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Package macho

import "debug/macho"
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Package macho implements access to Mach-O object files.

Constants

const (
    Magic32  uint32 = 0xfeedface
    Magic64  uint32 = 0xfeedfacf
    MagicFat uint32 = 0xcafebabe
)

Variables

ErrNotFat is returned from NewFatFile or OpenFat when the file is not a universal binary but may be a thin binary, based on its magic number.

var ErrNotFat = &FormatError{0, "not a fat Mach-O file", nil}

type Cpu

A Cpu is a Mach-O cpu type.

type Cpu uint32
const (
    Cpu386   Cpu = 7
    CpuAmd64 Cpu = Cpu386 | cpuArch64
    CpuArm   Cpu = 12
    CpuPpc   Cpu = 18
    CpuPpc64 Cpu = CpuPpc | cpuArch64
)

func (Cpu) GoString

func (i Cpu) GoString() string

func (Cpu) String

func (i Cpu) String() string

type Dylib

A Dylib represents a Mach-O load dynamic library command.

type Dylib struct {
    LoadBytes
    Name           string
    Time           uint32
    CurrentVersion uint32
    CompatVersion  uint32
}

type DylibCmd

A DylibCmd is a Mach-O load dynamic library command.

type DylibCmd struct {
    Cmd            LoadCmd
    Len            uint32
    Name           uint32
    Time           uint32
    CurrentVersion uint32
    CompatVersion  uint32
}

type Dysymtab

A Dysymtab represents a Mach-O dynamic symbol table command.

type Dysymtab struct {
    LoadBytes
    DysymtabCmd
    IndirectSyms []uint32 // indices into Symtab.Syms
}

type DysymtabCmd

A DysymtabCmd is a Mach-O dynamic symbol table command.

type DysymtabCmd struct {
    Cmd            LoadCmd
    Len            uint32
    Ilocalsym      uint32
    Nlocalsym      uint32
    Iextdefsym     uint32
    Nextdefsym     uint32
    Iundefsym      uint32
    Nundefsym      uint32
    Tocoffset      uint32
    Ntoc           uint32
    Modtaboff      uint32
    Nmodtab        uint32
    Extrefsymoff   uint32
    Nextrefsyms    uint32
    Indirectsymoff uint32
    Nindirectsyms  uint32
    Extreloff      uint32
    Nextrel        uint32
    Locreloff      uint32
    Nlocrel        uint32
}

type FatArch

A FatArch is a Mach-O File inside a FatFile.

type FatArch struct {
    FatArchHeader
    *File
}

type FatArchHeader

A FatArchHeader represents a fat header for a specific image architecture.

type FatArchHeader struct {
    Cpu    Cpu
    SubCpu uint32
    Offset uint32
    Size   uint32
    Align  uint32
}

type FatFile

A FatFile is a Mach-O universal binary that contains at least one architecture.

type FatFile struct {
    Magic  uint32
    Arches []FatArch
    // contains filtered or unexported fields
}

func NewFatFile

func NewFatFile(r io.ReaderAt) (*FatFile, error)

NewFatFile creates a new FatFile for accessing all the Mach-O images in a universal binary. The Mach-O binary is expected to start at position 0 in the ReaderAt.

func OpenFat

func OpenFat(name string) (*FatFile, error)

OpenFat opens the named file using os.Open and prepares it for use as a Mach-O universal binary.

func (*FatFile) Close

func (ff *FatFile) Close() error

type File

A File represents an open Mach-O file.

type File struct {
    FileHeader
    ByteOrder binary.ByteOrder
    Loads     []Load
    Sections  []*Section

    Symtab   *Symtab
    Dysymtab *Dysymtab
    // contains filtered or unexported fields
}

func NewFile

func NewFile(r io.ReaderAt) (*File, error)

NewFile creates a new File for accessing a Mach-O binary in an underlying reader. The Mach-O binary is expected to start at position 0 in the ReaderAt.

func Open

func Open(name string) (*File, error)

Open opens the named file using os.Open and prepares it for use as a Mach-O binary.

func (*File) Close

func (f *File) Close() error

Close closes the File. If the File was created using NewFile directly instead of Open, Close has no effect.

