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_NODEFER
 219         { SA_NODEFER,   "SA_NODEFER"    },
 220 #endif
 221 #if defined SA_NOMASK && SA_NODEFER != SA_NOMASK
 222         { SA_NOMASK,    "SA_NOMASK"     },
 223 #endif
 224 #ifdef SA_RESETHAND
 225         { SA_RESETHAND, "SA_RESETHAND"  },
 226 #endif
 227 #if defined SA_ONESHOT && SA_ONESHOT != SA_RESETHAND
 228         { SA_ONESHOT,   "SA_ONESHOT"    },
 229 #endif
 230 #ifdef SA_SIGINFO
 231         { SA_SIGINFO,   "SA_SIGINFO"    },
 232 #endif
 233 #ifdef SA_RESETHAND
 234         { SA_RESETHAND, "SA_RESETHAND"  },
 235 #endif
 236 #ifdef SA_ONSTACK
 237         { SA_ONSTACK,   "SA_ONSTACK"    },
 238 #endif
 239 #ifdef SA_NODEFER
 240         { SA_NODEFER,   "SA_NODEFER"    },
 241 #endif
 242 #ifdef SA_NOCLDSTOP
 243         { SA_NOCLDSTOP, "SA_NOCLDSTOP"  },
 244 #endif
 245 #ifdef SA_NOCLDWAIT
 246         { SA_NOCLDWAIT, "SA_NOCLDWAIT"  },
 247 #endif
 248 #ifdef _SA_BSDCALL
 249         { _SA_BSDCALL,  "_SA_BSDCALL"   },
 250 #endif
 251         { 0,            NULL            },
 252 };
 253
 254 static const struct xlat sigprocmaskcmds[] = {
 255         { SIG_BLOCK,    "SIG_BLOCK"     },
 256         { SIG_UNBLOCK,  "SIG_UNBLOCK"   },
 257         { SIG_SETMASK,  "SIG_SETMASK"   },
 258 #ifdef SIG_SETMASK32
 259         { SIG_SETMASK32,"SIG_SETMASK32" },
 260 #endif
 261         { 0,            NULL            },
 262 };
 263
 264 #endif /* HAVE_SIGACTION */
 265
 266 /* Anonymous realtime signals. */
 267 /* Under glibc 2.1, SIGRTMIN et al are functions, but __SIGRTMIN is a
 268    constant.  This is what we want.  Otherwise, just use SIGRTMIN. */
 269 #ifdef SIGRTMIN
 270 #ifndef __SIGRTMIN
 271 #define __SIGRTMIN SIGRTMIN
 272 #define __SIGRTMAX SIGRTMAX /* likewise */
 273 #endif
 274 #endif
 275
 276 const char *
 277 signame(sig)
 278 int sig;
 279 {
 280         static char buf[30];
 281         if (sig >= 0 && sig < nsignals) {
 282                 return signalent[sig];
 283 #ifdef SIGRTMIN
 284         } else if (sig >= __SIGRTMIN && sig <= __SIGRTMAX) {
 285                 sprintf(buf, "SIGRT_%ld", (long)(sig - __SIGRTMIN));
 286                 return buf;
 287 #endif /* SIGRTMIN */
 288         } else {
 289                 sprintf(buf, "%d", sig);
 290                 return buf;
 291         }
 292 }
 293
 294 #ifndef UNIXWARE
 295 static void
 296 long_to_sigset(l, s)
 297 long l;
 298 sigset_t *s;
 299 {
 300         sigemptyset(s);
 301         *(long *)s = l;
 302 }
 303 #endif
 304
 305 static int
 306 copy_sigset_len(tcp, addr, s, len)
 307 struct tcb *tcp;
 308 long addr;
 309 sigset_t *s;
 310 int len;
 311 {
 312         if (len > sizeof(*s))
 313                 len = sizeof(*s);
 314         sigemptyset(s);
 315         if (umoven(tcp, addr, len, (char *)s) < 0)
 316                 return -1;
 317         return 0;
 318 }
 319
 320 #ifdef LINUX
 321 /* Original sigset is unsigned long */
 322 #define copy_sigset(tcp, addr, s) copy_sigset_len(tcp, addr, s, sizeof(long))
 323 #else
 324 #define copy_sigset(tcp, addr, s) copy_sigset_len(tcp, addr, s, sizeof(sigset_t))
 325 #endif
 326
 327 static const char *
 328 sprintsigmask(const char *str, sigset_t *mask, int rt)
 329 /* set might include realtime sigs */
 330 {
 331         int i, nsigs;
 332         int maxsigs;
 333         char *format, *s;
 334         static char outstr[8 * sizeof(sigset_t) * 8];
 335
 336         strcpy(outstr, str);
 337         s = outstr + strlen(outstr);
 338         nsigs = 0;
 339         maxsigs = nsignals;
 340 #ifdef __SIGRTMAX
 341         if (rt)
 342                 maxsigs = __SIGRTMAX; /* instead */
 343 #endif
 344         for (i = 1; i < maxsigs; i++) {
 345                 if (sigismember(mask, i) == 1)
 346                         nsigs++;
 347         }
 348         if (nsigs >= nsignals * 2 / 3) {
 349                 *s++ = '~';
 350                 for (i = 1; i < maxsigs; i++) {
 351                         switch (sigismember(mask, i)) {
 352                         case 1:
 353                                 sigdelset(mask, i);
 354                                 break;
 355                         case 0:
 356                                 sigaddset(mask, i);
 357                                 break;
 358                         }
 359                 }
 360         }
 361         format = "%s";
 362         *s++ = '[';
 363         for (i = 1; i < maxsigs; i++) {
 364                 if (sigismember(mask, i) == 1) {
 365                         /* real-time signals on solaris don't have
 366                          * signalent entries
 367                          */
 368                         if (i < nsignals) {
 369                                 sprintf(s, format, signalent[i] + 3);
 370                         }
 371 #ifdef SIGRTMIN
 372                         else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
 373                                 char tsig[40];
 374                                 sprintf(tsig, "RT_%u", i - __SIGRTMIN);
 375                                 sprintf(s, format, tsig);
 376                         }
 377 #endif /* SIGRTMIN */
 378                         else {
 379                                 char tsig[32];
 380                                 sprintf(tsig, "%u", i);
 381                                 sprintf(s, format, tsig);
 382                         }
 383                         s += strlen(s);
 384                         format = " %s";
 385                 }
 386         }
 387         *s++ = ']';
 388         *s = '\0';
 389         return outstr;
 390 }
 391
 392 static void
 393 printsigmask(mask, rt)
 394 sigset_t *mask;
 395 int rt;
 396 {
 397         tprintf("%s", sprintsigmask("", mask, rt));
 398 }
 399
 400 void
 401 printsignal(nr)
 402 int nr;
 403 {
 404         tprintf(signame(nr));
 405 }
 406
 407 void
 408 print_sigset(struct tcb *tcp, long addr, int rt)
 409 {
 410         sigset_t ss;
 411
 412         if (!addr)
 413                 tprintf("NULL");
 414         else if (copy_sigset(tcp, addr, &ss) < 0)
 415                 tprintf("%#lx", addr);
 416         else
 417                 printsigmask(&ss, rt);
 418 }
 419
 420 #ifdef LINUX
 421
 422 #ifndef ILL_ILLOPC
 423 #define ILL_ILLOPC      1       /* illegal opcode */
 424 #define ILL_ILLOPN      2       /* illegal operand */
 425 #define ILL_ILLADR      3       /* illegal addressing mode */
 426 #define ILL_ILLTRP      4       /* illegal trap */
 427 #define ILL_PRVOPC      5       /* privileged opcode */
 428 #define ILL_PRVREG      6       /* privileged register */
 429 #define ILL_COPROC      7       /* coprocessor error */
 430 #define ILL_BADSTK      8       /* internal stack error */
 431 #define FPE_INTDIV      1       /* integer divide by zero */
 432 #define FPE_INTOVF      2       /* integer overflow */
 433 #define FPE_FLTDIV      3       /* floating point divide by zero */
 434 #define FPE_FLTOVF      4       /* floating point overflow */
 435 #define FPE_FLTUND      5       /* floating point underflow */
 436 #define FPE_FLTRES      6       /* floating point inexact result */
 437 #define FPE_FLTINV      7       /* floating point invalid operation */
 438 #define FPE_FLTSUB      8       /* subscript out of range */
 439 #define SEGV_MAPERR     1       /* address not mapped to object */
 440 #define SEGV_ACCERR     2       /* invalid permissions for mapped object */
 441 #define BUS_ADRALN      1       /* invalid address alignment */
 442 #define BUS_ADRERR      2       /* non-existant physical address */
 443 #define BUS_OBJERR      3       /* object specific hardware error */
 444 #define TRAP_BRKPT      1       /* process breakpoint */
 445 #define TRAP_TRACE      2       /* process trace trap */
 446 #define CLD_EXITED      1       /* child has exited */
 447 #define CLD_KILLED      2       /* child was killed */
