#![no_main]
#![feature(compiler_builtins_lib)]
#![feature(abi_x86_interrupt)]
#![feature(panic_info_message)]
#![no_std]

use core::fmt::Write;
use kernel;
use kernel::interrupts;
use kernel::interrupts::exception_handlers;
use kernel::io::qemu;

#[no_mangle]
extern "C" fn _start() -> ! {
    kernel::init();
    unsafe {
        exception_handlers::expect_fault(interrupts::InterruptType::PageFault);
    }
    _loop(0);
    panic!("PAGE_FAULT not caught");
    loop {}
}

fn _loop(i: u128) -> u128 {
    if i > 1u128 << 120 {
        return i;
    }
    let n = i;
    let mut stdout = kernel::OStream::new();
    write!(&mut stdout, "{:x}", &n as *const u128 as u128).unwrap();
    _loop(i + 1)
}

#[cfg(test)]
#[panic_handler]
#[no_mangle]
extern "C" fn panic_handler(info: &core::panic::PanicInfo) -> ! {
    kernel::testing::serial_panic(info);
    loop {}
}