diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/src/io/vga_text.rs | 23 | ||||
| -rw-r--r-- | kernel/src/lib.rs | 19 |
2 files changed, 32 insertions, 10 deletions
diff --git a/kernel/src/io/vga_text.rs b/kernel/src/io/vga_text.rs index fddb3e1..281a40a 100644 --- a/kernel/src/io/vga_text.rs +++ b/kernel/src/io/vga_text.rs @@ -23,6 +23,7 @@ pub const WIDTH: usize = 80; pub const HEIGHT: usize = 25; #[derive(Clone, Copy)] +#[repr(C)] pub struct CharState(pub u8); impl CharState { @@ -41,6 +42,7 @@ impl CharState { #[no_mangle] #[derive(Clone, Copy)] +#[repr(C)] pub struct VgaChar { pub byte: u8, pub state: CharState, @@ -56,6 +58,7 @@ pub struct OStream { pos: (usize, usize), cursor: *mut VgaChar, state: CharState, + centered_mode: bool } impl OStream { @@ -64,6 +67,7 @@ impl OStream { pos: (0, 0), cursor: Self::at(0), state: CharState::from_colors(Color::White, Color::Black), + centered_mode: false, } } @@ -120,6 +124,10 @@ impl OStream { } } + pub fn set_centered(&mut self, b: bool) { + self.centered_mode = b + } + pub fn new_line(&mut self) { if self.pos.1 >= HEIGHT - 1 { self.set_col(0); @@ -135,20 +143,29 @@ impl OStream { self.state = state } - pub fn print(&mut self, s: &[u8]) { + pub fn put_bytes(&mut self, s: &[u8]) { for &b in s { self.put_byte(b) } } + pub fn print(&mut self, s: &[u8]) { + if self.centered_mode { + self.print_centered(s) + } else { + self.put_bytes(s) + } + } + pub fn print_centered(&mut self, s: &[u8]) { let mut line = &s[..]; let mut n = 0; + if s.len() == 0 { return; } let slast = s.len() - 1; for (i, &b) in s.iter().enumerate() { if n >= WIDTH { self.set_col(0); - self.print(&line[..WIDTH]); + self.put_bytes(&line[..WIDTH]); line = &line[WIDTH..]; n = 0; } @@ -157,7 +174,7 @@ impl OStream { n += 1 } self.set_col(((WIDTH - n) / 2) as usize); - self.print(&line[..n]); + self.put_bytes(&line[..n]); self.new_line(); if i == slast { return; diff --git a/kernel/src/lib.rs b/kernel/src/lib.rs index b36d731..8ec68e5 100644 --- a/kernel/src/lib.rs +++ b/kernel/src/lib.rs @@ -2,6 +2,7 @@ #![feature(compiler_builtins_lib)] #![feature(custom_test_frameworks)] #![feature(abi_x86_interrupt)] +#![feature(panic_info_message)] #![test_runner(crate::test_runner)] #![reexport_test_harness_main = "test_main"] #![no_std] @@ -34,7 +35,7 @@ pub extern "C" fn _start() -> ! { let mut stdout = OStream::new(); stdout.clear(); - panic!("panic!"); + panic!("panic! at the disco"); core::iter::successors(Some(0), |n| Some(n + 1)) .for_each(|n| write!(&mut stdout, "hello world {}!", n).unwrap()); @@ -45,7 +46,7 @@ pub extern "C" fn _start() -> ! { #[panic_handler] #[no_mangle] -pub extern "C" fn panic_handler(_info: &core::panic::PanicInfo) -> ! { +pub extern "C" fn panic_handler(info: &core::panic::PanicInfo) -> ! { let mut stderr = OStream::new(); stderr.set_state(vga_text::CharState::from_colors( vga_text::Color::LightRed, @@ -60,15 +61,19 @@ pub extern "C" fn panic_handler(_info: &core::panic::PanicInfo) -> ! { )); stderr.print_centered(b"<kernel panic>"); stderr.set_row(14); - let text = _info - .payload() - .downcast_ref::<&str>() - .unwrap_or(&"no panic information is obtainable"); stderr.set_state(vga_text::CharState::from_colors( vga_text::Color::Cyan, vga_text::Color::Red, )); - stderr.print_centered(text.as_bytes()); + stderr.set_centered(true); + write!( + &mut stderr, + "{:?}", + info.message() + .unwrap_or(&format_args!("no panic information obtainable")) + ); + //loop{} + stderr.set_centered(false); if cfg!(test) { write!(serial::SerialStream::new(), "Testing failed\n").unwrap(); qemu::exit_qemu(qemu::QemuExitCode::Failed); |