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//===- Object.h -------------------------------------------------*- 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
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_OBJCOPY_COFF_OBJECT_H
#define LLVM_TOOLS_OBJCOPY_COFF_OBJECT_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/BinaryFormat/COFF.h"
#include "llvm/Object/COFF.h"
#include <cstddef>
#include <cstdint>
#include <vector>
namespace llvm {
namespace objcopy {
namespace coff {
struct Relocation {
Relocation() = default;
Relocation(const object::coff_relocation &R) : Reloc(R) {}
object::coff_relocation Reloc;
size_t Target = 0;
StringRef TargetName; // Used for diagnostics only
};
struct Section {
object::coff_section Header;
std::vector<Relocation> Relocs;
StringRef Name;
ssize_t UniqueId;
size_t Index;
ArrayRef<uint8_t> getContents() const {
if (!OwnedContents.empty())
return OwnedContents;
return ContentsRef;
}
void setContentsRef(ArrayRef<uint8_t> Data) {
OwnedContents.clear();
ContentsRef = Data;
}
void setOwnedContents(std::vector<uint8_t> &&Data) {
ContentsRef = ArrayRef<uint8_t>();
OwnedContents = std::move(Data);
}
void clearContents() {
ContentsRef = ArrayRef<uint8_t>();
OwnedContents.clear();
}
private:
ArrayRef<uint8_t> ContentsRef;
std::vector<uint8_t> OwnedContents;
};
struct AuxSymbol {
AuxSymbol(ArrayRef<uint8_t> In) {
assert(In.size() == sizeof(Opaque));
std::copy(In.begin(), In.end(), Opaque);
}
ArrayRef<uint8_t> getRef() const {
return ArrayRef<uint8_t>(Opaque, sizeof(Opaque));
}
uint8_t Opaque[sizeof(object::coff_symbol16)];
};
struct Symbol {
object::coff_symbol32 Sym;
StringRef Name;
std::vector<AuxSymbol> AuxData;
StringRef AuxFile;
ssize_t TargetSectionId;
ssize_t AssociativeComdatTargetSectionId = 0;
Optional<size_t> WeakTargetSymbolId;
size_t UniqueId;
size_t RawIndex;
bool Referenced;
};
struct Object {
bool IsPE = false;
object::dos_header DosHeader;
ArrayRef<uint8_t> DosStub;
object::coff_file_header CoffFileHeader;
bool Is64 = false;
object::pe32plus_header PeHeader;
uint32_t BaseOfData = 0; // pe32plus_header lacks this field.
std::vector<object::data_directory> DataDirectories;
ArrayRef<Symbol> getSymbols() const { return Symbols; }
// This allows mutating individual Symbols, but not mutating the list
// of symbols itself.
iterator_range<std::vector<Symbol>::iterator> getMutableSymbols() {
return make_range(Symbols.begin(), Symbols.end());
}
const Symbol *findSymbol(size_t UniqueId) const;
void addSymbols(ArrayRef<Symbol> NewSymbols);
Error removeSymbols(function_ref<Expected<bool>(const Symbol &)> ToRemove);
// Set the Referenced field on all Symbols, based on relocations in
// all sections.
Error markSymbols();
ArrayRef<Section> getSections() const { return Sections; }
// This allows mutating individual Sections, but not mutating the list
// of sections itself.
iterator_range<std::vector<Section>::iterator> getMutableSections() {
return make_range(Sections.begin(), Sections.end());
}
const Section *findSection(ssize_t UniqueId) const;
void addSections(ArrayRef<Section> NewSections);
void removeSections(function_ref<bool(const Section &)> ToRemove);
void truncateSections(function_ref<bool(const Section &)> ToTruncate);
private:
std::vector<Symbol> Symbols;
DenseMap<size_t, Symbol *> SymbolMap;
size_t NextSymbolUniqueId = 0;
std::vector<Section> Sections;
DenseMap<ssize_t, Section *> SectionMap;
ssize_t NextSectionUniqueId = 1; // Allow a UniqueId 0 to mean undefined.
// Update SymbolMap.
void updateSymbols();
// Update SectionMap and Index in each Section.
void updateSections();
};
// Copy between coff_symbol16 and coff_symbol32.
// The source and destination files can use either coff_symbol16 or
// coff_symbol32, while we always store them as coff_symbol32 in the
// intermediate data structure.
template <class Symbol1Ty, class Symbol2Ty>
void copySymbol(Symbol1Ty &Dest, const Symbol2Ty &Src) {
static_assert(sizeof(Dest.Name.ShortName) == sizeof(Src.Name.ShortName),
"Mismatched name sizes");
memcpy(Dest.Name.ShortName, Src.Name.ShortName, sizeof(Dest.Name.ShortName));
Dest.Value = Src.Value;
Dest.SectionNumber = Src.SectionNumber;
Dest.Type = Src.Type;
Dest.StorageClass = Src.StorageClass;
Dest.NumberOfAuxSymbols = Src.NumberOfAuxSymbols;
}
// Copy between pe32_header and pe32plus_header.
// We store the intermediate state in a pe32plus_header.
template <class PeHeader1Ty, class PeHeader2Ty>
void copyPeHeader(PeHeader1Ty &Dest, const PeHeader2Ty &Src) {
Dest.Magic = Src.Magic;
Dest.MajorLinkerVersion = Src.MajorLinkerVersion;
Dest.MinorLinkerVersion = Src.MinorLinkerVersion;
Dest.SizeOfCode = Src.SizeOfCode;
Dest.SizeOfInitializedData = Src.SizeOfInitializedData;
Dest.SizeOfUninitializedData = Src.SizeOfUninitializedData;
Dest.AddressOfEntryPoint = Src.AddressOfEntryPoint;
Dest.BaseOfCode = Src.BaseOfCode;
Dest.ImageBase = Src.ImageBase;
Dest.SectionAlignment = Src.SectionAlignment;
Dest.FileAlignment = Src.FileAlignment;
Dest.MajorOperatingSystemVersion = Src.MajorOperatingSystemVersion;
Dest.MinorOperatingSystemVersion = Src.MinorOperatingSystemVersion;
Dest.MajorImageVersion = Src.MajorImageVersion;
Dest.MinorImageVersion = Src.MinorImageVersion;
Dest.MajorSubsystemVersion = Src.MajorSubsystemVersion;
Dest.MinorSubsystemVersion = Src.MinorSubsystemVersion;
Dest.Win32VersionValue = Src.Win32VersionValue;
Dest.SizeOfImage = Src.SizeOfImage;
Dest.SizeOfHeaders = Src.SizeOfHeaders;
Dest.CheckSum = Src.CheckSum;
Dest.Subsystem = Src.Subsystem;
Dest.DLLCharacteristics = Src.DLLCharacteristics;
Dest.SizeOfStackReserve = Src.SizeOfStackReserve;
Dest.SizeOfStackCommit = Src.SizeOfStackCommit;
Dest.SizeOfHeapReserve = Src.SizeOfHeapReserve;
Dest.SizeOfHeapCommit = Src.SizeOfHeapCommit;
Dest.LoaderFlags = Src.LoaderFlags;
Dest.NumberOfRvaAndSize = Src.NumberOfRvaAndSize;
}
} // end namespace coff
} // end namespace objcopy
} // end namespace llvm
#endif // LLVM_TOOLS_OBJCOPY_COFF_OBJECT_H
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