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>
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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.
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.
40 # ifndef PTRACE_PEEKUSR
41 # define PTRACE_PEEKUSR PTRACE_PEEKUSER
43 # ifndef PTRACE_POKEUSR
44 # define PTRACE_POKEUSR PTRACE_POKEUSER
46 #elif defined(HAVE_LINUX_PTRACE_H)
47 # undef PTRACE_SYSCALL
48 # ifdef HAVE_STRUCT_IA64_FPREG
49 # define ia64_fpreg XXX_ia64_fpreg
51 # ifdef HAVE_STRUCT_PT_ALL_USER_REGS
52 # define pt_all_user_regs XXX_pt_all_user_regs
54 # include <linux/ptrace.h>
56 # undef pt_all_user_regs
60 # include <asm/ptrace_offsets.h>
64 # undef PTRACE_GETREGS
65 # define PTRACE_GETREGS PTRACE_GETREGS64
66 # undef PTRACE_SETREGS
67 # define PTRACE_SETREGS PTRACE_SETREGS64
70 #if defined(SPARC) || defined(SPARC64) || defined(MIPS)
72 struct pt_regs si_regs;
75 #elif defined HAVE_ASM_SIGCONTEXT_H
76 # if !defined(IA64) && !defined(X86_64) && !defined(X32)
77 # include <asm/sigcontext.h>
79 #else /* !HAVE_ASM_SIGCONTEXT_H */
80 # if defined I386 && !defined HAVE_STRUCT_SIGCONTEXT_STRUCT
81 struct sigcontext_struct {
82 unsigned short gs, __gsh;
83 unsigned short fs, __fsh;
84 unsigned short es, __esh;
85 unsigned short ds, __dsh;
97 unsigned short cs, __csh;
99 unsigned long esp_at_signal;
100 unsigned short ss, __ssh;
102 unsigned long oldmask;
106 # if defined M68K && !defined HAVE_STRUCT_SIGCONTEXT
109 unsigned long sc_mask;
110 unsigned long sc_usp;
115 unsigned short sc_sr;
117 unsigned short sc_formatvec;
121 #endif /* !HAVE_ASM_SIGCONTEXT_H */
124 # warning: NSIG is not defined, using 32
128 /* Ugh. Is this really correct? ARM has no RT signals?! */
133 #ifdef HAVE_SIGACTION
135 #if defined I386 || defined X86_64 || defined X32
136 /* The libc headers do not define this constant since it should only be
137 used by the implementation. So we define it here. */
139 # define SA_RESTORER 0x04000000
143 static const struct xlat sigact_flags[] = {
145 { SA_RESTORER, "SA_RESTORER" },
148 { SA_STACK, "SA_STACK" },
151 { SA_RESTART, "SA_RESTART" },
154 { SA_INTERRUPT, "SA_INTERRUPT" },
157 { SA_NODEFER, "SA_NODEFER" },
159 #if defined SA_NOMASK && SA_NODEFER != SA_NOMASK
160 { SA_NOMASK, "SA_NOMASK" },
163 { SA_RESETHAND, "SA_RESETHAND" },
165 #if defined SA_ONESHOT && SA_ONESHOT != SA_RESETHAND
166 { SA_ONESHOT, "SA_ONESHOT" },
169 { SA_SIGINFO, "SA_SIGINFO" },
172 { SA_RESETHAND, "SA_RESETHAND" },
175 { SA_ONSTACK, "SA_ONSTACK" },
178 { SA_NODEFER, "SA_NODEFER" },
181 { SA_NOCLDSTOP, "SA_NOCLDSTOP" },
184 { SA_NOCLDWAIT, "SA_NOCLDWAIT" },
187 { _SA_BSDCALL, "_SA_BSDCALL" },
190 { SA_NOPTRACE, "SA_NOPTRACE" },
195 static const struct xlat sigprocmaskcmds[] = {
196 { SIG_BLOCK, "SIG_BLOCK" },
197 { SIG_UNBLOCK, "SIG_UNBLOCK" },
198 { SIG_SETMASK, "SIG_SETMASK" },
200 { SIG_SETMASK32,"SIG_SETMASK32" },
205 #endif /* HAVE_SIGACTION */
207 /* Anonymous realtime signals. */
208 /* Under glibc 2.1, SIGRTMIN et al are functions, but __SIGRTMIN is a
209 constant. This is what we want. Otherwise, just use SIGRTMIN. */
212 #define __SIGRTMIN SIGRTMIN
213 #define __SIGRTMAX SIGRTMAX /* likewise */
217 /* Note on the size of sigset_t:
219 * In glibc, sigset_t is an array with space for 1024 bits (!),
220 * even though all arches supported by Linux have only 64 signals
221 * except MIPS, which has 128. IOW, it is 128 bytes long.
