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.
44 # ifndef PTRACE_PEEKUSR
45 # define PTRACE_PEEKUSR PTRACE_PEEKUSER
47 # ifndef PTRACE_POKEUSR
48 # define PTRACE_POKEUSR PTRACE_POKEUSER
50 #elif defined(HAVE_LINUX_PTRACE_H)
51 # undef PTRACE_SYSCALL
52 # ifdef HAVE_STRUCT_IA64_FPREG
53 # define ia64_fpreg XXX_ia64_fpreg
55 # ifdef HAVE_STRUCT_PT_ALL_USER_REGS
56 # define pt_all_user_regs XXX_pt_all_user_regs
58 # include <linux/ptrace.h>
60 # undef pt_all_user_regs
64 # include <asm/ptrace_offsets.h>
68 # undef PTRACE_GETREGS
69 # define PTRACE_GETREGS PTRACE_GETREGS64
70 # undef PTRACE_SETREGS
71 # define PTRACE_SETREGS PTRACE_SETREGS64
74 #if defined(SPARC) || defined(SPARC64) || defined(MIPS)
76 struct pt_regs si_regs;
79 #elif defined HAVE_ASM_SIGCONTEXT_H
80 # if !defined(IA64) && !defined(X86_64)
81 # include <asm/sigcontext.h>
82 # endif /* !IA64 && !X86_64 */
83 #else /* !HAVE_ASM_SIGCONTEXT_H */
84 # if defined I386 && !defined HAVE_STRUCT_SIGCONTEXT_STRUCT
85 struct sigcontext_struct {
86 unsigned short gs, __gsh;
87 unsigned short fs, __fsh;
88 unsigned short es, __esh;
89 unsigned short ds, __dsh;
101 unsigned short cs, __csh;
102 unsigned long eflags;
103 unsigned long esp_at_signal;
104 unsigned short ss, __ssh;
106 unsigned long oldmask;
110 # if defined M68K && !defined HAVE_STRUCT_SIGCONTEXT
113 unsigned long sc_mask;
114 unsigned long sc_usp;
119 unsigned short sc_sr;
121 unsigned short sc_formatvec;
125 #endif /* !HAVE_ASM_SIGCONTEXT_H */
128 # warning: NSIG is not defined, using 32
132 /* Ugh. Is this really correct? ARM has no RT signals?! */
137 #ifdef HAVE_SIGACTION
139 #if defined(I386) || defined(X86_64)
140 /* The libc headers do not define this constant since it should only be
141 used by the implementation. So we define it here. */
143 # define SA_RESTORER 0x04000000
147 static const struct xlat sigact_flags[] = {
149 { SA_RESTORER, "SA_RESTORER" },
152 { SA_STACK, "SA_STACK" },
155 { SA_RESTART, "SA_RESTART" },
158 { SA_INTERRUPT, "SA_INTERRUPT" },
161 { SA_NODEFER, "SA_NODEFER" },
163 #if defined SA_NOMASK && SA_NODEFER != SA_NOMASK
164 { SA_NOMASK, "SA_NOMASK" },
167 { SA_RESETHAND, "SA_RESETHAND" },
169 #if defined SA_ONESHOT && SA_ONESHOT != SA_RESETHAND
170 { SA_ONESHOT, "SA_ONESHOT" },
173 { SA_SIGINFO, "SA_SIGINFO" },
176 { SA_RESETHAND, "SA_RESETHAND" },
179 { SA_ONSTACK, "SA_ONSTACK" },
182 { SA_NODEFER, "SA_NODEFER" },
185 { SA_NOCLDSTOP, "SA_NOCLDSTOP" },
188 { SA_NOCLDWAIT, "SA_NOCLDWAIT" },
191 { _SA_BSDCALL, "_SA_BSDCALL" },
194 { SA_NOPTRACE, "SA_NOPTRACE" },
199 static const struct xlat sigprocmaskcmds[] = {
200 { SIG_BLOCK, "SIG_BLOCK" },
201 { SIG_UNBLOCK, "SIG_UNBLOCK" },
202 { SIG_SETMASK, "SIG_SETMASK" },
204 { SIG_SETMASK32,"SIG_SETMASK32" },
209 #endif /* HAVE_SIGACTION */
211 /* Anonymous realtime signals. */
212 /* Under glibc 2.1, SIGRTMIN et al are functions, but __SIGRTMIN is a
213 constant. This is what we want. Otherwise, just use SIGRTMIN. */
216 #define __SIGRTMIN SIGRTMIN
217 #define __SIGRTMAX SIGRTMAX /* likewise */
221 /* Note on the size of sigset_t:
223 * In glibc, sigset_t is an array with space for 1024 bits (!),
224 * even though all arches supported by Linux have only 64 signals
225 * except MIPS, which has 128. IOW, it is 128 bytes long.
