saving before I sleep

Cargo.lock

@@ -106,16 +106,23 @@ dependencies = [
  "enumflags2",
  "fdt",
  "flagset",
+ "intbits",
  "lazy_static",
  "limine",
  "lzma-rs",
  "once_cell",
- "raw-cpuid",
  "spin 0.10.0",
  "talc",
+ "tar-no-std",
  "x86_64",
 ]
 
+[[package]]
+name = "intbits"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5170c2c8ecda29c1bccb9d95ccbe107bc75fa084dc0c9c6087e719f9d46330e5"
+
 [[package]]
 name = "lazy_static"
 version = "1.5.0"
@@ -166,6 +173,15 @@ version = "2.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
 
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "once_cell"
 version = "1.21.3"
@@ -200,15 +216,6 @@ dependencies = [
  "proc-macro2",
 ]
 
-[[package]]
-name = "raw-cpuid"
-version = "11.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c6df7ab838ed27997ba19a4664507e6f82b41fe6e20be42929332156e5e85146"
-dependencies = [
- "bitflags",
-]
-
 [[package]]
 name = "rustversion"
 version = "1.0.20"
@@ -256,6 +263,18 @@ dependencies = [
  "lock_api",
 ]
 
+[[package]]
+name = "tar-no-std"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "15574aa79d3c04a12f3cb53ff976d5571e53b9d8e0bdbe4021df0a06473dd1c9"
+dependencies = [
+ "bitflags",
+ "log",
+ "memchr",
+ "num-traits",
+]
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.18"

Cargo.toml

@@ -8,14 +8,14 @@ acpi = "5.1.0"
 enumflags2 = "0.7.11"
 fdt = { git = "https://github.com/repnop/fdt", version = "0.2.0-alpha1" }
 flagset = "0.4.7"
+intbits = "0.2.0"
 lazy_static = { version = "1.5.0", default-features = false, features = ["spin_no_std"] }
 limine = "0.4.0"
 lzma-rs = { git = "https://github.com/glaeqen/lzma-no-std-rs/", version = "0.2.0", default-features = false }
 once_cell = { version = "1.20.3", default-features = false, features = ["alloc", "critical-section"] }
-raw-cpuid = "11.5.0"
 spin = "0.10.0"
 talc = "4.4.2"
-x86_64 = "0.15.2"
+tar-no-std = "0.3.4"
 
 [target.'cfg(target_arch = "x86_64")'.dependencies]
 x86_64 = "0.15.2"

README.md

@@ -7,7 +7,7 @@ Gila is a Rust microkernel OS, inspired by the Xinu embedded OS, as well as Linu
 
 ### Complete
 
-- Builds for multiple architectures
+- Builds for AArch64, RISCV64, x86_64, and LoongArch64
 - Valid Limine kernel
 - Boots on `x86_64`
 - Kernel command line parameters
@@ -17,25 +17,34 @@ Gila is a Rust microkernel OS, inspired by the Xinu embedded OS, as well as Linu
 
 ### In-Progress
 
-- Multi-architecture feature support
 - Display console
 - Serial console
+- Device discovery & APIs
+- Power management
+- Paging
 
 ### Future/Desired
 
-- Code execution
+- Userspace binaries/processes
+- Interprocess communication
+- Driver server interface
 - Interrupts and timers
 - Context switching
 - Process scheduling
-- Shell and CLI
 - System calls (multi-convention?)
-- Multi-user support and access control
+- Capability access control
 - Simultaneous multiprocessing support
-- ACPI, USB, PCI(e), SATA
-- Filesystem support (FAT32)
-- Application sandboxing/permissions control
-- Graphical desktop environment
-- Networking support
+- Hypervisor functionality
+
+### Additional Future Features (Userspace)
+
+- Device drivers
+- Filesystem drivers
+- Shell
+- Standard system API
+- Rust and C stdlib port
+- Display/windowing
+- Application sandboxing
 
 ## Licensing
 
@@ -64,7 +73,7 @@ Licensed under the GNU Public License v3. See [LICENSE](LICENSE) for details.
 
