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Diffstat (limited to 'binutils-2.25/gold/plugin.cc')
| -rw-r--r-- | binutils-2.25/gold/plugin.cc | 1862 |
1 files changed, 1862 insertions, 0 deletions
diff --git a/binutils-2.25/gold/plugin.cc b/binutils-2.25/gold/plugin.cc new file mode 100644 index 00000000..e932c1c9 --- /dev/null +++ b/binutils-2.25/gold/plugin.cc @@ -0,0 +1,1862 @@ +// plugin.cc -- plugin manager for gold -*- C++ -*- + +// Copyright 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc. +// Written by Cary Coutant <ccoutant@google.com>. + +// This file is part of gold. + +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation; either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, +// MA 02110-1301, USA. + +#include "gold.h" + +#include <cstdio> +#include <cstdarg> +#include <cstring> +#include <string> +#include <vector> + +#ifdef ENABLE_PLUGINS +#ifdef HAVE_DLFCN_H +#include <dlfcn.h> +#elif defined (HAVE_WINDOWS_H) +#include <windows.h> +#else +#error Unknown how to handle dynamic-load-libraries. +#endif + +#if !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) + +#define RTLD_NOW 0 /* Dummy value. */ +static void * +dlopen(const char *file, int mode ATTRIBUTE_UNUSED) +{ + return LoadLibrary(file); +} + +static void * +dlsym(void *handle, const char *name) +{ + return reinterpret_cast<void *>( + GetProcAddress(static_cast<HMODULE>(handle),name)); +} + +static const char * +dlerror(void) +{ + return "unable to load dll"; +} + +#endif /* !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) */ +#endif /* ENABLE_PLUGINS */ + +#include "parameters.h" +#include "errors.h" +#include "fileread.h" +#include "layout.h" +#include "options.h" +#include "plugin.h" +#include "target.h" +#include "readsyms.h" +#include "symtab.h" +#include "descriptors.h" +#include "elfcpp.h" + +namespace gold +{ + +#ifdef ENABLE_PLUGINS + +// The linker's exported interfaces. + +extern "C" +{ + +static enum ld_plugin_status +register_claim_file(ld_plugin_claim_file_handler handler); + +static enum ld_plugin_status +register_all_symbols_read(ld_plugin_all_symbols_read_handler handler); + +static enum ld_plugin_status +register_cleanup(ld_plugin_cleanup_handler handler); + +static enum ld_plugin_status +add_symbols(void *handle, int nsyms, const struct ld_plugin_symbol *syms); + +static enum ld_plugin_status +get_input_file(const void *handle, struct ld_plugin_input_file *file); + +static enum ld_plugin_status +get_view(const void *handle, const void **viewp); + +static enum ld_plugin_status +release_input_file(const void *handle); + +static enum ld_plugin_status +get_symbols(const void *handle, int nsyms, struct ld_plugin_symbol *syms); + +static enum ld_plugin_status +get_symbols_v2(const void *handle, int nsyms, struct ld_plugin_symbol *syms); + +static enum ld_plugin_status +add_input_file(const char *pathname); + +static enum ld_plugin_status +add_input_library(const char *pathname); + +static enum ld_plugin_status +set_extra_library_path(const char *path); + +static enum ld_plugin_status +message(int level, const char *format, ...); + +static enum ld_plugin_status +get_input_section_count(const void* handle, unsigned int* count); + +static enum ld_plugin_status +get_input_section_type(const struct ld_plugin_section section, + unsigned int* type); + +static enum ld_plugin_status +get_input_section_name(const struct ld_plugin_section section, + char** section_name_ptr); + +static enum ld_plugin_status +get_input_section_contents(const struct ld_plugin_section section, + const unsigned char** section_contents, + size_t* len); + +static enum ld_plugin_status +update_section_order(const struct ld_plugin_section *section_list, + unsigned int num_sections); + +static enum ld_plugin_status +allow_section_ordering(); + +static enum ld_plugin_status +allow_unique_segment_for_sections(); + +static enum ld_plugin_status +unique_segment_for_sections(const char* segment_name, + uint64_t flags, + uint64_t align, + const struct ld_plugin_section *section_list, + unsigned int num_sections); +}; + +#endif // ENABLE_PLUGINS + +static Pluginobj* make_sized_plugin_object(Input_file* input_file, + off_t offset, off_t filesize); + +// Plugin methods. + +// Load one plugin library. + +void +Plugin::load() +{ +#ifdef ENABLE_PLUGINS + // Load the plugin library. + // FIXME: Look for the library in standard locations. + this->handle_ = dlopen(this->filename_.c_str(), RTLD_NOW); + if (this->handle_ == NULL) + { + gold_error(_("%s: could not load plugin library: %s"), + this->filename_.c_str(), dlerror()); + return; + } + + // Find the plugin's onload entry point. + void* ptr = dlsym(this->handle_, "onload"); + if (ptr == NULL) + { + gold_error(_("%s: could not find onload entry point"), + this->filename_.c_str()); + return; + } + ld_plugin_onload onload; + gold_assert(sizeof(onload) == sizeof(ptr)); + memcpy(&onload, &ptr, sizeof(ptr)); + + // Get the linker's version number. + const char* ver = get_version_string(); + int major = 0; + int minor = 0; + sscanf(ver, "%d.%d", &major, &minor); + + // Allocate and populate a transfer vector. + const int tv_fixed_size = 26; + + int tv_size = this->args_.size() + tv_fixed_size; + ld_plugin_tv* tv = new ld_plugin_tv[tv_size]; + + // Put LDPT_MESSAGE at the front of the list so the plugin can use it + // while processing subsequent entries. + int i = 0; + tv[i].tv_tag = LDPT_MESSAGE; + tv[i].tv_u.tv_message = message; + + ++i; + tv[i].tv_tag = LDPT_API_VERSION; + tv[i].tv_u.tv_val = LD_PLUGIN_API_VERSION; + + ++i; + tv[i].tv_tag = LDPT_GOLD_VERSION; + tv[i].tv_u.tv_val = major * 100 + minor; + + ++i; + tv[i].tv_tag = LDPT_LINKER_OUTPUT; + if (parameters->options().relocatable()) + tv[i].tv_u.tv_val = LDPO_REL; + else if (parameters->options().shared()) + tv[i].tv_u.tv_val = LDPO_DYN; + else if (parameters->options().pie()) + tv[i].tv_u.tv_val = LDPO_PIE; + else + tv[i].tv_u.tv_val = LDPO_EXEC; + + ++i; + tv[i].tv_tag = LDPT_OUTPUT_NAME; + tv[i].tv_u.tv_string = parameters->options().output(); + + for (unsigned int j = 0; j < this->args_.size(); ++j) + { + ++i; + tv[i].tv_tag = LDPT_OPTION; + tv[i].tv_u.tv_string = this->args_[j].c_str(); + } + + ++i; + tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK; + tv[i].tv_u.tv_register_claim_file = register_claim_file; + + ++i; + tv[i].tv_tag = LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK; + tv[i].tv_u.tv_register_all_symbols_read = register_all_symbols_read; + + ++i; + tv[i].tv_tag = LDPT_REGISTER_CLEANUP_HOOK; + tv[i].tv_u.tv_register_cleanup = register_cleanup; + + ++i; + tv[i].tv_tag = LDPT_ADD_SYMBOLS; + tv[i].tv_u.tv_add_symbols = add_symbols; + + ++i; + tv[i].tv_tag = LDPT_GET_INPUT_FILE; + tv[i].tv_u.tv_get_input_file = get_input_file; + + ++i; + tv[i].tv_tag = LDPT_GET_VIEW; + tv[i].tv_u.tv_get_view = get_view; + + ++i; + tv[i].tv_tag = LDPT_RELEASE_INPUT_FILE; + tv[i].tv_u.tv_release_input_file = release_input_file; + + ++i; + tv[i].tv_tag = LDPT_GET_SYMBOLS; + tv[i].tv_u.tv_get_symbols = get_symbols; + + ++i; + tv[i].tv_tag = LDPT_GET_SYMBOLS_V2; + tv[i].tv_u.tv_get_symbols = get_symbols_v2; + + ++i; + tv[i].tv_tag = LDPT_ADD_INPUT_FILE; + tv[i].tv_u.tv_add_input_file = add_input_file; + + ++i; + tv[i].tv_tag = LDPT_ADD_INPUT_LIBRARY; + tv[i].tv_u.tv_add_input_library = add_input_library; + + ++i; + tv[i].tv_tag = LDPT_SET_EXTRA_LIBRARY_PATH; + tv[i].tv_u.tv_set_extra_library_path = set_extra_library_path; + + ++i; + tv[i].tv_tag = LDPT_GET_INPUT_SECTION_COUNT; + tv[i].tv_u.tv_get_input_section_count = get_input_section_count; + + ++i; + tv[i].tv_tag = LDPT_GET_INPUT_SECTION_TYPE; + tv[i].tv_u.tv_get_input_section_type = get_input_section_type; + + ++i; + tv[i].tv_tag = LDPT_GET_INPUT_SECTION_NAME; + tv[i].tv_u.tv_get_input_section_name = get_input_section_name; + + ++i; + tv[i].tv_tag = LDPT_GET_INPUT_SECTION_CONTENTS; + tv[i].tv_u.tv_get_input_section_contents = get_input_section_contents; + + ++i; + tv[i].tv_tag = LDPT_UPDATE_SECTION_ORDER; + tv[i].tv_u.tv_update_section_order = update_section_order; + + ++i; + tv[i].tv_tag = LDPT_ALLOW_SECTION_ORDERING; + tv[i].tv_u.tv_allow_section_ordering = allow_section_ordering; + + ++i; + tv[i].tv_tag = LDPT_ALLOW_UNIQUE_SEGMENT_FOR_SECTIONS; + tv[i].tv_u.tv_allow_unique_segment_for_sections + = allow_unique_segment_for_sections; + + ++i; + tv[i].tv_tag = LDPT_UNIQUE_SEGMENT_FOR_SECTIONS; + tv[i].tv_u.tv_unique_segment_for_sections = unique_segment_for_sections; + + ++i; + tv[i].tv_tag = LDPT_NULL; + tv[i].tv_u.tv_val = 0; + + gold_assert(i == tv_size - 1); + + // Call the onload entry point. + (*onload)(tv); + + delete[] tv; +#endif // ENABLE_PLUGINS +} + +// Call the plugin claim-file handler. + +inline bool +Plugin::claim_file(struct ld_plugin_input_file* plugin_input_file) +{ + int claimed = 0; + + if (this->claim_file_handler_ != NULL) + { + (*this->claim_file_handler_)(plugin_input_file, &claimed); + if (claimed) + return true; + } + return false; +} + +// Call the all-symbols-read handler. + +inline void +Plugin::all_symbols_read() +{ + if (this->all_symbols_read_handler_ != NULL) + (*this->all_symbols_read_handler_)(); +} + +// Call the cleanup handler. + +inline void +Plugin::cleanup() +{ + if (this->cleanup_handler_ != NULL && !this->cleanup_done_) + { + // Set this flag before calling to prevent a recursive plunge + // in the event that a plugin's cleanup handler issues a + // fatal error. + this->cleanup_done_ = true; + (*this->cleanup_handler_)(); + } +} + +// This task is used to rescan archives as needed. + +class Plugin_rescan : public Task +{ + public: + Plugin_rescan(Task_token* this_blocker, Task_token* next_blocker) + : this_blocker_(this_blocker), next_blocker_(next_blocker) + { } + + ~Plugin_rescan() + { + delete this->this_blocker_; + } + + Task_token* + is_runnable() + { + if (this->this_blocker_->is_blocked()) + return this->this_blocker_; + return NULL; + } + + void + locks(Task_locker* tl) + { tl->add(this, this->next_blocker_); } + + void + run(Workqueue*) + { parameters->options().plugins()->rescan(this); } + + std::string + get_name() const + { return "Plugin_rescan"; } + + private: + Task_token* this_blocker_; + Task_token* next_blocker_; +}; + +// Plugin_manager methods. + +Plugin_manager::~Plugin_manager() +{ + for (Plugin_list::iterator p = this->plugins_.begin(); + p != this->plugins_.end(); + ++p) + delete *p; + this->plugins_.clear(); + for (Object_list::iterator obj = this->objects_.begin(); + obj != this->objects_.end(); + ++obj) + delete *obj; + this->objects_.clear(); +} + +// Load all plugin libraries. + +void +Plugin_manager::load_plugins(Layout* layout) +{ + this->layout_ = layout; + for (this->current_ = this->plugins_.begin(); + this->current_ != this->plugins_.end(); + ++this->current_) + (*this->current_)->load(); +} + +// Call the plugin claim-file handlers in turn to see if any claim the file. + +Pluginobj* +Plugin_manager::claim_file(Input_file* input_file, off_t offset, + off_t filesize, Object* elf_object) +{ + if (this->in_replacement_phase_) + return NULL; + + unsigned int handle = this->objects_.size(); + this->input_file_ = input_file; + this->plugin_input_file_.name = input_file->filename().c_str(); + this->plugin_input_file_.fd = input_file->file().descriptor(); + this->plugin_input_file_.offset = offset; + this->plugin_input_file_.filesize = filesize; + this->plugin_input_file_.handle = reinterpret_cast<void*>(handle); + if (elf_object != NULL) + this->objects_.push_back(elf_object); + this->in_claim_file_handler_ = true; + + for (this->current_ = this->plugins_.begin(); + this->current_ != this->plugins_.end(); + ++this->current_) + { + if ((*this->current_)->claim_file(&this->plugin_input_file_)) + { + this->any_claimed_ = true; + this->in_claim_file_handler_ = false; + + if (this->objects_.size() > handle + && this->objects_[handle]->pluginobj() != NULL) + return this->objects_[handle]->pluginobj(); + + // If