1 /* Interface between GDB and target environments, including files and processes
2 Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
3 Contributed by Cygnus Support. Written by John Gilmore.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 #if !defined (TARGET_H)
24 /* This include file defines the interface between the main part
25 of the debugger, and the part which is target-specific, or
26 specific to the communications interface between us and the
29 A TARGET is an interface between the debugger and a particular
30 kind of file or process. Targets can be STACKED in STRATA,
31 so that more than one target can potentially respond to a request.
32 In particular, memory accesses will walk down the stack of targets
33 until they find a target that is interested in handling that particular
34 address. STRATA are artificial boundaries on the stack, within
35 which particular kinds of targets live. Strata exist so that
36 people don't get confused by pushing e.g. a process target and then
37 a file target, and wondering why they can't see the current values
38 of variables any more (the file target is handling them and they
39 never get to the process target). So when you push a file target,
40 it goes into the file stratum, which is always below the process
46 dummy_stratum
, /* The lowest of the low */
47 file_stratum
, /* Executable files, etc */
48 core_stratum
, /* Core dump files */
49 download_stratum
, /* Downloading of remote targets */
50 process_stratum
/* Executing processes */
53 /* Stuff for target_wait. */
55 /* Generally, what has the program done? */
56 enum target_waitkind
{
57 /* The program has exited. The exit status is in value.integer. */
58 TARGET_WAITKIND_EXITED
,
60 /* The program has stopped with a signal. Which signal is in value.sig. */
61 TARGET_WAITKIND_STOPPED
,
63 /* The program has terminated with a signal. Which signal is in
65 TARGET_WAITKIND_SIGNALLED
,
67 /* The program is letting us know that it dynamically loaded something
68 (e.g. it called load(2) on AIX). */
69 TARGET_WAITKIND_LOADED
,
71 /* Nothing happened, but we stopped anyway. This perhaps should be handled
72 within target_wait, but I'm not sure target_wait should be resuming the
74 TARGET_WAITKIND_SPURIOUS
77 /* The numbering of these signals is chosen to match traditional unix
78 signals (insofar as various unices use the same numbers, anyway).
79 It is also the numbering of the GDB remote protocol. Other remote
80 protocols, if they use a different numbering, should make sure to
81 translate appropriately. */
83 /* This is based strongly on Unix/POSIX signals for several reasons:
84 (1) This set of signals represents a widely-accepted attempt to
85 represent events of this sort in a portable fashion, (2) we want a
86 signal to make it from wait to child_wait to the user intact, (3) many
87 remote protocols use a similar encoding. However, it is
88 recognized that this set of signals has limitations (such as not
89 distinguishing between various kinds of SIGSEGV, or not
90 distinguishing hitting a breakpoint from finishing a single step).
91 So in the future we may get around this either by adding additional
92 signals for breakpoint, single-step, etc., or by adding signal
93 codes; the latter seems more in the spirit of what BSD, System V,
94 etc. are doing to address these issues. */
96 /* For an explanation of what each signal means, see
97 target_signal_to_string. */
100 /* Used some places (e.g. stop_signal) to record the concept that
101 there is no signal. */
103 TARGET_SIGNAL_FIRST
= 0,
104 TARGET_SIGNAL_HUP
= 1,
105 TARGET_SIGNAL_INT
= 2,
106 TARGET_SIGNAL_QUIT
= 3,
107 TARGET_SIGNAL_ILL
= 4,
