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 # ifdef HAVE_STRUCT_PTRACE_PEEKSIGINFO_ARGS
55 # define ptrace_peeksiginfo_args XXX_ptrace_peeksiginfo_args
57 # include <linux/ptrace.h>
58 # undef ptrace_peeksiginfo_args
60 # undef pt_all_user_regs
64 # include <asm/ptrace_offsets.h>
67 #if defined(SPARC) || defined(SPARC64) || defined(MIPS)
69 struct pt_regs si_regs;
72 #elif defined HAVE_ASM_SIGCONTEXT_H
73 # if !defined(IA64) && !defined(X86_64) && !defined(X32)
74 # include <asm/sigcontext.h>
76 #else /* !HAVE_ASM_SIGCONTEXT_H */
77 # if defined M68K && !defined HAVE_STRUCT_SIGCONTEXT
79 unsigned long sc_mask;
87 unsigned short sc_formatvec;
90 #endif /* !HAVE_ASM_SIGCONTEXT_H */
93 # warning: NSIG is not defined, using 32
99 #if defined I386 || defined X86_64 || defined X32
100 /* The libc headers do not define this constant since it should only be
101 used by the implementation. So we define it here. */
103 # define SA_RESTORER 0x04000000
107 static const struct xlat sigact_flags[] = {
109 { SA_RESTORER, "SA_RESTORER" },
112 { SA_STACK, "SA_STACK" },
115 { SA_RESTART, "SA_RESTART" },
118 { SA_INTERRUPT, "SA_INTERRUPT" },
121 { SA_NODEFER, "SA_NODEFER" },
123 #if defined SA_NOMASK && SA_NODEFER != SA_NOMASK
124 { SA_NOMASK, "SA_NOMASK" },
127 { SA_RESETHAND, "SA_RESETHAND" },
129 #if defined SA_ONESHOT && SA_ONESHOT != SA_RESETHAND
130 { SA_ONESHOT, "SA_ONESHOT" },
133 { SA_SIGINFO, "SA_SIGINFO" },
136 { SA_RESETHAND, "SA_RESETHAND" },
139 { SA_ONSTACK, "SA_ONSTACK" },
142 { SA_NODEFER, "SA_NODEFER" },
145 { SA_NOCLDSTOP, "SA_NOCLDSTOP" },
148 { SA_NOCLDWAIT, "SA_NOCLDWAIT" },
151 { _SA_BSDCALL, "_SA_BSDCALL" },
154 { SA_NOPTRACE, "SA_NOPTRACE" },
159 static const struct xlat sigprocmaskcmds[] = {
160 { SIG_BLOCK, "SIG_BLOCK" },
161 { SIG_UNBLOCK, "SIG_UNBLOCK" },
162 { SIG_SETMASK, "SIG_SETMASK" },
164 { SIG_SETMASK32,"SIG_SETMASK32" },
169 #endif /* HAVE_SIGACTION */
171 /* Anonymous realtime signals. */
172 /* Under glibc 2.1, SIGRTMIN et al are functions, but __SIGRTMIN is a
173 constant. This is what we want. Otherwise, just use SIGRTMIN. */
176 #define __SIGRTMIN SIGRTMIN
177 #define __SIGRTMAX SIGRTMAX /* likewise */
181 /* Note on the size of sigset_t:
183 * In glibc, sigset_t is an array with space for 1024 bits (!),
184 * even though all arches supported by Linux have only 64 signals
185 * except MIPS, which has 128. IOW, it is 128 bytes long.
187 * In-kernel sigset_t is sized correctly (it is either 64 or 128 bit long).
188 * However, some old syscall return only 32 lower bits (one word).
189 * Example: sys_sigpending vs sys_rt_sigpending.
191 * Be aware of this fact when you try to
192 * memcpy(&tcp->u_arg[1], &something, sizeof(sigset_t))
193 * - sizeof(sigset_t) is much bigger than you think,
194 * it may overflow tcp->u_arg[] array, and it may try to copy more data
195 * than is really available in <something>.
197 * umoven(tcp, addr, sizeof(sigset_t), &sigset)
198 * may be a bad idea: it'll try to read much more data than needed
199 * to fetch a sigset_t.
200 * Use (NSIG / 8) as a size instead.
