1 /* Select target systems and architectures at runtime for GDB. 2 3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 5 Free Software Foundation, Inc. 6 7 Contributed by Cygnus Support. 8 9 This file is part of GDB. 10 11 This program is free software; you can redistribute it and/or modify 12 it under the terms of the GNU General Public License as published by 13 the Free Software Foundation; either version 3 of the License, or 14 (at your option) any later version. 15 16 This program is distributed in the hope that it will be useful, 17 but WITHOUT ANY WARRANTY; without even the implied warranty of 18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 GNU General Public License for more details. 20 21 You should have received a copy of the GNU General Public License 22 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 23 24 #include "defs.h" 25 #include <errno.h> 26 #include "gdb_string.h" 27 #include "target.h" 28 #include "gdbcmd.h" 29 #include "symtab.h" 30 #include "inferior.h" 31 #include "bfd.h" 32 #include "symfile.h" 33 #include "objfiles.h" 34 #include "gdb_wait.h" 35 #include "dcache.h" 36 #include <signal.h> 37 #include "regcache.h" 38 #include "gdb_assert.h" 39 #include "gdbcore.h" 40 #include "exceptions.h" 41 #include "target-descriptions.h" 42 #include "gdbthread.h" 43 #include "solib.h" 44 #include "exec.h" 45 #include "inline-frame.h" 46 #include "tracepoint.h" 47 48 static void target_info (char *, int); 49 50 static void default_terminal_info (char *, int); 51 52 static int default_watchpoint_addr_within_range (struct target_ops *, 53 CORE_ADDR, CORE_ADDR, int); 54 55 static int default_region_ok_for_hw_watchpoint (CORE_ADDR, int); 56 57 static int nosymbol (char *, CORE_ADDR *); 58 59 static void tcomplain (void) ATTRIBUTE_NORETURN; 60 61 static int nomemory (CORE_ADDR, char *, int, int, struct target_ops *); 62 63 static int return_zero (void); 64 65 static int return_one (void); 66 67 static int return_minus_one (void); 68 69 void target_ignore (void); 70 71 static void target_command (char *, int); 72 73 static struct target_ops *find_default_run_target (char *); 74 75 static LONGEST default_xfer_partial (struct target_ops *ops, 76 enum target_object object, 77 const char *annex, gdb_byte *readbuf, 78 const gdb_byte *writebuf, 79 ULONGEST offset, LONGEST len); 80 81 static LONGEST current_xfer_partial (struct target_ops *ops, 82 enum target_object object, 83 const char *annex, gdb_byte *readbuf, 84 const gdb_byte *writebuf, 85 ULONGEST offset, LONGEST len); 86 87 static LONGEST target_xfer_partial (struct target_ops *ops, 88 enum target_object object, 89 const char *annex, 90 void *readbuf, const void *writebuf, 91 ULONGEST offset, LONGEST len); 92 93 static struct gdbarch *default_thread_architecture (struct target_ops *ops, 94 ptid_t ptid); 95 96 static void init_dummy_target (void); 97 98 static struct target_ops debug_target; 99 100 static void debug_to_open (char *, int); 101 102 static void debug_to_prepare_to_store (struct regcache *); 103 104 static void debug_to_files_info (struct target_ops *); 105 106 static int debug_to_insert_breakpoint (struct gdbarch *, 107 struct bp_target_info *); 108 109 static int debug_to_remove_breakpoint (struct gdbarch *, 110 struct bp_target_info *); 111 112 static int debug_to_can_use_hw_breakpoint (int, int, int); 113 114 static int debug_to_insert_hw_breakpoint (struct gdbarch *, 115 struct bp_target_info *); 116 117 static int debug_to_remove_hw_breakpoint (struct gdbarch *, 118 struct bp_target_info *); 119 120 static int debug_to_insert_watchpoint (CORE_ADDR, int, int, 121 struct expression *); 122 123 static int debug_to_remove_watchpoint (CORE_ADDR, int, int, 124 struct expression *); 125 126 static int debug_to_stopped_by_watchpoint (void); 127 128 static int debug_to_stopped_data_address (struct target_ops *, CORE_ADDR *); 129 130 static int debug_to_watchpoint_addr_within_range (struct target_ops *, 131 CORE_ADDR, CORE_ADDR, int); 132 133 static int debug_to_region_ok_for_hw_watchpoint (CORE_ADDR, int); 134 135 static int debug_to_can_accel_watchpoint_condition (CORE_ADDR, int, int, 136 struct expression *); 137 138 static void debug_to_terminal_init (void); 139 140 static void debug_to_terminal_inferior (void); 141 142 static void debug_to_terminal_ours_for_output (void); 143 144 static void debug_to_terminal_save_ours (void); 145 146 static void debug_to_terminal_ours (void); 147 148 static void debug_to_terminal_info (char *, int); 149 150 static void debug_to_load (char *, int); 151 152 static int debug_to_lookup_symbol (char *, CORE_ADDR *); 153 154 static int debug_to_can_run (void); 155 156 static void debug_to_notice_signals (ptid_t); 157 158 static void debug_to_stop (ptid_t); 159 160 /* NOTE: cagney/2004-09-29: Many targets reference this variable in 161 wierd and mysterious ways. Putting the variable here lets those 162 wierd and mysterious ways keep building while they are being 163 converted to the inferior inheritance structure. */ 164 struct target_ops deprecated_child_ops; 165 166 /* Pointer to array of target architecture structures; the size of the 167 array; the current index into the array; the allocated size of the 168 array. */ 169 struct target_ops **target_structs; 170 unsigned target_struct_size; 171 unsigned target_struct_index; 172 unsigned target_struct_allocsize; 173 #define DEFAULT_ALLOCSIZE 10 174 175 /* The initial current target, so that there is always a semi-valid 176 current target. */ 177 178 static struct target_ops dummy_target; 179 180 /* Top of target stack. */ 181 182 static struct target_ops *target_stack; 183 184 /* The target structure we are currently using to talk to a process 185 or file or whatever "inferior" we have. */ 186 187 struct target_ops current_target; 188 189 /* Command list for target. */ 190 191 static struct cmd_list_element *targetlist = NULL; 192 193 /* Nonzero if we should trust readonly sections from the 194 executable when reading memory. */ 195 196 static int trust_readonly = 0; 197 198 /* Nonzero if we should show true memory content including 199 memory breakpoint inserted by gdb. */ 200 201 static int show_memory_breakpoints = 0; 202 203 /* These globals control whether GDB attempts to perform these 204 operations; they are useful for targets that need to prevent 205 inadvertant disruption, such as in non-stop mode. */ 206 207 int may_write_registers = 1; 208 209 int may_write_memory = 1; 210 211 int may_insert_breakpoints = 1; 212 213 int may_insert_tracepoints = 1; 214 215 int may_insert_fast_tracepoints = 1; 216 217 int may_stop = 1; 218 219 /* Non-zero if we want to see trace of target level stuff. */ 220 221 static int targetdebug = 0; 222 static void 223 show_targetdebug (struct ui_file *file, int from_tty, 224 struct cmd_list_element *c, const char *value) 225 { 226 fprintf_filtered (file, _("Target debugging is %s.\n"), value); 227 } 228 229 static void setup_target_debug (void); 230 231 /* The option sets this. */ 232 static int stack_cache_enabled_p_1 = 1; 233 /* And set_stack_cache_enabled_p updates this. 234 The reason for the separation is so that we don't flush the cache for 235 on->on transitions. */ 236 static int stack_cache_enabled_p = 1; 237 238 /* This is called *after* the stack-cache has been set. 239 Flush the cache for off->on and on->off transitions. 240 There's no real need to flush the cache for on->off transitions, 241 except cleanliness. */ 242 243 static void 244 set_stack_cache_enabled_p (char *args, int from_tty, 245 struct cmd_list_element *c) 246 { 247 if (stack_cache_enabled_p != stack_cache_enabled_p_1) 248 target_dcache_invalidate (); 249 250 stack_cache_enabled_p = stack_cache_enabled_p_1; 251 } 252 253 static void 254 show_stack_cache_enabled_p (struct ui_file *file, int from_tty, 255 struct cmd_list_element *c, const char *value) 256 { 257 fprintf_filtered (file, _("Cache use for stack accesses is %s.\n"), value); 258 } 259 260 /* Cache of memory operations, to speed up remote access. */ 261 static DCACHE *target_dcache; 262 263 /* Invalidate the target dcache. */ 264 265 void 266 target_dcache_invalidate (void) 267 { 268 dcache_invalidate (target_dcache); 269 } 270 271 /* The user just typed 'target' without the name of a target. */ 272 273 static void 274 target_command (char *arg, int from_tty) 275 { 276 fputs_filtered ("Argument required (target name). Try `help target'\n", 277 gdb_stdout); 278 } 279 280 /* Default target_has_* methods for process_stratum targets. */ 281 282 int 283 default_child_has_all_memory (struct target_ops *ops) 284 { 285 /* If no inferior selected, then we can't read memory here. */ 286 if (ptid_equal (inferior_ptid, null_ptid)) 287 return 0; 288 289 return 1; 290 } 291 292 int 293 default_child_has_memory (struct target_ops *ops) 294 { 295 /* If no inferior selected, then we can't read memory here. */ 296 if (ptid_equal (inferior_ptid, null_ptid)) 297 return 0; 298 299 return 1; 300 } 301 302 int 303 default_child_has_stack (struct target_ops *ops) 304 { 305 /* If no inferior selected, there's no stack. */ 306 if (ptid_equal (inferior_ptid, null_ptid)) 307 return 0; 308 309 return 1; 310 } 311 312 int 313 default_child_has_registers (struct target_ops *ops) 314 { 315 /* Can't read registers from no inferior. */ 316 if (ptid_equal (inferior_ptid, null_ptid)) 317 return 0; 318 319 return 1; 320 } 321 322 int 323 default_child_has_execution (struct target_ops *ops) 324 { 325 /* If there's no thread selected, then we can't make it run through 326 hoops. */ 327 if (ptid_equal (inferior_ptid, null_ptid)) 328 return 0; 329 330 return 1; 331 } 332 333 334 int 335 target_has_all_memory_1 (void) 336 { 337 struct target_ops *t; 338 339 for (t = current_target.beneath; t != NULL; t = t->beneath) 340 if (t->to_has_all_memory (t)) 341 return 1; 342 343 return 0; 344 } 345 346 int 347 target_has_memory_1 (void) 348 { 349 struct target_ops *t; 350 351 for (t = current_target.beneath; t != NULL; t = t->beneath) 352 if (t->to_has_memory (t)) 353 return 1; 354 355 return 0; 356 } 357 358 int 359 target_has_stack_1 (void) 360 { 361 struct target_ops *t; 362 363 for (t = current_target.beneath; t != NULL; t = t->beneath) 364 if (t->to_has_stack (t)) 365 return 1; 366 367 return 0; 368 } 369 370 int 371 target_has_registers_1 (void) 372 { 373 struct target_ops *t; 374 375 for (t = current_target.beneath; t != NULL; t = t->beneath) 376 if (t->to_has_registers (t)) 377 return 1; 378 379 return 0; 380 } 381 382 int 383 target_has_execution_1 (void) 384 { 385 struct target_ops *t; 386 387 for (t = current_target.beneath; t != NULL; t = t->beneath) 388 if (t->to_has_execution (t)) 389 return 1; 390 391 return 0; 392 } 393 394 /* Add a possible target architecture to the list. */ 395 396 void 397 add_target (struct target_ops *t) 398 { 399 /* Provide default values for all "must have" methods. */ 400 if (t->to_xfer_partial == NULL) 401 t->to_xfer_partial = default_xfer_partial; 402 403 if (t->to_has_all_memory == NULL) 404 t->to_has_all_memory = (int (*) (struct target_ops *)) return_zero; 405 406 if (t->to_has_memory == NULL) 407 t->to_has_memory = (int (*) (struct target_ops *)) return_zero; 408 409 if (t->to_has_stack == NULL) 410 t->to_has_stack = (int (*) (struct target_ops *)) return_zero; 411 412 if (t->to_has_registers == NULL) 413 t->to_has_registers = (int (*) (struct target_ops *)) return_zero; 414 415 if (t->to_has_execution == NULL) 416 t->to_has_execution = (int (*) (struct target_ops *)) return_zero; 417 418 if (!target_structs) 419 { 420 target_struct_allocsize = DEFAULT_ALLOCSIZE; 421 target_structs = (struct target_ops **) xmalloc 422 (target_struct_allocsize * sizeof (*target_structs)); 423 } 424 if (target_struct_size >= target_struct_allocsize) 425 { 426 target_struct_allocsize *= 2; 427 target_structs = (struct target_ops **) 428 xrealloc ((char *) target_structs, 429 target_struct_allocsize * sizeof (*target_structs)); 430 } 431 target_structs[target_struct_size++] = t; 432 433 if (targetlist == NULL) 434 add_prefix_cmd ("target", class_run, target_command, _("\ 435 Connect to a target machine or process.\n\ 436 The first argument is the type or protocol of the target machine.\n\ 437 Remaining arguments are interpreted by the target protocol. For more\n\ 438 information on the arguments for a particular protocol, type\n\ 439 `help target ' followed by the protocol name."), 440 &targetlist, "target ", 0, &cmdlist); 441 add_cmd (t->to_shortname, no_class, t->to_open, t->to_doc, &targetlist); 442 } 443 444 /* Stub functions */ 445 446 void 447 target_ignore (void) 448 { 449 } 450 451 void 452 target_kill (void) 453 { 454 struct target_ops *t; 455 456 for (t = current_target.beneath; t != NULL; t = t->beneath) 457 if (t->to_kill != NULL) 458 { 459 if (targetdebug) 460 fprintf_unfiltered (gdb_stdlog, "target_kill ()\n"); 461 462 t->to_kill (t); 463 return; 464 } 465 466 noprocess (); 467 } 468 469 void 470 target_load (char *arg, int from_tty) 471 { 472 target_dcache_invalidate (); 473 (*current_target.to_load) (arg, from_tty); 474 } 475 476 void 477 target_create_inferior (char *exec_file, char *args, 478 char **env, int from_tty) 479 { 480 struct target_ops *t; 481 482 for (t = current_target.beneath; t != NULL; t = t->beneath) 483 { 484 if (t->to_create_inferior != NULL) 485 { 486 t->to_create_inferior (t, exec_file, args, env, from_tty); 487 if (targetdebug) 488 fprintf_unfiltered (gdb_stdlog, 489 "target_create_inferior (%s, %s, xxx, %d)\n", 490 exec_file, args, from_tty); 491 return; 492 } 493 } 494 495 internal_error (__FILE__, __LINE__, 496 "could not find a target to create inferior"); 497 } 498 499 void 500 target_terminal_inferior (void) 501 { 502 /* A background resume (``run&'') should leave GDB in control of the 503 terminal. Use target_can_async_p, not target_is_async_p, since at 504 this point the target is not async yet. However, if sync_execution 505 is not set, we know it will become async prior to resume. */ 506 if (target_can_async_p () && !sync_execution) 507 return; 508 509 /* If GDB is resuming the inferior in the foreground, install 510 inferior's terminal modes. */ 511 (*current_target.to_terminal_inferior) (); 512 } 513 514 static int 515 nomemory (CORE_ADDR memaddr, char *myaddr, int len, int write, 516 struct target_ops *t) 517 { 518 errno = EIO; /* Can't read/write this location */ 519 return 0; /* No bytes handled */ 520 } 521 522 static void 523 tcomplain (void) 524 { 525 error (_("You can't do that when your target is `%s'"), 526 current_target.to_shortname); 527 } 528 529 void 530 noprocess (void) 531 { 532 error (_("You can't do that without a process to debug.")); 533 } 534 535 static int 536 nosymbol (char *name, CORE_ADDR *addrp) 537 { 538 return 1; /* Symbol does not exist in target env */ 539 } 540 541 static void 542 default_terminal_info (char *args, int from_tty) 543 { 544 printf_unfiltered (_("No saved terminal information.