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_JAL: { 224 int64_t Value = E.getTarget().getAddress() + E.getAddend() - FixupAddress; 225 Error AlignmentIssue = checkAlignment(FixupAddress, Value, 2, E); 226 if (AlignmentIssue) { 227 return AlignmentIssue; 228 } 229 uint32_t Imm20 = extractBits(Value, 20, 1) << 31; 230 uint32_t Imm10_1 = extractBits(Value, 1, 10) << 21; 231 uint32_t Imm11 = extractBits(Value, 11, 1) << 20; 232 uint32_t Imm19_12 = extractBits(Value, 12, 8) << 12; 233 uint32_t RawInstr = *(little32_t *)FixupPtr; 234 *(little32_t *)FixupPtr = RawInstr | Imm20 | Imm10_1 | Imm11 | Imm19_12; 235 break; 236 } 237 case R_RISCV_HI20: { 238 int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue(); 239 int64_t Hi = Value + 0x800; 240 if (LLVM_UNLIKELY(!isInRangeForImmS32(Hi))) 241 return makeTargetOutOfRangeError(G, B, E); 242 uint32_t RawInstr = *(little32_t *)FixupPtr; 243 *(little32_t *)FixupPtr = 244 (RawInstr & 0xFFF) | (static_cast<uint32_t>(Hi & 0xFFFFF000)); 245 break; 246 } 247 case R_RISCV_LO12_I: { 248 // FIXME: We assume that R_RISCV_HI20 is present in object code and pairs 249 // with current relocation R_RISCV_LO12_I. So here may need a check. 250 int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue(); 251 int32_t Lo = Value & 0xFFF; 252 uint32_t RawInstr = *(little32_t *)FixupPtr; 253 *(little32_t *)FixupPtr = 254 (RawInstr & 0xFFFFF) | (static_cast<uint32_t>(Lo & 0xFFF) << 20); 255 break; 256 } 257 case R_RISCV_CALL: { 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 int32_t Lo = Value & 0xFFF; 263 uint32_t RawInstrAuipc = *(little32_t *)FixupPtr; 264 uint32_t RawInstrJalr = *(little32_t *)(FixupPtr + 4); 265 *(little32_t *)FixupPtr = 266 RawInstrAuipc | (static_cast<uint32_t>(Hi & 0xFFFFF000)); 267 *(little32_t *)(FixupPtr + 4) = 268 RawInstrJalr | (static_cast<uint32_t>(Lo) << 20); 269 break; 270 } 271 case R_RISCV_PCREL_HI20: { 272 int64_t Value = E.getTarget().getAddress() + E.getAddend() - FixupAddress; 273 int64_t Hi = Value + 0x800; 274 if (LLVM_UNLIKELY(!isInRangeForImmS32(Hi))) 275 return makeTargetOutOfRangeError(G, B, E); 276 uint32_t RawInstr = *(little32_t *)FixupPtr; 277 *(little32_t *)FixupPtr = 278 (RawInstr & 0xFFF) | (static_cast<uint32_t>(Hi & 0xFFFFF000)); 279 break; 280 } 281 case R_RISCV_PCREL_LO12_I: { 282 // FIXME: We assume that R_RISCV_PCREL_HI20 is present in object code and 283 // pairs with current relocation R_RISCV_PCREL_LO12_I. So here may need a 284 // check. 285 auto RelHI20 = getRISCVPCRelHi20(E); 286 if (!RelHI20) 287 return RelHI20.takeError(); 288 int64_t Value = RelHI20->getTarget().getAddress() + 289 RelHI20->getAddend() - E.getTarget().getAddress(); 290 int64_t Lo = Value & 0xFFF; 291 uint32_t RawInstr = *(little32_t *)FixupPtr; 292 *(little32_t *)FixupPtr = 293 (RawInstr & 0xFFFFF) | (static_cast<uint32_t>(Lo & 0xFFF) << 20); 294 break; 295 } 296 case R_RISCV_PCREL_LO12_S: { 297 // FIXME: We assume that R_RISCV_PCREL_HI20 is present in object code and 298 // pairs with current relocation R_RISCV_PCREL_LO12_S. So here may need a 299 // check. 