206 static char buf[sizeof("SIGRT_%d") + sizeof(int)*3];
208 if (sig >= 0 && sig < nsignals)
209 return signalent[sig];
211 if (sig >= __SIGRTMIN && sig <= __SIGRTMAX) {
212 sprintf(buf, "SIGRT_%d", (int)(sig - __SIGRTMIN));
216 sprintf(buf, "%d", sig);
221 sprintsigmask(const char *str, sigset_t *mask)
222 /* set might include realtime sigs */
224 /* Was [8 * sizeof(sigset_t) * 8], but
225 * glibc sigset_t is huge (1024 bits = 128 *bytes*),
226 * and we were ending up with 8k (!) buffer here.
228 * No Unix system can have sig > 255
229 * (waitpid API won't be able to indicate death from one)
230 * and sig 0 doesn't exist either.
231 * Therefore max possible no of sigs is 255: 1..255
233 static char outstr[8 * (255 * 2 / 3)];
241 /* Note: nsignals = ARRAY_SIZE(signalent[]),
242 * and that array may not have SIGRTnn.
245 maxsigs = __SIGRTMAX + 1; /* instead */
249 s = stpcpy(outstr, str);
251 for (i = 1; i < maxsigs; i++) {
252 if (sigismember(mask, i) == 1)
256 /* 1: show mask members, 0: show those which are NOT in mask */
257 show_members = (nsigs < nsignals * 2 / 3);
262 for (i = 1; i < maxsigs; i++) {
263 if (sigismember(mask, i) == show_members) {
266 s = stpcpy(s, signalent[i] + 3);
269 else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
270 s += sprintf(s, "RT_%u", i - __SIGRTMIN);
274 s += sprintf(s, "%u", i);
287 sprintsigmask_long(const char *str, long mask)
292 return sprintsigmask(str, &s);
296 printsigmask(sigset_t *mask)
298 tprints(sprintsigmask("", mask));
304 tprints(signame(nr));
308 print_sigset_addr_len(struct tcb *tcp, long addr, long len)
316 /* Here len is usually equals NSIG / 8 or current_wordsize.
317 * But we code this defensively:
321 tprintf("%#lx", addr);
327 if (umoven(tcp, addr, len, (char *)&ss) < 0)
333 #define ILL_ILLOPC 1 /* illegal opcode */
334 #define ILL_ILLOPN 2 /* illegal operand */
335 #define ILL_ILLADR 3 /* illegal addressing mode */
336 #define ILL_ILLTRP 4 /* illegal trap */
337 #define ILL_PRVOPC 5 /* privileged opcode */
338 #define ILL_PRVREG 6 /* privileged register */
339 #define ILL_COPROC 7 /* coprocessor error */
340 #define ILL_BADSTK 8 /* internal stack error */
341 #define FPE_INTDIV 1 /* integer divide by zero */
342 #define FPE_INTOVF 2 /* integer overflow */
343 #define FPE_FLTDIV 3 /* floating point divide by zero */
344 #define FPE_FLTOVF 4 /* floating point overflow */
345 #define FPE_FLTUND 5 /* floating point underflow */
346 #define FPE_FLTRES 6 /* floating point inexact result */
347 #define FPE_FLTINV 7 /* floating point invalid operation */
348 #define FPE_FLTSUB 8 /* subscript out of range */
349 #define SEGV_MAPERR 1 /* address not mapped to object */
350 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */
351 #define BUS_ADRALN 1 /* invalid address alignment */
352 #define BUS_ADRERR 2 /* non-existant physical address */
353 #define BUS_OBJERR 3 /* object specific hardware error */
354 #define TRAP_BRKPT 1 /* process breakpoint */
355 #define TRAP_TRACE 2 /* process trace trap */
356 #define CLD_EXITED 1 /* child has exited */
357 #define CLD_KILLED 2 /* child was killed */
358 #define CLD_DUMPED 3 /* child terminated abnormally */
359 #define CLD_TRAPPED 4 /* traced child has trapped */
