No code changes -- investigation/verification only. Injected a raw SGR
escape sequence over the serial socket at the ok> prompt (composed from
EMIT + ." since no FORTH word emits a literal ESC byte + text
directly): 27 EMIT ." [95mCOLOR-TEST" 27 EMIT ." [39m", bright magenta
(the p>=90&&p<=97 branch in apply_sgr()), a third SGR code path
distinct from 4.4h's already-verified truecolor prompt.
Screendump on all three architectures confirms COLOR-TEST renders in
bright magenta via the 4.4j-retargeted TTF draw call, proving the SGR
parser and the new glyph backend work together end-to-end, not just
independently. First screendump evidence ever captured for
aarch64/riscv64 in this document -- every prior screendump item was
amd64-only with that gap explicitly accepted; incidentally closed here
via the QEMU monitor screendump command against each arch's own
display device (ramfb for aarch64/riscv64). Both confirmed booting at
800x600.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
font_8x16.c keeps rendering everything through and including POST;
TTF-TEXT's rasterizer takes over at the interactive REPL boundary
(sk_repl()) via a new runtime mode switch, vt100_enable_ttf()
(console_fb_enable_ttf() wrapper), not a compile-time swap -- both
backends coexist in the same binary since boot/POST must stay
font_8x16.c per this item's own done-when.
TTF-TEXT (the FORTH word) isn't directly callable from vt100.c -- VM
stack arguments, different call shape than a one-glyph cell draw. Used
hal/ttf.c's VM-independent primitives directly instead (same rasterizer
TTF-TEXT itself calls underneath), added as a native C helper in
vt100.c. Lazily loads fonts:JetBrainsMono-Regular.ttf and kmallocs a
96-slot raster cache (covers all 95 printable ASCII, no eviction
thrash) on first switch.
Cell geometry changes at the switch (mode-aware cell_w()/cell_h()):
provisional 12x24 TTF cell (600/1000em * 20px = 12px exactly, using
4.4i's confirmed-uniform hmtx advance width) vs font_8x16's fixed 8x16
-- cols/rows re-derived and screen cleared at the switch point, same as
vt100_init() itself does. Final REPL text size is 4.4m's decision, not
this item's.
Also fixes the second call site 4.4i flagged: erase_line_range() now
uses one fb_fill_rect() instead of a per-cell font_8x16-specific blank
glyph draw, consistent with erase_display(2)'s full-screen case.
Three-arch verified: amd64/aarch64/riscv64 all reach ok>, POST
Failed: 0, identical dict-hashes. amd64 screendump shows real
proportional JetBrains Mono letterforms on the REPL tail, visibly
distinct from every prior font_8x16 screenshot.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
console.c's emit_prefix() now wraps [VMName] (brackets included) in
FABRIC.md 4.4's locked orange (0xFFA500), and repl.c's two "ok> "
call sites send FABRIC.md 4.4's locked cyan (0x55FFFF), both as real
SGR escape sequences through the existing font_8x16.c/vt100.c pipeline
-- 4.4b already established this needs no dependency on TTF-TEXT/4.4j.
Sent through both raw_putc() (serial) and vt100_putc() (framebuffer),
matching the existing dual-path pattern, so an ANSI-aware serial
terminal renders the same colors as the framebuffer.
Three-arch verified: amd64/aarch64/riscv64 all reach ok>, POST
Failed: 0, identical dict-hashes. Color applies correctly to any VM
name (confirmed via the [Hermes]-prefixed PARITY:BIRTH line in all
three logs, not just [Hera]). amd64 screendump confirms the rendered
colors directly.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Moves the console_fb_init() call in kernel_main.c from after
capsule_birth_mama() to before it, so the fleet-birth/self-test
transcript (Hermes x2, Artemis births, Stadium self-tests -- currently
serial-only) is also framebuffer-visible, not just the small post-birth
tail.
4.5f's -O2 experiment already showed this doesn't hang under
optimization, just costs roughly 12x more boot-time heartbeat ticks
(one-shot, paid only during fleet birth, never repeated at runtime).
Captain Bob's call: worth it, since the serial log was never the
problem -- this is about the same transcript also reaching a real
screen.
Three-arch verified: amd64/aarch64/riscv64 all reach ok>, POST
Failed: 0, identical dict-hashes across all three. amd64 screendump
confirms the framebuffer now carries the full transcript.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Uncommitted experiment (code reverted after capture, per Captain Bob):
moved console_fb_init() before capsule_birth_mama() in kernel_main.c,
amd64 only. At -O2 the boot completes cleanly and reaches ok> well
inside a 300s bound, versus the indefinite stall previously seen at
-O0. Real cost: ~12x more heartbeat ticks during boot from the extra
framebuffer scroll volume -- not free, but not a hang.
Screendump confirms the actual point of 4.4g: the framebuffer now
carries the full HADES/ECW/Stadium/self-test transcript, not just the
small post-birth tail.
This informs 4.4g's open reorder decision, it doesn't make it -- 4.5f
stays unchecked (single-arch feasibility check only, not the three-arch
acceptance pass its own done-when requires).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
FABRIC.md item 4.5d Finding 4: lidt()'s inline asm used a register-only
("r") constraint on the idtr pointer, never telling GCC the asm
dereferences the pointee. At -O2 this let the compiler treat the
256-entry idt[] population loop and idtr_desc's field writes as dead
stores and eliminate them entirely, loading IDTR from uninitialized
stack instead of the real table -- a #GP on the first APIC timer tick
that happened to land on garbage. Same bug class as the earlier
muldiv64 fix (b43e51a): an inline-asm constraint too weak for what the
asm actually touches, invisible at -O0, live at -O2.
Fixed by switching to a memory operand ("m"(*idtr_desc)), matching how
Linux's own load_idt() is written. aarch64/riscv64 checked for the same
pattern -- neither has it, both install their vector/trap tables
entirely in hand-written .S.
