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 #elif defined(HAVE_LINUX_PTRACE_H)
41 # undef PTRACE_SYSCALL
42 # ifdef HAVE_STRUCT_IA64_FPREG
43 # define ia64_fpreg XXX_ia64_fpreg
45 # ifdef HAVE_STRUCT_PT_ALL_USER_REGS
46 # define pt_all_user_regs XXX_pt_all_user_regs
48 # ifdef HAVE_STRUCT_PTRACE_PEEKSIGINFO_ARGS
49 # define ptrace_peeksiginfo_args XXX_ptrace_peeksiginfo_args
51 # include <linux/ptrace.h>
52 # undef ptrace_peeksiginfo_args
54 # undef pt_all_user_regs
58 # include <asm/ptrace_offsets.h>
61 #if defined(SPARC) || defined(SPARC64) || defined(MIPS)
63 struct pt_regs si_regs;
66 #elif defined HAVE_ASM_SIGCONTEXT_H
67 # if !defined(IA64) && !defined(X86_64) && !defined(X32)
68 # include <asm/sigcontext.h>
70 #else /* !HAVE_ASM_SIGCONTEXT_H */
71 # if defined M68K && !defined HAVE_STRUCT_SIGCONTEXT
73 unsigned long sc_mask;
81 unsigned short sc_formatvec;
84 #endif /* !HAVE_ASM_SIGCONTEXT_H */
87 # warning: NSIG is not defined, using 32
93 #if defined I386 || defined X86_64 || defined X32
94 /* The libc headers do not define this constant since it should only be
95 used by the implementation. So we define it here. */
97 # define SA_RESTORER 0x04000000
101 static const struct xlat sigact_flags[] = {
103 { SA_RESTORER, "SA_RESTORER" },
106 { SA_STACK, "SA_STACK" },
109 { SA_RESTART, "SA_RESTART" },
112 { SA_INTERRUPT, "SA_INTERRUPT" },
115 { SA_NODEFER, "SA_NODEFER" },
117 #if defined SA_NOMASK && SA_NODEFER != SA_NOMASK
118 { SA_NOMASK, "SA_NOMASK" },
121 { SA_RESETHAND, "SA_RESETHAND" },
123 #if defined SA_ONESHOT && SA_ONESHOT != SA_RESETHAND
124 { SA_ONESHOT, "SA_ONESHOT" },
127 { SA_SIGINFO, "SA_SIGINFO" },
130 { SA_RESETHAND, "SA_RESETHAND" },
133 { SA_ONSTACK, "SA_ONSTACK" },
136 { SA_NODEFER, "SA_NODEFER" },
139 { SA_NOCLDSTOP, "SA_NOCLDSTOP" },
142 { SA_NOCLDWAIT, "SA_NOCLDWAIT" },
145 { _SA_BSDCALL, "_SA_BSDCALL" },
148 { SA_NOPTRACE, "SA_NOPTRACE" },
153 static const struct xlat sigprocmaskcmds[] = {
154 { SIG_BLOCK, "SIG_BLOCK" },
155 { SIG_UNBLOCK, "SIG_UNBLOCK" },
156 { SIG_SETMASK, "SIG_SETMASK" },
158 { SIG_SETMASK32,"SIG_SETMASK32" },
163 #endif /* HAVE_SIGACTION */
165 /* Anonymous realtime signals. */
166 /* Under glibc 2.1, SIGRTMIN et al are functions, but __SIGRTMIN is a
167 constant. This is what we want. Otherwise, just use SIGRTMIN. */
170 #define __SIGRTMIN SIGRTMIN
171 #define __SIGRTMAX SIGRTMAX /* likewise */
175 /* Note on the size of sigset_t:
177 * In glibc, sigset_t is an array with space for 1024 bits (!),
178 * even though all arches supported by Linux have only 64 signals
179 * except MIPS, which has 128. IOW, it is 128 bytes long.
181 * In-kernel sigset_t is sized correctly (it is either 64 or 128 bit long).
182 * However, some old syscall return only 32 lower bits (one word).
183 * Example: sys_sigpending vs sys_rt_sigpending.
185 * Be aware of this fact when you try to
186 * memcpy(&tcp->u_arg[1], &something, sizeof(sigset_t))
187 * - sizeof(sigset_t) is much bigger than you think,
188 * it may overflow tcp->u_arg[] array, and it may try to copy more data
189 * than is really available in <something>.