 448 #define CLD_DUMPED      3       /* child terminated abnormally */
 449 #define CLD_TRAPPED     4       /* traced child has trapped */
 450 #define CLD_STOPPED     5       /* child has stopped */
 451 #define CLD_CONTINUED   6       /* stopped child has continued */
 452 #define POLL_IN         1       /* data input available */
 453 #define POLL_OUT        2       /* output buffers available */
 454 #define POLL_MSG        3       /* input message available */
 455 #define POLL_ERR        4       /* i/o error */
 456 #define POLL_PRI        5       /* high priority input available */
 457 #define POLL_HUP        6       /* device disconnected */
 458 #define SI_USER         0       /* sent by kill, sigsend, raise */
 459 #define SI_QUEUE        -1      /* sent by sigqueue */
 460 #define SI_TIMER        -2      /* sent by timer expiration */
 461 #define SI_MESGQ        -3      /* sent by real time mesq state change */
 462 #define SI_ASYNCIO      -4      /* sent by AIO completion */
 463 #define SI_SIGIO        -5      /* Sent by SIGIO */
 464 #define SI_TKILL        -6      /* Sent by tkill */
 465 #endif
 466
 467 #if __GLIBC_MINOR__ < 1
 468 /* Type for data associated with a signal.  */
 469 typedef union sigval
 470 {
 471         int sival_int;
 472         void *sival_ptr;
 473 } sigval_t;
 474
 475 # define __SI_MAX_SIZE     128
 476 # define __SI_PAD_SIZE     ((__SI_MAX_SIZE / sizeof (int)) - 3)
 477
 478 typedef struct siginfo
 479 {
 480         int si_signo;               /* Signal number.  */
 481         int si_errno;               /* If non-zero, an errno value associated with
 482                                                                    this signal, as defined in <errno.h>.  */
 483         int si_code;                /* Signal code.  */
 484
 485         union
 486         {
 487                 int _pad[__SI_PAD_SIZE];
 488
 489                 /* kill().  */
 490                 struct
 491                 {
 492                         __pid_t si_pid;     /* Sending process ID.  */
 493                         __uid_t si_uid;     /* Real user ID of sending process.  */
 494                 } _kill;
 495
 496                 /* POSIX.1b timers.  */
 497                 struct
 498                 {
 499                         unsigned int _timer1;
 500                         unsigned int _timer2;
 501                 } _timer;
 502
 503                 /* POSIX.1b signals.  */
 504                 struct
 505                 {
 506                         __pid_t si_pid;     /* Sending process ID.  */
 507                         __uid_t si_uid;     /* Real user ID of sending process.  */
 508                         sigval_t si_sigval; /* Signal value.  */
 509                 } _rt;
 510
 511                 /* SIGCHLD.  */
 512                 struct
 513                 {
 514                         __pid_t si_pid;     /* Which child.  */
 515                         int si_status;      /* Exit value or signal.  */
 516                         __clock_t si_utime;
 517                         __clock_t si_stime;
 518                 } _sigchld;
 519
 520                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS.  */
 521                 struct
 522                 {
 523                         void *si_addr;      /* Faulting insn/memory ref.  */
 524                 } _sigfault;
 525
 526                 /* SIGPOLL.  */
 527                 struct
 528                 {
 529                         int si_band;        /* Band event for SIGPOLL.  */
 530                         int si_fd;
 531                 } _sigpoll;
 532         } _sifields;
 533 } siginfo_t;
 534
 535 #define si_pid          _sifields._kill.si_pid
 536 #define si_uid          _sifields._kill.si_uid
 537 #define si_status       _sifields._sigchld.si_status
 538 #define si_utime        _sifields._sigchld.si_utime
 539 #define si_stime        _sifields._sigchld.si_stime
 540 #define si_value        _sifields._rt.si_sigval
 541 #define si_int          _sifields._rt.si_sigval.sival_int
 542 #define si_ptr          _sifields._rt.si_sigval.sival_ptr
 543 #define si_addr         _sifields._sigfault.si_addr
 544 #define si_band         _sifields._sigpoll.si_band
 545 #define si_fd           _sifields._sigpoll.si_fd
 546
 547 #endif
 548
 549 #endif
 550
 551 #if defined (SVR4) || defined (LINUX)
 552
 553 static const struct xlat siginfo_codes[] = {
 554 #ifdef SI_NOINFO
 555         { SI_NOINFO,    "SI_NOINFO"     },
 556 #endif
 557 #ifdef SI_USER
 558         { SI_USER,      "SI_USER"       },
 559 #endif
 560 #ifdef SI_LWP
 561         { SI_LWP,       "SI_LWP"        },
 562 #endif
 563 #ifdef SI_QUEUE
 564         { SI_QUEUE,     "SI_QUEUE"      },
 565 #endif
 566 #ifdef SI_TIMER
 567         { SI_TIMER,     "SI_TIMER"      },
 568 #endif
 569 #ifdef SI_ASYNCIO
 570         { SI_ASYNCIO,   "SI_ASYNCIO"    },
 571 #endif
 572 #ifdef SI_MESGQ
 573         { SI_MESGQ,     "SI_MESGQ"      },
 574 #endif
 575 #ifdef SI_SIGIO
 576         { SI_SIGIO,     "SI_SIGIO"      },
 577 #endif
 578 #ifdef SI_TKILL
 579         { SI_TKILL,     "SI_TKILL"      },
 580 #endif
 581         { 0,            NULL            },
 582 };
 583
 584 static const struct xlat sigill_codes[] = {
 585         { ILL_ILLOPC,   "ILL_ILLOPC"    },
 586         { ILL_ILLOPN,   "ILL_ILLOPN"    },
 587         { ILL_ILLADR,   "ILL_ILLADR"    },
 588         { ILL_ILLTRP,   "ILL_ILLTRP"    },
 589         { ILL_PRVOPC,   "ILL_PRVOPC"    },
 590         { ILL_PRVREG,   "ILL_PRVREG"    },
 591         { ILL_COPROC,   "ILL_COPROC"    },
 592         { ILL_BADSTK,   "ILL_BADSTK"    },
 593         { 0,            NULL            },
 594 };
 595
 596 static const struct xlat sigfpe_codes[] = {
 597         { FPE_INTDIV,   "FPE_INTDIV"    },
 598         { FPE_INTOVF,   "FPE_INTOVF"    },
 599         { FPE_FLTDIV,   "FPE_FLTDIV"    },
 600         { FPE_FLTOVF,   "FPE_FLTOVF"    },
 601         { FPE_FLTUND,   "FPE_FLTUND"    },
 602         { FPE_FLTRES,   "FPE_FLTRES"    },
 603         { FPE_FLTINV,   "FPE_FLTINV"    },
 604         { FPE_FLTSUB,   "FPE_FLTSUB"    },
 605         { 0,            NULL            },
 606 };
 607
 608 static const struct xlat sigtrap_codes[] = {
 609         { TRAP_BRKPT,   "TRAP_BRKPT"    },
 610         { TRAP_TRACE,   "TRAP_TRACE"    },
 611         { 0,            NULL            },
 612 };
 613
 614 static const struct xlat sigchld_codes[] = {
 615         { CLD_EXITED,   "CLD_EXITED"    },
 616         { CLD_KILLED,   "CLD_KILLED"    },
 617         { CLD_DUMPED,   "CLD_DUMPED"    },
 618         { CLD_TRAPPED,  "CLD_TRAPPED"   },
 619         { CLD_STOPPED,  "CLD_STOPPED"   },
 620         { CLD_CONTINUED,"CLD_CONTINUED" },
 621         { 0,            NULL            },
 622 };
 623
 624 static const struct xlat sigpoll_codes[] = {
 625         { POLL_IN,      "POLL_IN"       },
 626         { POLL_OUT,     "POLL_OUT"      },
 627         { POLL_MSG,     "POLL_MSG"      },
 628         { POLL_ERR,     "POLL_ERR"      },
 629         { POLL_PRI,     "POLL_PRI"      },
 630         { POLL_HUP,     "POLL_HUP"      },
 631         { 0,            NULL            },
 632 };
 633
 634 static const struct xlat sigprof_codes[] = {
 635 #ifdef PROF_SIG
 636         { PROF_SIG,     "PROF_SIG"      },
 637 #endif
 638         { 0,            NULL            },
 639 };
 640
 641 #ifdef SIGEMT
 642 static const struct xlat sigemt_codes[] = {
 643 #ifdef EMT_TAGOVF
 644         { EMT_TAGOVF,   "EMT_TAGOVF"    },
 645 #endif
 646         { 0,            NULL            },
 647 };
 648 #endif
 649
 650 static const struct xlat sigsegv_codes[] = {
 651         { SEGV_MAPERR,  "SEGV_MAPERR"   },
 652         { SEGV_ACCERR,  "SEGV_ACCERR"   },
 653         { 0,            NULL            },
 654 };
 655
 656 static const struct xlat sigbus_codes[] = {
