gdb/common/signals.c - gdb

Global variables defined

Functions defined

Macros defined

Source code

  1. /* Target signal translation functions for GDB.
  2.    Copyright (C) 1990-2015 Free Software Foundation, Inc.
  3.    Contributed by Cygnus Support.

  5.    This file is part of GDB.

  7.    This program is free software; you can redistribute it and/or modify
  8.    it under the terms of the GNU General Public License as published by
  9.    the Free Software Foundation; either version 3 of the License, or
  10.    (at your option) any later version.

  12.    This program is distributed in the hope that it will be useful,
  13.    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15.    GNU General Public License for more details.

  17.    You should have received a copy of the GNU General Public License
  18.    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

  20. #include "common-defs.h"

  22. #ifdef HAVE_SIGNAL_H
  23. #include <signal.h>
  24. #endif

  26. #include "gdb_signals.h"

  28. struct gdbarch;

  30. /* Always use __SIGRTMIN if it's available.  SIGRTMIN is the lowest
  31.    _available_ realtime signal, not the lowest supported; glibc takes
  32.    several for its own use.  */

  34. #ifndef REALTIME_LO
  35. # if defined(__SIGRTMIN)
  36. ‌#  define REALTIME_LO __SIGRTMIN
  37. ‌#  define REALTIME_HI (__SIGRTMAX + 1)
  38. # elif defined(SIGRTMIN)
  39. ‌#  define REALTIME_LO SIGRTMIN
  40. ‌#  define REALTIME_HI (SIGRTMAX + 1)
  41. # endif
  42. #endif

  44. /* This table must match in order and size the signals in enum
  45.    gdb_signal.  */

  47. static const struct {
  48.   const char *symbol;
  49.   const char *name;
  50.   const char *string;
  51. ‌  } signals [] =
  52. {
  53. ‌#define SET(symbol, constant, name, string) { #symbol, name, string },
  54. #include "gdb/signals.def"
  55. ‌#undef SET
  56. };

  58. const char *
  59. ‌gdb_signal_to_symbol_string (enum gdb_signal sig)
  60. {
  61.   gdb_assert ((int) sig >= GDB_SIGNAL_FIRST && (int) sig <= GDB_SIGNAL_LAST);

  63.   return signals[sig].symbol;
  64. }

  66. /* Return the string for a signal.  */
  67. const char *
  68. ‌gdb_signal_to_string (enum gdb_signal sig)
  69. {
  70.   if ((int) sig >= GDB_SIGNAL_FIRST && (int) sig <= GDB_SIGNAL_LAST)
  71.     return signals[sig].string;
  72.   else
  73.     return signals[GDB_SIGNAL_UNKNOWN].string;
  74. }

  76. /* Return the name for a signal.  */
  77. const char *
  78. ‌gdb_signal_to_name (enum gdb_signal sig)
  79. {
  80.   if ((int) sig >= GDB_SIGNAL_FIRST && (int) sig <= GDB_SIGNAL_LAST
  81.       && signals[sig].name != NULL)
  82.     return signals[sig].name;
  83.   else
  84.     /* I think the code which prints this will always print it along
  85.        with the string, so no need to be verbose (very old comment).  */
  86.     return "?";
  87. }

  89. /* Given a name, return its signal.  */
  90. enum gdb_signal
  91. ‌gdb_signal_from_name (const char *name)
  92. {
  93.   enum gdb_signal sig;

  95.   /* It's possible we also should allow "SIGCLD" as well as "SIGCHLD"
  96.      for GDB_SIGNAL_SIGCHLD.  SIGIOT, on the other hand, is more
  97.      questionable; seems like by now people should call it SIGABRT
  98.      instead.  */

  100.   /* This ugly cast brought to you by the native VAX compiler.  */
  101.   for (sig = GDB_SIGNAL_HUP;
  102.        sig < GDB_SIGNAL_LAST;
  103.        sig = (enum gdb_signal) ((int) sig + 1))
  104.     if (signals[sig].name != NULL
  105.         && strcmp (name, signals[sig].name) == 0)
  106.       return sig;
  107.   return GDB_SIGNAL_UNKNOWN;
  108. }

  110. /* The following functions are to help certain targets deal
  111.    with the signal/waitstatus stuff.  They could just as well be in
  112.    a file called native-utils.c or unixwaitstatus-utils.c or whatever.  */

