File: syswrap-arm-linux.c

package info (click to toggle)
valgrind 1:3.14.0-3
  • links: PTS, VCS
  • area: main
  • in suites: buster, sid
  • size: 156,980 kB
  • sloc: ansic: 728,128; exp: 26,134; xml: 22,268; cpp: 7,638; asm: 7,312; makefile: 6,102; perl: 5,910; sh: 5,717
file content (1062 lines) | stat: -rw-r--r-- 44,160 bytes parent folder | download
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

/*--------------------------------------------------------------------*/
/*--- Platform-specific syscalls stuff.      syswrap-arm-linux.c -----*/
/*--------------------------------------------------------------------*/

/*
   This file is part of Valgrind, a dynamic binary instrumentation
   framework.

   Copyright (C) 2000-2017 Nicholas Nethercote
      njn@valgrind.org
   Copyright (C) 2008-2017 Evan Geller
      gaze@bea.ms

   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 2 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, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307, USA.

   The GNU General Public License is contained in the file COPYING.
*/

#if defined(VGP_arm_linux)

#include "pub_core_basics.h"
#include "pub_core_vki.h"
#include "pub_core_vkiscnums.h"
#include "pub_core_threadstate.h"
#include "pub_core_aspacemgr.h"
#include "pub_core_debuglog.h"
#include "pub_core_libcbase.h"
#include "pub_core_libcassert.h"
#include "pub_core_libcprint.h"
#include "pub_core_libcproc.h"
#include "pub_core_libcsignal.h"
#include "pub_core_options.h"
#include "pub_core_scheduler.h"
#include "pub_core_sigframe.h"      // For VG_(sigframe_destroy)()
#include "pub_core_signals.h"
#include "pub_core_syscall.h"
#include "pub_core_syswrap.h"
#include "pub_core_tooliface.h"
#include "pub_core_transtab.h"      // VG_(discard_translations)

#include "priv_types_n_macros.h"
#include "priv_syswrap-generic.h"   /* for decls of generic wrappers */
#include "priv_syswrap-linux.h"     /* for decls of linux-ish wrappers */
#include "priv_syswrap-main.h"


/* ---------------------------------------------------------------------
   clone() handling
   ------------------------------------------------------------------ */

/* Call f(arg1), but first switch stacks, using 'stack' as the new
   stack, and use 'retaddr' as f's return-to address.  Also, clear all
   the integer registers before entering f.*/
__attribute__((noreturn))
void ML_(call_on_new_stack_0_1) ( Addr stack,
                                  Addr retaddr,
                                  void (*f)(Word),
                                  Word arg1 );
//    r0 = stack
//    r1 = retaddr
//    r2 = f
//    r3 = arg1
asm(
".text\n"
".globl vgModuleLocal_call_on_new_stack_0_1\n"
"vgModuleLocal_call_on_new_stack_0_1:\n"
"   mov    sp,r0\n\t" /* Stack pointer */
"   mov    lr,r1\n\t" /* Return address */
"   mov    r0,r3\n\t" /* First argument */
"   push   {r2}\n\t"  /* So we can ret to the new dest */
"   mov    r1, #0\n\t" /* Clear our GPRs */
"   mov    r2, #0\n\t"
"   mov    r3, #0\n\t"
"   mov    r4, #0\n\t"
"   mov    r5, #0\n\t"
"   mov    r6, #0\n\t"
"   mov    r7, #0\n\t"
"   mov    r8, #0\n\t"
"   mov    r9, #0\n\t"
"   mov    r10, #0\n\t"
"   mov    r11, #0\n\t"
"   mov    r12, #0\n\t"
"   pop    {pc}\n\t"  /* Herrre we go! */
".previous\n"
);


#define __NR_CLONE        VG_STRINGIFY(__NR_clone)
#define __NR_EXIT         VG_STRINGIFY(__NR_exit)

// See priv_syswrap-linux.h for arg profile.
asm(
".text\n"
".globl do_syscall_clone_arm_linux\n"
"do_syscall_clone_arm_linux:\n"

/*Setup child stack */
"   str     r0, [r1, #-4]!\n"
"   str     r3, [r1, #-4]!\n"
"   push {r4,r7}\n" 
"   mov r0, r2\n" /* arg1: flags */
/* r1 (arg2) is already our child's stack */
"   ldr r2, [sp, #12]\n" // parent tid
"   ldr r3, [sp, #16]\n" // tls
"   ldr r4, [sp, #8]\n" // Child tid
"   mov r7, #"__NR_CLONE"\n"
"   svc 0x00000000\n"
"   cmp r0, #0\n"
"   beq 1f\n"

/* Parent */
"   pop {r4,r7}\n"
"   bx lr\n"

"1:\n" /*child*/
"   mov     lr, pc\n"
"   pop     {r0,pc}\n"
/* Retval from child is already in r0 */
"   mov r7, #"__NR_EXIT"\n"
"   svc 0x00000000\n"
/* Urh.. why did exit return? */
"   .long 0\n"
"   .previous\n"
);

#undef __NR_CLONE
#undef __NR_EXIT

// forward declarations
static SysRes sys_set_tls ( ThreadId tid, Addr tlsptr );
            
/* ---------------------------------------------------------------------
   More thread stuff
   ------------------------------------------------------------------ */

// ARM doesn't have any architecture specific thread stuff that
// needs to be cleaned up
void VG_(cleanup_thread) ( ThreadArchState* arch )
{
}  

/* Assigns tlsptr to the guest TPIDRURO.
   If needed for the specific hardware, really executes
   the set_tls syscall.
*/
static SysRes sys_set_tls ( ThreadId tid, Addr tlsptr )
{
   VG_(threads)[tid].arch.vex.guest_TPIDRURO = tlsptr;

   if (KernelVariantiS(KernelVariant_android_no_hw_tls,
                       VG_(clo_kernel_variant))) {
      /* Android emulator does not provide an hw tls register.
         So, the tls register is emulated by the kernel.
         This emulated value is set by the __NR_ARM_set_tls syscall.
         The emulated value must be read by the kernel helper function
         located at 0xffff0fe0.
      
         The emulated tlsptr is located at 0xffff0ff0
         (so slightly after the kernel helper function).
         Note that applications are not supposed to read this directly.
      
         For compatibility : if there is a hw tls register, the kernel
         will put at 0xffff0fe0 the instructions to read it, so
         as to have old applications calling the kernel helper
         working properly.

         For having emulated guest TLS working correctly with
         Valgrind, it is needed to execute the syscall to set
         the emulated TLS value in addition to the assignment
         of TPIDRURO.

