class MSCOFFWriter:
def __init__(self, output_path, abi, input_path=None):
from peachpy.formats.mscoff.image import Image
from peachpy.formats.mscoff.section import TextSection
self.output_path = output_path
self.previous_writer = None
self.abi = abi
self.image = Image(abi, input_path)
self.text_section = TextSection()
self.image.add_section(self.text_section, ".text")
def __enter__(self):
global active_writer
self.previous_writer = active_writer
active_writer = self
self.output_file = open(self.output_path, "w", buffering=0)
return self
def __exit__(self, exc_type, exc_value, traceback):
global active_writer
active_writer = self.previous_writer
self.previous_writer = None
if exc_type is None:
self.output_file.write(self.image.as_bytearray)
self.output_file.close()
self.output_file = None
else:
import os
os.unlink(self.output_file.name)
self.output_file = None
raise
def add_function(self, function):
import peachpy.x86_64.function
assert isinstance(function, peachpy.x86_64.function.ABIFunction), \
"Function must be bindinded to an ABI before its assembly can be used"
encoded_function = function.encode()
function_code = encoded_function.as_bytearray
function_offset = len(self.text_section.content)
self.text_section.write(function_code)
from peachpy.formats.mscoff.symbol import SymbolEntry, SymbolType, StorageClass
function_symbol = SymbolEntry()
function_symbol.value = function_offset
function_symbol.section_index = self.text_section.index
function_symbol.symbol_type = SymbolType.function
function_symbol.storage_class = StorageClass.external
self.image.add_symbol(function_symbol, function.name)
class MSCOFFWriter(ImageWriter):
def __init__(self, output_path, abi, input_path=None):
super(MSCOFFWriter, self).__init__(output_path)
from peachpy.formats.mscoff import Image, TextSection, ReadOnlyDataSection
self.output_path = output_path
self.abi = abi
self.image = Image(abi, input_path)
self.text_section = TextSection()
self.image.add_section(self.text_section)
self.rdata_section = ReadOnlyDataSection()
self.image.add_section(self.rdata_section)
def encode(self):
return self.image.encode()
def add_function(self, function):
import peachpy.x86_64.function
assert isinstance(function, peachpy.x86_64.function.ABIFunction), \
"Function must be finalized with an ABI before its assembly can be used"
from peachpy.util import roundup
from peachpy.formats.mscoff import Symbol, SymbolType, StorageClass, Relocation, RelocationType
encoded_function = function.encode()
code_offset = len(self.text_section.content)
code_padding = bytearray([encoded_function.code_section.alignment_byte] *
(roundup(code_offset, encoded_function.code_section.alignment) - code_offset))
self.text_section.content += code_padding
code_offset += len(code_padding)
self.text_section.content += encoded_function.code_section.content
self.text_section.alignment = \
max(self.text_section.alignment, encoded_function.code_section.alignment)
rdata_offset = self.rdata_section.content_size
rdata_padding = bytearray([encoded_function.const_section.alignment_byte] *
(roundup(rdata_offset, encoded_function.const_section.alignment) - rdata_offset))
self.rdata_section.content += rdata_padding
rdata_offset += len(rdata_padding)
self.rdata_section.content += encoded_function.const_section.content
self.rdata_section.alignment = \
max(self.rdata_section.alignment, encoded_function.const_section.alignment)
# Map from PeachPy symbol to Mach-O symbol
symbol_map = dict()
for symbol in encoded_function.const_section.symbols:
mscoff_symbol = Symbol()
mscoff_symbol.name = symbol.name
mscoff_symbol.value = rdata_offset + symbol.offset
mscoff_symbol.section = self.rdata_section
mscoff_symbol.symbol_type = SymbolType.non_function
mscoff_symbol.storage_class = StorageClass.static
self.image.add_symbol(mscoff_symbol)
symbol_map[symbol] = mscoff_symbol
for relocation in encoded_function.code_section.relocations:
relocation_type_map = {
4: RelocationType.x86_64_relocation_offset32,
5: RelocationType.x86_64_relocation_plus_1_offset32,
6: RelocationType.x86_64_relocation_plus_2_offset32,
7: RelocationType.x86_64_relocation_plus_3_offset32,
8: RelocationType.x86_64_relocation_plus_4_offset32,
9: RelocationType.x86_64_relocation_plus_5_offset32
}
relocation_type = relocation_type_map[relocation.program_counter - relocation.offset]
mscoff_relocation = Relocation(relocation_type,
code_offset + relocation.offset,
symbol_map[relocation.symbol])
self.text_section.relocations.append(mscoff_relocation)
function_symbol = Symbol()
function_symbol.name = function.mangled_name
function_symbol.value = code_offset
function_symbol.section = self.text_section
function_symbol.symbol_type = SymbolType.function
function_symbol.storage_class = StorageClass.external
self.image.add_symbol(function_symbol)
class MSCOFFWriter:
def __init__(self, output_path, abi, input_path=None):
from peachpy.formats.mscoff import Image, TextSection, ReadOnlyDataSection
self.output_path = output_path
self.previous_writer = None
self.abi = abi
self.image = Image(abi, input_path)
self.text_section = TextSection()
self.image.add_section(self.text_section)
self.rdata_section = ReadOnlyDataSection()
self.image.add_section(self.rdata_section)
def __enter__(self):
global active_writer
self.previous_writer = active_writer
active_writer = self
self.output_file = open(self.output_path, "w", buffering=0)
return self
def __exit__(self, exc_type, exc_value, traceback):
global active_writer
active_writer = self.previous_writer
self.previous_writer = None
