2006-08-19 00:29:20 +02:00
|
|
|
// target-select.h -- select a target for an object file -*- C++ -*-
|
|
|
|
|
|
|
|
#ifndef GOLD_TARGET_SELECT_H
|
|
|
|
#define GOLD_TARGET_SELECT_H
|
|
|
|
|
|
|
|
namespace gold
|
|
|
|
{
|
|
|
|
|
|
|
|
class Target;
|
|
|
|
|
|
|
|
// We want to avoid a master list of targets, which implies using a
|
|
|
|
// global constructor. And we also want the program to start up as
|
|
|
|
// quickly as possible, which implies avoiding global constructors.
|
|
|
|
// We compromise on a very simple global constructor. We use a target
|
|
|
|
// selector, which specifies an ELF machine number and a recognition
|
|
|
|
// function. We use global constructors to build a linked list of
|
|
|
|
// target selectors--a simple pointer list, not a std::list.
|
|
|
|
|
|
|
|
class Target_selector
|
|
|
|
{
|
|
|
|
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 big_endian);
|
|
|
|
|
|
|
|
virtual ~Target_selector()
|
|
|
|
{ }
|
|
|
|
|
|
|
|
// If we can handle this target, return a pointer to a target
|
|
|
|
// structure. The size and endianness are known.
|
2006-11-03 19:26:11 +01:00
|
|
|
virtual Target* recognize(int machine, int osabi, int abiversion) = 0;
|
2006-08-19 00:29:20 +02:00
|
|
|
|
|
|
|
// 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.
|
|
|
|
int
|
|
|
|
machine() const
|
|
|
|
{ return this->machine_; }
|
|
|
|
|
|
|
|
// Return the size this is looking for (32 or 64).
|
|
|
|
int
|
|
|
|
size() const
|
|
|
|
{ return this->size_; }
|
|
|
|
|
|
|
|
// Return the endianness this is looking for.
|
|
|
|
bool
|
|
|
|
big_endian() const
|
|
|
|
{ return this->big_endian_; }
|
|
|
|
|
|
|
|
private:
|
|
|
|
int machine_;
|
|
|
|
int size_;
|
|
|
|
bool big_endian_;
|
|
|
|
Target_selector* next_;
|
|
|
|
};
|
|
|
|
|
|
|
|
// Select the target for an ELF file.
|
|
|
|
|
|
|
|
extern Target* select_target(int machine, int size, bool big_endian,
|
|
|
|
int osabi, int abiversion);
|
|
|
|
|
|
|
|
} // End namespace gold.
|
|
|
|
|
|
|
|
#endif // !defined(GOLD_TARGET_SELECT_H)
|