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 printsiginfo(siginfo_t *sip, int verbose)
507 if (sip->si_signo == 0) {
511 tprints("{si_signo=");
512 printsignal(sip->si_signo);
513 code = xlookup(siginfo_codes, sip->si_code);
515 switch (sip->si_signo) {
517 code = xlookup(sigtrap_codes, sip->si_code);
520 code = xlookup(sigchld_codes, sip->si_code);
523 code = xlookup(sigpoll_codes, sip->si_code);
526 code = xlookup(sigprof_codes, sip->si_code);
529 code = xlookup(sigill_codes, sip->si_code);
533 code = xlookup(sigemt_codes, sip->si_code);
537 code = xlookup(sigfpe_codes, sip->si_code);
540 code = xlookup(sigsegv_codes, sip->si_code);
543 code = xlookup(sigbus_codes, sip->si_code);
548 tprintf(", si_code=%s", code);
550 tprintf(", si_code=%#x", sip->si_code);
552 if (sip->si_code != SI_NOINFO)
556 if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
557 tprintf(", si_errno=%d", sip->si_errno);
559 tprintf(", si_errno=%s",
560 errnoent[sip->si_errno]);
563 if (SI_FROMUSER(sip)) {
564 tprintf(", si_pid=%lu, si_uid=%lu",
565 (unsigned long) sip->si_pid,
566 (unsigned long) sip->si_uid);
567 switch (sip->si_code) {
578 tprintf(", si_value=%d", sip->si_int);
587 tprintf(", si_value={int=%u, ptr=%#lx}",
589 (unsigned long) sip->si_ptr);
594 #endif /* SI_FROMUSER */
596 switch (sip->si_signo) {
598 tprintf(", si_pid=%ld, si_status=",
600 if (sip->si_code == CLD_EXITED)
601 tprintf("%d", sip->si_status);
603 printsignal(sip->si_status);
607 tprintf(", si_utime=%llu, si_stime=%llu",
608 (unsigned long long) sip->si_utime,
609 (unsigned long long) sip->si_stime);
611 case SIGILL: case SIGFPE:
612 case SIGSEGV: case SIGBUS:
613 tprintf(", si_addr=%#lx",
614 (unsigned long) sip->si_addr);
617 switch (sip->si_code) {
618 case POLL_IN: case POLL_OUT: case POLL_MSG:
619 tprintf(", si_band=%ld",
620 (long) sip->si_band);
625 if (sip->si_pid || sip->si_uid)
626 tprintf(", si_pid=%lu, si_uid=%lu",
627 (unsigned long) sip->si_pid,
628 (unsigned long) sip->si_uid);
634 tprintf(", si_value={int=%u, ptr=%#lx}",
636 (unsigned long) sip->si_ptr);
646 printsiginfo_at(struct tcb *tcp, long addr)
654 tprintf("%#lx", addr);
657 if (umove(tcp, addr, &si) < 0) {
661 printsiginfo(&si, verbose(tcp));
665 sys_sigsetmask(struct tcb *tcp)
668 tprintsigmask_val("", tcp->u_arg[0]);
670 else if (!syserror(tcp)) {
671 tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval);
672 return RVAL_HEX | RVAL_STR;
677 #ifdef HAVE_SIGACTION
679 struct old_sigaction {
680 /* sa_handler may be a libc #define, need to use other name: */
682 unsigned int sa_flags;
683 void (*__sa_handler)(int);
684 /* Kernel treats sa_mask as an array of longs. */
685 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
687 void (*__sa_handler)(int);
688 unsigned long sa_mask;
689 unsigned long sa_flags;
690 void (*sa_restorer)(void);
695 decode_old_sigaction(struct tcb *tcp, long addr)
697 struct old_sigaction sa;
703 if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) {
704 tprintf("%#lx", addr);
707 if (umove(tcp, addr, &sa) < 0) {
712 /* Architectures using function pointers, like
713 * hppa, may need to manipulate the function pointer
714 * to compute the result of a comparison. However,
715 * the __sa_handler function pointer exists only in
716 * the address space of the traced process, and can't
717 * be manipulated by strace. In order to prevent the
