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llvm-mirror/include/llvm/Object/MachO.h
Seiya Nuta 52efdb7adc [yaml2obj/obj2yaml][MachO] Allow setting custom section data 
Reviewers: alexshap, jhenderson, rupprecht

Reviewed By: alexshap, jhenderson

Subscribers: abrachet, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D65799

llvm-svn: 369348
2019-08-20 08:49:07 +00:00

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//===- MachO.h - MachO 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 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/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Triple.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/BinaryFormat/MachO.h"
#include "llvm/MC/SubtargetFeature.h"
#include "llvm/Object/Binary.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Object/SymbolicFile.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include <cstdint>
#include <memory>
#include <string>
#include <system_error>
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 = nullptr;
public:
DiceRef() = default;
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;
};
using dice_iterator = content_iterator<DiceRef>;
/// 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:
/// Error Err;
/// for (const llvm::object::ExportEntry &AnExport : Obj->exports(&Err)) {
/// }
/// if (Err) { report error ...
class ExportEntry {
public:
ExportEntry(Error *Err, const MachOObjectFile *O, 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, const char **error);
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 = 0;
uint64_t Address = 0;
uint64_t Other = 0;
const char *ImportName = nullptr;
unsigned ChildCount = 0;
unsigned NextChildIndex = 0;
unsigned ParentStringLength = 0;
bool IsExportNode = false;
};
using NodeList = SmallVector<NodeState, 16>;
using node_iterator = NodeList::const_iterator;
Error *E;
const MachOObjectFile *O;
ArrayRef<uint8_t> Trie;
SmallString<256> CumulativeString;
NodeList Stack;
bool Done = false;
iterator_range<node_iterator> nodes() const {
return make_range(Stack.begin(), Stack.end());
}
};
using export_iterator = content_iterator<ExportEntry>;
// Segment info so SegIndex/SegOffset pairs in a Mach-O Bind or Rebase entry
// can be checked and translated. Only the SegIndex/SegOffset pairs from
// checked entries are to be used with the segmentName(), sectionName() and
// address() methods below.
class BindRebaseSegInfo {
public:
BindRebaseSegInfo(const MachOObjectFile *Obj);
// Used to check a Mach-O Bind or Rebase entry for errors when iterating.
const char* checkSegAndOffsets(int32_t SegIndex, uint64_t SegOffset,
uint8_t PointerSize, uint32_t Count=1,
uint32_t Skip=0);
// Used with valid SegIndex/SegOffset values from checked entries.
StringRef segmentName(int32_t SegIndex);
StringRef sectionName(int32_t SegIndex, uint64_t SegOffset);
uint64_t address(uint32_t SegIndex, uint64_t SegOffset);
private:
struct SectionInfo {
uint64_t Address;
uint64_t Size;
StringRef SectionName;
StringRef SegmentName;
uint64_t OffsetInSegment;
uint64_t SegmentStartAddress;
int32_t SegmentIndex;
};
const SectionInfo &findSection(int32_t SegIndex, uint64_t SegOffset);
SmallVector<SectionInfo, 32> Sections;
int32_t MaxSegIndex;
};
/// MachORebaseEntry encapsulates the current state in the decompression of
/// rebasing opcodes. This allows you to iterate through the compressed table of
/// rebasing using:
/// Error Err;
/// for (const llvm::object::MachORebaseEntry &Entry : Obj->rebaseTable(&Err)) {
/// }
/// if (Err) { report error ...