227 * In-kernel sigset_t is sized correctly (it is either 64 or 128 bit long).
228 * However, some old syscall return only 32 lower bits (one word).
229 * Example: sys_sigpending vs sys_rt_sigpending.
231 * Be aware of this fact when you try to
232 * memcpy(&tcp->u_arg[1], &something, sizeof(sigset_t))
233 * - sizeof(sigset_t) is much bigger than you think,
234 * it may overflow tcp->u_arg[] array, and it may try to copy more data
235 * than is really available in <something>.
237 * umoven(tcp, addr, sizeof(sigset_t), &sigset)
238 * may be a bad idea: it'll try to read much more data than needed
239 * to fetch a sigset_t.
240 * Use (NSIG / 8) as a size instead.
246 static char buf[sizeof("SIGRT_%d") + sizeof(int)*3];
248 if (sig >= 0 && sig < nsignals)
249 return signalent[sig];
251 if (sig >= __SIGRTMIN && sig <= __SIGRTMAX) {
252 sprintf(buf, "SIGRT_%d", (int)(sig - __SIGRTMIN));
256 sprintf(buf, "%d", sig);
261 long_to_sigset(long l, sigset_t *s)
268 copy_sigset_len(struct tcb *tcp, long addr, sigset_t *s, int len)
270 if (len > sizeof(*s))
273 if (umoven(tcp, addr, len, (char *)s) < 0)
278 /* Original sigset is unsigned long */
279 #define copy_sigset(tcp, addr, s) copy_sigset_len(tcp, addr, s, sizeof(long))
282 sprintsigmask(const char *str, sigset_t *mask, int rt)
283 /* set might include realtime sigs */
285 /* Was [8 * sizeof(sigset_t) * 8], but
286 * glibc sigset_t is huge (1024 bits = 128 *bytes*),
287 * and we were ending up with 8k (!) buffer here.
289 * No Unix system can have sig > 255
290 * (waitpid API won't be able to indicate death from one)
291 * and sig 0 doesn't exist either.
292 * Therefore max possible no of sigs is 255: 1..255
294 static char outstr[8 * (255 * 2 / 3)];
305 maxsigs = __SIGRTMAX; /* instead */
307 s = stpcpy(outstr, str);
309 for (i = 1; i < maxsigs; i++) {
310 if (sigismember(mask, i) == 1)
314 /* 1: show mask members, 0: show those which are NOT in mask */
315 show_members = (nsigs < nsignals * 2 / 3);
320 for (i = 1; i < maxsigs; i++) {
321 if (sigismember(mask, i) == show_members) {
322 /* real-time signals on solaris don't have
328 s = stpcpy(s, signalent[i] + 3);
331 else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
332 sprintf(tsig, "RT_%u", i - __SIGRTMIN);
335 #endif /* SIGRTMIN */
337 sprintf(tsig, "%u", i);
351 printsigmask(sigset_t *mask, int rt)
353 tprints(sprintsigmask("", mask, rt));
359 tprints(signame(nr));
363 print_sigset(struct tcb *tcp, long addr, int rt)
369 else if (copy_sigset(tcp, addr, &ss) < 0)
370 tprintf("%#lx", addr);
372 printsigmask(&ss, rt);
376 #define ILL_ILLOPC 1 /* illegal opcode */
377 #define ILL_ILLOPN 2 /* illegal operand */
378 #define ILL_ILLADR 3 /* illegal addressing mode */
379 #define ILL_ILLTRP 4 /* illegal trap */
380 #define ILL_PRVOPC 5 /* privileged opcode */
381 #define ILL_PRVREG 6 /* privileged register */
382 #define ILL_COPROC 7 /* coprocessor error */
383 #define ILL_BADSTK 8 /* internal stack error */
384 #define FPE_INTDIV 1 /* integer divide by zero */
385 #define FPE_INTOVF 2 /* integer overflow */
386 #define FPE_FLTDIV 3 /* floating point divide by zero */
387 #define FPE_FLTOVF 4 /* floating point overflow */
388 #define FPE_FLTUND 5 /* floating point underflow */
389 #define FPE_FLTRES 6 /* floating point inexact result */
390 #define FPE_FLTINV 7 /* floating point invalid operation */
