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authorDimitry Andric <dim@FreeBSD.org>2019-12-20 19:53:05 +0000
committerDimitry Andric <dim@FreeBSD.org>2019-12-20 19:53:05 +0000
commit0b57cec536236d46e3dba9bd041533462f33dbb7 (patch)
tree56229dbdbbf76d18580f72f789003db17246c8d9 /contrib/llvm/lib/Object/COFFObjectFile.cpp
parent718ef55ec7785aae63f98f8ca05dc07ed399c16d (diff)
Notes
Diffstat (limited to 'contrib/llvm/lib/Object/COFFObjectFile.cpp')
-rw-r--r--contrib/llvm/lib/Object/COFFObjectFile.cpp1725
1 files changed, 0 insertions, 1725 deletions
diff --git a/contrib/llvm/lib/Object/COFFObjectFile.cpp b/contrib/llvm/lib/Object/COFFObjectFile.cpp
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index 854664e679df..000000000000
--- a/contrib/llvm/lib/Object/COFFObjectFile.cpp
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@@ -1,1725 +0,0 @@
-//===- 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/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 <cstddef>
-#include <cstdint>
-#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 std::error_code getObject(const T *&Obj, MemoryBufferRef M,
- const void *Ptr,
- const uint64_t Size = sizeof(T)) {
- uintptr_t Addr = uintptr_t(Ptr);
- if (std::error_code EC = Binary::checkOffset(M, Addr, Size))
- return EC;
- Obj = reinterpret_cast<const T *>(Addr);
- return std::error_code();
-}
-
-// 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, uintptr_t(Addr), sizeof(*Addr)));
-#ifndef NDEBUG
- // Verify that the symbol points to a valid entry in the symbol table.
- uintptr_t Offset = uintptr_t(Addr) - 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 = 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;
-}
-
-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 {
- COFFSymbolRef Symb = getCOFFSymbol(Ref);
- StringRef Result;
- if (std::error_code EC = getSymbolName(Symb, Result))
- return errorCodeToError(EC);
- return Result;
-}
-
-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 = getSymbolValue(Ref);
- COFFSymbolRef Symb = getCOFFSymbol(Ref);
- int32_t SectionNumber = Symb.getSectionNumber();
-
- if (Symb.isAnyUndefined() || Symb.isCommon() ||
- COFF::isReservedSectionNumber(SectionNumber))
- return Result;
-
- const coff_section *Section = nullptr;
- if (std::error_code EC = getSection(SectionNumber, Section))
- return errorCodeToError(EC);
- 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;
-}
-
-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();
- const coff_section *Sec = nullptr;
- if (std::error_code EC = getSection(Symb.getSectionNumber(), Sec))
- return errorCodeToError(EC);
- 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;
-}
-
-unsigned COFFObjectFile::getSectionID(SectionRef Sec) const {
- uintptr_t Offset =
- uintptr_t(Sec.getRawDataRefImpl().p) - 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 (getObject(FirstReloc, M, reinterpret_cast<const coff_relocation*>(
- base + Sec->PointerToRelocations)))
- 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 (Binary::checkOffset(M, uintptr_t(begin),
- sizeof(coff_relocation) * NumRelocs))
- 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.
-std::error_code COFFObjectFile::initSymbolTablePtr() {
- if (COFFHeader)
- if (std::error_code EC = getObject(
- SymbolTable16, Data, base() + getPointerToSymbolTable(),
- (uint64_t)getNumberOfSymbols() * getSymbolTableEntrySize()))
- return EC;
-
- if (COFFBigObjHeader)
- if (std::error_code EC = getObject(
- SymbolTable32, Data, base() + getPointerToSymbolTable(),
- (uint64_t)getNumberOfSymbols() * getSymbolTableEntrySize()))
- return EC;
-
- // 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 (std::error_code EC = getObject(StringTableSizePtr, Data, StringTableAddr))
- return EC;
- StringTableSize = *StringTableSizePtr;
- if (std::error_code EC =
- getObject(StringTable, Data, StringTableAddr, StringTableSize))
- return EC;
-
- // 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 object_error::parse_failed;
- return std::error_code();
-}
-
-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.
