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) {
458 tprintf(", si_timerid=%#x, si_overrun=%d",
459 sip->si_timerid, sip->si_overrun);
460 printsigval(sip, verbose);
466 printsigval(sip, verbose);
471 #endif /* SI_FROMUSER */
473 switch (sip->si_signo) {
476 tprints(", si_status=");
477 if (sip->si_code == CLD_EXITED)
478 tprintf("%d", sip->si_status);
480 printsignal(sip->si_status);
484 tprintf(", si_utime=%llu, si_stime=%llu",
485 (unsigned long long) sip->si_utime,
486 (unsigned long long) sip->si_stime);
488 case SIGILL: case SIGFPE:
489 case SIGSEGV: case SIGBUS:
490 tprintf(", si_addr=%#lx",
491 (unsigned long) sip->si_addr);
494 switch (sip->si_code) {
495 case POLL_IN: case POLL_OUT: case POLL_MSG:
496 tprintf(", si_band=%ld",
497 (long) sip->si_band);
501 #ifdef HAVE_SIGINFO_T_SI_SYSCALL
503 tprintf(", si_call_addr=%#lx, si_syscall=%d, si_arch=%u",
504 (unsigned long) sip->si_call_addr,
505 sip->si_syscall, sip->si_arch);
509 if (sip->si_pid || sip->si_uid)
512 printsigval(sip, verbose);
520 printsiginfo_at(struct tcb *tcp, long addr)
528 tprintf("%#lx", addr);
531 if (umove(tcp, addr, &si) < 0) {
535 printsiginfo(&si, verbose(tcp));
539 sys_sigsetmask(struct tcb *tcp)
542 tprintsigmask_val("", tcp->u_arg[0]);
544 else if (!syserror(tcp)) {
545 tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval);
546 return RVAL_HEX | RVAL_STR;
551 #ifdef HAVE_SIGACTION
553 struct old_sigaction {
554 /* sa_handler may be a libc #define, need to use other name: */
556 unsigned int sa_flags;
557 void (*__sa_handler)(int);
558 /* Kernel treats sa_mask as an array of longs. */
559 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
561 void (*__sa_handler)(int);
562 unsigned long sa_mask;
563 unsigned long sa_flags;
566 void (*sa_restorer)(void);
570 struct old_sigaction32 {
571 /* sa_handler may be a libc #define, need to use other name: */
572 uint32_t __sa_handler;
576 uint32_t sa_restorer;
581 decode_old_sigaction(struct tcb *tcp, long addr)
583 struct old_sigaction sa;
590 if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) {
591 tprintf("%#lx", addr);
595 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
596 if (current_wordsize != sizeof(sa.__sa_handler) && current_wordsize == 4) {
597 struct old_sigaction32 sa32;
598 r = umove(tcp, addr, &sa32);
600 memset(&sa, 0, sizeof(sa));
601 sa.__sa_handler = (void*)(uintptr_t)sa32.__sa_handler;
602 sa.sa_flags = sa32.sa_flags;
604 sa.sa_restorer = (void*)(uintptr_t)sa32.sa_restorer;
606 sa.sa_mask = sa32.sa_mask;
611 r = umove(tcp, addr, &sa);
618 /* Architectures using function pointers, like
619 * hppa, may need to manipulate the function pointer
620 * to compute the result of a comparison. However,
621 * the __sa_handler function pointer exists only in
622 * the address space of the traced process, and can't
623 * be manipulated by strace. In order to prevent the
624 * compiler from generating code to manipulate
625 * __sa_handler we cast the function pointers to long. */
626 if ((long)sa.__sa_handler == (long)SIG_ERR)
627 tprints("{SIG_ERR, ");
628 else if ((long)sa.__sa_handler == (long)SIG_DFL)
