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>
63 #if defined(SPARC) || defined(SPARC64) || defined(MIPS)
65 struct pt_regs si_regs;
68 #elif defined HAVE_ASM_SIGCONTEXT_H
69 # if !defined(IA64) && !defined(X86_64) && !defined(X32)
70 # include <asm/sigcontext.h>
72 #else /* !HAVE_ASM_SIGCONTEXT_H */
73 # if defined I386 && !defined HAVE_STRUCT_SIGCONTEXT_STRUCT
74 struct sigcontext_struct {
75 unsigned short gs, __gsh;
76 unsigned short fs, __fsh;
77 unsigned short es, __esh;
78 unsigned short ds, __dsh;
90 unsigned short cs, __csh;
92 unsigned long esp_at_signal;
93 unsigned short ss, __ssh;
95 unsigned long oldmask;
99 # if defined M68K && !defined HAVE_STRUCT_SIGCONTEXT
102 unsigned long sc_mask;
103 unsigned long sc_usp;
108 unsigned short sc_sr;
110 unsigned short sc_formatvec;
114 #endif /* !HAVE_ASM_SIGCONTEXT_H */
117 # warning: NSIG is not defined, using 32
121 /* Ugh. Is this really correct? ARM has no RT signals?! */
126 #ifdef HAVE_SIGACTION
128 #if defined I386 || defined X86_64 || defined X32
129 /* The libc headers do not define this constant since it should only be
130 used by the implementation. So we define it here. */
132 # define SA_RESTORER 0x04000000
136 static const struct xlat sigact_flags[] = {
138 { SA_RESTORER, "SA_RESTORER" },
141 { SA_STACK, "SA_STACK" },
144 { SA_RESTART, "SA_RESTART" },
147 { SA_INTERRUPT, "SA_INTERRUPT" },
150 { SA_NODEFER, "SA_NODEFER" },
152 #if defined SA_NOMASK && SA_NODEFER != SA_NOMASK
153 { SA_NOMASK, "SA_NOMASK" },
156 { SA_RESETHAND, "SA_RESETHAND" },
158 #if defined SA_ONESHOT && SA_ONESHOT != SA_RESETHAND
159 { SA_ONESHOT, "SA_ONESHOT" },
162 { SA_SIGINFO, "SA_SIGINFO" },
165 { SA_RESETHAND, "SA_RESETHAND" },
168 { SA_ONSTACK, "SA_ONSTACK" },
171 { SA_NODEFER, "SA_NODEFER" },
174 { SA_NOCLDSTOP, "SA_NOCLDSTOP" },
177 { SA_NOCLDWAIT, "SA_NOCLDWAIT" },
180 { _SA_BSDCALL, "_SA_BSDCALL" },
183 { SA_NOPTRACE, "SA_NOPTRACE" },
188 static const struct xlat sigprocmaskcmds[] = {
189 { SIG_BLOCK, "SIG_BLOCK" },
190 { SIG_UNBLOCK, "SIG_UNBLOCK" },
191 { SIG_SETMASK, "SIG_SETMASK" },
193 { SIG_SETMASK32,"SIG_SETMASK32" },
198 #endif /* HAVE_SIGACTION */
200 /* Anonymous realtime signals. */
201 /* Under glibc 2.1, SIGRTMIN et al are functions, but __SIGRTMIN is a
202 constant. This is what we want. Otherwise, just use SIGRTMIN. */
205 #define __SIGRTMIN SIGRTMIN
206 #define __SIGRTMAX SIGRTMAX /* likewise */
210 /* Note on the size of sigset_t:
212 * In glibc, sigset_t is an array with space for 1024 bits (!),
213 * even though all arches supported by Linux have only 64 signals
214 * except MIPS, which has 128. IOW, it is 128 bytes long.
216 * In-kernel sigset_t is sized correctly (it is either 64 or 128 bit long).
217 * However, some old syscall return only 32 lower bits (one word).
218 * Example: sys_sigpending vs sys_rt_sigpending.
220 * Be aware of this fact when you try to
221 * memcpy(&tcp->u_arg[1], &something, sizeof(sigset_t))
222 * - sizeof(sigset_t) is much bigger than you think,
223 * it may overflow tcp->u_arg[] array, and it may try to copy more data
224 * than is really available in <something>.
226 * umoven(tcp, addr, sizeof(sigset_t), &sigset)
227 * may be a bad idea: it'll try to read much more data than needed
228 * to fetch a sigset_t.
229 * Use (NSIG / 8) as a size instead.
