.lcomm localbuf 1
.data
ch_to_output: .fill 128,1, 0   # this is a buffer
num_ch_to_output: .word 0 # this is a number
.text
.global _start
_start:

    # to output a linefeed character
    movb $10, ch_to_output
    movw $1, num_ch_to_output
    call sub1  # to print to the output file

    movb $32, ch_to_output
    movw $1, num_ch_to_output
    call sub1  # to print to the output file


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

sub1:
.lcomm localbuf 1
    movl $ch_to_output, %ecx     # using global var. ch_to_output for chars to
                                 # output
    movl $0, %edx
    movw num_ch_to_output, %dx   # using global var. num_ch_to_output for
                                 # number of characters to output
    movl $1, %ebx
    movl $4, %eax
    int  $0x80
    ret