include/llvm/Object/ObjectFile.h - llvm - Git at Google

 //===- ObjectFile.h - File format independent object file -------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares a file format independent ObjectFile class.
 //
 //===----------------------------------------------------------------------===//

 #ifndef LLVM_OBJECT_OBJECT_FILE_H
 #define LLVM_OBJECT_OBJECT_FILE_H

 #include "llvm/Object/Binary.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/DataTypes.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include <cstring>

 namespace llvm {
 namespace object {

 class ObjectFile;

 union DataRefImpl {
   struct {
     // ELF needs this for relocations. This entire union should probably be a
     // char[max(8, sizeof(uintptr_t))] and require the impl to cast.
     uint16_t a, b;
     uint32_t c;
   } w;
   struct {
     uint32_t a, b;
   } d;
   uintptr_t p;
 };

 template<class content_type>
 class content_iterator {
   content_type Current;
 public:
   content_iterator(content_type symb)
     : Current(symb) {}

   const content_type* operator->() const {
     return &Current;
   }

   const content_type &operator*() const {
     return Current;
   }

   bool operator==(const content_iterator &other) const {
     return Current == other.Current;
   }

   bool operator!=(const content_iterator &other) const {
     return !(*this == other);
   }

   content_iterator& increment(error_code &err) {
     content_type next;
     if (error_code ec = Current.getNext(next))
       err = ec;
     else
       Current = next;
     return *this;
   }
 };

 static bool operator ==(const DataRefImpl &a, const DataRefImpl &b) {
   // Check bitwise identical. This is the only legal way to compare a union w/o
   // knowing which member is in use.
   return std::memcmp(&a, &b, sizeof(DataRefImpl)) == 0;
 }

 /// SymbolRef - This is a value type class that represents a single symbol in
 /// the list of symbols in the object file.
 class SymbolRef {
   friend class SectionRef;
   DataRefImpl SymbolPimpl;
   const ObjectFile *OwningObject;

 public:
   SymbolRef() : OwningObject(NULL) {
     std::memset(&SymbolPimpl, 0, sizeof(SymbolPimpl));
   }

   enum SymbolType {
     ST_Function,
     ST_Data,
     ST_External,    // Defined in another object file
     ST_Other
   };

   SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner);

   bool operator==(const SymbolRef &Other) const;

   error_code getNext(SymbolRef &Result) const;

   error_code getName(StringRef &Result) const;
   error_code getAddress(uint64_t &Result) const;
   error_code getOffset(uint64_t &Result) const;
   error_code getSize(uint64_t &Result) const;
   error_code getSymbolType(SymbolRef::SymbolType &Result) const;

   /// Returns the ascii char that should be displayed in a symbol table dump via
   /// nm for this symbol.
   error_code getNMTypeChar(char &Result) const;

   /// Returns true for symbols that are internal to the object file format such
   /// as section symbols.
   error_code isInternal(bool &Result) const;

   /// Returns true for symbols that can be used in another objects,
   /// such as library functions
   error_code isGlobal(bool &Result) const;

   DataRefImpl getRawDataRefImpl() const;
 };
 typedef content_iterator<SymbolRef> symbol_iterator;

 /// RelocationRef - This is a value type class that represents a single
 /// relocation in the list of relocations in the object file.
 class RelocationRef {
   DataRefImpl RelocationPimpl;
   const ObjectFile *OwningObject;

 public:
   RelocationRef() : OwningObject(NULL) {
     std::memset(&RelocationPimpl, 0, sizeof(RelocationPimpl));
   }

   RelocationRef(DataRefImpl RelocationP, const ObjectFile *Owner);

   bool operator==(const RelocationRef &Other) const;

   error_code getNext(RelocationRef &Result) const;

   error_code getAddress(uint64_t &Result) const;
   error_code getSymbol(SymbolRef &Result) const;
   error_code getType(uint32_t &Result) const;

   /// @brief Get a string that represents the type of this relocation.
   ///
   /// This is for display purposes only.
   error_code getTypeName(SmallVectorImpl<char> &Result) const;
   error_code getAdditionalInfo(int64_t &Result) const;

   /// @brief Get a string that represents the calculation of the value of this
   ///        relocation.
   ///
   /// This is for display purposes only.
   error_code getValueString(SmallVectorImpl<char> &Result) const;
 };
 typedef content_iterator<RelocationRef> relocation_iterator;

