forked from u-root/u-root
/
abi_linux.go
804 lines (741 loc) · 17.1 KB
/
abi_linux.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
// Copyright 2018 Google LLC.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package abi
import (
"encoding/binary"
"syscall"
"golang.org/x/sys/unix"
)
// From <linux/futex.h> and <sys/time.h>.
// Flags are used in syscall futex(2).
const (
FUTEX_WAIT = 0
FUTEX_WAKE = 1
FUTEX_FD = 2
FUTEX_REQUEUE = 3
FUTEX_CMP_REQUEUE = 4
FUTEX_WAKE_OP = 5
FUTEX_LOCK_PI = 6
FUTEX_UNLOCK_PI = 7
FUTEX_TRYLOCK_PI = 8
FUTEX_WAIT_BITSET = 9
FUTEX_WAKE_BITSET = 10
FUTEX_WAIT_REQUEUE_PI = 11
FUTEX_CMP_REQUEUE_PI = 12
FUTEX_PRIVATE_FLAG = 128
FUTEX_CLOCK_REALTIME = 256
)
// These are flags are from <linux/futex.h> and are used in FUTEX_WAKE_OP
// to define the operations.
const (
FUTEX_OP_SET = 0
FUTEX_OP_ADD = 1
FUTEX_OP_OR = 2
FUTEX_OP_ANDN = 3
FUTEX_OP_XOR = 4
FUTEX_OP_OPARG_SHIFT = 8
FUTEX_OP_CMP_EQ = 0
FUTEX_OP_CMP_NE = 1
FUTEX_OP_CMP_LT = 2
FUTEX_OP_CMP_LE = 3
FUTEX_OP_CMP_GT = 4
FUTEX_OP_CMP_GE = 5
)
// FUTEX_TID_MASK is the TID portion of a PI futex word.
const FUTEX_TID_MASK = 0x3fffffff
// ptrace commands from include/uapi/linux/ptrace.h.
const (
PTRACE_TRACEME = 0
PTRACE_PEEKTEXT = 1
PTRACE_PEEKDATA = 2
PTRACE_PEEKUSR = 3
PTRACE_POKETEXT = 4
PTRACE_POKEDATA = 5
PTRACE_POKEUSR = 6
PTRACE_CONT = 7
PTRACE_KILL = 8
PTRACE_SINGLESTEP = 9
PTRACE_ATTACH = 16
PTRACE_DETACH = 17
PTRACE_SYSCALL = 24
PTRACE_SETOPTIONS = 0x4200
PTRACE_GETEVENTMSG = 0x4201
PTRACE_GETSIGINFO = 0x4202
PTRACE_SETSIGINFO = 0x4203
PTRACE_GETREGSET = 0x4204
PTRACE_SETREGSET = 0x4205
PTRACE_SEIZE = 0x4206
PTRACE_INTERRUPT = 0x4207
PTRACE_LISTEN = 0x4208
PTRACE_PEEKSIGINFO = 0x4209
PTRACE_GETSIGMASK = 0x420a
PTRACE_SETSIGMASK = 0x420b
PTRACE_SECCOMP_GET_FILTER = 0x420c
PTRACE_SECCOMP_GET_METADATA = 0x420d
)
// ptrace commands from arch/x86/include/uapi/asm/ptrace-abi.h.
const (
PTRACE_GETREGS = 12
PTRACE_SETREGS = 13
PTRACE_GETFPREGS = 14
PTRACE_SETFPREGS = 15
PTRACE_GETFPXREGS = 18
PTRACE_SETFPXREGS = 19
PTRACE_OLDSETOPTIONS = 21
PTRACE_GET_THREAD_AREA = 25
PTRACE_SET_THREAD_AREA = 26
PTRACE_ARCH_PRCTL = 30
PTRACE_SYSEMU = 31
PTRACE_SYSEMU_SINGLESTEP = 32
PTRACE_SINGLEBLOCK = 33
)
// ptrace event codes from include/uapi/linux/ptrace.h.
