| 1 | /* Dynamic architecture support for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, |
| 4 | Inc. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 21 | Boston, MA 02111-1307, USA. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | |
| 25 | #if GDB_MULTI_ARCH |
| 26 | #include "arch-utils.h" |
| 27 | #include "gdbcmd.h" |
| 28 | #include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */ |
| 29 | #else |
| 30 | /* Just include everything in sight so that the every old definition |
| 31 | of macro is visible. */ |
| 32 | #include "symtab.h" |
| 33 | #include "frame.h" |
| 34 | #include "inferior.h" |
| 35 | #include "breakpoint.h" |
| 36 | #include "gdb_wait.h" |
| 37 | #include "gdbcore.h" |
| 38 | #include "gdbcmd.h" |
| 39 | #include "target.h" |
| 40 | #include "annotate.h" |
| 41 | #endif |
| 42 | #include "gdb_string.h" |
| 43 | #include "regcache.h" |
| 44 | #include "gdb_assert.h" |
| 45 | #include "sim-regno.h" |
| 46 | |
| 47 | #include "version.h" |
| 48 | |
| 49 | #include "floatformat.h" |
| 50 | |
| 51 | /* Use the program counter to determine the contents and size |
| 52 | of a breakpoint instruction. If no target-dependent macro |
| 53 | BREAKPOINT_FROM_PC has been defined to implement this function, |
| 54 | assume that the breakpoint doesn't depend on the PC, and |
| 55 | use the values of the BIG_BREAKPOINT and LITTLE_BREAKPOINT macros. |
| 56 | Return a pointer to a string of bytes that encode a breakpoint |
| 57 | instruction, stores the length of the string to *lenptr, |
| 58 | and optionally adjust the pc to point to the correct memory location |
| 59 | for inserting the breakpoint. */ |
| 60 | |
| 61 | const unsigned char * |
| 62 | legacy_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr) |
| 63 | { |
| 64 | /* {BIG_,LITTLE_}BREAKPOINT is the sequence of bytes we insert for a |
| 65 | breakpoint. On some machines, breakpoints are handled by the |
| 66 | target environment and we don't have to worry about them here. */ |
| 67 | #ifdef BIG_BREAKPOINT |
| 68 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
| 69 | { |
| 70 | static unsigned char big_break_insn[] = BIG_BREAKPOINT; |
| 71 | *lenptr = sizeof (big_break_insn); |
| 72 | return big_break_insn; |
| 73 | } |
| 74 | #endif |
| 75 | #ifdef LITTLE_BREAKPOINT |
| 76 | if (TARGET_BYTE_ORDER != BFD_ENDIAN_BIG) |
| 77 | { |
| 78 | static unsigned char little_break_insn[] = LITTLE_BREAKPOINT; |
| 79 | *lenptr = sizeof (little_break_insn); |
| 80 | return little_break_insn; |
| 81 | } |
| 82 | #endif |
| 83 | #ifdef BREAKPOINT |
| 84 | { |
| 85 | static unsigned char break_insn[] = BREAKPOINT; |
| 86 | *lenptr = sizeof (break_insn); |
| 87 | return break_insn; |
| 88 | } |
| 89 | #endif |
| 90 | *lenptr = 0; |
| 91 | return NULL; |
| 92 | } |
| 93 | |
| 94 | /* Implementation of extract return value that grubs around in the |
| 95 | register cache. */ |
| 96 | void |
| 97 | legacy_extract_return_value (struct type *type, struct regcache *regcache, |
| 98 | void *valbuf) |
| 99 | { |
| 100 | char *registers = deprecated_grub_regcache_for_registers (regcache); |
| 101 | bfd_byte *buf = valbuf; |
| 102 | DEPRECATED_EXTRACT_RETURN_VALUE (type, registers, buf); /* OK */ |
| 103 | } |
| 104 | |
| 105 | /* Implementation of store return value that grubs the register cache. |
| 106 | Takes a local copy of the buffer to avoid const problems. */ |
| 107 | void |
| 108 | legacy_store_return_value (struct type *type, struct regcache *regcache, |
| 109 | const void *buf) |
| 110 | { |
| 111 | bfd_byte *b = alloca (TYPE_LENGTH (type)); |
| 112 | gdb_assert (regcache == current_regcache); |
| 113 | memcpy (b, buf, TYPE_LENGTH (type)); |
| 114 | DEPRECATED_STORE_RETURN_VALUE (type, b); |
| 115 | } |
| 116 | |
| 117 | |
| 118 | int |
| 119 | legacy_register_sim_regno (int regnum) |
| 120 | { |
