forked from crash-utility/crash
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathriscv64.c
1485 lines (1274 loc) · 38.9 KB
/
riscv64.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
/* riscv64.c - core analysis suite
*
* Copyright (C) 2022 Alibaba Group Holding Limited.
*
* 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.
*/
#include "defs.h"
#ifdef RISCV64
#include <elf.h>
#include <math.h>
static ulong riscv64_get_page_size(void);
static int riscv64_vtop_3level_4k(ulong *pgd, ulong vaddr,
physaddr_t *paddr, int verbose);
static int riscv64_vtop_4level_4k(ulong *pgd, ulong vaddr,
physaddr_t *paddr, int verbose);
static int riscv64_vtop_5level_4k(ulong *pgd, ulong vaddr,
physaddr_t *paddr, int verbose);
static void riscv64_page_type_init(void);
static int riscv64_is_kvaddr(ulong vaddr);
static int riscv64_is_uvaddr(ulong vaddr, struct task_context *tc);
static int riscv64_uvtop(struct task_context *tc, ulong vaddr,
physaddr_t *paddr, int verbose);
static int riscv64_kvtop(struct task_context *tc, ulong kvaddr,
physaddr_t *paddr, int verbose);
static void riscv64_cmd_mach(void);
static void riscv64_stackframe_init(void);
static void riscv64_back_trace_cmd(struct bt_info *bt);
static int riscv64_get_dumpfile_stack_frame(struct bt_info *bt,
ulong *nip, ulong *ksp);
static void riscv64_get_stack_frame(struct bt_info *bt, ulong *pcp,
ulong *spp);
static int riscv64_get_frame(struct bt_info *bt, ulong *pcp,
ulong *spp);
static void riscv64_display_full_frame(struct bt_info *bt,
struct riscv64_unwind_frame *current,
struct riscv64_unwind_frame *previous);
static int riscv64_translate_pte(ulong, void *, ulonglong);
static int riscv64_init_active_task_regs(void);
static int riscv64_get_crash_notes(void);
static int riscv64_get_elf_notes(void);
static void riscv64_get_va_range(struct machine_specific *ms);
static void riscv64_get_va_bits(struct machine_specific *ms);
static void riscv64_get_struct_page_size(struct machine_specific *ms);
#define REG_FMT "%016lx"
#define SZ_2G 0x80000000
/*
* Holds registers during the crash.
*/
static struct riscv64_register *panic_task_regs;
/* from arch/riscv/include/asm/stacktrace.h */
struct stackframe {
ulong fp;
ulong ra;
};
static struct machine_specific riscv64_machine_specific = {
._page_present = (1 << 0),
._page_read = (1 << 1),
._page_write = (1 << 2),
._page_exec = (1 << 3),
._page_user = (1 << 4),
._page_global = (1 << 5),
._page_accessed = (1 << 6),
._page_dirty = (1 << 7),
._page_soft = (1 << 8),
.va_bits = 0,
.struct_page_size = 0,
};
static void
pt_level_alloc(char **lvl, char *name)
{
size_t sz = PAGESIZE();
void *pointer = malloc(sz);
if (!pointer)
error(FATAL, name);
*lvl = pointer;
}
static ulong
riscv64_get_page_size(void)
{
return memory_page_size();
}
static ulong
riscv64_vmalloc_start(void)
{
return ((ulong)VMALLOC_START);
}
/* Get the size of struct page {} */
static void riscv64_get_struct_page_size(struct machine_specific *ms)
{
char *string;
string = pc->read_vmcoreinfo("SIZE(page)");
if (string) {
ms->struct_page_size = atol(string);
free(string);
}
}
/*
* "mach" command output.
*/
static void
riscv64_display_machine_stats(void)
{
struct new_utsname *uts;
char buf[BUFSIZE];
ulong mhz;
uts = &kt->utsname;
fprintf(fp, " MACHINE TYPE: %s\n", uts->machine);
fprintf(fp, " MEMORY SIZE: %s\n", get_memory_size(buf));
fprintf(fp, " CPUS: %d\n", get_cpus_to_display());
fprintf(fp, " PROCESSOR SPEED: ");
if ((mhz = machdep->processor_speed()))
fprintf(fp, "%ld Mhz\n", mhz);
else
fprintf(fp, "(unknown)\n");
fprintf(fp, " HZ: %d\n", machdep->hz);
fprintf(fp, " PAGE SIZE: %d\n", PAGESIZE());
fprintf(fp, " KERNEL STACK SIZE: %ld\n", STACKSIZE());
}
static void
riscv64_cmd_mach(void)
{
int c;
while ((c = getopt(argcnt, args, "cmo")) != EOF) {
switch (c) {
case 'c':
case 'm':
case 'o':
option_not_supported(c);
break;
default:
argerrs++;
break;
}
}
if (argerrs)
cmd_usage(pc->curcmd, SYNOPSIS);
riscv64_display_machine_stats();
}
/*
* Accept or reject a symbol from the kernel namelist.
