1 //===-- LoongArchELFObjectWriter.cpp - LoongArch ELF Writer ---*- C++ -*---===//
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/LoongArchMCTargetDesc.h"
10 #include "llvm/MC/MCContext.h"
11 #include "llvm/MC/MCELFObjectWriter.h"
12 #include "llvm/MC/MCFixup.h"
13 #include "llvm/MC/MCObjectWriter.h"
14 #include "llvm/Support/ErrorHandling.h"
15
16 using namespace llvm;
17
18 namespace {
19 class LoongArchELFObjectWriter : public MCELFObjectTargetWriter {
20 public:
21 LoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit);
22
23 ~LoongArchELFObjectWriter() override;
24
25 // Return true if the given relocation must be with a symbol rather than
26 // section plus offset.
needsRelocateWithSymbol(const MCSymbol & Sym,unsigned Type) const27 bool needsRelocateWithSymbol(const MCSymbol &Sym,
28 unsigned Type) const override {
29 return true;
30 }
31
32 protected:
33 unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
34 const MCFixup &Fixup, bool IsPCRel) const override;
35 };
36 } // end namespace
37
LoongArchELFObjectWriter(uint8_t OSABI,bool Is64Bit)38 LoongArchELFObjectWriter::LoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit)
39 : MCELFObjectTargetWriter(Is64Bit, OSABI, ELF::EM_LOONGARCH,
40 /*HasRelocationAddend*/ true) {}
41
~LoongArchELFObjectWriter()42 LoongArchELFObjectWriter::~LoongArchELFObjectWriter() {}
43
getRelocType(MCContext & Ctx,const MCValue & Target,const MCFixup & Fixup,bool IsPCRel) const44 unsigned LoongArchELFObjectWriter::getRelocType(MCContext &Ctx,
45 const MCValue &Target,
46 const MCFixup &Fixup,
47 bool IsPCRel) const {
48 // Determine the type of the relocation
49 unsigned Kind = Fixup.getTargetKind();
50
51 if (Kind >= FirstLiteralRelocationKind)
52 return Kind - FirstLiteralRelocationKind;
53
54 switch (Kind) {
55 // TODO: Implement this when we defined fixup kind.
56 default:
57 return ELF::R_LARCH_NONE;
58 }
59 }
60
61 std::unique_ptr<MCObjectTargetWriter>
createLoongArchELFObjectWriter(uint8_t OSABI,bool Is64Bit)62 llvm::createLoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit) {
63 return std::make_unique<LoongArchELFObjectWriter>(OSABI, Is64Bit);
64 }
65