1 //===---- MachO_arm64.cpp - JIT linker implementation for MachO/arm64 -----===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // MachO/arm64 jit-link implementation. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "llvm/ExecutionEngine/JITLink/MachO_arm64.h" 14 #include "llvm/ExecutionEngine/JITLink/DWARFRecordSectionSplitter.h" 15 #include "llvm/ExecutionEngine/JITLink/aarch64.h" 16 17 #include "MachOLinkGraphBuilder.h" 18 19 #define DEBUG_TYPE "jitlink" 20 21 using namespace llvm; 22 using namespace llvm::jitlink; 23 24 namespace { 25 26 class MachOLinkGraphBuilder_arm64 : public MachOLinkGraphBuilder { 27 public: 28 MachOLinkGraphBuilder_arm64(const object::MachOObjectFile &Obj, 29 SubtargetFeatures Features) 30 : MachOLinkGraphBuilder(Obj, Triple("arm64-apple-darwin"), 31 std::move(Features), aarch64::getEdgeKindName), 32 NumSymbols(Obj.getSymtabLoadCommand().nsyms) {} 33 34 private: 35 enum MachOARM64RelocationKind : Edge::Kind { 36 MachOBranch26 = Edge::FirstRelocation, 37 MachOPointer32, 38 MachOPointer64, 39 MachOPointer64Anon, 40 MachOPage21, 41 MachOPageOffset12, 42 MachOGOTPage21, 43 MachOGOTPageOffset12, 44 MachOTLVPage21, 45 MachOTLVPageOffset12, 46 MachOPointerToGOT, 47 MachOPairedAddend, 48 MachOLDRLiteral19, 49 MachODelta32, 50 MachODelta64, 51 MachONegDelta32, 52 MachONegDelta64, 53 }; 54 55 static Expected<MachOARM64RelocationKind> 56 getRelocationKind(const MachO::relocation_info &RI) { 57 switch (RI.r_type) { 58 case MachO::ARM64_RELOC_UNSIGNED: 59 if (!RI.r_pcrel) { 60 if (RI.r_length == 3) 61 return RI.r_extern ? MachOPointer64 : MachOPointer64Anon; 62 else if (RI.r_length == 2) 63 return MachOPointer32; 64 } 65 break; 66 case MachO::ARM64_RELOC_SUBTRACTOR: 67 // SUBTRACTOR must be non-pc-rel, extern, with length 2 or 3. 68 // Initially represent SUBTRACTOR relocations with 'Delta<W>'. 69 // They may be turned into NegDelta<W> by parsePairRelocation. 70 if (!RI.r_pcrel && RI.r_extern) { 71 if (RI.r_length == 2) 72 return MachODelta32; 73 else if (RI.r_length == 3) 74 return MachODelta64; 75 } 76 break; 77 case MachO::ARM64_RELOC_BRANCH26: 78 if (RI.r_pcrel && RI.r_extern && RI.r_length == 2) 79 return MachOBranch26; 80 break; 81 case MachO::ARM64_RELOC_PAGE21: 82 if (RI.r_pcrel && RI.r_extern && RI.r_length == 2) 83 return MachOPage21; 84 break; 85 case MachO::ARM64_RELOC_PAGEOFF12: 86 if (!RI.r_pcrel && RI.r_extern && RI.r_length == 2) 87 return MachOPageOffset12; 88 break; 89 case MachO::ARM64_RELOC_GOT_LOAD_PAGE21: 90 if (RI.r_pcrel && RI.r_extern && RI.r_length == 2) 91 return MachOGOTPage21; 92 break; 93 case MachO::ARM64_RELOC_GOT_LOAD_PAGEOFF12: 94 if (!RI.r_pcrel && RI.r_extern && RI.r_length == 2) 95 return MachOGOTPageOffset12; 96 break; 97 case MachO::ARM64_RELOC_POINTER_TO_GOT: 98 if (RI.r_pcrel && RI.r_extern && RI.r_length == 2) 99 return MachOPointerToGOT; 100 break; 101 case MachO::ARM64_RELOC_ADDEND: 102 if (!RI.r_pcrel && !RI.r_extern && RI.r_length == 2) 103 return MachOPairedAddend; 104 break; 105 case MachO::ARM64_RELOC_TLVP_LOAD_PAGE21: 106 if (RI.r_pcrel && RI.r_extern && RI.r_length == 2) 107 return MachOTLVPage21; 108 break; 109 case MachO::ARM64_RELOC_TLVP_LOAD_PAGEOFF12: 110 if (!RI.r_pcrel && RI.r_extern && RI.r_length == 2) 111 return MachOTLVPageOffset12; 112 break; 113 } 114 115 return