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llvm-6502/include/llvm/Object/MachO.h

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//===- MachO.h - MachO 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 MachOObjectFile class, which implement the ObjectFile
// interface for MachO files.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_OBJECT_MACHO_H
#define LLVM_OBJECT_MACHO_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/MachO.h"
namespace llvm {
namespace object {
/// DiceRef - This is a value type class that represents a single
/// data in code entry in the table in a Mach-O object file.
class DiceRef {
DataRefImpl DicePimpl;
const ObjectFile *OwningObject;
public:
DiceRef() : OwningObject(nullptr) { }
DiceRef(DataRefImpl DiceP, const ObjectFile *Owner);
bool operator==(const DiceRef &Other) const;
bool operator<(const DiceRef &Other) const;
void moveNext();
std::error_code getOffset(uint32_t &Result) const;
std::error_code getLength(uint16_t &Result) const;
std::error_code getKind(uint16_t &Result) const;
DataRefImpl getRawDataRefImpl() const;
const ObjectFile *getObjectFile() const;
};
typedef content_iterator<DiceRef> dice_iterator;
/// ExportEntry encapsulates the current-state-of-the-walk used when doing a
/// non-recursive walk of the trie data structure. This allows you to iterate
/// across all exported symbols using:
/// for (const llvm::object::ExportEntry &AnExport : Obj->exports()) {
/// }
class ExportEntry {
public:
ExportEntry(ArrayRef<uint8_t> Trie);
StringRef name() const;
uint64_t flags() const;
uint64_t address() const;
uint64_t other() const;
StringRef otherName() const;
uint32_t nodeOffset() const;
bool operator==(const ExportEntry &) const;
void moveNext();
private:
friend class MachOObjectFile;
void moveToFirst();
void moveToEnd();
uint64_t readULEB128(const uint8_t *&p);
void pushDownUntilBottom();
void pushNode(uint64_t Offset);
// Represents a node in the mach-o exports trie.
struct NodeState {
NodeState(const uint8_t *Ptr);
const uint8_t *Start;
const uint8_t *Current;
uint64_t Flags;
uint64_t Address;
uint64_t Other;
const char *ImportName;
unsigned ChildCount;
unsigned NextChildIndex;
unsigned ParentStringLength;
bool IsExportNode;
};
ArrayRef<uint8_t> Trie;
SmallString<256> CumulativeString;
SmallVector<NodeState, 16> Stack;
bool Malformed;
bool Done;
};
typedef content_iterator<ExportEntry> export_iterator;
/// MachORebaseEntry encapsulates the current state in the decompression of
/// rebasing opcodes. This allows you to iterate through the compressed table of
/// rebasing using:
/// for (const llvm::object::MachORebaseEntry &Entry : Obj->rebaseTable()) {
/// }
class MachORebaseEntry {
public:
MachORebaseEntry(ArrayRef<uint8_t> opcodes, bool is64Bit);
uint32_t segmentIndex() const;
uint64_t segmentOffset() const;
StringRef typeName() const;
bool operator==(const MachORebaseEntry &) const;
void moveNext();
private:
friend class MachOObjectFile;
void moveToFirst();
void moveToEnd();
uint64_t readULEB128();
ArrayRef<uint8_t> Opcodes;
const uint8_t *Ptr;
uint64_t SegmentOffset;
uint32_t SegmentIndex;
uint64_t RemainingLoopCount;
uint64_t AdvanceAmount;
uint8_t RebaseType;
uint8_t PointerSize;
bool Malformed;
bool Done;
};
typedef content_iterator<MachORebaseEntry> rebase_iterator;
/// MachOBindEntry encapsulates the current state in the decompression of
/// binding opcodes. This allows you to iterate through the compressed table of
/// bindings using:
/// for (const llvm::object::MachOBindEntry &Entry : Obj->bindTable()) {
/// }
class MachOBindEntry {
public:
enum class Kind { Regular, Lazy, Weak };
MachOBindEntry(ArrayRef<uint8_t> Opcodes, bool is64Bit, MachOBindEntry::Kind);
uint32_t segmentIndex() const;
uint64_t segmentOffset() const;
StringRef typeName() const;
StringRef symbolName() const;
uint32_t flags() const;
int64_t addend() const;
int ordinal() const;
bool operator==(const MachOBindEntry &) const;
void moveNext();
private:
friend class MachOObjectFile;
void moveToFirst();
void moveToEnd();
uint64_t readULEB128();
int64_t readSLEB128();
ArrayRef<uint8_t> Opcodes;
const uint8_t *Ptr;
uint64_t SegmentOffset;
uint32_t SegmentIndex;
StringRef SymbolName;
int Ordinal;
uint32_t Flags;
int64_t Addend;
uint64_t RemainingLoopCount;
uint64_t AdvanceAmount;
uint8_t BindType;
uint8_t PointerSize;
Kind TableKind;
bool Malformed;
bool Done;
};
typedef content_iterator<MachOBindEntry> bind_iterator;
class MachOObjectFile : public ObjectFile {
public:
struct LoadCommandInfo {
const char *Ptr; // Where in memory the load command is.
