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. */ 47static void * 48dlopen(const char *file, int mode ATTRIBUTE_UNUSED) 49{ 50 return LoadLibrary(file); 51} 52 53static void * 54dlsym(void *handle, const char *name) 55{ 56 return reinterpret_cast<void *>( 57 GetProcAddress(static_cast<HMODULE>(handle),name)); 58} 59 60static const char * 61dlerror(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 82namespace gold 83{ 84 85#ifdef ENABLE_PLUGINS 86 87// The linker's exported interfaces. 88 89extern "C" 90{ 91 92static enum ld_plugin_status 93register_claim_file(ld_plugin_claim_file_handler handler); 94 95static enum ld_plugin_status 96register_all_symbols_read(ld_plugin_all_symbols_read_handler handler); 97 98static enum ld_plugin_status 99register_cleanup(ld_plugin_cleanup_handler handler); 100 101static enum ld_plugin_status 102add_symbols(void *handle, int nsyms, const struct ld_plugin_symbol *syms); 103 104static enum ld_plugin_status 105get_input_file(const void *handle, struct ld_plugin_input_file *file); 106 107static enum ld_plugin_status 108get_view(const void *handle, const void **viewp); 109 110static enum ld_plugin_status 111release_input_file(const void *handle); 112 113static enum ld_plugin_status 114get_symbols(const void *handle, int nsyms, struct ld_plugin_symbol *syms); 115 116static enum ld_plugin_status 117get_symbols_v2(const void *handle, int nsyms, struct ld_plugin_symbol *syms); 118 119static enum ld_plugin_status 120get_symbols_v3(const void *handle, int nsyms, struct ld_plugin_symbol *syms); 121 122static enum ld_plugin_status 123add_input_file(const char *pathname); 124 125static enum ld_plugin_status 126add_input_library(const char *pathname); 127 128static enum ld_plugin_status 129set_extra_library_path(const char *path); 130 131static enum ld_plugin_status 132message(int level, const char *format, ...); 133 134static enum ld_plugin_status 135get_input_section_count(const void* handle, unsigned int* count); 136 137static enum ld_plugin_status 138get_input_section_type(const struct ld_plugin_section section, 139 unsigned int* type); 140 141static enum ld_plugin_status 142get_input_section_name(const struct ld_plugin_section section, 143 char** section_name_ptr); 144 145static enum ld_plugin_status 146get_input_section_contents(const struct ld_plugin_section section, 147 const unsigned char** section_contents, 148 size_t* len); 149 150static enum ld_plugin_status 151update_section_order(const struct ld_plugin_section *section_list, 152 unsigned int num_sections); 153 154static enum ld_plugin_status 155allow_section_ordering(); 156 157static enum ld_plugin_status 158allow_unique_segment_for_sections(); 159 160static enum ld_plugin_status 161unique_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 167static enum ld_plugin_status 168get_input_section_alignment(const struct ld_plugin_section section, 169 unsigned int* addralign); 170 171static enum ld_plugin_status 172get_input_section_size(const struct ld_plugin_section section, 173 uint64_t* secsize); 174 175static enum ld_plugin_status 176register_new_input(ld_plugin_new_input_handler handler); 177 178static enum ld_plugin_status 179get_wrap_symbols(uint64_t *num_symbols, const char ***wrap_symbol_list); 180 181}; 182 183#endif // ENABLE_PLUGINS 184 185static 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 193void 194Plugin::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 383inline bool 384Plugin::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 399inline void 400Plugin::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 408inline void 409Plugin::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 417inline void 418Plugin::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 432class 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 472class 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 505bool 506Plugin_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 545void 546Plugin_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 558void 559Plugin_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 572static bool 573link_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 610void 611Plugin_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 633void 634Plugin_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 701Plugin_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 719void 720Plugin_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 738Pluginobj* 739Plugin_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 810void 811Plugin_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 821void 822Plugin_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 832void 833Plugin_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 873void 874Plugin_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 884void 885Plugin_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 979bool 980Plugin_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 1000void 1001Plugin_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 1020void 1021Plugin_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 1040Pluginobj* 1041Plugin_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 1073ld_plugin_status 1074Plugin_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 1092ld_plugin_status 1093Plugin_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 1110Object* 1111Plugin_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 1124ld_plugin_status 1125Plugin_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 1157ld_plugin_status 1158Plugin_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 1166ld_plugin_status 1167Plugin_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 1206Pluginobj::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 