3fc7c97827
Environment is now a struct (not an interface). This reduces a lot of tech-debt throughout the codebase where a virtual machine environment had to be implemented in order to test or run it. The new environment is suitable to be used en the json tests, core consensus and light client.
667 lines
21 KiB
Go
667 lines
21 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package vm
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import (
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"fmt"
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"math/big"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/math"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/params"
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)
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type programInstruction interface {
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// executes the program instruction and allows the instruction to modify the state of the program
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do(program *Program, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) ([]byte, error)
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// returns whether the program instruction halts the execution of the JIT
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halts() bool
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// Returns the current op code (debugging purposes)
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Op() OpCode
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}
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type instrFn func(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack)
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type instruction struct {
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op OpCode
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pc uint64
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fn instrFn
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data *big.Int
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gas *big.Int
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spop int
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spush int
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returns bool
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}
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func jump(mapping map[uint64]uint64, destinations map[uint64]struct{}, contract *Contract, to *big.Int) (uint64, error) {
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if !validDest(destinations, to) {
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nop := contract.GetOp(to.Uint64())
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return 0, fmt.Errorf("invalid jump destination (%v) %v", nop, to)
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}
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return mapping[to.Uint64()], nil
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}
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func (instr instruction) do(program *Program, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
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// calculate the new memory size and gas price for the current executing opcode
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newMemSize, cost, err := jitCalculateGasAndSize(env, contract, instr, memory, stack)
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if err != nil {
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return nil, err
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}
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// Use the calculated gas. When insufficient gas is present, use all gas and return an
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// Out Of Gas error
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if !contract.UseGas(cost) {
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return nil, OutOfGasError
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}
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// Resize the memory calculated previously
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memory.Resize(newMemSize.Uint64())
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// These opcodes return an argument and are therefor handled
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// differently from the rest of the opcodes
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switch instr.op {
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case JUMP:
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if pos, err := jump(program.mapping, program.destinations, contract, stack.pop()); err != nil {
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return nil, err
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} else {
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*pc = pos
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return nil, nil
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}
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case JUMPI:
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pos, cond := stack.pop(), stack.pop()
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if cond.Cmp(common.BigTrue) >= 0 {
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if pos, err := jump(program.mapping, program.destinations, contract, pos); err != nil {
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return nil, err
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} else {
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*pc = pos
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return nil, nil
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}
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}
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case RETURN:
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offset, size := stack.pop(), stack.pop()
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return memory.GetPtr(offset.Int64(), size.Int64()), nil
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default:
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if instr.fn == nil {
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return nil, fmt.Errorf("Invalid opcode 0x%x", instr.op)
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}
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instr.fn(instr, pc, env, contract, memory, stack)
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}
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*pc++
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return nil, nil
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}
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func (instr instruction) halts() bool {
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return instr.returns
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}
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func (instr instruction) Op() OpCode {
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return instr.op
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}
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func opStaticJump(instr instruction, pc *uint64, ret *big.Int, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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ret.Set(instr.data)
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}
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func opAdd(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x, y := stack.pop(), stack.pop()
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stack.push(U256(x.Add(x, y)))
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}
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func opSub(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x, y := stack.pop(), stack.pop()
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stack.push(U256(x.Sub(x, y)))
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}
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func opMul(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x, y := stack.pop(), stack.pop()
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stack.push(U256(x.Mul(x, y)))
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}
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func opDiv(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x, y := stack.pop(), stack.pop()
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if y.Cmp(common.Big0) != 0 {
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stack.push(U256(x.Div(x, y)))
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} else {
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stack.push(new(big.Int))
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}
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}
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func opSdiv(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x, y := S256(stack.pop()), S256(stack.pop())
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if y.Cmp(common.Big0) == 0 {
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stack.push(new(big.Int))
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return
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} else {
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n := new(big.Int)
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if new(big.Int).Mul(x, y).Cmp(common.Big0) < 0 {
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n.SetInt64(-1)
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} else {
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n.SetInt64(1)
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}
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res := x.Div(x.Abs(x), y.Abs(y))
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res.Mul(res, n)
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stack.push(U256(res))
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}
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}
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func opMod(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x, y := stack.pop(), stack.pop()
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if y.Cmp(common.Big0) == 0 {
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stack.push(new(big.Int))
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} else {
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stack.push(U256(x.Mod(x, y)))
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}
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}
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func opSmod(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x, y := S256(stack.pop()), S256(stack.pop())
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if y.Cmp(common.Big0) == 0 {
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stack.push(new(big.Int))
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} else {
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n := new(big.Int)
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if x.Cmp(common.Big0) < 0 {
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n.SetInt64(-1)
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} else {
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n.SetInt64(1)