 657         { BUS_ADRALN,   "BUS_ADRALN"    },
 658         { BUS_ADRERR,   "BUS_ADRERR"    },
 659         { BUS_OBJERR,   "BUS_OBJERR"    },
 660         { 0,            NULL            },
 661 };
 662
 663 void
 664 printsiginfo(sip, verbose)
 665 siginfo_t *sip;
 666 int verbose;
 667 {
 668         const char *code;
 669
 670         if (sip->si_signo == 0) {
 671                 tprintf ("{}");
 672                 return;
 673         }
 674         tprintf("{si_signo=");
 675         printsignal(sip->si_signo);
 676         code = xlookup(siginfo_codes, sip->si_code);
 677         if (!code) {
 678                 switch (sip->si_signo) {
 679                 case SIGTRAP:
 680                         code = xlookup(sigtrap_codes, sip->si_code);
 681                         break;
 682                 case SIGCHLD:
 683                         code = xlookup(sigchld_codes, sip->si_code);
 684                         break;
 685                 case SIGPOLL:
 686                         code = xlookup(sigpoll_codes, sip->si_code);
 687                         break;
 688                 case SIGPROF:
 689                         code = xlookup(sigprof_codes, sip->si_code);
 690                         break;
 691                 case SIGILL:
 692                         code = xlookup(sigill_codes, sip->si_code);
 693                         break;
 694 #ifdef SIGEMT
 695                 case SIGEMT:
 696                         code = xlookup(sigemt_codes, sip->si_code);
 697                         break;
 698 #endif
 699                 case SIGFPE:
 700                         code = xlookup(sigfpe_codes, sip->si_code);
 701                         break;
 702                 case SIGSEGV:
 703                         code = xlookup(sigsegv_codes, sip->si_code);
 704                         break;
 705                 case SIGBUS:
 706                         code = xlookup(sigbus_codes, sip->si_code);
 707                         break;
 708                 }
 709         }
 710         if (code)
 711                 tprintf(", si_code=%s", code);
 712         else
 713                 tprintf(", si_code=%#x", sip->si_code);
 714 #ifdef SI_NOINFO
 715         if (sip->si_code != SI_NOINFO)
 716 #endif
 717         {
 718                 if (sip->si_errno) {
 719                         if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
 720                                 tprintf(", si_errno=%d", sip->si_errno);
 721                         else
 722                                 tprintf(", si_errno=%s",
 723                                         errnoent[sip->si_errno]);
 724                 }
 725 #ifdef SI_FROMUSER
 726                 if (SI_FROMUSER(sip)) {
 727                         tprintf(", si_pid=%ld, si_uid=%ld",
 728                                 sip->si_pid, sip->si_uid);
 729 #ifdef SI_QUEUE
 730                         switch (sip->si_code) {
 731                         case SI_QUEUE:
 732 #ifdef SI_TIMER
 733                         case SI_TIMER:
 734 #endif /* SI_QUEUE */
 735                         case SI_ASYNCIO:
 736 #ifdef SI_MESGQ
 737                         case SI_MESGQ:
 738 #endif /* SI_MESGQ */
 739                                 tprintf(", si_value=%d",
 740                                         sip->si_value.sival_int);
 741                                 break;
 742                         }
 743 #endif /* SI_QUEUE */
 744                 }
 745                 else
 746 #endif /* SI_FROMUSER */
 747                 {
 748                         switch (sip->si_signo) {
 749                         case SIGCHLD:
 750                                 tprintf(", si_pid=%ld, si_status=",
 751                                         (long) sip->si_pid);
 752                                 if (sip->si_code == CLD_EXITED)
 753                                         tprintf("%d", sip->si_status);
 754                                 else
 755                                         printsignal(sip->si_status);
 756 #if LINUX
 757                                 if (!verbose)
 758                                         tprintf(", ...");
 759                                 else
 760                                         tprintf(", si_utime=%lu, si_stime=%lu",
 761                                                 sip->si_utime,
 762                                                 sip->si_stime);
 763 #endif
 764                                 break;
 765                         case SIGILL: case SIGFPE:
 766                         case SIGSEGV: case SIGBUS:
 767                                 tprintf(", si_addr=%#lx",
 768                                         (unsigned long) sip->si_addr);
 769                                 break;
 770                         case SIGPOLL:
 771                                 switch (sip->si_code) {
 772                                 case POLL_IN: case POLL_OUT: case POLL_MSG:
 773                                         tprintf(", si_band=%ld",
 774                                                 (long) sip->si_band);
 775                                         break;
 776                                 }
 777                                 break;
 778 #ifdef LINUX
 779                         default:
 780                                 tprintf(", si_pid=%lu, si_uid=%lu, ",
 781                                         (unsigned long) sip->si_pid,
 782                                         (unsigned long) sip->si_uid);
 783                                 if (!verbose)
 784                                         tprintf("...");
 785                                 else {
 786                                         tprintf("si_value={int=%u, ptr=%#lx}",
 787                                                 sip->si_int,
 788                                                 (unsigned long) sip->si_ptr);
 789                                 }
 790 #endif
 791
 792                         }
 793                 }
 794         }
 795         tprintf("}");
 796 }
 797
 798 #endif /* SVR4 || LINUX */
 799
 800 #ifdef LINUX
 801
 802 static void
 803 parse_sigset_t (const char *str, sigset_t *set)
 804 {
 805         const char *p;
 806         unsigned int digit;
 807         int i;
 808
 809         sigemptyset(set);
 810
 811         p = strchr(str, '\n');
 812         if (p == NULL)
 813                 p = strchr(str, '\0');
 814         for (i = 0; p-- > str; i += 4) {
 815                 if (*p >= '0' && *p <= '9')
 816                         digit = *p - '0';
 817                 else if (*p >= 'a' && *p <= 'f')
 818                         digit = *p - 'a' + 10;
 819                 else if (*p >= 'A' && *p <= 'F')
 820                         digit = *p - 'A' + 10;
 821                 else
 822                         break;
 823                 if (digit & 1)
 824                         sigaddset(set, i + 1);
 825                 if (digit & 2)
 826                         sigaddset(set, i + 2);
 827                 if (digit & 4)
 828                         sigaddset(set, i + 3);
 829                 if (digit & 8)
 830                         sigaddset(set, i + 4);
 831         }
 832 }
 833
 834 #endif
 835
 836 /*
 837  * Check process TCP for the disposition of signal SIG.
 838  * Return 1 if the process would somehow manage to  survive signal SIG,
 839  * else return 0.  This routine will never be called with SIGKILL.
 840  */
 841 int
 842 sigishandled(tcp, sig)
 843 struct tcb *tcp;
 844 int sig;
 845 {
 846 #ifdef LINUX
 847         int sfd;
 848         char sname[32];
 849         char buf[2048];
 850         char *s;
 851         int i;
 852         sigset_t ignored, caught;
 853 #endif
 854 #ifdef SVR4
 855         /*
 856          * Since procfs doesn't interfere with wait I think it is safe
 857          * to punt on this question.  If not, the information is there.