223 * In-kernel sigset_t is sized correctly (it is either 64 or 128 bit long).
224 * However, some old syscall return only 32 lower bits (one word).
225 * Example: sys_sigpending vs sys_rt_sigpending.
227 * Be aware of this fact when you try to
228 * memcpy(&tcp->u_arg[1], &something, sizeof(sigset_t))
229 * - sizeof(sigset_t) is much bigger than you think,
230 * it may overflow tcp->u_arg[] array, and it may try to copy more data
231 * than is really available in <something>.
233 * umoven(tcp, addr, sizeof(sigset_t), &sigset)
234 * may be a bad idea: it'll try to read much more data than needed
235 * to fetch a sigset_t.
236 * Use (NSIG / 8) as a size instead.
242 static char buf[sizeof("SIGRT_%d") + sizeof(int)*3];
244 if (sig >= 0 && sig < nsignals)
245 return signalent[sig];
247 if (sig >= __SIGRTMIN && sig <= __SIGRTMAX) {
248 sprintf(buf, "SIGRT_%d", (int)(sig - __SIGRTMIN));
252 sprintf(buf, "%d", sig);
257 long_to_sigset(long l, sigset_t *s)
264 copy_sigset_len(struct tcb *tcp, long addr, sigset_t *s, int len)
266 if (len > sizeof(*s))
269 if (umoven(tcp, addr, len, (char *)s) < 0)
274 /* Original sigset is unsigned long */
275 #define copy_sigset(tcp, addr, s) copy_sigset_len(tcp, addr, s, sizeof(long))
278 sprintsigmask(const char *str, sigset_t *mask, int rt)
279 /* set might include realtime sigs */
281 /* Was [8 * sizeof(sigset_t) * 8], but
282 * glibc sigset_t is huge (1024 bits = 128 *bytes*),
283 * and we were ending up with 8k (!) buffer here.
285 * No Unix system can have sig > 255
286 * (waitpid API won't be able to indicate death from one)
287 * and sig 0 doesn't exist either.
288 * Therefore max possible no of sigs is 255: 1..255
290 static char outstr[8 * (255 * 2 / 3)];
301 maxsigs = __SIGRTMAX; /* instead */
303 s = stpcpy(outstr, str);
305 for (i = 1; i < maxsigs; i++) {
306 if (sigismember(mask, i) == 1)
310 /* 1: show mask members, 0: show those which are NOT in mask */
311 show_members = (nsigs < nsignals * 2 / 3);
316 for (i = 1; i < maxsigs; i++) {
317 if (sigismember(mask, i) == show_members) {
318 /* real-time signals on solaris don't have
324 s = stpcpy(s, signalent[i] + 3);
327 else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
328 sprintf(tsig, "RT_%u", i - __SIGRTMIN);
331 #endif /* SIGRTMIN */
333 sprintf(tsig, "%u", i);
347 printsigmask(sigset_t *mask, int rt)
349 tprints(sprintsigmask("", mask, rt));
355 tprints(signame(nr));
359 print_sigset(struct tcb *tcp, long addr, int rt)
365 else if (copy_sigset(tcp, addr, &ss) < 0)
366 tprintf("%#lx", addr);
368 printsigmask(&ss, rt);
372 #define ILL_ILLOPC 1 /* illegal opcode */
373 #define ILL_ILLOPN 2 /* illegal operand */
374 #define ILL_ILLADR 3 /* illegal addressing mode */
375 #define ILL_ILLTRP 4 /* illegal trap */
376 #define ILL_PRVOPC 5 /* privileged opcode */
377 #define ILL_PRVREG 6 /* privileged register */
378 #define ILL_COPROC 7 /* coprocessor error */
379 #define ILL_BADSTK 8 /* internal stack error */
380 #define FPE_INTDIV 1 /* integer divide by zero */
381 #define FPE_INTOVF 2 /* integer overflow */
382 #define FPE_FLTDIV 3 /* floating point divide by zero */
383 #define FPE_FLTOVF 4 /* floating point overflow */
384 #define FPE_FLTUND 5 /* floating point underflow */
385 #define FPE_FLTRES 6 /* floating point inexact result */
386 #define FPE_FLTINV 7 /* floating point invalid operation */
