forked from marbeast823/Celery
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathdecompile.lua
805 lines (736 loc) · 43.3 KB
/
decompile.lua
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
local function deserialize(bytecode)
local reader do
reader = {}
pos = 1
function reader:pos() return pos end
function reader:nextByte()
local v = bytecode:byte(pos, pos)
pos = pos + 1
return v
end
function reader:nextChar()
return string.char(reader:nextByte());
end
function reader:nextInt()
local b = { reader:nextByte(), reader:nextByte(), reader:nextByte(), reader:nextByte() }
return (
bit32.bor(bit32.lshift(b[4], 24),
bit32.bor(bit32.lshift(b[3], 16),
bit32.bor(bit32.lshift(b[2], 8),
b[1])))
)
end
function reader:nextVarInt()
local c1, c2, b, r = 0, 0, 0, 0
repeat
c1 = reader:nextByte()
c2 = bit32.band(c1, 0x7F)
r = bit32.bor(r, bit32.lshift(c2, b))
b = b + 7
until not bit32.btest(c1, 0x80)
return r;
end
function reader:nextString()
local result = ""
local len = reader:nextVarInt();
for i = 1, len do
result = result .. reader:nextChar();
end
return result;
end
function reader:nextDouble()
local b = {};
for i = 1, 8 do
table.insert(b, reader:nextByte());
end
local str = '';
for i = 1, 8 do
str = str .. string.char(b[i]);
end
return string.unpack("<d", str)
end
end
local bytecodeVersion = reader:nextByte()
if (bytecodeVersion ~= 0) then
local protoTable = {}
local stringTable = {}
local bytecodeEncoding = reader:nextByte()
local sizeStrings = reader:nextVarInt()
for i = 1,sizeStrings do
stringTable[i] = reader:nextString()
end
local sizeProtos = reader:nextVarInt();
for i = 1,sizeProtos do
protoTable[i] = {} -- pre-initialize an entry
protoTable[i].codeTable = {}
protoTable[i].kTable = {}
protoTable[i].pTable = {}
protoTable[i].smallLineInfo = {}
protoTable[i].largeLineInfo = {}
end
for i = 1,sizeProtos do
local proto = protoTable[i]
proto.maxStackSize = reader:nextByte()
proto.numParams = reader:nextByte()
proto.numUpValues = reader:nextByte()
proto.isVarArg = reader:nextByte()
if (bytecodeVersion >= 4) then
proto.flags = reader:nextByte()
proto.typeinfo = reader:nextVarInt()
if proto.typeinfo ~= 0 then
error'typeinfo not implemented'
end
end
proto.sizeCode = reader:nextVarInt()
for j = 1,proto.sizeCode do
proto.codeTable[j] = reader:nextInt()
end
proto.sizeConsts = reader:nextVarInt();
for j = 1,proto.sizeConsts do
local k = {};
k.value = nil;
k.type = reader:nextByte();
if k.type == 0 then -- nil
elseif k.type == 1 then -- boolean
k.value = (reader:nextByte() == 1 and true or false)
elseif k.type == 2 then -- number
k.value = reader:nextDouble()
elseif k.type == 3 then -- string
k.value = stringTable[reader:nextVarInt()]
elseif k.type == 4 then -- cache
k.value = reader:nextInt()
elseif k.type == 5 then -- table
k.value = { ["size"] = reader:nextVarInt(), ["ids"] = {} }
for s = 1,k.value.size do
table.insert(k.value.ids, reader:nextVarInt() + 1)
end
elseif k.type == 6 then -- closure
k.value = reader:nextVarInt() + 1 -- closure id
else
error(string.format("Unrecognized constant type: %i", k.type))
end
proto.kTable[j] = k
end
proto.sizeProtos = reader:nextVarInt();
for j = 1,proto.sizeProtos do
proto.pTable[j] = protoTable[reader:nextVarInt() + 1]
end
proto.lineDefined = reader:nextVarInt()
local protoSourceId = reader:nextVarInt()
proto.source = stringTable[protoSourceId]
if (reader:nextByte() == 1) then -- Has Line info?
local compKey = reader:nextByte()
for j = 1,proto.sizeCode do
proto.smallLineInfo[j] = reader:nextByte()
end
local n = bit32.band(proto.sizeCode + 3, -4)
local intervals = bit32.rshift(proto.sizeCode - 1, compKey) + 1
for j = 1,intervals do
proto.largeLineInfo[j] = reader:nextInt()
end
end
if (reader:nextByte() == 1) then -- Has Debug info?
error'debuginfo not supported'
end
end
local mainProtoId = reader:nextVarInt()
return protoTable[mainProtoId + 1], protoTable, stringTable;
else
error(string.format("Invalid bytecode (version: %i)", bytecodeVersion))
return nil;
end
end
local function getluauoptable()
return {
-- I could use case multiplier, but that depends only on how accurate
-- our ordering of the opcodes are -- so if we really want to rely on
-- the latest updated luau source, then we could do it that way.