const (
PTRACE_EVENT_FORK = 1
PTRACE_EVENT_VFORK = 2
PTRACE_EVENT_CLONE = 3
PTRACE_EVENT_EXEC = 4
PTRACE_EVENT_VFORK_DONE = 5
PTRACE_EVENT_EXIT = 6
PTRACE_EVENT_SECCOMP = 7
PTRACE_EVENT_STOP = 128
)
// PTRACE_SETOPTIONS options from include/uapi/linux/ptrace.h.
const (
PTRACE_O_TRACESYSGOOD = 1
PTRACE_O_TRACEFORK = 1 << PTRACE_EVENT_FORK
PTRACE_O_TRACEVFORK = 1 << PTRACE_EVENT_VFORK
PTRACE_O_TRACECLONE = 1 << PTRACE_EVENT_CLONE
PTRACE_O_TRACEEXEC = 1 << PTRACE_EVENT_EXEC
PTRACE_O_TRACEVFORKDONE = 1 << PTRACE_EVENT_VFORK_DONE
PTRACE_O_TRACEEXIT = 1 << PTRACE_EVENT_EXIT
PTRACE_O_TRACESECCOMP = 1 << PTRACE_EVENT_SECCOMP
PTRACE_O_EXITKILL = 1 << 20
PTRACE_O_SUSPEND_SECCOMP = 1 << 21
)
// from gvisor time.go
// Flags for clock_nanosleep(2).
const (
TIMER_ABSTIME = 1
)
// Flags for timerfd syscalls (timerfd_create(2), timerfd_settime(2)).
const (
// TFD_CLOEXEC is a timerfd_create flag.
TFD_CLOEXEC = unix.O_CLOEXEC
// TFD_NONBLOCK is a timerfd_create flag.
TFD_NONBLOCK = unix.O_NONBLOCK
// TFD_TIMER_ABSTIME is a timerfd_settime flag.
TFD_TIMER_ABSTIME = 1
)
// TimeT represents time_t in <time.h>. It represents time in seconds.
type TimeT int64
// SizeOfTimeval is the size of a Timeval struct in bytes.
const SizeOfTimeval = 16
// ClockT represents type clock_t.
type ClockT int64
// Tms represents struct tms, used by times(2).
type Tms struct {
UTime ClockT
STime ClockT
CUTime ClockT
CSTime ClockT
}
// TimerID represents type timer_t, which identifies a POSIX per-process
// interval timer.
type TimerID int32
// ptrace
// PtraceRequestSet are the possible ptrace(2) requests.
var PtraceRequestSet = FlagSet{
&Value{
Value: PTRACE_TRACEME,
Name: "PTRACE_TRACEME",
},
&Value{
Value: PTRACE_PEEKTEXT,
Name: "PTRACE_PEEKTEXT",
},
&Value{
Value: PTRACE_PEEKDATA,
Name: "PTRACE_PEEKDATA",
},
&Value{
Value: PTRACE_PEEKUSR,
Name: "PTRACE_PEEKUSR",
},
&Value{
Value: PTRACE_POKETEXT,
Name: "PTRACE_POKETEXT",
},
&Value{
Value: PTRACE_POKEDATA,
Name: "PTRACE_POKEDATA",
},
&Value{
Value: PTRACE_POKEUSR,
Name: "PTRACE_POKEUSR",
},
&Value{
Value: PTRACE_CONT,
Name: "PTRACE_CONT",
},
&Value{
Value: PTRACE_KILL,
Name: "PTRACE_KILL",
},
&Value{
Value: PTRACE_SINGLESTEP,
Name: "PTRACE_SINGLESTEP",
},
&Value{
Value: PTRACE_ATTACH,
Name: "PTRACE_ATTACH",
},
&Value{
Value: PTRACE_DETACH,
Name: "PTRACE_DETACH",
},
&Value{
Value: PTRACE_SYSCALL,
Name: "PTRACE_SYSCALL",
