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llvm-for-llvmta/include/llvm/Object/COFF.h

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2022-04-25 10:02:23 +02:00
//===- COFF.h - COFF object file implementation -----------------*- C++ -*-===//
//
// 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.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_OBJECT_COFF_H
#define LLVM_OBJECT_COFF_H
#include "llvm/ADT/iterator_range.h"
#include "llvm/BinaryFormat/COFF.h"
#include "llvm/MC/SubtargetFeature.h"
#include "llvm/Object/Binary.h"
#include "llvm/Object/CVDebugRecord.h"
#include "llvm/Object/Error.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/BinaryByteStream.h"
#include "llvm/Support/ConvertUTF.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/ErrorHandling.h"
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <system_error>
namespace llvm {
template <typename T> class ArrayRef;
namespace object {
class BaseRelocRef;
class DelayImportDirectoryEntryRef;
class ExportDirectoryEntryRef;
class ImportDirectoryEntryRef;
class ImportedSymbolRef;
class ResourceSectionRef;
using import_directory_iterator = content_iterator<ImportDirectoryEntryRef>;
using delay_import_directory_iterator =
content_iterator<DelayImportDirectoryEntryRef>;
using export_directory_iterator = content_iterator<ExportDirectoryEntryRef>;
using imported_symbol_iterator = content_iterator<ImportedSymbolRef>;
using base_reloc_iterator = content_iterator<BaseRelocRef>;
/// The DOS compatible header at the front of all PE/COFF executables.
struct dos_header {
char Magic[2];
support::ulittle16_t UsedBytesInTheLastPage;
support::ulittle16_t FileSizeInPages;
support::ulittle16_t NumberOfRelocationItems;
support::ulittle16_t HeaderSizeInParagraphs;
support::ulittle16_t MinimumExtraParagraphs;
support::ulittle16_t MaximumExtraParagraphs;
support::ulittle16_t InitialRelativeSS;
support::ulittle16_t InitialSP;
support::ulittle16_t Checksum;
support::ulittle16_t InitialIP;
support::ulittle16_t InitialRelativeCS;
support::ulittle16_t AddressOfRelocationTable;
support::ulittle16_t OverlayNumber;
support::ulittle16_t Reserved[4];
support::ulittle16_t OEMid;
support::ulittle16_t OEMinfo;
support::ulittle16_t Reserved2[10];
support::ulittle32_t AddressOfNewExeHeader;
};
struct coff_file_header {
support::ulittle16_t Machine;
support::ulittle16_t NumberOfSections;
support::ulittle32_t TimeDateStamp;
support::ulittle32_t PointerToSymbolTable;
support::ulittle32_t NumberOfSymbols;
support::ulittle16_t SizeOfOptionalHeader;
support::ulittle16_t Characteristics;
bool isImportLibrary() const { return NumberOfSections == 0xffff; }
};
struct coff_bigobj_file_header {
support::ulittle16_t Sig1;
support::ulittle16_t Sig2;
support::ulittle16_t Version;
support::ulittle16_t Machine;
support::ulittle32_t TimeDateStamp;
uint8_t UUID[16];
support::ulittle32_t unused1;
support::ulittle32_t unused2;
support::ulittle32_t unused3;
support::ulittle32_t unused4;
support::ulittle32_t NumberOfSections;
support::ulittle32_t PointerToSymbolTable;
support::ulittle32_t NumberOfSymbols;
};
/// The 32-bit PE header that follows the COFF header.
struct pe32_header {
support::ulittle16_t Magic;
uint8_t MajorLinkerVersion;
uint8_t MinorLinkerVersion;
support::ulittle32_t SizeOfCode;
support::ulittle32_t SizeOfInitializedData;
support::ulittle32_t SizeOfUninitializedData;
support::ulittle32_t AddressOfEntryPoint;
support::ulittle32_t BaseOfCode;
support::ulittle32_t BaseOfData;
support::ulittle32_t ImageBase;
support::ulittle32_t SectionAlignment;
support::ulittle32_t FileAlignment;
support::ulittle16_t MajorOperatingSystemVersion;
support::ulittle16_t MinorOperatingSystemVersion;
support::ulittle16_t MajorImageVersion;
support::ulittle16_t MinorImageVersion;
support::ulittle16_t MajorSubsystemVersion;
support::ulittle16_t MinorSubsystemVersion;
support::ulittle32_t Win32VersionValue;
support::ulittle32_t SizeOfImage;
support::ulittle32_t SizeOfHeaders;
support::ulittle32_t CheckSum;
support::ulittle16_t Subsystem;
// FIXME: This should be DllCharacteristics.
support::ulittle16_t DLLCharacteristics;
support::ulittle32_t SizeOfStackReserve;
support::ulittle32_t SizeOfStackCommit;
support::ulittle32_t SizeOfHeapReserve;
support::ulittle32_t SizeOfHeapCommit;
support::ulittle32_t LoaderFlags;
// FIXME: This should be NumberOfRvaAndSizes.
support::ulittle32_t NumberOfRvaAndSize;
};
/// The 64-bit PE header that follows the COFF header.