-std::error_code 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.
-std::error_code 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 = uintptr_t(base()) + Section->PointerToRawData + Offset;
- return std::error_code();
- }
- }
- return object_error::parse_failed;
-}
-
-std::error_code
-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 =
- uintptr_t(base()) + Section->PointerToRawData + OffsetIntoSection;
- Contents =
- ArrayRef<uint8_t>(reinterpret_cast<const uint8_t *>(Begin), Size);
- return std::error_code();
- }
- }
- return object_error::parse_failed;
-}
-
-// Returns hint and name fields, assuming \p Rva is pointing to a Hint/Name
-// table entry.
-std::error_code COFFObjectFile::getHintName(uint32_t Rva, uint16_t &Hint,
- StringRef &Name) const {
- uintptr_t IntPtr = 0;
- if (std::error_code EC = getRvaPtr(Rva, IntPtr))
- return EC;
- 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 std::error_code();
-}
-
-std::error_code
-COFFObjectFile::getDebugPDBInfo(const debug_directory *DebugDir,
- const codeview::DebugInfo *&PDBInfo,
- StringRef &PDBFileName) const {
- ArrayRef<uint8_t> InfoBytes;
- if (std::error_code EC = getRvaAndSizeAsBytes(
- DebugDir->AddressOfRawData, DebugDir->SizeOfData, InfoBytes))
- return EC;
- if (InfoBytes.size() < sizeof(*PDBInfo) + 1)
- return 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 std::error_code();
-}
-
-std::error_code
-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 std::error_code();
-}
-
-// Find the import table.
-std::error_code 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;
- if (getDataDirectory(COFF::IMPORT_TABLE, DataEntry))
- return std::error_code();
-
- // Do nothing if the pointer to import table is NULL.
- if (DataEntry->RelativeVirtualAddress == 0)
- return std::error_code();
-
- 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 (std::error_code EC = getRvaPtr(ImportTableRva, IntPtr))
- return EC;
- if (std::error_code EC = checkOffset(Data, IntPtr, DataEntry->Size))
- return EC;
- ImportDirectory = reinterpret_cast<
- const coff_import_directory_table_entry *>(IntPtr);
- return std::error_code();
-}
-
-// Initializes DelayImportDirectory and NumberOfDelayImportDirectory.
-std::error_code COFFObjectFile::initDelayImportTablePtr() {
- const data_directory *DataEntry;
- if (getDataDirectory(COFF::DELAY_IMPORT_DESCRIPTOR, DataEntry))
- return std::error_code();
- if (DataEntry->RelativeVirtualAddress == 0)
- return std::error_code();
-
- uint32_t RVA = DataEntry->RelativeVirtualAddress;
- NumberOfDelayImportDirectory = DataEntry->Size /
- sizeof(delay_import_directory_table_entry) - 1;
-
- uintptr_t IntPtr = 0;
- if (std::error_code EC = getRvaPtr(RVA, IntPtr))
- return EC;
- DelayImportDirectory = reinterpret_cast<
- const delay_import_directory_table_entry *>(IntPtr);
- return std::error_code();
-}
-
-// Find the export table.
-std::error_code 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;
- if (getDataDirectory(COFF::EXPORT_TABLE, DataEntry))
- return std::error_code();
-
- // Do nothing if the pointer to export table is NULL.
