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core, core/vm, cmd/disasm: unify procedures for disassembling evm code (#3530)

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This commit is contained in:
Valentin Wüstholz
2017-02-27 12:21:19 +01:00
committed by Felix Lange
parent 5c8fe28b72
commit 37511ec520
6 changed files with 218 additions and 185 deletions
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28
cmd/disasm/main.go
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@ -18,43 +18,25 @@
package main
import (
"encoding/hex"
"fmt"
"io/ioutil"
"os"
"strings"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/core/asm"
)
func main() {
code, err := ioutil.ReadAll(os.Stdin)
in, err := ioutil.ReadAll(os.Stdin)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
code, err = hex.DecodeString(strings.TrimSpace(string(code[:])))
code := strings.TrimSpace(string(in[:]))
fmt.Printf("%v\n", code)
err = asm.PrintDisassembled(code)
if err != nil {
fmt.Printf("Error: %v\n", err)
return
}
fmt.Printf("%x\n", code)
for pc := uint64(0); pc < uint64(len(code)); pc++ {
op := vm.OpCode(code[pc])
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
u := pc + 1 + a
if uint64(len(code)) <= pc || uint64(len(code)) < u {
fmt.Printf("Error: incomplete push instruction at %v\n", pc)
return
}
fmt.Printf("%-5d %v => %x\n", pc, op, code[pc+1:u])
pc += a
default:
fmt.Printf("%-5d %v\n", pc, op)
}
}
}