1  // freebsd.h -- FreeBSD support for gold    -*- C++ -*-
       2  
       3  // Copyright (C) 2009-2023 Free Software Foundation, Inc.
       4  // Written by Ian Lance Taylor <iant@google.com>.
       5  
       6  // This file is part of gold.
       7  
       8  // This program is free software; you can redistribute it and/or modify
       9  // it under the terms of the GNU General Public License as published by
      10  // the Free Software Foundation; either version 3 of the License, or
      11  // (at your option) any later version.
      12  
      13  // This program is distributed in the hope that it will be useful,
      14  // but WITHOUT ANY WARRANTY; without even the implied warranty of
      15  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      16  // GNU General Public License for more details.
      17  
      18  // You should have received a copy of the GNU General Public License
      19  // along with this program; if not, write to the Free Software
      20  // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
      21  // MA 02110-1301, USA.
      22  
      23  #include "target.h"
      24  #include "target-select.h"
      25  
      26  #ifndef GOLD_FREEBSD_H
      27  #define GOLD_FREEBSD_H
      28  
      29  namespace gold
      30  {
      31  
      32  // FreeBSD 4.1 and later wants the EI_OSABI field in the ELF header to
      33  // be set to ELFOSABI_FREEBSD.  This is a target selector for targets
      34  // which permit combining both FreeBSD and non-FreeBSD object files.
      35  
      36  class Target_selector_freebsd : public Target_selector
      37  {
      38   public:
      39    Target_selector_freebsd(int machine, int size, bool is_big_endian,
      40  			  const char* bfd_name,
      41  			  const char* freebsd_bfd_name,
      42  			  const char* emulation)
      43      : Target_selector(machine, size, is_big_endian, NULL, emulation),
      44        bfd_name_(bfd_name), freebsd_bfd_name_(freebsd_bfd_name)
      45    { }
      46  
      47   protected:
      48    // If we see a FreeBSD input file, mark the output file as using
      49    // FreeBSD.
      50    virtual Target*
      51    do_recognize(Input_file*, off_t, int, int osabi, int)
      52    {
      53      Target* ret = this->instantiate_target();
      54      if (osabi == elfcpp::ELFOSABI_FREEBSD)
      55        ret->set_osabi(static_cast<elfcpp::ELFOSABI>(osabi));
      56      return ret;
      57    }
      58  
      59    // Recognize two names.
      60    virtual Target*
      61    do_recognize_by_bfd_name(const char* name)
      62    {
      63      if (strcmp(name, this->bfd_name_) == 0)
      64        return this->instantiate_target();
      65      else if (strcmp(name, this->freebsd_bfd_name_) == 0)
      66        {
      67  	Target* ret = this->instantiate_target();
      68  	ret->set_osabi(elfcpp::ELFOSABI_FREEBSD);
      69  	return ret;
      70        }
      71      else
      72        return NULL;
      73    }
      74  
      75    // Print both names in --help output.
      76    virtual void
      77    do_supported_bfd_names(std::vector<const char*>* names)
      78    {
      79      names->push_back(this->bfd_name_);
      80      names->push_back(this->freebsd_bfd_name_);
      81    }
      82  
      83    // Return appropriate BFD name.
      84    virtual const char*
      85    do_target_bfd_name(const Target* target)
      86    {
      87      if (!this->is_our_target(target))
      88        return NULL;
      89      return (target->osabi() == elfcpp::ELFOSABI_FREEBSD
      90  	    ? this->freebsd_bfd_name_
      91  	    : this->bfd_name_);
      92    }
      93  
      94   private:
      95    // The BFD name for the non-Freebsd target.
      96    const char* bfd_name_;
      97    // The BFD name for the Freebsd target.
      98    const char* freebsd_bfd_name_;
      99  };
     100  
     101  } // end namespace gold
     102  
     103  #endif // !defined(GOLD_FREEBSD_H)