struct pe32plus_header {
support::ulittle16_t Magic;
uint8_t MajorLinkerVersion;
uint8_t MinorLinkerVersion;
support::ulittle32_t SizeOfCode;
support::ulittle32_t SizeOfInitializedData;
support::ulittle32_t SizeOfUninitializedData;
support::ulittle32_t AddressOfEntryPoint;
support::ulittle32_t BaseOfCode;
support::ulittle64_t ImageBase;
support::ulittle32_t SectionAlignment;
support::ulittle32_t FileAlignment;
support::ulittle16_t MajorOperatingSystemVersion;
support::ulittle16_t MinorOperatingSystemVersion;
support::ulittle16_t MajorImageVersion;
support::ulittle16_t MinorImageVersion;
support::ulittle16_t MajorSubsystemVersion;
support::ulittle16_t MinorSubsystemVersion;
support::ulittle32_t Win32VersionValue;
support::ulittle32_t SizeOfImage;
support::ulittle32_t SizeOfHeaders;
support::ulittle32_t CheckSum;
support::ulittle16_t Subsystem;
support::ulittle16_t DLLCharacteristics;
support::ulittle64_t SizeOfStackReserve;
support::ulittle64_t SizeOfStackCommit;
support::ulittle64_t SizeOfHeapReserve;
support::ulittle64_t SizeOfHeapCommit;
support::ulittle32_t LoaderFlags;
support::ulittle32_t NumberOfRvaAndSize;
};
struct data_directory {
support::ulittle32_t RelativeVirtualAddress;
support::ulittle32_t Size;
};
struct debug_directory {
support::ulittle32_t Characteristics;
support::ulittle32_t TimeDateStamp;
support::ulittle16_t MajorVersion;
support::ulittle16_t MinorVersion;
support::ulittle32_t Type;
support::ulittle32_t SizeOfData;
support::ulittle32_t AddressOfRawData;
support::ulittle32_t PointerToRawData;
};
template <typename IntTy>
struct import_lookup_table_entry {
IntTy Data;
bool isOrdinal() const { return Data < 0; }
uint16_t getOrdinal() const {
assert(isOrdinal() && "ILT entry is not an ordinal!");
return Data & 0xFFFF;
}
uint32_t getHintNameRVA() const {
assert(!isOrdinal() && "ILT entry is not a Hint/Name RVA!");
return Data & 0xFFFFFFFF;
}
};
using import_lookup_table_entry32 =
import_lookup_table_entry<support::little32_t>;
using import_lookup_table_entry64 =
import_lookup_table_entry<support::little64_t>;
struct delay_import_directory_table_entry {
// dumpbin reports this field as "Characteristics" instead of "Attributes".
support::ulittle32_t Attributes;
support::ulittle32_t Name;
support::ulittle32_t ModuleHandle;
support::ulittle32_t DelayImportAddressTable;
support::ulittle32_t DelayImportNameTable;
support::ulittle32_t BoundDelayImportTable;
support::ulittle32_t UnloadDelayImportTable;
support::ulittle32_t TimeStamp;
};
struct export_directory_table_entry {
support::ulittle32_t ExportFlags;
support::ulittle32_t TimeDateStamp;
support::ulittle16_t MajorVersion;
support::ulittle16_t MinorVersion;
support::ulittle32_t NameRVA;
support::ulittle32_t OrdinalBase;
support::ulittle32_t AddressTableEntries;
support::ulittle32_t NumberOfNamePointers;
support::ulittle32_t ExportAddressTableRVA;
support::ulittle32_t NamePointerRVA;
support::ulittle32_t OrdinalTableRVA;
};
union export_address_table_entry {
support::ulittle32_t ExportRVA;
support::ulittle32_t ForwarderRVA;
};
using export_name_pointer_table_entry = support::ulittle32_t;
using export_ordinal_table_entry = support::ulittle16_t;
struct StringTableOffset {
support::ulittle32_t Zeroes;
support::ulittle32_t Offset;
};
template <typename SectionNumberType>
struct coff_symbol {
union {
char ShortName[COFF::NameSize];
StringTableOffset Offset;
} Name;
support::ulittle32_t Value;
SectionNumberType SectionNumber;
support::ulittle16_t Type;
uint8_t StorageClass;
uint8_t NumberOfAuxSymbols;
};
using coff_symbol16 = coff_symbol<support::ulittle16_t>;
using coff_symbol32 = coff_symbol<support::ulittle32_t>;
// Contains only common parts of coff_symbol16 and coff_symbol32.
struct coff_symbol_generic {
union {
char ShortName[COFF::NameSize];
StringTableOffset Offset;
} Name;
support::ulittle32_t Value;
};
struct coff_aux_section_definition;
struct coff_aux_weak_external;
class COFFSymbolRef {
public:
COFFSymbolRef() = default;
COFFSymbolRef(const coff_symbol16 *CS) : CS16(CS) {}
COFFSymbolRef(const coff_symbol32 *CS) : CS32(CS) {}
const void *getRawPtr() const {
return CS16 ? static_cast<const void *>(CS16) : CS32;
}
const coff_symbol_generic *getGeneric() const {
if (CS16)
return reinterpret_cast<const coff_symbol_generic *>(CS16);
return reinterpret_cast<const coff_symbol_generic *>(CS32);
}
friend bool operator<(COFFSymbolRef A, COFFSymbolRef B) {
return A.getRawPtr() < B.getRawPtr();
}
bool isBigObj() const {
if (CS16)
return false;
if (CS32)
return true;
llvm_unreachable("COFFSymbolRef points to nothing!");
}
const char *getShortName() const {
return CS16 ? CS16->Name.ShortName : CS32->Name.ShortName;
}
const StringTableOffset &getStringTableOffset() const {
assert(isSet() && "COFFSymbolRef points to nothing!");
return CS16 ? CS16->Name.Offset : CS32->Name.Offset;
}
uint32_t getValue() const {
assert(isSet() && "COFFSymbolRef points to nothing!");
return CS16 ? CS16->Value : CS32->Value;
}
int32_t getSectionNumber() const {
assert(isSet() && "COFFSymbolRef points to nothing!");
if (CS16) {
// Reserved sections are returned as negative numbers.
