1 // plugin.cc -- plugin manager for gold -*- C++ -*-
3 // Copyright (C) 2008-2018 Free Software Foundation, Inc.
4 // Written by Cary Coutant <ccoutant@google.com>.
6 // This file is part of gold.
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.
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.
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.
33 #include "libiberty.h"
38 #elif defined (HAVE_WINDOWS_H)
41 #error Unknown how to handle dynamic-load-libraries.
44 #if !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H)
46 #define RTLD_NOW 0 /* Dummy value. */
48 dlopen(const char *file, int mode ATTRIBUTE_UNUSED)
50 return LoadLibrary(file);
54 dlsym(void *handle, const char *name)
56 return reinterpret_cast<void *>(
57 GetProcAddress(static_cast<HMODULE>(handle),name));
63 return "unable to load dll";
66 #endif /* !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) */
67 #endif /* ENABLE_PLUGINS */
69 #include "parameters.h"
79 #include "descriptors.h"
87 // The linker's exported interfaces.
92 static enum ld_plugin_status
93 register_claim_file(ld_plugin_claim_file_handler handler);
95 static enum ld_plugin_status
96 register_all_symbols_read(ld_plugin_all_symbols_read_handler handler);
98 static enum ld_plugin_status
99 register_cleanup(ld_plugin_cleanup_handler handler);
101 static enum ld_plugin_status
102 add_symbols(void *handle, int nsyms, const struct ld_plugin_symbol *syms);
104 static enum ld_plugin_status
105 get_input_file(const void *handle, struct ld_plugin_input_file *file);
107 static enum ld_plugin_status
108 get_view(const void *handle, const void **viewp);
110 static enum ld_plugin_status
111 release_input_file(const void *handle);
113 static enum ld_plugin_status
114 get_symbols(const void *handle, int nsyms, struct ld_plugin_symbol *syms);
116 static enum ld_plugin_status
117 get_symbols_v2(const void *handle, int nsyms, struct ld_plugin_symbol *syms);
119 static enum ld_plugin_status
120 get_symbols_v3(const void *handle, int nsyms, struct ld_plugin_symbol *syms);
122 static enum ld_plugin_status
123 add_input_file(const char *pathname);
125 static enum ld_plugin_status
126 add_input_library(const char *pathname);
128 static enum ld_plugin_status
129 set_extra_library_path(const char *path);
131 static enum ld_plugin_status
132 message(int level, const char *format, ...);
134 static enum ld_plugin_status
135 get_input_section_count(const void* handle, unsigned int* count);
137 static enum ld_plugin_status
138 get_input_section_type(const struct ld_plugin_section section,
141 static enum ld_plugin_status
142 get_input_section_name(const struct ld_plugin_section section,
143 char** section_name_ptr);
145 static enum ld_plugin_status
146 get_input_section_contents(const struct ld_plugin_section section,
147 const unsigned char** section_contents,
150 static enum ld_plugin_status
151 update_section_order(const struct ld_plugin_section *section_list,
152 unsigned int num_sections);
154 static enum ld_plugin_status
155 allow_section_ordering();
157 static enum ld_plugin_status
158 allow_unique_segment_for_sections();
160 static enum ld_plugin_status
161 unique_segment_for_sections(const char* segment_name,
164 const struct ld_plugin_section *section_list,
165 unsigned int num_sections);
167 static enum ld_plugin_status
168 get_input_section_alignment(const struct ld_plugin_section section,
169 unsigned int* addralign);
171 static enum ld_plugin_status
172 get_input_section_size(const struct ld_plugin_section section,
175 static enum ld_plugin_status
176 register_new_input(ld_plugin_new_input_handler handler);
178 static enum ld_plugin_status
179 get_wrap_symbols(uint64_t *num_symbols, const char ***wrap_symbol_list);
183 #endif // ENABLE_PLUGINS
185 static Pluginobj* make_sized_plugin_object(const std::string& filename,
186 Input_file* input_file,
187 off_t offset, off_t filesize);
191 // Load one plugin library.
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)
202 gold_error(_("%s: could not load plugin library: %s"),
203 this->filename_.c_str(), dlerror());
207 // Find the plugin's onload entry point.
208 void* ptr = dlsym(this->handle_, "onload");
211 gold_error(_("%s: could not find onload entry point"),
212 this->filename_.c_str());
215 ld_plugin_onload onload;
216 gold_assert(sizeof(onload) == sizeof(ptr));
217 memcpy(&onload, &ptr, sizeof(ptr));
219 // Get the linker's version number.
220 const char* ver = get_version_string();
223 sscanf(ver, "%d.%d", &major, &minor);
225 // Allocate and populate a transfer vector.
226 const int tv_fixed_size = 31;
228 int tv_size = this->args_.size() + tv_fixed_size;
229 ld_plugin_tv* tv = new ld_plugin_tv[tv_size];
231 // Put LDPT_MESSAGE at the front of the list so the plugin can use it
232 // while processing subsequent entries.
234 tv[i].tv_tag = LDPT_MESSAGE;
235 tv[i].tv_u.tv_message = message;
238 tv[i].tv_tag = LDPT_API_VERSION;
239 tv[i].tv_u.tv_val = LD_PLUGIN_API_VERSION;
242 tv[i].tv_tag = LDPT_GOLD_VERSION;
243 tv[i].tv_u.tv_val = major * 100 + minor;
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;
254 tv[i].tv_u.tv_val = LDPO_EXEC;
257 tv[i].tv_tag = LDPT_OUTPUT_NAME;
258 tv[i].tv_u.tv_string = parameters->options().output();
260 for (unsigned int j = 0; j < this->args_.size(); ++j)
263 tv[i].tv_tag = LDPT_OPTION;
264 tv[i].tv_u.tv_string = this->args_[j].c_str();
268 tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK;
269 tv[i].tv_u.tv_register_claim_file = register_claim_file;
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;
276 tv[i].tv_tag = LDPT_REGISTER_CLEANUP_HOOK;
277 tv[i].tv_u.tv_register_cleanup = register_cleanup;
