Breenix OS

Rust-based x86_64 Operating System targeting POSIX compliance

Overall Development Progress
POSIX Compliance: ~45% • Phase 8.5 of 15
53%
You Are Here→ Process Layer & Threading
Memory Syscall Roadmap
Strategic path to full memory management POSIX compliance
brk ✓ Complete
Phase 1: mmap/munmap
High Priority

Required for: shared libraries, malloc implementations, memory-mapped I/O. ✓ All 54 boot stages pass!

Phase 2: Memory Protection
Medium Priority

Required for: JIT compilation, W^X enforcement, stack guards, efficient fork(). Build on Phase 1 VMA infrastructure.

Row 1

Foundation Layer

Complete
Boot & Init
100% complete
Core Kernel
100% complete
Interrupts
100% complete
Devices
100% complete
Row 2

Process Layer

In Progress
Processes
80% complete
Memory Mgmt
90% complete
Syscalls
70% complete
Threading
50% complete
Row 3

Higher Services

Not Started
Filesystem
15% complete
IPC
0% complete
Userland
10% complete
Network
0% complete
Next Actionable Items
  • Filesystem: Implement ext2 filesystem and read/write syscalls (15% → 50%)
  • Signals: Implement SIGTERM, SIGKILL, sigaction, and signal handlers (0% → 60%)
  • File Operations: Add open, close, read (sync), dup, dup2 syscalls (13% → 60%)
  • IPC: Implement pipes for inter-process communication (0% → 50%)
  • Memory: Implement Copy-on-Write for fork optimization (90% → 100%)
  • Processes: Add waitpid and exit_group syscalls (80% → 90%)
Development Phases
Journey from boot to POSIX compliance
0
Pre-boot
1
Boot
2
Kernel Init
3
Interrupts
4
Devices
5
Memory
6
Processes
7
Syscalls
8
Threading
9
Filesystem
10
IPC
11
Userland
12
Network
13
Drivers
14
POSIX Compat
15
Stable
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