 /// SectionRef - This is a value type class that represents a single section in
 /// the list of sections in the object file.
 class SectionRef {
   friend class SymbolRef;
   DataRefImpl SectionPimpl;
   const ObjectFile *OwningObject;

 public:
   SectionRef() : OwningObject(NULL) {
     std::memset(&SectionPimpl, 0, sizeof(SectionPimpl));
   }

   SectionRef(DataRefImpl SectionP, const ObjectFile *Owner);

   bool operator==(const SectionRef &Other) const;

   error_code getNext(SectionRef &Result) const;

   error_code getName(StringRef &Result) const;
   error_code getAddress(uint64_t &Result) const;
   error_code getSize(uint64_t &Result) const;
   error_code getContents(StringRef &Result) const;

   /// @brief Get the alignment of this section as the actual value (not log 2).
   error_code getAlignment(uint64_t &Result) const;

   // FIXME: Move to the normalization layer when it's created.
   error_code isText(bool &Result) const;
   error_code isData(bool &Result) const;
   error_code isBSS(bool &Result) const;

   error_code containsSymbol(SymbolRef S, bool &Result) const;

   relocation_iterator begin_relocations() const;
   relocation_iterator end_relocations() const;
 };
 typedef content_iterator<SectionRef> section_iterator;

 const uint64_t UnknownAddressOrSize = ~0ULL;

 /// ObjectFile - This class is the base class for all object file types.
 /// Concrete instances of this object are created by createObjectFile, which
 /// figure out which type to create.
 class ObjectFile : public Binary {
 private:
   ObjectFile(); // = delete
   ObjectFile(const ObjectFile &other); // = delete

 protected:
   ObjectFile(unsigned int Type, MemoryBuffer *source, error_code &ec);

   const uint8_t *base() const {
     return reinterpret_cast<const uint8_t *>(Data->getBufferStart());
   }

   // These functions are for SymbolRef to call internally. The main goal of
   // this is to allow SymbolRef::SymbolPimpl to point directly to the symbol
   // entry in the memory mapped object file. SymbolPimpl cannot contain any
   // virtual functions because then it could not point into the memory mapped
   // file.
   //
   // Implementations assume that the DataRefImpl is valid and has not been
   // modified externally. It's UB otherwise.
   friend class SymbolRef;
   virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const = 0;
   virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const = 0;
   virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const =0;
   virtual error_code getSymbolOffset(DataRefImpl Symb, uint64_t &Res) const =0;
   virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const = 0;
   virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const = 0;
   virtual error_code isSymbolInternal(DataRefImpl Symb, bool &Res) const = 0;
   virtual error_code isSymbolGlobal(DataRefImpl Symb, bool &Res) const = 0;
   virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::SymbolType &Res) const = 0;

   // Same as above for SectionRef.
   friend class SectionRef;
   virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const = 0;
   virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const = 0;
   virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const =0;
   virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const = 0;
   virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res)const=0;
   virtual error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res)const=0;
   virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const = 0;
   virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const = 0;
   virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const = 0;
   virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
                                            bool &Result) const = 0;
   virtual relocation_iterator getSectionRelBegin(DataRefImpl Sec) const = 0;
   virtual relocation_iterator getSectionRelEnd(DataRefImpl Sec) const = 0;


   // Same as above for RelocationRef.
   friend class RelocationRef;
   virtual error_code getRelocationNext(DataRefImpl Rel,
                                        RelocationRef &Res) const = 0;
   virtual error_code getRelocationAddress(DataRefImpl Rel,
                                           uint64_t &Res) const =0;
   virtual error_code getRelocationSymbol(DataRefImpl Rel,
                                          SymbolRef &Res) const = 0;
   virtual error_code getRelocationType(DataRefImpl Rel,
                                        uint32_t &Res) const = 0;
   virtual error_code getRelocationTypeName(DataRefImpl Rel,
                                        SmallVectorImpl<char> &Result) const = 0;
   virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
                                                  int64_t &Res) const = 0;
   virtual error_code getRelocationValueString(DataRefImpl Rel,
                                        SmallVectorImpl<char> &Result) const = 0;

 public:

   virtual symbol_iterator begin_symbols() const = 0;
   virtual symbol_iterator end_symbols() const = 0;

   virtual section_iterator begin_sections() const = 0;
   virtual section_iterator end_sections() const = 0;

