181ad6265SDimitry Andric //===-- LoongArchELFObjectWriter.cpp - LoongArch ELF Writer ---*- C++ -*---===// 281ad6265SDimitry Andric // 381ad6265SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 481ad6265SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 581ad6265SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 681ad6265SDimitry Andric // 781ad6265SDimitry Andric //===----------------------------------------------------------------------===// 881ad6265SDimitry Andric 9bdd1243dSDimitry Andric #include "MCTargetDesc/LoongArchFixupKinds.h" 1081ad6265SDimitry Andric #include "MCTargetDesc/LoongArchMCTargetDesc.h" 11bdd1243dSDimitry Andric #include "llvm/BinaryFormat/ELF.h" 1281ad6265SDimitry Andric #include "llvm/MC/MCContext.h" 1381ad6265SDimitry Andric #include "llvm/MC/MCELFObjectWriter.h" 1481ad6265SDimitry Andric #include "llvm/MC/MCFixup.h" 1581ad6265SDimitry Andric #include "llvm/MC/MCObjectWriter.h" 1681ad6265SDimitry Andric #include "llvm/Support/ErrorHandling.h" 1781ad6265SDimitry Andric 1881ad6265SDimitry Andric using namespace llvm; 1981ad6265SDimitry Andric 2081ad6265SDimitry Andric namespace { 2181ad6265SDimitry Andric class LoongArchELFObjectWriter : public MCELFObjectTargetWriter { 2281ad6265SDimitry Andric public: 2381ad6265SDimitry Andric LoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit); 2481ad6265SDimitry Andric 2581ad6265SDimitry Andric ~LoongArchELFObjectWriter() override; 2681ad6265SDimitry Andric 2781ad6265SDimitry Andric protected: 2881ad6265SDimitry Andric unsigned getRelocType(MCContext &Ctx, const MCValue &Target, 2981ad6265SDimitry Andric const MCFixup &Fixup, bool IsPCRel) const override; 3081ad6265SDimitry Andric }; 31972a253aSDimitry Andric } // end namespace 3281ad6265SDimitry Andric 3381ad6265SDimitry Andric LoongArchELFObjectWriter::LoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit) 3481ad6265SDimitry Andric : MCELFObjectTargetWriter(Is64Bit, OSABI, ELF::EM_LOONGARCH, 3581ad6265SDimitry Andric /*HasRelocationAddend*/ true) {} 3681ad6265SDimitry Andric 3781ad6265SDimitry Andric LoongArchELFObjectWriter::~LoongArchELFObjectWriter() {} 3881ad6265SDimitry Andric 3981ad6265SDimitry Andric unsigned LoongArchELFObjectWriter::getRelocType(MCContext &Ctx, 4081ad6265SDimitry Andric const MCValue &Target, 4181ad6265SDimitry Andric const MCFixup &Fixup, 4281ad6265SDimitry Andric bool IsPCRel) const { 4381ad6265SDimitry Andric // Determine the type of the relocation 4481ad6265SDimitry Andric unsigned Kind = Fixup.getTargetKind(); 4581ad6265SDimitry Andric 4681ad6265SDimitry Andric if (Kind >= FirstLiteralRelocationKind) 4781ad6265SDimitry Andric return Kind - FirstLiteralRelocationKind; 4881ad6265SDimitry Andric 4981ad6265SDimitry Andric switch (Kind) { 5081ad6265SDimitry Andric default: 51bdd1243dSDimitry Andric Ctx.reportError(Fixup.getLoc(), "Unsupported relocation type"); 5281ad6265SDimitry Andric return ELF::R_LARCH_NONE; 53bdd1243dSDimitry Andric case FK_Data_1: 54bdd1243dSDimitry Andric Ctx.reportError(Fixup.getLoc(), "1-byte data relocations not supported"); 55bdd1243dSDimitry Andric return ELF::R_LARCH_NONE; 56bdd1243dSDimitry Andric case FK_Data_2: 57bdd1243dSDimitry Andric Ctx.reportError(Fixup.getLoc(), "2-byte data relocations not supported"); 58bdd1243dSDimitry Andric return ELF::R_LARCH_NONE; 59bdd1243dSDimitry Andric case FK_Data_4: 60bdd1243dSDimitry Andric return IsPCRel ? ELF::R_LARCH_32_PCREL : ELF::R_LARCH_32; 61bdd1243dSDimitry Andric case FK_Data_8: 62*06c3fb27SDimitry Andric return IsPCRel ? ELF::R_LARCH_64_PCREL : ELF::R_LARCH_64; 63bdd1243dSDimitry Andric case LoongArch::fixup_loongarch_b16: 64bdd1243dSDimitry Andric return ELF::R_LARCH_B16; 65bdd1243dSDimitry Andric case LoongArch::fixup_loongarch_b21: 66bdd1243dSDimitry Andric return ELF::R_LARCH_B21; 67bdd1243dSDimitry Andric case LoongArch::fixup_loongarch_b26: 68bdd1243dSDimitry Andric return ELF::R_LARCH_B26; 69bdd1243dSDimitry Andric case LoongArch::fixup_loongarch_abs_hi20: 70bdd1243dSDimitry Andric return ELF::R_LARCH_ABS_HI20; 71bdd1243dSDimitry Andric case LoongArch::fixup_loongarch_abs_lo12: 72bdd1243dSDimitry Andric return ELF::R_LARCH_ABS_LO12; 73bdd1243dSDimitry Andric case LoongArch::fixup_loongarch_abs64_lo20: 74bdd1243dSDimitry Andric return ELF::R_LARCH_ABS64_LO20; 75bdd1243dSDimitry Andric case LoongArch::fixup_loongarch_abs64_hi12: 76bdd1243dSDimitry Andric return ELF::R_LARCH_ABS64_HI12; 77bdd1243dSDimitry Andric case LoongArch::fixup_loongarch_tls_le_hi20: 78bdd1243dSDimitry Andric return ELF::R_LARCH_TLS_LE_HI20; 79bdd1243dSDimitry Andric case LoongArch::fixup_loongarch_tls_le_lo12: 80bdd1243dSDimitry Andric return ELF::R_LARCH_TLS_LE_LO12; 81bdd1243dSDimitry Andric case LoongArch::fixup_loongarch_tls_le64_lo20: 82bdd1243dSDimitry Andric return ELF::R_LARCH_TLS_LE64_LO20; 83bdd1243dSDimitry Andric case LoongArch::fixup_loongarch_tls_le64_hi12: 84bdd1243dSDimitry Andric return ELF::R_LARCH_TLS_LE64_HI12; 85bdd1243dSDimitry Andric // TODO: Handle more fixup-kinds. 8681ad6265SDimitry Andric } 8781ad6265SDimitry Andric } 8881ad6265SDimitry Andric 8981ad6265SDimitry Andric std::unique_ptr<MCObjectTargetWriter> 9081ad6265SDimitry Andric llvm::createLoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit) { 9181ad6265SDimitry Andric return std::make_unique<LoongArchELFObjectWriter>(OSABI, Is64Bit); 9281ad6265SDimitry Andric } 93