re: the 147 ISL built-ins characterised; Stage 02 gates on units, not counts
Table at 0x8227226C is 147 big-endian absolute VAs (verified structurally: it ends exactly where the first handler begins, all targets inside sub_82272220). Arguments are not in the instruction -- every handler does c_str() on [phase+20], a packed blob, which is what the local[] staging fills. Return 2 = yield; five built-ins block by skipping the pc advance. Recovered the ScriptPhase state layout: 32-entry float and flag register files, int/double result registers, the timer block, and the runtime unit array at +324 indexed by symbol-table-2 index -- a direct hook from bytecode call sites to the two .ssb symbol tables. Spot-checked two claims against the disassembly rather than trusting them: id 4 loads a DOUBLE into the thread countdown and returns 2 (wait_s), and id 24 reads current/initial squadron member counts (squad_survival_pct). Both exact. Counting Stage02.ssb: unit_state 255, hp_pct_test 167, dist_lt 92, unit_alive 71, unit_relation 52 -- and squad_survival_pct, group_ratio_pct and the two global counters are NOT called at all. So Stage 02's phases are gated on named units (destroyed / HP / proximity), never on an aggregate count, even though the kill-counter primitives exist in the VM. That answers the standing 'next wave after N kills or after an event?' question for this stage: specific units, not a number. isl.py now names the built-ins, so the run-up to the first END_PHASE reads wait_cmds_drained / fade_sound(3) / builtin85(3) / wait_s(3) / END_PHASE. Not settled: 3 handlers unresolved (55, 75, 105); the 1024-slot interpreter command table is only partly recovered.
This commit is contained in:
Sylpheed RE agent
@@ -1,4 +1,4 @@
|
||||
# Stage02.ssb — ISL built-in call sites
|
||||
# Stage02.ssb — ISL disassembly artefacts
|
||||
|
||||
2846 call sites, 73 distinct built-ins
|
||||
builtin 11 372 site(s)
|
||||
@@ -75,28 +75,63 @@
|
||||
builtin 99 1 site(s)
|
||||
builtin 28 1 site(s)
|
||||
|
||||
## the phase-control built-ins, by site
|
||||
builtin 6 END PHASE 12 site(s): 0x51e4 0x5828 0x6010 0x6260 0x19640 0x19934 0x1ac44 0x2b96c 0x2bfb0 0x2c1e0 0x2cf74 0x2d1dc
|
||||
builtin 62 force-end 3 site(s): 0x1482c 0x249f0 0x34a10
|
||||
builtin 39 mark LAST phase 8 site(s): 0x4dfc 0x52c8 0x60fc 0x19258 0x19724 0x2b584 0x2ba50 0x2c054
|
||||
builtin 40 result=1 4 site(s): 0x5a10 0x1a270 0x2c578 0x2d06c
|
||||
## phase-control sites
|
||||
6 END_PHASE 12: 0x51e4 0x5828 0x6010 0x6260 0x19640 0x19934 0x1ac44 0x2b96c 0x2bfb0 0x2c1e0 0x2cf74 0x2d1dc
|
||||
62 FORCE_END_PHASE 3: 0x1482c 0x249f0 0x34a10
|
||||
39 MARK_LAST_PHASE 8: 0x4dfc 0x52c8 0x60fc 0x19258 0x19724 0x2b584 0x2ba50 0x2c054
|
||||
40 mark_not_last 4: 0x5a10 0x1a270 0x2c578 0x2d06c
|
||||
|
||||
## disassembly into the first END PHASE
|
||||
## condition vocabulary actually used by Stage 02
|
||||
11 yield 372
|
||||
69 unit_state 255
|
||||
1 start_coroutine 216
|
||||
30 objective_marker 179
|
||||
20 hp_pct_test 167
|
||||
18 dist_lt 92
|
||||
5 await_label 83
|
||||
70 unit_alive 71
|
||||
56 unit_relation 52
|
||||
4 wait_s 34
|
||||
26 damage_unit 33
|
||||
3 move_order 20
|
||||
124 timer_stop 15
|
||||