make_error<JITLinkError>( 116 "Unsupported arm64 relocation: address=" + 117 formatv("{0:x8}", RI.r_address) + 118 ", symbolnum=" + formatv("{0:x6}", RI.r_symbolnum) + 119 ", kind=" + formatv("{0:x1}", RI.r_type) + 120 ", pc_rel=" + (RI.r_pcrel ? "true" : "false") + 121 ", extern=" + (RI.r_extern ? "true" : "false") + 122 ", length=" + formatv("{0:d}", RI.r_length)); 123 } 124 125 using PairRelocInfo = std::tuple<Edge::Kind, Symbol *, uint64_t>; 126 127 // Parses paired SUBTRACTOR/UNSIGNED relocations and, on success, 128 // returns the edge kind and addend to be used. 129 Expected<PairRelocInfo> 130 parsePairRelocation(Block &BlockToFix, Edge::Kind SubtractorKind, 131 const MachO::relocation_info &SubRI, 132 orc::ExecutorAddr FixupAddress, const char *FixupContent, 133 object::relocation_iterator &UnsignedRelItr, 134 object::relocation_iterator &RelEnd) { 135 using namespace support; 136 137 assert(((SubtractorKind == MachODelta32 && SubRI.r_length == 2) || 138 (SubtractorKind == MachODelta64 && SubRI.r_length == 3)) && 139 "Subtractor kind should match length"); 140 assert(SubRI.r_extern && "SUBTRACTOR reloc symbol should be extern"); 141 assert(!SubRI.r_pcrel && "SUBTRACTOR reloc should not be PCRel"); 142 143 if (UnsignedRelItr == RelEnd) 144 return make_error<JITLinkError>("arm64 SUBTRACTOR without paired " 145 "UNSIGNED relocation"); 146 147 auto UnsignedRI = getRelocationInfo(UnsignedRelItr); 148 149 if (SubRI.r_address != UnsignedRI.r_address) 150 return make_error<JITLinkError>("arm64 SUBTRACTOR and paired UNSIGNED " 151 "point to different addresses"); 152 153 if (SubRI.r_length != UnsignedRI.r_length) 154 return make_error<JITLinkError>("length of arm64 SUBTRACTOR and paired " 155 "UNSIGNED reloc must match"); 156 157 Symbol *FromSymbol; 158 if (auto FromSymbolOrErr = findSymbolByIndex(SubRI.r_symbolnum)) 159 FromSymbol = FromSymbolOrErr->GraphSymbol; 160 else 161 return FromSymbolOrErr.takeError(); 162 163 // Read the current fixup value. 164 uint64_t FixupValue = 0; 165 if (SubRI.r_length == 3) 166 FixupValue = *(const little64_t *)FixupContent; 167 else 168 FixupValue = *(const little32_t *)FixupContent; 169 170 // Find 'ToSymbol' using symbol number or address, depending on whether the 171 // paired UNSIGNED relocation is extern. 172 Symbol *ToSymbol = nullptr; 173 if (UnsignedRI.r_extern) { 174 // Find target symbol by symbol index. 175 if (auto ToSymbolOrErr = findSymbolByIndex(UnsignedRI.r_symbolnum)) 176 ToSymbol = ToSymbolOrErr->GraphSymbol; 177 else 178 return ToSymbolOrErr.takeError(); 179 } else { 180 auto ToSymbolSec = findSectionByIndex(UnsignedRI.r_symbolnum - 1); 181 if (!ToSymbolSec) 182 return ToSymbolSec.takeError(); 183 ToSymbol = getSymbolByAddress(*ToSymbolSec, ToSymbolSec->Address); 184 assert(ToSymbol && "No symbol for section"); 185 FixupValue -= ToSymbol->getAddress().getValue(); 186 } 187 188 Edge::Kind DeltaKind; 189 Symbol *TargetSymbol; 190 uint64_t Addend; 191 if (&BlockToFix == &FromSymbol->getAddressable()) { 192 TargetSymbol = ToSymbol; 193 DeltaKind = (SubRI.r_length == 3) ? aarch64::Delta64 : aarch64::Delta32; 194 Addend = FixupValue + (FixupAddress - FromSymbol->getAddress()); 195 // FIXME: handle extern 'from'. 