1 /* Interface between GDB and target environments, including files and processes 2 3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 5 Free Software Foundation, Inc. 6 7 Contributed by Cygnus Support. Written by John Gilmore. 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 #if !defined (TARGET_H) 25 #define TARGET_H 26 27 struct objfile; 28 struct ui_file; 29 struct mem_attrib; 30 struct target_ops; 31 struct bp_target_info; 32 struct regcache; 33 struct target_section_table; 34 35 /* This include file defines the interface between the main part 36 of the debugger, and the part which is target-specific, or 37 specific to the communications interface between us and the 38 target. 39 40 A TARGET is an interface between the debugger and a particular 41 kind of file or process. Targets can be STACKED in STRATA, 42 so that more than one target can potentially respond to a request. 43 In particular, memory accesses will walk down the stack of targets 44 until they find a target that is interested in handling that particular 45 address. STRATA are artificial boundaries on the stack, within 46 which particular kinds of targets live. Strata exist so that 47 people don't get confused by pushing e.g. a process target and then 48 a file target, and wondering why they can't see the current values 49 of variables any more (the file target is handling them and they 50 never get to the process target). So when you push a file target, 51 it goes into the file stratum, which is always below the process 52 stratum. */ 53 54 #include "bfd.h" 55 #include "symtab.h" 56 #include "memattr.h" 57 #include "vec.h" 58 #include "gdb_signals.h" 59 60 enum strata 61 { 62 dummy_stratum, /* The lowest of the low */ 63 file_stratum, /* Executable files, etc */ 64 core_stratum, /* Core dump files */ 65 process_stratum, /* Executing processes */ 66 thread_stratum, /* Executing threads */ 67 record_stratum, /* Support record debugging */ 68 arch_stratum /* Architecture overrides */ 69 }; 70 71 enum thread_control_capabilities 72 { 73 tc_none = 0, /* Default: can't control thread execution. */ 74 tc_schedlock = 1, /* Can lock the thread scheduler. */ 75 }; 76 77 /* Stuff for target_wait. */ 78 79 /* Generally, what has the program done? */ 80 enum target_waitkind 81 { 82 /* The program has exited. The exit status is in value.integer. */ 83 TARGET_WAITKIND_EXITED, 84 85 /* The program has stopped with a signal. Which signal is in 86 value.sig. */ 87 TARGET_WAITKIND_STOPPED, 88 89 /* The program has terminated with a signal. Which signal is in 90 value.sig. */ 91 TARGET_WAITKIND_SIGNALLED, 92 93 /* The program is letting us know that it dynamically loaded something 94 (e.g. it called load(2) on AIX). */ 95 TARGET_WAITKIND_LOADED, 96 97 /* The program has forked. A "related" process' PTID is in 98 value.related_pid. I.e., if the child forks, value.related_pid 99 is the parent's ID. */ 100 101 TARGET_WAITKIND_FORKED, 102 103 /* The program has vforked. A "related" process's PTID is in 104 value.related_pid. */ 105 106 TARGET_WAITKIND_VFORKED, 107 108 /* The program has exec'ed a new executable file. The new file's 109 pathname is pointed to by value.execd_pathname. */ 110 111 TARGET_WAITKIND_EXECD, 112 113 /* The program has entered or returned from a system call. On 114 HP-UX, this is used in the hardware watchpoint implementation. 115 The syscall's unique integer ID number is in value.syscall_id */ 116 117 TARGET_WAITKIND_SYSCALL_ENTRY, 118 TARGET_WAITKIND_SYSCALL_RETURN, 119 120 /* Nothing happened, but we stopped anyway. This perhaps should be handled 121 within target_wait, but I'm not sure target_wait should be resuming the 122 inferior. */ 123 TARGET_WAITKIND_SPURIOUS, 124 125 /* An event has occured, but we should wait again. 126 Remote_async_wait() returns this when there is an event 127 on the inferior, but the rest of the world is not interested in 128 it. The inferior has not stopped, but has just sent some output 129 to the console, for instance. In this case, we want to go back 130 to the event loop and wait there for another event from the 131 inferior, rather than being stuck in the remote_async_wait() 132 function. This way the event loop is responsive to other events, 133 like for instance the user typing. */ 134 TARGET_WAITKIND_IGNORE, 135 136 /* The target has run out of history information, 137 and cannot run backward any further. */ 138 TARGET_WAITKIND_NO_HISTORY 139 }; 140 141 struct target_waitstatus 142 { 143 enum target_waitkind kind; 144 145 /* Forked child pid, execd pathname, exit status, signal number or 146 syscall number. */ 147 union 148 { 149 int integer; 150 enum target_signal sig; 151 ptid_t related_pid; 152 char *execd_pathname; 153 int syscall_number; 154 } 155 value; 156 }; 157 158 /* Options that can be passed to target_wait. */ 159 160 /* Return immediately if there's no event already queued. If this 161 options is not requested, target_wait blocks waiting for an 162 event. */ 163 #define TARGET_WNOHANG 1 164 165 /* The structure below stores information about a system call. 166 It is basically used in the "catch syscall" command, and in 167 every function that gives information about a system call. 168 169 It's also good to mention that its fields represent everything 170 that we currently know about a syscall in GDB. */ 171 struct syscall 172 { 173 /* The syscall number. */ 174 int number; 175 176 /* The syscall name. */ 177 const char *name; 178 }; 179 180 /* Return a pretty printed form of target_waitstatus. 181 Space for the result is malloc'd, caller must free. */ 182 extern char *target_waitstatus_to_string (const struct target_waitstatus *); 183 184 /* Possible types of events that the inferior handler will have to 185 deal with. */ 186 enum inferior_event_type 187 { 188 /* There is a request to quit the inferior, abandon it. */ 189 INF_QUIT_REQ, 190 /* Process a normal inferior event which will result in target_wait 191 being called. */ 192 INF_REG_EVENT, 193 /* Deal with an error on the inferior. */ 194 INF_ERROR, 195 /* We are called because a timer went off. */ 196 INF_TIMER, 197 /* We are called to do stuff after the inferior stops. */ 198 INF_EXEC_COMPLETE, 199 /* We are called to do some stuff after the inferior stops, but we 200 are expected to reenter the proceed() and 201 handle_inferior_event() functions. This is used only in case of 202 'step n' like commands. */ 203 INF_EXEC_CONTINUE 204 }; 205 206 /* Target objects which can be transfered using target_read, 207 target_write, et cetera. */ 208 209 enum target_object 210 { 211 /* AVR target specific transfer. See "avr-tdep.c" and "remote.c". */ 212 TARGET_OBJECT_AVR, 213 /* SPU target specific transfer. See "spu-tdep.c". */ 214 TARGET_OBJECT_SPU, 215 /* Transfer up-to LEN bytes of memory starting at OFFSET. */ 216 TARGET_OBJECT_MEMORY, 217 /* Memory, avoiding GDB's data cache and trusting the executable. 