1 //===- ELFObjectFile.cpp - ELF object file implementation -----------------===// 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 // Part of the ELFObjectFile class implementation. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "llvm/Object/ELFObjectFile.h" 14 #include "llvm/ADT/Triple.h" 15 #include "llvm/BinaryFormat/ELF.h" 16 #include "llvm/MC/MCInstrAnalysis.h" 17 #include "llvm/MC/SubtargetFeature.h" 18 #include "llvm/Object/ELF.h" 19 #include "llvm/Object/ELFTypes.h" 20 #include "llvm/Object/Error.h" 21 #include "llvm/Support/ARMAttributeParser.h" 22 #include "llvm/Support/ARMBuildAttributes.h" 23 #include "llvm/Support/Endian.h" 24 #include "llvm/Support/ErrorHandling.h" 25 #include "llvm/Support/MathExtras.h" 26 #include "llvm/Support/RISCVAttributeParser.h" 27 #include "llvm/Support/RISCVAttributes.h" 28 #include "llvm/Support/TargetRegistry.h" 29 #include <algorithm> 30 #include <cstddef> 31 #include <cstdint> 32 #include <memory> 33 #include <string> 34 #include <system_error> 35 #include <utility> 36 37 using namespace llvm; 38 using namespace object; 39 40 const EnumEntry<unsigned> llvm::object::ElfSymbolTypes[NumElfSymbolTypes] = { 41 {"None", "NOTYPE", ELF::STT_NOTYPE}, 42 {"Object", "OBJECT", ELF::STT_OBJECT}, 43 {"Function", "FUNC", ELF::STT_FUNC}, 44 {"Section", "SECTION", ELF::STT_SECTION}, 45 {"File", "FILE", ELF::STT_FILE}, 46 {"Common", "COMMON", ELF::STT_COMMON}, 47 {"TLS", "TLS", ELF::STT_TLS}, 48 {"Unknown", "<unknown>: 7", 7}, 49 {"Unknown", "<unknown>: 8", 8}, 50 {"Unknown", "<unknown>: 9", 9}, 51 {"GNU_IFunc", "IFUNC", ELF::STT_GNU_IFUNC}, 52 {"OS Specific", "<OS specific>: 11", 11}, 53 {"OS Specific", "<OS specific>: 12", 12}, 54 {"Proc Specific", "<processor specific>: 13", 13}, 55 {"Proc Specific", "<processor specific>: 14", 14}, 56 {"Proc Specific", "<processor specific>: 15", 15} 57 }; 58 59 ELFObjectFileBase::ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source) 60 : ObjectFile(Type, Source) {} 61 62 template <class ELFT> 63 static Expected<std::unique_ptr<ELFObjectFile<ELFT>>> 64 createPtr(MemoryBufferRef Object) { 65 auto Ret = ELFObjectFile<ELFT>::create(Object); 66 if (Error E = Ret.takeError()) 67 return std::move(E); 68 return std::make_unique<ELFObjectFile<ELFT>>(std::move(*Ret)); 69 } 70 71 Expected<std::unique_ptr<ObjectFile>> 72 ObjectFile::createELFObjectFile(MemoryBufferRef Obj) { 73 std::pair<unsigned char, unsigned char> Ident = 74 getElfArchType(Obj.getBuffer()); 75 std::size_t MaxAlignment = 76 1ULL << countTrailingZeros(uintptr_t(Obj.getBufferStart())); 77 78 if (MaxAlignment < 2) 79 return createError("Insufficient alignment"); 80 81 if (Ident.first == ELF::ELFCLASS32) { 82 if (Ident.second == ELF::ELFDATA2LSB) 83 return createPtr<ELF32LE>(Obj); 84 else if (Ident.second == ELF::ELFDATA2MSB) 85 return createPtr<ELF32BE>(Obj); 86 else 87 return createError("Invalid ELF data"); 88 } else if (Ident.first == ELF::ELFCLASS64) { 89 if (Ident.second == ELF::ELFDATA2LSB) 90 return createPtr<ELF64LE>(Obj); 91 else if (Ident.second == ELF::ELFDATA2MSB) 92 return createPtr<ELF64BE>(Obj); 93 else 94 return createError("Invalid ELF data"); 95 } 96 return createError("Invalid ELF class"); 97 } 98 99 SubtargetFeatures ELFObjectFileBase::getMIPSFeatures() const { 100 SubtargetFeatures Features; 101 unsigned PlatformFlags = getPlatformFlags(); 102 103 switch (PlatformFlags & ELF::EF_MIPS_ARCH) { 104 case ELF::EF_MIPS_ARCH_1: 105 break; 106 case ELF::EF_MIPS_ARCH_2: 107 Features.AddFeature("mips2"); 108 break; 109 case ELF::EF_MIPS_ARCH_3: 110 Features.AddFeature("mips3"); 111 break; 112 case ELF::EF_MIPS_ARCH_4: 113 Features.AddFeature("mips4"); 114 break; 115 case ELF::EF_MIPS_ARCH_5: 116 Features.AddFeature("mips5"); 117 break; 118 case ELF::EF_MIPS_ARCH_32: 119 Features.AddFeature("mips32"); 120 break; 121 case ELF::EF_MIPS_ARCH_64: 122 Features.AddFeature("mips64"); 123 break; 124 case ELF::EF_MIPS_ARCH_32R2: 125 Features.AddFeature("mips32r2"); 126 break; 127 case ELF::EF_MIPS_ARCH_64R2: 128 Features.AddFeature("mips64r2"); 129 break; 130 case ELF::EF_MIPS_ARCH_32R6: 131 Features.AddFeature("mips32r6"); 132 break; 133 case ELF::EF_MIPS_ARCH_64R6: 134 Features.AddFeature("mips64r6"); 135 break; 136 default: 137 llvm_unreachable("Unknown EF_MIPS_ARCH value"); 138 } 139 140 switch (PlatformFlags & ELF::EF_MIPS_MACH) { 141 case ELF::EF_MIPS_MACH_NONE: 142 // No feature associated with this value. 143 break; 144 case ELF::EF_MIPS_MACH_OCTEON: 145 Features.AddFeature("cnmips"); 146 break; 147 default: 148 llvm_unreachable("Unknown EF_MIPS_ARCH value"); 149 } 150 151 if (PlatformFlags & ELF::EF_MIPS_ARCH_ASE_M16) 152 Features.AddFeature("mips16"); 153 if (PlatformFlags & ELF::EF_MIPS_MICROMIPS) 154 Features.AddFeature("micromips"); 155 156 return Features; 157 } 158 159 SubtargetFeatures ELFObjectFileBase::getARMFeatures() const { 160 SubtargetFeatures Features; 161 ARMAttributeParser Attributes; 162 if (Error E = getBuildAttributes(Attributes)) { 163 consumeError(std::move(E)); 164 return SubtargetFeatures(); 165 } 166 167 // both ARMv7-M and R have to support thumb hardware div 168 bool isV7 = false; 169 Optional<unsigned> Attr = 170 Attributes.getAttributeValue(ARMBuildAttrs::CPU_arch); 171 if (Attr.hasValue()) 172 isV7 = Attr.getValue() == ARMBuildAttrs::v7; 173 174 Attr = Attributes.getAttributeValue(ARMBuildAttrs::CPU_arch_profile); 175 if (Attr.hasValue()) { 176 switch (Attr.getValue()) { 177 case ARMBuildAttrs::ApplicationProfile: 178 Features.AddFeature("aclass"); 179 break; 180 case ARMBuildAttrs::RealTimeProfile: 181 Features.AddFeature("rclass"); 182 if (isV7) 183 Features.AddFeature("hwdiv"); 184 break; 185 case ARMBuildAttrs::MicroControllerProfile: 186 Features.AddFeature("mclass"); 187 if (isV7) 188 Features.AddFeature("hwdiv"); 189 break; 190 } 191 } 192 193 Attr = Attributes.getAttributeValue(ARMBuildAttrs::THUMB_ISA_use); 194 if (Attr.hasValue()) { 195 switch (Attr.getValue()) { 196 default: 197 break; 198 case ARMBuildAttrs::Not_Allowed: 199 Features.AddFeature("thumb", false); 200 Features.AddFeature("thumb2", false); 201 break; 202 case ARMBuildAttrs::AllowThumb32: 203 Features.AddFeature("thumb2"); 204 break; 205 } 206 } 207 208 Attr = Attributes.getAttributeValue(ARMBuildAttrs::FP_arch); 209 if (Attr.hasValue()) { 210 