   /// @brief The number of bytes used to represent an address in this object
   ///        file format.
   virtual uint8_t getBytesInAddress() const = 0;

   virtual StringRef getFileFormatName() const = 0;
   virtual /* Triple::ArchType */ unsigned getArch() const = 0;

   /// @returns Pointer to ObjectFile subclass to handle this type of object.
   /// @param ObjectPath The path to the object file. ObjectPath.isObject must
   ///        return true.
   /// @brief Create ObjectFile from path.
   static ObjectFile *createObjectFile(StringRef ObjectPath);
   static ObjectFile *createObjectFile(MemoryBuffer *Object);

   static inline bool classof(const Binary *v) {
     return v->getType() >= isObject &&
            v->getType() < lastObject;
   }
   static inline bool classof(const ObjectFile *v) { return true; }

 public:
   static ObjectFile *createCOFFObjectFile(MemoryBuffer *Object);
   static ObjectFile *createELFObjectFile(MemoryBuffer *Object);
   static ObjectFile *createMachOObjectFile(MemoryBuffer *Object);
 };

 // Inline function definitions.
 inline SymbolRef::SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner)
   : SymbolPimpl(SymbolP)
   , OwningObject(Owner) {}

 inline bool SymbolRef::operator==(const SymbolRef &Other) const {
   return SymbolPimpl == Other.SymbolPimpl;
 }

 inline error_code SymbolRef::getNext(SymbolRef &Result) const {
   return OwningObject->getSymbolNext(SymbolPimpl, Result);
 }

 inline error_code SymbolRef::getName(StringRef &Result) const {
   return OwningObject->getSymbolName(SymbolPimpl, Result);
 }

 inline error_code SymbolRef::getAddress(uint64_t &Result) const {
   return OwningObject->getSymbolAddress(SymbolPimpl, Result);
 }

 inline error_code SymbolRef::getOffset(uint64_t &Result) const {
   return OwningObject->getSymbolOffset(SymbolPimpl, Result);
 }

 inline error_code SymbolRef::getSize(uint64_t &Result) const {
   return OwningObject->getSymbolSize(SymbolPimpl, Result);
 }

 inline error_code SymbolRef::getNMTypeChar(char &Result) const {
   return OwningObject->getSymbolNMTypeChar(SymbolPimpl, Result);
 }

 inline error_code SymbolRef::isInternal(bool &Result) const {
   return OwningObject->isSymbolInternal(SymbolPimpl, Result);
 }

 inline error_code SymbolRef::isGlobal(bool &Result) const {
   return OwningObject->isSymbolGlobal(SymbolPimpl, Result);
 }

 inline error_code SymbolRef::getSymbolType(SymbolRef::SymbolType &Result) const {
   return OwningObject->getSymbolType(SymbolPimpl, Result);
 }

 inline DataRefImpl SymbolRef::getRawDataRefImpl() const {
   return SymbolPimpl;
 }


 /// SectionRef
 inline SectionRef::SectionRef(DataRefImpl SectionP,
                               const ObjectFile *Owner)
   : SectionPimpl(SectionP)
   , OwningObject(Owner) {}

 inline bool SectionRef::operator==(const SectionRef &Other) const {
   return SectionPimpl == Other.SectionPimpl;
 }

 inline error_code SectionRef::getNext(SectionRef &Result) const {
   return OwningObject->getSectionNext(SectionPimpl, Result);
 }

 inline error_code SectionRef::getName(StringRef &Result) const {
   return OwningObject->getSectionName(SectionPimpl, Result);
 }

 inline error_code SectionRef::getAddress(uint64_t &Result) const {
   return OwningObject->getSectionAddress(SectionPimpl, Result);
 }

 inline error_code SectionRef::getSize(uint64_t &Result) const {
   return OwningObject->getSectionSize(SectionPimpl, Result);
 }

 inline error_code SectionRef::getContents(StringRef &Result) const {
   return OwningObject->getSectionContents(SectionPimpl, Result);
 }

 inline error_code SectionRef::getAlignment(uint64_t &Result) const {
   return OwningObject->getSectionAlignment(SectionPimpl, Result);
 }

 inline error_code SectionRef::isText(bool &Result) const {
   return OwningObject->isSectionText(SectionPimpl, Result);
 }

 inline error_code SectionRef::isData(bool &Result) const {
   return OwningObject->isSectionData(SectionPimpl, Result);
 }

 inline error_code SectionRef::isBSS(bool &Result) const {
   return OwningObject->isSectionBSS(SectionPimpl, Result);
 }

 inline error_code SectionRef::containsSymbol(SymbolRef S, bool &Result) const {
   return OwningObject->sectionContainsSymbol(SectionPimpl, S.SymbolPimpl,
                                              Result);
 }

 inline relocation_iterator SectionRef::begin_relocations() const {
   return OwningObject->getSectionRelBegin(SectionPimpl);
 }

 inline relocation_iterator SectionRef::end_relocations() const {
   return OwningObject->getSectionRelEnd(SectionPimpl);
 }


