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subhobhai943andClaude Opus 5
65b7a709cc
The launcher table is authored against an 800x600 work area, so at 1280x720 every window kept its original size and left the desktop looking sparse, while still overlapping the icon column the way it did at the design resolution. Launch geometry now scales with the work area, capped so a window cannot swallow the screen, and offset clear of the icon strip so launcher labels stay readable. The wallpaper grid was a single fixed colour, which is darker than the top of the gradient but lighter than the bottom, so the grid faded out across the lower half of the screen. It is blended now and reads the whole way down. Leaving the desktop hands the screen to the framebuffer console, and entering it takes the screen back, so Esc drops to a working TTY inside the emulator and `gui` returns to the desktop. Co-Authored-By: Claude Opus 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01L5yKJT4Wo2cV3rfPrwY5MP
278 lines
22 KiB
Markdown
278 lines
22 KiB
Markdown
# SUB-OS: Modular Monolithic Linux-Compatible Operating System
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```text
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_____ _ _ ____ ____ _____
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/ ____| | | | _ \ / __ \ / ____|
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| (___ | | | | |_) |______| | | | (___
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\___ \| | | | _ <|______| | | |\___ \
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____) | |__| | |_) | | |__| |____) |
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|_____/ \____/|____/ \____/|_____/
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```
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[]()
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[]()
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[]()
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[]()
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[]()
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[]()
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[]()
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[](https://github.com/subhobhai943/SUB-OS/releases/tag/v0.0.1-beta)
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[]()
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[]()
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[](LICENSE)
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**SUB-OS** is a multi-architecture, production-grade modular monolithic operating system kernel engineered in **C, C++17, Assembly, freestanding bare-metal Rust (`no_std`), and the custom SUB Language (`.sb`)**. Built for high performance, memory safety, modularity, and Unix/Linux compatibility, SUB-OS supports **64-bit x86 (`x86_64`)**, **64-bit ARM (`aarch64`)**, and **32-bit ARM (`armv8i` / AArch32)** targets.
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---
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## 🌟 Key Architecture & Capabilities
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- 🧵 **Kernel Concurrency Core (`kernel/wait.c`, `kernel/futex.c`, `kernel/rcu.c`)**:
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- **Wait Queues & Completions**: Sleeper parking with timed waits, one-shot completion barriers, and a static entry pool so a blocking path never re-enters the allocator (`waitinfo`).
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- **Futex Hash Table**: 32 buckets with value re-check on the slow path, requeue support, and an `fmutex_t` sleeping mutex built on the uncontended-fastpath protocol (`futexinfo`).
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- **Tiny RCU**: Lock-free readers with nesting depth tracking, deferred `call_rcu`/`kfree_rcu` callbacks, grace-period accounting, and `rcu_assign_pointer`/`rcu_dereference` publish barriers (`rcuinfo`).
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- 🧱 **Core Data Structures (`lib/rbtree.c`, `lib/kfifo.c`, `lib/hashtable.c`)**:
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- **Red-Black Tree**: Linux-compatible parent-pointer rbtree with full insert/erase rebalancing, forward and reverse in-order iteration, and a black-height invariant validator.
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- **kfifo Ring Buffer**: Power-of-two byte ring with free-running indices, so the wrap path costs one mask instead of a branch per byte.
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- **Hash Table**: Separately-chained FNV-1a table with string or `u64` keys and rehash-on-growth at a 3/4 load factor.
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- 💾 **Block Page Cache (`mm/page_cache.c`)**:
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- Write-back cache of 4 KB pages keyed by `(device, page index)`, indexed through the kernel hash table.
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- CLOCK second-chance eviction with dirty write-back, pinning, per-device flush and invalidate, and live hit-rate telemetry (`pagecache`).
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- 🧪 **In-Kernel Test Harness (`kernel/ktest.c`)**:
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- KUnit-style suites with assertion macros, per-case pass/fail reporting and timing.
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- **6 built-in suites, 21 cases, 735 assertions** covering rbtree, kfifo, hashtable, RCU, futex, wait queues, page cache and libcore — runnable from the shell (`ktest`) or the desktop KTest Runner.
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- 🎨 **Boot Logo & Splash Screen (`init/bootlogo.c`, `scripts/mklogo.py`)**:
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- **Two presentations of one artwork**: an ASCII rendition on the text console and serial line from the first moments of boot, then the real bitmap as a graphical splash once the video driver is up at step [5/14].
