| //===- COFFObjectFile.cpp - COFF object file implementation ---------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file declares the COFFObjectFile class. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/ADT/ArrayRef.h" |
| #include "llvm/ADT/StringRef.h" |
| #include "llvm/ADT/StringSwitch.h" |
| #include "llvm/ADT/Triple.h" |
| #include "llvm/ADT/iterator_range.h" |
| #include "llvm/BinaryFormat/COFF.h" |
| #include "llvm/Object/Binary.h" |
| #include "llvm/Object/COFF.h" |
| #include "llvm/Object/Error.h" |
| #include "llvm/Object/ObjectFile.h" |
| #include "llvm/Support/BinaryStreamReader.h" |
| #include "llvm/Support/Endian.h" |
| #include "llvm/Support/Error.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/MathExtras.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include <algorithm> |
| #include <cassert> |
| #include <cinttypes> |
| #include <cstddef> |
| #include <cstring> |
| #include <limits> |
| #include <memory> |
| #include <system_error> |
| |
| using namespace llvm; |
| using namespace object; |
| |
| using support::ulittle16_t; |
| using support::ulittle32_t; |
| using support::ulittle64_t; |
| using support::little16_t; |
| |
| // Returns false if size is greater than the buffer size. And sets ec. |
| static bool checkSize(MemoryBufferRef M, std::error_code &EC, uint64_t Size) { |
| if (M.getBufferSize() < Size) { |
| EC = object_error::unexpected_eof; |
| return false; |
| } |
| return true; |
| } |
| |
| // Sets Obj unless any bytes in [addr, addr + size) fall outsize of m. |
| // Returns unexpected_eof if error. |
| template <typename T> |
| static Error getObject(const T *&Obj, MemoryBufferRef M, const void *Ptr, |
| const uint64_t Size = sizeof(T)) { |
| uintptr_t Addr = reinterpret_cast<uintptr_t>(Ptr); |
| if (Error E = Binary::checkOffset(M, Addr, Size)) |
| return E; |
| Obj = reinterpret_cast<const T *>(Addr); |
| return Error::success(); |
| } |
| |
| // Decode a string table entry in base 64 (//AAAAAA). Expects \arg Str without |
| // prefixed slashes. |
| static bool decodeBase64StringEntry(StringRef Str, uint32_t &Result) { |
| assert(Str.size() <= 6 && "String too long, possible overflow."); |
| if (Str.size() > 6) |
| return true; |
| |
| uint64_t Value = 0; |
| while (!Str.empty()) { |
| unsigned CharVal; |
| if (Str[0] >= 'A' && Str[0] <= 'Z') // 0..25 |
| CharVal = Str[0] - 'A'; |
| else if (Str[0] >= 'a' && Str[0] <= 'z') // 26..51 |
| CharVal = Str[0] - 'a' + 26; |
| else if (Str[0] >= '0' && Str[0] <= '9') // 52..61 |
| CharVal = Str[0] - '0' + 52; |
| else if (Str[0] == '+') // 62 |
| CharVal = 62; |
| else if (Str[0] == '/') // 63 |
| CharVal = 63; |
| else |
| return true; |
| |
| Value = (Value * 64) + CharVal; |
| Str = Str.substr(1); |
| } |
| |
| if (Value > std::numeric_limits<uint32_t>::max()) |
| return true; |
| |
| Result = static_cast<uint32_t>(Value); |
| return false; |
| } |
| |
| template <typename coff_symbol_type> |
| const coff_symbol_type *COFFObjectFile::toSymb(DataRefImpl Ref) const { |
| const coff_symbol_type *Addr = |
| reinterpret_cast<const coff_symbol_type *>(Ref.p); |
| |
| assert(!checkOffset(Data, reinterpret_cast<uintptr_t>(Addr), sizeof(*Addr))); |
| #ifndef NDEBUG |
| // Verify that the symbol points to a valid entry in the symbol table. |
| uintptr_t Offset = |
| reinterpret_cast<uintptr_t>(Addr) - reinterpret_cast<uintptr_t>(base()); |
| |
| assert((Offset - getPointerToSymbolTable()) % sizeof(coff_symbol_type) == 0 && |
| "Symbol did not point to the beginning of a symbol"); |
| #endif |
| |
| return Addr; |
| } |
| |
| const coff_section *COFFObjectFile::toSec(DataRefImpl Ref) const { |
| const coff_section *Addr = reinterpret_cast<const coff_section*>(Ref.p); |
| |
| #ifndef NDEBUG |
| // Verify that the section points to a valid entry in the section table. |
| if (Addr < SectionTable || Addr >= (SectionTable + getNumberOfSections())) |
| report_fatal_error("Section was outside of section table."); |
| |
| uintptr_t Offset = reinterpret_cast<uintptr_t>(Addr) - |
| reinterpret_cast<uintptr_t>(SectionTable); |
| assert(Offset % sizeof(coff_section) == 0 && |
| "Section did not point to the beginning of a section"); |
| #endif |
| |
| return Addr; |
| } |
| |
| void COFFObjectFile::moveSymbolNext(DataRefImpl &Ref) const { |
| auto End = reinterpret_cast<uintptr_t>(StringTable); |
| if (SymbolTable16) { |
| const coff_symbol16 *Symb = toSymb<coff_symbol16>(Ref); |
| Symb += 1 + Symb->NumberOfAuxSymbols; |
| Ref.p = std::min(reinterpret_cast<uintptr_t>(Symb), End); |
| } else if (SymbolTable32) { |
| const coff_symbol32 *Symb = toSymb<coff_symbol32>(Ref); |
| Symb += 1 + Symb->NumberOfAuxSymbols; |
| Ref.p = std::min(reinterpret_cast<uintptr_t>(Symb), End); |
| } else { |
| llvm_unreachable("no symbol table pointer!"); |
| } |
| } |
| |
| Expected<StringRef> COFFObjectFile::getSymbolName(DataRefImpl Ref) const { |
| return getSymbolName(getCOFFSymbol(Ref)); |
| } |
| |
| uint64_t COFFObjectFile::getSymbolValueImpl(DataRefImpl Ref) const { |
| return getCOFFSymbol(Ref).getValue(); |
| } |
| |
| uint32_t COFFObjectFile::getSymbolAlignment(DataRefImpl Ref) const { |
| // MSVC/link.exe seems to align symbols to the next-power-of-2 |
| // up to 32 bytes. |
| COFFSymbolRef Symb = getCOFFSymbol(Ref); |
| return std::min(uint64_t(32), PowerOf2Ceil(Symb.getValue())); |
| } |
| |
| Expected<uint64_t> COFFObjectFile::getSymbolAddress(DataRefImpl Ref) const { |
| uint64_t Result = cantFail(getSymbolValue(Ref)); |
| COFFSymbolRef Symb = getCOFFSymbol(Ref); |
| int32_t SectionNumber = Symb.getSectionNumber(); |
| |
| if (Symb.isAnyUndefined() || Symb.isCommon() || |
| COFF::isReservedSectionNumber(SectionNumber)) |
| return Result; |
| |
| Expected<const coff_section *> Section = getSection(SectionNumber); |
| if (!Section) |
| return Section.takeError(); |
| Result += (*Section)->VirtualAddress; |
| |
| // The section VirtualAddress does not include ImageBase, and we want to |
| // return virtual addresses. |
| Result += getImageBase(); |
| |
| return Result; |
| } |
| |
| Expected<SymbolRef::Type> COFFObjectFile::getSymbolType(DataRefImpl Ref) const { |
| COFFSymbolRef Symb = getCOFFSymbol(Ref); |
| int32_t SectionNumber = Symb.getSectionNumber(); |
| |
| if (Symb.getComplexType() == COFF::IMAGE_SYM_DTYPE_FUNCTION) |
| return SymbolRef::ST_Function; |
| if (Symb.isAnyUndefined()) |
| return SymbolRef::ST_Unknown; |
| if (Symb.isCommon()) |
| return SymbolRef::ST_Data; |
| if (Symb.isFileRecord()) |
| return SymbolRef::ST_File; |
| |
| // TODO: perhaps we need a new symbol type ST_Section. |
| if (SectionNumber == COFF::IMAGE_SYM_DEBUG || Symb.isSectionDefinition()) |
| return SymbolRef::ST_Debug; |
| |
| if (!COFF::isReservedSectionNumber(SectionNumber)) |
| return SymbolRef::ST_Data; |
| |
| return SymbolRef::ST_Other; |
| } |
| |
| Expected<uint32_t> COFFObjectFile::getSymbolFlags(DataRefImpl Ref) const { |
| COFFSymbolRef Symb = getCOFFSymbol(Ref); |
| uint32_t Result = SymbolRef::SF_None; |
| |
| if (Symb.isExternal() || Symb.isWeakExternal()) |
| Result |= SymbolRef::SF_Global; |
| |
| if (const coff_aux_weak_external *AWE = Symb.getWeakExternal()) { |
| Result |= SymbolRef::SF_Weak; |
| if (AWE->Characteristics != COFF::IMAGE_WEAK_EXTERN_SEARCH_ALIAS) |
| Result |= SymbolRef::SF_Undefined; |
| } |
| |
| if (Symb.getSectionNumber() == COFF::IMAGE_SYM_ABSOLUTE) |
| Result |= SymbolRef::SF_Absolute; |
| |
| if (Symb.isFileRecord()) |
| Result |= SymbolRef::SF_FormatSpecific; |
| |
| if (Symb.isSectionDefinition()) |
| Result |= SymbolRef::SF_FormatSpecific; |
| |
| if (Symb.isCommon()) |
| Result |= SymbolRef::SF_Common; |
| |
| if (Symb.isUndefined()) |
| Result |= SymbolRef::SF_Undefined; |
| |
| return Result; |
| } |
| |
| uint64_t COFFObjectFile::getCommonSymbolSizeImpl(DataRefImpl Ref) const { |
| COFFSymbolRef Symb = getCOFFSymbol(Ref); |
| return Symb.getValue(); |
| } |
| |
| Expected<section_iterator> |
| COFFObjectFile::getSymbolSection(DataRefImpl Ref) const { |
| COFFSymbolRef Symb = getCOFFSymbol(Ref); |
| if (COFF::isReservedSectionNumber(Symb.getSectionNumber())) |
| return section_end(); |
| Expected<const coff_section *> Sec = getSection(Symb.getSectionNumber()); |
| if (!Sec) |
| return Sec.takeError(); |
| DataRefImpl Ret; |