if (CS16->SectionNumber <= COFF::MaxNumberOfSections16)
return CS16->SectionNumber;
return static_cast<int16_t>(CS16->SectionNumber);
}
return static_cast<int32_t>(CS32->SectionNumber);
}
uint16_t getType() const {
assert(isSet() && "COFFSymbolRef points to nothing!");
return CS16 ? CS16->Type : CS32->Type;
}
uint8_t getStorageClass() const {
assert(isSet() && "COFFSymbolRef points to nothing!");
return CS16 ? CS16->StorageClass : CS32->StorageClass;
}
uint8_t getNumberOfAuxSymbols() const {
assert(isSet() && "COFFSymbolRef points to nothing!");
return CS16 ? CS16->NumberOfAuxSymbols : CS32->NumberOfAuxSymbols;
}
uint8_t getBaseType() const { return getType() & 0x0F; }
uint8_t getComplexType() const {
return (getType() & 0xF0) >> COFF::SCT_COMPLEX_TYPE_SHIFT;
}
template <typename T> const T *getAux() const {
return CS16 ? reinterpret_cast<const T *>(CS16 + 1)
: reinterpret_cast<const T *>(CS32 + 1);
}
const coff_aux_section_definition *getSectionDefinition() const {
if (!getNumberOfAuxSymbols() ||
getStorageClass() != COFF::IMAGE_SYM_CLASS_STATIC)
return nullptr;
return getAux<coff_aux_section_definition>();
}
const coff_aux_weak_external *getWeakExternal() const {
if (!getNumberOfAuxSymbols() ||
getStorageClass() != COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL)
return nullptr;
return getAux<coff_aux_weak_external>();
}
bool isAbsolute() const {
return getSectionNumber() == -1;
}
bool isExternal() const {
return getStorageClass() == COFF::IMAGE_SYM_CLASS_EXTERNAL;
}
bool isCommon() const {
return isExternal() && getSectionNumber() == COFF::IMAGE_SYM_UNDEFINED &&
getValue() != 0;
}
bool isUndefined() const {
return isExternal() && getSectionNumber() == COFF::IMAGE_SYM_UNDEFINED &&
getValue() == 0;
}
bool isWeakExternal() const {
return getStorageClass() == COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL;
}
bool isFunctionDefinition() const {
return isExternal() && getBaseType() == COFF::IMAGE_SYM_TYPE_NULL &&
getComplexType() == COFF::IMAGE_SYM_DTYPE_FUNCTION &&
!COFF::isReservedSectionNumber(getSectionNumber());
}
bool isFunctionLineInfo() const {
return getStorageClass() == COFF::IMAGE_SYM_CLASS_FUNCTION;
}
bool isAnyUndefined() const {
return isUndefined() || isWeakExternal();
}
bool isFileRecord() const {
return getStorageClass() == COFF::IMAGE_SYM_CLASS_FILE;
}
bool isSection() const {
return getStorageClass() == COFF::IMAGE_SYM_CLASS_SECTION;
}
bool isSectionDefinition() const {
// C++/CLI creates external ABS symbols for non-const appdomain globals.
// These are also followed by an auxiliary section definition.
bool isAppdomainGlobal =
getStorageClass() == COFF::IMAGE_SYM_CLASS_EXTERNAL &&
getSectionNumber() == COFF::IMAGE_SYM_ABSOLUTE;
bool isOrdinarySection = getStorageClass() == COFF::IMAGE_SYM_CLASS_STATIC;
if (!getNumberOfAuxSymbols())
return false;
return isAppdomainGlobal || isOrdinarySection;
}
bool isCLRToken() const {
return getStorageClass() == COFF::IMAGE_SYM_CLASS_CLR_TOKEN;
}
private:
bool isSet() const { return CS16 || CS32; }
const coff_symbol16 *CS16 = nullptr;
const coff_symbol32 *CS32 = nullptr;
};
struct coff_section {
char Name[COFF::NameSize];
support::ulittle32_t VirtualSize;
support::ulittle32_t VirtualAddress;
support::ulittle32_t SizeOfRawData;
support::ulittle32_t PointerToRawData;
support::ulittle32_t PointerToRelocations;
support::ulittle32_t PointerToLinenumbers;
support::ulittle16_t NumberOfRelocations;
support::ulittle16_t NumberOfLinenumbers;
support::ulittle32_t Characteristics;
// Returns true if the actual number of relocations is stored in
// VirtualAddress field of the first relocation table entry.
bool hasExtendedRelocations() const {
return (Characteristics & COFF::IMAGE_SCN_LNK_NRELOC_OVFL) &&
NumberOfRelocations == UINT16_MAX;
}
uint32_t getAlignment() const {
// The IMAGE_SCN_TYPE_NO_PAD bit is a legacy way of getting to
// IMAGE_SCN_ALIGN_1BYTES.
if (Characteristics & COFF::IMAGE_SCN_TYPE_NO_PAD)
return 1;
// Bit [20:24] contains section alignment. 0 means use a default alignment
// of 16.
