lld/lib/ReaderWriter/ELF/HeaderChunks.h - toolchain/llvm-project - Gitiles

 //===- lib/ReaderWriter/ELF/HeaderChunks.h --------------------------------===//
 //
 //                             The LLVM Linker
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//

 #ifndef LLD_READER_WRITER_ELF_HEADER_CHUNKS_H
 #define LLD_READER_WRITER_ELF_HEADER_CHUNKS_H

 #include "SegmentChunks.h"

 #include "llvm/Object/ELF.h"
 #include "llvm/Support/Allocator.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/ELF.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/FileOutputBuffer.h"

 /// \brief An Header represents the Elf[32/64]_Ehdr structure at the
 ///        start of an ELF executable file.
 namespace lld {
 namespace elf {
 template<class ELFT>
 class Header : public Chunk<ELFT> {
 public:
   typedef llvm::object::Elf_Ehdr_Impl<ELFT> Elf_Ehdr;

   Header(const ELFTargetInfo &);

   void e_ident(int I, unsigned char C) { _eh.e_ident[I] = C; }
   void e_type(uint16_t type)           { _eh.e_type = type; }
   void e_machine(uint16_t machine)     { _eh.e_machine = machine; }
   void e_version(uint32_t version)     { _eh.e_version = version; }
   void e_entry(int64_t entry)         { _eh.e_entry = entry; }
   void e_phoff(int64_t phoff)         { _eh.e_phoff = phoff; }
   void e_shoff(int64_t shoff)         { _eh.e_shoff = shoff; }
   void e_flags(uint32_t flags)         { _eh.e_flags = flags; }
   void e_ehsize(uint16_t ehsize)       { _eh.e_ehsize = ehsize; }
   void e_phentsize(uint16_t phentsize) { _eh.e_phentsize = phentsize; }
   void e_phnum(uint16_t phnum)         { _eh.e_phnum = phnum; }
   void e_shentsize(uint16_t shentsize) { _eh.e_shentsize = shentsize; }
   void e_shnum(uint16_t shnum)         { _eh.e_shnum = shnum; }
   void e_shstrndx(uint16_t shstrndx)   { _eh.e_shstrndx = shstrndx; }
   uint64_t  fileSize()                 { return sizeof (Elf_Ehdr); }

   static inline bool classof(const Chunk<ELFT> *c) {
     return c->Kind() == Chunk<ELFT>::K_Header;
   }

   void write(ELFWriter *writer, llvm::FileOutputBuffer &buffer);

   void finalize() { }

 private:
   Elf_Ehdr _eh;
 };

 template <class ELFT>
 Header<ELFT>::Header(const ELFTargetInfo &ti)
     : Chunk<ELFT>("elfhdr", Chunk<ELFT>::K_Header, ti) {
   this->_align2 = ELFT::Is64Bits ? 8 : 4;
   this->_fsize = sizeof(Elf_Ehdr);
   this->_msize = sizeof(Elf_Ehdr);
   memset(_eh.e_ident, 0, llvm::ELF::EI_NIDENT);
   e_ident(llvm::ELF::EI_MAG0, 0x7f);
   e_ident(llvm::ELF::EI_MAG1, 'E');
   e_ident(llvm::ELF::EI_MAG2, 'L');
   e_ident(llvm::ELF::EI_MAG3, 'F');
   e_ehsize(sizeof(Elf_Ehdr));
   e_flags(2);
 }

 template <class ELFT>
 void Header<ELFT>::write(ELFWriter *writer, llvm::FileOutputBuffer &buffer) {
   uint8_t *chunkBuffer = buffer.getBufferStart();
   uint8_t *atomContent = chunkBuffer + this->fileOffset();
   memcpy(atomContent, &_eh, fileSize());
 }

 /// \brief An ProgramHeader represents the Elf[32/64]_Phdr structure at the
 ///        start of an ELF executable file.
 template<class ELFT>
 class ProgramHeader : public Chunk<ELFT> {
 public:
   typedef llvm::object::Elf_Phdr_Impl<ELFT> Elf_Phdr;
   typedef typename std::vector<Elf_Phdr *>::iterator PhIterT;