class MachORebaseEntry {
public:
MachORebaseEntry(Error *Err, const MachOObjectFile *O,
ArrayRef<uint8_t> opcodes, bool is64Bit);
int32_t segmentIndex() const;
uint64_t segmentOffset() const;
StringRef typeName() const;
StringRef segmentName() const;
StringRef sectionName() const;
uint64_t address() const;
bool operator==(const MachORebaseEntry &) const;
void moveNext();
private:
friend class MachOObjectFile;
void moveToFirst();
void moveToEnd();
uint64_t readULEB128(const char **error);
Error *E;
const MachOObjectFile *O;
ArrayRef<uint8_t> Opcodes;
const uint8_t *Ptr;
uint64_t SegmentOffset = 0;
int32_t SegmentIndex = -1;
uint64_t RemainingLoopCount = 0;
uint64_t AdvanceAmount = 0;
uint8_t RebaseType = 0;
uint8_t PointerSize;
bool Done = false;
};
using rebase_iterator = content_iterator<MachORebaseEntry>;
/// MachOBindEntry encapsulates the current state in the decompression of
/// binding opcodes. This allows you to iterate through the compressed table of
/// bindings using:
/// Error Err;
/// for (const llvm::object::MachOBindEntry &Entry : Obj->bindTable(&Err)) {
/// }
/// if (Err) { report error ...
class MachOBindEntry {
public:
enum class Kind { Regular, Lazy, Weak };
MachOBindEntry(Error *Err, const MachOObjectFile *O,
ArrayRef<uint8_t> Opcodes, bool is64Bit, MachOBindEntry::Kind);
int32_t segmentIndex() const;
uint64_t segmentOffset() const;
StringRef typeName() const;
StringRef symbolName() const;
uint32_t flags() const;
int64_t addend() const;
int ordinal() const;
StringRef segmentName() const;
StringRef sectionName() const;
uint64_t address() const;
bool operator==(const MachOBindEntry &) const;
void moveNext();
private:
friend class MachOObjectFile;
void moveToFirst();
void moveToEnd();
uint64_t readULEB128(const char **error);
int64_t readSLEB128(const char **error);
Error *E;
const MachOObjectFile *O;
ArrayRef<uint8_t> Opcodes;
const uint8_t *Ptr;
uint64_t SegmentOffset = 0;
int32_t SegmentIndex = -1;
StringRef SymbolName;
bool LibraryOrdinalSet = false;
int Ordinal = 0;
uint32_t Flags = 0;
int64_t Addend = 0;
uint64_t RemainingLoopCount = 0;
uint64_t AdvanceAmount = 0;
uint8_t BindType = 0;
uint8_t PointerSize;
Kind TableKind;
bool Done = false;
};
using bind_iterator = content_iterator<MachOBindEntry>;
class MachOObjectFile : public ObjectFile {
public:
struct LoadCommandInfo {
const char *Ptr; // Where in memory the load command is.
MachO::load_command C; // The command itself.
};
using LoadCommandList = SmallVector<LoadCommandInfo, 4>;
using load_command_iterator = LoadCommandList::const_iterator;
static Expected<std::unique_ptr<MachOObjectFile>>
create(MemoryBufferRef Object, bool IsLittleEndian, bool Is64Bits,
uint32_t UniversalCputype = 0, uint32_t UniversalIndex = 0);
void moveSymbolNext(DataRefImpl &Symb) const override;
uint64_t getNValue(DataRefImpl Sym) const;
Expected<StringRef> getSymbolName(DataRefImpl Symb) const override;
// MachO specific.
Error checkSymbolTable() const;
std::error_code getIndirectName(DataRefImpl Symb, StringRef &Res) const;
unsigned getSectionType(SectionRef Sec) const;
Expected<uint64_t> getSymbolAddress(DataRefImpl Symb) const override;
uint32_t getSymbolAlignment(DataRefImpl Symb) const override;
uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override;
Expected<SymbolRef::Type> getSymbolType(DataRefImpl Symb) const override;
uint32_t getSymbolFlags(DataRefImpl Symb) const override;
Expected<section_iterator> getSymbolSection(DataRefImpl Symb) const override;
unsigned getSymbolSectionID(SymbolRef Symb) const;
unsigned getSectionID(SectionRef Sec) const;
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;
ArrayRef<uint8_t> getSectionContents(uint32_t Offset, uint64_t Size) const;
Expected<ArrayRef<uint8_t>>
getSectionContents(DataRefImpl Sec) const override;
uint64_t getSectionAlignment(DataRefImpl Sec) const override;
Expected<SectionRef> getSection(unsigned SectionIndex) const;
Expected<SectionRef> getSection(StringRef SectionName) const;
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 isSectionBitcode(DataRefImpl Sec) const override;
/// When dsymutil generates the companion file, it strips all unnecessary
/// sections (e.g. everything in the _TEXT segment) by omitting their body
/// and setting the offset in their corresponding load command to zero.