         Note: the below means that if we need thread local storage
         for Valgrind host, then there will be a conflict between
         the need of the guest tls and of the host tls.
         If all the guest code would cleanly call 0xffff0fe0,
         then we might maybe intercept this. However, at least
         __libc_preinit reads directly 0xffff0ff0.
      */
      /* ??? might call the below if auxv->u.a_val & VKI_HWCAP_TLS ???
         Unclear if real hardware having tls hw register sets
         VKI_HWCAP_TLS. */
      return VG_(do_syscall1) (__NR_ARM_set_tls, tlsptr);
   } else {
      return VG_(mk_SysRes_Success)( 0 );
   }
}

/* ---------------------------------------------------------------------
   PRE/POST wrappers for arm/Linux-specific syscalls
   ------------------------------------------------------------------ */

#define PRE(name)       DEFN_PRE_TEMPLATE(arm_linux, name)
#define POST(name)      DEFN_POST_TEMPLATE(arm_linux, name)

/* Add prototypes for the wrappers declared here, so that gcc doesn't
   harass us for not having prototypes.  Really this is a kludge --
   the right thing to do is to make these wrappers 'static' since they
   aren't visible outside this file, but that requires even more macro
   magic. */

DECL_TEMPLATE(arm_linux, sys_mmap2);
DECL_TEMPLATE(arm_linux, sys_stat64);
DECL_TEMPLATE(arm_linux, sys_lstat64);
DECL_TEMPLATE(arm_linux, sys_fstatat64);
DECL_TEMPLATE(arm_linux, sys_fstat64);
DECL_TEMPLATE(arm_linux, sys_sigreturn);
DECL_TEMPLATE(arm_linux, sys_rt_sigreturn);
DECL_TEMPLATE(arm_linux, sys_sigsuspend);
DECL_TEMPLATE(arm_linux, sys_set_tls);
DECL_TEMPLATE(arm_linux, sys_cacheflush);
DECL_TEMPLATE(arm_linux, sys_ptrace);

PRE(sys_mmap2)
{
   SysRes r;

   // Exactly like old_mmap() except:
   //  - all 6 args are passed in regs, rather than in a memory-block.
   //  - the file offset is specified in pagesize units rather than bytes,
   //    so that it can be used for files bigger than 2^32 bytes.
   // pagesize or 4K-size units in offset?  For ppc32/64-linux, this is
   // 4K-sized.  Assert that the page size is 4K here for safety.
   vg_assert(VKI_PAGE_SIZE == 4096);
   PRINT("sys_mmap2 ( %#lx, %lu, %lu, %lu, %lu, %lu )",
         ARG1, ARG2, ARG3, ARG4, ARG5, ARG6 );
   PRE_REG_READ6(long, "mmap2",
                 unsigned long, start, unsigned long, length,
                 unsigned long, prot,  unsigned long, flags,
                 unsigned long, fd,    unsigned long, offset);

   r = ML_(generic_PRE_sys_mmap)( tid, ARG1, ARG2, ARG3, ARG4, ARG5, 
                                       4096 * (Off64T)ARG6 );
   SET_STATUS_from_SysRes(r);
}

// XXX: lstat64/fstat64/stat64 are generic, but not necessarily
// applicable to every architecture -- I think only to 32-bit archs.
// We're going to need something like linux/core_os32.h for such
// things, eventually, I think.  --njn
PRE(sys_lstat64)
{
   PRINT("sys_lstat64 ( %#lx(%s), %#lx )", ARG1, (HChar*)ARG1, ARG2);
   PRE_REG_READ2(long, "lstat64", char *, file_name, struct stat64 *, buf);
   PRE_MEM_RASCIIZ( "lstat64(file_name)", ARG1 );
   PRE_MEM_WRITE( "lstat64(buf)", ARG2, sizeof(struct vki_stat64) );
}

POST(sys_lstat64)
{
   vg_assert(SUCCESS);
   if (RES == 0) {
      POST_MEM_WRITE( ARG2, sizeof(struct vki_stat64) );
   }
}

PRE(sys_stat64)
{
   PRINT("sys_stat64 ( %#lx(%s), %#lx )", ARG1, (HChar*)ARG1, ARG2);
   PRE_REG_READ2(long, "stat64", char *, file_name, struct stat64 *, buf);
   PRE_MEM_RASCIIZ( "stat64(file_name)", ARG1 );
   PRE_MEM_WRITE( "stat64(buf)", ARG2, sizeof(struct vki_stat64) );
}

POST(sys_stat64)
{
   POST_MEM_WRITE( ARG2, sizeof(struct vki_stat64) );
}

PRE(sys_fstatat64)
{
   PRINT("sys_fstatat64 ( %ld, %#lx(%s), %#lx )",
         SARG1, ARG2, (HChar*)ARG2, ARG3);
   PRE_REG_READ3(long, "fstatat64",
                 int, dfd, char *, file_name, struct stat64 *, buf);
   PRE_MEM_RASCIIZ( "fstatat64(file_name)", ARG2 );
   PRE_MEM_WRITE( "fstatat64(buf)", ARG3, sizeof(struct vki_stat64) );
}

POST(sys_fstatat64)
{
   POST_MEM_WRITE( ARG3, sizeof(struct vki_stat64) );
}

PRE(sys_fstat64)
{
   PRINT("sys_fstat64 ( %lu, %#lx )", ARG1, ARG2);
   PRE_REG_READ2(long, "fstat64", unsigned long, fd, struct stat64 *, buf);
   PRE_MEM_WRITE( "fstat64(buf)", ARG2, sizeof(struct vki_stat64) );
}

POST(sys_fstat64)
{
   POST_MEM_WRITE( ARG2, sizeof(struct vki_stat64) );
}

PRE(sys_sigreturn)
{
   /* See comments on PRE(sys_rt_sigreturn) in syswrap-amd64-linux.c for
     an explanation of what follows. */

   PRINT("sys_sigreturn ( )");

   vg_assert(VG_(is_valid_tid)(tid));
   vg_assert(tid >= 1 && tid < VG_N_THREADS);
   vg_assert(VG_(is_running_thread)(tid));

   /* Restore register state from frame and remove it */
   VG_(sigframe_destroy)(tid, False);

   /* Tell the driver not to update the guest state with the "result",
      and set a bogus result to keep it happy. */
   *flags |= SfNoWriteResult;
   SET_STATUS_Success(0);

   /* Check to see if any signals arose as a result of this. */
   *flags |= SfPollAfter;
}

PRE(sys_rt_sigreturn)
{
  /* See comments on PRE(sys_rt_sigreturn) in syswrap-amd64-linux.c for
      an explanation of what follows. */

   PRINT("rt_sigreturn ( )");

   vg_assert(VG_(is_valid_tid)(tid));
   vg_assert(tid >= 1 && tid < VG_N_THREADS);
   vg_assert(VG_(is_running_thread)(tid));

   /* Restore register state from frame and remove it */
   VG_(sigframe_destroy)(tid, True);

   /* Tell the driver not to update the guest state with the "result",
      and set a bogus result to keep it happy. */
   *flags |= SfNoWriteResult;
   SET_STATUS_Success(0);

   /* Check to see if any signals arose as a result of this. */
   *flags |= SfPollAfter;
}

/* NB: clone of x86-linux version, and ppc32-linux has an almost
   identical one. */
PRE(sys_sigsuspend)
{
   /* The C library interface to sigsuspend just takes a pointer to
      a signal mask but this system call has three arguments - the first
      two don't appear to be used by the kernel and are always passed as
      zero by glibc and the third is the first word of the signal mask
      so only 32 signals are supported.
     
