// target-select.h -- select a target for an object file -*- C++ -*-
-// Copyright 2006, 2007 Free Software Foundation, Inc.
+// Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
#ifndef GOLD_TARGET_SELECT_H
#define GOLD_TARGET_SELECT_H
+#include <vector>
+
namespace gold
{
public:
// Create a target selector for a specific machine number, size (32
// or 64), and endianness. The machine number can be EM_NONE to
- // test for any machine number.
- Target_selector(int machine, int size, bool is_big_endian);
+ // test for any machine number. BFD_NAME is the name of the target
+ // used by the GNU linker, for backward compatibility; it may be
+ // NULL.
+ Target_selector(int machine, int size, bool is_big_endian,
+ const char* bfd_name);
virtual ~Target_selector()
{ }
// If we can handle this target, return a pointer to a target
// structure. The size and endianness are known.
- virtual Target*
- recognize(int machine, int osabi, int abiversion) = 0;
+ Target*
+ recognize(int machine, int osabi, int abiversion)
+ { return this->do_recognize(machine, osabi, abiversion); }
// If NAME matches the target, return a pointer to a target
// structure.
- virtual Target*
- recognize_by_name(const char* name) = 0;
+ Target*
+ recognize_by_name(const char* name)
+ { return this->do_recognize_by_name(name); }
+
+ // Push all supported names onto the vector. This is only used for
+ // help output.
+ void
+ supported_names(std::vector<const char*>* names)
+ { this->do_supported_names(names); }
// Return the next Target_selector in the linked list.
Target_selector*
next() const
{ return this->next_; }
- // Return the machine number this selector is looking for, which can
- // be EM_NONE to match any machine number.
+ // Return the machine number this selector is looking for. This can
+ // be EM_NONE to match any machine number, in which case the
+ // do_recognize hook will be responsible for matching the machine
+ // number.
int
machine() const
{ return this->machine_; }
is_big_endian() const
{ return this->is_big_endian_; }
+ // Return the BFD name. This may return NULL, in which case the
+ // do_recognize_by_name hook will be responsible for matching the
+ // BFD name.
+ const char*
+ bfd_name() const
+ { return this->bfd_name_; }
+
+ protected:
+ // Return an instance of the real target. This must be implemented
+ // by the child class.
+ virtual Target*
+ do_instantiate_target() = 0;
+
+ // Recognize an object file given a machine code, size, and
+ // endianness. When this is called we already know that they match
+ // the machine_, size_, and is_big_endian_ fields. The child class
+ // may implement a different version of this to do additional
+ // checks, or to check for multiple machine codes if the machine_
+ // field is EM_NONE.
+ virtual Target*
+ do_recognize(int, int, int)
+ { return this->instantiate_target(); }
+
+ // Recognize a target by name. When this is called we already know
+ // that the name matches (or that the bfd_name_ field is NULL). The
+ // child class may implement a different version of this to
+ // recognize more than one name.
+ virtual Target*
+ do_recognize_by_name(const char*)
+ { return this->instantiate_target(); }
+
+ // Return a list of supported BFD names. The child class may
+ // implement a different version of this to handle more than one
+ // name.
+ virtual void
+ do_supported_names(std::vector<const char*>* names)
+ {
+ gold_assert(this->bfd_name_ != NULL);
+ names->push_back(this->bfd_name_);
+ }
+
private:
- int machine_;
- int size_;
- bool is_big_endian_;
+ // Instantiate the target and return it.
+ Target*
+ instantiate_target()
+ {
+ if (this->instantiated_target_ == NULL)
+ this->instantiated_target_ = this->do_instantiate_target();
+ return this->instantiated_target_;
+ }
+
+ // ELF machine code.
+ const int machine_;
+ // Target size--32 or 64.
+ const int size_;
+ // Whether the target is big endian.
+ const bool is_big_endian_;
+ // BFD name of target, for compatibility.
+ const char* const bfd_name_;
+ // Next entry in list built at global constructor time.
Target_selector* next_;
+ // The singleton Target structure--this points to an instance of the
+ // real implementation.
+ Target* instantiated_target_;
};
// Select the target for an ELF file.
-extern Target* select_target(int machine, int size, bool big_endian,
- int osabi, int abiversion);
+extern Target*
+select_target(int machine, int size, bool big_endian, int osabi,
+ int abiversion);
// Select a target using a BFD name.
-extern Target* select_target_by_name(const char* name);
+extern Target*
+select_target_by_name(const char* name);
+
+// Fill in a vector with the list of supported targets. This returns
+// a list of BFD names.
+
+extern void
+supported_target_names(std::vector<const char*>*);
} // End namespace gold.
projects / deliverable / binutils-gdb.git / blobdiff