SYS_EPOLL_PWAIT   = 22
	SYS_FCNTL         = 25
	SYS_MPROTECT      = 226
	SYS_EPOLL_PWAIT2  = 441
	SYS_EVENTFD2      = 19

	EFD_NONBLOCK = 0x800
)

type EpollEvent struct {
	Events    uint32
	pad_cgo_0 [4]byte
	Data      [8]byte // unaligned uintptr

	SYS_EPOLL_PWAIT   = 22
	SYS_FCNTL         = 25
	SYS_MPROTECT      = 226
	SYS_EPOLL_PWAIT2  = 441
	SYS_EVENTFD2      = 19

	EFD_NONBLOCK = 0x800
)

type EpollEvent struct {
	Events    uint32
	pad_cgo_0 [4]byte
	Data      [8]byte // unaligned uintptr

	SYS_EPOLL_CTL     = 4249
	SYS_EPOLL_PWAIT   = 4313
	SYS_EPOLL_CREATE1 = 4326
	SYS_EPOLL_PWAIT2  = 4441
	SYS_EVENTFD2      = 4325

	EFD_NONBLOCK = 0x80
)

type EpollEvent struct {
	Events    uint32
	pad_cgo_0 [4]byte
	Data      uint64

	_O_TRUNC    = 0x400

	_VM_REGION_BASIC_INFO_COUNT_64 = 0x9
	_VM_REGION_BASIC_INFO_64       = 0x9
)

type stackt struct {
	ss_sp     *byte
	ss_size   uintptr
	ss_flags  int32
	pad_cgo_0 [4]byte
}

type sigactiont struct {
	__sigaction_u [8]byte
	sa_tramp      unsafe.Pointer
	sa_mask       uint32
	sa_flags      int32
}

type usigactiont struct {
	__sigaction_u [8]byte

	_           [4]byte // EABI
	uc_mcontext mcontextt
	__uc_pad    [2]int32
}

type keventt struct {
	ident     uint64
	filter    uint32
	flags     uint32
	fflags    uint32
	pad_cgo_0 [4]byte
	data      int64
	udata     *byte
}

// created by cgo -cdefs and then converted to Go
// cgo -cdefs defs_netbsd.go defs_netbsd_arm.go

const (
	_REG_X0    = 0
	_REG_X1    = 1

	mc_spare2        [4]uint32
}

type ucontext struct {
	uc_sigmask  sigset
	uc_mcontext mcontext
	uc_link     *ucontext
	uc_stack    stackt
	uc_flags    int32
	__spare__   [4]int32
	pad_cgo_0   [12]byte
}

type timespec struct {
	tv_sec  int32
	tv_nsec int32
}

//go:nosplit
func (ts *timespec) setNsec(ns int64) {
	ts.tv_sec = timediv(ns, 1e9, &ts.tv_nsec)
}