| 1 | /* Semi-dynamic architecture support for GDB, the GNU debugger. |
| 2 | Copyright 1998, Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "bfd.h" |
| 22 | #include "gdbcmd.h" |
| 23 | |
| 24 | |
| 25 | /* start-sanitize-carp start-sanitize-vr4xxx */ |
| 26 | /* Convenience macro for allocting memory. */ |
| 27 | |
| 28 | #ifndef XMALLOC |
| 29 | #define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE)) |
| 30 | #endif |
| 31 | |
| 32 | /* end-sanitize-carp end-sanitize-vr4xxx */ |
| 33 | |
| 34 | /* Non-zero if we want to trace architecture code. */ |
| 35 | |
| 36 | #ifndef GDBARCH_DEBUG |
| 37 | #define GDBARCH_DEBUG 0 |
| 38 | #endif |
| 39 | int gdbarch_debug = GDBARCH_DEBUG; |
| 40 | |
| 41 | /* start-sanitize-carp start-sanitize-vr4xxx */ |
| 42 | |
| 43 | /* Maintain the struct gdbarch object */ |
| 44 | |
| 45 | struct gdbarch |
| 46 | { |
| 47 | /* basic architectural information */ |
| 48 | const struct bfd_arch_info *bfd_arch_info; |
| 49 | int byte_order; |
| 50 | |
| 51 | /* target specific vector. */ |
| 52 | struct gdbarch_tdep *tdep; |
| 53 | |
| 54 | /* per-architecture data-pointers */ |
| 55 | int nr_data; |
| 56 | void **data; |
| 57 | |
| 58 | /* per-architecture swap-regions */ |
| 59 | struct gdbarch_swap *swap; |
| 60 | |
| 61 | /* Multi-arch values. |
| 62 | |
| 63 | When adding to the below you must also: declare/define set/get |
| 64 | value functions; override the corresponding macro in gdbarch.h; |
| 65 | if zero/NULL is not a suitable default, initialize the field in |
| 66 | gdbarch_alloc(); confirm that the target updated the value |
| 67 | correctly in verify_gdbarch(); add a fprintf_unfiltered call to |
| 68 | gdbarch_update() so that the new field is dumped out; append an |
| 69 | initial value to the static variable ``default_gdbarch'' (base |
| 70 | values on the host's c-type system). */ |
| 71 | |
| 72 | int long_bit; |
| 73 | int long_long_bit; |
| 74 | int ptr_bit; |
| 75 | |
| 76 | }; |
| 77 | |
| 78 | |
| 79 | struct gdbarch_tdep * |
| 80 | gdbarch_tdep (gdbarch) |
| 81 | struct gdbarch *gdbarch; |
| 82 | { |
| 83 | return gdbarch->tdep; |
| 84 | } |
| 85 | |
| 86 | const struct bfd_arch_info * |
| 87 | gdbarch_bfd_arch_info (gdbarch) |
| 88 | struct gdbarch *gdbarch; |
| 89 | { |
| 90 | return gdbarch->bfd_arch_info; |
| 91 | } |
| 92 | |
| 93 | int |
| 94 | gdbarch_byte_order (gdbarch) |
| 95 | struct gdbarch *gdbarch; |
| 96 | { |
| 97 | return gdbarch->byte_order; |
| 98 | } |
| 99 | |
| 100 | int |
| 101 | gdbarch_long_bit (gdbarch) |
| 102 | struct gdbarch *gdbarch; |
| 103 | { |
| 104 | return gdbarch->long_bit; |
| 105 | } |
| 106 | |
| 107 | void |
| 108 | set_gdbarch_long_bit (gdbarch, long_bit) |
| 109 | struct gdbarch *gdbarch; |
| 110 | int long_bit; |
| 111 | { |
| 112 | gdbarch->long_bit = long_bit; |
| 113 | } |
| 114 | |
| 115 | int |
| 116 | gdbarch_long_long_bit (gdbarch) |
| 117 | struct gdbarch *gdbarch; |
| 118 | { |
| 119 | return gdbarch->long_long_bit; |
| 120 | } |
| 121 | |
| 122 | void |
| 123 | set_gdbarch_long_long_bit (gdbarch, long_long_bit) |
| 124 | struct gdbarch *gdbarch; |
| 125 | int long_long_bit; |
| 126 | { |
| 127 | gdbarch->long_long_bit = long_long_bit; |
| 128 | } |
| 129 | |
| 130 | int |
| 131 | gdbarch_ptr_bit (gdbarch) |
| 132 | struct gdbarch *gdbarch; |
| 133 | { |
| 134 | return gdbarch->ptr_bit; |
| 135 | } |
| 136 | |
| 137 | void |
| 138 | set_gdbarch_ptr_bit (gdbarch, ptr_bit) |
| 139 | struct gdbarch *gdbarch; |
| 140 | int ptr_bit; |
| 141 | { |
| 142 | gdbarch->ptr_bit = ptr_bit; |
| 143 | } |
| 144 | |
| 145 | |
| 146 | /* Ensure that all values in a GDBARCH are reasonable. XXX - should |
| 147 | this instead return a success/fail indication? */ |
| 148 | |
| 149 | static void |
| 150 | verify_gdbarch (gdbarch) |
| 151 | struct gdbarch *gdbarch; |
| 152 | { |
| 153 | /* fundamental */ |
| 154 | if (gdbarch->byte_order == 0) |
| 155 | fatal ("verify_gdbarch: byte-order unset"); |
| 156 | if (gdbarch->bfd_arch_info == NULL) |
| 157 | fatal ("verify_gdbarch: bfd_arch_info unset"); |
| 158 | /* more general */ |
| 159 | if (gdbarch->long_bit == 0) |
| 160 | fatal ("verify_gdbarch: long_bit invalid"); |
| 161 | if (gdbarch->long_long_bit == 0) |
| 162 | fatal ("verify_gdbarch: long_long_bit invalid"); |
