forked from bminor/binutils-gdb
-
Notifications
You must be signed in to change notification settings - Fork 9
/
Copy pathctf-open.c
2036 lines (1694 loc) · 58 KB
/
ctf-open.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
/* Opening CTF files.
Copyright (C) 2019-2021 Free Software Foundation, Inc.
This file is part of libctf.
libctf 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, 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; see the file COPYING. If not see
<http://www.gnu.org/licenses/>. */
#include <ctf-impl.h>
#include <stddef.h>
#include <string.h>
#include <sys/types.h>
#include <elf.h>
#include "swap.h"
#include <bfd.h>
#include <zlib.h>
static const ctf_dmodel_t _libctf_models[] = {
{"ILP32", CTF_MODEL_ILP32, 4, 1, 2, 4, 4},
{"LP64", CTF_MODEL_LP64, 8, 1, 2, 4, 8},
{NULL, 0, 0, 0, 0, 0, 0}
};
const char _CTF_SECTION[] = ".ctf";
const char _CTF_NULLSTR[] = "";
/* Version-sensitive accessors. */
static uint32_t
get_kind_v1 (uint32_t info)
{
return (CTF_V1_INFO_KIND (info));
}
static uint32_t
get_root_v1 (uint32_t info)
{
return (CTF_V1_INFO_ISROOT (info));
}
static uint32_t
get_vlen_v1 (uint32_t info)
{
return (CTF_V1_INFO_VLEN (info));
}
static uint32_t
get_kind_v2 (uint32_t info)
{
return (CTF_V2_INFO_KIND (info));
}
static uint32_t
get_root_v2 (uint32_t info)
{
return (CTF_V2_INFO_ISROOT (info));
}
static uint32_t
get_vlen_v2 (uint32_t info)
{
return (CTF_V2_INFO_VLEN (info));
}
static inline ssize_t
get_ctt_size_common (const ctf_dict_t *fp _libctf_unused_,
const ctf_type_t *tp _libctf_unused_,
ssize_t *sizep, ssize_t *incrementp, size_t lsize,
size_t csize, size_t ctf_type_size,
size_t ctf_stype_size, size_t ctf_lsize_sent)
{
ssize_t size, increment;
if (csize == ctf_lsize_sent)
{
size = lsize;
increment = ctf_type_size;
}
else
{
size = csize;
increment = ctf_stype_size;
}
if (sizep)
*sizep = size;
if (incrementp)
*incrementp = increment;
return size;
}
static ssize_t
get_ctt_size_v1 (const ctf_dict_t *fp, const ctf_type_t *tp,
ssize_t *sizep, ssize_t *incrementp)
{
ctf_type_v1_t *t1p = (ctf_type_v1_t *) tp;
return (get_ctt_size_common (fp, tp, sizep, incrementp,
CTF_TYPE_LSIZE (t1p), t1p->ctt_size,
sizeof (ctf_type_v1_t), sizeof (ctf_stype_v1_t),
CTF_LSIZE_SENT_V1));
}
/* Return the size that a v1 will be once it is converted to v2. */
static ssize_t
get_ctt_size_v2_unconverted (const ctf_dict_t *fp, const ctf_type_t *tp,
ssize_t *sizep, ssize_t *incrementp)
{
ctf_type_v1_t *t1p = (ctf_type_v1_t *) tp;
return (get_ctt_size_common (fp, tp, sizep, incrementp,
CTF_TYPE_LSIZE (t1p), t1p->ctt_size,
sizeof (ctf_type_t), sizeof (ctf_stype_t),
CTF_LSIZE_SENT));
}
static ssize_t
get_ctt_size_v2 (const ctf_dict_t *fp, const ctf_type_t *tp,
ssize_t *sizep, ssize_t *incrementp)
{
