| 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 |
| 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 | |
| 45 | static void target_info (char *, int); |
| 46 | |
| 47 | static void kill_or_be_killed (int); |
| 48 | |
| 49 | static void default_terminal_info (char *, int); |
| 50 | |
| 51 | static int default_watchpoint_addr_within_range (struct target_ops *, |
| 52 | CORE_ADDR, CORE_ADDR, int); |
| 53 | |
| 54 | static int default_region_ok_for_hw_watchpoint (CORE_ADDR, int); |
| 55 | |
| 56 | static int nosymbol (char *, CORE_ADDR *); |
| 57 | |
| 58 | static void tcomplain (void) ATTR_NORETURN; |
| 59 | |
| 60 | static int nomemory (CORE_ADDR, char *, int, int, struct target_ops *); |
| 61 | |
| 62 | static int return_zero (void); |
| 63 | |
| 64 | static int return_one (void); |
| 65 | |
| 66 | static int return_minus_one (void); |
| 67 | |
| 68 | void target_ignore (void); |
| 69 | |
| 70 | static void target_command (char *, int); |
| 71 | |
| 72 | static struct target_ops *find_default_run_target (char *); |
| 73 | |
| 74 | static void nosupport_runtime (void); |
| 75 | |
| 76 | static LONGEST default_xfer_partial (struct target_ops *ops, |
| 77 | enum target_object object, |
| 78 | const char *annex, gdb_byte *readbuf, |
| 79 | const gdb_byte *writebuf, |
| 80 | ULONGEST offset, LONGEST len); |
| 81 | |
| 82 | static LONGEST current_xfer_partial (struct target_ops *ops, |
| 83 | enum target_object object, |
| 84 | const char *annex, gdb_byte *readbuf, |
| 85 | const gdb_byte *writebuf, |
| 86 | ULONGEST offset, LONGEST len); |
| 87 | |
| 88 | static LONGEST target_xfer_partial (struct target_ops *ops, |
| 89 | enum target_object object, |
| 90 | const char *annex, |
| 91 | void *readbuf, const void *writebuf, |
| 92 | ULONGEST offset, LONGEST len); |
| 93 | |
| 94 | static void init_dummy_target (void); |
| 95 | |
| 96 | static struct target_ops debug_target; |
| 97 | |
| 98 | static void debug_to_open (char *, int); |
| 99 | |
| 100 | static void debug_to_close (int); |
| 101 | |
| 102 | static void debug_to_attach (char *, int); |
| 103 | |
| 104 | static void debug_to_detach (char *, int); |
| 105 | |
| 106 | static void debug_to_resume (ptid_t, int, enum target_signal); |
| 107 | |
| 108 | static ptid_t debug_to_wait (ptid_t, struct target_waitstatus *); |
| 109 | |
| 110 | static void debug_to_fetch_registers (struct regcache *, int); |
| 111 | |
| 112 | static void debug_to_store_registers (struct regcache *, int); |
| 113 | |
| 114 | static void debug_to_prepare_to_store (struct regcache *); |
| 115 | |
| 116 | static void debug_to_files_info (struct target_ops *); |
| 117 | |
| 118 | static int debug_to_insert_breakpoint (struct bp_target_info *); |
| 119 | |
| 120 | static int debug_to_remove_breakpoint (struct bp_target_info *); |
| 121 | |
| 122 | static int debug_to_can_use_hw_breakpoint (int, int, int); |
| 123 | |
| 124 | static int debug_to_insert_hw_breakpoint (struct bp_target_info *); |
| 125 | |
| 126 | static int debug_to_remove_hw_breakpoint (struct bp_target_info *); |
| 127 | |
| 128 | static int debug_to_insert_watchpoint (CORE_ADDR, int, int); |
| 129 | |
| 130 | static int debug_to_remove_watchpoint (CORE_ADDR, int, int); |
| 131 | |
| 132 | static int debug_to_stopped_by_watchpoint (void); |
| 133 | |
| 134 | static int debug_to_stopped_data_address (struct target_ops *, CORE_ADDR *); |
| 135 | |
| 136 | static int debug_to_watchpoint_addr_within_range (struct target_ops *, |
| 137 | CORE_ADDR, CORE_ADDR, int); |
| 138 | |
| 139 | static int debug_to_region_ok_for_hw_watchpoint (CORE_ADDR, int); |
| 140 | |
| 141 | static void debug_to_terminal_init (void); |
| 142 | |
| 143 | static void debug_to_terminal_inferior (void); |
| 144 | |
| 145 | static void debug_to_terminal_ours_for_output (void); |
| 146 | |
| 147 | static void debug_to_terminal_save_ours (void); |
| 148 | |
| 149 | static void debug_to_terminal_ours (void); |
| 150 | |
| 151 | static void debug_to_terminal_info (char *, int); |
| 152 | |
| 153 | static void debug_to_kill (void); |
| 154 | |
| 155 | static void debug_to_load (char *, int); |
| 156 | |
| 157 | static int debug_to_lookup_symbol (char *, CORE_ADDR *); |
| 158 | |
| 159 | static void debug_to_mourn_inferior (void); |
| 160 | |
| 161 | static int debug_to_can_run (void); |
| 162 | |
| 163 | static void debug_to_notice_signals (ptid_t); |
| 164 | |
| 165 | static int debug_to_thread_alive (ptid_t); |
| 166 | |
| 167 | static void debug_to_stop (ptid_t); |
| 168 | |
| 169 | /* NOTE: cagney/2004-09-29: Many targets reference this variable in |
| 170 | wierd and mysterious ways. Putting the variable here lets those |
| 171 | wierd and mysterious ways keep building while they are being |
| 172 | converted to the inferior inheritance structure. */ |
| 173 | struct target_ops deprecated_child_ops; |
| 174 | |
| 175 | /* Pointer to array of target architecture structures; the size of the |
| 176 | array; the current index into the array; the allocated size of the |
| 177 | array. */ |
| 178 | struct target_ops **target_structs; |
| 179 | unsigned target_struct_size; |
| 180 | unsigned target_struct_index; |
| 181 | unsigned target_struct_allocsize; |
| 182 | #define DEFAULT_ALLOCSIZE 10 |
| 183 | |
| 184 | /* The initial current target, so that there is always a semi-valid |
| 185 | current target. */ |
| 186 | |
| 187 | static struct target_ops dummy_target; |
| 188 | |
| 189 | /* Top of target stack. */ |
| 190 | |
| 191 | static struct target_ops *target_stack; |
| 192 | |
| 193 | /* The target structure we are currently using to talk to a process |
| 194 | or file or whatever "inferior" we have. */ |
| 195 | |
| 196 | struct target_ops current_target; |
| 197 | |
| 198 | /* Command list for target. */ |
| 199 | |
| 200 | static struct cmd_list_element *targetlist = NULL; |
| 201 | |
| 202 | /* Nonzero if we are debugging an attached outside process |
| 203 | rather than an inferior. */ |
| 204 | |
| 205 | int attach_flag; |
| 206 | |
| 207 | /* Nonzero if we should trust readonly sections from the |
| 208 | executable when reading memory. */ |
| 209 | |
| 210 | static int trust_readonly = 0; |
| 211 | |
| 212 | /* Nonzero if we should show true memory content including |
| 213 | memory breakpoint inserted by gdb. */ |
| 214 | |
| 215 | static int show_memory_breakpoints = 0; |
| 216 | |
| 217 | /* Non-zero if we want to see trace of target level stuff. */ |
| 218 | |
| 219 | static int targetdebug = 0; |
| 220 | static void |
| 221 | show_targetdebug (struct ui_file *file, int from_tty, |
| 222 | struct cmd_list_element *c, const char *value) |
| 223 | { |
| 224 | fprintf_filtered (file, _("Target debugging is %s.\n"), value); |
| 225 | } |
| 226 | |
| 227 | static void setup_target_debug (void); |
| 228 | |
| 229 | DCACHE *target_dcache; |
| 230 | |
| 231 | /* The user just typed 'target' without the name of a target. */ |
| 232 | |
| 233 | static void |
| 234 | target_command (char *arg, int from_tty) |
| 235 | { |
| 236 | fputs_filtered ("Argument required (target name). Try `help target'\n", |
| 237 | gdb_stdout); |
| 238 | } |
| 239 | |
| 240 | /* Add a possible target architecture to the list. */ |
| 241 | |
| 242 | void |
| 243 | add_target (struct target_ops *t) |
| 244 | { |
| 245 | /* Provide default values for all "must have" methods. */ |
| 246 | if (t->to_xfer_partial == NULL) |
| 247 | t->to_xfer_partial = default_xfer_partial; |
| 248 | |
| 249 | if (!target_structs) |
| 250 | { |
| 251 | target_struct_allocsize = DEFAULT_ALLOCSIZE; |
| 252 | target_structs = (struct target_ops **) xmalloc |
| 253 | (target_struct_allocsize * sizeof (*target_structs)); |
| 254 | } |
| 255 | if (target_struct_size >= target_struct_allocsize) |
| 256 | { |
| 257 | target_struct_allocsize *= 2; |
| 258 | target_structs = (struct target_ops **) |
| 259 | xrealloc ((char *) target_structs, |
| 260 | target_struct_allocsize * sizeof (*target_structs)); |
| 261 | } |
| 262 | target_structs[target_struct_size++] = t; |
| 263 | |
| 264 | if (targetlist == NULL) |
| 265 | add_prefix_cmd ("target", class_run, target_command, _("\ |
| 266 | Connect to a target machine or process.\n\ |
| 267 | The first argument is the type or protocol of the target machine.\n\ |
| 268 | Remaining arguments are interpreted by the target protocol. For more\n\ |
| 269 | information on the arguments for a particular protocol, type\n\ |
| 270 | `help target ' followed by the protocol name."), |
| 271 | &targetlist, "target ", 0, &cmdlist); |
| 272 | add_cmd (t->to_shortname, no_class, t->to_open, t->to_doc, &targetlist); |
| 273 | } |
| 274 | |
| 275 | /* Stub functions */ |
| 276 | |
| 277 | void |
| 278 | target_ignore (void) |
| 279 | { |
| 280 | } |
| 281 | |
| 282 | void |
| 283 | target_load (char *arg, int from_tty) |
| 284 | { |
| 285 | dcache_invalidate (target_dcache); |
| 286 | (*current_target.to_load) (arg, from_tty); |
| 287 | } |
| 288 | |
| 289 | static int |
| 290 | nomemory (CORE_ADDR memaddr, char *myaddr, int len, int write, |
| 291 | struct target_ops *t) |
| 292 | { |
| 293 | errno = EIO; /* Can't read/write this location */ |
| 294 | return 0; /* No bytes handled */ |
| 295 | } |
| 296 | |
| 297 | static void |
| 298 | tcomplain (void) |
| 299 | { |
| 300 | error (_("You can't do that when your target is `%s'"), |
| 301 | current_target.to_shortname); |
| 302 | } |
| 303 | |
| 304 | void |
| 305 | noprocess (void) |
| 306 | { |
| 307 | error (_("You can't do that without a process to debug.")); |
| 308 | } |
| 309 | |
| 310 | static int |
| 311 | nosymbol (char *name, CORE_ADDR *addrp) |
| 312 | { |
| 313 | return 1; /* Symbol does not exist in target env */ |
| 314 | } |
| 315 | |
| 316 | static void |
| 317 | nosupport_runtime (void) |
| 318 | { |
| 319 | if (ptid_equal (inferior_ptid, null_ptid)) |
| 320 | noprocess (); |
| 321 | else |
| 322 | error (_("No run-time support for this")); |
| 323 | } |
| 324 | |
| 325 | |
| 326 | static void |
| 327 | default_terminal_info (char *args, int from_tty) |
| 328 | { |
| 329 | printf_unfiltered (_("No saved terminal information.\n")); |
| 330 | } |
| 331 | |
| 332 | /* This is the default target_create_inferior and target_attach function. |
| 333 | If the current target is executing, it asks whether to kill it off. |
| 334 | If this function returns without calling error(), it has killed off |
| 335 | the target, and the operation should be attempted. */ |
| 336 | |
| 337 | static void |
| 338 | kill_or_be_killed (int from_tty) |
| 339 | { |
| 340 | if (target_has_execution) |
| 341 | { |
| 342 | printf_unfiltered (_("You are already running a program:\n")); |
| 343 | target_files_info (); |
| 344 | if (query ("Kill it? ")) |
| 345 | { |
| 346 | target_kill (); |
| 347 | if (target_has_execution) |
| 348 | error (_("Killing the program did not help.")); |
| 349 | return; |
| 350 | } |
| 351 | else |
| 352 | { |
| 353 | error (_("Program not killed.")); |
| 354 | } |
| 355 | } |
| 356 | tcomplain (); |
| 357 | } |
| 358 | |
| 359 | /* Go through the target stack from top to bottom, copying over zero |
| 360 | entries in current_target, then filling in still empty entries. In |
| 361 | effect, we are doing class inheritance through the pushed target |
| 362 | vectors. |
| 363 | |
| 364 | NOTE: cagney/2003-10-17: The problem with this inheritance, as it |
| 365 | is currently implemented, is that it discards any knowledge of |
| 366 | which target an inherited method originally belonged to. |
| 367 | Consequently, new new target methods should instead explicitly and |
| 368 | locally search the target stack for the target that can handle the |
| 369 | request. */ |
| 370 | |
| 371 | static void |
| 372 | update_current_target (void) |
| 373 | { |
| 374 | struct target_ops *t; |
| 375 | |
| 376 | /* First, reset current's contents. */ |
| 377 | memset (¤t_target, 0, sizeof (current_target)); |
| 378 | |
| 379 | #define INHERIT(FIELD, TARGET) \ |
| 380 | if (!current_target.FIELD) \ |
| 381 | current_target.FIELD = (TARGET)->FIELD |
| 382 | |
| 383 | for (t = target_stack; t; t = t->beneath) |
| 384 | { |
| 385 | INHERIT (to_shortname, t); |
| 386 | INHERIT (to_longname, t); |
| 387 | INHERIT (to_doc, t); |
| 388 | /* Do not inherit to_open. */ |
| 389 | /* Do not inherit to_close. */ |
| 390 | INHERIT (to_attach, t); |
| 391 | INHERIT (to_post_attach, t); |
| 392 | INHERIT (to_attach_no_wait, t); |
| 393 | INHERIT (to_detach, t); |
| 394 | /* Do not inherit to_disconnect. */ |
| 395 | INHERIT (to_resume, t); |
| 396 | INHERIT (to_wait, t); |
| 397 | INHERIT (to_fetch_registers, t); |
| 398 | INHERIT (to_store_registers, t); |
| 399 | INHERIT (to_prepare_to_store, t); |
| 400 | INHERIT (deprecated_xfer_memory, t); |
| 401 | INHERIT (to_files_info, t); |
| 402 | INHERIT (to_insert_breakpoint, t); |
| 403 | INHERIT (to_remove_breakpoint, t); |
| 404 | INHERIT (to_can_use_hw_breakpoint, t); |
| 405 | INHERIT (to_insert_hw_breakpoint, t); |
| 406 | INHERIT (to_remove_hw_breakpoint, t); |
| 407 | INHERIT (to_insert_watchpoint, t); |
| 408 | INHERIT (to_remove_watchpoint, t); |
| 409 | INHERIT (to_stopped_data_address, t); |
| 410 | INHERIT (to_have_steppable_watchpoint, t); |
| 411 | INHERIT (to_have_continuable_watchpoint, t); |
| 412 | INHERIT (to_stopped_by_watchpoint, t); |
| 413 | INHERIT (to_watchpoint_addr_within_range, t); |
| 414 | INHERIT (to_region_ok_for_hw_watchpoint, t); |
| 415 | INHERIT (to_terminal_init, t); |
| 416 | INHERIT (to_terminal_inferior, t); |
| 417 | INHERIT (to_terminal_ours_for_output, t); |
| 418 | INHERIT (to_terminal_ours, t); |
| 419 | INHERIT (to_terminal_save_ours, t); |
| 420 | INHERIT (to_terminal_info, t); |
| 421 | INHERIT (to_kill, t); |
| 422 | INHERIT (to_load, t); |
| 423 | INHERIT (to_lookup_symbol, t); |
| 424 | INHERIT (to_create_inferior, t); |
| 425 | INHERIT (to_post_startup_inferior, t); |
| 426 | INHERIT (to_acknowledge_created_inferior, t); |
| 427 | INHERIT (to_insert_fork_catchpoint, t); |
| 428 | INHERIT (to_remove_fork_catchpoint, t); |