uint32_t Shift = (Characteristics >> 20) & 0xF;
if (Shift > 0)
return 1U << (Shift - 1);
return 16;
}
};
struct coff_relocation {
support::ulittle32_t VirtualAddress;
support::ulittle32_t SymbolTableIndex;
support::ulittle16_t Type;
};
struct coff_aux_function_definition {
support::ulittle32_t TagIndex;
support::ulittle32_t TotalSize;
support::ulittle32_t PointerToLinenumber;
support::ulittle32_t PointerToNextFunction;
char Unused1[2];
};
static_assert(sizeof(coff_aux_function_definition) == 18,
"auxiliary entry must be 18 bytes");
struct coff_aux_bf_and_ef_symbol {
char Unused1[4];
support::ulittle16_t Linenumber;
char Unused2[6];
support::ulittle32_t PointerToNextFunction;
char Unused3[2];
};
static_assert(sizeof(coff_aux_bf_and_ef_symbol) == 18,
"auxiliary entry must be 18 bytes");
struct coff_aux_weak_external {
support::ulittle32_t TagIndex;
support::ulittle32_t Characteristics;
char Unused1[10];
};
static_assert(sizeof(coff_aux_weak_external) == 18,
"auxiliary entry must be 18 bytes");
struct coff_aux_section_definition {
support::ulittle32_t Length;
support::ulittle16_t NumberOfRelocations;
support::ulittle16_t NumberOfLinenumbers;
support::ulittle32_t CheckSum;
support::ulittle16_t NumberLowPart;
uint8_t Selection;
uint8_t Unused;
support::ulittle16_t NumberHighPart;
int32_t getNumber(bool IsBigObj) const {
uint32_t Number = static_cast<uint32_t>(NumberLowPart);
if (IsBigObj)
Number |= static_cast<uint32_t>(NumberHighPart) << 16;
return static_cast<int32_t>(Number);
}
};
static_assert(sizeof(coff_aux_section_definition) == 18,
"auxiliary entry must be 18 bytes");
struct coff_aux_clr_token {
uint8_t AuxType;
uint8_t Reserved;
support::ulittle32_t SymbolTableIndex;
char MBZ[12];
};
static_assert(sizeof(coff_aux_clr_token) == 18,
"auxiliary entry must be 18 bytes");
struct coff_import_header {
support::ulittle16_t Sig1;
support::ulittle16_t Sig2;
support::ulittle16_t Version;
support::ulittle16_t Machine;
support::ulittle32_t TimeDateStamp;
support::ulittle32_t SizeOfData;
support::ulittle16_t OrdinalHint;
support::ulittle16_t TypeInfo;
int getType() const { return TypeInfo & 0x3; }
int getNameType() const { return (TypeInfo >> 2) & 0x7; }
};
struct coff_import_directory_table_entry {
support::ulittle32_t ImportLookupTableRVA;
support::ulittle32_t TimeDateStamp;
support::ulittle32_t ForwarderChain;
support::ulittle32_t NameRVA;
support::ulittle32_t ImportAddressTableRVA;
bool isNull() const {
return ImportLookupTableRVA == 0 && TimeDateStamp == 0 &&
ForwarderChain == 0 && NameRVA == 0 && ImportAddressTableRVA == 0;
}
};
template <typename IntTy>
struct coff_tls_directory {
IntTy StartAddressOfRawData;
IntTy EndAddressOfRawData;
IntTy AddressOfIndex;
IntTy AddressOfCallBacks;
support::ulittle32_t SizeOfZeroFill;
support::ulittle32_t Characteristics;
uint32_t getAlignment() const {
// Bit [20:24] contains section alignment.
uint32_t Shift = (Characteristics & COFF::IMAGE_SCN_ALIGN_MASK) >> 20;
if (Shift > 0)
return 1U << (Shift - 1);
return 0;
}
void setAlignment(uint32_t Align) {
uint32_t AlignBits = 0;
if (Align) {
assert(llvm::isPowerOf2_32(Align) && "alignment is not a power of 2");
assert(llvm::Log2_32(Align) <= 13 && "alignment requested is too large");
AlignBits = (llvm::Log2_32(Align) + 1) << 20;
}
Characteristics =
(Characteristics & ~COFF::IMAGE_SCN_ALIGN_MASK) | AlignBits;
}
};
using coff_tls_directory32 = coff_tls_directory<support::little32_t>;
using coff_tls_directory64 = coff_tls_directory<support::little64_t>;
/// Bits in control flow guard flags as we understand them.
enum class coff_guard_flags : uint32_t {
CFInstrumented = 0x00000100,
HasFidTable = 0x00000400,
ProtectDelayLoadIAT = 0x00001000,
DelayLoadIATSection = 0x00002000, // Delay load in separate section
HasLongJmpTable = 0x00010000,
FidTableHasFlags = 0x10000000, // Indicates that fid tables are 5 bytes
};
enum class frame_type : uint16_t { Fpo = 0, Trap = 1, Tss = 2, NonFpo = 3 };
struct coff_load_config_code_integrity {
support::ulittle16_t Flags;
support::ulittle16_t Catalog;
support::ulittle32_t CatalogOffset;
support::ulittle32_t Reserved;
};
/// 32-bit load config (IMAGE_LOAD_CONFIG_DIRECTORY32)
struct coff_load_configuration32 {
support::ulittle32_t Size;
support::ulittle32_t TimeDateStamp;
support::ulittle16_t MajorVersion;
support::ulittle16_t MinorVersion;
support::ulittle32_t GlobalFlagsClear;
support::ulittle32_t GlobalFlagsSet;
support::ulittle32_t CriticalSectionDefaultTimeout;
support::ulittle32_t DeCommitFreeBlockThreshold;
support::ulittle32_t DeCommitTotalFreeThreshold;
support::ulittle32_t LockPrefixTable;
support::ulittle32_t MaximumAllocationSize;
support::ulittle32_t VirtualMemoryThreshold;
support::ulittle32_t ProcessAffinityMask;
support::ulittle32_t ProcessHeapFlags;
support::ulittle16_t CSDVersion;
support::ulittle16_t DependentLoadFlags;
support::ulittle32_t EditList;
support::ulittle32_t SecurityCookie;
support::ulittle32_t SEHandlerTable;
support::ulittle32_t SEHandlerCount;
// Added in MSVC 2015 for /guard:cf.