280 tv[i].tv_tag = LDPT_ADD_SYMBOLS;
281 tv[i].tv_u.tv_add_symbols = add_symbols;
284 tv[i].tv_tag = LDPT_GET_INPUT_FILE;
285 tv[i].tv_u.tv_get_input_file = get_input_file;
288 tv[i].tv_tag = LDPT_GET_VIEW;
289 tv[i].tv_u.tv_get_view = get_view;
292 tv[i].tv_tag = LDPT_RELEASE_INPUT_FILE;
293 tv[i].tv_u.tv_release_input_file = release_input_file;
296 tv[i].tv_tag = LDPT_GET_SYMBOLS;
297 tv[i].tv_u.tv_get_symbols = get_symbols;
300 tv[i].tv_tag = LDPT_GET_SYMBOLS_V2;
301 tv[i].tv_u.tv_get_symbols = get_symbols_v2;
304 tv[i].tv_tag = LDPT_GET_SYMBOLS_V3;
305 tv[i].tv_u.tv_get_symbols = get_symbols_v3;
308 tv[i].tv_tag = LDPT_ADD_INPUT_FILE;
309 tv[i].tv_u.tv_add_input_file = add_input_file;
312 tv[i].tv_tag = LDPT_ADD_INPUT_LIBRARY;
313 tv[i].tv_u.tv_add_input_library = add_input_library;
316 tv[i].tv_tag = LDPT_SET_EXTRA_LIBRARY_PATH;
317 tv[i].tv_u.tv_set_extra_library_path = set_extra_library_path;
320 tv[i].tv_tag = LDPT_GET_INPUT_SECTION_COUNT;
321 tv[i].tv_u.tv_get_input_section_count = get_input_section_count;
324 tv[i].tv_tag = LDPT_GET_INPUT_SECTION_TYPE;
325 tv[i].tv_u.tv_get_input_section_type = get_input_section_type;
328 tv[i].tv_tag = LDPT_GET_INPUT_SECTION_NAME;
329 tv[i].tv_u.tv_get_input_section_name = get_input_section_name;
332 tv[i].tv_tag = LDPT_GET_INPUT_SECTION_CONTENTS;
333 tv[i].tv_u.tv_get_input_section_contents = get_input_section_contents;
336 tv[i].tv_tag = LDPT_UPDATE_SECTION_ORDER;
337 tv[i].tv_u.tv_update_section_order = update_section_order;
340 tv[i].tv_tag = LDPT_ALLOW_SECTION_ORDERING;
341 tv[i].tv_u.tv_allow_section_ordering = allow_section_ordering;
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;
349 tv[i].tv_tag = LDPT_UNIQUE_SEGMENT_FOR_SECTIONS;
350 tv[i].tv_u.tv_unique_segment_for_sections = unique_segment_for_sections;
353 tv[i].tv_tag = LDPT_GET_INPUT_SECTION_ALIGNMENT;
354 tv[i].tv_u.tv_get_input_section_alignment = get_input_section_alignment;
357 tv[i].tv_tag = LDPT_GET_INPUT_SECTION_SIZE;
358 tv[i].tv_u.tv_get_input_section_size = get_input_section_size;
361 tv[i].tv_tag = LDPT_REGISTER_NEW_INPUT_HOOK;
362 tv[i].tv_u.tv_register_new_input = register_new_input;
365 tv[i].tv_tag = LDPT_GET_WRAP_SYMBOLS;
366 tv[i].tv_u.tv_get_wrap_symbols = get_wrap_symbols;
369 tv[i].tv_tag = LDPT_NULL;
370 tv[i].tv_u.tv_val = 0;
372 gold_assert(i == tv_size - 1);
374 // Call the onload entry point.
378 #endif // ENABLE_PLUGINS
381 // Call the plugin claim-file handler.
384 Plugin::claim_file(struct ld_plugin_input_file* plugin_input_file)
388 if (this->claim_file_handler_ != NULL)
390 (*this->claim_file_handler_)(plugin_input_file, &claimed);
397 // Call the all-symbols-read handler.
400 Plugin::all_symbols_read()
402 if (this->all_symbols_read_handler_ != NULL)
403 (*this->all_symbols_read_handler_)();
406 // Call the new_input handler.
409 Plugin::new_input(struct ld_plugin_input_file* plugin_input_file)
411 if (this->new_input_handler_ != NULL)
412 (*this->new_input_handler_)(plugin_input_file);
415 // Call the cleanup handler.
420 if (this->cleanup_handler_ != NULL && !this->cleanup_done_)
422 // Set this flag before calling to prevent a recursive plunge
423 // in the event that a plugin's cleanup handler issues a
425 this->cleanup_done_ = true;
426 (*this->cleanup_handler_)();
430 // This task is used to rescan archives as needed.
432 class Plugin_rescan : public Task
435 Plugin_rescan(Task_token* this_blocker, Task_token* next_blocker)
436 : this_blocker_(this_blocker), next_blocker_(next_blocker)
441 delete this->this_blocker_;
447 if (this->this_blocker_->is_blocked())
448 return this->this_blocker_;
453 locks(Task_locker* tl)
454 { tl->add(this, this->next_blocker_); }
458 { parameters->options().plugins()->rescan(this); }
462 { return "Plugin_rescan"; }
465 Task_token* this_blocker_;
466 Task_token* next_blocker_;
469 // Plugin_recorder logs plugin actions and saves intermediate files
472 class Plugin_recorder
475 Plugin_recorder() : file_count_(0), tempdir_(NULL), logfile_(NULL)
482 claimed_file(const std::string& obj_name, off_t offset, off_t filesize,
483 const std::string& plugin_name);
486 unclaimed_file(const std::string& obj_name, off_t offset, off_t filesize);
489 replacement_file(const char* name, bool is_lib);
492 record_symbols(const Object* obj, int nsyms,
493 const struct ld_plugin_symbol* syms);
497 { ::fclose(this->logfile_); }
500 unsigned int file_count_;
501 const char* tempdir_;
506 Plugin_recorder::init()
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 if (mkdtemp(dir_template) == NULL)
514 size_t len = strlen(dir_template) + 1;
515 char* tempdir = new char[len];
516 strncpy(tempdir, dir_template, len);
518 // Create the log file.
519 std::string logname(tempdir);
520 logname.append("/log");
521 FILE* logfile = ::fopen(logname.c_str(), "w");
525 this->tempdir_ = tempdir;
526 this->logfile_ = logfile;
528 gold_info(_("%s: recording to %s"), program_name, this->tempdir_);
534 Plugin_recorder::claimed_file(const std::string& obj_name,
537 const std::string& plugin_name)
539 fprintf(this->logfile_, "PLUGIN: %s\n", plugin_name.c_str());
540 fprintf(this->logfile_, "CLAIMED: %s", obj_name.c_str());
542 fprintf(this->logfile_, " @%ld", static_cast<long>(offset));
543 fprintf(this->logfile_, " %ld\n", static_cast<long>(filesize));
547 Plugin_recorder::unclaimed_file(const std::string& obj_name,
551 fprintf(this->logfile_, "UNCLAIMED: %s", obj_name.c_str());
553 fprintf(this->logfile_, " @%ld", static_cast<long>(offset));
554 fprintf(this->logfile_, " %ld\n", static_cast<long>(filesize));
557 // Make a hard link to INNAME from OUTNAME, if possible.
558 // If not, copy the file.