return (get_ctt_size_common (fp, tp, sizep, incrementp,
CTF_TYPE_LSIZE (tp), tp->ctt_size,
sizeof (ctf_type_t), sizeof (ctf_stype_t),
CTF_LSIZE_SENT));
}
static ssize_t
get_vbytes_common (ctf_dict_t *fp, unsigned short kind,
ssize_t size _libctf_unused_, size_t vlen)
{
switch (kind)
{
case CTF_K_INTEGER:
case CTF_K_FLOAT:
return (sizeof (uint32_t));
case CTF_K_SLICE:
return (sizeof (ctf_slice_t));
case CTF_K_ENUM:
return (sizeof (ctf_enum_t) * vlen);
case CTF_K_FORWARD:
case CTF_K_UNKNOWN:
case CTF_K_POINTER:
case CTF_K_TYPEDEF:
case CTF_K_VOLATILE:
case CTF_K_CONST:
case CTF_K_RESTRICT:
return 0;
default:
ctf_set_errno (fp, ECTF_CORRUPT);
ctf_err_warn (fp, 0, 0, _("detected invalid CTF kind: %x"), kind);
return -1;
}
}
static ssize_t
get_vbytes_v1 (ctf_dict_t *fp, unsigned short kind, ssize_t size, size_t vlen)
{
switch (kind)
{
case CTF_K_ARRAY:
return (sizeof (ctf_array_v1_t));
case CTF_K_FUNCTION:
return (sizeof (unsigned short) * (vlen + (vlen & 1)));
case CTF_K_STRUCT:
case CTF_K_UNION:
if (size < CTF_LSTRUCT_THRESH_V1)
return (sizeof (ctf_member_v1_t) * vlen);
else
return (sizeof (ctf_lmember_v1_t) * vlen);
}
return (get_vbytes_common (fp, kind, size, vlen));
}
static ssize_t
get_vbytes_v2 (ctf_dict_t *fp, unsigned short kind, ssize_t size, size_t vlen)
{
switch (kind)
{
case CTF_K_ARRAY:
return (sizeof (ctf_array_t));
case CTF_K_FUNCTION:
return (sizeof (uint32_t) * (vlen + (vlen & 1)));
case CTF_K_STRUCT:
case CTF_K_UNION:
if (size < CTF_LSTRUCT_THRESH)
return (sizeof (ctf_member_t) * vlen);
else
return (sizeof (ctf_lmember_t) * vlen);
}
return (get_vbytes_common (fp, kind, size, vlen));
}
static const ctf_dictops_t ctf_dictops[] = {
{NULL, NULL, NULL, NULL, NULL},
/* CTF_VERSION_1 */
{get_kind_v1, get_root_v1, get_vlen_v1, get_ctt_size_v1, get_vbytes_v1},
/* CTF_VERSION_1_UPGRADED_3 */
{get_kind_v2, get_root_v2, get_vlen_v2, get_ctt_size_v2, get_vbytes_v2},
/* CTF_VERSION_2 */
{get_kind_v2, get_root_v2, get_vlen_v2, get_ctt_size_v2, get_vbytes_v2},
/* CTF_VERSION_3, identical to 2: only new type kinds */
{get_kind_v2, get_root_v2, get_vlen_v2, get_ctt_size_v2, get_vbytes_v2},
};
/* Initialize the symtab translation table as appropriate for its indexing
state. For unindexed symtypetabs, fill each entry with the offset of the CTF
type or function data corresponding to each STT_FUNC or STT_OBJECT entry in
the symbol table. For indexed symtypetabs, do nothing: the needed
initialization for indexed lookups may be quite expensive, so it is done only
as needed, when lookups happen. (In particular, the majority of indexed
symtypetabs come from the compiler, and all the linker does is iteration over
all entries, which doesn't need this initialization.)
The SP symbol table section may be NULL if there is no symtab.