},
&Value{
Value: PTRACE_SETOPTIONS,
Name: "PTRACE_SETOPTIONS",
},
&Value{
Value: PTRACE_GETEVENTMSG,
Name: "PTRACE_GETEVENTMSG",
},
&Value{
Value: PTRACE_GETSIGINFO,
Name: "PTRACE_GETSIGINFO",
},
&Value{
Value: PTRACE_SETSIGINFO,
Name: "PTRACE_SETSIGINFO",
},
&Value{
Value: PTRACE_GETREGSET,
Name: "PTRACE_GETREGSET",
},
&Value{
Value: PTRACE_SETREGSET,
Name: "PTRACE_SETREGSET",
},
&Value{
Value: PTRACE_SEIZE,
Name: "PTRACE_SEIZE",
},
&Value{
Value: PTRACE_INTERRUPT,
Name: "PTRACE_INTERRUPT",
},
&Value{
Value: PTRACE_LISTEN,
Name: "PTRACE_LISTEN",
},
&Value{
Value: PTRACE_PEEKSIGINFO,
Name: "PTRACE_PEEKSIGINFO",
},
&Value{
Value: PTRACE_GETSIGMASK,
Name: "PTRACE_GETSIGMASK",
},
&Value{
Value: PTRACE_SETSIGMASK,
Name: "PTRACE_SETSIGMASK",
},
&Value{
Value: PTRACE_GETREGS,
Name: "PTRACE_GETREGS",
},
&Value{
Value: PTRACE_SETREGS,
Name: "PTRACE_SETREGS",
},
&Value{
Value: PTRACE_GETFPREGS,
Name: "PTRACE_GETFPREGS",
},
&Value{
Value: PTRACE_SETFPREGS,
Name: "PTRACE_SETFPREGS",
},
&Value{
Value: PTRACE_GETFPXREGS,
Name: "PTRACE_GETFPXREGS",
},
&Value{
Value: PTRACE_SETFPXREGS,
Name: "PTRACE_SETFPXREGS",
},
&Value{
Value: PTRACE_OLDSETOPTIONS,
Name: "PTRACE_OLDSETOPTIONS",
},
&Value{
Value: PTRACE_GET_THREAD_AREA,
Name: "PTRACE_GET_THREAD_AREA",
},
&Value{
Value: PTRACE_SET_THREAD_AREA,
Name: "PTRACE_SET_THREAD_AREA",
},
&Value{
Value: PTRACE_ARCH_PRCTL,
Name: "PTRACE_ARCH_PRCTL",
},
&Value{
Value: PTRACE_SYSEMU,
Name: "PTRACE_SYSEMU",
},
&Value{
Value: PTRACE_SYSEMU_SINGLESTEP,
Name: "PTRACE_SYSEMU_SINGLESTEP",
},
&Value{
Value: PTRACE_SINGLEBLOCK,
Name: "PTRACE_SINGLEBLOCK",
},
}
// clone
// CloneFlagSet is the set of clone(2) flags.
var CloneFlagSet = FlagSet{
&BitFlag{
Value: syscall.CLONE_VM,
Name: "CLONE_VM",
},
&BitFlag{
Value: syscall.CLONE_FS,
Name: "CLONE_FS",
},
&BitFlag{
Value: syscall.CLONE_FILES,
Name: "CLONE_FILES",
},
&BitFlag{
Value: syscall.CLONE_SIGHAND,
Name: "CLONE_SIGHAND",
},
&BitFlag{
Value: syscall.CLONE_PTRACE,
Name: "CLONE_PTRACE",
},
&BitFlag{
Value: syscall.CLONE_VFORK,
Name: "CLONE_VFORK",
},
&BitFlag{
Value: syscall.CLONE_PARENT,
Name: "CLONE_PARENT",
},
&BitFlag{
Value: syscall.CLONE_THREAD,
Name: "CLONE_THREAD",
},
&BitFlag{
Value: syscall.CLONE_NEWNS,
Name: "CLONE_NEWNS",
},
&BitFlag{
Value: syscall.CLONE_SYSVSEM,
Name: "CLONE_SYSVSEM",
},
&BitFlag{
Value: syscall.CLONE_SETTLS,
Name: "CLONE_SETTLS",
},
