go/src/cmd/internal/buildid/note.go

func readAligned4(r io.Reader, sz int32) ([]byte, error) { … }

func ReadELFNote(filename, name string, typ int32) ([]byte, error) { … }

var elfGoNote …

var elfGNUNote …

// The Go build ID is stored in a note described by an ELF PT_NOTE prog
// header. The caller has already opened filename, to get f, and read
// at least 4 kB out, in data.
func readELF(name string, f *os.File, data []byte) (buildid string, err error) { … }

// The Go build ID is stored at the beginning of the Mach-O __text segment.
// The caller has already opened filename, to get f, and read a few kB out, in data.
// Sadly, that's not guaranteed to hold the note, because there is an arbitrary amount
// of other junk placed in the file ahead of the main text.
func readMacho(name string, f *os.File, data []byte) (buildid string, err error) { … }