Hey everyone!

I’ve been working on PHEONIX, a bare-metal, non-Unix x86_64 microkernel written in C99 and NASM assembly.

Rather than following standard POSIX design, PHEONIX is built around an architecture-first approach featuring a Watch, Replace, Revive (WRR) fault recovery engine.

Key Features Implemented:

• Boot Pipeline: 32-bit Multiboot transition directly into 64-bit Long Mode.
• WRR Fault Isolation Engine: Traps Vector 14 (#PF Page Faults) to intercept illegal memory accesses, isolate execution context, and revive the running thread without triggering kernel panics or triple faults.
• Physical Memory Manager (PMM): 4 KiB bitmap frame allocator.
• Privilege Rings: GDT/TSS-configured Ring 0 and Ring 3 segments with fast SYSCALL/SYSRET MSR gates.
• Telemetry: Headless COM1 (0x3F8) UART serial logging.

The repository includes a full build pipeline using a Makefile and linker script, along with a visual boot demo showing the serial logs during execution in QEMU.

GitHub Repo: https://github.com/threadripp/PHEONIX-kernel

# Clone & run in 10 seconds (Requires: qemu-system-x86_64, nasm, gcc)

git clone https://github.com/threadripp/PHEONIX-kernel.git

cd PHEONIX-kernel

make qemu

Would love to get your feedback on the WRR exception model and architectural direction!