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instructions.go
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instructions.go
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// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package evm
import (
"github.com/holiman/uint256"
"github.com/lyonnee/evm/math"
"github.com/lyonnee/evm/params"
)
func opAdd(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := scope.Stack.pop(), scope.Stack.peek()
y.Add(&x, y)
return nil, nil
}
func opSub(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := scope.Stack.pop(), scope.Stack.peek()
y.Sub(&x, y)
return nil, nil
}
func opMul(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := scope.Stack.pop(), scope.Stack.peek()
y.Mul(&x, y)
return nil, nil
}
func opDiv(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := scope.Stack.pop(), scope.Stack.peek()
y.Div(&x, y)
return nil, nil
}
func opSdiv(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := scope.Stack.pop(), scope.Stack.peek()
y.SDiv(&x, y)
return nil, nil
}
func opMod(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := scope.Stack.pop(), scope.Stack.peek()
y.Mod(&x, y)
return nil, nil
}
func opSmod(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := scope.Stack.pop(), scope.Stack.peek()
y.SMod(&x, y)
return nil, nil
}
func opExp(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := scope.Stack.pop(), scope.Stack.peek()
y.Exp(&x, y)
return nil, nil
}
func opSignExtend(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
back, num := scope.Stack.pop(), scope.Stack.peek()
num.ExtendSign(num, &back)
return nil, nil
}
func opNot(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x := scope.Stack.peek()
x.Not(x)
return nil, nil
}
func opLt(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := scope.Stack.pop(), scope.Stack.peek()
if x.Lt(y) {
y.SetOne()
} else {
y.Clear()
}
return nil, nil
}
func opGt(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := scope.Stack.pop(), scope.Stack.peek()
if x.Gt(y) {
y.SetOne()
} else {
y.Clear()
}
return nil, nil
}
func opSlt(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := scope.Stack.pop(), scope.Stack.peek()
if x.Slt(y) {
y.SetOne()
} else {
y.Clear()
}
return nil, nil
}
func opSgt(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := scope.Stack.pop(), scope.Stack.peek()
if x.Sgt(y) {
y.SetOne()
} else {
y.Clear()
}
return nil, nil
}
func opEq(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := scope.Stack.pop(), scope.Stack.peek()
if x.Eq(y) {
y.SetOne()
} else {
y.Clear()
}
return nil, nil
}
func opIszero(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x := scope.Stack.peek()
if x.IsZero() {
x.SetOne()
} else {
x.Clear()
}
return nil, nil
}
func opAnd(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := scope.Stack.pop(), scope.Stack.peek()
y.And(&x, y)
return nil, nil
}
func opOr(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := scope.Stack.pop(), scope.Stack.peek()
y.Or(&x, y)
return nil, nil
}
func opXor(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := scope.Stack.pop(), scope.Stack.peek()
y.Xor(&x, y)
return nil, nil
}
func opByte(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
th, val := scope.Stack.pop(), scope.Stack.peek()
val.Byte(&th)
return nil, nil
}
func opAddmod(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y, z := scope.Stack.pop(), scope.Stack.pop(), scope.Stack.peek()
if z.IsZero() {
z.Clear()
} else {
z.AddMod(&x, &y, z)
}
return nil, nil
}
func opMulmod(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y, z := scope.Stack.pop(), scope.Stack.pop(), scope.Stack.peek()
z.MulMod(&x, &y, z)
return nil, nil
}
// opSHL implements Shift Left
// The SHL instruction (shift left) pops 2 values from the stack, first arg1 and then arg2,
// and pushes on the stack arg2 shifted to the left by arg1 number of bits.
func opSHL(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
shift, val := scope.Stack.pop(), scope.Stack.peek()
if shift.LtUint64(256) {
val.Lsh(val, uint(shift.Uint64()))
} else {
val.Clear()
}
return nil, nil
}
// opSHR implements Logical Shift Right
// The SHR instruction (logical shift right) pops 2 values from the stack, first arg1 and then arg2,
// and pushes on the stack arg2 shifted to the right by arg1 number of bits with zero fill.
