1 /* Interface between GDB and target environments, including files and processes
3 Copyright (C) 1990-2012 Free Software Foundation, Inc.
5 Contributed by Cygnus Support. Written by John Gilmore.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #if !defined (TARGET_H)
30 struct bp_target_info;
32 struct target_section_table;
33 struct trace_state_variable;
37 struct static_tracepoint_marker;
38 struct traceframe_info;
41 /* This include file defines the interface between the main part
42 of the debugger, and the part which is target-specific, or
43 specific to the communications interface between us and the
46 A TARGET is an interface between the debugger and a particular
47 kind of file or process. Targets can be STACKED in STRATA,
48 so that more than one target can potentially respond to a request.
49 In particular, memory accesses will walk down the stack of targets
50 until they find a target that is interested in handling that particular
51 address. STRATA are artificial boundaries on the stack, within
52 which particular kinds of targets live. Strata exist so that
53 people don't get confused by pushing e.g. a process target and then
54 a file target, and wondering why they can't see the current values
55 of variables any more (the file target is handling them and they
56 never get to the process target). So when you push a file target,
57 it goes into the file stratum, which is always below the process
64 #include "gdb_signals.h"
68 dummy_stratum, /* The lowest of the low */
69 file_stratum, /* Executable files, etc */
70 process_stratum, /* Executing processes or core dump files */
71 thread_stratum, /* Executing threads */
72 record_stratum, /* Support record debugging */
73 arch_stratum /* Architecture overrides */
76 enum thread_control_capabilities
78 tc_none = 0, /* Default: can't control thread execution. */
79 tc_schedlock = 1, /* Can lock the thread scheduler. */
82 /* Stuff for target_wait. */
84 /* Generally, what has the program done? */
87 /* The program has exited. The exit status is in value.integer. */
88 TARGET_WAITKIND_EXITED,
90 /* The program has stopped with a signal. Which signal is in
92 TARGET_WAITKIND_STOPPED,
94 /* The program has terminated with a signal. Which signal is in
96 TARGET_WAITKIND_SIGNALLED,
98 /* The program is letting us know that it dynamically loaded something
99 (e.g. it called load(2) on AIX). */
100 TARGET_WAITKIND_LOADED,
102 /* The program has forked. A "related" process' PTID is in
103 value.related_pid. I.e., if the child forks, value.related_pid
104 is the parent's ID. */
106 TARGET_WAITKIND_FORKED,
108 /* The program has vforked. A "related" process's PTID is in
109 value.related_pid. */
111 TARGET_WAITKIND_VFORKED,
113 /* The program has exec'ed a new executable file. The new file's
114 pathname is pointed to by value.execd_pathname. */
116 TARGET_WAITKIND_EXECD,
118 /* The program had previously vforked, and now the child is done
119 with the shared memory region, because it exec'ed or exited.
120 Note that the event is reported to the vfork parent. This is
121 only used if GDB did not stay attached to the vfork child,
122 otherwise, a TARGET_WAITKIND_EXECD or
123 TARGET_WAITKIND_EXIT|SIGNALLED event associated with the child
124 has the same effect. */
125 TARGET_WAITKIND_VFORK_DONE,
127 /* The program has entered or returned from a system call. On
128 HP-UX, this is used in the hardware watchpoint implementation.
129 The syscall's unique integer ID number is in value.syscall_id. */
131 TARGET_WAITKIND_SYSCALL_ENTRY,
132 TARGET_WAITKIND_SYSCALL_RETURN,
134 /* Nothing happened, but we stopped anyway. This perhaps should be handled
135 within target_wait, but I'm not sure target_wait should be resuming the
137 TARGET_WAITKIND_SPURIOUS,
139 /* An event has occured, but we should wait again.
140 Remote_async_wait() returns this when there is an event
141 on the inferior, but the rest of the world is not interested in
142 it. The inferior has not stopped, but has just sent some output
143 to the console, for instance. In this case, we want to go back
144 to the event loop and wait there for another event from the
145 inferior, rather than being stuck in the remote_async_wait()
146 function. sThis way the event loop is responsive to other events,
147 like for instance the user typing. */
148 TARGET_WAITKIND_IGNORE,
150 /* The target has run out of history information,
151 and cannot run backward any further. */
152 TARGET_WAITKIND_NO_HISTORY,
154 /* There are no resumed children left in the program. */
155 TARGET_WAITKIND_NO_RESUMED
158 struct target_waitstatus
160 enum target_waitkind kind;
162 /* Forked child pid, execd pathname, exit status, signal number or
167 enum target_signal sig;
169 char *execd_pathname;
175 /* Options that can be passed to target_wait. */
177 /* Return immediately if there's no event already queued. If this
178 options is not requested, target_wait blocks waiting for an
180 #define TARGET_WNOHANG 1
182 /* The structure below stores information about a system call.
183 It is basically used in the "catch syscall" command, and in
184 every function that gives information about a system call.
186 It's also good to mention that its fields represent everything
187 that we currently know about a syscall in GDB. */
190 /* The syscall number. */
193 /* The syscall name. */
197 /* Return a pretty printed form of target_waitstatus.
198 Space for the result is malloc'd, caller must free. */
199 extern char *target_waitstatus_to_string (const struct target_waitstatus *);
201 /* Possible types of events that the inferior handler will have to
203 enum inferior_event_type
205 /* Process a normal inferior event which will result in target_wait
208 /* We are called because a timer went off. */
210 /* We are called to do stuff after the inferior stops. */
212 /* We are called to do some stuff after the inferior stops, but we
213 are expected to reenter the proceed() and
214 handle_inferior_event() functions. This is used only in case of
215 'step n' like commands. */
219 /* Target objects which can be transfered using target_read,
220 target_write, et cetera. */
224 /* AVR target specific transfer. See "avr-tdep.c" and "remote.c". */
226 /* SPU target specific transfer. See "spu-tdep.c". */
228 /* Transfer up-to LEN bytes of memory starting at OFFSET. */
229 TARGET_OBJECT_MEMORY,
230 /* Memory, avoiding GDB's data cache and trusting the executable.
231 Target implementations of to_xfer_partial never need to handle
232 this object, and most callers should not use it. */
233 TARGET_OBJECT_RAW_MEMORY,
234 /* Memory known to be part of the target's stack. This is cached even
235 if it is not in a region marked as such, since it is known to be
237 TARGET_OBJECT_STACK_MEMORY,
238 /* Kernel Unwind Table. See "ia64-tdep.c". */
239 TARGET_OBJECT_UNWIND_TABLE,
240 /* Transfer auxilliary vector. */
242 /* StackGhost cookie. See "sparc-tdep.c". */
243 TARGET_OBJECT_WCOOKIE,
244 /* Target memory map in XML format. */
245 TARGET_OBJECT_MEMORY_MAP,
246 /* Flash memory. This object can be used to write contents to
247 a previously erased flash memory. Using it without erasing
248 flash can have unexpected results. Addresses are physical
249 address on target, and not relative to flash start. */
251 /* Available target-specific features, e.g. registers and coprocessors.
252 See "target-descriptions.c". ANNEX should never be empty. */
253 TARGET_OBJECT_AVAILABLE_FEATURES,
254 /* Currently loaded libraries, in XML format. */
255 TARGET_OBJECT_LIBRARIES,
256 /* Currently loaded libraries specific for SVR4 systems, in XML format. */
257 TARGET_OBJECT_LIBRARIES_SVR4,
258 /* Get OS specific data. The ANNEX specifies the type (running
259 processes, etc.). The data being transfered is expected to follow
260 the DTD specified in features/osdata.dtd. */
261 TARGET_OBJECT_OSDATA,
262 /* Extra signal info. Usually the contents of `siginfo_t' on unix
264 TARGET_OBJECT_SIGNAL_INFO,
265 /* The list of threads that are being debugged. */
266 TARGET_OBJECT_THREADS,
267 /* Collected static trace data. */
268 TARGET_OBJECT_STATIC_TRACE_DATA,
269 /* The HP-UX registers (those that can be obtained or modified by using
270 the TT_LWP_RUREGS/TT_LWP_WUREGS ttrace requests). */
271 TARGET_OBJECT_HPUX_UREGS,
272 /* The HP-UX shared library linkage pointer. ANNEX should be a string
273 image of the code address whose linkage pointer we are looking for.
