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[] = {
117 #if defined SA_NOMASK && SA_NODEFER != SA_NOMASK
123 #if defined SA_ONESHOT && SA_ONESHOT != SA_RESETHAND
153 static const struct xlat sigprocmaskcmds[] = {
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[] = {
414 static const struct xlat sigill_codes[] = {
426 static const struct xlat sigfpe_codes[] = {
438 static const struct xlat sigtrap_codes[] = {
444 static const struct xlat sigchld_codes[] = {
454 static const struct xlat sigpoll_codes[] = {
464 static const struct xlat sigprof_codes[] = {
472 static const struct xlat sigemt_codes[] = {
480 static const struct xlat sigsegv_codes[] = {
486 static const struct xlat sigbus_codes[] = {
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: */
673 unsigned int sa_flags;
674 void (*__sa_handler)(int);
675 /* Kernel treats sa_mask as an array of longs. */
676 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
678 void (*__sa_handler)(int);
679 unsigned long sa_mask;
680 unsigned long sa_flags;
681 void (*sa_restorer)(void);
686 decode_old_sigaction(struct tcb *tcp, long addr)
688 struct old_sigaction sa;
694 if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) {
695 tprintf("%#lx", addr);
698 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);
720 tprints(sprintsigmask("", (sigset_t *)sa.sa_mask));
722 tprints(sprintsigmask_long("", sa.sa_mask));
725 printflags(sigact_flags, sa.sa_flags, "SA_???");
727 if (sa.sa_flags & SA_RESTORER)
728 tprintf(", %p", sa.sa_restorer);
734 sys_sigaction(struct tcb *tcp)
737 printsignal(tcp->u_arg[0]);
739 decode_old_sigaction(tcp, tcp->u_arg[1]);
742 decode_old_sigaction(tcp, tcp->u_arg[2]);
747 sys_signal(struct tcb *tcp)
750 printsignal(tcp->u_arg[0]);
752 switch (tcp->u_arg[1]) {
763 tprintf("%#lx", tcp->u_arg[1]);
767 else if (!syserror(tcp)) {
768 switch (tcp->u_rval) {
770 tcp->auxstr = "SIG_ERR"; break;
772 tcp->auxstr = "SIG_DFL"; break;
774 tcp->auxstr = "SIG_IGN"; break;
778 return RVAL_HEX | RVAL_STR;
783 #endif /* HAVE_SIGACTION */
786 sys_sigreturn(struct tcb *tcp)
790 struct arm_sigcontext {
791 unsigned long trap_no;
792 unsigned long error_code;
793 unsigned long oldmask;
794 unsigned long arm_r0;
795 unsigned long arm_r1;
796 unsigned long arm_r2;
797 unsigned long arm_r3;
798 unsigned long arm_r4;
799 unsigned long arm_r5;
800 unsigned long arm_r6;
801 unsigned long arm_r7;
802 unsigned long arm_r8;
803 unsigned long arm_r9;
804 unsigned long arm_r10;
805 unsigned long arm_fp;
806 unsigned long arm_ip;
807 unsigned long arm_sp;
808 unsigned long arm_lr;
809 unsigned long arm_pc;
810 unsigned long arm_cpsr;
811 unsigned long fault_address;
813 struct arm_ucontext {
814 unsigned long uc_flags;
815 unsigned long uc_link; /* struct ucontext* */
816 /* The next three members comprise stack_t struct: */
817 unsigned long ss_sp; /* void* */
818 unsigned long ss_flags; /* int */
819 unsigned long ss_size; /* size_t */
820 struct arm_sigcontext sc;
821 /* These two members are sigset_t: */
822 unsigned long uc_sigmask[2];
823 /* more fields follow, which we aren't interested in */
825 struct arm_ucontext uc;
827 if (umove(tcp, arm_regs.ARM_sp, &uc) < 0)
829 /* Kernel fills out uc.sc.oldmask too when it sets up signal stack,
830 * but for sigmask restore, sigreturn syscall uses uc.uc_sigmask instead.
831 * tprints(sprintsigmask_long(") (mask ", uc.sc.oldmask));
834 ((uint32_t*)&sigm)[0] = uc.uc_sigmask[0];
835 ((uint32_t*)&sigm)[1] = uc.uc_sigmask[1];
836 tprints(sprintsigmask(") (mask ", &sigm));
838 #elif defined(S390) || defined(S390X)
841 struct sigcontext sc;
842 if (upeek(tcp->pid, PT_GPR15, &usp) < 0)
844 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
846 tprints(sprintsigmask(") (mask ", (sigset_t *)&sc.oldmask[0]));
848 #elif defined(I386) || defined(X86_64)
850 if (current_personality == 0) /* 64-bit */
854 struct i386_sigcontext_struct {
872 uint32_t esp_at_signal;
878 struct i386_fpstate {
886 uint8_t st[8][10]; /* 8*10 bytes: FP regs */
889 uint32_t fxsr_env[6];
892 uint8_t stx[8][16]; /* 8*16 bytes: FP regs, each padded to 16 bytes */
893 uint8_t xmm[8][16]; /* 8 XMM regs */
894 uint32_t padding1[44];
895 uint32_t padding2[12]; /* union with struct _fpx_sw_bytes */
898 struct i386_sigcontext_struct sc;
899 struct i386_fpstate fp;
900 uint32_t extramask[1];
902 /* On i386, sc is followed on stack by struct fpstate
903 * and after it an additional u32 extramask[1] which holds
904 * upper half of the mask.
