gdb/signals.c

   1 /* Target signal translation functions for GDB.
   2    Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   3    2000, 2001 Free Software Foundation, Inc.
   4    Contributed by Cygnus Support.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 #include "defs.h"
  24 #include "target.h"
  25 #include <signal.h>
  26
  27 /* This table must match in order and size the signals in enum target_signal
  28    in target.h.  */
  29 /* *INDENT-OFF* */
  30 static struct {
  31   char *name;
  32   char *string;
  33   } signals [] =
  34 {
  35   {"0", "Signal 0"},
  36   {"SIGHUP", "Hangup"},
  37   {"SIGINT", "Interrupt"},
  38   {"SIGQUIT", "Quit"},
  39   {"SIGILL", "Illegal instruction"},
  40   {"SIGTRAP", "Trace/breakpoint trap"},
  41   {"SIGABRT", "Aborted"},
  42   {"SIGEMT", "Emulation trap"},
  43   {"SIGFPE", "Arithmetic exception"},
  44   {"SIGKILL", "Killed"},
  45   {"SIGBUS", "Bus error"},
  46   {"SIGSEGV", "Segmentation fault"},
  47   {"SIGSYS", "Bad system call"},
  48   {"SIGPIPE", "Broken pipe"},
  49   {"SIGALRM", "Alarm clock"},
  50   {"SIGTERM", "Terminated"},
  51   {"SIGURG", "Urgent I/O condition"},
  52   {"SIGSTOP", "Stopped (signal)"},
  53   {"SIGTSTP", "Stopped (user)"},
  54   {"SIGCONT", "Continued"},
  55   {"SIGCHLD", "Child status changed"},
  56   {"SIGTTIN", "Stopped (tty input)"},
  57   {"SIGTTOU", "Stopped (tty output)"},
  58   {"SIGIO", "I/O possible"},
  59   {"SIGXCPU", "CPU time limit exceeded"},
  60   {"SIGXFSZ", "File size limit exceeded"},
  61   {"SIGVTALRM", "Virtual timer expired"},
  62   {"SIGPROF", "Profiling timer expired"},
  63   {"SIGWINCH", "Window size changed"},
  64   {"SIGLOST", "Resource lost"},
  65   {"SIGUSR1", "User defined signal 1"},
  66   {"SIGUSR2", "User defined signal 2"},
  67   {"SIGPWR", "Power fail/restart"},
  68   {"SIGPOLL", "Pollable event occurred"},
  69   {"SIGWIND", "SIGWIND"},
  70   {"SIGPHONE", "SIGPHONE"},
  71   {"SIGWAITING", "Process's LWPs are blocked"},
  72   {"SIGLWP", "Signal LWP"},
  73   {"SIGDANGER", "Swap space dangerously low"},
  74   {"SIGGRANT", "Monitor mode granted"},
  75   {"SIGRETRACT", "Need to relinquish monitor mode"},
  76   {"SIGMSG", "Monitor mode data available"},
  77   {"SIGSOUND", "Sound completed"},
  78   {"SIGSAK", "Secure attention"},
  79   {"SIGPRIO", "SIGPRIO"},
  80   {"SIG33", "Real-time event 33"},
  81   {"SIG34", "Real-time event 34"},
  82   {"SIG35", "Real-time event 35"},
  83   {"SIG36", "Real-time event 36"},
  84   {"SIG37", "Real-time event 37"},
  85   {"SIG38", "Real-time event 38"},
  86   {"SIG39", "Real-time event 39"},
  87   {"SIG40", "Real-time event 40"},
  88   {"SIG41", "Real-time event 41"},
  89   {"SIG42", "Real-time event 42"},
  90   {"SIG43", "Real-time event 43"},
  91   {"SIG44", "Real-time event 44"},
  92   {"SIG45", "Real-time event 45"},
  93   {"SIG46", "Real-time event 46"},
  94   {"SIG47", "Real-time event 47"},
  95   {"SIG48", "Real-time event 48"},
  96   {"SIG49", "Real-time event 49"},
  97   {"SIG50", "Real-time event 50"},
  98   {"SIG51", "Real-time event 51"},
  99   {"SIG52", "Real-time event 52"},
 100   {"SIG53", "Real-time event 53"},
 101   {"SIG54", "Real-time event 54"},
 102   {"SIG55", "Real-time event 55"},
