def __init__(self, output_path, abi):
super(MachOWriter, self).__init__(output_path)
from peachpy.formats.macho.image import Image
self.abi = abi
self.image = Image(abi)
def __init__(self, output_path, abi):
from peachpy.formats.macho.image import Image
self.output_path = output_path
self.previous_writer = None
self.abi = abi
self.image = Image(abi)
def __init__(self, output_path, abi, input_path=None):
from peachpy.formats.elf.image import Image
from peachpy.formats.elf.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(abi)
self.image.bind_section(self.text_section, ".text")
class ELFWriter:
def __init__(self, output_path, abi, input_path=None):
from peachpy.formats.elf.image import Image
from peachpy.formats.elf.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(abi)
self.image.bind_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.image.symtab.bind()
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.append(function_code)
from peachpy.formats.elf.symbol import Symbol, SymbolBinding, SymbolType
function_symbol = Symbol(self.abi)
function_symbol.name_index = self.image.strtab.add(function.name)
function_symbol.value = function_offset
function_symbol.content_size = len(function_code)
function_symbol.section_index = self.text_section.index
function_symbol.binding = SymbolBinding.Global
function_symbol.type = SymbolType.Function
self.image.symtab.add(function_symbol)
def __init__(self, output_path, abi, input_path=None):
super(ELFWriter, self).__init__(output_path)
from peachpy.formats.elf.image import Image
from peachpy.formats.elf.section import TextSection
self.abi = abi
self.image = Image(abi, input_path)
self.text_section = TextSection()
self.image.add_section(self.text_section)
self.text_rela_section = None
self.rodata_section = None
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 __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 __init__(self, output_path, abi, input_path=None):
super(ELFWriter, self).__init__(output_path)
from peachpy.formats.elf.image import Image
from peachpy.formats.elf.section import TextSection, ProgramBitsSection
self.abi = abi
self.image = Image(abi, input_path)
self.text_section = TextSection()
self.image.add_section(self.text_section)
self.gnu_stack_section = ProgramBitsSection(".note.GNU-stack", allocate=False)
self.image.add_section(self.gnu_stack_section)
self.text_rela_section = None
self.rodata_section = None
def __init__(self, output_path, abi):
super(MachOWriter, self).__init__(output_path)
from peachpy.formats.macho.image import Image
self.abi = abi
self.image = Image(abi)
def __init__(self, output_path, abi, input_path=None):
super(ELFWriter, self).__init__(output_path)
from peachpy.formats.elf.image import Image
from peachpy.formats.elf.section import TextSection
self.abi = abi
self.image = Image(abi, input_path)
self.text_section = TextSection()
self.image.add_section(self.text_section)
self.text_rela_section = None
self.rodata_section = None
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)
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 ELFWriter(ImageWriter):
def __init__(self, output_path, abi, input_path=None):
super(ELFWriter, self).__init__(output_path)
from peachpy.formats.elf.image import Image
from peachpy.formats.elf.section import TextSection
self.abi = abi
self.image = Image(abi, input_path)
self.text_section = TextSection()
self.image.add_section(self.text_section)
self.text_rela_section = None
self.rodata_section = None
def encode(self):
return self.image.as_bytearray
def add_function(self, function):
import peachpy.x86_64.function
from peachpy.util import roundup
assert isinstance(function, peachpy.x86_64.function.ABIFunction), \
"Function must be finalized with an ABI before its assembly can be used"
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)
const_offset = 0
if encoded_function.const_section.content:
if self.rodata_section is None:
from peachpy.formats.elf.section import ReadOnlyDataSection
self.rodata_section = ReadOnlyDataSection()
self.image.add_section(self.rodata_section)
const_offset = self.rodata_section.get_content_size(self.abi)
const_padding = bytearray([encoded_function.const_section.alignment_byte] *
(roundup(const_offset, encoded_function.const_section.alignment) - const_offset))
self.rodata_section.content += const_padding
const_offset += len(const_padding)
self.rodata_section.content += encoded_function.const_section.content
self.rodata_section.alignment = max(self.rodata_section.alignment, encoded_function.const_section.alignment)
# Map from symbol name to symbol index
from peachpy.formats.elf.symbol import Symbol, SymbolBinding, SymbolType
symbol_map = dict()
for symbol in encoded_function.const_section.symbols:
const_symbol = Symbol()
const_symbol.name = function.mangled_name + "." + symbol.name
const_symbol.value = const_offset + symbol.offset
const_symbol.size = symbol.size
const_symbol.section = self.rodata_section
