1 // plugin.cc -- plugin manager for gold -*- C++ -*- 2 3 // Copyright (C) 2008-2020 Free Software Foundation, Inc. 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 23 #include "gold.h" 24 25 #include <cerrno> 26 #include <cstdio> 27 #include <cstdarg> 28 #include <cstring> 29 #include <string> 30 #include <vector> 31 #include <fcntl.h> 32 #include <unistd.h> 33 #include "libiberty.h" 34 35 #ifdef ENABLE_PLUGINS 36 #ifdef HAVE_DLFCN_H 37 #include <dlfcn.h> 38 #elif defined (HAVE_WINDOWS_H) 39 #include <windows.h> 40 #else 41 #error Unknown how to handle dynamic-load-libraries. 42 #endif 43 44 #if !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) 45 46 #define RTLD_NOW 0 /* Dummy value. */ 47 static void * 48 dlopen(const char *file, int mode ATTRIBUTE_UNUSED) 49 { 50 return LoadLibrary(file); 51 } 52 53 static void * 54 dlsym(void *handle, const char *name) 55 { 56 return reinterpret_cast<void *>( 57 GetProcAddress(static_cast<HMODULE>(handle),name)); 58 } 59 60 static const char * 61 dlerror(void) 62 { 63 return "unable to load dll"; 64 } 65 66 #endif /* !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) */ 67 #endif /* ENABLE_PLUGINS */ 68 69 #include "parameters.h" 70 #include "debug.h" 71 #include "errors.h" 72 #include "fileread.h" 73 #include "layout.h" 74 #include "options.h" 75 #include "plugin.h" 76 #include "target.h" 77 #include "readsyms.h" 78 #include "symtab.h" 79 #include "descriptors.h" 80 #include "elfcpp.h" 81 82 namespace gold 83 { 84 85 #ifdef ENABLE_PLUGINS 86 87 // The linker's exported interfaces. 88 89 extern "C" 90 { 91 92 static enum ld_plugin_status 93 register_claim_file(ld_plugin_claim_file_handler handler); 94 95 static enum ld_plugin_status 96 register_all_symbols_read(ld_plugin_all_symbols_read_handler handler); 97 98 static enum ld_plugin_status 99 register_cleanup(ld_plugin_cleanup_handler handler); 100 101 static enum ld_plugin_status 102 add_symbols(void *handle, int nsyms, const struct ld_plugin_symbol *syms); 103 104 static enum ld_plugin_status 105 get_input_file(const void *handle, struct ld_plugin_input_file *file); 106 107 static enum ld_plugin_status 108 get_view(const void *handle, const void **viewp); 109 110 static enum ld_plugin_status 111 release_input_file(const void *handle); 112 113 static enum ld_plugin_status 114 get_symbols(const void *handle, int nsyms, struct ld_plugin_symbol *syms); 115 116 static enum ld_plugin_status 117 get_symbols_v2(const void *handle, int nsyms, struct ld_plugin_symbol *syms); 118 119 static enum ld_plugin_status 120 get_symbols_v3(const void *handle, int nsyms, struct ld_plugin_symbol *syms); 121 122 static enum ld_plugin_status 123 add_input_file(const char *pathname); 124 125 static enum ld_plugin_status 126 add_input_library(const char *pathname); 127 128 static enum ld_plugin_status 129 set_extra_library_path(const char *path); 130 131 static enum ld_plugin_status 132 message(int level, const char *format, ...); 133 134 static enum ld_plugin_status 135 get_input_section_count(const void* handle, unsigned int* count); 136 137 static enum ld_plugin_status 138 get_input_section_type(const struct ld_plugin_section section, 139 unsigned int* type); 140 141 static enum ld_plugin_status 142 get_input_section_name(const struct ld_plugin_section section, 143 char** section_name_ptr); 144 145 static enum ld_plugin_status 146 get_input_section_contents(const struct ld_plugin_section section, 147 const unsigned char** section_contents, 148 size_t* len); 149 150 static enum ld_plugin_status 151 update_section_order(const struct ld_plugin_section *section_list, 152 unsigned int num_sections); 153 154 static enum ld_plugin_status 155 allow_section_ordering(); 156 157 static enum ld_plugin_status 158 allow_unique_segment_for_sections(); 159 160 static enum ld_plugin_status 161 unique_segment_for_sections(const char* segment_name, 162 uint64_t flags, 163 uint64_t align, 164 const struct ld_plugin_section *section_list, 165 unsigned int num_sections); 166 167 static enum ld_plugin_status 168 get_input_section_alignment(const struct ld_plugin_section section, 169 unsigned int* addralign); 170 171 static enum ld_plugin_status 172 get_input_section_size(const struct ld_plugin_section section, 173 uint64_t* secsize); 174 175 static enum ld_plugin_status 176 register_new_input(ld_plugin_new_input_handler handler); 177 178 static enum ld_plugin_status 179 get_wrap_symbols(uint64_t *num_symbols, const char ***wrap_symbol_list); 180 181 }; 182 183 #endif // ENABLE_PLUGINS 184 185 static Pluginobj* make_sized_plugin_object(const std::string& filename, 186 Input_file* input_file, 187 off_t offset, off_t filesize); 188 189 // Plugin methods. 190 191 // Load one plugin library. 192 193 void 194 Plugin::load() 195 { 196 #ifdef ENABLE_PLUGINS 197 // Load the plugin library. 198 // FIXME: Look for the library in standard locations. 199 this->handle_ = dlopen(this->filename_.c_str(), RTLD_NOW); 200 if (this->handle_ == NULL) 201 { 202 gold_error(_("%s: could not load plugin library: %s"), 203 this->filename_.c_str(), dlerror()); 204 return; 205 } 206 207 // Find the plugin's onload entry point. 208 void* ptr = dlsym(this->handle_, "onload"); 209 if (ptr == NULL) 210 { 211 gold_error(_("%s: could not find onload entry point"), 212 this->filename_.c_str()); 213 return; 214 } 215 ld_plugin_onload onload; 216 gold_assert(sizeof(onload) == sizeof(ptr)); 217 memcpy(&onload, &ptr, sizeof(ptr)); 218 219 // Get the linker's version number. 220 const char* ver = get_version_string(); 221 int major = 0; 222 int minor = 0; 223 sscanf(ver, "%d.%d", &major, &minor); 224 225 // Allocate and populate a transfer vector. 226 const int tv_fixed_size = 31; 227 228 int tv_size = this->args_.size() + tv_fixed_size; 229 ld_plugin_tv* tv = new ld_plugin_tv[tv_size]; 230 231 // Put LDPT_MESSAGE at the front of the list so the plugin can use it 232 // while processing subsequent entries. 233 int i = 0; 234 tv[i].tv_tag = LDPT_MESSAGE; 235 tv[i].tv_u.tv_message = message; 236 237 ++i; 238 tv[i].tv_tag = LDPT_API_VERSION; 239 tv[i].tv_u.tv_val = LD_PLUGIN_API_VERSION; 240 241 ++i; 242 tv[i].tv_tag = LDPT_GOLD_VERSION; 243 tv[i].tv_u.tv_val = major * 100 + minor; 244 245 ++i; 246 tv[i].tv_tag = LDPT_LINKER_OUTPUT; 247 if (parameters->options().relocatable()) 248 tv[i].tv_u.tv_val = LDPO_REL; 249 else if (parameters->options().shared()) 250 tv[i].tv_u.tv_val = LDPO_DYN; 251 else if (parameters->options().pie()) 252 tv[i].tv_u.tv_val = LDPO_PIE; 253 else 254 tv[i].tv_u.tv_val = LDPO_EXEC; 255 256 ++i; 257 tv[i].tv_tag = LDPT_OUTPUT_NAME; 258 tv[i].tv_u.tv_string = parameters->options().output(); 259 260 for (unsigned int j = 0; j < this->args_.size(); ++j) 261 { 262 ++i; 263 tv[i].tv_tag = LDPT_OPTION; 264 tv[i].tv_u.tv_string = this->args_[j].c_str(); 265 } 266 267 ++i; 268 tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK; 269 tv[i].tv_u.tv_register_claim_file = register_claim_file; 270 271 ++i; 272 tv[i].tv_tag = LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK; 273 tv[i].tv_u.tv_register_all_symbols_read = register_all_symbols_read; 274 275 ++i; 276 tv[i].tv_tag = LDPT_REGISTER_CLEANUP_HOOK; 277 tv[i].tv_u.tv_register_cleanup = register_cleanup; 278 279 ++i; 280 tv[i].tv_tag = LDPT_ADD_SYMBOLS; 281 tv[i].tv_u.tv_add_symbols = add_symbols; 282 283 ++i; 284 tv[i].tv_tag = LDPT_GET_INPUT_FILE; 285 tv[i].tv_u.tv_get_input_file = get_input_file; 286 287 ++i; 288 tv[i].tv_tag = LDPT_GET_VIEW; 289 tv[i].tv_u.tv_get_view = get_view; 290 291 ++i; 292 tv[i].tv_tag = LDPT_RELEASE_INPUT_FILE; 293 tv[i].tv_u.tv_release_input_file = release_input_file; 294 295 ++i; 296 tv[i].tv_tag = LDPT_GET_SYMBOLS; 297 tv[i].tv_u.tv_get_symbols = get_symbols; 298 299 ++i; 300 tv[i].tv_tag = LDPT_GET_SYMBOLS_V2; 301 tv[i].tv_u.tv_get_symbols = get_symbols_v2; 302 303 ++i; 304 tv[i].tv_tag = LDPT_GET_SYMBOLS_V3; 305 tv[i].tv_u.tv_get_symbols = get_symbols_v3; 306 307 ++i; 308 tv[i].tv_tag = LDPT_ADD_INPUT_FILE; 309 tv[i].tv_u.tv_add_input_file = add_input_file; 310 311 ++i; 312 tv[i].tv_tag = LDPT_ADD_INPUT_LIBRARY; 313 tv[i].tv_u.tv_add_input_library = add_input_library; 314 315 ++i; 316 