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.
42 #ifdef HAVE_LINUX_PTRACE_H
43 # undef PTRACE_SYSCALL
44 # ifdef HAVE_STRUCT_IA64_FPREG
45 # define ia64_fpreg XXX_ia64_fpreg
47 # ifdef HAVE_STRUCT_PT_ALL_USER_REGS
48 # define pt_all_user_regs XXX_pt_all_user_regs
50 # ifdef HAVE_STRUCT_PTRACE_PEEKSIGINFO_ARGS
51 # define ptrace_peeksiginfo_args XXX_ptrace_peeksiginfo_args
53 # include <linux/ptrace.h>
54 # undef ptrace_peeksiginfo_args
56 # undef pt_all_user_regs
60 # include <asm/ptrace_offsets.h>
63 #if defined(SPARC) || defined(SPARC64) || defined(MIPS)
65 struct pt_regs si_regs;
68 #elif defined HAVE_ASM_SIGCONTEXT_H
69 # if !defined(IA64) && !defined(X86_64) && !defined(X32)
70 # include <asm/sigcontext.h>
72 #else /* !HAVE_ASM_SIGCONTEXT_H */
73 # if defined M68K && !defined HAVE_STRUCT_SIGCONTEXT
75 unsigned long sc_mask;
83 unsigned short sc_formatvec;
86 #endif /* !HAVE_ASM_SIGCONTEXT_H */
89 # warning: NSIG is not defined, using 32
97 /* The libc headers do not define this constant since it should only be
98 used by the implementation. So we define it here. */
100 # ifdef ASM_SA_RESTORER
101 # define SA_RESTORER ASM_SA_RESTORER
105 /* Some arches define this in their headers, but don't actually have it,
106 so we have to delete the define. */
107 #if defined(HPPA) || defined(IA64)
111 #include "xlat/sigact_flags.h"
112 #include "xlat/sigprocmaskcmds.h"
114 #endif /* HAVE_SIGACTION */
116 /* Anonymous realtime signals. */
117 /* Under glibc 2.1, SIGRTMIN et al are functions, but __SIGRTMIN is a
118 constant. This is what we want. Otherwise, just use SIGRTMIN. */
121 #define __SIGRTMIN SIGRTMIN
122 #define __SIGRTMAX SIGRTMAX /* likewise */
126 /* Note on the size of sigset_t:
128 * In glibc, sigset_t is an array with space for 1024 bits (!),
129 * even though all arches supported by Linux have only 64 signals
130 * except MIPS, which has 128. IOW, it is 128 bytes long.
132 * In-kernel sigset_t is sized correctly (it is either 64 or 128 bit long).
133 * However, some old syscall return only 32 lower bits (one word).
134 * Example: sys_sigpending vs sys_rt_sigpending.
136 * Be aware of this fact when you try to
137 * memcpy(&tcp->u_arg[1], &something, sizeof(sigset_t))
138 * - sizeof(sigset_t) is much bigger than you think,
139 * it may overflow tcp->u_arg[] array, and it may try to copy more data
140 * than is really available in <something>.
142 * umoven(tcp, addr, sizeof(sigset_t), &sigset)
143 * may be a bad idea: it'll try to read much more data than needed
144 * to fetch a sigset_t.
145 * Use (NSIG / 8) as a size instead.
149 signame(const int sig)
151 static char buf[sizeof("SIGRT_%u") + sizeof(int)*3];
154 const unsigned int s = sig;
159 if (s >= __SIGRTMIN && s <= __SIGRTMAX) {
160 sprintf(buf, "SIGRT_%u", s - __SIGRTMIN);
165 sprintf(buf, "%d", sig);
170 popcount32(const uint32_t *a, unsigned int size)
172 unsigned int count = 0;
174 for (; size; ++a, --size) {
177 #ifdef HAVE___BUILTIN_POPCOUNT
178 count += __builtin_popcount(x);
189 sprintsigmask_n(const char *prefix, const void *sig_mask, unsigned int bytes)
192 * The maximum number of signal names to be printed is NSIG * 2 / 3.
193 * Most of signal names have length 7,
194 * average length of signal names is less than 7.
