Fields
SYSR1 = 0,
_ERRSTR = 1,
BIND = 2,
CHDIR = 3,
CLOSE = 4,
DUP = 5,
ALARM = 6,
EXEC = 7,
EXITS = 8,
_FSESSION = 9,
FAUTH = 10,
_FSTAT = 11,
SEGBRK = 12,
_MOUNT = 13,
OPEN = 14,
_READ = 15,
OSEEK = 16,
SLEEP = 17,
_STAT = 18,
RFORK = 19,
_WRITE = 20,
PIPE = 21,
CREATE = 22,
FD2PATH = 23,
BRK_ = 24,
REMOVE = 25,
_WSTAT = 26,
_FWSTAT = 27,
NOTIFY = 28,
NOTED = 29,
SEGATTACH = 30,
SEGDETACH = 31,
SEGFREE = 32,
SEGFLUSH = 33,
RENDEZVOUS = 34,
UNMOUNT = 35,
_WAIT = 36,
SEMACQUIRE = 37,
SEMRELEASE = 38,
SEEK = 39,
FVERSION = 40,
ERRSTR = 41,
STAT = 42,
FSTAT = 43,
WSTAT = 44,
FWSTAT = 45,
MOUNT = 46,
AWAIT = 47,
PREAD = 50,
PWRITE = 51,
TSEMACQUIRE = 52,
_NSEC = 53,