granicus.if.org Git - strace/blob - signal.c

   1 /*
   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>
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  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.
  21  *
  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.
  32  *
  33  *      $Id$
  34  */
  35
  36 #include "defs.h"
  37
  38 #include <signal.h>
  39 #include <sys/user.h>
  40 #include <fcntl.h>
  41
  42 #ifdef SVR4
  43 #include <sys/ucontext.h>
  44 #endif /* SVR4 */
  45
  46 #ifdef HAVE_SYS_REG_H
  47 # include <sys/reg.h>
  48 #ifndef PTRACE_PEEKUSR
  49 # define PTRACE_PEEKUSR PTRACE_PEEKUSER
  50 #endif
  51 #ifndef PTRACE_POKEUSR
  52 # define PTRACE_POKEUSR PTRACE_POKEUSER
  53 #endif
  54 #elif defined(HAVE_LINUX_PTRACE_H)
  55 #undef PTRACE_SYSCALL
  56 # ifdef HAVE_STRUCT_IA64_FPREG
  57 #  define ia64_fpreg XXX_ia64_fpreg
  58 # endif
  59 # ifdef HAVE_STRUCT_PT_ALL_USER_REGS
  60 #  define pt_all_user_regs XXX_pt_all_user_regs
  61 # endif
  62 #include <linux/ptrace.h>
  63 # undef ia64_fpreg
  64 # undef pt_all_user_regs
  65 #endif
  66
  67
  68 #ifdef LINUX
  69
  70 #ifdef IA64
  71 # include <asm/ptrace_offsets.h>
  72 #endif /* !IA64 */
  73
  74 #if HAVE_ASM_REG_H
  75 # if defined (SPARC) || defined (SPARC64)
  76 #  define fpq kernel_fpq
  77 #  define fq kernel_fq
  78 #  define fpu kernel_fpu
  79 # endif
  80 # include <asm/reg.h>
  81 # if defined (SPARC) || defined (SPARC64)
  82 #  undef fpq
  83 #  undef fq
  84 #  undef fpu
  85 # endif
  86 #if defined (LINUX) && defined (SPARC64)
  87 # define r_pc r_tpc
  88 # undef PTRACE_GETREGS
  89 # define PTRACE_GETREGS PTRACE_GETREGS64
  90 # undef PTRACE_SETREGS
  91 # define PTRACE_SETREGS PTRACE_SETREGS64
  92 #endif /* LINUX && SPARC64 */
  93 #endif /* HAVE_ASM_REG_H */
  94
  95 #if defined (SPARC) || defined (SPARC64)
  96 typedef struct {
  97         struct regs             si_regs;
  98         int                     si_mask;
  99 } m_siginfo_t;
 100 #elif defined (MIPS)
 101 typedef struct {
 102         struct pt_regs          si_regs;
 103         int                     si_mask;
 104 } m_siginfo_t;
 105 #elif defined HAVE_ASM_SIGCONTEXT_H
 106 #if !defined(IA64) && !defined(X86_64)
 107 #include <asm/sigcontext.h>
 108 #endif /* !IA64 && !X86_64 */
 109 #else /* !HAVE_ASM_SIGCONTEXT_H */
 110 #if defined I386 && !defined HAVE_STRUCT_SIGCONTEXT_STRUCT
 111 struct sigcontext_struct {
 112         unsigned short gs, __gsh;
 113         unsigned short fs, __fsh;
 114         unsigned short es, __esh;
 115         unsigned short ds, __dsh;
 116         unsigned long edi;
 117         unsigned long esi;
 118         unsigned long ebp;
 119         unsigned long esp;
 120         unsigned long ebx;
 121         unsigned long edx;
 122         unsigned long ecx;
 123         unsigned long eax;
 124         unsigned long trapno;
 125         unsigned long err;
 126         unsigned long eip;
 127         unsigned short cs, __csh;
 128         unsigned long eflags;
 129         unsigned long esp_at_signal;
 130         unsigned short ss, __ssh;
 131         unsigned long i387;
 132         unsigned long oldmask;
 133         unsigned long cr2;
 134 };
 135 #else /* !I386 */
 136 #ifdef M68K
 137 struct sigcontext
 138 {
 139         unsigned long sc_mask;
 140         unsigned long sc_usp;
 141         unsigned long sc_d0;
 142         unsigned long sc_d1;
 143         unsigned long sc_a0;
 144         unsigned long sc_a1;
 145         unsigned short sc_sr;
 146         unsigned long sc_pc;
 147         unsigned short sc_formatvec;
 148 };
 149 #endif /* M68K */
 150 #endif /* !I386 */
 151 #endif /* !HAVE_ASM_SIGCONTEXT_H */
 152 #ifndef NSIG
 153 #define NSIG 32
 154 #endif
 155 #ifdef ARM
 156 #undef NSIG
 157 #define NSIG 32
 158 #endif
 159 #endif /* LINUX */
 160
 161 const char *const signalent0[] = {
 162 #include "signalent.h"
 163 };
 164 const int nsignals0 = sizeof signalent0 / sizeof signalent0[0];
 165
 166 #if SUPPORTED_PERSONALITIES >= 2
 167 const char *const signalent1[] = {
 168 #include "signalent1.h"
 169 };
 170 const int nsignals1 = sizeof signalent1 / sizeof signalent1[0];
 171 #endif /* SUPPORTED_PERSONALITIES >= 2 */
 172
 173 #if SUPPORTED_PERSONALITIES >= 3
 174 const char *const signalent2[] = {
 175 #include "signalent2.h"
 176 };
 177 const int nsignals2 = sizeof signalent2 / sizeof signalent2[0];
 178 #endif /* SUPPORTED_PERSONALITIES >= 3 */
 179
 180 const char *const *signalent;
 181 int nsignals;
 182
 183 #if defined(SUNOS4) || defined(FREEBSD)
 184
 185 static const struct xlat sigvec_flags[] = {
 186         { SV_ONSTACK,   "SV_ONSTACK"    },
 187         { SV_INTERRUPT, "SV_INTERRUPT"  },
 188         { SV_RESETHAND, "SV_RESETHAND"  },
 189         { SA_NOCLDSTOP, "SA_NOCLDSTOP"  },
 190         { 0,            NULL            },
 191 };
 192
 193 #endif /* SUNOS4 || FREEBSD */
 194
 195 #ifdef HAVE_SIGACTION
 196
 197 #if defined LINUX && (defined I386 || defined X86_64)
 198 /* The libc headers do not define this constant since it should only be
 199    used by the implementation.  So wwe define it here.  */
 200 # ifndef SA_RESTORER
 201 #  define SA_RESTORER 0x04000000
 202 # endif
 203 #endif
 204
 205 static const struct xlat sigact_flags[] = {
 206 #ifdef SA_RESTORER
 207         { SA_RESTORER,  "SA_RESTORER"   },
 208 #endif
 209 #ifdef SA_STACK
 210         { SA_STACK,     "SA_STACK"      },
 211 #endif
 212 #ifdef SA_RESTART
 213         { SA_RESTART,   "SA_RESTART"    },
 214 #endif
 215 #ifdef SA_INTERRUPT
 216         { SA_INTERRUPT, "SA_INTERRUPT"  },
 217 #endif
 218 #ifdef SA_NOMASK
 219         { SA_NOMASK,    "SA_NOMASK"     },
 220 #endif
 221 #ifdef SA_ONESHOT
 222         { SA_ONESHOT,   "SA_ONESHOT"    },
 223 #endif
 224 #ifdef SA_SIGINFO
 225         { SA_SIGINFO,   "SA_SIGINFO"    },
 226 #endif
 227 #ifdef SA_RESETHAND
 228         { SA_RESETHAND, "SA_RESETHAND"  },
 229 #endif
 230 #ifdef SA_ONSTACK
 231         { SA_ONSTACK,   "SA_ONSTACK"    },
 232 #endif
 233 #ifdef SA_NODEFER
 234         { SA_NODEFER,   "SA_NODEFER"    },
 235 #endif
 236 #ifdef SA_NOCLDSTOP
 237         { SA_NOCLDSTOP, "SA_NOCLDSTOP"  },
 238 #endif
 239 #ifdef SA_NOCLDWAIT
 240         { SA_NOCLDWAIT, "SA_NOCLDWAIT"  },
 241 #endif
 242 #ifdef _SA_BSDCALL
 243         { _SA_BSDCALL,  "_SA_BSDCALL"   },
 244 #endif
 245         { 0,            NULL            },
 246 };
 247
 248 static const struct xlat sigprocmaskcmds[] = {
 249         { SIG_BLOCK,    "SIG_BLOCK"     },
 250         { SIG_UNBLOCK,  "SIG_UNBLOCK"   },
 251         { SIG_SETMASK,  "SIG_SETMASK"   },
 252 #ifdef SIG_SETMASK32
 253         { SIG_SETMASK32,"SIG_SETMASK32" },
 254 #endif
 255         { 0,            NULL            },
 256 };
 257
 258 #endif /* HAVE_SIGACTION */
 259
 260 /* Anonymous realtime signals. */
 261 /* Under glibc 2.1, SIGRTMIN et al are functions, but __SIGRTMIN is a
 262    constant.  This is what we want.  Otherwise, just use SIGRTMIN. */
 263 #ifdef SIGRTMIN
 264 #ifndef __SIGRTMIN
 265 #define __SIGRTMIN SIGRTMIN
 266 #define __SIGRTMAX SIGRTMAX /* likewise */
 267 #endif
 268 #endif
 269
 270 const char *
 271 signame(sig)
 272 int sig;
 273 {
 274         static char buf[30];
 275         if (sig >= 0 && sig < nsignals) {
 276                 return signalent[sig];
 277 #ifdef SIGRTMIN
 278         } else if (sig >= __SIGRTMIN && sig <= __SIGRTMAX) {
 279                 sprintf(buf, "SIGRT_%ld", (long)(sig - __SIGRTMIN));
 280                 return buf;
 281 #endif /* SIGRTMIN */
 282         } else {
 283                 sprintf(buf, "%d", sig);
 284                 return buf;
 285         }
 286 }
 287
 288 #ifndef UNIXWARE
 289 static void
 290 long_to_sigset(l, s)
 291 long l;
 292 sigset_t *s;
 293 {
 294         sigemptyset(s);
 295         *(long *)s = l;
 296 }
 297 #endif
 298
 299 static int
 300 copy_sigset_len(tcp, addr, s, len)
 301 struct tcb *tcp;
 302 long addr;
 303 sigset_t *s;
 304 int len;
 305 {
 306         if (len > sizeof(*s))
 307                 len = sizeof(*s);
 308         sigemptyset(s);
 309         if (umoven(tcp, addr, len, (char *)s) < 0)
 310                 return -1;
 311         return 0;
 312 }
 313
 314 #ifdef LINUX
 315 /* Original sigset is unsigned long */
 316 #define copy_sigset(tcp, addr, s) copy_sigset_len(tcp, addr, s, sizeof(long))
 317 #else
 318 #define copy_sigset(tcp, addr, s) copy_sigset_len(tcp, addr, s, sizeof(sigset_t))
 319 #endif
 320
 321 static const char *
