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