195 * The length of prefix string does not exceed 16.
197 static char outstr[128 + 8 * (NSIG * 2 / 3)];
200 const uint32_t *mask;
201 uint32_t inverted_mask[NSIG / 32];
206 s = stpcpy(outstr, prefix);
209 /* length of signal mask in 4-byte words */
210 size = (bytes >= NSIG / 8) ? NSIG / 32 : (bytes + 3) / 4;
212 /* check whether 2/3 or more bits are set */
213 if (popcount32(mask, size) >= size * 32 * 2 / 3) {
214 /* show those signals that are NOT in the mask */
216 for (j = 0; j < size; ++j)
217 inverted_mask[j] = ~mask[j];
218 mask = inverted_mask;
223 for (i = 0; (i = next_set_bit(mask, i, size * 32)) >= 0; ) {
226 if ((unsigned) i < nsignals) {
227 s = stpcpy(s, signalent[i] + 3);
230 else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
231 s += sprintf(s, "RT_%u", i - __SIGRTMIN);
235 s += sprintf(s, "%u", i);
246 #define tprintsigmask_addr(prefix, mask) \
247 tprints(sprintsigmask_n((prefix), (mask), sizeof(mask)))
249 #define sprintsigmask_val(prefix, mask) \
250 sprintsigmask_n((prefix), &(mask), sizeof(mask))
252 #define tprintsigmask_val(prefix, mask) \
253 tprints(sprintsigmask_n((prefix), &(mask), sizeof(mask)))
258 tprints(signame(nr));
262 print_sigset_addr_len(struct tcb *tcp, long addr, long len)
270 /* Here len is usually equals NSIG / 8 or current_wordsize.
271 * But we code this defensively:
275 tprintf("%#lx", addr);
281 len = (len + 3) & ~3;
283 if (umoven(tcp, addr, len, mask) < 0)
285 tprints(sprintsigmask_n("", mask, len));
289 #define ILL_ILLOPC 1 /* illegal opcode */
290 #define ILL_ILLOPN 2 /* illegal operand */
291 #define ILL_ILLADR 3 /* illegal addressing mode */
292 #define ILL_ILLTRP 4 /* illegal trap */
293 #define ILL_PRVOPC 5 /* privileged opcode */
294 #define ILL_PRVREG 6 /* privileged register */
295 #define ILL_COPROC 7 /* coprocessor error */
296 #define ILL_BADSTK 8 /* internal stack error */
297 #define FPE_INTDIV 1 /* integer divide by zero */
298 #define FPE_INTOVF 2 /* integer overflow */
299 #define FPE_FLTDIV 3 /* floating point divide by zero */
300 #define FPE_FLTOVF 4 /* floating point overflow */
301 #define FPE_FLTUND 5 /* floating point underflow */
302 #define FPE_FLTRES 6 /* floating point inexact result */
303 #define FPE_FLTINV 7 /* floating point invalid operation */
304 #define FPE_FLTSUB 8 /* subscript out of range */
305 #define SEGV_MAPERR 1 /* address not mapped to object */
306 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */
307 #define BUS_ADRALN 1 /* invalid address alignment */
308 #define BUS_ADRERR 2 /* non-existant physical address */
309 #define BUS_OBJERR 3 /* object specific hardware error */
310 #define SYS_SECCOMP 1 /* seccomp triggered */
311 #define TRAP_BRKPT 1 /* process breakpoint */
312 #define TRAP_TRACE 2 /* process trace trap */
313 #define CLD_EXITED 1 /* child has exited */
314 #define CLD_KILLED 2 /* child was killed */
315 #define CLD_DUMPED 3 /* child terminated abnormally */
316 #define CLD_TRAPPED 4 /* traced child has trapped */
317 #define CLD_STOPPED 5 /* child has stopped */
