1 //===------- ELF_riscv.cpp -JIT linker implementation for ELF/riscv -------===// 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 // ELF/riscv jit-link implementation. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "llvm/ExecutionEngine/JITLink/ELF_riscv.h" 14 #include "ELFLinkGraphBuilder.h" 15 #include "JITLinkGeneric.h" 16 #include "PerGraphGOTAndPLTStubsBuilder.h" 17 #include "llvm/BinaryFormat/ELF.h" 18 #include "llvm/ExecutionEngine/JITLink/JITLink.h" 19 #include "llvm/ExecutionEngine/JITLink/riscv.h" 20 #include "llvm/Object/ELF.h" 21 #include "llvm/Object/ELFObjectFile.h" 22 #include "llvm/Support/Endian.h" 23 24 #define DEBUG_TYPE "jitlink" 25 using namespace llvm; 26 using namespace llvm::jitlink; 27 using namespace llvm::jitlink::riscv; 28 29 namespace { 30 31 class PerGraphGOTAndPLTStubsBuilder_ELF_riscv 32 : public PerGraphGOTAndPLTStubsBuilder< 33 PerGraphGOTAndPLTStubsBuilder_ELF_riscv> { 34 public: 35 static constexpr size_t StubEntrySize = 16; 36 static const uint8_t NullGOTEntryContent[8]; 37 static const uint8_t RV64StubContent[StubEntrySize]; 38 static const uint8_t RV32StubContent[StubEntrySize]; 39 40 using PerGraphGOTAndPLTStubsBuilder< 41 PerGraphGOTAndPLTStubsBuilder_ELF_riscv>::PerGraphGOTAndPLTStubsBuilder; 42 43 bool isRV64() const { return G.getPointerSize() == 8; } 44 45 bool isGOTEdgeToFix(Edge &E) const { return E.getKind() == R_RISCV_GOT_HI20; } 46 47 Symbol &createGOTEntry(Symbol &Target) { 48 Block &GOTBlock = 49 G.createContentBlock(getGOTSection(), getGOTEntryBlockContent(), 50 orc::ExecutorAddr(), G.getPointerSize(), 0); 51 GOTBlock.addEdge(isRV64() ? R_RISCV_64 : R_RISCV_32, 0, Target, 0); 52 return G.addAnonymousSymbol(GOTBlock, 0, G.getPointerSize(), false, false); 53 } 54 55 Symbol &createPLTStub(Symbol &Target) { 56 Block &StubContentBlock = G.createContentBlock( 57 getStubsSection(), getStubBlockContent(), orc::ExecutorAddr(), 4, 0); 58 auto &GOTEntrySymbol = getGOTEntry(Target); 59 StubContentBlock.addEdge(R_RISCV_CALL, 0, GOTEntrySymbol, 0); 60 return G.addAnonymousSymbol(StubContentBlock, 0, StubEntrySize, true, 61 false); 62 } 63 64 void fixGOTEdge(Edge &E, Symbol &GOTEntry) { 65 // Replace the relocation pair (R_RISCV_GOT_HI20, R_RISCV_PCREL_LO12) 66 // with (R_RISCV_PCREL_HI20, R_RISCV_PCREL_LO12) 67 // Therefore, here just change the R_RISCV_GOT_HI20 to R_RISCV_PCREL_HI20 68 E.setKind(R_RISCV_PCREL_HI20); 69 E.setTarget(GOTEntry); 70 } 71 72 void fixPLTEdge(Edge &E, Symbol &PLTStubs) { 73 assert(E.getKind() == R_RISCV_CALL_PLT && "Not a R_RISCV_CALL_PLT edge?"); 74 E.setKind(R_RISCV_CALL); 75 E.setTarget(PLTStubs); 76 } 77 78 bool isExternalBranchEdge(Edge &E) const { 79 return E.getKind() == R_RISCV_CALL_PLT; 80 } 81 82 private: 83 Section &getGOTSection() const { 84 if (!GOTSection) 85 GOTSection = &G.createSection("$__GOT", MemProt::Read); 86 return *GOTSection; 87 } 88 89 Section &getStubsSection() const { 90 if (!StubsSection) 91 StubsSection = 92 &G.createSection("$__STUBS", MemProt::Read | MemProt::Exec); 93 return *StubsSection; 94 } 95 96 ArrayRef<char> getGOTEntryBlockContent() { 97 return {reinterpret_cast<const char *>(NullGOTEntryContent), 98 G.getPointerSize()}; 99 } 100 101 ArrayRef<char> getStubBlockContent() { 102 auto StubContent = isRV64() ? RV64StubContent : RV32StubContent; 103 return {reinterpret_cast<const char *>(StubContent), StubEntrySize}; 104 } 105 106 mutable Section *GOTSection = nullptr; 107 mutable Section *StubsSection = nullptr; 108 }; 109 110 const uint8_t PerGraphGOTAndPLTStubsBuilder_ELF_riscv::NullGOTEntryContent[8] = 111 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; 112 113 const uint8_t 114 PerGraphGOTAndPLTStubsBuilder_ELF_riscv::RV64StubContent[StubEntrySize] = { 115 0x17, 0x0e, 0x00, 0x00, // auipc t3, literal 116 0x03, 0x3e, 0x0e, 0x00, // ld t3, literal(t3) 117 0x67, 0x00, 0x0e, 0x00, // jr t3 118 0x13, 0x00, 0x00, 0x00}; // nop 119 120 const uint8_t 121 PerGraphGOTAndPLTStubsBuilder_ELF_riscv::RV32StubContent[StubEntrySize] = { 122 0x17, 0x0e, 0x00, 0x00, // auipc t3, literal 123 0x03, 0x2e, 0x0e, 0x00, // lw t3, literal(t3) 124 0x67, 0x00, 0x0e, 0x00, // jr t3 125 0x13, 0x00, 0x00, 0x00}; // nop 126 } // namespace 127 namespace llvm { 128 namespace jitlink { 129 130 static Expected<const Edge &> getRISCVPCRelHi20(const Edge &E) { 131 using namespace riscv; 132 assert((E.getKind() == R_RISCV_PCREL_LO12_I || 133 E.getKind() == R_RISCV_PCREL_LO12_S) && 134 "Can only have high relocation for R_RISCV_PCREL_LO12_I or " 135 "R_RISCV_PCREL_LO12_S"); 136 137 const Symbol &Sym = E.getTarget(); 138 const Block &B = Sym.getBlock(); 139 orc::ExecutorAddrDiff Offset = Sym.getOffset(); 140 141 struct Comp { 142 bool operator()(const Edge &Lhs, orc::ExecutorAddrDiff Offset) { 143 return Lhs.getOffset() < Offset; 144 } 145 bool operator()(orc::ExecutorAddrDiff Offset, const Edge &Rhs) { 146 return Offset < Rhs.getOffset(); 147 } 148 }; 149 150 auto Bound = 151 std::equal_range(B.edges().begin(), B.edges().end(), Offset, Comp{}); 152 153 for (auto It = Bound.first; It != Bound.second; ++It) { 154 if (It->getKind() == R_RISCV_PCREL_HI20) 155 return *It; 156 } 157 158 return make_error<JITLinkError>( 159 "No HI20 PCREL relocation type be found for LO12 PCREL relocation type"); 160 } 161 162 static uint32_t extractBits(uint32_t Num, unsigned Low, unsigned Size) { 163 return (Num & (((1ULL << Size) - 1) << Low)) >> Low; 164 } 165 166 inline Error checkAlignment(llvm::orc::ExecutorAddr loc, uint64_t v, int n, 167 const Edge &E) { 168 if (v & (n - 1)) 169 return make_error<JITLinkError>("0x" + llvm::utohexstr(loc.getValue()) + 170 " improper alignment for