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4 Commits

Author SHA1 Message Date
Markus Maiwald 784ed4949e 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 0db7298edf feat(rumpk): Sovereign Ledger - VirtIO Block Driver & Persistence 
- Implemented 'virtio-block' driver (hal/virtio_block.zig) for raw sector I/O.
- Updated 'virtio_pci.zig' with dynamic I/O port allocation to resolve PCI conflicts.
- Integrated Block I/O commands (0x600/0x601) into Kernel and ION.
- Added 'dd' command to NipBox for testing read/write operations.
- Fixed input buffering bug in NipBox to support longer commands.
- Added documentation for Phase 10.
 2025-12-31 22:35:30 +01:00
Markus Maiwald 8f0eca7916 feat(rumpk): Phase 8 - The Summoning (ELF Loader) - 95% Complete 
## Major Features

### 1. Dynamic ELF64 Binary Loading
- Implemented ELF parser with full header validation (core/loader/elf.nim)
- Created kexec() loader supporting PT_LOAD segment mapping
- Added BSS initialization and data copying from VFS
- Assembly trampoline (rumpk_enter_userland) for userland entry

### 2. Syscall Infrastructure
- Added CMD_SYS_EXEC (0x400) for consciousness swapping
- Integrated exec command in NipBox shell
- Implemented syscall routing through command ring
- Added provenance tracking via SipHash

### 3. Test Binary & Build System
- Created hello.c test program for alien binary execution
- Automated compilation and initrd inclusion in build.sh
- Added libnexus.h header for standalone C programs

### 4. VFS Integration
- Implemented TarFS file cursor system for sequential reads
- Fixed infinite loop bug in cat command
- Added debug logging for VFS mount process

## Technical Improvements

### Memory Management
- Fixed input ring null pointer dereference
- Implemented CMD_ION_FREE syscall for packet reclamation
- Resolved memory leak in input/output pipeline
- Added FileHandle with persistent offset tracking

### ABI Stability
- Split kprint into 1-arg (Nim) and kwrite (C ABI)
- Fixed cstring conversion warnings across codebase
- Corrected RISC-V assembly (csrw sie, zero)

### Documentation
- Comprehensive Phase 8 documentation (docs/PHASE-8-ELF-LOADER.md)
- Detailed implementation notes and debugging status

## Current Status

✅ ELF parser, loader, and syscall infrastructure complete
✅ Test binary compiles and embeds in VFS
✅ Shell integration functional
🔧 Debugging command ring communication (syscall not reaching kernel)

## Files Changed

Core:
- core/loader.nim, core/loader/elf.nim (NEW)
- core/kernel.nim, core/ion.nim (syscall handling)
- core/fs/tar.nim (file cursor system)
- hal/arch/riscv64/switch.S (userland trampoline)

Userland:
- npl/nipbox/nipbox.nim (exec command)
- libs/membrane/libc_shim.zig (syscall implementation)
- libs/membrane/ion.zig (command ring API)

Build & Test:
- build.sh (hello.c compilation)
- rootfs/src/hello.c, rootfs/src/libnexus.h (NEW)
- apps/subject_entry.S (NEW)

## Next Steps

1. Debug SysTable and command ring communication
2. Verify ION fiber polling of chan_cmd
3. Test full ELF loading and execution flow
4. Add memory protection (future phase)

Co-authored-by: Forge <ai@voxisforge.dev>
 2025-12-31 20:18:49 +01:00
Markus Maiwald 09448bb812 feat(rumpk): Sovereign Core enhancements - NexShell IPC hardening & NipBox utility expansion 
- Improved NexShell signal integrity by consolidating ION packet transmission.
- Added 'ls' and enhanced 'matrix' control to NipBox (Sovereign Coreutils).
- Added emergency matrix override to NexShell kernel mode.
- Fixed 'command not found' errors caused by IPC fragmentation.
 2025-12-31 20:18:49 +01:00