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 * $Id$
34 */
35
36 #include "defs.h"
37
38 #include <stdint.h>
39 #include <signal.h>
40 #ifndef HAVE_ANDROID_OS
41 #include <sys/user.h>
42 #endif
43 #include <fcntl.h>
44
45 #ifdef HAVE_ANDROID_OS
46 //FIXME use "sigprocmask" or something
47 #define sigmask(sig) (1UL << ((sig) - 1))
48 #define sigcontext_struct sigcontext
49 #endif
50
51 #ifdef SVR4
52 #include <sys/ucontext.h>
53 #endif /* SVR4 */
54
55 #ifdef HAVE_SYS_REG_H
56 # include <sys/reg.h>
57 #ifndef PTRACE_PEEKUSR
58 # define PTRACE_PEEKUSR PTRACE_PEEKUSER
59 #endif
60 #ifndef PTRACE_POKEUSR
61 # define PTRACE_POKEUSR PTRACE_POKEUSER
62 #endif
63 #elif defined(HAVE_LINUX_PTRACE_H)
64 #undef PTRACE_SYSCALL
65 # ifdef HAVE_STRUCT_IA64_FPREG
66 # define ia64_fpreg XXX_ia64_fpreg
67 # endif
68 # ifdef HAVE_STRUCT_PT_ALL_USER_REGS
69 # define pt_all_user_regs XXX_pt_all_user_regs
70 # endif
71 #include <linux/ptrace.h>
72 # undef ia64_fpreg
73 # undef pt_all_user_regs
74 #endif
75
76
77 #ifdef LINUX
78
79 #ifdef IA64
80 # include <asm/ptrace_offsets.h>
81 #endif /* !IA64 */
82
83 #if defined (LINUX) && defined (SPARC64)
84 # undef PTRACE_GETREGS
85 # define PTRACE_GETREGS PTRACE_GETREGS64
86 # undef PTRACE_SETREGS
87 # define PTRACE_SETREGS PTRACE_SETREGS64
88 #endif /* LINUX && SPARC64 */
89
90 #if defined (SPARC) || defined (SPARC64) || defined (MIPS)
91 typedef struct {
92 struct pt_regs si_regs;
93 int si_mask;
94 } m_siginfo_t;
95 #elif defined HAVE_ASM_SIGCONTEXT_H
96 #if !defined(IA64) && !defined(X86_64)
97 #include <asm/sigcontext.h>
98 #endif /* !IA64 && !X86_64 */
99 #else /* !HAVE_ASM_SIGCONTEXT_H */
100 #if defined I386 && !defined HAVE_STRUCT_SIGCONTEXT_STRUCT
101 struct sigcontext_struct {
102 unsigned short gs, __gsh;
103 unsigned short fs, __fsh;
104 unsigned short es, __esh;
105 unsigned short ds, __dsh;
106 unsigned long edi;
107 unsigned long esi;
108 unsigned long ebp;
109 unsigned long esp;
110 unsigned long ebx;
111 unsigned long edx;
112 unsigned long ecx;
113 unsigned long eax;
114 unsigned long trapno;
115 unsigned long err;
116 unsigned long eip;
117 unsigned short cs, __csh;
118 unsigned long eflags;
119 unsigned long esp_at_signal;
120 unsigned short ss, __ssh;
121 unsigned long i387;
122 unsigned long oldmask;
123 unsigned long cr2;
124 };
125 #else /* !I386 */
126 #if defined M68K && !defined HAVE_STRUCT_SIGCONTEXT
127 struct sigcontext
128 {
129 unsigned long sc_mask;
130 unsigned long sc_usp;
131 unsigned long sc_d0;
132 unsigned long sc_d1;
133 unsigned long sc_a0;
134 unsigned long sc_a1;
135 unsigned short sc_sr;
136 unsigned long sc_pc;
137 unsigned short sc_formatvec;
138 };
139 #endif /* M68K */
140 #endif /* !I386 */
141 #endif /* !HAVE_ASM_SIGCONTEXT_H */
142 #ifndef NSIG
143 #define NSIG 32
144 #endif
145 #ifdef ARM
146 #undef NSIG
147 #define NSIG 32
148 #endif
149 #endif /* LINUX */
150
151 const char *const signalent0[] = {
152 #include "signalent.h"
153 };
154 const int nsignals0 = sizeof signalent0 / sizeof signalent0[0];
155
156 #if SUPPORTED_PERSONALITIES >= 2
157 const char *const signalent1[] = {
158 #include "signalent1.h"
159 };
160 const int nsignals1 = sizeof signalent1 / sizeof signalent1[0];
161 #endif /* SUPPORTED_PERSONALITIES >= 2 */
162
163 #if SUPPORTED_PERSONALITIES >= 3
164 const char *const signalent2[] = {
165 #include "signalent2.h"
166 };
167 const int nsignals2 = sizeof signalent2 / sizeof signalent2[0];
168 #endif /* SUPPORTED_PERSONALITIES >= 3 */
169
170 const char *const *signalent;
171 int nsignals;
172
173 #if defined(SUNOS4) || defined(FREEBSD)
174
175 static const struct xlat sigvec_flags[] = {
176 { SV_ONSTACK, "SV_ONSTACK" },
177 { SV_INTERRUPT, "SV_INTERRUPT" },
178 { SV_RESETHAND, "SV_RESETHAND" },
179 { SA_NOCLDSTOP, "SA_NOCLDSTOP" },
180 { 0, NULL },
181 };
182
183 #endif /* SUNOS4 || FREEBSD */
184
185 #ifdef HAVE_SIGACTION
186
187 #if defined LINUX && (defined I386 || defined X86_64)
188 /* The libc headers do not define this constant since it should only be
189 used by the implementation. So wwe define it here. */
190 # ifndef SA_RESTORER
191 # define SA_RESTORER 0x04000000
192 # endif
193 #endif
194
195 static const struct xlat sigact_flags[] = {
196 #ifdef SA_RESTORER
197 { SA_RESTORER, "SA_RESTORER" },
198 #endif
199 #ifdef SA_STACK
200 { SA_STACK, "SA_STACK" },
201 #endif
202 #ifdef SA_RESTART
203 { SA_RESTART, "SA_RESTART" },
204 #endif
205 #ifdef SA_INTERRUPT
206 { SA_INTERRUPT, "SA_INTERRUPT" },
207 #endif
208 #ifdef SA_NODEFER
209 { SA_NODEFER, "SA_NODEFER" },
210 #endif
211 #if defined SA_NOMASK && SA_NODEFER != SA_NOMASK
212 { SA_NOMASK, "SA_NOMASK" },
213 #endif
214 #ifdef SA_RESETHAND
215 { SA_RESETHAND, "SA_RESETHAND" },
216 #endif
217 #if defined SA_ONESHOT && SA_ONESHOT != SA_RESETHAND
218 { SA_ONESHOT, "SA_ONESHOT" },
219 #endif
220 #ifdef SA_SIGINFO
221 { SA_SIGINFO, "SA_SIGINFO" },
222 #endif
223 #ifdef SA_RESETHAND
224 { SA_RESETHAND, "SA_RESETHAND" },
225 #endif
226 #ifdef SA_ONSTACK
227 { SA_ONSTACK, "SA_ONSTACK" },
228 #endif
229 #ifdef SA_NODEFER
230 { SA_NODEFER, "SA_NODEFER" },
231 #endif
232 #ifdef SA_NOCLDSTOP
233 { SA_NOCLDSTOP, "SA_NOCLDSTOP" },
234 #endif
235 #ifdef SA_NOCLDWAIT
236 { SA_NOCLDWAIT, "SA_NOCLDWAIT" },
237 #endif
238 #ifdef _SA_BSDCALL
239 { _SA_BSDCALL, "_SA_BSDCALL" },
240 #endif
241 #ifdef SA_NOPTRACE
242 { SA_NOPTRACE, "SA_NOPTRACE" },
243 #endif
244 { 0, NULL },
245 };
246
247 static const struct xlat sigprocmaskcmds[] = {
248 { SIG_BLOCK, "SIG_BLOCK" },
249 { SIG_UNBLOCK, "SIG_UNBLOCK" },
250 { SIG_SETMASK, "SIG_SETMASK" },
251 #ifdef SIG_SETMASK32
252 { SIG_SETMASK32,"SIG_SETMASK32" },
253 #endif
254 { 0, NULL },
255 };
256
257 #endif /* HAVE_SIGACTION */
258
259 /* Anonymous realtime signals. */
260 /* Under glibc 2.1, SIGRTMIN et al are functions, but __SIGRTMIN is a
261 constant. This is what we want. Otherwise, just use SIGRTMIN. */
262 #ifdef SIGRTMIN
263 #ifndef __SIGRTMIN
264 #define __SIGRTMIN SIGRTMIN
265 #define __SIGRTMAX SIGRTMAX /* likewise */
266 #endif
267 #endif
268
269 const char *
signame(sig)270 signame(sig)
271 int sig;
272 {
273 static char buf[30];
274 if (sig >= 0 && sig < nsignals) {
275 return signalent[sig];
276 #ifdef SIGRTMIN
277 } else if (sig >= __SIGRTMIN && sig <= __SIGRTMAX) {
278 sprintf(buf, "SIGRT_%ld", (long)(sig - __SIGRTMIN));
279 return buf;
280 #endif /* SIGRTMIN */
281 } else {
282 sprintf(buf, "%d", sig);
283 return buf;
284 }
285 }
286
287 #ifndef UNIXWARE
288 static void
long_to_sigset(l,s)289 long_to_sigset(l, s)
290 long l;
291 sigset_t *s;
292 {
293 sigemptyset(s);
294 *(long *)s = l;
295 }
296 #endif
297
298 static int
copy_sigset_len(tcp,addr,s,len)299 copy_sigset_len(tcp, addr, s, len)
300 struct tcb *tcp;
301 long addr;
302 sigset_t *s;
303 int len;
304 {
305 if (len > sizeof(*s))
306 len = sizeof(*s);
307 sigemptyset(s);
308 if (umoven(tcp, addr, len, (char *)s) < 0)
309 return -1;
310 return 0;
311 }
