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
|
/*
* Copyright (C) 2016-2024 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "JSToWasm.h"
#include "WasmCallee.h"
#include <wtf/Gigacage.h>
#include <wtf/WTFConfig.h>
#if ENABLE(WEBASSEMBLY) && ENABLE(JIT)
#include "CCallHelpers.h"
#include "JSCJSValueInlines.h"
#include "JSWebAssemblyInstance.h"
#include "MaxFrameExtentForSlowPathCall.h"
#include "WasmCallingConvention.h"
#include "WasmContext.h"
#include "WasmOperations.h"
#include "WasmToJS.h"
namespace JSC {
namespace Wasm {
void marshallJSResult(CCallHelpers& jit, const TypeDefinition& typeDefinition, const CallInformation& wasmFrameConvention, const RegisterAtOffsetList& savedResultRegisters, CCallHelpers::JumpList& exceptionChecks)
{
const auto& signature = *typeDefinition.as<FunctionSignature>();
auto boxNativeCalleeResult = [](CCallHelpers& jit, Type type, ValueLocation src, JSValueRegs dst) {
JIT_COMMENT(jit, "boxNativeCalleeResult ", type);
switch (type.kind) {
case TypeKind::Void:
jit.moveTrustedValue(jsUndefined(), dst);
break;
case TypeKind::I32:
jit.zeroExtend32ToWord(src.jsr().payloadGPR(), dst.payloadGPR());
jit.boxInt32(dst.payloadGPR(), dst, DoNotHaveTagRegisters);
break;
case TypeKind::F32:
jit.convertFloatToDouble(src.fpr(), src.fpr());
FALLTHROUGH;
case TypeKind::F64: {
jit.moveTrustedValue(jsNumber(PNaN), dst);
auto isNaN = jit.branchIfNaN(src.fpr());
#if USE(JSVALUE64)
jit.boxDouble(src.fpr(), dst, DoNotHaveTagRegisters);
#else
jit.boxDouble(src.fpr(), dst);
#endif
isNaN.link(&jit);
break;
}
default: {
if (isRefType(type))
jit.moveValueRegs(src.jsr(), dst);
else
jit.breakpoint();
}
}
};
if (signature.returnsVoid())
jit.moveTrustedValue(jsUndefined(), JSRInfo::returnValueJSR);
else if (signature.returnCount() == 1) {
if (signature.returnType(0).isI64()) {
JIT_COMMENT(jit, "convert wasm return to big int");
JSValueRegs inputJSR = wasmFrameConvention.results[0].location.jsr();
jit.prepareWasmCallOperation(GPRInfo::wasmContextInstancePointer);
jit.setupArguments<decltype(operationConvertToBigInt)>(GPRInfo::wasmContextInstancePointer, inputJSR);
jit.callOperation<OperationPtrTag>(operationConvertToBigInt);
} else
boxNativeCalleeResult(jit, signature.returnType(0), wasmFrameConvention.results[0].location, JSRInfo::returnValueJSR);
} else {
IndexingType indexingType = ArrayWithUndecided;
JSValueRegs scratchJSR = JSValueRegs {
#if USE(JSVALUE32_64)
wasmCallingConvention().prologueScratchGPRs[2],
#endif
wasmCallingConvention().prologueScratchGPRs[1]
};
ASSERT(scratchJSR.payloadGPR() != GPRReg::InvalidGPRReg);
#if USE(JSVALUE32_64)
ASSERT(scratchJSR.tagGPR() != GPRReg::InvalidGPRReg);
ASSERT(scratchJSR.payloadGPR() != scratchJSR.tagGPR());
#endif
// We can use the first floating point register as a scratch since it will always be moved onto the stack before other values.
FPRReg fprScratch = wasmCallingConvention().fprArgs[0];
JIT_COMMENT(jit, "scratchFPR: ", fprScratch, " - Scratch jsr: ", scratchJSR, " - saved result registers: ", savedResultRegisters);
bool hasI64 = false;
for (unsigned i = 0; i < signature.returnCount(); ++i) {
ValueLocation loc = wasmFrameConvention.results[i].location;
Type type = signature.returnType(i);
hasI64 |= type.isI64();
if (loc.isGPR() || loc.isFPR()) {
#if USE(JSVALUE32_64)
ASSERT(!loc.isGPR() || savedResultRegisters.find(loc.jsr().payloadGPR())->offset() + 4 == savedResultRegisters.find(loc.jsr().tagGPR())->offset());
#endif
auto address = CCallHelpers::Address(CCallHelpers::stackPointerRegister, wasmFrameConvention.headerAndArgumentStackSizeInBytes);
switch (type.kind) {
case TypeKind::F32:
case TypeKind::F64:
boxNativeCalleeResult(jit, type, loc, scratchJSR);
jit.storeValue(scratchJSR, address.withOffset(savedResultRegisters.find(loc.fpr())->offset()));
break;
case TypeKind::I64:
jit.storeValue(loc.jsr(), address.withOffset(savedResultRegisters.find(loc.jsr().payloadGPR())->offset()));
break;
default:
boxNativeCalleeResult(jit, type, loc, scratchJSR);
jit.storeValue(scratchJSR, address.withOffset(savedResultRegisters.find(loc.jsr().payloadGPR())->offset()));
break;
}
} else {
if (!type.isI64()) {
auto location = CCallHelpers::Address(CCallHelpers::stackPointerRegister, loc.offsetFromSP());
ValueLocation tmp;
switch (type.kind) {
case TypeKind::F32:
tmp = ValueLocation { fprScratch };
jit.loadFloat(location, fprScratch);
break;
case TypeKind::F64:
tmp = ValueLocation { fprScratch };
jit.loadDouble(location, fprScratch);
break;
case TypeKind::I32:
tmp = ValueLocation { scratchJSR };
jit.load32(location, scratchJSR.payloadGPR());
break;
default:
tmp = ValueLocation { scratchJSR };
jit.loadValue(location, scratchJSR);
break;
}
boxNativeCalleeResult(jit, type, tmp, scratchJSR);
jit.storeValue(scratchJSR, location);
}
}
switch (type.kind) {
case TypeKind::I32:
indexingType = leastUpperBoundOfIndexingTypes(indexingType, ArrayWithInt32);
break;
case TypeKind::F32:
case TypeKind::F64:
indexingType = leastUpperBoundOfIndexingTypes(indexingType, ArrayWithDouble);
break;
default:
indexingType = leastUpperBoundOfIndexingTypes(indexingType, ArrayWithContiguous);
break;
}
}
// Now, all return values are stored in memory. So we can call functions can clobber caller-save registers.
