| Venkatraman Govindaraju | b73aeca | 2014-01-06 01:22:54 +0000 | [diff] [blame^] | 1 | //===-- SparcELFObjectWriter.cpp - Sparc ELF Writer -----------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #include "MCTargetDesc/SparcMCTargetDesc.h" |
| 11 | #include "MCTargetDesc/SparcFixupKinds.h" |
| 12 | #include "llvm/ADT/STLExtras.h" |
| 13 | #include "llvm/MC/MCELFObjectWriter.h" |
| 14 | #include "llvm/MC/MCExpr.h" |
| 15 | #include "llvm/MC/MCValue.h" |
| 16 | #include "llvm/Support/ErrorHandling.h" |
| 17 | |
| 18 | using namespace llvm; |
| 19 | |
| 20 | namespace { |
| 21 | class SparcELFObjectWriter : public MCELFObjectTargetWriter { |
| 22 | public: |
| 23 | SparcELFObjectWriter(bool Is64Bit, uint8_t OSABI) |
| 24 | : MCELFObjectTargetWriter(Is64Bit, OSABI, |
| 25 | Is64Bit ? ELF::EM_SPARCV9 : ELF::EM_SPARC, |
| 26 | /*HasRelocationAddend*/ true) {} |
| 27 | |
| 28 | virtual ~SparcELFObjectWriter() {} |
| 29 | protected: |
| 30 | virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup, |
| 31 | bool IsPCRel, bool IsRelocWithSymbol, |
| 32 | int64_t Addend) const; |
| 33 | |
| 34 | }; |
| 35 | } |
| 36 | |
| 37 | |
| 38 | unsigned SparcELFObjectWriter::GetRelocType(const MCValue &Target, |
| 39 | const MCFixup &Fixup, |
| 40 | bool IsPCRel, |
| 41 | bool IsRelocWithSymbol, |
| 42 | int64_t Addend) const { |
| 43 | if (IsPCRel) { |
| 44 | switch((unsigned)Fixup.getKind()) { |
| 45 | default: |
| 46 | llvm_unreachable("Unimplemented fixup -> relocation"); |
| 47 | case FK_Data_1: return ELF::R_SPARC_DISP8; |
| 48 | case FK_Data_2: return ELF::R_SPARC_DISP16; |
| 49 | case FK_Data_4: return ELF::R_SPARC_DISP32; |
| 50 | case FK_Data_8: return ELF::R_SPARC_DISP64; |
| 51 | case Sparc::fixup_sparc_call30: return ELF::R_SPARC_WDISP30; |
| 52 | case Sparc::fixup_sparc_br22: return ELF::R_SPARC_WDISP22; |
| 53 | case Sparc::fixup_sparc_br19: return ELF::R_SPARC_WDISP19; |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | switch((unsigned)Fixup.getKind()) { |
| 58 | default: |
| 59 | llvm_unreachable("Unimplemented fixup -> relocation"); |
| 60 | case FK_Data_1: return ELF::R_SPARC_8; |
| 61 | case FK_Data_2: return ((Fixup.getOffset() % 2) |
| 62 | ? ELF::R_SPARC_UA16 |
| 63 | : ELF::R_SPARC_16); |
| 64 | case FK_Data_4: return ((Fixup.getOffset() % 4) |
| 65 | ? ELF::R_SPARC_UA32 |
| 66 | : ELF::R_SPARC_32); |
| 67 | case FK_Data_8: return ((Fixup.getOffset() % 8) |
| 68 | ? ELF::R_SPARC_UA64 |
| 69 | : ELF::R_SPARC_64); |
| 70 | case Sparc::fixup_sparc_hi22: return ELF::R_SPARC_HI22; |
| 71 | case Sparc::fixup_sparc_lo10: return ELF::R_SPARC_LO10; |
| 72 | case Sparc::fixup_sparc_h44: return ELF::R_SPARC_H44; |
| 73 | case Sparc::fixup_sparc_m44: return ELF::R_SPARC_M44; |
| 74 | case Sparc::fixup_sparc_l44: return ELF::R_SPARC_L44; |
| 75 | case Sparc::fixup_sparc_hh: return ELF::R_SPARC_HH22; |
| 76 | case Sparc::fixup_sparc_hm: return ELF::R_SPARC_HM10; |
| 77 | } |
| 78 | return ELF::R_SPARC_NONE; |
| 79 | } |
| 80 | |
| 81 | MCObjectWriter *llvm::createSparcELFObjectWriter(raw_ostream &OS, |
| 82 | bool Is64Bit, |
| 83 | uint8_t OSABI) { |
| 84 | MCELFObjectTargetWriter *MOTW = new SparcELFObjectWriter(Is64Bit, OSABI); |
| 85 | return createELFObjectWriter(MOTW, OS, /*IsLittleEndian=*/false); |
| 86 | } |