--- /dev/null
+// freebsd.h -- FreeBSD support for gold -*- C++ -*-
+
+// Copyright 2009 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 subclass of Sized_target
+// which supports that. The real target would be a subclass of this
+// one. We permit combining FreeBSD and non-FreeBSD object files.
+// The effect of this target is to set the code in the output file.
+
+template<int size, bool big_endian>
+class Target_freebsd : public Sized_target<size, big_endian>
+{
+ public:
+ // Set the value to use for the EI_OSABI field in the ELF header.
+ void
+ set_osabi(elfcpp::ELFOSABI osabi)
+ { this->osabi_ = osabi; }
+
+ protected:
+ Target_freebsd(const Target::Target_info* pti)
+ : Sized_target<size, big_endian>(pti),
+ osabi_(elfcpp::ELFOSABI_NONE)
+ { }
+
+ virtual void
+ do_adjust_elf_header(unsigned char* view, int len) const;
+
+ private:
+ // Value to store in the EI_OSABI field of the ELF file header.
+ elfcpp::ELFOSABI osabi_;
+};
+
+// Adjust the ELF file header by storing the requested value in the
+// OSABI field. This is for FreeBSD support.
+
+template<int size, bool big_endian>
+inline void
+Target_freebsd<size, big_endian>::do_adjust_elf_header(unsigned char* view,
+ int len) const
+{
+ if (this->osabi_ != elfcpp::ELFOSABI_NONE)
+ {
+ gold_assert(len == elfcpp::Elf_sizes<size>::ehdr_size);
+
+ elfcpp::Ehdr<size, false> ehdr(view);
+ unsigned char e_ident[elfcpp::EI_NIDENT];
+ memcpy(e_ident, ehdr.get_e_ident(), elfcpp::EI_NIDENT);
+
+ e_ident[elfcpp::EI_OSABI] = this->osabi_;
+
+ elfcpp::Ehdr_write<size, false> oehdr(view);
+ oehdr.put_e_ident(e_ident);
+ }
+}
+
+// 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)
+ : Target_selector(machine, size, is_big_endian, NULL),
+ 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)
+ this->set_osabi(ret);
+ return ret;
+ }
+
+ // Recognize two names.
+ virtual Target*
+ do_recognize_by_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();
+ this->set_osabi(ret);
+ return ret;
+ }
+ else
+ return NULL;
+ }
+
+ // Print both names in --help output.
+ virtual void
+ do_supported_names(std::vector<const char*>* names)
+ {
+ names->push_back(this->bfd_name_);
+ names->push_back(this->freebsd_bfd_name_);
+ }
+
+ private:
+ // Set the OSABI field. This is quite ugly.
+ void
+ set_osabi(Target* target)
+ {
+ if (this->get_size() == 32)
+ {
+ if (this->is_big_endian())
+ static_cast<Target_freebsd<32, true>*>(target)->
+ set_osabi(elfcpp::ELFOSABI_FREEBSD);
+ else
+ static_cast<Target_freebsd<32, false>*>(target)->
+ set_osabi(elfcpp::ELFOSABI_FREEBSD);
+ }
+ else if (this->get_size() == 64)
+ {
+ if (this->is_big_endian())
+ static_cast<Target_freebsd<64, true>*>(target)->
+ set_osabi(elfcpp::ELFOSABI_FREEBSD);
+ else
+ static_cast<Target_freebsd<64, false>*>(target)->
+ set_osabi(elfcpp::ELFOSABI_FREEBSD);
+ }
+ else
+ gold_unreachable();
+ }
+
+ // 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)
projects / msp430-binutils.git / blobdiff