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30 lines
756 B
Rust
30 lines
756 B
Rust
#![feature(lang_items)]
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#![feature(const_fn)]
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#![no_std]
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extern crate rlibc;
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mod vga_buffer;
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#[no_mangle]
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pub extern fn rust_main() {
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// ATTENTION: we have a very small stack and no guard page
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let hello = b"Hello World!";
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let color_byte = 0x1f; // white foreground, blue background
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let mut hello_colored = [color_byte; 24];
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for (i, char_byte) in hello.into_iter().enumerate() {
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hello_colored[i*2] = *char_byte;
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}
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// write `Hello World!` to the center of the VGA text buffer
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let buffer_ptr = (0xb8000 + 1988) as *mut _;
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unsafe { *buffer_ptr = hello_colored };
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loop{}
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}
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#[lang = "eh_personality"] extern fn eh_personality() {}
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#[lang = "panic_fmt"] #[no_mangle] pub extern fn panic_fmt() -> ! {loop{}}
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