{ ["name"] = "NOP", ["type"] = "none", ["case"] = 0, ["number"] = 0x00 },
{ ["name"] = "BREAK", ["type"] = "none", ["case"] = 1, ["number"] = 0xE3 },
{ ["name"] = "LOADNIL", ["type"] = "iA", ["case"] = 2, ["number"] = 0xC6 },
{ ["name"] = "LOADB", ["type"] = "iABC", ["case"] = 3, ["number"] = 0xA9 },
{ ["name"] = "LOADN", ["type"] = "iABx", ["case"] = 4, ["number"] = 0x8C },
{ ["name"] = "LOADK", ["type"] = "iABx", ["case"] = 5, ["number"] = 0x6F },
{ ["name"] = "MOVE", ["type"] = "iAB", ["case"] = 6, ["number"] = 0x52 },
{ ["name"] = "GETGLOBAL", ["type"] = "iAC", ["case"] = 7, ["number"] = 0x35, ["aux"] = true },
{ ["name"] = "SETGLOBAL", ["type"] = "iAC", ["case"] = 8, ["number"] = 0x18, ["aux"] = true },
{ ["name"] = "GETUPVAL", ["type"] = "iAB", ["case"] = 9, ["number"] = 0xFB },
{ ["name"] = "SETUPVAL", ["type"] = "iAB", ["case"] = 10, ["number"] = 0xDE },
{ ["name"] = "CLOSEUPVALS", ["type"] = "iA", ["case"] = 11, ["number"] = 0xC1 },
{ ["name"] = "GETIMPORT", ["type"] = "iABx", ["case"] = 12, ["number"] = 0xA4, ["aux"] = true },
{ ["name"] = "GETTABLE", ["type"] = "iABC", ["case"] = 13, ["number"] = 0x87 },
{ ["name"] = "SETTABLE", ["type"] = "iABC", ["case"] = 14, ["number"] = 0x6A },
{ ["name"] = "GETTABLEKS", ["type"] = "iABC", ["case"] = 15, ["number"] = 0x4D, ["aux"] = true },
{ ["name"] = "SETTABLEKS", ["type"] = "iABC", ["case"] = 16, ["number"] = 0x30, ["aux"] = true },
{ ["name"] = "GETTABLEN", ["type"] = "iABC", ["case"] = 17, ["number"] = 0x13 },
{ ["name"] = "SETTABLEN", ["type"] = "iABC", ["case"] = 18, ["number"] = 0xF6 },
{ ["name"] = "NEWCLOSURE", ["type"] = "iABx", ["case"] = 19, ["number"] = 0xD9 },
{ ["name"] = "NAMECALL", ["type"] = "iABC", ["case"] = 20, ["number"] = 0xBC, ["aux"] = true },
{ ["name"] = "CALL", ["type"] = "iABC", ["case"] = 21, ["number"] = 0x9F },
{ ["name"] = "RETURN", ["type"] = "iAB", ["case"] = 22, ["number"] = 0x82 },
{ ["name"] = "JUMP", ["type"] = "isBx", ["case"] = 23, ["number"] = 0x65 },
{ ["name"] = "JUMPBACK", ["type"] = "isBx", ["case"] = 24, ["number"] = 0x48 },
{ ["name"] = "JUMPIF", ["type"] = "iAsBx", ["case"] = 25, ["number"] = 0x2B },
{ ["name"] = "JUMPIFNOT", ["type"] = "iAsBx", ["case"] = 26, ["number"] = 0x0E },
{ ["name"] = "JUMPIFEQ", ["type"] = "iAsBx", ["case"] = 27, ["number"] = 0xF1, ["aux"] = true },
{ ["name"] = "JUMPIFLE", ["type"] = "iAsBx", ["case"] = 28, ["number"] = 0xD4, ["aux"] = true },
{ ["name"] = "JUMPIFLT", ["type"] = "iAsBx", ["case"] = 29, ["number"] = 0xB7, ["aux"] = true },
{ ["name"] = "JUMPIFNOTEQ", ["type"] = "iAsBx", ["case"] = 30, ["number"] = 0x9A, ["aux"] = true },
{ ["name"] = "JUMPIFNOTLE", ["type"] = "iAsBx", ["case"] = 31, ["number"] = 0x7D, ["aux"] = true },
{ ["name"] = "JUMPIFNOTLT", ["type"] = "iAsBx", ["case"] = 32, ["number"] = 0x60, ["aux"] = true },
{ ["name"] = "ADD", ["type"] = "iABC", ["case"] = 33, ["number"] = 0x43 },
{ ["name"] = "SUB", ["type"] = "iABC", ["case"] = 34, ["number"] = 0x26 },
{ ["name"] = "MUL", ["type"] = "iABC", ["case"] = 35, ["number"] = 0x09 },
{ ["name"] = "DIV", ["type"] = "iABC", ["case"] = 36, ["number"] = 0xEC },