| 429 | INHERIT (to_insert_vfork_catchpoint, t); |
| 430 | INHERIT (to_remove_vfork_catchpoint, t); |
| 431 | /* Do not inherit to_follow_fork. */ |
| 432 | INHERIT (to_insert_exec_catchpoint, t); |
| 433 | INHERIT (to_remove_exec_catchpoint, t); |
| 434 | INHERIT (to_has_exited, t); |
| 435 | INHERIT (to_mourn_inferior, t); |
| 436 | INHERIT (to_can_run, t); |
| 437 | INHERIT (to_notice_signals, t); |
| 438 | INHERIT (to_thread_alive, t); |
| 439 | INHERIT (to_find_new_threads, t); |
| 440 | INHERIT (to_pid_to_str, t); |
| 441 | INHERIT (to_extra_thread_info, t); |
| 442 | INHERIT (to_stop, t); |
| 443 | /* Do not inherit to_xfer_partial. */ |
| 444 | INHERIT (to_rcmd, t); |
| 445 | INHERIT (to_pid_to_exec_file, t); |
| 446 | INHERIT (to_log_command, t); |
| 447 | INHERIT (to_stratum, t); |
| 448 | INHERIT (to_has_all_memory, t); |
| 449 | INHERIT (to_has_memory, t); |
| 450 | INHERIT (to_has_stack, t); |
| 451 | INHERIT (to_has_registers, t); |
| 452 | INHERIT (to_has_execution, t); |
| 453 | INHERIT (to_has_thread_control, t); |
| 454 | INHERIT (to_sections, t); |
| 455 | INHERIT (to_sections_end, t); |
| 456 | INHERIT (to_can_async_p, t); |
| 457 | INHERIT (to_is_async_p, t); |
| 458 | INHERIT (to_async, t); |
| 459 | INHERIT (to_async_mask, t); |
| 460 | INHERIT (to_find_memory_regions, t); |
| 461 | INHERIT (to_make_corefile_notes, t); |
| 462 | INHERIT (to_get_thread_local_address, t); |
| 463 | /* Do not inherit to_read_description. */ |
| 464 | /* Do not inherit to_search_memory. */ |
| 465 | INHERIT (to_magic, t); |
| 466 | /* Do not inherit to_memory_map. */ |
| 467 | /* Do not inherit to_flash_erase. */ |
| 468 | /* Do not inherit to_flash_done. */ |
| 469 | } |
| 470 | #undef INHERIT |
| 471 | |
| 472 | /* Clean up a target struct so it no longer has any zero pointers in |
| 473 | it. Some entries are defaulted to a method that print an error, |
| 474 | others are hard-wired to a standard recursive default. */ |
| 475 | |
| 476 | #define de_fault(field, value) \ |
| 477 | if (!current_target.field) \ |
| 478 | current_target.field = value |
| 479 | |
| 480 | de_fault (to_open, |
| 481 | (void (*) (char *, int)) |
| 482 | tcomplain); |
| 483 | de_fault (to_close, |
| 484 | (void (*) (int)) |
| 485 | target_ignore); |
| 486 | de_fault (to_post_attach, |
| 487 | (void (*) (int)) |
| 488 | target_ignore); |
| 489 | de_fault (to_detach, |
| 490 | (void (*) (char *, int)) |
| 491 | target_ignore); |
| 492 | de_fault (to_resume, |
| 493 | (void (*) (ptid_t, int, enum target_signal)) |
| 494 | noprocess); |
| 495 | de_fault (to_wait, |
| 496 | (ptid_t (*) (ptid_t, struct target_waitstatus *)) |
| 497 | noprocess); |
| 498 | de_fault (to_fetch_registers, |
| 499 | (void (*) (struct regcache *, int)) |
| 500 | target_ignore); |
| 501 | de_fault (to_store_registers, |
| 502 | (void (*) (struct regcache *, int)) |
| 503 | noprocess); |
| 504 | de_fault (to_prepare_to_store, |
| 505 | (void (*) (struct regcache *)) |
| 506 | noprocess); |
| 507 | de_fault (deprecated_xfer_memory, |
| 508 | (int (*) (CORE_ADDR, gdb_byte *, int, int, struct mem_attrib *, struct target_ops *)) |
| 509 | nomemory); |
| 510 | de_fault (to_files_info, |
| 511 | (void (*) (struct target_ops *)) |
| 512 | target_ignore); |
| 513 | de_fault (to_insert_breakpoint, |
| 514 | memory_insert_breakpoint); |
| 515 | de_fault (to_remove_breakpoint, |
| 516 | memory_remove_breakpoint); |
| 517 | de_fault (to_can_use_hw_breakpoint, |
| 518 | (int (*) (int, int, int)) |
| 519 | return_zero); |
| 520 | de_fault (to_insert_hw_breakpoint, |
| 521 | (int (*) (struct bp_target_info *)) |
| 522 | return_minus_one); |
| 523 | de_fault (to_remove_hw_breakpoint, |
| 524 | (int (*) (struct bp_target_info *)) |
| 525 | return_minus_one); |
| 526 | de_fault (to_insert_watchpoint, |
| 527 | (int (*) (CORE_ADDR, int, int)) |
| 528 | return_minus_one); |
| 529 | de_fault (to_remove_watchpoint, |
| 530 | (int (*) (CORE_ADDR, int, int)) |
| 531 | return_minus_one); |
| 532 | de_fault (to_stopped_by_watchpoint, |
| 533 | (int (*) (void)) |
| 534 | return_zero); |
| 535 | de_fault (to_stopped_data_address, |
| 536 | (int (*) (struct target_ops *, CORE_ADDR *)) |
| 537 | return_zero); |
| 538 | de_fault (to_watchpoint_addr_within_range, |
| 539 | default_watchpoint_addr_within_range); |
| 540 | de_fault (to_region_ok_for_hw_watchpoint, |
| 541 | default_region_ok_for_hw_watchpoint); |
| 542 | de_fault (to_terminal_init, |
| 543 | (void (*) (void)) |
| 544 | target_ignore); |
| 545 | de_fault (to_terminal_inferior, |
| 546 | (void (*) (void)) |
| 547 | target_ignore); |
| 548 | de_fault (to_terminal_ours_for_output, |
| 549 | (void (*) (void)) |
| 550 | target_ignore); |
| 551 | de_fault (to_terminal_ours, |
| 552 | (void (*) (void)) |
| 553 | target_ignore); |
| 554 | de_fault (to_terminal_save_ours, |
| 555 | (void (*) (void)) |
| 556 | target_ignore); |
| 557 | de_fault (to_terminal_info, |
| 558 | default_terminal_info); |
| 559 | de_fault (to_kill, |
| 560 | (void (*) (void)) |
| 561 | noprocess); |
| 562 | de_fault (to_load, |
| 563 | (void (*) (char *, int)) |
| 564 | tcomplain); |
| 565 | de_fault (to_lookup_symbol, |
| 566 | (int (*) (char *, CORE_ADDR *)) |
| 567 | nosymbol); |
| 568 | de_fault (to_post_startup_inferior, |
| 569 | (void (*) (ptid_t)) |
| 570 | target_ignore); |
| 571 | de_fault (to_acknowledge_created_inferior, |
| 572 | (void (*) (int)) |
| 573 | target_ignore); |
| 574 | de_fault (to_insert_fork_catchpoint, |
| 575 | (void (*) (int)) |
| 576 | tcomplain); |
| 577 | de_fault (to_remove_fork_catchpoint, |
| 578 | (int (*) (int)) |
| 579 | tcomplain); |
| 580 | de_fault (to_insert_vfork_catchpoint, |
| 581 | (void (*) (int)) |
| 582 | tcomplain); |
| 583 | de_fault (to_remove_vfork_catchpoint, |
| 584 | (int (*) (int)) |
| 585 | tcomplain); |
| 586 | de_fault (to_insert_exec_catchpoint, |
| 587 | (void (*) (int)) |
| 588 | tcomplain); |
| 589 | de_fault (to_remove_exec_catchpoint, |
| 590 | (int (*) (int)) |
| 591 | tcomplain); |
| 592 | de_fault (to_has_exited, |
| 593 | (int (*) (int, int, int *)) |
| 594 | return_zero); |
| 595 | de_fault (to_mourn_inferior, |
| 596 | (void (*) (void)) |
| 597 | noprocess); |
| 598 | de_fault (to_can_run, |
| 599 | return_zero); |
| 600 | de_fault (to_notice_signals, |
| 601 | (void (*) (ptid_t)) |
| 602 | target_ignore); |
| 603 | de_fault (to_thread_alive, |
| 604 | (int (*) (ptid_t)) |
| 605 | return_zero); |
| 606 | de_fault (to_find_new_threads, |
| 607 | (void (*) (void)) |
| 608 | target_ignore); |
| 609 | de_fault (to_extra_thread_info, |
| 610 | (char *(*) (struct thread_info *)) |
| 611 | return_zero); |
| 612 | de_fault (to_stop, |
| 613 | (void (*) (ptid_t)) |
| 614 | target_ignore); |
| 615 | current_target.to_xfer_partial = current_xfer_partial; |
| 616 | de_fault (to_rcmd, |
| 617 | (void (*) (char *, struct ui_file *)) |
| 618 | tcomplain); |
| 619 | de_fault (to_pid_to_exec_file, |
| 620 | (char *(*) (int)) |
| 621 | return_zero); |
| 622 | de_fault (to_async, |
| 623 | (void (*) (void (*) (enum inferior_event_type, void*), void*)) |
| 624 | tcomplain); |
| 625 | de_fault (to_async_mask, |
| 626 | (int (*) (int)) |
| 627 | return_one); |
| 628 | current_target.to_read_description = NULL; |
| 629 | #undef de_fault |
| 630 | |
| 631 | /* Finally, position the target-stack beneath the squashed |
| 632 | "current_target". That way code looking for a non-inherited |
| 633 | target method can quickly and simply find it. */ |
| 634 | current_target.beneath = target_stack; |
| 635 | |
| 636 | if (targetdebug) |
| 637 | setup_target_debug (); |
| 638 | } |
| 639 | |
| 640 | /* Mark OPS as a running target. This reverses the effect |
| 641 | of target_mark_exited. */ |
| 642 | |
| 643 | void |
| 644 | target_mark_running (struct target_ops *ops) |
| 645 | { |
| 646 | struct target_ops *t; |
| 647 | |
| 648 | for (t = target_stack; t != NULL; t = t->beneath) |
| 649 | if (t == ops) |
| 650 | break; |
| 651 | if (t == NULL) |
| 652 | internal_error (__FILE__, __LINE__, |
| 653 | "Attempted to mark unpushed target \"%s\" as running", |
| 654 | ops->to_shortname); |
| 655 | |
| 656 | ops->to_has_execution = 1; |
| 657 | ops->to_has_all_memory = 1; |
| 658 | ops->to_has_memory = 1; |
| 659 | ops->to_has_stack = 1; |
| 660 | ops->to_has_registers = 1; |
| 661 | |
| 662 | update_current_target (); |
| 663 | } |
| 664 | |
| 665 | /* Mark OPS as a non-running target. This reverses the effect |
| 666 | of target_mark_running. */ |
| 667 | |
| 668 | void |
| 669 | target_mark_exited (struct target_ops *ops) |
| 670 | { |
| 671 | struct target_ops *t; |
| 672 | |
| 673 | for (t = target_stack; t != NULL; t = t->beneath) |
| 674 | if (t == ops) |
| 675 | break; |
| 676 | if (t == NULL) |
| 677 | internal_error (__FILE__, __LINE__, |
| 678 | "Attempted to mark unpushed target \"%s\" as running", |
| 679 | ops->to_shortname); |
| 680 | |
| 681 | ops->to_has_execution = 0; |
| 682 | ops->to_has_all_memory = 0; |
| 683 | ops->to_has_memory = 0; |
| 684 | ops->to_has_stack = 0; |
| 685 | ops->to_has_registers = 0; |
| 686 | |
| 687 | update_current_target (); |
| 688 | } |
| 689 | |
| 690 | /* Push a new target type into the stack of the existing target accessors, |
| 691 | possibly superseding some of the existing accessors. |
| 692 | |
| 693 | Result is zero if the pushed target ended up on top of the stack, |
| 694 | nonzero if at least one target is on top of it. |
| 695 | |
| 696 | Rather than allow an empty stack, we always have the dummy target at |
| 697 | the bottom stratum, so we can call the function vectors without |
| 698 | checking them. */ |
| 699 | |
| 700 | int |
| 701 | push_target (struct target_ops *t) |
| 702 | { |
| 703 | struct target_ops **cur; |
| 704 | |
| 705 | /* Check magic number. If wrong, it probably means someone changed |
| 706 | the struct definition, but not all the places that initialize one. */ |
| 707 | if (t->to_magic != OPS_MAGIC) |
| 708 | { |
| 709 | fprintf_unfiltered (gdb_stderr, |
| 710 | "Magic number of %s target struct wrong\n", |
| 711 | t->to_shortname); |
| 712 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
| 713 | } |
| 714 | |
| 715 | /* Find the proper stratum to install this target in. */ |
| 716 | for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) |
| 717 | { |
| 718 | if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum) |
| 719 | break; |
| 720 | } |
| 721 | |
| 722 | /* If there's already targets at this stratum, remove them. */ |
| 723 | /* FIXME: cagney/2003-10-15: I think this should be popping all |
| 724 | targets to CUR, and not just those at this stratum level. */ |
| 725 | while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum) |
| 726 | { |
| 727 | /* There's already something at this stratum level. Close it, |
| 728 | and un-hook it from the stack. */ |
| 729 | struct target_ops *tmp = (*cur); |
| 730 | (*cur) = (*cur)->beneath; |
| 731 | tmp->beneath = NULL; |
| 732 | target_close (tmp, 0); |
| 733 | } |
| 734 | |
| 735 | /* We have removed all targets in our stratum, now add the new one. */ |
| 736 | t->beneath = (*cur); |
| 737 | (*cur) = t; |
| 738 | |
| 739 | update_current_target (); |
| 740 | |
| 741 | /* Not on top? */ |
| 742 | return (t != target_stack); |
| 743 | } |
| 744 | |
| 745 | /* Remove a target_ops vector from the stack, wherever it may be. |
| 746 | Return how many times it was removed (0 or 1). */ |
| 747 | |
| 748 | int |
| 749 | unpush_target (struct target_ops *t) |
| 750 | { |
| 751 | struct target_ops **cur; |
| 752 | struct target_ops *tmp; |
| 753 | |
| 754 | /* Look for the specified target. Note that we assume that a target |
| 755 | can only occur once in the target stack. */ |
| 756 | |
| 757 | for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) |
| 758 | { |
| 759 | if ((*cur) == t) |
| 760 | break; |
| 761 | } |
| 762 | |
| 763 | if ((*cur) == NULL) |
| 764 | return 0; /* Didn't find target_ops, quit now */ |
| 765 | |
| 766 | /* NOTE: cagney/2003-12-06: In '94 the close call was made |
| 767 | unconditional by moving it to before the above check that the |
| 768 | target was in the target stack (something about "Change the way |
| 769 | pushing and popping of targets work to support target overlays |
| 770 | and inheritance"). This doesn't make much sense - only open |
| 771 | targets should be closed. */ |
| 772 | target_close (t, 0); |
| 773 | |
| 774 | /* Unchain the target */ |
| 775 | tmp = (*cur); |
| 776 | (*cur) = (*cur)->beneath; |
| 777 | tmp->beneath = NULL; |
| 778 | |
| 779 | update_current_target (); |
| 780 | |
| 781 | return 1; |
| 782 | } |
| 783 | |
| 784 | void |
| 785 | pop_target (void) |
| 786 | { |
| 787 | target_close (target_stack, 0); /* Let it clean up */ |
| 788 | if (unpush_target (target_stack) == 1) |
| 789 | return; |
| 790 | |
| 791 | fprintf_unfiltered (gdb_stderr, |
| 792 | "pop_target couldn't find target %s\n", |
| 793 | current_target.to_shortname); |
| 794 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
| 795 | } |
| 796 | |
| 797 | void |
| 798 | pop_all_targets_above (enum strata above_stratum, int quitting) |
| 799 | { |
| 800 | while ((int) (current_target.to_stratum) > (int) above_stratum) |
| 801 | { |
| 802 | target_close (target_stack, quitting); |
| 803 | if (!unpush_target (target_stack)) |
| 804 | { |
| 805 | fprintf_unfiltered (gdb_stderr, |
| 806 | "pop_all_targets couldn't find target %s\n", |
| 807 | target_stack->to_shortname); |
| 808 | internal_error (__FILE__, __LINE__, |
| 809 | _("failed internal consistency check")); |
| 810 | break; |
| 811 | } |
| 812 | } |
| 813 | } |
| 814 | |
| 815 | void |
| 816 | pop_all_targets (int quitting) |
| 817 | { |
| 818 | pop_all_targets_above (dummy_stratum, quitting); |
| 819 | } |
| 820 | |
| 821 | /* Using the objfile specified in OBJFILE, find the address for the |
| 822 | current thread's thread-local storage with offset OFFSET. */ |
| 823 | CORE_ADDR |
| 824 | target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) |
| 825 | { |
