1 files changed, 0 insertions, 687 deletions
diff --git a/lld/lib/ReaderWriter/ELF/Mips/MipsRelocationHandler.cpp b/lld/lib/ReaderWriter/ELF/Mips/MipsRelocationHandler.cpp
deleted file mode 100644
index c55a7a4116e..00000000000
--- a/lld/lib/ReaderWriter/ELF/Mips/MipsRelocationHandler.cpp
+++ /dev/null
@@ -1,687 +0,0 @@
-//===- lib/ReaderWriter/ELF/Mips/MipsRelocationHandler.cpp ----------------===//
-//
-//                             The LLVM Linker
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "MipsLinkingContext.h"
-#include "MipsRelocationHandler.h"
-#include "MipsTargetLayout.h"
-#include "llvm/Support/Format.h"
-
-using namespace lld;
-using namespace elf;
-using namespace llvm::ELF;
-using namespace llvm::support;
-
-namespace {
-enum class CrossJumpMode {
-  None,      // Not a jump or non-isa-cross jump
-  ToRegular, // cross isa jump to regular symbol
-  ToMicro,   // cross isa jump to microMips symbol
-  ToMicroJalr// cross isa jump to microMips symbol referenced by R_MIPS_JALR
-};
-
-typedef std::function<std::error_code(int64_t, bool)> OverflowChecker;
-
-static std::error_code dummyCheck(int64_t, bool) {
-  return std::error_code();
-}
-
-template <int BITS> static std::error_code signedCheck(int64_t res, bool) {
-  if (llvm::isInt<BITS>(res))
-    return std::error_code();
-  return make_out_of_range_reloc_error();
-}
-
-template <int BITS>
-static std::error_code gpDispCheck(int64_t res, bool isGpDisp) {
-  if (!isGpDisp || llvm::isInt<BITS>(res))
-    return std::error_code();
-  return make_out_of_range_reloc_error();
-}
-
-struct MipsRelocationParams {
-  uint8_t _size;  // Relocations's size in bytes
-  uint64_t _mask; // Read/write mask of relocation
-  uint8_t _shift; // Relocation's addendum left shift size
-  bool _shuffle;  // Relocation's addendum/result needs to be shuffled
-  OverflowChecker _overflow; // Check the relocation result
-};
-
-template <class ELFT> class RelocationHandler : public TargetRelocationHandler {
-public:
-  RelocationHandler(MipsLinkingContext &ctx, MipsTargetLayout<ELFT> &layout)
-      : _ctx(ctx), _targetLayout(layout) {}
-
-  std::error_code applyRelocation(ELFWriter &writer,
-                                  llvm::FileOutputBuffer &buf,
-                                  const AtomLayout &atom,
-                                  const Reference &ref) const override;
-
-private:
-  MipsLinkingContext &_ctx;
-  MipsTargetLayout<ELFT> &_targetLayout;
-};
-}
-
-static MipsRelocationParams getRelocationParams(uint32_t rType) {
-  switch (rType) {
-  case R_MIPS_NONE:
-    return {4, 0x0, 0, false, dummyCheck};
-  case R_MIPS_64:
-  case R_MIPS_SUB:
-    return {8, 0xffffffffffffffffull, 0, false, dummyCheck};
-  case R_MICROMIPS_SUB:
-    return {8, 0xffffffffffffffffull, 0, true, dummyCheck};
-  case R_MIPS_32:
-  case R_MIPS_GPREL32:
-  case R_MIPS_REL32:
-  case R_MIPS_PC32:
-  case R_MIPS_EH:
-    return {4, 0xffffffff, 0, false, dummyCheck};
-  case LLD_R_MIPS_32_HI16:
-    return {4, 0xffff0000, 0, false, dummyCheck};
-  case LLD_R_MIPS_64_HI16:
-    return {8, 0xffffffffffff0000ull, 0, false, dummyCheck};
-  case R_MIPS_26:
-  case LLD_R_MIPS_GLOBAL_26:
-    return {4, 0x3ffffff, 2, false, dummyCheck};
-  case R_MIPS_PC16:
-    return {4, 0xffff, 2, false, signedCheck<18>};
-  case R_MIPS_PC18_S3:
-    return {4, 0x3ffff, 3, false, signedCheck<21>};
-  case R_MIPS_PC19_S2:
-    return {4, 0x7ffff, 2, false, signedCheck<21>};
-  case R_MIPS_PC21_S2:
-    return {4, 0x1fffff, 2, false, signedCheck<23>};
-  case R_MIPS_PC26_S2:
-    return {4, 0x3ffffff, 2, false, signedCheck<28>};
-  case R_MIPS_HI16:
-    return {4, 0xffff, 0, false, gpDispCheck<16>};
-  case R_MIPS_LO16:
-  case R_MIPS_HIGHER:
-  case R_MIPS_HIGHEST:
-    return {4, 0xffff, 0, false, dummyCheck};
-  case R_MIPS_16:
-  case R_MIPS_PCHI16:
-  case R_MIPS_PCLO16:
-  case R_MIPS_GOT16:
-  case R_MIPS_CALL16:
-  case R_MIPS_GOT_DISP:
-  case R_MIPS_GOT_PAGE:
-  case R_MIPS_GOT_OFST:
-  case R_MIPS_GPREL16:
-  case R_MIPS_TLS_GD:
-  case R_MIPS_TLS_LDM:
-  case R_MIPS_TLS_GOTTPREL:
-  case R_MIPS_LITERAL:
-    return {4, 0xffff, 0, false, signedCheck<16>};
-  case R_MIPS_GOT_HI16:
-  case R_MIPS_GOT_LO16:
-  case R_MIPS_CALL_HI16:
-  case R_MIPS_CALL_LO16:
-  case R_MIPS_TLS_DTPREL_HI16:
-  case R_MIPS_TLS_DTPREL_LO16:
-  case R_MIPS_TLS_TPREL_HI16:
-  case R_MIPS_TLS_TPREL_LO16:
-    return {4, 0xffff, 0, false, dummyCheck};
-  case R_MICROMIPS_GPREL16:
-  case R_MICROMIPS_LITERAL:
-    return {4, 0xffff, 0, true, signedCheck<16>};
-  case R_MICROMIPS_GPREL7_S2:
-    return {4, 0x7f, 2, false, signedCheck<9>};
-  case R_MICROMIPS_GOT_HI16:
-  case R_MICROMIPS_GOT_LO16:
-  case R_MICROMIPS_CALL_HI16:
-  case R_MICROMIPS_CALL_LO16:
-  case R_MICROMIPS_TLS_DTPREL_HI16:
-  case R_MICROMIPS_TLS_DTPREL_LO16:
-  case R_MICROMIPS_TLS_TPREL_HI16:
-  case R_MICROMIPS_TLS_TPREL_LO16:
-    return {4, 0xffff, 0, true, dummyCheck};
-  case R_MICROMIPS_26_S1:
-  case LLD_R_MICROMIPS_GLOBAL_26_S1:
-    return {4, 0x3ffffff, 1, true, dummyCheck};
-  case R_MICROMIPS_HI16:
-    return {4, 0xffff, 0, true, gpDispCheck<16>};
-  case R_MICROMIPS_LO16:
-  case R_MICROMIPS_HI0_LO16:
-  case R_MICROMIPS_HIGHER:
-  case R_MICROMIPS_HIGHEST:
-    return {4, 0xffff, 0, true, dummyCheck};
-  case R_MICROMIPS_PC16_S1:
-    return {4, 0xffff, 1, true, signedCheck<17>};
-  case R_MICROMIPS_PC7_S1:
-    return {4, 0x7f, 1, false, signedCheck<8>};
-  case R_MICROMIPS_PC10_S1:
-    return {4, 0x3ff, 1, false, signedCheck<11>};
-  case R_MICROMIPS_PC23_S2:
-    return {4, 0x7fffff, 2, true, signedCheck<25>};
-  case R_MICROMIPS_PC18_S3:
-    return {4, 0x3ffff, 3, true, signedCheck<21>};
-  case R_MICROMIPS_PC19_S2:
-    return {4, 0x7ffff, 2, true, signedCheck<21>};
-  case R_MICROMIPS_PC21_S2:
-    return {4, 0x1fffff, 2, true, signedCheck<23>};
-  case R_MICROMIPS_PC26_S2:
-    return {4, 0x3ffffff, 2, true, signedCheck<28>};
-  case R_MICROMIPS_GOT16:
-  case R_MICROMIPS_CALL16:
-  case R_MICROMIPS_TLS_GD:
-  case R_MICROMIPS_TLS_LDM:
-  case R_MICROMIPS_TLS_GOTTPREL:
-  case R_MICROMIPS_GOT_DISP:
-  case R_MICROMIPS_GOT_PAGE:
-  case R_MICROMIPS_GOT_OFST:
-    return {4, 0xffff, 0, true, signedCheck<16>};
-  case R_MIPS_JALR:
-    return {4, 0xffffffff, 0, false, dummyCheck};
-  case R_MICROMIPS_JALR:
-    return {4, 0x0, 0, true, dummyCheck};
-  case R_MIPS_JUMP_SLOT:
-  case R_MIPS_COPY:
-  case R_MIPS_TLS_DTPMOD32:
-  case R_MIPS_TLS_DTPREL32:
-  case R_MIPS_TLS_TPREL32:
-    return {4, 0xffffffff, 0, false, dummyCheck};
-  case R_MIPS_TLS_DTPMOD64:
-  case R_MIPS_TLS_DTPREL64:
-  case R_MIPS_TLS_TPREL64:
-    return {8, 0xffffffffffffffffull, 0, false, dummyCheck};
-  case LLD_R_MIPS_GLOBAL_GOT:
-  case LLD_R_MIPS_STO_PLT:
-    // Do nothing.
-    return {4, 0x0, 0, false, dummyCheck};
-  default:
-    llvm_unreachable("Unknown relocation");
-  }
-}
-
-template <class ELFT>
-static uint64_t relocRead(const MipsRelocationParams &params,
-                          const uint8_t *loc);
-
-static int64_t getHi16(int64_t value) {
-  return ((value + 0x8000) >> 16) & 0xffff;
-}
-
-static int64_t getHigher16(int64_t value) {
-  return ((value + 0x80008000ull) >> 32) & 0xffff;
-}
-
-static int64_t getHighest16(int64_t value) {
-  return ((value + 0x800080008000ull) >> 48) & 0xffff;
-}
-
-static int64_t maskLow16(int64_t value) {
-  return (value + 0x8000) & ~0xffff;
-}
-
-/// R_MIPS_GOT_OFST, R_MICROMIPS_GOT_OFST
-/// rel16 offset of (S+A) from the page pointer (verify)
-static int32_t relocGOTOfst(uint64_t S, int64_t A) {
-  int64_t page = maskLow16(S + A);
-  return S + A - page;
-}
-
-/// \brief R_MIPS_PC16
-/// local/external: (S + A - P) >> 2
-static ErrorOr<int64_t> relocPc16(uint64_t P, uint64_t S, int64_t A) {
-  if ((S + A) & 3)
-    return make_unaligned_range_reloc_error();
-  return S + A - P;
-}
-
-/// \brief R_MIPS_PC18_S3, R_MICROMIPS_PC18_S3
-/// local/external: (S + A - P) >> 3 (P with cleared 3 less significant bits)
-static ErrorOr<int64_t> relocPc18(uint64_t P, uint64_t S, int64_t A) {
-  if ((S + A) & 6)
-    return make_unaligned_range_reloc_error();
-  return S + A - ((P | 7) ^ 7);
-}
-
-/// \brief R_MIPS_PC19_S2, R_MICROMIPS_PC19_S2, R_MIPS_PC21_S2,
-/// R_MICROMIPS_PC21_S2, R_MIPS_PC26_S2, R_MICROMIPS_PC26_S2
-/// local/external: (S + A - P) >> 2
-static ErrorOr<int64_t> relocPcS2(uint64_t P, uint64_t S, int64_t A) {
-  if ((S + A) & 2)
-    return make_unaligned_range_reloc_error();
-  return S + A - P;
-}
-
-template <class ELFT>
-static ErrorOr<int64_t> relocJalr(uint64_t P, uint64_t S, bool isCrossJump,
-                                  uint8_t *location) {
-  uint64_t ins = relocRead<ELFT>(getRelocationParams(R_MIPS_JALR), location);
-  if (isCrossJump)
-    return ins;
-  int64_t off = S - P - 4;
