| 1 | /* Common target-dependent code for NetBSD systems. |
| 2 | |
| 3 | Copyright (C) 2002-2020 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 "nbsd-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 | /* FIXME: kettenis/20060115: We should really eliminate the next two |
| 48 | functions completely. */ |
| 49 | |
| 50 | struct link_map_offsets * |
| 51 | nbsd_ilp32_solib_svr4_fetch_link_map_offsets (void) |
| 52 | { |
| 53 | return svr4_ilp32_fetch_link_map_offsets (); |
| 54 | } |
| 55 | |
| 56 | struct link_map_offsets * |
| 57 | nbsd_lp64_solib_svr4_fetch_link_map_offsets (void) |
| 58 | { |
| 59 | return svr4_lp64_fetch_link_map_offsets (); |
| 60 | } |
| 61 | |
| 62 | int |
| 63 | nbsd_pc_in_sigtramp (CORE_ADDR pc, const char *func_name) |
| 64 | { |
| 65 | /* Check for libc-provided signal trampoline. All such trampolines |
| 66 | have function names which begin with "__sigtramp". */ |
| 67 | |
| 68 | return (func_name != NULL |
| 69 | && startswith (func_name, "__sigtramp")); |
| 70 | } |
| 71 | |
| 72 | /* This enum is derived from NETBSD's <sys/signal.h>. */ |
| 73 | |
| 74 | enum |
| 75 | { |
| 76 | NBSD_SIGHUP = 1, |
| 77 | NBSD_SIGINT = 2, |
| 78 | NBSD_SIGQUIT = 3, |
| 79 | NBSD_SIGILL = 4, |
| 80 | NBSD_SIGTRAP = 5, |
| 81 | NBSD_SIGABRT = 6, |
| 82 | NBSD_SIGEMT = 7, |
| 83 | NBSD_SIGFPE = 8, |
| 84 | NBSD_SIGKILL = 9, |
| 85 | NBSD_SIGBUS = 10, |
| 86 | NBSD_SIGSEGV = 11, |
| 87 | NBSD_SIGSYS = 12, |
| 88 | NBSD_SIGPIPE = 13, |
| 89 | NBSD_SIGALRM = 14, |
| 90 | NBSD_SIGTERM = 15, |
| 91 | NBSD_SIGURG = 16, |
| 92 | NBSD_SIGSTOP = 17, |
| 93 | NBSD_SIGTSTP = 18, |
| 94 | NBSD_SIGCONT = 19, |
| 95 | NBSD_SIGCHLD = 20, |
| 96 | NBSD_SIGTTIN = 21, |
| 97 | NBSD_SIGTTOU = 22, |
| 98 | NBSD_SIGIO = 23, |
| 99 | NBSD_SIGXCPU = 24, |
| 100 | NBSD_SIGXFSZ = 25, |
| 101 | NBSD_SIGVTALRM = 26, |
| 102 | NBSD_SIGPROF = 27, |
| 103 | NBSD_SIGWINCH = 28, |
| 104 | NBSD_SIGINFO = 29, |
| 105 | NBSD_SIGUSR1 = 30, |
| 106 | NBSD_SIGUSR2 = 31, |
| 107 | NBSD_SIGPWR = 32, |
| 108 | NBSD_SIGRTMIN = 33, |
| 109 | NBSD_SIGRTMAX = 63, |
| 110 | }; |
| 111 | |
| 112 | /* Implement the "gdb_signal_from_target" gdbarch method. */ |
| 113 | |
| 114 | static enum gdb_signal |
| 115 | nbsd_gdb_signal_from_target (struct gdbarch *gdbarch, int signal) |
| 116 | { |
| 117 | switch (signal) |
| 118 | { |
| 119 | case 0: |
| 120 | return GDB_SIGNAL_0; |
| 121 | |
| 122 | case NBSD_SIGHUP: |
| 123 | return GDB_SIGNAL_HUP; |
| 124 | |
| 125 | case NBSD_SIGINT: |
| 126 | return GDB_SIGNAL_INT; |
| 127 | |
| 128 | case NBSD_SIGQUIT: |
