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.
46 # ifndef PTRACE_PEEKUSR
47 # define PTRACE_PEEKUSR PTRACE_PEEKUSER
49 # ifndef PTRACE_POKEUSR
50 # define PTRACE_POKEUSR PTRACE_POKEUSER
52 #elif defined(HAVE_LINUX_PTRACE_H)
53 # undef PTRACE_SYSCALL
54 # ifdef HAVE_STRUCT_IA64_FPREG
55 # define ia64_fpreg XXX_ia64_fpreg
57 # ifdef HAVE_STRUCT_PT_ALL_USER_REGS
58 # define pt_all_user_regs XXX_pt_all_user_regs
60 # include <linux/ptrace.h>
62 # undef pt_all_user_regs
68 # include <asm/ptrace_offsets.h>
72 # undef PTRACE_GETREGS
73 # define PTRACE_GETREGS PTRACE_GETREGS64
74 # undef PTRACE_SETREGS
75 # define PTRACE_SETREGS PTRACE_SETREGS64
78 #if defined(SPARC) || defined(SPARC64) || defined(MIPS)
80 struct pt_regs si_regs;
83 #elif defined HAVE_ASM_SIGCONTEXT_H
84 # if !defined(IA64) && !defined(X86_64)
85 # include <asm/sigcontext.h>
86 # endif /* !IA64 && !X86_64 */
87 #else /* !HAVE_ASM_SIGCONTEXT_H */
88 # if defined I386 && !defined HAVE_STRUCT_SIGCONTEXT_STRUCT
89 struct sigcontext_struct {
90 unsigned short gs, __gsh;
91 unsigned short fs, __fsh;
92 unsigned short es, __esh;
93 unsigned short ds, __dsh;
102 unsigned long trapno;
105 unsigned short cs, __csh;
106 unsigned long eflags;
107 unsigned long esp_at_signal;
108 unsigned short ss, __ssh;
110 unsigned long oldmask;
114 # if defined M68K && !defined HAVE_STRUCT_SIGCONTEXT
117 unsigned long sc_mask;
118 unsigned long sc_usp;
123 unsigned short sc_sr;
125 unsigned short sc_formatvec;
129 #endif /* !HAVE_ASM_SIGCONTEXT_H */
132 # warning: NSIG is not defined, using 32
136 /* Ugh. Is this really correct? ARM has no RT signals?! */
143 #ifdef HAVE_SIGACTION
145 #if defined I386 || defined X86_64
146 /* The libc headers do not define this constant since it should only be
147 used by the implementation. So we define it here. */
149 # define SA_RESTORER 0x04000000
153 static const struct xlat sigact_flags[] = {
155 { SA_RESTORER, "SA_RESTORER" },
158 { SA_STACK, "SA_STACK" },
161 { SA_RESTART, "SA_RESTART" },
164 { SA_INTERRUPT, "SA_INTERRUPT" },
167 { SA_NODEFER, "SA_NODEFER" },
169 #if defined SA_NOMASK && SA_NODEFER != SA_NOMASK
170 { SA_NOMASK, "SA_NOMASK" },
173 { SA_RESETHAND, "SA_RESETHAND" },
175 #if defined SA_ONESHOT && SA_ONESHOT != SA_RESETHAND
176 { SA_ONESHOT, "SA_ONESHOT" },
179 { SA_SIGINFO, "SA_SIGINFO" },
182 { SA_RESETHAND, "SA_RESETHAND" },
185 { SA_ONSTACK, "SA_ONSTACK" },
188 { SA_NODEFER, "SA_NODEFER" },
191 { SA_NOCLDSTOP, "SA_NOCLDSTOP" },
194 { SA_NOCLDWAIT, "SA_NOCLDWAIT" },
197 { _SA_BSDCALL, "_SA_BSDCALL" },
200 { SA_NOPTRACE, "SA_NOPTRACE" },
205 static const struct xlat sigprocmaskcmds[] = {
206 { SIG_BLOCK, "SIG_BLOCK" },
207 { SIG_UNBLOCK, "SIG_UNBLOCK" },
208 { SIG_SETMASK, "SIG_SETMASK" },
210 { SIG_SETMASK32,"SIG_SETMASK32" },
215 #endif /* HAVE_SIGACTION */
217 /* Anonymous realtime signals. */
218 /* Under glibc 2.1, SIGRTMIN et al are functions, but __SIGRTMIN is a
219 constant. This is what we want. Otherwise, just use SIGRTMIN. */
222 #define __SIGRTMIN SIGRTMIN
223 #define __SIGRTMAX SIGRTMAX /* likewise */
227 /* Note on the size of sigset_t:
229 * In glibc, sigset_t is an array with space for 1024 bits (!),
230 * even though all arches supported by Linux have only 64 signals
231 * except MIPS, which has 128. IOW, it is 128 bytes long.
