| //===- COFFObjectFile.cpp - COFF object file implementation -----*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file declares the COFFObjectFile class. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Object/COFF.h" |
| #include "llvm/ADT/ArrayRef.h" |
| #include "llvm/ADT/SmallString.h" |
| #include "llvm/ADT/StringSwitch.h" |
| #include "llvm/ADT/Triple.h" |
| |
| using namespace llvm; |
| using namespace object; |
| |
| namespace { |
| using support::ulittle8_t; |
| using support::ulittle16_t; |
| using support::ulittle32_t; |
| using support::little16_t; |
| } |
| |
| namespace { |
| // Returns false if size is greater than the buffer size. And sets ec. |
| bool checkSize(const MemoryBuffer *m, error_code &ec, uint64_t size) { |
| if (m->getBufferSize() < size) { |
| ec = object_error::unexpected_eof; |
| return false; |
| } |
| return true; |
| } |
| |
| // Returns false if any bytes in [addr, addr + size) fall outsize of m. |
| bool checkAddr(const MemoryBuffer *m, |
| error_code &ec, |
| uintptr_t addr, |
| uint64_t size) { |
| if (addr + size < addr || |
| addr + size < size || |
| addr + size > uintptr_t(m->getBufferEnd())) { |
| ec = object_error::unexpected_eof; |
| return false; |
| } |
| return true; |
| } |
| } |
| |
| const coff_symbol *COFFObjectFile::toSymb(DataRefImpl Symb) const { |
| const coff_symbol *addr = reinterpret_cast<const coff_symbol*>(Symb.p); |
| |
| # ifndef NDEBUG |
| // Verify that the symbol points to a valid entry in the symbol table. |
| uintptr_t offset = uintptr_t(addr) - uintptr_t(base()); |
| if (offset < Header->PointerToSymbolTable |
| || offset >= Header->PointerToSymbolTable |
| + (Header->NumberOfSymbols * sizeof(coff_symbol))) |
| report_fatal_error("Symbol was outside of symbol table."); |
| |
| assert((offset - Header->PointerToSymbolTable) % sizeof(coff_symbol) |
| == 0 && "Symbol did not point to the beginning of a symbol"); |
| # endif |
| |
| return addr; |
| } |
| |
| const coff_section *COFFObjectFile::toSec(DataRefImpl Sec) const { |
| const coff_section *addr = reinterpret_cast<const coff_section*>(Sec.p); |
| |
| # ifndef NDEBUG |
| // Verify that the section points to a valid entry in the section table. |
| if (addr < SectionTable |
| || addr >= (SectionTable + Header->NumberOfSections)) |
| report_fatal_error("Section was outside of section table."); |
| |
| uintptr_t offset = uintptr_t(addr) - uintptr_t(SectionTable); |
| assert(offset % sizeof(coff_section) == 0 && |
| "Section did not point to the beginning of a section"); |
| # endif |
| |
| return addr; |
| } |
| |
| error_code COFFObjectFile::getSymbolNext(DataRefImpl Symb, |
| SymbolRef &Result) const { |
| const coff_symbol *symb = toSymb(Symb); |
| symb += 1 + symb->NumberOfAuxSymbols; |
| Symb.p = reinterpret_cast<uintptr_t>(symb); |
| Result = SymbolRef(Symb, this); |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::getSymbolName(DataRefImpl Symb, |
| StringRef &Result) const { |
| const coff_symbol *symb = toSymb(Symb); |
| return getSymbolName(symb, Result); |
| } |
| |
| error_code COFFObjectFile::getSymbolFileOffset(DataRefImpl Symb, |
| uint64_t &Result) const { |
| const coff_symbol *symb = toSymb(Symb); |
| const coff_section *Section = NULL; |
| if (error_code ec = getSection(symb->SectionNumber, Section)) |
| return ec; |
| char Type; |
| if (error_code ec = getSymbolNMTypeChar(Symb, Type)) |
| return ec; |
| if (Type == 'U' || Type == 'w') |
| Result = UnknownAddressOrSize; |
| else if (Section) |
| Result = Section->PointerToRawData + symb->Value; |
| else |
| Result = symb->Value; |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::getSymbolAddress(DataRefImpl Symb, |
| uint64_t &Result) const { |
| const coff_symbol *symb = toSymb(Symb); |
| const coff_section *Section = NULL; |
| if (error_code ec = getSection(symb->SectionNumber, Section)) |