196 } else if (&BlockToFix == &ToSymbol->getAddressable()) { 197 TargetSymbol = &*FromSymbol; 198 DeltaKind = 199 (SubRI.r_length == 3) ? aarch64::NegDelta64 : aarch64::NegDelta32; 200 Addend = FixupValue - (FixupAddress - ToSymbol->getAddress()); 201 } else { 202 // BlockToFix was neither FromSymbol nor ToSymbol. 203 return make_error<JITLinkError>("SUBTRACTOR relocation must fix up " 204 "either 'A' or 'B' (or a symbol in one " 205 "of their alt-entry groups)"); 206 } 207 208 return PairRelocInfo(DeltaKind, TargetSymbol, Addend); 209 } 210 211 Error addRelocations() override { 212 using namespace support; 213 auto &Obj = getObject(); 214 215 LLVM_DEBUG(dbgs() << "Processing relocations:\n"); 216 217 for (auto &S : Obj.sections()) { 218 219 orc::ExecutorAddr SectionAddress(S.getAddress()); 220 221 // Skip relocations virtual sections. 222 if (S.isVirtual()) { 223 if (S.relocation_begin() != S.relocation_end()) 224 return make_error<JITLinkError>("Virtual section contains " 225 "relocations"); 226 continue; 227 } 228 229 auto NSec = 230 findSectionByIndex(Obj.getSectionIndex(S.getRawDataRefImpl())); 231 if (!NSec) 232 return NSec.takeError(); 233 234 // Skip relocations for MachO sections without corresponding graph 235 // sections. 236 { 237 if (!NSec->GraphSection) { 238 LLVM_DEBUG({ 239 dbgs() << " Skipping relocations for MachO section " 240 << NSec->SegName << "/" << NSec->SectName 241 << " which has no associated graph section\n"; 242 }); 243 continue; 244 } 245 } 246 247 for (auto RelItr = S.relocation_begin(), RelEnd = S.relocation_end(); 248 RelItr != RelEnd; ++RelItr) { 249 250 MachO::relocation_info RI = getRelocationInfo(RelItr); 251 252 // Validate the relocation kind. 253 auto MachORelocKind = getRelocationKind(RI); 254 if (!MachORelocKind) 255 return MachORelocKind.takeError(); 256 257 // Find the address of the value to fix up. 258 orc::ExecutorAddr FixupAddress = 259 SectionAddress + (uint32_t)RI.r_address; 260 LLVM_DEBUG({ 261 dbgs() << " " << NSec->SectName << " + " 262 << formatv("{0:x8}", RI.r_address) << ":\n"; 263 }); 264 265 // Find the block that the fixup points to. 266 Block *BlockToFix = nullptr; 267 { 268 auto SymbolToFixOrErr = findSymbolByAddress(*NSec, FixupAddress); 269 if (!SymbolToFixOrErr) 270 return SymbolToFixOrErr.takeError(); 271 BlockToFix = &SymbolToFixOrErr->getBlock(); 272 } 273 274 if (FixupAddress + orc::ExecutorAddrDiff(1ULL << RI.r_length) > 275 BlockToFix->getAddress() + BlockToFix->getContent().size()) 276 return make_error<JITLinkError>( 277 "Relocation content extends past end of fixup block"); 278 279 Edge::Kind Kind = Edge::Invalid; 280 281 // Get a pointer to the fixup content. 282 const char *FixupContent = BlockToFix->getContent().data() + 283 (FixupAddress - BlockToFix->getAddress()); 284 285 // The target symbol and addend will be populated by the switch below. 286 Symbol *TargetSymbol = nullptr; 287 uint64_t Addend = 0; 288 289 if (*MachORelocKind == MachOPairedAddend) { 290 // If this is an Addend relocation then process it and move to the 291 // paired reloc. 