629 tprints("{SIG_DFL, ");
630 else if ((long)sa.__sa_handler == (long)SIG_IGN)
631 tprints("{SIG_IGN, ");
633 tprintf("{%#lx, ", (long) sa.__sa_handler);
635 tprintsigmask_addr("", sa.sa_mask);
637 tprintsigmask_val("", sa.sa_mask);
640 printflags(sigact_flags, sa.sa_flags, "SA_???");
642 if (sa.sa_flags & SA_RESTORER)
643 tprintf(", %p", sa.sa_restorer);
649 sys_sigaction(struct tcb *tcp)
652 printsignal(tcp->u_arg[0]);
654 decode_old_sigaction(tcp, tcp->u_arg[1]);
657 decode_old_sigaction(tcp, tcp->u_arg[2]);
662 sys_signal(struct tcb *tcp)
665 printsignal(tcp->u_arg[0]);
667 switch (tcp->u_arg[1]) {
678 tprintf("%#lx", tcp->u_arg[1]);
682 else if (!syserror(tcp)) {
683 switch (tcp->u_rval) {
685 tcp->auxstr = "SIG_ERR"; break;
687 tcp->auxstr = "SIG_DFL"; break;
689 tcp->auxstr = "SIG_IGN"; break;
693 return RVAL_HEX | RVAL_STR;
698 #endif /* HAVE_SIGACTION */
701 sys_sigreturn(struct tcb *tcp)
705 struct arm_sigcontext {
706 unsigned long trap_no;
707 unsigned long error_code;
708 unsigned long oldmask;
709 unsigned long arm_r0;
710 unsigned long arm_r1;
711 unsigned long arm_r2;
712 unsigned long arm_r3;
713 unsigned long arm_r4;
714 unsigned long arm_r5;
715 unsigned long arm_r6;
716 unsigned long arm_r7;
717 unsigned long arm_r8;
718 unsigned long arm_r9;
719 unsigned long arm_r10;
720 unsigned long arm_fp;
721 unsigned long arm_ip;
722 unsigned long arm_sp;
723 unsigned long arm_lr;
724 unsigned long arm_pc;
725 unsigned long arm_cpsr;
726 unsigned long fault_address;
728 struct arm_ucontext {
729 unsigned long uc_flags;
730 unsigned long uc_link; /* struct ucontext* */
731 /* The next three members comprise stack_t struct: */
732 unsigned long ss_sp; /* void* */
733 unsigned long ss_flags; /* int */
734 unsigned long ss_size; /* size_t */
735 struct arm_sigcontext sc;
736 /* These two members are sigset_t: */
737 unsigned long uc_sigmask[2];
738 /* more fields follow, which we aren't interested in */
740 struct arm_ucontext uc;
741 if (umove(tcp, arm_regs.ARM_sp, &uc) < 0)
744 * Kernel fills out uc.sc.oldmask too when it sets up signal stack,
745 * but for sigmask restore, sigreturn syscall uses uc.uc_sigmask instead.
747 tprintsigmask_addr(") (mask ", uc.uc_sigmask);
749 #elif defined(S390) || defined(S390X)
752 struct sigcontext sc;
753 if (upeek(tcp->pid, PT_GPR15, &usp) < 0)
755 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
757 tprintsigmask_addr(") (mask ", sc.oldmask);
759 #elif defined(I386) || defined(X86_64)
761 if (current_personality == 0) /* 64-bit */
765 struct i386_sigcontext_struct {
783 uint32_t esp_at_signal;
789 struct i386_fpstate {
797 uint8_t st[8][10]; /* 8*10 bytes: FP regs */
800 uint32_t fxsr_env[6];
803 uint8_t stx[8][16]; /* 8*16 bytes: FP regs, each padded to 16 bytes */
804 uint8_t xmm[8][16]; /* 8 XMM regs */
805 uint32_t padding1[44];
806 uint32_t padding2[12]; /* union with struct _fpx_sw_bytes */
809 struct i386_sigcontext_struct sc;
810 struct i386_fpstate fp;
811 uint32_t extramask[1];
813 /* On i386, sc is followed on stack by struct fpstate
814 * and after it an additional u32 extramask[1] which holds
815 * upper half of the mask.