| 129 | return GDB_SIGNAL_QUIT; |
| 130 | |
| 131 | case NBSD_SIGILL: |
| 132 | return GDB_SIGNAL_ILL; |
| 133 | |
| 134 | case NBSD_SIGTRAP: |
| 135 | return GDB_SIGNAL_TRAP; |
| 136 | |
| 137 | case NBSD_SIGABRT: |
| 138 | return GDB_SIGNAL_ABRT; |
| 139 | |
| 140 | case NBSD_SIGEMT: |
| 141 | return GDB_SIGNAL_EMT; |
| 142 | |
| 143 | case NBSD_SIGFPE: |
| 144 | return GDB_SIGNAL_FPE; |
| 145 | |
| 146 | case NBSD_SIGKILL: |
| 147 | return GDB_SIGNAL_KILL; |
| 148 | |
| 149 | case NBSD_SIGBUS: |
| 150 | return GDB_SIGNAL_BUS; |
| 151 | |
| 152 | case NBSD_SIGSEGV: |
| 153 | return GDB_SIGNAL_SEGV; |
| 154 | |
| 155 | case NBSD_SIGSYS: |
| 156 | return GDB_SIGNAL_SYS; |
| 157 | |
| 158 | case NBSD_SIGPIPE: |
| 159 | return GDB_SIGNAL_PIPE; |
| 160 | |
| 161 | case NBSD_SIGALRM: |
| 162 | return GDB_SIGNAL_ALRM; |
| 163 | |
| 164 | case NBSD_SIGTERM: |
| 165 | return GDB_SIGNAL_TERM; |
| 166 | |
| 167 | case NBSD_SIGURG: |
| 168 | return GDB_SIGNAL_URG; |
| 169 | |
| 170 | case NBSD_SIGSTOP: |
| 171 | return GDB_SIGNAL_STOP; |
| 172 | |
| 173 | case NBSD_SIGTSTP: |
| 174 | return GDB_SIGNAL_TSTP; |
| 175 | |
| 176 | case NBSD_SIGCONT: |
| 177 | return GDB_SIGNAL_CONT; |
| 178 | |
| 179 | case NBSD_SIGCHLD: |
| 180 | return GDB_SIGNAL_CHLD; |
| 181 | |
| 182 | case NBSD_SIGTTIN: |
| 183 | return GDB_SIGNAL_TTIN; |
| 184 | |
| 185 | case NBSD_SIGTTOU: |
| 186 | return GDB_SIGNAL_TTOU; |
| 187 | |
| 188 | case NBSD_SIGIO: |
| 189 | return GDB_SIGNAL_IO; |
| 190 | |
| 191 | case NBSD_SIGXCPU: |
| 192 | return GDB_SIGNAL_XCPU; |
| 193 | |
| 194 | case NBSD_SIGXFSZ: |
| 195 | return GDB_SIGNAL_XFSZ; |
| 196 | |
| 197 | case NBSD_SIGVTALRM: |
| 198 | return GDB_SIGNAL_VTALRM; |
| 199 | |
| 200 | case NBSD_SIGPROF: |
| 201 | return GDB_SIGNAL_PROF; |
| 202 | |
| 203 | case NBSD_SIGWINCH: |
| 204 | return GDB_SIGNAL_WINCH; |
| 205 | |
| 206 | case NBSD_SIGINFO: |
| 207 | return GDB_SIGNAL_INFO; |
| 208 | |
| 209 | case NBSD_SIGUSR1: |
| 210 | return GDB_SIGNAL_USR1; |
| 211 | |
| 212 | case NBSD_SIGUSR2: |
| 213 | return GDB_SIGNAL_USR2; |
| 214 | |
| 215 | case NBSD_SIGPWR: |
| 216 | return GDB_SIGNAL_PWR; |
| 217 | |
| 218 | /* SIGRTMIN and SIGRTMAX are not continuous in <gdb/signals.def>, |
| 219 | therefore we have to handle them here. */ |
| 220 | case NBSD_SIGRTMIN: |
| 221 | return GDB_SIGNAL_REALTIME_33; |
| 222 | |
| 223 | case NBSD_SIGRTMAX: |
| 224 | return GDB_SIGNAL_REALTIME_63; |
| 225 | } |
| 226 | |
| 227 | if (signal >= NBSD_SIGRTMIN + 1 && signal <= NBSD_SIGRTMAX - 1) |
| 228 | { |
| 229 | int offset = signal - NBSD_SIGRTMIN + 1; |