| 121 | /* Only makes sense to supply raw registers. */ |
| 122 | gdb_assert (regnum >= 0 && regnum < NUM_REGS); |
| 123 | /* NOTE: cagney/2002-05-13: The old code did it this way and it is |
| 124 | suspected that some GDB/SIM combinations may rely on this |
| 125 | behavour. The default should be one2one_register_sim_regno |
| 126 | (below). */ |
| 127 | if (REGISTER_NAME (regnum) != NULL |
| 128 | && REGISTER_NAME (regnum)[0] != '\0') |
| 129 | return regnum; |
| 130 | else |
| 131 | return LEGACY_SIM_REGNO_IGNORE; |
| 132 | } |
| 133 | |
| 134 | int |
| 135 | generic_frameless_function_invocation_not (struct frame_info *fi) |
| 136 | { |
| 137 | return 0; |
| 138 | } |
| 139 | |
| 140 | int |
| 141 | generic_return_value_on_stack_not (struct type *type) |
| 142 | { |
| 143 | return 0; |
| 144 | } |
| 145 | |
| 146 | CORE_ADDR |
| 147 | generic_skip_trampoline_code (CORE_ADDR pc) |
| 148 | { |
| 149 | return 0; |
| 150 | } |
| 151 | |
| 152 | int |
| 153 | generic_in_solib_call_trampoline (CORE_ADDR pc, char *name) |
| 154 | { |
| 155 | return 0; |
| 156 | } |
| 157 | |
| 158 | int |
| 159 | generic_in_solib_return_trampoline (CORE_ADDR pc, char *name) |
| 160 | { |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | int |
| 165 | generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) |
| 166 | { |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | const char * |
| 171 | legacy_register_name (int i) |
| 172 | { |
| 173 | #ifdef REGISTER_NAMES |
| 174 | static char *names[] = REGISTER_NAMES; |
| 175 | if (i < 0 || i >= (sizeof (names) / sizeof (*names))) |
| 176 | return NULL; |
| 177 | else |
| 178 | return names[i]; |
| 179 | #else |
| 180 | internal_error (__FILE__, __LINE__, |
| 181 | "legacy_register_name: called."); |
| 182 | return NULL; |
| 183 | #endif |
| 184 | } |
| 185 | |
| 186 | #if defined (CALL_DUMMY) |
| 187 | LONGEST legacy_call_dummy_words[] = CALL_DUMMY; |
| 188 | #else |
| 189 | LONGEST legacy_call_dummy_words[1]; |
| 190 | #endif |
| 191 | int legacy_sizeof_call_dummy_words = sizeof (legacy_call_dummy_words); |
| 192 | |
| 193 | void |
| 194 | generic_remote_translate_xfer_address (CORE_ADDR gdb_addr, int gdb_len, |
| 195 | CORE_ADDR * rem_addr, int *rem_len) |
| 196 | { |
| 197 | *rem_addr = gdb_addr; |
| 198 | *rem_len = gdb_len; |
| 199 | } |
| 200 | |
| 201 | int |
| 202 | generic_prologue_frameless_p (CORE_ADDR ip) |
| 203 | { |
| 204 | return ip == SKIP_PROLOGUE (ip); |
| 205 | } |
| 206 | |
| 207 | /* New/multi-arched targets should use the correct gdbarch field |
| 208 | instead of using this global pointer. */ |
| 209 | int |
| 210 | legacy_print_insn (bfd_vma vma, disassemble_info *info) |
| 211 | { |
| 212 | return (*tm_print_insn) (vma, info); |
| 213 | } |
| 214 | |
| 215 | /* Helper functions for INNER_THAN */ |
| 216 | |
| 217 | int |
| 218 | core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs) |
| 219 | { |
| 220 | return (lhs < rhs); |
| 221 | } |
| 222 | |
| 223 | int |
| 224 | core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs) |
| 225 | { |
| 226 | return (lhs > rhs); |
| 227 | } |
| 228 | |
| 229 | |
| 230 | /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */ |
| 231 | |
| 232 | const struct floatformat * |
| 233 | default_float_format (struct gdbarch *gdbarch) |
| 234 | { |
| 235 | #if GDB_MULTI_ARCH |
| 236 | int byte_order = gdbarch_byte_order (gdbarch); |
| 237 | #else |
| 238 | int byte_order = TARGET_BYTE_ORDER; |
| 239 | #endif |
| 240 | switch (byte_order) |
| 241 | { |
| 242 | case BFD_ENDIAN_BIG: |
| 243 | return &floatformat_ieee_single_big; |
| 244 | case BFD_ENDIAN_LITTLE: |
| 245 | return &floatformat_ieee_single_little; |
| 246 | default: |
| 247 | internal_error (__FILE__, __LINE__, |
| 248 | "default_float_format: bad byte order"); |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | |
| 253 | const struct floatformat * |
| 254 | default_double_format (struct gdbarch *gdbarch) |
| 255 | { |
| 256 | #if GDB_MULTI_ARCH |
| 257 | int byte_order = gdbarch_byte_order (gdbarch); |
| 258 | #else |
| 259 | int byte_order = TARGET_BYTE_ORDER; |
| 260 | #endif |
| 261 | switch (byte_order) |
| 262 | { |
| 263 | case BFD_ENDIAN_BIG: |
| 264 | return &floatformat_ieee_double_big; |
| 265 | case BFD_ENDIAN_LITTLE: |
| 266 | return &floatformat_ieee_double_little; |
| 267 | default: |
| 268 | internal_error (__FILE__, __LINE__, |
| 269 | "default_double_format: bad byte order"); |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | /* Misc helper functions for targets. */ |
| 274 | |
| 275 | int |
| 276 | frame_num_args_unknown (struct frame_info *fi) |
| 277 | { |
| 278 | return -1; |
| 279 | } |
| 280 | |
| 281 | |
| 282 | int |
| 283 | generic_register_convertible_not (int num) |
| 284 | { |
| 285 | return 0; |
| 286 | } |
| 287 | |
| 288 | |
| 289 | /* Under some ABI's that specify the `struct convention' for returning |
| 290 | structures by value, by the time we've returned from the function, |
| 291 | the return value is sitting there in the caller's buffer, but GDB |
| 292 | has no way to find the address of that buffer. |
| 293 | |
| 294 | On such architectures, use this function as your |
| 295 | extract_struct_value_address method. When asked to a struct |
| 296 | returned by value in this fashion, GDB will print a nice error |
| 297 | message, instead of garbage. */ |
| 298 | CORE_ADDR |
| 299 | generic_cannot_extract_struct_value_address (char *dummy) |
| 300 | { |
| 301 | return 0; |
| 302 | } |
| 303 | |
| 304 | CORE_ADDR |
| 305 | core_addr_identity (CORE_ADDR addr) |
| 306 | { |
| 307 | return addr; |
| 308 | } |
| 309 | |
| 310 | int |
| 311 | no_op_reg_to_regnum (int reg) |
| 312 | { |
| 313 | return reg; |
| 314 | } |
| 315 | |
| 316 | /* Default prepare_to_procced(). */ |
| 317 | int |
| 318 | default_prepare_to_proceed (int select_it) |
| 319 | { |
| 320 | return 0; |
| 321 | } |
| 322 | |
| 323 | /* Generic prepare_to_proceed(). This one should be suitable for most |
| 324 | targets that support threads. */ |
| 325 | int |
| 326 | generic_prepare_to_proceed (int select_it) |
| 327 | { |
| 328 | ptid_t wait_ptid; |
| 329 | struct target_waitstatus wait_status; |
| 330 | |
| 331 | /* Get the last target status returned by target_wait(). */ |
| 332 | get_last_target_status (&wait_ptid, &wait_status); |
| 333 | |
| 334 | /* Make sure we were stopped either at a breakpoint, or because |
| 335 | of a Ctrl-C. */ |
| 336 | if (wait_status.kind != TARGET_WAITKIND_STOPPED |
| 337 | || (wait_status.value.sig != TARGET_SIGNAL_TRAP && |
| 338 | wait_status.value.sig != TARGET_SIGNAL_INT)) |
| 339 | { |
| 340 | return 0; |
| 341 | } |
| 342 | |
| 343 | if (!ptid_equal (wait_ptid, minus_one_ptid) |
| 344 | && !ptid_equal (inferior_ptid, wait_ptid)) |
| 345 | { |
| 346 | /* Switched over from WAIT_PID. */ |
| 347 | CORE_ADDR wait_pc = read_pc_pid (wait_ptid); |
| 348 | |
| 349 | if (wait_pc != read_pc ()) |
| 350 | { |
| 351 | if (select_it) |
| 352 | { |
| 353 | /* Switch back to WAIT_PID thread. */ |
| 354 | inferior_ptid = wait_ptid; |
| 355 | |
| 356 | /* FIXME: This stuff came from switch_to_thread() in |
| 357 | thread.c (which should probably be a public function). */ |
| 358 | flush_cached_frames (); |
| 359 | registers_changed (); |
| 360 | stop_pc = wait_pc; |
| 361 | select_frame (get_current_frame ()); |
| 362 | } |
| 363 | /* We return 1 to indicate that there is a breakpoint here, |
| 364 | so we need to step over it before continuing to avoid |
| 365 | hitting it straight away. */ |
| 366 | if (breakpoint_here_p (wait_pc)) |
| 367 | { |
| 368 | return 1; |
| 369 | } |
| 370 | } |
| 371 | } |
| 372 | return 0; |
| 373 | |
| 374 | } |
| 375 | |
| 376 | CORE_ADDR |