*/
static int
riscv64_verify_symbol(const char *name, ulong value, char type)
{
if (CRASHDEBUG(8) && name && strlen(name))
fprintf(fp, "%08lx %s\n", value, name);
if (!(machdep->flags & KSYMS_START)) {
if (STREQ(name, "_text") || STREQ(name, "_stext"))
machdep->flags |= KSYMS_START;
return (name && strlen(name) && !STRNEQ(name, "__func__.") &&
!STRNEQ(name, "__crc_"));
}
return TRUE;
}
void
riscv64_dump_machdep_table(ulong arg)
{
int others = 0;
fprintf(fp, " flags: %lx (", machdep->flags);
if (machdep->flags & KSYMS_START)
fprintf(fp, "%sKSYMS_START", others++ ? "|" : "");
fprintf(fp, ")\n");
fprintf(fp, " kvbase: %lx\n", machdep->kvbase);
fprintf(fp, " identity_map_base: %lx\n", machdep->identity_map_base);
fprintf(fp, " pagesize: %d\n", machdep->pagesize);
fprintf(fp, " pageshift: %d\n", machdep->pageshift);
fprintf(fp, " pagemask: %llx\n", machdep->pagemask);
fprintf(fp, " pageoffset: %lx\n", machdep->pageoffset);
fprintf(fp, " pgdir_shift: %ld\n", machdep->machspec->va_bits - 9);
fprintf(fp, " ptrs_per_pgd: %u\n", PTRS_PER_PGD);
fprintf(fp, " ptrs_per_pte: %d\n", PTRS_PER_PTE);
fprintf(fp, " stacksize: %ld\n", machdep->stacksize);
fprintf(fp, " hz: %d\n", machdep->hz);
fprintf(fp, " memsize: %ld (0x%lx)\n",
machdep->memsize, machdep->memsize);
fprintf(fp, " bits: %d\n", machdep->bits);
fprintf(fp, " back_trace: riscv64_back_trace_cmd()\n");
fprintf(fp, " processor_speed: riscv64_processor_speed()\n");
fprintf(fp, " uvtop: riscv64_uvtop()\n");
fprintf(fp, " kvtop: riscv64_kvtop()\n");
fprintf(fp, " get_stack_frame: riscv64_get_stack_frame()\n");
fprintf(fp, " get_stackbase: generic_get_stackbase()\n");
fprintf(fp, " get_stacktop: generic_get_stacktop()\n");
fprintf(fp, " translate_pte: riscv64_translate_pte()\n");
fprintf(fp, " memory_size: generic_memory_size()\n");
fprintf(fp, " vmalloc_start: riscv64_vmalloc_start()\n");
fprintf(fp, " is_task_addr: riscv64_is_task_addr()\n");
fprintf(fp, " verify_symbol: riscv64_verify_symbol()\n");
fprintf(fp, " dis_filter: generic_dis_filter()\n");
fprintf(fp, " dump_irq: generic_dump_irq()\n");
fprintf(fp, " show_interrupts: generic_show_interrupts()\n");
fprintf(fp, " get_irq_affinity: generic_get_irq_affinity()\n");
fprintf(fp, " cmd_mach: riscv64_cmd_mach()\n");
fprintf(fp, " get_smp_cpus: riscv64_get_smp_cpus()\n");
fprintf(fp, " is_kvaddr: riscv64_is_kvaddr()\n");
fprintf(fp, " is_uvaddr: riscv64_is_uvaddr()\n");
fprintf(fp, " verify_paddr: generic_verify_paddr()\n");
fprintf(fp, " init_kernel_pgd: NULL\n");
fprintf(fp, " value_to_symbol: generic_machdep_value_to_symbol()\n");
fprintf(fp, " line_number_hooks: NULL\n");
fprintf(fp, " last_pgd_read: %lx\n", machdep->last_pgd_read);
fprintf(fp, " last_p4d_read: %lx\n", machdep->machspec->last_p4d_read);
fprintf(fp, " last_pud_read: %lx\n", machdep->last_pud_read);
fprintf(fp, " last_pmd_read: %lx\n", machdep->last_pmd_read);
fprintf(fp, " last_ptbl_read: %lx\n", machdep->last_ptbl_read);
fprintf(fp, " pgd: %lx\n", (ulong)machdep->pgd);
fprintf(fp, " p4d: %lx\n", (ulong)machdep->machspec->p4d);
fprintf(fp, " pud: %lx\n", (ulong)machdep->pud);
fprintf(fp, " pmd: %lx\n", (ulong)machdep->pmd);
fprintf(fp, " ptbl: %lx\n", (ulong)machdep->ptbl);