191 * umoven(tcp, addr, sizeof(sigset_t), &sigset)
192 * may be a bad idea: it'll try to read much more data than needed
193 * to fetch a sigset_t.
194 * Use (NSIG / 8) as a size instead.
200 static char buf[sizeof("SIGRT_%d") + sizeof(int)*3];
202 if (sig >= 0 && sig < nsignals)
203 return signalent[sig];
205 if (sig >= __SIGRTMIN && sig <= __SIGRTMAX) {
206 sprintf(buf, "SIGRT_%d", (int)(sig - __SIGRTMIN));
210 sprintf(buf, "%d", sig);
215 sprintsigmask(const char *str, sigset_t *mask)
216 /* set might include realtime sigs */
218 /* Was [8 * sizeof(sigset_t) * 8], but
219 * glibc sigset_t is huge (1024 bits = 128 *bytes*),
220 * and we were ending up with 8k (!) buffer here.
222 * No Unix system can have sig > 255
223 * (waitpid API won't be able to indicate death from one)
224 * and sig 0 doesn't exist either.
225 * Therefore max possible no of sigs is 255: 1..255
227 static char outstr[8 * (255 * 2 / 3)];
235 /* Note: nsignals = ARRAY_SIZE(signalent[]),
236 * and that array may not have SIGRTnn.
239 maxsigs = __SIGRTMAX + 1; /* instead */
243 s = stpcpy(outstr, str);
245 for (i = 1; i < maxsigs; i++) {
246 if (sigismember(mask, i) == 1)
250 /* 1: show mask members, 0: show those which are NOT in mask */
251 show_members = (nsigs < nsignals * 2 / 3);
256 for (i = 1; i < maxsigs; i++) {
257 if (sigismember(mask, i) == show_members) {
260 s = stpcpy(s, signalent[i] + 3);
263 else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
264 s += sprintf(s, "RT_%u", i - __SIGRTMIN);
268 s += sprintf(s, "%u", i);
281 sprintsigmask_long(const char *str, long mask)
286 return sprintsigmask(str, &s);
290 printsigmask(sigset_t *mask)
292 tprints(sprintsigmask("", mask));
298 tprints(signame(nr));
302 print_sigset_addr_len(struct tcb *tcp, long addr, long len)
310 /* Here len is usually equals NSIG / 8 or current_wordsize.
311 * But we code this defensively:
315 tprintf("%#lx", addr);
321 if (umoven(tcp, addr, len, (char *)&ss) < 0)
327 #define ILL_ILLOPC 1 /* illegal opcode */
328 #define ILL_ILLOPN 2 /* illegal operand */
329 #define ILL_ILLADR 3 /* illegal addressing mode */
330 #define ILL_ILLTRP 4 /* illegal trap */
331 #define ILL_PRVOPC 5 /* privileged opcode */
332 #define ILL_PRVREG 6 /* privileged register */
333 #define ILL_COPROC 7 /* coprocessor error */
334 #define ILL_BADSTK 8 /* internal stack error */
335 #define FPE_INTDIV 1 /* integer divide by zero */
336 #define FPE_INTOVF 2 /* integer overflow */
337 #define FPE_FLTDIV 3 /* floating point divide by zero */
338 #define FPE_FLTOVF 4 /* floating point overflow */
339 #define FPE_FLTUND 5 /* floating point underflow */
340 #define FPE_FLTRES 6 /* floating point inexact result */
341 #define FPE_FLTINV 7 /* floating point invalid operation */
342 #define FPE_FLTSUB 8 /* subscript out of range */
343 #define SEGV_MAPERR 1 /* address not mapped to object */
344 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */
345 #define BUS_ADRALN 1 /* invalid address alignment */
346 #define BUS_ADRERR 2 /* non-existant physical address */
347 #define BUS_OBJERR 3 /* object specific hardware error */
348 #define TRAP_BRKPT 1 /* process breakpoint */
349 #define TRAP_TRACE 2 /* process trace trap */
350 #define CLD_EXITED 1 /* child has exited */