{ ["name"] = "MOD", ["type"] = "iABC", ["case"] = 37, ["number"] = 0xCF },
{ ["name"] = "POW", ["type"] = "iABC", ["case"] = 38, ["number"] = 0xB2 },
{ ["name"] = "ADDK", ["type"] = "iABC", ["case"] = 39, ["number"] = 0x95 },
{ ["name"] = "SUBK", ["type"] = "iABC", ["case"] = 40, ["number"] = 0x78 },
{ ["name"] = "MULK", ["type"] = "iABC", ["case"] = 41, ["number"] = 0x5B },
{ ["name"] = "DIVK", ["type"] = "iABC", ["case"] = 42, ["number"] = 0x3E },
{ ["name"] = "MODK", ["type"] = "iABC", ["case"] = 43, ["number"] = 0x21 },
{ ["name"] = "POWK", ["type"] = "iABC", ["case"] = 44, ["number"] = 0x04 },
{ ["name"] = "AND", ["type"] = "iABC", ["case"] = 45, ["number"] = 0xE7 },
{ ["name"] = "OR", ["type"] = "iABC", ["case"] = 46, ["number"] = 0xCA },
{ ["name"] = "ANDK", ["type"] = "iABC", ["case"] = 47, ["number"] = 0xAD },
{ ["name"] = "ORK", ["type"] = "iABC", ["case"] = 48, ["number"] = 0x90 },
{ ["name"] = "CONCAT", ["type"] = "iABC", ["case"] = 49, ["number"] = 0x73 },
{ ["name"] = "NOT", ["type"] = "iAB", ["case"] = 50, ["number"] = 0x56 },
{ ["name"] = "UNM", ["type"] = "iAB", ["case"] = 51, ["number"] = 0x39 },
{ ["name"] = "LEN", ["type"] = "iAB", ["case"] = 52, ["number"] = 0x1C },
{ ["name"] = "NEWTABLE", ["type"] = "iAB", ["case"] = 53, ["number"] = 0xFF, ["aux"] = true },
{ ["name"] = "DUPTABLE", ["type"] = "iABx", ["case"] = 54, ["number"] = 0xE2 },
{ ["name"] = "SETLIST", ["type"] = "iABC", ["case"] = 55, ["number"] = 0xC5, ["aux"] = true },
{ ["name"] = "NFORPREP", ["type"] = "iABx", ["case"] = 56, ["number"] = 0xA8 },
{ ["name"] = "NFORLOOP", ["type"] = "iABx", ["case"] = 57, ["number"] = 0x8B },
{ ["name"] = "TFORLOOP", ["type"] = "iABx", ["case"] = 58, ["number"] = 0x6E, ["aux"] = true },
{ ["name"] = "IPAIRSPREP", ["type"] = "none", ["case"] = 59, ["number"] = 0x51 },
{ ["name"] = "IPAIRSLOOP", ["type"] = "none", ["case"] = 60, ["number"] = 0x34 },
{ ["name"] = "PAIRSPREP", ["type"] = "none", ["case"] = 61, ["number"] = 0x17 },
{ ["name"] = "PAIRSLOOP", ["type"] = "none", ["case"] = 62, ["number"] = 0xFA },
{ ["name"] = "GETVARARGS", ["type"] = "iAB", ["case"] = 63, ["number"] = 0xDD },
{ ["name"] = "DUPCLOSURE", ["type"] = "iABx", ["case"] = 64, ["number"] = 0xC0 },
{ ["name"] = "PREPVARARGS", ["type"] = "iA", ["case"] = 65, ["number"] = 0xA3 },
{ ["name"] = "LOADKX", ["type"] = "iA", ["case"] = 66, ["number"] = 0x86 },
{ ["name"] = "JUMPX", ["type"] = "isAx", ["case"] = 67, ["number"] = 0x69 },
{ ["name"] = "FASTCALL", ["type"] = "iAC", ["case"] = 68, ["number"] = 0x4C },
{ ["name"] = "COVERAGE", ["type"] = "isAx", ["case"] = 69, ["number"] = 0x2F },
{ ["name"] = "CAPTURE", ["type"] = "iAB", ["case"] = 70, ["number"] = 0x12 },
{ ["name"] = "JUMPIFEQK", ["type"] = "iABx", ["case"] = 71, ["number"] = 0xF5, ["aux"] = true },
{ ["name"] = "JUMPIFNOTEQK", ["type"] = "iABx", ["case"] = 72, ["number"] = 0xD8, ["aux"] = true },
{ ["name"] = "FASTCALL1", ["type"] = "iABC", ["case"] = 73, ["number"] = 0xBB },
{ ["name"] = "FASTCALL2", ["type"] = "iABC", ["case"] = 74, ["number"] = 0x9E, ["aux"] = true },
{ ["name"] = "FASTCALL2K", ["type"] = "iABC", ["case"] = 75, ["number"] = 0x81, ["aux"] = true },