fprintf(fp, " section_size_bits: %ld\n", machdep->section_size_bits);
fprintf(fp, " max_physmem_bits: %ld\n", machdep->max_physmem_bits);
fprintf(fp, " sections_per_root: %ld\n", machdep->sections_per_root);
fprintf(fp, " machspec: %lx\n", (ulong)machdep->machspec);
}
static ulong
riscv64_processor_speed(void)
{
/* TODO: */
return 0;
}
static unsigned long riscv64_get_kernel_version(void)
{
char *string;
char buf[BUFSIZE];
char *p1, *p2;
if (THIS_KERNEL_VERSION)
return THIS_KERNEL_VERSION;
string = pc->read_vmcoreinfo("OSRELEASE");
if (string) {
strcpy(buf, string);
p1 = p2 = buf;
while (*p2 != '.')
p2++;
*p2 = NULLCHAR;
kt->kernel_version[0] = atoi(p1);
p1 = ++p2;
while (*p2 != '.')
p2++;
*p2 = NULLCHAR;
kt->kernel_version[1] = atoi(p1);
p1 = ++p2;
while ((*p2 >= '0') && (*p2 <= '9'))
p2++;
*p2 = NULLCHAR;
kt->kernel_version[2] = atoi(p1);
free(string);
}
return THIS_KERNEL_VERSION;
}
static void
riscv64_get_phys_ram_base(struct machine_specific *ms)
{
unsigned long kernel_version = riscv64_get_kernel_version();
/*
* phys_ram_base is defined in Linux kernel since 5.14.
*/
if (kernel_version >= LINUX(5,14,0)) {
char *string;
if ((string = pc->read_vmcoreinfo("NUMBER(phys_ram_base)"))) {
ms->phys_base = atol(string);
free(string);
} else
error(FATAL, "cannot read phys_ram_base\n");
} else
/*
* For qemu rv64 env and hardware platform, default phys base
* may different, eg,
* hardware platform: 0x200000
* qemu rv64 env: 0x80200000
*
* But we only can set one default value, in this case, qemu
* rv64 env may can't work.
*/
ms->phys_base = 0x200000;
}
static void riscv64_get_va_bits(struct machine_specific *ms)
{
unsigned long kernel_version = riscv64_get_kernel_version();
/*
* VA_BITS is defined in Linux kernel since 5.17. So we use the
* default va bits 39 when Linux version < 5.17.
*/
if (kernel_version >= LINUX(5,17,0)) {
char *string;
if ((string = pc->read_vmcoreinfo("NUMBER(VA_BITS)"))) {
ms->va_bits = atol(string);
free(string);
}
} else
ms->va_bits = 39;
}
static void riscv64_get_va_range(struct machine_specific *ms)
{
unsigned long kernel_version = riscv64_get_kernel_version();
char *string;
if ((string = pc->read_vmcoreinfo("NUMBER(PAGE_OFFSET)"))) {
ms->page_offset = htol(string, QUIET, NULL);
free(string);
} else
goto error;
if ((string = pc->read_vmcoreinfo("NUMBER(VMALLOC_START)"))) {
ms->vmalloc_start_addr = htol(string, QUIET, NULL);
free(string);
} else
goto error;
if ((string = pc->read_vmcoreinfo("NUMBER(VMALLOC_END)"))) {
ms->vmalloc_end = htol(string, QUIET, NULL);
free(string);
} else
goto error;
if ((string = pc->read_vmcoreinfo("NUMBER(VMEMMAP_START)"))) {
ms->vmemmap_vaddr = htol(string, QUIET, NULL);
free(string);
} else
goto error;
if ((string = pc->read_vmcoreinfo("NUMBER(VMEMMAP_END)"))) {
ms->vmemmap_end = htol(string, QUIET, NULL);
free(string);
} else
goto error;
if ((string = pc->read_vmcoreinfo("NUMBER(KERNEL_LINK_ADDR)"))) {
ms->kernel_link_addr = htol(string, QUIET, NULL);
free(string);
} else
goto error;
/*
* From Linux 5.13, the kernel mapping is moved to the last 2GB
* of the address space, modules use the 2GB memory range right
* before the kernel. Before Linux 5.13, modules area is embedded
* in vmalloc area.