391 #define FPE_FLTSUB 8 /* subscript out of range */
392 #define SEGV_MAPERR 1 /* address not mapped to object */
393 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */
394 #define BUS_ADRALN 1 /* invalid address alignment */
395 #define BUS_ADRERR 2 /* non-existant physical address */
396 #define BUS_OBJERR 3 /* object specific hardware error */
397 #define TRAP_BRKPT 1 /* process breakpoint */
398 #define TRAP_TRACE 2 /* process trace trap */
399 #define CLD_EXITED 1 /* child has exited */
400 #define CLD_KILLED 2 /* child was killed */
401 #define CLD_DUMPED 3 /* child terminated abnormally */
402 #define CLD_TRAPPED 4 /* traced child has trapped */
403 #define CLD_STOPPED 5 /* child has stopped */
404 #define CLD_CONTINUED 6 /* stopped child has continued */
405 #define POLL_IN 1 /* data input available */
406 #define POLL_OUT 2 /* output buffers available */
407 #define POLL_MSG 3 /* input message available */
408 #define POLL_ERR 4 /* i/o error */
409 #define POLL_PRI 5 /* high priority input available */
410 #define POLL_HUP 6 /* device disconnected */
411 #define SI_KERNEL 0x80 /* sent by kernel */
412 #define SI_USER 0 /* sent by kill, sigsend, raise */
413 #define SI_QUEUE -1 /* sent by sigqueue */
414 #define SI_TIMER -2 /* sent by timer expiration */
415 #define SI_MESGQ -3 /* sent by real time mesq state change */
416 #define SI_ASYNCIO -4 /* sent by AIO completion */
417 #define SI_SIGIO -5 /* sent by SIGIO */
418 #define SI_TKILL -6 /* sent by tkill */
419 #define SI_ASYNCNL -60 /* sent by asynch name lookup completion */
424 # define SI_FROMUSER(sip) ((sip)->si_code <= 0)
427 #if __GLIBC_MINOR__ < 1
428 /* Type for data associated with a signal. */
435 # define __SI_MAX_SIZE 128
436 # define __SI_PAD_SIZE ((__SI_MAX_SIZE / sizeof(int)) - 3)
438 typedef struct siginfo
440 int si_signo; /* Signal number. */
441 int si_errno; /* If non-zero, an errno value associated with
442 this signal, as defined in <errno.h>. */
443 int si_code; /* Signal code. */
447 int _pad[__SI_PAD_SIZE];
452 __pid_t si_pid; /* Sending process ID. */
453 __uid_t si_uid; /* Real user ID of sending process. */
456 /* POSIX.1b timers. */
459 unsigned int _timer1;
460 unsigned int _timer2;
463 /* POSIX.1b signals. */
466 __pid_t si_pid; /* Sending process ID. */
467 __uid_t si_uid; /* Real user ID of sending process. */
468 sigval_t si_sigval; /* Signal value. */
474 __pid_t si_pid; /* Which child. */
475 int si_status; /* Exit value or signal. */
480 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS. */
483 void *si_addr; /* Faulting insn/memory ref. */
489 int si_band; /* Band event for SIGPOLL. */
495 #define si_pid _sifields._kill.si_pid
496 #define si_uid _sifields._kill.si_uid
497 #define si_status _sifields._sigchld.si_status
498 #define si_utime _sifields._sigchld.si_utime
499 #define si_stime _sifields._sigchld.si_stime
500 #define si_value _sifields._rt.si_sigval
501 #define si_int _sifields._rt.si_sigval.sival_int
502 #define si_ptr _sifields._rt.si_sigval.sival_ptr
503 #define si_addr _sifields._sigfault.si_addr
504 #define si_band _sifields._sigpoll.si_band
505 #define si_fd _sifields._sigpoll.si_fd
509 static const struct xlat siginfo_codes[] = {
511 { SI_KERNEL, "SI_KERNEL" },
514 { SI_USER, "SI_USER" },
517 { SI_QUEUE, "SI_QUEUE" },
520 { SI_TIMER, "SI_TIMER" },