| Ret.p = reinterpret_cast<uintptr_t>(*Sec); |
| return section_iterator(SectionRef(Ret, this)); |
| } |
| |
| unsigned COFFObjectFile::getSymbolSectionID(SymbolRef Sym) const { |
| COFFSymbolRef Symb = getCOFFSymbol(Sym.getRawDataRefImpl()); |
| return Symb.getSectionNumber(); |
| } |
| |
| void COFFObjectFile::moveSectionNext(DataRefImpl &Ref) const { |
| const coff_section *Sec = toSec(Ref); |
| Sec += 1; |
| Ref.p = reinterpret_cast<uintptr_t>(Sec); |
| } |
| |
| Expected<StringRef> COFFObjectFile::getSectionName(DataRefImpl Ref) const { |
| const coff_section *Sec = toSec(Ref); |
| return getSectionName(Sec); |
| } |
| |
| uint64_t COFFObjectFile::getSectionAddress(DataRefImpl Ref) const { |
| const coff_section *Sec = toSec(Ref); |
| uint64_t Result = Sec->VirtualAddress; |
| |
| // The section VirtualAddress does not include ImageBase, and we want to |
| // return virtual addresses. |
| Result += getImageBase(); |
| return Result; |
| } |
| |
| uint64_t COFFObjectFile::getSectionIndex(DataRefImpl Sec) const { |
| return toSec(Sec) - SectionTable; |
| } |
| |
| uint64_t COFFObjectFile::getSectionSize(DataRefImpl Ref) const { |
| return getSectionSize(toSec(Ref)); |
| } |
| |
| Expected<ArrayRef<uint8_t>> |
| COFFObjectFile::getSectionContents(DataRefImpl Ref) const { |
| const coff_section *Sec = toSec(Ref); |
| ArrayRef<uint8_t> Res; |
| if (Error E = getSectionContents(Sec, Res)) |
| return std::move(E); |
| return Res; |
| } |
| |
| uint64_t COFFObjectFile::getSectionAlignment(DataRefImpl Ref) const { |
| const coff_section *Sec = toSec(Ref); |
| return Sec->getAlignment(); |
| } |
| |
| bool COFFObjectFile::isSectionCompressed(DataRefImpl Sec) const { |
| return false; |
| } |
| |
| bool COFFObjectFile::isSectionText(DataRefImpl Ref) const { |
| const coff_section *Sec = toSec(Ref); |
| return Sec->Characteristics & COFF::IMAGE_SCN_CNT_CODE; |
| } |
| |
| bool COFFObjectFile::isSectionData(DataRefImpl Ref) const { |
| const coff_section *Sec = toSec(Ref); |
| return Sec->Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA; |
| } |
| |
| bool COFFObjectFile::isSectionBSS(DataRefImpl Ref) const { |
| const coff_section *Sec = toSec(Ref); |
| const uint32_t BssFlags = COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA | |
| COFF::IMAGE_SCN_MEM_READ | |
| COFF::IMAGE_SCN_MEM_WRITE; |
| return (Sec->Characteristics & BssFlags) == BssFlags; |
| } |
| |
| // The .debug sections are the only debug sections for COFF |
| // (\see MCObjectFileInfo.cpp). |
| bool COFFObjectFile::isDebugSection(DataRefImpl Ref) const { |
| Expected<StringRef> SectionNameOrErr = getSectionName(Ref); |
| if (!SectionNameOrErr) { |
| // TODO: Report the error message properly. |
| consumeError(SectionNameOrErr.takeError()); |
| return false; |
| } |
| StringRef SectionName = SectionNameOrErr.get(); |
| return SectionName.startswith(".debug"); |
| } |
| |
| unsigned COFFObjectFile::getSectionID(SectionRef Sec) const { |
| uintptr_t Offset = |
| Sec.getRawDataRefImpl().p - reinterpret_cast<uintptr_t>(SectionTable); |
| assert((Offset % sizeof(coff_section)) == 0); |
| return (Offset / sizeof(coff_section)) + 1; |
| } |
| |
| bool COFFObjectFile::isSectionVirtual(DataRefImpl Ref) const { |
| const coff_section *Sec = toSec(Ref); |
| // In COFF, a virtual section won't have any in-file |
| // content, so the file pointer to the content will be zero. |
| return Sec->PointerToRawData == 0; |
| } |
| |
| static uint32_t getNumberOfRelocations(const coff_section *Sec, |
| MemoryBufferRef M, const uint8_t *base) { |
| // The field for the number of relocations in COFF section table is only |
| // 16-bit wide. If a section has more than 65535 relocations, 0xFFFF is set to |
| // NumberOfRelocations field, and the actual relocation count is stored in the |
| // VirtualAddress field in the first relocation entry. |
| if (Sec->hasExtendedRelocations()) { |
| const coff_relocation *FirstReloc; |
| if (Error E = getObject(FirstReloc, M, |
| reinterpret_cast<const coff_relocation *>( |
| base + Sec->PointerToRelocations))) { |
| consumeError(std::move(E)); |
| return 0; |
| } |
| // -1 to exclude this first relocation entry. |
| return FirstReloc->VirtualAddress - 1; |
| } |
| return Sec->NumberOfRelocations; |
| } |
| |
| static const coff_relocation * |
| getFirstReloc(const coff_section *Sec, MemoryBufferRef M, const uint8_t *Base) { |
| uint64_t NumRelocs = getNumberOfRelocations(Sec, M, Base); |
| if (!NumRelocs) |
| return nullptr; |
| auto begin = reinterpret_cast<const coff_relocation *>( |
| Base + Sec->PointerToRelocations); |
| if (Sec->hasExtendedRelocations()) { |
| // Skip the first relocation entry repurposed to store the number of |
| // relocations. |
| begin++; |
| } |
| if (auto E = Binary::checkOffset(M, reinterpret_cast<uintptr_t>(begin), |
| sizeof(coff_relocation) * NumRelocs)) { |
| consumeError(std::move(E)); |
| return nullptr; |
| } |
| return begin; |
| } |
| |
| relocation_iterator COFFObjectFile::section_rel_begin(DataRefImpl Ref) const { |
| const coff_section *Sec = toSec(Ref); |
| const coff_relocation *begin = getFirstReloc(Sec, Data, base()); |
| if (begin && Sec->VirtualAddress != 0) |
| report_fatal_error("Sections with relocations should have an address of 0"); |
| DataRefImpl Ret; |
| Ret.p = reinterpret_cast<uintptr_t>(begin); |
| return relocation_iterator(RelocationRef(Ret, this)); |
| } |
| |
| relocation_iterator COFFObjectFile::section_rel_end(DataRefImpl Ref) const { |
| const coff_section *Sec = toSec(Ref); |
| const coff_relocation *I = getFirstReloc(Sec, Data, base()); |
| if (I) |
| I += getNumberOfRelocations(Sec, Data, base()); |
| DataRefImpl Ret; |
| Ret.p = reinterpret_cast<uintptr_t>(I); |
| return relocation_iterator(RelocationRef(Ret, this)); |
| } |
| |
| // Initialize the pointer to the symbol table. |
| Error COFFObjectFile::initSymbolTablePtr() { |
| if (COFFHeader) |
| if (Error E = getObject( |
| SymbolTable16, Data, base() + getPointerToSymbolTable(), |
| (uint64_t)getNumberOfSymbols() * getSymbolTableEntrySize())) |
| return E; |
| |
| if (COFFBigObjHeader) |
| if (Error E = getObject( |
| SymbolTable32, Data, base() + getPointerToSymbolTable(), |
| (uint64_t)getNumberOfSymbols() * getSymbolTableEntrySize())) |
| return E; |
| |
| // Find string table. The first four byte of the string table contains the |
| // total size of the string table, including the size field itself. If the |
| // string table is empty, the value of the first four byte would be 4. |
| uint32_t StringTableOffset = getPointerToSymbolTable() + |
| getNumberOfSymbols() * getSymbolTableEntrySize(); |
| const uint8_t *StringTableAddr = base() + StringTableOffset; |
| const ulittle32_t *StringTableSizePtr; |
| if (Error E = getObject(StringTableSizePtr, Data, StringTableAddr)) |
| return E; |
| StringTableSize = *StringTableSizePtr; |
| if (Error E = getObject(StringTable, Data, StringTableAddr, StringTableSize)) |
| return E; |
| |
| // Treat table sizes < 4 as empty because contrary to the PECOFF spec, some |
| // tools like cvtres write a size of 0 for an empty table instead of 4. |
| if (StringTableSize < 4) |
| StringTableSize = 4; |
| |
| // Check that the string table is null terminated if has any in it. |
| if (StringTableSize > 4 && StringTable[StringTableSize - 1] != 0) |
| return errorCodeToError(object_error::parse_failed); |
| return Error::success(); |
| } |
| |
| uint64_t COFFObjectFile::getImageBase() const { |
| if (PE32Header) |
| return PE32Header->ImageBase; |
| else if (PE32PlusHeader) |
| return PE32PlusHeader->ImageBase; |
| // This actually comes up in practice. |
| return 0; |
| } |
| |
| // Returns the file offset for the given VA. |
| Error COFFObjectFile::getVaPtr(uint64_t Addr, uintptr_t &Res) const { |
| uint64_t ImageBase = getImageBase(); |
| uint64_t Rva = Addr - ImageBase; |
| assert(Rva <= UINT32_MAX); |
| return getRvaPtr((uint32_t)Rva, Res); |
| } |
| |
| // Returns the file offset for the given RVA. |
| Error COFFObjectFile::getRvaPtr(uint32_t Addr, uintptr_t &Res) const { |
| for (const SectionRef &S : sections()) { |
| const coff_section *Section = getCOFFSection(S); |
| uint32_t SectionStart = Section->VirtualAddress; |
| uint32_t SectionEnd = Section->VirtualAddress + Section->VirtualSize; |
| if (SectionStart <= Addr && Addr < SectionEnd) { |