275 The size of the data transfered is always 8 bytes (the size of an
277 TARGET_OBJECT_HPUX_SOLIB_GOT,
278 /* Traceframe info, in XML format. */
279 TARGET_OBJECT_TRACEFRAME_INFO,
280 /* Load maps for FDPIC systems. */
282 /* Darwin dynamic linker info data. */
283 TARGET_OBJECT_DARWIN_DYLD_INFO,
284 /* OpenVMS Unwind Information Block. */
285 TARGET_OBJECT_OPENVMS_UIB
286 /* Possible future objects: TARGET_OBJECT_FILE, ... */
289 /* Enumeration of the kinds of traceframe searches that a target may
290 be able to perform. */
301 typedef struct static_tracepoint_marker *static_tracepoint_marker_p;
302 DEF_VEC_P(static_tracepoint_marker_p);
304 /* Request that OPS transfer up to LEN 8-bit bytes of the target's
305 OBJECT. The OFFSET, for a seekable object, specifies the
306 starting point. The ANNEX can be used to provide additional
307 data-specific information to the target.
309 Return the number of bytes actually transfered, or -1 if the
310 transfer is not supported or otherwise fails. Return of a positive
311 value less than LEN indicates that no further transfer is possible.
312 Unlike the raw to_xfer_partial interface, callers of these
313 functions do not need to retry partial transfers. */
315 extern LONGEST target_read (struct target_ops *ops,
316 enum target_object object,
317 const char *annex, gdb_byte *buf,
318 ULONGEST offset, LONGEST len);
320 struct memory_read_result
322 /* First address that was read. */
324 /* Past-the-end address. */
329 typedef struct memory_read_result memory_read_result_s;
330 DEF_VEC_O(memory_read_result_s);
332 extern void free_memory_read_result_vector (void *);
334 extern VEC(memory_read_result_s)* read_memory_robust (struct target_ops *ops,
338 extern LONGEST target_write (struct target_ops *ops,
339 enum target_object object,
340 const char *annex, const gdb_byte *buf,
341 ULONGEST offset, LONGEST len);
343 /* Similar to target_write, except that it also calls PROGRESS with
344 the number of bytes written and the opaque BATON after every
345 successful partial write (and before the first write). This is
346 useful for progress reporting and user interaction while writing
347 data. To abort the transfer, the progress callback can throw an
350 LONGEST target_write_with_progress (struct target_ops *ops,
351 enum target_object object,
352 const char *annex, const gdb_byte *buf,
353 ULONGEST offset, LONGEST len,
354 void (*progress) (ULONGEST, void *),
357 /* Wrapper to perform a full read of unknown size. OBJECT/ANNEX will
358 be read using OPS. The return value will be -1 if the transfer
359 fails or is not supported; 0 if the object is empty; or the length
360 of the object otherwise. If a positive value is returned, a
361 sufficiently large buffer will be allocated using xmalloc and
362 returned in *BUF_P containing the contents of the object.
364 This method should be used for objects sufficiently small to store
365 in a single xmalloc'd buffer, when no fixed bound on the object's
366 size is known in advance. Don't try to read TARGET_OBJECT_MEMORY
367 through this function. */
369 extern LONGEST target_read_alloc (struct target_ops *ops,
370 enum target_object object,
371 const char *annex, gdb_byte **buf_p);
373 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
374 returned as a string, allocated using xmalloc. If an error occurs
375 or the transfer is unsupported, NULL is returned. Empty objects
376 are returned as allocated but empty strings. A warning is issued
377 if the result contains any embedded NUL bytes. */
379 extern char *target_read_stralloc (struct target_ops *ops,
380 enum target_object object,
383 /* Wrappers to target read/write that perform memory transfers. They
384 throw an error if the memory transfer fails.
386 NOTE: cagney/2003-10-23: The naming schema is lifted from
387 "frame.h". The parameter order is lifted from get_frame_memory,
388 which in turn lifted it from read_memory. */
390 extern void get_target_memory (struct target_ops *ops, CORE_ADDR addr,
391 gdb_byte *buf, LONGEST len);
392 extern ULONGEST get_target_memory_unsigned (struct target_ops *ops,
393 CORE_ADDR addr, int len,
394 enum bfd_endian byte_order);
396 struct thread_info; /* fwd decl for parameter list below: */
400 struct target_ops *beneath; /* To the target under this one. */
401 char *to_shortname; /* Name this target type */
402 char *to_longname; /* Name for printing */
403 char *to_doc; /* Documentation. Does not include trailing
404 newline, and starts with a one-line descrip-
405 tion (probably similar to to_longname). */
406 /* Per-target scratch pad. */
408 /* The open routine takes the rest of the parameters from the
409 command, and (if successful) pushes a new target onto the
410 stack. Targets should supply this routine, if only to provide
412 void (*to_open) (char *, int);
413 /* Old targets with a static target vector provide "to_close".
414 New re-entrant targets provide "to_xclose" and that is expected
415 to xfree everything (including the "struct target_ops"). */
416 void (*to_xclose) (struct target_ops *targ, int quitting);
417 void (*to_close) (int);
418 void (*to_attach) (struct target_ops *ops, char *, int);
419 void (*to_post_attach) (int);
420 void (*to_detach) (struct target_ops *ops, char *, int);
421 void (*to_disconnect) (struct target_ops *, char *, int);
422 void (*to_resume) (struct target_ops *, ptid_t, int, enum target_signal);
423 ptid_t (*to_wait) (struct target_ops *,
424 ptid_t, struct target_waitstatus *, int);
425 void (*to_fetch_registers) (struct target_ops *, struct regcache *, int);
426 void (*to_store_registers) (struct target_ops *, struct regcache *, int);
427 void (*to_prepare_to_store) (struct regcache *);
429 /* Transfer LEN bytes of memory between GDB address MYADDR and
430 target address MEMADDR. If WRITE, transfer them to the target, else
431 transfer them from the target. TARGET is the target from which we
434 Return value, N, is one of the following:
436 0 means that we can't handle this. If errno has been set, it is the
437 error which prevented us from doing it (FIXME: What about bfd_error?).
439 positive (call it N) means that we have transferred N bytes
440 starting at MEMADDR. We might be able to handle more bytes
441 beyond this length, but no promises.
443 negative (call its absolute value N) means that we cannot
444 transfer right at MEMADDR, but we could transfer at least
445 something at MEMADDR + N.
447 NOTE: cagney/2004-10-01: This has been entirely superseeded by
448 to_xfer_partial and inferior inheritance. */
450 int (*deprecated_xfer_memory) (CORE_ADDR memaddr, gdb_byte *myaddr,
452 struct mem_attrib *attrib,
453 struct target_ops *target);
455 void (*to_files_info) (struct target_ops *);
456 int (*to_insert_breakpoint) (struct gdbarch *, struct bp_target_info *);
457 int (*to_remove_breakpoint) (struct gdbarch *, struct bp_target_info *);
458 int (*to_can_use_hw_breakpoint) (int, int, int);
459 int (*to_ranged_break_num_registers) (struct target_ops *);
460 int (*to_insert_hw_breakpoint) (struct gdbarch *, struct bp_target_info *);
461 int (*to_remove_hw_breakpoint) (struct gdbarch *, struct bp_target_info *);
463 /* Documentation of what the two routines below are expected to do is
464 provided with the corresponding target_* macros. */
465 int (*to_remove_watchpoint) (CORE_ADDR, int, int, struct expression *);
466 int (*to_insert_watchpoint) (CORE_ADDR, int, int, struct expression *);
468 int (*to_insert_mask_watchpoint) (struct target_ops *,
469 CORE_ADDR, CORE_ADDR, int);
470 int (*to_remove_mask_watchpoint) (struct target_ops *,
471 CORE_ADDR, CORE_ADDR, int);
472 int (*to_stopped_by_watchpoint) (void);
473 int to_have_steppable_watchpoint;
474 int to_have_continuable_watchpoint;
475 int (*to_stopped_data_address) (struct target_ops *, CORE_ADDR *);
476 int (*to_watchpoint_addr_within_range) (struct target_ops *,
477 CORE_ADDR, CORE_ADDR, int);
479 /* Documentation of this routine is provided with the corresponding
481 int (*to_region_ok_for_hw_watchpoint) (CORE_ADDR, int);
483 int (*to_can_accel_watchpoint_condition) (CORE_ADDR, int, int,
484 struct expression *);
485 int (*to_masked_watch_num_registers) (struct target_ops *,
486 CORE_ADDR, CORE_ADDR);
487 void (*to_terminal_init) (void);
488 void (*to_terminal_inferior) (void);
489 void (*to_terminal_ours_for_output) (void);
490 void (*to_terminal_ours) (void);
491 void (*to_terminal_save_ours) (void);
492 void (*to_terminal_info) (char *, int);
493 void (*to_kill) (struct target_ops *);
494 void (*to_load) (char *, int);
495 void (*to_create_inferior) (struct target_ops *,
496 char *, char *, char **, int);
497 void (*to_post_startup_inferior) (ptid_t);
498 int (*to_insert_fork_catchpoint) (int);
499 int (*to_remove_fork_catchpoint) (int);
500 int (*to_insert_vfork_catchpoint) (int);
501 int (*to_remove_vfork_catchpoint) (int);
502 int (*to_follow_fork) (struct target_ops *, int);
503 int (*to_insert_exec_catchpoint) (int);
