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, uint32_t Type, uint64_t Val) const override; 26 RelExpr getRelExpr(uint32_t Type, const SymbolBody &S, 27 const uint8_t *Loc) const override; 28 }; 29 } // namespace 30 31 void PPC::relocateOne(uint8_t *Loc, uint32_t Type, uint64_t Val) const { 32 switch (Type) { 33 case R_PPC_ADDR16_HA: 34 write16be(Loc, (Val + 0x8000) >> 16); 35 break; 36 case R_PPC_ADDR16_LO: 37 write16be(Loc, Val); 38 break; 39 case R_PPC_ADDR32: 40 case R_PPC_REL32: 41 write32be(Loc, Val); 42 break; 43 case R_PPC_REL24: 44 write32be(Loc, read32be(Loc) | (Val & 0x3FFFFFC)); 45 break; 46 default: 47 error(getErrorLocation(Loc) + "unrecognized reloc " + Twine(Type)); 48 } 49 } 50 51 RelExpr PPC::getRelExpr(uint32_t Type, const SymbolBody &S, 52 const uint8_t *Loc) const { 53 switch (Type) { 54 case R_PPC_REL24: 55 case R_PPC_REL32: 56 return R_PC; 57 default: 58 return R_ABS; 59 } 60 } 61 62 TargetInfo *elf::getPPCTargetInfo() { 63 static PPC Target; 64 return &Target; 65 } 66