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
|
/* Everything about syscall catchpoints, for GDB.
Copyright (C) 2009-2016 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include <ctype.h>
#include "breakpoint.h"
#include "gdbcmd.h"
#include "inferior.h"
#include "cli/cli-utils.h"
#include "annotate.h"
#include "mi/mi-common.h"
#include "valprint.h"
#include "arch-utils.h"
#include "observer.h"
#include "xml-syscall.h"
/* An instance of this type is used to represent a syscall catchpoint.
It includes a "struct breakpoint" as a kind of base class; users
downcast to "struct breakpoint *" when needed. A breakpoint is
really of this type iff its ops pointer points to
CATCH_SYSCALL_BREAKPOINT_OPS. */
struct syscall_catchpoint
{
/* The base class. */
struct breakpoint base;
/* Syscall numbers used for the 'catch syscall' feature. If no
syscall has been specified for filtering, its value is NULL.
Otherwise, it holds a list of all syscalls to be caught. The
list elements are allocated with xmalloc. */
VEC(int) *syscalls_to_be_caught;
};
/* Implement the "dtor" breakpoint_ops method for syscall
catchpoints. */
static void
dtor_catch_syscall (struct breakpoint *b)
{
struct syscall_catchpoint *c = (struct syscall_catchpoint *) b;
VEC_free (int, c->syscalls_to_be_caught);
base_breakpoint_ops.dtor (b);
}
static const struct inferior_data *catch_syscall_inferior_data = NULL;
struct catch_syscall_inferior_data
{
/* We keep a count of the number of times the user has requested a
particular syscall to be tracked, and pass this information to the
target. This lets capable targets implement filtering directly. */
/* Number of times that "any" syscall is requested. */
int any_syscall_count;
/* Count of each system call. */
VEC(int) *syscalls_counts;
/* This counts all syscall catch requests, so we can readily determine
if any catching is necessary. */
int total_syscalls_count;
};
static struct catch_syscall_inferior_data*
get_catch_syscall_inferior_data (struct inferior *inf)
{
struct catch_syscall_inferior_data *inf_data;
inf_data = ((struct catch_syscall_inferior_data *)
inferior_data (inf, catch_syscall_inferior_data));
if (inf_data == NULL)
{
inf_data = XCNEW (struct catch_syscall_inferior_data);
set_inferior_data (inf, catch_syscall_inferior_data, inf_data);
}
return inf_data;
}
static void
catch_syscall_inferior_data_cleanup (struct inferior *inf, void *arg)
{
xfree (arg);
}
/* Implement the "insert" breakpoint_ops method for syscall
catchpoints. */
static int
insert_catch_syscall (struct bp_location *bl)
{
struct syscall_catchpoint *c = (struct syscall_catchpoint *) bl->owner;
struct inferior *inf = current_inferior ();
struct catch_syscall_inferior_data *inf_data
= get_catch_syscall_inferior_data (inf);
++inf_data->total_syscalls_count;
if (!c->syscalls_to_be_caught)
++inf_data->any_syscall_count;
else
{
int i, iter;
for (i = 0;
VEC_iterate (int, c->syscalls_to_be_caught, i, iter);
i++)
{
int elem;
if (iter >= VEC_length (int, inf_data->syscalls_counts))
{
int old_size = VEC_length (int, inf_data->syscalls_counts);
uintptr_t vec_addr_offset
= old_size * ((uintptr_t) sizeof (int));
uintptr_t vec_addr;
VEC_safe_grow (int, inf_data->syscalls_counts, iter + 1);
vec_addr = ((uintptr_t) VEC_address (int,
inf_data->syscalls_counts)
+ vec_addr_offset);
memset ((void *) vec_addr, 0,
(iter + 1 - old_size) * sizeof (int));
}
elem = VEC_index (int, inf_data->syscalls_counts, iter);
VEC_replace (int, inf_data->syscalls_counts, iter, ++elem);
}
}
return target_set_syscall_catchpoint (ptid_get_pid (inferior_ptid),
inf_data->total_syscalls_count != 0,
inf_data->any_syscall_count,
VEC_length (int,
inf_data->syscalls_counts),
