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 #include "xlat/sigact_flags.h"
104 #include "xlat/sigprocmaskcmds.h"
106 #endif /* HAVE_SIGACTION */
108 /* Anonymous realtime signals. */
109 /* Under glibc 2.1, SIGRTMIN et al are functions, but __SIGRTMIN is a
110 constant. This is what we want. Otherwise, just use SIGRTMIN. */
113 #define __SIGRTMIN SIGRTMIN
114 #define __SIGRTMAX SIGRTMAX /* likewise */
118 /* Note on the size of sigset_t:
120 * In glibc, sigset_t is an array with space for 1024 bits (!),
121 * even though all arches supported by Linux have only 64 signals
122 * except MIPS, which has 128. IOW, it is 128 bytes long.
124 * In-kernel sigset_t is sized correctly (it is either 64 or 128 bit long).
125 * However, some old syscall return only 32 lower bits (one word).
126 * Example: sys_sigpending vs sys_rt_sigpending.
128 * Be aware of this fact when you try to
129 * memcpy(&tcp->u_arg[1], &something, sizeof(sigset_t))
130 * - sizeof(sigset_t) is much bigger than you think,
131 * it may overflow tcp->u_arg[] array, and it may try to copy more data
132 * than is really available in <something>.
134 * umoven(tcp, addr, sizeof(sigset_t), &sigset)
135 * may be a bad idea: it'll try to read much more data than needed
136 * to fetch a sigset_t.
137 * Use (NSIG / 8) as a size instead.
143 static char buf[sizeof("SIGRT_%d") + sizeof(int)*3];
145 if (sig >= 0 && sig < nsignals)
146 return signalent[sig];
148 if (sig >= __SIGRTMIN && sig <= __SIGRTMAX) {
149 sprintf(buf, "SIGRT_%d", (int)(sig - __SIGRTMIN));
153 sprintf(buf, "%d", sig);
158 popcount32(const uint32_t *a, unsigned int size)
160 unsigned int count = 0;
162 for (; size; ++a, --size) {
165 #ifdef HAVE___BUILTIN_POPCOUNT
166 count += __builtin_popcount(x);
177 sprintsigmask_n(const char *prefix, const void *sig_mask, unsigned int bytes)
180 * The maximum number of signal names to be printed is NSIG * 2 / 3.
181 * Most of signal names have length 7,
182 * average length of signal names is less than 7.
183 * The length of prefix string does not exceed 16.
185 static char outstr[128 + 8 * (NSIG * 2 / 3)];
188 const uint32_t *mask;
189 uint32_t inverted_mask[NSIG / 32];
194 s = stpcpy(outstr, prefix);
197 /* length of signal mask in 4-byte words */
198 size = (bytes >= NSIG / 8) ? NSIG / 32 : (bytes + 3) / 4;
200 /* check whether 2/3 or more bits are set */
201 if (popcount32(mask, size) >= size * 32 * 2 / 3) {
202 /* show those signals that are NOT in the mask */
204 for (j = 0; j < size; ++j)
205 inverted_mask[j] = ~mask[j];
206 mask = inverted_mask;
211 for (i = 0; (i = next_set_bit(mask, i, size * 32)) >= 0; ) {
215 s = stpcpy(s, signalent[i] + 3);
218 else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
219 s += sprintf(s, "RT_%u", i - __SIGRTMIN);
223 s += sprintf(s, "%u", i);
234 #define tprintsigmask_addr(prefix, mask) \
235 tprints(sprintsigmask_n((prefix), (mask), sizeof(mask)))
237 #define sprintsigmask_val(prefix, mask) \
238 sprintsigmask_n((prefix), &(mask), sizeof(mask))
240 #define tprintsigmask_val(prefix, mask) \
241 tprints(sprintsigmask_n((prefix), &(mask), sizeof(mask)))
246 tprints(signame(nr));
250 print_sigset_addr_len(struct tcb *tcp, long addr, long len)
258 /* Here len is usually equals NSIG / 8 or current_wordsize.
