oid := [2]uint32{_CTL_QUERY, _CTL_QUERY_MIB}
	miblen := uintptr(_CTL_MAXNAME)
	if sysctl(&oid[0], 2, (*byte)(unsafe.Pointer(mib)), &miblen, (*byte)(unsafe.Pointer(&name[0])), (uintptr)(len(name))) < 0 {
		return 0
	}
	miblen /= unsafe.Sizeof(uint32(0))
	if miblen <= 0 {
		return 0
	}
	return uint32(miblen)
}

const (
	_CPU_CURRENT_PID = -1 // Current process ID.
)

//go:noescape

	if old != nil {
		*old = r
	}
}

func pipe2(flags int32) (r, w int32, errno int32)

//go:noescape
func setitimer(mode int32, new, old *itimerval)

//go:noescape
func sysctl(mib *uint32, miblen uint32, out *byte, size *uintptr, dst *byte, ndst uintptr) int32

// mmap calls the mmap system call. It is implemented in assembly.
// We only pass the lower 32 bits of file offset to the

	MOVD	$SYS_madvise, R8
	SVC
	BCC	ok
	MOVW	$-1, R0
ok:
	MOVW	R0, ret+24(FP)
	RET

// func sysctl(mib *uint32, miblen uint32, out *byte, size *uintptr, dst *byte, ndst uintptr) int32
TEXT runtime·sysctl(SB),NOSPLIT,$0
	MOVD	mib+0(FP), R0
	MOVD	miblen+8(FP), R1
	MOVD	out+16(FP), R2
	MOVD	size+24(FP), R3
	MOVD	dst+32(FP), R4
	MOVD	ndst+40(FP), R5
	MOVD	$SYS___sysctl, R8
	SVC
	BCC	ok

	MOV	$SYS_madvise, T0
	ECALL
	BEQ	T0, ZERO, ok
	MOV	$-1, A0
ok:
	MOVW	A0, ret+24(FP)
	RET

// func sysctl(mib *uint32, miblen uint32, out *byte, size *uintptr, dst *byte, ndst uintptr) int32
TEXT runtime·sysctl(SB),NOSPLIT,$0
	MOV	mib+0(FP), A0
	MOV	miblen+8(FP), A1
	MOV	out+16(FP), A2
	MOV	size+24(FP), A3
	MOV	dst+32(FP), A4
	MOV	ndst+40(FP), A5
	MOV	$SYS___sysctl, T0
	ECALL

	MOVW	n+8(FP), R5		// arg 2 - n
	MOVV	$301, R2		// sys___thrwakeup
	SYSCALL
	MOVW	R2, ret+16(FP)
	RET

TEXT runtime·sysctl(SB),NOSPLIT,$0
	MOVV	mib+0(FP), R4		// arg 1 - mib
	MOVW	miblen+8(FP), R5	// arg 2 - miblen
	MOVV	out+16(FP), R6		// arg 3 - out
	MOVV	size+24(FP), R7		// arg 4 - size
	MOVV	dst+32(FP), R8		// arg 5 - dest
	MOVV	ndst+40(FP), R9		// arg 6 - newlen
	MOVV	$202, R2		// sys___sysctl
	SYSCALL

//go:nosplit
//go:cgo_unsafe_args
func usleep_no_g(usec uint32) {
	asmcgocall_no_g(unsafe.Pointer(abi.FuncPCABI0(usleep_trampoline)), unsafe.Pointer(&usec))
}

//go:nosplit
//go:cgo_unsafe_args
func sysctl(mib *uint32, miblen uint32, out *byte, size *uintptr, dst *byte, ndst uintptr) int32 {
	ret := libcCall(unsafe.Pointer(abi.FuncPCABI0(sysctl_trampoline)), unsafe.Pointer(&mib))
	KeepAlive(mib)
	KeepAlive(out)
	KeepAlive(size)

func sigaction(sig uint32, new, old *sigactiont)

//go:noescape
func sigprocmask(how int32, new, old *sigset)

//go:noescape
func setitimer(mode int32, new, old *itimerval)

//go:noescape
func sysctl(mib *uint32, miblen uint32, out *byte, size *uintptr, dst *byte, ndst uintptr) int32

func raiseproc(sig uint32)

func lwp_gettid() int32
func lwp_kill(pid, tid int32, sig int)

//go:noescape

//go:noescape
func sigaction(sig uint32, new, old *sigactiont)

//go:noescape
func sigaltstack(new, old *stackt)

//go:noescape
func sigprocmask(how int32, new, old *sigset)

//go:noescape
func sysctl(mib *uint32, miblen uint32, out *byte, size *uintptr, dst *byte, ndst uintptr) int32

func lwp_tramp()

func raiseproc(sig uint32)

func lwp_kill(tid int32, sig int)

//go:noescape
func getcontext(ctxt unsafe.Pointer)

	ADDQ	$8, DI			// arg 1 - ptr
	MOVQ	$SYS__lwp_setprivate, AX
	SYSCALL
	JCC	2(PC)
	MOVL	$0xf1, 0xf1		// crash
	RET

TEXT runtime·sysctl(SB),NOSPLIT,$0
	MOVQ	mib+0(FP), DI		// arg 1 - name
	MOVL	miblen+8(FP), SI		// arg 2 - namelen
	MOVQ	out+16(FP), DX		// arg 3 - oldp
	MOVQ	size+24(FP), R10		// arg 4 - oldlenp
	MOVQ	dst+32(FP), R8		// arg 5 - newp
	MOVQ	ndst+40(FP), R9		// arg 6 - newlen
	MOVQ	$SYS___sysctl, AX

	SVC	$SYS___sigaltstack14
	BCS	fail
	RET
fail:
	MOVD	$0, R0
	MOVD	R0, (R0)		// crash

TEXT runtime·sysctl(SB),NOSPLIT,$0
	MOVD	mib+0(FP), R0		// arg 1 - name
	MOVW	miblen+8(FP), R1	// arg 2 - namelen
	MOVD	out+16(FP), R2		// arg 3 - oldp
	MOVD	size+24(FP), R3		// arg 4 - oldlenp
	MOVD	dst+32(FP), R4		// arg 5 - newp
	MOVD	ndst+40(FP), R5		// arg 6 - newlen
	SVC	$SYS___sysctl
	BCC	ok