VEC_address (int,
inf_data->syscalls_counts));
}
/* Implement the "remove" breakpoint_ops method for syscall
catchpoints. */
static int
remove_catch_syscall (struct bp_location *bl)
{
struct syscall_catchpoint *c = (struct syscall_catchpoint *) bl->owner;
struct inferior *inf = current_inferior ();
struct catch_syscall_inferior_data *inf_data
= get_catch_syscall_inferior_data (inf);
--inf_data->total_syscalls_count;
if (!c->syscalls_to_be_caught)
--inf_data->any_syscall_count;
else
{
int i, iter;
for (i = 0;
VEC_iterate (int, c->syscalls_to_be_caught, i, iter);
i++)
{
int elem;
if (iter >= VEC_length (int, inf_data->syscalls_counts))
/* Shouldn't happen. */
continue;
elem = VEC_index (int, inf_data->syscalls_counts, iter);
VEC_replace (int, inf_data->syscalls_counts, iter, --elem);
}
}
return target_set_syscall_catchpoint (ptid_get_pid (inferior_ptid),
inf_data->total_syscalls_count != 0,
inf_data->any_syscall_count,
VEC_length (int,
inf_data->syscalls_counts),
VEC_address (int,
inf_data->syscalls_counts));
}
/* Implement the "breakpoint_hit" breakpoint_ops method for syscall
catchpoints. */
static int
breakpoint_hit_catch_syscall (const struct bp_location *bl,
struct address_space *aspace, CORE_ADDR bp_addr,
const struct target_waitstatus *ws)
{
/* We must check if we are catching specific syscalls in this
breakpoint. If we are, then we must guarantee that the called
syscall is the same syscall we are catching. */
int syscall_number = 0;
const struct syscall_catchpoint *c
= (const struct syscall_catchpoint *) bl->owner;
if (ws->kind != TARGET_WAITKIND_SYSCALL_ENTRY
&& ws->kind != TARGET_WAITKIND_SYSCALL_RETURN)
return 0;
syscall_number = ws->value.syscall_number;
/* Now, checking if the syscall is the same. */
if (c->syscalls_to_be_caught)
{
int i, iter;
for (i = 0;
VEC_iterate (int, c->syscalls_to_be_caught, i, iter);
i++)
if (syscall_number == iter)
return 1;
return 0;
}
return 1;
}
/* Implement the "print_it" breakpoint_ops method for syscall
catchpoints. */
static enum print_stop_action
print_it_catch_syscall (bpstat bs)
{
struct ui_out *uiout = current_uiout;
struct breakpoint *b = bs->breakpoint_at;
/* These are needed because we want to know in which state a
syscall is. It can be in the TARGET_WAITKIND_SYSCALL_ENTRY
or TARGET_WAITKIND_SYSCALL_RETURN, and depending on it we
must print "called syscall" or "returned from syscall". */
ptid_t ptid;
struct target_waitstatus last;
struct syscall s;
struct gdbarch *gdbarch = bs->bp_location_at->gdbarch;
get_last_target_status (&ptid, &last);
get_syscall_by_number (gdbarch, last.value.syscall_number, &s);
annotate_catchpoint (b->number);
maybe_print_thread_hit_breakpoint (uiout);
if (b->disposition == disp_del)
ui_out_text (uiout, "Temporary catchpoint ");
else
ui_out_text (uiout, "Catchpoint ");
if (ui_out_is_mi_like_p (uiout))
{
ui_out_field_string (uiout, "reason",
async_reason_lookup (last.kind == TARGET_WAITKIND_SYSCALL_ENTRY
? EXEC_ASYNC_SYSCALL_ENTRY
: EXEC_ASYNC_SYSCALL_RETURN));
ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition));
}
ui_out_field_int (uiout, "bkptno", b->number);
if (last.kind == TARGET_WAITKIND_SYSCALL_ENTRY)
ui_out_text (uiout, " (call to syscall ");
else
ui_out_text (uiout, " (returned from syscall ");
if (s.name == NULL || ui_out_is_mi_like_p (uiout))
ui_out_field_int (uiout, "syscall-number", last.value.syscall_number);
if (s.name != NULL)
ui_out_field_string (uiout, "syscall-name", s.name);
ui_out_text (uiout, "), ");
return PRINT_SRC_AND_LOC;
}
/* Implement the "print_one" breakpoint_ops method for syscall
catchpoints. */
static void
print_one_catch_syscall (struct breakpoint *b,
struct bp_location **last_loc)