818 if (umove(tcp, *i386_esp_ptr, &signal_stack) < 0)
820 sigmask[0] = signal_stack.sc.oldmask;
821 sigmask[1] = signal_stack.extramask[0];
822 tprintsigmask_addr(") (mask ", sigmask);
826 struct sigcontext sc;
828 /* offset of sigcontext in the kernel's sigframe structure: */
829 # define SIGFRAME_SC_OFFSET 0x90
830 if (upeek(tcp->pid, PT_R12, &sp) < 0)
832 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
834 tprintsigmask_val(") (mask ", sc.sc_mask);
836 #elif defined(POWERPC)
839 struct sigcontext sc;
841 esp = ppc_regs.gpr[1];
843 /* Skip dummy stack frame. */
845 if (current_personality == 0)
852 if (umove(tcp, esp, &sc) < 0)
854 tprintsigmask_val(") (mask ", sc.oldmask);
859 struct sigcontext sc;
860 if (upeek(tcp->pid, 4*PT_USP, &usp) < 0)
862 if (umove(tcp, usp, &sc) < 0)
864 tprintsigmask_val(") (mask ", sc.sc_mask);
869 struct sigcontext sc;
870 if (upeek(tcp->pid, REG_FP, &fp) < 0)
872 if (umove(tcp, fp, &sc) < 0)
874 tprintsigmask_val(") (mask ", sc.sc_mask);
876 #elif defined(SPARC) || defined(SPARC64)
880 i1 = sparc_regs.u_regs[U_REG_O1];
881 if (umove(tcp, i1, &si) < 0) {
882 perror_msg("sigreturn: umove");
885 tprintsigmask_val(") (mask ", si.si_mask);
887 #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
888 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
893 if (upeek(tcp->pid, REG_SP, &sp) < 0)
895 /* There are six words followed by a 128-byte siginfo. */
896 sp = sp + 6 * 4 + 128;
897 if (umove(tcp, sp, &uc) < 0)
899 tprintsigmask_val(") (mask ", uc.uc_sigmask);
906 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
907 perror_msg("sigreturn: PTRACE_GETREGS");
911 if (umove(tcp, sp, &si) < 0)
913 tprintsigmask_val(") (mask ", si.si_mask);
915 #elif defined(CRISV10) || defined(CRISV32)
917 struct sigcontext sc;
919 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
920 perror_msg("sigreturn: PTRACE_GETREGS");
923 if (umove(tcp, regs[PT_USP], &sc) < 0)
925 tprintsigmask_val(") (mask ", sc.oldmask);
931 /* offset of ucontext in the kernel's sigframe structure */
932 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(siginfo_t)
933 if (umove(tcp, tile_regs.sp + SIGFRAME_UC_OFFSET, &uc) < 0)
935 tprintsigmask_val(") (mask ", uc.uc_sigmask);
937 #elif defined(MICROBLAZE)
938 /* TODO: Verify that this is correct... */
940 struct sigcontext sc;
942 /* Read r1, the stack pointer. */
943 if (upeek(tcp->pid, 1 * 4, &sp) < 0)
945 if (umove(tcp, sp, &sc) < 0)
947 tprintsigmask_val(") (mask ", sc.oldmask);
949 #elif defined(XTENSA)
950 /* Xtensa only has rt_sys_sigreturn */
952 /* ARC syscall ABI only supports rt_sys_sigreturn */
954 # warning No sys_sigreturn() for this architecture
955 # warning (no problem, just a reminder :-)
961 sys_siggetmask(struct tcb *tcp)
964 tcp->auxstr = sprintsigmask_val("mask ", tcp->u_rval);
966 return RVAL_HEX | RVAL_STR;
970 sys_sigsuspend(struct tcb *tcp)
973 tprintsigmask_val("", tcp->u_arg[2]);
978 #if !defined SS_ONSTACK
983 #include "xlat/sigaltstack_flags.h"
986 print_stack_t(struct tcb *tcp, unsigned long addr)
996 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
997 if (current_wordsize != sizeof(ss.ss_sp) && current_wordsize == 4) {
1003 r = umove(tcp, addr, &ss32);
1005 memset(&ss, 0, sizeof(ss));
1006 ss.ss_sp = (void*)(unsigned long) ss32.ss_sp;
1007 ss.ss_flags = ss32.ss_flags;
1008 ss.ss_size = (unsigned long) ss32.ss_size;
1013 r = umove(tcp, addr, &ss);
1016 tprintf("%#lx", addr);
1018 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1019 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1020 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1025 sys_sigaltstack(struct tcb *tcp)
1027 if (entering(tcp)) {
1028 print_stack_t(tcp, tcp->u_arg[0]);
1032 print_stack_t(tcp, tcp->u_arg[1]);
1037 #ifdef HAVE_SIGACTION
1039 /* "Old" sigprocmask, which operates with word-sized signal masks */
1041 sys_sigprocmask(struct tcb *tcp)
1044 if (entering(tcp)) {
1046 * Alpha/OSF is different: it doesn't pass in two pointers,
1047 * but rather passes in the new bitmask as an argument and
1048 * then returns the old bitmask. This "works" because we
1049 * only have 64 signals to worry about. If you want more,
1050 * use of the rt_sigprocmask syscall is required.
