def encode_header(self,
encoder,
name_index_map,
section_index_map,
offset,
address=None,
link_section=None,
info=None,
content_size=0,
entry_size=0):
import peachpy.encoder
from peachpy.util import is_uint64, is_uint32
assert isinstance(encoder, peachpy.encoder.Encoder)
assert isinstance(name_index_map, dict)
assert section_index_map is None or isinstance(section_index_map, dict)
assert offset is None or is_uint64(offset)
assert address is None or is_uint64(address)
assert link_section is None or isinstance(link_section, Section)
assert info is None or is_uint64(info)
assert is_uint64(content_size)
assert is_uint32(entry_size)
assert encoder.bitness in [32, 64]
if encoder.bitness == 32:
assert offset is None or is_uint32(offset)
assert address is None or is_uint32(address)
assert self.name is None or self.name in name_index_map
assert section_index_map is not None or link_section is None
name_index = name_index_map.get(self.name, 0)
if address is None:
address = 0
if offset is None:
offset = 0
link = 0
if link_section is not None:
link = section_index_map[link_section]
if info is None:
info = 0
return encoder.uint32(name_index) + \
encoder.uint32(self.type) + \
encoder.unsigned_offset(self.flags) + \
encoder.unsigned_offset(address) + \
encoder.unsigned_offset(offset) + \
encoder.unsigned_offset(content_size) + \
encoder.uint32(link) + \
encoder.uint32(info) + \
encoder.unsigned_offset(self.alignment) + \
encoder.unsigned_offset(entry_size)
def alignment(self, alignment):
from peachpy.util import is_uint32
if not is_uint32(alignment):
raise TypeError("Section alignment %s is not representable as a 32-bit unsigned integer" % str(alignment))
if alignment & (alignment - 1) != 0:
raise ValueError("Section alignment %d is not a power of 2" % alignment)
if alignment == 0:
alignment = 1
self._alignment = alignment
def encode_header(self, encoder, name_index_map, section_index_map, offset,
address=None, link_section=None, info=None,
content_size=0, entry_size=0):
import peachpy.encoder
from peachpy.util import is_uint64, is_uint32
assert isinstance(encoder, peachpy.encoder.Encoder)
assert isinstance(name_index_map, dict)
assert section_index_map is None or isinstance(section_index_map, dict)
assert offset is None or is_uint64(offset)
assert address is None or is_uint64(address)
assert link_section is None or isinstance(link_section, Section)
assert info is None or is_uint64(info)
assert is_uint64(content_size)
assert is_uint32(entry_size)
assert encoder.bitness in [32, 64]
if encoder.bitness == 32:
assert offset is None or is_uint32(offset)
assert address is None or is_uint32(address)
assert self.name is None or self.name in name_index_map
assert section_index_map is not None or link_section is None
name_index = name_index_map.get(self.name, 0)
if address is None:
address = 0
if offset is None:
offset = 0
link = 0
if link_section is not None:
link = section_index_map[link_section]
if info is None:
info = 0
return encoder.uint32(name_index) + \
encoder.uint32(self.type) + \
encoder.unsigned_offset(self.flags) + \
encoder.unsigned_offset(address) + \
encoder.unsigned_offset(offset) + \
encoder.unsigned_offset(content_size) + \
encoder.uint32(link) + \
encoder.uint32(info) + \
encoder.unsigned_offset(self.alignment) + \
encoder.unsigned_offset(entry_size)
def __init__(self, type, offset, symbol):
from peachpy.util import is_int, is_uint32
if not isinstance(type, RelocationType):
raise TypeError("Relocation type %s is not in RelocationType enumeration" % str(type))
if not is_int(offset):
raise TypeError("Offset %s is not an integer" % str(offset))
if not is_uint32(offset):
raise ValueError("Offset %d can not be represented as a 32-bit unsigned integer" % offset)
if not isinstance(symbol, Symbol):
raise TypeError("Symbol %s is not an instance of Symbol type" % str(symbol))
self.type = type
self.offset = offset
self.symbol = symbol
def __init__(self, name, flags, alignment=None):
from peachpy.util import is_uint32
if not isinstance(name, str):
raise TypeError("Section name %s is not a string" % str(name))
if not is_uint32(flags):
raise TypeError("Flags %s are not representable as a 32-bit unsigned integer" % str(flags))
super(Section, self).__init__()
# Section name
self.name = name
# Flags for the section
self.flags = (flags & ~Section._alignment_mask) | Section._alignment_flag_map[1]
if alignment is not None:
self.alignment = alignment
self.relocations = list()
self.content = bytearray()
def __init__(self, type, offset, symbol):
from peachpy.util import is_int, is_uint32
if not isinstance(type, RelocationType):
raise TypeError(
"Relocation type %s is not in RelocationType enumeration" %
str(type))
if not is_int(offset):
raise TypeError("Offset %s is not an integer" % str(offset))
if not is_uint32(offset):
raise ValueError(
"Offset %d can not be represented as a 32-bit unsigned integer"
% offset)
if not isinstance(symbol, Symbol):
raise TypeError("Symbol %s is not an instance of Symbol type" %
str(symbol))
self.type = type
self.offset = offset
self.symbol = symbol
def __init__(self, name, flags, alignment=None):
from peachpy.util import is_uint32
if not isinstance(name, str):
raise TypeError("Section name %s is not a string" % str(name))
if not is_uint32(flags):
raise TypeError(
"Flags %s are not representable as a 32-bit unsigned integer" %
str(flags))
super(Section, self).__init__()
# Section name
self.name = name
# Flags for the section
self.flags = (
flags & ~Section._alignment_mask) | Section._alignment_flag_map[1]
if alignment is not None:
self.alignment = alignment
self.relocations = list()
self.content = bytearray()