diff --git a/evmjit/libevmjit-cpp/Env.cpp b/evmjit/libevmjit-cpp/Env.cpp
index d1f239f9f..86a65dbab 100644
--- a/evmjit/libevmjit-cpp/Env.cpp
+++ b/evmjit/libevmjit-cpp/Env.cpp
@@ -64,19 +64,24 @@ extern "C"
 
 	EXPORT bool env_call(ExtVMFace* _env, int64_t* io_gas, int64_t _callGas, h256* _receiveAddress, i256* _value, byte* _inBeg, uint64_t _inSize, byte* _outBeg, uint64_t _outSize, h256* _codeAddress)
 	{
-		auto value = llvm2eth(*_value);
-		auto receiveAddress = right160(*_receiveAddress);
-		auto codeAddress = right160(*_codeAddress);
-		const auto isCall = receiveAddress == codeAddress; // OPT: The same address pointer can be used if not CODECALL
+		CallParameters params;
+		params.value = llvm2eth(*_value);
+		params.senderAddress = _env->myAddress;
+		params.receiveAddress = right160(*_receiveAddress);
+		params.codeAddress = right160(*_codeAddress);
+		params.data = {_inBeg, _inSize};
+		params.out = {_outBeg, _outSize};
+		params.onOp = {};
+		const auto isCall = params.receiveAddress == params.codeAddress; // OPT: The same address pointer can be used if not CODECALL
 
 		*io_gas -= _callGas;
 		if (*io_gas < 0)
 			return false;
 
-		if (isCall && !_env->exists(receiveAddress))
+		if (isCall && !_env->exists(params.receiveAddress))
 			*io_gas -= static_cast<int64_t>(c_callNewAccountGas); // no underflow, *io_gas non-negative before
 
-		if (value > 0) // value transfer
+		if (params.value > 0) // value transfer
 		{
 			/*static*/ assert(c_callValueTransferGas > c_callStipend && "Overflow possible");
 			*io_gas -= static_cast<int64_t>(c_callValueTransferGas); // no underflow
@@ -87,11 +92,11 @@ extern "C"
 			return false;
 
 		auto ret = false;
-		auto callGas = u256{_callGas};
-		if (_env->balance(_env->myAddress) >= value && _env->depth < 1024)
-			ret = _env->call(receiveAddress, value, {_inBeg, _inSize}, callGas, {_outBeg, _outSize}, {}, {}, codeAddress);
+		params.gas = u256{_callGas};
+		if (_env->balance(_env->myAddress) >= params.value && _env->depth < 1024)
+			ret = _env->call(params);
 
-		*io_gas += static_cast<int64_t>(callGas); // it is never more than initial _callGas
+		*io_gas += static_cast<int64_t>(params.gas); // it is never more than initial _callGas
 		return ret;
 	}
 
diff --git a/evmjit/libevmjit-cpp/JitVM.h b/evmjit/libevmjit-cpp/JitVM.h
index 58caa3648..38ef9ff61 100644
--- a/evmjit/libevmjit-cpp/JitVM.h
+++ b/evmjit/libevmjit-cpp/JitVM.h
@@ -12,10 +12,14 @@ class JitVM: public VMFace
 {
 	virtual bytesConstRef go(ExtVMFace& _ext, OnOpFunc const& _onOp = {}, uint64_t _steps = (uint64_t)-1) override final;
 
+	virtual u256 gas() const noexcept { return m_gas; }
+	virtual void reset(u256 const& _gas = 0) noexcept { m_gas = _gas; }
+
 private:
 	friend class VMFactory;
-	explicit JitVM(u256 _gas = 0) : VMFace(_gas) {}
+	explicit JitVM(u256 _gas = 0): m_gas(_gas) {}
 
+	u256 m_gas;
 	jit::RuntimeData m_data;
 	jit::ExecutionEngine m_engine;
 	std::unique_ptr<VMFace> m_fallbackVM; ///< VM used in case of input data rejected by JIT
diff --git a/libethcore/Ethash.cpp b/libethcore/Ethash.cpp
index 228f03f8e..24a6ab41e 100644
--- a/libethcore/Ethash.cpp
+++ b/libethcore/Ethash.cpp
@@ -142,7 +142,7 @@ void Ethash::CPUMiner::workLoop()
 	WorkPackage w = work();
 
 	EthashAux::FullType dag;
-	while (!shouldStop() && !(dag = EthashAux::full(w.seedHash)))
+	while (!shouldStop() && !(dag = EthashAux::full(w.seedHash, true)))
 		this_thread::sleep_for(chrono::milliseconds(500));
 
 	h256 boundary = w.boundary;
diff --git a/libethcore/Miner.h b/libethcore/Miner.h
index cede34475..11b9ae140 100644
--- a/libethcore/Miner.h
+++ b/libethcore/Miner.h
@@ -44,7 +44,7 @@ struct MiningProgress
 //	MiningProgress& operator+=(MiningProgress const& _mp) { hashes += _mp.hashes; ms = std::max(ms, _mp.ms); return *this; }
 	uint64_t hashes = 0;		///< Total number of hashes computed.
 	uint64_t ms = 0;			///< Total number of milliseconds of mining thus far.
-	uint64_t rate() const { return hashes * 1000 / ms; }
+	uint64_t rate() const { return ms == 0 ? 0 : hashes * 1000 / ms; }
 };
 
 struct MineInfo: public MiningProgress {};