bbc4ea4ae8
The run loop, which previously contained custom opcode executes have been removed and has been simplified to a few checks. Each operation consists of 4 elements: execution function, gas cost function, stack validation function and memory size function. The execution function implements the operation's runtime behaviour, the gas cost function implements the operation gas costs function and greatly depends on the memory and stack, the stack validation function validates the stack and makes sure that enough items can be popped off and pushed on and the memory size function calculates the memory required for the operation and returns it. This commit also allows the EVM to go unmetered. This is helpful for offline operations such as contract calls.
641 lines
19 KiB
Go
641 lines
19 KiB
Go
// 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 vm
|
|
|
|
import (
|
|
"fmt"
|
|
"math/big"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/common/math"
|
|
"github.com/ethereum/go-ethereum/crypto"
|
|
"github.com/ethereum/go-ethereum/params"
|
|
)
|
|
|
|
func opAdd(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x, y := stack.pop(), stack.pop()
|
|
stack.push(U256(x.Add(x, y)))
|
|
return nil, nil
|
|
}
|
|
|
|
func opSub(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x, y := stack.pop(), stack.pop()
|
|
stack.push(U256(x.Sub(x, y)))
|
|
return nil, nil
|
|
}
|
|
|
|
func opMul(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x, y := stack.pop(), stack.pop()
|
|
stack.push(U256(x.Mul(x, y)))
|
|
return nil, nil
|
|
}
|
|
|
|
func opDiv(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x, y := stack.pop(), stack.pop()
|
|
if y.Cmp(common.Big0) != 0 {
|
|
stack.push(U256(x.Div(x, y)))
|
|
} else {
|
|
stack.push(new(big.Int))
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func opSdiv(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x, y := S256(stack.pop()), S256(stack.pop())
|
|
if y.Cmp(common.Big0) == 0 {
|
|
stack.push(new(big.Int))
|
|
return nil, nil
|
|
} else {
|
|
n := new(big.Int)
|
|
if new(big.Int).Mul(x, y).Cmp(common.Big0) < 0 {
|
|
n.SetInt64(-1)
|
|
} else {
|
|
n.SetInt64(1)
|
|
}
|
|
|
|
res := x.Div(x.Abs(x), y.Abs(y))
|
|
res.Mul(res, n)
|
|
|
|
stack.push(U256(res))
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func opMod(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x, y := stack.pop(), stack.pop()
|
|
if y.Cmp(common.Big0) == 0 {
|
|
stack.push(new(big.Int))
|
|
} else {
|
|
stack.push(U256(x.Mod(x, y)))
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func opSmod(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x, y := S256(stack.pop()), S256(stack.pop())
|
|
|
|
if y.Cmp(common.Big0) == 0 {
|
|
stack.push(new(big.Int))
|
|
} else {
|
|
n := new(big.Int)
|
|
if x.Cmp(common.Big0) < 0 {
|
|
n.SetInt64(-1)
|
|
} else {
|
|
n.SetInt64(1)
|
|
}
|
|
|
|
res := x.Mod(x.Abs(x), y.Abs(y))
|
|
res.Mul(res, n)
|
|
|
|
stack.push(U256(res))
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func opExp(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
base, exponent := stack.pop(), stack.pop()
|
|
stack.push(math.Exp(base, exponent))
|
|
return nil, nil
|
|
}
|
|
|
|
func opSignExtend(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
back := stack.pop()
|
|
if back.Cmp(big.NewInt(31)) < 0 {
|
|
bit := uint(back.Uint64()*8 + 7)
|
|
num := stack.pop()
|
|
mask := back.Lsh(common.Big1, bit)
|
|
mask.Sub(mask, common.Big1)
|
|
if common.BitTest(num, int(bit)) {
|
|
num.Or(num, mask.Not(mask))
|
|
} else {
|
|
num.And(num, mask)
|
|
}
|
|
|
|
stack.push(U256(num))
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func opNot(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x := stack.pop()
|
|
