| 1 | /* Interface between GDB and target environments, including files and processes |
| 2 | Copyright 1990-1994, 1999, 2000, 2001 Free Software Foundation, Inc. |
| 3 | Contributed by Cygnus Support. Written by John Gilmore. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | #if !defined (TARGET_H) |
| 23 | #define TARGET_H |
| 24 | |
| 25 | /* This include file defines the interface between the main part |
| 26 | of the debugger, and the part which is target-specific, or |
| 27 | specific to the communications interface between us and the |
| 28 | target. |
| 29 | |
| 30 | A TARGET is an interface between the debugger and a particular |
| 31 | kind of file or process. Targets can be STACKED in STRATA, |
| 32 | so that more than one target can potentially respond to a request. |
| 33 | In particular, memory accesses will walk down the stack of targets |
| 34 | until they find a target that is interested in handling that particular |
| 35 | address. STRATA are artificial boundaries on the stack, within |
| 36 | which particular kinds of targets live. Strata exist so that |
| 37 | people don't get confused by pushing e.g. a process target and then |
| 38 | a file target, and wondering why they can't see the current values |
| 39 | of variables any more (the file target is handling them and they |
| 40 | never get to the process target). So when you push a file target, |
| 41 | it goes into the file stratum, which is always below the process |
| 42 | stratum. */ |
| 43 | |
| 44 | #include "bfd.h" |
| 45 | #include "symtab.h" |
| 46 | #include "dcache.h" |
| 47 | #include "memattr.h" |
| 48 | |
| 49 | enum strata |
| 50 | { |
| 51 | dummy_stratum, /* The lowest of the low */ |
| 52 | file_stratum, /* Executable files, etc */ |
| 53 | core_stratum, /* Core dump files */ |
| 54 | download_stratum, /* Downloading of remote targets */ |
| 55 | process_stratum, /* Executing processes */ |
| 56 | thread_stratum /* Executing threads */ |
| 57 | }; |
| 58 | |
| 59 | enum thread_control_capabilities |
| 60 | { |
| 61 | tc_none = 0, /* Default: can't control thread execution. */ |
| 62 | tc_schedlock = 1, /* Can lock the thread scheduler. */ |
| 63 | tc_switch = 2 /* Can switch the running thread on demand. */ |
| 64 | }; |
| 65 | |
| 66 | /* Stuff for target_wait. */ |
| 67 | |
| 68 | /* Generally, what has the program done? */ |
| 69 | enum target_waitkind |
| 70 | { |
| 71 | /* The program has exited. The exit status is in value.integer. */ |
| 72 | TARGET_WAITKIND_EXITED, |
| 73 | |
| 74 | /* The program has stopped with a signal. Which signal is in |
| 75 | value.sig. */ |
| 76 | TARGET_WAITKIND_STOPPED, |
| 77 | |
| 78 | /* The program has terminated with a signal. Which signal is in |
| 79 | value.sig. */ |
| 80 | TARGET_WAITKIND_SIGNALLED, |
| 81 | |
| 82 | /* The program is letting us know that it dynamically loaded something |
| 83 | (e.g. it called load(2) on AIX). */ |
| 84 | TARGET_WAITKIND_LOADED, |
| 85 | |
| 86 | /* The program has forked. A "related" process' ID is in |
| 87 | value.related_pid. I.e., if the child forks, value.related_pid |
| 88 | is the parent's ID. */ |
| 89 | |
| 90 | TARGET_WAITKIND_FORKED, |
| 91 | |
| 92 | /* The program has vforked. A "related" process's ID is in |
| 93 | value.related_pid. */ |
| 94 | |
| 95 | TARGET_WAITKIND_VFORKED, |
| 96 | |
| 97 | /* The program has exec'ed a new executable file. The new file's |
| 98 | pathname is pointed to by value.execd_pathname. */ |
| 99 | |
| 100 | TARGET_WAITKIND_EXECD, |
| 101 | |
| 102 | /* The program has entered or returned from a system call. On |
| 103 | HP-UX, this is used in the hardware watchpoint implementation. |
| 104 | The syscall's unique integer ID number is in value.syscall_id */ |
| 105 | |
| 106 | TARGET_WAITKIND_SYSCALL_ENTRY, |
| 107 | TARGET_WAITKIND_SYSCALL_RETURN, |
| 108 | |
| 109 | /* Nothing happened, but we stopped anyway. This perhaps should be handled |
| 110 | within target_wait, but I'm not sure target_wait should be resuming the |
| 111 | inferior. */ |
| 112 | TARGET_WAITKIND_SPURIOUS, |
| 113 | |
| 114 | /* This is used for target async and extended-async |
| 115 | only. Remote_async_wait() returns this when there is an event |
| 116 | on the inferior, but the rest of the world is not interested in |
| 117 | it. The inferior has not stopped, but has just sent some output |
| 118 | to the console, for instance. In this case, we want to go back |
| 119 | to the event loop and wait there for another event from the |
| 120 | inferior, rather than being stuck in the remote_async_wait() |
| 121 | function. This way the event loop is responsive to other events, |
| 122 | like for instance the user typing. */ |
| 123 | TARGET_WAITKIND_IGNORE |
| 124 | }; |
| 125 | |
| 126 | /* The numbering of these signals is chosen to match traditional unix |
| 127 | signals (insofar as various unices use the same numbers, anyway). |
| 128 | It is also the numbering of the GDB remote protocol. Other remote |
| 129 | protocols, if they use a different numbering, should make sure to |
| 130 | translate appropriately. |
| 131 | |
| 132 | Since these numbers have actually made it out into other software |
| 133 | (stubs, etc.), you mustn't disturb the assigned numbering. If you |
| 134 | need to add new signals here, add them to the end of the explicitly |
| 135 | numbered signals. |
| 136 | |
| 137 | This is based strongly on Unix/POSIX signals for several reasons: |
| 138 | (1) This set of signals represents a widely-accepted attempt to |
| 139 | represent events of this sort in a portable fashion, (2) we want a |
| 140 | signal to make it from wait to child_wait to the user intact, (3) many |
| 141 | remote protocols use a similar encoding. However, it is |
| 142 | recognized that this set of signals has limitations (such as not |
| 143 | distinguishing between various kinds of SIGSEGV, or not |
| 144 | distinguishing hitting a breakpoint from finishing a single step). |
| 145 | So in the future we may get around this either by adding additional |
| 146 | signals for breakpoint, single-step, etc., or by adding signal |
| 147 | codes; the latter seems more in the spirit of what BSD, System V, |
| 148 | etc. are doing to address these issues. */ |
| 149 | |
| 150 | /* For an explanation of what each signal means, see |
| 151 | target_signal_to_string. */ |
| 152 | |
| 153 | enum target_signal |
| 154 | { |
| 155 | /* Used some places (e.g. stop_signal) to record the concept that |
| 156 | there is no signal. */ |
| 157 | TARGET_SIGNAL_0 = 0, |
| 158 | TARGET_SIGNAL_FIRST = 0, |
| 159 | TARGET_SIGNAL_HUP = 1, |
| 160 | TARGET_SIGNAL_INT = 2, |
| 161 | TARGET_SIGNAL_QUIT = 3, |
| 162 | TARGET_SIGNAL_ILL = 4, |
| 163 | TARGET_SIGNAL_TRAP = 5, |
| 164 | TARGET_SIGNAL_ABRT = 6, |
| 165 | TARGET_SIGNAL_EMT = 7, |
| 166 | TARGET_SIGNAL_FPE = 8, |
| 167 | TARGET_SIGNAL_KILL = 9, |
| 168 | TARGET_SIGNAL_BUS = 10, |
| 169 | TARGET_SIGNAL_SEGV = 11, |
| 170 | TARGET_SIGNAL_SYS = 12, |
| 171 | TARGET_SIGNAL_PIPE = 13, |
| 172 | TARGET_SIGNAL_ALRM = 14, |
| 173 | TARGET_SIGNAL_TERM = 15, |
| 174 | TARGET_SIGNAL_URG = 16, |
| 175 | TARGET_SIGNAL_STOP = 17, |
| 176 | TARGET_SIGNAL_TSTP = 18, |
| 177 | TARGET_SIGNAL_CONT = 19, |
| 178 | TARGET_SIGNAL_CHLD = 20, |
| 179 | TARGET_SIGNAL_TTIN = 21, |
| 180 | TARGET_SIGNAL_TTOU = 22, |
| 181 | TARGET_SIGNAL_IO = 23, |
| 182 | TARGET_SIGNAL_XCPU = 24, |
| 183 | TARGET_SIGNAL_XFSZ = 25, |
| 184 | TARGET_SIGNAL_VTALRM = 26, |
| 185 | TARGET_SIGNAL_PROF = 27, |
| 186 | TARGET_SIGNAL_WINCH = 28, |
| 187 | TARGET_SIGNAL_LOST = 29, |
| 188 | TARGET_SIGNAL_USR1 = 30, |
| 189 | TARGET_SIGNAL_USR2 = 31, |
| 190 | TARGET_SIGNAL_PWR = 32, |
| 191 | /* Similar to SIGIO. Perhaps they should have the same number. */ |
| 192 | TARGET_SIGNAL_POLL = 33, |
| 193 | TARGET_SIGNAL_WIND = 34, |
| 194 | TARGET_SIGNAL_PHONE = 35, |