-  if (!llvm::isInt<18>(off))
-    return ins;
-  if (ins == 0x0320f809) // jalr t9
-    return 0x04110000 | ((off >> 2) & 0xffff);
-  if (ins == 0x03200008) // jr t9
-    return 0x10000000 | ((off >> 2) & 0xffff);
-  return ins;
-}
-
-static int64_t relocRel32(uint64_t S, int64_t A, bool isLocal) {
-  // If output relocation format is REL and the input one is RELA, the only
-  // method to transfer the relocation addend from the input relocation
-  // to the output dynamic relocation is to save this addend to the location
-  // modified by R_MIPS_REL32.
-  return isLocal ? S + A : A;
-}
-
-static std::error_code adjustJumpOpCode(uint64_t &ins, uint64_t tgt,
-                                        CrossJumpMode mode) {
-  if (mode == CrossJumpMode::None || mode == CrossJumpMode::ToMicroJalr)
-    return std::error_code();
-
-  bool toMicro = mode == CrossJumpMode::ToMicro;
-  uint32_t opNative = toMicro ? 0x03 : 0x3d;
-  uint32_t opCross = toMicro ? 0x1d : 0x3c;
-
-  if ((tgt & 1) != toMicro)
-    return make_dynamic_error_code("Incorrect bit 0 for the jalx target");
-
-  if (tgt & 2)
-    return make_dynamic_error_code(Twine("The jalx target 0x") +
-                                   Twine::utohexstr(tgt) +
-                                   " is not word-aligned");
-  uint8_t op = ins >> 26;
-  if (op != opNative && op != opCross)
-    return make_dynamic_error_code(Twine("Unsupported jump opcode (0x") +
-                                   Twine::utohexstr(op) +
-                                   ") for ISA modes cross call");
-
-  ins = (ins & ~(0x3f << 26)) | (opCross << 26);
-  return std::error_code();
-}
-
-static bool isMicroMipsAtom(const Atom *a) {
-  if (const auto *da = dyn_cast<DefinedAtom>(a))
-    return da->codeModel() == DefinedAtom::codeMipsMicro ||
-           da->codeModel() == DefinedAtom::codeMipsMicroPIC;
-  return false;
-}
-
-static CrossJumpMode getCrossJumpMode(const Reference &ref) {
-  if (!isa<DefinedAtom>(ref.target()))
-    return CrossJumpMode::None;
-  bool isTgtMicro = isMicroMipsAtom(ref.target());
-  switch (ref.kindValue()) {
-  case R_MIPS_JALR:
-    return isTgtMicro ? CrossJumpMode::ToMicroJalr : CrossJumpMode::None;
-  case R_MIPS_26:
-  case LLD_R_MIPS_GLOBAL_26:
-    return isTgtMicro ? CrossJumpMode::ToMicro : CrossJumpMode::None;
-  case R_MICROMIPS_26_S1:
-  case LLD_R_MICROMIPS_GLOBAL_26_S1:
-    return isTgtMicro ? CrossJumpMode::None : CrossJumpMode::ToRegular;
-  default:
-    return CrossJumpMode::None;
-  }
-}
-
-template <class ELFT>
-static ErrorOr<int64_t>
-calculateRelocation(Reference::KindValue kind, Reference::Addend addend,
-                    uint64_t tgtAddr, uint64_t relAddr, uint64_t gpAddr,
-                    uint8_t *location, bool isGP, bool isCrossJump,
-                    bool isDynamic, bool isLocalSym) {
-  switch (kind) {
-  case R_MIPS_NONE:
-    return 0;
-  case R_MIPS_16:
-  case R_MIPS_32:
-  case R_MIPS_64:
-  case R_MIPS_TLS_DTPREL_LO16:
-  case R_MIPS_TLS_TPREL_LO16:
-  case R_MICROMIPS_TLS_DTPREL_LO16:
-  case R_MICROMIPS_TLS_TPREL_LO16:
-  case LLD_R_MIPS_GLOBAL_26:
-  case LLD_R_MICROMIPS_GLOBAL_26_S1:
-    return tgtAddr + addend;
-  case R_MIPS_SUB:
-  case R_MICROMIPS_SUB:
-    return tgtAddr - addend;
-  case R_MIPS_26:
-    return tgtAddr + (addend | (relAddr & 0xf0000000));
-  case R_MICROMIPS_26_S1:
-    return tgtAddr + (addend | (relAddr & 0xf8000000));
-  case R_MIPS_HI16:
-  case R_MICROMIPS_HI16:
-    return getHi16(tgtAddr + addend - (isGP ? relAddr : 0));
-  case R_MIPS_PCHI16:
-    return getHi16(tgtAddr + addend - relAddr);
-  case R_MIPS_LO16:
-    return tgtAddr + addend - (isGP ? relAddr - 4 : 0);
-  case R_MICROMIPS_LO16:
-  case R_MICROMIPS_HI0_LO16:
-    return tgtAddr + addend - (isGP ? relAddr - 3 : 0);
-  case R_MIPS_GOT_HI16:
-  case R_MIPS_CALL_HI16:
-  case R_MICROMIPS_GOT_HI16:
-  case R_MICROMIPS_CALL_HI16:
-    return getHi16(tgtAddr - gpAddr);
-  case R_MIPS_HIGHER:
-  case R_MICROMIPS_HIGHER:
-    return getHigher16(tgtAddr + addend);
-  case R_MIPS_HIGHEST:
-  case R_MICROMIPS_HIGHEST:
-    return getHighest16(tgtAddr + addend);
-  case R_MIPS_GOT_LO16:
-  case R_MIPS_CALL_LO16:
-  case R_MICROMIPS_GOT_LO16:
-  case R_MICROMIPS_CALL_LO16:
-  case R_MIPS_EH:
-  case R_MIPS_GOT16:
-  case R_MIPS_CALL16:
-  case R_MIPS_GOT_DISP:
-  case R_MIPS_GOT_PAGE:
-  case R_MICROMIPS_GOT_DISP:
-  case R_MICROMIPS_GOT_PAGE:
-  case R_MICROMIPS_GOT16:
-  case R_MICROMIPS_CALL16:
-  case R_MIPS_TLS_GD:
-  case R_MIPS_TLS_LDM:
-  case R_MIPS_TLS_GOTTPREL:
-  case R_MICROMIPS_TLS_GD:
-  case R_MICROMIPS_TLS_LDM:
-  case R_MICROMIPS_TLS_GOTTPREL:
-    return tgtAddr - gpAddr;
-  case R_MIPS_GPREL16:
-  case R_MIPS_GPREL32:
-  case R_MIPS_LITERAL:
-  case R_MICROMIPS_GPREL16:
-  case R_MICROMIPS_GPREL7_S2:
-  case R_MICROMIPS_LITERAL:
-    return tgtAddr + addend - gpAddr;
-  case R_MIPS_GOT_OFST:
-  case R_MICROMIPS_GOT_OFST:
-    return relocGOTOfst(tgtAddr, addend);
-  case R_MIPS_PC16:
-    return relocPc16(relAddr, tgtAddr, addend);
-  case R_MIPS_PC18_S3:
-  case R_MICROMIPS_PC18_S3:
-    return relocPc18(relAddr, tgtAddr, addend);
-  case R_MIPS_PC19_S2:
-  case R_MICROMIPS_PC19_S2:
-  case R_MIPS_PC21_S2:
-  case R_MICROMIPS_PC21_S2:
-  case R_MIPS_PC26_S2:
-  case R_MICROMIPS_PC26_S2:
-    return relocPcS2(relAddr, tgtAddr, addend);
-  case R_MIPS_PC32:
-  case R_MIPS_PCLO16:
-  case R_MICROMIPS_PC7_S1:
-  case R_MICROMIPS_PC10_S1:
-  case R_MICROMIPS_PC16_S1:
-  case R_MICROMIPS_PC23_S2:
-    return tgtAddr + addend - relAddr;
-  case R_MIPS_TLS_DTPREL_HI16:
-  case R_MIPS_TLS_TPREL_HI16:
-  case R_MICROMIPS_TLS_DTPREL_HI16:
-  case R_MICROMIPS_TLS_TPREL_HI16:
-    return getHi16(tgtAddr + addend);
-  case R_MIPS_JALR:
-    return relocJalr<ELFT>(relAddr, tgtAddr, isCrossJump, location);
-  case R_MICROMIPS_JALR:
-    // We do not do JALR optimization now.
