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llvm-mirror/include/llvm/Object/COFF.h
Kevin Enderby 1a15e5c9c5 Fix a crash in running llvm-objdump -t with an invalid Mach-O file already 
in the test suite. While this is not really an interesting tool and option to run
on a Mach-O file to show the symbol table in a generic libObject format
it shouldn’t crash.

The reason for the crash was in MachOObjectFile::getSymbolType() when it was
calling MachOObjectFile::getSymbolSection() without checking its return value
for the error case.

What makes this fix require a fair bit of diffs is that the method getSymbolType() is
in the class ObjectFile defined without an ErrorOr<> so I needed to add that all
the sub classes.  And all of the uses needed to be updated and the return value
needed to be checked for the error case.

The MachOObjectFile version of getSymbolType() “can” get an error in trying to
come up with the libObject’s internal SymbolRef::Type when the Mach-O symbol
symbol type is an N_SECT type because the code is trying to select from the
SymbolRef::ST_Data or SymbolRef::ST_Function values for the SymbolRef::Type.
And it needs the Mach-O section to use isData() and isBSS to determine if
it will return SymbolRef::ST_Data.

One other possible fix I considered is to simply return SymbolRef::ST_Other
when MachOObjectFile::getSymbolSection() returned an error.  But since in
the past when I did such changes that “ate an error in the libObject code” I
was asked instead to push the error out of the libObject code I chose not
to implement the fix this way.

As currently written both the COFF and ELF versions of getSymbolType()
can’t get an error.  But if isReservedSectionNumber() wanted to check for
the two known negative values rather than allowing all negative values or
the code wanted to add the same check as in getSymbolAddress() to use
getSection() and check for the error then these versions of getSymbolType()
could return errors.

At the end of the day the error printed now is the generic “Invalid data was
encountered while parsing the file” for object_error::parse_failed.  In the
future when we thread Lang’s new TypedError for recoverable error handling
though libObject this will improve.  And where the added // Diagnostic(…
comment is, it would be changed to produce and error message
like “bad section index (42) for symbol at index 8” for this case.