*
*/
if (kernel_version >= LINUX(5,13,0)) {
if ((string = pc->read_vmcoreinfo("NUMBER(MODULES_VADDR)"))) {
ms->modules_vaddr = htol(string, QUIET, NULL);
free(string);
} else
goto error;
if ((string = pc->read_vmcoreinfo("NUMBER(MODULES_END)"))) {
ms->modules_end = htol(string, QUIET, NULL);
free(string);
} else
goto error;
} else {
ms->modules_vaddr = ms->vmalloc_start_addr;
ms->modules_end = ms->vmalloc_end;
}
if (CRASHDEBUG(1)) {
fprintf(fp, "vmemmap : 0x%lx - 0x%lx\n",
ms->vmemmap_vaddr, ms->vmemmap_end);
fprintf(fp, "vmalloc : 0x%lx - 0x%lx\n",
ms->vmalloc_start_addr, ms->vmalloc_end);
fprintf(fp, "mudules : 0x%lx - 0x%lx\n",
ms->modules_vaddr, ms->modules_end);
fprintf(fp, "lowmem : 0x%lx -\n", ms->page_offset);
fprintf(fp, "kernel link addr : 0x%lx\n",
ms->kernel_link_addr);
}
return;
error:
error(FATAL, "cannot get vm layout\n");
}
static int
riscv64_is_kvaddr(ulong vaddr)
{
if (IS_VMALLOC_ADDR(vaddr))
return TRUE;
return (vaddr >= machdep->kvbase);
}
static int
riscv64_is_uvaddr(ulong vaddr, struct task_context *unused)
{
if (IS_VMALLOC_ADDR(vaddr))
return FALSE;
return (vaddr < machdep->kvbase);
}
static int
riscv64_is_task_addr(ulong task)
{
if (tt->flags & THREAD_INFO)
return IS_KVADDR(task);
return (IS_KVADDR(task) && ALIGNED_STACK_OFFSET(task) == 0);
}
static int
riscv64_get_smp_cpus(void)
{
return (get_cpus_present() > 0) ? get_cpus_present() : kt->cpus;
}
/*
* Include both vmalloc'd and module address space as VMALLOC space.
*/
int
riscv64_IS_VMALLOC_ADDR(ulong vaddr)
{
return ((vaddr >= VMALLOC_START && vaddr <= VMALLOC_END) ||
(vaddr >= VMEMMAP_VADDR && vaddr <= VMEMMAP_END) ||
(vaddr >= MODULES_VADDR && vaddr <= MODULES_END));
}
/*
* Translate a PTE, returning TRUE if the page is present.
* If a physaddr pointer is passed in, don't print anything.