351 #define CLD_KILLED 2 /* child was killed */
352 #define CLD_DUMPED 3 /* child terminated abnormally */
353 #define CLD_TRAPPED 4 /* traced child has trapped */
354 #define CLD_STOPPED 5 /* child has stopped */
355 #define CLD_CONTINUED 6 /* stopped child has continued */
356 #define POLL_IN 1 /* data input available */
357 #define POLL_OUT 2 /* output buffers available */
358 #define POLL_MSG 3 /* input message available */
359 #define POLL_ERR 4 /* i/o error */
360 #define POLL_PRI 5 /* high priority input available */
361 #define POLL_HUP 6 /* device disconnected */
362 #define SI_KERNEL 0x80 /* sent by kernel */
363 #define SI_USER 0 /* sent by kill, sigsend, raise */
364 #define SI_QUEUE -1 /* sent by sigqueue */
365 #define SI_TIMER -2 /* sent by timer expiration */
366 #define SI_MESGQ -3 /* sent by real time mesq state change */
367 #define SI_ASYNCIO -4 /* sent by AIO completion */
368 #define SI_SIGIO -5 /* sent by SIGIO */
369 #define SI_TKILL -6 /* sent by tkill */
370 #define SI_ASYNCNL -60 /* sent by asynch name lookup completion */
374 # define SI_FROMUSER(sip) ((sip)->si_code <= 0)
377 static const struct xlat siginfo_codes[] = {
379 { SI_KERNEL, "SI_KERNEL" },
382 { SI_USER, "SI_USER" },
385 { SI_QUEUE, "SI_QUEUE" },
388 { SI_TIMER, "SI_TIMER" },
391 { SI_MESGQ, "SI_MESGQ" },
394 { SI_ASYNCIO, "SI_ASYNCIO" },
397 { SI_SIGIO, "SI_SIGIO" },
400 { SI_TKILL, "SI_TKILL" },
403 { SI_ASYNCNL, "SI_ASYNCNL" },
406 { SI_NOINFO, "SI_NOINFO" },
409 { SI_LWP, "SI_LWP" },
414 static const struct xlat sigill_codes[] = {
415 { ILL_ILLOPC, "ILL_ILLOPC" },
416 { ILL_ILLOPN, "ILL_ILLOPN" },
417 { ILL_ILLADR, "ILL_ILLADR" },
418 { ILL_ILLTRP, "ILL_ILLTRP" },
419 { ILL_PRVOPC, "ILL_PRVOPC" },
420 { ILL_PRVREG, "ILL_PRVREG" },
421 { ILL_COPROC, "ILL_COPROC" },
422 { ILL_BADSTK, "ILL_BADSTK" },
426 static const struct xlat sigfpe_codes[] = {
427 { FPE_INTDIV, "FPE_INTDIV" },
428 { FPE_INTOVF, "FPE_INTOVF" },
429 { FPE_FLTDIV, "FPE_FLTDIV" },
430 { FPE_FLTOVF, "FPE_FLTOVF" },
431 { FPE_FLTUND, "FPE_FLTUND" },
432 { FPE_FLTRES, "FPE_FLTRES" },
433 { FPE_FLTINV, "FPE_FLTINV" },
434 { FPE_FLTSUB, "FPE_FLTSUB" },
438 static const struct xlat sigtrap_codes[] = {
439 { TRAP_BRKPT, "TRAP_BRKPT" },
440 { TRAP_TRACE, "TRAP_TRACE" },
444 static const struct xlat sigchld_codes[] = {
445 { CLD_EXITED, "CLD_EXITED" },
446 { CLD_KILLED, "CLD_KILLED" },
447 { CLD_DUMPED, "CLD_DUMPED" },
448 { CLD_TRAPPED, "CLD_TRAPPED" },
449 { CLD_STOPPED, "CLD_STOPPED" },
450 { CLD_CONTINUED,"CLD_CONTINUED" },
454 static const struct xlat sigpoll_codes[] = {
455 { POLL_IN, "POLL_IN" },
456 { POLL_OUT, "POLL_OUT" },
457 { POLL_MSG, "POLL_MSG" },
458 { POLL_ERR, "POLL_ERR" },
459 { POLL_PRI, "POLL_PRI" },
460 { POLL_HUP, "POLL_HUP" },
464 static const struct xlat sigprof_codes[] = {
466 { PROF_SIG, "PROF_SIG" },
472 static const struct xlat sigemt_codes[] = {
474 { EMT_TAGOVF, "EMT_TAGOVF" },
480 static const struct xlat sigsegv_codes[] = {
481 { SEGV_MAPERR, "SEGV_MAPERR" },
482 { SEGV_ACCERR, "SEGV_ACCERR" },
486 static const struct xlat sigbus_codes[] = {
487 { BUS_ADRALN, "BUS_ADRALN" },
488 { BUS_ADRERR, "BUS_ADRERR" },
489 { BUS_OBJERR, "BUS_OBJERR" },
494 printsiginfo(siginfo_t *sip, int verbose)
498 if (sip->si_signo == 0) {
502 tprints("{si_signo=");