235 static char buf[sizeof("SIGRT_%d") + sizeof(int)*3];
237 if (sig >= 0 && sig < nsignals)
238 return signalent[sig];
240 if (sig >= __SIGRTMIN && sig <= __SIGRTMAX) {
241 sprintf(buf, "SIGRT_%d", (int)(sig - __SIGRTMIN));
245 sprintf(buf, "%d", sig);
250 long_to_sigset(long l, sigset_t *s)
257 copy_sigset_len(struct tcb *tcp, long addr, sigset_t *s, int len)
259 if (len > sizeof(*s))
262 if (umoven(tcp, addr, len, (char *)s) < 0)
267 /* Original sigset is unsigned long */
268 #define copy_sigset(tcp, addr, s) copy_sigset_len(tcp, addr, s, sizeof(long))
271 sprintsigmask(const char *str, sigset_t *mask, int rt)
272 /* set might include realtime sigs */
274 /* Was [8 * sizeof(sigset_t) * 8], but
275 * glibc sigset_t is huge (1024 bits = 128 *bytes*),
276 * and we were ending up with 8k (!) buffer here.
278 * No Unix system can have sig > 255
279 * (waitpid API won't be able to indicate death from one)
280 * and sig 0 doesn't exist either.
281 * Therefore max possible no of sigs is 255: 1..255
283 static char outstr[8 * (255 * 2 / 3)];
294 maxsigs = __SIGRTMAX; /* instead */
296 s = stpcpy(outstr, str);
298 for (i = 1; i < maxsigs; i++) {
299 if (sigismember(mask, i) == 1)
303 /* 1: show mask members, 0: show those which are NOT in mask */
304 show_members = (nsigs < nsignals * 2 / 3);
309 for (i = 1; i < maxsigs; i++) {
310 if (sigismember(mask, i) == show_members) {
311 /* real-time signals on solaris don't have
317 s = stpcpy(s, signalent[i] + 3);
320 else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
321 sprintf(tsig, "RT_%u", i - __SIGRTMIN);
324 #endif /* SIGRTMIN */
326 sprintf(tsig, "%u", i);
340 printsigmask(sigset_t *mask, int rt)
342 tprints(sprintsigmask("", mask, rt));
348 tprints(signame(nr));
352 print_sigset(struct tcb *tcp, long addr, int rt)
358 else if (copy_sigset(tcp, addr, &ss) < 0)
359 tprintf("%#lx", addr);
361 printsigmask(&ss, rt);
365 #define ILL_ILLOPC 1 /* illegal opcode */
366 #define ILL_ILLOPN 2 /* illegal operand */
367 #define ILL_ILLADR 3 /* illegal addressing mode */
368 #define ILL_ILLTRP 4 /* illegal trap */
369 #define ILL_PRVOPC 5 /* privileged opcode */
370 #define ILL_PRVREG 6 /* privileged register */
371 #define ILL_COPROC 7 /* coprocessor error */
372 #define ILL_BADSTK 8 /* internal stack error */
373 #define FPE_INTDIV 1 /* integer divide by zero */
374 #define FPE_INTOVF 2 /* integer overflow */
375 #define FPE_FLTDIV 3 /* floating point divide by zero */
376 #define FPE_FLTOVF 4 /* floating point overflow */
377 #define FPE_FLTUND 5 /* floating point underflow */
378 #define FPE_FLTRES 6 /* floating point inexact result */
379 #define FPE_FLTINV 7 /* floating point invalid operation */
380 #define FPE_FLTSUB 8 /* subscript out of range */
381 #define SEGV_MAPERR 1 /* address not mapped to object */
382 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */
383 #define BUS_ADRALN 1 /* invalid address alignment */
384 #define BUS_ADRERR 2 /* non-existant physical address */
385 #define BUS_OBJERR 3 /* object specific hardware error */
386 #define TRAP_BRKPT 1 /* process breakpoint */
387 #define TRAP_TRACE 2 /* process trace trap */
388 #define CLD_EXITED 1 /* child has exited */