switch (Attr.getValue()) { 211 default: 212 break; 213 case ARMBuildAttrs::Not_Allowed: 214 Features.AddFeature("vfp2sp", false); 215 Features.AddFeature("vfp3d16sp", false); 216 Features.AddFeature("vfp4d16sp", false); 217 break; 218 case ARMBuildAttrs::AllowFPv2: 219 Features.AddFeature("vfp2"); 220 break; 221 case ARMBuildAttrs::AllowFPv3A: 222 case ARMBuildAttrs::AllowFPv3B: 223 Features.AddFeature("vfp3"); 224 break; 225 case ARMBuildAttrs::AllowFPv4A: 226 case ARMBuildAttrs::AllowFPv4B: 227 Features.AddFeature("vfp4"); 228 break; 229 } 230 } 231 232 Attr = Attributes.getAttributeValue(ARMBuildAttrs::Advanced_SIMD_arch); 233 if (Attr.hasValue()) { 234 switch (Attr.getValue()) { 235 default: 236 break; 237 case ARMBuildAttrs::Not_Allowed: 238 Features.AddFeature("neon", false); 239 Features.AddFeature("fp16", false); 240 break; 241 case ARMBuildAttrs::AllowNeon: 242 Features.AddFeature("neon"); 243 break; 244 case ARMBuildAttrs::AllowNeon2: 245 Features.AddFeature("neon"); 246 Features.AddFeature("fp16"); 247 break; 248 } 249 } 250 251 Attr = Attributes.getAttributeValue(ARMBuildAttrs::MVE_arch); 252 if (Attr.hasValue()) { 253 switch (Attr.getValue()) { 254 default: 255 break; 256 case ARMBuildAttrs::Not_Allowed: 257 Features.AddFeature("mve", false); 258 Features.AddFeature("mve.fp", false); 259 break; 260 case ARMBuildAttrs::AllowMVEInteger: 261 Features.AddFeature("mve.fp", false); 262 Features.AddFeature("mve"); 263 break; 264 case ARMBuildAttrs::AllowMVEIntegerAndFloat: 265 Features.AddFeature("mve.fp"); 266 break; 267 } 268 } 269 270 Attr = Attributes.getAttributeValue(ARMBuildAttrs::DIV_use); 271 if (Attr.hasValue()) { 272 switch (Attr.getValue()) { 273 default: 274 break; 275 case ARMBuildAttrs::DisallowDIV: 276 Features.AddFeature("hwdiv", false); 277 Features.AddFeature("hwdiv-arm", false); 278 break; 279 case ARMBuildAttrs::AllowDIVExt: 280 Features.AddFeature("hwdiv"); 281 Features.AddFeature("hwdiv-arm"); 282 break; 283 } 284 } 285 286 return Features; 287 } 288 289 SubtargetFeatures ELFObjectFileBase::getRISCVFeatures() const { 290 SubtargetFeatures Features; 291 unsigned PlatformFlags = getPlatformFlags(); 292 293 if (PlatformFlags & ELF::EF_RISCV_RVC) { 294 Features.AddFeature("c"); 295 } 296 297 // Add features according to the ELF attribute section. 298 // If there are any unrecognized features, ignore them. 299 RISCVAttributeParser Attributes; 300 if (Error E = getBuildAttributes(Attributes)) { 301 // TODO Propagate Error. 302 consumeError(std::move(E)); 303 return Features; // Keep "c" feature if there is one in PlatformFlags. 304 } 305 306 Optional<StringRef> Attr = Attributes.getAttributeString(RISCVAttrs::ARCH); 307 if (Attr.hasValue()) { 308 // The Arch pattern is [rv32|rv64][i|e]version(_[m|a|f|d|c]version)* 309 // Version string pattern is (major)p(minor). Major and minor are optional. 310 // For example, a version number could be 2p0, 2, or p92. 311 StringRef Arch = Attr.getValue(); 312 if (Arch.consume_front("rv32")) 313 Features.AddFeature("64bit", false); 314 else if (Arch.consume_front("rv64")) 315 Features.AddFeature("64bit"); 316 317 while (!Arch.empty()) { 318 switch (Arch[0]) { 319 default: 320 break; // Ignore unexpected features. 