504 int (*to_remove_exec_catchpoint) (int);
505 int (*to_set_syscall_catchpoint) (int, int, int, int, int *);
506 int (*to_has_exited) (int, int, int *);
507 void (*to_mourn_inferior) (struct target_ops *);
508 int (*to_can_run) (void);
510 /* Documentation of this routine is provided with the corresponding
512 void (*to_pass_signals) (int, unsigned char *);
514 /* Documentation of this routine is provided with the
515 corresponding target_* function. */
516 void (*to_program_signals) (int, unsigned char *);
518 int (*to_thread_alive) (struct target_ops *, ptid_t ptid);
519 void (*to_find_new_threads) (struct target_ops *);
520 char *(*to_pid_to_str) (struct target_ops *, ptid_t);
521 char *(*to_extra_thread_info) (struct thread_info *);
522 char *(*to_thread_name) (struct thread_info *);
523 void (*to_stop) (ptid_t);
524 void (*to_rcmd) (char *command, struct ui_file *output);
525 char *(*to_pid_to_exec_file) (int pid);
526 void (*to_log_command) (const char *);
527 struct target_section_table *(*to_get_section_table) (struct target_ops *);
528 enum strata to_stratum;
529 int (*to_has_all_memory) (struct target_ops *);
530 int (*to_has_memory) (struct target_ops *);
531 int (*to_has_stack) (struct target_ops *);
532 int (*to_has_registers) (struct target_ops *);
533 int (*to_has_execution) (struct target_ops *, ptid_t);
534 int to_has_thread_control; /* control thread execution */
535 int to_attach_no_wait;
536 /* ASYNC target controls */
537 int (*to_can_async_p) (void);
538 int (*to_is_async_p) (void);
539 void (*to_async) (void (*) (enum inferior_event_type, void *), void *);
540 int (*to_supports_non_stop) (void);
541 /* find_memory_regions support method for gcore */
542 int (*to_find_memory_regions) (find_memory_region_ftype func, void *data);
543 /* make_corefile_notes support method for gcore */
544 char * (*to_make_corefile_notes) (bfd *, int *);
545 /* get_bookmark support method for bookmarks */
546 gdb_byte * (*to_get_bookmark) (char *, int);
547 /* goto_bookmark support method for bookmarks */
548 void (*to_goto_bookmark) (gdb_byte *, int);
549 /* Return the thread-local address at OFFSET in the
550 thread-local storage for the thread PTID and the shared library
551 or executable file given by OBJFILE. If that block of
552 thread-local storage hasn't been allocated yet, this function
553 may return an error. */
554 CORE_ADDR (*to_get_thread_local_address) (struct target_ops *ops,
556 CORE_ADDR load_module_addr,
559 /* Request that OPS transfer up to LEN 8-bit bytes of the target's
560 OBJECT. The OFFSET, for a seekable object, specifies the
561 starting point. The ANNEX can be used to provide additional
562 data-specific information to the target.
564 Return the number of bytes actually transfered, zero when no
565 further transfer is possible, and -1 when the transfer is not
566 supported. Return of a positive value smaller than LEN does
567 not indicate the end of the object, only the end of the
568 transfer; higher level code should continue transferring if
569 desired. This is handled in target.c.
571 The interface does not support a "retry" mechanism. Instead it
572 assumes that at least one byte will be transfered on each
575 NOTE: cagney/2003-10-17: The current interface can lead to
576 fragmented transfers. Lower target levels should not implement
577 hacks, such as enlarging the transfer, in an attempt to
578 compensate for this. Instead, the target stack should be
579 extended so that it implements supply/collect methods and a
580 look-aside object cache. With that available, the lowest
581 target can safely and freely "push" data up the stack.
583 See target_read and target_write for more information. One,
584 and only one, of readbuf or writebuf must be non-NULL. */
586 LONGEST (*to_xfer_partial) (struct target_ops *ops,
587 enum target_object object, const char *annex,
588 gdb_byte *readbuf, const gdb_byte *writebuf,
589 ULONGEST offset, LONGEST len);
591 /* Returns the memory map for the target. A return value of NULL
592 means that no memory map is available. If a memory address
593 does not fall within any returned regions, it's assumed to be
594 RAM. The returned memory regions should not overlap.
596 The order of regions does not matter; target_memory_map will
597 sort regions by starting address. For that reason, this
598 function should not be called directly except via
601 This method should not cache data; if the memory map could
602 change unexpectedly, it should be invalidated, and higher
603 layers will re-fetch it. */
604 VEC(mem_region_s) *(*to_memory_map) (struct target_ops *);
606 /* Erases the region of flash memory starting at ADDRESS, of
609 Precondition: both ADDRESS and ADDRESS+LENGTH should be aligned
610 on flash block boundaries, as reported by 'to_memory_map'. */
611 void (*to_flash_erase) (struct target_ops *,
612 ULONGEST address, LONGEST length);
614 /* Finishes a flash memory write sequence. After this operation
615 all flash memory should be available for writing and the result
616 of reading from areas written by 'to_flash_write' should be
617 equal to what was written. */
618 void (*to_flash_done) (struct target_ops *);
620 /* Describe the architecture-specific features of this target.
621 Returns the description found, or NULL if no description
623 const struct target_desc *(*to_read_description) (struct target_ops *ops);
625 /* Build the PTID of the thread on which a given task is running,
626 based on LWP and THREAD. These values are extracted from the
627 task Private_Data section of the Ada Task Control Block, and
628 their interpretation depends on the target. */
629 ptid_t (*to_get_ada_task_ptid) (long lwp, long thread);
631 /* Read one auxv entry from *READPTR, not reading locations >= ENDPTR.
632 Return 0 if *READPTR is already at the end of the buffer.
633 Return -1 if there is insufficient buffer for a whole entry.
634 Return 1 if an entry was read into *TYPEP and *VALP. */
635 int (*to_auxv_parse) (struct target_ops *ops, gdb_byte **readptr,
636 gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp);
638 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
639 sequence of bytes in PATTERN with length PATTERN_LEN.
641 The result is 1 if found, 0 if not found, and -1 if there was an error
642 requiring halting of the search (e.g. memory read error).
643 If the pattern is found the address is recorded in FOUND_ADDRP. */
644 int (*to_search_memory) (struct target_ops *ops,
645 CORE_ADDR start_addr, ULONGEST search_space_len,
646 const gdb_byte *pattern, ULONGEST pattern_len,
647 CORE_ADDR *found_addrp);
649 /* Can target execute in reverse? */
650 int (*to_can_execute_reverse) (void);
652 /* The direction the target is currently executing. Must be
653 implemented on targets that support reverse execution and async
654 mode. The default simply returns forward execution. */
655 enum exec_direction_kind (*to_execution_direction) (void);
657 /* Does this target support debugging multiple processes
659 int (*to_supports_multi_process) (void);
661 /* Does this target support enabling and disabling tracepoints while a trace
662 experiment is running? */
663 int (*to_supports_enable_disable_tracepoint) (void);
665 /* Does this target support disabling address space randomization? */
666 int (*to_supports_disable_randomization) (void);
668 /* Does this target support the tracenz bytecode for string collection? */
669 int (*to_supports_string_tracing) (void);
671 /* Does this target support evaluation of breakpoint conditions on its
673 int (*to_supports_evaluation_of_breakpoint_conditions) (void);
675 /* Determine current architecture of thread PTID.
677 The target is supposed to determine the architecture of the code where
678 the target is currently stopped at (on Cell, if a target is in spu_run,
679 to_thread_architecture would return SPU, otherwise PPC32 or PPC64).
680 This is architecture used to perform decr_pc_after_break adjustment,
681 and also determines the frame architecture of the innermost frame.
682 ptrace operations need to operate according to target_gdbarch.
684 The default implementation always returns target_gdbarch. */
685 struct gdbarch *(*to_thread_architecture) (struct target_ops *, ptid_t);
687 /* Determine current address space of thread PTID.
689 The default implementation always returns the inferior's
691 struct address_space *(*to_thread_address_space) (struct target_ops *,
694 /* Target file operations. */
696 /* Open FILENAME on the target, using FLAGS and MODE. Return a
697 target file descriptor, or -1 if an error occurs (and set
699 int (*to_fileio_open) (const char *filename, int flags, int mode,
702 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
703 Return the number of bytes written, or -1 if an error occurs
704 (and set *TARGET_ERRNO). */
705 int (*to_fileio_pwrite) (int fd, const gdb_byte *write_buf, int len,
706 ULONGEST offset, int *target_errno);
708 /* Read up to LEN bytes FD on the target into READ_BUF.
