29 lines
706 B
Rust
29 lines
706 B
Rust
#![feature(panic_implementation)] // required to define panic handler
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#![no_std] // don't include rust std lib
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#![no_main] // disable all rust entry point
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use core::panic::PanicInfo;
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/// This function is called on panic.
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#[panic_implementation]
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#[no_mangle]
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pub fn panic(_info: &PanicInfo) -> ! {
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loop {}
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}
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static HELLO: &[u8] = b"Hello World!";
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#[no_mangle] // don't change the name of function in symbol table
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pub extern "C" fn _start() -> ! {
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let vga_buffer = 0xb8000 as *mut u8;
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for (i, &byte) in HELLO.iter().enumerate() {
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unsafe {
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*vga_buffer.offset(i as isize * 2) = byte;
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*vga_buffer.offset(i as isize * 2 + 1) = 0xb;
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}
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}
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loop {}
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}
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