plan9obj

Documentation

Overview

Package plan9obj implements access to Plan 9 a.out object files.

Index

• Constants
• type File
  • func NewFile(r io.ReaderAt) (*File, error)
  • func Open(name string) (*File, error)
  • func (f *File) Close() error
  • func (f *File) Section(name string) *Section
  • func (f *File) Symbols() ([]Sym, error)
• type FileHeader
• type Section
  • func (s *Section) Data() ([]byte, error)
  • func (s *Section) Open() io.ReadSeeker
• type SectionHeader
• type Sym

Constants

const (
	Magic64 = 0x8000 // 64-bit expanded header

	Magic386   = (4*11+0)*11 + 7
	MagicAMD64 = (4*26+0)*26 + 7 + Magic64
	MagicARM   = (4*20+0)*20 + 7
)

Types

type File

type File struct {
	FileHeader
	Sections []*Section
	// contains filtered or unexported fields
}

A File represents an open Plan 9 a.out file.

func NewFile

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

NewFile creates a new File for accessing a Plan 9 binary in an underlying reader. The Plan 9 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 Plan 9 a.out 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) Section

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

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

func (*File) Symbols

func (f *File) Symbols() ([]Sym, error)

Symbols returns the symbol table for f.

type FileHeader

type FileHeader struct {
	Magic       uint32
	Bss         uint32
	Entry       uint64
	PtrSize     int
	LoadAddress uint64
	HdrSize     uint64
}

A FileHeader represents a Plan 9 a.out file header.

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
}

A Section represents a single section in a Plan 9 a.out file.

func (*Section) Data

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

Data reads and returns the contents of the Plan 9 a.out section.

func (*Section) Open

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

Open returns a new ReadSeeker reading the Plan 9 a.out section.

type SectionHeader

type SectionHeader struct {
	Name   string
	Size   uint32
	Offset uint32
}

A SectionHeader represents a single Plan 9 a.out section header. This structure doesn't exist on-disk, but eases navigation through the object file.

type Sym

type Sym struct {
	Value uint64
	Type  rune
	Name  string
}

A Symbol represents an entry in a Plan 9 a.out symbol table section.