If init_symtab works on one call, it cannot fail on future calls to the same
fp: ctf_symsect_endianness relies on this. */
static int
init_symtab (ctf_dict_t *fp, const ctf_header_t *hp, const ctf_sect_t *sp)
{
const unsigned char *symp;
int skip_func_info = 0;
int i;
uint32_t *xp = fp->ctf_sxlate;
uint32_t *xend = xp + fp->ctf_nsyms;
uint32_t objtoff = hp->cth_objtoff;
uint32_t funcoff = hp->cth_funcoff;
/* If the CTF_F_NEWFUNCINFO flag is not set, pretend the func info section
is empty: this compiler is too old to emit a function info section we
understand. */
if (!(hp->cth_flags & CTF_F_NEWFUNCINFO))
skip_func_info = 1;
if (hp->cth_objtidxoff < hp->cth_funcidxoff)
fp->ctf_objtidx_names = (uint32_t *) (fp->ctf_buf + hp->cth_objtidxoff);
if (hp->cth_funcidxoff < hp->cth_varoff && !skip_func_info)
fp->ctf_funcidx_names = (uint32_t *) (fp->ctf_buf + hp->cth_funcidxoff);
/* Don't bother doing the rest if everything is indexed, or if we don't have a
symbol table: we will never use it. */
if ((fp->ctf_objtidx_names && fp->ctf_funcidx_names) || !sp || !sp->cts_data)
return 0;
/* The CTF data object and function type sections are ordered to match the
relative order of the respective symbol types in the symtab, unless there
is an index section, in which case the order is arbitrary and the index
gives the mapping. If no type information is available for a symbol table
entry, a pad is inserted in the CTF section. As a further optimization,
anonymous or undefined symbols are omitted from the CTF data. If an
index is available for function symbols but not object symbols, or vice
versa, we populate the xslate table for the unindexed symbols only. */
for (i = 0, symp = sp->cts_data; xp < xend; xp++, symp += sp->cts_entsize,
i++)
{
ctf_link_sym_t sym;
switch (sp->cts_entsize)
{
case sizeof (Elf64_Sym):
{
const Elf64_Sym *symp64 = (Elf64_Sym *) (uintptr_t) symp;
ctf_elf64_to_link_sym (fp, &sym, symp64, i);
}
break;
case sizeof (Elf32_Sym):
{
const Elf32_Sym *symp32 = (Elf32_Sym *) (uintptr_t) symp;
ctf_elf32_to_link_sym (fp, &sym, symp32, i);
}
break;
default:
return ECTF_SYMTAB;
}
/* This call may be led astray if our idea of the symtab's endianness is
wrong, but when this is fixed by a call to ctf_symsect_endianness,
init_symtab will be called again with the right endianness in
force. */
if (ctf_symtab_skippable (&sym))
{
*xp = -1u;
continue;
}
switch (sym.st_type)
{
case STT_OBJECT:
if (fp->ctf_objtidx_names || objtoff >= hp->cth_funcoff)
{
*xp = -1u;
break;
}
*xp = objtoff;
objtoff += sizeof (uint32_t);
break;
case STT_FUNC:
if (fp->ctf_funcidx_names || funcoff >= hp->cth_objtidxoff
|| skip_func_info)
{
*xp = -1u;
break;
}
*xp = funcoff;
funcoff += sizeof (uint32_t);
break;
default:
*xp = -1u;
break;
}
}
ctf_dprintf ("loaded %lu symtab entries\n", fp->ctf_nsyms);
return 0;
}
/* Reset the CTF base pointer and derive the buf pointer from it, initializing
everything in the ctf_dict that depends on the base or buf pointers.
The original gap between the buf and base pointers, if any -- the original,
unconverted CTF header -- is kept, but its contents are not specified and are
never used. */
static void
ctf_set_base (ctf_dict_t *fp, const ctf_header_t *hp, unsigned char *base)
{
fp->ctf_buf = base + (fp->ctf_buf - fp->ctf_base);
fp->ctf_base = base;
fp->ctf_vars = (ctf_varent_t *) ((const char *) fp->ctf_buf +
hp->cth_varoff);
fp->ctf_nvars = (hp->cth_typeoff - hp->cth_varoff) / sizeof (ctf_varent_t);
fp->ctf_str[CTF_STRTAB_0].cts_strs = (const char *) fp->ctf_buf
+ hp->cth_stroff;
fp->ctf_str[CTF_STRTAB_0].cts_len = hp->cth_strlen;
/* If we have a parent dict name and label, store the relocated string
pointers in the CTF dict for easy access later. */
/* Note: before conversion, these will be set to values that will be
immediately invalidated by the conversion process, but the conversion
process will call ctf_set_base() again to fix things up. */
if (hp->cth_parlabel != 0)
fp->ctf_parlabel = ctf_strptr (fp, hp->cth_parlabel);
if (hp->cth_parname != 0)
fp->ctf_parname = ctf_strptr (fp, hp->cth_parname);
if (hp->cth_cuname != 0)
fp->ctf_cuname = ctf_strptr (fp, hp->cth_cuname);
if (fp->ctf_cuname)
ctf_dprintf ("ctf_set_base: CU name %s\n", fp->ctf_cuname);
if (fp->ctf_parname)
ctf_dprintf ("ctf_set_base: parent name %s (label %s)\n",
fp->ctf_parname,
fp->ctf_parlabel ? fp->ctf_parlabel : "<NULL>");
}
/* Set the version of the CTF file. */
/* When this is reset, LCTF_* changes behaviour, but there is no guarantee that
the variable data list associated with each type has been upgraded: the
caller must ensure this has been done in advance. */
static void
ctf_set_version (ctf_dict_t *fp, ctf_header_t *cth, int ctf_version)
{
fp->ctf_version = ctf_version;
cth->cth_version = ctf_version;
fp->ctf_dictops = &ctf_dictops[ctf_version];
}
/* Upgrade the header to CTF_VERSION_3. The upgrade is done in-place. */
static void
upgrade_header (ctf_header_t *hp)
{
ctf_header_v2_t *oldhp = (ctf_header_v2_t *) hp;
hp->cth_strlen = oldhp->cth_strlen;
hp->cth_stroff = oldhp->cth_stroff;
hp->cth_typeoff = oldhp->cth_typeoff;
hp->cth_varoff = oldhp->cth_varoff;
hp->cth_funcidxoff = hp->cth_varoff; /* No index sections. */
hp->cth_objtidxoff = hp->cth_funcidxoff;
hp->cth_funcoff = oldhp->cth_funcoff;
hp->cth_objtoff = oldhp->cth_objtoff;
hp->cth_lbloff = oldhp->cth_lbloff;
hp->cth_cuname = 0; /* No CU name. */
}
/* Upgrade the type table to CTF_VERSION_3 (really CTF_VERSION_1_UPGRADED_3)
from CTF_VERSION_1.