| 163 | if (gdbarch->ptr_bit == 0) |
| 164 | fatal ("verify_gdbarch: ptr_bit invalid"); |
| 165 | } |
| 166 | |
| 167 | |
| 168 | /* Keep a registrary of per-architecture data-pointers required by GDB |
| 169 | modules. */ |
| 170 | |
| 171 | struct gdbarch_data |
| 172 | { |
| 173 | int index; |
| 174 | }; |
| 175 | |
| 176 | struct gdbarch_data_registration |
| 177 | { |
| 178 | gdbarch_data_ftype *init; |
| 179 | struct gdbarch_data *data; |
| 180 | struct gdbarch_data_registration *next; |
| 181 | }; |
| 182 | |
| 183 | struct gdbarch_data_registrary |
| 184 | { |
| 185 | int nr; |
| 186 | struct gdbarch_data_registration *registrations; |
| 187 | }; |
| 188 | |
| 189 | struct gdbarch_data_registrary gdbarch_data_registrary = |
| 190 | { |
| 191 | 0, NULL, |
| 192 | }; |
| 193 | |
| 194 | struct gdbarch_data * |
| 195 | register_gdbarch_data (init) |
| 196 | gdbarch_data_ftype *init; |
| 197 | { |
| 198 | struct gdbarch_data_registration **curr; |
| 199 | for (curr = &gdbarch_data_registrary.registrations; |
| 200 | (*curr) != NULL; |
| 201 | curr = &(*curr)->next); |
| 202 | (*curr) = XMALLOC (struct gdbarch_data_registration); |
| 203 | (*curr)->next = NULL; |
| 204 | (*curr)->init = init; |
| 205 | (*curr)->data = XMALLOC (struct gdbarch_data); |
| 206 | (*curr)->data->index = gdbarch_data_registrary.nr++; |
| 207 | return (*curr)->data; |
| 208 | } |
| 209 | |
| 210 | |
| 211 | /* Walk through all the registered users initializing each in turn. */ |
| 212 | |
| 213 | static void init_gdbarch_data PARAMS ((struct gdbarch *)); |
| 214 | static void |
| 215 | init_gdbarch_data (gdbarch) |
| 216 | struct gdbarch *gdbarch; |
| 217 | { |
| 218 | struct gdbarch_data_registration *rego; |
| 219 | gdbarch->nr_data = gdbarch_data_registrary.nr + 1; |
| 220 | gdbarch->data = xmalloc (sizeof (void*) * gdbarch->nr_data); |
| 221 | for (rego = gdbarch_data_registrary.registrations; |
| 222 | rego != NULL; |
| 223 | rego = rego->next) |
| 224 | { |
| 225 | if (rego->data->index < gdbarch->nr_data) |
| 226 | gdbarch->data[rego->data->index] = rego->init (); |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | |
| 231 | /* Return the current value of the specified per-architecture |
| 232 | data-pointer. */ |
| 233 | |
| 234 | void * |
| 235 | gdbarch_data (data) |
| 236 | struct gdbarch_data *data; |
| 237 | { |
| 238 | if (data->index >= current_gdbarch->nr_data) |
| 239 | fatal ("gdbarch_data: request for non-existant data."); |
| 240 | return current_gdbarch->data[data->index]; |
| 241 | } |
| 242 | |
| 243 | |
| 244 | |
| 245 | /* Keep a registrary of swaped data required by GDB modules. */ |
| 246 | |
| 247 | struct gdbarch_swap |
| 248 | { |
| 249 | void *swap; |
| 250 | struct gdbarch_swap_registration *source; |
| 251 | struct gdbarch_swap *next; |
| 252 | }; |
| 253 | |
| 254 | struct gdbarch_swap_registration |
| 255 | { |
| 256 | void *data; |
| 257 | unsigned long sizeof_data; |
| 258 | gdbarch_swap_ftype *init; |
| 259 | struct gdbarch_swap_registration *next; |
| 260 | }; |
| 261 | |
| 262 | struct gdbarch_swap_registrary |
| 263 | { |
| 264 | int nr; |
| 265 | struct gdbarch_swap_registration *registrations; |
| 266 | }; |
| 267 | |
| 268 | struct gdbarch_swap_registrary gdbarch_swap_registrary = |
| 269 | { |
| 270 | 0, NULL, |
| 271 | }; |
| 272 | |
| 273 | void |
| 274 | register_gdbarch_swap (data, sizeof_data, init) |
| 275 | void *data; |
| 276 | unsigned long sizeof_data; |
| 277 | gdbarch_swap_ftype *init; |
| 278 | { |
| 279 | struct gdbarch_swap_registration **rego; |
| 280 | for (rego = &gdbarch_swap_registrary.registrations; |
| 281 | (*rego) != NULL; |
| 282 | rego = &(*rego)->next); |
| 283 | (*rego) = XMALLOC (struct gdbarch_swap_registration); |
| 284 | (*rego)->next = NULL; |
| 285 | (*rego)->init = init; |
| 286 | (*rego)->data = data; |
| 287 | (*rego)->sizeof_data = sizeof_data; |
| 288 | } |
| 289 | |
| 290 | |
| 291 | static void init_gdbarch_swap PARAMS ((struct gdbarch *)); |
| 292 | static void |
| 293 | init_gdbarch_swap (gdbarch) |
| 294 | struct gdbarch *gdbarch; |
| 295 | { |
| 296 | struct gdbarch_swap_registration *rego; |
| 297 | struct gdbarch_swap **curr = &gdbarch->swap; |
| 298 | for (rego = gdbarch_swap_registrary.registrations; |
| 299 | rego != NULL; |
| 300 | rego = rego->next) |
| 301 | { |