 858          */
 859         return 1;
 860 #else /* !SVR4 */
 861         switch (sig) {
 862         case SIGCONT:
 863         case SIGSTOP:
 864         case SIGTSTP:
 865         case SIGTTIN:
 866         case SIGTTOU:
 867         case SIGCHLD:
 868         case SIGIO:
 869 #if defined(SIGURG) && SIGURG != SIGIO
 870         case SIGURG:
 871 #endif
 872         case SIGWINCH:
 873                 /* Gloria Gaynor says ... */
 874                 return 1;
 875         default:
 876                 break;
 877         }
 878 #endif /* !SVR4 */
 879 #ifdef LINUX
 880
 881         /* This is incredibly costly but it's worth it. */
 882         /* NOTE: LinuxThreads internally uses SIGRTMIN, SIGRTMIN + 1 and
 883            SIGRTMIN + 2, so we can't use the obsolete /proc/%d/stat which
 884            doesn't handle real-time signals). */
 885         sprintf(sname, "/proc/%d/status", tcp->pid);
 886         if ((sfd = open(sname, O_RDONLY)) == -1) {
 887                 perror(sname);
 888                 return 1;
 889         }
 890         i = read(sfd, buf, sizeof(buf));
 891         buf[i] = '\0';
 892         close(sfd);
 893         /*
 894          * Skip the extraneous fields. We need to skip
 895          * command name has any spaces in it.  So be it.
 896          */
 897         s = strstr(buf, "SigIgn:\t");
 898         if (!s)
 899         {
 900                 fprintf(stderr, "/proc/pid/status format error\n");
 901                 return 1;
 902         }
 903         parse_sigset_t(s + 8, &ignored);
 904
 905         s = strstr(buf, "SigCgt:\t");
 906         if (!s)
 907         {
 908                 fprintf(stderr, "/proc/pid/status format error\n");
 909                 return 1;
 910         }
 911         parse_sigset_t(s + 8, &caught);
 912
 913 #ifdef DEBUG
 914         fprintf(stderr, "sigs: %016qx %016qx (sig=%d)\n",
 915                 *(long long *) &ignored, *(long long *) &caught, sig);
 916 #endif
 917         if (sigismember(&ignored, sig) || sigismember(&caught, sig))
 918                 return 1;
 919 #endif /* LINUX */
 920
 921 #ifdef SUNOS4
 922         void (*u_signal)();
 923
 924         if (upeek(tcp->pid, uoff(u_signal[0]) + sig*sizeof(u_signal),
 925             (long *) &u_signal) < 0) {
 926                 return 0;
 927         }
 928         if (u_signal != SIG_DFL)
 929                 return 1;
 930 #endif /* SUNOS4 */
 931
 932         return 0;
 933 }
 934
 935 #if defined(SUNOS4) || defined(FREEBSD)
 936
 937 int
 938 sys_sigvec(tcp)
 939 struct tcb *tcp;
 940 {
 941         struct sigvec sv;
 942         long addr;
 943
 944         if (entering(tcp)) {
 945                 printsignal(tcp->u_arg[0]);
 946                 tprintf(", ");
 947                 addr = tcp->u_arg[1];
 948         } else {
 949                 addr = tcp->u_arg[2];
 950         }
 951         if (addr == 0)
 952                 tprintf("NULL");
 953         else if (!verbose(tcp))
 954                 tprintf("%#lx", addr);
 955         else if (umove(tcp, addr, &sv) < 0)
 956                 tprintf("{...}");
 957         else {
 958                 switch ((int) sv.sv_handler) {
 959                 case (int) SIG_ERR:
 960                         tprintf("{SIG_ERR}");
 961                         break;
 962                 case (int) SIG_DFL:
 963                         tprintf("{SIG_DFL}");
 964                         break;
 965                 case (int) SIG_IGN:
 966                         if (tcp->u_arg[0] == SIGTRAP) {
 967                                 tcp->flags |= TCB_SIGTRAPPED;
 968                                 kill(tcp->pid, SIGSTOP);
 969                         }
 970                         tprintf("{SIG_IGN}");
 971                         break;
 972                 case (int) SIG_HOLD:
 973                         if (tcp->u_arg[0] == SIGTRAP) {
 974                                 tcp->flags |= TCB_SIGTRAPPED;
 975                                 kill(tcp->pid, SIGSTOP);
 976                         }
 977                         tprintf("SIG_HOLD");
 978                         break;
 979                 default:
 980                         if (tcp->u_arg[0] == SIGTRAP) {
 981                                 tcp->flags |= TCB_SIGTRAPPED;
 982                                 kill(tcp->pid, SIGSTOP);
 983                         }
 984                         tprintf("{%#lx, ", (unsigned long) sv.sv_handler);
 985                         printsigmask(&sv.sv_mask, 0);
 986                         tprintf(", ");
 987                         printflags(sigvec_flags, sv.sv_flags, "SV_???");
 988                         tprintf("}");
 989                 }
 990         }
 991         if (entering(tcp))
 992                 tprintf(", ");
 993         return 0;
 994 }
 995
 996 int
 997 sys_sigpause(tcp)
 998 struct tcb *tcp;
 999 {
1000         if (entering(tcp)) {    /* WTA: UD had a bug here: he forgot the braces */
1001                 sigset_t sigm;
1002                 long_to_sigset(tcp->u_arg[0], &sigm);
1003                 printsigmask(&sigm, 0);
1004         }
1005         return 0;
1006 }
1007
1008 int
1009 sys_sigstack(tcp)
1010 struct tcb *tcp;
1011 {
1012         struct sigstack ss;
1013         long addr;
1014
1015         if (entering(tcp))
1016                 addr = tcp->u_arg[0];
1017         else
1018                 addr = tcp->u_arg[1];
1019         if (addr == 0)
1020                 tprintf("NULL");
1021         else if (umove(tcp, addr, &ss) < 0)
1022                 tprintf("%#lx", addr);
1023         else {
1024                 tprintf("{ss_sp %#lx ", (unsigned long) ss.ss_sp);
1025                 tprintf("ss_onstack %s}", ss.ss_onstack ? "YES" : "NO");
1026         }
1027         if (entering(tcp))
1028                 tprintf(", ");
1029         return 0;
1030 }
1031
1032 int
1033 sys_sigcleanup(tcp)
1034 struct tcb *tcp;
1035 {
1036         return 0;
1037 }
1038
1039 #endif /* SUNOS4 || FREEBSD */
1040
1041 #ifndef SVR4
1042
1043 int
1044 sys_sigsetmask(tcp)
1045 struct tcb *tcp;
1046 {
1047         if (entering(tcp)) {
1048                 sigset_t sigm;
1049                 long_to_sigset(tcp->u_arg[0], &sigm);
1050                 printsigmask(&sigm, 0);
1051 #ifndef USE_PROCFS
1052                 if ((tcp->u_arg[0] & sigmask(SIGTRAP))) {
1053                         /* Mark attempt to block SIGTRAP */
1054                         tcp->flags |= TCB_SIGTRAPPED;
1055                         /* Send unblockable signal */
1056                         kill(tcp->pid, SIGSTOP);
1057                 }
1058 #endif /* !USE_PROCFS */
1059         }
1060         else if (!syserror(tcp)) {
1061                 sigset_t sigm;
1062                 long_to_sigset(tcp->u_rval, &sigm);
1063                 tcp->auxstr = sprintsigmask("old mask ", &sigm, 0);
1064
1065                 return RVAL_HEX | RVAL_STR;
1066         }
1067         return 0;
1068 }
1069
1070 #if defined(SUNOS4) || defined(FREEBSD)
1071 int
1072 sys_sigblock(tcp)
1073 struct tcb *tcp;
1074 {
1075         return sys_sigsetmask(tcp);
1076 }
1077 #endif /* SUNOS4 || FREEBSD */
1078
1079 #endif /* !SVR4 */
1080
1081 #ifdef HAVE_SIGACTION
1082
1083 #ifdef LINUX
1084 struct old_sigaction {
1085         __sighandler_t __sa_handler;
1086         unsigned long sa_mask;
1087         unsigned long sa_flags;
1088         void (*sa_restorer)(void);