108 TARGET_SIGNAL_TRAP
= 5,
109 TARGET_SIGNAL_ABRT
= 6,
110 TARGET_SIGNAL_EMT
= 7,
111 TARGET_SIGNAL_FPE
= 8,
112 TARGET_SIGNAL_KILL
= 9,
113 TARGET_SIGNAL_BUS
= 10,
114 TARGET_SIGNAL_SEGV
= 11,
115 TARGET_SIGNAL_SYS
= 12,
116 TARGET_SIGNAL_PIPE
= 13,
117 TARGET_SIGNAL_ALRM
= 14,
118 TARGET_SIGNAL_TERM
= 15,
119 TARGET_SIGNAL_URG
= 16,
120 TARGET_SIGNAL_STOP
= 17,
121 TARGET_SIGNAL_TSTP
= 18,
122 TARGET_SIGNAL_CONT
= 19,
123 TARGET_SIGNAL_CHLD
= 20,
124 TARGET_SIGNAL_TTIN
= 21,
125 TARGET_SIGNAL_TTOU
= 22,
126 TARGET_SIGNAL_IO
= 23,
127 TARGET_SIGNAL_XCPU
= 24,
128 TARGET_SIGNAL_XFSZ
= 25,
129 TARGET_SIGNAL_VTALRM
= 26,
130 TARGET_SIGNAL_PROF
= 27,
131 TARGET_SIGNAL_WINCH
= 28,
132 TARGET_SIGNAL_LOST
= 29,
133 TARGET_SIGNAL_USR1
= 30,
134 TARGET_SIGNAL_USR2
= 31,
135 TARGET_SIGNAL_PWR
= 32,
136 /* Similar to SIGIO. Perhaps they should have the same number. */
137 TARGET_SIGNAL_POLL
= 33,
138 TARGET_SIGNAL_WIND
= 34,
139 TARGET_SIGNAL_PHONE
= 35,
140 TARGET_SIGNAL_WAITING
= 36,
141 TARGET_SIGNAL_LWP
= 37,
142 TARGET_SIGNAL_DANGER
= 38,
143 TARGET_SIGNAL_GRANT
= 39,
144 TARGET_SIGNAL_RETRACT
= 40,
145 TARGET_SIGNAL_MSG
= 41,
146 TARGET_SIGNAL_SOUND
= 42,
147 TARGET_SIGNAL_SAK
= 43,
148 TARGET_SIGNAL_PRIO
= 44,
149 TARGET_SIGNAL_REALTIME_33
= 45,
150 TARGET_SIGNAL_REALTIME_34
= 46,
151 TARGET_SIGNAL_REALTIME_35
= 47,
152 TARGET_SIGNAL_REALTIME_36
= 48,
153 TARGET_SIGNAL_REALTIME_37
= 49,
154 TARGET_SIGNAL_REALTIME_38
= 50,
155 TARGET_SIGNAL_REALTIME_39
= 51,
156 TARGET_SIGNAL_REALTIME_40
= 52,
157 TARGET_SIGNAL_REALTIME_41
= 53,
158 TARGET_SIGNAL_REALTIME_42
= 54,
159 TARGET_SIGNAL_REALTIME_43
= 55,
160 TARGET_SIGNAL_REALTIME_44
= 56,
161 TARGET_SIGNAL_REALTIME_45
= 57,
162 TARGET_SIGNAL_REALTIME_46
= 58,
163 TARGET_SIGNAL_REALTIME_47
= 59,
164 TARGET_SIGNAL_REALTIME_48
= 60,
165 TARGET_SIGNAL_REALTIME_49
= 61,
166 TARGET_SIGNAL_REALTIME_50
= 62,
167 TARGET_SIGNAL_REALTIME_51
= 63,
168 TARGET_SIGNAL_REALTIME_52
= 64,
169 TARGET_SIGNAL_REALTIME_53
= 65,
170 TARGET_SIGNAL_REALTIME_54
= 66,
171 TARGET_SIGNAL_REALTIME_55
= 67,
172 TARGET_SIGNAL_REALTIME_56
= 68,
173 TARGET_SIGNAL_REALTIME_57
= 69,
174 TARGET_SIGNAL_REALTIME_58
= 70,
175 TARGET_SIGNAL_REALTIME_59
= 71,
176 TARGET_SIGNAL_REALTIME_60
= 72,
177 TARGET_SIGNAL_REALTIME_61
= 73,
178 TARGET_SIGNAL_REALTIME_62
= 74,
179 TARGET_SIGNAL_REALTIME_63
= 75,
181 /* Some signal we don't know about. */
182 TARGET_SIGNAL_UNKNOWN
,
184 /* Use whatever signal we use when one is not specifically specified
185 (for passing to proceed and so on). */
186 TARGET_SIGNAL_DEFAULT
,
188 /* Last and unused enum value, for sizing arrays, etc. */
192 struct target_waitstatus
{
193 enum target_waitkind kind
;
195 /* Exit status or signal number. */
198 enum target_signal sig
;
202 /* Return the string for a signal. */
203 extern char *target_signal_to_string
PARAMS ((enum target_signal
));
205 /* Return the name (SIGHUP, etc.) for a signal. */
206 extern char *target_signal_to_name
PARAMS ((enum target_signal
));
208 /* Given a name (SIGHUP, etc.), return its signal. */
209 enum target_signal target_signal_from_name
PARAMS ((char *));
211 /* If certain kinds of activity happen, target_wait should perform
213 /* Right now we just call (*TARGET_ACTIVITY_FUNCTION) if I/O is possible
214 on TARGET_ACTIVITY_FD. */
215 extern int target_activity_fd
;
216 /* Returns zero to leave the inferior alone, one to interrupt it. */
217 extern int (*target_activity_function
) PARAMS ((void));
221 char *to_shortname
; /* Name this target type */
222 char *to_longname
; /* Name for printing */
223 char *to_doc
; /* Documentation. Does not include trailing
224 newline, and starts with a one-line descrip-