387 #define FPE_FLTSUB 8 /* subscript out of range */
388 #define SEGV_MAPERR 1 /* address not mapped to object */
389 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */
390 #define BUS_ADRALN 1 /* invalid address alignment */
391 #define BUS_ADRERR 2 /* non-existant physical address */
392 #define BUS_OBJERR 3 /* object specific hardware error */
393 #define TRAP_BRKPT 1 /* process breakpoint */
394 #define TRAP_TRACE 2 /* process trace trap */
395 #define CLD_EXITED 1 /* child has exited */
396 #define CLD_KILLED 2 /* child was killed */
397 #define CLD_DUMPED 3 /* child terminated abnormally */
398 #define CLD_TRAPPED 4 /* traced child has trapped */
399 #define CLD_STOPPED 5 /* child has stopped */
400 #define CLD_CONTINUED 6 /* stopped child has continued */
401 #define POLL_IN 1 /* data input available */
402 #define POLL_OUT 2 /* output buffers available */
403 #define POLL_MSG 3 /* input message available */
404 #define POLL_ERR 4 /* i/o error */
405 #define POLL_PRI 5 /* high priority input available */
406 #define POLL_HUP 6 /* device disconnected */
407 #define SI_KERNEL 0x80 /* sent by kernel */
408 #define SI_USER 0 /* sent by kill, sigsend, raise */
409 #define SI_QUEUE -1 /* sent by sigqueue */
410 #define SI_TIMER -2 /* sent by timer expiration */
411 #define SI_MESGQ -3 /* sent by real time mesq state change */
412 #define SI_ASYNCIO -4 /* sent by AIO completion */
413 #define SI_SIGIO -5 /* sent by SIGIO */
414 #define SI_TKILL -6 /* sent by tkill */
415 #define SI_ASYNCNL -60 /* sent by asynch name lookup completion */
419 # define SI_FROMUSER(sip) ((sip)->si_code <= 0)
422 #if __GLIBC_MINOR__ < 1
423 /* Type for data associated with a signal. */
430 # define __SI_MAX_SIZE 128
431 # define __SI_PAD_SIZE ((__SI_MAX_SIZE / sizeof(int)) - 3)
433 typedef struct siginfo
435 int si_signo; /* Signal number. */
436 int si_errno; /* If non-zero, an errno value associated with
437 this signal, as defined in <errno.h>. */
438 int si_code; /* Signal code. */
442 int _pad[__SI_PAD_SIZE];
447 __pid_t si_pid; /* Sending process ID. */
448 __uid_t si_uid; /* Real user ID of sending process. */
451 /* POSIX.1b timers. */
454 unsigned int _timer1;
455 unsigned int _timer2;
458 /* POSIX.1b signals. */
461 __pid_t si_pid; /* Sending process ID. */
462 __uid_t si_uid; /* Real user ID of sending process. */
463 sigval_t si_sigval; /* Signal value. */
469 __pid_t si_pid; /* Which child. */
470 int si_status; /* Exit value or signal. */
475 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS. */
478 void *si_addr; /* Faulting insn/memory ref. */
484 int si_band; /* Band event for SIGPOLL. */
490 #define si_pid _sifields._kill.si_pid
491 #define si_uid _sifields._kill.si_uid
492 #define si_status _sifields._sigchld.si_status
493 #define si_utime _sifields._sigchld.si_utime
494 #define si_stime _sifields._sigchld.si_stime
495 #define si_value _sifields._rt.si_sigval
496 #define si_int _sifields._rt.si_sigval.sival_int
497 #define si_ptr _sifields._rt.si_sigval.sival_ptr
498 #define si_addr _sifields._sigfault.si_addr
499 #define si_band _sifields._sigpoll.si_band
500 #define si_fd _sifields._sigpoll.si_fd
504 static const struct xlat siginfo_codes[] = {
506 { SI_KERNEL, "SI_KERNEL" },
509 { SI_USER, "SI_USER" },
512 { SI_QUEUE, "SI_QUEUE" },
515 { SI_TIMER, "SI_TIMER" },
518 { SI_MESGQ, "SI_MESGQ" },
