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287 lines
11 KiB
C++
287 lines
11 KiB
C++
//===- MachO.h - MachO object file implementation ---------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the MachOObjectFile class, which implement the ObjectFile
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// interface for MachO files.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_OBJECT_MACHO_H
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#define LLVM_OBJECT_MACHO_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Support/MachO.h"
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namespace llvm {
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namespace object {
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/// DiceRef - This is a value type class that represents a single
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/// data in code entry in the table in a Mach-O object file.
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class DiceRef {
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DataRefImpl DicePimpl;
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const ObjectFile *OwningObject;
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public:
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DiceRef() : OwningObject(NULL) { }
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DiceRef(DataRefImpl DiceP, const ObjectFile *Owner);
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bool operator==(const DiceRef &Other) const;
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bool operator<(const DiceRef &Other) const;
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void moveNext();
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error_code getOffset(uint32_t &Result) const;
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error_code getLength(uint16_t &Result) const;
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error_code getKind(uint16_t &Result) const;
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DataRefImpl getRawDataRefImpl() const;
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const ObjectFile *getObjectFile() const;
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};
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typedef content_iterator<DiceRef> dice_iterator;
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class MachOObjectFile : public ObjectFile {
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public:
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struct LoadCommandInfo {
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const char *Ptr; // Where in memory the load command is.
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MachO::load_command C; // The command itself.
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};
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MachOObjectFile(MemoryBuffer *Object, bool IsLittleEndian, bool Is64Bits,
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error_code &EC, bool BufferOwned = true);
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void moveSymbolNext(DataRefImpl &Symb) const LLVM_OVERRIDE;
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error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const
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LLVM_OVERRIDE;
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error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const
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LLVM_OVERRIDE;
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error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const
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LLVM_OVERRIDE;
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error_code getSymbolAlignment(DataRefImpl Symb, uint32_t &Res) const
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LLVM_OVERRIDE;
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error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const LLVM_OVERRIDE;
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error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const
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LLVM_OVERRIDE;
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uint32_t getSymbolFlags(DataRefImpl Symb) const LLVM_OVERRIDE;
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error_code getSymbolSection(DataRefImpl Symb, section_iterator &Res) const
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LLVM_OVERRIDE;
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error_code getSymbolValue(DataRefImpl Symb, uint64_t &Val) const
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LLVM_OVERRIDE;
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void moveSectionNext(DataRefImpl &Sec) const LLVM_OVERRIDE;
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error_code getSectionName(DataRefImpl Sec, StringRef &Res) const
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LLVM_OVERRIDE;
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error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const
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LLVM_OVERRIDE;
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error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const LLVM_OVERRIDE;
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error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const
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LLVM_OVERRIDE;
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error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const
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LLVM_OVERRIDE;
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error_code isSectionText(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
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error_code isSectionData(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
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error_code isSectionBSS(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
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error_code isSectionRequiredForExecution(DataRefImpl Sec, bool &Res) const
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LLVM_OVERRIDE;
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error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
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error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const LLVM_OVERRIDE;
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error_code isSectionReadOnlyData(DataRefImpl Sec, bool &Res) const
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LLVM_OVERRIDE;
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error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
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bool &Result) const LLVM_OVERRIDE;
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relocation_iterator section_rel_begin(DataRefImpl Sec) const LLVM_OVERRIDE;
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relocation_iterator section_rel_end(DataRefImpl Sec) const LLVM_OVERRIDE;
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void moveRelocationNext(DataRefImpl &Rel) const LLVM_OVERRIDE;
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error_code getRelocationAddress(DataRefImpl Rel, uint64_t &Res) const
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LLVM_OVERRIDE;
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error_code getRelocationOffset(DataRefImpl Rel, uint64_t &Res) const
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LLVM_OVERRIDE;
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symbol_iterator getRelocationSymbol(DataRefImpl Rel) const LLVM_OVERRIDE;
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error_code getRelocationType(DataRefImpl Rel, uint64_t &Res) const
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LLVM_OVERRIDE;
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error_code getRelocationTypeName(DataRefImpl Rel,
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SmallVectorImpl<char> &Result) const
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LLVM_OVERRIDE;
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error_code getRelocationValueString(DataRefImpl Rel,
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SmallVectorImpl<char> &Result) const
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LLVM_OVERRIDE;
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error_code getRelocationHidden(DataRefImpl Rel, bool &Result) const
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LLVM_OVERRIDE;
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error_code getLibraryNext(DataRefImpl LibData, LibraryRef &Res) const
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LLVM_OVERRIDE;
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error_code getLibraryPath(DataRefImpl LibData, StringRef &Res) const
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LLVM_OVERRIDE;
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// TODO: Would be useful to have an iterator based version
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// of the load command interface too.
