1 //===- PPC.cpp ------------------------------------------------------------===// 2 // 3 // The LLVM Linker 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 "Error.h" 11 #include "Symbols.h" 12 #include "Target.h" 13 #include "llvm/Support/Endian.h" 14 15 using namespace llvm; 16 using namespace llvm::support::endian; 17 using namespace llvm::ELF; 18 using namespace lld; 19 using namespace lld::elf; 20 21 namespace { 22 class PPC final : public TargetInfo { 23 public: 24 PPC() { GotBaseSymOff = 0x8000; } 25 void relocateOne(uint8_t *Loc, RelType Type, uint64_t Val) const override; 26 RelExpr getRelExpr(RelType Type, const SymbolBody &S, 27 const uint8_t *Loc) const override; 28 }; 29 } // namespace 30 31 RelExpr PPC::getRelExpr(RelType Type, const SymbolBody &S, 32 const uint8_t *Loc) const { 33 switch (Type) { 34 case R_PPC_REL24: 35 case R_PPC_REL32: 36 return R_PC; 37 default: 38 return R_ABS; 39 } 40 } 41 42 void PPC::relocateOne(uint8_t *Loc, RelType Type, uint64_t Val) const { 43 switch (Type) { 44 case R_PPC_ADDR16_HA: 45 write16be(Loc, (Val + 0x8000) >> 16); 46 break; 47 case R_PPC_ADDR16_HI: 48 write16be(Loc, Val >> 16); 49 break; 50 case R_PPC_ADDR16_LO: 51 write16be(Loc, Val); 52 break; 53 case R_PPC_ADDR32: 54 case R_PPC_REL32: 55 write32be(Loc, Val); 56 break; 57 case R_PPC_REL24: 58 write32be(Loc, read32be(Loc) | (Val & 0x3FFFFFC)); 59 break; 60 default: 61 error(getErrorLocation(Loc) + "unrecognized reloc " + Twine(Type)); 62 } 63 } 64 65 TargetInfo *elf::getPPCTargetInfo() { 66 static PPC Target; 67 return &Target; 68 } 69