func opSHR(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
// Note, second operand is left in the stack; accumulate result into it, and no need to push it afterwards
shift, value := scope.Stack.pop(), scope.Stack.peek()
if shift.LtUint64(256) {
value.Rsh(value, uint(shift.Uint64()))
} else {
value.Clear()
}
return nil, nil
}
// opSAR implements Arithmetic Shift Right
// The SAR instruction (arithmetic shift right) pops 2 values from the stack, first arg1 and then arg2,
// and pushes on the stack arg2 shifted to the right by arg1 number of bits with sign extension.
func opSAR(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
shift, val := scope.Stack.pop(), scope.Stack.peek()
if shift.GtUint64(256) {
if val.Sign() >= 0 {
val.Clear()
} else {
val.SetAllOne()
}
return nil, nil
}
val.SRsh(val, uint(shift.Uint64()))
return nil, nil
}
func opKeccak256(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
// 从Stack获取数据在memory数据的位置和大小
offset, size := scope.Stack.pop(), scope.Stack.peek()
// 从Memory中获取数据指针
data := scope.Memory.GetPtr(offset.ToBig().Int64(), size.ToBig().Int64())
// 如果解释器的hasher为空,则新建一个keccak256哈希状态机,否则重置现有的hasher
if interpreter.hasher == nil {
interpreter.hasher = NewKeccakState()
} else {
interpreter.hasher.Reset()
}
// 向hasher中写入待哈希的数据data
interpreter.hasher.Write(data)
// 从hasher中读取结果到固定大小的缓冲区interpreter.hasherBuf中
interpreter.hasher.Read(interpreter.hasherBuf[:])
// 如果配置了preimage记录,则将原数据和哈希结果添加到状态数据库的preimage映射中
if interpreter.evm.Config.EnablePreimageRecording {
interpreter.evm.StateDB.AddPreimage(BytesToHash(data), interpreter.hasherBuf[:])
}
// 更新Stack顶部数据
size.SetBytes(interpreter.hasherBuf[:])
return nil, nil
}
// 将当前合约地址压入Stack顶部
func opAddress(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.push(new(uint256.Int).SetBytes(AddrToBytes(scope.Contract.Address())))
return nil, nil
}
func opBalance(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
// 从Stack顶取出要查询的地址
slot := scope.Stack.peek()
address := BytesToAddr(slot.Bytes())
// 从evm实例的statedb中查询余额,并写回Stack顶部
slot.SetFromBig(interpreter.evm.StateDB.GetBalance(address))
return nil, nil
}
func opOrigin(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.push(new(uint256.Int).SetBytes(AddrToBytes(interpreter.evm.Origin)))
return nil, nil
}
func opCaller(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.push(new(uint256.Int).SetBytes(AddrToBytes(scope.Contract.Caller())))
return nil, nil
}
func opCallValue(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.push(new(uint256.Int).SetBytes(scope.Contract.value.Bytes()))
return nil, nil
}
// 读取调用合约时的calldata数据放入Stack顶部
func opCallDataLoad(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x := scope.Stack.peek()
if offset, overflow := x.Uint64WithOverflow(); !overflow {
data := getData(scope.Contract.Input, offset, 32)
x.SetBytes(data)
} else {
x.Clear()
}
return nil, nil
}
func opCallDataSize(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.push(new(uint256.Int).SetUint64(uint64(len(scope.Contract.Input))))
return nil, nil
}
// 复制calldata数据到memory中
func opCallDataCopy(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
var (
memOffset = scope.Stack.pop()
dataOffset = scope.Stack.pop()
length = scope.Stack.pop()
)
// 在计算gas成本时,要检查这些值是否有溢出
dataOffset64, overflow := dataOffset.Uint64WithOverflow()
if overflow {
dataOffset64 = 0xffffffffffffffff
}
memOffset64 := memOffset.Uint64()
length64 := length.Uint64()
scope.Memory.Set(memOffset64, length64, getData(scope.Contract.Input, dataOffset64, length64))
return nil, nil
}
