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.
45 # ifndef PTRACE_PEEKUSR
46 # define PTRACE_PEEKUSR PTRACE_PEEKUSER
48 # ifndef PTRACE_POKEUSR
49 # define PTRACE_POKEUSR PTRACE_POKEUSER
51 #elif defined(HAVE_LINUX_PTRACE_H)
52 # undef PTRACE_SYSCALL
53 # ifdef HAVE_STRUCT_IA64_FPREG
54 # define ia64_fpreg XXX_ia64_fpreg
56 # ifdef HAVE_STRUCT_PT_ALL_USER_REGS
57 # define pt_all_user_regs XXX_pt_all_user_regs
59 # include <linux/ptrace.h>
61 # undef pt_all_user_regs
65 # include <asm/ptrace_offsets.h>
69 # undef PTRACE_GETREGS
70 # define PTRACE_GETREGS PTRACE_GETREGS64
71 # undef PTRACE_SETREGS
72 # define PTRACE_SETREGS PTRACE_SETREGS64
75 #if defined(SPARC) || defined(SPARC64) || defined(MIPS)
77 struct pt_regs si_regs;
80 #elif defined HAVE_ASM_SIGCONTEXT_H
81 # if !defined(IA64) && !defined(X86_64)
82 # include <asm/sigcontext.h>
83 # endif /* !IA64 && !X86_64 */
84 #else /* !HAVE_ASM_SIGCONTEXT_H */
85 # if defined I386 && !defined HAVE_STRUCT_SIGCONTEXT_STRUCT
86 struct sigcontext_struct {
87 unsigned short gs, __gsh;
88 unsigned short fs, __fsh;
89 unsigned short es, __esh;
90 unsigned short ds, __dsh;
102 unsigned short cs, __csh;
103 unsigned long eflags;
104 unsigned long esp_at_signal;
105 unsigned short ss, __ssh;
107 unsigned long oldmask;
111 # if defined M68K && !defined HAVE_STRUCT_SIGCONTEXT
114 unsigned long sc_mask;
115 unsigned long sc_usp;
120 unsigned short sc_sr;
122 unsigned short sc_formatvec;
126 #endif /* !HAVE_ASM_SIGCONTEXT_H */
129 # warning: NSIG is not defined, using 32
133 /* Ugh. Is this really correct? ARM has no RT signals?! */
138 #ifdef HAVE_SIGACTION
140 #if defined(I386) || defined(X86_64)
141 /* The libc headers do not define this constant since it should only be
142 used by the implementation. So we define it here. */
144 # define SA_RESTORER 0x04000000
148 static const struct xlat sigact_flags[] = {
150 { SA_RESTORER, "SA_RESTORER" },
153 { SA_STACK, "SA_STACK" },
156 { SA_RESTART, "SA_RESTART" },
159 { SA_INTERRUPT, "SA_INTERRUPT" },
162 { SA_NODEFER, "SA_NODEFER" },
164 #if defined SA_NOMASK && SA_NODEFER != SA_NOMASK
165 { SA_NOMASK, "SA_NOMASK" },
168 { SA_RESETHAND, "SA_RESETHAND" },
170 #if defined SA_ONESHOT && SA_ONESHOT != SA_RESETHAND
171 { SA_ONESHOT, "SA_ONESHOT" },
174 { SA_SIGINFO, "SA_SIGINFO" },
177 { SA_RESETHAND, "SA_RESETHAND" },
180 { SA_ONSTACK, "SA_ONSTACK" },
183 { SA_NODEFER, "SA_NODEFER" },
186 { SA_NOCLDSTOP, "SA_NOCLDSTOP" },
189 { SA_NOCLDWAIT, "SA_NOCLDWAIT" },
192 { _SA_BSDCALL, "_SA_BSDCALL" },
195 { SA_NOPTRACE, "SA_NOPTRACE" },
200 static const struct xlat sigprocmaskcmds[] = {
201 { SIG_BLOCK, "SIG_BLOCK" },
202 { SIG_UNBLOCK, "SIG_UNBLOCK" },
203 { SIG_SETMASK, "SIG_SETMASK" },
205 { SIG_SETMASK32,"SIG_SETMASK32" },
210 #endif /* HAVE_SIGACTION */
212 /* Anonymous realtime signals. */
213 /* Under glibc 2.1, SIGRTMIN et al are functions, but __SIGRTMIN is a
214 constant. This is what we want. Otherwise, just use SIGRTMIN. */
217 #define __SIGRTMIN SIGRTMIN
218 #define __SIGRTMAX SIGRTMAX /* likewise */
222 /* Note on the size of sigset_t:
224 * In glibc, sigset_t is an array with space for 1024 bits (!),
225 * even though all arches supported by Linux have only 64 signals
226 * except MIPS, which has 128. IOW, it is 128 bytes long.