 /// RelocationRef
 inline RelocationRef::RelocationRef(DataRefImpl RelocationP,
                               const ObjectFile *Owner)
   : RelocationPimpl(RelocationP)
   , OwningObject(Owner) {}

 inline bool RelocationRef::operator==(const RelocationRef &Other) const {
   return RelocationPimpl == Other.RelocationPimpl;
 }

 inline error_code RelocationRef::getNext(RelocationRef &Result) const {
   return OwningObject->getRelocationNext(RelocationPimpl, Result);
 }

 inline error_code RelocationRef::getAddress(uint64_t &Result) const {
   return OwningObject->getRelocationAddress(RelocationPimpl, Result);
 }

 inline error_code RelocationRef::getSymbol(SymbolRef &Result) const {
   return OwningObject->getRelocationSymbol(RelocationPimpl, Result);
 }

 inline error_code RelocationRef::getType(uint32_t &Result) const {
   return OwningObject->getRelocationType(RelocationPimpl, Result);
 }

 inline error_code RelocationRef::getTypeName(SmallVectorImpl<char> &Result)
   const {
   return OwningObject->getRelocationTypeName(RelocationPimpl, Result);
 }

 inline error_code RelocationRef::getAdditionalInfo(int64_t &Result) const {
   return OwningObject->getRelocationAdditionalInfo(RelocationPimpl, Result);
 }

 inline error_code RelocationRef::getValueString(SmallVectorImpl<char> &Result)
   const {
   return OwningObject->getRelocationValueString(RelocationPimpl, Result);
 }

 } // end namespace object
 } // end namespace llvm

 #endif
	//===- ObjectFile.h - File format independent object file -------- C++ --===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is distributed under the University of Illinois Open Source
	// License. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//
	//
	// This file declares a file format independent ObjectFile class.
	//
	//===----------------------------------------------------------------------===//

	#ifndef LLVM_OBJECT_OBJECT_FILE_H
	#define LLVM_OBJECT_OBJECT_FILE_H

	#include "llvm/Object/Binary.h"
	#include "llvm/ADT/StringRef.h"
	#include "llvm/Support/DataTypes.h"
	#include "llvm/Support/ErrorHandling.h"
	#include "llvm/Support/MemoryBuffer.h"
	#include <cstring>

	namespace llvm {
	namespace object {

	class ObjectFile;

	union DataRefImpl {
	struct {
	// ELF needs this for relocations. This entire union should probably be a
	// char[max(8, sizeof(uintptr_t))] and require the impl to cast.
	uint16_t a, b;
	uint32_t c;
	} w;
	struct {
	uint32_t a, b;
	} d;
	uintptr_t p;
	};

	template<class content_type>
	class content_iterator {
	content_type Current;
	public:
	content_iterator(content_type symb)
	: Current(symb) {}

	const content_type* operator->() const {
	return &Current;
	}

	const content_type &operator*() const {
	return Current;
	}

	bool operator==(const content_iterator &other) const {
	return Current == other.Current;
	}

	bool operator!=(const content_iterator &other) const {
	return !(*this == other);
	}

	content_iterator& increment(error_code &err) {
	content_type next;
	if (error_code ec = Current.getNext(next))
	err = ec;
	else
	Current = next;
	return *this;
	}
	};

	static bool operator ==(const DataRefImpl &a, const DataRefImpl &b) {
	// Check bitwise identical. This is the only legal way to compare a union w/o
	// knowing which member is in use.
	return std::memcmp(&a, &b, sizeof(DataRefImpl)) == 0;
	}

	/// SymbolRef - This is a value type class that represents a single symbol in
	/// the list of symbols in the object file.
	class SymbolRef {
	friend class SectionRef;
	DataRefImpl SymbolPimpl;
	const ObjectFile *OwningObject;

	public:
	SymbolRef() : OwningObject(NULL) {
	std::memset(&SymbolPimpl, 0, sizeof(SymbolPimpl));
	}

	enum SymbolType {
	ST_Function,
	ST_Data,
	ST_External, // Defined in another object file
	ST_Other
	};

	SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner);

	bool operator==(const SymbolRef &Other) const;

	error_code getNext(SymbolRef &Result) const;

	error_code getName(StringRef &Result) const;
	error_code getAddress(uint64_t &Result) const;
	error_code getOffset(uint64_t &Result) const;
	error_code getSize(uint64_t &Result) const;
	error_code getSymbolType(SymbolRef::SymbolType &Result) const;

	/// Returns the ascii char that should be displayed in a symbol table dump via
	/// nm for this symbol.
	error_code getNMTypeChar(char &Result) const;

	/// Returns true for symbols that are internal to the object file format such
	/// as section symbols.
	error_code isInternal(bool &Result) const;

	/// Returns true for symbols that can be used in another objects,
	/// such as library functions
	error_code isGlobal(bool &Result) const;

	DataRefImpl getRawDataRefImpl() const;
	};
	typedef content_iterator<SymbolRef> symbol_iterator;

	/// RelocationRef - This is a value type class that represents a single
	/// relocation in the list of relocations in the object file.
	class RelocationRef {
	DataRefImpl RelocationPimpl;
	const ObjectFile *OwningObject;

	public:
	RelocationRef() : OwningObject(NULL) {
	std::memset(&RelocationPimpl, 0, sizeof(RelocationPimpl));
	}

	RelocationRef(DataRefImpl RelocationP, const ObjectFile *Owner);

	bool operator==(const RelocationRef &Other) const;

	error_code getNext(RelocationRef &Result) const;

	error_code getAddress(uint64_t &Result) const;
	error_code getSymbol(SymbolRef &Result) const;
	error_code getType(uint32_t &Result) const;

	/// @brief Get a string that represents the type of this relocation.
	///
	/// This is for display purposes only.
	error_code getTypeName(SmallVectorImpl<char> &Result) const;
	error_code getAdditionalInfo(int64_t &Result) const;

	/// @brief Get a string that represents the calculation of the value of this
	/// relocation.
	///
	/// This is for display purposes only.
	error_code getValueString(SmallVectorImpl<char> &Result) const;
	};
	typedef content_iterator<RelocationRef> relocation_iterator;

	/// SectionRef - This is a value type class that represents a single section in
	/// the list of sections in the object file.
	class SectionRef {
	friend class SymbolRef;
	DataRefImpl SectionPimpl;
	const ObjectFile *OwningObject;

	public:
	SectionRef() : OwningObject(NULL) {
	std::memset(&SectionPimpl, 0, sizeof(SectionPimpl));
	}

	SectionRef(DataRefImpl SectionP, const ObjectFile *Owner);

	bool operator==(const SectionRef &Other) const;

	error_code getNext(SectionRef &Result) const;

	error_code getName(StringRef &Result) const;
	error_code getAddress(uint64_t &Result) const;
	error_code getSize(uint64_t &Result) const;
	error_code getContents(StringRef &Result) const;

	/// @brief Get the alignment of this section as the actual value (not log 2).
	error_code getAlignment(uint64_t &Result) const;

	// FIXME: Move to the normalization layer when it's created.
	error_code isText(bool &Result) const;
	error_code isData(bool &Result) const;
	error_code isBSS(bool &Result) const;

	error_code containsSymbol(SymbolRef S, bool &Result) const;

	relocation_iterator begin_relocations() const;
	relocation_iterator end_relocations() const;
	};
	typedef content_iterator<SectionRef> section_iterator;

	const uint64_t UnknownAddressOrSize = ~0ULL;

	/// ObjectFile - This class is the base class for all object file types.
	/// Concrete instances of this object are created by createObjectFile, which
	/// figure out which type to create.
	class ObjectFile : public Binary {
	private:
	ObjectFile(); // = delete
	ObjectFile(const ObjectFile &other); // = delete

	protected:
	ObjectFile(unsigned int Type, MemoryBuffer *source, error_code &ec);

	const uint8_t *base() const {
	return reinterpret_cast<const uint8_t *>(Data->getBufferStart());
	}

