1 /*
2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
3 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
6 * Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
7 * Linux for s390 port by D.J. Barrow
8 * <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com>
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include "defs.h"
35 #include "native_defs.h"
36 #include <sys/param.h>
37
38 /* for struct iovec */
39 #include <sys/uio.h>
40
41 #include "regs.h"
42 #include "ptrace.h"
43
44 #if defined(SPARC64)
45 # undef PTRACE_GETREGS
46 # define PTRACE_GETREGS PTRACE_GETREGS64
47 # undef PTRACE_SETREGS
48 # define PTRACE_SETREGS PTRACE_SETREGS64
49 #endif
50
51 #if defined SPARC64
52 # include <asm/psrcompat.h>
53 #elif defined SPARC
54 # include <asm/psr.h>
55 #endif
56
57 #ifdef IA64
58 # include <asm/rse.h>
59 #endif
60
61 #ifndef NT_PRSTATUS
62 # define NT_PRSTATUS 1
63 #endif
64
65 #ifndef NSIG
66 # warning: NSIG is not defined, using 32
67 # define NSIG 32
68 #endif
69
70 #include "syscall.h"
71
72 /* Define these shorthand notations to simplify the syscallent files. */
73 #define TD TRACE_DESC
74 #define TF TRACE_FILE
75 #define TI TRACE_IPC
76 #define TN TRACE_NETWORK
77 #define TP TRACE_PROCESS
78 #define TS TRACE_SIGNAL
79 #define TM TRACE_MEMORY
80 #define NF SYSCALL_NEVER_FAILS
81 #define MA MAX_ARGS
82 #define SI STACKTRACE_INVALIDATE_CACHE
83 #define SE STACKTRACE_CAPTURE_ON_ENTER
84
85 #define SEN(syscall_name) SEN_ ## syscall_name, SYS_FUNC_NAME(sys_ ## syscall_name)
86
87 const struct_sysent sysent0[] = {
88 #include "syscallent.h"
89 };
90
91 #if SUPPORTED_PERSONALITIES > 1
92 # include PERSONALITY1_INCLUDE_FUNCS
93 static const struct_sysent sysent1[] = {
94 # include "syscallent1.h"
95 };
96 #endif
97
98 #if SUPPORTED_PERSONALITIES > 2
99 # include PERSONALITY2_INCLUDE_FUNCS
100 static const struct_sysent sysent2[] = {
101 # include "syscallent2.h"
102 };
103 #endif
104
105 /* Now undef them since short defines cause wicked namespace pollution. */
106 #undef SEN
107 #undef TD
108 #undef TF
109 #undef TI
110 #undef TN
111 #undef TP
112 #undef TS
113 #undef TM
114 #undef NF
115 #undef MA
116 #undef SI
117 #undef SE
118
119 /*
120 * `ioctlent[012].h' files are automatically generated by the auxiliary
121 * program `ioctlsort', such that the list is sorted by the `code' field.
122 * This has the side-effect of resolving the _IO.. macros into
123 * plain integers, eliminating the need to include here everything
124 * in "/usr/include".
125 */
126
127 const char *const errnoent0[] = {
128 #include "errnoent.h"
129 };
130 const char *const signalent0[] = {
131 #include "signalent.h"
132 };
133 const struct_ioctlent ioctlent0[] = {
134 #include "ioctlent0.h"
135 };
136
137 #if SUPPORTED_PERSONALITIES > 1
138 static const char *const errnoent1[] = {
139 # include "errnoent1.h"
140 };
141 static const char *const signalent1[] = {
142 # include "signalent1.h"
143 };
144 static const struct_ioctlent ioctlent1[] = {
145 # include "ioctlent1.h"
146 };
147 # include PERSONALITY0_INCLUDE_PRINTERS_DECLS
148 static const struct_printers printers0 = {
149 # include PERSONALITY0_INCLUDE_PRINTERS_DEFS
150 };
151 # include PERSONALITY1_INCLUDE_PRINTERS_DECLS
152 static const struct_printers printers1 = {
153 # include PERSONALITY1_INCLUDE_PRINTERS_DEFS
154 };
155 #endif
156
157 #if SUPPORTED_PERSONALITIES > 2
158 static const char *const errnoent2[] = {
159 # include "errnoent2.h"
160 };
161 static const char *const signalent2[] = {
162 # include "signalent2.h"
163 };
164 static const struct_ioctlent ioctlent2[] = {
165 # include "ioctlent2.h"
166 };
167 # include PERSONALITY2_INCLUDE_PRINTERS_DECLS
168 static const struct_printers printers2 = {
169 # include PERSONALITY2_INCLUDE_PRINTERS_DEFS
170 };
171 #endif
172
173 enum {
174 nsyscalls0 = ARRAY_SIZE(sysent0)
175 #if SUPPORTED_PERSONALITIES > 1
176 , nsyscalls1 = ARRAY_SIZE(sysent1)
177 # if SUPPORTED_PERSONALITIES > 2
178 , nsyscalls2 = ARRAY_SIZE(sysent2)
179 # endif
180 #endif
181 };
182
183 enum {
184 nerrnos0 = ARRAY_SIZE(errnoent0)
185 #if SUPPORTED_PERSONALITIES > 1
186 , nerrnos1 = ARRAY_SIZE(errnoent1)
187 # if SUPPORTED_PERSONALITIES > 2
188 , nerrnos2 = ARRAY_SIZE(errnoent2)
189 # endif
190 #endif
191 };
192
193 enum {
194 nsignals0 = ARRAY_SIZE(signalent0)
195 #if SUPPORTED_PERSONALITIES > 1
196 , nsignals1 = ARRAY_SIZE(signalent1)
197 # if SUPPORTED_PERSONALITIES > 2
198 , nsignals2 = ARRAY_SIZE(signalent2)
199 # endif
200 #endif
201 };
202
203 enum {
204 nioctlents0 = ARRAY_SIZE(ioctlent0)
205 #if SUPPORTED_PERSONALITIES > 1
206 , nioctlents1 = ARRAY_SIZE(ioctlent1)