&BitFlag{
Value: syscall.CLONE_PARENT_SETTID,
Name: "CLONE_PARENT_SETTID",
},
&BitFlag{
Value: syscall.CLONE_CHILD_CLEARTID,
Name: "CLONE_CHILD_CLEARTID",
},
&BitFlag{
Value: syscall.CLONE_DETACHED,
Name: "CLONE_DETACHED",
},
&BitFlag{
Value: syscall.CLONE_UNTRACED,
Name: "CLONE_UNTRACED",
},
&BitFlag{
Value: syscall.CLONE_CHILD_SETTID,
Name: "CLONE_CHILD_SETTID",
},
&BitFlag{
Value: syscall.CLONE_NEWUTS,
Name: "CLONE_NEWUTS",
},
&BitFlag{
Value: syscall.CLONE_NEWIPC,
Name: "CLONE_NEWIPC",
},
&BitFlag{
Value: syscall.CLONE_NEWUSER,
Name: "CLONE_NEWUSER",
},
&BitFlag{
Value: syscall.CLONE_NEWPID,
Name: "CLONE_NEWPID",
},
&BitFlag{
Value: syscall.CLONE_NEWNET,
Name: "CLONE_NEWNET",
},
&BitFlag{
Value: syscall.CLONE_IO,
Name: "CLONE_IO",
},
}
// Socket defines. Some of these might move to abi_unix.go
// Address families, from linux/socket.h.
const (
AF_UNSPEC = 0
AF_UNIX = 1
AF_INET = 2
AF_AX25 = 3
AF_IPX = 4
AF_APPLETALK = 5
AF_NETROM = 6
AF_BRIDGE = 7
AF_ATMPVC = 8
AF_X25 = 9
AF_INET6 = 10
AF_ROSE = 11
AF_DECnet = 12
AF_NETBEUI = 13
AF_SECURITY = 14
AF_KEY = 15
AF_NETLINK = 16
AF_PACKET = 17
AF_ASH = 18
AF_ECONET = 19
AF_ATMSVC = 20
AF_RDS = 21
AF_SNA = 22
AF_IRDA = 23
AF_PPPOX = 24
AF_WANPIPE = 25
AF_LLC = 26
AF_IB = 27
AF_MPLS = 28
AF_CAN = 29
AF_TIPC = 30
AF_BLUETOOTH = 31
AF_IUCV = 32
AF_RXRPC = 33
AF_ISDN = 34
AF_PHONET = 35
AF_IEEE802154 = 36
AF_CAIF = 37
AF_ALG = 38
AF_NFC = 39
AF_VSOCK = 40
)
// sendmsg(2)/recvmsg(2) flags, from linux/socket.h.
const (
MSG_OOB = 0x1
MSG_PEEK = 0x2
MSG_DONTROUTE = 0x4
MSG_TRYHARD = 0x4
MSG_CTRUNC = 0x8
MSG_PROBE = 0x10
MSG_TRUNC = 0x20
MSG_DONTWAIT = 0x40
MSG_EOR = 0x80
MSG_WAITALL = 0x100
MSG_FIN = 0x200
MSG_EOF = MSG_FIN
MSG_SYN = 0x400
MSG_CONFIRM = 0x800
MSG_RST = 0x1000
MSG_ERRQUEUE = 0x2000
MSG_NOSIGNAL = 0x4000
MSG_MORE = 0x8000
MSG_WAITFORONE = 0x10000
MSG_SENDPAGE_NOTLAST = 0x20000
MSG_REINJECT = 0x8000000
MSG_ZEROCOPY = 0x4000000
MSG_FASTOPEN = 0x20000000
MSG_CMSG_CLOEXEC = 0x40000000
)
// SOL_SOCKET is from socket.h
const SOL_SOCKET = 1
// Socket types, from linux/net.h.
const (
SOCK_STREAM = 1
SOCK_DGRAM = 2
SOCK_RAW = 3
SOCK_RDM = 4
SOCK_SEQPACKET = 5
SOCK_DCCP = 6
SOCK_PACKET = 10
)
// SOCK_TYPE_MASK covers all of the above socket types. The remaining bits are
// flags. From linux/net.h.
const SOCK_TYPE_MASK = 0xf
// socket(2)/socketpair(2)/accept4(2) flags, from linux/net.h.
