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 # ifndef PTRACE_PEEKUSR
41 # define PTRACE_PEEKUSR PTRACE_PEEKUSER
43 # ifndef PTRACE_POKEUSR
44 # define PTRACE_POKEUSR PTRACE_POKEUSER
46 #elif defined(HAVE_LINUX_PTRACE_H)
47 # undef PTRACE_SYSCALL
48 # ifdef HAVE_STRUCT_IA64_FPREG
49 # define ia64_fpreg XXX_ia64_fpreg
51 # ifdef HAVE_STRUCT_PT_ALL_USER_REGS
52 # define pt_all_user_regs XXX_pt_all_user_regs
54 # include <linux/ptrace.h>
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
95 #if defined I386 || defined X86_64 || defined X32
96 /* The libc headers do not define this constant since it should only be
97 used by the implementation. So we define it here. */
99 # define SA_RESTORER 0x04000000
103 static const struct xlat sigact_flags[] = {
105 { SA_RESTORER, "SA_RESTORER" },
108 { SA_STACK, "SA_STACK" },
111 { SA_RESTART, "SA_RESTART" },
114 { SA_INTERRUPT, "SA_INTERRUPT" },
117 { SA_NODEFER, "SA_NODEFER" },
119 #if defined SA_NOMASK && SA_NODEFER != SA_NOMASK
120 { SA_NOMASK, "SA_NOMASK" },
123 { SA_RESETHAND, "SA_RESETHAND" },
125 #if defined SA_ONESHOT && SA_ONESHOT != SA_RESETHAND
126 { SA_ONESHOT, "SA_ONESHOT" },
129 { SA_SIGINFO, "SA_SIGINFO" },
132 { SA_RESETHAND, "SA_RESETHAND" },
135 { SA_ONSTACK, "SA_ONSTACK" },
138 { SA_NODEFER, "SA_NODEFER" },
141 { SA_NOCLDSTOP, "SA_NOCLDSTOP" },
144 { SA_NOCLDWAIT, "SA_NOCLDWAIT" },
147 { _SA_BSDCALL, "_SA_BSDCALL" },
150 { SA_NOPTRACE, "SA_NOPTRACE" },
155 static const struct xlat sigprocmaskcmds[] = {
156 { SIG_BLOCK, "SIG_BLOCK" },
157 { SIG_UNBLOCK, "SIG_UNBLOCK" },
158 { SIG_SETMASK, "SIG_SETMASK" },
160 { SIG_SETMASK32,"SIG_SETMASK32" },
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 sprintsigmask(const char *str, sigset_t *mask)
218 /* set might include realtime sigs */
220 /* Was [8 * sizeof(sigset_t) * 8], but
221 * glibc sigset_t is huge (1024 bits = 128 *bytes*),
222 * and we were ending up with 8k (!) buffer here.
224 * No Unix system can have sig > 255
225 * (waitpid API won't be able to indicate death from one)
226 * and sig 0 doesn't exist either.
227 * Therefore max possible no of sigs is 255: 1..255
229 static char outstr[8 * (255 * 2 / 3)];
237 /* Note: nsignals = ARRAY_SIZE(signalent[]),
238 * and that array may not have SIGRTnn.
241 maxsigs = __SIGRTMAX + 1; /* instead */
245 s = stpcpy(outstr, str);
247 for (i = 1; i < maxsigs; i++) {
248 if (sigismember(mask, i) == 1)
252 /* 1: show mask members, 0: show those which are NOT in mask */
253 show_members = (nsigs < nsignals * 2 / 3);
258 for (i = 1; i < maxsigs; i++) {
259 if (sigismember(mask, i) == show_members) {
262 s = stpcpy(s, signalent[i] + 3);
265 else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
266 s += sprintf(s, "RT_%u", i - __SIGRTMIN);
270 s += sprintf(s, "%u", i);
283 sprintsigmask_long(const char *str, long mask)
288 return sprintsigmask(str, &s);
292 printsigmask(sigset_t *mask)
294 tprints(sprintsigmask("", mask));
300 tprints(signame(nr));
304 print_sigset_addr_len(struct tcb *tcp, long addr, long len)
312 /* Here len is usually equals NSIG / 8 or current_wordsize.