233 * In-kernel sigset_t is sized correctly (it is either 64 or 128 bit long).
234 * However, some old syscall return only 32 lower bits (one word).
235 * Example: sys_sigpending vs sys_rt_sigpending.
237 * Be aware of this fact when you try to
238 * memcpy(&tcp->u_arg[1], &something, sizeof(sigset_t))
239 * - sizeof(sigset_t) is much bigger than you think,
240 * it may overflow tcp->u_arg[] array, and it may try to copy more data
241 * than is really available in <something>.
243 * umoven(tcp, addr, sizeof(sigset_t), &sigset)
244 * may be a bad idea: it'll try to read much more data than needed
245 * to fetch a sigset_t.
246 * Use (NSIG / 8) as a size instead.
252 static char buf[sizeof("SIGRT_%d") + sizeof(int)*3];
254 if (sig >= 0 && sig < nsignals)
255 return signalent[sig];
257 if (sig >= __SIGRTMIN && sig <= __SIGRTMAX) {
258 sprintf(buf, "SIGRT_%d", (int)(sig - __SIGRTMIN));
262 sprintf(buf, "%d", sig);
267 long_to_sigset(long l, sigset_t *s)
274 copy_sigset_len(struct tcb *tcp, long addr, sigset_t *s, int len)
276 if (len > sizeof(*s))
279 if (umoven(tcp, addr, len, (char *)s) < 0)
284 /* Original sigset is unsigned long */
285 #define copy_sigset(tcp, addr, s) copy_sigset_len(tcp, addr, s, sizeof(long))
288 sprintsigmask(const char *str, sigset_t *mask, int rt)
289 /* set might include realtime sigs */
291 /* Was [8 * sizeof(sigset_t) * 8], but
292 * glibc sigset_t is huge (1024 bits = 128 *bytes*),
293 * and we were ending up with 8k (!) buffer here.
295 * No Unix system can have sig > 255
296 * (waitpid API won't be able to indicate death from one)
297 * and sig 0 doesn't exist either.
298 * Therefore max possible no of sigs is 255: 1..255
300 static char outstr[8 * (255 * 2 / 3)];
311 maxsigs = __SIGRTMAX; /* instead */
313 s = stpcpy(outstr, str);
315 for (i = 1; i < maxsigs; i++) {
316 if (sigismember(mask, i) == 1)
320 /* 1: show mask members, 0: show those which are NOT in mask */
321 show_members = (nsigs < nsignals * 2 / 3);
326 for (i = 1; i < maxsigs; i++) {
327 if (sigismember(mask, i) == show_members) {
328 /* real-time signals on solaris don't have
334 s = stpcpy(s, signalent[i] + 3);
337 else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
338 sprintf(tsig, "RT_%u", i - __SIGRTMIN);
341 #endif /* SIGRTMIN */
343 sprintf(tsig, "%u", i);
357 printsigmask(sigset_t *mask, int rt)
359 tprints(sprintsigmask("", mask, rt));
365 tprints(signame(nr));
369 print_sigset(struct tcb *tcp, long addr, int rt)
375 else if (copy_sigset(tcp, addr, &ss) < 0)
376 tprintf("%#lx", addr);
378 printsigmask(&ss, rt);
383 #define ILL_ILLOPC 1 /* illegal opcode */
384 #define ILL_ILLOPN 2 /* illegal operand */
385 #define ILL_ILLADR 3 /* illegal addressing mode */
386 #define ILL_ILLTRP 4 /* illegal trap */
387 #define ILL_PRVOPC 5 /* privileged opcode */
388 #define ILL_PRVREG 6 /* privileged register */
389 #define ILL_COPROC 7 /* coprocessor error */
390 #define ILL_BADSTK 8 /* internal stack error */
391 #define FPE_INTDIV 1 /* integer divide by zero */
392 #define FPE_INTOVF 2 /* integer overflow */
393 #define FPE_FLTDIV 3 /* floating point divide by zero */
394 #define FPE_FLTOVF 4 /* floating point overflow */
395 #define FPE_FLTUND 5 /* floating point underflow */
396 #define FPE_FLTRES 6 /* floating point inexact result */
397 #define FPE_FLTINV 7 /* floating point invalid operation */
