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
|
/*
* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
* Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Linux for s390 port by D.J. Barrow
* <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "defs.h"
#include <signal.h>
#ifndef NSIG
# warning NSIG is not defined, using 32
# define NSIG 32
#elif NSIG < 32
# error NSIG < 32
#endif
/* The libc headers do not define this constant since it should only be
used by the implementation. So we define it here. */
#ifndef SA_RESTORER
# ifdef ASM_SA_RESTORER
# define SA_RESTORER ASM_SA_RESTORER
# endif
#endif
/*
* Some architectures define SA_RESTORER in their headers,
* but do not actually have sa_restorer.
*
* Some architectures, otherwise, do not define SA_RESTORER in their headers,
* but actually have sa_restorer.
*/
#ifdef SA_RESTORER
# if defined HPPA || defined IA64
# define HAVE_SA_RESTORER 0
# else
# define HAVE_SA_RESTORER 1
# endif
#else /* !SA_RESTORER */
# if defined SPARC || defined SPARC64 || defined M68K
# define HAVE_SA_RESTORER 1
# else
# define HAVE_SA_RESTORER 0
# endif
#endif
#include "xlat/sa_handler_values.h"
#include "xlat/sigact_flags.h"
#include "xlat/sigprocmaskcmds.h"
/* Anonymous realtime signals. */
#ifndef ASM_SIGRTMIN
/* Linux kernel >= 3.18 defines SIGRTMIN to 32 on all architectures. */
# define ASM_SIGRTMIN 32
#endif
#ifndef ASM_SIGRTMAX
/* Under glibc 2.1, SIGRTMAX et al are functions, but __SIGRTMAX is a
constant. This is what we want. Otherwise, just use SIGRTMAX. */
# ifdef SIGRTMAX
# ifndef __SIGRTMAX
# define __SIGRTMAX SIGRTMAX
# endif
# endif
# ifdef __SIGRTMAX
# define ASM_SIGRTMAX __SIGRTMAX
# endif
#endif
/* Note on the size of sigset_t:
*
* In glibc, sigset_t is an array with space for 1024 bits (!),
* even though all arches supported by Linux have only 64 signals
* except MIPS, which has 128. IOW, it is 128 bytes long.
*
* In-kernel sigset_t is sized correctly (it is either 64 or 128 bit long).
* However, some old syscall return only 32 lower bits (one word).
* Example: sys_sigpending vs sys_rt_sigpending.
*
* Be aware of this fact when you try to
* memcpy(&tcp->u_arg[1], &something, sizeof(sigset_t))
* - sizeof(sigset_t) is much bigger than you think,
* it may overflow tcp->u_arg[] array, and it may try to copy more data
* than is really available in <something>.
* Similarly,
* umoven(tcp, addr, sizeof(sigset_t), &sigset)
* may be a bad idea: it'll try to read much more data than needed
* to fetch a sigset_t.
* Use (NSIG / 8) as a size instead.
*/
static const char *
get_sa_handler_str(unsigned long handler)
{
return xlookup(sa_handler_values, handler);
}
static void
print_sa_handler(unsigned long handler)
{
const char *sa_handler_str = get_sa_handler_str(handler);
if (sa_handler_str)
tprints(sa_handler_str);
else
printaddr(handler);
}
const char *
signame(const int sig)
{
static char buf[sizeof("SIGRT_%u") + sizeof(int)*3];
if (sig >= 0) {
const unsigned int s = sig;
if (s < nsignals)
return signalent[s];
#ifdef ASM_SIGRTMAX
if (s >= ASM_SIGRTMIN && s <= (unsigned int) ASM_SIGRTMAX) {
sprintf(buf, "SIGRT_%u", s - ASM_SIGRTMIN);
return buf;
}
#endif
}
sprintf(buf, "%d", sig);
return buf;
}
static unsigned int
popcount32(const uint32_t *a, unsigned int size)
{
unsigned int count = 0;
for (; size; ++a, --size) {
uint32_t x = *a;
#ifdef HAVE___BUILTIN_POPCOUNT
count += __builtin_popcount(x);
#else
for (; x; ++count)
x &= x - 1;
#endif
}
return count;
}
const char *
sprintsigmask_n(const char *prefix, const void *sig_mask, unsigned int bytes)
{
/*
* The maximum number of signal names to be printed is NSIG * 2 / 3.
* Most of signal names have length 7,
* average length of signal names is less than 7.
* The length of prefix string does not exceed 16.
