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 static const struct xlat siginfo_codes[] = {
417 { SI_KERNEL, "SI_KERNEL" },
420 { SI_USER, "SI_USER" },
423 { SI_QUEUE, "SI_QUEUE" },
426 { SI_TIMER, "SI_TIMER" },
429 { SI_MESGQ, "SI_MESGQ" },
432 { SI_ASYNCIO, "SI_ASYNCIO" },
435 { SI_SIGIO, "SI_SIGIO" },
438 { SI_TKILL, "SI_TKILL" },
441 { SI_ASYNCNL, "SI_ASYNCNL" },
444 { SI_NOINFO, "SI_NOINFO" },
447 { SI_LWP, "SI_LWP" },
452 static const struct xlat sigill_codes[] = {
453 { ILL_ILLOPC, "ILL_ILLOPC" },
454 { ILL_ILLOPN, "ILL_ILLOPN" },
455 { ILL_ILLADR, "ILL_ILLADR" },
456 { ILL_ILLTRP, "ILL_ILLTRP" },
457 { ILL_PRVOPC, "ILL_PRVOPC" },
458 { ILL_PRVREG, "ILL_PRVREG" },
459 { ILL_COPROC, "ILL_COPROC" },
460 { ILL_BADSTK, "ILL_BADSTK" },
464 static const struct xlat sigfpe_codes[] = {
465 { FPE_INTDIV, "FPE_INTDIV" },
466 { FPE_INTOVF, "FPE_INTOVF" },
467 { FPE_FLTDIV, "FPE_FLTDIV" },
468 { FPE_FLTOVF, "FPE_FLTOVF" },
469 { FPE_FLTUND, "FPE_FLTUND" },
470 { FPE_FLTRES, "FPE_FLTRES" },
471 { FPE_FLTINV, "FPE_FLTINV" },
472 { FPE_FLTSUB, "FPE_FLTSUB" },
476 static const struct xlat sigtrap_codes[] = {
477 { TRAP_BRKPT, "TRAP_BRKPT" },
478 { TRAP_TRACE, "TRAP_TRACE" },
482 static const struct xlat sigchld_codes[] = {
483 { CLD_EXITED, "CLD_EXITED" },
484 { CLD_KILLED, "CLD_KILLED" },
485 { CLD_DUMPED, "CLD_DUMPED" },
486 { CLD_TRAPPED, "CLD_TRAPPED" },
487 { CLD_STOPPED, "CLD_STOPPED" },
488 { CLD_CONTINUED,"CLD_CONTINUED" },
492 static const struct xlat sigpoll_codes[] = {
493 { POLL_IN, "POLL_IN" },
494 { POLL_OUT, "POLL_OUT" },
495 { POLL_MSG, "POLL_MSG" },
496 { POLL_ERR, "POLL_ERR" },
497 { POLL_PRI, "POLL_PRI" },
498 { POLL_HUP, "POLL_HUP" },
502 static const struct xlat sigprof_codes[] = {
504 { PROF_SIG, "PROF_SIG" },
510 static const struct xlat sigemt_codes[] = {
512 { EMT_TAGOVF, "EMT_TAGOVF" },
518 static const struct xlat sigsegv_codes[] = {
519 { SEGV_MAPERR, "SEGV_MAPERR" },
520 { SEGV_ACCERR, "SEGV_ACCERR" },
524 static const struct xlat sigbus_codes[] = {
525 { BUS_ADRALN, "BUS_ADRALN" },
526 { BUS_ADRERR, "BUS_ADRERR" },
527 { BUS_OBJERR, "BUS_OBJERR" },
532 printsiginfo(siginfo_t *sip, int verbose)
536 if (sip->si_signo == 0) {
540 tprints("{si_signo=");
541 printsignal(sip->si_signo);
542 code = xlookup(siginfo_codes, sip->si_code);
544 switch (sip->si_signo) {
546 code = xlookup(sigtrap_codes, sip->si_code);
549 code = xlookup(sigchld_codes, sip->si_code);
552 code = xlookup(sigpoll_codes, sip->si_code);
555 code = xlookup(sigprof_codes, sip->si_code);
558 code = xlookup(sigill_codes, sip->si_code);
562 code = xlookup(sigemt_codes, sip->si_code);
566 code = xlookup(sigfpe_codes, sip->si_code);
569 code = xlookup(sigsegv_codes, sip->si_code);
572 code = xlookup(sigbus_codes, sip->si_code);
577 tprintf(", si_code=%s", code);
579 tprintf(", si_code=%#x", sip->si_code);