709 Return the number of bytes read, or -1 if an error occurs
710 (and set *TARGET_ERRNO). */
711 int (*to_fileio_pread) (int fd, gdb_byte *read_buf, int len,
712 ULONGEST offset, int *target_errno);
714 /* Close FD on the target. Return 0, or -1 if an error occurs
715 (and set *TARGET_ERRNO). */
716 int (*to_fileio_close) (int fd, int *target_errno);
718 /* Unlink FILENAME on the target. Return 0, or -1 if an error
719 occurs (and set *TARGET_ERRNO). */
720 int (*to_fileio_unlink) (const char *filename, int *target_errno);
722 /* Read value of symbolic link FILENAME on the target. Return a
723 null-terminated string allocated via xmalloc, or NULL if an error
724 occurs (and set *TARGET_ERRNO). */
725 char *(*to_fileio_readlink) (const char *filename, int *target_errno);
728 /* Implement the "info proc" command. */
729 void (*to_info_proc) (struct target_ops *, char *, enum info_proc_what);
731 /* Tracepoint-related operations. */
733 /* Prepare the target for a tracing run. */
734 void (*to_trace_init) (void);
736 /* Send full details of a tracepoint location to the target. */
737 void (*to_download_tracepoint) (struct bp_location *location);
739 /* Is the target able to download tracepoint locations in current
741 int (*to_can_download_tracepoint) (void);
743 /* Send full details of a trace state variable to the target. */
744 void (*to_download_trace_state_variable) (struct trace_state_variable *tsv);
746 /* Enable a tracepoint on the target. */
747 void (*to_enable_tracepoint) (struct bp_location *location);
749 /* Disable a tracepoint on the target. */
750 void (*to_disable_tracepoint) (struct bp_location *location);
752 /* Inform the target info of memory regions that are readonly
753 (such as text sections), and so it should return data from
754 those rather than look in the trace buffer. */
755 void (*to_trace_set_readonly_regions) (void);
757 /* Start a trace run. */
758 void (*to_trace_start) (void);
760 /* Get the current status of a tracing run. */
761 int (*to_get_trace_status) (struct trace_status *ts);
763 void (*to_get_tracepoint_status) (struct breakpoint *tp,
764 struct uploaded_tp *utp);
766 /* Stop a trace run. */
767 void (*to_trace_stop) (void);
769 /* Ask the target to find a trace frame of the given type TYPE,
770 using NUM, ADDR1, and ADDR2 as search parameters. Returns the
771 number of the trace frame, and also the tracepoint number at
772 TPP. If no trace frame matches, return -1. May throw if the
774 int (*to_trace_find) (enum trace_find_type type, int num,
775 ULONGEST addr1, ULONGEST addr2, int *tpp);
777 /* Get the value of the trace state variable number TSV, returning
778 1 if the value is known and writing the value itself into the
779 location pointed to by VAL, else returning 0. */
780 int (*to_get_trace_state_variable_value) (int tsv, LONGEST *val);
782 int (*to_save_trace_data) (const char *filename);
784 int (*to_upload_tracepoints) (struct uploaded_tp **utpp);
786 int (*to_upload_trace_state_variables) (struct uploaded_tsv **utsvp);
788 LONGEST (*to_get_raw_trace_data) (gdb_byte *buf,
789 ULONGEST offset, LONGEST len);
791 /* Get the minimum length of instruction on which a fast tracepoint
792 may be set on the target. If this operation is unsupported,
793 return -1. If for some reason the minimum length cannot be
794 determined, return 0. */
795 int (*to_get_min_fast_tracepoint_insn_len) (void);
797 /* Set the target's tracing behavior in response to unexpected
798 disconnection - set VAL to 1 to keep tracing, 0 to stop. */
799 void (*to_set_disconnected_tracing) (int val);
800 void (*to_set_circular_trace_buffer) (int val);
802 /* Add/change textual notes about the trace run, returning 1 if
803 successful, 0 otherwise. */
804 int (*to_set_trace_notes) (char *user, char *notes, char* stopnotes);
806 /* Return the processor core that thread PTID was last seen on.
807 This information is updated only when:
808 - update_thread_list is called
810 If the core cannot be determined -- either for the specified
811 thread, or right now, or in this debug session, or for this
812 target -- return -1. */
813 int (*to_core_of_thread) (struct target_ops *, ptid_t ptid);
815 /* Verify that the memory in the [MEMADDR, MEMADDR+SIZE) range
816 matches the contents of [DATA,DATA+SIZE). Returns 1 if there's
817 a match, 0 if there's a mismatch, and -1 if an error is
818 encountered while reading memory. */
819 int (*to_verify_memory) (struct target_ops *, const gdb_byte *data,
820 CORE_ADDR memaddr, ULONGEST size);
822 /* Return the address of the start of the Thread Information Block
823 a Windows OS specific feature. */
824 int (*to_get_tib_address) (ptid_t ptid, CORE_ADDR *addr);
826 /* Send the new settings of write permission variables. */
827 void (*to_set_permissions) (void);
829 /* Look for a static tracepoint marker at ADDR, and fill in MARKER
830 with its details. Return 1 on success, 0 on failure. */
831 int (*to_static_tracepoint_marker_at) (CORE_ADDR,
832 struct static_tracepoint_marker *marker);
834 /* Return a vector of all tracepoints markers string id ID, or all
835 markers if ID is NULL. */
836 VEC(static_tracepoint_marker_p) *(*to_static_tracepoint_markers_by_strid)
839 /* Return a traceframe info object describing the current
840 traceframe's contents. This method should not cache data;
841 higher layers take care of caching, invalidating, and
842 re-fetching when necessary. */
843 struct traceframe_info *(*to_traceframe_info) (void);
845 /* Ask the target to use or not to use agent according to USE. Return 1
846 successful, 0 otherwise. */
847 int (*to_use_agent) (int use);
849 /* Is the target able to use agent in current state? */
850 int (*to_can_use_agent) (void);
853 /* Need sub-structure for target machine related rather than comm related?
857 /* Magic number for checking ops size. If a struct doesn't end with this
858 number, somebody changed the declaration but didn't change all the
859 places that initialize one. */
861 #define OPS_MAGIC 3840
863 /* The ops structure for our "current" target process. This should
864 never be NULL. If there is no target, it points to the dummy_target. */
866 extern struct target_ops current_target;
868 /* Define easy words for doing these operations on our current target. */
870 #define target_shortname (current_target.to_shortname)
871 #define target_longname (current_target.to_longname)
873 /* Does whatever cleanup is required for a target that we are no
874 longer going to be calling. QUITTING indicates that GDB is exiting
875 and should not get hung on an error (otherwise it is important to
876 perform clean termination, even if it takes a while). This routine
877 is automatically always called after popping the target off the
878 target stack - the target's own methods are no longer available
879 through the target vector. Closing file descriptors and freeing all
880 memory allocated memory are typical things it should do. */
882 void target_close (struct target_ops *targ, int quitting);
884 /* Attaches to a process on the target side. Arguments are as passed
885 to the `attach' command by the user. This routine can be called
886 when the target is not on the target-stack, if the target_can_run
887 routine returns 1; in that case, it must push itself onto the stack.
888 Upon exit, the target should be ready for normal operations, and
889 should be ready to deliver the status of the process immediately
890 (without waiting) to an upcoming target_wait call. */
892 void target_attach (char *, int);
894 /* Some targets don't generate traps when attaching to the inferior,
895 or their target_attach implementation takes care of the waiting.
896 These targets must set to_attach_no_wait. */
898 #define target_attach_no_wait \
899 (current_target.to_attach_no_wait)
901 /* The target_attach operation places a process under debugger control,
902 and stops the process.
904 This operation provides a target-specific hook that allows the
905 necessary bookkeeping to be performed after an attach completes. */
906 #define target_post_attach(pid) \
907 (*current_target.to_post_attach) (pid)
909 /* Takes a program previously attached to and detaches it.
910 The program may resume execution (some targets do, some don't) and will
911 no longer stop on signals, etc. We better not have left any breakpoints
912 in the program or it'll die when it hits one. ARGS is arguments
913 typed by the user (e.g. a signal to send the process). FROM_TTY
914 says whether to be verbose or not. */
916 extern void target_detach (char *, int);
918 /* Disconnect from the current target without resuming it (leaving it
919 waiting for a debugger). */
921 extern void target_disconnect (char *, int);
923 /* Resume execution of the target process PTID. STEP says whether to
924 single-step or to run free; SIGGNAL is the signal to be given to
925 the target, or TARGET_SIGNAL_0 for no signal. The caller may not
926 pass TARGET_SIGNAL_DEFAULT. */
928 extern void target_resume (ptid_t ptid, int step, enum target_signal signal);
930 /* Wait for process pid to do something. PTID = -1 to wait for any
931 pid to do something. Return pid of child, or -1 in case of error;
932 store status through argument pointer STATUS. Note that it is
933 _NOT_ OK to throw_exception() out of target_wait() without popping
934 the debugging target from the stack; GDB isn't prepared to get back
935 to the prompt with a debugging target but without the frame cache,
936 stop_pc, etc., set up. OPTIONS is a bitwise OR of TARGET_W*
939 extern ptid_t target_wait (ptid_t ptid, struct target_waitstatus *status,
942 /* Fetch at least register REGNO, or all regs if regno == -1. No result. */
944 extern void target_fetch_registers (struct regcache *regcache, int regno);
946 /* Store at least register REGNO, or all regs if REGNO == -1.