| 377 | init_frame_pc_noop (int fromleaf, struct frame_info *prev) |
| 378 | { |
| 379 | /* Do nothing, implies return the same PC value. */ |
| 380 | return get_frame_pc (prev); |
| 381 | } |
| 382 | |
| 383 | CORE_ADDR |
| 384 | init_frame_pc_default (int fromleaf, struct frame_info *prev) |
| 385 | { |
| 386 | if (fromleaf) |
| 387 | return SAVED_PC_AFTER_CALL (get_next_frame (prev)); |
| 388 | else if (get_next_frame (prev) != NULL) |
| 389 | return FRAME_SAVED_PC (get_next_frame (prev)); |
| 390 | else |
| 391 | return read_pc (); |
| 392 | } |
| 393 | |
| 394 | void |
| 395 | default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym) |
| 396 | { |
| 397 | return; |
| 398 | } |
| 399 | |
| 400 | void |
| 401 | default_coff_make_msymbol_special (int val, struct minimal_symbol *msym) |
| 402 | { |
| 403 | return; |
| 404 | } |
| 405 | |
| 406 | int |
| 407 | cannot_register_not (int regnum) |
| 408 | { |
| 409 | return 0; |
| 410 | } |
| 411 | |
| 412 | /* Legacy version of target_virtual_frame_pointer(). Assumes that |
| 413 | there is an FP_REGNUM and that it is the same, cooked or raw. */ |
| 414 | |
| 415 | void |
| 416 | legacy_virtual_frame_pointer (CORE_ADDR pc, |
| 417 | int *frame_regnum, |
| 418 | LONGEST *frame_offset) |
| 419 | { |
| 420 | /* FIXME: cagney/2002-09-13: This code is used when identifying the |
| 421 | frame pointer of the current PC. It is assuming that a single |
| 422 | register and an offset can determine this. I think it should |
| 423 | instead generate a byte code expression as that would work better |
| 424 | with things like Dwarf2's CFI. */ |
| 425 | if (FP_REGNUM >= 0 && FP_REGNUM < NUM_REGS) |
| 426 | *frame_regnum = FP_REGNUM; |
| 427 | else if (SP_REGNUM >= 0 && SP_REGNUM < NUM_REGS) |
| 428 | *frame_regnum = SP_REGNUM; |
| 429 | else |
| 430 | /* Should this be an internal error? I guess so, it is reflecting |
| 431 | an architectural limitation in the current design. */ |
| 432 | internal_error (__FILE__, __LINE__, "No virtual frame pointer available"); |
| 433 | *frame_offset = 0; |
| 434 | } |
| 435 | |
| 436 | /* Assume the world is sane, every register's virtual and real size |
| 437 | is identical. */ |
| 438 | |
| 439 | int |
| 440 | generic_register_size (int regnum) |
| 441 | { |
| 442 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); |
| 443 | return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (regnum)); |
| 444 | } |
| 445 | |
| 446 | /* Assume all registers are adjacent. */ |
| 447 | |
| 448 | int |
| 449 | generic_register_byte (int regnum) |
| 450 | { |
| 451 | int byte; |
| 452 | int i; |
| 453 | gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS); |
| 454 | byte = 0; |
| 455 | for (i = 0; i < regnum; i++) |
| 456 | { |
| 457 | byte += TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (i)); |
| 458 | } |
| 459 | return byte; |
| 460 | } |
| 461 | |
| 462 | \f |
| 463 | int |
| 464 | legacy_pc_in_sigtramp (CORE_ADDR pc, char *name) |
| 465 | { |
| 466 | #if !defined (IN_SIGTRAMP) |
| 467 | if (SIGTRAMP_START_P ()) |
| 468 | return (pc) >= SIGTRAMP_START (pc) && (pc) < SIGTRAMP_END (pc); |
| 469 | else |
| 470 | return name && strcmp ("_sigtramp", name) == 0; |
| 471 | #else |
| 472 | return IN_SIGTRAMP (pc, name); |
| 473 | #endif |
| 474 | } |
| 475 | |
| 476 | int |
| 477 | legacy_convert_register_p (int regnum) |
| 478 | { |
| 479 | return REGISTER_CONVERTIBLE (regnum); |
| 480 | } |
| 481 | |
| 482 | void |
| 483 | legacy_register_to_value (int regnum, struct type *type, |
| 484 | char *from, char *to) |
| 485 | { |
| 486 | REGISTER_CONVERT_TO_VIRTUAL (regnum, type, from, to); |
| 487 | } |
| 488 | |
| 489 | void |
| 490 | legacy_value_to_register (struct type *type, int regnum, |
| 491 | char *from, char *to) |
| 492 | { |
| 493 | REGISTER_CONVERT_TO_RAW (type, regnum, from, to); |