360 #define CLD_STOPPED 5 /* child has stopped */
361 #define CLD_CONTINUED 6 /* stopped child has continued */
362 #define POLL_IN 1 /* data input available */
363 #define POLL_OUT 2 /* output buffers available */
364 #define POLL_MSG 3 /* input message available */
365 #define POLL_ERR 4 /* i/o error */
366 #define POLL_PRI 5 /* high priority input available */
367 #define POLL_HUP 6 /* device disconnected */
368 #define SI_KERNEL 0x80 /* sent by kernel */
369 #define SI_USER 0 /* sent by kill, sigsend, raise */
370 #define SI_QUEUE -1 /* sent by sigqueue */
371 #define SI_TIMER -2 /* sent by timer expiration */
372 #define SI_MESGQ -3 /* sent by real time mesq state change */
373 #define SI_ASYNCIO -4 /* sent by AIO completion */
374 #define SI_SIGIO -5 /* sent by SIGIO */
375 #define SI_TKILL -6 /* sent by tkill */
376 #define SI_ASYNCNL -60 /* sent by asynch name lookup completion */
380 # define SI_FROMUSER(sip) ((sip)->si_code <= 0)
383 static const struct xlat siginfo_codes[] = {
385 { SI_KERNEL, "SI_KERNEL" },
388 { SI_USER, "SI_USER" },
391 { SI_QUEUE, "SI_QUEUE" },
394 { SI_TIMER, "SI_TIMER" },
397 { SI_MESGQ, "SI_MESGQ" },
400 { SI_ASYNCIO, "SI_ASYNCIO" },
403 { SI_SIGIO, "SI_SIGIO" },
406 { SI_TKILL, "SI_TKILL" },
409 { SI_ASYNCNL, "SI_ASYNCNL" },
412 { SI_NOINFO, "SI_NOINFO" },
415 { SI_LWP, "SI_LWP" },
420 static const struct xlat sigill_codes[] = {
421 { ILL_ILLOPC, "ILL_ILLOPC" },
422 { ILL_ILLOPN, "ILL_ILLOPN" },
423 { ILL_ILLADR, "ILL_ILLADR" },
424 { ILL_ILLTRP, "ILL_ILLTRP" },
425 { ILL_PRVOPC, "ILL_PRVOPC" },
426 { ILL_PRVREG, "ILL_PRVREG" },
427 { ILL_COPROC, "ILL_COPROC" },
428 { ILL_BADSTK, "ILL_BADSTK" },
432 static const struct xlat sigfpe_codes[] = {
433 { FPE_INTDIV, "FPE_INTDIV" },
434 { FPE_INTOVF, "FPE_INTOVF" },
435 { FPE_FLTDIV, "FPE_FLTDIV" },
436 { FPE_FLTOVF, "FPE_FLTOVF" },
437 { FPE_FLTUND, "FPE_FLTUND" },
438 { FPE_FLTRES, "FPE_FLTRES" },
439 { FPE_FLTINV, "FPE_FLTINV" },
440 { FPE_FLTSUB, "FPE_FLTSUB" },
444 static const struct xlat sigtrap_codes[] = {
445 { TRAP_BRKPT, "TRAP_BRKPT" },
446 { TRAP_TRACE, "TRAP_TRACE" },
450 static const struct xlat sigchld_codes[] = {
451 { CLD_EXITED, "CLD_EXITED" },
452 { CLD_KILLED, "CLD_KILLED" },
453 { CLD_DUMPED, "CLD_DUMPED" },
454 { CLD_TRAPPED, "CLD_TRAPPED" },
455 { CLD_STOPPED, "CLD_STOPPED" },
456 { CLD_CONTINUED,"CLD_CONTINUED" },
460 static const struct xlat sigpoll_codes[] = {
461 { POLL_IN, "POLL_IN" },
462 { POLL_OUT, "POLL_OUT" },
463 { POLL_MSG, "POLL_MSG" },
464 { POLL_ERR, "POLL_ERR" },
465 { POLL_PRI, "POLL_PRI" },
466 { POLL_HUP, "POLL_HUP" },
470 static const struct xlat sigprof_codes[] = {
472 { PROF_SIG, "PROF_SIG" },
478 static const struct xlat sigemt_codes[] = {
480 { EMT_TAGOVF, "EMT_TAGOVF" },
486 static const struct xlat sigsegv_codes[] = {
487 { SEGV_MAPERR, "SEGV_MAPERR" },
488 { SEGV_ACCERR, "SEGV_ACCERR" },
492 static const struct xlat sigbus_codes[] = {
493 { BUS_ADRALN, "BUS_ADRALN" },
494 { BUS_ADRERR, "BUS_ADRERR" },
495 { BUS_OBJERR, "BUS_OBJERR" },
500 printsiginfo(siginfo_t *sip, int verbose)
504 if (sip->si_signo == 0) {
508 tprints("{si_signo=");
509 printsignal(sip->si_signo);
510 code = xlookup(siginfo_codes, sip->si_code);