 322 sprintsigmask(const char *str, sigset_t *mask, int rt)
 323 /* set might include realtime sigs */
 324 {
 325         int i, nsigs;
 326         int maxsigs;
 327         char *format, *s;
 328         static char outstr[8 * sizeof(sigset_t) * 8];
 329
 330         strcpy(outstr, str);
 331         s = outstr + strlen(outstr);
 332         nsigs = 0;
 333         maxsigs = nsignals;
 334 #ifdef __SIGRTMAX
 335         if (rt)
 336                 maxsigs = __SIGRTMAX; /* instead */
 337 #endif
 338         for (i = 1; i < maxsigs; i++) {
 339                 if (sigismember(mask, i) == 1)
 340                         nsigs++;
 341         }
 342         if (nsigs >= nsignals * 2 / 3) {
 343                 *s++ = '~';
 344                 for (i = 1; i < maxsigs; i++) {
 345                         switch (sigismember(mask, i)) {
 346                         case 1:
 347                                 sigdelset(mask, i);
 348                                 break;
 349                         case 0:
 350                                 sigaddset(mask, i);
 351                                 break;
 352                         }
 353                 }
 354         }
 355         format = "%s";
 356         *s++ = '[';
 357         for (i = 1; i < maxsigs; i++) {
 358                 if (sigismember(mask, i) == 1) {
 359                         /* real-time signals on solaris don't have
 360                          * signalent entries
 361                          */
 362                         if (i < nsignals) {
 363                                 sprintf(s, format, signalent[i] + 3);
 364                         }
 365 #ifdef SIGRTMIN
 366                         else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
 367                                 char tsig[40];
 368                                 sprintf(tsig, "RT_%u", i - __SIGRTMIN);
 369                                 sprintf(s, format, tsig);
 370                         }
 371 #endif /* SIGRTMIN */
 372                         else {
 373                                 char tsig[32];
 374                                 sprintf(tsig, "%u", i);
 375                                 sprintf(s, format, tsig);
 376                         }
 377                         s += strlen(s);
 378                         format = " %s";
 379                 }
 380         }
 381         *s++ = ']';
 382         *s = '\0';
 383         return outstr;
 384 }
 385
 386 static void
 387 printsigmask(mask, rt)
 388 sigset_t *mask;
 389 int rt;
 390 {
 391         tprintf("%s", sprintsigmask("", mask, rt));
 392 }
 393
 394 void
 395 printsignal(nr)
 396 int nr;
 397 {
 398         tprintf(signame(nr));
 399 }
 400
 401 void
 402 print_sigset(struct tcb *tcp, long addr, int rt)
 403 {
 404         sigset_t ss;
 405
 406         if (!addr)
 407                 tprintf("NULL");
 408         else if (copy_sigset(tcp, addr, &ss) < 0)
 409                 tprintf("%#lx", addr);
 410         else
 411                 printsigmask(&ss, rt);
 412 }
 413
 414 #ifdef LINUX
 415
 416 #ifndef ILL_ILLOPC
 417 #define ILL_ILLOPC      1       /* illegal opcode */
 418 #define ILL_ILLOPN      2       /* illegal operand */
 419 #define ILL_ILLADR      3       /* illegal addressing mode */
 420 #define ILL_ILLTRP      4       /* illegal trap */
 421 #define ILL_PRVOPC      5       /* privileged opcode */
 422 #define ILL_PRVREG      6       /* privileged register */
 423 #define ILL_COPROC      7       /* coprocessor error */
 424 #define ILL_BADSTK      8       /* internal stack error */
 425 #define FPE_INTDIV      1       /* integer divide by zero */
 426 #define FPE_INTOVF      2       /* integer overflow */
 427 #define FPE_FLTDIV      3       /* floating point divide by zero */
 428 #define FPE_FLTOVF      4       /* floating point overflow */
 429 #define FPE_FLTUND      5       /* floating point underflow */
 430 #define FPE_FLTRES      6       /* floating point inexact result */
 431 #define FPE_FLTINV      7       /* floating point invalid operation */
 432 #define FPE_FLTSUB      8       /* subscript out of range */
 433 #define SEGV_MAPERR     1       /* address not mapped to object */
 434 #define SEGV_ACCERR     2       /* invalid permissions for mapped object */
 435 #define BUS_ADRALN      1       /* invalid address alignment */
 436 #define BUS_ADRERR      2       /* non-existant physical address */
 437 #define BUS_OBJERR      3       /* object specific hardware error */
 438 #define TRAP_BRKPT      1       /* process breakpoint */
 439 #define TRAP_TRACE      2       /* process trace trap */
 440 #define CLD_EXITED      1       /* child has exited */
 441 #define CLD_KILLED      2       /* child was killed */
 442 #define CLD_DUMPED      3       /* child terminated abnormally */
 443 #define CLD_TRAPPED     4       /* traced child has trapped */
 444 #define CLD_STOPPED     5       /* child has stopped */
 445 #define CLD_CONTINUED   6       /* stopped child has continued */
 446 #define POLL_IN         1       /* data input available */
 447 #define POLL_OUT        2       /* output buffers available */
 448 #define POLL_MSG        3       /* input message available */
 449 #define POLL_ERR        4       /* i/o error */
 450 #define POLL_PRI        5       /* high priority input available */
 451 #define POLL_HUP        6       /* device disconnected */
 452 #define SI_USER         0       /* sent by kill, sigsend, raise */
 453 #define SI_QUEUE        -1      /* sent by sigqueue */
 454 #define SI_TIMER        -2      /* sent by timer expiration */
 455 #define SI_MESGQ        -3      /* sent by real time mesq state change */
 456 #define SI_ASYNCIO      -4      /* sent by AIO completion */
 457 #define SI_SIGIO        -5      /* Sent by SIGIO */
 458 #define SI_TKILL        -6      /* Sent by tkill */
 459 #endif
 460
 461 #if __GLIBC_MINOR__ < 1
 462 /* Type for data associated with a signal.  */
 463 typedef union sigval
 464 {
 465         int sival_int;
 466         void *sival_ptr;
 467 } sigval_t;
 468
 469 # define __SI_MAX_SIZE     128
 470 # define __SI_PAD_SIZE     ((__SI_MAX_SIZE / sizeof (int)) - 3)
 471
 472 typedef struct siginfo
 473 {
 474         int si_signo;               /* Signal number.  */
 475         int si_errno;               /* If non-zero, an errno value associated with
 476                                                                    this signal, as defined in <errno.h>.  */
 477         int si_code;                /* Signal code.  */
 478
 479         union
 480         {
 481                 int _pad[__SI_PAD_SIZE];
 482
 483                 /* kill().  */
 484                 struct
 485                 {
 486                         __pid_t si_pid;     /* Sending process ID.  */
 487                         __uid_t si_uid;     /* Real user ID of sending process.  */
 488                 } _kill;
 489
 490                 /* POSIX.1b timers.  */
 491                 struct
 492                 {
 493                         unsigned int _timer1;
 494                         unsigned int _timer2;
 495                 } _timer;
 496
 497                 /* POSIX.1b signals.  */
 498                 struct
 499                 {
 500                         __pid_t si_pid;     /* Sending process ID.  */
 501                         __uid_t si_uid;     /* Real user ID of sending process.  */
 502                         sigval_t si_sigval; /* Signal value.  */
 503                 } _rt;
 504
 505                 /* SIGCHLD.  */
 506                 struct
 507                 {
 508                         __pid_t si_pid;     /* Which child.  */
 509                         int si_status;      /* Exit value or signal.  */
 510                         __clock_t si_utime;
 511                         __clock_t si_stime;
 512                 } _sigchld;
 513
 514                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS.  */
 515                 struct
 516                 {
 517                         void *si_addr;      /* Faulting insn/memory ref.  */
 518                 } _sigfault;
 519
 520                 /* SIGPOLL.  */
 521                 struct
 522                 {
 523                         int si_band;        /* Band event for SIGPOLL.  */
 524                         int si_fd;
 525                 } _sigpoll;
 526         } _sifields;
 527 } siginfo_t;
 528
 529 #define si_pid          _sifields._kill.si_pid
 530 #define si_uid          _sifields._kill.si_uid