 ## Building and running
 
-Building a bootable kernel is easy. All you need to do is run `cargo build --bin kernel`, and a valid, bootable Limine executable will be generated. However, it cannot be booted without installing it in a bootable Limine filesystem, and it cannot do anything useful without an initramfs containing system servers such as the init server and 
+Building a bootable kernel is easy. All you need to do is run `cargo build --bin kernel`, and a valid, bootable Limine executable will be generated. However, it cannot be booted without installing it in a bootable Limine filesystem, and it cannot do anything useful without an initramfs 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:
@@ -76,20 +85,13 @@ This project uses [cargo-make](https://github.com/sagiegurari/cargo-make) to han
 
 Then run `cargo make` to invoke the [Makefile.toml](Makefile.toml).
 
-- `cargo make prepare`: Installs needed Rust toolchain.
 - `cargo make clean_all`: Cleans all built binaries, libraries, initramfs files, and ISOs.
-- `cargo make clean_iso`: Clean only files involved in building the ISO.
-- `cargo make clean_initramfs`: Clean only files involved in building the initramfs.
-- `cargo make clean_kernel`: Clean only kernel binaries and libraries.
 - `cargo make lib`: Builds `libgila`, the library that the kernel and user code are linked against.
 - `cargo make kernel`: Builds the kernel ELF file.
-- `cargo make bins`: Builds all binaries included in the system.
 - `cargo make initramfs`: Build the init archive.
 - `cargo make iso`: Builds the bootable ISO with Limine installed.
 - `cargo make run`: Builds the ISO and boots it in QEMU.
 - `cargo make debug`: Launch the kernel in QEMU with debugging enabled, and start and connect GDB.
-- `cargo make debug_run`: Launch the kernel in QEMU for debugging.
-- `cargo make debug_view`: Attach to a running QEMU process to debug.
 
 You do not need to clean any files after making changes. The `lib`, `kernel`, and `iso` tasks will automatically be rerun if their input files change.
 
@@ -108,9 +110,9 @@ Kernel parameters are passed as part of the `cmdline` through [limine.conf](limi
 
 List of current extant kernel parameters:
 
-- `-loglevel`: Can be a number or string corresponding to a log level. Only one value supported. Current options are `Disabled`, `Trace`, `Info`, `Warning`, `Error`, and `Critical`.
-- `-logdev`: A sequence of one or more values representing devices to log to. Current options are `display` and `serial`.
-- `-initramfs`: A valid path to a module to serve as the initramfs (containing the init binary). Only one value supported.
+- `-loglevel`: Can be a number or string corresponding to a log level. Only one value supported. Current options are `Disabled`, `Trace`, `Info`, `Warning`, `Error`, and `Critical`. This parameter is case insensitive.
+- `-logdev`: A sequence of one or more values representing devices to log to. Current options are `display` and `serial`. This parameter is case insensitive.
+- `-initramfs`: A valid path to a module to serve as the initramfs (containing the init binary). Only one value supported. This parameter is case sensitive.
 
 The default behavior for each parameter, when not supplied, is:
 

src/kernel/arch/x86_64/gdt.rs

@@ -1,25 +1,18 @@
-use x86_64::structures::gdt::{Descriptor, GlobalDescriptorTable};
+// Copyright (c) 2025 shibedrill
+// SPDX-License-Identifier: GPL-3.0-or-later
 
-use lazy_static::lazy_static;
+use core::arch::asm;
+use core::ptr::addr_of_mut;
 
-use crate::log::{LOGGER, LogLevel};
-use crate::{critical_section, format, log_trace};
+use intbits::Bits;
 
-lazy_static! {
-    pub static ref GDT: GlobalDescriptorTable = {
-        let mut gdt = GlobalDescriptorTable::new();
-        gdt.append(Descriptor::kernel_code_segment());
-        gdt
-    };
+pub unsafe fn gdt() -> (u8, u64) {
+    let mut addr: u128 = 0;
+    unsafe {
+        asm! {
+            "sgdt [rax]",
+            in("rax") addr_of_mut!(addr),
         }
-
-#[allow(dead_code)]
-pub fn setup_gdt() {
-    critical_section!({
-        GDT.load();
-        log_trace!(
-            "GDT: Setting up global descriptor table at 0x{:x}",
-            core::ptr::addr_of!(GDT) as usize
-        );
-    });
+    }
+    (addr.bits(0..=15) as u8, addr.bits(16..=79) as u64)
 }