The upgrade is not done in-place: the ctf_base is moved. ctf_strptr() must
not be called before reallocation is complete.
Sections not checked here due to nonexistence or nonpopulated state in older
formats: objtidx, funcidx.
Type kinds not checked here due to nonexistence in older formats:
CTF_K_SLICE. */
static int
upgrade_types_v1 (ctf_dict_t *fp, ctf_header_t *cth)
{
const ctf_type_v1_t *tbuf;
const ctf_type_v1_t *tend;
unsigned char *ctf_base, *old_ctf_base = (unsigned char *) fp->ctf_dynbase;
ctf_type_t *t2buf;
ssize_t increase = 0, size, increment, v2increment, vbytes, v2bytes;
const ctf_type_v1_t *tp;
ctf_type_t *t2p;
tbuf = (ctf_type_v1_t *) (fp->ctf_buf + cth->cth_typeoff);
tend = (ctf_type_v1_t *) (fp->ctf_buf + cth->cth_stroff);
/* Much like init_types(), this is a two-pass process.
First, figure out the new type-section size needed. (It is possible,
in theory, for it to be less than the old size, but this is very
unlikely. It cannot be so small that cth_typeoff ends up of negative
size. We validate this with an assertion below.)
We must cater not only for changes in vlen and types sizes but also
for changes in 'increment', which happen because v2 places some types
into ctf_stype_t where v1 would be forced to use the larger non-stype. */
for (tp = tbuf; tp < tend;
tp = (ctf_type_v1_t *) ((uintptr_t) tp + increment + vbytes))
{
unsigned short kind = CTF_V1_INFO_KIND (tp->ctt_info);
unsigned long vlen = CTF_V1_INFO_VLEN (tp->ctt_info);
size = get_ctt_size_v1 (fp, (const ctf_type_t *) tp, NULL, &increment);
vbytes = get_vbytes_v1 (fp, kind, size, vlen);
get_ctt_size_v2_unconverted (fp, (const ctf_type_t *) tp, NULL,
&v2increment);
v2bytes = get_vbytes_v2 (fp, kind, size, vlen);
if ((vbytes < 0) || (size < 0))
return ECTF_CORRUPT;
increase += v2increment - increment; /* May be negative. */
increase += v2bytes - vbytes;
}
/* Allocate enough room for the new buffer, then copy everything but the type
section into place, and reset the base accordingly. Leave the version
number unchanged, so that LCTF_INFO_* still works on the
as-yet-untranslated type info. */
if ((ctf_base = malloc (fp->ctf_size + increase)) == NULL)
return ECTF_ZALLOC;
/* Start at ctf_buf, not ctf_base, to squeeze out the original header: we
never use it and it is unconverted. */
memcpy (ctf_base, fp->ctf_buf, cth->cth_typeoff);
memcpy (ctf_base + cth->cth_stroff + increase,
fp->ctf_buf + cth->cth_stroff, cth->cth_strlen);
memset (ctf_base + cth->cth_typeoff, 0, cth->cth_stroff - cth->cth_typeoff
+ increase);
cth->cth_stroff += increase;
fp->ctf_size += increase;
assert (cth->cth_stroff >= cth->cth_typeoff);
fp->ctf_base = ctf_base;
fp->ctf_buf = ctf_base;
fp->ctf_dynbase = ctf_base;
ctf_set_base (fp, cth, ctf_base);
t2buf = (ctf_type_t *) (fp->ctf_buf + cth->cth_typeoff);
/* Iterate through all the types again, upgrading them.