   /// \brief Find a program header entry, given the type of entry that
   /// we are looking for
   class FindPhdr {
   public:
     FindPhdr(uint64_t type, uint64_t flags, uint64_t flagsClear)
              : _type(type)
              , _flags(flags)
              , _flagsClear(flagsClear)
     {}

     bool operator()(const Elf_Phdr *j) const {
       return ((j->p_type == _type) &&
               ((j->p_flags & _flags) == _flags) &&
               (!(j->p_flags & _flagsClear)));
     }
   private:
     uint64_t _type;
     uint64_t _flags;
     uint64_t _flagsClear;
   };

   ProgramHeader(const ELFTargetInfo &ti)
       : Chunk<ELFT>("elfphdr", Chunk<ELFT>::K_ProgramHeader, ti) {
     this->_align2 = ELFT::Is64Bits ? 8 : 4;
     resetProgramHeaders();
   }

   bool addSegment(Segment<ELFT> *segment);

   void resetProgramHeaders() {
     _phi = _ph.begin();
   }

   uint64_t  fileSize() {
     return sizeof(Elf_Phdr) * _ph.size();
   }

   static inline bool classof(const Chunk<ELFT> *c) {
     return c->Kind() == Chunk<ELFT>::K_ProgramHeader;
   }

   void write(ELFWriter *writer, llvm::FileOutputBuffer &buffer);

   /// \brief find a program header entry in the list of program headers
   PhIterT findProgramHeader(uint64_t type, uint64_t flags, uint64_t flagClear) {
     return std::find_if(_ph.begin(), _ph.end(),
                         FindPhdr(type, flags, flagClear));
   }

   PhIterT begin() {
     return _ph.begin();
   }

   PhIterT end() {
     return _ph.end();
   }

   void finalize() { }

   int64_t entsize() {
     return sizeof(Elf_Phdr);
   }

   int64_t numHeaders() {
     return _ph.size();
   }

 private:
   std::pair<Elf_Phdr *, bool> allocateProgramHeader() {
     Elf_Phdr *phdr;
     bool ret = false;
     if (_phi == _ph.end()) {
       phdr = new (_allocator) Elf_Phdr;
       _ph.push_back(phdr);
       _phi = _ph.end();
       ret = true;
     } else {
       phdr = (*_phi);
       ++_phi;
     }

     return std::make_pair(phdr, ret);
   }

   std::vector<Elf_Phdr *> _ph;
   PhIterT _phi;
   llvm::BumpPtrAllocator _allocator;
 };

 template <class ELFT>
 bool ProgramHeader<ELFT>::addSegment(Segment<ELFT> *segment) {
   bool allocatedNew = false;
   for (auto slice : segment->slices()) {
     // If we have a TLS segment, emit a LOAD first.
     if (segment->segmentType() == llvm::ELF::PT_TLS ||
         segment->segmentType() == llvm::ELF::PT_DYNAMIC) {
       auto phdr = allocateProgramHeader();
       if (phdr.second)
         allocatedNew = true;
       phdr.first->p_type = llvm::ELF::PT_LOAD;
       phdr.first->p_offset = slice->fileOffset();
       phdr.first->p_vaddr = slice->virtualAddr();
       phdr.first->p_paddr = slice->virtualAddr();
       phdr.first->p_filesz = slice->fileSize();
       phdr.first->p_memsz = slice->memSize();
       phdr.first->p_flags = segment->flags();
       phdr.first->p_align = segment->pageSize();
     }
     auto phdr = allocateProgramHeader();
     if (phdr.second)
       allocatedNew = true;
     phdr.first->p_type = segment->segmentType();
     phdr.first->p_offset = slice->fileOffset();
     phdr.first->p_vaddr = slice->virtualAddr();
     phdr.first->p_paddr = slice->virtualAddr();
     phdr.first->p_filesz = slice->fileSize();
     phdr.first->p_memsz = slice->memSize();
     phdr.first->p_flags = segment->flags();
     phdr.first->p_align = (phdr.first->p_type == llvm::ELF::PT_LOAD) ?
                           segment->pageSize() : slice->align2();
   }
   this->_fsize = fileSize();
   this->_msize = this->_fsize;

   return allocatedNew;
 }

 template <class ELFT>
 void ProgramHeader<ELFT>::write(ELFWriter *writer,
                                    llvm::FileOutputBuffer &buffer) {
   uint8_t *chunkBuffer = buffer.getBufferStart();
   uint8_t *dest = chunkBuffer + this->fileOffset();
   for (auto phi : _ph) {
     memcpy(dest, phi, sizeof(Elf_Phdr));
     dest += sizeof(Elf_Phdr);
   }
 }