*/
static char outstr[128 + 8 * (NSIG * 2 / 3)];
char *s;
const uint32_t *mask;
uint32_t inverted_mask[NSIG / 32];
unsigned int size;
int i;
char sep;
s = stpcpy(outstr, prefix);
mask = sig_mask;
/* length of signal mask in 4-byte words */
size = (bytes >= NSIG / 8) ? NSIG / 32 : (bytes + 3) / 4;
/* check whether 2/3 or more bits are set */
if (popcount32(mask, size) >= size * 32 * 2 / 3) {
/* show those signals that are NOT in the mask */
unsigned int j;
for (j = 0; j < size; ++j)
inverted_mask[j] = ~mask[j];
mask = inverted_mask;
*s++ = '~';
}
sep = '[';
for (i = 0; (i = next_set_bit(mask, i, size * 32)) >= 0; ) {
++i;
*s++ = sep;
if ((unsigned) i < nsignals) {
s = stpcpy(s, signalent[i] + 3);
}
#ifdef ASM_SIGRTMAX
else if (i >= ASM_SIGRTMIN && i <= ASM_SIGRTMAX) {
s += sprintf(s, "RT_%u", i - ASM_SIGRTMIN);
}
#endif
else {
s += sprintf(s, "%u", i);
}
sep = ' ';
}
if (sep == '[')
*s++ = sep;
*s++ = ']';
*s = '\0';
return outstr;
}
#define sprintsigmask_val(prefix, mask) \
sprintsigmask_n((prefix), &(mask), sizeof(mask))
#define tprintsigmask_val(prefix, mask) \
tprints(sprintsigmask_n((prefix), &(mask), sizeof(mask)))
void
printsignal(int nr)
{
tprints(signame(nr));
}
static void
print_sigset_addr_len_limit(struct tcb *tcp, long addr, long len, long min_len)
{
/*
* Here len is usually equal to NSIG / 8 or current_wordsize.
* But we code this defensively:
*/
if (len < min_len || len > NSIG / 8) {
printaddr(addr);
return;
}
int mask[NSIG / 8 / sizeof(int)] = {};
if (umoven_or_printaddr(tcp, addr, len, mask))
return;
tprints(sprintsigmask_n("", mask, len));
}
void
print_sigset_addr_len(struct tcb *tcp, long addr, long len)
{
print_sigset_addr_len_limit(tcp, addr, len, current_wordsize);
}
SYS_FUNC(sigsetmask)
{
if (entering(tcp)) {
tprintsigmask_val("", tcp->u_arg[0]);
}
else if (!syserror(tcp)) {
tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval);
return RVAL_HEX | RVAL_STR;
}
return 0;
}
struct old_sigaction {
/* sa_handler may be a libc #define, need to use other name: */
#ifdef MIPS
unsigned int sa_flags;
void (*__sa_handler)(int);
/* Kernel treats sa_mask as an array of longs. */
unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
#else
void (*__sa_handler)(int);
unsigned long sa_mask;
unsigned long sa_flags;
#endif /* !MIPS */
#if HAVE_SA_RESTORER
void (*sa_restorer)(void);
#endif
};
struct old_sigaction32 {
/* sa_handler may be a libc #define, need to use other name: */
uint32_t __sa_handler;
uint32_t sa_mask;
uint32_t sa_flags;
#if HAVE_SA_RESTORER
uint32_t sa_restorer;
#endif
};
static void
decode_old_sigaction(struct tcb *tcp, long addr)
{
struct old_sigaction sa;
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
if (current_wordsize != sizeof(sa.__sa_handler) && current_wordsize == 4) {
struct old_sigaction32 sa32;
if (umove_or_printaddr(tcp, addr, &sa32))
return;
memset(&sa, 0, sizeof(sa));
sa.__sa_handler = (void*)(uintptr_t)sa32.__sa_handler;
sa.sa_flags = sa32.sa_flags;
#if HAVE_SA_RESTORER && defined SA_RESTORER
sa.sa_restorer = (void*)(uintptr_t)sa32.sa_restorer;
#endif
sa.sa_mask = sa32.sa_mask;
} else
#endif
if (umove_or_printaddr(tcp, addr, &sa))
return;
/* Architectures using function pointers, like
* hppa, may need to manipulate the function pointer
* to compute the result of a comparison. However,
* the __sa_handler function pointer exists only in
* the address space of the traced process, and can't
* be manipulated by strace. In order to prevent the
* compiler from generating code to manipulate
* __sa_handler we cast the function pointers to long. */
tprints("{sa_handler=");
print_sa_handler((unsigned long) sa.__sa_handler);
tprints(", sa_mask=");
#ifdef MIPS
tprintsigmask_addr("", sa.sa_mask);
#else
tprintsigmask_val("", sa.sa_mask);
#endif
tprints(", sa_flags=");
printflags(sigact_flags, sa.sa_flags, "SA_???");
#if HAVE_SA_RESTORER && defined SA_RESTORER
if (sa.sa_flags & SA_RESTORER)
tprintf(", sa_restorer=%p", sa.sa_restorer);