228 * In-kernel sigset_t is sized correctly (it is either 64 or 128 bit long).
229 * However, some old syscall return only 32 lower bits (one word).
230 * Example: sys_sigpending vs sys_rt_sigpending.
232 * Be aware of this fact when you try to
233 * memcpy(&tcp->u_arg[1], &something, sizeof(sigset_t))
234 * - sizeof(sigset_t) is much bigger than you think,
235 * it may overflow tcp->u_arg[] array, and it may try to copy more data
236 * than is really available in <something>.
238 * umoven(tcp, addr, sizeof(sigset_t), &sigset)
239 * may be a bad idea: it'll try to read much more data than needed
240 * to fetch a sigset_t.
241 * Use (NSIG / 8) as a size instead.
247 static char buf[sizeof("SIGRT_%d") + sizeof(int)*3];
249 if (sig >= 0 && sig < nsignals)
250 return signalent[sig];
252 if (sig >= __SIGRTMIN && sig <= __SIGRTMAX) {
253 sprintf(buf, "SIGRT_%d", (int)(sig - __SIGRTMIN));
257 sprintf(buf, "%d", sig);
262 long_to_sigset(long l, sigset_t *s)
269 copy_sigset_len(struct tcb *tcp, long addr, sigset_t *s, int len)
271 if (len > sizeof(*s))
274 if (umoven(tcp, addr, len, (char *)s) < 0)
279 /* Original sigset is unsigned long */
280 #define copy_sigset(tcp, addr, s) copy_sigset_len(tcp, addr, s, sizeof(long))
283 sprintsigmask(const char *str, sigset_t *mask, int rt)
284 /* set might include realtime sigs */
286 /* Was [8 * sizeof(sigset_t) * 8], but
287 * glibc sigset_t is huge (1024 bits = 128 *bytes*),
288 * and we were ending up with 8k (!) buffer here.
290 * No Unix system can have sig > 255
291 * (waitpid API won't be able to indicate death from one)
292 * and sig 0 doesn't exist either.
293 * Therefore max possible no of sigs is 255: 1..255
295 static char outstr[8 * (255 * 2 / 3)];
306 maxsigs = __SIGRTMAX; /* instead */
308 s = stpcpy(outstr, str);
310 for (i = 1; i < maxsigs; i++) {
311 if (sigismember(mask, i) == 1)
315 /* 1: show mask members, 0: show those which are NOT in mask */
316 show_members = (nsigs < nsignals * 2 / 3);
321 for (i = 1; i < maxsigs; i++) {
322 if (sigismember(mask, i) == show_members) {
323 /* real-time signals on solaris don't have
329 s = stpcpy(s, signalent[i] + 3);
332 else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
333 sprintf(tsig, "RT_%u", i - __SIGRTMIN);
336 #endif /* SIGRTMIN */
338 sprintf(tsig, "%u", i);
352 printsigmask(sigset_t *mask, int rt)
354 tprints(sprintsigmask("", mask, rt));
360 tprints(signame(nr));
364 print_sigset(struct tcb *tcp, long addr, int rt)
370 else if (copy_sigset(tcp, addr, &ss) < 0)
371 tprintf("%#lx", addr);
373 printsigmask(&ss, rt);
377 #define ILL_ILLOPC 1 /* illegal opcode */
378 #define ILL_ILLOPN 2 /* illegal operand */
379 #define ILL_ILLADR 3 /* illegal addressing mode */
380 #define ILL_ILLTRP 4 /* illegal trap */
381 #define ILL_PRVOPC 5 /* privileged opcode */
382 #define ILL_PRVREG 6 /* privileged register */
383 #define ILL_COPROC 7 /* coprocessor error */
384 #define ILL_BADSTK 8 /* internal stack error */
385 #define FPE_INTDIV 1 /* integer divide by zero */
386 #define FPE_INTOVF 2 /* integer overflow */
387 #define FPE_FLTDIV 3 /* floating point divide by zero */
388 #define FPE_FLTOVF 4 /* floating point overflow */
389 #define FPE_FLTUND 5 /* floating point underflow */
390 #define FPE_FLTRES 6 /* floating point inexact result */
391 #define FPE_FLTINV 7 /* floating point invalid operation */