 103   {"SIG56", "Real-time event 56"},
 104   {"SIG57", "Real-time event 57"},
 105   {"SIG58", "Real-time event 58"},
 106   {"SIG59", "Real-time event 59"},
 107   {"SIG60", "Real-time event 60"},
 108   {"SIG61", "Real-time event 61"},
 109   {"SIG62", "Real-time event 62"},
 110   {"SIG63", "Real-time event 63"},
 111   {"SIGCANCEL", "LWP internal signal"},
 112   {"SIG32", "Real-time event 32"},
 113   {"SIG64", "Real-time event 64"},
 114   {"SIG65", "Real-time event 65"},
 115   {"SIG66", "Real-time event 66"},
 116   {"SIG67", "Real-time event 67"},
 117   {"SIG68", "Real-time event 68"},
 118   {"SIG69", "Real-time event 69"},
 119   {"SIG70", "Real-time event 70"},
 120   {"SIG71", "Real-time event 71"},
 121   {"SIG72", "Real-time event 72"},
 122   {"SIG73", "Real-time event 73"},
 123   {"SIG74", "Real-time event 74"},
 124   {"SIG75", "Real-time event 75"},
 125   {"SIG76", "Real-time event 76"},
 126   {"SIG77", "Real-time event 77"},
 127   {"SIG78", "Real-time event 78"},
 128   {"SIG79", "Real-time event 79"},
 129   {"SIG80", "Real-time event 80"},
 130   {"SIG81", "Real-time event 81"},
 131   {"SIG82", "Real-time event 82"},
 132   {"SIG83", "Real-time event 83"},
 133   {"SIG84", "Real-time event 84"},
 134   {"SIG85", "Real-time event 85"},
 135   {"SIG86", "Real-time event 86"},
 136   {"SIG87", "Real-time event 87"},
 137   {"SIG88", "Real-time event 88"},
 138   {"SIG89", "Real-time event 89"},
 139   {"SIG90", "Real-time event 90"},
 140   {"SIG91", "Real-time event 91"},
 141   {"SIG92", "Real-time event 92"},
 142   {"SIG93", "Real-time event 93"},
 143   {"SIG94", "Real-time event 94"},
 144   {"SIG95", "Real-time event 95"},
 145   {"SIG96", "Real-time event 96"},
 146   {"SIG97", "Real-time event 97"},
 147   {"SIG98", "Real-time event 98"},
 148   {"SIG99", "Real-time event 99"},
 149   {"SIG100", "Real-time event 100"},
 150   {"SIG101", "Real-time event 101"},
 151   {"SIG102", "Real-time event 102"},
 152   {"SIG103", "Real-time event 103"},
 153   {"SIG104", "Real-time event 104"},
 154   {"SIG105", "Real-time event 105"},
 155   {"SIG106", "Real-time event 106"},
 156   {"SIG107", "Real-time event 107"},
 157   {"SIG108", "Real-time event 108"},
 158   {"SIG109", "Real-time event 109"},
 159   {"SIG110", "Real-time event 110"},
 160   {"SIG111", "Real-time event 111"},
 161   {"SIG112", "Real-time event 112"},
 162   {"SIG113", "Real-time event 113"},
 163   {"SIG114", "Real-time event 114"},
 164   {"SIG115", "Real-time event 115"},
 165   {"SIG116", "Real-time event 116"},
 166   {"SIG117", "Real-time event 117"},
 167   {"SIG118", "Real-time event 118"},
 168   {"SIG119", "Real-time event 119"},
 169   {"SIG120", "Real-time event 120"},
 170   {"SIG121", "Real-time event 121"},
 171   {"SIG122", "Real-time event 122"},
 172   {"SIG123", "Real-time event 123"},
 173   {"SIG124", "Real-time event 124"},
 174   {"SIG125", "Real-time event 125"},
 175   {"SIG126", "Real-time event 126"},
 176   {"SIG127", "Real-time event 127"},
 177
 178 #if defined(MACH) || defined(__MACH__)
 179   /* Mach exceptions */
 180   {"EXC_BAD_ACCESS", "Could not access memory"},
 181   {"EXC_BAD_INSTRUCTION", "Illegal instruction/operand"},
 182   {"EXC_ARITHMETIC", "Arithmetic exception"},
