| 1 | /* Dynamic architecture support for GDB, the GNU debugger. |
| 2 | Copyright 1998-1999, 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, |
| 19 | Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #include "defs.h" |
| 22 | |
| 23 | #if GDB_MULTI_ARCH |
| 24 | #include "gdbcmd.h" |
| 25 | #include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */ |
| 26 | #else |
| 27 | /* Just include everything in sight so that the every old definition |
| 28 | of macro is visible. */ |
| 29 | #include "gdb_string.h" |
| 30 | #include <ctype.h> |
| 31 | #include "symtab.h" |
| 32 | #include "frame.h" |
| 33 | #include "inferior.h" |
| 34 | #include "breakpoint.h" |
| 35 | #include "gdb_wait.h" |
| 36 | #include "gdbcore.h" |
| 37 | #include "gdbcmd.h" |
| 38 | #include "target.h" |
| 39 | #include "gdbthread.h" |
| 40 | #include "annotate.h" |
| 41 | #include "symfile.h" /* for overlay functions */ |
| 42 | #endif |
| 43 | |
| 44 | #include "version.h" |
| 45 | |
| 46 | #include "floatformat.h" |
| 47 | |
| 48 | /* Convenience macro for allocting typesafe memory. */ |
| 49 | |
| 50 | #ifndef XMALLOC |
| 51 | #define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE)) |
| 52 | #endif |
| 53 | |
| 54 | |
| 55 | /* Use the program counter to determine the contents and size |
| 56 | of a breakpoint instruction. If no target-dependent macro |
| 57 | BREAKPOINT_FROM_PC has been defined to implement this function, |
| 58 | assume that the breakpoint doesn't depend on the PC, and |
| 59 | use the values of the BIG_BREAKPOINT and LITTLE_BREAKPOINT macros. |
| 60 | Return a pointer to a string of bytes that encode a breakpoint |
| 61 | instruction, stores the length of the string to *lenptr, |
| 62 | and optionally adjust the pc to point to the correct memory location |
| 63 | for inserting the breakpoint. */ |
| 64 | |
| 65 | unsigned char * |
| 66 | legacy_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr) |
| 67 | { |
| 68 | /* {BIG_,LITTLE_}BREAKPOINT is the sequence of bytes we insert for a |
| 69 | breakpoint. On some machines, breakpoints are handled by the |
| 70 | target environment and we don't have to worry about them here. */ |
| 71 | #ifdef BIG_BREAKPOINT |
| 72 | if (TARGET_BYTE_ORDER == BIG_ENDIAN) |
| 73 | { |
| 74 | static unsigned char big_break_insn[] = BIG_BREAKPOINT; |
| 75 | *lenptr = sizeof (big_break_insn); |
| 76 | return big_break_insn; |
| 77 | } |
| 78 | #endif |
| 79 | #ifdef LITTLE_BREAKPOINT |
| 80 | if (TARGET_BYTE_ORDER != BIG_ENDIAN) |
| 81 | { |
| 82 | static unsigned char little_break_insn[] = LITTLE_BREAKPOINT; |
| 83 | *lenptr = sizeof (little_break_insn); |
| 84 | return little_break_insn; |
| 85 | } |
| 86 | #endif |
| 87 | #ifdef BREAKPOINT |
| 88 | { |
| 89 | static unsigned char break_insn[] = BREAKPOINT; |
| 90 | *lenptr = sizeof (break_insn); |
| 91 | return break_insn; |
| 92 | } |
| 93 | #endif |
| 94 | *lenptr = 0; |
| 95 | return NULL; |
| 96 | } |
| 97 | |
| 98 | int |
| 99 | generic_frameless_function_invocation_not (struct frame_info *fi) |
| 100 | { |
| 101 | return 0; |
| 102 | } |
| 103 | |
| 104 | int |
| 105 | generic_return_value_on_stack_not (struct type *type) |
| 106 | { |
| 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | char * |
| 111 | legacy_register_name (int i) |
| 112 | { |