1089 };
1090 #define SA_HANDLER __sa_handler
1091 #endif /* LINUX */
1092
1093 #ifndef SA_HANDLER
1094 #define SA_HANDLER sa_handler
1095 #endif
1096
1097 int
1098 sys_sigaction(tcp)
1099 struct tcb *tcp;
1100 {
1101         long addr;
1102 #ifdef LINUX
1103         sigset_t sigset;
1104         struct old_sigaction sa;
1105 #else
1106         struct sigaction sa;
1107 #endif
1108
1109
1110         if (entering(tcp)) {
1111                 printsignal(tcp->u_arg[0]);
1112                 tprintf(", ");
1113                 addr = tcp->u_arg[1];
1114         } else
1115                 addr = tcp->u_arg[2];
1116         if (addr == 0)
1117                 tprintf("NULL");
1118         else if (!verbose(tcp))
1119                 tprintf("%#lx", addr);
1120         else if (umove(tcp, addr, &sa) < 0)
1121                 tprintf("{...}");
1122         else {
1123                 if (sa.SA_HANDLER == SIG_ERR)
1124                         tprintf("{SIG_ERR, ");
1125                 else if (sa.SA_HANDLER == SIG_DFL)
1126                         tprintf("{SIG_DFL, ");
1127                 else if (sa.SA_HANDLER == SIG_DFL) {
1128 #ifndef USE_PROCFS
1129                         if (tcp->u_arg[0] == SIGTRAP) {
1130                                 tcp->flags |= TCB_SIGTRAPPED;
1131                                 kill(tcp->pid, SIGSTOP);
1132                         }
1133 #endif /* !USE_PROCFS */
1134                         tprintf("{SIG_IGN, ");
1135                 }
1136                 else {
1137 #ifndef USE_PROCFS
1138                         if (tcp->u_arg[0] == SIGTRAP) {
1139                                 tcp->flags |= TCB_SIGTRAPPED;
1140                                 kill(tcp->pid, SIGSTOP);
1141                         }
1142 #endif /* !USE_PROCFS */
1143                         tprintf("{%#lx, ", (long) sa.SA_HANDLER);
1144 #ifndef LINUX
1145                         printsigmask (&sa.sa_mask, 0);
1146 #else
1147                         long_to_sigset(sa.sa_mask, &sigset);
1148                         printsigmask(&sigset, 0);
1149 #endif
1150                         tprintf(", ");
1151                         printflags(sigact_flags, sa.sa_flags, "SA_???");
1152 #ifdef SA_RESTORER
1153                         if (sa.sa_flags & SA_RESTORER)
1154                                 tprintf(", %p", sa.sa_restorer);
1155 #endif
1156                         tprintf("}");
1157                 }
1158         }
1159         if (entering(tcp))
1160                 tprintf(", ");
1161 #ifdef LINUX
1162         else
1163                 tprintf(", %#lx", (unsigned long) sa.sa_restorer);
1164 #endif
1165         return 0;
1166 }
1167
1168 int
1169 sys_signal(tcp)
1170 struct tcb *tcp;
1171 {
1172         if (entering(tcp)) {
1173                 printsignal(tcp->u_arg[0]);
1174                 tprintf(", ");
1175                 switch (tcp->u_arg[1]) {
1176                 case (long) SIG_ERR:
1177                         tprintf("SIG_ERR");
1178                         break;
1179                 case (long) SIG_DFL:
1180                         tprintf("SIG_DFL");
1181                         break;
1182                 case (long) SIG_IGN:
1183 #ifndef USE_PROCFS
1184                         if (tcp->u_arg[0] == SIGTRAP) {
1185                                 tcp->flags |= TCB_SIGTRAPPED;
1186                                 kill(tcp->pid, SIGSTOP);
1187                         }
1188 #endif /* !USE_PROCFS */
1189                         tprintf("SIG_IGN");
1190                         break;
1191                 default:
1192 #ifndef USE_PROCFS
1193                         if (tcp->u_arg[0] == SIGTRAP) {
1194                                 tcp->flags |= TCB_SIGTRAPPED;
1195                                 kill(tcp->pid, SIGSTOP);
1196                         }
1197 #endif /* !USE_PROCFS */
1198                         tprintf("%#lx", tcp->u_arg[1]);
1199                 }
1200                 return 0;
1201         }
1202         else if (!syserror(tcp)) {
1203                 switch (tcp->u_rval) {
1204                     case (long) SIG_ERR:
1205                         tcp->auxstr = "SIG_ERR"; break;
1206                     case (long) SIG_DFL:
1207                         tcp->auxstr = "SIG_DFL"; break;
1208                     case (long) SIG_IGN:
1209                         tcp->auxstr = "SIG_IGN"; break;
1210                     default:
1211                         tcp->auxstr = NULL;
1212                 }
1213                 return RVAL_HEX | RVAL_STR;
1214         }
1215         return 0;
1216 }
1217
1218 #ifdef SVR4
1219 int
1220 sys_sighold(tcp)
1221 struct tcb *tcp;
1222 {
1223         if (entering(tcp)) {
1224                 printsignal(tcp->u_arg[0]);
1225         }
1226         return 0;
1227 }
1228 #endif /* SVR4 */
1229
1230 #endif /* HAVE_SIGACTION */
1231
1232 #ifdef LINUX
1233
1234 int
1235 sys_sigreturn(tcp)
1236 struct tcb *tcp;
1237 {
1238 #ifdef ARM
1239         struct pt_regs regs;
1240         struct sigcontext_struct sc;
1241
1242         if (entering(tcp)) {
1243                 tcp->u_arg[0] = 0;
1244
1245                 if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (void *)&regs) == -1)
1246                         return 0;
1247
1248                 if (umove(tcp, regs.ARM_sp, &sc) < 0)
1249                         return 0;
1250
1251                 tcp->u_arg[0] = 1;
1252                 tcp->u_arg[1] = sc.oldmask;
1253         } else {
1254                 sigset_t sigm;
1255                 long_to_sigset(tcp->u_arg[1], &sigm);
1256                 tcp->u_rval = tcp->u_error = 0;
1257                 if (tcp->u_arg[0] == 0)
1258                         return 0;
1259                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1260                 return RVAL_NONE | RVAL_STR;
1261         }
1262         return 0;
1263 #elif defined(S390) || defined(S390X)
1264         long usp;
1265         struct sigcontext_struct sc;
1266
1267         if (entering(tcp)) {
1268                 tcp->u_arg[0] = 0;
1269                 if (upeek(tcp->pid,PT_GPR15,&usp)<0)
1270                         return 0;
1271                 if (umove(tcp, usp+__SIGNAL_FRAMESIZE, &sc) < 0)
1272                         return 0;
1273                 tcp->u_arg[0] = 1;
1274                 memcpy(&tcp->u_arg[1],&sc.oldmask[0],sizeof(sigset_t));
1275         } else {
1276                 tcp->u_rval = tcp->u_error = 0;
1277                 if (tcp->u_arg[0] == 0)
1278                         return 0;
1279                 tcp->auxstr = sprintsigmask("mask now ",(sigset_t *)&tcp->u_arg[1],0);
1280                 return RVAL_NONE | RVAL_STR;
1281         }
1282         return 0;
1283 #else
1284 #ifdef I386
1285         long esp;
1286         struct sigcontext_struct sc;
1287
1288         if (entering(tcp)) {
1289                 tcp->u_arg[0] = 0;
1290                 if (upeek(tcp->pid, 4*UESP, &esp) < 0)
1291                         return 0;
1292                 if (umove(tcp, esp, &sc) < 0)
1293                         return 0;
1294                 tcp->u_arg[0] = 1;
1295                 tcp->u_arg[1] = sc.oldmask;
1296         }
1297         else {
1298                 sigset_t sigm;
1299                 long_to_sigset(tcp->u_arg[1], &sigm);
1300                 tcp->u_rval = tcp->u_error = 0;
1301                 if (tcp->u_arg[0] == 0)