const_symbol.binding = SymbolBinding.local
const_symbol.type = SymbolType.data_object
self.image.symtab.add(const_symbol)
symbol_map[symbol] = const_symbol
if encoded_function.code_section.relocations:
if self.text_rela_section is None:
from peachpy.formats.elf.section import RelocationsWithAddendSection
self.text_rela_section = RelocationsWithAddendSection(self.text_section, self.image.symtab)
self.image.add_section(self.text_rela_section)
from peachpy.formats.elf.symbol import RelocationWithAddend, RelocationType
for relocation in encoded_function.code_section.relocations:
elf_relocation = RelocationWithAddend(RelocationType.x86_64_pc32,
code_offset + relocation.offset,
symbol_map[relocation.symbol],
relocation.offset - relocation.program_counter)
self.text_rela_section.add(elf_relocation)
function_symbol = Symbol()
function_symbol.name = function.mangled_name
function_symbol.value = code_offset
function_symbol.content_size = len(encoded_function.code_section)
function_symbol.section = self.text_section
function_symbol.binding = SymbolBinding.global_
function_symbol.type = SymbolType.function
self.image.symtab.add(function_symbol)
class MachOWriter(ImageWriter):
def __init__(self, output_path, abi):
super(MachOWriter, self).__init__(output_path)
from peachpy.formats.macho.image import Image
self.abi = abi
self.image = Image(abi)
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.formats.macho.symbol import Symbol, SymbolType, SymbolDescription, SymbolVisibility, \
Relocation, RelocationType
from peachpy.util import roundup
encoded_function = function.encode()
code_offset = len(self.image.text_section.content)
code_padding = bytearray([encoded_function.code_section.alignment_byte] *
(roundup(code_offset, encoded_function.code_section.alignment) - code_offset))
self.image.text_section.content += code_padding
code_offset += len(code_padding)
self.image.text_section.content += encoded_function.code_section.content
self.image.text_section.alignment = \
max(self.image.text_section.alignment, encoded_function.code_section.alignment)
const_offset = self.image.const_section.content_size
const_padding = bytearray([encoded_function.const_section.alignment_byte] *
(roundup(const_offset, encoded_function.const_section.alignment) - const_offset))
self.image.const_section.content += const_padding
const_offset += len(const_padding)
self.image.const_section.content += encoded_function.const_section.content
self.image.const_section.alignment = \
max(self.image.const_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:
macho_symbol = Symbol("_" + function.mangled_name + "." + symbol.name,
SymbolType.section_relative, self.image.const_section,
const_offset + symbol.offset)
macho_symbol.description = SymbolDescription.defined
self.image.symbol_table.add_symbol(macho_symbol)
symbol_map[symbol] = macho_symbol
for relocation in encoded_function.code_section.relocations:
macho_relocation = Relocation(RelocationType.x86_64_signed, code_offset + relocation.offset, 4,
symbol_map[relocation.symbol], is_pc_relative=True)
relocation_addend = relocation.offset + 4 - relocation.program_counter
if relocation_addend != 0:
self.image.text_section.content[code_offset + relocation.offset] = relocation_addend & 0xFF
self.image.text_section.content[code_offset + relocation.offset + 1] = (relocation_addend >> 8) & 0xFF
self.image.text_section.content[code_offset + relocation.offset + 2] = (relocation_addend >> 16) & 0xFF
self.image.text_section.content[code_offset + relocation.offset + 3] = (relocation_addend >> 24) & 0xFF
self.image.text_section.relocations.append(macho_relocation)
function_symbol = Symbol("_" + function.mangled_name, SymbolType.section_relative, self.image.text_section,
value=code_offset)
function_symbol.description = SymbolDescription.defined
function_symbol.visibility = SymbolVisibility.external
self.image.symbol_table.add_symbol(function_symbol)
class ELFWriter(ImageWriter):
def __init__(self, output_path, abi, input_path=None):
super(ELFWriter, self).__init__(output_path)
from peachpy.formats.elf.image import Image
from peachpy.formats.elf.section import TextSection, ProgramBitsSection
self.abi = abi
self.image = Image(abi, input_path)
self.text_section = TextSection()
self.image.add_section(self.text_section)
self.gnu_stack_section = ProgramBitsSection(".note.GNU-stack", allocate=False)
self.image.add_section(self.gnu_stack_section)
self.text_rela_section = None
self.rodata_section = None
def encode(self):
return self.image.as_bytearray
def add_function(self, function):
import peachpy.x86_64.function
from peachpy.util import roundup
assert isinstance(function, peachpy.x86_64.function.ABIFunction), \
"Function must be finalized with an ABI before its assembly can be used"
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)
const_offset = 0
if encoded_function.const_section.content:
if self.rodata_section is None:
from peachpy.formats.elf.section import ReadOnlyDataSection
self.rodata_section = ReadOnlyDataSection()
self.image.add_section(self.rodata_section)
const_offset = self.rodata_section.get_content_size(self.abi)
const_padding = bytearray([encoded_function.const_section.alignment_byte] *
(roundup(const_offset, encoded_function.const_section.alignment) - const_offset))
self.rodata_section.content += const_padding
const_offset += len(const_padding)
self.rodata_section.content += encoded_function.const_section.content
self.rodata_section.alignment = max(self.rodata_section.alignment, encoded_function.const_section.alignment)
# Map from symbol name to symbol index
from peachpy.formats.elf.symbol import Symbol, SymbolBinding, SymbolType
symbol_map = dict()
for symbol in encoded_function.const_section.symbols:
const_symbol = Symbol()
const_symbol.name = function.mangled_name + "." + symbol.name
const_symbol.value = const_offset + symbol.offset
const_symbol.size = symbol.size
const_symbol.section = self.rodata_section
const_symbol.binding = SymbolBinding.local
const_symbol.type = SymbolType.data_object
self.image.symtab.add(const_symbol)
symbol_map[symbol] = const_symbol
if encoded_function.code_section.relocations:
if self.text_rela_section is None:
from peachpy.formats.elf.section import RelocationsWithAddendSection
self.text_rela_section = RelocationsWithAddendSection(self.text_section, self.image.symtab)
self.image.add_section(self.text_rela_section)
from peachpy.formats.elf.symbol import RelocationWithAddend, RelocationType
for relocation in encoded_function.code_section.relocations:
elf_relocation = RelocationWithAddend(RelocationType.x86_64_pc32,
code_offset + relocation.offset,
symbol_map[relocation.symbol],
relocation.offset - relocation.program_counter)
self.text_rela_section.add(elf_relocation)
function_symbol = Symbol()
function_symbol.name = function.mangled_name
function_symbol.value = code_offset
function_symbol.content_size = len(encoded_function.code_section)
function_symbol.section = self.text_section
function_symbol.binding = SymbolBinding.global_
function_symbol.type = SymbolType.function
self.image.symtab.add(function_symbol)
class ELFWriter:
def __init__(self, output_path, abi, input_path=None):
from peachpy.formats.elf.image import Image
from peachpy.formats.elf.section import 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.text_rela_section = None
self.rodata_section = None
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
from peachpy.util import roundup
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()
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)
const_offset = 0
if encoded_function.const_section.content:
if self.rodata_section is None:
from peachpy.formats.elf.section import ReadOnlyDataSection
self.rodata_section = ReadOnlyDataSection()
self.image.add_section(self.rodata_section)
const_offset = self.rodata_section.get_content_size(self.abi)
const_padding = bytearray([encoded_function.const_section.alignment_byte] *
(roundup(const_offset, encoded_function.const_section.alignment) - const_offset))
self.rodata_section.content += const_padding
const_offset += len(const_padding)
self.rodata_section.content += encoded_function.const_section.content
self.rodata_section.alignment = max(self.rodata_section.alignment, encoded_function.const_section.alignment)
# Map from symbol name to symbol index
from peachpy.formats.elf.symbol import Symbol, SymbolBinding, SymbolType
symbol_map = dict()
for symbol in encoded_function.const_section.symbols:
const_symbol = Symbol()
const_symbol.name = symbol.name
const_symbol.value = const_offset + symbol.offset
const_symbol.size = symbol.size
const_symbol.section = self.rodata_section
const_symbol.binding = SymbolBinding.local
const_symbol.type = SymbolType.data_object
self.image.symtab.add(const_symbol)
symbol_map[symbol] = const_symbol
if encoded_function.code_section.relocations:
if self.text_rela_section is None:
from peachpy.formats.elf.section import RelocationsWithAddendSection
self.text_rela_section = RelocationsWithAddendSection(self.text_section, self.image.symtab)
self.image.add_section(self.text_rela_section)
from peachpy.formats.elf.symbol import RelocationWithAddend, RelocationType
for relocation in encoded_function.code_section.relocations:
elf_relocation = RelocationWithAddend(RelocationType.x86_64_pc32,
relocation.offset,
symbol_map[relocation.symbol],
-4)
self.text_rela_section.add(elf_relocation)
function_symbol = Symbol()
function_symbol.name = function.name
function_symbol.value = code_offset
function_symbol.content_size = len(encoded_function.code_section)
function_symbol.section = self.text_section
function_symbol.binding = SymbolBinding.global_
function_symbol.type = SymbolType.function
self.image.symtab.add(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 MachOWriter:
def __init__(self, output_path, abi):