      In fact glibc normally uses rt_sigsuspend if it is available as
      that takes a pointer to the signal mask so supports more signals.
    */
   *flags |= SfMayBlock;
   PRINT("sys_sigsuspend ( %ld, %ld, %#lx )", SARG1, SARG2, ARG3 );
   PRE_REG_READ3(int, "sigsuspend",
                 int, history0, int, history1,
                 vki_old_sigset_t, mask);
}

/* Very much ARM specific */

PRE(sys_set_tls)
{
   PRINT("set_tls (%lx)",ARG1);
   PRE_REG_READ1(long, "set_tls", unsigned long, addr);

   SET_STATUS_from_SysRes( sys_set_tls( tid, ARG1 ) );
}

PRE(sys_cacheflush)
{
   PRINT("cacheflush (%lx, %#lx, %#lx)",ARG1,ARG2,ARG3);
   PRE_REG_READ3(long, "cacheflush", void*, addrlow,void*, addrhigh,int, flags);
   VG_(discard_translations)( (Addr)ARG1,
                              ((ULong)ARG2) - ((ULong)ARG1) + 1ULL/*paranoia*/,
                              "PRE(sys_cacheflush)" );
   SET_STATUS_Success(0);
}

// ARG3 is only used for pointers into the traced process's address
// space and for offsets into the traced process's struct
// user_regs_struct. It is never a pointer into this process's memory
// space, and we should therefore not check anything it points to.
PRE(sys_ptrace)
{
   PRINT("sys_ptrace ( %ld, %ld, %#lx, %#lx )", SARG1, SARG2, ARG3, ARG4);
   PRE_REG_READ4(int, "ptrace", 
                 long, request, long, pid, long, addr, long, data);
   switch (ARG1) {
   case VKI_PTRACE_PEEKTEXT:
   case VKI_PTRACE_PEEKDATA:
   case VKI_PTRACE_PEEKUSR:
      PRE_MEM_WRITE( "ptrace(peek)", ARG4, 
		     sizeof (long));
      break;
   case VKI_PTRACE_GETREGS:
      PRE_MEM_WRITE( "ptrace(getregs)", ARG4, 
		     sizeof (struct vki_user_regs_struct));
      break;
   case VKI_PTRACE_GETFPREGS:
      PRE_MEM_WRITE( "ptrace(getfpregs)", ARG4, 
		     sizeof (struct vki_user_fp));
      break;
   case VKI_PTRACE_GETWMMXREGS:
      PRE_MEM_WRITE( "ptrace(getwmmxregs)", ARG4, 
		     VKI_IWMMXT_SIZE);
      break;
   case VKI_PTRACE_GETCRUNCHREGS:
      PRE_MEM_WRITE( "ptrace(getcrunchregs)", ARG4, 
		     VKI_CRUNCH_SIZE);
      break;
   case VKI_PTRACE_GETVFPREGS:
      PRE_MEM_WRITE( "ptrace(getvfpregs)", ARG4, 
                     sizeof (struct vki_user_vfp) );
      break;
   case VKI_PTRACE_GETHBPREGS:
      PRE_MEM_WRITE( "ptrace(gethbpregs)", ARG4, 
                     sizeof (unsigned long) );
      break;
   case VKI_PTRACE_SETREGS:
      PRE_MEM_READ( "ptrace(setregs)", ARG4, 
		     sizeof (struct vki_user_regs_struct));
      break;
   case VKI_PTRACE_SETFPREGS:
      PRE_MEM_READ( "ptrace(setfpregs)", ARG4, 
		     sizeof (struct vki_user_fp));
      break;
   case VKI_PTRACE_SETWMMXREGS:
      PRE_MEM_READ( "ptrace(setwmmxregs)", ARG4, 
		     VKI_IWMMXT_SIZE);
      break;
   case VKI_PTRACE_SETCRUNCHREGS:
      PRE_MEM_READ( "ptrace(setcrunchregs)", ARG4, 
		     VKI_CRUNCH_SIZE);
      break;
   case VKI_PTRACE_SETVFPREGS:
      PRE_MEM_READ( "ptrace(setvfpregs)", ARG4, 
                     sizeof (struct vki_user_vfp));
      break;
   case VKI_PTRACE_SETHBPREGS:
      PRE_MEM_READ( "ptrace(sethbpregs)", ARG4, sizeof(unsigned long));
      break;
   case VKI_PTRACE_GET_THREAD_AREA:
      PRE_MEM_WRITE( "ptrace(get_thread_area)", ARG4, sizeof(unsigned long));
      break;
   case VKI_PTRACE_GETEVENTMSG:
      PRE_MEM_WRITE( "ptrace(geteventmsg)", ARG4, sizeof(unsigned long));
      break;
   case VKI_PTRACE_GETSIGINFO:
      PRE_MEM_WRITE( "ptrace(getsiginfo)", ARG4, sizeof(vki_siginfo_t));
      break;
   case VKI_PTRACE_SETSIGINFO:
      PRE_MEM_READ( "ptrace(setsiginfo)", ARG4, sizeof(vki_siginfo_t));
      break;
   case VKI_PTRACE_GETREGSET:
      ML_(linux_PRE_getregset)(tid, ARG3, ARG4);
      break;
   case VKI_PTRACE_SETREGSET:
      ML_(linux_PRE_setregset)(tid, ARG3, ARG4);
      break;
   default:
      break;
   }
}