910 if (umove(tcp, *i386_esp_ptr, &signal_stack) < 0)
912 sigemptyset(&sigmask.sig);
913 sigmask.mask[0] = signal_stack.sc.oldmask;
914 sigmask.mask[1] = signal_stack.extramask[0];
915 tprints(sprintsigmask(") (mask ", &sigmask.sig));
919 struct sigcontext sc;
922 /* offset of sigcontext in the kernel's sigframe structure: */
923 # define SIGFRAME_SC_OFFSET 0x90
924 if (upeek(tcp->pid, PT_R12, &sp) < 0)
926 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
929 memcpy(&sigm, &sc.sc_mask, NSIG / 8);
930 tprints(sprintsigmask(") (mask ", &sigm));
932 #elif defined(POWERPC)
935 struct sigcontext sc;
937 esp = ppc_regs.gpr[1];
939 /* Skip dummy stack frame. */
941 if (current_personality == 0)
948 if (umove(tcp, esp, &sc) < 0)
950 tprints(sprintsigmask_long(") (mask ", sc.oldmask));
955 struct sigcontext sc;
956 if (upeek(tcp->pid, 4*PT_USP, &usp) < 0)
958 if (umove(tcp, usp, &sc) < 0)
960 tprints(sprintsigmask_long(") (mask ", sc.sc_mask));
965 struct sigcontext sc;
966 if (upeek(tcp->pid, REG_FP, &fp) < 0)
968 if (umove(tcp, fp, &sc) < 0)
970 tprints(sprintsigmask_long(") (mask ", sc.sc_mask));
972 #elif defined(SPARC) || defined(SPARC64)
976 i1 = sparc_regs.u_regs[U_REG_O1];
977 if (umove(tcp, i1, &si) < 0) {
978 perror_msg("sigreturn: umove");
981 tprints(sprintsigmask_long(") (mask ", si.si_mask));
983 #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
984 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
990 if (upeek(tcp->pid, REG_SP, &sp) < 0)
992 /* There are six words followed by a 128-byte siginfo. */
993 sp = sp + 6 * 4 + 128;
994 if (umove(tcp, sp, &uc) < 0)
996 tprints(sprintsigmask_long(") (mask ", *(long *) &uc.uc_sigmask));
1001 struct pt_regs regs;
1003 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1004 perror_msg("sigreturn: PTRACE_GETREGS");
1008 if (umove(tcp, sp, &si) < 0)
1010 tprints(sprintsigmask_long(") (mask ", si.si_mask));
1012 #elif defined(CRISV10) || defined(CRISV32)
1013 if (entering(tcp)) {
1014 struct sigcontext sc;
1015 long regs[PT_MAX+1];
1016 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
1017 perror_msg("sigreturn: PTRACE_GETREGS");
1020 if (umove(tcp, regs[PT_USP], &sc) < 0)
1022 tprints(sprintsigmask_long(") (mask ", sc.oldmask));
1025 if (entering(tcp)) {
1029 /* offset of ucontext in the kernel's sigframe structure */
1030 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(siginfo_t)
1031 if (umove(tcp, tile_regs.sp + SIGFRAME_UC_OFFSET, &uc) < 0)
1034 memcpy(&sigm, &uc.uc_sigmask, NSIG / 8);
1035 tprints(sprintsigmask(") (mask ", &sigm));
1037 #elif defined(MICROBLAZE)
1038 /* TODO: Verify that this is correct... */
1039 if (entering(tcp)) {
1040 struct sigcontext sc;
1042 /* Read r1, the stack pointer. */
1043 if (upeek(tcp->pid, 1 * 4, &sp) < 0)
1045 if (umove(tcp, sp, &sc) < 0)
1047 tprints(sprintsigmask_long(") (mask ", sc.oldmask));
1049 #elif defined(XTENSA)
1050 /* Xtensa only has rt_sys_sigreturn */
1052 /* ARC syscall ABI only supports rt_sys_sigreturn */
1054 # warning No sys_sigreturn() for this architecture
1055 # warning (no problem, just a reminder :-)
1061 sys_siggetmask(struct tcb *tcp)
1064 tcp->auxstr = sprintsigmask_long("mask ", tcp->u_rval);
1066 return RVAL_HEX | RVAL_STR;
1070 sys_sigsuspend(struct tcb *tcp)
1072 if (entering(tcp)) {
1073 tprints(sprintsigmask_long("", tcp->u_arg[2]));
1078 #if !defined SS_ONSTACK
1079 #define SS_ONSTACK 1
1080 #define SS_DISABLE 2
1083 static const struct xlat sigaltstack_flags[] = {
1090 print_stack_t(struct tcb *tcp, unsigned long addr)
1096 } else if (umove(tcp, addr, &ss) < 0) {
1097 tprintf("%#lx", addr);
