gdb/obsd-tdep.c

   1 /* Target-dependent code for OpenBSD.
   2
   3    Copyright (C) 2005-2021 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   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.
  11
  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.
  16
  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/>.  */
  19
  20 #include "defs.h"
  21 #include "auxv.h"
  22 #include "frame.h"
  23 #include "symtab.h"
  24 #include "objfiles.h"
  25
  26 #include "obsd-tdep.h"
  27
  28 CORE_ADDR
  29 obsd_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc)
  30 {
  31   struct bound_minimal_symbol msym;
  32
  33   msym = lookup_minimal_symbol("_dl_bind", NULL, NULL);
  34   if (msym.minsym && BMSYMBOL_VALUE_ADDRESS (msym) == pc)
  35     return frame_unwind_caller_pc (get_current_frame ());
  36   else
  37     return find_solib_trampoline_target (get_current_frame (), pc);
  38 }
  39
  40 /* OpenBSD signal numbers.  From <sys/signal.h>. */
  41
  42 enum
  43   {
  44     OBSD_SIGHUP = 1,
  45     OBSD_SIGINT = 2,
  46     OBSD_SIGQUIT = 3,
  47     OBSD_SIGILL = 4,
  48     OBSD_SIGTRAP = 5,
  49     OBSD_SIGABRT = 6,
  50     OBSD_SIGEMT = 7,
  51     OBSD_SIGFPE = 8,
  52     OBSD_SIGKILL = 9,
  53     OBSD_SIGBUS = 10,
  54     OBSD_SIGSEGV = 11,
  55     OBSD_SIGSYS = 12,
  56     OBSD_SIGPIPE = 13,
  57     OBSD_SIGALRM = 14,
  58     OBSD_SIGTERM = 15,
  59     OBSD_SIGURG = 16,
  60     OBSD_SIGSTOP = 17,
  61     OBSD_SIGTSTP = 18,
  62     OBSD_SIGCONT = 19,
  63     OBSD_SIGCHLD = 20,
  64     OBSD_SIGTTIN = 21,
  65     OBSD_SIGTTOU = 22,
  66     OBSD_SIGIO = 23,
  67     OBSD_SIGXCPU = 24,
  68     OBSD_SIGXFSZ = 25,
  69     OBSD_SIGVTALRM = 26,
  70     OBSD_SIGPROF = 27,
  71     OBSD_SIGWINCH = 28,
  72     OBSD_SIGINFO = 29,
  73     OBSD_SIGUSR1 = 30,
  74     OBSD_SIGUSR2 = 31,
  75     OBSD_SIGTHR = 32,
  76   };
  77
  78 /* Implement the "gdb_signal_from_target" gdbarch method.  */
  79
  80 static enum gdb_signal
  81 obsd_gdb_signal_from_target (struct gdbarch *gdbarch, int signal)
  82 {
  83   switch (signal)
  84     {
  85     case 0:
  86       return GDB_SIGNAL_0;
  87
  88     case OBSD_SIGHUP:
  89       return GDB_SIGNAL_HUP;
  90
  91     case OBSD_SIGINT:
  92       return GDB_SIGNAL_INT;
  93
  94     case OBSD_SIGQUIT:
  95       return GDB_SIGNAL_QUIT;
  96
  97     case OBSD_SIGILL:
  98       return GDB_SIGNAL_ILL;
  99
 100     case OBSD_SIGTRAP:
 101       return GDB_SIGNAL_TRAP;
 102
 103     case OBSD_SIGABRT:
 104       return GDB_SIGNAL_ABRT;
 105
 106     case OBSD_SIGEMT:
 107       return GDB_SIGNAL_EMT;
 108
 109     case OBSD_SIGFPE:
 110       return GDB_SIGNAL_FPE;
 111
 112     case OBSD_SIGKILL:
 113       return GDB_SIGNAL_KILL;
 114
 115     case OBSD_SIGBUS:
 116       return GDB_SIGNAL_BUS;
 117
 118     case OBSD_SIGSEGV:
 119       return GDB_SIGNAL_SEGV;
 120
 121     case OBSD_SIGSYS:
 122       return GDB_SIGNAL_SYS;
 123
 124     case OBSD_SIGPIPE:
 125       return GDB_SIGNAL_PIPE;
 126
 127     case OBSD_SIGALRM:
 128       return GDB_SIGNAL_ALRM;
 129
 130     case OBSD_SIGTERM:
 131       return GDB_SIGNAL_TERM;
 132
 133     case OBSD_SIGURG:
 134       return GDB_SIGNAL_URG;
 135
 136     case OBSD_SIGSTOP:
 137       return GDB_SIGNAL_STOP;
 138
 139     case OBSD_SIGTSTP:
 140       return GDB_SIGNAL_TSTP;
 141
 142     case OBSD_SIGCONT:
 143       return GDB_SIGNAL_CONT;
 144
 145     case OBSD_SIGCHLD:
 146       return GDB_SIGNAL_CHLD;
 147
 148     case OBSD_SIGTTIN:
 149       return GDB_SIGNAL_TTIN;
