summaryrefslogtreecommitdiff
path: root/gdb/amd64-linux-tdep.c
blob: e262c199e7d002f19dc53c77a32308a06efffe07 (plain)
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
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
/* Target-dependent code for GNU/Linux x86-64.

   Copyright (C) 2001-2013 Free Software Foundation, Inc.
   Contributed by Jiri Smid, SuSE Labs.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"
#include "arch-utils.h"
#include "frame.h"
#include "gdbcore.h"
#include "regcache.h"
#include "osabi.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "reggroups.h"
#include "regset.h"
#include "amd64-linux-tdep.h"
#include "i386-linux-tdep.h"
#include "linux-tdep.h"
#include "i386-xstate.h"

#include "gdb_string.h"

#include "amd64-tdep.h"
#include "solib-svr4.h"
#include "xml-syscall.h"
#include "glibc-tdep.h"

#include "features/i386/amd64-linux.c"
#include "features/i386/amd64-avx-linux.c"
#include "features/i386/x32-linux.c"
#include "features/i386/x32-avx-linux.c"

/* The syscall's XML filename for i386.  */
#define XML_SYSCALL_FILENAME_AMD64 "syscalls/amd64-linux.xml"

#include "record.h"
#include "linux-record.h"

/* Supported register note sections.  */
static struct core_regset_section amd64_linux_regset_sections[] =
{
  { ".reg", 27 * 8, "general-purpose" },
  { ".reg2", 512, "floating-point" },
  { ".reg-xstate", I386_XSTATE_MAX_SIZE, "XSAVE extended state" },
  { NULL, 0 }
};

/* Mapping between the general-purpose registers in `struct user'
   format and GDB's register cache layout.  */

/* From <sys/reg.h>.  */
int amd64_linux_gregset_reg_offset[] =
{
  10 * 8,			/* %rax */
  5 * 8,			/* %rbx */
  11 * 8,			/* %rcx */
  12 * 8,			/* %rdx */
  13 * 8,			/* %rsi */
  14 * 8,			/* %rdi */
  4 * 8,			/* %rbp */
  19 * 8,			/* %rsp */
  9 * 8,			/* %r8 ...  */
  8 * 8,
  7 * 8,
  6 * 8,
  3 * 8,
  2 * 8,
  1 * 8,
  0 * 8,			/* ... %r15 */
  16 * 8,			/* %rip */
  18 * 8,			/* %eflags */
  17 * 8,			/* %cs */
  20 * 8,			/* %ss */
  23 * 8,			/* %ds */
  24 * 8,			/* %es */
  25 * 8,			/* %fs */
  26 * 8,			/* %gs */
  -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1,
  15 * 8			/* "orig_rax" */
};


/* Support for signal handlers.  */

#define LINUX_SIGTRAMP_INSN0	0x48	/* mov $NNNNNNNN, %rax */
#define LINUX_SIGTRAMP_OFFSET0	0
#define LINUX_SIGTRAMP_INSN1	0x0f	/* syscall */
#define LINUX_SIGTRAMP_OFFSET1	7

static const gdb_byte amd64_linux_sigtramp_code[] =
{
  /* mov $__NR_rt_sigreturn, %rax */
  LINUX_SIGTRAMP_INSN0, 0xc7, 0xc0, 0x0f, 0x00, 0x00, 0x00,
  /* syscall */
  LINUX_SIGTRAMP_INSN1, 0x05
};

static const gdb_byte amd64_x32_linux_sigtramp_code[] =
{
  /* mov $__NR_rt_sigreturn, %rax.  */
  LINUX_SIGTRAMP_INSN0, 0xc7, 0xc0, 0x01, 0x02, 0x00, 0x40,
  /* syscall */
  LINUX_SIGTRAMP_INSN1, 0x05
};

#define LINUX_SIGTRAMP_LEN (sizeof amd64_linux_sigtramp_code)

/* If PC is in a sigtramp routine, return the address of the start of
   the routine.  Otherwise, return 0.  */

static CORE_ADDR
amd64_linux_sigtramp_start (struct frame_info *this_frame)
{
  struct gdbarch *gdbarch;
  const gdb_byte *sigtramp_code;
  CORE_ADDR pc = get_frame_pc (this_frame);
  gdb_byte buf[LINUX_SIGTRAMP_LEN];

  /* We only recognize a signal trampoline if PC is at the start of
     one of the two instructions.  We optimize for finding the PC at
     the start, as will be the case when the trampoline is not the
     first frame on the stack.  We assume that in the case where the
     PC is not at the start of the instruction sequence, there will be
     a few trailing readable bytes on the stack.  */

  if (!safe_frame_unwind_memory (this_frame, pc, buf, sizeof buf))
    return 0;

  if (buf[0] != LINUX_SIGTRAMP_INSN0)
    {
      if (buf[0] != LINUX_SIGTRAMP_INSN1)
	return 0;

      pc -= LINUX_SIGTRAMP_OFFSET1;
      if (!safe_frame_unwind_memory (this_frame, pc, buf, sizeof buf))
	return 0;
    }

  gdbarch = get_frame_arch (this_frame);
  if (gdbarch_ptr_bit (gdbarch) == 32)
    sigtramp_code = amd64_x32_linux_sigtramp_code;
  else
    sigtramp_code = amd64_linux_sigtramp_code;
  if (memcmp (buf, sigtramp_code, LINUX_SIGTRAMP_LEN) != 0)
    return 0;

  return pc;
}

/* Return whether THIS_FRAME corresponds to a GNU/Linux sigtramp
   routine.  */

static int
amd64_linux_sigtramp_p (struct frame_info *this_frame)
{
  CORE_ADDR pc = get_frame_pc (this_frame);
  const char *name;

  find_pc_partial_function (pc, &name, NULL, NULL);

  /* If we have NAME, we can optimize the search.  The trampoline is
     named __restore_rt.  However, it isn't dynamically exported from
     the shared C library, so the trampoline may appear to be part of
     the preceding function.  This should always be sigaction,
     __sigaction, or __libc_sigaction (all aliases to the same
     function).  */
  if (name == NULL || strstr (name, "sigaction") != NULL)
    return (amd64_linux_sigtramp_start (this_frame) != 0);

  return (strcmp ("__restore_rt", name) == 0);
}

/* Offset to struct sigcontext in ucontext, from <asm/ucontext.h>.  */
#define AMD64_LINUX_UCONTEXT_SIGCONTEXT_OFFSET 40

/* Assuming THIS_FRAME is a GNU/Linux sigtramp routine, return the
   address of the associated sigcontext structure.  */

static CORE_ADDR
amd64_linux_sigcontext_addr (struct frame_info *this_frame)
{
  struct gdbarch *gdbarch = get_frame_arch (this_frame);
  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
  CORE_ADDR sp;
  gdb_byte buf[8];

  get_frame_register (this_frame, AMD64_RSP_REGNUM, buf);
  sp = extract_unsigned_integer (buf, 8, byte_order);