  114. /* Convert host signal to our signals.  */
  115. enum gdb_signal
  116. ‌gdb_signal_from_host (int hostsig)
  117. {
  118.   /* A switch statement would make sense but would require special
  119.      kludges to deal with the cases where more than one signal has the
  120.      same number.  Signals are ordered ANSI-standard signals first,
  121.      other signals second, with signals in each block ordered by their
  122.      numerical values on a typical POSIX platform.  */

  124.   if (hostsig == 0)
  125.     return GDB_SIGNAL_0;

  127.   /* SIGINT, SIGILL, SIGABRT, SIGFPE, SIGSEGV and SIGTERM
  128.      are ANSI-standard signals and are always available.  */
  129.   if (hostsig == SIGINT)
  130.     return GDB_SIGNAL_INT;
  131.   if (hostsig == SIGILL)
  132.     return GDB_SIGNAL_ILL;
  133.   if (hostsig == SIGABRT)
  134.     return GDB_SIGNAL_ABRT;
  135.   if (hostsig == SIGFPE)
  136.     return GDB_SIGNAL_FPE;
  137.   if (hostsig == SIGSEGV)
  138.     return GDB_SIGNAL_SEGV;
  139.   if (hostsig == SIGTERM)
  140.     return GDB_SIGNAL_TERM;