312
313 #ifdef LINUX
314 /* Original sigset is unsigned long */
315 #define copy_sigset(tcp, addr, s) copy_sigset_len(tcp, addr, s, sizeof(long))
316 #else
317 #define copy_sigset(tcp, addr, s) copy_sigset_len(tcp, addr, s, sizeof(sigset_t))
318 #endif
319
320 static const char *
sprintsigmask(const char * str,sigset_t * mask,int rt)321 sprintsigmask(const char *str, sigset_t *mask, int rt)
322 /* set might include realtime sigs */
323 {
324 int i, nsigs;
325 int maxsigs;
326 const char *format;
327 char *s;
328 static char outstr[8 * sizeof(sigset_t) * 8];
329
330 strcpy(outstr, str);
331 s = outstr + strlen(outstr);
332 nsigs = 0;
333 maxsigs = nsignals;
334 #ifdef __SIGRTMAX
335 if (rt)
336 maxsigs = __SIGRTMAX; /* instead */
337 #endif
338 for (i = 1; i < maxsigs; i++) {
339 if (sigismember(mask, i) == 1)
340 nsigs++;
341 }
342 if (nsigs >= nsignals * 2 / 3) {
343 *s++ = '~';
344 for (i = 1; i < maxsigs; i++) {
345 switch (sigismember(mask, i)) {
346 case 1:
347 sigdelset(mask, i);
348 break;
349 case 0:
350 sigaddset(mask, i);
351 break;
352 }
353 }
354 }
355 format = "%s";
356 *s++ = '[';
357 for (i = 1; i < maxsigs; i++) {
358 if (sigismember(mask, i) == 1) {
359 /* real-time signals on solaris don't have
360 * signalent entries
361 */
362 if (i < nsignals) {
363 sprintf(s, format, signalent[i] + 3);
364 }
365 #ifdef SIGRTMIN
366 else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
367 char tsig[40];
368 sprintf(tsig, "RT_%u", i - __SIGRTMIN);
369 sprintf(s, format, tsig);
370 }
371 #endif /* SIGRTMIN */
372 else {
373 char tsig[32];
374 sprintf(tsig, "%u", i);
375 sprintf(s, format, tsig);
376 }
377 s += strlen(s);
378 format = " %s";
379 }
380 }
381 *s++ = ']';
382 *s = '\0';
383 return outstr;
384 }
385
386 static void
printsigmask(mask,rt)387 printsigmask(mask, rt)
388 sigset_t *mask;
389 int rt;
390 {
391 tprintf("%s", sprintsigmask("", mask, rt));
392 }
393
394 void
printsignal(nr)395 printsignal(nr)
396 int nr;
397 {
398 tprintf("%s", signame(nr));
399 }
400
401 void
print_sigset(struct tcb * tcp,long addr,int rt)402 print_sigset(struct tcb *tcp, long addr, int rt)
403 {
404 sigset_t ss;
405
406 if (!addr)
407 tprintf("NULL");
408 else if (copy_sigset(tcp, addr, &ss) < 0)
409 tprintf("%#lx", addr);
410 else
411 printsigmask(&ss, rt);
412 }
413
414 #ifdef LINUX
415
416 #ifndef ILL_ILLOPC
417 #define ILL_ILLOPC 1 /* illegal opcode */
418 #define ILL_ILLOPN 2 /* illegal operand */
419 #define ILL_ILLADR 3 /* illegal addressing mode */
420 #define ILL_ILLTRP 4 /* illegal trap */
421 #define ILL_PRVOPC 5 /* privileged opcode */
422 #define ILL_PRVREG 6 /* privileged register */
423 #define ILL_COPROC 7 /* coprocessor error */
424 #define ILL_BADSTK 8 /* internal stack error */
425 #define FPE_INTDIV 1 /* integer divide by zero */
426 #define FPE_INTOVF 2 /* integer overflow */
427 #define FPE_FLTDIV 3 /* floating point divide by zero */
428 #define FPE_FLTOVF 4 /* floating point overflow */
429 #define FPE_FLTUND 5 /* floating point underflow */
430 #define FPE_FLTRES 6 /* floating point inexact result */
431 #define FPE_FLTINV 7 /* floating point invalid operation */
432 #define FPE_FLTSUB 8 /* subscript out of range */
433 #define SEGV_MAPERR 1 /* address not mapped to object */
434 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */
435 #define BUS_ADRALN 1 /* invalid address alignment */
436 #define BUS_ADRERR 2 /* non-existant physical address */
437 #define BUS_OBJERR 3 /* object specific hardware error */
438 #define TRAP_BRKPT 1 /* process breakpoint */
439 #define TRAP_TRACE 2 /* process trace trap */
440 #define CLD_EXITED 1 /* child has exited */
441 #define CLD_KILLED 2 /* child was killed */
442 #define CLD_DUMPED 3 /* child terminated abnormally */
443 #define CLD_TRAPPED 4 /* traced child has trapped */
444 #define CLD_STOPPED 5 /* child has stopped */
445 #define CLD_CONTINUED 6 /* stopped child has continued */
446 #define POLL_IN 1 /* data input available */
447 #define POLL_OUT 2 /* output buffers available */
448 #define POLL_MSG 3 /* input message available */
449 #define POLL_ERR 4 /* i/o error */
450 #define POLL_PRI 5 /* high priority input available */
451 #define POLL_HUP 6 /* device disconnected */
452 #define SI_KERNEL 0x80 /* sent by kernel */
453 #define SI_USER 0 /* sent by kill, sigsend, raise */
454 #define SI_QUEUE -1 /* sent by sigqueue */
455 #define SI_TIMER -2 /* sent by timer expiration */
456 #define SI_MESGQ -3 /* sent by real time mesq state change */
457 #define SI_ASYNCIO -4 /* sent by AIO completion */
458 #define SI_SIGIO -5 /* sent by SIGIO */
459 #define SI_TKILL -6 /* sent by tkill */
460 #define SI_ASYNCNL -60 /* sent by asynch name lookup completion */
461
462 #define SI_FROMUSER(sip) ((sip)->si_code <= 0)
463
464 #endif /* LINUX */
465
466 #if __GLIBC_MINOR__ < 1 && !defined(HAVE_ANDROID_OS)
467 /* Type for data associated with a signal. */
468 typedef union sigval
469 {
470 int sival_int;
471 void *sival_ptr;
472 } sigval_t;
473
474 # define __SI_MAX_SIZE 128
475 # define __SI_PAD_SIZE ((__SI_MAX_SIZE / sizeof (int)) - 3)
476
477 typedef struct siginfo
478 {
479 int si_signo; /* Signal number. */
480 int si_errno; /* If non-zero, an errno value associated with
481 this signal, as defined in <errno.h>. */
482 int si_code; /* Signal code. */
483
484 union
485 {
486 int _pad[__SI_PAD_SIZE];
487
488 /* kill(). */
489 struct
490 {
491 __pid_t si_pid; /* Sending process ID. */
492 __uid_t si_uid; /* Real user ID of sending process. */
493 } _kill;
494
495 /* POSIX.1b timers. */
496 struct
497 {
498 unsigned int _timer1;
499 unsigned int _timer2;
500 } _timer;
501
502 /* POSIX.1b signals. */
503 struct
504 {
505 __pid_t si_pid; /* Sending process ID. */
506 __uid_t si_uid; /* Real user ID of sending process. */
507 sigval_t si_sigval; /* Signal value. */
508 } _rt;
509
510 /* SIGCHLD. */
511 struct
512 {
513 __pid_t si_pid; /* Which child. */
514 int si_status; /* Exit value or signal. */
515 __clock_t si_utime;
516 __clock_t si_stime;
517 } _sigchld;
518
519 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS. */
520 struct
521 {
522 void *si_addr; /* Faulting insn/memory ref. */
523 } _sigfault;
524
525 /* SIGPOLL. */
526 struct
527 {
528 int si_band; /* Band event for SIGPOLL. */
529 int si_fd;
530 } _sigpoll;
531 } _sifields;
532 } siginfo_t;
533
534 #define si_pid _sifields._kill.si_pid
535 #define si_uid _sifields._kill.si_uid
536 #define si_status _sifields._sigchld.si_status
537 #define si_utime _sifields._sigchld.si_utime
538 #define si_stime _sifields._sigchld.si_stime
539 #define si_value _sifields._rt.si_sigval
540 #define si_int _sifields._rt.si_sigval.sival_int
541 #define si_ptr _sifields._rt.si_sigval.sival_ptr
542 #define si_addr _sifields._sigfault.si_addr
543 #define si_band _sifields._sigpoll.si_band
544 #define si_fd _sifields._sigpoll.si_fd
545
546 #endif
547
548 #endif
549
550 #if defined (SVR4) || defined (LINUX)
