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