if r1 == 0 {
		err = errnoErr(e1)
	}
	return
}

func ImpersonateSelf(impersonationlevel uint32) (err error) {
	r1, _, e1 := syscall.Syscall(procImpersonateSelf.Addr(), 1, uintptr(impersonationlevel), 0, 0)

		p.errorf("%s: expected immediate constant; found %s", op, obj.Dconv(prog, addr))
	}
	return addr.Offset
}

// getRegister checks that addr represents a register and returns its value.
func (p *Parser) getRegister(prog *obj.Prog, op obj.As, addr *obj.Addr) int16 {
	if addr.Type != obj.TYPE_REG || addr.Offset != 0 || addr.Name != 0 || addr.Index != 0 {

	MOVD	$__tsan_write_pc(SB), R1
	LMG	addr+0(FP), R3, R5
	JMP	racecalladdr<>(SB)

// func runtime·racereadrange(addr, size uintptr)
// Called from instrumented code.
TEXT	runtime·racereadrange(SB), NOSPLIT, $0-16
	// void __tsan_read_range(ThreadState *thr, void *addr, uintptr size, void *pc);
	MOVD	$__tsan_read_range(SB), R1
	LMG	addr+0(FP), R3, R4
	MOVD	R14, R5
	JMP	racecalladdr<>(SB)

}

func PtracePeekText(pid int, addr uintptr, out []byte) (count int, err error) {
	return ptracePeek(pid, addr, out)
}

func PtracePeekData(pid int, addr uintptr, out []byte) (count int, err error) {
	return ptracePeek(pid, addr, out)
}

func ptracePoke(pid int, addr uintptr, data []byte) (count int, err error) {
	n := 0
	for len(data) > 0 {
		bsize := len(data)
		if bsize > 1024 {
			bsize = 1024
		}

// R4 = TODO: What's this supposed to be?
// R5 = caller pc
// R6 = addr of incoming arg list
// R8 contains addr of target function.
TEXT	racecallatomic<>(SB), NOSPLIT, $0-0
	// Trigger SIGSEGV early if address passed to atomic function is bad.
	MOVD	(R6), R7	// 1st arg is addr
	MOVB	(R7), R9	// segv here if addr is bad
	// Check that addr is within [arenastart, arenaend) or within [racedatastart, racedataend).

			return ip
		}
	}

	switch addr := addr.(type) {
	case *TCPAddr:
		ip := convertIP(addr.IP)
		if ip == nil || len(ip) == len(addr.IP) {
			return addr
		}
		return &TCPAddr{IP: ip, Port: addr.Port, Zone: addr.Zone}
	case *UDPAddr:
		ip := convertIP(addr.IP)
		if ip == nil || len(ip) == len(addr.IP) {
			return addr
		}
		return &UDPAddr{IP: ip, Port: addr.Port, Zone: addr.Zone}
	default:

TEXT	runtime·RaceRead(SB), NOSPLIT, $0-8
	// This needs to be a tail call, because raceread reads caller pc.
	JMP	runtime·raceread(SB)

// void runtime·racereadpc(void *addr, void *callpc, void *pc)
TEXT	runtime·racereadpc(SB), NOSPLIT, $0-24
	MOVQ	addr+0(FP), RARG1
	MOVQ	callpc+8(FP), RARG2
	MOVQ	pc+16(FP), RARG3
	ADDQ	$1, RARG3 // pc is function start, tsan wants return address

	// network address.
	Source Addr

	// Addr is the network address for which this error occurred.
	// For local operations, like Listen or SetDeadline, Addr is
	// the address of the local endpoint being manipulated.
	// For operations involving a remote network connection, like
	// Dial, Read, or Write, Addr is the remote address of that
	// connection.
	Addr Addr

		network := addr.Workload.Network
		for _, workloadAddr := range addr.Workload.Addresses {
			ip, _ := netip.AddrFromSlice(workloadAddr)
			aliases = append(aliases, network+"/"+ip.String())
		}
		return aliases
	case *workloadapi.Address_Service:
		aliases := make([]string, 0, len(addr.Service.Addresses))
		for _, networkAddr := range addr.Service.Addresses {

			return addrs[0], outcome, err
		}, getAddressTimeout, getAddressDelay)
		if err != nil {
			return netip.AddrPort{}, err
		}
		addr = address.(netip.AddrPort)
	} else {
		name := types.NamespacedName{Name: eastWestIngressServiceName, Namespace: i.cfg.SystemNamespace}
		addr = i.CustomIngressFor(primary, name, eastWestIngressIstioLabel).DiscoveryAddresses()[0]
	}