DS game only ov041 general_2d_ui
containers: pack1gcmn, pack1gseled, pack1gseling (+6 more)
Header
Numeric metadata for this overlay as read from the overlay table at ROM
offset 0x8DE00 (per-entry stride 32 bytes). Function
counts, data-item counts, and the call-graph fan-out are from a Ghidra
11.3.1 headless auto-analysis pass.
Reading the binary
The overlay ships on the cart at file ID 41 under the BLZ code-LZ compression wrapper (the same backward-LZ scheme Nintendo uses for executable ARM9 code).
At load time the engine reads the overlay table entry at ROM offset
0x8DE00 + 41 * 0x20, allocates the destination
RAM region at 0x02155a00, decompresses
the body in-place (if compressed), and resolves any external
relocations.
To inspect this overlay outside the running game, decompress
overlay/overlay_041.bin with
ndspy.codeCompression.decompress() (Python ndspy library)
and load the resulting plaintext into Ghidra or
IDA at base address 0x02155a00. The
raw Ghidra auto-analysis dump used to populate this page lives at
notes/overlay_knowledgebase/raw/ov041.json;
the per-overlay descriptive markdown is at
notes/overlay_knowledgebase/ov041.md.
Embedded strings
4 UTF-16 LE strings live inside this overlay's compiled binary. These addresses are absolute (inside the overlay's RAM image after load). The text is stored as little-endian UTF-16 code units, NUL-terminated.
Container references
Distinct container basenames referenced by this overlay. Each is loaded via the content cache by passing the basename string to a lookup that resolves it to a file ID in the ROM's FAT. The path column shows the file's location in the clean extract, where resolved.
-
pack1gcmnβdata/pc_shop/redecoration/inner/pack1gcmn.lzs -
pack1gseledβdata/pc_shop/redecoration/inner/pack1gseled.lzs -
pack1gselingβdata/pc_shop/redecoration/inner/pack1gseling.lzs -
pack2βdata/pc_shop/redecoration/inner/pack2.lzs
Unresolved
These container basenames appeared in the overlay's string table but no file of that name was found in the clean extract. Most are false-positive ASCII matches (function names, register maps, fragments of other strings); a few may be containers that the overlay names but never actually opens. Listed for completeness.
-
pc_shop/redecoration/outer/pack1gcmn.lzsβ no matching container found in clean extract -
pc_shop/redecoration/outer/pack1gseled.lzsβ no matching container found in clean extract -
pc_shop/redecoration/outer/pack1gseling.lzsβ no matching container found in clean extract -
pc_shop/redecoration/outer/pack2.lzsβ no matching container found in clean extract -
pc_shop/redecoration/outer/pidtbl.lzsβ no matching container found in clean extract
Function list
Functions Ghidra auto-identified inside this overlay's RAM range.
Names prefixed FUN_ are auto-generated from the function's
entry address; size is in bytes; the "calls" column counts both
intra-overlay branches and external ARM9 call targets. The "strings"
column counts how many UTF-16 LE strings each function references.
Show all 28 functions
| # | Address | Size | Calls | Strings | Role hint |
|---|---|---|---|---|---|
| 1 | 0x02155a74 | 12 | 1 | 0 | trampoline / small helper |
| 2 | 0x02155a80 | 12 | 1 | 0 | trampoline / small helper |
| 3 | 0x02155a8c | 468 | 15 | 0 | code |
| 4 | 0x02156204 | 16 | 0 | 0 | trampoline / small helper |
| 5 | 0x02156214 | 1,146 | 57 | 0 | high-fan-out (likely dispatcher / setup) |
| 6 | 0x021566c0 | 904 | 35 | 12 | refs: pack1gcmn \| pack2 \| pack1gcmn \| pack1gseled \| pack1gseling \| pack1gcmn |
| 7 | 0x02156a7c | 48 | 2 | 0 | code |
| 8 | 0x02156aac | 660 | 24 | 12 | refs: pack2 \| pack1gcmn \| pack1gseled \| pack1gseling \| pack1gcmn \| pack1gseled |
| 9 | 0x02156d64 | 64 | 1 | 0 | code |
| 10 | 0x02156fe8 | 544 | 31 | 0 | high-fan-out (likely dispatcher / setup) |
| 11 | 0x0215723c | 1,070 | 65 | 0 | high-fan-out (likely dispatcher / setup) |
| 12 | 0x021576a8 | 296 | 17 | 0 | code |
| 13 | 0x021577e8 | 412 | 26 | 0 | high-fan-out (likely dispatcher / setup) |
| 14 | 0x021579a8 | 1,482 | 90 | 0 | high-fan-out (likely dispatcher / setup) |
| 15 | 0x02157fb0 | 626 | 35 | 0 | high-fan-out (likely dispatcher / setup) |
| 16 | 0x0215823c | 738 | 37 | 0 | high-fan-out (likely dispatcher / setup) |
| 17 | 0x0215853c | 328 | 20 | 0 | code |
| 18 | 0x02158690 | 38 | 1 | 0 | trampoline / small helper |
| 19 | 0x021586b8 | 134 | 8 | 0 | code |
| 20 | 0x02158744 | 122 | 7 | 0 | code |
| 21 | 0x021587c4 | 96 | 3 | 1 | refs: pack1gcmn |
| 22 | 0x02158830 | 34 | 2 | 0 | trampoline / small helper |
| 23 | 0x02158854 | 542 | 30 | 0 | high-fan-out (likely dispatcher / setup) |
| 24 | 0x02158a90 | 136 | 7 | 0 | code |
| 25 | 0x02158b20 | 26 | 1 | 0 | trampoline / small helper |
| 26 | 0x02158b3c | 26 | 1 | 0 | trampoline / small helper |
| 27 | 0x02158b58 | 52 | 1 | 0 | code |
| 28 | 0x02158b8c | 66 | 1 | 0 | code |
Open questions & conflicts
Open questions / unknowns
- Auto-analysis identified 28 functions covering 10098 of 15232 overlay bytes.
- Function names are auto-generated `FUN_<addr>`. Manual renaming based on call-graph + string-ref analysis is a follow-up.
- BSS size is 0 bytes; Ghidra-imported overlay does not include BSS so any references into the BSS range appear as unresolved.
Conflicts with the prior shallow pass
- No major conflicts detected with prior-pass `overlay_role_final.json` record.
Source
- Per-overlay markdown:
notes/overlay_knowledgebase/ov041.md - Raw Ghidra dump:
notes/overlay_knowledgebase/raw/ov041.json - Overlay-system explainer: overlays system
- Plain-English overlay primer: overlay knowledgebase