ = dlopen(this->filename_.c_str(), RTLD_NOW); |
89fc3421 CC |
175 | if (this->handle_ == NULL) |
176 | { | |
4802450a RÁE |
177 | gold_error(_("%s: could not load plugin library: %s"), |
178 | this->filename_.c_str(), dlerror()); | |
89fc3421 CC |
179 | return; |
180 | } | |
181 | ||
182 | // Find the plugin's onload entry point. | |
b59befec ILT |
183 | void* ptr = dlsym(this->handle_, "onload"); |
184 | if (ptr == NULL) | |
89fc3421 | 185 | { |
4674ecfc CC |
186 | gold_error(_("%s: could not find onload entry point"), |
187 | this->filename_.c_str()); | |
89fc3421 CC |
188 | return; |
189 | } | |
b59befec ILT |
190 | ld_plugin_onload onload; |
191 | gold_assert(sizeof(onload) == sizeof(ptr)); | |
192 | memcpy(&onload, &ptr, sizeof(ptr)); | |
89fc3421 CC |
193 | |
194 | // Get the linker's version number. | |
195 | const char* ver = get_version_string(); | |
196 | int major = 0; | |
197 | int minor = 0; | |
198 | sscanf(ver, "%d.%d", &major, &minor); | |
199 | ||
200 | // Allocate and populate a transfer vector. | |
16164a6b | 201 | const int tv_fixed_size = 26; |
e9552f7e | 202 | |
4674ecfc | 203 | int tv_size = this->args_.size() + tv_fixed_size; |
ca09d69a | 204 | ld_plugin_tv* tv = new ld_plugin_tv[tv_size]; |
89fc3421 | 205 | |
abc8dcba CC |
206 | // Put LDPT_MESSAGE at the front of the list so the plugin can use it |
207 | // while processing subsequent entries. | |
89fc3421 | 208 | int i = 0; |
abc8dcba CC |
209 | tv[i].tv_tag = LDPT_MESSAGE; |
210 | tv[i].tv_u.tv_message = message; | |
211 | ||
212 | ++i; | |
89fc3421 CC |
213 | tv[i].tv_tag = LDPT_API_VERSION; |
214 | tv[i].tv_u.tv_val = LD_PLUGIN_API_VERSION; | |
215 | ||
216 | ++i; | |
217 | tv[i].tv_tag = LDPT_GOLD_VERSION; | |
218 | tv[i].tv_u.tv_val = major * 100 + minor; | |
219 | ||
220 | ++i; | |
221 | tv[i].tv_tag = LDPT_LINKER_OUTPUT; | |
222 | if (parameters->options().relocatable()) | |
223 | tv[i].tv_u.tv_val = LDPO_REL; | |
224 | else if (parameters->options().shared()) | |
225 | tv[i].tv_u.tv_val = LDPO_DYN; | |
370e30b6 RÁE |
226 | else if (parameters->options().pie()) |
227 | tv[i].tv_u.tv_val = LDPO_PIE; | |
89fc3421 CC |
228 | else |
229 | tv[i].tv_u.tv_val = LDPO_EXEC; | |
230 | ||
3537c84b RÁE |
231 | ++i; |
232 | tv[i].tv_tag = LDPT_OUTPUT_NAME; | |
233 | tv[i].tv_u.tv_string = parameters->options().output(); | |
234 | ||
4674ecfc | 235 | for (unsigned int j = 0; j < this->args_.size(); ++j) |
89fc3421 CC |
236 | { |
237 | ++i; | |
238 | tv[i].tv_tag = LDPT_OPTION; | |
4674ecfc | 239 | tv[i].tv_u.tv_string = this->args_[j].c_str(); |
89fc3421 CC |
240 | } |
241 | ||
242 | ++i; | |
243 | tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK; | |
244 | tv[i].tv_u.tv_register_claim_file = register_claim_file; | |
245 | ||
246 | ++i; | |
247 | tv[i].tv_tag = LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK; | |
248 | tv[i].tv_u.tv_register_all_symbols_read = register_all_symbols_read; | |
249 | ||
250 | ++i; | |
251 | tv[i].tv_tag = LDPT_REGISTER_CLEANUP_HOOK; | |
252 | tv[i].tv_u.tv_register_cleanup = register_cleanup; | |
253 | ||
254 | ++i; | |
255 | tv[i].tv_tag = LDPT_ADD_SYMBOLS; | |
256 | tv[i].tv_u.tv_add_symbols = add_symbols; | |
257 | ||
0f7c0701 CC |
258 | ++i; |
259 | tv[i].tv_tag = LDPT_GET_INPUT_FILE; | |
260 | tv[i].tv_u.tv_get_input_file = get_input_file; | |
261 | ||
9c793f14 RÁE |
262 | ++i; |
263 | tv[i].tv_tag = LDPT_GET_VIEW; | |
264 | tv[i].tv_u.tv_get_view = get_view; | |
265 | ||
0f7c0701 CC |
266 | ++i; |
267 | tv[i].tv_tag = LDPT_RELEASE_INPUT_FILE; | |
268 | tv[i].tv_u.tv_release_input_file = release_input_file; | |
269 | ||
89fc3421 CC |
270 | ++i; |
271 | tv[i].tv_tag = LDPT_GET_SYMBOLS; | |
272 | tv[i].tv_u.tv_get_symbols = get_symbols; | |
273 | ||
235061c2 CC |
274 | ++i; |
275 | tv[i].tv_tag = LDPT_GET_SYMBOLS_V2; | |
276 | tv[i].tv_u.tv_get_symbols = get_symbols_v2; | |
277 | ||
89fc3421 CC |
278 | ++i; |
279 | tv[i].tv_tag = LDPT_ADD_INPUT_FILE; | |
280 | tv[i].tv_u.tv_add_input_file = add_input_file; | |
281 | ||
e99daf92 ILT |
282 | ++i; |
283 | tv[i].tv_tag = LDPT_ADD_INPUT_LIBRARY; | |
284 | tv[i].tv_u.tv_add_input_library = add_input_library; | |
285 | ||
42218b9f RÁE |
286 | ++i; |
287 | tv[i].tv_tag = LDPT_SET_EXTRA_LIBRARY_PATH; | |
288 | tv[i].tv_u.tv_set_extra_library_path = set_extra_library_path; | |
289 | ||
e9552f7e ST |
290 | ++i; |
291 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_COUNT; | |
292 | tv[i].tv_u.tv_get_input_section_count = get_input_section_count; | |
293 | ||
294 | ++i; | |
295 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_TYPE; | |
296 | tv[i].tv_u.tv_get_input_section_type = get_input_section_type; | |
297 | ||
298 | ++i; | |
299 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_NAME; | |
300 | tv[i].tv_u.tv_get_input_section_name = get_input_section_name; | |
301 | ||
302 | ++i; | |
303 | tv[i].tv_tag = LDPT_GET_INPUT_SECTION_CONTENTS; | |
304 | tv[i].tv_u.tv_get_input_section_contents = get_input_section_contents; | |
305 | ||
306 | ++i; | |
307 | tv[i].tv_tag = LDPT_UPDATE_SECTION_ORDER; | |
308 | tv[i].tv_u.tv_update_section_order = update_section_order; | |
309 | ||
310 | ++i; | |
311 | tv[i].tv_tag = LDPT_ALLOW_SECTION_ORDERING; | |
312 | tv[i].tv_u.tv_allow_section_ordering = allow_section_ordering; | |
313 | ||
16164a6b ST |
314 | ++i; |
315 | tv[i].tv_tag = LDPT_ALLOW_UNIQUE_SEGMENT_FOR_SECTIONS; | |
316 | tv[i].tv_u.tv_allow_unique_segment_for_sections | |
317 | = allow_unique_segment_for_sections; | |
318 | ||
319 | ++i; | |
320 | tv[i].tv_tag = LDPT_UNIQUE_SEGMENT_FOR_SECTIONS; | |
321 | tv[i].tv_u.tv_unique_segment_for_sections = unique_segment_for_sections; | |
322 | ||
89fc3421 CC |
323 | ++i; |
324 | tv[i].tv_tag = LDPT_NULL; | |
325 | tv[i].tv_u.tv_val = 0; | |
326 | ||
327 | gold_assert(i == tv_size - 1); | |
328 | ||
329 | // Call the onload entry point. | |
330 | (*onload)(tv); | |
331 | ||
6c52134c | 332 | delete[] tv; |
89fc3421 CC |
333 | #endif // ENABLE_PLUGINS |
334 | } | |
335 | ||
336 | // Call the plugin claim-file handler. | |
337 | ||
338 | inline bool | |
ca09d69a | 339 | Plugin::claim_file(struct ld_plugin_input_file* plugin_input_file) |
89fc3421 CC |
340 | { |
341 | int claimed = 0; | |
342 | ||
343 | if (this->claim_file_handler_ != NULL) | |
344 | { | |
345 | (*this->claim_file_handler_)(plugin_input_file, &claimed); | |
346 | if (claimed) | |
347 | return true; | |
348 | } | |
349 | return false; | |
350 | } | |
351 | ||
352 | // Call the all-symbols-read handler. | |
353 | ||
354 | inline void | |
355 | Plugin::all_symbols_read() | |
356 | { | |
357 | if (this->all_symbols_read_handler_ != NULL) | |
358 | (*this->all_symbols_read_handler_)(); | |
359 | } | |
360 | ||
361 | // Call the cleanup handler. | |
362 | ||
363 | inline void | |
364 | Plugin::cleanup() | |
365 | { | |
40f36857 CC |
366 | if (this->cleanup_handler_ != NULL && !this->cleanup_done_) |
367 | { | |
368 | // Set this flag before calling to prevent a recursive plunge | |
369 | // in the event that a plugin's cleanup handler issues a | |
370 | // fatal error. | |
371 | this->cleanup_done_ = true; | |
372 | (*this->cleanup_handler_)(); | |
373 | } | |
89fc3421 CC |
374 | } |
375 | ||
0f3b89d8 ILT |
376 | // This task is used to rescan archives as needed. |
377 | ||
378 | class Plugin_rescan : public Task | |
379 | { | |
380 | public: | |
381 | Plugin_rescan(Task_token* this_blocker, Task_token* next_blocker) | |
382 | : this_blocker_(this_blocker), next_blocker_(next_blocker) | |
383 | { } | |
384 | ||
385 | ~Plugin_rescan() | |
386 | { | |
387 | delete this->this_blocker_; | |
