t = t.Elem()
	}
	if t.IsArray() {
		n.SetBounded(bounded(r, t.NumElem()))
		if base.Flag.LowerM != 0 && n.Bounded() && !ir.IsConst(n.Index, constant.Int) {
			base.Warn("index bounds check elided")
		}
	} else if ir.IsConst(n.X, constant.String) {
		n.SetBounded(bounded(r, int64(len(ir.StringVal(n.X)))))
		if base.Flag.LowerM != 0 && n.Bounded() && !ir.IsConst(n.Index, constant.Int) {
			base.Warn("index bounds check elided")
		}

		if s != "" {
			return s
		}
	}
	return "errno " + itoa.Itoa(int(e))
}

func (e Errno) Is(target error) bool {
	switch target {
	case oserror.ErrPermission:
		return e == EACCES || e == EPERM
	case oserror.ErrExist:
		return e == EEXIST || e == ENOTEMPTY
	case oserror.ErrNotExist:
		return e == ENOENT
	case errorspkg.ErrUnsupported:
		return e == ENOSYS || e == ENOTSUP || e == EOPNOTSUPP
	}

// KeyctlSetperm implements the KEYCTL_SETPERM command. The perm value is the
// key handle permission mask as described in the "keyctl setperm" section of
// http://man7.org/linux/man-pages/man1/keyctl.1.html.
// See the full documentation at:
// http://man7.org/linux/man-pages/man3/keyctl_setperm.3.html
func KeyctlSetperm(id int, perm uint32) error {
	_, err := KeyctlInt(KEYCTL_SETPERM, id, int(perm), 0, 0)
	return err
}

	Key  int32
	Uid  uint32
	Gid  uint32
	Cuid uint32
	Cgid uint32
	Mode uint32
	_    [0]uint8
	Seq  uint16
	_    uint16
	_    uint64
	_    uint64
}
type SysvShmDesc struct {
	Perm   SysvIpcPerm
	Segsz  uint64
	Atime  int64
	Dtime  int64
	Ctime  int64
	Cpid   int32
	Lpid   int32
	Nattch uint64
	_      uint64
	_      uint64

	Key  int32
	Uid  uint32
	Gid  uint32
	Cuid uint32
	Cgid uint32
	Mode uint32
	_    [0]uint8
	Seq  uint16
	_    uint16
	_    uint32
	_    uint32
}
type SysvShmDesc struct {
	Perm       SysvIpcPerm
	Segsz      uint32
	Atime      uint32
	Dtime      uint32
	Ctime      uint32
	Cpid       int32
	Lpid       int32
	Nattch     uint32
	Atime_high uint16
	Dtime_high uint16

type SysvIpcPerm struct {
	Key  int32
	Uid  uint32
	Gid  uint32
	Cuid uint32
	Cgid uint32
	Mode uint32
	Seq  uint32
	_    uint32
	_    uint64
	_    uint64
}
type SysvShmDesc struct {
	Perm   SysvIpcPerm
	Atime  int64
	Dtime  int64
	Ctime  int64
	Segsz  uint64
	Cpid   int32
	Lpid   int32
	Nattch uint64
	_      uint64
	_      uint64

	SIGXCPU   = syscall.Signal(0x18)
	SIGXFSZ   = syscall.Signal(0x19)
)

// Error table
var errorList = [...]struct {
	num  syscall.Errno
	name string
	desc string
}{
	{1, "EPERM", "operation not permitted"},
	{2, "ENOENT", "no such file or directory"},
	{3, "ESRCH", "no such process"},
	{4, "EINTR", "interrupted system call"},
	{5, "EIO", "input/output error"},

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

func Open(path string, mode int, perm uint32) (fd int, err error) {
	var _p0 *byte
	_p0, err = BytePtrFromString(path)
	if err != nil {
		return
	}
	r0, _, e1 := syscall(abi.FuncPCABI0(libc_open_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm))
	fd = int(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

	SIGXCPU   = syscall.Signal(0x18)
	SIGXFSZ   = syscall.Signal(0x19)
)

// Error table
var errorList = [...]struct {
	num  syscall.Errno
	name string
	desc string
}{
	{1, "EPERM", "operation not permitted"},
	{2, "ENOENT", "no such file or directory"},
	{3, "ESRCH", "no such process"},
	{4, "EINTR", "interrupted system call"},
	{5, "EIO", "input/output error"},

	SIGXCPU   = syscall.Signal(0x18)
	SIGXFSZ   = syscall.Signal(0x19)
)

// Error table
var errorList = [...]struct {
	num  syscall.Errno
	name string
	desc string
}{
	{1, "EPERM", "operation not permitted"},
	{2, "ENOENT", "no such file or directory"},
	{3, "ESRCH", "no such process"},
	{4, "EINTR", "interrupted system call"},
	{5, "EIO", "input/output error"},