gdb/netbsd-tdep.c

   1 /* Common target-dependent code for NetBSD systems.
   2
   3    Copyright (C) 2002-2024 Free Software Foundation, Inc.
   4
   5    Contributed by Wasabi Systems, Inc.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #include "defs.h"
  23 #include "auxv.h"
  24 #include "solib-svr4.h"
  25 #include "netbsd-tdep.h"
  26 #include "gdbarch.h"
  27 #include "objfiles.h"
  28 #include "xml-syscall.h"
  29
  30 /* Flags in the 'kve_protection' field in struct kinfo_vmentry.  These
  31    match the KVME_PROT_* constants in <sys/sysctl.h>.  */
  32
  33 #define KINFO_VME_PROT_READ     0x00000001
  34 #define KINFO_VME_PROT_WRITE    0x00000002
  35 #define KINFO_VME_PROT_EXEC     0x00000004
  36
  37 /* Flags in the 'kve_flags' field in struct kinfo_vmentry.  These
  38    match the KVME_FLAG_* constants in <sys/sysctl.h>.  */
  39
  40 #define KINFO_VME_FLAG_COW              0x00000001
  41 #define KINFO_VME_FLAG_NEEDS_COPY       0x00000002
  42 #define KINFO_VME_FLAG_NOCOREDUMP       0x00000004
  43 #define KINFO_VME_FLAG_PAGEABLE         0x00000008
  44 #define KINFO_VME_FLAG_GROWS_UP         0x00000010
  45 #define KINFO_VME_FLAG_GROWS_DOWN       0x00000020
  46
  47 int
  48 nbsd_pc_in_sigtramp (CORE_ADDR pc, const char *func_name)
  49 {
  50   /* Check for libc-provided signal trampoline.  All such trampolines
  51      have function names which begin with "__sigtramp".  */
  52
  53   return (func_name != NULL
  54           && startswith (func_name, "__sigtramp"));
  55 }
  56
  57 /* This enum is derived from NETBSD's <sys/signal.h>.  */
  58
  59 enum
  60   {
  61    NBSD_SIGHUP = 1,
  62    NBSD_SIGINT = 2,
  63    NBSD_SIGQUIT = 3,
  64    NBSD_SIGILL = 4,
  65    NBSD_SIGTRAP = 5,
  66    NBSD_SIGABRT = 6,
  67    NBSD_SIGEMT = 7,
  68    NBSD_SIGFPE = 8,
  69    NBSD_SIGKILL = 9,
  70    NBSD_SIGBUS = 10,
  71    NBSD_SIGSEGV = 11,
  72    NBSD_SIGSYS = 12,
  73    NBSD_SIGPIPE = 13,
  74    NBSD_SIGALRM = 14,
  75    NBSD_SIGTERM = 15,
  76    NBSD_SIGURG = 16,
  77    NBSD_SIGSTOP = 17,
  78    NBSD_SIGTSTP = 18,
  79    NBSD_SIGCONT = 19,
  80    NBSD_SIGCHLD = 20,
  81    NBSD_SIGTTIN = 21,
  82    NBSD_SIGTTOU = 22,
  83    NBSD_SIGIO = 23,
  84    NBSD_SIGXCPU = 24,
  85    NBSD_SIGXFSZ = 25,
  86    NBSD_SIGVTALRM = 26,
  87    NBSD_SIGPROF = 27,
  88    NBSD_SIGWINCH = 28,
  89    NBSD_SIGINFO = 29,
  90    NBSD_SIGUSR1 = 30,
  91    NBSD_SIGUSR2 = 31,
  92    NBSD_SIGPWR = 32,
  93    NBSD_SIGRTMIN = 33,
  94    NBSD_SIGRTMAX = 63,
  95   };
  96
  97 /* Implement the "gdb_signal_from_target" gdbarch method.  */
  98
  99 static enum gdb_signal
 100 nbsd_gdb_signal_from_target (struct gdbarch *gdbarch, int signal)
 101 {
 102   switch (signal)
 103     {
 104     case 0:
 105       return GDB_SIGNAL_0;
 106
 107     case NBSD_SIGHUP:
 108       return GDB_SIGNAL_HUP;
 109
 110     case NBSD_SIGINT:
 111       return GDB_SIGNAL_INT;
 112
 113     case NBSD_SIGQUIT:
 114       return GDB_SIGNAL_QUIT;
 115
 116     case NBSD_SIGILL:
 117       return GDB_SIGNAL_ILL;
 118
 119     case NBSD_SIGTRAP:
 120       return GDB_SIGNAL_TRAP;
 121
 122     case NBSD_SIGABRT:
 123       return GDB_SIGNAL_ABRT;
 124
 125     case NBSD_SIGEMT:
 126       return GDB_SIGNAL_EMT;
 127
 128     case NBSD_SIGFPE:
 129       return GDB_SIGNAL_FPE;
 130
 131     case NBSD_SIGKILL:
 132       return GDB_SIGNAL_KILL;
 133
 134     case NBSD_SIGBUS:
 135       return GDB_SIGNAL_BUS;
 136
 137     case NBSD_SIGSEGV:
 138       return GDB_SIGNAL_SEGV;
 139
 140     case NBSD_SIGSYS:
 141       return GDB_SIGNAL_SYS;
 142
 143     case NBSD_SIGPIPE:
 144       return GDB_SIGNAL_PIPE;
 145
 146     case NBSD_SIGALRM:
 147       return GDB_SIGNAL_ALRM;
 148
 149     case NBSD_SIGTERM:
 150       return GDB_SIGNAL_TERM;
 151
 152     case NBSD_SIGURG:
 153       return GDB_SIGNAL_URG;
 154
 155     case NBSD_SIGSTOP:
 156       return GDB_SIGNAL_STOP;
 157
 158     case NBSD_SIGTSTP:
 159       return GDB_SIGNAL_TSTP;
 160
 161     case NBSD_SIGCONT:
 162       return GDB_SIGNAL_CONT;
 163
 164     case NBSD_SIGCHLD:
 165       return GDB_SIGNAL_CHLD;
 166
 167     case NBSD_SIGTTIN:
 168       return GDB_SIGNAL_TTIN;
 169
 170     case NBSD_SIGTTOU:
 171       return GDB_SIGNAL_TTOU;
 172
 173     case NBSD_SIGIO:
 174       return GDB_SIGNAL_IO;
 175
 176     case NBSD_SIGXCPU:
 177       return GDB_SIGNAL_XCPU;
 178
 179     case NBSD_SIGXFSZ:
 180       return GDB_SIGNAL_XFSZ;
 181
 182     case NBSD_SIGVTALRM:
 183       return GDB_SIGNAL_VTALRM;
 184
 185     case NBSD_SIGPROF:
 186       return GDB_SIGNAL_PROF;
 187
 188     case NBSD_SIGWINCH:
 189       return GDB_SIGNAL_WINCH;
 190
 191     case NBSD_SIGINFO:
 192       return GDB_SIGNAL_INFO;
 193
 194     case NBSD_SIGUSR1:
 195       return GDB_SIGNAL_USR1;
 196
 197     case NBSD_SIGUSR2:
 198       return GDB_SIGNAL_USR2;
 199
 200     case NBSD_SIGPWR:
 201       return GDB_SIGNAL_PWR;
 202
 203     /* SIGRTMIN and SIGRTMAX are not continuous in <gdb/signals.def>,
 204        therefore we have to handle them here.  */
 205     case NBSD_SIGRTMIN:
 206       return GDB_SIGNAL_REALTIME_33;
 207
 208     case NBSD_SIGRTMAX:
 209       return GDB_SIGNAL_REALTIME_63;
 210     }
 211
 212   if (signal >= NBSD_SIGRTMIN + 1 && signal <= NBSD_SIGRTMAX - 1)
 213     {
 214       int offset = signal - NBSD_SIGRTMIN + 1;
 215
 216       return (enum gdb_signal) ((int) GDB_SIGNAL_REALTIME_34 + offset);
 217     }
 218
 219   return GDB_SIGNAL_UNKNOWN;
 220 }
 221
 222 /* Implement the "gdb_signal_to_target" gdbarch method.  */
 223
 224 static int
 225 nbsd_gdb_signal_to_target (struct gdbarch *gdbarch,
 226                 enum gdb_signal signal)
 227 {
 228   switch (signal)
 229     {
 230     case GDB_SIGNAL_0:
 231       return 0;
 232
 233     case GDB_SIGNAL_HUP:
 234       return NBSD_SIGHUP;
 235
 236     case GDB_SIGNAL_INT:
 237       return NBSD_SIGINT;
 238
 239     case GDB_SIGNAL_QUIT:
 240       return NBSD_SIGQUIT;
 241
 242     case GDB_SIGNAL_ILL:
 243       return NBSD_SIGILL;
 244
 245     case GDB_SIGNAL_TRAP:
 246       return NBSD_SIGTRAP;
 247
 248     case GDB_SIGNAL_ABRT:
 249       return NBSD_SIGABRT;
 250
 251     case GDB_SIGNAL_EMT:
 252       return NBSD_SIGEMT;
 253
 254     case GDB_SIGNAL_FPE:
 255       return NBSD_SIGFPE;
 256
 257     case GDB_SIGNAL_KILL:
 258       return NBSD_SIGKILL;
 259
 260     case GDB_SIGNAL_BUS:
 261       return NBSD_SIGBUS;
 262