Verified: all three architectures boot clean to ok>, POST Failed: 0,
identical dict-hashes across all three under -O2, zero new warnings
vs an -O0 baseline (amd64 3040/3040, aarch64 3041/3041 serial,
riscv64 3037/3037). -O2/-U_FORTIFY_SOURCE landed permanently in
COMMON_CFLAGS.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Computed the loader's true runtime relocation delta to correctly correlate
fault addresses (the running image is starkernel_loader.efi, a relocated
PE, not the separately-linked starkernel_kernel.elf assumed at first).
Fault RIP decodes to log_message()'s entry -- coincidental, not causal,
since it's called on nearly every HADES dispatch during word registration.
Used QEMU's monitor for -d exec,int tracing. Late-start tracing (stop right
before the danger zone to keep trace size down) failed twice -- the window
between a detectable checkpoint and the crash is shorter than host-side
reaction latency. Fell back to full-boot tracing from -S (~2.7GB per
attempt, not committed). That trace shows an unremarkable, normal-looking
repeating three-block loop immediately before the fault, then "Servicing
hardware INT=0x20" (APIC_TIMER_VECTOR) with IDT already showing limit=0 at
that instant.
Ruled out a second illegitimate lidt call (only one call site exists
anywhere, one-time M4 boot setup; searched the trace for any later
execution of that address range and found none). Not yet established: the
actual corrupting write. Documented two remaining explanations (earlier
silent corruption vs. a genuine TCG artifact) and that pinpointing the
exact instruction needs GDB-level single-stepping, a bigger tooling step
than attempted this session.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Used QEMU-side instrumentation (-d int tracing, plus a working chardev-based
monitor -- the older bareword -monitor syntax silently fails on QEMU
10.2.1) as directed. The PM Timer "stall" was never a hang: it was a #DE
divide error cascading to a triple fault, which -no-reboot converts into a
silent clean QEMU exit -- indistinguishable from a hang without tracing,
and why arch_relax() (solving a hang that didn't exist) had no effect.
Root cause and fix documented in full (also see commit b43e51a).
With the fix, amd64 boot at -O2 now proceeds far past the original stall --
through capsule birth and into Hermes's word registration -- before hitting
a second, different fault (Finding 4): a direct #GP at IDT index 32
(APIC_TIMER_VECTOR), not yet root-caused. Same silent-triple-fault-exit
shape, so this was very likely bundled into "the hang" before tracing
distinguished the two separate bugs.
-O2 reverted again (uncommitted); muldiv64's fix is kept, real and
independently verified at unchanged -O0 on all three architectures.
Routine three-arch artifacts from this session's verification runs
included.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Follow-up probing narrowed Finding 3's behavior (inconsistent stall point
run-to-run: sometimes reaches iters=1000/delta=951 before stopping,
sometimes never gets past iters=0 even after a 400-second bounded wait) but
didn't pin the mechanism.
Tested the strongest available hypothesis: single-threaded TCG scheduling
starvation from an -O2-tightened spin loop, based on a real precedent --
calibrate_apic_timer() (apic.c) already calls arch_relax() every iteration
of its own spin-wait; calibrate_tsc_with_pmtimer() never had it. Added the
same call, matching that precedent exactly. Result: no change, same exact
stall point on a fresh 60-second bounded wait. Reverted.
Stopping here per this document's own §25.0 rule 5 -- root-causing further
needs either deeper TCG/QEMU internals knowledge or a different diagnostic
approach (host-side instrumentation) than another guess-and-check pass.
Makefile.starkernel and timer.c both back to committed -O0 state, confirmed
booting clean.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Finding 2 (putc/getc) fixed via shim.c backfill (previous commit). With
both Finding 1 (-U_FORTIFY_SOURCE) and Finding 2 fixed, amd64 links clean
at -O2 -- rigorously confirmed zero new warnings by diffing normalized
warning text between -O0 and -O2 builds (empty diff, ~3040 pre-existing
warnings in vendored code unchanged).
New Finding 3, not fixed, now blocking: amd64 boot stalls for minutes
inside calibrate_tsc_with_pmtimer() (timer.c:560-589) at -O2 -- a
mainline busy-wait loop reading the ACPI PM Timer via genuinely-volatile
inl() until 1000 real ticks elapse, bounded by a 5M-iteration timeout. A
one-shot diagnostic probe (reverted after capture) caught exactly one
checkpoint in 55 seconds of observation, then nothing -- not yet
root-caused whether this is the 5M-iteration timeout itself taking several
minutes to exhaust under -O2, or a genuine non-terminating condition.
Makefile.starkernel reverted to -O0 again; nothing broken landed in
history. Routine artifacts from this session's boot attempts included.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Marks 4.5b done with the verification record (three log dirs, all reaching
[Hera] ok> at unchanged -O0). Routine artifacts from this session's
three-arch runs: capsules/BLOCK_MAP.md, disk/artemis.img, DOE CSVs, QEMU
serial logs.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Attempted 4.4g's console_fb_init() reorder twice this session: once bare,
once with the fb_scroll_rows() volatile fix applied. Both stalled boot
indefinitely (12,000+ lines logged, still running after 3 minutes vs. a
normal few-second boot) instead of completing. Root cause traced past the
scroll fix to Makefile.starkernel building the kernel at -O0 -- no
optimization flag has ever been configured there, verified against the
file's full git history (17 commits, only ever one unrelated host-tool -O2
line). Both the kernel's own vendored hosted Makefile and the standalone
StarForth repo's Makefile default to -O2 (up to -O3/-flto on faster
targets); Makefile.starkernel was written fresh for the bare-metal target
and never got that ladder.