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symbol_iterator symbol_begin() const LLVM_OVERRIDE;
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symbol_iterator symbol_end() const LLVM_OVERRIDE;
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section_iterator section_begin() const LLVM_OVERRIDE;
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section_iterator section_end() const LLVM_OVERRIDE;
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library_iterator needed_library_begin() const LLVM_OVERRIDE;
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library_iterator needed_library_end() const LLVM_OVERRIDE;
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uint8_t getBytesInAddress() const LLVM_OVERRIDE;
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StringRef getFileFormatName() const LLVM_OVERRIDE;
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unsigned getArch() const LLVM_OVERRIDE;
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StringRef getLoadName() const LLVM_OVERRIDE;
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relocation_iterator section_rel_begin(unsigned Index) const;
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relocation_iterator section_rel_end(unsigned Index) const;
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dice_iterator begin_dices() const;
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dice_iterator end_dices() const;
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// In a MachO file, sections have a segment name. This is used in the .o
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// files. They have a single segment, but this field specifies which segment
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// a section should be put in in the final object.
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StringRef getSectionFinalSegmentName(DataRefImpl Sec) const;
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// Names are stored as 16 bytes. These returns the raw 16 bytes without
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// interpreting them as a C string.
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ArrayRef<char> getSectionRawName(DataRefImpl Sec) const;
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ArrayRef<char> getSectionRawFinalSegmentName(DataRefImpl Sec) const;
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// MachO specific Info about relocations.
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bool isRelocationScattered(const MachO::any_relocation_info &RE) const;
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unsigned getPlainRelocationSymbolNum(
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const MachO::any_relocation_info &RE) const;
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bool getPlainRelocationExternal(const MachO::any_relocation_info &RE) const;
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bool getScatteredRelocationScattered(
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const MachO::any_relocation_info &RE) const;
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uint32_t getScatteredRelocationValue(
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const MachO::any_relocation_info &RE) const;
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unsigned getAnyRelocationAddress(const MachO::any_relocation_info &RE) const;
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unsigned getAnyRelocationPCRel(const MachO::any_relocation_info &RE) const;
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unsigned getAnyRelocationLength(const MachO::any_relocation_info &RE) const;
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unsigned getAnyRelocationType(const MachO::any_relocation_info &RE) const;
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SectionRef getRelocationSection(const MachO::any_relocation_info &RE) const;
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// Walk load commands.
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LoadCommandInfo getFirstLoadCommandInfo() const;
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LoadCommandInfo getNextLoadCommandInfo(const LoadCommandInfo &L) const;
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// MachO specific structures.