 263     case GDB_SIGNAL_SEGV:
 264       return NBSD_SIGSEGV;
 265
 266     case GDB_SIGNAL_SYS:
 267       return NBSD_SIGSYS;
 268
 269     case GDB_SIGNAL_PIPE:
 270       return NBSD_SIGPIPE;
 271
 272     case GDB_SIGNAL_ALRM:
 273       return NBSD_SIGALRM;
 274
 275     case GDB_SIGNAL_TERM:
 276       return NBSD_SIGTERM;
 277
 278     case GDB_SIGNAL_URG:
 279       return NBSD_SIGSTOP;
 280
 281     case GDB_SIGNAL_TSTP:
 282       return NBSD_SIGTSTP;
 283
 284     case GDB_SIGNAL_CONT:
 285       return NBSD_SIGCONT;
 286
 287     case GDB_SIGNAL_CHLD:
 288       return NBSD_SIGCHLD;
 289
 290     case GDB_SIGNAL_TTIN:
 291       return NBSD_SIGTTIN;
 292
 293     case GDB_SIGNAL_TTOU:
 294       return NBSD_SIGTTOU;
 295
 296     case GDB_SIGNAL_IO:
 297       return NBSD_SIGIO;
 298
 299     case GDB_SIGNAL_XCPU:
 300       return NBSD_SIGXCPU;
 301
 302     case GDB_SIGNAL_XFSZ:
 303       return NBSD_SIGXFSZ;
 304
 305     case GDB_SIGNAL_VTALRM:
 306       return NBSD_SIGVTALRM;
 307
 308     case GDB_SIGNAL_PROF:
 309       return NBSD_SIGPROF;
 310
 311     case GDB_SIGNAL_WINCH:
 312       return NBSD_SIGWINCH;
 313
 314     case GDB_SIGNAL_INFO:
 315       return NBSD_SIGINFO;
 316
 317     case GDB_SIGNAL_USR1:
 318       return NBSD_SIGUSR1;
 319
 320     case GDB_SIGNAL_USR2:
 321       return NBSD_SIGUSR2;
 322
 323     case GDB_SIGNAL_PWR:
 324       return NBSD_SIGPWR;
 325
 326     /* GDB_SIGNAL_REALTIME_33 is not continuous in <gdb/signals.def>,
 327        therefore we have to handle it here.  */
 328     case GDB_SIGNAL_REALTIME_33:
 329       return NBSD_SIGRTMIN;
 330
 331     /* Same comment applies to _64.  */
 332     case GDB_SIGNAL_REALTIME_63:
 333       return NBSD_SIGRTMAX;
 334     }
 335
 336   if (signal >= GDB_SIGNAL_REALTIME_34
 337       && signal <= GDB_SIGNAL_REALTIME_62)
 338     {
 339       int offset = signal - GDB_SIGNAL_REALTIME_32;
 340
 341       return NBSD_SIGRTMIN + 1 + offset;
 342     }
 343
 344   return -1;
 345 }
 346
 347 /* Shared library resolver handling.  */
 348
 349 static CORE_ADDR
 350 nbsd_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc)
 351 {
 352   struct bound_minimal_symbol msym;
 353
 354   msym = lookup_minimal_symbol ("_rtld_bind_start", NULL, NULL);
 355   if (msym.minsym && msym.value_address () == pc)
 356     return frame_unwind_caller_pc (get_current_frame ());
 357   else
 358     return find_solib_trampoline_target (get_current_frame (), pc);
 359 }
 360
 361 struct nbsd_gdbarch_data
 362 {
 363   struct type *siginfo_type = nullptr;
 364 };
 365
 366 static const registry<gdbarch>::key<nbsd_gdbarch_data>
 367      nbsd_gdbarch_data_handle;
 368
 369 static struct nbsd_gdbarch_data *
 370 get_nbsd_gdbarch_data (struct gdbarch *gdbarch)
 371 {
 372   struct nbsd_gdbarch_data *result = nbsd_gdbarch_data_handle.get (gdbarch);
 373   if (result == nullptr)
 374     result = nbsd_gdbarch_data_handle.emplace (gdbarch);
 375   return result;
 376 }
 377
 378 /* Implement the "get_siginfo_type" gdbarch method.  */
 379
 380 static struct type *
 381 nbsd_get_siginfo_type (struct gdbarch *gdbarch)
 382 {
 383   nbsd_gdbarch_data *nbsd_gdbarch_data = get_nbsd_gdbarch_data (gdbarch);
 384   if (nbsd_gdbarch_data->siginfo_type != NULL)