503 printsignal(sip->si_signo);
504 code = xlookup(siginfo_codes, sip->si_code);
506 switch (sip->si_signo) {
508 code = xlookup(sigtrap_codes, sip->si_code);
511 code = xlookup(sigchld_codes, sip->si_code);
514 code = xlookup(sigpoll_codes, sip->si_code);
517 code = xlookup(sigprof_codes, sip->si_code);
520 code = xlookup(sigill_codes, sip->si_code);
524 code = xlookup(sigemt_codes, sip->si_code);
528 code = xlookup(sigfpe_codes, sip->si_code);
531 code = xlookup(sigsegv_codes, sip->si_code);
534 code = xlookup(sigbus_codes, sip->si_code);
539 tprintf(", si_code=%s", code);
541 tprintf(", si_code=%#x", sip->si_code);
543 if (sip->si_code != SI_NOINFO)
547 if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
548 tprintf(", si_errno=%d", sip->si_errno);
550 tprintf(", si_errno=%s",
551 errnoent[sip->si_errno]);
554 if (SI_FROMUSER(sip)) {
555 tprintf(", si_pid=%lu, si_uid=%lu",
556 (unsigned long) sip->si_pid,
557 (unsigned long) sip->si_uid);
558 switch (sip->si_code) {
569 tprintf(", si_value=%d", sip->si_int);
578 tprintf(", si_value={int=%u, ptr=%#lx}",
580 (unsigned long) sip->si_ptr);
585 #endif /* SI_FROMUSER */
587 switch (sip->si_signo) {
589 tprintf(", si_pid=%ld, si_status=",
591 if (sip->si_code == CLD_EXITED)
592 tprintf("%d", sip->si_status);
594 printsignal(sip->si_status);
598 tprintf(", si_utime=%llu, si_stime=%llu",
599 (unsigned long long) sip->si_utime,
600 (unsigned long long) sip->si_stime);
602 case SIGILL: case SIGFPE:
603 case SIGSEGV: case SIGBUS:
604 tprintf(", si_addr=%#lx",
605 (unsigned long) sip->si_addr);
608 switch (sip->si_code) {
609 case POLL_IN: case POLL_OUT: case POLL_MSG:
610 tprintf(", si_band=%ld",
611 (long) sip->si_band);
616 if (sip->si_pid || sip->si_uid)
617 tprintf(", si_pid=%lu, si_uid=%lu",
618 (unsigned long) sip->si_pid,
619 (unsigned long) sip->si_uid);
625 tprintf(", si_value={int=%u, ptr=%#lx}",
627 (unsigned long) sip->si_ptr);
637 printsiginfo_at(struct tcb *tcp, long addr)
645 tprintf("%#lx", addr);
648 if (umove(tcp, addr, &si) < 0) {
652 printsiginfo(&si, verbose(tcp));
656 sys_sigsetmask(struct tcb *tcp)
659 tprints(sprintsigmask_long("", tcp->u_arg[0]));
661 else if (!syserror(tcp)) {
662 tcp->auxstr = sprintsigmask_long("old mask ", tcp->u_rval);
663 return RVAL_HEX | RVAL_STR;
668 #ifdef HAVE_SIGACTION
670 struct old_sigaction {
671 /* sa_handler may be a libc #define, need to use other name: */
672 void (*__sa_handler)(int);
673 unsigned long sa_mask;
674 unsigned long sa_flags;
675 void (*sa_restorer)(void);
679 sys_sigaction(struct tcb *tcp)
682 struct old_sigaction sa;
685 printsignal(tcp->u_arg[0]);
687 addr = tcp->u_arg[1];
689 addr = tcp->u_arg[2];
692 else if (!verbose(tcp))
693 tprintf("%#lx", addr);
694 else if (umove(tcp, addr, &sa) < 0)
697 /* Architectures using function pointers, like
698 * hppa, may need to manipulate the function pointer
699 * to compute the result of a comparison. However,
700 * the __sa_handler function pointer exists only in
701 * the address space of the traced process, and can't
702 * be manipulated by strace. In order to prevent the
703 * compiler from generating code to manipulate
704 * __sa_handler we cast the function pointers to long. */
705 if ((long)sa.__sa_handler == (long)SIG_ERR)
