return 0, -(i + 1) // overflow
			}
			return x | uint64(b)<<s, i + 1
		}
		x |= uint64(b&0x7f) << s
		s += 7
	}
	return 0, 0
}

// AppendVarint appends the varint-encoded form of x,
// as generated by [PutVarint], to buf and returns the extended buffer.
func AppendVarint(buf []byte, x int64) []byte {
	ux := uint64(x) << 1
	if x < 0 {
		ux = ^ux
	}
	return AppendUvarint(buf, ux)
}

	return decodeMessage(&b, m)
}

func le64(p []byte) uint64 {
	return uint64(p[0]) | uint64(p[1])<<8 | uint64(p[2])<<16 | uint64(p[3])<<24 | uint64(p[4])<<32 | uint64(p[5])<<40 | uint64(p[6])<<48 | uint64(p[7])<<56
}

func le32(p []byte) uint32 {
	return uint32(p[0]) | uint32(p[1])<<8 | uint32(p[2])<<16 | uint32(p[3])<<24
}

func decodeVarint(data []byte) (uint64, []byte, error) {
	var i int
	var u uint64

	Birthtimespec Timespec
	Size          int64
	Blocks        int64
	Blksize       int32
	Flags         uint32
	Gen           uint64
	Spare         [10]uint64
}

type Statfs_t struct {
	Version     uint32
	Type        uint32
	Flags       uint64
	Bsize       uint64
	Iosize      uint64
	Blocks      uint64
	Bfree       uint64
	Bavail      int64
	Files       uint64
	Ffree       int64

	init6_384 = 0xdb0c2e0d64f98fa7
	init7_384 = 0x47b5481dbefa4fa4
)

// digest represents the partial evaluation of a checksum.
type digest struct {
	h        [8]uint64
	x        [chunk]byte
	nx       int
	len      uint64
	function crypto.Hash
}

func (d *digest) Reset() {
	switch d.function {
	case crypto.SHA384:
		d.h[0] = init0_384
		d.h[1] = init1_384
		d.h[2] = init2_384

	return Timeval{Sec: sec, Usec: usec}
}

func (r *PtraceRegs) PC() uint64 { return r.Nip }

func (r *PtraceRegs) SetPC(pc uint64) { r.Nip = pc }

func (iov *Iovec) SetLen(length int) {
	iov.Len = uint64(length)
}

func (msghdr *Msghdr) SetControllen(length int) {
	msghdr.Controllen = uint64(length)
}

func (msghdr *Msghdr) SetIovlen(length int) {
	msghdr.Iovlen = uint64(length)
}

func setTimespec(sec, nsec int64) Timespec {
	return Timespec{Sec: sec, Nsec: nsec}
}

func setTimeval(sec, usec int64) Timeval {
	return Timeval{Sec: sec, Usec: int32(usec)}
}

func (r *PtraceRegs) PC() uint64 { return r.Tpc }

func (r *PtraceRegs) SetPC(pc uint64) { r.Tpc = pc }

func (iov *Iovec) SetLen(length int) {
	iov.Len = uint64(length)
}

	__extctx_magic int32
	__pad          int32
}

type context64 struct {
	gpr        [32]uint64
	msr        uint64
	iar        uint64
	lr         uint64
	ctr        uint64
	cr         uint32
	xer        uint32
	fpscr      uint32
	fpscrx     uint32
	except     [1]uint64
	fpr        [32]float64
	fpeu       uint8
	fpinfo     uint8
	fpscr24_31 uint8
	pad        [1]uint8

	t.Run("14", testdiv(14, func(n uint64) (uint64, uint64) { return n / 14, n % 14 }))
	t.Run("15", testdiv(15, func(n uint64) (uint64, uint64) { return n / 15, n % 15 }))
	t.Run("16", testdiv(16, func(n uint64) (uint64, uint64) { return n / 16, n % 16 }))
	t.Run("17", testdiv(17, func(n uint64) (uint64, uint64) { return n / 17, n % 17 }))

func makedev(major uint32, minor uint32) uint64 {
	majorH := uint64(major >> 12)
	majorL := uint64(major & 0xfff)
	minorH := uint64(minor >> 8)
	minorL := uint64(minor & 0xff)
	return (majorH << 44) | (minorH << 20) | (majorL << 8) | minorL
}

func timespecFromStatxTimestamp(x statxTimestamp) Timespec {
	return Timespec{
		Sec:  x.Sec,
		Nsec: int64(x.Nsec),
	}
}

	_SIGEV_THREAD_ID = 0x4
)

type timespec struct {
	tv_sec  int64
	tv_nsec int64
}

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

type timeval struct {
	tv_sec  int64
	tv_usec int64
}

func (tv *timeval) set_usec(x int32) {
	tv.tv_usec = int64(x)
}

type itimerspec struct {
	it_interval timespec