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//===- SectLinker.h -------------------------------------------------------===//
//
// The MCLinker Project
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//SectLinker is a base class inherited by target specific linker.
//This class primarily handles common functionality used by all linkers.
//
//===----------------------------------------------------------------------===//
#ifndef SECTION_LINKER_H
#define SECTION_LINKER_H
#ifdef ENABLE_UNITTEST
#include <gtest.h>
#endif
#include <llvm/CodeGen/MachineFunctionPass.h>
#include <mcld/Support/PositionDependentOption.h>
#include <vector>
namespace llvm
{
class Module;
class MachineFunction;
} // namespace of llvm
namespace mcld
{
class MCLDFile;
class MCLDDriver;
class TargetLDBackend;
class AttributeFactory;
class SectLinkerOption;
/** \class SectLinker
* \brief SectLinker provides a linking pass for standard compilation flow
*
* SectLinker is responded for
* - provide an interface for target-specific SectLinekr
* - set up environment for MCLDDriver
* - control AsmPrinter, make sure AsmPrinter has already prepared
* all MCSectionDatas for linking
*
* SectLinker resolves the absolue paths of input arguments.
*
* @see MachineFunctionPass MCLDDriver
*/
class SectLinker : public llvm::MachineFunctionPass
{
protected:
// Constructor. Although SectLinker has only two arguments,
// TargetSectLinker should handle
// - enabled attributes
// - the default attribute
// - the default link script
// - the standard symbols
SectLinker(SectLinkerOption &pOption,
TargetLDBackend &pLDBackend);
public:
virtual ~SectLinker();
/// addTargetOptions - target SectLinker can hook this function to add
/// target-specific inputs
virtual void addTargetOptions(llvm::Module &pM,
SectLinkerOption &pOption)
{ }
/// doInitialization - Read all parameters and set up the AsmPrinter.
/// If your pass overrides this, it must make sure to explicitly call
/// this implementation.
virtual bool doInitialization(llvm::Module &pM);
/// doFinalization - Shut down the AsmPrinter, and do really linking.
/// If you override this in your pass, you must make sure to call it
/// explicitly.
virtual bool doFinalization(llvm::Module &pM);
/// runOnMachineFunction
/// redirect to AsmPrinter
virtual bool runOnMachineFunction(llvm::MachineFunction& pMFn);
protected:
void initializeInputTree(const PositionDependentOptions &pOptions) const;
AttributeFactory* attrFactory()
{ return m_pAttrFactory; }
private:
SectLinkerOption *m_pOption;
protected:
TargetLDBackend *m_pLDBackend;
MCLDDriver *m_pLDDriver;
AttributeFactory *m_pAttrFactory;
private:
static char m_ID;
};
} // namespace of MC Linker
#endif
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