 183   {"EXC_EMULATION", "Emulation instruction"},
 184   {"EXC_SOFTWARE", "Software generated exception"},
 185   {"EXC_BREAKPOINT", "Breakpoint"},
 186 #endif
 187   {"SIGINFO", "Information request"},
 188
 189   {NULL, "Unknown signal"},
 190   {NULL, "Internal error: printing TARGET_SIGNAL_DEFAULT"},
 191
 192   /* Last entry, used to check whether the table is the right size.  */
 193   {NULL, "TARGET_SIGNAL_MAGIC"}
 194 };
 195 /* *INDENT-ON* */
 196
 197
 198
 199 /* Return the string for a signal.  */
 200 char *
 201 target_signal_to_string (enum target_signal sig)
 202 {
 203   if ((sig >= TARGET_SIGNAL_FIRST) && (sig <= TARGET_SIGNAL_LAST))
 204     return signals[sig].string;
 205   else
 206     return signals[TARGET_SIGNAL_UNKNOWN].string;
 207 }
 208
 209 /* Return the name for a signal.  */
 210 char *
 211 target_signal_to_name (enum target_signal sig)
 212 {
 213   if (sig == TARGET_SIGNAL_UNKNOWN)
 214     /* I think the code which prints this will always print it along with
 215        the string, so no need to be verbose.  */
 216     return "?";
 217   return signals[sig].name;
 218 }
 219
 220 /* Given a name, return its signal.  */
 221 enum target_signal
 222 target_signal_from_name (char *name)
 223 {
 224   enum target_signal sig;
 225
 226   /* It's possible we also should allow "SIGCLD" as well as "SIGCHLD"
 227      for TARGET_SIGNAL_SIGCHLD.  SIGIOT, on the other hand, is more
 228      questionable; seems like by now people should call it SIGABRT
 229      instead.  */
 230
 231   /* This ugly cast brought to you by the native VAX compiler.  */
 232   for (sig = TARGET_SIGNAL_HUP;
 233        signals[sig].name != NULL;
 234        sig = (enum target_signal) ((int) sig + 1))
 235     if (STREQ (name, signals[sig].name))
 236       return sig;
 237   return TARGET_SIGNAL_UNKNOWN;
 238 }
 239 \f
 240 /* The following functions are to help certain targets deal
 241    with the signal/waitstatus stuff.  They could just as well be in
 242    a file called native-utils.c or unixwaitstatus-utils.c or whatever.  */
 243
 244 /* Convert host signal to our signals.  */
 245 enum target_signal
 246 target_signal_from_host (int hostsig)
 247 {
 248   /* A switch statement would make sense but would require special kludges
 249      to deal with the cases where more than one signal has the same number.  */
 250
 251   if (hostsig == 0)
 252     return TARGET_SIGNAL_0;
 253
 254 #if defined (SIGHUP)
 255   if (hostsig == SIGHUP)
 256     return TARGET_SIGNAL_HUP;
 257 #endif
 258 #if defined (SIGINT)
 259   if (hostsig == SIGINT)
 260     return TARGET_SIGNAL_INT;
 261 #endif
 262 #if defined (SIGQUIT)
 263   if (hostsig == SIGQUIT)
 264     return TARGET_SIGNAL_QUIT;
 265 #endif
 266 #if defined (SIGILL)
 267   if (hostsig == SIGILL)
 268     return TARGET_SIGNAL_ILL;
 269 #endif
 270 #if defined (SIGTRAP)
 271   if (hostsig == SIGTRAP)
 272     return TARGET_SIGNAL_TRAP;
 273 #endif
 274 #if defined (SIGABRT)
 275   if (hostsig == SIGABRT)
 276     return TARGET_SIGNAL_ABRT;
 277 #endif
 278 #if defined (SIGEMT)
 279   if (hostsig == SIGEMT)
 280     return TARGET_SIGNAL_EMT;
 281 #endif
 282 #if defined (SIGFPE)
 283   if (hostsig == SIGFPE)
 284     return TARGET_SIGNAL_FPE;
