1 // plugin.cc -- plugin manager for gold -*- C++ -*-
3 // Copyright 2008, 2009, 2010, 2011 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.
35 #include "parameters.h"
51 // The linker's exported interfaces.
56 static enum ld_plugin_status
57 register_claim_file(ld_plugin_claim_file_handler handler);
59 static enum ld_plugin_status
60 register_all_symbols_read(ld_plugin_all_symbols_read_handler handler);
62 static enum ld_plugin_status
63 register_cleanup(ld_plugin_cleanup_handler handler);
65 static enum ld_plugin_status
66 add_symbols(void *handle, int nsyms, const struct ld_plugin_symbol *syms);
68 static enum ld_plugin_status
69 get_input_file(const void *handle, struct ld_plugin_input_file *file);
71 static enum ld_plugin_status
72 release_input_file(const void *handle);
74 static enum ld_plugin_status
75 get_symbols(const void *handle, int nsyms, struct ld_plugin_symbol *syms);
77 static enum ld_plugin_status
78 add_input_file(const char *pathname);
80 static enum ld_plugin_status
81 add_input_library(const char *pathname);
83 static enum ld_plugin_status
84 set_extra_library_path(const char *path);
86 static enum ld_plugin_status
87 message(int level, const char *format, ...);
91 #endif // ENABLE_PLUGINS
93 static Pluginobj* make_sized_plugin_object(Input_file* input_file,
94 off_t offset, off_t filesize);
98 // Load one plugin library.
103 #ifdef ENABLE_PLUGINS
104 // Load the plugin library.
105 // FIXME: Look for the library in standard locations.
106 this->handle_ = dlopen(this->filename_.c_str(), RTLD_NOW);
107 if (this->handle_ == NULL)
109 gold_error(_("%s: could not load plugin library: %s"),
110 this->filename_.c_str(), dlerror());
114 // Find the plugin's onload entry point.
115 void* ptr = dlsym(this->handle_, "onload");
118 gold_error(_("%s: could not find onload entry point"),
119 this->filename_.c_str());
122 ld_plugin_onload onload;
123 gold_assert(sizeof(onload) == sizeof(ptr));
124 memcpy(&onload, &ptr, sizeof(ptr));
126 // Get the linker's version number.
127 const char* ver = get_version_string();
130 sscanf(ver, "%d.%d", &major, &minor);
132 // Allocate and populate a transfer vector.
133 const int tv_fixed_size = 16;
134 int tv_size = this->args_.size() + tv_fixed_size;
135 ld_plugin_tv* tv = new ld_plugin_tv[tv_size];
137 // Put LDPT_MESSAGE at the front of the list so the plugin can use it
138 // while processing subsequent entries.
140 tv[i].tv_tag = LDPT_MESSAGE;
141 tv[i].tv_u.tv_message = message;
144 tv[i].tv_tag = LDPT_API_VERSION;
145 tv[i].tv_u.tv_val = LD_PLUGIN_API_VERSION;
148 tv[i].tv_tag = LDPT_GOLD_VERSION;
149 tv[i].tv_u.tv_val = major * 100 + minor;
152 tv[i].tv_tag = LDPT_LINKER_OUTPUT;
153 if (parameters->options().relocatable())
154 tv[i].tv_u.tv_val = LDPO_REL;
155 else if (parameters->options().shared())
156 tv[i].tv_u.tv_val = LDPO_DYN;
158 tv[i].tv_u.tv_val = LDPO_EXEC;
161 tv[i].tv_tag = LDPT_OUTPUT_NAME;
162 tv[i].tv_u.tv_string = parameters->options().output();
164 for (unsigned int j = 0; j < this->args_.size(); ++j)
167 tv[i].tv_tag = LDPT_OPTION;
168 tv[i].tv_u.tv_string = this->args_[j].c_str();
172 tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK;
173 tv[i].tv_u.tv_register_claim_file = register_claim_file;
176 tv[i].tv_tag = LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK;
177 tv[i].tv_u.tv_register_all_symbols_read = register_all_symbols_read;
180 tv[i].tv_tag = LDPT_REGISTER_CLEANUP_HOOK;
181 tv[i].tv_u.tv_register_cleanup = register_cleanup;