| 494 | } |
| 495 | |
| 496 | \f |
| 497 | /* Functions to manipulate the endianness of the target. */ |
| 498 | |
| 499 | /* ``target_byte_order'' is only used when non- multi-arch. |
| 500 | Multi-arch targets obtain the current byte order using the |
| 501 | TARGET_BYTE_ORDER gdbarch method. |
| 502 | |
| 503 | The choice of initial value is entirely arbitrary. During startup, |
| 504 | the function initialize_current_architecture() updates this value |
| 505 | based on default byte-order information extracted from BFD. */ |
| 506 | int target_byte_order = BFD_ENDIAN_BIG; |
| 507 | int target_byte_order_auto = 1; |
| 508 | |
| 509 | static const char endian_big[] = "big"; |
| 510 | static const char endian_little[] = "little"; |
| 511 | static const char endian_auto[] = "auto"; |
| 512 | static const char *endian_enum[] = |
| 513 | { |
| 514 | endian_big, |
| 515 | endian_little, |
| 516 | endian_auto, |
| 517 | NULL, |
| 518 | }; |
| 519 | static const char *set_endian_string; |
| 520 | |
| 521 | /* Called by ``show endian''. */ |
| 522 | |
| 523 | static void |
| 524 | show_endian (char *args, int from_tty) |
| 525 | { |
| 526 | if (TARGET_BYTE_ORDER_AUTO) |
| 527 | printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n", |
| 528 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
| 529 | else |
| 530 | printf_unfiltered ("The target is assumed to be %s endian\n", |
| 531 | (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little")); |
| 532 | } |
| 533 | |
| 534 | static void |
| 535 | set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c) |
| 536 | { |
| 537 | if (set_endian_string == endian_auto) |
| 538 | { |
| 539 | target_byte_order_auto = 1; |
| 540 | } |
| 541 | else if (set_endian_string == endian_little) |
| 542 | { |
| 543 | target_byte_order_auto = 0; |
| 544 | if (GDB_MULTI_ARCH) |
| 545 | { |
| 546 | struct gdbarch_info info; |
| 547 | gdbarch_info_init (&info); |
| 548 | info.byte_order = BFD_ENDIAN_LITTLE; |
| 549 | if (! gdbarch_update_p (info)) |
| 550 | { |
| 551 | printf_unfiltered ("Little endian target not supported by GDB\n"); |
| 552 | } |
| 553 | } |
| 554 | else |
| 555 | { |
| 556 | target_byte_order = BFD_ENDIAN_LITTLE; |
| 557 | } |
| 558 | } |
| 559 | else if (set_endian_string == endian_big) |
| 560 | { |
| 561 | target_byte_order_auto = 0; |
| 562 | if (GDB_MULTI_ARCH) |
| 563 | { |
| 564 | struct gdbarch_info info; |
| 565 | gdbarch_info_init (&info); |
| 566 | info.byte_order = BFD_ENDIAN_BIG; |
| 567 | if (! gdbarch_update_p (info)) |
| 568 | { |
| 569 | printf_unfiltered ("Big endian target not supported by GDB\n"); |
| 570 | } |
| 571 | } |
| 572 | else |
| 573 | { |
| 574 | target_byte_order = BFD_ENDIAN_BIG; |
| 575 | } |
| 576 | } |
| 577 | else |
| 578 | internal_error (__FILE__, __LINE__, |
| 579 | "set_endian: bad value"); |
| 580 | show_endian (NULL, from_tty); |
| 581 | } |
| 582 | |
| 583 | /* Set the endianness from a BFD. */ |
| 584 | |
| 585 | static void |
| 586 | set_endian_from_file (bfd *abfd) |
| 587 | { |
| 588 | int want; |
| 589 | if (GDB_MULTI_ARCH) |
| 590 | internal_error (__FILE__, __LINE__, |
| 591 | "set_endian_from_file: not for multi-arch"); |
| 592 | if (bfd_big_endian (abfd)) |
| 593 | want = BFD_ENDIAN_BIG; |
| 594 | else |
| 595 | want = BFD_ENDIAN_LITTLE; |
| 596 | if (TARGET_BYTE_ORDER_AUTO) |
| 597 | target_byte_order = want; |
| 598 | else if (TARGET_BYTE_ORDER != want) |
| 599 | warning ("%s endian file does not match %s endian target.", |
| 600 | want == BFD_ENDIAN_BIG ? "big" : "little", |
| 601 | TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? "big" : "little"); |
| 602 | } |
| 603 | |
| 604 | |
| 605 | /* Functions to manipulate the architecture of the target */ |
| 606 | |
| 607 | enum set_arch { set_arch_auto, set_arch_manual }; |
| 608 | |
| 609 | int target_architecture_auto = 1; |