398 #define FPE_FLTSUB 8 /* subscript out of range */
399 #define SEGV_MAPERR 1 /* address not mapped to object */
400 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */
401 #define BUS_ADRALN 1 /* invalid address alignment */
402 #define BUS_ADRERR 2 /* non-existant physical address */
403 #define BUS_OBJERR 3 /* object specific hardware error */
404 #define TRAP_BRKPT 1 /* process breakpoint */
405 #define TRAP_TRACE 2 /* process trace trap */
406 #define CLD_EXITED 1 /* child has exited */
407 #define CLD_KILLED 2 /* child was killed */
408 #define CLD_DUMPED 3 /* child terminated abnormally */
409 #define CLD_TRAPPED 4 /* traced child has trapped */
410 #define CLD_STOPPED 5 /* child has stopped */
411 #define CLD_CONTINUED 6 /* stopped child has continued */
412 #define POLL_IN 1 /* data input available */
413 #define POLL_OUT 2 /* output buffers available */
414 #define POLL_MSG 3 /* input message available */
415 #define POLL_ERR 4 /* i/o error */
416 #define POLL_PRI 5 /* high priority input available */
417 #define POLL_HUP 6 /* device disconnected */
418 #define SI_KERNEL 0x80 /* sent by kernel */
419 #define SI_USER 0 /* sent by kill, sigsend, raise */
420 #define SI_QUEUE -1 /* sent by sigqueue */
421 #define SI_TIMER -2 /* sent by timer expiration */
422 #define SI_MESGQ -3 /* sent by real time mesq state change */
423 #define SI_ASYNCIO -4 /* sent by AIO completion */
424 #define SI_SIGIO -5 /* sent by SIGIO */
425 #define SI_TKILL -6 /* sent by tkill */
426 #define SI_ASYNCNL -60 /* sent by asynch name lookup completion */
428 #define SI_FROMUSER(sip) ((sip)->si_code <= 0)
432 #if __GLIBC_MINOR__ < 1
433 /* Type for data associated with a signal. */
440 # define __SI_MAX_SIZE 128
441 # define __SI_PAD_SIZE ((__SI_MAX_SIZE / sizeof(int)) - 3)
443 typedef struct siginfo
445 int si_signo; /* Signal number. */
446 int si_errno; /* If non-zero, an errno value associated with
447 this signal, as defined in <errno.h>. */
448 int si_code; /* Signal code. */
452 int _pad[__SI_PAD_SIZE];
457 __pid_t si_pid; /* Sending process ID. */
458 __uid_t si_uid; /* Real user ID of sending process. */
461 /* POSIX.1b timers. */
464 unsigned int _timer1;
465 unsigned int _timer2;
468 /* POSIX.1b signals. */
471 __pid_t si_pid; /* Sending process ID. */
472 __uid_t si_uid; /* Real user ID of sending process. */
473 sigval_t si_sigval; /* Signal value. */
479 __pid_t si_pid; /* Which child. */
480 int si_status; /* Exit value or signal. */
485 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS. */
488 void *si_addr; /* Faulting insn/memory ref. */
494 int si_band; /* Band event for SIGPOLL. */
500 #define si_pid _sifields._kill.si_pid
501 #define si_uid _sifields._kill.si_uid
502 #define si_status _sifields._sigchld.si_status
503 #define si_utime _sifields._sigchld.si_utime
504 #define si_stime _sifields._sigchld.si_stime
505 #define si_value _sifields._rt.si_sigval
506 #define si_int _sifields._rt.si_sigval.sival_int
507 #define si_ptr _sifields._rt.si_sigval.sival_ptr
508 #define si_addr _sifields._sigfault.si_addr
509 #define si_band _sifields._sigpoll.si_band
510 #define si_fd _sifields._sigpoll.si_fd
516 static const struct xlat siginfo_codes[] = {
518 { SI_KERNEL, "SI_KERNEL" },
521 { SI_USER, "SI_USER" },
524 { SI_QUEUE, "SI_QUEUE" },
527 { SI_TIMER, "SI_TIMER" },
