return 2
		case &Segdata:
			if Segrelrodata.Length > 0 {
				return 3
			}
			return 2
		}
		panic("unknown segment")
	}

	dylibId := func(s loader.Sym) int {
		slib := ldr.SymDynimplib(s)
		for i, lib := range dylib {
			if lib == slib {
				return i + 1
			}
		}
		return BIND_SPECIAL_DYLIB_FLAT_LOOKUP // don't know where it is from
	}

	// Rebase table.

		Indirectsymoff uint32
		Nindirectsyms  uint32
		Extreloff      uint32
		Nextrel        uint32
		Locreloff      uint32
		Nlocrel        uint32
	}

	// A DylibCmd is a Mach-O load dynamic library command.
	DylibCmd struct {
		Cmd            LoadCmd
		Len            uint32
		Name           uint32
		Time           uint32
		CurrentVersion uint32
		CompatVersion  uint32
	}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Dup(fd int) (nfd int, err error) {
	r0, _, e1 := syscall(abi.FuncPCABI0(libc_dup_trampoline), uintptr(fd), 0, 0)
	nfd = int(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

func libc_dup_trampoline()

//go:cgo_import_dynamic libc_dup dup "/usr/lib/libSystem.B.dylib"

//go:cgo_import_dynamic libc_exchangedata exchangedata "/usr/lib/libSystem.B.dylib"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Exit(code int) {
	syscall_syscall(libc_exit_trampoline_addr, uintptr(code), 0, 0)
	return
}

var libc_exit_trampoline_addr uintptr

//go:cgo_import_dynamic libc_exit exit "/usr/lib/libSystem.B.dylib"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Dup(fd int) (nfd int, err error) {
	r0, _, e1 := syscall(abi.FuncPCABI0(libc_dup_trampoline), uintptr(fd), 0, 0)
	nfd = int(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

func libc_dup_trampoline()

//go:cgo_import_dynamic libc_dup dup "/usr/lib/libSystem.B.dylib"

//go:cgo_import_dynamic libc_exchangedata exchangedata "/usr/lib/libSystem.B.dylib"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Exit(code int) {
	syscall_syscall(libc_exit_trampoline_addr, uintptr(code), 0, 0)
	return
}

var libc_exit_trampoline_addr uintptr

//go:cgo_import_dynamic libc_exit exit "/usr/lib/libSystem.B.dylib"

        expect:
        os.sharedLibrarySuffix == ".dylib"
        os.linkLibrarySuffix == ".dylib"
        os.getSharedLibraryName("a.dylib") == "a.dylib"
        os.getSharedLibraryName("liba.dylib") == "liba.dylib"
        os.getSharedLibraryName("a") == "liba.dylib"
        os.getSharedLibraryName("lib1") == "liblib1.dylib"
        os.getSharedLibraryName("path/liba.dylib") == "path/liba.dylib"

)

//go:cgo_import_dynamic libc_grantpt grantpt "/usr/lib/libSystem.B.dylib"
func libc_grantpt_trampoline()

func Grantpt(fd int) error {
	_, _, errno := syscall_syscall6(abi.FuncPCABI0(libc_grantpt_trampoline), uintptr(fd), 0, 0, 0, 0, 0)
	if errno != 0 {
		return errno
	}
	return nil
}

//go:cgo_import_dynamic libc_unlockpt unlockpt "/usr/lib/libSystem.B.dylib"
func libc_unlockpt_trampoline()

func Unlockpt(fd int) error {

//go:cgo_import_dynamic libc_pthread_kill pthread_kill "/usr/lib/libSystem.B.dylib"
//go:cgo_import_dynamic libc_exit _exit "/usr/lib/libSystem.B.dylib"
//go:cgo_import_dynamic libc_raise raise "/usr/lib/libSystem.B.dylib"

//go:cgo_import_dynamic libc_open open "/usr/lib/libSystem.B.dylib"
//go:cgo_import_dynamic libc_close close "/usr/lib/libSystem.B.dylib"
//go:cgo_import_dynamic libc_read read "/usr/lib/libSystem.B.dylib"

			l.Path = cstring(cmddat[hdr.Path:])
			l.LoadBytes = LoadBytes(cmddat)
			f.Loads = append(f.Loads, l)

		case LoadCmdDylib:
			var hdr DylibCmd
			b := bytes.NewReader(cmddat)
			if err := binary.Read(b, bo, &hdr); err != nil {
				return nil, err
			}
			l := new(Dylib)
			if hdr.Name >= uint32(len(cmddat)) {
				return nil, &FormatError{offset, "invalid name in dynamic library command", hdr.Name}
			}