706 tprints("{SIG_ERR, ");
707 else if ((long)sa.__sa_handler == (long)SIG_DFL)
708 tprints("{SIG_DFL, ");
709 else if ((long)sa.__sa_handler == (long)SIG_IGN)
710 tprints("{SIG_IGN, ");
712 tprintf("{%#lx, ", (long) sa.__sa_handler);
713 tprints(sprintsigmask_long("", sa.sa_mask));
715 printflags(sigact_flags, sa.sa_flags, "SA_???");
717 if (sa.sa_flags & SA_RESTORER)
718 tprintf(", %p", sa.sa_restorer);
725 tprintf(", %#lx", (unsigned long) sa.sa_restorer);
730 sys_signal(struct tcb *tcp)
733 printsignal(tcp->u_arg[0]);
735 switch (tcp->u_arg[1]) {
746 tprintf("%#lx", tcp->u_arg[1]);
750 else if (!syserror(tcp)) {
751 switch (tcp->u_rval) {
753 tcp->auxstr = "SIG_ERR"; break;
755 tcp->auxstr = "SIG_DFL"; break;
757 tcp->auxstr = "SIG_IGN"; break;
761 return RVAL_HEX | RVAL_STR;
766 #endif /* HAVE_SIGACTION */
769 sys_sigreturn(struct tcb *tcp)
773 struct arm_sigcontext {
774 unsigned long trap_no;
775 unsigned long error_code;
776 unsigned long oldmask;
777 unsigned long arm_r0;
778 unsigned long arm_r1;
779 unsigned long arm_r2;
780 unsigned long arm_r3;
781 unsigned long arm_r4;
782 unsigned long arm_r5;
783 unsigned long arm_r6;
784 unsigned long arm_r7;
785 unsigned long arm_r8;
786 unsigned long arm_r9;
787 unsigned long arm_r10;
788 unsigned long arm_fp;
789 unsigned long arm_ip;
790 unsigned long arm_sp;
791 unsigned long arm_lr;
792 unsigned long arm_pc;
793 unsigned long arm_cpsr;
794 unsigned long fault_address;
796 struct arm_ucontext {
797 unsigned long uc_flags;
798 unsigned long uc_link; /* struct ucontext* */
799 /* The next three members comprise stack_t struct: */
800 unsigned long ss_sp; /* void* */
801 unsigned long ss_flags; /* int */
802 unsigned long ss_size; /* size_t */
803 struct arm_sigcontext sc;
804 /* These two members are sigset_t: */
805 unsigned long uc_sigmask[2];
806 /* more fields follow, which we aren't interested in */
808 struct arm_ucontext uc;
810 if (umove(tcp, arm_regs.ARM_sp, &uc) < 0)
812 /* Kernel fills out uc.sc.oldmask too when it sets up signal stack,
813 * but for sigmask restore, sigreturn syscall uses uc.uc_sigmask instead.
814 * tprints(sprintsigmask_long(") (mask ", uc.sc.oldmask));
817 ((uint32_t*)&sigm)[0] = uc.uc_sigmask[0];
818 ((uint32_t*)&sigm)[1] = uc.uc_sigmask[1];
819 tprints(sprintsigmask(") (mask ", &sigm));
821 #elif defined(S390) || defined(S390X)
824 struct sigcontext sc;
825 if (upeek(tcp->pid, PT_GPR15, &usp) < 0)
827 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
829 tprints(sprintsigmask(") (mask ", (sigset_t *)&sc.oldmask[0]));
831 #elif defined(I386) || defined(X86_64)
833 if (current_personality == 0) /* 64-bit */
837 struct i386_sigcontext_struct {
855 uint32_t esp_at_signal;
861 struct i386_fpstate {
869 uint8_t st[8][10]; /* 8*10 bytes: FP regs */
872 uint32_t fxsr_env[6];
875 uint8_t stx[8][16]; /* 8*16 bytes: FP regs, each padded to 16 bytes */
876 uint8_t xmm[8][16]; /* 8 XMM regs */
877 uint32_t padding1[44];
878 uint32_t padding2[12]; /* union with struct _fpx_sw_bytes */
881 struct i386_sigcontext_struct sc;
882 struct i386_fpstate fp;
883 uint32_t extramask[1];
885 /* On i386, sc is followed on stack by struct fpstate
886 * and after it an additional u32 extramask[1] which holds
887 * upper half of the mask.