tv[i].tv_tag = LDPT_SET_EXTRA_LIBRARY_PATH; 317 tv[i].tv_u.tv_set_extra_library_path = set_extra_library_path; 318 319 ++i; 320 tv[i].tv_tag = LDPT_GET_INPUT_SECTION_COUNT; 321 tv[i].tv_u.tv_get_input_section_count = get_input_section_count; 322 323 ++i; 324 tv[i].tv_tag = LDPT_GET_INPUT_SECTION_TYPE; 325 tv[i].tv_u.tv_get_input_section_type = get_input_section_type; 326 327 ++i; 328 tv[i].tv_tag = LDPT_GET_INPUT_SECTION_NAME; 329 tv[i].tv_u.tv_get_input_section_name = get_input_section_name; 330 331 ++i; 332 tv[i].tv_tag = LDPT_GET_INPUT_SECTION_CONTENTS; 333 tv[i].tv_u.tv_get_input_section_contents = get_input_section_contents; 334 335 ++i; 336 tv[i].tv_tag = LDPT_UPDATE_SECTION_ORDER; 337 tv[i].tv_u.tv_update_section_order = update_section_order; 338 339 ++i; 340 tv[i].tv_tag = LDPT_ALLOW_SECTION_ORDERING; 341 tv[i].tv_u.tv_allow_section_ordering = allow_section_ordering; 342 343 ++i; 344 tv[i].tv_tag = LDPT_ALLOW_UNIQUE_SEGMENT_FOR_SECTIONS; 345 tv[i].tv_u.tv_allow_unique_segment_for_sections 346 = allow_unique_segment_for_sections; 347 348 ++i; 349 tv[i].tv_tag = LDPT_UNIQUE_SEGMENT_FOR_SECTIONS; 350 tv[i].tv_u.tv_unique_segment_for_sections = unique_segment_for_sections; 351 352 ++i; 353 tv[i].tv_tag = LDPT_GET_INPUT_SECTION_ALIGNMENT; 354 tv[i].tv_u.tv_get_input_section_alignment = get_input_section_alignment; 355 356 ++i; 357 tv[i].tv_tag = LDPT_GET_INPUT_SECTION_SIZE; 358 tv[i].tv_u.tv_get_input_section_size = get_input_section_size; 359 360 ++i; 361 tv[i].tv_tag = LDPT_REGISTER_NEW_INPUT_HOOK; 362 tv[i].tv_u.tv_register_new_input = register_new_input; 363 364 ++i; 365 tv[i].tv_tag = LDPT_GET_WRAP_SYMBOLS; 366 tv[i].tv_u.tv_get_wrap_symbols = get_wrap_symbols; 367 368 ++i; 369 tv[i].tv_tag = LDPT_NULL; 370 tv[i].tv_u.tv_val = 0; 371 372 gold_assert(i == tv_size - 1); 373 374 // Call the onload entry point. 375 (*onload)(tv); 376 377 delete[] tv; 378 #endif // ENABLE_PLUGINS 379 } 380 381 // Call the plugin claim-file handler. 382 383 inline bool 384 Plugin::claim_file(struct ld_plugin_input_file* plugin_input_file) 385 { 386 int claimed = 0; 387 388 if (this->claim_file_handler_ != NULL) 389 { 390 (*this->claim_file_handler_)(plugin_input_file, &claimed); 391 if (claimed) 392 return true; 393 } 394 return false; 395 } 396 397 // Call the all-symbols-read handler. 398 399 inline void 400 Plugin::all_symbols_read() 401 { 402 if (this->all_symbols_read_handler_ != NULL) 403 (*this->all_symbols_read_handler_)(); 404 } 405 406 // Call the new_input handler. 407 408 inline void 409 Plugin::new_input(struct ld_plugin_input_file* plugin_input_file) 410 { 411 if (this->new_input_handler_ != NULL) 412 (*this->new_input_handler_)(plugin_input_file); 413 } 414 415 // Call the cleanup handler. 416 417 inline void 418 Plugin::cleanup() 419 { 420 if (this->cleanup_handler_ != NULL && !this->cleanup_done_) 421 { 422 // Set this flag before calling to prevent a recursive plunge 423 // in the event that a plugin's cleanup handler issues a 424 // fatal error. 425 this->cleanup_done_ = true; 426 (*this->cleanup_handler_)(); 427 } 428 } 429 430 // This task is used to rescan archives as needed. 431 432 class Plugin_rescan : public Task 433 { 434 public: 435 Plugin_rescan(Task_token* this_blocker, Task_token* next_blocker) 436 : this_blocker_(this_blocker), next_blocker_(next_blocker) 437 { } 438 439 ~Plugin_rescan() 440 { 441 delete this->this_blocker_; 442 } 443 444 Task_token* 445 is_runnable() 446 { 447 if (this->this_blocker_->is_blocked()) 448 return this->this_blocker_; 449 return NULL; 450 } 451 452 void 453 locks(Task_locker* tl) 454 { tl->add(this, this->next_blocker_); } 455 456 void 457 run(Workqueue*) 458 { parameters->options().plugins()->rescan(this); } 459 460 std::string 461 get_name() const 462 { return "Plugin_rescan"; } 463 464 private: 465 Task_token* this_blocker_; 466 Task_token* next_blocker_; 467 }; 468 469 // Plugin_recorder logs plugin actions and saves intermediate files 470 // for later replay. 471 472 class Plugin_recorder 473 { 474 public: 475 Plugin_recorder() : file_count_(0), tempdir_(NULL), logfile_(NULL) 476 { } 477 478 bool 479 init(); 480 481 void 482 claimed_file(const std::string& obj_name, off_t offset, off_t filesize, 483 const std::string& plugin_name); 484 485 void 486 unclaimed_file(const std::string& obj_name, off_t offset, off_t filesize); 487 488 void 489 replacement_file(const char* name, bool is_lib); 490 491 void 492 record_symbols(const Object* obj, int nsyms, 493 const struct ld_plugin_symbol* syms); 494 495 void 496 finish() 497 { ::fclose(this->logfile_); } 498 499 private: 500 unsigned int file_count_; 501 const char* tempdir_; 502 FILE* logfile_; 503 }; 504 505 bool 506 Plugin_recorder::init() 507 { 508 // Create a temporary directory where we can stash the log and 509 // copies of replacement files. 510 char dir_template[] = "gold-recording-XXXXXX"; 511 #ifdef HAVE_MKDTEMP 512 if (mkdtemp(dir_template) == NULL) 513 return false; 514 #else 515 if (mktemp(dir_template) == NULL) 516 return false; 517 #if defined (_WIN32) && !defined (__CYGWIN32__) 518 if (mkdir(dir_template) != 0) 519 return false; 520 #else 521 if (mkdir(dir_template, 0700) != 0) 522 return false; 523 #endif 524 #endif 525 526 size_t len = strlen(dir_template) + 1; 527 char* tempdir = new char[len]; 528 strncpy(tempdir, dir_template, len); 529 530 // Create the log file. 531 std::string logname(tempdir); 532 logname.append("/log"); 533 FILE* logfile = ::fopen(logname.c_str(), "w"); 534 if (logfile == NULL) 535 return false; 536 537 this->tempdir_ = tempdir; 538 this->logfile_ = logfile; 539 540 gold_info(_("%s: recording to %s"), program_name, this->tempdir_); 541 542 return true; 543 } 544 545 void 546 Plugin_recorder::claimed_file(const std::string& obj_name, 547 off_t offset, 548 off_t filesize, 549 const std::string& plugin_name) 550 { 551 fprintf(this->logfile_, "PLUGIN: %s\n", plugin_name.c_str()); 552 fprintf(this->logfile_, "CLAIMED: %s", obj_name.c_str()); 553 if (offset > 0) 554 fprintf(this->logfile_, " @%ld", static_cast<long>(offset)); 555 fprintf(this->logfile_, " %ld\n", static_cast<long>(filesize)); 556 } 557 558 void 559 Plugin_recorder::unclaimed_file(const std::string& obj_name, 560 off_t offset, 561 off_t filesize) 562 { 563 fprintf(this->logfile_, "UNCLAIMED: %s", obj_name.c_str()); 564 if (offset > 0) 565 fprintf(this->logfile_, " @%ld", static_cast<long>(offset)); 566 fprintf(this->logfile_, " %ld\n", static_cast<long>(filesize)); 567 } 568 569 // Make a hard link to INNAME from OUTNAME, if possible. 570 // If not, copy the file. 571 572 static bool 573 link_or_copy_file(const char* inname, const char* outname) 574 { 575 static char buf[4096]; 576 577 #ifdef HAVE_LINK 578 if (::link(inname, outname) == 0) 579 return true; 580 #endif 581 582 int in = ::open(inname, O_RDONLY); 583 if (in < 0) 584 { 585 gold_warning(_("%s: can't open (%s)"), inname, strerror(errno)); 586 return false; 587 } 588 int out = ::open(outname, O_CREAT | O_TRUNC | O_WRONLY, 0600); 589 if (out < 0) 590 { 591 gold_warning(_("%s: can't create (%s)"), outname, strerror(errno)); 592 ::close(in); 593 return false; 594 } 595 ssize_t len; 596 while ((len = ::read(in, buf, sizeof(buf))) > 0) 597 { 598 if (::write(out, buf, len) != len) 599 { 600 gold_warning(_("%s: write error while making copy of file (%s)"), 601 inname, strerror(errno)); 602 break; 603 } 604 } 605 ::close(in); 606 ::close(out); 607 return true; 608 } 609 610 void 611 Plugin_recorder::replacement_file(const char* name, bool is_lib) 612 { 613 fprintf(this->logfile_, "REPLACEMENT: %s", name); 614 if (is_lib) 615 fprintf(this->logfile_, "(lib)"); 616 else 617 { 618 char counter[10]; 619 const char* basename = lbasename(name); 620 snprintf(counter, sizeof(counter), "%05d", this->file_count_); 621 ++this->file_count_; 622 std::string outname(this->tempdir_); 623 outname.append("/"); 624 outname.append(counter); 625 outname.append("-"); 626 outname.append(basename); 627 if (link_or_copy_file(name, outname.c_str())) 628 fprintf(this->logfile_, " -> %s", outname.c_str()); 629 } 630 fprintf(this->logfile_, "\n"); 631 } 632 633 void 634 Plugin_recorder::record_symbols(const