259 * But we code this defensively:
263 tprintf("%#lx", addr);
269 len = (len + 3) & ~3;
271 if (umoven(tcp, addr, len, mask) < 0)
273 tprints(sprintsigmask_n("", mask, len));
277 #define ILL_ILLOPC 1 /* illegal opcode */
278 #define ILL_ILLOPN 2 /* illegal operand */
279 #define ILL_ILLADR 3 /* illegal addressing mode */
280 #define ILL_ILLTRP 4 /* illegal trap */
281 #define ILL_PRVOPC 5 /* privileged opcode */
282 #define ILL_PRVREG 6 /* privileged register */
283 #define ILL_COPROC 7 /* coprocessor error */
284 #define ILL_BADSTK 8 /* internal stack error */
285 #define FPE_INTDIV 1 /* integer divide by zero */
286 #define FPE_INTOVF 2 /* integer overflow */
287 #define FPE_FLTDIV 3 /* floating point divide by zero */
288 #define FPE_FLTOVF 4 /* floating point overflow */
289 #define FPE_FLTUND 5 /* floating point underflow */
290 #define FPE_FLTRES 6 /* floating point inexact result */
291 #define FPE_FLTINV 7 /* floating point invalid operation */
292 #define FPE_FLTSUB 8 /* subscript out of range */
293 #define SEGV_MAPERR 1 /* address not mapped to object */
294 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */
295 #define BUS_ADRALN 1 /* invalid address alignment */
296 #define BUS_ADRERR 2 /* non-existant physical address */
297 #define BUS_OBJERR 3 /* object specific hardware error */
298 #define SYS_SECCOMP 1 /* seccomp triggered */
299 #define TRAP_BRKPT 1 /* process breakpoint */
300 #define TRAP_TRACE 2 /* process trace trap */
301 #define CLD_EXITED 1 /* child has exited */
302 #define CLD_KILLED 2 /* child was killed */
303 #define CLD_DUMPED 3 /* child terminated abnormally */
304 #define CLD_TRAPPED 4 /* traced child has trapped */
305 #define CLD_STOPPED 5 /* child has stopped */
306 #define CLD_CONTINUED 6 /* stopped child has continued */
307 #define POLL_IN 1 /* data input available */
308 #define POLL_OUT 2 /* output buffers available */
309 #define POLL_MSG 3 /* input message available */
310 #define POLL_ERR 4 /* i/o error */
311 #define POLL_PRI 5 /* high priority input available */
312 #define POLL_HUP 6 /* device disconnected */
313 #define SI_KERNEL 0x80 /* sent by kernel */
314 #define SI_USER 0 /* sent by kill, sigsend, raise */
315 #define SI_QUEUE -1 /* sent by sigqueue */
316 #define SI_TIMER -2 /* sent by timer expiration */
317 #define SI_MESGQ -3 /* sent by real time mesq state change */
318 #define SI_ASYNCIO -4 /* sent by AIO completion */
319 #define SI_SIGIO -5 /* sent by SIGIO */
320 #define SI_TKILL -6 /* sent by tkill */
321 #define SI_DETHREAD -7 /* sent by execve killing subsidiary threads */
322 #define SI_ASYNCNL -60 /* sent by asynch name lookup completion */
326 # define SI_FROMUSER(sip) ((sip)->si_code <= 0)
329 #include "xlat/siginfo_codes.h"
330 #include "xlat/sigill_codes.h"
331 #include "xlat/sigfpe_codes.h"
332 #include "xlat/sigtrap_codes.h"
333 #include "xlat/sigchld_codes.h"
334 #include "xlat/sigpoll_codes.h"
335 #include "xlat/sigprof_codes.h"
338 #include "xlat/sigemt_codes.h"
341 #include "xlat/sigsegv_codes.h"
342 #include "xlat/sigbus_codes.h"
345 # define SYS_SECCOMP 1
347 #include "xlat/sigsys_codes.h"
350 printsigsource(const siginfo_t *sip)
352 tprintf(", si_pid=%lu, si_uid=%lu",
353 (unsigned long) sip->si_pid,
354 (unsigned long) sip->si_uid);
358 printsigval(const siginfo_t *sip, int verbose)
363 tprintf(", si_value={int=%u, ptr=%#lx}",
365 (unsigned long) sip->si_ptr);
369 printsiginfo(siginfo_t *sip, int verbose)
373 if (sip->si_signo == 0) {
377 tprints("{si_signo=");
378 printsignal(sip->si_signo);