POST(sys_ptrace)
{
   switch (ARG1) {
   case VKI_PTRACE_TRACEME:
      ML_(linux_POST_traceme)(tid);
      break;
   case VKI_PTRACE_PEEKTEXT:
   case VKI_PTRACE_PEEKDATA:
   case VKI_PTRACE_PEEKUSR:
      POST_MEM_WRITE( ARG4, sizeof (long));
      break;
   case VKI_PTRACE_GETREGS:
      POST_MEM_WRITE( ARG4, sizeof (struct vki_user_regs_struct));
      break;
   case VKI_PTRACE_GETFPREGS:
      POST_MEM_WRITE( ARG4, sizeof (struct vki_user_fp));
      break;
   case VKI_PTRACE_GETWMMXREGS:
      POST_MEM_WRITE( ARG4, VKI_IWMMXT_SIZE);
      break;
   case VKI_PTRACE_GETCRUNCHREGS:
      POST_MEM_WRITE( ARG4, VKI_CRUNCH_SIZE);
      break;
   case VKI_PTRACE_GETVFPREGS:
      POST_MEM_WRITE( ARG4, sizeof(struct vki_user_vfp));
      break;
   case VKI_PTRACE_GET_THREAD_AREA:
   case VKI_PTRACE_GETHBPREGS:
   case VKI_PTRACE_GETEVENTMSG:
      POST_MEM_WRITE( ARG4, sizeof(unsigned long));
      break;
   case VKI_PTRACE_GETSIGINFO:
      /* XXX: This is a simplification. Different parts of the
       * siginfo_t are valid depending on the type of signal.
       */
      POST_MEM_WRITE( ARG4, sizeof(vki_siginfo_t));
      break;
   case VKI_PTRACE_GETREGSET:
      ML_(linux_POST_getregset)(tid, ARG3, ARG4);
      break;
   default:
      break;
   }
}

#undef PRE
#undef POST

/* ---------------------------------------------------------------------
   The arm/Linux syscall table
   ------------------------------------------------------------------ */

#if 0
#define __NR_OABI_SYSCALL_BASE 0x900000
#else
#define __NR_OABI_SYSCALL_BASE 0x0
#endif

#define PLAX_(sysno, name)    WRAPPER_ENTRY_X_(arm_linux, sysno, name) 
#define PLAXY(sysno, name)    WRAPPER_ENTRY_XY(arm_linux, sysno, name)

// This table maps from __NR_xxx syscall numbers (from
// linux/include/asm-arm/unistd.h) to the appropriate PRE/POST sys_foo()
// wrappers on arm (as per sys_call_table in linux/arch/arm/kernel/entry.S).
//
// For those syscalls not handled by Valgrind, the annotation indicate its
// arch/OS combination, eg. */* (generic), */Linux (Linux only), ?/?
// (unknown).

static SyscallTableEntry syscall_main_table[] = {
//zz    //   (restart_syscall)                             // 0
   GENX_(__NR_exit,              sys_exit),           // 1
   GENX_(__NR_fork,              sys_fork),           // 2
   GENXY(__NR_read,              sys_read),           // 3
   GENX_(__NR_write,             sys_write),          // 4

   GENXY(__NR_open,              sys_open),           // 5
   GENXY(__NR_close,             sys_close),          // 6
//   GENXY(__NR_waitpid,           sys_waitpid),        // 7
   GENXY(__NR_creat,             sys_creat),          // 8
   GENX_(__NR_link,              sys_link),           // 9

   GENX_(__NR_unlink,            sys_unlink),         // 10
   GENX_(__NR_execve,            sys_execve),         // 11
   GENX_(__NR_chdir,             sys_chdir),          // 12
   GENXY(__NR_time,              sys_time),           // 13
   GENX_(__NR_mknod,             sys_mknod),          // 14

   GENX_(__NR_chmod,             sys_chmod),          // 15
//zz    LINX_(__NR_lchown,            sys_lchown16),       // 16
//   GENX_(__NR_break,             sys_ni_syscall),     // 17
//zz    //   (__NR_oldstat,           sys_stat),           // 18 (obsolete)
   LINX_(__NR_lseek,             sys_lseek),          // 19

   GENX_(__NR_getpid,            sys_getpid),         // 20
   LINX_(__NR_mount,             sys_mount),          // 21
   LINX_(__NR_umount,            sys_oldumount),      // 22
   LINX_(__NR_setuid,            sys_setuid16),       // 23 ## P
   LINX_(__NR_getuid,            sys_getuid16),       // 24 ## P
//zz 
//zz    //   (__NR_stime,             sys_stime),          // 25 * (SVr4,SVID,X/OPEN)
   PLAXY(__NR_ptrace,            sys_ptrace),         // 26
   GENX_(__NR_alarm,             sys_alarm),          // 27
//zz    //   (__NR_oldfstat,          sys_fstat),          // 28 * L -- obsolete
   GENX_(__NR_pause,             sys_pause),          // 29

   LINX_(__NR_utime,             sys_utime),          // 30
//   GENX_(__NR_stty,              sys_ni_syscall),     // 31
//   GENX_(__NR_gtty,              sys_ni_syscall),     // 32
   GENX_(__NR_access,            sys_access),         // 33
   GENX_(__NR_nice,              sys_nice),           // 34

//   GENX_(__NR_ftime,             sys_ni_syscall),     // 35
   GENX_(__NR_sync,              sys_sync),           // 36
   GENX_(__NR_kill,              sys_kill),           // 37
   GENX_(__NR_rename,            sys_rename),         // 38
   GENX_(__NR_mkdir,             sys_mkdir),          // 39

   GENX_(__NR_rmdir,             sys_rmdir),          // 40
   GENXY(__NR_dup,               sys_dup),            // 41
   LINXY(__NR_pipe,              sys_pipe),           // 42
   GENXY(__NR_times,             sys_times),          // 43
//   GENX_(__NR_prof,              sys_ni_syscall),     // 44
//zz 
   GENX_(__NR_brk,               sys_brk),            // 45
   LINX_(__NR_setgid,            sys_setgid16),       // 46
   LINX_(__NR_getgid,            sys_getgid16),       // 47
//zz    //   (__NR_signal,            sys_signal),         // 48 */* (ANSI C)
   LINX_(__NR_geteuid,           sys_geteuid16),      // 49

   LINX_(__NR_getegid,           sys_getegid16),      // 50
   GENX_(__NR_acct,              sys_acct),           // 51
   LINX_(__NR_umount2,           sys_umount),         // 52
//   GENX_(__NR_lock,              sys_ni_syscall),     // 53
   LINXY(__NR_ioctl,             sys_ioctl),          // 54

   LINXY(__NR_fcntl,             sys_fcntl),          // 55
//   GENX_(__NR_mpx,               sys_ni_syscall),     // 56
   GENX_(__NR_setpgid,           sys_setpgid),        // 57
//   GENX_(__NR_ulimit,            sys_ni_syscall),     // 58
//zz    //   (__NR_oldolduname,       sys_olduname),       // 59 Linux -- obsolete
//zz 
   GENX_(__NR_umask,             sys_umask),          // 60
   GENX_(__NR_chroot,            sys_chroot),         // 61
//zz    //   (__NR_ustat,             sys_ustat)           // 62 SVr4 -- deprecated
   GENXY(__NR_dup2,              sys_dup2),           // 63
   GENX_(__NR_getppid,           sys_getppid),        // 64