300 auto RelHI20 = getRISCVPCRelHi20(E); 301 int64_t Value = RelHI20->getTarget().getAddress() + 302 RelHI20->getAddend() - E.getTarget().getAddress(); 303 int64_t Lo = Value & 0xFFF; 304 uint32_t Imm31_25 = extractBits(Lo, 5, 7) << 25; 305 uint32_t Imm11_7 = extractBits(Lo, 0, 5) << 7; 306 uint32_t RawInstr = *(little32_t *)FixupPtr; 307 308 *(little32_t *)FixupPtr = (RawInstr & 0x1FFF07F) | Imm31_25 | Imm11_7; 309 break; 310 } 311 case R_RISCV_ADD64: { 312 int64_t Value = (E.getTarget().getAddress() + 313 support::endian::read64le(reinterpret_cast<const void *>( 314 FixupAddress.getValue())) + 315 E.getAddend()) 316 .getValue(); 317 *(little64_t *)FixupPtr = static_cast<uint64_t>(Value); 318 break; 319 } 320 case R_RISCV_ADD32: { 321 int64_t Value = (E.getTarget().getAddress() + 322 support::endian::read32le(reinterpret_cast<const void *>( 323 FixupAddress.getValue())) + 324 E.getAddend()) 325 .getValue(); 326 *(little32_t *)FixupPtr = static_cast<uint32_t>(Value); 327 break; 328 } 329 case R_RISCV_ADD16: { 330 int64_t Value = (E.getTarget().getAddress() + 331 support::endian::read16le(reinterpret_cast<const void *>( 332 FixupAddress.getValue())) + 333 E.getAddend()) 334 .getValue(); 335 *(little16_t *)FixupPtr = static_cast<uint32_t>(Value); 336 break; 337 } 338 case R_RISCV_ADD8: { 339 int64_t Value = 340 (E.getTarget().getAddress() + 341 *(reinterpret_cast<const uint8_t *>(FixupAddress.getValue())) + 342 E.getAddend()) 343 .getValue(); 344 *FixupPtr = static_cast<uint8_t>(Value); 345 break; 346 } 347 case R_RISCV_SUB64: { 348 int64_t Value = support::endian::read64le(reinterpret_cast<const void *>( 349 FixupAddress.getValue())) - 350 E.getTarget().getAddress().getValue() - E.getAddend(); 351 *(little64_t *)FixupPtr = static_cast<uint64_t>(Value); 352 break; 353 } 354 case R_RISCV_SUB32: { 355 int64_t Value = support::endian::read32le(reinterpret_cast<const void *>( 356 FixupAddress.getValue())) - 357 E.getTarget().getAddress().getValue() - E.getAddend(); 358 *(little32_t *)FixupPtr = static_cast<uint32_t>(Value); 359 break; 360 } 361 case R_RISCV_SUB16: { 362 int64_t Value = support::endian::read16le(reinterpret_cast<const void *>( 363 FixupAddress.getValue())) - 364 E.getTarget().getAddress().getValue() - E.getAddend(); 365 *(little16_t *)FixupPtr = static_cast<uint32_t>(Value); 366 break; 367 } 368 case R_RISCV_SUB8: { 369 int64_t Value = 370 *(reinterpret_cast<const uint8_t *>(FixupAddress.getValue())) - 371 E.getTarget().getAddress().getValue() - E.getAddend(); 372 *FixupPtr = static_cast<uint8_t>(Value); 373 break; 374 } 375 case R_RISCV_SUB6: { 376 int64_t Value = 377 *(reinterpret_cast<const uint8_t *>(FixupAddress.getValue())) & 378 0x3f - E.getTarget().getAddress().getValue() - E.getAddend(); 379 *FixupPtr = (*FixupPtr & 0xc0) | (static_cast<uint8_t>(Value) & 0x3f); 380 break; 381 } 382 case R_RISCV_SET6: { 383 int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue(); 384 uint32_t RawData = *(little32_t *)FixupPtr; 385 int64_t Word6 = Value & 0x3f; 386 *(little32_t *)FixupPtr = (RawData & 0xffffffc0) | Word6; 387 break; 388 } 389 case R_RISCV_SET8: { 390 int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue(); 391 uint32_t RawData = *(little32_t *)FixupPtr; 392 int64_t Word8 = Value & 0xff; 393 *(little32_t *)FixupPtr = (RawData & 0xffffff00) | Word8; 394 break; 395 } 396 case R_RISCV_SET16: { 397 int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue(); 398 uint32_t