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
95 /* The libc headers do not define this constant since it should only be
96 used by the implementation. So we define it here. */
98 # ifdef ASM_SA_RESTORER
99 # define SA_RESTORER ASM_SA_RESTORER
103 static const struct xlat sigact_flags[] = {
119 #if defined SA_NOMASK && SA_NODEFER != SA_NOMASK
125 #if defined SA_ONESHOT && SA_ONESHOT != SA_RESETHAND
155 static const struct xlat sigprocmaskcmds[] = {
165 #endif /* HAVE_SIGACTION */
167 /* Anonymous realtime signals. */
168 /* Under glibc 2.1, SIGRTMIN et al are functions, but __SIGRTMIN is a
169 constant. This is what we want. Otherwise, just use SIGRTMIN. */
172 #define __SIGRTMIN SIGRTMIN
173 #define __SIGRTMAX SIGRTMAX /* likewise */
177 /* Note on the size of sigset_t:
179 * In glibc, sigset_t is an array with space for 1024 bits (!),
180 * even though all arches supported by Linux have only 64 signals
181 * except MIPS, which has 128. IOW, it is 128 bytes long.
183 * In-kernel sigset_t is sized correctly (it is either 64 or 128 bit long).
184 * However, some old syscall return only 32 lower bits (one word).
185 * Example: sys_sigpending vs sys_rt_sigpending.
187 * Be aware of this fact when you try to
188 * memcpy(&tcp->u_arg[1], &something, sizeof(sigset_t))
189 * - sizeof(sigset_t) is much bigger than you think,
190 * it may overflow tcp->u_arg[] array, and it may try to copy more data
191 * than is really available in <something>.
193 * umoven(tcp, addr, sizeof(sigset_t), &sigset)
194 * may be a bad idea: it'll try to read much more data than needed
195 * to fetch a sigset_t.
196 * Use (NSIG / 8) as a size instead.
202 static char buf[sizeof("SIGRT_%d") + sizeof(int)*3];
204 if (sig >= 0 && sig < nsignals)
205 return signalent[sig];
207 if (sig >= __SIGRTMIN && sig <= __SIGRTMAX) {
208 sprintf(buf, "SIGRT_%d", (int)(sig - __SIGRTMIN));
212 sprintf(buf, "%d", sig);
217 popcount32(const uint32_t *a, unsigned int size)
219 unsigned int count = 0;
221 for (; size; ++a, --size) {
224 #ifdef HAVE___BUILTIN_POPCOUNT
225 count += __builtin_popcount(x);
236 sprintsigmask_n(const char *prefix, const void *sig_mask, unsigned int bytes)
239 * The maximum number of signal names to be printed is NSIG * 2 / 3.
240 * Most of signal names have length 7,
241 * average length of signal names is less than 7.
242 * The length of prefix string does not exceed 16.
244 static char outstr[128 + 8 * (NSIG * 2 / 3)];
247 const uint32_t *mask;
248 uint32_t inverted_mask[NSIG / 32];
253 s = stpcpy(outstr, prefix);
256 /* length of signal mask in 4-byte words */
257 size = (bytes >= NSIG / 8) ? NSIG / 32 : (bytes + 3) / 4;
259 /* check whether 2/3 or more bits are set */
260 if (popcount32(mask, size) >= size * 32 * 2 / 3) {
261 /* show those signals that are NOT in the mask */
263 for (j = 0; j < size; ++j)
264 inverted_mask[j] = ~mask[j];
265 mask = inverted_mask;
270 for (i = 0; (i = next_set_bit(mask, i, size * 32)) >= 0; ) {
274 s = stpcpy(s, signalent[i] + 3);
277 else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
278 s += sprintf(s, "RT_%u", i - __SIGRTMIN);
282 s += sprintf(s, "%u", i);
293 #define tprintsigmask_addr(prefix, mask) \
294 tprints(sprintsigmask_n((prefix), (mask), sizeof(mask)))
296 #define sprintsigmask_val(prefix, mask) \
297 sprintsigmask_n((prefix), &(mask), sizeof(mask))
299 #define tprintsigmask_val(prefix, mask) \
300 tprints(sprintsigmask_n((prefix), &(mask), sizeof(mask)))
305 tprints(signame(nr));
309 print_sigset_addr_len(struct tcb *tcp, long addr, long len)
317 /* Here len is usually equals NSIG / 8 or current_wordsize.