| 302 | if (rego->data != NULL) |
| 303 | { |
| 304 | (*curr) = XMALLOC (struct gdbarch_swap); |
| 305 | (*curr)->source = rego; |
| 306 | (*curr)->swap = xmalloc (rego->sizeof_data); |
| 307 | (*curr)->next = NULL; |
| 308 | memset (rego->data, 0, rego->sizeof_data); |
| 309 | curr = &(*curr)->next; |
| 310 | } |
| 311 | if (rego->init != NULL) |
| 312 | rego->init (); |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | static void swapout_gdbarch_swap PARAMS ((struct gdbarch *)); |
| 317 | static void |
| 318 | swapout_gdbarch_swap (gdbarch) |
| 319 | struct gdbarch *gdbarch; |
| 320 | { |
| 321 | struct gdbarch_swap *curr; |
| 322 | for (curr = gdbarch->swap; |
| 323 | curr != NULL; |
| 324 | curr = curr->next) |
| 325 | memcpy (curr->swap, curr->source->data, curr->source->sizeof_data); |
| 326 | } |
| 327 | |
| 328 | static void swapin_gdbarch_swap PARAMS ((struct gdbarch *)); |
| 329 | static void |
| 330 | swapin_gdbarch_swap (gdbarch) |
| 331 | struct gdbarch *gdbarch; |
| 332 | { |
| 333 | struct gdbarch_swap *curr; |
| 334 | for (curr = gdbarch->swap; |
| 335 | curr != NULL; |
| 336 | curr = curr->next) |
| 337 | memcpy (curr->source->data, curr->swap, curr->source->sizeof_data); |
| 338 | } |
| 339 | |
| 340 | |
| 341 | /* Keep a registrary of the architectures known by GDB. */ |
| 342 | |
| 343 | struct gdbarch_init_registration |
| 344 | { |
| 345 | enum bfd_architecture bfd_architecture; |
| 346 | gdbarch_init_ftype *init; |
| 347 | struct gdbarch_list *arches; |
| 348 | struct gdbarch_init_registration *next; |
| 349 | }; |
| 350 | |
| 351 | static struct gdbarch_init_registration *gdbarch_init_registrary = NULL; |
| 352 | |
| 353 | void |
| 354 | register_gdbarch_init (bfd_architecture, init) |
| 355 | enum bfd_architecture bfd_architecture; |
| 356 | gdbarch_init_ftype *init; |
| 357 | { |
| 358 | struct gdbarch_init_registration **curr; |
| 359 | const struct bfd_arch_info *bfd_arch_info; |
| 360 | /* Check that BFD reconizes this architecture */ |
| 361 | bfd_arch_info = bfd_lookup_arch (bfd_architecture, 0); |
| 362 | if (bfd_arch_info == NULL) |
| 363 | { |
| 364 | fatal ("Attempt to register unknown architecture (%d)", bfd_architecture); |
| 365 | } |
| 366 | /* Check that we haven't seen this architecture before */ |
| 367 | for (curr = &gdbarch_init_registrary; |
| 368 | (*curr) != NULL; |
| 369 | curr = &(*curr)->next) |
| 370 | { |
| 371 | if (bfd_architecture == (*curr)->bfd_architecture) |
| 372 | fatal ("Duplicate registraration of architecture (%s)", |
| 373 | bfd_arch_info->printable_name); |
| 374 | } |
| 375 | /* log it */ |
| 376 | if (gdbarch_debug) |
| 377 | fprintf_unfiltered (gdb_stderr, "register_gdbarch_init (%s, 0x%08lx)\n", |
| 378 | bfd_arch_info->printable_name, |
| 379 | (long) init); |
| 380 | /* Append it */ |
| 381 | (*curr) = XMALLOC (struct gdbarch_init_registration); |
| 382 | (*curr)->bfd_architecture = bfd_architecture; |
| 383 | (*curr)->init = init; |
| 384 | (*curr)->arches = NULL; |
| 385 | (*curr)->next = NULL; |
| 386 | } |
| 387 | |
| 388 | |
| 389 | |
| 390 | /* Look for an architecture using gdbarch_info. Base search on only |
| 391 | BFD_ARCH_INFO and BYTE_ORDER. */ |
| 392 | |
| 393 | struct gdbarch_list * |
| 394 | gdbarch_list_lookup_by_info (arches, info) |
| 395 | struct gdbarch_list *arches; |
| 396 | const struct gdbarch_info *info; |
| 397 | { |
| 398 | for (; arches != NULL; arches = arches->next) |
| 399 | { |
| 400 | if (info->bfd_arch_info != arches->gdbarch->bfd_arch_info) |
| 401 | continue; |
| 402 | if (info->byte_order != arches->gdbarch->byte_order) |
| 403 | continue; |
| 404 | return arches; |
| 405 | } |
| 406 | return NULL; |
| 407 | } |
| 408 | |
| 409 | |
| 410 | /* Create a new ``struct gdbarch'' based in information provied by |
| 411 | ``struct gdbarch_info'' */ |
| 412 | |
| 413 | struct gdbarch * |
| 414 | gdbarch_alloc (info, tdep) |
| 415 | const struct gdbarch_info *info; |
| 416 | struct gdbarch_tdep *tdep; |
| 417 | { |
| 418 | struct gdbarch *gdbarch = XMALLOC (struct gdbarch); |
| 419 | memset (gdbarch, 0, sizeof (*gdbarch)); |
| 420 | |
| 421 | gdbarch->tdep = tdep; |
| 422 | |
| 423 | gdbarch->bfd_arch_info = info->bfd_arch_info; |
| 424 | gdbarch->byte_order = info->byte_order; |
| 425 | |
| 426 | return gdbarch; |
| 427 | } |
