1 //===-- AVRELFObjectWriter.cpp - AVR 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/AVRFixupKinds.h" 11 #include "MCTargetDesc/AVRMCTargetDesc.h" 12 13 #include "llvm/MC/MCAssembler.h" 14 #include "llvm/MC/MCELFObjectWriter.h" 15 #include "llvm/MC/MCExpr.h" 16 #include "llvm/MC/MCObjectWriter.h" 17 #include "llvm/MC/MCSection.h" 18 #include "llvm/MC/MCValue.h" 19 #include "llvm/Support/ErrorHandling.h" 20 21 namespace llvm { 22 23 /// Writes AVR machine code into an ELF32 object file. 24 class AVRELFObjectWriter : public MCELFObjectTargetWriter { 25 public: 26 AVRELFObjectWriter(uint8_t OSABI); 27 28 virtual ~AVRELFObjectWriter() {} 29 30 unsigned getRelocType(MCContext &Ctx, 31 const MCValue &Target, 32 const MCFixup &Fixup, 33 bool IsPCRel) const override; 34 }; 35 36 AVRELFObjectWriter::AVRELFObjectWriter(uint8_t OSABI) 37 : MCELFObjectTargetWriter(false, OSABI, ELF::EM_AVR, true) {} 38 39 unsigned AVRELFObjectWriter::getRelocType(MCContext &Ctx, 40 const MCValue &Target, 41 const MCFixup &Fixup, 42 bool IsPCRel) const { 43 switch ((unsigned) Fixup.getKind()) { 44 case FK_Data_1: 45 case FK_Data_4: 46 llvm_unreachable("unsupported relocation type"); 47 case FK_Data_2: 48 return ELF::R_AVR_16_PM; 49 case AVR::fixup_32: 50 return ELF::R_AVR_32; 51 case AVR::fixup_7_pcrel: 52 return ELF::R_AVR_7_PCREL; 53 case AVR::fixup_13_pcrel: 54 return ELF::R_AVR_13_PCREL; 55 case AVR::fixup_16: 56 return ELF::R_AVR_16; 57 case AVR::fixup_16_pm: 58 return ELF::R_AVR_16_PM; 59 case AVR::fixup_lo8_ldi: 60 return ELF::R_AVR_LO8_LDI; 61 case AVR::fixup_hi8_ldi: 62 return ELF::R_AVR_HI8_LDI; 63 case AVR::fixup_hh8_ldi: 64 return ELF::R_AVR_HH8_LDI; 65 case AVR::fixup_lo8_ldi_neg: 66 return ELF::R_AVR_LO8_LDI_NEG; 67 case AVR::fixup_hi8_ldi_neg: 68 return ELF::R_AVR_HI8_LDI_NEG; 69 case AVR::fixup_hh8_ldi_neg: 70 return ELF::R_AVR_HH8_LDI_NEG; 71 case AVR::fixup_lo8_ldi_pm: 72 return ELF::R_AVR_LO8_LDI_PM; 73 case AVR::fixup_hi8_ldi_pm: 74 return ELF::R_AVR_HI8_LDI_PM; 75 case AVR::fixup_hh8_ldi_pm: 76 return ELF::R_AVR_HH8_LDI_PM; 77 case AVR::fixup_lo8_ldi_pm_neg: 78 return ELF::R_AVR_LO8_LDI_PM_NEG; 79 case AVR::fixup_hi8_ldi_pm_neg: 80 return ELF::R_AVR_HI8_LDI_PM_NEG; 81 case AVR::fixup_hh8_ldi_pm_neg: 82 return ELF::R_AVR_HH8_LDI_PM_NEG; 83 case AVR::fixup_call: 84 return ELF::R_AVR_CALL; 85 case AVR::fixup_ldi: 86 return ELF::R_AVR_LDI; 87 case AVR::fixup_6: 88 return ELF::R_AVR_6; 89 case AVR::fixup_6_adiw: 90 return ELF::R_AVR_6_ADIW; 91 case AVR::fixup_ms8_ldi: 92 return ELF::R_AVR_MS8_LDI; 93 case AVR::fixup_ms8_ldi_neg: 94 return ELF::R_AVR_MS8_LDI_NEG; 95 case AVR::fixup_lo8_ldi_gs: 96 return ELF::R_AVR_LO8_LDI_GS; 97 case AVR::fixup_hi8_ldi_gs: 98 return ELF::R_AVR_HI8_LDI_GS; 99 case AVR::fixup_8: 100 return ELF::R_AVR_8; 101 case AVR::fixup_8_lo8: 102 return ELF::R_AVR_8_LO8; 103 case AVR::fixup_8_hi8: 104 return ELF::R_AVR_8_HI8; 105 case AVR::fixup_8_hlo8: 106 return ELF::R_AVR_8_HLO8; 107 case AVR::fixup_sym_diff: 108 return ELF::R_AVR_SYM_DIFF; 109 case AVR::fixup_16_ldst: 110 return ELF::R_AVR_16_LDST; 111 case AVR::fixup_lds_sts_16: 112 return ELF::R_AVR_LDS_STS_16; 113 case AVR::fixup_port6: 114 return ELF::R_AVR_PORT6; 115 case AVR::fixup_port5: 116 return ELF::R_AVR_PORT5; 117 default: 118 llvm_unreachable("invalid fixup kind!"); 119 } 120 } 121 122 std::unique_ptr<MCObjectWriter> 123 createAVRELFObjectWriter(raw_pwrite_stream &OS, uint8_t OSABI) { 124 std::unique_ptr<MCELFObjectTargetWriter> MOTW(new AVRELFObjectWriter(OSABI)); 125 return createELFObjectWriter(std::move(MOTW), OS, true); 126 } 127 128 } // end of namespace llvm 129 130