\n")); 545 } 546 547 /* A default implementation for the to_get_ada_task_ptid target method. 548 549 This function builds the PTID by using both LWP and TID as part of 550 the PTID lwp and tid elements. The pid used is the pid of the 551 inferior_ptid. */ 552 553 static ptid_t 554 default_get_ada_task_ptid (long lwp, long tid) 555 { 556 return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid); 557 } 558 559 /* Go through the target stack from top to bottom, copying over zero 560 entries in current_target, then filling in still empty entries. In 561 effect, we are doing class inheritance through the pushed target 562 vectors. 563 564 NOTE: cagney/2003-10-17: The problem with this inheritance, as it 565 is currently implemented, is that it discards any knowledge of 566 which target an inherited method originally belonged to. 567 Consequently, new new target methods should instead explicitly and 568 locally search the target stack for the target that can handle the 569 request. */ 570 571 static void 572 update_current_target (void) 573 { 574 struct target_ops *t; 575 576 /* First, reset current's contents. */ 577 memset (¤t_target, 0, sizeof (current_target)); 578 579 #define INHERIT(FIELD, TARGET) \ 580 if (!current_target.FIELD) \ 581 current_target.FIELD = (TARGET)->FIELD 582 583 for (t = target_stack; t; t = t->beneath) 584 { 585 INHERIT (to_shortname, t); 586 INHERIT (to_longname, t); 587 INHERIT (to_doc, t); 588 /* Do not inherit to_open. */ 589 /* Do not inherit to_close. */ 590 /* Do not inherit to_attach. */ 591 INHERIT (to_post_attach, t); 592 INHERIT (to_attach_no_wait, t); 593 /* Do not inherit to_detach. */ 594 /* Do not inherit to_disconnect. */ 595 /* Do not inherit to_resume. */ 596 /* Do not inherit to_wait. */ 597 /* Do not inherit to_fetch_registers. */ 598 /* Do not inherit to_store_registers. */ 599 INHERIT (to_prepare_to_store, t); 600 INHERIT (deprecated_xfer_memory, t); 601 INHERIT (to_files_info, t); 602 INHERIT (to_insert_breakpoint, t); 603 INHERIT (to_remove_breakpoint, t); 604 INHERIT (to_can_use_hw_breakpoint, t); 605 INHERIT (to_insert_hw_breakpoint, t); 606 INHERIT (to_remove_hw_breakpoint, t); 607 INHERIT (to_insert_watchpoint, t); 608 INHERIT (to_remove_watchpoint, t); 609 INHERIT (to_stopped_data_address, t); 610 INHERIT (to_have_steppable_watchpoint, t); 611 INHERIT (to_have_continuable_watchpoint, t); 612 INHERIT (to_stopped_by_watchpoint, t); 613 INHERIT (to_watchpoint_addr_within_range, t); 614 INHERIT (to_region_ok_for_hw_watchpoint, t); 615 INHERIT (to_can_accel_watchpoint_condition, t); 616 INHERIT (to_terminal_init, t); 617 INHERIT (to_terminal_inferior, t); 618 INHERIT (to_terminal_ours_for_output, t); 619 INHERIT (to_terminal_ours, t); 620 INHERIT (to_terminal_save_ours, t); 621 INHERIT (to_terminal_info, t); 622 /* Do not inherit to_kill. */ 623 INHERIT (to_load, t); 624 INHERIT (to_lookup_symbol, t); 625 /* Do no inherit to_create_inferior. */ 626 INHERIT (to_post_startup_inferior, t); 627 INHERIT (to_acknowledge_created_inferior, t); 628 INHERIT (to_insert_fork_catchpoint, t); 629 INHERIT (to_remove_fork_catchpoint, t); 630 INHERIT (to_insert_vfork_catchpoint, t); 631 INHERIT (to_remove_vfork_catchpoint, t); 632 /* Do not inherit to_follow_fork. */ 633 INHERIT (to_insert_exec_catchpoint, t); 634 INHERIT (to_remove_exec_catchpoint, t); 635 INHERIT (to_set_syscall_catchpoint, t); 636 INHERIT (to_has_exited, t); 637 /* Do not inherit to_mourn_inferior. */ 638 INHERIT (to_can_run, t); 639 INHERIT (to_notice_signals, t); 640 /* Do not inherit to_thread_alive. */ 641 /* Do not inherit to_find_new_threads. */ 642 /* Do not inherit to_pid_to_str. */ 643 INHERIT (to_extra_thread_info, t); 644 INHERIT (to_stop, t); 645 /* Do not inherit to_xfer_partial. */ 646 INHERIT (to_rcmd, t); 647 INHERIT (to_pid_to_exec_file, t); 648 INHERIT (to_log_command, t); 649 INHERIT (to_stratum, t); 650 /* Do not inherit to_has_all_memory */ 651 /* Do not inherit to_has_memory */ 652 /* Do not inherit to_has_stack */ 653 /* Do not inherit to_has_registers */ 654 /* Do not inherit to_has_execution */ 655 INHERIT (to_has_thread_control, t); 656 INHERIT (to_can_async_p, t); 657 INHERIT (to_is_async_p, t); 658 INHERIT (to_async, t); 659 INHERIT (to_async_mask, t); 660 INHERIT (to_find_memory_regions, t); 661 INHERIT (to_make_corefile_notes, t); 662 INHERIT (to_get_bookmark, t); 663 INHERIT (to_goto_bookmark, t); 664 /* Do not inherit to_get_thread_local_address. */ 665 INHERIT (to_can_execute_reverse, t); 666 INHERIT (to_thread_architecture, t); 667 /* Do not inherit to_read_description. */ 668 INHERIT (to_get_ada_task_ptid, t); 669 /* Do not inherit to_search_memory. */ 670 INHERIT (to_supports_multi_process, t); 671 INHERIT (to_trace_init, t); 672 INHERIT (to_download_tracepoint, t); 673 INHERIT (to_download_trace_state_variable, t); 674 INHERIT (to_trace_set_readonly_regions, t); 675 INHERIT (to_trace_start, t); 676 INHERIT (to_get_trace_status, t); 677 INHERIT (to_trace_stop, t); 678 INHERIT (to_trace_find, t); 679 INHERIT (to_get_trace_state_variable_value, t); 680 INHERIT (to_save_trace_data, t); 681 INHERIT (to_upload_tracepoints, t); 682 INHERIT (to_upload_trace_state_variables, t); 683 INHERIT (to_get_raw_trace_data, t); 684 INHERIT (to_set_disconnected_tracing, t); 685 INHERIT (to_set_circular_trace_buffer, t); 686 INHERIT (to_get_tib_address, t); 687 INHERIT (to_set_permissions, t); 688 INHERIT (to_static_tracepoint_marker_at, t); 689 INHERIT (to_static_tracepoint_markers_by_strid, t); 690 INHERIT (to_magic, t); 691 /* Do not inherit to_memory_map. */ 692 /* Do not inherit to_flash_erase. */ 693 /* Do not inherit to_flash_done. */ 694 } 695 #undef INHERIT 696 697 /* Clean up a target struct so it no longer has any zero pointers in 698 it. Some entries are defaulted to a method that print an error, 699 others are hard-wired to a standard recursive default. */ 700 701 #define de_fault(field, value) \ 702 if (!current_target.field) \ 703 current_target.field = value 704 705 de_fault (to_open, 706 (void (*) (char *, int)) 707 tcomplain); 708 de_fault (to_close, 709 (void (*) (int)) 710 target_ignore); 711 de_fault (to_post_attach, 712 (void (*) (int)) 713 target_ignore); 714 de_fault (to_prepare_to_store, 715 (void (*) (struct regcache *)) 716 noprocess); 717 de_fault (deprecated_xfer_memory, 718 (int (*) (CORE_ADDR, gdb_byte *, int, int, struct mem_attrib *, struct target_ops *)) 719 nomemory); 720 de_fault (to_files_info, 721 (void (*) (struct target_ops *)) 722 target_ignore); 723 de_fault (to_insert_breakpoint, 724 memory_insert_breakpoint); 725 de_fault (to_remove_breakpoint, 726 memory_remove_breakpoint); 727 de_fault (to_can_use_hw_breakpoint, 728 (int (*) (int, int, int)) 729 return_zero); 730 de_fault (to_insert_hw_breakpoint, 731 (int (*) (struct gdbarch *, struct bp_target_info *)) 732 return_minus_one); 733 de_fault (to_remove_hw_breakpoint, 734 (int (*) (struct gdbarch *, struct bp_target_info *)) 735 return_minus_one); 736 de_fault (to_insert_watchpoint, 737 (int (*) (CORE_ADDR, int, int, struct expression *)) 738 return_minus_one); 739 de_fault (to_remove_watchpoint, 740 (int (*) (CORE_ADDR, int, int, struct expression *)) 741 return_minus_one); 742 de_fault (to_stopped_by_watchpoint, 743 (int (*) (void)) 744 return_zero); 745 de_fault (to_stopped_data_address, 746 (int (*) (struct target_ops *, CORE_ADDR *)) 747 return_zero); 748 de_fault (to_watchpoint_addr_within_range, 749 default_watchpoint_addr_within_range); 750 de_fault (to_region_ok_for_hw_watchpoint, 751 default_region_ok_for_hw_watchpoint); 752 de_fault (to_can_accel_watchpoint_condition, 753 (int (*) (CORE_ADDR, int, int, struct expression *)) 754 return_zero); 755 de_fault (to_terminal_init, 756 (void (*) (void)) 757 target_ignore); 758 de_fault (to_terminal_inferior, 759 (void (*) (void)) 760 target_ignore); 761 de_fault (to_terminal_ours_for_output, 762 (void (*) (void)) 763 target_ignore); 764 de_fault (to_terminal_ours, 765 (void (*) (void)) 766 target_ignore); 767 de_fault (to_terminal_save_ours, 768 (void (*) (void)) 769 target_ignore); 770 de_fault (to_terminal_info, 771 default_terminal_info); 772 de_fault (to_load, 773 (void (*) (char *, int)) 774 tcomplain); 775 de_fault (to_lookup_symbol, 776 (int (*) (char *, CORE_ADDR *)) 777 nosymbol); 778 de_fault (to_post_startup_inferior, 779 (void (*) (ptid_t)) 780 target_ignore); 781 de_fault (to_acknowledge_created_inferior, 782 (void (*) (int)) 783 target_ignore); 784 de_fault (to_insert_fork_catchpoint, 785 (void (*) (int)) 786 tcomplain); 787 de_fault (to_remove_fork_catchpoint, 788 (int (*) (int)) 789 tcomplain); 790 de_fault (to_insert_vfork_catchpoint, 791 (void (*) (int)) 792 tcomplain); 793 de_fault (to_remove_vfork_catchpoint, 794 (int (*) (int)) 795 tcomplain); 796 de_fault (to_insert_exec_catchpoint, 797 (void (*) (int)) 798 tcomplain); 799 de_fault (to_remove_exec_catchpoint, 800 (int (*) (int)) 801 tcomplain); 802 de_fault (to_set_syscall_catchpoint, 803 (int (*) (int, int, int, int, int *)) 804 tcomplain); 805 de_fault (to_has_exited, 806 (int (*) (int, int, int *)) 807 return_zero); 808 de_fault (to_can_run, 809 return_zero); 810 de_fault (to_notice_signals, 811 (void (*) (ptid_t)) 812 target_ignore); 813 de_fault (to_extra_thread_info, 814 (char *(*) (struct thread_info *)) 815 return_zero); 816 de_fault (to_stop, 817 (void (*) (ptid_t)) 818 target_ignore); 819 current_target.to_xfer_partial = current_xfer_partial; 820 de_fault (to_rcmd, 821 (void (*) (char *, struct ui_file *)) 822 tcomplain); 823 de_fault (to_pid_to_exec_file, 824 (char *(*) (int)) 825 return_zero); 826 de_fault (to_async, 827 (void (*) (void (*) (enum inferior_event_type, void*), void*)) 828 tcomplain); 829 de_fault (to_async_mask, 830 (int (*) (int)) 831 return_one); 832 de_fault (to_thread_architecture, 833 default_thread_architecture); 834 current_target.to_read_description = NULL; 835 de_fault (to_get_ada_task_ptid, 836 (ptid_t (*) (long, long)) 837 default_get_ada_task_ptid); 838 de_fault (to_supports_multi_process, 839 (int (*) (void)) 840 return_zero); 841 de_fault (to_trace_init, 842 (void (*) (void)) 843 tcomplain); 844 de_fault (to_download_tracepoint, 845 (void (*) (struct breakpoint *)) 846 tcomplain); 847 de_fault (to_download_trace_state_variable, 848 (void (*) (struct trace_state_variable *)) 849 tcomplain); 850 de_fault (to_trace_set_readonly_regions, 851 (void (*) (void)) 852 tcomplain); 853 de_fault (to_trace_start, 854 (void (*) (void)) 855 tcomplain); 856 de_fault (to_get_trace_status, 857 (int (*) (struct trace_status *)) 858 return_minus_one); 859 de_fault (to_trace_stop, 860 (void (*) (void)) 861 tcomplain); 862 de_fault (to_trace_find, 863 (int (*) (enum trace_find_type, int, ULONGEST, ULONGEST, int *)) 864 return_minus_one); 865 de_fault (to_get_trace_state_variable_value, 866 (int (*) (int, LONGEST *)) 867 return_zero); 868 de_fault (to_save_trace_data, 869 (int (*) (const char *)) 870 tcomplain); 871 de_fault (to_upload_tracepoints, 872 (int (*) (struct uploaded_tp **)) 873 return_zero); 874 de_fault (to_upload_trace_state_variables, 875 (int (*) (struct uploaded_tsv **)) 876 return_zero); 877 de_fault (to_get_raw_trace_data, 878 (LONGEST (*) (gdb_byte *, ULONGEST, LONGEST)) 879 tcomplain); 880 de_fault (to_set_disconnected_tracing, 881 (void (*) (int)) 882 target_ignore); 883 de_fault (to_set_circular_trace_buffer, 884 (void (*) (int)) 885 target_ignore); 886 de_fault (to_get_tib_address, 887 (int (*) (ptid_t, CORE_ADDR *)) 888 tcomplain); 889 de_fault (to_set_permissions, 890 (void (*) (void)) 891 target_ignore); 892 de_fault (to_static_tracepoint_marker_at, 893 (int (*) (CORE_ADDR, struct static_tracepoint_marker *)) 894 return_zero); 895 de_fault (to_static_tracepoint_markers_by_strid, 896 (VEC(static_tracepoint_marker_p) * (*) (const char *)) 897 tcomplain); 898 #undef de_fault 899 900 /* Finally, position the target-stack beneath the squashed 901 "current_target". That way code looking for a non-inherited 902 target method can quickly and simply find it. */ 903 current_target.beneath = target_stack; 904 905 if (targetdebug) 906 setup_target_debug (); 907 } 908 909 /* Push a new target type into the stack of the existing target accessors, 910 possibly superseding some of the existing accessors. 