| 428 | |
| 429 | /* Update the current architecture. Return ZERO if the update request |
| 430 | failed. */ |
| 431 | |
| 432 | int |
| 433 | gdbarch_update (info) |
| 434 | struct gdbarch_info info; |
| 435 | { |
| 436 | struct gdbarch *new_gdbarch; |
| 437 | struct gdbarch_list **list; |
| 438 | struct gdbarch_init_registration *rego; |
| 439 | |
| 440 | /* Fill in any missing bits. Most important is the bfd_architecture |
| 441 | which is used to select the target architecture. */ |
| 442 | if (info.bfd_architecture == bfd_arch_unknown) |
| 443 | { |
| 444 | if (info.bfd_arch_info != NULL) |
| 445 | info.bfd_architecture = info.bfd_arch_info->arch; |
| 446 | else if (info.abfd != NULL) |
| 447 | info.bfd_architecture = bfd_get_arch (info.abfd); |
| 448 | /* FIXME - should query BFD for its default architecture. */ |
| 449 | else |
| 450 | info.bfd_architecture = current_gdbarch->bfd_arch_info->arch; |
| 451 | } |
| 452 | if (info.bfd_arch_info == NULL) |
| 453 | { |
| 454 | if (target_architecture_auto && info.abfd != NULL) |
| 455 | info.bfd_arch_info = bfd_get_arch_info (info.abfd); |
| 456 | else |
| 457 | info.bfd_arch_info = current_gdbarch->bfd_arch_info; |
| 458 | } |
| 459 | if (info.byte_order == 0) |
| 460 | { |
| 461 | if (target_byte_order_auto && info.abfd != NULL) |
| 462 | info.byte_order = (bfd_big_endian (info.abfd) ? BIG_ENDIAN |
| 463 | : bfd_little_endian (info.abfd) ? LITTLE_ENDIAN |
| 464 | : 0); |
| 465 | else |
| 466 | info.byte_order = current_gdbarch->byte_order; |
| 467 | } |
| 468 | /* A default for abfd? */ |
| 469 | |
| 470 | /* Find the target that knows about this architecture. */ |
| 471 | for (rego = gdbarch_init_registrary; |
| 472 | rego != NULL && rego->bfd_architecture != info.bfd_architecture; |
| 473 | rego = rego->next); |
| 474 | if (rego == NULL) |
| 475 | { |
| 476 | if (gdbarch_debug) |
| 477 | fprintf_unfiltered (gdb_stderr, "gdbarch_update: No matching architecture\n"); |
| 478 | return 0; |
| 479 | } |
| 480 | |
| 481 | if (gdbarch_debug) |
| 482 | { |
| 483 | fprintf_unfiltered (gdb_stderr, |
| 484 | "gdbarch_update: info.bfd_architecture %d (%s)\n", |
| 485 | info.bfd_architecture, |
| 486 | bfd_lookup_arch (info.bfd_architecture, 0)->printable_name); |
| 487 | fprintf_unfiltered (gdb_stderr, |
| 488 | "gdbarch_update: info.bfd_arch_info %s\n", |
| 489 | (info.bfd_arch_info != NULL |
| 490 | ? info.bfd_arch_info->printable_name |
| 491 | : "(null)")); |
| 492 | fprintf_unfiltered (gdb_stderr, |
| 493 | "gdbarch_update: info.byte_order %d (%s)\n", |
| 494 | info.byte_order, |
| 495 | (info.byte_order == BIG_ENDIAN ? "big" |
| 496 | : info.byte_order == LITTLE_ENDIAN ? "little" |
| 497 | : "default")); |
| 498 | fprintf_unfiltered (gdb_stderr, |
| 499 | "gdbarch_update: info.abfd 0x%lx\n", |
| 500 | (long) info.abfd); |
| 501 | fprintf_unfiltered (gdb_stderr, |
| 502 | "gdbarch_update: info.tdep_info 0x%lx\n", |
| 503 | (long) info.tdep_info); |
| 504 | } |
| 505 | |
| 506 | /* Ask the target for a replacement architecture. */ |
| 507 | new_gdbarch = rego->init (info, rego->arches); |
| 508 | |
| 509 | /* Did the target like it? No. Reject the change. */ |
| 510 | if (new_gdbarch == NULL) |
| 511 | { |
| 512 | if (gdbarch_debug) |
| 513 | fprintf_unfiltered (gdb_stderr, "gdbarch_update: Target rejected architecture\n"); |
| 514 | return 0; |
| 515 | } |
| 516 | |
| 517 | /* Did the architecture change? No. Do nothing. */ |
| 518 | if (current_gdbarch == new_gdbarch) |
| 519 | { |
| 520 | if (gdbarch_debug) |
| 521 | fprintf_unfiltered (gdb_stderr, "gdbarch_update: Architecture 0x%08lx (%s) unchanged\n", |
| 522 | (long) new_gdbarch, |
| 523 | new_gdbarch->bfd_arch_info->printable_name); |
| 524 | return 1; |
| 525 | } |
| 526 | |
| 527 | /* Swap all data belonging to the old target out */ |
| 528 | swapout_gdbarch_swap (current_gdbarch); |
| 529 | |
| 530 | /* Is this a pre-existing architecture? Yes. Swap it in. */ |
| 531 | for (list = ®o->arches; |
| 532 | (*list) != NULL; |
| 533 | list = &(*list)->next) |
| 534 | { |
| 535 | if ((*list)->gdbarch == new_gdbarch) |
| 536 | { |
| 537 | if (gdbarch_debug) |
| 538 | fprintf_unfiltered (gdb_stderr, "gdbarch_update: Previous architecture 0x%08lx (%s) selected\n", |
| 539 | (long) new_gdbarch, |
| 540 | new_gdbarch->bfd_arch_info->printable_name); |
