def ast(self,
astree: AbstractSyntaxTree,
iaddr: str,
bytestring: str,
xdata: InstrXData) -> List[ASTInstruction]:
if xdata.has_call_target():
calltarget = xdata.call_target(self.ixd)
tgtname = calltarget.name
tgtxpr = self.target_expr_ast(astree, xdata)
(lhs, assigns) = self.lhs_ast(astree, iaddr, xdata)
args = self.arguments(xdata)
argxprs: List[ASTExpr] = []
for arg in args:
if XU.is_struct_field_address(arg, astree):
addr = XU.xxpr_to_struct_field_address_expr(arg, astree)
elif arg.is_string_reference:
xpr = XU.xxpr_to_ast_expr(arg, astree)
cstr = arg.constant.string_reference()
saddr = hex(arg.constant.value)
argxprs.append(astree.mk_string_constant(xpr, cstr, saddr))
elif arg.is_argument_value:
argindex = arg.argument_index()
funarg = astree.function_argument(argindex)
if funarg:
astxpr = astree.mk_register_variable_expr(
funarg.name, vtype=funarg.typ, parameter=argindex)
argxprs.append(astxpr)
else:
astxpr = XU.xxpr_to_ast_expr(arg, astree)
argxprs.append(astxpr)
else:
astxpr = XU.xxpr_to_ast_expr(arg, astree)
argxprs.append(astxpr)
if lhs.is_ignored:
call: ASTInstruction = astree.mk_call(lhs, tgtxpr, argxprs)
astree.add_instruction_span(call.id, iaddr, bytestring)
return [call]
else:
call = cast(ASTInstruction, astree.mk_call(lhs, tgtxpr, argxprs))
astree.add_instruction_span(call.id, iaddr, bytestring)
for assign in assigns:
astree.add_instruction_span(assign.id, iaddr, bytestring)
return [call] + assigns
else:
return []
def ast_lvalue(
self, astree: AbstractSyntaxTree
) -> Tuple[AST.ASTLval, List[AST.ASTInstruction],
List[AST.ASTInstruction]]:
offset = self.memory_offset.ast_rvalue(astree)
if not self.is_add:
offset = astree.mk_unary_op("minus", offset)
xreg = astree.mk_register_variable_expr(self.register)
xindex = astree.mk_binary_op("plus", xreg, offset)
if self.is_write_back:
reglv = astree.mk_variable_lval(self.register)
assign = astree.mk_assign(reglv, xindex)
if self.is_index:
memexp = astree.mk_memref_lval(xindex)
return (memexp, [], [assign])
else:
memexp = astree.mk_memref_lval(xreg)
return (memexp, [], [assign])
else:
memexp = astree.mk_memref_lval(xindex)
return (memexp, [], [])
def ast_rvalue(self, astree: AbstractSyntaxTree) -> AST.ASTExpr:
return astree.mk_register_variable_expr(self.register)
def ast_rvalue(
self, astree: AbstractSyntaxTree
) -> Tuple[AST.ASTExpr, List[AST.ASTInstruction],
List[AST.ASTInstruction]]:
return (astree.mk_register_variable_expr(self.register), [], [])