313 * But we code this defensively:
317 tprintf("%#lx", addr);
323 if (umoven(tcp, addr, len, (char *)&ss) < 0)
329 #define ILL_ILLOPC 1 /* illegal opcode */
330 #define ILL_ILLOPN 2 /* illegal operand */
331 #define ILL_ILLADR 3 /* illegal addressing mode */
332 #define ILL_ILLTRP 4 /* illegal trap */
333 #define ILL_PRVOPC 5 /* privileged opcode */
334 #define ILL_PRVREG 6 /* privileged register */
335 #define ILL_COPROC 7 /* coprocessor error */
336 #define ILL_BADSTK 8 /* internal stack error */
337 #define FPE_INTDIV 1 /* integer divide by zero */
338 #define FPE_INTOVF 2 /* integer overflow */
339 #define FPE_FLTDIV 3 /* floating point divide by zero */
340 #define FPE_FLTOVF 4 /* floating point overflow */
341 #define FPE_FLTUND 5 /* floating point underflow */
342 #define FPE_FLTRES 6 /* floating point inexact result */
343 #define FPE_FLTINV 7 /* floating point invalid operation */
344 #define FPE_FLTSUB 8 /* subscript out of range */
345 #define SEGV_MAPERR 1 /* address not mapped to object */
346 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */
347 #define BUS_ADRALN 1 /* invalid address alignment */
348 #define BUS_ADRERR 2 /* non-existant physical address */
349 #define BUS_OBJERR 3 /* object specific hardware error */
350 #define TRAP_BRKPT 1 /* process breakpoint */
351 #define TRAP_TRACE 2 /* process trace trap */
352 #define CLD_EXITED 1 /* child has exited */
353 #define CLD_KILLED 2 /* child was killed */
354 #define CLD_DUMPED 3 /* child terminated abnormally */
355 #define CLD_TRAPPED 4 /* traced child has trapped */
356 #define CLD_STOPPED 5 /* child has stopped */
357 #define CLD_CONTINUED 6 /* stopped child has continued */
358 #define POLL_IN 1 /* data input available */
359 #define POLL_OUT 2 /* output buffers available */
360 #define POLL_MSG 3 /* input message available */
361 #define POLL_ERR 4 /* i/o error */
362 #define POLL_PRI 5 /* high priority input available */
363 #define POLL_HUP 6 /* device disconnected */
364 #define SI_KERNEL 0x80 /* sent by kernel */
365 #define SI_USER 0 /* sent by kill, sigsend, raise */
366 #define SI_QUEUE -1 /* sent by sigqueue */
367 #define SI_TIMER -2 /* sent by timer expiration */
368 #define SI_MESGQ -3 /* sent by real time mesq state change */
369 #define SI_ASYNCIO -4 /* sent by AIO completion */
370 #define SI_SIGIO -5 /* sent by SIGIO */
371 #define SI_TKILL -6 /* sent by tkill */
372 #define SI_ASYNCNL -60 /* sent by asynch name lookup completion */
376 # define SI_FROMUSER(sip) ((sip)->si_code <= 0)
379 static const struct xlat siginfo_codes[] = {
381 { SI_KERNEL, "SI_KERNEL" },
384 { SI_USER, "SI_USER" },
387 { SI_QUEUE, "SI_QUEUE" },
390 { SI_TIMER, "SI_TIMER" },
393 { SI_MESGQ, "SI_MESGQ" },
396 { SI_ASYNCIO, "SI_ASYNCIO" },
399 { SI_SIGIO, "SI_SIGIO" },
402 { SI_TKILL, "SI_TKILL" },
405 { SI_ASYNCNL, "SI_ASYNCNL" },
408 { SI_NOINFO, "SI_NOINFO" },
411 { SI_LWP, "SI_LWP" },
416 static const struct xlat sigill_codes[] = {
417 { ILL_ILLOPC, "ILL_ILLOPC" },
418 { ILL_ILLOPN, "ILL_ILLOPN" },
419 { ILL_ILLADR, "ILL_ILLADR" },
420 { ILL_ILLTRP, "ILL_ILLTRP" },
421 { ILL_PRVOPC, "ILL_PRVOPC" },
