diff options
Diffstat (limited to 'lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp')
| -rw-r--r-- | lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp | 52 |
1 files changed, 32 insertions, 20 deletions
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp index db6da8c..75bb586 100644 --- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp +++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp @@ -55,7 +55,7 @@ public: const MemoryBuffer& getBuffer() const { return *InputData; } - // Methods for type inquiry through isa, cast, and dyn_cast + // Methods for type inquiry through isa, cast and dyn_cast static inline bool classof(const Binary *v) { return (isa<ELFObjectFile<target_endianness, is64Bits> >(v) && classof(cast<ELFObjectFile<target_endianness, is64Bits> >(v))); @@ -208,10 +208,9 @@ void RuntimeDyldELF::resolveX86_64Relocation(uint8_t *LocalAddress, case ELF::R_X86_64_32: case ELF::R_X86_64_32S: { Value += Addend; - // FIXME: Handle the possibility of this assertion failing - assert((Type == ELF::R_X86_64_32 && !(Value & 0xFFFFFFFF00000000ULL)) || - (Type == ELF::R_X86_64_32S && - (Value & 0xFFFFFFFF00000000ULL) == 0xFFFFFFFF00000000ULL)); + assert((Type == ELF::R_X86_64_32 && (Value <= UINT32_MAX)) || + (Type == ELF::R_X86_64_32S && + ((int64_t)Value <= INT32_MAX && (int64_t)Value >= INT32_MIN))); uint32_t TruncatedAddr = (Value & 0xFFFFFFFF); uint32_t *Target = reinterpret_cast<uint32_t*>(LocalAddress); *Target = TruncatedAddr; @@ -220,7 +219,7 @@ void RuntimeDyldELF::resolveX86_64Relocation(uint8_t *LocalAddress, case ELF::R_X86_64_PC32: { uint32_t *Placeholder = reinterpret_cast<uint32_t*>(LocalAddress); int64_t RealOffset = *Placeholder + Value + Addend - FinalAddress; - assert(RealOffset <= 214783647 && RealOffset >= -214783648); + assert(RealOffset <= INT32_MAX && RealOffset >= INT32_MIN); int32_t TruncOffset = (RealOffset & 0xFFFFFFFF); *Placeholder = TruncOffset; break; @@ -248,7 +247,7 @@ void RuntimeDyldELF::resolveX86Relocation(uint8_t *LocalAddress, } default: // There are other relocation types, but it appears these are the - // only ones currently used by the LLVM ELF object writer + // only ones currently used by the LLVM ELF object writer llvm_unreachable("Relocation type not implemented yet!"); break; } @@ -334,28 +333,31 @@ void RuntimeDyldELF::resolveRelocation(uint8_t *LocalAddress, void RuntimeDyldELF::processRelocationRef(const ObjRelocationInfo &Rel, ObjectImage &Obj, ObjSectionToIDMap &ObjSectionToID, - LocalSymbolMap &Symbols, + const SymbolTableMap &Symbols, StubMap &Stubs) { uint32_t RelType = (uint32_t)(Rel.Type & 0xffffffffL); intptr_t Addend = (intptr_t)Rel.AdditionalInfo; - RelocationValueRef Value; - StringRef TargetName; const SymbolRef &Symbol = Rel.Symbol; + + // Obtain the symbol name which is referenced in the relocation + StringRef TargetName; Symbol.getName(TargetName); DEBUG(dbgs() << "\t\tRelType: " << RelType << " Addend: " << Addend << " TargetName: " << TargetName << "\n"); - // First look the symbol in object file symbols. - LocalSymbolMap::iterator lsi = Symbols.find(TargetName.data()); + RelocationValueRef Value; + // First search for the symbol in the local symbol table + SymbolTableMap::const_iterator lsi = Symbols.find(TargetName.data()); if (lsi != Symbols.end()) { Value.SectionID = lsi->second.first; Value.Addend = lsi->second.second; } else { - // Second look the symbol in global symbol table. - StringMap<SymbolLoc>::iterator gsi = SymbolTable.find(TargetName.data()); - if (gsi != SymbolTable.end()) { + // Search for the symbol in the global symbol table + SymbolTableMap::const_iterator gsi = + GlobalSymbolTable.find(TargetName.data()); + if (gsi != GlobalSymbolTable.end()) { Value.SectionID = gsi->second.first; Value.Addend = gsi->second.second; } else { @@ -366,7 +368,7 @@ void RuntimeDyldELF::processRelocationRef(const ObjRelocationInfo &Rel, // TODO: Now ELF SymbolRef::ST_Debug = STT_SECTION, it's not obviously // and can be changed by another developers. Maybe best way is add // a new symbol type ST_Section to SymbolRef and use it. - section_iterator si = Obj.end_sections(); + section_iterator si(Obj.end_sections()); Symbol.getSection(si); if (si == Obj.end_sections()) llvm_unreachable("Symbol section not found, bad object file format!"); @@ -410,14 +412,24 @@ void RuntimeDyldELF::processRelocationRef(const ObjRelocationInfo &Rel, Stubs[Value] = Section.StubOffset; uint8_t *StubTargetAddr = createStubFunction(Section.Address + Section.StubOffset); - AddRelocation(Value, Rel.SectionID, - StubTargetAddr - Section.Address, ELF::R_ARM_ABS32); + RelocationEntry RE(Rel.SectionID, StubTargetAddr - Section.Address, + ELF::R_ARM_ABS32, Value.Addend); + if (Value.SymbolName) + addRelocationForSymbol(RE, Value.SymbolName); + else + addRelocationForSection(RE, Value.SectionID); + resolveRelocation(Target, (uint64_t)Target, (uint64_t)Section.Address + Section.StubOffset, RelType, 0); Section.StubOffset += getMaxStubSize(); } - } else - AddRelocation(Value, Rel.SectionID, Rel.Offset, RelType); + } else { + RelocationEntry RE(Rel.SectionID, Rel.Offset, RelType, Value.Addend); + if (Value.SymbolName) + addRelocationForSymbol(RE, Value.SymbolName); + else + addRelocationForSection(RE, Value.SectionID); + } } bool RuntimeDyldELF::isCompatibleFormat(const MemoryBuffer *InputBuffer) const { |