 /// \brief An SectionHeader represents the Elf[32/64]_Shdr structure
 /// at the end of the file
 template<class ELFT>
 class SectionHeader : public Chunk<ELFT> {
 public:
   typedef llvm::object::Elf_Shdr_Impl<ELFT> Elf_Shdr;

   SectionHeader(const ELFTargetInfo &, int32_t order);

   void appendSection(MergedSections<ELFT> *section);

   void updateSection(Section<ELFT> *section);

   static inline bool classof(const Chunk<ELFT> *c) {
     return c->getChunkKind() == Chunk<ELFT>::K_SectionHeader;
   }

   void setStringSection(StringTable<ELFT> *s) {
     _stringSection = s;
   }

   void write(ELFWriter *writer, llvm::FileOutputBuffer &buffer);

   void finalize() { }

   inline uint16_t fileSize() {
     return sizeof(Elf_Shdr) * _sectionInfo.size();
   }

   inline int64_t entsize() {
     return sizeof(Elf_Shdr);
   }

   inline int64_t numHeaders() {
     return _sectionInfo.size();
   }

 private:
   StringTable<ELFT> *_stringSection;
   std::vector<Elf_Shdr*>                  _sectionInfo;
   llvm::BumpPtrAllocator                  _sectionAllocate;
 };

 template <class ELFT>
 SectionHeader<ELFT>::SectionHeader(const ELFTargetInfo &ti, int32_t order)
     : Chunk<ELFT>("shdr", Chunk<ELFT>::K_SectionHeader, ti) {
   this->_fsize = 0;
   this->_align2 = 8;
   this->setOrder(order);
   // The first element in the list is always NULL
   Elf_Shdr *nullshdr = new (_sectionAllocate.Allocate<Elf_Shdr>()) Elf_Shdr;
   ::memset(nullshdr, 0, sizeof (Elf_Shdr));
   _sectionInfo.push_back(nullshdr);
   this->_fsize += sizeof (Elf_Shdr);
 }

 template<class ELFT>
 void
 SectionHeader<ELFT>::appendSection(MergedSections<ELFT> *section) {
   Elf_Shdr *shdr = new (_sectionAllocate.Allocate<Elf_Shdr>()) Elf_Shdr;
   shdr->sh_name   = _stringSection->addString(section->name());
   shdr->sh_type   = section->type();
   shdr->sh_flags  = section->flags();
   shdr->sh_offset = section->fileOffset();
   shdr->sh_addr   = section->virtualAddr();
   shdr->sh_size   = section->memSize();
   shdr->sh_link   = section->link();
   shdr->sh_info   = section->shinfo();
   shdr->sh_addralign = section->align2();
   shdr->sh_entsize = section->entsize();
   _sectionInfo.push_back(shdr);
 }

 template<class ELFT>
 void
 SectionHeader<ELFT>::updateSection(Section<ELFT> *section) {
   Elf_Shdr *shdr = _sectionInfo[section->ordinal()];
   shdr->sh_type = section->getType();
   shdr->sh_flags = section->getFlags();
   shdr->sh_offset = section->fileOffset();
   shdr->sh_addr   = section->virtualAddr();
   shdr->sh_size   = section->fileSize();
   shdr->sh_link = section->getLink();
   shdr->sh_info = section->getInfo();
   shdr->sh_addralign = section->align2();
   shdr->sh_entsize = section->getEntSize();
 }

 template <class ELFT>
 void SectionHeader<ELFT>::write(ELFWriter *writer,
                                    llvm::FileOutputBuffer &buffer) {
   uint8_t *chunkBuffer = buffer.getBufferStart();
   uint8_t *dest = chunkBuffer + this->fileOffset();
   for (auto shi : _sectionInfo) {
     memcpy(dest, shi, sizeof(Elf_Shdr));
     dest += sizeof(Elf_Shdr);
   }
   _stringSection->write(writer, buffer);
 }
 } // end namespace elf
 } // end namespace lld

