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 #if defined(SPARC) || defined(SPARC64) || defined(MIPS)
42 struct pt_regs si_regs;
45 #elif defined HAVE_ASM_SIGCONTEXT_H
46 # if !defined(IA64) && !defined(X86_64) && !defined(X32)
47 # include <asm/sigcontext.h>
49 #else /* !HAVE_ASM_SIGCONTEXT_H */
50 # if defined M68K && !defined HAVE_STRUCT_SIGCONTEXT
52 unsigned long sc_mask;
60 unsigned short sc_formatvec;
63 #endif /* !HAVE_ASM_SIGCONTEXT_H */
66 # warning: NSIG is not defined, using 32
74 /* The libc headers do not define this constant since it should only be
75 used by the implementation. So we define it here. */
77 # ifdef ASM_SA_RESTORER
78 # define SA_RESTORER ASM_SA_RESTORER
82 /* Some arches define this in their headers, but don't actually have it,
83 so we have to delete the define. */
84 #if defined(HPPA) || defined(IA64)
88 #include "xlat/sigact_flags.h"
89 #include "xlat/sigprocmaskcmds.h"
91 #endif /* HAVE_SIGACTION */
93 /* Anonymous realtime signals. */
94 /* Under glibc 2.1, SIGRTMIN et al are functions, but __SIGRTMIN is a
95 constant. This is what we want. Otherwise, just use SIGRTMIN. */
98 #define __SIGRTMIN SIGRTMIN
99 #define __SIGRTMAX SIGRTMAX /* likewise */
103 /* Note on the size of sigset_t:
105 * In glibc, sigset_t is an array with space for 1024 bits (!),
106 * even though all arches supported by Linux have only 64 signals
107 * except MIPS, which has 128. IOW, it is 128 bytes long.
109 * In-kernel sigset_t is sized correctly (it is either 64 or 128 bit long).
110 * However, some old syscall return only 32 lower bits (one word).
111 * Example: sys_sigpending vs sys_rt_sigpending.
113 * Be aware of this fact when you try to
114 * memcpy(&tcp->u_arg[1], &something, sizeof(sigset_t))
115 * - sizeof(sigset_t) is much bigger than you think,
116 * it may overflow tcp->u_arg[] array, and it may try to copy more data
117 * than is really available in <something>.
119 * umoven(tcp, addr, sizeof(sigset_t), &sigset)
120 * may be a bad idea: it'll try to read much more data than needed
121 * to fetch a sigset_t.
122 * Use (NSIG / 8) as a size instead.
126 signame(const int sig)
128 static char buf[sizeof("SIGRT_%u") + sizeof(int)*3];
131 const unsigned int s = sig;
136 if (s >= __SIGRTMIN && s <= __SIGRTMAX) {
137 sprintf(buf, "SIGRT_%u", s - __SIGRTMIN);
142 sprintf(buf, "%d", sig);
147 popcount32(const uint32_t *a, unsigned int size)
149 unsigned int count = 0;
151 for (; size; ++a, --size) {
154 #ifdef HAVE___BUILTIN_POPCOUNT
155 count += __builtin_popcount(x);
166 sprintsigmask_n(const char *prefix, const void *sig_mask, unsigned int bytes)
169 * The maximum number of signal names to be printed is NSIG * 2 / 3.
170 * Most of signal names have length 7,
171 * average length of signal names is less than 7.
172 * The length of prefix string does not exceed 16.