551
552 static const struct xlat siginfo_codes[] = {
553 #ifdef SI_KERNEL
554 { SI_KERNEL, "SI_KERNEL" },
555 #endif
556 #ifdef SI_USER
557 { SI_USER, "SI_USER" },
558 #endif
559 #ifdef SI_QUEUE
560 { SI_QUEUE, "SI_QUEUE" },
561 #endif
562 #ifdef SI_TIMER
563 { SI_TIMER, "SI_TIMER" },
564 #endif
565 #ifdef SI_MESGQ
566 { SI_MESGQ, "SI_MESGQ" },
567 #endif
568 #ifdef SI_ASYNCIO
569 { SI_ASYNCIO, "SI_ASYNCIO" },
570 #endif
571 #ifdef SI_SIGIO
572 { SI_SIGIO, "SI_SIGIO" },
573 #endif
574 #ifdef SI_TKILL
575 { SI_TKILL, "SI_TKILL" },
576 #endif
577 #ifdef SI_ASYNCNL
578 { SI_ASYNCNL, "SI_ASYNCNL" },
579 #endif
580 #ifdef SI_NOINFO
581 { SI_NOINFO, "SI_NOINFO" },
582 #endif
583 #ifdef SI_LWP
584 { SI_LWP, "SI_LWP" },
585 #endif
586 { 0, NULL },
587 };
588
589 static const struct xlat sigill_codes[] = {
590 { ILL_ILLOPC, "ILL_ILLOPC" },
591 { ILL_ILLOPN, "ILL_ILLOPN" },
592 { ILL_ILLADR, "ILL_ILLADR" },
593 { ILL_ILLTRP, "ILL_ILLTRP" },
594 { ILL_PRVOPC, "ILL_PRVOPC" },
595 { ILL_PRVREG, "ILL_PRVREG" },
596 { ILL_COPROC, "ILL_COPROC" },
597 { ILL_BADSTK, "ILL_BADSTK" },
598 { 0, NULL },
599 };
600
601 static const struct xlat sigfpe_codes[] = {
602 { FPE_INTDIV, "FPE_INTDIV" },
603 { FPE_INTOVF, "FPE_INTOVF" },
604 { FPE_FLTDIV, "FPE_FLTDIV" },
605 { FPE_FLTOVF, "FPE_FLTOVF" },
606 { FPE_FLTUND, "FPE_FLTUND" },
607 { FPE_FLTRES, "FPE_FLTRES" },
608 { FPE_FLTINV, "FPE_FLTINV" },
609 { FPE_FLTSUB, "FPE_FLTSUB" },
610 { 0, NULL },
611 };
612
613 static const struct xlat sigtrap_codes[] = {
614 { TRAP_BRKPT, "TRAP_BRKPT" },
615 { TRAP_TRACE, "TRAP_TRACE" },
616 { 0, NULL },
617 };
618
619 static const struct xlat sigchld_codes[] = {
620 { CLD_EXITED, "CLD_EXITED" },
621 { CLD_KILLED, "CLD_KILLED" },
622 { CLD_DUMPED, "CLD_DUMPED" },
623 { CLD_TRAPPED, "CLD_TRAPPED" },
624 { CLD_STOPPED, "CLD_STOPPED" },
625 { CLD_CONTINUED,"CLD_CONTINUED" },
626 { 0, NULL },
627 };
628
629 static const struct xlat sigpoll_codes[] = {
630 { POLL_IN, "POLL_IN" },
631 { POLL_OUT, "POLL_OUT" },
632 { POLL_MSG, "POLL_MSG" },
633 { POLL_ERR, "POLL_ERR" },
634 { POLL_PRI, "POLL_PRI" },
635 { POLL_HUP, "POLL_HUP" },
636 { 0, NULL },
637 };
638
639 static const struct xlat sigprof_codes[] = {
640 #ifdef PROF_SIG
641 { PROF_SIG, "PROF_SIG" },
642 #endif
643 { 0, NULL },
644 };
645
646 #ifdef SIGEMT
647 static const struct xlat sigemt_codes[] = {
648 #ifdef EMT_TAGOVF
649 { EMT_TAGOVF, "EMT_TAGOVF" },
650 #endif
651 { 0, NULL },
652 };
653 #endif
654
655 static const struct xlat sigsegv_codes[] = {
656 { SEGV_MAPERR, "SEGV_MAPERR" },
657 { SEGV_ACCERR, "SEGV_ACCERR" },
658 { 0, NULL },
659 };
660
661 static const struct xlat sigbus_codes[] = {
662 { BUS_ADRALN, "BUS_ADRALN" },
663 { BUS_ADRERR, "BUS_ADRERR" },
664 { BUS_OBJERR, "BUS_OBJERR" },
665 { 0, NULL },
666 };
667
668 void
printsiginfo(siginfo_t * sip,int verbose)669 printsiginfo(siginfo_t *sip, int verbose)
670 {
671 const char *code;
672
673 if (sip->si_signo == 0) {
674 tprintf ("{}");
675 return;
676 }
677 tprintf("{si_signo=");
678 printsignal(sip->si_signo);
679 code = xlookup(siginfo_codes, sip->si_code);
680 if (!code) {
681 switch (sip->si_signo) {
682 case SIGTRAP:
683 code = xlookup(sigtrap_codes, sip->si_code);
684 break;
685 case SIGCHLD:
686 code = xlookup(sigchld_codes, sip->si_code);
687 break;
688 case SIGPOLL:
689 code = xlookup(sigpoll_codes, sip->si_code);
690 break;
691 case SIGPROF:
692 code = xlookup(sigprof_codes, sip->si_code);
693 break;
694 case SIGILL:
695 code = xlookup(sigill_codes, sip->si_code);
696 break;
697 #ifdef SIGEMT
698 case SIGEMT:
699 code = xlookup(sigemt_codes, sip->si_code);
700 break;
701 #endif
702 case SIGFPE:
703 code = xlookup(sigfpe_codes, sip->si_code);
704 break;
705 case SIGSEGV:
706 code = xlookup(sigsegv_codes, sip->si_code);
707 break;
708 case SIGBUS:
709 code = xlookup(sigbus_codes, sip->si_code);
710 break;
711 }
712 }
713 if (code)
714 tprintf(", si_code=%s", code);
715 else
716 tprintf(", si_code=%#x", sip->si_code);
717 #ifdef SI_NOINFO
718 if (sip->si_code != SI_NOINFO)
719 #endif
720 {
721 if (sip->si_errno) {
722 if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
723 tprintf(", si_errno=%d", sip->si_errno);
724 else
725 tprintf(", si_errno=%s",
726 errnoent[sip->si_errno]);
727 }
728 #ifdef SI_FROMUSER
729 if (SI_FROMUSER(sip)) {
730 tprintf(", si_pid=%lu, si_uid=%lu",
731 (unsigned long) sip->si_pid,
732 (unsigned long) sip->si_uid);
733 switch (sip->si_code) {
734 #ifdef SI_USER
735 case SI_USER:
736 break;
737 #endif
738 #ifdef SI_TKILL
739 case SI_TKILL:
740 break;
741 #endif
742 #ifdef SI_TIMER
743 case SI_TIMER:
744 tprintf(", si_value=%d", sip->si_int);
745 break;
746 #endif
747 #ifdef LINUX
748 default:
749 if (!sip->si_ptr)
750 break;
751 if (!verbose)
752 tprintf(", ...");
753 else
754 tprintf(", si_value={int=%u, ptr=%#lx}",
755 sip->si_int,
756 (unsigned long) sip->si_ptr);
757 break;
758 #endif
759 }
760 }
761 else
762 #endif /* SI_FROMUSER */
763 {
764 switch (sip->si_signo) {
765 case SIGCHLD:
766 tprintf(", si_pid=%ld, si_status=",
767 (long) sip->si_pid);
768 if (sip->si_code == CLD_EXITED)
769 tprintf("%d", sip->si_status);
770 else
771 printsignal(sip->si_status);
772 #if LINUX
773 if (!verbose)
774 tprintf(", ...");
775 else
776 tprintf(", si_utime=%lu, si_stime=%lu",
777 sip->si_utime,
778 sip->si_stime);
779 #endif
780 break;
781 case SIGILL: case SIGFPE:
782 case SIGSEGV: case SIGBUS:
783 tprintf(", si_addr=%#lx",
784 (unsigned long) sip->si_addr);
785 break;
786 case SIGPOLL:
787 switch (sip->si_code) {
788 case POLL_IN: case POLL_OUT: case POLL_MSG:
789 tprintf(", si_band=%ld",
790 (long) sip->si_band);
791 break;
792 }
793 break;
794 #ifdef LINUX
795 default:
796 if (sip->si_pid || sip->si_uid)
797 tprintf(", si_pid=%lu, si_uid=%lu",
798 (unsigned long) sip->si_pid,
799 (unsigned long) sip->si_uid);
800 if (!sip->si_ptr)
801 break;
802 if (!verbose)
803 tprintf(", ...");
804 else {
805 tprintf(", si_value={int=%u, ptr=%#lx}",
806 sip->si_int,
807 (unsigned long) sip->si_ptr);
808 }
809 #endif
810
811 }
812 }
813 }
814 tprintf("}");
815 }
816
817 #endif /* SVR4 || LINUX */
818
819 #ifdef LINUX
820
821 static void
parse_sigset_t(const char * str,sigset_t * set)822 parse_sigset_t(const char *str, sigset_t *set)
823 {
824 const char *p;
825 unsigned int digit;
826 int i;
827
828 sigemptyset(set);
829
830 p = strchr(str, '\n');
831 if (p == NULL)
832 p = strchr(str, '\0');
833 for (i = 0; p-- > str; i += 4) {
834 if (*p >= '0' && *p <= '9')
835 digit = *p - '0';
836 else if (*p >= 'a' && *p <= 'f')
837 digit = *p - 'a' + 10;
838 else if (*p >= 'A' && *p <= 'F')
839 digit = *p - 'A' + 10;
840 else
841 break;
842 if (digit & 1)
843 sigaddset(set, i + 1);
844 if (digit & 2)
845 sigaddset(set, i + 2);
846 if (digit & 4)
847 sigaddset(set, i + 3);
848 if (digit & 8)
849 sigaddset(set, i + 4);
850 }
851 }
852
853 #endif
854
855 /*
856 * Check process TCP for the disposition of signal SIG.