422 { ILL_PRVREG, "ILL_PRVREG" },
423 { ILL_COPROC, "ILL_COPROC" },
424 { ILL_BADSTK, "ILL_BADSTK" },
428 static const struct xlat sigfpe_codes[] = {
429 { FPE_INTDIV, "FPE_INTDIV" },
430 { FPE_INTOVF, "FPE_INTOVF" },
431 { FPE_FLTDIV, "FPE_FLTDIV" },
432 { FPE_FLTOVF, "FPE_FLTOVF" },
433 { FPE_FLTUND, "FPE_FLTUND" },
434 { FPE_FLTRES, "FPE_FLTRES" },
435 { FPE_FLTINV, "FPE_FLTINV" },
436 { FPE_FLTSUB, "FPE_FLTSUB" },
440 static const struct xlat sigtrap_codes[] = {
441 { TRAP_BRKPT, "TRAP_BRKPT" },
442 { TRAP_TRACE, "TRAP_TRACE" },
446 static const struct xlat sigchld_codes[] = {
447 { CLD_EXITED, "CLD_EXITED" },
448 { CLD_KILLED, "CLD_KILLED" },
449 { CLD_DUMPED, "CLD_DUMPED" },
450 { CLD_TRAPPED, "CLD_TRAPPED" },
451 { CLD_STOPPED, "CLD_STOPPED" },
452 { CLD_CONTINUED,"CLD_CONTINUED" },
456 static const struct xlat sigpoll_codes[] = {
457 { POLL_IN, "POLL_IN" },
458 { POLL_OUT, "POLL_OUT" },
459 { POLL_MSG, "POLL_MSG" },
460 { POLL_ERR, "POLL_ERR" },
461 { POLL_PRI, "POLL_PRI" },
462 { POLL_HUP, "POLL_HUP" },
466 static const struct xlat sigprof_codes[] = {
468 { PROF_SIG, "PROF_SIG" },
474 static const struct xlat sigemt_codes[] = {
476 { EMT_TAGOVF, "EMT_TAGOVF" },
482 static const struct xlat sigsegv_codes[] = {
483 { SEGV_MAPERR, "SEGV_MAPERR" },
484 { SEGV_ACCERR, "SEGV_ACCERR" },
488 static const struct xlat sigbus_codes[] = {
489 { BUS_ADRALN, "BUS_ADRALN" },
490 { BUS_ADRERR, "BUS_ADRERR" },
491 { BUS_OBJERR, "BUS_OBJERR" },
496 printsiginfo(siginfo_t *sip, int verbose)
500 if (sip->si_signo == 0) {
504 tprints("{si_signo=");
505 printsignal(sip->si_signo);
506 code = xlookup(siginfo_codes, sip->si_code);
508 switch (sip->si_signo) {
510 code = xlookup(sigtrap_codes, sip->si_code);
513 code = xlookup(sigchld_codes, sip->si_code);
516 code = xlookup(sigpoll_codes, sip->si_code);
519 code = xlookup(sigprof_codes, sip->si_code);
522 code = xlookup(sigill_codes, sip->si_code);
526 code = xlookup(sigemt_codes, sip->si_code);
530 code = xlookup(sigfpe_codes, sip->si_code);
533 code = xlookup(sigsegv_codes, sip->si_code);
536 code = xlookup(sigbus_codes, sip->si_code);
541 tprintf(", si_code=%s", code);
543 tprintf(", si_code=%#x", sip->si_code);
545 if (sip->si_code != SI_NOINFO)
549 if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
550 tprintf(", si_errno=%d", sip->si_errno);
552 tprintf(", si_errno=%s",
553 errnoent[sip->si_errno]);
556 if (SI_FROMUSER(sip)) {
557 tprintf(", si_pid=%lu, si_uid=%lu",
558 (unsigned long) sip->si_pid,
559 (unsigned long) sip->si_uid);
560 switch (sip->si_code) {
571 tprintf(", si_value=%d", sip->si_int);
580 tprintf(", si_value={int=%u, ptr=%#lx}",
582 (unsigned long) sip->si_ptr);
587 #endif /* SI_FROMUSER */
589 switch (sip->si_signo) {
591 tprintf(", si_pid=%ld, si_status=",
593 if (sip->si_code == CLD_EXITED)
594 tprintf("%d", sip->si_status);
596 printsignal(sip->si_status);
600 tprintf(", si_utime=%llu, si_stime=%llu",
601 (unsigned long long) sip->si_utime,
602 (unsigned long long) sip->si_stime);
604 case SIGILL: case SIGFPE:
605 case SIGSEGV: case SIGBUS:
606 tprintf(", si_addr=%#lx",
607 (unsigned long) sip->si_addr);