 #endif
	//===- lib/ReaderWriter/ELF/HeaderChunks.h --------------------------------===//
	//
	// The LLVM Linker
	//
	// This file is distributed under the University of Illinois Open Source
	// License. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//

	#ifndef LLD_READER_WRITER_ELF_HEADER_CHUNKS_H
	#define LLD_READER_WRITER_ELF_HEADER_CHUNKS_H

	#include "SegmentChunks.h"

	#include "llvm/Object/ELF.h"
	#include "llvm/Support/Allocator.h"
	#include "llvm/Support/Debug.h"
	#include "llvm/Support/ELF.h"
	#include "llvm/Support/ErrorHandling.h"
	#include "llvm/Support/FileOutputBuffer.h"

	/// \brief An Header represents the Elf[32/64]_Ehdr structure at the
	/// start of an ELF executable file.
	namespace lld {
	namespace elf {
	template<class ELFT>
	class Header : public Chunk<ELFT> {
	public:
	typedef llvm::object::Elf_Ehdr_Impl<ELFT> Elf_Ehdr;

	Header(const ELFTargetInfo &);

	void e_ident(int I, unsigned char C) { _eh.e_ident[I] = C; }
	void e_type(uint16_t type) { _eh.e_type = type; }
	void e_machine(uint16_t machine) { _eh.e_machine = machine; }
	void e_version(uint32_t version) { _eh.e_version = version; }
	void e_entry(int64_t entry) { _eh.e_entry = entry; }
	void e_phoff(int64_t phoff) { _eh.e_phoff = phoff; }
	void e_shoff(int64_t shoff) { _eh.e_shoff = shoff; }
	void e_flags(uint32_t flags) { _eh.e_flags = flags; }
	void e_ehsize(uint16_t ehsize) { _eh.e_ehsize = ehsize; }
	void e_phentsize(uint16_t phentsize) { _eh.e_phentsize = phentsize; }
	void e_phnum(uint16_t phnum) { _eh.e_phnum = phnum; }
	void e_shentsize(uint16_t shentsize) { _eh.e_shentsize = shentsize; }
	void e_shnum(uint16_t shnum) { _eh.e_shnum = shnum; }
	void e_shstrndx(uint16_t shstrndx) { _eh.e_shstrndx = shstrndx; }
	uint64_t fileSize() { return sizeof (Elf_Ehdr); }

	static inline bool classof(const Chunk<ELFT> *c) {
	return c->Kind() == Chunk<ELFT>::K_Header;
	}

	void write(ELFWriter *writer, llvm::FileOutputBuffer &buffer);

	void finalize() { }

	private:
	Elf_Ehdr _eh;
	};

	template <class ELFT>
	Header<ELFT>::Header(const ELFTargetInfo &ti)
	: Chunk<ELFT>("elfhdr", Chunk<ELFT>::K_Header, ti) {
	this->_align2 = ELFT::Is64Bits ? 8 : 4;
	this->_fsize = sizeof(Elf_Ehdr);
	this->_msize = sizeof(Elf_Ehdr);
	memset(_eh.e_ident, 0, llvm::ELF::EI_NIDENT);
	e_ident(llvm::ELF::EI_MAG0, 0x7f);
	e_ident(llvm::ELF::EI_MAG1, 'E');
	e_ident(llvm::ELF::EI_MAG2, 'L');
	e_ident(llvm::ELF::EI_MAG3, 'F');
	e_ehsize(sizeof(Elf_Ehdr));
	e_flags(2);
	}

	template <class ELFT>
	void Header<ELFT>::write(ELFWriter *writer, llvm::FileOutputBuffer &buffer) {
	uint8_t *chunkBuffer = buffer.getBufferStart();
	uint8_t *atomContent = chunkBuffer + this->fileOffset();
	memcpy(atomContent, &_eh, fileSize());
	}

	/// \brief An ProgramHeader represents the Elf[32/64]_Phdr structure at the
	/// start of an ELF executable file.
	template<class ELFT>
	class ProgramHeader : public Chunk<ELFT> {
	public:
	typedef llvm::object::Elf_Phdr_Impl<ELFT> Elf_Phdr;
	typedef typename std::vector<Elf_Phdr *>::iterator PhIterT;