388 | } | |
389 | ||
390 | Task_token* | |
391 | is_runnable() | |
392 | { | |
393 | if (this->this_blocker_->is_blocked()) | |
394 | return this->this_blocker_; | |
395 | return NULL; | |
396 | } | |
397 | ||
398 | void | |
399 | locks(Task_locker* tl) | |
400 | { tl->add(this, this->next_blocker_); } | |
401 | ||
402 | void | |
403 | run(Workqueue*) | |
404 | { parameters->options().plugins()->rescan(this); } | |
405 | ||
406 | std::string | |
407 | get_name() const | |
408 | { return "Plugin_rescan"; } | |
409 | ||
410 | private: | |
411 | Task_token* this_blocker_; | |
412 | Task_token* next_blocker_; | |
413 | }; | |
414 | ||
89fc3421 CC |
415 | // Plugin_manager methods. |
416 | ||
417 | Plugin_manager::~Plugin_manager() | |
418 | { | |
419 | for (Plugin_list::iterator p = this->plugins_.begin(); | |
420 | p != this->plugins_.end(); | |
421 | ++p) | |
422 | delete *p; | |
423 | this->plugins_.clear(); | |
424 | for (Object_list::iterator obj = this->objects_.begin(); | |
425 | obj != this->objects_.end(); | |
426 | ++obj) | |
427 | delete *obj; | |
428 | this->objects_.clear(); | |
429 | } | |
430 | ||
431 | // Load all plugin libraries. | |
432 | ||
433 | void | |
e9552f7e | 434 | Plugin_manager::load_plugins(Layout* layout) |
89fc3421 | 435 | { |
e9552f7e | 436 | this->layout_ = layout; |
89fc3421 CC |
437 | for (this->current_ = this->plugins_.begin(); |
438 | this->current_ != this->plugins_.end(); | |
439 | ++this->current_) | |
440 | (*this->current_)->load(); | |
441 | } | |
442 | ||
443 | // Call the plugin claim-file handlers in turn to see if any claim the file. | |
444 | ||
445 | Pluginobj* | |
446 | Plugin_manager::claim_file(Input_file* input_file, off_t offset, | |
e9552f7e | 447 | off_t filesize, Object* elf_object) |
89fc3421 CC |
448 | { |
449 | if (this->in_replacement_phase_) | |
450 | return NULL; | |
451 | ||
452 | unsigned int handle = this->objects_.size(); | |
453 | this->input_file_ = input_file; | |
454 | this->plugin_input_file_.name = input_file->filename().c_str(); | |
455 | this->plugin_input_file_.fd = input_file->file().descriptor(); | |
456 | this->plugin_input_file_.offset = offset; | |
457 | this->plugin_input_file_.filesize = filesize; | |
458 | this->plugin_input_file_.handle = reinterpret_cast<void*>(handle); | |
e9552f7e ST |
459 | if (elf_object != NULL) |
460 | this->objects_.push_back(elf_object); | |
461 | this->in_claim_file_handler_ = true; | |
89fc3421 CC |
462 | |
463 | for (this->current_ = this->plugins_.begin(); | |
464 | this->current_ != this->plugins_.end(); | |
465 | ++this->current_) | |
466 | { | |
467 | if ((*this->current_)->claim_file(&this->plugin_input_file_)) | |
468 | { | |
0f3b89d8 | 469 | this->any_claimed_ = true; |
e9552f7e | 470 | this->in_claim_file_handler_ = false; |
0f3b89d8 | 471 | |
e9552f7e ST |
472 | if (this->objects_.size() > handle |
473 | && this->objects_[handle]->pluginobj() != NULL) | |
474 | return this->objects_[handle]->pluginobj(); | |
abc8dcba CC |
475 | |
476 | // If the plugin claimed the file but did not call the | |
477 | // add_symbols callback, we need to create the Pluginobj now. | |
478 | Pluginobj* obj = this->make_plugin_object(handle); | |
479 | return obj; | |
89fc3421 CC |
480 | } |
481 | } | |
482 | ||
e9552f7e | 483 | this->in_claim_file_handler_ = false; |
89fc3421 CC |
484 | return NULL; |
485 | } | |
486 | ||
0f3b89d8 ILT |
487 | // Save an archive. This is used so that a plugin can add a file |
488 | // which refers to a symbol which was not previously referenced. In | |
489 | // that case we want to pretend that the symbol was referenced before, | |
490 | // and pull in the archive object. | |
491 | ||
492 | void | |
493 | Plugin_manager::save_archive(Archive* archive) | |
494 | { | |
495 | if (this->in_replacement_phase_ || !this->any_claimed_) | |
496 | delete archive; | |
497 | else | |
498 | this->rescannable_.push_back(Rescannable(archive)); | |
499 | } | |
500 | ||
501 | // Save an Input_group. This is like save_archive. | |
502 | ||
503 | void | |
504 | Plugin_manager::save_input_group(Input_group* input_group) | |
505 | { | |
506 | if (this->in_replacement_phase_ || !this->any_claimed_) | |
507 | delete input_group; | |
508 | else | |
509 | this->rescannable_.push_back(Rescannable(input_group)); | |
510 | } | |
511 | ||
89fc3421 CC |
512 | // Call the all-symbols-read handlers. |
513 | ||
514 | void | |
0f7c0701 | 515 | Plugin_manager::all_symbols_read(Workqueue* workqueue, Task* task, |
89fc3421 | 516 | Input_objects* input_objects, |
e9552f7e | 517 | Symbol_table* symtab, |
89fc3421 CC |
518 | Dirsearch* dirpath, Mapfile* mapfile, |
519 | Task_token** last_blocker) | |
520 | { | |
521 | this->in_replacement_phase_ = true; | |
522 | this->workqueue_ = workqueue; | |
0f7c0701 | 523 | this->task_ = task; |
89fc3421 CC |
524 | this->input_objects_ = input_objects; |
525 | this->symtab_ = symtab; | |
89fc3421 CC |
526 | this->dirpath_ = dirpath; |
527 | this->mapfile_ = mapfile; | |
528 | this->this_blocker_ = NULL; | |
529 | ||
530 | for (this->current_ = this->plugins_.begin(); | |
531 | this->current_ != this->plugins_.end(); | |
532 | ++this->current_) | |
533 | (*this->current_)->all_symbols_read(); | |
534 | ||
0f3b89d8 ILT |
535 | if (this->any_added_) |
536 | { | |
537 | Task_token* next_blocker = new Task_token(true); | |
538 | next_blocker->add_blocker(); | |
539 | workqueue->queue(new Plugin_rescan(this->this_blocker_, next_blocker)); | |
540 | this->this_blocker_ = next_blocker; | |
541 | } | |
542 | ||
89fc3421 CC |
543 | *last_blocker = this->this_blocker_; |
544 | } | |
545 | ||
0f3b89d8 ILT |
546 | // This is called when we see a new undefined symbol. If we are in |
547 | // the replacement phase, this means that we may need to rescan some | |
548 | // archives we have previously seen. | |
549 | ||
550 | void | |
551 | Plugin_manager::new_undefined_symbol(Symbol* sym) | |
552 | { | |
553 | if (this->in_replacement_phase_) | |
554 | this->undefined_symbols_.push_back(sym); | |
555 | } | |
556 | ||
557 | // Rescan archives as needed. This handles the case where a new | |
558 | // object file added by a plugin has an undefined reference to some | |
559 | // symbol defined in an archive. | |
560 | ||
561 | void | |
562 | Plugin_manager::rescan(Task* task) | |
563 | { | |
564 | size_t rescan_pos = 0; | |
565 | size_t rescan_size = this->rescannable_.size(); | |
566 | while (!this->undefined_symbols_.empty()) | |
567 | { | |
568 | if (rescan_pos >= rescan_size) | |
569 | { | |
570 | this->undefined_symbols_.clear(); | |
571 | return; | |
572 | } | |
573 | ||
574 | Undefined_symbol_list undefs; | |
575 | undefs.reserve(this->undefined_symbols_.size()); | |
576 | this->undefined_symbols_.swap(undefs); | |
577 | ||
578 | size_t min_rescan_pos = rescan_size; | |
579 | ||
580 | for (Undefined_symbol_list::const_iterator p = undefs.begin(); | |
581 | p != undefs.end(); | |
582 | ++p) | |
583 | { | |
584 | if (!(*p)->is_undefined()) | |
585 | continue; | |
586 | ||
587 | this->undefined_symbols_.push_back(*p); | |
588 | ||
589 | // Find the first rescan archive which defines this symbol, | |
590 | // starting at the current rescan position. The rescan position | |
591 | // exists so that given -la -lb -lc we don't look for undefined | |
592 | // symbols in -lb back in -la, but instead get the definition | |
593 | // from -lc. Don't bother to look past the current minimum | |
594 | // rescan position. | |
595 | for (size_t i = rescan_pos; i < min_rescan_pos; ++i) | |
596 | { | |
597 | if (this->rescannable_defines(i, *p)) | |