581 if (sip->si_code != SI_NOINFO)
585 if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
586 tprintf(", si_errno=%d", sip->si_errno);
588 tprintf(", si_errno=%s",
589 errnoent[sip->si_errno]);
592 if (SI_FROMUSER(sip)) {
593 tprintf(", si_pid=%lu, si_uid=%lu",
594 (unsigned long) sip->si_pid,
595 (unsigned long) sip->si_uid);
596 switch (sip->si_code) {
607 tprintf(", si_value=%d", sip->si_int);
616 tprintf(", si_value={int=%u, ptr=%#lx}",
618 (unsigned long) sip->si_ptr);
623 #endif /* SI_FROMUSER */
625 switch (sip->si_signo) {
627 tprintf(", si_pid=%ld, si_status=",
629 if (sip->si_code == CLD_EXITED)
630 tprintf("%d", sip->si_status);
632 printsignal(sip->si_status);
636 tprintf(", si_utime=%llu, si_stime=%llu",
637 (unsigned long long) sip->si_utime,
638 (unsigned long long) sip->si_stime);
640 case SIGILL: case SIGFPE:
641 case SIGSEGV: case SIGBUS:
642 tprintf(", si_addr=%#lx",
643 (unsigned long) sip->si_addr);
646 switch (sip->si_code) {
647 case POLL_IN: case POLL_OUT: case POLL_MSG:
648 tprintf(", si_band=%ld",
649 (long) sip->si_band);
654 if (sip->si_pid || sip->si_uid)
655 tprintf(", si_pid=%lu, si_uid=%lu",
656 (unsigned long) sip->si_pid,
657 (unsigned long) sip->si_uid);
663 tprintf(", si_value={int=%u, ptr=%#lx}",
665 (unsigned long) sip->si_ptr);
675 sys_sigsetmask(struct tcb *tcp)
679 long_to_sigset(tcp->u_arg[0], &sigm);
680 printsigmask(&sigm, 0);
682 else if (!syserror(tcp)) {
684 long_to_sigset(tcp->u_rval, &sigm);
685 tcp->auxstr = sprintsigmask("old mask ", &sigm, 0);
687 return RVAL_HEX | RVAL_STR;
692 #ifdef HAVE_SIGACTION
694 struct old_sigaction {
695 /* sa_handler may be a libc #define, need to use other name: */
696 void (*__sa_handler)(int);
697 unsigned long sa_mask;
698 unsigned long sa_flags;
699 void (*sa_restorer)(void);
703 sys_sigaction(struct tcb *tcp)
707 struct old_sigaction sa;
710 printsignal(tcp->u_arg[0]);
712 addr = tcp->u_arg[1];
714 addr = tcp->u_arg[2];
717 else if (!verbose(tcp))
718 tprintf("%#lx", addr);
719 else if (umove(tcp, addr, &sa) < 0)
722 /* Architectures using function pointers, like
723 * hppa, may need to manipulate the function pointer
724 * to compute the result of a comparison. However,
725 * the __sa_handler function pointer exists only in
726 * the address space of the traced process, and can't
727 * be manipulated by strace. In order to prevent the
728 * compiler from generating code to manipulate
729 * __sa_handler we cast the function pointers to long. */
730 if ((long)sa.__sa_handler == (long)SIG_ERR)
731 tprints("{SIG_ERR, ");
732 else if ((long)sa.__sa_handler == (long)SIG_DFL)
733 tprints("{SIG_DFL, ");
734 else if ((long)sa.__sa_handler == (long)SIG_IGN)
735 tprints("{SIG_IGN, ");
737 tprintf("{%#lx, ", (long) sa.__sa_handler);
738 long_to_sigset(sa.sa_mask, &sigset);