support::ulittle32_t GuardCFCheckFunction;
support::ulittle32_t GuardCFCheckDispatch;
support::ulittle32_t GuardCFFunctionTable;
support::ulittle32_t GuardCFFunctionCount;
support::ulittle32_t GuardFlags; // coff_guard_flags
// Added in MSVC 2017
coff_load_config_code_integrity CodeIntegrity;
support::ulittle32_t GuardAddressTakenIatEntryTable;
support::ulittle32_t GuardAddressTakenIatEntryCount;
support::ulittle32_t GuardLongJumpTargetTable;
support::ulittle32_t GuardLongJumpTargetCount;
support::ulittle32_t DynamicValueRelocTable;
support::ulittle32_t CHPEMetadataPointer;
support::ulittle32_t GuardRFFailureRoutine;
support::ulittle32_t GuardRFFailureRoutineFunctionPointer;
support::ulittle32_t DynamicValueRelocTableOffset;
support::ulittle16_t DynamicValueRelocTableSection;
support::ulittle16_t Reserved2;
support::ulittle32_t GuardRFVerifyStackPointerFunctionPointer;
support::ulittle32_t HotPatchTableOffset;
};
/// 64-bit load config (IMAGE_LOAD_CONFIG_DIRECTORY64)
struct coff_load_configuration64 {
support::ulittle32_t Size;
support::ulittle32_t TimeDateStamp;
support::ulittle16_t MajorVersion;
support::ulittle16_t MinorVersion;
support::ulittle32_t GlobalFlagsClear;
support::ulittle32_t GlobalFlagsSet;
support::ulittle32_t CriticalSectionDefaultTimeout;
support::ulittle64_t DeCommitFreeBlockThreshold;
support::ulittle64_t DeCommitTotalFreeThreshold;
support::ulittle64_t LockPrefixTable;
support::ulittle64_t MaximumAllocationSize;
support::ulittle64_t VirtualMemoryThreshold;
support::ulittle64_t ProcessAffinityMask;
support::ulittle32_t ProcessHeapFlags;
support::ulittle16_t CSDVersion;
support::ulittle16_t DependentLoadFlags;
support::ulittle64_t EditList;
support::ulittle64_t SecurityCookie;
support::ulittle64_t SEHandlerTable;
support::ulittle64_t SEHandlerCount;
// Added in MSVC 2015 for /guard:cf.
support::ulittle64_t GuardCFCheckFunction;
support::ulittle64_t GuardCFCheckDispatch;
support::ulittle64_t GuardCFFunctionTable;
support::ulittle64_t GuardCFFunctionCount;
support::ulittle32_t GuardFlags;
// Added in MSVC 2017
coff_load_config_code_integrity CodeIntegrity;
support::ulittle64_t GuardAddressTakenIatEntryTable;
support::ulittle64_t GuardAddressTakenIatEntryCount;
support::ulittle64_t GuardLongJumpTargetTable;
support::ulittle64_t GuardLongJumpTargetCount;
support::ulittle64_t DynamicValueRelocTable;
support::ulittle64_t CHPEMetadataPointer;
support::ulittle64_t GuardRFFailureRoutine;
support::ulittle64_t GuardRFFailureRoutineFunctionPointer;
support::ulittle32_t DynamicValueRelocTableOffset;
support::ulittle16_t DynamicValueRelocTableSection;
support::ulittle16_t Reserved2;
support::ulittle64_t GuardRFVerifyStackPointerFunctionPointer;
support::ulittle32_t HotPatchTableOffset;
};
struct coff_runtime_function_x64 {
support::ulittle32_t BeginAddress;
support::ulittle32_t EndAddress;
support::ulittle32_t UnwindInformation;
};
struct coff_base_reloc_block_header {
support::ulittle32_t PageRVA;
support::ulittle32_t BlockSize;
};
struct coff_base_reloc_block_entry {
support::ulittle16_t Data;
int getType() const { return Data >> 12; }
int getOffset() const { return Data & ((1 << 12) - 1); }
};
struct coff_resource_dir_entry {
union {
support::ulittle32_t NameOffset;
support::ulittle32_t ID;
uint32_t getNameOffset() const {
return maskTrailingOnes<uint32_t>(31) & NameOffset;
}
// Even though the PE/COFF spec doesn't mention this, the high bit of a name
// offset is set.
void setNameOffset(uint32_t Offset) { NameOffset = Offset | (1 << 31); }
} Identifier;
union {
support::ulittle32_t DataEntryOffset;
support::ulittle32_t SubdirOffset;
bool isSubDir() const { return SubdirOffset >> 31; }
uint32_t value() const {
return maskTrailingOnes<uint32_t>(31) & SubdirOffset;
}
} Offset;
};
struct coff_resource_data_entry {
support::ulittle32_t DataRVA;
support::ulittle32_t DataSize;
support::ulittle32_t Codepage;
support::ulittle32_t Reserved;
};
struct coff_resource_dir_table {
support::ulittle32_t Characteristics;
support::ulittle32_t TimeDateStamp;
support::ulittle16_t MajorVersion;
support::ulittle16_t MinorVersion;
support::ulittle16_t NumberOfNameEntries;
support::ulittle16_t NumberOfIDEntries;
};
struct debug_h_header {
support::ulittle32_t Magic;
support::ulittle16_t Version;
support::ulittle16_t HashAlgorithm;
};
class COFFObjectFile : public ObjectFile {
private:
COFFObjectFile(MemoryBufferRef Object);
friend class ImportDirectoryEntryRef;
friend class ExportDirectoryEntryRef;
const coff_file_header *COFFHeader;
const coff_bigobj_file_header *COFFBigObjHeader;
const pe32_header *PE32Header;
const pe32plus_header *PE32PlusHeader;
const data_directory *DataDirectory;
const coff_section *SectionTable;
const coff_symbol16 *SymbolTable16;
const coff_symbol32 *SymbolTable32;
const char *StringTable;
uint32_t StringTableSize;
const coff_import_directory_table_entry *ImportDirectory;
const delay_import_directory_table_entry *DelayImportDirectory;
uint32_t NumberOfDelayImportDirectory;
const export_directory_table_entry *ExportDirectory;
const coff_base_reloc_block_header *BaseRelocHeader;
const coff_base_reloc_block_header *BaseRelocEnd;
const debug_directory *DebugDirectoryBegin;
const debug_directory *DebugDirectoryEnd;
const coff_tls_directory32 *TLSDirectory32;
const coff_tls_directory64 *TLSDirectory64;
// Either coff_load_configuration32 or coff_load_configuration64.
const void *LoadConfig = nullptr;
Expected<StringRef> getString(uint32_t offset) const;
template <typename coff_symbol_type>
const coff_symbol_type *toSymb(DataRefImpl Symb) const;
const coff_section *toSec(DataRefImpl Sec) const;
const coff_relocation *toRel(DataRefImpl Rel) const;
// Finish initializing the object and return success or an error.