RawData = *(little32_t *)FixupPtr; 399 int64_t Word16 = Value & 0xffff; 400 *(little32_t *)FixupPtr = (RawData & 0xffff0000) | Word16; 401 break; 402 } 403 case R_RISCV_SET32: { 404 int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue(); 405 int64_t Word32 = Value & 0xffffffff; 406 *(little32_t *)FixupPtr = Word32; 407 break; 408 } 409 case R_RISCV_32_PCREL: { 410 int64_t Value = E.getTarget().getAddress() + E.getAddend() - FixupAddress; 411 int64_t Word32 = Value & 0xffffffff; 412 *(little32_t *)FixupPtr = Word32; 413 break; 414 } 415 } 416 return Error::success(); 417 } 418 }; 419 420 template <typename ELFT> 421 class ELFLinkGraphBuilder_riscv : public ELFLinkGraphBuilder<ELFT> { 422 private: 423 static Expected<riscv::EdgeKind_riscv> 424 getRelocationKind(const uint32_t Type) { 425 using namespace riscv; 426 switch (Type) { 427 case ELF::R_RISCV_32: 428 return EdgeKind_riscv::R_RISCV_32; 429 case ELF::R_RISCV_64: 430 return EdgeKind_riscv::R_RISCV_64; 431 case ELF::R_RISCV_BRANCH: 432 return EdgeKind_riscv::R_RISCV_BRANCH; 433 case ELF::R_RISCV_JAL: 434 return EdgeKind_riscv::R_RISCV_JAL; 435 case ELF::R_RISCV_HI20: 436 return EdgeKind_riscv::R_RISCV_HI20; 437 case ELF::R_RISCV_LO12_I: 438 return EdgeKind_riscv::R_RISCV_LO12_I; 439 case ELF::R_RISCV_CALL: 440 return EdgeKind_riscv::R_RISCV_CALL; 441 case ELF::R_RISCV_PCREL_HI20: 442 return EdgeKind_riscv::R_RISCV_PCREL_HI20; 443 case ELF::R_RISCV_PCREL_LO12_I: 444 return EdgeKind_riscv::R_RISCV_PCREL_LO12_I; 445 case ELF::R_RISCV_PCREL_LO12_S: 446 return EdgeKind_riscv::R_RISCV_PCREL_LO12_S; 447 case ELF::R_RISCV_GOT_HI20: 448 return EdgeKind_riscv::R_RISCV_GOT_HI20; 449 case ELF::R_RISCV_CALL_PLT: 450 return EdgeKind_riscv::R_RISCV_CALL_PLT; 451 case ELF::R_RISCV_ADD64: 452 return EdgeKind_riscv::R_RISCV_ADD64; 453 case ELF::R_RISCV_ADD32: 454 return EdgeKind_riscv::R_RISCV_ADD32; 455 case ELF::R_RISCV_ADD16: 456 return EdgeKind_riscv::R_RISCV_ADD16; 457 case ELF::R_RISCV_ADD8: 458 return EdgeKind_riscv::R_RISCV_ADD8; 459 case ELF::R_RISCV_SUB64: 460 return EdgeKind_riscv::R_RISCV_SUB64; 461 case ELF::R_RISCV_SUB32: 462 return EdgeKind_riscv::R_RISCV_SUB32; 463 case ELF::R_RISCV_SUB16: 464 return EdgeKind_riscv::R_RISCV_SUB16; 465 case ELF::R_RISCV_SUB8: 466 return EdgeKind_riscv::R_RISCV_SUB8; 467 case ELF::R_RISCV_SUB6: 468 return EdgeKind_riscv::R_RISCV_SUB6; 469 case ELF::R_RISCV_SET6: 470 return EdgeKind_riscv::R_RISCV_SET6; 471 case ELF::R_RISCV_SET8: 472 return EdgeKind_riscv::R_RISCV_SET8; 473 case ELF::R_RISCV_SET16: 474 return EdgeKind_riscv::R_RISCV_SET16; 475 case ELF::R_RISCV_SET32: 476 return EdgeKind_riscv::R_RISCV_SET32; 477 case ELF::R_RISCV_32_PCREL: 478 return EdgeKind_riscv::R_RISCV_32_PCREL; 479 } 480 481 return make_error<JITLinkError>("Unsupported riscv relocation:" + 482 formatv("{0:d}", Type)); 483 } 484 485 Error addRelocations() override { 486 LLVM_DEBUG(dbgs() << "Processing relocations:\n"); 487 488 using Base = ELFLinkGraphBuilder<ELFT>; 489 using Self = ELFLinkGraphBuilder_riscv<ELFT>; 490 for (const auto &RelSect : Base::Sections) 491 if (Error Err = Base::forEachRelocation(RelSect, this, 492 &Self::addSingleRelocation)) 493 return Err; 494 495 return Error::success(); 496 } 497 498 Error addSingleRelocation(const typename