- if (DataEntry->RelativeVirtualAddress == 0)
- return std::error_code();
-
- uint32_t ExportTableRva = DataEntry->RelativeVirtualAddress;
- uintptr_t IntPtr = 0;
- if (std::error_code EC = getRvaPtr(ExportTableRva, IntPtr))
- return EC;
- ExportDirectory =
- reinterpret_cast<const export_directory_table_entry *>(IntPtr);
- return std::error_code();
-}
-
-std::error_code COFFObjectFile::initBaseRelocPtr() {
- const data_directory *DataEntry;
- if (getDataDirectory(COFF::BASE_RELOCATION_TABLE, DataEntry))
- return std::error_code();
- if (DataEntry->RelativeVirtualAddress == 0)
- return std::error_code();
-
- uintptr_t IntPtr = 0;
- if (std::error_code EC = getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr))
- return EC;
- 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 std::error_code();
-}
-
-std::error_code COFFObjectFile::initDebugDirectoryPtr() {
- // Get the RVA of the debug directory. Do nothing if it does not exist.
- const data_directory *DataEntry;
- if (getDataDirectory(COFF::DEBUG_DIRECTORY, DataEntry))
- return std::error_code();
-
- // Do nothing if the RVA is NULL.
- if (DataEntry->RelativeVirtualAddress == 0)
- return std::error_code();
-
- // Check that the size is a multiple of the entry size.
- if (DataEntry->Size % sizeof(debug_directory) != 0)
- return object_error::parse_failed;
-
- uintptr_t IntPtr = 0;
- if (std::error_code EC = getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr))
- return EC;
- 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 std::error_code();
-}
-
-std::error_code COFFObjectFile::initLoadConfigPtr() {
- // Get the RVA of the debug directory. Do nothing if it does not exist.
- const data_directory *DataEntry;
- if (getDataDirectory(COFF::LOAD_CONFIG_TABLE, DataEntry))
- return std::error_code();
-
- // Do nothing if the RVA is NULL.
- if (DataEntry->RelativeVirtualAddress == 0)
- return std::error_code();
- uintptr_t IntPtr = 0;
- if (std::error_code EC = getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr))
- return EC;
-
- LoadConfig = (const void *)IntPtr;
- return std::error_code();
-}
-
-COFFObjectFile::COFFObjectFile(MemoryBufferRef Object, std::error_code &EC)
- : 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) {
- // Check that we at least have enough room for a header.
- if (!checkSize(Data, EC, sizeof(coff_file_header)))
- return;
-
- // 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) {
- EC = object_error::parse_failed;
- return;
- }
- CurPtr += sizeof(COFF::PEMagic); // Skip the PE magic bytes.
- HasPEHeader = true;
- }
- }
-
- if ((EC = getObject(COFFHeader, Data, base() + CurPtr)))
- return;
-
- // 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 ((EC = getObject(COFFBigObjHeader, Data, base() + CurPtr)))
- return;
-
- // 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;
- }
-
- if (HasPEHeader) {
- const pe32_header *Header;
- if ((EC = getObject(Header, Data, base() + CurPtr)))
- return;
-
- 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+.
- EC = object_error::parse_failed;
- return;
- }
- if ((EC = getObject(DataDirectory, Data, DataDirAddr, DataDirSize)))
- return;
- }
-
- if (COFFHeader)
- CurPtr += COFFHeader->SizeOfOptionalHeader;
-
- if ((EC = getObject(SectionTable, Data, base() + CurPtr,
- (uint64_t)getNumberOfSections() * sizeof(coff_section))))
- return;
-
- // Initialize the pointer to the symbol table.
- if (getPointerToSymbolTable() != 0) {
- if ((EC = initSymbolTablePtr())) {
- 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) {
- EC = object_error::parse_failed;
- return;
- }
- }
-
- // Initialize the pointer to the beginning of the import table.
- if ((EC = initImportTablePtr()))
- return;
- if ((EC = initDelayImportTablePtr()))
- return;
-
- // Initialize the pointer to the export table.
- if ((EC = initExportTablePtr()))
- return;
-
- // Initialize the pointer to the base relocation table.
- if ((EC = initBaseRelocPtr()))
- return;
-
- // Initialize the pointer to the export table.