| 541 | current_gdbarch = new_gdbarch; |
| 542 | swapin_gdbarch_swap (new_gdbarch); |
| 543 | return 1; |
| 544 | } |
| 545 | } |
| 546 | |
| 547 | /* Append this new architecture to this targets list. */ |
| 548 | (*list) = XMALLOC (struct gdbarch_list); |
| 549 | (*list)->next = NULL; |
| 550 | (*list)->gdbarch = new_gdbarch; |
| 551 | |
| 552 | /* Switch to this new architecture. Dump it out. */ |
| 553 | current_gdbarch = new_gdbarch; |
| 554 | if (gdbarch_debug) |
| 555 | { |
| 556 | fprintf_unfiltered (gdb_stderr, |
| 557 | "gdbarch_update: New architecture 0x%08lx (%s) selected\n", |
| 558 | (long) new_gdbarch, |
| 559 | new_gdbarch->bfd_arch_info->printable_name); |
| 560 | fprintf_unfiltered (gdb_stderr, |
| 561 | "gdbarch_update: TARGET_BYTE_ORDER = %d (%s)\n", |
| 562 | TARGET_BYTE_ORDER, |
| 563 | (TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" |
| 564 | : TARGET_BYTE_ORDER == LITTLE_ENDIAN ? "little" |
| 565 | : "default")); |
| 566 | fprintf_unfiltered (gdb_stderr, |
| 567 | "gdbarch_update: TARGET_LONG_BIT = %d\n", |
| 568 | TARGET_LONG_BIT); |
| 569 | fprintf_unfiltered (gdb_stderr, |
| 570 | "gdbarch_update: TARGET_LONG_LONG_BIT = %d\n", |
| 571 | TARGET_LONG_LONG_BIT); |
| 572 | fprintf_unfiltered (gdb_stderr, |
| 573 | "gdbarch_update: TARGET_PTR_BIT = %d\n", |
| 574 | TARGET_PTR_BIT); |
| 575 | } |
| 576 | |
| 577 | /* Check that the newly installed architecture is valid. */ |
| 578 | verify_gdbarch (new_gdbarch); |
| 579 | |
| 580 | /* Initialize the per-architecture memory (swap) areas. |
| 581 | CURRENT_GDBARCH must be update before these modules are |
| 582 | called. */ |
| 583 | init_gdbarch_swap (new_gdbarch); |
| 584 | |
| 585 | /* Initialize the per-architecture data-pointer of all parties that |
| 586 | registered an interest in this architecture. CURRENT_GDBARCH |
| 587 | must be updated before these modules are called. */ |
| 588 | init_gdbarch_data (new_gdbarch); |
| 589 | |
| 590 | return 1; |
| 591 | } |
| 592 | |
| 593 | |
| 594 | /* end-sanitize-carp end-sanitize-vr4xxx */ |
| 595 | |
| 596 | /* Functions to manipulate the endianness of the target. */ |
| 597 | |
| 598 | #ifdef TARGET_BYTE_ORDER_SELECTABLE |
| 599 | /* compat - Catch old targets that expect a selectable byte-order to |
| 600 | default to BIG_ENDIAN */ |
| 601 | #ifndef TARGET_BYTE_ORDER_DEFAULT |
| 602 | #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN |
| 603 | #endif |
| 604 | #endif |
| 605 | #ifndef TARGET_BYTE_ORDER_DEFAULT |
| 606 | /* compat - Catch old non byte-order selectable targets that do not |
| 607 | define TARGET_BYTE_ORDER_DEFAULT and instead expect |
| 608 | TARGET_BYTE_ORDER to be used as the default. For targets that |
| 609 | defined neither TARGET_BYTE_ORDER nor TARGET_BYTE_ORDER_DEFAULT the |
| 610 | below will get a strange compiler warning. */ |
| 611 | #define TARGET_BYTE_ORDER_DEFAULT TARGET_BYTE_ORDER |
| 612 | #endif |
| 613 | int target_byte_order = TARGET_BYTE_ORDER_DEFAULT; |
| 614 | int target_byte_order_auto = 1; |
| 615 | |
| 616 | /* Chain containing the \"set endian\" commands. */ |
| 617 | static struct cmd_list_element *endianlist = NULL; |
| 618 | |
| 619 | /* Called by ``show endian''. */ |
| 620 | static void show_endian PARAMS ((char *, int)); |
| 621 | static void |
| 622 | show_endian (args, from_tty) |
| 623 | char *args; |
| 624 | int from_tty; |
| 625 | { |
| 626 | char *msg = |
| 627 | (TARGET_BYTE_ORDER_AUTO |
| 628 | ? "The target endianness is set automatically (currently %s endian)\n" |
| 629 | : "The target is assumed to be %s endian\n"); |
| 630 | printf_unfiltered (msg, (TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little")); |
| 631 | } |
| 632 | |
| 633 | /* Called if the user enters ``set endian'' without an argument. */ |
| 634 | static void set_endian PARAMS ((char *, int)); |
| 635 | static void |
| 636 | set_endian (args, from_tty) |
| 637 | char *args; |
| 638 | int from_tty; |
| 639 | { |
| 640 | printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n"); |
| 641 | show_endian (args, from_tty); |
| 642 | } |
| 643 | |
| 644 | /* Called by ``set endian big''. */ |
| 645 | static void set_endian_big PARAMS ((char *, int)); |
| 646 | static void |
| 647 | set_endian_big (args, from_tty) |
| 648 | char *args; |