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- **4-bit palette-indexed asset**: 160x160 pixels in 12.5 KB rather than 100 KB, with a transparency mask so the mark composites onto the gradient instead of a flat rectangle.
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- **Animated progress bar** tied to the real boot stages, held for a minimum duration (`splashtime=<ms>`) so a sub-second boot still shows it; `nosplash`, `nogui` or `text` skip it.
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- **Regenerable**: `python3 scripts/mklogo.py path/to/logo.png` rewrites `init/logo_data.c` from source artwork.
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- 🔤 **Shared 8x8 Console Font (`lib/font8x8.c`)**: one glyph table behind the framebuffer console, the 2D canvas rasterizer and the desktop compositor, replacing three divergent private copies.
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- 🖵 **Framebuffer Console (`drivers/video/fbcon.c`)**:
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- Once the VBE adapter is in graphics mode the VGA text buffer stops being scanned out, so anything printed afterwards is invisible on the display even though it still reaches serial. fbcon renders the console into the framebuffer instead, the way Linux fbcon does.
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- **VT100 subset**: SGR colours, cursor addressing (`H`/`f`), relative moves, erase-display and erase-line, save/restore — enough for full-screen curses-style programs such as the **nano** editor to render correctly.
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- Presents a fixed **80x25** grid (matching `TTY_WIDTH`/`TTY_HEIGHT`, which the userland assumes) with the glyph cell scaled to fill whatever resolution is active.
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- The TTY driver dispatches `tty_write`, `tty_clear` and `tty_set_cursor` to it, so leaving the desktop with `Esc` drops to a working console **inside the emulator**, not just on the host serial line.
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- 🖥️ **SUB-OS Graphical Desktop Environment (`gui/`)**:
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- **SUB-WM Compositor**: 800x600 TrueColor double-buffered window manager with drag, corner resize, minimize/maximize/restore, edge snapping (left/right/maximize), tile and cascade layouts, and z-ordered painter's-algorithm compositing.
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- **SUB-WT Widget Toolkit (`gui/gui_widgets.c`)**: Immediate-mode controls -- buttons, labels, checkboxes, radios, sliders, list boxes, text fields, tab bars, scrollbars, progress bars, sparklines and badges -- so an app rebuilds its interface from state each frame instead of maintaining a retained widget tree.
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- **Icon Set (`gui/gui_icons.c`)**: 14 hand-drawn 16x16 palette-indexed glyphs, integer-scalable and tintable, driving the desktop grid, start menu and window chrome.
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- **Modal Dialog Layer (`gui/gui_dialog.c`)**: Info, warning, error and confirm dialogs that dim the desktop and take exclusive input, with word-wrapped messages and callback results.
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- **Desktop Shell (`gui/gui_desktop.c`)**: Gradient wallpaper with grid overlay, launcher icon grid, start menu, right-click context menu (tile / cascade / toggle grid), and a taskbar with per-window buttons, live CPU trace, memory badge and RTC clock.
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- **Terminal Emulator (`gui/gui_terminal.c`)**: dispatches to the real LazyBox applet table and the shared shell builtins, capturing each command's `printk` output through a console sink. ANSI colours are translated per line, CP437 box and block characters fall back to ASCII, and there is 256 lines of scrollback plus command history.
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- **Applications**: Terminal, File Explorer, System Monitor, Task Manager, Kernel Log viewer (live dmesg with severity colouring and scrollback), KTest Runner (drives the in-kernel suites and reports pass/fail), Text Editor, Calculator, Paint Studio, Clock & Calendar, Settings and About.
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- **Keyboard Shortcuts**: `F5` cycle focus, `F6` cascade, `F7` tile, `F8` maximize, `F9` minimize, `Esc` exit to the kernel TTY.
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- ⚡ **Freestanding C++17 OOP Kernel Engine (`kernel/cpp/`)**:
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- **Bare-Metal C++ Runtime**: `operator new`/`delete`, sized deallocation, placement `new`, pure virtual handlers (`__cxa_pure_virtual`), and `.init_array` global constructor dispatcher.
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- **Modern Generic Containers**: Pure freestanding `Vector<T>`, `UniquePtr<T>` (with polymorphic converting constructors and custom deleters), dynamic `String`, and move semantics (`kernel::move`, `kernel::forward`).
