| //===-- PPCELFObjectWriter.cpp - PPC ELF Writer ---------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "MCTargetDesc/PPCFixupKinds.h" |
| #include "MCTargetDesc/PPCMCTargetDesc.h" |
| #include "llvm/MC/MCELFObjectWriter.h" |
| #include "llvm/Support/ErrorHandling.h" |
| |
| using namespace llvm; |
| |
| namespace { |
| class PPCELFObjectWriter : public MCELFObjectTargetWriter { |
| public: |
| PPCELFObjectWriter(bool Is64Bit, uint8_t OSABI); |
| |
| virtual ~PPCELFObjectWriter(); |
| protected: |
| virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup, |
| bool IsPCRel, bool IsRelocWithSymbol, |
| int64_t Addend) const; |
| virtual void adjustFixupOffset(const MCFixup &Fixup, uint64_t &RelocOffset); |
| }; |
| } |
| |
| PPCELFObjectWriter::PPCELFObjectWriter(bool Is64Bit, uint8_t OSABI) |
| : MCELFObjectTargetWriter(Is64Bit, OSABI, |
| Is64Bit ? ELF::EM_PPC64 : ELF::EM_PPC, |
| /*HasRelocationAddend*/ true) {} |
| |
| PPCELFObjectWriter::~PPCELFObjectWriter() { |
| } |
| |
| unsigned PPCELFObjectWriter::GetRelocType(const MCValue &Target, |
| const MCFixup &Fixup, |
| bool IsPCRel, |
| bool IsRelocWithSymbol, |
| int64_t Addend) const { |
| // determine the type of the relocation |
| unsigned Type; |
| if (IsPCRel) { |
| switch ((unsigned)Fixup.getKind()) { |
| default: |
| llvm_unreachable("Unimplemented"); |
| case PPC::fixup_ppc_br24: |
| Type = ELF::R_PPC_REL24; |
| break; |
| case FK_PCRel_4: |
| Type = ELF::R_PPC_REL32; |
| break; |
| } |
| } else { |
| switch ((unsigned)Fixup.getKind()) { |
| default: llvm_unreachable("invalid fixup kind!"); |
| case PPC::fixup_ppc_br24: |
| Type = ELF::R_PPC_ADDR24; |
| break; |
| case PPC::fixup_ppc_brcond14: |
| Type = ELF::R_PPC_ADDR14_BRTAKEN; // XXX: or BRNTAKEN?_ |
| break; |
| case PPC::fixup_ppc_ha16: |
| Type = ELF::R_PPC_ADDR16_HA; |
| break; |
| case PPC::fixup_ppc_lo16: |
| Type = ELF::R_PPC_ADDR16_LO; |
| break; |
| case PPC::fixup_ppc_lo14: |
| Type = ELF::R_PPC_ADDR14; |
| break; |
| case FK_Data_4: |
| Type = ELF::R_PPC_ADDR32; |
| break; |
| case FK_Data_2: |
| Type = ELF::R_PPC_ADDR16; |
| break; |
| } |
| } |
| return Type; |
| } |
| |
| void PPCELFObjectWriter:: |
| adjustFixupOffset(const MCFixup &Fixup, uint64_t &RelocOffset) { |
| switch ((unsigned)Fixup.getKind()) { |
| case PPC::fixup_ppc_ha16: |
| case PPC::fixup_ppc_lo16: |
| RelocOffset += 2; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| MCObjectWriter *llvm::createPPCELFObjectWriter(raw_ostream &OS, |
| bool Is64Bit, |
| uint8_t OSABI) { |
| MCELFObjectTargetWriter *MOTW = new PPCELFObjectWriter(Is64Bit, OSABI); |
| return createELFObjectWriter(MOTW, OS, /*IsLittleEndian=*/false); |
| } |