| return ec; |
| char Type; |
| if (error_code ec = getSymbolNMTypeChar(Symb, Type)) |
| return ec; |
| if (Type == 'U' || Type == 'w') |
| Result = UnknownAddressOrSize; |
| else if (Section) |
| Result = Section->VirtualAddress + symb->Value; |
| else |
| Result = symb->Value; |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::getSymbolType(DataRefImpl Symb, |
| SymbolRef::Type &Result) const { |
| const coff_symbol *symb = toSymb(Symb); |
| Result = SymbolRef::ST_Other; |
| if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL && |
| symb->SectionNumber == COFF::IMAGE_SYM_UNDEFINED) { |
| Result = SymbolRef::ST_Unknown; |
| } else { |
| if (symb->getComplexType() == COFF::IMAGE_SYM_DTYPE_FUNCTION) { |
| Result = SymbolRef::ST_Function; |
| } else { |
| char Type; |
| if (error_code ec = getSymbolNMTypeChar(Symb, Type)) |
| return ec; |
| if (Type == 'r' || Type == 'R') { |
| Result = SymbolRef::ST_Data; |
| } |
| } |
| } |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::getSymbolFlags(DataRefImpl Symb, |
| uint32_t &Result) const { |
| const coff_symbol *symb = toSymb(Symb); |
| Result = SymbolRef::SF_None; |
| |
| // TODO: Correctly set SF_FormatSpecific, SF_ThreadLocal, SF_Common |
| |
| if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL && |
| symb->SectionNumber == COFF::IMAGE_SYM_UNDEFINED) |
| Result |= SymbolRef::SF_Undefined; |
| |
| // TODO: This are certainly too restrictive. |
| if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL) |
| Result |= SymbolRef::SF_Global; |
| |
| if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL) |
| Result |= SymbolRef::SF_Weak; |
| |
| if (symb->SectionNumber == COFF::IMAGE_SYM_ABSOLUTE) |
| Result |= SymbolRef::SF_Absolute; |
| |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::getSymbolSize(DataRefImpl Symb, |
| uint64_t &Result) const { |
| // FIXME: Return the correct size. This requires looking at all the symbols |
| // in the same section as this symbol, and looking for either the next |
| // symbol, or the end of the section. |
| const coff_symbol *symb = toSymb(Symb); |
| const coff_section *Section = NULL; |
| if (error_code ec = getSection(symb->SectionNumber, Section)) |
| return ec; |
| char Type; |
| if (error_code ec = getSymbolNMTypeChar(Symb, Type)) |
| return ec; |
| if (Type == 'U' || Type == 'w') |
| Result = UnknownAddressOrSize; |
| else if (Section) |
| Result = Section->SizeOfRawData - symb->Value; |
| else |
| Result = 0; |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::getSymbolNMTypeChar(DataRefImpl Symb, |
| char &Result) const { |
| const coff_symbol *symb = toSymb(Symb); |
| StringRef name; |
| if (error_code ec = getSymbolName(Symb, name)) |
| return ec; |
| char ret = StringSwitch<char>(name) |
| .StartsWith(".debug", 'N') |
| .StartsWith(".sxdata", 'N') |
| .Default('?'); |
| |
| if (ret != '?') { |
| Result = ret; |
| return object_error::success; |
| } |
| |
| uint32_t Characteristics = 0; |
| if (symb->SectionNumber > 0) { |
| const coff_section *Section = NULL; |
| if (error_code ec = getSection(symb->SectionNumber, Section)) |
| return ec; |
| Characteristics = Section->Characteristics; |
| } |
| |
| switch (symb->SectionNumber) { |
| case COFF::IMAGE_SYM_UNDEFINED: |
| // Check storage classes. |
| if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL) { |
| Result = 'w'; |
| return object_error::success; // Don't do ::toupper. |
| } else if (symb->Value != 0) // Check for common symbols. |
| ret = 'c'; |
| else |
| ret = 'u'; |
| break; |
| case COFF::IMAGE_SYM_ABSOLUTE: |
| ret = 'a'; |
| break; |
| case COFF::IMAGE_SYM_DEBUG: |
| ret = 'n'; |
| break; |
| default: |
| // Check section type. |
| if (Characteristics & COFF::IMAGE_SCN_CNT_CODE) |
| ret = 't'; |
| else if ( Characteristics & COFF::IMAGE_SCN_MEM_READ |
| && ~Characteristics & COFF::IMAGE_SCN_MEM_WRITE) // Read only. |