530 { SI_MESGQ, "SI_MESGQ" },
533 { SI_ASYNCIO, "SI_ASYNCIO" },
536 { SI_SIGIO, "SI_SIGIO" },
539 { SI_TKILL, "SI_TKILL" },
542 { SI_ASYNCNL, "SI_ASYNCNL" },
545 { SI_NOINFO, "SI_NOINFO" },
548 { SI_LWP, "SI_LWP" },
553 static const struct xlat sigill_codes[] = {
554 { ILL_ILLOPC, "ILL_ILLOPC" },
555 { ILL_ILLOPN, "ILL_ILLOPN" },
556 { ILL_ILLADR, "ILL_ILLADR" },
557 { ILL_ILLTRP, "ILL_ILLTRP" },
558 { ILL_PRVOPC, "ILL_PRVOPC" },
559 { ILL_PRVREG, "ILL_PRVREG" },
560 { ILL_COPROC, "ILL_COPROC" },
561 { ILL_BADSTK, "ILL_BADSTK" },
565 static const struct xlat sigfpe_codes[] = {
566 { FPE_INTDIV, "FPE_INTDIV" },
567 { FPE_INTOVF, "FPE_INTOVF" },
568 { FPE_FLTDIV, "FPE_FLTDIV" },
569 { FPE_FLTOVF, "FPE_FLTOVF" },
570 { FPE_FLTUND, "FPE_FLTUND" },
571 { FPE_FLTRES, "FPE_FLTRES" },
572 { FPE_FLTINV, "FPE_FLTINV" },
573 { FPE_FLTSUB, "FPE_FLTSUB" },
577 static const struct xlat sigtrap_codes[] = {
578 { TRAP_BRKPT, "TRAP_BRKPT" },
579 { TRAP_TRACE, "TRAP_TRACE" },
583 static const struct xlat sigchld_codes[] = {
584 { CLD_EXITED, "CLD_EXITED" },
585 { CLD_KILLED, "CLD_KILLED" },
586 { CLD_DUMPED, "CLD_DUMPED" },
587 { CLD_TRAPPED, "CLD_TRAPPED" },
588 { CLD_STOPPED, "CLD_STOPPED" },
589 { CLD_CONTINUED,"CLD_CONTINUED" },
593 static const struct xlat sigpoll_codes[] = {
594 { POLL_IN, "POLL_IN" },
595 { POLL_OUT, "POLL_OUT" },
596 { POLL_MSG, "POLL_MSG" },
597 { POLL_ERR, "POLL_ERR" },
598 { POLL_PRI, "POLL_PRI" },
599 { POLL_HUP, "POLL_HUP" },
603 static const struct xlat sigprof_codes[] = {
605 { PROF_SIG, "PROF_SIG" },
611 static const struct xlat sigemt_codes[] = {
613 { EMT_TAGOVF, "EMT_TAGOVF" },
619 static const struct xlat sigsegv_codes[] = {
620 { SEGV_MAPERR, "SEGV_MAPERR" },
621 { SEGV_ACCERR, "SEGV_ACCERR" },
625 static const struct xlat sigbus_codes[] = {
626 { BUS_ADRALN, "BUS_ADRALN" },
627 { BUS_ADRERR, "BUS_ADRERR" },
628 { BUS_OBJERR, "BUS_OBJERR" },
633 printsiginfo(siginfo_t *sip, int verbose)
637 if (sip->si_signo == 0) {
641 tprints("{si_signo=");
642 printsignal(sip->si_signo);
643 code = xlookup(siginfo_codes, sip->si_code);
645 switch (sip->si_signo) {
647 code = xlookup(sigtrap_codes, sip->si_code);
650 code = xlookup(sigchld_codes, sip->si_code);
653 code = xlookup(sigpoll_codes, sip->si_code);
656 code = xlookup(sigprof_codes, sip->si_code);
659 code = xlookup(sigill_codes, sip->si_code);
663 code = xlookup(sigemt_codes, sip->si_code);
667 code = xlookup(sigfpe_codes, sip->si_code);
670 code = xlookup(sigsegv_codes, sip->si_code);
673 code = xlookup(sigbus_codes, sip->si_code);
678 tprintf(", si_code=%s", code);
680 tprintf(", si_code=%#x", sip->si_code);
682 if (sip->si_code != SI_NOINFO)
686 if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
687 tprintf(", si_errno=%d", sip->si_errno);
689 tprintf(", si_errno=%s",
690 errnoent[sip->si_errno]);
693 if (SI_FROMUSER(sip)) {
694 tprintf(", si_pid=%lu, si_uid=%lu",
695 (unsigned long) sip->si_pid,
696 (unsigned long) sip->si_uid);
697 switch (sip->si_code) {
708 tprintf(", si_value=%d", sip->si_int);
717 tprintf(", si_value={int=%u, ptr=%#lx}",
719 (unsigned long) sip->si_ptr);
724 #endif /* SI_FROMUSER */
726 switch (sip->si_signo) {
728 tprintf(", si_pid=%ld, si_status=",
730 if (sip->si_code == CLD_EXITED)
731 tprintf("%d", sip->si_status);
733 printsignal(sip->si_status);
737 tprintf(", si_utime=%lu, si_stime=%lu",