	// These functions are for SymbolRef to call internally. The main goal of
	// this is to allow SymbolRef::SymbolPimpl to point directly to the symbol
	// entry in the memory mapped object file. SymbolPimpl cannot contain any
	// virtual functions because then it could not point into the memory mapped
	// file.
	//
	// Implementations assume that the DataRefImpl is valid and has not been
	// modified externally. It's UB otherwise.
	friend class SymbolRef;
	virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const = 0;
	virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const = 0;
	virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const =0;
	virtual error_code getSymbolOffset(DataRefImpl Symb, uint64_t &Res) const =0;
	virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const = 0;
	virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const = 0;
	virtual error_code isSymbolInternal(DataRefImpl Symb, bool &Res) const = 0;
	virtual error_code isSymbolGlobal(DataRefImpl Symb, bool &Res) const = 0;
	virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::SymbolType &Res) const = 0;

	// Same as above for SectionRef.
	friend class SectionRef;
	virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const = 0;
	virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const = 0;
	virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const =0;
	virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const = 0;
	virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res)const=0;
	virtual error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res)const=0;
	virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const = 0;
	virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const = 0;
	virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const = 0;
	virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
	bool &Result) const = 0;
	virtual relocation_iterator getSectionRelBegin(DataRefImpl Sec) const = 0;
	virtual relocation_iterator getSectionRelEnd(DataRefImpl Sec) const = 0;


	// Same as above for RelocationRef.
	friend class RelocationRef;
	virtual error_code getRelocationNext(DataRefImpl Rel,
	RelocationRef &Res) const = 0;
	virtual error_code getRelocationAddress(DataRefImpl Rel,
	uint64_t &Res) const =0;
	virtual error_code getRelocationSymbol(DataRefImpl Rel,
	SymbolRef &Res) const = 0;
	virtual error_code getRelocationType(DataRefImpl Rel,
	uint32_t &Res) const = 0;
	virtual error_code getRelocationTypeName(DataRefImpl Rel,
	SmallVectorImpl<char> &Result) const = 0;
	virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
	int64_t &Res) const = 0;
	virtual error_code getRelocationValueString(DataRefImpl Rel,
	SmallVectorImpl<char> &Result) const = 0;

	public:

	virtual symbol_iterator begin_symbols() const = 0;
	virtual symbol_iterator end_symbols() const = 0;

	virtual section_iterator begin_sections() const = 0;
	virtual section_iterator end_sections() const = 0;

	/// @brief The number of bytes used to represent an address in this object
	/// file format.
	virtual uint8_t getBytesInAddress() const = 0;

	virtual StringRef getFileFormatName() const = 0;
	virtual /* Triple::ArchType */ unsigned getArch() const = 0;

	/// @returns Pointer to ObjectFile subclass to handle this type of object.
	/// @param ObjectPath The path to the object file. ObjectPath.isObject must
	/// return true.
	/// @brief Create ObjectFile from path.
	static ObjectFile *createObjectFile(StringRef ObjectPath);
	static ObjectFile createObjectFile(MemoryBuffer Object);

	static inline bool classof(const Binary *v) {
	return v->getType() >= isObject &&
	v->getType() < lastObject;
	}
	static inline bool classof(const ObjectFile *v) { return true; }

	public:
	static ObjectFile createCOFFObjectFile(MemoryBuffer Object);
	static ObjectFile createELFObjectFile(MemoryBuffer Object);
	static ObjectFile createMachOObjectFile(MemoryBuffer Object);
	};

	// Inline function definitions.
	inline SymbolRef::SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner)
	: SymbolPimpl(SymbolP)
	, OwningObject(Owner) {}

	inline bool SymbolRef::operator==(const SymbolRef &Other) const {
	return SymbolPimpl == Other.SymbolPimpl;
	}

	inline error_code SymbolRef::getNext(SymbolRef &Result) const {
	return OwningObject->getSymbolNext(SymbolPimpl, Result);
	}

	inline error_code SymbolRef::getName(StringRef &Result) const {
	return OwningObject->getSymbolName(SymbolPimpl, Result);
	}

	inline error_code SymbolRef::getAddress(uint64_t &Result) const {
	return OwningObject->getSymbolAddress(SymbolPimpl, Result);
	}

	inline error_code SymbolRef::getOffset(uint64_t &Result) const {
	return OwningObject->getSymbolOffset(SymbolPimpl, Result);
	}

	inline error_code SymbolRef::getSize(uint64_t &Result) const {
	return OwningObject->getSymbolSize(SymbolPimpl, Result);
	}