184 tv[i].tv_tag = LDPT_ADD_SYMBOLS;
185 tv[i].tv_u.tv_add_symbols = add_symbols;
188 tv[i].tv_tag = LDPT_GET_INPUT_FILE;
189 tv[i].tv_u.tv_get_input_file = get_input_file;
192 tv[i].tv_tag = LDPT_RELEASE_INPUT_FILE;
193 tv[i].tv_u.tv_release_input_file = release_input_file;
196 tv[i].tv_tag = LDPT_GET_SYMBOLS;
197 tv[i].tv_u.tv_get_symbols = get_symbols;
200 tv[i].tv_tag = LDPT_ADD_INPUT_FILE;
201 tv[i].tv_u.tv_add_input_file = add_input_file;
204 tv[i].tv_tag = LDPT_ADD_INPUT_LIBRARY;
205 tv[i].tv_u.tv_add_input_library = add_input_library;
208 tv[i].tv_tag = LDPT_SET_EXTRA_LIBRARY_PATH;
209 tv[i].tv_u.tv_set_extra_library_path = set_extra_library_path;
212 tv[i].tv_tag = LDPT_NULL;
213 tv[i].tv_u.tv_val = 0;
215 gold_assert(i == tv_size - 1);
217 // Call the onload entry point.
221 #endif // ENABLE_PLUGINS
224 // Call the plugin claim-file handler.
227 Plugin::claim_file(struct ld_plugin_input_file* plugin_input_file)
231 if (this->claim_file_handler_ != NULL)
233 (*this->claim_file_handler_)(plugin_input_file, &claimed);
240 // Call the all-symbols-read handler.
243 Plugin::all_symbols_read()
245 if (this->all_symbols_read_handler_ != NULL)
246 (*this->all_symbols_read_handler_)();
249 // Call the cleanup handler.
254 if (this->cleanup_handler_ != NULL && !this->cleanup_done_)
256 // Set this flag before calling to prevent a recursive plunge
257 // in the event that a plugin's cleanup handler issues a
259 this->cleanup_done_ = true;
260 (*this->cleanup_handler_)();
264 // This task is used to rescan archives as needed.
266 class Plugin_rescan : public Task
269 Plugin_rescan(Task_token* this_blocker, Task_token* next_blocker)
270 : this_blocker_(this_blocker), next_blocker_(next_blocker)
275 delete this->this_blocker_;
281 if (this->this_blocker_->is_blocked())
282 return this->this_blocker_;
287 locks(Task_locker* tl)
288 { tl->add(this, this->next_blocker_); }
292 { parameters->options().plugins()->rescan(this); }
296 { return "Plugin_rescan"; }
299 Task_token* this_blocker_;
300 Task_token* next_blocker_;
303 // Plugin_manager methods.
305 Plugin_manager::~Plugin_manager()
307 for (Plugin_list::iterator p = this->plugins_.begin();
308 p != this->plugins_.end();
311 this->plugins_.clear();
312 for (Object_list::iterator obj = this->objects_.begin();
313 obj != this->objects_.end();
316 this->objects_.clear();
319 // Load all plugin libraries.
322 Plugin_manager::load_plugins()
324 for (this->current_ = this->plugins_.begin();
325 this->current_ != this->plugins_.end();
327 (*this->current_)->load();
330 // Call the plugin claim-file handlers in turn to see if any claim the file.
333 Plugin_manager::claim_file(Input_file* input_file, off_t offset,
336 if (this->in_replacement_phase_)
339 unsigned int handle = this->objects_.size();
340 this->input_file_ = input_file;
341 this->plugin_input_file_.name = input_file->filename().c_str();
342 this->plugin_input_file_.fd = input_file->file().descriptor();
343 this->plugin_input_file_.offset = offset;
344 this->plugin_input_file_.filesize = filesize;
345 this->plugin_input_file_.handle = reinterpret_cast<void*>(handle);
347 for (this->current_ = this->plugins_.begin();
348 this->current_ != this->plugins_.end();
351 if ((*this->current_)->claim_file(&this->plugin_input_file_))
353 this->any_claimed_ = true;
355 if (this->objects_.size() > handle)
356 return this->objects_[handle];
358 // If the plugin claimed the file but did not call the
359 // add_symbols callback, we need to create the Pluginobj now.