911 912 Rather than allow an empty stack, we always have the dummy target at 913 the bottom stratum, so we can call the function vectors without 914 checking them. */ 915 916 void 917 push_target (struct target_ops *t) 918 { 919 struct target_ops **cur; 920 921 /* Check magic number. If wrong, it probably means someone changed 922 the struct definition, but not all the places that initialize one. */ 923 if (t->to_magic != OPS_MAGIC) 924 { 925 fprintf_unfiltered (gdb_stderr, 926 "Magic number of %s target struct wrong\n", 927 t->to_shortname); 928 internal_error (__FILE__, __LINE__, _("failed internal consistency check")); 929 } 930 931 /* Find the proper stratum to install this target in. */ 932 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) 933 { 934 if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum) 935 break; 936 } 937 938 /* If there's already targets at this stratum, remove them. */ 939 /* FIXME: cagney/2003-10-15: I think this should be popping all 940 targets to CUR, and not just those at this stratum level. */ 941 while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum) 942 { 943 /* There's already something at this stratum level. Close it, 944 and un-hook it from the stack. */ 945 struct target_ops *tmp = (*cur); 946 947 (*cur) = (*cur)->beneath; 948 tmp->beneath = NULL; 949 target_close (tmp, 0); 950 } 951 952 /* We have removed all targets in our stratum, now add the new one. */ 953 t->beneath = (*cur); 954 (*cur) = t; 955 956 update_current_target (); 957 } 958 959 /* Remove a target_ops vector from the stack, wherever it may be. 960 Return how many times it was removed (0 or 1). */ 961 962 int 963 unpush_target (struct target_ops *t) 964 { 965 struct target_ops **cur; 966 struct target_ops *tmp; 967 968 if (t->to_stratum == dummy_stratum) 969 internal_error (__FILE__, __LINE__, 970 "Attempt to unpush the dummy target"); 971 972 /* Look for the specified target. Note that we assume that a target 973 can only occur once in the target stack. */ 974 975 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) 976 { 977 if ((*cur) == t) 978 break; 979 } 980 981 if ((*cur) == NULL) 982 return 0; /* Didn't find target_ops, quit now */ 983 984 /* NOTE: cagney/2003-12-06: In '94 the close call was made 985 unconditional by moving it to before the above check that the 986 target was in the target stack (something about "Change the way 987 pushing and popping of targets work to support target overlays 988 and inheritance"). This doesn't make much sense - only open 989 targets should be closed. */ 990 target_close (t, 0); 991 992 /* Unchain the target */ 993 tmp = (*cur); 994 (*cur) = (*cur)->beneath; 995 tmp->beneath = NULL; 996 997 update_current_target (); 998 999 return 1; 1000 } 1001 1002 void 1003 pop_target (void) 1004 { 1005 target_close (target_stack, 0); /* Let it clean up */ 1006 if (unpush_target (target_stack) == 1) 1007 return; 1008 1009 fprintf_unfiltered (gdb_stderr, 1010 "pop_target couldn't find target %s\n", 1011 current_target.to_shortname); 1012 internal_error (__FILE__, __LINE__, 1013 _("failed internal consistency check")); 1014 } 1015 1016 void 1017 pop_all_targets_above (enum strata above_stratum, int quitting) 1018 { 1019 while ((int) (current_target.to_stratum) > (int) above_stratum) 1020 { 1021 target_close (target_stack, quitting); 1022 if (!unpush_target (target_stack)) 1023 { 1024 fprintf_unfiltered (gdb_stderr, 1025 "pop_all_targets couldn't find target %s\n", 1026 target_stack->to_shortname); 1027 internal_error (__FILE__, __LINE__, 1028 _("failed internal consistency check")); 1029 break; 1030 } 1031 } 1032 } 1033 1034 void 1035 pop_all_targets (int quitting) 1036 { 1037 pop_all_targets_above (dummy_stratum, quitting); 1038 } 1039 1040 /* Using the objfile specified in OBJFILE, find the address for the 1041 current thread's thread-local storage with offset OFFSET. */ 1042 CORE_ADDR 1043 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) 1044 { 1045 volatile CORE_ADDR addr = 0; 1046 struct target_ops *target; 1047 1048 for (target = current_target.beneath; 1049 target != NULL; 1050 target = target->beneath) 1051 { 1052 if (target->to_get_thread_local_address != NULL) 1053 break; 1054 } 1055 1056 if (target != NULL 1057 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch)) 1058 { 1059 ptid_t ptid = inferior_ptid; 1060 volatile struct gdb_exception ex; 1061 1062 TRY_CATCH (ex, RETURN_MASK_ALL) 1063 { 1064 CORE_ADDR lm_addr; 1065 1066 /* Fetch the load module address for this objfile. */ 1067 lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch, 1068 objfile); 1069 /* If it's 0, throw the appropriate exception. */ 1070 if (lm_addr == 0) 1071 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR, 1072 _("TLS load module not found")); 1073 1074 addr = target->to_get_thread_local_address (target, ptid, lm_addr, offset); 1075 } 1076 /* If an error occurred, print TLS related messages here. Otherwise, 1077 throw the error to some higher catcher. */ 1078 if (ex.reason < 0) 1079 { 1080 int objfile_is_library = (objfile->flags & OBJF_SHARED); 1081 1082 switch (ex.error) 1083 { 1084 case TLS_NO_LIBRARY_SUPPORT_ERROR: 1085 error (_("Cannot find thread-local variables in this thread library.")); 1086 break; 1087 case TLS_LOAD_MODULE_NOT_FOUND_ERROR: 1088 if (objfile_is_library) 1089 error (_("Cannot find shared library `%s' in dynamic" 1090 " linker's load module list"), objfile->name); 1091 else 1092 error (_("Cannot find executable file `%s' in dynamic" 1093 " linker's load module list"), objfile->name); 1094 break; 1095 case TLS_NOT_ALLOCATED_YET_ERROR: 1096 if (objfile_is_library) 1097 error (_("The inferior has not yet allocated storage for" 1098 " thread-local variables in\n" 1099 "the shared library `%s'\n" 1100 "for %s"), 1101 objfile->name, target_pid_to_str (ptid)); 1102 else 1103 error (_("The inferior has not yet allocated storage for" 1104 " thread-local variables in\n" 1105 "the executable `%s'\n" 1106 "for %s"), 1107 objfile->name, target_pid_to_str (ptid)); 1108 break; 1109 case TLS_GENERIC_ERROR: 1110 if (objfile_is_library) 1111 error (_("Cannot find thread-local storage for %s, " 1112 "shared library %s:\n%s"), 1113 target_pid_to_str (ptid), 1114 objfile->name, ex.message); 1115 else 1116 error (_("Cannot find thread-local storage for %s, " 1117 "executable file %s:\n%s"), 1118 target_pid_to_str (ptid), 1119 objfile->name, ex.message); 1120 break; 1121 default: 1122 throw_exception (ex); 1123 break; 1124 } 1125 } 1126 } 1127 /* It wouldn't be wrong here to try a gdbarch method, too; finding 1128 TLS is an ABI-specific thing. But we don't do that yet. */ 1129 else 1130 error (_("Cannot find thread-local variables on this target")); 1131 1132 return addr; 1133 } 1134 1135 #undef MIN 1136 #define MIN(A, B) (((A) <= (B)) ? (A) : (B)) 1137 1138 /* target_read_string -- read a null terminated string, up to LEN bytes, 1139 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful. 1140 Set *STRING to a pointer to malloc'd memory containing the data; the caller 1141 is responsible for freeing it. Return the number of bytes successfully 1142 read. */ 1143 1144 int 1145 target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop) 1146 { 1147 int tlen, origlen, offset, i; 1148 gdb_byte buf[4]; 1149 int errcode = 0; 1150 char *buffer; 1151 int buffer_allocated; 1152 char *bufptr; 1153 unsigned int nbytes_read = 0; 1154 1155 gdb_assert (string); 1156 1157 /* Small for testing. */ 1158 buffer_allocated = 4; 1159 buffer = xmalloc (buffer_allocated); 1160 bufptr = buffer; 1161 1162 origlen = len; 1163 1164 while (len > 0) 1165 { 1166 tlen = MIN (len, 4 - (memaddr & 3)); 1167 offset = memaddr & 3; 1168 1169 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf); 1170 if (errcode != 0) 1171 { 1172 /* The transfer request might have crossed the boundary to an 1173 unallocated region of memory. Retry the transfer, requesting 1174 a single byte. */ 1175 tlen = 1; 1176 offset = 0; 1177 errcode = target_read_memory (memaddr, buf, 1); 1178 if (errcode != 0) 1179 goto done; 1180 } 1181 1182 if (bufptr - buffer + tlen > buffer_allocated) 1183 { 1184 unsigned int bytes; 1185 1186 bytes = bufptr - buffer; 1187 buffer_allocated *= 2; 1188 buffer = xrealloc (buffer, buffer_allocated); 1189 bufptr = buffer + bytes; 1190 } 1191 1192 for (i = 0; i < tlen; i++) 1193 { 1194 *bufptr++ = buf[i + offset]; 1195 if (buf[i + offset] == '\000') 1196 { 1197 nbytes_read += i + 1; 1198 goto done; 1199 } 1200 } 1201 1202 memaddr += tlen; 1203 len -= tlen; 1204 nbytes_read += tlen; 1205 } 1206 done: 1207 *string = buffer; 1208 if (errnop != NULL) 1209 *errnop = errcode; 1210 return nbytes_read; 1211 } 1212 1213 struct target_section_table * 1214 target_get_section_table (struct target_ops *target) 1215 { 1216 struct target_ops *t; 1217 1218 if (targetdebug) 1219 fprintf_unfiltered (gdb_stdlog, "target_get_section_table ()\n"); 1220 1221 for (t = target; t != NULL; t = t->beneath) 1222 if (t->to_get_section_table != NULL) 1223 return (*t->to_get_section_table) (t); 1224 1225 return NULL; 1226 } 1227 1228 /* Find a section containing ADDR. */ 1229 1230 struct target_section * 1231 target_section_by_addr (struct target_ops *target, CORE_ADDR addr) 1232 { 1233 struct target_section_table *table = target_get_section_table (target); 1234 struct target_section *secp; 1235 1236 if (table == NULL) 1237 return NULL; 1238 1239 for (secp = table->sections; secp < table->sections_end; secp++) 1240 { 1241 if (addr >= secp->addr && addr < secp->endaddr) 1242 return secp; 1243 } 1244 return NULL; 1245 } 1246 1247 /* Perform a partial memory transfer. 1248 For docs see target.h, to_xfer_partial. */ 1249 1250 static LONGEST 1251 memory_xfer_partial (struct target_ops *ops, enum target_object object, 1252 void *readbuf, const void *writebuf, ULONGEST memaddr, 1253 LONGEST len) 1254 { 1255 LONGEST res; 1256 int reg_len; 1257 struct mem_region *region; 1258 struct inferior *inf; 1259 1260 /* Zero length requests are ok and require no work. */ 1261 if (len == 0) 1262 return 0; 1263 1264 /* For accesses to unmapped overlay sections, read directly from 1265 files. Must do this first, as MEMADDR may need adjustment. */ 1266 if (readbuf != NULL && overlay_debugging) 1267 { 1268 struct obj_section *section = find_pc_overlay (memaddr); 1269 1270 if (pc_in_unmapped_range (memaddr, section)) 1271 { 1272 struct target_section_table *table 1273 = target_get_section_table (ops); 1274 const char *section_name = section->the_bfd_section->name; 1275 1276 memaddr = overlay_mapped_address (memaddr, section); 1277 return section_table_xfer_memory_partial (readbuf, writebuf, 1278 memaddr, len, 1279 table->sections, 1280 table->sections_end, 1281 section_name); 1282 } 1283 } 1284 1285 /* Try the executable files, if "trust-readonly-sections" is set. */ 1286 if (readbuf != NULL && trust_readonly) 1287 { 1288 struct target_section *secp; 1289 struct target_section_table *table; 1290 1291 secp = target_section_by_addr (ops, memaddr); 1292 if (secp != NULL 1293 && (bfd_get_section_flags (secp->bfd, secp->the_bfd_section) 1294 & SEC_READONLY)) 1295 { 1296 table = target_get_section_table (ops); 1297 return section_table_xfer_memory_partial (readbuf, writebuf, 1298 memaddr, len, 1299 table->sections, 1300 table->sections_end, 1301 NULL); 1302 } 1303 } 1304 1305 /* Try GDB's internal data cache. */ 1306 region = lookup_mem_region (memaddr); 1307 /* region->hi == 0 means there's no upper bound. */ 1308 if (memaddr + len < region->hi || region->hi == 0) 1309 reg_len = len; 1310 else 1311 reg_len = region->hi - memaddr; 1312 1313 switch (region->attrib.mode) 1314 { 1315 case MEM_RO: 1316 if (writebuf != NULL) 1317 return -1; 1318 break; 1319 1320 case MEM_WO: 1321 if (readbuf != NULL) 1322 return -1; 1323 break; 1324 1325 case MEM_FLASH: 1326 /* We only support writing to flash during "load" for now. */ 1327 if (writebuf != NULL) 1328 error (_("Writing to flash memory forbidden in this context")); 1329 break; 1330 1331 case MEM_NONE: 1332 return -1; 1333 } 1334 1335 if (!ptid_equal (inferior_ptid, null_ptid)) 1336 inf = find_inferior_pid (ptid_get_pid (inferior_ptid)); 1337 else 1338 inf = NULL; 1339 1340 if (inf != NULL 1341 /* The dcache reads whole cache lines; that doesn't play well 1342 with reading from a trace buffer, because reading outside of 1343 the collected memory range fails. */ 1344 && get_traceframe_number () == -1 1345 && (region->attrib.cache 1346 || (stack_cache_enabled_p && object == TARGET_OBJECT_STACK_MEMORY))) 1347 { 1348 if (readbuf != NULL) 1349 res = dcache_xfer_memory (ops, target_dcache, memaddr, readbuf, 1350 reg_len, 0); 1351 else 1352 /* FIXME drow/2006-08-09: If we're going to preserve const 1353 correctness dcache_xfer_memory should take readbuf and 1354 writebuf. */ 1355 res = dcache_xfer_memory (ops, target_dcache, memaddr, 1356 (void *) writebuf, 1357 reg_len, 1); 1358 if (res <= 0) 1359 return -1; 1360 else 1361 { 1362 if (readbuf && !show_memory_breakpoints) 1363 breakpoint_restore_shadows (readbuf, memaddr, reg_len); 1364 return res; 1365 } 1366 } 1367 1368 /* If none of those methods found the memory we wanted, fall back 1369 to a target partial transfer. Normally a single call to 1370 to_xfer_partial is enough; if it doesn't recognize an object 1371 it will call the to_xfer_partial of the next target down. 1372 But for memory this won't do. Memory is the only target 1373 object which can be read from more than one valid target. 1374 A core file, for instance, could have some of memory but 1375 delegate other bits to the target below it. So, we must 1376 manually try all targets. */ 1377 1378 do 1379 { 1380 res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, 1381 readbuf, writebuf, memaddr, reg_len); 1382 if (res > 0) 1383 break; 1384 1385 /* We want to continue past core files to executables, but not 1386 past a running target's memory. */ 1387 if (ops->to_has_all_memory (ops)) 1388 break; 1389 1390 ops = ops->beneath; 1391 } 1392 while (ops != NULL); 1393 1394 if (readbuf && !show_memory_breakpoints) 1395 breakpoint_restore_shadows (readbuf, memaddr, reg_len); 1396 1397 /* Make sure the cache gets updated no matter what - if we are writing 1398 to the stack. Even if this write is not tagged as such, we still need 1399 to update the cache. */ 1400 1401 if (res > 0 1402 && inf != NULL 1403 && writebuf != NULL 1404 && !region->attrib.cache 1405 && stack_cache_enabled_p 1406 && object != TARGET_OBJECT_STACK_MEMORY) 1407 { 1408 dcache_update (target_dcache, memaddr, (void *) writebuf, res); 1409 } 1410 1411 /* If we still haven't got anything, return the last error. We 1412 give up. */ 1413 return res; 1414 } 1415 1416 static void 1417 restore_show_memory_breakpoints (void *arg) 1418 { 1419 show_memory_breakpoints = (uintptr_t) arg; 1420 } 1421 1422 struct cleanup * 1423 make_show_memory_breakpoints_cleanup (int show) 1424 { 1425 int current = show_memory_breakpoints; 1426 1427 show_memory_breakpoints = show; 1428 return make_cleanup (restore_show_memory_breakpoints, 1429 (void *) (uintptr_t) current); 1430 } 1431 1432 /* For docs see target.h, to_xfer_partial. */ 1433 1434 static LONGEST 1435 target_xfer_partial (struct target_ops *ops, 1436 enum target_object object, const char *annex, 1437 void *readbuf, const void *writebuf, 1438 ULONGEST offset, LONGEST len) 1439 { 1440 LONGEST retval; 1441 1442 gdb_assert (ops->to_xfer_partial != NULL); 1443 1444 if (writebuf && !may_write_memory) 1445 error (_("Writing to memory is not allowed (addr %s, len %s)"), 1446 core_addr_to_string_nz (offset), plongest (len)); 1447 1448 /* If this is a memory transfer, let the memory-specific code 1449 have a look at it instead. Memory transfers are more 1450 complicated. */ 1451 if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY) 1452 retval = memory_xfer_partial (ops, object, readbuf, 1453 writebuf, offset, len); 1454 else 1455 { 1456 enum target_object raw_object = object; 1457 1458 /* If this is a raw memory transfer, request the normal 1459 memory object from other layers. */ 1460 if (raw_object == TARGET_OBJECT_RAW_MEMORY) 1461 raw_object = TARGET_OBJECT_MEMORY; 1462 1463 retval = ops->to_xfer_partial (ops, raw_object, annex, readbuf, 1464 writebuf, offset, len); 1465 } 1466 1467 if (targetdebug) 1468 { 1469 const unsigned char *myaddr = NULL; 1470 1471 fprintf_unfiltered (gdb_stdlog, 1472 "%s:target_xfer_partial (%d, %s, %s, %s, %s, %s) = %s", 1473 ops->to_shortname, 1474 (int) object, 1475 (annex ? annex : "(null)"), 1476 host_address_to_string (readbuf), 1477 host_address_to_string (writebuf), 1478 core_addr_to_string_nz (offset), 1479 plongest (len), plongest (retval)); 1480 1481 if (readbuf) 1482 myaddr = readbuf; 1483 if (writebuf) 1484 myaddr = writebuf; 1485 if (retval > 0 && myaddr != NULL) 1486 { 1487 int i; 1488 1489 fputs_unfiltered (", bytes =", gdb_stdlog); 1490 for (i = 0; i < retval; i++) 1491 { 1492 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) 1493 { 1494 if (targetdebug < 2 && i > 0) 1495 { 1496 fprintf_unfiltered (gdb_stdlog, " ..."); 1497 break; 1498 } 1499 fprintf_unfiltered (gdb_stdlog, "\n"); 1500 } 1501 1502 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); 1503 } 1504 } 1505 1506 fputc_unfiltered ('\n', gdb_stdlog); 1507 } 1508 return retval; 1509 } 1510 1511 /* Read LEN bytes of target memory at address MEMADDR, placing the results in 1512 GDB's memory at MYADDR. Returns either 0 for success or an errno value 1513 if any error occurs. 