public void CallPrecompiledAddress(SolidityMessageCall msg, SolidityPrecompiledContract contract)
{
var data = ChunkMemory(msg.InDataOffs.GetInt(), msg.InDataSize.GetInt());
var contractOut = contract.Execute(data);
SaveMemory(msg.OutDataOffs.GetInt(), contractOut.Value);
StackPushOne();
}
public void Step(SolidityProgram program, bool trace = false)
{
if (program == null) // http://solidity.readthedocs.io/en/develop/assembly.html
{
throw new ArgumentNullException(nameof(program));
}
var solidityOpCode = SolidityOpCode.Instance();
var currentOpCode = program.GetCurrentOpCode();
var opCode = solidityOpCode.GetCode(currentOpCode);
var stack = program.GetStack();
var oldMemSize = program.GetMemorySize();
long gasCost = (long)solidityOpCode.GetTier(opCode.Value);
switch (opCode)
{
case SolidityOpCodes.STOP:
gasCost = SolidityGasCost.STOP;
break;
case SolidityOpCodes.SUICIDE:
gasCost = SolidityGasCost.SUICIDE;
break;
case SolidityOpCodes.SSTORE:
var sstoreNewValue = stack.ElementAt(stack.Count() - 2);
var sstoreOldValue = program.StorageLoad(stack.Last());
if (sstoreOldValue == null || !sstoreOldValue.IsZero())
{
gasCost = SolidityGasCost.SET_SSTORE;
}
else if (sstoreOldValue != null && sstoreNewValue.IsZero())
{
gasCost = SolidityGasCost.CLEAR_SSTORE;
}
else
{
gasCost = SolidityGasCost.RESET_SSTORE;
}
break;
case SolidityOpCodes.SLOAD:
gasCost = SolidityGasCost.SLOAD;
break;
case SolidityOpCodes.MSTORE:
gasCost += CalcMemGas(oldMemSize, MemNeeded(stack.Last(), new DataWord(32)), 0);
break;
case SolidityOpCodes.MSTORE8:
gasCost += CalcMemGas(oldMemSize, MemNeeded(stack.Last(), new DataWord(1)), 0);
break;
case SolidityOpCodes.MLOAD:
gasCost += CalcMemGas(oldMemSize, MemNeeded(stack.Last(), new DataWord(32)), 0);
break;
case SolidityOpCodes.RETURN:
case SolidityOpCodes.REVERT:
gasCost = SolidityGasCost.STOP + CalcMemGas(oldMemSize, MemNeeded(stack.Last(), stack.ElementAt(stack.Count() - 2)), 0);
break;
case SolidityOpCodes.SHA3:
gasCost = SolidityGasCost.SHA3 + CalcMemGas(oldMemSize, MemNeeded(stack.Last(), stack.ElementAt(stack.Count() - 2)), 0);
var size = stack.ElementAt(stack.Count() - 2);
var chunkUsed = (size.GetLongValueSafe() + 31) / 32;
gasCost += chunkUsed * SolidityGasCost.SHA3_WORD;
break;
case SolidityOpCodes.CALLDATACOPY:
case SolidityOpCodes.RETURNDATACOPY:
gasCost += CalcMemGas(oldMemSize, MemNeeded(stack.Last(), stack.ElementAt(stack.Count() - 3)),
stack.ElementAt(stack.Count() - 3).GetLongValueSafe());
break;
case SolidityOpCodes.CODECOPY:
gasCost += CalcMemGas(oldMemSize,
MemNeeded(stack.Last(), stack.ElementAt(stack.Count() - 3)),
stack.ElementAt(stack.Count() - 3).GetLongValueSafe());
break;
case SolidityOpCodes.EXTCODESIZE:
gasCost = SolidityGasCost.EXT_CODE_SIZE;
break;
case SolidityOpCodes.EXTCODECOPY:
gasCost = SolidityGasCost.EXT_CODE_COPY + CalcMemGas(oldMemSize,
MemNeeded(stack.ElementAt(stack.Count() - 2), stack.ElementAt(stack.Count() - 4)),
stack.ElementAt(stack.Count() - 4).GetLongValueSafe());
break;
case SolidityOpCodes.CALL:
// case SolidityOpCodes.CALLCODE:
case SolidityOpCodes.DELEGATECALL:
case SolidityOpCodes.STATICCALL:
gasCost = SolidityGasCost.CALL;
var callGasWord = stack.ElementAt(stack.Count() - 1);
var callAddressWord = stack.ElementAt(stack.Count() - 2);
var value = DataWord.ZERO;
/*
* DataWord value = op.callHasValue() ?