| 826 | volatile CORE_ADDR addr = 0; |
| 827 | |
| 828 | if (target_get_thread_local_address_p () |
| 829 | && gdbarch_fetch_tls_load_module_address_p (target_gdbarch)) |
| 830 | { |
| 831 | ptid_t ptid = inferior_ptid; |
| 832 | volatile struct gdb_exception ex; |
| 833 | |
| 834 | TRY_CATCH (ex, RETURN_MASK_ALL) |
| 835 | { |
| 836 | CORE_ADDR lm_addr; |
| 837 | |
| 838 | /* Fetch the load module address for this objfile. */ |
| 839 | lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch, |
| 840 | objfile); |
| 841 | /* If it's 0, throw the appropriate exception. */ |
| 842 | if (lm_addr == 0) |
| 843 | throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR, |
| 844 | _("TLS load module not found")); |
| 845 | |
| 846 | addr = target_get_thread_local_address (ptid, lm_addr, offset); |
| 847 | } |
| 848 | /* If an error occurred, print TLS related messages here. Otherwise, |
| 849 | throw the error to some higher catcher. */ |
| 850 | if (ex.reason < 0) |
| 851 | { |
| 852 | int objfile_is_library = (objfile->flags & OBJF_SHARED); |
| 853 | |
| 854 | switch (ex.error) |
| 855 | { |
| 856 | case TLS_NO_LIBRARY_SUPPORT_ERROR: |
| 857 | error (_("Cannot find thread-local variables in this thread library.")); |
| 858 | break; |
| 859 | case TLS_LOAD_MODULE_NOT_FOUND_ERROR: |
| 860 | if (objfile_is_library) |
| 861 | error (_("Cannot find shared library `%s' in dynamic" |
| 862 | " linker's load module list"), objfile->name); |
| 863 | else |
| 864 | error (_("Cannot find executable file `%s' in dynamic" |
| 865 | " linker's load module list"), objfile->name); |
| 866 | break; |
| 867 | case TLS_NOT_ALLOCATED_YET_ERROR: |
| 868 | if (objfile_is_library) |
| 869 | error (_("The inferior has not yet allocated storage for" |
| 870 | " thread-local variables in\n" |
| 871 | "the shared library `%s'\n" |
| 872 | "for %s"), |
| 873 | objfile->name, target_pid_to_str (ptid)); |
| 874 | else |
| 875 | error (_("The inferior has not yet allocated storage for" |
| 876 | " thread-local variables in\n" |
| 877 | "the executable `%s'\n" |
| 878 | "for %s"), |
| 879 | objfile->name, target_pid_to_str (ptid)); |
| 880 | break; |
| 881 | case TLS_GENERIC_ERROR: |
| 882 | if (objfile_is_library) |
| 883 | error (_("Cannot find thread-local storage for %s, " |
| 884 | "shared library %s:\n%s"), |
| 885 | target_pid_to_str (ptid), |
| 886 | objfile->name, ex.message); |
| 887 | else |
| 888 | error (_("Cannot find thread-local storage for %s, " |
| 889 | "executable file %s:\n%s"), |
| 890 | target_pid_to_str (ptid), |
| 891 | objfile->name, ex.message); |
| 892 | break; |
| 893 | default: |
| 894 | throw_exception (ex); |
| 895 | break; |
| 896 | } |
| 897 | } |
| 898 | } |
| 899 | /* It wouldn't be wrong here to try a gdbarch method, too; finding |
| 900 | TLS is an ABI-specific thing. But we don't do that yet. */ |
| 901 | else |
| 902 | error (_("Cannot find thread-local variables on this target")); |
| 903 | |
| 904 | return addr; |
| 905 | } |
| 906 | |
| 907 | #undef MIN |
| 908 | #define MIN(A, B) (((A) <= (B)) ? (A) : (B)) |
| 909 | |
| 910 | /* target_read_string -- read a null terminated string, up to LEN bytes, |
| 911 | from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful. |
| 912 | Set *STRING to a pointer to malloc'd memory containing the data; the caller |
| 913 | is responsible for freeing it. Return the number of bytes successfully |
| 914 | read. */ |
| 915 | |
| 916 | int |
| 917 | target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop) |
| 918 | { |
| 919 | int tlen, origlen, offset, i; |
| 920 | gdb_byte buf[4]; |
| 921 | int errcode = 0; |
| 922 | char *buffer; |
| 923 | int buffer_allocated; |
| 924 | char *bufptr; |
| 925 | unsigned int nbytes_read = 0; |
| 926 | |
| 927 | gdb_assert (string); |
| 928 | |
| 929 | /* Small for testing. */ |
| 930 | buffer_allocated = 4; |
| 931 | buffer = xmalloc (buffer_allocated); |
| 932 | bufptr = buffer; |
| 933 | |
| 934 | origlen = len; |
| 935 | |
| 936 | while (len > 0) |
| 937 | { |
| 938 | tlen = MIN (len, 4 - (memaddr & 3)); |
| 939 | offset = memaddr & 3; |
| 940 | |
| 941 | errcode = target_read_memory (memaddr & ~3, buf, sizeof buf); |
| 942 | if (errcode != 0) |
| 943 | { |
| 944 | /* The transfer request might have crossed the boundary to an |
| 945 | unallocated region of memory. Retry the transfer, requesting |
| 946 | a single byte. */ |
| 947 | tlen = 1; |
| 948 | offset = 0; |
| 949 | errcode = target_read_memory (memaddr, buf, 1); |
| 950 | if (errcode != 0) |
| 951 | goto done; |
| 952 | } |
| 953 | |
| 954 | if (bufptr - buffer + tlen > buffer_allocated) |
| 955 | { |
| 956 | unsigned int bytes; |
| 957 | bytes = bufptr - buffer; |
| 958 | buffer_allocated *= 2; |
| 959 | buffer = xrealloc (buffer, buffer_allocated); |
| 960 | bufptr = buffer + bytes; |
| 961 | } |
| 962 | |
| 963 | for (i = 0; i < tlen; i++) |
| 964 | { |
| 965 | *bufptr++ = buf[i + offset]; |
| 966 | if (buf[i + offset] == '\000') |
| 967 | { |
| 968 | nbytes_read += i + 1; |
| 969 | goto done; |
| 970 | } |
| 971 | } |
| 972 | |
| 973 | memaddr += tlen; |
| 974 | len -= tlen; |
| 975 | nbytes_read += tlen; |
| 976 | } |
| 977 | done: |
| 978 | *string = buffer; |
| 979 | if (errnop != NULL) |
| 980 | *errnop = errcode; |
| 981 | return nbytes_read; |
| 982 | } |
| 983 | |
| 984 | /* Find a section containing ADDR. */ |
| 985 | struct section_table * |
| 986 | target_section_by_addr (struct target_ops *target, CORE_ADDR addr) |
| 987 | { |
| 988 | struct section_table *secp; |
| 989 | for (secp = target->to_sections; |
| 990 | secp < target->to_sections_end; |
| 991 | secp++) |
| 992 | { |
| 993 | if (addr >= secp->addr && addr < secp->endaddr) |
| 994 | return secp; |
| 995 | } |
| 996 | return NULL; |
| 997 | } |
| 998 | |
| 999 | /* Perform a partial memory transfer. The arguments and return |
| 1000 | value are just as for target_xfer_partial. */ |
| 1001 | |
| 1002 | static LONGEST |
| 1003 | memory_xfer_partial (struct target_ops *ops, void *readbuf, const void *writebuf, |
| 1004 | ULONGEST memaddr, LONGEST len) |
| 1005 | { |
| 1006 | LONGEST res; |
| 1007 | int reg_len; |
| 1008 | struct mem_region *region; |
| 1009 | |
| 1010 | /* Zero length requests are ok and require no work. */ |
| 1011 | if (len == 0) |
| 1012 | return 0; |
| 1013 | |
| 1014 | /* Try the executable file, if "trust-readonly-sections" is set. */ |
| 1015 | if (readbuf != NULL && trust_readonly) |
| 1016 | { |
| 1017 | struct section_table *secp; |
| 1018 | |
| 1019 | secp = target_section_by_addr (ops, memaddr); |
| 1020 | if (secp != NULL |
| 1021 | && (bfd_get_section_flags (secp->bfd, secp->the_bfd_section) |
| 1022 | & SEC_READONLY)) |
| 1023 | return xfer_memory (memaddr, readbuf, len, 0, NULL, ops); |
| 1024 | } |
| 1025 | |
| 1026 | /* Likewise for accesses to unmapped overlay sections. */ |
| 1027 | if (readbuf != NULL && overlay_debugging) |
| 1028 | { |
| 1029 | struct obj_section *section = find_pc_overlay (memaddr); |
| 1030 | if (pc_in_unmapped_range (memaddr, section)) |
| 1031 | return xfer_memory (memaddr, readbuf, len, 0, NULL, ops); |
| 1032 | } |
| 1033 | |
| 1034 | /* Try GDB's internal data cache. */ |
| 1035 | region = lookup_mem_region (memaddr); |
| 1036 | /* region->hi == 0 means there's no upper bound. */ |
| 1037 | if (memaddr + len < region->hi || region->hi == 0) |
| 1038 | reg_len = len; |
| 1039 | else |
| 1040 | reg_len = region->hi - memaddr; |
| 1041 | |
| 1042 | switch (region->attrib.mode) |
| 1043 | { |
| 1044 | case MEM_RO: |
| 1045 | if (writebuf != NULL) |
| 1046 | return -1; |
| 1047 | break; |
| 1048 | |
| 1049 | case MEM_WO: |
| 1050 | if (readbuf != NULL) |
| 1051 | return -1; |
| 1052 | break; |
| 1053 | |
| 1054 | case MEM_FLASH: |
| 1055 | /* We only support writing to flash during "load" for now. */ |
| 1056 | if (writebuf != NULL) |
| 1057 | error (_("Writing to flash memory forbidden in this context")); |
| 1058 | break; |
| 1059 | |
| 1060 | case MEM_NONE: |
| 1061 | return -1; |
| 1062 | } |
| 1063 | |
| 1064 | if (region->attrib.cache) |
| 1065 | { |
| 1066 | /* FIXME drow/2006-08-09: This call discards OPS, so the raw |
| 1067 | memory request will start back at current_target. */ |
| 1068 | if (readbuf != NULL) |
| 1069 | res = dcache_xfer_memory (target_dcache, memaddr, readbuf, |
| 1070 | reg_len, 0); |
| 1071 | else |
| 1072 | /* FIXME drow/2006-08-09: If we're going to preserve const |
| 1073 | correctness dcache_xfer_memory should take readbuf and |
| 1074 | writebuf. */ |
| 1075 | res = dcache_xfer_memory (target_dcache, memaddr, |
| 1076 | (void *) writebuf, |
| 1077 | reg_len, 1); |
| 1078 | if (res <= 0) |
| 1079 | return -1; |
| 1080 | else |
| 1081 | { |
| 1082 | if (readbuf && !show_memory_breakpoints) |
| 1083 | breakpoint_restore_shadows (readbuf, memaddr, reg_len); |
| 1084 | return res; |
| 1085 | } |
| 1086 | } |
| 1087 | |
| 1088 | /* If none of those methods found the memory we wanted, fall back |
| 1089 | to a target partial transfer. Normally a single call to |
| 1090 | to_xfer_partial is enough; if it doesn't recognize an object |
| 1091 | it will call the to_xfer_partial of the next target down. |
| 1092 | But for memory this won't do. Memory is the only target |
| 1093 | object which can be read from more than one valid target. |
| 1094 | A core file, for instance, could have some of memory but |
| 1095 | delegate other bits to the target below it. So, we must |
| 1096 | manually try all targets. */ |
| 1097 | |
| 1098 | do |
| 1099 | { |
| 1100 | res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, |
| 1101 | readbuf, writebuf, memaddr, reg_len); |
| 1102 | if (res > 0) |
| 1103 | break; |
| 1104 | |
| 1105 | /* We want to continue past core files to executables, but not |
| 1106 | past a running target's memory. */ |
| 1107 | if (ops->to_has_all_memory) |
| 1108 | break; |
| 1109 | |
| 1110 | ops = ops->beneath; |
| 1111 | } |
| 1112 | while (ops != NULL); |
| 1113 | |
| 1114 | if (readbuf && !show_memory_breakpoints) |
| 1115 | breakpoint_restore_shadows (readbuf, memaddr, reg_len); |
| 1116 | |
| 1117 | /* If we still haven't got anything, return the last error. We |
| 1118 | give up. */ |
| 1119 | return res; |
| 1120 | } |
| 1121 | |
| 1122 | static void |
| 1123 | restore_show_memory_breakpoints (void *arg) |
| 1124 | { |
| 1125 | show_memory_breakpoints = (uintptr_t) arg; |
| 1126 | } |
| 1127 | |
| 1128 | struct cleanup * |
| 1129 | make_show_memory_breakpoints_cleanup (int show) |
| 1130 | { |
| 1131 | int current = show_memory_breakpoints; |
| 1132 | show_memory_breakpoints = show; |
| 1133 | |
| 1134 | return make_cleanup (restore_show_memory_breakpoints, |
| 1135 | (void *) (uintptr_t) current); |
| 1136 | } |
| 1137 | |
| 1138 | static LONGEST |
| 1139 | target_xfer_partial (struct target_ops *ops, |
| 1140 | enum target_object object, const char *annex, |
| 1141 | void *readbuf, const void *writebuf, |
| 1142 | ULONGEST offset, LONGEST len) |
| 1143 | { |
| 1144 | LONGEST retval; |
| 1145 | |
| 1146 | gdb_assert (ops->to_xfer_partial != NULL); |
| 1147 | |
| 1148 | /* If this is a memory transfer, let the memory-specific code |
| 1149 | have a look at it instead. Memory transfers are more |
| 1150 | complicated. */ |
| 1151 | if (object == TARGET_OBJECT_MEMORY) |
| 1152 | retval = memory_xfer_partial (ops, readbuf, writebuf, offset, len); |
| 1153 | else |
| 1154 | { |
| 1155 | enum target_object raw_object = object; |
| 1156 | |
| 1157 | /* If this is a raw memory transfer, request the normal |
| 1158 | memory object from other layers. */ |
| 1159 | if (raw_object == TARGET_OBJECT_RAW_MEMORY) |
| 1160 | raw_object = TARGET_OBJECT_MEMORY; |
| 1161 | |
| 1162 | retval = ops->to_xfer_partial (ops, raw_object, annex, readbuf, |
| 1163 | writebuf, offset, len); |
| 1164 | } |
| 1165 | |
| 1166 | if (targetdebug) |
| 1167 | { |
| 1168 | const unsigned char *myaddr = NULL; |
| 1169 | |
| 1170 | fprintf_unfiltered (gdb_stdlog, |
| 1171 | "%s:target_xfer_partial (%d, %s, 0x%lx, 0x%lx, %s, %s) = %s", |
| 1172 | ops->to_shortname, |
| 1173 | (int) object, |
| 1174 | (annex ? annex : "(null)"), |
| 1175 | (long) readbuf, (long) writebuf, |
| 1176 | core_addr_to_string_nz (offset), |
| 1177 | plongest (len), plongest (retval)); |
| 1178 | |
| 1179 | if (readbuf) |
| 1180 | myaddr = readbuf; |
| 1181 | if (writebuf) |
| 1182 | myaddr = writebuf; |
| 1183 | if (retval > 0 && myaddr != NULL) |
| 1184 | { |
| 1185 | int i; |
| 1186 | |
| 1187 | fputs_unfiltered (", bytes =", gdb_stdlog); |
| 1188 | for (i = 0; i < retval; i++) |
| 1189 | { |
| 1190 | if ((((long) &(myaddr[i])) & 0xf) == 0) |
| 1191 | { |
| 1192 | if (targetdebug < 2 && i > 0) |
| 1193 | { |
| 1194 | fprintf_unfiltered (gdb_stdlog, " ..."); |
| 1195 | break; |
| 1196 | } |
| 1197 | fprintf_unfiltered (gdb_stdlog, "\n"); |
| 1198 | } |
| 1199 | |
| 1200 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
| 1201 | } |
| 1202 | } |
| 1203 | |
| 1204 | fputc_unfiltered ('\n', gdb_stdlog); |
| 1205 | } |
| 1206 | return retval; |
| 1207 | } |
| 1208 | |
| 1209 | /* Read LEN bytes of target memory at address MEMADDR, placing the results in |
| 1210 | GDB's memory at MYADDR. Returns either 0 for success or an errno value |
| 1211 | if any error occurs. |
| 1212 | |
| 1213 | If an error occurs, no guarantee is made about the contents of the data at |
| 1214 | MYADDR. In particular, the caller should not depend upon partial reads |
| 1215 | filling the buffer with good data. There is no way for the caller to know |
| 1216 | how much good data might have been transfered anyway. Callers that can |
| 1217 | deal with partial reads should call target_read (which will retry until |
| 1218 | it makes no progress, and then return how much was transferred). */ |
| 1219 | |
| 1220 | int |
| 1221 | target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len) |
| 1222 | { |
| 1223 | if (target_read (¤t_target, TARGET_OBJECT_MEMORY, NULL, |
| 1224 | myaddr, memaddr, len) == len) |
| 1225 | return 0; |
| 1226 | else |
| 1227 | return EIO; |