292 293 Addend = SignExtend64(RI.r_symbolnum, 24); 294 295 if (RelItr == RelEnd) 296 return make_error<JITLinkError>("Unpaired Addend reloc at " + 297 formatv("{0:x16}", FixupAddress)); 298 ++RelItr; 299 RI = getRelocationInfo(RelItr); 300 301 MachORelocKind = getRelocationKind(RI); 302 if (!MachORelocKind) 303 return MachORelocKind.takeError(); 304 305 if (*MachORelocKind != MachOBranch26 && 306 *MachORelocKind != MachOPage21 && 307 *MachORelocKind != MachOPageOffset12) 308 return make_error<JITLinkError>( 309 "Invalid relocation pair: Addend + " + 310 StringRef(getMachOARM64RelocationKindName(*MachORelocKind))); 311 312 LLVM_DEBUG({ 313 dbgs() << " Addend: value = " << formatv("{0:x6}", Addend) 314 << ", pair is " 315 << getMachOARM64RelocationKindName(*MachORelocKind) << "\n"; 316 }); 317 318 // Find the address of the value to fix up. 319 orc::ExecutorAddr PairedFixupAddress = 320 SectionAddress + (uint32_t)RI.r_address; 321 if (PairedFixupAddress != FixupAddress) 322 return make_error<JITLinkError>("Paired relocation points at " 323 "different target"); 324 } 325 326 switch (*MachORelocKind) { 327 case MachOBranch26: { 328 if (auto TargetSymbolOrErr = findSymbolByIndex(RI.r_symbolnum)) 329 TargetSymbol = TargetSymbolOrErr->GraphSymbol; 330 else 331 return TargetSymbolOrErr.takeError(); 332 uint32_t Instr = *(const ulittle32_t *)FixupContent; 333 if ((Instr & 0x7fffffff) != 0x14000000) 334 return make_error<JITLinkError>("BRANCH26 target is not a B or BL " 335 "instruction with a zero addend"); 336 Kind = aarch64::Branch26PCRel; 337 break; 338 } 339 case MachOPointer32: 340 if (auto TargetSymbolOrErr = findSymbolByIndex(RI.r_symbolnum)) 341 TargetSymbol = TargetSymbolOrErr->GraphSymbol; 342 else 343 return TargetSymbolOrErr.takeError(); 344 Addend = *(const ulittle32_t *)FixupContent; 345 Kind = aarch64::Pointer32; 346 break; 347 case MachOPointer64: 348 if (auto TargetSymbolOrErr = findSymbolByIndex(RI.r_symbolnum)) 349 TargetSymbol = TargetSymbolOrErr->GraphSymbol; 350 else 351 return TargetSymbolOrErr.takeError(); 352 Addend = *(const ulittle64_t *)FixupContent; 353 Kind = aarch64::Pointer64; 354 break; 355 case MachOPointer64Anon: { 356 orc::ExecutorAddr TargetAddress(*(const ulittle64_t *)FixupContent); 357 auto TargetNSec = findSectionByIndex(RI.r_symbolnum - 1); 358 if (!TargetNSec) 359 return TargetNSec.takeError(); 360 if (auto TargetSymbolOrErr = 361 findSymbolByAddress(*TargetNSec, TargetAddress)) 362 TargetSymbol = &*TargetSymbolOrErr; 363 else 364 return TargetSymbolOrErr.takeError(); 365 Addend = TargetAddress - TargetSymbol->getAddress(); 366 Kind = aarch64::Pointer64; 367 break; 368 } 369 case MachOPage21: 370 case MachOGOTPage21: 371 case MachOTLVPage21: { 372 if (auto TargetSymbolOrErr = findSymbolByIndex(RI.r_symbolnum)) 373 TargetSymbol = TargetSymbolOrErr->GraphSymbol; 374 else 375 return TargetSymbolOrErr.takeError(); 376 uint32_t Instr = *(const ulittle32_t *)FixupContent; 377 if ((Instr & 0xffffffe0) != 0x90000000) 378 return make_error<JITLinkError>("PAGE21/GOTPAGE21 target is not an " 379 "ADRP instruction with a zero " 380 "addend"); 381 382 if (*MachORelocKind == MachOPage21) { 383 Kind = aarch64::Page21; 384 } else if (*MachORelocKind == MachOGOTPage21) { 385 Kind = aarch64::RequestGOTAndTransformToPage21; 386 } else if (*MachORelocKind == MachOTLVPage21) { 387 Kind = aarch64::RequestTLVPAndTransformToPage21; 388 } 389 break; 390 } 391 case MachOPageOffset12: { 392 if (auto TargetSymbolOrErr = findSymbolByIndex(RI.r_symbolnum)) 393 TargetSymbol = TargetSymbolOrErr->GraphSymbol; 394 else 395 return TargetSymbolOrErr.takeError(); 396 uint32_t