893 if (umove(tcp, *i386_esp_ptr, &signal_stack) < 0)
895 sigemptyset(&sigmask.sig);
896 sigmask.mask[0] = signal_stack.sc.oldmask;
897 sigmask.mask[1] = signal_stack.extramask[0];
898 tprints(sprintsigmask(") (mask ", &sigmask.sig));
902 struct sigcontext sc;
905 /* offset of sigcontext in the kernel's sigframe structure: */
906 # define SIGFRAME_SC_OFFSET 0x90
907 if (upeek(tcp->pid, PT_R12, &sp) < 0)
909 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
912 memcpy(&sigm, &sc.sc_mask, NSIG / 8);
913 tprints(sprintsigmask(") (mask ", &sigm));
915 #elif defined(POWERPC)
918 struct sigcontext sc;
920 esp = ppc_regs.gpr[1];
922 /* Skip dummy stack frame. */
924 if (current_personality == 0)
931 if (umove(tcp, esp, &sc) < 0)
933 tprints(sprintsigmask_long(") (mask ", sc.oldmask));
938 struct sigcontext sc;
939 if (upeek(tcp->pid, 4*PT_USP, &usp) < 0)
941 if (umove(tcp, usp, &sc) < 0)
943 tprints(sprintsigmask_long(") (mask ", sc.sc_mask));
948 struct sigcontext sc;
949 if (upeek(tcp->pid, REG_FP, &fp) < 0)
951 if (umove(tcp, fp, &sc) < 0)
953 tprints(sprintsigmask_long(") (mask ", sc.sc_mask));
955 #elif defined(SPARC) || defined(SPARC64)
959 i1 = sparc_regs.u_regs[U_REG_O1];
960 if (umove(tcp, i1, &si) < 0) {
961 perror_msg("sigreturn: umove");
964 tprints(sprintsigmask_long(") (mask ", si.si_mask));
966 #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
967 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
973 if (upeek(tcp->pid, REG_SP, &sp) < 0)
975 /* There are six words followed by a 128-byte siginfo. */
976 sp = sp + 6 * 4 + 128;
977 if (umove(tcp, sp, &uc) < 0)
979 tprints(sprintsigmask_long(") (mask ", *(long *) &uc.uc_sigmask));
986 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
987 perror_msg("sigreturn: PTRACE_GETREGS");
991 if (umove(tcp, sp, &si) < 0)
993 tprints(sprintsigmask_long(") (mask ", si.si_mask));
995 #elif defined(CRISV10) || defined(CRISV32)
997 struct sigcontext sc;
999 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
1000 perror_msg("sigreturn: PTRACE_GETREGS");
1003 if (umove(tcp, regs[PT_USP], &sc) < 0)
1005 tprints(sprintsigmask_long(") (mask ", sc.oldmask));
1008 if (entering(tcp)) {
1012 /* offset of ucontext in the kernel's sigframe structure */
1013 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(siginfo_t)
1014 if (umove(tcp, tile_regs.sp + SIGFRAME_UC_OFFSET, &uc) < 0)
1017 memcpy(&sigm, &uc.uc_sigmask, NSIG / 8);
1018 tprints(sprintsigmask(") (mask ", &sigm));
1020 #elif defined(MICROBLAZE)
1021 /* TODO: Verify that this is correct... */
1022 if (entering(tcp)) {
1023 struct sigcontext sc;
1025 /* Read r1, the stack pointer. */
1026 if (upeek(tcp->pid, 1 * 4, &sp) < 0)
1028 if (umove(tcp, sp, &sc) < 0)
1030 tprints(sprintsigmask_long(") (mask ", sc.oldmask));
1032 #elif defined(XTENSA)
1033 /* Xtensa only has rt_sys_sigreturn */
1035 /* ARC syscall ABI only supports rt_sys_sigreturn */
1037 # warning No sys_sigreturn() for this architecture
1038 # warning (no problem, just a reminder :-)
1044 sys_siggetmask(struct tcb *tcp)
1047 tcp->auxstr = sprintsigmask_long("mask ", tcp->u_rval);
1049 return RVAL_HEX | RVAL_STR;
1053 sys_sigsuspend(struct tcb *tcp)
1055 if (entering(tcp)) {
1056 tprints(sprintsigmask_long("", tcp->u_arg[2]));
1061 #if !defined SS_ONSTACK
1062 #define SS_ONSTACK 1
1063 #define SS_DISABLE 2
1066 static const struct xlat sigaltstack_flags[] = {
1067 { SS_ONSTACK, "SS_ONSTACK" },
1068 { SS_DISABLE, "SS_DISABLE" },
1073 print_stack_t(struct tcb *tcp, unsigned long addr)
1079 } else if (umove(tcp, addr, &ss) < 0) {
1080 tprintf("%#lx", addr);
1082 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1083 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1084 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1089 sys_sigaltstack(struct tcb *tcp)
1091 if (entering(tcp)) {
1092 print_stack_t(tcp, tcp->u_arg[0]);
1096 print_stack_t(tcp, tcp->u_arg[1]);
1101 #ifdef HAVE_SIGACTION
1103 /* "Old" sigprocmask, which operates with word-sized signal masks */
1105 sys_sigprocmask(struct tcb *tcp)
1108 if (entering(tcp)) {
1110 * Alpha/OSF is different: it doesn't pass in two pointers,
1111 * but rather passes in the new bitmask as an argument and
1112 * then returns the old bitmask. This "works" because we
1113 * only have 64 signals to worry about. If you want more,
1114 * use of the rt_sigprocmask syscall is required.