218 Target implementations of to_xfer_partial never need to handle 219 this object, and most callers should not use it. */ 220 TARGET_OBJECT_RAW_MEMORY, 221 /* Memory known to be part of the target's stack. This is cached even 222 if it is not in a region marked as such, since it is known to be 223 "normal" RAM. */ 224 TARGET_OBJECT_STACK_MEMORY, 225 /* Kernel Unwind Table. See "ia64-tdep.c". */ 226 TARGET_OBJECT_UNWIND_TABLE, 227 /* Transfer auxilliary vector. */ 228 TARGET_OBJECT_AUXV, 229 /* StackGhost cookie. See "sparc-tdep.c". */ 230 TARGET_OBJECT_WCOOKIE, 231 /* Target memory map in XML format. */ 232 TARGET_OBJECT_MEMORY_MAP, 233 /* Flash memory. This object can be used to write contents to 234 a previously erased flash memory. Using it without erasing 235 flash can have unexpected results. Addresses are physical 236 address on target, and not relative to flash start. */ 237 TARGET_OBJECT_FLASH, 238 /* Available target-specific features, e.g. registers and coprocessors. 239 See "target-descriptions.c". ANNEX should never be empty. */ 240 TARGET_OBJECT_AVAILABLE_FEATURES, 241 /* Currently loaded libraries, in XML format. */ 242 TARGET_OBJECT_LIBRARIES, 243 /* Get OS specific data. The ANNEX specifies the type (running 244 processes, etc.). */ 245 TARGET_OBJECT_OSDATA, 246 /* Extra signal info. Usually the contents of `siginfo_t' on unix 247 platforms. */ 248 TARGET_OBJECT_SIGNAL_INFO, 249 /* Possible future objects: TARGET_OBJECT_FILE, ... */ 250 }; 251 252 /* Request that OPS transfer up to LEN 8-bit bytes of the target's 253 OBJECT. The OFFSET, for a seekable object, specifies the 254 starting point. The ANNEX can be used to provide additional 255 data-specific information to the target. 256 257 Return the number of bytes actually transfered, or -1 if the 258 transfer is not supported or otherwise fails. Return of a positive 259 value less than LEN indicates that no further transfer is possible. 260 Unlike the raw to_xfer_partial interface, callers of these 261 functions do not need to retry partial transfers. */ 262 263 extern LONGEST target_read (struct target_ops *ops, 264 enum target_object object, 265 const char *annex, gdb_byte *buf, 266 ULONGEST offset, LONGEST len); 267 268 extern LONGEST target_read_until_error (struct target_ops *ops, 269 enum target_object object, 270 const char *annex, gdb_byte *buf, 271 ULONGEST offset, LONGEST len); 272 273 extern LONGEST target_write (struct target_ops *ops, 274 enum target_object object, 275 const char *annex, const gdb_byte *buf, 276 ULONGEST offset, LONGEST len); 277 278 /* Similar to target_write, except that it also calls PROGRESS with 279 the number of bytes written and the opaque BATON after every 280 successful partial write (and before the first write). This is 281 useful for progress reporting and user interaction while writing 282 data. To abort the transfer, the progress callback can throw an 283 exception. */ 284 285 LONGEST target_write_with_progress (struct target_ops *ops, 286 enum target_object object, 287 const char *annex, const gdb_byte *buf, 288 ULONGEST offset, LONGEST len, 289 void (*progress) (ULONGEST, void *), 290 void *baton); 291 292 /* Wrapper to perform a full read of unknown size. OBJECT/ANNEX will 293 be read using OPS. The return value will be -1 if the transfer 294 fails or is not supported; 0 if the object is empty; or the length 295 of the object otherwise. If a positive value is returned, a 296 sufficiently large buffer will be allocated using xmalloc and 297 returned in *BUF_P containing the contents of the object. 298 299 This method should be used for objects sufficiently small to store 300 in a single xmalloc'd buffer, when no fixed bound on the object's 301 size is known in advance. Don't try to read TARGET_OBJECT_MEMORY 302 through this function. */ 303 304 extern LONGEST target_read_alloc (struct target_ops *ops, 305 enum target_object object, 306 const char *annex, gdb_byte **buf_p); 307 308 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and 309 returned as a string, allocated using xmalloc. If an error occurs 310 or the transfer is unsupported, NULL is returned. Empty objects 311 are returned as allocated but empty strings. A warning is issued 312 if the result contains any embedded NUL bytes. */ 313 314 extern char *target_read_stralloc (struct target_ops *ops, 315 enum target_object object, 316 const char *annex); 317 318 /* Wrappers to target read/write that perform memory transfers. They 319 throw an error if the memory transfer fails. 320 321 NOTE: cagney/2003-10-23: The naming schema is lifted from 322 "frame.h". The parameter order is lifted from get_frame_memory, 323 which in turn lifted it from read_memory. */ 324 325 extern void get_target_memory (struct target_ops *ops, CORE_ADDR addr, 326 gdb_byte *buf, LONGEST len); 327 extern ULONGEST get_target_memory_unsigned (struct target_ops *ops, 328 CORE_ADDR addr, int len, 329 enum bfd_endian byte_order); 330 331 struct thread_info; /* fwd decl for parameter list below: */ 332 333 struct target_ops 334 { 335 struct target_ops *beneath; /* To the target under this one. */ 336 char *to_shortname; /* Name this target type */ 337 char *to_longname; /* Name for printing */ 338 char *to_doc; /* Documentation. Does not include trailing 339 newline, and starts with a one-line descrip- 340 tion (probably similar to to_longname). */ 341 /* Per-target scratch pad. */ 342 void *to_data; 343 /* The open routine takes the rest of the parameters from the 344 command, and (if successful) pushes a new target onto the 345 stack. Targets should supply this routine, if only to provide 346 an error message. */ 347 void (*to_open) (char *, int); 348 /* Old targets with a static target vector provide "to_close". 349 New re-entrant targets provide "to_xclose" and that is expected 350 to xfree everything (including the "struct target_ops"). */ 351 void (*to_xclose) (struct target_ops *targ, int quitting); 352 void (*to_close) (int); 353 void (*to_attach) (struct target_ops *ops, char *, int); 354 void (*to_post_attach) (int); 355 void (*to_detach) (struct target_ops *ops, char *, int); 356 void (*to_disconnect) (struct target_ops *, char *, int); 357 void (*to_resume) (struct target_ops *, ptid_t, int, enum target_signal); 358 ptid_t (*to_wait) (struct target_ops *, 359 ptid_t, struct target_waitstatus *, int); 360 void (*to_fetch_registers) (struct target_ops *, struct regcache *, int); 361 void (*to_store_registers) (struct target_ops *, struct regcache *, int); 362 void (*to_prepare_to_store) (struct regcache *); 363 364 /* Transfer LEN bytes of memory between GDB address MYADDR and 365 target address MEMADDR. If WRITE, transfer them to the target, else 366 transfer them from the target. TARGET is the target from which we 367 get this function. 