739 printsigmask(&sigset, 0);
741 printflags(sigact_flags, sa.sa_flags, "SA_???");
743 if (sa.sa_flags & SA_RESTORER)
744 tprintf(", %p", sa.sa_restorer);
751 tprintf(", %#lx", (unsigned long) sa.sa_restorer);
756 sys_signal(struct tcb *tcp)
759 printsignal(tcp->u_arg[0]);
761 switch (tcp->u_arg[1]) {
772 tprintf("%#lx", tcp->u_arg[1]);
776 else if (!syserror(tcp)) {
777 switch (tcp->u_rval) {
779 tcp->auxstr = "SIG_ERR"; break;
781 tcp->auxstr = "SIG_DFL"; break;
783 tcp->auxstr = "SIG_IGN"; break;
787 return RVAL_HEX | RVAL_STR;
792 #endif /* HAVE_SIGACTION */
795 sys_sigreturn(struct tcb *tcp)
799 struct sigcontext_struct sc;
801 if (umove(tcp, arm_regs.ARM_sp, &sc) < 0)
803 long_to_sigset(sc.oldmask, &sigm);
804 tprints(sprintsigmask(") (mask ", &sigm, 0));
806 #elif defined(S390) || defined(S390X)
809 struct sigcontext_struct sc;
810 if (upeek(tcp, PT_GPR15, &usp) < 0)
812 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
814 tprints(sprintsigmask(") (mask ", (sigset_t *)&sc.oldmask[0], 0));
818 struct sigcontext_struct sc;
819 /* Note: on i386, sc is followed on stack by struct fpstate
820 * and after it an additional u32 extramask[1] which holds
821 * upper half of the mask. We can fetch it there
822 * if/when we'd want to display the full mask...
825 if (umove(tcp, i386_regs.esp, &sc) < 0)
827 long_to_sigset(sc.oldmask, &sigm);
828 tprints(sprintsigmask(") (mask ", &sigm, 0));
832 struct sigcontext sc;
835 /* offset of sigcontext in the kernel's sigframe structure: */
836 # define SIGFRAME_SC_OFFSET 0x90
837 if (upeek(tcp, PT_R12, &sp) < 0)
839 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
842 memcpy(&sigm, &sc.sc_mask, NSIG / 8);
843 tprints(sprintsigmask(") (mask ", &sigm, 0));
845 #elif defined(POWERPC)
848 struct sigcontext_struct sc;
850 if (upeek(tcp, sizeof(unsigned long) * PT_R1, &esp) < 0)
852 /* Skip dummy stack frame. */
854 if (current_personality == 0)
861 if (umove(tcp, esp, &sc) < 0)
863 long_to_sigset(sc.oldmask, &sigm);
864 tprints(sprintsigmask(") (mask ", &sigm, 0));
869 struct sigcontext sc;
871 if (upeek(tcp, 4*PT_USP, &usp) < 0)
873 if (umove(tcp, usp, &sc) < 0)
875 long_to_sigset(sc.sc_mask, &sigm);
876 tprints(sprintsigmask(") (mask ", &sigm, 0));
881 struct sigcontext_struct sc;
883 if (upeek(tcp, REG_FP, &fp) < 0)
885 if (umove(tcp, fp, &sc) < 0)
887 long_to_sigset(sc.sc_mask, &sigm);
888 tprints(sprintsigmask(") (mask ", &sigm, 0));
890 #elif defined(SPARC) || defined(SPARC64)
895 i1 = regs.u_regs[U_REG_O1];
896 if (umove(tcp, i1, &si) < 0) {
897 perror_msg("%s", "sigreturn: umove");
900 long_to_sigset(si.si_mask, &sigm);
901 tprints(sprintsigmask(") (mask ", &sigm, 0));
903 #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
904 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
910 if (upeek(tcp, REG_SP, &sp) < 0)