318 * But we code this defensively:
322 tprintf("%#lx", addr);
328 len = (len + 3) & ~3;
330 if (umoven(tcp, addr, len, mask) < 0)
332 tprints(sprintsigmask_n("", mask, len));
336 #define ILL_ILLOPC 1 /* illegal opcode */
337 #define ILL_ILLOPN 2 /* illegal operand */
338 #define ILL_ILLADR 3 /* illegal addressing mode */
339 #define ILL_ILLTRP 4 /* illegal trap */
340 #define ILL_PRVOPC 5 /* privileged opcode */
341 #define ILL_PRVREG 6 /* privileged register */
342 #define ILL_COPROC 7 /* coprocessor error */
343 #define ILL_BADSTK 8 /* internal stack error */
344 #define FPE_INTDIV 1 /* integer divide by zero */
345 #define FPE_INTOVF 2 /* integer overflow */
346 #define FPE_FLTDIV 3 /* floating point divide by zero */
347 #define FPE_FLTOVF 4 /* floating point overflow */
348 #define FPE_FLTUND 5 /* floating point underflow */
349 #define FPE_FLTRES 6 /* floating point inexact result */
350 #define FPE_FLTINV 7 /* floating point invalid operation */
351 #define FPE_FLTSUB 8 /* subscript out of range */
352 #define SEGV_MAPERR 1 /* address not mapped to object */
353 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */
354 #define BUS_ADRALN 1 /* invalid address alignment */
355 #define BUS_ADRERR 2 /* non-existant physical address */
356 #define BUS_OBJERR 3 /* object specific hardware error */
357 #define TRAP_BRKPT 1 /* process breakpoint */
358 #define TRAP_TRACE 2 /* process trace trap */
359 #define CLD_EXITED 1 /* child has exited */
360 #define CLD_KILLED 2 /* child was killed */
361 #define CLD_DUMPED 3 /* child terminated abnormally */
362 #define CLD_TRAPPED 4 /* traced child has trapped */
363 #define CLD_STOPPED 5 /* child has stopped */
364 #define CLD_CONTINUED 6 /* stopped child has continued */
365 #define POLL_IN 1 /* data input available */
366 #define POLL_OUT 2 /* output buffers available */
367 #define POLL_MSG 3 /* input message available */
368 #define POLL_ERR 4 /* i/o error */
369 #define POLL_PRI 5 /* high priority input available */
370 #define POLL_HUP 6 /* device disconnected */
371 #define SI_KERNEL 0x80 /* sent by kernel */
372 #define SI_USER 0 /* sent by kill, sigsend, raise */
373 #define SI_QUEUE -1 /* sent by sigqueue */
374 #define SI_TIMER -2 /* sent by timer expiration */
375 #define SI_MESGQ -3 /* sent by real time mesq state change */
376 #define SI_ASYNCIO -4 /* sent by AIO completion */
377 #define SI_SIGIO -5 /* sent by SIGIO */
378 #define SI_TKILL -6 /* sent by tkill */
379 #define SI_ASYNCNL -60 /* sent by asynch name lookup completion */
383 # define SI_FROMUSER(sip) ((sip)->si_code <= 0)
386 static const struct xlat siginfo_codes[] = {
423 static const struct xlat sigill_codes[] = {
435 static const struct xlat sigfpe_codes[] = {
447 static const struct xlat sigtrap_codes[] = {
453 static const struct xlat sigchld_codes[] = {
463 static const struct xlat sigpoll_codes[] = {
473 static const struct xlat sigprof_codes[] = {
481 static const struct xlat sigemt_codes[] = {
489 static const struct xlat sigsegv_codes[] = {
495 static const struct xlat sigbus_codes[] = {
503 printsigval(siginfo_t *sip, int verbose)
508 tprintf(", si_value={int=%u, ptr=%#lx}",
510 (unsigned long) sip->si_ptr);
514 printsiginfo(siginfo_t *sip, int verbose)