174 static char outstr[128 + 8 * (NSIG * 2 / 3)];
177 const uint32_t *mask;
178 uint32_t inverted_mask[NSIG / 32];
183 s = stpcpy(outstr, prefix);
186 /* length of signal mask in 4-byte words */
187 size = (bytes >= NSIG / 8) ? NSIG / 32 : (bytes + 3) / 4;
189 /* check whether 2/3 or more bits are set */
190 if (popcount32(mask, size) >= size * 32 * 2 / 3) {
191 /* show those signals that are NOT in the mask */
193 for (j = 0; j < size; ++j)
194 inverted_mask[j] = ~mask[j];
195 mask = inverted_mask;
200 for (i = 0; (i = next_set_bit(mask, i, size * 32)) >= 0; ) {
203 if ((unsigned) i < nsignals) {
204 s = stpcpy(s, signalent[i] + 3);
207 else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
208 s += sprintf(s, "RT_%u", i - __SIGRTMIN);
212 s += sprintf(s, "%u", i);
223 #define tprintsigmask_addr(prefix, mask) \
224 tprints(sprintsigmask_n((prefix), (mask), sizeof(mask)))
226 #define sprintsigmask_val(prefix, mask) \
227 sprintsigmask_n((prefix), &(mask), sizeof(mask))
229 #define tprintsigmask_val(prefix, mask) \
230 tprints(sprintsigmask_n((prefix), &(mask), sizeof(mask)))
235 tprints(signame(nr));
239 print_sigset_addr_len(struct tcb *tcp, long addr, long len)
247 /* Here len is usually equals NSIG / 8 or current_wordsize.
248 * But we code this defensively:
252 tprintf("%#lx", addr);
258 len = (len + 3) & ~3;
260 if (umoven(tcp, addr, len, mask) < 0)
262 tprints(sprintsigmask_n("", mask, len));
266 #define ILL_ILLOPC 1 /* illegal opcode */
267 #define ILL_ILLOPN 2 /* illegal operand */
268 #define ILL_ILLADR 3 /* illegal addressing mode */
269 #define ILL_ILLTRP 4 /* illegal trap */
270 #define ILL_PRVOPC 5 /* privileged opcode */
271 #define ILL_PRVREG 6 /* privileged register */
272 #define ILL_COPROC 7 /* coprocessor error */
273 #define ILL_BADSTK 8 /* internal stack error */
274 #define FPE_INTDIV 1 /* integer divide by zero */
275 #define FPE_INTOVF 2 /* integer overflow */
276 #define FPE_FLTDIV 3 /* floating point divide by zero */
277 #define FPE_FLTOVF 4 /* floating point overflow */
278 #define FPE_FLTUND 5 /* floating point underflow */
279 #define FPE_FLTRES 6 /* floating point inexact result */
280 #define FPE_FLTINV 7 /* floating point invalid operation */
281 #define FPE_FLTSUB 8 /* subscript out of range */
282 #define SEGV_MAPERR 1 /* address not mapped to object */
283 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */
284 #define BUS_ADRALN 1 /* invalid address alignment */
285 #define BUS_ADRERR 2 /* non-existant physical address */
286 #define BUS_OBJERR 3 /* object specific hardware error */
287 #define SYS_SECCOMP 1 /* seccomp triggered */
288 #define TRAP_BRKPT 1 /* process breakpoint */
289 #define TRAP_TRACE 2 /* process trace trap */
290 #define CLD_EXITED 1 /* child has exited */
291 #define CLD_KILLED 2 /* child was killed */
292 #define CLD_DUMPED 3 /* child terminated abnormally */
293 #define CLD_TRAPPED 4 /* traced child has trapped */
294 #define CLD_STOPPED 5 /* child has stopped */