// This is required to convert values to BigInt.
if (hasI64) {
for (unsigned i = 0; i < signature.returnCount(); ++i) {
ValueLocation loc = wasmFrameConvention.results[i].location;
Type type = signature.returnType(i);
if (!type.isI64())
continue;
constexpr JSValueRegs valueJSR = preferredArgumentJSR<decltype(operationConvertToBigInt), 1>();
CCallHelpers::Address address { CCallHelpers::stackPointerRegister };
if (loc.isGPR() || loc.isFPR()) {
#if USE(JSVALUE32_64)
ASSERT(savedResultRegisters.find(loc.jsr().payloadGPR())->offset() + 4 == savedResultRegisters.find(loc.jsr().tagGPR())->offset());
#endif
address = address.withOffset(savedResultRegisters.find(loc.jsr().payloadGPR())->offset() + wasmFrameConvention.headerAndArgumentStackSizeInBytes);
} else
address = address.withOffset(loc.offsetFromSP());
jit.loadValue(address, valueJSR);
jit.prepareWasmCallOperation(GPRInfo::wasmContextInstancePointer);
jit.setupArguments<decltype(operationConvertToBigInt)>(GPRInfo::wasmContextInstancePointer, valueJSR);
jit.callOperation<OperationPtrTag>(operationConvertToBigInt);
jit.storeValue(JSRInfo::returnValueJSR, address);
}
}
constexpr GPRReg savedResultsGPR = preferredArgumentGPR<decltype(operationAllocateResultsArray), 3>();
jit.move(CCallHelpers::stackPointerRegister, savedResultsGPR);
if constexpr (!!maxFrameExtentForSlowPathCall)
jit.subPtr(CCallHelpers::TrustedImm32(maxFrameExtentForSlowPathCall), CCallHelpers::stackPointerRegister);
static_assert(GPRInfo::wasmContextInstancePointer != savedResultsGPR);
jit.prepareWasmCallOperation(GPRInfo::wasmContextInstancePointer);
jit.setupArguments<decltype(operationAllocateResultsArray)>(GPRInfo::wasmContextInstancePointer, CCallHelpers::TrustedImmPtr(&typeDefinition), indexingType, savedResultsGPR);
JIT_COMMENT(jit, "operationAllocateResultsArray");
jit.callOperation<OperationPtrTag>(operationAllocateResultsArray);
exceptionChecks.append(jit.branchTestPtr(CCallHelpers::NonZero, GPRInfo::returnValueGPR2));
if constexpr (!!maxFrameExtentForSlowPathCall)
jit.addPtr(CCallHelpers::TrustedImm32(maxFrameExtentForSlowPathCall), CCallHelpers::stackPointerRegister);
jit.boxCell(GPRInfo::returnValueGPR, JSRInfo::returnValueJSR);
}
}
std::shared_ptr<InternalFunction> createJSToWasmJITInterpreterCrashForSIMDParameters()
{
static LazyNeverDestroyed<std::shared_ptr<InternalFunction>> thunk;
static std::once_flag onceKey;
std::call_once(onceKey, [&] {
CCallHelpers jit;
JIT_COMMENT(jit, "jsToWasm interpreted wrapper");
thunk.construct(std::make_shared<InternalFunction>());
jit.emitFunctionPrologue();
jit.loadPtr(CCallHelpers::addressFor(CallFrameSlot::codeBlock), GPRInfo::wasmContextInstancePointer);
JIT_COMMENT(jit, "Throw an exception because this function uses v128");
emitThrowWasmToJSException(jit, GPRInfo::wasmContextInstancePointer, ExceptionType::TypeErrorInvalidV128Use);
LinkBuffer linkBuffer(jit, nullptr, LinkBuffer::Profile::WasmThunk, JITCompilationCanFail);
if (UNLIKELY(linkBuffer.didFailToAllocate()))
RELEASE_ASSERT(false);
thunk->get()->entrypoint.compilation = makeUnique<Compilation>(
FINALIZE_WASM_CODE(linkBuffer, JITCompilationPtrTag, nullptr, "JS->WebAssembly interpreted error entrypoint"),
nullptr);
});
return thunk;
}
std::shared_ptr<InternalFunction> createJSToWasmJITInterpreter()
{
static LazyNeverDestroyed<std::shared_ptr<InternalFunction>> thunk;
static std::once_flag onceKey;
std::call_once(onceKey, [&] {
// JIT version of js_to_wasm_wrapper_entry
// If you change this, make sure to modify WebAssembly.asm:op(js_to_wasm_wrapper_entry)
CCallHelpers jit;
CCallHelpers::JumpList exceptionChecks;
JIT_COMMENT(jit, "jsToWasm interpreted wrapper");
thunk.construct(std::make_shared<InternalFunction>());
jit.emitFunctionPrologue();
// saveJSEntrypointInterpreterRegisters
jit.subPtr(CCallHelpers::TrustedImmPtr(Wasm::JITLessJSEntrypointCallee::SpillStackSpaceAligned), CCallHelpers::stackPointerRegister);
#if CPU(ARM64) || CPU(ARM64E) || CPU(X86_64)