518 if (sip->si_signo == 0) {
522 tprints("{si_signo=");
523 printsignal(sip->si_signo);
524 code = xlookup(siginfo_codes, sip->si_code);
526 switch (sip->si_signo) {
528 code = xlookup(sigtrap_codes, sip->si_code);
531 code = xlookup(sigchld_codes, sip->si_code);
534 code = xlookup(sigpoll_codes, sip->si_code);
537 code = xlookup(sigprof_codes, sip->si_code);
540 code = xlookup(sigill_codes, sip->si_code);
544 code = xlookup(sigemt_codes, sip->si_code);
548 code = xlookup(sigfpe_codes, sip->si_code);
551 code = xlookup(sigsegv_codes, sip->si_code);
554 code = xlookup(sigbus_codes, sip->si_code);
559 tprintf(", si_code=%s", code);
561 tprintf(", si_code=%#x", sip->si_code);
563 if (sip->si_code != SI_NOINFO)
567 if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
568 tprintf(", si_errno=%d", sip->si_errno);
570 tprintf(", si_errno=%s",
571 errnoent[sip->si_errno]);
574 if (SI_FROMUSER(sip)) {
575 switch (sip->si_code) {
578 tprintf(", si_pid=%lu, si_uid=%lu",
579 (unsigned long) sip->si_pid,
580 (unsigned long) sip->si_uid);
585 tprintf(", si_pid=%lu, si_uid=%lu",
586 (unsigned long) sip->si_pid,
587 (unsigned long) sip->si_uid);
592 tprintf(", si_timerid=%#x, si_overrun=%d",
593 sip->si_timerid, sip->si_overrun);
594 printsigval(sip, verbose);
598 tprintf(", si_pid=%lu, si_uid=%lu",
599 (unsigned long) sip->si_pid,
600 (unsigned long) sip->si_uid);
603 printsigval(sip, verbose);
608 #endif /* SI_FROMUSER */
610 switch (sip->si_signo) {
612 tprintf(", si_pid=%ld, si_status=",
614 if (sip->si_code == CLD_EXITED)
615 tprintf("%d", sip->si_status);
617 printsignal(sip->si_status);
621 tprintf(", si_utime=%llu, si_stime=%llu",
622 (unsigned long long) sip->si_utime,
623 (unsigned long long) sip->si_stime);
625 case SIGILL: case SIGFPE:
626 case SIGSEGV: case SIGBUS:
627 tprintf(", si_addr=%#lx",
628 (unsigned long) sip->si_addr);
631 switch (sip->si_code) {
632 case POLL_IN: case POLL_OUT: case POLL_MSG:
633 tprintf(", si_band=%ld",
634 (long) sip->si_band);
639 if (sip->si_pid || sip->si_uid)
640 tprintf(", si_pid=%lu, si_uid=%lu",
641 (unsigned long) sip->si_pid,
642 (unsigned long) sip->si_uid);
645 printsigval(sip, verbose);
654 printsiginfo_at(struct tcb *tcp, long addr)
662 tprintf("%#lx", addr);
665 if (umove(tcp, addr, &si) < 0) {
669 printsiginfo(&si, verbose(tcp));
673 sys_sigsetmask(struct tcb *tcp)
676 tprintsigmask_val("", tcp->u_arg[0]);
678 else if (!syserror(tcp)) {
679 tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval);
680 return RVAL_HEX | RVAL_STR;
685 #ifdef HAVE_SIGACTION
687 struct old_sigaction {
688 /* sa_handler may be a libc #define, need to use other name: */
690 unsigned int sa_flags;
691 void (*__sa_handler)(int);
692 /* Kernel treats sa_mask as an array of longs. */
693 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
695 void (*__sa_handler)(int);
696 unsigned long sa_mask;
697 unsigned long sa_flags;
698 void (*sa_restorer)(void);
702 struct old_sigaction32 {
703 /* sa_handler may be a libc #define, need to use other name: */
704 uint32_t __sa_handler;
707 uint32_t sa_restorer;
711 decode_old_sigaction(struct tcb *tcp, long addr)
713 struct old_sigaction sa;
720 if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) {