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MachO::section getSection(DataRefImpl DRI) const;
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MachO::section_64 getSection64(DataRefImpl DRI) const;
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MachO::section getSection(const LoadCommandInfo &L, unsigned Index) const;
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MachO::section_64 getSection64(const LoadCommandInfo &L,unsigned Index) const;
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MachO::nlist getSymbolTableEntry(DataRefImpl DRI) const;
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MachO::nlist_64 getSymbol64TableEntry(DataRefImpl DRI) const;
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MachO::linkedit_data_command
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getLinkeditDataLoadCommand(const LoadCommandInfo &L) const;
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MachO::segment_command
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getSegmentLoadCommand(const LoadCommandInfo &L) const;
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MachO::segment_command_64
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getSegment64LoadCommand(const LoadCommandInfo &L) const;
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MachO::linker_options_command
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getLinkerOptionsLoadCommand(const LoadCommandInfo &L) const;
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MachO::any_relocation_info getRelocation(DataRefImpl Rel) const;
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MachO::data_in_code_entry getDice(DataRefImpl Rel) const;
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MachO::mach_header getHeader() const;
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MachO::mach_header_64 getHeader64() const;
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uint32_t
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getIndirectSymbolTableEntry(const MachO::dysymtab_command &DLC,
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unsigned Index) const;
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MachO::data_in_code_entry getDataInCodeTableEntry(uint32_t DataOffset,
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unsigned Index) const;
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MachO::symtab_command getSymtabLoadCommand() const;
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MachO::dysymtab_command getDysymtabLoadCommand() const;
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MachO::linkedit_data_command getDataInCodeLoadCommand() const;
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StringRef getStringTableData() const;
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bool is64Bit() const;
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void ReadULEB128s(uint64_t Index, SmallVectorImpl<uint64_t> &Out) const;
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static Triple::ArchType getArch(uint32_t CPUType);
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static bool classof(const Binary *v) {
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return v->isMachO();
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}
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private:
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typedef SmallVector<const char*, 1> SectionList;
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SectionList Sections;
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const char *SymtabLoadCmd;
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const char *DysymtabLoadCmd;
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const char *DataInCodeLoadCmd;
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};
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/// DiceRef
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inline DiceRef::DiceRef(DataRefImpl DiceP, const ObjectFile *Owner)
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: DicePimpl(DiceP) , OwningObject(Owner) {}
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inline bool DiceRef::operator==(const DiceRef &Other) const {
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return DicePimpl == Other.DicePimpl;
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}
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inline bool DiceRef::operator<(const DiceRef &Other) const {
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return DicePimpl < Other.DicePimpl;
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}
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inline void DiceRef::moveNext() {
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const MachO::data_in_code_entry *P =
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reinterpret_cast<const MachO::data_in_code_entry *>(DicePimpl.p);
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DicePimpl.p = reinterpret_cast<uintptr_t>(P + 1);
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}
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// Since a Mach-O data in code reference, a DiceRef, can only be created when
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// the OwningObject ObjectFile is a MachOObjectFile a static_cast<> is used for
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// the methods that get the values of the fields of the reference.
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inline error_code DiceRef::getOffset(uint32_t &Result) const {
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const MachOObjectFile *MachOOF =
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static_cast<const MachOObjectFile *>(OwningObject);
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MachO::data_in_code_entry Dice = MachOOF->getDice(DicePimpl);
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Result = Dice.offset;
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return object_error::success;
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}
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inline error_code DiceRef::getLength(uint16_t &Result) const {
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const MachOObjectFile *MachOOF =
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static_cast<const MachOObjectFile *>(OwningObject);
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MachO::data_in_code_entry Dice = MachOOF->getDice(DicePimpl);
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Result = Dice.length;
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return object_error::success;
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}
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inline error_code DiceRef::getKind(uint16_t &Result) const {
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const MachOObjectFile *MachOOF =
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static_cast<const MachOObjectFile *>(OwningObject);
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MachO::data_in_code_entry Dice = MachOOF->getDice(DicePimpl);
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Result = Dice.kind;
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return object_error::success;
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}
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inline DataRefImpl DiceRef::getRawDataRefImpl() const {
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return DicePimpl;
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}
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inline const ObjectFile *DiceRef::getObjectFile() const {
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return OwningObject;
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}
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}
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}
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#endif
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