* stack.get(stack.size() - 3) : DataWord.ZERO;
*/
if (opCode == SolidityOpCodes.CALL)
{
gasCost += SolidityGasCost.NEW_ACCT_CALL;
}
if (!value.IsZero())
{
gasCost += SolidityGasCost.VT_CALL;
}
break;
case SolidityOpCodes.EXP:
DataWord exp = stack.ElementAt(stack.Count() - 2);
int bytesOccupied = exp.GetBytesOccupied();
gasCost = SolidityGasCost.EXP_GAS + SolidityGasCost.EXP_BYTE_GAS * bytesOccupied;
break;
}
if (trace)
{
Trace.WriteLine("Operation " + Enum.GetName(typeof(SolidityOpCodes), opCode) + " " + program.GetPc() + " COST = " + gasCost);
Trace.WriteLine("Stack: ");
foreach (var s in program.GetStack())
{
Trace.WriteLine(s.GetData().ToHexString());
}
Trace.WriteLine("Memory: ");
Trace.WriteLine(program.GetMemory().ToHexString());
}
switch (opCode)
{
case SolidityOpCodes.PUSH1:
case SolidityOpCodes.PUSH2:
case SolidityOpCodes.PUSH3:
case SolidityOpCodes.PUSH4:
case SolidityOpCodes.PUSH5:
case SolidityOpCodes.PUSH6:
case SolidityOpCodes.PUSH7:
case SolidityOpCodes.PUSH8:
case SolidityOpCodes.PUSH9:
case SolidityOpCodes.PUSH10:
case SolidityOpCodes.PUSH11:
case SolidityOpCodes.PUSH12:
case SolidityOpCodes.PUSH13:
case SolidityOpCodes.PUSH14:
case SolidityOpCodes.PUSH15:
case SolidityOpCodes.PUSH16:
case SolidityOpCodes.PUSH17:
case SolidityOpCodes.PUSH18:
case SolidityOpCodes.PUSH19:
case SolidityOpCodes.PUSH20:
case SolidityOpCodes.PUSH21:
case SolidityOpCodes.PUSH22:
case SolidityOpCodes.PUSH23:
case SolidityOpCodes.PUSH24:
case SolidityOpCodes.PUSH25:
case SolidityOpCodes.PUSH26:
case SolidityOpCodes.PUSH27:
case SolidityOpCodes.PUSH28:
case SolidityOpCodes.PUSH29:
case SolidityOpCodes.PUSH30:
case SolidityOpCodes.PUSH31:
case SolidityOpCodes.PUSH32:
if (opCode == SolidityOpCodes.PUSH32)
{
string sss = "";
}
program.Step();
var nPush = SizeSolidityCodes[opCode.Value];
var data = program.Sweep(nPush);
program.StackPush(data);
break;
case SolidityOpCodes.CALLDATALOAD:
var pop = program.StackPop();
var dataValue = program.GetDataValue(pop);
program.StackPush(dataValue);
program.Step();
break;
case SolidityOpCodes.CALLDATACOPY:
var memOffsetData = program.StackPop();
var dataOffsetData = program.StackPop();
var lengthData = program.StackPop();
var msgData = program.GetDataCopy(dataOffsetData, lengthData);
program.SaveMemory(memOffsetData.GetIntValueSafe(), msgData.ToArray());
program.Step();
break;
case SolidityOpCodes.ADDRESS:
var address = program.GetOwnerAddress();
program.StackPush(address);
program.Step();
break;
case SolidityOpCodes.AND:
var word1 = program.StackPop();
var word2 = program.StackPop();
word1.And(word2);
program.StackPush(word1);
program.Step();
break;
case SolidityOpCodes.OR:
var w1 = program.StackPop();
var w2 = program.StackPop();
w1.Or(w2);
program.StackPush(w1);
program.Step();
break;
case SolidityOpCodes.XOR:
var xorW1 = program.StackPop();
var xorW2 = program.StackPop();
xorW1.XOR(xorW2);
program.StackPush(xorW1);
program.Step();
break;
case SolidityOpCodes.BYTE:
var bw1 = program.StackPop();