relocation " + 171 formatv("{0:d}", E.getKind()) + ": 0x" + 172 llvm::utohexstr(v) + " is not aligned to " + 173 Twine(n) + " bytes"); 174 return Error::success(); 175 } 176 177 static inline bool isInRangeForImmS32(int64_t Value) { 178 return (Value >= std::numeric_limits<int32_t>::min() && 179 Value <= std::numeric_limits<int32_t>::max()); 180 } 181 182 class ELFJITLinker_riscv : public JITLinker<ELFJITLinker_riscv> { 183 friend class JITLinker<ELFJITLinker_riscv>; 184 185 public: 186 ELFJITLinker_riscv(std::unique_ptr<JITLinkContext> Ctx, 187 std::unique_ptr<LinkGraph> G, PassConfiguration PassConfig) 188 : JITLinker(std::move(Ctx), std::move(G), std::move(PassConfig)) {} 189 190 private: 191 Error applyFixup(LinkGraph &G, Block &B, const Edge &E) const { 192 using namespace riscv; 193 using namespace llvm::support; 194 195 char *BlockWorkingMem = B.getAlreadyMutableContent().data(); 196 char *FixupPtr = BlockWorkingMem + E.getOffset(); 197 orc::ExecutorAddr FixupAddress = B.getAddress() + E.getOffset(); 198 switch (E.getKind()) { 199 case R_RISCV_32: { 200 int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue(); 201 *(little32_t *)FixupPtr = static_cast<uint32_t>(Value); 202 break; 203 } 204 case R_RISCV_64: { 205 int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue(); 206 *(little64_t *)FixupPtr = static_cast<uint64_t>(Value); 207 break; 208 } 209 case R_RISCV_BRANCH: { 210 int64_t Value = E.getTarget().getAddress() + E.getAddend() - FixupAddress; 211 Error AlignmentIssue = checkAlignment(FixupAddress, Value, 2, E); 212 if (AlignmentIssue) { 213 return AlignmentIssue; 214 } 215 uint32_t Imm31_25 = 216 extractBits(Value, 5, 6) << 25 | extractBits(Value, 12, 1) << 31; 217 uint32_t Imm11_7 = 218 extractBits(Value, 1, 4) << 8 | extractBits(Value, 11, 1) << 7; 219 uint32_t RawInstr = *(little32_t *)FixupPtr; 220 *(little32_t *)FixupPtr = (RawInstr & 0x1FFF07F) | Imm31_25 | Imm11_7; 221 break; 222 } 223 case R_RISCV_HI20: { 224 int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue(); 225 int64_t Hi = Value + 0x800; 226 if (LLVM_UNLIKELY(!isInRangeForImmS32(Hi))) 227 return makeTargetOutOfRangeError(G, B, E); 228 uint32_t RawInstr = *(little32_t *)FixupPtr; 229 *(little32_t *)FixupPtr = 230 (RawInstr & 0xFFF) | (static_cast<uint32_t>(Hi & 0xFFFFF000)); 231 break; 232 } 233 case R_RISCV_LO12_I: { 234 // FIXME: We assume that R_RISCV_HI20 is present in object code and pairs 235 // with current relocation R_RISCV_LO12_I. So here may need a check. 