1218static inline bool 1219is_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 1233static inline bool 1234is_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 1247ld_plugin_status 1248Pluginobj::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 1343bool 1344Pluginobj::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 1361template<int size, bool big_endian> 1362Sized_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 1373template<int size, bool big_endian> 1374void 1375Sized_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 1382template<int size, bool big_endian> 1383void 1384Sized_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 1392template<int size, bool big_endian> 1393void 1394Sized_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 1488template<int size, bool big_endian> 1489Archive::Should_include 1490Sized_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 1526template<int size, bool big_endian> 1527void 1528Sized_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. 1542template<int size, bool big_endian> 1543void 1544Sized_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 1552template<int size, bool big_endian> 1553uint64_t 1554Sized_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 1562template<int size, bool big_endian> 1563std::string 1564Sized_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 1572template<int size, bool big_endian> 1573const unsigned char* 1574Sized_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 1585template<int size, bool big_endian> 1586uint64_t 1587Sized_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 1595template<int size, bool big_endian> 1596uint64_t 1597Sized_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 1605template<int size, bool big_endian> 1606uint64_t 1607Sized_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 1615template<int size, bool big_endian> 1616unsigned int 1617Sized_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 1625template<int size, bool big_endian> 1626unsigned int 1627Sized_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 1635template<int size, bool big_endian> 1636unsigned int 1637Sized_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 1645template<int size, bool big_endian> 1646uint64_t 1647Sized_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 1655template<int size, bool big_endian> 1656Xindex* 1657Sized_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 1666template<int size, bool big_endian> 1667void 1668Sized_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 1679template<int size, bool big_endian> 1680const Object::Symbols* 1681Sized_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 1692class 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 1738Plugin_hook::~Plugin_hook() 1739{ 1740} 1741 1742// Return whether a Plugin_hook task is runnable. 1743 1744Task_token* 1745Plugin_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 1755void 1756Plugin_hook::locks(Task_locker*) 1757{ 1758} 1759 1760// Run the "all symbols read" plugin hook. 1761 1762void 1763Plugin_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 1787static enum ld_plugin_status 1788register_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 1797static enum ld_plugin_status 1798register_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 1807static enum ld_plugin_status 1808register_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 1817static enum ld_plugin_status 1818add_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 1832static enum ld_plugin_status 1833get_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 1843static enum ld_plugin_status 1844release_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 1852static enum ld_plugin_status 1853get_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 1863static enum ld_plugin_status 1864get_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 1882static enum ld_plugin_status 1883get_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 1902static enum ld_plugin_status 1903get_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 1920static enum ld_plugin_status 1921add_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 1929static enum ld_plugin_status 1930add_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 1939static enum ld_plugin_status 1940set_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 1948static enum ld_plugin_status 1949message(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 1978static enum ld_plugin_status 1979get_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 1999static enum ld_plugin_status 2000get_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 2022static enum ld_plugin_status 2023get_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 2050static enum ld_plugin_status 2051get_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 2080static enum ld_plugin_status 2081get_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 2103static enum ld_plugin_status 2104get_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 2122static enum ld_plugin_status 2123get_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 2146static enum ld_plugin_status 2147update_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 2182static enum ld_plugin_status 2183allow_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 2194static enum ld_plugin_status 2195allow_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 2212static enum ld_plugin_status 2213unique_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 2251static enum ld_plugin_status 2252register_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 2263static Pluginobj* 2264make_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