| 1228 | } |
| 1229 | |
| 1230 | int |
| 1231 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, int len) |
| 1232 | { |
| 1233 | if (target_write (¤t_target, TARGET_OBJECT_MEMORY, NULL, |
| 1234 | myaddr, memaddr, len) == len) |
| 1235 | return 0; |
| 1236 | else |
| 1237 | return EIO; |
| 1238 | } |
| 1239 | |
| 1240 | /* Fetch the target's memory map. */ |
| 1241 | |
| 1242 | VEC(mem_region_s) * |
| 1243 | target_memory_map (void) |
| 1244 | { |
| 1245 | VEC(mem_region_s) *result; |
| 1246 | struct mem_region *last_one, *this_one; |
| 1247 | int ix; |
| 1248 | struct target_ops *t; |
| 1249 | |
| 1250 | if (targetdebug) |
| 1251 | fprintf_unfiltered (gdb_stdlog, "target_memory_map ()\n"); |
| 1252 | |
| 1253 | for (t = current_target.beneath; t != NULL; t = t->beneath) |
| 1254 | if (t->to_memory_map != NULL) |
| 1255 | break; |
| 1256 | |
| 1257 | if (t == NULL) |
| 1258 | return NULL; |
| 1259 | |
| 1260 | result = t->to_memory_map (t); |
| 1261 | if (result == NULL) |
| 1262 | return NULL; |
| 1263 | |
| 1264 | qsort (VEC_address (mem_region_s, result), |
| 1265 | VEC_length (mem_region_s, result), |
| 1266 | sizeof (struct mem_region), mem_region_cmp); |
| 1267 | |
| 1268 | /* Check that regions do not overlap. Simultaneously assign |
| 1269 | a numbering for the "mem" commands to use to refer to |
| 1270 | each region. */ |
| 1271 | last_one = NULL; |
| 1272 | for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++) |
| 1273 | { |
| 1274 | this_one->number = ix; |
| 1275 | |
| 1276 | if (last_one && last_one->hi > this_one->lo) |
| 1277 | { |
| 1278 | warning (_("Overlapping regions in memory map: ignoring")); |
| 1279 | VEC_free (mem_region_s, result); |
| 1280 | return NULL; |
| 1281 | } |
| 1282 | last_one = this_one; |
| 1283 | } |
| 1284 | |
| 1285 | return result; |
| 1286 | } |
| 1287 | |
| 1288 | void |
| 1289 | target_flash_erase (ULONGEST address, LONGEST length) |
| 1290 | { |
| 1291 | struct target_ops *t; |
| 1292 | |
| 1293 | for (t = current_target.beneath; t != NULL; t = t->beneath) |
| 1294 | if (t->to_flash_erase != NULL) |
| 1295 | { |
| 1296 | if (targetdebug) |
| 1297 | fprintf_unfiltered (gdb_stdlog, "target_flash_erase (%s, %s)\n", |
| 1298 | paddr (address), phex (length, 0)); |
| 1299 | t->to_flash_erase (t, address, length); |
| 1300 | return; |
| 1301 | } |
| 1302 | |
| 1303 | tcomplain (); |
| 1304 | } |
| 1305 | |
| 1306 | void |
| 1307 | target_flash_done (void) |
| 1308 | { |
| 1309 | struct target_ops *t; |
| 1310 | |
| 1311 | for (t = current_target.beneath; t != NULL; t = t->beneath) |
| 1312 | if (t->to_flash_done != NULL) |
| 1313 | { |
| 1314 | if (targetdebug) |
| 1315 | fprintf_unfiltered (gdb_stdlog, "target_flash_done\n"); |
| 1316 | t->to_flash_done (t); |
| 1317 | return; |
| 1318 | } |
| 1319 | |
| 1320 | tcomplain (); |
| 1321 | } |
| 1322 | |
| 1323 | #ifndef target_stopped_data_address_p |
| 1324 | int |
| 1325 | target_stopped_data_address_p (struct target_ops *target) |
| 1326 | { |
| 1327 | if (target->to_stopped_data_address |
| 1328 | == (int (*) (struct target_ops *, CORE_ADDR *)) return_zero) |
| 1329 | return 0; |
| 1330 | if (target->to_stopped_data_address == debug_to_stopped_data_address |
| 1331 | && (debug_target.to_stopped_data_address |
| 1332 | == (int (*) (struct target_ops *, CORE_ADDR *)) return_zero)) |
| 1333 | return 0; |
| 1334 | return 1; |
| 1335 | } |
| 1336 | #endif |
| 1337 | |
| 1338 | static void |
| 1339 | show_trust_readonly (struct ui_file *file, int from_tty, |
| 1340 | struct cmd_list_element *c, const char *value) |
| 1341 | { |
| 1342 | fprintf_filtered (file, _("\ |
| 1343 | Mode for reading from readonly sections is %s.\n"), |
| 1344 | value); |
| 1345 | } |
| 1346 | |
| 1347 | /* More generic transfers. */ |
| 1348 | |
| 1349 | static LONGEST |
| 1350 | default_xfer_partial (struct target_ops *ops, enum target_object object, |
| 1351 | const char *annex, gdb_byte *readbuf, |
| 1352 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) |
| 1353 | { |
| 1354 | if (object == TARGET_OBJECT_MEMORY |
| 1355 | && ops->deprecated_xfer_memory != NULL) |
| 1356 | /* If available, fall back to the target's |
| 1357 | "deprecated_xfer_memory" method. */ |
| 1358 | { |
| 1359 | int xfered = -1; |
| 1360 | errno = 0; |
| 1361 | if (writebuf != NULL) |
| 1362 | { |
| 1363 | void *buffer = xmalloc (len); |
| 1364 | struct cleanup *cleanup = make_cleanup (xfree, buffer); |
| 1365 | memcpy (buffer, writebuf, len); |
| 1366 | xfered = ops->deprecated_xfer_memory (offset, buffer, len, |
| 1367 | 1/*write*/, NULL, ops); |
| 1368 | do_cleanups (cleanup); |
| 1369 | } |
| 1370 | if (readbuf != NULL) |
| 1371 | xfered = ops->deprecated_xfer_memory (offset, readbuf, len, |
| 1372 | 0/*read*/, NULL, ops); |
| 1373 | if (xfered > 0) |
| 1374 | return xfered; |
| 1375 | else if (xfered == 0 && errno == 0) |
| 1376 | /* "deprecated_xfer_memory" uses 0, cross checked against |
| 1377 | ERRNO as one indication of an error. */ |
| 1378 | return 0; |
| 1379 | else |
| 1380 | return -1; |
| 1381 | } |
| 1382 | else if (ops->beneath != NULL) |
| 1383 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
| 1384 | readbuf, writebuf, offset, len); |
| 1385 | else |
| 1386 | return -1; |
| 1387 | } |
| 1388 | |
| 1389 | /* The xfer_partial handler for the topmost target. Unlike the default, |
| 1390 | it does not need to handle memory specially; it just passes all |
| 1391 | requests down the stack. */ |
| 1392 | |
| 1393 | static LONGEST |
| 1394 | current_xfer_partial (struct target_ops *ops, enum target_object object, |
| 1395 | const char *annex, gdb_byte *readbuf, |
| 1396 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) |
| 1397 | { |
| 1398 | if (ops->beneath != NULL) |
| 1399 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
| 1400 | readbuf, writebuf, offset, len); |
| 1401 | else |
| 1402 | return -1; |
| 1403 | } |
| 1404 | |
| 1405 | /* Target vector read/write partial wrapper functions. |
| 1406 | |
| 1407 | NOTE: cagney/2003-10-21: I wonder if having "to_xfer_partial |
| 1408 | (inbuf, outbuf)", instead of separate read/write methods, make life |
| 1409 | easier. */ |
| 1410 | |
| 1411 | static LONGEST |
| 1412 | target_read_partial (struct target_ops *ops, |
| 1413 | enum target_object object, |
| 1414 | const char *annex, gdb_byte *buf, |
| 1415 | ULONGEST offset, LONGEST len) |
| 1416 | { |
| 1417 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len); |
| 1418 | } |
| 1419 | |
| 1420 | static LONGEST |
| 1421 | target_write_partial (struct target_ops *ops, |
| 1422 | enum target_object object, |
| 1423 | const char *annex, const gdb_byte *buf, |
| 1424 | ULONGEST offset, LONGEST len) |
| 1425 | { |
| 1426 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len); |
| 1427 | } |
| 1428 | |
| 1429 | /* Wrappers to perform the full transfer. */ |
| 1430 | LONGEST |
| 1431 | target_read (struct target_ops *ops, |
| 1432 | enum target_object object, |
| 1433 | const char *annex, gdb_byte *buf, |
| 1434 | ULONGEST offset, LONGEST len) |
| 1435 | { |
| 1436 | LONGEST xfered = 0; |
| 1437 | while (xfered < len) |
| 1438 | { |
| 1439 | LONGEST xfer = target_read_partial (ops, object, annex, |
| 1440 | (gdb_byte *) buf + xfered, |
| 1441 | offset + xfered, len - xfered); |
| 1442 | /* Call an observer, notifying them of the xfer progress? */ |
| 1443 | if (xfer == 0) |
| 1444 | return xfered; |
| 1445 | if (xfer < 0) |
| 1446 | return -1; |
| 1447 | xfered += xfer; |
| 1448 | QUIT; |
| 1449 | } |
| 1450 | return len; |
| 1451 | } |
| 1452 | |
| 1453 | LONGEST |
| 1454 | target_read_until_error (struct target_ops *ops, |
| 1455 | enum target_object object, |
| 1456 | const char *annex, gdb_byte *buf, |
| 1457 | ULONGEST offset, LONGEST len) |
| 1458 | { |
| 1459 | LONGEST xfered = 0; |
| 1460 | while (xfered < len) |
| 1461 | { |
| 1462 | LONGEST xfer = target_read_partial (ops, object, annex, |
| 1463 | (gdb_byte *) buf + xfered, |
| 1464 | offset + xfered, len - xfered); |
| 1465 | /* Call an observer, notifying them of the xfer progress? */ |
| 1466 | if (xfer == 0) |
| 1467 | return xfered; |
| 1468 | if (xfer < 0) |
| 1469 | { |
| 1470 | /* We've got an error. Try to read in smaller blocks. */ |
| 1471 | ULONGEST start = offset + xfered; |
| 1472 | ULONGEST remaining = len - xfered; |
| 1473 | ULONGEST half; |
| 1474 | |
| 1475 | /* If an attempt was made to read a random memory address, |
| 1476 | it's likely that the very first byte is not accessible. |
| 1477 | Try reading the first byte, to avoid doing log N tries |
| 1478 | below. */ |
| 1479 | xfer = target_read_partial (ops, object, annex, |
| 1480 | (gdb_byte *) buf + xfered, start, 1); |
| 1481 | if (xfer <= 0) |
| 1482 | return xfered; |
| 1483 | start += 1; |
| 1484 | remaining -= 1; |
| 1485 | half = remaining/2; |
| 1486 | |
| 1487 | while (half > 0) |
| 1488 | { |
| 1489 | xfer = target_read_partial (ops, object, annex, |
| 1490 | (gdb_byte *) buf + xfered, |
| 1491 | start, half); |
| 1492 | if (xfer == 0) |
| 1493 | return xfered; |
| 1494 | if (xfer < 0) |
| 1495 | { |
| 1496 | remaining = half; |
| 1497 | } |
| 1498 | else |
| 1499 | { |
| 1500 | /* We have successfully read the first half. So, the |
| 1501 | error must be in the second half. Adjust start and |
| 1502 | remaining to point at the second half. */ |
| 1503 | xfered += xfer; |
| 1504 | start += xfer; |
| 1505 | remaining -= xfer; |
| 1506 | } |
| 1507 | half = remaining/2; |
| 1508 | } |
| 1509 | |
| 1510 | return xfered; |
| 1511 | } |
| 1512 | xfered += xfer; |
| 1513 | QUIT; |
| 1514 | } |
| 1515 | return len; |
| 1516 | } |
| 1517 | |
| 1518 | |
| 1519 | /* An alternative to target_write with progress callbacks. */ |
| 1520 | |
| 1521 | LONGEST |
| 1522 | target_write_with_progress (struct target_ops *ops, |
| 1523 | enum target_object object, |
| 1524 | const char *annex, const gdb_byte *buf, |
| 1525 | ULONGEST offset, LONGEST len, |
| 1526 | void (*progress) (ULONGEST, void *), void *baton) |
| 1527 | { |
| 1528 | LONGEST xfered = 0; |
| 1529 | |
| 1530 | /* Give the progress callback a chance to set up. */ |
| 1531 | if (progress) |
| 1532 | (*progress) (0, baton); |
| 1533 | |
| 1534 | while (xfered < len) |
| 1535 | { |
| 1536 | LONGEST xfer = target_write_partial (ops, object, annex, |
| 1537 | (gdb_byte *) buf + xfered, |
| 1538 | offset + xfered, len - xfered); |
| 1539 | |
| 1540 | if (xfer == 0) |
| 1541 | return xfered; |
| 1542 | if (xfer < 0) |
| 1543 | return -1; |
| 1544 | |
| 1545 | if (progress) |
| 1546 | (*progress) (xfer, baton); |
| 1547 | |
| 1548 | xfered += xfer; |
| 1549 | QUIT; |
| 1550 | } |
| 1551 | return len; |
| 1552 | } |
| 1553 | |
| 1554 | LONGEST |
| 1555 | target_write (struct target_ops *ops, |
| 1556 | enum target_object object, |
| 1557 | const char *annex, const gdb_byte *buf, |
| 1558 | ULONGEST offset, LONGEST len) |
| 1559 | { |
| 1560 | return target_write_with_progress (ops, object, annex, buf, offset, len, |
| 1561 | NULL, NULL); |
| 1562 | } |
| 1563 | |
| 1564 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
| 1565 | the size of the transferred data. PADDING additional bytes are |
| 1566 | available in *BUF_P. This is a helper function for |
| 1567 | target_read_alloc; see the declaration of that function for more |
| 1568 | information. */ |
| 1569 | |
| 1570 | static LONGEST |
| 1571 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, |
| 1572 | const char *annex, gdb_byte **buf_p, int padding) |
| 1573 | { |
| 1574 | size_t buf_alloc, buf_pos; |
| 1575 | gdb_byte *buf; |
| 1576 | LONGEST n; |
| 1577 | |
| 1578 | /* This function does not have a length parameter; it reads the |
| 1579 | entire OBJECT). Also, it doesn't support objects fetched partly |
| 1580 | from one target and partly from another (in a different stratum, |
| 1581 | e.g. a core file and an executable). Both reasons make it |
| 1582 | unsuitable for reading memory. */ |
| 1583 | gdb_assert (object != TARGET_OBJECT_MEMORY); |
| 1584 | |
| 1585 | /* Start by reading up to 4K at a time. The target will throttle |
| 1586 | this number down if necessary. */ |
| 1587 | buf_alloc = 4096; |
| 1588 | buf = xmalloc (buf_alloc); |
| 1589 | buf_pos = 0; |
| 1590 | while (1) |
| 1591 | { |
| 1592 | n = target_read_partial (ops, object, annex, &buf[buf_pos], |
| 1593 | buf_pos, buf_alloc - buf_pos - padding); |
| 1594 | if (n < 0) |
| 1595 | { |
| 1596 | /* An error occurred. */ |
| 1597 | xfree (buf); |
| 1598 | return -1; |
| 1599 | } |
| 1600 | else if (n == 0) |
| 1601 | { |
| 1602 | /* Read all there was. */ |
| 1603 | if (buf_pos == 0) |
| 1604 | xfree (buf); |
| 1605 | else |
| 1606 | *buf_p = buf; |
| 1607 | return buf_pos; |
| 1608 | } |
| 1609 | |
| 1610 | buf_pos += n; |
| 1611 | |
| 1612 | /* If the buffer is filling up, expand it. */ |
| 1613 | if (buf_alloc < buf_pos * 2) |
| 1614 | { |
| 1615 | buf_alloc *= 2; |
| 1616 | buf = xrealloc (buf, buf_alloc); |
| 1617 | } |
| 1618 | |
| 1619 | QUIT; |
| 1620 | } |
| 1621 | } |
| 1622 | |
| 1623 | /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
| 1624 | the size of the transferred data. See the declaration in "target.h" |
| 1625 | function for more information about the return value. */ |
| 1626 | |
| 1627 | LONGEST |
| 1628 | target_read_alloc (struct target_ops *ops, enum target_object object, |
| 1629 | const char *annex, gdb_byte **buf_p) |
| 1630 | { |
| 1631 | return target_read_alloc_1 (ops, object, annex, buf_p, 0); |
| 1632 | } |
| 1633 | |
| 1634 | /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and |
| 1635 | returned as a string, allocated using xmalloc. If an error occurs |
| 1636 | or the transfer is unsupported, NULL is returned. Empty objects |
| 1637 | are returned as allocated but empty strings. A warning is issued |
| 1638 | if the result contains any embedded NUL bytes. */ |
| 1639 | |
| 1640 | char * |
| 1641 | target_read_stralloc (struct target_ops *ops, enum target_object object, |
| 1642 | const char *annex) |
| 1643 | { |
| 1644 | gdb_byte *buffer; |
