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 #include <sys/ucontext.h>
49 #ifndef PTRACE_PEEKUSR
50 # define PTRACE_PEEKUSR PTRACE_PEEKUSER
52 #ifndef PTRACE_POKEUSR
53 # define PTRACE_POKEUSR PTRACE_POKEUSER
55 #elif defined(HAVE_LINUX_PTRACE_H)
57 # ifdef HAVE_STRUCT_IA64_FPREG
58 # define ia64_fpreg XXX_ia64_fpreg
60 # ifdef HAVE_STRUCT_PT_ALL_USER_REGS
61 # define pt_all_user_regs XXX_pt_all_user_regs
63 #include <linux/ptrace.h>
65 # undef pt_all_user_regs
72 # include <asm/ptrace_offsets.h>
75 #if defined (LINUX) && defined (SPARC64)
76 # undef PTRACE_GETREGS
77 # define PTRACE_GETREGS PTRACE_GETREGS64
78 # undef PTRACE_SETREGS
79 # define PTRACE_SETREGS PTRACE_SETREGS64
80 #endif /* LINUX && SPARC64 */
82 #if defined (SPARC) || defined (SPARC64) || defined (MIPS)
84 struct pt_regs si_regs;
87 #elif defined HAVE_ASM_SIGCONTEXT_H
88 #if !defined(IA64) && !defined(X86_64)
89 #include <asm/sigcontext.h>
90 #endif /* !IA64 && !X86_64 */
91 #else /* !HAVE_ASM_SIGCONTEXT_H */
92 #if defined I386 && !defined HAVE_STRUCT_SIGCONTEXT_STRUCT
93 struct sigcontext_struct {
94 unsigned short gs, __gsh;
95 unsigned short fs, __fsh;
96 unsigned short es, __esh;
97 unsigned short ds, __dsh;
106 unsigned long trapno;
109 unsigned short cs, __csh;
110 unsigned long eflags;
111 unsigned long esp_at_signal;
112 unsigned short ss, __ssh;
114 unsigned long oldmask;
118 #if defined M68K && !defined HAVE_STRUCT_SIGCONTEXT
121 unsigned long sc_mask;
122 unsigned long sc_usp;
127 unsigned short sc_sr;
129 unsigned short sc_formatvec;
133 #endif /* !HAVE_ASM_SIGCONTEXT_H */
136 #warning: NSIG is not defined, using 32
140 /* Ugh. Is this really correct? ARM has no RT signals?! */
147 #if defined(SUNOS4) || defined(FREEBSD)
149 static const struct xlat sigvec_flags[] = {
150 { SV_ONSTACK, "SV_ONSTACK" },
151 { SV_INTERRUPT, "SV_INTERRUPT" },
152 { SV_RESETHAND, "SV_RESETHAND" },
153 { SA_NOCLDSTOP, "SA_NOCLDSTOP" },
157 #endif /* SUNOS4 || FREEBSD */
159 #ifdef HAVE_SIGACTION
161 #if defined LINUX && (defined I386 || defined X86_64)
162 /* The libc headers do not define this constant since it should only be
163 used by the implementation. So we define it here. */
165 # define SA_RESTORER 0x04000000
169 static const struct xlat sigact_flags[] = {
171 { SA_RESTORER, "SA_RESTORER" },
174 { SA_STACK, "SA_STACK" },
177 { SA_RESTART, "SA_RESTART" },
180 { SA_INTERRUPT, "SA_INTERRUPT" },
183 { SA_NODEFER, "SA_NODEFER" },
185 #if defined SA_NOMASK && SA_NODEFER != SA_NOMASK
186 { SA_NOMASK, "SA_NOMASK" },
189 { SA_RESETHAND, "SA_RESETHAND" },
191 #if defined SA_ONESHOT && SA_ONESHOT != SA_RESETHAND
192 { SA_ONESHOT, "SA_ONESHOT" },
195 { SA_SIGINFO, "SA_SIGINFO" },
198 { SA_RESETHAND, "SA_RESETHAND" },
201 { SA_ONSTACK, "SA_ONSTACK" },
204 { SA_NODEFER, "SA_NODEFER" },
207 { SA_NOCLDSTOP, "SA_NOCLDSTOP" },
210 { SA_NOCLDWAIT, "SA_NOCLDWAIT" },
213 { _SA_BSDCALL, "_SA_BSDCALL" },
216 { SA_NOPTRACE, "SA_NOPTRACE" },
221 static const struct xlat sigprocmaskcmds[] = {
222 { SIG_BLOCK, "SIG_BLOCK" },
223 { SIG_UNBLOCK, "SIG_UNBLOCK" },
224 { SIG_SETMASK, "SIG_SETMASK" },
226 { SIG_SETMASK32,"SIG_SETMASK32" },
231 #endif /* HAVE_SIGACTION */
233 /* Anonymous realtime signals. */
234 /* Under glibc 2.1, SIGRTMIN et al are functions, but __SIGRTMIN is a
235 constant. This is what we want. Otherwise, just use SIGRTMIN. */
238 #define __SIGRTMIN SIGRTMIN
239 #define __SIGRTMAX SIGRTMAX /* likewise */
243 /* Note on the size of sigset_t:
245 * In glibc, sigset_t is an array with space for 1024 bits (!),
246 * even though all arches supported by Linux have only 64 signals
247 * except MIPS, which has 128. IOW, it is 128 bytes long.
249 * In-kernel sigset_t is sized correctly (it is either 64 or 128 bit long).
