New OPCODES

* EXT- CODECOPY, CODESIZE

ethvm/types.go

@@ -49,6 +49,8 @@ const (
 	CODESIZE     = 0x38
 	CODECOPY     = 0x39
 	GASPRICE     = 0x3a
+	EXTCODECOPY  = 0x3b
+	EXTCODESIZE  = 0x3c
 
 	// 0x40 range - block operations
 	PREVHASH   = 0x40
@@ -146,6 +148,7 @@ const (
 	CALL          = 0xf1
 	RETURN        = 0xf2
 	POST          = 0xf3
+	CALLSTATELESS = 0xf4
 
 	// 0x70 range - other
 	LOG     = 0xfe // XXX Unofficial
@@ -203,6 +206,8 @@ var opCodeToString = map[OpCode]string{
 	NUMBER:      "NUMBER",
 	DIFFICULTY:  "DIFFICULTY",
 	GASLIMIT:    "GASLIMIT",
+	EXTCODESIZE: "EXTCODESIZE",
+	EXTCODECOPY: "EXTCODECOPY",
 
 	// 0x50 range - 'storage' and execution
 	POP: "POP",
@@ -291,6 +296,8 @@ var opCodeToString = map[OpCode]string{
 	CREATE:        "CREATE",
 	CALL:          "CALL",
 	RETURN:        "RETURN",
+	POST:          "POST",
+	CALLSTATELESS: "CALLSTATELESS",
 
 	// 0x70 range - other
 	LOG:     "LOG",
@@ -343,7 +350,12 @@ var OpCodes = map[string]byte{
 	"CALLVALUE":    0x34,
 	"CALLDATALOAD": 0x35,
 	"CALLDATASIZE": 0x36,
-	"GASPRICE":     0x38,
+	"CALLDATACOPY": 0x37,
+	"CODESIZE":     0x38,
+	"CODECOPY":     0x39,
+	"GASPRICE":     0x3a,
+	"EXTCODECOPY":  0x3b,
+	"EXTCODESIZE":  0x3c,
 
 	// 0x40 range - block operations
 	"PREVHASH":   0x40,
@@ -440,6 +452,7 @@ var OpCodes = map[string]byte{
 	"CALL":          0xf1,
 	"RETURN":        0xf2,
 	"POST":          0xf3,
+	"CALLSTATELESS": 0xf4,
 
 	// 0x70 range - other
 	"LOG":     0xfe,

ethvm/vm.go

@@ -197,6 +197,10 @@ func (self *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 			require(3)
 
 			newMemSize = stack.Peek().Uint64() + stack.data[stack.Len()-3].Uint64()
+		case EXTCODECOPY:
+			require(4)
+
+			newMemSize = stack.data[stack.Len()-1].Uint64() + stack.data[stack.Len()-4].Uint64()
 		case CALL:
 			require(7)
 			gas.Set(GasCall)
@@ -550,14 +554,32 @@ func (self *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 			code := closure.Args[cOff : cOff+l]
 
 			mem.Set(mOff, l, code)
-		case CODESIZE:
+		case CODESIZE, EXTCODESIZE:
-			l := big.NewInt(int64(len(closure.Code)))
+			var code []byte
+			if op == EXTCODECOPY {
+				addr := stack.Pop().Bytes()
+
+				code = self.env.State().GetCode(addr)
+			} else {
+				code = closure.Code
+			}
+
+			l := big.NewInt(int64(len(code)))
 			stack.Push(l)
 
 			self.Printf(" => %d", l)
-		case CODECOPY:
+		case CODECOPY, EXTCODECOPY:
+			var code []byte
+			if op == EXTCODECOPY {
+				addr := stack.Pop().Bytes()
+
+				code = self.env.State().GetCode(addr)
+			} else {
+				code = closure.Code
+			}
+
 			var (
-				size = int64(len(closure.Code))
+				size = int64(len(code))
 				mOff = stack.Pop().Int64()
 				cOff = stack.Pop().Int64()
 				l    = stack.Pop().Int64()
@@ -570,9 +592,9 @@ func (self *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 				l = 0
 			}
 
-			code := closure.Code[cOff : cOff+l]
+			codeCopy := code[cOff : cOff+l]
 
-			mem.Set(mOff, l, code)
+			mem.Set(mOff, l, codeCopy)
 		case GASPRICE:
 			stack.Push(closure.Price)