318 #define CLD_CONTINUED 6 /* stopped child has continued */
319 #define POLL_IN 1 /* data input available */
320 #define POLL_OUT 2 /* output buffers available */
321 #define POLL_MSG 3 /* input message available */
322 #define POLL_ERR 4 /* i/o error */
323 #define POLL_PRI 5 /* high priority input available */
324 #define POLL_HUP 6 /* device disconnected */
325 #define SI_KERNEL 0x80 /* sent by kernel */
326 #define SI_USER 0 /* sent by kill, sigsend, raise */
327 #define SI_QUEUE -1 /* sent by sigqueue */
328 #define SI_TIMER -2 /* sent by timer expiration */
329 #define SI_MESGQ -3 /* sent by real time mesq state change */
330 #define SI_ASYNCIO -4 /* sent by AIO completion */
331 #define SI_SIGIO -5 /* sent by SIGIO */
332 #define SI_TKILL -6 /* sent by tkill */
333 #define SI_DETHREAD -7 /* sent by execve killing subsidiary threads */
334 #define SI_ASYNCNL -60 /* sent by asynch name lookup completion */
338 # define SI_FROMUSER(sip) ((sip)->si_code <= 0)
341 #include "xlat/siginfo_codes.h"
342 #include "xlat/sigill_codes.h"
343 #include "xlat/sigfpe_codes.h"
344 #include "xlat/sigtrap_codes.h"
345 #include "xlat/sigchld_codes.h"
346 #include "xlat/sigpoll_codes.h"
347 #include "xlat/sigprof_codes.h"
350 #include "xlat/sigemt_codes.h"
353 #include "xlat/sigsegv_codes.h"
354 #include "xlat/sigbus_codes.h"
357 # define SYS_SECCOMP 1
359 #include "xlat/sigsys_codes.h"
362 printsigsource(const siginfo_t *sip)
364 tprintf(", si_pid=%lu, si_uid=%lu",
365 (unsigned long) sip->si_pid,
366 (unsigned long) sip->si_uid);
370 printsigval(const siginfo_t *sip, int verbose)
375 tprintf(", si_value={int=%u, ptr=%#lx}",
377 (unsigned long) sip->si_ptr);
381 printsiginfo(siginfo_t *sip, int verbose)
385 if (sip->si_signo == 0) {
389 tprints("{si_signo=");
390 printsignal(sip->si_signo);
391 code = xlookup(siginfo_codes, sip->si_code);
393 switch (sip->si_signo) {
395 code = xlookup(sigtrap_codes, sip->si_code);
398 code = xlookup(sigchld_codes, sip->si_code);
401 code = xlookup(sigpoll_codes, sip->si_code);
404 code = xlookup(sigprof_codes, sip->si_code);
407 code = xlookup(sigill_codes, sip->si_code);
411 code = xlookup(sigemt_codes, sip->si_code);
415 code = xlookup(sigfpe_codes, sip->si_code);
418 code = xlookup(sigsegv_codes, sip->si_code);
421 code = xlookup(sigbus_codes, sip->si_code);
424 code = xlookup(sigsys_codes, sip->si_code);
429 tprintf(", si_code=%s", code);
431 tprintf(", si_code=%#x", sip->si_code);
433 if (sip->si_code != SI_NOINFO)
437 if (sip->si_errno < 0 || (unsigned) sip->si_errno >= nerrnos)
438 tprintf(", si_errno=%d", sip->si_errno);
440 tprintf(", si_errno=%s",
441 errnoent[sip->si_errno]);
444 if (SI_FROMUSER(sip)) {
445 switch (sip->si_code) {
456 #if defined SI_TIMER \
457 && defined HAVE_SIGINFO_T_SI_TIMERID && defined HAVE_SIGINFO_T_SI_OVERRUN
459 tprintf(", si_timerid=%#x, si_overrun=%d",
460 sip->si_timerid, sip->si_overrun);
461 printsigval(sip, verbose);
467 printsigval(sip, verbose);
472 #endif /* SI_FROMUSER */
