T

danielandClaude Fable 5 2f1010b02e fix: stream ELF program loading instead of buffering whole files

ElfLoad read the entire binary into one kernel heap allocation before
copying segments out. The heap grows through ReallocConsecutive, so a
40 MB cc1plus required 10k physically contiguous pages - effectively
impossible after boot with a 368 MB ramdisk module resident, and the
failed spawn surfaced as posix_spawnp ENOENT in the gcc driver.

The loader now reads the ELF header and program header table (bounded
at 64 entries), then copies each PT_LOAD page and the PT_TLS template
directly from the VFS into freshly mapped process pages. Peak kernel
memory per load drops from fileSize to one page regardless of binary
size. Boot-smoke verified: all userspace loads through this path.

Co-Authored-By: Claude Fable 5 <[email protected]>

2026-07-17 10:25:30 +02:00

.claude

feat: HTML man pages

2026-07-09 11:32:27 +02:00

.vscode

feat(vmm): Add Paging support

2025-04-17 21:54:25 +02:00

README.md

The Montauk Operating System

MontaukOS is an operating system written in modern C++. It runs on bare metal and supports various applications, including DOOM, a Wikipedia client, and standard desktop utilities.

Features

Modern preemptive multitasking kernel
Multi-user userspace with desktop environment and command line
PCI-e support and drivers for Intel GPU and e100e Ethernet for graphics and networking on real hardware
ACPI support with AML interpreter, including S3 sleep and ACPI shutdown
Support for USB including input devices (keyboard/mouse), along with PS/2 input support
Support for Intel High Definition (HDA) audio devices
Userspace and kernel audio support
Support for (some) Intel Bluetooth devices, userspace Bluetooth management app
Support for the GPT partition table
VFS using numbered drive identifiers with support for ext2 and FAT32 filesystems
Support for AHCI and NVMe SSD drives
Support for UEFI Runtime Services, including power management calls (shutdown/reboot)
Customizable desktop environment with 12+ graphical apps, including a terminal emulator, file manager, Wikipedia client, weather app, DOOM, and more
Modern icon pack (Flat Remix) used in desktop environment
Support for TrueType font, JPEG image, and SVG icon rendering
Networking including TCP/IP stack, UDP, DNS, DHCP and TLS via BearSSL
Command-line IRC client
Live viewable kernel log from GUI
Mandelbrot set renderer
PDF viewer app with full support for text (inc. baked-in TrueType fonts) and some graphics
Userspace Music app with support for MP3 and WAV files
2D game engine and demo game with fantasy tileset

Goal

The goal of the MontaukOS project is to create a modern and unique operating system that runs on both emulators and on real hardware. The kernel and included userspace applications are written in modern C++.

History and methodology

Development started in early 2025, as a hand-written toy kernel. The first published Git commit was on Feb 27, 2025. In early 2026, Claude Opus 4.6 began being used to accelerate development of the kernel and userspace.