523 { SI_MESGQ, "SI_MESGQ" },
526 { SI_ASYNCIO, "SI_ASYNCIO" },
529 { SI_SIGIO, "SI_SIGIO" },
532 { SI_TKILL, "SI_TKILL" },
535 { SI_ASYNCNL, "SI_ASYNCNL" },
538 { SI_NOINFO, "SI_NOINFO" },
541 { SI_LWP, "SI_LWP" },
546 static const struct xlat sigill_codes[] = {
547 { ILL_ILLOPC, "ILL_ILLOPC" },
548 { ILL_ILLOPN, "ILL_ILLOPN" },
549 { ILL_ILLADR, "ILL_ILLADR" },
550 { ILL_ILLTRP, "ILL_ILLTRP" },
551 { ILL_PRVOPC, "ILL_PRVOPC" },
552 { ILL_PRVREG, "ILL_PRVREG" },
553 { ILL_COPROC, "ILL_COPROC" },
554 { ILL_BADSTK, "ILL_BADSTK" },
558 static const struct xlat sigfpe_codes[] = {
559 { FPE_INTDIV, "FPE_INTDIV" },
560 { FPE_INTOVF, "FPE_INTOVF" },
561 { FPE_FLTDIV, "FPE_FLTDIV" },
562 { FPE_FLTOVF, "FPE_FLTOVF" },
563 { FPE_FLTUND, "FPE_FLTUND" },
564 { FPE_FLTRES, "FPE_FLTRES" },
565 { FPE_FLTINV, "FPE_FLTINV" },
566 { FPE_FLTSUB, "FPE_FLTSUB" },
570 static const struct xlat sigtrap_codes[] = {
571 { TRAP_BRKPT, "TRAP_BRKPT" },
572 { TRAP_TRACE, "TRAP_TRACE" },
576 static const struct xlat sigchld_codes[] = {
577 { CLD_EXITED, "CLD_EXITED" },
578 { CLD_KILLED, "CLD_KILLED" },
579 { CLD_DUMPED, "CLD_DUMPED" },
580 { CLD_TRAPPED, "CLD_TRAPPED" },
581 { CLD_STOPPED, "CLD_STOPPED" },
582 { CLD_CONTINUED,"CLD_CONTINUED" },
586 static const struct xlat sigpoll_codes[] = {
587 { POLL_IN, "POLL_IN" },
588 { POLL_OUT, "POLL_OUT" },
589 { POLL_MSG, "POLL_MSG" },
590 { POLL_ERR, "POLL_ERR" },
591 { POLL_PRI, "POLL_PRI" },
592 { POLL_HUP, "POLL_HUP" },
596 static const struct xlat sigprof_codes[] = {
598 { PROF_SIG, "PROF_SIG" },
604 static const struct xlat sigemt_codes[] = {
606 { EMT_TAGOVF, "EMT_TAGOVF" },
612 static const struct xlat sigsegv_codes[] = {
613 { SEGV_MAPERR, "SEGV_MAPERR" },
614 { SEGV_ACCERR, "SEGV_ACCERR" },
618 static const struct xlat sigbus_codes[] = {
619 { BUS_ADRALN, "BUS_ADRALN" },
620 { BUS_ADRERR, "BUS_ADRERR" },
621 { BUS_OBJERR, "BUS_OBJERR" },
626 printsiginfo(siginfo_t *sip, int verbose)
630 if (sip->si_signo == 0) {
634 tprints("{si_signo=");
635 printsignal(sip->si_signo);
636 code = xlookup(siginfo_codes, sip->si_code);
638 switch (sip->si_signo) {
640 code = xlookup(sigtrap_codes, sip->si_code);
643 code = xlookup(sigchld_codes, sip->si_code);
646 code = xlookup(sigpoll_codes, sip->si_code);
649 code = xlookup(sigprof_codes, sip->si_code);
652 code = xlookup(sigill_codes, sip->si_code);
656 code = xlookup(sigemt_codes, sip->si_code);
660 code = xlookup(sigfpe_codes, sip->si_code);
663 code = xlookup(sigsegv_codes, sip->si_code);
666 code = xlookup(sigbus_codes, sip->si_code);
671 tprintf(", si_code=%s", code);
673 tprintf(", si_code=%#x", sip->si_code);
675 if (sip->si_code != SI_NOINFO)
679 if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
680 tprintf(", si_errno=%d", sip->si_errno);
682 tprintf(", si_errno=%s",
683 errnoent[sip->si_errno]);
686 if (SI_FROMUSER(sip)) {
687 tprintf(", si_pid=%lu, si_uid=%lu",
688 (unsigned long) sip->si_pid,
689 (unsigned long) sip->si_uid);
690 switch (sip->si_code) {
701 tprintf(", si_value=%d", sip->si_int);
710 tprintf(", si_value={int=%u, ptr=%#lx}",
712 (unsigned long) sip->si_ptr);
717 #endif /* SI_FROMUSER */
719 switch (sip->si_signo) {
721 tprintf(", si_pid=%ld, si_status=",
723 if (sip->si_code == CLD_EXITED)
724 tprintf("%d", sip->si_status);
726 printsignal(sip->si_status);
730 tprintf(", si_utime=%lu, si_stime=%lu",