368 369 Return value, N, is one of the following: 370 371 0 means that we can't handle this. If errno has been set, it is the 372 error which prevented us from doing it (FIXME: What about bfd_error?). 373 374 positive (call it N) means that we have transferred N bytes 375 starting at MEMADDR. We might be able to handle more bytes 376 beyond this length, but no promises. 377 378 negative (call its absolute value N) means that we cannot 379 transfer right at MEMADDR, but we could transfer at least 380 something at MEMADDR + N. 381 382 NOTE: cagney/2004-10-01: This has been entirely superseeded by 383 to_xfer_partial and inferior inheritance. */ 384 385 int (*deprecated_xfer_memory) (CORE_ADDR memaddr, gdb_byte *myaddr, 386 int len, int write, 387 struct mem_attrib *attrib, 388 struct target_ops *target); 389 390 void (*to_files_info) (struct target_ops *); 391 int (*to_insert_breakpoint) (struct gdbarch *, struct bp_target_info *); 392 int (*to_remove_breakpoint) (struct gdbarch *, struct bp_target_info *); 393 int (*to_can_use_hw_breakpoint) (int, int, int); 394 int (*to_insert_hw_breakpoint) (struct gdbarch *, struct bp_target_info *); 395 int (*to_remove_hw_breakpoint) (struct gdbarch *, struct bp_target_info *); 396 int (*to_remove_watchpoint) (CORE_ADDR, int, int); 397 int (*to_insert_watchpoint) (CORE_ADDR, int, int); 398 int (*to_stopped_by_watchpoint) (void); 399 int to_have_steppable_watchpoint; 400 int to_have_continuable_watchpoint; 401 int (*to_stopped_data_address) (struct target_ops *, CORE_ADDR *); 402 int (*to_watchpoint_addr_within_range) (struct target_ops *, 403 CORE_ADDR, CORE_ADDR, int); 404 int (*to_region_ok_for_hw_watchpoint) (CORE_ADDR, int); 405 void (*to_terminal_init) (void); 406 void (*to_terminal_inferior) (void); 407 void (*to_terminal_ours_for_output) (void); 408 void (*to_terminal_ours) (void); 409 void (*to_terminal_save_ours) (void); 410 void (*to_terminal_info) (char *, int); 411 void (*to_kill) (struct target_ops *); 412 void (*to_load) (char *, int); 413 int (*to_lookup_symbol) (char *, CORE_ADDR *); 414 void (*to_create_inferior) (struct target_ops *, 415 char *, char *, char **, int); 416 void (*to_post_startup_inferior) (ptid_t); 417 void (*to_acknowledge_created_inferior) (int); 418 void (*to_insert_fork_catchpoint) (int); 419 int (*to_remove_fork_catchpoint) (int); 420 void (*to_insert_vfork_catchpoint) (int); 421 int (*to_remove_vfork_catchpoint) (int); 422 int (*to_follow_fork) (struct target_ops *, int); 423 void (*to_insert_exec_catchpoint) (int); 424 int (*to_remove_exec_catchpoint) (int); 425 int (*to_set_syscall_catchpoint) (int, int, int, int, int *); 426 int (*to_has_exited) (int, int, int *); 427 void (*to_mourn_inferior) (struct target_ops *); 428 int (*to_can_run) (void); 429 void (*to_notice_signals) (ptid_t ptid); 430 int (*to_thread_alive) (struct target_ops *, ptid_t ptid); 431 void (*to_find_new_threads) (struct target_ops *); 432 char *(*to_pid_to_str) (struct target_ops *, ptid_t); 433 char *(*to_extra_thread_info) (struct thread_info *); 434 void (*to_stop) (ptid_t); 435 void (*to_rcmd) (char *command, struct ui_file *output); 436 char *(*to_pid_to_exec_file) (int pid); 437 void (*to_log_command) (const char *); 438 struct target_section_table *(*to_get_section_table) (struct target_ops *); 439 enum strata to_stratum; 440 int (*to_has_all_memory) (struct target_ops *); 441 int (*to_has_memory) (struct target_ops *); 442 int (*to_has_stack) (struct target_ops *); 443 int (*to_has_registers) (struct target_ops *); 444 int (*to_has_execution) (struct target_ops *); 445 int to_has_thread_control; /* control thread execution */ 446 int to_attach_no_wait; 447 /* ASYNC target controls */ 448 int (*to_can_async_p) (void); 449 int (*to_is_async_p) (void); 450 void (*to_async) (void (*) (enum inferior_event_type, void *), void *); 451 int (*to_async_mask) (int); 452 int (*to_supports_non_stop) (void); 453 int (*to_find_memory_regions) (int (*) (CORE_ADDR, 454 unsigned long, 455 int, int, int, 456 void *), 457 void *); 458 char * (*to_make_corefile_notes) (bfd *, int *); 459 460 /* Return the thread-local address at OFFSET in the 461 thread-local storage for the thread PTID and the shared library 462 or executable file given by OBJFILE. If that block of 463 thread-local storage hasn't been allocated yet, this function 464 may return an error. */ 465 CORE_ADDR (*to_get_thread_local_address) (struct target_ops *ops, 466 ptid_t ptid, 467 CORE_ADDR load_module_addr, 468 CORE_ADDR offset); 469 470 /* Request that OPS transfer up to LEN 8-bit bytes of the target's 471 OBJECT. The OFFSET, for a seekable object, specifies the 472 starting point. The ANNEX can be used to provide additional 473 data-specific information to the target. 474 475 Return the number of bytes actually transfered, zero when no 476 further transfer is possible, and -1 when the transfer is not 477 supported. Return of a positive value smaller than LEN does 478 not indicate the end of the object, only the end of the 479 transfer; higher level code should continue transferring if 480 desired. This is handled in target.c. 481 482 The interface does not support a "retry" mechanism. Instead it 483 assumes that at least one byte will be transfered on each 484 successful call. 485 486 NOTE: cagney/2003-10-17: The current interface can lead to 487 fragmented transfers. Lower target levels should not implement 488 hacks, such as enlarging the transfer, in an attempt to 489 compensate for this. Instead, the target stack should be 490 extended so that it implements supply/collect methods and a 491 look-aside object cache. With that available, the lowest 492 target can safely and freely "push" data up the stack. 493 494 See target_read and target_write for more information. One, 495 and only one, of readbuf or writebuf must be non-NULL. */ 496 497 LONGEST (*to_xfer_partial) (struct target_ops *ops, 498 enum target_object object, const char *annex, 499 gdb_byte *readbuf, const gdb_byte *writebuf, 500 ULONGEST offset, LONGEST len); 501 502 /* Returns the memory map for the target. A return value of NULL 503 means that no memory map is available. If a memory address 504 does not fall within any returned regions, it's assumed to be 505 RAM. The returned memory regions should not overlap. 506 507 The order of regions does not matter; target_memory_map will 508 sort regions by starting address. For that reason, this 509 function should not be called directly except via 510 target_memory_map. 511 512 This method should not cache data; if the memory map could 513 change unexpectedly, it should be invalidated, and higher 514 layers will re-fetch it. */ 515 VEC(mem_region_s) *(*to_memory_map) (struct target_ops *); 516 517 /* Erases the region of flash memory starting at ADDRESS, of 518 length LENGTH. 