func (*File) DWARF

func (f *File) DWARF() (*dwarf.Data, error)

DWARF returns the DWARF debug information for the Mach-O file.

func (*File) ImportedLibraries

func (f *File) ImportedLibraries() ([]string, error)

ImportedLibraries returns the paths of all libraries referred to by the binary f that are expected to be linked with the binary at dynamic link time.

func (*File) ImportedSymbols

func (f *File) ImportedSymbols() ([]string, error)

ImportedSymbols returns the names of all symbols referred to by the binary f that are expected to be satisfied by other libraries at dynamic load time.

func (*File) Section

func (f *File) Section(name string) *Section

Section returns the first section with the given name, or nil if no such section exists.

func (*File) Segment

func (f *File) Segment(name string) *Segment

Segment returns the first Segment with the given name, or nil if no such segment exists.

type FileHeader

A FileHeader represents a Mach-O file header.

type FileHeader struct {
    Magic  uint32
    Cpu    Cpu
    SubCpu uint32
    Type   Type
    Ncmd   uint32
    Cmdsz  uint32
    Flags  uint32
}

type FormatError

FormatError is returned by some operations if the data does not have the correct format for an object file.

type FormatError struct {
    // contains filtered or unexported fields
}

func (*FormatError) Error

func (e *FormatError) Error() string

type Load

A Load represents any Mach-O load command.

type Load interface {
    Raw() []byte
}

type LoadBytes

A LoadBytes is the uninterpreted bytes of a Mach-O load command.

type LoadBytes []byte

func (LoadBytes) Raw

func (b LoadBytes) Raw() []byte

type LoadCmd

A LoadCmd is a Mach-O load command.

type LoadCmd uint32
const (
    LoadCmdSegment    LoadCmd = 1
    LoadCmdSymtab     LoadCmd = 2
    LoadCmdThread     LoadCmd = 4
    LoadCmdUnixThread LoadCmd = 5 // thread+stack
    LoadCmdDysymtab   LoadCmd = 11
    LoadCmdDylib      LoadCmd = 12
    LoadCmdDylinker   LoadCmd = 15
    LoadCmdSegment64  LoadCmd = 25
)

func (LoadCmd) GoString

func (i LoadCmd) GoString() string

func (LoadCmd) String

func (i LoadCmd) String() string

type Nlist32

An Nlist32 is a Mach-O 32-bit symbol table entry.

type Nlist32 struct {
    Name  uint32
    Type  uint8
    Sect  uint8
    Desc  uint16
    Value uint32
}

type Nlist64

An Nlist64 is a Mach-O 64-bit symbol table entry.

type Nlist64 struct {
    Name  uint32
    Type  uint8
    Sect  uint8
    Desc  uint16
    Value uint64
}

type Regs386

Regs386 is the Mach-O 386 register structure.

type Regs386 struct {
    AX    uint32
    BX    uint32
    CX    uint32
    DX    uint32
    DI    uint32
    SI    uint32
    BP    uint32
    SP    uint32
    SS    uint32
    FLAGS uint32
    IP    uint32
    CS    uint32
    DS    uint32
    ES    uint32
    FS    uint32
    GS    uint32
}

type RegsAMD64

RegsAMD64 is the Mach-O AMD64 register structure.

type RegsAMD64 struct {
    AX    uint64
    BX    uint64
    CX    uint64
    DX    uint64
    DI    uint64
    SI    uint64
    BP    uint64
    SP    uint64
    R8    uint64
    R9    uint64
    R10   uint64
    R11   uint64
    R12   uint64
    R13   uint64
    R14   uint64
    R15   uint64
    IP    uint64
    FLAGS uint64
    CS    uint64
    FS    uint64
    GS    uint64
}

type Section

type Section struct {
    SectionHeader

    // Embed ReaderAt for ReadAt method.
    // Do not embed SectionReader directly
    // to avoid having Read and Seek.
    // If a client wants Read and Seek it must use
    // Open() to avoid fighting over the seek offset
    // with other clients.
    io.ReaderAt
    // contains filtered or unexported fields
}

func (*Section) Data

func (s *Section) Data() ([]byte, error)

