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      1 // freebsd.h -- FreeBSD support for gold    -*- C++ -*-
      2 
      3 // Copyright (C) 2009-2016 Free Software Foundation, Inc.
      4 // Written by Ian Lance Taylor <iant (at) 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)
    104