CCallHelpers::Address memBaseSlot { GPRInfo::callFrameRegister, -2 * static_cast<long>(sizeof(Register)) };
CCallHelpers::Address wasmInstanceSlot { GPRInfo::callFrameRegister, -3 * static_cast<long>(sizeof(Register)) };
jit.storePair64(GPRInfo::wasmBaseMemoryPointer, GPRInfo::wasmBoundsCheckingSizeRegister, memBaseSlot);
jit.store64(GPRInfo::wasmContextInstancePointer, wasmInstanceSlot);
#else
CCallHelpers::Address wasmInstanceSlot { GPRInfo::callFrameRegister, -1 * static_cast<long>(sizeof(Register)) };
jit.store32(GPRInfo::wasmContextInstancePointer, wasmInstanceSlot);
#endif
{
// Callee[cfr]
CCallHelpers::Address functionSlot { GPRInfo::callFrameRegister, sizeof(CPURegister) * 2 + sizeof(Register) };
jit.loadPtr(functionSlot, GPRInfo::regWS0);
}
{
CCallHelpers::Address calleeSlot { GPRInfo::regWS0, WebAssemblyFunction::offsetOfJSToWasmCallee() };
jit.loadPtr(calleeSlot, GPRInfo::regWS0);
}
#if ASSERT_ENABLED
{
CCallHelpers::Address identSlot { GPRInfo::regWS0, JITLessJSEntrypointCallee::offsetOfIdent() };
jit.load32(identSlot, GPRInfo::regWS1);
jit.move(MacroAssembler::TrustedImm32(0xBF), GPRInfo::regWA0);
auto ok = jit.branch32(CCallHelpers::Equal, GPRInfo::regWS1, GPRInfo::regWA0);
jit.breakpoint();
ok.link(&jit);
}
#endif
// Allocate stack space (no stack check)
{
CCallHelpers::Address frameSlot { GPRInfo::regWS0, JITLessJSEntrypointCallee::offsetOfFrameSize() };
jit.load32(frameSlot, GPRInfo::regWS1);
jit.subPtr(GPRInfo::regWS1, CCallHelpers::stackPointerRegister);
}
// Prepare frame
jit.setupArguments<decltype(operationJSToWasmEntryWrapperBuildFrame)>(CCallHelpers::stackPointerRegister, GPRInfo::callFrameRegister);
jit.callOperation<OperationPtrTag>(operationJSToWasmEntryWrapperBuildFrame);
// Instance
{
CCallHelpers::Address instanceSlot { GPRInfo::callFrameRegister, CallFrameSlot::codeBlock * 8 };
jit.loadPtr(instanceSlot, GPRInfo::wasmContextInstancePointer);
}
// Memory
{
#if CPU(ARM64) || CPU(ARM64E) || CPU(X86_64)
jit.loadPair64(GPRInfo::wasmContextInstancePointer, CCallHelpers::TrustedImm32(JSWebAssemblyInstance::offsetOfCachedMemory()), GPRInfo::wasmBaseMemoryPointer, GPRInfo::wasmBoundsCheckingSizeRegister);
#elif CPU(X86_64)
jit.loadPtr(CCallHelpers::Address { GPRInfo::wasmBaseMemoryPointer, JSWebAssemblyInstance::offsetOfCachedMemory() }, GPRInfo::wasmContextInstancePointer);
jit.loadPtr(CCallHelpers::Address { GPRInfo::wasmBoundsCheckingSizeRegister, JSWebAssemblyInstance::offsetOfCachedBoundsCheckingSize() }, GPRInfo::wasmContextInstancePointer);
#endif
#if !CPU(ARMv7)
#if GIGACAGE_ENABLED && !ENABLE(C_LOOP)
// cagePrimitive(GigacageConfig + Gigacage::Config::basePtrs + GigacagePrimitiveBasePtrOffset, constexpr Gigacage::primitiveGigacageMask, ptr, scratch)
auto gigacageConfig = bitwise_cast<uint8_t*>(&WebConfig::g_config) + static_cast<ptrdiff_t>(Gigacage::startOffsetOfGigacageConfig);
auto gigacageDisablingPrimitiveIsForbidden = gigacageConfig + OBJECT_OFFSETOF(Gigacage::Config, disablingPrimitiveGigacageIsForbidden);
jit.load8(gigacageDisablingPrimitiveIsForbidden, GPRInfo::regWS0);
auto doCaging = jit.branch32(CCallHelpers::NotEqual, GPRInfo::regWS0, MacroAssembler::TrustedImm32(0));
jit.load8(&Gigacage::disablePrimitiveGigacageRequested, GPRInfo::regWS0);
auto done = jit.branch32(CCallHelpers::NotEqual, GPRInfo::regWS0, MacroAssembler::TrustedImm32(0));
doCaging.link(&jit);
// cage()
auto basePtr = gigacageConfig + OBJECT_OFFSETOF(Gigacage::Config, basePtrs) + Gigacage::offsetOfPrimitiveGigacageBasePtr;
auto mask = Gigacage::primitiveGigacageMask;
jit.loadPtr(basePtr, GPRInfo::regWS0);
auto cageDone = jit.branch64(CCallHelpers::Equal, GPRInfo::regWS0, MacroAssembler::TrustedImm32(0));
jit.andPtr(MacroAssembler::TrustedImmPtr(mask), GPRInfo::wasmBaseMemoryPointer);
jit.addPtr(GPRInfo::regWS0, GPRInfo::wasmBaseMemoryPointer);
cageDone.link(&jit);
done.link(&jit);
#endif
#endif
}
#if CPU(ARM64) || CPU(ARM64E)