1116 * old = osf_sigprocmask(how, new);
1118 * ret = sigprocmask(how, &new, &old, ...);
1120 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1121 tprints(sprintsigmask_long(", ", tcp->u_arg[1]));
1123 else if (!syserror(tcp)) {
1124 tcp->auxstr = sprintsigmask_long("old mask ", tcp->u_rval);
1125 return RVAL_HEX | RVAL_STR;
1128 if (entering(tcp)) {
1129 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1131 print_sigset_addr_len(tcp, tcp->u_arg[1], current_wordsize);
1136 tprintf("%#lx", tcp->u_arg[2]);
1138 print_sigset_addr_len(tcp, tcp->u_arg[2], current_wordsize);
1140 # endif /* !ALPHA */
1144 #endif /* HAVE_SIGACTION */
1147 sys_kill(struct tcb *tcp)
1149 if (entering(tcp)) {
1151 widen_to_long(tcp->u_arg[0]),
1152 signame(tcp->u_arg[1])
1159 sys_tgkill(struct tcb *tcp)
1161 if (entering(tcp)) {
1162 tprintf("%ld, %ld, %s",
1163 widen_to_long(tcp->u_arg[0]),
1164 widen_to_long(tcp->u_arg[1]),
1165 signame(tcp->u_arg[2])
1172 sys_sigpending(struct tcb *tcp)
1176 tprintf("%#lx", tcp->u_arg[0]);
1178 print_sigset_addr_len(tcp, tcp->u_arg[0], current_wordsize);
1184 sys_rt_sigprocmask(struct tcb *tcp)
1186 /* Note: arg[3] is the length of the sigset. Kernel requires NSIG / 8 */
1187 if (entering(tcp)) {
1188 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1190 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[3]);
1195 tprintf("%#lx", tcp->u_arg[2]);
1197 print_sigset_addr_len(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1198 tprintf(", %lu", tcp->u_arg[3]);
1203 /* Structure describing the action to be taken when a signal arrives. */
1204 struct new_sigaction
1206 /* sa_handler may be a libc #define, need to use other name: */
1207 void (*__sa_handler)(int);
1208 unsigned long sa_flags;
1209 void (*sa_restorer)(void);
1210 /* Kernel treats sa_mask as an array of longs. */
1211 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1213 /* Same for i386-on-x86_64 and similar cases */
1214 struct new_sigaction32
1216 uint32_t __sa_handler;
1218 uint32_t sa_restorer;
1219 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1223 sys_rt_sigaction(struct tcb *tcp)
1225 struct new_sigaction sa;
1230 if (entering(tcp)) {
1231 printsignal(tcp->u_arg[0]);
1233 addr = tcp->u_arg[1];
1235 addr = tcp->u_arg[2];
1241 if (!verbose(tcp)) {
1242 tprintf("%#lx", addr);
1245 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
1246 if (current_wordsize != sizeof(sa.sa_flags) && current_wordsize == 4) {
1247 struct new_sigaction32 sa32;
1248 r = umove(tcp, addr, &sa32);
1250 memset(&sa, 0, sizeof(sa));
1251 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1252 sa.sa_flags = sa32.sa_flags;
1253 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1254 /* Kernel treats sa_mask as an array of longs.
1255 * For 32-bit process, "long" is uint32_t, thus, for example,
1256 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1257 * But for (64-bit) kernel, 32th bit in sa_mask is
1258 * 32th bit in 0th (64-bit) long!