1302                         return 0;
1303                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1304                 return RVAL_NONE | RVAL_STR;
1305         }
1306         return 0;
1307 #else /* !I386 */
1308 #ifdef IA64
1309         struct sigcontext sc;
1310         long sp;
1311
1312         if (entering(tcp)) {
1313                 /* offset of sigcontext in the kernel's sigframe structure: */
1314 #               define SIGFRAME_SC_OFFSET       0x90
1315                 tcp->u_arg[0] = 0;
1316                 if (upeek(tcp->pid, PT_R12, &sp) < 0)
1317                         return 0;
1318                 if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
1319                         return 0;
1320                 tcp->u_arg[0] = 1;
1321                 memcpy(tcp->u_arg + 1, &sc.sc_mask, sizeof(sc.sc_mask));
1322         }
1323         else {
1324                 sigset_t sigm;
1325
1326                 memcpy(&sigm, tcp->u_arg + 1, sizeof (sigm));
1327                 tcp->u_rval = tcp->u_error = 0;
1328                 if (tcp->u_arg[0] == 0)
1329                         return 0;
1330                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1331                 return RVAL_NONE | RVAL_STR;
1332         }
1333         return 0;
1334 #else /* !IA64 */
1335 #ifdef POWERPC
1336         long esp;
1337         struct sigcontext_struct sc;
1338
1339         if (entering(tcp)) {
1340                 tcp->u_arg[0] = 0;
1341                 if (upeek(tcp->pid, sizeof(unsigned long)*PT_R1, &esp) < 0)
1342                         return 0;
1343                 if (umove(tcp, esp, &sc) < 0)
1344                         return 0;
1345                 tcp->u_arg[0] = 1;
1346                 tcp->u_arg[1] = sc.oldmask;
1347         }
1348         else {
1349                 sigset_t sigm;
1350                 long_to_sigset(tcp->u_arg[1], &sigm);
1351                 tcp->u_rval = tcp->u_error = 0;
1352                 if (tcp->u_arg[0] == 0)
1353                         return 0;
1354                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1355                 return RVAL_NONE | RVAL_STR;
1356         }
1357         return 0;
1358 #else /* !POWERPC */
1359 #ifdef M68K
1360         long usp;
1361         struct sigcontext sc;
1362
1363         if (entering(tcp)) {
1364                 tcp->u_arg[0] = 0;
1365                 if (upeek(tcp->pid, 4*PT_USP, &usp) < 0)
1366                         return 0;
1367                 if (umove(tcp, usp, &sc) < 0)
1368                         return 0;
1369                 tcp->u_arg[0] = 1;
1370                 tcp->u_arg[1] = sc.sc_mask;
1371         }
1372         else {
1373                 sigset_t sigm;
1374                 long_to_sigset(tcp->u_arg[1], &sigm);
1375                 tcp->u_rval = tcp->u_error = 0;
1376                 if (tcp->u_arg[0] == 0)
1377                         return 0;
1378                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1379                 return RVAL_NONE | RVAL_STR;
1380         }
1381         return 0;
1382 #else /* !M68K */
1383 #ifdef ALPHA
1384         long fp;
1385         struct sigcontext_struct sc;
1386
1387         if (entering(tcp)) {
1388                 tcp->u_arg[0] = 0;
1389                 if (upeek(tcp->pid, REG_FP, &fp) < 0)
1390                         return 0;
1391                 if (umove(tcp, fp, &sc) < 0)
1392                         return 0;
1393                 tcp->u_arg[0] = 1;
1394                 tcp->u_arg[1] = sc.sc_mask;
1395         }
1396         else {
1397                 sigset_t sigm;
1398                 long_to_sigset(tcp->u_arg[1], &sigm);
1399                 tcp->u_rval = tcp->u_error = 0;
1400                 if (tcp->u_arg[0] == 0)
1401                         return 0;
1402                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1403                 return RVAL_NONE | RVAL_STR;
1404         }
1405         return 0;
1406 #else
1407 #if defined (SPARC) || defined (SPARC64)
1408         long i1;
1409         struct regs regs;
1410         m_siginfo_t si;
1411
1412         if(ptrace(PTRACE_GETREGS, tcp->pid, (char *)&regs, 0) < 0) {
1413                 perror("sigreturn: PTRACE_GETREGS ");
1414                 return 0;
1415         }
1416         if(entering(tcp)) {
1417                 tcp->u_arg[0] = 0;
1418                 i1 = regs.r_o1;
1419                 if(umove(tcp, i1, &si) < 0) {
1420                         perror("sigreturn: umove ");
1421                         return 0;
1422                 }
1423                 tcp->u_arg[0] = 1;
1424                 tcp->u_arg[1] = si.si_mask;
1425         } else {
1426                 sigset_t sigm;
1427                 long_to_sigset(tcp->u_arg[1], &sigm);
1428                 tcp->u_rval = tcp->u_error = 0;
1429                 if(tcp->u_arg[0] == 0)
1430                         return 0;
1431                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1432                 return RVAL_NONE | RVAL_STR;
1433         }
1434         return 0;
1435 #else
1436 #if defined (LINUX_MIPSN32) || defined (LINUX_MIPSN64)
1437         /* This decodes rt_sigreturn.  The 64-bit ABIs do not have
1438            sigreturn.  */
1439         long sp;
1440         struct ucontext uc;
1441
1442         if(entering(tcp)) {
1443                 tcp->u_arg[0] = 0;
1444                 if (upeek(tcp->pid, REG_SP, &sp) < 0)
1445                         return 0;
1446                 /* There are six words followed by a 128-byte siginfo.  */
1447                 sp = sp + 6 * 4 + 128;
1448                 if (umove(tcp, sp, &uc) < 0)
1449                         return 0;
1450                 tcp->u_arg[0] = 1;
1451                 tcp->u_arg[1] = *(long *) &uc.uc_sigmask;
1452         } else {
1453                 sigset_t sigm;
1454                 long_to_sigset(tcp->u_arg[1], &sigm);
1455                 tcp->u_rval = tcp->u_error = 0;
1456                 if(tcp->u_arg[0] == 0)
1457                         return 0;
1458                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1459                 return RVAL_NONE | RVAL_STR;
1460         }
1461         return 0;
1462 #else
1463 #ifdef MIPS
1464         long sp;
1465         struct pt_regs regs;
1466         m_siginfo_t si;
1467
1468         if(ptrace(PTRACE_GETREGS, tcp->pid, (char *)&regs, 0) < 0) {
1469                 perror("sigreturn: PTRACE_GETREGS ");
1470                 return 0;
1471         }
1472         if(entering(tcp)) {
1473                 tcp->u_arg[0] = 0;
1474                 sp = regs.regs[29];
1475                 if (umove(tcp, sp, &si) < 0)
1476                 tcp->u_arg[0] = 1;
1477                 tcp->u_arg[1] = si.si_mask;
1478         } else {
1479                 sigset_t sigm;
1480                 long_to_sigset(tcp->u_arg[1], &sigm);
1481                 tcp->u_rval = tcp->u_error = 0;
1482                 if(tcp->u_arg[0] == 0)
1483                         return 0;
1484                 tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
1485                 return RVAL_NONE | RVAL_STR;
1486         }
1487         return 0;
1488 #else
1489 #warning No sys_sigreturn() for this architecture
1490 #warning         (no problem, just a reminder :-)
1491         return 0;
1492 #endif /* MIPS */
1493 #endif /* LINUX_MIPSN32 || LINUX_MIPSN64 */
1494 #endif /* SPARC || SPARC64 */