250 * However, some old syscall return only 32 lower bits (one word).
251 * Example: sys_sigpending vs sys_rt_sigpending.
253 * Be aware of this fact when you try to
254 * memcpy(&tcp->u_arg[1], &something, sizeof(sigset_t))
255 * - sizeof(sigset_t) is much bigger than you think,
256 * it may overflow tcp->u_arg[] array, and it may try to copy more data
257 * than is really available in <something>.
259 * umoven(tcp, addr, sizeof(sigset_t), &sigset)
260 * may be a bad idea: it'll try to read much more data than needed
261 * to fetch a sigset_t.
262 * Use (NSIG / 8) as a size instead.
268 static char buf[sizeof("SIGRT_%d") + sizeof(int)*3];
270 if (sig >= 0 && sig < nsignals)
271 return signalent[sig];
273 if (sig >= __SIGRTMIN && sig <= __SIGRTMAX) {
274 sprintf(buf, "SIGRT_%d", (int)(sig - __SIGRTMIN));
278 sprintf(buf, "%d", sig);
284 long_to_sigset(long l, sigset_t *s)
292 copy_sigset_len(struct tcb *tcp, long addr, sigset_t *s, int len)
294 if (len > sizeof(*s))
297 if (umoven(tcp, addr, len, (char *)s) < 0)
303 /* Original sigset is unsigned long */
304 #define copy_sigset(tcp, addr, s) copy_sigset_len(tcp, addr, s, sizeof(long))
306 #define copy_sigset(tcp, addr, s) copy_sigset_len(tcp, addr, s, sizeof(sigset_t))
310 sprintsigmask(const char *str, sigset_t *mask, int rt)
311 /* set might include realtime sigs */
313 /* Was [8 * sizeof(sigset_t) * 8], but
314 * glibc sigset_t is huge (1024 bits = 128 *bytes*),
315 * and we were ending up with 8k (!) buffer here.
317 * No Unix system can have sig > 255
318 * (waitpid API won't be able to indicate death from one)
319 * and sig 0 doesn't exist either.
320 * Therefore max possible no of sigs is 255: 1..255
322 static char outstr[8 * 255];
330 s = outstr + strlen(outstr);
335 maxsigs = __SIGRTMAX; /* instead */
337 for (i = 1; i < maxsigs; i++) {
338 if (sigismember(mask, i) == 1)
341 if (nsigs >= nsignals * 2 / 3) {
343 for (i = 1; i < maxsigs; i++) {
344 switch (sigismember(mask, i)) {
356 for (i = 1; i < maxsigs; i++) {
357 if (sigismember(mask, i) == 1) {
358 /* real-time signals on solaris don't have
362 sprintf(s, format, signalent[i] + 3);
365 else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
367 sprintf(tsig, "RT_%u", i - __SIGRTMIN);
368 sprintf(s, format, tsig);
370 #endif /* SIGRTMIN */
373 sprintf(tsig, "%u", i);
374 sprintf(s, format, tsig);
386 printsigmask(sigset_t *mask, int rt)
388 tprints(sprintsigmask("", mask, rt));
394 tprints(signame(nr));
398 print_sigset(struct tcb *tcp, long addr, int rt)
404 else if (copy_sigset(tcp, addr, &ss) < 0)
405 tprintf("%#lx", addr);
407 printsigmask(&ss, rt);
413 #define ILL_ILLOPC 1 /* illegal opcode */
414 #define ILL_ILLOPN 2 /* illegal operand */
415 #define ILL_ILLADR 3 /* illegal addressing mode */
416 #define ILL_ILLTRP 4 /* illegal trap */
417 #define ILL_PRVOPC 5 /* privileged opcode */
418 #define ILL_PRVREG 6 /* privileged register */
419 #define ILL_COPROC 7 /* coprocessor error */
420 #define ILL_BADSTK 8 /* internal stack error */
421 #define FPE_INTDIV 1 /* integer divide by zero */
422 #define FPE_INTOVF 2 /* integer overflow */
423 #define FPE_FLTDIV 3 /* floating point divide by zero */
424 #define FPE_FLTOVF 4 /* floating point overflow */
425 #define FPE_FLTUND 5 /* floating point underflow */
426 #define FPE_FLTRES 6 /* floating point inexact result */
427 #define FPE_FLTINV 7 /* floating point invalid operation */
428 #define FPE_FLTSUB 8 /* subscript out of range */
429 #define SEGV_MAPERR 1 /* address not mapped to object */
430 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */
431 #define BUS_ADRALN 1 /* invalid address alignment */
432 #define BUS_ADRERR 2 /* non-existant physical address */
433 #define BUS_OBJERR 3 /* object specific hardware error */