389 #define CLD_KILLED 2 /* child was killed */
390 #define CLD_DUMPED 3 /* child terminated abnormally */
391 #define CLD_TRAPPED 4 /* traced child has trapped */
392 #define CLD_STOPPED 5 /* child has stopped */
393 #define CLD_CONTINUED 6 /* stopped child has continued */
394 #define POLL_IN 1 /* data input available */
395 #define POLL_OUT 2 /* output buffers available */
396 #define POLL_MSG 3 /* input message available */
397 #define POLL_ERR 4 /* i/o error */
398 #define POLL_PRI 5 /* high priority input available */
399 #define POLL_HUP 6 /* device disconnected */
400 #define SI_KERNEL 0x80 /* sent by kernel */
401 #define SI_USER 0 /* sent by kill, sigsend, raise */
402 #define SI_QUEUE -1 /* sent by sigqueue */
403 #define SI_TIMER -2 /* sent by timer expiration */
404 #define SI_MESGQ -3 /* sent by real time mesq state change */
405 #define SI_ASYNCIO -4 /* sent by AIO completion */
406 #define SI_SIGIO -5 /* sent by SIGIO */
407 #define SI_TKILL -6 /* sent by tkill */
408 #define SI_ASYNCNL -60 /* sent by asynch name lookup completion */
412 # define SI_FROMUSER(sip) ((sip)->si_code <= 0)
415 #if defined(__GLIBC__) && (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 1))
416 /* Type for data associated with a signal. */
423 # define __SI_MAX_SIZE 128
424 # define __SI_PAD_SIZE ((__SI_MAX_SIZE / sizeof(int)) - 3)
426 typedef struct siginfo
428 int si_signo; /* Signal number. */
429 int si_errno; /* If non-zero, an errno value associated with
430 this signal, as defined in <errno.h>. */
431 int si_code; /* Signal code. */
435 int _pad[__SI_PAD_SIZE];
440 __pid_t si_pid; /* Sending process ID. */
441 __uid_t si_uid; /* Real user ID of sending process. */
444 /* POSIX.1b timers. */
447 unsigned int _timer1;
448 unsigned int _timer2;
451 /* POSIX.1b signals. */
454 __pid_t si_pid; /* Sending process ID. */
455 __uid_t si_uid; /* Real user ID of sending process. */
456 sigval_t si_sigval; /* Signal value. */
462 __pid_t si_pid; /* Which child. */
463 int si_status; /* Exit value or signal. */
468 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS. */
471 void *si_addr; /* Faulting insn/memory ref. */
477 int si_band; /* Band event for SIGPOLL. */
483 #define si_pid _sifields._kill.si_pid
484 #define si_uid _sifields._kill.si_uid
485 #define si_status _sifields._sigchld.si_status
486 #define si_utime _sifields._sigchld.si_utime
487 #define si_stime _sifields._sigchld.si_stime
488 #define si_value _sifields._rt.si_sigval
489 #define si_int _sifields._rt.si_sigval.sival_int
490 #define si_ptr _sifields._rt.si_sigval.sival_ptr
491 #define si_addr _sifields._sigfault.si_addr
492 #define si_band _sifields._sigpoll.si_band
493 #define si_fd _sifields._sigpoll.si_fd
497 static const struct xlat siginfo_codes[] = {
499 { SI_KERNEL, "SI_KERNEL" },
502 { SI_USER, "SI_USER" },
505 { SI_QUEUE, "SI_QUEUE" },
508 { SI_TIMER, "SI_TIMER" },
511 { SI_MESGQ, "SI_MESGQ" },
514 { SI_ASYNCIO, "SI_ASYNCIO" },
517 { SI_SIGIO, "SI_SIGIO" },
520 { SI_TKILL, "SI_TKILL" },
523 { SI_ASYNCNL, "SI_ASYNCNL" },
526 { SI_NOINFO, "SI_NOINFO" },
529 { SI_LWP, "SI_LWP" },
534 static const struct xlat sigill_codes[] = {
535 { ILL_ILLOPC, "ILL_ILLOPC" },
