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// target-select.h -- select a target for an object file -*- C++ -*-
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// target-select.h -- select a target for an object file -*- C++ -*-
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// Copyright 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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// Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
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// Written by Ian Lance Taylor <iant@google.com>.
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// Written by Ian Lance Taylor <iant@google.com>.
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// This file is part of gold.
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// This file is part of gold.
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// This program is free software; you can redistribute it and/or modify
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// This program is free software; you can redistribute it and/or modify
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public:
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public:
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// Create a target selector for a specific machine number, size (32
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// Create a target selector for a specific machine number, size (32
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// or 64), and endianness. The machine number can be EM_NONE to
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// or 64), and endianness. The machine number can be EM_NONE to
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// test for any machine number. BFD_NAME is the name of the target
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// test for any machine number. BFD_NAME is the name of the target
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// used by the GNU linker, for backward compatibility; it may be
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// used by the GNU linker, for backward compatibility; it may be
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// NULL.
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// NULL. EMULATION is the name of the emulation used by the GNU
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// linker; it is similar to BFD_NAME.
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Target_selector(int machine, int size, bool is_big_endian,
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Target_selector(int machine, int size, bool is_big_endian,
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const char* bfd_name);
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const char* bfd_name, const char* emulation);
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virtual ~Target_selector()
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virtual ~Target_selector()
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{ }
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{ }
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// If we can handle this target, return a pointer to a target
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// If we can handle this target, return a pointer to a target
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{ return this->do_recognize(machine, osabi, abiversion); }
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{ return this->do_recognize(machine, osabi, abiversion); }
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// If NAME matches the target, return a pointer to a target
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// If NAME matches the target, return a pointer to a target
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// structure.
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// structure.
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Target*
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Target*
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recognize_by_name(const char* name)
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recognize_by_bfd_name(const char* name)
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{ return this->do_recognize_by_name(name); }
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{ return this->do_recognize_by_bfd_name(name); }
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// Push all supported names onto the vector. This is only used for
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// Push all supported BFD names onto the vector. This is only used
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// help output.
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// for help output.
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void
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void
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supported_names(std::vector<const char*>* names)
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supported_bfd_names(std::vector<const char*>* names)
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{ this->do_supported_names(names); }
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{ this->do_supported_bfd_names(names); }
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// If NAME matches the target emulation, return a pointer to a
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// target structure.
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Target*
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recognize_by_emulation(const char* name)
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{ return this->do_recognize_by_emulation(name); }
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// Push all supported emulations onto the vector. This is only used
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// for help output.
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void
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supported_emulations(std::vector<const char*>* names)
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{ this->do_supported_emulations(names); }
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// Return the next Target_selector in the linked list.
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// Return the next Target_selector in the linked list.
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Target_selector*
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Target_selector*
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next() const
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next() const
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{ return this->next_; }
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{ return this->next_; }
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bool
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bool
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is_big_endian() const
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is_big_endian() const
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{ return this->is_big_endian_; }
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{ return this->is_big_endian_; }
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// Return the BFD name. This may return NULL, in which case the
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// Return the BFD name. This may return NULL, in which case the
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// do_recognize_by_name hook will be responsible for matching the
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// do_recognize_by_bfd_name hook will be responsible for matching
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// BFD name.
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// the BFD name.
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const char*
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const char*
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bfd_name() const
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bfd_name() const
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{ return this->bfd_name_; }
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{ return this->bfd_name_; }
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// Return the emulation. This may return NULL, in which case the
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// do_recognize_by_emulation hook will be responsible for matching
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// the emulation.
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const char*
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emulation() const
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{ return this->emulation_; }
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// The reverse mapping, for --print-output-format: if we
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// instantiated TARGET, return our BFD_NAME. If we did not
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// instantiate it, return NULL.
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const char*
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target_bfd_name(const Target* target)
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{ return this->do_target_bfd_name(target); }
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protected:
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protected:
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// Return an instance of the real target. This must be implemented
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// Return an instance of the real target. This must be implemented
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// by the child class.
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// by the child class.