  142.   /* All other signals need preprocessor conditionals.  */
  143. #if defined (SIGHUP)
  144.   if (hostsig == SIGHUP)
  145.     return GDB_SIGNAL_HUP;
  146. #endif
  147. #if defined (SIGQUIT)
  148.   if (hostsig == SIGQUIT)
  149.     return GDB_SIGNAL_QUIT;
  150. #endif
  151. #if defined (SIGTRAP)
  152.   if (hostsig == SIGTRAP)
  153.     return GDB_SIGNAL_TRAP;
  154. #endif
  155. #if defined (SIGEMT)
  156.   if (hostsig == SIGEMT)
  157.     return GDB_SIGNAL_EMT;
  158. #endif
  159. #if defined (SIGKILL)
  160.   if (hostsig == SIGKILL)
  161.     return GDB_SIGNAL_KILL;
  162. #endif
  163. #if defined (SIGBUS)
  164.   if (hostsig == SIGBUS)
  165.     return GDB_SIGNAL_BUS;
  166. #endif
  167. #if defined (SIGSYS)
  168.   if (hostsig == SIGSYS)
  169.     return GDB_SIGNAL_SYS;
  170. #endif
  171. #if defined (SIGPIPE)
  172.   if (hostsig == SIGPIPE)
  173.     return GDB_SIGNAL_PIPE;
  174. #endif
  175. #if defined (SIGALRM)
  176.   if (hostsig == SIGALRM)
  177.     return GDB_SIGNAL_ALRM;
  178. #endif
  179. #if defined (SIGUSR1)
  180.   if (hostsig == SIGUSR1)
  181.     return GDB_SIGNAL_USR1;
  182. #endif
  183. #if defined (SIGUSR2)
  184.   if (hostsig == SIGUSR2)
  185.     return GDB_SIGNAL_USR2;
  186. #endif
  187. #if defined (SIGCLD)
  188.   if (hostsig == SIGCLD)
  189.     return GDB_SIGNAL_CHLD;
  190. #endif
  191. #if defined (SIGCHLD)
  192.   if (hostsig == SIGCHLD)
  193.     return GDB_SIGNAL_CHLD;
  194. #endif
  195. #if defined (SIGPWR)
  196.   if (hostsig == SIGPWR)
  197.     return GDB_SIGNAL_PWR;
  198. #endif
  199. #if defined (SIGWINCH)
  200.   if (hostsig == SIGWINCH)
  201.     return GDB_SIGNAL_WINCH;
  202. #endif
  203. #if defined (SIGURG)
  204.   if (hostsig == SIGURG)
  205.     return GDB_SIGNAL_URG;
  206. #endif
  207. #if defined (SIGIO)
  208.   if (hostsig == SIGIO)
  209.     return GDB_SIGNAL_IO;
  210. #endif
  211. #if defined (SIGPOLL)
  212.   if (hostsig == SIGPOLL)
  213.     return GDB_SIGNAL_POLL;
  214. #endif
  215. #if defined (SIGSTOP)
  216.   if (hostsig == SIGSTOP)
  217.     return GDB_SIGNAL_STOP;
  218. #endif
  219. #if defined (SIGTSTP)
  220.   if (hostsig == SIGTSTP)
  221.     return GDB_SIGNAL_TSTP;
  222. #endif
  223. #if defined (SIGCONT)
  224.   if (hostsig == SIGCONT)
  225.     return GDB_SIGNAL_CONT;
  226. #endif
  227. #if defined (SIGTTIN)
  228.   if (hostsig == SIGTTIN)
  229.     return GDB_SIGNAL_TTIN;
  230. #endif
  231. #if defined (SIGTTOU)
  232.   if (hostsig == SIGTTOU)
  233.     return GDB_SIGNAL_TTOU;
  234. #endif
  235. #if defined (SIGVTALRM)
  236.   if (hostsig == SIGVTALRM)
  237.     return GDB_SIGNAL_VTALRM;
  238. #endif
  239. #if defined (SIGPROF)
  240.   if (hostsig == SIGPROF)
  241.     return GDB_SIGNAL_PROF;
  242. #endif
  243. #if defined (SIGXCPU)
  244.   if (hostsig == SIGXCPU)
  245.     return GDB_SIGNAL_XCPU;
  246. #endif
  247. #if defined (SIGXFSZ)
  248.   if (hostsig == SIGXFSZ)
  249.     return GDB_SIGNAL_XFSZ;
  250. #endif
  251. #if defined (SIGWIND)
  252.   if (hostsig == SIGWIND)
  253.     return GDB_SIGNAL_WIND;
  254. #endif
  255. #if defined (SIGPHONE)
  256.   if (hostsig == SIGPHONE)
  257.     return GDB_SIGNAL_PHONE;
  258. #endif
  259. #if defined (SIGLOST)
  260.   if (hostsig == SIGLOST)
  261.     return GDB_SIGNAL_LOST;
  262. #endif
  263. #if defined (SIGWAITING)
  264.   if (hostsig == SIGWAITING)
  265.     return GDB_SIGNAL_WAITING;
  266. #endif
  267. #if defined (SIGCANCEL)
  268.   if (hostsig == SIGCANCEL)
  269.     return GDB_SIGNAL_CANCEL;
  270. #endif
  271. #if defined (SIGLWP)
  272.   if (hostsig == SIGLWP)
  273.     return GDB_SIGNAL_LWP;
  274. #endif
  275. #if defined (SIGDANGER)
  276.   if (hostsig == SIGDANGER)
  277.     return GDB_SIGNAL_DANGER;
  278. #endif
  279. #if defined (SIGGRANT)
  280.   if (hostsig == SIGGRANT)
  281.     return GDB_SIGNAL_GRANT;
  282. #endif
  283. #if defined (SIGRETRACT)
  284.   if (hostsig == SIGRETRACT)
  285.     return GDB_SIGNAL_RETRACT;
  286. #endif
  287. #if defined (SIGMSG)
  288.   if (hostsig == SIGMSG)
  289.     return GDB_SIGNAL_MSG;
  290. #endif
  291. #if defined (SIGSOUND)
  292.   if (hostsig == SIGSOUND)
  293.     return GDB_SIGNAL_SOUND;
  294. #endif
  295. #if defined (SIGSAK)
  296.   if (hostsig == SIGSAK)
  297.     return GDB_SIGNAL_SAK;
  298. #endif
  299. #if defined (SIGPRIO)
  300.   if (hostsig == SIGPRIO)
  301.     return GDB_SIGNAL_PRIO;
  302. #endif

  304.   /* Mach exceptions.  Assumes that the values for EXC_ are positive! */
  305. #if defined (EXC_BAD_ACCESS) && defined (_NSIG)
  306.   if (hostsig == _NSIG + EXC_BAD_ACCESS)
  307.     return GDB_EXC_BAD_ACCESS;
  308. #endif
  309. #if defined (EXC_BAD_INSTRUCTION) && defined (_NSIG)
  310.   if (hostsig == _NSIG + EXC_BAD_INSTRUCTION)
  311.     return GDB_EXC_BAD_INSTRUCTION;
  312. #endif
  313. #if defined (EXC_ARITHMETIC) && defined (_NSIG)
  314.   if (hostsig == _NSIG + EXC_ARITHMETIC)
  315.     return GDB_EXC_ARITHMETIC;
  316. #endif
  317. #if defined (EXC_EMULATION) && defined (_NSIG)
  318.   if (hostsig == _NSIG + EXC_EMULATION)
  319.     return GDB_EXC_EMULATION;
  320. #endif
  321. #if defined (EXC_SOFTWARE) && defined (_NSIG)
  322.   if (hostsig == _NSIG + EXC_SOFTWARE)
  323.     return GDB_EXC_SOFTWARE;
  324. #endif
  325. #if defined (EXC_BREAKPOINT) && defined (_NSIG)
  326.   if (hostsig == _NSIG + EXC_BREAKPOINT)
  327.     return GDB_EXC_BREAKPOINT;
  328. #endif