536 { ILL_ILLOPN, "ILL_ILLOPN" },
537 { ILL_ILLADR, "ILL_ILLADR" },
538 { ILL_ILLTRP, "ILL_ILLTRP" },
539 { ILL_PRVOPC, "ILL_PRVOPC" },
540 { ILL_PRVREG, "ILL_PRVREG" },
541 { ILL_COPROC, "ILL_COPROC" },
542 { ILL_BADSTK, "ILL_BADSTK" },
546 static const struct xlat sigfpe_codes[] = {
547 { FPE_INTDIV, "FPE_INTDIV" },
548 { FPE_INTOVF, "FPE_INTOVF" },
549 { FPE_FLTDIV, "FPE_FLTDIV" },
550 { FPE_FLTOVF, "FPE_FLTOVF" },
551 { FPE_FLTUND, "FPE_FLTUND" },
552 { FPE_FLTRES, "FPE_FLTRES" },
553 { FPE_FLTINV, "FPE_FLTINV" },
554 { FPE_FLTSUB, "FPE_FLTSUB" },
558 static const struct xlat sigtrap_codes[] = {
559 { TRAP_BRKPT, "TRAP_BRKPT" },
560 { TRAP_TRACE, "TRAP_TRACE" },
564 static const struct xlat sigchld_codes[] = {
565 { CLD_EXITED, "CLD_EXITED" },
566 { CLD_KILLED, "CLD_KILLED" },
567 { CLD_DUMPED, "CLD_DUMPED" },
568 { CLD_TRAPPED, "CLD_TRAPPED" },
569 { CLD_STOPPED, "CLD_STOPPED" },
570 { CLD_CONTINUED,"CLD_CONTINUED" },
574 static const struct xlat sigpoll_codes[] = {
575 { POLL_IN, "POLL_IN" },
576 { POLL_OUT, "POLL_OUT" },
577 { POLL_MSG, "POLL_MSG" },
578 { POLL_ERR, "POLL_ERR" },
579 { POLL_PRI, "POLL_PRI" },
580 { POLL_HUP, "POLL_HUP" },
584 static const struct xlat sigprof_codes[] = {
586 { PROF_SIG, "PROF_SIG" },
592 static const struct xlat sigemt_codes[] = {
594 { EMT_TAGOVF, "EMT_TAGOVF" },
600 static const struct xlat sigsegv_codes[] = {
601 { SEGV_MAPERR, "SEGV_MAPERR" },
602 { SEGV_ACCERR, "SEGV_ACCERR" },
606 static const struct xlat sigbus_codes[] = {
607 { BUS_ADRALN, "BUS_ADRALN" },
608 { BUS_ADRERR, "BUS_ADRERR" },
609 { BUS_OBJERR, "BUS_OBJERR" },
614 printsiginfo(siginfo_t *sip, int verbose)
618 if (sip->si_signo == 0) {
622 tprints("{si_signo=");
623 printsignal(sip->si_signo);
624 code = xlookup(siginfo_codes, sip->si_code);
626 switch (sip->si_signo) {
628 code = xlookup(sigtrap_codes, sip->si_code);
631 code = xlookup(sigchld_codes, sip->si_code);
634 code = xlookup(sigpoll_codes, sip->si_code);
637 code = xlookup(sigprof_codes, sip->si_code);
640 code = xlookup(sigill_codes, sip->si_code);
644 code = xlookup(sigemt_codes, sip->si_code);
648 code = xlookup(sigfpe_codes, sip->si_code);
651 code = xlookup(sigsegv_codes, sip->si_code);
654 code = xlookup(sigbus_codes, sip->si_code);
659 tprintf(", si_code=%s", code);
661 tprintf(", si_code=%#x", sip->si_code);
663 if (sip->si_code != SI_NOINFO)
667 if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
668 tprintf(", si_errno=%d", sip->si_errno);
670 tprintf(", si_errno=%s",
671 errnoent[sip->si_errno]);
674 if (SI_FROMUSER(sip)) {
675 tprintf(", si_pid=%lu, si_uid=%lu",
676 (unsigned long) sip->si_pid,
677 (unsigned long) sip->si_uid);
678 switch (sip->si_code) {
689 tprintf(", si_value=%d", sip->si_int);
698 tprintf(", si_value={int=%u, ptr=%#lx}",
700 (unsigned long) sip->si_ptr);
705 #endif /* SI_FROMUSER */
707 switch (sip->si_signo) {
709 tprintf(", si_pid=%ld, si_status=",
711 if (sip->si_code == CLD_EXITED)
712 tprintf("%d", sip->si_status);
714 printsignal(sip->si_status);
718 tprintf(", si_utime=%llu, si_stime=%llu",
719 (unsigned long long) sip->si_utime,
720 (unsigned long long) sip->si_stime);
722 case SIGILL: case SIGFPE:
723 case SIGSEGV: case SIGBUS:
724 tprintf(", si_addr=%#lx",
725 (unsigned long) sip->si_addr);
728 switch (sip->si_code) {
729 case POLL_IN: case POLL_OUT: case POLL_MSG:
730 tprintf(", si_band=%ld",
731 (long) sip->si_band);
736 if (sip->si_pid || sip->si_uid)
737 tprintf(", si_pid=%lu, si_uid=%lu",
738 (unsigned long) sip->si_pid,
739 (unsigned long) sip->si_uid);
745 tprintf(", si_value={int=%u, ptr=%#lx}",
747 (unsigned long) sip->si_ptr);
757 sys_sigsetmask(struct tcb *tcp)
761 long_to_sigset(tcp->u_arg[0], &sigm);
762 printsigmask(&sigm, 0);
764 else if (!syserror(tcp)) {
766 long_to_sigset(tcp->u_rval, &sigm);
767 tcp->auxstr = sprintsigmask("old mask ", &sigm, 0);
769 return RVAL_HEX | RVAL_STR;
774 #ifdef HAVE_SIGACTION
776 struct old_sigaction {
777 __sighandler_t __sa_handler;
778 unsigned long sa_mask;
779 unsigned long sa_flags;
780 void (*sa_restorer)(void);
782 #define SA_HANDLER __sa_handler
785 #define SA_HANDLER sa_handler
789 sys_sigaction(struct tcb *tcp)
793 struct old_sigaction sa;
796 printsignal(tcp->u_arg[0]);
798 addr = tcp->u_arg[1];
800 addr = tcp->u_arg[2];
803 else if (!verbose(tcp))
804 tprintf("%#lx", addr);
805 else if (umove(tcp, addr, &sa) < 0)
808 /* Architectures using function pointers, like
809 * hppa, may need to manipulate the function pointer
810 * to compute the result of a comparison. However,
811 * the SA_HANDLER function pointer exists only in
812 * the address space of the traced process, and can't
813 * be manipulated by strace. In order to prevent the
814 * compiler from generating code to manipulate
815 * SA_HANDLER we cast the function pointers to long. */
816 if ((long)sa.SA_HANDLER == (long)SIG_ERR)
817 tprints("{SIG_ERR, ");
818 else if ((long)sa.SA_HANDLER == (long)SIG_DFL)
819 tprints("{SIG_DFL, ");
820 else if ((long)sa.SA_HANDLER == (long)SIG_IGN)
821 tprints("{SIG_IGN, ");
823 tprintf("{%#lx, ", (long) sa.SA_HANDLER);
824 long_to_sigset(sa.sa_mask, &sigset);
825 printsigmask(&sigset, 0);
827 printflags(sigact_flags, sa.sa_flags, "SA_???");
829 if (sa.sa_flags & SA_RESTORER)
830 tprintf(", %p", sa.sa_restorer);
837 tprintf(", %#lx", (unsigned long) sa.sa_restorer);
842 sys_signal(struct tcb *tcp)
845 printsignal(tcp->u_arg[0]);
847 switch (tcp->u_arg[1]) {
858 tprintf("%#lx", tcp->u_arg[1]);
862 else if (!syserror(tcp)) {
863 switch (tcp->u_rval) {
865 tcp->auxstr = "SIG_ERR"; break;
867 tcp->auxstr = "SIG_DFL"; break;
869 tcp->auxstr = "SIG_IGN"; break;
873 return RVAL_HEX | RVAL_STR;
878 #endif /* HAVE_SIGACTION */
881 sys_sigreturn(struct tcb *tcp)
885 struct sigcontext_struct sc;
887 if (umove(tcp, arm_regs.ARM_sp, &sc) < 0)
889 long_to_sigset(sc.oldmask, &sigm);
890 tprints(sprintsigmask(") (mask ", &sigm, 0));
892 #elif defined(S390) || defined(S390X)
895 struct sigcontext_struct sc;
896 if (upeek(tcp, PT_GPR15, &usp) < 0)
898 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
900 tprints(sprintsigmask(") (mask ", (sigset_t *)&sc.oldmask[0], 0));
904 struct sigcontext_struct sc;
905 /* Note: on i386, sc is followed on stack by struct fpstate
906 * and after it an additional u32 extramask[1] which holds
907 * upper half of the mask. We can fetch it there
908 * if/when we'd want to display the full mask...