598 | { | |
599 | min_rescan_pos = i; | |
600 | break; | |
601 | } | |
602 | } | |
603 | } | |
604 | ||
605 | if (min_rescan_pos >= rescan_size) | |
606 | { | |
607 | // We didn't find any rescannable archives which define any | |
608 | // undefined symbols. | |
609 | return; | |
610 | } | |
611 | ||
612 | const Rescannable& r(this->rescannable_[min_rescan_pos]); | |
613 | if (r.is_archive) | |
614 | { | |
615 | Task_lock_obj<Archive> tl(task, r.u.archive); | |
616 | r.u.archive->add_symbols(this->symtab_, this->layout_, | |
617 | this->input_objects_, this->mapfile_); | |
618 | } | |
619 | else | |
620 | { | |
621 | size_t next_saw_undefined = this->symtab_->saw_undefined(); | |
622 | size_t saw_undefined; | |
623 | do | |
624 | { | |
625 | saw_undefined = next_saw_undefined; | |
626 | ||
627 | for (Input_group::const_iterator p = r.u.input_group->begin(); | |
628 | p != r.u.input_group->end(); | |
629 | ++p) | |
630 | { | |
631 | Task_lock_obj<Archive> tl(task, *p); | |
632 | ||
633 | (*p)->add_symbols(this->symtab_, this->layout_, | |
634 | this->input_objects_, this->mapfile_); | |
635 | } | |
636 | ||
637 | next_saw_undefined = this->symtab_->saw_undefined(); | |
638 | } | |
639 | while (saw_undefined != next_saw_undefined); | |
640 | } | |
641 | ||
642 | for (size_t i = rescan_pos; i < min_rescan_pos + 1; ++i) | |
643 | { | |
644 | if (this->rescannable_[i].is_archive) | |
645 | delete this->rescannable_[i].u.archive; | |
646 | else | |
647 | delete this->rescannable_[i].u.input_group; | |
648 | } | |
649 | ||
650 | rescan_pos = min_rescan_pos + 1; | |
651 | } | |
652 | } | |
653 | ||
654 | // Return whether the rescannable at index I defines SYM. | |
655 | ||
656 | bool | |
657 | Plugin_manager::rescannable_defines(size_t i, Symbol* sym) | |
658 | { | |
659 | const Rescannable& r(this->rescannable_[i]); | |
660 | if (r.is_archive) | |
661 | return r.u.archive->defines_symbol(sym); | |
662 | else | |
663 | { | |
664 | for (Input_group::const_iterator p = r.u.input_group->begin(); | |
665 | p != r.u.input_group->end(); | |
666 | ++p) | |
667 | { | |
668 | if ((*p)->defines_symbol(sym)) | |
669 | return true; | |
670 | } | |
671 | return false; | |
672 | } | |
673 | } | |
674 | ||
483620e8 | 675 | // Layout deferred objects. |
89fc3421 CC |
676 | |
677 | void | |
483620e8 | 678 | Plugin_manager::layout_deferred_objects() |
89fc3421 | 679 | { |
5995b570 CC |
680 | Deferred_layout_list::iterator obj; |
681 | ||
682 | for (obj = this->deferred_layout_objects_.begin(); | |
683 | obj != this->deferred_layout_objects_.end(); | |
684 | ++obj) | |
5f9bcf58 CC |
685 | { |
686 | // Lock the object so we can read from it. This is only called | |
687 | // single-threaded from queue_middle_tasks, so it is OK to lock. | |
688 | // Unfortunately we have no way to pass in a Task token. | |
689 | const Task* dummy_task = reinterpret_cast<const Task*>(-1); | |
690 | Task_lock_obj<Object> tl(dummy_task, *obj); | |
691 | (*obj)->layout_deferred_sections(this->layout_); | |
692 | } | |
483620e8 CC |
693 | } |
694 | ||
695 | // Call the cleanup handlers. | |
5995b570 | 696 | |
483620e8 CC |
697 | void |
698 | Plugin_manager::cleanup() | |
699 | { | |
89fc3421 CC |
700 | for (this->current_ = this->plugins_.begin(); |
701 | this->current_ != this->plugins_.end(); | |
702 | ++this->current_) | |
703 | (*this->current_)->cleanup(); | |
704 | } | |
705 | ||
706 | // Make a new Pluginobj object. This is called when the plugin calls | |
707 | // the add_symbols API. | |
708 | ||
709 | Pluginobj* | |
710 | Plugin_manager::make_plugin_object(unsigned int handle) | |
711 | { | |
712 | // Make sure we aren't asked to make an object for the same handle twice. | |
e9552f7e ST |
713 | if (this->objects_.size() != handle |
714 | && this->objects_[handle]->pluginobj() != NULL) | |
89fc3421 CC |
715 | return NULL; |
716 | ||
717 | Pluginobj* obj = make_sized_plugin_object(this->input_file_, | |
0f7c0701 CC |
718 | this->plugin_input_file_.offset, |
719 | this->plugin_input_file_.filesize); | |
e9552f7e ST |
720 | |
721 | ||
722 | // If the elf object for this file was pushed into the objects_ vector, delete | |
723 | // it to make room for the Pluginobj as this file is claimed. | |
724 | if (this->objects_.size() != handle) | |
725 | this->objects_.pop_back(); | |
726 | ||
89fc3421 CC |
727 | this->objects_.push_back(obj); |
728 | return obj; | |
729 | } | |
730 | ||
0f7c0701 CC |
731 | // Get the input file information with an open (possibly re-opened) |
732 | // file descriptor. | |
733 | ||
734 | ld_plugin_status | |
735 | Plugin_manager::get_input_file(unsigned int handle, | |
ca09d69a | 736 | struct ld_plugin_input_file* file) |
0f7c0701 | 737 | { |
e9552f7e | 738 | Pluginobj* obj = this->object(handle)->pluginobj(); |
0f7c0701 CC |
739 | if (obj == NULL) |
740 | return LDPS_BAD_HANDLE; | |
741 | ||
742 | obj->lock(this->task_); | |
743 | file->name = obj->filename().c_str(); | |
744 | file->fd = obj->descriptor(); | |
745 | file->offset = obj->offset(); | |
746 | file->filesize = obj->filesize(); | |
747 | file->handle = reinterpret_cast<void*>(handle); | |
748 | return LDPS_OK; | |
749 | } | |
750 | ||
751 | // Release the input file. | |
752 | ||
753 | ld_plugin_status | |
754 | Plugin_manager::release_input_file(unsigned int handle) | |
755 | { | |
e9552f7e ST |
756 | if (this->object(handle) == NULL) |
757 | return LDPS_BAD_HANDLE; | |
758 | ||
759 | Pluginobj* obj = this->object(handle)->pluginobj(); | |
760 | ||
0f7c0701 CC |
761 | if (obj == NULL) |
762 | return LDPS_BAD_HANDLE; | |
763 | ||
764 | obj->unlock(this->task_); | |
765 | return LDPS_OK; | |
766 | } | |
767 | ||
e9552f7e ST |
768 | // Get the elf object corresponding to the handle. Return NULL if we |
769 | // found a Pluginobj instead. | |
770 | ||
771 | Object* | |
772 | Plugin_manager::get_elf_object(const void* handle) | |
773 | { | |
774 | Object* obj = this->object( | |
775 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
776 | ||
777 | // The object should not be a Pluginobj. | |
778 | if (obj == NULL | |
779 | || obj->pluginobj() != NULL) | |
780 | return NULL; | |
781 | ||
782 | return obj; | |
783 | } | |
784 | ||
9c793f14 RÁE |
785 | ld_plugin_status |
786 | Plugin_manager::get_view(unsigned int handle, const void **viewp) | |
787 | { | |
788 | off_t offset; | |
789 | size_t filesize; | |
790 | Input_file *input_file; | |
e9552f7e | 791 | if (this->in_claim_file_handler_) |
9c793f14 RÁE |
792 | { |
793 | // We are being called from the claim_file hook. | |
794 | const struct ld_plugin_input_file &f = this->plugin_input_file_; | |
795 | offset = f.offset; | |
796 | filesize = f.filesize; | |
797 | input_file = this->input_file_; | |
798 | } | |
799 | else | |
800 | { | |
801 | // An already claimed file. | |
e9552f7e ST |
802 | if (this->object(handle) == NULL) |
803 | return LDPS_BAD_HANDLE; | |
804 | Pluginobj* obj = this->object(handle)->pluginobj(); | |
9c793f14 RÁE |
805 | if (obj == NULL) |
806 | return LDPS_BAD_HANDLE; | |
807 | offset = obj->offset(); | |
808 | filesize = obj->filesize(); | |
809 | input_file = obj->input_file(); | |
810 | } | |
811 | *viewp = (void*) input_file->file().get_view(offset, 0, filesize, false, | |
812 | false); | |
813 | return LDPS_OK; | |
814 | } | |
815 | ||
42218b9f RÁE |
816 | // Add a new library path. |
817 | ||
818 | ld_plugin_status | |
ca09d69a | 819 | Plugin_manager::set_extra_library_path(const char* path) |
42218b9f RÁE |
820 | { |
821 | this->extra_search_path_ = std::string(path); | |
822 | return LDPS_OK; | |
