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[/] [openrisc/] [trunk/] [gnu-src/] [binutils-2.20.1/] [gold/] [readsyms.h] - Rev 410
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// readsyms.h -- read input file symbols for gold -*- C++ -*- // Copyright 2006, 2007, 2008 Free Software Foundation, Inc. // Written by Ian Lance Taylor <iant@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. #ifndef GOLD_READSYMS_H #define GOLD_READSYMS_H #include <vector> #include "workqueue.h" #include "object.h" namespace gold { class Input_objects; class Symbol_table; class Input_group; class Archive; // This Task is responsible for reading the symbols from an input // file. This also includes reading the relocations so that we can // check for any that require a PLT and/or a GOT. After the data has // been read, this queues up another task to actually add the symbols // to the symbol table. The tasks are separated because the file // reading can occur in parallel but adding the symbols must be done // in the order of the input files. class Read_symbols : public Task { public: // DIRPATH is the list of directories to search for libraries. // INPUT is the file to read. INPUT_GROUP is not NULL if we are in // the middle of an input group. THIS_BLOCKER is used to prevent // the associated Add_symbols task from running before the previous // one has completed; it will be NULL for the first task. // NEXT_BLOCKER is used to block the next input file from adding // symbols. Read_symbols(Input_objects* input_objects, Symbol_table* symtab, Layout* layout, Dirsearch* dirpath, int dirindex, Mapfile* mapfile, const Input_argument* input_argument, Input_group* input_group, Task_token* this_blocker, Task_token* next_blocker) : input_objects_(input_objects), symtab_(symtab), layout_(layout), dirpath_(dirpath), dirindex_(dirindex), mapfile_(mapfile), input_argument_(input_argument), input_group_(input_group), this_blocker_(this_blocker), next_blocker_(next_blocker) { } ~Read_symbols(); // If appropriate, issue a warning about skipping an incompatible // object. static void incompatible_warning(const Input_argument*, const Input_file*); // Requeue a Read_symbols task to search for the next object with // the same name. static void requeue(Workqueue*, Input_objects*, Symbol_table*, Layout*, Dirsearch*, int dirindex, Mapfile*, const Input_argument*, Input_group*, Task_token* next_blocker); // The standard Task methods. Task_token* is_runnable(); void locks(Task_locker*); void run(Workqueue*); std::string get_name() const; private: // Handle an archive group. void do_group(Workqueue*); // Open and identify the file. bool do_read_symbols(Workqueue*); Input_objects* input_objects_; Symbol_table* symtab_; Layout* layout_; Dirsearch* dirpath_; int dirindex_; Mapfile* mapfile_; const Input_argument* input_argument_; Input_group* input_group_; Task_token* this_blocker_; Task_token* next_blocker_; }; // This Task handles adding the symbols to the symbol table. These // tasks must be run in the same order as the arguments appear on the // command line. class Add_symbols : public Task { public: // THIS_BLOCKER is used to prevent this task from running before the // one for the previous input file. NEXT_BLOCKER is used to prevent // the next task from running. Add_symbols(Input_objects* input_objects, Symbol_table* symtab, Layout* layout, Dirsearch* dirpath, int dirindex, Mapfile* mapfile, const Input_argument* input_argument, Input_group* input_group, Object* object, Read_symbols_data* sd, Task_token* this_blocker, Task_token* next_blocker) : input_objects_(input_objects), symtab_(symtab), layout_(layout), dirpath_(dirpath), dirindex_(dirindex), mapfile_(mapfile), input_argument_(input_argument), input_group_(input_group), object_(object), sd_(sd), this_blocker_(this_blocker), next_blocker_(next_blocker) { } ~Add_symbols(); // The standard Task methods. Task_token* is_runnable(); void locks(Task_locker*); void run(Workqueue*); std::string get_name() const { return "Add_symbols " + this->object_->name(); } private: Input_objects* input_objects_; Symbol_table* symtab_; Layout* layout_; Dirsearch* dirpath_; int dirindex_; Mapfile* mapfile_; const Input_argument* input_argument_; Input_group* input_group_; Object* object_; Read_symbols_data* sd_; Task_token* this_blocker_; Task_token* next_blocker_; }; // This class is used to track the archives in a group. class Input_group { public: typedef std::vector<Archive*> Archives; typedef Archives::const_iterator const_iterator; Input_group() : archives_() { } // Add an archive to the group. void add_archive(Archive* arch) { this->archives_.push_back(arch); } // Loop over the archives in the group. const_iterator begin() const { return this->archives_.begin(); } const_iterator end() const { return this->archives_.end(); } private: Archives archives_; }; // This class is used to finish up handling a group. It is just a // closure. class Finish_group : public Task { public: Finish_group(Input_objects* input_objects, Symbol_table* symtab, Layout* layout, Mapfile* mapfile, Input_group* input_group, int saw_undefined, Task_token* this_blocker, Task_token* next_blocker) : input_objects_(input_objects), symtab_(symtab), layout_(layout), mapfile_(mapfile), input_group_(input_group), saw_undefined_(saw_undefined), this_blocker_(this_blocker), next_blocker_(next_blocker) { } ~Finish_group(); // The standard Task methods. Task_token* is_runnable(); void locks(Task_locker*); void run(Workqueue*); std::string get_name() const { return "Finish_group"; } private: Input_objects* input_objects_; Symbol_table* symtab_; Layout* layout_; Mapfile* mapfile_; Input_group* input_group_; int saw_undefined_; Task_token* this_blocker_; Task_token* next_blocker_; }; // This class is used to read a file which was not recognized as an // object or archive. It tries to read it as a linker script, using // the tokens to serialize with the calls to Add_symbols. class Read_script : public Task { public: Read_script(Symbol_table* symtab, Layout* layout, Dirsearch* dirpath, int dirindex, Input_objects* input_objects, Mapfile* mapfile, Input_group* input_group, const Input_argument* input_argument, Input_file* input_file, Task_token* this_blocker, Task_token* next_blocker) : symtab_(symtab), layout_(layout), dirpath_(dirpath), dirindex_(dirindex), input_objects_(input_objects), mapfile_(mapfile), input_group_(input_group), input_argument_(input_argument), input_file_(input_file), this_blocker_(this_blocker), next_blocker_(next_blocker) { } ~Read_script(); // The standard Task methods. Task_token* is_runnable(); void locks(Task_locker*); void run(Workqueue*); std::string get_name() const; private: Symbol_table* symtab_; Layout* layout_; Dirsearch* dirpath_; int dirindex_; Input_objects* input_objects_; Mapfile* mapfile_; Input_group* input_group_; const Input_argument* input_argument_; Input_file* input_file_; Task_token* this_blocker_; Task_token* next_blocker_; }; } // end namespace gold #endif // !defined(GOLD_READSYMS_H)
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