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: 24 MSP430ELFObjectWriter(uint8_t OSABI) 25 : MCELFObjectTargetWriter(false, OSABI, ELF::EM_MSP430, 26 /*HasRelocationAddend*/ true) {} 27 28 ~MSP430ELFObjectWriter() override {} 29 30 protected: 31 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> 56 llvm::createMSP430ELFObjectWriter(uint8_t OSABI) { 57 return std::make_unique<MSP430ELFObjectWriter>(OSABI); 58 } 59