Documented as new item 4.6: enabling optimization is not a safe drop-in
change on its own. Found one confirmed, isolated correctness hazard first --
TimeTrustState.ticks (timer.h:90) is written directly in ISR context on all
three architectures (heartbeat.c:163) and read directly by mainline
(heartbeat.c:200-202, including a busy-wait in kernel_main.c:880) without
being volatile, unlike every other ISR-shared global checked
(g_spurious_count, g_plic_claim_count, g_pending_counter/g_pending_valid/
g_adaptive_period_ns are all correctly volatile already). Reverted the
console_fb_init() reorder itself (uncommitted, so a plain git restore) --
4.4g stays open pending 4.6.
Both the reorder attempts' logs (stalled, never reached ok>) and this
session's routine three-arch artifacts (capsules/BLOCK_MAP.md, disk/
artemis.img, DOE CSV) are committed as audit trail per CLAUDE.md.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Three-arch acceptance boot (amd64/aarch64/riscv64) clean, all reaching
[Hera] ok>, plus amd64 screendump evidence for each item -- checking off
4.4c (console_fb_init wiring), 4.4d ([VMName] prefix reaching the
framebuffer), 4.4e (\r/\n fix), and 4.4f (glyph-flip fix, previous commit).
Screendump verification itself stays amd64-only pending future
aarch64/riscv64 screendump tooling; Captain Bob accepted that gap as
non-blocking for these checkboxes.
4.4g reframed from "anomaly, not root-caused" to a design decision: traced
the missing hundreds of lines of boot output to console_fb_init() running
after capsule_birth_mama() (which births the whole Tripod fleet and their
self-tests) rather than before it, so that output is serial-only by
construction -- not a scroll/CSI-parser bug. Left unchecked pending a call
on whether to reorder console_fb_init() earlier in boot.
Also commits routine artifacts from this session's three-arch runs:
capsules/BLOCK_MAP.md (regenerated manifest), disk/artemis.img (Artemis
writes on every boot), DOE CSVs, and the corresponding QEMU serial logs.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.4a complete.
Removed the manually-built <Name>)ok>/zuse)ok> prompt suffix from
sk_repl_step()/sk_repl_run() -- console.c's console_putc() already emits a
"[VMName] " prefix at line-start, so the old code was double-printing the
name for non-Hera VMs ("[Hermes] Hermes)ok> "). Now prints only "ok> " and
lets the existing prefix supply the bracket. emergency_console/zuse_session
security semantics unchanged, display-only. Verified: all three
architectures boot live to "[Hera] ok>" (logs/20260811-073408 amd64,
logs/20260811-073448 aarch64, logs/20260811-073542 riscv64).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.3.7f complete. No code changes -- ttf.c/ttf.h/
ttf_words.c unchanged since 4.3.7e; this is verification only, same
posture as 4.3.6g.
Three-arch acceptance boot clean (standard make ARCH=<arch> clean qemu,
run in order, one at a time): all three reached [Hera] ok> cleanly,
logs committed under logs/20260810-231553(amd64)/231640(aarch64)/
231739(riscv64).
One screendump per architecture, identical TTF-TEXT command sequence
(S" Hi 4.3.7e!" 200 200 28 16777215 TTF-TEXT) via monitor-socket +
serial-injection, same pattern as 4.3.7c/e. All three show the string
rendered legibly with correct mixed-case/digit/punctuation glyphs and
identical monospace spacing.
TrueType rendering (4.3.7-4.3.7f) is now complete, adjunct to the
stroke font per §27.7 decision #4. Stopping here before scoping REPL
wiring (M8), per this item's own posture matching 4.3.6g.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.3.6g complete. Fixed the cross-arch bug found
while first attempting this checkpoint: aarch64 and riscv64 both boot
an 800x600 ramfb device (confirmed empirically for both, not assumed),
against amd64's 1280x800 GOP framebuffer -- the original verification
grid's Y coordinates ran off the top of the smaller screens. Rebuilt
the grid to fit 800x600, safe on amd64's larger screen too.
All 113 glyphs confirmed legible and correctly positioned on all three
architectures, one screendump each, from the identical FORTH command
sequence. No code changes -- font.4th/fabric.4th are unchanged since
4.3.6f; this is verification only.
Three-arch acceptance boot clean, Stadium conservation unchanged.
Stroke font (4.3.6-4.3.6g) is now complete. Per this item's own
posture, stopping here before scoping REPL wiring (M8) -- 4.3.7
(TrueType, adjunct) is the scoped-but-not-started next work.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.3.6f complete. TEXT ( c-addr u x y size color -- )
walks a UTF-8 byte string, decoding one codepoint at a time via
DECODE-UTF8, drawing each via DRAW-GLYPH, and accumulating the cursor
X by the glyph's em-advance scaled to pixels. Uses 2>R/2R> to stash
the DECODE-UTF8 remainder off the data stack while DRAW-GLYPH's args
are pushed.
Defined in font.4th, not fabric.4th, so its compiled DRAW-GLYPH call
binds to the real definition, not fabric.4th's 4.3.6b placeholder --
same early-binding constraint as DISPATCH-GLYPH itself.
Verified live: a string mixing ASCII, Latin-1 (degree sign), and
General Punctuation (em dash) renders correctly in one TEXT call with
proportional spacing, no overlap.
Three-arch acceptance boot clean, Stadium conservation unchanged.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.3.6e complete. Optional capsule, not wired into
the boot chain, overriding DISPATCH-UPPER's codepoint 65 (G-A) with a
marked alternate glyph while every other letter falls through to
font.4th's originals unchanged.
Corrects §27.6.5: redefining the DISPATCH-* bucket word alone is not
enough, since DISPATCH-GLYPH/DRAW-GLYPH are themselves compiled early
against font.4th's own dispatch words (same early-binding finding as
4.3.6c, one layer up). Verified both ways: the partial override (bucket
word only) left DRAW-GLYPH still drawing the original glyph; redefining
DISPATCH-GLYPH/DRAW-GLYPH too made the override take effect.
