//===-- SparcELFObjectWriter.cpp - Sparc ELF Writer -----------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// #include "MCTargetDesc/SparcFixupKinds.h" #include "MCTargetDesc/SparcMCExpr.h" #include "MCTargetDesc/SparcMCTargetDesc.h" #include "llvm/ADT/STLExtras.h" #include "llvm/MC/MCELFObjectWriter.h" #include "llvm/MC/MCExpr.h" #include "llvm/MC/MCObjectWriter.h" #include "llvm/MC/MCValue.h" #include "llvm/Support/ErrorHandling.h" using namespace llvm; namespace { class SparcELFObjectWriter : public MCELFObjectTargetWriter { public: SparcELFObjectWriter(bool Is64Bit, bool HasV9, uint8_t OSABI) : MCELFObjectTargetWriter( Is64Bit, OSABI, Is64Bit ? ELF::EM_SPARCV9 : (HasV9 ? ELF::EM_SPARC32PLUS : ELF::EM_SPARC), /*HasRelocationAddend*/ true) {} ~SparcELFObjectWriter() override = default; protected: unsigned getRelocType(MCContext &Ctx, const MCValue &Target, const MCFixup &Fixup, bool IsPCRel) const override; bool needsRelocateWithSymbol(const MCValue &Val, const MCSymbol &Sym, unsigned Type) const override; }; } unsigned SparcELFObjectWriter::getRelocType(MCContext &Ctx, const MCValue &Target, const MCFixup &Fixup, bool IsPCRel) const { MCFixupKind Kind = Fixup.getKind(); if (Kind >= FirstLiteralRelocationKind) return Kind - FirstLiteralRelocationKind; if (const SparcMCExpr *SExpr = dyn_cast(Fixup.getValue())) { if (SExpr->getKind() == SparcMCExpr::VK_Sparc_R_DISP32) return ELF::R_SPARC_DISP32; } if (IsPCRel) { switch(Fixup.getTargetKind()) { default: llvm_unreachable("Unimplemented fixup -> relocation"); case FK_Data_1: return ELF::R_SPARC_DISP8; case FK_Data_2: return ELF::R_SPARC_DISP16; case FK_Data_4: return ELF::R_SPARC_DISP32; case FK_Data_8: return ELF::R_SPARC_DISP64; case Sparc::fixup_sparc_call30: return ELF::R_SPARC_WDISP30; case Sparc::fixup_sparc_br22: return ELF::R_SPARC_WDISP22; case Sparc::fixup_sparc_br19: return ELF::R_SPARC_WDISP19; case Sparc::fixup_sparc_br16: return ELF::R_SPARC_WDISP16; case Sparc::fixup_sparc_pc22: return ELF::R_SPARC_PC22; case Sparc::fixup_sparc_pc10: return ELF::R_SPARC_PC10; case Sparc::fixup_sparc_wplt30: return ELF::R_SPARC_WPLT30; } } switch(Fixup.getTargetKind()) { default: llvm_unreachable("Unimplemented fixup -> relocation"); case FK_NONE: return ELF::R_SPARC_NONE; case FK_Data_1: return ELF::R_SPARC_8; case FK_Data_2: return ((Fixup.getOffset() % 2) ? ELF::R_SPARC_UA16 : ELF::R_SPARC_16); case FK_Data_4: return ((Fixup.getOffset() % 4) ? ELF::R_SPARC_UA32 : ELF::R_SPARC_32); case FK_Data_8: return ((Fixup.getOffset() % 8) ? ELF::R_SPARC_UA64 : ELF::R_SPARC_64); case Sparc::fixup_sparc_13: return ELF::R_SPARC_13; case Sparc::fixup_sparc_hi22: return ELF::R_SPARC_HI22; case Sparc::fixup_sparc_lo10: return ELF::R_SPARC_LO10; case Sparc::fixup_sparc_h44: return ELF::R_SPARC_H44; case Sparc::fixup_sparc_m44: