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/SparcFixupKinds.h" 11 #include "MCTargetDesc/SparcMCExpr.h" 12 #include "MCTargetDesc/SparcMCTargetDesc.h" 13 #include "llvm/ADT/STLExtras.h" 14 #include "llvm/MC/MCELFObjectWriter.h" 15 #include "llvm/MC/MCExpr.h" 16 #include "llvm/MC/MCValue.h" 17 #include "llvm/Support/ErrorHandling.h" 18 19 using namespace llvm; 20 21 namespace { 22 class SparcELFObjectWriter : public MCELFObjectTargetWriter { 23 public: 24 SparcELFObjectWriter(bool Is64Bit, uint8_t OSABI) 25 : MCELFObjectTargetWriter(Is64Bit, OSABI, 26 Is64Bit ? ELF::EM_SPARCV9 : ELF::EM_SPARC, 27 /*HasRelocationAddend*/ true) {} 28 29 ~SparcELFObjectWriter() override {} 30 31 protected: 32 unsigned getRelocType(MCContext &Ctx, const MCValue &Target, 33 const MCFixup &Fixup, bool IsPCRel) const override; 34 35 bool needsRelocateWithSymbol(const MCSymbol &Sym, 36 unsigned Type) const override; 37 38 }; 39 } 40 41 unsigned SparcELFObjectWriter::getRelocType(MCContext &Ctx, 42 const MCValue &Target, 43 const MCFixup &Fixup, 44 bool IsPCRel) const { 45 46 if (const SparcMCExpr *SExpr = dyn_cast<SparcMCExpr>(Fixup.getValue())) { 47 if (SExpr->getKind() == SparcMCExpr::VK_Sparc_R_DISP32) 48 return ELF::R_SPARC_DISP32; 49 } 50 51 if (IsPCRel) { 52 switch((unsigned)Fixup.getKind()) { 53 default: 54 llvm_unreachable("Unimplemented fixup -> relocation"); 55 case FK_Data_1: return ELF::R_SPARC_DISP8; 56 case FK_Data_2: return ELF::R_SPARC_DISP16; 57 case FK_Data_4: return ELF::R_SPARC_DISP32; 58 case FK_Data_8: return ELF::R_SPARC_DISP64; 59 case Sparc::fixup_sparc_call30: return ELF::R_SPARC_WDISP30; 60 case Sparc::fixup_sparc_br22: return ELF::R_SPARC_WDISP22; 61 case Sparc::fixup_sparc_br19: return ELF::R_SPARC_WDISP19; 62 case Sparc::fixup_sparc_pc22: return ELF::R_SPARC_PC22; 63 case Sparc::fixup_sparc_pc10: return ELF::R_SPARC_PC10; 64 case Sparc::fixup_sparc_wplt30: return ELF::R_SPARC_WPLT30; 65 } 66 } 67 68 switch((unsigned)Fixup.getKind()) { 69 default: 70 llvm_unreachable("Unimplemented fixup -> relocation"); 71 case FK_Data_1: return ELF::R_SPARC_8; 72 case FK_Data_2: return ((Fixup.getOffset() % 2) 73 ? ELF::R_SPARC_UA16 74 : ELF::R_SPARC_16); 75 case FK_Data_4: return ((Fixup.getOffset() % 4) 76 ? ELF::R_SPARC_UA32 77 : ELF::R_SPARC_32); 78 case FK_Data_8: return ((Fixup.getOffset() % 8) 79 ? ELF::R_SPARC_UA64 80 : ELF::R_SPARC_64); 81 case Sparc::fixup_sparc_hi22: return ELF::R_SPARC_HI22; 82 case Sparc::fixup_sparc_lo10: return ELF::R_SPARC_LO10; 83 case Sparc::fixup_sparc_h44: return ELF::R_SPARC_H44; 84 case Sparc::fixup_sparc_m44: return ELF::R_SPARC_M44; 85 case Sparc::fixup_sparc_l44: return ELF::R_SPARC_L44; 86 case Sparc::fixup_sparc_hh: return ELF::R_SPARC_HH22; 87 case Sparc::fixup_sparc_hm: return ELF::R_SPARC_HM10; 88 case Sparc::fixup_sparc_got22: return ELF::R_SPARC_GOT22; 89 case Sparc::fixup_sparc_got10: return ELF::R_SPARC_GOT10; 90 case Sparc::fixup_sparc_tls_gd_hi22: return ELF::R_SPARC_TLS_GD_HI22; 91 case Sparc::fixup_sparc_tls_gd_lo10: return ELF::R_SPARC_TLS_GD_LO10; 92 case Sparc::fixup_sparc_tls_gd_add: return ELF::R_SPARC_TLS_GD_ADD; 93 case Sparc::fixup_sparc_tls_gd_call: return ELF::R_SPARC_TLS_GD_CALL; 94 case Sparc::fixup_sparc_tls_ldm_hi22: return ELF::R_SPARC_TLS_LDM_HI22; 95 case Sparc::fixup_sparc_tls_ldm_lo10: return ELF::R_SPARC_TLS_LDM_LO10; 96 case Sparc::fixup_sparc_tls_ldm_add: return ELF::R_SPARC_TLS_LDM_ADD; 97 case Sparc::fixup_sparc_tls_ldm_call: return ELF::R_SPARC_TLS_LDM_CALL; 98 case Sparc::fixup_sparc_tls_ldo_hix22: return ELF::R_SPARC_TLS_LDO_HIX22; 99 case Sparc::fixup_sparc_tls_ldo_lox10: return ELF::R_SPARC_TLS_LDO_LOX10; 100 case Sparc::fixup_sparc_tls_ldo_add: return ELF::R_SPARC_TLS_LDO_ADD; 101 case Sparc::fixup_sparc_tls_ie_hi22: return ELF::R_SPARC_TLS_IE_HI22; 102 case Sparc::fixup_sparc_tls_ie_lo10: return ELF::R_SPARC_TLS_IE_LO10; 103 case Sparc::fixup_sparc_tls_ie_ld: return ELF::R_SPARC_TLS_IE_LD; 104 case Sparc::fixup_sparc_tls_ie_ldx: return ELF::R_SPARC_TLS_IE_LDX; 105 case Sparc::fixup_sparc_tls_ie_add: return ELF::R_SPARC_TLS_IE_ADD; 106 case Sparc::fixup_sparc_tls_le_hix22: return ELF::R_SPARC_TLS_LE_HIX22; 107 case Sparc::fixup_sparc_tls_le_lox10: return ELF::R_SPARC_TLS_LE_LOX10; 108 } 109 110 return ELF::R_SPARC_NONE; 111 } 112 113 bool SparcELFObjectWriter::needsRelocateWithSymbol(const MCSymbol &Sym, 114 unsigned Type) const { 115 switch (Type) { 116 default: 117 return false; 118 119 // All relocations that use a GOT need a symbol, not an offset, as 120 // the offset of the symbol within the section is irrelevant to 121 // where the GOT entry is. Don't need to list all the TLS entries, 122 // as they're all marked as requiring a symbol anyways. 123 case ELF::R_SPARC_GOT10: 124 case ELF::R_SPARC_GOT13: 125 case ELF::R_SPARC_GOT22: 126 case ELF::R_SPARC_GOTDATA_HIX22: 127 case ELF::R_SPARC_GOTDATA_LOX10: 128 case ELF::R_SPARC_GOTDATA_OP_HIX22: 129 case ELF::R_SPARC_GOTDATA_OP_LOX10: 130 return true; 131 } 132 } 133 134 MCObjectWriter *llvm::createSparcELFObjectWriter(raw_pwrite_stream &OS, 135 bool Is64Bit, 136 bool IsLittleEndian, 137 uint8_t OSABI) { 138 MCELFObjectTargetWriter *MOTW = new SparcELFObjectWriter(Is64Bit, OSABI); 139 return createELFObjectWriter(MOTW, OS, IsLittleEndian); 140 } 141
