1 //===-- MSP430ELFObjectWriter.cpp - MSP430 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/MSP430FixupKinds.h"
10 #include "MCTargetDesc/MSP430MCTargetDesc.h"
11
12 #include "MCTargetDesc/MSP430MCTargetDesc.h"
13 #include "llvm/MC/MCELFObjectWriter.h"
14 #include "llvm/MC/MCFixup.h"
15 #include "llvm/MC/MCObjectWriter.h"
16 #include "llvm/MC/MCValue.h"
17 #include "llvm/Support/ErrorHandling.h"
18
19 using namespace llvm;
20
21 namespace {
22 class MSP430ELFObjectWriter : public MCELFObjectTargetWriter {
23 public:
MSP430ELFObjectWriter(uint8_t OSABI)24 MSP430ELFObjectWriter(uint8_t OSABI)
25 : MCELFObjectTargetWriter(false, OSABI, ELF::EM_MSP430,
26 /*HasRelocationAddend*/ true) {}
27
~MSP430ELFObjectWriter()28 ~MSP430ELFObjectWriter() override {}
29
30 protected:
getRelocType(MCContext & Ctx,const MCValue & Target,const MCFixup & Fixup,bool IsPCRel) const31 unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
32 const MCFixup &Fixup, bool IsPCRel) const override {
33 // Translate fixup kind to ELF relocation type.
34 switch (Fixup.getTargetKind()) {
35 case FK_Data_1: return ELF::R_MSP430_8;
36 case FK_Data_2: return ELF::R_MSP430_16_BYTE;
37 case FK_Data_4: return ELF::R_MSP430_32;
38 case MSP430::fixup_32: return ELF::R_MSP430_32;
39 case MSP430::fixup_10_pcrel: return ELF::R_MSP430_10_PCREL;
40 case MSP430::fixup_16: return ELF::R_MSP430_16;
41 case MSP430::fixup_16_pcrel: return ELF::R_MSP430_16_PCREL;
42 case MSP430::fixup_16_byte: return ELF::R_MSP430_16_BYTE;
43 case MSP430::fixup_16_pcrel_byte: return ELF::R_MSP430_16_PCREL_BYTE;
44 case MSP430::fixup_2x_pcrel: return ELF::R_MSP430_2X_PCREL;
45 case MSP430::fixup_rl_pcrel: return ELF::R_MSP430_RL_PCREL;
46 case MSP430::fixup_8: return ELF::R_MSP430_8;
47 case MSP430::fixup_sym_diff: return ELF::R_MSP430_SYM_DIFF;
48 default:
49 llvm_unreachable("Invalid fixup kind");
50 }
51 }
52 };
53 } // end of anonymous namespace
54
55 std::unique_ptr<MCObjectTargetWriter>
createMSP430ELFObjectWriter(uint8_t OSABI)56 llvm::createMSP430ELFObjectWriter(uint8_t OSABI) {
57 return std::make_unique<MSP430ELFObjectWriter>(OSABI);
58 }
59