321 case 'i': 322 Features.AddFeature("e", false); 323 break; 324 case 'd': 325 Features.AddFeature("f"); // D-ext will imply F-ext. 326 LLVM_FALLTHROUGH; 327 case 'e': 328 case 'm': 329 case 'a': 330 case 'f': 331 case 'c': 332 Features.AddFeature(Arch.take_front()); 333 break; 334 } 335 336 // FIXME: Handle version numbers. 337 Arch = Arch.drop_until([](char c) { return c == '_' || c == '\0'; }); 338 Arch = Arch.drop_while([](char c) { return c == '_'; }); 339 } 340 } 341 342 return Features; 343 } 344 345 SubtargetFeatures ELFObjectFileBase::getFeatures() const { 346 switch (getEMachine()) { 347 case ELF::EM_MIPS: 348 return getMIPSFeatures(); 349 case ELF::EM_ARM: 350 return getARMFeatures(); 351 case ELF::EM_RISCV: 352 return getRISCVFeatures(); 353 default: 354 return SubtargetFeatures(); 355 } 356 } 357 358 Optional<StringRef> ELFObjectFileBase::tryGetCPUName() const { 359 switch (getEMachine()) { 360 case ELF::EM_AMDGPU: 361 return getAMDGPUCPUName(); 362 default: 363 return None; 364 } 365 } 366 367 StringRef ELFObjectFileBase::getAMDGPUCPUName() const { 368 assert(getEMachine() == ELF::EM_AMDGPU); 369 unsigned CPU = getPlatformFlags() & ELF::EF_AMDGPU_MACH; 370 371 switch (CPU) { 372 // Radeon HD 2000/3000 Series (R600). 373 case ELF::EF_AMDGPU_MACH_R600_R600: 374 return "r600"; 375 case ELF::EF_AMDGPU_MACH_R600_R630: 376 return "r630"; 377 case ELF::EF_AMDGPU_MACH_R600_RS880: 378 return "rs880"; 379 case ELF::EF_AMDGPU_MACH_R600_RV670: 380 return "rv670"; 381 382 // Radeon HD 4000 Series (R700). 383 case ELF::EF_AMDGPU_MACH_R600_RV710: 384 return "rv710"; 385 case ELF::EF_AMDGPU_MACH_R600_RV730: 386 return "rv730"; 387 case ELF::EF_AMDGPU_MACH_R600_RV770: 388 return "rv770"; 389 390 // Radeon HD 5000 Series (Evergreen). 391 case ELF::EF_AMDGPU_MACH_R600_CEDAR: 392 return "cedar"; 393 case ELF::EF_AMDGPU_MACH_R600_CYPRESS: 394 return "cypress"; 395 case ELF::EF_AMDGPU_MACH_R600_JUNIPER: 396 return "juniper"; 397 case ELF::EF_AMDGPU_MACH_R600_REDWOOD: 398 return "redwood"; 399 case ELF::EF_AMDGPU_MACH_R600_SUMO: 400 return "sumo"; 401 402 // Radeon HD 6000 Series (Northern Islands). 403 case ELF::EF_AMDGPU_MACH_R600_BARTS: 404 return "barts"; 405 case ELF::EF_AMDGPU_MACH_R600_CAICOS: 406 return "caicos"; 407 case ELF::EF_AMDGPU_MACH_R600_CAYMAN: 408 return "cayman"; 409 case ELF::EF_AMDGPU_MACH_R600_TURKS: 410 return "turks"; 411 412 // AMDGCN GFX6. 413 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX600: 414 return "gfx600"; 415 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX601: 416 return "gfx601"; 417 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX602: 418 return "gfx602"; 419 420 // AMDGCN GFX7. 421 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX700: 422 return "gfx700"; 423 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX701: 424 return "gfx701"; 425 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX702: 426 return "gfx702"; 427 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX703: 428 return "gfx703"; 429 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX704: 430 return "gfx704"; 431 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX705: 432 return "gfx705"; 433 434 // AMDGCN GFX8. 