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 "llvm/MC/MCELFObjectWriter.h" 13 #include "llvm/MC/MCFixup.h" 14 #include "llvm/MC/MCObjectWriter.h" 15 #include "llvm/MC/MCValue.h" 16 #include "llvm/Support/ErrorHandling.h" 17 18 using namespace llvm; 19 20 namespace { 21 class MSP430ELFObjectWriter : public MCELFObjectTargetWriter { 22 public: 23 MSP430ELFObjectWriter(uint8_t OSABI) 24 : MCELFObjectTargetWriter(false, OSABI, ELF::EM_MSP430, 25 /*HasRelocationAddend*/ true) {} 26 27 ~MSP430ELFObjectWriter() override = default; 28 29 protected: 30 unsigned getRelocType(MCContext &Ctx, const MCValue &Target, 31 const MCFixup &Fixup, bool IsPCRel) const override { 32 // Translate fixup kind to ELF relocation type. 33 switch (Fixup.getTargetKind()) { 34 case FK_Data_1: return ELF::R_MSP430_8; 35 case FK_Data_2: return ELF::R_MSP430_16_BYTE; 36 case FK_Data_4: return ELF::R_MSP430_32; 37 case MSP430::fixup_32: return ELF::R_MSP430_32; 38 case MSP430::fixup_10_pcrel: return ELF::R_MSP430_10_PCREL; 39 case MSP430::fixup_16: return ELF::R_MSP430_16; 40 case MSP430::fixup_16_pcrel: return ELF::R_MSP430_16_PCREL; 41 case MSP430::fixup_16_byte: return ELF::R_MSP430_16_BYTE; 42 case MSP430::fixup_16_pcrel_byte: return ELF::R_MSP430_16_PCREL_BYTE; 43 case MSP430::fixup_2x_pcrel: return ELF::R_MSP430_2X_PCREL; 44 case MSP430::fixup_rl_pcrel: return ELF::R_MSP430_RL_PCREL; 45 case MSP430::fixup_8: return ELF::R_MSP430_8; 46 case MSP430::fixup_sym_diff: return ELF::R_MSP430_SYM_DIFF; 47 default: 48 llvm_unreachable("Invalid fixup kind"); 49 } 50 } 51 }; 52 } // end of anonymous namespace 53 54 std::unique_ptr<MCObjectTargetWriter> 55 llvm::createMSP430ELFObjectWriter(uint8_t OSABI) { 56 return std::make_unique<MSP430ELFObjectWriter>(OSABI); 57 } 58