| 1645 | LONGEST transferred; |
| 1646 | |
| 1647 | transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1); |
| 1648 | |
| 1649 | if (transferred < 0) |
| 1650 | return NULL; |
| 1651 | |
| 1652 | if (transferred == 0) |
| 1653 | return xstrdup (""); |
| 1654 | |
| 1655 | buffer[transferred] = 0; |
| 1656 | if (strlen (buffer) < transferred) |
| 1657 | warning (_("target object %d, annex %s, " |
| 1658 | "contained unexpected null characters"), |
| 1659 | (int) object, annex ? annex : "(none)"); |
| 1660 | |
| 1661 | return (char *) buffer; |
| 1662 | } |
| 1663 | |
| 1664 | /* Memory transfer methods. */ |
| 1665 | |
| 1666 | void |
| 1667 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
| 1668 | LONGEST len) |
| 1669 | { |
| 1670 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, buf, addr, len) |
| 1671 | != len) |
| 1672 | memory_error (EIO, addr); |
| 1673 | } |
| 1674 | |
| 1675 | ULONGEST |
| 1676 | get_target_memory_unsigned (struct target_ops *ops, |
| 1677 | CORE_ADDR addr, int len) |
| 1678 | { |
| 1679 | gdb_byte buf[sizeof (ULONGEST)]; |
| 1680 | |
| 1681 | gdb_assert (len <= sizeof (buf)); |
| 1682 | get_target_memory (ops, addr, buf, len); |
| 1683 | return extract_unsigned_integer (buf, len); |
| 1684 | } |
| 1685 | |
| 1686 | static void |
| 1687 | target_info (char *args, int from_tty) |
| 1688 | { |
| 1689 | struct target_ops *t; |
| 1690 | int has_all_mem = 0; |
| 1691 | |
| 1692 | if (symfile_objfile != NULL) |
| 1693 | printf_unfiltered (_("Symbols from \"%s\".\n"), symfile_objfile->name); |
| 1694 | |
| 1695 | for (t = target_stack; t != NULL; t = t->beneath) |
| 1696 | { |
| 1697 | if (!t->to_has_memory) |
| 1698 | continue; |
| 1699 | |
| 1700 | if ((int) (t->to_stratum) <= (int) dummy_stratum) |
| 1701 | continue; |
| 1702 | if (has_all_mem) |
| 1703 | printf_unfiltered (_("\tWhile running this, GDB does not access memory from...\n")); |
| 1704 | printf_unfiltered ("%s:\n", t->to_longname); |
| 1705 | (t->to_files_info) (t); |
| 1706 | has_all_mem = t->to_has_all_memory; |
| 1707 | } |
| 1708 | } |
| 1709 | |
| 1710 | /* This function is called before any new inferior is created, e.g. |
| 1711 | by running a program, attaching, or connecting to a target. |
| 1712 | It cleans up any state from previous invocations which might |
| 1713 | change between runs. This is a subset of what target_preopen |
| 1714 | resets (things which might change between targets). */ |
| 1715 | |
| 1716 | void |
| 1717 | target_pre_inferior (int from_tty) |
| 1718 | { |
| 1719 | /* Clear out solib state. Otherwise the solib state of the previous |
| 1720 | inferior might have survived and is entirely wrong for the new |
| 1721 | target. This has been observed on GNU/Linux using glibc 2.3. How |
| 1722 | to reproduce: |
| 1723 | |
| 1724 | bash$ ./foo& |
| 1725 | [1] 4711 |
| 1726 | bash$ ./foo& |
| 1727 | [1] 4712 |
| 1728 | bash$ gdb ./foo |
| 1729 | [...] |
| 1730 | (gdb) attach 4711 |
| 1731 | (gdb) detach |
| 1732 | (gdb) attach 4712 |
| 1733 | Cannot access memory at address 0xdeadbeef |
| 1734 | */ |
| 1735 | no_shared_libraries (NULL, from_tty); |
| 1736 | |
| 1737 | invalidate_target_mem_regions (); |
| 1738 | |
| 1739 | target_clear_description (); |
| 1740 | } |
| 1741 | |
| 1742 | /* This is to be called by the open routine before it does |
| 1743 | anything. */ |
| 1744 | |
| 1745 | void |
| 1746 | target_preopen (int from_tty) |
| 1747 | { |
| 1748 | dont_repeat (); |
| 1749 | |
| 1750 | if (target_has_execution) |
| 1751 | { |
| 1752 | if (!from_tty |
| 1753 | || query (_("A program is being debugged already. Kill it? "))) |
| 1754 | target_kill (); |
| 1755 | else |
| 1756 | error (_("Program not killed.")); |
| 1757 | } |
| 1758 | |
| 1759 | /* Calling target_kill may remove the target from the stack. But if |
| 1760 | it doesn't (which seems like a win for UDI), remove it now. */ |
| 1761 | /* Leave the exec target, though. The user may be switching from a |
| 1762 | live process to a core of the same program. */ |
| 1763 | pop_all_targets_above (file_stratum, 0); |
| 1764 | |
| 1765 | target_pre_inferior (from_tty); |
| 1766 | } |
| 1767 | |
| 1768 | /* Detach a target after doing deferred register stores. */ |
| 1769 | |
| 1770 | void |
| 1771 | target_detach (char *args, int from_tty) |
| 1772 | { |
| 1773 | /* If we're in breakpoints-always-inserted mode, have to |
| 1774 | remove them before detaching. */ |
| 1775 | remove_breakpoints (); |
| 1776 | |
| 1777 | (current_target.to_detach) (args, from_tty); |
| 1778 | } |
| 1779 | |
| 1780 | void |
| 1781 | target_disconnect (char *args, int from_tty) |
| 1782 | { |
| 1783 | struct target_ops *t; |
| 1784 | |
| 1785 | /* If we're in breakpoints-always-inserted mode, have to |
| 1786 | remove them before disconnecting. */ |
| 1787 | remove_breakpoints (); |
| 1788 | |
| 1789 | for (t = current_target.beneath; t != NULL; t = t->beneath) |
| 1790 | if (t->to_disconnect != NULL) |
| 1791 | { |
| 1792 | if (targetdebug) |
| 1793 | fprintf_unfiltered (gdb_stdlog, "target_disconnect (%s, %d)\n", |
| 1794 | args, from_tty); |
| 1795 | t->to_disconnect (t, args, from_tty); |
| 1796 | return; |
| 1797 | } |
| 1798 | |
| 1799 | tcomplain (); |
| 1800 | } |
| 1801 | |
| 1802 | void |
| 1803 | target_resume (ptid_t ptid, int step, enum target_signal signal) |
| 1804 | { |
| 1805 | dcache_invalidate (target_dcache); |
| 1806 | (*current_target.to_resume) (ptid, step, signal); |
| 1807 | set_executing (ptid, 1); |
| 1808 | set_running (ptid, 1); |
| 1809 | } |
| 1810 | /* Look through the list of possible targets for a target that can |
| 1811 | follow forks. */ |
| 1812 | |
| 1813 | int |
| 1814 | target_follow_fork (int follow_child) |
| 1815 | { |
| 1816 | struct target_ops *t; |
| 1817 | |
| 1818 | for (t = current_target.beneath; t != NULL; t = t->beneath) |
| 1819 | { |
| 1820 | if (t->to_follow_fork != NULL) |
| 1821 | { |
| 1822 | int retval = t->to_follow_fork (t, follow_child); |
| 1823 | if (targetdebug) |
| 1824 | fprintf_unfiltered (gdb_stdlog, "target_follow_fork (%d) = %d\n", |
| 1825 | follow_child, retval); |
| 1826 | return retval; |
| 1827 | } |
| 1828 | } |
| 1829 | |
| 1830 | /* Some target returned a fork event, but did not know how to follow it. */ |
| 1831 | internal_error (__FILE__, __LINE__, |
| 1832 | "could not find a target to follow fork"); |
| 1833 | } |
| 1834 | |
| 1835 | /* Look for a target which can describe architectural features, starting |
| 1836 | from TARGET. If we find one, return its description. */ |
| 1837 | |
| 1838 | const struct target_desc * |
| 1839 | target_read_description (struct target_ops *target) |
| 1840 | { |
| 1841 | struct target_ops *t; |
| 1842 | |
| 1843 | for (t = target; t != NULL; t = t->beneath) |
| 1844 | if (t->to_read_description != NULL) |
| 1845 | { |
| 1846 | const struct target_desc *tdesc; |
| 1847 | |
| 1848 | tdesc = t->to_read_description (t); |
| 1849 | if (tdesc) |
| 1850 | return tdesc; |
| 1851 | } |
| 1852 | |
| 1853 | return NULL; |
| 1854 | } |
| 1855 | |
| 1856 | /* The default implementation of to_search_memory. |
| 1857 | This implements a basic search of memory, reading target memory and |
| 1858 | performing the search here (as opposed to performing the search in on the |
| 1859 | target side with, for example, gdbserver). */ |
| 1860 | |
| 1861 | int |
| 1862 | simple_search_memory (struct target_ops *ops, |
| 1863 | CORE_ADDR start_addr, ULONGEST search_space_len, |
| 1864 | const gdb_byte *pattern, ULONGEST pattern_len, |
| 1865 | CORE_ADDR *found_addrp) |
| 1866 | { |
| 1867 | /* NOTE: also defined in find.c testcase. */ |
| 1868 | #define SEARCH_CHUNK_SIZE 16000 |
| 1869 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; |
| 1870 | /* Buffer to hold memory contents for searching. */ |
| 1871 | gdb_byte *search_buf; |
| 1872 | unsigned search_buf_size; |
| 1873 | struct cleanup *old_cleanups; |
| 1874 | |
| 1875 | search_buf_size = chunk_size + pattern_len - 1; |
| 1876 | |
| 1877 | /* No point in trying to allocate a buffer larger than the search space. */ |
| 1878 | if (search_space_len < search_buf_size) |
| 1879 | search_buf_size = search_space_len; |
| 1880 | |
| 1881 | search_buf = malloc (search_buf_size); |
| 1882 | if (search_buf == NULL) |
| 1883 | error (_("Unable to allocate memory to perform the search.")); |
| 1884 | old_cleanups = make_cleanup (free_current_contents, &search_buf); |
| 1885 | |
| 1886 | /* Prime the search buffer. */ |
| 1887 | |
| 1888 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, |
| 1889 | search_buf, start_addr, search_buf_size) != search_buf_size) |
| 1890 | { |
| 1891 | warning (_("Unable to access target memory at %s, halting search."), |
| 1892 | hex_string (start_addr)); |
| 1893 | do_cleanups (old_cleanups); |
| 1894 | return -1; |
| 1895 | } |
| 1896 | |
| 1897 | /* Perform the search. |
| 1898 | |
| 1899 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. |
| 1900 | When we've scanned N bytes we copy the trailing bytes to the start and |
| 1901 | read in another N bytes. */ |
| 1902 | |
| 1903 | while (search_space_len >= pattern_len) |
| 1904 | { |
| 1905 | gdb_byte *found_ptr; |
| 1906 | unsigned nr_search_bytes = min (search_space_len, search_buf_size); |
| 1907 | |
| 1908 | found_ptr = memmem (search_buf, nr_search_bytes, |
| 1909 | pattern, pattern_len); |
| 1910 | |
| 1911 | if (found_ptr != NULL) |
| 1912 | { |
| 1913 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf); |
| 1914 | *found_addrp = found_addr; |
| 1915 | do_cleanups (old_cleanups); |
| 1916 | return 1; |
| 1917 | } |
| 1918 | |
| 1919 | /* Not found in this chunk, skip to next chunk. */ |
| 1920 | |
| 1921 | /* Don't let search_space_len wrap here, it's unsigned. */ |
| 1922 | if (search_space_len >= chunk_size) |
| 1923 | search_space_len -= chunk_size; |
| 1924 | else |
| 1925 | search_space_len = 0; |
| 1926 | |
| 1927 | if (search_space_len >= pattern_len) |
| 1928 | { |
| 1929 | unsigned keep_len = search_buf_size - chunk_size; |
| 1930 | CORE_ADDR read_addr = start_addr + keep_len; |
| 1931 | int nr_to_read; |
| 1932 | |
| 1933 | /* Copy the trailing part of the previous iteration to the front |
| 1934 | of the buffer for the next iteration. */ |
| 1935 | gdb_assert (keep_len == pattern_len - 1); |
| 1936 | memcpy (search_buf, search_buf + chunk_size, keep_len); |
| 1937 | |
| 1938 | nr_to_read = min (search_space_len - keep_len, chunk_size); |
| 1939 | |
| 1940 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, |
| 1941 | search_buf + keep_len, read_addr, |
| 1942 | nr_to_read) != nr_to_read) |
| 1943 | { |
| 1944 | warning (_("Unable to access target memory at %s, halting search."), |
| 1945 | hex_string (read_addr)); |
| 1946 | do_cleanups (old_cleanups); |
| 1947 | return -1; |
| 1948 | } |
| 1949 | |
| 1950 | start_addr += chunk_size; |
| 1951 | } |
| 1952 | } |
| 1953 | |
| 1954 | /* Not found. */ |
| 1955 | |
| 1956 | do_cleanups (old_cleanups); |
| 1957 | return 0; |
| 1958 | } |
| 1959 | |
| 1960 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
| 1961 | sequence of bytes in PATTERN with length PATTERN_LEN. |
| 1962 | |
| 1963 | The result is 1 if found, 0 if not found, and -1 if there was an error |
| 1964 | requiring halting of the search (e.g. memory read error). |
| 1965 | If the pattern is found the address is recorded in FOUND_ADDRP. */ |
| 1966 | |
| 1967 | int |
| 1968 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, |
| 1969 | const gdb_byte *pattern, ULONGEST pattern_len, |
| 1970 | CORE_ADDR *found_addrp) |
| 1971 | { |
| 1972 | struct target_ops *t; |
| 1973 | int found; |
| 1974 | |
| 1975 | /* We don't use INHERIT to set current_target.to_search_memory, |
| 1976 | so we have to scan the target stack and handle targetdebug |
| 1977 | ourselves. */ |
| 1978 | |
| 1979 | if (targetdebug) |
| 1980 | fprintf_unfiltered (gdb_stdlog, "target_search_memory (%s, ...)\n", |
| 1981 | hex_string (start_addr)); |
| 1982 | |
| 1983 | for (t = current_target.beneath; t != NULL; t = t->beneath) |
| 1984 | if (t->to_search_memory != NULL) |
| 1985 | break; |
| 1986 | |
| 1987 | if (t != NULL) |
| 1988 | { |
| 1989 | found = t->to_search_memory (t, start_addr, search_space_len, |
| 1990 | pattern, pattern_len, found_addrp); |
| 1991 | } |
| 1992 | else |
| 1993 | { |
| 1994 | /* If a special version of to_search_memory isn't available, use the |
| 1995 | simple version. */ |
| 1996 | found = simple_search_memory (¤t_target, |
| 1997 | start_addr, search_space_len, |
| 1998 | pattern, pattern_len, found_addrp); |
| 1999 | } |
| 2000 | |
| 2001 | if (targetdebug) |
| 2002 | fprintf_unfiltered (gdb_stdlog, " = %d\n", found); |
| 2003 | |
| 2004 | return found; |
| 2005 | } |
| 2006 | |
| 2007 | /* Look through the currently pushed targets. If none of them will |
| 2008 | be able to restart the currently running process, issue an error |
| 2009 | message. */ |
| 2010 | |
| 2011 | void |
| 2012 | target_require_runnable (void) |
| 2013 | { |
| 2014 | struct target_ops *t; |
| 2015 | |
| 2016 | for (t = target_stack; t != NULL; t = t->beneath) |
| 2017 | { |
| 2018 | /* If this target knows how to create a new program, then |
| 2019 | assume we will still be able to after killing the current |
| 2020 | one. Either killing and mourning will not pop T, or else |
| 2021 | find_default_run_target will find it again. */ |
| 2022 | if (t->to_create_inferior != NULL) |
| 2023 | return; |
| 2024 | |
| 2025 | /* Do not worry about thread_stratum targets that can not |
| 2026 | create inferiors. Assume they will be pushed again if |
| 2027 | necessary, and continue to the process_stratum. */ |
| 2028 | if (t->to_stratum == thread_stratum) |
| 2029 | continue; |
| 2030 | |
| 2031 | error (_("\ |
| 2032 | The \"%s\" target does not support \"run\". Try \"help target\" or \"continue\"."), |
| 2033 | t->to_shortname); |
| 2034 | } |
| 2035 | |
| 2036 | /* This function is only called if the target is running. In that |
| 2037 | case there should have been a process_stratum target and it |