610 switch (sip->si_code) {
611 case POLL_IN: case POLL_OUT: case POLL_MSG:
612 tprintf(", si_band=%ld",
613 (long) sip->si_band);
618 if (sip->si_pid || sip->si_uid)
619 tprintf(", si_pid=%lu, si_uid=%lu",
620 (unsigned long) sip->si_pid,
621 (unsigned long) sip->si_uid);
627 tprintf(", si_value={int=%u, ptr=%#lx}",
629 (unsigned long) sip->si_ptr);
639 printsiginfo_at(struct tcb *tcp, long addr)
647 tprintf("%#lx", addr);
650 if (umove(tcp, addr, &si) < 0) {
654 printsiginfo(&si, verbose(tcp));
658 sys_sigsetmask(struct tcb *tcp)
661 tprints(sprintsigmask_long("", tcp->u_arg[0]));
663 else if (!syserror(tcp)) {
664 tcp->auxstr = sprintsigmask_long("old mask ", tcp->u_rval);
665 return RVAL_HEX | RVAL_STR;
670 #ifdef HAVE_SIGACTION
672 struct old_sigaction {
673 /* sa_handler may be a libc #define, need to use other name: */
674 void (*__sa_handler)(int);
675 unsigned long sa_mask;
676 unsigned long sa_flags;
677 void (*sa_restorer)(void);
681 sys_sigaction(struct tcb *tcp)
684 struct old_sigaction sa;
687 printsignal(tcp->u_arg[0]);
689 addr = tcp->u_arg[1];
691 addr = tcp->u_arg[2];
694 else if (!verbose(tcp))
695 tprintf("%#lx", addr);
696 else if (umove(tcp, addr, &sa) < 0)
699 /* Architectures using function pointers, like
700 * hppa, may need to manipulate the function pointer
701 * to compute the result of a comparison. However,
702 * the __sa_handler function pointer exists only in
703 * the address space of the traced process, and can't
704 * be manipulated by strace. In order to prevent the
705 * compiler from generating code to manipulate
706 * __sa_handler we cast the function pointers to long. */
707 if ((long)sa.__sa_handler == (long)SIG_ERR)
708 tprints("{SIG_ERR, ");
709 else if ((long)sa.__sa_handler == (long)SIG_DFL)
710 tprints("{SIG_DFL, ");
711 else if ((long)sa.__sa_handler == (long)SIG_IGN)
712 tprints("{SIG_IGN, ");
714 tprintf("{%#lx, ", (long) sa.__sa_handler);
715 tprints(sprintsigmask_long("", sa.sa_mask));
717 printflags(sigact_flags, sa.sa_flags, "SA_???");
719 if (sa.sa_flags & SA_RESTORER)
720 tprintf(", %p", sa.sa_restorer);
727 tprintf(", %#lx", (unsigned long) sa.sa_restorer);
732 sys_signal(struct tcb *tcp)
735 printsignal(tcp->u_arg[0]);
737 switch (tcp->u_arg[1]) {
748 tprintf("%#lx", tcp->u_arg[1]);
752 else if (!syserror(tcp)) {
753 switch (tcp->u_rval) {
755 tcp->auxstr = "SIG_ERR"; break;
757 tcp->auxstr = "SIG_DFL"; break;
759 tcp->auxstr = "SIG_IGN"; break;
763 return RVAL_HEX | RVAL_STR;
768 #endif /* HAVE_SIGACTION */
771 sys_sigreturn(struct tcb *tcp)
775 struct arm_sigcontext {
776 unsigned long trap_no;
777 unsigned long error_code;
778 unsigned long oldmask;
779 unsigned long arm_r0;
780 unsigned long arm_r1;
781 unsigned long arm_r2;
782 unsigned long arm_r3;
783 unsigned long arm_r4;
784 unsigned long arm_r5;
785 unsigned long arm_r6;
786 unsigned long arm_r7;
787 unsigned long arm_r8;
788 unsigned long arm_r9;
789 unsigned long arm_r10;
790 unsigned long arm_fp;
791 unsigned long arm_ip;
792 unsigned long arm_sp;
793 unsigned long arm_lr;
794 unsigned long arm_pc;
795 unsigned long arm_cpsr;
796 unsigned long fault_address;