Three-arch acceptance boot clean, Stadium conservation unchanged.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.3.6d complete. Both capsules now EXEC via
Hera's Mama IDENTITY capsule (init.4th block 2049), loading on every
normal boot instead of manual serial injection. Verified by booting
with zero injected commands and calling DRAW-GLYPH directly.
Three-arch acceptance boot clean, Stadium conservation unchanged.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.3.6c complete. Digits, upper/lowercase, ASCII
punctuation, Latin-1 Supplement, and General Punctuation, each a
stroke-drawing word in the 4.3.6 em-square convention.
Corrected mid-build: the first pass used G-LINE only, missing that
CIRCLE/ARC/ELLIPSE already existed (4.3.3b). Reworked all round shapes
to use them via new em-square-aware wrappers (G-CIRCLE/G-ARC/G-ELLIPSE/
EM-R, fabric.4th 5000-5002), bounded to quarter/half/three-quarter/
full sweeps to avoid unbounded per-glyph angle tuning. font.4th also
redefines DISPATCH-GLYPH/DRAW-GLYPH themselves, not just the six
DISPATCH-* bucket words, since fabric.4th's originals were compiled
early against the 4.3.6b placeholders (CASE early-binding, §27.6.5).
Three-arch acceptance boot clean, Stadium conservation unchanged.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.3.6b complete.
capsules/fabric.4th blocks 4921-4924: DISPATCH-GLYPH routing via
WITHIN to six bucket words (DISPATCH-DIGIT/-UPPER/-LOWER/
-ASCII-PUNCT/-LATIN1/-GENPUNCT), TOFU fallback, DRAW-GLYPH. Buckets
carry one placeholder stroke word each (G-TEST-*), not the real
113-glyph set -- that's item 4.3.6c's scope, deliberately deferred.
Also: merged two lines in block 4920 (DECODE-UTF8) to fit mkcapsule's
real 64-char x 16-line block limit once a trailing blank separator
line is counted against it -- mechanical reformat, re-verified via a
DECODE-UTF8 regression check (65/176/8212, unchanged).
Verified live on amd64: one representative codepoint per bucket plus
one out-of-range codepoint, all seven DRAW-GLYPH results matched
expected exactly (400/600/450/250/550/700/500-TOFU). Three-arch
acceptance boot clean, Stadium conservation unaffected.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.3.6a complete.
capsules/fabric.4th blocks 4918-4920: UTF8-SEQ-LEN/UTF8-CONT? verbatim
from §27.6.2, DECODE-UTF8 dispatching to four UTF8-ASSEMBLE-N helpers
(1/2/3/4-byte). Factored into helpers after the single-word draft hit
mkcapsule's real 64-char x 16-line block limit. Verified live on
amd64: a 6-byte test buffer (ASCII + deg-sign + em-dash) decoded to
65/176/8212 across three sequential calls, exact match against
hand-computed codepoints, buffer fully consumed. Three-arch acceptance
boot clean, Stadium conservation unaffected.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.3.6 complete.
capsules/fabric.4th blocks 4916-4917: EM-UNITS, GOX/GOY/GSIZE/GCOLOR,
EM-X/EM-Y/G-LINE per §27.6.1, scaling/translating em-square strokes
into CART-PLOT screen coordinates via */. Verified live on amd64 via
a temporary probe (built, run once, reverted): two G-LINE test shapes
at GSIZE 100 and GSIZE 50, one leg each exercising a negative em-y
value chosen to hit */'s truncate-toward-zero behaviour, not a
multiple of EM-UNITS. Screendump pixel-bbox extraction matched
hand-calculated raster coordinates exactly on both shapes. Three-arch
acceptance boot clean, Stadium conservation unaffected
(resident_sum=43691 reservoir=21845 sum=65536 on all three).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.3.5f complete. Keyboard-input slice done.
New KEY-EVENT ( -- keycode pressed -1 | 0 ) converges amd64's i8042,
riscv64's and aarch64's virtio-keyboard-pci behind one shape. Translation
needed is minimal: XT Set-1 make codes and Linux input keycodes are
numerically identical across the standard 84-key block (a documented
historical property of the Linux input subsystem, confirmed against this
host's own headers and this tree's own prior live observations), so amd64
needs two lines, riscv64/aarch64 need none. Verified live with a real
keypress on all three architectures: identical "-1 1 30" output everywhere.
Three-arch acceptance boot clean.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.3.5e complete.
Extended virtio_input.c with a GIC-routed interrupt path alongside 4.3.5c's
PLIC one -- same capability walk, feature negotiation, eventq handling
(confirming §27.5.1's prediction that these items would share most of the
driver). aarch64_irq_handler() dispatches to virtio_input_isr() before its
EOIR write, same claim-dispatch-complete ordering riscv64 uses. Verified
with a real QEMU sendkey keypress: exact KEY_A/press match, two real
interrupts serviced, identical result to riscv64. Found (not fixed) an
unrelated pre-existing bug: BYE's cold-reset path faults on aarch64,
discovered incidentally since nobody had exercised it from a monitored
session before. Three-arch acceptance boot clean.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.3.5d complete.
New apic_spi_enable(intid) generalizes item 0.6's PPI-only sequence to one
explicit SPI (IPRIORITYR/ISENABLER/ITARGETSR, ICFGR read-checked not
written). Verified via a software-pended SPI (GICD_ISPENDR, no device
needed) through the existing generic IRQ dispatch, which needed no changes.
Found and fixed a real bug during verification: PSTATE.I is still set at
apic_init()'s point in boot, so the first self-test run correctly latched
but never took the interrupt. Self-test code reverted after capturing
evidence -- interrupts.c has zero net diff, only apic_spi_enable() remains,
unused until 4.3.5e. Three-arch acceptance boot clean.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.3.5c complete.