741 case SIGILL: case SIGFPE:
742 case SIGSEGV: case SIGBUS:
743 tprintf(", si_addr=%#lx",
744 (unsigned long) sip->si_addr);
747 switch (sip->si_code) {
748 case POLL_IN: case POLL_OUT: case POLL_MSG:
749 tprintf(", si_band=%ld",
750 (long) sip->si_band);
755 if (sip->si_pid || sip->si_uid)
756 tprintf(", si_pid=%lu, si_uid=%lu",
757 (unsigned long) sip->si_pid,
758 (unsigned long) sip->si_uid);
764 tprintf(", si_value={int=%u, ptr=%#lx}",
766 (unsigned long) sip->si_ptr);
779 sys_sigsetmask(struct tcb *tcp)
783 long_to_sigset(tcp->u_arg[0], &sigm);
784 printsigmask(&sigm, 0);
786 else if (!syserror(tcp)) {
788 long_to_sigset(tcp->u_rval, &sigm);
789 tcp->auxstr = sprintsigmask("old mask ", &sigm, 0);
791 return RVAL_HEX | RVAL_STR;
798 #ifdef HAVE_SIGACTION
800 struct old_sigaction {
801 __sighandler_t __sa_handler;
802 unsigned long sa_mask;
803 unsigned long sa_flags;
804 void (*sa_restorer)(void);
806 #define SA_HANDLER __sa_handler
809 #define SA_HANDLER sa_handler
813 sys_sigaction(struct tcb *tcp)
817 struct old_sigaction sa;
821 printsignal(tcp->u_arg[0]);
823 addr = tcp->u_arg[1];
825 addr = tcp->u_arg[2];
828 else if (!verbose(tcp))
829 tprintf("%#lx", addr);
830 else if (umove(tcp, addr, &sa) < 0)
833 /* Architectures using function pointers, like
834 * hppa, may need to manipulate the function pointer
835 * to compute the result of a comparison. However,
836 * the SA_HANDLER function pointer exists only in
837 * the address space of the traced process, and can't
838 * be manipulated by strace. In order to prevent the
839 * compiler from generating code to manipulate
840 * SA_HANDLER we cast the function pointers to long. */
841 if ((long)sa.SA_HANDLER == (long)SIG_ERR)
842 tprints("{SIG_ERR, ");
843 else if ((long)sa.SA_HANDLER == (long)SIG_DFL)
844 tprints("{SIG_DFL, ");
845 else if ((long)sa.SA_HANDLER == (long)SIG_IGN)
846 tprints("{SIG_IGN, ");
848 tprintf("{%#lx, ", (long) sa.SA_HANDLER);
849 long_to_sigset(sa.sa_mask, &sigset);
850 printsigmask(&sigset, 0);
852 printflags(sigact_flags, sa.sa_flags, "SA_???");
854 if (sa.sa_flags & SA_RESTORER)
855 tprintf(", %p", sa.sa_restorer);
862 tprintf(", %#lx", (unsigned long) sa.sa_restorer);
867 sys_signal(struct tcb *tcp)
870 printsignal(tcp->u_arg[0]);
872 switch (tcp->u_arg[1]) {
883 tprintf("%#lx", tcp->u_arg[1]);
887 else if (!syserror(tcp)) {
888 switch (tcp->u_rval) {
890 tcp->auxstr = "SIG_ERR"; break;
892 tcp->auxstr = "SIG_DFL"; break;
894 tcp->auxstr = "SIG_IGN"; break;
898 return RVAL_HEX | RVAL_STR;
904 #endif /* HAVE_SIGACTION */
908 sys_sigreturn(struct tcb *tcp)
913 struct sigcontext_struct sc;
915 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (void *)®s) == -1)
917 if (umove(tcp, regs.ARM_sp, &sc) < 0)
919 long_to_sigset(sc.oldmask, &sigm);
920 tprints(sprintsigmask(") (mask ", &sigm, 0));
923 #elif defined(S390) || defined(S390X)
926 struct sigcontext_struct sc;
927 if (upeek(tcp, PT_GPR15, &usp) < 0)
929 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
931 tprints(sprintsigmask(") (mask ", (sigset_t *)&sc.oldmask[0], 0));
936 struct sigcontext_struct sc;
937 /* Note: on i386, sc is followed on stack by struct fpstate
938 * and after it an additional u32 extramask[1] which holds
939 * upper half of the mask. We can fetch it there
940 * if/when we'd want to display the full mask...
