--- /dev/null
+// 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)
projects / msp430-binutils.git / blobdiff