{ ["name"] = "COUNT", ["type"] = "none", ["case"] = 76, ["number"] = 0x64 }
};
end
local luau = {};
luau.SIZE_A = 8
luau.SIZE_C = 8
luau.SIZE_B = 8
luau.SIZE_Bx = (luau.SIZE_C + luau.SIZE_B)
luau.SIZE_OP = 8
luau.POS_OP = 0
luau.POS_A = (luau.POS_OP + luau.SIZE_OP)
luau.POS_B = (luau.POS_A + luau.SIZE_A)
luau.POS_C = (luau.POS_B + luau.SIZE_B)
luau.POS_Bx = luau.POS_B
luau.MAXARG_A = (bit32.lshift(1, luau.SIZE_A) - 1)
luau.MAXARG_B = (bit32.lshift(1, luau.SIZE_B) - 1)
luau.MAXARG_C = (bit32.lshift(1, luau.SIZE_C) - 1)
luau.MAXARG_Bx = (bit32.lshift(1, luau.SIZE_Bx) - 1)
luau.MAXARG_sBx = bit32.rshift(luau.MAXARG_Bx, 1)
luau.BITRK = bit32.lshift(1, (luau.SIZE_B - 1))
luau.MAXINDEXRK = (luau.BITRK - 1)
luau.ISK = function(x) return bit32.band(x, luau.BITRK) end
luau.INDEXK = function(x) return bit32.band(x, bit32.bnot(luau.BITRK)) end
luau.RKASK = function(x) return bit32.bor(x, luau.BITRK) end
luau.MASK1 = function(n,p) return bit32.lshift(bit32.bnot(bit32.lshift(bit32.bnot(0), n)), p) end
luau.MASK0 = function(n,p) return bit32.bnot(luau.MASK1(n, p)) end
luau.GETARG_A = function(i) return bit32.band(bit32.rshift(i, luau.POS_A), luau.MASK1(luau.SIZE_A, 0)) end
luau.GETARG_B = function(i) return bit32.band(bit32.rshift(i, luau.POS_B), luau.MASK1(luau.SIZE_B, 0)) end
luau.GETARG_C = function(i) return bit32.band(bit32.rshift(i, luau.POS_C), luau.MASK1(luau.SIZE_C, 0)) end
luau.GETARG_Bx = function(i) return bit32.band(bit32.rshift(i, luau.POS_Bx), luau.MASK1(luau.SIZE_Bx, 0)) end
luau.GETARG_sBx = function(i) local Bx = luau.GETARG_Bx(i) local sBx = Bx + 1; if Bx > 0x7FFF and Bx <= 0xFFFF then sBx = -(0xFFFF - Bx); sBx = sBx - 1; end return sBx end
luau.GETARG_sAx = function(i) return bit32.rshift(i, 8) end
luau.GET_OPCODE = function(i) return bit32.band(bit32.rshift(i, luau.POS_OP), luau.MASK1(luau.SIZE_OP, 0)) end
local function disassemble(a1, showOps)
local bcode;
if (typeof(a1) == "Instance") then
if not getscriptbytecode then error("Executor does not support getscriptbytecode") end
bcode = getscriptbytecode(a1);
elseif (type(a1) == "string") then
bcode = a1
end
assert(bcode, "Failed to fetch " .. a1.ClassName .. " bytecode")
local output = ""
local mainProto, protoTable, stringTable = deserialize(bcode)
local luauOpTable = getluauoptable();
local function getOpCode(opName)
for _,v in pairs(luauOpTable) do
if v.name == opName then
return v.number;
end
end
return 0;
end
mainProto.source = "main"
mainScope = {}; -- scope control, coming soon
local function readProto(proto, depth)
local output = "";
local function addTabSpace(depth)
output = output .. string.rep(" ", depth)
end
-- using function name (this will be removed & done outside of readProto)
if proto.source then
output = output .. proto.source .. " = function("
else
output = output .. "function("
end
for i = 1,proto.numParams do
output = output .. "arg" .. (i - 1) -- args coincide with stack index
if i < proto.numParams then
output = output .. ", "
end
end
if proto.isVarArg ~= 0 then
if proto.numParams > 0 then
output = output .. ", "
end
output = output .. "..."