#endif
tprints("}");
}
SYS_FUNC(sigaction)
{
if (entering(tcp)) {
printsignal(tcp->u_arg[0]);
tprints(", ");
decode_old_sigaction(tcp, tcp->u_arg[1]);
tprints(", ");
} else
decode_old_sigaction(tcp, tcp->u_arg[2]);
return 0;
}
SYS_FUNC(signal)
{
if (entering(tcp)) {
printsignal(tcp->u_arg[0]);
tprints(", ");
print_sa_handler(tcp->u_arg[1]);
return 0;
} else if (!syserror(tcp)) {
tcp->auxstr = get_sa_handler_str(tcp->u_rval);
return RVAL_HEX | RVAL_STR;
}
return 0;
}
SYS_FUNC(siggetmask)
{
if (exiting(tcp)) {
tcp->auxstr = sprintsigmask_val("mask ", tcp->u_rval);
}
return RVAL_HEX | RVAL_STR;
}
SYS_FUNC(sigsuspend)
{
tprintsigmask_val("", tcp->u_arg[2]);
return RVAL_DECODED;
}
/* "Old" sigprocmask, which operates with word-sized signal masks */
SYS_FUNC(sigprocmask)
{
# ifdef ALPHA
if (entering(tcp)) {
/*
* Alpha/OSF is different: it doesn't pass in two pointers,
* but rather passes in the new bitmask as an argument and
* then returns the old bitmask. This "works" because we
* only have 64 signals to worry about. If you want more,
* use of the rt_sigprocmask syscall is required.
* Alpha:
* old = osf_sigprocmask(how, new);
* Everyone else:
* ret = sigprocmask(how, &new, &old, ...);
*/
printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
tprintsigmask_val(", ", tcp->u_arg[1]);
}
else if (!syserror(tcp)) {
tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval);
return RVAL_HEX | RVAL_STR;
}
# else /* !ALPHA */
if (entering(tcp)) {
printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
tprints(", ");
print_sigset_addr_len(tcp, tcp->u_arg[1], current_wordsize);
tprints(", ");
}
else {
print_sigset_addr_len(tcp, tcp->u_arg[2], current_wordsize);
}
# endif /* !ALPHA */
return 0;
}
SYS_FUNC(kill)
{
tprintf("%d, %s",
(int) tcp->u_arg[0],
signame(tcp->u_arg[1]));
return RVAL_DECODED;
}
SYS_FUNC(tgkill)
{
tprintf("%d, %d, %s",
(int) tcp->u_arg[0],
(int) tcp->u_arg[1],
signame(tcp->u_arg[2]));
return RVAL_DECODED;
}
SYS_FUNC(sigpending)
{
if (exiting(tcp))
print_sigset_addr_len(tcp, tcp->u_arg[0], current_wordsize);
return 0;
}
SYS_FUNC(rt_sigprocmask)
{
/* Note: arg[3] is the length of the sigset. Kernel requires NSIG / 8 */
if (entering(tcp)) {
printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
tprints(", ");
print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[3]);
tprints(", ");
}
else {
print_sigset_addr_len(tcp, tcp->u_arg[2], tcp->u_arg[3]);
tprintf(", %lu", tcp->u_arg[3]);
}
return 0;
}
/* Structure describing the action to be taken when a signal arrives. */
struct new_sigaction
{
/* sa_handler may be a libc #define, need to use other name: */
#ifdef MIPS
unsigned int sa_flags;
void (*__sa_handler)(int);
#else
void (*__sa_handler)(int);
unsigned long sa_flags;
#endif /* !MIPS */
#if HAVE_SA_RESTORER
void (*sa_restorer)(void);
#endif
/* Kernel treats sa_mask as an array of longs. */
unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
};
/* Same for i386-on-x86_64 and similar cases */
struct new_sigaction32
{
uint32_t __sa_handler;
uint32_t sa_flags;
#if HAVE_SA_RESTORER
uint32_t sa_restorer;
#endif
uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
};
static void
decode_new_sigaction(struct tcb *tcp, long addr)
{
struct new_sigaction sa;
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
if (current_wordsize != sizeof(sa.sa_flags) && current_wordsize == 4) {
struct new_sigaction32 sa32;
if (umove_or_printaddr(tcp, addr, &sa32))
return;
memset(&sa, 0, sizeof(sa));
sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
sa.sa_flags = sa32.sa_flags;
#if HAVE_SA_RESTORER && defined SA_RESTORER
sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
#endif
/* Kernel treats sa_mask as an array of longs.
* For 32-bit process, "long" is uint32_t, thus, for example,
* 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
* But for (64-bit) kernel, 32th bit in sa_mask is
* 32th bit in 0th (64-bit) long!
* For little-endian, it's the same.