Object* obj, int nsyms, 635 const struct ld_plugin_symbol* syms) 636 { 637 fprintf(this->logfile_, "SYMBOLS: %d %s\n", nsyms, obj->name().c_str()); 638 for (int i = 0; i < nsyms; ++i) 639 { 640 const struct ld_plugin_symbol* isym = &syms[i]; 641 642 const char* def; 643 switch (isym->def) 644 { 645 case LDPK_DEF: 646 def = "D"; 647 break; 648 case LDPK_WEAKDEF: 649 def = "WD"; 650 break; 651 case LDPK_UNDEF: 652 def = "U"; 653 break; 654 case LDPK_WEAKUNDEF: 655 def = "WU"; 656 break; 657 case LDPK_COMMON: 658 def = "C"; 659 break; 660 default: 661 def = "?"; 662 break; 663 } 664 665 char vis; 666 switch (isym->visibility) 667 { 668 case LDPV_PROTECTED: 669 vis = 'P'; 670 break; 671 case LDPV_INTERNAL: 672 vis = 'I'; 673 break; 674 case LDPV_HIDDEN: 675 vis = 'H'; 676 break; 677 case LDPV_DEFAULT: 678 vis = 'D'; 679 break; 680 default: 681 vis = '?'; 682 break; 683 } 684 685 fprintf(this->logfile_, " %5d: %-2s %c %s", i, def, vis, isym->name); 686 if (isym->version != NULL && isym->version[0] != '\0') 687 fprintf(this->logfile_, "@%s", isym->version); 688 if (isym->comdat_key != NULL && isym->comdat_key[0] != '\0') 689 { 690 if (strcmp(isym->name, isym->comdat_key) == 0) 691 fprintf(this->logfile_, " [comdat]"); 692 else 693 fprintf(this->logfile_, " [comdat: %s]", isym->comdat_key); 694 } 695 fprintf(this->logfile_, "\n"); 696 } 697 } 698 699 // Plugin_manager methods. 700 701 Plugin_manager::~Plugin_manager() 702 { 703 for (Plugin_list::iterator p = this->plugins_.begin(); 704 p != this->plugins_.end(); 705 ++p) 706 delete *p; 707 this->plugins_.clear(); 708 for (Object_list::iterator obj = this->objects_.begin(); 709 obj != this->objects_.end(); 710 ++obj) 711 delete *obj; 712 this->objects_.clear(); 713 delete this->lock_; 714 delete this->recorder_; 715 } 716 717 // Load all plugin libraries. 718 719 void 720 Plugin_manager::load_plugins(Layout* layout) 721 { 722 this->layout_ = layout; 723 724 if (is_debugging_enabled(DEBUG_PLUGIN)) 725 { 726 this->recorder_ = new Plugin_recorder(); 727 this->recorder_->init(); 728 } 729 730 for (this->current_ = this->plugins_.begin(); 731 this->current_ != this->plugins_.end(); 732 ++this->current_) 733 (*this->current_)->load(); 734 } 735 736 // Call the plugin claim-file handlers in turn to see if any claim the file. 737 738 Pluginobj* 739 Plugin_manager::claim_file(Input_file* input_file, off_t offset, 740 off_t filesize, Object* elf_object) 741 { 742 bool lock_initialized = this->initialize_lock_.initialize(); 743 744 gold_assert(lock_initialized); 745 Hold_lock hl(*this->lock_); 746 747 unsigned int handle = this->objects_.size(); 748 this->input_file_ = input_file; 749 this->plugin_input_file_.name = input_file->filename().c_str(); 750 this->plugin_input_file_.fd = input_file->file().descriptor(); 751 this->plugin_input_file_.offset = offset; 752 this->plugin_input_file_.filesize = filesize; 753 this->plugin_input_file_.handle = reinterpret_cast<void*>(handle); 754 if (elf_object != NULL) 755 this->objects_.push_back(elf_object); 756 this->in_claim_file_handler_ = true; 757 758 for (this->current_ = this->plugins_.begin(); 759 this->current_ != this->plugins_.end(); 760 ++this->current_) 761 { 762 // If we aren't yet in replacement phase, allow plugins to claim input 763 // files, otherwise notify the plugin of the new input file, if needed. 764 if (!this->in_replacement_phase_) 765 { 766 if ((*this->current_)->claim_file(&this->plugin_input_file_)) 767 { 768 this->any_claimed_ = true; 769 this->in_claim_file_handler_ = false; 770 771 if (this->recorder_ != NULL) 772 { 773 const std::string& objname = (elf_object == NULL 774 ? input_file->filename() 775 : elf_object->name()); 776 this->recorder_->claimed_file(objname, 777 offset, filesize, 778 (*this->current_)->filename()); 779 } 780 781 if (this->objects_.size() > handle 782 && this->objects_[handle]->pluginobj() != NULL) 783 return this->objects_[handle]->pluginobj(); 784 785 // If the plugin claimed the file but did not call the 786 // add_symbols callback, we need to create the Pluginobj now. 787 Pluginobj* obj = this->make_plugin_object(handle); 788 return obj; 789 } 790 } 791 else 792 { 793 (*this->current_)->new_input(&this->plugin_input_file_); 794 } 795 } 796 797 this->in_claim_file_handler_ = false; 798 799 if (this->recorder_ != NULL) 800 this->recorder_->unclaimed_file(input_file->filename(), offset, filesize); 801 802 return NULL; 803 } 804 805 // Save an archive. This is used so that a plugin can add a file 806 // which refers to a symbol which was not previously referenced. In 807 // that case we want to pretend that the symbol was referenced before, 808 // and pull in the archive object. 809 810 void 811 Plugin_manager::save_archive(Archive* archive) 812 { 813 if (this->in_replacement_phase_ || !this->any_claimed_) 814 delete archive; 815 else 816 this->rescannable_.push_back(Rescannable(archive)); 817 } 818 819 // Save an Input_group. This is like save_archive. 820 821 void 822 Plugin_manager::save_input_group(Input_group* input_group) 823 { 824 if (this->in_replacement_phase_ || !this->any_claimed_) 825 delete input_group; 826 else 827 this->rescannable_.push_back(Rescannable(input_group)); 828 } 829 830 // Call the all-symbols-read handlers. 831 832 void 833 Plugin_manager::all_symbols_read(Workqueue* workqueue, Task* task, 834 Input_objects* input_objects, 835 Symbol_table* symtab, 836 Dirsearch* dirpath, Mapfile* mapfile, 837 Task_token** last_blocker) 838 { 839 this->in_replacement_phase_ = true; 840 this->workqueue_ = workqueue; 841 this->task_ = task; 842 this->input_objects_ = input_objects; 843 this->symtab_ = symtab; 844 this->dirpath_ = dirpath; 845 this->mapfile_ = mapfile; 846 this->this_blocker_ = NULL; 847 848 // Set symbols used in defsym expressions as seen in real ELF. 849 Layout *layout = parameters->options().plugins()->layout(); 850 layout->script_options()->set_defsym_uses_in_real_elf(symtab); 851 layout->script_options()->find_defsym_defs(this->defsym_defines_set_); 852 853 for (this->current_ = this->plugins_.begin(); 854 this->current_ != this->plugins_.end(); 855 ++this->current_) 856 (*this->current_)->all_symbols_read(); 857 858 if (this->any_added_) 859 { 860 Task_token* next_blocker = new Task_token(true); 861 next_blocker->add_blocker(); 862 workqueue->queue(new Plugin_rescan(this->this_blocker_, next_blocker)); 863 this->this_blocker_ = next_blocker; 864 } 865 866 *last_blocker = this->this_blocker_; 867 } 868 869 // This is called when we see a new undefined symbol. If we are in 870 // the replacement phase, this means that we may need to rescan some 871 // archives we have previously seen. 872 873 void 874 Plugin_manager::new_undefined_symbol(Symbol* sym) 875 { 876 if (this->in_replacement_phase_) 877 this->undefined_symbols_.push_back(sym); 878 } 879 880 // Rescan archives as needed. This handles the case where a new 881 // object file added by a plugin has an undefined reference to some 882 // symbol defined in an archive. 883 884 void 885 Plugin_manager::rescan(Task* task) 886 { 887 size_t rescan_pos = 0; 888 size_t rescan_size = this->rescannable_.size(); 889 while (!this->undefined_symbols_.empty()) 890 { 891 if (rescan_pos >= rescan_size) 892 { 893 this->undefined_symbols_.clear(); 894 return; 895 } 896 897 Undefined_symbol_list undefs; 898 undefs.reserve(this->undefined_symbols_.size()); 899 this->undefined_symbols_.swap(undefs); 900 901 size_t min_rescan_pos = rescan_size; 902 903 for (Undefined_symbol_list::const_iterator p = undefs.begin(); 904 p != undefs.end(); 905 ++p) 906 { 907 if (!(*p)->is_undefined()) 908 continue; 909 910 this->undefined_symbols_.push_back(*p); 911 912 // Find the first rescan archive which defines this symbol, 913 // starting at the current rescan position. The rescan position 914 // exists so that given -la -lb -lc we don't look for undefined 915 // symbols in -lb back in -la, but instead get the definition 916 // from -lc. Don't bother to look past the current minimum 917 // rescan position. 