521 { SI_ASYNCIO, "SI_ASYNCIO" },
524 { SI_SIGIO, "SI_SIGIO" },
527 { SI_TKILL, "SI_TKILL" },
530 { SI_ASYNCNL, "SI_ASYNCNL" },
533 { SI_NOINFO, "SI_NOINFO" },
536 { SI_LWP, "SI_LWP" },
541 static const struct xlat sigill_codes[] = {
542 { ILL_ILLOPC, "ILL_ILLOPC" },
543 { ILL_ILLOPN, "ILL_ILLOPN" },
544 { ILL_ILLADR, "ILL_ILLADR" },
545 { ILL_ILLTRP, "ILL_ILLTRP" },
546 { ILL_PRVOPC, "ILL_PRVOPC" },
547 { ILL_PRVREG, "ILL_PRVREG" },
548 { ILL_COPROC, "ILL_COPROC" },
549 { ILL_BADSTK, "ILL_BADSTK" },
553 static const struct xlat sigfpe_codes[] = {
554 { FPE_INTDIV, "FPE_INTDIV" },
555 { FPE_INTOVF, "FPE_INTOVF" },
556 { FPE_FLTDIV, "FPE_FLTDIV" },
557 { FPE_FLTOVF, "FPE_FLTOVF" },
558 { FPE_FLTUND, "FPE_FLTUND" },
559 { FPE_FLTRES, "FPE_FLTRES" },
560 { FPE_FLTINV, "FPE_FLTINV" },
561 { FPE_FLTSUB, "FPE_FLTSUB" },
565 static const struct xlat sigtrap_codes[] = {
566 { TRAP_BRKPT, "TRAP_BRKPT" },
567 { TRAP_TRACE, "TRAP_TRACE" },
571 static const struct xlat sigchld_codes[] = {
572 { CLD_EXITED, "CLD_EXITED" },
573 { CLD_KILLED, "CLD_KILLED" },
574 { CLD_DUMPED, "CLD_DUMPED" },
575 { CLD_TRAPPED, "CLD_TRAPPED" },
576 { CLD_STOPPED, "CLD_STOPPED" },
577 { CLD_CONTINUED,"CLD_CONTINUED" },
581 static const struct xlat sigpoll_codes[] = {
582 { POLL_IN, "POLL_IN" },
583 { POLL_OUT, "POLL_OUT" },
584 { POLL_MSG, "POLL_MSG" },
585 { POLL_ERR, "POLL_ERR" },
586 { POLL_PRI, "POLL_PRI" },
587 { POLL_HUP, "POLL_HUP" },
591 static const struct xlat sigprof_codes[] = {
593 { PROF_SIG, "PROF_SIG" },
599 static const struct xlat sigemt_codes[] = {
601 { EMT_TAGOVF, "EMT_TAGOVF" },
607 static const struct xlat sigsegv_codes[] = {
608 { SEGV_MAPERR, "SEGV_MAPERR" },
609 { SEGV_ACCERR, "SEGV_ACCERR" },
613 static const struct xlat sigbus_codes[] = {
614 { BUS_ADRALN, "BUS_ADRALN" },
615 { BUS_ADRERR, "BUS_ADRERR" },
616 { BUS_OBJERR, "BUS_OBJERR" },
621 printsiginfo(siginfo_t *sip, int verbose)
625 if (sip->si_signo == 0) {
629 tprints("{si_signo=");
630 printsignal(sip->si_signo);
631 code = xlookup(siginfo_codes, sip->si_code);
633 switch (sip->si_signo) {
635 code = xlookup(sigtrap_codes, sip->si_code);
638 code = xlookup(sigchld_codes, sip->si_code);
641 code = xlookup(sigpoll_codes, sip->si_code);
644 code = xlookup(sigprof_codes, sip->si_code);
647 code = xlookup(sigill_codes, sip->si_code);
651 code = xlookup(sigemt_codes, sip->si_code);
655 code = xlookup(sigfpe_codes, sip->si_code);
658 code = xlookup(sigsegv_codes, sip->si_code);
661 code = xlookup(sigbus_codes, sip->si_code);
666 tprintf(", si_code=%s", code);
668 tprintf(", si_code=%#x", sip->si_code);
670 if (sip->si_code != SI_NOINFO)
674 if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
675 tprintf(", si_errno=%d", sip->si_errno);
677 tprintf(", si_errno=%s",
678 errnoent[sip->si_errno]);
681 if (SI_FROMUSER(sip)) {
682 tprintf(", si_pid=%lu, si_uid=%lu",
683 (unsigned long) sip->si_pid,
684 (unsigned long) sip->si_uid);
685 switch (sip->si_code) {
696 tprintf(", si_value=%d", sip->si_int);
705 tprintf(", si_value={int=%u, ptr=%#lx}",
707 (unsigned long) sip->si_ptr);
712 #endif /* SI_FROMUSER */
714 switch (sip->si_signo) {
716 tprintf(", si_pid=%ld, si_status=",
718 if (sip->si_code == CLD_EXITED)
719 tprintf("%d", sip->si_status);
721 printsignal(sip->si_status);
725 tprintf(", si_utime=%llu, si_stime=%llu",
726 (unsigned long long) sip->si_utime,