823 | } | |
824 | ||
89fc3421 CC |
825 | // Add a new input file. |
826 | ||
827 | ld_plugin_status | |
ca09d69a | 828 | Plugin_manager::add_input_file(const char* pathname, bool is_lib) |
89fc3421 | 829 | { |
ae3b5189 CD |
830 | Input_file_argument file(pathname, |
831 | (is_lib | |
832 | ? Input_file_argument::INPUT_FILE_TYPE_LIBRARY | |
833 | : Input_file_argument::INPUT_FILE_TYPE_FILE), | |
42218b9f RÁE |
834 | (is_lib |
835 | ? this->extra_search_path_.c_str() | |
836 | : ""), | |
837 | false, | |
838 | this->options_); | |
89fc3421 CC |
839 | Input_argument* input_argument = new Input_argument(file); |
840 | Task_token* next_blocker = new Task_token(true); | |
841 | next_blocker->add_blocker(); | |
8c21d9d3 | 842 | if (parameters->incremental()) |
40f36857 CC |
843 | gold_error(_("input files added by plug-ins in --incremental mode not " |
844 | "supported yet")); | |
f1ed28fb | 845 | this->workqueue_->queue_soon(new Read_symbols(this->input_objects_, |
89fc3421 CC |
846 | this->symtab_, |
847 | this->layout_, | |
848 | this->dirpath_, | |
15f8229b | 849 | 0, |
89fc3421 CC |
850 | this->mapfile_, |
851 | input_argument, | |
852 | NULL, | |
b0193076 | 853 | NULL, |
89fc3421 CC |
854 | this->this_blocker_, |
855 | next_blocker)); | |
856 | this->this_blocker_ = next_blocker; | |
0f3b89d8 | 857 | this->any_added_ = true; |
89fc3421 CC |
858 | return LDPS_OK; |
859 | } | |
860 | ||
861 | // Class Pluginobj. | |
862 | ||
2ea97941 ILT |
863 | Pluginobj::Pluginobj(const std::string& name, Input_file* input_file, |
864 | off_t offset, off_t filesize) | |
865 | : Object(name, input_file, false, offset), | |
866 | nsyms_(0), syms_(NULL), symbols_(), filesize_(filesize), comdat_map_() | |
89fc3421 CC |
867 | { |
868 | } | |
869 | ||
235061c2 | 870 | // Return TRUE if a defined symbol is referenced from outside the |
f7c5b166 CC |
871 | // universe of claimed objects. Only references from relocatable, |
872 | // non-IR (unclaimed) objects count as a reference. References from | |
873 | // dynamic objects count only as "visible". | |
d66a9eb3 CC |
874 | |
875 | static inline bool | |
235061c2 | 876 | is_referenced_from_outside(Symbol* lsym) |
d66a9eb3 CC |
877 | { |
878 | if (lsym->in_real_elf()) | |
879 | return true; | |
880 | if (parameters->options().relocatable()) | |
881 | return true; | |
84ced98a RÁE |
882 | if (parameters->options().is_undefined(lsym->name())) |
883 | return true; | |
235061c2 CC |
884 | return false; |
885 | } | |
886 | ||
887 | // Return TRUE if a defined symbol might be reachable from outside the | |
888 | // load module. | |
889 | ||
890 | static inline bool | |
891 | is_visible_from_outside(Symbol* lsym) | |
892 | { | |
f7c5b166 CC |
893 | if (lsym->in_dyn()) |
894 | return true; | |
d66a9eb3 CC |
895 | if (parameters->options().export_dynamic() || parameters->options().shared()) |
896 | return lsym->is_externally_visible(); | |
897 | return false; | |
898 | } | |
899 | ||
89fc3421 CC |
900 | // Get symbol resolution info. |
901 | ||
902 | ld_plugin_status | |
235061c2 CC |
903 | Pluginobj::get_symbol_resolution_info(int nsyms, |
904 | ld_plugin_symbol* syms, | |
905 | int version) const | |
906 | { | |
907 | // For version 1 of this interface, we cannot use | |
908 | // LDPR_PREVAILING_DEF_IRONLY_EXP, so we return LDPR_PREVAILING_DEF | |
909 | // instead. | |
910 | const ld_plugin_symbol_resolution ldpr_prevailing_def_ironly_exp | |
911 | = (version > 1 | |
912 | ? LDPR_PREVAILING_DEF_IRONLY_EXP | |
913 | : LDPR_PREVAILING_DEF); | |
914 | ||
abc8dcba | 915 | if (nsyms > this->nsyms_) |
89fc3421 | 916 | return LDPS_NO_SYMS; |
b0193076 RÁE |
917 | |
918 | if (static_cast<size_t>(nsyms) > this->symbols_.size()) | |
919 | { | |
920 | // We never decided to include this object. We mark all symbols as | |
921 | // preempted. | |
ca09d69a | 922 | gold_assert(this->symbols_.size() == 0); |
b0193076 RÁE |
923 | for (int i = 0; i < nsyms; i++) |
924 | syms[i].resolution = LDPR_PREEMPTED_REG; | |
925 | return LDPS_OK; | |
926 | } | |
927 | ||
89fc3421 CC |
928 | for (int i = 0; i < nsyms; i++) |
929 | { | |
930 | ld_plugin_symbol* isym = &syms[i]; | |
931 | Symbol* lsym = this->symbols_[i]; | |
932 | ld_plugin_symbol_resolution res = LDPR_UNKNOWN; | |
933 | ||
934 | if (lsym->is_undefined()) | |
935 | // The symbol remains undefined. | |
936 | res = LDPR_UNDEF; | |
937 | else if (isym->def == LDPK_UNDEF | |
938 | || isym->def == LDPK_WEAKUNDEF | |
939 | || isym->def == LDPK_COMMON) | |
940 | { | |
941 | // The original symbol was undefined or common. | |
942 | if (lsym->source() != Symbol::FROM_OBJECT) | |
943 | res = LDPR_RESOLVED_EXEC; | |
be234d88 | 944 | else if (lsym->object()->pluginobj() == this) |
235061c2 CC |
945 | { |
946 | if (is_referenced_from_outside(lsym)) | |
947 | res = LDPR_PREVAILING_DEF; | |
948 | else if (is_visible_from_outside(lsym)) | |
949 | res = ldpr_prevailing_def_ironly_exp; | |
950 | else | |
951 | res = LDPR_PREVAILING_DEF_IRONLY; | |
952 | } | |
89fc3421 CC |
953 | else if (lsym->object()->pluginobj() != NULL) |
954 | res = LDPR_RESOLVED_IR; | |
955 | else if (lsym->object()->is_dynamic()) | |
956 | res = LDPR_RESOLVED_DYN; | |
957 | else | |
958 | res = LDPR_RESOLVED_EXEC; | |
959 | } | |
960 | else | |
961 | { | |
962 | // The original symbol was a definition. | |
963 | if (lsym->source() != Symbol::FROM_OBJECT) | |
964 | res = LDPR_PREEMPTED_REG; | |
965 | else if (lsym->object() == static_cast<const Object*>(this)) | |
235061c2 CC |
966 | { |
967 | if (is_referenced_from_outside(lsym)) | |
968 | res = LDPR_PREVAILING_DEF; | |
969 | else if (is_visible_from_outside(lsym)) | |
970 | res = ldpr_prevailing_def_ironly_exp; | |
971 | else | |
972 | res = LDPR_PREVAILING_DEF_IRONLY; | |
973 | } | |
89fc3421 CC |
974 | else |
975 | res = (lsym->object()->pluginobj() != NULL | |
976 | ? LDPR_PREEMPTED_IR | |
977 | : LDPR_PREEMPTED_REG); | |
978 | } | |
979 | isym->resolution = res; | |
980 | } | |
981 | return LDPS_OK; | |
982 | } | |
983 | ||
984 | // Return TRUE if the comdat group with key COMDAT_KEY from this object | |
985 | // should be kept. | |
986 | ||
987 | bool | |
2ea97941 | 988 | Pluginobj::include_comdat_group(std::string comdat_key, Layout* layout) |
89fc3421 CC |
989 | { |
990 | std::pair<Comdat_map::iterator, bool> ins = | |
991 | this->comdat_map_.insert(std::make_pair(comdat_key, false)); | |
992 | ||
993 | // If this is the first time we've seen this comdat key, ask the | |
994 | // layout object whether it should be included. | |
995 | if (ins.second) | |
2ea97941 ILT |
996 | ins.first->second = layout->find_or_add_kept_section(comdat_key, |
997 | NULL, 0, true, | |
998 | true, NULL); | |
89fc3421 CC |
999 | |
1000 | return ins.first->second; | |
1001 | } | |
1002 | ||
1003 | // Class Sized_pluginobj. | |
1004 | ||
1005 | template<int size, bool big_endian> | |
1006 | Sized_pluginobj<size, big_endian>::Sized_pluginobj( | |
2ea97941 ILT |
1007 | const std::string& name, |
1008 | Input_file* input_file, | |
1009 | off_t offset, | |
1010 | off_t filesize) | |
1011 | : Pluginobj(name, input_file, offset, filesize) | |
89fc3421 CC |
1012 | { |
1013 | } | |
1014 | ||
1015 | // Read the symbols. Not used for plugin objects. | |
1016 | ||
1017 | template<int size, bool big_endian> | |
1018 | void | |
1019 | Sized_pluginobj<size, big_endian>::do_read_symbols(Read_symbols_data*) | |
1020 | { | |
1021 | gold_unreachable(); | |
1022 | } | |
1023 | ||
1024 | // Lay out the input sections. Not used for plugin objects. | |
1025 | ||
1026 | template<int size, bool big_endian> | |
1027 | void | |
