Robert Allan JamesandClaude Opus 5.5
56da55aba9
sk_vm_switch_entry() stops being the Stage-2 placeholder bounce and becomes every switch participant's own idle loop: it drains one of its own kernel-Hermes messages per pass, on its own native stack (driven by the drain's return value, so a non-consuming drain cannot spin), and when nothing is drained it marks the VM parked_idle and yields back. It is entirely OS-driven, with no VM-side yield word. sk_hermes_drain_checkpoint() gains a per-VM hermes_draining guard so a payload's own in-word checkpoint cannot drain a second message inside the first. Still inert in normal operation: nothing marks work until Stage C. Finding fixed here: amd64 sk_vm_switch_prime built the first-entry frame at top-56, entering with rsp 16-aligned instead of the SysV-required 8 mod 16, so the first aligned SSE spill in a callee took #GP (logs/20260923-142526, kept). It had been latent since SXXVIII Stage 2 because the placeholder never called anything. The frame is now at top-64 with a zeroed pad slot. aarch64 and riscv64 were already correct. Evidence: a temporary kernel_main probe (reverted, not in this commit) queued two messages to Hestia, the first calling a colon word, and switched into her. It passed on all three ISAs: 0 pending, parked_idle, depth 0, context saved on her own stack, SB-SEQ=12 (drained one at a time, not nested), ledger and stadium_conserved restored. Formal acceptance without the probe on all three ISAs: dict_hash identical and unchanged, zero UNKNOWN WORD or faults, and the live WIREBIND mint -> USE -> 1 2 + . -> 3 relay. FABRIC-3.8.md also records Captain Bob's rulings that no VM-side word ever gives up control and that multitasking is a compudynamic hybrid, and opens SS3.12 (VM frames for per-VM execution state). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
include/
Public headers for the hosted StarForth VM (src/). Kernel-only headers
live under include/starkernel/.
Core VM
vm.h— theVMstruct and all core types (DictEntry,DictPhysics, stacks, dictionary state); the central header most other files include.vm_api.h— external VM API surface.vm_host.h,vm_debug.h,startup.h,version.h— host integration, debug utilities, startup sequencing, version string.cli.h,repl.h,io.h,log.h— CLI parsing, REPL loop, I/O, logging.word_registry.h— word registration system shared by everysrc/word_source/*.cfile.compudynamics.h— the generic compudynamics module: tuning-word/config lookups (cd_tuning_word(),cd_tuning_vm()) consumed byssm_jacquard.c.
Memory / blocks
memory_management.h,dictionary_management.h— dictionary allocator and search.block_subsystem.h,blkcfg.h,blkio.h,blkio_factory.h— logical→ physical block mapper and pluggable block I/O backends (file/RAM).platform_alloc.h,platform_lock.h,platform_time.h— platform abstraction shims (hosted vs. kernel allocation/locking/timing).
Physics-driven adaptive runtime (7 feedback loops)
physics_runtime.h— main physics coordinator.physics_hotwords_cache.h— Loop #1, execution-heat hot-words cache.physics_metadata.h— per-wordDictPhysicsmetadata tracking.physics_pipelining_metrics.h— Loop #4, word-transition prediction.physics_execution_hooks.h— execution instrumentation hook points.rolling_window_of_truth.h,rolling_window_knobs.h— Loop #2 circular execution-history buffer and its tuning knobs.inference_engine.h— Loops #5/#6, window-width and decay-slope statistical inference.dictionary_heat_optimization.h— Loop #1 heat counters.ssm_jacquard.h— L8 Jacquard steady-state mode selector.doe_metrics.h— Design of Experiments (2^7 factorial) metrics.profiler.h— performance profiling hooks.
Arithmetic / codegen
q48_16.h— Q48.16 deterministic fixed-point arithmetic (used instead of IEEE-754 float specifically to keep cross-architecture behavior bit-identical).math_portable.h— portable math helpers.arch_detect.h,starforth_config.h— architecture detection and the build-flag fallback-default layer (used when a.cfile is compiled by hand withoutmake).vm_asm_opt.h,vm_asm_opt_arm64.h,vm_asm_opt_riscv64.h,vm_inner_interp_asm.h,vm_inner_interp_arm64.h,vm_inner_interp_riscv64.h— per-architecture assembler-optimized inner interpreter (USE_ASM_OPT=1).
See include/starkernel/README.md for the bare-metal kernel headers.