{
struct syscall_catchpoint *c = (struct syscall_catchpoint *) b;
struct value_print_options opts;
struct ui_out *uiout = current_uiout;
struct gdbarch *gdbarch = b->loc->gdbarch;
get_user_print_options (&opts);
/* Field 4, the address, is omitted (which makes the columns not
line up too nicely with the headers, but the effect is relatively
readable). */
if (opts.addressprint)
ui_out_field_skip (uiout, "addr");
annotate_field (5);
if (c->syscalls_to_be_caught
&& VEC_length (int, c->syscalls_to_be_caught) > 1)
ui_out_text (uiout, "syscalls \"");
else
ui_out_text (uiout, "syscall \"");
if (c->syscalls_to_be_caught)
{
int i, iter;
char *text = xstrprintf ("%s", "");
for (i = 0;
VEC_iterate (int, c->syscalls_to_be_caught, i, iter);
i++)
{
char *x = text;
struct syscall s;
get_syscall_by_number (gdbarch, iter, &s);
if (s.name != NULL)
text = xstrprintf ("%s%s, ", text, s.name);
else
text = xstrprintf ("%s%d, ", text, iter);
/* We have to xfree the last 'text' (now stored at 'x')
because xstrprintf dynamically allocates new space for it
on every call. */
xfree (x);
}
/* Remove the last comma. */
text[strlen (text) - 2] = '\0';
ui_out_field_string (uiout, "what", text);
}
else
ui_out_field_string (uiout, "what", "<any syscall>");
ui_out_text (uiout, "\" ");
if (ui_out_is_mi_like_p (uiout))
ui_out_field_string (uiout, "catch-type", "syscall");
}
/* Implement the "print_mention" breakpoint_ops method for syscall
catchpoints. */
static void
print_mention_catch_syscall (struct breakpoint *b)
{
struct syscall_catchpoint *c = (struct syscall_catchpoint *) b;
struct gdbarch *gdbarch = b->loc->gdbarch;
if (c->syscalls_to_be_caught)
{
int i, iter;
if (VEC_length (int, c->syscalls_to_be_caught) > 1)
printf_filtered (_("Catchpoint %d (syscalls"), b->number);
else
printf_filtered (_("Catchpoint %d (syscall"), b->number);
for (i = 0;
VEC_iterate (int, c->syscalls_to_be_caught, i, iter);
i++)
{
struct syscall s;
get_syscall_by_number (gdbarch, iter, &s);
if (s.name)
printf_filtered (" '%s' [%d]", s.name, s.number);
else
printf_filtered (" %d", s.number);
}
printf_filtered (")");
}
else
printf_filtered (_("Catchpoint %d (any syscall)"),
b->number);
}
/* Implement the "print_recreate" breakpoint_ops method for syscall
catchpoints. */
static void
print_recreate_catch_syscall (struct breakpoint *b, struct ui_file *fp)
{
struct syscall_catchpoint *c = (struct syscall_catchpoint *) b;
struct gdbarch *gdbarch = b->loc->gdbarch;
fprintf_unfiltered (fp, "catch syscall");
if (c->syscalls_to_be_caught)
{
int i, iter;
for (i = 0;
VEC_iterate (int, c->syscalls_to_be_caught, i, iter);
i++)
{
struct syscall s;
get_syscall_by_number (gdbarch, iter, &s);
if (s.name)
fprintf_unfiltered (fp, " %s", s.name);
else
fprintf_unfiltered (fp, " %d", s.number);
}
}
print_recreate_thread (b, fp);
}
/* The breakpoint_ops structure to be used in syscall catchpoints. */
static struct breakpoint_ops catch_syscall_breakpoint_ops;
/* Returns non-zero if 'b' is a syscall catchpoint. */
static int
syscall_catchpoint_p (struct breakpoint *b)
{
return (b->ops == &catch_syscall_breakpoint_ops);
}
static void
create_syscall_event_catchpoint (int tempflag, VEC(int) *filter,
const struct breakpoint_ops *ops)
{
struct syscall_catchpoint *c;
struct gdbarch *gdbarch = get_current_arch ();
c = XNEW (struct syscall_catchpoint);
init_catchpoint (&c->base, gdbarch, tempflag, NULL, ops);
c->syscalls_to_be_caught = filter;
install_breakpoint (0, &c->base, 1);
}
/* Splits the argument using space as delimiter. Returns an xmalloc'd
filter list, or NULL if no filtering is required. */
static VEC(int) *
catch_syscall_split_args (char *arg)
{
VEC(int) *result = NULL;
