def instr_index(self):
"""Index of the statement that this expression belongs to (read-only)"""
return core.BNGetHighLevelILInstructionForExpr(self._function.handle,
self._expr_index)
def __init__(self, func, expr_index, as_ast=True, instr_index=None):
instr = core.BNGetHighLevelILByIndex(func.handle, expr_index, as_ast)
self._function = func
self._expr_index = expr_index
if instr_index is None:
self._instr_index = core.BNGetHighLevelILInstructionForExpr(
func.handle, expr_index)
else:
self._instr_index = instr_index
self._operation = HighLevelILOperation(instr.operation)
self._size = instr.size
self._address = instr.address
self._source_operand = instr.sourceOperand
self._parent = instr.parent
self._as_ast = as_ast
operands = HighLevelILInstruction.ILOperations[instr.operation]
self._operands = []
i = 0
for operand in operands:
name, operand_type = operand
if operand_type == "int":
value = instr.operands[i]
value = (value & ((1 << 63) - 1)) - (value & (1 << 63))
elif operand_type == "float":
if instr.size == 4:
value = struct.unpack(
"f", struct.pack("I",
instr.operands[i] & 0xffffffff))[0]
elif instr.size == 8:
value = struct.unpack("d",
struct.pack("Q",
instr.operands[i]))[0]
else:
value = instr.operands[i]
elif operand_type == "expr":
value = HighLevelILInstruction(func, instr.operands[i],
self._as_ast)
elif operand_type == "intrinsic":
value = lowlevelil.ILIntrinsic(func.arch, instr.operands[i])
elif operand_type == "var":
value = function.Variable.from_identifier(
self._function.source_function, instr.operands[i])
elif operand_type == "var_ssa":
var = function.Variable.from_identifier(
self._function.source_function, instr.operands[i])
version = instr.operands[i + 1]
i += 1
value = mediumlevelil.SSAVariable(var, version)
elif operand_type == "int_list":
count = ctypes.c_ulonglong()
operand_list = core.BNHighLevelILGetOperandList(
func.handle, self._expr_index, i, count)
value = []
for j in range(count.value):
value.append(operand_list[j])
core.BNHighLevelILFreeOperandList(operand_list)
elif operand_type == "expr_list":
count = ctypes.c_ulonglong()
operand_list = core.BNHighLevelILGetOperandList(
func.handle, self._expr_index, i, count)
i += 1
value = []
for j in range(count.value):
value.append(
HighLevelILInstruction(func, operand_list[j],
self._as_ast))
core.BNHighLevelILFreeOperandList(operand_list)
elif operand_type == "var_ssa_list":
count = ctypes.c_ulonglong()
operand_list = core.BNHighLevelILGetOperandList(
func.handle, self._expr_index, i, count)
i += 1
value = []
for j in range(count.value // 2):
var_id = operand_list[j * 2]
var_version = operand_list[(j * 2) + 1]
value.append(
mediumlevelil.SSAVariable(
function.Variable.from_identifier(
self._function.source_function, var_id),
var_version))
core.BNHighLevelILFreeOperandList(operand_list)
elif operand_type == "member_index":
value = instr.operands[i]
if (value & (1 << 63)) != 0:
value = None
elif operand_type == "label":
value = GotoLabel(self.function, instr.operands[i])
self._operands.append(value)
self.__dict__[name] = value
i += 1