 531 #define si_status       _sifields._sigchld.si_status
 532 #define si_utime        _sifields._sigchld.si_utime
 533 #define si_stime        _sifields._sigchld.si_stime
 534 #define si_value        _sifields._rt.si_sigval
 535 #define si_int          _sifields._rt.si_sigval.sival_int
 536 #define si_ptr          _sifields._rt.si_sigval.sival_ptr
 537 #define si_addr         _sifields._sigfault.si_addr
 538 #define si_band         _sifields._sigpoll.si_band
 539 #define si_fd           _sifields._sigpoll.si_fd
 540
 541 #endif
 542
 543 #endif
 544
 545 #if defined (SVR4) || defined (LINUX)
 546
 547 static const struct xlat siginfo_codes[] = {
 548 #ifdef SI_NOINFO
 549         { SI_NOINFO,    "SI_NOINFO"     },
 550 #endif
 551 #ifdef SI_USER
 552         { SI_USER,      "SI_USER"       },
 553 #endif
 554 #ifdef SI_LWP
 555         { SI_LWP,       "SI_LWP"        },
 556 #endif
 557 #ifdef SI_QUEUE
 558         { SI_QUEUE,     "SI_QUEUE"      },
 559 #endif
 560 #ifdef SI_TIMER
 561         { SI_TIMER,     "SI_TIMER"      },
 562 #endif
 563 #ifdef SI_ASYNCIO
 564         { SI_ASYNCIO,   "SI_ASYNCIO"    },
 565 #endif
 566 #ifdef SI_MESGQ
 567         { SI_MESGQ,     "SI_MESGQ"      },
 568 #endif
 569 #ifdef SI_SIGIO
 570         { SI_SIGIO,     "SI_SIGIO"      },
 571 #endif
 572 #ifdef SI_TKILL
 573         { SI_TKILL,     "SI_TKILL"      },
 574 #endif
 575         { 0,            NULL            },
 576 };
 577
 578 static const struct xlat sigill_codes[] = {
 579         { ILL_ILLOPC,   "ILL_ILLOPC"    },
 580         { ILL_ILLOPN,   "ILL_ILLOPN"    },
 581         { ILL_ILLADR,   "ILL_ILLADR"    },
 582         { ILL_ILLTRP,   "ILL_ILLTRP"    },
 583         { ILL_PRVOPC,   "ILL_PRVOPC"    },
 584         { ILL_PRVREG,   "ILL_PRVREG"    },
 585         { ILL_COPROC,   "ILL_COPROC"    },
 586         { ILL_BADSTK,   "ILL_BADSTK"    },
 587         { 0,            NULL            },
 588 };
 589
 590 static const struct xlat sigfpe_codes[] = {
 591         { FPE_INTDIV,   "FPE_INTDIV"    },
 592         { FPE_INTOVF,   "FPE_INTOVF"    },
 593         { FPE_FLTDIV,   "FPE_FLTDIV"    },
 594         { FPE_FLTOVF,   "FPE_FLTOVF"    },
 595         { FPE_FLTUND,   "FPE_FLTUND"    },
 596         { FPE_FLTRES,   "FPE_FLTRES"    },
 597         { FPE_FLTINV,   "FPE_FLTINV"    },
 598         { FPE_FLTSUB,   "FPE_FLTSUB"    },
 599         { 0,            NULL            },
 600 };
 601
 602 static const struct xlat sigtrap_codes[] = {
 603         { TRAP_BRKPT,   "TRAP_BRKPT"    },
 604         { TRAP_TRACE,   "TRAP_TRACE"    },
 605         { 0,            NULL            },
 606 };
 607
 608 static const struct xlat sigchld_codes[] = {
 609         { CLD_EXITED,   "CLD_EXITED"    },
 610         { CLD_KILLED,   "CLD_KILLED"    },
 611         { CLD_DUMPED,   "CLD_DUMPED"    },
 612         { CLD_TRAPPED,  "CLD_TRAPPED"   },
 613         { CLD_STOPPED,  "CLD_STOPPED"   },
 614         { CLD_CONTINUED,"CLD_CONTINUED" },
 615         { 0,            NULL            },
 616 };
 617
 618 static const struct xlat sigpoll_codes[] = {
 619         { POLL_IN,      "POLL_IN"       },
 620         { POLL_OUT,     "POLL_OUT"      },
 621         { POLL_MSG,     "POLL_MSG"      },
 622         { POLL_ERR,     "POLL_ERR"      },
 623         { POLL_PRI,     "POLL_PRI"      },
 624         { POLL_HUP,     "POLL_HUP"      },
 625         { 0,            NULL            },
 626 };
 627
 628 static const struct xlat sigprof_codes[] = {
 629 #ifdef PROF_SIG
 630         { PROF_SIG,     "PROF_SIG"      },
 631 #endif
 632         { 0,            NULL            },
 633 };
 634
 635 #ifdef SIGEMT
 636 static const struct xlat sigemt_codes[] = {
 637 #ifdef EMT_TAGOVF
 638         { EMT_TAGOVF,   "EMT_TAGOVF"    },
 639 #endif
 640         { 0,            NULL            },
 641 };
 642 #endif
 643
 644 static const struct xlat sigsegv_codes[] = {
 645         { SEGV_MAPERR,  "SEGV_MAPERR"   },
 646         { SEGV_ACCERR,  "SEGV_ACCERR"   },
 647         { 0,            NULL            },
 648 };
 649
 650 static const struct xlat sigbus_codes[] = {
 651         { BUS_ADRALN,   "BUS_ADRALN"    },
 652         { BUS_ADRERR,   "BUS_ADRERR"    },
 653         { BUS_OBJERR,   "BUS_OBJERR"    },
 654         { 0,            NULL            },
 655 };
 656
 657 void
 658 printsiginfo(sip, verbose)
 659 siginfo_t *sip;
 660 int verbose;
 661 {
 662         const char *code;
 663
 664         if (sip->si_signo == 0) {
 665                 tprintf ("{}");
 666                 return;
 667         }
 668         tprintf("{si_signo=");
 669         printsignal(sip->si_signo);
 670         code = xlookup(siginfo_codes, sip->si_code);
 671         if (!code) {
 672                 switch (sip->si_signo) {
 673                 case SIGTRAP:
 674                         code = xlookup(sigtrap_codes, sip->si_code);
 675                         break;
 676                 case SIGCHLD:
 677                         code = xlookup(sigchld_codes, sip->si_code);
 678                         break;
 679                 case SIGPOLL:
 680                         code = xlookup(sigpoll_codes, sip->si_code);
 681                         break;
 682                 case SIGPROF:
 683                         code = xlookup(sigprof_codes, sip->si_code);
 684                         break;
 685                 case SIGILL:
 686                         code = xlookup(sigill_codes, sip->si_code);
 687                         break;
 688 #ifdef SIGEMT
 689                 case SIGEMT:
 690                         code = xlookup(sigemt_codes, sip->si_code);
 691                         break;
 692 #endif
 693                 case SIGFPE:
 694                         code = xlookup(sigfpe_codes, sip->si_code);
 695                         break;
 696                 case SIGSEGV:
 697                         code = xlookup(sigsegv_codes, sip->si_code);
 698                         break;
 699                 case SIGBUS:
 700                         code = xlookup(sigbus_codes, sip->si_code);
 701                         break;
 702                 }
 703         }
 704         if (code)
 705                 tprintf(", si_code=%s", code);
 706         else
 707                 tprintf(", si_code=%#x", sip->si_code);
 708 #ifdef SI_NOINFO
 709         if (sip->si_code != SI_NOINFO)
 710 #endif
 711         {
 712                 if (sip->si_errno) {
 713                         if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
 714                                 tprintf(", si_errno=%d", sip->si_errno);
 715                         else
 716                                 tprintf(", si_errno=%s",
 717                                         errnoent[sip->si_errno]);
 718                 }
 719 #ifdef SI_FROMUSER
 720                 if (SI_FROMUSER(sip)) {
 721                         tprintf(", si_pid=%ld, si_uid=%ld",
 722                                 sip->si_pid, sip->si_uid);
 723 #ifdef SI_QUEUE
 724                         switch (sip->si_code) {
 725                         case SI_QUEUE:
 726 #ifdef SI_TIMER
 727                         case SI_TIMER:
 728 #endif /* SI_QUEUE */
 729                         case SI_ASYNCIO:
 730 #ifdef SI_MESGQ
 731                         case SI_MESGQ:
 732 #endif /* SI_MESGQ */
 733                                 tprintf(", si_value=%d",
 734                                         sip->si_value.sival_int);
 735                                 break;
 736                         }
 737 #endif /* SI_QUEUE */
 738                 }
 739                 else
 740 #endif /* SI_FROMUSER */
 741                 {
 742                         switch (sip->si_signo) {
 743                         case SIGCHLD:
 744                                 tprintf(", si_pid=%ld, si_status=",
 745                                         (long) sip->si_pid);
 746                                 if (sip->si_code == CLD_EXITED)
 747                                         tprintf("%d", sip->si_status);
 748                                 else
 749                                         printsignal(sip->si_status);
 750 #if LINUX
 751                                 if (!verbose)
 752                                         tprintf(", ...");
 753                                 else
 754                                         tprintf(", si_utime=%lu, si_stime=%lu",
 755                                                 sip->si_utime,
 756                                                 sip->si_stime);