///
/// While the load command itself is valid, reading the section corresponds
/// to reading the number of bytes specified in the load command, starting
/// from offset 0 (i.e. the Mach-O header at the beginning of the file).
bool isSectionStripped(DataRefImpl Sec) const override;
relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
relocation_iterator section_rel_end(DataRefImpl Sec) const override;
relocation_iterator extrel_begin() const;
relocation_iterator extrel_end() const;
iterator_range<relocation_iterator> external_relocations() const {
return make_range(extrel_begin(), extrel_end());
}
relocation_iterator locrel_begin() const;
relocation_iterator locrel_end() const;
void moveRelocationNext(DataRefImpl &Rel) const override;
uint64_t getRelocationOffset(DataRefImpl Rel) const override;
symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
section_iterator getRelocationSection(DataRefImpl Rel) const;
uint64_t getRelocationType(DataRefImpl Rel) const override;
void getRelocationTypeName(DataRefImpl Rel,
SmallVectorImpl<char> &Result) const override;
uint8_t getRelocationLength(DataRefImpl Rel) const;
// MachO specific.
std::error_code getLibraryShortNameByIndex(unsigned Index, StringRef &) const;
uint32_t getLibraryCount() const;
section_iterator getRelocationRelocatedSection(relocation_iterator Rel) const;
// TODO: Would be useful to have an iterator based version
// of the load command interface too.
basic_symbol_iterator symbol_begin() const override;
basic_symbol_iterator symbol_end() const override;
// MachO specific.
symbol_iterator getSymbolByIndex(unsigned Index) const;
uint64_t getSymbolIndex(DataRefImpl Symb) const;
section_iterator section_begin() const override;
section_iterator section_end() const override;
uint8_t getBytesInAddress() const override;
StringRef getFileFormatName() const override;
Triple::ArchType getArch() const override;
SubtargetFeatures getFeatures() const override { return SubtargetFeatures(); }
Triple getArchTriple(const char **McpuDefault = nullptr) 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;
load_command_iterator begin_load_commands() const;
load_command_iterator end_load_commands() const;
iterator_range<load_command_iterator> load_commands() const;
/// For use iterating over all exported symbols.
iterator_range<export_iterator> exports(Error &Err) const;
/// For use examining a trie not in a MachOObjectFile.
static iterator_range<export_iterator> exports(Error &Err,
ArrayRef<uint8_t> Trie,
const MachOObjectFile *O =
nullptr);
/// For use iterating over all rebase table entries.
iterator_range<rebase_iterator> rebaseTable(Error &Err);
/// For use examining rebase opcodes in a MachOObjectFile.
static iterator_range<rebase_iterator> rebaseTable(Error &Err,
MachOObjectFile *O,
ArrayRef<uint8_t> Opcodes,
bool is64);
/// For use iterating over all bind table entries.
iterator_range<bind_iterator> bindTable(Error &Err);
/// For use iterating over all lazy bind table entries.
iterator_range<bind_iterator> lazyBindTable(Error &Err);
/// For use iterating over all weak bind table entries.
iterator_range<bind_iterator> weakBindTable(Error &Err);
/// For use examining bind opcodes in a MachOObjectFile.
static iterator_range<bind_iterator> bindTable(Error &Err,
MachOObjectFile *O,
ArrayRef<uint8_t> Opcodes,
bool is64,
MachOBindEntry::Kind);
// Given a SegIndex, SegOffset, and PointerSize, verify a valid section exists
// that fully contains a pointer at that location. Multiple fixups in a bind
// (such as with the BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB opcode) can
// be tested via the Count and Skip parameters.