  /* The sigcontext structure is part of the user context.  A pointer
     to the user context is passed as the third argument to the signal
     handler, i.e. in %rdx.  Unfortunately %rdx isn't preserved across
     function calls so we can't use it.  Fortunately the user context
     is part of the signal frame and the unwound %rsp directly points
     at it.  */
  return sp + AMD64_LINUX_UCONTEXT_SIGCONTEXT_OFFSET;
}


static LONGEST
amd64_linux_get_syscall_number (struct gdbarch *gdbarch,
                                ptid_t ptid)
{
  struct regcache *regcache = get_thread_regcache (ptid);
  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
  /* The content of a register.  */
  gdb_byte buf[8];
  /* The result.  */
  LONGEST ret;

  /* Getting the system call number from the register.
     When dealing with x86_64 architecture, this information
     is stored at %rax register.  */
  regcache_cooked_read (regcache, AMD64_LINUX_ORIG_RAX_REGNUM, buf);

  ret = extract_signed_integer (buf, 8, byte_order);

  return ret;
}


/* From <asm/sigcontext.h>.  */
static int amd64_linux_sc_reg_offset[] =
{
  13 * 8,			/* %rax */
  11 * 8,			/* %rbx */
  14 * 8,			/* %rcx */
  12 * 8,			/* %rdx */
  9 * 8,			/* %rsi */
  8 * 8,			/* %rdi */
  10 * 8,			/* %rbp */
  15 * 8,			/* %rsp */
  0 * 8,			/* %r8 */
  1 * 8,			/* %r9 */
  2 * 8,			/* %r10 */
  3 * 8,			/* %r11 */
  4 * 8,			/* %r12 */
  5 * 8,			/* %r13 */
  6 * 8,			/* %r14 */
  7 * 8,			/* %r15 */
  16 * 8,			/* %rip */
  17 * 8,			/* %eflags */

  /* FIXME: kettenis/2002030531: The registers %cs, %fs and %gs are
     available in `struct sigcontext'.  However, they only occupy two
     bytes instead of four, which makes using them here rather
     difficult.  Leave them out for now.  */
  -1,				/* %cs */
  -1,				/* %ss */
  -1,				/* %ds */
  -1,				/* %es */
  -1,				/* %fs */
  -1				/* %gs */
};

static int
amd64_linux_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
				 struct reggroup *group)
{ 
  if (regnum == AMD64_LINUX_ORIG_RAX_REGNUM)
    return (group == system_reggroup
            || group == save_reggroup
            || group == restore_reggroup);
  return i386_register_reggroup_p (gdbarch, regnum, group);
}

/* Set the program counter for process PTID to PC.  */

static void
amd64_linux_write_pc (struct regcache *regcache, CORE_ADDR pc)
{
  regcache_cooked_write_unsigned (regcache, AMD64_RIP_REGNUM, pc);

  /* We must be careful with modifying the program counter.  If we
     just interrupted a system call, the kernel might try to restart
     it when we resume the inferior.  On restarting the system call,
     the kernel will try backing up the program counter even though it
     no longer points at the system call.  This typically results in a
     SIGSEGV or SIGILL.  We can prevent this by writing `-1' in the
     "orig_rax" pseudo-register.

     Note that "orig_rax" is saved when setting up a dummy call frame.
     This means that it is properly restored when that frame is
     popped, and that the interrupted system call will be restarted
     when we resume the inferior on return from a function call from
     within GDB.  In all other cases the system call will not be
     restarted.  */
  regcache_cooked_write_unsigned (regcache, AMD64_LINUX_ORIG_RAX_REGNUM, -1);
}

/* Record all registers but IP register for process-record.  */

static int
amd64_all_but_ip_registers_record (struct regcache *regcache)
{
  if (record_arch_list_add_reg (regcache, AMD64_RAX_REGNUM))
    return -1;
  if (record_arch_list_add_reg (regcache, AMD64_RCX_REGNUM))
    return -1;
  if (record_arch_list_add_reg (regcache, AMD64_RDX_REGNUM))
    return -1;
  if (record_arch_list_add_reg (regcache, AMD64_RBX_REGNUM))
    return -1;
  if (record_arch_list_add_reg (regcache, AMD64_RSP_REGNUM))
    return -1;
  if (record_arch_list_add_reg (regcache, AMD64_RBP_REGNUM))
    return -1;
  if (record_arch_list_add_reg (regcache, AMD64_RSI_REGNUM))
    return -1;
  if (record_arch_list_add_reg (regcache, AMD64_RDI_REGNUM))
    return -1;
  if (record_arch_list_add_reg (regcache, AMD64_R8_REGNUM))
    return -1;
  if (record_arch_list_add_reg (regcache, AMD64_R9_REGNUM))
    return -1;
  if (record_arch_list_add_reg (regcache, AMD64_R10_REGNUM))
    return -1;
  if (record_arch_list_add_reg (regcache, AMD64_R11_REGNUM))
    return -1;
  if (record_arch_list_add_reg (regcache, AMD64_R12_REGNUM))
    return -1;
  if (record_arch_list_add_reg (regcache, AMD64_R13_REGNUM))
    return -1;
  if (record_arch_list_add_reg (regcache, AMD64_R14_REGNUM))
    return -1;
  if (record_arch_list_add_reg (regcache, AMD64_R15_REGNUM))
    return -1;
  if (record_arch_list_add_reg (regcache, AMD64_EFLAGS_REGNUM))
    return -1;

  return 0;
}

/* amd64_canonicalize_syscall maps from the native amd64 Linux set 
   of syscall ids into a canonical set of syscall ids used by 
   process record.  */

static enum gdb_syscall
amd64_canonicalize_syscall (enum amd64_syscall syscall_number)
{
  switch (syscall_number) {
  case amd64_sys_read:
    return gdb_sys_read;

  case amd64_sys_write:
    return gdb_sys_write;

  case amd64_sys_open:
    return gdb_sys_open;

  case amd64_sys_close:
    return gdb_sys_close;

  case amd64_sys_newstat:
    return gdb_sys_newstat;

  case amd64_sys_newfstat:
    return gdb_sys_newfstat;

  case amd64_sys_newlstat:
    return gdb_sys_newlstat;

  case amd64_sys_poll:
    return gdb_sys_poll;

  case amd64_sys_lseek:
    return gdb_sys_lseek;

  case amd64_sys_mmap:
    return gdb_sys_mmap2;

  case amd64_sys_mprotect:
    return gdb_sys_mprotect;

  case amd64_sys_munmap:
    return gdb_sys_munmap;

  case amd64_sys_brk:
    return gdb_sys_brk;

  case amd64_sys_rt_sigaction:
    return gdb_sys_rt_sigaction;