| 113 | #ifdef REGISTER_NAMES |
| 114 | static char *names[] = REGISTER_NAMES; |
| 115 | if (i < 0 || i >= (sizeof (names) / sizeof (*names))) |
| 116 | return NULL; |
| 117 | else |
| 118 | return names[i]; |
| 119 | #else |
| 120 | internal_error ("legacy_register_name: called."); |
| 121 | return NULL; |
| 122 | #endif |
| 123 | } |
| 124 | |
| 125 | #if defined (CALL_DUMMY) |
| 126 | LONGEST legacy_call_dummy_words[] = CALL_DUMMY; |
| 127 | #else |
| 128 | LONGEST legacy_call_dummy_words[1]; |
| 129 | #endif |
| 130 | int legacy_sizeof_call_dummy_words = sizeof (legacy_call_dummy_words); |
| 131 | |
| 132 | void |
| 133 | generic_remote_translate_xfer_address (CORE_ADDR gdb_addr, int gdb_len, |
| 134 | CORE_ADDR * rem_addr, int *rem_len) |
| 135 | { |
| 136 | *rem_addr = gdb_addr; |
| 137 | *rem_len = gdb_len; |
| 138 | } |
| 139 | |
| 140 | int |
| 141 | generic_prologue_frameless_p (CORE_ADDR ip) |
| 142 | { |
| 143 | #ifdef SKIP_PROLOGUE_FRAMELESS_P |
| 144 | return ip == SKIP_PROLOGUE_FRAMELESS_P (ip); |
| 145 | #else |
| 146 | return ip == SKIP_PROLOGUE (ip); |
| 147 | #endif |
| 148 | } |
| 149 | |
| 150 | |
| 151 | /* Helper functions for INNER_THAN */ |
| 152 | |
| 153 | int |
| 154 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
| 155 | { |
| 156 | return (lhs < rhs); |
| 157 | } |
| 158 | |
| 159 | int |
| 160 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
| 161 | { |
| 162 | return (lhs > rhs); |
| 163 | } |
| 164 | |
| 165 | |
| 166 | /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */ |
| 167 | |
| 168 | const struct floatformat * |
| 169 | default_float_format (struct gdbarch *gdbarch) |
| 170 | { |
| 171 | #if GDB_MULTI_ARCH |
| 172 | int byte_order = gdbarch_byte_order (gdbarch); |
| 173 | #else |
| 174 | int byte_order = TARGET_BYTE_ORDER; |
| 175 | #endif |
| 176 | switch (byte_order) |
| 177 | { |
| 178 | case BIG_ENDIAN: |
| 179 | return &floatformat_ieee_single_big; |
| 180 | case LITTLE_ENDIAN: |
| 181 | return &floatformat_ieee_single_little; |
| 182 | default: |
| 183 | internal_error ("default_float_format: bad byte order"); |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | |
| 188 | const struct floatformat * |
| 189 | default_double_format (struct gdbarch *gdbarch) |
| 190 | { |
| 191 | #if GDB_MULTI_ARCH |
| 192 | int byte_order = gdbarch_byte_order (gdbarch); |
| 193 | #else |
| 194 | int byte_order = TARGET_BYTE_ORDER; |
| 195 | #endif |
| 196 | switch (byte_order) |
| 197 | { |
| 198 | case BIG_ENDIAN: |
| 199 | return &floatformat_ieee_double_big; |
| 200 | case LITTLE_ENDIAN: |
| 201 | return &floatformat_ieee_double_little; |
| 202 | default: |
| 203 | internal_error ("default_double_format: bad byte order"); |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | /* Misc helper functions for targets. */ |
| 208 | |
| 209 | int |
| 210 | frame_num_args_unknown (struct frame_info *fi) |
| 211 | { |
| 212 | return -1; |
| 213 | } |
| 214 | |
| 215 | |
| 216 | int |
| 217 | generic_register_convertible_not (int num) |
| 218 | { |
| 219 | return 0; |
| 220 | } |
| 221 | |
| 222 | |
| 223 | int |
| 224 | default_register_sim_regno (int num) |
| 225 | { |
| 226 | return num; |
| 227 | } |
| 228 | |
| 229 | |
| 230 | CORE_ADDR |
| 231 | default_convert_from_func_ptr_addr (CORE_ADDR addr) |
| 232 | { |