1099 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1100 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1101 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1106 sys_sigaltstack(struct tcb *tcp)
1108 if (entering(tcp)) {
1109 print_stack_t(tcp, tcp->u_arg[0]);
1113 print_stack_t(tcp, tcp->u_arg[1]);
1118 #ifdef HAVE_SIGACTION
1120 /* "Old" sigprocmask, which operates with word-sized signal masks */
1122 sys_sigprocmask(struct tcb *tcp)
1125 if (entering(tcp)) {
1127 * Alpha/OSF is different: it doesn't pass in two pointers,
1128 * but rather passes in the new bitmask as an argument and
1129 * then returns the old bitmask. This "works" because we
1130 * only have 64 signals to worry about. If you want more,
1131 * use of the rt_sigprocmask syscall is required.
1133 * old = osf_sigprocmask(how, new);
1135 * ret = sigprocmask(how, &new, &old, ...);
1137 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1138 tprints(sprintsigmask_long(", ", tcp->u_arg[1]));
1140 else if (!syserror(tcp)) {
1141 tcp->auxstr = sprintsigmask_long("old mask ", tcp->u_rval);
1142 return RVAL_HEX | RVAL_STR;
1145 if (entering(tcp)) {
1146 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1148 print_sigset_addr_len(tcp, tcp->u_arg[1], current_wordsize);
1153 tprintf("%#lx", tcp->u_arg[2]);
1155 print_sigset_addr_len(tcp, tcp->u_arg[2], current_wordsize);
1157 # endif /* !ALPHA */
1161 #endif /* HAVE_SIGACTION */
1164 sys_kill(struct tcb *tcp)
1166 if (entering(tcp)) {
1168 widen_to_long(tcp->u_arg[0]),
1169 signame(tcp->u_arg[1])
1176 sys_tgkill(struct tcb *tcp)
1178 if (entering(tcp)) {
1179 tprintf("%ld, %ld, %s",
1180 widen_to_long(tcp->u_arg[0]),
1181 widen_to_long(tcp->u_arg[1]),
1182 signame(tcp->u_arg[2])
1189 sys_sigpending(struct tcb *tcp)
1193 tprintf("%#lx", tcp->u_arg[0]);
1195 print_sigset_addr_len(tcp, tcp->u_arg[0], current_wordsize);
1201 sys_rt_sigprocmask(struct tcb *tcp)
1203 /* Note: arg[3] is the length of the sigset. Kernel requires NSIG / 8 */
1204 if (entering(tcp)) {
1205 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1207 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[3]);
1212 tprintf("%#lx", tcp->u_arg[2]);
1214 print_sigset_addr_len(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1215 tprintf(", %lu", tcp->u_arg[3]);
1220 /* Structure describing the action to be taken when a signal arrives. */
1221 struct new_sigaction
1223 /* sa_handler may be a libc #define, need to use other name: */
1225 unsigned int sa_flags;
1226 void (*__sa_handler)(int);
1228 void (*__sa_handler)(int);
1229 unsigned long sa_flags;
1230 void (*sa_restorer)(void);
1232 /* Kernel treats sa_mask as an array of longs. */
1233 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1235 /* Same for i386-on-x86_64 and similar cases */
1236 struct new_sigaction32
1238 uint32_t __sa_handler;
1240 uint32_t sa_restorer;
1241 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1245 decode_new_sigaction(struct tcb *tcp, long addr)
1247 struct new_sigaction sa;
1255 if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) {
1256 tprintf("%#lx", addr);
1259 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
1260 if (current_wordsize != sizeof(sa.sa_flags) && current_wordsize == 4) {
1261 struct new_sigaction32 sa32;
1262 r = umove(tcp, addr, &sa32);
1264 memset(&sa, 0, sizeof(sa));
1265 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1266 sa.sa_flags = sa32.sa_flags;
1267 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1268 /* Kernel treats sa_mask as an array of longs.
1269 * For 32-bit process, "long" is uint32_t, thus, for example,
1270 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1271 * But for (64-bit) kernel, 32th bit in sa_mask is
1272 * 32th bit in 0th (64-bit) long!
