Re-add shell.nix

Makefile.toml

@@ -19,6 +19,9 @@ env_scripts = [
         set_env QEMUCOMMAND "qemu-system-loongarch64"
         set_env LIMINEBIN "BOOTLOONGARCH64.EFI"
     end
+    if eq ${LIMINEDIR} ""
+        set_env LIMINEDIR "/usr/share/limine"
+    end
     '''
 ]
 
@@ -27,7 +30,7 @@ default_to_workspace = false
 
 [env]
 # Directory for Limine binaries
-LIMINEDIR = "/usr/share/limine"
+
 # Compile target
 TARGET = "x86_64-unknown-none"
 

configs/limine.conf

@@ -4,6 +4,5 @@ timeout: 0
     protocol: limine
     kernel_path: boot():/boot/${ARCH}/gila
     cmdline: -loglevel=Trace -logdev=display,serial -initramfs=/boot/${ARCH}/initramfs.tar.lzma
-    module_path: boot():/boot/${ARCH}/initramfs.tar.lzma
     kaslr: yes
     randomize_hhdm_base: yes

docs/DEVELOPMENT.MD

@@ -54,14 +54,23 @@ containing system servers, such as the init server and device drivers.
 This project uses [cargo-make](https://github.com/sagiegurari/cargo-make) to
 handle building ISOs and managing files not associated with Cargo. You need to
 install it before you can build an ISO automatically. To do so, you can run
-`cargo install cargo-make`. In addition, you will also need:
+`cargo install cargo-make`. 
+
+### Dependencies
+
+If you use NixOS or the Nix package manager, simply run `nix-shell` in the root
+directory. All necessary dependencies will be made available.
+
+If not, the following dependencies will need to be manually installed:
 
 - `rustup` command installed
 - `limine` command installed
 - `xorriso` command installed
 - `qemu-system-{your target architecture}` command installed (for running)
 
-Then run `cargo make` to invoke the [Makefile.toml](../Makefile.toml).
+### Build System
+
+Run `cargo make` to invoke the [Makefile.toml](../Makefile.toml).
 
 - `cargo make clean_all`: Cleans all built binaries, libraries, initramfs
 files, and ISOs.

kernel/src/arch/x86_64/gdt.rs

@@ -44,6 +44,7 @@ pub fn read_gdt() -> GlobalDescriptorTable {
     // Bits 16 through 79 are the virtual address of the GDT.
     let limit = addr.bits(0..=15) as usize + 1;
     let base = addr.bits(16..=79) as u64;
-    let gdt_raw: &[u64] = unsafe { core::slice::from_raw_parts(base as *const u64, (limit / 8) - 1) };
+    let gdt_raw: &[u64] =
+        unsafe { core::slice::from_raw_parts(base as *const u64, (limit / 8) - 1) };
     GlobalDescriptorTable::from_raw_entries(gdt_raw)
 }

kernel/src/boot/modules.rs

@@ -19,15 +19,14 @@ pub static FILE_REQUEST: ExecutableFileRequest = limine::request::ExecutableFile
 pub static MODULE_REQUEST: ModuleRequest = limine::request::ModuleRequest::new();
 
 lazy_static! {
-    pub static ref MODULE_RESPONSE: &'static ModuleResponse = MODULE_REQUEST
+    pub static ref MODULE_RESPONSE: Option<&'static ModuleResponse> = MODULE_REQUEST.get_response();
-        .get_response()
-        .expect("Bootloader did not return kernel modules");
 }
 
 pub fn log_modules() {
-    if !MODULE_RESPONSE.modules().is_empty() {
+    if let Some(modules) = *MODULE_RESPONSE {
+        if !modules.modules().is_empty() {
             let mut log_msg: String = String::from("Kernel modules list:\n");
-        for module in MODULE_RESPONSE.modules() {
+            for module in modules.modules() {
                 log_msg.push_str(&format!(
                     "\t{}",
                     String::from_utf8_lossy(module.path().to_bytes())
@@ -35,4 +34,7 @@ pub fn log_modules() {
             }
             log_trace!("{log_msg}")
         }
+    } else {
+        log_trace!("No modules found.");
+    }
 }

kernel/src/main.rs

@@ -16,8 +16,6 @@ mod panic;
 mod process;
 mod util;
 