120 wait_cmds_drained 14
|
||||
8 set_flag 12
|
||||
100 push_trigger 12
|
||||
93 clear_flag 12
|
||||
59 fade_sound 12
|
||||
6 END_PHASE 12
|
||||
9 read_freg 12
|
||||
95 unit_hp_pct 9
|
||||
115 named_event 9
|
||||
39 MARK_LAST_PHASE 8
|
||||
90 camera_at_route 8
|
||||
17 wait_frames 6
|
||||
10 random 6
|
||||
123 timer_resume 5
|
||||
40 mark_not_last 4
|
||||
137 wait_units_ready 3
|
||||
52 play_stream 3
|
||||
14 play_bgm 3
|
||||
62 FORCE_END_PHASE 3
|
||||
127 timer_set 1
|
||||
|
||||
## disassembly into the first END_PHASE
|
||||
resync from 0x5058
|
||||
005058: 0000080C jmp len=8 k=00,00 0000507C -> code+0x507C (file 0x50A0)
|
||||
005060: 01020C00 set.i len=12 k=01,02 00000000 00000042
|
||||
00506C: 02030C00 set.i len=12 k=02,03 00000000 00000000
|
||||
005078: 01020C00 set.i len=12 k=01,02 00000000 00000002
|
||||
005084: 02030C00 set.i len=12 k=02,03 00000004 00000000
|
||||
005090: 01020C00 set.i len=12 k=01,02 00000000 00000001
|
||||
00509C: 02030C00 set.i len=12 k=02,03 00000008 00000000
|
||||
0050A8: 01020C00 set.i len=12 k=01,02 00000000 00000009
|
||||
0050B4: 02030C00 set.i len=12 k=02,03 0000000C 00000000
|
||||
0050C0: 01020C00 set.i len=12 k=01,02 00000000 00000001
|
||||
0050CC: 02030C00 set.i len=12 k=02,03 00000010 00000000
|
||||
0050D8: 01021001 set.f len=16 k=01,02 00000000 BFF00000 00000000
|
||||
0050E8: 02030C01 set.f len=12 k=02,03 00000018 00000000
|
||||
0050F4: 00000C13 call len=12 k=00,00 00000040 00000245 builtin=64
|
||||
005060: 01020C00 set.i len=12 k=01,02 00000000 00000042 special[0] = imm 0x42
|
||||
00506C: 02030C00 set.i len=12 k=02,03 00000000 00000000 local[0] = special[0]
|
||||
005078: 01020C00 set.i len=12 k=01,02 00000000 00000002 special[0] = imm 0x2
|
||||
005084: 02030C00 set.i len=12 k=02,03 00000004 00000000 local[4] = special[0]
|
||||
005090: 01020C00 set.i len=12 k=01,02 00000000 00000001 special[0] = imm 0x1
|
||||
00509C: 02030C00 set.i len=12 k=02,03 00000008 00000000 local[8] = special[0]
|
||||
0050A8: 01020C00 set.i len=12 k=01,02 00000000 00000009 special[0] = imm 0x9
|
||||
0050B4: 02030C00 set.i len=12 k=02,03 0000000C 00000000 local[12] = special[0]
|
||||
0050C0: 01020C00 set.i len=12 k=01,02 00000000 00000001 special[0] = imm 0x1
|
||||
0050CC: 02030C00 set.i len=12 k=02,03 00000010 00000000 local[16] = special[0]
|
||||
0050D8: 01021001 set.f len=16 k=01,02 00000000 BFF00000 00000000 special[0] = imm -1
|
||||
0050E8: 02030C01 set.f len=12 k=02,03 00000018 00000000 local[24] = special[0]
|
||||
0050F4: 00000C13 call len=12 k=00,00 00000040 00000245 builtin64(0x42, 0x2, 0x1, 0x9, 0x1, -1)
|
||||
005100: 0000080C jmp len=8 k=00,00 0000507C -> code+0x507C (file 0x50A0)
|
||||
005108: 0000080C jmp len=8 k=00,00 0000507C -> code+0x507C (file 0x50A0)
|
||||
005110: 01020C0A op10 len=12 k=01,02 00000000 00000000
|
||||
@@ -107,24 +142,24 @@ resync from 0x5058
|
||||
005144: 0000080D op13 len=8 k=00,00 00004ED4
|
||||
00514C: 01020C0A op10 len=12 k=01,02 00000000 00000003
|
||||
005158: 0000080D op13 len=8 k=00,00 00004F7C
|
||||
005160: 00000C13 call len=12 k=00,00 00000078 00000248 builtin=120
|
||||
00516C: 01021001 set.f len=16 k=01,02 00000000 40080000 00000000
|
||||