718 * compiler from generating code to manipulate
719 * __sa_handler we cast the function pointers to long. */
720 if ((long)sa.__sa_handler == (long)SIG_ERR)
721 tprints("{SIG_ERR, ");
722 else if ((long)sa.__sa_handler == (long)SIG_DFL)
723 tprints("{SIG_DFL, ");
724 else if ((long)sa.__sa_handler == (long)SIG_IGN)
725 tprints("{SIG_IGN, ");
727 tprintf("{%#lx, ", (long) sa.__sa_handler);
729 tprintsigmask_addr("", sa.sa_mask);
731 tprintsigmask_val("", sa.sa_mask);
734 printflags(sigact_flags, sa.sa_flags, "SA_???");
736 if (sa.sa_flags & SA_RESTORER)
737 tprintf(", %p", sa.sa_restorer);
743 sys_sigaction(struct tcb *tcp)
746 printsignal(tcp->u_arg[0]);
748 decode_old_sigaction(tcp, tcp->u_arg[1]);
751 decode_old_sigaction(tcp, tcp->u_arg[2]);
756 sys_signal(struct tcb *tcp)
759 printsignal(tcp->u_arg[0]);
761 switch (tcp->u_arg[1]) {
772 tprintf("%#lx", tcp->u_arg[1]);
776 else if (!syserror(tcp)) {
777 switch (tcp->u_rval) {
779 tcp->auxstr = "SIG_ERR"; break;
781 tcp->auxstr = "SIG_DFL"; break;
783 tcp->auxstr = "SIG_IGN"; break;
787 return RVAL_HEX | RVAL_STR;
792 #endif /* HAVE_SIGACTION */
795 sys_sigreturn(struct tcb *tcp)
799 struct arm_sigcontext {
800 unsigned long trap_no;
801 unsigned long error_code;
802 unsigned long oldmask;
803 unsigned long arm_r0;
804 unsigned long arm_r1;
805 unsigned long arm_r2;
806 unsigned long arm_r3;
807 unsigned long arm_r4;
808 unsigned long arm_r5;
809 unsigned long arm_r6;
810 unsigned long arm_r7;
811 unsigned long arm_r8;
812 unsigned long arm_r9;
813 unsigned long arm_r10;
814 unsigned long arm_fp;
815 unsigned long arm_ip;
816 unsigned long arm_sp;
817 unsigned long arm_lr;
818 unsigned long arm_pc;
819 unsigned long arm_cpsr;
820 unsigned long fault_address;
822 struct arm_ucontext {
823 unsigned long uc_flags;
824 unsigned long uc_link; /* struct ucontext* */
825 /* The next three members comprise stack_t struct: */
826 unsigned long ss_sp; /* void* */
827 unsigned long ss_flags; /* int */
828 unsigned long ss_size; /* size_t */
829 struct arm_sigcontext sc;
830 /* These two members are sigset_t: */
831 unsigned long uc_sigmask[2];
832 /* more fields follow, which we aren't interested in */
834 struct arm_ucontext uc;
835 if (umove(tcp, arm_regs.ARM_sp, &uc) < 0)
838 * Kernel fills out uc.sc.oldmask too when it sets up signal stack,
839 * but for sigmask restore, sigreturn syscall uses uc.uc_sigmask instead.
841 tprintsigmask_addr(") (mask ", uc.uc_sigmask);
843 #elif defined(S390) || defined(S390X)
846 struct sigcontext sc;
847 if (upeek(tcp->pid, PT_GPR15, &usp) < 0)
849 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
851 tprintsigmask_addr(") (mask ", sc.oldmask);
853 #elif defined(I386) || defined(X86_64)
855 if (current_personality == 0) /* 64-bit */
859 struct i386_sigcontext_struct {
877 uint32_t esp_at_signal;
883 struct i386_fpstate {
891 uint8_t st[8][10]; /* 8*10 bytes: FP regs */
894 uint32_t fxsr_env[6];
897 uint8_t stx[8][16]; /* 8*16 bytes: FP regs, each padded to 16 bytes */
898 uint8_t xmm[8][16]; /* 8 XMM regs */
899 uint32_t padding1[44];
900 uint32_t padding2[12]; /* union with struct _fpx_sw_bytes */
903 struct i386_sigcontext_struct sc;
904 struct i386_fpstate fp;
905 uint32_t extramask[1];
907 /* On i386, sc is followed on stack by struct fpstate
908 * and after it an additional u32 extramask[1] which holds
909 * upper half of the mask.
