用汇编生成shellcode

# -*- coding:utf-8 -*-
import os
import base64
from pwn import*
asm_code = """.global _start
_start:
        jmp     test1
test2:
        pop     ebx
        mov     al, 0xa
        int     0x80
        mov     al, 0x1
        xor     ebx, ebx
        int     0x80
test1:
        call    test2
        .string "delfile" """
 
shellcode=asm(asm_code).encode('hex')
flag=""
for i in range(0,len(shellcode),2):
    flag+=r'\x'
    flag+=shellcode[i]+shellcode[i+1]
print flag