1514 1515 If an error occurs, no guarantee is made about the contents of the data at 1516 MYADDR. In particular, the caller should not depend upon partial reads 1517 filling the buffer with good data. There is no way for the caller to know 1518 how much good data might have been transfered anyway. Callers that can 1519 deal with partial reads should call target_read (which will retry until 1520 it makes no progress, and then return how much was transferred). */ 1521 1522 int 1523 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len) 1524 { 1525 /* Dispatch to the topmost target, not the flattened current_target. 1526 Memory accesses check target->to_has_(all_)memory, and the 1527 flattened target doesn't inherit those. */ 1528 if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, 1529 myaddr, memaddr, len) == len) 1530 return 0; 1531 else 1532 return EIO; 1533 } 1534 1535 /* Like target_read_memory, but specify explicitly that this is a read from 1536 the target's stack. This may trigger different cache behavior. */ 1537 1538 int 1539 target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, int len) 1540 { 1541 /* Dispatch to the topmost target, not the flattened current_target. 1542 Memory accesses check target->to_has_(all_)memory, and the 1543 flattened target doesn't inherit those. */ 1544 1545 if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL, 1546 myaddr, memaddr, len) == len) 1547 return 0; 1548 else 1549 return EIO; 1550 } 1551 1552 /* Write LEN bytes from MYADDR to target memory at address MEMADDR. 1553 Returns either 0 for success or an errno value if any error occurs. 1554 If an error occurs, no guarantee is made about how much data got written. 1555 Callers that can deal with partial writes should call target_write. */ 1556 1557 int 1558 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, int len) 1559 { 1560 /* Dispatch to the topmost target, not the flattened current_target. 1561 Memory accesses check target->to_has_(all_)memory, and the 1562 flattened target doesn't inherit those. */ 1563 if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, 1564 myaddr, memaddr, len) == len) 1565 return 0; 1566 else 1567 return EIO; 1568 } 1569 1570 /* Fetch the target's memory map. */ 1571 1572 VEC(mem_region_s) * 1573 target_memory_map (void) 1574 { 1575 VEC(mem_region_s) *result; 1576 struct mem_region *last_one, *this_one; 1577 int ix; 1578 struct target_ops *t; 1579 1580 if (targetdebug) 1581 fprintf_unfiltered (gdb_stdlog, "target_memory_map ()\n"); 1582 1583 for (t = current_target.beneath; t != NULL; t = t->beneath) 1584 if (t->to_memory_map != NULL) 1585 break; 1586 1587 if (t == NULL) 1588 return NULL; 1589 1590 result = t->to_memory_map (t); 1591 if (result == NULL) 1592 return NULL; 1593 1594 qsort (VEC_address (mem_region_s, result), 1595 VEC_length (mem_region_s, result), 1596 sizeof (struct mem_region), mem_region_cmp); 1597 1598 /* Check that regions do not overlap. Simultaneously assign 1599 a numbering for the "mem" commands to use to refer to 1600 each region. */ 1601 last_one = NULL; 1602 for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++) 1603 { 1604 this_one->number = ix; 1605 1606 if (last_one && last_one->hi > this_one->lo) 1607 { 1608 warning (_("Overlapping regions in memory map: ignoring")); 1609 VEC_free (mem_region_s, result); 1610 return NULL; 1611 } 1612 last_one = this_one; 1613 } 1614 1615 return result; 1616 } 1617 1618 void 1619 target_flash_erase (ULONGEST address, LONGEST length) 1620 { 1621 struct target_ops *t; 1622 1623 for (t = current_target.beneath; t != NULL; t = t->beneath) 1624 if (t->to_flash_erase != NULL) 1625 { 1626 if (targetdebug) 1627 fprintf_unfiltered (gdb_stdlog, "target_flash_erase (%s, %s)\n", 1628 hex_string (address), phex (length, 0)); 1629 t->to_flash_erase (t, address, length); 1630 return; 1631 } 1632 1633 tcomplain (); 1634 } 1635 1636 void 1637 target_flash_done (void) 1638 { 1639 struct target_ops *t; 1640 1641 for (t = current_target.beneath; t != NULL; t = t->beneath) 1642 if (t->to_flash_done != NULL) 1643 { 1644 if (targetdebug) 1645 fprintf_unfiltered (gdb_stdlog, "target_flash_done\n"); 1646 t->to_flash_done (t); 1647 return; 1648 } 1649 1650 tcomplain (); 1651 } 1652 1653 static void 1654 show_trust_readonly (struct ui_file *file, int from_tty, 1655 struct cmd_list_element *c, const char *value) 1656 { 1657 fprintf_filtered (file, _("\ 1658 Mode for reading from readonly sections is %s.\n"), 1659 value); 1660 } 1661 1662 /* More generic transfers. */ 1663 1664 static LONGEST 1665 default_xfer_partial (struct target_ops *ops, enum target_object object, 1666 const char *annex, gdb_byte *readbuf, 1667 const gdb_byte *writebuf, ULONGEST offset, LONGEST len) 1668 { 1669 if (object == TARGET_OBJECT_MEMORY 1670 && ops->deprecated_xfer_memory != NULL) 1671 /* If available, fall back to the target's 1672 "deprecated_xfer_memory" method. */ 1673 { 1674 int xfered = -1; 1675 1676 errno = 0; 1677 if (writebuf != NULL) 1678 { 1679 void *buffer = xmalloc (len); 1680 struct cleanup *cleanup = make_cleanup (xfree, buffer); 1681 1682 memcpy (buffer, writebuf, len); 1683 xfered = ops->deprecated_xfer_memory (offset, buffer, len, 1684 1/*write*/, NULL, ops); 1685 do_cleanups (cleanup); 1686 } 1687 if (readbuf != NULL) 1688 xfered = ops->deprecated_xfer_memory (offset, readbuf, len, 1689 0/*read*/, NULL, ops); 1690 if (xfered > 0) 1691 return xfered; 1692 else if (xfered == 0 && errno == 0) 1693 /* "deprecated_xfer_memory" uses 0, cross checked against 1694 ERRNO as one indication of an error. */ 1695 return 0; 1696 else 1697 return -1; 1698 } 1699 else if (ops->beneath != NULL) 1700 return ops->beneath->to_xfer_partial (ops->beneath, object, annex, 1701 readbuf, writebuf, offset, len); 1702 else 1703 return -1; 1704 } 1705 1706 /* The xfer_partial handler for the topmost target. Unlike the default, 1707 it does not need to handle memory specially; it just passes all 1708 requests down the stack. */ 1709 1710 static LONGEST 1711 current_xfer_partial (struct target_ops *ops, enum target_object object, 1712 const char *annex, gdb_byte *readbuf, 1713 const gdb_byte *writebuf, ULONGEST offset, LONGEST len) 1714 { 1715 if (ops->beneath != NULL) 1716 return ops->beneath->to_xfer_partial (ops->beneath, object, annex, 1717 readbuf, writebuf, offset, len); 1718 else 1719 return -1; 1720 } 1721 1722 /* Target vector read/write partial wrapper functions. */ 1723 1724 static LONGEST 1725 target_read_partial (struct target_ops *ops, 1726 enum target_object object, 1727 const char *annex, gdb_byte *buf, 1728 ULONGEST offset, LONGEST len) 1729 { 1730 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len); 1731 } 1732 1733 static LONGEST 1734 target_write_partial (struct target_ops *ops, 1735 enum target_object object, 1736 const char *annex, const gdb_byte *buf, 1737 ULONGEST offset, LONGEST len) 1738 { 1739 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len); 1740 } 1741 1742 /* Wrappers to perform the full transfer. */ 1743 1744 /* For docs on target_read see target.h. */ 1745 1746 LONGEST 1747 target_read (struct target_ops *ops, 1748 enum target_object object, 1749 const char *annex, gdb_byte *buf, 1750 ULONGEST offset, LONGEST len) 1751 { 1752 LONGEST xfered = 0; 1753 1754 while (xfered < len) 1755 { 1756 LONGEST xfer = target_read_partial (ops, object, annex, 1757 (gdb_byte *) buf + xfered, 1758 offset + xfered, len - xfered); 1759 1760 /* Call an observer, notifying them of the xfer progress? */ 1761 if (xfer == 0) 1762 return xfered; 1763 if (xfer < 0) 1764 return -1; 1765 xfered += xfer; 1766 QUIT; 1767 } 1768 return len; 1769 } 1770 1771 LONGEST 1772 target_read_until_error (struct target_ops *ops, 1773 enum target_object object, 1774 const char *annex, gdb_byte *buf, 1775 ULONGEST offset, LONGEST len) 1776 { 1777 LONGEST xfered = 0; 1778 1779 while (xfered < len) 1780 { 1781 LONGEST xfer = target_read_partial (ops, object, annex, 1782 (gdb_byte *) buf + xfered, 1783 offset + xfered, len - xfered); 1784 1785 /* Call an observer, notifying them of the xfer progress? */ 1786 if (xfer == 0) 1787 return xfered; 1788 if (xfer < 0) 1789 { 1790 /* We've got an error. Try to read in smaller blocks. */ 1791 ULONGEST start = offset + xfered; 1792 ULONGEST remaining = len - xfered; 1793 ULONGEST half; 1794 1795 /* If an attempt was made to read a random memory address, 1796 it's likely that the very first byte is not accessible. 1797 Try reading the first byte, to avoid doing log N tries 1798 below. */ 1799 xfer = target_read_partial (ops, object, annex, 1800 (gdb_byte *) buf + xfered, start, 1); 1801 if (xfer <= 0) 1802 return xfered; 1803 start += 1; 1804 remaining -= 1; 1805 half = remaining/2; 1806 1807 while (half > 0) 1808 { 1809 xfer = target_read_partial (ops, object, annex, 1810 (gdb_byte *) buf + xfered, 1811 start, half); 1812 if (xfer == 0) 1813 return xfered; 1814 if (xfer < 0) 1815 { 1816 remaining = half; 1817 } 1818 else 1819 { 1820 /* We have successfully read the first half. So, the 1821 error must be in the second half. Adjust start and 1822 remaining to point at the second half. */ 1823 xfered += xfer; 1824 start += xfer; 1825 remaining -= xfer; 1826 } 1827 half = remaining/2; 1828 } 1829 1830 return xfered; 1831 } 1832 xfered += xfer; 1833 QUIT; 1834 } 1835 return len; 1836 } 1837 1838 /* An alternative to target_write with progress callbacks. */ 1839 1840 LONGEST 1841 target_write_with_progress (struct target_ops *ops, 1842 enum target_object object, 1843 const char *annex, const gdb_byte *buf, 1844 ULONGEST offset, LONGEST len, 1845 void (*progress) (ULONGEST, void *), void *baton) 1846 { 1847 LONGEST xfered = 0; 1848 1849 /* Give the progress callback a chance to set up. */ 1850 if (progress) 1851 (*progress) (0, baton); 1852 1853 while (xfered < len) 1854 { 1855 LONGEST xfer = target_write_partial (ops, object, annex, 1856 (gdb_byte *) buf + xfered, 1857 offset + xfered, len - xfered); 1858 1859 if (xfer == 0) 1860 return xfered; 1861 if (xfer < 0) 1862 return -1; 1863 1864 if (progress) 1865 (*progress) (xfer, baton); 1866 1867 xfered += xfer; 1868 QUIT; 1869 } 1870 return len; 1871 } 1872 1873 /* For docs on target_write see target.h. */ 1874 1875 LONGEST 1876 target_write (struct target_ops *ops, 1877 enum target_object object, 1878 const char *annex, const gdb_byte *buf, 1879 ULONGEST offset, LONGEST len) 1880 { 1881 return target_write_with_progress (ops, object, annex, buf, offset, len, 1882 NULL, NULL); 1883 } 1884 1885 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return 1886 the size of the transferred data. PADDING additional bytes are 1887 available in *BUF_P. This is a helper function for 1888 target_read_alloc; see the declaration of that function for more 1889 information. */ 1890 1891 static LONGEST 1892 target_read_alloc_1 (struct target_ops *ops, enum target_object object, 1893 const char *annex, gdb_byte **buf_p, int padding) 1894 { 1895 size_t buf_alloc, buf_pos; 1896 gdb_byte *buf; 1897 LONGEST n; 1898 1899 /* This function does not have a length parameter; it reads the 1900 entire OBJECT). Also, it doesn't support objects fetched partly 1901 from one target and partly from another (in a different stratum, 1902 e.g. a core file and an executable). Both reasons make it 1903 unsuitable for reading memory. */ 1904 gdb_assert (object != TARGET_OBJECT_MEMORY); 1905 1906 /* Start by reading up to 4K at a time. The target will throttle 1907 this number down if necessary. */ 1908 buf_alloc = 4096; 1909 buf = xmalloc (buf_alloc); 1910 buf_pos = 0; 1911 while (1) 1912 { 1913 n = target_read_partial (ops, object, annex, &buf[buf_pos], 1914 buf_pos, buf_alloc - buf_pos - padding); 1915 if (n < 0) 1916 { 1917 /* An error occurred. */ 1918 xfree (buf); 1919 return -1; 1920 } 1921 else if (n == 0) 1922 { 1923 /* Read all there was. */ 1924 if (buf_pos == 0) 1925 xfree (buf); 1926 else 1927 *buf_p = buf; 1928 return buf_pos; 1929 } 1930 1931 buf_pos += n; 1932 1933 /* If the buffer is filling up, expand it. */ 1934 if (buf_alloc < buf_pos * 2) 1935 { 1936 buf_alloc *= 2; 1937 buf = xrealloc (buf, buf_alloc); 1938 } 1939 1940 QUIT; 1941 } 1942 } 1943 1944 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return 1945 the size of the transferred data. See the declaration in "target.h" 1946 function for more information about the return value. */ 1947 1948 LONGEST 1949 target_read_alloc (struct target_ops *ops, enum target_object object, 1950 const char *annex, gdb_byte **buf_p) 1951 { 1952 return target_read_alloc_1 (ops, object, annex, buf_p, 0); 1953 } 1954 1955 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and 1956 returned as a string, allocated using xmalloc. If an error occurs 1957 or the transfer is unsupported, NULL is returned. Empty objects 1958 are returned as allocated but empty strings. A warning is issued 1959 if the result contains any embedded NUL bytes. */ 1960 1961 char * 1962 target_read_stralloc (struct target_ops *ops, enum target_object object, 1963 const char *annex) 1964 { 1965 gdb_byte *buffer; 1966 LONGEST transferred; 1967 1968 transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1); 1969 1970 if (transferred < 0) 1971 return NULL; 1972 1973 if (transferred == 0) 1974 return xstrdup (""); 1975 1976 buffer[transferred] = 0; 1977 if (strlen (buffer) < transferred) 1978 warning (_("target object %d, annex %s, " 1979 "contained unexpected null characters"), 1980 (int) object, annex ? annex : "(none)"); 1981 1982 return (char *) buffer; 1983 } 1984 1985 /* Memory transfer methods. */ 1986 1987 void 1988 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, 1989 LONGEST len) 1990 { 1991 /* This method is used to read from an alternate, non-current 1992 target. This read must bypass the overlay support (as symbols 1993 don't match this target), and GDB's internal cache (wrong cache 1994 for this target). */ 1995 if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) 1996 != len) 1997 memory_error (EIO, addr); 1998 } 1999 2000 ULONGEST 2001 get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, 2002 int len, enum bfd_endian byte_order) 2003 { 2004 gdb_byte buf[sizeof (ULONGEST)]; 2005 2006 gdb_assert (len <= sizeof (buf)); 2007 get_target_memory (ops, addr, buf, len); 2008 return extract_unsigned_integer (buf, len, byte_order); 2009 } 2010 2011 int 2012 target_insert_breakpoint (struct gdbarch *gdbarch, 2013 struct bp_target_info *bp_tgt) 2014 { 2015 if (!may_insert_breakpoints) 2016 { 2017 warning (_("May not insert breakpoints")); 2018 return 1; 2019 } 2020 2021 return (*current_target.to_insert_breakpoint) (gdbarch, bp_tgt); 2022 } 2023 2024 int 2025 target_remove_breakpoint (struct gdbarch *gdbarch, 2026 struct bp_target_info *bp_tgt) 2027 { 2028 /* This is kind of a weird case to handle, but the permission might 2029 have been changed after breakpoints were inserted - in which case 2030 we should just take the user literally and assume that any 2031 breakpoints should be left in place. */ 2032 if (!may_insert_breakpoints) 2033 { 2034 warning (_("May not remove breakpoints")); 2035 return 1; 2036 } 2037 2038 return (*current_target.to_remove_breakpoint) (gdbarch, bp_tgt); 2039 } 2040 2041 static void 2042 target_info (char *args, int from_tty) 2043 { 2044 struct target_ops *t; 2045 int has_all_mem = 0; 2046 2047 if (symfile_objfile != NULL) 2048 printf_unfiltered (_("Symbols from \"%s\".