434 #define TRAP_BRKPT 1 /* process breakpoint */
435 #define TRAP_TRACE 2 /* process trace trap */
436 #define CLD_EXITED 1 /* child has exited */
437 #define CLD_KILLED 2 /* child was killed */
438 #define CLD_DUMPED 3 /* child terminated abnormally */
439 #define CLD_TRAPPED 4 /* traced child has trapped */
440 #define CLD_STOPPED 5 /* child has stopped */
441 #define CLD_CONTINUED 6 /* stopped child has continued */
442 #define POLL_IN 1 /* data input available */
443 #define POLL_OUT 2 /* output buffers available */
444 #define POLL_MSG 3 /* input message available */
445 #define POLL_ERR 4 /* i/o error */
446 #define POLL_PRI 5 /* high priority input available */
447 #define POLL_HUP 6 /* device disconnected */
448 #define SI_KERNEL 0x80 /* sent by kernel */
449 #define SI_USER 0 /* sent by kill, sigsend, raise */
450 #define SI_QUEUE -1 /* sent by sigqueue */
451 #define SI_TIMER -2 /* sent by timer expiration */
452 #define SI_MESGQ -3 /* sent by real time mesq state change */
453 #define SI_ASYNCIO -4 /* sent by AIO completion */
454 #define SI_SIGIO -5 /* sent by SIGIO */
455 #define SI_TKILL -6 /* sent by tkill */
456 #define SI_ASYNCNL -60 /* sent by asynch name lookup completion */
458 #define SI_FROMUSER(sip) ((sip)->si_code <= 0)
462 #if __GLIBC_MINOR__ < 1
463 /* Type for data associated with a signal. */
470 # define __SI_MAX_SIZE 128
471 # define __SI_PAD_SIZE ((__SI_MAX_SIZE / sizeof(int)) - 3)
473 typedef struct siginfo
475 int si_signo; /* Signal number. */
476 int si_errno; /* If non-zero, an errno value associated with
477 this signal, as defined in <errno.h>. */
478 int si_code; /* Signal code. */
482 int _pad[__SI_PAD_SIZE];
487 __pid_t si_pid; /* Sending process ID. */
488 __uid_t si_uid; /* Real user ID of sending process. */
491 /* POSIX.1b timers. */
494 unsigned int _timer1;
495 unsigned int _timer2;
498 /* POSIX.1b signals. */
501 __pid_t si_pid; /* Sending process ID. */
502 __uid_t si_uid; /* Real user ID of sending process. */
503 sigval_t si_sigval; /* Signal value. */
509 __pid_t si_pid; /* Which child. */
510 int si_status; /* Exit value or signal. */
515 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS. */
518 void *si_addr; /* Faulting insn/memory ref. */
524 int si_band; /* Band event for SIGPOLL. */
530 #define si_pid _sifields._kill.si_pid
531 #define si_uid _sifields._kill.si_uid
532 #define si_status _sifields._sigchld.si_status
533 #define si_utime _sifields._sigchld.si_utime
534 #define si_stime _sifields._sigchld.si_stime
535 #define si_value _sifields._rt.si_sigval
536 #define si_int _sifields._rt.si_sigval.sival_int
537 #define si_ptr _sifields._rt.si_sigval.sival_ptr
538 #define si_addr _sifields._sigfault.si_addr
539 #define si_band _sifields._sigpoll.si_band
540 #define si_fd _sifields._sigpoll.si_fd
546 #if defined (SVR4) || defined (LINUX)
548 static const struct xlat siginfo_codes[] = {
550 { SI_KERNEL, "SI_KERNEL" },
553 { SI_USER, "SI_USER" },
556 { SI_QUEUE, "SI_QUEUE" },
559 { SI_TIMER, "SI_TIMER" },
562 { SI_MESGQ, "SI_MESGQ" },
565 { SI_ASYNCIO, "SI_ASYNCIO" },
568 { SI_SIGIO, "SI_SIGIO" },
571 { SI_TKILL, "SI_TKILL" },
574 { SI_ASYNCNL, "SI_ASYNCNL" },
577 { SI_NOINFO, "SI_NOINFO" },
580 { SI_LWP, "SI_LWP" },
585 static const struct xlat sigill_codes[] = {
586 { ILL_ILLOPC, "ILL_ILLOPC" },
587 { ILL_ILLOPN, "ILL_ILLOPN" },
588 { ILL_ILLADR, "ILL_ILLADR" },
589 { ILL_ILLTRP, "ILL_ILLTRP" },
590 { ILL_PRVOPC, "ILL_PRVOPC" },
591 { ILL_PRVREG, "ILL_PRVREG" },
592 { ILL_COPROC, "ILL_COPROC" },
593 { ILL_BADSTK, "ILL_BADSTK" },
597 static const struct xlat sigfpe_codes[] = {
598 { FPE_INTDIV, "FPE_INTDIV" },
599 { FPE_INTOVF, "FPE_INTOVF" },
600 { FPE_FLTDIV, "FPE_FLTDIV" },
601 { FPE_FLTOVF, "FPE_FLTOVF" },
602 { FPE_FLTUND, "FPE_FLTUND" },
603 { FPE_FLTRES, "FPE_FLTRES" },