const (
SOCK_CLOEXEC = unix.O_CLOEXEC
SOCK_NONBLOCK = unix.O_NONBLOCK
)
// shutdown(2) how commands, from <linux/net.h>.
const (
SHUT_RD = 0
SHUT_WR = 1
SHUT_RDWR = 2
)
// Socket options from socket.h.
const (
SO_ERROR = 4
SO_KEEPALIVE = 9
SO_LINGER = 13
SO_MARK = 36
SO_PASSCRED = 16
SO_PEERCRED = 17
SO_PEERNAME = 28
SO_PROTOCOL = 38
SO_RCVBUF = 8
SO_RCVTIMEO = 20
SO_REUSEADDR = 2
SO_SNDBUF = 7
SO_SNDTIMEO = 21
SO_TIMESTAMP = 29
SO_TIMESTAMPNS = 35
SO_TYPE = 3
)
// SockAddrMax is the maximum size of a struct sockaddr, from
// uapi/linux/socket.h.
const SockAddrMax = 128
// SockAddrInt is struct sockaddr_in, from uapi/linux/in.h.
type SockAddrInet struct {
Family uint16
Port uint16
Addr [4]byte
Zero [8]uint8 // pad to sizeof(struct sockaddr).
}
// SockAddrInt6 is struct sockaddr_in6, from uapi/linux/in6.h.
type SockAddrInet6 struct {
Family uint16
Port uint16
Flowinfo uint32
Addr [16]byte
Scope_id uint32
}
// UnixPathMax is the maximum length of the path in an AF_UNIX socket.
//
// From uapi/linux/un.h.
const UnixPathMax = 108
// SockAddrUnix is struct sockaddr_un, from uapi/linux/un.h.
type SockAddrUnix struct {
Family uint16
Path [UnixPathMax]int8
}
// TCPInfo is a collection of TCP statistics.
//
// From uapi/linux/tcp.h.
type TCPInfo struct {
State uint8
CaState uint8
Retransmits uint8
Probes uint8
Backoff uint8
Options uint8
// WindowScale is the combination of snd_wscale (first 4 bits) and rcv_wscale (second 4 bits)
WindowScale uint8
// DeliveryRateAppLimited is a boolean and only the first bit is meaningful.
DeliveryRateAppLimited uint8
RTO uint32
ATO uint32
SndMss uint32
RcvMss uint32
Unacked uint32
Sacked uint32
Lost uint32
Retrans uint32
Fackets uint32
// Times.
LastDataSent uint32
LastAckSent uint32
LastDataRecv uint32
LastAckRecv uint32
// Metrics.
PMTU uint32
RcvSsthresh uint32
RTT uint32
RTTVar uint32
SndSsthresh uint32
SndCwnd uint32
Advmss uint32
Reordering uint32
RcvRTT uint32
RcvSpace uint32
TotalRetrans uint32
PacingRate uint64
MaxPacingRate uint64
// BytesAcked is RFC4898 tcpEStatsAppHCThruOctetsAcked.
BytesAcked uint64
// BytesReceived is RFC4898 tcpEStatsAppHCThruOctetsReceived.
BytesReceived uint64
// SegsOut is RFC4898 tcpEStatsPerfSegsOut.
SegsOut uint32
// SegsIn is RFC4898 tcpEStatsPerfSegsIn.
SegsIn uint32
NotSentBytes uint32
MinRTT uint32
// DataSegsIn is RFC4898 tcpEStatsDataSegsIn.
DataSegsIn uint32
// DataSegsOut is RFC4898 tcpEStatsDataSegsOut.
DataSegsOut uint32
DeliveryRate uint64
// BusyTime is the time in microseconds busy sending data.
BusyTime uint64
// RwndLimited is the time in microseconds limited by receive window.
RwndLimited uint64
// SndBufLimited is the time in microseconds limited by send buffer.
SndBufLimited uint64
}
// SizeOfTCPInfo is the binary size of a TCPInfo struct (104 bytes).
var SizeOfTCPInfo = binary.Size(TCPInfo{})
// Control message types, from linux/socket.h.
const (
SCM_CREDENTIALS = 0x2
SCM_RIGHTS = 0x1
)
// A ControlMessageHeader is the header for a socket control message.