MachO::load_command C; // The command itself.
};
MachOObjectFile(MemoryBufferRef Object, bool IsLittleEndian, bool Is64Bits,
std::error_code &EC);
void moveSymbolNext(DataRefImpl &Symb) const override;
std::error_code getSymbolName(DataRefImpl Symb,
StringRef &Res) const override;
// MachO specific.
std::error_code getIndirectName(DataRefImpl Symb, StringRef &Res) const;
std::error_code getSymbolAddress(DataRefImpl Symb,
uint64_t &Res) const override;
std::error_code getSymbolAlignment(DataRefImpl Symb,
uint32_t &Res) const override;
std::error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const override;
std::error_code getSymbolType(DataRefImpl Symb,
SymbolRef::Type &Res) const override;
uint32_t getSymbolFlags(DataRefImpl Symb) const override;
std::error_code getSymbolSection(DataRefImpl Symb,
section_iterator &Res) 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 isSectionRequiredForExecution(DataRefImpl Sec) const override;
bool isSectionVirtual(DataRefImpl Sec) const override;
bool isSectionZeroInit(DataRefImpl Sec) const override;
bool isSectionReadOnlyData(DataRefImpl Sec) const override;
bool sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb) 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;
std::error_code getRelocationAddress(DataRefImpl Rel,
uint64_t &Res) const override;
std::error_code getRelocationOffset(DataRefImpl Rel,
uint64_t &Res) const override;
symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
std::error_code getRelocationType(DataRefImpl Rel,
uint64_t &Res) const override;
std::error_code
getRelocationTypeName(DataRefImpl Rel,
SmallVectorImpl<char> &Result) const override;
std::error_code
getRelocationValueString(DataRefImpl Rel,
SmallVectorImpl<char> &Result) const override;
std::error_code getRelocationHidden(DataRefImpl Rel,
bool &Result) const override;
// MachO specific.
std::error_code getLibraryShortNameByIndex(unsigned Index, StringRef &) const;
// TODO: Would be useful to have an iterator based version
// of the load command interface too.
basic_symbol_iterator symbol_begin_impl() const override;
basic_symbol_iterator symbol_end_impl() const override;
// MachO specific.
basic_symbol_iterator getSymbolByIndex(unsigned Index) const;
section_iterator section_begin() const override;
section_iterator section_end() const override;
uint8_t getBytesInAddress() const override;
StringRef getFileFormatName() const override;
unsigned getArch() const override;
Triple getArch(const char **McpuDefault, Triple *ThumbTriple) const;
relocation_iterator section_rel_begin(unsigned Index) const;
relocation_iterator section_rel_end(unsigned Index) const;
dice_iterator begin_dices() const;
dice_iterator end_dices() const;
/// For use iterating over all exported symbols.
iterator_range<export_iterator> exports() const;
/// For use examining a trie not in a MachOObjectFile.
static iterator_range<export_iterator> exports(ArrayRef<uint8_t> Trie);
/// For use iterating over all rebase table entries.
iterator_range<rebase_iterator> rebaseTable() const;
/// For use examining rebase opcodes not in a MachOObjectFile.
static iterator_range<rebase_iterator> rebaseTable(ArrayRef<uint8_t> Opcodes,
bool is64);
/// For use iterating over all bind table entries.
iterator_range<bind_iterator> bindTable() const;
/// For use iterating over all lazy bind table entries.
iterator_range<bind_iterator> lazyBindTable() const;
/// For use iterating over all lazy bind table entries.
iterator_range<bind_iterator> weakBindTable() const;
/// For use examining bind opcodes not in a MachOObjectFile.
static iterator_range<bind_iterator> bindTable(ArrayRef<uint8_t> Opcodes,
bool is64,
MachOBindEntry::Kind);
// In a MachO file, sections have a segment name. This is used in the .o
// files. They have a single segment, but this field specifies which segment
// a section should be put in in the final object.