1028 | Sized_pluginobj<size, big_endian>::do_layout(Symbol_table*, Layout*, | |
1029 | Read_symbols_data*) | |
1030 | { | |
1031 | gold_unreachable(); | |
1032 | } | |
1033 | ||
1034 | // Add the symbols to the symbol table. | |
1035 | ||
89fc3421 CC |
1036 | template<int size, bool big_endian> |
1037 | void | |
1038 | Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table* symtab, | |
f488e4b0 | 1039 | Read_symbols_data*, |
2ea97941 | 1040 | Layout* layout) |
89fc3421 CC |
1041 | { |
1042 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
1043 | unsigned char symbuf[sym_size]; | |
1044 | elfcpp::Sym<size, big_endian> sym(symbuf); | |
1045 | elfcpp::Sym_write<size, big_endian> osym(symbuf); | |
1046 | ||
1047 | typedef typename elfcpp::Elf_types<size>::Elf_WXword Elf_size_type; | |
1048 | ||
1049 | this->symbols_.resize(this->nsyms_); | |
1050 | ||
1051 | for (int i = 0; i < this->nsyms_; ++i) | |
1052 | { | |
ca09d69a | 1053 | const struct ld_plugin_symbol* isym = &this->syms_[i]; |
2ea97941 | 1054 | const char* name = isym->name; |
89fc3421 CC |
1055 | const char* ver = isym->version; |
1056 | elfcpp::Elf_Half shndx; | |
1057 | elfcpp::STB bind; | |
1058 | elfcpp::STV vis; | |
1059 | ||
2ea97941 ILT |
1060 | if (name != NULL && name[0] == '\0') |
1061 | name = NULL; | |
89fc3421 CC |
1062 | if (ver != NULL && ver[0] == '\0') |
1063 | ver = NULL; | |
1064 | ||
1065 | switch (isym->def) | |
1066 | { | |
1067 | case LDPK_WEAKDEF: | |
1068 | case LDPK_WEAKUNDEF: | |
1069 | bind = elfcpp::STB_WEAK; | |
1070 | break; | |
1071 | case LDPK_DEF: | |
1072 | case LDPK_UNDEF: | |
1073 | case LDPK_COMMON: | |
1074 | default: | |
1075 | bind = elfcpp::STB_GLOBAL; | |
1076 | break; | |
1077 | } | |
1078 | ||
1079 | switch (isym->def) | |
1080 | { | |
1081 | case LDPK_DEF: | |
1082 | case LDPK_WEAKDEF: | |
1083 | shndx = elfcpp::SHN_ABS; | |
1084 | break; | |
1085 | case LDPK_COMMON: | |
1086 | shndx = elfcpp::SHN_COMMON; | |
1087 | break; | |
1088 | case LDPK_UNDEF: | |
1089 | case LDPK_WEAKUNDEF: | |
1090 | default: | |
1091 | shndx = elfcpp::SHN_UNDEF; | |
1092 | break; | |
1093 | } | |
1094 | ||
1095 | switch (isym->visibility) | |
1096 | { | |
1097 | case LDPV_PROTECTED: | |
105b6afd | 1098 | vis = elfcpp::STV_PROTECTED; |
89fc3421 CC |
1099 | break; |
1100 | case LDPV_INTERNAL: | |
105b6afd | 1101 | vis = elfcpp::STV_INTERNAL; |
89fc3421 CC |
1102 | break; |
1103 | case LDPV_HIDDEN: | |
105b6afd | 1104 | vis = elfcpp::STV_HIDDEN; |
89fc3421 CC |
1105 | break; |
1106 | case LDPV_DEFAULT: | |
1107 | default: | |
1108 | vis = elfcpp::STV_DEFAULT; | |
1109 | break; | |
1110 | } | |
1111 | ||
1112 | if (isym->comdat_key != NULL | |
1113 | && isym->comdat_key[0] != '\0' | |
2ea97941 | 1114 | && !this->include_comdat_group(isym->comdat_key, layout)) |
89fc3421 CC |
1115 | shndx = elfcpp::SHN_UNDEF; |
1116 | ||
1117 | osym.put_st_name(0); | |
1118 | osym.put_st_value(0); | |
1119 | osym.put_st_size(static_cast<Elf_size_type>(isym->size)); | |
1120 | osym.put_st_info(bind, elfcpp::STT_NOTYPE); | |
1121 | osym.put_st_other(vis, 0); | |
1122 | osym.put_st_shndx(shndx); | |
1123 | ||
1124 | this->symbols_[i] = | |
2ea97941 | 1125 | symtab->add_from_pluginobj<size, big_endian>(this, name, ver, &sym); |
89fc3421 CC |
1126 | } |
1127 | } | |
1128 | ||
b0193076 RÁE |
1129 | template<int size, bool big_endian> |
1130 | Archive::Should_include | |
1131 | Sized_pluginobj<size, big_endian>::do_should_include_member( | |
88a4108b ILT |
1132 | Symbol_table* symtab, |
1133 | Layout* layout, | |
1134 | Read_symbols_data*, | |
1135 | std::string* why) | |
b0193076 RÁE |
1136 | { |
1137 | char* tmpbuf = NULL; | |
1138 | size_t tmpbuflen = 0; | |
1139 | ||
88a4108b ILT |
1140 | for (int i = 0; i < this->nsyms_; ++i) |
1141 | { | |
1142 | const struct ld_plugin_symbol& sym = this->syms_[i]; | |
1143 | const char* name = sym.name; | |
1144 | Symbol* symbol; | |
1145 | Archive::Should_include t = Archive::should_include_member(symtab, | |
1146 | layout, | |
1147 | name, | |
1148 | &symbol, why, | |
1149 | &tmpbuf, | |
1150 | &tmpbuflen); | |
b0193076 RÁE |
1151 | if (t == Archive::SHOULD_INCLUDE_YES) |
1152 | { | |
1153 | if (tmpbuf != NULL) | |
1154 | free(tmpbuf); | |
1155 | return t; | |
1156 | } | |
88a4108b | 1157 | } |
b0193076 RÁE |
1158 | if (tmpbuf != NULL) |
1159 | free(tmpbuf); | |
1160 | return Archive::SHOULD_INCLUDE_UNKNOWN; | |
1161 | } | |
1162 | ||
e0c52780 CC |
1163 | // Iterate over global symbols, calling a visitor class V for each. |
1164 | ||
1165 | template<int size, bool big_endian> | |
1166 | void | |
1167 | Sized_pluginobj<size, big_endian>::do_for_all_global_symbols( | |
1168 | Read_symbols_data*, | |
1169 | Library_base::Symbol_visitor_base* v) | |
1170 | { | |
1171 | for (int i = 0; i < this->nsyms_; ++i) | |
1172 | { | |
1173 | const struct ld_plugin_symbol& sym = this->syms_[i]; | |
1174 | if (sym.def != LDPK_UNDEF) | |
1175 | v->visit(sym.name); | |
1176 | } | |
1177 | } | |
1178 | ||
cdc29364 CC |
1179 | // Iterate over local symbols, calling a visitor class V for each GOT offset |
1180 | // associated with a local symbol. | |
1181 | template<int size, bool big_endian> | |
1182 | void | |
1183 | Sized_pluginobj<size, big_endian>::do_for_all_local_got_entries( | |
1184 | Got_offset_list::Visitor*) const | |
1185 | { | |
1186 | gold_unreachable(); | |
1187 | } | |
1188 | ||
89fc3421 CC |
1189 | // Get the size of a section. Not used for plugin objects. |
1190 | ||
1191 | template<int size, bool big_endian> | |
1192 | uint64_t | |
1193 | Sized_pluginobj<size, big_endian>::do_section_size(unsigned int) | |
1194 | { | |
1195 | gold_unreachable(); | |
1196 | return 0; | |
1197 | } | |
1198 | ||
1199 | // Get the name of a section. Not used for plugin objects. | |
1200 | ||
1201 | template<int size, bool big_endian> | |
1202 | std::string | |
1203 | Sized_pluginobj<size, big_endian>::do_section_name(unsigned int) | |
1204 | { | |
1205 | gold_unreachable(); | |
1206 | return std::string(); | |
1207 | } | |
1208 | ||
1209 | // Return a view of the contents of a section. Not used for plugin objects. | |
1210 | ||
1211 | template<int size, bool big_endian> | |
c1027032 CC |
1212 | const unsigned char* |
1213 | Sized_pluginobj<size, big_endian>::do_section_contents( | |
1214 | unsigned int, | |
1215 | section_size_type*, | |
1216 | bool) | |
89fc3421 | 1217 | { |
89fc3421 | 1218 | gold_unreachable(); |
c1027032 | 1219 | return NULL; |
89fc3421 CC |
1220 | } |
1221 | ||
1222 | // Return section flags. Not used for plugin objects. | |
1223 | ||
1224 | template<int size, bool big_endian> | |
1225 | uint64_t | |
1226 | Sized_pluginobj<size, big_endian>::do_section_flags(unsigned int) | |
1227 | { | |
1228 | gold_unreachable(); | |
1229 | return 0; | |
1230 | } | |
1231 | ||
ef15dade ST |
1232 | // Return section entsize. Not used for plugin objects. |
1233 | ||
1234 | template<int size, bool big_endian> | |
1235 | uint64_t | |
1236 | Sized_pluginobj<size, big_endian>::do_section_entsize(unsigned int) | |
1237 | { | |
1238 | gold_unreachable(); | |
1239 | return 0; | |
1240 | } | |
1241 | ||
89fc3421 CC |
1242 | // Return section address. Not used for plugin objects. |
1243 | ||
1244 | template<int size, bool big_endian> | |
1245 | uint64_t | |
1246 | Sized_pluginobj<size, big_endian>::do_section_address(unsigned int) | |
1247 | { | |
1248 | gold_unreachable(); | |
1249 | return 0; | |
1250 | } | |
1251 | ||
1252 | // Return section type. Not used for plugin objects. | |
1253 | ||
1254 | template<int size, bool big_endian> | |
1255 | unsigned int | |