   GENX_(__NR_getpgrp,           sys_getpgrp),        // 65
   GENX_(__NR_setsid,            sys_setsid),         // 66
   LINXY(__NR_sigaction,         sys_sigaction),      // 67
//zz    //   (__NR_sgetmask,          sys_sgetmask),       // 68 */* (ANSI C)
//zz    //   (__NR_ssetmask,          sys_ssetmask),       // 69 */* (ANSI C)
//zz 
   LINX_(__NR_setreuid,          sys_setreuid16),     // 70
   LINX_(__NR_setregid,          sys_setregid16),     // 71
   PLAX_(__NR_sigsuspend,        sys_sigsuspend),     // 72
   LINXY(__NR_sigpending,        sys_sigpending),     // 73
//zz    //   (__NR_sethostname,       sys_sethostname),    // 74 */*
//zz 
   GENX_(__NR_setrlimit,         sys_setrlimit),      // 75
   GENXY(__NR_getrlimit,         sys_old_getrlimit),  // 76
   GENXY(__NR_getrusage,         sys_getrusage),      // 77
   GENXY(__NR_gettimeofday,      sys_gettimeofday),   // 78
   GENX_(__NR_settimeofday,      sys_settimeofday),   // 79

   LINXY(__NR_getgroups,         sys_getgroups16),    // 80
   LINX_(__NR_setgroups,         sys_setgroups16),    // 81
//   PLAX_(__NR_select,            old_select),         // 82
   GENX_(__NR_symlink,           sys_symlink),        // 83
//zz    //   (__NR_oldlstat,          sys_lstat),          // 84 -- obsolete
//zz 
   GENX_(__NR_readlink,          sys_readlink),       // 85
//zz    //   (__NR_uselib,            sys_uselib),         // 86 */Linux
//zz    //   (__NR_swapon,            sys_swapon),         // 87 */Linux
//zz    //   (__NR_reboot,            sys_reboot),         // 88 */Linux
//zz    //   (__NR_readdir,           old_readdir),        // 89 -- superseded
//zz 
//   _____(__NR_mmap,              old_mmap),           // 90
   GENXY(__NR_munmap,            sys_munmap),         // 91
   GENX_(__NR_truncate,          sys_truncate),       // 92
   GENX_(__NR_ftruncate,         sys_ftruncate),      // 93
   GENX_(__NR_fchmod,            sys_fchmod),         // 94

   LINX_(__NR_fchown,            sys_fchown16),       // 95
   GENX_(__NR_getpriority,       sys_getpriority),    // 96
   GENX_(__NR_setpriority,       sys_setpriority),    // 97
//   GENX_(__NR_profil,            sys_ni_syscall),     // 98
   GENXY(__NR_statfs,            sys_statfs),         // 99

   GENXY(__NR_fstatfs,           sys_fstatfs),        // 100
//   LINX_(__NR_ioperm,            sys_ioperm),         // 101
   LINXY(__NR_socketcall,        sys_socketcall),     // 102
   LINXY(__NR_syslog,            sys_syslog),         // 103
   GENXY(__NR_setitimer,         sys_setitimer),      // 104

   GENXY(__NR_getitimer,         sys_getitimer),      // 105
   GENXY(__NR_stat,              sys_newstat),        // 106
   GENXY(__NR_lstat,             sys_newlstat),       // 107
   GENXY(__NR_fstat,             sys_newfstat),       // 108
//zz    //   (__NR_olduname,          sys_uname),          // 109 -- obsolete
//zz 
//   GENX_(__NR_iopl,              sys_iopl),           // 110
   LINX_(__NR_vhangup,           sys_vhangup),        // 111
//   GENX_(__NR_idle,              sys_ni_syscall),     // 112
// PLAXY(__NR_vm86old,           sys_vm86old),        // 113 __NR_syscall... weird
   GENXY(__NR_wait4,             sys_wait4),          // 114
//zz 
//zz    //   (__NR_swapoff,           sys_swapoff),        // 115 */Linux 
   LINXY(__NR_sysinfo,           sys_sysinfo),        // 116
//   _____(__NR_ipc,               sys_ipc),            // 117
   GENX_(__NR_fsync,             sys_fsync),          // 118
   PLAX_(__NR_sigreturn,         sys_sigreturn),      // 119 ?/Linux

   LINX_(__NR_clone,             sys_clone),          // 120
//zz    //   (__NR_setdomainname,     sys_setdomainname),  // 121 */*(?)
   GENXY(__NR_uname,             sys_newuname),       // 122
//   PLAX_(__NR_modify_ldt,        sys_modify_ldt),     // 123
//zz    LINXY(__NR_adjtimex,          sys_adjtimex),       // 124
//zz 
   GENXY(__NR_mprotect,          sys_mprotect),       // 125
   LINXY(__NR_sigprocmask,       sys_sigprocmask),    // 126
//zz    // Nb: create_module() was removed 2.4-->2.6
//   GENX_(__NR_create_module,     sys_ni_syscall),     // 127
   LINX_(__NR_init_module,       sys_init_module),    // 128
   LINX_(__NR_delete_module,     sys_delete_module),  // 129
//zz 
//zz    // Nb: get_kernel_syms() was removed 2.4-->2.6
//   GENX_(__NR_get_kernel_syms,   sys_ni_syscall),     // 130
   LINX_(__NR_quotactl,          sys_quotactl),       // 131
   GENX_(__NR_getpgid,           sys_getpgid),        // 132
   GENX_(__NR_fchdir,            sys_fchdir),         // 133
//zz    //   (__NR_bdflush,           sys_bdflush),        // 134 */Linux
//zz 
//zz    //   (__NR_sysfs,             sys_sysfs),          // 135 SVr4
   LINX_(__NR_personality,       sys_personality),    // 136
//   GENX_(__NR_afs_syscall,       sys_ni_syscall),     // 137
   LINX_(__NR_setfsuid,          sys_setfsuid16),     // 138
   LINX_(__NR_setfsgid,          sys_setfsgid16),     // 139
 
   LINXY(__NR__llseek,           sys_llseek),         // 140
   GENXY(__NR_getdents,          sys_getdents),       // 141
   GENX_(__NR__newselect,        sys_select),         // 142
   GENX_(__NR_flock,             sys_flock),          // 143
   GENX_(__NR_msync,             sys_msync),          // 144

   GENXY(__NR_readv,             sys_readv),          // 145
   GENX_(__NR_writev,            sys_writev),         // 146
   GENX_(__NR_getsid,            sys_getsid),         // 147
   GENX_(__NR_fdatasync,         sys_fdatasync),      // 148
   LINXY(__NR__sysctl,           sys_sysctl),         // 149