llvm-svn: 264187
2016-03-23 20:27:00 +00:00

948 lines
32 KiB
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//===- COFF.h - COFF object file implementation -----------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares the COFFObjectFile class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_OBJECT_COFF_H
#define LLVM_OBJECT_COFF_H
#include "llvm/ADT/PointerUnion.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/COFF.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/ErrorOr.h"
namespace llvm {
template <typename T> class ArrayRef;
namespace object {
class ImportDirectoryEntryRef;
class DelayImportDirectoryEntryRef;
class ExportDirectoryEntryRef;
class ImportedSymbolRef;
class BaseRelocRef;
typedef content_iterator<ImportDirectoryEntryRef> import_directory_iterator;
typedef content_iterator<DelayImportDirectoryEntryRef>
delay_import_directory_iterator;
typedef content_iterator<ExportDirectoryEntryRef> export_directory_iterator;
typedef content_iterator<ImportedSymbolRef> imported_symbol_iterator;
typedef content_iterator<BaseRelocRef> base_reloc_iterator;
/// 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 import_directory_table_entry {
support::ulittle32_t ImportLookupTableRVA;
support::ulittle32_t TimeDateStamp;
support::ulittle32_t ForwarderChain;
support::ulittle32_t NameRVA;
support::ulittle32_t ImportAddressTableRVA;
};
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;
}
};
typedef import_lookup_table_entry<support::little32_t>
import_lookup_table_entry32;
typedef import_lookup_table_entry<support::little64_t>
import_lookup_table_entry64;
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;
};
typedef support::ulittle32_t export_name_pointer_table_entry;
typedef support::ulittle16_t export_ordinal_table_entry;
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;
};
typedef coff_symbol<support::ulittle16_t> coff_symbol16;
typedef coff_symbol<support::ulittle32_t> coff_symbol32;
// 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;
};
class COFFSymbolRef {
public:
COFFSymbolRef(const coff_symbol16 *CS) : CS16(CS), CS32(nullptr) {}
COFFSymbolRef(const coff_symbol32 *CS) : CS16(nullptr), CS32(CS) {}
COFFSymbolRef() : CS16(nullptr), CS32(nullptr) {}
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 { 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;
}
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;
const coff_symbol32 *CS32;
};
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. Both 0 and 1 mean alignment 1.
uint32_t Shift = (Characteristics >> 20) & 0xF;
if (Shift > 0)
return 1U << (Shift - 1);
return 1;
}
};
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;
};
struct coff_aux_bf_and_ef_symbol {
char Unused1[4];
support::ulittle16_t Linenumber;
char Unused2[6];
support::ulittle32_t PointerToNextFunction;
};
struct coff_aux_weak_external {
support::ulittle32_t TagIndex;
support::ulittle32_t Characteristics;
};
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);
}
};
struct coff_aux_clr_token {
uint8_t AuxType;
uint8_t Reserved;
support::ulittle32_t SymbolTableIndex;
};
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;
};
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 & 0x00F00000) >> 20;
if (Shift > 0)
return 1U << (Shift - 1);
return 0;
}
};
typedef coff_tls_directory<support::little32_t> coff_tls_directory32;
typedef coff_tls_directory<support::little64_t> coff_tls_directory64;
struct coff_load_configuration32 {
support::ulittle32_t Characteristics;
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 Reserved;
support::ulittle32_t EditList;
support::ulittle32_t SecurityCookie;
support::ulittle32_t SEHandlerTable;
support::ulittle32_t SEHandlerCount;
};
struct coff_load_configuration64 {
support::ulittle32_t Characteristics;
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 Reserved;
support::ulittle32_t EditList;
support::ulittle64_t SecurityCookie;
support::ulittle64_t SEHandlerTable;
support::ulittle64_t SEHandlerCount;
};
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); }
};
class COFFObjectFile : public ObjectFile {
private:
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 import_directory_table_entry *ImportDirectory;
uint32_t NumberOfImportDirectory;
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;
std::error_code getString(uint32_t offset, StringRef &Res) 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;
std::error_code initSymbolTablePtr();
std::error_code initImportTablePtr();
std::error_code initDelayImportTablePtr();
std::error_code initExportTablePtr();
std::error_code initBaseRelocPtr();
public:
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 getNumberOfSymbols() const {
if (COFFHeader)
return COFFHeader->isImportLibrary() ? 0 : COFFHeader->NumberOfSymbols;
if (COFFBigObjHeader)
return COFFBigObjHeader->NumberOfSymbols;
llvm_unreachable("no COFF header!");
}
protected:
void moveSymbolNext(DataRefImpl &Symb) const override;
ErrorOr<StringRef> getSymbolName(DataRefImpl Symb) const override;
ErrorOr<uint64_t> getSymbolAddress(DataRefImpl Symb) const override;
uint64_t getSymbolValueImpl(DataRefImpl Symb) const override;
uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override;
uint32_t getSymbolFlags(DataRefImpl Symb) const override;
ErrorOr<SymbolRef::Type> getSymbolType(DataRefImpl Symb) const override;
ErrorOr<section_iterator> getSymbolSection(DataRefImpl Symb) const override;
void moveSectionNext(DataRefImpl &Sec) const override;
std::error_code getSectionName(DataRefImpl Sec,
StringRef &Res) const override;
uint64_t getSectionAddress(DataRefImpl Sec) const override;
uint64_t getSectionSize(DataRefImpl Sec) const override;
std::error_code getSectionContents(DataRefImpl Sec,