Amended from a nonexistent MMIO transport to PCI (matching the board's
actual virtio-blk-pci precedent). New virtio-input driver: eventq with
pre-posted buffers, PLIC source computed at runtime from PCI slot/pin
(derived live from this host's QEMU riscv64 DTB), mandatory ISR-status
read, PCI interrupt-disable-bit check. New VKBD-EVENT/VKBD-DEBUG FORTH
words. Verified with a real QEMU sendkey keypress: exact KEY_A/press
match, two real interrupts serviced, zero exceptions. Three-arch
acceptance boot clean.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.3.5b complete.
sie.SEIE enabled, PLIC threshold/claim/complete wired into the trap
handler. Verified with a UART-loopback synthetic interrupt (PLIC has no
software set-pending register, unlike GICv2): claim_count=1, last_irq=10,
IIR confirms genuine receive-data cause, byte matched exactly. Self-test
code run once for evidence then fully reverted, per Captain Bob's ruling;
only the permanent substrate remains, no source enabled by default.
Three-arch acceptance boot clean, zero exceptions.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.3.5a complete.
Firmware (EDK2 RISC-V) leaves Sv57 paging active at kernel entry with an
identity mapping that has at least one confirmed hole (PLIC threshold
register). Verified live before acting: satp.MODE/PPN and __kernel_start's
address confirmed identity mapping; switched to Bare mode (csrw satp, x0 +
sfence.vma) in arch_early_init(), ahead of pmm_init()/vmm_init().
Three-arch acceptance boot clean, zero exceptions; riscv64's PLIC_THRESHOLD
write now survives (PLIC driver code itself lands separately with 4.3.5b).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Live-probed GICD_ITARGETSR before starting 4.3.5d/e; survived cleanly,
unlike riscv64's PLIC (4.3.5a). Decoded QEMU's own virt DTB for the PCI
slot->SPI interrupt-map routing table and closed-form formula. Amended
4.3.5d's circular acceptance criterion to a synthetic GICD_ISPENDR probe
(mirrors 4.3.5b's fix for the same problem), and wrote the full 4.3.5e
virtio-input execution plan: device ID 0x1052, the real virtio_input_event
struct, the mandatory ISR-status read, and the pci_enable() interrupt-
disable-bit gap.
Log: logs/20260808-093228/aarch64/.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Three-arch acceptance run (amd64/aarch64/riscv64) after adding -device
ramfb to aarch64/riscv64, plus the interactive GOP-verification and cube
sessions on both.
Three-arch acceptance run (amd64/aarch64/riscv64) plus the interactive
sessions used to test LINE/CIRCLE/ARC/ELLIPSE, the block-span test, and
verify the Q.TO-INT fix.
Three-arch acceptance run (amd64/aarch64/riscv64) plus the interactive
fabric.4th verification sessions used to test CART-PLOT and find the
VARIABLE alignment bug.
Serial logs and DoE run CSVs from this session's acceptance-test boots
(the amd64 GOT-indirect-addressing fix and item 4.2's Hermes-native-
on-the-Stadium work) -- committed per the standing convention that
these are audit artifacts, not scratch output.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Migrates Hermes's message/channel lifecycle onto the Stadium's unified
heat/capacity economy: MSG-ALLOC/FREE-NODE and CH-ALLOC/FREE-NODE now
route entirely through stadium_admit()/stadium_evict(), replacing the
old local free-list + independent heat-field mechanism. Eight
kernel-only STADIUM-* FORTH primitives (ADMIT, EVICT, RES@, RES-PULL,
RES-PUSH, HEAT@, HEAT!, WORD-HEAT), VM.stadium_vm_id threaded through
all three vm_core.c dispatch sites (replacing item 4.1's hardcoded
vm_uuid_hera()), and the stadium_owner[idx] fix so evict-credit lands
in the VM that actually admitted a patron, not whoever owned cell 0.
This session's own contribution, on top of that pre-existing
implementation: found and fixed two bugs blocking the item's own K≡1.0
conservation self-check (HERMES-K was reading 0, not 65536):
- Q.SLOT admission-heat fix (capsules/hermes/init.4th): MSG-SEND/
CH-ACCEPT admitted with Q.1 (the entire fleet-wide "1.0" unit) per
item, a leftover from before the Stadium migration when each
message/channel had its own unconstrained heat field. Instantly
drained the shared, finite reservoir.
- Reservoir floor for word-execution admission (stadium_words.c):
stadium_word_dispatch() (item 4.1) pulls STADIUM_WORD_HEAT_QUANTUM on
every word dispatch, not just first admission -- exhausts a VM's
entire reservoir in ~32 dispatches, starving any application-level
economy sharing that VM's reservoir before it gets a chance to pull
anything. word_dispatch_pull() now clamps word-execution's own pulls
to leave a Q48_ONE/3 floor (same fair-share figure COMMON-CH's own
floor already uses); application-level pulls are unaffected.
- STADIUM-WORD-HEAT primitive + stadium_words_resident_heat(): the
floor deliberately leaves word-execution residents holding real
heat, invisible to HERMES-K's original formula (MSG+CH+reservoir,
no term for word patrons). Adding this term closes K to exactly
65536 on all three architectures.
Also rules on two open scope questions in FABRIC.md: MBR-ALLOC/
MBR-FREE-NODE stay off the Stadium (membership records have no heat
field, never did -- the acceptance bullet's inclusion of them was a
completeness gesture predating a check of the actual layout), and
records the effort number (12 implementation files, +759/-120 lines).
Verified: all three architectures boot clean, full self-test passes,
Stadium conservation closes exactly (resident_sum + reservoir =
Q48_ONE) at both the C/Stadium level and the FORTH-level HERMES-K
check.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.1a complete.