207 # if SUPPORTED_PERSONALITIES > 2
208 , nioctlents2 = ARRAY_SIZE(ioctlent2)
209 # endif
210 #endif
211 };
212
213 #if SUPPORTED_PERSONALITIES > 1
214 const struct_sysent *sysent = sysent0;
215 const char *const *errnoent = errnoent0;
216 const char *const *signalent = signalent0;
217 const struct_ioctlent *ioctlent = ioctlent0;
218 const struct_printers *printers = &printers0;
219 #endif
220
221 unsigned nsyscalls = nsyscalls0;
222 unsigned nerrnos = nerrnos0;
223 unsigned nsignals = nsignals0;
224 unsigned nioctlents = nioctlents0;
225
226 unsigned num_quals;
227 qualbits_t *qual_vec[SUPPORTED_PERSONALITIES];
228
229 static const unsigned nsyscall_vec[SUPPORTED_PERSONALITIES] = {
230 nsyscalls0,
231 #if SUPPORTED_PERSONALITIES > 1
232 nsyscalls1,
233 #endif
234 #if SUPPORTED_PERSONALITIES > 2
235 nsyscalls2,
236 #endif
237 };
238 static const struct_sysent *const sysent_vec[SUPPORTED_PERSONALITIES] = {
239 sysent0,
240 #if SUPPORTED_PERSONALITIES > 1
241 sysent1,
242 #endif
243 #if SUPPORTED_PERSONALITIES > 2
244 sysent2,
245 #endif
246 };
247
248 enum {
249 MAX_NSYSCALLS1 = (nsyscalls0
250 #if SUPPORTED_PERSONALITIES > 1
251 > nsyscalls1 ? nsyscalls0 : nsyscalls1
252 #endif
253 ),
254 MAX_NSYSCALLS2 = (MAX_NSYSCALLS1
255 #if SUPPORTED_PERSONALITIES > 2
256 > nsyscalls2 ? MAX_NSYSCALLS1 : nsyscalls2
257 #endif
258 ),
259 MAX_NSYSCALLS = MAX_NSYSCALLS2,
260 /* We are ready for arches with up to 255 signals,
261 * even though the largest known signo is on MIPS and it is 128.
262 * The number of existing syscalls on all arches is
263 * larger that 255 anyway, so it is just a pedantic matter.
264 */
265 MIN_QUALS = MAX_NSYSCALLS > 255 ? MAX_NSYSCALLS : 255
266 };
267
268 #if SUPPORTED_PERSONALITIES > 1
269 unsigned current_personality;
270
271 # ifndef current_wordsize
272 unsigned current_wordsize;
273 static const int personality_wordsize[SUPPORTED_PERSONALITIES] = {
274 PERSONALITY0_WORDSIZE,
275 PERSONALITY1_WORDSIZE,
276 # if SUPPORTED_PERSONALITIES > 2
277 PERSONALITY2_WORDSIZE,
278 # endif
279 };
280 # endif
281
282 void
set_personality(int personality)283 set_personality(int personality)
284 {
285 nsyscalls = nsyscall_vec[personality];
286 sysent = sysent_vec[personality];
287
288 switch (personality) {
289 case 0:
290 errnoent = errnoent0;
291 nerrnos = nerrnos0;
292 ioctlent = ioctlent0;
293 nioctlents = nioctlents0;
294 signalent = signalent0;
295 nsignals = nsignals0;
296 printers = &printers0;
297 break;
298
299 case 1:
300 errnoent = errnoent1;
301 nerrnos = nerrnos1;
302 ioctlent = ioctlent1;
303 nioctlents = nioctlents1;
304 signalent = signalent1;
305 nsignals = nsignals1;
306 printers = &printers1;
307 break;
308
309 # if SUPPORTED_PERSONALITIES > 2
310 case 2:
311 errnoent = errnoent2;
312 nerrnos = nerrnos2;
313 ioctlent = ioctlent2;
314 nioctlents = nioctlents2;
315 signalent = signalent2;
316 nsignals = nsignals2;
317 printers = &printers2;
318 break;
319 # endif
320 }
321
322 current_personality = personality;
323 # ifndef current_wordsize
324 current_wordsize = personality_wordsize[personality];
325 # endif
326 }
327
328 static void
update_personality(struct tcb * tcp,unsigned int personality)329 update_personality(struct tcb *tcp, unsigned int personality)
330 {
331 if (personality == current_personality)
332 return;
333 set_personality(personality);
334
335 if (personality == tcp->currpers)
336 return;
337 tcp->currpers = personality;
338
339 # undef PERSONALITY_NAMES
340 # if defined POWERPC64
341 # define PERSONALITY_NAMES {"64 bit", "32 bit"}
342 # elif defined X86_64
343 # define PERSONALITY_NAMES {"64 bit", "32 bit", "x32"}
344 # elif defined X32
345 # define PERSONALITY_NAMES {"x32", "32 bit"}
346 # elif defined AARCH64
347 # define PERSONALITY_NAMES {"64 bit", "32 bit"}
348 # elif defined TILE
349 # define PERSONALITY_NAMES {"64-bit", "32-bit"}
350 # endif
351 # ifdef PERSONALITY_NAMES
352 if (!qflag) {
353 static const char *const names[] = PERSONALITY_NAMES;
354 error_msg("[ Process PID=%d runs in %s mode. ]",
355 tcp->pid, names[personality]);
356 }
357 # endif
358 }
359 #endif
360
361 static int qual_syscall(), qual_signal(), qual_desc();
362
363 static const struct qual_options {
364 unsigned int bitflag;
365 const char *option_name;
366 int (*qualify)(const char *, int, int);
367 const char *argument_name;
368 } qual_options[] = {
369 { QUAL_TRACE, "trace", qual_syscall, "system call" },
370 { QUAL_TRACE, "t", qual_syscall, "system call" },
371 { QUAL_ABBREV, "abbrev", qual_syscall, "system call" },
372 { QUAL_ABBREV, "a", qual_syscall, "system call" },
373 { QUAL_VERBOSE, "verbose", qual_syscall, "system call" },