func opReturnDataSize(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.push(new(uint256.Int).SetUint64(uint64(len(interpreter.returnData))))
return nil, nil
}
func opReturnDataCopy(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
var (
memOffset = scope.Stack.pop()
dataOffset = scope.Stack.pop()
length = scope.Stack.pop()
)
offset64, overflow := dataOffset.Uint64WithOverflow()
if overflow {
return nil, ErrReturnDataOutOfBounds
}
var end = dataOffset
end.Add(&dataOffset, &length)
end64, overflow := end.Uint64WithOverflow()
if overflow || uint64(len(interpreter.returnData)) < end64 {
return nil, ErrReturnDataOutOfBounds
}
scope.Memory.Set(memOffset.Uint64(), length.Uint64(), interpreter.returnData[offset64:end64])
return nil, nil
}
func opExtCodeSize(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
slot := scope.Stack.peek()
slot.SetUint64(uint64(interpreter.evm.StateDB.GetCodeSize(BytesToAddr(slot.Bytes()))))
return nil, nil
}
func opCodeSize(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.push(new(uint256.Int).SetUint64(uint64(len(scope.Contract.Code))))
return nil, nil
}
func opCodeCopy(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
var (
memOffset = scope.Stack.pop()
dataOffset = scope.Stack.pop()
length = scope.Stack.pop()
)
uint64CodeOffset, overflow := dataOffset.Uint64WithOverflow()
if overflow {
uint64CodeOffset = 0xffffffffffffffff
}
codeCopy := getData(scope.Contract.Code, uint64CodeOffset, length.Uint64())
scope.Memory.Set(memOffset.Uint64(), length.Uint64(), codeCopy)
return nil, nil
}
func opExtCodeCopy(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
var (
a = scope.Stack.pop()
memOffset = scope.Stack.pop()
codeOffset = scope.Stack.pop()
length = scope.Stack.pop()
)
uint64CodeOffset, overflow := codeOffset.Uint64WithOverflow()
if overflow {
uint64CodeOffset = 0xffffffffffffffff
}
addr := BytesToAddr(a.Bytes())
codeCopy := getData(interpreter.evm.StateDB.GetCode(addr), uint64CodeOffset, length.Uint64())
scope.Memory.Set(memOffset.Uint64(), length.Uint64(), codeCopy)
return nil, nil
}
// 获取指定账户的代码哈希
// 对正常合约账户,返回其代码哈希
// 对不存在的账户,返回0
// 对无代码的账户,返回空代码哈希0xc5d24601...
// 对预编译合约账户,返回0或空代码哈希
// 对本交易标记为自毁的账户,返回其代码哈希
// 对已删除的账户,视为不存在账户,返回0
func opExtCodeHash(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
slot := scope.Stack.peek()
address := BytesToAddr(slot.Bytes())
if interpreter.evm.StateDB.Empty(address) {
slot.Clear()
} else {
slot.SetBytes(HashToBytes(interpreter.evm.StateDB.GetCodeHash(address)))
}
return nil, nil
}
func opGasprice(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.push(new(uint256.Int).SetBytes(interpreter.evm.GasPrice.Bytes()))
return nil, nil
}
// 读取blockhash放在Stack顶部
func opBlockhash(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
num := scope.Stack.peek()
num64, overflow := num.Uint64WithOverflow()
if overflow {
num.Clear()
return nil, nil
}
var upper, lower uint64
upper = interpreter.evm.Context.BlockNumber.Uint64()
if upper < 257 {
lower = 0
} else {
lower = upper - 256
}
if num64 >= lower && num64 < upper {
hash := interpreter.evm.Context.GetHash(num64)
num.SetBytes(hash[:])
} else {
num.Clear()
}
return nil, nil
}
func opCoinbase(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.push(new(uint256.Int).SetBytes(AddrToBytes(interpreter.evm.Context.Coinbase)))
return nil, nil
}
func opTimestamp(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.push(new(uint256.Int).SetUint64(interpreter.evm.Context.Time))
return nil, nil
}
func opNumber(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
v, _ := uint256.FromBig(interpreter.evm.Context.BlockNumber)
scope.Stack.push(v)
return nil, nil
}