Everything that hasn't changed can just be outright memcpy()ed.
Things that have changed need field-by-field consideration. */
for (tp = tbuf, t2p = t2buf; tp < tend;
tp = (ctf_type_v1_t *) ((uintptr_t) tp + increment + vbytes),
t2p = (ctf_type_t *) ((uintptr_t) t2p + v2increment + v2bytes))
{
unsigned short kind = CTF_V1_INFO_KIND (tp->ctt_info);
int isroot = CTF_V1_INFO_ISROOT (tp->ctt_info);
unsigned long vlen = CTF_V1_INFO_VLEN (tp->ctt_info);
ssize_t v2size;
void *vdata, *v2data;
size = get_ctt_size_v1 (fp, (const ctf_type_t *) tp, NULL, &increment);
vbytes = get_vbytes_v1 (fp, kind, size, vlen);
t2p->ctt_name = tp->ctt_name;
t2p->ctt_info = CTF_TYPE_INFO (kind, isroot, vlen);
switch (kind)
{
case CTF_K_FUNCTION:
case CTF_K_FORWARD:
case CTF_K_TYPEDEF:
case CTF_K_POINTER:
case CTF_K_VOLATILE:
case CTF_K_CONST:
case CTF_K_RESTRICT:
t2p->ctt_type = tp->ctt_type;
break;
case CTF_K_INTEGER:
case CTF_K_FLOAT:
case CTF_K_ARRAY:
case CTF_K_STRUCT:
case CTF_K_UNION:
case CTF_K_ENUM:
case CTF_K_UNKNOWN:
if ((size_t) size <= CTF_MAX_SIZE)
t2p->ctt_size = size;
else
{
t2p->ctt_lsizehi = CTF_SIZE_TO_LSIZE_HI (size);
t2p->ctt_lsizelo = CTF_SIZE_TO_LSIZE_LO (size);
}
break;
}
v2size = get_ctt_size_v2 (fp, t2p, NULL, &v2increment);
v2bytes = get_vbytes_v2 (fp, kind, v2size, vlen);
/* Catch out-of-sync get_ctt_size_*(). The count goes wrong if
these are not identical (and having them different makes no
sense semantically). */
assert (size == v2size);
/* Now the varlen info. */
vdata = (void *) ((uintptr_t) tp + increment);
v2data = (void *) ((uintptr_t) t2p + v2increment);
switch (kind)
{
case CTF_K_ARRAY:
{
const ctf_array_v1_t *ap = (const ctf_array_v1_t *) vdata;
ctf_array_t *a2p = (ctf_array_t *) v2data;
a2p->cta_contents = ap->cta_contents;
a2p->cta_index = ap->cta_index;
a2p->cta_nelems = ap->cta_nelems;
break;
}
case CTF_K_STRUCT:
case CTF_K_UNION:
{
ctf_member_t tmp;
const ctf_member_v1_t *m1 = (const ctf_member_v1_t *) vdata;
const ctf_lmember_v1_t *lm1 = (const ctf_lmember_v1_t *) m1;
ctf_member_t *m2 = (ctf_member_t *) v2data;
ctf_lmember_t *lm2 = (ctf_lmember_t *) m2;
unsigned long i;
/* We walk all four pointers forward, but only reference the two
that are valid for the given size, to avoid quadruplicating all
the code. */
for (i = vlen; i != 0; i--, m1++, lm1++, m2++, lm2++)
{
size_t offset;
if (size < CTF_LSTRUCT_THRESH_V1)
{
offset = m1->ctm_offset;
tmp.ctm_name = m1->ctm_name;
tmp.ctm_type = m1->ctm_type;
}
else
{
offset = CTF_LMEM_OFFSET (lm1);
tmp.ctm_name = lm1->ctlm_name;
tmp.ctm_type = lm1->ctlm_type;
}
if (size < CTF_LSTRUCT_THRESH)
{
m2->ctm_name = tmp.ctm_name;
m2->ctm_type = tmp.ctm_type;
m2->ctm_offset = offset;
}
else
{
lm2->ctlm_name = tmp.ctm_name;
lm2->ctlm_type = tmp.ctm_type;
lm2->ctlm_offsethi = CTF_OFFSET_TO_LMEMHI (offset);
lm2->ctlm_offsetlo = CTF_OFFSET_TO_LMEMLO (offset);
}
}
break;
}
case CTF_K_FUNCTION:
{
unsigned long i;
unsigned short *a1 = (unsigned short *) vdata;
uint32_t *a2 = (uint32_t *) v2data;
for (i = vlen; i != 0; i--, a1++, a2++)
*a2 = *a1;
}
/* FALLTHRU */
default:
/* Catch out-of-sync get_vbytes_*(). */
assert (vbytes == v2bytes);