Error initialize();
Error initSymbolTablePtr();
Error initImportTablePtr();
Error initDelayImportTablePtr();
Error initExportTablePtr();
Error initBaseRelocPtr();
Error initDebugDirectoryPtr();
Error initTLSDirectoryPtr();
Error initLoadConfigPtr();
public:
static Expected<std::unique_ptr<COFFObjectFile>>
create(MemoryBufferRef Object);
uintptr_t getSymbolTable() const {
if (SymbolTable16)
return reinterpret_cast<uintptr_t>(SymbolTable16);
if (SymbolTable32)
return reinterpret_cast<uintptr_t>(SymbolTable32);
return uintptr_t(0);
}
uint16_t getMachine() const {
if (COFFHeader)
return COFFHeader->Machine;
if (COFFBigObjHeader)
return COFFBigObjHeader->Machine;
llvm_unreachable("no COFF header!");
}
uint16_t getSizeOfOptionalHeader() const {
if (COFFHeader)
return COFFHeader->isImportLibrary() ? 0
: COFFHeader->SizeOfOptionalHeader;
// bigobj doesn't have this field.
if (COFFBigObjHeader)
return 0;
llvm_unreachable("no COFF header!");
}
uint16_t getCharacteristics() const {
if (COFFHeader)
return COFFHeader->isImportLibrary() ? 0 : COFFHeader->Characteristics;
// bigobj doesn't have characteristics to speak of,
// editbin will silently lie to you if you attempt to set any.
if (COFFBigObjHeader)
return 0;
llvm_unreachable("no COFF header!");
}
uint32_t getTimeDateStamp() const {
if (COFFHeader)
return COFFHeader->TimeDateStamp;
if (COFFBigObjHeader)
return COFFBigObjHeader->TimeDateStamp;
llvm_unreachable("no COFF header!");
}
uint32_t getNumberOfSections() const {
if (COFFHeader)
return COFFHeader->isImportLibrary() ? 0 : COFFHeader->NumberOfSections;
if (COFFBigObjHeader)
return COFFBigObjHeader->NumberOfSections;
llvm_unreachable("no COFF header!");
}
uint32_t getPointerToSymbolTable() const {
if (COFFHeader)
return COFFHeader->isImportLibrary() ? 0
: COFFHeader->PointerToSymbolTable;
if (COFFBigObjHeader)
return COFFBigObjHeader->PointerToSymbolTable;
llvm_unreachable("no COFF header!");
}
uint32_t getRawNumberOfSymbols() const {
if (COFFHeader)
return COFFHeader->isImportLibrary() ? 0 : COFFHeader->NumberOfSymbols;
if (COFFBigObjHeader)
return COFFBigObjHeader->NumberOfSymbols;
llvm_unreachable("no COFF header!");
}
uint32_t getNumberOfSymbols() const {
if (!SymbolTable16 && !SymbolTable32)
return 0;
return getRawNumberOfSymbols();
}
uint32_t getStringTableSize() const { return StringTableSize; }
const coff_load_configuration32 *getLoadConfig32() const {
assert(!is64());
return reinterpret_cast<const coff_load_configuration32 *>(LoadConfig);
}
const coff_load_configuration64 *getLoadConfig64() const {
assert(is64());
return reinterpret_cast<const coff_load_configuration64 *>(LoadConfig);
}
StringRef getRelocationTypeName(uint16_t Type) const;
protected:
void moveSymbolNext(DataRefImpl &Symb) const override;
Expected<StringRef> getSymbolName(DataRefImpl Symb) const override;
Expected<uint64_t> getSymbolAddress(DataRefImpl Symb) const override;
uint32_t getSymbolAlignment(DataRefImpl Symb) const override;
uint64_t getSymbolValueImpl(DataRefImpl Symb) const override;
uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override;
Expected<uint32_t> getSymbolFlags(DataRefImpl Symb) const override;
Expected<SymbolRef::Type> getSymbolType(DataRefImpl Symb) const override;
Expected<section_iterator> getSymbolSection(DataRefImpl Symb) const override;
void moveSectionNext(DataRefImpl &Sec) const override;
Expected<StringRef> getSectionName(DataRefImpl Sec) const override;
uint64_t getSectionAddress(DataRefImpl Sec) const override;
uint64_t getSectionIndex(DataRefImpl Sec) const override;
uint64_t getSectionSize(DataRefImpl Sec) const override;
Expected<ArrayRef<uint8_t>>
getSectionContents(DataRefImpl Sec) const override;
uint64_t getSectionAlignment(DataRefImpl Sec) const override;
bool isSectionCompressed(DataRefImpl Sec) const override;
bool isSectionText(DataRefImpl Sec) const override;
bool isSectionData(DataRefImpl Sec) const override;
bool isSectionBSS(DataRefImpl Sec) const override;
bool isSectionVirtual(DataRefImpl Sec) const override;
bool isDebugSection(StringRef SectionName) const override;
relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
relocation_iterator section_rel_end(DataRefImpl Sec) const override;
void moveRelocationNext(DataRefImpl &Rel) const override;
uint64_t getRelocationOffset(DataRefImpl Rel) const override;
symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
uint64_t getRelocationType(DataRefImpl Rel) const override;
void getRelocationTypeName(DataRefImpl Rel,
SmallVectorImpl<char> &Result) const override;
public:
basic_symbol_iterator symbol_begin() const override;
basic_symbol_iterator symbol_end() const override;
section_iterator section_begin() const override;
section_iterator section_end() const override;
const coff_section *getCOFFSection(const SectionRef &Section) const;
COFFSymbolRef getCOFFSymbol(const DataRefImpl &Ref) const;
