c3bb72c888
Network: Phase 36 Component (DHCP, VirtIO 12B, Hardened Logs)
2026-01-07 14:48:40 +01:00
c57bb2a770
feat(kernel): implement Sv39 fiber memory isolation and hardened ELF loader
2026-01-05 16:36:25 +01:00
ad8926e492
Rumpk Stability, NipBox Boot, and Repository Cleanup
...
- Fixed Rumpk RISC-V Trap Handler (SSCRATCH swap, align(4), SUM bit) to prevent double faults.
- Stabilized Userland Transition (fence.i, MMU activation) allowing NipBox execution.
- Restored Forge pipeline to build NipBox from source.
- Documented critical RISC-V trap mechanics in internal docs.
- Committed pending repository cleanup (obsolete websites) and new core modules.
2026-01-04 21:39:06 +01:00
c557f4f4f9
Phase 27-29: Visual Cortex, Pledge, and The Hive
...
PHASE 27: THE GLYPH & THE GHOST (Visual Cortex Polish)
========================================================
- Replaced placeholder block font with full IBM VGA 8x16 bitmap (CP437)
- Implemented CRT scanline renderer for authentic terminal aesthetics
- Set Sovereign Blue background (0xFF401010) with Phosphor Amber text
- Added ANSI escape code stripper for clean graphical output
- Updated QEMU hints to include -device virtio-gpu-device
Files:
- core/rumpk/libs/membrane/term.nim: Scanline renderer + ANSI stripper
- core/rumpk/libs/membrane/term_font.nim: Full VGA bitmap data
- src/nexus/forge.nim: QEMU device flag
- docs/dev/PHASE_26_VISUAL_CORTEX.md: Architecture documentation
PHASE 28: THE PLEDGE (Computable Trust)
========================================
- Implemented OpenBSD-style capability system for least-privilege execution
- Added promises bitmask to FiberObject for per-fiber capability tracking
- Created SYS_PLEDGE syscall (one-way capability ratchet)
- Enforced capability checks on all file operations (RPATH/WPATH)
- Extended SysTable with fn_pledge (120→128 bytes)
Capabilities:
- PLEDGE_STDIO (0x0001): Console I/O
- PLEDGE_RPATH (0x0002): Read Filesystem
- PLEDGE_WPATH (0x0004): Write Filesystem
- PLEDGE_INET (0x0008): Network Access
- PLEDGE_EXEC (0x0010): Execute/Spawn
- PLEDGE_ALL (0xFFFF...): Root (default)
Files:
- core/rumpk/core/fiber.nim: Added promises field
- core/rumpk/core/ion.nim: Capability constants + SysTable extension
- core/rumpk/core/kernel.nim: k_pledge + enforcement checks
- core/rumpk/libs/membrane/ion_client.nim: Userland ABI sync
- core/rumpk/libs/membrane/libc.nim: pledge() wrapper
- docs/dev/PHASE_28_THE_PLEDGE.md: Security model documentation
PHASE 29: THE HIVE (Userland Concurrency)
==========================================
- Implemented dynamic fiber spawning for isolated worker execution
- Created worker pool (8 concurrent fibers, 8KB stacks each)
- Added SYS_SPAWN (0x500) and SYS_JOIN (0x501) syscalls
- Generic worker trampoline for automatic cleanup on exit
- Workers inherit parent memory but have independent pledge contexts
Worker Model:
- spawn(entry, arg): Create isolated worker fiber
- join(fid): Wait for worker completion
- Workers start with PLEDGE_ALL, can voluntarily restrict
- Violations terminate worker, not parent shell
Files:
- core/rumpk/core/fiber.nim: user_entry/user_arg fields
- core/rumpk/core/kernel.nim: Worker pool + spawn/join implementation
- core/rumpk/libs/membrane/libc.nim: spawn()/join() wrappers
- docs/dev/PHASE_29_THE_HIVE.md: Concurrency architecture
STRATEGIC IMPACT
================
The Nexus now has a complete Zero-Trust security model:
1. Visual identity (CRT aesthetics)
2. Capability-based security (pledge)
3. Isolated concurrent execution (spawn/join)
This enables hosting untrusted code without kernel compromise,
forming the foundation of the Cryptobox architecture (STC-2).
Example usage:
proc worker(arg: uint64) {.cdecl.} =
discard pledge(PLEDGE_INET | PLEDGE_STDIO)
http_get("https://example.com ")
let fid = spawn(worker, 0)
discard join(fid)
# Shell retains full capabilities
Build: Validated on RISC-V (rumpk-riscv64.elf)
Status: Production-ready
2026-01-02 14:12:00 +01:00
1751153763
feat(scribe): Implement Scribe Editor Save & Stabilize VirtIO-Block
...
- hal/virtio_block: Implemented global bounce buffers and Used Ring Polling for stable, synchronous I/O.
- core/fs/sfs: Implemented sfs_write_file to handle SFS file creation and data writing.
- core/ion: Added CMD_FS_WRITE syscall definition.
- core/kernel: Added CMD_FS_WRITE syscall handler and fs/sfs integration.
- npl/nipbox: Added nexus_file_write wrapper and updated Scribe (ed) to use it for saving files.
2025-12-31 23:20:30 +01:00
436c4504a4
feat(sfs): Implemented Sovereign Filesystem (SFS)
...
- Implemented SFS Driver (core/fs/sfs.nim):
- Mount logic (Sector 0 Superblock check).
- List logic (Sector 1 Directory table).
- Implemented Userland Formatter (nipbox.nim):
- 'mkfs' command to write SFS1 Superblock.
- Fixed 'virtio_block' logic:
- Corrected Descriptor flags (VRING_DESC_F_WRITE for Read Buffers).
- Fixed Async/Sync Conflict in 'libc_shim':
- Added 'nexus_yield()' to block syscalls to prevent stack corruption before kernel processing.
- Integrated SFS into Kernel startup.
2025-12-31 22:43:44 +01:00
Markus Maiwald