379 code = xlookup(siginfo_codes, sip->si_code);
381 switch (sip->si_signo) {
383 code = xlookup(sigtrap_codes, sip->si_code);
386 code = xlookup(sigchld_codes, sip->si_code);
389 code = xlookup(sigpoll_codes, sip->si_code);
392 code = xlookup(sigprof_codes, sip->si_code);
395 code = xlookup(sigill_codes, sip->si_code);
399 code = xlookup(sigemt_codes, sip->si_code);
403 code = xlookup(sigfpe_codes, sip->si_code);
406 code = xlookup(sigsegv_codes, sip->si_code);
409 code = xlookup(sigbus_codes, sip->si_code);
412 code = xlookup(sigsys_codes, sip->si_code);
417 tprintf(", si_code=%s", code);
419 tprintf(", si_code=%#x", sip->si_code);
421 if (sip->si_code != SI_NOINFO)
425 if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
426 tprintf(", si_errno=%d", sip->si_errno);
428 tprintf(", si_errno=%s",
429 errnoent[sip->si_errno]);
432 if (SI_FROMUSER(sip)) {
433 switch (sip->si_code) {
446 tprintf(", si_timerid=%#x, si_overrun=%d",
447 sip->si_timerid, sip->si_overrun);
448 printsigval(sip, verbose);
454 printsigval(sip, verbose);
459 #endif /* SI_FROMUSER */
461 switch (sip->si_signo) {
464 tprints(", si_status=");
465 if (sip->si_code == CLD_EXITED)
466 tprintf("%d", sip->si_status);
468 printsignal(sip->si_status);
472 tprintf(", si_utime=%llu, si_stime=%llu",
473 (unsigned long long) sip->si_utime,
474 (unsigned long long) sip->si_stime);
476 case SIGILL: case SIGFPE:
477 case SIGSEGV: case SIGBUS:
478 tprintf(", si_addr=%#lx",
479 (unsigned long) sip->si_addr);
482 switch (sip->si_code) {
483 case POLL_IN: case POLL_OUT: case POLL_MSG:
484 tprintf(", si_band=%ld",
485 (long) sip->si_band);
489 #ifdef HAVE_SIGINFO_T_SI_SYSCALL
491 tprintf(", si_call_addr=%#lx, si_syscall=%d, si_arch=%u",
492 (unsigned long) sip->si_call_addr,
493 sip->si_syscall, sip->si_arch);
497 if (sip->si_pid || sip->si_uid)
500 printsigval(sip, verbose);
508 printsiginfo_at(struct tcb *tcp, long addr)
516 tprintf("%#lx", addr);
519 if (umove(tcp, addr, &si) < 0) {
523 printsiginfo(&si, verbose(tcp));
527 sys_sigsetmask(struct tcb *tcp)
530 tprintsigmask_val("", tcp->u_arg[0]);
532 else if (!syserror(tcp)) {
533 tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval);
534 return RVAL_HEX | RVAL_STR;
539 #ifdef HAVE_SIGACTION
541 struct old_sigaction {
542 /* sa_handler may be a libc #define, need to use other name: */
544 unsigned int sa_flags;
545 void (*__sa_handler)(int);
546 /* Kernel treats sa_mask as an array of longs. */
547 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
549 void (*__sa_handler)(int);
550 unsigned long sa_mask;
551 unsigned long sa_flags;
552 void (*sa_restorer)(void);
556 struct old_sigaction32 {
557 /* sa_handler may be a libc #define, need to use other name: */
558 uint32_t __sa_handler;
561 uint32_t sa_restorer;
565 decode_old_sigaction(struct tcb *tcp, long addr)
567 struct old_sigaction sa;
574 if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) {
575 tprintf("%#lx", addr);
579 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
580 if (current_wordsize != sizeof(sa.__sa_handler) && current_wordsize == 4) {
581 struct old_sigaction32 sa32;
582 r = umove(tcp, addr, &sa32);
584 memset(&sa, 0, sizeof(sa));
585 sa.__sa_handler = (void*)(uintptr_t)sa32.__sa_handler;
586 sa.sa_flags = sa32.sa_flags;
587 sa.sa_restorer = (void*)(uintptr_t)sa32.sa_restorer;
588 sa.sa_mask = sa32.sa_mask;
593 r = umove(tcp, addr, &sa);
600 /* Architectures using function pointers, like
601 * hppa, may need to manipulate the function pointer
602 * to compute the result of a comparison. However,