stack.push(U256(x.Not(x)))
|
|
return nil, nil
|
|
}
|
|
|
|
func opLt(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x, y := stack.pop(), stack.pop()
|
|
if x.Cmp(y) < 0 {
|
|
stack.push(big.NewInt(1))
|
|
} else {
|
|
stack.push(new(big.Int))
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func opGt(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x, y := stack.pop(), stack.pop()
|
|
if x.Cmp(y) > 0 {
|
|
stack.push(big.NewInt(1))
|
|
} else {
|
|
stack.push(new(big.Int))
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func opSlt(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x, y := S256(stack.pop()), S256(stack.pop())
|
|
if x.Cmp(S256(y)) < 0 {
|
|
stack.push(big.NewInt(1))
|
|
} else {
|
|
stack.push(new(big.Int))
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func opSgt(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x, y := S256(stack.pop()), S256(stack.pop())
|
|
if x.Cmp(y) > 0 {
|
|
stack.push(big.NewInt(1))
|
|
} else {
|
|
stack.push(new(big.Int))
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func opEq(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x, y := stack.pop(), stack.pop()
|
|
if x.Cmp(y) == 0 {
|
|
stack.push(big.NewInt(1))
|
|
} else {
|
|
stack.push(new(big.Int))
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func opIszero(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x := stack.pop()
|
|
if x.Cmp(common.Big0) > 0 {
|
|
stack.push(new(big.Int))
|
|
} else {
|
|
stack.push(big.NewInt(1))
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func opAnd(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x, y := stack.pop(), stack.pop()
|
|
stack.push(x.And(x, y))
|
|
return nil, nil
|
|
}
|
|
func opOr(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x, y := stack.pop(), stack.pop()
|
|
stack.push(x.Or(x, y))
|
|
return nil, nil
|
|
}
|
|
func opXor(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x, y := stack.pop(), stack.pop()
|
|
stack.push(x.Xor(x, y))
|
|
return nil, nil
|
|
}
|
|
func opByte(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
th, val := stack.pop(), stack.pop()
|
|
if th.Cmp(big.NewInt(32)) < 0 {
|
|
byte := big.NewInt(int64(common.LeftPadBytes(val.Bytes(), 32)[th.Int64()]))
|
|
stack.push(byte)
|
|
} else {
|
|
stack.push(new(big.Int))
|
|
}
|
|
return nil, nil
|
|
}
|
|
func opAddmod(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x, y, z := stack.pop(), stack.pop(), stack.pop()
|
|
if z.Cmp(Zero) > 0 {
|
|
add := x.Add(x, y)
|
|
add.Mod(add, z)
|
|
stack.push(U256(add))
|
|
} else {
|
|
stack.push(new(big.Int))
|
|
}
|
|
return nil, nil
|
|
}
|
|
func opMulmod(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
x, y, z := stack.pop(), stack.pop(), stack.pop()
|
|
if z.Cmp(Zero) > 0 {
|
|
mul := x.Mul(x, y)
|
|
mul.Mod(mul, z)
|
|
stack.push(U256(mul))
|
|
} else {
|
|
stack.push(new(big.Int))
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func opSha3(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
offset, size := stack.pop(), stack.pop()
|
|
hash := crypto.Keccak256(memory.Get(offset.Int64(), size.Int64()))
|
|
|
|
stack.push(common.BytesToBig(hash))
|
|
return nil, nil
|
|
}
|
|
|
|
func opAddress(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.push(common.Bytes2Big(contract.Address().Bytes()))
|
|
return nil, nil
|
|
}
|
|
|
|
func opBalance(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
addr := common.BigToAddress(stack.pop())
|
|
balance := env.StateDB.GetBalance(addr)
|
|
|
|
stack.push(new(big.Int).Set(balance))
|
|
return nil, nil
|
|
}
|
|
|
|
func opOrigin(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.push(env.Origin.Big())
|
|
return nil, nil
|
|
}
|
|
|
|
func opCaller(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.push(contract.Caller().Big())