| 233 | return addr; |
| 234 | } |
| 235 | |
| 236 | /* Functions to manipulate the endianness of the target. */ |
| 237 | |
| 238 | #ifdef TARGET_BYTE_ORDER_SELECTABLE |
| 239 | /* compat - Catch old targets that expect a selectable byte-order to |
| 240 | default to BIG_ENDIAN */ |
| 241 | #ifndef TARGET_BYTE_ORDER_DEFAULT |
| 242 | #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN |
| 243 | #endif |
| 244 | #endif |
| 245 | #if !TARGET_BYTE_ORDER_SELECTABLE_P |
| 246 | #ifndef TARGET_BYTE_ORDER_DEFAULT |
| 247 | /* compat - Catch old non byte-order selectable targets that do not |
| 248 | define TARGET_BYTE_ORDER_DEFAULT and instead expect |
| 249 | TARGET_BYTE_ORDER to be used as the default. For targets that |
| 250 | defined neither TARGET_BYTE_ORDER nor TARGET_BYTE_ORDER_DEFAULT the |
| 251 | below will get a strange compiler warning. */ |
| 252 | #define TARGET_BYTE_ORDER_DEFAULT TARGET_BYTE_ORDER |
| 253 | #endif |
| 254 | #endif |
| 255 | #ifndef TARGET_BYTE_ORDER_DEFAULT |
| 256 | #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN /* arbitrary */ |
| 257 | #endif |
| 258 | /* ``target_byte_order'' is only used when non- multi-arch. |
| 259 | Multi-arch targets obtain the current byte order using |
| 260 | TARGET_BYTE_ORDER which is controlled by gdbarch.*. */ |
| 261 | int target_byte_order = TARGET_BYTE_ORDER_DEFAULT; |
| 262 | int target_byte_order_auto = 1; |
| 263 | |
| 264 | static const char endian_big[] = "big"; |
| 265 | static const char endian_little[] = "little"; |
| 266 | static const char endian_auto[] = "auto"; |
| 267 | static const char *endian_enum[] = |
| 268 | { |
| 269 | endian_big, |
| 270 | endian_little, |
| 271 | endian_auto, |
| 272 | NULL, |
| 273 | }; |
| 274 | static const char *set_endian_string; |
| 275 | |
| 276 | /* Called by ``show endian''. */ |
| 277 | |
| 278 | static void |
| 279 | show_endian (char *args, int from_tty) |
| 280 | { |
| 281 | if (TARGET_BYTE_ORDER_AUTO) |
| 282 | printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n", |
| 283 | (TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little")); |
| 284 | else |
| 285 | printf_unfiltered ("The target is assumed to be %s endian\n", |
| 286 | (TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little")); |
| 287 | } |
| 288 | |
| 289 | static void |
| 290 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) |
| 291 | { |
| 292 | if (!TARGET_BYTE_ORDER_SELECTABLE_P) |
| 293 | { |
| 294 | printf_unfiltered ("Byte order is not selectable."); |
| 295 | } |
| 296 | else if (set_endian_string == endian_auto) |
| 297 | { |
| 298 | target_byte_order_auto = 1; |
| 299 | } |
| 300 | else if (set_endian_string == endian_little) |
| 301 | { |
| 302 | target_byte_order_auto = 0; |
| 303 | if (GDB_MULTI_ARCH) |
| 304 | { |
| 305 | struct gdbarch_info info; |
| 306 | memset (&info, 0, sizeof info); |
| 307 | info.byte_order = LITTLE_ENDIAN; |
| 308 | if (! gdbarch_update_p (info)) |
| 309 | { |
| 310 | printf_unfiltered ("Little endian target not supported by GDB\n"); |
| 311 | } |
| 312 | } |
| 313 | else |
| 314 | { |
| 315 | target_byte_order = LITTLE_ENDIAN; |
| 316 | } |
| 317 | } |
| 318 | else if (set_endian_string == endian_big) |
| 319 | { |
| 320 | target_byte_order_auto = 0; |
| 321 | if (GDB_MULTI_ARCH) |
| 322 | { |