| uint32_t Offset = Addr - SectionStart; |
| Res = reinterpret_cast<uintptr_t>(base()) + Section->PointerToRawData + |
| Offset; |
| return Error::success(); |
| } |
| } |
| return errorCodeToError(object_error::parse_failed); |
| } |
| |
| Error COFFObjectFile::getRvaAndSizeAsBytes(uint32_t RVA, uint32_t Size, |
| ArrayRef<uint8_t> &Contents) const { |
| for (const SectionRef &S : sections()) { |
| const coff_section *Section = getCOFFSection(S); |
| uint32_t SectionStart = Section->VirtualAddress; |
| // Check if this RVA is within the section bounds. Be careful about integer |
| // overflow. |
| uint32_t OffsetIntoSection = RVA - SectionStart; |
| if (SectionStart <= RVA && OffsetIntoSection < Section->VirtualSize && |
| Size <= Section->VirtualSize - OffsetIntoSection) { |
| uintptr_t Begin = reinterpret_cast<uintptr_t>(base()) + |
| Section->PointerToRawData + OffsetIntoSection; |
| Contents = |
| ArrayRef<uint8_t>(reinterpret_cast<const uint8_t *>(Begin), Size); |
| return Error::success(); |
| } |
| } |
| return errorCodeToError(object_error::parse_failed); |
| } |
| |
| // Returns hint and name fields, assuming \p Rva is pointing to a Hint/Name |
| // table entry. |
| Error COFFObjectFile::getHintName(uint32_t Rva, uint16_t &Hint, |
| StringRef &Name) const { |
| uintptr_t IntPtr = 0; |
| if (Error E = getRvaPtr(Rva, IntPtr)) |
| return E; |
| const uint8_t *Ptr = reinterpret_cast<const uint8_t *>(IntPtr); |
| Hint = *reinterpret_cast<const ulittle16_t *>(Ptr); |
| Name = StringRef(reinterpret_cast<const char *>(Ptr + 2)); |
| return Error::success(); |
| } |
| |
| Error COFFObjectFile::getDebugPDBInfo(const debug_directory *DebugDir, |
| const codeview::DebugInfo *&PDBInfo, |
| StringRef &PDBFileName) const { |
| ArrayRef<uint8_t> InfoBytes; |
| if (Error E = getRvaAndSizeAsBytes( |
| DebugDir->AddressOfRawData, DebugDir->SizeOfData, InfoBytes)) |
| return E; |
| if (InfoBytes.size() < sizeof(*PDBInfo) + 1) |
| return errorCodeToError(object_error::parse_failed); |
| PDBInfo = reinterpret_cast<const codeview::DebugInfo *>(InfoBytes.data()); |
| InfoBytes = InfoBytes.drop_front(sizeof(*PDBInfo)); |
| PDBFileName = StringRef(reinterpret_cast<const char *>(InfoBytes.data()), |
| InfoBytes.size()); |
| // Truncate the name at the first null byte. Ignore any padding. |
| PDBFileName = PDBFileName.split('\0').first; |
| return Error::success(); |
| } |
| |
| Error COFFObjectFile::getDebugPDBInfo(const codeview::DebugInfo *&PDBInfo, |
| StringRef &PDBFileName) const { |
| for (const debug_directory &D : debug_directories()) |
| if (D.Type == COFF::IMAGE_DEBUG_TYPE_CODEVIEW) |
| return getDebugPDBInfo(&D, PDBInfo, PDBFileName); |
| // If we get here, there is no PDB info to return. |
| PDBInfo = nullptr; |
| PDBFileName = StringRef(); |
| return Error::success(); |
| } |
| |
| // Find the import table. |
| Error COFFObjectFile::initImportTablePtr() { |
| // First, we get the RVA of the import table. If the file lacks a pointer to |
| // the import table, do nothing. |
| const data_directory *DataEntry = getDataDirectory(COFF::IMPORT_TABLE); |
| if (!DataEntry) |
| return Error::success(); |
| |
| // Do nothing if the pointer to import table is NULL. |
| if (DataEntry->RelativeVirtualAddress == 0) |
| return Error::success(); |
| |
| uint32_t ImportTableRva = DataEntry->RelativeVirtualAddress; |
| |
| // Find the section that contains the RVA. This is needed because the RVA is |
| // the import table's memory address which is different from its file offset. |
| uintptr_t IntPtr = 0; |
| if (Error E = getRvaPtr(ImportTableRva, IntPtr)) |
| return E; |
| if (Error E = checkOffset(Data, IntPtr, DataEntry->Size)) |
| return E; |
| ImportDirectory = reinterpret_cast< |
| const coff_import_directory_table_entry *>(IntPtr); |
| return Error::success(); |
| } |
| |
| // Initializes DelayImportDirectory and NumberOfDelayImportDirectory. |
| Error COFFObjectFile::initDelayImportTablePtr() { |
| const data_directory *DataEntry = |
| getDataDirectory(COFF::DELAY_IMPORT_DESCRIPTOR); |
| if (!DataEntry) |
| return Error::success(); |
| if (DataEntry->RelativeVirtualAddress == 0) |
| return Error::success(); |
| |
| uint32_t RVA = DataEntry->RelativeVirtualAddress; |
| NumberOfDelayImportDirectory = DataEntry->Size / |
| sizeof(delay_import_directory_table_entry) - 1; |
| |
| uintptr_t IntPtr = 0; |
| if (Error E = getRvaPtr(RVA, IntPtr)) |
| return E; |
| DelayImportDirectory = reinterpret_cast< |
| const delay_import_directory_table_entry *>(IntPtr); |
| return Error::success(); |
| } |
| |
| // Find the export table. |
| Error COFFObjectFile::initExportTablePtr() { |
| // First, we get the RVA of the export table. If the file lacks a pointer to |
| // the export table, do nothing. |
| const data_directory *DataEntry = getDataDirectory(COFF::EXPORT_TABLE); |
| if (!DataEntry) |
| return Error::success(); |
| |
| // Do nothing if the pointer to export table is NULL. |
| if (DataEntry->RelativeVirtualAddress == 0) |
| return Error::success(); |
| |
| uint32_t ExportTableRva = DataEntry->RelativeVirtualAddress; |
| uintptr_t IntPtr = 0; |
| if (Error E = getRvaPtr(ExportTableRva, IntPtr)) |
| return E; |
| ExportDirectory = |
| reinterpret_cast<const export_directory_table_entry *>(IntPtr); |
| return Error::success(); |
| } |
| |
| Error COFFObjectFile::initBaseRelocPtr() { |
| const data_directory *DataEntry = |
| getDataDirectory(COFF::BASE_RELOCATION_TABLE); |
| if (!DataEntry) |
| return Error::success(); |
| if (DataEntry->RelativeVirtualAddress == 0) |
| return Error::success(); |
| |
| uintptr_t IntPtr = 0; |
| if (Error E = getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr)) |
| return E; |
| BaseRelocHeader = reinterpret_cast<const coff_base_reloc_block_header *>( |
| IntPtr); |
| BaseRelocEnd = reinterpret_cast<coff_base_reloc_block_header *>( |
| IntPtr + DataEntry->Size); |
| // FIXME: Verify the section containing BaseRelocHeader has at least |
| // DataEntry->Size bytes after DataEntry->RelativeVirtualAddress. |
| return Error::success(); |
| } |
| |
| Error COFFObjectFile::initDebugDirectoryPtr() { |
| // Get the RVA of the debug directory. Do nothing if it does not exist. |
| const data_directory *DataEntry = getDataDirectory(COFF::DEBUG_DIRECTORY); |
| if (!DataEntry) |
| return Error::success(); |
| |
| // Do nothing if the RVA is NULL. |
| if (DataEntry->RelativeVirtualAddress == 0) |
| return Error::success(); |
| |
| // Check that the size is a multiple of the entry size. |
| if (DataEntry->Size % sizeof(debug_directory) != 0) |
| return errorCodeToError(object_error::parse_failed); |
| |
| uintptr_t IntPtr = 0; |
| if (Error E = getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr)) |
| return E; |
| DebugDirectoryBegin = reinterpret_cast<const debug_directory *>(IntPtr); |
| DebugDirectoryEnd = reinterpret_cast<const debug_directory *>( |
| IntPtr + DataEntry->Size); |
| // FIXME: Verify the section containing DebugDirectoryBegin has at least |
| // DataEntry->Size bytes after DataEntry->RelativeVirtualAddress. |
| return Error::success(); |
| } |
| |
| Error COFFObjectFile::initTLSDirectoryPtr() { |
| // Get the RVA of the TLS directory. Do nothing if it does not exist. |
| const data_directory *DataEntry = getDataDirectory(COFF::TLS_TABLE); |
| if (!DataEntry) |
| return Error::success(); |
| |
| // Do nothing if the RVA is NULL. |
| if (DataEntry->RelativeVirtualAddress == 0) |
| return Error::success(); |
| |
| uint64_t DirSize = |
| is64() ? sizeof(coff_tls_directory64) : sizeof(coff_tls_directory32); |
| |
| // Check that the size is correct. |
| if (DataEntry->Size != DirSize) |
| return createStringError( |
| object_error::parse_failed, |
| "TLS Directory size (%u) is not the expected size (%" PRIu64 ").", |
| static_cast<uint32_t>(DataEntry->Size), DirSize); |
| |
| uintptr_t IntPtr = 0; |
| if (Error E = getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr)) |
| return E; |
| |
| if (is64()) |
| TLSDirectory64 = reinterpret_cast<const coff_tls_directory64 *>(IntPtr); |
| else |
| TLSDirectory32 = reinterpret_cast<const coff_tls_directory32 *>(IntPtr); |
| |
| return Error::success(); |
| } |
| |
| Error COFFObjectFile::initLoadConfigPtr() { |
| // Get the RVA of the debug directory. Do nothing if it does not exist. |