225 tion (probably similar to to_longname). */
226 void (*to_open
) PARAMS ((char *, int));
227 void (*to_close
) PARAMS ((int));
228 void (*to_attach
) PARAMS ((char *, int));
229 void (*to_detach
) PARAMS ((char *, int));
230 void (*to_resume
) PARAMS ((int, int, enum target_signal
));
231 int (*to_wait
) PARAMS ((int, struct target_waitstatus
*));
232 void (*to_fetch_registers
) PARAMS ((int));
233 void (*to_store_registers
) PARAMS ((int));
234 void (*to_prepare_to_store
) PARAMS ((void));
236 /* Transfer LEN bytes of memory between GDB address MYADDR and
237 target address MEMADDR. If WRITE, transfer them to the target, else
238 transfer them from the target. TARGET is the target from which we
241 Return value, N, is one of the following:
243 0 means that we can't handle this. If errno has been set, it is the
244 error which prevented us from doing it (FIXME: What about bfd_error?).
246 positive (call it N) means that we have transferred N bytes
247 starting at MEMADDR. We might be able to handle more bytes
248 beyond this length, but no promises.
250 negative (call its absolute value N) means that we cannot
251 transfer right at MEMADDR, but we could transfer at least
252 something at MEMADDR + N. */
254 int (*to_xfer_memory
) PARAMS ((CORE_ADDR memaddr
, char *myaddr
,
256 struct target_ops
* target
));
259 /* Enable this after 4.12. */
261 /* Search target memory. Start at STARTADDR and take LEN bytes of
262 target memory, and them with MASK, and compare to DATA. If they
263 match, set *ADDR_FOUND to the address we found it at, store the data
264 we found at LEN bytes starting at DATA_FOUND, and return. If
265 not, add INCREMENT to the search address and keep trying until
266 the search address is outside of the range [LORANGE,HIRANGE).
268 If we don't find anything, set *ADDR_FOUND to (CORE_ADDR)0 and return. */
269 void (*to_search
) PARAMS ((int len
, char *data
, char *mask
,
270 CORE_ADDR startaddr
, int increment
,
271 CORE_ADDR lorange
, CORE_ADDR hirange
,
272 CORE_ADDR
*addr_found
, char *data_found
));
274 #define target_search(len, data, mask, startaddr, increment, lorange, hirange, addr_found, data_found) \
275 (*current_target.to_search) (len, data, mask, startaddr, increment, \
276 lorange, hirange, addr_found, data_found)
279 void (*to_files_info
) PARAMS ((struct target_ops
*));
280 int (*to_insert_breakpoint
) PARAMS ((CORE_ADDR
, char *));
281 int (*to_remove_breakpoint
) PARAMS ((CORE_ADDR
, char *));
282 void (*to_terminal_init
) PARAMS ((void));
283 void (*to_terminal_inferior
) PARAMS ((void));
284 void (*to_terminal_ours_for_output
) PARAMS ((void));
285 void (*to_terminal_ours
) PARAMS ((void));
286 void (*to_terminal_info
) PARAMS ((char *, int));
287 void (*to_kill
) PARAMS ((void));
288 void (*to_load
) PARAMS ((char *, int));
289 int (*to_lookup_symbol
) PARAMS ((char *, CORE_ADDR
*));
290 void (*to_create_inferior
) PARAMS ((char *, char *, char **));
291 void (*to_mourn_inferior
) PARAMS ((void));
292 int (*to_can_run
) PARAMS ((void));
293 void (*to_notice_signals
) PARAMS ((int pid
));
294 int (*to_thread_alive
) PARAMS ((int pid
));
295 void (*to_stop
) PARAMS ((void));
296 enum strata to_stratum
;
298 *DONT_USE
; /* formerly to_next */
299 int to_has_all_memory
;
302 int to_has_registers
;
303 int to_has_execution
;
309 /* Need sub-structure for target machine related rather than comm related? */
312 /* Magic number for checking ops size. If a struct doesn't end with this
313 number, somebody changed the declaration but didn't change all the
314 places that initialize one. */
316 #define OPS_MAGIC 3840
318 /* The ops structure for our "current" target process. This should