721 tprintf("%#lx", addr);
725 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
726 if (current_wordsize != sizeof(sa.__sa_handler) && current_wordsize == 4) {
727 struct old_sigaction32 sa32;
728 r = umove(tcp, addr, &sa32);
730 memset(&sa, 0, sizeof(sa));
731 sa.__sa_handler = (void*)(uintptr_t)sa32.__sa_handler;
732 sa.sa_flags = sa32.sa_flags;
733 sa.sa_restorer = (void*)(uintptr_t)sa32.sa_restorer;
734 sa.sa_mask = sa32.sa_mask;
739 r = umove(tcp, addr, &sa);
746 /* Architectures using function pointers, like
747 * hppa, may need to manipulate the function pointer
748 * to compute the result of a comparison. However,
749 * the __sa_handler function pointer exists only in
750 * the address space of the traced process, and can't
751 * be manipulated by strace. In order to prevent the
752 * compiler from generating code to manipulate
753 * __sa_handler we cast the function pointers to long. */
754 if ((long)sa.__sa_handler == (long)SIG_ERR)
755 tprints("{SIG_ERR, ");
756 else if ((long)sa.__sa_handler == (long)SIG_DFL)
757 tprints("{SIG_DFL, ");
758 else if ((long)sa.__sa_handler == (long)SIG_IGN)
759 tprints("{SIG_IGN, ");
761 tprintf("{%#lx, ", (long) sa.__sa_handler);
763 tprintsigmask_addr("", sa.sa_mask);
765 tprintsigmask_val("", sa.sa_mask);
768 printflags(sigact_flags, sa.sa_flags, "SA_???");
770 if (sa.sa_flags & SA_RESTORER)
771 tprintf(", %p", sa.sa_restorer);
777 sys_sigaction(struct tcb *tcp)
780 printsignal(tcp->u_arg[0]);
782 decode_old_sigaction(tcp, tcp->u_arg[1]);
785 decode_old_sigaction(tcp, tcp->u_arg[2]);
790 sys_signal(struct tcb *tcp)
793 printsignal(tcp->u_arg[0]);
795 switch (tcp->u_arg[1]) {
806 tprintf("%#lx", tcp->u_arg[1]);
810 else if (!syserror(tcp)) {
811 switch (tcp->u_rval) {
813 tcp->auxstr = "SIG_ERR"; break;
815 tcp->auxstr = "SIG_DFL"; break;
817 tcp->auxstr = "SIG_IGN"; break;
821 return RVAL_HEX | RVAL_STR;
826 #endif /* HAVE_SIGACTION */
829 sys_sigreturn(struct tcb *tcp)
833 struct arm_sigcontext {
834 unsigned long trap_no;
835 unsigned long error_code;
836 unsigned long oldmask;
837 unsigned long arm_r0;
838 unsigned long arm_r1;
839 unsigned long arm_r2;
840 unsigned long arm_r3;
841 unsigned long arm_r4;
842 unsigned long arm_r5;
843 unsigned long arm_r6;
844 unsigned long arm_r7;
845 unsigned long arm_r8;
846 unsigned long arm_r9;
847 unsigned long arm_r10;
848 unsigned long arm_fp;
849 unsigned long arm_ip;
850 unsigned long arm_sp;
851 unsigned long arm_lr;
852 unsigned long arm_pc;
853 unsigned long arm_cpsr;
854 unsigned long fault_address;
856 struct arm_ucontext {
857 unsigned long uc_flags;
858 unsigned long uc_link; /* struct ucontext* */
859 /* The next three members comprise stack_t struct: */
860 unsigned long ss_sp; /* void* */
861 unsigned long ss_flags; /* int */
862 unsigned long ss_size; /* size_t */
863 struct arm_sigcontext sc;
864 /* These two members are sigset_t: */
865 unsigned long uc_sigmask[2];
866 /* more fields follow, which we aren't interested in */
868 struct arm_ucontext uc;
869 if (umove(tcp, arm_regs.ARM_sp, &uc) < 0)
872 * Kernel fills out uc.sc.oldmask too when it sets up signal stack,
873 * but for sigmask restore, sigreturn syscall uses uc.uc_sigmask instead.