*/
static int
riscv64_translate_pte(ulong pte, void *physaddr, ulonglong unused)
{
char ptebuf[BUFSIZE];
char physbuf[BUFSIZE];
char buf[BUFSIZE];
int page_present;
int len1, len2, others;
ulong paddr;
paddr = PTOB(pte >> _PAGE_PFN_SHIFT);
page_present = !!(pte & _PAGE_PRESENT);
if (physaddr) {
*(ulong *)physaddr = paddr;
return page_present;
}
sprintf(ptebuf, "%lx", pte);
len1 = MAX(strlen(ptebuf), strlen("PTE"));
fprintf(fp, "%s ", mkstring(buf, len1, CENTER | LJUST, "PTE"));
if (!page_present)
return page_present;
sprintf(physbuf, "%lx", paddr);
len2 = MAX(strlen(physbuf), strlen("PHYSICAL"));
fprintf(fp, "%s ", mkstring(buf, len2, CENTER | LJUST, "PHYSICAL"));
fprintf(fp, "FLAGS\n");
fprintf(fp, "%s %s ",
mkstring(ptebuf, len1, CENTER | RJUST, NULL),
mkstring(physbuf, len2, CENTER | RJUST, NULL));
fprintf(fp, "(");
others = 0;
#define CHECK_PAGE_FLAG(flag) \
if ((_PAGE_##flag) && (pte & _PAGE_##flag)) \
fprintf(fp, "%s" #flag, others++ ? "|" : "")
if (pte) {
CHECK_PAGE_FLAG(PRESENT);
CHECK_PAGE_FLAG(READ);
CHECK_PAGE_FLAG(WRITE);
CHECK_PAGE_FLAG(EXEC);
CHECK_PAGE_FLAG(USER);
CHECK_PAGE_FLAG(GLOBAL);
CHECK_PAGE_FLAG(ACCESSED);
CHECK_PAGE_FLAG(DIRTY);
CHECK_PAGE_FLAG(SOFT);
} else {
fprintf(fp, "no mapping");
}
fprintf(fp, ")\n");
return page_present;
}
static void
riscv64_page_type_init(void)
{
ulong va_bits = machdep->machspec->va_bits;
/*
* For RISCV64 arch, any level of PTE may be a leaf PTE,
* so in addition to 4KiB pages,
* Sv39 supports 2 MiB megapages, 1 GiB gigapages;
* Sv48 supports 2 MiB megapages, 1 GiB gigapages, 512 GiB terapages;
* Sv57 supports 2 MiB megapages, 1 GiB gigapages, 512 GiB terapages, and 256 TiB petapages.
*
* refs to riscv-privileged spec.
*
* We just support 4KiB, 2MiB, 1GiB now.
*/
switch (machdep->pagesize)
{
case 0x1000: // 4 KiB
machdep->flags |= (va_bits == 57 ? VM_L5_4K :
(va_bits == 48 ? VM_L4_4K : VM_L3_4K));
break;
case 0x200000: // 2 MiB
/* TODO: */
case 0x40000000: // 1 GiB
/* TODO: */
default:
if (machdep->pagesize)
error(FATAL, "invalid/unsupported page size: %d\n",
machdep->pagesize);
else
error(FATAL, "cannot determine page size\n");
}
}
static int
riscv64_vtop_3level_4k(ulong *pgd, ulong vaddr, physaddr_t *paddr, int verbose)
{
ulong *pgd_ptr, pgd_val;
ulong pmd_val;
ulong pte_val, pte_pfn;
ulong pt_phys;
/* PGD */
pgd_ptr = pgd + pgd_index_l3_4k(vaddr);
FILL_PGD(pgd, KVADDR, PAGESIZE());
pgd_val = ULONG(machdep->pgd + PAGEOFFSET(pgd_ptr));
if (verbose)
fprintf(fp, " PGD: %lx => %lx\n", (ulong)pgd_ptr, pgd_val);
if (!pgd_val)
goto no_page;
pgd_val &= PTE_PFN_PROT_MASK;
pt_phys = (pgd_val >> _PAGE_PFN_SHIFT) << PAGESHIFT();
/* PMD */
FILL_PMD(PAGEBASE(pt_phys), PHYSADDR, PAGESIZE());
pmd_val = ULONG(machdep->pmd + PAGEOFFSET(sizeof(pmd_t) *
pmd_index_l3_4k(vaddr)));
if (verbose)
fprintf(fp, " PMD: %016lx => %016lx\n", pt_phys, pmd_val);
if (!pmd_val)
goto no_page;
pmd_val &= PTE_PFN_PROT_MASK;
pt_phys = (pmd_val >> _PAGE_PFN_SHIFT) << PAGESHIFT();
/* PTE */
FILL_PTBL(PAGEBASE(pt_phys), PHYSADDR, PAGESIZE());
pte_val = ULONG(machdep->ptbl + PAGEOFFSET(sizeof(pte_t) *
pte_index_l3_4k(vaddr)));
if (verbose)
fprintf(fp, " PTE: %lx => %lx\n", pt_phys, pte_val);
if (!pte_val)
goto no_page;
pte_val &= PTE_PFN_PROT_MASK;