src/kernel/boot/mod.rs

@@ -9,6 +9,7 @@ use limine::{BaseRevision, request::*};
 #[used]
 #[unsafe(link_section = ".requests_start_marker")]
 static _START_MARKER: RequestsStartMarker = RequestsStartMarker::new();
+
 #[used]
 #[unsafe(link_section = ".requests_end_marker")]
 static _END_MARKER: RequestsEndMarker = RequestsEndMarker::new();
@@ -16,28 +17,15 @@ static _END_MARKER: RequestsEndMarker = RequestsEndMarker::new();
 #[used]
 #[unsafe(link_section = ".requests")]
 pub static BASE_REVISION: BaseRevision = limine::BaseRevision::new();
+
 #[used]
 #[unsafe(link_section = ".requests")]
 pub static MP_REQUEST: MpRequest = limine::request::MpRequest::new();
-#[used]
-#[unsafe(link_section = ".requests")]
-pub static FILE_REQUEST: ExecutableFileRequest = limine::request::ExecutableFileRequest::new();
-#[used]
-#[unsafe(link_section = ".requests")]
-pub static RSDP_REQUEST: RsdpRequest = limine::request::RsdpRequest::new();
-#[used]
-#[unsafe(link_section = ".requests")]
-pub static MODULE_REQUEST: ModuleRequest = limine::request::ModuleRequest::new();
-#[used]
-#[unsafe(link_section = ".requests")]
-pub static ADDRESS_REQUEST: ExecutableAddressRequest =
-    limine::request::ExecutableAddressRequest::new();
+
 #[used]
 #[unsafe(link_section = ".requests")]
 pub static FRAMEBUFFER_REQUEST: FramebufferRequest = limine::request::FramebufferRequest::new();
-#[used]
-#[unsafe(link_section = ".requests")]
-pub static MEMMAP_REQUEST: MemoryMapRequest = limine::request::MemoryMapRequest::new();
+
 #[used]
 #[unsafe(link_section = ".requests")]
 pub static DTB_REQUEST: DeviceTreeBlobRequest = limine::request::DeviceTreeBlobRequest::new();

src/kernel/boot/modules.rs

@@ -2,9 +2,18 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 use lazy_static::lazy_static;
-use limine::response::ModuleResponse;
+use limine::{
+    request::{ExecutableFileRequest, ModuleRequest},
+    response::ModuleResponse,
+};
 
-use crate::boot::MODULE_REQUEST;
+#[used]
+#[unsafe(link_section = ".requests")]
+pub static FILE_REQUEST: ExecutableFileRequest = limine::request::ExecutableFileRequest::new();
+
+#[used]
+#[unsafe(link_section = ".requests")]
+pub static MODULE_REQUEST: ModuleRequest = limine::request::ModuleRequest::new();
 
 lazy_static! {
     pub static ref MODULE_RESPONSE: &'static ModuleResponse = MODULE_REQUEST

src/kernel/boot/params.rs

@@ -1,7 +1,7 @@
 // Copyright (c) 2025 shibedrill
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-use crate::boot::FILE_REQUEST;
+use crate::boot::modules::FILE_REQUEST;
 use crate::memory::alloc;
 use alloc::string::String;
 use alloc::vec::Vec;

src/kernel/device/acpi.rs

@@ -2,3 +2,9 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // TODO: Implement per-arch memory handlers for ACPI memory map regions
+
+use limine::request::RsdpRequest;
+
+#[used]
+#[unsafe(link_section = ".requests")]
+pub static RSDP_REQUEST: RsdpRequest = limine::request::RsdpRequest::new();

src/kernel/device/mod.rs

@@ -6,21 +6,12 @@ mod acpi;
 use fdt::*;
 use lazy_static::lazy_static;
 use limine::response::{DeviceTreeBlobResponse, RsdpResponse};
-use raw_cpuid::native_cpuid::CpuIdReaderNative;
-use raw_cpuid::*;
 
-use crate::boot::{DTB_REQUEST, RSDP_REQUEST};
+use crate::boot::DTB_REQUEST;
+use crate::device::acpi::RSDP_REQUEST;
 use crate::log::{LOGGER, LogLevel};
 use crate::{format, log_info, log_trace, log_warning};
 