end
output = output .. ")\n"
depth = depth + 1
for i = 1,proto.numParams do
addTabSpace(depth);
output = output .. string.format("local var%i = arg%i\n", i - 1, i - 1);
end
local refData = {}
local nameCall = nil
local markedAux = false
local codeIndex = 1
while codeIndex < proto.sizeCode do
local i = proto.codeTable[codeIndex]
local opc = luau.GET_OPCODE(i)
local A = luau.GETARG_A(i)
local B = luau.GETARG_B(i)
local Bx = luau.GETARG_Bx(i)
local C = luau.GETARG_C(i)
local sBx = luau.GETARG_sBx(i)
local sAx = luau.GETARG_sAx(i)
local aux = proto.codeTable[codeIndex + 1]
if markedAux then
markedAux = false
else
addTabSpace(depth);
local opinfo;
for _,v in pairs(luauOpTable) do
if v.number == opc then
opinfo = v
break;
end
end
output = output .. tostring(codeIndex) .. ". "
if showOps and opinfo then
local str = opinfo.name .. string.rep(" ", 16 - string.len(opinfo.name))
if opinfo.type == "iA" then
str = str .. string.format("%i", A)
elseif opinfo.type == "iAB" then
str = str .. string.format("%i %i", A, B)
elseif opinfo.type == "iAC" then
str = str .. string.format("%i %i", A, C)
elseif opinfo.type == "iABx" then
str = str .. string.format("%i %i", A, Bx)
elseif opinfo.type == "iAsBx" then
str = str .. string.format("%i %i", A, sBx)
elseif opinfo.type == "isBx" then
str = str .. string.format("%i", sBx)
elseif opinfo.type == "iABC" then
str = str .. string.format("%i %i %i", A, B, C)
end
if opinfo.aux then
str = str .. " [aux]";
markedAux = true
end
output = output .. str .. string.rep(" ", 40 - string.len(str))
else
if opinfo then
if opinfo.aux then
markedAux = true;
end
end
end
-- continue with disassembly (rough decompilation -- no scope/flow control)
--
local varsDefined = {};
local function defineVar(index, name)
table.insert(varsDefined, { ["name"] = name, ["stackIndex"] = index });
end
local function isVarDefined(index)
return true;
--[[for _,v in pairs(varsDefined) do
if v.stackIndex == index then
return true
end
end
return false;
]]
end
local function addReference(refStart, refEnd)
for _,v in pairs(refData) do
if v.codeIndex == refEnd then
table.insert(v.refs, refStart);
return;
end
end
table.insert(refData, { ["codeIndex"] = refEnd, ["refs"] = { refStart } });
end
local nilValue = { ["type"] = "nil", ["value"] = "nil" }
--[[ TO-DO: we could make getOpCode faster by using the opcode
numbers directly, or just getting it by table index and the
case-to-opcode multiplier (op * 227)
but tbh this runs just fine
]]
if opc == getOpCode("LOADNIL") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = nil", A)
elseif opc == getOpCode("BREAK") then
output = output .. "break"
elseif opc == getOpCode("LOADK") then
local k = proto.kTable[Bx + 1] or nilValue;
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = %s", A, (type(k.value) == "string") and ("\"" .. k.value .. "\"") or tostring(k.value))
elseif opc == getOpCode("LOADKX") then
local k = proto.kTable[aux + 1] or nilValue;
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = %s", A, (type(k.value) == "string") and ("\"" .. k.value .. "\"") or tostring(k.value))
elseif opc == getOpCode("LOADB") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = %s", A, tostring(B == 1))
elseif opc == getOpCode("LOADN") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = %s", A, tostring(Bx))
elseif opc == getOpCode("GETUPVAL") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = upvalues[%i]", A, B)
elseif opc == getOpCode("SETUPVAL") then
output = output .. string.format("upvalues[%i] = var%i", B, A)
elseif opc == getOpCode("MOVE") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i", A, B)
elseif opc == getOpCode("LEN") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = #var%i", A, B)
elseif opc == getOpCode("UNM") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = -var%i", A, B)
elseif opc == getOpCode("NOT") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = not var%i", A, B)
elseif opc == getOpCode("GETVARARGS") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = ...", A)
elseif opc == getOpCode("CONCAT") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i .. var%i", A, B, C)
elseif opc == getOpCode("AND") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i and var%i", A, B, C)
elseif opc == getOpCode("OR") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i or var%i", A, B, C)
elseif opc == getOpCode("ANDK") then