392 #define FPE_FLTSUB 8 /* subscript out of range */
393 #define SEGV_MAPERR 1 /* address not mapped to object */
394 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */
395 #define BUS_ADRALN 1 /* invalid address alignment */
396 #define BUS_ADRERR 2 /* non-existant physical address */
397 #define BUS_OBJERR 3 /* object specific hardware error */
398 #define TRAP_BRKPT 1 /* process breakpoint */
399 #define TRAP_TRACE 2 /* process trace trap */
400 #define CLD_EXITED 1 /* child has exited */
401 #define CLD_KILLED 2 /* child was killed */
402 #define CLD_DUMPED 3 /* child terminated abnormally */
403 #define CLD_TRAPPED 4 /* traced child has trapped */
404 #define CLD_STOPPED 5 /* child has stopped */
405 #define CLD_CONTINUED 6 /* stopped child has continued */
406 #define POLL_IN 1 /* data input available */
407 #define POLL_OUT 2 /* output buffers available */
408 #define POLL_MSG 3 /* input message available */
409 #define POLL_ERR 4 /* i/o error */
410 #define POLL_PRI 5 /* high priority input available */
411 #define POLL_HUP 6 /* device disconnected */
412 #define SI_KERNEL 0x80 /* sent by kernel */
413 #define SI_USER 0 /* sent by kill, sigsend, raise */
414 #define SI_QUEUE -1 /* sent by sigqueue */
415 #define SI_TIMER -2 /* sent by timer expiration */
416 #define SI_MESGQ -3 /* sent by real time mesq state change */
417 #define SI_ASYNCIO -4 /* sent by AIO completion */
418 #define SI_SIGIO -5 /* sent by SIGIO */
419 #define SI_TKILL -6 /* sent by tkill */
420 #define SI_ASYNCNL -60 /* sent by asynch name lookup completion */
422 #define SI_FROMUSER(sip) ((sip)->si_code <= 0)
426 #if __GLIBC_MINOR__ < 1
427 /* Type for data associated with a signal. */
434 # define __SI_MAX_SIZE 128
435 # define __SI_PAD_SIZE ((__SI_MAX_SIZE / sizeof(int)) - 3)
437 typedef struct siginfo
439 int si_signo; /* Signal number. */
440 int si_errno; /* If non-zero, an errno value associated with
441 this signal, as defined in <errno.h>. */
442 int si_code; /* Signal code. */
446 int _pad[__SI_PAD_SIZE];
451 __pid_t si_pid; /* Sending process ID. */
452 __uid_t si_uid; /* Real user ID of sending process. */
455 /* POSIX.1b timers. */
458 unsigned int _timer1;
459 unsigned int _timer2;
462 /* POSIX.1b signals. */
465 __pid_t si_pid; /* Sending process ID. */
466 __uid_t si_uid; /* Real user ID of sending process. */
467 sigval_t si_sigval; /* Signal value. */
473 __pid_t si_pid; /* Which child. */
474 int si_status; /* Exit value or signal. */
479 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS. */
482 void *si_addr; /* Faulting insn/memory ref. */
488 int si_band; /* Band event for SIGPOLL. */
494 #define si_pid _sifields._kill.si_pid
495 #define si_uid _sifields._kill.si_uid
496 #define si_status _sifields._sigchld.si_status
497 #define si_utime _sifields._sigchld.si_utime
498 #define si_stime _sifields._sigchld.si_stime
499 #define si_value _sifields._rt.si_sigval
500 #define si_int _sifields._rt.si_sigval.sival_int
501 #define si_ptr _sifields._rt.si_sigval.sival_ptr
502 #define si_addr _sifields._sigfault.si_addr
503 #define si_band _sifields._sigpoll.si_band
504 #define si_fd _sifields._sigpoll.si_fd
508 static const struct xlat siginfo_codes[] = {
510 { SI_KERNEL, "SI_KERNEL" },
513 { SI_USER, "SI_USER" },
516 { SI_QUEUE, "SI_QUEUE" },
519 { SI_TIMER, "SI_TIMER" },