857 * Return 1 if the process would somehow manage to survive signal SIG,
858 * else return 0. This routine will never be called with SIGKILL.
859 */
860 int
sigishandled(tcp,sig)861 sigishandled(tcp, sig)
862 struct tcb *tcp;
863 int sig;
864 {
865 #ifdef LINUX
866 int sfd;
867 char sname[32];
868 char buf[2048];
869 const char *s;
870 int i;
871 sigset_t ignored, caught;
872 #endif
873 #ifdef SVR4
874 /*
875 * Since procfs doesn't interfere with wait I think it is safe
876 * to punt on this question. If not, the information is there.
877 */
878 return 1;
879 #else /* !SVR4 */
880 switch (sig) {
881 case SIGCONT:
882 case SIGSTOP:
883 case SIGTSTP:
884 case SIGTTIN:
885 case SIGTTOU:
886 case SIGCHLD:
887 case SIGIO:
888 #if defined(SIGURG) && SIGURG != SIGIO
889 case SIGURG:
890 #endif
891 case SIGWINCH:
892 /* Gloria Gaynor says ... */
893 return 1;
894 default:
895 break;
896 }
897 #endif /* !SVR4 */
898 #ifdef LINUX
899
900 /* This is incredibly costly but it's worth it. */
901 /* NOTE: LinuxThreads internally uses SIGRTMIN, SIGRTMIN + 1 and
902 SIGRTMIN + 2, so we can't use the obsolete /proc/%d/stat which
903 doesn't handle real-time signals). */
904 sprintf(sname, "/proc/%d/status", tcp->pid);
905 if ((sfd = open(sname, O_RDONLY)) == -1) {
906 perror(sname);
907 return 1;
908 }
909 i = read(sfd, buf, sizeof(buf));
910 buf[i] = '\0';
911 close(sfd);
912 /*
913 * Skip the extraneous fields. We need to skip
914 * command name has any spaces in it. So be it.
915 */
916 s = strstr(buf, "SigIgn:\t");
917 if (!s)
918 {
919 fprintf(stderr, "/proc/pid/status format error\n");
920 return 1;
921 }
922 parse_sigset_t(s + 8, &ignored);
923
924 s = strstr(buf, "SigCgt:\t");
925 if (!s)
926 {
927 fprintf(stderr, "/proc/pid/status format error\n");
928 return 1;
929 }
930 parse_sigset_t(s + 8, &caught);
931
932 #ifdef DEBUG
933 fprintf(stderr, "sigs: %016qx %016qx (sig=%d)\n",
934 *(long long *) &ignored, *(long long *) &caught, sig);
935 #endif
936 if (sigismember(&ignored, sig) || sigismember(&caught, sig))
937 return 1;
938 #endif /* LINUX */
939
940 #ifdef SUNOS4
941 void (*u_signal)();
942
943 if (upeek(tcp, uoff(u_signal[0]) + sig*sizeof(u_signal),
944 (long *) &u_signal) < 0) {
945 return 0;
946 }
947 if (u_signal != SIG_DFL)
948 return 1;
949 #endif /* SUNOS4 */
950
951 return 0;
952 }
953
954 #if defined(SUNOS4) || defined(FREEBSD)
955
956 int
sys_sigvec(tcp)957 sys_sigvec(tcp)
958 struct tcb *tcp;
959 {
960 struct sigvec sv;
961 long addr;
962
963 if (entering(tcp)) {
964 printsignal(tcp->u_arg[0]);
965 tprintf(", ");
966 addr = tcp->u_arg[1];
967 } else {
968 addr = tcp->u_arg[2];
969 }
970 if (addr == 0)
971 tprintf("NULL");
972 else if (!verbose(tcp))
973 tprintf("%#lx", addr);
974 else if (umove(tcp, addr, &sv) < 0)
975 tprintf("{...}");
976 else {
977 switch ((int) sv.sv_handler) {
978 case (int) SIG_ERR:
979 tprintf("{SIG_ERR}");
980 break;
981 case (int) SIG_DFL:
982 tprintf("{SIG_DFL}");
983 break;
984 case (int) SIG_IGN:
985 if (tcp->u_arg[0] == SIGTRAP) {
986 tcp->flags |= TCB_SIGTRAPPED;
987 kill(tcp->pid, SIGSTOP);
988 }
989 tprintf("{SIG_IGN}");
990 break;
991 case (int) SIG_HOLD:
992 if (tcp->u_arg[0] == SIGTRAP) {
993 tcp->flags |= TCB_SIGTRAPPED;
994 kill(tcp->pid, SIGSTOP);
995 }
996 tprintf("SIG_HOLD");
997 break;
998 default:
999 if (tcp->u_arg[0] == SIGTRAP) {
1000 tcp->flags |= TCB_SIGTRAPPED;
1001 kill(tcp->pid, SIGSTOP);
1002 }
1003 tprintf("{%#lx, ", (unsigned long) sv.sv_handler);
1004 printsigmask(&sv.sv_mask, 0);
1005 tprintf(", ");
1006 printflags(sigvec_flags, sv.sv_flags, "SV_???");
1007 tprintf("}");
1008 }
1009 }
1010 if (entering(tcp))
1011 tprintf(", ");
1012 return 0;
1013 }
1014
1015 int
sys_sigpause(tcp)1016 sys_sigpause(tcp)
1017 struct tcb *tcp;
1018 {
1019 if (entering(tcp)) { /* WTA: UD had a bug here: he forgot the braces */
1020 sigset_t sigm;
1021 long_to_sigset(tcp->u_arg[0], &sigm);
1022 printsigmask(&sigm, 0);
1023 }
1024 return 0;
1025 }
1026
1027 int
sys_sigstack(tcp)1028 sys_sigstack(tcp)
1029 struct tcb *tcp;
1030 {
1031 struct sigstack ss;
1032 long addr;
1033
1034 if (entering(tcp))
1035 addr = tcp->u_arg[0];
1036 else
1037 addr = tcp->u_arg[1];
1038 if (addr == 0)
1039 tprintf("NULL");
1040 else if (umove(tcp, addr, &ss) < 0)
1041 tprintf("%#lx", addr);
1042 else {
1043 tprintf("{ss_sp %#lx ", (unsigned long) ss.ss_sp);
1044 tprintf("ss_onstack %s}", ss.ss_onstack ? "YES" : "NO");
1045 }
1046 if (entering(tcp))
1047 tprintf(", ");
1048 return 0;
1049 }
1050
1051 int
sys_sigcleanup(tcp)1052 sys_sigcleanup(tcp)
1053 struct tcb *tcp;
1054 {
1055 return 0;
1056 }
1057
1058 #endif /* SUNOS4 || FREEBSD */
1059
1060 #ifndef SVR4
1061
1062 int
sys_sigsetmask(tcp)1063 sys_sigsetmask(tcp)
1064 struct tcb *tcp;
1065 {
1066 if (entering(tcp)) {
1067 sigset_t sigm;
1068 long_to_sigset(tcp->u_arg[0], &sigm);
1069 printsigmask(&sigm, 0);
1070 #ifndef USE_PROCFS
1071 if ((tcp->u_arg[0] & sigmask(SIGTRAP))) {
1072 /* Mark attempt to block SIGTRAP */
1073 tcp->flags |= TCB_SIGTRAPPED;
1074 /* Send unblockable signal */
1075 kill(tcp->pid, SIGSTOP);
1076 }
1077 #endif /* !USE_PROCFS */
1078 }
1079 else if (!syserror(tcp)) {
1080 sigset_t sigm;
1081 long_to_sigset(tcp->u_rval, &sigm);
1082 tcp->auxstr = sprintsigmask("old mask ", &sigm, 0);
1083
1084 return RVAL_HEX | RVAL_STR;
1085 }
1086 return 0;
1087 }
1088
1089 #if defined(SUNOS4) || defined(FREEBSD)
1090 int
sys_sigblock(tcp)1091 sys_sigblock(tcp)
1092 struct tcb *tcp;
1093 {
1094 return sys_sigsetmask(tcp);
1095 }
1096 #endif /* SUNOS4 || FREEBSD */
1097
1098 #endif /* !SVR4 */
1099
1100 #ifdef HAVE_SIGACTION
1101
1102 #ifdef LINUX
1103 struct old_sigaction {
1104 __sighandler_t __sa_handler;
1105 unsigned long sa_mask;
1106 unsigned long sa_flags;
1107 void (*sa_restorer)(void);
1108 };
1109 #define SA_HANDLER __sa_handler
1110 #endif /* LINUX */
1111
1112 #ifndef SA_HANDLER
1113 #define SA_HANDLER sa_handler
1114 #endif
1115
1116 int
sys_sigaction(tcp)1117 sys_sigaction(tcp)
1118 struct tcb *tcp;
1119 {
1120 long addr;
1121 #ifdef LINUX
1122 sigset_t sigset;
1123 struct old_sigaction sa;
1124 #else
1125 struct sigaction sa;
1126 #endif
1127
1128
1129 if (entering(tcp)) {
1130 printsignal(tcp->u_arg[0]);
1131 tprintf(", ");
1132 addr = tcp->u_arg[1];
1133 } else
1134 addr = tcp->u_arg[2];
1135 if (addr == 0)
1136 tprintf("NULL");
1137 else if (!verbose(tcp))
1138 tprintf("%#lx", addr);
1139 else if (umove(tcp, addr, &sa) < 0)
1140 tprintf("{...}");
1141 else {
1142 /* Architectures using function pointers, like
1143 * hppa, may need to manipulate the function pointer
1144 * to compute the result of a comparison. However,
1145 * the SA_HANDLER function pointer exists only in
1146 * the address space of the traced process, and can't
1147 * be manipulated by strace. In order to prevent the
1148 * compiler from generating code to manipulate
1149 * SA_HANDLER we cast the function pointers to long. */
