1 //===-- LanaiELFObjectWriter.cpp - Lanai ELF Writer -----------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "MCTargetDesc/LanaiBaseInfo.h"
11 #include "MCTargetDesc/LanaiFixupKinds.h"
12 #include "llvm/BinaryFormat/ELF.h"
13 #include "llvm/MC/MCELFObjectWriter.h"
14 #include "llvm/MC/MCObjectWriter.h"
15 #include "llvm/Support/ErrorHandling.h"
16
17 using namespace llvm;
18
19 namespace {
20
21 class LanaiELFObjectWriter : public MCELFObjectTargetWriter {
22 public:
23 explicit LanaiELFObjectWriter(uint8_t OSABI);
24
25 ~LanaiELFObjectWriter() override = default;
26
27 protected:
28 unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
29 const MCFixup &Fixup, bool IsPCRel) const override;
30 bool needsRelocateWithSymbol(const MCSymbol &SD,
31 unsigned Type) const override;
32 };
33
34 } // end anonymous namespace
35
LanaiELFObjectWriter(uint8_t OSABI)36 LanaiELFObjectWriter::LanaiELFObjectWriter(uint8_t OSABI)
37 : MCELFObjectTargetWriter(/*Is64Bit_=*/false, OSABI, ELF::EM_LANAI,
38 /*HasRelocationAddend=*/true) {}
39
getRelocType(MCContext &,const MCValue &,const MCFixup & Fixup,bool) const40 unsigned LanaiELFObjectWriter::getRelocType(MCContext & /*Ctx*/,
41 const MCValue & /*Target*/,
42 const MCFixup &Fixup,
43 bool /*IsPCRel*/) const {
44 unsigned Type;
45 unsigned Kind = static_cast<unsigned>(Fixup.getKind());
46 switch (Kind) {
47 case Lanai::FIXUP_LANAI_21:
48 Type = ELF::R_LANAI_21;
49 break;
50 case Lanai::FIXUP_LANAI_21_F:
51 Type = ELF::R_LANAI_21_F;
52 break;
53 case Lanai::FIXUP_LANAI_25:
54 Type = ELF::R_LANAI_25;
55 break;
56 case Lanai::FIXUP_LANAI_32:
57 case FK_Data_4:
58 Type = ELF::R_LANAI_32;
59 break;
60 case Lanai::FIXUP_LANAI_HI16:
61 Type = ELF::R_LANAI_HI16;
62 break;
63 case Lanai::FIXUP_LANAI_LO16:
64 Type = ELF::R_LANAI_LO16;
65 break;
66 case Lanai::FIXUP_LANAI_NONE:
67 Type = ELF::R_LANAI_NONE;
68 break;
69
70 default:
71 llvm_unreachable("Invalid fixup kind!");
72 }
73 return Type;
74 }
75
needsRelocateWithSymbol(const MCSymbol &,unsigned Type) const76 bool LanaiELFObjectWriter::needsRelocateWithSymbol(const MCSymbol & /*SD*/,
77 unsigned Type) const {
78 switch (Type) {
79 case ELF::R_LANAI_21:
80 case ELF::R_LANAI_21_F:
81 case ELF::R_LANAI_25:
82 case ELF::R_LANAI_32:
83 case ELF::R_LANAI_HI16:
84 return true;
85 default:
86 return false;
87 }
88 }
89
90 std::unique_ptr<MCObjectTargetWriter>
createLanaiELFObjectWriter(uint8_t OSABI)91 llvm::createLanaiELFObjectWriter(uint8_t OSABI) {
92 return llvm::make_unique<LanaiELFObjectWriter>(OSABI);
93 }
94