  case amd64_sys_rt_sigprocmask:
    return gdb_sys_rt_sigprocmask;

  case amd64_sys_rt_sigreturn:
    return gdb_sys_rt_sigreturn;

  case amd64_sys_ioctl:
    return gdb_sys_ioctl;

  case amd64_sys_pread64:
    return gdb_sys_pread64;

  case amd64_sys_pwrite64:
    return gdb_sys_pwrite64;

  case amd64_sys_readv:
    return gdb_sys_readv;

  case amd64_sys_writev:
    return gdb_sys_writev;

  case amd64_sys_access:
    return gdb_sys_access;

  case amd64_sys_pipe:
    return gdb_sys_pipe;

  case amd64_sys_select:
    return gdb_sys_select;

  case amd64_sys_sched_yield:
    return gdb_sys_sched_yield;

  case amd64_sys_mremap:
    return gdb_sys_mremap;

  case amd64_sys_msync:
    return gdb_sys_msync;

  case amd64_sys_mincore:
    return gdb_sys_mincore;

  case amd64_sys_madvise:
    return gdb_sys_madvise;

  case amd64_sys_shmget:
    return gdb_sys_shmget;

  case amd64_sys_shmat:
    return gdb_sys_shmat;

  case amd64_sys_shmctl:
    return gdb_sys_shmctl;

  case amd64_sys_dup:
    return gdb_sys_dup;

  case amd64_sys_dup2:
    return gdb_sys_dup2;

  case amd64_sys_pause:
    return gdb_sys_pause;

  case amd64_sys_nanosleep:
    return gdb_sys_nanosleep;

  case amd64_sys_getitimer:
    return gdb_sys_getitimer;

  case amd64_sys_alarm:
    return gdb_sys_alarm;

  case amd64_sys_setitimer:
    return gdb_sys_setitimer;

  case amd64_sys_getpid:
    return gdb_sys_getpid;

  case amd64_sys_sendfile64:
    return gdb_sys_sendfile64;

  case amd64_sys_socket:
    return gdb_sys_socket;

  case amd64_sys_connect:
    return gdb_sys_connect;

  case amd64_sys_accept:
    return gdb_sys_accept;

  case amd64_sys_sendto:
    return gdb_sys_sendto;

  case amd64_sys_recvfrom:
    return gdb_sys_recvfrom;

  case amd64_sys_sendmsg:
    return gdb_sys_sendmsg;

  case amd64_sys_recvmsg:
    return gdb_sys_recvmsg;

  case amd64_sys_shutdown:
    return gdb_sys_shutdown;

  case amd64_sys_bind:
    return gdb_sys_bind;

  case amd64_sys_listen:
    return gdb_sys_listen;

  case amd64_sys_getsockname:
    return gdb_sys_getsockname;

  case amd64_sys_getpeername:
    return gdb_sys_getpeername;

  case amd64_sys_socketpair:
    return gdb_sys_socketpair;

  case amd64_sys_setsockopt:
    return gdb_sys_setsockopt;

  case amd64_sys_getsockopt:
    return gdb_sys_getsockopt;

  case amd64_sys_clone:
    return gdb_sys_clone;

  case amd64_sys_fork:
    return gdb_sys_fork;

  case amd64_sys_vfork:
    return gdb_sys_vfork;

  case amd64_sys_execve:
    return gdb_sys_execve;

  case amd64_sys_exit:
    return gdb_sys_exit;

  case amd64_sys_wait4:
    return gdb_sys_wait4;

  case amd64_sys_kill:
    return gdb_sys_kill;

  case amd64_sys_uname:
    return gdb_sys_uname;

  case amd64_sys_semget:
    return gdb_sys_semget;

  case amd64_sys_semop:
    return gdb_sys_semop;

  case amd64_sys_semctl:
    return gdb_sys_semctl;

  case amd64_sys_shmdt:
    return gdb_sys_shmdt;

  case amd64_sys_msgget:
    return gdb_sys_msgget;

  case amd64_sys_msgsnd:
    return gdb_sys_msgsnd;

  case amd64_sys_msgrcv:
    return gdb_sys_msgrcv;

  case amd64_sys_msgctl:
    return gdb_sys_msgctl;

  case amd64_sys_fcntl:
    return gdb_sys_fcntl;

  case amd64_sys_flock:
    return gdb_sys_flock;

  case amd64_sys_fsync:
    return gdb_sys_fsync;

  case amd64_sys_fdatasync:
    return gdb_sys_fdatasync;

  case amd64_sys_truncate:
    return gdb_sys_truncate;

  case amd64_sys_ftruncate:
    return gdb_sys_ftruncate;

  case amd64_sys_getdents:
    return gdb_sys_getdents;

  case amd64_sys_getcwd:
    return gdb_sys_getcwd;

  case amd64_sys_chdir:
    return gdb_sys_chdir;

  case amd64_sys_fchdir:
    return gdb_sys_fchdir;

  case amd64_sys_rename:
    return gdb_sys_rename;

  case amd64_sys_mkdir:
    return gdb_sys_mkdir;

  case amd64_sys_rmdir:
    return gdb_sys_rmdir;

  case amd64_sys_creat:
    return gdb_sys_creat;

  case amd64_sys_link:
    return gdb_sys_link;

  case amd64_sys_unlink:
    return gdb_sys_unlink;

  case amd64_sys_symlink:
    return gdb_sys_symlink;

  case amd64_sys_readlink:
    return gdb_sys_readlink;

  case amd64_sys_chmod:
    return gdb_sys_chmod;

  case amd64_sys_fchmod:
    return gdb_sys_fchmod;

  case amd64_sys_chown:
    return gdb_sys_chown;

  case amd64_sys_fchown:
    return gdb_sys_fchown;

  case amd64_sys_lchown:
    return gdb_sys_lchown;

  case amd64_sys_umask:
    return gdb_sys_umask;

  case amd64_sys_gettimeofday:
    return gdb_sys_gettimeofday;

  case amd64_sys_getrlimit:
    return gdb_sys_getrlimit;

  case amd64_sys_getrusage:
    return gdb_sys_getrusage;

  case amd64_sys_sysinfo:
    return gdb_sys_sysinfo;

  case amd64_sys_times:
    return gdb_sys_times;

  case amd64_sys_ptrace:
    return gdb_sys_ptrace;

  case amd64_sys_getuid:
    return gdb_sys_getuid;

  case amd64_sys_syslog:
    return gdb_sys_syslog;

  case amd64_sys_getgid:
    return gdb_sys_getgid;

  case amd64_sys_setuid:
    return gdb_sys_setuid;

  case amd64_sys_setgid:
    return gdb_sys_setgid;

  case amd64_sys_geteuid:
    return gdb_sys_geteuid;

  case amd64_sys_getegid:
    return gdb_sys_getegid;

  case amd64_sys_setpgid:
    return gdb_sys_setpgid;

