Add modern (2022) version of inital code

.cargo/config

@@ -1,2 +1,7 @@
+[unstable]
+build-std = ["core", "compiler_builtins"]
+build-std-features = ["compiler-builtins-mem"]
+
 [build]
-target = "os.json"
+target = "x86_64_target.json"
+

Cargo.lock

@@ -0,0 +1,16 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "bootloader"
+version = "0.9.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a62c8f6168cd106687ee36a2b71a46c4144d73399f72814104d33094b8092fd2"
+
+[[package]]
+name = "rustos"
+version = "0.1.0"
+dependencies = [
+ "bootloader",
+]

Cargo.toml

@@ -2,17 +2,9 @@
 name = "rustos"
 version = "0.1.0"
 authors = ["greg <greg.shuflin@protonmail.com>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
-bootloader = { version = "0.6.4", features = ["map_physical_memory"] }
-volatile = "0.2.6"
-spin = "0.5.0"
-x86_64 = "0.7.2"
-pic8259_simple = "0.1.1"
-pc-keyboard = "0.5.0"
-
-[dependencies.lazy_static]
-version = "1.3.0"
-features = ["spin_no_std"]
+#bootloader = "0.10.12"
+bootloader = "0.9.8"
 

justfile

@@ -0,0 +1,7 @@
+default:
+    just --list
+
+run_os:
+    cargo bootimage
+    qemu-system-x86_64 -drive format=raw,file=target/x86_64_target/debug/bootimage-rustos.bin
+

run.sh

@@ -1,5 +0,0 @@
-#!/bin/sh
-
-cargo bootimage
-qemu-system-x86_64 -drive format=raw,file=target/os/debug/bootimage-rustos.bin
-

src/gdt.rs

@@ -1,47 +0,0 @@
-use x86_64::VirtAddr;
-use x86_64::structures::tss::TaskStateSegment;
-use x86_64::structures::gdt::{GlobalDescriptorTable, Descriptor, SegmentSelector};
-use lazy_static::lazy_static;
-
-//double fault interrupt stack table
-pub const DOUBLE_FAULT_IST_INDEX: u16 = 0;
-
-lazy_static! {
-  static ref TSS: TaskStateSegment = {
-    let mut tss = TaskStateSegment::new();
-    tss.interrupt_stack_table[DOUBLE_FAULT_IST_INDEX as usize] = {
-      const STACK_SIZE: usize = 4096; //4k stack
-
-      //this static mut is temporarily the stack until proper allocation can be implemented
-      static mut STACK: [u8; STACK_SIZE] = [0; STACK_SIZE];
-      let stack_start = VirtAddr::from_ptr(unsafe { &STACK });
-      let stack_end = stack_start + STACK_SIZE;
-      stack_end
-    };
-    tss
-  };
-}
-
-struct Selectors {
-  code_selector: SegmentSelector,
-  data_selector: SegmentSelector,
-}
-
-lazy_static! {
-  static ref GDT: (GlobalDescriptorTable, Selectors) = {
-    let mut gdt = GlobalDescriptorTable::new();
-    let code_selector = gdt.add_entry(Descriptor::kernel_code_segment());
-    let data_selector = gdt.add_entry(Descriptor::tss_segment(&TSS));
-    (gdt, Selectors { code_selector, data_selector })
-  };
-}
-
-pub fn init() {
-  use x86_64::instructions::segmentation::set_cs;
-  use x86_64::instructions::tables::load_tss;
-  GDT.0.load();
-  unsafe {
-    set_cs(GDT.1.code_selector);
-    load_tss(GDT.1.data_selector);
-  }
-}