943 if (umove(tcp, i386_regs.esp, &sc) < 0)
945 long_to_sigset(sc.oldmask, &sigm);
946 tprints(sprintsigmask(") (mask ", &sigm, 0));
951 struct sigcontext sc;
954 /* offset of sigcontext in the kernel's sigframe structure: */
955 # define SIGFRAME_SC_OFFSET 0x90
956 if (upeek(tcp, PT_R12, &sp) < 0)
958 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
961 memcpy(&sigm, &sc.sc_mask, NSIG / 8);
962 tprints(sprintsigmask(") (mask ", &sigm, 0));
965 #elif defined(POWERPC)
968 struct sigcontext_struct sc;
970 if (upeek(tcp, sizeof(unsigned long) * PT_R1, &esp) < 0)
972 /* Skip dummy stack frame. */
974 if (current_personality == 0)
981 if (umove(tcp, esp, &sc) < 0)
983 long_to_sigset(sc.oldmask, &sigm);
984 tprints(sprintsigmask(") (mask ", &sigm, 0));
990 struct sigcontext sc;
992 if (upeek(tcp, 4*PT_USP, &usp) < 0)
994 if (umove(tcp, usp, &sc) < 0)
996 long_to_sigset(sc.sc_mask, &sigm);
997 tprints(sprintsigmask(") (mask ", &sigm, 0));
1000 #elif defined(ALPHA)
1001 if (entering(tcp)) {
1003 struct sigcontext_struct sc;
1005 if (upeek(tcp, REG_FP, &fp) < 0)
1007 if (umove(tcp, fp, &sc) < 0)
1009 long_to_sigset(sc.sc_mask, &sigm);
1010 tprints(sprintsigmask(") (mask ", &sigm, 0));
1013 #elif defined(SPARC) || defined(SPARC64)
1014 if (entering(tcp)) {
1016 struct pt_regs regs;
1019 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1020 perror("sigreturn: PTRACE_GETREGS");
1023 i1 = regs.u_regs[U_REG_O1];
1024 if (umove(tcp, i1, &si) < 0) {
1025 perror("sigreturn: umove");
1028 long_to_sigset(si.si_mask, &sigm);
1029 tprints(sprintsigmask(") (mask ", &sigm, 0));
1032 #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
1033 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
1035 if (entering(tcp)) {
1039 if (upeek(tcp, REG_SP, &sp) < 0)
1041 /* There are six words followed by a 128-byte siginfo. */
1042 sp = sp + 6 * 4 + 128;
1043 if (umove(tcp, sp, &uc) < 0)
1045 long_to_sigset(*(long *) &uc.uc_sigmask, &sigm);
1046 tprints(sprintsigmask(") (mask ", &sigm, 0));
1050 if (entering(tcp)) {
1052 struct pt_regs regs;
1055 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1056 perror("sigreturn: PTRACE_GETREGS");
1060 if (umove(tcp, sp, &si) < 0)
1062 long_to_sigset(si.si_mask, &sigm);
1063 tprints(sprintsigmask(") (mask ", &sigm, 0));
1066 #elif defined(CRISV10) || defined(CRISV32)
1067 if (entering(tcp)) {
1068 struct sigcontext sc;
1069 long regs[PT_MAX+1];
1071 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
1072 perror("sigreturn: PTRACE_GETREGS");
1075 if (umove(tcp, regs[PT_USP], &sc) < 0)
1077 long_to_sigset(sc.oldmask, &sigm);
1078 tprints(sprintsigmask(") (mask ", &sigm, 0));
1082 if (entering(tcp)) {
1087 /* offset of ucontext in the kernel's sigframe structure */
1088 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(struct siginfo)
1089 if (upeek(tcp, PTREGS_OFFSET_SP, &sp) < 0)
1091 if (umove(tcp, sp + SIGFRAME_UC_OFFSET, &uc) < 0)
1094 memcpy(&sigm, &uc.uc_sigmask, NSIG / 8);
1095 tprints(sprintsigmask(") (mask ", &sigm, 0));
1098 #elif defined(MICROBLAZE)
1099 /* TODO: Verify that this is correct... */
1100 if (entering(tcp)) {
1101 struct sigcontext sc;
1104 /* Read r1, the stack pointer. */
1105 if (upeek(tcp, 1 * 4, &sp) < 0)
1107 if (umove(tcp, sp, &sc) < 0)
1109 long_to_sigset(sc.oldmask, &sigm);
1110 tprints(sprintsigmask(") (mask ", &sigm, 0));
1114 #warning No sys_sigreturn() for this architecture
1115 #warning (no problem, just a reminder :-)
1121 sys_siggetmask(struct tcb *tcp)
1125 long_to_sigset(tcp->u_rval, &sigm);
1126 tcp->auxstr = sprintsigmask("mask ", &sigm, 0);
1128 return RVAL_HEX | RVAL_STR;
1132 sys_sigsuspend(struct tcb *tcp)
1134 if (entering(tcp)) {
1136 long_to_sigset(tcp->u_arg[2], &sigm);
1137 printsigmask(&sigm, 0);
1144 #if !defined SS_ONSTACK
1145 #define SS_ONSTACK 1
1146 #define SS_DISABLE 2