 285 #endif
 286 #if defined (SIGKILL)
 287   if (hostsig == SIGKILL)
 288     return TARGET_SIGNAL_KILL;
 289 #endif
 290 #if defined (SIGBUS)
 291   if (hostsig == SIGBUS)
 292     return TARGET_SIGNAL_BUS;
 293 #endif
 294 #if defined (SIGSEGV)
 295   if (hostsig == SIGSEGV)
 296     return TARGET_SIGNAL_SEGV;
 297 #endif
 298 #if defined (SIGSYS)
 299   if (hostsig == SIGSYS)
 300     return TARGET_SIGNAL_SYS;
 301 #endif
 302 #if defined (SIGPIPE)
 303   if (hostsig == SIGPIPE)
 304     return TARGET_SIGNAL_PIPE;
 305 #endif
 306 #if defined (SIGALRM)
 307   if (hostsig == SIGALRM)
 308     return TARGET_SIGNAL_ALRM;
 309 #endif
 310 #if defined (SIGTERM)
 311   if (hostsig == SIGTERM)
 312     return TARGET_SIGNAL_TERM;
 313 #endif
 314 #if defined (SIGUSR1)
 315   if (hostsig == SIGUSR1)
 316     return TARGET_SIGNAL_USR1;
 317 #endif
 318 #if defined (SIGUSR2)
 319   if (hostsig == SIGUSR2)
 320     return TARGET_SIGNAL_USR2;
 321 #endif
 322 #if defined (SIGCLD)
 323   if (hostsig == SIGCLD)
 324     return TARGET_SIGNAL_CHLD;
 325 #endif
 326 #if defined (SIGCHLD)
 327   if (hostsig == SIGCHLD)
 328     return TARGET_SIGNAL_CHLD;
 329 #endif
 330 #if defined (SIGPWR)
 331   if (hostsig == SIGPWR)
 332     return TARGET_SIGNAL_PWR;
 333 #endif
 334 #if defined (SIGWINCH)
 335   if (hostsig == SIGWINCH)
 336     return TARGET_SIGNAL_WINCH;
 337 #endif
 338 #if defined (SIGURG)
 339   if (hostsig == SIGURG)
 340     return TARGET_SIGNAL_URG;
 341 #endif
 342 #if defined (SIGIO)
 343   if (hostsig == SIGIO)
 344     return TARGET_SIGNAL_IO;
 345 #endif
 346 #if defined (SIGPOLL)
 347   if (hostsig == SIGPOLL)
 348     return TARGET_SIGNAL_POLL;
 349 #endif
 350 #if defined (SIGSTOP)
 351   if (hostsig == SIGSTOP)
 352     return TARGET_SIGNAL_STOP;
 353 #endif
 354 #if defined (SIGTSTP)
 355   if (hostsig == SIGTSTP)
 356     return TARGET_SIGNAL_TSTP;
 357 #endif
 358 #if defined (SIGCONT)
 359   if (hostsig == SIGCONT)
 360     return TARGET_SIGNAL_CONT;
 361 #endif
 362 #if defined (SIGTTIN)
 363   if (hostsig == SIGTTIN)
 364     return TARGET_SIGNAL_TTIN;
 365 #endif
 366 #if defined (SIGTTOU)
 367   if (hostsig == SIGTTOU)
 368     return TARGET_SIGNAL_TTOU;
 369 #endif
 370 #if defined (SIGVTALRM)
 371   if (hostsig == SIGVTALRM)
 372     return TARGET_SIGNAL_VTALRM;
 373 #endif
 374 #if defined (SIGPROF)
 375   if (hostsig == SIGPROF)
 376     return TARGET_SIGNAL_PROF;
 377 #endif
 378 #if defined (SIGXCPU)
 379   if (hostsig == SIGXCPU)
 380     return TARGET_SIGNAL_XCPU;
 381 #endif
 382 #if defined (SIGXFSZ)
 383   if (hostsig == SIGXFSZ)
 384     return TARGET_SIGNAL_XFSZ;
 385 #endif
 386 #if defined (SIGWIND)
 387   if (hostsig == SIGWIND)
 388     return TARGET_SIGNAL_WIND;
 389 #endif
 390 #if defined (SIGPHONE)
 391   if (hostsig == SIGPHONE)
 392     return TARGET_SIGNAL_PHONE;
 393 #endif
 394 #if defined (SIGLOST)
 395   if (hostsig == SIGLOST)
 396     return TARGET_SIGNAL_LOST;
 397 #endif
 398 #if defined (SIGWAITING)
 399   if (hostsig == SIGWAITING)
 400     return TARGET_SIGNAL_WAITING;
 401 #endif
 402 #if defined (SIGCANCEL)
 403   if (hostsig == SIGCANCEL)
 404     return TARGET_SIGNAL_CANCEL;
 405 #endif
 406 #if defined (SIGLWP)
 407   if (hostsig == SIGLWP)
 408     return TARGET_SIGNAL_LWP;