911 if (umove(tcp, i386_regs.esp, &sc) < 0)
913 long_to_sigset(sc.oldmask, &sigm);
914 tprints(sprintsigmask(") (mask ", &sigm, 0));
918 struct sigcontext sc;
921 /* offset of sigcontext in the kernel's sigframe structure: */
922 # define SIGFRAME_SC_OFFSET 0x90
923 if (upeek(tcp, PT_R12, &sp) < 0)
925 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
928 memcpy(&sigm, &sc.sc_mask, NSIG / 8);
929 tprints(sprintsigmask(") (mask ", &sigm, 0));
931 #elif defined(POWERPC)
934 struct sigcontext_struct sc;
936 if (upeek(tcp, sizeof(unsigned long) * PT_R1, &esp) < 0)
938 /* Skip dummy stack frame. */
940 if (current_personality == 0)
947 if (umove(tcp, esp, &sc) < 0)
949 long_to_sigset(sc.oldmask, &sigm);
950 tprints(sprintsigmask(") (mask ", &sigm, 0));
955 struct sigcontext sc;
957 if (upeek(tcp, 4*PT_USP, &usp) < 0)
959 if (umove(tcp, usp, &sc) < 0)
961 long_to_sigset(sc.sc_mask, &sigm);
962 tprints(sprintsigmask(") (mask ", &sigm, 0));
967 struct sigcontext_struct sc;
969 if (upeek(tcp, REG_FP, &fp) < 0)
971 if (umove(tcp, fp, &sc) < 0)
973 long_to_sigset(sc.sc_mask, &sigm);
974 tprints(sprintsigmask(") (mask ", &sigm, 0));
976 #elif defined(SPARC) || defined(SPARC64)
981 i1 = regs.u_regs[U_REG_O1];
982 if (umove(tcp, i1, &si) < 0) {
983 perror_msg("%s", "sigreturn: umove");
986 long_to_sigset(si.si_mask, &sigm);
987 tprints(sprintsigmask(") (mask ", &sigm, 0));
989 #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
990 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
996 if (upeek(tcp, REG_SP, &sp) < 0)
998 /* There are six words followed by a 128-byte siginfo. */
999 sp = sp + 6 * 4 + 128;
1000 if (umove(tcp, sp, &uc) < 0)
1002 long_to_sigset(*(long *) &uc.uc_sigmask, &sigm);
1003 tprints(sprintsigmask(") (mask ", &sigm, 0));
1006 if (entering(tcp)) {
1008 struct pt_regs regs;
1011 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1012 perror_msg("%s", "sigreturn: PTRACE_GETREGS");
1016 if (umove(tcp, sp, &si) < 0)
1018 long_to_sigset(si.si_mask, &sigm);
1019 tprints(sprintsigmask(") (mask ", &sigm, 0));
1021 #elif defined(CRISV10) || defined(CRISV32)
1022 if (entering(tcp)) {
1023 struct sigcontext sc;
1024 long regs[PT_MAX+1];
1026 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
1027 perror_msg("%s", "sigreturn: PTRACE_GETREGS");
1030 if (umove(tcp, regs[PT_USP], &sc) < 0)
1032 long_to_sigset(sc.oldmask, &sigm);
1033 tprints(sprintsigmask(") (mask ", &sigm, 0));
1036 if (entering(tcp)) {
1040 /* offset of ucontext in the kernel's sigframe structure */
1041 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(struct siginfo)
1042 if (umove(tcp, tile_regs.sp + SIGFRAME_UC_OFFSET, &uc) < 0)
1045 memcpy(&sigm, &uc.uc_sigmask, NSIG / 8);
1046 tprints(sprintsigmask(") (mask ", &sigm, 0));
1048 #elif defined(MICROBLAZE)
1049 /* TODO: Verify that this is correct... */
1050 if (entering(tcp)) {
1051 struct sigcontext sc;
1054 /* Read r1, the stack pointer. */
1055 if (upeek(tcp, 1 * 4, &sp) < 0)
1057 if (umove(tcp, sp, &sc) < 0)
1059 long_to_sigset(sc.oldmask, &sigm);
1060 tprints(sprintsigmask(") (mask ", &sigm, 0));
1062 #elif defined(X86_64)
1063 /* no need to remind */
1065 # warning No sys_sigreturn() for this architecture
1066 # warning (no problem, just a reminder :-)
1072 sys_siggetmask(struct tcb *tcp)
1076 long_to_sigset(tcp->u_rval, &sigm);
1077 tcp->auxstr = sprintsigmask("mask ", &sigm, 0);
1079 return RVAL_HEX | RVAL_STR;
1083 sys_sigsuspend(struct tcb *tcp)
1085 if (entering(tcp)) {
1087 long_to_sigset(tcp->u_arg[2], &sigm);
1088 printsigmask(&sigm, 0);
1093 #if !defined SS_ONSTACK
1094 #define SS_ONSTACK 1
1095 #define SS_DISABLE 2
1096 #if defined(__GLIBC__) && (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 1))
1106 static const struct xlat sigaltstack_flags[] = {
1107 { SS_ONSTACK, "SS_ONSTACK" },
1108 { SS_DISABLE, "SS_DISABLE" },
1113 print_stack_t(struct tcb *tcp, unsigned long addr)
1116 if (umove(tcp, addr, &ss) < 0)
1118 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1119 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1120 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1125 sys_sigaltstack(struct tcb *tcp)
1127 if (entering(tcp)) {
1128 if (tcp->u_arg[0] == 0)
1130 else if (print_stack_t(tcp, tcp->u_arg[0]) < 0)
1135 if (tcp->u_arg[1] == 0)
1137 else if (print_stack_t(tcp, tcp->u_arg[1]) < 0)
1143 #ifdef HAVE_SIGACTION
1146 sys_sigprocmask(struct tcb *tcp)
1150 if (entering(tcp)) {
1152 * Alpha/OSF is different: it doesn't pass in two pointers,
1153 * but rather passes in the new bitmask as an argument and
1154 * then returns the old bitmask. This "works" because we
1155 * only have 64 signals to worry about. If you want more,
1156 * use of the rt_sigprocmask syscall is required.
