.section .text
.global _start
.lcomm buffer, 500
_start:
        mov r0, $0      // stdin
        ldr r1, =buffer     // pointer to memory
        mov r2, $500        // 500 bytes
        mov r7, $3      // sys_read signal
        swi $0

        mov r0, $1      // stdout
        mov r7, $4      // sys_write signal
        swi $0

        mov r7, $1      // exit signal
        swi $0