374 { QUAL_VERBOSE, "v", qual_syscall, "system call" },
375 { QUAL_RAW, "raw", qual_syscall, "system call" },
376 { QUAL_RAW, "x", qual_syscall, "system call" },
377 { QUAL_SIGNAL, "signal", qual_signal, "signal" },
378 { QUAL_SIGNAL, "signals", qual_signal, "signal" },
379 { QUAL_SIGNAL, "s", qual_signal, "signal" },
380 { QUAL_READ, "read", qual_desc, "descriptor" },
381 { QUAL_READ, "reads", qual_desc, "descriptor" },
382 { QUAL_READ, "r", qual_desc, "descriptor" },
383 { QUAL_WRITE, "write", qual_desc, "descriptor" },
384 { QUAL_WRITE, "writes", qual_desc, "descriptor" },
385 { QUAL_WRITE, "w", qual_desc, "descriptor" },
386 { 0, NULL, NULL, NULL },
387 };
388
389 static void
reallocate_qual(const unsigned int n)390 reallocate_qual(const unsigned int n)
391 {
392 unsigned p;
393 qualbits_t *qp;
394 for (p = 0; p < SUPPORTED_PERSONALITIES; p++) {
395 qp = qual_vec[p] = xreallocarray(qual_vec[p], n,
396 sizeof(qualbits_t));
397 memset(&qp[num_quals], 0, (n - num_quals) * sizeof(qualbits_t));
398 }
399 num_quals = n;
400 }
401
402 static void
qualify_one(const unsigned int n,unsigned int bitflag,const int not,const int pers)403 qualify_one(const unsigned int n, unsigned int bitflag, const int not, const int pers)
404 {
405 int p;
406
407 if (num_quals <= n)
408 reallocate_qual(n + 1);
409
410 for (p = 0; p < SUPPORTED_PERSONALITIES; p++) {
411 if (pers == p || pers < 0) {
412 if (not)
413 qual_vec[p][n] &= ~bitflag;
414 else
415 qual_vec[p][n] |= bitflag;
416 }
417 }
418 }
419
420 static int
qual_syscall(const char * s,const unsigned int bitflag,const int not)421 qual_syscall(const char *s, const unsigned int bitflag, const int not)
422 {
423 int p;
424 unsigned int i;
425 int rc = -1;
426
427 if (*s >= '0' && *s <= '9') {
428 i = string_to_uint(s);
429 if (i >= MAX_NSYSCALLS)
430 return -1;
431 qualify_one(i, bitflag, not, -1);
432 return 0;
433 }
434
435 for (p = 0; p < SUPPORTED_PERSONALITIES; p++) {
436 for (i = 0; i < nsyscall_vec[p]; i++) {
437 if (sysent_vec[p][i].sys_name
438 && strcmp(s, sysent_vec[p][i].sys_name) == 0
439 ) {
440 qualify_one(i, bitflag, not, p);
441 rc = 0;
442 }
443 }
444 }
445
446 return rc;
447 }
448
449 static int
qual_signal(const char * s,const unsigned int bitflag,const int not)450 qual_signal(const char *s, const unsigned int bitflag, const int not)
451 {
452 unsigned int i;
453
454 if (*s >= '0' && *s <= '9') {
455 int signo = string_to_uint(s);
456 if (signo < 0 || signo > 255)
457 return -1;
458 qualify_one(signo, bitflag, not, -1);
459 return 0;
460 }
461 if (strncasecmp(s, "SIG", 3) == 0)
462 s += 3;
463 for (i = 0; i <= NSIG; i++) {
464 if (strcasecmp(s, signame(i) + 3) == 0) {
465 qualify_one(i, bitflag, not, -1);
466 return 0;
467 }
468 }
469 return -1;
470 }
471
472 static int
qual_desc(const char * s,const unsigned int bitflag,const int not)473 qual_desc(const char *s, const unsigned int bitflag, const int not)
474 {
475 if (*s >= '0' && *s <= '9') {
476 int desc = string_to_uint(s);
477 if (desc < 0 || desc > 0x7fff) /* paranoia */
478 return -1;
479 qualify_one(desc, bitflag, not, -1);
480 return 0;
481 }
482 return -1;
483 }
484
485 static int
lookup_class(const char * s)486 lookup_class(const char *s)
487 {
488 if (strcmp(s, "file") == 0)
489 return TRACE_FILE;
490 if (strcmp(s, "ipc") == 0)
491 return TRACE_IPC;
492 if (strcmp(s, "network") == 0)
493 return TRACE_NETWORK;
494 if (strcmp(s, "process") == 0)
495 return TRACE_PROCESS;
496 if (strcmp(s, "signal") == 0)
497 return TRACE_SIGNAL;
498 if (strcmp(s, "desc") == 0)
499 return TRACE_DESC;
500 if (strcmp(s, "memory") == 0)
501 return TRACE_MEMORY;
502 return -1;
503 }
504
505 void
qualify(const char * s)506 qualify(const char *s)
507 {
508 const struct qual_options *opt;
509 char *copy;
510 const char *p;
511 int not;
512 unsigned int i;
513
514 if (num_quals == 0)
515 reallocate_qual(MIN_QUALS);
516
517 opt = &qual_options[0];
518 for (i = 0; (p = qual_options[i].option_name); i++) {
519 unsigned int len = strlen(p);
520 if (strncmp(s, p, len) == 0 && s[len] == '=') {
521 opt = &qual_options[i];
522 s += len + 1;
523 break;
524 }
525 }
526 not = 0;
527 if (*s == '!') {
528 not = 1;
529 s++;
530 }
531 if (strcmp(s, "none") == 0) {
532 not = 1 - not;
533 s = "all";
534 }
535 if (strcmp(s, "all") == 0) {
536 for (i = 0; i < num_quals; i++) {
537 qualify_one(i, opt->bitflag, not, -1);
538 }
539 return;
540 }
541 for (i = 0; i < num_quals; i++) {
542 qualify_one(i, opt->bitflag, !not, -1);
543 }
544 copy = xstrdup(s);
545 for (p = strtok(copy, ","); p; p = strtok(NULL, ",")) {
546 int n;