1147 #if __GLIBC_MINOR__ == 0
1157 static const struct xlat sigaltstack_flags[] = {
1158 { SS_ONSTACK, "SS_ONSTACK" },
1159 { SS_DISABLE, "SS_DISABLE" },
1166 print_stack_t(struct tcb *tcp, unsigned long addr)
1169 if (umove(tcp, addr, &ss) < 0)
1171 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1172 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1173 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1178 sys_sigaltstack(struct tcb *tcp)
1180 if (entering(tcp)) {
1181 if (tcp->u_arg[0] == 0)
1183 else if (print_stack_t(tcp, tcp->u_arg[0]) < 0)
1188 if (tcp->u_arg[1] == 0)
1190 else if (print_stack_t(tcp, tcp->u_arg[1]) < 0)
1196 #ifdef HAVE_SIGACTION
1199 sys_sigprocmask(struct tcb *tcp)
1202 if (entering(tcp)) {
1203 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1205 printsigmask(tcp->u_arg[1], 0);
1207 else if (!syserror(tcp)) {
1208 tcp->auxstr = sprintsigmask("old mask ", tcp->u_rval, 0);
1209 return RVAL_HEX | RVAL_STR;
1212 if (entering(tcp)) {
1213 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1215 print_sigset(tcp, tcp->u_arg[1], 0);
1221 else if (syserror(tcp))
1222 tprintf("%#lx", tcp->u_arg[2]);
1224 print_sigset(tcp, tcp->u_arg[2], 0);
1230 #endif /* HAVE_SIGACTION */
1233 sys_kill(struct tcb *tcp)
1235 if (entering(tcp)) {
1236 long pid = tcp->u_arg[0];
1237 #if SUPPORTED_PERSONALITIES > 1
1238 /* Sign-extend a 32-bit value when that's what it is. */
1239 if (personality_wordsize[current_personality] < sizeof pid)
1240 pid = (long) (int) pid;
1242 tprintf("%ld, %s", pid, signame(tcp->u_arg[1]));
1249 sys_tgkill(struct tcb *tcp)
1251 if (entering(tcp)) {
1252 tprintf("%ld, %ld, %s",
1253 tcp->u_arg[0], tcp->u_arg[1], signame(tcp->u_arg[2]));
1259 sys_sigpending(struct tcb *tcp)
1265 tprintf("%#lx", tcp->u_arg[0]);
1266 else if (copy_sigset(tcp, tcp->u_arg[0], &sigset) < 0)
1269 printsigmask(&sigset, 0);
1277 sys_rt_sigprocmask(struct tcb *tcp)
1281 /* Note: arg[3] is the length of the sigset. */
1282 if (entering(tcp)) {
1283 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1287 else if (copy_sigset_len(tcp, tcp->u_arg[1], &sigset, tcp->u_arg[3]) < 0)
1288 tprintf("%#lx, ", tcp->u_arg[1]);
1290 printsigmask(&sigset, 1);
1297 else if (syserror(tcp))
1298 tprintf("%#lx", tcp->u_arg[2]);
1299 else if (copy_sigset_len(tcp, tcp->u_arg[2], &sigset, tcp->u_arg[3]) < 0)
1302 printsigmask(&sigset, 1);
1303 tprintf(", %lu", tcp->u_arg[3]);
1309 /* Structure describing the action to be taken when a signal arrives. */
1310 struct new_sigaction
1312 __sighandler_t __sa_handler;
1313 unsigned long sa_flags;
1314 void (*sa_restorer) (void);
1315 /* Kernel treats sa_mask as an array of longs. */
1316 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1318 /* Same for i386-on-x86_64 and similar cases */
1319 struct new_sigaction32
1321 uint32_t __sa_handler;
1323 uint32_t sa_restorer;
1324 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1329 sys_rt_sigaction(struct tcb *tcp)
1331 struct new_sigaction sa;
1336 if (entering(tcp)) {
1337 printsignal(tcp->u_arg[0]);
1339 addr = tcp->u_arg[1];
1341 addr = tcp->u_arg[2];
1347 if (!verbose(tcp)) {
1348 tprintf("%#lx", addr);
1351 #if SUPPORTED_PERSONALITIES > 1
1352 if (personality_wordsize[current_personality] != sizeof(sa.sa_flags)
1353 && personality_wordsize[current_personality] == 4
1355 struct new_sigaction32 sa32;
1356 r = umove(tcp, addr, &sa32);
1358 memset(&sa, 0, sizeof(sa));
1359 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1360 sa.sa_flags = sa32.sa_flags;
1361 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1362 /* Kernel treats sa_mask as an array of longs.
1363 * For 32-bit process, "long" is uint32_t, thus, for example,
1364 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1365 * But for (64-bit) kernel, 32th bit in sa_mask is
1366 * 32th bit in 0th (64-bit) long!