918 for (size_t i = rescan_pos; i < min_rescan_pos; ++i) 919 { 920 if (this->rescannable_defines(i, *p)) 921 { 922 min_rescan_pos = i; 923 break; 924 } 925 } 926 } 927 928 if (min_rescan_pos >= rescan_size) 929 { 930 // We didn't find any rescannable archives which define any 931 // undefined symbols. 932 return; 933 } 934 935 const Rescannable& r(this->rescannable_[min_rescan_pos]); 936 if (r.is_archive) 937 { 938 Task_lock_obj<Archive> tl(task, r.u.archive); 939 r.u.archive->add_symbols(this->symtab_, this->layout_, 940 this->input_objects_, this->mapfile_); 941 } 942 else 943 { 944 size_t next_saw_undefined = this->symtab_->saw_undefined(); 945 size_t saw_undefined; 946 do 947 { 948 saw_undefined = next_saw_undefined; 949 950 for (Input_group::const_iterator p = r.u.input_group->begin(); 951 p != r.u.input_group->end(); 952 ++p) 953 { 954 Task_lock_obj<Archive> tl(task, *p); 955 956 (*p)->add_symbols(this->symtab_, this->layout_, 957 this->input_objects_, this->mapfile_); 958 } 959 960 next_saw_undefined = this->symtab_->saw_undefined(); 961 } 962 while (saw_undefined != next_saw_undefined); 963 } 964 965 for (size_t i = rescan_pos; i < min_rescan_pos + 1; ++i) 966 { 967 if (this->rescannable_[i].is_archive) 968 delete this->rescannable_[i].u.archive; 969 else 970 delete this->rescannable_[i].u.input_group; 971 } 972 973 rescan_pos = min_rescan_pos + 1; 974 } 975 } 976 977 // Return whether the rescannable at index I defines SYM. 978 979 bool 980 Plugin_manager::rescannable_defines(size_t i, Symbol* sym) 981 { 982 const Rescannable& r(this->rescannable_[i]); 983 if (r.is_archive) 984 return r.u.archive->defines_symbol(sym); 985 else 986 { 987 for (Input_group::const_iterator p = r.u.input_group->begin(); 988 p != r.u.input_group->end(); 989 ++p) 990 { 991 if ((*p)->defines_symbol(sym)) 992 return true; 993 } 994 return false; 995 } 996 } 997 998 // Layout deferred objects. 999 1000 void 1001 Plugin_manager::layout_deferred_objects() 1002 { 1003 Deferred_layout_list::iterator obj; 1004 1005 for (obj = this->deferred_layout_objects_.begin(); 1006 obj != this->deferred_layout_objects_.end(); 1007 ++obj) 1008 { 1009 // Lock the object so we can read from it. This is only called 1010 // single-threaded from queue_middle_tasks, so it is OK to lock. 1011 // Unfortunately we have no way to pass in a Task token. 1012 const Task* dummy_task = reinterpret_cast<const Task*>(-1); 1013 Task_lock_obj<Object> tl(dummy_task, *obj); 1014 (*obj)->layout_deferred_sections(this->layout_); 1015 } 1016 } 1017 1018 // Call the cleanup handlers. 1019 1020 void 1021 Plugin_manager::cleanup() 1022 { 1023 if (this->any_added_) 1024 { 1025 // If any input files were added, close all the input files. 1026 // This is because the plugin may want to remove them, and on 1027 // Windows you are not allowed to remove an open file. 1028 close_all_descriptors(); 1029 } 1030 1031 for (this->current_ = this->plugins_.begin(); 1032 this->current_ != this->plugins_.end(); 1033 ++this->current_) 1034 (*this->current_)->cleanup(); 1035 } 1036 1037 // Make a new Pluginobj object. This is called when the plugin calls 1038 // the add_symbols API. 1039 1040 Pluginobj* 1041 Plugin_manager::make_plugin_object(unsigned int handle) 1042 { 1043 // Make sure we aren't asked to make an object for the same handle twice. 1044 if (this->objects_.size() != handle 1045 && this->objects_[handle]->pluginobj() != NULL) 1046 return NULL; 1047 1048 const std::string* filename = &this->input_file_->filename(); 1049 1050 // If the elf object for this file was pushed into the objects_ vector, 1051 // use its filename, then delete it to make room for the Pluginobj as 1052 // this file is claimed. 1053 if (this->objects_.size() != handle) 1054 { 1055 filename = &this->objects_.back()->name(); 1056 this->objects_.pop_back(); 1057 } 1058 1059 Pluginobj* obj = make_sized_plugin_object(*filename, 1060 this->input_file_, 1061 this->plugin_input_file_.offset, 1062 this->plugin_input_file_.filesize); 1063 1064 1065 1066 this->objects_.push_back(obj); 1067 return obj; 1068 } 1069 1070 // Get the input file information with an open (possibly re-opened) 1071 // file descriptor. 1072 1073 ld_plugin_status 1074 Plugin_manager::get_input_file(unsigned int handle, 1075 struct ld_plugin_input_file* file) 1076 { 1077 Pluginobj* obj = this->object(handle)->pluginobj(); 1078 if (obj == NULL) 1079 return LDPS_BAD_HANDLE; 1080 1081 obj->lock(this->task_); 1082 file->name = obj->filename().c_str(); 1083 file->fd = obj->descriptor(); 1084 file->offset = obj->offset(); 1085 file->filesize = obj->filesize(); 1086 file->handle = reinterpret_cast<void*>(handle); 1087 return LDPS_OK; 1088 } 1089 1090 // Release the input file. 1091 1092 ld_plugin_status 1093 Plugin_manager::release_input_file(unsigned int handle) 1094 { 1095 if (this->object(handle) == NULL) 1096 return LDPS_BAD_HANDLE; 1097 1098 Pluginobj* obj = this->object(handle)->pluginobj(); 1099 1100 if (obj == NULL) 1101 return LDPS_BAD_HANDLE; 1102 1103 obj->unlock(this->task_); 1104 return LDPS_OK; 1105 } 1106 1107 // Get the elf object corresponding to the handle. Return NULL if we 1108 // found a Pluginobj instead. 1109 1110 Object* 1111 Plugin_manager::get_elf_object(const void* handle) 1112 { 1113 Object* obj = this->object( 1114 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); 1115 1116 // The object should not be a Pluginobj. 1117 if (obj == NULL 1118 || obj->pluginobj() != NULL) 1119 return NULL; 1120 1121 return obj; 1122 } 1123 1124 ld_plugin_status 1125 Plugin_manager::get_view(unsigned int handle, const void **viewp) 1126 { 1127 off_t offset; 1128 size_t filesize; 1129 Input_file *input_file; 1130 if (this->in_claim_file_handler_) 1131 { 1132 // We are being called from the claim_file hook. 1133 const struct ld_plugin_input_file &f = this->plugin_input_file_; 1134 offset = f.offset; 1135 filesize = f.filesize; 1136 input_file = this->input_file_; 1137 } 1138 else 1139 { 1140 // An already claimed file. 1141 if (this->object(handle) == NULL) 1142 return LDPS_BAD_HANDLE; 1143 Pluginobj* obj = this->object(handle)->pluginobj(); 1144 if (obj == NULL) 1145 return LDPS_BAD_HANDLE; 1146 offset = obj->offset(); 1147 filesize = obj->filesize(); 1148 input_file = obj->input_file(); 1149 } 1150 *viewp = (void*) input_file->file().get_view(offset, 0, filesize, false, 1151 false); 1152 return LDPS_OK; 1153 } 1154 1155 // Add a new library path. 1156 1157 ld_plugin_status 1158 Plugin_manager::set_extra_library_path(const char* path) 1159 { 1160 this->extra_search_path_ = std::string(path); 1161 return LDPS_OK; 1162 } 1163 1164 // Add a new input file. 1165 1166 ld_plugin_status 1167 Plugin_manager::add_input_file(const char* pathname, bool is_lib) 1168 { 1169 Input_file_argument file(pathname, 1170 (is_lib 1171 ? Input_file_argument::INPUT_FILE_TYPE_LIBRARY 1172 : Input_file_argument::INPUT_FILE_TYPE_FILE), 1173 (is_lib 1174 ? this->extra_search_path_.c_str() 1175 : ""), 1176 false, 1177 this->options_); 1178 Input_argument* input_argument = new Input_argument(file); 1179 Task_token* next_blocker = new Task_token(true); 1180 next_blocker->add_blocker(); 1181 if (parameters->incremental()) 1182 gold_error(_("input files added by plug-ins in --incremental mode not " 1183 "supported yet")); 1184 1185 if (this->recorder_ != NULL) 1186 this->recorder_->replacement_file(pathname, is_lib); 1187 1188 this->workqueue_->queue_soon(new Read_symbols(this->input_objects_, 1189 this->symtab_, 1190 this->layout_, 1191 this->dirpath_, 1192 0, 1193 this->mapfile_, 1194 input_argument, 1195 NULL, 1196 NULL, 1197 this->this_blocker_, 1198 next_blocker)); 1199 this->this_blocker_ = next_blocker; 1200 this->any_added_ = true; 1201 return LDPS_OK; 1202 } 1203 1204 // Class Pluginobj. 1205 1206 Pluginobj::Pluginobj(const std::string& name, Input_file* input_file, 1207 off_t offset, off_t filesize) 1208 : Object(name, input_file, false, offset), 1209 nsyms_(0), syms_(NULL), symbols_(), filesize_(filesize), comdat_map_() 1210 { 1211 } 1212 1213 // Return TRUE if a defined symbol is referenced from outside the 1214 // universe of claimed objects. Only references from relocatable, 1215 // non-IR (unclaimed) objects count as a reference. References from 1216 // dynamic objects count only as "visible". 