// directly schedule the waiter. The context switch is unavoidable in
// the signal case.
//
//go:systemstack
func suspendG(gp *g) suspendGState {
	if mp := getg().m; mp.curg != nil && readgstatus(mp.curg) == _Grunning {
		// Since we're on the system stack of this M, the user
		// G is stuck at an unsafe point. If another goroutine
		// were to try to preempt m.curg, it could deadlock.

	if raceenabled {
		// g0 doesn't have a race context. Borrow the user G's.
		if getg().racectx != 0 {
			throw("expected racectx == 0")
		}
		getg().racectx = getg().m.curg.racectx
		// (This defer should get open-coded, which is safe on
		// the system stack.)
		defer func() { getg().racectx = 0 }()
	}

	// This function must not allocate while holding trace.lock:

	// calls back into Go.
	c := &getg().m.winsyscall
	c.fn = fn
	c.n = uintptr(len(args))
	if c.n != 0 {
		c.args = uintptr(noescape(unsafe.Pointer(&args[0])))
	}
	cgocall(asmstdcallAddr, unsafe.Pointer(c))
	// cgocall may reschedule us on to a different M,
	// but it copies the return values into the new M's
	// so we can read them from there.
	c = &getg().m.winsyscall
	return c.r1, c.r2, c.err

	}
	if t.NumResults() == 1 {
		n.SetType(l.Type().Result(0).Type)

		if n.Op() == ir.OCALLFUNC && n.Fun.Op() == ir.ONAME {
			if sym := n.Fun.(*ir.Name).Sym(); types.RuntimeSymName(sym) == "getg" {
				// Emit code for runtime.getg() directly instead of calling function.
				// Most such rewrites (for example the similar one for math.Sqrt) should be done in walk,

	}
	if !cgoIsGoPointer(src) {
		return
	}
	if cgoIsGoPointer(unsafe.Pointer(dst)) {
		return
	}

	// If we are running on the system stack then dst might be an
	// address on the stack, which is OK.
	gp := getg()
	if gp == gp.m.g0 || gp == gp.m.gsignal {
		return
	}

	// Allocating memory can write to various mfixalloc structs
	// that look like they are non-Go memory.
	if gp.m.mallocing != 0 {
		return
	}

				} else if size&1 == 0 {
					align = 2
				} else {
					align = 1
				}
			}
			return persistentalloc(size, align, &memstats.other_sys)
		}

		if inittrace.active && inittrace.id == getg().goid {
			// Init functions are executed sequentially in a single goroutine.
			inittrace.allocs += 1
		}
	}

	// assistG is the G to charge for this allocation, or nil if

		// another stack. Either way, no need for barriers.
		// This will also catch if dst is in a freed span,
		// though that should never have.
		return
	}
	buf := &getg().m.p.ptr().wbBuf

	// Double-check that the bitmaps generated in the two possible paths match.
	const doubleCheck = false
	if doubleCheck {
		doubleCheckTypePointersOfType(s, typ, dst, size)
	}

	// buffer flushes are rare. Record the lock edge even if it doesn't happen
	// this time.
	lockRankMayTraceFlush()

	// Check if we're already locked. If so, return an invalid traceLocker.
	if getg().m.trace.seqlock.Load()%2 == 1 {
		return traceLocker{}
	}
	return traceAcquireEnabled()
}

// ok returns true if the traceLocker is valid (i.e. tracing is enabled).
//

// writeErrData is the common parts of writeErr{,Str}.
//
//go:nosplit
func writeErrData(data *byte, n int32) {
	write(2, unsafe.Pointer(data), n)

	// If crashing, print a copy to the SetCrashOutput fd.
	gp := getg()
	if gp != nil && gp.m.dying > 0 ||
		gp == nil && panicking.Load() > 0 {
		if fd := crashFD.Load(); fd != ^uintptr(0) {
			write(fd, unsafe.Pointer(data), n)
		}
	}
}

	libc_port_associate,
	libc_port_dissociate,
	libc_port_getn,
	libc_port_alert libcFunc
	netpollWakeSig atomic.Uint32 // used to avoid duplicate calls of netpollBreak
)

func errno() int32 {
	return *getg().m.perrno
}

func port_create() int32 {
	return int32(sysvicall0(&libc_port_create))
}

func port_associate(port, source int32, object uintptr, events uint32, user uintptr) int32 {