  case amd64_sys_getppid:
    return gdb_sys_getppid;

  case amd64_sys_getpgrp:
    return gdb_sys_getpgrp;

  case amd64_sys_setsid:
    return gdb_sys_setsid;

  case amd64_sys_setreuid:
    return gdb_sys_setreuid;

  case amd64_sys_setregid:
    return gdb_sys_setregid;

  case amd64_sys_getgroups:
    return gdb_sys_getgroups;

  case amd64_sys_setgroups:
    return gdb_sys_setgroups;

  case amd64_sys_setresuid:
    return gdb_sys_setresuid;

  case amd64_sys_getresuid:
    return gdb_sys_getresuid;

  case amd64_sys_setresgid:
    return gdb_sys_setresgid;

  case amd64_sys_getresgid:
    return gdb_sys_getresgid;

  case amd64_sys_getpgid:
    return gdb_sys_getpgid;

  case amd64_sys_setfsuid:
    return gdb_sys_setfsuid;

  case amd64_sys_setfsgid:
    return gdb_sys_setfsgid;

  case amd64_sys_getsid:
    return gdb_sys_getsid;

  case amd64_sys_capget:
    return gdb_sys_capget;

  case amd64_sys_capset:
    return gdb_sys_capset;

  case amd64_sys_rt_sigpending:
    return gdb_sys_rt_sigpending;

  case amd64_sys_rt_sigtimedwait:
    return gdb_sys_rt_sigtimedwait;

  case amd64_sys_rt_sigqueueinfo:
    return gdb_sys_rt_sigqueueinfo;

  case amd64_sys_rt_sigsuspend:
    return gdb_sys_rt_sigsuspend;

  case amd64_sys_sigaltstack:
    return gdb_sys_sigaltstack;

  case amd64_sys_utime:
    return gdb_sys_utime;

  case amd64_sys_mknod:
    return gdb_sys_mknod;

  case amd64_sys_personality:
    return gdb_sys_personality;

  case amd64_sys_ustat:
    return gdb_sys_ustat;

  case amd64_sys_statfs:
    return gdb_sys_statfs;

  case amd64_sys_fstatfs:
    return gdb_sys_fstatfs;

  case amd64_sys_sysfs:
    return gdb_sys_sysfs;

  case amd64_sys_getpriority:
    return gdb_sys_getpriority;

  case amd64_sys_setpriority:
    return gdb_sys_setpriority;

  case amd64_sys_sched_setparam:
    return gdb_sys_sched_setparam;

  case amd64_sys_sched_getparam:
    return gdb_sys_sched_getparam;

  case amd64_sys_sched_setscheduler:
    return gdb_sys_sched_setscheduler;

  case amd64_sys_sched_getscheduler:
    return gdb_sys_sched_getscheduler;

  case amd64_sys_sched_get_priority_max:
    return gdb_sys_sched_get_priority_max;

  case amd64_sys_sched_get_priority_min:
    return gdb_sys_sched_get_priority_min;

  case amd64_sys_sched_rr_get_interval:
    return gdb_sys_sched_rr_get_interval;

  case amd64_sys_mlock:
    return gdb_sys_mlock;

  case amd64_sys_munlock:
    return gdb_sys_munlock;

  case amd64_sys_mlockall:
    return gdb_sys_mlockall;

  case amd64_sys_munlockall:
    return gdb_sys_munlockall;

  case amd64_sys_vhangup:
    return gdb_sys_vhangup;

  case amd64_sys_modify_ldt:
    return gdb_sys_modify_ldt;

  case amd64_sys_pivot_root:
    return gdb_sys_pivot_root;

  case amd64_sys_sysctl:
    return gdb_sys_sysctl;

  case amd64_sys_prctl:
    return gdb_sys_prctl;

  case amd64_sys_arch_prctl:
    return -1;	/* Note */

  case amd64_sys_adjtimex:
    return gdb_sys_adjtimex;

  case amd64_sys_setrlimit:
    return gdb_sys_setrlimit;

  case amd64_sys_chroot:
    return gdb_sys_chroot;

  case amd64_sys_sync:
    return gdb_sys_sync;

  case amd64_sys_acct:
    return gdb_sys_acct;

  case amd64_sys_settimeofday:
    return gdb_sys_settimeofday;

  case amd64_sys_mount:
    return gdb_sys_mount;

  case amd64_sys_umount:
    return gdb_sys_umount;

  case amd64_sys_swapon:
    return gdb_sys_swapon;

  case amd64_sys_swapoff:
    return gdb_sys_swapoff;

  case amd64_sys_reboot:
    return gdb_sys_reboot;

  case amd64_sys_sethostname:
    return gdb_sys_sethostname;

  case amd64_sys_setdomainname:
    return gdb_sys_setdomainname;

  case amd64_sys_iopl:
    return gdb_sys_iopl;

  case amd64_sys_ioperm:
    return gdb_sys_ioperm;

  case amd64_sys_init_module:
    return gdb_sys_init_module;

  case amd64_sys_delete_module:
    return gdb_sys_delete_module;

  case amd64_sys_quotactl:
    return gdb_sys_quotactl;

  case amd64_sys_nfsservctl:
    return gdb_sys_nfsservctl;

  case amd64_sys_gettid:
    return gdb_sys_gettid;

  case amd64_sys_readahead:
    return gdb_sys_readahead;

  case amd64_sys_setxattr:
    return gdb_sys_setxattr;

  case amd64_sys_lsetxattr:
    return gdb_sys_lsetxattr;

  case amd64_sys_fsetxattr:
    return gdb_sys_fsetxattr;

  case amd64_sys_getxattr:
    return gdb_sys_getxattr;

  case amd64_sys_lgetxattr:
    return gdb_sys_lgetxattr;

  case amd64_sys_fgetxattr:
    return gdb_sys_fgetxattr;

  case amd64_sys_listxattr:
    return gdb_sys_listxattr;

  case amd64_sys_llistxattr:
    return gdb_sys_llistxattr;

  case amd64_sys_flistxattr:
    return gdb_sys_flistxattr;

  case amd64_sys_removexattr:
    return gdb_sys_removexattr;

  case amd64_sys_lremovexattr:
    return gdb_sys_lremovexattr;

  case amd64_sys_fremovexattr:
    return gdb_sys_fremovexattr;

  case amd64_sys_tkill:
    return gdb_sys_tkill;

  case amd64_sys_time:
    return gdb_sys_time;

  case amd64_sys_futex:
    return gdb_sys_futex;

  case amd64_sys_sched_setaffinity:
    return gdb_sys_sched_setaffinity;

  case amd64_sys_sched_getaffinity:
    return gdb_sys_sched_getaffinity;

  case amd64_sys_io_setup:
    return gdb_sys_io_setup;

  case amd64_sys_io_destroy:
    return gdb_sys_io_destroy;

  case amd64_sys_io_getevents:
    return gdb_sys_io_getevents;