1256 | Sized_pluginobj<size, big_endian>::do_section_type(unsigned int) | |
1257 | { | |
1258 | gold_unreachable(); | |
1259 | return 0; | |
1260 | } | |
1261 | ||
1262 | // Return the section link field. Not used for plugin objects. | |
1263 | ||
1264 | template<int size, bool big_endian> | |
1265 | unsigned int | |
1266 | Sized_pluginobj<size, big_endian>::do_section_link(unsigned int) | |
1267 | { | |
1268 | gold_unreachable(); | |
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | // Return the section link field. Not used for plugin objects. | |
1273 | ||
1274 | template<int size, bool big_endian> | |
1275 | unsigned int | |
1276 | Sized_pluginobj<size, big_endian>::do_section_info(unsigned int) | |
1277 | { | |
1278 | gold_unreachable(); | |
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | // Return the section alignment. Not used for plugin objects. | |
1283 | ||
1284 | template<int size, bool big_endian> | |
1285 | uint64_t | |
1286 | Sized_pluginobj<size, big_endian>::do_section_addralign(unsigned int) | |
1287 | { | |
1288 | gold_unreachable(); | |
1289 | return 0; | |
1290 | } | |
1291 | ||
1292 | // Return the Xindex structure to use. Not used for plugin objects. | |
1293 | ||
1294 | template<int size, bool big_endian> | |
1295 | Xindex* | |
1296 | Sized_pluginobj<size, big_endian>::do_initialize_xindex() | |
1297 | { | |
1298 | gold_unreachable(); | |
1299 | return NULL; | |
1300 | } | |
1301 | ||
53bbcc1b CC |
1302 | // Get symbol counts. Don't count plugin objects; the replacement |
1303 | // files will provide the counts. | |
89fc3421 CC |
1304 | |
1305 | template<int size, bool big_endian> | |
1306 | void | |
53bbcc1b CC |
1307 | Sized_pluginobj<size, big_endian>::do_get_global_symbol_counts( |
1308 | const Symbol_table*, | |
1309 | size_t* defined, | |
1310 | size_t* used) const | |
89fc3421 | 1311 | { |
53bbcc1b CC |
1312 | *defined = 0; |
1313 | *used = 0; | |
89fc3421 CC |
1314 | } |
1315 | ||
dde3f402 ILT |
1316 | // Get symbols. Not used for plugin objects. |
1317 | ||
1318 | template<int size, bool big_endian> | |
1319 | const Object::Symbols* | |
1320 | Sized_pluginobj<size, big_endian>::do_get_global_symbols() const | |
1321 | { | |
1322 | gold_unreachable(); | |
1323 | } | |
1324 | ||
5995b570 | 1325 | // Class Plugin_finish. This task runs after all replacement files have |
78384e8f CC |
1326 | // been added. For now, it's a placeholder for a possible plugin API |
1327 | // to allow the plugin to release most of its resources. The cleanup | |
1328 | // handlers must be called later, because they can remove the temporary | |
1329 | // object files that are needed until the end of the link. | |
89fc3421 | 1330 | |
5995b570 | 1331 | class Plugin_finish : public Task |
89fc3421 CC |
1332 | { |
1333 | public: | |
5995b570 | 1334 | Plugin_finish(Task_token* this_blocker, Task_token* next_blocker) |
89fc3421 CC |
1335 | : this_blocker_(this_blocker), next_blocker_(next_blocker) |
1336 | { } | |
1337 | ||
5995b570 | 1338 | ~Plugin_finish() |
89fc3421 CC |
1339 | { |
1340 | if (this->this_blocker_ != NULL) | |
1341 | delete this->this_blocker_; | |
1342 | } | |
1343 | ||
1344 | Task_token* | |
1345 | is_runnable() | |
1346 | { | |
1347 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
1348 | return this->this_blocker_; | |
1349 | return NULL; | |
1350 | } | |
1351 | ||
1352 | void | |
1353 | locks(Task_locker* tl) | |
1354 | { tl->add(this, this->next_blocker_); } | |
1355 | ||
1356 | void | |
1357 | run(Workqueue*) | |
483620e8 | 1358 | { |
78384e8f | 1359 | // We could call early cleanup handlers here. |
483620e8 | 1360 | } |
89fc3421 CC |
1361 | |
1362 | std::string | |
1363 | get_name() const | |
5995b570 | 1364 | { return "Plugin_finish"; } |
89fc3421 CC |
1365 | |
1366 | private: | |
1367 | Task_token* this_blocker_; | |
1368 | Task_token* next_blocker_; | |
1369 | }; | |
1370 | ||
1371 | // Class Plugin_hook. | |
1372 | ||
1373 | Plugin_hook::~Plugin_hook() | |
1374 | { | |
1375 | } | |
1376 | ||
1377 | // Return whether a Plugin_hook task is runnable. | |
1378 | ||
1379 | Task_token* | |
1380 | Plugin_hook::is_runnable() | |
1381 | { | |
1382 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) | |
1383 | return this->this_blocker_; | |
1384 | return NULL; | |
1385 | } | |
1386 | ||
1387 | // Return a Task_locker for a Plugin_hook task. We don't need any | |
1388 | // locks here. | |
1389 | ||
1390 | void | |
1391 | Plugin_hook::locks(Task_locker*) | |
1392 | { | |
1393 | } | |
1394 | ||
89fc3421 CC |
1395 | // Run the "all symbols read" plugin hook. |
1396 | ||
1397 | void | |
5995b570 | 1398 | Plugin_hook::run(Workqueue* workqueue) |
89fc3421 CC |
1399 | { |
1400 | gold_assert(this->options_.has_plugins()); | |
a10ae760 | 1401 | Symbol* start_sym = this->symtab_->lookup(parameters->entry()); |
91ff43fe RÁE |
1402 | if (start_sym != NULL) |
1403 | start_sym->set_in_real_elf(); | |
1404 | ||
89fc3421 | 1405 | this->options_.plugins()->all_symbols_read(workqueue, |
0f7c0701 | 1406 | this, |
89fc3421 CC |
1407 | this->input_objects_, |
1408 | this->symtab_, | |
89fc3421 CC |
1409 | this->dirpath_, |
1410 | this->mapfile_, | |
1411 | &this->this_blocker_); | |
5995b570 CC |
1412 | workqueue->queue_soon(new Plugin_finish(this->this_blocker_, |
1413 | this->next_blocker_)); | |
89fc3421 CC |
1414 | } |
1415 | ||
1416 | // The C interface routines called by the plugins. | |
1417 | ||
1418 | #ifdef ENABLE_PLUGINS | |
1419 | ||
1420 | // Register a claim-file handler. | |
1421 | ||
1422 | static enum ld_plugin_status | |
1423 | register_claim_file(ld_plugin_claim_file_handler handler) | |
1424 | { | |
1425 | gold_assert(parameters->options().has_plugins()); | |
1426 | parameters->options().plugins()->set_claim_file_handler(handler); | |
1427 | return LDPS_OK; | |
1428 | } | |
1429 | ||
1430 | // Register an all-symbols-read handler. | |
1431 | ||
1432 | static enum ld_plugin_status | |
1433 | register_all_symbols_read(ld_plugin_all_symbols_read_handler handler) | |
1434 | { | |
1435 | gold_assert(parameters->options().has_plugins()); | |
1436 | parameters->options().plugins()->set_all_symbols_read_handler(handler); | |
1437 | return LDPS_OK; | |
1438 | } | |
1439 | ||
1440 | // Register a cleanup handler. | |
1441 | ||
1442 | static enum ld_plugin_status | |
1443 | register_cleanup(ld_plugin_cleanup_handler handler) | |
1444 | { | |
1445 | gold_assert(parameters->options().has_plugins()); | |
1446 | parameters->options().plugins()->set_cleanup_handler(handler); | |
1447 | return LDPS_OK; | |
1448 | } | |
1449 | ||
1450 | // Add symbols from a plugin-claimed input file. | |
1451 | ||
1452 | static enum ld_plugin_status | |
ca09d69a | 1453 | add_symbols(void* handle, int nsyms, const ld_plugin_symbol* syms) |
89fc3421 CC |
1454 | { |
1455 | gold_assert(parameters->options().has_plugins()); | |
1456 | Pluginobj* obj = parameters->options().plugins()->make_plugin_object( | |
1457 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
1458 | if (obj == NULL) | |
1459 | return LDPS_ERR; | |
1460 | obj->store_incoming_symbols(nsyms, syms); | |
1461 | return LDPS_OK; | |
1462 | } | |
1463 | ||
0f7c0701 CC |
1464 | // Get the input file information with an open (possibly re-opened) |
1465 | // file descriptor. | |
1466 | ||
1467 | static enum ld_plugin_status | |
ca09d69a | 1468 | get_input_file(const void* handle, struct ld_plugin_input_file* file) |
0f7c0701 CC |
1469 | { |
1470 | gold_assert(parameters->options().has_plugins()); | |
1471 | unsigned int obj_index = | |
1472 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