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- **Object-Oriented Device Driver Model**: Abstract `Device` base class with `BlockDevice`, `CharDevice`, `VirtualRamDiskDevice` (512B sector emulator), and `VirtualNull`/`VirtualZero` concrete classes managed by the `DeviceManager` singleton.
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- **C++ Microbenchmark Engine**: Validates zero-overhead abstractions, virtual method dynamic dispatch latency across 500,000 iterations, and dynamic container throughput.
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- **Interactive C++ Commands**: `cppinfo` (Kernel telemetry), `cppdevs` (OOP device tree), `cppbench` (Microbenchmarks), and `cpptest` (Polymorphic dispatch verifier).
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- 🐍 **Interactive In-Kernel Snake Game (`userland/lazybox/snake.c`)**:
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- Full-featured ANSI terminal game featuring real-time keyboard control (`WASD` and Arrow keys), dynamic food generation, score counter, body growth, wall/self collision detection, and autonomous simulation mode (`snake --demo`).
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- 🔮 **SUB Programming Language Kernel Signature & In-Kernel VM (`sub/` & `kernel/sub/`)**:
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- **Native `.sb` Kernel Modules**: Key subsystems written directly in the custom SUB language:
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- [`sub/signature.sb`](file:///home/subhobhai943/Github/SUB-OS/sub/signature.sb): Kernel identity, OS signature, and author credits.
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- [`sub/power_governor.sb`](file:///home/subhobhai943/Github/SUB-OS/sub/power_governor.sb): Dynamic CPU P-state thermal scaling and frequency/voltage calculations.
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- [`sub/benchmark.sb`](file:///home/subhobhai943/Github/SUB-OS/sub/benchmark.sb): Recursive Fibonacci and integer matrix benchmark algorithms.
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- [`sub/easter_egg.sb`](file:///home/subhobhai943/Github/SUB-OS/sub/easter_egg.sb): Interactive kernel quotes and easter eggs.
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- **In-Kernel SUB Virtual Machine & AST Interpreter (`subi`)**: Run `.sb` scripts or inline expressions live from the shell (`subi file.sb` or `subi -e "var x=10; print(x*2)"`).
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- 🦀 **"Rust for SUB-OS" Memory-Safe Kernel Layer (`rust/src/`)**:
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- **Freestanding Bare-Metal Rust**: Compiled with `rustc 1.75+` in pure `no_std` mode with static FFI bindings.
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- **Memory-Safe Cryptography**: RFC-8439 ChaCha20-Poly1305 AEAD authenticated cipher, CSPRNG entropy source, FIPS-202 SHA3-256 (Keccak-f[1600]), FIPS-197 AES-128, and RFC-4648 Base64 codec.
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- **Zero-Copy ELF Binary Parser**: Header and segment inspector validating ELF-64/32 binaries and architectures (`readelf`).
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- **Memory Fragmentation & Buddy Telemetry**: Order 0-10 buddy allocator tracking and external fragmentation indexes (`buddyinfo`).
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- **Storage & Disk Parsing**: Memory-safe MBR and GUID Partition Table (GPT) header and partition decoder (`fdisk`).
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- **Fast VFS Directory Cache (`dcache`)**: 64-entry LRU path hash table for single-cycle file and directory lookups.
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- **Kernel Health Watchdog & Heartbeat Monitor**: Subsystem sanity checker and anomaly detector.
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- **Zero-Copy JSON Tokenizer**: High-speed JSON key-value query engine for kernel configuration and REST API parsing.
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- **NetFilter Packet Evaluator**: Stateful firewall rule matcher and packet counter.
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- 🎯 **Multi-Architecture HAL**:
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- **`x86_64` (AMD64 / Intel 64)**: Custom 2-stage MBR bootloader, E820 BIOS memory mapping, 4-level PML4 48-bit paging, GDT, 256-entry IDT, 8259 PIC, 8254 PIT timer, Hardware FPU/SSE (CR4.OSFXSR).
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- **`aarch64` (ARMv8-A 64-Bit)**: Exception levels (EL1), 16-entry vector table, ARM Generic Interrupt Controller (GICv2), ARM Generic Arch Timer (100 Hz), Stage-1 39-bit VA MMU, PL011 UART.
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- **`armv8i` (ARM32 / AArch32)**: Banked exception mode stacks (IRQ, ABT, UND, SVC), VMSAv7 1MB Section MMU, GICv2 distributor, CP15 Generic Timer, VFP/NEON FPU, PL011 UART.
