The §9.1 "scattered .bss commons" exclusion class (Phase 8 → P31) is closed 3/3. New
tools/psyq_bss_split.py (own ELF32 REL reader/writer) cuts an object's packed .bss into
per-base NOBITS pieces: bases derived from the game bytes per HI16/LO16 pair, references
walked in offset order into single-base runs, cuts snapped to symbol starts (the linker
scattered SYMBOLS), symbols moved, a LOCAL section symbol per piece inserted, relocs
retargeted with the addend rewritten in the immediates, self-diffed. It runs inside the one
prepare step shared by psyq_link.link_object / psyq_link_region.build_region /
psyq_integrate.integrate (prepare_object before classify), re-derived every build.
GS_001.o was certified "5 interleaved bases, NOT splittable" by the S77 probe, which grouped
by BASE; by RUN it is six symbol-aligned pieces. All seven cuts across the three objects are
confirmed by the other objects' by-name recoveries (_que 0x800C5510, _svm_sreg_buf
0x800B9B58, PSDBASEX/CLIP2/PSDBASEY/POSITION/GsDRAWENV). R39 negative control: 235 placed
objects across 9 curated dirs, 0 refusals, exactly 3 splits (a libcd .bss+size end pointer
refused the first build → reference problems are fatal only when a split is needed).
Wiring: yaml 800c→libgpu2, sgap_6→sgap_6+snd12, gsgap3→libgs8 (comments rewritten);
LIBGPU_ELF := .run/obj40/libgpu (curated libgpu_used retired); libgs 34 objs/8 blocks
(make_libgs.sh +GS_001); snd 63/12 (make_snd_used.py exclusions 4→3). src/800c.c and
src/gsgap3.c removed (Sony code hand-matched as REAL/verbatim), sgap_6.c keeps only
func_8003FA54; splat-emitted libgpu2.c/libgs8.c/snd12.c stubs for the no-SDK fallback.
Verified: main 143dbb89f34491258bbc27810d0a12ec8b43a8dd WITH the SDK objects and WITHOUT
them from a fresh extract; make tools-health OK; R22 fleet clean extract-all 212/212 +
check-all 213/213. Metrics: main REAL 886→839, LINKED 1,040→1,150, VERBATIM 85→29, stubs 29
(unchanged); game-code weighted 91.1% (40,895/44,870) — both terms lost the 3,667 SDK ins;
the remainder is still exactly the 3,975-ins open-stub sum. Verbatim manifest --update
200→33 rows (subtractive). Docs: cookbook §489 (+index), psyq-worklist rows + "S78 task #4",
SETUP S79 R21 table, decision-log S79 addendum, accelerators S79, CURRENT_PHASE S79 FINAL 🛑.
- libspu and libsnd interleave in 0x3A444..0x4239C (the 800-subseg tail), so they link
as ONE combined region rather than two tangled passes
- NEW tools/make_snd_used.py: build the curated combined dir — merge both libs by vram,
pick the byte-matching object per aliased address (link_object), exclude 4 addresses
that don't reconcile in-region (kept as byte-identical stubs):
0x3C438 S_R/S_W, 0x3D424 S_GRMDT/FB/T — scattered-.bss commons, cross-object (§9.1)
0x3D94C S_IH/UT_RON — false placement (inside libsnd SSSTART.o)
0x3FA64 VM_F (237 ins) — scattered-.bss commons (the one real loss)
- subsegs via gen_lib_subsegs.py (9 snd blocks + 8 sgap game/excluded-stub gaps);
integrate window 0x3A444..0x4239C; region byte-verified 60/60
- src/800.c trimmed at [0x3A444,0x4239C): kept 732 items < 0x3A444 (ALL matched C +
game + the deferred SSGM stub preserved), 0 real-C moved
- dual byte-gate PASS: 143dbb89 with and without the sound objects
- LINKED 710 -> 935 (+225); REAL still 43; byte-identical 48.66% (nearly half the EXE)
- deferred: SSGM.o @0x1BD80 (isolated, matched-C region, 8 ins)
Drew T