text: import vstruct
  from vstruct.primitives import *
  
  EI_NIDENT = 4
  EI_PADLEN = 7
  
  class Elf32(vstruct.VStruct):
      def __init__(self):
          vstruct.VStruct.__init__(self)
          self.e_ident       = v_bytes(EI_NIDENT)
          self.e_class       = v_uint8()
          self.e_data        = v_uint8()
          self.e_fileversion = v_uint8()
          self.e_osabi       = v_uint8()
          self.e_abiversio   = v_uint8()
          self.e_pad         = v_bytes(EI_PADLEN)
          self.e_type        = v_uint16()
          self.e_machine     = v_uint16()
          self.e_version     = v_uint32()
          self.e_entry       = v_uint32()
          self.e_phoff       = v_uint32()
          self.e_shoff       = v_uint32()
          self.e_flags       = v_uint32()
          self.e_ehsize      = v_uint16()
          self.e_phentsize   = v_uint16()
          self.e_phnum       = v_uint16()
          self.e_shentsize   = v_uint16()
          self.e_shnum       = v_uint16()
          self.e_shstrndx    = v_uint16()
  
  class Elf32Section(vstruct.VStruct):
      def __init__(self):
          vstruct.VStruct.__init__(self)
          self.sh_name      = v_uint32()
          self.sh_type      = v_uint32()
          self.sh_flags     = v_uint32()
          self.sh_addr      = v_uint32()
          self.sh_offset    = v_uint32()
          self.sh_size      = v_uint32()
          self.sh_link      = v_uint32()
          self.sh_info      = v_uint32()
          self.sh_addralign = v_uint32()
          self.sh_entsize = v_uint32()
  
  class Elf32Pheader(vstruct.VStruct):
      def __init__(self):
          vstruct.VStruct.__init__(self)
          self.p_type   = v_uint32()
          self.p_offset = v_uint32()
          self.p_vaddr  = v_uint32()
          self.p_paddr  = v_uint32()
          self.p_filesz = v_uint32()
          self.p_memsz  = v_uint32()
          self.p_flags  = v_uint32()
          self.p_align  = v_uint32()
  
  class Elf32Reloc(vstruct.VStruct):
      def __init__(self):
          vstruct.VStruct.__init__(self)
          self.r_offset = v_ptr32()
          self.r_info   = v_uint32()
  
  class Elf32Reloca(Elf32Reloc):
      def __init__(self):
          Elf32Reloc.__init__(self)
          self.r_addend = v_uint32()
  
  class Elf32Symbol(vstruct.VStruct):
      def __init__(self):
          vstruct.VStruct.__init__(self)
          self.st_name  = v_uint32()
          self.st_value = v_uint32()
          self.st_size  = v_uint32()
          self.st_info  = v_uint8()
          self.st_other = v_uint8()
          self.st_shndx = v_uint16()
  
  class Elf32Dynamic(vstruct.VStruct):
      def __init__(self):
          vstruct.VStruct.__init__(self)
          self.d_tag   = v_uint32()
          self.d_value = v_uint32()
  
  
  class Elf64(vstruct.VStruct):
      def __init__(self):
          vstruct.VStruct.__init__(self)
          self.e_ident       = v_bytes(EI_NIDENT)
          self.e_class       = v_uint8()
          self.e_data        = v_uint8()
          self.e_fileversion = v_uint8()
          self.e_osabi       = v_uint8()
          self.e_abiversio   = v_uint8()
          self.e_pad         = v_bytes(EI_PADLEN)
          self.e_type        = v_uint16()
          self.e_machine     = v_uint16()
          self.e_version     = v_uint32()
          self.e_entry       = v_uint64()
          self.e_phoff       = v_uint64()
          self.e_shoff       = v_uint64()
          self.e_flags       = v_uint32()
          self.e_ehsize      = v_uint16()
          self.e_phentsize   = v_uint16()
          self.e_phnum       = v_uint16()
          self.e_shentsize   = v_uint16()
          self.e_shnum       = v_uint16()
          self.e_shstrndx    = v_uint16()
  
  class Elf64Section(Elf32Section):
      def __init__(self):
          vstruct.VStruct.__init__(self)
          self.sh_name      = v_uint32()
          self.sh_type      = v_uint32()
          self.sh_flags     = v_uint64()
          self.sh_addr      = v_uint64()
          self.sh_offset    = v_uint64()
          self.sh_size      = v_uint64()
          self.sh_link      = v_uint32()
          self.sh_info      = v_uint32()
          self.sh_addralign = v_uint64()
          self.sh_entsize   = v_uint64()
  
  class Elf64Pheader(Elf32Pheader):
      def __init__(self):
          vstruct.VStruct.__init__(self)
          self.p_type   = v_uint32()
          self.p_flags  = v_uint32()
          self.p_offset = v_uint64()
          self.p_vaddr  = v_uint64()
          self.p_paddr  = v_uint64()
          self.p_filesz = v_uint64()
          self.p_memsz  = v_uint64()
          self.p_align  = v_uint64()
  
  
  class Elf64Reloc(vstruct.VStruct):
      def __init__(self):
          vstruct.VStruct.__init__(self)
          self.r_offset = v_ptr64()
          self.r_info   = v_uint64()
  
  class Elf64Reloca(Elf64Reloc):
      def __init__(self):
          #Elf64Reloc.__init__(self)
          vstruct.VStruct.__init__(self)
          self.r_offset = v_uint64()
          self.r_info   = v_uint64()
          self.r_addend = v_uint64()
  
  class Elf64Symbol(vstruct.VStruct):
      def __init__(self):
          vstruct.VStruct.__init__(self)
          self.st_name  = v_uint32()
          self.st_info  = v_uint8()
          self.st_other = v_uint8()
          self.st_shndx = v_uint16()
          self.st_value = v_uint64()
          self.st_size  = v_uint64()
  
  class Elf64Dynamic(Elf32Dynamic):
      def __init__(self):
          vstruct.VStruct.__init__(self)
          self.d_tag   = v_uint64()
          self.d_value = v_uint64()
  
  class ElfNote(vstruct.VStruct):
  
      def __init__(self):
          vstruct.VStruct.__init__(self)
          self.namesz = v_uint32()
          self.descsz = v_uint32()
          self.ntype  = v_uint32()
          self.name   = v_bytes()
          self.desc   = vstruct.VArray()
  
      def pcb_namesz(self):
          self['name'].vsSetLength( self.namesz )
  
      def pcb_descsz(self):
          elems = [ v_uint32() for i in xrange(self.descsz / 4) ]
          self.desc = vstruct.VArray(elems=elems)
  
  