| 230 | |
| 231 | return (enum gdb_signal) ((int) GDB_SIGNAL_REALTIME_34 + offset); |
| 232 | } |
| 233 | |
| 234 | return GDB_SIGNAL_UNKNOWN; |
| 235 | } |
| 236 | |
| 237 | /* Implement the "gdb_signal_to_target" gdbarch method. */ |
| 238 | |
| 239 | static int |
| 240 | nbsd_gdb_signal_to_target (struct gdbarch *gdbarch, |
| 241 | enum gdb_signal signal) |
| 242 | { |
| 243 | switch (signal) |
| 244 | { |
| 245 | case GDB_SIGNAL_0: |
| 246 | return 0; |
| 247 | |
| 248 | case GDB_SIGNAL_HUP: |
| 249 | return NBSD_SIGHUP; |
| 250 | |
| 251 | case GDB_SIGNAL_INT: |
| 252 | return NBSD_SIGINT; |
| 253 | |
| 254 | case GDB_SIGNAL_QUIT: |
| 255 | return NBSD_SIGQUIT; |
| 256 | |
| 257 | case GDB_SIGNAL_ILL: |
| 258 | return NBSD_SIGILL; |
| 259 | |
| 260 | case GDB_SIGNAL_TRAP: |
| 261 | return NBSD_SIGTRAP; |
| 262 | |
| 263 | case GDB_SIGNAL_ABRT: |
| 264 | return NBSD_SIGABRT; |
| 265 | |
| 266 | case GDB_SIGNAL_EMT: |
| 267 | return NBSD_SIGEMT; |
| 268 | |
| 269 | case GDB_SIGNAL_FPE: |
| 270 | return NBSD_SIGFPE; |
| 271 | |
| 272 | case GDB_SIGNAL_KILL: |
| 273 | return NBSD_SIGKILL; |
| 274 | |
| 275 | case GDB_SIGNAL_BUS: |
| 276 | return NBSD_SIGBUS; |
| 277 | |
| 278 | case GDB_SIGNAL_SEGV: |
| 279 | return NBSD_SIGSEGV; |
| 280 | |
| 281 | case GDB_SIGNAL_SYS: |
| 282 | return NBSD_SIGSYS; |
| 283 | |
| 284 | case GDB_SIGNAL_PIPE: |
| 285 | return NBSD_SIGPIPE; |
| 286 | |
| 287 | case GDB_SIGNAL_ALRM: |
| 288 | return NBSD_SIGALRM; |
| 289 | |
| 290 | case GDB_SIGNAL_TERM: |
| 291 | return NBSD_SIGTERM; |
| 292 | |
| 293 | case GDB_SIGNAL_URG: |
| 294 | return NBSD_SIGSTOP; |
| 295 | |
| 296 | case GDB_SIGNAL_TSTP: |
| 297 | return NBSD_SIGTSTP; |
| 298 | |
| 299 | case GDB_SIGNAL_CONT: |
| 300 | return NBSD_SIGCONT; |
| 301 | |
| 302 | case GDB_SIGNAL_CHLD: |
| 303 | return NBSD_SIGCHLD; |
| 304 | |
| 305 | case GDB_SIGNAL_TTIN: |
| 306 | return NBSD_SIGTTIN; |
| 307 | |
| 308 | case GDB_SIGNAL_TTOU: |
| 309 | return NBSD_SIGTTOU; |
| 310 | |
| 311 | case GDB_SIGNAL_IO: |
| 312 | return NBSD_SIGIO; |
| 313 | |
| 314 | case GDB_SIGNAL_XCPU: |
| 315 | return NBSD_SIGXCPU; |
| 316 | |
| 317 | case GDB_SIGNAL_XFSZ: |
| 318 | return NBSD_SIGXFSZ; |
| 319 | |
| 320 | case GDB_SIGNAL_VTALRM: |
| 321 | return NBSD_SIGVTALRM; |
| 322 | |
| 323 | case GDB_SIGNAL_PROF: |
| 324 | return NBSD_SIGPROF; |
| 325 | |
| 326 | case GDB_SIGNAL_WINCH: |
| 327 | return NBSD_SIGWINCH; |
| 328 | |
| 329 | case GDB_SIGNAL_INFO: |
| 330 | return NBSD_SIGINFO; |
| 331 | |
| 332 | case GDB_SIGNAL_USR1: |