1217 1218 static inline bool 1219 is_referenced_from_outside(Symbol* lsym) 1220 { 1221 if (lsym->in_real_elf()) 1222 return true; 1223 if (parameters->options().relocatable()) 1224 return true; 1225 if (parameters->options().is_undefined(lsym->name())) 1226 return true; 1227 return false; 1228 } 1229 1230 // Return TRUE if a defined symbol might be reachable from outside the 1231 // load module. 1232 1233 static inline bool 1234 is_visible_from_outside(Symbol* lsym) 1235 { 1236 if (lsym->in_dyn()) 1237 return true; 1238 if (parameters->options().export_dynamic() || parameters->options().shared() 1239 || parameters->options().in_dynamic_list(lsym->name()) 1240 || parameters->options().is_export_dynamic_symbol(lsym->name())) 1241 return lsym->is_externally_visible(); 1242 return false; 1243 } 1244 1245 // Get symbol resolution info. 1246 1247 ld_plugin_status 1248 Pluginobj::get_symbol_resolution_info(Symbol_table* symtab, 1249 int nsyms, 1250 ld_plugin_symbol* syms, 1251 int version) const 1252 { 1253 // For version 1 of this interface, we cannot use 1254 // LDPR_PREVAILING_DEF_IRONLY_EXP, so we return LDPR_PREVAILING_DEF 1255 // instead. 1256 const ld_plugin_symbol_resolution ldpr_prevailing_def_ironly_exp 1257 = (version > 1 1258 ? LDPR_PREVAILING_DEF_IRONLY_EXP 1259 : LDPR_PREVAILING_DEF); 1260 1261 if (nsyms > this->nsyms_) 1262 return LDPS_NO_SYMS; 1263 1264 if (static_cast<size_t>(nsyms) > this->symbols_.size()) 1265 { 1266 // We never decided to include this object. We mark all symbols as 1267 // preempted. 1268 gold_assert(this->symbols_.size() == 0); 1269 for (int i = 0; i < nsyms; i++) 1270 syms[i].resolution = LDPR_PREEMPTED_REG; 1271 return version > 2 ? LDPS_NO_SYMS : LDPS_OK; 1272 } 1273 1274 Plugin_manager* plugins = parameters->options().plugins(); 1275 for (int i = 0; i < nsyms; i++) 1276 { 1277 ld_plugin_symbol* isym = &syms[i]; 1278 Symbol* lsym = this->symbols_[i]; 1279 if (lsym->is_forwarder()) 1280 lsym = symtab->resolve_forwards(lsym); 1281 ld_plugin_symbol_resolution res = LDPR_UNKNOWN; 1282 1283 if (plugins->is_defsym_def(lsym->name())) 1284 { 1285 // The symbol is redefined via defsym. 1286 res = LDPR_PREEMPTED_REG; 1287 } 1288 else if (lsym->is_undefined()) 1289 { 1290 // The symbol remains undefined. 1291 res = LDPR_UNDEF; 1292 } 1293 else if (isym->def == LDPK_UNDEF 1294 || isym->def == LDPK_WEAKUNDEF 1295 || isym->def == LDPK_COMMON) 1296 { 1297 // The original symbol was undefined or common. 1298 if (lsym->source() != Symbol::FROM_OBJECT) 1299 res = LDPR_RESOLVED_EXEC; 1300 else if (lsym->object()->pluginobj() == this) 1301 { 1302 if (is_referenced_from_outside(lsym)) 1303 res = LDPR_PREVAILING_DEF; 1304 else if (is_visible_from_outside(lsym)) 1305 res = ldpr_prevailing_def_ironly_exp; 1306 else 1307 res = LDPR_PREVAILING_DEF_IRONLY; 1308 } 1309 else if (lsym->object()->pluginobj() != NULL) 1310 res = LDPR_RESOLVED_IR; 1311 else if (lsym->object()->is_dynamic()) 1312 res = LDPR_RESOLVED_DYN; 1313 else 1314 res = LDPR_RESOLVED_EXEC; 1315 } 1316 else 1317 { 1318 // The original symbol was a definition. 1319 if (lsym->source() != Symbol::FROM_OBJECT) 1320 res = LDPR_PREEMPTED_REG; 1321 else if (lsym->object() == static_cast<const Object*>(this)) 1322 { 1323 if (is_referenced_from_outside(lsym)) 1324 res = LDPR_PREVAILING_DEF; 1325 else if (is_visible_from_outside(lsym)) 1326 res = ldpr_prevailing_def_ironly_exp; 1327 else 1328 res = LDPR_PREVAILING_DEF_IRONLY; 1329 } 1330 else 1331 res = (lsym->object()->pluginobj() != NULL 1332 ? LDPR_PREEMPTED_IR 1333 : LDPR_PREEMPTED_REG); 1334 } 1335 isym->resolution = res; 1336 } 1337 return LDPS_OK; 1338 } 1339 1340 // Return TRUE if the comdat group with key COMDAT_KEY from this object 1341 // should be kept. 1342 1343 bool 1344 Pluginobj::include_comdat_group(std::string comdat_key, Layout* layout) 1345 { 1346 std::pair<Comdat_map::iterator, bool> ins = 1347 this->comdat_map_.insert(std::make_pair(comdat_key, false)); 1348 1349 // If this is the first time we've seen this comdat key, ask the 1350 // layout object whether it should be included. 1351 if (ins.second) 1352 ins.first->second = layout->find_or_add_kept_section(comdat_key, 1353 NULL, 0, true, 1354 true, NULL); 1355 1356 return ins.first->second; 1357 } 1358 1359 // Class Sized_pluginobj. 1360 1361 template<int size, bool big_endian> 1362 Sized_pluginobj<size, big_endian>::Sized_pluginobj( 1363 const std::string& name, 1364 Input_file* input_file, 1365 off_t offset, 1366 off_t filesize) 1367 : Pluginobj(name, input_file, offset, filesize) 1368 { 1369 } 1370 1371 // Read the symbols. Not used for plugin objects. 1372 1373 template<int size, bool big_endian> 1374 void 1375 Sized_pluginobj<size, big_endian>::do_read_symbols(Read_symbols_data*) 1376 { 1377 gold_unreachable(); 1378 } 1379 1380 // Lay out the input sections. Not used for plugin objects. 1381 1382 template<int size, bool big_endian> 1383 void 1384 Sized_pluginobj<size, big_endian>::do_layout(Symbol_table*, Layout*, 1385 Read_symbols_data*) 1386 { 1387 gold_unreachable(); 1388 } 1389 1390 // Add the symbols to the symbol table. 1391 1392 template<int size, bool big_endian> 1393 void 1394 Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table* symtab, 1395 Read_symbols_data*, 1396 Layout* layout) 1397 { 1398 const int sym_size = elfcpp::Elf_sizes<size>::sym_size; 1399 unsigned char symbuf[sym_size]; 1400 elfcpp::Sym<size, big_endian> sym(symbuf); 1401 elfcpp::Sym_write<size, big_endian> osym(symbuf); 1402 1403 Plugin_recorder* recorder = parameters->options().plugins()->recorder(); 1404 if (recorder != NULL) 1405 recorder->record_symbols(this, this->nsyms_, this->syms_); 1406 1407 this->symbols_.resize(this->nsyms_); 1408 1409 for (int i = 0; i < this->nsyms_; ++i) 1410 { 1411 const struct ld_plugin_symbol* isym = &this->syms_[i]; 1412 const char* name = isym->name; 1413 const char* ver = isym->version; 1414 elfcpp::Elf_Half shndx; 1415 elfcpp::STB bind; 1416 elfcpp::STV vis; 1417 1418 if (name != NULL && name[0] == '\0') 1419 name = NULL; 1420 if (ver != NULL && ver[0] == '\0') 1421 ver = NULL; 1422 1423 switch (isym->def) 1424 { 1425 case LDPK_WEAKDEF: 1426 case LDPK_WEAKUNDEF: 1427 bind = elfcpp::STB_WEAK; 1428 break; 1429 case LDPK_DEF: 1430 case LDPK_UNDEF: 1431 case LDPK_COMMON: 1432 default: 1433 bind = elfcpp::STB_GLOBAL; 1434 break; 1435 } 1436 1437 switch (isym->def) 1438 { 1439 case LDPK_DEF: 1440 case LDPK_WEAKDEF: 1441 // We use an arbitrary section number for a defined symbol. 1442 shndx = 1; 1443 break; 1444 case LDPK_COMMON: 1445 shndx = elfcpp::SHN_COMMON; 1446 break; 1447 case LDPK_UNDEF: 1448 case LDPK_WEAKUNDEF: 1449 default: 1450 shndx = elfcpp::SHN_UNDEF; 1451 break; 1452 } 1453 1454 switch (isym->visibility) 1455 { 1456 case LDPV_PROTECTED: 1457 vis = elfcpp::STV_PROTECTED; 1458 break; 1459 case LDPV_INTERNAL: 1460 vis = elfcpp::STV_INTERNAL; 1461 break; 1462 case LDPV_HIDDEN: 1463 vis = elfcpp::STV_HIDDEN; 1464 break; 1465 case LDPV_DEFAULT: 1466 default: 1467 vis = elfcpp::STV_DEFAULT; 1468 break; 1469 } 1470 1471 if (isym->comdat_key != NULL 1472 && isym->comdat_key[0] != '\0' 1473 && !this->include_comdat_group(isym->comdat_key, layout)) 1474 shndx = elfcpp::SHN_UNDEF; 1475 1476 osym.put_st_name(0); 1477 osym.put_st_value(0); 1478 osym.put_st_size(0); 1479 osym.put_st_info(bind, elfcpp::STT_NOTYPE); 1480 osym.put_st_other(vis, 0); 1481 osym.put_st_shndx(shndx); 1482 1483 this->symbols_[i] = 1484 symtab->add_from_pluginobj<size, big_endian>(this, name, ver, &sym); 1485 } 1486 } 1487 1488 template<int size, bool big_endian> 1489 Archive::Should_include 1490 Sized_pluginobj<size, big_endian>::do_should_include_member( 1491 Symbol_table* symtab, 1492 Layout* layout, 1493 Read_symbols_data*, 1494 std::string* why) 1495 { 1496 char* tmpbuf = NULL; 1497 size_t tmpbuflen = 0; 1498 1499 for (int i = 0; i < this->nsyms_; ++i) 1500 { 1501 const struct ld_plugin_symbol& sym = this->syms_[i]; 1502 if (sym.def == LDPK_UNDEF || sym.def == LDPK_WEAKUNDEF) 1503 continue; 1504 const char* name = sym.name; 1505 Symbol* symbol; 1506 Archive::Should_include t = Archive::should_include_member(symtab, 1507 layout, 1508 name, 1509 &symbol, why, 1510 &tmpbuf, 1511 &tmpbuflen); 1512 if (t == Archive::SHOULD_INCLUDE_YES) 1513 { 1514 if (tmpbuf != NULL) 1515 free(tmpbuf); 1516 return t; 1517 } 1518 } 1519 if (tmpbuf != NULL) 1520 free(tmpbuf); 1521 return Archive::SHOULD_INCLUDE_UNKNOWN; 1522 } 1523 1524 // Iterate over global symbols, calling a visitor class V for each. 1525 1526 template<int size, bool big_endian> 1527 void 1528 Sized_pluginobj<size, big_endian>::do_for_all_global_symbols( 1529 Read_symbols_data*, 1530 Library_base::Symbol_visitor_base* v) 1531 { 1532 for (int i = 0; i < this->nsyms_; ++i) 1533 { 1534 const struct ld_plugin_symbol& sym = this->syms_[i]; 1535 if (sym.def != LDPK_UNDEF) 1536 v->visit(sym.name); 1537 } 1538 } 1539 1540 // Iterate over local symbols, calling a visitor class V for each GOT offset 1541 // associated with a local symbol. 