522 { SI_MESGQ, "SI_MESGQ" },
525 { SI_ASYNCIO, "SI_ASYNCIO" },
528 { SI_SIGIO, "SI_SIGIO" },
531 { SI_TKILL, "SI_TKILL" },
534 { SI_ASYNCNL, "SI_ASYNCNL" },
537 { SI_NOINFO, "SI_NOINFO" },
540 { SI_LWP, "SI_LWP" },
545 static const struct xlat sigill_codes[] = {
546 { ILL_ILLOPC, "ILL_ILLOPC" },
547 { ILL_ILLOPN, "ILL_ILLOPN" },
548 { ILL_ILLADR, "ILL_ILLADR" },
549 { ILL_ILLTRP, "ILL_ILLTRP" },
550 { ILL_PRVOPC, "ILL_PRVOPC" },
551 { ILL_PRVREG, "ILL_PRVREG" },
552 { ILL_COPROC, "ILL_COPROC" },
553 { ILL_BADSTK, "ILL_BADSTK" },
557 static const struct xlat sigfpe_codes[] = {
558 { FPE_INTDIV, "FPE_INTDIV" },
559 { FPE_INTOVF, "FPE_INTOVF" },
560 { FPE_FLTDIV, "FPE_FLTDIV" },
561 { FPE_FLTOVF, "FPE_FLTOVF" },
562 { FPE_FLTUND, "FPE_FLTUND" },
563 { FPE_FLTRES, "FPE_FLTRES" },
564 { FPE_FLTINV, "FPE_FLTINV" },
565 { FPE_FLTSUB, "FPE_FLTSUB" },
569 static const struct xlat sigtrap_codes[] = {
570 { TRAP_BRKPT, "TRAP_BRKPT" },
571 { TRAP_TRACE, "TRAP_TRACE" },
575 static const struct xlat sigchld_codes[] = {
576 { CLD_EXITED, "CLD_EXITED" },
577 { CLD_KILLED, "CLD_KILLED" },
578 { CLD_DUMPED, "CLD_DUMPED" },
579 { CLD_TRAPPED, "CLD_TRAPPED" },
580 { CLD_STOPPED, "CLD_STOPPED" },
581 { CLD_CONTINUED,"CLD_CONTINUED" },
585 static const struct xlat sigpoll_codes[] = {
586 { POLL_IN, "POLL_IN" },
587 { POLL_OUT, "POLL_OUT" },
588 { POLL_MSG, "POLL_MSG" },
589 { POLL_ERR, "POLL_ERR" },
590 { POLL_PRI, "POLL_PRI" },
591 { POLL_HUP, "POLL_HUP" },
595 static const struct xlat sigprof_codes[] = {
597 { PROF_SIG, "PROF_SIG" },
603 static const struct xlat sigemt_codes[] = {
605 { EMT_TAGOVF, "EMT_TAGOVF" },
611 static const struct xlat sigsegv_codes[] = {
612 { SEGV_MAPERR, "SEGV_MAPERR" },
613 { SEGV_ACCERR, "SEGV_ACCERR" },
617 static const struct xlat sigbus_codes[] = {
618 { BUS_ADRALN, "BUS_ADRALN" },
619 { BUS_ADRERR, "BUS_ADRERR" },
620 { BUS_OBJERR, "BUS_OBJERR" },
625 printsiginfo(siginfo_t *sip, int verbose)
629 if (sip->si_signo == 0) {
633 tprints("{si_signo=");
634 printsignal(sip->si_signo);
635 code = xlookup(siginfo_codes, sip->si_code);
637 switch (sip->si_signo) {
639 code = xlookup(sigtrap_codes, sip->si_code);
642 code = xlookup(sigchld_codes, sip->si_code);
645 code = xlookup(sigpoll_codes, sip->si_code);
648 code = xlookup(sigprof_codes, sip->si_code);
651 code = xlookup(sigill_codes, sip->si_code);
655 code = xlookup(sigemt_codes, sip->si_code);
659 code = xlookup(sigfpe_codes, sip->si_code);
662 code = xlookup(sigsegv_codes, sip->si_code);
665 code = xlookup(sigbus_codes, sip->si_code);
670 tprintf(", si_code=%s", code);
672 tprintf(", si_code=%#x", sip->si_code);
674 if (sip->si_code != SI_NOINFO)
678 if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
679 tprintf(", si_errno=%d", sip->si_errno);
681 tprintf(", si_errno=%s",
682 errnoent[sip->si_errno]);
685 if (SI_FROMUSER(sip)) {
686 tprintf(", si_pid=%lu, si_uid=%lu",
687 (unsigned long) sip->si_pid,
688 (unsigned long) sip->si_uid);
689 switch (sip->si_code) {
700 tprintf(", si_value=%d", sip->si_int);
709 tprintf(", si_value={int=%u, ptr=%#lx}",
711 (unsigned long) sip->si_ptr);
716 #endif /* SI_FROMUSER */
718 switch (sip->si_signo) {
720 tprintf(", si_pid=%ld, si_status=",
722 if (sip->si_code == CLD_EXITED)
723 tprintf("%d", sip->si_status);
725 printsignal(sip->si_status);
729 tprintf(", si_utime=%lu, si_stime=%lu",
