A PS-X EXE header may carry KUSEG addresses (Alien Resurrection SLUS-00633,
Kula World SCES-01000); the BIOS then runs the program at KUSEG PCs, so its
links, EPCs and I-cache tags are KUSEG. The parser folded such a header to
KSEG0, so the whole program compiled for a segment it never runs in, and
the dispatch lookup matched any segment by physical address
(docs/SEGMENT_AWARE_CODE.md §3.2, §5.3, §5.5).
- EXE parser: keeps the header's addresses. link_segment() is the load
address's segment; the load address and entry must share it and lie in
the 8 MiB RAM window of KUSEG, KSEG0 or KSEG1 (KSEG1 compiles as an
uncached home segment). phys_load_address()/contains_phys() do byte
addressing; the BSS overlap check and the text_size bound are physical.
- function_analysis: the three JAL scans take the target's top bits from
the delay slot's PC instead of assuming KSEG0 (unchanged for KSEG0).
- Seeds are range-checked by physical address. A seed in the link segment
is an entry (0x000100E4 was silently dropped before). A seed for the same
bytes in another segment asks for a segment variant (§5.4): it is listed
in a WARNING, never folded into the home body. Seeds outside the image are
counted. The producer_range, cross_call_allow and hosted_interior
directives have no variant form: a foreign spelling is refused with the
link-segment one instead of a bare "invalid" error.
- Config code sites that are matched exactly (widescreen and cull sites,
mod hooks, hot/data-shard funcs, the VSync-query function and its
event-horizon return PCs, persisted options) and name the image's bytes
in another segment are refused with the spelling that matches, since they
would now match nothing. Kinds matched by physical address (byte patches,
the full-word-guarded cull keep/angle/aspect-cone and signed-X-bound
sites, dome call sites) reach the same bytes in any spelling and are not
refused. Overlay compiles are exempt until PR E.
- tools/collect_game_misses.py wrote every dirty-RAM miss as a KSEG0 seed,
which a KUSEG-linked image now reports instead of compiling. It writes
them in the link segment (--segment, --game-toml, or a segmented text
range; it refuses to guess from a physical one) and adds the
segment_misses rows at their full PC.
- Dispatch source moves to game_dispatch_emitter.cpp. The lookup indexes
the physical word, then requires row.addr == addr; a second row for one
word is an error until variants share the table. psx_game_address_in_text
stays physical, so a segment miss takes the clean-text-miss path (the
previous commit records it).
For a KSEG0 title the game C is byte-identical; its dispatch file changes
only in psx_game_find_entry (the exact-PC compare) and its comment.
Tests:
- segment_aware_codegen closes link-segment, fetch-tag-segment,
irq-resume-segment, resume-pc-segment, store-pc-segment,
home-seed-accepted, alias-fetch-coherence and segment-miss; they stay as
regression guards, and resume-pc-segment now also checks the dispatch
rows' keys and resume PCs.
- kuseg_dispatch_lookup: KUSEG rows, names and baked PCs; aliases miss while
text stays physical; variant seeds reported; a function reached only by
jal and a SaveState-style continuation are discovered in a KUSEG image
(kills the two discovery scans reverted to KSEG0; the third, the
invalid-JAL data heuristic, reads the same bits either way); mixed-segment
headers rejected; a KSEG1 image charged per instruction; foreign config
sites refused; the RAM-mirror contract as before.
- kuseg_dispatch_lookup also compiles the lookup's binary-search form (a
table spanning 2 MiB or more) and queries every segment's alias of each
row; refuses a KSEG0 event-horizon site and KSEG0 seeds directives with
their KUSEG spelling; accepts a KSEG0 signed_x_bound site and applies it.
- emitter_runtime_pc_test: the dispatch rows follow runtime_pc() and keep
the compile identity in func_ names (kills B's two surviving mutants: 76
and 12 failing checks); two rows on one physical word are an error.
- collect_game_misses (new, tools/tests): link-segment seeds from each
source, segment misses at their full PC, no guessing, no duplicates,
against a fake server using the runtime's own summary row format.
- reachable_discovery_test: the parser keeps KUSEG, accepts KSEG1, rejects
mixed segments and non-RAM load addresses.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Matt Stanley