| const data_directory *DataEntry = getDataDirectory(COFF::LOAD_CONFIG_TABLE); |
| if (!DataEntry) |
| return Error::success(); |
| |
| // Do nothing if the RVA is NULL. |
| if (DataEntry->RelativeVirtualAddress == 0) |
| return Error::success(); |
| uintptr_t IntPtr = 0; |
| if (Error E = getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr)) |
| return E; |
| |
| LoadConfig = (const void *)IntPtr; |
| return Error::success(); |
| } |
| |
| Expected<std::unique_ptr<COFFObjectFile>> |
| COFFObjectFile::create(MemoryBufferRef Object) { |
| std::unique_ptr<COFFObjectFile> Obj(new COFFObjectFile(std::move(Object))); |
| if (Error E = Obj->initialize()) |
| return std::move(E); |
| return std::move(Obj); |
| } |
| |
| COFFObjectFile::COFFObjectFile(MemoryBufferRef Object) |
| : ObjectFile(Binary::ID_COFF, Object), COFFHeader(nullptr), |
| COFFBigObjHeader(nullptr), PE32Header(nullptr), PE32PlusHeader(nullptr), |
| DataDirectory(nullptr), SectionTable(nullptr), SymbolTable16(nullptr), |
| SymbolTable32(nullptr), StringTable(nullptr), StringTableSize(0), |
| ImportDirectory(nullptr), DelayImportDirectory(nullptr), |
| NumberOfDelayImportDirectory(0), ExportDirectory(nullptr), |
| BaseRelocHeader(nullptr), BaseRelocEnd(nullptr), |
| DebugDirectoryBegin(nullptr), DebugDirectoryEnd(nullptr), |
| TLSDirectory32(nullptr), TLSDirectory64(nullptr) {} |
| |
| Error COFFObjectFile::initialize() { |
| // Check that we at least have enough room for a header. |
| std::error_code EC; |
| if (!checkSize(Data, EC, sizeof(coff_file_header))) |
| return errorCodeToError(EC); |
| |
| // The current location in the file where we are looking at. |
| uint64_t CurPtr = 0; |
| |
| // PE header is optional and is present only in executables. If it exists, |
| // it is placed right after COFF header. |
| bool HasPEHeader = false; |
| |
| // Check if this is a PE/COFF file. |
| if (checkSize(Data, EC, sizeof(dos_header) + sizeof(COFF::PEMagic))) { |
| // PE/COFF, seek through MS-DOS compatibility stub and 4-byte |
| // PE signature to find 'normal' COFF header. |
| const auto *DH = reinterpret_cast<const dos_header *>(base()); |
| if (DH->Magic[0] == 'M' && DH->Magic[1] == 'Z') { |
| CurPtr = DH->AddressOfNewExeHeader; |
| // Check the PE magic bytes. ("PE\0\0") |
| if (memcmp(base() + CurPtr, COFF::PEMagic, sizeof(COFF::PEMagic)) != 0) { |
| return errorCodeToError(object_error::parse_failed); |
| } |
| CurPtr += sizeof(COFF::PEMagic); // Skip the PE magic bytes. |
| HasPEHeader = true; |
| } |
| } |
| |
| if (Error E = getObject(COFFHeader, Data, base() + CurPtr)) |
| return E; |
| |
| // It might be a bigobj file, let's check. Note that COFF bigobj and COFF |
| // import libraries share a common prefix but bigobj is more restrictive. |
| if (!HasPEHeader && COFFHeader->Machine == COFF::IMAGE_FILE_MACHINE_UNKNOWN && |
| COFFHeader->NumberOfSections == uint16_t(0xffff) && |
| checkSize(Data, EC, sizeof(coff_bigobj_file_header))) { |
| if (Error E = getObject(COFFBigObjHeader, Data, base() + CurPtr)) |
| return E; |
| |
| // Verify that we are dealing with bigobj. |
| if (COFFBigObjHeader->Version >= COFF::BigObjHeader::MinBigObjectVersion && |
| std::memcmp(COFFBigObjHeader->UUID, COFF::BigObjMagic, |
| sizeof(COFF::BigObjMagic)) == 0) { |
| COFFHeader = nullptr; |
| CurPtr += sizeof(coff_bigobj_file_header); |
| } else { |
| // It's not a bigobj. |
| COFFBigObjHeader = nullptr; |
| } |
| } |
| if (COFFHeader) { |
| // The prior checkSize call may have failed. This isn't a hard error |
| // because we were just trying to sniff out bigobj. |
| EC = std::error_code(); |
| CurPtr += sizeof(coff_file_header); |
| |
| if (COFFHeader->isImportLibrary()) |
| return errorCodeToError(EC); |
| } |
| |
| if (HasPEHeader) { |
| const pe32_header *Header; |
| if (Error E = getObject(Header, Data, base() + CurPtr)) |
| return E; |
| |
| const uint8_t *DataDirAddr; |
| uint64_t DataDirSize; |
| if (Header->Magic == COFF::PE32Header::PE32) { |
| PE32Header = Header; |
| DataDirAddr = base() + CurPtr + sizeof(pe32_header); |
| DataDirSize = sizeof(data_directory) * PE32Header->NumberOfRvaAndSize; |
| } else if (Header->Magic == COFF::PE32Header::PE32_PLUS) { |
| PE32PlusHeader = reinterpret_cast<const pe32plus_header *>(Header); |
| DataDirAddr = base() + CurPtr + sizeof(pe32plus_header); |
| DataDirSize = sizeof(data_directory) * PE32PlusHeader->NumberOfRvaAndSize; |
| } else { |
| // It's neither PE32 nor PE32+. |
| return errorCodeToError(object_error::parse_failed); |
| } |
| if (Error E = getObject(DataDirectory, Data, DataDirAddr, DataDirSize)) |
| return E; |
| } |
| |
| if (COFFHeader) |
| CurPtr += COFFHeader->SizeOfOptionalHeader; |
| |
| assert(COFFHeader || COFFBigObjHeader); |
| |
| if (Error E = |
| getObject(SectionTable, Data, base() + CurPtr, |
| (uint64_t)getNumberOfSections() * sizeof(coff_section))) |
| return E; |
| |
| // Initialize the pointer to the symbol table. |
| if (getPointerToSymbolTable() != 0) { |
| if (Error E = initSymbolTablePtr()) { |
| // Recover from errors reading the symbol table. |
| consumeError(std::move(E)); |
| SymbolTable16 = nullptr; |
| SymbolTable32 = nullptr; |
| StringTable = nullptr; |
| StringTableSize = 0; |
| } |
| } else { |
| // We had better not have any symbols if we don't have a symbol table. |
| if (getNumberOfSymbols() != 0) { |
| return errorCodeToError(object_error::parse_failed); |
| } |
| } |
| |
| // Initialize the pointer to the beginning of the import table. |
| if (Error E = initImportTablePtr()) |
| return E; |
| if (Error E = initDelayImportTablePtr()) |
| return E; |
| |
| // Initialize the pointer to the export table. |
| if (Error E = initExportTablePtr()) |
| return E; |
| |
| // Initialize the pointer to the base relocation table. |
| if (Error E = initBaseRelocPtr()) |
| return E; |
| |
| // Initialize the pointer to the debug directory. |
| if (Error E = initDebugDirectoryPtr()) |
| return E; |
| |
| // Initialize the pointer to the TLS directory. |
| if (Error E = initTLSDirectoryPtr()) |
| return E; |
| |
| if (Error E = initLoadConfigPtr()) |
| return E; |
| |
| return Error::success(); |
| } |
| |
| basic_symbol_iterator COFFObjectFile::symbol_begin() const { |
| DataRefImpl Ret; |
| Ret.p = getSymbolTable(); |
| return basic_symbol_iterator(SymbolRef(Ret, this)); |
| } |
| |
| basic_symbol_iterator COFFObjectFile::symbol_end() const { |
| // The symbol table ends where the string table begins. |
| DataRefImpl Ret; |
| Ret.p = reinterpret_cast<uintptr_t>(StringTable); |
| return basic_symbol_iterator(SymbolRef(Ret, this)); |
| } |
| |
| import_directory_iterator COFFObjectFile::import_directory_begin() const { |
| if (!ImportDirectory) |
| return import_directory_end(); |
| if (ImportDirectory->isNull()) |
| return import_directory_end(); |
| return import_directory_iterator( |
| ImportDirectoryEntryRef(ImportDirectory, 0, this)); |
| } |
| |
| import_directory_iterator COFFObjectFile::import_directory_end() const { |
| return import_directory_iterator( |
| ImportDirectoryEntryRef(nullptr, -1, this)); |
| } |
| |
| delay_import_directory_iterator |
| COFFObjectFile::delay_import_directory_begin() const { |
| return delay_import_directory_iterator( |
| DelayImportDirectoryEntryRef(DelayImportDirectory, 0, this)); |
| } |
| |
| delay_import_directory_iterator |
| COFFObjectFile::delay_import_directory_end() const { |
| return delay_import_directory_iterator( |
| DelayImportDirectoryEntryRef( |
| DelayImportDirectory, NumberOfDelayImportDirectory, this)); |
| } |
| |
| export_directory_iterator COFFObjectFile::export_directory_begin() const { |
| return export_directory_iterator( |
| ExportDirectoryEntryRef(ExportDirectory, 0, this)); |
| } |
| |
| export_directory_iterator COFFObjectFile::export_directory_end() const { |
| if (!ExportDirectory) |
| return export_directory_iterator(ExportDirectoryEntryRef(nullptr, 0, this)); |
| ExportDirectoryEntryRef Ref(ExportDirectory, |
| ExportDirectory->AddressTableEntries, this); |
| return export_directory_iterator(Ref); |
| } |
| |
| section_iterator COFFObjectFile::section_begin() const { |
| DataRefImpl Ret; |
| Ret.p = reinterpret_cast<uintptr_t>(SectionTable); |
| return section_iterator(SectionRef(Ret, this)); |
| } |
| |