src/interrupts.rs

@@ -1,98 +0,0 @@
-use lazy_static::lazy_static;
-use x86_64::structures::idt::{InterruptStackFrame, InterruptDescriptorTable};
-use crate::println;
-use pic8259_simple::ChainedPics;
-use spin;
-use crate::gdt;
-
-#[derive(Copy, Clone, Debug)]
-#[repr(u8)]
-pub enum InterruptIndex {
-  Timer = PIC_1_OFFSET,
-  Keyboard,
-}
-
-impl InterruptIndex {
-  fn as_u8(self) -> u8 {
-    self as u8
-  }
-  fn as_usize(self) -> usize {
-    usize::from(self as u8)
-  }
-}
-
-
-const PIC_1_OFFSET: u8 = 32;
-const PIC_2_OFFSET: u8 = PIC_1_OFFSET + 8;
-static PICS: spin::Mutex<ChainedPics> =
-    spin::Mutex::new(unsafe { ChainedPics::new(PIC_1_OFFSET, PIC_2_OFFSET) });
-
-lazy_static! {
-  static ref IDT: InterruptDescriptorTable = {
-    let mut idt = InterruptDescriptorTable::new();
-    idt.breakpoint.set_handler_fn(breakpoint_handler);
-    unsafe {
-    idt.double_fault.set_handler_fn(double_fault_handler)
-      .set_stack_index(gdt::DOUBLE_FAULT_IST_INDEX);
-    }
-    idt[InterruptIndex::Timer.as_usize()]
-      .set_handler_fn(timer_interrupt_handler);
-    idt[InterruptIndex::Keyboard.as_usize()]
-      .set_handler_fn(keyboard_interrupt_handler);
-    idt
-  };
-}
-
-pub fn init_idt() {
-  IDT.load();
-}
-
-pub fn initalize_pics() {
-  unsafe {
-    PICS.lock().initialize();
-  }
-  x86_64::instructions::interrupts::enable();
-}
-
-extern "x86-interrupt" fn breakpoint_handler(stack_frame: &mut InterruptStackFrame) {
-
-  println!("EXCEPTION - BREAKPOINT\n{:#?}", stack_frame);
-}
-
-extern "x86-interrupt" fn double_fault_handler(stack_frame: &mut InterruptStackFrame, code: u64) {
-  panic!("EXCEPTION - DOUBLE FAULT (code {})\n{:#?}", code, stack_frame);
-}
-
-extern "x86-interrupt" fn timer_interrupt_handler(_stack_frame: &mut InterruptStackFrame) {
-  print!(".");
-  unsafe {
-    PICS.lock().notify_end_of_interrupt(InterruptIndex::Timer.as_u8())
-  }
-}
-
-extern "x86-interrupt" fn keyboard_interrupt_handler(_stack_frame: &mut InterruptStackFrame) {
-  use x86_64::instructions::port::Port;
-  use pc_keyboard::{Keyboard, ScancodeSet1, DecodedKey, HandleControl, layouts};
-  use spin::Mutex;
-
-  lazy_static! {
-    static ref KEYBOARD: Mutex<Keyboard<layouts::Us104Key, ScancodeSet1>> =
-      Mutex::new(Keyboard::new(layouts::Us104Key, ScancodeSet1, HandleControl::Ignore));
-  }
-
-  let mut keyboard = KEYBOARD.lock();
-  let mut port = Port::new(0x60);
-  let scancode: u8 = unsafe { port.read() };
-
-  if let Ok(Some(key_event)) = keyboard.add_byte(scancode) {
-    if let Some(key) = keyboard.process_keyevent(key_event) {
-      match key {
-	DecodedKey::Unicode(character) => print!("{}", character),
-	DecodedKey::RawKey(key) => print!("{:?}", key),
-      }
-    }
-  }
-  unsafe {
-    PICS.lock().notify_end_of_interrupt(InterruptIndex::Keyboard.as_u8())
-  }
-}

src/main.rs

@@ -1,41 +1,37 @@
-#![feature(abi_x86_interrupt, asm)]
+//#![feature(abi_x86_interrupt, asm)]
 #![no_std]
 #![no_main]
 
+/*
 #[macro_use]
 mod vga_buffer;
-mod interrupts;
-mod gdt;
+*/
 
 use core::panic::PanicInfo;
 
 #[panic_handler]
-fn panic(info: &PanicInfo) -> ! {
-  println!("{}", info);
-  halt_loop();
+fn panic(_info: &PanicInfo) -> ! {
+    loop {}
 }
 
-pub fn init() {
-  interrupts::initalize_pics();
-  gdt::init();
-  interrupts::init_idt();
-}
+static GAMARJOBA: &[u8] = b"Gamarjoba, MVNDE!";
 
 #[no_mangle]
 pub extern "C" fn _start() -> ! {
-  init();
+    let vga_buffer = 0xb8000 as *mut u8;
+
+    for (i, &byte) in GAMARJOBA.iter().enumerate() {
+        let i = i as isize;
+        unsafe {
+            *vga_buffer.offset(i * 2) = byte;
+            *vga_buffer.offset(i * 2 + 1) = 0xd;
 
 
+        }
 
-  for i in 1..10 {
-    println!("Gamarjoba, munde: {}", i);
-  }
-  halt_loop();
+    }
+
+    loop {}
 }
 
-pub fn halt_loop() -> ! {
-  loop {
-    x86_64::instructions::hlt();
-  }
-}