474 switch (sip->si_signo) {
477 tprints(", si_status=");
478 if (sip->si_code == CLD_EXITED)
479 tprintf("%d", sip->si_status);
481 printsignal(sip->si_status);
485 tprintf(", si_utime=%llu, si_stime=%llu",
486 (unsigned long long) sip->si_utime,
487 (unsigned long long) sip->si_stime);
489 case SIGILL: case SIGFPE:
490 case SIGSEGV: case SIGBUS:
491 tprintf(", si_addr=%#lx",
492 (unsigned long) sip->si_addr);
495 switch (sip->si_code) {
496 case POLL_IN: case POLL_OUT: case POLL_MSG:
497 tprintf(", si_band=%ld",
498 (long) sip->si_band);
502 #ifdef HAVE_SIGINFO_T_SI_SYSCALL
504 tprintf(", si_call_addr=%#lx, si_syscall=%d, si_arch=%u",
505 (unsigned long) sip->si_call_addr,
506 sip->si_syscall, sip->si_arch);
510 if (sip->si_pid || sip->si_uid)
513 printsigval(sip, verbose);
521 printsiginfo_at(struct tcb *tcp, long addr)
529 tprintf("%#lx", addr);
532 if (umove(tcp, addr, &si) < 0) {
536 printsiginfo(&si, verbose(tcp));
540 sys_sigsetmask(struct tcb *tcp)
543 tprintsigmask_val("", tcp->u_arg[0]);
545 else if (!syserror(tcp)) {
546 tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval);
547 return RVAL_HEX | RVAL_STR;
552 #ifdef HAVE_SIGACTION
554 struct old_sigaction {
555 /* sa_handler may be a libc #define, need to use other name: */
557 unsigned int sa_flags;
558 void (*__sa_handler)(int);
559 /* Kernel treats sa_mask as an array of longs. */
560 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
562 void (*__sa_handler)(int);
563 unsigned long sa_mask;
564 unsigned long sa_flags;
567 void (*sa_restorer)(void);
571 struct old_sigaction32 {
572 /* sa_handler may be a libc #define, need to use other name: */
573 uint32_t __sa_handler;
577 uint32_t sa_restorer;
582 decode_old_sigaction(struct tcb *tcp, long addr)
584 struct old_sigaction sa;
591 if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) {
592 tprintf("%#lx", addr);
596 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
597 if (current_wordsize != sizeof(sa.__sa_handler) && current_wordsize == 4) {
598 struct old_sigaction32 sa32;
599 r = umove(tcp, addr, &sa32);
601 memset(&sa, 0, sizeof(sa));
602 sa.__sa_handler = (void*)(uintptr_t)sa32.__sa_handler;
603 sa.sa_flags = sa32.sa_flags;
605 sa.sa_restorer = (void*)(uintptr_t)sa32.sa_restorer;
607 sa.sa_mask = sa32.sa_mask;
612 r = umove(tcp, addr, &sa);
619 /* Architectures using function pointers, like
620 * hppa, may need to manipulate the function pointer
621 * to compute the result of a comparison. However,
622 * the __sa_handler function pointer exists only in
623 * the address space of the traced process, and can't
624 * be manipulated by strace. In order to prevent the
625 * compiler from generating code to manipulate
626 * __sa_handler we cast the function pointers to long. */
627 if ((long)sa.__sa_handler == (long)SIG_ERR)
628 tprints("{SIG_ERR, ");
629 else if ((long)sa.__sa_handler == (long)SIG_DFL)
630 tprints("{SIG_DFL, ");
631 else if ((long)sa.__sa_handler == (long)SIG_IGN)
632 tprints("{SIG_IGN, ");