  330. #if defined (SIGINFO)
  331.   if (hostsig == SIGINFO)
  332.     return GDB_SIGNAL_INFO;
  333. #endif

  335. #if defined (REALTIME_LO)
  336.   if (hostsig >= REALTIME_LO && hostsig < REALTIME_HI)
  337.     {
  338.       /* This block of GDB_SIGNAL_REALTIME value is in order.  */
  339.       if (33 <= hostsig && hostsig <= 63)
  340.         return (enum gdb_signal)
  341.           (hostsig - 33 + (int) GDB_SIGNAL_REALTIME_33);
  342.       else if (hostsig == 32)
  343.         return GDB_SIGNAL_REALTIME_32;
  344.       else if (64 <= hostsig && hostsig <= 127)
  345.         return (enum gdb_signal)
  346.           (hostsig - 64 + (int) GDB_SIGNAL_REALTIME_64);
  347.       else
  348.         error (_("GDB bug: target.c (gdb_signal_from_host): "
  349.                "unrecognized real-time signal"));
  350.     }
  351. #endif

  353.   return GDB_SIGNAL_UNKNOWN;
  354. }

  356. /* Convert a OURSIG (an enum gdb_signal) to the form used by the
  357.    target operating system (refered to as the ``host'') or zero if the
  358.    equivalent host signal is not available.  Set/clear OURSIG_OK
  359.    accordingly. */

  361. static int
  362. ‌do_gdb_signal_to_host (enum gdb_signal oursig,
  363.                           int *oursig_ok)
  364. {
  365.   int retsig;
  366.   /* Silence the 'not used' warning, for targets that
  367.      do not support signals.  */
  368.   (void) retsig;

  370.   /* Signals are ordered ANSI-standard signals first, other signals
  371.      second, with signals in each block ordered by their numerical
  372.      values on a typical POSIX platform.  */

  374.   *oursig_ok = 1;
  375.   switch (oursig)
  376.     {
  377.     case GDB_SIGNAL_0:
  378.       return 0;

  380.       /* SIGINT, SIGILL, SIGABRT, SIGFPE, SIGSEGV and SIGTERM
  381.          are ANSI-standard signals and are always available.  */
  382.     case GDB_SIGNAL_INT:
  383.       return SIGINT;
  384.     case GDB_SIGNAL_ILL:
  385.       return SIGILL;
  386.     case GDB_SIGNAL_ABRT:
  387.       return SIGABRT;
  388.     case GDB_SIGNAL_FPE:
  389.       return SIGFPE;
  390.     case GDB_SIGNAL_SEGV:
  391.       return SIGSEGV;
  392.     case GDB_SIGNAL_TERM:
  393.       return SIGTERM;