| 195 | TARGET_SIGNAL_WAITING = 36, |
| 196 | TARGET_SIGNAL_LWP = 37, |
| 197 | TARGET_SIGNAL_DANGER = 38, |
| 198 | TARGET_SIGNAL_GRANT = 39, |
| 199 | TARGET_SIGNAL_RETRACT = 40, |
| 200 | TARGET_SIGNAL_MSG = 41, |
| 201 | TARGET_SIGNAL_SOUND = 42, |
| 202 | TARGET_SIGNAL_SAK = 43, |
| 203 | TARGET_SIGNAL_PRIO = 44, |
| 204 | TARGET_SIGNAL_REALTIME_33 = 45, |
| 205 | TARGET_SIGNAL_REALTIME_34 = 46, |
| 206 | TARGET_SIGNAL_REALTIME_35 = 47, |
| 207 | TARGET_SIGNAL_REALTIME_36 = 48, |
| 208 | TARGET_SIGNAL_REALTIME_37 = 49, |
| 209 | TARGET_SIGNAL_REALTIME_38 = 50, |
| 210 | TARGET_SIGNAL_REALTIME_39 = 51, |
| 211 | TARGET_SIGNAL_REALTIME_40 = 52, |
| 212 | TARGET_SIGNAL_REALTIME_41 = 53, |
| 213 | TARGET_SIGNAL_REALTIME_42 = 54, |
| 214 | TARGET_SIGNAL_REALTIME_43 = 55, |
| 215 | TARGET_SIGNAL_REALTIME_44 = 56, |
| 216 | TARGET_SIGNAL_REALTIME_45 = 57, |
| 217 | TARGET_SIGNAL_REALTIME_46 = 58, |
| 218 | TARGET_SIGNAL_REALTIME_47 = 59, |
| 219 | TARGET_SIGNAL_REALTIME_48 = 60, |
| 220 | TARGET_SIGNAL_REALTIME_49 = 61, |
| 221 | TARGET_SIGNAL_REALTIME_50 = 62, |
| 222 | TARGET_SIGNAL_REALTIME_51 = 63, |
| 223 | TARGET_SIGNAL_REALTIME_52 = 64, |
| 224 | TARGET_SIGNAL_REALTIME_53 = 65, |
| 225 | TARGET_SIGNAL_REALTIME_54 = 66, |
| 226 | TARGET_SIGNAL_REALTIME_55 = 67, |
| 227 | TARGET_SIGNAL_REALTIME_56 = 68, |
| 228 | TARGET_SIGNAL_REALTIME_57 = 69, |
| 229 | TARGET_SIGNAL_REALTIME_58 = 70, |
| 230 | TARGET_SIGNAL_REALTIME_59 = 71, |
| 231 | TARGET_SIGNAL_REALTIME_60 = 72, |
| 232 | TARGET_SIGNAL_REALTIME_61 = 73, |
| 233 | TARGET_SIGNAL_REALTIME_62 = 74, |
| 234 | TARGET_SIGNAL_REALTIME_63 = 75, |
| 235 | |
| 236 | /* Used internally by Solaris threads. See signal(5) on Solaris. */ |
| 237 | TARGET_SIGNAL_CANCEL = 76, |
| 238 | |
| 239 | /* Yes, this pains me, too. But LynxOS didn't have SIG32, and now |
| 240 | Linux does, and we can't disturb the numbering, since it's part |
| 241 | of the protocol. Note that in some GDB's TARGET_SIGNAL_REALTIME_32 |
| 242 | is number 76. */ |
| 243 | TARGET_SIGNAL_REALTIME_32, |
| 244 | /* Yet another pain, IRIX 6 has SIG64. */ |
| 245 | TARGET_SIGNAL_REALTIME_64, |
| 246 | |
| 247 | #if defined(MACH) || defined(__MACH__) |
| 248 | /* Mach exceptions */ |
| 249 | TARGET_EXC_BAD_ACCESS, |
| 250 | TARGET_EXC_BAD_INSTRUCTION, |
| 251 | TARGET_EXC_ARITHMETIC, |
| 252 | TARGET_EXC_EMULATION, |
| 253 | TARGET_EXC_SOFTWARE, |
| 254 | TARGET_EXC_BREAKPOINT, |
| 255 | #endif |
| 256 | TARGET_SIGNAL_INFO, |
| 257 | |
| 258 | /* Some signal we don't know about. */ |
| 259 | TARGET_SIGNAL_UNKNOWN, |
| 260 | |
| 261 | /* Use whatever signal we use when one is not specifically specified |
| 262 | (for passing to proceed and so on). */ |
| 263 | TARGET_SIGNAL_DEFAULT, |
| 264 | |
| 265 | /* Last and unused enum value, for sizing arrays, etc. */ |
| 266 | TARGET_SIGNAL_LAST |
| 267 | }; |
| 268 | |
| 269 | struct target_waitstatus |
| 270 | { |
| 271 | enum target_waitkind kind; |
| 272 | |
| 273 | /* Forked child pid, execd pathname, exit status or signal number. */ |
| 274 | union |
| 275 | { |
| 276 | int integer; |
| 277 | enum target_signal sig; |
| 278 | int related_pid; |
| 279 | char *execd_pathname; |
| 280 | int syscall_id; |
| 281 | } |
| 282 | value; |
| 283 | }; |
| 284 | |
| 285 | /* Possible types of events that the inferior handler will have to |
| 286 | deal with. */ |
| 287 | enum inferior_event_type |
| 288 | { |
| 289 | /* There is a request to quit the inferior, abandon it. */ |
| 290 | INF_QUIT_REQ, |
| 291 | /* Process a normal inferior event which will result in target_wait |
| 292 | being called. */ |
| 293 | INF_REG_EVENT, |
| 294 | /* Deal with an error on the inferior. */ |
| 295 | INF_ERROR, |
| 296 | /* We are called because a timer went off. */ |
| 297 | INF_TIMER, |
| 298 | /* We are called to do stuff after the inferior stops. */ |
| 299 | INF_EXEC_COMPLETE, |
| 300 | /* We are called to do some stuff after the inferior stops, but we |
| 301 | are expected to reenter the proceed() and |
| 302 | handle_inferior_event() functions. This is used only in case of |
| 303 | 'step n' like commands. */ |
| 304 | INF_EXEC_CONTINUE |
| 305 | }; |
| 306 | |
| 307 | /* Return the string for a signal. */ |
| 308 | extern char *target_signal_to_string (enum target_signal); |
| 309 | |
| 310 | /* Return the name (SIGHUP, etc.) for a signal. */ |
| 311 | extern char *target_signal_to_name (enum target_signal); |
| 312 | |
| 313 | /* Given a name (SIGHUP, etc.), return its signal. */ |
| 314 | enum target_signal target_signal_from_name (char *); |
| 315 | \f |
| 316 | |
| 317 | /* If certain kinds of activity happen, target_wait should perform |
| 318 | callbacks. */ |
| 319 | /* Right now we just call (*TARGET_ACTIVITY_FUNCTION) if I/O is possible |
| 320 | on TARGET_ACTIVITY_FD. */ |
| 321 | extern int target_activity_fd; |
| 322 | /* Returns zero to leave the inferior alone, one to interrupt it. */ |
| 323 | extern int (*target_activity_function) (void); |
| 324 | \f |
| 325 | struct thread_info; /* fwd decl for parameter list below: */ |
| 326 | |
| 327 | struct target_ops |
| 328 | { |
| 329 | char *to_shortname; /* Name this target type */ |
| 330 | char *to_longname; /* Name for printing */ |
| 331 | char *to_doc; /* Documentation. Does not include trailing |
| 332 | newline, and starts with a one-line descrip- |
| 333 | tion (probably similar to to_longname). */ |
| 334 | void (*to_open) (char *, int); |
| 335 | void (*to_close) (int); |
| 336 | void (*to_attach) (char *, int); |
| 337 | void (*to_post_attach) (int); |
| 338 | void (*to_require_attach) (char *, int); |
| 339 | void (*to_detach) (char *, int); |
| 340 | void (*to_require_detach) (int, char *, int); |
| 341 | void (*to_resume) (int, int, enum target_signal); |
| 342 | int (*to_wait) (int, struct target_waitstatus *); |
| 343 | void (*to_post_wait) (int, int); |
| 344 | void (*to_fetch_registers) (int); |
| 345 | void (*to_store_registers) (int); |
| 346 | void (*to_prepare_to_store) (void); |
| 347 | |
| 348 | /* Transfer LEN bytes of memory between GDB address MYADDR and |
| 349 | target address MEMADDR. If WRITE, transfer them to the target, else |
| 350 | transfer them from the target. TARGET is the target from which we |
| 351 | get this function. |
| 352 | |
| 353 | Return value, N, is one of the following: |
| 354 | |
| 355 | 0 means that we can't handle this. If errno has been set, it is the |
| 356 | error which prevented us from doing it (FIXME: What about bfd_error?). |
| 357 | |
| 358 | positive (call it N) means that we have transferred N bytes |
| 359 | starting at MEMADDR. We might be able to handle more bytes |
| 360 | beyond this length, but no promises. |
| 361 | |
| 362 | negative (call its absolute value N) means that we cannot |
| 363 | transfer right at MEMADDR, but we could transfer at least |
| 364 | something at MEMADDR + N. */ |
| 365 | |
| 366 | int (*to_xfer_memory) (CORE_ADDR memaddr, char *myaddr, |
| 367 | int len, int write, |
| 368 | struct mem_attrib *attrib, |
| 369 | struct target_ops *target); |
| 370 | |
| 371 | #if 0 |
| 372 | /* Enable this after 4.12. */ |
| 373 | |
| 374 | /* Search target memory. Start at STARTADDR and take LEN bytes of |
| 375 | target memory, and them with MASK, and compare to DATA. If they |
| 376 | match, set *ADDR_FOUND to the address we found it at, store the data |
| 377 | we found at LEN bytes starting at DATA_FOUND, and return. If |
| 378 | not, add INCREMENT to the search address and keep trying until |
| 379 | the search address is outside of the range [LORANGE,HIRANGE). |
| 380 | |
| 381 | If we don't find anything, set *ADDR_FOUND to (CORE_ADDR)0 and |
| 382 | return. */ |
| 383 | |
| 384 | void (*to_search) (int len, char *data, char *mask, |
| 385 | CORE_ADDR startaddr, int increment, |
| 386 | CORE_ADDR lorange, CORE_ADDR hirange, |