jit.loadPair64(CCallHelpers::Address { CCallHelpers::stackPointerRegister, 0 * 8 }, GPRInfo::regWA0, GPRInfo::regWA1);
jit.loadPair64(CCallHelpers::Address { CCallHelpers::stackPointerRegister, 2 * 8 }, GPRInfo::regWA2, GPRInfo::regWA3);
jit.loadPair64(CCallHelpers::Address { CCallHelpers::stackPointerRegister, 4 * 8 }, GPRInfo::regWA4, GPRInfo::regWA5);
jit.loadPair64(CCallHelpers::Address { CCallHelpers::stackPointerRegister, 6 * 8 }, GPRInfo::regWA6, GPRInfo::regWA7);
#elif CPU(X86_64)
jit.loadPair64(CCallHelpers::Address { CCallHelpers::stackPointerRegister, 0 * 8 }, GPRInfo::regWA0, GPRInfo::regWA1);
jit.loadPair64(CCallHelpers::Address { CCallHelpers::stackPointerRegister, 2 * 8 }, GPRInfo::regWA2, GPRInfo::regWA3);
jit.loadPair64(CCallHelpers::Address { CCallHelpers::stackPointerRegister, 4 * 8 }, GPRInfo::regWA4, GPRInfo::regWA5);
#elif USE(JSVALUE64)
jit.load64(CCallHelpers::Address { CCallHelpers::stackPointerRegister, 0 * 8 }, GPRInfo::regWA0);
jit.load64(CCallHelpers::Address { CCallHelpers::stackPointerRegister, 1 * 8 }, GPRInfo::regWA1);
jit.load64(CCallHelpers::Address { CCallHelpers::stackPointerRegister, 2 * 8 }, GPRInfo::regWA2);
jit.load64(CCallHelpers::Address { CCallHelpers::stackPointerRegister, 3 * 8 }, GPRInfo::regWA3);
jit.load64(CCallHelpers::Address { CCallHelpers::stackPointerRegister, 4 * 8 }, GPRInfo::regWA4);
jit.load64(CCallHelpers::Address { CCallHelpers::stackPointerRegister, 5 * 8 }, GPRInfo::regWA5);
#else
jit.loadPair32(CCallHelpers::stackPointerRegister, MacroAssembler::TrustedImm32(0*8), GPRInfo::regWA0, GPRInfo::regWA1);
jit.loadPair32(CCallHelpers::stackPointerRegister, MacroAssembler::TrustedImm32(1*8), GPRInfo::regWA2, GPRInfo::regWA3);
#endif
#if CPU(ARM64) || CPU(ARM64E)
jit.loadPairDouble(CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 0) * 8 }, FPRInfo::argumentFPR0, FPRInfo::argumentFPR1);
jit.loadPairDouble(CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 2) * 8 }, FPRInfo::argumentFPR2, FPRInfo::argumentFPR3);
jit.loadPairDouble(CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 4) * 8 }, FPRInfo::argumentFPR4, FPRInfo::argumentFPR5);
jit.loadPairDouble(CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 6) * 8 }, FPRInfo::argumentFPR6, FPRInfo::argumentFPR7);
#elif CPU(X86_64) || CPU(RISCV64)
jit.loadDouble(CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 0) * 8 }, FPRInfo::argumentFPR0);
jit.loadDouble(CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 1) * 8 }, FPRInfo::argumentFPR1);
jit.loadDouble(CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 2) * 8 }, FPRInfo::argumentFPR2);
jit.loadDouble(CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 3) * 8 }, FPRInfo::argumentFPR3);
jit.loadDouble(CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 4) * 8 }, FPRInfo::argumentFPR4);
jit.loadDouble(CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 5) * 8 }, FPRInfo::argumentFPR5);
jit.loadDouble(CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 6) * 8 }, FPRInfo::argumentFPR6);
jit.loadDouble(CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 7) * 8 }, FPRInfo::argumentFPR7);
#endif
// Pop argument space values
jit.addPtr(MacroAssembler::TrustedImmPtr(Wasm::JITLessJSEntrypointCallee::RegisterStackSpaceAligned), CCallHelpers::stackPointerRegister);
#if ASSERT_ENABLED
for (int32_t i = 0; i < 30; ++i)
jit.storePtr(MacroAssembler::TrustedImmPtr(0xbeef), CCallHelpers::Address { CCallHelpers::stackPointerRegister, -i * static_cast<int32_t>(sizeof(Register)) });
#endif
{
// Callee[cfr]
CCallHelpers::Address functionSlot { GPRInfo::callFrameRegister, sizeof(CPURegister) * 2 + sizeof(Register) };
jit.loadPtr(functionSlot, GPRInfo::regWS0);
#if USE(JSVALUE64)
jit.andPtr(MacroAssembler::TrustedImmPtr(~(JSValue::NativeCalleeTag)), GPRInfo::regWS0);
#endif
}
auto configPlusLowestAddress = bitwise_cast<uint8_t*>(&WebConfig::g_config) + static_cast<ptrdiff_t>(WTF::startOffsetOfWTFConfig + WTF::offsetOfWTFConfigLowestAccessibleAddress);