1150 if ((long)sa.SA_HANDLER == (long)SIG_ERR)
1151 tprintf("{SIG_ERR, ");
1152 else if ((long)sa.SA_HANDLER == (long)SIG_DFL)
1153 tprintf("{SIG_DFL, ");
1154 else if ((long)sa.SA_HANDLER == (long)SIG_IGN) {
1155 #ifndef USE_PROCFS
1156 if (tcp->u_arg[0] == SIGTRAP) {
1157 tcp->flags |= TCB_SIGTRAPPED;
1158 kill(tcp->pid, SIGSTOP);
1159 }
1160 #endif /* !USE_PROCFS */
1161 tprintf("{SIG_IGN, ");
1162 }
1163 else {
1164 #ifndef USE_PROCFS
1165 if (tcp->u_arg[0] == SIGTRAP) {
1166 tcp->flags |= TCB_SIGTRAPPED;
1167 kill(tcp->pid, SIGSTOP);
1168 }
1169 #endif /* !USE_PROCFS */
1170 tprintf("{%#lx, ", (long) sa.SA_HANDLER);
1171 #ifndef LINUX
1172 printsigmask (&sa.sa_mask, 0);
1173 #else
1174 long_to_sigset(sa.sa_mask, &sigset);
1175 printsigmask(&sigset, 0);
1176 #endif
1177 tprintf(", ");
1178 printflags(sigact_flags, sa.sa_flags, "SA_???");
1179 #ifdef SA_RESTORER
1180 if (sa.sa_flags & SA_RESTORER)
1181 tprintf(", %p", sa.sa_restorer);
1182 #endif
1183 tprintf("}");
1184 }
1185 }
1186 if (entering(tcp))
1187 tprintf(", ");
1188 #ifdef LINUX
1189 else
1190 tprintf(", %#lx", (unsigned long) sa.sa_restorer);
1191 #endif
1192 return 0;
1193 }
1194
1195 int
sys_signal(tcp)1196 sys_signal(tcp)
1197 struct tcb *tcp;
1198 {
1199 if (entering(tcp)) {
1200 printsignal(tcp->u_arg[0]);
1201 tprintf(", ");
1202 switch (tcp->u_arg[1]) {
1203 case (long) SIG_ERR:
1204 tprintf("SIG_ERR");
1205 break;
1206 case (long) SIG_DFL:
1207 tprintf("SIG_DFL");
1208 break;
1209 case (long) SIG_IGN:
1210 #ifndef USE_PROCFS
1211 if (tcp->u_arg[0] == SIGTRAP) {
1212 tcp->flags |= TCB_SIGTRAPPED;
1213 kill(tcp->pid, SIGSTOP);
1214 }
1215 #endif /* !USE_PROCFS */
1216 tprintf("SIG_IGN");
1217 break;
1218 default:
1219 #ifndef USE_PROCFS
1220 if (tcp->u_arg[0] == SIGTRAP) {
1221 tcp->flags |= TCB_SIGTRAPPED;
1222 kill(tcp->pid, SIGSTOP);
1223 }
1224 #endif /* !USE_PROCFS */
1225 tprintf("%#lx", tcp->u_arg[1]);
1226 }
1227 return 0;
1228 }
1229 else if (!syserror(tcp)) {
1230 switch (tcp->u_rval) {
1231 case (long) SIG_ERR:
1232 tcp->auxstr = "SIG_ERR"; break;
1233 case (long) SIG_DFL:
1234 tcp->auxstr = "SIG_DFL"; break;
1235 case (long) SIG_IGN:
1236 tcp->auxstr = "SIG_IGN"; break;
1237 default:
1238 tcp->auxstr = NULL;
1239 }
1240 return RVAL_HEX | RVAL_STR;
1241 }
1242 return 0;
1243 }
1244
1245 #ifdef SVR4
1246 int
sys_sighold(tcp)1247 sys_sighold(tcp)
1248 struct tcb *tcp;
1249 {
1250 if (entering(tcp)) {
1251 printsignal(tcp->u_arg[0]);
1252 }
1253 return 0;
1254 }
1255 #endif /* SVR4 */
1256
1257 #endif /* HAVE_SIGACTION */
1258
1259 #ifdef LINUX
1260
1261 int
sys_sigreturn(struct tcb * tcp)1262 sys_sigreturn(struct tcb *tcp)
1263 {
1264 #if defined(ARM)
1265 struct pt_regs regs;
1266 struct sigcontext_struct sc;
1267
1268 if (entering(tcp)) {
1269 tcp->u_arg[0] = 0;
1270
1271 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (void *)®s) == -1)
1272 return 0;
1273
1274 if (umove(tcp, regs.ARM_sp, &sc) < 0)
1275 return 0;
1276
1277 tcp->u_arg[0] = 1;
1278 tcp->u_arg[1] = sc.oldmask;
1279 } else {
1280 sigset_t sigm;
1281 long_to_sigset(tcp->u_arg[1], &sigm);
1282 tcp->u_rval = tcp->u_error = 0;
1283 if (tcp->u_arg[0] == 0)
1284 return 0;
1285 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1286 return RVAL_NONE | RVAL_STR;
1287 }
1288 return 0;
1289 #elif defined(S390) || defined(S390X)
1290 long usp;
1291 struct sigcontext_struct sc;
1292
1293 if (entering(tcp)) {
1294 tcp->u_arg[0] = 0;
1295 if (upeek(tcp,PT_GPR15,&usp)<0)
1296 return 0;
1297 if (umove(tcp, usp+__SIGNAL_FRAMESIZE, &sc) < 0)
1298 return 0;
1299 tcp->u_arg[0] = 1;
1300 memcpy(&tcp->u_arg[1],&sc.oldmask[0],sizeof(sigset_t));
1301 } else {
1302 tcp->u_rval = tcp->u_error = 0;
1303 if (tcp->u_arg[0] == 0)
1304 return 0;
1305 tcp->auxstr = sprintsigmask("mask now ",(sigset_t *)&tcp->u_arg[1],0);
1306 return RVAL_NONE | RVAL_STR;
1307 }
1308 return 0;
1309 #elif defined(I386)
1310 long esp;
1311 struct sigcontext_struct sc;
1312
1313 if (entering(tcp)) {
1314 tcp->u_arg[0] = 0;
1315 if (upeek(tcp, 4*UESP, &esp) < 0)
1316 return 0;
1317 if (umove(tcp, esp, &sc) < 0)
1318 return 0;
1319 tcp->u_arg[0] = 1;
1320 tcp->u_arg[1] = sc.oldmask;
1321 }
1322 else {
1323 sigset_t sigm;
1324 long_to_sigset(tcp->u_arg[1], &sigm);
1325 tcp->u_rval = tcp->u_error = 0;
1326 if (tcp->u_arg[0] == 0)
1327 return 0;
1328 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1329 return RVAL_NONE | RVAL_STR;
1330 }
1331 return 0;
1332 #elif defined(IA64)
1333 struct sigcontext sc;
1334 long sp;
1335
1336 if (entering(tcp)) {
1337 /* offset of sigcontext in the kernel's sigframe structure: */
1338 # define SIGFRAME_SC_OFFSET 0x90
1339 tcp->u_arg[0] = 0;
1340 if (upeek(tcp, PT_R12, &sp) < 0)
1341 return 0;
1342 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
1343 return 0;
1344 tcp->u_arg[0] = 1;
1345 memcpy(tcp->u_arg + 1, &sc.sc_mask, sizeof(sc.sc_mask));
1346 }
1347 else {
1348 sigset_t sigm;
1349
1350 memcpy(&sigm, tcp->u_arg + 1, sizeof (sigm));
1351 tcp->u_rval = tcp->u_error = 0;
1352 if (tcp->u_arg[0] == 0)
1353 return 0;
1354 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1355 return RVAL_NONE | RVAL_STR;
1356 }
1357 return 0;
1358 #elif defined(POWERPC)
1359 long esp;
1360 struct sigcontext_struct sc;
1361
1362 if (entering(tcp)) {
1363 tcp->u_arg[0] = 0;
1364 if (upeek(tcp, sizeof(unsigned long)*PT_R1, &esp) < 0)
1365 return 0;
1366 /* Skip dummy stack frame. */
1367 #ifdef POWERPC64
1368 if (current_personality == 0)
1369 esp += 128;
1370 else
1371 esp += 64;
1372 #else
1373 esp += 64;
1374 #endif
1375 if (umove(tcp, esp, &sc) < 0)
1376 return 0;
1377 tcp->u_arg[0] = 1;
1378 tcp->u_arg[1] = sc.oldmask;
1379 }
1380 else {
1381 sigset_t sigm;
1382 long_to_sigset(tcp->u_arg[1], &sigm);
1383 tcp->u_rval = tcp->u_error = 0;
1384 if (tcp->u_arg[0] == 0)
1385 return 0;
1386 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1387 return RVAL_NONE | RVAL_STR;
1388 }
1389 return 0;
1390 #elif defined(M68K)
1391 long usp;
1392 struct sigcontext sc;
1393
1394 if (entering(tcp)) {
1395 tcp->u_arg[0] = 0;
1396 if (upeek(tcp, 4*PT_USP, &usp) < 0)
1397 return 0;
1398 if (umove(tcp, usp, &sc) < 0)
1399 return 0;
1400 tcp->u_arg[0] = 1;
1401 tcp->u_arg[1] = sc.sc_mask;
1402 }
1403 else {
1404 sigset_t sigm;
1405 long_to_sigset(tcp->u_arg[1], &sigm);
1406 tcp->u_rval = tcp->u_error = 0;
1407 if (tcp->u_arg[0] == 0)
1408 return 0;
1409 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1410 return RVAL_NONE | RVAL_STR;
1411 }
1412 return 0;
1413 #elif defined(ALPHA)
1414 long fp;
1415 struct sigcontext_struct sc;
1416
1417 if (entering(tcp)) {
1418 tcp->u_arg[0] = 0;
1419 if (upeek(tcp, REG_FP, &fp) < 0)
1420 return 0;
1421 if (umove(tcp, fp, &sc) < 0)
1422 return 0;
1423 tcp->u_arg[0] = 1;
1424 tcp->u_arg[1] = sc.sc_mask;
1425 }
1426 else {
1427 sigset_t sigm;
1428 long_to_sigset(tcp->u_arg[1], &sigm);
1429 tcp->u_rval = tcp->u_error = 0;
1430 if (tcp->u_arg[0] == 0)
