def from_bytes(b):
e_ident, b = Elf32_e_ident.from_bytes(b)
# througout this function we rely only on ELF header regarding
# endianness
little = e_ident.EI_DATA is ELFDATA.ELFDATA2LSB
e_type, b = ET.from_bytes(b, little=little)
e_machine, b = EM.from_bytes(b, little=little)
# TODO: use Elf*_Word or similar to be able to create second header -
# Elf64_Ehdr for amd64
e_version, b = uint32.from_bytes(b, little=little)
e_entry, b = uint32.from_bytes(b, little=little) # || 64b
e_phoff, b = uint32.from_bytes(b, little=little) # || 64b
e_shoff, b = uint32.from_bytes(b, little=little) # || 64b
e_flags, b = uint32.from_bytes(b, little=little)
e_ehsize, b = uint16.from_bytes(b, little=little)
e_phentsize, b = uint16.from_bytes(b, little=little)
e_phnum, b = uint16.from_bytes(b, little=little)
e_shentsize, b = uint16.from_bytes(b, little=little)
e_shnum, b = uint16.from_bytes(b, little=little)
e_shstrndx, b = uint16.from_bytes(b, little=little)
Ehdr = Elf32_Ehdr(e_ident=e_ident, e_type=e_type, e_machine=e_machine,
e_version=e_version.integer, e_entry=e_entry.integer,
e_phoff=e_phoff.integer, e_shoff=e_shoff.integer,
e_flags=e_flags.integer, e_ehsize=e_ehsize.integer,
e_phentsize=e_phentsize.integer, e_phnum=e_phnum.integer,
e_shentsize=e_shentsize.integer, e_shnum=e_shnum.integer,
e_shstrndx=e_shstrndx.integer)
return Ehdr, b
def from_bytes(b, little=False):
r_offset, b = uint32.from_bytes(b, little)
r_info, b = uint32.from_bytes(b, little)
r_addend, b = uint32.from_bytes(b, little)
return Elf32_Phdr(r_offset=r_offset.integer,
r_info=r_info.integer,
r_addend=r_addend.integer,
little=little), b
def from_bytes(b, little=False):
st_name, b = uint32.from_bytes(b, little=little)
st_value, b = uint32.from_bytes(b, little=little)
st_size, b = uint32.from_bytes(b, little=little)
st_info, b = uint8.from_bytes(b, little=little)
st_other, b = uint8.from_bytes(b, little=little)
st_shndx, b = uint16.from_bytes(b, little=little)
return Elf32_Sym(st_name.integer, st_value.integer, st_size.integer,
st_info.integer, st_other.integer, st_shndx.integer, little), b
def from_bytes(b, little=False):
sh_name, b = uint32.from_bytes(b, little=little)
sh_type, b = uint32.from_bytes(b, little=little)
sh_flags, b = uint32.from_bytes(b, little=little)
sh_addr, b = uint32.from_bytes(b, little=little)
sh_offset, b = uint32.from_bytes(b, little=little)
sh_size, b = uint32.from_bytes(b, little=little)
sh_link, b = uint32.from_bytes(b, little=little)
sh_info, b = uint32.from_bytes(b, little=little)
sh_addralign, b = uint32.from_bytes(b, little=little)
sh_entsize, b = uint32.from_bytes(b, little=little)
return Elf32_Shdr(sh_name.integer, sh_type.integer, sh_flags.integer,
sh_addr.integer, sh_offset.integer, sh_size.integer,
sh_link.integer, sh_info.integer, sh_addralign.integer,
sh_entsize.integer, little=little), b
def from_bytes(b, little=False):
p_type, b = uint32.from_bytes(b, little)
p_offset, b = uint32.from_bytes(b, little)
p_vaddr, b = uint32.from_bytes(b, little)
p_paddr, b = uint32.from_bytes(b, little)
p_filesz, b = uint32.from_bytes(b, little)
p_memsz, b = uint32.from_bytes(b, little)
p_flags, b = uint32.from_bytes(b, little)
p_align, b = uint32.from_bytes(b, little)
return Elf32_Phdr(p_type=p_type.integer, p_offset=p_offset.integer,
p_vaddr=p_vaddr.integer, p_paddr=p_paddr.integer,
p_filesz=p_filesz.integer, p_memsz=p_memsz.integer,
p_flags=p_flags.integer, p_align=p_align.integer, little=little
), b
def from_bytes(b, little=False):
d_tag, b = uint32.from_bytes(b, little)
d_val, b = uint32.from_bytes(b, little)
d_ptr = d_val
return Elf32_Dyn(d_tag.integer, d_val.integer, d_ptr.integer,
little), b
