path: root/cmd/disasm/main.go

package main

import (
    "fmt"
    "io/ioutil"
    "os"

    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/core/vm"
)

func main() {
    code, err := ioutil.ReadAll(os.Stdin)
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }
    code = common.Hex2Bytes(string(code[:len(code)-1]))
    fmt.Printf("%x\n", code)

    for pc := uint64(0); pc < uint64(len(code)); pc++ {
        op := vm.OpCode(code[pc])
        fmt.Printf("%-5d  %v", pc, op)

        switch op {
        case vm.PUSH1, vm.PUSH2, vm.PUSH3, vm.PUSH4, vm.PUSH5, vm.PUSH6, vm.PUSH7, vm.PUSH8, vm.PUSH9, vm.PUSH10, vm.PUSH11, vm.PUSH12, vm.PUSH13, vm.PUSH14, vm.PUSH15, vm.PUSH16, vm.PUSH17, vm.PUSH18, vm.PUSH19, vm.PUSH20, vm.PUSH21, vm.PUSH22, vm.PUSH23, vm.PUSH24, vm.PUSH25, vm.PUSH26, vm.PUSH27, vm.PUSH28, vm.PUSH29, vm.PUSH30, vm.PUSH31, vm.PUSH32:
            a := uint64(op) - uint64(vm.PUSH1) + 1
            fmt.Printf("  => %x", code[pc+1:pc+1+a])

            pc += a
        }
        fmt.Println()
    }
}