forked from bminor/binutils-gdb
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy paths390-linux-tdep.c
1220 lines (1062 loc) · 36.4 KB
/
s390-linux-tdep.c
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
/* Target-dependent code for GNU/Linux on s390.
Copyright (C) 2001-2024 Free Software Foundation, Inc.
Contributed by D.J. Barrow ([email protected],[email protected])
for IBM Deutschland Entwicklung GmbH, IBM Corporation.
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 "auxv.h"
#include "elf/common.h"
#include "frame-base.h"
#include "frame-unwind.h"
#include "gdbarch.h"
#include "gdbcore.h"
#include "linux-record.h"
#include "linux-tdep.h"
#include "objfiles.h"
#include "osabi.h"
#include "regcache.h"
#include "record-full.h"
#include "regset.h"
#include "s390-tdep.h"
#include "s390-linux-tdep.h"
#include "solib-svr4.h"
#include "target.h"
#include "trad-frame.h"
#include "xml-syscall.h"
#include "features/s390-linux32v1.c"
#include "features/s390-linux32v2.c"
#include "features/s390-linux64.c"
#include "features/s390-linux64v1.c"
#include "features/s390-linux64v2.c"
#include "features/s390-te-linux64.c"
#include "features/s390-vx-linux64.c"
#include "features/s390-tevx-linux64.c"
#include "features/s390-gs-linux64.c"
#include "features/s390x-linux64v1.c"
#include "features/s390x-linux64v2.c"
#include "features/s390x-te-linux64.c"
#include "features/s390x-vx-linux64.c"
#include "features/s390x-tevx-linux64.c"
#include "features/s390x-gs-linux64.c"
#define XML_SYSCALL_FILENAME_S390 "syscalls/s390-linux.xml"
#define XML_SYSCALL_FILENAME_S390X "syscalls/s390x-linux.xml"
/* Register handling. */
/* Implement cannot_store_register gdbarch method. */
static int
s390_cannot_store_register (struct gdbarch *gdbarch, int regnum)
{
/* The last-break address is read-only. */
return regnum == S390_LAST_BREAK_REGNUM;
}
/* Implement write_pc gdbarch method. */
static void
s390_write_pc (struct regcache *regcache, CORE_ADDR pc)
{
struct gdbarch *gdbarch = regcache->arch ();
s390_gdbarch_tdep *tdep = gdbarch_tdep<s390_gdbarch_tdep> (gdbarch);
regcache_cooked_write_unsigned (regcache, tdep->pc_regnum, pc);
/* Set special SYSTEM_CALL register to 0 to prevent the kernel from
messing with the PC we just installed, if we happen to be within
an interrupted system call that the kernel wants to restart.
Note that after we return from the dummy call, the SYSTEM_CALL and
ORIG_R2 registers will be automatically restored, and the kernel
continues to restart the system call at this point. */
if (register_size (gdbarch, S390_SYSTEM_CALL_REGNUM) > 0)
regcache_cooked_write_unsigned (regcache, S390_SYSTEM_CALL_REGNUM, 0);
}
/* Maps for register sets. */
static const struct regcache_map_entry s390_gregmap[] =
{
{ 1, S390_PSWM_REGNUM },
{ 1, S390_PSWA_REGNUM },
{ 16, S390_R0_REGNUM },
{ 16, S390_A0_REGNUM },
{ 1, S390_ORIG_R2_REGNUM },
{ 0 }
};
static const struct regcache_map_entry s390_fpregmap[] =
{
{ 1, S390_FPC_REGNUM, 8 },
{ 16, S390_F0_REGNUM, 8 },
{ 0 }
};
static const struct regcache_map_entry s390_regmap_upper[] =
{
{ 16, S390_R0_UPPER_REGNUM, 4 },
{ 0 }
};
static const struct regcache_map_entry s390_regmap_last_break[] =
{
{ 1, REGCACHE_MAP_SKIP, 4 },
{ 1, S390_LAST_BREAK_REGNUM, 4 },
{ 0 }
};