-    return 0;
-  case R_MIPS_REL32:
-    return relocRel32(tgtAddr, addend, isLocalSym);
-  case R_MIPS_JUMP_SLOT:
-  case R_MIPS_COPY:
-    // Ignore runtime relocations.
-    return 0;
-  case R_MIPS_TLS_DTPMOD32:
-  case R_MIPS_TLS_DTPMOD64:
-    return isDynamic ? 0 : 1;
-  case R_MIPS_TLS_DTPREL32:
-  case R_MIPS_TLS_DTPREL64:
-    return isDynamic ? 0 : tgtAddr + addend - 0x8000;
-  case R_MIPS_TLS_TPREL32:
-  case R_MIPS_TLS_TPREL64:
-    return isDynamic ? 0 : tgtAddr + addend - 0x7000;
-  case LLD_R_MIPS_32_HI16:
-  case LLD_R_MIPS_64_HI16:
-    return maskLow16(tgtAddr + addend);
-  case LLD_R_MIPS_STO_PLT:
-  case LLD_R_MIPS_GLOBAL_GOT:
-    // Do nothing.
-    return 0;
-  default:
-    return make_unhandled_reloc_error();
-  }
-}
-
-template <class ELFT>
-static uint64_t relocRead(const MipsRelocationParams &params,
-                          const uint8_t *loc) {
-  assert((params._size == 4 || params._size == 8) && "Unexpected size");
-  uint64_t data = 0;
-  memcpy(&data, loc, params._size);
-  if (params._shuffle) {
-    using namespace endian;
-    auto p = reinterpret_cast<const uint8_t *>(&data);
-    uint32_t a = readNext<uint16_t, ELFT::TargetEndianness, unaligned>(p);
-    uint32_t b = read<uint16_t, ELFT::TargetEndianness, unaligned>(p);
-    write<uint32_t, ELFT::TargetEndianness, unaligned>(&data, a << 16 | b);
-  }
-  switch (params._size) {
-  case 4:
-    return endian::read<uint32_t, ELFT::TargetEndianness, unaligned>(&data);
-  case 8:
-    return endian::read<uint64_t, ELFT::TargetEndianness, unaligned>(&data);
-  default:
-    llvm_unreachable("Unexpected size");
-  }
-}
-
-template <class ELFT>
-static void relocWrite(uint64_t data, const MipsRelocationParams &params,
-                       uint8_t *loc) {
-  switch (params._size) {
-  case 4:
-    endian::write<uint32_t, ELFT::TargetEndianness, unaligned>(loc, data);
-    break;
-  case 8:
-    endian::write<uint64_t, ELFT::TargetEndianness, unaligned>(loc, data);
-    break;
-  default:
-    llvm_unreachable("Unexpected size");
-  }
-  if (params._shuffle) {
-    uint32_t v = endian::read<uint32_t, ELFT::TargetEndianness, unaligned>(loc);
-    uint16_t a = v >> 16;
-    uint16_t b = v & 0xffff;
-    endian::write<uint16_t, ELFT::TargetEndianness, unaligned>(loc, a);
-    endian::write<uint16_t, ELFT::TargetEndianness, unaligned>(loc + 2, b);
-  }
-}
-
-static uint32_t getRelKind(const Reference &ref, size_t num) {