 409 #endif
 410 #if defined (SIGDANGER)
 411   if (hostsig == SIGDANGER)
 412     return TARGET_SIGNAL_DANGER;
 413 #endif
 414 #if defined (SIGGRANT)
 415   if (hostsig == SIGGRANT)
 416     return TARGET_SIGNAL_GRANT;
 417 #endif
 418 #if defined (SIGRETRACT)
 419   if (hostsig == SIGRETRACT)
 420     return TARGET_SIGNAL_RETRACT;
 421 #endif
 422 #if defined (SIGMSG)
 423   if (hostsig == SIGMSG)
 424     return TARGET_SIGNAL_MSG;
 425 #endif
 426 #if defined (SIGSOUND)
 427   if (hostsig == SIGSOUND)
 428     return TARGET_SIGNAL_SOUND;
 429 #endif
 430 #if defined (SIGSAK)
 431   if (hostsig == SIGSAK)
 432     return TARGET_SIGNAL_SAK;
 433 #endif
 434 #if defined (SIGPRIO)
 435   if (hostsig == SIGPRIO)
 436     return TARGET_SIGNAL_PRIO;
 437 #endif
 438
 439   /* Mach exceptions.  Assumes that the values for EXC_ are positive! */
 440 #if defined (EXC_BAD_ACCESS) && defined (_NSIG)
 441   if (hostsig == _NSIG + EXC_BAD_ACCESS)
 442     return TARGET_EXC_BAD_ACCESS;
 443 #endif
 444 #if defined (EXC_BAD_INSTRUCTION) && defined (_NSIG)
 445   if (hostsig == _NSIG + EXC_BAD_INSTRUCTION)
 446     return TARGET_EXC_BAD_INSTRUCTION;
 447 #endif
 448 #if defined (EXC_ARITHMETIC) && defined (_NSIG)
 449   if (hostsig == _NSIG + EXC_ARITHMETIC)
 450     return TARGET_EXC_ARITHMETIC;
 451 #endif
 452 #if defined (EXC_EMULATION) && defined (_NSIG)
 453   if (hostsig == _NSIG + EXC_EMULATION)
 454     return TARGET_EXC_EMULATION;
 455 #endif
 456 #if defined (EXC_SOFTWARE) && defined (_NSIG)
 457   if (hostsig == _NSIG + EXC_SOFTWARE)
 458     return TARGET_EXC_SOFTWARE;
 459 #endif
 460 #if defined (EXC_BREAKPOINT) && defined (_NSIG)
 461   if (hostsig == _NSIG + EXC_BREAKPOINT)
 462     return TARGET_EXC_BREAKPOINT;
 463 #endif
 464
 465 #if defined (SIGINFO)
 466   if (hostsig == SIGINFO)
 467     return TARGET_SIGNAL_INFO;
 468 #endif
 469
 470 #if defined (REALTIME_LO)
 471   if (hostsig >= REALTIME_LO && hostsig < REALTIME_HI)
 472     {
 473       /* This block of TARGET_SIGNAL_REALTIME value is in order.  */
 474       if (33 <= hostsig && hostsig <= 63)
 475         return (enum target_signal)
 476           (hostsig - 33 + (int) TARGET_SIGNAL_REALTIME_33);
 477       else if (hostsig == 32)
 478         return TARGET_SIGNAL_REALTIME_32;
 479       else if (64 <= hostsig && hostsig <= 127)
 480         return (enum target_signal)
 481           (hostsig - 64 + (int) TARGET_SIGNAL_REALTIME_64);
 482       else
 483         error ("GDB bug: target.c (target_signal_from_host): unrecognized real-time signal");
 484     }
 485 #endif
 486
 487 #if defined (SIGRTMIN)
 488   if (hostsig >= SIGRTMIN && hostsig <= SIGRTMAX)
 489     {
 490       /* This block of TARGET_SIGNAL_REALTIME value is in order.  */
 491       if (33 <= hostsig && hostsig <= 63)
 492         return (enum target_signal)
 493           (hostsig - 33 + (int) TARGET_SIGNAL_REALTIME_33);
 494       else if (hostsig == 64)
 495         return TARGET_SIGNAL_REALTIME_64;
 496       else
 497         error ("GDB bug: target.c (target_signal_from_host): unrecognized real-time signal");
 498     }
 499 #endif
 500   return TARGET_SIGNAL_UNKNOWN;
 501 }
 502
 503 /* Convert a OURSIG (an enum target_signal) to the form used by the