func opDifficulty(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
v, _ := uint256.FromBig(interpreter.evm.Context.Difficulty)
scope.Stack.push(v)
return nil, nil
}
func opRandom(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
v := new(uint256.Int).SetBytes(interpreter.evm.Context.Random[:])
scope.Stack.push(v)
return nil, nil
}
func opGasLimit(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.push(new(uint256.Int).SetUint64(interpreter.evm.Context.GasLimit))
return nil, nil
}
func opPop(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.pop()
return nil, nil
}
// 从Memory读取数据指针保存在Stack顶部
func opMload(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
v := scope.Stack.peek()
offset := int64(v.Uint64())
v.SetBytes(scope.Memory.GetPtr(offset, 32))
return nil, nil
}
// 取出Stack顶部数据保存到Memory中
func opMstore(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
mStart, val := scope.Stack.pop(), scope.Stack.pop()
scope.Memory.Set32(mStart.Uint64(), &val)
return nil, nil
}
func opMstore8(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
offset, val := scope.Stack.pop(), scope.Stack.pop()
scope.Memory.store[offset.Uint64()] = byte(val.Uint64())
return nil, nil
}
func opSload(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
loc := scope.Stack.peek()
hash := BytesToHash(loc.Bytes())
val := interpreter.evm.StateDB.GetState(scope.Contract.Address(), hash)
loc.SetBytes(val[:])
return nil, nil
}
// 持久化数据到db
func opSstore(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
if interpreter.readOnly {
return nil, ErrWriteProtection
}
loc := scope.Stack.pop()
val := scope.Stack.pop()
interpreter.evm.StateDB.SetState(scope.Contract.Address(), BytesToHash(loc.Bytes()), BytesToHash(val.Bytes()))
return nil, nil
}
// 指令跳转
func opJump(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
if interpreter.evm.abort.Load() {
return nil, errStopToken
}
// 从Stack获取下一条指令的位置
pos := scope.Stack.pop()
if !scope.Contract.validJumpdest(&pos) {
return nil, ErrInvalidJump
}
// 修改pc(程序计数器)
*pc = pos.Uint64() - 1 // PC将通过解释器循环增加
return nil, nil
}
func opJumpi(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
if interpreter.evm.abort.Load() {
return nil, errStopToken
}
pos, cond := scope.Stack.pop(), scope.Stack.pop()
if !cond.IsZero() {
if !scope.Contract.validJumpdest(&pos) {
return nil, ErrInvalidJump
}
*pc = pos.Uint64() - 1
}
return nil, nil
}
func opJumpdest(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
return nil, nil
}
func opPc(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.push(new(uint256.Int).SetUint64(*pc))
return nil, nil
}
func opMsize(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.push(new(uint256.Int).SetUint64(uint64(scope.Memory.Len())))
return nil, nil
}
func opGas(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.push(new(uint256.Int).SetUint64(scope.Contract.Gas))
return nil, nil
}
func opCreate(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
if interpreter.readOnly {
return nil, ErrWriteProtection
}
var (
value = scope.Stack.pop()
offset, size = scope.Stack.pop(), scope.Stack.pop()
input = scope.Memory.GetCopy(int64(offset.Uint64()), int64(size.Uint64()))
gas = scope.Contract.Gas
)
if interpreter.evm.chainRules.IsEIP158 {
gas -= gas / 64
}
scope.Contract.UseGas(gas)
stackvalue := size
var bigVal = math.Big0
if !value.IsZero() {
bigVal = value.ToBig()
}
res, addr, returnGas, suberr := interpreter.evm.Create(scope.Contract, input, gas, bigVal)
// 根据返回的错误将item压入堆栈
// 如果规则集是homestead,我们必须检查CodeStoreOutOfGasError(仅homestead规则)并将其视为错误
if interpreter.evm.chainRules.IsHomestead && suberr == ErrCodeStoreOutOfGas {