if exc_type is None:
self.output_file.write(self.image.encode())
self.output_file.close()
self.output_file = None
else:
import os
os.unlink(self.output_file.name)
self.output_file = None
raise
def add_function(self, function):
import peachpy.x86_64.function
assert isinstance(function, peachpy.x86_64.function.ABIFunction), \
"Function must be bindinded to an ABI before its assembly can be used"
from peachpy.util import roundup
from peachpy.formats.mscoff import Symbol, SymbolType, StorageClass, Relocation, RelocationType
encoded_function = function.encode()
code_offset = len(self.text_section.content)
code_padding = bytearray([encoded_function.code_section.alignment_byte] *
(roundup(code_offset, encoded_function.code_section.alignment) - code_offset))
code_offset += len(code_padding)
self.text_section.content += encoded_function.code_section.content
self.text_section.alignment = \
max(self.text_section.alignment, encoded_function.code_section.alignment)
rdata_offset = self.rdata_section.content_size
rdata_padding = bytearray([encoded_function.const_section.alignment_byte] *
(roundup(rdata_offset, encoded_function.const_section.alignment) - rdata_offset))
self.rdata_section.content += rdata_padding
rdata_offset += len(rdata_padding)
self.rdata_section.content += encoded_function.const_section.content
self.rdata_section.alignment = \
max(self.rdata_section.alignment, encoded_function.const_section.alignment)
# Map from PeachPy symbol to Mach-O symbol
symbol_map = dict()
for symbol in encoded_function.const_section.symbols:
mscoff_symbol = Symbol()
mscoff_symbol.name = symbol.name
mscoff_symbol.value = rdata_offset + symbol.offset
mscoff_symbol.section = self.rdata_section
mscoff_symbol.symbol_type = SymbolType.non_function
mscoff_symbol.storage_class = StorageClass.static
self.image.add_symbol(mscoff_symbol)
symbol_map[symbol] = mscoff_symbol
for relocation in encoded_function.code_section.relocations:
mscoff_relocation = Relocation(RelocationType.x86_64_relocation_offset32,
code_offset + relocation.offset,
symbol_map[relocation.symbol])
self.text_section.relocations.append(mscoff_relocation)
function_symbol = Symbol()
function_symbol.name = function.name
function_symbol.value = code_offset
function_symbol.section = self.text_section
function_symbol.symbol_type = SymbolType.function
function_symbol.storage_class = StorageClass.external
self.image.add_symbol(function_symbol)
class MSCOFFWriter(ImageWriter):
def __init__(self, output_path, abi, input_path=None):
super(MSCOFFWriter, self).__init__(output_path)
from peachpy.formats.mscoff import Image, TextSection, ReadOnlyDataSection
self.output_path = output_path
self.abi = abi
self.image = Image(abi, input_path)
self.text_section = TextSection()
self.image.add_section(self.text_section)
self.rdata_section = ReadOnlyDataSection()
self.image.add_section(self.rdata_section)
def encode(self):
return self.image.encode()
def add_function(self, function):
import peachpy.x86_64.function
assert isinstance(function, peachpy.x86_64.function.ABIFunction), \
"Function must be finalized with an ABI before its assembly can be used"
from peachpy.util import roundup
from peachpy.formats.mscoff import Symbol, SymbolType, StorageClass, Relocation, RelocationType
encoded_function = function.encode()
code_offset = len(self.text_section.content)
code_padding = bytearray([encoded_function.code_section.alignment_byte] *
(roundup(code_offset, encoded_function.code_section.alignment) - code_offset))
code_offset += len(code_padding)
self.text_section.content += encoded_function.code_section.content
self.text_section.alignment = \
max(self.text_section.alignment, encoded_function.code_section.alignment)
rdata_offset = self.rdata_section.content_size
rdata_padding = bytearray([encoded_function.const_section.alignment_byte] *
(roundup(rdata_offset, encoded_function.const_section.alignment) - rdata_offset))
self.rdata_section.content += rdata_padding
rdata_offset += len(rdata_padding)
self.rdata_section.content += encoded_function.const_section.content
self.rdata_section.alignment = \
max(self.rdata_section.alignment, encoded_function.const_section.alignment)
# Map from PeachPy symbol to Mach-O symbol
symbol_map = dict()
for symbol in encoded_function.const_section.symbols:
mscoff_symbol = Symbol()
mscoff_symbol.name = symbol.name
mscoff_symbol.value = rdata_offset + symbol.offset
mscoff_symbol.section = self.rdata_section
mscoff_symbol.symbol_type = SymbolType.non_function
mscoff_symbol.storage_class = StorageClass.static
self.image.add_symbol(mscoff_symbol)
symbol_map[symbol] = mscoff_symbol
for relocation in encoded_function.code_section.relocations:
relocation_type_map = {
4: RelocationType.x86_64_relocation_offset32,
5: RelocationType.x86_64_relocation_plus_1_offset32,
6: RelocationType.x86_64_relocation_plus_2_offset32,
7: RelocationType.x86_64_relocation_plus_3_offset32,
8: RelocationType.x86_64_relocation_plus_4_offset32,
9: RelocationType.x86_64_relocation_plus_5_offset32
}
relocation_type = relocation_type_map[relocation.program_counter - relocation.offset]
mscoff_relocation = Relocation(relocation_type,
code_offset + relocation.offset,
symbol_map[relocation.symbol])
self.text_section.relocations.append(mscoff_relocation)
function_symbol = Symbol()
function_symbol.name = function.mangled_name
function_symbol.value = code_offset
function_symbol.section = self.text_section
function_symbol.symbol_type = SymbolType.function
function_symbol.storage_class = StorageClass.external
self.image.add_symbol(function_symbol)