875 tprintsigmask_addr(") (mask ", uc.uc_sigmask);
877 #elif defined(S390) || defined(S390X)
880 struct sigcontext sc;
881 if (upeek(tcp->pid, PT_GPR15, &usp) < 0)
883 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
885 tprintsigmask_addr(") (mask ", sc.oldmask);
887 #elif defined(I386) || defined(X86_64)
889 if (current_personality == 0) /* 64-bit */
893 struct i386_sigcontext_struct {
911 uint32_t esp_at_signal;
917 struct i386_fpstate {
925 uint8_t st[8][10]; /* 8*10 bytes: FP regs */
928 uint32_t fxsr_env[6];
931 uint8_t stx[8][16]; /* 8*16 bytes: FP regs, each padded to 16 bytes */
932 uint8_t xmm[8][16]; /* 8 XMM regs */
933 uint32_t padding1[44];
934 uint32_t padding2[12]; /* union with struct _fpx_sw_bytes */
937 struct i386_sigcontext_struct sc;
938 struct i386_fpstate fp;
939 uint32_t extramask[1];
941 /* On i386, sc is followed on stack by struct fpstate
942 * and after it an additional u32 extramask[1] which holds
943 * upper half of the mask.
946 if (umove(tcp, *i386_esp_ptr, &signal_stack) < 0)
948 sigmask[0] = signal_stack.sc.oldmask;
949 sigmask[1] = signal_stack.extramask[0];
950 tprintsigmask_addr(") (mask ", sigmask);
954 struct sigcontext sc;
956 /* offset of sigcontext in the kernel's sigframe structure: */
957 # define SIGFRAME_SC_OFFSET 0x90
958 if (upeek(tcp->pid, PT_R12, &sp) < 0)
960 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
962 tprintsigmask_val(") (mask ", sc.sc_mask);
964 #elif defined(POWERPC)
967 struct sigcontext sc;
969 esp = ppc_regs.gpr[1];
971 /* Skip dummy stack frame. */
973 if (current_personality == 0)
980 if (umove(tcp, esp, &sc) < 0)
982 tprintsigmask_val(") (mask ", sc.oldmask);
987 struct sigcontext sc;
988 if (upeek(tcp->pid, 4*PT_USP, &usp) < 0)
990 if (umove(tcp, usp, &sc) < 0)
992 tprintsigmask_val(") (mask ", sc.sc_mask);
997 struct sigcontext sc;
998 if (upeek(tcp->pid, REG_FP, &fp) < 0)
1000 if (umove(tcp, fp, &sc) < 0)
1002 tprintsigmask_val(") (mask ", sc.sc_mask);
1004 #elif defined(SPARC) || defined(SPARC64)
1005 if (entering(tcp)) {
1008 i1 = sparc_regs.u_regs[U_REG_O1];
1009 if (umove(tcp, i1, &si) < 0) {
1010 perror_msg("sigreturn: umove");
1013 tprintsigmask_val(") (mask ", si.si_mask);
1015 #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
1016 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
1018 if (entering(tcp)) {
1021 if (upeek(tcp->pid, REG_SP, &sp) < 0)
1023 /* There are six words followed by a 128-byte siginfo. */
1024 sp = sp + 6 * 4 + 128;
1025 if (umove(tcp, sp, &uc) < 0)
1027 tprintsigmask_val(") (mask ", uc.uc_sigmask);
1030 if (entering(tcp)) {
1032 struct pt_regs regs;
1034 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1035 perror_msg("sigreturn: PTRACE_GETREGS");
1039 if (umove(tcp, sp, &si) < 0)