733 case SIGILL: case SIGFPE:
734 case SIGSEGV: case SIGBUS:
735 tprintf(", si_addr=%#lx",
736 (unsigned long) sip->si_addr);
739 switch (sip->si_code) {
740 case POLL_IN: case POLL_OUT: case POLL_MSG:
741 tprintf(", si_band=%ld",
742 (long) sip->si_band);
747 if (sip->si_pid || sip->si_uid)
748 tprintf(", si_pid=%lu, si_uid=%lu",
749 (unsigned long) sip->si_pid,
750 (unsigned long) sip->si_uid);
756 tprintf(", si_value={int=%u, ptr=%#lx}",
758 (unsigned long) sip->si_ptr);
768 sys_sigsetmask(struct tcb *tcp)
772 long_to_sigset(tcp->u_arg[0], &sigm);
773 printsigmask(&sigm, 0);
775 else if (!syserror(tcp)) {
777 long_to_sigset(tcp->u_rval, &sigm);
778 tcp->auxstr = sprintsigmask("old mask ", &sigm, 0);
780 return RVAL_HEX | RVAL_STR;
785 #ifdef HAVE_SIGACTION
787 struct old_sigaction {
788 __sighandler_t __sa_handler;
789 unsigned long sa_mask;
790 unsigned long sa_flags;
791 void (*sa_restorer)(void);
793 #define SA_HANDLER __sa_handler
796 #define SA_HANDLER sa_handler
800 sys_sigaction(struct tcb *tcp)
804 struct old_sigaction sa;
807 printsignal(tcp->u_arg[0]);
809 addr = tcp->u_arg[1];
811 addr = tcp->u_arg[2];
814 else if (!verbose(tcp))
815 tprintf("%#lx", addr);
816 else if (umove(tcp, addr, &sa) < 0)
819 /* Architectures using function pointers, like
820 * hppa, may need to manipulate the function pointer
821 * to compute the result of a comparison. However,
822 * the SA_HANDLER function pointer exists only in
823 * the address space of the traced process, and can't
824 * be manipulated by strace. In order to prevent the
825 * compiler from generating code to manipulate
826 * SA_HANDLER we cast the function pointers to long. */
827 if ((long)sa.SA_HANDLER == (long)SIG_ERR)
828 tprints("{SIG_ERR, ");
829 else if ((long)sa.SA_HANDLER == (long)SIG_DFL)
830 tprints("{SIG_DFL, ");
831 else if ((long)sa.SA_HANDLER == (long)SIG_IGN)
832 tprints("{SIG_IGN, ");
834 tprintf("{%#lx, ", (long) sa.SA_HANDLER);
835 long_to_sigset(sa.sa_mask, &sigset);
836 printsigmask(&sigset, 0);
838 printflags(sigact_flags, sa.sa_flags, "SA_???");
840 if (sa.sa_flags & SA_RESTORER)
841 tprintf(", %p", sa.sa_restorer);
848 tprintf(", %#lx", (unsigned long) sa.sa_restorer);
853 sys_signal(struct tcb *tcp)
856 printsignal(tcp->u_arg[0]);
858 switch (tcp->u_arg[1]) {
869 tprintf("%#lx", tcp->u_arg[1]);
873 else if (!syserror(tcp)) {
874 switch (tcp->u_rval) {
876 tcp->auxstr = "SIG_ERR"; break;
878 tcp->auxstr = "SIG_DFL"; break;
880 tcp->auxstr = "SIG_IGN"; break;
884 return RVAL_HEX | RVAL_STR;
889 #endif /* HAVE_SIGACTION */
892 sys_sigreturn(struct tcb *tcp)
897 struct sigcontext_struct sc;
899 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (void *)®s) == -1)
901 if (umove(tcp, regs.ARM_sp, &sc) < 0)
903 long_to_sigset(sc.oldmask, &sigm);
904 tprints(sprintsigmask(") (mask ", &sigm, 0));
907 #elif defined(S390) || defined(S390X)
910 struct sigcontext_struct sc;
911 if (upeek(tcp, PT_GPR15, &usp) < 0)
913 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
915 tprints(sprintsigmask(") (mask ", (sigset_t *)&sc.oldmask[0], 0));
920 struct sigcontext_struct sc;
921 /* Note: on i386, sc is followed on stack by struct fpstate
922 * and after it an additional u32 extramask[1] which holds
923 * upper half of the mask. We can fetch it there
924 * if/when we'd want to display the full mask...