1431 return 0;
1432 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1433 return RVAL_NONE | RVAL_STR;
1434 }
1435 return 0;
1436 #elif defined (SPARC) || defined (SPARC64)
1437 long i1;
1438 struct pt_regs regs;
1439 m_siginfo_t si;
1440
1441 if(ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1442 perror("sigreturn: PTRACE_GETREGS ");
1443 return 0;
1444 }
1445 if(entering(tcp)) {
1446 tcp->u_arg[0] = 0;
1447 i1 = regs.u_regs[U_REG_O1];
1448 if(umove(tcp, i1, &si) < 0) {
1449 perror("sigreturn: umove ");
1450 return 0;
1451 }
1452 tcp->u_arg[0] = 1;
1453 tcp->u_arg[1] = si.si_mask;
1454 } else {
1455 sigset_t sigm;
1456 long_to_sigset(tcp->u_arg[1], &sigm);
1457 tcp->u_rval = tcp->u_error = 0;
1458 if(tcp->u_arg[0] == 0)
1459 return 0;
1460 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1461 return RVAL_NONE | RVAL_STR;
1462 }
1463 return 0;
1464 #elif defined (LINUX_MIPSN32) || defined (LINUX_MIPSN64)
1465 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
1466 sigreturn. */
1467 long sp;
1468 struct ucontext uc;
1469
1470 if(entering(tcp)) {
1471 tcp->u_arg[0] = 0;
1472 if (upeek(tcp, REG_SP, &sp) < 0)
1473 return 0;
1474 /* There are six words followed by a 128-byte siginfo. */
1475 sp = sp + 6 * 4 + 128;
1476 if (umove(tcp, sp, &uc) < 0)
1477 return 0;
1478 tcp->u_arg[0] = 1;
1479 tcp->u_arg[1] = *(long *) &uc.uc_sigmask;
1480 } else {
1481 sigset_t sigm;
1482 long_to_sigset(tcp->u_arg[1], &sigm);
1483 tcp->u_rval = tcp->u_error = 0;
1484 if(tcp->u_arg[0] == 0)
1485 return 0;
1486 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1487 return RVAL_NONE | RVAL_STR;
1488 }
1489 return 0;
1490 #elif defined(MIPS)
1491 long sp;
1492 struct pt_regs regs;
1493 m_siginfo_t si;
1494
1495 if(ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1496 perror("sigreturn: PTRACE_GETREGS ");
1497 return 0;
1498 }
1499 if(entering(tcp)) {
1500 tcp->u_arg[0] = 0;
1501 sp = regs.regs[29];
1502 if (umove(tcp, sp, &si) < 0)
1503 tcp->u_arg[0] = 1;
1504 tcp->u_arg[1] = si.si_mask;
1505 } else {
1506 sigset_t sigm;
1507 long_to_sigset(tcp->u_arg[1], &sigm);
1508 tcp->u_rval = tcp->u_error = 0;
1509 if(tcp->u_arg[0] == 0)
1510 return 0;
1511 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1512 return RVAL_NONE | RVAL_STR;
1513 }
1514 return 0;
1515 #elif defined(CRISV10) || defined(CRISV32)
1516 struct sigcontext sc;
1517
1518 if (entering(tcp)) {
1519 long regs[PT_MAX+1];
1520
1521 tcp->u_arg[0] = 0;
1522
1523 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
1524 perror("sigreturn: PTRACE_GETREGS");
1525 return 0;
1526 }
1527 if (umove(tcp, regs[PT_USP], &sc) < 0)
1528 return 0;
1529 tcp->u_arg[0] = 1;
1530 tcp->u_arg[1] = sc.oldmask;
1531 } else {
1532 sigset_t sigm;
1533 long_to_sigset(tcp->u_arg[1], &sigm);
1534 tcp->u_rval = tcp->u_error = 0;
1535
1536 if (tcp->u_arg[0] == 0)
1537 return 0;
1538 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1539 return RVAL_NONE | RVAL_STR;
1540 }
1541 return 0;
1542 #elif defined(TILE)
1543 struct ucontext uc;
1544 long sp;
1545
1546 /* offset of ucontext in the kernel's sigframe structure */
1547 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(struct siginfo)
1548
1549 if (entering(tcp)) {
1550 tcp->u_arg[0] = 0;
1551 if (upeek(tcp, PTREGS_OFFSET_SP, &sp) < 0)
1552 return 0;
1553 if (umove(tcp, sp + SIGFRAME_UC_OFFSET, &uc) < 0)
1554 return 0;
1555 tcp->u_arg[0] = 1;
1556 memcpy(tcp->u_arg + 1, &uc.uc_sigmask, sizeof(uc.uc_sigmask));
1557 }
1558 else {
1559 sigset_t sigm;
1560
1561 memcpy(&sigm, tcp->u_arg + 1, sizeof (sigm));
1562 tcp->u_rval = tcp->u_error = 0;
1563 if (tcp->u_arg[0] == 0)
1564 return 0;
1565 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1566 return RVAL_NONE | RVAL_STR;
1567 }
1568 return 0;
1569 #elif defined(MICROBLAZE)
1570 struct sigcontext sc;
1571
1572 /* TODO: Verify that this is correct... */
1573 if (entering(tcp)) {
1574 long sp;
1575
1576 tcp->u_arg[0] = 0;
1577
1578 /* Read r1, the stack pointer. */
1579 if (upeek(tcp, 1 * 4, &sp) < 0)
1580 return 0;
1581 if (umove(tcp, sp, &sc) < 0)
1582 return 0;
1583 tcp->u_arg[0] = 1;
1584 tcp->u_arg[1] = sc.oldmask;
1585 } else {
1586 sigset_t sigm;
1587 long_to_sigset(tcp->u_arg[1], &sigm);
1588 tcp->u_rval = tcp->u_error = 0;
1589 if (tcp->u_arg[0] == 0)
1590 return 0;
1591 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1592 return RVAL_NONE | RVAL_STR;
1593 }
1594 return 0;
1595 #else
1596 #warning No sys_sigreturn() for this architecture
1597 #warning (no problem, just a reminder :-)
1598 return 0;
1599 #endif
1600 }
1601
1602 int
sys_siggetmask(tcp)1603 sys_siggetmask(tcp)
1604 struct tcb *tcp;
1605 {
1606 if (exiting(tcp)) {
1607 sigset_t sigm;
1608 long_to_sigset(tcp->u_rval, &sigm);
1609 tcp->auxstr = sprintsigmask("mask ", &sigm, 0);
1610 }
1611 return RVAL_HEX | RVAL_STR;
1612 }
1613
1614 int
sys_sigsuspend(struct tcb * tcp)1615 sys_sigsuspend(struct tcb *tcp)
1616 {
1617 if (entering(tcp)) {
1618 sigset_t sigm;
1619 long_to_sigset(tcp->u_arg[2], &sigm);
1620 printsigmask(&sigm, 0);
1621 }
1622 return 0;
1623 }
1624
1625 #endif /* LINUX */
1626
1627 #if defined(SVR4) || defined(FREEBSD)
1628
1629 int
sys_sigsuspend(tcp)1630 sys_sigsuspend(tcp)
1631 struct tcb *tcp;
1632 {
1633 sigset_t sigset;
1634
1635 if (entering(tcp)) {
1636 if (umove(tcp, tcp->u_arg[0], &sigset) < 0)
1637 tprintf("[?]");
1638 else
1639 printsigmask(&sigset, 0);
1640 }
1641 return 0;
1642 }
1643 #ifndef FREEBSD
1644 static const struct xlat ucontext_flags[] = {
1645 { UC_SIGMASK, "UC_SIGMASK" },
1646 { UC_STACK, "UC_STACK" },
1647 { UC_CPU, "UC_CPU" },
1648 #ifdef UC_FPU
1649 { UC_FPU, "UC_FPU" },
1650 #endif
1651 #ifdef UC_INTR
1652 { UC_INTR, "UC_INTR" },
1653 #endif
1654 { 0, NULL },
1655 };
1656 #endif /* !FREEBSD */
1657 #endif /* SVR4 || FREEBSD */
1658
1659 #if defined SVR4 || defined LINUX || defined FREEBSD
1660 #if defined LINUX && !defined SS_ONSTACK
1661 #define SS_ONSTACK 1
1662 #define SS_DISABLE 2
1663 #if __GLIBC_MINOR__ == 0
1664 typedef struct
1665 {
1666 __ptr_t ss_sp;
1667 int ss_flags;
1668 size_t ss_size;
1669 } stack_t;
1670 #endif
1671 #endif
1672 #ifdef FREEBSD
1673 #define stack_t struct sigaltstack
1674 #endif
1675
1676 static const struct xlat sigaltstack_flags[] = {
1677 { SS_ONSTACK, "SS_ONSTACK" },
1678 { SS_DISABLE, "SS_DISABLE" },
1679 { 0, NULL },
1680 };
1681 #endif
1682
1683 #ifdef SVR4
1684 static void
printcontext(tcp,ucp)1685 printcontext(tcp, ucp)
1686 struct tcb *tcp;
1687 ucontext_t *ucp;
1688 {
1689 tprintf("{");
1690 if (!abbrev(tcp)) {
1691 tprintf("uc_flags=");
1692 printflags(ucontext_flags, ucp->uc_flags, "UC_???");
1693 tprintf(", uc_link=%#lx, ", (unsigned long) ucp->uc_link);
1694 }
1695 tprintf("uc_sigmask=");
1696 printsigmask(&ucp->uc_sigmask, 0);
1697 if (!abbrev(tcp)) {
1698 tprintf(", uc_stack={ss_sp=%#lx, ss_size=%d, ss_flags=",
1699 (unsigned long) ucp->uc_stack.ss_sp,
1700 ucp->uc_stack.ss_size);
