ncpu = int32(sysconf(__SC_NPROCESSORS_ONLN))
	physPageSize = sysconf(__SC_PAGE_SIZE)
}

// newosproc0 is a version of newosproc that can be called before the runtime
// is initialized.
//
// This function is not safe to use after initialization as it does not pass an M as fnarg.
//
//go:nosplit
func newosproc0(stacksize uintptr, fn *funcDescriptor) {
	var (
		attr pthread_attr
		oset sigset
		tid  pthread

}

func crash() {
	*(*int32)(nil) = 0
}

func initsig(preinit bool) {
}

// May run with m.p==nil, so write barriers are not allowed.
//
//go:nowritebarrier
func newosproc(mp *m) {
	throw("newosproc: not implemented")
}

//go:linkname os_sigpipe os.sigpipe
func os_sigpipe() {
	throw("too many writes on closed pipe")
}

//go:linkname syscall_now syscall.now

		})
	}
}

// May run with m.p==nil, so write barriers are not allowed.
//
//go:nowritebarrier
func newosproc(mp *m) {
	stk := unsafe.Pointer(mp.g0.stack.hi)
	if false {
		print("newosproc stk=", stk, " m=", mp, " g=", mp.g0, " id=", mp.id, " ostk=", &mp, "\n")
	}

	var uc ucontextt
	getcontext(unsafe.Pointer(&uc))

	exits(&status[0])
}

// May run with m.p==nil, so write barriers are not allowed.
//
//go:nowritebarrier
func newosproc(mp *m) {
	if false {
		print("newosproc mp=", mp, " ostk=", &mp, "\n")
	}
	pid := rfork(_RFPROC | _RFMEM | _RFNOWAIT)
	if pid < 0 {
		throw("newosproc: rfork failed")
	}
	if pid == 0 {
		tstart_plan9(mp)
	}
}

func exitThread(wait *atomic.Uint32) {

		if ret == _EAGAIN {
			println("runtime: may need to increase max user processes (ulimit -u)")
		}
		throw("newosproc")
	}
}

// Version of newosproc that doesn't require a valid G.
//
//go:nosplit
func newosproc0(stacksize uintptr, fn unsafe.Pointer) {
	stack := sysAlloc(stacksize, &memstats.stacks_sys)
	if stack == nil {
		writeErrStr(failallocatestack)
		exit(1)

	if physPageSize == 0 {
		physPageSize = getPageSize()
	}
}

func tstart_sysvicall(newm *m) uint32

// May run with m.p==nil, so write barriers are not allowed.
//
//go:nowritebarrier
func newosproc(mp *m) {
	var (
		attr pthreadattr
		oset sigset
		tid  pthread
		ret  int32
		size uint64
	)

	if pthread_attr_init(&attr) != 0 {
		throw("pthread_attr_init")
	}

//
//go:nowritebarrierrec
//go:nosplit
func newosproc0(mp *m, stk unsafe.Pointer) {
	// TODO: this is completely broken. The args passed to newosproc0 (in asm_amd64.s)
	// are stacksize and function, not *m and stack.
	// Check os_linux.go for an implementation that might actually work.
	throw("bad newosproc0")
}

func exitThread(wait *atomic.Uint32) {

	// behaviour around exec'ing while creating/destroying threads. See
	// issue #19546.
	execLock rwmutex
)

// These errors are reported (via writeErrStr) by some OS-specific
// versions of newosproc and newosproc0.
const (
	failthreadcreate  = "runtime: failed to create new OS thread\n"
	failallocatestack = "runtime: failed to allocate stack for the new OS thread\n"
)

	procWSARecv                            = modws2_32.NewProc("WSARecv")
	procWSARecvFrom                        = modws2_32.NewProc("WSARecvFrom")
	procWSASend                            = modws2_32.NewProc("WSASend")
	procWSASendTo                          = modws2_32.NewProc("WSASendTo")
	procWSAStartup                         = modws2_32.NewProc("WSAStartup")
	procbind                               = modws2_32.NewProc("bind")

	procOpenThreadToken                   = modadvapi32.NewProc("OpenThreadToken")
	procQueryServiceStatus                = modadvapi32.NewProc("QueryServiceStatus")
	procRevertToSelf                      = modadvapi32.NewProc("RevertToSelf")
	procSetTokenInformation               = modadvapi32.NewProc("SetTokenInformation")
	procProcessPrng                       = modbcryptprimitives.NewProc("ProcessPrng")