| ret = 'r'; |
| else if (Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA) |
| ret = 'd'; |
| else if (Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA) |
| ret = 'b'; |
| else if (Characteristics & COFF::IMAGE_SCN_LNK_INFO) |
| ret = 'i'; |
| |
| // Check for section symbol. |
| else if ( symb->StorageClass == COFF::IMAGE_SYM_CLASS_STATIC |
| && symb->Value == 0) |
| ret = 's'; |
| } |
| |
| if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL) |
| ret = ::toupper(ret); |
| |
| Result = ret; |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::getSymbolSection(DataRefImpl Symb, |
| section_iterator &Result) const { |
| const coff_symbol *symb = toSymb(Symb); |
| if (symb->SectionNumber <= COFF::IMAGE_SYM_UNDEFINED) |
| Result = end_sections(); |
| else { |
| const coff_section *sec = 0; |
| if (error_code ec = getSection(symb->SectionNumber, sec)) return ec; |
| DataRefImpl Sec; |
| Sec.p = reinterpret_cast<uintptr_t>(sec); |
| Result = section_iterator(SectionRef(Sec, this)); |
| } |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::getSymbolValue(DataRefImpl Symb, |
| uint64_t &Val) const { |
| report_fatal_error("getSymbolValue unimplemented in COFFObjectFile"); |
| } |
| |
| error_code COFFObjectFile::getSectionNext(DataRefImpl Sec, |
| SectionRef &Result) const { |
| const coff_section *sec = toSec(Sec); |
| sec += 1; |
| Sec.p = reinterpret_cast<uintptr_t>(sec); |
| Result = SectionRef(Sec, this); |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::getSectionName(DataRefImpl Sec, |
| StringRef &Result) const { |
| const coff_section *sec = toSec(Sec); |
| return getSectionName(sec, Result); |
| } |
| |
| error_code COFFObjectFile::getSectionAddress(DataRefImpl Sec, |
| uint64_t &Result) const { |
| const coff_section *sec = toSec(Sec); |
| Result = sec->VirtualAddress; |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::getSectionSize(DataRefImpl Sec, |
| uint64_t &Result) const { |
| const coff_section *sec = toSec(Sec); |
| Result = sec->SizeOfRawData; |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::getSectionContents(DataRefImpl Sec, |
| StringRef &Result) const { |
| const coff_section *sec = toSec(Sec); |
| ArrayRef<uint8_t> Res; |
| error_code EC = getSectionContents(sec, Res); |
| Result = StringRef(reinterpret_cast<const char*>(Res.data()), Res.size()); |
| return EC; |
| } |
| |
| error_code COFFObjectFile::getSectionAlignment(DataRefImpl Sec, |
| uint64_t &Res) const { |
| const coff_section *sec = toSec(Sec); |
| if (!sec) |
| return object_error::parse_failed; |
| Res = uint64_t(1) << (((sec->Characteristics & 0x00F00000) >> 20) - 1); |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::isSectionText(DataRefImpl Sec, |
| bool &Result) const { |
| const coff_section *sec = toSec(Sec); |
| Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_CODE; |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::isSectionData(DataRefImpl Sec, |
| bool &Result) const { |
| const coff_section *sec = toSec(Sec); |
| Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA; |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::isSectionBSS(DataRefImpl Sec, |
| bool &Result) const { |
| const coff_section *sec = toSec(Sec); |
| Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA; |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::isSectionRequiredForExecution(DataRefImpl Sec, |
| bool &Result) const { |
| // FIXME: Unimplemented |
| Result = true; |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::isSectionVirtual(DataRefImpl Sec, |
| bool &Result) const { |
| const coff_section *sec = toSec(Sec); |
| Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA; |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::isSectionZeroInit(DataRefImpl Sec, |
| bool &Result) const { |
| // FIXME: Unimplemented. |
