Robert Allan James
28de700645
First real per-arch RNG backend, added to the v2.0.0 unified entry point in src/starkernel/rng/rng.c, #if-guarded to amd64: CPUID.01H:ECX[30] RDRAND detection + inline-asm rdrand draws feeding rdrand_fill() (whole-byte emission from the low end; a partial final draw is discarded -- throwing away entropy is always safe). Probe order honors the release policy: virtio-rng is tried first, so the QEMU path stays on virtio-rng unchanged; RDRAND is the fallback only real hardware (which has no virtio-rng device) reaches. QEMU-verified both ways on amd64: with virtio-rng present -> "rng: backend = virtio-rng" (unchanged); with virtio-rng absent and RDRAND exposed (-cpu max) -> "rng: backend = rdrand" + "entropy: ready" + Zuse attach confirmed. rdrand_fill()'s exact logic host-proven: fills 32-byte/16-byte buffers and yields differing draws run-to-run (non-deterministic). aarch64/riscv64 builds unaffected (guarded off). riscv64 Zkr and aarch64 peripheral-RNG backends remain parked for their real boards. FABRIC-3.md G.4 amd64 slice marked BUILT + QEMU-verified.
capsules/
FORTH personality files loaded by the VM at boot. A capsule is an immutable, content-addressed payload; its XXHash64 hash is its identity. Any mutation changes the hash and the birth protocol rejects the image.
Key files
| File | Type | Purpose |
|---|---|---|
init.4th |
(m) MAMA_INIT |
Default Mama VM personality — loaded at LBN 2048 |
ACL.4th |
user | Word-level ACL system; self-activating at boot |
zuse.4th |
user | Bootstrap superuser; loaded by ACL.4th |
doe.4th |
user | DoE workload words (EXEC-DOE) — opt-in |
init-0.4th … init-9.4th |
(p) |
Numbered personality variants |
init-l8-*.4th |
(p) |
L8 Jacquard mode variants (stable/volatile/diverse/temporal/transition/omni) |
hermes/init.4th |
(p) |
Hermes baby VM personality |
artemis/init.4th |
(p) |
Artemis baby VM personality |
Block namespace
Block ranges are shared across all loaded capsules — collisions cause silent word-definition overwrites.
| Range | Owner |
|---|---|
| 2048–2099 | init.4th |
| 2100–2199 | doe.4th |
| 3000–3999 | workload capsules |
| 4000+ | user-defined (ACL.4th, zuse.4th, …) |
Each block is limited to 1024 bytes. Verify with wc -c before committing.
See also
experiments/bare_metal/README.md— DoE protocols and block namespace rulesdocs/03-architecture/word-acl/DESIGN.md— ACL system designtools/mkcapsule.c— assembles capsules intocapsule_generated.c- Project root