|
|
return nil, nil
|
|
}
|
|
|
|
func opCallValue(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.push(new(big.Int).Set(contract.value))
|
|
return nil, nil
|
|
}
|
|
|
|
func opCalldataLoad(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.push(common.Bytes2Big(getData(contract.Input, stack.pop(), common.Big32)))
|
|
return nil, nil
|
|
}
|
|
|
|
func opCalldataSize(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.push(big.NewInt(int64(len(contract.Input))))
|
|
return nil, nil
|
|
}
|
|
|
|
func opCalldataCopy(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
var (
|
|
mOff = stack.pop()
|
|
cOff = stack.pop()
|
|
l = stack.pop()
|
|
)
|
|
memory.Set(mOff.Uint64(), l.Uint64(), getData(contract.Input, cOff, l))
|
|
return nil, nil
|
|
}
|
|
|
|
func opExtCodeSize(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
addr := common.BigToAddress(stack.pop())
|
|
l := big.NewInt(int64(env.StateDB.GetCodeSize(addr)))
|
|
stack.push(l)
|
|
return nil, nil
|
|
}
|
|
|
|
func opCodeSize(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
l := big.NewInt(int64(len(contract.Code)))
|
|
stack.push(l)
|
|
return nil, nil
|
|
}
|
|
|
|
func opCodeCopy(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
var (
|
|
mOff = stack.pop()
|
|
cOff = stack.pop()
|
|
l = stack.pop()
|
|
)
|
|
codeCopy := getData(contract.Code, cOff, l)
|
|
|
|
memory.Set(mOff.Uint64(), l.Uint64(), codeCopy)
|
|
return nil, nil
|
|
}
|
|
|
|
func opExtCodeCopy(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
var (
|
|
addr = common.BigToAddress(stack.pop())
|
|
mOff = stack.pop()
|
|
cOff = stack.pop()
|
|
l = stack.pop()
|
|
)
|
|
codeCopy := getData(env.StateDB.GetCode(addr), cOff, l)
|
|
|
|
memory.Set(mOff.Uint64(), l.Uint64(), codeCopy)
|
|
return nil, nil
|
|
}
|
|
|
|
func opGasprice(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.push(new(big.Int).Set(env.GasPrice))
|
|
return nil, nil
|
|
}
|
|
|
|
func opBlockhash(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
num := stack.pop()
|
|
|
|
n := new(big.Int).Sub(env.BlockNumber, common.Big257)
|
|
if num.Cmp(n) > 0 && num.Cmp(env.BlockNumber) < 0 {
|
|
stack.push(env.GetHash(num.Uint64()).Big())
|
|
} else {
|
|
stack.push(new(big.Int))
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func opCoinbase(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.push(env.Coinbase.Big())
|
|
return nil, nil
|
|
}
|
|
|
|
func opTimestamp(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.push(U256(new(big.Int).Set(env.Time)))
|
|
return nil, nil
|
|
}
|
|
|
|
func opNumber(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.push(U256(new(big.Int).Set(env.BlockNumber)))
|
|
return nil, nil
|
|
}
|
|
|
|
func opDifficulty(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.push(U256(new(big.Int).Set(env.Difficulty)))
|
|
return nil, nil
|
|
}
|
|
|
|
func opGasLimit(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.push(U256(new(big.Int).Set(env.GasLimit)))
|
|
return nil, nil
|
|
}
|
|
|
|
func opPop(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.pop()
|
|
return nil, nil
|
|
}
|
|
|
|
func opMload(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
offset := stack.pop()
|
|
val := common.BigD(memory.Get(offset.Int64(), 32))
|
|
stack.push(val)
|
|
return nil, nil
|
|
}
|
|
|
|
func opMstore(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
// pop value of the stack
|
|
mStart, val := stack.pop(), stack.pop()
|
|
memory.Set(mStart.Uint64(), 32, common.BigToBytes(val, 256))
|
|
return nil, nil
|
|
}
|
|
|
|
func opMstore8(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
off, val := stack.pop().Int64(), stack.pop().Int64()
|
|
memory.store[off] = byte(val & 0xff)