634 tprintf("{%#lx, ", (long) sa.__sa_handler);
636 tprintsigmask_addr("", sa.sa_mask);
638 tprintsigmask_val("", sa.sa_mask);
641 printflags(sigact_flags, sa.sa_flags, "SA_???");
643 if (sa.sa_flags & SA_RESTORER)
644 tprintf(", %p", sa.sa_restorer);
650 sys_sigaction(struct tcb *tcp)
653 printsignal(tcp->u_arg[0]);
655 decode_old_sigaction(tcp, tcp->u_arg[1]);
658 decode_old_sigaction(tcp, tcp->u_arg[2]);
663 sys_signal(struct tcb *tcp)
666 printsignal(tcp->u_arg[0]);
668 switch (tcp->u_arg[1]) {
679 tprintf("%#lx", tcp->u_arg[1]);
683 else if (!syserror(tcp)) {
684 switch (tcp->u_rval) {
686 tcp->auxstr = "SIG_ERR"; break;
688 tcp->auxstr = "SIG_DFL"; break;
690 tcp->auxstr = "SIG_IGN"; break;
694 return RVAL_HEX | RVAL_STR;
699 #endif /* HAVE_SIGACTION */
702 sys_sigreturn(struct tcb *tcp)
706 struct arm_sigcontext {
707 unsigned long trap_no;
708 unsigned long error_code;
709 unsigned long oldmask;
710 unsigned long arm_r0;
711 unsigned long arm_r1;
712 unsigned long arm_r2;
713 unsigned long arm_r3;
714 unsigned long arm_r4;
715 unsigned long arm_r5;
716 unsigned long arm_r6;
717 unsigned long arm_r7;
718 unsigned long arm_r8;
719 unsigned long arm_r9;
720 unsigned long arm_r10;
721 unsigned long arm_fp;
722 unsigned long arm_ip;
723 unsigned long arm_sp;
724 unsigned long arm_lr;
725 unsigned long arm_pc;
726 unsigned long arm_cpsr;
727 unsigned long fault_address;
729 struct arm_ucontext {
730 unsigned long uc_flags;
731 unsigned long uc_link; /* struct ucontext* */
732 /* The next three members comprise stack_t struct: */
733 unsigned long ss_sp; /* void* */
734 unsigned long ss_flags; /* int */
735 unsigned long ss_size; /* size_t */
736 struct arm_sigcontext sc;
737 /* These two members are sigset_t: */
738 unsigned long uc_sigmask[2];
739 /* more fields follow, which we aren't interested in */
741 struct arm_ucontext uc;
742 if (umove(tcp, arm_regs.ARM_sp, &uc) < 0)
745 * Kernel fills out uc.sc.oldmask too when it sets up signal stack,
746 * but for sigmask restore, sigreturn syscall uses uc.uc_sigmask instead.
748 tprintsigmask_addr(") (mask ", uc.uc_sigmask);
750 #elif defined(S390) || defined(S390X)
753 struct sigcontext sc;
754 if (upeek(tcp->pid, PT_GPR15, &usp) < 0)
756 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
758 tprintsigmask_addr(") (mask ", sc.oldmask);
760 #elif defined(I386) || defined(X86_64)
762 if (current_personality == 0) /* 64-bit */
766 struct i386_sigcontext_struct {
784 uint32_t esp_at_signal;
790 struct i386_fpstate {
798 uint8_t st[8][10]; /* 8*10 bytes: FP regs */
801 uint32_t fxsr_env[6];
804 uint8_t stx[8][16]; /* 8*16 bytes: FP regs, each padded to 16 bytes */
805 uint8_t xmm[8][16]; /* 8 XMM regs */
806 uint32_t padding1[44];
807 uint32_t padding2[12]; /* union with struct _fpx_sw_bytes */
810 struct i386_sigcontext_struct sc;
811 struct i386_fpstate fp;
812 uint32_t extramask[1];
814 /* On i386, sc is followed on stack by struct fpstate
815 * and after it an additional u32 extramask[1] which holds
816 * upper half of the mask.