static const struct regcache_map_entry s390x_regmap_last_break[] =
{
{ 1, S390_LAST_BREAK_REGNUM, 8 },
{ 0 }
};
static const struct regcache_map_entry s390_regmap_system_call[] =
{
{ 1, S390_SYSTEM_CALL_REGNUM, 4 },
{ 0 }
};
static const struct regcache_map_entry s390_regmap_tdb[] =
{
{ 1, S390_TDB_DWORD0_REGNUM, 8 },
{ 1, S390_TDB_ABORT_CODE_REGNUM, 8 },
{ 1, S390_TDB_CONFLICT_TOKEN_REGNUM, 8 },
{ 1, S390_TDB_ATIA_REGNUM, 8 },
{ 12, REGCACHE_MAP_SKIP, 8 },
{ 16, S390_TDB_R0_REGNUM, 8 },
{ 0 }
};
static const struct regcache_map_entry s390_regmap_vxrs_low[] =
{
{ 16, S390_V0_LOWER_REGNUM, 8 },
{ 0 }
};
static const struct regcache_map_entry s390_regmap_vxrs_high[] =
{
{ 16, S390_V16_REGNUM, 16 },
{ 0 }
};
static const struct regcache_map_entry s390_regmap_gs[] =
{
{ 1, REGCACHE_MAP_SKIP, 8 },
{ 1, S390_GSD_REGNUM, 8 },
{ 1, S390_GSSM_REGNUM, 8 },
{ 1, S390_GSEPLA_REGNUM, 8 },
{ 0 }
};
static const struct regcache_map_entry s390_regmap_gsbc[] =
{
{ 1, REGCACHE_MAP_SKIP, 8 },
{ 1, S390_BC_GSD_REGNUM, 8 },
{ 1, S390_BC_GSSM_REGNUM, 8 },
{ 1, S390_BC_GSEPLA_REGNUM, 8 },
{ 0 }
};
/* Supply the TDB regset. Like regcache_supply_regset, but invalidate
the TDB registers unless the TDB format field is valid. */
static void
s390_supply_tdb_regset (const struct regset *regset, struct regcache *regcache,
int regnum, const void *regs, size_t len)
{
ULONGEST tdw;
enum register_status ret;
regcache_supply_regset (regset, regcache, regnum, regs, len);
ret = regcache_cooked_read_unsigned (regcache, S390_TDB_DWORD0_REGNUM, &tdw);
if (ret != REG_VALID || (tdw >> 56) != 1)
regcache_supply_regset (regset, regcache, regnum, NULL, len);
}
const struct regset s390_gregset = {
s390_gregmap,
regcache_supply_regset,
regcache_collect_regset
};
const struct regset s390_fpregset = {
s390_fpregmap,
regcache_supply_regset,
regcache_collect_regset
};
static const struct regset s390_upper_regset = {
s390_regmap_upper,
regcache_supply_regset,
regcache_collect_regset
};
const struct regset s390_last_break_regset = {
s390_regmap_last_break,
regcache_supply_regset,
regcache_collect_regset
};
const struct regset s390x_last_break_regset = {
s390x_regmap_last_break,
regcache_supply_regset,
regcache_collect_regset
};
const struct regset s390_system_call_regset = {
s390_regmap_system_call,
regcache_supply_regset,
regcache_collect_regset
};
const struct regset s390_tdb_regset = {
s390_regmap_tdb,
s390_supply_tdb_regset,
regcache_collect_regset
};
const struct regset s390_vxrs_low_regset = {
s390_regmap_vxrs_low,
regcache_supply_regset,
regcache_collect_regset
};
const struct regset s390_vxrs_high_regset = {
s390_regmap_vxrs_high,
regcache_supply_regset,
regcache_collect_regset
};
const struct regset s390_gs_regset = {
s390_regmap_gs,
regcache_supply_regset,
regcache_collect_regset
};
const struct regset s390_gsbc_regset = {
s390_regmap_gsbc,
regcache_supply_regset,
regcache_collect_regset
};
/* Iterate over supported core file register note sections. */
static void
s390_iterate_over_regset_sections (struct gdbarch *gdbarch,
iterate_over_regset_sections_cb *cb,
void *cb_data,
const struct regcache *regcache)
{
s390_gdbarch_tdep *tdep = gdbarch_tdep<s390_gdbarch_tdep> (gdbarch);
const int gregset_size = (tdep->abi == ABI_LINUX_S390 ?
