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import ctypes
import dataclasses
from typing import Optional
import binaryninja
from binaryninja import BinaryView
from binaryninja._binaryninjacore import BNFreeStringList, BNAllocString, BNFreeString
from . import _kernelcachecore as kccore
from .kernelcache_enums import *
@dataclasses.dataclass
class CacheImage:
name: str
header_virtual_address: int
header_file_address: int
def __str__(self):
return repr(self)
def __repr__(self):
return f"<CacheImage '{self.name}': 0x{self.header_virtual_address:x} (@0x{self.header_file_address:x})>"
@dataclasses.dataclass
class CacheSymbol:
symbol_type: kccore.SymbolTypeEnum
address: int
name: str
def __str__(self):
return repr(self)
def __repr__(self):
return f"<CacheSymbol '{self.name}': 0x{self.address:x}>"
def image_from_api(image: kccore.BNKernelCacheImage) -> CacheImage:
return CacheImage(
name=image.name,
header_file_address=image.headerFileAddress,
header_virtual_address=image.headerVirtualAddress
)
def image_to_api(image: CacheImage) -> kccore.BNKernelCacheImage:
return kccore.BNKernelCacheImage(
_name=BNAllocString(image.name),
headerFileAddress=image.header_file_address,
headerVirtualAddress=image.header_virtual_address,
)
def symbol_from_api(symbol: kccore.BNKernelCacheSymbol) -> CacheSymbol:
return CacheSymbol(
symbol_type=symbol.symbolType,
address=symbol.address,
name=symbol.name
)
def symbol_to_api(symbol: CacheSymbol) -> kccore.BNKernelCacheSymbol:
return kccore.BNKernelCacheSymbol(
symbolType=symbol.symbol_type,
address=symbol.address,
_name=BNAllocString(symbol.name)
)
class KernelCacheController:
def __init__(self, view: BinaryView):
"""
Retrieve the shared cache controller for a given view.
Call `is_valid` to check if the controller is valid.
"""
self.handle = kccore.BNGetKernelCacheController(view.handle)
def __del__(self):
if self.handle is not None:
kccore.BNFreeKernelCacheControllerReference(self.handle)
def __str__(self):
return repr(self)
def __repr__(self):
return f"<KernelCacheController: {len(self.images)} images>"
def is_valid(self) -> bool:
return self.handle is not None
def apply_image(self, view: BinaryView, image: CacheImage) -> bool:
api_image: kccore.BNKernelCacheImage = image_to_api(image)
result = kccore.BNKernelCacheControllerApplyImage(self.handle, view.handle, api_image)
kccore.BNKernelCacheFreeImage(api_image)
return result
def is_image_loaded(self, image: CacheImage) -> bool:
api_image: kccore.BNKernelCacheImage = image_to_api(image)
result = kccore.BNKernelCacheControllerIsImageLoaded(self.handle, api_image)
kccore.BNKernelCacheFreeImage(api_image)
return result
def get_image_at(self, address: int) -> Optional[CacheImage]:
api_image = kccore.BNKernelCacheImage()
if not kccore.BNKernelCacheControllerGetImageAt(self.handle, address, api_image):
return None
image = image_from_api(api_image)
kccore.BNKernelCacheFreeImage(api_image)
return image
def get_image_containing(self, address: int) -> Optional[CacheImage]:
api_image = kccore.BNKernelCacheImage()
if not kccore.BNKernelCacheControllerGetImageContaining(self.handle, address, api_image):
return None
image = image_from_api(api_image)
kccore.BNKernelCacheFreeImage(api_image)
return image
def get_image_with_name(self, name: str) -> Optional[CacheImage]:
api_image = kccore.BNKernelCacheImage()
if not kccore.BNKernelCacheControllerGetImageWithName(self.handle, name, api_image):
return None
image = image_from_api(api_image)
kccore.BNKernelCacheFreeImage(api_image)
return image
def get_image_dependencies(self, image: CacheImage) -> [str]:
"""
Returns a list of image names that this image depends on.
"""
count = ctypes.c_ulonglong()
api_image: kccore.BNKernelCacheImage = image_to_api(image)
value = kccore.BNKernelCacheControllerGetImageDependencies(self.handle, api_image, count)
kccore.BNKernelCacheFreeImage(api_image)
if value is None:
return []
result = []
for i in range(count.value):
result.append(value[i].decode("utf-8"))
BNFreeStringList(value, count)
return result
def get_symbol_at(self, address: int) -> Optional[CacheSymbol]:
api_symbol = kccore.BNKernelCacheSymbol()
if not kccore.BNKernelCacheControllerGetSymbolAt(self.handle, address, api_symbol):
return None
symbol = symbol_from_api(api_symbol)
kccore.BNKernelCacheFreeSymbol(api_symbol)
return symbol
def get_symbol_with_name(self, name: str) -> Optional[CacheSymbol]:
api_symbol = kccore.BNKernelCacheSymbol()
if not kccore.BNKernelCacheControllerGetSymbolWithName(self.handle, name, api_symbol):
return None
symbol = symbol_from_api(api_symbol)
kccore.BNKernelCacheFreeSymbol(api_symbol)
return symbol
@property
def images(self) -> [CacheImage]:
count = ctypes.c_ulonglong()
value = kccore.BNKernelCacheControllerGetImages(self.handle, count)
if value is None:
return []
result = []
for i in range(count.value):
result.append(image_from_api(value[i]))
kccore.BNKernelCacheFreeImageList(value, count)
return result
@property
def loaded_images(self) -> [CacheImage]:
"""
Get a list of images that are currently loaded in the view.
"""
count = ctypes.c_ulonglong()
value = kccore.BNKernelCacheControllerGetLoadedImages(self.handle, count)
if value is None:
return []
result = []
for i in range(count.value):
result.append(image_from_api(value[i]))
kccore.BNKernelCacheFreeImageList(value, count)
return result
@property
def symbols(self) -> [CacheSymbol]:
count = ctypes.c_ulonglong()
value = kccore.BNKernelCacheControllerGetSymbols(self.handle, count)
if value is None:
return []
result = []
for i in range(count.value):
result.append(symbol_from_api(value[i]))
kccore.BNKernelCacheFreeSymbolList(value, count)
return result
def _get_kernel_cache(instance: binaryninja.PythonScriptingInstance):
if instance.interpreter.active_view is None:
return None
controller = KernelCacheController(instance.interpreter.active_view)
if not controller.is_valid():
return None
return controller
binaryninja.PythonScriptingProvider.register_magic_variable(
"kc",
_get_kernel_cache
)
binaryninja.PythonScriptingProvider.register_magic_variable(
"kernel_cache",
_get_kernel_cache
)
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