00517C: 02030C01 set.f len=12 k=02,03 00000000 00000000
|
||||
005188: 00000C13 call len=12 k=00,00 0000003B 0000024A builtin=59
|
||||
005194: 01021001 set.f len=16 k=01,02 00000000 40080000 00000000
|
||||
0051A4: 02030C01 set.f len=12 k=02,03 00000000 00000000
|
||||
0051B0: 00000C13 call len=12 k=00,00 00000055 0000024B builtin=85
|
||||
0051BC: 01021001 set.f len=16 k=01,02 00000000 40080000 00000000
|
||||
0051CC: 02030C01 set.f len=12 k=02,03 00000000 00000000
|
||||
0051D8: 00000C13 call len=12 k=00,00 00000004 0000024C builtin=4
|
||||
0051E4: 00000C13 call len=12 k=00,00 00000006 0000024D builtin=6
|
||||
0051F0: 00000C13 call len=12 k=00,00 0000000B 0000024E builtin=11
|
||||
0051FC: 01030C00 set.i len=12 k=01,03 00000000 00000001
|
||||
005208: 01030C00 set.i len=12 k=01,03 00000004 00000056
|
||||
005214: 01021001 set.f len=16 k=01,02 00000000 00000000 00000000
|
||||
005224: 02030C01 set.f len=12 k=02,03 00000008 00000000
|
||||
005230: 00000C13 call len=12 k=00,00 00000014 00000252 builtin=20
|
||||
005160: 00000C13 call len=12 k=00,00 00000078 00000248 wait_cmds_drained
|
||||
00516C: 01021001 set.f len=16 k=01,02 00000000 40080000 00000000 special[0] = imm 3
|
||||
00517C: 02030C01 set.f len=12 k=02,03 00000000 00000000 local[0] = special[0]
|
||||
005188: 00000C13 call len=12 k=00,00 0000003B 0000024A fade_sound(3)
|
||||
005194: 01021001 set.f len=16 k=01,02 00000000 40080000 00000000 special[0] = imm 3
|
||||
0051A4: 02030C01 set.f len=12 k=02,03 00000000 00000000 local[0] = special[0]
|
||||
0051B0: 00000C13 call len=12 k=00,00 00000055 0000024B builtin85(3)
|
||||
0051BC: 01021001 set.f len=16 k=01,02 00000000 40080000 00000000 special[0] = imm 3
|
||||
0051CC: 02030C01 set.f len=12 k=02,03 00000000 00000000 local[0] = special[0]
|
||||
0051D8: 00000C13 call len=12 k=00,00 00000004 0000024C wait_s(3)
|
||||
0051E4: 00000C13 call len=12 k=00,00 00000006 0000024D END_PHASE
|
||||
0051F0: 00000C13 call len=12 k=00,00 0000000B 0000024E yield
|
||||
0051FC: 01030C00 set.i len=12 k=01,03 00000000 00000001 local[0] = imm 0x1
|
||||
005208: 01030C00 set.i len=12 k=01,03 00000004 00000056 local[4] = imm 0x56
|
||||
005214: 01021001 set.f len=16 k=01,02 00000000 00000000 00000000 special[0] = imm 0
|
||||
005224: 02030C01 set.f len=12 k=02,03 00000008 00000000 local[8] = special[0]
|
||||
005230: 00000C13 call len=12 k=00,00 00000014 00000252 hp_pct_test(0)
|
||||
00523C: 01020C0A op10 len=12 k=01,02 00000000 00000001
|
||||
005248: 0000080E op14 len=8 k=00,00 0000575C
|
||||
005250: 01020C00 set.i len=12 k=01,02 00000000 00000000
|
||||
00525C: 02030C00 set.i len=12 k=02,03 00000000 00000000
|
||||
005250: 01020C00 set.i len=12 k=01,02 00000000 00000000 special[0] = imm 0x0
|
||||
00525C: 02030C00 set.i len=12 k=02,03 00000000 00000000 local[0] = special[0]
|
||||
|
||||
120
docs/re/structures/isl-builtins.md
Normal file
120
docs/re/structures/isl-builtins.md
Normal file
@@ -0,0 +1,120 @@
|
||||
# The 147 ISL built-ins
|
||||
|
||||
Status: ✅ table encoding, calling convention and the `ScriptPhase` state layout;
|
||||
✅ ~135 of 147 handlers characterised from the disassembly; 🟡 three resolved
|
||||
only partially; ❔ the interpreter-command table is only partly recovered.