Instr = *(const ulittle32_t *)FixupContent; 397 uint32_t EncodedAddend = (Instr & 0x003FFC00) >> 10; 398 if (EncodedAddend != 0) 399 return make_error<JITLinkError>("GOTPAGEOFF12 target has non-zero " 400 "encoded addend"); 401 Kind = aarch64::PageOffset12; 402 break; 403 } 404 case MachOGOTPageOffset12: 405 case MachOTLVPageOffset12: { 406 if (auto TargetSymbolOrErr = findSymbolByIndex(RI.r_symbolnum)) 407 TargetSymbol = TargetSymbolOrErr->GraphSymbol; 408 else 409 return TargetSymbolOrErr.takeError(); 410 uint32_t Instr = *(const ulittle32_t *)FixupContent; 411 if ((Instr & 0xfffffc00) != 0xf9400000) 412 return make_error<JITLinkError>("GOTPAGEOFF12 target is not an LDR " 413 "immediate instruction with a zero " 414 "addend"); 415 416 if (*MachORelocKind == MachOGOTPageOffset12) { 417 Kind = aarch64::RequestGOTAndTransformToPageOffset12; 418 } else if (*MachORelocKind == MachOTLVPageOffset12) { 419 Kind = aarch64::RequestTLVPAndTransformToPageOffset12; 420 } 421 break; 422 } 423 case MachOPointerToGOT: 424 if (auto TargetSymbolOrErr = findSymbolByIndex(RI.r_symbolnum)) 425 TargetSymbol = TargetSymbolOrErr->GraphSymbol; 426 else 427 return TargetSymbolOrErr.takeError(); 428 429 Kind = aarch64::RequestGOTAndTransformToDelta32; 430 break; 431 case MachODelta32: 432 case MachODelta64: { 433 // We use Delta32/Delta64 to represent SUBTRACTOR relocations. 434 // parsePairRelocation handles the paired reloc, and returns the 435 // edge kind to be used (either Delta32/Delta64, or 436 // NegDelta32/NegDelta64, depending on the direction of the 437 // subtraction) along with the addend. 438 auto PairInfo = 439 parsePairRelocation(*BlockToFix, *MachORelocKind, RI, 440 FixupAddress, FixupContent, ++RelItr, RelEnd); 441 if (!PairInfo) 442 return PairInfo.takeError(); 443 std::tie(Kind, TargetSymbol, Addend) = *PairInfo; 444 assert(TargetSymbol && "No target symbol from parsePairRelocation?"); 445 break; 446 } 447 default: 448 llvm_unreachable("Special relocation kind should not appear in " 449 "mach-o file"); 450 } 451 452 LLVM_DEBUG({ 453 dbgs() << " "; 454 Edge GE(Kind, FixupAddress - BlockToFix->getAddress(), *TargetSymbol, 455 Addend); 456 printEdge(dbgs(), *BlockToFix, GE, aarch64::getEdgeKindName(Kind)); 457 dbgs() << "\n"; 458 }); 459 BlockToFix->addEdge(Kind, FixupAddress - BlockToFix->getAddress(), 460 *TargetSymbol, Addend); 461 } 462 } 463 return Error::success(); 464 } 465 466 /// Return the string name of the given MachO arm64 edge kind. 467 const char *getMachOARM64RelocationKindName(Edge::Kind R) { 468 switch (R) { 469 case MachOBranch26: 470 return "MachOBranch26"; 471 case MachOPointer64: 472 return "MachOPointer64"; 473 case MachOPointer64Anon: 474 return "MachOPointer64Anon"; 475 case MachOPage21: 476 return "MachOPage21"; 477 case MachOPageOffset12: 478 return "MachOPageOffset12"; 479 case MachOGOTPage21: 480 return "MachOGOTPage21"; 481 case MachOGOTPageOffset12: 482 return "MachOGOTPageOffset12"; 483 case MachOTLVPage21: 484 return "MachOTLVPage21"; 485 case MachOTLVPageOffset12: 486 return "MachOTLVPageOffset12"; 487 case MachOPointerToGOT: 488 return "MachOPointerToGOT"; 489 case MachOPairedAddend: 490 return "MachOPairedAddend"; 491 case MachOLDRLiteral19: 492 return "MachOLDRLiteral19"; 493 case MachODelta32: 494 return "MachODelta32"; 