local k = proto.kTable[C + 1] or nilValue;
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i and %s", A, B, tostring(k.value))
elseif opc == getOpCode("ORK") then
local k = proto.kTable[C + 1] or nilValue;
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i or %s", A, B, tostring(k.value))
elseif opc == getOpCode("FASTCALL") then
output = output .. string.format("FASTCALL[id=%i]()", A, B);
elseif opc == getOpCode("FASTCALL2") then
output = output .. string.format("FASTCALL[id=%i]()", A, B);
elseif opc == getOpCode("FASTCALL2K") then
output = output .. string.format("FASTCALL[id=%i]()", A, B);
elseif opc == getOpCode("GETIMPORT") then
local indexCount = bit32.band(bit32.rshift(aux, 30), 0x3FF) -- 0x40000000 --> 1, 0x80000000 --> 2
local cacheIndex1 = bit32.band(bit32.rshift(aux, 20), 0x3FF)
local cacheIndex2 = bit32.band(bit32.rshift(aux, 10), 0x3FF)
local cacheIndex3 = bit32.band(bit32.rshift(aux, 0), 0x3FF)
if indexCount == 1 then
local k1 = proto.kTable[cacheIndex1 + 1];
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = %s", A, tostring(k1.value))
elseif indexCount == 2 then
local k1 = proto.kTable[cacheIndex1 + 1];
local k2 = proto.kTable[cacheIndex2 + 1];
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = %s[\"%s\"]", A, k1.value, tostring(k2.value))
elseif indexCount == 3 then
local k1 = proto.kTable[cacheIndex1 + 1];
local k2 = proto.kTable[cacheIndex2 + 1];
local k3 = proto.kTable[cacheIndex3 + 1];
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = %s[\"%s\"][\"%s\"]", A, k1.value, tostring(k2.value), tostring(k3.value))
else
error("[GETIMPORT] Too many entries");
end
elseif opc == getOpCode("GETGLOBAL") then
local k = proto.kTable[aux + 1] or nilValue;
output = output .. string.format("var%i = %s", A, tostring(k.value))
elseif opc == getOpCode("SETGLOBAL") then
local k = proto.kTable[aux + 1] or nilValue;
output = output .. string.format("%s = var%i", tostring(k.value), A)
elseif opc == getOpCode("GETTABLE") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i[var%i]", A, B, C)
elseif opc == getOpCode("SETTABLE") then
output = output .. string.format("var%i[var%i] = var%i", B, C, A)
elseif opc == getOpCode("GETTABLEN") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i[%i]", A, B, C - 1)
elseif opc == getOpCode("SETTABLEN") then
output = output .. string.format("var%i[%i] = var%i", B, C - 1, A)
elseif opc == getOpCode("GETTABLEKS") then
local k = proto.kTable[aux + 1] or nilValue;
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i[%s]", A, B, (type(k.value) == "string") and ("\"" .. k.value .. "\"") or tostring(k.value))
elseif opc == getOpCode("SETTABLEKS") then
local k = proto.kTable[aux + 1] or nilValue;
output = output .. string.format("var%i[%s] = var%i", B, (type(k.value) == "string") and ("\"" .. k.value .. "\"") or tostring(k.value), A)
elseif opc == getOpCode("NAMECALL") then
local k = proto.kTable[aux + 1] or nilValue;
nameCall = string.format("var%i:%s", B, tostring(k.value))
markedAux = true;
elseif opc == getOpCode("NFORPREP") then
output = output .. string.format("nforprep start - [escape at #%i] -- var%i = iterator", (codeIndex + sBx) + 1, A + 3);
elseif opc == getOpCode("NFORLOOP") then
output = output .. string.format("nforloop end - iterate + goto #%i", codeIndex + sBx);
elseif opc == getOpCode("PAIRSPREP") then
output = output .. string.format("pairsprep start - [escape at #%i] -- var%i = key, var%i = value", (codeIndex + sBx) + 1, A + 3, A + 4);
elseif opc == getOpCode("PAIRSLOOP") then
output = output .. string.format("pairsloop end - iterate + goto #%i", codeIndex + sBx);
elseif opc == getOpCode("IPAIRSPREP") then
output = output .. string.format("ipairsprep start [escape at #%i] -- var%i = key, var%i = value", (codeIndex + sBx) + 1, A + 3, A + 4);
elseif opc == getOpCode("IPAIRSLOOP") then
output = output .. string.format("ipairsloop end - iterate + goto #%i", codeIndex + sBx);
elseif opc == getOpCode("TFORLOOP") then
output = output .. string.format("gforloop - iterate + goto #%i", codeIndex + aux);
elseif opc == getOpCode("JUMP") then
addReference(codeIndex, codeIndex + sBx);
output = output .. string.format("goto #%i", codeIndex + sBx);
elseif opc == getOpCode("JUMPBACK") then
addReference(codeIndex, codeIndex + sBx);
output = output .. string.format("goto #%i", codeIndex + sBx);
elseif opc == getOpCode("JUMPX") then
