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# Copyright (c) 2015-2019 Vector 35 Inc
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
import traceback
import ctypes
import binaryninja
from binaryninja import _binaryninjacore as core
from binaryninja.filemetadata import FileMetadata
from binaryninja.binaryview import BinaryView
from binaryninja.function import (DisassemblyTextLine, InstructionTextToken)
from binaryninja.enums import InstructionTextTokenType, TypeClass, HighlightStandardColor
from binaryninja.log import log_error
from binaryninja.types import Type
from binaryninja import highlight
class DataRenderer(object):
"""
DataRenderer objects tell the Linear View how to render specific types.
The `perform_is_valid_for_data` method returns a boolean to indicate if your derived class
is able to render the type, given the `addr` and `context`. The `context` is a list of Type
objects which represents the chain of nested objects that is being displayed.
The `perform_get_lines_for_data` method returns a list of `DisassemblyTextLine` objects each one
representing a single line of Linear View output. The `prefix` variable is a list of `InstructionTextToken`'s
which have already been generated by other `DataRenderer`'s.
After defining the `DataRenderer` subclass you must then register it with the core. This is done by calling
either `register_type_specific` or `register_generic`. A "generic" type renderer is able to be overridden by
a "type specific" renderer. For instance there is a generic struct render which renders any struct that hasn't
been explicitly overridden by a "type specific" renderer.
In the below example we create a data renderer that overrides the default display for `struct BAR`.
class BarDataRenderer(DataRenderer):
def __init__(self):
DataRenderer.__init__(self)
def perform_is_valid_for_data(self, ctxt, view, addr, type, context):
return DataRenderer.is_type_of_struct_name(type, "BAR", context)
def perform_get_lines_for_data(self, ctxt, view, addr, type, prefix, width, context):
prefix.append(InstructionTextToken(InstructionTextTokenType.TextToken, "I'm in ur BAR"))
return [DisassemblyTextLine(prefix, addr)]
def __del__(self):
pass
BarDataRenderer().register_type_specific()
"""
def __init__(self, context=None):
self._cb = core.BNCustomDataRenderer()
self._cb.context = context
self._cb.freeObject = self._cb.freeObject.__class__(self._free_object)
self._cb.isValidForData = self._cb.isValidForData.__class__(self._is_valid_for_data)
self._cb.getLinesForData = self._cb.getLinesForData.__class__(self._get_lines_for_data)
self.handle = core.BNCreateDataRenderer(self._cb)
@classmethod
def is_type_of_struct_name(cls, type, name, context):
return (type.type_class == TypeClass.StructureTypeClass and len(context) > 0
and context[0].type_class == TypeClass.NamedTypeReferenceClass and
context[0].named_type_reference.name == name)
def register_type_specific(self):
core.BNRegisterTypeSpecificDataRenderer(core.BNGetDataRendererContainer(), self.handle)
def register_generic(self):
core.BNRegisterGenericDataRenderer(core.BNGetDataRendererContainer(), self.handle)
def _free_object(self, ctxt):
try:
self.perform_free_object(ctxt)
except:
log_error(traceback.format_exc())
def _is_valid_for_data(self, ctxt, view, addr, type, context, ctxCount):
try:
file_metadata = FileMetadata(handle=core.BNGetFileForView(view))
view = BinaryView(file_metadata=file_metadata, handle=core.BNNewViewReference(view))
type = Type(handle=core.BNNewTypeReference(type))
pycontext = []
for i in range(0, ctxCount):
pycontext.append(Type(core.BNNewTypeReference(context[i])))
return self.perform_is_valid_for_data(ctxt, view, addr, type, pycontext)
except:
log_error(traceback.format_exc())
return False
def _get_lines_for_data(self, ctxt, view, addr, type, prefix, prefixCount, width, count, typeCtx, ctxCount):
try:
file_metadata = FileMetadata(handle=core.BNGetFileForView(view))
view = BinaryView(file_metadata=file_metadata, handle=core.BNNewViewReference(view))
type = Type(handle=core.BNNewTypeReference(type))
prefixTokens = InstructionTextToken.get_instruction_lines(prefix, prefixCount)
pycontext = []
for i in range(ctxCount):
pycontext.append(Type(core.BNNewTypeReference(typeCtx[i])))
result = self.perform_get_lines_for_data(ctxt, view, addr, type, prefixTokens, width, pycontext)
count[0] = len(result)
line_buf = (core.BNDisassemblyTextLine * len(result))()
for i in range(len(result)):
line = result[i]
color = line.highlight
if not isinstance(color, HighlightStandardColor) and not isinstance(color, highlight.HighlightColor):
raise ValueError("Specified color is not one of HighlightStandardColor, highlight.HighlightColor")
if isinstance(color, HighlightStandardColor):
color = highlight.HighlightColor(color)
line_buf[i].highlight = color._get_core_struct()
if line.address is None:
if len(line.tokens) > 0:
line_buf[i].addr = line.tokens[0].address
else:
line_buf[i].addr = 0
else:
line_buf[i].addr = line.address
if line.il_instruction is not None:
line_buf[i].instrIndex = line.il_instruction.instr_index
else:
line_buf[i].instrIndex = 0xffffffffffffffff
line_buf[i].count = len(line.tokens)
line_buf[i].tokens = InstructionTextToken.get_instruction_lines(line.tokens)
return ctypes.cast(line_buf, ctypes.c_void_p).value
except:
log_error(traceback.format_exc())
return None
def perform_free_object(self, ctxt):
pass
def perform_is_valid_for_data(self, ctxt, view, addr, type, context):
return False
def perform_get_lines_for_data(self, ctxt, view, addr, type, prefix, width, context):
return []
def __del__(self):
pass
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