1041 tprintsigmask_val(") (mask ", si.si_mask);
1043 #elif defined(CRISV10) || defined(CRISV32)
1044 if (entering(tcp)) {
1045 struct sigcontext sc;
1046 long regs[PT_MAX+1];
1047 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
1048 perror_msg("sigreturn: PTRACE_GETREGS");
1051 if (umove(tcp, regs[PT_USP], &sc) < 0)
1053 tprintsigmask_val(") (mask ", sc.oldmask);
1056 if (entering(tcp)) {
1059 /* offset of ucontext in the kernel's sigframe structure */
1060 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(siginfo_t)
1061 if (umove(tcp, tile_regs.sp + SIGFRAME_UC_OFFSET, &uc) < 0)
1063 tprintsigmask_val(") (mask ", uc.uc_sigmask);
1065 #elif defined(MICROBLAZE)
1066 /* TODO: Verify that this is correct... */
1067 if (entering(tcp)) {
1068 struct sigcontext sc;
1070 /* Read r1, the stack pointer. */
1071 if (upeek(tcp->pid, 1 * 4, &sp) < 0)
1073 if (umove(tcp, sp, &sc) < 0)
1075 tprintsigmask_val(") (mask ", sc.oldmask);
1077 #elif defined(XTENSA)
1078 /* Xtensa only has rt_sys_sigreturn */
1080 /* ARC syscall ABI only supports rt_sys_sigreturn */
1082 # warning No sys_sigreturn() for this architecture
1083 # warning (no problem, just a reminder :-)
1089 sys_siggetmask(struct tcb *tcp)
1092 tcp->auxstr = sprintsigmask_val("mask ", tcp->u_rval);
1094 return RVAL_HEX | RVAL_STR;
1098 sys_sigsuspend(struct tcb *tcp)
1100 if (entering(tcp)) {
1101 tprintsigmask_val("", tcp->u_arg[2]);
1106 #if !defined SS_ONSTACK
1107 #define SS_ONSTACK 1
1108 #define SS_DISABLE 2
1111 static const struct xlat sigaltstack_flags[] = {
1118 print_stack_t(struct tcb *tcp, unsigned long addr)
1128 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
1129 if (current_wordsize != sizeof(ss.ss_sp) && current_wordsize == 4) {
1135 r = umove(tcp, addr, &ss32);
1137 memset(&ss, 0, sizeof(ss));
1138 ss.ss_sp = (void*)(unsigned long) ss32.ss_sp;
1139 ss.ss_flags = ss32.ss_flags;
1140 ss.ss_size = (unsigned long) ss32.ss_size;
1145 r = umove(tcp, addr, &ss);
1148 tprintf("%#lx", addr);
1150 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1151 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1152 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1157 sys_sigaltstack(struct tcb *tcp)
1159 if (entering(tcp)) {
1160 print_stack_t(tcp, tcp->u_arg[0]);
1164 print_stack_t(tcp, tcp->u_arg[1]);
1169 #ifdef HAVE_SIGACTION
1171 /* "Old" sigprocmask, which operates with word-sized signal masks */
1173 sys_sigprocmask(struct tcb *tcp)
1176 if (entering(tcp)) {
1178 * Alpha/OSF is different: it doesn't pass in two pointers,
1179 * but rather passes in the new bitmask as an argument and
1180 * then returns the old bitmask. This "works" because we
1181 * only have 64 signals to worry about. If you want more,
1182 * use of the rt_sigprocmask syscall is required.