947 It can store as many registers as it wants to, so target_prepare_to_store
948 must have been previously called. Calls error() if there are problems. */
950 extern void target_store_registers (struct regcache *regcache, int regs);
952 /* Get ready to modify the registers array. On machines which store
953 individual registers, this doesn't need to do anything. On machines
954 which store all the registers in one fell swoop, this makes sure
955 that REGISTERS contains all the registers from the program being
958 #define target_prepare_to_store(regcache) \
959 (*current_target.to_prepare_to_store) (regcache)
961 /* Determine current address space of thread PTID. */
963 struct address_space *target_thread_address_space (ptid_t);
965 /* Implement the "info proc" command. */
967 void target_info_proc (char *, enum info_proc_what);
969 /* Returns true if this target can debug multiple processes
972 #define target_supports_multi_process() \
973 (*current_target.to_supports_multi_process) ()
975 /* Returns true if this target can disable address space randomization. */
977 int target_supports_disable_randomization (void);
979 /* Returns true if this target can enable and disable tracepoints
980 while a trace experiment is running. */
982 #define target_supports_enable_disable_tracepoint() \
983 (*current_target.to_supports_enable_disable_tracepoint) ()
985 #define target_supports_string_tracing() \
986 (*current_target.to_supports_string_tracing) ()
988 /* Returns true if this target can handle breakpoint conditions
991 #define target_supports_evaluation_of_breakpoint_conditions() \
992 (*current_target.to_supports_evaluation_of_breakpoint_conditions) ()
994 /* Invalidate all target dcaches. */
995 extern void target_dcache_invalidate (void);
997 extern int target_read_string (CORE_ADDR, char **, int, int *);
999 extern int target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len);
1001 extern int target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, int len);
1003 extern int target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
1006 extern int target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
1009 /* Fetches the target's memory map. If one is found it is sorted
1010 and returned, after some consistency checking. Otherwise, NULL
1012 VEC(mem_region_s) *target_memory_map (void);
1014 /* Erase the specified flash region. */
1015 void target_flash_erase (ULONGEST address, LONGEST length);
1017 /* Finish a sequence of flash operations. */
1018 void target_flash_done (void);
1020 /* Describes a request for a memory write operation. */
1021 struct memory_write_request
1023 /* Begining address that must be written. */
1025 /* Past-the-end address. */
1027 /* The data to write. */
1029 /* A callback baton for progress reporting for this request. */
1032 typedef struct memory_write_request memory_write_request_s;
1033 DEF_VEC_O(memory_write_request_s);
1035 /* Enumeration specifying different flash preservation behaviour. */
1036 enum flash_preserve_mode
1042 /* Write several memory blocks at once. This version can be more
1043 efficient than making several calls to target_write_memory, in
1044 particular because it can optimize accesses to flash memory.
1046 Moreover, this is currently the only memory access function in gdb
1047 that supports writing to flash memory, and it should be used for
1048 all cases where access to flash memory is desirable.
1050 REQUESTS is the vector (see vec.h) of memory_write_request.
1051 PRESERVE_FLASH_P indicates what to do with blocks which must be
1052 erased, but not completely rewritten.
1053 PROGRESS_CB is a function that will be periodically called to provide
1054 feedback to user. It will be called with the baton corresponding
1055 to the request currently being written. It may also be called
1056 with a NULL baton, when preserved flash sectors are being rewritten.
1058 The function returns 0 on success, and error otherwise. */
1059 int target_write_memory_blocks (VEC(memory_write_request_s) *requests,
1060 enum flash_preserve_mode preserve_flash_p,
1061 void (*progress_cb) (ULONGEST, void *));
1063 /* From infrun.c. */
1065 extern int inferior_has_forked (ptid_t pid, ptid_t *child_pid);
1067 extern int inferior_has_vforked (ptid_t pid, ptid_t *child_pid);
1069 extern int inferior_has_execd (ptid_t pid, char **execd_pathname);
1071 extern int inferior_has_called_syscall (ptid_t pid, int *syscall_number);
1073 /* Print a line about the current target. */
1075 #define target_files_info() \
1076 (*current_target.to_files_info) (¤t_target)
1078 /* Insert a breakpoint at address BP_TGT->placed_address in the target
1079 machine. Result is 0 for success, or an errno value. */
1081 extern int target_insert_breakpoint (struct gdbarch *gdbarch,
1082 struct bp_target_info *bp_tgt);
1084 /* Remove a breakpoint at address BP_TGT->placed_address in the target
1085 machine. Result is 0 for success, or an errno value. */
1087 extern int target_remove_breakpoint (struct gdbarch *gdbarch,
1088 struct bp_target_info *bp_tgt);
1090 /* Initialize the terminal settings we record for the inferior,
1091 before we actually run the inferior. */
1093 #define target_terminal_init() \
1094 (*current_target.to_terminal_init) ()
1096 /* Put the inferior's terminal settings into effect.
1097 This is preparation for starting or resuming the inferior. */
1099 extern void target_terminal_inferior (void);
1101 /* Put some of our terminal settings into effect,
1102 enough to get proper results from our output,
1103 but do not change into or out of RAW mode
1104 so that no input is discarded.
1106 After doing this, either terminal_ours or terminal_inferior
1107 should be called to get back to a normal state of affairs. */
1109 #define target_terminal_ours_for_output() \
1110 (*current_target.to_terminal_ours_for_output) ()
1112 /* Put our terminal settings into effect.
1113 First record the inferior's terminal settings
1114 so they can be restored properly later. */
1116 #define target_terminal_ours() \
1117 (*current_target.to_terminal_ours) ()
1119 /* Save our terminal settings.
1120 This is called from TUI after entering or leaving the curses
1121 mode. Since curses modifies our terminal this call is here
1122 to take this change into account. */
1124 #define target_terminal_save_ours() \
1125 (*current_target.to_terminal_save_ours) ()
1127 /* Print useful information about our terminal status, if such a thing
1130 #define target_terminal_info(arg, from_tty) \
1131 (*current_target.to_terminal_info) (arg, from_tty)
1133 /* Kill the inferior process. Make it go away. */
1135 extern void target_kill (void);
1137 /* Load an executable file into the target process. This is expected
1138 to not only bring new code into the target process, but also to
1139 update GDB's symbol tables to match.
1141 ARG contains command-line arguments, to be broken down with
1142 buildargv (). The first non-switch argument is the filename to
1143 load, FILE; the second is a number (as parsed by strtoul (..., ...,
1144 0)), which is an offset to apply to the load addresses of FILE's
1145 sections. The target may define switches, or other non-switch
1146 arguments, as it pleases. */
1148 extern void target_load (char *arg, int from_tty);
1150 /* Start an inferior process and set inferior_ptid to its pid.
1151 EXEC_FILE is the file to run.
1152 ALLARGS is a string containing the arguments to the program.
1153 ENV is the environment vector to pass. Errors reported with error().
1154 On VxWorks and various standalone systems, we ignore exec_file. */
1156 void target_create_inferior (char *exec_file, char *args,
1157 char **env, int from_tty);
1159 /* Some targets (such as ttrace-based HPUX) don't allow us to request
1160 notification of inferior events such as fork and vork immediately
1161 after the inferior is created. (This because of how gdb gets an
1162 inferior created via invoking a shell to do it. In such a scenario,
1163 if the shell init file has commands in it, the shell will fork and
1164 exec for each of those commands, and we will see each such fork
1167 Such targets will supply an appropriate definition for this function. */
1169 #define target_post_startup_inferior(ptid) \
1170 (*current_target.to_post_startup_inferior) (ptid)
1172 /* On some targets, we can catch an inferior fork or vfork event when
1173 it occurs. These functions insert/remove an already-created
1174 catchpoint for such events. They return 0 for success, 1 if the
1175 catchpoint type is not supported and -1 for failure. */
1177 #define target_insert_fork_catchpoint(pid) \
1178 (*current_target.to_insert_fork_catchpoint) (pid)
1180 #define target_remove_fork_catchpoint(pid) \
1181 (*current_target.to_remove_fork_catchpoint) (pid)
1183 #define target_insert_vfork_catchpoint(pid) \
1184 (*current_target.to_insert_vfork_catchpoint) (pid)
1186 #define target_remove_vfork_catchpoint(pid) \
1187 (*current_target.to_remove_vfork_catchpoint) (pid)
1189 /* If the inferior forks or vforks, this function will be called at
1190 the next resume in order to perform any bookkeeping and fiddling
1191 necessary to continue debugging either the parent or child, as
1192 requested, and releasing the other. Information about the fork
1193 or vfork event is available via get_last_target_status ().