| 333 | return NBSD_SIGUSR1; |
| 334 | |
| 335 | case GDB_SIGNAL_USR2: |
| 336 | return NBSD_SIGUSR2; |
| 337 | |
| 338 | case GDB_SIGNAL_PWR: |
| 339 | return NBSD_SIGPWR; |
| 340 | |
| 341 | /* GDB_SIGNAL_REALTIME_33 is not continuous in <gdb/signals.def>, |
| 342 | therefore we have to handle it here. */ |
| 343 | case GDB_SIGNAL_REALTIME_33: |
| 344 | return NBSD_SIGRTMIN; |
| 345 | |
| 346 | /* Same comment applies to _64. */ |
| 347 | case GDB_SIGNAL_REALTIME_63: |
| 348 | return NBSD_SIGRTMAX; |
| 349 | } |
| 350 | |
| 351 | if (signal >= GDB_SIGNAL_REALTIME_34 |
| 352 | && signal <= GDB_SIGNAL_REALTIME_62) |
| 353 | { |
| 354 | int offset = signal - GDB_SIGNAL_REALTIME_32; |
| 355 | |
| 356 | return NBSD_SIGRTMIN + 1 + offset; |
| 357 | } |
| 358 | |
| 359 | return -1; |
| 360 | } |
| 361 | |
| 362 | /* Shared library resolver handling. */ |
| 363 | |
| 364 | static CORE_ADDR |
| 365 | nbsd_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc) |
| 366 | { |
| 367 | struct bound_minimal_symbol msym; |
| 368 | |
| 369 | msym = lookup_minimal_symbol ("_rtld_bind_start", NULL, NULL); |
| 370 | if (msym.minsym && BMSYMBOL_VALUE_ADDRESS (msym) == pc) |
| 371 | return frame_unwind_caller_pc (get_current_frame ()); |
| 372 | else |
| 373 | return find_solib_trampoline_target (get_current_frame (), pc); |
| 374 | } |
| 375 | |
| 376 | /* See nbsd-tdep.h. */ |
| 377 | |
| 378 | void |
| 379 | nbsd_info_proc_mappings_header (int addr_bit) |
| 380 | { |
| 381 | printf_filtered (_("Mapped address spaces:\n\n")); |
| 382 | if (addr_bit == 64) |
| 383 | { |
| 384 | printf_filtered (" %18s %18s %10s %10s %9s %s\n", |
| 385 | "Start Addr", |
| 386 | " End Addr", |
| 387 | " Size", " Offset", "Flags ", "File"); |
| 388 | } |
| 389 | else |
| 390 | { |
| 391 | printf_filtered ("\t%10s %10s %10s %10s %9s %s\n", |
| 392 | "Start Addr", |
| 393 | " End Addr", |
| 394 | " Size", " Offset", "Flags ", "File"); |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | /* Helper function to generate mappings flags for a single VM map |
| 399 | entry in 'info proc mappings'. */ |
| 400 | |
| 401 | static const char * |
| 402 | nbsd_vm_map_entry_flags (int kve_flags, int kve_protection) |
| 403 | { |
| 404 | static char vm_flags[9]; |
| 405 | |
| 406 | vm_flags[0] = (kve_protection & KINFO_VME_PROT_READ) ? 'r' : '-'; |
| 407 | vm_flags[1] = (kve_protection & KINFO_VME_PROT_WRITE) ? 'w' : '-'; |
| 408 | vm_flags[2] = (kve_protection & KINFO_VME_PROT_EXEC) ? 'x' : '-'; |
| 409 | vm_flags[3] = ' '; |
| 410 | vm_flags[4] = (kve_flags & KINFO_VME_FLAG_COW) ? 'C' : '-'; |