927 if (umove(tcp, i386_regs.esp, &sc) < 0)
929 long_to_sigset(sc.oldmask, &sigm);
930 tprints(sprintsigmask(") (mask ", &sigm, 0));
935 struct sigcontext sc;
938 /* offset of sigcontext in the kernel's sigframe structure: */
939 # define SIGFRAME_SC_OFFSET 0x90
940 if (upeek(tcp, PT_R12, &sp) < 0)
942 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
945 memcpy(&sigm, &sc.sc_mask, NSIG / 8);
946 tprints(sprintsigmask(") (mask ", &sigm, 0));
949 #elif defined(POWERPC)
952 struct sigcontext_struct sc;
954 if (upeek(tcp, sizeof(unsigned long) * PT_R1, &esp) < 0)
956 /* Skip dummy stack frame. */
958 if (current_personality == 0)
965 if (umove(tcp, esp, &sc) < 0)
967 long_to_sigset(sc.oldmask, &sigm);
968 tprints(sprintsigmask(") (mask ", &sigm, 0));
974 struct sigcontext sc;
976 if (upeek(tcp, 4*PT_USP, &usp) < 0)
978 if (umove(tcp, usp, &sc) < 0)
980 long_to_sigset(sc.sc_mask, &sigm);
981 tprints(sprintsigmask(") (mask ", &sigm, 0));
987 struct sigcontext_struct sc;
989 if (upeek(tcp, REG_FP, &fp) < 0)
991 if (umove(tcp, fp, &sc) < 0)
993 long_to_sigset(sc.sc_mask, &sigm);
994 tprints(sprintsigmask(") (mask ", &sigm, 0));
997 #elif defined(SPARC) || defined(SPARC64)
1000 struct pt_regs regs;
1003 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1004 perror("sigreturn: PTRACE_GETREGS");
1007 i1 = regs.u_regs[U_REG_O1];
1008 if (umove(tcp, i1, &si) < 0) {
1009 perror("sigreturn: umove");
1012 long_to_sigset(si.si_mask, &sigm);
1013 tprints(sprintsigmask(") (mask ", &sigm, 0));
1016 #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
1017 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
1019 if (entering(tcp)) {
1023 if (upeek(tcp, REG_SP, &sp) < 0)
1025 /* There are six words followed by a 128-byte siginfo. */
1026 sp = sp + 6 * 4 + 128;
1027 if (umove(tcp, sp, &uc) < 0)
1029 long_to_sigset(*(long *) &uc.uc_sigmask, &sigm);
1030 tprints(sprintsigmask(") (mask ", &sigm, 0));
1034 if (entering(tcp)) {
1036 struct pt_regs regs;
1039 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1040 perror("sigreturn: PTRACE_GETREGS");
1044 if (umove(tcp, sp, &si) < 0)
1046 long_to_sigset(si.si_mask, &sigm);
1047 tprints(sprintsigmask(") (mask ", &sigm, 0));
1050 #elif defined(CRISV10) || defined(CRISV32)
1051 if (entering(tcp)) {
1052 struct sigcontext sc;
1053 long regs[PT_MAX+1];
1055 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
1056 perror("sigreturn: PTRACE_GETREGS");
1059 if (umove(tcp, regs[PT_USP], &sc) < 0)
1061 long_to_sigset(sc.oldmask, &sigm);
1062 tprints(sprintsigmask(") (mask ", &sigm, 0));
1066 if (entering(tcp)) {
1071 /* offset of ucontext in the kernel's sigframe structure */
1072 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(struct siginfo)
1073 if (upeek(tcp, PTREGS_OFFSET_SP, &sp) < 0)
1075 if (umove(tcp, sp + SIGFRAME_UC_OFFSET, &uc) < 0)
1078 memcpy(&sigm, &uc.uc_sigmask, NSIG / 8);
1079 tprints(sprintsigmask(") (mask ", &sigm, 0));
1082 #elif defined(MICROBLAZE)
1083 /* TODO: Verify that this is correct... */
1084 if (entering(tcp)) {
1085 struct sigcontext sc;
1088 /* Read r1, the stack pointer. */
1089 if (upeek(tcp, 1 * 4, &sp) < 0)
1091 if (umove(tcp, sp, &sc) < 0)
1093 long_to_sigset(sc.oldmask, &sigm);
1094 tprints(sprintsigmask(") (mask ", &sigm, 0));
1098 #warning No sys_sigreturn() for this architecture
1099 #warning (no problem, just a reminder :-)
1105 sys_siggetmask(struct tcb *tcp)
1109 long_to_sigset(tcp->u_rval, &sigm);
1110 tcp->auxstr = sprintsigmask("mask ", &sigm, 0);
1112 return RVAL_HEX | RVAL_STR;
1116 sys_sigsuspend(struct tcb *tcp)
1118 if (entering(tcp)) {
1120 long_to_sigset(tcp->u_arg[2], &sigm);
1121 printsigmask(&sigm, 0);
1126 #if !defined SS_ONSTACK
1127 #define SS_ONSTACK 1
1128 #define SS_DISABLE 2
1129 #if __GLIBC_MINOR__ == 0