798 struct arm_ucontext {
799 unsigned long uc_flags;
800 unsigned long uc_link; /* struct ucontext* */
801 /* The next three members comprise stack_t struct: */
802 unsigned long ss_sp; /* void* */
803 unsigned long ss_flags; /* int */
804 unsigned long ss_size; /* size_t */
805 struct arm_sigcontext sc;
806 /* These two members are sigset_t: */
807 unsigned long uc_sigmask[2];
808 /* more fields follow, which we aren't interested in */
810 struct arm_ucontext uc;
812 if (umove(tcp, arm_regs.ARM_sp, &uc) < 0)
814 /* Kernel fills out uc.sc.oldmask too when it sets up signal stack,
815 * but for sigmask restore, sigreturn syscall uses uc.uc_sigmask instead.
816 * tprints(sprintsigmask_long(") (mask ", uc.sc.oldmask));
819 ((uint32_t*)&sigm)[0] = uc.uc_sigmask[0];
820 ((uint32_t*)&sigm)[1] = uc.uc_sigmask[1];
821 tprints(sprintsigmask(") (mask ", &sigm));
823 #elif defined(S390) || defined(S390X)
826 struct sigcontext_struct sc;
827 if (upeek(tcp->pid, PT_GPR15, &usp) < 0)
829 if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
831 tprints(sprintsigmask(") (mask ", (sigset_t *)&sc.oldmask[0]));
833 #elif defined(I386) || defined(X86_64)
835 if (current_personality == 0) /* 64-bit */
839 struct i386_sigcontext_struct {
857 uint32_t esp_at_signal;
863 struct i386_fpstate {
871 uint8_t st[8][10]; /* 8*10 bytes: FP regs */
874 uint32_t fxsr_env[6];
877 uint8_t stx[8][16]; /* 8*16 bytes: FP regs, each padded to 16 bytes */
878 uint8_t xmm[8][16]; /* 8 XMM regs */
879 uint32_t padding1[44];
880 uint32_t padding2[12]; /* union with struct _fpx_sw_bytes */
883 struct i386_sigcontext_struct sc;
884 struct i386_fpstate fp;
885 uint32_t extramask[1];
887 /* On i386, sc is followed on stack by struct fpstate
888 * and after it an additional u32 extramask[1] which holds
889 * upper half of the mask.
895 if (umove(tcp, *i386_esp_ptr, &signal_stack) < 0)
897 sigemptyset(&sigmask.sig);
898 sigmask.mask[0] = signal_stack.sc.oldmask;
899 sigmask.mask[1] = signal_stack.extramask[0];
900 tprints(sprintsigmask(") (mask ", &sigmask.sig));
904 struct sigcontext sc;
907 /* offset of sigcontext in the kernel's sigframe structure: */
908 # define SIGFRAME_SC_OFFSET 0x90
909 if (upeek(tcp->pid, PT_R12, &sp) < 0)
911 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
914 memcpy(&sigm, &sc.sc_mask, NSIG / 8);
915 tprints(sprintsigmask(") (mask ", &sigm));
917 #elif defined(POWERPC)
920 struct sigcontext_struct sc;
922 esp = ppc_regs.gpr[1];
924 /* Skip dummy stack frame. */
926 if (current_personality == 0)
933 if (umove(tcp, esp, &sc) < 0)
935 tprints(sprintsigmask_long(") (mask ", sc.oldmask));
940 struct sigcontext sc;
941 if (upeek(tcp->pid, 4*PT_USP, &usp) < 0)
943 if (umove(tcp, usp, &sc) < 0)
945 tprints(sprintsigmask_long(") (mask ", sc.sc_mask));
950 struct sigcontext_struct sc;
951 if (upeek(tcp->pid, REG_FP, &fp) < 0)
953 if (umove(tcp, fp, &sc) < 0)
955 tprints(sprintsigmask_long(") (mask ", sc.sc_mask));
957 #elif defined(SPARC) || defined(SPARC64)
961 i1 = sparc_regs.u_regs[U_REG_O1];
962 if (umove(tcp, i1, &si) < 0) {
963 perror_msg("sigreturn: umove");