1273 * For little-endian, it's the same.
1274 * For big-endian, we swap 32-bit words.
1276 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1281 r = umove(tcp, addr, &sa);
1287 /* Architectures using function pointers, like
1288 * hppa, may need to manipulate the function pointer
1289 * to compute the result of a comparison. However,
1290 * the __sa_handler function pointer exists only in
1291 * the address space of the traced process, and can't
1292 * be manipulated by strace. In order to prevent the
1293 * compiler from generating code to manipulate
1294 * __sa_handler we cast the function pointers to long. */
1295 if ((long)sa.__sa_handler == (long)SIG_ERR)
1296 tprints("{SIG_ERR, ");
1297 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1298 tprints("{SIG_DFL, ");
1299 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1300 tprints("{SIG_IGN, ");
1302 tprintf("{%#lx, ", (long) sa.__sa_handler);
1304 * Sigset size is in tcp->u_arg[4] (SPARC)
1305 * or in tcp->u_arg[3] (all other),
1306 * but kernel won't handle sys_rt_sigaction
1307 * with wrong sigset size (just returns EINVAL instead).
1308 * We just fetch the right size, which is NSIG / 8.
1310 sigemptyset(&sigset);
1311 memcpy(&sigset, &sa.sa_mask, NSIG / 8);
1312 printsigmask(&sigset);
1315 printflags(sigact_flags, sa.sa_flags, "SA_???");
1317 if (sa.sa_flags & SA_RESTORER)
1318 tprintf(", %p", sa.sa_restorer);
1324 sys_rt_sigaction(struct tcb *tcp)
1326 if (entering(tcp)) {
1327 printsignal(tcp->u_arg[0]);
1329 decode_new_sigaction(tcp, tcp->u_arg[1]);
1332 decode_new_sigaction(tcp, tcp->u_arg[2]);
1333 #if defined(SPARC) || defined(SPARC64)
1334 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1335 #elif defined(ALPHA)
1336 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1338 tprintf(", %lu", tcp->u_arg[3]);
1345 sys_rt_sigpending(struct tcb *tcp)
1349 * One of the few syscalls where sigset size (arg[1])
1350 * is allowed to be <= NSIG / 8, not strictly ==.
1351 * This allows non-rt sigpending() syscall
1352 * to reuse rt_sigpending() code in kernel.
1355 tprintf("%#lx", tcp->u_arg[0]);
1357 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1358 tprintf(", %lu", tcp->u_arg[1]);
1364 sys_rt_sigsuspend(struct tcb *tcp)
1366 if (entering(tcp)) {
1367 /* NB: kernel requires arg[1] == NSIG / 8 */
1368 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1369 tprintf(", %lu", tcp->u_arg[1]);
1375 print_sigqueueinfo(struct tcb *tcp, int sig, unsigned long uinfo)
1379 printsiginfo_at(tcp, uinfo);
1383 sys_rt_sigqueueinfo(struct tcb *tcp)
1385 if (entering(tcp)) {
1386 tprintf("%lu, ", tcp->u_arg[0]);
1387 print_sigqueueinfo(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1393 sys_rt_tgsigqueueinfo(struct tcb *tcp)
1395 if (entering(tcp)) {
1396 tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
1397 print_sigqueueinfo(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1402 int sys_rt_sigtimedwait(struct tcb *tcp)
1404 /* NB: kernel requires arg[3] == NSIG / 8 */
1405 if (entering(tcp)) {
1406 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[3]);
1408 /* This is the only "return" parameter, */
1409 if (tcp->u_arg[1] != 0)
1411 /* ... if it's NULL, can decode all on entry */
1414 else if (tcp->u_arg[1] != 0) {
1415 /* syscall exit, and u_arg[1] wasn't NULL */
1416 printsiginfo_at(tcp, tcp->u_arg[1]);
1420 /* syscall exit, and u_arg[1] was NULL */
1423 print_timespec(tcp, tcp->u_arg[2]);
1424 tprintf(", %lu", tcp->u_arg[3]);
1429 sys_restart_syscall(struct tcb *tcp)
1432 tprints("<... resuming interrupted call ...>");
1437 do_signalfd(struct tcb *tcp, int flags_arg)
1439 /* NB: kernel requires arg[2] == NSIG / 8 */
1440 if (entering(tcp)) {
1441 printfd(tcp, tcp->u_arg[0]);
1443 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1444 tprintf(", %lu", tcp->u_arg[2]);
1445 if (flags_arg >= 0) {
1447 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1454 sys_signalfd(struct tcb *tcp)
1456 return do_signalfd(tcp, -1);
1460 sys_signalfd4(struct tcb *tcp)
1462 return do_signalfd(tcp, 3);