BITS 64

%define SYSCALL_CREATE_WINDOW 1
%define SYSCALL_DRAW_TEXT     2
%define SYSCALL_EXIT          3

section .text
global _start

_start:
    lea rbx, [rel win_title]
    mov rax, SYSCALL_CREATE_WINDOW
    mov rbx, 100
    mov rcx, 80
    mov r10, 300
    int 0x80

    mov r12, rax

    lea r10, [rel hello_text]
    mov rax, SYSCALL_DRAW_TEXT
    mov rbx, r12
    mov rcx, 20
    mov rdx, 30
    int 0x80

    mov rax, SYSCALL_EXIT
    xor rbx, rbx
    int 0x80

section .data
win_title: db "Hello World App", 0
hello_text: db "Hello World!", 0