966 tprints(sprintsigmask_long(") (mask ", si.si_mask));
968 #elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
969 /* This decodes rt_sigreturn. The 64-bit ABIs do not have
975 if (upeek(tcp->pid, REG_SP, &sp) < 0)
977 /* There are six words followed by a 128-byte siginfo. */
978 sp = sp + 6 * 4 + 128;
979 if (umove(tcp, sp, &uc) < 0)
981 tprints(sprintsigmask_long(") (mask ", *(long *) &uc.uc_sigmask));
988 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
989 perror_msg("sigreturn: PTRACE_GETREGS");
993 if (umove(tcp, sp, &si) < 0)
995 tprints(sprintsigmask_long(") (mask ", si.si_mask));
997 #elif defined(CRISV10) || defined(CRISV32)
999 struct sigcontext sc;
1000 long regs[PT_MAX+1];
1001 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
1002 perror_msg("sigreturn: PTRACE_GETREGS");
1005 if (umove(tcp, regs[PT_USP], &sc) < 0)
1007 tprints(sprintsigmask_long(") (mask ", sc.oldmask));
1010 if (entering(tcp)) {
1014 /* offset of ucontext in the kernel's sigframe structure */
1015 # define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(siginfo_t)
1016 if (umove(tcp, tile_regs.sp + SIGFRAME_UC_OFFSET, &uc) < 0)
1019 memcpy(&sigm, &uc.uc_sigmask, NSIG / 8);
1020 tprints(sprintsigmask(") (mask ", &sigm));
1022 #elif defined(MICROBLAZE)
1023 /* TODO: Verify that this is correct... */
1024 if (entering(tcp)) {
1025 struct sigcontext sc;
1027 /* Read r1, the stack pointer. */
1028 if (upeek(tcp->pid, 1 * 4, &sp) < 0)
1030 if (umove(tcp, sp, &sc) < 0)
1032 tprints(sprintsigmask_long(") (mask ", sc.oldmask));
1034 #elif defined(XTENSA)
1035 /* Xtensa only has rt_sys_sigreturn */
1037 /* ARC syscall ABI only supports rt_sys_sigreturn */
1039 # warning No sys_sigreturn() for this architecture
1040 # warning (no problem, just a reminder :-)
1046 sys_siggetmask(struct tcb *tcp)
1049 tcp->auxstr = sprintsigmask_long("mask ", tcp->u_rval);
1051 return RVAL_HEX | RVAL_STR;
1055 sys_sigsuspend(struct tcb *tcp)
1057 if (entering(tcp)) {
1058 tprints(sprintsigmask_long("", tcp->u_arg[2]));
1063 #if !defined SS_ONSTACK
1064 #define SS_ONSTACK 1
1065 #define SS_DISABLE 2
1068 static const struct xlat sigaltstack_flags[] = {
1069 { SS_ONSTACK, "SS_ONSTACK" },
1070 { SS_DISABLE, "SS_DISABLE" },
1075 print_stack_t(struct tcb *tcp, unsigned long addr)
1081 } else if (umove(tcp, addr, &ss) < 0) {
1082 tprintf("%#lx", addr);
1084 tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1085 printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1086 tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1091 sys_sigaltstack(struct tcb *tcp)
1093 if (entering(tcp)) {
1094 print_stack_t(tcp, tcp->u_arg[0]);
1098 print_stack_t(tcp, tcp->u_arg[1]);
1103 #ifdef HAVE_SIGACTION
1105 /* "Old" sigprocmask, which operates with word-sized signal masks */
1107 sys_sigprocmask(struct tcb *tcp)
1110 if (entering(tcp)) {
1112 * Alpha/OSF is different: it doesn't pass in two pointers,
1113 * but rather passes in the new bitmask as an argument and
1114 * then returns the old bitmask. This "works" because we
1115 * only have 64 signals to worry about. If you want more,
1116 * use of the rt_sigprocmask syscall is required.