| 649 | int from_tty; |
| 650 | { |
| 651 | if (TARGET_BYTE_ORDER_SELECTABLE_P) |
| 652 | { |
| 653 | target_byte_order = BIG_ENDIAN; |
| 654 | target_byte_order_auto = 0; |
| 655 | /* start-sanitize-carp start-sanitize-vr4xxx */ |
| 656 | if (GDB_MULTI_ARCH) |
| 657 | { |
| 658 | struct gdbarch_info info; |
| 659 | memset (&info, 0, sizeof info); |
| 660 | info.byte_order = BIG_ENDIAN; |
| 661 | gdbarch_update (info); |
| 662 | } |
| 663 | /* end-sanitize-carp end-sanitize-vr4xxx */ |
| 664 | } |
| 665 | else |
| 666 | { |
| 667 | printf_unfiltered ("Byte order is not selectable."); |
| 668 | show_endian (args, from_tty); |
| 669 | } |
| 670 | } |
| 671 | |
| 672 | /* Called by ``set endian little''. */ |
| 673 | static void set_endian_little PARAMS ((char *, int)); |
| 674 | static void |
| 675 | set_endian_little (args, from_tty) |
| 676 | char *args; |
| 677 | int from_tty; |
| 678 | { |
| 679 | if (TARGET_BYTE_ORDER_SELECTABLE_P) |
| 680 | { |
| 681 | target_byte_order = LITTLE_ENDIAN; |
| 682 | target_byte_order_auto = 0; |
| 683 | /* start-sanitize-carp start-sanitize-vr4xxx */ |
| 684 | if (GDB_MULTI_ARCH) |
| 685 | { |
| 686 | struct gdbarch_info info; |
| 687 | memset (&info, 0, sizeof info); |
| 688 | info.byte_order = LITTLE_ENDIAN; |
| 689 | gdbarch_update (info); |
| 690 | } |
| 691 | /* end-sanitize-carp end-sanitize-vr4xxx */ |
| 692 | } |
| 693 | else |
| 694 | { |
| 695 | printf_unfiltered ("Byte order is not selectable."); |
| 696 | show_endian (args, from_tty); |
| 697 | } |
| 698 | } |
| 699 | |
| 700 | /* Called by ``set endian auto''. */ |
| 701 | static void set_endian_auto PARAMS ((char *, int)); |
| 702 | static void |
| 703 | set_endian_auto (args, from_tty) |
| 704 | char *args; |
| 705 | int from_tty; |
| 706 | { |
| 707 | if (TARGET_BYTE_ORDER_SELECTABLE_P) |
| 708 | { |
| 709 | target_byte_order_auto = 1; |
| 710 | } |
| 711 | else |
| 712 | { |
| 713 | printf_unfiltered ("Byte order is not selectable."); |
| 714 | show_endian (args, from_tty); |
| 715 | } |
| 716 | } |
| 717 | |
| 718 | /* Set the endianness from a BFD. */ |
| 719 | static void set_endian_from_file PARAMS ((bfd *)); |
| 720 | static void |
| 721 | set_endian_from_file (abfd) |
| 722 | bfd *abfd; |
| 723 | { |
| 724 | if (TARGET_BYTE_ORDER_SELECTABLE_P) |
| 725 | { |
| 726 | int want; |
| 727 | |
| 728 | if (bfd_big_endian (abfd)) |
| 729 | want = BIG_ENDIAN; |
| 730 | else |
| 731 | want = LITTLE_ENDIAN; |
| 732 | if (TARGET_BYTE_ORDER_AUTO) |
| 733 | target_byte_order = want; |
| 734 | else if (TARGET_BYTE_ORDER != want) |
| 735 | warning ("%s endian file does not match %s endian target.", |
| 736 | want == BIG_ENDIAN ? "big" : "little", |
| 737 | TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"); |
| 738 | } |
| 739 | else |
| 740 | { |
| 741 | if (bfd_big_endian (abfd) |
| 742 | ? TARGET_BYTE_ORDER != BIG_ENDIAN |
| 743 | : TARGET_BYTE_ORDER == BIG_ENDIAN) |
| 744 | warning ("%s endian file does not match %s endian target.", |
| 745 | bfd_big_endian (abfd) ? "big" : "little", |
| 746 | TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"); |
| 747 | } |
| 748 | } |
| 749 | |
| 750 | |
| 751 | |
| 752 | /* Functions to manipulate the architecture of the target */ |
| 753 | |
| 754 | int target_architecture_auto = 1; |
| 755 | extern const struct bfd_arch_info bfd_default_arch_struct; |
| 756 | const struct bfd_arch_info *target_architecture = &bfd_default_arch_struct; |
| 757 | int (*target_architecture_hook) PARAMS ((const struct bfd_arch_info *ap)); |
| 758 | |
| 759 | /* Do the real work of changing the current architecture */ |
| 760 | static void |
| 761 | set_arch (arch) |
| 762 | const struct bfd_arch_info *arch; |
| 763 | { |
| 764 | /* FIXME: Is it compatible with gdb? */ |
| 765 | /* Check with the target on the setting */ |
| 766 | if (target_architecture_hook != NULL |
| 767 | && !target_architecture_hook (arch)) |
| 768 | printf_unfiltered ("Target does not support `%s' architecture.\n", |
| 769 | arch->printable_name); |
| 770 | else |
| 771 | { |
| 772 | target_architecture_auto = 0; |
| 773 | target_architecture = arch; |
| 774 | } |
| 775 | } |
| 776 | |
| 777 | /* Called if the user enters ``show architecture'' without an argument. */ |
| 778 | static void show_architecture PARAMS ((char *, int)); |