 757 #endif
 758                                 break;
 759                         case SIGILL: case SIGFPE:
 760                         case SIGSEGV: case SIGBUS:
 761                                 tprintf(", si_addr=%#lx",
 762                                         (unsigned long) sip->si_addr);
 763                                 break;
 764                         case SIGPOLL:
 765                                 switch (sip->si_code) {
 766                                 case POLL_IN: case POLL_OUT: case POLL_MSG:
 767                                         tprintf(", si_band=%ld",
 768                                                 (long) sip->si_band);
 769                                         break;
 770                                 }
 771                                 break;
 772 #ifdef LINUX
 773                         default:
 774                                 tprintf(", si_pid=%lu, si_uid=%lu, ",
 775                                         (unsigned long) sip->si_pid,
 776                                         (unsigned long) sip->si_uid);
 777                                 if (!verbose)
 778                                         tprintf("...");
 779                                 else {
 780                                         tprintf("si_value={int=%u, ptr=%#lx}",
 781                                                 sip->si_int,
 782                                                 (unsigned long) sip->si_ptr);
 783                                 }
 784 #endif
 785
 786                         }
 787                 }
 788         }
 789         tprintf("}");
 790 }
 791
 792 #endif /* SVR4 || LINUX */
 793
 794 #ifdef LINUX
 795
 796 static void
 797 parse_sigset_t (const char *str, sigset_t *set)
 798 {
 799         const char *p;
 800         unsigned int digit;
 801         int i;
 802
 803         sigemptyset(set);
 804
 805         p = strchr(str, '\n');
 806         if (p == NULL)
 807                 p = strchr(str, '\0');
 808         for (i = 0; p-- > str; i += 4) {
 809                 if (*p >= '0' && *p <= '9')
 810                         digit = *p - '0';
 811                 else if (*p >= 'a' && *p <= 'f')
 812                         digit = *p - 'a' + 10;
 813                 else if (*p >= 'A' && *p <= 'F')
 814                         digit = *p - 'A' + 10;
 815                 else
 816                         break;
 817                 if (digit & 1)
 818                         sigaddset(set, i + 1);
 819                 if (digit & 2)
 820                         sigaddset(set, i + 2);
 821                 if (digit & 4)
 822                         sigaddset(set, i + 3);
 823                 if (digit & 8)
 824                         sigaddset(set, i + 4);
 825         }
 826 }
 827
 828 #endif
 829
 830 /*
 831  * Check process TCP for the disposition of signal SIG.
 832  * Return 1 if the process would somehow manage to  survive signal SIG,
 833  * else return 0.  This routine will never be called with SIGKILL.
 834  */
 835 int
 836 sigishandled(tcp, sig)
 837 struct tcb *tcp;
 838 int sig;
 839 {
 840 #ifdef LINUX
 841         int sfd;
 842         char sname[32];
 843         char buf[2048];
 844         char *s;
 845         int i;
 846         sigset_t ignored, caught;
 847 #endif
 848 #ifdef SVR4
 849         /*
 850          * Since procfs doesn't interfere with wait I think it is safe
 851          * to punt on this question.  If not, the information is there.
 852          */
 853         return 1;
 854 #else /* !SVR4 */
 855         switch (sig) {
 856         case SIGCONT:
 857         case SIGSTOP:
 858         case SIGTSTP:
 859         case SIGTTIN:
 860         case SIGTTOU:
 861         case SIGCHLD:
 862         case SIGIO:
 863 #if defined(SIGURG) && SIGURG != SIGIO
 864         case SIGURG:
 865 #endif
 866         case SIGWINCH:
 867                 /* Gloria Gaynor says ... */
 868                 return 1;
 869         default:
 870                 break;
 871         }
 872 #endif /* !SVR4 */
 873 #ifdef LINUX
 874
 875         /* This is incredibly costly but it's worth it. */
 876         /* NOTE: LinuxThreads internally uses SIGRTMIN, SIGRTMIN + 1 and
 877            SIGRTMIN + 2, so we can't use the obsolete /proc/%d/stat which
 878            doesn't handle real-time signals). */
 879         sprintf(sname, "/proc/%d/status", tcp->pid);
 880         if ((sfd = open(sname, O_RDONLY)) == -1) {
 881                 perror(sname);
 882                 return 1;
 883         }
 884         i = read(sfd, buf, sizeof(buf));
 885         buf[i] = '\0';
 886         close(sfd);
 887         /*
 888          * Skip the extraneous fields. We need to skip
 889          * command name has any spaces in it.  So be it.
 890          */
 891         s = strstr(buf, "SigIgn:\t");
 892         if (!s)
 893         {
 894                 fprintf(stderr, "/proc/pid/status format error\n");
 895                 return 1;
 896         }
 897         parse_sigset_t(s + 8, &ignored);
 898
 899         s = strstr(buf, "SigCgt:\t");
 900         if (!s)
 901         {
 902                 fprintf(stderr, "/proc/pid/status format error\n");
 903                 return 1;
 904         }
 905         parse_sigset_t(s + 8, &caught);
 906
 907 #ifdef DEBUG
 908         fprintf(stderr, "sigs: %016qx %016qx (sig=%d)\n",
 909                 *(long long *) &ignored, *(long long *) &caught, sig);
 910 #endif
 911         if (sigismember(&ignored, sig) || sigismember(&caught, sig))
 912                 return 1;
 913 #endif /* LINUX */
 914
 915 #ifdef SUNOS4
 916         void (*u_signal)();
 917
 918         if (upeek(tcp->pid, uoff(u_signal[0]) + sig*sizeof(u_signal),
 919             (long *) &u_signal) < 0) {
 920                 return 0;
 921         }
 922         if (u_signal != SIG_DFL)
 923                 return 1;
 924 #endif /* SUNOS4 */
 925
 926         return 0;
 927 }
 928
 929 #if defined(SUNOS4) || defined(FREEBSD)
 930
 931 int
 932 sys_sigvec(tcp)
 933 struct tcb *tcp;
 934 {
 935         struct sigvec sv;
 936         long addr;
 937
 938         if (entering(tcp)) {
 939                 printsignal(tcp->u_arg[0]);
 940                 tprintf(", ");
 941                 addr = tcp->u_arg[1];
 942         } else {
 943                 addr = tcp->u_arg[2];
 944         }
 945         if (addr == 0)
 946                 tprintf("NULL");
 947         else if (!verbose(tcp))
 948                 tprintf("%#lx", addr);
 949         else if (umove(tcp, addr, &sv) < 0)
 950                 tprintf("{...}");
 951         else {
 952                 switch ((int) sv.sv_handler) {
 953                 case (int) SIG_ERR:
 954                         tprintf("{SIG_ERR}");
 955                         break;
 956                 case (int) SIG_DFL:
 957                         tprintf("{SIG_DFL}");
 958                         break;
 959                 case (int) SIG_IGN:
 960                         if (tcp->u_arg[0] == SIGTRAP) {
 961                                 tcp->flags |= TCB_SIGTRAPPED;
 962                                 kill(tcp->pid, SIGSTOP);
 963                         }
 964                         tprintf("{SIG_IGN}");
 965                         break;
 966                 case (int) SIG_HOLD:
 967                         if (tcp->u_arg[0] == SIGTRAP) {
 968                                 tcp->flags |= TCB_SIGTRAPPED;
 969                                 kill(tcp->pid, SIGSTOP);
 970                         }
 971                         tprintf("SIG_HOLD");
 972                         break;
 973                 default:
 974                         if (tcp->u_arg[0] == SIGTRAP) {
 975                                 tcp->flags |= TCB_SIGTRAPPED;
 976                                 kill(tcp->pid, SIGSTOP);
 977                         }
 978                         tprintf("{%#lx, ", (unsigned long) sv.sv_handler);
 979                         printsigmask(&sv.sv_mask, 0);
 980                         tprintf(", ");
 981                         printflags(sigvec_flags, sv.sv_flags, "SV_???");
 982                         tprintf("}");
 983                 }
 984         }
 985         if (entering(tcp))
 986                 tprintf(", ");
 987         return 0;
 988 }
 989
 990 int
 991 sys_sigpause(tcp)
 992 struct tcb *tcp;
 993 {
 994         if (entering(tcp)) {    /* WTA: UD had a bug here: he forgot the braces */
 995                 sigset_t sigm;