   GENX_(__NR_mlock,             sys_mlock),          // 150
   GENX_(__NR_munlock,           sys_munlock),        // 151
   GENX_(__NR_mlockall,          sys_mlockall),       // 152
   LINX_(__NR_munlockall,        sys_munlockall),     // 153
   LINXY(__NR_sched_setparam,    sys_sched_setparam), // 154

   LINXY(__NR_sched_getparam,         sys_sched_getparam),        // 155
   LINX_(__NR_sched_setscheduler,     sys_sched_setscheduler),    // 156
   LINX_(__NR_sched_getscheduler,     sys_sched_getscheduler),    // 157
   LINX_(__NR_sched_yield,            sys_sched_yield),           // 158
   LINX_(__NR_sched_get_priority_max, sys_sched_get_priority_max),// 159

   LINX_(__NR_sched_get_priority_min, sys_sched_get_priority_min),// 160
//zz    //LINX?(__NR_sched_rr_get_interval,  sys_sched_rr_get_interval), // 161 */*
   GENXY(__NR_nanosleep,         sys_nanosleep),      // 162
   GENX_(__NR_mremap,            sys_mremap),         // 163
   LINX_(__NR_setresuid,         sys_setresuid16),    // 164

   LINXY(__NR_getresuid,         sys_getresuid16),    // 165
//   PLAXY(__NR_vm86,              sys_vm86),           // 166 x86/Linux-only
//   GENX_(__NR_query_module,      sys_ni_syscall),     // 167
   GENXY(__NR_poll,              sys_poll),           // 168
//zz    //   (__NR_nfsservctl,        sys_nfsservctl),     // 169 */Linux
//zz 
   LINX_(__NR_setresgid,         sys_setresgid16),    // 170
   LINXY(__NR_getresgid,         sys_getresgid16),    // 171
   LINXY(__NR_prctl,             sys_prctl),          // 172
   PLAX_(__NR_rt_sigreturn,      sys_rt_sigreturn),   // 173 
   LINXY(__NR_rt_sigaction,      sys_rt_sigaction),   // 174

   LINXY(__NR_rt_sigprocmask,    sys_rt_sigprocmask), // 175
   LINXY(__NR_rt_sigpending,     sys_rt_sigpending),  // 176
   LINXY(__NR_rt_sigtimedwait,   sys_rt_sigtimedwait),// 177
   LINXY(__NR_rt_sigqueueinfo,   sys_rt_sigqueueinfo),// 178
   LINX_(__NR_rt_sigsuspend,     sys_rt_sigsuspend),  // 179

   GENXY(__NR_pread64,           sys_pread64),        // 180
   GENX_(__NR_pwrite64,          sys_pwrite64),       // 181
   LINX_(__NR_chown,             sys_chown16),        // 182
   GENXY(__NR_getcwd,            sys_getcwd),         // 183
   LINXY(__NR_capget,            sys_capget),         // 184

   LINX_(__NR_capset,            sys_capset),         // 185
   GENXY(__NR_sigaltstack,       sys_sigaltstack),    // 186
   LINXY(__NR_sendfile,          sys_sendfile),       // 187
//   GENXY(__NR_getpmsg,           sys_getpmsg),        // 188
//   GENX_(__NR_putpmsg,           sys_putpmsg),        // 189

   // Nb: we treat vfork as fork
   GENX_(__NR_vfork,             sys_fork),           // 190
   GENXY(__NR_ugetrlimit,        sys_getrlimit),      // 191
   PLAX_(__NR_mmap2,             sys_mmap2),          // 192
   GENX_(__NR_truncate64,        sys_truncate64),     // 193
   GENX_(__NR_ftruncate64,       sys_ftruncate64),    // 194
   
   PLAXY(__NR_stat64,            sys_stat64),         // 195
   PLAXY(__NR_lstat64,           sys_lstat64),        // 196
   PLAXY(__NR_fstat64,           sys_fstat64),        // 197
   GENX_(__NR_lchown32,          sys_lchown),         // 198
   GENX_(__NR_getuid32,          sys_getuid),         // 199

   GENX_(__NR_getgid32,          sys_getgid),         // 200
   GENX_(__NR_geteuid32,         sys_geteuid),        // 201
   GENX_(__NR_getegid32,         sys_getegid),        // 202
   GENX_(__NR_setreuid32,        sys_setreuid),       // 203
   GENX_(__NR_setregid32,        sys_setregid),       // 204

   GENXY(__NR_getgroups32,       sys_getgroups),      // 205
   GENX_(__NR_setgroups32,       sys_setgroups),      // 206
   GENX_(__NR_fchown32,          sys_fchown),         // 207
   LINX_(__NR_setresuid32,       sys_setresuid),      // 208
   LINXY(__NR_getresuid32,       sys_getresuid),      // 209

   LINX_(__NR_setresgid32,       sys_setresgid),      // 210
   LINXY(__NR_getresgid32,       sys_getresgid),      // 211
   GENX_(__NR_chown32,           sys_chown),          // 212
   GENX_(__NR_setuid32,          sys_setuid),         // 213
   GENX_(__NR_setgid32,          sys_setgid),         // 214

   LINX_(__NR_setfsuid32,        sys_setfsuid),       // 215
   LINX_(__NR_setfsgid32,        sys_setfsgid),       // 216
   LINX_(__NR_pivot_root,        sys_pivot_root),     // 217
   GENXY(__NR_mincore,           sys_mincore),        // 218
   GENX_(__NR_madvise,           sys_madvise),        // 219

   GENXY(__NR_getdents64,        sys_getdents64),     // 220
   LINXY(__NR_fcntl64,           sys_fcntl64),        // 221
//   GENX_(222,                    sys_ni_syscall),     // 222
//   PLAXY(223,                    sys_syscall223),     // 223 // sys_bproc?
   LINX_(__NR_gettid,            sys_gettid),         // 224

   LINX_(__NR_readahead,         sys_readahead),      // 225 */Linux
   LINX_(__NR_setxattr,          sys_setxattr),       // 226
   LINX_(__NR_lsetxattr,         sys_lsetxattr),      // 227
   LINX_(__NR_fsetxattr,         sys_fsetxattr),      // 228
   LINXY(__NR_getxattr,          sys_getxattr),       // 229

   LINXY(__NR_lgetxattr,         sys_lgetxattr),      // 230
   LINXY(__NR_fgetxattr,         sys_fgetxattr),      // 231
   LINXY(__NR_listxattr,         sys_listxattr),      // 232
   LINXY(__NR_llistxattr,        sys_llistxattr),     // 233
   LINXY(__NR_flistxattr,        sys_flistxattr),     // 234