1194 This function returns 1 if the inferior should not be resumed
1195 (i.e. there is another event pending). */
1197 int target_follow_fork (int follow_child);
1199 /* On some targets, we can catch an inferior exec event when it
1200 occurs. These functions insert/remove an already-created
1201 catchpoint for such events. They return 0 for success, 1 if the
1202 catchpoint type is not supported and -1 for failure. */
1204 #define target_insert_exec_catchpoint(pid) \
1205 (*current_target.to_insert_exec_catchpoint) (pid)
1207 #define target_remove_exec_catchpoint(pid) \
1208 (*current_target.to_remove_exec_catchpoint) (pid)
1212 NEEDED is nonzero if any syscall catch (of any kind) is requested.
1213 If NEEDED is zero, it means the target can disable the mechanism to
1214 catch system calls because there are no more catchpoints of this type.
1216 ANY_COUNT is nonzero if a generic (filter-less) syscall catch is
1217 being requested. In this case, both TABLE_SIZE and TABLE should
1220 TABLE_SIZE is the number of elements in TABLE. It only matters if
1223 TABLE is an array of ints, indexed by syscall number. An element in
1224 this array is nonzero if that syscall should be caught. This argument
1225 only matters if ANY_COUNT is zero.
1227 Return 0 for success, 1 if syscall catchpoints are not supported or -1
1230 #define target_set_syscall_catchpoint(pid, needed, any_count, table_size, table) \
1231 (*current_target.to_set_syscall_catchpoint) (pid, needed, any_count, \
1234 /* Returns TRUE if PID has exited. And, also sets EXIT_STATUS to the
1235 exit code of PID, if any. */
1237 #define target_has_exited(pid,wait_status,exit_status) \
1238 (*current_target.to_has_exited) (pid,wait_status,exit_status)
1240 /* The debugger has completed a blocking wait() call. There is now
1241 some process event that must be processed. This function should
1242 be defined by those targets that require the debugger to perform
1243 cleanup or internal state changes in response to the process event. */
1245 /* The inferior process has died. Do what is right. */
1247 void target_mourn_inferior (void);
1249 /* Does target have enough data to do a run or attach command? */
1251 #define target_can_run(t) \
1252 ((t)->to_can_run) ()
1254 /* Set list of signals to be handled in the target.
1256 PASS_SIGNALS is an array of size NSIG, indexed by target signal number
1257 (enum target_signal). For every signal whose entry in this array is
1258 non-zero, the target is allowed -but not required- to skip reporting
1259 arrival of the signal to the GDB core by returning from target_wait,
1260 and to pass the signal directly to the inferior instead.
1262 However, if the target is hardware single-stepping a thread that is
1263 about to receive a signal, it needs to be reported in any case, even
1264 if mentioned in a previous target_pass_signals call. */
1266 extern void target_pass_signals (int nsig, unsigned char *pass_signals);
1268 /* Set list of signals the target may pass to the inferior. This
1269 directly maps to the "handle SIGNAL pass/nopass" setting.
1271 PROGRAM_SIGNALS is an array of size NSIG, indexed by target signal
1272 number (enum target_signal). For every signal whose entry in this
1273 array is non-zero, the target is allowed to pass the signal to the
1274 inferior. Signals not present in the array shall be silently
1275 discarded. This does not influence whether to pass signals to the
1276 inferior as a result of a target_resume call. This is useful in
1277 scenarios where the target needs to decide whether to pass or not a
1278 signal to the inferior without GDB core involvement, such as for
1279 example, when detaching (as threads may have been suspended with
1280 pending signals not reported to GDB). */
1282 extern void target_program_signals (int nsig, unsigned char *program_signals);
1284 /* Check to see if a thread is still alive. */
1286 extern int target_thread_alive (ptid_t ptid);
1288 /* Query for new threads and add them to the thread list. */
1290 extern void target_find_new_threads (void);
1292 /* Make target stop in a continuable fashion. (For instance, under
1293 Unix, this should act like SIGSTOP). This function is normally
1294 used by GUIs to implement a stop button. */
1296 extern void target_stop (ptid_t ptid);
1298 /* Send the specified COMMAND to the target's monitor
1299 (shell,interpreter) for execution. The result of the query is
1300 placed in OUTBUF. */
1302 #define target_rcmd(command, outbuf) \
1303 (*current_target.to_rcmd) (command, outbuf)
1306 /* Does the target include all of memory, or only part of it? This
1307 determines whether we look up the target chain for other parts of
1308 memory if this target can't satisfy a request. */
1310 extern int target_has_all_memory_1 (void);
1311 #define target_has_all_memory target_has_all_memory_1 ()
1313 /* Does the target include memory? (Dummy targets don't.) */
1315 extern int target_has_memory_1 (void);
1316 #define target_has_memory target_has_memory_1 ()
1318 /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until
1319 we start a process.) */
1321 extern int target_has_stack_1 (void);
1322 #define target_has_stack target_has_stack_1 ()
1324 /* Does the target have registers? (Exec files don't.) */
1326 extern int target_has_registers_1 (void);
1327 #define target_has_registers target_has_registers_1 ()
1329 /* Does the target have execution? Can we make it jump (through
1330 hoops), or pop its stack a few times? This means that the current
1331 target is currently executing; for some targets, that's the same as
1332 whether or not the target is capable of execution, but there are
1333 also targets which can be current while not executing. In that
1334 case this will become true after target_create_inferior or
1337 extern int target_has_execution_1 (ptid_t);
1339 /* Like target_has_execution_1, but always passes inferior_ptid. */
1341 extern int target_has_execution_current (void);
1343 #define target_has_execution target_has_execution_current ()
1345 /* Default implementations for process_stratum targets. Return true
1346 if there's a selected inferior, false otherwise. */
1348 extern int default_child_has_all_memory (struct target_ops *ops);
1349 extern int default_child_has_memory (struct target_ops *ops);
1350 extern int default_child_has_stack (struct target_ops *ops);
1351 extern int default_child_has_registers (struct target_ops *ops);
1352 extern int default_child_has_execution (struct target_ops *ops,
1355 /* Can the target support the debugger control of thread execution?
1356 Can it lock the thread scheduler? */
1358 #define target_can_lock_scheduler \
1359 (current_target.to_has_thread_control & tc_schedlock)
1361 /* Should the target enable async mode if it is supported? Temporary
1362 cludge until async mode is a strict superset of sync mode. */
1363 extern int target_async_permitted;
1365 /* Can the target support asynchronous execution? */
1366 #define target_can_async_p() (current_target.to_can_async_p ())
1368 /* Is the target in asynchronous execution mode? */
1369 #define target_is_async_p() (current_target.to_is_async_p ())
1371 int target_supports_non_stop (void);
1373 /* Put the target in async mode with the specified callback function. */
1374 #define target_async(CALLBACK,CONTEXT) \
1375 (current_target.to_async ((CALLBACK), (CONTEXT)))
1377 #define target_execution_direction() \
1378 (current_target.to_execution_direction ())
1380 /* Converts a process id to a string. Usually, the string just contains
1381 `process xyz', but on some systems it may contain
1382 `process xyz thread abc'. */
1384 extern char *target_pid_to_str (ptid_t ptid);
1386 extern char *normal_pid_to_str (ptid_t ptid);
1388 /* Return a short string describing extra information about PID,
1389 e.g. "sleeping", "runnable", "running on LWP 3". Null return value
1392 #define target_extra_thread_info(TP) \
1393 (current_target.to_extra_thread_info (TP))
1395 /* Return the thread's name. A NULL result means that the target
1396 could not determine this thread's name. */
1398 extern char *target_thread_name (struct thread_info *);
1400 /* Attempts to find the pathname of the executable file
1401 that was run to create a specified process.
1403 The process PID must be stopped when this operation is used.
1405 If the executable file cannot be determined, NULL is returned.
1407 Else, a pointer to a character string containing the pathname
1408 is returned. This string should be copied into a buffer by
1409 the client if the string will not be immediately used, or if
1412 #define target_pid_to_exec_file(pid) \
1413 (current_target.to_pid_to_exec_file) (pid)
1415 /* See the to_thread_architecture description in struct target_ops. */
1417 #define target_thread_architecture(ptid) \
1418 (current_target.to_thread_architecture (¤t_target, ptid))
1421 * Iterator function for target memory regions.
1422 * Calls a callback function once for each memory region 'mapped'
1423 * in the child process. Defined as a simple macro rather than
1424 * as a function macro so that it can be tested for nullity.