734 case SIGILL: case SIGFPE:
735 case SIGSEGV: case SIGBUS:
736 tprintf(", si_addr=%#lx",
737 (unsigned long) sip->si_addr);
740 switch (sip->si_code) {
741 case POLL_IN: case POLL_OUT: case POLL_MSG:
742 tprintf(", si_band=%ld",
743 (long) sip->si_band);
748 if (sip->si_pid || sip->si_uid)
749 tprintf(", si_pid=%lu, si_uid=%lu",
750 (unsigned long) sip->si_pid,
751 (unsigned long) sip->si_uid);
757 tprintf(", si_value={int=%u, ptr=%#lx}",
759 (unsigned long) sip->si_ptr);
769 sys_sigsetmask(struct tcb *tcp)
773 long_to_sigset(tcp->u_arg[0], &sigm);
774 printsigmask(&sigm, 0);
776 else if (!syserror(tcp)) {
778 long_to_sigset(tcp->u_rval, &sigm);
779 tcp->auxstr = sprintsigmask("old mask ", &sigm, 0);
781 return RVAL_HEX | RVAL_STR;
786 #ifdef HAVE_SIGACTION
788 struct old_sigaction {
789 __sighandler_t __sa_handler;
790 unsigned long sa_mask;
791 unsigned long sa_flags;
792 void (*sa_restorer)(void);
794 #define SA_HANDLER __sa_handler
797 #define SA_HANDLER sa_handler
801 sys_sigaction(struct tcb *tcp)
805 struct old_sigaction sa;
808 printsignal(tcp->u_arg[0]);
810 addr = tcp->u_arg[1];
812 addr = tcp->u_arg[2];
815 else if (!verbose(tcp))
816 tprintf("%#lx", addr);
817 else if (umove(tcp, addr, &sa) < 0)
820 /* Architectures using function pointers, like
821 * hppa, may need to manipulate the function pointer
822 * to compute the result of a comparison. However,
823 * the SA_HANDLER function pointer exists only in
824 * the address space of the traced process, and can't
825 * be manipulated by strace. In order to prevent the
826 * compiler from generating code to manipulate
827 * SA_HANDLER we cast the function pointers to long. */
828 if ((long)sa.SA_HANDLER == (long)SIG_ERR)
829 tprints("{SIG_ERR, ");
830 else if ((long)sa.SA_HANDLER == (long)SIG_DFL)
831 tprints("{SIG_DFL, ");
832 else if ((long)sa.SA_HANDLER == (long)SIG_IGN)
833 tprints("{SIG_IGN, ");
835 tprintf("{%#lx, ", (long) sa.SA_HANDLER);
836 long_to_sigset(sa.sa_mask, &sigset);
837 printsigmask(&sigset, 0);
839 printflags(sigact_flags, sa.sa_flags, "SA_???");
841 if (sa.sa_flags & SA_RESTORER)
842 tprintf(", %p", sa.sa_restorer);
849 tprintf(", %#lx", (unsigned long) sa.sa_restorer);
854 sys_signal(struct tcb *tcp)
857 printsignal(tcp->u_arg[0]);
859 switch (tcp->u_arg[1]) {
870 tprintf("%#lx", tcp->u_arg[1]);
874 else if (!syserror(tcp)) {
875 switch (tcp->u_rval) {
877 tcp->auxstr = "SIG_ERR"; break;
879 tcp->auxstr = "SIG_DFL"; break;
881 tcp->auxstr = "SIG_IGN"; break;
885 return RVAL_HEX | RVAL_STR;
890 #endif /* HAVE_SIGACTION */
893 sys_sigreturn(struct tcb *tcp)
898 struct sigcontext_struct sc;
900 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (void *)®s) == -1)
902 if (umove(tcp, regs.ARM_sp, &sc) < 0)
904 long_to_sigset(sc.oldmask, &sigm);
905 tprints(sprintsigmask(") (mask ", &sigm, 0));
908 #elif defined(S390) || defined(S390X)
911 struct sigcontext_struct sc;
912 if (upeek(tcp, PT_GPR15, &usp) < 0)
914 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
916 tprints(sprintsigmask(") (mask ", (sigset_t *)&sc.oldmask[0], 0));
921 struct sigcontext_struct sc;
922 /* Note: on i386, sc is followed on stack by struct fpstate
923 * and after it an additional u32 extramask[1] which holds
924 * upper half of the mask. We can fetch it there
925 * if/when we'd want to display the full mask...