addReference(codeIndex, codeIndex + sBx);
output = output .. string.format("goto #%i", codeIndex + sAx);
elseif opc == getOpCode("JUMPIFEQK") then
local k = proto.kTable[aux + 1] or nilValue;
addReference(codeIndex, codeIndex + sBx);
output = output .. string.format("goto #%i if var%i == %s", codeIndex + sBx, A, (type(k.value) == "string") and ("\"" .. k.value .. "\"") or tostring(k.value));
elseif opc == getOpCode("JUMPIFNOTEQK") then
local k = proto.kTable[aux + 1] or nilValue;
addReference(codeIndex, codeIndex + sBx);
output = output .. string.format("goto #%i if var%i ~= %s", codeIndex + sBx, A, (type(k.value) == "string") and ("\"" .. k.value .. "\"") or tostring(k.value));
elseif opc == getOpCode("JUMPIF") then
addReference(codeIndex, codeIndex + sBx);
output = output .. string.format("goto #%i if var%i", codeIndex + sBx, A);
elseif opc == getOpCode("JUMPIFNOT") then
addReference(codeIndex, codeIndex + sBx);
output = output .. string.format("goto #%i if not var%i", codeIndex + sBx, A);
elseif opc == getOpCode("JUMPIFEQ") then
addReference(codeIndex, codeIndex + sBx);
output = output .. string.format("goto #%i if var%i == var%i", codeIndex + sBx, A, aux);
elseif opc == getOpCode("JUMPIFNOTEQ") then
addReference(codeIndex, codeIndex + sBx);
output = output .. string.format("goto #%i if var%i ~= var%i", codeIndex + sBx, A, aux);
elseif opc == getOpCode("JUMPIFLE") then
addReference(codeIndex, codeIndex + sBx);
output = output .. string.format("goto #%i if var%i <= var%i", codeIndex + sBx, A, aux);
elseif opc == getOpCode("JUMPIFNOTLE") then
addReference(codeIndex, codeIndex + sBx);
output = output .. string.format("goto #%i if var%i > var%i", codeIndex + sBx, A, aux);
elseif opc == getOpCode("JUMPIFLT") then
addReference(codeIndex, codeIndex + sBx);
output = output .. string.format("goto #%i if var%i < var%i", codeIndex + sBx, A, aux);
elseif opc == getOpCode("JUMPIFNOTLT") then
addReference(codeIndex, codeIndex + sBx);
output = output .. string.format("goto #%i if var%i >= var%i", codeIndex + sBx, A, aux);
elseif opc == getOpCode("ADD") then
output = output .. string.format("var%i = var%i + var%i", A, B, C);
elseif opc == getOpCode("ADDK") then
local k = proto.kTable[C + 1] or nilValue;
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i + %s", A, B, tostring(k.value));
elseif opc == getOpCode("SUB") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i - var%i", A, B, C);
elseif opc == getOpCode("SUBK") then
local k = proto.kTable[C + 1] or nilValue;
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i - %s", A, B, tostring(k.value));
elseif opc == getOpCode("MUL") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i * var%i", A, B, C);
elseif opc == getOpCode("MULK") then
local k = proto.kTable[C + 1] or nilValue;
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i * %s", A, B, tostring(k.value));
elseif opc == getOpCode("DIV") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i / var%i", A, B, C);
elseif opc == getOpCode("DIVK") then
local k = proto.kTable[C + 1] or nilValue;
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i / %s", A, B, tostring(k.value));
elseif opc == getOpCode("MOD") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i %% var%i", A, B, C);
elseif opc == getOpCode("MODK") then
local k = proto.kTable[C + 1] or nilValue;
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i %% %s", A, B, tostring(k.value));
elseif opc == getOpCode("POW") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i ^ var%i", A, B, C);
elseif opc == getOpCode("POWK") then
local k = proto.kTable[C + 1] or nilValue;
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = var%i ^ %s", A, B, tostring(k.value));
elseif opc == getOpCode("CALL") then
if C > 1 then
for j = 1, C - 1 do
output = output .. string.format("var%i", A + j - 1)
if j < C - 1 then output = output .. ", " end
end
output = output .. " = "
elseif C == 0 then
output = output .. string.format("var%i, ...", A);
output = output .. " = "
--for j = 1, proto.maxStackSize do
-- output = output .. string.format("var%i", A + j - 1)
-- if j < proto.maxStackSize - 1 then output = output .. ", " end
--end
end
if nameCall then
output = output .. nameCall .. "(";
else
output = output .. string.format("var%i(", A)
end
if B > 1 then
if nameCall then
for j = 1, B - 2 do
output = output .. string.format("var%i", A + 1 + j) -- exclude self