\n"), symfile_objfile->name); 2049 2050 for (t = target_stack; t != NULL; t = t->beneath) 2051 { 2052 if (!(*t->to_has_memory) (t)) 2053 continue; 2054 2055 if ((int) (t->to_stratum) <= (int) dummy_stratum) 2056 continue; 2057 if (has_all_mem) 2058 printf_unfiltered (_("\tWhile running this, GDB does not access memory from...\n")); 2059 printf_unfiltered ("%s:\n", t->to_longname); 2060 (t->to_files_info) (t); 2061 has_all_mem = (*t->to_has_all_memory) (t); 2062 } 2063 } 2064 2065 /* This function is called before any new inferior is created, e.g. 2066 by running a program, attaching, or connecting to a target. 2067 It cleans up any state from previous invocations which might 2068 change between runs. This is a subset of what target_preopen 2069 resets (things which might change between targets). */ 2070 2071 void 2072 target_pre_inferior (int from_tty) 2073 { 2074 /* Clear out solib state. Otherwise the solib state of the previous 2075 inferior might have survived and is entirely wrong for the new 2076 target. This has been observed on GNU/Linux using glibc 2.3. How 2077 to reproduce: 2078 2079 bash$ ./foo& 2080 [1] 4711 2081 bash$ ./foo& 2082 [1] 4712 2083 bash$ gdb ./foo 2084 [...] 2085 (gdb) attach 4711 2086 (gdb) detach 2087 (gdb) attach 4712 2088 Cannot access memory at address 0xdeadbeef 2089 */ 2090 2091 /* In some OSs, the shared library list is the same/global/shared 2092 across inferiors. If code is shared between processes, so are 2093 memory regions and features. */ 2094 if (!gdbarch_has_global_solist (target_gdbarch)) 2095 { 2096 no_shared_libraries (NULL, from_tty); 2097 2098 invalidate_target_mem_regions (); 2099 2100 target_clear_description (); 2101 } 2102 } 2103 2104 /* Callback for iterate_over_inferiors. Gets rid of the given 2105 inferior. */ 2106 2107 static int 2108 dispose_inferior (struct inferior *inf, void *args) 2109 { 2110 struct thread_info *thread; 2111 2112 thread = any_thread_of_process (inf->pid); 2113 if (thread) 2114 { 2115 switch_to_thread (thread->ptid); 2116 2117 /* Core inferiors actually should be detached, not killed. */ 2118 if (target_has_execution) 2119 target_kill (); 2120 else 2121 target_detach (NULL, 0); 2122 } 2123 2124 return 0; 2125 } 2126 2127 /* This is to be called by the open routine before it does 2128 anything. */ 2129 2130 void 2131 target_preopen (int from_tty) 2132 { 2133 dont_repeat (); 2134 2135 if (have_inferiors ()) 2136 { 2137 if (!from_tty 2138 || !have_live_inferiors () 2139 || query (_("A program is being debugged already. Kill it? "))) 2140 iterate_over_inferiors (dispose_inferior, NULL); 2141 else 2142 error (_("Program not killed.")); 2143 } 2144 2145 /* Calling target_kill may remove the target from the stack. But if 2146 it doesn't (which seems like a win for UDI), remove it now. */ 2147 /* Leave the exec target, though. The user may be switching from a 2148 live process to a core of the same program. */ 2149 pop_all_targets_above (file_stratum, 0); 2150 2151 target_pre_inferior (from_tty); 2152 } 2153 2154 /* Detach a target after doing deferred register stores. */ 2155 2156 void 2157 target_detach (char *args, int from_tty) 2158 { 2159 struct target_ops* t; 2160 2161 if (gdbarch_has_global_breakpoints (target_gdbarch)) 2162 /* Don't remove global breakpoints here. They're removed on 2163 disconnection from the target. */ 2164 ; 2165 else 2166 /* If we're in breakpoints-always-inserted mode, have to remove 2167 them before detaching. */ 2168 remove_breakpoints_pid (PIDGET (inferior_ptid)); 2169 2170 prepare_for_detach (); 2171 2172 for (t = current_target.beneath; t != NULL; t = t->beneath) 2173 { 2174 if (t->to_detach != NULL) 2175 { 2176 t->to_detach (t, args, from_tty); 2177 if (targetdebug) 2178 fprintf_unfiltered (gdb_stdlog, "target_detach (%s, %d)\n", 2179 args, from_tty); 2180 return; 2181 } 2182 } 2183 2184 internal_error (__FILE__, __LINE__, "could not find a target to detach"); 2185 } 2186 2187 void 2188 target_disconnect (char *args, int from_tty) 2189 { 2190 struct target_ops *t; 2191 2192 /* If we're in breakpoints-always-inserted mode or if breakpoints 2193 are global across processes, we have to remove them before 2194 disconnecting. */ 2195 remove_breakpoints (); 2196 2197 for (t = current_target.beneath; t != NULL; t = t->beneath) 2198 if (t->to_disconnect != NULL) 2199 { 2200 if (targetdebug) 2201 fprintf_unfiltered (gdb_stdlog, "target_disconnect (%s, %d)\n", 2202 args, from_tty); 2203 t->to_disconnect (t, args, from_tty); 2204 return; 2205 } 2206 2207 tcomplain (); 2208 } 2209 2210 ptid_t 2211 target_wait (ptid_t ptid, struct target_waitstatus *status, int options) 2212 { 2213 struct target_ops *t; 2214 2215 for (t = current_target.beneath; t != NULL; t = t->beneath) 2216 { 2217 if (t->to_wait != NULL) 2218 { 2219 ptid_t retval = (*t->to_wait) (t, ptid, status, options); 2220 2221 if (targetdebug) 2222 { 2223 char *status_string; 2224 2225 status_string = target_waitstatus_to_string (status); 2226 fprintf_unfiltered (gdb_stdlog, 2227 "target_wait (%d, status) = %d, %s\n", 2228 PIDGET (ptid), PIDGET (retval), 2229 status_string); 2230 xfree (status_string); 2231 } 2232 2233 return retval; 2234 } 2235 } 2236 2237 noprocess (); 2238 } 2239 2240 char * 2241 target_pid_to_str (ptid_t ptid) 2242 { 2243 struct target_ops *t; 2244 2245 for (t = current_target.beneath; t != NULL; t = t->beneath) 2246 { 2247 if (t->to_pid_to_str != NULL) 2248 return (*t->to_pid_to_str) (t, ptid); 2249 } 2250 2251 return normal_pid_to_str (ptid); 2252 } 2253 2254 void 2255 target_resume (ptid_t ptid, int step, enum target_signal signal) 2256 { 2257 struct target_ops *t; 2258 2259 target_dcache_invalidate (); 2260 2261 for (t = current_target.beneath; t != NULL; t = t->beneath) 2262 { 2263 if (t->to_resume != NULL) 2264 { 2265 t->to_resume (t, ptid, step, signal); 2266 if (targetdebug) 2267 fprintf_unfiltered (gdb_stdlog, "target_resume (%d, %s, %s)\n", 2268 PIDGET (ptid), 2269 step ? "step" : "continue", 2270 target_signal_to_name (signal)); 2271 2272 registers_changed_ptid (ptid); 2273 set_executing (ptid, 1); 2274 set_running (ptid, 1); 2275 clear_inline_frame_state (ptid); 2276 return; 2277 } 2278 } 2279 2280 noprocess (); 2281 } 2282 /* Look through the list of possible targets for a target that can 2283 follow forks. */ 2284 2285 int 2286 target_follow_fork (int follow_child) 2287 { 2288 struct target_ops *t; 2289 2290 for (t = current_target.beneath; t != NULL; t = t->beneath) 2291 { 2292 if (t->to_follow_fork != NULL) 2293 { 2294 int retval = t->to_follow_fork (t, follow_child); 2295 2296 if (targetdebug) 2297 fprintf_unfiltered (gdb_stdlog, "target_follow_fork (%d) = %d\n", 2298 follow_child, retval); 2299 return retval; 2300 } 2301 } 2302 2303 /* Some target returned a fork event, but did not know how to follow it. */ 2304 internal_error (__FILE__, __LINE__, 2305 "could not find a target to follow fork"); 2306 } 2307 2308 void 2309 target_mourn_inferior (void) 2310 { 2311 struct target_ops *t; 2312 2313 for (t = current_target.beneath; t != NULL; t = t->beneath) 2314 { 2315 if (t->to_mourn_inferior != NULL) 2316 { 2317 t->to_mourn_inferior (t); 2318 if (targetdebug) 2319 fprintf_unfiltered (gdb_stdlog, "target_mourn_inferior ()\n"); 2320 2321 /* We no longer need to keep handles on any of the object files. 2322 Make sure to release them to avoid unnecessarily locking any 2323 of them while we're not actually debugging. */ 2324 bfd_cache_close_all (); 2325 2326 return; 2327 } 2328 } 2329 2330 internal_error (__FILE__, __LINE__, 2331 "could not find a target to follow mourn inferior"); 2332 } 2333 2334 /* Look for a target which can describe architectural features, starting 2335 from TARGET. If we find one, return its description. */ 2336 2337 const struct target_desc * 2338 target_read_description (struct target_ops *target) 2339 { 2340 struct target_ops *t; 2341 2342 for (t = target; t != NULL; t = t->beneath) 2343 if (t->to_read_description != NULL) 2344 { 2345 const struct target_desc *tdesc; 2346 2347 tdesc = t->to_read_description (t); 2348 if (tdesc) 2349 return tdesc; 2350 } 2351 2352 return NULL; 2353 } 2354 2355 /* The default implementation of to_search_memory. 2356 This implements a basic search of memory, reading target memory and 2357 performing the search here (as opposed to performing the search in on the 2358 target side with, for example, gdbserver). */ 2359 2360 int 2361 simple_search_memory (struct target_ops *ops, 2362 CORE_ADDR start_addr, ULONGEST search_space_len, 2363 const gdb_byte *pattern, ULONGEST pattern_len, 2364 CORE_ADDR *found_addrp) 2365 { 2366 /* NOTE: also defined in find.c testcase. */ 2367 #define SEARCH_CHUNK_SIZE 16000 2368 const unsigned chunk_size = SEARCH_CHUNK_SIZE; 2369 /* Buffer to hold memory contents for searching. */ 2370 gdb_byte *search_buf; 2371 unsigned search_buf_size; 2372 struct cleanup *old_cleanups; 2373 2374 search_buf_size = chunk_size + pattern_len - 1; 2375 2376 /* No point in trying to allocate a buffer larger than the search space. */ 2377 if (search_space_len < search_buf_size) 2378 search_buf_size = search_space_len; 2379 2380 search_buf = malloc (search_buf_size); 2381 if (search_buf == NULL) 2382 error (_("Unable to allocate memory to perform the search.")); 2383 old_cleanups = make_cleanup (free_current_contents, &search_buf); 2384 2385 /* Prime the search buffer. */ 2386 2387 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, 2388 search_buf, start_addr, search_buf_size) != search_buf_size) 2389 { 2390 warning (_("Unable to access target memory at %s, halting search."), 2391 hex_string (start_addr)); 2392 do_cleanups (old_cleanups); 2393 return -1; 2394 } 2395 2396 /* Perform the search. 2397 2398 The loop is kept simple by allocating [N + pattern-length - 1] bytes. 2399 When we've scanned N bytes we copy the trailing bytes to the start and 2400 read in another N bytes. */ 2401 2402 while (search_space_len >= pattern_len) 2403 { 2404 gdb_byte *found_ptr; 2405 unsigned nr_search_bytes = min (search_space_len, search_buf_size); 2406 2407 found_ptr = memmem (search_buf, nr_search_bytes, 2408 pattern, pattern_len); 2409 2410 if (found_ptr != NULL) 2411 { 2412 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf); 2413 2414 *found_addrp = found_addr; 2415 do_cleanups (old_cleanups); 2416 return 1; 2417 } 2418 2419 /* Not found in this chunk, skip to next chunk. */ 2420 2421 /* Don't let search_space_len wrap here, it's unsigned. */ 2422 if (search_space_len >= chunk_size) 2423 search_space_len -= chunk_size; 2424 else 2425 search_space_len = 0; 2426 2427 if (search_space_len >= pattern_len) 2428 { 2429 unsigned keep_len = search_buf_size - chunk_size; 2430 CORE_ADDR read_addr = start_addr + chunk_size + keep_len; 2431 int nr_to_read; 2432 2433 /* Copy the trailing part of the previous iteration to the front 2434 of the buffer for the next iteration. */ 2435 gdb_assert (keep_len == pattern_len - 1); 2436 memcpy (search_buf, search_buf + chunk_size, keep_len); 2437 2438 nr_to_read = min (search_space_len - keep_len, chunk_size); 2439 2440 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, 2441 search_buf + keep_len, read_addr, 2442 nr_to_read) != nr_to_read) 2443 { 2444 warning (_("Unable to access target memory at %s, halting search."), 2445 hex_string (read_addr)); 2446 do_cleanups (old_cleanups); 2447 return -1; 2448 } 2449 2450 start_addr += chunk_size; 2451 } 2452 } 2453 2454 /* Not found. */ 2455 2456 do_cleanups (old_cleanups); 2457 return 0; 2458 } 2459 2460 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the 2461 sequence of bytes in PATTERN with length PATTERN_LEN. 2462 2463 The result is 1 if found, 0 if not found, and -1 if there was an error 2464 requiring halting of the search (e.g. memory read error). 2465 If the pattern is found the address is recorded in FOUND_ADDRP. */ 2466 2467 int 2468 target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, 2469 const gdb_byte *pattern, ULONGEST pattern_len, 2470 CORE_ADDR *found_addrp) 2471 { 2472 struct target_ops *t; 2473 int found; 2474 2475 /* We don't use INHERIT to set current_target.to_search_memory, 2476 so we have to scan the target stack and handle targetdebug 2477 ourselves. */ 2478 2479 if (targetdebug) 2480 fprintf_unfiltered (gdb_stdlog, "target_search_memory (%s, ...)