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}
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res := x.Mod(x.Abs(x), y.Abs(y))
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res.Mul(res, n)
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stack.push(U256(res))
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}
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}
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func opExp(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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base, exponent := stack.pop(), stack.pop()
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stack.push(math.Exp(base, exponent))
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}
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func opSignExtend(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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back := stack.pop()
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if back.Cmp(big.NewInt(31)) < 0 {
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bit := uint(back.Uint64()*8 + 7)
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num := stack.pop()
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mask := back.Lsh(common.Big1, bit)
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mask.Sub(mask, common.Big1)
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if common.BitTest(num, int(bit)) {
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num.Or(num, mask.Not(mask))
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} else {
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num.And(num, mask)
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}
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stack.push(U256(num))
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}
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}
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func opNot(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x := stack.pop()
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stack.push(U256(x.Not(x)))
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}
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func opLt(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x, y := stack.pop(), stack.pop()
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if x.Cmp(y) < 0 {
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stack.push(big.NewInt(1))
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} else {
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stack.push(new(big.Int))
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}
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}
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func opGt(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x, y := stack.pop(), stack.pop()
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if x.Cmp(y) > 0 {
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stack.push(big.NewInt(1))
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} else {
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stack.push(new(big.Int))
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}
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}
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func opSlt(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x, y := S256(stack.pop()), S256(stack.pop())
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if x.Cmp(S256(y)) < 0 {
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stack.push(big.NewInt(1))
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} else {
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stack.push(new(big.Int))
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}
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}
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func opSgt(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x, y := S256(stack.pop()), S256(stack.pop())
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if x.Cmp(y) > 0 {
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stack.push(big.NewInt(1))
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} else {
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stack.push(new(big.Int))
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}
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}
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func opEq(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x, y := stack.pop(), stack.pop()
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if x.Cmp(y) == 0 {
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stack.push(big.NewInt(1))
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} else {
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stack.push(new(big.Int))
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}
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}
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func opIszero(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x := stack.pop()
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if x.Cmp(common.Big0) > 0 {
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stack.push(new(big.Int))
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} else {
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stack.push(big.NewInt(1))
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}
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}
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func opAnd(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x, y := stack.pop(), stack.pop()
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stack.push(x.And(x, y))
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}
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func opOr(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x, y := stack.pop(), stack.pop()
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stack.push(x.Or(x, y))
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}
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func opXor(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x, y := stack.pop(), stack.pop()
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stack.push(x.Xor(x, y))
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}
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func opByte(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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th, val := stack.pop(), stack.pop()
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if th.Cmp(big.NewInt(32)) < 0 {
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byte := big.NewInt(int64(common.LeftPadBytes(val.Bytes(), 32)[th.Int64()]))
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stack.push(byte)
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} else {
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stack.push(new(big.Int))
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}
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}
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func opAddmod(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x, y, z := stack.pop(), stack.pop(), stack.pop()
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if z.Cmp(Zero) > 0 {
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add := x.Add(x, y)
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add.Mod(add, z)
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stack.push(U256(add))
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} else {
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stack.push(new(big.Int))
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}
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}
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func opMulmod(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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x, y, z := stack.pop(), stack.pop(), stack.pop()
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if z.Cmp(Zero) > 0 {
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mul := x.Mul(x, y)
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mul.Mod(mul, z)
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stack.push(U256(mul))
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} else {
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stack.push(new(big.Int))
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}
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}
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func opSha3(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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offset, size := stack.pop(), stack.pop()
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hash := crypto.Keccak256(memory.Get(offset.Int64(), size.Int64()))
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stack.push(common.BytesToBig(hash))
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}
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func opAddress(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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stack.push(common.Bytes2Big(contract.Address().Bytes()))
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}
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func opBalance(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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addr := common.BigToAddress(stack.pop())
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balance := env.StateDB.GetBalance(addr)
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stack.push(new(big.Int).Set(balance))
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}
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func opOrigin(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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stack.push(env.Origin.Big())
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}
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func opCaller(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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stack.push(contract.Caller().Big())
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}
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func opCallValue(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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stack.push(new(big.Int).Set(contract.value))
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}
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func opCalldataLoad(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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stack.push(common.Bytes2Big(getData(contract.Input, stack.pop(), common.Big32)))
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}
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func opCalldataSize(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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stack.push(big.NewInt(int64(len(contract.Input))))
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}
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func opCalldataCopy(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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var (