604 { FPE_FLTINV, "FPE_FLTINV" },
605 { FPE_FLTSUB, "FPE_FLTSUB" },
609 static const struct xlat sigtrap_codes[] = {
610 { TRAP_BRKPT, "TRAP_BRKPT" },
611 { TRAP_TRACE, "TRAP_TRACE" },
615 static const struct xlat sigchld_codes[] = {
616 { CLD_EXITED, "CLD_EXITED" },
617 { CLD_KILLED, "CLD_KILLED" },
618 { CLD_DUMPED, "CLD_DUMPED" },
619 { CLD_TRAPPED, "CLD_TRAPPED" },
620 { CLD_STOPPED, "CLD_STOPPED" },
621 { CLD_CONTINUED,"CLD_CONTINUED" },
625 static const struct xlat sigpoll_codes[] = {
626 { POLL_IN, "POLL_IN" },
627 { POLL_OUT, "POLL_OUT" },
628 { POLL_MSG, "POLL_MSG" },
629 { POLL_ERR, "POLL_ERR" },
630 { POLL_PRI, "POLL_PRI" },
631 { POLL_HUP, "POLL_HUP" },
635 static const struct xlat sigprof_codes[] = {
637 { PROF_SIG, "PROF_SIG" },
643 static const struct xlat sigemt_codes[] = {
645 { EMT_TAGOVF, "EMT_TAGOVF" },
651 static const struct xlat sigsegv_codes[] = {
652 { SEGV_MAPERR, "SEGV_MAPERR" },
653 { SEGV_ACCERR, "SEGV_ACCERR" },
657 static const struct xlat sigbus_codes[] = {
658 { BUS_ADRALN, "BUS_ADRALN" },
659 { BUS_ADRERR, "BUS_ADRERR" },
660 { BUS_OBJERR, "BUS_OBJERR" },
665 printsiginfo(siginfo_t *sip, int verbose)
669 if (sip->si_signo == 0) {
673 tprints("{si_signo=");
674 printsignal(sip->si_signo);
675 code = xlookup(siginfo_codes, sip->si_code);
677 switch (sip->si_signo) {
679 code = xlookup(sigtrap_codes, sip->si_code);
682 code = xlookup(sigchld_codes, sip->si_code);
685 code = xlookup(sigpoll_codes, sip->si_code);
688 code = xlookup(sigprof_codes, sip->si_code);
691 code = xlookup(sigill_codes, sip->si_code);
695 code = xlookup(sigemt_codes, sip->si_code);
699 code = xlookup(sigfpe_codes, sip->si_code);
702 code = xlookup(sigsegv_codes, sip->si_code);
705 code = xlookup(sigbus_codes, sip->si_code);
710 tprintf(", si_code=%s", code);
712 tprintf(", si_code=%#x", sip->si_code);
714 if (sip->si_code != SI_NOINFO)
718 if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
719 tprintf(", si_errno=%d", sip->si_errno);
721 tprintf(", si_errno=%s",
722 errnoent[sip->si_errno]);
725 if (SI_FROMUSER(sip)) {
726 tprintf(", si_pid=%lu, si_uid=%lu",
727 (unsigned long) sip->si_pid,
728 (unsigned long) sip->si_uid);
729 switch (sip->si_code) {
740 tprintf(", si_value=%d", sip->si_int);
750 tprintf(", si_value={int=%u, ptr=%#lx}",
752 (unsigned long) sip->si_ptr);
758 #endif /* SI_FROMUSER */
760 switch (sip->si_signo) {
762 tprintf(", si_pid=%ld, si_status=",
764 if (sip->si_code == CLD_EXITED)
765 tprintf("%d", sip->si_status);
767 printsignal(sip->si_status);
772 tprintf(", si_utime=%lu, si_stime=%lu",
777 case SIGILL: case SIGFPE:
778 case SIGSEGV: case SIGBUS:
779 tprintf(", si_addr=%#lx",
780 (unsigned long) sip->si_addr);
783 switch (sip->si_code) {
784 case POLL_IN: case POLL_OUT: case POLL_MSG:
785 tprintf(", si_band=%ld",
786 (long) sip->si_band);
792 if (sip->si_pid || sip->si_uid)
793 tprintf(", si_pid=%lu, si_uid=%lu",
794 (unsigned long) sip->si_pid,
795 (unsigned long) sip->si_uid);
801 tprintf(", si_value={int=%u, ptr=%#lx}",
803 (unsigned long) sip->si_ptr);
813 #endif /* SVR4 || LINUX */
815 #if defined(SUNOS4) || defined(FREEBSD)
818 sys_sigvec(struct tcb *tcp)
824 printsignal(tcp->u_arg[0]);
826 addr = tcp->u_arg[1];
828 addr = tcp->u_arg[2];
832 else if (!verbose(tcp))
833 tprintf("%#lx", addr);
834 else if (umove(tcp, addr, &sv) < 0)
837 switch ((int) sv.sv_handler) {
839 tprints("{SIG_ERR}");
842 tprints("{SIG_DFL}");
845 tprints("{SIG_IGN}");
848 tprints("{SIG_HOLD}");
851 tprintf("{%#lx, ", (unsigned long) sv.sv_handler);
852 printsigmask(&sv.sv_mask, 0);
854 printflags(sigvec_flags, sv.sv_flags, "SV_???");
864 sys_sigpause(struct tcb *tcp)
866 if (entering(tcp)) { /* WTA: UD had a bug here: he forgot the braces */
868 long_to_sigset(tcp->u_arg[0], &sigm);
869 printsigmask(&sigm, 0);