| 323 | struct gdbarch_info info; |
| 324 | memset (&info, 0, sizeof info); |
| 325 | info.byte_order = BIG_ENDIAN; |
| 326 | if (! gdbarch_update_p (info)) |
| 327 | { |
| 328 | printf_unfiltered ("Big endian target not supported by GDB\n"); |
| 329 | } |
| 330 | } |
| 331 | else |
| 332 | { |
| 333 | target_byte_order = BIG_ENDIAN; |
| 334 | } |
| 335 | } |
| 336 | else |
| 337 | internal_error ("set_endian: bad value"); |
| 338 | show_endian (NULL, from_tty); |
| 339 | } |
| 340 | |
| 341 | /* Set the endianness from a BFD. */ |
| 342 | |
| 343 | static void |
| 344 | set_endian_from_file (bfd *abfd) |
| 345 | { |
| 346 | if (GDB_MULTI_ARCH) |
| 347 | internal_error ("set_endian_from_file: not for multi-arch"); |
| 348 | if (TARGET_BYTE_ORDER_SELECTABLE_P) |
| 349 | { |
| 350 | int want; |
| 351 | |
| 352 | if (bfd_big_endian (abfd)) |
| 353 | want = BIG_ENDIAN; |
| 354 | else |
| 355 | want = LITTLE_ENDIAN; |
| 356 | if (TARGET_BYTE_ORDER_AUTO) |
| 357 | target_byte_order = want; |
| 358 | else if (TARGET_BYTE_ORDER != want) |
| 359 | warning ("%s endian file does not match %s endian target.", |
| 360 | want == BIG_ENDIAN ? "big" : "little", |
| 361 | TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"); |
| 362 | } |
| 363 | else |
| 364 | { |
| 365 | if (bfd_big_endian (abfd) |
| 366 | ? TARGET_BYTE_ORDER != BIG_ENDIAN |
| 367 | : TARGET_BYTE_ORDER == BIG_ENDIAN) |
| 368 | warning ("%s endian file does not match %s endian target.", |
| 369 | bfd_big_endian (abfd) ? "big" : "little", |
| 370 | TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"); |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | |
| 375 | /* Functions to manipulate the architecture of the target */ |
| 376 | |
| 377 | enum set_arch { set_arch_auto, set_arch_manual }; |
| 378 | |
| 379 | int target_architecture_auto = 1; |
| 380 | |
| 381 | const char *set_architecture_string; |
| 382 | |
| 383 | /* Old way of changing the current architecture. */ |
| 384 | |
| 385 | extern const struct bfd_arch_info bfd_default_arch_struct; |
| 386 | const struct bfd_arch_info *target_architecture = &bfd_default_arch_struct; |
| 387 | int (*target_architecture_hook) (const struct bfd_arch_info *ap); |
| 388 | |
| 389 | static int |
| 390 | arch_ok (const struct bfd_arch_info *arch) |
| 391 | { |
| 392 | if (GDB_MULTI_ARCH) |
| 393 | internal_error ("arch_ok: not multi-arched"); |
| 394 | /* Should be performing the more basic check that the binary is |
| 395 | compatible with GDB. */ |
| 396 | /* Check with the target that the architecture is valid. */ |
| 397 | return (target_architecture_hook == NULL |
| 398 | || target_architecture_hook (arch)); |
| 399 | } |
| 400 | |
| 401 | static void |
| 402 | set_arch (const struct bfd_arch_info *arch, |
| 403 | enum set_arch type) |
| 404 | { |
| 405 | if (GDB_MULTI_ARCH) |
| 406 | internal_error ("set_arch: not multi-arched"); |
| 407 | switch (type) |
| 408 | { |
| 409 | case set_arch_auto: |
| 410 | if (!arch_ok (arch)) |
| 411 | warning ("Target may not support %s architecture", |
| 412 | arch->printable_name); |
| 413 | target_architecture = arch; |
| 414 | break; |
| 415 | case set_arch_manual: |
| 416 | if (!arch_ok (arch)) |
| 417 | { |
| 418 | printf_unfiltered ("Target does not support `%s' architecture.\n", |
| 419 | arch->printable_name); |