return ELF::R_SPARC_M44; case Sparc::fixup_sparc_l44: return ELF::R_SPARC_L44; case Sparc::fixup_sparc_hh: return ELF::R_SPARC_HH22; case Sparc::fixup_sparc_hm: return ELF::R_SPARC_HM10; case Sparc::fixup_sparc_lm: return ELF::R_SPARC_LM22; case Sparc::fixup_sparc_got22: return ELF::R_SPARC_GOT22; case Sparc::fixup_sparc_got10: return ELF::R_SPARC_GOT10; case Sparc::fixup_sparc_got13: return ELF::R_SPARC_GOT13; case Sparc::fixup_sparc_tls_gd_hi22: return ELF::R_SPARC_TLS_GD_HI22; case Sparc::fixup_sparc_tls_gd_lo10: return ELF::R_SPARC_TLS_GD_LO10; case Sparc::fixup_sparc_tls_gd_add: return ELF::R_SPARC_TLS_GD_ADD; case Sparc::fixup_sparc_tls_gd_call: return ELF::R_SPARC_TLS_GD_CALL; case Sparc::fixup_sparc_tls_ldm_hi22: return ELF::R_SPARC_TLS_LDM_HI22; case Sparc::fixup_sparc_tls_ldm_lo10: return ELF::R_SPARC_TLS_LDM_LO10; case Sparc::fixup_sparc_tls_ldm_add: return ELF::R_SPARC_TLS_LDM_ADD; case Sparc::fixup_sparc_tls_ldm_call: return ELF::R_SPARC_TLS_LDM_CALL; case Sparc::fixup_sparc_tls_ldo_hix22: return ELF::R_SPARC_TLS_LDO_HIX22; case Sparc::fixup_sparc_tls_ldo_lox10: return ELF::R_SPARC_TLS_LDO_LOX10; case Sparc::fixup_sparc_tls_ldo_add: return ELF::R_SPARC_TLS_LDO_ADD; case Sparc::fixup_sparc_tls_ie_hi22: return ELF::R_SPARC_TLS_IE_HI22; case Sparc::fixup_sparc_tls_ie_lo10: return ELF::R_SPARC_TLS_IE_LO10; case Sparc::fixup_sparc_tls_ie_ld: return ELF::R_SPARC_TLS_IE_LD; case Sparc::fixup_sparc_tls_ie_ldx: return ELF::R_SPARC_TLS_IE_LDX; case Sparc::fixup_sparc_tls_ie_add: return ELF::R_SPARC_TLS_IE_ADD; case Sparc::fixup_sparc_tls_le_hix22: return ELF::R_SPARC_TLS_LE_HIX22; case Sparc::fixup_sparc_tls_le_lox10: return ELF::R_SPARC_TLS_LE_LOX10; case Sparc::fixup_sparc_hix22: return ELF::R_SPARC_HIX22; case Sparc::fixup_sparc_lox10: return ELF::R_SPARC_LOX10; case Sparc::fixup_sparc_gotdata_hix22: return ELF::R_SPARC_GOTDATA_HIX22; case Sparc::fixup_sparc_gotdata_lox10: return ELF::R_SPARC_GOTDATA_LOX10; case Sparc::fixup_sparc_gotdata_op: return ELF::R_SPARC_GOTDATA_OP; } return ELF::R_SPARC_NONE; } bool SparcELFObjectWriter::needsRelocateWithSymbol(const MCValue &, const MCSymbol &, unsigned Type) const { switch (Type) { default: return false; // All relocations that use a GOT need a symbol, not an offset, as // the offset of the symbol within the section is irrelevant to // where the GOT entry is. Don't need to list all the TLS entries, // as they're all marked as requiring a symbol anyways. case ELF::R_SPARC_GOT10: case ELF::R_SPARC_GOT13: case ELF::R_SPARC_GOT22: case ELF::R_SPARC_GOTDATA_HIX22: case ELF::R_SPARC_GOTDATA_LOX10: case ELF::R_SPARC_GOTDATA_OP_HIX22: case ELF::R_SPARC_GOTDATA_OP_LOX10: return true; } } std::unique_ptr llvm::createSparcELFObjectWriter(bool Is64Bit, bool HasV9, uint8_t OSABI) { return std::make_unique(Is64Bit, HasV9, OSABI); }