912 /* There are six words followed by a 128-byte siginfo. */
913 sp = sp + 6 * 4 + 128;
914 if (umove(tcp, sp, &uc) < 0)
916 long_to_sigset(*(long *) &uc.uc_sigmask, &sigm);
917 tprints(sprintsigmask(") (mask ", &sigm, 0));
925 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
926 perror_msg("%s", "sigreturn: PTRACE_GETREGS");
930 if (umove(tcp, sp, &si) < 0)
932 long_to_sigset(si.si_mask, &sigm);
933 tprints(sprintsigmask(") (mask ", &sigm, 0));
935 #elif defined(CRISV10) || defined(CRISV32)
937 struct sigcontext sc;
940 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
941 perror_msg("%s", "sigreturn: PTRACE_GETREGS");
944 if (umove(tcp, regs[PT_USP], &sc) < 0)
946 long_to_sigset(sc.oldmask, &sigm);
947 tprints(sprintsigmask(") (mask ", &sigm, 0));
954 /* offset of ucontext in the kernel's sigframe structure */
955 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(struct siginfo)
956 if (umove(tcp, tile_regs.sp + SIGFRAME_UC_OFFSET, &uc) < 0)
959 memcpy(&sigm, &uc.uc_sigmask, NSIG / 8);
960 tprints(sprintsigmask(") (mask ", &sigm, 0));
962 #elif defined(MICROBLAZE)
963 /* TODO: Verify that this is correct... */
965 struct sigcontext sc;
968 /* Read r1, the stack pointer. */
969 if (upeek(tcp, 1 * 4, &sp) < 0)
971 if (umove(tcp, sp, &sc) < 0)
973 long_to_sigset(sc.oldmask, &sigm);
974 tprints(sprintsigmask(") (mask ", &sigm, 0));
976 #elif defined(X86_64)
977 /* no need to remind */
979 # warning No sys_sigreturn() for this architecture
980 # warning (no problem, just a reminder :-)
986 sys_siggetmask(struct tcb *tcp)
990 long_to_sigset(tcp->u_rval, &sigm);
991 tcp->auxstr = sprintsigmask("mask ", &sigm, 0);
993 return RVAL_HEX | RVAL_STR;
997 sys_sigsuspend(struct tcb *tcp)
1001 long_to_sigset(tcp->u_arg[2], &sigm);
1002 printsigmask(&sigm, 0);
1007 #if !defined SS_ONSTACK
1008 #define SS_ONSTACK 1
1009 #define SS_DISABLE 2
1012 static const struct xlat sigaltstack_flags[] = {
1013 { SS_ONSTACK, "SS_ONSTACK" },
1014 { SS_DISABLE, "SS_DISABLE" },
1019 print_stack_t(struct tcb *tcp, unsigned long addr)
1025 } else if (umove(tcp, addr, &ss) < 0) {
1026 tprintf("%#lx", addr);
1028 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1029 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1030 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1035 sys_sigaltstack(struct tcb *tcp)
1037 if (entering(tcp)) {
1038 print_stack_t(tcp, tcp->u_arg[0]);
1042 print_stack_t(tcp, tcp->u_arg[1]);
1047 #ifdef HAVE_SIGACTION
1050 sys_sigprocmask(struct tcb *tcp)
1054 if (entering(tcp)) {
1056 * Alpha/OSF is different: it doesn't pass in two pointers,
1057 * but rather passes in the new bitmask as an argument and
1058 * then returns the old bitmask. This "works" because we
1059 * only have 64 signals to worry about. If you want more,
1060 * use of the rt_sigprocmask syscall is required.