| 420 | } |
| 421 | else |
| 422 | { |
| 423 | target_architecture_auto = 0; |
| 424 | target_architecture = arch; |
| 425 | } |
| 426 | break; |
| 427 | } |
| 428 | if (gdbarch_debug) |
| 429 | gdbarch_dump (current_gdbarch, gdb_stdlog); |
| 430 | } |
| 431 | |
| 432 | /* Set the architecture from arch/machine (deprecated) */ |
| 433 | |
| 434 | void |
| 435 | set_architecture_from_arch_mach (enum bfd_architecture arch, |
| 436 | unsigned long mach) |
| 437 | { |
| 438 | const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach); |
| 439 | if (GDB_MULTI_ARCH) |
| 440 | internal_error ("set_architecture_from_arch_mach: not multi-arched"); |
| 441 | if (wanted != NULL) |
| 442 | set_arch (wanted, set_arch_manual); |
| 443 | else |
| 444 | internal_error ("gdbarch: hardwired architecture/machine not recognized"); |
| 445 | } |
| 446 | |
| 447 | /* Set the architecture from a BFD (deprecated) */ |
| 448 | |
| 449 | static void |
| 450 | set_architecture_from_file (bfd *abfd) |
| 451 | { |
| 452 | const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd); |
| 453 | if (GDB_MULTI_ARCH) |
| 454 | internal_error ("set_architecture_from_file: not multi-arched"); |
| 455 | if (target_architecture_auto) |
| 456 | { |
| 457 | set_arch (wanted, set_arch_auto); |
| 458 | } |
| 459 | else if (wanted != target_architecture) |
| 460 | { |
| 461 | warning ("%s architecture file may be incompatible with %s target.", |
| 462 | wanted->printable_name, |
| 463 | target_architecture->printable_name); |
| 464 | } |
| 465 | } |
| 466 | |
| 467 | |
| 468 | /* Called if the user enters ``show architecture'' without an |
| 469 | argument. */ |
| 470 | |
| 471 | static void |
| 472 | show_architecture (char *args, int from_tty) |
| 473 | { |
| 474 | const char *arch; |
| 475 | arch = TARGET_ARCHITECTURE->printable_name; |
| 476 | if (target_architecture_auto) |
| 477 | printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); |
| 478 | else |
| 479 | printf_filtered ("The target architecture is assumed to be %s\n", arch); |
| 480 | } |
| 481 | |
| 482 | |
| 483 | /* Called if the user enters ``set architecture'' with or without an |
| 484 | argument. */ |
| 485 | |
| 486 | static void |
| 487 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) |
| 488 | { |
| 489 | if (strcmp (set_architecture_string, "auto") == 0) |
| 490 | { |
| 491 | target_architecture_auto = 1; |
| 492 | } |
| 493 | else if (GDB_MULTI_ARCH) |
| 494 | { |
| 495 | struct gdbarch_info info; |
| 496 | memset (&info, 0, sizeof info); |
| 497 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
| 498 | if (info.bfd_arch_info == NULL) |
| 499 | internal_error ("set_architecture: bfd_scan_arch failed"); |
| 500 | if (gdbarch_update_p (info)) |
| 501 | target_architecture_auto = 0; |
| 502 | else |
| 503 | printf_unfiltered ("Architecture `%s' not recognized.\n", |
| 504 | set_architecture_string); |
| 505 | } |
| 506 | else |
| 507 | { |
| 508 | const struct bfd_arch_info *arch |
| 509 | = bfd_scan_arch (set_architecture_string); |
| 510 | if (arch == NULL) |
| 511 | internal_error ("set_architecture: bfd_scan_arch failed"); |
| 512 | set_arch (arch, set_arch_manual); |
| 513 | } |
| 514 | show_architecture (NULL, from_tty); |
| 515 | } |
| 516 | |
| 517 | /* Called if the user enters ``info architecture'' without an argument. */ |