519 520 Precondition: both ADDRESS and ADDRESS+LENGTH should be aligned 521 on flash block boundaries, as reported by 'to_memory_map'. */ 522 void (*to_flash_erase) (struct target_ops *, 523 ULONGEST address, LONGEST length); 524 525 /* Finishes a flash memory write sequence. After this operation 526 all flash memory should be available for writing and the result 527 of reading from areas written by 'to_flash_write' should be 528 equal to what was written. */ 529 void (*to_flash_done) (struct target_ops *); 530 531 /* Describe the architecture-specific features of this target. 532 Returns the description found, or NULL if no description 533 was available. */ 534 const struct target_desc *(*to_read_description) (struct target_ops *ops); 535 536 /* Build the PTID of the thread on which a given task is running, 537 based on LWP and THREAD. These values are extracted from the 538 task Private_Data section of the Ada Task Control Block, and 539 their interpretation depends on the target. */ 540 ptid_t (*to_get_ada_task_ptid) (long lwp, long thread); 541 542 /* Read one auxv entry from *READPTR, not reading locations >= ENDPTR. 543 Return 0 if *READPTR is already at the end of the buffer. 544 Return -1 if there is insufficient buffer for a whole entry. 545 Return 1 if an entry was read into *TYPEP and *VALP. */ 546 int (*to_auxv_parse) (struct target_ops *ops, gdb_byte **readptr, 547 gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp); 548 549 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the 550 sequence of bytes in PATTERN with length PATTERN_LEN. 551 552 The result is 1 if found, 0 if not found, and -1 if there was an error 553 requiring halting of the search (e.g. memory read error). 554 If the pattern is found the address is recorded in FOUND_ADDRP. */ 555 int (*to_search_memory) (struct target_ops *ops, 556 CORE_ADDR start_addr, ULONGEST search_space_len, 557 const gdb_byte *pattern, ULONGEST pattern_len, 558 CORE_ADDR *found_addrp); 559 560 /* Can target execute in reverse? */ 561 int (*to_can_execute_reverse) (void); 562 563 /* Does this target support debugging multiple processes 564 simultaneously? */ 565 int (*to_supports_multi_process) (void); 566 567 /* Determine current architecture of thread PTID. 568 569 The target is supposed to determine the architecture of the code where 570 the target is currently stopped at (on Cell, if a target is in spu_run, 571 to_thread_architecture would return SPU, otherwise PPC32 or PPC64). 572 This is architecture used to perform decr_pc_after_break adjustment, 573 and also determines the frame architecture of the innermost frame. 574 ptrace operations need to operate according to target_gdbarch. 575 576 The default implementation always returns target_gdbarch. */ 577 struct gdbarch *(*to_thread_architecture) (struct target_ops *, ptid_t); 578 579 int to_magic; 580 /* Need sub-structure for target machine related rather than comm related? 581 */ 582 }; 583 584 /* Magic number for checking ops size. If a struct doesn't end with this 585 number, somebody changed the declaration but didn't change all the 586 places that initialize one. */ 587 588 #define OPS_MAGIC 3840 589 590 /* The ops structure for our "current" target process. This should 591 never be NULL. If there is no target, it points to the dummy_target. */ 592 593 extern struct target_ops current_target; 594 595 /* Define easy words for doing these operations on our current target. */ 596 597 #define target_shortname (current_target.to_shortname) 598 #define target_longname (current_target.to_longname) 599 600 /* Does whatever cleanup is required for a target that we are no 601 longer going to be calling. QUITTING indicates that GDB is exiting 602 and should not get hung on an error (otherwise it is important to 603 perform clean termination, even if it takes a while). This routine 604 is automatically always called when popping the target off the 605 target stack (to_beneath is undefined). Closing file descriptors 606 and freeing all memory allocated memory are typical things it 607 should do. */ 608 609 void target_close (struct target_ops *targ, int quitting); 610 611 /* Attaches to a process on the target side. Arguments are as passed 612 to the `attach' command by the user. This routine can be called 613 when the target is not on the target-stack, if the target_can_run 614 routine returns 1; in that case, it must push itself onto the stack. 615 Upon exit, the target should be ready for normal operations, and 616 should be ready to deliver the status of the process immediately 617 (without waiting) to an upcoming target_wait call. */ 618 619 void target_attach (char *, int); 620 621 /* Some targets don't generate traps when attaching to the inferior, 622 or their target_attach implementation takes care of the waiting. 623 These targets must set to_attach_no_wait. */ 624 625 #define target_attach_no_wait \ 626 (current_target.to_attach_no_wait) 627 628 /* The target_attach operation places a process under debugger control, 629 and stops the process. 630 631 This operation provides a target-specific hook that allows the 632 necessary bookkeeping to be performed after an attach completes. */ 633 #define target_post_attach(pid) \ 634 (*current_target.to_post_attach) (pid) 635 636 /* Takes a program previously attached to and detaches it. 637 The program may resume execution (some targets do, some don't) and will 638 no longer stop on signals, etc. We better not have left any breakpoints 639 in the program or it'll die when it hits one. ARGS is arguments 640 typed by the user (e.g. a signal to send the process). FROM_TTY 641 says whether to be verbose or not. */ 642 643 extern void target_detach (char *, int); 644 645 /* Disconnect from the current target without resuming it (leaving it 646 waiting for a debugger). */ 647 648 extern void target_disconnect (char *, int); 649 650 /* Resume execution of the target process PTID. STEP says whether to 651 single-step or to run free; SIGGNAL is the signal to be given to 652 the target, or TARGET_SIGNAL_0 for no signal. The caller may not 653 pass TARGET_SIGNAL_DEFAULT. */ 654 655 extern void target_resume (ptid_t ptid, int step, enum target_signal signal); 656 657 /* Wait for process pid to do something. PTID = -1 to wait for any 658 pid to do something. Return pid of child, or -1 in case of error; 659 store status through argument pointer STATUS. Note that it is 660 _NOT_ OK to throw_exception() out of target_wait() without popping 661 the debugging target from the stack; GDB isn't prepared to get back 662 to the prompt with a debugging target but without the frame cache, 663 stop_pc, etc., set up. OPTIONS is a bitwise OR of TARGET_W* 664 options. */ 665 666 extern ptid_t target_wait (ptid_t ptid, struct target_waitstatus *status, 667 int options); 668 669 /* Fetch at least register REGNO, or all regs if regno == -1. No result. */ 670 671 extern void target_fetch_registers (struct regcache *regcache, int regno); 672 673 /* Store at least register REGNO, or all regs if REGNO == -1. 