561 link_or_copy_file(const char* inname, const char* outname)
563 static char buf[4096];
565 if (::link(inname, outname) == 0)
568 int in = ::open(inname, O_RDONLY);
571 gold_warning(_("%s: can't open (%s)"), inname, strerror(errno));
574 int out = ::open(outname, O_CREAT | O_TRUNC | O_WRONLY, 0600);
577 gold_warning(_("%s: can't create (%s)"), outname, strerror(errno));
582 while ((len = ::read(in, buf, sizeof(buf))) > 0)
584 if (::write(out, buf, len) != len)
586 gold_warning(_("%s: write error while making copy of file (%s)"),
587 inname, strerror(errno));
597 Plugin_recorder::replacement_file(const char* name, bool is_lib)
599 fprintf(this->logfile_, "REPLACEMENT: %s", name);
601 fprintf(this->logfile_, "(lib)");
605 const char* basename = lbasename(name);
606 snprintf(counter, sizeof(counter), "%05d", this->file_count_);
608 std::string outname(this->tempdir_);
610 outname.append(counter);
612 outname.append(basename);
613 if (link_or_copy_file(name, outname.c_str()))
614 fprintf(this->logfile_, " -> %s", outname.c_str());
616 fprintf(this->logfile_, "\n");
620 Plugin_recorder::record_symbols(const Object* obj, int nsyms,
621 const struct ld_plugin_symbol* syms)
623 fprintf(this->logfile_, "SYMBOLS: %d %s\n", nsyms, obj->name().c_str());
624 for (int i = 0; i < nsyms; ++i)
626 const struct ld_plugin_symbol* isym = &syms[i];
652 switch (isym->visibility)
671 fprintf(this->logfile_, " %5d: %-2s %c %s", i, def, vis, isym->name);
672 if (isym->version != NULL && isym->version[0] != '\0')
673 fprintf(this->logfile_, "@%s", isym->version);
674 if (isym->comdat_key != NULL && isym->comdat_key[0] != '\0')
676 if (strcmp(isym->name, isym->comdat_key) == 0)
677 fprintf(this->logfile_, " [comdat]");
679 fprintf(this->logfile_, " [comdat: %s]", isym->comdat_key);
681 fprintf(this->logfile_, "\n");
685 // Plugin_manager methods.
687 Plugin_manager::~Plugin_manager()
689 for (Plugin_list::iterator p = this->plugins_.begin();
690 p != this->plugins_.end();
693 this->plugins_.clear();
694 for (Object_list::iterator obj = this->objects_.begin();
695 obj != this->objects_.end();
698 this->objects_.clear();
700 delete this->recorder_;
703 // Load all plugin libraries.
706 Plugin_manager::load_plugins(Layout* layout)
708 this->layout_ = layout;
710 if (is_debugging_enabled(DEBUG_PLUGIN))
712 this->recorder_ = new Plugin_recorder();
713 this->recorder_->init();
716 for (this->current_ = this->plugins_.begin();
717 this->current_ != this->plugins_.end();
719 (*this->current_)->load();
722 // Call the plugin claim-file handlers in turn to see if any claim the file.
725 Plugin_manager::claim_file(Input_file* input_file, off_t offset,
726 off_t filesize, Object* elf_object)
728 bool lock_initialized = this->initialize_lock_.initialize();
730 gold_assert(lock_initialized);
731 Hold_lock hl(*this->lock_);
733 unsigned int handle = this->objects_.size();
734 this->input_file_ = input_file;
735 this->plugin_input_file_.name = input_file->filename().c_str();
736 this->plugin_input_file_.fd = input_file->file().descriptor();
737 this->plugin_input_file_.offset = offset;
738 this->plugin_input_file_.filesize = filesize;
739 this->plugin_input_file_.handle = reinterpret_cast<void*>(handle);
740 if (elf_object != NULL)
741 this->objects_.push_back(elf_object);
742 this->in_claim_file_handler_ = true;
744 for (this->current_ = this->plugins_.begin();
745 this->current_ != this->plugins_.end();
748 // If we aren't yet in replacement phase, allow plugins to claim input
749 // files, otherwise notify the plugin of the new input file, if needed.
750 if (!this->in_replacement_phase_)
752 if ((*this->current_)->claim_file(&this->plugin_input_file_))
754 this->any_claimed_ = true;
755 this->in_claim_file_handler_ = false;
757 if (this->recorder_ != NULL)
759 const std::string& objname = (elf_object == NULL
760 ? input_file->filename()
761 : elf_object->name());
762 this->recorder_->claimed_file(objname,
764 (*this->current_)->filename());
767 if (this->objects_.size() > handle
768 && this->objects_[handle]->pluginobj() != NULL)
769 return this->objects_[handle]->pluginobj();
771 // If the plugin claimed the file but did not call the
772 // add_symbols callback, we need to create the Pluginobj now.
773 Pluginobj* obj = this->make_plugin_object(handle);
779 (*this->current_)->new_input(&this->plugin_input_file_);
783 this->in_claim_file_handler_ = false;
785 if (this->recorder_ != NULL)
786 this->recorder_->unclaimed_file(input_file->filename(), offset, filesize);
791 // Save an archive. This is used so that a plugin can add a file
792 // which refers to a symbol which was not previously referenced. In
793 // that case we want to pretend that the symbol was referenced before,
794 // and pull in the archive object.
797 Plugin_manager::save_archive(Archive* archive)
799 if (this->in_replacement_phase_ || !this->any_claimed_)
802 this->rescannable_.push_back(Rescannable(archive));
805 // Save an Input_group. This is like save_archive.
808 Plugin_manager::save_input_group(Input_group* input_group)
810 if (this->in_replacement_phase_ || !this->any_claimed_)
813 this->rescannable_.push_back(Rescannable(input_group));
816 // Call the all-symbols-read handlers.
819 Plugin_manager::all_symbols_read(Workqueue* workqueue, Task* task,
820 Input_objects* input_objects,
821 Symbol_table* symtab,
822 Dirsearch* dirpath, Mapfile* mapfile,
823 Task_token** last_blocker)
825 this->in_replacement_phase_ = true;
826 this->workqueue_ = workqueue;
828 this->input_objects_ = input_objects;
829 this->symtab_ = symtab;
830 this->dirpath_ = dirpath;
831 this->mapfile_ = mapfile;
832 this->this_blocker_ = NULL;
834 // Set symbols used in defsym expressions as seen in real ELF.
835 Layout *layout = parameters->options().plugins()->layout();
836 layout->script_options()->set_defsym_uses_in_real_elf(symtab);
837 layout->script_options()->find_defsym_defs(this->defsym_defines_set_);
839 for (this->current_ = this->plugins_.begin();
840 this->current_ != this->plugins_.end();
842 (*this->current_)->all_symbols_read();
844 if (this->any_added_)
846 Task_token* next_blocker = new Task_token(true);
847 next_blocker->add_blocker();
848 workqueue->queue(new Plugin_rescan(this->this_blocker_, next_blocker));
849 this->this_blocker_ = next_blocker;
852 *last_blocker = this->this_blocker_;
855 // This is called when we see a new undefined symbol. If we are in
856 // the replacement phase, this means that we may need to rescan some
857 // archives we have previously seen.
860 Plugin_manager::new_undefined_symbol(Symbol* sym)
862 if (this->in_replacement_phase_)
863 this->undefined_symbols_.push_back(sym);
866 // Rescan archives as needed. This handles the case where a new
867 // object file added by a plugin has an undefined reference to some
868 // symbol defined in an archive.
