.data
    str1: .string "hello"
    str2: .string "world"
.text
.globl _start
_start:
    pushl $str1
    call puts
    call strcall
    call finish

strcall:
    pushl $str2
    call puts
    ret
finish:
    movl $1, %eax
    movl $0, %ebx
    int $0x80