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