871 Plugin_manager::rescan(Task* task)
873 size_t rescan_pos = 0;
874 size_t rescan_size = this->rescannable_.size();
875 while (!this->undefined_symbols_.empty())
877 if (rescan_pos >= rescan_size)
879 this->undefined_symbols_.clear();
883 Undefined_symbol_list undefs;
884 undefs.reserve(this->undefined_symbols_.size());
885 this->undefined_symbols_.swap(undefs);
887 size_t min_rescan_pos = rescan_size;
889 for (Undefined_symbol_list::const_iterator p = undefs.begin();
893 if (!(*p)->is_undefined())
896 this->undefined_symbols_.push_back(*p);
898 // Find the first rescan archive which defines this symbol,
899 // starting at the current rescan position. The rescan position
900 // exists so that given -la -lb -lc we don't look for undefined
901 // symbols in -lb back in -la, but instead get the definition
902 // from -lc. Don't bother to look past the current minimum
904 for (size_t i = rescan_pos; i < min_rescan_pos; ++i)
906 if (this->rescannable_defines(i, *p))
914 if (min_rescan_pos >= rescan_size)
916 // We didn't find any rescannable archives which define any
917 // undefined symbols.
921 const Rescannable& r(this->rescannable_[min_rescan_pos]);
924 Task_lock_obj<Archive> tl(task, r.u.archive);
925 r.u.archive->add_symbols(this->symtab_, this->layout_,
926 this->input_objects_, this->mapfile_);
930 size_t next_saw_undefined = this->symtab_->saw_undefined();
931 size_t saw_undefined;
934 saw_undefined = next_saw_undefined;
936 for (Input_group::const_iterator p = r.u.input_group->begin();
937 p != r.u.input_group->end();
940 Task_lock_obj<Archive> tl(task, *p);
942 (*p)->add_symbols(this->symtab_, this->layout_,
943 this->input_objects_, this->mapfile_);
946 next_saw_undefined = this->symtab_->saw_undefined();
948 while (saw_undefined != next_saw_undefined);
951 for (size_t i = rescan_pos; i < min_rescan_pos + 1; ++i)
953 if (this->rescannable_[i].is_archive)
954 delete this->rescannable_[i].u.archive;
956 delete this->rescannable_[i].u.input_group;
959 rescan_pos = min_rescan_pos + 1;
963 // Return whether the rescannable at index I defines SYM.
966 Plugin_manager::rescannable_defines(size_t i, Symbol* sym)
968 const Rescannable& r(this->rescannable_[i]);
970 return r.u.archive->defines_symbol(sym);
973 for (Input_group::const_iterator p = r.u.input_group->begin();
974 p != r.u.input_group->end();
977 if ((*p)->defines_symbol(sym))
984 // Layout deferred objects.
987 Plugin_manager::layout_deferred_objects()
989 Deferred_layout_list::iterator obj;
991 for (obj = this->deferred_layout_objects_.begin();
992 obj != this->deferred_layout_objects_.end();
995 // Lock the object so we can read from it. This is only called
996 // single-threaded from queue_middle_tasks, so it is OK to lock.
997 // Unfortunately we have no way to pass in a Task token.
998 const Task* dummy_task = reinterpret_cast<const Task*>(-1);
999 Task_lock_obj<Object> tl(dummy_task, *obj);
1000 (*obj)->layout_deferred_sections(this->layout_);
1004 // Call the cleanup handlers.
1007 Plugin_manager::cleanup()
1009 if (this->any_added_)
1011 // If any input files were added, close all the input files.
1012 // This is because the plugin may want to remove them, and on
1013 // Windows you are not allowed to remove an open file.
1014 close_all_descriptors();
1017 for (this->current_ = this->plugins_.begin();
1018 this->current_ != this->plugins_.end();
1020 (*this->current_)->cleanup();
1023 // Make a new Pluginobj object. This is called when the plugin calls
1024 // the add_symbols API.
1027 Plugin_manager::make_plugin_object(unsigned int handle)
1029 // Make sure we aren't asked to make an object for the same handle twice.
1030 if (this->objects_.size() != handle
1031 && this->objects_[handle]->pluginobj() != NULL)
1034 const std::string* filename = &this->input_file_->filename();
1036 // If the elf object for this file was pushed into the objects_ vector,
1037 // use its filename, then delete it to make room for the Pluginobj as
1038 // this file is claimed.
1039 if (this->objects_.size() != handle)
1041 filename = &this->objects_.back()->name();
1042 this->objects_.pop_back();
1045 Pluginobj* obj = make_sized_plugin_object(*filename,
1047 this->plugin_input_file_.offset,
1048 this->plugin_input_file_.filesize);
1052 this->objects_.push_back(obj);
1056 // Get the input file information with an open (possibly re-opened)
1060 Plugin_manager::get_input_file(unsigned int handle,
1061 struct ld_plugin_input_file* file)
1063 Pluginobj* obj = this->object(handle)->pluginobj();
1065 return LDPS_BAD_HANDLE;
1067 obj->lock(this->task_);
1068 file->name = obj->filename().c_str();
1069 file->fd = obj->descriptor();
1070 file->offset = obj->offset();
1071 file->filesize = obj->filesize();
1072 file->handle = reinterpret_cast<void*>(handle);
1076 // Release the input file.
1079 Plugin_manager::release_input_file(unsigned int handle)
1081 if (this->object(handle) == NULL)
1082 return LDPS_BAD_HANDLE;
1084 Pluginobj* obj = this->object(handle)->pluginobj();
1087 return LDPS_BAD_HANDLE;
1089 obj->unlock(this->task_);
1093 // Get the elf object corresponding to the handle. Return NULL if we
1094 // found a Pluginobj instead.
1097 Plugin_manager::get_elf_object(const void* handle)
1099 Object* obj = this->object(
1100 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)));
1102 // The object should not be a Pluginobj.
1104 || obj->pluginobj() != NULL)
1111 Plugin_manager::get_view(unsigned int handle, const void **viewp)
1115 Input_file *input_file;
1116 if (this->in_claim_file_handler_)
1118 // We are being called from the claim_file hook.
1119 const struct ld_plugin_input_file &f = this->plugin_input_file_;
1121 filesize = f.filesize;
1122 input_file = this->input_file_;
1126 // An already claimed file.
1127 if (this->object(handle) == NULL)
1128 return LDPS_BAD_HANDLE;
1129 Pluginobj* obj = this->object(handle)->pluginobj();
1131 return LDPS_BAD_HANDLE;
1132 offset = obj->offset();
1133 filesize = obj->filesize();
1134 input_file = obj->input_file();
1136 *viewp = (void*) input_file->file().get_view(offset, 0, filesize, false,
1141 // Add a new library path.
1144 Plugin_manager::set_extra_library_path(const char* path)
1146 this->extra_search_path_ = std::string(path);
1150 // Add a new input file.
1153 Plugin_manager::add_input_file(const char* pathname, bool is_lib)
1155 Input_file_argument file(pathname,
1157 ? Input_file_argument::INPUT_FILE_TYPE_LIBRARY
1158 : Input_file_argument::INPUT_FILE_TYPE_FILE),
1160 ? this->extra_search_path_.c_str()
1164 Input_argument* input_argument = new Input_argument(file);
1165 Task_token* next_blocker = new Task_token(true);
1166 next_blocker->add_blocker();
1167 if (parameters->incremental())
1168 gold_error(_("input files added by plug-ins in --incremental mode not "
1171 if (this->recorder_ != NULL)
1172 this->recorder_->replacement_file(pathname, is_lib);
1174 this->workqueue_->queue_soon(new Read_symbols(this->input_objects_,
1183 this->this_blocker_,
1185 this->this_blocker_ = next_blocker;
1186 this->any_added_ = true;
1192 Pluginobj::Pluginobj(const std::string& name, Input_file* input_file,
1193 off_t offset, off_t filesize)
1194 : Object(name, input_file, false, offset),
1195 nsyms_(0), syms_(NULL), symbols_(), filesize_(filesize), comdat_map_()
1199 // Return TRUE if a defined symbol is referenced from outside the
1200 // universe of claimed objects. Only references from relocatable,
1201 // non-IR (unclaimed) objects count as a reference. References from
1202 // dynamic objects count only as "visible".