1427 #define target_find_memory_regions(FUNC, DATA) \
1428 (current_target.to_find_memory_regions) (FUNC, DATA)
1431 * Compose corefile .note section.
1434 #define target_make_corefile_notes(BFD, SIZE_P) \
1435 (current_target.to_make_corefile_notes) (BFD, SIZE_P)
1437 /* Bookmark interfaces. */
1438 #define target_get_bookmark(ARGS, FROM_TTY) \
1439 (current_target.to_get_bookmark) (ARGS, FROM_TTY)
1441 #define target_goto_bookmark(ARG, FROM_TTY) \
1442 (current_target.to_goto_bookmark) (ARG, FROM_TTY)
1444 /* Hardware watchpoint interfaces. */
1446 /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or
1447 write). Only the INFERIOR_PTID task is being queried. */
1449 #define target_stopped_by_watchpoint \
1450 (*current_target.to_stopped_by_watchpoint)
1452 /* Non-zero if we have steppable watchpoints */
1454 #define target_have_steppable_watchpoint \
1455 (current_target.to_have_steppable_watchpoint)
1457 /* Non-zero if we have continuable watchpoints */
1459 #define target_have_continuable_watchpoint \
1460 (current_target.to_have_continuable_watchpoint)
1462 /* Provide defaults for hardware watchpoint functions. */
1464 /* If the *_hw_beakpoint functions have not been defined
1465 elsewhere use the definitions in the target vector. */
1467 /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is
1468 one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or
1469 bp_hardware_breakpoint. CNT is the number of such watchpoints used so far
1470 (including this one?). OTHERTYPE is who knows what... */
1472 #define target_can_use_hardware_watchpoint(TYPE,CNT,OTHERTYPE) \
1473 (*current_target.to_can_use_hw_breakpoint) (TYPE, CNT, OTHERTYPE);
1475 /* Returns the number of debug registers needed to watch the given
1476 memory region, or zero if not supported. */
1478 #define target_region_ok_for_hw_watchpoint(addr, len) \
1479 (*current_target.to_region_ok_for_hw_watchpoint) (addr, len)
1482 /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes.
1483 TYPE is 0 for write, 1 for read, and 2 for read/write accesses.
1484 COND is the expression for its condition, or NULL if there's none.
1485 Returns 0 for success, 1 if the watchpoint type is not supported,
1488 #define target_insert_watchpoint(addr, len, type, cond) \
1489 (*current_target.to_insert_watchpoint) (addr, len, type, cond)
1491 #define target_remove_watchpoint(addr, len, type, cond) \
1492 (*current_target.to_remove_watchpoint) (addr, len, type, cond)
1494 /* Insert a new masked watchpoint at ADDR using the mask MASK.
1495 RW may be hw_read for a read watchpoint, hw_write for a write watchpoint
1496 or hw_access for an access watchpoint. Returns 0 for success, 1 if
1497 masked watchpoints are not supported, -1 for failure. */
1499 extern int target_insert_mask_watchpoint (CORE_ADDR, CORE_ADDR, int);
1501 /* Remove a masked watchpoint at ADDR with the mask MASK.
1502 RW may be hw_read for a read watchpoint, hw_write for a write watchpoint
1503 or hw_access for an access watchpoint. Returns 0 for success, non-zero
1506 extern int target_remove_mask_watchpoint (CORE_ADDR, CORE_ADDR, int);
1508 #define target_insert_hw_breakpoint(gdbarch, bp_tgt) \
1509 (*current_target.to_insert_hw_breakpoint) (gdbarch, bp_tgt)
1511 #define target_remove_hw_breakpoint(gdbarch, bp_tgt) \
1512 (*current_target.to_remove_hw_breakpoint) (gdbarch, bp_tgt)
1514 /* Return number of debug registers needed for a ranged breakpoint,
1515 or -1 if ranged breakpoints are not supported. */
1517 extern int target_ranged_break_num_registers (void);
1519 /* Return non-zero if target knows the data address which triggered this
1520 target_stopped_by_watchpoint, in such case place it to *ADDR_P. Only the
1521 INFERIOR_PTID task is being queried. */
1522 #define target_stopped_data_address(target, addr_p) \
1523 (*target.to_stopped_data_address) (target, addr_p)
1525 /* Return non-zero if ADDR is within the range of a watchpoint spanning
1526 LENGTH bytes beginning at START. */
1527 #define target_watchpoint_addr_within_range(target, addr, start, length) \
1528 (*target.to_watchpoint_addr_within_range) (target, addr, start, length)
1530 /* Return non-zero if the target is capable of using hardware to evaluate
1531 the condition expression. In this case, if the condition is false when
1532 the watched memory location changes, execution may continue without the
1533 debugger being notified.
1535 Due to limitations in the hardware implementation, it may be capable of
1536 avoiding triggering the watchpoint in some cases where the condition
1537 expression is false, but may report some false positives as well.
1538 For this reason, GDB will still evaluate the condition expression when
1539 the watchpoint triggers. */
1540 #define target_can_accel_watchpoint_condition(addr, len, type, cond) \
1541 (*current_target.to_can_accel_watchpoint_condition) (addr, len, type, cond)
1543 /* Return number of debug registers needed for a masked watchpoint,
1544 -1 if masked watchpoints are not supported or -2 if the given address
1545 and mask combination cannot be used. */
1547 extern int target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask);
1549 /* Target can execute in reverse? */
1550 #define target_can_execute_reverse \
1551 (current_target.to_can_execute_reverse ? \
1552 current_target.to_can_execute_reverse () : 0)
1554 extern const struct target_desc *target_read_description (struct target_ops *);
1556 #define target_get_ada_task_ptid(lwp, tid) \
1557 (*current_target.to_get_ada_task_ptid) (lwp,tid)
1559 /* Utility implementation of searching memory. */
1560 extern int simple_search_memory (struct target_ops* ops,
1561 CORE_ADDR start_addr,
1562 ULONGEST search_space_len,
1563 const gdb_byte *pattern,
1564 ULONGEST pattern_len,
1565 CORE_ADDR *found_addrp);
1567 /* Main entry point for searching memory. */
1568 extern int target_search_memory (CORE_ADDR start_addr,
1569 ULONGEST search_space_len,
1570 const gdb_byte *pattern,
1571 ULONGEST pattern_len,
1572 CORE_ADDR *found_addrp);
1574 /* Target file operations. */
1576 /* Open FILENAME on the target, using FLAGS and MODE. Return a
1577 target file descriptor, or -1 if an error occurs (and set
1579 extern int target_fileio_open (const char *filename, int flags, int mode,
1582 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
1583 Return the number of bytes written, or -1 if an error occurs
1584 (and set *TARGET_ERRNO). */
1585 extern int target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
1586 ULONGEST offset, int *target_errno);
1588 /* Read up to LEN bytes FD on the target into READ_BUF.
1589 Return the number of bytes read, or -1 if an error occurs
1590 (and set *TARGET_ERRNO). */
1591 extern int target_fileio_pread (int fd, gdb_byte *read_buf, int len,
1592 ULONGEST offset, int *target_errno);
1594 /* Close FD on the target. Return 0, or -1 if an error occurs
1595 (and set *TARGET_ERRNO). */
1596 extern int target_fileio_close (int fd, int *target_errno);
1598 /* Unlink FILENAME on the target. Return 0, or -1 if an error
1599 occurs (and set *TARGET_ERRNO). */
1600 extern int target_fileio_unlink (const char *filename, int *target_errno);
1602 /* Read value of symbolic link FILENAME on the target. Return a
1603 null-terminated string allocated via xmalloc, or NULL if an error
1604 occurs (and set *TARGET_ERRNO). */
1605 extern char *target_fileio_readlink (const char *filename, int *target_errno);
1607 /* Read target file FILENAME. The return value will be -1 if the transfer
1608 fails or is not supported; 0 if the object is empty; or the length
1609 of the object otherwise. If a positive value is returned, a
1610 sufficiently large buffer will be allocated using xmalloc and
1611 returned in *BUF_P containing the contents of the object.