1701 printflags(sigaltstack_flags, ucp->uc_stack.ss_flags, "SS_???");
1702 tprintf("}");
1703 }
1704 tprintf(", ...}");
1705 }
1706
1707 int
sys_getcontext(tcp)1708 sys_getcontext(tcp)
1709 struct tcb *tcp;
1710 {
1711 ucontext_t uc;
1712
1713 if (exiting(tcp)) {
1714 if (tcp->u_error)
1715 tprintf("%#lx", tcp->u_arg[0]);
1716 else if (!tcp->u_arg[0])
1717 tprintf("NULL");
1718 else if (umove(tcp, tcp->u_arg[0], &uc) < 0)
1719 tprintf("{...}");
1720 else
1721 printcontext(tcp, &uc);
1722 }
1723 return 0;
1724 }
1725
1726 int
sys_setcontext(tcp)1727 sys_setcontext(tcp)
1728 struct tcb *tcp;
1729 {
1730 ucontext_t uc;
1731
1732 if (entering(tcp)) {
1733 if (!tcp->u_arg[0])
1734 tprintf("NULL");
1735 else if (umove(tcp, tcp->u_arg[0], &uc) < 0)
1736 tprintf("{...}");
1737 else
1738 printcontext(tcp, &uc);
1739 }
1740 else {
1741 tcp->u_rval = tcp->u_error = 0;
1742 if (tcp->u_arg[0] == 0)
1743 return 0;
1744 return RVAL_NONE;
1745 }
1746 return 0;
1747 }
1748
1749 #endif /* SVR4 */
1750
1751 #if defined(LINUX) || defined(FREEBSD)
1752
1753 static int
print_stack_t(tcp,addr)1754 print_stack_t(tcp, addr)
1755 struct tcb *tcp;
1756 unsigned long addr;
1757 {
1758 stack_t ss;
1759 if (umove(tcp, addr, &ss) < 0)
1760 return -1;
1761 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1762 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1763 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1764 return 0;
1765 }
1766
1767 int
sys_sigaltstack(tcp)1768 sys_sigaltstack(tcp)
1769 struct tcb *tcp;
1770 {
1771 if (entering(tcp)) {
1772 if (tcp->u_arg[0] == 0)
1773 tprintf("NULL");
1774 else if (print_stack_t(tcp, tcp->u_arg[0]) < 0)
1775 return -1;
1776 }
1777 else {
1778 tprintf(", ");
1779 if (tcp->u_arg[1] == 0)
1780 tprintf("NULL");
1781 else if (print_stack_t(tcp, tcp->u_arg[1]) < 0)
1782 return -1;
1783 }
1784 return 0;
1785 }
1786 #endif
1787
1788 #ifdef HAVE_SIGACTION
1789
1790 int
sys_sigprocmask(tcp)1791 sys_sigprocmask(tcp)
1792 struct tcb *tcp;
1793 {
1794 #ifdef ALPHA
1795 if (entering(tcp)) {
1796 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1797 tprintf(", ");
1798 printsigmask(tcp->u_arg[1], 0);
1799 }
1800 else if (!syserror(tcp)) {
1801 tcp->auxstr = sprintsigmask("old mask ", tcp->u_rval, 0);
1802 return RVAL_HEX | RVAL_STR;
1803 }
1804 #else /* !ALPHA */
1805 if (entering(tcp)) {
1806 #ifdef SVR4
1807 if (tcp->u_arg[0] == 0)
1808 tprintf("0");
1809 else
1810 #endif /* SVR4 */
1811 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1812 tprintf(", ");
1813 print_sigset(tcp, tcp->u_arg[1], 0);
1814 tprintf(", ");
1815 }
1816 else {
1817 if (!tcp->u_arg[2])
1818 tprintf("NULL");
1819 else if (syserror(tcp))
1820 tprintf("%#lx", tcp->u_arg[2]);
1821 else
1822 print_sigset(tcp, tcp->u_arg[2], 0);
1823 }
1824 #endif /* !ALPHA */
1825 return 0;
1826 }
1827
1828 #endif /* HAVE_SIGACTION */
1829
1830 int
sys_kill(tcp)1831 sys_kill(tcp)
1832 struct tcb *tcp;
1833 {
1834 if (entering(tcp)) {
1835 /*
1836 * Sign-extend a 32-bit value when that's what it is.
1837 */
1838 long pid = tcp->u_arg[0];
1839 if (personality_wordsize[current_personality] < sizeof pid)
1840 pid = (long) (int) pid;
1841 tprintf("%ld, %s", pid, signame(tcp->u_arg[1]));
1842 }
1843 return 0;
1844 }
1845
1846 #if defined(FREEBSD) || defined(SUNOS4)
1847 int
sys_killpg(tcp)1848 sys_killpg(tcp)
1849 struct tcb *tcp;
1850 {
1851 return sys_kill(tcp);
1852 }
1853 #endif /* FREEBSD || SUNOS4 */
1854
1855 #ifdef LINUX
1856 int
sys_tgkill(tcp)1857 sys_tgkill(tcp)
1858 struct tcb *tcp;
1859 {
1860 if (entering(tcp)) {
1861 tprintf("%ld, %ld, %s",
1862 tcp->u_arg[0], tcp->u_arg[1], signame(tcp->u_arg[2]));
1863 }
1864 return 0;
1865 }
1866 #endif
1867
1868 int
sys_sigpending(tcp)1869 sys_sigpending(tcp)
1870 struct tcb *tcp;
1871 {
1872 sigset_t sigset;
1873
1874 if (exiting(tcp)) {
1875 if (syserror(tcp))
1876 tprintf("%#lx", tcp->u_arg[0]);
1877 else if (copy_sigset(tcp, tcp->u_arg[0], &sigset) < 0)
1878 tprintf("[?]");
1879 else
1880 printsigmask(&sigset, 0);
1881 }
1882 return 0;
1883 }
1884
1885 #ifdef SVR4
sys_sigwait(tcp)1886 int sys_sigwait(tcp)
1887 struct tcb *tcp;
1888 {
1889 sigset_t sigset;
1890
1891 if (entering(tcp)) {
1892 if (copy_sigset(tcp, tcp->u_arg[0], &sigset) < 0)
1893 tprintf("[?]");
1894 else
1895 printsigmask(&sigset, 0);
1896 }
1897 else {
1898 if (!syserror(tcp)) {
1899 tcp->auxstr = signalent[tcp->u_rval];
1900 return RVAL_DECIMAL | RVAL_STR;
1901 }
1902 }
1903 return 0;
1904 }
1905 #endif /* SVR4 */
1906
1907 #ifdef LINUX
1908
1909 int
sys_rt_sigprocmask(tcp)1910 sys_rt_sigprocmask(tcp)
1911 struct tcb *tcp;
1912 {
1913 sigset_t sigset;
1914
1915 /* Note: arg[3] is the length of the sigset. */
1916 if (entering(tcp)) {
1917 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1918 tprintf(", ");
1919 if (!tcp->u_arg[1])
1920 tprintf("NULL, ");
1921 else if (copy_sigset_len(tcp, tcp->u_arg[1], &sigset, tcp->u_arg[3]) < 0)
1922 tprintf("%#lx, ", tcp->u_arg[1]);
1923 else {
1924 printsigmask(&sigset, 1);
1925 tprintf(", ");
1926 }
1927 }
1928 else {
1929 if (!tcp->u_arg[2])
1930
1931 tprintf("NULL");
1932 else if (syserror(tcp))
1933 tprintf("%#lx", tcp->u_arg[2]);
1934 else if (copy_sigset_len(tcp, tcp->u_arg[2], &sigset, tcp->u_arg[3]) < 0)
1935 tprintf("[?]");
1936 else
1937 printsigmask(&sigset, 1);
1938 tprintf(", %lu", tcp->u_arg[3]);
1939 }
1940 return 0;
1941 }
1942
1943
1944 /* Structure describing the action to be taken when a signal arrives. */
1945 struct new_sigaction
1946 {
1947 __sighandler_t __sa_handler;
1948 unsigned long sa_flags;
1949 void (*sa_restorer) (void);
1950 /* Kernel treats sa_mask as an array of longs. */
1951 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1952 };
1953 /* Same for i386-on-x86_64 and similar cases */
1954 struct new_sigaction32
1955 {
1956 uint32_t __sa_handler;
1957 uint32_t sa_flags;
1958 uint32_t sa_restorer;
1959 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1960 };
1961
1962
1963 int
sys_rt_sigaction(struct tcb * tcp)1964 sys_rt_sigaction(struct tcb *tcp)
1965 {
1966 struct new_sigaction sa;
1967 sigset_t sigset;
1968 long addr;
1969 int r;
1970
1971 if (entering(tcp)) {
1972 printsignal(tcp->u_arg[0]);
1973 tprintf(", ");
1974 addr = tcp->u_arg[1];
1975 } else
1976 addr = tcp->u_arg[2];
1977
1978 if (addr == 0) {
1979 tprintf("NULL");
1980 goto after_sa;
1981 }
1982 if (!verbose(tcp)) {
1983 tprintf("%#lx", addr);
1984 goto after_sa;
1985 }
1986 #if SUPPORTED_PERSONALITIES > 1
1987 if (personality_wordsize[current_personality] != sizeof(sa.sa_flags)
1988 && personality_wordsize[current_personality] == 4
1989 ) {
1990 struct new_sigaction32 sa32;
1991 r = umove(tcp, addr, &sa32);
1992 if (r >= 0) {
1993 memset(&sa, 0, sizeof(sa));
1994 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1995 sa.sa_flags = sa32.sa_flags;
1996 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1997 /* Kernel treats sa_mask as an array of longs.