295 #define CLD_CONTINUED 6 /* stopped child has continued */
296 #define POLL_IN 1 /* data input available */
297 #define POLL_OUT 2 /* output buffers available */
298 #define POLL_MSG 3 /* input message available */
299 #define POLL_ERR 4 /* i/o error */
300 #define POLL_PRI 5 /* high priority input available */
301 #define POLL_HUP 6 /* device disconnected */
302 #define SI_KERNEL 0x80 /* sent by kernel */
303 #define SI_USER 0 /* sent by kill, sigsend, raise */
304 #define SI_QUEUE -1 /* sent by sigqueue */
305 #define SI_TIMER -2 /* sent by timer expiration */
306 #define SI_MESGQ -3 /* sent by real time mesq state change */
307 #define SI_ASYNCIO -4 /* sent by AIO completion */
308 #define SI_SIGIO -5 /* sent by SIGIO */
309 #define SI_TKILL -6 /* sent by tkill */
310 #define SI_DETHREAD -7 /* sent by execve killing subsidiary threads */
311 #define SI_ASYNCNL -60 /* sent by asynch name lookup completion */
315 # define SI_FROMUSER(sip) ((sip)->si_code <= 0)
318 #include "xlat/siginfo_codes.h"
319 #include "xlat/sigill_codes.h"
320 #include "xlat/sigfpe_codes.h"
321 #include "xlat/sigtrap_codes.h"
322 #include "xlat/sigchld_codes.h"
323 #include "xlat/sigpoll_codes.h"
324 #include "xlat/sigprof_codes.h"
327 #include "xlat/sigemt_codes.h"
330 #include "xlat/sigsegv_codes.h"
331 #include "xlat/sigbus_codes.h"
334 # define SYS_SECCOMP 1
336 #include "xlat/sigsys_codes.h"
339 printsigsource(const siginfo_t *sip)
341 tprintf(", si_pid=%lu, si_uid=%lu",
342 (unsigned long) sip->si_pid,
343 (unsigned long) sip->si_uid);
347 printsigval(const siginfo_t *sip, int verbose)
352 tprintf(", si_value={int=%u, ptr=%#lx}",
354 (unsigned long) sip->si_ptr);
358 printsiginfo(const siginfo_t *sip, int verbose)
362 if (sip->si_signo == 0) {
366 tprints("{si_signo=");
367 printsignal(sip->si_signo);
368 code = xlookup(siginfo_codes, sip->si_code);
370 switch (sip->si_signo) {
372 code = xlookup(sigtrap_codes, sip->si_code);
375 code = xlookup(sigchld_codes, sip->si_code);
378 code = xlookup(sigpoll_codes, sip->si_code);
381 code = xlookup(sigprof_codes, sip->si_code);
384 code = xlookup(sigill_codes, sip->si_code);
388 code = xlookup(sigemt_codes, sip->si_code);
392 code = xlookup(sigfpe_codes, sip->si_code);
395 code = xlookup(sigsegv_codes, sip->si_code);
398 code = xlookup(sigbus_codes, sip->si_code);
401 code = xlookup(sigsys_codes, sip->si_code);
406 tprintf(", si_code=%s", code);
408 tprintf(", si_code=%#x", sip->si_code);
410 if (sip->si_code != SI_NOINFO)
414 if (sip->si_errno < 0 || (unsigned) sip->si_errno >= nerrnos)
415 tprintf(", si_errno=%d", sip->si_errno);
417 tprintf(", si_errno=%s",
418 errnoent[sip->si_errno]);
421 if (SI_FROMUSER(sip)) {
422 switch (sip->si_code) {
433 #if defined SI_TIMER \
434 && defined HAVE_SIGINFO_T_SI_TIMERID && defined HAVE_SIGINFO_T_SI_OVERRUN
436 tprintf(", si_timerid=%#x, si_overrun=%d",
437 sip->si_timerid, sip->si_overrun);
438 printsigval(sip, verbose);
444 printsigval(sip, verbose);
449 #endif /* SI_FROMUSER */
451 switch (sip->si_signo) {
