| //===-- 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, uint8_t OSABI) |
| : MCELFObjectTargetWriter(Is64Bit, OSABI, |
| Is64Bit ? ELF::EM_SPARCV9 : ELF::EM_SPARC, |
| /*HasRelocationAddend*/ true) {} |
| |
| ~SparcELFObjectWriter() override {} |
| |
| protected: |
| unsigned getRelocType(MCContext &Ctx, const MCValue &Target, |
| const MCFixup &Fixup, bool IsPCRel) const override; |
| |
| bool needsRelocateWithSymbol(const MCSymbol &Sym, |
| unsigned Type) const override; |
| |
| }; |
| } |
| |
| unsigned SparcELFObjectWriter::getRelocType(MCContext &Ctx, |
| const MCValue &Target, |
| const MCFixup &Fixup, |
| bool IsPCRel) const { |
| |
| if (const SparcMCExpr *SExpr = dyn_cast<SparcMCExpr>(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_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_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; |
| } |
| |
| return ELF::R_SPARC_NONE; |
| } |
| |
| bool SparcELFObjectWriter::needsRelocateWithSymbol(const MCSymbol &Sym, |
| 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<MCObjectTargetWriter> |
| llvm::createSparcELFObjectWriter(bool Is64Bit, uint8_t OSABI) { |
| return std::make_unique<SparcELFObjectWriter>(Is64Bit, OSABI); |
| } |