pte_pfn = pte_val >> _PAGE_PFN_SHIFT;
if (!(pte_val & _PAGE_PRESENT)) {
if (verbose) {
fprintf(fp, "\n");
riscv64_translate_pte((ulong)pte_val, 0, 0);
}
fprintf(fp, " PAGE: %016lx not present\n\n", PAGEBASE(*paddr));
return FALSE;
}
*paddr = PTOB(pte_pfn) + PAGEOFFSET(vaddr);
if (verbose) {
fprintf(fp, " PAGE: %016lx\n\n", PAGEBASE(*paddr));
riscv64_translate_pte(pte_val, 0, 0);
}
return TRUE;
no_page:
fprintf(fp, "invalid\n");
return FALSE;
}
/*
* 'bt -f' command output
* Display all stack data contained in a frame
*/
static void
riscv64_display_full_frame(struct bt_info *bt, struct riscv64_unwind_frame *current,
struct riscv64_unwind_frame *previous)
{
int i, u_idx;
ulong *up;
ulong words, addr;
char buf[BUFSIZE];
if (previous->sp < current->sp)
return;
if (!(INSTACK(previous->sp, bt) && INSTACK(current->sp, bt)))
return;
words = (previous->sp - current->sp) / sizeof(ulong) + 1;
addr = current->sp;
u_idx = (current->sp - bt->stackbase) / sizeof(ulong);
for (i = 0; i < words; i++, u_idx++) {
if (!(i & 1))
fprintf(fp, "%s %lx: ", i ? "\n" : "", addr);
up = (ulong *)(&bt->stackbuf[u_idx*sizeof(ulong)]);
fprintf(fp, "%s ", format_stack_entry(bt, buf, *up, 0));
addr += sizeof(ulong);
}
fprintf(fp, "\n");
}
static void
riscv64_stackframe_init(void)
{
long task_struct_thread = MEMBER_OFFSET("task_struct", "thread");
/* from arch/riscv/include/asm/processor.h */
long thread_reg_ra = MEMBER_OFFSET("thread_struct", "ra");
long thread_reg_sp = MEMBER_OFFSET("thread_struct", "sp");
long thread_reg_fp = MEMBER_OFFSET("thread_struct", "s");
if ((task_struct_thread == INVALID_OFFSET) ||
(thread_reg_ra == INVALID_OFFSET) ||
(thread_reg_sp == INVALID_OFFSET) ||
(thread_reg_fp == INVALID_OFFSET) )
error(FATAL,
"cannot determine thread_struct offsets\n");
ASSIGN_OFFSET(task_struct_thread_context_pc) =
task_struct_thread + thread_reg_ra;
ASSIGN_OFFSET(task_struct_thread_context_sp) =
task_struct_thread + thread_reg_sp;
ASSIGN_OFFSET(task_struct_thread_context_fp) =
task_struct_thread + thread_reg_fp;
}
static void
riscv64_dump_backtrace_entry(struct bt_info *bt, struct syment *sym,
struct riscv64_unwind_frame *current,
struct riscv64_unwind_frame *previous, int level)
{
const char *name = sym ? sym->name : "(invalid)";
struct load_module *lm;
char *name_plus_offset = NULL;
struct syment *symp;
ulong symbol_offset;
char buf[BUFSIZE];
if (bt->flags & BT_SYMBOL_OFFSET) {
symp = value_search(current->pc, &symbol_offset);
if (symp && symbol_offset)
name_plus_offset =
value_to_symstr(current->pc, buf, bt->radix);
}
fprintf(fp, "%s#%d [%016lx] %s at %016lx",
level < 10 ? " " : "",
level,
current->sp,
name_plus_offset ? name_plus_offset : name,
current->pc);
if (module_symbol(current->pc, NULL, &lm, NULL, 0))
fprintf(fp, " [%s]", lm->mod_name);
fprintf(fp, "\n");
/*
* 'bt -l', get a line number associated with a current pc address.
*/
if (bt->flags & BT_LINE_NUMBERS) {
get_line_number(current->pc, buf, FALSE);
if (strlen(buf))
fprintf(fp, " %s\n", buf);
}
/* bt -f */
if (bt->flags & BT_FULL) {
fprintf(fp, " "
"[PC: %016lx RA: %016lx SP: %016lx SIZE: %ld]\n",
current->pc,
previous->pc,
current->sp,
previous->sp - current->sp);
riscv64_display_full_frame(bt, current, previous);
}
}
/*
* Unroll a kernel stack.