the plugin claimed the file but did not call the + // add_symbols callback, we need to create the Pluginobj now. + Pluginobj* obj = this->make_plugin_object(handle); + return obj; + } + } + + this->in_claim_file_handler_ = false; + return NULL; +} + +// Save an archive. This is used so that a plugin can add a file +// which refers to a symbol which was not previously referenced. In +// that case we want to pretend that the symbol was referenced before, +// and pull in the archive object. + +void +Plugin_manager::save_archive(Archive* archive) +{ + if (this->in_replacement_phase_ || !this->any_claimed_) + delete archive; + else + this->rescannable_.push_back(Rescannable(archive)); +} + +// Save an Input_group. This is like save_archive. + +void +Plugin_manager::save_input_group(Input_group* input_group) +{ + if (this->in_replacement_phase_ || !this->any_claimed_) + delete input_group; + else + this->rescannable_.push_back(Rescannable(input_group)); +} + +// Call the all-symbols-read handlers. + +void +Plugin_manager::all_symbols_read(Workqueue* workqueue, Task* task, + Input_objects* input_objects, + Symbol_table* symtab, + Dirsearch* dirpath, Mapfile* mapfile, + Task_token** last_blocker) +{ + this->in_replacement_phase_ = true; + this->workqueue_ = workqueue; + this->task_ = task; + this->input_objects_ = input_objects; + this->symtab_ = symtab; + this->dirpath_ = dirpath; + this->mapfile_ = mapfile; + this->this_blocker_ = NULL; + + for (this->current_ = this->plugins_.begin(); + this->current_ != this->plugins_.end(); + ++this->current_) + (*this->current_)->all_symbols_read(); + + if (this->any_added_) + { + Task_token* next_blocker = new Task_token(true); + next_blocker->add_blocker(); + workqueue->queue(new Plugin_rescan(this->this_blocker_, next_blocker)); + this->this_blocker_ = next_blocker; + } + + *last_blocker = this->this_blocker_; +} + +// This is called when we see a new undefined symbol. If we are in +// the replacement phase, this means that we may need to rescan some +// archives we have previously seen. + +void +Plugin_manager::new_undefined_symbol(Symbol* sym) +{ + if (this->in_replacement_phase_) + this->undefined_symbols_.push_back(sym); +} + +// Rescan archives as needed. This handles the case where a new +// object file added by a plugin has an undefined reference to some +// symbol defined in an archive. + +void +Plugin_manager::rescan(Task* task) +{ + size_t rescan_pos = 0; + size_t rescan_size = this->rescannable_.size(); + while (!this->undefined_symbols_.empty()) + { + if (rescan_pos >= rescan_size) + { + this->undefined_symbols_.clear(); + return; + } + + Undefined_symbol_list undefs; + undefs.reserve(this->undefined_symbols_.size()); + this->undefined_symbols_.swap(undefs); + + size_t min_rescan_pos = rescan_size; + + for (Undefined_symbol_list::const_iterator p = undefs.begin(); + p != undefs.end(); + ++p) + { + if (!(*p)->is_undefined()) + continue; + + this->undefined_symbols_.push_back(*p); + + // Find the first rescan archive which defines this symbol, + // starting at the current rescan position. The rescan position + // exists so that given -la -lb -lc we don't look for undefined + // symbols in -lb back in -la, but instead get the definition + // from -lc. Don't bother to look past the current minimum + // rescan position. + for (size_t i = rescan_pos; i < min_rescan_pos; ++i) + { + if (this->rescannable_defines(i, *p)) + { + min_rescan_pos = i; + break; + } + } + } + + if (min_rescan_pos >= rescan_size) + { + // We didn't find any rescannable archives which define any + // undefined symbols. + return; + } + + const Rescannable& r(this->rescannable_[min_rescan_pos]); + if (r.is_archive) + { + Task_lock_obj<Archive> tl(task, r.u.archive); + r.u.archive->add_symbols(this->symtab_, this->layout_, + this->input_objects_, this->mapfile_); + } + else + { + size_t next_saw_undefined = this->symtab_->saw_undefined(); + size_t saw_undefined; + do + { + saw_undefined = next_saw_undefined; + + for (Input_group::const_iterator p = r.u.input_group->begin(); + p != r.u.input_group->end(); + ++p) + { + Task_lock_obj<Archive> tl(task, *p); + + (*p)->add_symbols(this->symtab_, this->layout_, + this->input_objects_, this->mapfile_); + } + + next_saw_undefined = this->symtab_->saw_undefined(); + } + while (saw_undefined != next_saw_undefined); + } + + for (size_t i = rescan_pos; i < min_rescan_pos + 1; ++i) + { + if (this->rescannable_[i].is_archive) + delete this->rescannable_[i].u.archive; + else + delete this->rescannable_[i].u.input_group; + } + + rescan_pos = min_rescan_pos + 1; + } +} + +// Return whether the rescannable at index I defines SYM. + +bool +Plugin_manager::rescannable_defines(size_t i, Symbol* sym) +{ + const Rescannable& r(this->rescannable_[i]); + if (r.is_archive) + return r.u.archive->defines_symbol(sym); + else + { + for (Input_group::const_iterator p = r.u.input_group->begin(); + p != r.u.input_group->end(); + ++p) + { + if ((*p)->defines_symbol(sym)) + return true; + } + return false; + } +} + +// Layout deferred objects. + +void +Plugin_manager::layout_deferred_objects() +{ + Deferred_layout_list::iterator obj; + + for (obj = this->deferred_layout_objects_.begin(); + obj != this->deferred_layout_objects_.end(); + ++obj) + { + // Lock the object so we can read from it. This is only called + // single-threaded from queue_middle_tasks, so it is OK to lock. + // Unfortunately we have no way to pass in a Task token. + const Task* dummy_task = reinterpret_cast<const Task*>(-1); + Task_lock_obj<Object> tl(dummy_task, *obj); + (*obj)->layout_deferred_sections(this->layout_); + } +} + +// Call the cleanup handlers. + +void +Plugin_manager::cleanup() +{ + if (this->any_added_) + { + // If any input files were added, close all the input files. + // This is because the plugin may want to remove them, and on + // Windows you are not allowed to remove an open file. + close_all_descriptors(); + } + + for (this->current_ = this->plugins_.begin(); + this->current_ != this->plugins_.end(); + ++this->current_) + (*this->current_)->cleanup(); +} + +// Make a new Pluginobj object. This is called when the plugin calls +// the add_symbols API. + +Pluginobj* +Plugin_manager::make_plugin_object(unsigned int handle) +{ + // Make sure we aren't asked to make an object for the same handle twice. + if (this->objects_.size() != handle + && this->objects_[handle]->pluginobj() != NULL) + return NULL; + + Pluginobj* obj = make_sized_plugin_object(this->input_file_, + this->plugin_input_file_.offset, + this->plugin_input_file_.filesize); + + + // If the elf object for this file was pushed into the objects_ vector, delete + // it to make room for the Pluginobj as this file is claimed. + if (this->objects_.size() != handle) + this->objects_.pop_back(); + + this->objects_.push_back(obj); + return obj; +} + +// Get the input file information with an open (possibly re-opened) +// file descriptor. + +ld_plugin_status +Plugin_manager::get_input_file(unsigned int handle, + struct ld_plugin_input_file* file) +{ + Pluginobj* obj = this->object(handle)->pluginobj(); + if (obj == NULL) + return LDPS_BAD_HANDLE; + + obj->lock(this->task_); + file->name = obj->filename().c_str(); + file->fd = obj->descriptor(); + file->offset = obj->offset(); + file->filesize = obj->filesize(); + file->handle = reinterpret_cast<void*>(handle); + return LDPS_OK; +} + +// Release the input file. + +ld_plugin_status +Plugin_manager::release_input_file(unsigned int handle) +{ + if (this->object(handle) == NULL) + return LDPS_BAD_HANDLE; + + Pluginobj* obj = this->object(handle)->pluginobj(); + + if (obj == NULL) + return LDPS_BAD_HANDLE; + + obj->unlock(this->task_); + return LDPS_OK; +} + +// Get the elf object corresponding to the handle. Return NULL if we +// found a Pluginobj instead. + +Object* +Plugin_manager::get_elf_object(const void* handle) +{ + Object* obj = this->object( + static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); + + // The object should not be a Pluginobj. + if (obj == NULL + || obj->pluginobj() != NULL) + return NULL; + + return obj; +} + +ld_plugin_status +Plugin_manager::get_view(unsigned int handle, const void **viewp) +{ + off_t offset; + size_t filesize; + Input_file *input_file; + if (this->in_claim_file_handler_) + { + // We are being called from the claim_file hook. + const struct ld_plugin_input_file &f = this->plugin_input_file_; + offset = f.offset; + filesize = f.filesize; + input_file = this->input_file_; + } + else + { + // An already claimed file. + if (this->object(handle) == NULL) + return LDPS_BAD_HANDLE; + Pluginobj* obj = this->object(handle)->pluginobj(); + if (obj == NULL) + return LDPS_BAD_HANDLE; + offset = obj->offset(); + filesize = obj->filesize(); + input_file = obj->input_file(); + } + *viewp = (void*) input_file->file().get_view(offset, 0, filesize, false, + false); + return LDPS_OK; +} + +// Add a new library path. + +ld_plugin_status +Plugin_manager::set_extra_library_path(const char* path) +{ + this->extra_search_path_ = std::string(path); + return LDPS_OK; +} + +// Add a new input file. + +ld_plugin_status +Plugin_manager::add_input_file(const char* pathname, bool is_lib) +{ + Input_file_argument file(pathname, + (is_lib + ? Input_file_argument::INPUT_FILE_TYPE_LIBRARY + : Input_file_argument::INPUT_FILE_TYPE_FILE), + (is_lib + ? this->extra_search_path_.c_str() + : ""), + false, + this->options_); + Input_argument* input_argument = new Input_argument(file); + Task_token* next_blocker = new Task_token(true); + next_blocker->add_blocker(); + if (parameters->incremental()) + gold_error(_("input files added by plug-ins in --incremental mode not " + "supported yet")); + this->workqueue_->queue_soon(new Read_symbols(this->input_objects_, + this->symtab_, + this->layout_, + this->dirpath_, + 0, + this->mapfile_, + input_argument, + NULL, + NULL, + this->this_blocker_, + next_blocker)); + this->this_blocker_ = next_blocker; + this->any_added_ = true; + return LDPS_OK; +} + +// Class Pluginobj. + +Pluginobj::Pluginobj(const std::string& name, Input_file* input_file, + off_t offset, off_t filesize) + : Object(name, input_file, false, offset), + nsyms_(0), syms_(NULL), symbols_(), filesize_(filesize), comdat_map_() +{ +} + +// Return TRUE if a defined symbol is referenced from outside the +// universe of claimed objects. Only references from relocatable, +// non-IR (unclaimed) objects count as a reference. References from +// dynamic objects count only as "visible". + +static inline bool +is_referenced_from_outside(Symbol* lsym) +{ + if (lsym->in_real_elf()) + return true; + if (parameters->options().relocatable()) + return true; + if (parameters->options().is_undefined(lsym->name())) + return true; + return false; +} + +// Return TRUE if a defined symbol might be reachable from outside the +// load module. + +static inline bool +is_visible_from_outside(Symbol* lsym) +{ + if (lsym->in_dyn()) + return true; + if (parameters->options().export_dynamic() || parameters->options().shared()) + return lsym->is_externally_visible(); + return false; +} + +// Get symbol resolution info. + +ld_plugin_status +Pluginobj::get_symbol_resolution_info(int nsyms, + ld_plugin_symbol* syms, + int version) const +{ + // For version 1 of this interface, we cannot use + // LDPR_PREVAILING_DEF_IRONLY_EXP, so we return LDPR_PREVAILING_DEF + // instead. + const ld_plugin_symbol_resolution ldpr_prevailing_def_ironly_exp + = (version > 1 + ? LDPR_PREVAILING_DEF_IRONLY_EXP + : LDPR_PREVAILING_DEF); + + if (nsyms > this->nsyms_) + return LDPS_NO_SYMS; + + if (static_cast<size_t>(nsyms) > this->symbols_.size()) + { + // We never decided to include this object. We mark all symbols as + // preempted. + gold_assert(this->symbols_.size() == 0); + for (int i = 0; i < nsyms; i++) + syms[i].resolution = LDPR_PREEMPTED_REG; + return LDPS_OK; + } + + for (int i = 0; i < nsyms; i++) + { + ld_plugin_symbol* isym = &syms[i]; + Symbol* lsym = this->symbols_[i]; + ld_plugin_symbol_resolution res = LDPR_UNKNOWN; + + if (lsym->is_undefined()) + // The symbol remains undefined. + res = LDPR_UNDEF; + else if (isym->def == LDPK_UNDEF + || isym->def == LDPK_WEAKUNDEF + || isym->def == LDPK_COMMON) + { + // The original symbol was undefined or common. + if (lsym->source() != Symbol::FROM_OBJECT) + res = LDPR_RESOLVED_EXEC; + else if (lsym->object()->pluginobj() == this) + { + if (is_referenced_from_outside(lsym)) + res = LDPR_PREVAILING_DEF; + else if (is_visible_from_outside(lsym)) + res = ldpr_prevailing_def_ironly_exp; + else + res = LDPR_PREVAILING_DEF_IRONLY; + } + else if (lsym->object()->pluginobj() != NULL) + res = LDPR_RESOLVED_IR; + else if (lsym->object()->is_dynamic()) + res = LDPR_RESOLVED_DYN; + else + res = LDPR_RESOLVED_EXEC; + } + else + { + // The original symbol was a definition. + if (lsym->source() != Symbol::FROM_OBJECT) + res = LDPR_PREEMPTED_REG; + else if (lsym->object() == static_cast<const Object*>(this)) + { + if (is_referenced_from_outside(lsym)) + res = LDPR_PREVAILING_DEF; + else if (is_visible_from_outside(lsym)) + res = ldpr_prevailing_def_ironly_exp; + else + res = LDPR_PREVAILING_DEF_IRONLY; + } + else + res = (lsym->object()->pluginobj() != NULL + ? LDPR_PREEMPTED_IR + : LDPR_PREEMPTED_REG); + } + isym->resolution = res; + } + return LDPS_OK; +} + +// Return TRUE if the comdat group with key COMDAT_KEY from this object +// should be kept. + +bool +Pluginobj::include_comdat_group(std::string comdat_key, Layout* layout) +{ + std::pair<Comdat_map::iterator, bool> ins = + this->comdat_map_.insert(std::make_pair(comdat_key, false)); + + // If this is the first time we've seen this comdat key, ask the + // layout object whether it should be included. + if (ins.second) + ins.first->second = layout->find_or_add_kept_section(comdat_key, + NULL, 0, true, + true, NULL); + + return ins.first->second; +} + +// Class Sized_pluginobj. + +template<int size, bool big_endian> +Sized_pluginobj<size, big_endian>::Sized_pluginobj( + const std::string& name, + Input_file* input_file, + off_t offset, + off_t filesize) + : Pluginobj(name, input_file, offset, filesize) +{ +} + +// Read the symbols. Not used for plugin objects. + +template<int size, bool big_endian> +void +Sized_pluginobj<size, big_endian>::do_read_symbols(Read_symbols_data*) +{ + gold_unreachable(); +} + +// Lay out the input sections. Not used for plugin objects. + +template<int size, bool big_endian> +void +Sized_pluginobj<size, big_endian>::do_layout(Symbol_table*, Layout*, + Read_symbols_data*) +{ + gold_unreachable(); +} + +// Add the symbols to the symbol table. + +template<int size, bool big_endian> +void +Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table* symtab, + Read_symbols_data*, + Layout* layout) +{ + const int sym_size = elfcpp::Elf_sizes<size>::sym_size; + unsigned char symbuf[sym_size]; + elfcpp::Sym<size, big_endian> sym(symbuf); + elfcpp::Sym_write<size, big_endian> osym(symbuf); + + typedef typename elfcpp::Elf_types<size>::Elf_WXword Elf_size_type; + + this->symbols_.resize(this->nsyms_); + + for (int i = 0; i < this->nsyms_; ++i) + { + const struct ld_plugin_symbol* isym = &this->syms_[i]; + const char* name = isym->name; + const char* ver = isym->version; + elfcpp::Elf_Half shndx; + elfcpp::STB bind; + elfcpp::STV vis; + + if (name != NULL && name[0] == '\0') + name = NULL; + if (ver != NULL && ver[0] == '\0') + ver = NULL; + + switch (isym->def) + { + case LDPK_WEAKDEF: + case LDPK_WEAKUNDEF: + bind = elfcpp::STB_WEAK; + break; + case LDPK_DEF: + case LDPK_UNDEF: + case LDPK_COMMON: + default: + bind = elfcpp::STB_GLOBAL; + break; + } + + switch (isym->def) + { + case LDPK_DEF: + case LDPK_WEAKDEF: + shndx = elfcpp::SHN_ABS; + break; + case LDPK_COMMON: + shndx = elfcpp::SHN_COMMON; + break; + case LDPK_UNDEF: + case LDPK_WEAKUNDEF: + default: + shndx = elfcpp::SHN_UNDEF; + break; + } + + switch (isym->visibility) + { + case LDPV_PROTECTED: + vis = elfcpp::STV_PROTECTED; + break; + case LDPV_INTERNAL: + vis = elfcpp::STV_INTERNAL; + break; + case LDPV_HIDDEN: + vis = elfcpp::STV_HIDDEN; + break; + case LDPV_DEFAULT: + default: + vis = elfcpp::STV_DEFAULT; + break; + } + + if (isym->comdat_key != NULL + && isym->comdat_key[0] != '\0' + && !this->include_comdat_group(isym->comdat_key, layout)) + shndx = elfcpp::SHN_UNDEF; + + osym.put_st_name(0); + osym.put_st_value(0); + osym.put_st_size(static_cast<Elf_size_type>(isym->size)); + osym.put_st_info(bind, elfcpp::STT_NOTYPE); + osym.put_st_other(vis, 0); + osym.put_st_shndx(shndx); + + this->symbols_[i] = + symtab->add_from_pluginobj<size, big_endian>(this, name, ver, &sym); + } +} + +template<int size, bool big_endian> +Archive::Should_include +Sized_pluginobj<size, big_endian>::do_should_include_member( + Symbol_table* symtab, + Layout* layout, + Read_symbols_data*, + std::string* why) +{ + char* tmpbuf = NULL; + size_t tmpbuflen = 0; + + for (int i = 0; i < this->nsyms_; ++i) + { + const struct ld_plugin_symbol& sym = this->syms_[i]; + const char* name = sym.name; + Symbol* symbol; + Archive::Should_include t = Archive::should_include_member(symtab, + layout, + name, + &symbol, why, + &tmpbuf, + &tmpbuflen); + if (t == Archive::SHOULD_INCLUDE_YES) + { + if (tmpbuf != NULL) + free(tmpbuf); + return t; + } + } + if (tmpbuf != NULL) + free(tmpbuf); + return Archive::SHOULD_INCLUDE_UNKNOWN; +} + +// Iterate over global symbols, calling a visitor class V for each. + +template<int size, bool big_endian> +void +Sized_pluginobj<size, big_endian>::do_for_all_global_symbols( + Read_symbols_data*, + Library_base::Symbol_visitor_base* v) +{ + for (int i = 0; i < this->nsyms_; ++i) + { + const struct ld_plugin_symbol& sym = this->syms_[i]; + if (sym.def != LDPK_UNDEF) + v->visit(sym.name); + } +} + +// Iterate over local symbols, calling a visitor class V for each GOT offset +// associated with a local symbol. +template<int