 996                 long_to_sigset(tcp->u_arg[0], &sigm);
 997                 printsigmask(&sigm, 0);
 998         }
 999         return 0;
1000 }
1001
1002 int
1003 sys_sigstack(tcp)
1004 struct tcb *tcp;
1005 {
1006         struct sigstack ss;
1007         long addr;
1008
1009         if (entering(tcp))
1010                 addr = tcp->u_arg[0];
1011         else
1012                 addr = tcp->u_arg[1];
1013         if (addr == 0)
1014                 tprintf("NULL");
1015         else if (umove(tcp, addr, &ss) < 0)
1016                 tprintf("%#lx", addr);
1017         else {
1018                 tprintf("{ss_sp %#lx ", (unsigned long) ss.ss_sp);
1019                 tprintf("ss_onstack %s}", ss.ss_onstack ? "YES" : "NO");
1020         }
1021         if (entering(tcp))
1022                 tprintf(", ");
1023         return 0;
1024 }
1025
1026 int
1027 sys_sigcleanup(tcp)
1028 struct tcb *tcp;
1029 {
1030         return 0;
1031 }
1032
1033 #endif /* SUNOS4 || FREEBSD */
1034
1035 #ifndef SVR4
1036
1037 int
1038 sys_sigsetmask(tcp)
1039 struct tcb *tcp;
1040 {
1041         if (entering(tcp)) {
1042                 sigset_t sigm;
1043                 long_to_sigset(tcp->u_arg[0], &sigm);
1044                 printsigmask(&sigm, 0);
1045 #ifndef USE_PROCFS
1046                 if ((tcp->u_arg[0] & sigmask(SIGTRAP))) {
1047                         /* Mark attempt to block SIGTRAP */
1048                         tcp->flags |= TCB_SIGTRAPPED;
1049                         /* Send unblockable signal */
1050                         kill(tcp->pid, SIGSTOP);
1051                 }
1052 #endif /* !USE_PROCFS */
1053         }
1054         else if (!syserror(tcp)) {
1055                 sigset_t sigm;
1056                 long_to_sigset(tcp->u_rval, &sigm);
1057                 tcp->auxstr = sprintsigmask("old mask ", &sigm, 0);
1058
1059                 return RVAL_HEX | RVAL_STR;
1060         }
1061         return 0;
1062 }
1063
1064 #if defined(SUNOS4) || defined(FREEBSD)
1065 int
1066 sys_sigblock(tcp)
1067 struct tcb *tcp;
1068 {
1069         return sys_sigsetmask(tcp);
1070 }
1071 #endif /* SUNOS4 || FREEBSD */
1072
1073 #endif /* !SVR4 */
1074
1075 #ifdef HAVE_SIGACTION
1076
1077 #ifdef LINUX
1078 struct old_sigaction {
1079         __sighandler_t __sa_handler;
1080         unsigned long sa_mask;
1081         unsigned long sa_flags;
1082         void (*sa_restorer)(void);
1083 };
1084 #define SA_HANDLER __sa_handler
1085 #endif /* LINUX */
1086
1087 #ifndef SA_HANDLER
1088 #define SA_HANDLER sa_handler
1089 #endif
1090
1091 int
1092 sys_sigaction(tcp)
1093 struct tcb *tcp;
1094 {
1095         long addr;
1096 #ifdef LINUX
1097         sigset_t sigset;
1098         struct old_sigaction sa;
1099 #else
1100         struct sigaction sa;
1101 #endif
1102
1103
1104         if (entering(tcp)) {
1105                 printsignal(tcp->u_arg[0]);
1106                 tprintf(", ");
1107                 addr = tcp->u_arg[1];
1108         } else
1109                 addr = tcp->u_arg[2];
1110         if (addr == 0)
1111                 tprintf("NULL");
1112         else if (!verbose(tcp))
1113                 tprintf("%#lx", addr);
1114         else if (umove(tcp, addr, &sa) < 0)
1115                 tprintf("{...}");
1116         else {
1117                 switch ((long) sa.SA_HANDLER) {
1118                 case (long) SIG_ERR:
1119                         tprintf("{SIG_ERR}");
1120                         break;
1121                 case (long) SIG_DFL:
1122                         tprintf("{SIG_DFL}");
1123                         break;
1124                 case (long) SIG_IGN:
1125 #ifndef USE_PROCFS
1126                         if (tcp->u_arg[0] == SIGTRAP) {
1127                                 tcp->flags |= TCB_SIGTRAPPED;
1128                                 kill(tcp->pid, SIGSTOP);
1129                         }
1130 #endif /* !USE_PROCFS */
1131                         tprintf("{SIG_IGN}");
1132                         break;
1133                 default:
1134 #ifndef USE_PROCFS
1135                         if (tcp->u_arg[0] == SIGTRAP) {
1136                                 tcp->flags |= TCB_SIGTRAPPED;
1137                                 kill(tcp->pid, SIGSTOP);
1138                         }
1139 #endif /* !USE_PROCFS */
1140                         tprintf("{%#lx, ", (long) sa.SA_HANDLER);
1141 #ifndef LINUX
1142                         printsigmask (&sa.sa_mask, 0);
1143 #else
1144                         long_to_sigset(sa.sa_mask, &sigset);
1145                         printsigmask(&sigset, 0);
1146 #endif
1147                         tprintf(", ");
1148                         printflags(sigact_flags, sa.sa_flags, "SA_???");
1149 #ifdef SA_RESTORER
1150                         if (sa.sa_flags & SA_RESTORER)
1151                                 tprintf(", %p", sa.sa_restorer);
1152 #endif
1153                         tprintf("}");
1154                 }
1155         }
1156         if (entering(tcp))
1157                 tprintf(", ");
1158 #ifdef LINUX
1159         else
1160                 tprintf(", %#lx", (unsigned long) sa.sa_restorer);
1161 #endif
1162         return 0;
1163 }
1164
1165 int
1166 sys_signal(tcp)
1167 struct tcb *tcp;
1168 {
1169         if (entering(tcp)) {
1170                 printsignal(tcp->u_arg[0]);
1171                 tprintf(", ");
1172                 switch (tcp->u_arg[1]) {
1173                 case (int) SIG_ERR:
1174                         tprintf("SIG_ERR");
1175                         break;
1176                 case (int) SIG_DFL:
1177                         tprintf("SIG_DFL");
1178                         break;
1179                 case (int) SIG_IGN:
1180 #ifndef USE_PROCFS
1181                         if (tcp->u_arg[0] == SIGTRAP) {
1182                                 tcp->flags |= TCB_SIGTRAPPED;
1183                                 kill(tcp->pid, SIGSTOP);
1184                         }
1185 #endif /* !USE_PROCFS */
1186                         tprintf("SIG_IGN");
1187                         break;
1188                 default:
1189 #ifndef USE_PROCFS
1190                         if (tcp->u_arg[0] == SIGTRAP) {
1191                                 tcp->flags |= TCB_SIGTRAPPED;
1192                                 kill(tcp->pid, SIGSTOP);
1193                         }
1194 #endif /* !USE_PROCFS */
1195                         tprintf("%#lx", tcp->u_arg[1]);
1196                 }
1197                 return 0;
1198         }
1199         else {
1200                 switch (tcp->u_rval) {
1201                     case (int) SIG_ERR:
1202                         tcp->auxstr = "SIG_ERR"; break;
1203                     case (int) SIG_DFL:
1204                         tcp->auxstr = "SIG_DFL"; break;
1205                     case (int) SIG_IGN:
1206                         tcp->auxstr = "SIG_IGN"; break;
1207                     default:
1208                         tcp->auxstr = NULL;
1209                 }
1210                 return RVAL_HEX | RVAL_STR;
1211         }
1212 }
1213
1214 #ifdef SVR4
1215 int
1216 sys_sighold(tcp)
1217 struct tcb *tcp;
1218 {
1219         if (entering(tcp)) {
1220                 printsignal(tcp->u_arg[0]);
1221         }
1222         return 0;
1223 }
1224 #endif /* SVR4 */
1225
1226 #endif /* HAVE_SIGACTION */
1227
1228 #ifdef LINUX
1229
1230 int
1231 sys_sigreturn(tcp)
1232 struct tcb *tcp;
1233 {
1234 #ifdef ARM
1235         struct pt_regs regs;
1236         struct sigcontext_struct sc;
1237
1238         if (entering(tcp)) {
1239                 tcp->u_arg[0] = 0;
1240
1241                 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (void *)&regs) == -1)
1242                         return 0;
1243
1244                 if (umove(tcp, regs.ARM_sp, &sc) < 0)
1245                         return 0;
1246
1247                 tcp->u_arg[0] = 1;
1248                 tcp->u_arg[1] = sc.oldmask;
1249         } else {
1250                 sigset_t sigm;
1251                 long_to_sigset(tcp->u_arg[1], &sigm);
1252                 tcp->u_rval = tcp->u_error = 0;
1253                 if (tcp->u_arg[0] == 0)
1254                         return 0;
1255                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1256                 return RVAL_NONE | RVAL_STR;
1257         }
1258         return 0;
1259 #elif defined(S390) || defined(S390X)
1260         long usp;
1261         struct sigcontext_struct sc;
1262
1263         if (entering(tcp)) {
1264                 tcp->u_arg[0] = 0;