*/
static void
riscv64_back_trace_cmd(struct bt_info *bt)
{
struct riscv64_unwind_frame current, previous;
struct stackframe curr_frame;
int level = 0;
if (bt->flags & BT_REGS_NOT_FOUND)
return;
current.pc = bt->instptr;
current.sp = bt->stkptr;
current.fp = bt->frameptr;
if (!INSTACK(current.sp, bt))
return;
for (;;) {
struct syment *symbol = NULL;
struct stackframe *frameptr;
ulong low, high;
ulong offset;
if (CRASHDEBUG(8))
fprintf(fp, "level %d pc %#lx sp %lx fp 0x%lx\n",
level, current.pc, current.sp, current.fp);
/* Validate frame pointer */
low = current.sp + sizeof(struct stackframe);
high = bt->stacktop;
if (current.fp < low || current.fp > high || current.fp & 0x7) {
if (CRASHDEBUG(8))
fprintf(fp, "fp 0x%lx sp 0x%lx low 0x%lx high 0x%lx\n",
current.fp, current.sp, low, high);
return;
}
symbol = value_search(current.pc, &offset);
if (!symbol)
return;
frameptr = (struct stackframe *)current.fp - 1;
if (!readmem((ulong)frameptr, KVADDR, &curr_frame,
sizeof(curr_frame), "get stack frame", RETURN_ON_ERROR))
return;
previous.pc = curr_frame.ra;
previous.fp = curr_frame.fp;
previous.sp = current.fp;
riscv64_dump_backtrace_entry(bt, symbol, ¤t, &previous, level++);
current.pc = previous.pc;
current.fp = previous.fp;
current.sp = previous.sp;
if (CRASHDEBUG(8))
fprintf(fp, "next %d pc %#lx sp %#lx fp %lx\n",
level, current.pc, current.sp, current.fp);
}
}
/*
* Get a stack frame combination of pc and ra from the most relevant spot.
*/
static void
riscv64_get_stack_frame(struct bt_info *bt, ulong *pcp, ulong *spp)
{
ulong ksp = 0, nip = 0;
int ret = 0;
if (DUMPFILE() && is_task_active(bt->task))
ret = riscv64_get_dumpfile_stack_frame(bt, &nip, &ksp);
else
ret = riscv64_get_frame(bt, &nip, &ksp);
if (!ret)
error(WARNING, "cannot determine starting stack frame for task %lx\n",
bt->task);
if (pcp)
*pcp = nip;
if (spp)
*spp = ksp;
}
/*
* Get the starting point for the active cpu in a diskdump.
*/
static int
riscv64_get_dumpfile_stack_frame(struct bt_info *bt, ulong *nip, ulong *ksp)
{
const struct machine_specific *ms = machdep->machspec;
struct riscv64_register *regs;
ulong epc, sp;
if (!ms->crash_task_regs) {
bt->flags |= BT_REGS_NOT_FOUND;
return FALSE;
}
/*
* We got registers for panic task from crash_notes. Just return them.
*/
regs = &ms->crash_task_regs[bt->tc->processor];
epc = regs->regs[RISCV64_REGS_EPC];
sp = regs->regs[RISCV64_REGS_SP];
/*
* Set stack frame ptr.
*/
bt->frameptr = regs->regs[RISCV64_REGS_FP];
if (nip)
*nip = epc;
if (ksp)
*ksp = sp;
bt->machdep = regs;
return TRUE;
}
/*
* Do the work for riscv64_get_stack_frame() for non-active tasks.
* Get SP and PC values for idle tasks.