  case amd64_sys_io_submit:
    return gdb_sys_io_submit;

  case amd64_sys_io_cancel:
    return gdb_sys_io_cancel;

  case amd64_sys_lookup_dcookie:
    return gdb_sys_lookup_dcookie;

  case amd64_sys_epoll_create:
    return gdb_sys_epoll_create;

  case amd64_sys_remap_file_pages:
    return gdb_sys_remap_file_pages;

  case amd64_sys_getdents64:
    return gdb_sys_getdents64;

  case amd64_sys_set_tid_address:
    return gdb_sys_set_tid_address;

  case amd64_sys_restart_syscall:
    return gdb_sys_restart_syscall;

  case amd64_sys_semtimedop:
    return gdb_sys_semtimedop;

  case amd64_sys_fadvise64:
    return gdb_sys_fadvise64;

  case amd64_sys_timer_create:
    return gdb_sys_timer_create;

  case amd64_sys_timer_settime:
    return gdb_sys_timer_settime;

  case amd64_sys_timer_gettime:
    return gdb_sys_timer_gettime;

  case amd64_sys_timer_getoverrun:
    return gdb_sys_timer_getoverrun;

  case amd64_sys_timer_delete:
    return gdb_sys_timer_delete;

  case amd64_sys_clock_settime:
    return gdb_sys_clock_settime;

  case amd64_sys_clock_gettime:
    return gdb_sys_clock_gettime;

  case amd64_sys_clock_getres:
    return gdb_sys_clock_getres;

  case amd64_sys_clock_nanosleep:
    return gdb_sys_clock_nanosleep;

  case amd64_sys_exit_group:
    return gdb_sys_exit_group;

  case amd64_sys_epoll_wait:
    return gdb_sys_epoll_wait;

  case amd64_sys_epoll_ctl:
    return gdb_sys_epoll_ctl;

  case amd64_sys_tgkill:
    return gdb_sys_tgkill;

  case amd64_sys_utimes:
    return gdb_sys_utimes;

  case amd64_sys_mbind:
    return gdb_sys_mbind;

  case amd64_sys_set_mempolicy:
    return gdb_sys_set_mempolicy;

  case amd64_sys_get_mempolicy:
    return gdb_sys_get_mempolicy;

  case amd64_sys_mq_open:
    return gdb_sys_mq_open;

  case amd64_sys_mq_unlink:
    return gdb_sys_mq_unlink;

  case amd64_sys_mq_timedsend:
    return gdb_sys_mq_timedsend;

  case amd64_sys_mq_timedreceive:
    return gdb_sys_mq_timedreceive;

  case amd64_sys_mq_notify:
    return gdb_sys_mq_notify;

  case amd64_sys_mq_getsetattr:
    return gdb_sys_mq_getsetattr;

  case amd64_sys_kexec_load:
    return gdb_sys_kexec_load;

  case amd64_sys_waitid:
    return gdb_sys_waitid;

  case amd64_sys_add_key:
    return gdb_sys_add_key;

  case amd64_sys_request_key:
    return gdb_sys_request_key;

  case amd64_sys_keyctl:
    return gdb_sys_keyctl;

  case amd64_sys_ioprio_set:
    return gdb_sys_ioprio_set;

  case amd64_sys_ioprio_get:
    return gdb_sys_ioprio_get;

  case amd64_sys_inotify_init:
    return gdb_sys_inotify_init;

  case amd64_sys_inotify_add_watch:
    return gdb_sys_inotify_add_watch;

  case amd64_sys_inotify_rm_watch:
    return gdb_sys_inotify_rm_watch;

  case amd64_sys_migrate_pages:
    return gdb_sys_migrate_pages;

  case amd64_sys_openat:
    return gdb_sys_openat;

  case amd64_sys_mkdirat:
    return gdb_sys_mkdirat;

  case amd64_sys_mknodat:
    return gdb_sys_mknodat;

  case amd64_sys_fchownat:
    return gdb_sys_fchownat;

  case amd64_sys_futimesat:
    return gdb_sys_futimesat;

  case amd64_sys_newfstatat:
    return gdb_sys_newfstatat;

  case amd64_sys_unlinkat:
    return gdb_sys_unlinkat;

  case amd64_sys_renameat:
    return gdb_sys_renameat;

  case amd64_sys_linkat:
    return gdb_sys_linkat;

  case amd64_sys_symlinkat:
    return gdb_sys_symlinkat;

  case amd64_sys_readlinkat:
    return gdb_sys_readlinkat;

  case amd64_sys_fchmodat:
    return gdb_sys_fchmodat;

  case amd64_sys_faccessat:
    return gdb_sys_faccessat;

  case amd64_sys_pselect6:
    return gdb_sys_pselect6;

  case amd64_sys_ppoll:
    return gdb_sys_ppoll;

  case amd64_sys_unshare:
    return gdb_sys_unshare;

  case amd64_sys_set_robust_list:
    return gdb_sys_set_robust_list;

  case amd64_sys_get_robust_list:
    return gdb_sys_get_robust_list;

  case amd64_sys_splice:
    return gdb_sys_splice;

  case amd64_sys_tee:
    return gdb_sys_tee;

  case amd64_sys_sync_file_range:
    return gdb_sys_sync_file_range;

  case amd64_sys_vmsplice:
    return gdb_sys_vmsplice;

  case amd64_sys_move_pages:
    return gdb_sys_move_pages;

  default:
    return -1;
  }
}

/* Parse the arguments of current system call instruction and record
   the values of the registers and memory that will be changed into
   "record_arch_list".  This instruction is "syscall".

   Return -1 if something wrong.  */

static struct linux_record_tdep amd64_linux_record_tdep;

#define RECORD_ARCH_GET_FS	0x1003
#define RECORD_ARCH_GET_GS	0x1004

static int
amd64_linux_syscall_record (struct regcache *regcache)
{
  int ret;
  ULONGEST syscall_native;
  enum gdb_syscall syscall_gdb = -1;

  regcache_raw_read_unsigned (regcache, AMD64_RAX_REGNUM, &syscall_native);

  switch (syscall_native)
    {
    case amd64_sys_rt_sigreturn:
      if (amd64_all_but_ip_registers_record (regcache))
        return -1;
      return 0;
      break;

    case amd64_sys_arch_prctl:
      {
	ULONGEST arg3;

	regcache_raw_read_unsigned (regcache, amd64_linux_record_tdep.arg3,
				    &arg3);
	if (arg3 == RECORD_ARCH_GET_FS || arg3 == RECORD_ARCH_GET_GS)
	  {
	    CORE_ADDR addr;

	    regcache_raw_read_unsigned (regcache,
					amd64_linux_record_tdep.arg2,
					&addr);
	    if (record_arch_list_add_mem (addr,
					  amd64_linux_record_tdep.size_ulong))
	      return -1;
	  }
	goto record_regs;
      }
      break;
    }

