X-Git-Url: https://oss.titaniummirror.com/gitweb?p=msp430-binutils.git;a=blobdiff_plain;f=gold%2Freadsyms.h;fp=gold%2Freadsyms.h;h=c054b57d7c6c59d405f83a7e5286da8893db2298;hp=0000000000000000000000000000000000000000;hb=88750007d7869f178f0ba528f41efd3b74c424cf;hpb=6df9443a374e2b81278c61b8afc0a1eef7db280b diff --git a/gold/readsyms.h b/gold/readsyms.h new file mode 100644 index 0000000..c054b57 --- /dev/null +++ b/gold/readsyms.h @@ -0,0 +1,298 @@ +// readsyms.h -- read input file symbols for gold -*- C++ -*- + +// Copyright 2006, 2007, 2008 Free Software Foundation, Inc. +// Written by Ian Lance Taylor . + +// 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 + +#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 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)