1542 template<int size, bool big_endian> 1543 void 1544 Sized_pluginobj<size, big_endian>::do_for_all_local_got_entries( 1545 Got_offset_list::Visitor*) const 1546 { 1547 gold_unreachable(); 1548 } 1549 1550 // Get the size of a section. Not used for plugin objects. 1551 1552 template<int size, bool big_endian> 1553 uint64_t 1554 Sized_pluginobj<size, big_endian>::do_section_size(unsigned int) 1555 { 1556 gold_unreachable(); 1557 return 0; 1558 } 1559 1560 // Get the name of a section. Not used for plugin objects. 1561 1562 template<int size, bool big_endian> 1563 std::string 1564 Sized_pluginobj<size, big_endian>::do_section_name(unsigned int) const 1565 { 1566 gold_unreachable(); 1567 return std::string(); 1568 } 1569 1570 // Return a view of the contents of a section. Not used for plugin objects. 1571 1572 template<int size, bool big_endian> 1573 const unsigned char* 1574 Sized_pluginobj<size, big_endian>::do_section_contents( 1575 unsigned int, 1576 section_size_type*, 1577 bool) 1578 { 1579 gold_unreachable(); 1580 return NULL; 1581 } 1582 1583 // Return section flags. Not used for plugin objects. 1584 1585 template<int size, bool big_endian> 1586 uint64_t 1587 Sized_pluginobj<size, big_endian>::do_section_flags(unsigned int) 1588 { 1589 gold_unreachable(); 1590 return 0; 1591 } 1592 1593 // Return section entsize. Not used for plugin objects. 1594 1595 template<int size, bool big_endian> 1596 uint64_t 1597 Sized_pluginobj<size, big_endian>::do_section_entsize(unsigned int) 1598 { 1599 gold_unreachable(); 1600 return 0; 1601 } 1602 1603 // Return section address. Not used for plugin objects. 1604 1605 template<int size, bool big_endian> 1606 uint64_t 1607 Sized_pluginobj<size, big_endian>::do_section_address(unsigned int) 1608 { 1609 gold_unreachable(); 1610 return 0; 1611 } 1612 1613 // Return section type. Not used for plugin objects. 1614 1615 template<int size, bool big_endian> 1616 unsigned int 1617 Sized_pluginobj<size, big_endian>::do_section_type(unsigned int) 1618 { 1619 gold_unreachable(); 1620 return 0; 1621 } 1622 1623 // Return the section link field. Not used for plugin objects. 1624 1625 template<int size, bool big_endian> 1626 unsigned int 1627 Sized_pluginobj<size, big_endian>::do_section_link(unsigned int) 1628 { 1629 gold_unreachable(); 1630 return 0; 1631 } 1632 1633 // Return the section link field. Not used for plugin objects. 1634 1635 template<int size, bool big_endian> 1636 unsigned int 1637 Sized_pluginobj<size, big_endian>::do_section_info(unsigned int) 1638 { 1639 gold_unreachable(); 1640 return 0; 1641 } 1642 1643 // Return the section alignment. Not used for plugin objects. 1644 1645 template<int size, bool big_endian> 1646 uint64_t 1647 Sized_pluginobj<size, big_endian>::do_section_addralign(unsigned int) 1648 { 1649 gold_unreachable(); 1650 return 0; 1651 } 1652 1653 // Return the Xindex structure to use. Not used for plugin objects. 1654 1655 template<int size, bool big_endian> 1656 Xindex* 1657 Sized_pluginobj<size, big_endian>::do_initialize_xindex() 1658 { 1659 gold_unreachable(); 1660 return NULL; 1661 } 1662 1663 // Get symbol counts. Don't count plugin objects; the replacement 1664 // files will provide the counts. 1665 1666 template<int size, bool big_endian> 1667 void 1668 Sized_pluginobj<size, big_endian>::do_get_global_symbol_counts( 1669 const Symbol_table*, 1670 size_t* defined, 1671 size_t* used) const 1672 { 1673 *defined = 0; 1674 *used = 0; 1675 } 1676 1677 // Get symbols. Not used for plugin objects. 1678 1679 template<int size, bool big_endian> 1680 const Object::Symbols* 1681 Sized_pluginobj<size, big_endian>::do_get_global_symbols() const 1682 { 1683 gold_unreachable(); 1684 } 1685 1686 // Class Plugin_finish. This task runs after all replacement files have 1687 // been added. For now, it's a placeholder for a possible plugin API 1688 // to allow the plugin to release most of its resources. The cleanup 1689 // handlers must be called later, because they can remove the temporary 1690 // object files that are needed until the end of the link. 1691 1692 class Plugin_finish : public Task 1693 { 1694 public: 1695 Plugin_finish(Task_token* this_blocker, Task_token* next_blocker) 1696 : this_blocker_(this_blocker), next_blocker_(next_blocker) 1697 { } 1698 1699 ~Plugin_finish() 1700 { 1701 if (this->this_blocker_ != NULL) 1702 delete this->this_blocker_; 1703 } 1704 1705 Task_token* 1706 is_runnable() 1707 { 1708 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) 1709 return this->this_blocker_; 1710 return NULL; 1711 } 1712 1713 void 1714 locks(Task_locker* tl) 1715 { tl->add(this, this->next_blocker_); } 1716 1717 void 1718 run(Workqueue*) 1719 { 1720 Plugin_manager* plugins = parameters->options().plugins(); 1721 gold_assert(plugins != NULL); 1722 // We could call early cleanup handlers here. 1723 if (plugins->recorder()) 1724 plugins->recorder()->finish(); 1725 } 1726 1727 std::string 1728 get_name() const 1729 { return "Plugin_finish"; } 1730 1731 private: 1732 Task_token* this_blocker_; 1733 Task_token* next_blocker_; 1734 }; 1735 1736 // Class Plugin_hook. 1737 1738 Plugin_hook::~Plugin_hook() 1739 { 1740 } 1741 1742 // Return whether a Plugin_hook task is runnable. 1743 1744 Task_token* 1745 Plugin_hook::is_runnable() 1746 { 1747 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) 1748 return this->this_blocker_; 1749 return NULL; 1750 } 1751 1752 // Return a Task_locker for a Plugin_hook task. We don't need any 1753 // locks here. 1754 1755 void 1756 Plugin_hook::locks(Task_locker*) 1757 { 1758 } 1759 1760 // Run the "all symbols read" plugin hook. 1761 1762 void 1763 Plugin_hook::run(Workqueue* workqueue) 1764 { 1765 gold_assert(this->options_.has_plugins()); 1766 Symbol* start_sym = this->symtab_->lookup(parameters->entry()); 1767 if (start_sym != NULL) 1768 start_sym->set_in_real_elf(); 1769 1770 this->options_.plugins()->all_symbols_read(workqueue, 1771 this, 1772 this->input_objects_, 1773 this->symtab_, 1774 this->dirpath_, 1775 this->mapfile_, 1776 &this->this_blocker_); 1777 workqueue->queue_soon(new Plugin_finish(this->this_blocker_, 1778 this->next_blocker_)); 1779 } 1780 1781 // The C interface routines called by the plugins. 1782 1783 #ifdef ENABLE_PLUGINS 1784 1785 // Register a claim-file handler. 1786 1787 static enum ld_plugin_status 1788 register_claim_file(ld_plugin_claim_file_handler handler) 1789 { 1790 gold_assert(parameters->options().has_plugins()); 1791 parameters->options().plugins()->set_claim_file_handler(handler); 1792 return LDPS_OK; 1793 } 1794 1795 // Register an all-symbols-read handler. 1796 1797 static enum ld_plugin_status 1798 register_all_symbols_read(ld_plugin_all_symbols_read_handler handler) 1799 { 1800 gold_assert(parameters->options().has_plugins()); 1801 parameters->options().plugins()->set_all_symbols_read_handler(handler); 1802 return LDPS_OK; 1803 } 1804 1805 // Register a cleanup handler. 