s390_sizeof_gregset : s390x_sizeof_gregset);
cb (".reg", gregset_size, gregset_size, &s390_gregset, NULL, cb_data);
cb (".reg2", s390_sizeof_fpregset, s390_sizeof_fpregset, &s390_fpregset, NULL,
cb_data);
if (tdep->abi == ABI_LINUX_S390 && tdep->gpr_full_regnum != -1)
cb (".reg-s390-high-gprs", 16 * 4, 16 * 4, &s390_upper_regset,
"s390 GPR upper halves", cb_data);
if (tdep->have_linux_v1)
cb (".reg-s390-last-break", 8, 8,
(gdbarch_ptr_bit (gdbarch) == 32
? &s390_last_break_regset : &s390x_last_break_regset),
"s390 last-break address", cb_data);
if (tdep->have_linux_v2)
cb (".reg-s390-system-call", 4, 4, &s390_system_call_regset,
"s390 system-call", cb_data);
/* If regcache is set, we are in "write" (gcore) mode. In this
case, don't iterate over the TDB unless its registers are
available. */
if (tdep->have_tdb
&& (regcache == NULL
|| (REG_VALID
== regcache->get_register_status (S390_TDB_DWORD0_REGNUM))))
cb (".reg-s390-tdb", s390_sizeof_tdbregset, s390_sizeof_tdbregset,
&s390_tdb_regset, "s390 TDB", cb_data);
if (tdep->v0_full_regnum != -1)
{
cb (".reg-s390-vxrs-low", 16 * 8, 16 * 8, &s390_vxrs_low_regset,
"s390 vector registers 0-15 lower half", cb_data);
cb (".reg-s390-vxrs-high", 16 * 16, 16 * 16, &s390_vxrs_high_regset,
"s390 vector registers 16-31", cb_data);
}
/* Iterate over the guarded-storage regsets if in "read" mode, or if
their registers are available. */
if (tdep->have_gs)
{
if (regcache == NULL
|| REG_VALID == regcache->get_register_status (S390_GSD_REGNUM))
cb (".reg-s390-gs-cb", 4 * 8, 4 * 8, &s390_gs_regset,
"s390 guarded-storage registers", cb_data);
if (regcache == NULL
|| REG_VALID == regcache->get_register_status (S390_BC_GSD_REGNUM))
cb (".reg-s390-gs-bc", 4 * 8, 4 * 8, &s390_gsbc_regset,
"s390 guarded-storage broadcast control", cb_data);
}
}
/* Implement core_read_description gdbarch method. */
static const struct target_desc *
s390_core_read_description (struct gdbarch *gdbarch,
struct target_ops *target, bfd *abfd)
{
asection *section = bfd_get_section_by_name (abfd, ".reg");
std::optional<gdb::byte_vector> auxv = target_read_auxv_raw (target);
CORE_ADDR hwcap = linux_get_hwcap (auxv, target, gdbarch);
bool high_gprs, v1, v2, te, vx, gs;
if (!section)
return NULL;
high_gprs = (bfd_get_section_by_name (abfd, ".reg-s390-high-gprs")
!= NULL);
v1 = (bfd_get_section_by_name (abfd, ".reg-s390-last-break") != NULL);
v2 = (bfd_get_section_by_name (abfd, ".reg-s390-system-call") != NULL);
vx = (hwcap & HWCAP_S390_VX);
te = (hwcap & HWCAP_S390_TE);
gs = (hwcap & HWCAP_S390_GS);
switch (bfd_section_size (section))
{
case s390_sizeof_gregset:
if (high_gprs)
return (gs ? tdesc_s390_gs_linux64 :
te && vx ? tdesc_s390_tevx_linux64 :
vx ? tdesc_s390_vx_linux64 :
te ? tdesc_s390_te_linux64 :
v2 ? tdesc_s390_linux64v2 :
v1 ? tdesc_s390_linux64v1 : tdesc_s390_linux64);
else
return (v2 ? tdesc_s390_linux32v2 :
v1 ? tdesc_s390_linux32v1 : tdesc_s390_linux32);
case s390x_sizeof_gregset:
return (gs ? tdesc_s390x_gs_linux64 :
te && vx ? tdesc_s390x_tevx_linux64 :
vx ? tdesc_s390x_vx_linux64 :
te ? tdesc_s390x_te_linux64 :
v2 ? tdesc_s390x_linux64v2 :
v1 ? tdesc_s390x_linux64v1 : tdesc_s390x_linux64);
default:
return NULL;
}
}
/* Frame unwinding. */