\n", 2481 hex_string (start_addr)); 2482 2483 for (t = current_target.beneath; t != NULL; t = t->beneath) 2484 if (t->to_search_memory != NULL) 2485 break; 2486 2487 if (t != NULL) 2488 { 2489 found = t->to_search_memory (t, start_addr, search_space_len, 2490 pattern, pattern_len, found_addrp); 2491 } 2492 else 2493 { 2494 /* If a special version of to_search_memory isn't available, use the 2495 simple version. */ 2496 found = simple_search_memory (current_target.beneath, 2497 start_addr, search_space_len, 2498 pattern, pattern_len, found_addrp); 2499 } 2500 2501 if (targetdebug) 2502 fprintf_unfiltered (gdb_stdlog, " = %d\n", found); 2503 2504 return found; 2505 } 2506 2507 /* Look through the currently pushed targets. If none of them will 2508 be able to restart the currently running process, issue an error 2509 message. */ 2510 2511 void 2512 target_require_runnable (void) 2513 { 2514 struct target_ops *t; 2515 2516 for (t = target_stack; t != NULL; t = t->beneath) 2517 { 2518 /* If this target knows how to create a new program, then 2519 assume we will still be able to after killing the current 2520 one. Either killing and mourning will not pop T, or else 2521 find_default_run_target will find it again. */ 2522 if (t->to_create_inferior != NULL) 2523 return; 2524 2525 /* Do not worry about thread_stratum targets that can not 2526 create inferiors. Assume they will be pushed again if 2527 necessary, and continue to the process_stratum. */ 2528 if (t->to_stratum == thread_stratum 2529 || t->to_stratum == arch_stratum) 2530 continue; 2531 2532 error (_("\ 2533 The \"%s\" target does not support \"run\". Try \"help target\" or \"continue\"."), 2534 t->to_shortname); 2535 } 2536 2537 /* This function is only called if the target is running. In that 2538 case there should have been a process_stratum target and it 2539 should either know how to create inferiors, or not... */ 2540 internal_error (__FILE__, __LINE__, "No targets found"); 2541 } 2542 2543 /* Look through the list of possible targets for a target that can 2544 execute a run or attach command without any other data. This is 2545 used to locate the default process stratum. 2546 2547 If DO_MESG is not NULL, the result is always valid (error() is 2548 called for errors); else, return NULL on error. */ 2549 2550 static struct target_ops * 2551 find_default_run_target (char *do_mesg) 2552 { 2553 struct target_ops **t; 2554 struct target_ops *runable = NULL; 2555 int count; 2556 2557 count = 0; 2558 2559 for (t = target_structs; t < target_structs + target_struct_size; 2560 ++t) 2561 { 2562 if ((*t)->to_can_run && target_can_run (*t)) 2563 { 2564 runable = *t; 2565 ++count; 2566 } 2567 } 2568 2569 if (count != 1) 2570 { 2571 if (do_mesg) 2572 error (_("Don't know how to %s. Try \"help target\"."), do_mesg); 2573 else 2574 return NULL; 2575 } 2576 2577 return runable; 2578 } 2579 2580 void 2581 find_default_attach (struct target_ops *ops, char *args, int from_tty) 2582 { 2583 struct target_ops *t; 2584 2585 t = find_default_run_target ("attach"); 2586 (t->to_attach) (t, args, from_tty); 2587 return; 2588 } 2589 2590 void 2591 find_default_create_inferior (struct target_ops *ops, 2592 char *exec_file, char *allargs, char **env, 2593 int from_tty) 2594 { 2595 struct target_ops *t; 2596 2597 t = find_default_run_target ("run"); 2598 (t->to_create_inferior) (t, exec_file, allargs, env, from_tty); 2599 return; 2600 } 2601 2602 static int 2603 find_default_can_async_p (void) 2604 { 2605 struct target_ops *t; 2606 2607 /* This may be called before the target is pushed on the stack; 2608 look for the default process stratum. If there's none, gdb isn't 2609 configured with a native debugger, and target remote isn't 2610 connected yet. */ 2611 t = find_default_run_target (NULL); 2612 if (t && t->to_can_async_p) 2613 return (t->to_can_async_p) (); 2614 return 0; 2615 } 2616 2617 static int 2618 find_default_is_async_p (void) 2619 { 2620 struct target_ops *t; 2621 2622 /* This may be called before the target is pushed on the stack; 2623 look for the default process stratum. If there's none, gdb isn't 2624 configured with a native debugger, and target remote isn't 2625 connected yet. */ 2626 t = find_default_run_target (NULL); 2627 if (t && t->to_is_async_p) 2628 return (t->to_is_async_p) (); 2629 return 0; 2630 } 2631 2632 static int 2633 find_default_supports_non_stop (void) 2634 { 2635 struct target_ops *t; 2636 2637 t = find_default_run_target (NULL); 2638 if (t && t->to_supports_non_stop) 2639 return (t->to_supports_non_stop) (); 2640 return 0; 2641 } 2642 2643 int 2644 target_supports_non_stop (void) 2645 { 2646 struct target_ops *t; 2647 2648 for (t = ¤t_target; t != NULL; t = t->beneath) 2649 if (t->to_supports_non_stop) 2650 return t->to_supports_non_stop (); 2651 2652 return 0; 2653 } 2654 2655 2656 char * 2657 target_get_osdata (const char *type) 2658 { 2659 struct target_ops *t; 2660 2661 /* If we're already connected to something that can get us OS 2662 related data, use it. Otherwise, try using the native 2663 target. */ 2664 if (current_target.to_stratum >= process_stratum) 2665 t = current_target.beneath; 2666 else 2667 t = find_default_run_target ("get OS data"); 2668 2669 if (!t) 2670 return NULL; 2671 2672 return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); 2673 } 2674 2675 /* Determine the current address space of thread PTID. */ 2676 2677 struct address_space * 2678 target_thread_address_space (ptid_t ptid) 2679 { 2680 struct address_space *aspace; 2681 struct inferior *inf; 2682 struct target_ops *t; 2683 2684 for (t = current_target.beneath; t != NULL; t = t->beneath) 2685 { 2686 if (t->to_thread_address_space != NULL) 2687 { 2688 aspace = t->to_thread_address_space (t, ptid); 2689 gdb_assert (aspace); 2690 2691 if (targetdebug) 2692 fprintf_unfiltered (gdb_stdlog, 2693 "target_thread_address_space (%s) = %d\n", 2694 target_pid_to_str (ptid), 2695 address_space_num (aspace)); 2696 return aspace; 2697 } 2698 } 2699 2700 /* Fall-back to the "main" address space of the inferior. */ 2701 inf = find_inferior_pid (ptid_get_pid (ptid)); 2702 2703 if (inf == NULL || inf->aspace == NULL) 2704 internal_error (__FILE__, __LINE__, "\ 2705 Can't determine the current address space of thread %s\n", 2706 target_pid_to_str (ptid)); 2707 2708 return inf->aspace; 2709 } 2710 2711 static int 2712 default_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) 2713 { 2714 return (len <= gdbarch_ptr_bit (target_gdbarch) / TARGET_CHAR_BIT); 2715 } 2716 2717 static int 2718 default_watchpoint_addr_within_range (struct target_ops *target, 2719 CORE_ADDR addr, 2720 CORE_ADDR start, int length) 2721 { 2722 return addr >= start && addr < start + length; 2723 } 2724 2725 static struct gdbarch * 2726 default_thread_architecture (struct target_ops *ops, ptid_t ptid) 2727 { 2728 return target_gdbarch; 2729 } 2730 2731 static int 2732 return_zero (void) 2733 { 2734 return 0; 2735 } 2736 2737 static int 2738 return_one (void) 2739 { 2740 return 1; 2741 } 2742 2743 static int 2744 return_minus_one (void) 2745 { 2746 return -1; 2747 } 2748 2749 /* Find a single runnable target in the stack and return it. If for 2750 some reason there is more than one, return NULL. */ 2751 2752 struct target_ops * 2753 find_run_target (void) 2754 { 2755 struct target_ops **t; 2756 struct target_ops *runable = NULL; 2757 int count; 2758 2759 count = 0; 2760 2761 for (t = target_structs; t < target_structs + target_struct_size; ++t) 2762 { 2763 if ((*t)->to_can_run && target_can_run (*t)) 2764 { 2765 runable = *t; 2766 ++count; 2767 } 2768 } 2769 2770 return (count == 1 ? runable : NULL); 2771 } 2772 2773 /* Find a single core_stratum target in the list of targets and return it. 2774 If for some reason there is more than one, return NULL. */ 2775 2776 struct target_ops * 2777 find_core_target (void) 2778 { 2779 struct target_ops **t; 2780 struct target_ops *runable = NULL; 2781 int count; 2782 2783 count = 0; 2784 2785 for (t = target_structs; t < target_structs + target_struct_size; 2786 ++t) 2787 { 2788 if ((*t)->to_stratum == core_stratum) 2789 { 2790 runable = *t; 2791 ++count; 2792 } 2793 } 2794 2795 return (count == 1 ? runable : NULL); 2796 } 2797 2798 /* 2799 * Find the next target down the stack from the specified target. 2800 */ 2801 2802 struct target_ops * 2803 find_target_beneath (struct target_ops *t) 2804 { 2805 return t->beneath; 2806 } 2807 2808 2809 /* The inferior process has died. Long live the inferior! */ 2810 2811 void 2812 generic_mourn_inferior (void) 2813 { 2814 ptid_t ptid; 2815 2816 ptid = inferior_ptid; 2817 inferior_ptid = null_ptid; 2818 2819 if (!ptid_equal (ptid, null_ptid)) 2820 { 2821 int pid = ptid_get_pid (ptid); 2822 exit_inferior (pid); 2823 } 2824 2825 breakpoint_init_inferior (inf_exited); 2826 registers_changed (); 2827 2828 reopen_exec_file (); 2829 reinit_frame_cache (); 2830 2831 if (deprecated_detach_hook) 2832 deprecated_detach_hook (); 2833 } 2834 2835 /* Helper function for child_wait and the derivatives of child_wait. 2836 HOSTSTATUS is the waitstatus from wait() or the equivalent; store our 2837 translation of that in OURSTATUS. */ 2838 void 2839 store_waitstatus (struct target_waitstatus *ourstatus, int hoststatus) 2840 { 2841 if (WIFEXITED (hoststatus)) 2842 { 2843 ourstatus->kind = TARGET_WAITKIND_EXITED; 2844 ourstatus->value.integer = WEXITSTATUS (hoststatus); 2845 } 2846 else if (!WIFSTOPPED (hoststatus)) 2847 { 2848 ourstatus->kind = TARGET_WAITKIND_SIGNALLED; 2849 ourstatus->value.sig = target_signal_from_host (WTERMSIG (hoststatus)); 2850 } 2851 else 2852 { 2853 ourstatus->kind = TARGET_WAITKIND_STOPPED; 2854 ourstatus->value.sig = target_signal_from_host (WSTOPSIG (hoststatus)); 2855 } 2856 } 2857 2858 /* Convert a normal process ID to a string. Returns the string in a 2859 static buffer. */ 2860 2861 char * 2862 normal_pid_to_str (ptid_t ptid) 2863 { 2864 static char buf[32]; 2865 2866 xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid)); 2867 return buf; 2868 } 2869 2870 static char * 2871 dummy_pid_to_str (struct target_ops *ops, ptid_t ptid) 2872 { 2873 return normal_pid_to_str (ptid); 2874 } 2875 2876 /* Error-catcher for target_find_memory_regions. */ 2877 static int 2878 dummy_find_memory_regions (int (*ignore1) (), void *ignore2) 2879 { 2880 error (_("Command not implemented for this target.")); 2881 return 0; 2882 } 2883 2884 /* Error-catcher for target_make_corefile_notes. */ 2885 static char * 2886 dummy_make_corefile_notes (bfd *ignore1, int *ignore2) 2887 { 2888 error (_("Command not implemented for this target.")); 2889 return NULL; 2890 } 2891 2892 /* Error-catcher for target_get_bookmark. */ 2893 static gdb_byte * 2894 dummy_get_bookmark (char *ignore1, int ignore2) 2895 { 2896 tcomplain (); 2897 return NULL; 2898 } 2899 2900 /* Error-catcher for target_goto_bookmark. */ 2901 static void 2902 dummy_goto_bookmark (gdb_byte *ignore, int from_tty) 2903 { 2904 tcomplain (); 2905 } 2906 2907 /* Set up the handful of non-empty slots needed by the dummy target 2908 vector. */ 2909 2910 static void 2911 init_dummy_target (void) 2912 { 2913 dummy_target.to_shortname = "None"; 2914 dummy_target.to_longname = "None"; 2915 dummy_target.to_doc = ""; 2916 dummy_target.to_attach = find_default_attach; 2917 dummy_target.to_detach = 2918 (void (*)(struct target_ops *, char *, int))target_ignore; 2919 dummy_target.to_create_inferior = find_default_create_inferior; 2920 dummy_target.to_can_async_p = find_default_can_async_p; 2921 dummy_target.to_is_async_p = find_default_is_async_p; 2922 dummy_target.to_supports_non_stop = find_default_supports_non_stop; 2923 dummy_target.to_pid_to_str = dummy_pid_to_str; 2924 dummy_target.to_stratum = dummy_stratum; 2925 dummy_target.to_find_memory_regions = dummy_find_memory_regions; 2926 dummy_target.to_make_corefile_notes = dummy_make_corefile_notes; 2927 dummy_target.to_get_bookmark = dummy_get_bookmark; 2928 dummy_target.to_goto_bookmark = dummy_goto_bookmark; 2929 dummy_target.to_xfer_partial = default_xfer_partial; 2930 dummy_target.to_has_all_memory = (int (*) (struct target_ops *)) return_zero; 2931 dummy_target.to_has_memory = (int (*) (struct target_ops *)) return_zero; 2932 dummy_target.to_has_stack = (int (*) (struct target_ops *)) return_zero; 2933 dummy_target.to_has_registers = (int (*) (struct target_ops *)) return_zero; 2934 dummy_target.to_has_execution = (int (*) (struct target_ops *)) return_zero; 2935 dummy_target.to_stopped_by_watchpoint = return_zero; 2936 dummy_target.to_stopped_data_address = 2937 (int (*) (struct target_ops *, CORE_ADDR *)) return_zero; 2938 dummy_target.to_magic = OPS_MAGIC; 2939 } 2940 2941 static void 2942 debug_to_open (char *args, int from_tty) 2943 { 2944 debug_target.to_open (args, from_tty); 2945 2946 fprintf_unfiltered (gdb_stdlog, "target_open (%s, %d)\n", args, from_tty); 2947 } 2948 2949 void 2950 target_close (struct target_ops *targ, int quitting) 2951 { 2952 if (targ->to_xclose != NULL) 2953 targ->to_xclose (targ, quitting); 2954 else if (targ->to_close != NULL) 2955 targ->to_close (quitting); 2956 2957 if (targetdebug) 2958 fprintf_unfiltered (gdb_stdlog, "target_close (%d)\n", quitting); 2959 } 2960 2961 void 2962 target_attach (char *args, int from_tty) 2963 { 2964 struct target_ops *t; 2965 2966 for (t = current_target.beneath; t != NULL; t = t->beneath) 2967 { 2968 if (t->to_attach != NULL) 2969 { 2970 t->to_attach (t, args, from_tty); 2971 if (targetdebug) 2972 fprintf_unfiltered (gdb_stdlog, "target_attach (%s, %d)\n", 2973 args, from_tty); 2974 return; 2975 } 2976 } 2977 2978 internal_error (__FILE__, __LINE__, 2979 "could not find a target to attach"); 2980 } 2981 2982 int 2983 target_thread_alive (ptid_t ptid) 2984 { 2985 struct target_ops *t; 2986 2987 for (t = current_target.beneath; t != NULL; t = t->beneath) 2988 { 2989 if (t->to_thread_alive != NULL) 2990 { 2991 int retval; 2992 2993 retval = t->to_thread_alive (t, ptid); 2994 if (targetdebug) 2995 fprintf_unfiltered (gdb_stdlog, "target_thread_alive (%d) = %d\n", 2996 PIDGET (ptid), retval); 2997 2998 return retval; 2999 } 3000 } 3001 3002 return 0; 3003 } 3004 3005 void 3006 target_find_new_threads (void) 3007 { 3008 struct target_ops *t; 3009 3010 for (t = current_target.beneath; t != NULL; t = t->beneath) 3011 { 3012 if (t->to_find_new_threads != NULL) 3013 { 3014 t->to_find_new_threads (t); 3015 if (targetdebug) 3016 fprintf_unfiltered (gdb_stdlog, "target_find_new_threads ()\n"); 3017 3018 return; 3019 } 3020 } 3021 } 3022 3023 void 3024 target_stop (ptid_t ptid) 3025 { 3026 if (!may_stop) 3027 { 3028 warning (_("May not interrupt or stop the target, ignoring attempt")); 3029 return; 3030 } 3031 3032 (*current_target.to_stop) (ptid); 3033 } 3034 3035 static void 3036 debug_to_post_attach (int pid) 3037 { 3038 debug_target.to_post_attach (pid); 3039 3040 fprintf_unfiltered (gdb_stdlog, "target_post_attach (%d)\n", pid); 3041 } 3042 3043 /* Return a pretty printed form of target_waitstatus. 