	/// \brief Find a program header entry, given the type of entry that
	/// we are looking for
	class FindPhdr {
	public:
	FindPhdr(uint64_t type, uint64_t flags, uint64_t flagsClear)
	: _type(type)
	, _flags(flags)
	, _flagsClear(flagsClear)
	{}

	bool operator()(const Elf_Phdr *j) const {
	return ((j->p_type == _type) &&
	((j->p_flags & _flags) == _flags) &&
	(!(j->p_flags & _flagsClear)));
	}
	private:
	uint64_t _type;
	uint64_t _flags;
	uint64_t _flagsClear;
	};

	ProgramHeader(const ELFTargetInfo &ti)
	: Chunk<ELFT>("elfphdr", Chunk<ELFT>::K_ProgramHeader, ti) {
	this->_align2 = ELFT::Is64Bits ? 8 : 4;
	resetProgramHeaders();
	}

	bool addSegment(Segment<ELFT> *segment);

	void resetProgramHeaders() {
	_phi = _ph.begin();
	}

	uint64_t fileSize() {
	return sizeof(Elf_Phdr) * _ph.size();
	}

	static inline bool classof(const Chunk<ELFT> *c) {
	return c->Kind() == Chunk<ELFT>::K_ProgramHeader;
	}

	void write(ELFWriter *writer, llvm::FileOutputBuffer &buffer);

	/// \brief find a program header entry in the list of program headers
	PhIterT findProgramHeader(uint64_t type, uint64_t flags, uint64_t flagClear) {
	return std::find_if(_ph.begin(), _ph.end(),
	FindPhdr(type, flags, flagClear));
	}

	PhIterT begin() {
	return _ph.begin();
	}

	PhIterT end() {
	return _ph.end();
	}

	void finalize() { }

	int64_t entsize() {
	return sizeof(Elf_Phdr);
	}

	int64_t numHeaders() {
	return _ph.size();
	}

	private:
	std::pair<Elf_Phdr *, bool> allocateProgramHeader() {
	Elf_Phdr *phdr;
	bool ret = false;
	if (_phi == _ph.end()) {
	phdr = new (_allocator) Elf_Phdr;
	_ph.push_back(phdr);
	_phi = _ph.end();
	ret = true;
	} else {
	phdr = (*_phi);
	++_phi;
	}

	return std::make_pair(phdr, ret);
	}

	std::vector<Elf_Phdr *> _ph;
	PhIterT _phi;
	llvm::BumpPtrAllocator _allocator;
	};

	template <class ELFT>
	bool ProgramHeader<ELFT>::addSegment(Segment<ELFT> *segment) {
	bool allocatedNew = false;
	for (auto slice : segment->slices()) {
	// If we have a TLS segment, emit a LOAD first.
	if (segment->segmentType() == llvm::ELF::PT_TLS \|\|
	segment->segmentType() == llvm::ELF::PT_DYNAMIC) {
	auto phdr = allocateProgramHeader();
	if (phdr.second)
	allocatedNew = true;
	phdr.first->p_type = llvm::ELF::PT_LOAD;
	phdr.first->p_offset = slice->fileOffset();
	phdr.first->p_vaddr = slice->virtualAddr();
	phdr.first->p_paddr = slice->virtualAddr();
	phdr.first->p_filesz = slice->fileSize();
	phdr.first->p_memsz = slice->memSize();
	phdr.first->p_flags = segment->flags();
	phdr.first->p_align = segment->pageSize();
	}
	auto phdr = allocateProgramHeader();
	if (phdr.second)
	allocatedNew = true;
	phdr.first->p_type = segment->segmentType();
	phdr.first->p_offset = slice->fileOffset();
	phdr.first->p_vaddr = slice->virtualAddr();
	phdr.first->p_paddr = slice->virtualAddr();
	phdr.first->p_filesz = slice->fileSize();
	phdr.first->p_memsz = slice->memSize();
	phdr.first->p_flags = segment->flags();
	phdr.first->p_align = (phdr.first->p_type == llvm::ELF::PT_LOAD) ?
	segment->pageSize() : slice->align2();
	}
	this->_fsize = fileSize();
	this->_msize = this->_fsize;

	return allocatedNew;
	}

	template <class ELFT>
	void ProgramHeader<ELFT>::write(ELFWriter *writer,
	llvm::FileOutputBuffer &buffer) {
	uint8_t *chunkBuffer = buffer.getBufferStart();
	uint8_t *dest = chunkBuffer + this->fileOffset();
	for (auto phi : _ph) {
	memcpy(dest, phi, sizeof(Elf_Phdr));
	dest += sizeof(Elf_Phdr);
	}
	}