* For big-endian, we swap 32-bit words.
*/
sa.sa_mask[0] = LONG_LONG(sa32.sa_mask[0], sa32.sa_mask[1]);
} else
#endif
if (umove_or_printaddr(tcp, addr, &sa))
return;
/* Architectures using function pointers, like
* hppa, may need to manipulate the function pointer
* to compute the result of a comparison. However,
* the __sa_handler function pointer exists only in
* the address space of the traced process, and can't
* be manipulated by strace. In order to prevent the
* compiler from generating code to manipulate
* __sa_handler we cast the function pointers to long. */
tprints("{sa_handler=");
print_sa_handler((unsigned long) sa.__sa_handler);
tprints(", sa_mask=");
/*
* Sigset size is in tcp->u_arg[4] (SPARC)
* or in tcp->u_arg[3] (all other),
* but kernel won't handle sys_rt_sigaction
* with wrong sigset size (just returns EINVAL instead).
* We just fetch the right size, which is NSIG / 8.
*/
tprintsigmask_val("", sa.sa_mask);
tprints(", sa_flags=");
printflags(sigact_flags, sa.sa_flags, "SA_???");
#if HAVE_SA_RESTORER && defined SA_RESTORER
if (sa.sa_flags & SA_RESTORER)
tprintf(", sa_restorer=%p", sa.sa_restorer);
#endif
tprints("}");
}
SYS_FUNC(rt_sigaction)
{
if (entering(tcp)) {
printsignal(tcp->u_arg[0]);
tprints(", ");
decode_new_sigaction(tcp, tcp->u_arg[1]);
tprints(", ");
} else {
decode_new_sigaction(tcp, tcp->u_arg[2]);
#if defined(SPARC) || defined(SPARC64)
tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
#elif defined(ALPHA)
tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
#else
tprintf(", %lu", tcp->u_arg[3]);
#endif
}
return 0;
}
SYS_FUNC(rt_sigpending)
{
if (exiting(tcp)) {
/*
* One of the few syscalls where sigset size (arg[1])
* is allowed to be <= NSIG / 8, not strictly ==.
* This allows non-rt sigpending() syscall
* to reuse rt_sigpending() code in kernel.
*/
print_sigset_addr_len_limit(tcp, tcp->u_arg[0],
tcp->u_arg[1], 1);
tprintf(", %lu", tcp->u_arg[1]);
}
return 0;
}
SYS_FUNC(rt_sigsuspend)
{
/* NB: kernel requires arg[1] == NSIG / 8 */
print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
tprintf(", %lu", tcp->u_arg[1]);
return RVAL_DECODED;
}
static void
print_sigqueueinfo(struct tcb *tcp, int sig, unsigned long uinfo)
{
printsignal(sig);
tprints(", ");
printsiginfo_at(tcp, uinfo);
}
SYS_FUNC(rt_sigqueueinfo)
{
tprintf("%d, ", (int) tcp->u_arg[0]);
print_sigqueueinfo(tcp, tcp->u_arg[1], tcp->u_arg[2]);
return RVAL_DECODED;
}
SYS_FUNC(rt_tgsigqueueinfo)
{
tprintf("%d, %d, ", (int) tcp->u_arg[0], (int) tcp->u_arg[1]);
print_sigqueueinfo(tcp, tcp->u_arg[2], tcp->u_arg[3]);
return RVAL_DECODED;
}
SYS_FUNC(rt_sigtimedwait)
{
/* NB: kernel requires arg[3] == NSIG / 8 */
if (entering(tcp)) {
print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[3]);
tprints(", ");
if (!(tcp->u_arg[1] && verbose(tcp))) {
/*
* This is the only "return" parameter,
* if we are not going to fetch it on exit,
* decode all parameters on entry.
*/
printaddr(tcp->u_arg[1]);
tprints(", ");
print_timespec(tcp, tcp->u_arg[2]);
tprintf(", %lu", tcp->u_arg[3]);
} else {
char *sts = xstrdup(sprint_timespec(tcp, tcp->u_arg[2]));
set_tcb_priv_data(tcp, sts, free);
}
} else {
if (tcp->u_arg[1] && verbose(tcp)) {
printsiginfo_at(tcp, tcp->u_arg[1]);
tprints(", ");
tprints(get_tcb_priv_data(tcp));
tprintf(", %lu", tcp->u_arg[3]);
}
if (!syserror(tcp) && tcp->u_rval) {
tcp->auxstr = signame(tcp->u_rval);
return RVAL_STR;
}
}
return 0;
};
SYS_FUNC(restart_syscall)
{
tprintf("<... resuming interrupted %s ...>",
tcp->s_prev_ent ? tcp->s_prev_ent->sys_name : "system call");
return RVAL_DECODED;
}
|