674 It can store as many registers as it wants to, so target_prepare_to_store 675 must have been previously called. Calls error() if there are problems. */ 676 677 extern void target_store_registers (struct regcache *regcache, int regs); 678 679 /* Get ready to modify the registers array. On machines which store 680 individual registers, this doesn't need to do anything. On machines 681 which store all the registers in one fell swoop, this makes sure 682 that REGISTERS contains all the registers from the program being 683 debugged. */ 684 685 #define target_prepare_to_store(regcache) \ 686 (*current_target.to_prepare_to_store) (regcache) 687 688 /* Returns true if this target can debug multiple processes 689 simultaneously. */ 690 691 #define target_supports_multi_process() \ 692 (*current_target.to_supports_multi_process) () 693 694 /* Invalidate all target dcaches. */ 695 extern void target_dcache_invalidate (void); 696 697 extern int target_read_string (CORE_ADDR, char **, int, int *); 698 699 extern int target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len); 700 701 extern int target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, int len); 702 703 extern int target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, 704 int len); 705 706 /* Fetches the target's memory map. If one is found it is sorted 707 and returned, after some consistency checking. Otherwise, NULL 708 is returned. */ 709 VEC(mem_region_s) *target_memory_map (void); 710 711 /* Erase the specified flash region. */ 712 void target_flash_erase (ULONGEST address, LONGEST length); 713 714 /* Finish a sequence of flash operations. */ 715 void target_flash_done (void); 716 717 /* Describes a request for a memory write operation. */ 718 struct memory_write_request 719 { 720 /* Begining address that must be written. */ 721 ULONGEST begin; 722 /* Past-the-end address. */ 723 ULONGEST end; 724 /* The data to write. */ 725 gdb_byte *data; 726 /* A callback baton for progress reporting for this request. */ 727 void *baton; 728 }; 729 typedef struct memory_write_request memory_write_request_s; 730 DEF_VEC_O(memory_write_request_s); 731 732 /* Enumeration specifying different flash preservation behaviour. */ 733 enum flash_preserve_mode 734 { 735 flash_preserve, 736 flash_discard 737 }; 738 739 /* Write several memory blocks at once. This version can be more 740 efficient than making several calls to target_write_memory, in 741 particular because it can optimize accesses to flash memory. 742 743 Moreover, this is currently the only memory access function in gdb 744 that supports writing to flash memory, and it should be used for 745 all cases where access to flash memory is desirable. 746 747 REQUESTS is the vector (see vec.h) of memory_write_request. 748 PRESERVE_FLASH_P indicates what to do with blocks which must be 749 erased, but not completely rewritten. 750 PROGRESS_CB is a function that will be periodically called to provide 751 feedback to user. It will be called with the baton corresponding 752 to the request currently being written. It may also be called 753 with a NULL baton, when preserved flash sectors are being rewritten. 754 755 The function returns 0 on success, and error otherwise. */ 756 int target_write_memory_blocks (VEC(memory_write_request_s) *requests, 757 enum flash_preserve_mode preserve_flash_p, 758 void (*progress_cb) (ULONGEST, void *)); 759 760 /* From infrun.c. */ 761 762 extern int inferior_has_forked (ptid_t pid, ptid_t *child_pid); 763 764 extern int inferior_has_vforked (ptid_t pid, ptid_t *child_pid); 765 766 extern int inferior_has_execd (ptid_t pid, char **execd_pathname); 767 768 extern int inferior_has_called_syscall (ptid_t pid, int *syscall_number); 769 770 /* Print a line about the current target. */ 771 772 #define target_files_info() \ 773 (*current_target.to_files_info) (¤t_target) 774 775 /* Insert a breakpoint at address BP_TGT->placed_address in the target 776 machine. Result is 0 for success, or an errno value. */ 777 778 #define target_insert_breakpoint(gdbarch, bp_tgt) \ 779 (*current_target.to_insert_breakpoint) (gdbarch, bp_tgt) 780 781 /* Remove a breakpoint at address BP_TGT->placed_address in the target 782 machine. Result is 0 for success, or an errno value. */ 783 784 #define target_remove_breakpoint(gdbarch, bp_tgt) \ 785 (*current_target.to_remove_breakpoint) (gdbarch, bp_tgt) 786 787 /* Initialize the terminal settings we record for the inferior, 788 before we actually run the inferior. */ 789 790 #define target_terminal_init() \ 791 (*current_target.to_terminal_init) () 792 793 /* Put the inferior's terminal settings into effect. 794 This is preparation for starting or resuming the inferior. */ 795 796 extern void target_terminal_inferior (void); 797 798 /* Put some of our terminal settings into effect, 799 enough to get proper results from our output, 800 but do not change into or out of RAW mode 801 so that no input is discarded. 802 803 After doing this, either terminal_ours or terminal_inferior 804 should be called to get back to a normal state of affairs. */ 805 806 #define target_terminal_ours_for_output() \ 807 (*current_target.to_terminal_ours_for_output) () 808 809 /* Put our terminal settings into effect. 810 First record the inferior's terminal settings 811 so they can be restored properly later. */ 812 813 #define target_terminal_ours() \ 814 (*current_target.to_terminal_ours) () 815 816 /* Save our terminal settings. 817 This is called from TUI after entering or leaving the curses 818 mode. Since curses modifies our terminal this call is here 819 to take this change into account. */ 820 821 #define target_terminal_save_ours() \ 822 (*current_target.to_terminal_save_ours) () 823 824 /* Print useful information about our terminal status, if such a thing 825 exists. */ 826 827 #define target_terminal_info(arg, from_tty) \ 828 (*current_target.to_terminal_info) (arg, from_tty) 829 830 /* Kill the inferior process. Make it go away. */ 831 832 extern void target_kill (void); 833 834 /* Load an executable file into the target process. This is expected 835 to not only bring new code into the target process, but also to 836 update GDB's symbol tables to match. 