  syscall_gdb = amd64_canonicalize_syscall (syscall_native);

  if (syscall_gdb < 0)
    {
      printf_unfiltered (_("Process record and replay target doesn't "
                           "support syscall number %s\n"), 
			 pulongest (syscall_native));
      return -1;
    }
  else
    {
      ret = record_linux_system_call (syscall_gdb, regcache,
                                      &amd64_linux_record_tdep);
      if (ret)
        return ret;
    }

 record_regs:
  /* Record the return value of the system call.  */
  if (record_arch_list_add_reg (regcache, AMD64_RCX_REGNUM))
    return -1;
  if (record_arch_list_add_reg (regcache, AMD64_R11_REGNUM))
    return -1;

  return 0;
}

#define AMD64_LINUX_redzone    128
#define AMD64_LINUX_xstate     512
#define AMD64_LINUX_frame_size 560

static int
amd64_linux_record_signal (struct gdbarch *gdbarch,
                           struct regcache *regcache,
                           enum gdb_signal signal)
{
  ULONGEST rsp;

  if (amd64_all_but_ip_registers_record (regcache))
    return -1;

  if (record_arch_list_add_reg (regcache, AMD64_RIP_REGNUM))
    return -1;

  /* Record the change in the stack.  */
  regcache_raw_read_unsigned (regcache, AMD64_RSP_REGNUM, &rsp);
  /* redzone
     sp -= 128; */
  rsp -= AMD64_LINUX_redzone;
  /* This is for xstate.
     sp -= sizeof (struct _fpstate);  */
  rsp -= AMD64_LINUX_xstate;
  /* This is for frame_size.
     sp -= sizeof (struct rt_sigframe);  */
  rsp -= AMD64_LINUX_frame_size;
  if (record_arch_list_add_mem (rsp, AMD64_LINUX_redzone
                                     + AMD64_LINUX_xstate
                                     + AMD64_LINUX_frame_size))
    return -1;

  if (record_arch_list_add_end ())
    return -1;

  return 0;
}

/* Get Linux/x86 target description from core dump.  */

static const struct target_desc *
amd64_linux_core_read_description (struct gdbarch *gdbarch,
				  struct target_ops *target,
				  bfd *abfd)
{
  /* Linux/x86-64.  */
  uint64_t xcr0 = i386_linux_core_read_xcr0 (gdbarch, target, abfd);
  switch ((xcr0 & I386_XSTATE_AVX_MASK))
    {
    case I386_XSTATE_AVX_MASK:
      if (gdbarch_ptr_bit (gdbarch) == 32)
	return tdesc_x32_avx_linux;
      else
	return tdesc_amd64_avx_linux;
    default:
      if (gdbarch_ptr_bit (gdbarch) == 32)
	return tdesc_x32_linux;
      else
	return tdesc_amd64_linux;
    }
}

static void
amd64_linux_init_abi_common(struct gdbarch_info info, struct gdbarch *gdbarch)
{
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

  linux_init_abi (info, gdbarch);

  tdep->sigtramp_p = amd64_linux_sigtramp_p;
  tdep->sigcontext_addr = amd64_linux_sigcontext_addr;
  tdep->sc_reg_offset = amd64_linux_sc_reg_offset;
  tdep->sc_num_regs = ARRAY_SIZE (amd64_linux_sc_reg_offset);

  tdep->xsave_xcr0_offset = I386_LINUX_XSAVE_XCR0_OFFSET;

  /* Add the %orig_rax register used for syscall restarting.  */
  set_gdbarch_write_pc (gdbarch, amd64_linux_write_pc);

  tdep->register_reggroup_p = amd64_linux_register_reggroup_p;

  /* Functions for 'catch syscall'.  */
  set_xml_syscall_file_name (XML_SYSCALL_FILENAME_AMD64);
  set_gdbarch_get_syscall_number (gdbarch,
                                  amd64_linux_get_syscall_number);

  /* Enable TLS support.  */
  set_gdbarch_fetch_tls_load_module_address (gdbarch,
                                             svr4_fetch_objfile_link_map);

  /* GNU/Linux uses SVR4-style shared libraries.  */
  set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);

  /* GNU/Linux uses the dynamic linker included in the GNU C Library.  */
  set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);

  /* Install supported register note sections.  */
  set_gdbarch_core_regset_sections (gdbarch, amd64_linux_regset_sections);

  set_gdbarch_core_read_description (gdbarch,
				     amd64_linux_core_read_description);

  /* Displaced stepping.  */
  set_gdbarch_displaced_step_copy_insn (gdbarch,
                                        amd64_displaced_step_copy_insn);
  set_gdbarch_displaced_step_fixup (gdbarch, amd64_displaced_step_fixup);
  set_gdbarch_displaced_step_free_closure (gdbarch,
                                           simple_displaced_step_free_closure);
  set_gdbarch_displaced_step_location (gdbarch,
                                       displaced_step_at_entry_point);

  set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type);

  set_gdbarch_process_record (gdbarch, i386_process_record);
  set_gdbarch_process_record_signal (gdbarch, amd64_linux_record_signal);

