/* Copyright (c) 2021 Jeremy Davis (jeremydavis519@gmail.com)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
 * and associated documentation files (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or
 * substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
 * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

//! This little program test's the kernel's ability to withstand an out-of-memory condition. It
//! spawns a whole lot of threads. The kernel's response should be to kill the most problematic
//! process, which will be this one.

#![no_std]
#![feature(asm)]

use core::panic::PanicInfo;

#[no_mangle]
fn _start() -> ! {
    loop {
        unsafe {
            asm!(
                "svc 0x0002", // spawn thread
                in("x2") _start,  // Entry point
                in("x3") 10,      // Priority
                in("x4") 0x12345, // Max stack size
                lateout("x0") _, // Thread ID
                options(nomem, preserves_flags, nostack)
            );
        }
    }
}

#[panic_handler]
fn panic_handler(_panic_info: &PanicInfo) -> ! {
    unsafe {
        asm!("svc 0xaaaa", options(nostack, noreturn));
    }
}