236 int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue(); 237 int32_t Lo = Value & 0xFFF; 238 uint32_t RawInstr = *(little32_t *)FixupPtr; 239 *(little32_t *)FixupPtr = 240 (RawInstr & 0xFFFFF) | (static_cast<uint32_t>(Lo & 0xFFF) << 20); 241 break; 242 } 243 case R_RISCV_CALL: { 244 int64_t Value = E.getTarget().getAddress() + E.getAddend() - FixupAddress; 245 int64_t Hi = Value + 0x800; 246 if (LLVM_UNLIKELY(!isInRangeForImmS32(Hi))) 247 return makeTargetOutOfRangeError(G, B, E); 248 int32_t Lo = Value & 0xFFF; 249 uint32_t RawInstrAuipc = *(little32_t *)FixupPtr; 250 uint32_t RawInstrJalr = *(little32_t *)(FixupPtr + 4); 251 *(little32_t *)FixupPtr = 252 RawInstrAuipc | (static_cast<uint32_t>(Hi & 0xFFFFF000)); 253 *(little32_t *)(FixupPtr + 4) = 254 RawInstrJalr | (static_cast<uint32_t>(Lo) << 20); 255 break; 256 } 257 case R_RISCV_PCREL_HI20: { 258 int64_t Value = E.getTarget().getAddress() + E.getAddend() - FixupAddress; 259 int64_t Hi = Value + 0x800; 260 if (LLVM_UNLIKELY(!isInRangeForImmS32(Hi))) 261 return makeTargetOutOfRangeError(G, B, E); 262 uint32_t RawInstr = *(little32_t *)FixupPtr; 263 *(little32_t *)FixupPtr = 264 (RawInstr & 0xFFF) | (static_cast<uint32_t>(Hi & 0xFFFFF000)); 265 break; 266 } 267 case R_RISCV_PCREL_LO12_I: { 268 // FIXME: We assume that R_RISCV_PCREL_HI20 is present in object code and 269 // pairs with current relocation R_RISCV_PCREL_LO12_I. So here may need a 270 // check. 271 auto RelHI20 = getRISCVPCRelHi20(E); 272 if (!RelHI20) 273 return RelHI20.takeError(); 274 int64_t Value = RelHI20->getTarget().getAddress() + 275 RelHI20->getAddend() - E.getTarget().getAddress(); 276 int64_t Lo = Value & 0xFFF; 277 uint32_t RawInstr = *(little32_t *)FixupPtr; 278 *(little32_t *)FixupPtr = 279 (RawInstr & 0xFFFFF) | (static_cast<uint32_t>(Lo & 0xFFF) << 20); 280 break; 281 } 282 case R_RISCV_PCREL_LO12_S: { 283 // FIXME: We assume that R_RISCV_PCREL_HI20 is present in object code and 284 // pairs with current relocation R_RISCV_PCREL_LO12_S. So here may need a 285 // check. 286 auto RelHI20 = getRISCVPCRelHi20(E); 287 int64_t Value = RelHI20->getTarget().getAddress() + 288 RelHI20->getAddend() - E.getTarget().getAddress(); 289 int64_t Lo = Value & 0xFFF; 290 uint32_t Imm31_25 = extractBits(Lo, 5, 7) << 25; 291 uint32_t Imm11_7 = extractBits(Lo, 0, 5) << 7; 292 uint32_t RawInstr = *(little32_t *)FixupPtr; 293 294 *(little32_t *)FixupPtr = (RawInstr & 0x1FFF07F) | Imm31_25 | Imm11_7; 295 break; 296 } 297 case R_RISCV_ADD64: { 298 int64_t Value = (E.getTarget().getAddress() + 299 support::endian::read64le(reinterpret_cast<const void *>( 300 FixupAddress.getValue())) + 301 E.getAddend()) 302 .getValue(); 303 *(little64_t *)FixupPtr = static_cast<uint64_t>(Value); 304 break; 305 } 306 case R_RISCV_ADD32: { 307 int64_t Value = (E.getTarget().getAddress() + 308 support::endian::read32le(reinterpret_cast<const void *>( 309 FixupAddress.getValue())) + 310 E.getAddend()) 311 .getValue(); 312 *(little32_t *)FixupPtr = static_cast<uint32_t>(Value); 313 break; 314 } 315 case R_RISCV_ADD16: { 316 int64_t Value = (E.getTarget().getAddress() + 317 support::endian::read16le(reinterpret_cast<const