| section_iterator COFFObjectFile::section_end() const { |
| DataRefImpl Ret; |
| int NumSections = |
| COFFHeader && COFFHeader->isImportLibrary() ? 0 : getNumberOfSections(); |
| Ret.p = reinterpret_cast<uintptr_t>(SectionTable + NumSections); |
| return section_iterator(SectionRef(Ret, this)); |
| } |
| |
| base_reloc_iterator COFFObjectFile::base_reloc_begin() const { |
| return base_reloc_iterator(BaseRelocRef(BaseRelocHeader, this)); |
| } |
| |
| base_reloc_iterator COFFObjectFile::base_reloc_end() const { |
| return base_reloc_iterator(BaseRelocRef(BaseRelocEnd, this)); |
| } |
| |
| uint8_t COFFObjectFile::getBytesInAddress() const { |
| return getArch() == Triple::x86_64 || getArch() == Triple::aarch64 ? 8 : 4; |
| } |
| |
| StringRef COFFObjectFile::getFileFormatName() const { |
| switch(getMachine()) { |
| case COFF::IMAGE_FILE_MACHINE_I386: |
| return "COFF-i386"; |
| case COFF::IMAGE_FILE_MACHINE_AMD64: |
| return "COFF-x86-64"; |
| case COFF::IMAGE_FILE_MACHINE_ARMNT: |
| return "COFF-ARM"; |
| case COFF::IMAGE_FILE_MACHINE_ARM64: |
| return "COFF-ARM64"; |
| default: |
| return "COFF-<unknown arch>"; |
| } |
| } |
| |
| Triple::ArchType COFFObjectFile::getArch() const { |
| switch (getMachine()) { |
| case COFF::IMAGE_FILE_MACHINE_I386: |
| return Triple::x86; |
| case COFF::IMAGE_FILE_MACHINE_AMD64: |
| return Triple::x86_64; |
| case COFF::IMAGE_FILE_MACHINE_ARMNT: |
| return Triple::thumb; |
| case COFF::IMAGE_FILE_MACHINE_ARM64: |
| return Triple::aarch64; |
| default: |
| return Triple::UnknownArch; |
| } |
| } |
| |
| Expected<uint64_t> COFFObjectFile::getStartAddress() const { |
| if (PE32Header) |
| return PE32Header->AddressOfEntryPoint; |
| return 0; |
| } |
| |
| iterator_range<import_directory_iterator> |
| COFFObjectFile::import_directories() const { |
| return make_range(import_directory_begin(), import_directory_end()); |
| } |
| |
| iterator_range<delay_import_directory_iterator> |
| COFFObjectFile::delay_import_directories() const { |
| return make_range(delay_import_directory_begin(), |
| delay_import_directory_end()); |
| } |
| |
| iterator_range<export_directory_iterator> |
| COFFObjectFile::export_directories() const { |
| return make_range(export_directory_begin(), export_directory_end()); |
| } |
| |
| iterator_range<base_reloc_iterator> COFFObjectFile::base_relocs() const { |
| return make_range(base_reloc_begin(), base_reloc_end()); |
| } |
| |
| const data_directory *COFFObjectFile::getDataDirectory(uint32_t Index) const { |
| if (!DataDirectory) |
| return nullptr; |
| assert(PE32Header || PE32PlusHeader); |
| uint32_t NumEnt = PE32Header ? PE32Header->NumberOfRvaAndSize |
| : PE32PlusHeader->NumberOfRvaAndSize; |
| if (Index >= NumEnt) |
| return nullptr; |
| return &DataDirectory[Index]; |
| } |
| |
| Expected<const coff_section *> COFFObjectFile::getSection(int32_t Index) const { |
| // Perhaps getting the section of a reserved section index should be an error, |
| // but callers rely on this to return null. |
| if (COFF::isReservedSectionNumber(Index)) |
| return (const coff_section *)nullptr; |
| if (static_cast<uint32_t>(Index) <= getNumberOfSections()) { |
| // We already verified the section table data, so no need to check again. |
| return SectionTable + (Index - 1); |
| } |
| return errorCodeToError(object_error::parse_failed); |
| } |
| |
| Expected<StringRef> COFFObjectFile::getString(uint32_t Offset) const { |
| if (StringTableSize <= 4) |
| // Tried to get a string from an empty string table. |
| return errorCodeToError(object_error::parse_failed); |
| if (Offset >= StringTableSize) |
| return errorCodeToError(object_error::unexpected_eof); |
| return StringRef(StringTable + Offset); |
| } |
| |
| Expected<StringRef> COFFObjectFile::getSymbolName(COFFSymbolRef Symbol) const { |
| return getSymbolName(Symbol.getGeneric()); |
| } |
| |
| Expected<StringRef> |
| COFFObjectFile::getSymbolName(const coff_symbol_generic *Symbol) const { |
| // Check for string table entry. First 4 bytes are 0. |
| if (Symbol->Name.Offset.Zeroes == 0) |
| return getString(Symbol->Name.Offset.Offset); |
| |
| // Null terminated, let ::strlen figure out the length. |
| if (Symbol->Name.ShortName[COFF::NameSize - 1] == 0) |
| return StringRef(Symbol->Name.ShortName); |
| |
| // Not null terminated, use all 8 bytes. |
| return StringRef(Symbol->Name.ShortName, COFF::NameSize); |
| } |
| |
| ArrayRef<uint8_t> |
| COFFObjectFile::getSymbolAuxData(COFFSymbolRef Symbol) const { |
| const uint8_t *Aux = nullptr; |
| |
| size_t SymbolSize = getSymbolTableEntrySize(); |
| if (Symbol.getNumberOfAuxSymbols() > 0) { |
| // AUX data comes immediately after the symbol in COFF |
| Aux = reinterpret_cast<const uint8_t *>(Symbol.getRawPtr()) + SymbolSize; |
| #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 < getPointerToSymbolTable() || |
| Offset >= |
| getPointerToSymbolTable() + (getNumberOfSymbols() * SymbolSize)) |
| report_fatal_error("Aux Symbol data was outside of symbol table."); |
| |
| assert((Offset - getPointerToSymbolTable()) % SymbolSize == 0 && |
| "Aux Symbol data did not point to the beginning of a symbol"); |
| #endif |
| } |
| return makeArrayRef(Aux, Symbol.getNumberOfAuxSymbols() * SymbolSize); |
| } |
| |
| uint32_t COFFObjectFile::getSymbolIndex(COFFSymbolRef Symbol) const { |
| uintptr_t Offset = |
| reinterpret_cast<uintptr_t>(Symbol.getRawPtr()) - getSymbolTable(); |
| assert(Offset % getSymbolTableEntrySize() == 0 && |
| "Symbol did not point to the beginning of a symbol"); |
| size_t Index = Offset / getSymbolTableEntrySize(); |
| assert(Index < getNumberOfSymbols()); |
| return Index; |
| } |
| |
| Expected<StringRef> |
| COFFObjectFile::getSectionName(const coff_section *Sec) const { |
| StringRef Name; |
| if (Sec->Name[COFF::NameSize - 1] == 0) |
| // Null terminated, let ::strlen figure out the length. |
| Name = Sec->Name; |
| else |
| // Not null terminated, use all 8 bytes. |
| Name = StringRef(Sec->Name, COFF::NameSize); |
| |
| // Check for string table entry. First byte is '/'. |
| if (Name.startswith("/")) { |
| uint32_t Offset; |
| if (Name.startswith("//")) { |
| if (decodeBase64StringEntry(Name.substr(2), Offset)) |
| return createStringError(object_error::parse_failed, |
| "invalid section name"); |
| } else { |
| if (Name.substr(1).getAsInteger(10, Offset)) |
| return createStringError(object_error::parse_failed, |
| "invalid section name"); |
| } |
| return getString(Offset); |
| } |
| |
| return Name; |
| } |
| |
| uint64_t COFFObjectFile::getSectionSize(const coff_section *Sec) const { |
| // SizeOfRawData and VirtualSize change what they represent depending on |
| // whether or not we have an executable image. |
| // |
| // For object files, SizeOfRawData contains the size of section's data; |
| // VirtualSize should be zero but isn't due to buggy COFF writers. |
| // |
| // For executables, SizeOfRawData *must* be a multiple of FileAlignment; the |
| // actual section size is in VirtualSize. It is possible for VirtualSize to |
| // be greater than SizeOfRawData; the contents past that point should be |
| // considered to be zero. |
| if (getDOSHeader()) |
| return std::min(Sec->VirtualSize, Sec->SizeOfRawData); |
| return Sec->SizeOfRawData; |
| } |
| |
| Error COFFObjectFile::getSectionContents(const coff_section *Sec, |
| ArrayRef<uint8_t> &Res) const { |
| // In COFF, a virtual section won't have any in-file |
| // content, so the file pointer to the content will be zero. |
| if (Sec->PointerToRawData == 0) |
| return Error::success(); |
| // 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 = |
| reinterpret_cast<uintptr_t>(base()) + Sec->PointerToRawData; |
| uint32_t SectionSize = getSectionSize(Sec); |
| if (Error E = checkOffset(Data, ConStart, SectionSize)) |
| return E; |
| Res = makeArrayRef(reinterpret_cast<const uint8_t *>(ConStart), SectionSize); |
| return Error::success(); |
| } |
| |
| const coff_relocation *COFFObjectFile::toRel(DataRefImpl Rel) const { |
| return reinterpret_cast<const coff_relocation*>(Rel.p); |
| } |
| |
| void COFFObjectFile::moveRelocationNext(DataRefImpl &Rel) const { |
| Rel.p = reinterpret_cast<uintptr_t>( |
| reinterpret_cast<const coff_relocation*>(Rel.p) + 1); |
| } |
| |
| uint64_t COFFObjectFile::getRelocationOffset(DataRefImpl Rel) const { |