| 518 | |
| 519 | static void |
| 520 | info_architecture (char *args, int from_tty) |
| 521 | { |
| 522 | printf_filtered ("Available architectures are:\n"); |
| 523 | if (GDB_MULTI_ARCH) |
| 524 | { |
| 525 | const char **arches = gdbarch_printable_names (); |
| 526 | const char **arch; |
| 527 | for (arch = arches; *arch != NULL; arch++) |
| 528 | { |
| 529 | printf_filtered (" %s", *arch); |
| 530 | } |
| 531 | free (arches); |
| 532 | } |
| 533 | else |
| 534 | { |
| 535 | enum bfd_architecture a; |
| 536 | for (a = bfd_arch_obscure + 1; a < bfd_arch_last; a++) |
| 537 | { |
| 538 | const struct bfd_arch_info *ap; |
| 539 | for (ap = bfd_lookup_arch (a, 0); |
| 540 | ap != NULL; |
| 541 | ap = ap->next) |
| 542 | { |
| 543 | printf_filtered (" %s", ap->printable_name); |
| 544 | ap = ap->next; |
| 545 | } |
| 546 | } |
| 547 | } |
| 548 | printf_filtered ("\n"); |
| 549 | } |
| 550 | |
| 551 | /* Set the dynamic target-system-dependent parameters (architecture, |
| 552 | byte-order) using information found in the BFD */ |
| 553 | |
| 554 | void |
| 555 | set_gdbarch_from_file (bfd *abfd) |
| 556 | { |
| 557 | if (GDB_MULTI_ARCH) |
| 558 | { |
| 559 | struct gdbarch_info info; |
| 560 | memset (&info, 0, sizeof info); |
| 561 | info.abfd = abfd; |
| 562 | if (! gdbarch_update_p (info)) |
| 563 | error ("Architecture of file not recognized.\n"); |
| 564 | } |
| 565 | else |
| 566 | { |
| 567 | set_architecture_from_file (abfd); |
| 568 | set_endian_from_file (abfd); |
| 569 | } |
| 570 | } |
| 571 | |
| 572 | /* Initialize the current architecture. Update the ``set |
| 573 | architecture'' command so that it specifies a list of valid |
| 574 | architectures. */ |
| 575 | |
| 576 | #ifdef DEFAULT_BFD_ARCH |
| 577 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; |
| 578 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; |
| 579 | #else |
| 580 | static const bfd_arch_info_type *default_bfd_arch; |
| 581 | #endif |
| 582 | |
| 583 | #ifdef DEFAULT_BFD_VEC |
| 584 | extern const bfd_target DEFAULT_BFD_VEC; |
| 585 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; |
| 586 | #else |
| 587 | static const bfd_target *default_bfd_vec; |
| 588 | #endif |
| 589 | |
| 590 | void |
| 591 | initialize_current_architecture (void) |
| 592 | { |
| 593 | const char **arches = gdbarch_printable_names (); |
| 594 | |
| 595 | /* determine a default architecture and byte order. */ |
| 596 | struct gdbarch_info info; |
| 597 | memset (&info, 0, sizeof (info)); |
| 598 | |
| 599 | /* Find a default architecture. */ |
| 600 | if (info.bfd_arch_info == NULL |
| 601 | && default_bfd_arch != NULL) |
| 602 | info.bfd_arch_info = default_bfd_arch; |
| 603 | if (info.bfd_arch_info == NULL) |
| 604 | { |
| 605 | /* Choose the architecture by taking the first one |
| 606 | alphabetically. */ |
| 607 | const char *chosen = arches[0]; |
| 608 | const char **arch; |
| 609 | for (arch = arches; *arch != NULL; arch++) |
| 610 | { |
| 611 | if (strcmp (*arch, chosen) < 0) |
| 612 | chosen = *arch; |
| 613 | } |
| 614 | if (chosen == NULL) |
| 615 | internal_error ("initialize_current_architecture: No arch"); |
| 616 | info.bfd_arch_info = bfd_scan_arch (chosen); |
| 617 | if (info.bfd_arch_info == NULL) |
| 618 | internal_error ("initialize_current_architecture: Arch not found"); |