| 387 | CORE_ADDR * addr_found, char *data_found); |
| 388 | |
| 389 | #define target_search(len, data, mask, startaddr, increment, lorange, hirange, addr_found, data_found) \ |
| 390 | (*current_target.to_search) (len, data, mask, startaddr, increment, \ |
| 391 | lorange, hirange, addr_found, data_found) |
| 392 | #endif /* 0 */ |
| 393 | |
| 394 | void (*to_files_info) (struct target_ops *); |
| 395 | int (*to_insert_breakpoint) (CORE_ADDR, char *); |
| 396 | int (*to_remove_breakpoint) (CORE_ADDR, char *); |
| 397 | void (*to_terminal_init) (void); |
| 398 | void (*to_terminal_inferior) (void); |
| 399 | void (*to_terminal_ours_for_output) (void); |
| 400 | void (*to_terminal_ours) (void); |
| 401 | void (*to_terminal_info) (char *, int); |
| 402 | void (*to_kill) (void); |
| 403 | void (*to_load) (char *, int); |
| 404 | int (*to_lookup_symbol) (char *, CORE_ADDR *); |
| 405 | void (*to_create_inferior) (char *, char *, char **); |
| 406 | void (*to_post_startup_inferior) (int); |
| 407 | void (*to_acknowledge_created_inferior) (int); |
| 408 | void (*to_clone_and_follow_inferior) (int, int *); |
| 409 | void (*to_post_follow_inferior_by_clone) (void); |
| 410 | int (*to_insert_fork_catchpoint) (int); |
| 411 | int (*to_remove_fork_catchpoint) (int); |
| 412 | int (*to_insert_vfork_catchpoint) (int); |
| 413 | int (*to_remove_vfork_catchpoint) (int); |
| 414 | int (*to_has_forked) (int, int *); |
| 415 | int (*to_has_vforked) (int, int *); |
| 416 | int (*to_can_follow_vfork_prior_to_exec) (void); |
| 417 | void (*to_post_follow_vfork) (int, int, int, int); |
| 418 | int (*to_insert_exec_catchpoint) (int); |
| 419 | int (*to_remove_exec_catchpoint) (int); |
| 420 | int (*to_has_execd) (int, char **); |
| 421 | int (*to_reported_exec_events_per_exec_call) (void); |
| 422 | int (*to_has_syscall_event) (int, enum target_waitkind *, int *); |
| 423 | int (*to_has_exited) (int, int, int *); |
| 424 | void (*to_mourn_inferior) (void); |
| 425 | int (*to_can_run) (void); |
| 426 | void (*to_notice_signals) (int pid); |
| 427 | int (*to_thread_alive) (int pid); |
| 428 | void (*to_find_new_threads) (void); |
| 429 | char *(*to_pid_to_str) (int); |
| 430 | char *(*to_extra_thread_info) (struct thread_info *); |
| 431 | void (*to_stop) (void); |
| 432 | int (*to_query) (int /*char */ , char *, char *, int *); |
| 433 | void (*to_rcmd) (char *command, struct ui_file *output); |
| 434 | struct symtab_and_line *(*to_enable_exception_callback) (enum |
| 435 | exception_event_kind, |
| 436 | int); |
| 437 | struct exception_event_record *(*to_get_current_exception_event) (void); |
| 438 | char *(*to_pid_to_exec_file) (int pid); |
| 439 | char *(*to_core_file_to_sym_file) (char *); |
| 440 | enum strata to_stratum; |
| 441 | struct target_ops |
| 442 | *DONT_USE; /* formerly to_next */ |
| 443 | int to_has_all_memory; |
| 444 | int to_has_memory; |
| 445 | int to_has_stack; |
| 446 | int to_has_registers; |
| 447 | int to_has_execution; |
| 448 | int to_has_thread_control; /* control thread execution */ |
| 449 | struct section_table |
| 450 | *to_sections; |
| 451 | struct section_table |
| 452 | *to_sections_end; |
| 453 | /* ASYNC target controls */ |
| 454 | int (*to_can_async_p) (void); |
| 455 | int (*to_is_async_p) (void); |
| 456 | void (*to_async) (void (*cb) (enum inferior_event_type, void *context), |
| 457 | void *context); |
| 458 | int to_async_mask_value; |
| 459 | int to_magic; |
| 460 | /* Need sub-structure for target machine related rather than comm related? |
| 461 | */ |
| 462 | }; |
| 463 | |
| 464 | /* Magic number for checking ops size. If a struct doesn't end with this |
| 465 | number, somebody changed the declaration but didn't change all the |
| 466 | places that initialize one. */ |
| 467 | |
| 468 | #define OPS_MAGIC 3840 |
| 469 | |
| 470 | /* The ops structure for our "current" target process. This should |
| 471 | never be NULL. If there is no target, it points to the dummy_target. */ |
| 472 | |
| 473 | extern struct target_ops current_target; |
| 474 | |
| 475 | /* An item on the target stack. */ |
| 476 | |
| 477 | struct target_stack_item |
| 478 | { |
| 479 | struct target_stack_item *next; |
| 480 | struct target_ops *target_ops; |
| 481 | }; |
| 482 | |
| 483 | /* The target stack. */ |
| 484 | |
| 485 | extern struct target_stack_item *target_stack; |
| 486 | |
| 487 | /* Define easy words for doing these operations on our current target. */ |
| 488 | |
| 489 | #define target_shortname (current_target.to_shortname) |
| 490 | #define target_longname (current_target.to_longname) |
| 491 | |
| 492 | /* The open routine takes the rest of the parameters from the command, |
| 493 | and (if successful) pushes a new target onto the stack. |
| 494 | Targets should supply this routine, if only to provide an error message. */ |
| 495 | |
| 496 | #define target_open(name, from_tty) \ |
| 497 | do { \ |
| 498 | dcache_invalidate (target_dcache); \ |
| 499 | (*current_target.to_open) (name, from_tty); \ |
| 500 | } while (0) |
| 501 | |
| 502 | /* Does whatever cleanup is required for a target that we are no longer |
| 503 | going to be calling. Argument says whether we are quitting gdb and |
| 504 | should not get hung in case of errors, or whether we want a clean |
| 505 | termination even if it takes a while. This routine is automatically |
| 506 | always called just before a routine is popped off the target stack. |
| 507 | Closing file descriptors and freeing memory are typical things it should |
| 508 | do. */ |
| 509 | |
| 510 | #define target_close(quitting) \ |
| 511 | (*current_target.to_close) (quitting) |
| 512 | |
| 513 | /* Attaches to a process on the target side. Arguments are as passed |
| 514 | to the `attach' command by the user. This routine can be called |
| 515 | when the target is not on the target-stack, if the target_can_run |
| 516 | routine returns 1; in that case, it must push itself onto the stack. |
| 517 | Upon exit, the target should be ready for normal operations, and |
| 518 | should be ready to deliver the status of the process immediately |
| 519 | (without waiting) to an upcoming target_wait call. */ |
| 520 | |
| 521 | #define target_attach(args, from_tty) \ |
| 522 | (*current_target.to_attach) (args, from_tty) |
| 523 | |
| 524 | /* The target_attach operation places a process under debugger control, |
| 525 | and stops the process. |
| 526 | |
| 527 | This operation provides a target-specific hook that allows the |
| 528 | necessary bookkeeping to be performed after an attach completes. */ |
| 529 | #define target_post_attach(pid) \ |
| 530 | (*current_target.to_post_attach) (pid) |
| 531 | |
| 532 | /* Attaches to a process on the target side, if not already attached. |
| 533 | (If already attached, takes no action.) |
| 534 | |
| 535 | This operation can be used to follow the child process of a fork. |
| 536 | On some targets, such child processes of an original inferior process |
| 537 | are automatically under debugger control, and thus do not require an |
| 538 | actual attach operation. */ |
| 539 | |
| 540 | #define target_require_attach(args, from_tty) \ |
| 541 | (*current_target.to_require_attach) (args, from_tty) |
| 542 | |
| 543 | /* Takes a program previously attached to and detaches it. |
| 544 | The program may resume execution (some targets do, some don't) and will |
| 545 | no longer stop on signals, etc. We better not have left any breakpoints |
| 546 | in the program or it'll die when it hits one. ARGS is arguments |
| 547 | typed by the user (e.g. a signal to send the process). FROM_TTY |
| 548 | says whether to be verbose or not. */ |
| 549 | |
| 550 | extern void target_detach (char *, int); |
| 551 | |
| 552 | /* Detaches from a process on the target side, if not already dettached. |
| 553 | (If already detached, takes no action.) |