var bw2 = program.StackPop();
DataWord result = new DataWord();
var vBw1 = bw1.GetValue();
if (!bw1.GetValue().Equals(BG_32))
{
byte tmp = bw2.GetData()[bw1.GetInt()];
bw2.And(DataWord.ZERO);
bw2.GetData()[31] = tmp;
result = bw2;
}
program.StackPush(result);
program.Step();
break;
case SolidityOpCodes.ISZERO:
var isZeroW1 = program.StackPop();
// var isZeroW1 = stack.Last();
if (isZeroW1.IsZero())
{
isZeroW1.GetData()[31] = 1;
}
else
{
isZeroW1.And(DataWord.ZERO);
}
program.StackPush(isZeroW1);
program.Step();
break;
case SolidityOpCodes.EQ:
var eqW1 = program.StackPop();
var eqW2 = program.StackPop();
if (eqW1.XOR(eqW2).IsZero())
{
eqW1.And(DataWord.ZERO);
eqW1.GetData()[31] = 1;
}
else
{
eqW1.And(DataWord.ZERO);
}
program.StackPush(eqW1);
program.Step();
break;
case SolidityOpCodes.GT:
var gtW1 = program.StackPop();
var gtW2 = program.StackPop();
if (gtW1.GetValue().CompareTo(gtW2.GetValue()) == 1)
{
gtW1.And(DataWord.ZERO);
gtW1.GetData()[31] = 1;
}
else
{
gtW1.And(DataWord.ZERO);
}
program.StackPush(gtW1);
program.Step();
break;
case SolidityOpCodes.SGT:
var sgtW1 = program.StackPop();
var sgtW2 = program.StackPop();
if (sgtW1.GetSValue().CompareTo(sgtW2.GetSValue()) == 1)
{
sgtW1.And(DataWord.ZERO);
sgtW1.GetData()[31] = 1;
}
else
{
sgtW1.And(DataWord.ZERO);
}
program.StackPush(sgtW1);
program.Step();
break;
case SolidityOpCodes.LT:
var ltW1 = program.StackPop();
var ltW2 = program.StackPop();
if (ltW1.GetValue().CompareTo(ltW2.GetValue()) == -1)
{
ltW1.And(DataWord.ZERO);
ltW1.GetData()[31] = 1;
}
else
{
ltW1.And(DataWord.ZERO);
}
program.StackPush(ltW1);
program.Step();
break;
case SolidityOpCodes.SLT:
var sltW1 = program.StackPop();
var sltW2 = program.StackPop();
if (sltW1.GetSValue().CompareTo(sltW2.GetSValue()) == -1)
{
sltW1.And(DataWord.ZERO);
sltW1.GetData()[31] = 1;
}
else
{
sltW1.And(DataWord.ZERO);
}
program.StackPush(sltW1);
program.Step();
break;
case SolidityOpCodes.MSTORE:
var msStoreW1 = program.StackPop();
var msStoreW2 = program.StackPop();
program.SaveMemory(msStoreW1, msStoreW2);
program.Step();
break;
case SolidityOpCodes.MSTORE8:
var addr = program.StackPop();
var value = program.StackPop();
byte[] byteVal = { value.GetData()[31] };
program.SaveMemory(addr.GetIntValueSafe(), byteVal);
program.Step();
break;
case SolidityOpCodes.CALLVALUE:
var callValue = program.GetCallValue();
program.StackPush(callValue);
program.Step();
break;
case SolidityOpCodes.JUMPI:
var pos = program.StackPop();
var cond = program.StackPop();
if (!cond.IsZero() && !pos.IsZero())
{
int nextPC = program.VerifyJumpDest(pos);
program.SetPc(nextPC);
}
else
{
program.Step();
}
break;
case SolidityOpCodes.JUMP:
var jumpW1 = program.StackPop();
var nextPc = program.VerifyJumpDest(jumpW1);
program.SetPc(nextPc);
break;
case SolidityOpCodes.JUMPDEST:
program.Step();
break;
case SolidityOpCodes.DUP1:
case SolidityOpCodes.DUP2:
case SolidityOpCodes.DUP3:
case SolidityOpCodes.DUP4:
case SolidityOpCodes.DUP5:
case SolidityOpCodes.DUP6:
case SolidityOpCodes.DUP7:
case SolidityOpCodes.DUP8:
case SolidityOpCodes.DUP9:
case SolidityOpCodes.DUP10:
case SolidityOpCodes.DUP11:
case SolidityOpCodes.DUP12:
case SolidityOpCodes.DUP13:
case SolidityOpCodes.DUP14:
case SolidityOpCodes.DUP15:
case SolidityOpCodes.DUP16:
var n = SizeSolidityCodes[opCode.Value] - SizeSolidityCodes[SolidityOpCodes.DUP1] + 1;
var dup1W1 = stack[stack.Count() - n];
program.StackPush(dup1W1);
program.Step();
break;
case SolidityOpCodes.CODECOPY:
byte[] fullCode = ByteUtil.EMPTY_BYTE_ARRAY;
fullCode = program.GetCode().ToArray();
int copyDataW1 = program.StackPop().GetIntValueSafe();
int copyDataW2 = program.StackPop().GetIntValueSafe();
int copyDataW3 = program.StackPop().GetIntValueSafe();
int sizeToBeCopied =
(long)copyDataW2 + copyDataW3 > fullCode.Length ?
(fullCode.Length < copyDataW2 ? 0 : fullCode.Length - copyDataW2)
: copyDataW3;
byte[] codeCopy = new byte[copyDataW3];
if (copyDataW2 < fullCode.Length)
{
Array.Copy(fullCode, copyDataW2, codeCopy, 0, sizeToBeCopied);
}
program.SaveMemory(copyDataW1, codeCopy);
program.Step();
break;
case SolidityOpCodes.RETURN:
case SolidityOpCodes.REVERT:
int retW1 = program.StackPop().GetIntValueSafe();
int retW2 = program.StackPop().GetIntValueSafe();
byte[] hReturn = program.ChunkMemory(retW1, retW2);
program.SetHReturn(hReturn);
program.Step();
program.Stop();
if (opCode == SolidityOpCodes.REVERT)
{
program.GetResult().SetRevert();
}
break;
case SolidityOpCodes.SWAP1:
case SolidityOpCodes.SWAP2:
case SolidityOpCodes.SWAP3:
case SolidityOpCodes.SWAP4:
case SolidityOpCodes.SWAP5:
case SolidityOpCodes.SWAP6:
case SolidityOpCodes.SWAP7:
case SolidityOpCodes.SWAP8:
case SolidityOpCodes.SWAP9:
case SolidityOpCodes.SWAP10:
case SolidityOpCodes.SWAP11:
case SolidityOpCodes.SWAP12:
case SolidityOpCodes.SWAP13:
case SolidityOpCodes.SWAP14:
case SolidityOpCodes.SWAP15:
case SolidityOpCodes.SWAP16:
var sn = SizeSolidityCodes[opCode.Value] - SizeSolidityCodes[SolidityOpCodes.SWAP1] + 2;
stack.Swap(stack.Count() - 1, stack.Count() - sn);
program.Step();
break;
case SolidityOpCodes.DIV:
var dW1 = program.StackPop();
var dW2 = program.StackPop();
dW1.Div(dW2);
program.StackPush(dW1);
program.Step();
break;
case SolidityOpCodes.POP:
program.StackPop();
program.Step();
break;
case SolidityOpCodes.MLOAD:
var mloadW1 = program.StackPop();
var memoryW2 = program.LoadMemory(mloadW1);
program.StackPush(memoryW2);
program.Step();
break;
case SolidityOpCodes.ADD:
var addW1 = program.StackPop();
var addW2 = program.StackPop();
addW1.Add(addW2);
program.StackPush(addW1);
program.Step();
break;
case SolidityOpCodes.SUB:
var subW1 = program.StackPop();
var subW2 = program.StackPop();
subW1.Sub(subW2);
program.StackPush(subW1);
program.Step();
break;
case SolidityOpCodes.MUL:
var mulW1 = program.StackPop();
var mulW2 = program.StackPop();
mulW1.Mul(mulW2);
program.StackPush(mulW1);
program.Step();
break;
case SolidityOpCodes.CALL: // CONTINUE TO DEVELOP METHOD CALL.