-use core::{arch::asm, ptr::addr_of};
-
 use arch::x86_64::interrupts::IDT;
 use arch::x86_64::serial::SerialPort;
 use boot::{BASE_REVISION, params, *};
@@ -31,7 +29,10 @@ use limine::firmware_type::FirmwareType;
 use spin::mutex::Mutex;
 
 use crate::{
-    arch::x86_64::{cpuid::{CPUID, virt_supported}, gdt::GdtEntryRead},
+    arch::x86_64::{
+        cpuid::{CPUID, virt_supported},
+        gdt::GdtEntryRead,
+    },
     memory::HHDM_RESPONSE,
 };
 
@@ -168,7 +169,11 @@ unsafe extern "C" fn main() -> ! {
     let gdt = crate::arch::x86_64::gdt::read_gdt();
     log_info!("GDT length: {}", gdt.limit() + 1);
     for entry in gdt.entries() {
-        log_info!("GDT entry: Flags 0b{:b}, Access 0b{:b}", entry.flags(), entry.access());
+        log_info!(
+            "GDT entry: Flags 0b{:b}, Access 0b{:b}",
+            entry.flags(),
+            entry.access()
+        );
     }
 
     panic!("Finished boot, but cannot start init because processes not implemented!");

kernel/src/memory/mod.rs

@@ -96,7 +96,10 @@ pub fn log_address() {
             resp.physical_base()
         );
         log_info!("Kernel virtual start address: 0x{:x}", resp.virtual_base());
-        log_info!("Kernel physical start address (calculated): 0x{:x}", 0i64 - resp.virtual_base() as i64 + resp.physical_base() as i64);
+        log_info!(
+            "Kernel physical start address (calculated): 0x{:x}",
+            0i64 - resp.virtual_base() as i64 + resp.physical_base() as i64
+        );
     } else {
         log_warning!("No kernel address response provided.");
     }

kernel/src/memory/paging.rs

@@ -1,17 +1,14 @@
-
-use x86_64::structures::paging::PageTable;
-use x86_64::VirtAddr;
 use lazy_static::lazy_static;
+use x86_64::VirtAddr;
+use x86_64::structures::paging::PageTable;
 use x86_64::structures::paging::PageTableFlags;
 
 use crate::log::*;
-use crate::memory::format;
 use crate::memory::HHDM_RESPONSE;
+use crate::memory::format;
 
 #[allow(dead_code)]
-pub unsafe fn active_level_4_table()
+pub unsafe fn active_level_4_table() -> &'static mut PageTable {
-    -> &'static mut PageTable
-{
     use x86_64::registers::control::Cr3;
 
     let (level_4_table_frame, _) = Cr3::read();
@@ -44,9 +41,6 @@ pub fn iter_table(level: usize, table: &PageTable) {
     }
 }
 
-
-
-
 /*
     let l4_table = unsafe { active_level_4_table() };
 

libgila/src/syscall/mod.rs

@@ -5,8 +5,7 @@ use num_traits::FromPrimitive;
 
 use crate::arch;
 
-pub struct SyscallError {
+pub struct SyscallError {}
-}
 
 #[repr(u32)]
 #[derive(FromPrimitive, Debug)]

shell.nix

@@ -0,0 +1,28 @@
+let
+  nixpkgs = fetchTarball "https://github.com/NixOS/nixpkgs/archive/nixos-unstable.tar.gz";
+  pkgs = import nixpkgs { config = {}; overlays = []; };
+in
+
+pkgs.mkShell {
+
+  packages = with pkgs; [
+    bash
+    limine-full
+    xorriso
+    rustup
+    qemu
+    cargo-make
+  ];
+
+  buildInputs = with pkgs; [
+    limine-full
+  ];
+
+  shellHook = ''
+    rustup default nightly;
+    rustup target add x86_64-unknown-none
+    export LIMINEDIR="${pkgs.limine-full}/share/limine"
+  '';
+
+}
+