360 Pluginobj* obj = this->make_plugin_object(handle);
368 // Save an archive. This is used so that a plugin can add a file
369 // which refers to a symbol which was not previously referenced. In
370 // that case we want to pretend that the symbol was referenced before,
371 // and pull in the archive object.
374 Plugin_manager::save_archive(Archive* archive)
376 if (this->in_replacement_phase_ || !this->any_claimed_)
379 this->rescannable_.push_back(Rescannable(archive));
382 // Save an Input_group. This is like save_archive.
385 Plugin_manager::save_input_group(Input_group* input_group)
387 if (this->in_replacement_phase_ || !this->any_claimed_)
390 this->rescannable_.push_back(Rescannable(input_group));
393 // Call the all-symbols-read handlers.
396 Plugin_manager::all_symbols_read(Workqueue* workqueue, Task* task,
397 Input_objects* input_objects,
398 Symbol_table* symtab, Layout* layout,
399 Dirsearch* dirpath, Mapfile* mapfile,
400 Task_token** last_blocker)
402 this->in_replacement_phase_ = true;
403 this->workqueue_ = workqueue;
405 this->input_objects_ = input_objects;
406 this->symtab_ = symtab;
407 this->layout_ = layout;
408 this->dirpath_ = dirpath;
409 this->mapfile_ = mapfile;
410 this->this_blocker_ = NULL;
412 for (this->current_ = this->plugins_.begin();
413 this->current_ != this->plugins_.end();
415 (*this->current_)->all_symbols_read();
417 if (this->any_added_)
419 Task_token* next_blocker = new Task_token(true);
420 next_blocker->add_blocker();
421 workqueue->queue(new Plugin_rescan(this->this_blocker_, next_blocker));
422 this->this_blocker_ = next_blocker;
425 *last_blocker = this->this_blocker_;
428 // This is called when we see a new undefined symbol. If we are in
429 // the replacement phase, this means that we may need to rescan some
430 // archives we have previously seen.
433 Plugin_manager::new_undefined_symbol(Symbol* sym)
435 if (this->in_replacement_phase_)
436 this->undefined_symbols_.push_back(sym);
439 // Rescan archives as needed. This handles the case where a new
440 // object file added by a plugin has an undefined reference to some
441 // symbol defined in an archive.
444 Plugin_manager::rescan(Task* task)
446 size_t rescan_pos = 0;
447 size_t rescan_size = this->rescannable_.size();
448 while (!this->undefined_symbols_.empty())
450 if (rescan_pos >= rescan_size)
452 this->undefined_symbols_.clear();
456 Undefined_symbol_list undefs;
457 undefs.reserve(this->undefined_symbols_.size());
458 this->undefined_symbols_.swap(undefs);
460 size_t min_rescan_pos = rescan_size;
462 for (Undefined_symbol_list::const_iterator p = undefs.begin();
466 if (!(*p)->is_undefined())
469 this->undefined_symbols_.push_back(*p);
471 // Find the first rescan archive which defines this symbol,
472 // starting at the current rescan position. The rescan position
473 // exists so that given -la -lb -lc we don't look for undefined
474 // symbols in -lb back in -la, but instead get the definition
475 // from -lc. Don't bother to look past the current minimum
477 for (size_t i = rescan_pos; i < min_rescan_pos; ++i)
479 if (this->rescannable_defines(i, *p))
487 if (min_rescan_pos >= rescan_size)
489 // We didn't find any rescannable archives which define any
490 // undefined symbols.