size, bool big_endian> +void +Sized_pluginobj<size, big_endian>::do_for_all_local_got_entries( + Got_offset_list::Visitor*) const +{ + gold_unreachable(); +} + +// Get the size of a section. Not used for plugin objects. + +template<int size, bool big_endian> +uint64_t +Sized_pluginobj<size, big_endian>::do_section_size(unsigned int) +{ + gold_unreachable(); + return 0; +} + +// Get the name of a section. Not used for plugin objects. + +template<int size, bool big_endian> +std::string +Sized_pluginobj<size, big_endian>::do_section_name(unsigned int) +{ + gold_unreachable(); + return std::string(); +} + +// Return a view of the contents of a section. Not used for plugin objects. + +template<int size, bool big_endian> +const unsigned char* +Sized_pluginobj<size, big_endian>::do_section_contents( + unsigned int, + section_size_type*, + bool) +{ + gold_unreachable(); + return NULL; +} + +// Return section flags. Not used for plugin objects. + +template<int size, bool big_endian> +uint64_t +Sized_pluginobj<size, big_endian>::do_section_flags(unsigned int) +{ + gold_unreachable(); + return 0; +} + +// Return section entsize. Not used for plugin objects. + +template<int size, bool big_endian> +uint64_t +Sized_pluginobj<size, big_endian>::do_section_entsize(unsigned int) +{ + gold_unreachable(); + return 0; +} + +// Return section address. Not used for plugin objects. + +template<int size, bool big_endian> +uint64_t +Sized_pluginobj<size, big_endian>::do_section_address(unsigned int) +{ + gold_unreachable(); + return 0; +} + +// Return section type. Not used for plugin objects. + +template<int size, bool big_endian> +unsigned int +Sized_pluginobj<size, big_endian>::do_section_type(unsigned int) +{ + gold_unreachable(); + return 0; +} + +// Return the section link field. Not used for plugin objects. + +template<int size, bool big_endian> +unsigned int +Sized_pluginobj<size, big_endian>::do_section_link(unsigned int) +{ + gold_unreachable(); + return 0; +} + +// Return the section link field. Not used for plugin objects. + +template<int size, bool big_endian> +unsigned int +Sized_pluginobj<size, big_endian>::do_section_info(unsigned int) +{ + gold_unreachable(); + return 0; +} + +// Return the section alignment. Not used for plugin objects. + +template<int size, bool big_endian> +uint64_t +Sized_pluginobj<size, big_endian>::do_section_addralign(unsigned int) +{ + gold_unreachable(); + return 0; +} + +// Return the Xindex structure to use. Not used for plugin objects. + +template<int size, bool big_endian> +Xindex* +Sized_pluginobj<size, big_endian>::do_initialize_xindex() +{ + gold_unreachable(); + return NULL; +} + +// Get symbol counts. Don't count plugin objects; the replacement +// files will provide the counts. + +template<int size, bool big_endian> +void +Sized_pluginobj<size, big_endian>::do_get_global_symbol_counts( + const Symbol_table*, + size_t* defined, + size_t* used) const +{ + *defined = 0; + *used = 0; +} + +// Get symbols. Not used for plugin objects. + +template<int size, bool big_endian> +const Object::Symbols* +Sized_pluginobj<size, big_endian>::do_get_global_symbols() const +{ + gold_unreachable(); +} + +// Class Plugin_finish. This task runs after all replacement files have +// been added. For now, it's a placeholder for a possible plugin API +// to allow the plugin to release most of its resources. The cleanup +// handlers must be called later, because they can remove the temporary +// object files that are needed until the end of the link. + +class Plugin_finish : public Task +{ + public: + Plugin_finish(Task_token* this_blocker, Task_token* next_blocker) + : this_blocker_(this_blocker), next_blocker_(next_blocker) + { } + + ~Plugin_finish() + { + if (this->this_blocker_ != NULL) + delete this->this_blocker_; + } + + Task_token* + is_runnable() + { + if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) + return this->this_blocker_; + return NULL; + } + + void + locks(Task_locker* tl) + { tl->add(this, this->next_blocker_); } + + void + run(Workqueue*) + { + // We could call early cleanup handlers here. + } + + std::string + get_name() const + { return "Plugin_finish"; } + + private: + Task_token* this_blocker_; + Task_token* next_blocker_; +}; + +// Class Plugin_hook. + +Plugin_hook::~Plugin_hook() +{ +} + +// Return whether a Plugin_hook task is runnable. + +Task_token* +Plugin_hook::is_runnable() +{ + if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) + return this->this_blocker_; + return NULL; +} + +// Return a Task_locker for a Plugin_hook task. We don't need any +// locks here. + +void +Plugin_hook::locks(Task_locker*) +{ +} + +// Run the "all symbols read" plugin hook. + +void +Plugin_hook::run(Workqueue* workqueue) +{ + gold_assert(this->options_.has_plugins()); + Symbol* start_sym = this->symtab_->lookup(parameters->entry()); + if (start_sym != NULL) + start_sym->set_in_real_elf(); + + this->options_.plugins()->all_symbols_read(workqueue, + this, + this->input_objects_, + this->symtab_, + this->dirpath_, + this->mapfile_, + &this->this_blocker_); + workqueue->queue_soon(new Plugin_finish(this->this_blocker_, + this->next_blocker_)); +} + +// The C interface routines called by the plugins. + +#ifdef ENABLE_PLUGINS + +// Register a claim-file handler. + +static enum ld_plugin_status +register_claim_file(ld_plugin_claim_file_handler handler) +{ + gold_assert(parameters->options().has_plugins()); + parameters->options().plugins()->set_claim_file_handler(handler); + return LDPS_OK; +} + +// Register an all-symbols-read handler. + +static enum ld_plugin_status +register_all_symbols_read(ld_plugin_all_symbols_read_handler handler) +{ + gold_assert(parameters->options().has_plugins()); + parameters->options().plugins()->set_all_symbols_read_handler(handler); + return LDPS_OK; +} + +// Register a cleanup handler. + +static enum ld_plugin_status +register_cleanup(ld_plugin_cleanup_handler handler) +{ + gold_assert(parameters->options().has_plugins()); + parameters->options().plugins()->set_cleanup_handler(handler); + return LDPS_OK; +} + +// Add symbols from a plugin-claimed input file. + +static enum ld_plugin_status +add_symbols(void* handle, int nsyms, const ld_plugin_symbol* syms) +{ + gold_assert(parameters->options().has_plugins()); + Pluginobj* obj = parameters->options().plugins()->make_plugin_object( + static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); + if (obj == NULL) + return LDPS_ERR; + obj->store_incoming_symbols(nsyms, syms); + return LDPS_OK; +} + +// Get the input file information with an open (possibly re-opened) +// file descriptor. + +static enum ld_plugin_status +get_input_file(const void* handle, struct ld_plugin_input_file* file) +{ + gold_assert(parameters->options().has_plugins()); + unsigned int obj_index = + static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); + return parameters->options().plugins()->get_input_file(obj_index, file); +} + +// Release the input file. + +static enum ld_plugin_status +release_input_file(const void* handle) +{ + gold_assert(parameters->options().has_plugins()); + unsigned int obj_index = + static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); + return parameters->options().plugins()->release_input_file(obj_index); +} + +static enum ld_plugin_status +get_view(const void *handle, const void **viewp) +{ + gold_assert(parameters->options().has_plugins()); + unsigned int obj_index = + static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)); + return parameters->options().plugins()->get_view(obj_index, viewp); +} + +// Get the symbol resolution info for a plugin-claimed input file. + +static enum ld_plugin_status +get_symbols(const void* handle, int nsyms, ld_plugin_symbol* syms) +{ + gold_assert(parameters->options().has_plugins()); + Object* obj = parameters->options().plugins()->object( + static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); + if (obj == NULL) + return LDPS_ERR; + Pluginobj* plugin_obj = obj->pluginobj(); + if (plugin_obj == NULL) + return LDPS_ERR; + return plugin_obj->get_symbol_resolution_info(nsyms, syms, 1); +} + +// Version 2 of the above. The only difference is that this version +// is allowed to return the resolution code LDPR_PREVAILING_DEF_IRONLY_EXP. + +static enum ld_plugin_status +get_symbols_v2(const void* handle, int nsyms, ld_plugin_symbol* syms) +{ + gold_assert(parameters->options().has_plugins()); + Object* obj = parameters->options().plugins()->object( + static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle))); + if (obj == NULL) + return LDPS_ERR; + Pluginobj* plugin_obj = obj->pluginobj(); + if (plugin_obj == NULL) + return LDPS_ERR; + return plugin_obj->get_symbol_resolution_info(nsyms, syms, 2); +} + +// Add a new (real) input file generated by a plugin. + +static enum ld_plugin_status +add_input_file(const char* pathname) +{ + gold_assert(parameters->options().has_plugins()); + return parameters->options().plugins()->add_input_file(pathname, false); +} + +// Add a new (real) library required by a plugin. + +static enum ld_plugin_status +add_input_library(const char* pathname) +{ + gold_assert(parameters->options().has_plugins()); + return parameters->options().plugins()->add_input_file(pathname, true); +} + +// Set the extra library path to be used by libraries added via +// add_input_library + +static enum ld_plugin_status +set_extra_library_path(const char* path) +{ + gold_assert(parameters->options().has_plugins()); + return parameters->options().plugins()->set_extra_library_path(path); +} + +// Issue a diagnostic message from a plugin. + +static enum ld_plugin_status +message(int level, const char* format, ...) +{ + va_list args; + va_start(args, format); + + switch (level) + { + case LDPL_INFO: + parameters->errors()->info(format, args); + break; + case LDPL_WARNING: + parameters->errors()->warning(format, args); + break; + case LDPL_ERROR: + default: + parameters->errors()->error(format, args); + break; + case LDPL_FATAL: + parameters->errors()->fatal(format, args); + break; + } + + va_end(args); + return LDPS_OK; +} + +// Get the section count of the object corresponding to the handle. This +// plugin interface can only be called in the claim_file handler of the plugin. + +static enum ld_plugin_status +get_input_section_count(const void* handle, unsigned int* count) +{ + gold_assert(parameters->options().has_plugins()); + + if (!parameters->options().plugins()->in_claim_file_handler()) + return LDPS_ERR; + + Object* obj = parameters->options().plugins()->get_elf_object(handle); + + if (obj == NULL) + return LDPS_ERR; + + *count = obj->shnum(); + return LDPS_OK; +} + +// Get the type of the specified section in the object corresponding +// to the handle. This plugin interface can only be called in the +// claim_file handler of the plugin. + +static enum ld_plugin_status +get_input_section_type(const struct ld_plugin_section section, + unsigned int* type) +{ + gold_assert(parameters->options().has_plugins()); + + if (!parameters->options().plugins()->in_claim_file_handler()) + return LDPS_ERR; + + Object* obj + = parameters->options().plugins()->get_elf_object(section.handle); + + if (obj == NULL) + return LDPS_BAD_HANDLE; + + *type = obj->section_type(section.shndx); + return LDPS_OK; +} + +// Get the name of the specified section in the object corresponding +// to the handle. This plugin interface can only be called in the +// claim_file handler of the plugin. + +static enum ld_plugin_status +get_input_section_name(const struct ld_plugin_section section, + char** section_name_ptr) +{ + gold_assert(parameters->options().has_plugins()); + + if (!parameters->options().plugins()->in_claim_file_handler()) + return LDPS_ERR; + + Object* obj + = parameters->options().plugins()->get_elf_object(section.handle); + + if (obj == NULL) + return LDPS_BAD_HANDLE; + + // Check if the object is locked before getting the section