1139 static const struct xlat sigaltstack_flags[] = {
1140 { SS_ONSTACK, "SS_ONSTACK" },
1141 { SS_DISABLE, "SS_DISABLE" },
1146 print_stack_t(struct tcb *tcp, unsigned long addr)
1149 if (umove(tcp, addr, &ss) < 0)
1151 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1152 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1153 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1158 sys_sigaltstack(struct tcb *tcp)
1160 if (entering(tcp)) {
1161 if (tcp->u_arg[0] == 0)
1163 else if (print_stack_t(tcp, tcp->u_arg[0]) < 0)
1168 if (tcp->u_arg[1] == 0)
1170 else if (print_stack_t(tcp, tcp->u_arg[1]) < 0)
1176 #ifdef HAVE_SIGACTION
1179 sys_sigprocmask(struct tcb *tcp)
1182 if (entering(tcp)) {
1183 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1185 printsigmask(tcp->u_arg[1], 0);
1187 else if (!syserror(tcp)) {
1188 tcp->auxstr = sprintsigmask("old mask ", tcp->u_rval, 0);
1189 return RVAL_HEX | RVAL_STR;
1192 if (entering(tcp)) {
1193 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1195 print_sigset(tcp, tcp->u_arg[1], 0);
1201 else if (syserror(tcp))
1202 tprintf("%#lx", tcp->u_arg[2]);
1204 print_sigset(tcp, tcp->u_arg[2], 0);
1210 #endif /* HAVE_SIGACTION */
1213 sys_kill(struct tcb *tcp)
1215 if (entering(tcp)) {
1216 long pid = tcp->u_arg[0];
1217 #if SUPPORTED_PERSONALITIES > 1
1218 /* Sign-extend a 32-bit value when that's what it is. */
1219 if (personality_wordsize[current_personality] < sizeof pid)
1220 pid = (long) (int) pid;
1222 tprintf("%ld, %s", pid, signame(tcp->u_arg[1]));
1228 sys_tgkill(struct tcb *tcp)
1230 if (entering(tcp)) {
1231 tprintf("%ld, %ld, %s",
1232 tcp->u_arg[0], tcp->u_arg[1], signame(tcp->u_arg[2]));
1238 sys_sigpending(struct tcb *tcp)
1244 tprintf("%#lx", tcp->u_arg[0]);
1245 else if (copy_sigset(tcp, tcp->u_arg[0], &sigset) < 0)
1248 printsigmask(&sigset, 0);
1254 sys_rt_sigprocmask(struct tcb *tcp)
1258 /* Note: arg[3] is the length of the sigset. */
1259 if (entering(tcp)) {
1260 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1264 else if (copy_sigset_len(tcp, tcp->u_arg[1], &sigset, tcp->u_arg[3]) < 0)
1265 tprintf("%#lx, ", tcp->u_arg[1]);
1267 printsigmask(&sigset, 1);
1274 else if (syserror(tcp))
1275 tprintf("%#lx", tcp->u_arg[2]);
1276 else if (copy_sigset_len(tcp, tcp->u_arg[2], &sigset, tcp->u_arg[3]) < 0)
1279 printsigmask(&sigset, 1);
1280 tprintf(", %lu", tcp->u_arg[3]);
1285 /* Structure describing the action to be taken when a signal arrives. */
1286 struct new_sigaction
1288 __sighandler_t __sa_handler;
1289 unsigned long sa_flags;
1290 void (*sa_restorer) (void);
1291 /* Kernel treats sa_mask as an array of longs. */
1292 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1294 /* Same for i386-on-x86_64 and similar cases */
1295 struct new_sigaction32
1297 uint32_t __sa_handler;
1299 uint32_t sa_restorer;
1300 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1304 sys_rt_sigaction(struct tcb *tcp)
1306 struct new_sigaction sa;
1311 if (entering(tcp)) {
1312 printsignal(tcp->u_arg[0]);
1314 addr = tcp->u_arg[1];
1316 addr = tcp->u_arg[2];
1322 if (!verbose(tcp)) {
1323 tprintf("%#lx", addr);
1326 #if SUPPORTED_PERSONALITIES > 1
1327 if (personality_wordsize[current_personality] != sizeof(sa.sa_flags)
1328 && personality_wordsize[current_personality] == 4
1330 struct new_sigaction32 sa32;
1331 r = umove(tcp, addr, &sa32);
1333 memset(&sa, 0, sizeof(sa));
1334 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1335 sa.sa_flags = sa32.sa_flags;
1336 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1337 /* Kernel treats sa_mask as an array of longs.
1338 * For 32-bit process, "long" is uint32_t, thus, for example,
1339 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1340 * But for (64-bit) kernel, 32th bit in sa_mask is
1341 * 32th bit in 0th (64-bit) long!