912 if (umove(tcp, *i386_esp_ptr, &signal_stack) < 0)
914 sigmask[0] = signal_stack.sc.oldmask;
915 sigmask[1] = signal_stack.extramask[0];
916 tprintsigmask_addr(") (mask ", sigmask);
920 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)
928 tprintsigmask_val(") (mask ", sc.sc_mask);
930 #elif defined(POWERPC)
933 struct sigcontext sc;
935 esp = ppc_regs.gpr[1];
937 /* Skip dummy stack frame. */
939 if (current_personality == 0)
946 if (umove(tcp, esp, &sc) < 0)
948 tprintsigmask_val(") (mask ", sc.oldmask);
953 struct sigcontext sc;
954 if (upeek(tcp->pid, 4*PT_USP, &usp) < 0)
956 if (umove(tcp, usp, &sc) < 0)
958 tprintsigmask_val(") (mask ", sc.sc_mask);
963 struct sigcontext sc;
964 if (upeek(tcp->pid, REG_FP, &fp) < 0)
966 if (umove(tcp, fp, &sc) < 0)
968 tprintsigmask_val(") (mask ", sc.sc_mask);
970 #elif defined(SPARC) || defined(SPARC64)
974 i1 = sparc_regs.u_regs[U_REG_O1];
975 if (umove(tcp, i1, &si) < 0) {
976 perror_msg("sigreturn: umove");
979 tprintsigmask_val(") (mask ", si.si_mask);
981 #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
982 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
987 if (upeek(tcp->pid, REG_SP, &sp) < 0)
989 /* There are six words followed by a 128-byte siginfo. */
990 sp = sp + 6 * 4 + 128;
991 if (umove(tcp, sp, &uc) < 0)
993 tprintsigmask_val(") (mask ", uc.uc_sigmask);
1000 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1001 perror_msg("sigreturn: PTRACE_GETREGS");
1005 if (umove(tcp, sp, &si) < 0)
1007 tprintsigmask_val(") (mask ", si.si_mask);
1009 #elif defined(CRISV10) || defined(CRISV32)
1010 if (entering(tcp)) {
1011 struct sigcontext sc;
1012 long regs[PT_MAX+1];
1013 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
1014 perror_msg("sigreturn: PTRACE_GETREGS");
1017 if (umove(tcp, regs[PT_USP], &sc) < 0)
1019 tprintsigmask_val(") (mask ", sc.oldmask);
1022 if (entering(tcp)) {
1025 /* offset of ucontext in the kernel's sigframe structure */
1026 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(siginfo_t)
1027 if (umove(tcp, tile_regs.sp + SIGFRAME_UC_OFFSET, &uc) < 0)
1029 tprintsigmask_val(") (mask ", uc.uc_sigmask);
1031 #elif defined(MICROBLAZE)
1032 /* TODO: Verify that this is correct... */
1033 if (entering(tcp)) {
1034 struct sigcontext sc;
1036 /* Read r1, the stack pointer. */
1037 if (upeek(tcp->pid, 1 * 4, &sp) < 0)
1039 if (umove(tcp, sp, &sc) < 0)
1041 tprintsigmask_val(") (mask ", sc.oldmask);
1043 #elif defined(XTENSA)
1044 /* Xtensa only has rt_sys_sigreturn */
1046 /* ARC syscall ABI only supports rt_sys_sigreturn */
1048 # warning No sys_sigreturn() for this architecture
1049 # warning (no problem, just a reminder :-)
1055 sys_siggetmask(struct tcb *tcp)
1058 tcp->auxstr = sprintsigmask_val("mask ", tcp->u_rval);
1060 return RVAL_HEX | RVAL_STR;
1064 sys_sigsuspend(struct tcb *tcp)
1066 if (entering(tcp)) {
1067 tprintsigmask_val("", tcp->u_arg[2]);
1072 #if !defined SS_ONSTACK
1073 #define SS_ONSTACK 1
1074 #define SS_DISABLE 2
1077 static const struct xlat sigaltstack_flags[] = {
1084 print_stack_t(struct tcb *tcp, unsigned long addr)
1094 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
1095 if (current_wordsize != sizeof(ss.ss_sp) && current_wordsize == 4) {
1101 r = umove(tcp, addr, &ss32);
1103 memset(&ss, 0, sizeof(ss));
1104 ss.ss_sp = (void*)(unsigned long) ss32.ss_sp;
1105 ss.ss_flags = ss32.ss_flags;
1106 ss.ss_size = (unsigned long) ss32.ss_size;
1111 r = umove(tcp, addr, &ss);
1114 tprintf("%#lx", addr);
1116 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1117 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1118 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1123 sys_sigaltstack(struct tcb *tcp)
1125 if (entering(tcp)) {
1126 print_stack_t(tcp, tcp->u_arg[0]);
1130 print_stack_t(tcp, tcp->u_arg[1]);
1135 #ifdef HAVE_SIGACTION
1137 /* "Old" sigprocmask, which operates with word-sized signal masks */
1139 sys_sigprocmask(struct tcb *tcp)
1142 if (entering(tcp)) {
1144 * Alpha/OSF is different: it doesn't pass in two pointers,
1145 * but rather passes in the new bitmask as an argument and
1146 * then returns the old bitmask. This "works" because we
1147 * only have 64 signals to worry about. If you want more,
1148 * use of the rt_sigprocmask syscall is required.