|
|
return nil, nil
|
|
}
|
|
|
|
func opSload(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
loc := common.BigToHash(stack.pop())
|
|
val := env.StateDB.GetState(contract.Address(), loc).Big()
|
|
stack.push(val)
|
|
return nil, nil
|
|
}
|
|
|
|
func opSstore(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
loc := common.BigToHash(stack.pop())
|
|
val := stack.pop()
|
|
env.StateDB.SetState(contract.Address(), loc, common.BigToHash(val))
|
|
return nil, nil
|
|
}
|
|
|
|
func opJump(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
pos := stack.pop()
|
|
if !contract.jumpdests.has(contract.CodeHash, contract.Code, pos) {
|
|
nop := contract.GetOp(pos.Uint64())
|
|
return nil, fmt.Errorf("invalid jump destination (%v) %v", nop, pos)
|
|
}
|
|
*pc = pos.Uint64()
|
|
return nil, nil
|
|
}
|
|
func opJumpi(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
pos, cond := stack.pop(), stack.pop()
|
|
if cond.Cmp(common.BigTrue) >= 0 {
|
|
if !contract.jumpdests.has(contract.CodeHash, contract.Code, pos) {
|
|
nop := contract.GetOp(pos.Uint64())
|
|
return nil, fmt.Errorf("invalid jump destination (%v) %v", nop, pos)
|
|
}
|
|
*pc = pos.Uint64()
|
|
} else {
|
|
*pc++
|
|
}
|
|
return nil, nil
|
|
}
|
|
func opJumpdest(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
return nil, nil
|
|
}
|
|
|
|
func opPc(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.push(new(big.Int).SetUint64(*pc))
|
|
return nil, nil
|
|
}
|
|
|
|
func opMsize(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.push(big.NewInt(int64(memory.Len())))
|
|
return nil, nil
|
|
}
|
|
|
|
func opGas(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.push(new(big.Int).Set(contract.Gas))
|
|
return nil, nil
|
|
}
|
|
|
|
func opCreate(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
var (
|
|
value = stack.pop()
|
|
offset, size = stack.pop(), stack.pop()
|
|
input = memory.Get(offset.Int64(), size.Int64())
|
|
gas = new(big.Int).Set(contract.Gas)
|
|
)
|
|
if env.ChainConfig().IsEIP150(env.BlockNumber) {
|
|
gas.Div(gas, n64)
|
|
gas = gas.Sub(contract.Gas, gas)
|
|
}
|
|
|
|
contract.UseGas(gas)
|
|
_, addr, suberr := env.Create(contract, input, gas, value)
|
|
// Push item on the stack based on the returned error. If the ruleset is
|
|
// homestead we must check for CodeStoreOutOfGasError (homestead only
|
|
// rule) and treat as an error, if the ruleset is frontier we must
|
|
// ignore this error and pretend the operation was successful.
|
|
if env.ChainConfig().IsHomestead(env.BlockNumber) && suberr == ErrCodeStoreOutOfGas {
|
|
stack.push(new(big.Int))
|
|
} else if suberr != nil && suberr != ErrCodeStoreOutOfGas {
|
|
stack.push(new(big.Int))
|
|
} else {
|
|
stack.push(addr.Big())
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func opCall(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
gas := stack.pop()
|
|
// pop gas and value of the stack.
|
|
addr, value := stack.pop(), stack.pop()
|
|
value = U256(value)
|
|
// pop input size and offset
|
|
inOffset, inSize := stack.pop(), stack.pop()
|
|
// pop return size and offset
|
|
retOffset, retSize := stack.pop(), stack.pop()
|
|
|
|
address := common.BigToAddress(addr)
|
|
|
|
// Get the arguments from the memory
|
|
args := memory.Get(inOffset.Int64(), inSize.Int64())
|
|
|
|
if len(value.Bytes()) > 0 {
|
|
gas.Add(gas, params.CallStipend)
|
|
}
|
|
|
|
ret, err := env.Call(contract, address, args, gas, value)
|
|
|
|
if err != nil {
|
|
stack.push(new(big.Int))
|
|
|
|
} else {
|
|
stack.push(big.NewInt(1))
|
|
|
|
memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func opCallCode(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
gas := stack.pop()
|
|
// pop gas and value of the stack.