| 411 | vm_flags[5] = (kve_flags & KINFO_VME_FLAG_NEEDS_COPY) ? 'N' : '-'; |
| 412 | vm_flags[6] = (kve_flags & KINFO_VME_FLAG_PAGEABLE) ? 'P' : '-'; |
| 413 | vm_flags[7] = (kve_flags & KINFO_VME_FLAG_GROWS_UP) ? 'U' |
| 414 | : (kve_flags & KINFO_VME_FLAG_GROWS_DOWN) ? 'D' : '-'; |
| 415 | vm_flags[8] = '\0'; |
| 416 | |
| 417 | return vm_flags; |
| 418 | } |
| 419 | |
| 420 | void |
| 421 | nbsd_info_proc_mappings_entry (int addr_bit, ULONGEST kve_start, |
| 422 | ULONGEST kve_end, ULONGEST kve_offset, |
| 423 | int kve_flags, int kve_protection, |
| 424 | const char *kve_path) |
| 425 | { |
| 426 | if (addr_bit == 64) |
| 427 | { |
| 428 | printf_filtered (" %18s %18s %10s %10s %9s %s\n", |
| 429 | hex_string (kve_start), |
| 430 | hex_string (kve_end), |
| 431 | hex_string (kve_end - kve_start), |
| 432 | hex_string (kve_offset), |
| 433 | nbsd_vm_map_entry_flags (kve_flags, kve_protection), |
| 434 | kve_path); |
| 435 | } |
| 436 | else |
| 437 | { |
| 438 | printf_filtered ("\t%10s %10s %10s %10s %9s %s\n", |
| 439 | hex_string (kve_start), |
| 440 | hex_string (kve_end), |
| 441 | hex_string (kve_end - kve_start), |
| 442 | hex_string (kve_offset), |
| 443 | nbsd_vm_map_entry_flags (kve_flags, kve_protection), |
| 444 | kve_path); |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | /* Implement the "get_syscall_number" gdbarch method. */ |
| 449 | |
| 450 | static LONGEST |
| 451 | nbsd_get_syscall_number (struct gdbarch *gdbarch, thread_info *thread) |
| 452 | { |
| 453 | |
| 454 | /* NetBSD doesn't use gdbarch_get_syscall_number since NetBSD |
| 455 | native targets fetch the system call number from the |
| 456 | 'si_sysnum' member of siginfo_t in nbsd_nat_target::wait. |
| 457 | However, system call catching requires this function to be |
| 458 | set. */ |
| 459 | |
| 460 | internal_error (__FILE__, __LINE__, _("nbsd_get_sycall_number called")); |
| 461 | } |
| 462 | |
| 463 | /* See nbsd-tdep.h. */ |
| 464 | |
| 465 | void |
| 466 | nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 467 | { |
| 468 | set_gdbarch_gdb_signal_from_target (gdbarch, nbsd_gdb_signal_from_target); |
| 469 | set_gdbarch_gdb_signal_to_target (gdbarch, nbsd_gdb_signal_to_target); |
| 470 | set_gdbarch_skip_solib_resolver (gdbarch, nbsd_skip_solib_resolver); |
| 471 | set_gdbarch_auxv_parse (gdbarch, svr4_auxv_parse); |
| 472 | |
| 473 | /* `catch syscall' */ |
| 474 | set_xml_syscall_file_name (gdbarch, "syscalls/netbsd.xml"); |
| 475 | set_gdbarch_get_syscall_number (gdbarch, nbsd_get_syscall_number); |
| 476 | } |