COFFSymbolRef getCOFFSymbol(const SymbolRef &Symbol) const;
const coff_relocation *getCOFFRelocation(const RelocationRef &Reloc) const;
unsigned getSectionID(SectionRef Sec) const;
unsigned getSymbolSectionID(SymbolRef Sym) const;
uint8_t getBytesInAddress() const override;
StringRef getFileFormatName() const override;
Triple::ArchType getArch() const override;
Expected<uint64_t> getStartAddress() const override;
SubtargetFeatures getFeatures() const override { return SubtargetFeatures(); }
import_directory_iterator import_directory_begin() const;
import_directory_iterator import_directory_end() const;
delay_import_directory_iterator delay_import_directory_begin() const;
delay_import_directory_iterator delay_import_directory_end() const;
export_directory_iterator export_directory_begin() const;
export_directory_iterator export_directory_end() const;
base_reloc_iterator base_reloc_begin() const;
base_reloc_iterator base_reloc_end() const;
const debug_directory *debug_directory_begin() const {
return DebugDirectoryBegin;
}
const debug_directory *debug_directory_end() const {
return DebugDirectoryEnd;
}
iterator_range<import_directory_iterator> import_directories() const;
iterator_range<delay_import_directory_iterator>
delay_import_directories() const;
iterator_range<export_directory_iterator> export_directories() const;
iterator_range<base_reloc_iterator> base_relocs() const;
iterator_range<const debug_directory *> debug_directories() const {
return make_range(debug_directory_begin(), debug_directory_end());
}
const coff_tls_directory32 *getTLSDirectory32() const {
return TLSDirectory32;
}
const coff_tls_directory64 *getTLSDirectory64() const {
return TLSDirectory64;
}
const dos_header *getDOSHeader() const {
if (!PE32Header && !PE32PlusHeader)
return nullptr;
return reinterpret_cast<const dos_header *>(base());
}
const coff_file_header *getCOFFHeader() const { return COFFHeader; }
const coff_bigobj_file_header *getCOFFBigObjHeader() const {
return COFFBigObjHeader;
}
const pe32_header *getPE32Header() const { return PE32Header; }
const pe32plus_header *getPE32PlusHeader() const { return PE32PlusHeader; }
const data_directory *getDataDirectory(uint32_t index) const;
Expected<const coff_section *> getSection(int32_t index) const;
Expected<COFFSymbolRef> getSymbol(uint32_t index) const {
if (index >= getNumberOfSymbols())
return errorCodeToError(object_error::parse_failed);
if (SymbolTable16)
return COFFSymbolRef(SymbolTable16 + index);
if (SymbolTable32)
return COFFSymbolRef(SymbolTable32 + index);
return errorCodeToError(object_error::parse_failed);
}
template <typename T>
Error getAuxSymbol(uint32_t index, const T *&Res) const {
Expected<COFFSymbolRef> S = getSymbol(index);
if (Error E = S.takeError())
return E;
Res = reinterpret_cast<const T *>(S->getRawPtr());
return Error::success();
}
Expected<StringRef> getSymbolName(COFFSymbolRef Symbol) const;
Expected<StringRef> getSymbolName(const coff_symbol_generic *Symbol) const;
ArrayRef<uint8_t> getSymbolAuxData(COFFSymbolRef Symbol) const;
uint32_t getSymbolIndex(COFFSymbolRef Symbol) const;
size_t getSymbolTableEntrySize() const {
if (COFFHeader)
return sizeof(coff_symbol16);
if (COFFBigObjHeader)
return sizeof(coff_symbol32);
llvm_unreachable("null symbol table pointer!");
}
ArrayRef<coff_relocation> getRelocations(const coff_section *Sec) const;
Expected<StringRef> getSectionName(const coff_section *Sec) const;
uint64_t getSectionSize(const coff_section *Sec) const;
Error getSectionContents(const coff_section *Sec,
ArrayRef<uint8_t> &Res) const;
uint64_t getImageBase() const;
Error getVaPtr(uint64_t VA, uintptr_t &Res) const;
Error getRvaPtr(uint32_t Rva, uintptr_t &Res) const;
/// Given an RVA base and size, returns a valid array of bytes or an error
/// code if the RVA and size is not contained completely within a valid
/// section.
Error getRvaAndSizeAsBytes(uint32_t RVA, uint32_t Size,
ArrayRef<uint8_t> &Contents) const;
Error getHintName(uint32_t Rva, uint16_t &Hint,
StringRef &Name) const;
/// Get PDB information out of a codeview debug directory entry.
Error getDebugPDBInfo(const debug_directory *DebugDir,
const codeview::DebugInfo *&Info,
StringRef &PDBFileName) const;
/// Get PDB information from an executable. If the information is not present,
/// Info will be set to nullptr and PDBFileName will be empty. An error is
/// returned only on corrupt object files. Convenience accessor that can be
/// used if the debug directory is not already handy.
Error getDebugPDBInfo(const codeview::DebugInfo *&Info,
StringRef &PDBFileName) const;
bool isRelocatableObject() const override;
bool is64() const { return PE32PlusHeader; }
StringRef mapDebugSectionName(StringRef Name) const override;
static bool classof(const Binary *v) { return v->isCOFF(); }
};
// The iterator for the import directory table.