| 610 | |
| 611 | const char *set_architecture_string; |
| 612 | |
| 613 | /* Old way of changing the current architecture. */ |
| 614 | |
| 615 | extern const struct bfd_arch_info bfd_default_arch_struct; |
| 616 | const struct bfd_arch_info *target_architecture = &bfd_default_arch_struct; |
| 617 | int (*target_architecture_hook) (const struct bfd_arch_info *ap); |
| 618 | |
| 619 | static int |
| 620 | arch_ok (const struct bfd_arch_info *arch) |
| 621 | { |
| 622 | if (GDB_MULTI_ARCH) |
| 623 | internal_error (__FILE__, __LINE__, |
| 624 | "arch_ok: not multi-arched"); |
| 625 | /* Should be performing the more basic check that the binary is |
| 626 | compatible with GDB. */ |
| 627 | /* Check with the target that the architecture is valid. */ |
| 628 | return (target_architecture_hook == NULL |
| 629 | || target_architecture_hook (arch)); |
| 630 | } |
| 631 | |
| 632 | static void |
| 633 | set_arch (const struct bfd_arch_info *arch, |
| 634 | enum set_arch type) |
| 635 | { |
| 636 | if (GDB_MULTI_ARCH) |
| 637 | internal_error (__FILE__, __LINE__, |
| 638 | "set_arch: not multi-arched"); |
| 639 | switch (type) |
| 640 | { |
| 641 | case set_arch_auto: |
| 642 | if (!arch_ok (arch)) |
| 643 | warning ("Target may not support %s architecture", |
| 644 | arch->printable_name); |
| 645 | target_architecture = arch; |
| 646 | break; |
| 647 | case set_arch_manual: |
| 648 | if (!arch_ok (arch)) |
| 649 | { |
| 650 | printf_unfiltered ("Target does not support `%s' architecture.\n", |
| 651 | arch->printable_name); |
| 652 | } |
| 653 | else |
| 654 | { |
| 655 | target_architecture_auto = 0; |
| 656 | target_architecture = arch; |
| 657 | } |
| 658 | break; |
| 659 | } |
| 660 | if (gdbarch_debug) |
| 661 | gdbarch_dump (current_gdbarch, gdb_stdlog); |
| 662 | } |
| 663 | |
| 664 | /* Set the architecture from arch/machine (deprecated) */ |
| 665 | |
| 666 | void |
| 667 | set_architecture_from_arch_mach (enum bfd_architecture arch, |
| 668 | unsigned long mach) |
| 669 | { |
| 670 | const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach); |
| 671 | if (GDB_MULTI_ARCH) |
| 672 | internal_error (__FILE__, __LINE__, |
| 673 | "set_architecture_from_arch_mach: not multi-arched"); |
| 674 | if (wanted != NULL) |
| 675 | set_arch (wanted, set_arch_manual); |
| 676 | else |
| 677 | internal_error (__FILE__, __LINE__, |
| 678 | "gdbarch: hardwired architecture/machine not recognized"); |
| 679 | } |
| 680 | |
| 681 | /* Set the architecture from a BFD (deprecated) */ |
| 682 | |
| 683 | static void |
| 684 | set_architecture_from_file (bfd *abfd) |
| 685 | { |
| 686 | const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd); |
| 687 | if (GDB_MULTI_ARCH) |
| 688 | internal_error (__FILE__, __LINE__, |
| 689 | "set_architecture_from_file: not multi-arched"); |
| 690 | if (target_architecture_auto) |
| 691 | { |
| 692 | set_arch (wanted, set_arch_auto); |
| 693 | } |
| 694 | else if (wanted != target_architecture) |
| 695 | { |
| 696 | warning ("%s architecture file may be incompatible with %s target.", |
| 697 | wanted->printable_name, |
| 698 | target_architecture->printable_name); |
| 699 | } |
| 700 | } |
| 701 | |
| 702 | |
| 703 | /* Called if the user enters ``show architecture'' without an |
| 704 | argument. */ |
| 705 | |
| 706 | static void |
| 707 | show_architecture (char *args, int from_tty) |
| 708 | { |
| 709 | const char *arch; |
| 710 | arch = TARGET_ARCHITECTURE->printable_name; |
| 711 | if (target_architecture_auto) |
| 712 | printf_filtered ("The target architecture is set automatically (currently %s)\n", arch); |
| 713 | else |
| 714 | printf_filtered ("The target architecture is assumed to be %s\n", arch); |
| 715 | } |
| 716 | |
| 717 | |
| 718 | /* Called if the user enters ``set architecture'' with or without an |
| 719 | argument. */ |