from peachpy.formats.macho.image import Image
self.output_path = output_path
self.previous_writer = None
self.abi = abi
self.image = Image(abi)
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.formats.macho.symbol import Symbol, SymbolType, SymbolDescription, SymbolVisibility, \
Relocation, RelocationType
from peachpy.util import roundup
encoded_function = function.encode()
code_offset = len(self.image.text_section.content)
code_padding = bytearray([encoded_function.code_section.alignment_byte] *
(roundup(code_offset, encoded_function.code_section.alignment) - code_offset))
self.image.text_section.content += code_padding
code_offset += len(code_padding)
self.image.text_section.content += encoded_function.code_section.content
self.image.text_section.alignment = \
max(self.image.text_section.alignment, encoded_function.code_section.alignment)
const_offset = self.image.const_section.content_size
const_padding = bytearray([encoded_function.const_section.alignment_byte] *
(roundup(const_offset, encoded_function.const_section.alignment) - const_offset))
self.image.text_section.content += const_padding
const_offset += len(const_padding)
self.image.const_section.content += encoded_function.const_section.content
self.image.const_section.alignment = \
max(self.image.const_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:
macho_symbol = Symbol(symbol.name,
SymbolType.section_relative, self.image.const_section,
const_offset + symbol.offset)
macho_symbol.description = SymbolDescription.defined
self.image.symbol_table.add_symbol(macho_symbol)
symbol_map[symbol] = macho_symbol
for relocation in encoded_function.code_section.relocations:
macho_relocation = Relocation(RelocationType.x86_64_signed, code_offset + relocation.offset, 4,
symbol_map[relocation.symbol], is_pc_relative=True)
self.image.text_section.relocations.append(macho_relocation)
function_symbol = Symbol("_" + function.name, SymbolType.section_relative, self.image.text_section,
value=code_offset)
function_symbol.description = SymbolDescription.defined
function_symbol.visibility = SymbolVisibility.external
self.image.symbol_table.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)
class MachOWriter(ImageWriter):
def __init__(self, output_path, abi):
super(MachOWriter, self).__init__(output_path)
from peachpy.formats.macho.image import Image
self.abi = abi
self.image = Image(abi)
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.formats.macho.symbol import Symbol, SymbolType, SymbolDescription, SymbolVisibility, \
Relocation, RelocationType
from peachpy.util import roundup
encoded_function = function.encode()
code_offset = len(self.image.text_section.content)
code_padding = bytearray([encoded_function.code_section.alignment_byte] *
(roundup(code_offset, encoded_function.code_section.alignment) - code_offset))
self.image.text_section.content += code_padding
code_offset += len(code_padding)
self.image.text_section.content += encoded_function.code_section.content
self.image.text_section.alignment = \
max(self.image.text_section.alignment, encoded_function.code_section.alignment)
const_offset = self.image.const_section.content_size
const_padding = bytearray([encoded_function.const_section.alignment_byte] *
(roundup(const_offset, encoded_function.const_section.alignment) - const_offset))
self.image.const_section.content += const_padding
const_offset += len(const_padding)
self.image.const_section.content += encoded_function.const_section.content
self.image.const_section.alignment = \
max(self.image.const_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:
macho_symbol = Symbol("_" + function.mangled_name + "." + symbol.name,
SymbolType.section_relative, self.image.const_section,
const_offset + symbol.offset)
macho_symbol.description = SymbolDescription.defined
self.image.symbol_table.add_symbol(macho_symbol)
symbol_map[symbol] = macho_symbol
for relocation in encoded_function.code_section.relocations:
macho_relocation = Relocation(RelocationType.x86_64_signed, code_offset + relocation.offset, 4,
symbol_map[relocation.symbol], is_pc_relative=True)
relocation_addend = relocation.offset + 4 - relocation.program_counter
if relocation_addend != 0:
self.image.text_section.content[code_offset + relocation.offset] = relocation_addend & 0xFF
self.image.text_section.content[code_offset + relocation.offset + 1] = (relocation_addend >> 8) & 0xFF
self.image.text_section.content[code_offset + relocation.offset + 2] = (relocation_addend >> 16) & 0xFF
self.image.text_section.content[code_offset + relocation.offset + 3] = (relocation_addend >> 24) & 0xFF
self.image.text_section.relocations.append(macho_relocation)
function_symbol = Symbol("_" + function.mangled_name, SymbolType.section_relative, self.image.text_section,
value=code_offset)
function_symbol.description = SymbolDescription.defined
function_symbol.visibility = SymbolVisibility.external
self.image.symbol_table.add_symbol(function_symbol)