- if ((EC = initDebugDirectoryPtr()))
- return;
-
- if ((EC = initLoadConfigPtr()))
- return;
-
- EC = std::error_code();
-}
-
-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());
-}
-
-std::error_code
-COFFObjectFile::getCOFFHeader(const coff_file_header *&Res) const {
- Res = COFFHeader;
- return std::error_code();
-}
-
-std::error_code
-COFFObjectFile::getCOFFBigObjHeader(const coff_bigobj_file_header *&Res) const {
- Res = COFFBigObjHeader;
- return std::error_code();
-}
-
-std::error_code COFFObjectFile::getPE32Header(const pe32_header *&Res) const {
- Res = PE32Header;
- return std::error_code();
-}
-
-std::error_code
-COFFObjectFile::getPE32PlusHeader(const pe32plus_header *&Res) const {
- Res = PE32PlusHeader;
- return std::error_code();
-}
-
-std::error_code
-COFFObjectFile::getDataDirectory(uint32_t Index,
- const data_directory *&Res) const {
- // Error if there's no data directory or the index is out of range.
- if (!DataDirectory) {
- Res = nullptr;
- return object_error::parse_failed;
- }
- assert(PE32Header || PE32PlusHeader);
- uint32_t NumEnt = PE32Header ? PE32Header->NumberOfRvaAndSize
- : PE32PlusHeader->NumberOfRvaAndSize;
- if (Index >= NumEnt) {
- Res = nullptr;
- return object_error::parse_failed;
- }
- Res = &DataDirectory[Index];
- return std::error_code();
-}
-
-std::error_code COFFObjectFile::getSection(int32_t Index,
- const coff_section *&Result) const {
- Result = nullptr;
- if (COFF::isReservedSectionNumber(Index))
- return std::error_code();
- if (static_cast<uint32_t>(Index) <= getNumberOfSections()) {
- // We already verified the section table data, so no need to check again.
- Result = SectionTable + (Index - 1);
- return std::error_code();
- }
- return object_error::parse_failed;
-}
-
-std::error_code COFFObjectFile::getSection(StringRef SectionName,
- const coff_section *&Result) const {
- Result = nullptr;
- StringRef SecName;
- for (const SectionRef &Section : sections()) {
- if (std::error_code E = Section.getName(SecName))
- return E;
- if (SecName == SectionName) {
- Result = getCOFFSection(Section);
- return std::error_code();
- }
- }
- return object_error::parse_failed;
-}
-
-std::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 std::error_code();
-}
-
-std::error_code COFFObjectFile::getSymbolName(COFFSymbolRef Symbol,
- StringRef &Res) const {
- return getSymbolName(Symbol.getGeneric(), Res);
-}
-
-std::error_code COFFObjectFile::getSymbolName(const coff_symbol_generic *Symbol,
- StringRef &Res) const {
- // Check for string table entry. First 4 bytes are 0.