| 2038 | should either know how to create inferiors, or not... */ |
| 2039 | internal_error (__FILE__, __LINE__, "No targets found"); |
| 2040 | } |
| 2041 | |
| 2042 | /* Look through the list of possible targets for a target that can |
| 2043 | execute a run or attach command without any other data. This is |
| 2044 | used to locate the default process stratum. |
| 2045 | |
| 2046 | If DO_MESG is not NULL, the result is always valid (error() is |
| 2047 | called for errors); else, return NULL on error. */ |
| 2048 | |
| 2049 | static struct target_ops * |
| 2050 | find_default_run_target (char *do_mesg) |
| 2051 | { |
| 2052 | struct target_ops **t; |
| 2053 | struct target_ops *runable = NULL; |
| 2054 | int count; |
| 2055 | |
| 2056 | count = 0; |
| 2057 | |
| 2058 | for (t = target_structs; t < target_structs + target_struct_size; |
| 2059 | ++t) |
| 2060 | { |
| 2061 | if ((*t)->to_can_run && target_can_run (*t)) |
| 2062 | { |
| 2063 | runable = *t; |
| 2064 | ++count; |
| 2065 | } |
| 2066 | } |
| 2067 | |
| 2068 | if (count != 1) |
| 2069 | { |
| 2070 | if (do_mesg) |
| 2071 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); |
| 2072 | else |
| 2073 | return NULL; |
| 2074 | } |
| 2075 | |
| 2076 | return runable; |
| 2077 | } |
| 2078 | |
| 2079 | void |
| 2080 | find_default_attach (char *args, int from_tty) |
| 2081 | { |
| 2082 | struct target_ops *t; |
| 2083 | |
| 2084 | t = find_default_run_target ("attach"); |
| 2085 | (t->to_attach) (args, from_tty); |
| 2086 | return; |
| 2087 | } |
| 2088 | |
| 2089 | void |
| 2090 | find_default_create_inferior (char *exec_file, char *allargs, char **env, |
| 2091 | int from_tty) |
| 2092 | { |
| 2093 | struct target_ops *t; |
| 2094 | |
| 2095 | t = find_default_run_target ("run"); |
| 2096 | (t->to_create_inferior) (exec_file, allargs, env, from_tty); |
| 2097 | return; |
| 2098 | } |
| 2099 | |
| 2100 | int |
| 2101 | find_default_can_async_p (void) |
| 2102 | { |
| 2103 | struct target_ops *t; |
| 2104 | |
| 2105 | /* This may be called before the target is pushed on the stack; |
| 2106 | look for the default process stratum. If there's none, gdb isn't |
| 2107 | configured with a native debugger, and target remote isn't |
| 2108 | connected yet. */ |
| 2109 | t = find_default_run_target (NULL); |
| 2110 | if (t && t->to_can_async_p) |
| 2111 | return (t->to_can_async_p) (); |
| 2112 | return 0; |
| 2113 | } |
| 2114 | |
| 2115 | int |
| 2116 | find_default_is_async_p (void) |
| 2117 | { |
| 2118 | struct target_ops *t; |
| 2119 | |
| 2120 | /* This may be called before the target is pushed on the stack; |
| 2121 | look for the default process stratum. If there's none, gdb isn't |
| 2122 | configured with a native debugger, and target remote isn't |
| 2123 | connected yet. */ |
| 2124 | t = find_default_run_target (NULL); |
| 2125 | if (t && t->to_is_async_p) |
| 2126 | return (t->to_is_async_p) (); |
| 2127 | return 0; |
| 2128 | } |
| 2129 | |
| 2130 | int |
| 2131 | find_default_supports_non_stop (void) |
| 2132 | { |
| 2133 | struct target_ops *t; |
| 2134 | |
| 2135 | t = find_default_run_target (NULL); |
| 2136 | if (t && t->to_supports_non_stop) |
| 2137 | return (t->to_supports_non_stop) (); |
| 2138 | return 0; |
| 2139 | } |
| 2140 | |
| 2141 | int |
| 2142 | target_supports_non_stop () |
| 2143 | { |
| 2144 | struct target_ops *t; |
| 2145 | for (t = ¤t_target; t != NULL; t = t->beneath) |
| 2146 | if (t->to_supports_non_stop) |
| 2147 | return t->to_supports_non_stop (); |
| 2148 | |
| 2149 | return 0; |
| 2150 | } |
| 2151 | |
| 2152 | |
| 2153 | static int |
| 2154 | default_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) |
| 2155 | { |
| 2156 | return (len <= gdbarch_ptr_bit (target_gdbarch) / TARGET_CHAR_BIT); |
| 2157 | } |
| 2158 | |
| 2159 | static int |
| 2160 | default_watchpoint_addr_within_range (struct target_ops *target, |
| 2161 | CORE_ADDR addr, |
| 2162 | CORE_ADDR start, int length) |
| 2163 | { |
| 2164 | return addr >= start && addr < start + length; |
| 2165 | } |
| 2166 | |
| 2167 | static int |
| 2168 | return_zero (void) |
| 2169 | { |
| 2170 | return 0; |
| 2171 | } |
| 2172 | |
| 2173 | static int |
| 2174 | return_one (void) |
| 2175 | { |
| 2176 | return 1; |
| 2177 | } |
| 2178 | |
| 2179 | static int |
| 2180 | return_minus_one (void) |
| 2181 | { |
| 2182 | return -1; |
| 2183 | } |
| 2184 | |
| 2185 | /* |
| 2186 | * Resize the to_sections pointer. Also make sure that anyone that |
| 2187 | * was holding on to an old value of it gets updated. |
| 2188 | * Returns the old size. |
| 2189 | */ |
| 2190 | |
| 2191 | int |
| 2192 | target_resize_to_sections (struct target_ops *target, int num_added) |
| 2193 | { |
| 2194 | struct target_ops **t; |
| 2195 | struct section_table *old_value; |
| 2196 | int old_count; |
| 2197 | |
| 2198 | old_value = target->to_sections; |
| 2199 | |
| 2200 | if (target->to_sections) |
| 2201 | { |
| 2202 | old_count = target->to_sections_end - target->to_sections; |
| 2203 | target->to_sections = (struct section_table *) |
| 2204 | xrealloc ((char *) target->to_sections, |
| 2205 | (sizeof (struct section_table)) * (num_added + old_count)); |
| 2206 | } |
| 2207 | else |
| 2208 | { |
| 2209 | old_count = 0; |
| 2210 | target->to_sections = (struct section_table *) |
| 2211 | xmalloc ((sizeof (struct section_table)) * num_added); |
| 2212 | } |
| 2213 | target->to_sections_end = target->to_sections + (num_added + old_count); |
| 2214 | |
| 2215 | /* Check to see if anyone else was pointing to this structure. |
| 2216 | If old_value was null, then no one was. */ |
| 2217 | |
| 2218 | if (old_value) |
| 2219 | { |
| 2220 | for (t = target_structs; t < target_structs + target_struct_size; |
| 2221 | ++t) |
| 2222 | { |
| 2223 | if ((*t)->to_sections == old_value) |
| 2224 | { |
| 2225 | (*t)->to_sections = target->to_sections; |
| 2226 | (*t)->to_sections_end = target->to_sections_end; |
| 2227 | } |
| 2228 | } |
| 2229 | /* There is a flattened view of the target stack in current_target, |
| 2230 | so its to_sections pointer might also need updating. */ |
| 2231 | if (current_target.to_sections == old_value) |
| 2232 | { |
| 2233 | current_target.to_sections = target->to_sections; |
| 2234 | current_target.to_sections_end = target->to_sections_end; |
| 2235 | } |
| 2236 | } |
| 2237 | |
| 2238 | return old_count; |
| 2239 | |
| 2240 | } |
| 2241 | |
| 2242 | /* Remove all target sections taken from ABFD. |
| 2243 | |
| 2244 | Scan the current target stack for targets whose section tables |
| 2245 | refer to sections from BFD, and remove those sections. We use this |
| 2246 | when we notice that the inferior has unloaded a shared object, for |
| 2247 | example. */ |
| 2248 | void |
| 2249 | remove_target_sections (bfd *abfd) |
| 2250 | { |
| 2251 | struct target_ops **t; |
| 2252 | |
| 2253 | for (t = target_structs; t < target_structs + target_struct_size; t++) |
| 2254 | { |
| 2255 | struct section_table *src, *dest; |
| 2256 | |
| 2257 | dest = (*t)->to_sections; |
| 2258 | for (src = (*t)->to_sections; src < (*t)->to_sections_end; src++) |
| 2259 | if (src->bfd != abfd) |
| 2260 | { |
| 2261 | /* Keep this section. */ |
| 2262 | if (dest < src) *dest = *src; |
| 2263 | dest++; |
| 2264 | } |
| 2265 | |
| 2266 | /* If we've dropped any sections, resize the section table. */ |
| 2267 | if (dest < src) |
| 2268 | target_resize_to_sections (*t, dest - src); |
| 2269 | } |
| 2270 | } |
| 2271 | |
| 2272 | |
| 2273 | |
| 2274 | |
| 2275 | /* Find a single runnable target in the stack and return it. If for |
| 2276 | some reason there is more than one, return NULL. */ |
| 2277 | |
| 2278 | struct target_ops * |
| 2279 | find_run_target (void) |
| 2280 | { |
| 2281 | struct target_ops **t; |
| 2282 | struct target_ops *runable = NULL; |
| 2283 | int count; |
| 2284 | |
| 2285 | count = 0; |
| 2286 | |
| 2287 | for (t = target_structs; t < target_structs + target_struct_size; ++t) |
| 2288 | { |
| 2289 | if ((*t)->to_can_run && target_can_run (*t)) |
| 2290 | { |
| 2291 | runable = *t; |
| 2292 | ++count; |
| 2293 | } |
| 2294 | } |
| 2295 | |
| 2296 | return (count == 1 ? runable : NULL); |
| 2297 | } |
| 2298 | |
| 2299 | /* Find a single core_stratum target in the list of targets and return it. |
| 2300 | If for some reason there is more than one, return NULL. */ |
| 2301 | |
| 2302 | struct target_ops * |
| 2303 | find_core_target (void) |
| 2304 | { |
| 2305 | struct target_ops **t; |
| 2306 | struct target_ops *runable = NULL; |
| 2307 | int count; |
| 2308 | |
| 2309 | count = 0; |
| 2310 | |
| 2311 | for (t = target_structs; t < target_structs + target_struct_size; |
| 2312 | ++t) |
| 2313 | { |
| 2314 | if ((*t)->to_stratum == core_stratum) |
| 2315 | { |
| 2316 | runable = *t; |
| 2317 | ++count; |
| 2318 | } |
| 2319 | } |
| 2320 | |
| 2321 | return (count == 1 ? runable : NULL); |
| 2322 | } |
| 2323 | |
| 2324 | /* |
| 2325 | * Find the next target down the stack from the specified target. |
| 2326 | */ |
| 2327 | |
| 2328 | struct target_ops * |
| 2329 | find_target_beneath (struct target_ops *t) |
| 2330 | { |
| 2331 | return t->beneath; |
| 2332 | } |
| 2333 | |
| 2334 | \f |
| 2335 | /* The inferior process has died. Long live the inferior! */ |
| 2336 | |
| 2337 | void |
| 2338 | generic_mourn_inferior (void) |
| 2339 | { |
| 2340 | extern int show_breakpoint_hit_counts; |
| 2341 | |
| 2342 | inferior_ptid = null_ptid; |
| 2343 | attach_flag = 0; |
| 2344 | breakpoint_init_inferior (inf_exited); |
| 2345 | registers_changed (); |
| 2346 | |
| 2347 | reopen_exec_file (); |
| 2348 | reinit_frame_cache (); |
| 2349 | |
| 2350 | /* It is confusing to the user for ignore counts to stick around |
| 2351 | from previous runs of the inferior. So clear them. */ |
| 2352 | /* However, it is more confusing for the ignore counts to disappear when |
| 2353 | using hit counts. So don't clear them if we're counting hits. */ |
| 2354 | if (!show_breakpoint_hit_counts) |
| 2355 | breakpoint_clear_ignore_counts (); |
| 2356 | |
| 2357 | if (deprecated_detach_hook) |
| 2358 | deprecated_detach_hook (); |
| 2359 | } |
| 2360 | \f |
| 2361 | /* Helper function for child_wait and the derivatives of child_wait. |
| 2362 | HOSTSTATUS is the waitstatus from wait() or the equivalent; store our |
| 2363 | translation of that in OURSTATUS. */ |
| 2364 | void |
| 2365 | store_waitstatus (struct target_waitstatus *ourstatus, int hoststatus) |
| 2366 | { |
| 2367 | if (WIFEXITED (hoststatus)) |
| 2368 | { |
| 2369 | ourstatus->kind = TARGET_WAITKIND_EXITED; |
| 2370 | ourstatus->value.integer = WEXITSTATUS (hoststatus); |
| 2371 | } |
| 2372 | else if (!WIFSTOPPED (hoststatus)) |
| 2373 | { |
| 2374 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; |
| 2375 | ourstatus->value.sig = target_signal_from_host (WTERMSIG (hoststatus)); |
| 2376 | } |
| 2377 | else |
| 2378 | { |
| 2379 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 2380 | ourstatus->value.sig = target_signal_from_host (WSTOPSIG (hoststatus)); |
| 2381 | } |
| 2382 | } |
| 2383 | \f |
| 2384 | /* Returns zero to leave the inferior alone, one to interrupt it. */ |
| 2385 | int (*target_activity_function) (void); |
| 2386 | int target_activity_fd; |
| 2387 | \f |
| 2388 | /* Convert a normal process ID to a string. Returns the string in a |
| 2389 | static buffer. */ |
| 2390 | |
| 2391 | char * |
| 2392 | normal_pid_to_str (ptid_t ptid) |
| 2393 | { |
| 2394 | static char buf[32]; |
| 2395 | |
| 2396 | xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid)); |
| 2397 | return buf; |
| 2398 | } |
| 2399 | |
| 2400 | /* Error-catcher for target_find_memory_regions */ |
| 2401 | static int dummy_find_memory_regions (int (*ignore1) (), void *ignore2) |
| 2402 | { |
| 2403 | error (_("No target.")); |
| 2404 | return 0; |
| 2405 | } |
| 2406 | |
| 2407 | /* Error-catcher for target_make_corefile_notes */ |
| 2408 | static char * dummy_make_corefile_notes (bfd *ignore1, int *ignore2) |
| 2409 | { |
| 2410 | error (_("No target.")); |
| 2411 | return NULL; |
| 2412 | } |
| 2413 | |
| 2414 | /* Set up the handful of non-empty slots needed by the dummy target |
| 2415 | vector. */ |
| 2416 | |
| 2417 | static void |
| 2418 | init_dummy_target (void) |
| 2419 | { |
| 2420 | dummy_target.to_shortname = "None"; |
| 2421 | dummy_target.to_longname = "None"; |
| 2422 | dummy_target.to_doc = ""; |
| 2423 | dummy_target.to_attach = find_default_attach; |
| 2424 | dummy_target.to_create_inferior = find_default_create_inferior; |
| 2425 | dummy_target.to_can_async_p = find_default_can_async_p; |
| 2426 | dummy_target.to_is_async_p = find_default_is_async_p; |
| 2427 | dummy_target.to_supports_non_stop = find_default_supports_non_stop; |
| 2428 | dummy_target.to_pid_to_str = normal_pid_to_str; |
| 2429 | dummy_target.to_stratum = dummy_stratum; |
| 2430 | dummy_target.to_find_memory_regions = dummy_find_memory_regions; |
| 2431 | dummy_target.to_make_corefile_notes = dummy_make_corefile_notes; |
| 2432 | dummy_target.to_xfer_partial = default_xfer_partial; |
| 2433 | dummy_target.to_magic = OPS_MAGIC; |
| 2434 | } |
| 2435 | \f |
| 2436 | static void |
| 2437 | debug_to_open (char *args, int from_tty) |
| 2438 | { |
| 2439 | debug_target.to_open (args, from_tty); |
| 2440 | |
| 2441 | fprintf_unfiltered (gdb_stdlog, "target_open (%s, %d)\n", args, from_tty); |
| 2442 | } |
| 2443 | |
| 2444 | static void |
| 2445 | debug_to_close (int quitting) |
| 2446 | { |
| 2447 | target_close (&debug_target, quitting); |
| 2448 | fprintf_unfiltered (gdb_stdlog, "target_close (%d)\n", quitting); |
| 2449 | } |
| 2450 | |
| 2451 | void |
| 2452 | target_close (struct target_ops *targ, int quitting) |
| 2453 | { |
| 2454 | if (targ->to_xclose != NULL) |
| 2455 | targ->to_xclose (targ, quitting); |
| 2456 | else if (targ->to_close != NULL) |
| 2457 | targ->to_close (quitting); |
| 2458 | } |
| 2459 | |
| 2460 | static void |
| 2461 | debug_to_attach (char *args, int from_tty) |
| 2462 | { |