603 * the __sa_handler function pointer exists only in
604 * the address space of the traced process, and can't
605 * be manipulated by strace. In order to prevent the
606 * compiler from generating code to manipulate
607 * __sa_handler we cast the function pointers to long. */
608 if ((long)sa.__sa_handler == (long)SIG_ERR)
609 tprints("{SIG_ERR, ");
610 else if ((long)sa.__sa_handler == (long)SIG_DFL)
611 tprints("{SIG_DFL, ");
612 else if ((long)sa.__sa_handler == (long)SIG_IGN)
613 tprints("{SIG_IGN, ");
615 tprintf("{%#lx, ", (long) sa.__sa_handler);
617 tprintsigmask_addr("", sa.sa_mask);
619 tprintsigmask_val("", sa.sa_mask);
622 printflags(sigact_flags, sa.sa_flags, "SA_???");
624 if (sa.sa_flags & SA_RESTORER)
625 tprintf(", %p", sa.sa_restorer);
631 sys_sigaction(struct tcb *tcp)
634 printsignal(tcp->u_arg[0]);
636 decode_old_sigaction(tcp, tcp->u_arg[1]);
639 decode_old_sigaction(tcp, tcp->u_arg[2]);
644 sys_signal(struct tcb *tcp)
647 printsignal(tcp->u_arg[0]);
649 switch (tcp->u_arg[1]) {
660 tprintf("%#lx", tcp->u_arg[1]);
664 else if (!syserror(tcp)) {
665 switch (tcp->u_rval) {
667 tcp->auxstr = "SIG_ERR"; break;
669 tcp->auxstr = "SIG_DFL"; break;
671 tcp->auxstr = "SIG_IGN"; break;
675 return RVAL_HEX | RVAL_STR;
680 #endif /* HAVE_SIGACTION */
683 sys_sigreturn(struct tcb *tcp)
687 struct arm_sigcontext {
688 unsigned long trap_no;
689 unsigned long error_code;
690 unsigned long oldmask;
691 unsigned long arm_r0;
692 unsigned long arm_r1;
693 unsigned long arm_r2;
694 unsigned long arm_r3;
695 unsigned long arm_r4;
696 unsigned long arm_r5;
697 unsigned long arm_r6;
698 unsigned long arm_r7;
699 unsigned long arm_r8;
700 unsigned long arm_r9;
701 unsigned long arm_r10;
702 unsigned long arm_fp;
703 unsigned long arm_ip;
704 unsigned long arm_sp;
705 unsigned long arm_lr;
706 unsigned long arm_pc;
707 unsigned long arm_cpsr;
708 unsigned long fault_address;
710 struct arm_ucontext {
711 unsigned long uc_flags;
712 unsigned long uc_link; /* struct ucontext* */
713 /* The next three members comprise stack_t struct: */
714 unsigned long ss_sp; /* void* */
715 unsigned long ss_flags; /* int */
716 unsigned long ss_size; /* size_t */
717 struct arm_sigcontext sc;
718 /* These two members are sigset_t: */
719 unsigned long uc_sigmask[2];
720 /* more fields follow, which we aren't interested in */
722 struct arm_ucontext uc;
723 if (umove(tcp, arm_regs.ARM_sp, &uc) < 0)
726 * Kernel fills out uc.sc.oldmask too when it sets up signal stack,
727 * but for sigmask restore, sigreturn syscall uses uc.uc_sigmask instead.
729 tprintsigmask_addr(") (mask ", uc.uc_sigmask);
731 #elif defined(S390) || defined(S390X)
734 struct sigcontext sc;
735 if (upeek(tcp->pid, PT_GPR15, &usp) < 0)
737 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
739 tprintsigmask_addr(") (mask ", sc.oldmask);
741 #elif defined(I386) || defined(X86_64)
743 if (current_personality == 0) /* 64-bit */
747 struct i386_sigcontext_struct {
765 uint32_t esp_at_signal;
771 struct i386_fpstate {
779 uint8_t st[8][10]; /* 8*10 bytes: FP regs */
782 uint32_t fxsr_env[6];
785 uint8_t stx[8][16]; /* 8*16 bytes: FP regs, each padded to 16 bytes */
786 uint8_t xmm[8][16]; /* 8 XMM regs */
787 uint32_t padding1[44];
788 uint32_t padding2[12]; /* union with struct _fpx_sw_bytes */
791 struct i386_sigcontext_struct sc;
792 struct i386_fpstate fp;
793 uint32_t extramask[1];
795 /* On i386, sc is followed on stack by struct fpstate
796 * and after it an additional u32 extramask[1] which holds
797 * upper half of the mask.
