也许这样的事情，但从来没有使用它严重code！

maybe something like this, but never use it in serious code!

format ELF64 executable
use64
entry start

segment executable  writeable
  start:
  ;<some code>
  mov al, 0x7f
  inc al
  ;<or some other math>
  mov byte [ here + 1 ], al
  here:
  int 0x20
segment readable  writeable

（这是fasm- code）

(this is fasm-code)