Robert Allan JamesandClaude Sonnet 5
736627510b
kernel_main on riscv64 ran directly on EDK2's UEFI boot-time stack, with no dedicated stack switch — amd64 has always had a kernel_entry.S trampoline for exactly this reason (its own comment: "the FORTH interpreter + DOE experiment loop can easily exceed that depth"). aarch64 happens to get away without one because its firmware's default stack is apparently larger, but that was never a guarantee. On riscv64 the VM bootstrap's call depth (27 word-registration modules -> physics/SSM init -> Tripod capsule birth) overflowed that small stack, corrupting a return address and producing a wild jump / page fault right after vm_init_with_host() returned — reproduced consistently across the 2026-08-01 DoE campaign logs. - src/starkernel/arch/riscv64/kernel_entry.S (new): RISC-V stack-switch trampoline mirroring amd64's, giving the kernel a dedicated 2 MiB BSS stack before anything deep runs. - kernel_main.c: riscv64 now builds kernel_main_impl (invoked via the trampoline) instead of kernel_main directly, same pattern as amd64. - Makefile.starkernel: wires the new file into the riscv64 build. - uefi_loader.c: RAW_LOG() was silently a no-op on every non-amd64 arch; added a real raw-UART writer for riscv64 (QEMU virt's uart8250 at MMIO 0x10000000) so existing loader diagnostics actually produce output. Verified: all three architectures boot clean to [Hera] ok> in the required order (amd64, aarch64, riscv64); logs and DoE CSVs from these runs included. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
experiments/
Design of Experiments (DoE) campaign data and analysis for the LithosAnanke kernel.
bare_metal/— the bare-metal DoE experiment: blind full-factorial 2⁴ runs measuring the L8 Jacquard mode selector's effect on the Steady-State Machine across amd64/aarch64/riscv64. Seeexperiments/bare_metal/README.mdfor the full directory layout (runs/,latest/,analysis/{charts,tables,report}).
Hosted-VM DoE campaigns (factorial/heartbeat/ablation studies) live under
docs/working/experiments/ instead — this top-level directory is
specifically the kernel/bare-metal side.