45 lines
1.0 KiB
Go
45 lines
1.0 KiB
Go
package ethchain
|
|
|
|
import (
|
|
"fmt"
|
|
"github.com/ethereum/eth-go/ethutil"
|
|
"math/big"
|
|
)
|
|
|
|
func Disassemble(script []byte) (asm []string) {
|
|
pc := new(big.Int)
|
|
for {
|
|
if pc.Cmp(big.NewInt(int64(len(script)))) >= 0 {
|
|
return
|
|
}
|
|
|
|
// Get the memory location of pc
|
|
val := script[pc.Int64()]
|
|
// Get the opcode (it must be an opcode!)
|
|
op := OpCode(val)
|
|
|
|
asm = append(asm, fmt.Sprintf("%04v: %v", pc, op))
|
|
|
|
switch op {
|
|
case PUSH1, PUSH2, PUSH3, PUSH4, PUSH5, PUSH6, PUSH7, PUSH8, PUSH9, PUSH10, PUSH11, PUSH12, PUSH13, PUSH14, PUSH15, PUSH16, PUSH17, PUSH18, PUSH19, PUSH20, PUSH21, PUSH22, PUSH23, PUSH24, PUSH25, PUSH26, PUSH27, PUSH28, PUSH29, PUSH30, PUSH31, PUSH32:
|
|
pc.Add(pc, ethutil.Big1)
|
|
a := int64(op) - int64(PUSH1) + 1
|
|
if int(pc.Int64()+a) > len(script) {
|
|
return
|
|
}
|
|
|
|
data := script[pc.Int64() : pc.Int64()+a]
|
|
if len(data) == 0 {
|
|
data = []byte{0}
|
|
}
|
|
asm = append(asm, fmt.Sprintf("%04v: 0x%x", pc, data))
|
|
|
|
pc.Add(pc, big.NewInt(a-1))
|
|
}
|
|
|
|
pc.Add(pc, ethutil.Big1)
|
|
}
|
|
|
|
return asm
|
|
}
|