| const coff_relocation *R = toRel(Rel); |
| return R->VirtualAddress; |
| } |
| |
| symbol_iterator COFFObjectFile::getRelocationSymbol(DataRefImpl Rel) const { |
| const coff_relocation *R = toRel(Rel); |
| DataRefImpl Ref; |
| if (R->SymbolTableIndex >= getNumberOfSymbols()) |
| return symbol_end(); |
| if (SymbolTable16) |
| Ref.p = reinterpret_cast<uintptr_t>(SymbolTable16 + R->SymbolTableIndex); |
| else if (SymbolTable32) |
| Ref.p = reinterpret_cast<uintptr_t>(SymbolTable32 + R->SymbolTableIndex); |
| else |
| llvm_unreachable("no symbol table pointer!"); |
| return symbol_iterator(SymbolRef(Ref, this)); |
| } |
| |
| uint64_t COFFObjectFile::getRelocationType(DataRefImpl Rel) const { |
| const coff_relocation* R = toRel(Rel); |
| return R->Type; |
| } |
| |
| const coff_section * |
| COFFObjectFile::getCOFFSection(const SectionRef &Section) const { |
| return toSec(Section.getRawDataRefImpl()); |
| } |
| |
| COFFSymbolRef COFFObjectFile::getCOFFSymbol(const DataRefImpl &Ref) const { |
| if (SymbolTable16) |
| return toSymb<coff_symbol16>(Ref); |
| if (SymbolTable32) |
| return toSymb<coff_symbol32>(Ref); |
| llvm_unreachable("no symbol table pointer!"); |
| } |
| |
| COFFSymbolRef COFFObjectFile::getCOFFSymbol(const SymbolRef &Symbol) const { |
| return getCOFFSymbol(Symbol.getRawDataRefImpl()); |
| } |
| |
| const coff_relocation * |
| COFFObjectFile::getCOFFRelocation(const RelocationRef &Reloc) const { |
| return toRel(Reloc.getRawDataRefImpl()); |
| } |
| |
| ArrayRef<coff_relocation> |
| COFFObjectFile::getRelocations(const coff_section *Sec) const { |
| return {getFirstReloc(Sec, Data, base()), |
| getNumberOfRelocations(Sec, Data, base())}; |
| } |
| |
| #define LLVM_COFF_SWITCH_RELOC_TYPE_NAME(reloc_type) \ |
| case COFF::reloc_type: \ |
| return #reloc_type; |
| |
| StringRef COFFObjectFile::getRelocationTypeName(uint16_t Type) const { |
| switch (getMachine()) { |
| case COFF::IMAGE_FILE_MACHINE_AMD64: |
| switch (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: |
| return "Unknown"; |
| } |
| break; |
| case COFF::IMAGE_FILE_MACHINE_ARMNT: |
| switch (Type) { |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ABSOLUTE); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ADDR32); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ADDR32NB); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH24); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH11); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_TOKEN); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX24); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX11); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_REL32); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_SECTION); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_SECREL); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_MOV32A); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_MOV32T); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH20T); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH24T); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX23T); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_PAIR); |
| default: |
| return "Unknown"; |
| } |
| break; |
| case COFF::IMAGE_FILE_MACHINE_ARM64: |
| switch (Type) { |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_ABSOLUTE); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_ADDR32); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_ADDR32NB); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_BRANCH26); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_PAGEBASE_REL21); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_REL21); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_PAGEOFFSET_12A); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_PAGEOFFSET_12L); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_SECREL); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_SECREL_LOW12A); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_SECREL_HIGH12A); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_SECREL_LOW12L); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_TOKEN); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_SECTION); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_ADDR64); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_BRANCH19); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_BRANCH14); |
| LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_REL32); |
| default: |
| return "Unknown"; |
| } |
| break; |
| case COFF::IMAGE_FILE_MACHINE_I386: |
| switch (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: |
| return "Unknown"; |
| } |
| break; |
| default: |
| return "Unknown"; |
| } |
| } |
| |
| #undef LLVM_COFF_SWITCH_RELOC_TYPE_NAME |
| |
| void COFFObjectFile::getRelocationTypeName( |
| DataRefImpl Rel, SmallVectorImpl<char> &Result) const { |
| const coff_relocation *Reloc = toRel(Rel); |
| StringRef Res = getRelocationTypeName(Reloc->Type); |
| Result.append(Res.begin(), Res.end()); |
| } |
| |
| bool COFFObjectFile::isRelocatableObject() const { |
| return !DataDirectory; |
| } |
| |
| StringRef COFFObjectFile::mapDebugSectionName(StringRef Name) const { |
| return StringSwitch<StringRef>(Name) |
| .Case("eh_fram", "eh_frame") |
| .Default(Name); |
| } |
| |
| bool ImportDirectoryEntryRef:: |
| operator==(const ImportDirectoryEntryRef &Other) const { |
| return ImportTable == Other.ImportTable && Index == Other.Index; |
| } |
| |
| void ImportDirectoryEntryRef::moveNext() { |
| ++Index; |
| if (ImportTable[Index].isNull()) { |
| Index = -1; |
| ImportTable = nullptr; |
| } |
| } |
| |
| Error ImportDirectoryEntryRef::getImportTableEntry( |
| const coff_import_directory_table_entry *&Result) const { |
| return getObject(Result, OwningObject->Data, ImportTable + Index); |
| } |
| |
| static imported_symbol_iterator |
| makeImportedSymbolIterator(const COFFObjectFile *Object, |
| uintptr_t Ptr, int Index) { |
| if (Object->getBytesInAddress() == 4) { |
| auto *P = reinterpret_cast<const import_lookup_table_entry32 *>(Ptr); |
| return imported_symbol_iterator(ImportedSymbolRef(P, Index, Object)); |
| } |
| auto *P = reinterpret_cast<const import_lookup_table_entry64 *>(Ptr); |
| return imported_symbol_iterator(ImportedSymbolRef(P, Index, Object)); |
| } |
| |
| static imported_symbol_iterator |
| importedSymbolBegin(uint32_t RVA, const COFFObjectFile *Object) { |
| uintptr_t IntPtr = 0; |
| // FIXME: Handle errors. |
| cantFail(Object->getRvaPtr(RVA, IntPtr)); |
| return makeImportedSymbolIterator(Object, IntPtr, 0); |
| } |
| |
| static imported_symbol_iterator |
| importedSymbolEnd(uint32_t RVA, const COFFObjectFile *Object) { |
| uintptr_t IntPtr = 0; |
| // FIXME: Handle errors. |
| cantFail(Object->getRvaPtr(RVA, IntPtr)); |
| // Forward the pointer to the last entry which is null. |
| int Index = 0; |
| if (Object->getBytesInAddress() == 4) { |
| auto *Entry = reinterpret_cast<ulittle32_t *>(IntPtr); |
| while (*Entry++) |
| ++Index; |
| } else { |
| auto *Entry = reinterpret_cast<ulittle64_t *>(IntPtr); |
| while (*Entry++) |
| ++Index; |
| } |
| return makeImportedSymbolIterator(Object, IntPtr, Index); |
| } |
| |
| imported_symbol_iterator |
| ImportDirectoryEntryRef::imported_symbol_begin() const { |
| return importedSymbolBegin(ImportTable[Index].ImportAddressTableRVA, |
| OwningObject); |
| } |
| |
| imported_symbol_iterator |
| ImportDirectoryEntryRef::imported_symbol_end() const { |
| return importedSymbolEnd(ImportTable[Index].ImportAddressTableRVA, |
| OwningObject); |
| } |
| |
| iterator_range<imported_symbol_iterator> |
| ImportDirectoryEntryRef::imported_symbols() const { |
| return make_range(imported_symbol_begin(), imported_symbol_end()); |
| } |
| |
| imported_symbol_iterator ImportDirectoryEntryRef::lookup_table_begin() const { |
| return importedSymbolBegin(ImportTable[Index].ImportLookupTableRVA, |
| OwningObject); |
| } |
| |
| imported_symbol_iterator ImportDirectoryEntryRef::lookup_table_end() const { |
| return importedSymbolEnd(ImportTable[Index].ImportLookupTableRVA, |
| OwningObject); |
| } |
| |
| iterator_range<imported_symbol_iterator> |
| ImportDirectoryEntryRef::lookup_table_symbols() const { |
| return make_range(lookup_table_begin(), lookup_table_end()); |
| } |
| |
| Error ImportDirectoryEntryRef::getName(StringRef &Result) const { |
