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#![no_std]
mod display;
mod logger;
pub mod prelude;
use core::panic::PanicInfo;
use core::sync::atomic::{self, Ordering};
use display::Display;
use logger::Logger;
use mwatch_kernel::application::{Context, InputFn, ServiceFn, SetupFn, Table};
use mwatch_kernel::system::input::InputEvent;
#[link_section = ".entry_point"]
#[no_mangle]
pub static ENTRY_POINT: SetupFn = entry_point;
#[link_section = ".update_point"]
#[no_mangle]
pub static UPDATE_POINT: ServiceFn = update_point;
#[link_section = ".input_point"]
#[no_mangle]
pub static INPUT_POINT: InputFn = input_point;
extern "Rust" {
fn main() -> i32;
fn update(system: &mut UserSpace, display: &mut Display) -> i32;
fn input(system: &mut UserSpace, input: InputEvent) -> i32;
}
#[no_mangle]
pub unsafe extern "C" fn entry_point(table: *mut Table) -> i32 {
MWABI.set_table(table);
main()
}
#[no_mangle]
pub unsafe extern "C" fn update_point(raw_ctx: *mut Context) -> i32 {
MWABI.set_context(raw_ctx);
update(
&mut UserSpace {
logger: Logger::new(),
},
&mut Display::new(),
)
}
#[no_mangle]
pub unsafe extern "C" fn input_point(raw_ctx: *mut Context, state: InputEvent) -> i32 {
MWABI.set_context(raw_ctx);
input(
&mut UserSpace {
logger: Logger::new(),
},
state,
)
}
static mut MWABI: MWatchABI = MWatchABI {
context: core::ptr::null_mut(),
table: core::ptr::null_mut(),
};
pub(crate) struct MWatchABI {
context: *mut Context,
table: *mut Table,
}
impl MWatchABI {
pub(crate) fn context() -> &'static mut Context {
unsafe {
debug_assert!(!MWABI.context.is_null());
&mut *MWABI.context
}
}
pub(crate) fn table() -> &'static mut Table {
unsafe {
debug_assert!(!MWABI.table.is_null());
&mut *MWABI.table
}
}
pub(crate) fn set_context(&mut self, context: *mut Context) {
self.context = context;
}
pub(crate) fn set_table(&mut self, table: *mut Table) {
self.table = table;
}
}
#[repr(C)]
pub struct UserSpace {
pub logger: Logger,
}
#[cfg(not(any(feature = "panic-log", feature = "panic-simple")))]
#[inline(never)]
#[panic_handler]
fn panic(_info: &PanicInfo) -> ! {
loop {
atomic::compiler_fence(Ordering::SeqCst);
}
}
#[cfg(feature = "panic-log")]
#[inline(never)]
#[panic_handler]
fn panic(info: &PanicInfo) -> ! {
unsafe {
UserSpace {
logger: Logger::new(),
}
.logger
.log_fmt(format_args!("{:?}", info))
};
loop {
atomic::compiler_fence(Ordering::SeqCst);
}
}
#[cfg(feature = "panic-simple")]
#[inline(never)]
#[panic_handler]
fn panic(_info: &PanicInfo) -> ! {
UserSpace {
logger: Logger::new(),
}
.logger
.log_str("application panicked");
loop {
atomic::compiler_fence(Ordering::SeqCst);
}
}