re: the 60 duplicated functions are static-object constructors
Each of the 60 builds a 40-element array of 24-byte string objects: addis 0x820B + addi fetches the literal, addi r30,r11,12944 fixes the array (0x828E3290 for the first), bl sub_8217FA08(dest, literal, -1) assigns, the rest of the object is zeroed, addi r3,r30,24 steps on. Why they have no callers: each appears exactly twice in the image - once in the .pdata unwind table, where EVERY function appears as (address, prolog/ length word) and reading it as a registry is a trap - and once as a slot of a null-terminated 182-entry function-pointer array at 0x82870018-0x828702EC, 170 of whose targets have zero direct xrefs. That is the static-initialiser list. Zero callers here means "static ctor", not "dead code". The teardown side confirms it: 39-43 functions sit between consecutive clones (median 40), the dominant size in 0x8281xxxx-0x8284xxxx is 11 instructions (2280 of them, about 60 x 40), and three consecutive ones call sub_823F3D68 on 0x828E3290, +24, +48 - one destructor thunk per element, same stride, same global, all zero-xref. rot_n001 and rou_e202 ARE on the disc: a raw byte sweep finds rot_n001 26 times in 7 archives (DefTables included) and rou_e202 6 in 6, exactly one per GP_MAIN_GAME_<lang> pack. Controls: rou_e201 151/8, rou_e901 917/8, mob_n500 46/8. Narrows the earlier claim to "not GameResourceID values". Not settled: what reads the arrays. An exact-address search returns 2347 functions outside the 60 - too broad to be a consumer list; the globals sit in a dense data region and that route has no power. All fifteen artefacts byte-identical.
This commit is contained in:
@@ -435,3 +435,57 @@ Two names the image carries that this disc field never uses.
|
||||
|
||||
🟡 Not settled: what the 60 globals are read by, and what selects 40 of the 172
|
||||
`rou_*` ids.
|
||||
|
||||
## ✅ What the 60 duplicated functions are (2026-08-28)
|
||||
|
||||
Following the duplication finding above: each of the 60 is a **static-object
|
||||
constructor**, and the object it builds is a **40-element array of 24-byte string
|
||||
objects**.
|
||||
|
||||
```
|
||||
8280FE20 addis r11, r0, 0x820B ; the string literal
|
||||
8280FE28 addi r4, r11, -9584
|
||||
8280FE34 addi r30, r11, 12944 ; r30 = 0x828E3290, the array
|
||||
8280FE3C bl 0x8217FA08 ; assign(dest, literal, -1)
|
||||
8280FE40 li r11, 0 … stw r11,4..20(r30) ; zero the rest of the object
|
||||
8280FE64 addi r3, r30, 24 ; next element, stride 24
|
||||
```
|
||||
|
||||
**Why they have no callers.** Each clone appears exactly **twice** in the whole
|
||||
image: once in the `.pdata` unwind table — where every function appears, as
|
||||
`(address, prolog/length word)`, and reading that as a registry is a trap — and
|
||||
once as a slot of a **null-terminated 182-entry function-pointer array at
|
||||
`0x82870018`–`0x828702EC`**. **170 of those 182 targets have zero direct xrefs**,
|
||||
so the array is dispatched indirectly: it is the static-initialiser list, run
|
||||
before `main`. Zero callers here means "static ctor", not "dead code".
|
||||
|
||||
**The teardown side confirms the shape.** Between two consecutive clones sit
|
||||
**39–43 other functions (median 40)**, and the dominant size in the whole
|
||||
`0x8281xxxx`–`0x8284xxxx` region is **11 instructions, 2 280 of them** (60 × ~40).
|
||||
Reading three consecutive ones:
|
||||
|
||||
```
|
||||
sub_828105BC: r3 = 0x828E3290 -> bl sub_823F3D68
|
||||
sub_828105E4: r3 = 0x828E3290 + 24 -> bl sub_823F3D68
|
||||
sub_82810610: r3 = 0x828E3290 + 48 -> bl sub_823F3D68
|
||||
```
|
||||
|
||||
One thunk per element, same 24-byte stride, same global, all with zero xrefs —
|
||||
the per-object destructors registered at exit. So the pattern is **one ctor
|
||||
writing 40 names + 40 one-line dtor thunks, emitted 60 times**: a template or
|
||||
macro-generated static array, not sixty tables.
|
||||
|
||||
🟡 What this still does not say: **which code reads the arrays**. An exact-address
|
||||
search finds 2 347 functions outside the 60 that materialise one of the 60 global
|
||||
addresses — far too broad to be a consumer list, and the region is a dense global
|
||||
data area, so that search has no power here. The consumer needs a different route.
|
||||
|
||||
### ✅ `rot_n001` and `rou_e202` are on the disc after all
|
||||
|
||||
Both are absent from the 480 `GameResourceID` values, but a raw byte search across
|
||||
every decompressed pak entry finds **`rot_n001` 26 times in 7 archives**
|
||||
(including `DefTables.pak`) and **`rou_e202` 6 times in 6** — and those six are
|
||||
exactly one per `GP_MAIN_GAME_<lang>` pack, with none in `DefTables`. Controls on
|
||||
the same sweep: `rou_e201` 151 / 8 archives, `rou_e901` 917 / 8, `mob_n500` 46 / 8.
|
||||
So neither is an image-only name; **`rou_e202` is simply the rarest member of the
|
||||
roster**, carried once per language pack. 🟡 Which field holds them is not settled.
|
||||
|
||||
Reference in New Issue
Block a user