-pub fn log_cpuid() {
-    let cpuid: CpuId<CpuIdReaderNative> = CpuId::with_cpuid_reader(CpuIdReaderNative);
-    log_trace!(
-        "Device: CPU vendor: {}",
-        cpuid.get_processor_brand_string().unwrap().as_str()
-    )
-}
-
 lazy_static! {
     pub static ref DTB: Option<&'static DeviceTreeBlobResponse> = match DTB_REQUEST.get_response() {
         Some(resp) => {

src/kernel/interrupt/mod.rs

@@ -1,3 +1,6 @@
+// Copyright (c) 2025 shibedrill
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 pub fn double_fault(info: &str) -> ! {
     panic!("Double fault: {}", info);
 }

src/kernel/main.rs

@@ -19,17 +19,21 @@ mod process;
 #[macro_use]
 mod util;
 
+use core::arch::asm;
+
+use arch::x86_64::gdt::gdt;
 #[cfg(target_arch = "x86_64")]
 use arch::x86_64::serial::Serialport;
 
 use arch::asm::*;
 use boot::{modules::*, params, *};
 use constants::*;
-use device::*;
 use log::*;
+use memory::{MEMMAP_REQUEST, HHDM_RESPONSE};
 use memory::alloc::{format, string::*, vec};
 use params::*;
 
+use intbits::{self, Bits};
 use limine::file::File;
 use limine::memory_map::EntryType;
 #[allow(unused_imports)]
@@ -195,8 +199,7 @@ unsafe extern "C" fn main() -> ! {
         panic!("Memory map contains no entries");
     }
 
-    //#[cfg(target_arch = "x86_64")]
-    //gdt::setup_gdt();
+    log_info!("HHDM offset: 0x{:x}", HHDM_RESPONSE.offset());
 
     #[cfg(target_arch = "x86_64")]
     {
@@ -208,9 +211,22 @@ unsafe extern "C" fn main() -> ! {
             "Boot: Paging enable: {}",
             unsafe { cr0() & (0b1 << 31) } == 1
         );
+        let pd_addr = {
+            let cr3: u64;
+            unsafe {
+                asm! {
+                    "mov {}, cr3",
+                    out(reg) cr3,
+                }
+            }
+            log_trace!("Boot: cr3 value: 0b{:b}", cr3);
+            cr3.bits(12..=31)
+        };
+        log_trace!("Boot: Physical address of page directory: 0x{:x}", pd_addr);
+        log_trace!("Boot: Virtual address of page directory: 0x{:x}", pd_addr + HHDM_RESPONSE.offset());
+        log_trace!("Boot: GDT: 0x{:x} bytes @ 0x{:x}", unsafe { gdt().0 }, unsafe { gdt().1} );
+        log_trace!("Boot: GDT: 0x{:x}", unsafe { *((gdt().1 + 0x0) as *const u64) })
     }
-
-    log_cpuid();
 
     panic!("Bailing");
 

src/kernel/memory.rs

@@ -4,12 +4,31 @@
 #![allow(unused_imports)]
 
 use enumflags2::*;
+use lazy_static::lazy_static;
+use limine::{request::{ExecutableAddressRequest, HhdmRequest, MemoryMapRequest}, response::HhdmResponse};
 
 use core::alloc::{Allocator, Layout};
 use talc::*;
 
 pub extern crate alloc;
 
+#[used]
+#[unsafe(link_section = ".requests")]
+pub static ADDRESS_REQUEST: ExecutableAddressRequest =
+    limine::request::ExecutableAddressRequest::new();
+
+#[used]
+#[unsafe(link_section = ".requests")]
+pub static MEMMAP_REQUEST: MemoryMapRequest = limine::request::MemoryMapRequest::new();
+
+#[used]
+#[unsafe(link_section = ".requests")]
+pub static HHDM_REQUEST: HhdmRequest = limine::request::HhdmRequest::new();
+
+lazy_static! {
+    pub static ref HHDM_RESPONSE: &'static HhdmResponse = HHDM_REQUEST.get_response().expect("Did not get HHDM response from bootloader");
+}
+
 static mut ARENA: [u8; 10000] = [0; 10000];
 
 #[global_allocator]

src/kernel/util.rs

@@ -1,3 +1,6 @@
+// Copyright (c) 2025 shibedrill
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #[macro_export]
 macro_rules! critical_section {
     ($b:block) => {