727 (unsigned long long) sip->si_stime);
729 case SIGILL: case SIGFPE:
730 case SIGSEGV: case SIGBUS:
731 tprintf(", si_addr=%#lx",
732 (unsigned long) sip->si_addr);
735 switch (sip->si_code) {
736 case POLL_IN: case POLL_OUT: case POLL_MSG:
737 tprintf(", si_band=%ld",
738 (long) sip->si_band);
743 if (sip->si_pid || sip->si_uid)
744 tprintf(", si_pid=%lu, si_uid=%lu",
745 (unsigned long) sip->si_pid,
746 (unsigned long) sip->si_uid);
752 tprintf(", si_value={int=%u, ptr=%#lx}",
754 (unsigned long) sip->si_ptr);
764 sys_sigsetmask(struct tcb *tcp)
768 long_to_sigset(tcp->u_arg[0], &sigm);
769 printsigmask(&sigm, 0);
771 else if (!syserror(tcp)) {
773 long_to_sigset(tcp->u_rval, &sigm);
774 tcp->auxstr = sprintsigmask("old mask ", &sigm, 0);
776 return RVAL_HEX | RVAL_STR;
781 #ifdef HAVE_SIGACTION
783 struct old_sigaction {
784 __sighandler_t __sa_handler;
785 unsigned long sa_mask;
786 unsigned long sa_flags;
787 void (*sa_restorer)(void);
789 #define SA_HANDLER __sa_handler
792 #define SA_HANDLER sa_handler
796 sys_sigaction(struct tcb *tcp)
800 struct old_sigaction sa;
803 printsignal(tcp->u_arg[0]);
805 addr = tcp->u_arg[1];
807 addr = tcp->u_arg[2];
810 else if (!verbose(tcp))
811 tprintf("%#lx", addr);
812 else if (umove(tcp, addr, &sa) < 0)
815 /* Architectures using function pointers, like
816 * hppa, may need to manipulate the function pointer
817 * to compute the result of a comparison. However,
818 * the SA_HANDLER function pointer exists only in
819 * the address space of the traced process, and can't
820 * be manipulated by strace. In order to prevent the
821 * compiler from generating code to manipulate
822 * SA_HANDLER we cast the function pointers to long. */
823 if ((long)sa.SA_HANDLER == (long)SIG_ERR)
824 tprints("{SIG_ERR, ");
825 else if ((long)sa.SA_HANDLER == (long)SIG_DFL)
826 tprints("{SIG_DFL, ");
827 else if ((long)sa.SA_HANDLER == (long)SIG_IGN)
828 tprints("{SIG_IGN, ");
830 tprintf("{%#lx, ", (long) sa.SA_HANDLER);
831 long_to_sigset(sa.sa_mask, &sigset);
832 printsigmask(&sigset, 0);
834 printflags(sigact_flags, sa.sa_flags, "SA_???");
836 if (sa.sa_flags & SA_RESTORER)
837 tprintf(", %p", sa.sa_restorer);
844 tprintf(", %#lx", (unsigned long) sa.sa_restorer);
849 sys_signal(struct tcb *tcp)
852 printsignal(tcp->u_arg[0]);
854 switch (tcp->u_arg[1]) {
865 tprintf("%#lx", tcp->u_arg[1]);
869 else if (!syserror(tcp)) {
870 switch (tcp->u_rval) {
872 tcp->auxstr = "SIG_ERR"; break;
874 tcp->auxstr = "SIG_DFL"; break;
876 tcp->auxstr = "SIG_IGN"; break;
880 return RVAL_HEX | RVAL_STR;
885 #endif /* HAVE_SIGACTION */
888 sys_sigreturn(struct tcb *tcp)
893 struct sigcontext_struct sc;
895 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (void *)®s) == -1)
897 if (umove(tcp, regs.ARM_sp, &sc) < 0)
899 long_to_sigset(sc.oldmask, &sigm);
900 tprints(sprintsigmask(") (mask ", &sigm, 0));
903 #elif defined(S390) || defined(S390X)
906 struct sigcontext_struct sc;
907 if (upeek(tcp, PT_GPR15, &usp) < 0)
909 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
911 tprints(sprintsigmask(") (mask ", (sigset_t *)&sc.oldmask[0], 0));
916 struct sigcontext_struct sc;
917 /* Note: on i386, sc is followed on stack by struct fpstate
918 * and after it an additional u32 extramask[1] which holds
919 * upper half of the mask. We can fetch it there
920 * if/when we'd want to display the full mask...
