.text # switch to program (code) space
.global _start # release the definition of _start to the linker
_start: # define a label for the beginning of this program
  movl $0xabcd1234, %eax
  movl %eax, %ebx
  
  # typical exit code follows
  movl $0x1, %eax # this tell the OS that we want to quit
  movl $0x0, %ebx # an exit code of 0 means normal termination
  int  $0x80      # request OS service