| 554 | |
| 555 | This operation can be used to follow the parent process of a fork. |
| 556 | On some targets, such child processes of an original inferior process |
| 557 | are automatically under debugger control, and thus do require an actual |
| 558 | detach operation. |
| 559 | |
| 560 | PID is the process id of the child to detach from. |
| 561 | ARGS is arguments typed by the user (e.g. a signal to send the process). |
| 562 | FROM_TTY says whether to be verbose or not. */ |
| 563 | |
| 564 | #define target_require_detach(pid, args, from_tty) \ |
| 565 | (*current_target.to_require_detach) (pid, args, from_tty) |
| 566 | |
| 567 | /* Resume execution of the target process PID. STEP says whether to |
| 568 | single-step or to run free; SIGGNAL is the signal to be given to |
| 569 | the target, or TARGET_SIGNAL_0 for no signal. The caller may not |
| 570 | pass TARGET_SIGNAL_DEFAULT. */ |
| 571 | |
| 572 | #define target_resume(pid, step, siggnal) \ |
| 573 | do { \ |
| 574 | dcache_invalidate(target_dcache); \ |
| 575 | (*current_target.to_resume) (pid, step, siggnal); \ |
| 576 | } while (0) |
| 577 | |
| 578 | /* Wait for process pid to do something. Pid = -1 to wait for any pid |
| 579 | to do something. Return pid of child, or -1 in case of error; |
| 580 | store status through argument pointer STATUS. Note that it is |
| 581 | *not* OK to return_to_top_level out of target_wait without popping |
| 582 | the debugging target from the stack; GDB isn't prepared to get back |
| 583 | to the prompt with a debugging target but without the frame cache, |
| 584 | stop_pc, etc., set up. */ |
| 585 | |
| 586 | #define target_wait(pid, status) \ |
| 587 | (*current_target.to_wait) (pid, status) |
| 588 | |
| 589 | /* The target_wait operation waits for a process event to occur, and |
| 590 | thereby stop the process. |
| 591 | |
| 592 | On some targets, certain events may happen in sequences. gdb's |
| 593 | correct response to any single event of such a sequence may require |
| 594 | knowledge of what earlier events in the sequence have been seen. |
| 595 | |
| 596 | This operation provides a target-specific hook that allows the |
| 597 | necessary bookkeeping to be performed to track such sequences. */ |
| 598 | |
| 599 | #define target_post_wait(pid, status) \ |
| 600 | (*current_target.to_post_wait) (pid, status) |
| 601 | |
| 602 | /* Fetch register REGNO, or all regs if regno == -1. No result. */ |
| 603 | |
| 604 | #define target_fetch_registers(regno) \ |
| 605 | (*current_target.to_fetch_registers) (regno) |
| 606 | |
| 607 | /* Store at least register REGNO, or all regs if REGNO == -1. |
| 608 | It can store as many registers as it wants to, so target_prepare_to_store |
| 609 | must have been previously called. Calls error() if there are problems. */ |
| 610 | |
| 611 | #define target_store_registers(regs) \ |
| 612 | (*current_target.to_store_registers) (regs) |
| 613 | |
| 614 | /* Get ready to modify the registers array. On machines which store |
| 615 | individual registers, this doesn't need to do anything. On machines |
| 616 | which store all the registers in one fell swoop, this makes sure |
| 617 | that REGISTERS contains all the registers from the program being |
| 618 | debugged. */ |
| 619 | |
| 620 | #define target_prepare_to_store() \ |
| 621 | (*current_target.to_prepare_to_store) () |
| 622 | |
| 623 | extern DCACHE *target_dcache; |
| 624 | |
| 625 | extern int do_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, |
| 626 | struct mem_attrib *attrib); |
| 627 | |
| 628 | extern int target_read_string (CORE_ADDR, char **, int, int *); |
| 629 | |
| 630 | extern int target_read_memory (CORE_ADDR memaddr, char *myaddr, int len); |
| 631 | |
| 632 | extern int target_write_memory (CORE_ADDR memaddr, char *myaddr, int len); |
| 633 | |
| 634 | extern int xfer_memory (CORE_ADDR, char *, int, int, |
| 635 | struct mem_attrib *, struct target_ops *); |
| 636 | |
| 637 | extern int child_xfer_memory (CORE_ADDR, char *, int, int, |
| 638 | struct mem_attrib *, struct target_ops *); |
| 639 | |
| 640 | /* Make a single attempt at transfering LEN bytes. On a successful |
| 641 | transfer, the number of bytes actually transfered is returned and |
| 642 | ERR is set to 0. When a transfer fails, -1 is returned (the number |
| 643 | of bytes actually transfered is not defined) and ERR is set to a |
| 644 | non-zero error indication. */ |
| 645 | |
| 646 | extern int |
| 647 | target_read_memory_partial (CORE_ADDR addr, char *buf, int len, int *err); |
| 648 | |
| 649 | extern int |
| 650 | target_write_memory_partial (CORE_ADDR addr, char *buf, int len, int *err); |
| 651 | |
| 652 | extern char *child_pid_to_exec_file (int); |
| 653 | |
| 654 | extern char *child_core_file_to_sym_file (char *); |
| 655 | |
| 656 | #if defined(CHILD_POST_ATTACH) |
| 657 | extern void child_post_attach (int); |
| 658 | #endif |
| 659 | |
| 660 | extern void child_post_wait (int, int); |
| 661 | |
| 662 | extern void child_post_startup_inferior (int); |
| 663 | |
| 664 | extern void child_acknowledge_created_inferior (int); |
| 665 | |
| 666 | extern void child_clone_and_follow_inferior (int, int *); |
| 667 | |
| 668 | extern void child_post_follow_inferior_by_clone (void); |
| 669 | |
| 670 | extern int child_insert_fork_catchpoint (int); |
| 671 | |
| 672 | extern int child_remove_fork_catchpoint (int); |
| 673 | |
| 674 | extern int child_insert_vfork_catchpoint (int); |
| 675 | |
| 676 | extern int child_remove_vfork_catchpoint (int); |
| 677 | |
| 678 | extern int child_has_forked (int, int *); |
| 679 | |
| 680 | extern int child_has_vforked (int, int *); |
| 681 | |
| 682 | extern void child_acknowledge_created_inferior (int); |
| 683 | |
| 684 | extern int child_can_follow_vfork_prior_to_exec (void); |
| 685 | |
| 686 | extern void child_post_follow_vfork (int, int, int, int); |
| 687 | |
| 688 | extern int child_insert_exec_catchpoint (int); |
| 689 | |
| 690 | extern int child_remove_exec_catchpoint (int); |
| 691 | |
| 692 | extern int child_has_execd (int, char **); |
| 693 | |
| 694 | extern int child_reported_exec_events_per_exec_call (void); |
| 695 | |
| 696 | extern int child_has_syscall_event (int, enum target_waitkind *, int *); |
| 697 | |
| 698 | extern int child_has_exited (int, int, int *); |
| 699 | |
| 700 | extern int child_thread_alive (int); |
| 701 | |
| 702 | /* From exec.c */ |
| 703 | |
| 704 | extern void print_section_info (struct target_ops *, bfd *); |
| 705 | |
| 706 | /* Print a line about the current target. */ |
| 707 | |
| 708 | #define target_files_info() \ |
| 709 | (*current_target.to_files_info) (¤t_target) |
| 710 | |
| 711 | /* Insert a breakpoint at address ADDR in the target machine. |
| 712 | SAVE is a pointer to memory allocated for saving the |
| 713 | target contents. It is guaranteed by the caller to be long enough |
| 714 | to save "sizeof BREAKPOINT" bytes. Result is 0 for success, or |
| 715 | an errno value. */ |
| 716 | |
| 717 | #define target_insert_breakpoint(addr, save) \ |
| 718 | (*current_target.to_insert_breakpoint) (addr, save) |
| 719 | |
| 720 | /* Remove a breakpoint at address ADDR in the target machine. |
| 721 | SAVE is a pointer to the same save area |
| 722 | that was previously passed to target_insert_breakpoint. |
| 723 | Result is 0 for success, or an errno value. */ |
| 724 | |
| 725 | #define target_remove_breakpoint(addr, save) \ |
| 726 | (*current_target.to_remove_breakpoint) (addr, save) |
| 727 | |
| 728 | /* Initialize the terminal settings we record for the inferior, |
| 729 | before we actually run the inferior. */ |
| 730 | |
| 731 | #define target_terminal_init() \ |
| 732 | (*current_target.to_terminal_init) () |
| 733 | |
| 734 | /* Put the inferior's terminal settings into effect. |