| uintptr_t IntPtr = 0; |
| if (Error E = OwningObject->getRvaPtr(ImportTable[Index].NameRVA, IntPtr)) |
| return E; |
| Result = StringRef(reinterpret_cast<const char *>(IntPtr)); |
| return Error::success(); |
| } |
| |
| Error |
| ImportDirectoryEntryRef::getImportLookupTableRVA(uint32_t &Result) const { |
| Result = ImportTable[Index].ImportLookupTableRVA; |
| return Error::success(); |
| } |
| |
| Error ImportDirectoryEntryRef::getImportAddressTableRVA( |
| uint32_t &Result) const { |
| Result = ImportTable[Index].ImportAddressTableRVA; |
| return Error::success(); |
| } |
| |
| bool DelayImportDirectoryEntryRef:: |
| operator==(const DelayImportDirectoryEntryRef &Other) const { |
| return Table == Other.Table && Index == Other.Index; |
| } |
| |
| void DelayImportDirectoryEntryRef::moveNext() { |
| ++Index; |
| } |
| |
| imported_symbol_iterator |
| DelayImportDirectoryEntryRef::imported_symbol_begin() const { |
| return importedSymbolBegin(Table[Index].DelayImportNameTable, |
| OwningObject); |
| } |
| |
| imported_symbol_iterator |
| DelayImportDirectoryEntryRef::imported_symbol_end() const { |
| return importedSymbolEnd(Table[Index].DelayImportNameTable, |
| OwningObject); |
| } |
| |
| iterator_range<imported_symbol_iterator> |
| DelayImportDirectoryEntryRef::imported_symbols() const { |
| return make_range(imported_symbol_begin(), imported_symbol_end()); |
| } |
| |
| Error DelayImportDirectoryEntryRef::getName(StringRef &Result) const { |
| uintptr_t IntPtr = 0; |
| if (Error E = OwningObject->getRvaPtr(Table[Index].Name, IntPtr)) |
| return E; |
| Result = StringRef(reinterpret_cast<const char *>(IntPtr)); |
| return Error::success(); |
| } |
| |
| Error DelayImportDirectoryEntryRef::getDelayImportTable( |
| const delay_import_directory_table_entry *&Result) const { |
| Result = &Table[Index]; |
| return Error::success(); |
| } |
| |
| Error DelayImportDirectoryEntryRef::getImportAddress(int AddrIndex, |
| uint64_t &Result) const { |
| uint32_t RVA = Table[Index].DelayImportAddressTable + |
| AddrIndex * (OwningObject->is64() ? 8 : 4); |
| uintptr_t IntPtr = 0; |
| if (Error E = OwningObject->getRvaPtr(RVA, IntPtr)) |
| return E; |
| if (OwningObject->is64()) |
| Result = *reinterpret_cast<const ulittle64_t *>(IntPtr); |
| else |
| Result = *reinterpret_cast<const ulittle32_t *>(IntPtr); |
| return Error::success(); |
| } |
| |
| bool ExportDirectoryEntryRef:: |
| operator==(const ExportDirectoryEntryRef &Other) const { |
| return ExportTable == Other.ExportTable && Index == Other.Index; |
| } |
| |
| void ExportDirectoryEntryRef::moveNext() { |
| ++Index; |
| } |
| |
| // Returns the name of the current export symbol. If the symbol is exported only |
| // by ordinal, the empty string is set as a result. |
| Error ExportDirectoryEntryRef::getDllName(StringRef &Result) const { |
| uintptr_t IntPtr = 0; |
| if (Error E = OwningObject->getRvaPtr(ExportTable->NameRVA, IntPtr)) |
| return E; |
| Result = StringRef(reinterpret_cast<const char *>(IntPtr)); |
| return Error::success(); |
| } |
| |
| // Returns the starting ordinal number. |
| Error ExportDirectoryEntryRef::getOrdinalBase(uint32_t &Result) const { |
| Result = ExportTable->OrdinalBase; |
| return Error::success(); |
| } |
| |
| // Returns the export ordinal of the current export symbol. |
| Error ExportDirectoryEntryRef::getOrdinal(uint32_t &Result) const { |
| Result = ExportTable->OrdinalBase + Index; |
| return Error::success(); |
| } |
| |
| // Returns the address of the current export symbol. |
| Error ExportDirectoryEntryRef::getExportRVA(uint32_t &Result) const { |
| uintptr_t IntPtr = 0; |
| if (Error EC = |
| OwningObject->getRvaPtr(ExportTable->ExportAddressTableRVA, IntPtr)) |
| return EC; |
| const export_address_table_entry *entry = |
| reinterpret_cast<const export_address_table_entry *>(IntPtr); |
| Result = entry[Index].ExportRVA; |
| return Error::success(); |
| } |
| |
| // Returns the name of the current export symbol. If the symbol is exported only |
| // by ordinal, the empty string is set as a result. |
| Error |
| ExportDirectoryEntryRef::getSymbolName(StringRef &Result) const { |
| uintptr_t IntPtr = 0; |
| if (Error EC = |
| OwningObject->getRvaPtr(ExportTable->OrdinalTableRVA, IntPtr)) |
| return EC; |
| const ulittle16_t *Start = reinterpret_cast<const ulittle16_t *>(IntPtr); |
| |
| uint32_t NumEntries = ExportTable->NumberOfNamePointers; |
| int Offset = 0; |
| for (const ulittle16_t *I = Start, *E = Start + NumEntries; |
| I < E; ++I, ++Offset) { |
| if (*I != Index) |
| continue; |
| if (Error EC = |
| OwningObject->getRvaPtr(ExportTable->NamePointerRVA, IntPtr)) |
| return EC; |
| const ulittle32_t *NamePtr = reinterpret_cast<const ulittle32_t *>(IntPtr); |
| if (Error EC = OwningObject->getRvaPtr(NamePtr[Offset], IntPtr)) |
| return EC; |
| Result = StringRef(reinterpret_cast<const char *>(IntPtr)); |
| return Error::success(); |
| } |
| Result = ""; |
| return Error::success(); |
| } |
| |
| Error ExportDirectoryEntryRef::isForwarder(bool &Result) const { |
| const data_directory *DataEntry = |
| OwningObject->getDataDirectory(COFF::EXPORT_TABLE); |
| if (!DataEntry) |
| return errorCodeToError(object_error::parse_failed); |
| uint32_t RVA; |
| if (auto EC = getExportRVA(RVA)) |
| return EC; |
| uint32_t Begin = DataEntry->RelativeVirtualAddress; |
| uint32_t End = DataEntry->RelativeVirtualAddress + DataEntry->Size; |
| Result = (Begin <= RVA && RVA < End); |
| return Error::success(); |
| } |
| |
| Error ExportDirectoryEntryRef::getForwardTo(StringRef &Result) const { |
| uint32_t RVA; |
| if (auto EC = getExportRVA(RVA)) |
| return EC; |
| uintptr_t IntPtr = 0; |
| if (auto EC = OwningObject->getRvaPtr(RVA, IntPtr)) |
| return EC; |
| Result = StringRef(reinterpret_cast<const char *>(IntPtr)); |
| return Error::success(); |
| } |
| |
| bool ImportedSymbolRef:: |
| operator==(const ImportedSymbolRef &Other) const { |
| return Entry32 == Other.Entry32 && Entry64 == Other.Entry64 |
| && Index == Other.Index; |
| } |
| |
| void ImportedSymbolRef::moveNext() { |
| ++Index; |
| } |
| |
| Error ImportedSymbolRef::getSymbolName(StringRef &Result) const { |
| uint32_t RVA; |
| if (Entry32) { |
| // If a symbol is imported only by ordinal, it has no name. |
| if (Entry32[Index].isOrdinal()) |
| return Error::success(); |
| RVA = Entry32[Index].getHintNameRVA(); |
| } else { |
| if (Entry64[Index].isOrdinal()) |
| return Error::success(); |
| RVA = Entry64[Index].getHintNameRVA(); |
| } |
| uintptr_t IntPtr = 0; |
| if (Error EC = OwningObject->getRvaPtr(RVA, IntPtr)) |
| return EC; |
| // +2 because the first two bytes is hint. |
| Result = StringRef(reinterpret_cast<const char *>(IntPtr + 2)); |
| return Error::success(); |
| } |
| |
| Error ImportedSymbolRef::isOrdinal(bool &Result) const { |
| if (Entry32) |
| Result = Entry32[Index].isOrdinal(); |
| else |
| Result = Entry64[Index].isOrdinal(); |
| return Error::success(); |
| } |
| |
| Error ImportedSymbolRef::getHintNameRVA(uint32_t &Result) const { |
| if (Entry32) |
| Result = Entry32[Index].getHintNameRVA(); |
| else |
| Result = Entry64[Index].getHintNameRVA(); |
| return Error::success(); |
| } |
| |
| Error ImportedSymbolRef::getOrdinal(uint16_t &Result) const { |
| uint32_t RVA; |
| if (Entry32) { |
| if (Entry32[Index].isOrdinal()) { |
| Result = Entry32[Index].getOrdinal(); |
| return Error::success(); |
| } |
| RVA = Entry32[Index].getHintNameRVA(); |
| } else { |
| if (Entry64[Index].isOrdinal()) { |
| Result = Entry64[Index].getOrdinal(); |
| return Error::success(); |
| } |
| RVA = Entry64[Index].getHintNameRVA(); |
| } |
| uintptr_t IntPtr = 0; |
| if (Error EC = OwningObject->getRvaPtr(RVA, IntPtr)) |
| return EC; |
| Result = *reinterpret_cast<const ulittle16_t *>(IntPtr); |
| return Error::success(); |
| } |
| |
| Expected<std::unique_ptr<COFFObjectFile>> |
| ObjectFile::createCOFFObjectFile(MemoryBufferRef Object) { |
| return COFFObjectFile::create(Object); |
| } |
| |
| bool BaseRelocRef::operator==(const BaseRelocRef &Other) const { |
| return Header == Other.Header && Index == Other.Index; |
| } |
| |
| void BaseRelocRef::moveNext() { |
| // Header->BlockSize is the size of the current block, including the |
| // size of the header itself. |