1184 * old = osf_sigprocmask(how, new);
1186 * ret = sigprocmask(how, &new, &old, ...);
1188 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1189 tprintsigmask_val(", ", tcp->u_arg[1]);
1191 else if (!syserror(tcp)) {
1192 tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval);
1193 return RVAL_HEX | RVAL_STR;
1196 if (entering(tcp)) {
1197 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1199 print_sigset_addr_len(tcp, tcp->u_arg[1], current_wordsize);
1204 tprintf("%#lx", tcp->u_arg[2]);
1206 print_sigset_addr_len(tcp, tcp->u_arg[2], current_wordsize);
1208 # endif /* !ALPHA */
1212 #endif /* HAVE_SIGACTION */
1215 sys_kill(struct tcb *tcp)
1217 if (entering(tcp)) {
1219 widen_to_long(tcp->u_arg[0]),
1220 signame(tcp->u_arg[1])
1227 sys_tgkill(struct tcb *tcp)
1229 if (entering(tcp)) {
1230 tprintf("%ld, %ld, %s",
1231 widen_to_long(tcp->u_arg[0]),
1232 widen_to_long(tcp->u_arg[1]),
1233 signame(tcp->u_arg[2])
1240 sys_sigpending(struct tcb *tcp)
1244 tprintf("%#lx", tcp->u_arg[0]);
1246 print_sigset_addr_len(tcp, tcp->u_arg[0], current_wordsize);
1252 sys_rt_sigprocmask(struct tcb *tcp)
1254 /* Note: arg[3] is the length of the sigset. Kernel requires NSIG / 8 */
1255 if (entering(tcp)) {
1256 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1258 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[3]);
1263 tprintf("%#lx", tcp->u_arg[2]);
1265 print_sigset_addr_len(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1266 tprintf(", %lu", tcp->u_arg[3]);
1271 /* Structure describing the action to be taken when a signal arrives. */
1272 struct new_sigaction
1274 /* sa_handler may be a libc #define, need to use other name: */
1276 unsigned int sa_flags;
1277 void (*__sa_handler)(int);
1279 void (*__sa_handler)(int);
1280 unsigned long sa_flags;
1281 void (*sa_restorer)(void);
1283 /* Kernel treats sa_mask as an array of longs. */
1284 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1286 /* Same for i386-on-x86_64 and similar cases */
1287 struct new_sigaction32
1289 uint32_t __sa_handler;
1291 uint32_t sa_restorer;
1292 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1296 decode_new_sigaction(struct tcb *tcp, long addr)
1298 struct new_sigaction sa;
1305 if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) {
1306 tprintf("%#lx", addr);
1309 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
1310 if (current_wordsize != sizeof(sa.sa_flags) && current_wordsize == 4) {
1311 struct new_sigaction32 sa32;
1312 r = umove(tcp, addr, &sa32);
1314 memset(&sa, 0, sizeof(sa));
1315 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1316 sa.sa_flags = sa32.sa_flags;
1317 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1318 /* Kernel treats sa_mask as an array of longs.
1319 * For 32-bit process, "long" is uint32_t, thus, for example,
1320 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1321 * But for (64-bit) kernel, 32th bit in sa_mask is
1322 * 32th bit in 0th (64-bit) long!
1323 * For little-endian, it's the same.
1324 * For big-endian, we swap 32-bit words.
1326 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1331 r = umove(tcp, addr, &sa);
1337 /* Architectures using function pointers, like
1338 * hppa, may need to manipulate the function pointer
1339 * to compute the result of a comparison. However,
1340 * the __sa_handler function pointer exists only in
1341 * the address space of the traced process, and can't
1342 * be manipulated by strace. In order to prevent the
1343 * compiler from generating code to manipulate
1344 * __sa_handler we cast the function pointers to long. */
1345 if ((long)sa.__sa_handler == (long)SIG_ERR)
1346 tprints("{SIG_ERR, ");
1347 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1348 tprints("{SIG_DFL, ");
1349 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1350 tprints("{SIG_IGN, ");
1352 tprintf("{%#lx, ", (long) sa.__sa_handler);
1354 * Sigset size is in tcp->u_arg[4] (SPARC)
1355 * or in tcp->u_arg[3] (all other),
1356 * but kernel won't handle sys_rt_sigaction
1357 * with wrong sigset size (just returns EINVAL instead).