435 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX801: 436 return "gfx801"; 437 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX802: 438 return "gfx802"; 439 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX803: 440 return "gfx803"; 441 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX805: 442 return "gfx805"; 443 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX810: 444 return "gfx810"; 445 446 // AMDGCN GFX9. 447 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX900: 448 return "gfx900"; 449 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX902: 450 return "gfx902"; 451 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX904: 452 return "gfx904"; 453 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX906: 454 return "gfx906"; 455 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX908: 456 return "gfx908"; 457 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX909: 458 return "gfx909"; 459 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX90C: 460 return "gfx90c"; 461 462 // AMDGCN GFX10. 463 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX1010: 464 return "gfx1010"; 465 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX1011: 466 return "gfx1011"; 467 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX1012: 468 return "gfx1012"; 469 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX1030: 470 return "gfx1030"; 471 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX1031: 472 return "gfx1031"; 473 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX1032: 474 return "gfx1032"; 475 case ELF::EF_AMDGPU_MACH_AMDGCN_GFX1033: 476 return "gfx1033"; 477 default: 478 llvm_unreachable("Unknown EF_AMDGPU_MACH value"); 479 } 480 } 481 482 // FIXME Encode from a tablegen description or target parser. 483 void ELFObjectFileBase::setARMSubArch(Triple &TheTriple) const { 484 if (TheTriple.getSubArch() != Triple::NoSubArch) 485 return; 486 487 ARMAttributeParser Attributes; 488 if (Error E = getBuildAttributes(Attributes)) { 489 // TODO Propagate Error. 490 consumeError(std::move(E)); 491 return; 492 } 493 494 std::string Triple; 495 // Default to ARM, but use the triple if it's been set. 496 if (TheTriple.isThumb()) 497 Triple = "thumb"; 498 else 499 Triple = "arm"; 500 501 Optional<unsigned> Attr = 502 Attributes.getAttributeValue(ARMBuildAttrs::CPU_arch); 503 if (Attr.hasValue()) { 504 switch (Attr.getValue()) { 505 case ARMBuildAttrs::v4: 506 Triple += "v4"; 507 break; 508 case ARMBuildAttrs::v4T: 509 Triple += "v4t"; 510 break; 511 case ARMBuildAttrs::v5T: 512 Triple += "v5t"; 513 break; 514 case ARMBuildAttrs::v5TE: 515 Triple += "v5te"; 516 break; 517 case ARMBuildAttrs::v5TEJ: 518 Triple += "v5tej"; 519 break; 520 case ARMBuildAttrs::v6: 521 Triple += "v6"; 522 break; 523 case ARMBuildAttrs::v6KZ: 524 Triple += "v6kz"; 525 break; 526 case ARMBuildAttrs::v6T2: 527 Triple += "v6t2"; 528 break; 529 case ARMBuildAttrs::v6K: 530 Triple += "v6k"; 531 break; 532 case ARMBuildAttrs::v7: 533 Triple += "v7"; 534 break; 535 case