V0.1.0: launching, VGA text buffer (#4)

* toml file was added for building the kernel

* the target for build was set

* implemented basic output using VGA buffer

* RandyX: launching via qemu

* RandyX: documentation + multikernel architecture

Author: git-user-cpp

.cargo/config.toml

@@ -1,2 +1,9 @@
 [unstable]
+build-std-features = ["compiler-builtins-mem"]
 build-std = ["core", "compiler_builtins"]
+
+[build]
+target = "x86_64-randyx.json"
+
+[target.'cfg(target_os = "none")']
+runner = "bootimage runner"

Cargo.lock

@@ -14,3 +14,4 @@ panic = "abort"
 panic = "abort" 
 
 [dependencies]
+bootloader = "0.9.8"

Cargo.toml

@@ -0,0 +1,30 @@
+# Running RandyX kernel
+
+## To be able to run RandyX kernel you need to:
+
+- have installed rustc nightly
+```
+rustup component add rust-src --toolchain nightly-x86_64-unknown-linux-gnu
+```
+
+- install bootimage to be able to run the kernel
+```
+cargo install bootimage
+```
+
+- install llvm-tools-preview
+```
+rustup component add llvm-tools-preview
+```
+
+## Running
+
+- install quemu
+```
+sudo apt install qemu-system-x86_64
+```
+
+- run the kernel
+```
+cargo run
+```

Documentation/running/running.md

@@ -0,0 +1 @@
+pub(crate) mod vga_output;

os/kernel/core/mod.rs

@@ -0,0 +1,10 @@
+pub fn vga_output_message(HELLO: &[u8]) {
+    let vga_buffer = 0xb8000 as *mut u8;
+
+    for(i, &byte) in HELLO.iter().enumerate(){
+        unsafe {
+            *vga_buffer.offset(i as isize * 2) = byte;
+            *vga_buffer.offset(i as isize * 2 + 1) = 0xb;
+        }
+    }
+}

os/kernel/core/vga_output.rs

@@ -0,0 +1 @@
+pub(crate) mod core;

os/kernel/mod.rs

@@ -18,14 +18,20 @@
 #![no_std]
 #![no_main]
 
+mod kernel;
+
 use core::panic::PanicInfo;
+use crate::kernel::core::vga_output::vga_output_message;
 
 #[panic_handler]
 fn panic(_info: &PanicInfo) -> ! {
     loop{}
 }
 
+static HELLO: &[u8] = b"RandyX is running...";
 #[no_mangle]
 pub extern "C" fn _start() -> ! {
+    vga_output_message(HELLO);
+
     loop{}
-}
+}

os/main.rs

@@ -0,0 +1,2 @@
+[toolchain]
+channel = "nightly"