1806 1807 static enum ld_plugin_status 1808 register_cleanup(ld_plugin_cleanup_handler handler) 1809 { 1810 gold_assert(parameters->options().has_plugins()); 1811 parameters->options().plugins()->set_cleanup_handler(handler); 1812 return LDPS_OK; 1813 } 1814 1815 // Add symbols from a plugin-claimed input file. 1816 1817 static enum ld_plugin_status 1818 add_symbols(void* handle, int nsyms, const ld_plugin_symbol* syms) 1819 { 1820 gold_assert(parameters->options().has_plugins()); 1821 Pluginobj* obj = parameters->options().plugins()->make_plugin_object( 1822 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); 1823 if (obj == NULL) 1824 return LDPS_ERR; 1825 obj->store_incoming_symbols(nsyms, syms); 1826 return LDPS_OK; 1827 } 1828 1829 // Get the input file information with an open (possibly re-opened) 1830 // file descriptor. 1831 1832 static enum ld_plugin_status 1833 get_input_file(const void* handle, struct ld_plugin_input_file* file) 1834 { 1835 gold_assert(parameters->options().has_plugins()); 1836 unsigned int obj_index = 1837 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); 1838 return parameters->options().plugins()->get_input_file(obj_index, file); 1839 } 1840 1841 // Release the input file. 1842 1843 static enum ld_plugin_status 1844 release_input_file(const void* handle) 1845 { 1846 gold_assert(parameters->options().has_plugins()); 1847 unsigned int obj_index = 1848 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); 1849 return parameters->options().plugins()->release_input_file(obj_index); 1850 } 1851 1852 static enum ld_plugin_status 1853 get_view(const void *handle, const void **viewp) 1854 { 1855 gold_assert(parameters->options().has_plugins()); 1856 unsigned int obj_index = 1857 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); 1858 return parameters->options().plugins()->get_view(obj_index, viewp); 1859 } 1860 1861 // Get the symbol resolution info for a plugin-claimed input file. 1862 1863 static enum ld_plugin_status 1864 get_symbols(const void* handle, int nsyms, ld_plugin_symbol* syms) 1865 { 1866 gold_assert(parameters->options().has_plugins()); 1867 Plugin_manager* plugins = parameters->options().plugins(); 1868 Object* obj = plugins->object( 1869 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); 1870 if (obj == NULL) 1871 return LDPS_ERR; 1872 Pluginobj* plugin_obj = obj->pluginobj(); 1873 if (plugin_obj == NULL) 1874 return LDPS_ERR; 1875 Symbol_table* symtab = plugins->symtab(); 1876 return plugin_obj->get_symbol_resolution_info(symtab, nsyms, syms, 1); 1877 } 1878 1879 // Version 2 of the above. The only difference is that this version 1880 // is allowed to return the resolution code LDPR_PREVAILING_DEF_IRONLY_EXP. 1881 1882 static enum ld_plugin_status 1883 get_symbols_v2(const void* handle, int nsyms, ld_plugin_symbol* syms) 1884 { 1885 gold_assert(parameters->options().has_plugins()); 1886 Plugin_manager* plugins = parameters->options().plugins(); 1887 Object* obj = plugins->object( 1888 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); 1889 if (obj == NULL) 1890 return LDPS_ERR; 1891 Pluginobj* plugin_obj = obj->pluginobj(); 1892 if (plugin_obj == NULL) 1893 return LDPS_ERR; 1894 Symbol_table* symtab = plugins->symtab(); 1895 return plugin_obj->get_symbol_resolution_info(symtab, nsyms, syms, 2); 1896 } 1897 1898 // Version 3 of the above. The only difference from v2 is that it 1899 // returns LDPS_NO_SYMS instead of LDPS_OK for the objects we never 1900 // decided to include. 1901 1902 static enum ld_plugin_status 1903 get_symbols_v3(const void* handle, int nsyms, ld_plugin_symbol* syms) 1904 { 1905 gold_assert(parameters->options().has_plugins()); 1906 Plugin_manager* plugins = parameters->options().plugins(); 1907 Object* obj = plugins->object( 1908 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); 1909 if (obj == NULL) 1910 return LDPS_ERR; 1911 Pluginobj* plugin_obj = obj->pluginobj(); 1912 if (plugin_obj == NULL) 1913 return LDPS_ERR; 1914 Symbol_table* symtab = plugins->symtab(); 1915 return plugin_obj->get_symbol_resolution_info(symtab, nsyms, syms, 3); 1916 } 1917 1918 // Add a new (real) input file generated by a plugin. 1919 1920 static enum ld_plugin_status 1921 add_input_file(const char* pathname) 1922 { 1923 gold_assert(parameters->options().has_plugins()); 1924 return parameters->options().plugins()->add_input_file(pathname, false); 1925 } 1926 1927 // Add a new (real) library required by a plugin. 1928 1929 static enum ld_plugin_status 1930 add_input_library(const char* pathname) 1931 { 1932 gold_assert(parameters->options().has_plugins()); 1933 return parameters->options().plugins()->add_input_file(pathname, true); 1934 } 1935 1936 // Set the extra library path to be used by libraries added via 1937 // add_input_library 1938 1939 static enum ld_plugin_status 1940 set_extra_library_path(const char* path) 1941 { 1942 gold_assert(parameters->options().has_plugins()); 1943 return parameters->options().plugins()->set_extra_library_path(path); 1944 } 1945 1946 // Issue a diagnostic message from a plugin. 1947 1948 static enum ld_plugin_status 1949 message(int level, const char* format, ...) 1950 { 1951 va_list args; 1952 va_start(args, format); 1953 1954 switch (level) 1955 { 1956 case LDPL_INFO: 1957 parameters->errors()->info(format, args); 1958 break; 1959 case LDPL_WARNING: 1960 parameters->errors()->warning(format, args); 1961 break; 1962 case LDPL_ERROR: 1963 default: 1964 parameters->errors()->error(format, args); 1965 break; 1966 case LDPL_FATAL: 1967 parameters->errors()->fatal(format, args); 1968 break; 1969 } 1970 1971 va_end(args); 1972 return LDPS_OK; 1973 } 1974 1975 // Get the section count of the object corresponding to the handle. This 1976 // plugin interface can only be called in the claim_file handler of the plugin. 1977 1978 static enum ld_plugin_status 1979 get_input_section_count(const void* handle, unsigned int* count) 1980 { 1981 gold_assert(parameters->options().has_plugins()); 1982 1983 if (!parameters->options().plugins()->in_claim_file_handler()) 1984 return LDPS_ERR; 1985 1986 Object* obj = parameters->options().plugins()->get_elf_object(handle); 1987 1988 if (obj == NULL) 1989 return LDPS_ERR; 1990 1991 *count = obj->shnum(); 1992 return LDPS_OK; 1993 } 1994 1995 // Get the type of the specified section in the object corresponding 1996 // to the handle. This plugin interface can only be called in the 1997 // claim_file handler of the plugin. 1998 1999 static enum ld_plugin_status 2000 get_input_section_type(const struct ld_plugin_section section, 2001 unsigned int* type) 2002 { 2003 gold_assert(parameters->options().has_plugins()); 2004 2005 if (!parameters->options().plugins()->in_claim_file_handler()) 2006 return LDPS_ERR; 2007 2008 Object* obj 2009 = parameters->options().plugins()->get_elf_object(section.handle); 2010 2011 if (obj == NULL) 2012 return LDPS_BAD_HANDLE; 2013 2014 *type = obj->section_type(section.shndx); 2015 return LDPS_OK; 2016 } 2017 2018 // Get the name of the specified section in the object corresponding 2019 // to the handle. This plugin interface can only be called in the 2020 // claim_file handler of the plugin. 2021 2022 static enum ld_plugin_status 2023 get_input_section_name(const struct ld_plugin_section section, 2024 char** section_name_ptr) 2025 { 2026 gold_assert(parameters->options().has_plugins()); 2027 2028 if (!parameters->options().plugins()->in_claim_file_handler()) 2029 return LDPS_ERR; 2030 2031 Object* obj 2032 = parameters->options().plugins()->get_elf_object(section.handle); 2033 2034 if (obj == NULL) 2035 return LDPS_BAD_HANDLE; 2036 2037 // Check if the object is locked before getting the section name. 2038 gold_assert(obj->is_locked()); 2039 2040 const std::string section_name = obj->section_name(section.shndx); 2041 *section_name_ptr = static_cast<char*>(malloc(section_name.length() + 1)); 2042 memcpy(*section_name_ptr, section_name.c_str(), section_name.length() + 1); 2043 return LDPS_OK; 2044 } 2045 2046 // Get the contents of the specified section in the object corresponding 2047 // to the handle. This plugin interface can only be called in the 2048 // claim_file handler of the plugin. 2049 2050 static enum ld_plugin_status 2051 get_input_section_contents(const struct ld_plugin_section section, 2052 const unsigned char** section_contents_ptr, 2053 size_t* len) 2054 { 2055 gold_assert(parameters->options().has_plugins()); 2056 2057 if (!parameters->options().plugins()->in_claim_file_handler()) 2058 return LDPS_ERR; 2059 2060 Object* obj 2061 = parameters->options().plugins()->get_elf_object(section.handle); 2062 2063 if (obj == NULL) 2064 return LDPS_BAD_HANDLE; 2065 2066 // Check if the object is locked before getting the section contents. 