928 if (umove(tcp, i386_regs.esp, &sc) < 0)
930 long_to_sigset(sc.oldmask, &sigm);
931 tprints(sprintsigmask(") (mask ", &sigm, 0));
936 struct sigcontext sc;
939 /* offset of sigcontext in the kernel's sigframe structure: */
940 # define SIGFRAME_SC_OFFSET 0x90
941 if (upeek(tcp, PT_R12, &sp) < 0)
943 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
946 memcpy(&sigm, &sc.sc_mask, NSIG / 8);
947 tprints(sprintsigmask(") (mask ", &sigm, 0));
950 #elif defined(POWERPC)
953 struct sigcontext_struct sc;
955 if (upeek(tcp, sizeof(unsigned long) * PT_R1, &esp) < 0)
957 /* Skip dummy stack frame. */
959 if (current_personality == 0)
966 if (umove(tcp, esp, &sc) < 0)
968 long_to_sigset(sc.oldmask, &sigm);
969 tprints(sprintsigmask(") (mask ", &sigm, 0));
975 struct sigcontext sc;
977 if (upeek(tcp, 4*PT_USP, &usp) < 0)
979 if (umove(tcp, usp, &sc) < 0)
981 long_to_sigset(sc.sc_mask, &sigm);
982 tprints(sprintsigmask(") (mask ", &sigm, 0));
988 struct sigcontext_struct sc;
990 if (upeek(tcp, REG_FP, &fp) < 0)
992 if (umove(tcp, fp, &sc) < 0)
994 long_to_sigset(sc.sc_mask, &sigm);
995 tprints(sprintsigmask(") (mask ", &sigm, 0));
998 #elif defined(SPARC) || defined(SPARC64)
1001 struct pt_regs regs;
1004 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1005 perror("sigreturn: PTRACE_GETREGS");
1008 i1 = regs.u_regs[U_REG_O1];
1009 if (umove(tcp, i1, &si) < 0) {
1010 perror("sigreturn: umove");
1013 long_to_sigset(si.si_mask, &sigm);
1014 tprints(sprintsigmask(") (mask ", &sigm, 0));
1017 #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
1018 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
1020 if (entering(tcp)) {
1024 if (upeek(tcp, REG_SP, &sp) < 0)
1026 /* There are six words followed by a 128-byte siginfo. */
1027 sp = sp + 6 * 4 + 128;
1028 if (umove(tcp, sp, &uc) < 0)
1030 long_to_sigset(*(long *) &uc.uc_sigmask, &sigm);
1031 tprints(sprintsigmask(") (mask ", &sigm, 0));
1035 if (entering(tcp)) {
1037 struct pt_regs regs;
1040 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1041 perror("sigreturn: PTRACE_GETREGS");
1045 if (umove(tcp, sp, &si) < 0)
1047 long_to_sigset(si.si_mask, &sigm);
1048 tprints(sprintsigmask(") (mask ", &sigm, 0));
1051 #elif defined(CRISV10) || defined(CRISV32)
1052 if (entering(tcp)) {
1053 struct sigcontext sc;
1054 long regs[PT_MAX+1];
1056 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
1057 perror("sigreturn: PTRACE_GETREGS");
1060 if (umove(tcp, regs[PT_USP], &sc) < 0)
1062 long_to_sigset(sc.oldmask, &sigm);
1063 tprints(sprintsigmask(") (mask ", &sigm, 0));
1067 if (entering(tcp)) {
1072 /* offset of ucontext in the kernel's sigframe structure */
1073 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(struct siginfo)
1074 if (upeek(tcp, PTREGS_OFFSET_SP, &sp) < 0)
1076 if (umove(tcp, sp + SIGFRAME_UC_OFFSET, &uc) < 0)
1079 memcpy(&sigm, &uc.uc_sigmask, NSIG / 8);
1080 tprints(sprintsigmask(") (mask ", &sigm, 0));
1083 #elif defined(MICROBLAZE)
1084 /* TODO: Verify that this is correct... */
1085 if (entering(tcp)) {
1086 struct sigcontext sc;
1089 /* Read r1, the stack pointer. */
1090 if (upeek(tcp, 1 * 4, &sp) < 0)
1092 if (umove(tcp, sp, &sc) < 0)
1094 long_to_sigset(sc.oldmask, &sigm);
1095 tprints(sprintsigmask(") (mask ", &sigm, 0));
1099 #warning No sys_sigreturn() for this architecture
1100 #warning (no problem, just a reminder :-)
1106 sys_siggetmask(struct tcb *tcp)
1110 long_to_sigset(tcp->u_rval, &sigm);
1111 tcp->auxstr = sprintsigmask("mask ", &sigm, 0);
1113 return RVAL_HEX | RVAL_STR;
1117 sys_sigsuspend(struct tcb *tcp)
1119 if (entering(tcp)) {
1121 long_to_sigset(tcp->u_arg[2], &sigm);
1122 printsigmask(&sigm, 0);
1127 #if !defined SS_ONSTACK
1128 #define SS_ONSTACK 1
1129 #define SS_DISABLE 2
1130 #if __GLIBC_MINOR__ == 0
1140 static const struct xlat sigaltstack_flags[] = {