program.StackPop();
var codeAddress = program.StackPop();
var cv = program.StackPop();
DataWord inDataOffs = program.StackPop();
DataWord inDataSize = program.StackPop();
DataWord outDataOffs = program.StackPop();
DataWord outDataSize = program.StackPop();
program.MemoryExpand(outDataOffs, outDataSize);
var msg = new SolidityMessageCall(opCode.Value, null, codeAddress, cv, inDataOffs, inDataSize, outDataOffs, outDataSize);
var contract = SolidityPrecompiledContract.GetContractForAddress(codeAddress);
if (contract != null)
{
program.CallPrecompiledAddress(msg, contract);
}
program.Step();
break;
case SolidityOpCodes.NOT:
var notW1 = program.StackPop();
notW1.BNot();
program.StackPush(notW1);
program.Step();
break;
case SolidityOpCodes.EXP:
var expWord1 = program.StackPop();
var expWord2 = program.StackPop();
expWord1.Exp(expWord2);
program.StackPush(expWord1);
program.Step();
break;
case SolidityOpCodes.CALLDATASIZE:
var dataSize = program.GetDataSize();
program.StackPush(dataSize);
program.Step();
break;
case SolidityOpCodes.SSTORE:
var sstoreWord1 = program.StackPop();
var sstoreWord2 = program.StackPop();
var tt = sstoreWord1.GetData().ToHexString();
var tt2 = sstoreWord2.GetData().ToHexString();
program.SaveStorage(sstoreWord1, sstoreWord2);
program.Step();
break;
case SolidityOpCodes.STOP:
program.SetHReturn(SolidityMemory.EMPTY_BYTE_ARRAY);
program.Stop();
break;
case SolidityOpCodes.SLOAD:
var sLoadKey = program.StackPop();
var sLoadVal = program.StorageLoad(sLoadKey);
program.StackPush(sLoadVal); program.Step();
break;
case SolidityOpCodes.SHA3:
var sha3MemOffsetData = program.StackPop();
var sha3LengthData = program.StackPop();
byte[] buffer = program.ChunkMemory(sha3MemOffsetData.GetIntValueSafe(), sha3LengthData.GetIntValueSafe());
var hash = HashFactory.Crypto.SHA3.CreateBlake256();
var shaWord = hash.ComputeBytes(buffer).GetBytes();
program.StackPush(shaWord);
program.Step();
break;
case SolidityOpCodes.MSIZE:
int memSize = program.GetMemorySize();
var sizeW = new DataWord(memSize);
program.StackPush(sizeW);
program.Step();
break;
case SolidityOpCodes.LOG0:
case SolidityOpCodes.LOG1:
case SolidityOpCodes.LOG2:
case SolidityOpCodes.LOG3:
case SolidityOpCodes.LOG4:
var logAdr = program.GetOwnerAddress();
var logMemStart = stack.Pop();
var logMemOffset = stack.Pop();
var nTopics = SizeSolidityCodes[opCode.Value] - SizeSolidityCodes[SolidityOpCodes.LOG0];
var topics = new List <DataWord>();
for (int i = 0; i < nTopics; ++i)
{
DataWord topic = stack.Pop();
topics.Add(topic);
}
var logData = program.ChunkMemory(logMemStart.GetIntValueSafe(), logMemOffset.GetIntValueSafe());
program.GetResult().AddLogInfo(new SolidityLogInfo(topics, logData));
program.Step();
break;
}
}