mirror of https://github.com/status-im/op-geth.git
46 lines
1.0 KiB
Go
46 lines
1.0 KiB
Go
package chain
|
|
|
|
import (
|
|
"fmt"
|
|
"math/big"
|
|
|
|
"github.com/ethereum/go-ethereum/ethutil"
|
|
)
|
|
|
|
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
|
|
}
|