AT&T Assembly for Linux and Mac (sys_exit)

int main(void)
{
return 99;
}

.section .data

.section .text

.globl _start

_start:

movl    $1,     %eax    #sys_call number
movl    $99,    %ebx    #_return value

int             $0x80           #intrrupt number

.globl _main

_main:

movl    $99,    %eax
ret