547 if (opt->bitflag == QUAL_TRACE && (n = lookup_class(p)) > 0) {
548 unsigned pers;
549 for (pers = 0; pers < SUPPORTED_PERSONALITIES; pers++) {
550 for (i = 0; i < nsyscall_vec[pers]; i++)
551 if (sysent_vec[pers][i].sys_flags & n)
552 qualify_one(i, opt->bitflag, not, pers);
553 }
554 continue;
555 }
556 if (opt->qualify(p, opt->bitflag, not)) {
557 error_msg_and_die("invalid %s '%s'",
558 opt->argument_name, p);
559 }
560 }
561 free(copy);
562 return;
563 }
564
565 #ifdef SYS_socket_subcall
566 static void
decode_socket_subcall(struct tcb * tcp)567 decode_socket_subcall(struct tcb *tcp)
568 {
569 unsigned long addr;
570 unsigned int n;
571
572 if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= SYS_socket_nsubcalls)
573 return;
574
575 tcp->scno = SYS_socket_subcall + tcp->u_arg[0];
576 tcp->qual_flg = qual_flags[tcp->scno];
577 tcp->s_ent = &sysent[tcp->scno];
578 addr = tcp->u_arg[1];
579 n = tcp->s_ent->nargs;
580 if (sizeof(tcp->u_arg[0]) == current_wordsize) {
581 memset(tcp->u_arg, 0, n * sizeof(tcp->u_arg[0]));
582 (void) umoven(tcp, addr, n * sizeof(tcp->u_arg[0]), tcp->u_arg);
583 } else {
584 unsigned int args[n];
585 unsigned int i;
586
587 memset(args, 0, sizeof(args));
588 (void) umove(tcp, addr, &args);
589 for (i = 0; i < n; ++i)
590 tcp->u_arg[i] = args[i];
591 }
592 }
593 #endif
594
595 #ifdef SYS_ipc_subcall
596 static void
decode_ipc_subcall(struct tcb * tcp)597 decode_ipc_subcall(struct tcb *tcp)
598 {
599 unsigned int i, n;
600
601 if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= SYS_ipc_nsubcalls)
602 return;
603
604 tcp->scno = SYS_ipc_subcall + tcp->u_arg[0];
605 tcp->qual_flg = qual_flags[tcp->scno];
606 tcp->s_ent = &sysent[tcp->scno];
607 n = tcp->s_ent->nargs;
608 for (i = 0; i < n; i++)
609 tcp->u_arg[i] = tcp->u_arg[i + 1];
610 }
611 #endif
612
613 #ifdef LINUX_MIPSO32
614 static void
decode_mips_subcall(struct tcb * tcp)615 decode_mips_subcall(struct tcb *tcp)
616 {
617 if (!SCNO_IS_VALID(tcp->u_arg[0]))
618 return;
619 tcp->scno = tcp->u_arg[0];
620 tcp->qual_flg = qual_flags[tcp->scno];
621 tcp->s_ent = &sysent[tcp->scno];
622 memmove(&tcp->u_arg[0], &tcp->u_arg[1],
623 sizeof(tcp->u_arg) - sizeof(tcp->u_arg[0]));
624 /*
625 * Fetching the last arg of 7-arg syscalls (fadvise64_64
626 * and sync_file_range) would require additional code,
627 * see linux/mips/get_syscall_args.c
628 */
629 }
630
SYS_FUNC(syscall)631 SYS_FUNC(syscall)
632 {
633 return printargs(tcp);
634 }
635 #endif
636
637 int
printargs(struct tcb * tcp)638 printargs(struct tcb *tcp)
639 {
640 if (entering(tcp)) {
641 int i;
642 int n = tcp->s_ent->nargs;
643 for (i = 0; i < n; i++)
644 tprintf("%s%#lx", i ? ", " : "", tcp->u_arg[i]);
645 }
646 return 0;
647 }
648
649 int
printargs_lu(struct tcb * tcp)650 printargs_lu(struct tcb *tcp)
651 {
652 if (entering(tcp)) {
653 int i;
654 int n = tcp->s_ent->nargs;
655 for (i = 0; i < n; i++)
656 tprintf("%s%lu", i ? ", " : "", tcp->u_arg[i]);
657 }
658 return 0;
659 }
660
661 int
printargs_ld(struct tcb * tcp)662 printargs_ld(struct tcb *tcp)
663 {
664 if (entering(tcp)) {
665 int i;
666 int n = tcp->s_ent->nargs;
667 for (i = 0; i < n; i++)
668 tprintf("%s%ld", i ? ", " : "", tcp->u_arg[i]);
669 }
670 return 0;
671 }
672
673 static void
dumpio(struct tcb * tcp)674 dumpio(struct tcb *tcp)
675 {
676 int sen;
677
678 if (syserror(tcp))
679 return;
680 if ((unsigned long) tcp->u_arg[0] >= num_quals)
681 return;
682 sen = tcp->s_ent->sen;
683 if (SEN_printargs == sen)
684 return;
685 if (qual_flags[tcp->u_arg[0]] & QUAL_READ) {
686 switch (sen) {
687 case SEN_read:
688 case SEN_pread:
689 case SEN_recv:
690 case SEN_recvfrom:
691 dumpstr(tcp, tcp->u_arg[1], tcp->u_rval);
692 return;
693 case SEN_readv:
694 dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
695 return;
696 case SEN_recvmsg:
697 dumpiov_in_msghdr(tcp, tcp->u_arg[1]);
698 return;
699 case SEN_recvmmsg:
700 dumpiov_in_mmsghdr(tcp, tcp->u_arg[1]);
701 return;
702 }
703 }
704 if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE) {
705 switch (sen) {
706 case SEN_write:
707 case SEN_pwrite:
708 case SEN_send:
709 case SEN_sendto:
710 dumpstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
711 break;
712 case SEN_writev:
713 dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
714 break;
715 case SEN_sendmsg:
716 dumpiov_in_msghdr(tcp, tcp->u_arg[1]);
717 break;
718 case SEN_sendmmsg:
719 dumpiov_in_mmsghdr(tcp, tcp->u_arg[1]);
720 break;
721 }
722 }
723 }
724
725 /*
726 * Shuffle syscall numbers so that we don't have huge gaps in syscall table.
727 * The shuffling should be an involution: shuffle_scno(shuffle_scno(n)) == n.