1205 is_referenced_from_outside(Symbol* lsym)
1207 if (lsym->in_real_elf())
1209 if (parameters->options().relocatable())
1211 if (parameters->options().is_undefined(lsym->name()))
1216 // Return TRUE if a defined symbol might be reachable from outside the
1220 is_visible_from_outside(Symbol* lsym)
1224 if (parameters->options().export_dynamic() || parameters->options().shared()
1225 || parameters->options().in_dynamic_list(lsym->name())
1226 || parameters->options().is_export_dynamic_symbol(lsym->name()))
1227 return lsym->is_externally_visible();
1231 // Get symbol resolution info.
1234 Pluginobj::get_symbol_resolution_info(Symbol_table* symtab,
1236 ld_plugin_symbol* syms,
1239 // For version 1 of this interface, we cannot use
1240 // LDPR_PREVAILING_DEF_IRONLY_EXP, so we return LDPR_PREVAILING_DEF
1242 const ld_plugin_symbol_resolution ldpr_prevailing_def_ironly_exp
1244 ? LDPR_PREVAILING_DEF_IRONLY_EXP
1245 : LDPR_PREVAILING_DEF);
1247 if (nsyms > this->nsyms_)
1248 return LDPS_NO_SYMS;
1250 if (static_cast<size_t>(nsyms) > this->symbols_.size())
1252 // We never decided to include this object. We mark all symbols as
1254 gold_assert(this->symbols_.size() == 0);
1255 for (int i = 0; i < nsyms; i++)
1256 syms[i].resolution = LDPR_PREEMPTED_REG;
1257 return version > 2 ? LDPS_NO_SYMS : LDPS_OK;
1260 Plugin_manager* plugins = parameters->options().plugins();
1261 for (int i = 0; i < nsyms; i++)
1263 ld_plugin_symbol* isym = &syms[i];
1264 Symbol* lsym = this->symbols_[i];
1265 if (lsym->is_forwarder())
1266 lsym = symtab->resolve_forwards(lsym);
1267 ld_plugin_symbol_resolution res = LDPR_UNKNOWN;
1269 if (plugins->is_defsym_def(lsym->name()))
1271 // The symbol is redefined via defsym.
1272 res = LDPR_PREEMPTED_REG;
1274 else if (lsym->is_undefined())
1276 // The symbol remains undefined.
1279 else if (isym->def == LDPK_UNDEF
1280 || isym->def == LDPK_WEAKUNDEF
1281 || isym->def == LDPK_COMMON)
1283 // The original symbol was undefined or common.
1284 if (lsym->source() != Symbol::FROM_OBJECT)
1285 res = LDPR_RESOLVED_EXEC;
1286 else if (lsym->object()->pluginobj() == this)
1288 if (is_referenced_from_outside(lsym))
1289 res = LDPR_PREVAILING_DEF;
1290 else if (is_visible_from_outside(lsym))
1291 res = ldpr_prevailing_def_ironly_exp;
1293 res = LDPR_PREVAILING_DEF_IRONLY;
1295 else if (lsym->object()->pluginobj() != NULL)
1296 res = LDPR_RESOLVED_IR;
1297 else if (lsym->object()->is_dynamic())
1298 res = LDPR_RESOLVED_DYN;
1300 res = LDPR_RESOLVED_EXEC;
1304 // The original symbol was a definition.
1305 if (lsym->source() != Symbol::FROM_OBJECT)
1306 res = LDPR_PREEMPTED_REG;
1307 else if (lsym->object() == static_cast<const Object*>(this))
1309 if (is_referenced_from_outside(lsym))
1310 res = LDPR_PREVAILING_DEF;
1311 else if (is_visible_from_outside(lsym))
1312 res = ldpr_prevailing_def_ironly_exp;
1314 res = LDPR_PREVAILING_DEF_IRONLY;
1317 res = (lsym->object()->pluginobj() != NULL
1319 : LDPR_PREEMPTED_REG);
1321 isym->resolution = res;
1326 // Return TRUE if the comdat group with key COMDAT_KEY from this object
1330 Pluginobj::include_comdat_group(std::string comdat_key, Layout* layout)
1332 std::pair<Comdat_map::iterator, bool> ins =
1333 this->comdat_map_.insert(std::make_pair(comdat_key, false));
1335 // If this is the first time we've seen this comdat key, ask the
1336 // layout object whether it should be included.
1338 ins.first->second = layout->find_or_add_kept_section(comdat_key,
1342 return ins.first->second;
1345 // Class Sized_pluginobj.
1347 template<int size, bool big_endian>
1348 Sized_pluginobj<size, big_endian>::Sized_pluginobj(
1349 const std::string& name,
1350 Input_file* input_file,
1353 : Pluginobj(name, input_file, offset, filesize)
1357 // Read the symbols. Not used for plugin objects.
1359 template<int size, bool big_endian>
1361 Sized_pluginobj<size, big_endian>::do_read_symbols(Read_symbols_data*)
1366 // Lay out the input sections. Not used for plugin objects.
1368 template<int size, bool big_endian>
1370 Sized_pluginobj<size, big_endian>::do_layout(Symbol_table*, Layout*,
1376 // Add the symbols to the symbol table.
1378 template<int size, bool big_endian>
1380 Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table* symtab,
1384 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1385 unsigned char symbuf[sym_size];
1386 elfcpp::Sym<size, big_endian> sym(symbuf);
1387 elfcpp::Sym_write<size, big_endian> osym(symbuf);
1389 Plugin_recorder* recorder = parameters->options().plugins()->recorder();
1390 if (recorder != NULL)
1391 recorder->record_symbols(this, this->nsyms_, this->syms_);
1393 this->symbols_.resize(this->nsyms_);
1395 for (int i = 0; i < this->nsyms_; ++i)
1397 const struct ld_plugin_symbol* isym = &this->syms_[i];
1398 const char* name = isym->name;
1399 const char* ver = isym->version;
1400 elfcpp::Elf_Half shndx;
1404 if (name != NULL && name[0] == '\0')
1406 if (ver != NULL && ver[0] == '\0')
1412 case LDPK_WEAKUNDEF:
1413 bind = elfcpp::STB_WEAK;
1419 bind = elfcpp::STB_GLOBAL;
1427 // We use an arbitrary section number for a defined symbol.