495 case MachODelta64: 496 return "MachODelta64"; 497 case MachONegDelta32: 498 return "MachONegDelta32"; 499 case MachONegDelta64: 500 return "MachONegDelta64"; 501 default: 502 return getGenericEdgeKindName(static_cast<Edge::Kind>(R)); 503 } 504 } 505 506 unsigned NumSymbols = 0; 507 }; 508 509 } // namespace 510 511 namespace llvm { 512 namespace jitlink { 513 514 Error buildTables_MachO_arm64(LinkGraph &G) { 515 LLVM_DEBUG(dbgs() << "Visiting edges in graph:\n"); 516 517 aarch64::GOTTableManager GOT; 518 aarch64::PLTTableManager PLT(GOT); 519 visitExistingEdges(G, GOT, PLT); 520 return Error::success(); 521 } 522 523 class MachOJITLinker_arm64 : public JITLinker<MachOJITLinker_arm64> { 524 friend class JITLinker<MachOJITLinker_arm64>; 525 526 public: 527 MachOJITLinker_arm64(std::unique_ptr<JITLinkContext> Ctx, 528 std::unique_ptr<LinkGraph> G, 529 PassConfiguration PassConfig) 530 : JITLinker(std::move(Ctx), std::move(G), std::move(PassConfig)) {} 531 532 private: 533 Error applyFixup(LinkGraph &G, Block &B, const Edge &E) const { 534 return aarch64::applyFixup(G, B, E); 535 } 536 537 uint64_t NullValue = 0; 538 }; 539 540 Expected<std::unique_ptr<LinkGraph>> 541 createLinkGraphFromMachOObject_arm64(MemoryBufferRef ObjectBuffer) { 542 auto MachOObj = object::ObjectFile::createMachOObjectFile(ObjectBuffer); 543 if (!MachOObj) 544 return MachOObj.takeError(); 545 546 auto Features = (*MachOObj)->getFeatures(); 547 if (!Features) 548 return Features.takeError(); 549 550 return MachOLinkGraphBuilder_arm64(**MachOObj, std::move(*Features)) 551 .buildGraph(); 552 } 553 554 void link_MachO_arm64(std::unique_ptr<LinkGraph> G, 555 std::unique_ptr<JITLinkContext> Ctx) { 556 557 PassConfiguration Config; 558 559 if (Ctx->shouldAddDefaultTargetPasses(G->getTargetTriple())) { 560 // Add a mark-live pass. 561 if (auto MarkLive = Ctx->getMarkLivePass(G->getTargetTriple())) 562 Config.PrePrunePasses.push_back(std::move(MarkLive)); 563 else 564 Config.PrePrunePasses.push_back(markAllSymbolsLive); 565 566 // Add compact unwind splitter pass. 567 Config.PrePrunePasses.push_back( 568 CompactUnwindSplitter("__LD,__compact_unwind")); 569 570 // Add eh-frame passses. 571 // FIXME: Prune eh-frames for which compact-unwind is available once 572 // we support compact-unwind registration with libunwind. 573 Config.PrePrunePasses.push_back(createEHFrameSplitterPass_MachO_arm64()); 574 Config.PrePrunePasses.push_back(createEHFrameEdgeFixerPass_MachO_arm64()); 575 576 // Add an in-place GOT/Stubs pass. 577 Config.PostPrunePasses.push_back(buildTables_MachO_arm64); 578 } 579 580 if (auto Err = Ctx->modifyPassConfig(*G, Config)) 581 return Ctx->notifyFailed(std::move(Err)); 582 583 // Construct a JITLinker and run the link function. 584 MachOJITLinker_arm64::link(std::move(Ctx), std::move(G), std::move(Config)); 585 } 586 587 LinkGraphPassFunction createEHFrameSplitterPass_MachO_arm64() { 588 return DWARFRecordSectionSplitter("__TEXT,__eh_frame"); 589 } 590 591 LinkGraphPassFunction createEHFrameEdgeFixerPass_MachO_arm64() { 592 return EHFrameEdgeFixer("__TEXT,__eh_frame", aarch64::PointerSize, 593 aarch64::Pointer32, aarch64::Pointer64, 594 aarch64::Delta32, aarch64::Delta64, 595 aarch64::NegDelta32); 596 } 597 598 } // end namespace jitlink 599 } // end namespace llvm 600