512 switch (sip->si_signo) {
514 code = xlookup(sigtrap_codes, sip->si_code);
517 code = xlookup(sigchld_codes, sip->si_code);
520 code = xlookup(sigpoll_codes, sip->si_code);
523 code = xlookup(sigprof_codes, sip->si_code);
526 code = xlookup(sigill_codes, sip->si_code);
530 code = xlookup(sigemt_codes, sip->si_code);
534 code = xlookup(sigfpe_codes, sip->si_code);
537 code = xlookup(sigsegv_codes, sip->si_code);
540 code = xlookup(sigbus_codes, sip->si_code);
545 tprintf(", si_code=%s", code);
547 tprintf(", si_code=%#x", sip->si_code);
549 if (sip->si_code != SI_NOINFO)
553 if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
554 tprintf(", si_errno=%d", sip->si_errno);
556 tprintf(", si_errno=%s",
557 errnoent[sip->si_errno]);
560 if (SI_FROMUSER(sip)) {
561 tprintf(", si_pid=%lu, si_uid=%lu",
562 (unsigned long) sip->si_pid,
563 (unsigned long) sip->si_uid);
564 switch (sip->si_code) {
575 tprintf(", si_value=%d", sip->si_int);
584 tprintf(", si_value={int=%u, ptr=%#lx}",
586 (unsigned long) sip->si_ptr);
591 #endif /* SI_FROMUSER */
593 switch (sip->si_signo) {
595 tprintf(", si_pid=%ld, si_status=",
597 if (sip->si_code == CLD_EXITED)
598 tprintf("%d", sip->si_status);
600 printsignal(sip->si_status);
604 tprintf(", si_utime=%llu, si_stime=%llu",
605 (unsigned long long) sip->si_utime,
606 (unsigned long long) sip->si_stime);
608 case SIGILL: case SIGFPE:
609 case SIGSEGV: case SIGBUS:
610 tprintf(", si_addr=%#lx",
611 (unsigned long) sip->si_addr);
614 switch (sip->si_code) {
615 case POLL_IN: case POLL_OUT: case POLL_MSG:
616 tprintf(", si_band=%ld",
617 (long) sip->si_band);
622 if (sip->si_pid || sip->si_uid)
623 tprintf(", si_pid=%lu, si_uid=%lu",
624 (unsigned long) sip->si_pid,
625 (unsigned long) sip->si_uid);
631 tprintf(", si_value={int=%u, ptr=%#lx}",
633 (unsigned long) sip->si_ptr);
643 printsiginfo_at(struct tcb *tcp, long addr)
651 tprintf("%#lx", addr);
654 if (umove(tcp, addr, &si) < 0) {
658 printsiginfo(&si, verbose(tcp));
662 sys_sigsetmask(struct tcb *tcp)
665 tprints(sprintsigmask_long("", tcp->u_arg[0]));
667 else if (!syserror(tcp)) {
668 tcp->auxstr = sprintsigmask_long("old mask ", tcp->u_rval);
669 return RVAL_HEX | RVAL_STR;
674 #ifdef HAVE_SIGACTION
676 struct old_sigaction {
677 /* sa_handler may be a libc #define, need to use other name: */
678 void (*__sa_handler)(int);
679 unsigned long sa_mask;
680 unsigned long sa_flags;
681 void (*sa_restorer)(void);
685 sys_sigaction(struct tcb *tcp)
688 struct old_sigaction sa;
691 printsignal(tcp->u_arg[0]);
693 addr = tcp->u_arg[1];
695 addr = tcp->u_arg[2];
698 else if (!verbose(tcp))
699 tprintf("%#lx", addr);
700 else if (umove(tcp, addr, &sa) < 0)
703 /* Architectures using function pointers, like
704 * hppa, may need to manipulate the function pointer
705 * to compute the result of a comparison. However,
706 * the __sa_handler function pointer exists only in
707 * the address space of the traced process, and can't
708 * be manipulated by strace. In order to prevent the
709 * compiler from generating code to manipulate
710 * __sa_handler we cast the function pointers to long. */
711 if ((long)sa.__sa_handler == (long)SIG_ERR)
712 tprints("{SIG_ERR, ");