| 735 | This is preparation for starting or resuming the inferior. */ |
| 736 | |
| 737 | #define target_terminal_inferior() \ |
| 738 | (*current_target.to_terminal_inferior) () |
| 739 | |
| 740 | /* Put some of our terminal settings into effect, |
| 741 | enough to get proper results from our output, |
| 742 | but do not change into or out of RAW mode |
| 743 | so that no input is discarded. |
| 744 | |
| 745 | After doing this, either terminal_ours or terminal_inferior |
| 746 | should be called to get back to a normal state of affairs. */ |
| 747 | |
| 748 | #define target_terminal_ours_for_output() \ |
| 749 | (*current_target.to_terminal_ours_for_output) () |
| 750 | |
| 751 | /* Put our terminal settings into effect. |
| 752 | First record the inferior's terminal settings |
| 753 | so they can be restored properly later. */ |
| 754 | |
| 755 | #define target_terminal_ours() \ |
| 756 | (*current_target.to_terminal_ours) () |
| 757 | |
| 758 | /* Print useful information about our terminal status, if such a thing |
| 759 | exists. */ |
| 760 | |
| 761 | #define target_terminal_info(arg, from_tty) \ |
| 762 | (*current_target.to_terminal_info) (arg, from_tty) |
| 763 | |
| 764 | /* Kill the inferior process. Make it go away. */ |
| 765 | |
| 766 | #define target_kill() \ |
| 767 | (*current_target.to_kill) () |
| 768 | |
| 769 | /* Load an executable file into the target process. This is expected |
| 770 | to not only bring new code into the target process, but also to |
| 771 | update GDB's symbol tables to match. */ |
| 772 | |
| 773 | extern void target_load (char *arg, int from_tty); |
| 774 | |
| 775 | /* Look up a symbol in the target's symbol table. NAME is the symbol |
| 776 | name. ADDRP is a CORE_ADDR * pointing to where the value of the |
| 777 | symbol should be returned. The result is 0 if successful, nonzero |
| 778 | if the symbol does not exist in the target environment. This |
| 779 | function should not call error() if communication with the target |
| 780 | is interrupted, since it is called from symbol reading, but should |
| 781 | return nonzero, possibly doing a complain(). */ |
| 782 | |
| 783 | #define target_lookup_symbol(name, addrp) \ |
| 784 | (*current_target.to_lookup_symbol) (name, addrp) |
| 785 | |
| 786 | /* Start an inferior process and set inferior_pid to its pid. |
| 787 | EXEC_FILE is the file to run. |
| 788 | ALLARGS is a string containing the arguments to the program. |
| 789 | ENV is the environment vector to pass. Errors reported with error(). |
| 790 | On VxWorks and various standalone systems, we ignore exec_file. */ |
| 791 | |
| 792 | #define target_create_inferior(exec_file, args, env) \ |
| 793 | (*current_target.to_create_inferior) (exec_file, args, env) |
| 794 | |
| 795 | |
| 796 | /* Some targets (such as ttrace-based HPUX) don't allow us to request |
| 797 | notification of inferior events such as fork and vork immediately |
| 798 | after the inferior is created. (This because of how gdb gets an |
| 799 | inferior created via invoking a shell to do it. In such a scenario, |
| 800 | if the shell init file has commands in it, the shell will fork and |
| 801 | exec for each of those commands, and we will see each such fork |
| 802 | event. Very bad.) |
| 803 | |
| 804 | Such targets will supply an appropriate definition for this function. */ |
| 805 | |
| 806 | #define target_post_startup_inferior(pid) \ |
| 807 | (*current_target.to_post_startup_inferior) (pid) |
| 808 | |
| 809 | /* On some targets, the sequence of starting up an inferior requires |
| 810 | some synchronization between gdb and the new inferior process, PID. */ |
| 811 | |
| 812 | #define target_acknowledge_created_inferior(pid) \ |
| 813 | (*current_target.to_acknowledge_created_inferior) (pid) |
| 814 | |
| 815 | /* An inferior process has been created via a fork() or similar |
| 816 | system call. This function will clone the debugger, then ensure |
| 817 | that CHILD_PID is attached to by that debugger. |
| 818 | |
| 819 | FOLLOWED_CHILD is set TRUE on return *for the clone debugger only*, |
| 820 | and FALSE otherwise. (The original and clone debuggers can use this |
| 821 | to determine which they are, if need be.) |
| 822 | |
| 823 | (This is not a terribly useful feature without a GUI to prevent |
| 824 | the two debuggers from competing for shell input.) */ |
| 825 | |
| 826 | #define target_clone_and_follow_inferior(child_pid,followed_child) \ |
| 827 | (*current_target.to_clone_and_follow_inferior) (child_pid, followed_child) |
| 828 | |
| 829 | /* This operation is intended to be used as the last in a sequence of |
| 830 | steps taken when following both parent and child of a fork. This |
| 831 | is used by a clone of the debugger, which will follow the child. |
| 832 | |
| 833 | The original debugger has detached from this process, and the |
| 834 | clone has attached to it. |
| 835 | |
| 836 | On some targets, this requires a bit of cleanup to make it work |
| 837 | correctly. */ |
| 838 | |
| 839 | #define target_post_follow_inferior_by_clone() \ |
| 840 | (*current_target.to_post_follow_inferior_by_clone) () |
| 841 | |
| 842 | /* On some targets, we can catch an inferior fork or vfork event when |
| 843 | it occurs. These functions insert/remove an already-created |
| 844 | catchpoint for such events. */ |
| 845 | |
| 846 | #define target_insert_fork_catchpoint(pid) \ |
| 847 | (*current_target.to_insert_fork_catchpoint) (pid) |
| 848 | |
| 849 | #define target_remove_fork_catchpoint(pid) \ |
| 850 | (*current_target.to_remove_fork_catchpoint) (pid) |
| 851 | |
| 852 | #define target_insert_vfork_catchpoint(pid) \ |
| 853 | (*current_target.to_insert_vfork_catchpoint) (pid) |
| 854 | |
| 855 | #define target_remove_vfork_catchpoint(pid) \ |
| 856 | (*current_target.to_remove_vfork_catchpoint) (pid) |
| 857 | |
| 858 | /* Returns TRUE if PID has invoked the fork() system call. And, |
| 859 | also sets CHILD_PID to the process id of the other ("child") |
| 860 | inferior process that was created by that call. */ |
| 861 | |
| 862 | #define target_has_forked(pid,child_pid) \ |
| 863 | (*current_target.to_has_forked) (pid,child_pid) |
| 864 | |
| 865 | /* Returns TRUE if PID has invoked the vfork() system call. And, |
| 866 | also sets CHILD_PID to the process id of the other ("child") |
| 867 | inferior process that was created by that call. */ |
| 868 | |
| 869 | #define target_has_vforked(pid,child_pid) \ |
| 870 | (*current_target.to_has_vforked) (pid,child_pid) |
| 871 | |
| 872 | /* Some platforms (such as pre-10.20 HP-UX) don't allow us to do |
| 873 | anything to a vforked child before it subsequently calls exec(). |
| 874 | On such platforms, we say that the debugger cannot "follow" the |
| 875 | child until it has vforked. |
| 876 | |
| 877 | This function should be defined to return 1 by those targets |
| 878 | which can allow the debugger to immediately follow a vforked |
| 879 | child, and 0 if they cannot. */ |
| 880 | |
| 881 | #define target_can_follow_vfork_prior_to_exec() \ |
| 882 | (*current_target.to_can_follow_vfork_prior_to_exec) () |
| 883 | |
| 884 | /* An inferior process has been created via a vfork() system call. |
| 885 | The debugger has followed the parent, the child, or both. The |
| 886 | process of setting up for that follow may have required some |
| 887 | target-specific trickery to track the sequence of reported events. |
| 888 | If so, this function should be defined by those targets that |
| 889 | require the debugger to perform cleanup or initialization after |
| 890 | the vfork follow. */ |
| 891 | |
| 892 | #define target_post_follow_vfork(parent_pid,followed_parent,child_pid,followed_child) \ |
| 893 | (*current_target.to_post_follow_vfork) (parent_pid,followed_parent,child_pid,followed_child) |
| 894 | |
| 895 | /* On some targets, we can catch an inferior exec event when it |