728 */
729 #if defined(ARM) || defined(AARCH64) /* So far only 32-bit ARM needs this */
730 static long
shuffle_scno(unsigned long scno)731 shuffle_scno(unsigned long scno)
732 {
733 if (scno < ARM_FIRST_SHUFFLED_SYSCALL)
734 return scno;
735
736 /* __ARM_NR_cmpxchg? Swap with LAST_ORDINARY+1 */
737 if (scno == ARM_FIRST_SHUFFLED_SYSCALL)
738 return 0x000ffff0;
739 if (scno == 0x000ffff0)
740 return ARM_FIRST_SHUFFLED_SYSCALL;
741
742 #define ARM_SECOND_SHUFFLED_SYSCALL (ARM_FIRST_SHUFFLED_SYSCALL + 1)
743 /*
744 * Is it ARM specific syscall?
745 * Swap [0x000f0000, 0x000f0000 + LAST_SPECIAL] range
746 * with [SECOND_SHUFFLED, SECOND_SHUFFLED + LAST_SPECIAL] range.
747 */
748 if (scno >= 0x000f0000 &&
749 scno <= 0x000f0000 + ARM_LAST_SPECIAL_SYSCALL) {
750 return scno - 0x000f0000 + ARM_SECOND_SHUFFLED_SYSCALL;
751 }
752 if (scno <= ARM_SECOND_SHUFFLED_SYSCALL + ARM_LAST_SPECIAL_SYSCALL) {
753 return scno + 0x000f0000 - ARM_SECOND_SHUFFLED_SYSCALL;
754 }
755
756 return scno;
757 }
758 #else
759 # define shuffle_scno(scno) ((long)(scno))
760 #endif
761
762 const char *
syscall_name(long scno)763 syscall_name(long scno)
764 {
765 static char buf[sizeof("syscall_%lu") + sizeof(long)*3];
766
767 if (SCNO_IS_VALID(scno))
768 return sysent[scno].sys_name;
769 else {
770 sprintf(buf, "syscall_%lu", shuffle_scno(scno));
771 return buf;
772 }
773 }
774
775 static long get_regs_error;
776
777 void
clear_regs(void)778 clear_regs(void)
779 {
780 get_regs_error = -1;
781 }
782
783 static int get_syscall_args(struct tcb *);
784 static int get_syscall_result(struct tcb *);
785 static int arch_get_scno(struct tcb *tcp);
786 static void get_error(struct tcb *, const bool);
787 #if defined X86_64 || defined POWERPC
788 static int getregs_old(pid_t);
789 #endif
790
791 static int
trace_syscall_entering(struct tcb * tcp)792 trace_syscall_entering(struct tcb *tcp)
793 {
794 int res, scno_good;
795
796 scno_good = res = get_scno(tcp);
797 if (res == 0)
798 return res;
799 if (res == 1)
800 res = get_syscall_args(tcp);
801
802 if (res != 1) {
803 printleader(tcp);
804 if (scno_good != 1)
805 tprints("????" /* anti-trigraph gap */ "(");
806 else if (tcp->qual_flg & UNDEFINED_SCNO)
807 tprintf("%s(", syscall_name(tcp->scno));
808 else
809 tprintf("%s(", tcp->s_ent->sys_name);
810 /*
811 * " <unavailable>" will be added later by the code which
812 * detects ptrace errors.
813 */
814 goto ret;
815 }
816
817 #ifdef LINUX_MIPSO32
818 if (SEN_syscall == tcp->s_ent->sen)
819 decode_mips_subcall(tcp);
820 #endif
821
822 if ( SEN_execve == tcp->s_ent->sen
823 # if defined(SPARC) || defined(SPARC64)
824 || SEN_execv == tcp->s_ent->sen
825 # endif
826 ) {
827 hide_log_until_execve = 0;
828 }
829
830 #if defined(SYS_socket_subcall) || defined(SYS_ipc_subcall)
831 switch (tcp->s_ent->sen) {
832 # ifdef SYS_socket_subcall
833 case SEN_socketcall:
834 decode_socket_subcall(tcp);
835 break;
836 # endif
837 # ifdef SYS_ipc_subcall
838 case SEN_ipc:
839 decode_ipc_subcall(tcp);
840 break;
841 # endif
842 }
843 #endif
844
845 if (!(tcp->qual_flg & QUAL_TRACE)
846 || (tracing_paths && !pathtrace_match(tcp))
847 ) {
848 tcp->flags |= TCB_INSYSCALL | TCB_FILTERED;
849 tcp->sys_func_rval = 0;
850 return 0;
851 }
852
853 tcp->flags &= ~TCB_FILTERED;
854
855 if (cflag == CFLAG_ONLY_STATS || hide_log_until_execve) {
856 res = 0;
857 goto ret;
858 }
859
860 #ifdef USE_LIBUNWIND
861 if (stack_trace_enabled) {
862 if (tcp->s_ent->sys_flags & STACKTRACE_CAPTURE_ON_ENTER)
863 unwind_capture_stacktrace(tcp);
864 }
865 #endif
866
867 printleader(tcp);
868 if (tcp->qual_flg & UNDEFINED_SCNO)
869 tprintf("%s(", syscall_name(tcp->scno));
870 else
871 tprintf("%s(", tcp->s_ent->sys_name);
872 if ((tcp->qual_flg & QUAL_RAW) && SEN_exit != tcp->s_ent->sen)
873 res = printargs(tcp);
874 else
875 res = tcp->s_ent->sys_func(tcp);
876
877 fflush(tcp->outf);
878 ret:
879 tcp->flags |= TCB_INSYSCALL;
880 tcp->sys_func_rval = res;
881 /* Measure the entrance time as late as possible to avoid errors. */
882 if (Tflag || cflag)
883 gettimeofday(&tcp->etime, NULL);
884 return res;
885 }
886
887 static int
trace_syscall_exiting(struct tcb * tcp)888 trace_syscall_exiting(struct tcb *tcp)
889 {
890 int sys_res;
891 struct timeval tv;
892 int res;
893 long u_error;
894
895 /* Measure the exit time as early as possible to avoid errors. */
896 if (Tflag || cflag)
897 gettimeofday(&tv, NULL);
898
899 #ifdef USE_LIBUNWIND
900 if (stack_trace_enabled) {
901 if (tcp->s_ent->sys_flags & STACKTRACE_INVALIDATE_CACHE)
902 unwind_cache_invalidate(tcp);
903 }
904 #endif
905
906 #if SUPPORTED_PERSONALITIES > 1
907 update_personality(tcp, tcp->currpers);
908 #endif
909 res = (get_regs_error ? -1 : get_syscall_result(tcp));
910 if (filtered(tcp) || hide_log_until_execve)
911 goto ret;
912
913 if (cflag) {
914 count_syscall(tcp, &tv);
915 if (cflag == CFLAG_ONLY_STATS) {
916 goto ret;
917 }
918 }
919
920 /* If not in -ff mode, and printing_tcp != tcp,
921 * then the log currently does not end with output
922 * of _our syscall entry_, but with something else.