1613 This method should be used for objects sufficiently small to store
1614 in a single xmalloc'd buffer, when no fixed bound on the object's
1615 size is known in advance. */
1616 extern LONGEST target_fileio_read_alloc (const char *filename,
1619 /* Read target file FILENAME. The result is NUL-terminated and
1620 returned as a string, allocated using xmalloc. If an error occurs
1621 or the transfer is unsupported, NULL is returned. Empty objects
1622 are returned as allocated but empty strings. A warning is issued
1623 if the result contains any embedded NUL bytes. */
1624 extern char *target_fileio_read_stralloc (const char *filename);
1627 /* Tracepoint-related operations. */
1629 #define target_trace_init() \
1630 (*current_target.to_trace_init) ()
1632 #define target_download_tracepoint(t) \
1633 (*current_target.to_download_tracepoint) (t)
1635 #define target_can_download_tracepoint() \
1636 (*current_target.to_can_download_tracepoint) ()
1638 #define target_download_trace_state_variable(tsv) \
1639 (*current_target.to_download_trace_state_variable) (tsv)
1641 #define target_enable_tracepoint(loc) \
1642 (*current_target.to_enable_tracepoint) (loc)
1644 #define target_disable_tracepoint(loc) \
1645 (*current_target.to_disable_tracepoint) (loc)
1647 #define target_trace_start() \
1648 (*current_target.to_trace_start) ()
1650 #define target_trace_set_readonly_regions() \
1651 (*current_target.to_trace_set_readonly_regions) ()
1653 #define target_get_trace_status(ts) \
1654 (*current_target.to_get_trace_status) (ts)
1656 #define target_get_tracepoint_status(tp,utp) \
1657 (*current_target.to_get_tracepoint_status) (tp, utp)
1659 #define target_trace_stop() \
1660 (*current_target.to_trace_stop) ()
1662 #define target_trace_find(type,num,addr1,addr2,tpp) \
1663 (*current_target.to_trace_find) ((type), (num), (addr1), (addr2), (tpp))
1665 #define target_get_trace_state_variable_value(tsv,val) \
1666 (*current_target.to_get_trace_state_variable_value) ((tsv), (val))
1668 #define target_save_trace_data(filename) \
1669 (*current_target.to_save_trace_data) (filename)
1671 #define target_upload_tracepoints(utpp) \
1672 (*current_target.to_upload_tracepoints) (utpp)
1674 #define target_upload_trace_state_variables(utsvp) \
1675 (*current_target.to_upload_trace_state_variables) (utsvp)
1677 #define target_get_raw_trace_data(buf,offset,len) \
1678 (*current_target.to_get_raw_trace_data) ((buf), (offset), (len))
1680 #define target_get_min_fast_tracepoint_insn_len() \
1681 (*current_target.to_get_min_fast_tracepoint_insn_len) ()
1683 #define target_set_disconnected_tracing(val) \
1684 (*current_target.to_set_disconnected_tracing) (val)
1686 #define target_set_circular_trace_buffer(val) \
1687 (*current_target.to_set_circular_trace_buffer) (val)
1689 #define target_set_trace_notes(user,notes,stopnotes) \
1690 (*current_target.to_set_trace_notes) ((user), (notes), (stopnotes))
1692 #define target_get_tib_address(ptid, addr) \
1693 (*current_target.to_get_tib_address) ((ptid), (addr))
1695 #define target_set_permissions() \
1696 (*current_target.to_set_permissions) ()
1698 #define target_static_tracepoint_marker_at(addr, marker) \
1699 (*current_target.to_static_tracepoint_marker_at) (addr, marker)
1701 #define target_static_tracepoint_markers_by_strid(marker_id) \
1702 (*current_target.to_static_tracepoint_markers_by_strid) (marker_id)
1704 #define target_traceframe_info() \
1705 (*current_target.to_traceframe_info) ()
1707 #define target_use_agent(use) \
1708 (*current_target.to_use_agent) (use)
1710 #define target_can_use_agent() \
1711 (*current_target.to_can_use_agent) ()
1713 /* Command logging facility. */
1715 #define target_log_command(p) \
1717 if (current_target.to_log_command) \
1718 (*current_target.to_log_command) (p); \
1722 extern int target_core_of_thread (ptid_t ptid);
1724 /* Verify that the memory in the [MEMADDR, MEMADDR+SIZE) range matches
1725 the contents of [DATA,DATA+SIZE). Returns 1 if there's a match, 0
1726 if there's a mismatch, and -1 if an error is encountered while
1727 reading memory. Throws an error if the functionality is found not
1728 to be supported by the current target. */
1729 int target_verify_memory (const gdb_byte *data,
1730 CORE_ADDR memaddr, ULONGEST size);
1732 /* Routines for maintenance of the target structures...
1734 add_target: Add a target to the list of all possible targets.
1736 push_target: Make this target the top of the stack of currently used
1737 targets, within its particular stratum of the stack. Result
1738 is 0 if now atop the stack, nonzero if not on top (maybe
1741 unpush_target: Remove this from the stack of currently used targets,
1742 no matter where it is on the list. Returns 0 if no
1743 change, 1 if removed from stack.
1745 pop_target: Remove the top thing on the stack of current targets. */
1747 extern void add_target (struct target_ops *);
1749 extern void push_target (struct target_ops *);
1751 extern int unpush_target (struct target_ops *);
1753 extern void target_pre_inferior (int);
1755 extern void target_preopen (int);
1757 extern void pop_target (void);
1759 /* Does whatever cleanup is required to get rid of all pushed targets.
1760 QUITTING is propagated to target_close; it indicates that GDB is
1761 exiting and should not get hung on an error (otherwise it is
1762 important to perform clean termination, even if it takes a
1764 extern void pop_all_targets (int quitting);
1766 /* Like pop_all_targets, but pops only targets whose stratum is
1767 strictly above ABOVE_STRATUM. */
1768 extern void pop_all_targets_above (enum strata above_stratum, int quitting);
1770 extern int target_is_pushed (struct target_ops *t);
1772 extern CORE_ADDR target_translate_tls_address (struct objfile *objfile,
1775 /* Struct target_section maps address ranges to file sections. It is
1776 mostly used with BFD files, but can be used without (e.g. for handling
1777 raw disks, or files not in formats handled by BFD). */
1779 struct target_section
1781 CORE_ADDR addr; /* Lowest address in section */
1782 CORE_ADDR endaddr; /* 1+highest address in section */
1784 struct bfd_section *the_bfd_section;
1786 bfd *bfd; /* BFD file pointer */
1789 /* Holds an array of target sections. Defined by [SECTIONS..SECTIONS_END[. */
1791 struct target_section_table
1793 struct target_section *sections;
1794 struct target_section *sections_end;
1797 /* Return the "section" containing the specified address. */
1798 struct target_section *target_section_by_addr (struct target_ops *target,
1801 /* Return the target section table this target (or the targets
1802 beneath) currently manipulate. */
1804 extern struct target_section_table *target_get_section_table
1805 (struct target_ops *target);
1807 /* From mem-break.c */
1809 extern int memory_remove_breakpoint (struct gdbarch *,
1810 struct bp_target_info *);
1812 extern int memory_insert_breakpoint (struct gdbarch *,
1813 struct bp_target_info *);
1815 extern int default_memory_remove_breakpoint (struct gdbarch *,
1816 struct bp_target_info *);
1818 extern int default_memory_insert_breakpoint (struct gdbarch *,
1819 struct bp_target_info *);
1824 extern void initialize_targets (void);
1826 extern void noprocess (void) ATTRIBUTE_NORETURN;
1828 extern void target_require_runnable (void);
1830 extern void find_default_attach (struct target_ops *, char *, int);
1832 extern void find_default_create_inferior (struct target_ops *,
1833 char *, char *, char **, int);
1835 extern struct target_ops *find_run_target (void);
1837 extern struct target_ops *find_target_beneath (struct target_ops *);
1839 /* Read OS data object of type TYPE from the target, and return it in
1840 XML format. The result is NUL-terminated and returned as a string,
1841 allocated using xmalloc. If an error occurs or the transfer is
1842 unsupported, NULL is returned. Empty objects are returned as
1843 allocated but empty strings. */
1845 extern char *target_get_osdata (const char *type);
1848 /* Stuff that should be shared among the various remote targets. */
1850 /* Debugging level. 0 is off, and non-zero values mean to print some debug
1851 information (higher values, more information). */
1852 extern int remote_debug;
1854 /* Speed in bits per second, or -1 which means don't mess with the speed. */
1855 extern int baud_rate;
1856 /* Timeout limit for response from target. */
1857 extern int remote_timeout;
1860 /* Functions for helping to write a native target. */
1862 /* This is for native targets which use a unix/POSIX-style waitstatus. */
1863 extern void store_waitstatus (struct target_waitstatus *, int);
1865 /* Set the show memory breakpoints mode to show, and installs a cleanup
1866 to restore it back to the current value. */
1867 extern struct cleanup *make_show_memory_breakpoints_cleanup (int show);
1869 extern int may_write_registers;
1870 extern int may_write_memory;
1871 extern int may_insert_breakpoints;
1872 extern int may_insert_tracepoints;
1873 extern int may_insert_fast_tracepoints;
1874 extern int may_stop;
1876 extern void update_target_permissions (void);
1879 /* Imported from machine dependent code. */
1881 /* Blank target vector entries are initialized to target_ignore. */
1882 void target_ignore (void);
1884 #endif /* !defined (TARGET_H) */