| uint32_t Size = sizeof(*Header) + |
| sizeof(coff_base_reloc_block_entry) * (Index + 1); |
| if (Size == Header->BlockSize) { |
| // .reloc contains a list of base relocation blocks. Each block |
| // consists of the header followed by entries. The header contains |
| // how many entories will follow. When we reach the end of the |
| // current block, proceed to the next block. |
| Header = reinterpret_cast<const coff_base_reloc_block_header *>( |
| reinterpret_cast<const uint8_t *>(Header) + Size); |
| Index = 0; |
| } else { |
| ++Index; |
| } |
| } |
| |
| Error BaseRelocRef::getType(uint8_t &Type) const { |
| auto *Entry = reinterpret_cast<const coff_base_reloc_block_entry *>(Header + 1); |
| Type = Entry[Index].getType(); |
| return Error::success(); |
| } |
| |
| Error BaseRelocRef::getRVA(uint32_t &Result) const { |
| auto *Entry = reinterpret_cast<const coff_base_reloc_block_entry *>(Header + 1); |
| Result = Header->PageRVA + Entry[Index].getOffset(); |
| return Error::success(); |
| } |
| |
| #define RETURN_IF_ERROR(Expr) \ |
| do { \ |
| Error E = (Expr); \ |
| if (E) \ |
| return std::move(E); \ |
| } while (0) |
| |
| Expected<ArrayRef<UTF16>> |
| ResourceSectionRef::getDirStringAtOffset(uint32_t Offset) { |
| BinaryStreamReader Reader = BinaryStreamReader(BBS); |
| Reader.setOffset(Offset); |
| uint16_t Length; |
| RETURN_IF_ERROR(Reader.readInteger(Length)); |
| ArrayRef<UTF16> RawDirString; |
| RETURN_IF_ERROR(Reader.readArray(RawDirString, Length)); |
| return RawDirString; |
| } |
| |
| Expected<ArrayRef<UTF16>> |
| ResourceSectionRef::getEntryNameString(const coff_resource_dir_entry &Entry) { |
| return getDirStringAtOffset(Entry.Identifier.getNameOffset()); |
| } |
| |
| Expected<const coff_resource_dir_table &> |
| ResourceSectionRef::getTableAtOffset(uint32_t Offset) { |
| const coff_resource_dir_table *Table = nullptr; |
| |
| BinaryStreamReader Reader(BBS); |
| Reader.setOffset(Offset); |
| RETURN_IF_ERROR(Reader.readObject(Table)); |
| assert(Table != nullptr); |
| return *Table; |
| } |
| |
| Expected<const coff_resource_dir_entry &> |
| ResourceSectionRef::getTableEntryAtOffset(uint32_t Offset) { |
| const coff_resource_dir_entry *Entry = nullptr; |
| |
| BinaryStreamReader Reader(BBS); |
| Reader.setOffset(Offset); |
| RETURN_IF_ERROR(Reader.readObject(Entry)); |
| assert(Entry != nullptr); |
| return *Entry; |
| } |
| |
| Expected<const coff_resource_data_entry &> |
| ResourceSectionRef::getDataEntryAtOffset(uint32_t Offset) { |
| const coff_resource_data_entry *Entry = nullptr; |
| |
| BinaryStreamReader Reader(BBS); |
| Reader.setOffset(Offset); |
| RETURN_IF_ERROR(Reader.readObject(Entry)); |
| assert(Entry != nullptr); |
| return *Entry; |
| } |
| |
| Expected<const coff_resource_dir_table &> |
| ResourceSectionRef::getEntrySubDir(const coff_resource_dir_entry &Entry) { |
| assert(Entry.Offset.isSubDir()); |
| return getTableAtOffset(Entry.Offset.value()); |
| } |
| |
| Expected<const coff_resource_data_entry &> |
| ResourceSectionRef::getEntryData(const coff_resource_dir_entry &Entry) { |
| assert(!Entry.Offset.isSubDir()); |
| return getDataEntryAtOffset(Entry.Offset.value()); |
| } |
| |
| Expected<const coff_resource_dir_table &> ResourceSectionRef::getBaseTable() { |
| return getTableAtOffset(0); |
| } |
| |
| Expected<const coff_resource_dir_entry &> |
| ResourceSectionRef::getTableEntry(const coff_resource_dir_table &Table, |
| uint32_t Index) { |
| if (Index >= (uint32_t)(Table.NumberOfNameEntries + Table.NumberOfIDEntries)) |
| return createStringError(object_error::parse_failed, "index out of range"); |
| const uint8_t *TablePtr = reinterpret_cast<const uint8_t *>(&Table); |
| ptrdiff_t TableOffset = TablePtr - BBS.data().data(); |
| return getTableEntryAtOffset(TableOffset + sizeof(Table) + |
| Index * sizeof(coff_resource_dir_entry)); |
| } |
| |
| Error ResourceSectionRef::load(const COFFObjectFile *O) { |
| for (const SectionRef &S : O->sections()) { |
| Expected<StringRef> Name = S.getName(); |
| if (!Name) |
| return Name.takeError(); |
| |
| if (*Name == ".rsrc" || *Name == ".rsrc$01") |
| return load(O, S); |
| } |
| return createStringError(object_error::parse_failed, |
| "no resource section found"); |
| } |
| |
| Error ResourceSectionRef::load(const COFFObjectFile *O, const SectionRef &S) { |
| Obj = O; |
| Section = S; |
| Expected<StringRef> Contents = Section.getContents(); |
| if (!Contents) |
| return Contents.takeError(); |
| BBS = BinaryByteStream(*Contents, support::little); |
| const coff_section *COFFSect = Obj->getCOFFSection(Section); |
| ArrayRef<coff_relocation> OrigRelocs = Obj->getRelocations(COFFSect); |
| Relocs.reserve(OrigRelocs.size()); |
| for (const coff_relocation &R : OrigRelocs) |
| Relocs.push_back(&R); |
| llvm::sort(Relocs, [](const coff_relocation *A, const coff_relocation *B) { |
| return A->VirtualAddress < B->VirtualAddress; |
| }); |
| return Error::success(); |
| } |
| |
| Expected<StringRef> |
| ResourceSectionRef::getContents(const coff_resource_data_entry &Entry) { |
| if (!Obj) |
| return createStringError(object_error::parse_failed, "no object provided"); |
| |
| // Find a potential relocation at the DataRVA field (first member of |
| // the coff_resource_data_entry struct). |
| const uint8_t *EntryPtr = reinterpret_cast<const uint8_t *>(&Entry); |
| ptrdiff_t EntryOffset = EntryPtr - BBS.data().data(); |
| coff_relocation RelocTarget{ulittle32_t(EntryOffset), ulittle32_t(0), |
| ulittle16_t(0)}; |
| auto RelocsForOffset = |
| std::equal_range(Relocs.begin(), Relocs.end(), &RelocTarget, |
| [](const coff_relocation *A, const coff_relocation *B) { |
| return A->VirtualAddress < B->VirtualAddress; |
| }); |
| |
| if (RelocsForOffset.first != RelocsForOffset.second) { |
| // We found a relocation with the right offset. Check that it does have |
| // the expected type. |
| const coff_relocation &R = **RelocsForOffset.first; |
| uint16_t RVAReloc; |
| switch (Obj->getMachine()) { |
| case COFF::IMAGE_FILE_MACHINE_I386: |
| RVAReloc = COFF::IMAGE_REL_I386_DIR32NB; |
| break; |
| case COFF::IMAGE_FILE_MACHINE_AMD64: |
| RVAReloc = COFF::IMAGE_REL_AMD64_ADDR32NB; |
| break; |
| case COFF::IMAGE_FILE_MACHINE_ARMNT: |
| RVAReloc = COFF::IMAGE_REL_ARM_ADDR32NB; |
| break; |
| case COFF::IMAGE_FILE_MACHINE_ARM64: |
| RVAReloc = COFF::IMAGE_REL_ARM64_ADDR32NB; |
| break; |
| default: |
| return createStringError(object_error::parse_failed, |
| "unsupported architecture"); |
| } |
| if (R.Type != RVAReloc) |
| return createStringError(object_error::parse_failed, |
| "unexpected relocation type"); |
| // Get the relocation's symbol |
| Expected<COFFSymbolRef> Sym = Obj->getSymbol(R.SymbolTableIndex); |
| if (!Sym) |
| return Sym.takeError(); |
| // And the symbol's section |
| Expected<const coff_section *> Section = |
| Obj->getSection(Sym->getSectionNumber()); |
| if (!Section) |
| return Section.takeError(); |
| // Add the initial value of DataRVA to the symbol's offset to find the |
| // data it points at. |
| uint64_t Offset = Entry.DataRVA + Sym->getValue(); |
| ArrayRef<uint8_t> Contents; |
| if (Error E = Obj->getSectionContents(*Section, Contents)) |
| return std::move(E); |
| if (Offset + Entry.DataSize > Contents.size()) |
| return createStringError(object_error::parse_failed, |
| "data outside of section"); |
| // Return a reference to the data inside the section. |
| return StringRef(reinterpret_cast<const char *>(Contents.data()) + Offset, |
| Entry.DataSize); |
| } else { |
| // Relocatable objects need a relocation for the DataRVA field. |
| if (Obj->isRelocatableObject()) |
| return createStringError(object_error::parse_failed, |
| "no relocation found for DataRVA"); |
| |
| // Locate the section that contains the address that DataRVA points at. |
| uint64_t VA = Entry.DataRVA + Obj->getImageBase(); |
| for (const SectionRef &S : Obj->sections()) { |
| if (VA >= S.getAddress() && |
| VA + Entry.DataSize <= S.getAddress() + S.getSize()) { |
| uint64_t Offset = VA - S.getAddress(); |
| Expected<StringRef> Contents = S.getContents(); |
| if (!Contents) |
| return Contents.takeError(); |
| return Contents->slice(Offset, Offset + Entry.DataSize); |
| } |
| } |
| return createStringError(object_error::parse_failed, |
| "address not found in image"); |
| } |
| } |