New prerequisite item, found while scoping 4.2: no quota-granting mechanism
existed at all. Adds stadium_grant_quota(new_vm_id, from_vm_id) -- a
one-time initial grant at birth, distinct from item 1.3's still-unbuilt
recurring capacity-transfer arbitration. Splits the donor's free list evenly
by cell count, reassigns stadium_owner[] for every moved cell, and grants
the new VM a fresh Q48_ONE reservoir (not a split of the donor's -- per-VM
conservation, same pattern as Hera's own boot grant). Wired into every baby
VM's birth in capsule_birth.c.
Verified via a boot-time self-test in kernel_main.c using a synthetic
identity (not the real UUID pool, not a real capsule birth -- item 0.1's
Hera-alone pruning stays intact). All three architectures booted to ok> with
identical output: grant OK, Hera reservoir=0 (already fully committed to
resident words, correctly unchanged), test-vm reservoir=65536 (fresh
Q48_ONE). dict_hash identical across all three and unchanged from item 4.1's
baseline (0x3d4e1daf289da94f) -- confirms no dictionary word was added.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 4.1 complete.
Replaces the round-robin hotwords cache with Stadium density-ranked
admission/eviction on the kernel side, via the §17.7 reservoir mechanism and a
kernel-side word_id -> cell_index map (no DictEntry change, dict_hash
untouched). Adds stadium_birth_hera() to close the cell-0 panic hazard,
STADIUM_WORD_HEAT_QUANTUM/STADIUM_WORD_COOL_RATE_Q48 Kconfig knobs (flagged
untuned), and a stadium_word_forget() FORGET coherence hook to close a
recycled-word_id aliasing gap.
Verified: all five hotwords_cache_* call sites in dictionary_management.c
bypassed under __STARKERNEL__; word dispatch feeds the Stadium at all three
vm_core.c physics_execution_heat_increment() sites; hosted make unaffected;
all three architectures booted to ok> with matching dict_hash
(0x3d4e1daf289da94f) and matching conservation stats (promotions=354
evictions=0, resident_sum=65536 reservoir=0 sum=65536).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 3.8 complete. Added after starting item 4.1
surfaced the need to thread a vm_id into stadium_admit()'s new quota
parameter; Captain Bob ruled UUID/GUID rather than keeping the
narrower uint32_t.
New VMUuid type (vm_uuid.h/vm_uuid.c): two uint64_t halves, RFC-4122-
shaped for logging. Not real randomness -- checked directly against
QEMU 10.2.1's actual CPU feature set: amd64 RDRAND and riscv64 Zkr are
both real, available features here; aarch64 has no RNG property on any
CPU model including "max" (verified exhaustively via QMP
query-cpu-model-expansion). Captain Bob ruled a uniform fallback
across all three ISAs rather than a per-architecture split.
Fallback is a deterministic PRNG (splitmix64) seeded from the Mama
capsule's content hash, pre-filling a 16-entry FIFO pool at boot and
refilling with another batch of the same stream when exhausted --
exactly the shape requested. Same capsule booted twice produces the
same id sequence, preserving the dict_hash reproducibility this
session has relied on throughout.
Hera keeps a fixed, reserved all-zero id, not drawn from the pool --
capsule_birth.c uses vm_id == 0 as a load-bearing sentinel in three
places (KILL protection x2, fleet heat-fanout parent-chain
terminator), found by reading before writing any code.
Two real sentinel-collision bugs caught before shipping, same class as
STADIUM_CONTAINS_NONE: vm_uuid_none() (all-ones, not all-zero) for
"not yet assigned"/"no VM" placeholders; confirmed item 3.7's quota
table already used an in_use boolean rather than a vm_id sentinel, so
no second collision was actually possible there -- the dead,
never-referenced STADIUM_QUOTA_SLOT_EMPTY macro was removed.
Blast radius larger than first scoped, flagged mid-work rather than
silently absorbed: capsule_vm_physics.c/.h (the fleet heat-transfer
layer item 2.1 modified earlier this session) has its own vm_id-keyed
node table and walks parent_vm_id chains through the same identity
space, so it needed the same change, plus its callers in
mama_forth_words.c and sk_vm_bootstrap.c.
One live FORTH word contract changed, by explicit ruling: CAPSULE-BIRTH
was ( capsule-id -- vm-id ), a single cell -- can't hold 128 bits.
Captain Bob picked pushing two cells ("there is doubles support in the
FORTH std word set anyway"): ( capsule-id -- vm-id-hi vm-id-lo ).
MAMA-VM-ID changed the same way: ( -- 0 0 ).
Verified: full (not standalone-file) kernel rebuild to catch cross-file
breakage given the size of this change -- it surfaced the
capsule_vm_physics.c blast radius a narrower check would have missed.
Three-architecture boot (amd64, aarch64, riscv64), all reaching ok>
with identical dict_hash=0x3d4e1daf289da94f matching the item-3.7
baseline.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 3.7 complete. Added to §25.4 after starting item
4.1 surfaced it as an unbuilt prerequisite -- 3.6's earlier "Phase 3
core complete" claim is corrected in this same commit.
StadiumVMQuota table (size STADIUM_MAX_VM_COUNT, linearly searched by
vm_id -- capsule_birth.c's vm_id is monotonic and never reused, so it
cannot index a table directly, and a 4-entry scan costs nothing). New
per-cell stadium_owner byte array records which quota a cell belongs
to, needed so eviction returns a freed cell to the correct VM's list
and so eviction search stays scoped to the evicting VM's own residents
(quota isolation).
Free-list linkage reuses each cell's `link` field as a next-free
pointer while unresident -- link is documented only as generic "index
into the Stadium, not a pointer," so this is a repurposing, not a
header change. Does not answer the separate, still-open question of
which field carries a multi-cell patron's first continuation-cell
index; item 3.5's mass != 1 refusal stands exactly as it was.
Boot-time: every cell chained into one list in ascending index order,
granted whole to vm_id 0 (Hera), the only VM that exists. Ascending
order preserves item 3.6's "Hera is patron zero" invariant once real
birth-wiring lands.
stadium_admit()'s signature changed to take vm_id -- a change to code
shipped in item 3.5, amended there. Pops the calling VM's free-list
head first (O(1)); only falls back to a same-VM-scoped eviction search
if empty.