/* Signal trampoline stack frames. */
struct s390_sigtramp_unwind_cache {
CORE_ADDR frame_base;
trad_frame_saved_reg *saved_regs;
};
/* Unwind THIS_FRAME and return the corresponding unwind cache for
s390_sigtramp_frame_unwind. */
static struct s390_sigtramp_unwind_cache *
s390_sigtramp_frame_unwind_cache (const frame_info_ptr &this_frame,
void **this_prologue_cache)
{
struct gdbarch *gdbarch = get_frame_arch (this_frame);
s390_gdbarch_tdep *tdep = gdbarch_tdep<s390_gdbarch_tdep> (gdbarch);
int word_size = gdbarch_ptr_bit (gdbarch) / 8;
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
struct s390_sigtramp_unwind_cache *info;
ULONGEST this_sp, prev_sp;
CORE_ADDR next_ra, next_cfa, sigreg_ptr, sigreg_high_off;
int i;
if (*this_prologue_cache)
return (struct s390_sigtramp_unwind_cache *) *this_prologue_cache;
info = FRAME_OBSTACK_ZALLOC (struct s390_sigtramp_unwind_cache);
*this_prologue_cache = info;
info->saved_regs = trad_frame_alloc_saved_regs (this_frame);
this_sp = get_frame_register_unsigned (this_frame, S390_SP_REGNUM);
next_ra = get_frame_pc (this_frame);
next_cfa = this_sp + 16*word_size + 32;
/* New-style RT frame:
retcode + alignment (8 bytes)
siginfo (128 bytes)
ucontext (contains sigregs at offset 5 words). */
if (next_ra == next_cfa)
{
sigreg_ptr = next_cfa + 8 + 128 + align_up (5*word_size, 8);
/* sigregs are followed by uc_sigmask (8 bytes), then by the
upper GPR halves if present. */
sigreg_high_off = 8;
}
/* Old-style RT frame and all non-RT frames:
old signal mask (8 bytes)
pointer to sigregs. */
else
{
sigreg_ptr = read_memory_unsigned_integer (next_cfa + 8,
word_size, byte_order);
/* sigregs are followed by signo (4 bytes), then by the
upper GPR halves if present. */
sigreg_high_off = 4;
}
/* The sigregs structure looks like this:
long psw_mask;
long psw_addr;
long gprs[16];
int acrs[16];
int fpc;
int __pad;
double fprs[16]; */
/* PSW mask and address. */
info->saved_regs[S390_PSWM_REGNUM].set_addr (sigreg_ptr);
sigreg_ptr += word_size;
info->saved_regs[S390_PSWA_REGNUM].set_addr (sigreg_ptr);
sigreg_ptr += word_size;
/* Then the GPRs. */
for (i = 0; i < 16; i++)
{
info->saved_regs[S390_R0_REGNUM + i].set_addr (sigreg_ptr);
sigreg_ptr += word_size;
}
/* Then the ACRs. */
for (i = 0; i < 16; i++)
{
info->saved_regs[S390_A0_REGNUM + i].set_addr (sigreg_ptr);
sigreg_ptr += 4;
}
/* The floating-point control word. */
info->saved_regs[S390_FPC_REGNUM].set_addr (sigreg_ptr);
sigreg_ptr += 8;
/* And finally the FPRs. */
for (i = 0; i < 16; i++)
{
info->saved_regs[S390_F0_REGNUM + i].set_addr (sigreg_ptr);
sigreg_ptr += 8;
}
/* If we have them, the GPR upper halves are appended at the end. */
sigreg_ptr += sigreg_high_off;
if (tdep->gpr_full_regnum != -1)
for (i = 0; i < 16; i++)
{
info->saved_regs[S390_R0_UPPER_REGNUM + i].set_addr (sigreg_ptr);
sigreg_ptr += 4;
}
/* Restore the previous frame's SP. */
prev_sp = read_memory_unsigned_integer (
info->saved_regs[S390_SP_REGNUM].addr (),
word_size, byte_order);
/* Determine our frame base. */
info->frame_base = prev_sp + 16*word_size + 32;
return info;
}
/* Implement this_id frame_unwind method for s390_sigtramp_frame_unwind. */
static void
s390_sigtramp_frame_this_id (const frame_info_ptr &this_frame,