ELFT::Rela &Rel, 499 const typename ELFT::Shdr &FixupSect, 500 Block &BlockToFix) { 501 using Base = ELFLinkGraphBuilder<ELFT>; 502 503 uint32_t SymbolIndex = Rel.getSymbol(false); 504 auto ObjSymbol = Base::Obj.getRelocationSymbol(Rel, Base::SymTabSec); 505 if (!ObjSymbol) 506 return ObjSymbol.takeError(); 507 508 Symbol *GraphSymbol = Base::getGraphSymbol(SymbolIndex); 509 if (!GraphSymbol) 510 return make_error<StringError>( 511 formatv("Could not find symbol at given index, did you add it to " 512 "JITSymbolTable? index: {0}, shndx: {1} Size of table: {2}", 513 SymbolIndex, (*ObjSymbol)->st_shndx, 514 Base::GraphSymbols.size()), 515 inconvertibleErrorCode()); 516 517 uint32_t Type = Rel.getType(false); 518 Expected<riscv::EdgeKind_riscv> Kind = getRelocationKind(Type); 519 if (!Kind) 520 return Kind.takeError(); 521 522 int64_t Addend = Rel.r_addend; 523 auto FixupAddress = orc::ExecutorAddr(FixupSect.sh_addr) + Rel.r_offset; 524 Edge::OffsetT Offset = FixupAddress - BlockToFix.getAddress(); 525 Edge GE(*Kind, Offset, *GraphSymbol, Addend); 526 LLVM_DEBUG({ 527 dbgs() << " "; 528 printEdge(dbgs(), BlockToFix, GE, riscv::getEdgeKindName(*Kind)); 529 dbgs() << "\n"; 530 }); 531 532 BlockToFix.addEdge(std::move(GE)); 533 return Error::success(); 534 } 535 536 public: 537 ELFLinkGraphBuilder_riscv(StringRef FileName, 538 const object::ELFFile<ELFT> &Obj, const Triple T) 539 : ELFLinkGraphBuilder<ELFT>(Obj, std::move(T), FileName, 540 riscv::getEdgeKindName) {} 541 }; 542 543 Expected<std::unique_ptr<LinkGraph>> 544 createLinkGraphFromELFObject_riscv(MemoryBufferRef ObjectBuffer) { 545 LLVM_DEBUG({ 546 dbgs() << "Building jitlink graph for new input " 547 << ObjectBuffer.getBufferIdentifier() << "...\n"; 548 }); 549 550 auto ELFObj = object::ObjectFile::createELFObjectFile(ObjectBuffer); 551 if (!ELFObj) 552 return ELFObj.takeError(); 553 554 if ((*ELFObj)->getArch() == Triple::riscv64) { 555 auto &ELFObjFile = cast<object::ELFObjectFile<object::ELF64LE>>(**ELFObj); 556 return ELFLinkGraphBuilder_riscv<object::ELF64LE>( 557 (*ELFObj)->getFileName(), ELFObjFile.getELFFile(), 558 (*ELFObj)->makeTriple()) 559 .buildGraph(); 560 } else { 561 assert((*ELFObj)->getArch() == Triple::riscv32 && 562 "Invalid triple for RISCV ELF object file"); 563 auto &ELFObjFile = cast<object::ELFObjectFile<object::ELF32LE>>(**ELFObj); 564 return ELFLinkGraphBuilder_riscv<object::ELF32LE>( 565 (*ELFObj)->getFileName(), ELFObjFile.getELFFile(), 566 (*ELFObj)->makeTriple()) 567 .buildGraph(); 568 } 569 } 570 571 void link_ELF_riscv(std::unique_ptr<LinkGraph> G, 572 std::unique_ptr<JITLinkContext> Ctx) { 573 PassConfiguration Config; 574 const Triple &TT = G->getTargetTriple(); 575 if (Ctx->shouldAddDefaultTargetPasses(TT)) { 576 if (auto MarkLive = Ctx->getMarkLivePass(TT)) 577 Config.PrePrunePasses.push_back(std::move(MarkLive)); 578 else 579 Config.PrePrunePasses.push_back(markAllSymbolsLive); 580 Config.PostPrunePasses.push_back( 581 PerGraphGOTAndPLTStubsBuilder_ELF_riscv::asPass); 582 } 583 if (auto Err = Ctx->modifyPassConfig(*G, Config)) 584 return Ctx->notifyFailed(std::move(Err)); 585 586 ELFJITLinker_riscv::link(std::move(Ctx), std::move(G), std::move(Config)); 587 } 588 589 } // namespace jitlink 590 } // namespace llvm 591