- if (Symbol->Name.Offset.Zeroes == 0) {
- if (std::error_code EC = getString(Symbol->Name.Offset.Offset, Res))
- return EC;
- return std::error_code();
- }
-
- if (Symbol->Name.ShortName[COFF::NameSize - 1] == 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, COFF::NameSize);
- return std::error_code();
-}
-
-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,
- "inalid section name");
- } else {
- if (Name.substr(1).getAsInteger(10, Offset))
- return createStringError(object_error::parse_failed,
- "invalid section name");
- }
- if (std::error_code EC = getString(Offset, Name))
- return errorCodeToError(EC);
- }
-
- 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 = uintptr_t(base()) + Sec->PointerToRawData;
- uint32_t SectionSize = getSectionSize(Sec);
- if (checkOffset(Data, ConStart, SectionSize))
- return make_error<BinaryError>();
- 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;
- }
-}
-
-std::error_code 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;
- Object->getRvaPtr(RVA, IntPtr);
- return makeImportedSymbolIterator(Object, IntPtr, 0);
-}
-
-static imported_symbol_iterator
-importedSymbolEnd(uint32_t RVA, const COFFObjectFile *Object) {
- uintptr_t IntPtr = 0;
- 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());
-}
-
-std::error_code ImportDirectoryEntryRef::getName(StringRef &Result) const {
- uintptr_t IntPtr = 0;
- if (std::error_code EC =
- OwningObject->getRvaPtr(ImportTable[Index].NameRVA, IntPtr))
- return EC;
- Result = StringRef(reinterpret_cast<const char *>(IntPtr));
- return std::error_code();
-}
-
-std::error_code
-ImportDirectoryEntryRef::getImportLookupTableRVA(uint32_t &Result) const {
- Result = ImportTable[Index].ImportLookupTableRVA;
- return std::error_code();
-}
-
-std::error_code
-ImportDirectoryEntryRef::getImportAddressTableRVA(uint32_t &Result) const {
- Result = ImportTable[Index].ImportAddressTableRVA;
- return std::error_code();
-}
-
-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());
-}
-
-std::error_code DelayImportDirectoryEntryRef::getName(StringRef &Result) const {
- uintptr_t IntPtr = 0;
- if (std::error_code EC = OwningObject->getRvaPtr(Table[Index].Name, IntPtr))
- return EC;
- Result = StringRef(reinterpret_cast<const char *>(IntPtr));
- return std::error_code();
-}
-
-std::error_code DelayImportDirectoryEntryRef::
-getDelayImportTable(const delay_import_directory_table_entry *&Result) const {
- Result = &Table[Index];
- return std::error_code();
-}
-
-std::error_code DelayImportDirectoryEntryRef::
-getImportAddress(int AddrIndex, uint64_t &Result) const {
- uint32_t RVA = Table[Index].DelayImportAddressTable +
- AddrIndex * (OwningObject->is64() ? 8 : 4);
- uintptr_t IntPtr = 0;
- if (std::error_code EC = OwningObject->getRvaPtr(RVA, IntPtr))
- return EC;
- if (OwningObject->is64())
- Result = *reinterpret_cast<const ulittle64_t *>(IntPtr);
- else
- Result = *reinterpret_cast<const ulittle32_t *>(IntPtr);
- return std::error_code();
-}
-
-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.
-std::error_code ExportDirectoryEntryRef::getDllName(StringRef &Result) const {
- uintptr_t IntPtr = 0;
- if (std::error_code EC =
- OwningObject->getRvaPtr(ExportTable->NameRVA, IntPtr))
- return EC;
- Result = StringRef(reinterpret_cast<const char *>(IntPtr));
- return std::error_code();
-}
-
-// Returns the starting ordinal number.
-std::error_code
-ExportDirectoryEntryRef::getOrdinalBase(uint32_t &Result) const {
- Result = ExportTable->OrdinalBase;
- return std::error_code();
-}
-
-// Returns the export ordinal of the current export symbol.
-std::error_code ExportDirectoryEntryRef::getOrdinal(uint32_t &Result) const {
- Result = ExportTable->OrdinalBase + Index;
- return std::error_code();
-}
-
-// Returns the address of the current export symbol.
-std::error_code ExportDirectoryEntryRef::getExportRVA(uint32_t &Result) const {
- uintptr_t IntPtr = 0;
- if (std::error_code 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 std::error_code();
-}
-
-// Returns the name of the current export symbol. If the symbol is exported only
-// by ordinal, the empty string is set as a result.