jit.move(MacroAssembler::TrustedImmPtr(configPlusLowestAddress), GPRInfo::regWS1);
jit.loadPtr(CCallHelpers::Address { GPRInfo::regWS1, 0 }, GPRInfo::regWS1);
jit.addPtr(GPRInfo::regWS1, GPRInfo::regWS0);
// Store Callee's wasm callee
#if USE(JSVALUE64)
jit.loadPtr(CCallHelpers::Address { GPRInfo::regWS0, JITLessJSEntrypointCallee::offsetOfWasmCallee() }, GPRInfo::regWS1);
jit.storePtr(GPRInfo::regWS1, CCallHelpers::Address { CCallHelpers::stackPointerRegister, (CallFrameSlot::callee - CallerFrameAndPC::sizeInRegisters) * 8 });
#else
jit.loadPtr(CCallHelpers::Address { GPRInfo::regWS0, JITLessJSEntrypointCallee::offsetOfWasmCallee() + PayloadOffset }, GPRInfo::regWS1);
jit.storePtr(GPRInfo::regWS1, CCallHelpers::Address { CCallHelpers::stackPointerRegister, (CallFrameSlot::callee - CallerFrameAndPC::sizeInRegisters) * 8 + PayloadOffset });
jit.loadPtr(CCallHelpers::Address { GPRInfo::regWS0, JITLessJSEntrypointCallee::offsetOfWasmCallee() + TagOffset }, GPRInfo::regWS1);
jit.storePtr(GPRInfo::regWS1, CCallHelpers::Address { CCallHelpers::stackPointerRegister, (CallFrameSlot::callee - CallerFrameAndPC::sizeInRegisters) * 8 + TagOffset });
#endif
jit.loadPtr(CCallHelpers::Address { GPRInfo::regWS0, JITLessJSEntrypointCallee::offsetOfWasmFunctionPrologue() }, GPRInfo::regWS0);
jit.call(GPRInfo::regWS0, WasmEntryPtrTag);
// Restore SP
{
// Callee[cfr]
CCallHelpers::Address calleeSlot { GPRInfo::callFrameRegister, sizeof(CPURegister) * 2 + sizeof(Register) };
jit.loadPtr(calleeSlot, GPRInfo::regWS0);
#if USE(JSVALUE64)
jit.andPtr(MacroAssembler::TrustedImmPtr(~(JSValue::NativeCalleeTag)), GPRInfo::regWS0);
#endif
}
jit.move(MacroAssembler::TrustedImmPtr(configPlusLowestAddress), GPRInfo::regWS1);
jit.loadPtr(CCallHelpers::Address { GPRInfo::regWS1, 0 }, GPRInfo::regWS1);
jit.addPtr(GPRInfo::regWS1, GPRInfo::regWS0);
jit.load32(CCallHelpers::Address { GPRInfo::regWS0, JITLessJSEntrypointCallee::offsetOfFrameSize() }, GPRInfo::regWS1);
jit.subPtr(GPRInfo::callFrameRegister, GPRInfo::regWS1, GPRInfo::regWS1);
jit.move(GPRInfo::regWS1, CCallHelpers::stackPointerRegister);
jit.subPtr(MacroAssembler::TrustedImmPtr(JITLessJSEntrypointCallee::SpillStackSpaceAligned), CCallHelpers::stackPointerRegister);
// Save return registers
#if CPU(ARM64) || CPU(ARM64E)
jit.storePair64(GPRInfo::regWA0, GPRInfo::regWA1, CCallHelpers::Address { CCallHelpers::stackPointerRegister, 0 * 8 });
jit.storePair64(GPRInfo::regWA2, GPRInfo::regWA3, CCallHelpers::Address { CCallHelpers::stackPointerRegister, 2 * 8 });
jit.storePair64(GPRInfo::regWA4, GPRInfo::regWA5, CCallHelpers::Address { CCallHelpers::stackPointerRegister, 4 * 8 });
jit.storePair64(GPRInfo::regWA6, GPRInfo::regWA7, CCallHelpers::Address { CCallHelpers::stackPointerRegister, 6 * 8 });
#elif CPU(X86_64)
jit.storePair64(GPRInfo::regWA0, GPRInfo::regWA1, CCallHelpers::Address { CCallHelpers::stackPointerRegister, 0 * 8 });
jit.storePair64(GPRInfo::regWA2, GPRInfo::regWA3, CCallHelpers::Address { CCallHelpers::stackPointerRegister, 2 * 8 });
jit.storePair64(GPRInfo::regWA4, GPRInfo::regWA5, CCallHelpers::Address { CCallHelpers::stackPointerRegister, 4 * 8 });
#elif USE(JSVALUE64)
jit.store64(GPRInfo::regWA0, CCallHelpers::Address { CCallHelpers::stackPointerRegister, 0 * 8 });
jit.store64(GPRInfo::regWA1, CCallHelpers::Address { CCallHelpers::stackPointerRegister, 1 * 8 });
jit.store64(GPRInfo::regWA2, CCallHelpers::Address { CCallHelpers::stackPointerRegister, 2 * 8 });
jit.store64(GPRInfo::regWA3, CCallHelpers::Address { CCallHelpers::stackPointerRegister, 3 * 8 });
jit.store64(GPRInfo::regWA4, CCallHelpers::Address { CCallHelpers::stackPointerRegister, 4 * 8 });
jit.store64(GPRInfo::regWA5, CCallHelpers::Address { CCallHelpers::stackPointerRegister, 5 * 8 });
#else
jit.storePair32(GPRInfo::regWA0, GPRInfo::regWA1, CCallHelpers::Address { CCallHelpers::stackPointerRegister, 0 * 8 });