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- 🎛️ **Linux-Style Kconfig TUI Configurator (`make configure`)**:
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- Full interactive `lxdialog` GUI interface (Royal Blue backdrop, floating modal windows, drop shadows, and menu hierarchy).
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- Dynamic Kbuild-style selective compilation based on `.config` and `include/config/autoconf.h`.
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- 📁 **Storage & Filesystem Layer**:
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- **FAT32 (VFAT)** storage driver with directory traversal and `/mnt/fat32` auto-mounting.
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- **Second Extended (EXT2)** Linux filesystem driver.
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- **Virtual File System (VFS)**: POSIX `open`, `read`, `write`, `close`, `seek`, `mount` interface.
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- Synthetic **DevFS** (`/dev`), **ProcFS** (`/proc`), and **Sysfs KObject Hierarchy** (`/sys`).
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- Dynamic in-memory RAM disk (`/dev/ram0`).
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- 🖧 **Hardware Device Drivers**:
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- **Storage Controllers**: NVMe PCIe SSD, AHCI SATA 6Gb/s, IDE/ATA Hard Disks, VirtIO-Block.
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- **Network Adapters**: Intel 82540EM Gigabit Ethernet, Realtek RTL8139 Fast Ethernet, VirtIO-Net 10GbE.
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- **Multimedia & Display**: Bochs/VBE dynamic resolution video adapter, 2D TrueColor Canvas Rasterizer, Intel High Definition Audio (Azalia HDA), AC'97 sound codec, Formant TTS synthesizer, 8-Bit Melody player.
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- **Bus & Sensors**: PCI bus enumerator, USB 3.0 Extensible Host Controller (xHCI), HWMON CPU temperature and fan tachometer sensors, VirtIO-RNG hardware entropy generator, Unix98 PTY subsystem.
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- 🌐 **Networking, Firewalls & Daemons**:
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- Full L2–L4 IPv4 protocol stack with dynamic ARP, ICMP Echo (`ping`), UDP, and full 3-way handshake TCP state machine.
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- **NetFilter** stateful packet inspection firewall (iptables).
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- Built-in **OpenSSH 2.0 Daemon (`sshd`)** on port 2222.
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- Built-in **Micro HTTP REST API Server (`httpd`)** on port 8080.
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- 🔒 **Kernel Security & Async Engine**:
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- **Linux Security Module (LSM)** enforcing POSIX capabilities and DAC.
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- **X.509 Cryptographic Keyring** with signature verification.
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- In-Kernel **eBPF Register Virtual Machine** and verifier.
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- **io_uring** lockless asynchronous Submission/Completion ring buffers.
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- Preemptive multi-tasking scheduler with Round-Robin quantum and spinlock synchronization.
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- Systemd-style unit manager (`systemctl`), cron background scheduler (`crond`), and RFC 5424 Syslog engine.
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- 🧰 **LazyBox Userland Suite (85+ Linux, Rust, C++ & SUB-Lang Applets)**:
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- Interactive shell with history, quote-aware tokenization, tab autocompletion, ANSI cursor editing, and script runner (`sh`).
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- GNU-compatible **Nano** visual text editor.
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- **Text Processing Suite (`userland/lazybox/coreutils.c`)**: `sort`, `uniq`, `cut`, `tr`, `rev`, `tac`, `nl`, `seq`, `diff`, `xxd`, `du`, `factor`, `sum` and `truncate`, all reading through the VFS and handling the zero-length synthetic nodes procfs and sysfs expose.
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- **Kernel Diagnostics**: `ktest`, `rcuinfo`, `futexinfo`, `waitinfo` and `pagecache`.
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- Full utilities: `ls`, `cat`, `touch`, `mkdir`, `rm`, `cp`, `pwd`, `cd`, `tree`, `find`, `wc`, `head`, `tail`, `stat`, `df`, `mkfs.vfat`, `hexdump`, `neofetch`, `uname`, `free`, `uptime`, `top`, `ps`, `pstree`, `kill`, `dmesg`, `netstat`, `ifconfig`, `ping`, `traceroute`, `curl`, `ssh`, `tts`, `alsamixer`, `sensors`, `rustinfo`, `chacha20`, `sha3sum`, `base64`, `cryptobench`, `fdisk`, `rfilter`, `dcache`, `watchdog`, `jsonquery`, `subinfo`, `subi`, `subpower`, `subbench`, `subquote`, `cppinfo`, `cpptest`, `snake`, and more.