  395.       /* All other signals need preprocessor conditionals.  */
  396. #if defined (SIGHUP)
  397.     case GDB_SIGNAL_HUP:
  398.       return SIGHUP;
  399. #endif
  400. #if defined (SIGQUIT)
  401.     case GDB_SIGNAL_QUIT:
  402.       return SIGQUIT;
  403. #endif
  404. #if defined (SIGTRAP)
  405.     case GDB_SIGNAL_TRAP:
  406.       return SIGTRAP;
  407. #endif
  408. #if defined (SIGEMT)
  409.     case GDB_SIGNAL_EMT:
  410.       return SIGEMT;
  411. #endif
  412. #if defined (SIGKILL)
  413.     case GDB_SIGNAL_KILL:
  414.       return SIGKILL;
  415. #endif
  416. #if defined (SIGBUS)
  417.     case GDB_SIGNAL_BUS:
  418.       return SIGBUS;
  419. #endif
  420. #if defined (SIGSYS)
  421.     case GDB_SIGNAL_SYS:
  422.       return SIGSYS;
  423. #endif
  424. #if defined (SIGPIPE)
  425.     case GDB_SIGNAL_PIPE:
  426.       return SIGPIPE;
  427. #endif
  428. #if defined (SIGALRM)
  429.     case GDB_SIGNAL_ALRM:
  430.       return SIGALRM;
  431. #endif
  432. #if defined (SIGUSR1)
  433.     case GDB_SIGNAL_USR1:
  434.       return SIGUSR1;
  435. #endif
  436. #if defined (SIGUSR2)
  437.     case GDB_SIGNAL_USR2:
  438.       return SIGUSR2;
  439. #endif
  440. #if defined (SIGCHLD) || defined (SIGCLD)
  441.     case GDB_SIGNAL_CHLD:
  442. #if defined (SIGCHLD)
  443.       return SIGCHLD;
  444. #else
  445.       return SIGCLD;
  446. #endif
  447. #endif /* SIGCLD or SIGCHLD */
  448. #if defined (SIGPWR)
  449.     case GDB_SIGNAL_PWR:
  450.       return SIGPWR;
  451. #endif
  452. #if defined (SIGWINCH)
  453.     case GDB_SIGNAL_WINCH:
  454.       return SIGWINCH;
  455. #endif
  456. #if defined (SIGURG)
  457.     case GDB_SIGNAL_URG:
  458.       return SIGURG;
  459. #endif
  460. #if defined (SIGIO)
  461.     case GDB_SIGNAL_IO:
  462.       return SIGIO;
  463. #endif
  464. #if defined (SIGPOLL)
  465.     case GDB_SIGNAL_POLL:
  466.       return SIGPOLL;
  467. #endif
  468. #if defined (SIGSTOP)
  469.     case GDB_SIGNAL_STOP:
  470.       return SIGSTOP;
  471. #endif
  472. #if defined (SIGTSTP)
  473.     case GDB_SIGNAL_TSTP:
  474.       return SIGTSTP;
  475. #endif
  476. #if defined (SIGCONT)
  477.     case GDB_SIGNAL_CONT:
  478.       return SIGCONT;
  479. #endif
  480. #if defined (SIGTTIN)
  481.     case GDB_SIGNAL_TTIN:
  482.       return SIGTTIN;
  483. #endif
  484. #if defined (SIGTTOU)
  485.     case GDB_SIGNAL_TTOU:
  486.       return SIGTTOU;
  487. #endif
  488. #if defined (SIGVTALRM)
  489.     case GDB_SIGNAL_VTALRM:
  490.       return SIGVTALRM;
  491. #endif
  492. #if defined (SIGPROF)
  493.     case GDB_SIGNAL_PROF:
  494.       return SIGPROF;
  495. #endif
  496. #if defined (SIGXCPU)
  497.     case GDB_SIGNAL_XCPU:
  498.       return SIGXCPU;
  499. #endif
  500. #if defined (SIGXFSZ)
  501.     case GDB_SIGNAL_XFSZ:
  502.       return SIGXFSZ;
  503. #endif
  504. #if defined (SIGWIND)
  505.     case GDB_SIGNAL_WIND:
  506.       return SIGWIND;
  507. #endif
  508. #if defined (SIGPHONE)
  509.     case GDB_SIGNAL_PHONE:
  510.       return SIGPHONE;
  511. #endif
  512. #if defined (SIGLOST)
  513.     case GDB_SIGNAL_LOST:
  514.       return SIGLOST;
  515. #endif
  516. #if defined (SIGWAITING)
  517.     case GDB_SIGNAL_WAITING:
  518.       return SIGWAITING;
  519. #endif
  520. #if defined (SIGCANCEL)
  521.     case GDB_SIGNAL_CANCEL:
  522.       return SIGCANCEL;
  523. #endif
  524. #if defined (SIGLWP)
  525.     case GDB_SIGNAL_LWP:
  526.       return SIGLWP;
  527. #endif
  528. #if defined (SIGDANGER)
  529.     case GDB_SIGNAL_DANGER:
  530.       return SIGDANGER;
  531. #endif
  532. #if defined (SIGGRANT)
  533.     case GDB_SIGNAL_GRANT:
  534.       return SIGGRANT;
  535. #endif
  536. #if defined (SIGRETRACT)
  537.     case GDB_SIGNAL_RETRACT:
  538.       return SIGRETRACT;
  539. #endif
  540. #if defined (SIGMSG)
  541.     case GDB_SIGNAL_MSG:
  542.       return SIGMSG;
  543. #endif
  544. #if defined (SIGSOUND)
  545.     case GDB_SIGNAL_SOUND:
  546.       return SIGSOUND;
  547. #endif
  548. #if defined (SIGSAK)
  549.     case GDB_SIGNAL_SAK:
  550.       return SIGSAK;
  551. #endif
  552. #if defined (SIGPRIO)
  553.     case GDB_SIGNAL_PRIO:
  554.       return SIGPRIO;
  555. #endif