 385     return nbsd_gdbarch_data->siginfo_type;
 386
 387   type *char_type = builtin_type (gdbarch)->builtin_char;
 388   type *int_type = builtin_type (gdbarch)->builtin_int;
 389   type *long_type = builtin_type (gdbarch)->builtin_long;
 390
 391   type *void_ptr_type
 392     = lookup_pointer_type (builtin_type (gdbarch)->builtin_void);
 393
 394   type *int32_type = builtin_type (gdbarch)->builtin_int32;
 395   type *uint32_type = builtin_type (gdbarch)->builtin_uint32;
 396   type *uint64_type = builtin_type (gdbarch)->builtin_uint64;
 397
 398   bool lp64 = void_ptr_type->length () == 8;
 399   size_t char_bits = gdbarch_addressable_memory_unit_size (gdbarch) * 8;
 400
 401   /* pid_t */
 402   type_allocator alloc (gdbarch);
 403   type *pid_type = alloc.new_type (TYPE_CODE_TYPEDEF,
 404                                    int32_type->length () * char_bits,
 405                                    "pid_t");
 406   pid_type->set_target_type (int32_type);
 407
 408   /* uid_t */
 409   type *uid_type = alloc.new_type (TYPE_CODE_TYPEDEF,
 410                                    uint32_type->length () * char_bits,
 411                                    "uid_t");
 412   uid_type->set_target_type (uint32_type);
 413
 414   /* clock_t */
 415   type *clock_type = alloc.new_type (TYPE_CODE_TYPEDEF,
 416                                      int_type->length () * char_bits,
 417                                      "clock_t");
 418   clock_type->set_target_type (int_type);
 419
 420   /* lwpid_t */
 421   type *lwpid_type = alloc.new_type (TYPE_CODE_TYPEDEF,
 422                                      int32_type->length () * char_bits,
 423                                      "lwpid_t");
 424   lwpid_type->set_target_type (int32_type);
 425
 426   /* union sigval */
 427   type *sigval_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
 428   sigval_type->set_name (gdbarch_obstack_strdup (gdbarch, "sigval"));
 429   append_composite_type_field (sigval_type, "sival_int", int_type);
 430   append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type);
 431
 432   /* union _option */
 433   type *option_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
 434   option_type->set_name (gdbarch_obstack_strdup (gdbarch, "_option"));
 435   append_composite_type_field (option_type, "_pe_other_pid", pid_type);
 436   append_composite_type_field (option_type, "_pe_lwp", lwpid_type);
 437
 438   /* union _reason */
 439   type *reason_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
 440
 441   /* _rt */
 442   type *t = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 443   append_composite_type_field (t, "_pid", pid_type);
 444   append_composite_type_field (t, "_uid", uid_type);
 445   append_composite_type_field (t, "_value", sigval_type);
 446   append_composite_type_field (reason_type, "_rt", t);
 447
 448   /* _child */
 449   t = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 450   append_composite_type_field (t, "_pid", pid_type);
 451   append_composite_type_field (t, "_uid", uid_type);
 452   append_composite_type_field (t, "_status", int_type);
 453   append_composite_type_field (t, "_utime", clock_type);
 454   append_composite_type_field (t, "_stime", clock_type);