713 else if ((long)sa.__sa_handler == (long)SIG_DFL)
714 tprints("{SIG_DFL, ");
715 else if ((long)sa.__sa_handler == (long)SIG_IGN)
716 tprints("{SIG_IGN, ");
718 tprintf("{%#lx, ", (long) sa.__sa_handler);
719 tprints(sprintsigmask_long("", sa.sa_mask));
721 printflags(sigact_flags, sa.sa_flags, "SA_???");
723 if (sa.sa_flags & SA_RESTORER)
724 tprintf(", %p", sa.sa_restorer);
731 tprintf(", %#lx", (unsigned long) sa.sa_restorer);
736 sys_signal(struct tcb *tcp)
739 printsignal(tcp->u_arg[0]);
741 switch (tcp->u_arg[1]) {
752 tprintf("%#lx", tcp->u_arg[1]);
756 else if (!syserror(tcp)) {
757 switch (tcp->u_rval) {
759 tcp->auxstr = "SIG_ERR"; break;
761 tcp->auxstr = "SIG_DFL"; break;
763 tcp->auxstr = "SIG_IGN"; break;
767 return RVAL_HEX | RVAL_STR;
772 #endif /* HAVE_SIGACTION */
775 sys_sigreturn(struct tcb *tcp)
779 struct arm_sigcontext {
780 unsigned long trap_no;
781 unsigned long error_code;
782 unsigned long oldmask;
783 unsigned long arm_r0;
784 unsigned long arm_r1;
785 unsigned long arm_r2;
786 unsigned long arm_r3;
787 unsigned long arm_r4;
788 unsigned long arm_r5;
789 unsigned long arm_r6;
790 unsigned long arm_r7;
791 unsigned long arm_r8;
792 unsigned long arm_r9;
793 unsigned long arm_r10;
794 unsigned long arm_fp;
795 unsigned long arm_ip;
796 unsigned long arm_sp;
797 unsigned long arm_lr;
798 unsigned long arm_pc;
799 unsigned long arm_cpsr;
800 unsigned long fault_address;
802 struct arm_ucontext {
803 unsigned long uc_flags;
804 unsigned long uc_link; /* struct ucontext* */
805 /* The next three members comprise stack_t struct: */
806 unsigned long ss_sp; /* void* */
807 unsigned long ss_flags; /* int */
808 unsigned long ss_size; /* size_t */
809 struct arm_sigcontext sc;
810 /* These two members are sigset_t: */
811 unsigned long uc_sigmask[2];
812 /* more fields follow, which we aren't interested in */
814 struct arm_ucontext uc;
816 if (umove(tcp, arm_regs.ARM_sp, &uc) < 0)
818 /* Kernel fills out uc.sc.oldmask too when it sets up signal stack,
819 * but for sigmask restore, sigreturn syscall uses uc.uc_sigmask instead.
820 * tprints(sprintsigmask_long(") (mask ", uc.sc.oldmask));
823 ((uint32_t*)&sigm)[0] = uc.uc_sigmask[0];
824 ((uint32_t*)&sigm)[1] = uc.uc_sigmask[1];
825 tprints(sprintsigmask(") (mask ", &sigm));
827 #elif defined(S390) || defined(S390X)
830 struct sigcontext sc;
831 if (upeek(tcp->pid, PT_GPR15, &usp) < 0)
833 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
835 tprints(sprintsigmask(") (mask ", (sigset_t *)&sc.oldmask[0]));
837 #elif defined(I386) || defined(X86_64)
839 if (current_personality == 0) /* 64-bit */
843 struct i386_sigcontext_struct {
861 uint32_t esp_at_signal;
867 struct i386_fpstate {
875 uint8_t st[8][10]; /* 8*10 bytes: FP regs */
878 uint32_t fxsr_env[6];
881 uint8_t stx[8][16]; /* 8*16 bytes: FP regs, each padded to 16 bytes */
882 uint8_t xmm[8][16]; /* 8 XMM regs */
883 uint32_t padding1[44];
884 uint32_t padding2[12]; /* union with struct _fpx_sw_bytes */
887 struct i386_sigcontext_struct sc;
888 struct i386_fpstate fp;
889 uint32_t extramask[1];
891 /* On i386, sc is followed on stack by struct fpstate
892 * and after it an additional u32 extramask[1] which holds
893 * upper half of the mask.