1473 | return parameters->options().plugins()->get_input_file(obj_index, file); | |
1474 | } | |
1475 | ||
1476 | // Release the input file. | |
1477 | ||
1478 | static enum ld_plugin_status | |
ca09d69a | 1479 | release_input_file(const void* handle) |
0f7c0701 CC |
1480 | { |
1481 | gold_assert(parameters->options().has_plugins()); | |
1482 | unsigned int obj_index = | |
1483 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
1484 | return parameters->options().plugins()->release_input_file(obj_index); | |
1485 | } | |
1486 | ||
9c793f14 RÁE |
1487 | static enum ld_plugin_status |
1488 | get_view(const void *handle, const void **viewp) | |
1489 | { | |
1490 | gold_assert(parameters->options().has_plugins()); | |
1491 | unsigned int obj_index = | |
1492 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); | |
1493 | return parameters->options().plugins()->get_view(obj_index, viewp); | |
1494 | } | |
1495 | ||
89fc3421 CC |
1496 | // Get the symbol resolution info for a plugin-claimed input file. |
1497 | ||
1498 | static enum ld_plugin_status | |
ca09d69a | 1499 | get_symbols(const void* handle, int nsyms, ld_plugin_symbol* syms) |
89fc3421 CC |
1500 | { |
1501 | gold_assert(parameters->options().has_plugins()); | |
e9552f7e ST |
1502 | Object* obj = parameters->options().plugins()->object( |
1503 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
89fc3421 CC |
1504 | if (obj == NULL) |
1505 | return LDPS_ERR; | |
e9552f7e ST |
1506 | Pluginobj* plugin_obj = obj->pluginobj(); |
1507 | if (plugin_obj == NULL) | |
1508 | return LDPS_ERR; | |
235061c2 CC |
1509 | return plugin_obj->get_symbol_resolution_info(nsyms, syms, 1); |
1510 | } | |
1511 | ||
1512 | // Version 2 of the above. The only difference is that this version | |
1513 | // is allowed to return the resolution code LDPR_PREVAILING_DEF_IRONLY_EXP. | |
1514 | ||
1515 | static enum ld_plugin_status | |
1516 | get_symbols_v2(const void* handle, int nsyms, ld_plugin_symbol* syms) | |
1517 | { | |
1518 | gold_assert(parameters->options().has_plugins()); | |
1519 | Object* obj = parameters->options().plugins()->object( | |
1520 | static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); | |
1521 | if (obj == NULL) | |
1522 | return LDPS_ERR; | |
1523 | Pluginobj* plugin_obj = obj->pluginobj(); | |
1524 | if (plugin_obj == NULL) | |
1525 | return LDPS_ERR; | |
1526 | return plugin_obj->get_symbol_resolution_info(nsyms, syms, 2); | |
89fc3421 CC |
1527 | } |
1528 | ||
1529 | // Add a new (real) input file generated by a plugin. | |
1530 | ||
1531 | static enum ld_plugin_status | |
ca09d69a | 1532 | add_input_file(const char* pathname) |
89fc3421 CC |
1533 | { |
1534 | gold_assert(parameters->options().has_plugins()); | |
e99daf92 ILT |
1535 | return parameters->options().plugins()->add_input_file(pathname, false); |
1536 | } | |
1537 | ||
1538 | // Add a new (real) library required by a plugin. | |
1539 | ||
1540 | static enum ld_plugin_status | |
ca09d69a | 1541 | add_input_library(const char* pathname) |
e99daf92 ILT |
1542 | { |
1543 | gold_assert(parameters->options().has_plugins()); | |
1544 | return parameters->options().plugins()->add_input_file(pathname, true); | |
89fc3421 CC |
1545 | } |
1546 | ||
42218b9f RÁE |
1547 | // Set the extra library path to be used by libraries added via |
1548 | // add_input_library | |
1549 | ||
1550 | static enum ld_plugin_status | |
ca09d69a | 1551 | set_extra_library_path(const char* path) |
42218b9f RÁE |
1552 | { |
1553 | gold_assert(parameters->options().has_plugins()); | |
1554 | return parameters->options().plugins()->set_extra_library_path(path); | |
1555 | } | |
1556 | ||
89fc3421 CC |
1557 | // Issue a diagnostic message from a plugin. |
1558 | ||
1559 | static enum ld_plugin_status | |
ca09d69a | 1560 | message(int level, const char* format, ...) |
89fc3421 CC |
1561 | { |
1562 | va_list args; | |
1563 | va_start(args, format); | |
1564 | ||
1565 | switch (level) | |
1566 | { | |
1567 | case LDPL_INFO: | |
1568 | parameters->errors()->info(format, args); | |
1569 | break; | |
1570 | case LDPL_WARNING: | |
1571 | parameters->errors()->warning(format, args); | |
1572 | break; | |
1573 | case LDPL_ERROR: | |
1574 | default: | |
1575 | parameters->errors()->error(format, args); | |
1576 | break; | |
1577 | case LDPL_FATAL: | |
1578 | parameters->errors()->fatal(format, args); | |
1579 | break; | |
1580 | } | |
1581 | ||
1582 | va_end(args); | |
1583 | return LDPS_OK; | |
1584 | } | |
1585 | ||
e9552f7e ST |
1586 | // Get the section count of the object corresponding to the handle. This |
1587 | // plugin interface can only be called in the claim_file handler of the plugin. | |
1588 | ||
1589 | static enum ld_plugin_status | |
1590 | get_input_section_count(const void* handle, unsigned int* count) | |
1591 | { | |
1592 | gold_assert(parameters->options().has_plugins()); | |
1593 | ||
1594 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1595 | return LDPS_ERR; | |
1596 | ||
1597 | Object* obj = parameters->options().plugins()->get_elf_object(handle); | |
1598 | ||
1599 | if (obj == NULL) | |
1600 | return LDPS_ERR; | |
1601 | ||
1602 | *count = obj->shnum(); | |
1603 | return LDPS_OK; | |
1604 | } | |
1605 | ||
1606 | // Get the type of the specified section in the object corresponding | |
1607 | // to the handle. This plugin interface can only be called in the | |
1608 | // claim_file handler of the plugin. | |
1609 | ||
1610 | static enum ld_plugin_status | |
1611 | get_input_section_type(const struct ld_plugin_section section, | |
1612 | unsigned int* type) | |
1613 | { | |
1614 | gold_assert(parameters->options().has_plugins()); | |
1615 | ||
1616 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1617 | return LDPS_ERR; | |
1618 | ||
1619 | Object* obj | |
1620 | = parameters->options().plugins()->get_elf_object(section.handle); | |
1621 | ||
1622 | if (obj == NULL) | |
1623 | return LDPS_BAD_HANDLE; | |
1624 | ||
1625 | *type = obj->section_type(section.shndx); | |
1626 | return LDPS_OK; | |
1627 | } | |
1628 | ||
1629 | // Get the name of the specified section in the object corresponding | |
1630 | // to the handle. This plugin interface can only be called in the | |
1631 | // claim_file handler of the plugin. | |
1632 | ||
1633 | static enum ld_plugin_status | |
1634 | get_input_section_name(const struct ld_plugin_section section, | |
1635 | char** section_name_ptr) | |
1636 | { | |
1637 | gold_assert(parameters->options().has_plugins()); | |
1638 | ||
1639 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1640 | return LDPS_ERR; | |
1641 | ||
1642 | Object* obj | |
1643 | = parameters->options().plugins()->get_elf_object(section.handle); | |
1644 | ||
1645 | if (obj == NULL) | |
1646 | return LDPS_BAD_HANDLE; | |
1647 | ||
1648 | // Check if the object is locked before getting the section name. | |
1649 | gold_assert(obj->is_locked()); | |
1650 | ||
1651 | const std::string section_name = obj->section_name(section.shndx); | |
1652 | *section_name_ptr = static_cast<char*>(malloc(section_name.length() + 1)); | |
1653 | memcpy(*section_name_ptr, section_name.c_str(), section_name.length() + 1); | |
1654 | return LDPS_OK; | |
1655 | } | |
1656 | ||
1657 | // Get the contents of the specified section in the object corresponding | |
1658 | // to the handle. This plugin interface can only be called in the | |
1659 | // claim_file handler of the plugin. | |
1660 | ||
1661 | static enum ld_plugin_status | |
1662 | get_input_section_contents(const struct ld_plugin_section section, | |
1663 | const unsigned char** section_contents_ptr, | |