void *>( 318 FixupAddress.getValue())) + 319 E.getAddend()) 320 .getValue(); 321 *(little16_t *)FixupPtr = static_cast<uint32_t>(Value); 322 break; 323 } 324 case R_RISCV_ADD8: { 325 int64_t Value = 326 (E.getTarget().getAddress() + 327 *(reinterpret_cast<const uint8_t *>(FixupAddress.getValue())) + 328 E.getAddend()) 329 .getValue(); 330 *FixupPtr = static_cast<uint8_t>(Value); 331 break; 332 } 333 case R_RISCV_SUB64: { 334 int64_t Value = support::endian::read64le(reinterpret_cast<const void *>( 335 FixupAddress.getValue())) - 336 E.getTarget().getAddress().getValue() - E.getAddend(); 337 *(little64_t *)FixupPtr = static_cast<uint64_t>(Value); 338 break; 339 } 340 case R_RISCV_SUB32: { 341 int64_t Value = support::endian::read32le(reinterpret_cast<const void *>( 342 FixupAddress.getValue())) - 343 E.getTarget().getAddress().getValue() - E.getAddend(); 344 *(little32_t *)FixupPtr = static_cast<uint32_t>(Value); 345 break; 346 } 347 case R_RISCV_SUB16: { 348 int64_t Value = support::endian::read16le(reinterpret_cast<const void *>( 349 FixupAddress.getValue())) - 350 E.getTarget().getAddress().getValue() - E.getAddend(); 351 *(little16_t *)FixupPtr = static_cast<uint32_t>(Value); 352 break; 353 } 354 case R_RISCV_SUB8: { 355 int64_t Value = 356 *(reinterpret_cast<const uint8_t *>(FixupAddress.getValue())) - 357 E.getTarget().getAddress().getValue() - E.getAddend(); 358 *FixupPtr = static_cast<uint8_t>(Value); 359 break; 360 } 361 case R_RISCV_SET6: { 362 int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue(); 363 uint32_t RawData = *(little32_t *)FixupPtr; 364 int64_t Word6 = Value & 0x3f; 365 *(little32_t *)FixupPtr = (RawData & 0xffffffc0) | Word6; 366 break; 367 } 368 case R_RISCV_SET8: { 369 int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue(); 370 uint32_t RawData = *(little32_t *)FixupPtr; 371 int64_t Word8 = Value & 0xff; 372 *(little32_t *)FixupPtr = (RawData & 0xffffff00) | Word8; 373 break; 374 } 375 case R_RISCV_SET16: { 376 int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue(); 377 uint32_t RawData = *(little32_t *)FixupPtr; 378 int64_t Word16 = Value & 0xffff; 379 *(little32_t *)FixupPtr = (RawData & 0xffff0000) | Word16; 380 break; 381 } 382 case R_RISCV_SET32: { 383 int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue(); 384 int64_t Word32 = Value & 0xffffffff; 385 *(little32_t *)FixupPtr = Word32; 386 break; 387 } 388 case R_RISCV_32_PCREL: { 389 int64_t Value = E.getTarget().getAddress() + E.getAddend() - FixupAddress; 390 int64_t Word32 = Value & 0xffffffff; 391 *(little32_t *)FixupPtr = Word32; 392 break; 393 } 394 } 395 return Error::success(); 396 } 397 }; 398 399 template <typename ELFT> 400 class ELFLinkGraphBuilder_riscv : public ELFLinkGraphBuilder<ELFT> { 401 private: 402 static Expected<riscv::EdgeKind_riscv> 