800 if (umove(tcp, *i386_esp_ptr, &signal_stack) < 0)
802 sigmask[0] = signal_stack.sc.oldmask;
803 sigmask[1] = signal_stack.extramask[0];
804 tprintsigmask_addr(") (mask ", sigmask);
808 struct sigcontext sc;
810 /* offset of sigcontext in the kernel's sigframe structure: */
811 # define SIGFRAME_SC_OFFSET 0x90
812 if (upeek(tcp->pid, PT_R12, &sp) < 0)
814 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
816 tprintsigmask_val(") (mask ", sc.sc_mask);
818 #elif defined(POWERPC)
821 struct sigcontext sc;
823 esp = ppc_regs.gpr[1];
825 /* Skip dummy stack frame. */
827 if (current_personality == 0)
834 if (umove(tcp, esp, &sc) < 0)
836 tprintsigmask_val(") (mask ", sc.oldmask);
841 struct sigcontext sc;
842 if (upeek(tcp->pid, 4*PT_USP, &usp) < 0)
844 if (umove(tcp, usp, &sc) < 0)
846 tprintsigmask_val(") (mask ", sc.sc_mask);
851 struct sigcontext sc;
852 if (upeek(tcp->pid, REG_FP, &fp) < 0)
854 if (umove(tcp, fp, &sc) < 0)
856 tprintsigmask_val(") (mask ", sc.sc_mask);
858 #elif defined(SPARC) || defined(SPARC64)
862 i1 = sparc_regs.u_regs[U_REG_O1];
863 if (umove(tcp, i1, &si) < 0) {
864 perror_msg("sigreturn: umove");
867 tprintsigmask_val(") (mask ", si.si_mask);
869 #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
870 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
875 if (upeek(tcp->pid, REG_SP, &sp) < 0)
877 /* There are six words followed by a 128-byte siginfo. */
878 sp = sp + 6 * 4 + 128;
879 if (umove(tcp, sp, &uc) < 0)
881 tprintsigmask_val(") (mask ", uc.uc_sigmask);
888 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
889 perror_msg("sigreturn: PTRACE_GETREGS");
893 if (umove(tcp, sp, &si) < 0)
895 tprintsigmask_val(") (mask ", si.si_mask);
897 #elif defined(CRISV10) || defined(CRISV32)
899 struct sigcontext sc;
901 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
902 perror_msg("sigreturn: PTRACE_GETREGS");
905 if (umove(tcp, regs[PT_USP], &sc) < 0)
907 tprintsigmask_val(") (mask ", sc.oldmask);
913 /* offset of ucontext in the kernel's sigframe structure */
914 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(siginfo_t)
915 if (umove(tcp, tile_regs.sp + SIGFRAME_UC_OFFSET, &uc) < 0)
917 tprintsigmask_val(") (mask ", uc.uc_sigmask);
919 #elif defined(MICROBLAZE)
920 /* TODO: Verify that this is correct... */
922 struct sigcontext sc;
924 /* Read r1, the stack pointer. */
925 if (upeek(tcp->pid, 1 * 4, &sp) < 0)
927 if (umove(tcp, sp, &sc) < 0)
929 tprintsigmask_val(") (mask ", sc.oldmask);
931 #elif defined(XTENSA)
932 /* Xtensa only has rt_sys_sigreturn */
934 /* ARC syscall ABI only supports rt_sys_sigreturn */
936 # warning No sys_sigreturn() for this architecture
937 # warning (no problem, just a reminder :-)
943 sys_siggetmask(struct tcb *tcp)
946 tcp->auxstr = sprintsigmask_val("mask ", tcp->u_rval);
948 return RVAL_HEX | RVAL_STR;
952 sys_sigsuspend(struct tcb *tcp)
955 tprintsigmask_val("", tcp->u_arg[2]);
960 #if !defined SS_ONSTACK
965 #include "xlat/sigaltstack_flags.h"
968 print_stack_t(struct tcb *tcp, unsigned long addr)
978 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
979 if (current_wordsize != sizeof(ss.ss_sp) && current_wordsize == 4) {
985 r = umove(tcp, addr, &ss32);
987 memset(&ss, 0, sizeof(ss));
988 ss.ss_sp = (void*)(unsigned long) ss32.ss_sp;
989 ss.ss_flags = ss32.ss_flags;
990 ss.ss_size = (unsigned long) ss32.ss_size;
995 r = umove(tcp, addr, &ss);
998 tprintf("%#lx", addr);
1000 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1001 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1002 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1007 sys_sigaltstack(struct tcb *tcp)
1009 if (entering(tcp)) {
1010 print_stack_t(tcp, tcp->u_arg[0]);
1014 print_stack_t(tcp, tcp->u_arg[1]);
1019 #ifdef HAVE_SIGACTION
1021 /* "Old" sigprocmask, which operates with word-sized signal masks */
1023 sys_sigprocmask(struct tcb *tcp)
1026 if (entering(tcp)) {
1028 * Alpha/OSF is different: it doesn't pass in two pointers,
1029 * but rather passes in the new bitmask as an argument and
1030 * then returns the old bitmask. This "works" because we
1031 * only have 64 signals to worry about. If you want more,
1032 * use of the rt_sigprocmask syscall is required.