//
// This is used by MachOBindEntry::moveNext() to validate a MachOBindEntry.
const char *BindEntryCheckSegAndOffsets(int32_t SegIndex, uint64_t SegOffset,
uint8_t PointerSize, uint32_t Count=1,
uint32_t Skip=0) const {
return BindRebaseSectionTable->checkSegAndOffsets(SegIndex, SegOffset,
PointerSize, Count, Skip);
}
// Given a SegIndex, SegOffset, and PointerSize, verify a valid section exists
// that fully contains a pointer at that location. Multiple fixups in a rebase
// (such as with the REBASE_OPCODE_DO_*_TIMES* opcodes) can be tested via the
// Count and Skip parameters.
//
// This is used by MachORebaseEntry::moveNext() to validate a MachORebaseEntry
const char *RebaseEntryCheckSegAndOffsets(int32_t SegIndex,
uint64_t SegOffset,
uint8_t PointerSize,
uint32_t Count=1,
uint32_t Skip=0) const {
return BindRebaseSectionTable->checkSegAndOffsets(SegIndex, SegOffset,
PointerSize, Count, Skip);
}
/// For use with the SegIndex of a checked Mach-O Bind or Rebase entry to
/// get the segment name.
StringRef BindRebaseSegmentName(int32_t SegIndex) const {
return BindRebaseSectionTable->segmentName(SegIndex);
}
/// For use with a SegIndex,SegOffset pair from a checked Mach-O Bind or
/// Rebase entry to get the section name.
StringRef BindRebaseSectionName(uint32_t SegIndex, uint64_t SegOffset) const {
return BindRebaseSectionTable->sectionName(SegIndex, SegOffset);
}
/// For use with a SegIndex,SegOffset pair from a checked Mach-O Bind or
/// Rebase entry to get the address.
uint64_t BindRebaseAddress(uint32_t SegIndex, uint64_t SegOffset) const {
return BindRebaseSectionTable->address(SegIndex, SegOffset);
}
// 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 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 getAnyRelocationSection(const MachO::any_relocation_info &RE) 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_option_command
getLinkerOptionLoadCommand(const LoadCommandInfo &L) const;
MachO::version_min_command
getVersionMinLoadCommand(const LoadCommandInfo &L) const;
MachO::note_command
getNoteLoadCommand(const LoadCommandInfo &L) const;
MachO::build_version_command
getBuildVersionLoadCommand(const LoadCommandInfo &L) const;
MachO::build_tool_version
getBuildToolVersion(unsigned index) 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::rpath_command
getRpathCommand(const LoadCommandInfo &L) const;
MachO::source_version_command
getSourceVersionCommand(const LoadCommandInfo &L) const;
MachO::entry_point_command
getEntryPointCommand(const LoadCommandInfo &L) const;
MachO::encryption_info_command
getEncryptionInfoCommand(const LoadCommandInfo &L) const;
MachO::encryption_info_command_64
getEncryptionInfoCommand64(const LoadCommandInfo &L) const;
MachO::sub_framework_command
getSubFrameworkCommand(const LoadCommandInfo &L) const;
MachO::sub_umbrella_command
getSubUmbrellaCommand(const LoadCommandInfo &L) const;
MachO::sub_library_command
getSubLibraryCommand(const LoadCommandInfo &L) const;
MachO::sub_client_command
getSubClientCommand(const LoadCommandInfo &L) const;
MachO::routines_command
getRoutinesCommand(const LoadCommandInfo &L) const;
MachO::routines_command_64
getRoutinesCommand64(const LoadCommandInfo &L) const;
MachO::thread_command
getThreadCommand(const LoadCommandInfo &L) const;
MachO::any_relocation_info getRelocation(DataRefImpl Rel) const;
MachO::data_in_code_entry getDice(DataRefImpl Rel) const;
const MachO::mach_header &getHeader() const;
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;
MachO::linkedit_data_command getLinkOptHintsLoadCommand() 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 getArchTriple(uint32_t CPUType, uint32_t CPUSubType,