| Result = false; |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::isSectionReadOnlyData(DataRefImpl Sec, |
| bool &Result) const { |
| // FIXME: Unimplemented. |
| Result = false; |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::sectionContainsSymbol(DataRefImpl Sec, |
| DataRefImpl Symb, |
| bool &Result) const { |
| const coff_section *sec = toSec(Sec); |
| const coff_symbol *symb = toSymb(Symb); |
| const coff_section *symb_sec = 0; |
| if (error_code ec = getSection(symb->SectionNumber, symb_sec)) return ec; |
| if (symb_sec == sec) |
| Result = true; |
| else |
| Result = false; |
| return object_error::success; |
| } |
| |
| relocation_iterator COFFObjectFile::getSectionRelBegin(DataRefImpl Sec) const { |
| const coff_section *sec = toSec(Sec); |
| DataRefImpl ret; |
| if (sec->NumberOfRelocations == 0) |
| ret.p = 0; |
| else |
| ret.p = reinterpret_cast<uintptr_t>(base() + sec->PointerToRelocations); |
| |
| return relocation_iterator(RelocationRef(ret, this)); |
| } |
| |
| relocation_iterator COFFObjectFile::getSectionRelEnd(DataRefImpl Sec) const { |
| const coff_section *sec = toSec(Sec); |
| DataRefImpl ret; |
| if (sec->NumberOfRelocations == 0) |
| ret.p = 0; |
| else |
| ret.p = reinterpret_cast<uintptr_t>( |
| reinterpret_cast<const coff_relocation*>( |
| base() + sec->PointerToRelocations) |
| + sec->NumberOfRelocations); |
| |
| return relocation_iterator(RelocationRef(ret, this)); |
| } |
| |
| COFFObjectFile::COFFObjectFile(MemoryBuffer *Object, error_code &ec) |
| : ObjectFile(Binary::ID_COFF, Object, ec) |
| , Header(0) |
| , SectionTable(0) |
| , SymbolTable(0) |
| , StringTable(0) |
| , StringTableSize(0) { |
| // Check that we at least have enough room for a header. |
| if (!checkSize(Data, ec, sizeof(coff_file_header))) return; |
| |
| // The actual starting location of the COFF header in the file. This can be |
| // non-zero in PE/COFF files. |
| uint64_t HeaderStart = 0; |
| |
| // Check if this is a PE/COFF file. |
| if (base()[0] == 0x4d && base()[1] == 0x5a) { |
| // PE/COFF, seek through MS-DOS compatibility stub and 4-byte |
| // PE signature to find 'normal' COFF header. |
| if (!checkSize(Data, ec, 0x3c + 8)) return; |
| HeaderStart = *reinterpret_cast<const ulittle16_t *>(base() + 0x3c); |
| // Check the PE header. ("PE\0\0") |
| if (std::memcmp(base() + HeaderStart, "PE\0\0", 4) != 0) { |
| ec = object_error::parse_failed; |
| return; |
| } |
| HeaderStart += 4; // Skip the PE Header. |
| } |
| |
| Header = reinterpret_cast<const coff_file_header *>(base() + HeaderStart); |
| if (!checkAddr(Data, ec, uintptr_t(Header), sizeof(coff_file_header))) |
| return; |
| |
| SectionTable = |
| reinterpret_cast<const coff_section *>( base() |
| + HeaderStart |
| + sizeof(coff_file_header) |
| + Header->SizeOfOptionalHeader); |
| if (!checkAddr(Data, ec, uintptr_t(SectionTable), |
| Header->NumberOfSections * sizeof(coff_section))) |
| return; |
| |
| if (Header->PointerToSymbolTable != 0) { |
| SymbolTable = |
| reinterpret_cast<const coff_symbol *>(base() |
| + Header->PointerToSymbolTable); |
| if (!checkAddr(Data, ec, uintptr_t(SymbolTable), |
| Header->NumberOfSymbols * sizeof(coff_symbol))) |
| return; |
| |
| // Find string table. |
| StringTable = reinterpret_cast<const char *>(base()) |
| + Header->PointerToSymbolTable |
| + Header->NumberOfSymbols * sizeof(coff_symbol); |
| if (!checkAddr(Data, ec, uintptr_t(StringTable), sizeof(ulittle32_t))) |
| return; |
| |
| StringTableSize = *reinterpret_cast<const ulittle32_t *>(StringTable); |
| if (!checkAddr(Data, ec, uintptr_t(StringTable), StringTableSize)) |
| return; |
| // Check that the string table is null terminated if has any in it. |
| if (StringTableSize < 4 |
| || (StringTableSize > 4 && StringTable[StringTableSize - 1] != 0)) { |
| ec = object_error::parse_failed; |
| return; |
| } |
| } |
| |