2067 gold_assert(obj->is_locked()); 2068 2069 section_size_type plen; 2070 *section_contents_ptr 2071 = obj->section_contents(section.shndx, &plen, false); 2072 *len = plen; 2073 return LDPS_OK; 2074 } 2075 2076 // Get the alignment of the specified section in the object corresponding 2077 // to the handle. This plugin interface can only be called in the 2078 // claim_file handler of the plugin. 2079 2080 static enum ld_plugin_status 2081 get_input_section_alignment(const struct ld_plugin_section section, 2082 unsigned int* addralign) 2083 { 2084 gold_assert(parameters->options().has_plugins()); 2085 2086 if (!parameters->options().plugins()->in_claim_file_handler()) 2087 return LDPS_ERR; 2088 2089 Object* obj 2090 = parameters->options().plugins()->get_elf_object(section.handle); 2091 2092 if (obj == NULL) 2093 return LDPS_BAD_HANDLE; 2094 2095 *addralign = obj->section_addralign(section.shndx); 2096 return LDPS_OK; 2097 } 2098 2099 // Get the size of the specified section in the object corresponding 2100 // to the handle. This plugin interface can only be called in the 2101 // claim_file handler of the plugin. 2102 2103 static enum ld_plugin_status 2104 get_input_section_size(const struct ld_plugin_section section, 2105 uint64_t* secsize) 2106 { 2107 gold_assert(parameters->options().has_plugins()); 2108 2109 if (!parameters->options().plugins()->in_claim_file_handler()) 2110 return LDPS_ERR; 2111 2112 Object* obj 2113 = parameters->options().plugins()->get_elf_object(section.handle); 2114 2115 if (obj == NULL) 2116 return LDPS_BAD_HANDLE; 2117 2118 *secsize = obj->section_size(section.shndx); 2119 return LDPS_OK; 2120 } 2121 2122 static enum ld_plugin_status 2123 get_wrap_symbols(uint64_t *count, const char ***wrap_symbols) 2124 { 2125 gold_assert(parameters->options().has_plugins()); 2126 *count = parameters->options().wrap_size(); 2127 2128 if (*count == 0) 2129 return LDPS_OK; 2130 2131 *wrap_symbols = new const char *[*count]; 2132 int i = 0; 2133 for (options::String_set::const_iterator 2134 it = parameters->options().wrap_begin(); 2135 it != parameters->options().wrap_end(); ++it, ++i) { 2136 (*wrap_symbols)[i] = it->c_str(); 2137 } 2138 return LDPS_OK; 2139 } 2140 2141 2142 // Specify the ordering of sections in the final layout. The sections are 2143 // specified as (handle,shndx) pairs in the two arrays in the order in 2144 // which they should appear in the final layout. 2145 2146 static enum ld_plugin_status 2147 update_section_order(const struct ld_plugin_section* section_list, 2148 unsigned int num_sections) 2149 { 2150 gold_assert(parameters->options().has_plugins()); 2151 2152 if (num_sections == 0) 2153 return LDPS_OK; 2154 2155 if (section_list == NULL) 2156 return LDPS_ERR; 2157 2158 Layout* layout = parameters->options().plugins()->layout(); 2159 gold_assert (layout != NULL); 2160 2161 std::map<Section_id, unsigned int>* order_map 2162 = layout->get_section_order_map(); 2163 2164 /* Store the mapping from Section_id to section position in layout's 2165 order_map to consult after output sections are added. */ 2166 for (unsigned int i = 0; i < num_sections; ++i) 2167 { 2168 Object* obj = parameters->options().plugins()->get_elf_object( 2169 section_list[i].handle); 2170 if (obj == NULL || obj->is_dynamic()) 2171 return LDPS_BAD_HANDLE; 2172 unsigned int shndx = section_list[i].shndx; 2173 Section_id secn_id(static_cast<Relobj*>(obj), shndx); 2174 (*order_map)[secn_id] = i + 1; 2175 } 2176 2177 return LDPS_OK; 2178 } 2179 2180 // Let the linker know that the sections could be reordered. 2181 2182 static enum ld_plugin_status 2183 allow_section_ordering() 2184 { 2185 gold_assert(parameters->options().has_plugins()); 2186 Layout* layout = parameters->options().plugins()->layout(); 2187 layout->set_section_ordering_specified(); 2188 return LDPS_OK; 2189 } 2190 2191 // Let the linker know that a subset of sections could be mapped 2192 // to a unique segment. 2193 2194 static enum ld_plugin_status 2195 allow_unique_segment_for_sections() 2196 { 2197 gold_assert(parameters->options().has_plugins()); 2198 Layout* layout = parameters->options().plugins()->layout(); 2199 layout->set_unique_segment_for_sections_specified(); 2200 return LDPS_OK; 2201 } 2202 2203 // This function should map the list of sections specified in the 2204 // SECTION_LIST to a unique segment. ELF segments do not have names 2205 // and the NAME is used to identify Output Section which should contain 2206 // the list of sections. This Output Section will then be mapped to 2207 // a unique segment. FLAGS is used to specify if any additional segment 2208 // flags need to be set. For instance, a specific segment flag can be 2209 // set to identify this segment. Unsetting segment flags is not possible. 2210 // ALIGN specifies the alignment of the segment. 2211 2212 static enum ld_plugin_status 2213 unique_segment_for_sections(const char* segment_name, 2214 uint64_t flags, 2215 uint64_t align, 2216 const struct ld_plugin_section* section_list, 2217 unsigned int num_sections) 2218 { 2219 gold_assert(parameters->options().has_plugins()); 2220 2221 if (num_sections == 0) 2222 return LDPS_OK; 2223 2224 if (section_list == NULL) 2225 return LDPS_ERR; 2226 2227 Layout* layout = parameters->options().plugins()->layout(); 2228 gold_assert (layout != NULL); 2229 2230 Layout::Unique_segment_info* s = new Layout::Unique_segment_info; 2231 s->name = segment_name; 2232 s->flags = flags; 2233 s->align = align; 2234 2235 for (unsigned int i = 0; i < num_sections; ++i) 2236 { 2237 Object* obj = parameters->options().plugins()->get_elf_object( 2238 section_list[i].handle); 2239 if (obj == NULL || obj->is_dynamic()) 2240 return LDPS_BAD_HANDLE; 2241 unsigned int shndx = section_list[i].shndx; 2242 Const_section_id secn_id(static_cast<Relobj*>(obj), shndx); 2243 layout->insert_section_segment_map(secn_id, s); 2244 } 2245 2246 return LDPS_OK; 2247 } 2248 2249 // Register a new_input handler. 2250 2251 static enum ld_plugin_status 2252 register_new_input(ld_plugin_new_input_handler handler) 2253 { 2254 gold_assert(parameters->options().has_plugins()); 2255 parameters->options().plugins()->set_new_input_handler(handler); 2256 return LDPS_OK; 2257 } 2258 2259 #endif // ENABLE_PLUGINS 2260 2261 // Allocate a Pluginobj object of the appropriate size and endianness. 2262 2263 static Pluginobj* 2264 make_sized_plugin_object(const std::string& filename, 2265 Input_file* input_file, off_t offset, off_t filesize) 2266 { 2267 Pluginobj* obj = NULL; 2268 2269 parameters_force_valid_target(); 2270 const Target& target(parameters->target()); 2271 2272 if (target.get_size() == 32) 2273 { 2274 if (target.is_big_endian()) 2275 #ifdef HAVE_TARGET_32_BIG 2276 obj = new Sized_pluginobj<32, true>(filename, input_file, 2277 offset, filesize); 2278 #else 2279 gold_error(_("%s: not configured to support " 2280 "32-bit big-endian object"), 2281 filename.c_str()); 2282 #endif 2283 else 2284 #ifdef HAVE_TARGET_32_LITTLE 2285 obj = new Sized_pluginobj<32, false>(filename, input_file, 2286 offset, filesize); 2287 #else 2288 gold_error(_("%s: not configured to support " 2289 "32-bit little-endian object"), 2290 filename.c_str()); 2291 #endif 2292 } 2293 else if (target.get_size() == 64) 2294 { 2295 if (target.is_big_endian()) 2296 #ifdef HAVE_TARGET_64_BIG 2297 obj = new Sized_pluginobj<64, true>(filename, input_file, 2298 offset, filesize); 2299 #else 2300 gold_error(_("%s: not configured to support " 2301 "64-bit big-endian object"), 2302 filename.c_str()); 2303 #endif 2304 else 2305 #ifdef HAVE_TARGET_64_LITTLE 2306 obj = new Sized_pluginobj<64, false>(filename, input_file, 2307 offset, filesize); 2308 #else 2309 gold_error(_("%s: not configured to support " 2310 "64-bit little-endian object"), 2311 filename.c_str()); 2312 #endif 2313 } 2314 2315 gold_assert(obj != NULL); 2316 return obj; 2317 } 2318 2319 } // End namespace gold. 2320