923 * We need to say which syscall's return is this.
924 *
925 * Forced reprinting via TCB_REPRINT is used only by
926 * "strace -ff -oLOG test/threaded_execve" corner case.
927 * It's the only case when -ff mode needs reprinting.
928 */
929 if ((followfork < 2 && printing_tcp != tcp) || (tcp->flags & TCB_REPRINT)) {
930 tcp->flags &= ~TCB_REPRINT;
931 printleader(tcp);
932 if (tcp->qual_flg & UNDEFINED_SCNO)
933 tprintf("<... %s resumed> ", syscall_name(tcp->scno));
934 else
935 tprintf("<... %s resumed> ", tcp->s_ent->sys_name);
936 }
937 printing_tcp = tcp;
938
939 tcp->s_prev_ent = NULL;
940 if (res != 1) {
941 /* There was error in one of prior ptrace ops */
942 tprints(") ");
943 tabto();
944 tprints("= ? <unavailable>\n");
945 line_ended();
946 tcp->flags &= ~TCB_INSYSCALL;
947 tcp->sys_func_rval = 0;
948 return res;
949 }
950 tcp->s_prev_ent = tcp->s_ent;
951
952 sys_res = 0;
953 if (tcp->qual_flg & QUAL_RAW) {
954 /* sys_res = printargs(tcp); - but it's nop on sysexit */
955 } else {
956 /* FIXME: not_failing_only (IOW, option -z) is broken:
957 * failure of syscall is known only after syscall return.
958 * Thus we end up with something like this on, say, ENOENT:
959 * open("doesnt_exist", O_RDONLY <unfinished ...>
960 * {next syscall decode}
961 * whereas the intended result is that open(...) line
962 * is not shown at all.
963 */
964 if (not_failing_only && tcp->u_error)
965 goto ret; /* ignore failed syscalls */
966 if (tcp->sys_func_rval & RVAL_DECODED)
967 sys_res = tcp->sys_func_rval;
968 else
969 sys_res = tcp->s_ent->sys_func(tcp);
970 }
971
972 tprints(") ");
973 tabto();
974 u_error = tcp->u_error;
975 if (tcp->qual_flg & QUAL_RAW) {
976 if (u_error)
977 tprintf("= -1 (errno %ld)", u_error);
978 else
979 tprintf("= %#lx", tcp->u_rval);
980 }
981 else if (!(sys_res & RVAL_NONE) && u_error) {
982 switch (u_error) {
983 /* Blocked signals do not interrupt any syscalls.
984 * In this case syscalls don't return ERESTARTfoo codes.
985 *
986 * Deadly signals set to SIG_DFL interrupt syscalls
987 * and kill the process regardless of which of the codes below
988 * is returned by the interrupted syscall.
989 * In some cases, kernel forces a kernel-generated deadly
990 * signal to be unblocked and set to SIG_DFL (and thus cause
991 * death) if it is blocked or SIG_IGNed: for example, SIGSEGV
992 * or SIGILL. (The alternative is to leave process spinning
993 * forever on the faulty instruction - not useful).
994 *
995 * SIG_IGNed signals and non-deadly signals set to SIG_DFL
996 * (for example, SIGCHLD, SIGWINCH) interrupt syscalls,
997 * but kernel will always restart them.
998 */
999 case ERESTARTSYS:
1000 /* Most common type of signal-interrupted syscall exit code.
1001 * The system call will be restarted with the same arguments
1002 * if SA_RESTART is set; otherwise, it will fail with EINTR.
1003 */
1004 tprints("= ? ERESTARTSYS (To be restarted if SA_RESTART is set)");
1005 break;
1006 case ERESTARTNOINTR:
1007 /* Rare. For example, fork() returns this if interrupted.
1008 * SA_RESTART is ignored (assumed set): the restart is unconditional.
1009 */
1010 tprints("= ? ERESTARTNOINTR (To be restarted)");
1011 break;
1012 case ERESTARTNOHAND:
1013 /* pause(), rt_sigsuspend() etc use this code.
1014 * SA_RESTART is ignored (assumed not set):
1015 * syscall won't restart (will return EINTR instead)
1016 * even after signal with SA_RESTART set. However,
1017 * after SIG_IGN or SIG_DFL signal it will restart
1018 * (thus the name "restart only if has no handler").
1019 */
1020 tprints("= ? ERESTARTNOHAND (To be restarted if no handler)");
1021 break;
1022 case ERESTART_RESTARTBLOCK:
1023 /* Syscalls like nanosleep(), poll() which can't be
1024 * restarted with their original arguments use this
1025 * code. Kernel will execute restart_syscall() instead,
1026 * which changes arguments before restarting syscall.