struct cleanup *cleanup = make_cleanup (VEC_cleanup (int), &result);
struct gdbarch *gdbarch = target_gdbarch ();
while (*arg != '\0')
{
int i, syscall_number;
char *endptr;
char cur_name[128];
struct syscall s;
/* Skip whitespace. */
arg = skip_spaces (arg);
for (i = 0; i < 127 && arg[i] && !isspace (arg[i]); ++i)
cur_name[i] = arg[i];
cur_name[i] = '\0';
arg += i;
/* Check if the user provided a syscall name, group, or a number. */
syscall_number = (int) strtol (cur_name, &endptr, 0);
if (*endptr == '\0')
{
get_syscall_by_number (gdbarch, syscall_number, &s);
VEC_safe_push (int, result, s.number);
}
else if (startswith (cur_name, "g:")
|| startswith (cur_name, "group:"))
{
/* We have a syscall group. Let's expand it into a syscall
list before inserting. */
struct syscall *syscall_list;
const char *group_name;
/* Skip over "g:" and "group:" prefix strings. */
group_name = strchr (cur_name, ':') + 1;
syscall_list = get_syscalls_by_group (gdbarch, group_name);
if (syscall_list == NULL)
error (_("Unknown syscall group '%s'."), group_name);
for (i = 0; syscall_list[i].name != NULL; i++)
{
/* Insert each syscall that are part of the group. No
need to check if it is valid. */
VEC_safe_push (int, result, syscall_list[i].number);
}
xfree (syscall_list);
}
else
{
/* We have a name. Let's check if it's valid and convert it
to a number. */
get_syscall_by_name (gdbarch, cur_name, &s);
if (s.number == UNKNOWN_SYSCALL)
/* Here we have to issue an error instead of a warning,
because GDB cannot do anything useful if there's no
syscall number to be caught. */
error (_("Unknown syscall name '%s'."), cur_name);
/* Ok, it's valid. */
VEC_safe_push (int, result, s.number);
}
}
discard_cleanups (cleanup);
return result;
}
/* Implement the "catch syscall" command. */
static void
catch_syscall_command_1 (char *arg, int from_tty,
struct cmd_list_element *command)
{
int tempflag;
VEC(int) *filter;
struct syscall s;
struct gdbarch *gdbarch = get_current_arch ();
/* Checking if the feature if supported. */
if (gdbarch_get_syscall_number_p (gdbarch) == 0)
error (_("The feature 'catch syscall' is not supported on \
this architecture yet."));
tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
arg = skip_spaces (arg);
/* We need to do this first "dummy" translation in order
to get the syscall XML file loaded or, most important,
to display a warning to the user if there's no XML file
for his/her architecture. */
get_syscall_by_number (gdbarch, 0, &s);
/* The allowed syntax is:
catch syscall
catch syscall <name | number> [<name | number> ... <name | number>]
Let's check if there's a syscall name. */
if (arg != NULL)
filter = catch_syscall_split_args (arg);
else
filter = NULL;
create_syscall_event_catchpoint (tempflag, filter,
&catch_syscall_breakpoint_ops);
}
/* Returns 0 if 'bp' is NOT a syscall catchpoint,
non-zero otherwise. */
static int
is_syscall_catchpoint_enabled (struct breakpoint *bp)
{
if (syscall_catchpoint_p (bp)
&& bp->enable_state != bp_disabled
&& bp->enable_state != bp_call_disabled)
return 1;
else
return 0;
}
int
catch_syscall_enabled (void)
{
struct catch_syscall_inferior_data *inf_data
= get_catch_syscall_inferior_data (current_inferior ());
return inf_data->total_syscalls_count != 0;
}
/* Helper function for catching_syscall_number. If B is a syscall
catchpoint for SYSCALL_NUMBER, return 1 (which will make
'breakpoint_find_if' return). Otherwise, return 0. */
static int
catching_syscall_number_1 (struct breakpoint *b,
void *data)
{
int syscall_number = (int) (uintptr_t) data;
if (is_syscall_catchpoint_enabled (b))
{
struct syscall_catchpoint *c = (struct syscall_catchpoint *) b;
if (c->syscalls_to_be_caught)
{