if j < B - 2 then output = output .. ", " end
end
else
for j = 1, B - 1 do
output = output .. string.format("var%i", A + j)
if j < B - 1 then output = output .. ", " end
end
end
elseif B == 0 then
output = output .. string.format("var%i, ...", A + 1);
--for j = 1, proto.maxStackSize do
-- if nameCall then
-- output = output .. string.format("var%i", A + 1 + j) -- exclude self
-- else
-- output = output .. string.format("var%i", A + j)
-- end
-- if j < proto.maxStackSize - 1 then output = output .. ", " end
--end
end
nameCall = nil;
output = output .. ")";
elseif opc == getOpCode("NEWTABLE") then
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = {}", A)
elseif opc == getOpCode("DUPTABLE") then
local t = proto.kTable[Bx + 1].value;
output = output .. (isVarDefined(A) and "" or "local ") .. string.format("var%i = { ", A)
for j = 1,t.size do
local id = t.ids[j];
local k = proto.kTable[id];
output = output .. ((type(k.value) == "string") and ("\"" .. k.value .. "\"") or tostring(k.value))
if j < t.size then
output = output .. ", ";
end
end
output = output .. "}";
elseif opc == getOpCode("SETLIST") then
local fieldSize = aux;
output = output .. "\n"
for j = 1, C do
addTabSpace(depth);
output = output .. string.format("var%i[%i] = var%i\n", A, j + fieldSize - 1, B + j - 1);
end
elseif opc == getOpCode("CAPTURE") then
markedAux = true;
elseif opc == getOpCode("NEWCLOSURE") then
output = output .. "\n"
local nCaptures = 0;
for j = codeIndex + 1, proto.sizeCode do
if luau.GET_OPCODE(proto.codeTable[j]) ~= getOpCode("CAPTURE") then
break
else
local upvalueIndex = j - codeIndex - 1;
local captureType = luau.GETARG_A(proto.codeTable[j]);
local captureIndex = luau.GETARG_Bx(proto.codeTable[j]);
nCaptures = nCaptures + 1;
addTabSpace(depth);
if captureType == 0 or captureType == 1 then
output = output .. string.format("-- V nested upvalues[%i] = var%i\n", upvalueIndex, captureIndex)
elseif captureType == 2 then
output = output .. string.format("-- V nested upvalues[%i] = upvalues[%i]\n", upvalueIndex, captureIndex)
else
error("[NEWCLOSURE] Invalid capture type");
end
end
end
codeIndex = codeIndex + nCaptures;
addTabSpace(depth);
local nextProto = proto.pTable[Bx + 1]
if nextProto.source then
output = output .. readProto(nextProto, depth)
addTabSpace(depth);
output = output .. string.format("var%i = ", A) .. nextProto.source
else
nextProto.source = nil;
output = output .. string.format("var%i = ", A) .. readProto(nextProto, depth)
end
elseif opc == getOpCode("DUPCLOSURE") then
output = output .. "\n"
local nCaptures = 0;
for j = codeIndex + 1, proto.sizeCode do
if luau.GET_OPCODE(proto.codeTable[j]) ~= getOpCode("CAPTURE") then
break
else
local upvalueIndex = j - codeIndex - 1;
local captureType = luau.GETARG_A(proto.codeTable[j]);
local captureIndex = luau.GETARG_Bx(proto.codeTable[j]);
nCaptures = nCaptures + 1;
addTabSpace(depth);
if captureType == 0 or captureType == 1 then
output = output .. string.format("-- V nested upvalues[%i] = var%i\n", upvalueIndex, captureIndex)
elseif captureType == 2 then
output = output .. string.format("-- V nested upvalues[%i] = upvalues[%i]\n", upvalueIndex, captureIndex)
else
error("[DUPCLOSURE] Invalid capture type");
end
end
end
codeIndex = codeIndex + nCaptures;
addTabSpace(depth);
local nextProto = protoTable[proto.kTable[Bx + 1].value]
if nextProto.source then
output = output .. readProto(nextProto, depth)
addTabSpace(depth);
output = output .. string.format("var%i = ", A) .. nextProto.source
else
nextProto.source = nil;
output = output .. string.format("var%i = ", A) .. readProto(nextProto, depth)
end
elseif opc == getOpCode("RETURN") then
if B > 1 then
output = output .. "return ";
for j = 1, B - 1 do
output = output .. string.format("var%i", A + j)
if j < B - 1 then output = output .. ", " end
end
elseif B == 0 then
output = output .. string.format("var%i, ...", A)
end
end
for _,v in pairs(refData) do
if v.codeIndex == codeIndex then
output = output .. " -- referenced by "
for j = 1,#v.refs do
output = output .. "#" .. v.refs[j]
if j < #v.refs then
output = output .. ", "
end
end
end
end
output = output .. "\n"
end
codeIndex = codeIndex + 1
end
depth = depth - 1
addTabSpace(depth)
output = output .. "end\n"
return output;
end
local startDepth = 0;
output = output .. readProto(mainProto, startDepth)
return output
end
return disassemble