diff options
Diffstat (limited to 'contrib/llvm-project/llvm/lib/Target/Sparc/MCTargetDesc/SparcELFObjectWriter.cpp')
| -rw-r--r-- | contrib/llvm-project/llvm/lib/Target/Sparc/MCTargetDesc/SparcELFObjectWriter.cpp | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/Target/Sparc/MCTargetDesc/SparcELFObjectWriter.cpp b/contrib/llvm-project/llvm/lib/Target/Sparc/MCTargetDesc/SparcELFObjectWriter.cpp new file mode 100644 index 000000000000..c97a30e634cc --- /dev/null +++ b/contrib/llvm-project/llvm/lib/Target/Sparc/MCTargetDesc/SparcELFObjectWriter.cpp @@ -0,0 +1,139 @@ +//===-- 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_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); +} |