875 sys_sigstack(struct tcb *tcp)
881 addr = tcp->u_arg[0];
883 addr = tcp->u_arg[1];
886 else if (umove(tcp, addr, &ss) < 0)
887 tprintf("%#lx", addr);
889 tprintf("{ss_sp %#lx ", (unsigned long) ss.ss_sp);
890 tprintf("ss_onstack %s}", ss.ss_onstack ? "YES" : "NO");
898 sys_sigcleanup(struct tcb *tcp)
903 #endif /* SUNOS4 || FREEBSD */
908 sys_sigsetmask(struct tcb *tcp)
912 long_to_sigset(tcp->u_arg[0], &sigm);
913 printsigmask(&sigm, 0);
915 else if (!syserror(tcp)) {
917 long_to_sigset(tcp->u_rval, &sigm);
918 tcp->auxstr = sprintsigmask("old mask ", &sigm, 0);
920 return RVAL_HEX | RVAL_STR;
925 #if defined(SUNOS4) || defined(FREEBSD)
927 sys_sigblock(struct tcb *tcp)
929 return sys_sigsetmask(tcp);
931 #endif /* SUNOS4 || FREEBSD */
935 #ifdef HAVE_SIGACTION
938 struct old_sigaction {
939 __sighandler_t __sa_handler;
940 unsigned long sa_mask;
941 unsigned long sa_flags;
942 void (*sa_restorer)(void);
944 #define SA_HANDLER __sa_handler
948 #define SA_HANDLER sa_handler
952 sys_sigaction(struct tcb *tcp)
957 struct old_sigaction sa;
964 printsignal(tcp->u_arg[0]);
966 addr = tcp->u_arg[1];
968 addr = tcp->u_arg[2];
971 else if (!verbose(tcp))
972 tprintf("%#lx", addr);
973 else if (umove(tcp, addr, &sa) < 0)
976 /* Architectures using function pointers, like
977 * hppa, may need to manipulate the function pointer
978 * to compute the result of a comparison. However,
979 * the SA_HANDLER function pointer exists only in
980 * the address space of the traced process, and can't
981 * be manipulated by strace. In order to prevent the
982 * compiler from generating code to manipulate
983 * SA_HANDLER we cast the function pointers to long. */
984 if ((long)sa.SA_HANDLER == (long)SIG_ERR)
985 tprints("{SIG_ERR, ");
986 else if ((long)sa.SA_HANDLER == (long)SIG_DFL)
987 tprints("{SIG_DFL, ");
988 else if ((long)sa.SA_HANDLER == (long)SIG_IGN)
989 tprints("{SIG_IGN, ");
991 tprintf("{%#lx, ", (long) sa.SA_HANDLER);
993 printsigmask(&sa.sa_mask, 0);
995 long_to_sigset(sa.sa_mask, &sigset);
996 printsigmask(&sigset, 0);
999 printflags(sigact_flags, sa.sa_flags, "SA_???");
1001 if (sa.sa_flags & SA_RESTORER)
1002 tprintf(", %p", sa.sa_restorer);
1010 tprintf(", %#lx", (unsigned long) sa.sa_restorer);
1016 sys_signal(struct tcb *tcp)
1018 if (entering(tcp)) {
1019 printsignal(tcp->u_arg[0]);
1021 switch (tcp->u_arg[1]) {
1022 case (long) SIG_ERR:
1025 case (long) SIG_DFL:
1028 case (long) SIG_IGN:
1032 tprintf("%#lx", tcp->u_arg[1]);
1036 else if (!syserror(tcp)) {
1037 switch (tcp->u_rval) {
1038 case (long) SIG_ERR:
1039 tcp->auxstr = "SIG_ERR"; break;
1040 case (long) SIG_DFL:
1041 tcp->auxstr = "SIG_DFL"; break;
1042 case (long) SIG_IGN:
1043 tcp->auxstr = "SIG_IGN"; break;
1047 return RVAL_HEX | RVAL_STR;
1054 sys_sighold(struct tcb *tcp)
1056 if (entering(tcp)) {
1057 printsignal(tcp->u_arg[0]);
1063 #endif /* HAVE_SIGACTION */
1068 sys_sigreturn(struct tcb *tcp)
1071 if (entering(tcp)) {
1072 struct pt_regs regs;
1073 struct sigcontext_struct sc;
1075 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (void *)®s) == -1)
1077 if (umove(tcp, regs.ARM_sp, &sc) < 0)
1079 long_to_sigset(sc.oldmask, &sigm);
1080 tprints(sprintsigmask(") (mask ", &sigm, 0));
1083 #elif defined(S390) || defined(S390X)
1084 if (entering(tcp)) {
1086 struct sigcontext_struct sc;
1087 if (upeek(tcp, PT_GPR15, &usp) < 0)
1089 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
1091 tprints(sprintsigmask(") (mask ", (sigset_t *)&sc.oldmask[0], 0));
1095 if (entering(tcp)) {
1096 struct sigcontext_struct sc;
1097 /* Note: on i386, sc is followed on stack by struct fpstate
1098 * and after it an additional u32 extramask[1] which holds
1099 * upper half of the mask. We can fetch it there
1100 * if/when we'd want to display the full mask...