 455   append_composite_type_field (reason_type, "_child", t);
 456
 457   /* _fault */
 458   t = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 459   append_composite_type_field (t, "_addr", void_ptr_type);
 460   append_composite_type_field (t, "_trap", int_type);
 461   append_composite_type_field (t, "_trap2", int_type);
 462   append_composite_type_field (t, "_trap3", int_type);
 463   append_composite_type_field (reason_type, "_fault", t);
 464
 465   /* _poll */
 466   t = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 467   append_composite_type_field (t, "_band", long_type);
 468   append_composite_type_field (t, "_fd", int_type);
 469   append_composite_type_field (reason_type, "_poll", t);
 470
 471   /* _syscall */
 472   t = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 473   append_composite_type_field (t, "_sysnum", int_type);
 474   append_composite_type_field (t, "_retval",
 475                                init_vector_type (int_type, 2));
 476   append_composite_type_field (t, "_error", int_type);
 477   append_composite_type_field (t, "_args",
 478                                init_vector_type (uint64_type, 8));
 479   append_composite_type_field (reason_type, "_syscall", t);
 480
 481   /* _ptrace_state */
 482   t = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 483   append_composite_type_field (t, "_pe_report_event", int_type);
 484   append_composite_type_field (t, "_option", option_type);
 485   append_composite_type_field (reason_type, "_ptrace_state", t);
 486
 487   /* struct _ksiginfo */
 488   type *ksiginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 489   ksiginfo_type->set_name (gdbarch_obstack_strdup (gdbarch, "_ksiginfo"));
 490   append_composite_type_field (ksiginfo_type, "_signo", int_type);
 491   append_composite_type_field (ksiginfo_type, "_code", int_type);
 492   append_composite_type_field (ksiginfo_type, "_errno", int_type);
 493   if (lp64)
 494     append_composite_type_field (ksiginfo_type, "_pad", int_type);
 495   append_composite_type_field (ksiginfo_type, "_reason", reason_type);
 496
 497   /* union siginfo */
 498   type *siginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
 499   siginfo_type->set_name (gdbarch_obstack_strdup (gdbarch, "siginfo"));
 500   append_composite_type_field (siginfo_type, "si_pad",
 501                                init_vector_type (char_type, 128));
 502   append_composite_type_field (siginfo_type, "_info", ksiginfo_type);
 503
 504   nbsd_gdbarch_data->siginfo_type = siginfo_type;
 505
 506   return siginfo_type;
 507 }
 508
 509 /* See netbsd-tdep.h.  */
 510
 511 void
 512 nbsd_info_proc_mappings_header (int addr_bit)
 513 {
 514   gdb_printf (_("Mapped address spaces:\n\n"));
 515   if (addr_bit == 64)
 516     {
 517       gdb_printf ("  %18s %18s %10s %10s %9s %s\n",
 518                   "Start Addr",
 519                   "  End Addr",
 520                   "      Size", "    Offset", "Flags  ", "File");
 521     }
 522   else
 523     {
 524       gdb_printf ("\t%10s %10s %10s %10s %9s %s\n",
 525                   "Start Addr",
 526                   "  End Addr",
 527                   "      Size", "    Offset", "Flags  ", "File");