494 const Rescannable& r(this->rescannable_[min_rescan_pos]);
497 Task_lock_obj<Archive> tl(task, r.u.archive);
498 r.u.archive->add_symbols(this->symtab_, this->layout_,
499 this->input_objects_, this->mapfile_);
503 size_t next_saw_undefined = this->symtab_->saw_undefined();
504 size_t saw_undefined;
507 saw_undefined = next_saw_undefined;
509 for (Input_group::const_iterator p = r.u.input_group->begin();
510 p != r.u.input_group->end();
513 Task_lock_obj<Archive> tl(task, *p);
515 (*p)->add_symbols(this->symtab_, this->layout_,
516 this->input_objects_, this->mapfile_);
519 next_saw_undefined = this->symtab_->saw_undefined();
521 while (saw_undefined != next_saw_undefined);
524 for (size_t i = rescan_pos; i < min_rescan_pos + 1; ++i)
526 if (this->rescannable_[i].is_archive)
527 delete this->rescannable_[i].u.archive;
529 delete this->rescannable_[i].u.input_group;
532 rescan_pos = min_rescan_pos + 1;
536 // Return whether the rescannable at index I defines SYM.
539 Plugin_manager::rescannable_defines(size_t i, Symbol* sym)
541 const Rescannable& r(this->rescannable_[i]);
543 return r.u.archive->defines_symbol(sym);
546 for (Input_group::const_iterator p = r.u.input_group->begin();
547 p != r.u.input_group->end();
550 if ((*p)->defines_symbol(sym))
557 // Layout deferred objects.
560 Plugin_manager::layout_deferred_objects()
562 Deferred_layout_list::iterator obj;
564 for (obj = this->deferred_layout_objects_.begin();
565 obj != this->deferred_layout_objects_.end();
568 // Lock the object so we can read from it. This is only called
569 // single-threaded from queue_middle_tasks, so it is OK to lock.
570 // Unfortunately we have no way to pass in a Task token.
571 const Task* dummy_task = reinterpret_cast<const Task*>(-1);
572 Task_lock_obj<Object> tl(dummy_task, *obj);
573 (*obj)->layout_deferred_sections(this->layout_);
577 // Call the cleanup handlers.
580 Plugin_manager::cleanup()
582 for (this->current_ = this->plugins_.begin();
583 this->current_ != this->plugins_.end();
585 (*this->current_)->cleanup();
588 // Make a new Pluginobj object. This is called when the plugin calls
589 // the add_symbols API.
592 Plugin_manager::make_plugin_object(unsigned int handle)
594 // Make sure we aren't asked to make an object for the same handle twice.
595 if (this->objects_.size() != handle)
598 Pluginobj* obj = make_sized_plugin_object(this->input_file_,
599 this->plugin_input_file_.offset,
600 this->plugin_input_file_.filesize);
601 this->objects_.push_back(obj);
605 // Get the input file information with an open (possibly re-opened)
609 Plugin_manager::get_input_file(unsigned int handle,
610 struct ld_plugin_input_file* file)
612 Pluginobj* obj = this->object(handle);
614 return LDPS_BAD_HANDLE;
616 obj->lock(this->task_);
617 file->name = obj->filename().c_str();
618 file->fd = obj->descriptor();
619 file->offset = obj->offset();
620 file->filesize = obj->filesize();
621 file->handle = reinterpret_cast<void*>(handle);
625 // Release the input file.
628 Plugin_manager::release_input_file(unsigned int handle)
630 Pluginobj* obj = this->object(handle);
632 return LDPS_BAD_HANDLE;
634 obj->unlock(this->task_);
638 // Add a new library path.
641 Plugin_manager::set_extra_library_path(const char* path)
643 this->extra_search_path_ = std::string(path);
647 // Add a new input file.
650 Plugin_manager::add_input_file(const char* pathname, bool is_lib)
652 Input_file_argument file(pathname,
654 ? Input_file_argument::INPUT_FILE_TYPE_LIBRARY
655 : Input_file_argument::INPUT_FILE_TYPE_FILE),
657 ? this->extra_search_path_.c_str()
661 Input_argument* input_argument = new Input_argument(file);
662 Task_token* next_blocker = new Task_token(true);
663 next_blocker->add_blocker();
664 if (parameters->incremental())
665 gold_error(_("input files added by plug-ins in --incremental mode not "
667 this->workqueue_->queue_soon(new Read_symbols(this->input_objects_,
678 this->this_blocker_ = next_blocker;
679 this->any_added_ = true;
685 Pluginobj::Pluginobj(const std::string& name, Input_file* input_file,
686 off_t offset, off_t filesize)
687 : Object(name, input_file, false, offset),
688 nsyms_(0), syms_(NULL), symbols_(), filesize_(filesize), comdat_map_()
692 // Return TRUE if a defined symbol might be reachable from outside the
693 // universe of claimed objects.