| 896 | occurs. These functions insert/remove an already-created |
| 897 | catchpoint for such events. */ |
| 898 | |
| 899 | #define target_insert_exec_catchpoint(pid) \ |
| 900 | (*current_target.to_insert_exec_catchpoint) (pid) |
| 901 | |
| 902 | #define target_remove_exec_catchpoint(pid) \ |
| 903 | (*current_target.to_remove_exec_catchpoint) (pid) |
| 904 | |
| 905 | /* Returns TRUE if PID has invoked a flavor of the exec() system call. |
| 906 | And, also sets EXECD_PATHNAME to the pathname of the executable |
| 907 | file that was passed to exec(), and is now being executed. */ |
| 908 | |
| 909 | #define target_has_execd(pid,execd_pathname) \ |
| 910 | (*current_target.to_has_execd) (pid,execd_pathname) |
| 911 | |
| 912 | /* Returns the number of exec events that are reported when a process |
| 913 | invokes a flavor of the exec() system call on this target, if exec |
| 914 | events are being reported. */ |
| 915 | |
| 916 | #define target_reported_exec_events_per_exec_call() \ |
| 917 | (*current_target.to_reported_exec_events_per_exec_call) () |
| 918 | |
| 919 | /* Returns TRUE if PID has reported a syscall event. And, also sets |
| 920 | KIND to the appropriate TARGET_WAITKIND_, and sets SYSCALL_ID to |
| 921 | the unique integer ID of the syscall. */ |
| 922 | |
| 923 | #define target_has_syscall_event(pid,kind,syscall_id) \ |
| 924 | (*current_target.to_has_syscall_event) (pid,kind,syscall_id) |
| 925 | |
| 926 | /* Returns TRUE if PID has exited. And, also sets EXIT_STATUS to the |
| 927 | exit code of PID, if any. */ |
| 928 | |
| 929 | #define target_has_exited(pid,wait_status,exit_status) \ |
| 930 | (*current_target.to_has_exited) (pid,wait_status,exit_status) |
| 931 | |
| 932 | /* The debugger has completed a blocking wait() call. There is now |
| 933 | some process event that must be processed. This function should |
| 934 | be defined by those targets that require the debugger to perform |
| 935 | cleanup or internal state changes in response to the process event. */ |
| 936 | |
| 937 | /* The inferior process has died. Do what is right. */ |
| 938 | |
| 939 | #define target_mourn_inferior() \ |
| 940 | (*current_target.to_mourn_inferior) () |
| 941 | |
| 942 | /* Does target have enough data to do a run or attach command? */ |
| 943 | |
| 944 | #define target_can_run(t) \ |
| 945 | ((t)->to_can_run) () |
| 946 | |
| 947 | /* post process changes to signal handling in the inferior. */ |
| 948 | |
| 949 | #define target_notice_signals(pid) \ |
| 950 | (*current_target.to_notice_signals) (pid) |
| 951 | |
| 952 | /* Check to see if a thread is still alive. */ |
| 953 | |
| 954 | #define target_thread_alive(pid) \ |
| 955 | (*current_target.to_thread_alive) (pid) |
| 956 | |
| 957 | /* Query for new threads and add them to the thread list. */ |
| 958 | |
| 959 | #define target_find_new_threads() \ |
| 960 | (*current_target.to_find_new_threads) (); \ |
| 961 | |
| 962 | /* Make target stop in a continuable fashion. (For instance, under |
| 963 | Unix, this should act like SIGSTOP). This function is normally |
| 964 | used by GUIs to implement a stop button. */ |
| 965 | |
| 966 | #define target_stop current_target.to_stop |
| 967 | |
| 968 | /* Queries the target side for some information. The first argument is a |
| 969 | letter specifying the type of the query, which is used to determine who |
| 970 | should process it. The second argument is a string that specifies which |
| 971 | information is desired and the third is a buffer that carries back the |
| 972 | response from the target side. The fourth parameter is the size of the |
| 973 | output buffer supplied. */ |
| 974 | |
| 975 | #define target_query(query_type, query, resp_buffer, bufffer_size) \ |
| 976 | (*current_target.to_query) (query_type, query, resp_buffer, bufffer_size) |
| 977 | |
| 978 | /* Send the specified COMMAND to the target's monitor |
| 979 | (shell,interpreter) for execution. The result of the query is |
| 980 | placed in OUTBUF. */ |
| 981 | |
| 982 | #define target_rcmd(command, outbuf) \ |
| 983 | (*current_target.to_rcmd) (command, outbuf) |
| 984 | |
| 985 | |
| 986 | /* Get the symbol information for a breakpointable routine called when |
| 987 | an exception event occurs. |
| 988 | Intended mainly for C++, and for those |
| 989 | platforms/implementations where such a callback mechanism is available, |
| 990 | e.g. HP-UX with ANSI C++ (aCC). Some compilers (e.g. g++) support |
| 991 | different mechanisms for debugging exceptions. */ |
| 992 | |
| 993 | #define target_enable_exception_callback(kind, enable) \ |
| 994 | (*current_target.to_enable_exception_callback) (kind, enable) |
| 995 | |
| 996 | /* Get the current exception event kind -- throw or catch, etc. */ |
| 997 | |
| 998 | #define target_get_current_exception_event() \ |
| 999 | (*current_target.to_get_current_exception_event) () |
| 1000 | |
| 1001 | /* Pointer to next target in the chain, e.g. a core file and an exec file. */ |
| 1002 | |
| 1003 | #define target_next \ |
| 1004 | (current_target.to_next) |
| 1005 | |
| 1006 | /* Does the target include all of memory, or only part of it? This |
| 1007 | determines whether we look up the target chain for other parts of |
| 1008 | memory if this target can't satisfy a request. */ |
| 1009 | |
| 1010 | #define target_has_all_memory \ |
| 1011 | (current_target.to_has_all_memory) |
| 1012 | |
| 1013 | /* Does the target include memory? (Dummy targets don't.) */ |
| 1014 | |
| 1015 | #define target_has_memory \ |
| 1016 | (current_target.to_has_memory) |
| 1017 | |
| 1018 | /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until |
| 1019 | we start a process.) */ |
| 1020 | |
| 1021 | #define target_has_stack \ |
| 1022 | (current_target.to_has_stack) |
| 1023 | |
| 1024 | /* Does the target have registers? (Exec files don't.) */ |
| 1025 | |
| 1026 | #define target_has_registers \ |
| 1027 | (current_target.to_has_registers) |
| 1028 | |
| 1029 | /* Does the target have execution? Can we make it jump (through |
| 1030 | hoops), or pop its stack a few times? FIXME: If this is to work that |
| 1031 | way, it needs to check whether an inferior actually exists. |
| 1032 | remote-udi.c and probably other targets can be the current target |
| 1033 | when the inferior doesn't actually exist at the moment. Right now |
| 1034 | this just tells us whether this target is *capable* of execution. */ |
| 1035 | |
| 1036 | #define target_has_execution \ |
| 1037 | (current_target.to_has_execution) |
| 1038 | |
| 1039 | /* Can the target support the debugger control of thread execution? |
| 1040 | a) Can it lock the thread scheduler? |
| 1041 | b) Can it switch the currently running thread? */ |
| 1042 | |
| 1043 | #define target_can_lock_scheduler \ |
| 1044 | (current_target.to_has_thread_control & tc_schedlock) |
| 1045 | |
| 1046 | #define target_can_switch_threads \ |
| 1047 | (current_target.to_has_thread_control & tc_switch) |
| 1048 | |
| 1049 | /* Can the target support asynchronous execution? */ |
| 1050 | #define target_can_async_p() (current_target.to_can_async_p ()) |
| 1051 | |
| 1052 | /* Is the target in asynchronous execution mode? */ |
| 1053 | #define target_is_async_p() (current_target.to_is_async_p()) |
| 1054 | |
| 1055 | /* Put the target in async mode with the specified callback function. */ |
| 1056 | #define target_async(CALLBACK,CONTEXT) \ |
| 1057 | (current_target.to_async((CALLBACK), (CONTEXT))) |
| 1058 | |
| 1059 | /* This is to be used ONLY within run_stack_dummy(). It |
| 1060 | provides a workaround, to have inferior function calls done in |
| 1061 | sychronous mode, even though the target is asynchronous. After |
| 1062 | target_async_mask(0) is called, calls to target_can_async_p() will |
| 1063 | return FALSE , so that target_resume() will not try to start the |