923 if (umove(tcp, i386_regs.esp, &sc) < 0)
925 long_to_sigset(sc.oldmask, &sigm);
926 tprints(sprintsigmask(") (mask ", &sigm, 0));
931 struct sigcontext sc;
934 /* offset of sigcontext in the kernel's sigframe structure: */
935 # define SIGFRAME_SC_OFFSET 0x90
936 if (upeek(tcp, PT_R12, &sp) < 0)
938 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
941 memcpy(&sigm, &sc.sc_mask, NSIG / 8);
942 tprints(sprintsigmask(") (mask ", &sigm, 0));
945 #elif defined(POWERPC)
948 struct sigcontext_struct sc;
950 if (upeek(tcp, sizeof(unsigned long) * PT_R1, &esp) < 0)
952 /* Skip dummy stack frame. */
954 if (current_personality == 0)
961 if (umove(tcp, esp, &sc) < 0)
963 long_to_sigset(sc.oldmask, &sigm);
964 tprints(sprintsigmask(") (mask ", &sigm, 0));
970 struct sigcontext sc;
972 if (upeek(tcp, 4*PT_USP, &usp) < 0)
974 if (umove(tcp, usp, &sc) < 0)
976 long_to_sigset(sc.sc_mask, &sigm);
977 tprints(sprintsigmask(") (mask ", &sigm, 0));
983 struct sigcontext_struct sc;
985 if (upeek(tcp, REG_FP, &fp) < 0)
987 if (umove(tcp, fp, &sc) < 0)
989 long_to_sigset(sc.sc_mask, &sigm);
990 tprints(sprintsigmask(") (mask ", &sigm, 0));
993 #elif defined(SPARC) || defined(SPARC64)
999 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1000 perror("sigreturn: PTRACE_GETREGS");
1003 i1 = regs.u_regs[U_REG_O1];
1004 if (umove(tcp, i1, &si) < 0) {
1005 perror("sigreturn: umove");
1008 long_to_sigset(si.si_mask, &sigm);
1009 tprints(sprintsigmask(") (mask ", &sigm, 0));
1012 #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
1013 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
1015 if (entering(tcp)) {
1019 if (upeek(tcp, REG_SP, &sp) < 0)
1021 /* There are six words followed by a 128-byte siginfo. */
1022 sp = sp + 6 * 4 + 128;
1023 if (umove(tcp, sp, &uc) < 0)
1025 long_to_sigset(*(long *) &uc.uc_sigmask, &sigm);
1026 tprints(sprintsigmask(") (mask ", &sigm, 0));
1030 if (entering(tcp)) {
1032 struct pt_regs regs;
1035 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1036 perror("sigreturn: PTRACE_GETREGS");
1040 if (umove(tcp, sp, &si) < 0)
1042 long_to_sigset(si.si_mask, &sigm);
1043 tprints(sprintsigmask(") (mask ", &sigm, 0));
1046 #elif defined(CRISV10) || defined(CRISV32)
1047 if (entering(tcp)) {
1048 struct sigcontext sc;
1049 long regs[PT_MAX+1];
1051 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
1052 perror("sigreturn: PTRACE_GETREGS");
1055 if (umove(tcp, regs[PT_USP], &sc) < 0)
1057 long_to_sigset(sc.oldmask, &sigm);
1058 tprints(sprintsigmask(") (mask ", &sigm, 0));
1062 if (entering(tcp)) {
1067 /* offset of ucontext in the kernel's sigframe structure */
1068 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(struct siginfo)
1069 if (upeek(tcp, PTREGS_OFFSET_SP, &sp) < 0)
1071 if (umove(tcp, sp + SIGFRAME_UC_OFFSET, &uc) < 0)
1074 memcpy(&sigm, &uc.uc_sigmask, NSIG / 8);
1075 tprints(sprintsigmask(") (mask ", &sigm, 0));
1078 #elif defined(MICROBLAZE)
1079 /* TODO: Verify that this is correct... */
1080 if (entering(tcp)) {
1081 struct sigcontext sc;
1084 /* Read r1, the stack pointer. */
1085 if (upeek(tcp, 1 * 4, &sp) < 0)
1087 if (umove(tcp, sp, &sc) < 0)
1089 long_to_sigset(sc.oldmask, &sigm);
1090 tprints(sprintsigmask(") (mask ", &sigm, 0));
1094 #warning No sys_sigreturn() for this architecture
1095 #warning (no problem, just a reminder :-)
1101 sys_siggetmask(struct tcb *tcp)
1105 long_to_sigset(tcp->u_rval, &sigm);
1106 tcp->auxstr = sprintsigmask("mask ", &sigm, 0);
1108 return RVAL_HEX | RVAL_STR;
1112 sys_sigsuspend(struct tcb *tcp)
1114 if (entering(tcp)) {
1116 long_to_sigset(tcp->u_arg[2], &sigm);
1117 printsigmask(&sigm, 0);
1122 #if !defined SS_ONSTACK
1123 #define SS_ONSTACK 1
1124 #define SS_DISABLE 2
1125 #if __GLIBC_MINOR__ == 0
1135 static const struct xlat sigaltstack_flags[] = {
1136 { SS_ONSTACK, "SS_ONSTACK" },
1137 { SS_DISABLE, "SS_DISABLE" },
1142 print_stack_t(struct tcb *tcp, unsigned long addr)
1145 if (umove(tcp, addr, &ss) < 0)
1147 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1148 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1149 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1154 sys_sigaltstack(struct tcb *tcp)
1156 if (entering(tcp)) {
1157 if (tcp->u_arg[0] == 0)
1159 else if (print_stack_t(tcp, tcp->u_arg[0]) < 0)
1164 if (tcp->u_arg[1] == 0)
1166 else if (print_stack_t(tcp, tcp->u_arg[1]) < 0)
1172 #ifdef HAVE_SIGACTION
1175 sys_sigprocmask(struct tcb *tcp)
1179 if (entering(tcp)) {
1181 * Alpha/OSF is different: it doesn't pass in two pointers,
1182 * but rather passes in the new bitmask as an argument and
1183 * then returns the old bitmask. This "works" because we
1184 * only have 64 signals to worry about. If you want more,
1185 * use of the rt_sigprocmask syscall is required.
