LLVM 19.0.0git
LanaiELFObjectWriter.cpp
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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
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) {
47 Type = ELF::R_LANAI_21;
48 break;
50 Type = ELF::R_LANAI_21_F;
51 break;
53 Type = ELF::R_LANAI_25;
54 break;
56 case FK_Data_4:
57 Type = ELF::R_LANAI_32;
58 break;
60 Type = ELF::R_LANAI_HI16;
61 break;
63 Type = ELF::R_LANAI_LO16;
64 break;
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>
92 return std::make_unique<LanaiELFObjectWriter>(OSABI);
93}
basic Basic Alias true
Symbol * Sym
Definition: ELF_riscv.cpp:479
PowerPC TLS Dynamic Call Fixup
Context object for machine code objects.
Definition: MCContext.h:76
virtual bool needsRelocateWithSymbol(const MCValue &Val, const MCSymbol &Sym, unsigned Type) const
virtual unsigned getRelocType(MCContext &Ctx, const MCValue &Target, const MCFixup &Fixup, bool IsPCRel) const =0
Encode information on a single operation to perform on a byte sequence (e.g., an encoded instruction)...
Definition: MCFixup.h:71
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:40
This represents an "assembler immediate".
Definition: MCValue.h:36
Target - Wrapper for Target specific information.
The instances of the Type class are immutable: once they are created, they are never changed.
Definition: Type.h:45
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
@ EM_LANAI
Definition: ELF.h:318
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
@ FK_Data_4
A four-byte fixup.
Definition: MCFixup.h:25
std::unique_ptr< MCObjectTargetWriter > createLanaiELFObjectWriter(uint8_t OSABI)