more calldata fixes including natives

mythril/analysis/modules/ether_send.py

@@ -112,7 +112,7 @@ def execute(statespace):
                     model = solver.get_model(node.constraints)
 
                     pretty_model = solver.pretty_print_model(model)
-                    logging.debug(pretty_model)
+                    logging.debug('[ETHER_SEND]\n' + pretty_model)
 
                     debug = "SOLVER OUTPUT:\n" + pretty_model
 

mythril/laser/ethereum/instructions.py

@@ -13,7 +13,7 @@ from mythril.laser.ethereum.call import get_call_parameters
 from mythril.laser.ethereum.evm_exceptions import VmException, StackUnderflowException, InvalidJumpDestination, \
     InvalidInstruction
 from mythril.laser.ethereum.keccak import KeccakFunctionManager
-from mythril.laser.ethereum.state import GlobalState, CalldataType
+from mythril.laser.ethereum.state import GlobalState, CalldataType, Calldata
 from mythril.laser.ethereum.transaction import MessageCallTransaction, TransactionStartSignal, \
     ContractCreationTransaction
 
@@ -1030,8 +1030,17 @@ class Instruction:
 
                 return [global_state]
 
-            for i in range(min(len(data), mem_out_sz)):  # If more data is used then it's chopped off
-                global_state.mstate.memory[mem_out_start + i] = data[i]
+            if type(data) == Calldata: # identity() returns calldata
+                new_memory = []
+                for i in range(mem_out_sz):
+                    new_memory.append(data[i])
+
+                for i in range(0, len(new_memory), 32):
+                    global_state.mstate.memory[mem_out_start + i] = simplify(Concat(new_memory[i:i+32]))
+
+            else:
+                for i in range(min(len(data), mem_out_sz)):  # If more data is used then it's chopped off
+                    global_state.mstate.memory[mem_out_start + i] = data[i]
 
             # TODO: maybe use BitVec here constrained to 1
             return [global_state]

mythril/laser/ethereum/state.py

@@ -27,7 +27,7 @@ class Calldata:
         concrete_calldata.sort(key=lambda x: x[0].as_long() if type(x) == list else -1)
         result = []
         arr_index = 1
-        for i in range(0, concrete_calldata[len(concrete_calldata)-1][0].as_long()+1):
+        for i in range(concrete_calldata[len(concrete_calldata)-1][0].as_long()+1):
             if concrete_calldata[arr_index][0].as_long() == i:
                 result.append(concrete_calldata[arr_index][1].as_long())
                 arr_index += 1