// _AT_NCPUS from auxv shouldn't be used due to golang.org/issue/15206
		case _AT_PAGESZ:
			physPageSize = val
		case _AT_TIMEKEEP:
			timekeepSharedPage = (*vdsoTimekeep)(unsafe.Pointer(val))
		}

		archauxv(tag, val)
	}
	return i / 2
}

// sysSigaction calls the sigaction system call.
//
//go:nosplit
func sysSigaction(sig uint32, new, old *sigactiont) {

			// worth of random data.
			startupRand = (*[16]byte)(unsafe.Pointer(val))[:]

		case _AT_PAGESZ:
			physPageSize = val

		case _AT_SECURE:
			secureMode = val == 1
		}

		archauxv(tag, val)
		vdsoauxv(tag, val)
	}
	return i / 2
}

var sysTHPSizePath = []byte("/sys/kernel/mm/transparent_hugepage/hpage_pmd_size\x00")

func getHugePageSize() uintptr {
	var numbuf [20]byte