454 tprints(", si_status=");
455 if (sip->si_code == CLD_EXITED)
456 tprintf("%d", sip->si_status);
458 printsignal(sip->si_status);
462 tprintf(", si_utime=%llu, si_stime=%llu",
463 (unsigned long long) sip->si_utime,
464 (unsigned long long) sip->si_stime);
466 case SIGILL: case SIGFPE:
467 case SIGSEGV: case SIGBUS:
468 tprintf(", si_addr=%#lx",
469 (unsigned long) sip->si_addr);
472 switch (sip->si_code) {
473 case POLL_IN: case POLL_OUT: case POLL_MSG:
474 tprintf(", si_band=%ld",
475 (long) sip->si_band);
479 #ifdef HAVE_SIGINFO_T_SI_SYSCALL
481 tprintf(", si_call_addr=%#lx, si_syscall=%d, si_arch=%u",
482 (unsigned long) sip->si_call_addr,
483 sip->si_syscall, sip->si_arch);
487 if (sip->si_pid || sip->si_uid)
490 printsigval(sip, verbose);
498 printsiginfo_at(struct tcb *tcp, long addr)
506 tprintf("%#lx", addr);
509 if (umove(tcp, addr, &si) < 0) {
513 printsiginfo(&si, verbose(tcp));
517 sys_sigsetmask(struct tcb *tcp)
520 tprintsigmask_val("", tcp->u_arg[0]);
522 else if (!syserror(tcp)) {
523 tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval);
524 return RVAL_HEX | RVAL_STR;
529 #ifdef HAVE_SIGACTION
531 struct old_sigaction {
532 /* sa_handler may be a libc #define, need to use other name: */
534 unsigned int sa_flags;
535 void (*__sa_handler)(int);
536 /* Kernel treats sa_mask as an array of longs. */
537 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
539 void (*__sa_handler)(int);
540 unsigned long sa_mask;
541 unsigned long sa_flags;
544 void (*sa_restorer)(void);
548 struct old_sigaction32 {
549 /* sa_handler may be a libc #define, need to use other name: */
550 uint32_t __sa_handler;
554 uint32_t sa_restorer;
559 decode_old_sigaction(struct tcb *tcp, long addr)
561 struct old_sigaction sa;
568 if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) {
569 tprintf("%#lx", addr);
573 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
574 if (current_wordsize != sizeof(sa.__sa_handler) && current_wordsize == 4) {
575 struct old_sigaction32 sa32;
576 r = umove(tcp, addr, &sa32);
578 memset(&sa, 0, sizeof(sa));
579 sa.__sa_handler = (void*)(uintptr_t)sa32.__sa_handler;
580 sa.sa_flags = sa32.sa_flags;
582 sa.sa_restorer = (void*)(uintptr_t)sa32.sa_restorer;
584 sa.sa_mask = sa32.sa_mask;
589 r = umove(tcp, addr, &sa);
596 /* Architectures using function pointers, like
597 * hppa, may need to manipulate the function pointer
598 * to compute the result of a comparison. However,
599 * the __sa_handler function pointer exists only in
600 * the address space of the traced process, and can't
601 * be manipulated by strace. In order to prevent the
602 * compiler from generating code to manipulate
603 * __sa_handler we cast the function pointers to long. */
604 if ((long)sa.__sa_handler == (long)SIG_ERR)
605 tprints("{SIG_ERR, ");
606 else if ((long)sa.__sa_handler == (long)SIG_DFL)
607 tprints("{SIG_DFL, ");
608 else if ((long)sa.__sa_handler == (long)SIG_IGN)
609 tprints("{SIG_IGN, ");
611 tprintf("{%#lx, ", (long) sa.__sa_handler);