memcpy (v2data, vdata, vbytes);
}
}
/* Verify that the entire region was converted. If not, we are either
converting too much, or too little (leading to a buffer overrun either here
or at read time, in init_types().) */
assert ((size_t) t2p - (size_t) fp->ctf_buf == cth->cth_stroff);
ctf_set_version (fp, cth, CTF_VERSION_1_UPGRADED_3);
free (old_ctf_base);
return 0;
}
/* Upgrade from any earlier version. */
static int
upgrade_types (ctf_dict_t *fp, ctf_header_t *cth)
{
switch (cth->cth_version)
{
/* v1 requires a full pass and reformatting. */
case CTF_VERSION_1:
upgrade_types_v1 (fp, cth);
/* FALLTHRU */
/* Already-converted v1 is just like later versions except that its
parent/child boundary is unchanged (and much lower). */
case CTF_VERSION_1_UPGRADED_3:
fp->ctf_parmax = CTF_MAX_PTYPE_V1;
/* v2 is just the same as v3 except for new types and sections:
no upgrading required. */
case CTF_VERSION_2: ;
/* FALLTHRU */
}
return 0;
}
/* Initialize the type ID translation table with the byte offset of each type,
and initialize the hash tables of each named type. Upgrade the type table to
the latest supported representation in the process, if needed, and if this
recension of libctf supports upgrading. */
static int
init_types (ctf_dict_t *fp, ctf_header_t *cth)
{
const ctf_type_t *tbuf;
const ctf_type_t *tend;
unsigned long pop[CTF_K_MAX + 1] = { 0 };
const ctf_type_t *tp;
uint32_t id, dst;
uint32_t *xp;
/* We determine whether the dict is a child or a parent based on the value of
cth_parname. */
int child = cth->cth_parname != 0;
int nlstructs = 0, nlunions = 0;
int err;
assert (!(fp->ctf_flags & LCTF_RDWR));
if (_libctf_unlikely_ (fp->ctf_version == CTF_VERSION_1))
{
int err;
if ((err = upgrade_types (fp, cth)) != 0)
return err; /* Upgrade failed. */
}
tbuf = (ctf_type_t *) (fp->ctf_buf + cth->cth_typeoff);
tend = (ctf_type_t *) (fp->ctf_buf + cth->cth_stroff);
/* We make two passes through the entire type section. In this first
pass, we count the number of each type and the total number of types. */
for (tp = tbuf; tp < tend; fp->ctf_typemax++)
{
unsigned short kind = LCTF_INFO_KIND (fp, tp->ctt_info);
unsigned long vlen = LCTF_INFO_VLEN (fp, tp->ctt_info);
ssize_t size, increment, vbytes;
(void) ctf_get_ctt_size (fp, tp, &size, &increment);
vbytes = LCTF_VBYTES (fp, kind, size, vlen);
if (vbytes < 0)
return ECTF_CORRUPT;
/* For forward declarations, ctt_type is the CTF_K_* kind for the tag,
so bump that population count too. */
if (kind == CTF_K_FORWARD)
pop[tp->ctt_type]++;
tp = (ctf_type_t *) ((uintptr_t) tp + increment + vbytes);
pop[kind]++;
}
if (child)
{
ctf_dprintf ("CTF dict %p is a child\n", (void *) fp);
fp->ctf_flags |= LCTF_CHILD;
}
else
ctf_dprintf ("CTF dict %p is a parent\n", (void *) fp);
/* Now that we've counted up the number of each type, we can allocate
the hash tables, type translation table, and pointer table. */
if ((fp->ctf_structs.ctn_readonly
= ctf_hash_create (pop[CTF_K_STRUCT], ctf_hash_string,
ctf_hash_eq_string)) == NULL)
return ENOMEM;
if ((fp->ctf_unions.ctn_readonly
= ctf_hash_create (pop[CTF_K_UNION], ctf_hash_string,
ctf_hash_eq_string)) == NULL)