void **this_prologue_cache,
struct frame_id *this_id)
{
struct s390_sigtramp_unwind_cache *info
= s390_sigtramp_frame_unwind_cache (this_frame, this_prologue_cache);
*this_id = frame_id_build (info->frame_base, get_frame_pc (this_frame));
}
/* Implement prev_register frame_unwind method for sigtramp frames. */
static struct value *
s390_sigtramp_frame_prev_register (const frame_info_ptr &this_frame,
void **this_prologue_cache, int regnum)
{
struct s390_sigtramp_unwind_cache *info
= s390_sigtramp_frame_unwind_cache (this_frame, this_prologue_cache);
return s390_trad_frame_prev_register (this_frame, info->saved_regs, regnum);
}
/* Implement sniffer frame_unwind method for sigtramp frames. */
static int
s390_sigtramp_frame_sniffer (const struct frame_unwind *self,
const frame_info_ptr &this_frame,
void **this_prologue_cache)
{
CORE_ADDR pc = get_frame_pc (this_frame);
bfd_byte sigreturn[2];
if (target_read_memory (pc, sigreturn, 2))
return 0;
if (sigreturn[0] != op_svc)
return 0;
if (sigreturn[1] != 119 /* sigreturn */
&& sigreturn[1] != 173 /* rt_sigreturn */)
return 0;
return 1;
}
/* S390 sigtramp frame unwinder. */
static const struct frame_unwind_legacy s390_sigtramp_frame_unwind (
"s390 linux sigtramp",
SIGTRAMP_FRAME,
FRAME_UNWIND_ARCH,
default_frame_unwind_stop_reason,
s390_sigtramp_frame_this_id,
s390_sigtramp_frame_prev_register,
NULL,
s390_sigtramp_frame_sniffer
);
/* Syscall handling. */
/* Retrieve the syscall number at a ptrace syscall-stop. Return -1
upon error. */
static LONGEST
s390_linux_get_syscall_number (struct gdbarch *gdbarch,
thread_info *thread)
{
struct regcache *regs = get_thread_regcache (thread);
s390_gdbarch_tdep *tdep = gdbarch_tdep<s390_gdbarch_tdep> (gdbarch);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
ULONGEST pc;
ULONGEST svc_number = -1;
unsigned opcode;
/* Assume that the PC points after the 2-byte SVC instruction. We
don't currently support SVC via EXECUTE. */
regcache_cooked_read_unsigned (regs, tdep->pc_regnum, &pc);
pc -= 2;
ULONGEST val;
if (!safe_read_memory_unsigned_integer ((CORE_ADDR) pc, 1, byte_order,
&val))
return -1;
opcode = val;
if (opcode != op_svc)
return -1;
if (!safe_read_memory_unsigned_integer ((CORE_ADDR) pc + 1, 1, byte_order,
&val))
return -1;
svc_number = val;
if (svc_number == 0)
regcache_cooked_read_unsigned (regs, S390_R1_REGNUM, &svc_number);
return svc_number;
}
/* Process record-replay */
static struct linux_record_tdep s390_linux_record_tdep;
static struct linux_record_tdep s390x_linux_record_tdep;
/* Record all registers but PC register for process-record. */
static int
s390_all_but_pc_registers_record (struct regcache *regcache)
{
struct gdbarch *gdbarch = regcache->arch ();
s390_gdbarch_tdep *tdep = gdbarch_tdep<s390_gdbarch_tdep> (gdbarch);
int i;
for (i = 0; i < 16; i++)
{
if (record_full_arch_list_add_reg (regcache, S390_R0_REGNUM + i))
return -1;
if (record_full_arch_list_add_reg (regcache, S390_A0_REGNUM + i))
return -1;
if (record_full_arch_list_add_reg (regcache, S390_F0_REGNUM + i))
return -1;
if (tdep->gpr_full_regnum != -1)
if (record_full_arch_list_add_reg (regcache, S390_R0_UPPER_REGNUM + i))
return -1;
if (tdep->v0_full_regnum != -1)