1495 #endif /* ALPHA */
1496 #endif /* !M68K */
1497 #endif /* !POWERPC */
1498 #endif /* !IA64 */
1499 #endif /* !I386 */
1500 #endif /* S390 */
1501 }
1502
1503 int
1504 sys_siggetmask(tcp)
1505 struct tcb *tcp;
1506 {
1507         if (exiting(tcp)) {
1508                 sigset_t sigm;
1509                 long_to_sigset(tcp->u_rval, &sigm);
1510                 tcp->auxstr = sprintsigmask("mask ", &sigm, 0);
1511         }
1512         return RVAL_HEX | RVAL_STR;
1513 }
1514
1515 int
1516 sys_sigsuspend(tcp)
1517 struct tcb *tcp;
1518 {
1519         if (entering(tcp)) {
1520                 sigset_t sigm;
1521                 long_to_sigset(tcp->u_arg[2], &sigm);
1522 #if 0
1523                 /* first two are not really arguments, but print them anyway */
1524                 /* nevermind, they are an anachronism now, too bad... */
1525                 tprintf("%d, %#x, ", tcp->u_arg[0], tcp->u_arg[1]);
1526 #endif
1527                 printsigmask(&sigm, 0);
1528         }
1529         return 0;
1530 }
1531
1532 #endif /* LINUX */
1533
1534 #if defined(SVR4) || defined(FREEBSD)
1535
1536 int
1537 sys_sigsuspend(tcp)
1538 struct tcb *tcp;
1539 {
1540         sigset_t sigset;
1541
1542         if (entering(tcp)) {
1543                 if (umove(tcp, tcp->u_arg[0], &sigset) < 0)
1544                         tprintf("[?]");
1545                 else
1546                         printsigmask(&sigset, 0);
1547         }
1548         return 0;
1549 }
1550 #ifndef FREEBSD
1551 static const struct xlat ucontext_flags[] = {
1552         { UC_SIGMASK,   "UC_SIGMASK"    },
1553         { UC_STACK,     "UC_STACK"      },
1554         { UC_CPU,       "UC_CPU"        },
1555 #ifdef UC_FPU
1556         { UC_FPU,       "UC_FPU"        },
1557 #endif
1558 #ifdef UC_INTR
1559         { UC_INTR,      "UC_INTR"       },
1560 #endif
1561         { 0,            NULL            },
1562 };
1563 #endif /* !FREEBSD */
1564 #endif /* SVR4 || FREEBSD */
1565
1566 #if defined SVR4 || defined LINUX || defined FREEBSD
1567 #if defined LINUX && !defined SS_ONSTACK
1568 #define SS_ONSTACK      1
1569 #define SS_DISABLE      2
1570 #if __GLIBC_MINOR__ == 0
1571 typedef struct
1572 {
1573         __ptr_t ss_sp;
1574         int ss_flags;
1575         size_t ss_size;
1576 } stack_t;
1577 #endif
1578 #endif
1579 #ifdef FREEBSD
1580 #define stack_t struct sigaltstack
1581 #endif
1582
1583 static const struct xlat sigaltstack_flags[] = {
1584         { SS_ONSTACK,   "SS_ONSTACK"    },
1585         { SS_DISABLE,   "SS_DISABLE"    },
1586         { 0,            NULL            },
1587 };
1588 #endif
1589
1590 #ifdef SVR4
1591 static void
1592 printcontext(tcp, ucp)
1593 struct tcb *tcp;
1594 ucontext_t *ucp;
1595 {
1596         tprintf("{");
1597         if (!abbrev(tcp)) {
1598                 tprintf("uc_flags=");
1599                 printflags(ucontext_flags, ucp->uc_flags, "UC_???");
1600                 tprintf(", uc_link=%#lx, ", (unsigned long) ucp->uc_link);
1601         }
1602         tprintf("uc_sigmask=");
1603         printsigmask(&ucp->uc_sigmask, 0);
1604         if (!abbrev(tcp)) {
1605                 tprintf(", uc_stack={ss_sp=%#lx, ss_size=%d, ss_flags=",
1606                         (unsigned long) ucp->uc_stack.ss_sp,
1607                         ucp->uc_stack.ss_size);
1608                 printflags(sigaltstack_flags, ucp->uc_stack.ss_flags, "SS_???");
1609                 tprintf("}");
1610         }
1611         tprintf(", ...}");
1612 }
1613
1614 int
1615 sys_getcontext(tcp)
1616 struct tcb *tcp;
1617 {
1618         ucontext_t uc;
1619
1620         if (exiting(tcp)) {
1621                 if (tcp->u_error)
1622                         tprintf("%#lx", tcp->u_arg[0]);
1623                 else if (!tcp->u_arg[0])
1624                         tprintf("NULL");
1625                 else if (umove(tcp, tcp->u_arg[0], &uc) < 0)
1626                         tprintf("{...}");
1627                 else
1628                         printcontext(tcp, &uc);
1629         }
1630         return 0;
1631 }
1632
1633 int
1634 sys_setcontext(tcp)
1635 struct tcb *tcp;
1636 {
1637         ucontext_t uc;
1638
1639         if (entering(tcp)) {
1640                 if (!tcp->u_arg[0])
1641                         tprintf("NULL");
1642                 else if (umove(tcp, tcp->u_arg[0], &uc) < 0)
1643                         tprintf("{...}");
1644                 else
1645                         printcontext(tcp, &uc);
1646         }
1647         else {
1648                 tcp->u_rval = tcp->u_error = 0;
1649                 if (tcp->u_arg[0] == 0)
1650                         return 0;
1651                 return RVAL_NONE;
1652         }
1653         return 0;
1654 }
1655
1656 #endif /* SVR4 */
1657
1658 #if defined(LINUX) || defined(FREEBSD)
1659
1660 static int
1661 print_stack_t(tcp, addr)
1662 struct tcb *tcp;
1663 unsigned long addr;
1664 {
1665         stack_t ss;
1666         if (umove(tcp, addr, &ss) < 0)
1667                 return -1;
1668         tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
1669         printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
1670         tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
1671         return 0;
1672 }
1673
1674 int
1675 sys_sigaltstack(tcp)
1676         struct tcb *tcp;
1677 {
1678         if (entering(tcp)) {
1679                 if (tcp->u_arg[0] == 0)
1680                         tprintf("NULL");
1681                 else if (print_stack_t(tcp, tcp->u_arg[0]) < 0)
1682                         return -1;
1683         }
1684         else {
1685                 tprintf(", ");
1686                 if (tcp->u_arg[1] == 0)
1687                         tprintf("NULL");
1688                 else if (print_stack_t(tcp, tcp->u_arg[1]) < 0)
1689                         return -1;
1690         }
1691         return 0;
1692 }
1693 #endif
1694
1695 #ifdef HAVE_SIGACTION
1696
1697 int
1698 sys_sigprocmask(tcp)
1699 struct tcb *tcp;
1700 {
1701 #ifdef ALPHA
1702         if (entering(tcp)) {
1703                 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1704                 tprintf(", ");
1705                 printsigmask(tcp->u_arg[1], 0);
1706         }
1707         else if (!syserror(tcp)) {
1708                 tcp->auxstr = sprintsigmask("old mask ", tcp->u_rval, 0);
1709                 return RVAL_HEX | RVAL_STR;
1710         }
1711 #else /* !ALPHA */
1712         if (entering(tcp)) {
1713 #ifdef SVR4
1714                 if (tcp->u_arg[0] == 0)
1715                         tprintf("0");
1716                 else
1717 #endif /* SVR4 */
1718                 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1719                 tprintf(", ");
1720                 print_sigset(tcp, tcp->u_arg[1], 0);
1721                 tprintf(", ");
1722         }
1723         else {
1724                 if (!tcp->u_arg[2])
1725                         tprintf("NULL");
1726                 else if (syserror(tcp))
1727                         tprintf("%#lx", tcp->u_arg[2]);
1728                 else
1729                         print_sigset(tcp, tcp->u_arg[2], 0);
1730         }
1731 #endif /* !ALPHA */
1732         return 0;
1733 }
1734
1735 #endif /* HAVE_SIGACTION */
1736
1737 int
1738 sys_kill(tcp)
1739 struct tcb *tcp;
1740 {
1741         if (entering(tcp)) {
1742                 /*
1743                  * Sign-extend a 32-bit value when that's what it is.