const char **McpuDefault = nullptr,
const char **ArchFlag = nullptr);
static bool isValidArch(StringRef ArchFlag);
static ArrayRef<StringRef> getValidArchs();
static Triple getHostArch();
bool isRelocatableObject() const override;
StringRef mapDebugSectionName(StringRef Name) const override;
bool hasPageZeroSegment() const { return HasPageZeroSegment; }
static bool classof(const Binary *v) {
return v->isMachO();
}
static uint32_t
getVersionMinMajor(MachO::version_min_command &C, bool SDK) {
uint32_t VersionOrSDK = (SDK) ? C.sdk : C.version;
return (VersionOrSDK >> 16) & 0xffff;
}
static uint32_t
getVersionMinMinor(MachO::version_min_command &C, bool SDK) {
uint32_t VersionOrSDK = (SDK) ? C.sdk : C.version;
return (VersionOrSDK >> 8) & 0xff;
}
static uint32_t
getVersionMinUpdate(MachO::version_min_command &C, bool SDK) {
uint32_t VersionOrSDK = (SDK) ? C.sdk : C.version;
return VersionOrSDK & 0xff;
}
static std::string getBuildPlatform(uint32_t platform) {
switch (platform) {
case MachO::PLATFORM_MACOS: return "macos";
case MachO::PLATFORM_IOS: return "ios";
case MachO::PLATFORM_TVOS: return "tvos";
case MachO::PLATFORM_WATCHOS: return "watchos";
case MachO::PLATFORM_BRIDGEOS: return "bridgeos";
case MachO::PLATFORM_MACCATALYST: return "macCatalyst";
case MachO::PLATFORM_IOSSIMULATOR: return "iossimulator";
case MachO::PLATFORM_TVOSSIMULATOR: return "tvossimulator";
case MachO::PLATFORM_WATCHOSSIMULATOR: return "watchossimulator";
default:
std::string ret;
raw_string_ostream ss(ret);
ss << format_hex(platform, 8, true);
return ss.str();
}
}
static std::string getBuildTool(uint32_t tools) {
switch (tools) {
case MachO::TOOL_CLANG: return "clang";
case MachO::TOOL_SWIFT: return "swift";
case MachO::TOOL_LD: return "ld";
default:
std::string ret;
raw_string_ostream ss(ret);
ss << format_hex(tools, 8, true);
return ss.str();
}
}
static std::string getVersionString(uint32_t version) {
uint32_t major = (version >> 16) & 0xffff;
uint32_t minor = (version >> 8) & 0xff;
uint32_t update = version & 0xff;
SmallString<32> Version;
Version = utostr(major) + "." + utostr(minor);
if (update != 0)
Version += "." + utostr(update);
return Version.str();
}
private:
MachOObjectFile(MemoryBufferRef Object, bool IsLittleEndian, bool Is64Bits,
Error &Err, uint32_t UniversalCputype = 0,
uint32_t UniversalIndex = 0);
uint64_t getSymbolValueImpl(DataRefImpl Symb) const override;
union {
MachO::mach_header_64 Header64;
MachO::mach_header Header;
};
using SectionList = SmallVector<const char*, 1>;
SectionList Sections;
using LibraryList = SmallVector<const char*, 1>;
LibraryList Libraries;
LoadCommandList LoadCommands;
using LibraryShortName = SmallVector<StringRef, 1>;
using BuildToolList = SmallVector<const char*, 1>;
BuildToolList BuildTools;
mutable LibraryShortName LibrariesShortNames;
std::unique_ptr<BindRebaseSegInfo> BindRebaseSectionTable;
const char *SymtabLoadCmd = nullptr;
const char *DysymtabLoadCmd = nullptr;
const char *DataInCodeLoadCmd = nullptr;
const char *LinkOptHintsLoadCmd = nullptr;
const char *DyldInfoLoadCmd = nullptr;
const char *UuidLoadCmd = nullptr;
bool HasPageZeroSegment = false;
};
/// 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 std::error_code();
}
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 std::error_code();
}
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 std::error_code();
}
inline DataRefImpl DiceRef::getRawDataRefImpl() const {
return DicePimpl;
}
inline const ObjectFile *DiceRef::getObjectFile() const {
return OwningObject;
}
} // end namespace object
} // end namespace llvm
#endif // LLVM_OBJECT_MACHO_H
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