819 if (umove(tcp, *i386_esp_ptr, &signal_stack) < 0)
821 sigmask[0] = signal_stack.sc.oldmask;
822 sigmask[1] = signal_stack.extramask[0];
823 tprintsigmask_addr(") (mask ", sigmask);
827 struct sigcontext sc;
829 /* offset of sigcontext in the kernel's sigframe structure: */
830 # define SIGFRAME_SC_OFFSET 0x90
831 if (upeek(tcp->pid, PT_R12, &sp) < 0)
833 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
835 tprintsigmask_val(") (mask ", sc.sc_mask);
837 #elif defined(POWERPC)
840 struct sigcontext sc;
842 esp = ppc_regs.gpr[1];
844 /* Skip dummy stack frame. */
846 if (current_personality == 0)
853 if (umove(tcp, esp, &sc) < 0)
855 tprintsigmask_val(") (mask ", sc.oldmask);
860 struct sigcontext sc;
861 if (upeek(tcp->pid, 4*PT_USP, &usp) < 0)
863 if (umove(tcp, usp, &sc) < 0)
865 tprintsigmask_val(") (mask ", sc.sc_mask);
870 struct sigcontext sc;
871 if (upeek(tcp->pid, REG_FP, &fp) < 0)
873 if (umove(tcp, fp, &sc) < 0)
875 tprintsigmask_val(") (mask ", sc.sc_mask);
877 #elif defined(SPARC) || defined(SPARC64)
881 i1 = sparc_regs.u_regs[U_REG_O1];
882 if (umove(tcp, i1, &si) < 0) {
883 perror_msg("sigreturn: umove");
886 tprintsigmask_val(") (mask ", si.si_mask);
888 #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
889 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
894 if (upeek(tcp->pid, REG_SP, &sp) < 0)
896 /* There are six words followed by a 128-byte siginfo. */
897 sp = sp + 6 * 4 + 128;
898 if (umove(tcp, sp, &uc) < 0)
900 tprintsigmask_val(") (mask ", uc.uc_sigmask);
907 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
908 perror_msg("sigreturn: PTRACE_GETREGS");
912 if (umove(tcp, sp, &si) < 0)
914 tprintsigmask_val(") (mask ", si.si_mask);
916 #elif defined(CRISV10) || defined(CRISV32)
918 struct sigcontext sc;
920 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
921 perror_msg("sigreturn: PTRACE_GETREGS");
924 if (umove(tcp, regs[PT_USP], &sc) < 0)
926 tprintsigmask_val(") (mask ", sc.oldmask);
932 /* offset of ucontext in the kernel's sigframe structure */
933 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(siginfo_t)
934 if (umove(tcp, tile_regs.sp + SIGFRAME_UC_OFFSET, &uc) < 0)
936 tprintsigmask_val(") (mask ", uc.uc_sigmask);
938 #elif defined(MICROBLAZE)
939 /* TODO: Verify that this is correct... */
941 struct sigcontext sc;
943 /* Read r1, the stack pointer. */
944 if (upeek(tcp->pid, 1 * 4, &sp) < 0)
946 if (umove(tcp, sp, &sc) < 0)
948 tprintsigmask_val(") (mask ", sc.oldmask);
950 #elif defined(XTENSA)
951 /* Xtensa only has rt_sys_sigreturn */
953 /* ARC syscall ABI only supports rt_sys_sigreturn */
955 # warning No sys_sigreturn() for this architecture
956 # warning (no problem, just a reminder :-)
962 sys_siggetmask(struct tcb *tcp)
965 tcp->auxstr = sprintsigmask_val("mask ", tcp->u_rval);
967 return RVAL_HEX | RVAL_STR;
971 sys_sigsuspend(struct tcb *tcp)
974 tprintsigmask_val("", tcp->u_arg[2]);
979 #if !defined SS_ONSTACK
984 #include "xlat/sigaltstack_flags.h"
987 print_stack_t(struct tcb *tcp, unsigned long addr)
997 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
998 if (current_wordsize != sizeof(ss.ss_sp) && current_wordsize == 4) {
1004 r = umove(tcp, addr, &ss32);
1006 memset(&ss, 0, sizeof(ss));
1007 ss.ss_sp = (void*)(unsigned long) ss32.ss_sp;
1008 ss.ss_flags = ss32.ss_flags;
1009 ss.ss_size = (unsigned long) ss32.ss_size;
1014 r = umove(tcp, addr, &ss);
1017 tprintf("%#lx", addr);
1019 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1020 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1021 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1026 sys_sigaltstack(struct tcb *tcp)
1028 if (entering(tcp)) {
1029 print_stack_t(tcp, tcp->u_arg[0]);
1033 print_stack_t(tcp, tcp->u_arg[1]);
1038 #ifdef HAVE_SIGACTION
1040 /* "Old" sigprocmask, which operates with word-sized signal masks */
1042 sys_sigprocmask(struct tcb *tcp)
1045 if (entering(tcp)) {
1047 * Alpha/OSF is different: it doesn't pass in two pointers,
1048 * but rather passes in the new bitmask as an argument and
1049 * then returns the old bitmask. This "works" because we
1050 * only have 64 signals to worry about. If you want more,
1051 * use of the rt_sigprocmask syscall is required.
