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// freebsd.h -- FreeBSD support for gold    -*- C++ -*-

// Copyright 2009, 2011 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.

#include "target.h"

#include "target-select.h"

#ifndef GOLD_FREEBSD_H

#define GOLD_FREEBSD_H

namespace gold

{

// FreeBSD 4.1 and later wants the EI_OSABI field in the ELF header to

// be set to ELFOSABI_FREEBSD.  This is a target selector for targets

// which permit combining both FreeBSD and non-FreeBSD object files.

class Target_selector_freebsd : public Target_selector

{

 public:

  Target_selector_freebsd(int machine, int size, bool is_big_endian,

                          const char* bfd_name,

                          const char* freebsd_bfd_name,

                          const char* emulation)

    : Target_selector(machine, size, is_big_endian, NULL, emulation),

      bfd_name_(bfd_name), freebsd_bfd_name_(freebsd_bfd_name)

  { }

 protected:

  // If we see a FreeBSD input file, mark the output file as using

  // FreeBSD.

  virtual Target*

  do_recognize(int, int osabi, int)

  {

    Target* ret = this->instantiate_target();

    if (osabi == elfcpp::ELFOSABI_FREEBSD)

      ret->set_osabi(static_cast<elfcpp::ELFOSABI>(osabi));

    return ret;

  }

  // Recognize two names.

  virtual Target*

  do_recognize_by_bfd_name(const char* name)

  {

    if (strcmp(name, this->bfd_name_) == 0)

      return this->instantiate_target();

    else if (strcmp(name, this->freebsd_bfd_name_) == 0)

      {

        Target* ret = this->instantiate_target();

        ret->set_osabi(elfcpp::ELFOSABI_FREEBSD);

        return ret;

      }

    else

      return NULL;

  }

  // Print both names in --help output.

  virtual void

  do_supported_bfd_names(std::vector<const char*>* names)

  {

    names->push_back(this->bfd_name_);

    names->push_back(this->freebsd_bfd_name_);

  }

  // Return appropriate BFD name.

  virtual const char*

  do_target_bfd_name(const Target* target)

  {

    if (!this->is_our_target(target))

      return NULL;

    return (target->osabi() == elfcpp::ELFOSABI_FREEBSD

            ? this->freebsd_bfd_name_

            : this->bfd_name_);

  }

 private:

  // The BFD name for the non-Freebsd target.

  const char* bfd_name_;

  // The BFD name for the Freebsd target.

  const char* freebsd_bfd_name_;

};

} // end namespace gold

#endif // !defined(GOLD_FREEBSD_H)