696 is_visible_from_outside(Symbol* lsym)
698 if (lsym->in_real_elf())
700 if (parameters->options().relocatable())
702 if (parameters->options().export_dynamic() || parameters->options().shared())
703 return lsym->is_externally_visible();
707 // Get symbol resolution info.
710 Pluginobj::get_symbol_resolution_info(int nsyms, ld_plugin_symbol* syms) const
712 if (nsyms > this->nsyms_)
715 if (static_cast<size_t>(nsyms) > this->symbols_.size())
717 // We never decided to include this object. We mark all symbols as
719 gold_assert(this->symbols_.size() == 0);
720 for (int i = 0; i < nsyms; i++)
721 syms[i].resolution = LDPR_PREEMPTED_REG;
725 for (int i = 0; i < nsyms; i++)
727 ld_plugin_symbol* isym = &syms[i];
728 Symbol* lsym = this->symbols_[i];
729 ld_plugin_symbol_resolution res = LDPR_UNKNOWN;
731 if (lsym->is_undefined())
732 // The symbol remains undefined.
734 else if (isym->def == LDPK_UNDEF
735 || isym->def == LDPK_WEAKUNDEF
736 || isym->def == LDPK_COMMON)
738 // The original symbol was undefined or common.
739 if (lsym->source() != Symbol::FROM_OBJECT)
740 res = LDPR_RESOLVED_EXEC;
741 else if (lsym->object()->pluginobj() == this)
742 res = (is_visible_from_outside(lsym)
743 ? LDPR_PREVAILING_DEF
744 : LDPR_PREVAILING_DEF_IRONLY);
745 else if (lsym->object()->pluginobj() != NULL)
746 res = LDPR_RESOLVED_IR;
747 else if (lsym->object()->is_dynamic())
748 res = LDPR_RESOLVED_DYN;
750 res = LDPR_RESOLVED_EXEC;
754 // The original symbol was a definition.
755 if (lsym->source() != Symbol::FROM_OBJECT)
756 res = LDPR_PREEMPTED_REG;
757 else if (lsym->object() == static_cast<const Object*>(this))
758 res = (is_visible_from_outside(lsym)
759 ? LDPR_PREVAILING_DEF
760 : LDPR_PREVAILING_DEF_IRONLY);
762 res = (lsym->object()->pluginobj() != NULL
764 : LDPR_PREEMPTED_REG);
766 isym->resolution = res;
771 // Return TRUE if the comdat group with key COMDAT_KEY from this object
775 Pluginobj::include_comdat_group(std::string comdat_key, Layout* layout)
777 std::pair<Comdat_map::iterator, bool> ins =
778 this->comdat_map_.insert(std::make_pair(comdat_key, false));
780 // If this is the first time we've seen this comdat key, ask the
781 // layout object whether it should be included.
783 ins.first->second = layout->find_or_add_kept_section(comdat_key,
787 return ins.first->second;
790 // Class Sized_pluginobj.
792 template<int size, bool big_endian>
793 Sized_pluginobj<size, big_endian>::Sized_pluginobj(
794 const std::string& name,
795 Input_file* input_file,
798 : Pluginobj(name, input_file, offset, filesize)
802 // Read the symbols. Not used for plugin objects.
804 template<int size, bool big_endian>
806 Sized_pluginobj<size, big_endian>::do_read_symbols(Read_symbols_data*)
811 // Lay out the input sections. Not used for plugin objects.
813 template<int size, bool big_endian>
815 Sized_pluginobj<size, big_endian>::do_layout(Symbol_table*, Layout*,
821 // Add the symbols to the symbol table.