  /* Initialize the amd64_linux_record_tdep.  */
  /* These values are the size of the type that will be used in a system
     call.  They are obtained from Linux Kernel source.  */
  amd64_linux_record_tdep.size_pointer
    = gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT;
  amd64_linux_record_tdep.size__old_kernel_stat = 32;
  amd64_linux_record_tdep.size_tms = 32;
  amd64_linux_record_tdep.size_loff_t = 8;
  amd64_linux_record_tdep.size_flock = 32;
  amd64_linux_record_tdep.size_oldold_utsname = 45;
  amd64_linux_record_tdep.size_ustat = 32;
  /* ADM64 doesn't need this size because it doesn't have sys_sigaction
     but sys_rt_sigaction.  */
  amd64_linux_record_tdep.size_old_sigaction = 152;
  /* ADM64 doesn't need this size because it doesn't have sys_sigpending
     but sys_rt_sigpending.  */
  amd64_linux_record_tdep.size_old_sigset_t = 128;
  amd64_linux_record_tdep.size_rlimit = 16;
  amd64_linux_record_tdep.size_rusage = 144;
  amd64_linux_record_tdep.size_timeval = 16;
  amd64_linux_record_tdep.size_timezone = 8;
  /* ADM64 doesn't need this size because it doesn't have sys_getgroups16
     but sys_getgroups.  */
  amd64_linux_record_tdep.size_old_gid_t = 2;
  /* ADM64 doesn't need this size because it doesn't have sys_getresuid16
     but sys_getresuid.  */
  amd64_linux_record_tdep.size_old_uid_t = 2;
  amd64_linux_record_tdep.size_fd_set = 128;
  amd64_linux_record_tdep.size_dirent = 280;
  amd64_linux_record_tdep.size_dirent64 = 280;
  amd64_linux_record_tdep.size_statfs = 120;
  amd64_linux_record_tdep.size_statfs64 = 120;
  amd64_linux_record_tdep.size_sockaddr = 16;
  amd64_linux_record_tdep.size_int
    = gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT;
  amd64_linux_record_tdep.size_long
    = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
  amd64_linux_record_tdep.size_ulong
    = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
  amd64_linux_record_tdep.size_msghdr = 56;
  amd64_linux_record_tdep.size_itimerval = 32;
  amd64_linux_record_tdep.size_stat = 144;
  amd64_linux_record_tdep.size_old_utsname = 325;
  amd64_linux_record_tdep.size_sysinfo = 112;
  amd64_linux_record_tdep.size_msqid_ds = 120;
  amd64_linux_record_tdep.size_shmid_ds = 112;
  amd64_linux_record_tdep.size_new_utsname = 390;
  amd64_linux_record_tdep.size_timex = 208;
  amd64_linux_record_tdep.size_mem_dqinfo = 24;
  amd64_linux_record_tdep.size_if_dqblk = 72;
  amd64_linux_record_tdep.size_fs_quota_stat = 80;
  amd64_linux_record_tdep.size_timespec = 16;
  amd64_linux_record_tdep.size_pollfd = 8;
  amd64_linux_record_tdep.size_NFS_FHSIZE = 32;
  amd64_linux_record_tdep.size_knfsd_fh = 132;
  amd64_linux_record_tdep.size_TASK_COMM_LEN = 16;
  amd64_linux_record_tdep.size_sigaction = 152;
  amd64_linux_record_tdep.size_sigset_t = 128;
  amd64_linux_record_tdep.size_siginfo_t = 128;
  amd64_linux_record_tdep.size_cap_user_data_t = 8;
  amd64_linux_record_tdep.size_stack_t = 24;
  amd64_linux_record_tdep.size_off_t = 8;
  amd64_linux_record_tdep.size_stat64 = 144;
  amd64_linux_record_tdep.size_gid_t = 4;
  amd64_linux_record_tdep.size_uid_t = 4;
  amd64_linux_record_tdep.size_PAGE_SIZE = 4096;
  amd64_linux_record_tdep.size_flock64 = 32;
  amd64_linux_record_tdep.size_user_desc = 16;
  amd64_linux_record_tdep.size_io_event = 32;
  amd64_linux_record_tdep.size_iocb = 64;
  amd64_linux_record_tdep.size_epoll_event = 12;
  amd64_linux_record_tdep.size_itimerspec = 32;
  amd64_linux_record_tdep.size_mq_attr = 64;
  amd64_linux_record_tdep.size_siginfo = 128;
  amd64_linux_record_tdep.size_termios = 60;
  amd64_linux_record_tdep.size_termios2 = 44;
  amd64_linux_record_tdep.size_pid_t = 4;
  amd64_linux_record_tdep.size_winsize = 8;
  amd64_linux_record_tdep.size_serial_struct = 72;
  amd64_linux_record_tdep.size_serial_icounter_struct = 80;
  amd64_linux_record_tdep.size_hayes_esp_config = 12;
  amd64_linux_record_tdep.size_size_t = 8;
  amd64_linux_record_tdep.size_iovec = 16;

  /* These values are the second argument of system call "sys_ioctl".
     They are obtained from Linux Kernel source.  */
  amd64_linux_record_tdep.ioctl_TCGETS = 0x5401;
  amd64_linux_record_tdep.ioctl_TCSETS = 0x5402;
  amd64_linux_record_tdep.ioctl_TCSETSW = 0x5403;
  amd64_linux_record_tdep.ioctl_TCSETSF = 0x5404;
  amd64_linux_record_tdep.ioctl_TCGETA = 0x5405;
  amd64_linux_record_tdep.ioctl_TCSETA = 0x5406;
  amd64_linux_record_tdep.ioctl_TCSETAW = 0x5407;
  amd64_linux_record_tdep.ioctl_TCSETAF = 0x5408;
  amd64_linux_record_tdep.ioctl_TCSBRK = 0x5409;
  amd64_linux_record_tdep.ioctl_TCXONC = 0x540A;
  amd64_linux_record_tdep.ioctl_TCFLSH = 0x540B;
  amd64_linux_record_tdep.ioctl_TIOCEXCL = 0x540C;
  amd64_linux_record_tdep.ioctl_TIOCNXCL = 0x540D;
  amd64_linux_record_tdep.ioctl_TIOCSCTTY = 0x540E;
  amd64_linux_record_tdep.ioctl_TIOCGPGRP = 0x540F;
  amd64_linux_record_tdep.ioctl_TIOCSPGRP = 0x5410;
  amd64_linux_record_tdep.ioctl_TIOCOUTQ = 0x5411;
  amd64_linux_record_tdep.ioctl_TIOCSTI = 0x5412;
  amd64_linux_record_tdep.ioctl_TIOCGWINSZ = 0x5413;
  amd64_linux_record_tdep.ioctl_TIOCSWINSZ = 0x5414;
  amd64_linux_record_tdep.ioctl_TIOCMGET = 0x5415;
  amd64_linux_record_tdep.ioctl_TIOCMBIS = 0x5416;
  amd64_linux_record_tdep.ioctl_TIOCMBIC = 0x5417;
  amd64_linux_record_tdep.ioctl_TIOCMSET = 0x5418;
  amd64_linux_record_tdep.ioctl_TIOCGSOFTCAR = 0x5419;
  amd64_linux_record_tdep.ioctl_TIOCSSOFTCAR = 0x541A;
  amd64_linux_record_tdep.ioctl_FIONREAD = 0x541B;
  amd64_linux_record_tdep.ioctl_TIOCINQ
    = amd64_linux_record_tdep.ioctl_FIONREAD;
  amd64_linux_record_tdep.ioctl_TIOCLINUX = 0x541C;
  amd64_linux_record_tdep.ioctl_TIOCCONS = 0x541D;
  amd64_linux_record_tdep.ioctl_TIOCGSERIAL = 0x541E;
  amd64_linux_record_tdep.ioctl_TIOCSSERIAL = 0x541F;
  amd64_linux_record_tdep.ioctl_TIOCPKT = 0x5420;
  amd64_linux_record_tdep.ioctl_FIONBIO = 0x5421;
  amd64_linux_record_tdep.ioctl_TIOCNOTTY = 0x5422;
  amd64_linux_record_tdep.ioctl_TIOCSETD = 0x5423;
  amd64_linux_record_tdep.ioctl_TIOCGETD = 0x5424;
  amd64_linux_record_tdep.ioctl_TCSBRKP = 0x5425;
  amd64_linux_record_tdep.ioctl_TIOCTTYGSTRUCT = 0x5426;
  amd64_linux_record_tdep.ioctl_TIOCSBRK = 0x5427;
  amd64_linux_record_tdep.ioctl_TIOCCBRK = 0x5428;
  amd64_linux_record_tdep.ioctl_TIOCGSID = 0x5429;
  amd64_linux_record_tdep.ioctl_TCGETS2 = 0x802c542a;
  amd64_linux_record_tdep.ioctl_TCSETS2 = 0x402c542b;
  amd64_linux_record_tdep.ioctl_TCSETSW2 = 0x402c542c;
  amd64_linux_record_tdep.ioctl_TCSETSF2 = 0x402c542d;
  amd64_linux_record_tdep.ioctl_TIOCGPTN = 0x80045430;
  amd64_linux_record_tdep.ioctl_TIOCSPTLCK = 0x40045431;
  amd64_linux_record_tdep.ioctl_FIONCLEX = 0x5450;
  amd64_linux_record_tdep.ioctl_FIOCLEX = 0x5451;
  amd64_linux_record_tdep.ioctl_FIOASYNC = 0x5452;
  amd64_linux_record_tdep.ioctl_TIOCSERCONFIG = 0x5453;
  amd64_linux_record_tdep.ioctl_TIOCSERGWILD = 0x5454;
  amd64_linux_record_tdep.ioctl_TIOCSERSWILD = 0x5455;
  amd64_linux_record_tdep.ioctl_TIOCGLCKTRMIOS = 0x5456;
  amd64_linux_record_tdep.ioctl_TIOCSLCKTRMIOS = 0x5457;
  amd64_linux_record_tdep.ioctl_TIOCSERGSTRUCT = 0x5458;
  amd64_linux_record_tdep.ioctl_TIOCSERGETLSR = 0x5459;
  amd64_linux_record_tdep.ioctl_TIOCSERGETMULTI = 0x545A;
  amd64_linux_record_tdep.ioctl_TIOCSERSETMULTI = 0x545B;
  amd64_linux_record_tdep.ioctl_TIOCMIWAIT = 0x545C;
  amd64_linux_record_tdep.ioctl_TIOCGICOUNT = 0x545D;
  amd64_linux_record_tdep.ioctl_TIOCGHAYESESP = 0x545E;
  amd64_linux_record_tdep.ioctl_TIOCSHAYESESP = 0x545F;
  amd64_linux_record_tdep.ioctl_FIOQSIZE = 0x5460;