613 tprintsigmask_addr("", sa.sa_mask);
615 tprintsigmask_val("", sa.sa_mask);
618 printflags(sigact_flags, sa.sa_flags, "SA_???");
620 if (sa.sa_flags & SA_RESTORER)
621 tprintf(", %p", sa.sa_restorer);
627 sys_sigaction(struct tcb *tcp)
630 printsignal(tcp->u_arg[0]);
632 decode_old_sigaction(tcp, tcp->u_arg[1]);
635 decode_old_sigaction(tcp, tcp->u_arg[2]);
640 sys_signal(struct tcb *tcp)
643 printsignal(tcp->u_arg[0]);
645 switch (tcp->u_arg[1]) {
656 tprintf("%#lx", tcp->u_arg[1]);
660 else if (!syserror(tcp)) {
661 switch (tcp->u_rval) {
663 tcp->auxstr = "SIG_ERR"; break;
665 tcp->auxstr = "SIG_DFL"; break;
667 tcp->auxstr = "SIG_IGN"; break;
671 return RVAL_HEX | RVAL_STR;
676 #endif /* HAVE_SIGACTION */
679 sys_sigreturn(struct tcb *tcp)
683 struct arm_sigcontext {
684 unsigned long trap_no;
685 unsigned long error_code;
686 unsigned long oldmask;
687 unsigned long arm_r0;
688 unsigned long arm_r1;
689 unsigned long arm_r2;
690 unsigned long arm_r3;
691 unsigned long arm_r4;
692 unsigned long arm_r5;
693 unsigned long arm_r6;
694 unsigned long arm_r7;
695 unsigned long arm_r8;
696 unsigned long arm_r9;
697 unsigned long arm_r10;
698 unsigned long arm_fp;
699 unsigned long arm_ip;
700 unsigned long arm_sp;
701 unsigned long arm_lr;
702 unsigned long arm_pc;
703 unsigned long arm_cpsr;
704 unsigned long fault_address;
706 struct arm_ucontext {
707 unsigned long uc_flags;
708 unsigned long uc_link; /* struct ucontext* */
709 /* The next three members comprise stack_t struct: */
710 unsigned long ss_sp; /* void* */
711 unsigned long ss_flags; /* int */
712 unsigned long ss_size; /* size_t */
713 struct arm_sigcontext sc;
714 /* These two members are sigset_t: */
715 unsigned long uc_sigmask[2];
716 /* more fields follow, which we aren't interested in */
718 struct arm_ucontext uc;
719 if (umove(tcp, arm_regs.ARM_sp, &uc) < 0)
722 * Kernel fills out uc.sc.oldmask too when it sets up signal stack,
723 * but for sigmask restore, sigreturn syscall uses uc.uc_sigmask instead.
725 tprintsigmask_addr(") (mask ", uc.uc_sigmask);
727 #elif defined(S390) || defined(S390X)
730 struct sigcontext sc;
731 if (upeek(tcp->pid, PT_GPR15, &usp) < 0)
733 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
735 tprintsigmask_addr(") (mask ", sc.oldmask);
737 #elif defined(I386) || defined(X86_64)
739 if (current_personality == 0) /* 64-bit */
743 struct i386_sigcontext_struct {
761 uint32_t esp_at_signal;
767 struct i386_fpstate {
775 uint8_t st[8][10]; /* 8*10 bytes: FP regs */
778 uint32_t fxsr_env[6];
781 uint8_t stx[8][16]; /* 8*16 bytes: FP regs, each padded to 16 bytes */
782 uint8_t xmm[8][16]; /* 8 XMM regs */
783 uint32_t padding1[44];
784 uint32_t padding2[12]; /* union with struct _fpx_sw_bytes */
787 struct i386_sigcontext_struct sc;
788 struct i386_fpstate fp;
789 uint32_t extramask[1];
791 /* On i386, sc is followed on stack by struct fpstate
792 * and after it an additional u32 extramask[1] which holds
793 * upper half of the mask.