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mOff = stack.pop()
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cOff = stack.pop()
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l = stack.pop()
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)
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memory.Set(mOff.Uint64(), l.Uint64(), getData(contract.Input, cOff, l))
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}
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func opExtCodeSize(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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addr := common.BigToAddress(stack.pop())
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l := big.NewInt(int64(env.StateDB.GetCodeSize(addr)))
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stack.push(l)
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}
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func opCodeSize(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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l := big.NewInt(int64(len(contract.Code)))
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stack.push(l)
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}
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func opCodeCopy(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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var (
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mOff = stack.pop()
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cOff = stack.pop()
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l = stack.pop()
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)
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codeCopy := getData(contract.Code, cOff, l)
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memory.Set(mOff.Uint64(), l.Uint64(), codeCopy)
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}
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func opExtCodeCopy(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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var (
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addr = common.BigToAddress(stack.pop())
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mOff = stack.pop()
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cOff = stack.pop()
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l = stack.pop()
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)
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codeCopy := getData(env.StateDB.GetCode(addr), cOff, l)
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memory.Set(mOff.Uint64(), l.Uint64(), codeCopy)
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}
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func opGasprice(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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stack.push(new(big.Int).Set(env.GasPrice))
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}
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func opBlockhash(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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num := stack.pop()
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n := new(big.Int).Sub(env.BlockNumber, common.Big257)
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if num.Cmp(n) > 0 && num.Cmp(env.BlockNumber) < 0 {
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stack.push(env.GetHash(num.Uint64()).Big())
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} else {
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stack.push(new(big.Int))
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}
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}
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func opCoinbase(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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stack.push(env.Coinbase.Big())
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}
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func opTimestamp(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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stack.push(U256(new(big.Int).Set(env.Time)))
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}
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func opNumber(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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stack.push(U256(new(big.Int).Set(env.BlockNumber)))
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}
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func opDifficulty(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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stack.push(U256(new(big.Int).Set(env.Difficulty)))
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}
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func opGasLimit(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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stack.push(U256(new(big.Int).Set(env.GasLimit)))
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}
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func opPop(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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stack.pop()
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}
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func opPush(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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stack.push(new(big.Int).Set(instr.data))
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}
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func opDup(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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stack.dup(int(instr.data.Int64()))
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}
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func opSwap(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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stack.swap(int(instr.data.Int64()))
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}
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func opLog(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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n := int(instr.data.Int64())
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topics := make([]common.Hash, n)
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mStart, mSize := stack.pop(), stack.pop()
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for i := 0; i < n; i++ {
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topics[i] = common.BigToHash(stack.pop())
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}
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d := memory.Get(mStart.Int64(), mSize.Int64())
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log := NewLog(contract.Address(), topics, d, env.BlockNumber.Uint64())
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env.StateDB.AddLog(log)
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}
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func opMload(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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offset := stack.pop()
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val := common.BigD(memory.Get(offset.Int64(), 32))
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stack.push(val)
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}
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func opMstore(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
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// pop value of the stack
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mStart, val := stack.pop(), stack.pop()
|
|
memory.Set(mStart.Uint64(), 32, common.BigToBytes(val, 256))
|
|
}
|
|
|
|
func opMstore8(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
off, val := stack.pop().Int64(), stack.pop().Int64()
|
|
memory.store[off] = byte(val & 0xff)
|
|
}
|
|
|
|
func opSload(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
loc := common.BigToHash(stack.pop())
|
|
val := env.StateDB.GetState(contract.Address(), loc).Big()
|
|
stack.push(val)
|
|
}
|
|
|
|
func opSstore(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
loc := common.BigToHash(stack.pop())
|
|
val := stack.pop()
|
|
env.StateDB.SetState(contract.Address(), loc, common.BigToHash(val))
|
|
}
|
|
|
|
func opJump(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
}
|
|
func opJumpi(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
}
|
|
func opJumpdest(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
}
|
|
|
|
func opPc(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
stack.push(new(big.Int).Set(instr.data))
|
|
}
|
|
|
|
func opMsize(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
stack.push(big.NewInt(int64(memory.Len())))
|
|
}
|
|
|
|
func opGas(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
stack.push(new(big.Int).Set(contract.Gas))
|
|
}
|
|
|
|
func opCreate(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
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 == CodeStoreOutOfGasError {
|
|
stack.push(new(big.Int))
|
|
} else if suberr != nil && suberr != CodeStoreOutOfGasError {
|
|
stack.push(new(big.Int))
|
|
} else {
|
|
stack.push(addr.Big())
|
|
}
|
|
}
|
|
|
|
func opCall(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
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)
|
|
}
|
|
}
|
|
|
|
func opCallCode(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
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)
|
|
}
|
|
}
|
|
|
|
func opDelegateCall(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
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)
|
|
}
|
|
}
|
|
|
|
func opReturn(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
}
|
|
func opStop(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
}
|
|
|
|
func opSuicide(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
balance := env.StateDB.GetBalance(contract.Address())
|
|
env.StateDB.AddBalance(common.BigToAddress(stack.pop()), balance)
|
|
|
|
env.StateDB.Suicide(contract.Address())
|
|
}
|
|
|
|
// following functions are used by the instruction jump table
|
|
|
|
// make log instruction function
|
|
func makeLog(size int) instrFn {
|
|
return func(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
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)
|
|
}
|
|
}
|
|
|
|
// make push instruction function
|
|
func makePush(size uint64, bsize *big.Int) instrFn {
|
|
return func(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
byts := getData(contract.Code, new(big.Int).SetUint64(*pc+1), bsize)
|
|
stack.push(common.Bytes2Big(byts))
|
|
*pc += size
|
|
}
|
|
}
|
|
|
|
// make push instruction function
|
|
func makeDup(size int64) instrFn {
|
|
return func(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
stack.dup(int(size))
|
|
}
|
|
}
|
|
|
|
// make swap instruction function
|
|
func makeSwap(size int64) instrFn {
|
|
// switch n + 1 otherwise n would be swapped with n
|
|
size += 1
|
|
return func(instr instruction, pc *uint64, env *Environment, contract *Contract, memory *Memory, stack *Stack) {
|
|
stack.swap(int(size))
|
|
}
|
|
}
|