1342 * For little-endian, it's the same.
1343 * For big-endian, we swap 32-bit words.
1345 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1350 r = umove(tcp, addr, &sa);
1356 /* Architectures using function pointers, like
1357 * hppa, may need to manipulate the function pointer
1358 * to compute the result of a comparison. However,
1359 * the SA_HANDLER function pointer exists only in
1360 * the address space of the traced process, and can't
1361 * be manipulated by strace. In order to prevent the
1362 * compiler from generating code to manipulate
1363 * SA_HANDLER we cast the function pointers to long. */
1364 if ((long)sa.__sa_handler == (long)SIG_ERR)
1365 tprints("{SIG_ERR, ");
1366 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1367 tprints("{SIG_DFL, ");
1368 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1369 tprints("{SIG_IGN, ");
1371 tprintf("{%#lx, ", (long) sa.__sa_handler);
1372 /* Questionable code below.
1373 * Kernel won't handle sys_rt_sigaction
1374 * with wrong sigset size (just returns EINVAL)
1375 * therefore tcp->u_arg[3(4)] _must_ be NSIG / 8 here,
1376 * and we always use smaller memcpy. */
1377 sigemptyset(&sigset);
1379 if (tcp->u_arg[4] <= sizeof(sigset))
1380 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[4]);
1382 if (tcp->u_arg[3] <= sizeof(sigset))
1383 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[3]);
1386 memcpy(&sigset, &sa.sa_mask, sizeof(sigset));
1387 printsigmask(&sigset, 1);
1389 printflags(sigact_flags, sa.sa_flags, "SA_???");
1391 if (sa.sa_flags & SA_RESTORER)
1392 tprintf(", %p", sa.sa_restorer);
1401 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1402 #elif defined(ALPHA)
1403 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1405 tprintf(", %lu", tcp->u_arg[3]);
1411 sys_rt_sigpending(struct tcb *tcp)
1417 tprintf("%#lx", tcp->u_arg[0]);
1418 else if (copy_sigset_len(tcp, tcp->u_arg[0],
1419 &sigset, tcp->u_arg[1]) < 0)
1422 printsigmask(&sigset, 1);
1428 sys_rt_sigsuspend(struct tcb *tcp)
1430 if (entering(tcp)) {
1432 if (copy_sigset_len(tcp, tcp->u_arg[0], &sigm, tcp->u_arg[1]) < 0)
1435 printsigmask(&sigm, 1);
1441 sys_rt_sigqueueinfo(struct tcb *tcp)
1443 if (entering(tcp)) {
1445 tprintf("%lu, ", tcp->u_arg[0]);
1446 printsignal(tcp->u_arg[1]);
1448 if (umove(tcp, tcp->u_arg[2], &si) < 0)
1449 tprintf("%#lx", tcp->u_arg[2]);
1451 printsiginfo(&si, verbose(tcp));
1456 int sys_rt_sigtimedwait(struct tcb *tcp)
1458 if (entering(tcp)) {
1461 if (copy_sigset_len(tcp, tcp->u_arg[0],
1462 &sigset, tcp->u_arg[3]) < 0)
1465 printsigmask(&sigset, 1);
1467 /* This is the only "return" parameter, */
1468 if (tcp->u_arg[1] != 0)
1470 /* ... if it's NULL, can decode all on entry */
1473 else if (tcp->u_arg[1] != 0) {
1474 /* syscall exit, and u_arg[1] wasn't NULL */
1476 tprintf("%#lx, ", tcp->u_arg[1]);
1479 if (umove(tcp, tcp->u_arg[1], &si) < 0)
1480 tprintf("%#lx, ", tcp->u_arg[1]);
1482 printsiginfo(&si, verbose(tcp));
1488 /* syscall exit, and u_arg[1] was NULL */
1491 print_timespec(tcp, tcp->u_arg[2]);
1492 tprintf(", %d", (int) tcp->u_arg[3]);
1497 sys_restart_syscall(struct tcb *tcp)
1500 tprints("<... resuming interrupted call ...>");
1505 do_signalfd(struct tcb *tcp, int flags_arg)
1507 if (entering(tcp)) {
1508 printfd(tcp, tcp->u_arg[0]);
1510 print_sigset(tcp, tcp->u_arg[1], 1);
1511 tprintf(", %lu", tcp->u_arg[2]);
1512 if (flags_arg >= 0) {
1514 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1521 sys_signalfd(struct tcb *tcp)
1523 return do_signalfd(tcp, -1);
1527 sys_signalfd4(struct tcb *tcp)
1529 return do_signalfd(tcp, 3);