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---
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## 🏛️ Comprehensive Architecture
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```text
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+------------------------------------------------------------------------------------+
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| USERLAND & SYSTEM SUITE |
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| Interactive Shell | GNU Nano | Snake Game | Script Runner (sh) | LazyBox (85+ Apps)|
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| Micro HTTP Server | SSH 2.0 Daemon | Service Manager (systemctl) | Syslog Engine |
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+------------------------------------------------------------------------------------+
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| SUB LANGUAGE IN-KERNEL VM & MODULES |
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| subi Interpreter | OS Signature | CPU Power Governor | Recursive Math Benchmark |
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+------------------------------------------------------------------------------------+
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| FREESTANDING C++17 OOP KERNEL ENGINE |
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| Virtual Method Dispatch | RAII | Polymorphism | Telemetry Classes | Templates |
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+------------------------------------------------------------------------------------+
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| RUST-FOR-SUB-OS MEMORY-SAFE SUBSYSTEM |
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| ChaCha20 CSPRNG | SHA3-256 Keccak | AES-128 | Base64 | GPT/MBR | NetFilter Matcher|
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| VFS DCache Table | Kernel Health Watchdog | Zero-Copy JSON | Hardware Sensors |
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+------------------------------------------------------------------------------------+
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| VIRTUAL FILE SYSTEM LAYER (VFS) |
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| vfs_namei | RAMFS (/) | /dev (devfs) | /proc (procfs) | /sys (sysfs) | FAT32 | ext2|
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+------------------------------------------------------------------------------------+
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| NAMESPACES, INTER-PROCESS COMMUNICATION & ASYNC I/O ENGINE |
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| PID/UTS Isolation | Pipes | Message Queues | Shared Memory | Semaphores | io_uring|
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+------------------------------------------------------------------------------------+
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| CORE KERNEL SERVICES, SECURITY & TRACING |
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| Preemptive Scheduler | Fast Syscalls | Dynamic Modules | eBPF Virtual Machine |
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| LSM POSIX Capabilities | X.509 Keyring | Workqueues | Telemetry & Kernel Tracer |
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+------------------------------------------------------------------------------------+
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| NETWORKING, NETFILTER FIREWALL & SOUND ARCHITECTURE |
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| Ethernet | ARP | IPv4 | ICMP | UDP | TCP | DHCP | DNS | Sockets | NetFilter FW |
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| Embedded HTTP Server (8080) | SSH Server (2222) | Intel HDA | AC'97 | Formant TTS |
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+------------------------------------------------------------------------------------+
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| DEVICE DRIVER TREE |
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| NVMe PCIe SSD | AHCI SATA | ATA IDE | VirtIO-Blk | Ramdisk (/dev/ram0) |
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| Intel E1000 NIC | RTL8139 NIC | VirtIO-Net | USB 3.0 xHCI | HWMON Sensors |
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| Bochs VBE Display | 2D Canvas | VGA / TTY1-4 | 16550 Serial | PL011 UART |
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+------------------------------------------------------------------------------------+
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| HARDWARE ABSTRACTION LAYER (HAL) |
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| x86_64 (AMD64/PML4) | aarch64 (ARMv8-A/GICv2/MMU) | armv8i (AArch32/Section MMU) |
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+------------------------------------------------------------------------------------+
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```
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---
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## 🚀 Quick Start Guide
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### 1. Prerequisites
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Install the standard build essentials, cross-compilers, and Rust toolchain:
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```bash
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# Ubuntu / Debian
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sudo apt update
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sudo apt install build-essential g++ nasm qemu-system-x86 qemu-system-arm \
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gcc-aarch64-linux-gnu binutils-aarch64-linux-gnu \
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gcc-arm-linux-gnueabihf binutils-arm-linux-gnueabihf \
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rustc cargo dialog python3
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```
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---
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### 2. Linux-Style TUI Configuration
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Launch the interactive Kconfig configurator:
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```bash
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make configure
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```
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*(Also available via `make menuconfig`)*
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#### Fast Architecture Presets:
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```bash
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make x86_64_defconfig # Configure for x86_64 (Intel / AMD 64-Bit)
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make aarch64_defconfig # Configure for 64-bit ARM (Cortex-A57)
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make armv8i_defconfig # Configure for 32-bit ARM (Cortex-A15)
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```
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---
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### 3. Compilation & Live Emulation
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#### Target: `x86_64` (Default)
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```bash
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make x86_64_defconfig
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make
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make run
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```
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*Port forwardings automatically configured in QEMU:*
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- **SSH Server**: `ssh root@localhost -p 2222` (Password: `root`)
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- **HTTP REST API**: `http://localhost:8080/api/status`
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#### Target: `aarch64` (ARMv8-A 64-Bit)
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```bash
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make aarch64_defconfig
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make ARCH=aarch64
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make run ARCH=aarch64
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```
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#### Target: `armv8i` (ARM32 / AArch32)
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```bash
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make armv8i_defconfig
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make ARCH=armv8i
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make run ARCH=armv8i
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```
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#### Graphical Desktop Environment
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SUB-OS boots straight into the desktop. Pass `nogui`, `text`, `emergency` or
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`single` on the kernel command line to go directly to the kernel TTY instead;
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from inside the desktop, `Esc` (or Start -> Exit to Kernel TTY) drops to the
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same shell.