| ec = object_error::success; |
| } |
| |
| symbol_iterator COFFObjectFile::begin_symbols() const { |
| DataRefImpl ret; |
| ret.p = reinterpret_cast<intptr_t>(SymbolTable); |
| return symbol_iterator(SymbolRef(ret, this)); |
| } |
| |
| symbol_iterator COFFObjectFile::end_symbols() const { |
| // The symbol table ends where the string table begins. |
| DataRefImpl ret; |
| ret.p = reinterpret_cast<intptr_t>(StringTable); |
| return symbol_iterator(SymbolRef(ret, this)); |
| } |
| |
| symbol_iterator COFFObjectFile::begin_dynamic_symbols() const { |
| // TODO: implement |
| report_fatal_error("Dynamic symbols unimplemented in COFFObjectFile"); |
| } |
| |
| symbol_iterator COFFObjectFile::end_dynamic_symbols() const { |
| // TODO: implement |
| report_fatal_error("Dynamic symbols unimplemented in COFFObjectFile"); |
| } |
| |
| library_iterator COFFObjectFile::begin_libraries_needed() const { |
| // TODO: implement |
| report_fatal_error("Libraries needed unimplemented in COFFObjectFile"); |
| } |
| |
| library_iterator COFFObjectFile::end_libraries_needed() const { |
| // TODO: implement |
| report_fatal_error("Libraries needed unimplemented in COFFObjectFile"); |
| } |
| |
| StringRef COFFObjectFile::getLoadName() const { |
| // COFF does not have this field. |
| return ""; |
| } |
| |
| |
| section_iterator COFFObjectFile::begin_sections() const { |
| DataRefImpl ret; |
| ret.p = reinterpret_cast<intptr_t>(SectionTable); |
| return section_iterator(SectionRef(ret, this)); |
| } |
| |
| section_iterator COFFObjectFile::end_sections() const { |
| DataRefImpl ret; |
| ret.p = reinterpret_cast<intptr_t>(SectionTable + Header->NumberOfSections); |
| return section_iterator(SectionRef(ret, this)); |
| } |
| |
| uint8_t COFFObjectFile::getBytesInAddress() const { |
| return getArch() == Triple::x86_64 ? 8 : 4; |
| } |
| |
| StringRef COFFObjectFile::getFileFormatName() const { |
| switch(Header->Machine) { |
| case COFF::IMAGE_FILE_MACHINE_I386: |
| return "COFF-i386"; |
| case COFF::IMAGE_FILE_MACHINE_AMD64: |
| return "COFF-x86-64"; |
| default: |
| return "COFF-<unknown arch>"; |
| } |
| } |
| |
| unsigned COFFObjectFile::getArch() const { |
| switch(Header->Machine) { |
| case COFF::IMAGE_FILE_MACHINE_I386: |
| return Triple::x86; |
| case COFF::IMAGE_FILE_MACHINE_AMD64: |
| return Triple::x86_64; |
| default: |
| return Triple::UnknownArch; |
| } |
| } |
| |
| error_code COFFObjectFile::getHeader(const coff_file_header *&Res) const { |
| Res = Header; |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::getSection(int32_t index, |
| const coff_section *&Result) const { |
| // Check for special index values. |
| if (index == COFF::IMAGE_SYM_UNDEFINED || |
| index == COFF::IMAGE_SYM_ABSOLUTE || |
| index == COFF::IMAGE_SYM_DEBUG) |
| Result = NULL; |
| else if (index > 0 && index <= Header->NumberOfSections) |
| // We already verified the section table data, so no need to check again. |
| Result = SectionTable + (index - 1); |
| else |
| return object_error::parse_failed; |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::getString(uint32_t offset, |
| StringRef &Result) const { |
| if (StringTableSize <= 4) |
| // Tried to get a string from an empty string table. |
| return object_error::parse_failed; |
| if (offset >= StringTableSize) |
| return object_error::unexpected_eof; |
| Result = StringRef(StringTable + offset); |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::getSymbol(uint32_t index, |
| const coff_symbol *&Result) const { |
| if (index < Header->NumberOfSymbols) |
| Result = SymbolTable + index; |
| else |
| return object_error::parse_failed; |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::getSymbolName(const coff_symbol *symbol, |
| StringRef &Res) const { |
| // Check for string table entry. First 4 bytes are 0. |
| if (symbol->Name.Offset.Zeroes == 0) { |