823 template<int size, bool big_endian>
825 Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table* symtab,
829 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
830 unsigned char symbuf[sym_size];
831 elfcpp::Sym<size, big_endian> sym(symbuf);
832 elfcpp::Sym_write<size, big_endian> osym(symbuf);
834 typedef typename elfcpp::Elf_types<size>::Elf_WXword Elf_size_type;
836 this->symbols_.resize(this->nsyms_);
838 for (int i = 0; i < this->nsyms_; ++i)
840 const struct ld_plugin_symbol* isym = &this->syms_[i];
841 const char* name = isym->name;
842 const char* ver = isym->version;
843 elfcpp::Elf_Half shndx;
847 if (name != NULL && name[0] == '\0')
849 if (ver != NULL && ver[0] == '\0')
856 bind = elfcpp::STB_WEAK;
862 bind = elfcpp::STB_GLOBAL;
870 shndx = elfcpp::SHN_ABS;
873 shndx = elfcpp::SHN_COMMON;
878 shndx = elfcpp::SHN_UNDEF;
882 switch (isym->visibility)
885 vis = elfcpp::STV_PROTECTED;
888 vis = elfcpp::STV_INTERNAL;
891 vis = elfcpp::STV_HIDDEN;
895 vis = elfcpp::STV_DEFAULT;
899 if (isym->comdat_key != NULL
900 && isym->comdat_key[0] != '\0'
901 && !this->include_comdat_group(isym->comdat_key, layout))
902 shndx = elfcpp::SHN_UNDEF;
905 osym.put_st_value(0);
906 osym.put_st_size(static_cast<Elf_size_type>(isym->size));
907 osym.put_st_info(bind, elfcpp::STT_NOTYPE);
908 osym.put_st_other(vis, 0);
909 osym.put_st_shndx(shndx);
912 symtab->add_from_pluginobj<size, big_endian>(this, name, ver, &sym);
916 template<int size, bool big_endian>
917 Archive::Should_include
918 Sized_pluginobj<size, big_endian>::do_should_include_member(
919 Symbol_table* symtab,
925 size_t tmpbuflen = 0;
927 for (int i = 0; i < this->nsyms_; ++i)
929 const struct ld_plugin_symbol& sym = this->syms_[i];
930 const char* name = sym.name;
932 Archive::Should_include t = Archive::should_include_member(symtab,
938 if (t == Archive::SHOULD_INCLUDE_YES)
947 return Archive::SHOULD_INCLUDE_UNKNOWN;
950 // Get the size of a section. Not used for plugin objects.
952 template<int size, bool big_endian>
954 Sized_pluginobj<size, big_endian>::do_section_size(unsigned int)
960 // Get the name of a section. Not used for plugin objects.
962 template<int size, bool big_endian>
964 Sized_pluginobj<size, big_endian>::do_section_name(unsigned int)
967 return std::string();
970 // Return a view of the contents of a section. Not used for plugin objects.
972 template<int size, bool big_endian>
974 Sized_pluginobj<size, big_endian>::do_section_contents(unsigned int)
982 // Return section flags. Not used for plugin objects.
984 template<int size, bool big_endian>
986 Sized_pluginobj<size, big_endian>::do_section_flags(unsigned int)
992 // Return section entsize. Not used for plugin objects.
994 template<int size, bool big_endian>
996 Sized_pluginobj<size, big_endian>::do_section_entsize(unsigned int)
1002 // Return section address. Not used for plugin objects.
1004 template<int size, bool big_endian>
1006 Sized_pluginobj<size, big_endian>::do_section_address(unsigned int)
1012 // Return section type. Not used for plugin objects.
1014 template<int size, bool big_endian>
1016 Sized_pluginobj<size, big_endian>::do_section_type(unsigned int)
1022 // Return the section link field. Not used for plugin objects.
1024 template<int size, bool big_endian>
1026 Sized_pluginobj<size, big_endian>::do_section_link(unsigned int)
1032 // Return the section link field. Not used for plugin objects.