stackvalue.Clear()
} else if suberr != nil && suberr != ErrCodeStoreOutOfGas {
stackvalue.Clear()
} else {
stackvalue.SetBytes(AddrToBytes(addr))
}
scope.Stack.push(&stackvalue)
// gas返还
scope.Contract.Gas += returnGas
if suberr == ErrExecutionReverted {
interpreter.returnData = res
return res, nil
}
interpreter.returnData = nil
return nil, nil
}
func opCreate2(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
if interpreter.readOnly {
return nil, ErrWriteProtection
}
var (
endowment = scope.Stack.pop()
offset, size = scope.Stack.pop(), scope.Stack.pop()
salt = scope.Stack.pop()
input = scope.Memory.GetCopy(int64(offset.Uint64()), int64(size.Uint64()))
gas = scope.Contract.Gas
)
gas -= gas / 64
scope.Contract.UseGas(gas)
stackvalue := size
bigEndowment := math.Big0
if !endowment.IsZero() {
bigEndowment = endowment.ToBig()
}
res, addr, returnGas, suberr := interpreter.evm.Create2(scope.Contract, input, gas, bigEndowment, &salt)
if suberr != nil {
stackvalue.Clear()
} else {
stackvalue.SetBytes(AddrToBytes(addr))
}
scope.Stack.push(&stackvalue)
scope.Contract.Gas += returnGas
if suberr == ErrExecutionReverted {
interpreter.returnData = res
return res, nil
}
interpreter.returnData = nil
return nil, nil
}
func opCall(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
// 从Stack取出调用参数
var (
temp = scope.Stack.pop()
addr = scope.Stack.pop()
val = scope.Stack.pop()
inOffset = scope.Stack.pop()
inSize = scope.Stack.pop()
retOffset = scope.Stack.pop()
retSize = scope.Stack.pop()
)
gas := interpreter.evm.callGasTemp
toAddr := BytesToAddr(addr.Bytes())
// 从Memory取出数据指针
args := scope.Memory.GetPtr(int64(inOffset.Uint64()), int64(inSize.Uint64()))
if interpreter.readOnly && !val.IsZero() {
return nil, ErrWriteProtection
}
var bigVal = math.Big0
if !val.IsZero() {
gas += params.CallStipend
bigVal = val.ToBig()
}
ret, returnGas, err := interpreter.evm.Call(scope.Contract, toAddr, args, gas, bigVal)
if err != nil {
temp.Clear()
} else {
temp.SetOne()
}
scope.Stack.push(&temp)
if err == nil || err == ErrExecutionReverted {
scope.Memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
}
scope.Contract.Gas += returnGas
interpreter.returnData = ret
return ret, nil
}
func opCallCode(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
var (
temp = scope.Stack.pop()
addr = scope.Stack.pop()
val = scope.Stack.pop()
inOffset = scope.Stack.pop()
inSize = scope.Stack.pop()
retOffset = scope.Stack.pop()
retSize = scope.Stack.pop()
)
gas := interpreter.evm.callGasTemp
toAddr := BytesToAddr(addr.Bytes())
args := scope.Memory.GetPtr(int64(inOffset.Uint64()), int64(inSize.Uint64()))
var bigVal = math.Big0
if !val.IsZero() {
gas += params.CallStipend
bigVal = val.ToBig()
}
ret, returnGas, err := interpreter.evm.CallCode(scope.Contract, toAddr, args, gas, bigVal)
if err != nil {
temp.Clear()
} else {
temp.SetOne()
}
scope.Stack.push(&temp)
if err == nil || err == ErrExecutionReverted {
scope.Memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
}
scope.Contract.Gas += returnGas
interpreter.returnData = ret
return ret, nil
}
func opDelegateCall(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
var (
temp = scope.Stack.pop()
addr = scope.Stack.pop()
inOffset = scope.Stack.pop()
inSize = scope.Stack.pop()
retOffset = scope.Stack.pop()
retSize = scope.Stack.pop()
)
gas := interpreter.evm.callGasTemp
toAddr := BytesToAddr(addr.Bytes())
args := scope.Memory.GetPtr(int64(inOffset.Uint64()), int64(inSize.Uint64()))
ret, returnGas, err := interpreter.evm.DelegateCall(scope.Contract, toAddr, args, gas)
if err != nil {
temp.Clear()
} else {
temp.SetOne()