return ENOMEM;
if ((fp->ctf_enums.ctn_readonly
= ctf_hash_create (pop[CTF_K_ENUM], ctf_hash_string,
ctf_hash_eq_string)) == NULL)
return ENOMEM;
if ((fp->ctf_names.ctn_readonly
= ctf_hash_create (pop[CTF_K_INTEGER] +
pop[CTF_K_FLOAT] +
pop[CTF_K_FUNCTION] +
pop[CTF_K_TYPEDEF] +
pop[CTF_K_POINTER] +
pop[CTF_K_VOLATILE] +
pop[CTF_K_CONST] +
pop[CTF_K_RESTRICT],
ctf_hash_string,
ctf_hash_eq_string)) == NULL)
return ENOMEM;
fp->ctf_txlate = malloc (sizeof (uint32_t) * (fp->ctf_typemax + 1));
fp->ctf_ptrtab_len = fp->ctf_typemax + 1;
fp->ctf_ptrtab = malloc (sizeof (uint32_t) * fp->ctf_ptrtab_len);
if (fp->ctf_txlate == NULL || fp->ctf_ptrtab == NULL)
return ENOMEM; /* Memory allocation failed. */
xp = fp->ctf_txlate;
*xp++ = 0; /* Type id 0 is used as a sentinel value. */
memset (fp->ctf_txlate, 0, sizeof (uint32_t) * (fp->ctf_typemax + 1));
memset (fp->ctf_ptrtab, 0, sizeof (uint32_t) * (fp->ctf_typemax + 1));
/* In the second pass through the types, we fill in each entry of the
type and pointer tables and add names to the appropriate hashes. */
for (id = 1, tp = tbuf; tp < tend; xp++, id++)
{
unsigned short kind = LCTF_INFO_KIND (fp, tp->ctt_info);
unsigned short isroot = LCTF_INFO_ISROOT (fp, tp->ctt_info);
unsigned long vlen = LCTF_INFO_VLEN (fp, tp->ctt_info);
ssize_t size, increment, vbytes;
const char *name;
(void) ctf_get_ctt_size (fp, tp, &size, &increment);
name = ctf_strptr (fp, tp->ctt_name);
/* Cannot fail: shielded by call in loop above. */
vbytes = LCTF_VBYTES (fp, kind, size, vlen);
switch (kind)
{
case CTF_K_INTEGER:
case CTF_K_FLOAT:
/* Names are reused by bit-fields, which are differentiated by their
encodings, and so typically we'd record only the first instance of
a given intrinsic. However, we replace an existing type with a
root-visible version so that we can be sure to find it when
checking for conflicting definitions in ctf_add_type(). */
if (((ctf_hash_lookup_type (fp->ctf_names.ctn_readonly,
fp, name)) == 0)
|| isroot)
{
err = ctf_hash_define_type (fp->ctf_names.ctn_readonly, fp,
LCTF_INDEX_TO_TYPE (fp, id, child),
tp->ctt_name);
if (err != 0)
return err;
}
break;
/* These kinds have no name, so do not need interning into any
hashtables. */
case CTF_K_ARRAY:
case CTF_K_SLICE:
break;
case CTF_K_FUNCTION:
if (!isroot)
break;
err = ctf_hash_insert_type (fp->ctf_names.ctn_readonly, fp,
LCTF_INDEX_TO_TYPE (fp, id, child),
tp->ctt_name);
if (err != 0)
return err;
break;
case CTF_K_STRUCT:
if (size >= CTF_LSTRUCT_THRESH)
nlstructs++;
if (!isroot)
break;
err = ctf_hash_define_type (fp->ctf_structs.ctn_readonly, fp,
LCTF_INDEX_TO_TYPE (fp, id, child),
tp->ctt_name);
if (err != 0)
return err;
break;
case CTF_K_UNION:
if (size >= CTF_LSTRUCT_THRESH)
nlunions++;
if (!isroot)
break;
err = ctf_hash_define_type (fp->ctf_unions.ctn_readonly, fp,
LCTF_INDEX_TO_TYPE (fp, id, child),
tp->ctt_name);
if (err != 0)
return err;
break;
case CTF_K_ENUM:
if (!isroot)
break;
err = ctf_hash_define_type (fp->ctf_enums.ctn_readonly, fp,
LCTF_INDEX_TO_TYPE (fp, id, child),
tp->ctt_name);
if (err != 0)
return err;
break;
case CTF_K_TYPEDEF:
if (!isroot)
break;