837 838 ARG contains command-line arguments, to be broken down with 839 buildargv (). The first non-switch argument is the filename to 840 load, FILE; the second is a number (as parsed by strtoul (..., ..., 841 0)), which is an offset to apply to the load addresses of FILE's 842 sections. The target may define switches, or other non-switch 843 arguments, as it pleases. */ 844 845 extern void target_load (char *arg, int from_tty); 846 847 /* Look up a symbol in the target's symbol table. NAME is the symbol 848 name. ADDRP is a CORE_ADDR * pointing to where the value of the 849 symbol should be returned. The result is 0 if successful, nonzero 850 if the symbol does not exist in the target environment. This 851 function should not call error() if communication with the target 852 is interrupted, since it is called from symbol reading, but should 853 return nonzero, possibly doing a complain(). */ 854 855 #define target_lookup_symbol(name, addrp) \ 856 (*current_target.to_lookup_symbol) (name, addrp) 857 858 /* Start an inferior process and set inferior_ptid to its pid. 859 EXEC_FILE is the file to run. 860 ALLARGS is a string containing the arguments to the program. 861 ENV is the environment vector to pass. Errors reported with error(). 862 On VxWorks and various standalone systems, we ignore exec_file. */ 863 864 void target_create_inferior (char *exec_file, char *args, 865 char **env, int from_tty); 866 867 /* Some targets (such as ttrace-based HPUX) don't allow us to request 868 notification of inferior events such as fork and vork immediately 869 after the inferior is created. (This because of how gdb gets an 870 inferior created via invoking a shell to do it. In such a scenario, 871 if the shell init file has commands in it, the shell will fork and 872 exec for each of those commands, and we will see each such fork 873 event. Very bad.) 874 875 Such targets will supply an appropriate definition for this function. */ 876 877 #define target_post_startup_inferior(ptid) \ 878 (*current_target.to_post_startup_inferior) (ptid) 879 880 /* On some targets, the sequence of starting up an inferior requires 881 some synchronization between gdb and the new inferior process, PID. */ 882 883 #define target_acknowledge_created_inferior(pid) \ 884 (*current_target.to_acknowledge_created_inferior) (pid) 885 886 /* On some targets, we can catch an inferior fork or vfork event when 887 it occurs. These functions insert/remove an already-created 888 catchpoint for such events. */ 889 890 #define target_insert_fork_catchpoint(pid) \ 891 (*current_target.to_insert_fork_catchpoint) (pid) 892 893 #define target_remove_fork_catchpoint(pid) \ 894 (*current_target.to_remove_fork_catchpoint) (pid) 895 896 #define target_insert_vfork_catchpoint(pid) \ 897 (*current_target.to_insert_vfork_catchpoint) (pid) 898 899 #define target_remove_vfork_catchpoint(pid) \ 900 (*current_target.to_remove_vfork_catchpoint) (pid) 901 902 /* If the inferior forks or vforks, this function will be called at 903 the next resume in order to perform any bookkeeping and fiddling 904 necessary to continue debugging either the parent or child, as 905 requested, and releasing the other. Information about the fork 906 or vfork event is available via get_last_target_status (). 907 This function returns 1 if the inferior should not be resumed 908 (i.e. there is another event pending). */ 909 910 int target_follow_fork (int follow_child); 911 912 /* On some targets, we can catch an inferior exec event when it 913 occurs. These functions insert/remove an already-created 914 catchpoint for such events. */ 915 916 #define target_insert_exec_catchpoint(pid) \ 917 (*current_target.to_insert_exec_catchpoint) (pid) 918 919 #define target_remove_exec_catchpoint(pid) \ 920 (*current_target.to_remove_exec_catchpoint) (pid) 921 922 /* Syscall catch. 923 924 NEEDED is nonzero if any syscall catch (of any kind) is requested. 925 If NEEDED is zero, it means the target can disable the mechanism to 926 catch system calls because there are no more catchpoints of this type. 927 928 ANY_COUNT is nonzero if a generic (filter-less) syscall catch is 929 being requested. In this case, both TABLE_SIZE and TABLE should 930 be ignored. 931 932 TABLE_SIZE is the number of elements in TABLE. It only matters if 933 ANY_COUNT is zero. 934 935 TABLE is an array of ints, indexed by syscall number. An element in 936 this array is nonzero if that syscall should be caught. This argument 937 only matters if ANY_COUNT is zero. */ 938 939 #define target_set_syscall_catchpoint(pid, needed, any_count, table_size, table) \ 940 (*current_target.to_set_syscall_catchpoint) (pid, needed, any_count, \ 941 table_size, table) 942 943 /* Returns TRUE if PID has exited. And, also sets EXIT_STATUS to the 944 exit code of PID, if any. */ 945 946 #define target_has_exited(pid,wait_status,exit_status) \ 947 (*current_target.to_has_exited) (pid,wait_status,exit_status) 948 949 /* The debugger has completed a blocking wait() call. There is now 950 some process event that must be processed. This function should 951 be defined by those targets that require the debugger to perform 952 cleanup or internal state changes in response to the process event. */ 953 954 /* The inferior process has died. Do what is right. */ 955 956 void target_mourn_inferior (void); 957 958 /* Does target have enough data to do a run or attach command? */ 959 960 #define target_can_run(t) \ 961 ((t)->to_can_run) () 962 963 /* post process changes to signal handling in the inferior. */ 964 965 #define target_notice_signals(ptid) \ 966 (*current_target.to_notice_signals) (ptid) 967 968 /* Check to see if a thread is still alive. */ 969 970 extern int target_thread_alive (ptid_t ptid); 971 972 /* Query for new threads and add them to the thread list. */ 973 974 extern void target_find_new_threads (void); 975 976 /* Make target stop in a continuable fashion. (For instance, under 977 Unix, this should act like SIGSTOP). This function is normally 978 used by GUIs to implement a stop button. */ 979 980 #define target_stop(ptid) (*current_target.to_stop) (ptid) 981 982 /* Send the specified COMMAND to the target's monitor 983 (shell,interpreter) for execution. The result of the query is 984 placed in OUTBUF. */ 985 986 #define target_rcmd(command, outbuf) \ 987 (*current_target.to_rcmd) (command, outbuf) 988 989 990 /* Does the target include all of memory, or only part of it? This 991 determines whether we look up the target chain for other parts of 992 memory if this target can't satisfy a request. */ 993 994 extern int target_has_all_memory_1 (void); 995 #define target_has_all_memory target_has_all_memory_1 () 996 997 /* Does the target include memory? (Dummy targets don't.) */ 998 999 extern int target_has_memory_1 (void); 1000 #define target_has_memory target_has_memory_1 () 1001 1002 /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until 1003 we start a process.) */ 1004 1005 extern int target_has_stack_1 (void); 1006 #define target_has_stack target_has_stack_1 () 1007 1008 /* Does the target have registers? (Exec files don't.) */ 1009 1010 extern int target_has_registers_1 (void); 1011 #define target_has_registers target_has_registers_1 () 1012 1013 /* Does the target