   LINX_(__NR_removexattr,       sys_removexattr),    // 235
   LINX_(__NR_lremovexattr,      sys_lremovexattr),   // 236
   LINX_(__NR_fremovexattr,      sys_fremovexattr),   // 237
   LINXY(__NR_tkill,             sys_tkill),          // 238 */Linux
   LINXY(__NR_sendfile64,        sys_sendfile64),     // 239

   LINXY(__NR_futex,             sys_futex),             // 240
   LINX_(__NR_sched_setaffinity, sys_sched_setaffinity), // 241
   LINXY(__NR_sched_getaffinity, sys_sched_getaffinity), // 242
//   PLAX_(__NR_set_thread_area,   sys_set_thread_area),   // 243
//   PLAX_(__NR_get_thread_area,   sys_get_thread_area),   // 244

   LINXY(__NR_io_setup,          sys_io_setup),       // 245
   LINX_(__NR_io_destroy,        sys_io_destroy),     // 246
   LINXY(__NR_io_getevents,      sys_io_getevents),   // 247
   LINX_(__NR_io_submit,         sys_io_submit),      // 248
   LINXY(__NR_io_cancel,         sys_io_cancel),      // 249

//   LINX_(__NR_fadvise64,         sys_fadvise64),      // 250 */(Linux?)
   GENX_(251,                    sys_ni_syscall),     // 251
   LINX_(__NR_exit_group,        sys_exit_group),     // 252
//   GENXY(__NR_lookup_dcookie,    sys_lookup_dcookie), // 253
   LINXY(__NR_epoll_create,      sys_epoll_create),   // 254

   LINX_(__NR_epoll_ctl,         sys_epoll_ctl),         // 255
   LINXY(__NR_epoll_wait,        sys_epoll_wait),        // 256
//zz    //   (__NR_remap_file_pages,  sys_remap_file_pages),  // 257 */Linux
   LINX_(__NR_set_tid_address,   sys_set_tid_address),   // 258
   LINXY(__NR_timer_create,      sys_timer_create),      // 259

   LINXY(__NR_timer_settime,     sys_timer_settime),  // (timer_create+1)
   LINXY(__NR_timer_gettime,     sys_timer_gettime),  // (timer_create+2)
   LINX_(__NR_timer_getoverrun,  sys_timer_getoverrun),//(timer_create+3)
   LINX_(__NR_timer_delete,      sys_timer_delete),   // (timer_create+4)
   LINX_(__NR_clock_settime,     sys_clock_settime),  // (timer_create+5)

   LINXY(__NR_clock_gettime,     sys_clock_gettime),  // (timer_create+6)
   LINXY(__NR_clock_getres,      sys_clock_getres),   // (timer_create+7)
   LINXY(__NR_clock_nanosleep,   sys_clock_nanosleep),// (timer_create+8) */*
   GENXY(__NR_statfs64,          sys_statfs64),       // 268
   GENXY(__NR_fstatfs64,         sys_fstatfs64),      // 269

   LINX_(__NR_tgkill,            sys_tgkill),         // 270 */Linux
   GENX_(__NR_utimes,            sys_utimes),         // 271
   GENX_(__NR_vserver,           sys_ni_syscall),     // 273
   LINX_(__NR_mbind,             sys_mbind),          // 274 ?/?

   LINXY(__NR_get_mempolicy,     sys_get_mempolicy),  // 275 ?/?
   LINX_(__NR_set_mempolicy,     sys_set_mempolicy),  // 276 ?/?
   LINXY(__NR_mq_open,           sys_mq_open),        // 277
   LINX_(__NR_mq_unlink,         sys_mq_unlink),      // (mq_open+1)
   LINX_(__NR_mq_timedsend,      sys_mq_timedsend),   // (mq_open+2)

   LINXY(__NR_mq_timedreceive,   sys_mq_timedreceive),// (mq_open+3)
   LINX_(__NR_mq_notify,         sys_mq_notify),      // (mq_open+4)
   LINXY(__NR_mq_getsetattr,     sys_mq_getsetattr),  // (mq_open+5)
   LINXY(__NR_waitid,            sys_waitid),         // 280

   LINXY(__NR_socket,            sys_socket),         // 281
   LINX_(__NR_bind,              sys_bind),           // 282
   LINX_(__NR_connect,           sys_connect),        // 283
   LINX_(__NR_listen,            sys_listen),         // 284
   LINXY(__NR_accept,            sys_accept),         // 285
   LINXY(__NR_getsockname,       sys_getsockname),    // 286
   LINXY(__NR_getpeername,       sys_getpeername),    // 287
   LINXY(__NR_socketpair,        sys_socketpair),     // 288
   LINX_(__NR_send,              sys_send),
   LINX_(__NR_sendto,            sys_sendto),         // 290
   LINXY(__NR_recv,              sys_recv),
   LINXY(__NR_recvfrom,          sys_recvfrom),       // 292
   LINX_(__NR_shutdown,          sys_shutdown),       // 293
   LINX_(__NR_setsockopt,        sys_setsockopt),     // 294
   LINXY(__NR_getsockopt,        sys_getsockopt),     // 295
   LINX_(__NR_sendmsg,           sys_sendmsg),        // 296
   LINXY(__NR_recvmsg,           sys_recvmsg),        // 297
   LINX_(__NR_semop,             sys_semop),          // 298 
   LINX_(__NR_semget,            sys_semget),         // 299
   LINXY(__NR_semctl,            sys_semctl),         // 300
   LINX_(__NR_msgget,            sys_msgget),         
   LINX_(__NR_msgsnd,            sys_msgsnd),          
   LINXY(__NR_msgrcv,            sys_msgrcv),         
   LINXY(__NR_msgctl,            sys_msgctl),         // 304
   LINX_(__NR_semtimedop,        sys_semtimedop),     // 312

   LINX_(__NR_add_key,           sys_add_key),        // 286
   LINX_(__NR_request_key,       sys_request_key),    // 287
   LINXY(__NR_keyctl,            sys_keyctl),         // not 288...
//   LINX_(__NR_ioprio_set,        sys_ioprio_set),     // 289

//   LINX_(__NR_ioprio_get,        sys_ioprio_get),     // 290
   LINX_(__NR_inotify_init,    sys_inotify_init),   // 291
   LINX_(__NR_inotify_add_watch, sys_inotify_add_watch), // 292
   LINX_(__NR_inotify_rm_watch,    sys_inotify_rm_watch), // 293
//   LINX_(__NR_migrate_pages,    sys_migrate_pages),    // 294