|
||||
|
||||
Companion to [isl-bytecode](isl-bytecode.md) (the instruction encoding) and
|
||||
[mission-phase-advance](../mission-phase-advance.md) (why phases hinge on these).
|
||||
|
||||
## ✅ Table and calling convention
|
||||
|
||||
`0x8227226C … 0x822724B7` is **147 big-endian absolute VAs** — no base-relative
|
||||
offsets. Verified structurally: the table starts immediately after the `bctr` at
|
||||
`0x82272268`, `0x8227226C + 147·4 = 0x822724B8` is exactly where the first
|
||||
handler begins, and every target lies inside `sub_82272220`.
|
||||
|
||||
Six ids are **unused defaults** (0, 0x41–0x44, 0x7A) and about ten more are
|
||||
deliberate stubs returning a constant.
|
||||
|
||||
Arguments do **not** live in the instruction. Every handler starts
|
||||
`addi r3,r31,20 ; bl 0x82454A40` — `std::string::c_str()` — so `[phase+20]` is a
|
||||
**packed operand blob**, which is what the `local[]` staging in
|
||||
[isl-bytecode](isl-bytecode.md) fills.
|
||||
|
||||
Return codes: **0** continue, **2** yield (re-execute next frame), **3**
|
||||
coroutine control. Five built-ins skip the pc advance on 2 and so genuinely
|
||||
**block**: 97, 120, 137, 142, 143.
|
||||
|
||||
## ✅ `ScriptPhase` state layout
|
||||
|
||||
| offset | meaning |
|
||||
|---|---|
|
||||
| `+88` | **32-entry float register file** |
|
||||
| `+120` | **32-entry flag register file** |
|
||||
| `+160` | frame-wait counter |
|
||||
| `+164` / `+176` | **int** / **double result register** |
|
||||
| `+196` | phase-finished flag |
|
||||
| `+232` / `+236` | code base / end-event offset |
|
||||
| `+244` | **symbol table 1** base (route + message names) |
|
||||
| `+272` | trigger queue |
|
||||
| `+300` | 1 = not last phase, 2 = last |
|
||||
| `+304…+320` | mission timer (elapsed, t0, limit, running, enabled) |
|
||||
| `+324` | **runtime unit array**, indexed by **symbol table 2** index |
|
||||
|
||||
Per-unit record: `+4` live object (NULL = absent), `+16` state (2 = active;
|
||||
1/3/4 = gone/dead/invalid), `+32/40/48` position, `+128/132` HP / max HP,
|
||||
`+140` flag bitmask.
|
||||
|
||||
**That is the hook into the data**: blob fields indexing `[phase+244]` are
|
||||
symtab-1 indices and fields indexing `[phase+324]` are symtab-2 indices — the
|
||||
two tables already parsed in [mission-script-ssb](mission-script-ssb.md).