jit.storePair32(GPRInfo::regWA2, GPRInfo::regWA3, CCallHelpers::Address { CCallHelpers::stackPointerRegister, 1 * 8 });
#endif
#if CPU(ARM64) || CPU(ARM64E)
jit.storePairDouble(FPRInfo::argumentFPR0, FPRInfo::argumentFPR1, CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 0) * 8 });
jit.storePairDouble(FPRInfo::argumentFPR2, FPRInfo::argumentFPR3, CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 2) * 8 });
jit.storePairDouble(FPRInfo::argumentFPR4, FPRInfo::argumentFPR5, CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 4) * 8 });
jit.storePairDouble(FPRInfo::argumentFPR6, FPRInfo::argumentFPR7, CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 6) * 8 });
#elif CPU(X86_64) || CPU(RISCV64)
jit.storeDouble(FPRInfo::argumentFPR0, CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 0) * 8 });
jit.storeDouble(FPRInfo::argumentFPR1, CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 1) * 8 });
jit.storeDouble(FPRInfo::argumentFPR2, CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 2) * 8 });
jit.storeDouble(FPRInfo::argumentFPR3, CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 3) * 8 });
jit.storeDouble(FPRInfo::argumentFPR4, CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 4) * 8 });
jit.storeDouble(FPRInfo::argumentFPR5, CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 5) * 8 });
jit.storeDouble(FPRInfo::argumentFPR6, CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 6) * 8 });
jit.storeDouble(FPRInfo::argumentFPR7, CCallHelpers::Address { CCallHelpers::stackPointerRegister, (GPRInfo::numberOfArgumentRegisters + 7) * 8 });
#endif
// Prepare frame
jit.setupArguments<decltype(operationJSToWasmEntryWrapperBuildReturnFrame)>(CCallHelpers::stackPointerRegister, GPRInfo::callFrameRegister);
jit.callOperation<OperationPtrTag>(operationJSToWasmEntryWrapperBuildReturnFrame);
exceptionChecks.append(jit.branchTestPtr(CCallHelpers::NonZero, GPRInfo::returnValueGPR2));
// restoreJSEntrypointInterpreterRegisters
#if CPU(ARM64) || CPU(ARM64E) || CPU(X86_64)
jit.loadPair64(memBaseSlot, GPRInfo::wasmBaseMemoryPointer, GPRInfo::wasmBoundsCheckingSizeRegister);
jit.load64(wasmInstanceSlot, GPRInfo::wasmContextInstancePointer);
#else
jit.load32(wasmInstanceSlot, GPRInfo::wasmContextInstancePointer);
#endif
jit.addPtr(CCallHelpers::TrustedImmPtr(Wasm::JITLessJSEntrypointCallee::SpillStackSpaceAligned), CCallHelpers::stackPointerRegister);
jit.emitFunctionEpilogue();
jit.ret();
exceptionChecks.link(&jit);
jit.loadPtr(CCallHelpers::Address(GPRInfo::wasmContextInstancePointer, JSWebAssemblyInstance::offsetOfVM()), GPRInfo::argumentGPR0);
jit.copyCalleeSavesToVMEntryFrameCalleeSavesBuffer(GPRInfo::argumentGPR0);
jit.prepareWasmCallOperation(GPRInfo::wasmContextInstancePointer);
jit.setupArguments<decltype(operationWasmUnwind)>(GPRInfo::wasmContextInstancePointer);
jit.callOperation<OperationPtrTag>(operationWasmUnwind);
jit.farJump(GPRInfo::returnValueGPR, ExceptionHandlerPtrTag);
LinkBuffer linkBuffer(jit, nullptr, LinkBuffer::Profile::WasmThunk, JITCompilationCanFail);
if (UNLIKELY(linkBuffer.didFailToAllocate()))
RELEASE_ASSERT(false);
thunk->get()->entrypoint.compilation = makeUnique<Compilation>(
FINALIZE_WASM_CODE(linkBuffer, JITCompilationPtrTag, nullptr, "JS->WebAssembly interpreted entrypoint"),
nullptr);
});
return thunk;
}
std::unique_ptr<InternalFunction> createJSToWasmWrapper(CCallHelpers& jit, JSEntrypointCallee& entryCallee, Callee* wasmCallee, const TypeDefinition& typeDefinition, Vector<UnlinkedWasmToWasmCall>* unlinkedWasmToWasmCalls, const ModuleInformation& info, MemoryMode mode, unsigned functionIndex)
{
JIT_COMMENT(jit, "jsToWasm wrapper for wasm-function[", functionIndex, "] : ", typeDefinition);
auto result = makeUnique<InternalFunction>();
jit.emitFunctionPrologue();
// |codeBlock| and |this| slots are already initialized by the caller of this function because it is JS->Wasm transition.