 528     }
 529 }
 530
 531 /* Helper function to generate mappings flags for a single VM map
 532    entry in 'info proc mappings'.  */
 533
 534 static const char *
 535 nbsd_vm_map_entry_flags (int kve_flags, int kve_protection)
 536 {
 537   static char vm_flags[9];
 538
 539   vm_flags[0] = (kve_protection & KINFO_VME_PROT_READ) ? 'r' : '-';
 540   vm_flags[1] = (kve_protection & KINFO_VME_PROT_WRITE) ? 'w' : '-';
 541   vm_flags[2] = (kve_protection & KINFO_VME_PROT_EXEC) ? 'x' : '-';
 542   vm_flags[3] = ' ';
 543   vm_flags[4] = (kve_flags & KINFO_VME_FLAG_COW) ? 'C' : '-';
 544   vm_flags[5] = (kve_flags & KINFO_VME_FLAG_NEEDS_COPY) ? 'N' : '-';
 545   vm_flags[6] = (kve_flags & KINFO_VME_FLAG_PAGEABLE) ? 'P' : '-';
 546   vm_flags[7] = (kve_flags & KINFO_VME_FLAG_GROWS_UP) ? 'U'
 547     : (kve_flags & KINFO_VME_FLAG_GROWS_DOWN) ? 'D' : '-';
 548   vm_flags[8] = '\0';
 549
 550   return vm_flags;
 551 }
 552
 553 void
 554 nbsd_info_proc_mappings_entry (int addr_bit, ULONGEST kve_start,
 555                                ULONGEST kve_end, ULONGEST kve_offset,
 556                                int kve_flags, int kve_protection,
 557                                const char *kve_path)
 558 {
 559   if (addr_bit == 64)
 560     {
 561       gdb_printf ("  %18s %18s %10s %10s %9s %s\n",
 562                   hex_string (kve_start),
 563                   hex_string (kve_end),
 564                   hex_string (kve_end - kve_start),
 565                   hex_string (kve_offset),
 566                   nbsd_vm_map_entry_flags (kve_flags, kve_protection),
 567                   kve_path);
 568     }
 569   else
 570     {
 571       gdb_printf ("\t%10s %10s %10s %10s %9s %s\n",
 572                   hex_string (kve_start),
 573                   hex_string (kve_end),
 574                   hex_string (kve_end - kve_start),
 575                   hex_string (kve_offset),
 576                   nbsd_vm_map_entry_flags (kve_flags, kve_protection),
 577                   kve_path);
 578     }
 579 }
 580
 581 /* Implement the "get_syscall_number" gdbarch method.  */
 582
 583 static LONGEST
 584 nbsd_get_syscall_number (struct gdbarch *gdbarch, thread_info *thread)
 585 {
 586
 587   /* NetBSD doesn't use gdbarch_get_syscall_number since NetBSD
 588      native targets fetch the system call number from the
 589      'si_sysnum' member of siginfo_t in nbsd_nat_target::wait.
 590      However, system call catching requires this function to be
 591      set.  */
 592
 593   internal_error (_("nbsd_get_sycall_number called"));
 594 }
 595
 596 /* See netbsd-tdep.h.  */
 597
 598 void
 599 nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 600 {
 601   set_gdbarch_gdb_signal_from_target (gdbarch, nbsd_gdb_signal_from_target);
 602   set_gdbarch_gdb_signal_to_target (gdbarch, nbsd_gdb_signal_to_target);
 603   set_gdbarch_skip_solib_resolver (gdbarch, nbsd_skip_solib_resolver);
 604   set_gdbarch_auxv_parse (gdbarch, svr4_auxv_parse);
 605   set_gdbarch_get_siginfo_type (gdbarch, nbsd_get_siginfo_type);
 606
 607   /* `catch syscall' */
 608   set_xml_syscall_file_name (gdbarch, "syscalls/netbsd.xml");
 609   set_gdbarch_get_syscall_number (gdbarch, nbsd_get_syscall_number);
 610 }