Caught a real bug before the boot run: the header zero-fill on
eviction (and the initial free-list build) both left contains == 0,
but 0 is Hera's valid index -- the same collision item 3.1's
STADIUM_CONTAINS_NONE fix addressed, recurring at a new site. Fixed by
explicitly setting contains = STADIUM_CONTAINS_NONE at both free-list
sites.
Explicitly out of scope, reported not invented: granting quota to any
VM other than Hera is capacity arbitration (item 1.3 left "how much
moves per transfer" open). stadium_owner is set once at boot and never
rewritten, so quota_slot_for_vm() refuses every vm_id != 0 permanently
until item 4.2 adds the grant path and owner-array writes.
Verified: three-architecture boot (amd64, aarch64, riscv64), all
reaching ok> with identical dict_hash=0x3d4e1daf289da94f matching the
item-3.6 baseline.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 3.6 complete. Phase 3 (§25.4) core is now done:
items 3.1-3.6 all closed.
stadium_evict() now panics via sk_hal_panic() if a resident cell 0
(Hera, patron zero by construction of §6's boot order) is ever
selected for eviction. Placement is deliberate: the check runs before
the pin/contains refusal checks, not after -- if it ran after, a
wrongly-cleared pin would let the ordinary refusal path quietly return
-1 instead of ever reaching the panic, defeating the point of a check
that's supposed to be independent of pin holding.
Per §20.5 #3's explicit wording, not implemented as a filter:
stadium_admit()'s least-dense search is unchanged, still relying on
the general pin skip from item 3.5. Adding a second filter there would
have done exactly what that section warns against ("filtering hides
the bug, asserting reports it").
The panic path is, and will remain, unexercised by the acceptance
mechanism: sk_hal_panic() halts the machine, and triggering it
deliberately is incompatible with the three-arch boot being this
project's sole acceptance test. Correctness rests on the placement
argument, not a test -- same honesty precedent as items 3.4 and 3.5's
other unexercised paths.
Verified: three-architecture boot (amd64, aarch64, riscv64), all
reaching ok> with identical dict_hash=0x3d4e1daf289da94f matching the
item-3.5 baseline.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 3.5 complete.
stadium_admit(candidate) places into an unused cell if one exists (no
comparison needed), otherwise finds the least-dense resident -- skipping
pinned and contains-gated patrons, which are never eviction candidates
-- and evicts it only if the candidate is strictly denser, per §19.3.
stadium_evict(cell_index) dispatches the departing patron's behaviour
before clearing its slot, per §17.2.
Caught a real bug before it ran: the first draft used contains == 0 to
mean "holds nothing," but cell index 0 is a valid index (Hera, item
3.6). Fixed with a proper sentinel, STADIUM_CONTAINS_NONE (UINT32_MAX).
A second-pass review found mass was not accounted for: both functions
handled exactly one cell regardless of the candidate's stated mass,
which leaks cells on eviction of any mass > 1 patron and breaks
capacity conservation. Fixed by refusing any candidate with mass != 1
-- multi-cell patrons need the per-VM free lists item 3.2 already
deferred (§22.3), not built here.
Documented, not fixed: the discriminator bitmap can't distinguish free
from continuation cells, so the free-cell scan reads continuation-cell
payload bytes under the header layout -- latent since nothing creates
continuation cells yet, and the mass != 1 refusal keeps it provably
latent. Superseded by the free list when it exists.
Unexercised at runtime: nothing calls either function yet (no real
patron kind is wired to the Stadium). No self-test added -- filling
~74,000+ cells to reach the eviction-on-full branch was judged
impractical, following item 2.2's own precedent for its unexercised
fleet-full path.
Verified: three-architecture boot (amd64, aarch64, riscv64), all
reaching ok> with identical dict_hash=0x3d4e1daf289da94f matching the
item-3.4 baseline.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 3.4 complete.
stadium_density(cell_index) reads a header's heat and mass and returns
heat / mass -- a division on demand from fields already stored in the
cell, matching §19.3's "read, not computed by a scheduler" literally.
Stays valid Q48.16 without a special fixed-point routine, since heat
is already Q48.16 and mass is a plain integer divisor.
mass == 0 and an out-of-range cell_index both return 0 rather than
dividing by zero -- an empty or never-admitted slot has no footprint
to be dense within.
Deliberately not built here, per the item's own wording: finding the
densest or least-dense resident (§19.3's admission/eviction
comparison) is item 3.5's scope, not this one's. Nothing calls
stadium_density() yet either.
Verified: three-architecture boot (amd64, aarch64, riscv64), all
reaching ok> with identical dict_hash=0x3d4e1daf289da94f matching the
item-3.3 baseline.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 3.3 complete.
StadiumBehaviour (stadium.h) enumerates exactly the four tags §18.3
already names -- MIGRATE, DELIVER, EXPIRE, COOL -- mapped from §17.1's
patron table: blocks->MIGRATE, messages->DELIVER, ACLs->EXPIRE, words
and VMs both->COOL. Nothing invented; the tag set and mapping were
already in the document.
stadium_dispatch(cell_index, behaviour) dispatches on the tag only,
never asks what kind of patron departed. Handlers are stubs -- the
real actions belong to subsystems not yet migrated onto the Stadium
(Phase 4). Nothing calls stadium_dispatch() yet; item 3.5 is its first
consumer.
The switch is exhaustive with no default case, making §13's "closed
enumeration, fixed at build time" a compiler-enforced property under
this project's -Wall -Werror rather than just prose. Verified live:
temporarily deleted the COOL case, rebuild failed with
error: enumeration value 'STADIUM_BEHAVIOUR_COOL' not handled in
switch [-Werror=switch], restored it, confirmed clean again.