1062 * old = osf_sigprocmask(how, new);
1064 * ret = sigprocmask(how, &new, &old, ...);
1066 memcpy(&ss, &tcp->u_arg[1], sizeof(long));
1067 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1069 printsigmask(&ss, 0);
1071 else if (!syserror(tcp)) {
1072 memcpy(&ss, &tcp->u_rval, sizeof(long));
1073 tcp->auxstr = sprintsigmask("old mask ", &ss, 0);
1074 return RVAL_HEX | RVAL_STR;
1077 if (entering(tcp)) {
1078 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1080 print_sigset(tcp, tcp->u_arg[1], 0);
1086 else if (syserror(tcp))
1087 tprintf("%#lx", tcp->u_arg[2]);
1089 print_sigset(tcp, tcp->u_arg[2], 0);
1095 #endif /* HAVE_SIGACTION */
1098 sys_kill(struct tcb *tcp)
1100 if (entering(tcp)) {
1101 long pid = tcp->u_arg[0];
1102 #if SUPPORTED_PERSONALITIES > 1
1103 /* Sign-extend a 32-bit value when that's what it is. */
1104 if (current_wordsize < sizeof pid)
1105 pid = (long) (int) pid;
1107 tprintf("%ld, %s", pid, signame(tcp->u_arg[1]));
1113 sys_tgkill(struct tcb *tcp)
1115 if (entering(tcp)) {
1116 tprintf("%ld, %ld, %s",
1117 tcp->u_arg[0], tcp->u_arg[1], signame(tcp->u_arg[2]));
1123 sys_sigpending(struct tcb *tcp)
1129 tprintf("%#lx", tcp->u_arg[0]);
1130 else if (copy_sigset(tcp, tcp->u_arg[0], &sigset) < 0)
1133 printsigmask(&sigset, 0);
1139 sys_rt_sigprocmask(struct tcb *tcp)
1143 /* Note: arg[3] is the length of the sigset. */
1144 if (entering(tcp)) {
1145 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1149 else if (copy_sigset_len(tcp, tcp->u_arg[1], &sigset, tcp->u_arg[3]) < 0)
1150 tprintf("%#lx, ", tcp->u_arg[1]);
1152 printsigmask(&sigset, 1);
1159 else if (syserror(tcp))
1160 tprintf("%#lx", tcp->u_arg[2]);
1161 else if (copy_sigset_len(tcp, tcp->u_arg[2], &sigset, tcp->u_arg[3]) < 0)
1164 printsigmask(&sigset, 1);
1165 tprintf(", %lu", tcp->u_arg[3]);
1170 /* Structure describing the action to be taken when a signal arrives. */
1171 struct new_sigaction
1173 /* sa_handler may be a libc #define, need to use other name: */
1174 void (*__sa_handler)(int);
1175 unsigned long sa_flags;
1176 void (*sa_restorer)(void);
1177 /* Kernel treats sa_mask as an array of longs. */
1178 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1180 /* Same for i386-on-x86_64 and similar cases */
1181 struct new_sigaction32
1183 uint32_t __sa_handler;
1185 uint32_t sa_restorer;
1186 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1190 sys_rt_sigaction(struct tcb *tcp)
1192 struct new_sigaction sa;
1197 if (entering(tcp)) {
1198 printsignal(tcp->u_arg[0]);
1200 addr = tcp->u_arg[1];
1202 addr = tcp->u_arg[2];
1208 if (!verbose(tcp)) {
1209 tprintf("%#lx", addr);
1212 #if SUPPORTED_PERSONALITIES > 1
1214 if (current_wordsize != sizeof(sa.sa_flags) && current_wordsize == 4) {
1215 struct new_sigaction32 sa32;
1216 r = umove(tcp, addr, &sa32);
1218 memset(&sa, 0, sizeof(sa));
1219 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1220 sa.sa_flags = sa32.sa_flags;
1221 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1222 /* Kernel treats sa_mask as an array of longs.
1223 * For 32-bit process, "long" is uint32_t, thus, for example,
1224 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1225 * But for (64-bit) kernel, 32th bit in sa_mask is
1226 * 32th bit in 0th (64-bit) long!
1227 * For little-endian, it's the same.
1228 * For big-endian, we swap 32-bit words.
1230 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1236 r = umove(tcp, addr, &sa);
1242 /* Architectures using function pointers, like
1243 * hppa, may need to manipulate the function pointer
1244 * to compute the result of a comparison. However,
1245 * the __sa_handler function pointer exists only in
1246 * the address space of the traced process, and can't
1247 * be manipulated by strace. In order to prevent the
1248 * compiler from generating code to manipulate
1249 * __sa_handler we cast the function pointers to long. */
1250 if ((long)sa.__sa_handler == (long)SIG_ERR)
1251 tprints("{SIG_ERR, ");
1252 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1253 tprints("{SIG_DFL, ");
1254 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1255 tprints("{SIG_IGN, ");
1257 tprintf("{%#lx, ", (long) sa.__sa_handler);
1258 /* Questionable code below.