1664 | size_t* len) | |
1665 | { | |
1666 | gold_assert(parameters->options().has_plugins()); | |
1667 | ||
1668 | if (!parameters->options().plugins()->in_claim_file_handler()) | |
1669 | return LDPS_ERR; | |
1670 | ||
1671 | Object* obj | |
1672 | = parameters->options().plugins()->get_elf_object(section.handle); | |
1673 | ||
1674 | if (obj == NULL) | |
1675 | return LDPS_BAD_HANDLE; | |
1676 | ||
1677 | // Check if the object is locked before getting the section contents. | |
1678 | gold_assert(obj->is_locked()); | |
1679 | ||
1680 | section_size_type plen; | |
1681 | *section_contents_ptr | |
1682 | = obj->section_contents(section.shndx, &plen, false); | |
1683 | *len = plen; | |
1684 | return LDPS_OK; | |
1685 | } | |
1686 | ||
1687 | // Specify the ordering of sections in the final layout. The sections are | |
1688 | // specified as (handle,shndx) pairs in the two arrays in the order in | |
1689 | // which they should appear in the final layout. | |
1690 | ||
1691 | static enum ld_plugin_status | |
f0558624 | 1692 | update_section_order(const struct ld_plugin_section* section_list, |
e9552f7e ST |
1693 | unsigned int num_sections) |
1694 | { | |
1695 | gold_assert(parameters->options().has_plugins()); | |
1696 | ||
1697 | if (num_sections == 0) | |
1698 | return LDPS_OK; | |
1699 | ||
1700 | if (section_list == NULL) | |
1701 | return LDPS_ERR; | |
1702 | ||
f0558624 ST |
1703 | Layout* layout = parameters->options().plugins()->layout(); |
1704 | gold_assert (layout != NULL); | |
e9552f7e | 1705 | |
f0558624 ST |
1706 | std::map<Section_id, unsigned int>* order_map |
1707 | = layout->get_section_order_map(); | |
1708 | ||
1709 | /* Store the mapping from Section_id to section position in layout's | |
1710 | order_map to consult after output sections are added. */ | |
e9552f7e ST |
1711 | for (unsigned int i = 0; i < num_sections; ++i) |
1712 | { | |
1713 | Object* obj = parameters->options().plugins()->get_elf_object( | |
1714 | section_list[i].handle); | |
1715 | if (obj == NULL) | |
1716 | return LDPS_BAD_HANDLE; | |
1717 | unsigned int shndx = section_list[i].shndx; | |
1718 | Section_id secn_id(obj, shndx); | |
f0558624 | 1719 | (*order_map)[secn_id] = i + 1; |
e9552f7e ST |
1720 | } |
1721 | ||
e9552f7e ST |
1722 | return LDPS_OK; |
1723 | } | |
1724 | ||
1725 | // Let the linker know that the sections could be reordered. | |
1726 | ||
1727 | static enum ld_plugin_status | |
1728 | allow_section_ordering() | |
1729 | { | |
1730 | gold_assert(parameters->options().has_plugins()); | |
1731 | Layout* layout = parameters->options().plugins()->layout(); | |
1732 | layout->set_section_ordering_specified(); | |
1733 | return LDPS_OK; | |
1734 | } | |
1735 | ||
16164a6b ST |
1736 | // Let the linker know that a subset of sections could be mapped |
1737 | // to a unique segment. | |
1738 | ||
1739 | static enum ld_plugin_status | |
1740 | allow_unique_segment_for_sections() | |
1741 | { | |
1742 | gold_assert(parameters->options().has_plugins()); | |
1743 | Layout* layout = parameters->options().plugins()->layout(); | |
1744 | layout->set_unique_segment_for_sections_specified(); | |
1745 | return LDPS_OK; | |
1746 | } | |
1747 | ||
1748 | // This function should map the list of sections specified in the | |
1749 | // SECTION_LIST to a unique segment. ELF segments do not have names | |
1750 | // and the NAME is used to identify Output Section which should contain | |
1751 | // the list of sections. This Output Section will then be mapped to | |
1752 | // a unique segment. FLAGS is used to specify if any additional segment | |
1753 | // flags need to be set. For instance, a specific segment flag can be | |
1754 | // set to identify this segment. Unsetting segment flags is not possible. | |
1755 | // ALIGN specifies the alignment of the segment. | |
1756 | ||
1757 | static enum ld_plugin_status | |
1758 | unique_segment_for_sections(const char* segment_name, | |
1759 | uint64_t flags, | |
1760 | uint64_t align, | |
1761 | const struct ld_plugin_section* section_list, | |
1762 | unsigned int num_sections) | |
1763 | { | |
1764 | gold_assert(parameters->options().has_plugins()); | |
1765 | ||
1766 | if (num_sections == 0) | |
1767 | return LDPS_OK; | |
1768 | ||
1769 | if (section_list == NULL) | |
1770 | return LDPS_ERR; | |
1771 | ||
1772 | Layout* layout = parameters->options().plugins()->layout(); | |
1773 | gold_assert (layout != NULL); | |
1774 | ||
1775 | Layout::Unique_segment_info* s = new Layout::Unique_segment_info; | |
1776 | s->name = segment_name; | |
1777 | s->flags = flags; | |
1778 | s->align = align; | |
1779 | ||
1780 | for (unsigned int i = 0; i < num_sections; ++i) | |
1781 | { | |
1782 | Object* obj = parameters->options().plugins()->get_elf_object( | |
1783 | section_list[i].handle); | |
1784 | if (obj == NULL) | |
1785 | return LDPS_BAD_HANDLE; | |
1786 | unsigned int shndx = section_list[i].shndx; | |
1787 | Const_section_id secn_id(obj, shndx); | |
1788 | layout->insert_section_segment_map(secn_id, s); | |
1789 | } | |
1790 | ||
1791 | return LDPS_OK; | |
1792 | } | |
1793 | ||
89fc3421 CC |
1794 | #endif // ENABLE_PLUGINS |
1795 | ||
1796 | // Allocate a Pluginobj object of the appropriate size and endianness. | |
1797 | ||
1798 | static Pluginobj* | |
0f7c0701 | 1799 | make_sized_plugin_object(Input_file* input_file, off_t offset, off_t filesize) |
89fc3421 | 1800 | { |
89fc3421 CC |
1801 | Pluginobj* obj = NULL; |
1802 | ||
029ba973 ILT |
1803 | parameters_force_valid_target(); |
1804 | const Target& target(parameters->target()); | |
89fc3421 | 1805 | |
029ba973 | 1806 | if (target.get_size() == 32) |
89fc3421 | 1807 | { |
029ba973 | 1808 | if (target.is_big_endian()) |
92f03fcb | 1809 | #ifdef HAVE_TARGET_32_BIG |
89fc3421 | 1810 | obj = new Sized_pluginobj<32, true>(input_file->filename(), |
0f7c0701 | 1811 | input_file, offset, filesize); |
92f03fcb CC |
1812 | #else |
1813 | gold_error(_("%s: not configured to support " | |
1814 | "32-bit big-endian object"), | |
1815 | input_file->filename().c_str()); | |
89fc3421 | 1816 | #endif |
89fc3421 | 1817 | else |
92f03fcb | 1818 | #ifdef HAVE_TARGET_32_LITTLE |
89fc3421 | 1819 | obj = new Sized_pluginobj<32, false>(input_file->filename(), |
0f7c0701 | 1820 | input_file, offset, filesize); |
92f03fcb CC |
1821 | #else |
1822 | gold_error(_("%s: not configured to support " | |
1823 | "32-bit little-endian object"), | |
1824 | input_file->filename().c_str()); | |
89fc3421 CC |
1825 | #endif |
1826 | } | |
029ba973 | 1827 | else if (target.get_size() == 64) |
89fc3421 | 1828 | { |
029ba973 | 1829 | if (target.is_big_endian()) |
92f03fcb | 1830 | #ifdef HAVE_TARGET_64_BIG |
89fc3421 | 1831 | obj = new Sized_pluginobj<64, true>(input_file->filename(), |
0f7c0701 | 1832 | input_file, offset, filesize); |
92f03fcb CC |
1833 | #else |
1834 | gold_error(_("%s: not configured to support " | |
1835 | "64-bit big-endian object"), | |
1836 | input_file->filename().c_str()); | |
89fc3421 | 1837 | #endif |
89fc3421 | 1838 | else |
92f03fcb | 1839 | #ifdef HAVE_TARGET_64_LITTLE |
89fc3421 | 1840 | obj = new Sized_pluginobj<64, false>(input_file->filename(), |
0f7c0701 | 1841 | input_file, offset, filesize); |
92f03fcb CC |
1842 | #else |
1843 | gold_error(_("%s: not configured to support " | |
1844 | "64-bit little-endian object"), | |
1845 | input_file->filename().c_str()); | |
89fc3421 CC |
1846 | #endif |
1847 | } | |
1848 | ||
1849 | gold_assert(obj != NULL); | |
89fc3421 CC |
1850 | return obj; |
1851 | } | |
1852 | ||
1853 | } // End namespace gold. |