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The display mode is set with `video=WIDTHxHEIGHT` on the kernel command line
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(default `1280x720`, 16:9). Both the desktop and the framebuffer console adapt
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to whatever mode is active.
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```bash
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make run-gui # Windowed, aspect-preserving scaling
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make run-fullscreen # Fullscreen without stretching
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make run-vnc # Headless: VNC server on localhost:5900
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```
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---
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## 🧰 LazyBox Command Matrix (85+ Utilities)
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| Category | Commands Included |
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|---|---|
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| **Core & Shell** | `lazybox`, `sh`, `echo`, `env`, `export`, `whoami`, `id`, `date`, `cal`, `jsonquery`, `subi` |
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| **Filesystem & Search** | `nano`, `ls`, `cat`, `touch`, `mkdir`, `rm`, `cp`, `pwd`, `cd`, `tree`, `find`, `wc`, `head`, `tail`, `stat`, `df`, `mkfs.vfat`, `grep`, `hexdump`, `dcache` |
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| **Networking & Routing** | `ifconfig`, `ping`, `traceroute`, `arp`, `dhclient`, `nslookup`, `dnscache`, `netstat`, `iptables`, `rfilter`, `httpd`, `sshd`, `curl`, `wget`, `ssh`, `e1000e` |
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| **Hardware & Storage** | `lspci`, `lsdev`, `lsblk`, `fdisk`, `hdparm`, `sensors`, `speaker`, `beep`, `mouse`, `alsamixer`, `tts`, `virtinfo`, `gpuinfo`, `cpufreq` |
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| **Security & Cryptography** | `su`, `passwd`, `useradd`, `certcheck`, `capsh`, `ipcs`, `chacha20`, `sha3sum`, `base64`, `aead`, `cryptobench` |
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| **SUB Language & System** | `subinfo`, `subpower`, `subbench`, `subquote`, `pstree`, `kill`, `shm`, `readelf`, `buddyinfo`, `tscinfo`, `systemctl`, `service`, `crontab`, `logger`, `logread`, `watchdog`, `rustinfo`, `cppinfo`, `cpptest`, `cppdevs`, `cppbench` |
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| **Entertainment & Games** | `snake`, `matrix`, `calc`, `vtart` |
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| **Kernel & Tracing** | `lsmod`, `insmod`, `rmmod`, `slabinfo`, `trace`, `unshare`, `io_uring_test` |
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| **Diagnostics & Metrics**| `neofetch`, `uname`, `free`, `uptime`, `top`, `htop`, `ps`, `dmesg`, `vmstat`, `iostat` |
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| **System Control & GUI** | `clear`, `help`, `sleep`, `reboot`, `shutdown`, `poweroff`, `tty`, `startx`, `gui`, `desktop` |
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||
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||
---
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||
|
||
## 📦 Official Release
|
||
|
||
Download precompiled kernel binaries and bootable disk images from GitHub:
|
||
👉 **[SUB-OS v0.0.1-beta Release](https://github.com/subhobhai943/SUB-OS/releases/tag/v0.0.1-beta)**
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||
|
||
---
|
||
|
||
## 📄 License
|
||
|
||
SUB-OS is distributed under the open-source **MIT License**. See [`LICENSE`](LICENSE) for details.
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