Subversion Repositories lxp32

/*

 * Copyright (c) 2016 by Alex I. Kuznetsov.

 *

 * Part of the LXP32 CPU IP core.

 *

 * This module defines the Linker class which performs

 * linking of LXP32 binary objects.

 */

#ifndef LINKER_H_INCLUDED

#define LINKER_H_INCLUDED

#include "linkableobject.h"

#include "outputwriter.h"

#include <iostream>

#include <map>

#include <vector>

#include <string>

#include <set>

class Linker {

        struct GlobalSymbolData {

                LinkableObject *obj=nullptr;

                LinkableObject::Word rva=0;

                std::set<const LinkableObject*> refs;

        };

        std::vector<LinkableObject*> _objects;

        LinkableObject *_entryObject=nullptr;

        std::map<std::string,GlobalSymbolData> _globalSymbolTable;

// Various output options

        LinkableObject::Word _base=0;

        std::size_t _align=4;

        std::size_t _imageSize=0;

        std::size_t _bytesWritten=0;

public:

        void addObject(LinkableObject &obj);

        void link(OutputWriter &writer);

        void setBase(LinkableObject::Word base);

        void setAlignment(std::size_t align);

        void setImageSize(std::size_t size);

        void generateMap(std::ostream &s);

private:

        void buildSymbolTable();

        void placeObjects();

        void relocateObject(LinkableObject *obj);

        void writeObjects(OutputWriter &writer);

        void markAsUsed(const LinkableObject *obj,std::set<const LinkableObject*> &used);

};

#endif