1358 * We just fetch the right size, which is NSIG / 8.
1360 tprintsigmask_val("", sa.sa_mask);
1363 printflags(sigact_flags, sa.sa_flags, "SA_???");
1365 if (sa.sa_flags & SA_RESTORER)
1366 tprintf(", %p", sa.sa_restorer);
1372 sys_rt_sigaction(struct tcb *tcp)
1374 if (entering(tcp)) {
1375 printsignal(tcp->u_arg[0]);
1377 decode_new_sigaction(tcp, tcp->u_arg[1]);
1380 decode_new_sigaction(tcp, tcp->u_arg[2]);
1381 #if defined(SPARC) || defined(SPARC64)
1382 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1383 #elif defined(ALPHA)
1384 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1386 tprintf(", %lu", tcp->u_arg[3]);
1393 sys_rt_sigpending(struct tcb *tcp)
1397 * One of the few syscalls where sigset size (arg[1])
1398 * is allowed to be <= NSIG / 8, not strictly ==.
1399 * This allows non-rt sigpending() syscall
1400 * to reuse rt_sigpending() code in kernel.
1403 tprintf("%#lx", tcp->u_arg[0]);
1405 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1406 tprintf(", %lu", tcp->u_arg[1]);
1412 sys_rt_sigsuspend(struct tcb *tcp)
1414 if (entering(tcp)) {
1415 /* NB: kernel requires arg[1] == NSIG / 8 */
1416 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1417 tprintf(", %lu", tcp->u_arg[1]);
1423 print_sigqueueinfo(struct tcb *tcp, int sig, unsigned long uinfo)
1427 printsiginfo_at(tcp, uinfo);
1431 sys_rt_sigqueueinfo(struct tcb *tcp)
1433 if (entering(tcp)) {
1434 tprintf("%lu, ", tcp->u_arg[0]);
1435 print_sigqueueinfo(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1441 sys_rt_tgsigqueueinfo(struct tcb *tcp)
1443 if (entering(tcp)) {
1444 tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
1445 print_sigqueueinfo(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1450 int sys_rt_sigtimedwait(struct tcb *tcp)
1452 /* NB: kernel requires arg[3] == NSIG / 8 */
1453 if (entering(tcp)) {
1454 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[3]);
1456 /* This is the only "return" parameter, */
1457 if (tcp->u_arg[1] != 0)
1459 /* ... if it's NULL, can decode all on entry */
1462 else if (tcp->u_arg[1] != 0) {
1463 /* syscall exit, and u_arg[1] wasn't NULL */
1464 printsiginfo_at(tcp, tcp->u_arg[1]);
1468 /* syscall exit, and u_arg[1] was NULL */
1471 print_timespec(tcp, tcp->u_arg[2]);
1472 tprintf(", %lu", tcp->u_arg[3]);
1477 sys_restart_syscall(struct tcb *tcp)
1480 tprints("<... resuming interrupted call ...>");
1485 do_signalfd(struct tcb *tcp, int flags_arg)
1487 /* NB: kernel requires arg[2] == NSIG / 8 */
1488 if (entering(tcp)) {
1489 printfd(tcp, tcp->u_arg[0]);
1491 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1492 tprintf(", %lu", tcp->u_arg[2]);
1493 if (flags_arg >= 0) {
1495 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1502 sys_signalfd(struct tcb *tcp)
1504 return do_signalfd(tcp, -1);
1508 sys_signalfd4(struct tcb *tcp)
1510 return do_signalfd(tcp, 3);