| 2463 | debug_target.to_attach (args, from_tty); |
| 2464 | |
| 2465 | fprintf_unfiltered (gdb_stdlog, "target_attach (%s, %d)\n", args, from_tty); |
| 2466 | } |
| 2467 | |
| 2468 | |
| 2469 | static void |
| 2470 | debug_to_post_attach (int pid) |
| 2471 | { |
| 2472 | debug_target.to_post_attach (pid); |
| 2473 | |
| 2474 | fprintf_unfiltered (gdb_stdlog, "target_post_attach (%d)\n", pid); |
| 2475 | } |
| 2476 | |
| 2477 | static void |
| 2478 | debug_to_detach (char *args, int from_tty) |
| 2479 | { |
| 2480 | debug_target.to_detach (args, from_tty); |
| 2481 | |
| 2482 | fprintf_unfiltered (gdb_stdlog, "target_detach (%s, %d)\n", args, from_tty); |
| 2483 | } |
| 2484 | |
| 2485 | static void |
| 2486 | debug_to_resume (ptid_t ptid, int step, enum target_signal siggnal) |
| 2487 | { |
| 2488 | debug_target.to_resume (ptid, step, siggnal); |
| 2489 | |
| 2490 | fprintf_unfiltered (gdb_stdlog, "target_resume (%d, %s, %s)\n", PIDGET (ptid), |
| 2491 | step ? "step" : "continue", |
| 2492 | target_signal_to_name (siggnal)); |
| 2493 | } |
| 2494 | |
| 2495 | static ptid_t |
| 2496 | debug_to_wait (ptid_t ptid, struct target_waitstatus *status) |
| 2497 | { |
| 2498 | ptid_t retval; |
| 2499 | |
| 2500 | retval = debug_target.to_wait (ptid, status); |
| 2501 | |
| 2502 | fprintf_unfiltered (gdb_stdlog, |
| 2503 | "target_wait (%d, status) = %d, ", PIDGET (ptid), |
| 2504 | PIDGET (retval)); |
| 2505 | fprintf_unfiltered (gdb_stdlog, "status->kind = "); |
| 2506 | switch (status->kind) |
| 2507 | { |
| 2508 | case TARGET_WAITKIND_EXITED: |
| 2509 | fprintf_unfiltered (gdb_stdlog, "exited, status = %d\n", |
| 2510 | status->value.integer); |
| 2511 | break; |
| 2512 | case TARGET_WAITKIND_STOPPED: |
| 2513 | fprintf_unfiltered (gdb_stdlog, "stopped, signal = %s\n", |
| 2514 | target_signal_to_name (status->value.sig)); |
| 2515 | break; |
| 2516 | case TARGET_WAITKIND_SIGNALLED: |
| 2517 | fprintf_unfiltered (gdb_stdlog, "signalled, signal = %s\n", |
| 2518 | target_signal_to_name (status->value.sig)); |
| 2519 | break; |
| 2520 | case TARGET_WAITKIND_LOADED: |
| 2521 | fprintf_unfiltered (gdb_stdlog, "loaded\n"); |
| 2522 | break; |
| 2523 | case TARGET_WAITKIND_FORKED: |
| 2524 | fprintf_unfiltered (gdb_stdlog, "forked\n"); |
| 2525 | break; |
| 2526 | case TARGET_WAITKIND_VFORKED: |
| 2527 | fprintf_unfiltered (gdb_stdlog, "vforked\n"); |
| 2528 | break; |
| 2529 | case TARGET_WAITKIND_EXECD: |
| 2530 | fprintf_unfiltered (gdb_stdlog, "execd\n"); |
| 2531 | break; |
| 2532 | case TARGET_WAITKIND_SPURIOUS: |
| 2533 | fprintf_unfiltered (gdb_stdlog, "spurious\n"); |
| 2534 | break; |
| 2535 | default: |
| 2536 | fprintf_unfiltered (gdb_stdlog, "unknown???\n"); |
| 2537 | break; |
| 2538 | } |
| 2539 | |
| 2540 | return retval; |
| 2541 | } |
| 2542 | |
| 2543 | static void |
| 2544 | debug_print_register (const char * func, |
| 2545 | struct regcache *regcache, int regno) |
| 2546 | { |
| 2547 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 2548 | fprintf_unfiltered (gdb_stdlog, "%s ", func); |
| 2549 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch) |
| 2550 | && gdbarch_register_name (gdbarch, regno) != NULL |
| 2551 | && gdbarch_register_name (gdbarch, regno)[0] != '\0') |
| 2552 | fprintf_unfiltered (gdb_stdlog, "(%s)", |
| 2553 | gdbarch_register_name (gdbarch, regno)); |
| 2554 | else |
| 2555 | fprintf_unfiltered (gdb_stdlog, "(%d)", regno); |
| 2556 | if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)) |
| 2557 | { |
| 2558 | int i, size = register_size (gdbarch, regno); |
| 2559 | unsigned char buf[MAX_REGISTER_SIZE]; |
| 2560 | regcache_raw_collect (regcache, regno, buf); |
| 2561 | fprintf_unfiltered (gdb_stdlog, " = "); |
| 2562 | for (i = 0; i < size; i++) |
| 2563 | { |
| 2564 | fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); |
| 2565 | } |
| 2566 | if (size <= sizeof (LONGEST)) |
| 2567 | { |
| 2568 | ULONGEST val = extract_unsigned_integer (buf, size); |
| 2569 | fprintf_unfiltered (gdb_stdlog, " %s %s", |
| 2570 | core_addr_to_string_nz (val), plongest (val)); |
| 2571 | } |
| 2572 | } |
| 2573 | fprintf_unfiltered (gdb_stdlog, "\n"); |
| 2574 | } |
| 2575 | |
| 2576 | static void |
| 2577 | debug_to_fetch_registers (struct regcache *regcache, int regno) |
| 2578 | { |
| 2579 | debug_target.to_fetch_registers (regcache, regno); |
| 2580 | debug_print_register ("target_fetch_registers", regcache, regno); |
| 2581 | } |
| 2582 | |
| 2583 | static void |
| 2584 | debug_to_store_registers (struct regcache *regcache, int regno) |
| 2585 | { |
| 2586 | debug_target.to_store_registers (regcache, regno); |
| 2587 | debug_print_register ("target_store_registers", regcache, regno); |
| 2588 | fprintf_unfiltered (gdb_stdlog, "\n"); |
| 2589 | } |
| 2590 | |
| 2591 | static void |
| 2592 | debug_to_prepare_to_store (struct regcache *regcache) |
| 2593 | { |
| 2594 | debug_target.to_prepare_to_store (regcache); |
| 2595 | |
| 2596 | fprintf_unfiltered (gdb_stdlog, "target_prepare_to_store ()\n"); |
| 2597 | } |
| 2598 | |
| 2599 | static int |
| 2600 | deprecated_debug_xfer_memory (CORE_ADDR memaddr, bfd_byte *myaddr, int len, |
| 2601 | int write, struct mem_attrib *attrib, |
| 2602 | struct target_ops *target) |
| 2603 | { |
| 2604 | int retval; |
| 2605 | |
| 2606 | retval = debug_target.deprecated_xfer_memory (memaddr, myaddr, len, write, |
| 2607 | attrib, target); |
| 2608 | |
| 2609 | fprintf_unfiltered (gdb_stdlog, |
| 2610 | "target_xfer_memory (0x%x, xxx, %d, %s, xxx) = %d", |
| 2611 | (unsigned int) memaddr, /* possable truncate long long */ |
| 2612 | len, write ? "write" : "read", retval); |
| 2613 | |
| 2614 | if (retval > 0) |
| 2615 | { |
| 2616 | int i; |
| 2617 | |
| 2618 | fputs_unfiltered (", bytes =", gdb_stdlog); |
| 2619 | for (i = 0; i < retval; i++) |
| 2620 | { |
| 2621 | if ((((long) &(myaddr[i])) & 0xf) == 0) |
| 2622 | { |
| 2623 | if (targetdebug < 2 && i > 0) |
| 2624 | { |
| 2625 | fprintf_unfiltered (gdb_stdlog, " ..."); |
| 2626 | break; |
| 2627 | } |
| 2628 | fprintf_unfiltered (gdb_stdlog, "\n"); |
| 2629 | } |
| 2630 | |
| 2631 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
| 2632 | } |
| 2633 | } |
| 2634 | |
| 2635 | fputc_unfiltered ('\n', gdb_stdlog); |
| 2636 | |
| 2637 | return retval; |
| 2638 | } |
| 2639 | |
| 2640 | static void |
| 2641 | debug_to_files_info (struct target_ops *target) |
| 2642 | { |
| 2643 | debug_target.to_files_info (target); |
| 2644 | |
| 2645 | fprintf_unfiltered (gdb_stdlog, "target_files_info (xxx)\n"); |
| 2646 | } |
| 2647 | |
| 2648 | static int |
| 2649 | debug_to_insert_breakpoint (struct bp_target_info *bp_tgt) |
| 2650 | { |
| 2651 | int retval; |
| 2652 | |
| 2653 | retval = debug_target.to_insert_breakpoint (bp_tgt); |
| 2654 | |
| 2655 | fprintf_unfiltered (gdb_stdlog, |
| 2656 | "target_insert_breakpoint (0x%lx, xxx) = %ld\n", |
| 2657 | (unsigned long) bp_tgt->placed_address, |
| 2658 | (unsigned long) retval); |
| 2659 | return retval; |
| 2660 | } |
| 2661 | |
| 2662 | static int |
| 2663 | debug_to_remove_breakpoint (struct bp_target_info *bp_tgt) |
| 2664 | { |
| 2665 | int retval; |
| 2666 | |
| 2667 | retval = debug_target.to_remove_breakpoint (bp_tgt); |
| 2668 | |
| 2669 | fprintf_unfiltered (gdb_stdlog, |
| 2670 | "target_remove_breakpoint (0x%lx, xxx) = %ld\n", |
| 2671 | (unsigned long) bp_tgt->placed_address, |
| 2672 | (unsigned long) retval); |
| 2673 | return retval; |
| 2674 | } |
| 2675 | |
| 2676 | static int |
| 2677 | debug_to_can_use_hw_breakpoint (int type, int cnt, int from_tty) |
| 2678 | { |
| 2679 | int retval; |
| 2680 | |
| 2681 | retval = debug_target.to_can_use_hw_breakpoint (type, cnt, from_tty); |
| 2682 | |
| 2683 | fprintf_unfiltered (gdb_stdlog, |
| 2684 | "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n", |
| 2685 | (unsigned long) type, |
| 2686 | (unsigned long) cnt, |
| 2687 | (unsigned long) from_tty, |
| 2688 | (unsigned long) retval); |
| 2689 | return retval; |
| 2690 | } |
| 2691 | |
| 2692 | static int |
| 2693 | debug_to_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) |
| 2694 | { |
| 2695 | CORE_ADDR retval; |
| 2696 | |
| 2697 | retval = debug_target.to_region_ok_for_hw_watchpoint (addr, len); |
| 2698 | |
| 2699 | fprintf_unfiltered (gdb_stdlog, |
| 2700 | "TARGET_REGION_OK_FOR_HW_WATCHPOINT (%ld, %ld) = 0x%lx\n", |
| 2701 | (unsigned long) addr, |
| 2702 | (unsigned long) len, |
| 2703 | (unsigned long) retval); |
| 2704 | return retval; |
| 2705 | } |
| 2706 | |
| 2707 | static int |
| 2708 | debug_to_stopped_by_watchpoint (void) |
| 2709 | { |
| 2710 | int retval; |
| 2711 | |
| 2712 | retval = debug_target.to_stopped_by_watchpoint (); |
| 2713 | |
| 2714 | fprintf_unfiltered (gdb_stdlog, |
| 2715 | "STOPPED_BY_WATCHPOINT () = %ld\n", |
| 2716 | (unsigned long) retval); |
| 2717 | return retval; |
| 2718 | } |
| 2719 | |
| 2720 | static int |
| 2721 | debug_to_stopped_data_address (struct target_ops *target, CORE_ADDR *addr) |
| 2722 | { |
| 2723 | int retval; |
| 2724 | |
| 2725 | retval = debug_target.to_stopped_data_address (target, addr); |
| 2726 | |
| 2727 | fprintf_unfiltered (gdb_stdlog, |
| 2728 | "target_stopped_data_address ([0x%lx]) = %ld\n", |
| 2729 | (unsigned long)*addr, |
| 2730 | (unsigned long)retval); |
| 2731 | return retval; |
| 2732 | } |
| 2733 | |
| 2734 | static int |
| 2735 | debug_to_watchpoint_addr_within_range (struct target_ops *target, |
| 2736 | CORE_ADDR addr, |
| 2737 | CORE_ADDR start, int length) |
| 2738 | { |
| 2739 | int retval; |
| 2740 | |
| 2741 | retval = debug_target.to_watchpoint_addr_within_range (target, addr, |
| 2742 | start, length); |
| 2743 | |
| 2744 | fprintf_filtered (gdb_stdlog, |
| 2745 | "target_watchpoint_addr_within_range (0x%lx, 0x%lx, %d) = %d\n", |
| 2746 | (unsigned long) addr, (unsigned long) start, length, |
| 2747 | retval); |
| 2748 | return retval; |
| 2749 | } |
| 2750 | |
| 2751 | static int |
| 2752 | debug_to_insert_hw_breakpoint (struct bp_target_info *bp_tgt) |
| 2753 | { |
| 2754 | int retval; |
| 2755 | |
| 2756 | retval = debug_target.to_insert_hw_breakpoint (bp_tgt); |
| 2757 | |
| 2758 | fprintf_unfiltered (gdb_stdlog, |
| 2759 | "target_insert_hw_breakpoint (0x%lx, xxx) = %ld\n", |
| 2760 | (unsigned long) bp_tgt->placed_address, |
| 2761 | (unsigned long) retval); |
| 2762 | return retval; |
| 2763 | } |
| 2764 | |
| 2765 | static int |
| 2766 | debug_to_remove_hw_breakpoint (struct bp_target_info *bp_tgt) |
| 2767 | { |
| 2768 | int retval; |
| 2769 | |
| 2770 | retval = debug_target.to_remove_hw_breakpoint (bp_tgt); |
| 2771 | |
| 2772 | fprintf_unfiltered (gdb_stdlog, |
| 2773 | "target_remove_hw_breakpoint (0x%lx, xxx) = %ld\n", |
| 2774 | (unsigned long) bp_tgt->placed_address, |
| 2775 | (unsigned long) retval); |
| 2776 | return retval; |
| 2777 | } |
| 2778 | |
| 2779 | static int |
| 2780 | debug_to_insert_watchpoint (CORE_ADDR addr, int len, int type) |
| 2781 | { |
| 2782 | int retval; |
| 2783 | |
| 2784 | retval = debug_target.to_insert_watchpoint (addr, len, type); |
| 2785 | |
| 2786 | fprintf_unfiltered (gdb_stdlog, |
| 2787 | "target_insert_watchpoint (0x%lx, %d, %d) = %ld\n", |
| 2788 | (unsigned long) addr, len, type, (unsigned long) retval); |
| 2789 | return retval; |
| 2790 | } |
| 2791 | |
| 2792 | static int |
| 2793 | debug_to_remove_watchpoint (CORE_ADDR addr, int len, int type) |
| 2794 | { |
| 2795 | int retval; |
| 2796 | |
| 2797 | retval = debug_target.to_remove_watchpoint (addr, len, type); |
| 2798 | |
| 2799 | fprintf_unfiltered (gdb_stdlog, |
| 2800 | "target_remove_watchpoint (0x%lx, %d, %d) = %ld\n", |
| 2801 | (unsigned long) addr, len, type, (unsigned long) retval); |
| 2802 | return retval; |
| 2803 | } |
| 2804 | |
| 2805 | static void |
| 2806 | debug_to_terminal_init (void) |
| 2807 | { |
| 2808 | debug_target.to_terminal_init (); |
| 2809 | |
| 2810 | fprintf_unfiltered (gdb_stdlog, "target_terminal_init ()\n"); |
| 2811 | } |
| 2812 | |
| 2813 | static void |
| 2814 | debug_to_terminal_inferior (void) |
| 2815 | { |
| 2816 | debug_target.to_terminal_inferior (); |
| 2817 | |
| 2818 | fprintf_unfiltered (gdb_stdlog, "target_terminal_inferior ()\n"); |
| 2819 | } |
| 2820 | |
| 2821 | static void |
| 2822 | debug_to_terminal_ours_for_output (void) |
| 2823 | { |
| 2824 | debug_target.to_terminal_ours_for_output (); |
| 2825 | |
| 2826 | fprintf_unfiltered (gdb_stdlog, "target_terminal_ours_for_output ()\n"); |
| 2827 | } |
| 2828 | |
| 2829 | static void |
| 2830 | debug_to_terminal_ours (void) |
| 2831 | { |
| 2832 | debug_target.to_terminal_ours (); |
| 2833 | |
| 2834 | fprintf_unfiltered (gdb_stdlog, "target_terminal_ours ()\n"); |
| 2835 | } |
| 2836 | |
| 2837 | static void |
| 2838 | debug_to_terminal_save_ours (void) |
| 2839 | { |
| 2840 | debug_target.to_terminal_save_ours (); |
| 2841 | |
| 2842 | fprintf_unfiltered (gdb_stdlog, "target_terminal_save_ours ()\n"); |
| 2843 | } |
| 2844 | |
| 2845 | static void |
| 2846 | debug_to_terminal_info (char *arg, int from_tty) |
| 2847 | { |
| 2848 | debug_target.to_terminal_info (arg, from_tty); |
| 2849 | |
| 2850 | fprintf_unfiltered (gdb_stdlog, "target_terminal_info (%s, %d)\n", arg, |
| 2851 | from_tty); |
| 2852 | } |
| 2853 | |
| 2854 | static void |
| 2855 | debug_to_kill (void) |
| 2856 | { |
| 2857 | debug_target.to_kill (); |
| 2858 | |
| 2859 | fprintf_unfiltered (gdb_stdlog, "target_kill ()\n"); |
| 2860 | } |
| 2861 | |
| 2862 | static void |
| 2863 | debug_to_load (char *args, int from_tty) |
| 2864 | { |
| 2865 | debug_target.to_load (args, from_tty); |
| 2866 | |
| 2867 | fprintf_unfiltered (gdb_stdlog, "target_load (%s, %d)\n", args, from_tty); |
| 2868 | } |
| 2869 | |
| 2870 | static int |
| 2871 | debug_to_lookup_symbol (char *name, CORE_ADDR *addrp) |
| 2872 | { |
| 2873 | int retval; |
| 2874 | |
| 2875 | retval = debug_target.to_lookup_symbol (name, addrp); |
| 2876 | |
| 2877 | fprintf_unfiltered (gdb_stdlog, "target_lookup_symbol (%s, xxx)\n", name); |
| 2878 | |
| 2879 | return retval; |
| 2880 | } |
| 2881 | |
