global _main
extern _start

_main:
    xor rbp, rbp
    call _start

global _userspace
_userspace:
    mov rdi, 4000 ; 4000 ms / 4 seconds
    int 33h ; Sleep
    mov rdi, .message
    int 32h ; Print string
    mov rdi, 2000 ; 2000 ms / 2 seconds
    int 33h ; Sleep
    int 31h ; Exit current task
.message:
    db "hello from userspace!", 0xA, 0