int i, iter;
for (i = 0;
VEC_iterate (int, c->syscalls_to_be_caught, i, iter);
i++)
if (syscall_number == iter)
return 1;
}
else
return 1;
}
return 0;
}
int
catching_syscall_number (int syscall_number)
{
struct breakpoint *b = breakpoint_find_if (catching_syscall_number_1,
(void *) (uintptr_t) syscall_number);
return b != NULL;
}
/* Complete syscall names. Used by "catch syscall". */
static VEC (char_ptr) *
catch_syscall_completer (struct cmd_list_element *cmd,
const char *text, const char *word)
{
struct gdbarch *gdbarch = get_current_arch ();
struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
VEC (char_ptr) *group_retlist = NULL;
VEC (char_ptr) *syscall_retlist = NULL;
VEC (char_ptr) *retlist = NULL;
const char **group_list = NULL;
const char **syscall_list = NULL;
const char *prefix;
int i;
/* Completion considers ':' to be a word separator, so we use this to
verify whether the previous word was a group prefix. If so, we
build the completion list using group names only. */
for (prefix = word; prefix != text && prefix[-1] != ' '; prefix--)
;
if (startswith (prefix, "g:") || startswith (prefix, "group:"))
{
/* Perform completion inside 'group:' namespace only. */
group_list = get_syscall_group_names (gdbarch);
retlist = (group_list == NULL
? NULL : complete_on_enum (group_list, word, word));
}
else
{
/* Complete with both, syscall names and groups. */
syscall_list = get_syscall_names (gdbarch);
group_list = get_syscall_group_names (gdbarch);
/* Append "group:" prefix to syscall groups. */
for (i = 0; group_list[i] != NULL; i++)
{
char *prefixed_group = xstrprintf ("group:%s", group_list[i]);
group_list[i] = prefixed_group;
make_cleanup (xfree, prefixed_group);
}
syscall_retlist = ((syscall_list == NULL)
? NULL : complete_on_enum (syscall_list, word, word));
group_retlist = ((group_list == NULL)
? NULL : complete_on_enum (group_list, word, word));
retlist = VEC_merge (char_ptr, syscall_retlist, group_retlist);
}
VEC_free (char_ptr, syscall_retlist);
VEC_free (char_ptr, group_retlist);
xfree (syscall_list);
xfree (group_list);
do_cleanups (cleanups);
return retlist;
}
static void
clear_syscall_counts (struct inferior *inf)
{
struct catch_syscall_inferior_data *inf_data
= get_catch_syscall_inferior_data (inf);
inf_data->total_syscalls_count = 0;
inf_data->any_syscall_count = 0;
VEC_free (int, inf_data->syscalls_counts);
}
static void
initialize_syscall_catchpoint_ops (void)
{
struct breakpoint_ops *ops;
initialize_breakpoint_ops ();
/* Syscall catchpoints. */
ops = &catch_syscall_breakpoint_ops;
*ops = base_breakpoint_ops;
ops->dtor = dtor_catch_syscall;
ops->insert_location = insert_catch_syscall;
ops->remove_location = remove_catch_syscall;
ops->breakpoint_hit = breakpoint_hit_catch_syscall;
ops->print_it = print_it_catch_syscall;
ops->print_one = print_one_catch_syscall;
ops->print_mention = print_mention_catch_syscall;
ops->print_recreate = print_recreate_catch_syscall;
}
initialize_file_ftype _initialize_break_catch_syscall;
void
_initialize_break_catch_syscall (void)
{
initialize_syscall_catchpoint_ops ();
observer_attach_inferior_exit (clear_syscall_counts);
catch_syscall_inferior_data
= register_inferior_data_with_cleanup (NULL,
catch_syscall_inferior_data_cleanup);
add_catch_command ("syscall", _("\
Catch system calls by their names, groups and/or numbers.\n\
Arguments say which system calls to catch. If no arguments are given,\n\
every system call will be caught. Arguments, if given, should be one\n\
or more system call names (if your system supports that), system call\n\
groups or system call numbers."),
catch_syscall_command_1,
catch_syscall_completer,
CATCH_PERMANENT,
CATCH_TEMPORARY);
}
|