-std::error_code
-ExportDirectoryEntryRef::getSymbolName(StringRef &Result) const {
- uintptr_t IntPtr = 0;
- if (std::error_code 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 (std::error_code EC =
- OwningObject->getRvaPtr(ExportTable->NamePointerRVA, IntPtr))
- return EC;
- const ulittle32_t *NamePtr = reinterpret_cast<const ulittle32_t *>(IntPtr);
- if (std::error_code EC = OwningObject->getRvaPtr(NamePtr[Offset], IntPtr))
- return EC;
- Result = StringRef(reinterpret_cast<const char *>(IntPtr));
- return std::error_code();
- }
- Result = "";
- return std::error_code();
-}
-
-std::error_code ExportDirectoryEntryRef::isForwarder(bool &Result) const {
- const data_directory *DataEntry;
- if (auto EC = OwningObject->getDataDirectory(COFF::EXPORT_TABLE, DataEntry))
- return EC;
- 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 std::error_code();
-}
-
-std::error_code 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 std::error_code();
-}
-
-bool ImportedSymbolRef::
-operator==(const ImportedSymbolRef &Other) const {
- return Entry32 == Other.Entry32 && Entry64 == Other.Entry64
- && Index == Other.Index;
-}
-
-void ImportedSymbolRef::moveNext() {
- ++Index;
-}
-
-std::error_code
-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 std::error_code();
- RVA = Entry32[Index].getHintNameRVA();
- } else {
- if (Entry64[Index].isOrdinal())
- return std::error_code();
- RVA = Entry64[Index].getHintNameRVA();
- }
- uintptr_t IntPtr = 0;
- if (std::error_code EC = OwningObject->getRvaPtr(RVA, IntPtr))
- return EC;
- // +2 because the first two bytes is hint.
- Result = StringRef(reinterpret_cast<const char *>(IntPtr + 2));
- return std::error_code();
-}
-
-std::error_code ImportedSymbolRef::isOrdinal(bool &Result) const {
- if (Entry32)
- Result = Entry32[Index].isOrdinal();
- else
- Result = Entry64[Index].isOrdinal();
- return std::error_code();
-}
-
-std::error_code ImportedSymbolRef::getHintNameRVA(uint32_t &Result) const {
- if (Entry32)
- Result = Entry32[Index].getHintNameRVA();
- else
- Result = Entry64[Index].getHintNameRVA();
- return std::error_code();
-}
-
-std::error_code ImportedSymbolRef::getOrdinal(uint16_t &Result) const {
- uint32_t RVA;
- if (Entry32) {
- if (Entry32[Index].isOrdinal()) {
- Result = Entry32[Index].getOrdinal();
- return std::error_code();
- }
- RVA = Entry32[Index].getHintNameRVA();
- } else {
- if (Entry64[Index].isOrdinal()) {
- Result = Entry64[Index].getOrdinal();
- return std::error_code();
- }
- RVA = Entry64[Index].getHintNameRVA();
- }
- uintptr_t IntPtr = 0;
- if (std::error_code EC = OwningObject->getRvaPtr(RVA, IntPtr))
- return EC;
- Result = *reinterpret_cast<const ulittle16_t *>(IntPtr);
- return std::error_code();
-}
-
-Expected<std::unique_ptr<COFFObjectFile>>
-ObjectFile::createCOFFObjectFile(MemoryBufferRef Object) {
- std::error_code EC;
- std::unique_ptr<COFFObjectFile> Ret(new COFFObjectFile(Object, EC));
- if (EC)
- return errorCodeToError(EC);
- return std::move(Ret);
-}
-
-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;
- }
-}
-
-std::error_code BaseRelocRef::getType(uint8_t &Type) const {
- auto *Entry = reinterpret_cast<const coff_base_reloc_block_entry *>(Header + 1);
- Type = Entry[Index].getType();
- return std::error_code();
-}
-
-std::error_code 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 std::error_code();
-}
-
-#define RETURN_IF_ERROR(E) \
- if (E) \
- return E;
-
-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_table &>
-ResourceSectionRef::getEntrySubDir(const coff_resource_dir_entry &Entry) {
- return getTableAtOffset(Entry.Offset.value());
-}
-
-Expected<const coff_resource_dir_table &> ResourceSectionRef::getBaseTable() {
- return getTableAtOffset(0);
-}