| 720 | |
| 721 | static void |
| 722 | set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c) |
| 723 | { |
| 724 | if (strcmp (set_architecture_string, "auto") == 0) |
| 725 | { |
| 726 | target_architecture_auto = 1; |
| 727 | } |
| 728 | else if (GDB_MULTI_ARCH) |
| 729 | { |
| 730 | struct gdbarch_info info; |
| 731 | gdbarch_info_init (&info); |
| 732 | info.bfd_arch_info = bfd_scan_arch (set_architecture_string); |
| 733 | if (info.bfd_arch_info == NULL) |
| 734 | internal_error (__FILE__, __LINE__, |
| 735 | "set_architecture: bfd_scan_arch failed"); |
| 736 | if (gdbarch_update_p (info)) |
| 737 | target_architecture_auto = 0; |
| 738 | else |
| 739 | printf_unfiltered ("Architecture `%s' not recognized.\n", |
| 740 | set_architecture_string); |
| 741 | } |
| 742 | else |
| 743 | { |
| 744 | const struct bfd_arch_info *arch |
| 745 | = bfd_scan_arch (set_architecture_string); |
| 746 | if (arch == NULL) |
| 747 | internal_error (__FILE__, __LINE__, |
| 748 | "set_architecture: bfd_scan_arch failed"); |
| 749 | set_arch (arch, set_arch_manual); |
| 750 | } |
| 751 | show_architecture (NULL, from_tty); |
| 752 | } |
| 753 | |
| 754 | /* Set the dynamic target-system-dependent parameters (architecture, |
| 755 | byte-order) using information found in the BFD */ |
| 756 | |
| 757 | void |
| 758 | set_gdbarch_from_file (bfd *abfd) |
| 759 | { |
| 760 | if (GDB_MULTI_ARCH) |
| 761 | { |
| 762 | struct gdbarch_info info; |
| 763 | gdbarch_info_init (&info); |
| 764 | info.abfd = abfd; |
| 765 | if (! gdbarch_update_p (info)) |
| 766 | error ("Architecture of file not recognized.\n"); |
| 767 | } |
| 768 | else |
| 769 | { |
| 770 | set_architecture_from_file (abfd); |
| 771 | set_endian_from_file (abfd); |
| 772 | } |
| 773 | } |
| 774 | |
| 775 | /* Initialize the current architecture. Update the ``set |
| 776 | architecture'' command so that it specifies a list of valid |
| 777 | architectures. */ |
| 778 | |
| 779 | #ifdef DEFAULT_BFD_ARCH |
| 780 | extern const bfd_arch_info_type DEFAULT_BFD_ARCH; |
| 781 | static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH; |
| 782 | #else |
| 783 | static const bfd_arch_info_type *default_bfd_arch; |
| 784 | #endif |
| 785 | |
| 786 | #ifdef DEFAULT_BFD_VEC |
| 787 | extern const bfd_target DEFAULT_BFD_VEC; |
| 788 | static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC; |
| 789 | #else |
| 790 | static const bfd_target *default_bfd_vec; |
| 791 | #endif |
| 792 | |
| 793 | void |
| 794 | initialize_current_architecture (void) |
| 795 | { |
| 796 | const char **arches = gdbarch_printable_names (); |
| 797 | |
| 798 | /* determine a default architecture and byte order. */ |
| 799 | struct gdbarch_info info; |
| 800 | gdbarch_info_init (&info); |
| 801 | |
| 802 | /* Find a default architecture. */ |
| 803 | if (info.bfd_arch_info == NULL |
| 804 | && default_bfd_arch != NULL) |
| 805 | info.bfd_arch_info = default_bfd_arch; |
| 806 | if (info.bfd_arch_info == NULL) |
| 807 | { |
| 808 | /* Choose the architecture by taking the first one |
| 809 | alphabetically. */ |
| 810 | const char *chosen = arches[0]; |
| 811 | const char **arch; |
| 812 | for (arch = arches; *arch != NULL; arch++) |
| 813 | { |
| 814 | if (strcmp (*arch, chosen) < 0) |
| 815 | chosen = *arch; |
| 816 | } |
| 817 | if (chosen == NULL) |
| 818 | internal_error (__FILE__, __LINE__, |
| 819 | "initialize_current_architecture: No arch"); |
| 820 | info.bfd_arch_info = bfd_scan_arch (chosen); |
| 821 | if (info.bfd_arch_info == NULL) |
| 822 | internal_error (__FILE__, __LINE__, |
| 823 | "initialize_current_architecture: Arch not found"); |
| 824 | } |
| 825 | |
| 826 | /* Take several guesses at a byte order. */ |
| 827 | if (info.byte_order == BFD_ENDIAN_UNKNOWN |
| 828 | && default_bfd_vec != NULL) |
| 829 | { |
| 830 | /* Extract BFD's default vector's byte order. */ |