1103 if (umove(tcp, i386_regs.esp, &sc) < 0)
1105 long_to_sigset(sc.oldmask, &sigm);
1106 tprints(sprintsigmask(") (mask ", &sigm, 0));
1110 if (entering(tcp)) {
1111 struct sigcontext sc;
1114 /* offset of sigcontext in the kernel's sigframe structure: */
1115 # define SIGFRAME_SC_OFFSET 0x90
1116 if (upeek(tcp, PT_R12, &sp) < 0)
1118 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
1121 memcpy(&sigm, &sc.sc_mask, NSIG / 8);
1122 tprints(sprintsigmask(") (mask ", &sigm, 0));
1125 #elif defined(POWERPC)
1126 if (entering(tcp)) {
1128 struct sigcontext_struct sc;
1130 if (upeek(tcp, sizeof(unsigned long) * PT_R1, &esp) < 0)
1132 /* Skip dummy stack frame. */
1134 if (current_personality == 0)
1141 if (umove(tcp, esp, &sc) < 0)
1143 long_to_sigset(sc.oldmask, &sigm);
1144 tprints(sprintsigmask(") (mask ", &sigm, 0));
1148 if (entering(tcp)) {
1150 struct sigcontext sc;
1152 if (upeek(tcp, 4*PT_USP, &usp) < 0)
1154 if (umove(tcp, usp, &sc) < 0)
1156 long_to_sigset(sc.sc_mask, &sigm);
1157 tprints(sprintsigmask(") (mask ", &sigm, 0));
1160 #elif defined(ALPHA)
1161 if (entering(tcp)) {
1163 struct sigcontext_struct sc;
1165 if (upeek(tcp, REG_FP, &fp) < 0)
1167 if (umove(tcp, fp, &sc) < 0)
1169 long_to_sigset(sc.sc_mask, &sigm);
1170 tprints(sprintsigmask(") (mask ", &sigm, 0));
1173 #elif defined (SPARC) || defined (SPARC64)
1174 if (entering(tcp)) {
1176 struct pt_regs regs;
1179 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1180 perror("sigreturn: PTRACE_GETREGS");
1183 i1 = regs.u_regs[U_REG_O1];
1184 if (umove(tcp, i1, &si) < 0) {
1185 perror("sigreturn: umove");
1188 long_to_sigset(si.si_mask, &sigm);
1189 tprints(sprintsigmask(") (mask ", &sigm, 0));
1192 #elif defined (LINUX_MIPSN32) || defined (LINUX_MIPSN64)
1193 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
1195 if (entering(tcp)) {
1199 if (upeek(tcp, REG_SP, &sp) < 0)
1201 /* There are six words followed by a 128-byte siginfo. */
1202 sp = sp + 6 * 4 + 128;
1203 if (umove(tcp, sp, &uc) < 0)
1205 long_to_sigset(*(long *) &uc.uc_sigmask, &sigm);
1206 tprints(sprintsigmask(") (mask ", &sigm, 0));
1210 if (entering(tcp)) {
1212 struct pt_regs regs;
1215 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1216 perror("sigreturn: PTRACE_GETREGS");
1220 if (umove(tcp, sp, &si) < 0)
1222 long_to_sigset(si.si_mask, &sigm);
1223 tprints(sprintsigmask(") (mask ", &sigm, 0));
1226 #elif defined(CRISV10) || defined(CRISV32)
1227 if (entering(tcp)) {
1228 struct sigcontext sc;
1229 long regs[PT_MAX+1];
1231 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
1232 perror("sigreturn: PTRACE_GETREGS");
1235 if (umove(tcp, regs[PT_USP], &sc) < 0)
1237 long_to_sigset(sc.oldmask, &sigm);
1238 tprints(sprintsigmask(") (mask ", &sigm, 0));
1242 if (entering(tcp)) {
1247 /* offset of ucontext in the kernel's sigframe structure */
1248 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(struct siginfo)
1249 if (upeek(tcp, PTREGS_OFFSET_SP, &sp) < 0)
1251 if (umove(tcp, sp + SIGFRAME_UC_OFFSET, &uc) < 0)
1254 memcpy(&sigm, &uc.uc_sigmask, NSIG / 8);
1255 tprints(sprintsigmask(") (mask ", &sigm, 0));
1258 #elif defined(MICROBLAZE)
1259 /* TODO: Verify that this is correct... */
1260 if (entering(tcp)) {
1261 struct sigcontext sc;
1264 /* Read r1, the stack pointer. */
1265 if (upeek(tcp, 1 * 4, &sp) < 0)
1267 if (umove(tcp, sp, &sc) < 0)
1269 long_to_sigset(sc.oldmask, &sigm);
1270 tprints(sprintsigmask(") (mask ", &sigm, 0));
1274 #warning No sys_sigreturn() for this architecture
1275 #warning (no problem, just a reminder :-)
1281 sys_siggetmask(struct tcb *tcp)
1285 long_to_sigset(tcp->u_rval, &sigm);
1286 tcp->auxstr = sprintsigmask("mask ", &sigm, 0);
1288 return RVAL_HEX | RVAL_STR;
1292 sys_sigsuspend(struct tcb *tcp)
1294 if (entering(tcp)) {
1296 long_to_sigset(tcp->u_arg[2], &sigm);
1297 printsigmask(&sigm, 0);
1304 #if defined(SVR4) || defined(FREEBSD)
1307 sys_sigsuspend(struct tcb *tcp)
1311 if (entering(tcp)) {
1312 if (umove(tcp, tcp->u_arg[0], &sigset) < 0)
1315 printsigmask(&sigset, 0);
1320 static const struct xlat ucontext_flags[] = {
1321 { UC_SIGMASK, "UC_SIGMASK" },
1322 { UC_STACK, "UC_STACK" },
1323 { UC_CPU, "UC_CPU" },
1325 { UC_FPU, "UC_FPU" },
1328 { UC_INTR, "UC_INTR" },
1332 #endif /* !FREEBSD */
1333 #endif /* SVR4 || FREEBSD */
1335 #if defined SVR4 || defined LINUX || defined FREEBSD
1336 #if defined LINUX && !defined SS_ONSTACK
1337 #define SS_ONSTACK 1
1338 #define SS_DISABLE 2
1339 #if __GLIBC_MINOR__ == 0
1349 #define stack_t struct sigaltstack
1352 static const struct xlat sigaltstack_flags[] = {
1353 { SS_ONSTACK, "SS_ONSTACK" },
1354 { SS_DISABLE, "SS_DISABLE" },
1361 printcontext(struct tcb *tcp, ucontext_t *ucp)
1365 tprints("uc_flags=");