 150
 151     case OBSD_SIGTTOU:
 152       return GDB_SIGNAL_TTOU;
 153
 154     case OBSD_SIGIO:
 155       return GDB_SIGNAL_IO;
 156
 157     case OBSD_SIGXCPU:
 158       return GDB_SIGNAL_XCPU;
 159
 160     case OBSD_SIGXFSZ:
 161       return GDB_SIGNAL_XFSZ;
 162
 163     case OBSD_SIGVTALRM:
 164       return GDB_SIGNAL_VTALRM;
 165
 166     case OBSD_SIGPROF:
 167       return GDB_SIGNAL_PROF;
 168
 169     case OBSD_SIGWINCH:
 170       return GDB_SIGNAL_WINCH;
 171
 172     case OBSD_SIGINFO:
 173       return GDB_SIGNAL_INFO;
 174
 175     case OBSD_SIGUSR1:
 176       return GDB_SIGNAL_USR1;
 177
 178     case OBSD_SIGUSR2:
 179       return GDB_SIGNAL_USR2;
 180     }
 181
 182   return GDB_SIGNAL_UNKNOWN;
 183 }
 184
 185 /* Implement the "gdb_signal_to_target" gdbarch method.  */
 186
 187 static int
 188 obsd_gdb_signal_to_target (struct gdbarch *gdbarch,
 189                            enum gdb_signal signal)
 190 {
 191   switch (signal)
 192     {
 193     case GDB_SIGNAL_0:
 194       return 0;
 195
 196     case GDB_SIGNAL_HUP:
 197       return OBSD_SIGHUP;
 198
 199     case GDB_SIGNAL_INT:
 200       return OBSD_SIGINT;
 201
 202     case GDB_SIGNAL_QUIT:
 203       return OBSD_SIGQUIT;
 204
 205     case GDB_SIGNAL_ILL:
 206       return OBSD_SIGILL;
 207
 208     case GDB_SIGNAL_TRAP:
 209       return OBSD_SIGTRAP;
 210
 211     case GDB_SIGNAL_ABRT:
 212       return OBSD_SIGABRT;
 213
 214     case GDB_SIGNAL_EMT:
 215       return OBSD_SIGEMT;
 216
 217     case GDB_SIGNAL_FPE:
 218       return OBSD_SIGFPE;
 219
 220     case GDB_SIGNAL_KILL:
 221       return OBSD_SIGKILL;
 222
 223     case GDB_SIGNAL_BUS:
 224       return OBSD_SIGBUS;
 225
 226     case GDB_SIGNAL_SEGV:
 227       return OBSD_SIGSEGV;
 228
 229     case GDB_SIGNAL_SYS:
 230       return OBSD_SIGSYS;
 231
 232     case GDB_SIGNAL_PIPE:
 233       return OBSD_SIGPIPE;
 234
 235     case GDB_SIGNAL_ALRM:
 236       return OBSD_SIGALRM;
 237
 238     case GDB_SIGNAL_TERM:
 239       return OBSD_SIGTERM;
 240
 241     case GDB_SIGNAL_URG:
 242       return OBSD_SIGURG;
 243
 244     case GDB_SIGNAL_STOP:
 245       return OBSD_SIGSTOP;
 246
 247     case GDB_SIGNAL_TSTP:
 248       return OBSD_SIGTSTP;
 249
 250     case GDB_SIGNAL_CONT:
 251       return OBSD_SIGCONT;
 252
 253     case GDB_SIGNAL_CHLD:
 254       return OBSD_SIGCHLD;
 255
 256     case GDB_SIGNAL_TTIN:
 257       return OBSD_SIGTTIN;
 258
 259     case GDB_SIGNAL_TTOU:
 260       return OBSD_SIGTTOU;
 261
 262     case GDB_SIGNAL_IO:
 263       return OBSD_SIGIO;
 264
 265     case GDB_SIGNAL_XCPU:
 266       return OBSD_SIGXCPU;
 267
 268     case GDB_SIGNAL_XFSZ:
 269       return OBSD_SIGXFSZ;
 270
 271     case GDB_SIGNAL_VTALRM:
 272       return OBSD_SIGVTALRM;
 273
 274     case GDB_SIGNAL_PROF:
 275       return OBSD_SIGPROF;
 276
 277     case GDB_SIGNAL_WINCH:
 278       return OBSD_SIGWINCH;
 279
 280     case GDB_SIGNAL_USR1:
 281       return OBSD_SIGUSR1;
 282
 283     case GDB_SIGNAL_USR2:
 284       return OBSD_SIGUSR2;
 285
 286     case GDB_SIGNAL_INFO:
 287       return OBSD_SIGINFO;
 288     }
 289
 290   return -1;
 291 }
 292
 293 void
 294 obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 295 {
 296   set_gdbarch_gdb_signal_from_target (gdbarch,
 297                                       obsd_gdb_signal_from_target);
 298   set_gdbarch_gdb_signal_to_target (gdbarch,
 299                                     obsd_gdb_signal_to_target);
 300
 301   set_gdbarch_auxv_parse (gdbarch, svr4_auxv_parse);
 302 }