-  if (num == 0)
-    return ref.kindValue();
-  if (num > 2)
-    return R_MIPS_NONE;
-  return (ref.tag() >> (8 * (num - 1))) & 0xff;
-}
-
-static uint8_t getRelShift(Reference::KindValue kind,
-                           const MipsRelocationParams &params,
-                           bool isCrossJump) {
-  uint8_t shift = params._shift;
-  if (isCrossJump &&
-      (kind == R_MICROMIPS_26_S1 || kind == LLD_R_MICROMIPS_GLOBAL_26_S1))
-    return 2;
-  return shift;
-}
-
-static bool isLocalTarget(const Atom *a) {
-  if (auto *da = dyn_cast<DefinedAtom>(a))
-    return da->scope() == Atom::scopeTranslationUnit;
-  return false;
-}
-
-template <class ELFT>
-std::error_code RelocationHandler<ELFT>::applyRelocation(
-    ELFWriter &writer, llvm::FileOutputBuffer &buf, const AtomLayout &atom,
-    const Reference &ref) const {
-  if (ref.kindNamespace() != Reference::KindNamespace::ELF)
-    return std::error_code();
-  assert(ref.kindArch() == Reference::KindArch::Mips);
-
-  uint64_t gpAddr = _targetLayout.getGPAddr();
-  bool isGpDisp = ref.target()->name() == "_gp_disp";
-  bool isLocalSym = isLocalTarget(ref.target());
-
-  uint8_t *atomContent = buf.getBufferStart() + atom._fileOffset;
-  uint8_t *location = atomContent + ref.offsetInAtom();
-  uint64_t tgtAddr = writer.addressOfAtom(ref.target());
-  uint64_t relAddr = atom._virtualAddr + ref.offsetInAtom();
-
-  if (isMicroMipsAtom(ref.target()))
-    tgtAddr |= 1;
-
-  CrossJumpMode jumpMode = getCrossJumpMode(ref);
-  bool isCrossJump = jumpMode != CrossJumpMode::None;
-
-  uint64_t sym = tgtAddr;
-  ErrorOr<int64_t> res = ref.addend();
-  Reference::KindValue lastRel = R_MIPS_NONE;
-
-  for (size_t relNum = 0; relNum < 3; ++relNum) {
-    Reference::KindValue kind = getRelKind(ref, relNum);
-    if (kind == R_MIPS_NONE)
-      break;
-    auto params = getRelocationParams(kind);
-    res = calculateRelocation<ELFT>(kind, *res, sym, relAddr, gpAddr, location,
-                                    isGpDisp, isCrossJump, _ctx.isDynamic(),
-                                    isLocalSym);
-    if (auto ec = res.getError())
-      return ec;
-    // Check result for the last relocation only.
-    if (getRelKind(ref, relNum + 1) == R_MIPS_NONE) {
-      if (auto ec = params._overflow(*res, isGpDisp))
-        return ec;
-    }
-    res = *res >> getRelShift(kind, params, isCrossJump);
-    // FIXME (simon): Handle r_ssym value.