| 779 | static void |
| 780 | show_architecture (args, from_tty) |
| 781 | char *args; |
| 782 | int from_tty; |
| 783 | { |
| 784 | const char *arch; |
| 785 | arch = TARGET_ARCHITECTURE->printable_name; |
| 786 | if (target_architecture_auto) |
| 787 | printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); |
| 788 | else |
| 789 | printf_filtered ("The target architecture is assumed to be %s\n", arch); |
| 790 | } |
| 791 | |
| 792 | /* Called if the user enters ``set architecture'' with or without an |
| 793 | argument. */ |
| 794 | static void set_architecture PARAMS ((char *, int)); |
| 795 | static void |
| 796 | set_architecture (args, from_tty) |
| 797 | char *args; |
| 798 | int from_tty; |
| 799 | { |
| 800 | if (args == NULL) |
| 801 | { |
| 802 | printf_unfiltered ("\"set architecture\" must be followed by \"auto\" or an architecture name.\n"); |
| 803 | } |
| 804 | else if (strcmp (args, "auto") == 0) |
| 805 | { |
| 806 | target_architecture_auto = 1; |
| 807 | } |
| 808 | /* start-sanitize-carp start-sanitize-vr4xxx */ |
| 809 | else if (GDB_MULTI_ARCH) |
| 810 | { |
| 811 | const struct bfd_arch_info *arch = bfd_scan_arch (args); |
| 812 | if (arch == NULL) |
| 813 | printf_unfiltered ("Architecture `%s' not reconized.\n", args); |
| 814 | else |
| 815 | { |
| 816 | struct gdbarch_info info; |
| 817 | memset (&info, 0, sizeof info); |
| 818 | info.bfd_arch_info = arch; |
| 819 | if (gdbarch_update (info)) |
| 820 | target_architecture_auto = 0; |
| 821 | else |
| 822 | printf_unfiltered ("Architecture `%s' not reconized.\n", args); |
| 823 | } |
| 824 | } |
| 825 | /* end-sanitize-carp end-sanitize-vr4xxx */ |
| 826 | else |
| 827 | { |
| 828 | const struct bfd_arch_info *arch = bfd_scan_arch (args); |
| 829 | if (arch != NULL) |
| 830 | set_arch (arch); |
| 831 | else |
| 832 | printf_unfiltered ("Architecture `%s' not reconized.\n", args); |
| 833 | } |
| 834 | } |
| 835 | |
| 836 | /* Called if the user enters ``info architecture'' without an argument. */ |
| 837 | static void info_architecture PARAMS ((char *, int)); |
| 838 | static void |
| 839 | info_architecture (args, from_tty) |
| 840 | char *args; |
| 841 | int from_tty; |
| 842 | { |
| 843 | enum bfd_architecture a; |
| 844 | /* start-sanitize-carp start-sanitize-vr4xxx */ |
| 845 | if (GDB_MULTI_ARCH) |
| 846 | { |
| 847 | if (gdbarch_init_registrary != NULL) |
| 848 | { |
| 849 | struct gdbarch_init_registration *rego; |
| 850 | printf_filtered ("Available architectures are:\n"); |
| 851 | for (rego = gdbarch_init_registrary; |
| 852 | rego != NULL; |
| 853 | rego = rego->next) |
| 854 | { |
| 855 | const struct bfd_arch_info *ap; |
| 856 | ap = bfd_lookup_arch (rego->bfd_architecture, 0); |
| 857 | if (ap != NULL) |
| 858 | { |
| 859 | do |
| 860 | { |
| 861 | printf_filtered (" %s", ap->printable_name); |
| 862 | ap = ap->next; |
| 863 | } |
| 864 | while (ap != NULL); |
| 865 | printf_filtered ("\n"); |
| 866 | } |
| 867 | } |
| 868 | } |
| 869 | else |
| 870 | { |
| 871 | printf_filtered ("There are no available architectures.\n"); |
| 872 | } |
| 873 | return; |
| 874 | } |
| 875 | /* end-sanitize-carp end-sanitize-vr4xxx */ |
| 876 | printf_filtered ("Available architectures are:\n"); |
| 877 | for (a = bfd_arch_obscure + 1; a < bfd_arch_last; a++) |
| 878 | { |
| 879 | const struct bfd_arch_info *ap = bfd_lookup_arch (a, 0); |
| 880 | if (ap != NULL) |
| 881 | { |
| 882 | do |
| 883 | { |
| 884 | printf_filtered (" %s", ap->printable_name); |
| 885 | ap = ap->next; |
| 886 | } |
| 887 | while (ap != NULL); |
| 888 | printf_filtered ("\n"); |
| 889 | } |
| 890 | } |
| 891 | } |
| 892 | |
| 893 | /* Set the architecture from arch/machine */ |
| 894 | void |
| 895 | set_architecture_from_arch_mach (arch, mach) |
| 896 | enum bfd_architecture arch; |
| 897 | unsigned long mach; |
| 898 | { |
| 899 | const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach); |
| 900 | if (wanted != NULL) |
| 901 | set_arch (wanted); |
| 902 | else |
| 903 | fatal ("hardwired architecture/machine not reconized"); |
| 904 | } |
| 905 | |
| 906 | /* Set the architecture from a BFD */ |
| 907 | static void set_architecture_from_file PARAMS ((bfd *)); |
| 908 | static void |
| 909 | set_architecture_from_file (abfd) |
| 910 | bfd *abfd; |
| 911 | { |
