.lcomm var1 4 # allocate 4 bytes, assign the address of the first byte
              # to the symbolic name var1
.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
  nop
  movl $0xabcd1234, var1  # copy from immediate to direct memory
  
  # 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