1052 * old = osf_sigprocmask(how, new);
1054 * ret = sigprocmask(how, &new, &old, ...);
1056 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1057 tprintsigmask_val(", ", tcp->u_arg[1]);
1059 else if (!syserror(tcp)) {
1060 tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval);
1061 return RVAL_HEX | RVAL_STR;
1064 if (entering(tcp)) {
1065 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1067 print_sigset_addr_len(tcp, tcp->u_arg[1], current_wordsize);
1072 tprintf("%#lx", tcp->u_arg[2]);
1074 print_sigset_addr_len(tcp, tcp->u_arg[2], current_wordsize);
1076 # endif /* !ALPHA */
1080 #endif /* HAVE_SIGACTION */
1083 sys_kill(struct tcb *tcp)
1085 if (entering(tcp)) {
1087 widen_to_long(tcp->u_arg[0]),
1088 signame(tcp->u_arg[1])
1095 sys_tgkill(struct tcb *tcp)
1097 if (entering(tcp)) {
1098 tprintf("%ld, %ld, %s",
1099 widen_to_long(tcp->u_arg[0]),
1100 widen_to_long(tcp->u_arg[1]),
1101 signame(tcp->u_arg[2])
1108 sys_sigpending(struct tcb *tcp)
1112 tprintf("%#lx", tcp->u_arg[0]);
1114 print_sigset_addr_len(tcp, tcp->u_arg[0], current_wordsize);
1120 sys_rt_sigprocmask(struct tcb *tcp)
1122 /* Note: arg[3] is the length of the sigset. Kernel requires NSIG / 8 */
1123 if (entering(tcp)) {
1124 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1126 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[3]);
1131 tprintf("%#lx", tcp->u_arg[2]);
1133 print_sigset_addr_len(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1134 tprintf(", %lu", tcp->u_arg[3]);
1139 /* Structure describing the action to be taken when a signal arrives. */
1140 struct new_sigaction
1142 /* sa_handler may be a libc #define, need to use other name: */
1144 unsigned int sa_flags;
1145 void (*__sa_handler)(int);
1147 void (*__sa_handler)(int);
1148 unsigned long sa_flags;
1151 void (*sa_restorer)(void);
1153 /* Kernel treats sa_mask as an array of longs. */
1154 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1156 /* Same for i386-on-x86_64 and similar cases */
1157 struct new_sigaction32
1159 uint32_t __sa_handler;
1162 uint32_t sa_restorer;
1164 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1168 decode_new_sigaction(struct tcb *tcp, long addr)
1170 struct new_sigaction sa;
1177 if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) {
1178 tprintf("%#lx", addr);
1181 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
1182 if (current_wordsize != sizeof(sa.sa_flags) && current_wordsize == 4) {
1183 struct new_sigaction32 sa32;
1184 r = umove(tcp, addr, &sa32);
1186 memset(&sa, 0, sizeof(sa));
1187 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1188 sa.sa_flags = sa32.sa_flags;
1190 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1192 /* Kernel treats sa_mask as an array of longs.
1193 * For 32-bit process, "long" is uint32_t, thus, for example,
1194 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1195 * But for (64-bit) kernel, 32th bit in sa_mask is
1196 * 32th bit in 0th (64-bit) long!
1197 * For little-endian, it's the same.
1198 * For big-endian, we swap 32-bit words.
