Official Go implementation of the Ethereum protocol
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go-ethereum/cmd/evm/disasm.go

56 lines
1.4 KiB

// Copyright 2017 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"errors"
"fmt"
"io/ioutil"
"strings"
"github.com/ethereum/go-ethereum/core/asm"
"gopkg.in/urfave/cli.v1"
)
var disasmCommand = cli.Command{
Action: disasmCmd,
Name: "disasm",
Usage: "disassembles evm binary",
ArgsUsage: "<file>",
}
func disasmCmd(ctx *cli.Context) error {
var in string
switch {
case len(ctx.Args().First()) > 0:
fn := ctx.Args().First()
input, err := ioutil.ReadFile(fn)
if err != nil {
return err
}
in = string(input)
case ctx.GlobalIsSet(InputFlag.Name):
in = ctx.GlobalString(InputFlag.Name)
default:
return errors.New("missing filename or --input value")
}
code := strings.TrimSpace(in)
fmt.Printf("%v\n", code)
return asm.PrintDisassembled(code)
}