1027 * SA_RESTART is ignored (assumed not set) similarly
1028 * to ERESTARTNOHAND. (Kernel can't honor SA_RESTART
1029 * since restart data is saved in "restart block"
1030 * in task struct, and if signal handler uses a syscall
1031 * which in turn saves another such restart block,
1032 * old data is lost and restart becomes impossible)
1033 */
1034 tprints("= ? ERESTART_RESTARTBLOCK (Interrupted by signal)");
1035 break;
1036 default:
1037 if ((unsigned long) u_error < nerrnos
1038 && errnoent[u_error])
1039 tprintf("= -1 %s (%s)", errnoent[u_error],
1040 strerror(u_error));
1041 else
1042 tprintf("= -1 ERRNO_%lu (%s)", u_error,
1043 strerror(u_error));
1044 break;
1045 }
1046 if ((sys_res & RVAL_STR) && tcp->auxstr)
1047 tprintf(" (%s)", tcp->auxstr);
1048 }
1049 else {
1050 if (sys_res & RVAL_NONE)
1051 tprints("= ?");
1052 else {
1053 switch (sys_res & RVAL_MASK) {
1054 case RVAL_HEX:
1055 #if SUPPORTED_PERSONALITIES > 1
1056 if (current_wordsize < sizeof(long))
1057 tprintf("= %#x",
1058 (unsigned int) tcp->u_rval);
1059 else
1060 #endif
1061 tprintf("= %#lx", tcp->u_rval);
1062 break;
1063 case RVAL_OCTAL:
1064 tprintf("= %#lo", tcp->u_rval);
1065 break;
1066 case RVAL_UDECIMAL:
1067 tprintf("= %lu", tcp->u_rval);
1068 break;
1069 case RVAL_DECIMAL:
1070 tprintf("= %ld", tcp->u_rval);
1071 break;
1072 case RVAL_FD:
1073 if (show_fd_path) {
1074 tprints("= ");
1075 printfd(tcp, tcp->u_rval);
1076 }
1077 else
1078 tprintf("= %ld", tcp->u_rval);
1079 break;
1080 #if defined(LINUX_MIPSN32) || defined(X32)
1081 /*
1082 case RVAL_LHEX:
1083 tprintf("= %#llx", tcp->u_lrval);
1084 break;
1085 case RVAL_LOCTAL:
1086 tprintf("= %#llo", tcp->u_lrval);
1087 break;
1088 */
1089 case RVAL_LUDECIMAL:
1090 tprintf("= %llu", tcp->u_lrval);
1091 break;
1092 /*
1093 case RVAL_LDECIMAL:
1094 tprintf("= %lld", tcp->u_lrval);
1095 break;
1096 */
1097 #endif
1098 default:
1099 error_msg("invalid rval format");
1100 break;
1101 }
1102 }
1103 if ((sys_res & RVAL_STR) && tcp->auxstr)
1104 tprintf(" (%s)", tcp->auxstr);
1105 }
1106 if (Tflag) {
1107 tv_sub(&tv, &tv, &tcp->etime);
1108 tprintf(" <%ld.%06ld>",
1109 (long) tv.tv_sec, (long) tv.tv_usec);
1110 }
1111 tprints("\n");
1112 dumpio(tcp);
1113 line_ended();
1114
1115 #ifdef USE_LIBUNWIND
1116 if (stack_trace_enabled)
1117 unwind_print_stacktrace(tcp);
1118 #endif
1119
1120 ret:
1121 tcp->flags &= ~TCB_INSYSCALL;
1122 tcp->sys_func_rval = 0;
1123 return 0;
1124 }
1125
1126 int
trace_syscall(struct tcb * tcp)1127 trace_syscall(struct tcb *tcp)
1128 {
1129 return exiting(tcp) ?
1130 trace_syscall_exiting(tcp) : trace_syscall_entering(tcp);
1131 }
1132
1133 bool
is_erestart(struct tcb * tcp)1134 is_erestart(struct tcb *tcp)
1135 {
1136 switch (tcp->u_error) {
1137 case ERESTARTSYS:
1138 case ERESTARTNOINTR:
1139 case ERESTARTNOHAND:
1140 case ERESTART_RESTARTBLOCK:
1141 return true;
1142 default:
1143 return false;
1144 }
1145 }
1146
1147 static int saved_u_error;
1148
1149 void
temporarily_clear_syserror(struct tcb * tcp)1150 temporarily_clear_syserror(struct tcb *tcp)
1151 {
1152 saved_u_error = tcp->u_error;
1153 tcp->u_error = 0;
1154 }
1155
1156 void
restore_cleared_syserror(struct tcb * tcp)1157 restore_cleared_syserror(struct tcb *tcp)
1158 {
1159 tcp->u_error = saved_u_error;
1160 }
1161
1162 #include "kernel_types.h"
1163
1164 /*
1165 * Check the syscall return value register value for whether it is
1166 * a negated errno code indicating an error, or a success return value.
1167 */
1168 static inline bool
is_negated_errno(kernel_ulong_t val)1169 is_negated_errno(kernel_ulong_t val)
1170 {
1171 /* Linux kernel defines MAX_ERRNO to 4095. */
1172 kernel_ulong_t max = -(kernel_long_t) 4095;
1173
1174 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
1175 if (current_wordsize < sizeof(val)) {
1176 val = (uint32_t) val;
1177 max = (uint32_t) max;
1178 }
1179 #elif defined X32
1180 /*
1181 * current_wordsize is 4 even in personality 0 (native X32)
1182 * but truncation _must not_ be done in it.
1183 * can't check current_wordsize here!