-    sym = 0;
-    isGpDisp = false;
-    isCrossJump = false;
-    lastRel = kind;
-  }
-
-  auto params = getRelocationParams(lastRel);
-  uint64_t ins = relocRead<ELFT>(params, location);
-  if (auto ec = adjustJumpOpCode(ins, tgtAddr, jumpMode))
-    return ec;
-
-  ins = (ins & ~params._mask) | (*res & params._mask);
-  relocWrite<ELFT>(ins, params, location);
-
-  return std::error_code();
-}
-
-namespace lld {
-namespace elf {
-
-template <>
-std::unique_ptr<TargetRelocationHandler>
-createMipsRelocationHandler<ELF32BE>(MipsLinkingContext &ctx,
-                                     MipsTargetLayout<ELF32BE> &layout) {
-  return llvm::make_unique<RelocationHandler<ELF32BE>>(ctx, layout);
-}
-
-template <>
-std::unique_ptr<TargetRelocationHandler>
-createMipsRelocationHandler<ELF32LE>(MipsLinkingContext &ctx,
-                                     MipsTargetLayout<ELF32LE> &layout) {
-  return llvm::make_unique<RelocationHandler<ELF32LE>>(ctx, layout);
-}
-
-template <>
-std::unique_ptr<TargetRelocationHandler>
-createMipsRelocationHandler<ELF64BE>(MipsLinkingContext &ctx,
-                                     MipsTargetLayout<ELF64BE> &layout) {
-  return llvm::make_unique<RelocationHandler<ELF64BE>>(ctx, layout);
-}
-
-template <>
-std::unique_ptr<TargetRelocationHandler>
-createMipsRelocationHandler<ELF64LE>(MipsLinkingContext &ctx,
-                                     MipsTargetLayout<ELF64LE> &layout) {
-  return llvm::make_unique<RelocationHandler<ELF64LE>>(ctx, layout);
-}
-
-template <class ELFT>
-Reference::Addend readMipsRelocAddend(Reference::KindValue kind,
-                                      const uint8_t *content) {
-  auto params = getRelocationParams(kind);
-  uint64_t ins = relocRead<ELFT>(params, content);
-  int64_t res = (ins & params._mask) << params._shift;
-  switch (kind) {
-  case R_MIPS_GPREL16:
-  case R_MICROMIPS_GPREL16:
-  case R_MIPS_PCLO16:
-  case R_MIPS_LITERAL:
-  case R_MICROMIPS_LITERAL:
-    return llvm::SignExtend32<16>(res);
-  case R_MIPS_PC16:
-    return llvm::SignExtend32<18>(res);
-  case R_MICROMIPS_GPREL7_S2:
-    return llvm::SignExtend32<9>(res);
-  case R_MICROMIPS_PC7_S1:
-    return llvm::SignExtend32<8>(res);
-  case R_MICROMIPS_PC10_S1:
-    return llvm::SignExtend32<11>(res);
-  case R_MIPS_16:
-    return llvm::SignExtend32<16>(res);
-  case R_MICROMIPS_PC16_S1:
-    return llvm::SignExtend32<17>(res);
-  case R_MIPS_PC18_S3:
-  case R_MIPS_PC19_S2:
-  case R_MICROMIPS_PC18_S3:
-  case R_MICROMIPS_PC19_S2:
-    return llvm::SignExtend32<21>(res);
-  case R_MIPS_PC21_S2:
-  case R_MICROMIPS_PC21_S2:
-    return llvm::SignExtend32<23>(res);
-  case R_MICROMIPS_PC23_S2:
-    return llvm::SignExtend32<25>(res);
-  case R_MICROMIPS_26_S1:
-    return llvm::SignExtend32<27>(res);
-  case R_MIPS_26:
-  case R_MIPS_PC26_S2:
-  case R_MICROMIPS_PC26_S2:
-    return llvm::SignExtend32<28>(res);
-  default:
-    // Nothing to do
-    break;
-  }
-  return res;
-}
-
-template
-Reference::Addend readMipsRelocAddend<ELF32BE>(Reference::KindValue kind,
-                                               const uint8_t *content);
-template
-Reference::Addend readMipsRelocAddend<ELF32LE>(Reference::KindValue kind,
-                                               const uint8_t *content);
-template
-Reference::Addend readMipsRelocAddend<ELF64BE>(Reference::KindValue kind,
-                                               const uint8_t *content);
-template
-Reference::Addend readMipsRelocAddend<ELF64LE>(Reference::KindValue kind,
-                                               const uint8_t *content);
-
-} // elf
-} // lld