have execution? Can we make it jump (through 1014 hoops), or pop its stack a few times? This means that the current 1015 target is currently executing; for some targets, that's the same as 1016 whether or not the target is capable of execution, but there are 1017 also targets which can be current while not executing. In that 1018 case this will become true after target_create_inferior or 1019 target_attach. */ 1020 1021 extern int target_has_execution_1 (void); 1022 #define target_has_execution target_has_execution_1 () 1023 1024 /* Default implementations for process_stratum targets. Return true 1025 if there's a selected inferior, false otherwise. */ 1026 1027 extern int default_child_has_all_memory (struct target_ops *ops); 1028 extern int default_child_has_memory (struct target_ops *ops); 1029 extern int default_child_has_stack (struct target_ops *ops); 1030 extern int default_child_has_registers (struct target_ops *ops); 1031 extern int default_child_has_execution (struct target_ops *ops); 1032 1033 /* Can the target support the debugger control of thread execution? 1034 Can it lock the thread scheduler? */ 1035 1036 #define target_can_lock_scheduler \ 1037 (current_target.to_has_thread_control & tc_schedlock) 1038 1039 /* Should the target enable async mode if it is supported? Temporary 1040 cludge until async mode is a strict superset of sync mode. */ 1041 extern int target_async_permitted; 1042 1043 /* Can the target support asynchronous execution? */ 1044 #define target_can_async_p() (current_target.to_can_async_p ()) 1045 1046 /* Is the target in asynchronous execution mode? */ 1047 #define target_is_async_p() (current_target.to_is_async_p ()) 1048 1049 int target_supports_non_stop (void); 1050 1051 /* Put the target in async mode with the specified callback function. */ 1052 #define target_async(CALLBACK,CONTEXT) \ 1053 (current_target.to_async ((CALLBACK), (CONTEXT))) 1054 1055 /* This is to be used ONLY within call_function_by_hand(). It provides 1056 a workaround, to have inferior function calls done in sychronous 1057 mode, even though the target is asynchronous. After 1058 target_async_mask(0) is called, calls to target_can_async_p() will 1059 return FALSE , so that target_resume() will not try to start the 1060 target asynchronously. After the inferior stops, we IMMEDIATELY 1061 restore the previous nature of the target, by calling 1062 target_async_mask(1). After that, target_can_async_p() will return 1063 TRUE. ANY OTHER USE OF THIS FEATURE IS DEPRECATED. 1064 1065 FIXME ezannoni 1999-12-13: we won't need this once we move 1066 the turning async on and off to the single execution commands, 1067 from where it is done currently, in remote_resume(). */ 1068 1069 #define target_async_mask(MASK) \ 1070 (current_target.to_async_mask (MASK)) 1071 1072 /* Converts a process id to a string. Usually, the string just contains 1073 `process xyz', but on some systems it may contain 1074 `process xyz thread abc'. */ 1075 1076 extern char *target_pid_to_str (ptid_t ptid); 1077 1078 extern char *normal_pid_to_str (ptid_t ptid); 1079 1080 /* Return a short string describing extra information about PID, 1081 e.g. "sleeping", "runnable", "running on LWP 3". Null return value 1082 is okay. */ 1083 1084 #define target_extra_thread_info(TP) \ 1085 (current_target.to_extra_thread_info (TP)) 1086 1087 /* Attempts to find the pathname of the executable file 1088 that was run to create a specified process. 1089 1090 The process PID must be stopped when this operation is used. 1091 1092 If the executable file cannot be determined, NULL is returned. 1093 1094 Else, a pointer to a character string containing the pathname 1095 is returned. This string should be copied into a buffer by 1096 the client if the string will not be immediately used, or if 1097 it must persist. */ 1098 1099 #define target_pid_to_exec_file(pid) \ 1100 (current_target.to_pid_to_exec_file) (pid) 1101 1102 /* See the to_thread_architecture description in struct target_ops. */ 1103 1104 #define target_thread_architecture(ptid) \ 1105 (current_target.to_thread_architecture (¤t_target, ptid)) 1106 1107 /* 1108 * Iterator function for target memory regions. 1109 * Calls a callback function once for each memory region 'mapped' 1110 * in the child process. Defined as a simple macro rather than 1111 * as a function macro so that it can be tested for nullity. 1112 */ 1113 1114 #define target_find_memory_regions(FUNC, DATA) \ 1115 (current_target.to_find_memory_regions) (FUNC, DATA) 1116 1117 /* 1118 * Compose corefile .note section. 1119 */ 1120 1121 #define target_make_corefile_notes(BFD, SIZE_P) \ 1122 (current_target.to_make_corefile_notes) (BFD, SIZE_P) 1123 1124 /* Hardware watchpoint interfaces. */ 1125 1126 /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or 1127 write). */ 1128 1129 #define target_stopped_by_watchpoint \ 1130 (*current_target.to_stopped_by_watchpoint) 1131 1132 /* Non-zero if we have steppable watchpoints */ 1133 1134 #define target_have_steppable_watchpoint \ 1135 (current_target.to_have_steppable_watchpoint) 1136 1137 /* Non-zero if we have continuable watchpoints */ 1138 1139 #define target_have_continuable_watchpoint \ 1140 (current_target.to_have_continuable_watchpoint) 1141 1142 /* Provide defaults for hardware watchpoint functions. */ 1143 1144 /* If the *_hw_beakpoint functions have not been defined 1145 elsewhere use the definitions in the target vector. */ 1146 1147 /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is 1148 one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or 1149 bp_hardware_breakpoint. CNT is the number of such watchpoints used so far 1150 (including this one?). OTHERTYPE is who knows what... */ 1151 1152 #define target_can_use_hardware_watchpoint(TYPE,CNT,OTHERTYPE) \ 1153 (*current_target.to_can_use_hw_breakpoint) (TYPE, CNT, OTHERTYPE); 1154 1155 #define target_region_ok_for_hw_watchpoint(addr, len) \ 1156 (*current_target.to_region_ok_for_hw_watchpoint) (addr, len) 1157 1158 1159 /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes. TYPE is 0 1160 for write, 1 for read, and 2 for read/write accesses. Returns 0 for 1161 success, non-zero for failure. */ 1162 1163 #define target_insert_watchpoint(addr, len, type) \ 1164 (*current_target.to_insert_watchpoint) (addr, len, type) 1165 1166 #define target_remove_watchpoint(addr, len, type) \ 1167 (*current_target.to_remove_watchpoint) (addr, len, type) 1168 1169 #define target_insert_hw_breakpoint(gdbarch, bp_tgt) \ 1170 (*current_target.to_insert_hw_breakpoint) (gdbarch, bp_tgt) 1171 1172 #define target_remove_hw_breakpoint(gdbarch, bp_tgt) \ 1173 (*current_target.to_remove_hw_breakpoint) (gdbarch, bp_tgt) 1174 1175 #define target_stopped_data_address(target, x) \ 1176 (*target.to_stopped_data_address) (target, x) 1177 1178 #define