StringRef getSectionFinalSegmentName(DataRefImpl Sec) const;
// Names are stored as 16 bytes. These returns the raw 16 bytes without
// interpreting them as a C string.
ArrayRef<char> getSectionRawName(DataRefImpl Sec) const;
ArrayRef<char> getSectionRawFinalSegmentName(DataRefImpl Sec) const;
// MachO specific Info about relocations.
bool isRelocationScattered(const MachO::any_relocation_info &RE) const;
unsigned getPlainRelocationSymbolNum(
const MachO::any_relocation_info &RE) const;
bool getPlainRelocationExternal(const MachO::any_relocation_info &RE) const;
bool getScatteredRelocationScattered(
const MachO::any_relocation_info &RE) const;
uint32_t getScatteredRelocationValue(
const MachO::any_relocation_info &RE) const;
uint32_t getScatteredRelocationType(
const MachO::any_relocation_info &RE) const;
unsigned getAnyRelocationAddress(const MachO::any_relocation_info &RE) const;
unsigned getAnyRelocationPCRel(const MachO::any_relocation_info &RE) const;
unsigned getAnyRelocationLength(const MachO::any_relocation_info &RE) const;
unsigned getAnyRelocationType(const MachO::any_relocation_info &RE) const;
SectionRef getRelocationSection(const MachO::any_relocation_info &RE) const;
// Walk load commands.
LoadCommandInfo getFirstLoadCommandInfo() const;
LoadCommandInfo getNextLoadCommandInfo(const LoadCommandInfo &L) const;
// MachO specific structures.
MachO::section getSection(DataRefImpl DRI) const;
MachO::section_64 getSection64(DataRefImpl DRI) const;
MachO::section getSection(const LoadCommandInfo &L, unsigned Index) const;
MachO::section_64 getSection64(const LoadCommandInfo &L,unsigned Index) const;
MachO::nlist getSymbolTableEntry(DataRefImpl DRI) const;
MachO::nlist_64 getSymbol64TableEntry(DataRefImpl DRI) const;
MachO::linkedit_data_command
getLinkeditDataLoadCommand(const LoadCommandInfo &L) const;
MachO::segment_command
getSegmentLoadCommand(const LoadCommandInfo &L) const;
MachO::segment_command_64
getSegment64LoadCommand(const LoadCommandInfo &L) const;
MachO::linker_options_command
getLinkerOptionsLoadCommand(const LoadCommandInfo &L) const;
MachO::version_min_command
getVersionMinLoadCommand(const LoadCommandInfo &L) const;
MachO::dylib_command
getDylibIDLoadCommand(const LoadCommandInfo &L) const;
MachO::dyld_info_command
getDyldInfoLoadCommand(const LoadCommandInfo &L) const;
MachO::dylinker_command
getDylinkerCommand(const LoadCommandInfo &L) const;
MachO::uuid_command
getUuidCommand(const LoadCommandInfo &L) const;
MachO::source_version_command
getSourceVersionCommand(const LoadCommandInfo &L) const;
MachO::entry_point_command
getEntryPointCommand(const LoadCommandInfo &L) const;
MachO::any_relocation_info getRelocation(DataRefImpl Rel) const;
MachO::data_in_code_entry getDice(DataRefImpl Rel) const;
MachO::mach_header getHeader() const;
MachO::mach_header_64 getHeader64() const;
uint32_t
getIndirectSymbolTableEntry(const MachO::dysymtab_command &DLC,
unsigned Index) const;
MachO::data_in_code_entry getDataInCodeTableEntry(uint32_t DataOffset,
unsigned Index) const;
MachO::symtab_command getSymtabLoadCommand() const;
MachO::dysymtab_command getDysymtabLoadCommand() const;
MachO::linkedit_data_command getDataInCodeLoadCommand() const;
ArrayRef<uint8_t> getDyldInfoRebaseOpcodes() const;