3044 Space for the result is malloc'd, caller must free. */ 3045 3046 char * 3047 target_waitstatus_to_string (const struct target_waitstatus *ws) 3048 { 3049 const char *kind_str = "status->kind = "; 3050 3051 switch (ws->kind) 3052 { 3053 case TARGET_WAITKIND_EXITED: 3054 return xstrprintf ("%sexited, status = %d", 3055 kind_str, ws->value.integer); 3056 case TARGET_WAITKIND_STOPPED: 3057 return xstrprintf ("%sstopped, signal = %s", 3058 kind_str, target_signal_to_name (ws->value.sig)); 3059 case TARGET_WAITKIND_SIGNALLED: 3060 return xstrprintf ("%ssignalled, signal = %s", 3061 kind_str, target_signal_to_name (ws->value.sig)); 3062 case TARGET_WAITKIND_LOADED: 3063 return xstrprintf ("%sloaded", kind_str); 3064 case TARGET_WAITKIND_FORKED: 3065 return xstrprintf ("%sforked", kind_str); 3066 case TARGET_WAITKIND_VFORKED: 3067 return xstrprintf ("%svforked", kind_str); 3068 case TARGET_WAITKIND_EXECD: 3069 return xstrprintf ("%sexecd", kind_str); 3070 case TARGET_WAITKIND_SYSCALL_ENTRY: 3071 return xstrprintf ("%sentered syscall", kind_str); 3072 case TARGET_WAITKIND_SYSCALL_RETURN: 3073 return xstrprintf ("%sexited syscall", kind_str); 3074 case TARGET_WAITKIND_SPURIOUS: 3075 return xstrprintf ("%sspurious", kind_str); 3076 case TARGET_WAITKIND_IGNORE: 3077 return xstrprintf ("%signore", kind_str); 3078 case TARGET_WAITKIND_NO_HISTORY: 3079 return xstrprintf ("%sno-history", kind_str); 3080 default: 3081 return xstrprintf ("%sunknown???", kind_str); 3082 } 3083 } 3084 3085 static void 3086 debug_print_register (const char * func, 3087 struct regcache *regcache, int regno) 3088 { 3089 struct gdbarch *gdbarch = get_regcache_arch (regcache); 3090 3091 fprintf_unfiltered (gdb_stdlog, "%s ", func); 3092 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch) 3093 && gdbarch_register_name (gdbarch, regno) != NULL 3094 && gdbarch_register_name (gdbarch, regno)[0] != '\0') 3095 fprintf_unfiltered (gdb_stdlog, "(%s)", 3096 gdbarch_register_name (gdbarch, regno)); 3097 else 3098 fprintf_unfiltered (gdb_stdlog, "(%d)", regno); 3099 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)) 3100 { 3101 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); 3102 int i, size = register_size (gdbarch, regno); 3103 unsigned char buf[MAX_REGISTER_SIZE]; 3104 3105 regcache_raw_collect (regcache, regno, buf); 3106 fprintf_unfiltered (gdb_stdlog, " = "); 3107 for (i = 0; i < size; i++) 3108 { 3109 fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); 3110 } 3111 if (size <= sizeof (LONGEST)) 3112 { 3113 ULONGEST val = extract_unsigned_integer (buf, size, byte_order); 3114 3115 fprintf_unfiltered (gdb_stdlog, " %s %s", 3116 core_addr_to_string_nz (val), plongest (val)); 3117 } 3118 } 3119 fprintf_unfiltered (gdb_stdlog, "\n"); 3120 } 3121 3122 void 3123 target_fetch_registers (struct regcache *regcache, int regno) 3124 { 3125 struct target_ops *t; 3126 3127 for (t = current_target.beneath; t != NULL; t = t->beneath) 3128 { 3129 if (t->to_fetch_registers != NULL) 3130 { 3131 t->to_fetch_registers (t, regcache, regno); 3132 if (targetdebug) 3133 debug_print_register ("target_fetch_registers", regcache, regno); 3134 return; 3135 } 3136 } 3137 } 3138 3139 void 3140 target_store_registers (struct regcache *regcache, int regno) 3141 { 3142 struct target_ops *t; 3143 3144 if (!may_write_registers) 3145 error (_("Writing to registers is not allowed (regno %d)"), regno); 3146 3147 for (t = current_target.beneath; t != NULL; t = t->beneath) 3148 { 3149 if (t->to_store_registers != NULL) 3150 { 3151 t->to_store_registers (t, regcache, regno); 3152 if (targetdebug) 3153 { 3154 debug_print_register ("target_store_registers", regcache, regno); 3155 } 3156 return; 3157 } 3158 } 3159 3160 noprocess (); 3161 } 3162 3163 int 3164 target_core_of_thread (ptid_t ptid) 3165 { 3166 struct target_ops *t; 3167 3168 for (t = current_target.beneath; t != NULL; t = t->beneath) 3169 { 3170 if (t->to_core_of_thread != NULL) 3171 { 3172 int retval = t->to_core_of_thread (t, ptid); 3173 3174 if (targetdebug) 3175 fprintf_unfiltered (gdb_stdlog, "target_core_of_thread (%d) = %d\n", 3176 PIDGET (ptid), retval); 3177 return retval; 3178 } 3179 } 3180 3181 return -1; 3182 } 3183 3184 int 3185 target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) 3186 { 3187 struct target_ops *t; 3188 3189 for (t = current_target.beneath; t != NULL; t = t->beneath) 3190 { 3191 if (t->to_verify_memory != NULL) 3192 { 3193 int retval = t->to_verify_memory (t, data, memaddr, size); 3194 3195 if (targetdebug) 3196 fprintf_unfiltered (gdb_stdlog, "target_verify_memory (%s, %s) = %d\n", 3197 paddress (target_gdbarch, memaddr), 3198 pulongest (size), 3199 retval); 3200 return retval; 3201 } 3202 } 3203 3204 tcomplain (); 3205 } 3206 3207 static void 3208 debug_to_prepare_to_store (struct regcache *regcache) 3209 { 3210 debug_target.to_prepare_to_store (regcache); 3211 3212 fprintf_unfiltered (gdb_stdlog, "target_prepare_to_store ()\n"); 3213 } 3214 3215 static int 3216 deprecated_debug_xfer_memory (CORE_ADDR memaddr, bfd_byte *myaddr, int len, 3217 int write, struct mem_attrib *attrib, 3218 struct target_ops *target) 3219 { 3220 int retval; 3221 3222 retval = debug_target.deprecated_xfer_memory (memaddr, myaddr, len, write, 3223 attrib, target); 3224 3225 fprintf_unfiltered (gdb_stdlog, 3226 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d", 3227 paddress (target_gdbarch, memaddr), len, 3228 write ? "write" : "read", retval); 3229 3230 if (retval > 0) 3231 { 3232 int i; 3233 3234 fputs_unfiltered (", bytes =", gdb_stdlog); 3235 for (i = 0; i < retval; i++) 3236 { 3237 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) 3238 { 3239 if (targetdebug < 2 && i > 0) 3240 { 3241 fprintf_unfiltered (gdb_stdlog, " ..."); 3242 break; 3243 } 3244 fprintf_unfiltered (gdb_stdlog, "\n"); 3245 } 3246 3247 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); 3248 } 3249 } 3250 3251 fputc_unfiltered ('\n', gdb_stdlog); 3252 3253 return retval; 3254 } 3255 3256 static void 3257 debug_to_files_info (struct target_ops *target) 3258 { 3259 debug_target.to_files_info (target); 3260 3261 fprintf_unfiltered (gdb_stdlog, "target_files_info (xxx)\n"); 3262 } 3263 3264 static int 3265 debug_to_insert_breakpoint (struct gdbarch *gdbarch, 3266 struct bp_target_info *bp_tgt) 3267 { 3268 int retval; 3269 3270 retval = debug_target.to_insert_breakpoint (gdbarch, bp_tgt); 3271 3272 fprintf_unfiltered (gdb_stdlog, 3273 "target_insert_breakpoint (%s, xxx) = %ld\n", 3274 core_addr_to_string (bp_tgt->placed_address), 3275 (unsigned long) retval); 3276 return retval; 3277 } 3278 3279 static int 3280 debug_to_remove_breakpoint (struct gdbarch *gdbarch, 3281 struct bp_target_info *bp_tgt) 3282 { 3283 int retval; 3284 3285 retval = debug_target.to_remove_breakpoint (gdbarch, bp_tgt); 3286 3287 fprintf_unfiltered (gdb_stdlog, 3288 "target_remove_breakpoint (%s, xxx) = %ld\n", 3289 core_addr_to_string (bp_tgt->placed_address), 3290 (unsigned long) retval); 3291 return retval; 3292 } 3293 3294 static int 3295 debug_to_can_use_hw_breakpoint (int type, int cnt, int from_tty) 3296 { 3297 int retval; 3298 3299 retval = debug_target.to_can_use_hw_breakpoint (type, cnt, from_tty); 3300 3301 fprintf_unfiltered (gdb_stdlog, 3302 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n", 3303 (unsigned long) type, 3304 (unsigned long) cnt, 3305 (unsigned long) from_tty, 3306 (unsigned long) retval); 3307 return retval; 3308 } 3309 3310 static int 3311 debug_to_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) 3312 { 3313 CORE_ADDR retval; 3314 3315 retval = debug_target.to_region_ok_for_hw_watchpoint (addr, len); 3316 3317 fprintf_unfiltered (gdb_stdlog, 3318 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n", 3319 core_addr_to_string (addr), (unsigned long) len, 3320 core_addr_to_string (retval)); 3321 return retval; 3322 } 3323 3324 static int 3325 debug_to_can_accel_watchpoint_condition (CORE_ADDR addr, int len, int rw, 3326 struct expression *cond) 3327 { 3328 int retval; 3329 3330 retval = debug_target.to_can_accel_watchpoint_condition (addr, len, rw, cond); 3331 3332 fprintf_unfiltered (gdb_stdlog, 3333 "target_can_accel_watchpoint_condition (%s, %d, %d, %s) = %ld\n", 3334 core_addr_to_string (addr), len, rw, 3335 host_address_to_string (cond), (unsigned long) retval); 3336 return retval; 3337 } 3338 3339 static int 3340 debug_to_stopped_by_watchpoint (void) 3341 { 3342 int retval; 3343 3344 retval = debug_target.to_stopped_by_watchpoint (); 3345 3346 fprintf_unfiltered (gdb_stdlog, 3347 "target_stopped_by_watchpoint () = %ld\n", 3348 (unsigned long) retval); 3349 return retval; 3350 } 3351 3352 static int 3353 debug_to_stopped_data_address (struct target_ops *target, CORE_ADDR *addr) 3354 { 3355 int retval; 3356 3357 retval = debug_target.to_stopped_data_address (target, addr); 3358 3359 fprintf_unfiltered (gdb_stdlog, 3360 "target_stopped_data_address ([%s]) = %ld\n", 3361 core_addr_to_string (*addr), 3362 (unsigned long)retval); 3363 return retval; 3364 } 3365 3366 static int 3367 debug_to_watchpoint_addr_within_range (struct target_ops *target, 3368 CORE_ADDR addr, 3369 CORE_ADDR start, int length) 3370 { 3371 int retval; 3372 3373 retval = debug_target.to_watchpoint_addr_within_range (target, addr, 3374 start, length); 3375 3376 fprintf_filtered (gdb_stdlog, 3377 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n", 3378 core_addr_to_string (addr), core_addr_to_string (start), 3379 length, retval); 3380 return retval; 3381 } 3382 3383 static int 3384 debug_to_insert_hw_breakpoint (struct gdbarch *gdbarch, 3385 struct bp_target_info *bp_tgt) 3386 { 3387 int retval; 3388 3389 retval = debug_target.to_insert_hw_breakpoint (gdbarch, bp_tgt); 3390 3391 fprintf_unfiltered (gdb_stdlog, 3392 "target_insert_hw_breakpoint (%s, xxx) = %ld\n", 3393 core_addr_to_string (bp_tgt->placed_address), 3394 (unsigned long) retval); 3395 return retval; 3396 } 3397 3398 static int 3399 debug_to_remove_hw_breakpoint (struct gdbarch *gdbarch, 3400 struct bp_target_info *bp_tgt) 3401 { 3402 int retval; 3403 3404 retval = debug_target.to_remove_hw_breakpoint (gdbarch, bp_tgt); 3405 3406 fprintf_unfiltered (gdb_stdlog, 3407 "target_remove_hw_breakpoint (%s, xxx) = %ld\n", 3408 core_addr_to_string (bp_tgt->placed_address), 3409 (unsigned long) retval); 3410 return retval; 3411 } 3412 3413 static int 3414 debug_to_insert_watchpoint (CORE_ADDR addr, int len, int type, 3415 struct expression *cond) 3416 { 3417 int retval; 3418 3419 retval = debug_target.to_insert_watchpoint (addr, len, type, cond); 3420 3421 fprintf_unfiltered (gdb_stdlog, 3422 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n", 3423 core_addr_to_string (addr), len, type, 3424 host_address_to_string (cond), (unsigned long) retval); 3425 return retval; 3426 } 3427 3428 static int 3429 debug_to_remove_watchpoint (CORE_ADDR addr, int len, int type, 3430 struct expression *cond) 3431 { 3432 int retval; 3433 3434 retval = debug_target.to_remove_watchpoint (addr, len, type, cond); 3435 3436 fprintf_unfiltered (gdb_stdlog, 3437 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n", 3438 core_addr_to_string (addr), len, type, 3439 host_address_to_string (cond), (unsigned long) retval); 3440 return retval; 3441 } 3442 3443 static void 3444 debug_to_terminal_init (void) 3445 { 3446 debug_target.to_terminal_init (); 3447 3448 fprintf_unfiltered (gdb_stdlog, "target_terminal_init ()\n"); 3449 } 3450 3451 static void 3452 debug_to_terminal_inferior (void) 3453 { 3454 debug_target.to_terminal_inferior (); 3455 3456 fprintf_unfiltered (gdb_stdlog, "target_terminal_inferior ()\n"); 3457 } 3458 3459 static void 3460 debug_to_terminal_ours_for_output (void) 3461 { 3462 debug_target.to_terminal_ours_for_output (); 3463 3464 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours_for_output ()\n"); 3465 } 3466 3467 static void 3468 debug_to_terminal_ours (void) 3469 { 3470 debug_target.to_terminal_ours (); 3471 3472 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours ()\n"); 3473 } 3474 3475 static void 3476 debug_to_terminal_save_ours (void) 3477 { 3478 debug_target.to_terminal_save_ours (); 3479 3480 fprintf_unfiltered (gdb_stdlog, "target_terminal_save_ours ()\n"); 3481 } 3482 3483 static void 3484 debug_to_terminal_info (char *arg, int from_tty) 3485 { 3486 debug_target.to_terminal_info (arg, from_tty); 3487 3488 fprintf_unfiltered (gdb_stdlog, "target_terminal_info (%s, %d)\n", arg, 3489 from_tty); 3490 } 3491 3492 static void 3493 debug_to_load (char *args, int from_tty) 3494 { 3495 debug_target.to_load (args, from_tty); 3496 3497 fprintf_unfiltered (gdb_stdlog, "target_load (%s, %d)\n", args, from_tty); 3498 } 3499 3500 static int 3501 debug_to_lookup_symbol (char *name, CORE_ADDR *addrp) 3502 { 3503 int retval; 3504 3505 retval = debug_target.to_lookup_symbol (name, addrp); 3506 3507 fprintf_unfiltered (gdb_stdlog, "target_lookup_symbol (%s, xxx)\n", name); 3508 3509 return retval; 3510 } 3511 3512 static void 3513 debug_to_post_startup_inferior (ptid_t ptid) 3514 { 3515 debug_target.to_post_startup_inferior (ptid); 3516 3517 fprintf_unfiltered (gdb_stdlog, "target_post_startup_inferior (%d)\n", 3518 PIDGET (ptid)); 3519 } 3520 3521 static void 3522 debug_to_acknowledge_created_inferior (int pid) 3523 { 3524 debug_target.to_acknowledge_created_inferior (pid); 3525 3526 fprintf_unfiltered (gdb_stdlog, "target_acknowledge_created_inferior (%d)\n", 3527 pid); 3528 } 3529 3530 static void 3531 debug_to_insert_fork_catchpoint (int pid) 3532 { 3533 debug_target.to_insert_fork_catchpoint (pid); 3534 3535 fprintf_unfiltered (gdb_stdlog, "target_insert_fork_catchpoint (%d)\n", 3536 pid); 3537 } 3538 3539 static int 3540 debug_to_remove_fork_catchpoint (int pid) 3541 { 3542 int retval; 3543 3544 retval = debug_target.to_remove_fork_catchpoint (pid); 3545 3546 fprintf_unfiltered (gdb_stdlog, "target_remove_fork_catchpoint (%d) = %d\n", 3547 pid, retval); 3548 3549 return retval; 3550 } 3551 3552 static void 3553 debug_to_insert_vfork_catchpoint (int pid) 3554 { 3555 debug_target.to_insert_vfork_catchpoint (pid); 3556 3557 fprintf_unfiltered (gdb_stdlog, "target_insert_vfork_catchpoint (%d)\n", 3558 pid); 3559 } 3560 3561 static int 3562 debug_to_remove_vfork_catchpoint (int pid) 3563 { 3564 int retval; 3565 3566 retval = debug_target.to_remove_vfork_catchpoint (pid); 3567 3568 fprintf_unfiltered (gdb_stdlog, "target_remove_vfork_catchpoint (%d) = %d\n", 3569 pid, retval); 3570 3571 return retval; 3572 } 3573 3574 static void 3575 debug_to_insert_exec_catchpoint (int pid) 3576 { 3577 debug_target.to_insert_exec_catchpoint (pid); 3578 3579 fprintf_unfiltered (gdb_stdlog, "target_insert_exec_catchpoint (%d)\n", 3580 pid); 3581 } 3582 3583 static int 3584 debug_to_remove_exec_catchpoint (int pid) 3585 { 3586 int retval; 3587 3588 retval = debug_target.to_remove_exec_catchpoint (pid); 3589 3590 fprintf_unfiltered (gdb_stdlog, "target_remove_exec_catchpoint (%d) = %d\n", 3591 pid, retval); 3592 3593 return retval; 3594 } 3595 3596 static int 3597 debug_to_has_exited (int pid, int wait_status, int *exit_status) 3598 { 3599 int has_exited; 3600 3601 has_exited = debug_target.to_has_exited (pid, wait_status, exit_status); 3602 3603 fprintf_unfiltered (gdb_stdlog, "target_has_exited (%d, %d, %d) = %d\n", 3604 pid, wait_status, *exit_status, has_exited); 3605 3606 return has_exited; 3607 } 3608 3609 static int 3610 debug_to_can_run (void) 3611 { 3612 int retval; 3613 3614 retval = debug_target.to_can_run (); 3615 3616 fprintf_unfiltered (gdb_stdlog, "target_can_run () = %d\n", retval); 3617 3618 return retval; 3619 } 3620 3621 static void 3622 debug_to_notice_signals (ptid_t ptid) 3623 { 3624 debug_target.to_notice_signals (ptid); 3625 3626 fprintf_unfiltered (gdb_stdlog, "target_notice_signals (%d)\n", 3627 PIDGET (ptid)); 3628 } 3629 3630 static struct gdbarch * 3631 debug_to_thread_architecture (struct target_ops *ops, ptid_t ptid) 3632 { 3633 struct gdbarch *retval; 3634 3635 retval = debug_target.to_thread_architecture (ops, ptid); 3636 3637 fprintf_unfiltered (gdb_stdlog, "target_thread_architecture (%s) = %s [%s]\n", 3638 target_pid_to_str (ptid), host_address_to_string (retval), 3639 gdbarch_bfd_arch_info (retval)->printable_name); 3640 return retval; 3641 } 3642 3643 static void 3644 debug_to_stop (ptid_t ptid) 3645 { 3646 debug_target.to_stop (ptid); 3647 3648 fprintf_unfiltered (gdb_stdlog, "target_stop (%s)\n", 3649 target_pid_to_str (ptid)); 3650 } 3651 3652 static void 3653 debug_to_rcmd (char *command, 3654 struct ui_file *outbuf) 3655 { 3656 debug_target.to_rcmd (command, outbuf); 3657 fprintf_unfiltered (gdb_stdlog, "target_rcmd (%s, ...)\n", command); 3658 } 3659 3660 static char * 3661 debug_to_pid_to_exec_file (int pid) 3662 { 3663 char *exec_file; 3664 3665 exec_file = debug_target.to_pid_to_exec_file (pid); 3666 3667 fprintf_unfiltered (gdb_stdlog, "target_pid_to_exec_file (%d) = %s\n", 3668 pid, exec_file); 3669 3670 return exec_file; 3671 } 3672 3673 static void 3674 setup_target_debug (void) 3675 { 3676 memcpy (&debug_target, ¤t_target, sizeof debug_target); 3677 3678 current_target.to_open = debug_to_open; 3679 current_target.to_post_attach = debug_to_post_attach; 3680 current_target.to_prepare_to_store = debug_to_prepare_to_store; 3681 current_target.deprecated_xfer_memory = deprecated_debug_xfer_memory; 3682 current_target.to_files_info = debug_to_files_info; 3683 current_target.to_insert_breakpoint = debug_to_insert_breakpoint; 3684 current_target.to_remove_breakpoint = debug_to_remove_breakpoint; 3685 current_target.to_can_use_hw_breakpoint = debug_to_can_use_hw_breakpoint; 3686 current_target.to_insert_hw_breakpoint = debug_to_insert_hw_breakpoint; 3687 current_target.to_remove_hw_breakpoint = debug_to_remove_hw_breakpoint; 3688 current_target.to_insert_watchpoint = debug_to_insert_watchpoint; 3689 current_target.to_remove_watchpoint = debug_to_remove_watchpoint; 3690 current_target.to_stopped_by_watchpoint = debug_to_stopped_by_watchpoint; 3691 current_target.to_stopped_data_address = debug_to_stopped_data_address; 3692 current_target.to_watchpoint_addr_within_range = debug_to_watchpoint_addr_within_range; 3693 current_target.to_region_ok_for_hw_watchpoint = debug_to_region_ok_for_hw_watchpoint; 3694 current_target.to_can_accel_watchpoint_condition = debug_to_can_accel_watchpoint_condition; 3695 current_target.to_terminal_init = debug_to_terminal_init; 3696 current_target.to_terminal_inferior = debug_to_terminal_inferior; 3697 current_target.to_terminal_ours_for_output = debug_to_terminal_ours_for_output; 3698 current_target.to_terminal_ours = debug_to_terminal_ours; 3699 current_target.to_terminal_save_ours = debug_to_terminal_save_ours; 3700 current_target.to_terminal_info = debug_to_terminal_info; 3701 current_target.to_load = debug_to_load; 3702 current_target.to_lookup_symbol = debug_to_lookup_symbol; 3703 current_target.to_post_startup_inferior = debug_to_post_startup_inferior; 3704 current_target.to_acknowledge_created_inferior = debug_to_acknowledge_created_inferior; 3705 current_target.to_insert_fork_catchpoint = debug_to_insert_fork_catchpoint; 3706 current_target.to_remove_fork_catchpoint = debug_to_remove_fork_catchpoint; 3707 current_target.to_insert_vfork_catchpoint = debug_to_insert_vfork_catchpoint; 3708 current_target.to_remove_vfork_catchpoint = debug_to_remove_vfork_catchpoint; 3709 current_target.to_insert_exec_catchpoint = debug_to_insert_exec_catchpoint; 3710 current_target.to_remove_exec_catchpoint = debug_to_remove_exec_catchpoint; 3711 current_target.to_has_exited = debug_to_has_exited; 3712 current_target.to_can_run = debug_to_can_run; 3713 current_target.to_notice_signals = debug_to_notice_signals; 3714 current_target.to_stop = debug_to_stop; 3715 current_target.to_rcmd = debug_to_rcmd; 3716 current_target.to_pid_to_exec_file = debug_to_pid_to_exec_file; 3717 current_target.to_thread_architecture = debug_to_thread_architecture; 3718 } 3719 3720 3721 static char targ_desc[] = 3722 "Names of targets and files being debugged.\n\ 3723 Shows the entire stack of targets currently in use (including the exec-file,\n\ 3724 core-file, and process, if any), as well as the symbol file name."; 3725 3726 static void 3727 do_monitor_command (char *cmd, 3728 int from_tty) 3729 { 3730 if ((current_target.to_rcmd 3731 == (void (*) (char *, struct ui_file *)) tcomplain) 3732 || (current_target.to_rcmd == debug_to_rcmd 3733 && (debug_target.to_rcmd 3734 == (void (*) (char *, struct ui_file *)) tcomplain))) 3735 error (_("\"monitor\" command not supported by this target.")); 3736 target_rcmd (cmd, gdb_stdtarg); 3737 } 3738 3739 /* Print the name of each layers of our target stack. */ 3740 3741 static void 3742 maintenance_print_target_stack (char *cmd, int from_tty) 3743 { 3744 struct target_ops *t; 3745 3746 printf_filtered (_("The current target stack is:\n")); 3747 3748 for (t = target_stack; t != NULL; t = t->beneath) 3749 { 3750 printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname); 3751 } 3752 } 3753 3754 /* Controls if async mode is permitted. */ 3755 int target_async_permitted = 0; 3756 3757 /* The set command writes to this variable. If the inferior is 3758 executing, linux_nat_async_permitted is *not* updated. */ 3759 static int target_async_permitted_1 = 0; 3760 3761 static void 3762 set_maintenance_target_async_permitted (char *args, int from_tty, 3763 struct cmd_list_element *c) 3764 { 3765 if (have_live_inferiors ()) 3766 { 3767 target_async_permitted_1 = target_async_permitted; 3768 error (_("Cannot change this setting while the inferior is running.")); 3769 } 3770 3771 target_async_permitted = target_async_permitted_1; 3772 } 3773 3774 static void 3775 show_maintenance_target_async_permitted (struct ui_file *file, int from_tty, 3776 struct cmd_list_element *c, 3777 const char *value) 3778 { 3779 fprintf_filtered (file, _("\ 3780 Controlling the inferior in asynchronous mode is %s.\n"), value); 3781 } 3782 3783 /* Temporary copies of permission settings. */ 3784 3785 static int may_write_registers_1 = 1; 3786 static int may_write_memory_1 = 1; 3787 static int may_insert_breakpoints_1 = 1; 3788 static int may_insert_tracepoints_1 = 1; 3789 static int may_insert_fast_tracepoints_1 = 1; 3790 static int may_stop_1 = 1; 3791 3792 /* Make the user-set values match the real values again. */ 3793 3794 void 3795 update_target_permissions (void) 3796 { 3797 may_write_registers_1 = may_write_registers; 3798 may_write_memory_1 = may_write_memory; 3799 may_insert_breakpoints_1 = may_insert_breakpoints; 3800 may_insert_tracepoints_1 = may_insert_tracepoints; 3801 may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; 3802 may_stop_1 = may_stop; 3803 } 3804 3805 /* The one function handles (most of) the permission flags in the same 3806 way. */ 3807 3808 static void 3809 set_target_permissions (char *args, int from_tty, 3810 struct cmd_list_element *c) 3811 { 3812 if (target_has_execution) 3813 { 3814 update_target_permissions (); 3815 error (_("Cannot change this setting while the inferior is running.")); 3816 } 3817 3818 /* Make the real values match the user-changed values. */ 3819 may_write_registers = may_write_registers_1; 3820 may_insert_breakpoints = may_insert_breakpoints_1; 3821 may_insert_tracepoints = may_insert_tracepoints_1; 3822 may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; 3823 may_stop = may_stop_1; 3824 update_observer_mode (); 3825 } 3826 3827 /* Set memory write permission independently of observer mode. */ 3828 3829 static void 3830 set_write_memory_permission (char *args, int from_tty, 3831 struct cmd_list_element *c) 3832 { 3833 /* Make the real values match the user-changed values. */ 3834 may_write_memory = may_write_memory_1; 3835 update_observer_mode (); 3836 } 3837 3838 3839 void 3840 initialize_targets (void) 3841 { 3842 init_dummy_target (); 3843 push_target (&dummy_target); 3844 3845 add_info ("target", target_info, targ_desc); 3846 add_info ("files", target_info, targ_desc); 3847 3848 add_setshow_zinteger_cmd ("target", class_maintenance, &targetdebug, _("\ 3849 Set target debugging."), _("\ 3850 Show target debugging."), _("\ 3851 When non-zero, target debugging is enabled. Higher numbers are more\n\ 3852 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\ 3853 command."), 3854 NULL, 3855 show_targetdebug, 3856 &setdebuglist, &showdebuglist); 3857 3858 add_setshow_boolean_cmd ("trust-readonly-sections", class_support, 3859 &trust_readonly, _("\ 3860 Set mode for reading from readonly sections."), _("\ 3861 Show mode for reading from readonly sections."), _("\ 3862 When this mode is on, memory reads from readonly sections (such as .text)\n\ 3863 will be read from the object file instead of from the target. This will\n\ 3864 result in significant performance improvement for remote targets."), 3865 NULL, 3866 show_trust_readonly, 3867 &setlist, &showlist); 3868 3869 add_com ("monitor", class_obscure, do_monitor_command, 3870 _("Send a command to the remote monitor (remote targets only).")); 3871 3872 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, 3873 _("Print the name of each layer of the internal target stack."), 3874 &maintenanceprintlist); 3875 3876 add_setshow_boolean_cmd ("target-async", no_class, 3877 &target_async_permitted_1, _("\ 3878 Set whether gdb controls the inferior in asynchronous mode."), _("\ 3879 Show whether gdb controls the inferior in asynchronous mode."), _("\ 3880 Tells gdb whether to control the inferior in asynchronous mode."), 3881 set_maintenance_target_async_permitted, 3882 show_maintenance_target_async_permitted, 3883 &setlist, 3884 &showlist); 3885 3886 add_setshow_boolean_cmd ("stack-cache", class_support, 3887 &stack_cache_enabled_p_1, _("\ 3888 Set cache use for stack access."), _("\ 3889 Show cache use for stack access."), _("\ 3890 When on, use the data cache for all stack access, regardless of any\n\ 3891 configured memory regions. This improves remote performance significantly.\n\ 3892 By default, caching for stack access is on."), 3893 set_stack_cache_enabled_p, 3894 show_stack_cache_enabled_p, 3895 &setlist, &showlist); 3896 3897 add_setshow_boolean_cmd ("may-write-registers", class_support, 3898 &may_write_registers_1, _("\ 3899 Set permission to write into registers."), _("\ 3900 Show permission to write into registers."), _("\ 3901 When this permission is on, GDB may write into the target's registers.\n\ 3902 Otherwise, any sort of write attempt will result in an error."), 3903 set_target_permissions, NULL, 3904 &setlist, &showlist); 3905 3906 add_setshow_boolean_cmd ("may-write-memory", class_support, 3907 &may_write_memory_1, _("\ 3908 Set permission to write into target memory."), _("\ 3909 Show permission to write into target memory."), _("\ 3910 When this permission is on, GDB may write into the target's memory.\n\ 3911 Otherwise, any sort of write attempt will result in an error."), 3912 set_write_memory_permission, NULL, 3913 &setlist, &showlist); 3914 3915 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, 3916 &may_insert_breakpoints_1, _("\ 3917 Set permission to insert breakpoints in the target."), _("\ 3918 Show permission to insert breakpoints in the target."), _("\ 3919 When this permission is on, GDB may insert breakpoints in the program.\n\ 3920 Otherwise, any sort of insertion attempt will result in an error."), 3921 set_target_permissions, NULL, 3922 &setlist, &showlist); 3923 3924 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, 3925 &may_insert_tracepoints_1, _("\ 3926 Set permission to insert tracepoints in the target."), _("\ 3927 Show permission to insert tracepoints in the target."), _("\ 3928 When this permission is on, GDB may insert tracepoints in the program.\n\ 3929 Otherwise, any sort of insertion attempt will result in an error."), 3930 set_target_permissions, NULL, 3931 &setlist, &showlist); 3932 3933 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, 3934 &may_insert_fast_tracepoints_1, _("\ 3935 Set permission to insert fast tracepoints in the target."), _("\ 3936 Show permission to insert fast tracepoints in the target."), _("\ 3937 When this permission is on, GDB may insert fast tracepoints.\n\ 3938 Otherwise, any sort of insertion attempt will result in an error."), 3939 set_target_permissions, NULL, 3940 &setlist, &showlist); 3941 3942 add_setshow_boolean_cmd ("may-interrupt", class_support, 3943 &may_stop_1, _("\ 3944 Set permission to interrupt or signal the target."), _("\ 3945 Show permission to interrupt or signal the target."), _("\ 3946 When this permission is on, GDB may interrupt/stop the target's execution.\n\ 3947 Otherwise, any attempt to interrupt or stop will be ignored."), 3948 set_target_permissions, NULL, 3949 &setlist, &showlist); 3950 3951 3952 target_dcache = dcache_init (); 3953 } 3954