target_watchpoint_addr_within_range(target, addr, start, length) \ 1179 (*target.to_watchpoint_addr_within_range) (target, addr, start, length) 1180 1181 /* Target can execute in reverse? */ 1182 #define target_can_execute_reverse \ 1183 (current_target.to_can_execute_reverse ? \ 1184 current_target.to_can_execute_reverse () : 0) 1185 1186 extern const struct target_desc *target_read_description (struct target_ops *); 1187 1188 #define target_get_ada_task_ptid(lwp, tid) \ 1189 (*current_target.to_get_ada_task_ptid) (lwp,tid) 1190 1191 /* Utility implementation of searching memory. */ 1192 extern int simple_search_memory (struct target_ops* ops, 1193 CORE_ADDR start_addr, 1194 ULONGEST search_space_len, 1195 const gdb_byte *pattern, 1196 ULONGEST pattern_len, 1197 CORE_ADDR *found_addrp); 1198 1199 /* Main entry point for searching memory. */ 1200 extern int target_search_memory (CORE_ADDR start_addr, 1201 ULONGEST search_space_len, 1202 const gdb_byte *pattern, 1203 ULONGEST pattern_len, 1204 CORE_ADDR *found_addrp); 1205 1206 /* Command logging facility. */ 1207 1208 #define target_log_command(p) \ 1209 do \ 1210 if (current_target.to_log_command) \ 1211 (*current_target.to_log_command) (p); \ 1212 while (0) 1213 1214 /* Routines for maintenance of the target structures... 1215 1216 add_target: Add a target to the list of all possible targets. 1217 1218 push_target: Make this target the top of the stack of currently used 1219 targets, within its particular stratum of the stack. Result 1220 is 0 if now atop the stack, nonzero if not on top (maybe 1221 should warn user). 1222 1223 unpush_target: Remove this from the stack of currently used targets, 1224 no matter where it is on the list. Returns 0 if no 1225 change, 1 if removed from stack. 1226 1227 pop_target: Remove the top thing on the stack of current targets. */ 1228 1229 extern void add_target (struct target_ops *); 1230 1231 extern int push_target (struct target_ops *); 1232 1233 extern int unpush_target (struct target_ops *); 1234 1235 extern void target_pre_inferior (int); 1236 1237 extern void target_preopen (int); 1238 1239 extern void pop_target (void); 1240 1241 /* Does whatever cleanup is required to get rid of all pushed targets. 1242 QUITTING is propagated to target_close; it indicates that GDB is 1243 exiting and should not get hung on an error (otherwise it is 1244 important to perform clean termination, even if it takes a 1245 while). */ 1246 extern void pop_all_targets (int quitting); 1247 1248 /* Like pop_all_targets, but pops only targets whose stratum is 1249 strictly above ABOVE_STRATUM. */ 1250 extern void pop_all_targets_above (enum strata above_stratum, int quitting); 1251 1252 extern CORE_ADDR target_translate_tls_address (struct objfile *objfile, 1253 CORE_ADDR offset); 1254 1255 /* Struct target_section maps address ranges to file sections. It is 1256 mostly used with BFD files, but can be used without (e.g. for handling 1257 raw disks, or files not in formats handled by BFD). */ 1258 1259 struct target_section 1260 { 1261 CORE_ADDR addr; /* Lowest address in section */ 1262 CORE_ADDR endaddr; /* 1+highest address in section */ 1263 1264 struct bfd_section *the_bfd_section; 1265 1266 bfd *bfd; /* BFD file pointer */ 1267 }; 1268 1269 /* Holds an array of target sections. Defined by [SECTIONS..SECTIONS_END[. */ 1270 1271 struct target_section_table 1272 { 1273 struct target_section *sections; 1274 struct target_section *sections_end; 1275 }; 1276 1277 /* Return the "section" containing the specified address. */ 1278 struct target_section *target_section_by_addr (struct target_ops *target, 1279 CORE_ADDR addr); 1280 1281 /* Return the target section table this target (or the targets 1282 beneath) currently manipulate. */ 1283 1284 extern struct target_section_table *target_get_section_table 1285 (struct target_ops *target); 1286 1287 /* From mem-break.c */ 1288 1289 extern int memory_remove_breakpoint (struct gdbarch *, struct bp_target_info *); 1290 1291 extern int memory_insert_breakpoint (struct gdbarch *, struct bp_target_info *); 1292 1293 extern int default_memory_remove_breakpoint (struct gdbarch *, struct bp_target_info *); 1294 1295 extern int default_memory_insert_breakpoint (struct gdbarch *, struct bp_target_info *); 1296 1297 1298 /* From target.c */ 1299 1300 extern void initialize_targets (void); 1301 1302 extern NORETURN void noprocess (void) ATTR_NORETURN; 1303 1304 extern void target_require_runnable (void); 1305 1306 extern void find_default_attach (struct target_ops *, char *, int); 1307 1308 extern void find_default_create_inferior (struct target_ops *, 1309 char *, char *, char **, int); 1310 1311 extern struct target_ops *find_run_target (void); 1312 1313 extern struct target_ops *find_core_target (void); 1314 1315 extern struct target_ops *find_target_beneath (struct target_ops *); 1316 1317 /* Read OS data object of type TYPE from the target, and return it in 1318 XML format. The result is NUL-terminated and returned as a string, 1319 allocated using xmalloc. If an error occurs or the transfer is 1320 unsupported, NULL is returned. Empty objects are returned as 1321 allocated but empty strings. */ 1322 1323 extern char *target_get_osdata (const char *type); 1324 1325 1326 /* Stuff that should be shared among the various remote targets. */ 1327 1328 /* Debugging level. 0 is off, and non-zero values mean to print some debug 1329 information (higher values, more information). */ 1330 extern int remote_debug; 1331 1332 /* Speed in bits per second, or -1 which means don't mess with the speed. */ 1333 extern int baud_rate; 1334 /* Timeout limit for response from target. */ 1335 extern int remote_timeout; 1336 1337 1338 /* Functions for helping to write a native target. */ 1339 1340 /* This is for native targets which use a unix/POSIX-style waitstatus. */ 1341 extern void store_waitstatus (struct target_waitstatus *, int); 1342 1343 /* These are in common/signals.c, but they're only used by gdb. */ 1344 extern enum target_signal default_target_signal_from_host (struct gdbarch *, 1345 int); 1346 extern int default_target_signal_to_host (struct gdbarch *, 1347 enum target_signal); 1348 1349 /* Convert from a number used in a GDB command to an enum target_signal. */ 1350 extern enum target_signal target_signal_from_command (int); 1351 /* End of files in common/signals.c. */ 1352 1353 /* Set the show memory breakpoints mode to show, and installs a cleanup 1354 to restore it back to the current value. */ 1355 extern struct cleanup *make_show_memory_breakpoints_cleanup (int show); 1356 1357 1358 /* Imported from machine dependent code */ 1359 1360 /* Blank target vector entries are initialized to target_ignore. */ 1361 void target_ignore (void); 1362 1363 extern struct target_ops deprecated_child_ops; 1364 1365 #endif /* !defined (TARGET_H) */ 1366