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