1141 { SS_ONSTACK, "SS_ONSTACK" },
1142 { SS_DISABLE, "SS_DISABLE" },
1147 print_stack_t(struct tcb *tcp, unsigned long addr)
1150 if (umove(tcp, addr, &ss) < 0)
1152 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1153 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1154 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1159 sys_sigaltstack(struct tcb *tcp)
1161 if (entering(tcp)) {
1162 if (tcp->u_arg[0] == 0)
1164 else if (print_stack_t(tcp, tcp->u_arg[0]) < 0)
1169 if (tcp->u_arg[1] == 0)
1171 else if (print_stack_t(tcp, tcp->u_arg[1]) < 0)
1177 #ifdef HAVE_SIGACTION
1180 sys_sigprocmask(struct tcb *tcp)
1183 if (entering(tcp)) {
1184 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1186 printsigmask(tcp->u_arg[1], 0);
1188 else if (!syserror(tcp)) {
1189 tcp->auxstr = sprintsigmask("old mask ", tcp->u_rval, 0);
1190 return RVAL_HEX | RVAL_STR;
1193 if (entering(tcp)) {
1194 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1196 print_sigset(tcp, tcp->u_arg[1], 0);
1202 else if (syserror(tcp))
1203 tprintf("%#lx", tcp->u_arg[2]);
1205 print_sigset(tcp, tcp->u_arg[2], 0);
1211 #endif /* HAVE_SIGACTION */
1214 sys_kill(struct tcb *tcp)
1216 if (entering(tcp)) {
1217 long pid = tcp->u_arg[0];
1218 #if SUPPORTED_PERSONALITIES > 1
1219 /* Sign-extend a 32-bit value when that's what it is. */
1220 if (personality_wordsize[current_personality] < sizeof pid)
1221 pid = (long) (int) pid;
1223 tprintf("%ld, %s", pid, signame(tcp->u_arg[1]));
1229 sys_tgkill(struct tcb *tcp)
1231 if (entering(tcp)) {
1232 tprintf("%ld, %ld, %s",
1233 tcp->u_arg[0], tcp->u_arg[1], signame(tcp->u_arg[2]));
1239 sys_sigpending(struct tcb *tcp)
1245 tprintf("%#lx", tcp->u_arg[0]);
1246 else if (copy_sigset(tcp, tcp->u_arg[0], &sigset) < 0)
1249 printsigmask(&sigset, 0);
1255 sys_rt_sigprocmask(struct tcb *tcp)
1259 /* Note: arg[3] is the length of the sigset. */
1260 if (entering(tcp)) {
1261 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1265 else if (copy_sigset_len(tcp, tcp->u_arg[1], &sigset, tcp->u_arg[3]) < 0)
1266 tprintf("%#lx, ", tcp->u_arg[1]);
1268 printsigmask(&sigset, 1);
1275 else if (syserror(tcp))
1276 tprintf("%#lx", tcp->u_arg[2]);
1277 else if (copy_sigset_len(tcp, tcp->u_arg[2], &sigset, tcp->u_arg[3]) < 0)
1280 printsigmask(&sigset, 1);
1281 tprintf(", %lu", tcp->u_arg[3]);
1286 /* Structure describing the action to be taken when a signal arrives. */
1287 struct new_sigaction
1289 __sighandler_t __sa_handler;
1290 unsigned long sa_flags;
1291 void (*sa_restorer) (void);
1292 /* Kernel treats sa_mask as an array of longs. */
1293 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1295 /* Same for i386-on-x86_64 and similar cases */
1296 struct new_sigaction32
1298 uint32_t __sa_handler;
1300 uint32_t sa_restorer;
1301 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1305 sys_rt_sigaction(struct tcb *tcp)
1307 struct new_sigaction sa;
1312 if (entering(tcp)) {
1313 printsignal(tcp->u_arg[0]);
1315 addr = tcp->u_arg[1];
1317 addr = tcp->u_arg[2];
1323 if (!verbose(tcp)) {
1324 tprintf("%#lx", addr);
1327 #if SUPPORTED_PERSONALITIES > 1
1328 if (personality_wordsize[current_personality] != sizeof(sa.sa_flags)
1329 && personality_wordsize[current_personality] == 4
1331 struct new_sigaction32 sa32;
1332 r = umove(tcp, addr, &sa32);
1334 memset(&sa, 0, sizeof(sa));
1335 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1336 sa.sa_flags = sa32.sa_flags;
1337 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1338 /* Kernel treats sa_mask as an array of longs.
1339 * For 32-bit process, "long" is uint32_t, thus, for example,
1340 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1341 * But for (64-bit) kernel, 32th bit in sa_mask is
1342 * 32th bit in 0th (64-bit) long!
1343 * For little-endian, it's the same.
1344 * For big-endian, we swap 32-bit words.