1265                 if (upeek(tcp->pid,PT_GPR15,&usp)<0)
1266                         return 0;
1267                 if (umove(tcp, usp+__SIGNAL_FRAMESIZE, &sc) < 0)
1268                         return 0;
1269                 tcp->u_arg[0] = 1;
1270                 memcpy(&tcp->u_arg[1],&sc.oldmask[0],sizeof(sigset_t));
1271         } else {
1272                 tcp->u_rval = tcp->u_error = 0;
1273                 if (tcp->u_arg[0] == 0)
1274                         return 0;
1275                 tcp->auxstr = sprintsigmask("mask now ",(sigset_t *)&tcp->u_arg[1],0);
1276                 return RVAL_NONE | RVAL_STR;
1277         }
1278         return 0;
1279 #else
1280 #ifdef I386
1281         long esp;
1282         struct sigcontext_struct sc;
1283
1284         if (entering(tcp)) {
1285                 tcp->u_arg[0] = 0;
1286                 if (upeek(tcp->pid, 4*UESP, &esp) < 0)
1287                         return 0;
1288                 if (umove(tcp, esp, &sc) < 0)
1289                         return 0;
1290                 tcp->u_arg[0] = 1;
1291                 tcp->u_arg[1] = sc.oldmask;
1292         }
1293         else {
1294                 sigset_t sigm;
1295                 long_to_sigset(tcp->u_arg[1], &sigm);
1296                 tcp->u_rval = tcp->u_error = 0;
1297                 if (tcp->u_arg[0] == 0)
1298                         return 0;
1299                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1300                 return RVAL_NONE | RVAL_STR;
1301         }
1302         return 0;
1303 #else /* !I386 */
1304 #ifdef IA64
1305         struct sigcontext sc;
1306         long sp;
1307
1308         if (entering(tcp)) {
1309                 /* offset of sigcontext in the kernel's sigframe structure: */
1310 #               define SIGFRAME_SC_OFFSET       0x90
1311                 tcp->u_arg[0] = 0;
1312                 if (upeek(tcp->pid, PT_R12, &sp) < 0)
1313                         return 0;
1314                 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
1315                         return 0;
1316                 tcp->u_arg[0] = 1;
1317                 memcpy(tcp->u_arg + 1, &sc.sc_mask, sizeof(sc.sc_mask));
1318         }
1319         else {
1320                 sigset_t sigm;
1321
1322                 memcpy(&sigm, tcp->u_arg + 1, sizeof (sigm));
1323                 tcp->u_rval = tcp->u_error = 0;
1324                 if (tcp->u_arg[0] == 0)
1325                         return 0;
1326                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1327                 return RVAL_NONE | RVAL_STR;
1328         }
1329         return 0;
1330 #else /* !IA64 */
1331 #ifdef POWERPC
1332         long esp;
1333         struct sigcontext_struct sc;
1334
1335         if (entering(tcp)) {
1336                 tcp->u_arg[0] = 0;
1337                 if (upeek(tcp->pid, sizeof(unsigned long)*PT_R1, &esp) < 0)
1338                         return 0;
1339                 if (umove(tcp, esp, &sc) < 0)
1340                         return 0;
1341                 tcp->u_arg[0] = 1;
1342                 tcp->u_arg[1] = sc.oldmask;
1343         }
1344         else {
1345                 sigset_t sigm;
1346                 long_to_sigset(tcp->u_arg[1], &sigm);
1347                 tcp->u_rval = tcp->u_error = 0;
1348                 if (tcp->u_arg[0] == 0)
1349                         return 0;
1350                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1351                 return RVAL_NONE | RVAL_STR;
1352         }
1353         return 0;
1354 #else /* !POWERPC */
1355 #ifdef M68K
1356         long usp;
1357         struct sigcontext sc;
1358
1359         if (entering(tcp)) {
1360                 tcp->u_arg[0] = 0;
1361                 if (upeek(tcp->pid, 4*PT_USP, &usp) < 0)
1362                         return 0;
1363                 if (umove(tcp, usp, &sc) < 0)
1364                         return 0;
1365                 tcp->u_arg[0] = 1;
1366                 tcp->u_arg[1] = sc.sc_mask;
1367         }
1368         else {
1369                 sigset_t sigm;
1370                 long_to_sigset(tcp->u_arg[1], &sigm);
1371                 tcp->u_rval = tcp->u_error = 0;
1372                 if (tcp->u_arg[0] == 0)
1373                         return 0;
1374                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1375                 return RVAL_NONE | RVAL_STR;
1376         }
1377         return 0;
1378 #else /* !M68K */
1379 #ifdef ALPHA
1380         long fp;
1381         struct sigcontext_struct sc;
1382
1383         if (entering(tcp)) {
1384                 tcp->u_arg[0] = 0;
1385                 if (upeek(tcp->pid, REG_FP, &fp) < 0)
1386                         return 0;
1387                 if (umove(tcp, fp, &sc) < 0)
1388                         return 0;
1389                 tcp->u_arg[0] = 1;
1390                 tcp->u_arg[1] = sc.sc_mask;
1391         }
1392         else {
1393                 sigset_t sigm;
1394                 long_to_sigset(tcp->u_arg[1], &sigm);
1395                 tcp->u_rval = tcp->u_error = 0;
1396                 if (tcp->u_arg[0] == 0)
1397                         return 0;
1398                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1399                 return RVAL_NONE | RVAL_STR;
1400         }
1401         return 0;
1402 #else
1403 #if defined (SPARC) || defined (SPARC64)
1404         long i1;
1405         struct regs regs;
1406         m_siginfo_t si;
1407
1408         if(ptrace(PTRACE_GETREGS, tcp->pid, (char *)&regs, 0) < 0) {
1409                 perror("sigreturn: PTRACE_GETREGS ");
1410                 return 0;
1411         }
1412         if(entering(tcp)) {
1413                 tcp->u_arg[0] = 0;
1414                 i1 = regs.r_o1;
1415                 if(umove(tcp, i1, &si) < 0) {
1416                         perror("sigreturn: umove ");
1417                         return 0;
1418                 }
1419                 tcp->u_arg[0] = 1;
1420                 tcp->u_arg[1] = si.si_mask;
1421         } else {
1422                 sigset_t sigm;
1423                 long_to_sigset(tcp->u_arg[1], &sigm);
1424                 tcp->u_rval = tcp->u_error = 0;
1425                 if(tcp->u_arg[0] == 0)
1426                         return 0;
1427                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1428                 return RVAL_NONE | RVAL_STR;
1429         }
1430         return 0;
1431 #else
1432 #if defined (LINUX_MIPSN32) || defined (LINUX_MIPSN64)
1433         /* This decodes rt_sigreturn.  The 64-bit ABIs do not have
1434            sigreturn.  */
1435         long sp;
1436         struct ucontext uc;
1437
1438         if(entering(tcp)) {
1439                 tcp->u_arg[0] = 0;
1440                 if (upeek(tcp->pid, REG_SP, &sp) < 0)
1441                         return 0;
1442                 /* There are six words followed by a 128-byte siginfo.  */
1443                 sp = sp + 6 * 4 + 128;
1444                 if (umove(tcp, sp, &uc) < 0)
1445                         return 0;
1446                 tcp->u_arg[0] = 1;
1447                 tcp->u_arg[1] = *(long *) &uc.uc_sigmask;
1448         } else {
1449                 sigset_t sigm;
1450                 long_to_sigset(tcp->u_arg[1], &sigm);
1451                 tcp->u_rval = tcp->u_error = 0;
1452                 if(tcp->u_arg[0] == 0)
1453                         return 0;
1454                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1455                 return RVAL_NONE | RVAL_STR;
1456         }
1457         return 0;
1458 #else
1459 #ifdef MIPS
1460         long sp;
1461         struct pt_regs regs;
1462         m_siginfo_t si;
1463
1464         if(ptrace(PTRACE_GETREGS, tcp->pid, (char *)&regs, 0) < 0) {
1465                 perror("sigreturn: PTRACE_GETREGS ");
1466                 return 0;
1467         }
1468         if(entering(tcp)) {
1469                 tcp->u_arg[0] = 0;
1470                 sp = regs.regs[29];
1471                 if (umove(tcp, sp, &si) < 0)
1472                 tcp->u_arg[0] = 1;
1473                 tcp->u_arg[1] = si.si_mask;
1474         } else {
1475                 sigset_t sigm;
1476                 long_to_sigset(tcp->u_arg[1], &sigm);
1477                 tcp->u_rval = tcp->u_error = 0;
1478                 if(tcp->u_arg[0] == 0)
1479                         return 0;
1480                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1481                 return RVAL_NONE | RVAL_STR;
1482         }
1483         return 0;
1484 #else