| 1064 | target asynchronously. After the inferior stops, we IMMEDIATELY |
| 1065 | restore the previous nature of the target, by calling |
| 1066 | target_async_mask(1). After that, target_can_async_p() will return |
| 1067 | TRUE. ANY OTHER USE OF THIS FEATURE IS DEPRECATED. |
| 1068 | |
| 1069 | FIXME ezannoni 1999-12-13: we won't need this once we move |
| 1070 | the turning async on and off to the single execution commands, |
| 1071 | from where it is done currently, in remote_resume(). */ |
| 1072 | |
| 1073 | #define target_async_mask_value \ |
| 1074 | (current_target.to_async_mask_value) |
| 1075 | |
| 1076 | extern int target_async_mask (int mask); |
| 1077 | |
| 1078 | extern void target_link (char *, CORE_ADDR *); |
| 1079 | |
| 1080 | /* Converts a process id to a string. Usually, the string just contains |
| 1081 | `process xyz', but on some systems it may contain |
| 1082 | `process xyz thread abc'. */ |
| 1083 | |
| 1084 | #undef target_pid_to_str |
| 1085 | #define target_pid_to_str(PID) current_target.to_pid_to_str (PID) |
| 1086 | |
| 1087 | #ifndef target_tid_to_str |
| 1088 | #define target_tid_to_str(PID) \ |
| 1089 | target_pid_to_str (PID) |
| 1090 | extern char *normal_pid_to_str (int pid); |
| 1091 | #endif |
| 1092 | |
| 1093 | /* Return a short string describing extra information about PID, |
| 1094 | e.g. "sleeping", "runnable", "running on LWP 3". Null return value |
| 1095 | is okay. */ |
| 1096 | |
| 1097 | #define target_extra_thread_info(TP) \ |
| 1098 | (current_target.to_extra_thread_info (TP)) |
| 1099 | |
| 1100 | /* |
| 1101 | * New Objfile Event Hook: |
| 1102 | * |
| 1103 | * Sometimes a GDB component wants to get notified whenever a new |
| 1104 | * objfile is loaded. Mainly this is used by thread-debugging |
| 1105 | * implementations that need to know when symbols for the target |
| 1106 | * thread implemenation are available. |
| 1107 | * |
| 1108 | * The old way of doing this is to define a macro 'target_new_objfile' |
| 1109 | * that points to the function that you want to be called on every |
| 1110 | * objfile/shlib load. |
| 1111 | * |
| 1112 | * The new way is to grab the function pointer, 'target_new_objfile_hook', |
| 1113 | * and point it to the function that you want to be called on every |
| 1114 | * objfile/shlib load. |
| 1115 | * |
| 1116 | * If multiple clients are willing to be cooperative, they can each |
| 1117 | * save a pointer to the previous value of target_new_objfile_hook |
| 1118 | * before modifying it, and arrange for their function to call the |
| 1119 | * previous function in the chain. In that way, multiple clients |
| 1120 | * can receive this notification (something like with signal handlers). |
| 1121 | */ |
| 1122 | |
| 1123 | extern void (*target_new_objfile_hook) (struct objfile *); |
| 1124 | |
| 1125 | #ifndef target_pid_or_tid_to_str |
| 1126 | #define target_pid_or_tid_to_str(ID) \ |
| 1127 | target_pid_to_str (ID) |
| 1128 | #endif |
| 1129 | |
| 1130 | /* Attempts to find the pathname of the executable file |
| 1131 | that was run to create a specified process. |
| 1132 | |
| 1133 | The process PID must be stopped when this operation is used. |
| 1134 | |
| 1135 | If the executable file cannot be determined, NULL is returned. |
| 1136 | |
| 1137 | Else, a pointer to a character string containing the pathname |
| 1138 | is returned. This string should be copied into a buffer by |
| 1139 | the client if the string will not be immediately used, or if |
| 1140 | it must persist. */ |
| 1141 | |
| 1142 | #define target_pid_to_exec_file(pid) \ |
| 1143 | (current_target.to_pid_to_exec_file) (pid) |
| 1144 | |
| 1145 | /* Hook to call target-dependent code after reading in a new symbol table. */ |
| 1146 | |
| 1147 | #ifndef TARGET_SYMFILE_POSTREAD |
| 1148 | #define TARGET_SYMFILE_POSTREAD(OBJFILE) |
| 1149 | #endif |
| 1150 | |
| 1151 | /* Hook to call target dependent code just after inferior target process has |
| 1152 | started. */ |
| 1153 | |
| 1154 | #ifndef TARGET_CREATE_INFERIOR_HOOK |
| 1155 | #define TARGET_CREATE_INFERIOR_HOOK(PID) |
| 1156 | #endif |
| 1157 | |
| 1158 | /* Hardware watchpoint interfaces. */ |
| 1159 | |
| 1160 | /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or |
| 1161 | write). */ |
| 1162 | |
| 1163 | #ifndef STOPPED_BY_WATCHPOINT |
| 1164 | #define STOPPED_BY_WATCHPOINT(w) 0 |
| 1165 | #endif |
| 1166 | |
| 1167 | /* HP-UX supplies these operations, which respectively disable and enable |
| 1168 | the memory page-protections that are used to implement hardware watchpoints |
| 1169 | on that platform. See wait_for_inferior's use of these. */ |
| 1170 | |
| 1171 | #if !defined(TARGET_DISABLE_HW_WATCHPOINTS) |
| 1172 | #define TARGET_DISABLE_HW_WATCHPOINTS(pid) |
| 1173 | #endif |
| 1174 | |
| 1175 | #if !defined(TARGET_ENABLE_HW_WATCHPOINTS) |
| 1176 | #define TARGET_ENABLE_HW_WATCHPOINTS(pid) |
| 1177 | #endif |
| 1178 | |
| 1179 | /* Provide defaults for systems that don't support hardware watchpoints. */ |
| 1180 | |
| 1181 | #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS |
| 1182 | |
| 1183 | /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is |
| 1184 | one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or |
| 1185 | bp_hardware_breakpoint. CNT is the number of such watchpoints used so far |
| 1186 | (including this one?). OTHERTYPE is who knows what... */ |
| 1187 | |
| 1188 | #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(TYPE,CNT,OTHERTYPE) 0 |
| 1189 | |
| 1190 | #if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT) |
| 1191 | #define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(byte_count) \ |
| 1192 | ((LONGEST)(byte_count) <= REGISTER_SIZE) |
| 1193 | #endif |
| 1194 | |
| 1195 | /* However, some addresses may not be profitable to use hardware to watch, |
| 1196 | or may be difficult to understand when the addressed object is out of |
| 1197 | scope, and hence should be unwatched. On some targets, this may have |
| 1198 | severe performance penalties, such that we might as well use regular |
| 1199 | watchpoints, and save (possibly precious) hardware watchpoints for other |
| 1200 | locations. */ |
| 1201 | |
| 1202 | #if !defined(TARGET_RANGE_PROFITABLE_FOR_HW_WATCHPOINT) |
| 1203 | #define TARGET_RANGE_PROFITABLE_FOR_HW_WATCHPOINT(pid,start,len) 0 |
| 1204 | #endif |
| 1205 | |
| 1206 | |
| 1207 | /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes. TYPE is 0 |
| 1208 | for write, 1 for read, and 2 for read/write accesses. Returns 0 for |
| 1209 | success, non-zero for failure. */ |
| 1210 | |
| 1211 | #define target_remove_watchpoint(ADDR,LEN,TYPE) -1 |
| 1212 | #define target_insert_watchpoint(ADDR,LEN,TYPE) -1 |
| 1213 | |
| 1214 | #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */ |
| 1215 | |
| 1216 | #ifndef target_insert_hw_breakpoint |
| 1217 | #define target_remove_hw_breakpoint(ADDR,SHADOW) -1 |
| 1218 | #define target_insert_hw_breakpoint(ADDR,SHADOW) -1 |
| 1219 | #endif |
| 1220 | |
| 1221 | #ifndef target_stopped_data_address |
| 1222 | #define target_stopped_data_address() 0 |
| 1223 | #endif |
| 1224 | |
| 1225 | /* If defined, then we need to decr pc by this much after a hardware break- |
| 1226 | point. Presumably this overrides DECR_PC_AFTER_BREAK... */ |
| 1227 | |
| 1228 | #ifndef DECR_PC_AFTER_HW_BREAK |
| 1229 | #define DECR_PC_AFTER_HW_BREAK 0 |
| 1230 | #endif |
| 1231 | |
| 1232 | /* Sometimes gdb may pick up what appears to be a valid target address |
| 1233 | from a minimal symbol, but the value really means, essentially, |
| 1234 | "This is an index into a table which is populated when the inferior |
| 1235 | is run. Therefore, do not attempt to use this as a PC." */ |
| 1236 | |
| 1237 | #if !defined(PC_REQUIRES_RUN_BEFORE_USE) |
| 1238 | #define PC_REQUIRES_RUN_BEFORE_USE(pc) (0) |
| 1239 | #endif |