899 if (umove(tcp, *i386_esp_ptr, &signal_stack) < 0)
901 sigemptyset(&sigmask.sig);
902 sigmask.mask[0] = signal_stack.sc.oldmask;
903 sigmask.mask[1] = signal_stack.extramask[0];
904 tprints(sprintsigmask(") (mask ", &sigmask.sig));
908 struct sigcontext sc;
911 /* offset of sigcontext in the kernel's sigframe structure: */
912 # define SIGFRAME_SC_OFFSET 0x90
913 if (upeek(tcp->pid, PT_R12, &sp) < 0)
915 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
918 memcpy(&sigm, &sc.sc_mask, NSIG / 8);
919 tprints(sprintsigmask(") (mask ", &sigm));
921 #elif defined(POWERPC)
924 struct sigcontext sc;
926 esp = ppc_regs.gpr[1];
928 /* Skip dummy stack frame. */
930 if (current_personality == 0)
937 if (umove(tcp, esp, &sc) < 0)
939 tprints(sprintsigmask_long(") (mask ", sc.oldmask));
944 struct sigcontext sc;
945 if (upeek(tcp->pid, 4*PT_USP, &usp) < 0)
947 if (umove(tcp, usp, &sc) < 0)
949 tprints(sprintsigmask_long(") (mask ", sc.sc_mask));
954 struct sigcontext sc;
955 if (upeek(tcp->pid, REG_FP, &fp) < 0)
957 if (umove(tcp, fp, &sc) < 0)
959 tprints(sprintsigmask_long(") (mask ", sc.sc_mask));
961 #elif defined(SPARC) || defined(SPARC64)
965 i1 = sparc_regs.u_regs[U_REG_O1];
966 if (umove(tcp, i1, &si) < 0) {
967 perror_msg("sigreturn: umove");
970 tprints(sprintsigmask_long(") (mask ", si.si_mask));
972 #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
973 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
979 if (upeek(tcp->pid, REG_SP, &sp) < 0)
981 /* There are six words followed by a 128-byte siginfo. */
982 sp = sp + 6 * 4 + 128;
983 if (umove(tcp, sp, &uc) < 0)
985 tprints(sprintsigmask_long(") (mask ", *(long *) &uc.uc_sigmask));
992 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
993 perror_msg("sigreturn: PTRACE_GETREGS");
997 if (umove(tcp, sp, &si) < 0)
999 tprints(sprintsigmask_long(") (mask ", si.si_mask));
1001 #elif defined(CRISV10) || defined(CRISV32)
1002 if (entering(tcp)) {
1003 struct sigcontext sc;
1004 long regs[PT_MAX+1];
1005 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
1006 perror_msg("sigreturn: PTRACE_GETREGS");
1009 if (umove(tcp, regs[PT_USP], &sc) < 0)
1011 tprints(sprintsigmask_long(") (mask ", sc.oldmask));
1014 if (entering(tcp)) {
1018 /* offset of ucontext in the kernel's sigframe structure */
1019 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(siginfo_t)
1020 if (umove(tcp, tile_regs.sp + SIGFRAME_UC_OFFSET, &uc) < 0)
1023 memcpy(&sigm, &uc.uc_sigmask, NSIG / 8);
1024 tprints(sprintsigmask(") (mask ", &sigm));
1026 #elif defined(MICROBLAZE)
1027 /* TODO: Verify that this is correct... */
1028 if (entering(tcp)) {
1029 struct sigcontext sc;
1031 /* Read r1, the stack pointer. */
1032 if (upeek(tcp->pid, 1 * 4, &sp) < 0)
1034 if (umove(tcp, sp, &sc) < 0)
1036 tprints(sprintsigmask_long(") (mask ", sc.oldmask));
1038 #elif defined(XTENSA)
1039 /* Xtensa only has rt_sys_sigreturn */
1041 /* ARC syscall ABI only supports rt_sys_sigreturn */
1043 # warning No sys_sigreturn() for this architecture
1044 # warning (no problem, just a reminder :-)
1050 sys_siggetmask(struct tcb *tcp)
1053 tcp->auxstr = sprintsigmask_long("mask ", tcp->u_rval);
1055 return RVAL_HEX | RVAL_STR;
1059 sys_sigsuspend(struct tcb *tcp)
1061 if (entering(tcp)) {
1062 tprints(sprintsigmask_long("", tcp->u_arg[2]));
1067 #if !defined SS_ONSTACK
1068 #define SS_ONSTACK 1
1069 #define SS_DISABLE 2
1072 static const struct xlat sigaltstack_flags[] = {
1073 { SS_ONSTACK, "SS_ONSTACK" },
1074 { SS_DISABLE, "SS_DISABLE" },
1079 print_stack_t(struct tcb *tcp, unsigned long addr)
1085 } else if (umove(tcp, addr, &ss) < 0) {
1086 tprintf("%#lx", addr);
1088 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1089 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1090 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1095 sys_sigaltstack(struct tcb *tcp)
1097 if (entering(tcp)) {
1098 print_stack_t(tcp, tcp->u_arg[0]);
1102 print_stack_t(tcp, tcp->u_arg[1]);
1107 #ifdef HAVE_SIGACTION
1109 /* "Old" sigprocmask, which operates with word-sized signal masks */
1111 sys_sigprocmask(struct tcb *tcp)
1114 if (entering(tcp)) {
1116 * Alpha/OSF is different: it doesn't pass in two pointers,
1117 * but rather passes in the new bitmask as an argument and
1118 * then returns the old bitmask. This "works" because we
1119 * only have 64 signals to worry about. If you want more,
1120 * use of the rt_sigprocmask syscall is required.