class ImportDirectoryEntryRef {
public:
ImportDirectoryEntryRef() = default;
ImportDirectoryEntryRef(const coff_import_directory_table_entry *Table,
uint32_t I, const COFFObjectFile *Owner)
: ImportTable(Table), Index(I), OwningObject(Owner) {}
bool operator==(const ImportDirectoryEntryRef &Other) const;
void moveNext();
imported_symbol_iterator imported_symbol_begin() const;
imported_symbol_iterator imported_symbol_end() const;
iterator_range<imported_symbol_iterator> imported_symbols() const;
imported_symbol_iterator lookup_table_begin() const;
imported_symbol_iterator lookup_table_end() const;
iterator_range<imported_symbol_iterator> lookup_table_symbols() const;
Error getName(StringRef &Result) const;
Error getImportLookupTableRVA(uint32_t &Result) const;
Error getImportAddressTableRVA(uint32_t &Result) const;
Error
getImportTableEntry(const coff_import_directory_table_entry *&Result) const;
private:
const coff_import_directory_table_entry *ImportTable;
uint32_t Index;
const COFFObjectFile *OwningObject = nullptr;
};
class DelayImportDirectoryEntryRef {
public:
DelayImportDirectoryEntryRef() = default;
DelayImportDirectoryEntryRef(const delay_import_directory_table_entry *T,
uint32_t I, const COFFObjectFile *Owner)
: Table(T), Index(I), OwningObject(Owner) {}
bool operator==(const DelayImportDirectoryEntryRef &Other) const;
void moveNext();
imported_symbol_iterator imported_symbol_begin() const;
imported_symbol_iterator imported_symbol_end() const;
iterator_range<imported_symbol_iterator> imported_symbols() const;
Error getName(StringRef &Result) const;
Error getDelayImportTable(
const delay_import_directory_table_entry *&Result) const;
Error getImportAddress(int AddrIndex, uint64_t &Result) const;
private:
const delay_import_directory_table_entry *Table;
uint32_t Index;
const COFFObjectFile *OwningObject = nullptr;
};
// The iterator for the export directory table entry.
class ExportDirectoryEntryRef {
public:
ExportDirectoryEntryRef() = default;
ExportDirectoryEntryRef(const export_directory_table_entry *Table, uint32_t I,
const COFFObjectFile *Owner)
: ExportTable(Table), Index(I), OwningObject(Owner) {}
bool operator==(const ExportDirectoryEntryRef &Other) const;
void moveNext();
Error getDllName(StringRef &Result) const;
Error getOrdinalBase(uint32_t &Result) const;
Error getOrdinal(uint32_t &Result) const;
Error getExportRVA(uint32_t &Result) const;
Error getSymbolName(StringRef &Result) const;
Error isForwarder(bool &Result) const;
Error getForwardTo(StringRef &Result) const;
private:
const export_directory_table_entry *ExportTable;
uint32_t Index;
const COFFObjectFile *OwningObject = nullptr;
};
class ImportedSymbolRef {
public:
ImportedSymbolRef() = default;
ImportedSymbolRef(const import_lookup_table_entry32 *Entry, uint32_t I,
const COFFObjectFile *Owner)
: Entry32(Entry), Entry64(nullptr), Index(I), OwningObject(Owner) {}
ImportedSymbolRef(const import_lookup_table_entry64 *Entry, uint32_t I,
const COFFObjectFile *Owner)
: Entry32(nullptr), Entry64(Entry), Index(I), OwningObject(Owner) {}
bool operator==(const ImportedSymbolRef &Other) const;
void moveNext();
Error getSymbolName(StringRef &Result) const;
Error isOrdinal(bool &Result) const;
Error getOrdinal(uint16_t &Result) const;
Error getHintNameRVA(uint32_t &Result) const;
private:
const import_lookup_table_entry32 *Entry32;
const import_lookup_table_entry64 *Entry64;
uint32_t Index;
const COFFObjectFile *OwningObject = nullptr;
};
class BaseRelocRef {
public:
BaseRelocRef() = default;
BaseRelocRef(const coff_base_reloc_block_header *Header,
const COFFObjectFile *Owner)
: Header(Header), Index(0) {}
bool operator==(const BaseRelocRef &Other) const;
void moveNext();
Error getType(uint8_t &Type) const;
Error getRVA(uint32_t &Result) const;
private:
const coff_base_reloc_block_header *Header;
uint32_t Index;
};
class ResourceSectionRef {
public:
ResourceSectionRef() = default;
explicit ResourceSectionRef(StringRef Ref) : BBS(Ref, support::little) {}
Error load(const COFFObjectFile *O);
Error load(const COFFObjectFile *O, const SectionRef &S);
Expected<ArrayRef<UTF16>>
getEntryNameString(const coff_resource_dir_entry &Entry);
Expected<const coff_resource_dir_table &>
getEntrySubDir(const coff_resource_dir_entry &Entry);
Expected<const coff_resource_data_entry &>
getEntryData(const coff_resource_dir_entry &Entry);
Expected<const coff_resource_dir_table &> getBaseTable();
Expected<const coff_resource_dir_entry &>
getTableEntry(const coff_resource_dir_table &Table, uint32_t Index);
Expected<StringRef> getContents(const coff_resource_data_entry &Entry);
private:
BinaryByteStream BBS;
SectionRef Section;
const COFFObjectFile *Obj;
std::vector<const coff_relocation *> Relocs;
Expected<const coff_resource_dir_table &> getTableAtOffset(uint32_t Offset);
Expected<const coff_resource_dir_entry &>
getTableEntryAtOffset(uint32_t Offset);
Expected<const coff_resource_data_entry &>
getDataEntryAtOffset(uint32_t Offset);
Expected<ArrayRef<UTF16>> getDirStringAtOffset(uint32_t Offset);
};
// Corresponds to `_FPO_DATA` structure in the PE/COFF spec.
struct FpoData {
support::ulittle32_t Offset; // ulOffStart: Offset 1st byte of function code
support::ulittle32_t Size; // cbProcSize: # bytes in function
support::ulittle32_t NumLocals; // cdwLocals: # bytes in locals/4
support::ulittle16_t NumParams; // cdwParams: # bytes in params/4
support::ulittle16_t Attributes;
// cbProlog: # bytes in prolog
int getPrologSize() const { return Attributes & 0xF; }
// cbRegs: # regs saved
int getNumSavedRegs() const { return (Attributes >> 8) & 0x7; }
// fHasSEH: true if seh is func
bool hasSEH() const { return (Attributes >> 9) & 1; }
// fUseBP: true if EBP has been allocated
bool useBP() const { return (Attributes >> 10) & 1; }
// cbFrame: frame pointer
frame_type getFP() const { return static_cast<frame_type>(Attributes >> 14); }
};
} // end namespace object
} // end namespace llvm
#endif // LLVM_OBJECT_COFF_H