ArrayRef<uint8_t> getDyldInfoBindOpcodes() const;
ArrayRef<uint8_t> getDyldInfoWeakBindOpcodes() const;
ArrayRef<uint8_t> getDyldInfoLazyBindOpcodes() const;
ArrayRef<uint8_t> getDyldInfoExportsTrie() const;
ArrayRef<uint8_t> getUuid() const;
StringRef getStringTableData() const;
bool is64Bit() const;
void ReadULEB128s(uint64_t Index, SmallVectorImpl<uint64_t> &Out) const;
static StringRef guessLibraryShortName(StringRef Name, bool &isFramework,
StringRef &Suffix);
static Triple::ArchType getArch(uint32_t CPUType);
static Triple getArch(uint32_t CPUType, uint32_t CPUSubType,
const char **McpuDefault = nullptr);
static Triple getThumbArch(uint32_t CPUType, uint32_t CPUSubType,
const char **McpuDefault = nullptr);
static Triple getArch(uint32_t CPUType, uint32_t CPUSubType,
const char **McpuDefault, Triple *ThumbTriple);
static bool isValidArch(StringRef ArchFlag);
static Triple getHostArch();
bool isRelocatableObject() const override;
bool hasPageZeroSegment() const { return HasPageZeroSegment; }
static bool classof(const Binary *v) {
return v->isMachO();
}
private:
typedef SmallVector<const char*, 1> SectionList;
SectionList Sections;
typedef SmallVector<const char*, 1> LibraryList;
LibraryList Libraries;
typedef SmallVector<StringRef, 1> LibraryShortName;
mutable LibraryShortName LibrariesShortNames;
const char *SymtabLoadCmd;
const char *DysymtabLoadCmd;
const char *DataInCodeLoadCmd;
const char *DyldInfoLoadCmd;
const char *UuidLoadCmd;
bool HasPageZeroSegment;
};
/// DiceRef
inline DiceRef::DiceRef(DataRefImpl DiceP, const ObjectFile *Owner)
: DicePimpl(DiceP) , OwningObject(Owner) {}
inline bool DiceRef::operator==(const DiceRef &Other) const {
return DicePimpl == Other.DicePimpl;
}
inline bool DiceRef::operator<(const DiceRef &Other) const {
return DicePimpl < Other.DicePimpl;
}
inline void DiceRef::moveNext() {
const MachO::data_in_code_entry *P =
reinterpret_cast<const MachO::data_in_code_entry *>(DicePimpl.p);
DicePimpl.p = reinterpret_cast<uintptr_t>(P + 1);
}
// Since a Mach-O data in code reference, a DiceRef, can only be created when
// the OwningObject ObjectFile is a MachOObjectFile a static_cast<> is used for
// the methods that get the values of the fields of the reference.
inline std::error_code DiceRef::getOffset(uint32_t &Result) const {
const MachOObjectFile *MachOOF =
static_cast<const MachOObjectFile *>(OwningObject);
MachO::data_in_code_entry Dice = MachOOF->getDice(DicePimpl);
Result = Dice.offset;
return object_error::success;
}
inline std::error_code DiceRef::getLength(uint16_t &Result) const {
const MachOObjectFile *MachOOF =
static_cast<const MachOObjectFile *>(OwningObject);
MachO::data_in_code_entry Dice = MachOOF->getDice(DicePimpl);
Result = Dice.length;
return object_error::success;
}
inline std::error_code DiceRef::getKind(uint16_t &Result) const {
const MachOObjectFile *MachOOF =
static_cast<const MachOObjectFile *>(OwningObject);
MachO::data_in_code_entry Dice = MachOOF->getDice(DicePimpl);
Result = Dice.kind;
return object_error::success;
}
inline DataRefImpl DiceRef::getRawDataRefImpl() const {
return DicePimpl;
}
inline const ObjectFile *DiceRef::getObjectFile() const {
return OwningObject;
}
}
}
#endif
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