jit.move(CCallHelpers::TrustedImmPtr(CalleeBits::boxNativeCallee(&entryCallee)), GPRInfo::nonPreservedNonReturnGPR);
CCallHelpers::Address calleeSlot { GPRInfo::callFrameRegister, CallFrameSlot::callee * sizeof(Register) };
jit.storePtr(GPRInfo::nonPreservedNonReturnGPR, calleeSlot.withOffset(PayloadOffset));
#if USE(JSVALUE32_64)
jit.store32(CCallHelpers::TrustedImm32(JSValue::NativeCalleeTag), calleeSlot.withOffset(TagOffset));
#endif
// Pessimistically save callee saves in BoundsChecking mode since the LLInt / single-pass BBQ always can clobber bound checks
RegisterSetBuilder toSave = RegisterSetBuilder::wasmPinnedRegisters();
#if ASSERT_ENABLED
unsigned toSaveSize = toSave.numberOfSetGPRs();
// They should all be callee saves.
toSave.filter(RegisterSetBuilder::calleeSaveRegisters());
ASSERT(toSave.numberOfSetGPRs() == toSaveSize);
#endif
RegisterAtOffsetList registersToSpill(toSave.buildAndValidate(), RegisterAtOffsetList::OffsetBaseType::FramePointerBased);
result->entrypoint.calleeSaveRegisters = registersToSpill;
size_t totalFrameSize = registersToSpill.sizeOfAreaInBytes();
#if USE(JSVALUE64)
ASSERT(totalFrameSize == toSave.numberOfSetGPRs() * sizeof(CPURegister));
#endif
CallInformation wasmFrameConvention = wasmCallingConvention().callInformationFor(typeDefinition);
RegisterAtOffsetList savedResultRegisters = wasmFrameConvention.computeResultsOffsetList();
totalFrameSize += wasmFrameConvention.headerAndArgumentStackSizeInBytes;
totalFrameSize += savedResultRegisters.sizeOfAreaInBytes();
totalFrameSize = WTF::roundUpToMultipleOf<stackAlignmentBytes()>(totalFrameSize);
JIT_COMMENT(jit, "Saved result registers: ", savedResultRegisters, "; Total frame size: ", totalFrameSize);
jit.subPtr(MacroAssembler::TrustedImm32(totalFrameSize), MacroAssembler::stackPointerRegister);
// We save all these registers regardless of having a memory or not.
// The reason is that we use one of these as a scratch. That said,
// almost all real wasm programs use memory, so it's not really
// worth optimizing for the case that they don't.
jit.emitSave(registersToSpill);
// https://webassembly.github.io/spec/js-api/index.html#exported-function-exotic-objects
// If parameters or results contain v128, throw a TypeError.
// Note: the above error is thrown each time the [[Call]] method is invoked.