1485 #warning No sys_sigreturn() for this architecture
1486 #warning         (no problem, just a reminder :-)
1487         return 0;
1488 #endif /* MIPS */
1489 #endif /* LINUX_MIPSN32 || LINUX_MIPSN64 */
1490 #endif /* SPARC || SPARC64 */
1491 #endif /* ALPHA */
1492 #endif /* !M68K */
1493 #endif /* !POWERPC */
1494 #endif /* !IA64 */
1495 #endif /* !I386 */
1496 #endif /* S390 */
1497 }
1498
1499 int
1500 sys_siggetmask(tcp)
1501 struct tcb *tcp;
1502 {
1503         if (exiting(tcp)) {
1504                 sigset_t sigm;
1505                 long_to_sigset(tcp->u_rval, &sigm);
1506                 tcp->auxstr = sprintsigmask("mask ", &sigm, 0);
1507         }
1508         return RVAL_HEX | RVAL_STR;
1509 }
1510
1511 int
1512 sys_sigsuspend(tcp)
1513 struct tcb *tcp;
1514 {
1515         if (entering(tcp)) {
1516                 sigset_t sigm;
1517                 long_to_sigset(tcp->u_arg[2], &sigm);
1518 #if 0
1519                 /* first two are not really arguments, but print them anyway */
1520                 /* nevermind, they are an anachronism now, too bad... */
1521                 tprintf("%d, %#x, ", tcp->u_arg[0], tcp->u_arg[1]);
1522 #endif
1523                 printsigmask(&sigm, 0);
1524         }
1525         return 0;
1526 }
1527
1528 #endif /* LINUX */
1529
1530 #if defined(SVR4) || defined(FREEBSD)
1531
1532 int
1533 sys_sigsuspend(tcp)
1534 struct tcb *tcp;
1535 {
1536         sigset_t sigset;
1537
1538         if (entering(tcp)) {
1539                 if (umove(tcp, tcp->u_arg[0], &sigset) < 0)
1540                         tprintf("[?]");
1541                 else
1542                         printsigmask(&sigset, 0);
1543         }
1544         return 0;
1545 }
1546 #ifndef FREEBSD
1547 static const struct xlat ucontext_flags[] = {
1548         { UC_SIGMASK,   "UC_SIGMASK"    },
1549         { UC_STACK,     "UC_STACK"      },
1550         { UC_CPU,       "UC_CPU"        },
1551 #ifdef UC_FPU
1552         { UC_FPU,       "UC_FPU"        },
1553 #endif
1554 #ifdef UC_INTR
1555         { UC_INTR,      "UC_INTR"       },
1556 #endif
1557         { 0,            NULL            },
1558 };
1559 #endif /* !FREEBSD */
1560 #endif /* SVR4 || FREEBSD */
1561
1562 #if defined SVR4 || defined LINUX || defined FREEBSD
1563 #if defined LINUX && !defined SS_ONSTACK
1564 #define SS_ONSTACK      1
1565 #define SS_DISABLE      2
1566 #if __GLIBC_MINOR__ == 0
1567 typedef struct
1568 {
1569         __ptr_t ss_sp;
1570         int ss_flags;
1571         size_t ss_size;
1572 } stack_t;
1573 #endif
1574 #endif
1575 #ifdef FREEBSD
1576 #define stack_t struct sigaltstack
1577 #endif
1578
1579 static const struct xlat sigaltstack_flags[] = {
1580         { SS_ONSTACK,   "SS_ONSTACK"    },
1581         { SS_DISABLE,   "SS_DISABLE"    },
1582         { 0,            NULL            },
1583 };
1584 #endif
1585
1586 #ifdef SVR4
1587 static void
1588 printcontext(tcp, ucp)
1589 struct tcb *tcp;
1590 ucontext_t *ucp;
1591 {
1592         tprintf("{");
1593         if (!abbrev(tcp)) {
1594                 tprintf("uc_flags=");
1595                 printflags(ucontext_flags, ucp->uc_flags, "UC_???");
1596                 tprintf(", uc_link=%#lx, ", (unsigned long) ucp->uc_link);
1597         }
1598         tprintf("uc_sigmask=");
1599         printsigmask(&ucp->uc_sigmask, 0);
1600         if (!abbrev(tcp)) {
1601                 tprintf(", uc_stack={ss_sp=%#lx, ss_size=%d, ss_flags=",
1602                         (unsigned long) ucp->uc_stack.ss_sp,
1603                         ucp->uc_stack.ss_size);
1604                 printflags(sigaltstack_flags, ucp->uc_stack.ss_flags, "SS_???");
1605                 tprintf("}");
1606         }
1607         tprintf(", ...}");
1608 }
1609
1610 int
1611 sys_getcontext(tcp)
1612 struct tcb *tcp;
1613 {
1614         ucontext_t uc;
1615
1616         if (exiting(tcp)) {
1617                 if (tcp->u_error)
1618                         tprintf("%#lx", tcp->u_arg[0]);
1619                 else if (!tcp->u_arg[0])
1620                         tprintf("NULL");
1621                 else if (umove(tcp, tcp->u_arg[0], &uc) < 0)
1622                         tprintf("{...}");
1623                 else
1624                         printcontext(tcp, &uc);
1625         }
1626         return 0;
1627 }
1628
1629 int
1630 sys_setcontext(tcp)
1631 struct tcb *tcp;
1632 {
1633         ucontext_t uc;
1634
1635         if (entering(tcp)) {
1636                 if (!tcp->u_arg[0])
1637                         tprintf("NULL");
1638                 else if (umove(tcp, tcp->u_arg[0], &uc) < 0)
1639                         tprintf("{...}");
1640                 else
1641                         printcontext(tcp, &uc);
1642         }
1643         else {
1644                 tcp->u_rval = tcp->u_error = 0;
1645                 if (tcp->u_arg[0] == 0)
1646                         return 0;
1647                 return RVAL_NONE;
1648         }
1649         return 0;
1650 }
1651
1652 #endif /* SVR4 */
1653
1654 #if defined(LINUX) || defined(FREEBSD)
1655
1656 static int
1657 print_stack_t(tcp, addr)
1658 struct tcb *tcp;
1659 unsigned long addr;
1660 {
1661         stack_t ss;
1662         if (umove(tcp, addr, &ss) < 0)
1663                 return -1;
1664         tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1665         printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1666         tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1667         return 0;
1668 }
1669
1670 int
1671 sys_sigaltstack(tcp)
1672         struct tcb *tcp;
1673 {
1674         if (entering(tcp)) {
1675                 if (tcp->u_arg[0] == 0)
1676                         tprintf("NULL");
1677                 else if (print_stack_t(tcp, tcp->u_arg[0]) < 0)
1678                         return -1;
1679         }
1680         else {
1681                 tprintf(", ");
1682                 if (tcp->u_arg[1] == 0)
1683                         tprintf("NULL");
1684                 else if (print_stack_t(tcp, tcp->u_arg[1]) < 0)
1685                         return -1;
1686         }
1687         return 0;
1688 }
1689 #endif
1690
1691 #ifdef HAVE_SIGACTION
1692
1693 int
1694 sys_sigprocmask(tcp)
1695 struct tcb *tcp;
1696 {
1697 #ifdef ALPHA
1698         if (entering(tcp)) {
1699                 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1700                 tprintf(", ");
1701                 printsigmask(tcp->u_arg[1], 0);
1702         }
1703         else if (!syserror(tcp)) {
1704                 tcp->auxstr = sprintsigmask("old mask ", tcp->u_rval, 0);
1705                 return RVAL_HEX | RVAL_STR;
1706         }
1707 #else /* !ALPHA */
1708         if (entering(tcp)) {
1709 #ifdef SVR4
1710                 if (tcp->u_arg[0] == 0)
1711                         tprintf("0");
1712                 else
1713 #endif /* SVR4 */
1714                 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1715                 tprintf(", ");
1716                 print_sigset(tcp, tcp->u_arg[1], 0);
1717                 tprintf(", ");
1718         }
1719         else {
1720                 if (!tcp->u_arg[2])
1721                         tprintf("NULL");
1722                 else if (syserror(tcp))
1723                         tprintf("%#lx", tcp->u_arg[2]);
1724                 else
1725                         print_sigset(tcp, tcp->u_arg[2], 0);
1726         }
1727 #endif /* !ALPHA */
1728         return 0;
1729 }
1730
1731 #endif /* HAVE_SIGACTION */
1732
1733 int
1734 sys_kill(tcp)
1735 struct tcb *tcp;
1736 {
1737         if (entering(tcp)) {
1738                 tprintf("%ld, %s", tcp->u_arg[0], signame(tcp->u_arg[1]));
1739         }
1740         return 0;
1741 }
1742
1743 #if defined(FREEBSD) || defined(SUNOS4)
1744 int
1745 sys_killpg(tcp)
1746 struct tcb *tcp;
1747 {
1748         return sys_kill(tcp);
1749 }
1750 #endif /* FREEBSD || SUNOS4 */
1751
1752 #ifdef LINUX
1753 int
1754 sys_tgkill(tcp)
1755         struct tcb *tcp;
1756 {
1757         if (entering(tcp)) {
1758                 tprintf("%ld, %ld, %s",
1759                         tcp->u_arg[0], tcp->u_arg[1], signame(tcp->u_arg[2]));
1760         }
1761         return 0;
1762 }
1763 #endif
1764
1765 int
1766 sys_sigpending(tcp)
1767 struct tcb *tcp;
1768 {
1769         sigset_t sigset;
1770
1771         if (exiting(tcp)) {
1772                 if (syserror(tcp))
1773                         tprintf("%#lx", tcp->u_arg[0]);
1774                 else if (copy_sigset(tcp, tcp->u_arg[0], &sigset) < 0)
1775                         tprintf("[?]");