1034 * old = osf_sigprocmask(how, new);
1036 * ret = sigprocmask(how, &new, &old, ...);
1038 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1039 tprintsigmask_val(", ", tcp->u_arg[1]);
1041 else if (!syserror(tcp)) {
1042 tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval);
1043 return RVAL_HEX | RVAL_STR;
1046 if (entering(tcp)) {
1047 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1049 print_sigset_addr_len(tcp, tcp->u_arg[1], current_wordsize);
1054 tprintf("%#lx", tcp->u_arg[2]);
1056 print_sigset_addr_len(tcp, tcp->u_arg[2], current_wordsize);
1058 # endif /* !ALPHA */
1062 #endif /* HAVE_SIGACTION */
1065 sys_kill(struct tcb *tcp)
1067 if (entering(tcp)) {
1069 widen_to_long(tcp->u_arg[0]),
1070 signame(tcp->u_arg[1])
1077 sys_tgkill(struct tcb *tcp)
1079 if (entering(tcp)) {
1080 tprintf("%ld, %ld, %s",
1081 widen_to_long(tcp->u_arg[0]),
1082 widen_to_long(tcp->u_arg[1]),
1083 signame(tcp->u_arg[2])
1090 sys_sigpending(struct tcb *tcp)
1094 tprintf("%#lx", tcp->u_arg[0]);
1096 print_sigset_addr_len(tcp, tcp->u_arg[0], current_wordsize);
1102 sys_rt_sigprocmask(struct tcb *tcp)
1104 /* Note: arg[3] is the length of the sigset. Kernel requires NSIG / 8 */
1105 if (entering(tcp)) {
1106 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1108 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[3]);
1113 tprintf("%#lx", tcp->u_arg[2]);
1115 print_sigset_addr_len(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1116 tprintf(", %lu", tcp->u_arg[3]);
1121 /* Structure describing the action to be taken when a signal arrives. */
1122 struct new_sigaction
1124 /* sa_handler may be a libc #define, need to use other name: */
1126 unsigned int sa_flags;
1127 void (*__sa_handler)(int);
1129 void (*__sa_handler)(int);
1130 unsigned long sa_flags;
1131 void (*sa_restorer)(void);
1133 /* Kernel treats sa_mask as an array of longs. */
1134 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1136 /* Same for i386-on-x86_64 and similar cases */
1137 struct new_sigaction32
1139 uint32_t __sa_handler;
1141 uint32_t sa_restorer;
1142 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1146 decode_new_sigaction(struct tcb *tcp, long addr)
1148 struct new_sigaction sa;
1155 if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) {
1156 tprintf("%#lx", addr);
1159 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
1160 if (current_wordsize != sizeof(sa.sa_flags) && current_wordsize == 4) {
1161 struct new_sigaction32 sa32;
1162 r = umove(tcp, addr, &sa32);
1164 memset(&sa, 0, sizeof(sa));
1165 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1166 sa.sa_flags = sa32.sa_flags;
1167 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1168 /* Kernel treats sa_mask as an array of longs.
1169 * For 32-bit process, "long" is uint32_t, thus, for example,
1170 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1171 * But for (64-bit) kernel, 32th bit in sa_mask is
1172 * 32th bit in 0th (64-bit) long!
1173 * For little-endian, it's the same.
1174 * For big-endian, we swap 32-bit words.