| 2882 | static void |
| 2883 | debug_to_create_inferior (char *exec_file, char *args, char **env, |
| 2884 | int from_tty) |
| 2885 | { |
| 2886 | debug_target.to_create_inferior (exec_file, args, env, from_tty); |
| 2887 | |
| 2888 | fprintf_unfiltered (gdb_stdlog, "target_create_inferior (%s, %s, xxx, %d)\n", |
| 2889 | exec_file, args, from_tty); |
| 2890 | } |
| 2891 | |
| 2892 | static void |
| 2893 | debug_to_post_startup_inferior (ptid_t ptid) |
| 2894 | { |
| 2895 | debug_target.to_post_startup_inferior (ptid); |
| 2896 | |
| 2897 | fprintf_unfiltered (gdb_stdlog, "target_post_startup_inferior (%d)\n", |
| 2898 | PIDGET (ptid)); |
| 2899 | } |
| 2900 | |
| 2901 | static void |
| 2902 | debug_to_acknowledge_created_inferior (int pid) |
| 2903 | { |
| 2904 | debug_target.to_acknowledge_created_inferior (pid); |
| 2905 | |
| 2906 | fprintf_unfiltered (gdb_stdlog, "target_acknowledge_created_inferior (%d)\n", |
| 2907 | pid); |
| 2908 | } |
| 2909 | |
| 2910 | static void |
| 2911 | debug_to_insert_fork_catchpoint (int pid) |
| 2912 | { |
| 2913 | debug_target.to_insert_fork_catchpoint (pid); |
| 2914 | |
| 2915 | fprintf_unfiltered (gdb_stdlog, "target_insert_fork_catchpoint (%d)\n", |
| 2916 | pid); |
| 2917 | } |
| 2918 | |
| 2919 | static int |
| 2920 | debug_to_remove_fork_catchpoint (int pid) |
| 2921 | { |
| 2922 | int retval; |
| 2923 | |
| 2924 | retval = debug_target.to_remove_fork_catchpoint (pid); |
| 2925 | |
| 2926 | fprintf_unfiltered (gdb_stdlog, "target_remove_fork_catchpoint (%d) = %d\n", |
| 2927 | pid, retval); |
| 2928 | |
| 2929 | return retval; |
| 2930 | } |
| 2931 | |
| 2932 | static void |
| 2933 | debug_to_insert_vfork_catchpoint (int pid) |
| 2934 | { |
| 2935 | debug_target.to_insert_vfork_catchpoint (pid); |
| 2936 | |
| 2937 | fprintf_unfiltered (gdb_stdlog, "target_insert_vfork_catchpoint (%d)\n", |
| 2938 | pid); |
| 2939 | } |
| 2940 | |
| 2941 | static int |
| 2942 | debug_to_remove_vfork_catchpoint (int pid) |
| 2943 | { |
| 2944 | int retval; |
| 2945 | |
| 2946 | retval = debug_target.to_remove_vfork_catchpoint (pid); |
| 2947 | |
| 2948 | fprintf_unfiltered (gdb_stdlog, "target_remove_vfork_catchpoint (%d) = %d\n", |
| 2949 | pid, retval); |
| 2950 | |
| 2951 | return retval; |
| 2952 | } |
| 2953 | |
| 2954 | static void |
| 2955 | debug_to_insert_exec_catchpoint (int pid) |
| 2956 | { |
| 2957 | debug_target.to_insert_exec_catchpoint (pid); |
| 2958 | |
| 2959 | fprintf_unfiltered (gdb_stdlog, "target_insert_exec_catchpoint (%d)\n", |
| 2960 | pid); |
| 2961 | } |
| 2962 | |
| 2963 | static int |
| 2964 | debug_to_remove_exec_catchpoint (int pid) |
| 2965 | { |
| 2966 | int retval; |
| 2967 | |
| 2968 | retval = debug_target.to_remove_exec_catchpoint (pid); |
| 2969 | |
| 2970 | fprintf_unfiltered (gdb_stdlog, "target_remove_exec_catchpoint (%d) = %d\n", |
| 2971 | pid, retval); |
| 2972 | |
| 2973 | return retval; |
| 2974 | } |
| 2975 | |
| 2976 | static int |
| 2977 | debug_to_has_exited (int pid, int wait_status, int *exit_status) |
| 2978 | { |
| 2979 | int has_exited; |
| 2980 | |
| 2981 | has_exited = debug_target.to_has_exited (pid, wait_status, exit_status); |
| 2982 | |
| 2983 | fprintf_unfiltered (gdb_stdlog, "target_has_exited (%d, %d, %d) = %d\n", |
| 2984 | pid, wait_status, *exit_status, has_exited); |
| 2985 | |
| 2986 | return has_exited; |
| 2987 | } |
| 2988 | |
| 2989 | static void |
| 2990 | debug_to_mourn_inferior (void) |
| 2991 | { |
| 2992 | debug_target.to_mourn_inferior (); |
| 2993 | |
| 2994 | fprintf_unfiltered (gdb_stdlog, "target_mourn_inferior ()\n"); |
| 2995 | } |
| 2996 | |
| 2997 | static int |
| 2998 | debug_to_can_run (void) |
| 2999 | { |
| 3000 | int retval; |
| 3001 | |
| 3002 | retval = debug_target.to_can_run (); |
| 3003 | |
| 3004 | fprintf_unfiltered (gdb_stdlog, "target_can_run () = %d\n", retval); |
| 3005 | |
| 3006 | return retval; |
| 3007 | } |
| 3008 | |
| 3009 | static void |
| 3010 | debug_to_notice_signals (ptid_t ptid) |
| 3011 | { |
| 3012 | debug_target.to_notice_signals (ptid); |
| 3013 | |
| 3014 | fprintf_unfiltered (gdb_stdlog, "target_notice_signals (%d)\n", |
| 3015 | PIDGET (ptid)); |
| 3016 | } |
| 3017 | |
| 3018 | static int |
| 3019 | debug_to_thread_alive (ptid_t ptid) |
| 3020 | { |
| 3021 | int retval; |
| 3022 | |
| 3023 | retval = debug_target.to_thread_alive (ptid); |
| 3024 | |
| 3025 | fprintf_unfiltered (gdb_stdlog, "target_thread_alive (%d) = %d\n", |
| 3026 | PIDGET (ptid), retval); |
| 3027 | |
| 3028 | return retval; |
| 3029 | } |
| 3030 | |
| 3031 | static void |
| 3032 | debug_to_find_new_threads (void) |
| 3033 | { |
| 3034 | debug_target.to_find_new_threads (); |
| 3035 | |
| 3036 | fputs_unfiltered ("target_find_new_threads ()\n", gdb_stdlog); |
| 3037 | } |
| 3038 | |
| 3039 | static void |
| 3040 | debug_to_stop (ptid_t ptid) |
| 3041 | { |
| 3042 | debug_target.to_stop (ptid); |
| 3043 | |
| 3044 | fprintf_unfiltered (gdb_stdlog, "target_stop (%s)\n", |
| 3045 | target_pid_to_str (ptid)); |
| 3046 | } |
| 3047 | |
| 3048 | static void |
| 3049 | debug_to_rcmd (char *command, |
| 3050 | struct ui_file *outbuf) |
| 3051 | { |
| 3052 | debug_target.to_rcmd (command, outbuf); |
| 3053 | fprintf_unfiltered (gdb_stdlog, "target_rcmd (%s, ...)\n", command); |
| 3054 | } |
| 3055 | |
| 3056 | static char * |
| 3057 | debug_to_pid_to_exec_file (int pid) |
| 3058 | { |
| 3059 | char *exec_file; |
| 3060 | |
| 3061 | exec_file = debug_target.to_pid_to_exec_file (pid); |
| 3062 | |
| 3063 | fprintf_unfiltered (gdb_stdlog, "target_pid_to_exec_file (%d) = %s\n", |
| 3064 | pid, exec_file); |
| 3065 | |
| 3066 | return exec_file; |
| 3067 | } |
| 3068 | |
| 3069 | static void |
| 3070 | setup_target_debug (void) |
| 3071 | { |
| 3072 | memcpy (&debug_target, ¤t_target, sizeof debug_target); |
| 3073 | |
| 3074 | current_target.to_open = debug_to_open; |
| 3075 | current_target.to_close = debug_to_close; |
| 3076 | current_target.to_attach = debug_to_attach; |
| 3077 | current_target.to_post_attach = debug_to_post_attach; |
| 3078 | current_target.to_detach = debug_to_detach; |
| 3079 | current_target.to_resume = debug_to_resume; |
| 3080 | current_target.to_wait = debug_to_wait; |
| 3081 | current_target.to_fetch_registers = debug_to_fetch_registers; |
| 3082 | current_target.to_store_registers = debug_to_store_registers; |
| 3083 | current_target.to_prepare_to_store = debug_to_prepare_to_store; |
| 3084 | current_target.deprecated_xfer_memory = deprecated_debug_xfer_memory; |
| 3085 | current_target.to_files_info = debug_to_files_info; |
| 3086 | current_target.to_insert_breakpoint = debug_to_insert_breakpoint; |
| 3087 | current_target.to_remove_breakpoint = debug_to_remove_breakpoint; |
| 3088 | current_target.to_can_use_hw_breakpoint = debug_to_can_use_hw_breakpoint; |
| 3089 | current_target.to_insert_hw_breakpoint = debug_to_insert_hw_breakpoint; |
| 3090 | current_target.to_remove_hw_breakpoint = debug_to_remove_hw_breakpoint; |
| 3091 | current_target.to_insert_watchpoint = debug_to_insert_watchpoint; |
| 3092 | current_target.to_remove_watchpoint = debug_to_remove_watchpoint; |
| 3093 | current_target.to_stopped_by_watchpoint = debug_to_stopped_by_watchpoint; |
| 3094 | current_target.to_stopped_data_address = debug_to_stopped_data_address; |
| 3095 | current_target.to_watchpoint_addr_within_range = debug_to_watchpoint_addr_within_range; |
| 3096 | current_target.to_region_ok_for_hw_watchpoint = debug_to_region_ok_for_hw_watchpoint; |
| 3097 | current_target.to_terminal_init = debug_to_terminal_init; |
| 3098 | current_target.to_terminal_inferior = debug_to_terminal_inferior; |
| 3099 | current_target.to_terminal_ours_for_output = debug_to_terminal_ours_for_output; |
| 3100 | current_target.to_terminal_ours = debug_to_terminal_ours; |
| 3101 | current_target.to_terminal_save_ours = debug_to_terminal_save_ours; |
| 3102 | current_target.to_terminal_info = debug_to_terminal_info; |
| 3103 | current_target.to_kill = debug_to_kill; |
| 3104 | current_target.to_load = debug_to_load; |
| 3105 | current_target.to_lookup_symbol = debug_to_lookup_symbol; |
| 3106 | current_target.to_create_inferior = debug_to_create_inferior; |
| 3107 | current_target.to_post_startup_inferior = debug_to_post_startup_inferior; |
| 3108 | current_target.to_acknowledge_created_inferior = debug_to_acknowledge_created_inferior; |
| 3109 | current_target.to_insert_fork_catchpoint = debug_to_insert_fork_catchpoint; |
| 3110 | current_target.to_remove_fork_catchpoint = debug_to_remove_fork_catchpoint; |
| 3111 | current_target.to_insert_vfork_catchpoint = debug_to_insert_vfork_catchpoint; |
| 3112 | current_target.to_remove_vfork_catchpoint = debug_to_remove_vfork_catchpoint; |
| 3113 | current_target.to_insert_exec_catchpoint = debug_to_insert_exec_catchpoint; |
| 3114 | current_target.to_remove_exec_catchpoint = debug_to_remove_exec_catchpoint; |
| 3115 | current_target.to_has_exited = debug_to_has_exited; |
| 3116 | current_target.to_mourn_inferior = debug_to_mourn_inferior; |
| 3117 | current_target.to_can_run = debug_to_can_run; |
| 3118 | current_target.to_notice_signals = debug_to_notice_signals; |
| 3119 | current_target.to_thread_alive = debug_to_thread_alive; |
| 3120 | current_target.to_find_new_threads = debug_to_find_new_threads; |
| 3121 | current_target.to_stop = debug_to_stop; |
| 3122 | current_target.to_rcmd = debug_to_rcmd; |
| 3123 | current_target.to_pid_to_exec_file = debug_to_pid_to_exec_file; |
| 3124 | } |
| 3125 | \f |
| 3126 | |
| 3127 | static char targ_desc[] = |
| 3128 | "Names of targets and files being debugged.\n\ |
| 3129 | Shows the entire stack of targets currently in use (including the exec-file,\n\ |
| 3130 | core-file, and process, if any), as well as the symbol file name."; |
| 3131 | |
| 3132 | static void |
| 3133 | do_monitor_command (char *cmd, |
| 3134 | int from_tty) |
| 3135 | { |
| 3136 | if ((current_target.to_rcmd |
| 3137 | == (void (*) (char *, struct ui_file *)) tcomplain) |
| 3138 | || (current_target.to_rcmd == debug_to_rcmd |
| 3139 | && (debug_target.to_rcmd |
| 3140 | == (void (*) (char *, struct ui_file *)) tcomplain))) |
| 3141 | error (_("\"monitor\" command not supported by this target.")); |
| 3142 | target_rcmd (cmd, gdb_stdtarg); |
| 3143 | } |
| 3144 | |
| 3145 | /* Print the name of each layers of our target stack. */ |
| 3146 | |
| 3147 | static void |
| 3148 | maintenance_print_target_stack (char *cmd, int from_tty) |
| 3149 | { |
| 3150 | struct target_ops *t; |
| 3151 | |
| 3152 | printf_filtered (_("The current target stack is:\n")); |
| 3153 | |
| 3154 | for (t = target_stack; t != NULL; t = t->beneath) |
| 3155 | { |
| 3156 | printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname); |
| 3157 | } |
| 3158 | } |
| 3159 | |
| 3160 | /* Controls if async mode is permitted. */ |
| 3161 | int target_async_permitted = 0; |
| 3162 | |
| 3163 | /* The set command writes to this variable. If the inferior is |
| 3164 | executing, linux_nat_async_permitted is *not* updated. */ |
| 3165 | static int target_async_permitted_1 = 0; |
| 3166 | |
| 3167 | static void |
| 3168 | set_maintenance_target_async_permitted (char *args, int from_tty, |
| 3169 | struct cmd_list_element *c) |
| 3170 | { |
| 3171 | if (target_has_execution) |
| 3172 | { |
| 3173 | target_async_permitted_1 = target_async_permitted; |
| 3174 | error (_("Cannot change this setting while the inferior is running.")); |
| 3175 | } |
| 3176 | |
| 3177 | target_async_permitted = target_async_permitted_1; |
| 3178 | } |
| 3179 | |
| 3180 | static void |
| 3181 | show_maintenance_target_async_permitted (struct ui_file *file, int from_tty, |
| 3182 | struct cmd_list_element *c, |
| 3183 | const char *value) |
| 3184 | { |
| 3185 | fprintf_filtered (file, _("\ |
| 3186 | Controlling the inferior in asynchronous mode is %s.\n"), value); |
| 3187 | } |
| 3188 | |
| 3189 | void |
| 3190 | initialize_targets (void) |
| 3191 | { |
| 3192 | init_dummy_target (); |
| 3193 | push_target (&dummy_target); |
| 3194 | |
| 3195 | add_info ("target", target_info, targ_desc); |
| 3196 | add_info ("files", target_info, targ_desc); |
| 3197 | |
| 3198 | add_setshow_zinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
| 3199 | Set target debugging."), _("\ |
| 3200 | Show target debugging."), _("\ |
| 3201 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
| 3202 | verbose. Changes do not take effect until the next \"run\" or \"target\"\n\ |
| 3203 | command."), |
| 3204 | NULL, |
| 3205 | show_targetdebug, |
| 3206 | &setdebuglist, &showdebuglist); |
| 3207 | |
| 3208 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
| 3209 | &trust_readonly, _("\ |
| 3210 | Set mode for reading from readonly sections."), _("\ |
| 3211 | Show mode for reading from readonly sections."), _("\ |
| 3212 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
| 3213 | will be read from the object file instead of from the target. This will\n\ |
| 3214 | result in significant performance improvement for remote targets."), |
| 3215 | NULL, |
| 3216 | show_trust_readonly, |
| 3217 | &setlist, &showlist); |
| 3218 | |
| 3219 | add_com ("monitor", class_obscure, do_monitor_command, |
| 3220 | _("Send a command to the remote monitor (remote targets only).")); |
| 3221 | |
| 3222 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
| 3223 | _("Print the name of each layer of the internal target stack."), |
| 3224 | &maintenanceprintlist); |
| 3225 | |
| 3226 | add_setshow_boolean_cmd ("target-async", no_class, |
| 3227 | &target_async_permitted_1, _("\ |
| 3228 | Set whether gdb controls the inferior in asynchronous mode."), _("\ |
| 3229 | Show whether gdb controls the inferior in asynchronous mode."), _("\ |
| 3230 | Tells gdb whether to control the inferior in asynchronous mode."), |
| 3231 | set_maintenance_target_async_permitted, |
| 3232 | show_maintenance_target_async_permitted, |
| 3233 | &setlist, |
| 3234 | &showlist); |
| 3235 | |
| 3236 | target_dcache = dcache_init (); |
| 3237 | } |