1118 * old = osf_sigprocmask(how, new);
1120 * ret = sigprocmask(how, &new, &old, ...);
1122 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1123 tprints(sprintsigmask_long(", ", tcp->u_arg[1]));
1125 else if (!syserror(tcp)) {
1126 tcp->auxstr = sprintsigmask_long("old mask ", tcp->u_rval);
1127 return RVAL_HEX | RVAL_STR;
1130 if (entering(tcp)) {
1131 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1133 print_sigset_addr_len(tcp, tcp->u_arg[1], current_wordsize);
1138 tprintf("%#lx", tcp->u_arg[2]);
1140 print_sigset_addr_len(tcp, tcp->u_arg[2], current_wordsize);
1142 # endif /* !ALPHA */
1146 #endif /* HAVE_SIGACTION */
1149 sys_kill(struct tcb *tcp)
1151 if (entering(tcp)) {
1153 widen_to_long(tcp->u_arg[0]),
1154 signame(tcp->u_arg[1])
1161 sys_tgkill(struct tcb *tcp)
1163 if (entering(tcp)) {
1164 tprintf("%ld, %ld, %s",
1165 widen_to_long(tcp->u_arg[0]),
1166 widen_to_long(tcp->u_arg[1]),
1167 signame(tcp->u_arg[2])
1174 sys_sigpending(struct tcb *tcp)
1178 tprintf("%#lx", tcp->u_arg[0]);
1180 print_sigset_addr_len(tcp, tcp->u_arg[0], current_wordsize);
1186 sys_rt_sigprocmask(struct tcb *tcp)
1188 /* Note: arg[3] is the length of the sigset. Kernel requires NSIG / 8 */
1189 if (entering(tcp)) {
1190 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1192 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[3]);
1197 tprintf("%#lx", tcp->u_arg[2]);
1199 print_sigset_addr_len(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1200 tprintf(", %lu", tcp->u_arg[3]);
1205 /* Structure describing the action to be taken when a signal arrives. */
1206 struct new_sigaction
1208 /* sa_handler may be a libc #define, need to use other name: */
1209 void (*__sa_handler)(int);
1210 unsigned long sa_flags;
1211 void (*sa_restorer)(void);
1212 /* Kernel treats sa_mask as an array of longs. */
1213 unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
1215 /* Same for i386-on-x86_64 and similar cases */
1216 struct new_sigaction32
1218 uint32_t __sa_handler;
1220 uint32_t sa_restorer;
1221 uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
1225 sys_rt_sigaction(struct tcb *tcp)
1227 struct new_sigaction sa;
1232 if (entering(tcp)) {
1233 printsignal(tcp->u_arg[0]);
1235 addr = tcp->u_arg[1];
1237 addr = tcp->u_arg[2];
1243 if (!verbose(tcp)) {
1244 tprintf("%#lx", addr);
1247 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
1248 if (current_wordsize != sizeof(sa.sa_flags) && current_wordsize == 4) {
1249 struct new_sigaction32 sa32;
1250 r = umove(tcp, addr, &sa32);
1252 memset(&sa, 0, sizeof(sa));
1253 sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler;
1254 sa.sa_flags = sa32.sa_flags;
1255 sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer;
1256 /* Kernel treats sa_mask as an array of longs.
1257 * For 32-bit process, "long" is uint32_t, thus, for example,
1258 * 32th bit in sa_mask will end up as bit 0 in sa_mask[1].
1259 * But for (64-bit) kernel, 32th bit in sa_mask is
1260 * 32th bit in 0th (64-bit) long!
1261 * For little-endian, it's the same.
1262 * For big-endian, we swap 32-bit words.