The header's behaviour field stays uint8_t, not the enum type itself,
since C does not guarantee an enum's underlying type and that field's
offset is load-bearing for item 3.1's validated 64-byte layout.
Verified: three-architecture boot (amd64, aarch64, riscv64), all
reaching ok> with identical dict_hash=0x3d4e1daf289da94f matching the
item-3.2 baseline.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 3.2 complete.
stadium_boot_init() (src/starkernel/vm/stadium.c) sizes the global
cell array at boot from a real memory-budget query rather than a
hardcoded count: pmm_get_stats().free_bytes at the point of
allocation, times the new STADIUM_MEMORY_PERCENT Kconfig symbol
(default 1%), rounded down to whole 64-byte cells. Matches §17.6's
position (b) literally. Also allocates the header/continuation
discriminator bitmap item 3.1 declared but did not allocate. Both are
kmalloc'd and explicitly zero-filled (kmalloc does not zero).
Called from kernel_main.c immediately before sk_vm_bootstrap_parity(),
i.e. before any VM exists (§6). Failure is soft -- logs and continues,
does not halt boot -- matching the existing precedent one line below
it (VM bootstrap parity failure does the same).
Added a "Stadium: N cells (M KB)" boot console line at the allocation
site so the acceptance logs are evidence the array was actually
allocated, not just that the kernel still boots -- the same blind spot
item 3.1's uncompiled-header gap exposed.
Verified: three-architecture boot (amd64, aarch64, riscv64), all
reaching ok> with identical dict_hash=0x3d4e1daf289da94f matching the
item-3.1 baseline, and the Stadium boot line confirmed present in all
three serial logs (amd64: 74234 cells/4639 KB, aarch64: 161329
cells/10083 KB, riscv64: 76122 cells/4757 KB).
Not built here, reported per §25.0 rule 3: per-VM free lists (§22.3)
-- granted when Hera assigns quota, not this item's scope.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 3.1 re-closed after reopening.
Items 1.1 and 1.4's resolutions both explicitly named this item as
where their Kconfig symbols would be implemented, but 3.1's own stated
scope never mentioned them, so the first close missed both:
- STADIUM_CONTAINS_DEPTH_MAX (default 5) -- item 1.1's contains-chain
depth cap. No consumer yet; reap-gating enforcement is item 3.5.
- STADIUM_CAPACITY_TICK (default 1000) -- item 1.4's capacity
arbitration cadence in virtual ticks. No consumer yet; capacity
arbitration itself is not on the punch list.
Both added following STADIUM_MAX_VM_COUNT's exact pattern:
Kconfig.kernel entry, Makefile.starkernel kconfig_int +
VM_FEATURE_FLAG_VARS forwarding, starforth_config.h fallback default.
stadium.h now includes starforth_config.h and carries two more
C99-portable compile-time checks proving both symbols are defined and
sane, same discipline as the byte-count checks. Declaration only --
not inventing the consuming logic to close this out early.
Verified: three-architecture boot (amd64, aarch64, riscv64), all
reaching ok> with identical dict_hash=0x3d4e1daf289da94f, re-run after
the reopening.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Punch list §25 item 3.1 complete.
Defines StadiumPatronHeader and StadiumContinuationCell in new
include/starkernel/vm/stadium.h, unioned as StadiumCell per §3's
closed two-valued union. src/starkernel/vm/stadium.c added to
Makefile.starkernel's LOADER_EXTRA_SRCS/KERNEL_EXTRA_SRCS so the
header's compile-time size checks are actually compiled, not merely
included by something that never builds.
Discriminator ruled an external side bitmap (Captain Bob), not a
header field -- amended into §3 and §23.3 before this code was
written. Item 3.1 declares the bitmap's purpose/indexing in a comment
only; allocating it is item 3.2's scope.
Both cell shapes counted for real at exactly 64 bytes with zero
compiler-inserted padding (three C99-portable negative-array-size
assertions -- no _Static_assert, this project targets C99). Header
matches §23.3's original 32+32 split unchanged, since the
discriminator moving outside the cell left nothing to compete for that
space. Continuation cell matches item 1.12's 4+60 figure unchanged for
the same reason.
Verified the size assertion is actually live: broke it to 63,
confirmed the build failed with the expected negative-array-size
error, restored it, confirmed a clean compile.
Verified: three-architecture boot (amd64, aarch64, riscv64), all
reaching ok> with identical dict_hash=0x3d4e1daf289da94f matching the
item-2.2 baseline. Confirmed stadium.o present in both obj/loader/vm
and obj/kernel/vm post-build on amd64, closing the gap the item-2.2 WIP
exposed (an uncompiled header proves nothing).
Left open, not fabricated: §23.4 #2 ("does a typical message fit in
one cell") is unanswerable today -- no message patron struct exists
anywhere in this tree yet.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Wires the birth-refusal check into capsule_birth_baby(): calls
vm_registry_live_count() (added in the prior WIP commit) between
capsule validation and vm_registry_alloc(), returning the new
CAPSULE_RUN_ERR_FLEET_FULL and logging via
capsule_parity_log_birth_failed() before any EMBRYO registry slot is
consumed.
Also fixes a gap in that WIP commit: STADIUM_MAX_VM_COUNT was only
ever defined via a Kconfig .config-driven -D flag, with no fallback
default the way every sibling knob in starforth_config.h has -- a
build with no .config present (this one) failed with the macro
undeclared. Added STARFORTH_CONFIG_STADIUM_MAX_VM_COUNT_DEFAULT (4,
matching Kconfig.kernel) following the existing HEARTBEAT_INFERENCE_FREQUENCY
pattern exactly.
All three architectures boot clean to ok> with dict_hash=0x3d4e1daf289da94f,
matching the item-0.10/2.1 baseline. FABRIC.md item 2.2 checked off.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