796 if (umove(tcp, *i386_esp_ptr, &signal_stack) < 0)
798 sigmask[0] = signal_stack.sc.oldmask;
799 sigmask[1] = signal_stack.extramask[0];
800 tprintsigmask_addr(") (mask ", sigmask);
804 struct sigcontext sc;
806 /* offset of sigcontext in the kernel's sigframe structure: */
807 # define SIGFRAME_SC_OFFSET 0x90
808 if (upeek(tcp->pid, PT_R12, &sp) < 0)
810 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
812 tprintsigmask_val(") (mask ", sc.sc_mask);
814 #elif defined(POWERPC)
817 struct sigcontext sc;
819 esp = ppc_regs.gpr[1];
821 /* Skip dummy stack frame. */
823 if (current_personality == 0)
830 if (umove(tcp, esp, &sc) < 0)
832 tprintsigmask_val(") (mask ", sc.oldmask);
837 struct sigcontext sc;
838 if (upeek(tcp->pid, 4*PT_USP, &usp) < 0)
840 if (umove(tcp, usp, &sc) < 0)
842 tprintsigmask_val(") (mask ", sc.sc_mask);
847 struct sigcontext sc;
848 if (upeek(tcp->pid, REG_FP, &fp) < 0)
850 if (umove(tcp, fp, &sc) < 0)
852 tprintsigmask_val(") (mask ", sc.sc_mask);
854 #elif defined(SPARC) || defined(SPARC64)
858 i1 = sparc_regs.u_regs[U_REG_O1];
859 if (umove(tcp, i1, &si) < 0) {
860 perror_msg("sigreturn: umove");
863 tprintsigmask_val(") (mask ", si.si_mask);
865 #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
866 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
870 /* There are six words followed by a 128-byte siginfo. */
871 long sp = mips_REG_SP + 6 * 4 + 128;
872 if (umove(tcp, sp, &uc) < 0)
874 tprintsigmask_val(") (mask ", uc.uc_sigmask);
876 #elif defined(LINUX_MIPSO32)
879 if (umove(tcp, mips_REG_SP, &si) < 0)
881 tprintsigmask_val(") (mask ", si.si_mask);
883 #elif defined(CRISV10) || defined(CRISV32)
885 struct sigcontext sc;
887 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
888 perror_msg("sigreturn: PTRACE_GETREGS");
891 if (umove(tcp, regs[PT_USP], &sc) < 0)
893 tprintsigmask_val(") (mask ", sc.oldmask);
899 /* offset of ucontext in the kernel's sigframe structure */
900 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(siginfo_t)
901 if (umove(tcp, tile_regs.sp + SIGFRAME_UC_OFFSET, &uc) < 0)
903 tprintsigmask_val(") (mask ", uc.uc_sigmask);
905 #elif defined(MICROBLAZE)
906 /* TODO: Verify that this is correct... */
908 struct sigcontext sc;
910 /* Read r1, the stack pointer. */
911 if (upeek(tcp->pid, 1 * 4, &sp) < 0)
913 if (umove(tcp, sp, &sc) < 0)
915 tprintsigmask_val(") (mask ", sc.oldmask);
917 #elif defined(XTENSA)
918 /* Xtensa only has rt_sys_sigreturn */
920 /* ARC syscall ABI only supports rt_sys_sigreturn */
922 # warning No sys_sigreturn() for this architecture
923 # warning (no problem, just a reminder :-)
929 sys_siggetmask(struct tcb *tcp)
932 tcp->auxstr = sprintsigmask_val("mask ", tcp->u_rval);
934 return RVAL_HEX | RVAL_STR;
938 sys_sigsuspend(struct tcb *tcp)
941 tprintsigmask_val("", tcp->u_arg[2]);
946 #if !defined SS_ONSTACK
951 #include "xlat/sigaltstack_flags.h"
954 print_stack_t(struct tcb *tcp, unsigned long addr)
964 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
965 if (current_wordsize != sizeof(ss.ss_sp) && current_wordsize == 4) {
971 r = umove(tcp, addr, &ss32);
973 memset(&ss, 0, sizeof(ss));
974 ss.ss_sp = (void*)(unsigned long) ss32.ss_sp;
975 ss.ss_flags = ss32.ss_flags;
976 ss.ss_size = (unsigned long) ss32.ss_size;
981 r = umove(tcp, addr, &ss);
984 tprintf("%#lx", addr);
986 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
987 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
988 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
993 sys_sigaltstack(struct tcb *tcp)
996 print_stack_t(tcp, tcp->u_arg[0]);
1000 print_stack_t(tcp, tcp->u_arg[1]);
1005 #ifdef HAVE_SIGACTION
1007 /* "Old" sigprocmask, which operates with word-sized signal masks */
1009 sys_sigprocmask(struct tcb *tcp)
1012 if (entering(tcp)) {
1014 * Alpha/OSF is different: it doesn't pass in two pointers,
1015 * but rather passes in the new bitmask as an argument and
1016 * then returns the old bitmask. This "works" because we
1017 * only have 64 signals to worry about. If you want more,
1018 * use of the rt_sigprocmask syscall is required.