1176 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1181 r = umove(tcp, addr, &sa);
1187 /* Architectures using function pointers, like
1188 * hppa, may need to manipulate the function pointer
1189 * to compute the result of a comparison. However,
1190 * the __sa_handler function pointer exists only in
1191 * the address space of the traced process, and can't
1192 * be manipulated by strace. In order to prevent the
1193 * compiler from generating code to manipulate
1194 * __sa_handler we cast the function pointers to long. */
1195 if ((long)sa.__sa_handler == (long)SIG_ERR)
1196 tprints("{SIG_ERR, ");
1197 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1198 tprints("{SIG_DFL, ");
1199 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1200 tprints("{SIG_IGN, ");
1202 tprintf("{%#lx, ", (long) sa.__sa_handler);
1204 * Sigset size is in tcp->u_arg[4] (SPARC)
1205 * or in tcp->u_arg[3] (all other),
1206 * but kernel won't handle sys_rt_sigaction
1207 * with wrong sigset size (just returns EINVAL instead).
1208 * We just fetch the right size, which is NSIG / 8.
1210 tprintsigmask_val("", sa.sa_mask);
1213 printflags(sigact_flags, sa.sa_flags, "SA_???");
1215 if (sa.sa_flags & SA_RESTORER)
1216 tprintf(", %p", sa.sa_restorer);
1222 sys_rt_sigaction(struct tcb *tcp)
1224 if (entering(tcp)) {
1225 printsignal(tcp->u_arg[0]);
1227 decode_new_sigaction(tcp, tcp->u_arg[1]);
1230 decode_new_sigaction(tcp, tcp->u_arg[2]);
1231 #if defined(SPARC) || defined(SPARC64)
1232 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1233 #elif defined(ALPHA)
1234 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1236 tprintf(", %lu", tcp->u_arg[3]);
1243 sys_rt_sigpending(struct tcb *tcp)
1247 * One of the few syscalls where sigset size (arg[1])
1248 * is allowed to be <= NSIG / 8, not strictly ==.
1249 * This allows non-rt sigpending() syscall
1250 * to reuse rt_sigpending() code in kernel.
1253 tprintf("%#lx", tcp->u_arg[0]);
1255 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1256 tprintf(", %lu", tcp->u_arg[1]);
1262 sys_rt_sigsuspend(struct tcb *tcp)
1264 if (entering(tcp)) {
1265 /* NB: kernel requires arg[1] == NSIG / 8 */
1266 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1267 tprintf(", %lu", tcp->u_arg[1]);
1273 print_sigqueueinfo(struct tcb *tcp, int sig, unsigned long uinfo)
1277 printsiginfo_at(tcp, uinfo);
1281 sys_rt_sigqueueinfo(struct tcb *tcp)
1283 if (entering(tcp)) {
1284 tprintf("%lu, ", tcp->u_arg[0]);
1285 print_sigqueueinfo(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1291 sys_rt_tgsigqueueinfo(struct tcb *tcp)
1293 if (entering(tcp)) {
1294 tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
1295 print_sigqueueinfo(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1300 int sys_rt_sigtimedwait(struct tcb *tcp)
1302 /* NB: kernel requires arg[3] == NSIG / 8 */
1303 if (entering(tcp)) {
1304 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[3]);
1306 /* This is the only "return" parameter, */
1307 if (tcp->u_arg[1] != 0)
1309 /* ... if it's NULL, can decode all on entry */
1312 else if (tcp->u_arg[1] != 0) {
1313 /* syscall exit, and u_arg[1] wasn't NULL */
1314 printsiginfo_at(tcp, tcp->u_arg[1]);
1318 /* syscall exit, and u_arg[1] was NULL */
1321 print_timespec(tcp, tcp->u_arg[2]);
1322 tprintf(", %lu", tcp->u_arg[3]);
1327 sys_restart_syscall(struct tcb *tcp)
1330 tprints("<... resuming interrupted call ...>");
1335 do_signalfd(struct tcb *tcp, int flags_arg)
1337 /* NB: kernel requires arg[2] == NSIG / 8 */
1338 if (entering(tcp)) {
1339 printfd(tcp, tcp->u_arg[0]);
1341 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1342 tprintf(", %lu", tcp->u_arg[2]);
1343 if (flags_arg >= 0) {
1345 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1352 sys_signalfd(struct tcb *tcp)
1354 return do_signalfd(tcp, -1);
1358 sys_signalfd4(struct tcb *tcp)
1360 return do_signalfd(tcp, 3);