   LINXY(__NR_openat,       sys_openat),           // 295
   LINX_(__NR_mkdirat,       sys_mkdirat),          // 296
   LINX_(__NR_mknodat,       sys_mknodat),          // 297
   LINX_(__NR_fchownat,       sys_fchownat),         // 298
   LINX_(__NR_futimesat,    sys_futimesat),        // 326 on arm

   PLAXY(__NR_fstatat64,    sys_fstatat64),        // 300
   LINX_(__NR_unlinkat,       sys_unlinkat),         // 301
   LINX_(__NR_renameat,       sys_renameat),         // 302
   LINX_(__NR_linkat,       sys_linkat),           // 303
   LINX_(__NR_symlinkat,    sys_symlinkat),        // 304

   LINX_(__NR_readlinkat,    sys_readlinkat),       // 
   LINX_(__NR_fchmodat,       sys_fchmodat),         //
   LINX_(__NR_faccessat,    sys_faccessat),        //
   LINXY(__NR_shmat,             sys_shmat),       //305
   LINXY(__NR_shmdt,             sys_shmdt),          //306 
   LINX_(__NR_shmget,            sys_shmget),         //307 
   LINXY(__NR_shmctl,            sys_shmctl),         // 308 
//   LINX_(__NR_pselect6,       sys_pselect6),         //

   LINX_(__NR_unshare,       sys_unshare),          // 310
   LINX_(__NR_set_robust_list,    sys_set_robust_list),  // 311
   LINXY(__NR_get_robust_list,    sys_get_robust_list),  // 312
//   LINX_(__NR_splice,            sys_ni_syscall),       // 313
//   LINX_(__NR_sync_file_range,   sys_sync_file_range),  // 314

//   LINX_(__NR_tee,               sys_ni_syscall),       // 315
//   LINX_(__NR_vmsplice,          sys_ni_syscall),       // 316
   LINXY(__NR_move_pages,        sys_move_pages),       // 317
//   LINX_(__NR_getcpu,            sys_ni_syscall),       // 318

   LINX_(__NR_utimensat,         sys_utimensat),        // 320
   LINXY(__NR_signalfd,          sys_signalfd),         // 321
   LINXY(__NR_timerfd_create,    sys_timerfd_create),   // 322
   LINXY(__NR_eventfd,           sys_eventfd),          // 323

   LINXY(__NR_timerfd_settime,   sys_timerfd_settime),  // 325
   LINXY(__NR_timerfd_gettime,   sys_timerfd_gettime),   // 326

   ///////////////

   // JRS 2010-Jan-03: I believe that all the numbers listed 
   // in comments in the table prior to this point (eg "// 326",
   // etc) are bogus since it looks to me like they are copied
   // verbatim from syswrap-x86-linux.c and they certainly do not
   // correspond to what's in include/vki/vki-scnums-arm-linux.h.
   // From here onwards, please ensure the numbers are correct.

   LINX_(__NR_arm_fadvise64_64,  sys_fadvise64_64),     // 270 */(Linux?)

   LINXY(__NR_pselect6,          sys_pselect6),         // 335
   LINXY(__NR_ppoll,             sys_ppoll),            // 336

   LINXY(__NR_epoll_pwait,       sys_epoll_pwait),      // 346

   LINX_(__NR_fallocate,         sys_fallocate),        // 352

   LINXY(__NR_signalfd4,         sys_signalfd4),        // 355
   LINXY(__NR_eventfd2,          sys_eventfd2),         // 356
   LINXY(__NR_epoll_create1,     sys_epoll_create1),    // 357
   LINXY(__NR_dup3,              sys_dup3),             // 358
   LINXY(__NR_pipe2,             sys_pipe2),            // 359
   LINXY(__NR_inotify_init1,     sys_inotify_init1),    // 360
   LINXY(__NR_preadv,            sys_preadv),           // 361
   LINX_(__NR_pwritev,           sys_pwritev),          // 362
   LINXY(__NR_rt_tgsigqueueinfo, sys_rt_tgsigqueueinfo),// 363
   LINXY(__NR_perf_event_open,   sys_perf_event_open),  // 364
   LINXY(__NR_recvmmsg,          sys_recvmmsg),         // 365
   LINXY(__NR_accept4,           sys_accept4),          // 366
   LINXY(__NR_fanotify_init,     sys_fanotify_init),    // 367
   LINX_(__NR_fanotify_mark,     sys_fanotify_mark),    // 368
   LINXY(__NR_prlimit64,         sys_prlimit64),        // 369
   LINXY(__NR_name_to_handle_at, sys_name_to_handle_at),// 370
   LINXY(__NR_open_by_handle_at, sys_open_by_handle_at),// 371
   LINXY(__NR_clock_adjtime,     sys_clock_adjtime),    // 372
   LINX_(__NR_syncfs,            sys_syncfs),           // 373
   LINXY(__NR_sendmmsg,          sys_sendmmsg),         // 374

   LINXY(__NR_process_vm_readv,  sys_process_vm_readv), // 376
   LINX_(__NR_process_vm_writev, sys_process_vm_writev),// 377

   LINX_(__NR_renameat2,         sys_renameat2),        // 382

   LINXY(__NR_getrandom,         sys_getrandom),        // 384
   LINXY(__NR_memfd_create,      sys_memfd_create),     // 385

   LINXY(__NR_statx,             sys_statx),            // 397
};


/* These are not in the main table because there indexes are not small
   integers, but rather values close to one million.  So their
   inclusion would force the main table to be huge (about 8 MB). */

static SyscallTableEntry ste___ARM_set_tls
   = { WRAPPER_PRE_NAME(arm_linux,sys_set_tls), NULL };

static SyscallTableEntry ste___ARM_cacheflush
   = { WRAPPER_PRE_NAME(arm_linux,sys_cacheflush), NULL };

SyscallTableEntry* ML_(get_linux_syscall_entry) ( UInt sysno )
{
   const UInt syscall_main_table_size
      = sizeof(syscall_main_table) / sizeof(syscall_main_table[0]);

   /* Is it in the contiguous initial section of the table? */
   if (sysno < syscall_main_table_size) {
      SyscallTableEntry* sys = &syscall_main_table[sysno];
      if (sys->before == NULL)
         return NULL; /* no entry */
      else
         return sys;
   }

   /* Check if it's one of the out-of-line entries. */
   switch (sysno) {
      case __NR_ARM_set_tls:    return &ste___ARM_set_tls;
      case __NR_ARM_cacheflush: return &ste___ARM_cacheflush;
      default: break;
   }

   /* Can't find a wrapper */
   return NULL;
}

#endif // defined(VGP_arm_linux)

/*--------------------------------------------------------------------*/
/*--- end                                      syswrap-arm-linux.c ---*/
/*--------------------------------------------------------------------*/