1184 */
1185 if (current_personality != 0) {
1186 val = (uint32_t) val;
1187 max = (uint32_t) max;
1188 }
1189 #endif
1190
1191 return val >= max;
1192 }
1193
1194 #include "arch_regs.c"
1195
1196 #ifdef HAVE_GETRVAL2
1197 # include "arch_getrval2.c"
1198 #endif
1199
1200 void
print_pc(struct tcb * tcp)1201 print_pc(struct tcb *tcp)
1202 {
1203 #if defined ARCH_PC_REG
1204 # define ARCH_GET_PC 0
1205 #elif defined ARCH_PC_PEEK_ADDR
1206 long pc;
1207 # define ARCH_PC_REG pc
1208 # define ARCH_GET_PC upeek(tcp->pid, ARCH_PC_PEEK_ADDR, &pc)
1209 #else
1210 # error Neither ARCH_PC_REG nor ARCH_PC_PEEK_ADDR is defined
1211 #endif
1212 if (get_regs_error || ARCH_GET_PC)
1213 tprints(current_wordsize == 4 ? "[????????] "
1214 : "[????????????????] ");
1215 else
1216 tprintf(current_wordsize == 4 ? "[%08lx] " : "[%016lx] ",
1217 (unsigned long) ARCH_PC_REG);
1218 }
1219
1220 #if defined ARCH_REGS_FOR_GETREGSET
1221 static long
get_regset(pid_t pid)1222 get_regset(pid_t pid)
1223 {
1224 # ifdef ARCH_IOVEC_FOR_GETREGSET
1225 /* variable iovec */
1226 ARCH_IOVEC_FOR_GETREGSET.iov_len = sizeof(ARCH_REGS_FOR_GETREGSET);
1227 return ptrace(PTRACE_GETREGSET, pid, NT_PRSTATUS,
1228 &ARCH_IOVEC_FOR_GETREGSET);
1229 # else
1230 /* constant iovec */
1231 static struct iovec io = {
1232 .iov_base = &ARCH_REGS_FOR_GETREGSET,
1233 .iov_len = sizeof(ARCH_REGS_FOR_GETREGSET)
1234 };
1235 return ptrace(PTRACE_GETREGSET, pid, NT_PRSTATUS, &io);
1236
1237 # endif
1238 }
1239 #endif /* ARCH_REGS_FOR_GETREGSET */
1240
1241 void
get_regs(pid_t pid)1242 get_regs(pid_t pid)
1243 {
1244 #undef USE_GET_SYSCALL_RESULT_REGS
1245 #ifdef ARCH_REGS_FOR_GETREGSET
1246 # ifdef X86_64
1247 /* Try PTRACE_GETREGSET first, fallback to PTRACE_GETREGS. */
1248 static int getregset_support;
1249
1250 if (getregset_support >= 0) {
1251 get_regs_error = get_regset(pid);
1252 if (getregset_support > 0)
1253 return;
1254 if (get_regs_error >= 0) {
1255 getregset_support = 1;
1256 return;
1257 }
1258 if (errno == EPERM || errno == ESRCH)
1259 return;
1260 getregset_support = -1;
1261 }
1262 get_regs_error = getregs_old(pid);
1263 # else /* !X86_64 */
1264 /* Assume that PTRACE_GETREGSET works. */
1265 get_regs_error = get_regset(pid);
1266 # endif
1267 #elif defined ARCH_REGS_FOR_GETREGS
1268 # if defined SPARC || defined SPARC64
1269 /* SPARC systems have the meaning of data and addr reversed */
1270 get_regs_error = ptrace(PTRACE_GETREGS, pid, (char *)&ARCH_REGS_FOR_GETREGS, 0);
1271 # elif defined POWERPC
1272 static bool old_kernel = 0;
1273 if (old_kernel)
1274 goto old;
1275 get_regs_error = ptrace(PTRACE_GETREGS, pid, NULL, &ARCH_REGS_FOR_GETREGS);
1276 if (get_regs_error && errno == EIO) {
1277 old_kernel = 1;
1278 old:
1279 get_regs_error = getregs_old(pid);
1280 }
1281 # else
1282 /* Assume that PTRACE_GETREGS works. */
1283 get_regs_error = ptrace(PTRACE_GETREGS, pid, NULL, &ARCH_REGS_FOR_GETREGS);
1284 # endif
1285
1286 #else /* !ARCH_REGS_FOR_GETREGSET && !ARCH_REGS_FOR_GETREGS */
1287 # define USE_GET_SYSCALL_RESULT_REGS 1
1288 # warning get_regs is not implemented for this architecture yet
1289 get_regs_error = 0;
1290 #endif
1291 }
1292
1293 /*
1294 * Returns:
1295 * 0: "ignore this ptrace stop", bail out of trace_syscall_entering() silently.
1296 * 1: ok, continue in trace_syscall_entering().
1297 * other: error, trace_syscall_entering() should print error indicator
1298 * ("????" etc) and bail out.
1299 */
1300 int
get_scno(struct tcb * tcp)1301 get_scno(struct tcb *tcp)
1302 {
1303 if (get_regs_error)
1304 return -1;
1305
1306 int rc = arch_get_scno(tcp);
1307 if (rc != 1)
1308 return rc;
1309
1310 if (SCNO_IS_VALID(tcp->scno)) {
1311 tcp->s_ent = &sysent[tcp->scno];
1312 tcp->qual_flg = qual_flags[tcp->scno];
1313 } else {
1314 static const struct_sysent unknown = {
1315 .nargs = MAX_ARGS,
1316 .sys_flags = 0,
1317 .sys_func = printargs,
1318 .sys_name = "system call",
1319 };
1320 tcp->s_ent = &unknown;
1321 tcp->qual_flg = UNDEFINED_SCNO | QUAL_RAW | DEFAULT_QUAL_FLAGS;
1322 if (debug_flag)
1323 error_msg("pid %d invalid syscall %ld", tcp->pid, tcp->scno);
1324 }
1325 return 1;
1326 }
1327
1328 #ifdef USE_GET_SYSCALL_RESULT_REGS
1329 static int get_syscall_result_regs(struct tcb *);
1330 #endif
1331
1332 /* Returns:
1333 * 1: ok, continue in trace_syscall_exiting().
1334 * -1: error, trace_syscall_exiting() should print error indicator
1335 * ("????" etc) and bail out.
1336 */
1337 static int
get_syscall_result(struct tcb * tcp)1338 get_syscall_result(struct tcb *tcp)
1339 {
1340 #ifdef USE_GET_SYSCALL_RESULT_REGS
1341 if (get_syscall_result_regs(tcp))
1342 return -1;
1343 #endif
1344 tcp->u_error = 0;
1345 get_error(tcp, !(tcp->s_ent->sys_flags & SYSCALL_NEVER_FAILS));
1346
1347 return 1;
1348 }
1349
1350 #include "get_scno.c"
1351 #include "get_syscall_args.c"
1352 #ifdef USE_GET_SYSCALL_RESULT_REGS
1353 # include "get_syscall_result.c"
1354 #endif
1355 #include "get_error.c"
1356 #if defined X86_64 || defined POWERPC
1357 # include "getregs_old.c"
1358 #endif
1359