1034 template<int size, bool big_endian>
1036 Sized_pluginobj<size, big_endian>::do_section_info(unsigned int)
1042 // Return the section alignment. Not used for plugin objects.
1044 template<int size, bool big_endian>
1046 Sized_pluginobj<size, big_endian>::do_section_addralign(unsigned int)
1052 // Return the Xindex structure to use. Not used for plugin objects.
1054 template<int size, bool big_endian>
1056 Sized_pluginobj<size, big_endian>::do_initialize_xindex()
1062 // Get symbol counts. Not used for plugin objects.
1064 template<int size, bool big_endian>
1066 Sized_pluginobj<size, big_endian>::do_get_global_symbol_counts(const Symbol_table*,
1067 size_t*, size_t*) const
1072 // Get symbols. Not used for plugin objects.
1074 template<int size, bool big_endian>
1075 const Object::Symbols*
1076 Sized_pluginobj<size, big_endian>::do_get_global_symbols() const
1081 // Class Plugin_finish. This task runs after all replacement files have
1082 // been added. For now, it's a placeholder for a possible plugin API
1083 // to allow the plugin to release most of its resources. The cleanup
1084 // handlers must be called later, because they can remove the temporary
1085 // object files that are needed until the end of the link.
1087 class Plugin_finish : public Task
1090 Plugin_finish(Task_token* this_blocker, Task_token* next_blocker)
1091 : this_blocker_(this_blocker), next_blocker_(next_blocker)
1096 if (this->this_blocker_ != NULL)
1097 delete this->this_blocker_;
1103 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
1104 return this->this_blocker_;
1109 locks(Task_locker* tl)
1110 { tl->add(this, this->next_blocker_); }
1115 // We could call early cleanup handlers here.
1120 { return "Plugin_finish"; }
1123 Task_token* this_blocker_;
1124 Task_token* next_blocker_;
1127 // Class Plugin_hook.
1129 Plugin_hook::~Plugin_hook()
1133 // Return whether a Plugin_hook task is runnable.
1136 Plugin_hook::is_runnable()
1138 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
1139 return this->this_blocker_;
1143 // Return a Task_locker for a Plugin_hook task. We don't need any
1147 Plugin_hook::locks(Task_locker*)
1151 // Run the "all symbols read" plugin hook.
1154 Plugin_hook::run(Workqueue* workqueue)
1156 gold_assert(this->options_.has_plugins());
1158 if (parameters->options().entry())
1159 start_sym = this->symtab_->lookup(parameters->options().entry());
1161 start_sym = this->symtab_->lookup("_start");
1162 if (start_sym != NULL)
1163 start_sym->set_in_real_elf();
1165 this->options_.plugins()->all_symbols_read(workqueue,
1167 this->input_objects_,
1172 &this->this_blocker_);
1173 workqueue->queue_soon(new Plugin_finish(this->this_blocker_,
1174 this->next_blocker_));
1177 // The C interface routines called by the plugins.
1179 #ifdef ENABLE_PLUGINS
1181 // Register a claim-file handler.
1183 static enum ld_plugin_status
1184 register_claim_file(ld_plugin_claim_file_handler handler)
1186 gold_assert(parameters->options().has_plugins());
1187 parameters->options().plugins()->set_claim_file_handler(handler);
1191 // Register an all-symbols-read handler.
1193 static enum ld_plugin_status
1194 register_all_symbols_read(ld_plugin_all_symbols_read_handler handler)
1196 gold_assert(parameters->options().has_plugins());
1197 parameters->options().plugins()->set_all_symbols_read_handler(handler);
1201 // Register a cleanup handler.
1203 static enum ld_plugin_status
1204 register_cleanup(ld_plugin_cleanup_handler handler)
1206 gold_assert(parameters->options().has_plugins());
1207 parameters->options().plugins()->set_cleanup_handler(handler);
1211 // Add symbols from a plugin-claimed input file.