403 getRelocationKind(const uint32_t Type) { 404 using namespace riscv; 405 switch (Type) { 406 case ELF::R_RISCV_32: 407 return EdgeKind_riscv::R_RISCV_32; 408 case ELF::R_RISCV_64: 409 return EdgeKind_riscv::R_RISCV_64; 410 case ELF::R_RISCV_BRANCH: 411 return EdgeKind_riscv::R_RISCV_BRANCH; 412 case ELF::R_RISCV_HI20: 413 return EdgeKind_riscv::R_RISCV_HI20; 414 case ELF::R_RISCV_LO12_I: 415 return EdgeKind_riscv::R_RISCV_LO12_I; 416 case ELF::R_RISCV_CALL: 417 return EdgeKind_riscv::R_RISCV_CALL; 418 case ELF::R_RISCV_PCREL_HI20: 419 return EdgeKind_riscv::R_RISCV_PCREL_HI20; 420 case ELF::R_RISCV_PCREL_LO12_I: 421 return EdgeKind_riscv::R_RISCV_PCREL_LO12_I; 422 case ELF::R_RISCV_PCREL_LO12_S: 423 return EdgeKind_riscv::R_RISCV_PCREL_LO12_S; 424 case ELF::R_RISCV_GOT_HI20: 425 return EdgeKind_riscv::R_RISCV_GOT_HI20; 426 case ELF::R_RISCV_CALL_PLT: 427 return EdgeKind_riscv::R_RISCV_CALL_PLT; 428 case ELF::R_RISCV_ADD64: 429 return EdgeKind_riscv::R_RISCV_ADD64; 430 case ELF::R_RISCV_ADD32: 431 return EdgeKind_riscv::R_RISCV_ADD32; 432 case ELF::R_RISCV_ADD16: 433 return EdgeKind_riscv::R_RISCV_ADD16; 434 case ELF::R_RISCV_ADD8: 435 return EdgeKind_riscv::R_RISCV_ADD8; 436 case ELF::R_RISCV_SUB64: 437 return EdgeKind_riscv::R_RISCV_SUB64; 438 case ELF::R_RISCV_SUB32: 439 return EdgeKind_riscv::R_RISCV_SUB32; 440 case ELF::R_RISCV_SUB16: 441 return EdgeKind_riscv::R_RISCV_SUB16; 442 case ELF::R_RISCV_SUB8: 443 return EdgeKind_riscv::R_RISCV_SUB8; 444 case ELF::R_RISCV_SET6: 445 return EdgeKind_riscv::R_RISCV_SET6; 446 case ELF::R_RISCV_SET8: 447 return EdgeKind_riscv::R_RISCV_SET8; 448 case ELF::R_RISCV_SET16: 449 return EdgeKind_riscv::R_RISCV_SET16; 450 case ELF::R_RISCV_SET32: 451 return EdgeKind_riscv::R_RISCV_SET32; 452 case ELF::R_RISCV_32_PCREL: 453 return EdgeKind_riscv::R_RISCV_32_PCREL; 454 } 455 456 return make_error<JITLinkError>("Unsupported riscv relocation:" + 457 formatv("{0:d}", Type)); 458 } 459 460 Error addRelocations() override { 461 LLVM_DEBUG(dbgs() << "Processing relocations:\n"); 462 463 using Base = ELFLinkGraphBuilder<ELFT>; 464 using Self = ELFLinkGraphBuilder_riscv<ELFT>; 465 for (const auto &RelSect : Base::Sections) 466 if (Error Err = Base::forEachRelocation(RelSect, this, 467 &Self::addSingleRelocation)) 468 return Err; 469 470 return Error::success(); 471 } 472 473 Error addSingleRelocation(const typename ELFT::Rela &Rel, 474 const typename ELFT::Shdr &FixupSect, 475 Block &BlockToFix) { 476 using Base = ELFLinkGraphBuilder<ELFT>; 477 478 uint32_t SymbolIndex = Rel.getSymbol(false); 479 auto ObjSymbol = Base::Obj.getRelocationSymbol(Rel, Base::SymTabSec); 480 if (!ObjSymbol) 481 return ObjSymbol.takeError(); 482 483 Symbol *GraphSymbol = Base::getGraphSymbol(SymbolIndex); 484 if (!GraphSymbol) 485 return make_error<StringError>( 486 