Markus Maiwald
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ee594df8a7
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feat(rumpk): Phase 4 - NPL Loader
THE PLATFORM HAS PURPOSE
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Rumpk now has a payload loading system: NPL (Nexus Payload).
OUTPUT
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[NPL] ✅ Verification PASSED
[NPL] Executing payload...
[NPL] ✅ Payload returned!
[NPL] ✅ Bad sig rejected
NPL FORMAT (128-byte header)
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- Magic: \x7fNPL (4 bytes)
- Version: 1 (1 byte)
- Arch: 0xAA=ARM64, 0xEE=x86_64, 0x55=RISC-V (1 byte)
- Flags: 2 bytes
- Signature: 64 bytes (Ed25519 placeholder)
- Body Size: 8 bytes
- Reserved: 48 bytes
IMPLEMENTATION
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core/npl.nim:
- NPLHeader struct (packed, 128 bytes)
- loadNpl() - validates magic, version, arch, signature
- buildTestPayload() - creates test NPL in memory
- Signature verification (mock: rejects 0xFF)
TESTS VERIFIED
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1. Valid payload: Loads and executes RET instruction
2. Bad signature: Correctly rejected (0xFF in sig[0])
3. Cross-arch: Would reject wrong arch code
PHASE SUMMARY
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✅ Phase 1: Documentation (SPEC-008/009/010)
✅ Phase 2: Pure Zig libc (Freestanding Doctrine)
✅ Phase 3: Cooperative Fibers (Ping Pong)
✅ Phase 4: NPL Loader (with mock signature)
→ Phase 4.2: Ed25519 verification (Monocypher)
→ Phase 5: VisionFive 2 RISC-V hardware
The unikernel can now load and execute signed payloads.
Next: Real Ed25519 verification.
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2025-12-31 20:18:47 +01:00 |