1431 shndx = elfcpp::SHN_COMMON;
1434 case LDPK_WEAKUNDEF:
1436 shndx = elfcpp::SHN_UNDEF;
1440 switch (isym->visibility)
1442 case LDPV_PROTECTED:
1443 vis = elfcpp::STV_PROTECTED;
1446 vis = elfcpp::STV_INTERNAL;
1449 vis = elfcpp::STV_HIDDEN;
1453 vis = elfcpp::STV_DEFAULT;
1457 if (isym->comdat_key != NULL
1458 && isym->comdat_key[0] != '\0'
1459 && !this->include_comdat_group(isym->comdat_key, layout))
1460 shndx = elfcpp::SHN_UNDEF;
1462 osym.put_st_name(0);
1463 osym.put_st_value(0);
1464 osym.put_st_size(0);
1465 osym.put_st_info(bind, elfcpp::STT_NOTYPE);
1466 osym.put_st_other(vis, 0);
1467 osym.put_st_shndx(shndx);
1470 symtab->add_from_pluginobj<size, big_endian>(this, name, ver, &sym);
1474 template<int size, bool big_endian>
1475 Archive::Should_include
1476 Sized_pluginobj<size, big_endian>::do_should_include_member(
1477 Symbol_table* symtab,
1482 char* tmpbuf = NULL;
1483 size_t tmpbuflen = 0;
1485 for (int i = 0; i < this->nsyms_; ++i)
1487 const struct ld_plugin_symbol& sym = this->syms_[i];
1488 if (sym.def == LDPK_UNDEF || sym.def == LDPK_WEAKUNDEF)
1490 const char* name = sym.name;
1492 Archive::Should_include t = Archive::should_include_member(symtab,
1498 if (t == Archive::SHOULD_INCLUDE_YES)
1507 return Archive::SHOULD_INCLUDE_UNKNOWN;
1510 // Iterate over global symbols, calling a visitor class V for each.
1512 template<int size, bool big_endian>
1514 Sized_pluginobj<size, big_endian>::do_for_all_global_symbols(
1516 Library_base::Symbol_visitor_base* v)
1518 for (int i = 0; i < this->nsyms_; ++i)
1520 const struct ld_plugin_symbol& sym = this->syms_[i];
1521 if (sym.def != LDPK_UNDEF)
1526 // Iterate over local symbols, calling a visitor class V for each GOT offset
1527 // associated with a local symbol.
1528 template<int size, bool big_endian>
1530 Sized_pluginobj<size, big_endian>::do_for_all_local_got_entries(
1531 Got_offset_list::Visitor*) const
1536 // Get the size of a section. Not used for plugin objects.
1538 template<int size, bool big_endian>
1540 Sized_pluginobj<size, big_endian>::do_section_size(unsigned int)
1546 // Get the name of a section. Not used for plugin objects.
1548 template<int size, bool big_endian>
1550 Sized_pluginobj<size, big_endian>::do_section_name(unsigned int) const
1553 return std::string();
1556 // Return a view of the contents of a section. Not used for plugin objects.
1558 template<int size, bool big_endian>
1559 const unsigned char*
1560 Sized_pluginobj<size, big_endian>::do_section_contents(
1569 // Return section flags. Not used for plugin objects.
1571 template<int size, bool big_endian>
1573 Sized_pluginobj<size, big_endian>::do_section_flags(unsigned int)
1579 // Return section entsize. Not used for plugin objects.
1581 template<int size, bool big_endian>
1583 Sized_pluginobj<size, big_endian>::do_section_entsize(unsigned int)
1589 // Return section address. Not used for plugin objects.
1591 template<int size, bool big_endian>
1593 Sized_pluginobj<size, big_endian>::do_section_address(unsigned int)
1599 // Return section type. Not used for plugin objects.
1601 template<int size, bool big_endian>
1603 Sized_pluginobj<size, big_endian>::do_section_type(unsigned int)
1609 // Return the section link field. Not used for plugin objects.
1611 template<int size, bool big_endian>
1613 Sized_pluginobj<size, big_endian>::do_section_link(unsigned int)
1619 // Return the section link field. Not used for plugin objects.
1621 template<int size, bool big_endian>
1623 Sized_pluginobj<size, big_endian>::do_section_info(unsigned int)
1629 // Return the section alignment. Not used for plugin objects.
1631 template<int size, bool big_endian>
1633 Sized_pluginobj<size, big_endian>::do_section_addralign(unsigned int)
1639 // Return the Xindex structure to use. Not used for plugin objects.
1641 template<int size, bool big_endian>
1643 Sized_pluginobj<size, big_endian>::do_initialize_xindex()
1649 // Get symbol counts. Don't count plugin objects; the replacement
1650 // files will provide the counts.
1652 template<int size, bool big_endian>
1654 Sized_pluginobj<size, big_endian>::do_get_global_symbol_counts(
1655 const Symbol_table*,
1663 // Get symbols. Not used for plugin objects.
1665 template<int size, bool big_endian>
1666 const Object::Symbols*
1667 Sized_pluginobj<size, big_endian>::do_get_global_symbols() const
1672 // Class Plugin_finish. This task runs after all replacement files have
1673 // been added. For now, it's a placeholder for a possible plugin API
1674 // to allow the plugin to release most of its resources. The cleanup
1675 // handlers must be called later, because they can remove the temporary
1676 // object files that are needed until the end of the link.
1678 class Plugin_finish : public Task
1681 Plugin_finish(Task_token* this_blocker, Task_token* next_blocker)
1682 : this_blocker_(this_blocker), next_blocker_(next_blocker)
1687 if (this->this_blocker_ != NULL)
1688 delete this->this_blocker_;
1694 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
1695 return this->this_blocker_;
1700 locks(Task_locker* tl)
1701 { tl->add(this, this->next_blocker_); }
1706 Plugin_manager* plugins = parameters->options().plugins();
1707 gold_assert(plugins != NULL);
1708 // We could call early cleanup handlers here.
1709 if (plugins->recorder())
1710 plugins->recorder()->finish();
1715 { return "Plugin_finish"; }
1718 Task_token* this_blocker_;
1719 Task_token* next_blocker_;
1722 // Class Plugin_hook.
1724 Plugin_hook::~Plugin_hook()
1728 // Return whether a Plugin_hook task is runnable.
1731 Plugin_hook::is_runnable()
1733 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
1734 return this->this_blocker_;
1738 // Return a Task_locker for a Plugin_hook task. We don't need any
1742 Plugin_hook::locks(Task_locker*)
1746 // Run the "all symbols read" plugin hook.
1749 Plugin_hook::run(Workqueue* workqueue)
1751 gold_assert(this->options_.has_plugins());
1752 Symbol* start_sym = this->symtab_->lookup(parameters->entry());
1753 if (start_sym != NULL)
1754 start_sym->set_in_real_elf();
1756 this->options_.plugins()->all_symbols_read(workqueue,
1758 this->input_objects_,
1762 &this->this_blocker_);
1763 workqueue->queue_soon(new Plugin_finish(this->this_blocker_,
1764 this->next_blocker_));
1767 // The C interface routines called by the plugins.
1769 #ifdef ENABLE_PLUGINS
1771 // Register a claim-file handler.
1773 static enum ld_plugin_status
1774 register_claim_file(ld_plugin_claim_file_handler handler)
1776 gold_assert(parameters->options().has_plugins());
1777 parameters->options().plugins()->set_claim_file_handler(handler);
1781 // Register an all-symbols-read handler.