}
scope.Stack.push(&temp)
if err == nil || err == ErrExecutionReverted {
scope.Memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
}
scope.Contract.Gas += returnGas
interpreter.returnData = ret
return ret, nil
}
func opStaticCall(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
var (
temp = scope.Stack.pop()
addr = scope.Stack.pop()
inOffset = scope.Stack.pop()
inSize = scope.Stack.pop()
retOffset = scope.Stack.pop()
retSize = scope.Stack.pop()
)
gas := interpreter.evm.callGasTemp
toAddr := BytesToAddr(addr.Bytes())
args := scope.Memory.GetPtr(int64(inOffset.Uint64()), int64(inSize.Uint64()))
ret, returnGas, err := interpreter.evm.StaticCall(scope.Contract, toAddr, args, gas)
if err != nil {
temp.Clear()
} else {
temp.SetOne()
}
scope.Stack.push(&temp)
if err == nil || err == ErrExecutionReverted {
scope.Memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
}
scope.Contract.Gas += returnGas
interpreter.returnData = ret
return ret, nil
}
func opReturn(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
offset, size := scope.Stack.pop(), scope.Stack.pop()
ret := scope.Memory.GetPtr(int64(offset.Uint64()), int64(size.Uint64()))
return ret, errStopToken
}
func opRevert(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
offset, size := scope.Stack.pop(), scope.Stack.pop()
ret := scope.Memory.GetPtr(int64(offset.Uint64()), int64(size.Uint64()))
interpreter.returnData = ret
return ret, ErrExecutionReverted
}
func opUndefined(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
return nil, &ErrInvalidOpCode{opcode: OpCode(scope.Contract.Code[*pc])}
}
func opStop(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
return nil, errStopToken
}
// 旧式opSelfdestruct
// 被销毁账户的余额会转到接收账户,gas费用由调用合约支付
func opSelfdestruct(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
if interpreter.readOnly {
return nil, ErrWriteProtection
}
// 销毁合约会把合约余额返还给指定地址
// 受益人地址
beneficiary := scope.Stack.pop()
// 合约地址余额
balance := interpreter.evm.StateDB.GetBalance(scope.Contract.Address())
// 更新受益人地址余额
interpreter.evm.StateDB.AddBalance(BytesToAddr(beneficiary.Bytes()), balance)
interpreter.evm.StateDB.SelfDestruct(scope.Contract.Address())
if tracer := interpreter.evm.Config.Tracer; tracer != nil {
tracer.CaptureEnter(SELFDESTRUCT, scope.Contract.Address(), BytesToAddr(beneficiary.Bytes()), []byte{}, 0, balance)
tracer.CaptureExit([]byte{}, 0, nil)
}
return nil, errStopToken
}
/*
EIP-6780提出的新自毁操作码,具有以下特点:
被销毁账户需要支付销毁本身所消耗的基础gas。
如果被销毁账户余额不足,则自毁动作会被撤销。
调用合约只需要支付与状态变更相关的gas费用。
这避免了调用合约支付大量gas的问题。
也鼓励提前清空被销毁账户,否则自毁会失败。
*/
func opSelfdestruct6780(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
if interpreter.readOnly {
return nil, ErrWriteProtection
}
beneficiary := scope.Stack.pop()
balance := interpreter.evm.StateDB.GetBalance(scope.Contract.Address())
interpreter.evm.StateDB.SubBalance(scope.Contract.Address(), balance)
interpreter.evm.StateDB.AddBalance(BytesToAddr(beneficiary.Bytes()), balance)
interpreter.evm.StateDB.Selfdestruct6780(scope.Contract.Address())
if tracer := interpreter.evm.Config.Tracer; tracer != nil {
tracer.CaptureEnter(SELFDESTRUCT, scope.Contract.Address(), BytesToAddr(beneficiary.Bytes()), []byte{}, 0, balance)
tracer.CaptureExit([]byte{}, 0, nil)
}
return nil, errStopToken
}
func opPush1(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
var (
codeLen = uint64(len(scope.Contract.Code))
integer = new(uint256.Int)
)
*pc += 1
if *pc < codeLen {
scope.Stack.push(integer.SetUint64(uint64(scope.Contract.Code[*pc])))
} else {
scope.Stack.push(integer.Clear())
}
return nil, nil
}
// 生成指定数量日志指令
// size: 日志数量