  557.       /* Mach exceptions.  Assumes that the values for EXC_ are positive! */
  558. #if defined (EXC_BAD_ACCESS) && defined (_NSIG)
  559.     case GDB_EXC_BAD_ACCESS:
  560.       return _NSIG + EXC_BAD_ACCESS;
  561. #endif
  562. #if defined (EXC_BAD_INSTRUCTION) && defined (_NSIG)
  563.     case GDB_EXC_BAD_INSTRUCTION:
  564.       return _NSIG + EXC_BAD_INSTRUCTION;
  565. #endif
  566. #if defined (EXC_ARITHMETIC) && defined (_NSIG)
  567.     case GDB_EXC_ARITHMETIC:
  568.       return _NSIG + EXC_ARITHMETIC;
  569. #endif
  570. #if defined (EXC_EMULATION) && defined (_NSIG)
  571.     case GDB_EXC_EMULATION:
  572.       return _NSIG + EXC_EMULATION;
  573. #endif
  574. #if defined (EXC_SOFTWARE) && defined (_NSIG)
  575.     case GDB_EXC_SOFTWARE:
  576.       return _NSIG + EXC_SOFTWARE;
  577. #endif
  578. #if defined (EXC_BREAKPOINT) && defined (_NSIG)
  579.     case GDB_EXC_BREAKPOINT:
  580.       return _NSIG + EXC_BREAKPOINT;
  581. #endif

  583. #if defined (SIGINFO)
  584.     case GDB_SIGNAL_INFO:
  585.       return SIGINFO;
  586. #endif

  588.     default:
  589. #if defined (REALTIME_LO)
  590.       retsig = 0;

  592.       if (oursig >= GDB_SIGNAL_REALTIME_33
  593.           && oursig <= GDB_SIGNAL_REALTIME_63)
  594.         {
  595.           /* This block of signals is continuous, and
  596.              GDB_SIGNAL_REALTIME_33 is 33 by definition.  */
  597.           retsig = (int) oursig - (int) GDB_SIGNAL_REALTIME_33 + 33;
  598.         }
  599.       else if (oursig == GDB_SIGNAL_REALTIME_32)
  600.         {
  601.           /* GDB_SIGNAL_REALTIME_32 isn't contiguous with
  602.              GDB_SIGNAL_REALTIME_33.  It is 32 by definition.  */
  603.           retsig = 32;
  604.         }
  605.       else if (oursig >= GDB_SIGNAL_REALTIME_64
  606.           && oursig <= GDB_SIGNAL_REALTIME_127)
  607.         {
  608.           /* This block of signals is continuous, and
  609.              GDB_SIGNAL_REALTIME_64 is 64 by definition.  */
  610.           retsig = (int) oursig - (int) GDB_SIGNAL_REALTIME_64 + 64;
  611.         }

  613.       if (retsig >= REALTIME_LO && retsig < REALTIME_HI)
  614.         return retsig;
  615. #endif

  617.       *oursig_ok = 0;
  618.       return 0;
  619.     }
  620. }

  622. int
  623. ‌gdb_signal_to_host_p (enum gdb_signal oursig)
  624. {
  625.   int oursig_ok;
  626.   do_gdb_signal_to_host (oursig, &oursig_ok);
  627.   return oursig_ok;
  628. }

  630. int
  631. ‌gdb_signal_to_host (enum gdb_signal oursig)
  632. {
  633.   int oursig_ok;
  634.   int targ_signo = do_gdb_signal_to_host (oursig, &oursig_ok);
  635.   if (!oursig_ok)
  636.     {
  637.       /* The user might be trying to do "signal SIGSAK" where this system
  638.          doesn't have SIGSAK.  */
  639.       warning (_("Signal %s does not exist on this system."),
  640.                gdb_signal_to_name (oursig));
  641.       return 0;
  642.     }
  643.   else
  644.     return targ_signo;
  645. }