	inline error_code SymbolRef::getNMTypeChar(char &Result) const {
	return OwningObject->getSymbolNMTypeChar(SymbolPimpl, Result);
	}

	inline error_code SymbolRef::isInternal(bool &Result) const {
	return OwningObject->isSymbolInternal(SymbolPimpl, Result);
	}

	inline error_code SymbolRef::isGlobal(bool &Result) const {
	return OwningObject->isSymbolGlobal(SymbolPimpl, Result);
	}

	inline error_code SymbolRef::getSymbolType(SymbolRef::SymbolType &Result) const {
	return OwningObject->getSymbolType(SymbolPimpl, Result);
	}

	inline DataRefImpl SymbolRef::getRawDataRefImpl() const {
	return SymbolPimpl;
	}


	/// SectionRef
	inline SectionRef::SectionRef(DataRefImpl SectionP,
	const ObjectFile *Owner)
	: SectionPimpl(SectionP)
	, OwningObject(Owner) {}

	inline bool SectionRef::operator==(const SectionRef &Other) const {
	return SectionPimpl == Other.SectionPimpl;
	}

	inline error_code SectionRef::getNext(SectionRef &Result) const {
	return OwningObject->getSectionNext(SectionPimpl, Result);
	}

	inline error_code SectionRef::getName(StringRef &Result) const {
	return OwningObject->getSectionName(SectionPimpl, Result);
	}

	inline error_code SectionRef::getAddress(uint64_t &Result) const {
	return OwningObject->getSectionAddress(SectionPimpl, Result);
	}

	inline error_code SectionRef::getSize(uint64_t &Result) const {
	return OwningObject->getSectionSize(SectionPimpl, Result);
	}

	inline error_code SectionRef::getContents(StringRef &Result) const {
	return OwningObject->getSectionContents(SectionPimpl, Result);
	}

	inline error_code SectionRef::getAlignment(uint64_t &Result) const {
	return OwningObject->getSectionAlignment(SectionPimpl, Result);
	}

	inline error_code SectionRef::isText(bool &Result) const {
	return OwningObject->isSectionText(SectionPimpl, Result);
	}

	inline error_code SectionRef::isData(bool &Result) const {
	return OwningObject->isSectionData(SectionPimpl, Result);
	}

	inline error_code SectionRef::isBSS(bool &Result) const {
	return OwningObject->isSectionBSS(SectionPimpl, Result);
	}

	inline error_code SectionRef::containsSymbol(SymbolRef S, bool &Result) const {
	return OwningObject->sectionContainsSymbol(SectionPimpl, S.SymbolPimpl,
	Result);
	}

	inline relocation_iterator SectionRef::begin_relocations() const {
	return OwningObject->getSectionRelBegin(SectionPimpl);
	}

	inline relocation_iterator SectionRef::end_relocations() const {
	return OwningObject->getSectionRelEnd(SectionPimpl);
	}


	/// RelocationRef
	inline RelocationRef::RelocationRef(DataRefImpl RelocationP,
	const ObjectFile *Owner)
	: RelocationPimpl(RelocationP)
	, OwningObject(Owner) {}

	inline bool RelocationRef::operator==(const RelocationRef &Other) const {
	return RelocationPimpl == Other.RelocationPimpl;
	}

	inline error_code RelocationRef::getNext(RelocationRef &Result) const {
	return OwningObject->getRelocationNext(RelocationPimpl, Result);
	}

	inline error_code RelocationRef::getAddress(uint64_t &Result) const {
	return OwningObject->getRelocationAddress(RelocationPimpl, Result);
	}

	inline error_code RelocationRef::getSymbol(SymbolRef &Result) const {
	return OwningObject->getRelocationSymbol(RelocationPimpl, Result);
	}

	inline error_code RelocationRef::getType(uint32_t &Result) const {
	return OwningObject->getRelocationType(RelocationPimpl, Result);
	}

	inline error_code RelocationRef::getTypeName(SmallVectorImpl<char> &Result)
	const {
	return OwningObject->getRelocationTypeName(RelocationPimpl, Result);
	}

	inline error_code RelocationRef::getAdditionalInfo(int64_t &Result) const {
	return OwningObject->getRelocationAdditionalInfo(RelocationPimpl, Result);
	}

	inline error_code RelocationRef::getValueString(SmallVectorImpl<char> &Result)
	const {
	return OwningObject->getRelocationValueString(RelocationPimpl, Result);
	}

	} // end namespace object
	} // end namespace llvm

	#endif