Data reads and returns the contents of the Mach-O section.

func (*Section) Open

func (s *Section) Open() io.ReadSeeker

Open returns a new ReadSeeker reading the Mach-O section.

type Section32

A Section32 is a 32-bit Mach-O section header.

type Section32 struct {
    Name     [16]byte
    Seg      [16]byte
    Addr     uint32
    Size     uint32
    Offset   uint32
    Align    uint32
    Reloff   uint32
    Nreloc   uint32
    Flags    uint32
    Reserve1 uint32
    Reserve2 uint32
}

type Section64

A Section64 is a 64-bit Mach-O section header.

type Section64 struct {
    Name     [16]byte
    Seg      [16]byte
    Addr     uint64
    Size     uint64
    Offset   uint32
    Align    uint32
    Reloff   uint32
    Nreloc   uint32
    Flags    uint32
    Reserve1 uint32
    Reserve2 uint32
    Reserve3 uint32
}

type SectionHeader

type SectionHeader struct {
    Name   string
    Seg    string
    Addr   uint64
    Size   uint64
    Offset uint32
    Align  uint32
    Reloff uint32
    Nreloc uint32
    Flags  uint32
}

type Segment

A Segment represents a Mach-O 32-bit or 64-bit load segment command.

type Segment struct {
    LoadBytes
    SegmentHeader

    // Embed ReaderAt for ReadAt method.
    // Do not embed SectionReader directly
    // to avoid having Read and Seek.
    // If a client wants Read and Seek it must use
    // Open() to avoid fighting over the seek offset
    // with other clients.
    io.ReaderAt
    // contains filtered or unexported fields
}

func (*Segment) Data

func (s *Segment) Data() ([]byte, error)

Data reads and returns the contents of the segment.

func (*Segment) Open

func (s *Segment) Open() io.ReadSeeker

Open returns a new ReadSeeker reading the segment.

type Segment32

A Segment32 is a 32-bit Mach-O segment load command.

type Segment32 struct {
    Cmd     LoadCmd
    Len     uint32
    Name    [16]byte
    Addr    uint32
    Memsz   uint32
    Offset  uint32
    Filesz  uint32
    Maxprot uint32
    Prot    uint32
    Nsect   uint32
    Flag    uint32
}

type Segment64

A Segment64 is a 64-bit Mach-O segment load command.

type Segment64 struct {
    Cmd     LoadCmd
    Len     uint32
    Name    [16]byte
    Addr    uint64
    Memsz   uint64
    Offset  uint64
    Filesz  uint64
    Maxprot uint32
    Prot    uint32
    Nsect   uint32
    Flag    uint32
}

type SegmentHeader

A SegmentHeader is the header for a Mach-O 32-bit or 64-bit load segment command.

type SegmentHeader struct {
    Cmd     LoadCmd
    Len     uint32
    Name    string
    Addr    uint64
    Memsz   uint64
    Offset  uint64
    Filesz  uint64
    Maxprot uint32
    Prot    uint32
    Nsect   uint32
    Flag    uint32
}

type Symbol

A Symbol is a Mach-O 32-bit or 64-bit symbol table entry.

type Symbol struct {
    Name  string
    Type  uint8
    Sect  uint8
    Desc  uint16
    Value uint64
}

type Symtab

A Symtab represents a Mach-O symbol table command.

type Symtab struct {
    LoadBytes
    SymtabCmd
    Syms []Symbol
}

type SymtabCmd

A SymtabCmd is a Mach-O symbol table command.

type SymtabCmd struct {
    Cmd     LoadCmd
    Len     uint32
    Symoff  uint32
    Nsyms   uint32
    Stroff  uint32
    Strsize uint32
}

type Thread

A Thread is a Mach-O thread state command.

type Thread struct {
    Cmd  LoadCmd
    Len  uint32
    Type uint32
    Data []uint32
}

type Type

A Type is the Mach-O file type, e.g. an object file, executable, or dynamic library.

type Type uint32
const (
    TypeObj    Type = 1
    TypeExec   Type = 2
    TypeDylib  Type = 6
    TypeBundle Type = 8
)