|
||||
|
||||
## ✅ The conditions a phase can test
|
||||
|
||||
| id | name | what it tests |
|
||||
|---|---|---|
|
||||
| **6 / 62** | `END_PHASE` / `FORCE_END_PHASE` | sets `[+196]`, with / without the end event |
|
||||
| **39 / 40** | `MARK_LAST_PHASE` / `mark_not_last` | `[+300] = 2` / `1` |
|
||||
| **69 / 70** | `unit_state` / `unit_alive` | a **named unit's** lifecycle state; state == 2 |
|
||||
| **20 / 95** | `hp_pct_test` / `unit_hp_pct` | unit HP as a percentage of max |
|
||||
| **18** | `dist_lt` | 3-D distance between two named units below a threshold |
|
||||
| **24 / 72** | `squad_survival_pct` / `group_ratio_pct` | current ÷ initial squadron members × 100 |
|
||||
| **56 / 94** | `unit_relation` / `is_engaged` | relation between units; is anything engaging this one |
|
||||
| **33 / 34** | `global_counter0/1` | two global counters read straight into `[+164]` |
|
||||
| **132–134** | player gauges | speed/boost ratios and a player byte |
|
||||
| **73, 123–127** | timer family | start / resume / stop / reset / read elapsed / read limit |
|
||||
| **8 / 9 / 93** | `set_flag` / `read_freg` / `clear_flag` | latch a result into the 32-entry files |
|
||||
| **100 / 115** | `push_trigger` / `named_event` | the engine→script edge |
|
||||
|
||||
**The state machine is therefore:** a trigger fires a coroutine → the coroutine
|
||||
tests one of the predicates → it latches the answer with `set_flag` → some later
|
||||
thread reaches `END_PHASE`.
|
||||
|
||||
Two spot-checks I ran against the disassembly rather than taking on trust:
|
||||
|
||||
* **id 4 (`wait_s`)** — `c_str()`, `li r3,2` (yield), `lfd f0,0(r11)`,
|
||||
`stfd f0,8(r30)`: a **double** seconds value into the thread countdown. Exactly
|
||||
as described.
|
||||
* **id 24 (`squad_survival_pct`)** — indexes `[phase+324]` by `[arg+4]`, rejects
|
||||
a NULL object and state 1, then calls `823011B0` (initial, packed
|
||||
`hi<<16|lo`) and `82301118` (current). Exactly as described.
|
||||
|
||||
## ✅ What Stage 02 actually uses — and it settles a standing question
|
||||
|
||||
Counting call sites in `Stage02.ssb` (`data/isl-stage02.txt`):
|
||||
|
||||
| built-in | sites |
|
||||
|---|---|
|
||||
| `unit_state` | **255** |
|
||||
| `hp_pct_test` | **167** |
|
||||
| `dist_lt` | **92** |
|
||||
| `unit_alive` | **71** |
|
||||
| `unit_relation` | **52** |
|
||||
| `set_flag` / `clear_flag` / `push_trigger` | 12 each |
|
||||
| `END_PHASE` / `MARK_LAST_PHASE` / `FORCE_END_PHASE` | 12 / 8 / 3 |
|
||||
|
||||
**Not used at all in Stage 02:** `squad_survival_pct`, `group_ratio_pct`,
|
||||
`global_counter0/1`, `is_engaged`, `player_gauge*`, `prompt_yes_no`,
|
||||
`deploy_and_wait`.
|
||||
|
||||
🔑 **So Stage 02's phases are gated on named-unit tests — destroyed / HP /
|
||||
proximity — and not on any aggregate count.** The kill-counter primitives exist
|
||||
in the VM (33, 34) and this mission never calls them.
|
||||
|
||||
That is a direct answer to the standing "does the next wave start after N kills
|
||||
or after an event?" question, at least for Stage 02: **specific units, not a
|
||||
number.** "Certain objectives shot down" is right; "a certain number shot down"
|
||||
is not.
|
||||
|
||||
⚠️ Scoped to Stage 02. Other stages may well use `squad_survival_pct` — the
|
||||
counting is per-file and cheap to repeat.
|
||||
|
||||
## 🟡 Not settled
|
||||
|
||||
* **Three handlers resisted**: id 55 (`vt35`, 411 instructions, returns a float),
|
||||
id 75 (`vt52`, message/HUD-ish), id 105 (`vt73`, meaning of unit field `+600`).
|
||||
* The **1024-slot interpreter-command table** is only partly recovered — 57
|
||||
slots, by simulating the constant/stack dataflow of `sub_822FE040`.
|
||||
* Names here are from handler behaviour, not from symbols; `isl.py` prints a bare
|
||||
`builtinN` for anything unread rather than guessing.
|
||||
Reference in New Issue
Block a user