1259 * Kernel won't handle sys_rt_sigaction
1260 * with wrong sigset size (just returns EINVAL)
1261 * therefore tcp->u_arg[3(4)] _must_ be NSIG / 8 here,
1262 * and we always use smaller memcpy. */
1263 sigemptyset(&sigset);
1264 #if defined(SPARC) || defined(SPARC64)
1265 if (tcp->u_arg[4] <= sizeof(sigset))
1266 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[4]);
1268 if (tcp->u_arg[3] <= sizeof(sigset))
1269 memcpy(&sigset, &sa.sa_mask, tcp->u_arg[3]);
1272 memcpy(&sigset, &sa.sa_mask, sizeof(sigset));
1273 printsigmask(&sigset, 1);
1275 printflags(sigact_flags, sa.sa_flags, "SA_???");
1277 if (sa.sa_flags & SA_RESTORER)
1278 tprintf(", %p", sa.sa_restorer);
1286 #if defined(SPARC) || defined(SPARC64)
1287 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1288 #elif defined(ALPHA)
1289 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1291 tprintf(", %lu", tcp->u_arg[3]);
1297 sys_rt_sigpending(struct tcb *tcp)
1303 tprintf("%#lx", tcp->u_arg[0]);
1304 else if (copy_sigset_len(tcp, tcp->u_arg[0],
1305 &sigset, tcp->u_arg[1]) < 0)
1308 printsigmask(&sigset, 1);
1314 sys_rt_sigsuspend(struct tcb *tcp)
1316 if (entering(tcp)) {
1318 if (copy_sigset_len(tcp, tcp->u_arg[0], &sigm, tcp->u_arg[1]) < 0)
1321 printsigmask(&sigm, 1);
1327 print_sigqueueinfo(struct tcb *tcp, int sig, unsigned long uinfo)
1333 if (umove(tcp, uinfo, &si) < 0)
1334 tprintf("%#lx", uinfo);
1336 printsiginfo(&si, verbose(tcp));
1340 sys_rt_sigqueueinfo(struct tcb *tcp)
1342 if (entering(tcp)) {
1343 tprintf("%lu, ", tcp->u_arg[0]);
1344 print_sigqueueinfo(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1350 sys_rt_tgsigqueueinfo(struct tcb *tcp)
1352 if (entering(tcp)) {
1353 tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
1354 print_sigqueueinfo(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1359 int sys_rt_sigtimedwait(struct tcb *tcp)
1361 if (entering(tcp)) {
1364 if (copy_sigset_len(tcp, tcp->u_arg[0],
1365 &sigset, tcp->u_arg[3]) < 0)
1368 printsigmask(&sigset, 1);
1370 /* This is the only "return" parameter, */
1371 if (tcp->u_arg[1] != 0)
1373 /* ... if it's NULL, can decode all on entry */
1376 else if (tcp->u_arg[1] != 0) {
1377 /* syscall exit, and u_arg[1] wasn't NULL */
1379 tprintf("%#lx, ", tcp->u_arg[1]);
1382 if (umove(tcp, tcp->u_arg[1], &si) < 0)
1383 tprintf("%#lx, ", tcp->u_arg[1]);
1385 printsiginfo(&si, verbose(tcp));
1391 /* syscall exit, and u_arg[1] was NULL */
1394 print_timespec(tcp, tcp->u_arg[2]);
1395 tprintf(", %d", (int) tcp->u_arg[3]);
1400 sys_restart_syscall(struct tcb *tcp)
1403 tprints("<... resuming interrupted call ...>");
1408 do_signalfd(struct tcb *tcp, int flags_arg)
1410 if (entering(tcp)) {
1411 printfd(tcp, tcp->u_arg[0]);
1413 print_sigset(tcp, tcp->u_arg[1], 1);
1414 tprintf(", %lu", tcp->u_arg[2]);
1415 if (flags_arg >= 0) {
1417 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1424 sys_signalfd(struct tcb *tcp)
1426 return do_signalfd(tcp, -1);
1430 sys_signalfd4(struct tcb *tcp)
1432 return do_signalfd(tcp, 3);