1187 * old = osf_sigprocmask(how, new);
1189 * ret = sigprocmask(how, &new, &old, ...);
1191 memcpy(&ss, &tcp->u_arg[1], sizeof(long));
1192 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1194 printsigmask(&ss, 0);
1196 else if (!syserror(tcp)) {
1197 memcpy(&ss, &tcp->u_rval, sizeof(long));
1198 tcp->auxstr = sprintsigmask("old mask ", &ss, 0);
1199 return RVAL_HEX | RVAL_STR;
1202 if (entering(tcp)) {
1203 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1205 print_sigset(tcp, tcp->u_arg[1], 0);
1211 else if (syserror(tcp))
1212 tprintf("%#lx", tcp->u_arg[2]);
1214 print_sigset(tcp, tcp->u_arg[2], 0);
1220 #endif /* HAVE_SIGACTION */
1223 sys_kill(struct tcb *tcp)
1225 if (entering(tcp)) {
1226 long pid = tcp->u_arg[0];
1227 #if SUPPORTED_PERSONALITIES > 1
1228 /* Sign-extend a 32-bit value when that's what it is. */
1229 if (current_wordsize < sizeof pid)
1230 pid = (long) (int) pid;
1232 tprintf("%ld, %s", pid, signame(tcp->u_arg[1]));
1238 sys_tgkill(struct tcb *tcp)
1240 if (entering(tcp)) {
1241 tprintf("%ld, %ld, %s",
1242 tcp->u_arg[0], tcp->u_arg[1], signame(tcp->u_arg[2]));
1248 sys_sigpending(struct tcb *tcp)
1254 tprintf("%#lx", tcp->u_arg[0]);
1255 else if (copy_sigset(tcp, tcp->u_arg[0], &sigset) < 0)
1258 printsigmask(&sigset, 0);
1264 sys_rt_sigprocmask(struct tcb *tcp)
1268 /* Note: arg[3] is the length of the sigset. */
1269 if (entering(tcp)) {
1270 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1274 else if (copy_sigset_len(tcp, tcp->u_arg[1], &sigset, tcp->u_arg[3]) < 0)
1275 tprintf("%#lx, ", tcp->u_arg[1]);
1277 printsigmask(&sigset, 1);
1284 else if (syserror(tcp))
1285 tprintf("%#lx", tcp->u_arg[2]);
1286 else if (copy_sigset_len(tcp, tcp->u_arg[2], &sigset, tcp->u_arg[3]) < 0)
1289 printsigmask(&sigset, 1);
1290 tprintf(", %lu", tcp->u_arg[3]);
1295 /* Structure describing the action to be taken when a signal arrives. */
1296 struct new_sigaction
1298 __sighandler_t __sa_handler;
1299 unsigned long sa_flags;
1300 void (*sa_restorer) (void);
1301 /* Kernel treats sa_mask as an array of longs. */
1302 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1304 /* Same for i386-on-x86_64 and similar cases */
1305 struct new_sigaction32
1307 uint32_t __sa_handler;
1309 uint32_t sa_restorer;
1310 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1314 sys_rt_sigaction(struct tcb *tcp)
1316 struct new_sigaction sa;
1321 if (entering(tcp)) {
1322 printsignal(tcp->u_arg[0]);
1324 addr = tcp->u_arg[1];
1326 addr = tcp->u_arg[2];
1332 if (!verbose(tcp)) {
1333 tprintf("%#lx", addr);
1336 #if SUPPORTED_PERSONALITIES > 1
1338 if (current_wordsize != sizeof(sa.sa_flags) && current_wordsize == 4) {
1339 struct new_sigaction32 sa32;
1340 r = umove(tcp, addr, &sa32);
1342 memset(&sa, 0, sizeof(sa));
1343 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1344 sa.sa_flags = sa32.sa_flags;
1345 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1346 /* Kernel treats sa_mask as an array of longs.
1347 * For 32-bit process, "long" is uint32_t, thus, for example,
1348 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1349 * But for (64-bit) kernel, 32th bit in sa_mask is
1350 * 32th bit in 0th (64-bit) long!
1351 * For little-endian, it's the same.