1150 * old = osf_sigprocmask(how, new);
1152 * ret = sigprocmask(how, &new, &old, ...);
1154 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1155 tprintsigmask_val(", ", tcp->u_arg[1]);
1157 else if (!syserror(tcp)) {
1158 tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval);
1159 return RVAL_HEX | RVAL_STR;
1162 if (entering(tcp)) {
1163 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1165 print_sigset_addr_len(tcp, tcp->u_arg[1], current_wordsize);
1170 tprintf("%#lx", tcp->u_arg[2]);
1172 print_sigset_addr_len(tcp, tcp->u_arg[2], current_wordsize);
1174 # endif /* !ALPHA */
1178 #endif /* HAVE_SIGACTION */
1181 sys_kill(struct tcb *tcp)
1183 if (entering(tcp)) {
1185 widen_to_long(tcp->u_arg[0]),
1186 signame(tcp->u_arg[1])
1193 sys_tgkill(struct tcb *tcp)
1195 if (entering(tcp)) {
1196 tprintf("%ld, %ld, %s",
1197 widen_to_long(tcp->u_arg[0]),
1198 widen_to_long(tcp->u_arg[1]),
1199 signame(tcp->u_arg[2])
1206 sys_sigpending(struct tcb *tcp)
1210 tprintf("%#lx", tcp->u_arg[0]);
1212 print_sigset_addr_len(tcp, tcp->u_arg[0], current_wordsize);
1218 sys_rt_sigprocmask(struct tcb *tcp)
1220 /* Note: arg[3] is the length of the sigset. Kernel requires NSIG / 8 */
1221 if (entering(tcp)) {
1222 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1224 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[3]);
1229 tprintf("%#lx", tcp->u_arg[2]);
1231 print_sigset_addr_len(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1232 tprintf(", %lu", tcp->u_arg[3]);
1237 /* Structure describing the action to be taken when a signal arrives. */
1238 struct new_sigaction
1240 /* sa_handler may be a libc #define, need to use other name: */
1242 unsigned int sa_flags;
1243 void (*__sa_handler)(int);
1245 void (*__sa_handler)(int);
1246 unsigned long sa_flags;
1247 void (*sa_restorer)(void);
1249 /* Kernel treats sa_mask as an array of longs. */
1250 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1252 /* Same for i386-on-x86_64 and similar cases */
1253 struct new_sigaction32
1255 uint32_t __sa_handler;
1257 uint32_t sa_restorer;
1258 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1262 decode_new_sigaction(struct tcb *tcp, long addr)
1264 struct new_sigaction sa;
1271 if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) {
1272 tprintf("%#lx", addr);
1275 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
1276 if (current_wordsize != sizeof(sa.sa_flags) && current_wordsize == 4) {
1277 struct new_sigaction32 sa32;
1278 r = umove(tcp, addr, &sa32);
1280 memset(&sa, 0, sizeof(sa));
1281 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1282 sa.sa_flags = sa32.sa_flags;
1283 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1284 /* Kernel treats sa_mask as an array of longs.
1285 * For 32-bit process, "long" is uint32_t, thus, for example,
1286 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1287 * But for (64-bit) kernel, 32th bit in sa_mask is
1288 * 32th bit in 0th (64-bit) long!
1289 * For little-endian, it's the same.
1290 * For big-endian, we swap 32-bit words.