| 619 | } |
| 620 | |
| 621 | /* take several guesses at a byte order. */ |
| 622 | /* NB: can't use TARGET_BYTE_ORDER_DEFAULT as its definition is |
| 623 | forced above. */ |
| 624 | if (info.byte_order == 0 |
| 625 | && default_bfd_vec != NULL) |
| 626 | { |
| 627 | /* Extract BFD's default vector's byte order. */ |
| 628 | switch (default_bfd_vec->byteorder) |
| 629 | { |
| 630 | case BFD_ENDIAN_BIG: |
| 631 | info.byte_order = BIG_ENDIAN; |
| 632 | break; |
| 633 | case BFD_ENDIAN_LITTLE: |
| 634 | info.byte_order = LITTLE_ENDIAN; |
| 635 | break; |
| 636 | default: |
| 637 | break; |
| 638 | } |
| 639 | } |
| 640 | if (info.byte_order == 0) |
| 641 | { |
| 642 | /* look for ``*el-*'' in the target name. */ |
| 643 | const char *chp; |
| 644 | chp = strchr (target_name, '-'); |
| 645 | if (chp != NULL |
| 646 | && chp - 2 >= target_name |
| 647 | && strncmp (chp - 2, "el", 2) == 0) |
| 648 | info.byte_order = LITTLE_ENDIAN; |
| 649 | } |
| 650 | if (info.byte_order == 0) |
| 651 | { |
| 652 | /* Wire it to big-endian!!! */ |
| 653 | info.byte_order = BIG_ENDIAN; |
| 654 | } |
| 655 | |
| 656 | if (GDB_MULTI_ARCH) |
| 657 | { |
| 658 | if (! gdbarch_update_p (info)) |
| 659 | { |
| 660 | internal_error ("initialize_current_architecture: Selection of initial architecture failed"); |
| 661 | } |
| 662 | } |
| 663 | |
| 664 | /* Create the ``set architecture'' command appending ``auto'' to the |
| 665 | list of architectures. */ |
| 666 | { |
| 667 | struct cmd_list_element *c; |
| 668 | /* Append ``auto''. */ |
| 669 | int nr; |
| 670 | for (nr = 0; arches[nr] != NULL; nr++); |
| 671 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); |
| 672 | arches[nr + 0] = "auto"; |
| 673 | arches[nr + 1] = NULL; |
| 674 | /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead |
| 675 | of ``const char *''. We just happen to know that the casts are |
| 676 | safe. */ |
| 677 | c = add_set_enum_cmd ("architecture", class_support, |
| 678 | arches, &set_architecture_string, |
| 679 | "Set architecture of target.", |
| 680 | &setlist); |
| 681 | c->function.sfunc = set_architecture; |
| 682 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
| 683 | /* Don't use set_from_show - need to print both auto/manual and |
| 684 | current setting. */ |
| 685 | add_cmd ("architecture", class_support, show_architecture, |
| 686 | "Show the current target architecture", &showlist); |
| 687 | c = add_cmd ("architecture", class_support, info_architecture, |
| 688 | "List supported target architectures", &infolist); |
| 689 | deprecate_cmd (c, "set architecture"); |
| 690 | } |
| 691 | } |
| 692 | |
| 693 | |
| 694 | /* */ |
| 695 | |
| 696 | extern initialize_file_ftype _initialize_gdbarch_utils; |
| 697 | |
| 698 | void |
| 699 | _initialize_gdbarch_utils (void) |
| 700 | { |
| 701 | struct cmd_list_element *c; |
| 702 | c = add_set_enum_cmd ("endian", class_support, |
| 703 | endian_enum, &set_endian_string, |
| 704 | "Set endianness of target.", |
| 705 | &setlist); |
| 706 | c->function.sfunc = set_endian; |
| 707 | /* Don't use set_from_show - need to print both auto/manual and |
| 708 | current setting. */ |
| 709 | add_cmd ("endian", class_support, show_endian, |
| 710 | "Show the current byte-order", &showlist); |
| 711 | } |