1020 * old = osf_sigprocmask(how, new);
1022 * ret = sigprocmask(how, &new, &old, ...);
1024 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1025 tprintsigmask_val(", ", tcp->u_arg[1]);
1027 else if (!syserror(tcp)) {
1028 tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval);
1029 return RVAL_HEX | RVAL_STR;
1032 if (entering(tcp)) {
1033 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1035 print_sigset_addr_len(tcp, tcp->u_arg[1], current_wordsize);
1040 tprintf("%#lx", tcp->u_arg[2]);
1042 print_sigset_addr_len(tcp, tcp->u_arg[2], current_wordsize);
1044 # endif /* !ALPHA */
1048 #endif /* HAVE_SIGACTION */
1051 sys_kill(struct tcb *tcp)
1053 if (entering(tcp)) {
1055 widen_to_long(tcp->u_arg[0]),
1056 signame(tcp->u_arg[1])
1063 sys_tgkill(struct tcb *tcp)
1065 if (entering(tcp)) {
1066 tprintf("%ld, %ld, %s",
1067 widen_to_long(tcp->u_arg[0]),
1068 widen_to_long(tcp->u_arg[1]),
1069 signame(tcp->u_arg[2])
1076 sys_sigpending(struct tcb *tcp)
1080 tprintf("%#lx", tcp->u_arg[0]);
1082 print_sigset_addr_len(tcp, tcp->u_arg[0], current_wordsize);
1088 sys_rt_sigprocmask(struct tcb *tcp)
1090 /* Note: arg[3] is the length of the sigset. Kernel requires NSIG / 8 */
1091 if (entering(tcp)) {
1092 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1094 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[3]);
1099 tprintf("%#lx", tcp->u_arg[2]);
1101 print_sigset_addr_len(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1102 tprintf(", %lu", tcp->u_arg[3]);
1107 /* Structure describing the action to be taken when a signal arrives. */
1108 struct new_sigaction
1110 /* sa_handler may be a libc #define, need to use other name: */
1112 unsigned int sa_flags;
1113 void (*__sa_handler)(int);
1115 void (*__sa_handler)(int);
1116 unsigned long sa_flags;
1119 void (*sa_restorer)(void);
1121 /* Kernel treats sa_mask as an array of longs. */
1122 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1124 /* Same for i386-on-x86_64 and similar cases */
1125 struct new_sigaction32
1127 uint32_t __sa_handler;
1130 uint32_t sa_restorer;
1132 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1136 decode_new_sigaction(struct tcb *tcp, long addr)
1138 struct new_sigaction sa;
1145 if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) {
1146 tprintf("%#lx", addr);
1149 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
1150 if (current_wordsize != sizeof(sa.sa_flags) && current_wordsize == 4) {
1151 struct new_sigaction32 sa32;
1152 r = umove(tcp, addr, &sa32);
1154 memset(&sa, 0, sizeof(sa));
1155 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1156 sa.sa_flags = sa32.sa_flags;
1158 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1160 /* Kernel treats sa_mask as an array of longs.
1161 * For 32-bit process, "long" is uint32_t, thus, for example,
1162 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1163 * But for (64-bit) kernel, 32th bit in sa_mask is
1164 * 32th bit in 0th (64-bit) long!
1165 * For little-endian, it's the same.
1166 * For big-endian, we swap 32-bit words.
1168 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1173 r = umove(tcp, addr, &sa);
1179 /* Architectures using function pointers, like
1180 * hppa, may need to manipulate the function pointer
1181 * to compute the result of a comparison. However,
1182 * the __sa_handler function pointer exists only in
1183 * the address space of the traced process, and can't
1184 * be manipulated by strace. In order to prevent the
1185 * compiler from generating code to manipulate
1186 * __sa_handler we cast the function pointers to long. */
1187 if ((long)sa.__sa_handler == (long)SIG_ERR)
1188 tprints("{SIG_ERR, ");
1189 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1190 tprints("{SIG_DFL, ");
1191 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1192 tprints("{SIG_IGN, ");
1194 tprintf("{%#lx, ", (long) sa.__sa_handler);
1196 * Sigset size is in tcp->u_arg[4] (SPARC)
1197 * or in tcp->u_arg[3] (all other),
1198 * but kernel won't handle sys_rt_sigaction
1199 * with wrong sigset size (just returns EINVAL instead).