 504    target operating system (refered to as the ``host'') or zero if the
 505    equivalent host signal is not available.  Set/clear OURSIG_OK
 506    accordingly. */
 507
 508 static int
 509 do_target_signal_to_host (enum target_signal oursig,
 510                           int *oursig_ok)
 511 {
 512   *oursig_ok = 1;
 513   switch (oursig)
 514     {
 515     case TARGET_SIGNAL_0:
 516       return 0;
 517
 518 #if defined (SIGHUP)
 519     case TARGET_SIGNAL_HUP:
 520       return SIGHUP;
 521 #endif
 522 #if defined (SIGINT)
 523     case TARGET_SIGNAL_INT:
 524       return SIGINT;
 525 #endif
 526 #if defined (SIGQUIT)
 527     case TARGET_SIGNAL_QUIT:
 528       return SIGQUIT;
 529 #endif
 530 #if defined (SIGILL)
 531     case TARGET_SIGNAL_ILL:
 532       return SIGILL;
 533 #endif
 534 #if defined (SIGTRAP)
 535     case TARGET_SIGNAL_TRAP:
 536       return SIGTRAP;
 537 #endif
 538 #if defined (SIGABRT)
 539     case TARGET_SIGNAL_ABRT:
 540       return SIGABRT;
 541 #endif
 542 #if defined (SIGEMT)
 543     case TARGET_SIGNAL_EMT:
 544       return SIGEMT;
 545 #endif
 546 #if defined (SIGFPE)
 547     case TARGET_SIGNAL_FPE:
 548       return SIGFPE;
 549 #endif
 550 #if defined (SIGKILL)
 551     case TARGET_SIGNAL_KILL:
 552       return SIGKILL;
 553 #endif
 554 #if defined (SIGBUS)
 555     case TARGET_SIGNAL_BUS:
 556       return SIGBUS;
 557 #endif
 558 #if defined (SIGSEGV)
 559     case TARGET_SIGNAL_SEGV:
 560       return SIGSEGV;
 561 #endif
 562 #if defined (SIGSYS)
 563     case TARGET_SIGNAL_SYS:
 564       return SIGSYS;
 565 #endif
 566 #if defined (SIGPIPE)
 567     case TARGET_SIGNAL_PIPE:
 568       return SIGPIPE;
 569 #endif
 570 #if defined (SIGALRM)
 571     case TARGET_SIGNAL_ALRM:
 572       return SIGALRM;
 573 #endif
 574 #if defined (SIGTERM)
 575     case TARGET_SIGNAL_TERM:
 576       return SIGTERM;
 577 #endif
 578 #if defined (SIGUSR1)
 579     case TARGET_SIGNAL_USR1:
 580       return SIGUSR1;
 581 #endif
 582 #if defined (SIGUSR2)
 583     case TARGET_SIGNAL_USR2:
 584       return SIGUSR2;
 585 #endif
 586 #if defined (SIGCHLD) || defined (SIGCLD)
 587     case TARGET_SIGNAL_CHLD:
 588 #if defined (SIGCHLD)
 589       return SIGCHLD;
 590 #else
 591       return SIGCLD;
 592 #endif
 593 #endif /* SIGCLD or SIGCHLD */
 594 #if defined (SIGPWR)
 595     case TARGET_SIGNAL_PWR:
 596       return SIGPWR;
 597 #endif
 598 #if defined (SIGWINCH)
 599     case TARGET_SIGNAL_WINCH:
 600       return SIGWINCH;
 601 #endif
 602 #if defined (SIGURG)
 603     case TARGET_SIGNAL_URG:
 604       return SIGURG;
 605 #endif
 606 #if defined (SIGIO)
 607     case TARGET_SIGNAL_IO:
 608       return SIGIO;
 609 #endif
 610 #if defined (SIGPOLL)
 611     case TARGET_SIGNAL_POLL:
 612       return SIGPOLL;
 613 #endif
 614 #if defined (SIGSTOP)
 615     case TARGET_SIGNAL_STOP:
 616       return SIGSTOP;
 617 #endif
 618 #if defined (SIGTSTP)
 619     case TARGET_SIGNAL_TSTP:
 620       return SIGTSTP;
 621 #endif
 622 #if defined (SIGCONT)
 623     case TARGET_SIGNAL_CONT:
 624       return SIGCONT;
 625 #endif
 626 #if defined (SIGTTIN)
 627     case TARGET_SIGNAL_TTIN:
 628       return SIGTTIN;
 629 #endif
 630 #if defined (SIGTTOU)
 631     case TARGET_SIGNAL_TTOU:
 632       return SIGTTOU;
 633 #endif
 634 #if defined (SIGVTALRM)
 635     case TARGET_SIGNAL_VTALRM:
 636       return SIGVTALRM;
 637 #endif
 638 #if defined (SIGPROF)
 639     case TARGET_SIGNAL_PROF:
 640       return SIGPROF;
 641 #endif
 642 #if defined (SIGXCPU)
 643     case TARGET_SIGNAL_XCPU:
 644       return SIGXCPU;
 645 #endif
 646 #if defined (SIGXFSZ)
 647     case TARGET_SIGNAL_XFSZ:
 648       return SIGXFSZ;
 649 #endif
 650 #if defined (SIGWIND)
 651     case TARGET_SIGNAL_WIND:
 652       return SIGWIND;
 653 #endif
 654 #if defined (SIGPHONE)
 655     case TARGET_SIGNAL_PHONE:
 656       return SIGPHONE;
 657 #endif
 658 #if defined (SIGLOST)
 659     case TARGET_SIGNAL_LOST:
 660       return SIGLOST;
 661 #endif
 662 #if defined (SIGWAITING)
 663     case TARGET_SIGNAL_WAITING:
 664       return SIGWAITING;
 665 #endif
 666 #if defined (SIGCANCEL)
 667     case TARGET_SIGNAL_CANCEL:
 668       return SIGCANCEL;
 669 #endif
 670 #if defined (SIGLWP)
 671     case TARGET_SIGNAL_LWP:
 672       return SIGLWP;
 673 #endif
 674 #if defined (SIGDANGER)
 675     case TARGET_SIGNAL_DANGER:
 676       return SIGDANGER;
 677 #endif
 678 #if defined (SIGGRANT)
 679     case TARGET_SIGNAL_GRANT:
 680       return SIGGRANT;
 681 #endif
 682 #if defined (SIGRETRACT)
 683     case TARGET_SIGNAL_RETRACT:
 684       return SIGRETRACT;
 685 #endif
 686 #if defined (SIGMSG)
 687     case TARGET_SIGNAL_MSG:
 688       return SIGMSG;
 689 #endif
 690 #if defined (SIGSOUND)
 691     case TARGET_SIGNAL_SOUND:
 692       return SIGSOUND;
 693 #endif
 694 #if defined (SIGSAK)
 695     case TARGET_SIGNAL_SAK:
 696       return SIGSAK;
 697 #endif
 698 #if defined (SIGPRIO)
 699     case TARGET_SIGNAL_PRIO:
 700       return SIGPRIO;
 701 #endif
 702
 703       /* Mach exceptions.  Assumes that the values for EXC_ are positive! */
 704 #if defined (EXC_BAD_ACCESS) && defined (_NSIG)
 705     case TARGET_EXC_BAD_ACCESS:
 706       return _NSIG + EXC_BAD_ACCESS;
 707 #endif
 708 #if defined (EXC_BAD_INSTRUCTION) && defined (_NSIG)
 709     case TARGET_EXC_BAD_INSTRUCTION:
 710       return _NSIG + EXC_BAD_INSTRUCTION;
 711 #endif
 712 #if defined (EXC_ARITHMETIC) && defined (_NSIG)
 713     case TARGET_EXC_ARITHMETIC:
 714       return _NSIG + EXC_ARITHMETIC;
 715 #endif
 716 #if defined (EXC_EMULATION) && defined (_NSIG)
 717     case TARGET_EXC_EMULATION:
 718       return _NSIG + EXC_EMULATION;
 719 #endif
 720 #if defined (EXC_SOFTWARE) && defined (_NSIG)
 721     case TARGET_EXC_SOFTWARE:
 722       return _NSIG + EXC_SOFTWARE;
 723 #endif
 724 #if defined (EXC_BREAKPOINT) && defined (_NSIG)
 725     case TARGET_EXC_BREAKPOINT:
 726       return _NSIG + EXC_BREAKPOINT;
 727 #endif
 728
 729 #if defined (SIGINFO)
 730     case TARGET_SIGNAL_INFO:
 731       return SIGINFO;
 732 #endif
 733
 734     default:
 735 #if defined (REALTIME_LO)
 736       if (oursig >= TARGET_SIGNAL_REALTIME_33
 737           && oursig <= TARGET_SIGNAL_REALTIME_63)
 738         {
 739           /* This block of signals is continuous, and
 740              TARGET_SIGNAL_REALTIME_33 is 33 by definition.  */
 741           int retsig =
 742             (int) oursig - (int) TARGET_SIGNAL_REALTIME_33 + 33;