1783 static enum ld_plugin_status
1784 register_all_symbols_read(ld_plugin_all_symbols_read_handler handler)
1786 gold_assert(parameters->options().has_plugins());
1787 parameters->options().plugins()->set_all_symbols_read_handler(handler);
1791 // Register a cleanup handler.
1793 static enum ld_plugin_status
1794 register_cleanup(ld_plugin_cleanup_handler handler)
1796 gold_assert(parameters->options().has_plugins());
1797 parameters->options().plugins()->set_cleanup_handler(handler);
1801 // Add symbols from a plugin-claimed input file.
1803 static enum ld_plugin_status
1804 add_symbols(void* handle, int nsyms, const ld_plugin_symbol* syms)
1806 gold_assert(parameters->options().has_plugins());
1807 Pluginobj* obj = parameters->options().plugins()->make_plugin_object(
1808 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)));
1811 obj->store_incoming_symbols(nsyms, syms);
1815 // Get the input file information with an open (possibly re-opened)
1818 static enum ld_plugin_status
1819 get_input_file(const void* handle, struct ld_plugin_input_file* file)
1821 gold_assert(parameters->options().has_plugins());
1822 unsigned int obj_index =
1823 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle));
1824 return parameters->options().plugins()->get_input_file(obj_index, file);
1827 // Release the input file.
1829 static enum ld_plugin_status
1830 release_input_file(const void* handle)
1832 gold_assert(parameters->options().has_plugins());
1833 unsigned int obj_index =
1834 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle));
1835 return parameters->options().plugins()->release_input_file(obj_index);
1838 static enum ld_plugin_status
1839 get_view(const void *handle, const void **viewp)
1841 gold_assert(parameters->options().has_plugins());
1842 unsigned int obj_index =
1843 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle));
1844 return parameters->options().plugins()->get_view(obj_index, viewp);
1847 // Get the symbol resolution info for a plugin-claimed input file.
1849 static enum ld_plugin_status
1850 get_symbols(const void* handle, int nsyms, ld_plugin_symbol* syms)
1852 gold_assert(parameters->options().has_plugins());
1853 Plugin_manager* plugins = parameters->options().plugins();
1854 Object* obj = plugins->object(
1855 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)));
1858 Pluginobj* plugin_obj = obj->pluginobj();
1859 if (plugin_obj == NULL)
1861 Symbol_table* symtab = plugins->symtab();
1862 return plugin_obj->get_symbol_resolution_info(symtab, nsyms, syms, 1);
1865 // Version 2 of the above. The only difference is that this version
1866 // is allowed to return the resolution code LDPR_PREVAILING_DEF_IRONLY_EXP.
1868 static enum ld_plugin_status
1869 get_symbols_v2(const void* handle, int nsyms, ld_plugin_symbol* syms)
1871 gold_assert(parameters->options().has_plugins());
1872 Plugin_manager* plugins = parameters->options().plugins();
1873 Object* obj = plugins->object(
1874 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)));
1877 Pluginobj* plugin_obj = obj->pluginobj();
1878 if (plugin_obj == NULL)
1880 Symbol_table* symtab = plugins->symtab();
1881 return plugin_obj->get_symbol_resolution_info(symtab, nsyms, syms, 2);
1884 // Version 3 of the above. The only difference from v2 is that it
1885 // returns LDPS_NO_SYMS instead of LDPS_OK for the objects we never
1886 // decided to include.
1888 static enum ld_plugin_status
1889 get_symbols_v3(const void* handle, int nsyms, ld_plugin_symbol* syms)
1891 gold_assert(parameters->options().has_plugins());
1892 Plugin_manager* plugins = parameters->options().plugins();
1893 Object* obj = plugins->object(
1894 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)));
1897 Pluginobj* plugin_obj = obj->pluginobj();
1898 if (plugin_obj == NULL)
1900 Symbol_table* symtab = plugins->symtab();
1901 return plugin_obj->get_symbol_resolution_info(symtab, nsyms, syms, 3);
1904 // Add a new (real) input file generated by a plugin.
1906 static enum ld_plugin_status
1907 add_input_file(const char* pathname)
1909 gold_assert(parameters->options().has_plugins());
1910 return parameters->options().plugins()->add_input_file(pathname, false);
1913 // Add a new (real) library required by a plugin.
1915 static enum ld_plugin_status
1916 add_input_library(const char* pathname)
1918 gold_assert(parameters->options().has_plugins());
1919 return parameters->options().plugins()->add_input_file(pathname, true);
1922 // Set the extra library path to be used by libraries added via
1923 // add_input_library
1925 static enum ld_plugin_status
1926 set_extra_library_path(const char* path)
1928 gold_assert(parameters->options().has_plugins());
1929 return parameters->options().plugins()->set_extra_library_path(path);
1932 // Issue a diagnostic message from a plugin.
1934 static enum ld_plugin_status
1935 message(int level, const char* format, ...)
1938 va_start(args, format);
1943 parameters->errors()->info(format, args);
1946 parameters->errors()->warning(format, args);
1950 parameters->errors()->error(format, args);
1953 parameters->errors()->fatal(format, args);
1961 // Get the section count of the object corresponding to the handle. This
1962 // plugin interface can only be called in the claim_file handler of the plugin.
1964 static enum ld_plugin_status
1965 get_input_section_count(const void* handle, unsigned int* count)
1967 gold_assert(parameters->options().has_plugins());
1969 if (!parameters->options().plugins()->in_claim_file_handler())
1972 Object* obj = parameters->options().plugins()->get_elf_object(handle);
1977 *count = obj->shnum();
1981 // Get the type of the specified section in the object corresponding
1982 // to the handle. This plugin interface can only be called in the
1983 // claim_file handler of the plugin.
1985 static enum ld_plugin_status
1986 get_input_section_type(const struct ld_plugin_section section,
1989 gold_assert(parameters->options().has_plugins());
1991 if (!parameters->options().plugins()->in_claim_file_handler())
1995 = parameters->options().plugins()->get_elf_object(section.handle);
1998 return LDPS_BAD_HANDLE;
2000 *type = obj->section_type(section.shndx);
2004 // Get the name of the specified section in the object corresponding
2005 // to the handle. This plugin interface can only be called in the
2006 // claim_file handler of the plugin.
2008 static enum ld_plugin_status
2009 get_input_section_name(const struct ld_plugin_section section,
2010 char** section_name_ptr)
2012 gold_assert(parameters->options().has_plugins());
2014 if (!parameters->options().plugins()->in_claim_file_handler())
2018 = parameters->options().plugins()->get_elf_object(section.handle);
2021 return LDPS_BAD_HANDLE;
2023 // Check if the object is locked before getting the section name.
2024 gold_assert(obj->is_locked());
2026 const std::string section_name = obj->section_name(section.shndx);
2027 *section_name_ptr = static_cast<char*>(malloc(section_name.length() + 1));
2028 memcpy(*section_name_ptr, section_name.c_str(), section_name.length() + 1);
2032 // Get the contents of the specified section in the object corresponding
2033 // to the handle. This plugin interface can only be called in the
2034 // claim_file handler of the plugin.
