Initial code

Writes "Gamarjoba, munde!" to the VGA text buffer

.gitignore

@@ -1,5 +1,8 @@
 
 *.o
+*.iso
+*.bin
 gamarjoba_munde/gamarjoba
 baremetal_gamarjoba/baremetal_gamarjoba
 keyboard/keyboard_kernel
+target/

Makefile

@@ -1,48 +0,0 @@
-
-
-gamarjoba: gamarjoba.asm
-	nasm -f elf64 -o gamarjoba.o gamarjoba.asm
-	ld -o gamarjoba gamarjoba.o
-
-run_gamarjoba: gamarjoba
-	./gamarjoba
-
-baremetal_gamarjoba: baremetal_gamarjoba.asm include.c
-	gcc -m32 -ffreestanding -o include.o -c include.c
-	nasm -f elf32 baremetal_gamarjoba.asm
-	ld -m elf_i386 -nostdlib -T linker.ld baremetal_gamarjoba.o include.o -o baremetal_gamarjoba
-
-run_baremetal_gamarjoba: baremetal_gamarjoba
-	qemu-system-i386 -kernel baremetal_gamarjoba
-
-keyboard: keyboard.asm c_keyboard.c keyboard.rs
-	gcc -m32 -ffreestanding -o c_keyboard.o -c c_keyboard.c
-	rustc --emit obj -o rust_keyboard.o --target i686-unknown-linux-gnu keyboard.rs
-	nasm -f elf32 keyboard.asm
-	ld -m elf_i386 -nostdlib -T linker.ld keyboard.o c_keyboard.o rust_keyboard.o -o keyboard
-
-run_keyboard: keyboard
-	qemu-system-i386 -kernel keyboard
-
-run_terminal_keyboard: keyboard
-	qemu-system-i386 -display curses -kernel keyboard
-
-
-lightshow: lightshow.asm lightshow.rs
-	rustc --emit obj -o lightshow_rust.o --target i686-unknown-linux-gnu -g lightshow.rs
-	nasm -f elf32 -g lightshow.asm
-	ld -m elf_i386 -nostdlib -T linker.ld lightshow.o lightshow_rust.o -o lightshow
-
-run_lightshow: lightshow
-	qemu-system-i386 -kernel lightshow
-
-debug_lightshow: lightshow
-	qemu-system-i386 -kernel lightshow -gdb tcp::9999 -S
-
-.PHONY: clean
-clean:
-	rm -f *.o
-	rm -f gamarjoba
-	rm -f baremetal_gamarjoba
-	rm -f keyboard
-	rm -f lightshow

README.md

@@ -9,6 +9,7 @@ This repo contains the following executables:
 * `baremetal_gamarjoba` - bare-metal x86 program run with QEMU
 * `keyboard` - reads keycode information from keyboard. Also uses both Rust and C includes.
 * `lightshow` - NOTE: Broken - an attempt at a substantial #[no_core] rust object file, currently crashes rustc
+* `rust_kernel` - me following the 2015 version  of the Phil Opp rust bare metal tutorial. Kept around for posterity
 
 # Useful links
 

justfile

@@ -1,6 +1,12 @@
 default:
     just --list
 
+execute_rust_os:
+    #!/usr/bin/env bash
+    cd os-in-rust
+    cargo bootimage
+    qemu-system-x86_64 -drive format=raw,file=target/x86_64_target/debug/bootimage-os-in-rust.bin
+
 run_gamarjoba: build_gamarjoba
     ./gamarjoba_munde/gamarjoba
 

os-in-rust/.cargo/config.toml

@@ -0,0 +1,6 @@
+[unstable]
+build-std = ["core", "compiler_builtins"]
+build-std-features = ["compiler-builtins-mem"]
+
+[build]
+target = "x86_64_target.json"

os-in-rust/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 = "os-in-rust"
+version = "0.1.0"
+dependencies = [
+ "bootloader",
+]

os-in-rust/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "os-in-rust"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+#bootloader = "0.10.12"
+bootloader = "0.9.8"

os-in-rust/src/main.rs

@@ -0,0 +1,30 @@
+#![no_std]
+#![no_main]
+
+use core::panic::PanicInfo;
+
+#[panic_handler]
+fn panic(_info: &PanicInfo) -> ! {
+    loop {}
+}
+
+static GAMARJOBA: &[u8] = b"Gamarjoba, MVNDE!";
+
+#[no_mangle]
+pub extern "C" fn _start() -> ! {
+    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;
+
+
+        }
+
+    }
+
+    loop {}
+}
+

os-in-rust/x86_64_target.json

@@ -0,0 +1,18 @@
+{
+    "llvm-target": "x86_64-unknown-none",
+    "data-layout": "e-m:e-i64:64-f80:128-n8:16:32:64-S128",
+    "arch": "x86_64",
+    "target-endian": "little",
+    "target-pointer-width": "64",
+    "target-c-int-width": "32",
+    "os": "none",
+    "executables": true,
+
+    "linker-flavor": "ld.lld",
+    "linker": "rust-lld",
+
+    "panic-strategy": "abort",
+    "disable-redzone": true,
+
+    "features": "-mmx,-sse,+soft-float"
+}

rust_boot.asm

@@ -1,7 +0,0 @@
-global start
-
-section .text
-bits 32
-start:
-    mov dword [0xb800], 0x2f4b2f4f
-    hlt

thousand-line-os/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "thousand-line-os"
+version = "0.1.0"

thousand-line-os/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "thousand-line-os"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

thousand-line-os/README.md

@@ -0,0 +1,3 @@
+# Thousand Line OS
+
+Aspirational. Following https://operating-system-in-1000-lines.vercel.app/en/

thousand-line-os/justfile

@@ -0,0 +1,11 @@
+_default:
+    @just --list
+
+
+
+run:
+    #!/usr/bin/env bash
+    #
+    QEMU=qemu-system-riscv32
+    # Start QEMU
+    $QEMU -machine virt -bios default -nographic -serial mon:stdio --no-reboot

thousand-line-os/kernel.ld

@@ -0,0 +1,28 @@
+ENTRY(boot)
+
+SECTIONS {
+    . = 0x80200000;
+
+    .text :{
+        KEEP(*(.text.boot));
+        *(.text .text.*);
+    }
+
+    .rodata : ALIGN(4) {
+        *(.rodata .rodata.*);
+    }
+
+    .data : ALIGN(4) {
+        *(.data .data.*);
+    }
+
+    .bss : ALIGN(4) {
+        __bss = .;
+        *(.bss .bss.* .sbss .sbss.*);
+        __bss_end = .;
+    }
+
+    . = ALIGN(4);
+    . += 128 * 1024; /* 128KB */
+    __stack_top = .;
+}

thousand-line-os/src/lib.rs

@@ -0,0 +1,14 @@
+#![no_std]
+#![no_main]
+
+#[no_mangle]
+pub extern "C" fn _start() -> ! {
+  init()
+}
+
+fn init() -> ! {
+    loop {
+
+    }
+}
+