//
// ControlMessageHeader represents struct cmsghdr from linux/socket.h.
type ControlMessageHeader struct {
Length uint64
Level int32
Type int32
}
// SizeOfControlMessageHeader is the binary size of a ControlMessageHeader
// struct.
var SizeOfControlMessageHeader = int(binary.Size(ControlMessageHeader{}))
// A ControlMessageCredentials is an SCM_CREDENTIALS socket control message.
//
// ControlMessageCredentials represents struct ucred from linux/socket.h.
type ControlMessageCredentials struct {
PID int32
UID uint32
GID uint32
}
// SizeOfControlMessageCredentials is the binary size of a
// ControlMessageCredentials struct.
var SizeOfControlMessageCredentials = int(binary.Size(ControlMessageCredentials{}))
// A ControlMessageRights is an SCM_RIGHTS socket control message.
type ControlMessageRights []int32
// SizeOfControlMessageRight is the size of a single element in
// ControlMessageRights.
const SizeOfControlMessageRight = 4
// SCM_MAX_FD is the maximum number of FDs accepted in a single sendmsg call.
// From net/scm.h.
const SCM_MAX_FD = 253
// itimer
// itimer types for getitimer(2) and setitimer(2), from
// include/uapi/linux/time.h.
const (
ITIMER_REAL = 0
ITIMER_VIRTUAL = 1
ITIMER_PROF = 2
)
// ItimerTypes are the possible itimer types.
var ItimerTypes = FlagSet{
&Value{
Value: ITIMER_REAL,
Name: "ITIMER_REAL",
},
&Value{
Value: ITIMER_VIRTUAL,
Name: "ITIMER_VIRTUAL",
},
&Value{
Value: ITIMER_PROF,
Name: "ITIMER_PROF",
},
}
// from gvisor futex.go
// FutexCmd are the possible futex(2) commands.
var FutexCmd = FlagSet{
&Value{
Value: FUTEX_WAIT,
Name: "FUTEX_WAIT",
},
&Value{
Value: FUTEX_WAKE,
Name: "FUTEX_WAKE",
},
&Value{
Value: FUTEX_FD,
Name: "FUTEX_FD",
},
&Value{
Value: FUTEX_REQUEUE,
Name: "FUTEX_REQUEUE",
},
&Value{
Value: FUTEX_CMP_REQUEUE,
Name: "FUTEX_CMP_REQUEUE",
},
&Value{
Value: FUTEX_WAKE_OP,
Name: "FUTEX_WAKE_OP",
},
&Value{
Value: FUTEX_LOCK_PI,
Name: "FUTEX_LOCK_PI",
},
&Value{
Value: FUTEX_UNLOCK_PI,
Name: "FUTEX_UNLOCK_PI",
},
&Value{
Value: FUTEX_TRYLOCK_PI,
Name: "FUTEX_TRYLOCK_PI",
},
&Value{
Value: FUTEX_WAIT_BITSET,
Name: "FUTEX_WAIT_BITSET",
},
&Value{
Value: FUTEX_WAKE_BITSET,
Name: "FUTEX_WAKE_BITSET",
},
&Value{
Value: FUTEX_WAIT_REQUEUE_PI,
Name: "FUTEX_WAIT_REQUEUE_PI",
},
&Value{
Value: FUTEX_CMP_REQUEUE_PI,
Name: "FUTEX_CMP_REQUEUE_PI",
},
}
func Futex(op uint64) string {
cmd := op &^ (FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME)
clockRealtime := (op & FUTEX_CLOCK_REALTIME) == FUTEX_CLOCK_REALTIME
private := (op & FUTEX_PRIVATE_FLAG) == FUTEX_PRIVATE_FLAG
s := FutexCmd.Parse(cmd)
if clockRealtime {
s += "|FUTEX_CLOCK_REALTIME"
}
if private {
s += "|FUTEX_PRIVATE_FLAG"
}
return s
}