|
|
addr, value := stack.pop(), stack.pop()
|
|
value = U256(value)
|
|
// pop input size and offset
|
|
inOffset, inSize := stack.pop(), stack.pop()
|
|
// pop return size and offset
|
|
retOffset, retSize := stack.pop(), stack.pop()
|
|
|
|
address := common.BigToAddress(addr)
|
|
|
|
// Get the arguments from the memory
|
|
args := memory.Get(inOffset.Int64(), inSize.Int64())
|
|
|
|
if len(value.Bytes()) > 0 {
|
|
gas.Add(gas, params.CallStipend)
|
|
}
|
|
|
|
ret, err := env.CallCode(contract, address, args, gas, value)
|
|
|
|
if err != nil {
|
|
stack.push(new(big.Int))
|
|
|
|
} else {
|
|
stack.push(big.NewInt(1))
|
|
|
|
memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func opDelegateCall(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
// if not homestead return an error. DELEGATECALL is not supported
|
|
// during pre-homestead.
|
|
if !env.ChainConfig().IsHomestead(env.BlockNumber) {
|
|
return nil, fmt.Errorf("invalid opcode %x", DELEGATECALL)
|
|
}
|
|
|
|
gas, to, inOffset, inSize, outOffset, outSize := stack.pop(), stack.pop(), stack.pop(), stack.pop(), stack.pop(), stack.pop()
|
|
|
|
toAddr := common.BigToAddress(to)
|
|
args := memory.Get(inOffset.Int64(), inSize.Int64())
|
|
ret, err := env.DelegateCall(contract, toAddr, args, gas)
|
|
if err != nil {
|
|
stack.push(new(big.Int))
|
|
} else {
|
|
stack.push(big.NewInt(1))
|
|
memory.Set(outOffset.Uint64(), outSize.Uint64(), ret)
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func opReturn(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
offset, size := stack.pop(), stack.pop()
|
|
ret := memory.GetPtr(offset.Int64(), size.Int64())
|
|
|
|
return ret, nil
|
|
}
|
|
|
|
func opStop(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
return nil, nil
|
|
}
|
|
|
|
func opSuicide(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
balance := env.StateDB.GetBalance(contract.Address())
|
|
env.StateDB.AddBalance(common.BigToAddress(stack.pop()), balance)
|
|
|
|
env.StateDB.Suicide(contract.Address())
|
|
|
|
return nil, nil
|
|
}
|
|
|
|
// following functions are used by the instruction jump table
|
|
|
|
// make log instruction function
|
|
func makeLog(size int) executionFunc {
|
|
return func(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
topics := make([]common.Hash, size)
|
|
mStart, mSize := stack.pop(), stack.pop()
|
|
for i := 0; i < size; i++ {
|
|
topics[i] = common.BigToHash(stack.pop())
|
|
}
|
|
|
|
d := memory.Get(mStart.Int64(), mSize.Int64())
|
|
log := NewLog(contract.Address(), topics, d, env.BlockNumber.Uint64())
|
|
env.StateDB.AddLog(log)
|
|
return nil, nil
|
|
}
|
|
}
|
|
|
|
// make push instruction function
|
|
func makePush(size uint64, bsize *big.Int) executionFunc {
|
|
return func(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
byts := getData(contract.Code, new(big.Int).SetUint64(*pc+1), bsize)
|
|
stack.push(common.Bytes2Big(byts))
|
|
*pc += size
|
|
return nil, nil
|
|
}
|
|
}
|
|
|
|
// make push instruction function
|
|
func makeDup(size int64) executionFunc {
|
|
return func(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.dup(int(size))
|
|
return nil, nil
|
|
}
|
|
}
|
|
|
|
// make swap instruction function
|
|
func makeSwap(size int64) executionFunc {
|
|
// switch n + 1 otherwise n would be swapped with n
|
|
size += 1
|
|
return func(pc *uint64, env *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
|
|
stack.swap(int(size))
|
|
return nil, nil
|
|
}
|
|
}
|