| uint32_t Offset = symbol->Name.Offset.Offset; |
| if (error_code ec = getString(Offset, Res)) |
| return ec; |
| return object_error::success; |
| } |
| |
| if (symbol->Name.ShortName[7] == 0) |
| // Null terminated, let ::strlen figure out the length. |
| Res = StringRef(symbol->Name.ShortName); |
| else |
| // Not null terminated, use all 8 bytes. |
| Res = StringRef(symbol->Name.ShortName, 8); |
| return object_error::success; |
| } |
| |
| ArrayRef<uint8_t> COFFObjectFile::getSymbolAuxData( |
| const coff_symbol *symbol) const { |
| const uint8_t *aux = NULL; |
| |
| if ( symbol->NumberOfAuxSymbols > 0 ) { |
| // AUX data comes immediately after the symbol in COFF |
| aux = reinterpret_cast<const uint8_t *>(symbol + 1); |
| # ifndef NDEBUG |
| // Verify that the aux symbol points to a valid entry in the symbol table. |
| uintptr_t offset = uintptr_t(aux) - uintptr_t(base()); |
| if (offset < Header->PointerToSymbolTable |
| || offset >= Header->PointerToSymbolTable |
| + (Header->NumberOfSymbols * sizeof(coff_symbol))) |
| report_fatal_error("Aux Symbol data was outside of symbol table."); |
| |
| assert((offset - Header->PointerToSymbolTable) % sizeof(coff_symbol) |
| == 0 && "Aux Symbol data did not point to the beginning of a symbol"); |
| # endif |
| } |
| return ArrayRef<uint8_t>(aux, symbol->NumberOfAuxSymbols * sizeof(coff_symbol)); |
| } |
| |
| error_code COFFObjectFile::getSectionName(const coff_section *Sec, |
| StringRef &Res) const { |
| StringRef Name; |
| if (Sec->Name[7] == 0) |
| // Null terminated, let ::strlen figure out the length. |
| Name = Sec->Name; |
| else |
| // Not null terminated, use all 8 bytes. |
| Name = StringRef(Sec->Name, 8); |
| |
| // Check for string table entry. First byte is '/'. |
| if (Name[0] == '/') { |
| uint32_t Offset; |
| if (Name.substr(1).getAsInteger(10, Offset)) |
| return object_error::parse_failed; |
| if (error_code ec = getString(Offset, Name)) |
| return ec; |
| } |
| |
| Res = Name; |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::getSectionContents(const coff_section *Sec, |
| ArrayRef<uint8_t> &Res) const { |
| // The only thing that we need to verify is that the contents is contained |
| // within the file bounds. We don't need to make sure it doesn't cover other |
| // data, as there's nothing that says that is not allowed. |
| uintptr_t ConStart = uintptr_t(base()) + Sec->PointerToRawData; |
| uintptr_t ConEnd = ConStart + Sec->SizeOfRawData; |
| if (ConEnd > uintptr_t(Data->getBufferEnd())) |
| return object_error::parse_failed; |
| Res = ArrayRef<uint8_t>(reinterpret_cast<const unsigned char*>(ConStart), |
| Sec->SizeOfRawData); |
| return object_error::success; |
| } |
| |
| const coff_relocation *COFFObjectFile::toRel(DataRefImpl Rel) const { |
| return reinterpret_cast<const coff_relocation*>(Rel.p); |
| } |
| error_code COFFObjectFile::getRelocationNext(DataRefImpl Rel, |
| RelocationRef &Res) const { |
| Rel.p = reinterpret_cast<uintptr_t>( |
| reinterpret_cast<const coff_relocation*>(Rel.p) + 1); |
| Res = RelocationRef(Rel, this); |
| return object_error::success; |
| } |
| error_code COFFObjectFile::getRelocationAddress(DataRefImpl Rel, |
| uint64_t &Res) const { |
| Res = toRel(Rel)->VirtualAddress; |
| return object_error::success; |
| } |
| error_code COFFObjectFile::getRelocationOffset(DataRefImpl Rel, |
| uint64_t &Res) const { |
| Res = toRel(Rel)->VirtualAddress; |
| return object_error::success; |
| } |
| error_code COFFObjectFile::getRelocationSymbol(DataRefImpl Rel, |
| SymbolRef &Res) const { |
| const coff_relocation* R = toRel(Rel); |
| DataRefImpl Symb; |
| Symb.p = reinterpret_cast<uintptr_t>(SymbolTable + R->SymbolTableIndex); |
| Res = SymbolRef(Symb, this); |
| return object_error::success; |
| } |
| error_code COFFObjectFile::getRelocationType(DataRefImpl Rel, |
| uint64_t &Res) const { |