| 912 | const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd); |
| 913 | if (target_architecture_auto) |
| 914 | { |
| 915 | if (target_architecture_hook != NULL |
| 916 | && !target_architecture_hook (wanted)) |
| 917 | warning ("Target may not support %s architecture", |
| 918 | wanted->printable_name); |
| 919 | target_architecture = wanted; |
| 920 | } |
| 921 | else if (wanted != target_architecture) |
| 922 | { |
| 923 | warning ("%s architecture file may be incompatible with %s target.", |
| 924 | wanted->printable_name, |
| 925 | target_architecture->printable_name); |
| 926 | } |
| 927 | } |
| 928 | |
| 929 | |
| 930 | |
| 931 | /* Disassembler */ |
| 932 | |
| 933 | /* Pointer to the target-dependent disassembly function. */ |
| 934 | int (*tm_print_insn) PARAMS ((bfd_vma, disassemble_info *)); |
| 935 | disassemble_info tm_print_insn_info; |
| 936 | |
| 937 | |
| 938 | |
| 939 | /* Set the dynamic target-system-dependant parameters (architecture, |
| 940 | byte-order) using information found in the BFD */ |
| 941 | |
| 942 | void |
| 943 | set_gdbarch_from_file (abfd) |
| 944 | bfd *abfd; |
| 945 | { |
| 946 | /* start-sanitize-carp start-sanitize-vr4xxx */ |
| 947 | if (GDB_MULTI_ARCH) |
| 948 | { |
| 949 | struct gdbarch_info info; |
| 950 | memset (&info, 0, sizeof info); |
| 951 | info.abfd = abfd; |
| 952 | gdbarch_update (info); |
| 953 | return; |
| 954 | } |
| 955 | /* end-sanitize-carp end-sanitize-vr4xxx */ |
| 956 | set_architecture_from_file (abfd); |
| 957 | set_endian_from_file (abfd); |
| 958 | } |
| 959 | |
| 960 | /* start-sanitize-carp start-sanitize-vr4xxx */ |
| 961 | |
| 962 | /* The default architecture uses host values (for want of a better |
| 963 | choice). */ |
| 964 | |
| 965 | struct gdbarch default_gdbarch = { |
| 966 | /* basic architecture information */ |
| 967 | &bfd_default_arch_struct, |
| 968 | TARGET_BYTE_ORDER_DEFAULT, |
| 969 | /* target specific vector */ |
| 970 | NULL, |
| 971 | /*per-architecture data-pointers and swap regions */ |
| 972 | 0, NULL, NULL, |
| 973 | /* Multi-arch values */ |
| 974 | 8 * sizeof (long), /* long */ |
| 975 | 8 * sizeof (LONGEST), /* long long */ |
| 976 | 8 * sizeof (void*), /* ptr */ |
| 977 | }; |
| 978 | struct gdbarch *current_gdbarch = &default_gdbarch; |
| 979 | |
| 980 | /* end-sanitize-carp end-sanitize-vr4xxx */ |
| 981 | |
| 982 | extern void _initialize_gdbarch PARAMS ((void)); |
| 983 | void |
| 984 | _initialize_gdbarch () |
| 985 | { |
| 986 | add_prefix_cmd ("endian", class_support, set_endian, |
| 987 | "Set endianness of target.", |
| 988 | &endianlist, "set endian ", 0, &setlist); |
| 989 | add_cmd ("big", class_support, set_endian_big, |
| 990 | "Set target as being big endian.", &endianlist); |
| 991 | add_cmd ("little", class_support, set_endian_little, |
| 992 | "Set target as being little endian.", &endianlist); |
| 993 | add_cmd ("auto", class_support, set_endian_auto, |
| 994 | "Select target endianness automatically.", &endianlist); |
| 995 | add_cmd ("endian", class_support, show_endian, |
| 996 | "Show endianness of target.", &showlist); |
| 997 | |
| 998 | add_cmd ("architecture", class_support, set_architecture, |
| 999 | "Set architecture of target.", &setlist); |
| 1000 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
| 1001 | add_cmd ("architecture", class_support, show_architecture, |
| 1002 | "Show architecture of target.", &showlist); |
| 1003 | add_cmd ("architecture", class_support, info_architecture, |
| 1004 | "List supported target architectures", &infolist); |
| 1005 | |
| 1006 | INIT_DISASSEMBLE_INFO_NO_ARCH (tm_print_insn_info, gdb_stdout, (fprintf_ftype)fprintf_filtered); |
| 1007 | tm_print_insn_info.flavour = bfd_target_unknown_flavour; |
| 1008 | tm_print_insn_info.read_memory_func = dis_asm_read_memory; |
| 1009 | tm_print_insn_info.memory_error_func = dis_asm_memory_error; |
| 1010 | tm_print_insn_info.print_address_func = dis_asm_print_address; |
| 1011 | |
| 1012 | #ifdef MAINTENANCE_CMDS |
| 1013 | add_show_from_set (add_set_cmd ("archdebug", |
| 1014 | class_maintenance, |
| 1015 | var_zinteger, |
| 1016 | (char *)&gdbarch_debug, |
| 1017 | "Set architecture debugging.\n\ |
| 1018 | When non-zero, architecture debugging is enabled.", &setlist), |
| 1019 | &showlist); |
| 1020 | #endif |
| 1021 | } |