1200 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1205 r = umove(tcp, addr, &sa);
1211 /* Architectures using function pointers, like
1212 * hppa, may need to manipulate the function pointer
1213 * to compute the result of a comparison. However,
1214 * the __sa_handler function pointer exists only in
1215 * the address space of the traced process, and can't
1216 * be manipulated by strace. In order to prevent the
1217 * compiler from generating code to manipulate
1218 * __sa_handler we cast the function pointers to long. */
1219 if ((long)sa.__sa_handler == (long)SIG_ERR)
1220 tprints("{SIG_ERR, ");
1221 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1222 tprints("{SIG_DFL, ");
1223 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1224 tprints("{SIG_IGN, ");
1226 tprintf("{%#lx, ", (long) sa.__sa_handler);
1228 * Sigset size is in tcp->u_arg[4] (SPARC)
1229 * or in tcp->u_arg[3] (all other),
1230 * but kernel won't handle sys_rt_sigaction
1231 * with wrong sigset size (just returns EINVAL instead).
1232 * We just fetch the right size, which is NSIG / 8.
1234 tprintsigmask_val("", sa.sa_mask);
1237 printflags(sigact_flags, sa.sa_flags, "SA_???");
1239 if (sa.sa_flags & SA_RESTORER)
1240 tprintf(", %p", sa.sa_restorer);
1246 sys_rt_sigaction(struct tcb *tcp)
1248 if (entering(tcp)) {
1249 printsignal(tcp->u_arg[0]);
1251 decode_new_sigaction(tcp, tcp->u_arg[1]);
1254 decode_new_sigaction(tcp, tcp->u_arg[2]);
1255 #if defined(SPARC) || defined(SPARC64)
1256 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1257 #elif defined(ALPHA)
1258 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1260 tprintf(", %lu", tcp->u_arg[3]);
1267 sys_rt_sigpending(struct tcb *tcp)
1271 * One of the few syscalls where sigset size (arg[1])
1272 * is allowed to be <= NSIG / 8, not strictly ==.
1273 * This allows non-rt sigpending() syscall
1274 * to reuse rt_sigpending() code in kernel.
1277 tprintf("%#lx", tcp->u_arg[0]);
1279 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1280 tprintf(", %lu", tcp->u_arg[1]);
1286 sys_rt_sigsuspend(struct tcb *tcp)
1288 if (entering(tcp)) {
1289 /* NB: kernel requires arg[1] == NSIG / 8 */
1290 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1291 tprintf(", %lu", tcp->u_arg[1]);
1297 print_sigqueueinfo(struct tcb *tcp, int sig, unsigned long uinfo)
1301 printsiginfo_at(tcp, uinfo);
1305 sys_rt_sigqueueinfo(struct tcb *tcp)
1307 if (entering(tcp)) {
1308 tprintf("%lu, ", tcp->u_arg[0]);
1309 print_sigqueueinfo(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1315 sys_rt_tgsigqueueinfo(struct tcb *tcp)
1317 if (entering(tcp)) {
1318 tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
1319 print_sigqueueinfo(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1324 int sys_rt_sigtimedwait(struct tcb *tcp)
1326 /* NB: kernel requires arg[3] == NSIG / 8 */
1327 if (entering(tcp)) {
1328 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[3]);
1330 /* This is the only "return" parameter, */
1331 if (tcp->u_arg[1] != 0)
1333 /* ... if it's NULL, can decode all on entry */
1336 else if (tcp->u_arg[1] != 0) {
1337 /* syscall exit, and u_arg[1] wasn't NULL */
1338 printsiginfo_at(tcp, tcp->u_arg[1]);
1342 /* syscall exit, and u_arg[1] was NULL */
1345 print_timespec(tcp, tcp->u_arg[2]);
1346 tprintf(", %lu", tcp->u_arg[3]);
1351 sys_restart_syscall(struct tcb *tcp)
1354 tprints("<... resuming interrupted call ...>");
1359 do_signalfd(struct tcb *tcp, int flags_arg)
1361 /* NB: kernel requires arg[2] == NSIG / 8 */
1362 if (entering(tcp)) {
1363 printfd(tcp, tcp->u_arg[0]);
1365 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1366 tprintf(", %lu", tcp->u_arg[2]);
1367 if (flags_arg >= 0) {
1369 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1376 sys_signalfd(struct tcb *tcp)
1378 return do_signalfd(tcp, -1);
1382 sys_signalfd4(struct tcb *tcp)
1384 return do_signalfd(tcp, 3);