1352 * For big-endian, we swap 32-bit words.
1354 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1360 r = umove(tcp, addr, &sa);
1366 /* Architectures using function pointers, like
1367 * hppa, may need to manipulate the function pointer
1368 * to compute the result of a comparison. However,
1369 * the SA_HANDLER function pointer exists only in
1370 * the address space of the traced process, and can't
1371 * be manipulated by strace. In order to prevent the
1372 * compiler from generating code to manipulate
1373 * SA_HANDLER we cast the function pointers to long. */
1374 if ((long)sa.__sa_handler == (long)SIG_ERR)
1375 tprints("{SIG_ERR, ");
1376 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1377 tprints("{SIG_DFL, ");
1378 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1379 tprints("{SIG_IGN, ");
1381 tprintf("{%#lx, ", (long) sa.__sa_handler);
1382 /* Questionable code below.
1383 * Kernel won't handle sys_rt_sigaction
1384 * with wrong sigset size (just returns EINVAL)
1385 * therefore tcp->u_arg[3(4)] _must_ be NSIG / 8 here,
1386 * and we always use smaller memcpy. */
1387 sigemptyset(&sigset);
1389 if (tcp->u_arg[4] <= sizeof(sigset))
1390 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[4]);
1392 if (tcp->u_arg[3] <= sizeof(sigset))
1393 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[3]);
1396 memcpy(&sigset, &sa.sa_mask, sizeof(sigset));
1397 printsigmask(&sigset, 1);
1399 printflags(sigact_flags, sa.sa_flags, "SA_???");
1401 if (sa.sa_flags & SA_RESTORER)
1402 tprintf(", %p", sa.sa_restorer);
1411 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1412 #elif defined(ALPHA)
1413 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1415 tprintf(", %lu", tcp->u_arg[3]);
1421 sys_rt_sigpending(struct tcb *tcp)
1427 tprintf("%#lx", tcp->u_arg[0]);
1428 else if (copy_sigset_len(tcp, tcp->u_arg[0],
1429 &sigset, tcp->u_arg[1]) < 0)
1432 printsigmask(&sigset, 1);
1438 sys_rt_sigsuspend(struct tcb *tcp)
1440 if (entering(tcp)) {
1442 if (copy_sigset_len(tcp, tcp->u_arg[0], &sigm, tcp->u_arg[1]) < 0)
1445 printsigmask(&sigm, 1);
1451 print_sigqueueinfo(struct tcb *tcp, int sig, unsigned long uinfo)
1457 if (umove(tcp, uinfo, &si) < 0)
1458 tprintf("%#lx", uinfo);
1460 printsiginfo(&si, verbose(tcp));
1464 sys_rt_sigqueueinfo(struct tcb *tcp)
1466 if (entering(tcp)) {
1467 tprintf("%lu, ", tcp->u_arg[0]);
1468 print_sigqueueinfo(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1474 sys_rt_tgsigqueueinfo(struct tcb *tcp)
1476 if (entering(tcp)) {
1477 tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
1478 print_sigqueueinfo(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1483 int sys_rt_sigtimedwait(struct tcb *tcp)
1485 if (entering(tcp)) {
1488 if (copy_sigset_len(tcp, tcp->u_arg[0],
1489 &sigset, tcp->u_arg[3]) < 0)
1492 printsigmask(&sigset, 1);
1494 /* This is the only "return" parameter, */
1495 if (tcp->u_arg[1] != 0)
1497 /* ... if it's NULL, can decode all on entry */
1500 else if (tcp->u_arg[1] != 0) {
1501 /* syscall exit, and u_arg[1] wasn't NULL */
1503 tprintf("%#lx, ", tcp->u_arg[1]);
1506 if (umove(tcp, tcp->u_arg[1], &si) < 0)
1507 tprintf("%#lx, ", tcp->u_arg[1]);
1509 printsiginfo(&si, verbose(tcp));
1515 /* syscall exit, and u_arg[1] was NULL */
1518 print_timespec(tcp, tcp->u_arg[2]);
1519 tprintf(", %d", (int) tcp->u_arg[3]);
1524 sys_restart_syscall(struct tcb *tcp)
1527 tprints("<... resuming interrupted call ...>");
1532 do_signalfd(struct tcb *tcp, int flags_arg)
1534 if (entering(tcp)) {
1535 printfd(tcp, tcp->u_arg[0]);
1537 print_sigset(tcp, tcp->u_arg[1], 1);
1538 tprintf(", %lu", tcp->u_arg[2]);
1539 if (flags_arg >= 0) {
1541 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1548 sys_signalfd(struct tcb *tcp)
1550 return do_signalfd(tcp, -1);
1554 sys_signalfd4(struct tcb *tcp)
1556 return do_signalfd(tcp, 3);