1367 * For little-endian, it's the same.
1368 * For big-endian, we swap 32-bit words.
1370 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1375 r = umove(tcp, addr, &sa);
1381 /* Architectures using function pointers, like
1382 * hppa, may need to manipulate the function pointer
1383 * to compute the result of a comparison. However,
1384 * the SA_HANDLER function pointer exists only in
1385 * the address space of the traced process, and can't
1386 * be manipulated by strace. In order to prevent the
1387 * compiler from generating code to manipulate
1388 * SA_HANDLER we cast the function pointers to long. */
1389 if ((long)sa.__sa_handler == (long)SIG_ERR)
1390 tprints("{SIG_ERR, ");
1391 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1392 tprints("{SIG_DFL, ");
1393 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1394 tprints("{SIG_IGN, ");
1396 tprintf("{%#lx, ", (long) sa.__sa_handler);
1397 /* Questionable code below.
1398 * Kernel won't handle sys_rt_sigaction
1399 * with wrong sigset size (just returns EINVAL)
1400 * therefore tcp->u_arg[3(4)] _must_ be NSIG / 8 here,
1401 * and we always use smaller memcpy. */
1402 sigemptyset(&sigset);
1404 if (tcp->u_arg[4] <= sizeof(sigset))
1405 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[4]);
1407 if (tcp->u_arg[3] <= sizeof(sigset))
1408 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[3]);
1411 memcpy(&sigset, &sa.sa_mask, sizeof(sigset));
1412 printsigmask(&sigset, 1);
1414 printflags(sigact_flags, sa.sa_flags, "SA_???");
1416 if (sa.sa_flags & SA_RESTORER)
1417 tprintf(", %p", sa.sa_restorer);
1426 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1427 #elif defined(ALPHA)
1428 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1430 tprintf(", %lu", tcp->u_arg[3]);
1436 sys_rt_sigpending(struct tcb *tcp)
1442 tprintf("%#lx", tcp->u_arg[0]);
1443 else if (copy_sigset_len(tcp, tcp->u_arg[0],
1444 &sigset, tcp->u_arg[1]) < 0)
1447 printsigmask(&sigset, 1);
1453 sys_rt_sigsuspend(struct tcb *tcp)
1455 if (entering(tcp)) {
1457 if (copy_sigset_len(tcp, tcp->u_arg[0], &sigm, tcp->u_arg[1]) < 0)
1460 printsigmask(&sigm, 1);
1466 sys_rt_sigqueueinfo(struct tcb *tcp)
1468 if (entering(tcp)) {
1470 tprintf("%lu, ", tcp->u_arg[0]);
1471 printsignal(tcp->u_arg[1]);
1473 if (umove(tcp, tcp->u_arg[2], &si) < 0)
1474 tprintf("%#lx", tcp->u_arg[2]);
1476 printsiginfo(&si, verbose(tcp));
1481 int sys_rt_sigtimedwait(struct tcb *tcp)
1483 if (entering(tcp)) {
1486 if (copy_sigset_len(tcp, tcp->u_arg[0],
1487 &sigset, tcp->u_arg[3]) < 0)
1490 printsigmask(&sigset, 1);
1492 /* This is the only "return" parameter, */
1493 if (tcp->u_arg[1] != 0)
1495 /* ... if it's NULL, can decode all on entry */
1498 else if (tcp->u_arg[1] != 0) {
1499 /* syscall exit, and u_arg[1] wasn't NULL */
1501 tprintf("%#lx, ", tcp->u_arg[1]);
1504 if (umove(tcp, tcp->u_arg[1], &si) < 0)
1505 tprintf("%#lx, ", tcp->u_arg[1]);
1507 printsiginfo(&si, verbose(tcp));
1513 /* syscall exit, and u_arg[1] was NULL */
1516 print_timespec(tcp, tcp->u_arg[2]);
1517 tprintf(", %d", (int) tcp->u_arg[3]);
1522 sys_restart_syscall(struct tcb *tcp)
1525 tprints("<... resuming interrupted call ...>");
1530 do_signalfd(struct tcb *tcp, int flags_arg)
1532 if (entering(tcp)) {
1533 printfd(tcp, tcp->u_arg[0]);
1535 print_sigset(tcp, tcp->u_arg[1], 1);
1536 tprintf(", %lu", tcp->u_arg[2]);
1537 if (flags_arg >= 0) {
1539 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1546 sys_signalfd(struct tcb *tcp)
1548 return do_signalfd(tcp, -1);
1552 sys_signalfd4(struct tcb *tcp)
1554 return do_signalfd(tcp, 3);