2036 static enum ld_plugin_status
2037 get_input_section_contents(const struct ld_plugin_section section,
2038 const unsigned char** section_contents_ptr,
2041 gold_assert(parameters->options().has_plugins());
2043 if (!parameters->options().plugins()->in_claim_file_handler())
2047 = parameters->options().plugins()->get_elf_object(section.handle);
2050 return LDPS_BAD_HANDLE;
2052 // Check if the object is locked before getting the section contents.
2053 gold_assert(obj->is_locked());
2055 section_size_type plen;
2056 *section_contents_ptr
2057 = obj->section_contents(section.shndx, &plen, false);
2062 // Get the alignment of the specified section in the object corresponding
2063 // to the handle. This plugin interface can only be called in the
2064 // claim_file handler of the plugin.
2066 static enum ld_plugin_status
2067 get_input_section_alignment(const struct ld_plugin_section section,
2068 unsigned int* addralign)
2070 gold_assert(parameters->options().has_plugins());
2072 if (!parameters->options().plugins()->in_claim_file_handler())
2076 = parameters->options().plugins()->get_elf_object(section.handle);
2079 return LDPS_BAD_HANDLE;
2081 *addralign = obj->section_addralign(section.shndx);
2085 // Get the size of the specified section in the object corresponding
2086 // to the handle. This plugin interface can only be called in the
2087 // claim_file handler of the plugin.
2089 static enum ld_plugin_status
2090 get_input_section_size(const struct ld_plugin_section section,
2093 gold_assert(parameters->options().has_plugins());
2095 if (!parameters->options().plugins()->in_claim_file_handler())
2099 = parameters->options().plugins()->get_elf_object(section.handle);
2102 return LDPS_BAD_HANDLE;
2104 *secsize = obj->section_size(section.shndx);
2108 static enum ld_plugin_status
2109 get_wrap_symbols(uint64_t *count, const char ***wrap_symbols)
2111 gold_assert(parameters->options().has_plugins());
2112 *count = parameters->options().wrap_size();
2117 *wrap_symbols = new const char *[*count];
2119 for (options::String_set::const_iterator
2120 it = parameters->options().wrap_begin();
2121 it != parameters->options().wrap_end(); ++it, ++i) {
2122 (*wrap_symbols)[i] = it->c_str();
2128 // Specify the ordering of sections in the final layout. The sections are
2129 // specified as (handle,shndx) pairs in the two arrays in the order in
2130 // which they should appear in the final layout.
2132 static enum ld_plugin_status
2133 update_section_order(const struct ld_plugin_section* section_list,
2134 unsigned int num_sections)
2136 gold_assert(parameters->options().has_plugins());
2138 if (num_sections == 0)
2141 if (section_list == NULL)
2144 Layout* layout = parameters->options().plugins()->layout();
2145 gold_assert (layout != NULL);
2147 std::map<Section_id, unsigned int>* order_map
2148 = layout->get_section_order_map();
2150 /* Store the mapping from Section_id to section position in layout's
2151 order_map to consult after output sections are added. */
2152 for (unsigned int i = 0; i < num_sections; ++i)
2154 Object* obj = parameters->options().plugins()->get_elf_object(
2155 section_list[i].handle);
2156 if (obj == NULL || obj->is_dynamic())
2157 return LDPS_BAD_HANDLE;
2158 unsigned int shndx = section_list[i].shndx;
2159 Section_id secn_id(static_cast<Relobj*>(obj), shndx);
2160 (*order_map)[secn_id] = i + 1;
2166 // Let the linker know that the sections could be reordered.
2168 static enum ld_plugin_status
2169 allow_section_ordering()
2171 gold_assert(parameters->options().has_plugins());
2172 Layout* layout = parameters->options().plugins()->layout();
2173 layout->set_section_ordering_specified();
2177 // Let the linker know that a subset of sections could be mapped
2178 // to a unique segment.
2180 static enum ld_plugin_status
2181 allow_unique_segment_for_sections()
2183 gold_assert(parameters->options().has_plugins());
2184 Layout* layout = parameters->options().plugins()->layout();
2185 layout->set_unique_segment_for_sections_specified();
2189 // This function should map the list of sections specified in the
2190 // SECTION_LIST to a unique segment. ELF segments do not have names
2191 // and the NAME is used to identify Output Section which should contain
2192 // the list of sections. This Output Section will then be mapped to
2193 // a unique segment. FLAGS is used to specify if any additional segment
2194 // flags need to be set. For instance, a specific segment flag can be
2195 // set to identify this segment. Unsetting segment flags is not possible.
2196 // ALIGN specifies the alignment of the segment.
2198 static enum ld_plugin_status
2199 unique_segment_for_sections(const char* segment_name,
2202 const struct ld_plugin_section* section_list,
2203 unsigned int num_sections)
2205 gold_assert(parameters->options().has_plugins());
2207 if (num_sections == 0)
2210 if (section_list == NULL)
2213 Layout* layout = parameters->options().plugins()->layout();
2214 gold_assert (layout != NULL);
2216 Layout::Unique_segment_info* s = new Layout::Unique_segment_info;
2217 s->name = segment_name;
2221 for (unsigned int i = 0; i < num_sections; ++i)
2223 Object* obj = parameters->options().plugins()->get_elf_object(
2224 section_list[i].handle);
2225 if (obj == NULL || obj->is_dynamic())
2226 return LDPS_BAD_HANDLE;
2227 unsigned int shndx = section_list[i].shndx;
2228 Const_section_id secn_id(static_cast<Relobj*>(obj), shndx);
2229 layout->insert_section_segment_map(secn_id, s);
2235 // Register a new_input handler.
2237 static enum ld_plugin_status
2238 register_new_input(ld_plugin_new_input_handler handler)
2240 gold_assert(parameters->options().has_plugins());
2241 parameters->options().plugins()->set_new_input_handler(handler);
2245 #endif // ENABLE_PLUGINS
2247 // Allocate a Pluginobj object of the appropriate size and endianness.
2250 make_sized_plugin_object(const std::string& filename,
2251 Input_file* input_file, off_t offset, off_t filesize)
2253 Pluginobj* obj = NULL;
2255 parameters_force_valid_target();
2256 const Target& target(parameters->target());
2258 if (target.get_size() == 32)
2260 if (target.is_big_endian())
2261 #ifdef HAVE_TARGET_32_BIG
2262 obj = new Sized_pluginobj<32, true>(filename, input_file,
2265 gold_error(_("%s: not configured to support "
2266 "32-bit big-endian object"),
2270 #ifdef HAVE_TARGET_32_LITTLE
2271 obj = new Sized_pluginobj<32, false>(filename, input_file,
2274 gold_error(_("%s: not configured to support "
2275 "32-bit little-endian object"),
2279 else if (target.get_size() == 64)
2281 if (target.is_big_endian())
2282 #ifdef HAVE_TARGET_64_BIG
2283 obj = new Sized_pluginobj<64, true>(filename, input_file,
2286 gold_error(_("%s: not configured to support "
2287 "64-bit big-endian object"),
2291 #ifdef HAVE_TARGET_64_LITTLE
2292 obj = new Sized_pluginobj<64, false>(filename, input_file,
2295 gold_error(_("%s: not configured to support "
2296 "64-bit little-endian object"),
2301 gold_assert(obj != NULL);
2305 } // End namespace gold.