{
if (record_full_arch_list_add_reg (regcache, S390_V0_LOWER_REGNUM + i))
return -1;
if (record_full_arch_list_add_reg (regcache, S390_V16_REGNUM + i))
return -1;
}
}
if (record_full_arch_list_add_reg (regcache, S390_PSWM_REGNUM))
return -1;
if (record_full_arch_list_add_reg (regcache, S390_FPC_REGNUM))
return -1;
return 0;
}
/* Canonicalize system call SYSCALL belonging to ABI. Helper for
s390_linux_syscall_record. */
static enum gdb_syscall
s390_canonicalize_syscall (int syscall, enum s390_abi_kind abi)
{
switch (syscall)
{
/* s390 syscall numbers < 222 are mostly the same as x86, so just list
the exceptions. */
case 0:
return gdb_sys_no_syscall;
case 7:
return gdb_sys_restart_syscall;
/* These syscalls work only on 31-bit. */
case 13: /* time */
case 16: /* lchown[16] */
case 23: /* setuid[16] */
case 24: /* getuid[16] */
case 25: /* stime */
case 46: /* setgid[16] */
case 47: /* getgid[16] */
case 49: /* seteuid[16] */
case 50: /* getegid[16] */
case 70: /* setreuid[16] */
case 71: /* setregid[16] */
case 76: /* [old_]getrlimit */
case 80: /* getgroups[16] */
case 81: /* setgroups[16] */
case 95: /* fchown[16] */
case 101: /* ioperm */
case 138: /* setfsuid[16] */
case 139: /* setfsgid[16] */
case 140: /* _llseek */
case 164: /* setresuid[16] */
case 165: /* getresuid[16] */
case 170: /* setresgid[16] */
case 171: /* getresgid[16] */
case 182: /* chown[16] */
case 192: /* mmap2 */
case 193: /* truncate64 */
case 194: /* ftruncate64 */
case 195: /* stat64 */
case 196: /* lstat64 */
case 197: /* fstat64 */
case 221: /* fcntl64 */
if (abi == ABI_LINUX_S390)
return (enum gdb_syscall) syscall;
return gdb_sys_no_syscall;
/* These syscalls don't exist on s390. */
case 17: /* break */
case 18: /* oldstat */
case 28: /* oldfstat */
case 31: /* stty */
case 32: /* gtty */
case 35: /* ftime */
case 44: /* prof */
case 53: /* lock */
case 56: /* mpx */
case 58: /* ulimit */
case 59: /* oldolduname */
case 68: /* sgetmask */
case 69: /* ssetmask */
case 82: /* [old_]select */
case 84: /* oldlstat */
case 98: /* profil */
case 109: /* olduname */
case 113: /* vm86old */
case 123: /* modify_ldt */
case 166: /* vm86 */
return gdb_sys_no_syscall;
case 110:
return gdb_sys_lookup_dcookie;
/* Here come the differences. */
case 222:
return gdb_sys_readahead;
case 223:
if (abi == ABI_LINUX_S390)
return gdb_sys_sendfile64;
return gdb_sys_no_syscall;
/* 224-235 handled below */
case 236:
return gdb_sys_gettid;
case 237:
return gdb_sys_tkill;
case 238:
return gdb_sys_futex;
case 239:
return gdb_sys_sched_setaffinity;
case 240:
return gdb_sys_sched_getaffinity;
case 241:
return gdb_sys_tgkill;
/* 242 reserved */
case 243:
return gdb_sys_io_setup;
case 244:
return gdb_sys_io_destroy;
case 245:
return gdb_sys_io_getevents;
case 246:
return gdb_sys_io_submit;
case 247:
return gdb_sys_io_cancel;
case 248:
return gdb_sys_exit_group;
case 249:
return gdb_sys_epoll_create;
case 250:
return gdb_sys_epoll_ctl;
case 251:
return gdb_sys_epoll_wait;
case 252:
return gdb_sys_set_tid_address;
case 253:
return gdb_sys_fadvise64;
/* 254-262 handled below */
/* 263 reserved */
case 264:
if (abi == ABI_LINUX_S390)
return gdb_sys_fadvise64_64;
return gdb_sys_no_syscall;
case 265:
return gdb_sys_statfs64;
case 266:
return gdb_sys_fstatfs64;
case 267:
return gdb_sys_remap_file_pages;
/* 268-270 reserved */
/* 271-277 handled below */
case 278:
return gdb_sys_add_key;
case 279:
return gdb_sys_request_key;
case 280:
return gdb_sys_keyctl;
case 281:
return gdb_sys_waitid;
/* 282-312 handled below */
case 293:
if (abi == ABI_LINUX_S390)
return gdb_sys_fstatat64;
return gdb_sys_newfstatat;
/* 313+ not yet supported */
default:
{
int ret;
/* Most "old" syscalls copied from i386. */
if (syscall <= 221)
ret = syscall;
/* xattr syscalls. */
else if (syscall >= 224 && syscall <= 235)
ret = syscall + 2;
/* timer syscalls. */
else if (syscall >= 254 && syscall <= 262)
ret = syscall + 5;
/* mq_* and kexec_load */
else if (syscall >= 271 && syscall <= 277)
ret = syscall + 6;
/* ioprio_set .. epoll_pwait */
else if (syscall >= 282 && syscall <= 312)
ret = syscall + 7;
else if (syscall == 349)
ret = gdb_sys_getrandom;
else
ret = gdb_sys_no_syscall;
return (enum gdb_syscall) ret;
}
}
}
/* Record a system call. Returns 0 on success, -1 otherwise.
Helper function for s390_process_record. */
static int
s390_linux_syscall_record (struct regcache *regcache, LONGEST syscall_native)
{
struct gdbarch *gdbarch = regcache->arch ();
s390_gdbarch_tdep *tdep = gdbarch_tdep<s390_gdbarch_tdep> (gdbarch);
int ret;
enum gdb_syscall syscall_gdb;
/* On s390, syscall number can be passed either as immediate field of svc
instruction, or in %r1 (with svc 0). */
if (syscall_native == 0)
regcache_raw_read_signed (regcache, S390_R1_REGNUM, &syscall_native);
syscall_gdb = s390_canonicalize_syscall (syscall_native, tdep->abi);
if (syscall_gdb < 0)
{
gdb_printf (gdb_stderr,
_("Process record and replay target doesn't "
"support syscall number %s\n"),
plongest (syscall_native));
return -1;
}
if (syscall_gdb == gdb_sys_sigreturn
|| syscall_gdb == gdb_sys_rt_sigreturn)
{
if (s390_all_but_pc_registers_record (regcache))
return -1;
return 0;
}
if (tdep->abi == ABI_LINUX_ZSERIES)
ret = record_linux_system_call (syscall_gdb, regcache,
&s390x_linux_record_tdep);
else
ret = record_linux_system_call (syscall_gdb, regcache,
&s390_linux_record_tdep);
if (ret)
return ret;
/* Record the return value of the system call. */
if (record_full_arch_list_add_reg (regcache, S390_R2_REGNUM))
return -1;
return 0;
}
/* Implement process_record_signal gdbarch method. */
static int
s390_linux_record_signal (struct gdbarch *gdbarch, struct regcache *regcache,
enum gdb_signal signal)
{
s390_gdbarch_tdep *tdep = gdbarch_tdep<s390_gdbarch_tdep> (gdbarch);
/* There are two kinds of signal frames on s390. rt_sigframe is always
the larger one, so don't even bother with sigframe. */
const int sizeof_rt_sigframe = (tdep->abi == ABI_LINUX_ZSERIES ?
160 + 8 + 128 + 1024 : 96 + 8 + 128 + 1000);
ULONGEST sp;
int i;
for (i = 0; i < 16; i++)
{
if (record_full_arch_list_add_reg (regcache, S390_R0_REGNUM + i))
return -1;
if (tdep->gpr_full_regnum != -1)
if (record_full_arch_list_add_reg (regcache, S390_R0_UPPER_REGNUM + i))
return -1;
}
if (record_full_arch_list_add_reg (regcache, S390_PSWA_REGNUM))
return -1;
if (record_full_arch_list_add_reg (regcache, S390_PSWM_REGNUM))
return -1;
/* Record the change in the stack.