1366 printflags(ucontext_flags, ucp->uc_flags, "UC_???");
1367 tprintf(", uc_link=%#lx, ", (unsigned long) ucp->uc_link);
1369 tprints("uc_sigmask=");
1370 printsigmask(&ucp->uc_sigmask, 0);
1372 tprintf(", uc_stack={ss_sp=%#lx, ss_size=%d, ss_flags=",
1373 (unsigned long) ucp->uc_stack.ss_sp,
1374 ucp->uc_stack.ss_size);
1375 printflags(sigaltstack_flags, ucp->uc_stack.ss_flags, "SS_???");
1382 sys_getcontext(struct tcb *tcp)
1388 tprintf("%#lx", tcp->u_arg[0]);
1389 else if (!tcp->u_arg[0])
1391 else if (umove(tcp, tcp->u_arg[0], &uc) < 0)
1394 printcontext(tcp, &uc);
1400 sys_setcontext(struct tcb *tcp)
1404 if (entering(tcp)) {
1407 else if (umove(tcp, tcp->u_arg[0], &uc) < 0)
1410 printcontext(tcp, &uc);
1413 tcp->u_rval = tcp->u_error = 0;
1414 if (tcp->u_arg[0] == 0)
1423 #if defined(LINUX) || defined(FREEBSD)
1426 print_stack_t(struct tcb *tcp, unsigned long addr)
1429 if (umove(tcp, addr, &ss) < 0)
1431 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1432 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1433 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1438 sys_sigaltstack(struct tcb *tcp)
1440 if (entering(tcp)) {
1441 if (tcp->u_arg[0] == 0)
1443 else if (print_stack_t(tcp, tcp->u_arg[0]) < 0)
1448 if (tcp->u_arg[1] == 0)
1450 else if (print_stack_t(tcp, tcp->u_arg[1]) < 0)
1457 #ifdef HAVE_SIGACTION
1460 sys_sigprocmask(struct tcb *tcp)
1463 if (entering(tcp)) {
1464 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1466 printsigmask(tcp->u_arg[1], 0);
1468 else if (!syserror(tcp)) {
1469 tcp->auxstr = sprintsigmask("old mask ", tcp->u_rval, 0);
1470 return RVAL_HEX | RVAL_STR;
1473 if (entering(tcp)) {
1475 if (tcp->u_arg[0] == 0)
1479 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1481 print_sigset(tcp, tcp->u_arg[1], 0);
1487 else if (syserror(tcp))
1488 tprintf("%#lx", tcp->u_arg[2]);
1490 print_sigset(tcp, tcp->u_arg[2], 0);
1496 #endif /* HAVE_SIGACTION */
1499 sys_kill(struct tcb *tcp)
1501 if (entering(tcp)) {
1502 long pid = tcp->u_arg[0];
1503 #if SUPPORTED_PERSONALITIES > 1
1504 /* Sign-extend a 32-bit value when that's what it is. */
1505 if (personality_wordsize[current_personality] < sizeof pid)
1506 pid = (long) (int) pid;
1508 tprintf("%ld, %s", pid, signame(tcp->u_arg[1]));
1513 #if defined(FREEBSD) || defined(SUNOS4)
1515 sys_killpg(struct tcb *tcp)
1517 return sys_kill(tcp);
1519 #endif /* FREEBSD || SUNOS4 */
1523 sys_tgkill(struct tcb *tcp)
1525 if (entering(tcp)) {
1526 tprintf("%ld, %ld, %s",
1527 tcp->u_arg[0], tcp->u_arg[1], signame(tcp->u_arg[2]));
1534 sys_sigpending(struct tcb *tcp)
1540 tprintf("%#lx", tcp->u_arg[0]);
1541 else if (copy_sigset(tcp, tcp->u_arg[0], &sigset) < 0)
1544 printsigmask(&sigset, 0);
1550 int sys_sigwait(struct tcb *tcp)
1554 if (entering(tcp)) {
1555 if (copy_sigset(tcp, tcp->u_arg[0], &sigset) < 0)
1558 printsigmask(&sigset, 0);
1561 if (!syserror(tcp)) {
1562 tcp->auxstr = signalent[tcp->u_rval];
1563 return RVAL_DECIMAL | RVAL_STR;
1573 sys_rt_sigprocmask(struct tcb *tcp)
1577 /* Note: arg[3] is the length of the sigset. */
1578 if (entering(tcp)) {
1579 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1583 else if (copy_sigset_len(tcp, tcp->u_arg[1], &sigset, tcp->u_arg[3]) < 0)
1584 tprintf("%#lx, ", tcp->u_arg[1]);
1586 printsigmask(&sigset, 1);
1593 else if (syserror(tcp))
1594 tprintf("%#lx", tcp->u_arg[2]);
1595 else if (copy_sigset_len(tcp, tcp->u_arg[2], &sigset, tcp->u_arg[3]) < 0)
1598 printsigmask(&sigset, 1);
1599 tprintf(", %lu", tcp->u_arg[3]);
1605 /* Structure describing the action to be taken when a signal arrives. */
1606 struct new_sigaction
1608 __sighandler_t __sa_handler;
1609 unsigned long sa_flags;
1610 void (*sa_restorer) (void);
1611 /* Kernel treats sa_mask as an array of longs. */
1612 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1614 /* Same for i386-on-x86_64 and similar cases */
1615 struct new_sigaction32
1617 uint32_t __sa_handler;
1619 uint32_t sa_restorer;
1620 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1625 sys_rt_sigaction(struct tcb *tcp)
1627 struct new_sigaction sa;
1632 if (entering(tcp)) {
1633 printsignal(tcp->u_arg[0]);
1635 addr = tcp->u_arg[1];
1637 addr = tcp->u_arg[2];
1643 if (!verbose(tcp)) {
1644 tprintf("%#lx", addr);
1647 #if SUPPORTED_PERSONALITIES > 1
1648 if (personality_wordsize[current_personality] != sizeof(sa.sa_flags)
1649 && personality_wordsize[current_personality] == 4
1651 struct new_sigaction32 sa32;
1652 r = umove(tcp, addr, &sa32);
1654 memset(&sa, 0, sizeof(sa));
1655 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1656 sa.sa_flags = sa32.sa_flags;
1657 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1658 /* Kernel treats sa_mask as an array of longs.