1200 * We just fetch the right size, which is NSIG / 8.
1202 tprintsigmask_val("", sa.sa_mask);
1205 printflags(sigact_flags, sa.sa_flags, "SA_???");
1207 if (sa.sa_flags & SA_RESTORER)
1208 tprintf(", %p", sa.sa_restorer);
1214 sys_rt_sigaction(struct tcb *tcp)
1216 if (entering(tcp)) {
1217 printsignal(tcp->u_arg[0]);
1219 decode_new_sigaction(tcp, tcp->u_arg[1]);
1222 decode_new_sigaction(tcp, tcp->u_arg[2]);
1223 #if defined(SPARC) || defined(SPARC64)
1224 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1225 #elif defined(ALPHA)
1226 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1228 tprintf(", %lu", tcp->u_arg[3]);
1235 sys_rt_sigpending(struct tcb *tcp)
1239 * One of the few syscalls where sigset size (arg[1])
1240 * is allowed to be <= NSIG / 8, not strictly ==.
1241 * This allows non-rt sigpending() syscall
1242 * to reuse rt_sigpending() code in kernel.
1245 tprintf("%#lx", tcp->u_arg[0]);
1247 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1248 tprintf(", %lu", tcp->u_arg[1]);
1254 sys_rt_sigsuspend(struct tcb *tcp)
1256 if (entering(tcp)) {
1257 /* NB: kernel requires arg[1] == NSIG / 8 */
1258 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1259 tprintf(", %lu", tcp->u_arg[1]);
1265 print_sigqueueinfo(struct tcb *tcp, int sig, unsigned long uinfo)
1269 printsiginfo_at(tcp, uinfo);
1273 sys_rt_sigqueueinfo(struct tcb *tcp)
1275 if (entering(tcp)) {
1276 tprintf("%lu, ", tcp->u_arg[0]);
1277 print_sigqueueinfo(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1283 sys_rt_tgsigqueueinfo(struct tcb *tcp)
1285 if (entering(tcp)) {
1286 tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
1287 print_sigqueueinfo(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1292 int sys_rt_sigtimedwait(struct tcb *tcp)
1294 /* NB: kernel requires arg[3] == NSIG / 8 */
1295 if (entering(tcp)) {
1296 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[3]);
1298 /* This is the only "return" parameter, */
1299 if (tcp->u_arg[1] != 0)
1301 /* ... if it's NULL, can decode all on entry */
1304 else if (tcp->u_arg[1] != 0) {
1305 /* syscall exit, and u_arg[1] wasn't NULL */
1306 printsiginfo_at(tcp, tcp->u_arg[1]);
1310 /* syscall exit, and u_arg[1] was NULL */
1313 print_timespec(tcp, tcp->u_arg[2]);
1314 tprintf(", %lu", tcp->u_arg[3]);
1319 sys_restart_syscall(struct tcb *tcp)
1322 tprints("<... resuming interrupted call ...>");
1327 do_signalfd(struct tcb *tcp, int flags_arg)
1329 /* NB: kernel requires arg[2] == NSIG / 8 */
1330 if (entering(tcp)) {
1331 printfd(tcp, tcp->u_arg[0]);
1333 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1334 tprintf(", %lu", tcp->u_arg[2]);
1335 if (flags_arg >= 0) {
1337 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1344 sys_signalfd(struct tcb *tcp)
1346 return do_signalfd(tcp, -1);
1350 sys_signalfd4(struct tcb *tcp)
1352 return do_signalfd(tcp, 3);