err = ctf_hash_insert_type (fp->ctf_names.ctn_readonly, fp,
LCTF_INDEX_TO_TYPE (fp, id, child),
tp->ctt_name);
if (err != 0)
return err;
break;
case CTF_K_FORWARD:
{
ctf_names_t *np = ctf_name_table (fp, tp->ctt_type);
if (!isroot)
break;
/* Only insert forward tags into the given hash if the type or tag
name is not already present. */
if (ctf_hash_lookup_type (np->ctn_readonly, fp, name) == 0)
{
err = ctf_hash_insert_type (np->ctn_readonly, fp,
LCTF_INDEX_TO_TYPE (fp, id, child),
tp->ctt_name);
if (err != 0)
return err;
}
break;
}
case CTF_K_POINTER:
/* If the type referenced by the pointer is in this CTF dict, then
store the index of the pointer type in fp->ctf_ptrtab[ index of
referenced type ]. */
if (LCTF_TYPE_ISCHILD (fp, tp->ctt_type) == child
&& LCTF_TYPE_TO_INDEX (fp, tp->ctt_type) <= fp->ctf_typemax)
fp->ctf_ptrtab[LCTF_TYPE_TO_INDEX (fp, tp->ctt_type)] = id;
/*FALLTHRU*/
case CTF_K_VOLATILE:
case CTF_K_CONST:
case CTF_K_RESTRICT:
if (!isroot)
break;
err = ctf_hash_insert_type (fp->ctf_names.ctn_readonly, fp,
LCTF_INDEX_TO_TYPE (fp, id, child),
tp->ctt_name);
if (err != 0)
return err;
break;
default:
ctf_err_warn (fp, 0, ECTF_CORRUPT,
_("init_types(): unhandled CTF kind: %x"), kind);
return ECTF_CORRUPT;
}
*xp = (uint32_t) ((uintptr_t) tp - (uintptr_t) fp->ctf_buf);
tp = (ctf_type_t *) ((uintptr_t) tp + increment + vbytes);
}
ctf_dprintf ("%lu total types processed\n", fp->ctf_typemax);
ctf_dprintf ("%u enum names hashed\n",
ctf_hash_size (fp->ctf_enums.ctn_readonly));
ctf_dprintf ("%u struct names hashed (%d long)\n",
ctf_hash_size (fp->ctf_structs.ctn_readonly), nlstructs);
ctf_dprintf ("%u union names hashed (%d long)\n",
ctf_hash_size (fp->ctf_unions.ctn_readonly), nlunions);
ctf_dprintf ("%u base type names hashed\n",
ctf_hash_size (fp->ctf_names.ctn_readonly));
/* Make an additional pass through the pointer table to find pointers that
point to anonymous typedef nodes. If we find one, modify the pointer table
so that the pointer is also known to point to the node that is referenced
by the anonymous typedef node. */
for (id = 1; id <= fp->ctf_typemax; id++)
{
if ((dst = fp->ctf_ptrtab[id]) != 0)
{
tp = LCTF_INDEX_TO_TYPEPTR (fp, id);
if (LCTF_INFO_KIND (fp, tp->ctt_info) == CTF_K_TYPEDEF
&& strcmp (ctf_strptr (fp, tp->ctt_name), "") == 0
&& LCTF_TYPE_ISCHILD (fp, tp->ctt_type) == child
&& LCTF_TYPE_TO_INDEX (fp, tp->ctt_type) <= fp->ctf_typemax)
fp->ctf_ptrtab[LCTF_TYPE_TO_INDEX (fp, tp->ctt_type)] = dst;
}
}
return 0;
}
/* Endianness-flipping routines.
We flip everything, mindlessly, even 1-byte entities, so that future
expansions do not require changes to this code. */
/* Flip the endianness of the CTF header. */
static void
flip_header (ctf_header_t *cth)
{
swap_thing (cth->cth_preamble.ctp_magic);
swap_thing (cth->cth_preamble.ctp_version);
swap_thing (cth->cth_preamble.ctp_flags);
swap_thing (cth->cth_parlabel);
swap_thing (cth->cth_parname);
swap_thing (cth->cth_cuname);
swap_thing (cth->cth_objtoff);
swap_thing (cth->cth_funcoff);
swap_thing (cth->cth_objtidxoff);
swap_thing (cth->cth_funcidxoff);
swap_thing (cth->cth_varoff);
swap_thing (cth->cth_typeoff);
swap_thing (cth->cth_stroff);