1122 * old = osf_sigprocmask(how, new);
1124 * ret = sigprocmask(how, &new, &old, ...);
1126 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1127 tprints(sprintsigmask_long(", ", tcp->u_arg[1]));
1129 else if (!syserror(tcp)) {
1130 tcp->auxstr = sprintsigmask_long("old mask ", tcp->u_rval);
1131 return RVAL_HEX | RVAL_STR;
1134 if (entering(tcp)) {
1135 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1137 print_sigset_addr_len(tcp, tcp->u_arg[1], current_wordsize);
1142 tprintf("%#lx", tcp->u_arg[2]);
1144 print_sigset_addr_len(tcp, tcp->u_arg[2], current_wordsize);
1146 # endif /* !ALPHA */
1150 #endif /* HAVE_SIGACTION */
1153 sys_kill(struct tcb *tcp)
1155 if (entering(tcp)) {
1157 widen_to_long(tcp->u_arg[0]),
1158 signame(tcp->u_arg[1])
1165 sys_tgkill(struct tcb *tcp)
1167 if (entering(tcp)) {
1168 tprintf("%ld, %ld, %s",
1169 widen_to_long(tcp->u_arg[0]),
1170 widen_to_long(tcp->u_arg[1]),
1171 signame(tcp->u_arg[2])
1178 sys_sigpending(struct tcb *tcp)
1182 tprintf("%#lx", tcp->u_arg[0]);
1184 print_sigset_addr_len(tcp, tcp->u_arg[0], current_wordsize);
1190 sys_rt_sigprocmask(struct tcb *tcp)
1192 /* Note: arg[3] is the length of the sigset. Kernel requires NSIG / 8 */
1193 if (entering(tcp)) {
1194 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1196 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[3]);
1201 tprintf("%#lx", tcp->u_arg[2]);
1203 print_sigset_addr_len(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1204 tprintf(", %lu", tcp->u_arg[3]);
1209 /* Structure describing the action to be taken when a signal arrives. */
1210 struct new_sigaction
1212 /* sa_handler may be a libc #define, need to use other name: */
1213 void (*__sa_handler)(int);
1214 unsigned long sa_flags;
1215 void (*sa_restorer)(void);
1216 /* Kernel treats sa_mask as an array of longs. */
1217 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1219 /* Same for i386-on-x86_64 and similar cases */
1220 struct new_sigaction32
1222 uint32_t __sa_handler;
1224 uint32_t sa_restorer;
1225 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1229 sys_rt_sigaction(struct tcb *tcp)
1231 struct new_sigaction sa;
1236 if (entering(tcp)) {
1237 printsignal(tcp->u_arg[0]);
1239 addr = tcp->u_arg[1];
1241 addr = tcp->u_arg[2];
1247 if (!verbose(tcp)) {
1248 tprintf("%#lx", addr);
1251 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
1252 if (current_wordsize != sizeof(sa.sa_flags) && current_wordsize == 4) {
1253 struct new_sigaction32 sa32;
1254 r = umove(tcp, addr, &sa32);
1256 memset(&sa, 0, sizeof(sa));
1257 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1258 sa.sa_flags = sa32.sa_flags;
1259 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1260 /* Kernel treats sa_mask as an array of longs.
1261 * For 32-bit process, "long" is uint32_t, thus, for example,
1262 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1263 * But for (64-bit) kernel, 32th bit in sa_mask is
1264 * 32th bit in 0th (64-bit) long!