1346 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1351 r = umove(tcp, addr, &sa);
1357 /* Architectures using function pointers, like
1358 * hppa, may need to manipulate the function pointer
1359 * to compute the result of a comparison. However,
1360 * the SA_HANDLER function pointer exists only in
1361 * the address space of the traced process, and can't
1362 * be manipulated by strace. In order to prevent the
1363 * compiler from generating code to manipulate
1364 * SA_HANDLER we cast the function pointers to long. */
1365 if ((long)sa.__sa_handler == (long)SIG_ERR)
1366 tprints("{SIG_ERR, ");
1367 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1368 tprints("{SIG_DFL, ");
1369 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1370 tprints("{SIG_IGN, ");
1372 tprintf("{%#lx, ", (long) sa.__sa_handler);
1373 /* Questionable code below.
1374 * Kernel won't handle sys_rt_sigaction
1375 * with wrong sigset size (just returns EINVAL)
1376 * therefore tcp->u_arg[3(4)] _must_ be NSIG / 8 here,
1377 * and we always use smaller memcpy. */
1378 sigemptyset(&sigset);
1380 if (tcp->u_arg[4] <= sizeof(sigset))
1381 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[4]);
1383 if (tcp->u_arg[3] <= sizeof(sigset))
1384 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[3]);
1387 memcpy(&sigset, &sa.sa_mask, sizeof(sigset));
1388 printsigmask(&sigset, 1);
1390 printflags(sigact_flags, sa.sa_flags, "SA_???");
1392 if (sa.sa_flags & SA_RESTORER)
1393 tprintf(", %p", sa.sa_restorer);
1402 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1403 #elif defined(ALPHA)
1404 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1406 tprintf(", %lu", tcp->u_arg[3]);
1412 sys_rt_sigpending(struct tcb *tcp)
1418 tprintf("%#lx", tcp->u_arg[0]);
1419 else if (copy_sigset_len(tcp, tcp->u_arg[0],
1420 &sigset, tcp->u_arg[1]) < 0)
1423 printsigmask(&sigset, 1);
1429 sys_rt_sigsuspend(struct tcb *tcp)
1431 if (entering(tcp)) {
1433 if (copy_sigset_len(tcp, tcp->u_arg[0], &sigm, tcp->u_arg[1]) < 0)
1436 printsigmask(&sigm, 1);
1442 print_sigqueueinfo(struct tcb *tcp, int sig, unsigned long uinfo)
1448 if (umove(tcp, uinfo, &si) < 0)
1449 tprintf("%#lx", uinfo);
1451 printsiginfo(&si, verbose(tcp));
1455 sys_rt_sigqueueinfo(struct tcb *tcp)
1457 if (entering(tcp)) {
1458 tprintf("%lu, ", tcp->u_arg[0]);
1459 print_sigqueueinfo(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1465 sys_rt_tgsigqueueinfo(struct tcb *tcp)
1467 if (entering(tcp)) {
1468 tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
1469 print_sigqueueinfo(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1474 int sys_rt_sigtimedwait(struct tcb *tcp)
1476 if (entering(tcp)) {
1479 if (copy_sigset_len(tcp, tcp->u_arg[0],
1480 &sigset, tcp->u_arg[3]) < 0)
1483 printsigmask(&sigset, 1);
1485 /* This is the only "return" parameter, */
1486 if (tcp->u_arg[1] != 0)
1488 /* ... if it's NULL, can decode all on entry */
1491 else if (tcp->u_arg[1] != 0) {
1492 /* syscall exit, and u_arg[1] wasn't NULL */
1494 tprintf("%#lx, ", tcp->u_arg[1]);
1497 if (umove(tcp, tcp->u_arg[1], &si) < 0)
1498 tprintf("%#lx, ", tcp->u_arg[1]);
1500 printsiginfo(&si, verbose(tcp));
1506 /* syscall exit, and u_arg[1] was NULL */
1509 print_timespec(tcp, tcp->u_arg[2]);
1510 tprintf(", %d", (int) tcp->u_arg[3]);
1515 sys_restart_syscall(struct tcb *tcp)
1518 tprints("<... resuming interrupted call ...>");
1523 do_signalfd(struct tcb *tcp, int flags_arg)
1525 if (entering(tcp)) {
1526 printfd(tcp, tcp->u_arg[0]);
1528 print_sigset(tcp, tcp->u_arg[1], 1);
1529 tprintf(", %lu", tcp->u_arg[2]);
1530 if (flags_arg >= 0) {
1532 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1539 sys_signalfd(struct tcb *tcp)
1541 return do_signalfd(tcp, -1);
1545 sys_signalfd4(struct tcb *tcp)
1547 return do_signalfd(tcp, 3);