| const coff_relocation* R = toRel(Rel); |
| Res = R->Type; |
| return object_error::success; |
| } |
| |
| const coff_section *COFFObjectFile::getCOFFSection(section_iterator &It) const { |
| return toSec(It->getRawDataRefImpl()); |
| } |
| |
| const coff_symbol *COFFObjectFile::getCOFFSymbol(symbol_iterator &It) const { |
| return toSymb(It->getRawDataRefImpl()); |
| } |
| |
| const coff_relocation *COFFObjectFile::getCOFFRelocation( |
| relocation_iterator &It) const { |
| return toRel(It->getRawDataRefImpl()); |
| } |
| |
| |
| #define LLVM_COFF_SWITCH_RELOC_TYPE_NAME(enum) \ |
| case COFF::enum: res = #enum; break; |
| |
| error_code COFFObjectFile::getRelocationTypeName(DataRefImpl Rel, |
| SmallVectorImpl<char> &Result) const { |
| const coff_relocation *reloc = toRel(Rel); |
| StringRef res; |
| switch (Header->Machine) { |
| case COFF::IMAGE_FILE_MACHINE_AMD64: |
| switch (reloc->Type) { |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ABSOLUTE); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR64); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32NB); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_1); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_2); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_3); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_4); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_5); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECTION); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL7); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_TOKEN); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SREL32); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_PAIR); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SSPAN32); |
| default: |
| res = "Unknown"; |
| } |
| break; |
| case COFF::IMAGE_FILE_MACHINE_I386: |
| switch (reloc->Type) { |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_ABSOLUTE); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR16); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL16); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32NB); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SEG12); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECTION); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_TOKEN); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL7); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL32); |
| default: |
| res = "Unknown"; |
| } |
| break; |
| default: |
| res = "Unknown"; |
| } |
| Result.append(res.begin(), res.end()); |
| return object_error::success; |
| } |
| |
| #undef LLVM_COFF_SWITCH_RELOC_TYPE_NAME |
| |
| error_code COFFObjectFile::getRelocationAdditionalInfo(DataRefImpl Rel, |
| int64_t &Res) const { |
| Res = 0; |
| return object_error::success; |
| } |
| error_code COFFObjectFile::getRelocationValueString(DataRefImpl Rel, |
| SmallVectorImpl<char> &Result) const { |
| const coff_relocation *reloc = toRel(Rel); |
| const coff_symbol *symb = 0; |
| if (error_code ec = getSymbol(reloc->SymbolTableIndex, symb)) return ec; |
| DataRefImpl sym; |
| sym.p = reinterpret_cast<uintptr_t>(symb); |
| StringRef symname; |
| if (error_code ec = getSymbolName(sym, symname)) return ec; |
| Result.append(symname.begin(), symname.end()); |
| return object_error::success; |
| } |
| |
| error_code COFFObjectFile::getLibraryNext(DataRefImpl LibData, |
| LibraryRef &Result) const { |
| report_fatal_error("getLibraryNext not implemented in COFFObjectFile"); |
| } |
| |
| error_code COFFObjectFile::getLibraryPath(DataRefImpl LibData, |
| StringRef &Result) const { |
| report_fatal_error("getLibraryPath not implemented in COFFObjectFile"); |
| } |
| |
| namespace llvm { |
| |
| ObjectFile *ObjectFile::createCOFFObjectFile(MemoryBuffer *Object) { |
| error_code ec; |
| return new COFFObjectFile(Object, ec); |
| } |
| |
| } // end namespace llvm |