| 831 | switch (default_bfd_vec->byteorder) |
| 832 | { |
| 833 | case BFD_ENDIAN_BIG: |
| 834 | info.byte_order = BFD_ENDIAN_BIG; |
| 835 | break; |
| 836 | case BFD_ENDIAN_LITTLE: |
| 837 | info.byte_order = BFD_ENDIAN_LITTLE; |
| 838 | break; |
| 839 | default: |
| 840 | break; |
| 841 | } |
| 842 | } |
| 843 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
| 844 | { |
| 845 | /* look for ``*el-*'' in the target name. */ |
| 846 | const char *chp; |
| 847 | chp = strchr (target_name, '-'); |
| 848 | if (chp != NULL |
| 849 | && chp - 2 >= target_name |
| 850 | && strncmp (chp - 2, "el", 2) == 0) |
| 851 | info.byte_order = BFD_ENDIAN_LITTLE; |
| 852 | } |
| 853 | if (info.byte_order == BFD_ENDIAN_UNKNOWN) |
| 854 | { |
| 855 | /* Wire it to big-endian!!! */ |
| 856 | info.byte_order = BFD_ENDIAN_BIG; |
| 857 | } |
| 858 | |
| 859 | if (GDB_MULTI_ARCH) |
| 860 | { |
| 861 | if (! gdbarch_update_p (info)) |
| 862 | { |
| 863 | internal_error (__FILE__, __LINE__, |
| 864 | "initialize_current_architecture: Selection of initial architecture failed"); |
| 865 | } |
| 866 | } |
| 867 | else |
| 868 | { |
| 869 | /* If the multi-arch logic comes up with a byte-order (from BFD) |
| 870 | use it for the non-multi-arch case. */ |
| 871 | if (info.byte_order != BFD_ENDIAN_UNKNOWN) |
| 872 | target_byte_order = info.byte_order; |
| 873 | initialize_non_multiarch (); |
| 874 | } |
| 875 | |
| 876 | /* Create the ``set architecture'' command appending ``auto'' to the |
| 877 | list of architectures. */ |
| 878 | { |
| 879 | struct cmd_list_element *c; |
| 880 | /* Append ``auto''. */ |
| 881 | int nr; |
| 882 | for (nr = 0; arches[nr] != NULL; nr++); |
| 883 | arches = xrealloc (arches, sizeof (char*) * (nr + 2)); |
| 884 | arches[nr + 0] = "auto"; |
| 885 | arches[nr + 1] = NULL; |
| 886 | /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead |
| 887 | of ``const char *''. We just happen to know that the casts are |
| 888 | safe. */ |
| 889 | c = add_set_enum_cmd ("architecture", class_support, |
| 890 | arches, &set_architecture_string, |
| 891 | "Set architecture of target.", |
| 892 | &setlist); |
| 893 | set_cmd_sfunc (c, set_architecture); |
| 894 | add_alias_cmd ("processor", "architecture", class_support, 1, &setlist); |
| 895 | /* Don't use set_from_show - need to print both auto/manual and |
| 896 | current setting. */ |
| 897 | add_cmd ("architecture", class_support, show_architecture, |
| 898 | "Show the current target architecture", &showlist); |
| 899 | } |
| 900 | } |
| 901 | |
| 902 | |
| 903 | /* Initialize a gdbarch info to values that will be automatically |
| 904 | overridden. Note: Originally, this ``struct info'' was initialized |
| 905 | using memset(0). Unfortunatly, that ran into problems, namely |
| 906 | BFD_ENDIAN_BIG is zero. An explicit initialization function that |
| 907 | can explicitly set each field to a well defined value is used. */ |
| 908 | |
| 909 | void |
| 910 | gdbarch_info_init (struct gdbarch_info *info) |
| 911 | { |
| 912 | memset (info, 0, sizeof (struct gdbarch_info)); |
| 913 | info->byte_order = BFD_ENDIAN_UNKNOWN; |
| 914 | info->osabi = GDB_OSABI_UNINITIALIZED; |
| 915 | } |
| 916 | |
| 917 | /* */ |
| 918 | |
| 919 | extern initialize_file_ftype _initialize_gdbarch_utils; |
| 920 | |
| 921 | void |
| 922 | _initialize_gdbarch_utils (void) |
| 923 | { |
| 924 | struct cmd_list_element *c; |
| 925 | c = add_set_enum_cmd ("endian", class_support, |
| 926 | endian_enum, &set_endian_string, |
| 927 | "Set endianness of target.", |
| 928 | &setlist); |
| 929 | set_cmd_sfunc (c, set_endian); |
| 930 | /* Don't use set_from_show - need to print both auto/manual and |
| 931 | current setting. */ |
| 932 | add_cmd ("endian", class_support, show_endian, |
| 933 | "Show the current byte-order", &showlist); |
| 934 | } |