formatv("Could not find symbol at given index, did you add it to " 487 "JITSymbolTable? index: {0}, shndx: {1} Size of table: {2}", 488 SymbolIndex, (*ObjSymbol)->st_shndx, 489 Base::GraphSymbols.size()), 490 inconvertibleErrorCode()); 491 492 uint32_t Type = Rel.getType(false); 493 Expected<riscv::EdgeKind_riscv> Kind = getRelocationKind(Type); 494 if (!Kind) 495 return Kind.takeError(); 496 497 int64_t Addend = Rel.r_addend; 498 auto FixupAddress = orc::ExecutorAddr(FixupSect.sh_addr) + Rel.r_offset; 499 Edge::OffsetT Offset = FixupAddress - BlockToFix.getAddress(); 500 Edge GE(*Kind, Offset, *GraphSymbol, Addend); 501 LLVM_DEBUG({ 502 dbgs() << " "; 503 printEdge(dbgs(), BlockToFix, GE, riscv::getEdgeKindName(*Kind)); 504 dbgs() << "\n"; 505 }); 506 507 BlockToFix.addEdge(std::move(GE)); 508 return Error::success(); 509 } 510 511 public: 512 ELFLinkGraphBuilder_riscv(StringRef FileName, 513 const object::ELFFile<ELFT> &Obj, const Triple T) 514 : ELFLinkGraphBuilder<ELFT>(Obj, std::move(T), FileName, 515 riscv::getEdgeKindName) {} 516 }; 517 518 Expected<std::unique_ptr<LinkGraph>> 519 createLinkGraphFromELFObject_riscv(MemoryBufferRef ObjectBuffer) { 520 LLVM_DEBUG({ 521 dbgs() << "Building jitlink graph for new input " 522 << ObjectBuffer.getBufferIdentifier() << "...\n"; 523 }); 524 525 auto ELFObj = object::ObjectFile::createELFObjectFile(ObjectBuffer); 526 if (!ELFObj) 527 return ELFObj.takeError(); 528 529 if ((*ELFObj)->getArch() == Triple::riscv64) { 530 auto &ELFObjFile = cast<object::ELFObjectFile<object::ELF64LE>>(**ELFObj); 531 return ELFLinkGraphBuilder_riscv<object::ELF64LE>( 532 (*ELFObj)->getFileName(), ELFObjFile.getELFFile(), 533 (*ELFObj)->makeTriple()) 534 .buildGraph(); 535 } else { 536 assert((*ELFObj)->getArch() == Triple::riscv32 && 537 "Invalid triple for RISCV ELF object file"); 538 auto &ELFObjFile = cast<object::ELFObjectFile<object::ELF32LE>>(**ELFObj); 539 return ELFLinkGraphBuilder_riscv<object::ELF32LE>( 540 (*ELFObj)->getFileName(), ELFObjFile.getELFFile(), 541 (*ELFObj)->makeTriple()) 542 .buildGraph(); 543 } 544 } 545 546 void link_ELF_riscv(std::unique_ptr<LinkGraph> G, 547 std::unique_ptr<JITLinkContext> Ctx) { 548 PassConfiguration Config; 549 const Triple &TT = G->getTargetTriple(); 550 if (Ctx->shouldAddDefaultTargetPasses(TT)) { 551 if (auto MarkLive = Ctx->getMarkLivePass(TT)) 552 Config.PrePrunePasses.push_back(std::move(MarkLive)); 553 else 554 Config.PrePrunePasses.push_back(markAllSymbolsLive); 555 Config.PostPrunePasses.push_back( 556 PerGraphGOTAndPLTStubsBuilder_ELF_riscv::asPass); 557 } 558 if (auto Err = Ctx->modifyPassConfig(*G, Config)) 559 return Ctx->notifyFailed(std::move(Err)); 560 561 ELFJITLinker_riscv::link(std::move(Ctx), std::move(G), std::move(Config)); 562 } 563 564 } // namespace jitlink 565 } // namespace llvm 566