1744                  */
1745                 long pid = tcp->u_arg[0];
1746                 if (personality_wordsize[current_personality] < sizeof pid)
1747                         pid = (long) (int) pid;
1748                 tprintf("%ld, %s", pid, signame(tcp->u_arg[1]));
1749         }
1750         return 0;
1751 }
1752
1753 #if defined(FREEBSD) || defined(SUNOS4)
1754 int
1755 sys_killpg(tcp)
1756 struct tcb *tcp;
1757 {
1758         return sys_kill(tcp);
1759 }
1760 #endif /* FREEBSD || SUNOS4 */
1761
1762 #ifdef LINUX
1763 int
1764 sys_tgkill(tcp)
1765         struct tcb *tcp;
1766 {
1767         if (entering(tcp)) {
1768                 tprintf("%ld, %ld, %s",
1769                         tcp->u_arg[0], tcp->u_arg[1], signame(tcp->u_arg[2]));
1770         }
1771         return 0;
1772 }
1773 #endif
1774
1775 int
1776 sys_sigpending(tcp)
1777 struct tcb *tcp;
1778 {
1779         sigset_t sigset;
1780
1781         if (exiting(tcp)) {
1782                 if (syserror(tcp))
1783                         tprintf("%#lx", tcp->u_arg[0]);
1784                 else if (copy_sigset(tcp, tcp->u_arg[0], &sigset) < 0)
1785                         tprintf("[?]");
1786                 else
1787                         printsigmask(&sigset, 0);
1788         }
1789         return 0;
1790 }
1791
1792 #ifdef SVR4
1793 int sys_sigwait(tcp)
1794 struct tcb *tcp;
1795 {
1796         sigset_t sigset;
1797
1798         if (entering(tcp)) {
1799                 if (copy_sigset(tcp, tcp->u_arg[0], &sigset) < 0)
1800                         tprintf("[?]");
1801                 else
1802                         printsigmask(&sigset, 0);
1803         }
1804         else {
1805                 if (!syserror(tcp)) {
1806                         tcp->auxstr = signalent[tcp->u_rval];
1807                         return RVAL_DECIMAL | RVAL_STR;
1808                 }
1809         }
1810         return 0;
1811 }
1812 #endif /* SVR4 */
1813
1814 #ifdef LINUX
1815
1816         int
1817 sys_rt_sigprocmask(tcp)
1818         struct tcb *tcp;
1819 {
1820         sigset_t sigset;
1821
1822         /* Note: arg[3] is the length of the sigset. */
1823         if (entering(tcp)) {
1824                 printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
1825                 tprintf(", ");
1826                 if (!tcp->u_arg[1])
1827                         tprintf("NULL, ");
1828                 else if (copy_sigset_len(tcp, tcp->u_arg[1], &sigset, tcp->u_arg[3]) < 0)
1829                         tprintf("%#lx, ", tcp->u_arg[1]);
1830                 else {
1831                         printsigmask(&sigset, 1);
1832                         tprintf(", ");
1833                 }
1834         }
1835         else {
1836                 if (!tcp->u_arg[2])
1837
1838                         tprintf("NULL");
1839                 else if (syserror(tcp))
1840                         tprintf("%#lx", tcp->u_arg[2]);
1841                 else if (copy_sigset_len(tcp, tcp->u_arg[2], &sigset, tcp->u_arg[3]) < 0)
1842                         tprintf("[?]");
1843                 else
1844                         printsigmask(&sigset, 1);
1845                 tprintf(", %lu", tcp->u_arg[3]);
1846         }
1847         return 0;
1848 }
1849
1850
1851 /* Structure describing the action to be taken when a signal arrives.  */
1852 struct new_sigaction
1853 {
1854         union
1855         {
1856                 __sighandler_t __sa_handler;
1857                 void (*__sa_sigaction) (int, siginfo_t *, void *);
1858         }
1859         __sigaction_handler;
1860         unsigned long sa_flags;
1861         void (*sa_restorer) (void);
1862         unsigned long int sa_mask[2];
1863 };
1864
1865
1866 int
1867 sys_rt_sigaction(tcp)
1868         struct tcb *tcp;
1869 {
1870         struct new_sigaction sa;
1871         sigset_t sigset;
1872         long addr;
1873
1874         if (entering(tcp)) {
1875                 printsignal(tcp->u_arg[0]);
1876                 tprintf(", ");
1877                 addr = tcp->u_arg[1];
1878         } else
1879                 addr = tcp->u_arg[2];
1880         if (addr == 0)
1881                 tprintf("NULL");
1882         else if (!verbose(tcp))
1883                 tprintf("%#lx", addr);
1884         else if (umove(tcp, addr, &sa) < 0)
1885                 tprintf("{...}");
1886         else {
1887                 if (sa.__sigaction_handler.__sa_handler == SIG_ERR)
1888                         tprintf("{SIG_ERR, ");
1889                 else if (sa.__sigaction_handler.__sa_handler == SIG_DFL)
1890                         tprintf("{SIG_DFL, ");
1891                 else if (sa.__sigaction_handler.__sa_handler == SIG_DFL)
1892                         tprintf("{SIG_IGN, ");
1893                 else
1894                         tprintf("{%#lx, ",
1895                                 (long) sa.__sigaction_handler.__sa_handler);
1896                 sigemptyset(&sigset);
1897 #ifdef LINUXSPARC
1898                 if (tcp->u_arg[4] <= sizeof(sigset))
1899                         memcpy(&sigset, &sa.sa_mask, tcp->u_arg[4]);
1900 #else
1901                 if (tcp->u_arg[3] <= sizeof(sigset))
1902                         memcpy(&sigset, &sa.sa_mask, tcp->u_arg[3]);
1903 #endif
1904                 else
1905                         memcpy(&sigset, &sa.sa_mask, sizeof(sigset));
1906                 printsigmask(&sigset, 1);
1907                 tprintf(", ");
1908                 printflags(sigact_flags, sa.sa_flags, "SA_???");
1909 #ifdef SA_RESTORER
1910                 if (sa.sa_flags & SA_RESTORER)
1911                         tprintf(", %p", sa.sa_restorer);
1912 #endif
1913                 tprintf("}");
1914         }
1915         if (entering(tcp))
1916                 tprintf(", ");
1917         else
1918 #ifdef LINUXSPARC
1919                 tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
1920 #elif defined(ALPHA)
1921                 tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
1922 #else
1923                 tprintf(", %lu", addr = tcp->u_arg[3]);
1924 #endif
1925         return 0;
1926 }
1927
1928         int
1929 sys_rt_sigpending(tcp)
1930         struct tcb *tcp;
1931 {
1932         sigset_t sigset;
1933
1934         if (exiting(tcp)) {
1935                 if (syserror(tcp))
1936                         tprintf("%#lx", tcp->u_arg[0]);
1937                 else if (copy_sigset_len(tcp, tcp->u_arg[0],
1938                                          &sigset, tcp->u_arg[1]) < 0)
1939                         tprintf("[?]");
1940                 else
1941                         printsigmask(&sigset, 1);
1942         }
1943         return 0;
1944 }
1945         int
1946 sys_rt_sigsuspend(tcp)
1947         struct tcb *tcp;
1948 {
1949         if (entering(tcp)) {
1950                 sigset_t sigm;
1951                 if (copy_sigset_len(tcp, tcp->u_arg[0], &sigm, tcp->u_arg[1]) < 0)
1952                         tprintf("[?]");
1953                 else
1954                         printsigmask(&sigm, 1);
1955         }
1956         return 0;
1957 }
1958         int
1959 sys_rt_sigqueueinfo(tcp)
1960         struct tcb *tcp;
1961 {
1962         if (entering(tcp)) {
1963                 siginfo_t si;
1964                 tprintf("%lu, ", tcp->u_arg[0]);
1965                 printsignal(tcp->u_arg[1]);
1966                 tprintf(", ");
1967                 if (umove(tcp, tcp->u_arg[2], &si) < 0)
1968                         tprintf("%#lx", tcp->u_arg[2]);
1969                 else
1970                         printsiginfo(&si, verbose (tcp));
1971         }
1972         return 0;
1973 }
1974
1975 int sys_rt_sigtimedwait(tcp)
1976         struct tcb *tcp;
1977 {
1978         if (entering(tcp)) {
1979                 sigset_t sigset;
1980
1981                 if (copy_sigset_len(tcp, tcp->u_arg[0],
1982                                     &sigset, tcp->u_arg[3]) < 0)
1983                         tprintf("[?]");
1984                 else
1985                         printsigmask(&sigset, 1);
1986                 tprintf(", ");
1987         }
1988         else {
1989                 if (syserror(tcp))
1990                         tprintf("%#lx", tcp->u_arg[0]);
1991                 else {
1992                         siginfo_t si;
1993                         if (umove(tcp, tcp->u_arg[1], &si) < 0)
1994                                 tprintf("%#lx", tcp->u_arg[1]);
1995                         else
1996                                 printsiginfo(&si, verbose (tcp));
1997                         /* XXX For now */
1998                         tprintf(", %#lx", tcp->u_arg[2]);
1999                         tprintf(", %d", (int) tcp->u_arg[3]);
2000                 }
2001         }
2002         return 0;
2003 };
2004
2005 int
2006 sys_restart_syscall(tcp)
2007 struct tcb *tcp;
2008 {
2009         if (entering(tcp))
2010                 tprintf("<... resuming interrupted call ...>");
2011         return 0;
2012 }
2013
2014 extern const struct xlat open_mode_flags[];
2015
2016 static int
2017 do_signalfd(struct tcb *tcp, int flags_arg)
2018 {
2019         if (entering(tcp)) {
2020                 tprintf("%ld, ", tcp->u_arg[0]);
2021                 print_sigset(tcp, tcp->u_arg[1], 1);
2022                 tprintf("%lu", tcp->u_arg[2]);
2023                 if (flags_arg >= 0) {
2024                         tprintf(", ");
2025                         printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
2026                 }
2027         }
2028         return 0;
2029 }
2030
2031 int
2032 sys_signalfd(struct tcb *tcp)
2033 {
2034         return do_signalfd(tcp, -1);
2035 }
2036
2037 int
2038 sys_signalfd4(struct tcb *tcp)
2039 {
2040         return do_signalfd(tcp, 3);
2041 }
2042 #endif /* LINUX */