| 1240 | |
| 1241 | /* This will only be defined by a target that supports catching vfork events, |
| 1242 | such as HP-UX. |
| 1243 | |
| 1244 | On some targets (such as HP-UX 10.20 and earlier), resuming a newly vforked |
| 1245 | child process after it has exec'd, causes the parent process to resume as |
| 1246 | well. To prevent the parent from running spontaneously, such targets should |
| 1247 | define this to a function that prevents that from happening. */ |
| 1248 | #if !defined(ENSURE_VFORKING_PARENT_REMAINS_STOPPED) |
| 1249 | #define ENSURE_VFORKING_PARENT_REMAINS_STOPPED(PID) (0) |
| 1250 | #endif |
| 1251 | |
| 1252 | /* This will only be defined by a target that supports catching vfork events, |
| 1253 | such as HP-UX. |
| 1254 | |
| 1255 | On some targets (such as HP-UX 10.20 and earlier), a newly vforked child |
| 1256 | process must be resumed when it delivers its exec event, before the parent |
| 1257 | vfork event will be delivered to us. */ |
| 1258 | |
| 1259 | #if !defined(RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK) |
| 1260 | #define RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK() (0) |
| 1261 | #endif |
| 1262 | |
| 1263 | /* Routines for maintenance of the target structures... |
| 1264 | |
| 1265 | add_target: Add a target to the list of all possible targets. |
| 1266 | |
| 1267 | push_target: Make this target the top of the stack of currently used |
| 1268 | targets, within its particular stratum of the stack. Result |
| 1269 | is 0 if now atop the stack, nonzero if not on top (maybe |
| 1270 | should warn user). |
| 1271 | |
| 1272 | unpush_target: Remove this from the stack of currently used targets, |
| 1273 | no matter where it is on the list. Returns 0 if no |
| 1274 | change, 1 if removed from stack. |
| 1275 | |
| 1276 | pop_target: Remove the top thing on the stack of current targets. */ |
| 1277 | |
| 1278 | extern void add_target (struct target_ops *); |
| 1279 | |
| 1280 | extern int push_target (struct target_ops *); |
| 1281 | |
| 1282 | extern int unpush_target (struct target_ops *); |
| 1283 | |
| 1284 | extern void target_preopen (int); |
| 1285 | |
| 1286 | extern void pop_target (void); |
| 1287 | |
| 1288 | /* Struct section_table maps address ranges to file sections. It is |
| 1289 | mostly used with BFD files, but can be used without (e.g. for handling |
| 1290 | raw disks, or files not in formats handled by BFD). */ |
| 1291 | |
| 1292 | struct section_table |
| 1293 | { |
| 1294 | CORE_ADDR addr; /* Lowest address in section */ |
| 1295 | CORE_ADDR endaddr; /* 1+highest address in section */ |
| 1296 | |
| 1297 | sec_ptr the_bfd_section; |
| 1298 | |
| 1299 | bfd *bfd; /* BFD file pointer */ |
| 1300 | }; |
| 1301 | |
| 1302 | /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR. |
| 1303 | Returns 0 if OK, 1 on error. */ |
| 1304 | |
| 1305 | extern int |
| 1306 | build_section_table (bfd *, struct section_table **, struct section_table **); |
| 1307 | |
| 1308 | /* From mem-break.c */ |
| 1309 | |
| 1310 | extern int memory_remove_breakpoint (CORE_ADDR, char *); |
| 1311 | |
| 1312 | extern int memory_insert_breakpoint (CORE_ADDR, char *); |
| 1313 | |
| 1314 | extern int default_memory_remove_breakpoint (CORE_ADDR, char *); |
| 1315 | |
| 1316 | extern int default_memory_insert_breakpoint (CORE_ADDR, char *); |
| 1317 | |
| 1318 | extern breakpoint_from_pc_fn memory_breakpoint_from_pc; |
| 1319 | |
| 1320 | |
| 1321 | /* From target.c */ |
| 1322 | |
| 1323 | extern void initialize_targets (void); |
| 1324 | |
| 1325 | extern void noprocess (void); |
| 1326 | |
| 1327 | extern void find_default_attach (char *, int); |
| 1328 | |
| 1329 | extern void find_default_require_attach (char *, int); |
| 1330 | |
| 1331 | extern void find_default_require_detach (int, char *, int); |
| 1332 | |
| 1333 | extern void find_default_create_inferior (char *, char *, char **); |
| 1334 | |
| 1335 | extern void find_default_clone_and_follow_inferior (int, int *); |
| 1336 | |
| 1337 | extern struct target_ops *find_run_target (void); |
| 1338 | |
| 1339 | extern struct target_ops *find_core_target (void); |
| 1340 | |
| 1341 | extern struct target_ops *find_target_beneath (struct target_ops *); |
| 1342 | |
| 1343 | extern int |
| 1344 | target_resize_to_sections (struct target_ops *target, int num_added); |
| 1345 | |
| 1346 | extern void remove_target_sections (bfd *abfd); |
| 1347 | |
| 1348 | \f |
| 1349 | /* Stuff that should be shared among the various remote targets. */ |
| 1350 | |
| 1351 | /* Debugging level. 0 is off, and non-zero values mean to print some debug |
| 1352 | information (higher values, more information). */ |
| 1353 | extern int remote_debug; |
| 1354 | |
| 1355 | /* Speed in bits per second, or -1 which means don't mess with the speed. */ |
| 1356 | extern int baud_rate; |
| 1357 | /* Timeout limit for response from target. */ |
| 1358 | extern int remote_timeout; |
| 1359 | |
| 1360 | \f |
| 1361 | /* Functions for helping to write a native target. */ |
| 1362 | |
| 1363 | /* This is for native targets which use a unix/POSIX-style waitstatus. */ |
| 1364 | extern void store_waitstatus (struct target_waitstatus *, int); |
| 1365 | |
| 1366 | /* Predicate to target_signal_to_host(). Return non-zero if the enum |
| 1367 | targ_signal SIGNO has an equivalent ``host'' representation. */ |
| 1368 | /* FIXME: cagney/1999-11-22: The name below was chosen in preference |
| 1369 | to the shorter target_signal_p() because it is far less ambigious. |
| 1370 | In this context ``target_signal'' refers to GDB's internal |
| 1371 | representation of the target's set of signals while ``host signal'' |
| 1372 | refers to the target operating system's signal. Confused? */ |
| 1373 | |
| 1374 | extern int target_signal_to_host_p (enum target_signal signo); |
| 1375 | |
| 1376 | /* Convert between host signal numbers and enum target_signal's. |
| 1377 | target_signal_to_host() returns 0 and prints a warning() on GDB's |
| 1378 | console if SIGNO has no equivalent host representation. */ |
| 1379 | /* FIXME: cagney/1999-11-22: Here ``host'' is used incorrectly, it is |
| 1380 | refering to the target operating system's signal numbering. |
| 1381 | Similarly, ``enum target_signal'' is named incorrectly, ``enum |
| 1382 | gdb_signal'' would probably be better as it is refering to GDB's |
| 1383 | internal representation of a target operating system's signal. */ |
| 1384 | |
| 1385 | extern enum target_signal target_signal_from_host (int); |
| 1386 | extern int target_signal_to_host (enum target_signal); |
| 1387 | |
| 1388 | /* Convert from a number used in a GDB command to an enum target_signal. */ |
| 1389 | extern enum target_signal target_signal_from_command (int); |
| 1390 | |
| 1391 | /* Any target can call this to switch to remote protocol (in remote.c). */ |
| 1392 | extern void push_remote_target (char *name, int from_tty); |
| 1393 | \f |
| 1394 | /* Imported from machine dependent code */ |
| 1395 | |
| 1396 | #ifndef SOFTWARE_SINGLE_STEP_P |
| 1397 | #define SOFTWARE_SINGLE_STEP_P 0 |
| 1398 | #define SOFTWARE_SINGLE_STEP(sig,bp_p) \ |
| 1399 | (internal_error ("SOFTWARE_SINGLE_STEP"), 0) |
| 1400 | #endif /* SOFTWARE_SINGLE_STEP_P */ |
| 1401 | |
| 1402 | /* Blank target vector entries are initialized to target_ignore. */ |
| 1403 | void target_ignore (void); |
| 1404 | |
| 1405 | /* Macro for getting target's idea of a frame pointer. |
| 1406 | FIXME: GDB's whole scheme for dealing with "frames" and |
| 1407 | "frame pointers" needs a serious shakedown. */ |
| 1408 | #ifndef TARGET_VIRTUAL_FRAME_POINTER |
| 1409 | #define TARGET_VIRTUAL_FRAME_POINTER(ADDR, REGP, OFFP) \ |
| 1410 | do { *(REGP) = FP_REGNUM; *(OFFP) = 0; } while (0) |
| 1411 | #endif /* TARGET_VIRTUAL_FRAME_POINTER */ |
| 1412 | |
| 1413 | #endif /* !defined (TARGET_H) */ |