1213 static enum ld_plugin_status
1214 add_symbols(void* handle, int nsyms, const ld_plugin_symbol* syms)
1216 gold_assert(parameters->options().has_plugins());
1217 Pluginobj* obj = parameters->options().plugins()->make_plugin_object(
1218 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)));
1221 obj->store_incoming_symbols(nsyms, syms);
1225 // Get the input file information with an open (possibly re-opened)
1228 static enum ld_plugin_status
1229 get_input_file(const void* handle, struct ld_plugin_input_file* file)
1231 gold_assert(parameters->options().has_plugins());
1232 unsigned int obj_index =
1233 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle));
1234 return parameters->options().plugins()->get_input_file(obj_index, file);
1237 // Release the input file.
1239 static enum ld_plugin_status
1240 release_input_file(const void* handle)
1242 gold_assert(parameters->options().has_plugins());
1243 unsigned int obj_index =
1244 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle));
1245 return parameters->options().plugins()->release_input_file(obj_index);
1248 // Get the symbol resolution info for a plugin-claimed input file.
1250 static enum ld_plugin_status
1251 get_symbols(const void* handle, int nsyms, ld_plugin_symbol* syms)
1253 gold_assert(parameters->options().has_plugins());
1254 Pluginobj* obj = parameters->options().plugins()->object(
1255 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)));
1258 return obj->get_symbol_resolution_info(nsyms, syms);
1261 // Add a new (real) input file generated by a plugin.
1263 static enum ld_plugin_status
1264 add_input_file(const char* pathname)
1266 gold_assert(parameters->options().has_plugins());
1267 return parameters->options().plugins()->add_input_file(pathname, false);
1270 // Add a new (real) library required by a plugin.
1272 static enum ld_plugin_status
1273 add_input_library(const char* pathname)
1275 gold_assert(parameters->options().has_plugins());
1276 return parameters->options().plugins()->add_input_file(pathname, true);
1279 // Set the extra library path to be used by libraries added via
1280 // add_input_library
1282 static enum ld_plugin_status
1283 set_extra_library_path(const char* path)
1285 gold_assert(parameters->options().has_plugins());
1286 return parameters->options().plugins()->set_extra_library_path(path);
1289 // Issue a diagnostic message from a plugin.
1291 static enum ld_plugin_status
1292 message(int level, const char* format, ...)
1295 va_start(args, format);
1300 parameters->errors()->info(format, args);
1303 parameters->errors()->warning(format, args);
1307 parameters->errors()->error(format, args);
1310 parameters->errors()->fatal(format, args);
1318 #endif // ENABLE_PLUGINS
1320 // Allocate a Pluginobj object of the appropriate size and endianness.
1323 make_sized_plugin_object(Input_file* input_file, off_t offset, off_t filesize)
1325 Pluginobj* obj = NULL;
1327 parameters_force_valid_target();
1328 const Target& target(parameters->target());
1330 if (target.get_size() == 32)
1332 if (target.is_big_endian())
1333 #ifdef HAVE_TARGET_32_BIG
1334 obj = new Sized_pluginobj<32, true>(input_file->filename(),
1335 input_file, offset, filesize);
1337 gold_error(_("%s: not configured to support "
1338 "32-bit big-endian object"),
1339 input_file->filename().c_str());
1342 #ifdef HAVE_TARGET_32_LITTLE
1343 obj = new Sized_pluginobj<32, false>(input_file->filename(),
1344 input_file, offset, filesize);
1346 gold_error(_("%s: not configured to support "
1347 "32-bit little-endian object"),
1348 input_file->filename().c_str());
1351 else if (target.get_size() == 64)
1353 if (target.is_big_endian())
1354 #ifdef HAVE_TARGET_64_BIG
1355 obj = new Sized_pluginobj<64, true>(input_file->filename(),
1356 input_file, offset, filesize);
1358 gold_error(_("%s: not configured to support "
1359 "64-bit big-endian object"),
1360 input_file->filename().c_str());
1363 #ifdef HAVE_TARGET_64_LITTLE
1364 obj = new Sized_pluginobj<64, false>(input_file->filename(),
1365 input_file, offset, filesize);
1367 gold_error(_("%s: not configured to support "
1368 "64-bit little-endian object"),
1369 input_file->filename().c_str());
1373 gold_assert(obj != NULL);
1377 } // End namespace gold.