1998 * For 32-bit process, "long" is uint32_t, thus, for example,
1999 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
2000 * But for (64-bit) kernel, 32th bit in sa_mask is
2001 * 32th bit in 0th (64-bit) long!
2002 * For little-endian, it's the same.
2003 * For big-endian, we swap 32-bit words.
2004 */
2005 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
2006 }
2007 } else
2008 #endif
2009 {
2010 r = umove(tcp, addr, &sa);
2011 }
2012 if (r < 0) {
2013 tprintf("{...}");
2014 goto after_sa;
2015 }
2016 /* Architectures using function pointers, like
2017 * hppa, may need to manipulate the function pointer
2018 * to compute the result of a comparison. However,
2019 * the SA_HANDLER function pointer exists only in
2020 * the address space of the traced process, and can't
2021 * be manipulated by strace. In order to prevent the
2022 * compiler from generating code to manipulate
2023 * SA_HANDLER we cast the function pointers to long. */
2024 if ((long)sa.__sa_handler == (long)SIG_ERR)
2025 tprintf("{SIG_ERR, ");
2026 else if ((long)sa.__sa_handler == (long)SIG_DFL)
2027 tprintf("{SIG_DFL, ");
2028 else if ((long)sa.__sa_handler == (long)SIG_IGN)
2029 tprintf("{SIG_IGN, ");
2030 else
2031 tprintf("{%#lx, ", (long) sa.__sa_handler);
2032 /* Questionable code below.
2033 * Kernel won't handle sys_rt_sigaction
2034 * with wrong sigset size (just returns EINVAL)
2035 * therefore tcp->u_arg[3(4)] _must_ be NSIG / 8 here,
2036 * and we always use smaller memcpy. */
2037 sigemptyset(&sigset);
2038 #ifdef LINUXSPARC
2039 if (tcp->u_arg[4] <= sizeof(sigset))
2040 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[4]);
2041 #else
2042 if (tcp->u_arg[3] <= sizeof(sigset))
2043 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[3]);
2044 #endif
2045 else
2046 memcpy(&sigset, &sa.sa_mask, sizeof(sigset));
2047 printsigmask(&sigset, 1);
2048 tprintf(", ");
2049 printflags(sigact_flags, sa.sa_flags, "SA_???");
2050 #ifdef SA_RESTORER
2051 if (sa.sa_flags & SA_RESTORER)
2052 tprintf(", %p", sa.sa_restorer);
2053 #endif
2054 tprintf("}");
2055
2056 after_sa:
2057 if (entering(tcp))
2058 tprintf(", ");
2059 else
2060 #ifdef LINUXSPARC
2061 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
2062 #elif defined(ALPHA)
2063 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
2064 #else
2065 tprintf(", %lu", tcp->u_arg[3]);
2066 #endif
2067 return 0;
2068 }
2069
2070 int
sys_rt_sigpending(struct tcb * tcp)2071 sys_rt_sigpending(struct tcb *tcp)
2072 {
2073 sigset_t sigset;
2074
2075 if (exiting(tcp)) {
2076 if (syserror(tcp))
2077 tprintf("%#lx", tcp->u_arg[0]);
2078 else if (copy_sigset_len(tcp, tcp->u_arg[0],
2079 &sigset, tcp->u_arg[1]) < 0)
2080 tprintf("[?]");
2081 else
2082 printsigmask(&sigset, 1);
2083 }
2084 return 0;
2085 }
2086
2087 int
sys_rt_sigsuspend(struct tcb * tcp)2088 sys_rt_sigsuspend(struct tcb *tcp)
2089 {
2090 if (entering(tcp)) {
2091 sigset_t sigm;
2092 if (copy_sigset_len(tcp, tcp->u_arg[0], &sigm, tcp->u_arg[1]) < 0)
2093 tprintf("[?]");
2094 else
2095 printsigmask(&sigm, 1);
2096 }
2097 return 0;
2098 }
2099
2100 int
sys_rt_sigqueueinfo(struct tcb * tcp)2101 sys_rt_sigqueueinfo(struct tcb *tcp)
2102 {
2103 if (entering(tcp)) {
2104 siginfo_t si;
2105 tprintf("%lu, ", tcp->u_arg[0]);
2106 printsignal(tcp->u_arg[1]);
2107 tprintf(", ");
2108 if (umove(tcp, tcp->u_arg[2], &si) < 0)
2109 tprintf("%#lx", tcp->u_arg[2]);
2110 else
2111 printsiginfo(&si, verbose(tcp));
2112 }
2113 return 0;
2114 }
2115
sys_rt_sigtimedwait(struct tcb * tcp)2116 int sys_rt_sigtimedwait(struct tcb *tcp)
2117 {
2118 if (entering(tcp)) {
2119 sigset_t sigset;
2120
2121 if (copy_sigset_len(tcp, tcp->u_arg[0],
2122 &sigset, tcp->u_arg[3]) < 0)
2123 tprintf("[?]");
2124 else
2125 printsigmask(&sigset, 1);
2126 tprintf(", ");
2127 /* This is the only "return" parameter, */
2128 if (tcp->u_arg[1] != 0)
2129 return 0;
2130 /* ... if it's NULL, can decode all on entry */
2131 tprintf("NULL, ");
2132 }
2133 else if (tcp->u_arg[1] != 0) {
2134 /* syscall exit, and u_arg[1] wasn't NULL */
2135 if (syserror(tcp))
2136 tprintf("%#lx, ", tcp->u_arg[1]);
2137 else {
2138 siginfo_t si;
2139 if (umove(tcp, tcp->u_arg[1], &si) < 0)
2140 tprintf("%#lx, ", tcp->u_arg[1]);
2141 else {
2142 printsiginfo(&si, verbose(tcp));
2143 tprintf(", ");
2144 }
2145 }
2146 }
2147 else {
2148 /* syscall exit, and u_arg[1] was NULL */
2149 return 0;
2150 }
2151 print_timespec(tcp, tcp->u_arg[2]);
2152 tprintf(", %d", (int) tcp->u_arg[3]);
2153 return 0;
2154 };
2155
2156 int
sys_restart_syscall(struct tcb * tcp)2157 sys_restart_syscall(struct tcb *tcp)
2158 {
2159 if (entering(tcp))
2160 tprintf("<... resuming interrupted call ...>");
2161 return 0;
2162 }
2163
2164 static int
do_signalfd(struct tcb * tcp,int flags_arg)2165 do_signalfd(struct tcb *tcp, int flags_arg)
2166 {
2167 if (entering(tcp)) {
2168 printfd(tcp, tcp->u_arg[0]);
2169 tprintf(", ");
2170 print_sigset(tcp, tcp->u_arg[1], 1);
2171 tprintf(", %lu", tcp->u_arg[2]);
2172 if (flags_arg >= 0) {
2173 tprintf(", ");
2174 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
2175 }
2176 }
2177 return 0;
2178 }
2179
2180 int
sys_signalfd(struct tcb * tcp)2181 sys_signalfd(struct tcb *tcp)
2182 {
2183 return do_signalfd(tcp, -1);
2184 }
2185
2186 int
sys_signalfd4(struct tcb * tcp)2187 sys_signalfd4(struct tcb *tcp)
2188 {
2189 return do_signalfd(tcp, 3);
2190 }
2191 #endif /* LINUX */
2192