1259 * For little-endian, it's the same.
1260 * For big-endian, we swap 32-bit words.
1262 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1267 r = umove(tcp, addr, &sa);
1273 /* Architectures using function pointers, like
1274 * hppa, may need to manipulate the function pointer
1275 * to compute the result of a comparison. However,
1276 * the __sa_handler function pointer exists only in
1277 * the address space of the traced process, and can't
1278 * be manipulated by strace. In order to prevent the
1279 * compiler from generating code to manipulate
1280 * __sa_handler we cast the function pointers to long. */
1281 if ((long)sa.__sa_handler == (long)SIG_ERR)
1282 tprints("{SIG_ERR, ");
1283 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1284 tprints("{SIG_DFL, ");
1285 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1286 tprints("{SIG_IGN, ");
1288 tprintf("{%#lx, ", (long) sa.__sa_handler);
1290 * Sigset size is in tcp->u_arg[4] (SPARC)
1291 * or in tcp->u_arg[3] (all other),
1292 * but kernel won't handle sys_rt_sigaction
1293 * with wrong sigset size (just returns EINVAL instead).
1294 * We just fetch the right size, which is NSIG / 8.
1296 sigemptyset(&sigset);
1297 memcpy(&sigset, &sa.sa_mask, NSIG / 8);
1298 printsigmask(&sigset);
1301 printflags(sigact_flags, sa.sa_flags, "SA_???");
1303 if (sa.sa_flags & SA_RESTORER)
1304 tprintf(", %p", sa.sa_restorer);
1312 #if defined(SPARC) || defined(SPARC64)
1313 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1314 #elif defined(ALPHA)
1315 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1317 tprintf(", %lu", tcp->u_arg[3]);
1323 sys_rt_sigpending(struct tcb *tcp)
1327 * One of the few syscalls where sigset size (arg[1])
1328 * is allowed to be <= NSIG / 8, not strictly ==.
1329 * This allows non-rt sigpending() syscall
1330 * to reuse rt_sigpending() code in kernel.
1333 tprintf("%#lx", tcp->u_arg[0]);
1335 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1336 tprintf(", %lu", tcp->u_arg[1]);
1342 sys_rt_sigsuspend(struct tcb *tcp)
1344 if (entering(tcp)) {
1345 /* NB: kernel requires arg[1] == NSIG / 8 */
1346 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1347 tprintf(", %lu", tcp->u_arg[1]);
1353 print_sigqueueinfo(struct tcb *tcp, int sig, unsigned long uinfo)
1357 printsiginfo_at(tcp, uinfo);
1361 sys_rt_sigqueueinfo(struct tcb *tcp)
1363 if (entering(tcp)) {
1364 tprintf("%lu, ", tcp->u_arg[0]);
1365 print_sigqueueinfo(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1371 sys_rt_tgsigqueueinfo(struct tcb *tcp)
1373 if (entering(tcp)) {
1374 tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
1375 print_sigqueueinfo(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1380 int sys_rt_sigtimedwait(struct tcb *tcp)
1382 /* NB: kernel requires arg[3] == NSIG / 8 */
1383 if (entering(tcp)) {
1384 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[3]);
1386 /* This is the only "return" parameter, */
1387 if (tcp->u_arg[1] != 0)
1389 /* ... if it's NULL, can decode all on entry */
1392 else if (tcp->u_arg[1] != 0) {
1393 /* syscall exit, and u_arg[1] wasn't NULL */
1394 printsiginfo_at(tcp, tcp->u_arg[1]);
1398 /* syscall exit, and u_arg[1] was NULL */
1401 print_timespec(tcp, tcp->u_arg[2]);
1402 tprintf(", %lu", tcp->u_arg[3]);
1407 sys_restart_syscall(struct tcb *tcp)
1410 tprints("<... resuming interrupted call ...>");
1415 do_signalfd(struct tcb *tcp, int flags_arg)
1417 /* NB: kernel requires arg[2] == NSIG / 8 */
1418 if (entering(tcp)) {
1419 printfd(tcp, tcp->u_arg[0]);
1421 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1422 tprintf(", %lu", tcp->u_arg[2]);
1423 if (flags_arg >= 0) {
1425 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1432 sys_signalfd(struct tcb *tcp)
1434 return do_signalfd(tcp, -1);
1438 sys_signalfd4(struct tcb *tcp)
1440 return do_signalfd(tcp, 3);