  /* These values are the second argument of system call "sys_fcntl"
     and "sys_fcntl64".  They are obtained from Linux Kernel source.  */
  amd64_linux_record_tdep.fcntl_F_GETLK = 5;
  amd64_linux_record_tdep.fcntl_F_GETLK64 = 12;
  amd64_linux_record_tdep.fcntl_F_SETLK64 = 13;
  amd64_linux_record_tdep.fcntl_F_SETLKW64 = 14;

  amd64_linux_record_tdep.arg1 = AMD64_RDI_REGNUM;
  amd64_linux_record_tdep.arg2 = AMD64_RSI_REGNUM;
  amd64_linux_record_tdep.arg3 = AMD64_RDX_REGNUM;
  amd64_linux_record_tdep.arg4 = AMD64_R10_REGNUM;
  amd64_linux_record_tdep.arg5 = AMD64_R8_REGNUM;
  amd64_linux_record_tdep.arg6 = AMD64_R9_REGNUM;

  tdep->i386_syscall_record = amd64_linux_syscall_record;
}

static void
amd64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  const struct target_desc *tdesc = info.target_desc;
  struct tdesc_arch_data *tdesc_data = (void *) info.tdep_info;
  const struct tdesc_feature *feature;
  int valid_p;

  gdb_assert (tdesc_data);

  tdep->gregset_reg_offset = amd64_linux_gregset_reg_offset;
  tdep->gregset_num_regs = ARRAY_SIZE (amd64_linux_gregset_reg_offset);
  tdep->sizeof_gregset = 27 * 8;

  amd64_init_abi (info, gdbarch);

  /* Reserve a number for orig_rax.  */
  set_gdbarch_num_regs (gdbarch, AMD64_LINUX_NUM_REGS);

  if (! tdesc_has_registers (tdesc))
    tdesc = tdesc_amd64_linux;
  tdep->tdesc = tdesc;

  feature = tdesc_find_feature (tdesc, "org.gnu.gdb.i386.linux");
  if (feature == NULL)
    return;

  valid_p = tdesc_numbered_register (feature, tdesc_data,
				     AMD64_LINUX_ORIG_RAX_REGNUM,
				     "orig_rax");
  if (!valid_p)
    return;

  amd64_linux_init_abi_common (info, gdbarch);

  /* GNU/Linux uses SVR4-style shared libraries.  */
  set_solib_svr4_fetch_link_map_offsets
    (gdbarch, svr4_lp64_fetch_link_map_offsets);
}

static void
amd64_x32_linux_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
{
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  const struct target_desc *tdesc = info.target_desc;
  struct tdesc_arch_data *tdesc_data = (void *) info.tdep_info;
  const struct tdesc_feature *feature;
  int valid_p;

  gdb_assert (tdesc_data);

  tdep->gregset_reg_offset = amd64_linux_gregset_reg_offset;
  tdep->gregset_num_regs = ARRAY_SIZE (amd64_linux_gregset_reg_offset);
  tdep->sizeof_gregset = 27 * 8;

  amd64_x32_init_abi (info, gdbarch);

  /* Reserve a number for orig_rax.  */
  set_gdbarch_num_regs (gdbarch, AMD64_LINUX_NUM_REGS);

  if (! tdesc_has_registers (tdesc))
    tdesc = tdesc_x32_linux;
  tdep->tdesc = tdesc;

  feature = tdesc_find_feature (tdesc, "org.gnu.gdb.i386.linux");
  if (feature == NULL)
    return;

  valid_p = tdesc_numbered_register (feature, tdesc_data,
				     AMD64_LINUX_ORIG_RAX_REGNUM,
				     "orig_rax");
  if (!valid_p)
    return;

  amd64_linux_init_abi_common (info, gdbarch);

  /* GNU/Linux uses SVR4-style shared libraries.  */
  set_solib_svr4_fetch_link_map_offsets
    (gdbarch, svr4_ilp32_fetch_link_map_offsets);
}


/* Provide a prototype to silence -Wmissing-prototypes.  */
extern void _initialize_amd64_linux_tdep (void);

void
_initialize_amd64_linux_tdep (void)
{
  gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
			  GDB_OSABI_LINUX, amd64_linux_init_abi);
  gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x64_32,
			  GDB_OSABI_LINUX, amd64_x32_linux_init_abi);

  /* Initialize the Linux target description.  */
  initialize_tdesc_amd64_linux ();
  initialize_tdesc_amd64_avx_linux ();
  initialize_tdesc_x32_linux ();
  initialize_tdesc_x32_avx_linux ();
}