github.com/sberex/go-sberex@v1.8.2-0.20181113200658-ed96ac38f7d7/cmd/evm/disasm.go (about)

     1  // This file is part of the go-sberex library. The go-sberex library is 
     2  // free software: you can redistribute it and/or modify it under the terms 
     3  // of the GNU Lesser General Public License as published by the Free 
     4  // Software Foundation, either version 3 of the License, or (at your option)
     5  // any later version.
     6  //
     7  // The go-sberex library is distributed in the hope that it will be useful, 
     8  // but WITHOUT ANY WARRANTY; without even the implied warranty of
     9  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser 
    10  // General Public License <http://www.gnu.org/licenses/> for more details.
    11  
    12  package main
    13  
    14  import (
    15  	"errors"
    16  	"fmt"
    17  	"io/ioutil"
    18  	"strings"
    19  
    20  	"github.com/Sberex/go-sberex/core/asm"
    21  	cli "gopkg.in/urfave/cli.v1"
    22  )
    23  
    24  var disasmCommand = cli.Command{
    25  	Action:    disasmCmd,
    26  	Name:      "disasm",
    27  	Usage:     "disassembles evm binary",
    28  	ArgsUsage: "<file>",
    29  }
    30  
    31  func disasmCmd(ctx *cli.Context) error {
    32  	if len(ctx.Args().First()) == 0 {
    33  		return errors.New("filename required")
    34  	}
    35  
    36  	fn := ctx.Args().First()
    37  	in, err := ioutil.ReadFile(fn)
    38  	if err != nil {
    39  		return err
    40  	}
    41  
    42  	code := strings.TrimSpace(string(in[:]))
    43  	fmt.Printf("%v\n", code)
    44  	return asm.PrintDisassembled(code)
    45  }