if (Options::useWasmSIMD() && (wasmFrameConvention.argumentsOrResultsIncludeV128)) {
jit.loadPtr(CCallHelpers::addressFor(CallFrameSlot::codeBlock), GPRInfo::wasmContextInstancePointer);
JIT_COMMENT(jit, "Throw an exception because this function uses v128");
emitThrowWasmToJSException(jit, GPRInfo::wasmContextInstancePointer, ExceptionType::TypeErrorInvalidV128Use);
return result;
}
{
CallInformation jsFrameConvention = jsCallingConvention().callInformationFor(typeDefinition, CallRole::Callee);
CCallHelpers::Address calleeFrame = CCallHelpers::Address(MacroAssembler::stackPointerRegister, 0);
JSValueRegs scratchJSR {
#if USE(JSVALUE32_64)
wasmCallingConvention().prologueScratchGPRs[2],
#endif
wasmCallingConvention().prologueScratchGPRs[1]
};
jit.loadPtr(CCallHelpers::addressFor(CallFrameSlot::codeBlock), GPRInfo::wasmContextInstancePointer);
uintptr_t boxed = reinterpret_cast<uintptr_t>(CalleeBits::boxNativeCalleeIfExists(wasmCallee));
jit.storeWasmCalleeCallee(&boxed);
const auto& signature = *typeDefinition.as<FunctionSignature>();
for (unsigned i = 0; i < signature.argumentCount(); i++) {
RELEASE_ASSERT(jsFrameConvention.params[i].location.isStack());
Type type = signature.argumentType(i);
JIT_COMMENT(jit, "Arg ", i, " : ", type);
CCallHelpers::Address jsParam(GPRInfo::callFrameRegister, jsFrameConvention.params[i].location.offsetFromFP());
if (wasmFrameConvention.params[i].location.isStackArgument()) {
CCallHelpers::Address addr { calleeFrame.withOffset(wasmFrameConvention.params[i].location.offsetFromSP()) };
if (type.isI32() || type.isF32()) {
jit.load32(jsParam, scratchJSR.payloadGPR());
jit.store32(scratchJSR.payloadGPR(), addr.withOffset(PayloadOffset));
#if USE(JSVALUE32_64)
jit.store32(CCallHelpers::TrustedImm32(0), addr.withOffset(TagOffset));
#endif
} else {
jit.loadValue(jsParam, scratchJSR);
jit.storeValue(scratchJSR, addr);
}
} else {
if (type.isF32())
jit.loadFloat(jsParam, wasmFrameConvention.params[i].location.fpr());
else if (type.isF64())
jit.loadDouble(jsParam, wasmFrameConvention.params[i].location.fpr());
else if (type.isI32()) {
jit.load32(jsParam, wasmFrameConvention.params[i].location.jsr().payloadGPR());
#if USE(JSVALUE32_64)
jit.move(CCallHelpers::TrustedImm32(0), wasmFrameConvention.params[i].location.jsr().tagGPR());
#endif
} else
jit.loadValue(jsParam, wasmFrameConvention.params[i].location.jsr());
}
}
}
#if CPU(ARM) // ARM has no pinned registers for Wasm Memory, so no need to set them up
UNUSED_PARAM(mode);
#else
if (!!info.memory) {
GPRReg size = wasmCallingConvention().prologueScratchGPRs[0];
GPRReg scratch = wasmCallingConvention().prologueScratchGPRs[1];
if (isARM64E()) {
if (mode == MemoryMode::BoundsChecking)
size = GPRInfo::wasmBoundsCheckingSizeRegister;
jit.loadPairPtr(GPRInfo::wasmContextInstancePointer, CCallHelpers::TrustedImm32(JSWebAssemblyInstance::offsetOfCachedMemory()), GPRInfo::wasmBaseMemoryPointer, size);
} else {
if (mode == MemoryMode::BoundsChecking)
jit.loadPairPtr(GPRInfo::wasmContextInstancePointer, CCallHelpers::TrustedImm32(JSWebAssemblyInstance::offsetOfCachedMemory()), GPRInfo::wasmBaseMemoryPointer, GPRInfo::wasmBoundsCheckingSizeRegister);
else
jit.loadPtr(CCallHelpers::Address(GPRInfo::wasmContextInstancePointer, JSWebAssemblyInstance::offsetOfCachedMemory()), GPRInfo::wasmBaseMemoryPointer);
}
jit.cageConditionally(Gigacage::Primitive, GPRInfo::wasmBaseMemoryPointer, size, scratch);
}
#endif
CCallHelpers::Call call = jit.threadSafePatchableNearCall();
unsigned functionIndexSpace = functionIndex + info.importFunctionCount();
ASSERT(functionIndexSpace < info.functionIndexSpaceSize());
jit.addLinkTask([unlinkedWasmToWasmCalls, call, functionIndexSpace] (LinkBuffer& linkBuffer) {
unlinkedWasmToWasmCalls->append({ linkBuffer.locationOfNearCall<WasmEntryPtrTag>(call), functionIndexSpace, { } });
});
// Restore stack pointer after call
jit.addPtr(MacroAssembler::TrustedImm32(-static_cast<int32_t>(totalFrameSize)), MacroAssembler::framePointerRegister, MacroAssembler::stackPointerRegister);
CCallHelpers::JumpList exceptionChecks;
JIT_COMMENT(jit, "marshallJSResult");
marshallJSResult(jit, typeDefinition, wasmFrameConvention, savedResultRegisters, exceptionChecks);
JIT_COMMENT(jit, "restore registersToSpill");
jit.emitRestore(registersToSpill);
jit.emitFunctionEpilogue();
jit.ret();
exceptionChecks.link(&jit);
jit.loadPtr(CCallHelpers::Address(GPRInfo::wasmContextInstancePointer, JSWebAssemblyInstance::offsetOfVM()), GPRInfo::argumentGPR0);
jit.copyCalleeSavesToVMEntryFrameCalleeSavesBuffer(GPRInfo::argumentGPR0);
jit.prepareWasmCallOperation(GPRInfo::wasmContextInstancePointer);
jit.setupArguments<decltype(operationWasmUnwind)>(GPRInfo::wasmContextInstancePointer);
jit.callOperation<OperationPtrTag>(operationWasmUnwind);
jit.farJump(GPRInfo::returnValueGPR, ExceptionHandlerPtrTag);
return result;
}
} } // namespace JSC::Wasm
#endif // ENABLE(WEBASSEMBLY) && ENABLE(JIT)
|