1053 * old = osf_sigprocmask(how, new);
1055 * ret = sigprocmask(how, &new, &old, ...);
1057 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1058 tprintsigmask_val(", ", tcp->u_arg[1]);
1060 else if (!syserror(tcp)) {
1061 tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval);
1062 return RVAL_HEX | RVAL_STR;
1065 if (entering(tcp)) {
1066 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1068 print_sigset_addr_len(tcp, tcp->u_arg[1], current_wordsize);
1073 tprintf("%#lx", tcp->u_arg[2]);
1075 print_sigset_addr_len(tcp, tcp->u_arg[2], current_wordsize);
1077 # endif /* !ALPHA */
1081 #endif /* HAVE_SIGACTION */
1084 sys_kill(struct tcb *tcp)
1086 if (entering(tcp)) {
1088 widen_to_long(tcp->u_arg[0]),
1089 signame(tcp->u_arg[1])
1096 sys_tgkill(struct tcb *tcp)
1098 if (entering(tcp)) {
1099 tprintf("%ld, %ld, %s",
1100 widen_to_long(tcp->u_arg[0]),
1101 widen_to_long(tcp->u_arg[1]),
1102 signame(tcp->u_arg[2])
1109 sys_sigpending(struct tcb *tcp)
1113 tprintf("%#lx", tcp->u_arg[0]);
1115 print_sigset_addr_len(tcp, tcp->u_arg[0], current_wordsize);
1121 sys_rt_sigprocmask(struct tcb *tcp)
1123 /* Note: arg[3] is the length of the sigset. Kernel requires NSIG / 8 */
1124 if (entering(tcp)) {
1125 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1127 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[3]);
1132 tprintf("%#lx", tcp->u_arg[2]);
1134 print_sigset_addr_len(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1135 tprintf(", %lu", tcp->u_arg[3]);
1140 /* Structure describing the action to be taken when a signal arrives. */
1141 struct new_sigaction
1143 /* sa_handler may be a libc #define, need to use other name: */
1145 unsigned int sa_flags;
1146 void (*__sa_handler)(int);
1148 void (*__sa_handler)(int);
1149 unsigned long sa_flags;
1152 void (*sa_restorer)(void);
1154 /* Kernel treats sa_mask as an array of longs. */
1155 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1157 /* Same for i386-on-x86_64 and similar cases */
1158 struct new_sigaction32
1160 uint32_t __sa_handler;
1163 uint32_t sa_restorer;
1165 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1169 decode_new_sigaction(struct tcb *tcp, long addr)
1171 struct new_sigaction sa;
1178 if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) {
1179 tprintf("%#lx", addr);
1182 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
1183 if (current_wordsize != sizeof(sa.sa_flags) && current_wordsize == 4) {
1184 struct new_sigaction32 sa32;
1185 r = umove(tcp, addr, &sa32);
1187 memset(&sa, 0, sizeof(sa));
1188 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1189 sa.sa_flags = sa32.sa_flags;
1191 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1193 /* Kernel treats sa_mask as an array of longs.
1194 * For 32-bit process, "long" is uint32_t, thus, for example,
1195 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1196 * But for (64-bit) kernel, 32th bit in sa_mask is
1197 * 32th bit in 0th (64-bit) long!
1198 * For little-endian, it's the same.
1199 * For big-endian, we swap 32-bit words.