*/
static int
riscv64_get_frame(struct bt_info *bt, ulong *pcp, ulong *spp)
{
if (!bt->tc || !(tt->flags & THREAD_INFO))
return FALSE;
if (!readmem(bt->task + OFFSET(task_struct_thread_context_pc),
KVADDR, pcp, sizeof(*pcp),
"thread_struct.ra",
RETURN_ON_ERROR))
return FALSE;
if (!readmem(bt->task + OFFSET(task_struct_thread_context_sp),
KVADDR, spp, sizeof(*spp),
"thread_struct.sp",
RETURN_ON_ERROR))
return FALSE;
if (!readmem(bt->task + OFFSET(task_struct_thread_context_fp),
KVADDR, &bt->frameptr, sizeof(bt->frameptr),
"thread_struct.fp",
RETURN_ON_ERROR))
return FALSE;
return TRUE;
}
static int
riscv64_vtop_4level_4k(ulong *pgd, ulong vaddr, physaddr_t *paddr, int verbose)
{
ulong *pgd_ptr, pgd_val;
ulong pud_val;
ulong pmd_val;
ulong pte_val, pte_pfn;
ulong pt_phys;
/* PGD */
pgd_ptr = pgd + pgd_index_l4_4k(vaddr);
FILL_PGD(pgd, KVADDR, PAGESIZE());
pgd_val = ULONG(machdep->pgd + PAGEOFFSET(pgd_ptr));
if (verbose)
fprintf(fp, " PGD: %lx => %lx\n", (ulong)pgd_ptr, pgd_val);
if (!pgd_val)
goto no_page;
pgd_val &= PTE_PFN_PROT_MASK;
pt_phys = (pgd_val >> _PAGE_PFN_SHIFT) << PAGESHIFT();
/* PUD */
FILL_PUD(PAGEBASE(pt_phys), PHYSADDR, PAGESIZE());
pud_val = ULONG(machdep->pud + PAGEOFFSET(sizeof(pud_t) *
pud_index_l4_4k(vaddr)));
if (verbose)
fprintf(fp, " PUD: %016lx => %016lx\n", pt_phys, pud_val);
if (!pud_val)
goto no_page;
pud_val &= PTE_PFN_PROT_MASK;
pt_phys = (pud_val >> _PAGE_PFN_SHIFT) << PAGESHIFT();
/* PMD */
FILL_PMD(PAGEBASE(pt_phys), PHYSADDR, PAGESIZE());
pmd_val = ULONG(machdep->pmd + PAGEOFFSET(sizeof(pmd_t) *
pmd_index_l4_4k(vaddr)));
if (verbose)
fprintf(fp, " PMD: %016lx => %016lx\n", pt_phys, pmd_val);
if (!pmd_val)
goto no_page;
pmd_val &= PTE_PFN_PROT_MASK;
pt_phys = (pmd_val >> _PAGE_PFN_SHIFT) << PAGESHIFT();
/* PTE */
FILL_PTBL(PAGEBASE(pt_phys), PHYSADDR, PAGESIZE());
pte_val = ULONG(machdep->ptbl + PAGEOFFSET(sizeof(pte_t) *
pte_index_l4_4k(vaddr)));
if (verbose)
fprintf(fp, " PTE: %lx => %lx\n", pt_phys, pte_val);
if (!pte_val)
goto no_page;
pte_val &= PTE_PFN_PROT_MASK;
pte_pfn = pte_val >> _PAGE_PFN_SHIFT;
if (!(pte_val & _PAGE_PRESENT)) {
if (verbose) {
fprintf(fp, "\n");
riscv64_translate_pte((ulong)pte_val, 0, 0);
}
fprintf(fp, " PAGE: %016lx not present\n\n", PAGEBASE(*paddr));
return FALSE;
}
*paddr = PTOB(pte_pfn) + PAGEOFFSET(vaddr);
if (verbose) {
fprintf(fp, " PAGE: %016lx\n\n", PAGEBASE(*paddr));
riscv64_translate_pte(pte_val, 0, 0);
}
return TRUE;
no_page:
fprintf(fp, "invalid\n");
return FALSE;
}
static int
riscv64_vtop_5level_4k(ulong *pgd, ulong vaddr, physaddr_t *paddr, int verbose)
{
ulong *pgd_ptr, pgd_val;
ulong p4d_val;
ulong pud_val;
ulong pmd_val;
ulong pte_val, pte_pfn;
ulong pt_phys;
/* PGD */
pgd_ptr = pgd + pgd_index_l5_4k(vaddr);
FILL_PGD(pgd, KVADDR, PAGESIZE());
pgd_val = ULONG(machdep->pgd + PAGEOFFSET(pgd_ptr));
if (verbose)
fprintf(fp, " PGD: %lx => %lx\n", (ulong)pgd_ptr, pgd_val);
if (!pgd_val)
goto no_page;
pgd_val &= PTE_PFN_PROT_MASK;
pt_phys = (pgd_val >> _PAGE_PFN_SHIFT) << PAGESHIFT();
/* P4D */
FILL_P4D(PAGEBASE(pt_phys), PHYSADDR, PAGESIZE());
p4d_val = ULONG(machdep->machspec->p4d + PAGEOFFSET(sizeof(p4d_t) *
p4d_index_l5_4k(vaddr)));
if (verbose)
fprintf(fp, " P4D: %016lx => %016lx\n", pt_phys, p4d_val);
if (!p4d_val)
goto no_page;
p4d_val &= PTE_PFN_PROT_MASK;
pt_phys = (p4d_val >> _PAGE_PFN_SHIFT) << PAGESHIFT();