1776                 else
1777                         printsigmask(&sigset, 0);
1778         }
1779         return 0;
1780 }
1781
1782 #ifdef SVR4
1783 int sys_sigwait(tcp)
1784 struct tcb *tcp;
1785 {
1786         sigset_t sigset;
1787
1788         if (entering(tcp)) {
1789                 if (copy_sigset(tcp, tcp->u_arg[0], &sigset) < 0)
1790                         tprintf("[?]");
1791                 else
1792                         printsigmask(&sigset, 0);
1793         }
1794         else {
1795                 if (!syserror(tcp)) {
1796                         tcp->auxstr = signalent[tcp->u_rval];
1797                         return RVAL_DECIMAL | RVAL_STR;
1798                 }
1799         }
1800         return 0;
1801 }
1802 #endif /* SVR4 */
1803
1804 #ifdef LINUX
1805
1806         int
1807 sys_rt_sigprocmask(tcp)
1808         struct tcb *tcp;
1809 {
1810         sigset_t sigset;
1811
1812         /* Note: arg[3] is the length of the sigset. */
1813         if (entering(tcp)) {
1814                 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1815                 tprintf(", ");
1816                 if (!tcp->u_arg[1])
1817                         tprintf("NULL, ");
1818                 else if (copy_sigset_len(tcp, tcp->u_arg[1], &sigset, tcp->u_arg[3]) < 0)
1819                         tprintf("%#lx, ", tcp->u_arg[1]);
1820                 else {
1821                         printsigmask(&sigset, 1);
1822                         tprintf(", ");
1823                 }
1824         }
1825         else {
1826                 if (!tcp->u_arg[2])
1827
1828                         tprintf("NULL");
1829                 else if (syserror(tcp))
1830                         tprintf("%#lx", tcp->u_arg[2]);
1831                 else if (copy_sigset_len(tcp, tcp->u_arg[2], &sigset, tcp->u_arg[3]) < 0)
1832                         tprintf("[?]");
1833                 else
1834                         printsigmask(&sigset, 1);
1835                 tprintf(", %lu", tcp->u_arg[3]);
1836         }
1837         return 0;
1838 }
1839
1840
1841 /* Structure describing the action to be taken when a signal arrives.  */
1842 struct new_sigaction
1843 {
1844         union
1845         {
1846                 __sighandler_t __sa_handler;
1847                 void (*__sa_sigaction) (int, siginfo_t *, void *);
1848         }
1849         __sigaction_handler;
1850         unsigned long sa_flags;
1851         void (*sa_restorer) (void);
1852         unsigned long int sa_mask[2];
1853 };
1854
1855
1856         int
1857 sys_rt_sigaction(tcp)
1858         struct tcb *tcp;
1859 {
1860         struct new_sigaction sa;
1861         sigset_t sigset;
1862         long addr;
1863
1864         if (entering(tcp)) {
1865                 printsignal(tcp->u_arg[0]);
1866                 tprintf(", ");
1867                 addr = tcp->u_arg[1];
1868         } else
1869                 addr = tcp->u_arg[2];
1870         if (addr == 0)
1871                 tprintf("NULL");
1872         else if (!verbose(tcp))
1873                 tprintf("%#lx", addr);
1874         else if (umove(tcp, addr, &sa) < 0)
1875                 tprintf("{...}");
1876         else {
1877                 switch ((long) sa.__sigaction_handler.__sa_handler) {
1878                         case (long) SIG_ERR:
1879                                 tprintf("{SIG_ERR}");
1880                                 break;
1881                         case (long) SIG_DFL:
1882                                 tprintf("{SIG_DFL}");
1883                                 break;
1884                         case (long) SIG_IGN:
1885                                 tprintf("{SIG_IGN}");
1886                                 break;
1887                         default:
1888                                 tprintf("{%#lx, ",
1889                                                 (long) sa.__sigaction_handler.__sa_handler);
1890                                 sigemptyset(&sigset);
1891 #ifdef LINUXSPARC
1892                                 if (tcp->u_arg[4] <= sizeof(sigset))
1893                                         memcpy(&sigset, &sa.sa_mask, tcp->u_arg[4]);
1894 #else
1895                                 if (tcp->u_arg[3] <= sizeof(sigset))
1896                                         memcpy(&sigset, &sa.sa_mask, tcp->u_arg[3]);
1897 #endif
1898                                 else
1899                                         memcpy(&sigset, &sa.sa_mask, sizeof(sigset));
1900                                 printsigmask(&sigset, 1);
1901                                 tprintf(", ");
1902                                 printflags(sigact_flags, sa.sa_flags, "SA_???");
1903 #ifdef SA_RESTORER
1904                                 if (sa.sa_flags & SA_RESTORER)
1905                                         tprintf(", %p", sa.sa_restorer);
1906 #endif
1907                                 tprintf("}");
1908                 }
1909         }
1910         if (entering(tcp))
1911                 tprintf(", ");
1912         else
1913 #ifdef LINUXSPARC
1914                 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1915 #elif defined(ALPHA)
1916                 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1917 #else
1918                 tprintf(", %lu", addr = tcp->u_arg[3]);
1919 #endif
1920         return 0;
1921 }
1922
1923         int
1924 sys_rt_sigpending(tcp)
1925         struct tcb *tcp;
1926 {
1927         sigset_t sigset;
1928
1929         if (exiting(tcp)) {
1930                 if (syserror(tcp))
1931                         tprintf("%#lx", tcp->u_arg[0]);
1932                 else if (copy_sigset_len(tcp, tcp->u_arg[0],
1933                                          &sigset, tcp->u_arg[1]) < 0)
1934                         tprintf("[?]");
1935                 else
1936                         printsigmask(&sigset, 1);
1937         }
1938         return 0;
1939 }
1940         int
1941 sys_rt_sigsuspend(tcp)
1942         struct tcb *tcp;
1943 {
1944         if (entering(tcp)) {
1945                 sigset_t sigm;
1946                 if (copy_sigset_len(tcp, tcp->u_arg[0], &sigm, tcp->u_arg[1]) < 0)
1947                         tprintf("[?]");
1948                 else
1949                         printsigmask(&sigm, 1);
1950         }
1951         return 0;
1952 }
1953         int
1954 sys_rt_sigqueueinfo(tcp)
1955         struct tcb *tcp;
1956 {
1957         if (entering(tcp)) {
1958                 siginfo_t si;
1959                 tprintf("%lu, ", tcp->u_arg[0]);
1960                 printsignal(tcp->u_arg[1]);
1961                 tprintf(", ");
1962                 if (umove(tcp, tcp->u_arg[2], &si) < 0)
1963                         tprintf("%#lx", tcp->u_arg[2]);
1964                 else
1965                         printsiginfo(&si, verbose (tcp));
1966         }
1967         return 0;
1968 }
1969
1970 int sys_rt_sigtimedwait(tcp)
1971         struct tcb *tcp;
1972 {
1973         if (entering(tcp)) {
1974                 sigset_t sigset;
1975
1976                 if (copy_sigset_len(tcp, tcp->u_arg[0],
1977                                     &sigset, tcp->u_arg[3]) < 0)
1978                         tprintf("[?]");
1979                 else
1980                         printsigmask(&sigset, 1);
1981                 tprintf(", ");
1982         }
1983         else {
1984                 if (syserror(tcp))
1985                         tprintf("%#lx", tcp->u_arg[0]);
1986                 else {
1987                         siginfo_t si;
1988                         if (umove(tcp, tcp->u_arg[1], &si) < 0)
1989                                 tprintf("%#lx", tcp->u_arg[1]);
1990                         else
1991                                 printsiginfo(&si, verbose (tcp));
1992                         /* XXX For now */
1993                         tprintf(", %#lx", tcp->u_arg[2]);
1994                         tprintf(", %d", (int) tcp->u_arg[3]);
1995                 }
1996         }
1997         return 0;
1998 };
1999
2000 int
2001 sys_restart_syscall(tcp)
2002 struct tcb *tcp;
2003 {
2004         if (entering(tcp))
2005                 tprintf("<... resuming interrupted call ...>");
2006         return 0;
2007 }
2008
2009 int
2010 sys_signalfd(tcp)
2011 struct tcb *tcp;
2012 {
2013         if (entering(tcp)) {
2014                 tprintf("%ld, ", tcp->u_arg[0]);
2015                 print_sigset(tcp, tcp->u_arg[1], 1);
2016                 tprintf("%lu", tcp->u_arg[2]);
2017         }
2018         return 0;
2019 }
2020 #endif /* LINUX */