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(MCContext &Ctx, const MCValue &Target,
28 const MCFixup &Fixup, bool IsPCRel) const override;
29 bool needsRelocateWithSymbol(const MCValue &Val, const MCSymbol &Sym,
30 unsigned Type) const override;
31};
32
33} // end anonymous namespace
34
35LanaiELFObjectWriter::LanaiELFObjectWriter(uint8_t OSABI)
36 : MCELFObjectTargetWriter(/*Is64Bit_=*/false, OSABI, ELF::EM_LANAI,
37 /*HasRelocationAddend_=*/true) {}
38
39unsigned 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
75bool LanaiELFObjectWriter::needsRelocateWithSymbol(const MCValue &,
76 const MCSymbol &,
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
90std::unique_ptr<MCObjectTargetWriter>
91llvm::createLanaiELFObjectWriter(uint8_t OSABI) {
92 return std::make_unique<LanaiELFObjectWriter>(args&: OSABI);
93}
94