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virtual Target*
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virtual Target*
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do_instantiate_target() = 0;
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do_instantiate_target() = 0;
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// Recognize a target by name. When this is called we already know
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// Recognize a target by name. When this is called we already know
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// that the name matches (or that the bfd_name_ field is NULL). The
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// that the name matches (or that the bfd_name_ field is NULL). The
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// child class may implement a different version of this to
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// child class may implement a different version of this to
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// recognize more than one name.
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// recognize more than one name.
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virtual Target*
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virtual Target*
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do_recognize_by_name(const char*)
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do_recognize_by_bfd_name(const char*)
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{ return this->instantiate_target(); }
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{ return this->instantiate_target(); }
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// Return a list of supported BFD names. The child class may
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// Return a list of supported BFD names. The child class may
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// implement a different version of this to handle more than one
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// implement a different version of this to handle more than one
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// name.
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// name.
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virtual void
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virtual void
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do_supported_names(std::vector<const char*>* names)
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do_supported_bfd_names(std::vector<const char*>* names)
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{
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{
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gold_assert(this->bfd_name_ != NULL);
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gold_assert(this->bfd_name_ != NULL);
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names->push_back(this->bfd_name_);
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names->push_back(this->bfd_name_);
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}
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}
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// Recognize a target by emulation. When this is called we already
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// know that the name matches (or that the emulation_ field is
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// NULL). The child class may implement a different version of this
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// to recognize more than one emulation.
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virtual Target*
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do_recognize_by_emulation(const char*)
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{ return this->instantiate_target(); }
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// Return a list of supported emulations. The child class may
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// implement a different version of this to handle more than one
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// emulation.
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virtual void
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do_supported_emulations(std::vector<const char*>* emulations)
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{
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gold_assert(this->emulation_ != NULL);
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emulations->push_back(this->emulation_);
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}
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// Map from target to BFD name.
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virtual const char*
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do_target_bfd_name(const Target*);
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// Instantiate the target and return it.
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// Instantiate the target and return it.
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Target*
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Target*
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instantiate_target();
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instantiate_target();
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// Return whether TARGET is the target we instantiated.
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bool
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is_our_target(const Target* target)
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{ return target == this->instantiated_target_; }
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private:
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private:
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// Set the target.
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// Set the target.
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void
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void
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set_target();
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set_target();
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const int size_;
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const int size_;
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// Whether the target is big endian.
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// Whether the target is big endian.
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const bool is_big_endian_;
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const bool is_big_endian_;
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// BFD name of target, for compatibility.
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// BFD name of target, for compatibility.
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const char* const bfd_name_;
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const char* const bfd_name_;
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// GNU linker emulation for this target, for compatibility.
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const char* const emulation_;
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// Next entry in list built at global constructor time.
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// Next entry in list built at global constructor time.
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Target_selector* next_;
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Target_selector* next_;
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// The singleton Target structure--this points to an instance of the
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// The singleton Target structure--this points to an instance of the
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// real implementation.
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// real implementation.
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Target* instantiated_target_;
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Target* instantiated_target_;
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int abiversion);
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int abiversion);
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// Select a target using a BFD name.
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// Select a target using a BFD name.
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extern Target*
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extern Target*
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select_target_by_name(const char* name);
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select_target_by_bfd_name(const char* name);
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// Select a target using a GNU linker emulation.
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extern Target*
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select_target_by_emulation(const char* name);
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// Fill in a vector with the list of supported targets. This returns
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// Fill in a vector with the list of supported targets. This returns
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// a list of BFD names.
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// a list of BFD names.
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extern void
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extern void
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supported_target_names(std::vector<const char*>*);
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supported_target_names(std::vector<const char*>*);
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// Fill in a vector with the list of supported emulations.
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extern void
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supported_emulation_names(std::vector<const char*>*);
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// Print the output format, for the --print-output-format option.
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extern void
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print_output_format();
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} // End namespace gold.
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} // End namespace gold.
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#endif // !defined(GOLD_TARGET_SELECT_H)
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#endif // !defined(GOLD_TARGET_SELECT_H)
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No newline at end of file
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