1158 * old = osf_sigprocmask(how, new);
1160 * ret = sigprocmask(how, &new, &old, ...);
1162 memcpy(&ss, &tcp->u_arg[1], sizeof(long));
1163 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1165 printsigmask(&ss, 0);
1167 else if (!syserror(tcp)) {
1168 memcpy(&ss, &tcp->u_rval, sizeof(long));
1169 tcp->auxstr = sprintsigmask("old mask ", &ss, 0);
1170 return RVAL_HEX | RVAL_STR;
1173 if (entering(tcp)) {
1174 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1176 print_sigset(tcp, tcp->u_arg[1], 0);
1182 else if (syserror(tcp))
1183 tprintf("%#lx", tcp->u_arg[2]);
1185 print_sigset(tcp, tcp->u_arg[2], 0);
1191 #endif /* HAVE_SIGACTION */
1194 sys_kill(struct tcb *tcp)
1196 if (entering(tcp)) {
1197 long pid = tcp->u_arg[0];
1198 #if SUPPORTED_PERSONALITIES > 1
1199 /* Sign-extend a 32-bit value when that's what it is. */
1200 if (current_wordsize < sizeof pid)
1201 pid = (long) (int) pid;
1203 tprintf("%ld, %s", pid, signame(tcp->u_arg[1]));
1209 sys_tgkill(struct tcb *tcp)
1211 if (entering(tcp)) {
1212 tprintf("%ld, %ld, %s",
1213 tcp->u_arg[0], tcp->u_arg[1], signame(tcp->u_arg[2]));
1219 sys_sigpending(struct tcb *tcp)
1225 tprintf("%#lx", tcp->u_arg[0]);
1226 else if (copy_sigset(tcp, tcp->u_arg[0], &sigset) < 0)
1229 printsigmask(&sigset, 0);
1235 sys_rt_sigprocmask(struct tcb *tcp)
1239 /* Note: arg[3] is the length of the sigset. */
1240 if (entering(tcp)) {
1241 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1245 else if (copy_sigset_len(tcp, tcp->u_arg[1], &sigset, tcp->u_arg[3]) < 0)
1246 tprintf("%#lx, ", tcp->u_arg[1]);
1248 printsigmask(&sigset, 1);
1255 else if (syserror(tcp))
1256 tprintf("%#lx", tcp->u_arg[2]);
1257 else if (copy_sigset_len(tcp, tcp->u_arg[2], &sigset, tcp->u_arg[3]) < 0)
1260 printsigmask(&sigset, 1);
1261 tprintf(", %lu", tcp->u_arg[3]);
1266 /* Structure describing the action to be taken when a signal arrives. */
1267 struct new_sigaction
1269 __sighandler_t __sa_handler;
1270 unsigned long sa_flags;
1271 void (*sa_restorer) (void);
1272 /* Kernel treats sa_mask as an array of longs. */
1273 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1275 /* Same for i386-on-x86_64 and similar cases */
1276 struct new_sigaction32
1278 uint32_t __sa_handler;
1280 uint32_t sa_restorer;
1281 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1285 sys_rt_sigaction(struct tcb *tcp)
1287 struct new_sigaction sa;
1292 if (entering(tcp)) {
1293 printsignal(tcp->u_arg[0]);
1295 addr = tcp->u_arg[1];
1297 addr = tcp->u_arg[2];
1303 if (!verbose(tcp)) {
1304 tprintf("%#lx", addr);
1307 #if SUPPORTED_PERSONALITIES > 1
1309 if (current_wordsize != sizeof(sa.sa_flags) && current_wordsize == 4) {
1310 struct new_sigaction32 sa32;
1311 r = umove(tcp, addr, &sa32);
1313 memset(&sa, 0, sizeof(sa));
1314 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1315 sa.sa_flags = sa32.sa_flags;
1316 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1317 /* Kernel treats sa_mask as an array of longs.
1318 * For 32-bit process, "long" is uint32_t, thus, for example,
1319 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1320 * But for (64-bit) kernel, 32th bit in sa_mask is
1321 * 32th bit in 0th (64-bit) long!
1322 * For little-endian, it's the same.
1323 * For big-endian, we swap 32-bit words.