 743           if (retsig >= REALTIME_LO && retsig < REALTIME_HI)
 744             return retsig;
 745         }
 746 #if (REALTIME_LO < 33)
 747       else if (oursig == TARGET_SIGNAL_REALTIME_32)
 748         {
 749           /* TARGET_SIGNAL_REALTIME_32 isn't contiguous with
 750              TARGET_SIGNAL_REALTIME_33.  It is 32 by definition.  */
 751           return 32;
 752         }
 753 #endif
 754 #if (REALTIME_HI > 64)
 755       if (oursig >= TARGET_SIGNAL_REALTIME_64
 756           && oursig <= TARGET_SIGNAL_REALTIME_127)
 757         {
 758           /* This block of signals is continuous, and
 759              TARGET_SIGNAL_REALTIME_64 is 64 by definition.  */
 760           int retsig =
 761             (int) oursig - (int) TARGET_SIGNAL_REALTIME_64 + 64;
 762           if (retsig >= REALTIME_LO && retsig < REALTIME_HI)
 763             return retsig;
 764         }
 765
 766 #endif
 767 #endif
 768
 769 #if defined (SIGRTMIN)
 770       if (oursig >= TARGET_SIGNAL_REALTIME_33
 771           && oursig <= TARGET_SIGNAL_REALTIME_63)
 772         {
 773           /* This block of signals is continuous, and
 774              TARGET_SIGNAL_REALTIME_33 is 33 by definition.  */
 775           int retsig =
 776             (int) oursig - (int) TARGET_SIGNAL_REALTIME_33 + 33;
 777           if (retsig >= SIGRTMIN && retsig <= SIGRTMAX)
 778             return retsig;
 779         }
 780       else if (oursig == TARGET_SIGNAL_REALTIME_64)
 781         return 64;
 782 #endif
 783       *oursig_ok = 0;
 784       return 0;
 785     }
 786 }
 787
 788 int
 789 target_signal_to_host_p (enum target_signal oursig)
 790 {
 791   int oursig_ok;
 792   do_target_signal_to_host (oursig, &oursig_ok);
 793   return oursig_ok;
 794 }
 795
 796 int
 797 target_signal_to_host (enum target_signal oursig)
 798 {
 799   int oursig_ok;
 800   int targ_signo = do_target_signal_to_host (oursig, &oursig_ok);
 801   if (!oursig_ok)
 802     {
 803       /* The user might be trying to do "signal SIGSAK" where this system
 804          doesn't have SIGSAK.  */
 805       warning ("Signal %s does not exist on this system.\n",
 806                target_signal_to_name (oursig));
 807       return 0;
 808     }
 809   else
 810     return targ_signo;
 811 }
 812
 813 /* In some circumstances we allow a command to specify a numeric
 814    signal.  The idea is to keep these circumstances limited so that
 815    users (and scripts) develop portable habits.  For comparison,
 816    POSIX.2 `kill' requires that 1,2,3,6,9,14, and 15 work (and using a
 817    numeric signal at all is obsolescent.  We are slightly more
 818    lenient and allow 1-15 which should match host signal numbers on
 819    most systems.  Use of symbolic signal names is strongly encouraged.  */
 820
 821 enum target_signal
 822 target_signal_from_command (int num)
 823 {
 824   if (num >= 1 && num <= 15)
 825     return (enum target_signal) num;
 826   error ("Only signals 1-15 are valid as numeric signals.\n\
 827 Use \"info signals\" for a list of symbolic signals.");
 828 }
 829
 830 void
 831 _initialize_signals (void)
 832 {
 833   if (!STREQ (signals[TARGET_SIGNAL_LAST].string, "TARGET_SIGNAL_MAGIC"))
 834     internal_error (__FILE__, __LINE__, "failed internal consistency check");
 835 }