1659 * For 32-bit process, "long" is uint32_t, thus, for example,
1660 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1661 * But for (64-bit) kernel, 32th bit in sa_mask is
1662 * 32th bit in 0th (64-bit) long!
1663 * For little-endian, it's the same.
1664 * For big-endian, we swap 32-bit words.
1666 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1671 r = umove(tcp, addr, &sa);
1677 /* Architectures using function pointers, like
1678 * hppa, may need to manipulate the function pointer
1679 * to compute the result of a comparison. However,
1680 * the SA_HANDLER function pointer exists only in
1681 * the address space of the traced process, and can't
1682 * be manipulated by strace. In order to prevent the
1683 * compiler from generating code to manipulate
1684 * SA_HANDLER we cast the function pointers to long. */
1685 if ((long)sa.__sa_handler == (long)SIG_ERR)
1686 tprints("{SIG_ERR, ");
1687 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1688 tprints("{SIG_DFL, ");
1689 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1690 tprints("{SIG_IGN, ");
1692 tprintf("{%#lx, ", (long) sa.__sa_handler);
1693 /* Questionable code below.
1694 * Kernel won't handle sys_rt_sigaction
1695 * with wrong sigset size (just returns EINVAL)
1696 * therefore tcp->u_arg[3(4)] _must_ be NSIG / 8 here,
1697 * and we always use smaller memcpy. */
1698 sigemptyset(&sigset);
1700 if (tcp->u_arg[4] <= sizeof(sigset))
1701 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[4]);
1703 if (tcp->u_arg[3] <= sizeof(sigset))
1704 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[3]);
1707 memcpy(&sigset, &sa.sa_mask, sizeof(sigset));
1708 printsigmask(&sigset, 1);
1710 printflags(sigact_flags, sa.sa_flags, "SA_???");
1712 if (sa.sa_flags & SA_RESTORER)
1713 tprintf(", %p", sa.sa_restorer);
1722 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1723 #elif defined(ALPHA)
1724 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1726 tprintf(", %lu", tcp->u_arg[3]);
1732 sys_rt_sigpending(struct tcb *tcp)
1738 tprintf("%#lx", tcp->u_arg[0]);
1739 else if (copy_sigset_len(tcp, tcp->u_arg[0],
1740 &sigset, tcp->u_arg[1]) < 0)
1743 printsigmask(&sigset, 1);
1749 sys_rt_sigsuspend(struct tcb *tcp)
1751 if (entering(tcp)) {
1753 if (copy_sigset_len(tcp, tcp->u_arg[0], &sigm, tcp->u_arg[1]) < 0)
1756 printsigmask(&sigm, 1);
1762 sys_rt_sigqueueinfo(struct tcb *tcp)
1764 if (entering(tcp)) {
1766 tprintf("%lu, ", tcp->u_arg[0]);
1767 printsignal(tcp->u_arg[1]);
1769 if (umove(tcp, tcp->u_arg[2], &si) < 0)
1770 tprintf("%#lx", tcp->u_arg[2]);
1772 printsiginfo(&si, verbose(tcp));
1777 int sys_rt_sigtimedwait(struct tcb *tcp)
1779 if (entering(tcp)) {
1782 if (copy_sigset_len(tcp, tcp->u_arg[0],
1783 &sigset, tcp->u_arg[3]) < 0)
1786 printsigmask(&sigset, 1);
1788 /* This is the only "return" parameter, */
1789 if (tcp->u_arg[1] != 0)
1791 /* ... if it's NULL, can decode all on entry */
1794 else if (tcp->u_arg[1] != 0) {
1795 /* syscall exit, and u_arg[1] wasn't NULL */
1797 tprintf("%#lx, ", tcp->u_arg[1]);
1800 if (umove(tcp, tcp->u_arg[1], &si) < 0)
1801 tprintf("%#lx, ", tcp->u_arg[1]);
1803 printsiginfo(&si, verbose(tcp));
1809 /* syscall exit, and u_arg[1] was NULL */
1812 print_timespec(tcp, tcp->u_arg[2]);
1813 tprintf(", %d", (int) tcp->u_arg[3]);
1818 sys_restart_syscall(struct tcb *tcp)
1821 tprints("<... resuming interrupted call ...>");
1826 do_signalfd(struct tcb *tcp, int flags_arg)
1828 if (entering(tcp)) {
1829 printfd(tcp, tcp->u_arg[0]);
1831 print_sigset(tcp, tcp->u_arg[1], 1);
1832 tprintf(", %lu", tcp->u_arg[2]);
1833 if (flags_arg >= 0) {
1835 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1842 sys_signalfd(struct tcb *tcp)
1844 return do_signalfd(tcp, -1);
1848 sys_signalfd4(struct tcb *tcp)
1850 return do_signalfd(tcp, 3);