1325 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1331 r = umove(tcp, addr, &sa);
1337 /* Architectures using function pointers, like
1338 * hppa, may need to manipulate the function pointer
1339 * to compute the result of a comparison. However,
1340 * the SA_HANDLER function pointer exists only in
1341 * the address space of the traced process, and can't
1342 * be manipulated by strace. In order to prevent the
1343 * compiler from generating code to manipulate
1344 * SA_HANDLER we cast the function pointers to long. */
1345 if ((long)sa.__sa_handler == (long)SIG_ERR)
1346 tprints("{SIG_ERR, ");
1347 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1348 tprints("{SIG_DFL, ");
1349 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1350 tprints("{SIG_IGN, ");
1352 tprintf("{%#lx, ", (long) sa.__sa_handler);
1353 /* Questionable code below.
1354 * Kernel won't handle sys_rt_sigaction
1355 * with wrong sigset size (just returns EINVAL)
1356 * therefore tcp->u_arg[3(4)] _must_ be NSIG / 8 here,
1357 * and we always use smaller memcpy. */
1358 sigemptyset(&sigset);
1360 if (tcp->u_arg[4] <= sizeof(sigset))
1361 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[4]);
1363 if (tcp->u_arg[3] <= sizeof(sigset))
1364 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[3]);
1367 memcpy(&sigset, &sa.sa_mask, sizeof(sigset));
1368 printsigmask(&sigset, 1);
1370 printflags(sigact_flags, sa.sa_flags, "SA_???");
1372 if (sa.sa_flags & SA_RESTORER)
1373 tprintf(", %p", sa.sa_restorer);
1382 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1383 #elif defined(ALPHA)
1384 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1386 tprintf(", %lu", tcp->u_arg[3]);
1392 sys_rt_sigpending(struct tcb *tcp)
1398 tprintf("%#lx", tcp->u_arg[0]);
1399 else if (copy_sigset_len(tcp, tcp->u_arg[0],
1400 &sigset, tcp->u_arg[1]) < 0)
1403 printsigmask(&sigset, 1);
1409 sys_rt_sigsuspend(struct tcb *tcp)
1411 if (entering(tcp)) {
1413 if (copy_sigset_len(tcp, tcp->u_arg[0], &sigm, tcp->u_arg[1]) < 0)
1416 printsigmask(&sigm, 1);
1422 print_sigqueueinfo(struct tcb *tcp, int sig, unsigned long uinfo)
1428 if (umove(tcp, uinfo, &si) < 0)
1429 tprintf("%#lx", uinfo);
1431 printsiginfo(&si, verbose(tcp));
1435 sys_rt_sigqueueinfo(struct tcb *tcp)
1437 if (entering(tcp)) {
1438 tprintf("%lu, ", tcp->u_arg[0]);
1439 print_sigqueueinfo(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1445 sys_rt_tgsigqueueinfo(struct tcb *tcp)
1447 if (entering(tcp)) {
1448 tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
1449 print_sigqueueinfo(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1454 int sys_rt_sigtimedwait(struct tcb *tcp)
1456 if (entering(tcp)) {
1459 if (copy_sigset_len(tcp, tcp->u_arg[0],
1460 &sigset, tcp->u_arg[3]) < 0)
1463 printsigmask(&sigset, 1);
1465 /* This is the only "return" parameter, */
1466 if (tcp->u_arg[1] != 0)
1468 /* ... if it's NULL, can decode all on entry */
1471 else if (tcp->u_arg[1] != 0) {
1472 /* syscall exit, and u_arg[1] wasn't NULL */
1474 tprintf("%#lx, ", tcp->u_arg[1]);
1477 if (umove(tcp, tcp->u_arg[1], &si) < 0)
1478 tprintf("%#lx, ", tcp->u_arg[1]);
1480 printsiginfo(&si, verbose(tcp));
1486 /* syscall exit, and u_arg[1] was NULL */
1489 print_timespec(tcp, tcp->u_arg[2]);
1490 tprintf(", %d", (int) tcp->u_arg[3]);
1495 sys_restart_syscall(struct tcb *tcp)
1498 tprints("<... resuming interrupted call ...>");
1503 do_signalfd(struct tcb *tcp, int flags_arg)
1505 if (entering(tcp)) {
1506 printfd(tcp, tcp->u_arg[0]);
1508 print_sigset(tcp, tcp->u_arg[1], 1);
1509 tprintf(", %lu", tcp->u_arg[2]);
1510 if (flags_arg >= 0) {
1512 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1519 sys_signalfd(struct tcb *tcp)
1521 return do_signalfd(tcp, -1);
1525 sys_signalfd4(struct tcb *tcp)
1527 return do_signalfd(tcp, 3);