gaspersic/go-ethereum
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This commit is contained in:
obscuren
2014-04-11 13:29:57 -04:00
parent ca747f2688
commit 116516158d
6 changed files with 124 additions and 37 deletions
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98
ethchain/vm.go
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@ -2,7 +2,7 @@ package ethchain
import (
_ "bytes"
_ "fmt"
"fmt"
"github.com/ethereum/eth-go/ethutil"
_ "github.com/obscuren/secp256k1-go"
_ "math"
@ -33,13 +33,13 @@ type Vm struct {
}
type RuntimeVars struct {
origin []byte
blockNumber uint64
prevHash []byte
coinbase []byte
time int64
diff *big.Int
txData []string
Origin []byte
BlockNumber uint64
PrevHash []byte
Coinbase []byte
Time int64
Diff *big.Int
TxData []string
}
func NewVm(state *State, vars RuntimeVars) *Vm {
@ -65,9 +65,11 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) []byte {
// The base for all big integer arithmetic
base := new(big.Int)
if ethutil.Config.Debug {
ethutil.Config.Log.Debugf("# op\n")
}
/*
if ethutil.Config.Debug {
ethutil.Config.Log.Debugf("# op\n")
}
*/
for {
step++
@ -75,9 +77,11 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) []byte {
val := closure.Get(pc)
// Get the opcode (it must be an opcode!)
op := OpCode(val.Uint())
if ethutil.Config.Debug {
ethutil.Config.Log.Debugf("%-3d %-4s", pc, op.String())
}
/*
if ethutil.Config.Debug {
ethutil.Config.Log.Debugf("%-3d %-4s", pc, op.String())
}
*/
// TODO Get each instruction cost properly
gas := new(big.Int)
@ -270,7 +274,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) []byte {
case oBALANCE:
stack.Push(closure.Value)
case oORIGIN:
stack.Push(ethutil.BigD(vm.vars.origin))
stack.Push(ethutil.BigD(vm.vars.Origin))
case oCALLER:
stack.Push(ethutil.BigD(closure.Callee().Address()))
case oCALLVALUE:
@ -286,15 +290,15 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) []byte {
// 0x40 range
case oPREVHASH:
stack.Push(ethutil.BigD(vm.vars.prevHash))
stack.Push(ethutil.BigD(vm.vars.PrevHash))
case oCOINBASE:
stack.Push(ethutil.BigD(vm.vars.coinbase))
stack.Push(ethutil.BigD(vm.vars.Coinbase))
case oTIMESTAMP:
stack.Push(big.NewInt(vm.vars.time))
stack.Push(big.NewInt(vm.vars.Time))
case oNUMBER:
stack.Push(big.NewInt(int64(vm.vars.blockNumber)))
stack.Push(big.NewInt(int64(vm.vars.BlockNumber)))
case oDIFFICULTY:
stack.Push(vm.vars.diff)
stack.Push(vm.vars.Diff)
case oGASLIMIT:
// TODO
@ -406,7 +410,59 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) []byte {
pc.Add(pc, ethutil.Big1)
if hook != nil {
hook(op)
hook(op, mem, stack)
}
}
}
func Disassemble(script []byte) (asm []string) {
pc := new(big.Int)
for {
if pc.Cmp(big.NewInt(int64(len(script)))) >= 0 {
return
}
// Get the memory location of pc
val := script[pc.Int64()]
// Get the opcode (it must be an opcode!)
op := OpCode(val)
asm = append(asm, fmt.Sprintf("%v", op))
switch op {
case oPUSH: // Push PC+1 on to the stack
pc.Add(pc, ethutil.Big1)
data := script[pc.Int64() : pc.Int64()+32]
val := ethutil.BigD(data)
var b []byte
if val.Int64() == 0 {
b = []byte{0}
} else {
b = val.Bytes()
}
asm = append(asm, fmt.Sprintf("0x%x", b))
pc.Add(pc, big.NewInt(31))
case oPUSH20:
pc.Add(pc, ethutil.Big1)
data := script[pc.Int64() : pc.Int64()+20]
val := ethutil.BigD(data)
var b []byte
if val.Int64() == 0 {
b = []byte{0}
} else {
b = val.Bytes()
}
asm = append(asm, fmt.Sprintf("0x%x", b))
pc.Add(pc, big.NewInt(19))
}
pc.Add(pc, ethutil.Big1)
}
return
}