1 //===-- MSP430ELFObjectWriter.cpp - MSP430 ELF Writer ---------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "MCTargetDesc/MSP430FixupKinds.h" 11 #include "MCTargetDesc/MSP430MCTargetDesc.h" 12 13 #include "MCTargetDesc/MSP430MCTargetDesc.h" 14 #include "llvm/MC/MCELFObjectWriter.h" 15 #include "llvm/MC/MCFixup.h" 16 #include "llvm/MC/MCObjectWriter.h" 17 #include "llvm/MC/MCValue.h" 18 #include "llvm/Support/ErrorHandling.h" 19 20 using namespace llvm; 21 22 namespace { 23 class MSP430ELFObjectWriter : public MCELFObjectTargetWriter { 24 public: MSP430ELFObjectWriter(uint8_t OSABI)25 MSP430ELFObjectWriter(uint8_t OSABI) 26 : MCELFObjectTargetWriter(false, OSABI, ELF::EM_MSP430, 27 /*HasRelocationAddend*/ true) {} 28 ~MSP430ELFObjectWriter()29 ~MSP430ELFObjectWriter() override {} 30 31 protected: getRelocType(MCContext & Ctx,const MCValue & Target,const MCFixup & Fixup,bool IsPCRel) const32 unsigned getRelocType(MCContext &Ctx, const MCValue &Target, 33 const MCFixup &Fixup, bool IsPCRel) const override { 34 // Translate fixup kind to ELF relocation type. 35 switch ((unsigned)Fixup.getKind()) { 36 case FK_Data_1: return ELF::R_MSP430_8; 37 case FK_Data_2: return ELF::R_MSP430_16_BYTE; 38 case FK_Data_4: return ELF::R_MSP430_32; 39 case MSP430::fixup_32: return ELF::R_MSP430_32; 40 case MSP430::fixup_10_pcrel: return ELF::R_MSP430_10_PCREL; 41 case MSP430::fixup_16: return ELF::R_MSP430_16; 42 case MSP430::fixup_16_pcrel: return ELF::R_MSP430_16_PCREL; 43 case MSP430::fixup_16_byte: return ELF::R_MSP430_16_BYTE; 44 case MSP430::fixup_16_pcrel_byte: return ELF::R_MSP430_16_PCREL_BYTE; 45 case MSP430::fixup_2x_pcrel: return ELF::R_MSP430_2X_PCREL; 46 case MSP430::fixup_rl_pcrel: return ELF::R_MSP430_RL_PCREL; 47 case MSP430::fixup_8: return ELF::R_MSP430_8; 48 case MSP430::fixup_sym_diff: return ELF::R_MSP430_SYM_DIFF; 49 default: 50 llvm_unreachable("Invalid fixup kind"); 51 } 52 } 53 }; 54 } // end of anonymous namespace 55 56 std::unique_ptr<MCObjectTargetWriter> createMSP430ELFObjectWriter(uint8_t OSABI)57llvm::createMSP430ELFObjectWriter(uint8_t OSABI) { 58 return llvm::make_unique<MSP430ELFObjectWriter>(OSABI); 59 } 60