1 //===-- LanaiELFObjectWriter.cpp - Lanai ELF Writer -----------------------===//
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 #include "MCTargetDesc/LanaiBaseInfo.h"
10 #include "MCTargetDesc/LanaiFixupKinds.h"
11 #include "llvm/BinaryFormat/ELF.h"
12 #include "llvm/MC/MCELFObjectWriter.h"
13 #include "llvm/MC/MCObjectWriter.h"
14 #include "llvm/Support/ErrorHandling.h"
15
16 using namespace llvm;
17
18 namespace {
19
20 class LanaiELFObjectWriter : public MCELFObjectTargetWriter {
21 public:
22 explicit LanaiELFObjectWriter(uint8_t OSABI);
23
24 ~LanaiELFObjectWriter() override = default;
25
26 protected:
27 unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
28 const MCFixup &Fixup, bool IsPCRel) const override;
29 bool needsRelocateWithSymbol(const MCSymbol &SD,
30 unsigned Type) const override;
31 };
32
33 } // end anonymous namespace
34
LanaiELFObjectWriter(uint8_t OSABI)35 LanaiELFObjectWriter::LanaiELFObjectWriter(uint8_t OSABI)
36 : MCELFObjectTargetWriter(/*Is64Bit_=*/false, OSABI, ELF::EM_LANAI,
37 /*HasRelocationAddend_=*/true) {}
38
getRelocType(MCContext &,const MCValue &,const MCFixup & Fixup,bool) const39 unsigned LanaiELFObjectWriter::getRelocType(MCContext & /*Ctx*/,
40 const MCValue & /*Target*/,
41 const MCFixup &Fixup,
42 bool /*IsPCRel*/) const {
43 unsigned Type;
44 unsigned Kind = static_cast<unsigned>(Fixup.getKind());
45 switch (Kind) {
46 case Lanai::FIXUP_LANAI_21:
47 Type = ELF::R_LANAI_21;
48 break;
49 case Lanai::FIXUP_LANAI_21_F:
50 Type = ELF::R_LANAI_21_F;
51 break;
52 case Lanai::FIXUP_LANAI_25:
53 Type = ELF::R_LANAI_25;
54 break;
55 case Lanai::FIXUP_LANAI_32:
56 case FK_Data_4:
57 Type = ELF::R_LANAI_32;
58 break;
59 case Lanai::FIXUP_LANAI_HI16:
60 Type = ELF::R_LANAI_HI16;
61 break;
62 case Lanai::FIXUP_LANAI_LO16:
63 Type = ELF::R_LANAI_LO16;
64 break;
65 case Lanai::FIXUP_LANAI_NONE:
66 Type = ELF::R_LANAI_NONE;
67 break;
68
69 default:
70 llvm_unreachable("Invalid fixup kind!");
71 }
72 return Type;
73 }
74
needsRelocateWithSymbol(const MCSymbol &,unsigned Type) const75 bool LanaiELFObjectWriter::needsRelocateWithSymbol(const MCSymbol & /*SD*/,
76 unsigned Type) const {
77 switch (Type) {
78 case ELF::R_LANAI_21:
79 case ELF::R_LANAI_21_F:
80 case ELF::R_LANAI_25:
81 case ELF::R_LANAI_32:
82 case ELF::R_LANAI_HI16:
83 return true;
84 default:
85 return false;
86 }
87 }
88
89 std::unique_ptr<MCObjectTargetWriter>
createLanaiELFObjectWriter(uint8_t OSABI)90 llvm::createLanaiELFObjectWriter(uint8_t OSABI) {
91 return std::make_unique<LanaiELFObjectWriter>(OSABI);
92 }
93