1292 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1297 r = umove(tcp, addr, &sa);
1303 /* Architectures using function pointers, like
1304 * hppa, may need to manipulate the function pointer
1305 * to compute the result of a comparison. However,
1306 * the __sa_handler function pointer exists only in
1307 * the address space of the traced process, and can't
1308 * be manipulated by strace. In order to prevent the
1309 * compiler from generating code to manipulate
1310 * __sa_handler we cast the function pointers to long. */
1311 if ((long)sa.__sa_handler == (long)SIG_ERR)
1312 tprints("{SIG_ERR, ");
1313 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1314 tprints("{SIG_DFL, ");
1315 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1316 tprints("{SIG_IGN, ");
1318 tprintf("{%#lx, ", (long) sa.__sa_handler);
1320 * Sigset size is in tcp->u_arg[4] (SPARC)
1321 * or in tcp->u_arg[3] (all other),
1322 * but kernel won't handle sys_rt_sigaction
1323 * with wrong sigset size (just returns EINVAL instead).
1324 * We just fetch the right size, which is NSIG / 8.
1326 tprintsigmask_val("", sa.sa_mask);
1329 printflags(sigact_flags, sa.sa_flags, "SA_???");
1331 if (sa.sa_flags & SA_RESTORER)
1332 tprintf(", %p", sa.sa_restorer);
1338 sys_rt_sigaction(struct tcb *tcp)
1340 if (entering(tcp)) {
1341 printsignal(tcp->u_arg[0]);
1343 decode_new_sigaction(tcp, tcp->u_arg[1]);
1346 decode_new_sigaction(tcp, tcp->u_arg[2]);
1347 #if defined(SPARC) || defined(SPARC64)
1348 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1349 #elif defined(ALPHA)
1350 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1352 tprintf(", %lu", tcp->u_arg[3]);
1359 sys_rt_sigpending(struct tcb *tcp)
1363 * One of the few syscalls where sigset size (arg[1])
1364 * is allowed to be <= NSIG / 8, not strictly ==.
1365 * This allows non-rt sigpending() syscall
1366 * to reuse rt_sigpending() code in kernel.
1369 tprintf("%#lx", tcp->u_arg[0]);
1371 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1372 tprintf(", %lu", tcp->u_arg[1]);
1378 sys_rt_sigsuspend(struct tcb *tcp)
1380 if (entering(tcp)) {
1381 /* NB: kernel requires arg[1] == NSIG / 8 */
1382 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1383 tprintf(", %lu", tcp->u_arg[1]);
1389 print_sigqueueinfo(struct tcb *tcp, int sig, unsigned long uinfo)
1393 printsiginfo_at(tcp, uinfo);
1397 sys_rt_sigqueueinfo(struct tcb *tcp)
1399 if (entering(tcp)) {
1400 tprintf("%lu, ", tcp->u_arg[0]);
1401 print_sigqueueinfo(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1407 sys_rt_tgsigqueueinfo(struct tcb *tcp)
1409 if (entering(tcp)) {
1410 tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
1411 print_sigqueueinfo(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1416 int sys_rt_sigtimedwait(struct tcb *tcp)
1418 /* NB: kernel requires arg[3] == NSIG / 8 */
1419 if (entering(tcp)) {
1420 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[3]);
1422 /* This is the only "return" parameter, */
1423 if (tcp->u_arg[1] != 0)
1425 /* ... if it's NULL, can decode all on entry */
1428 else if (tcp->u_arg[1] != 0) {
1429 /* syscall exit, and u_arg[1] wasn't NULL */
1430 printsiginfo_at(tcp, tcp->u_arg[1]);
1434 /* syscall exit, and u_arg[1] was NULL */
1437 print_timespec(tcp, tcp->u_arg[2]);
1438 tprintf(", %lu", tcp->u_arg[3]);
1443 sys_restart_syscall(struct tcb *tcp)
1446 tprints("<... resuming interrupted call ...>");
1451 do_signalfd(struct tcb *tcp, int flags_arg)
1453 /* NB: kernel requires arg[2] == NSIG / 8 */
1454 if (entering(tcp)) {
1455 printfd(tcp, tcp->u_arg[0]);
1457 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1458 tprintf(", %lu", tcp->u_arg[2]);
1459 if (flags_arg >= 0) {
1461 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1468 sys_signalfd(struct tcb *tcp)
1470 return do_signalfd(tcp, -1);
1474 sys_signalfd4(struct tcb *tcp)
1476 return do_signalfd(tcp, 3);