func makeLog(size int) executionFunc {
return func(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
if interpreter.readOnly {
return nil, ErrWriteProtection
}
topics := make([]Hash, size)
mStart, mSize := scope.Stack.pop(), scope.Stack.pop()
for i := 0; i < size; i++ {
addr := scope.Stack.pop()
topics[i] = Hash(addr.Bytes())
}
d := scope.Memory.GetCopy(int64(mStart.Uint64()), int64(mSize.Uint64()))
interpreter.evm.StateDB.AddLog(NewLog(scope.Contract.Address(), topics, d, interpreter.evm.Context.BlockNumber.Uint64()))
return nil, nil
}
}
// 生成指定长度的Push指令
func makePush(size uint64, pushByteSize int) executionFunc {
return func(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
codeLen := len(scope.Contract.Code)
startMin := codeLen
if int(*pc+1) < startMin {
startMin = int(*pc + 1)
}
endMin := codeLen
if startMin+pushByteSize < endMin {
endMin = startMin + pushByteSize
}
scope.Stack.push(new(uint256.Int).SetBytes(rightPadBytes(
scope.Contract.Code[startMin:endMin], pushByteSize)))
*pc += size
return nil, nil
}
}
// 生成指定长度复制指令
func makeDup(size int64) executionFunc {
return func(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.dup(int(size))
return nil, nil
}
}
// 生成指定长度的交换指令
func makeSwap(size int64) executionFunc {
// 交换n + 1,否则n就会和n交换
size++
return func(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.swap(int(size))
return nil, nil
}
}
// opMcopy implements the MCOPY opcode (https://eips.ethereum.org/EIPS/eip-5656)
func opMcopy(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
var (
dst = scope.Stack.pop()
src = scope.Stack.pop()
length = scope.Stack.pop()
)
// These values are checked for overflow during memory expansion calculation
// (the memorySize function on the opcode).
scope.Memory.Copy(dst.Uint64(), src.Uint64(), length.Uint64())
return nil, nil
}
// opBlobHash implements the BLOBHASH opcode
func opBlobHash(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
index := scope.Stack.peek()
if index.LtUint64(uint64(len(interpreter.evm.TxContext.BlobHashes))) {
blobHash := interpreter.evm.TxContext.BlobHashes[index.Uint64()]
index.SetBytes(blobHash[:])
} else {
index.Clear()
}
return nil, nil
}
func opSelfBalance(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
balance, _ := uint256.FromBig(interpreter.evm.StateDB.GetBalance(scope.Contract.Address()))
scope.Stack.push(balance)
return nil, nil
}
// opTload implements TLOAD opcode
func opTload(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
loc := scope.Stack.peek()
hash := BytesToHash(loc.Bytes())
val := interpreter.evm.StateDB.GetTransientState(scope.Contract.Address(), hash)
loc.SetBytes(val[:])
return nil, nil
}
// opTstore implements TSTORE opcode
func opTstore(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
if interpreter.readOnly {
return nil, ErrWriteProtection
}
loc := scope.Stack.pop()
val := scope.Stack.pop()
interpreter.evm.StateDB.SetTransientState(scope.Contract.Address(), BytesToHash(loc.Bytes()), BytesToHash(val.Bytes()))
return nil, nil
}
// opBaseFee implements BASEFEE opcode
func opBaseFee(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
baseFee, _ := uint256.FromBig(interpreter.evm.Context.BaseFee)
scope.Stack.push(baseFee)
return nil, nil
}
// opPush0 implements the PUSH0 opcode
func opPush0(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
scope.Stack.push(new(uint256.Int))
return nil, nil
}
// opChainID implements CHAINID opcode
func opChainID(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
chainId, _ := uint256.FromBig(interpreter.evm.chainRules.ChainID)
scope.Stack.push(chainId)
return nil, nil
}