1264 sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
1269 r = umove(tcp, addr, &sa);
1275 /* Architectures using function pointers, like
1276 * hppa, may need to manipulate the function pointer
1277 * to compute the result of a comparison. However,
1278 * the __sa_handler function pointer exists only in
1279 * the address space of the traced process, and can't
1280 * be manipulated by strace. In order to prevent the
1281 * compiler from generating code to manipulate
1282 * __sa_handler we cast the function pointers to long. */
1283 if ((long)sa.__sa_handler == (long)SIG_ERR)
1284 tprints("{SIG_ERR, ");
1285 else if ((long)sa.__sa_handler == (long)SIG_DFL)
1286 tprints("{SIG_DFL, ");
1287 else if ((long)sa.__sa_handler == (long)SIG_IGN)
1288 tprints("{SIG_IGN, ");
1290 tprintf("{%#lx, ", (long) sa.__sa_handler);
1292 * Sigset size is in tcp->u_arg[4] (SPARC)
1293 * or in tcp->u_arg[3] (all other),
1294 * but kernel won't handle sys_rt_sigaction
1295 * with wrong sigset size (just returns EINVAL instead).
1296 * We just fetch the right size, which is NSIG / 8.
1298 sigemptyset(&sigset);
1299 memcpy(&sigset, &sa.sa_mask, NSIG / 8);
1300 printsigmask(&sigset);
1303 printflags(sigact_flags, sa.sa_flags, "SA_???");
1305 if (sa.sa_flags & SA_RESTORER)
1306 tprintf(", %p", sa.sa_restorer);
1314 #if defined(SPARC) || defined(SPARC64)
1315 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1316 #elif defined(ALPHA)
1317 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1319 tprintf(", %lu", tcp->u_arg[3]);
1325 sys_rt_sigpending(struct tcb *tcp)
1329 * One of the few syscalls where sigset size (arg[1])
1330 * is allowed to be <= NSIG / 8, not strictly ==.
1331 * This allows non-rt sigpending() syscall
1332 * to reuse rt_sigpending() code in kernel.
1335 tprintf("%#lx", tcp->u_arg[0]);
1337 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1338 tprintf(", %lu", tcp->u_arg[1]);
1344 sys_rt_sigsuspend(struct tcb *tcp)
1346 if (entering(tcp)) {
1347 /* NB: kernel requires arg[1] == NSIG / 8 */
1348 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
1349 tprintf(", %lu", tcp->u_arg[1]);
1355 print_sigqueueinfo(struct tcb *tcp, int sig, unsigned long uinfo)
1359 printsiginfo_at(tcp, uinfo);
1363 sys_rt_sigqueueinfo(struct tcb *tcp)
1365 if (entering(tcp)) {
1366 tprintf("%lu, ", tcp->u_arg[0]);
1367 print_sigqueueinfo(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1373 sys_rt_tgsigqueueinfo(struct tcb *tcp)
1375 if (entering(tcp)) {
1376 tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
1377 print_sigqueueinfo(tcp, tcp->u_arg[2], tcp->u_arg[3]);
1382 int sys_rt_sigtimedwait(struct tcb *tcp)
1384 /* NB: kernel requires arg[3] == NSIG / 8 */
1385 if (entering(tcp)) {
1386 print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[3]);
1388 /* This is the only "return" parameter, */
1389 if (tcp->u_arg[1] != 0)
1391 /* ... if it's NULL, can decode all on entry */
1394 else if (tcp->u_arg[1] != 0) {
1395 /* syscall exit, and u_arg[1] wasn't NULL */
1396 printsiginfo_at(tcp, tcp->u_arg[1]);
1400 /* syscall exit, and u_arg[1] was NULL */
1403 print_timespec(tcp, tcp->u_arg[2]);
1404 tprintf(", %lu", tcp->u_arg[3]);
1409 sys_restart_syscall(struct tcb *tcp)
1412 tprints("<... resuming interrupted call ...>");
1417 do_signalfd(struct tcb *tcp, int flags_arg)
1419 /* NB: kernel requires arg[2] == NSIG / 8 */
1420 if (entering(tcp)) {
1421 printfd(tcp, tcp->u_arg[0]);
1423 print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[2]);
1424 tprintf(", %lu", tcp->u_arg[2]);
1425 if (flags_arg >= 0) {
1427 printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
1434 sys_signalfd(struct tcb *tcp)
1436 return do_signalfd(tcp, -1);
1440 sys_signalfd4(struct tcb *tcp)
1442 return do_signalfd(tcp, 3);