.lcomm  var1 4
.lcomm  var2 2

.global _start
_start:

   # load the address of "var1" into register %eax
   movl $var1,%eax  # eax = &var1
   movl $0x1234abcd,(%eax) # *eax = 0x1234abcd
   
   movl $var2,%ebx  # ebx = &var2
   movw $0xabcd,(%ebx) # *ebx = 0xabcd

   movl $0, %ebx
   movl $1, %eax
   int  $0x80