1265 * For little-endian, it's the same.
1266 * For big-endian, we swap 32-bit words.
1268 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1273 r = umove(tcp, addr, &sa);
1279 /* Architectures using function pointers, like
1280 * hppa, may need to manipulate the function pointer
1281 * to compute the result of a comparison. However,
1282 * the __sa_handler function pointer exists only in
1283 * the address space of the traced process, and can't
1284 * be manipulated by strace. In order to prevent the
1285 * compiler from generating code to manipulate
1286 * __sa_handler we cast the function pointers to long. */
1287 if ((long)sa.__sa_handler == (long)SIG_ERR)
1288 tprints("{SIG_ERR, ");
1289 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1290 tprints("{SIG_DFL, ");
1291 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1292 tprints("{SIG_IGN, ");
1294 tprintf("{%#lx, ", (long) sa.__sa_handler);
1296 * Sigset size is in tcp->u_arg[4] (SPARC)
1297 * or in tcp->u_arg[3] (all other),
1298 * but kernel won't handle sys_rt_sigaction
1299 * with wrong sigset size (just returns EINVAL instead).
1300 * We just fetch the right size, which is NSIG / 8.
1302 sigemptyset(&sigset);
1303 memcpy(&sigset, &sa.sa_mask, NSIG / 8);
1304 printsigmask(&sigset);
1307 printflags(sigact_flags, sa.sa_flags, "SA_???");
1309 if (sa.sa_flags & SA_RESTORER)
1310 tprintf(", %p", sa.sa_restorer);
1318 #if defined(SPARC) || defined(SPARC64)
1319 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1320 #elif defined(ALPHA)
1321 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1323 tprintf(", %lu", tcp->u_arg[3]);
1329 sys_rt_sigpending(struct tcb *tcp)
1333 * One of the few syscalls where sigset size (arg[1])
1334 * is allowed to be <= NSIG / 8, not strictly ==.
1335 * This allows non-rt sigpending() syscall
1336 * to reuse rt_sigpending() code in kernel.
1339 tprintf("%#lx", tcp->u_arg[0]);
1341 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1342 tprintf(", %lu", tcp->u_arg[1]);
1348 sys_rt_sigsuspend(struct tcb *tcp)
1350 if (entering(tcp)) {
1351 /* NB: kernel requires arg[1] == NSIG / 8 */
1352 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1353 tprintf(", %lu", tcp->u_arg[1]);
1359 print_sigqueueinfo(struct tcb *tcp, int sig, unsigned long uinfo)
1363 printsiginfo_at(tcp, uinfo);
1367 sys_rt_sigqueueinfo(struct tcb *tcp)
1369 if (entering(tcp)) {
1370 tprintf("%lu, ", tcp->u_arg[0]);
1371 print_sigqueueinfo(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1377 sys_rt_tgsigqueueinfo(struct tcb *tcp)
1379 if (entering(tcp)) {
1380 tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
1381 print_sigqueueinfo(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1386 int sys_rt_sigtimedwait(struct tcb *tcp)
1388 /* NB: kernel requires arg[3] == NSIG / 8 */
1389 if (entering(tcp)) {
1390 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[3]);
1392 /* This is the only "return" parameter, */
1393 if (tcp->u_arg[1] != 0)
1395 /* ... if it's NULL, can decode all on entry */
1398 else if (tcp->u_arg[1] != 0) {
1399 /* syscall exit, and u_arg[1] wasn't NULL */
1400 printsiginfo_at(tcp, tcp->u_arg[1]);
1404 /* syscall exit, and u_arg[1] was NULL */
1407 print_timespec(tcp, tcp->u_arg[2]);
1408 tprintf(", %lu", tcp->u_arg[3]);
1413 sys_restart_syscall(struct tcb *tcp)
1416 tprints("<... resuming interrupted call ...>");
1421 do_signalfd(struct tcb *tcp, int flags_arg)
1423 /* NB: kernel requires arg[2] == NSIG / 8 */
1424 if (entering(tcp)) {
1425 printfd(tcp, tcp->u_arg[0]);
1427 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1428 tprintf(", %lu", tcp->u_arg[2]);
1429 if (flags_arg >= 0) {
1431 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1438 sys_signalfd(struct tcb *tcp)
1440 return do_signalfd(tcp, -1);
1444 sys_signalfd4(struct tcb *tcp)
1446 return do_signalfd(tcp, 3);