	/// \brief An SectionHeader represents the Elf[32/64]_Shdr structure
	/// at the end of the file
	template<class ELFT>
	class SectionHeader : public Chunk<ELFT> {
	public:
	typedef llvm::object::Elf_Shdr_Impl<ELFT> Elf_Shdr;

	SectionHeader(const ELFTargetInfo &, int32_t order);

	void appendSection(MergedSections<ELFT> *section);

	void updateSection(Section<ELFT> *section);

	static inline bool classof(const Chunk<ELFT> *c) {
	return c->getChunkKind() == Chunk<ELFT>::K_SectionHeader;
	}

	void setStringSection(StringTable<ELFT> *s) {
	_stringSection = s;
	}

	void write(ELFWriter *writer, llvm::FileOutputBuffer &buffer);

	void finalize() { }

	inline uint16_t fileSize() {
	return sizeof(Elf_Shdr) * _sectionInfo.size();
	}

	inline int64_t entsize() {
	return sizeof(Elf_Shdr);
	}

	inline int64_t numHeaders() {
	return _sectionInfo.size();
	}

	private:
	StringTable<ELFT> *_stringSection;
	std::vector<Elf_Shdr*> _sectionInfo;
	llvm::BumpPtrAllocator _sectionAllocate;
	};

	template <class ELFT>
	SectionHeader<ELFT>::SectionHeader(const ELFTargetInfo &ti, int32_t order)
	: Chunk<ELFT>("shdr", Chunk<ELFT>::K_SectionHeader, ti) {
	this->_fsize = 0;
	this->_align2 = 8;
	this->setOrder(order);
	// The first element in the list is always NULL
	Elf_Shdr *nullshdr = new (_sectionAllocate.Allocate<Elf_Shdr>()) Elf_Shdr;
	::memset(nullshdr, 0, sizeof (Elf_Shdr));
	_sectionInfo.push_back(nullshdr);
	this->_fsize += sizeof (Elf_Shdr);
	}

	template<class ELFT>
	void
	SectionHeader<ELFT>::appendSection(MergedSections<ELFT> *section) {
	Elf_Shdr *shdr = new (_sectionAllocate.Allocate<Elf_Shdr>()) Elf_Shdr;
	shdr->sh_name = _stringSection->addString(section->name());
	shdr->sh_type = section->type();
	shdr->sh_flags = section->flags();
	shdr->sh_offset = section->fileOffset();
	shdr->sh_addr = section->virtualAddr();
	shdr->sh_size = section->memSize();
	shdr->sh_link = section->link();
	shdr->sh_info = section->shinfo();
	shdr->sh_addralign = section->align2();
	shdr->sh_entsize = section->entsize();
	_sectionInfo.push_back(shdr);
	}

	template<class ELFT>
	void
	SectionHeader<ELFT>::updateSection(Section<ELFT> *section) {
	Elf_Shdr *shdr = _sectionInfo[section->ordinal()];
	shdr->sh_type = section->getType();
	shdr->sh_flags = section->getFlags();
	shdr->sh_offset = section->fileOffset();
	shdr->sh_addr = section->virtualAddr();
	shdr->sh_size = section->fileSize();
	shdr->sh_link = section->getLink();
	shdr->sh_info = section->getInfo();
	shdr->sh_addralign = section->align2();
	shdr->sh_entsize = section->getEntSize();
	}

	template <class ELFT>
	void SectionHeader<ELFT>::write(ELFWriter *writer,
	llvm::FileOutputBuffer &buffer) {
	uint8_t *chunkBuffer = buffer.getBufferStart();
	uint8_t *dest = chunkBuffer + this->fileOffset();
	for (auto shi : _sectionInfo) {
	memcpy(dest, shi, sizeof(Elf_Shdr));
	dest += sizeof(Elf_Shdr);
	}
	_stringSection->write(writer, buffer);
	}
	} // end namespace elf
	} // end namespace lld

	#endif