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1 //===-- LanaiELFObjectWriter.cpp - Lanai ELF Writer -----------------------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #include "MCTargetDesc/LanaiBaseInfo.h"
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11 #include "MCTargetDesc/LanaiFixupKinds.h"
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12 #include "MCTargetDesc/LanaiMCTargetDesc.h"
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13 #include "llvm/MC/MCELFObjectWriter.h"
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14 #include "llvm/MC/MCSymbol.h"
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15 #include "llvm/Support/ErrorHandling.h"
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16 #include "llvm/Support/raw_ostream.h"
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17
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18 using namespace llvm;
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19
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20 namespace {
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21 class LanaiELFObjectWriter : public MCELFObjectTargetWriter {
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22 public:
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23 explicit LanaiELFObjectWriter(uint8_t OSABI);
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24
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25 ~LanaiELFObjectWriter() override;
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26
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27 protected:
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28 unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
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29 const MCFixup &Fixup, bool IsPCRel) const override;
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30 bool needsRelocateWithSymbol(const MCSymbol &SD,
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31 unsigned Type) const override;
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32 };
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33 } // namespace
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34
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35 LanaiELFObjectWriter::LanaiELFObjectWriter(uint8_t OSABI)
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36 : MCELFObjectTargetWriter(/*Is64Bit_=*/false, OSABI, ELF::EM_LANAI,
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37 /*HasRelocationAddend=*/true) {}
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38
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39 LanaiELFObjectWriter::~LanaiELFObjectWriter() {}
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40
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41 unsigned LanaiELFObjectWriter::getRelocType(MCContext & /*Ctx*/,
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42 const MCValue & /*Target*/,
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43 const MCFixup &Fixup,
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44 bool /*IsPCRel*/) const {
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45 unsigned Type;
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46 unsigned Kind = static_cast<unsigned>(Fixup.getKind());
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47 switch (Kind) {
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48 case Lanai::FIXUP_LANAI_21:
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49 Type = ELF::R_LANAI_21;
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50 break;
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51 case Lanai::FIXUP_LANAI_21_F:
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52 Type = ELF::R_LANAI_21_F;
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53 break;
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54 case Lanai::FIXUP_LANAI_25:
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55 Type = ELF::R_LANAI_25;
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56 break;
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57 case Lanai::FIXUP_LANAI_32:
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58 case FK_Data_4:
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59 Type = ELF::R_LANAI_32;
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60 break;
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61 case Lanai::FIXUP_LANAI_HI16:
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62 Type = ELF::R_LANAI_HI16;
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63 break;
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64 case Lanai::FIXUP_LANAI_LO16:
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65 Type = ELF::R_LANAI_LO16;
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66 break;
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67 case Lanai::FIXUP_LANAI_NONE:
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68 Type = ELF::R_LANAI_NONE;
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69 break;
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70
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71 default:
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72 llvm_unreachable("Invalid fixup kind!");
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73 }
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74 return Type;
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75 }
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76
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77 bool LanaiELFObjectWriter::needsRelocateWithSymbol(const MCSymbol & /*SD*/,
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78 unsigned Type) const {
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79 switch (Type) {
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80 case ELF::R_LANAI_21:
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81 case ELF::R_LANAI_21_F:
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82 case ELF::R_LANAI_25:
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83 case ELF::R_LANAI_32:
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84 case ELF::R_LANAI_HI16:
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85 return true;
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86 default:
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87 return false;
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88 }
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89 }
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90
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91 MCObjectWriter *llvm::createLanaiELFObjectWriter(raw_pwrite_stream &OS,
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92 uint8_t OSABI) {
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93 MCELFObjectTargetWriter *MOTW = new LanaiELFObjectWriter(OSABI);
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94 return createELFObjectWriter(MOTW, OS, /*IsLittleEndian=*/false);
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95 }
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