1201 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1206 r = umove(tcp, addr, &sa);
1212 /* Architectures using function pointers, like
1213 * hppa, may need to manipulate the function pointer
1214 * to compute the result of a comparison. However,
1215 * the __sa_handler function pointer exists only in
1216 * the address space of the traced process, and can't
1217 * be manipulated by strace. In order to prevent the
1218 * compiler from generating code to manipulate
1219 * __sa_handler we cast the function pointers to long. */
1220 if ((long)sa.__sa_handler == (long)SIG_ERR)
1221 tprints("{SIG_ERR, ");
1222 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1223 tprints("{SIG_DFL, ");
1224 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1225 tprints("{SIG_IGN, ");
1227 tprintf("{%#lx, ", (long) sa.__sa_handler);
1229 * Sigset size is in tcp->u_arg[4] (SPARC)
1230 * or in tcp->u_arg[3] (all other),
1231 * but kernel won't handle sys_rt_sigaction
1232 * with wrong sigset size (just returns EINVAL instead).
1233 * We just fetch the right size, which is NSIG / 8.
1235 tprintsigmask_val("", sa.sa_mask);
1238 printflags(sigact_flags, sa.sa_flags, "SA_???");
1240 if (sa.sa_flags & SA_RESTORER)
1241 tprintf(", %p", sa.sa_restorer);
1247 sys_rt_sigaction(struct tcb *tcp)
1249 if (entering(tcp)) {
1250 printsignal(tcp->u_arg[0]);
1252 decode_new_sigaction(tcp, tcp->u_arg[1]);
1255 decode_new_sigaction(tcp, tcp->u_arg[2]);
1256 #if defined(SPARC) || defined(SPARC64)
1257 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1258 #elif defined(ALPHA)
1259 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1261 tprintf(", %lu", tcp->u_arg[3]);
1268 sys_rt_sigpending(struct tcb *tcp)
1272 * One of the few syscalls where sigset size (arg[1])
1273 * is allowed to be <= NSIG / 8, not strictly ==.
1274 * This allows non-rt sigpending() syscall
1275 * to reuse rt_sigpending() code in kernel.
1278 tprintf("%#lx", tcp->u_arg[0]);
1280 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1281 tprintf(", %lu", tcp->u_arg[1]);
1287 sys_rt_sigsuspend(struct tcb *tcp)
1289 if (entering(tcp)) {
1290 /* NB: kernel requires arg[1] == NSIG / 8 */
1291 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1292 tprintf(", %lu", tcp->u_arg[1]);
1298 print_sigqueueinfo(struct tcb *tcp, int sig, unsigned long uinfo)
1302 printsiginfo_at(tcp, uinfo);
1306 sys_rt_sigqueueinfo(struct tcb *tcp)
1308 if (entering(tcp)) {
1309 tprintf("%lu, ", tcp->u_arg[0]);
1310 print_sigqueueinfo(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1316 sys_rt_tgsigqueueinfo(struct tcb *tcp)
1318 if (entering(tcp)) {
1319 tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
1320 print_sigqueueinfo(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1325 int sys_rt_sigtimedwait(struct tcb *tcp)
1327 /* NB: kernel requires arg[3] == NSIG / 8 */
1328 if (entering(tcp)) {
1329 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[3]);
1331 /* This is the only "return" parameter, */
1332 if (tcp->u_arg[1] != 0)
1334 /* ... if it's NULL, can decode all on entry */
1337 else if (tcp->u_arg[1] != 0) {
1338 /* syscall exit, and u_arg[1] wasn't NULL */
1339 printsiginfo_at(tcp, tcp->u_arg[1]);
1343 /* syscall exit, and u_arg[1] was NULL */
1346 print_timespec(tcp, tcp->u_arg[2]);
1347 tprintf(", %lu", tcp->u_arg[3]);
1352 sys_restart_syscall(struct tcb *tcp)
1355 tprints("<... resuming interrupted call ...>");
1360 do_signalfd(struct tcb *tcp, int flags_arg)
1362 /* NB: kernel requires arg[2] == NSIG / 8 */
1363 if (entering(tcp)) {
1364 printfd(tcp, tcp->u_arg[0]);
1366 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1367 tprintf(", %lu", tcp->u_arg[2]);
1368 if (flags_arg >= 0) {
1370 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1377 sys_signalfd(struct tcb *tcp)
1379 return do_signalfd(tcp, -1);
1383 sys_signalfd4(struct tcb *tcp)
1385 return do_signalfd(tcp, 3);