StringRef &Res) const override;
uint64_t getSectionAlignment(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;
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:
COFFObjectFile(MemoryBufferRef Object, std::error_code &EC);
basic_symbol_iterator symbol_begin_impl() const override;
basic_symbol_iterator symbol_end_impl() 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;
unsigned getArch() const override;
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;
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;
const dos_header *getDOSHeader() const {
if (!PE32Header && !PE32PlusHeader)
return nullptr;
return reinterpret_cast<const dos_header *>(base());
}
std::error_code getPE32Header(const pe32_header *&Res) const;
std::error_code getPE32PlusHeader(const pe32plus_header *&Res) const;
std::error_code getDataDirectory(uint32_t index,
const data_directory *&Res) const;
std::error_code getSection(int32_t index, const coff_section *&Res) const;
template <typename coff_symbol_type>
std::error_code getSymbol(uint32_t Index,
const coff_symbol_type *&Res) const {
if (Index >= getNumberOfSymbols())
return object_error::parse_failed;
Res = reinterpret_cast<coff_symbol_type *>(getSymbolTable()) + Index;
return std::error_code();
}
ErrorOr<COFFSymbolRef> getSymbol(uint32_t index) const {
if (SymbolTable16) {
const coff_symbol16 *Symb = nullptr;
if (std::error_code EC = getSymbol(index, Symb))
return EC;
return COFFSymbolRef(Symb);
}
if (SymbolTable32) {
const coff_symbol32 *Symb = nullptr;
if (std::error_code EC = getSymbol(index, Symb))
return EC;
return COFFSymbolRef(Symb);
}
return object_error::parse_failed;
}
template <typename T>
std::error_code getAuxSymbol(uint32_t index, const T *&Res) const {
ErrorOr<COFFSymbolRef> s = getSymbol(index);
if (std::error_code EC = s.getError())
return EC;
Res = reinterpret_cast<const T *>(s->getRawPtr());
return std::error_code();
}
std::error_code getSymbolName(COFFSymbolRef Symbol, StringRef &Res) const;
std::error_code getSymbolName(const coff_symbol_generic *Symbol,
StringRef &Res) const;
ArrayRef<uint8_t> getSymbolAuxData(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!");
}
iterator_range<const coff_relocation *>
getRelocations(const coff_section *Sec) const;
std::error_code getSectionName(const coff_section *Sec, StringRef &Res) const;
uint64_t getSectionSize(const coff_section *Sec) const;
std::error_code getSectionContents(const coff_section *Sec,
ArrayRef<uint8_t> &Res) const;
uint64_t getImageBase() const;
std::error_code getVaPtr(uint64_t VA, uintptr_t &Res) const;
std::error_code getRvaPtr(uint32_t Rva, uintptr_t &Res) const;
std::error_code getHintName(uint32_t Rva, uint16_t &Hint,
StringRef &Name) const;
bool isRelocatableObject() const override;
bool is64() const { return PE32PlusHeader; }
static inline bool classof(const Binary *v) { return v->isCOFF(); }
};
// The iterator for the import directory table.
class ImportDirectoryEntryRef {
public:
ImportDirectoryEntryRef() : OwningObject(nullptr) {}
ImportDirectoryEntryRef(const 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;
std::error_code getName(StringRef &Result) const;
std::error_code getImportLookupTableRVA(uint32_t &Result) const;
std::error_code getImportAddressTableRVA(uint32_t &Result) const;
std::error_code
getImportTableEntry(const import_directory_table_entry *&Result) const;
std::error_code
getImportLookupEntry(const import_lookup_table_entry32 *&Result) const;
private:
const import_directory_table_entry *ImportTable;
uint32_t Index;
const COFFObjectFile *OwningObject;
};
class DelayImportDirectoryEntryRef {
public:
DelayImportDirectoryEntryRef() : OwningObject(nullptr) {}
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;
std::error_code getName(StringRef &Result) const;
std::error_code getDelayImportTable(
const delay_import_directory_table_entry *&Result) const;
std::error_code getImportAddress(int AddrIndex, uint64_t &Result) const;
private:
const delay_import_directory_table_entry *Table;
uint32_t Index;
const COFFObjectFile *OwningObject;
};
// The iterator for the export directory table entry.
class ExportDirectoryEntryRef {
public:
ExportDirectoryEntryRef() : OwningObject(nullptr) {}
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();
std::error_code getDllName(StringRef &Result) const;
std::error_code getOrdinalBase(uint32_t &Result) const;
std::error_code getOrdinal(uint32_t &Result) const;
std::error_code getExportRVA(uint32_t &Result) const;
std::error_code getSymbolName(StringRef &Result) const;
std::error_code isForwarder(bool &Result) const;
std::error_code getForwardTo(StringRef &Result) const;
private:
const export_directory_table_entry *ExportTable;
uint32_t Index;
const COFFObjectFile *OwningObject;
};
class ImportedSymbolRef {
public:
ImportedSymbolRef() : OwningObject(nullptr) {}
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();
std::error_code getSymbolName(StringRef &Result) const;
std::error_code getOrdinal(uint16_t &Result) const;
private:
const import_lookup_table_entry32 *Entry32;
const import_lookup_table_entry64 *Entry64;
uint32_t Index;
const COFFObjectFile *OwningObject;
};
class BaseRelocRef {
public:
BaseRelocRef() : OwningObject(nullptr) {}
BaseRelocRef(const coff_base_reloc_block_header *Header,
const COFFObjectFile *Owner)
: Header(Header), Index(0), OwningObject(Owner) {}
bool operator==(const BaseRelocRef &Other) const;
void moveNext();
std::error_code getType(uint8_t &Type) const;
std::error_code getRVA(uint32_t &Result) const;
private:
const coff_base_reloc_block_header *Header;
uint32_t Index;
const COFFObjectFile *OwningObject;
};
} // end namespace object
} // end namespace llvm
#endif
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