ARMBuildAttrs::v6_M: 536 Triple += "v6m"; 537 break; 538 case ARMBuildAttrs::v6S_M: 539 Triple += "v6sm"; 540 break; 541 case ARMBuildAttrs::v7E_M: 542 Triple += "v7em"; 543 break; 544 case ARMBuildAttrs::v8_A: 545 Triple += "v8a"; 546 break; 547 case ARMBuildAttrs::v8_R: 548 Triple += "v8r"; 549 break; 550 case ARMBuildAttrs::v8_M_Base: 551 Triple += "v8m.base"; 552 break; 553 case ARMBuildAttrs::v8_M_Main: 554 Triple += "v8m.main"; 555 break; 556 case ARMBuildAttrs::v8_1_M_Main: 557 Triple += "v8.1m.main"; 558 break; 559 } 560 } 561 if (!isLittleEndian()) 562 Triple += "eb"; 563 564 TheTriple.setArchName(Triple); 565 } 566 567 std::vector<std::pair<Optional<DataRefImpl>, uint64_t>> 568 ELFObjectFileBase::getPltAddresses() const { 569 std::string Err; 570 const auto Triple = makeTriple(); 571 const auto *T = TargetRegistry::lookupTarget(Triple.str(), Err); 572 if (!T) 573 return {}; 574 uint64_t JumpSlotReloc = 0; 575 switch (Triple.getArch()) { 576 case Triple::x86: 577 JumpSlotReloc = ELF::R_386_JUMP_SLOT; 578 break; 579 case Triple::x86_64: 580 JumpSlotReloc = ELF::R_X86_64_JUMP_SLOT; 581 break; 582 case Triple::aarch64: 583 JumpSlotReloc = ELF::R_AARCH64_JUMP_SLOT; 584 break; 585 default: 586 return {}; 587 } 588 std::unique_ptr<const MCInstrInfo> MII(T->createMCInstrInfo()); 589 std::unique_ptr<const MCInstrAnalysis> MIA( 590 T->createMCInstrAnalysis(MII.get())); 591 if (!MIA) 592 return {}; 593 Optional<SectionRef> Plt = None, RelaPlt = None, GotPlt = None; 594 for (const SectionRef &Section : sections()) { 595 Expected<StringRef> NameOrErr = Section.getName(); 596 if (!NameOrErr) { 597 consumeError(NameOrErr.takeError()); 598 continue; 599 } 600 StringRef Name = *NameOrErr; 601 602 if (Name == ".plt") 603 Plt = Section; 604 else if (Name == ".rela.plt" || Name == ".rel.plt") 605 RelaPlt = Section; 606 else if (Name == ".got.plt") 607 GotPlt = Section; 608 } 609 if (!Plt || !RelaPlt || !GotPlt) 610 return {}; 611 Expected<StringRef> PltContents = Plt->getContents(); 612 if (!PltContents) { 613 consumeError(PltContents.takeError()); 614 return {}; 615 } 616 auto PltEntries = MIA->findPltEntries(Plt->getAddress(), 617 arrayRefFromStringRef(*PltContents), 618 GotPlt->getAddress(), Triple); 619 // Build a map from GOT entry virtual address to PLT entry virtual address. 620 DenseMap<uint64_t, uint64_t> GotToPlt; 621 for (const auto &Entry : PltEntries) 622 GotToPlt.insert(std::make_pair(Entry.second, Entry.first)); 623 // Find the relocations in the dynamic relocation table that point to 624 // locations in the GOT for which we know the corresponding PLT entry. 625 std::vector<std::pair<Optional<DataRefImpl>, uint64_t>> Result; 626 for (const auto &Relocation : RelaPlt->relocations()) { 627 if (Relocation.getType() != JumpSlotReloc) 628 continue; 629 auto PltEntryIter = GotToPlt.find(Relocation.getOffset()); 630 if (PltEntryIter != GotToPlt.end()) { 631 symbol_iterator Sym = Relocation.getSymbol(); 632 if (Sym == symbol_end()) 633 Result.emplace_back(None, PltEntryIter->second); 634 else 635 Result.emplace_back(Sym->getRawDataRefImpl(), PltEntryIter->second); 636 } 637 } 638 return Result; 639 } 640