frame-size = sizeof (struct rt_sigframe) + SIGNAL_FRAMESIZE */
regcache_raw_read_unsigned (regcache, S390_SP_REGNUM, &sp);
sp -= sizeof_rt_sigframe;
if (record_full_arch_list_add_mem (sp, sizeof_rt_sigframe))
return -1;
if (record_full_arch_list_add_end ())
return -1;
return 0;
}
/* Initialize linux_record_tdep if not initialized yet. */
static void
s390_init_linux_record_tdep (struct linux_record_tdep *record_tdep,
enum s390_abi_kind abi)
{
/* These values are the size of the type that will be used in a system
call. They are obtained from Linux Kernel source. */
if (abi == ABI_LINUX_ZSERIES)
{
record_tdep->size_pointer = 8;
/* no _old_kernel_stat */
record_tdep->size_tms = 32;
record_tdep->size_loff_t = 8;
record_tdep->size_flock = 32;
record_tdep->size_ustat = 32;
record_tdep->size_old_sigaction = 32;
record_tdep->size_old_sigset_t = 8;
record_tdep->size_rlimit = 16;
record_tdep->size_rusage = 144;
record_tdep->size_timeval = 16;
record_tdep->size_timezone = 8;
/* old_[ug]id_t never used */
record_tdep->size_fd_set = 128;
record_tdep->size_old_dirent = 280;
record_tdep->size_statfs = 88;
record_tdep->size_statfs64 = 88;
record_tdep->size_sockaddr = 16;
record_tdep->size_int = 4;
record_tdep->size_long = 8;
record_tdep->size_ulong = 8;
record_tdep->size_msghdr = 56;
record_tdep->size_itimerval = 32;
record_tdep->size_stat = 144;
/* old_utsname unused */
record_tdep->size_sysinfo = 112;
record_tdep->size_msqid_ds = 120;
record_tdep->size_shmid_ds = 112;
record_tdep->size_new_utsname = 390;
record_tdep->size_timex = 208;
record_tdep->size_mem_dqinfo = 24;
record_tdep->size_if_dqblk = 72;
record_tdep->size_fs_quota_stat = 80;
record_tdep->size_timespec = 16;
record_tdep->size_pollfd = 8;
record_tdep->size_NFS_FHSIZE = 32;
record_tdep->size_knfsd_fh = 132;
record_tdep->size_TASK_COMM_LEN = 16;
record_tdep->size_sigaction = 32;
record_tdep->size_sigset_t = 8;
record_tdep->size_siginfo_t = 128;
record_tdep->size_cap_user_data_t = 12;
record_tdep->size_stack_t = 24;
record_tdep->size_off_t = 8;
/* stat64 unused */
record_tdep->size_gid_t = 4;
record_tdep->size_uid_t = 4;
record_tdep->size_PAGE_SIZE = 0x1000; /* 4KB */
record_tdep->size_flock64 = 32;
record_tdep->size_io_event = 32;
record_tdep->size_iocb = 64;
record_tdep->size_epoll_event = 16;
record_tdep->size_itimerspec = 32;
record_tdep->size_mq_attr = 64;
record_tdep->size_termios = 36;
record_tdep->size_termios2 = 44;
record_tdep->size_pid_t = 4;
record_tdep->size_winsize = 8;
record_tdep->size_serial_struct = 72;
record_tdep->size_serial_icounter_struct = 80;
record_tdep->size_size_t = 8;
record_tdep->size_iovec = 16;
record_tdep->size_time_t = 8;
}
else if (abi == ABI_LINUX_S390)
{
record_tdep->size_pointer = 4;
record_tdep->size__old_kernel_stat = 32;
record_tdep->size_tms = 16;
record_tdep->size_loff_t = 8;
record_tdep->size_flock = 16;
record_tdep->size_ustat = 20;
record_tdep->size_old_sigaction = 16;
record_tdep->size_old_sigset_t = 4;
record_tdep->size_rlimit = 8;
record_tdep->size_rusage = 72;
record_tdep->size_timeval = 8;
record_tdep->size_timezone = 8;
record_tdep->size_old_gid_t = 2;
record_tdep->size_old_uid_t = 2;
record_tdep->size_fd_set = 128;
record_tdep->size_old_dirent = 268;
record_tdep->size_statfs = 64;
record_tdep->size_statfs64 = 88;
record_tdep->size_sockaddr = 16;
record_tdep->size_int = 4;
record_tdep->size_long = 4;