name. + gold_assert(obj->is_locked()); + + const std::string section_name = obj->section_name(section.shndx); + *section_name_ptr = static_cast<char*>(malloc(section_name.length() + 1)); + memcpy(*section_name_ptr, section_name.c_str(), section_name.length() + 1); + return LDPS_OK; +} + +// Get the contents of the specified section in the object corresponding +// to the handle. This plugin interface can only be called in the +// claim_file handler of the plugin. + +static enum ld_plugin_status +get_input_section_contents(const struct ld_plugin_section section, + const unsigned char** section_contents_ptr, + size_t* len) +{ + gold_assert(parameters->options().has_plugins()); + + if (!parameters->options().plugins()->in_claim_file_handler()) + return LDPS_ERR; + + Object* obj + = parameters->options().plugins()->get_elf_object(section.handle); + + if (obj == NULL) + return LDPS_BAD_HANDLE; + + // Check if the object is locked before getting the section contents. + gold_assert(obj->is_locked()); + + section_size_type plen; + *section_contents_ptr + = obj->section_contents(section.shndx, &plen, false); + *len = plen; + return LDPS_OK; +} + +// Specify the ordering of sections in the final layout. The sections are +// specified as (handle,shndx) pairs in the two arrays in the order in +// which they should appear in the final layout. + +static enum ld_plugin_status +update_section_order(const struct ld_plugin_section* section_list, + unsigned int num_sections) +{ + gold_assert(parameters->options().has_plugins()); + + if (num_sections == 0) + return LDPS_OK; + + if (section_list == NULL) + return LDPS_ERR; + + Layout* layout = parameters->options().plugins()->layout(); + gold_assert (layout != NULL); + + std::map<Section_id, unsigned int>* order_map + = layout->get_section_order_map(); + + /* Store the mapping from Section_id to section position in layout's + order_map to consult after output sections are added. */ + for (unsigned int i = 0; i < num_sections; ++i) + { + Object* obj = parameters->options().plugins()->get_elf_object( + section_list[i].handle); + if (obj == NULL) + return LDPS_BAD_HANDLE; + unsigned int shndx = section_list[i].shndx; + Section_id secn_id(obj, shndx); + (*order_map)[secn_id] = i + 1; + } + + return LDPS_OK; +} + +// Let the linker know that the sections could be reordered. + +static enum ld_plugin_status +allow_section_ordering() +{ + gold_assert(parameters->options().has_plugins()); + Layout* layout = parameters->options().plugins()->layout(); + layout->set_section_ordering_specified(); + return LDPS_OK; +} + +// Let the linker know that a subset of sections could be mapped +// to a unique segment. + +static enum ld_plugin_status +allow_unique_segment_for_sections() +{ + gold_assert(parameters->options().has_plugins()); + Layout* layout = parameters->options().plugins()->layout(); + layout->set_unique_segment_for_sections_specified(); + return LDPS_OK; +} + +// This function should map the list of sections specified in the +// SECTION_LIST to a unique segment. ELF segments do not have names +// and the NAME is used to identify Output Section which should contain +// the list of sections. This Output Section will then be mapped to +// a unique segment. FLAGS is used to specify if any additional segment +// flags need to be set. For instance, a specific segment flag can be +// set to identify this segment. Unsetting segment flags is not possible. +// ALIGN specifies the alignment of the segment. + +static enum ld_plugin_status +unique_segment_for_sections(const char* segment_name, + uint64_t flags, + uint64_t align, + const struct ld_plugin_section* section_list, + unsigned int num_sections) +{ + gold_assert(parameters->options().has_plugins()); + + if (num_sections == 0) + return LDPS_OK; + + if (section_list == NULL) + return LDPS_ERR; + + Layout* layout = parameters->options().plugins()->layout(); + gold_assert (layout != NULL); + + Layout::Unique_segment_info* s = new Layout::Unique_segment_info; + s->name = segment_name; + s->flags = flags; + s->align = align; + + for (unsigned int i = 0; i < num_sections; ++i) + { + Object* obj = parameters->options().plugins()->get_elf_object( + section_list[i].handle); + if (obj == NULL) + return LDPS_BAD_HANDLE; + unsigned int shndx = section_list[i].shndx; + Const_section_id secn_id(obj, shndx); + layout->insert_section_segment_map(secn_id, s); + } + + return LDPS_OK; +} + +#endif // ENABLE_PLUGINS + +// Allocate a Pluginobj object of the appropriate size and endianness. + +static Pluginobj* +make_sized_plugin_object(Input_file* input_file, off_t offset, off_t filesize) +{ + Pluginobj* obj = NULL; + + parameters_force_valid_target(); + const Target& target(parameters->target()); + + if (target.get_size() == 32) + { + if (target.is_big_endian()) +#ifdef HAVE_TARGET_32_BIG + obj = new Sized_pluginobj<32, true>(input_file->filename(), + input_file, offset, filesize); +#else + gold_error(_("%s: not configured to support " + "32-bit big-endian object"), + input_file->filename().c_str()); +#endif + else +#ifdef HAVE_TARGET_32_LITTLE + obj = new Sized_pluginobj<32, false>(input_file->filename(), + input_file, offset, filesize); +#else + gold_error(_("%s: not configured to support " + "32-bit little-endian object"), + input_file->filename().c_str()); +#endif + } + else if (target.get_size() == 64) + { + if (target.is_big_endian()) +#ifdef HAVE_TARGET_64_BIG + obj = new Sized_pluginobj<64, true>(input_file->filename(), + input_file, offset, filesize); +#else + gold_error(_("%s: not configured to support " + "64-bit big-endian object"), + input_file->filename().c_str()); +#endif + else +#ifdef HAVE_TARGET_64_LITTLE + obj = new Sized_pluginobj<64, false>(input_file->filename(), + input_file, offset, filesize); +#else + gold_error(_("%s: not configured to support " + "64-bit little-endian object"), + input_file->filename().c_str()); +#endif + } + + gold_assert(obj != NULL); + return obj; +} + +} // End namespace gold. |