319 never be NULL. If there is no target, it points to the dummy_target. */
321 extern struct target_ops current_target
;
323 /* An item on the target stack. */
325 struct target_stack_item
327 struct target_stack_item
*next
;
328 struct target_ops
*target_ops
;
331 /* The target stack. */
333 extern struct target_stack_item
*target_stack
;
335 /* Define easy words for doing these operations on our current target. */
337 #define target_shortname (current_target.to_shortname)
338 #define target_longname (current_target.to_longname)
340 /* The open routine takes the rest of the parameters from the command,
341 and (if successful) pushes a new target onto the stack.
342 Targets should supply this routine, if only to provide an error message. */
343 #define target_open(name, from_tty) \
344 (*current_target.to_open) (name, from_tty)
346 /* Does whatever cleanup is required for a target that we are no longer
347 going to be calling. Argument says whether we are quitting gdb and
348 should not get hung in case of errors, or whether we want a clean
349 termination even if it takes a while. This routine is automatically
350 always called just before a routine is popped off the target stack.
351 Closing file descriptors and freeing memory are typical things it should
354 #define target_close(quitting) \
355 (*current_target.to_close) (quitting)
357 /* Attaches to a process on the target side. Arguments are as passed
358 to the `attach' command by the user. This routine can be called
359 when the target is not on the target-stack, if the target_can_run
360 routine returns 1; in that case, it must push itself onto the stack.
361 Upon exit, the target should be ready for normal operations, and
362 should be ready to deliver the status of the process immediately
363 (without waiting) to an upcoming target_wait call. */
365 #define target_attach(args, from_tty) \
366 (*current_target.to_attach) (args, from_tty)
368 /* Takes a program previously attached to and detaches it.
369 The program may resume execution (some targets do, some don't) and will
370 no longer stop on signals, etc. We better not have left any breakpoints
371 in the program or it'll die when it hits one. ARGS is arguments
372 typed by the user (e.g. a signal to send the process). FROM_TTY
373 says whether to be verbose or not. */
376 target_detach
PARAMS ((char *, int));
378 /* Resume execution of the target process PID. STEP says whether to
379 single-step or to run free; SIGGNAL is the signal to be given to
380 the target, or TARGET_SIGNAL_0 for no signal. The caller may not
381 pass TARGET_SIGNAL_DEFAULT. */
383 #define target_resume(pid, step, siggnal) \
384 (*current_target.to_resume) (pid, step, siggnal)
386 /* Wait for process pid to do something. Pid = -1 to wait for any pid
387 to do something. Return pid of child, or -1 in case of error;
388 store status through argument pointer STATUS. Note that it is
389 *not* OK to return_to_top_level out of target_wait without popping
390 the debugging target from the stack; GDB isn't prepared to get back
391 to the prompt with a debugging target but without the frame cache,
392 stop_pc, etc., set up. */
394 #define target_wait(pid, status) \
395 (*current_target.to_wait) (pid, status)
397 /* Fetch register REGNO, or all regs if regno == -1. No result. */
399 #define target_fetch_registers(regno) \
400 (*current_target.to_fetch_registers) (regno)
402 /* Store at least register REGNO, or all regs if REGNO == -1.
403 It can store as many registers as it wants to, so target_prepare_to_store
404 must have been previously called. Calls error() if there are problems. */
406 #define target_store_registers(regs) \
407 (*current_target.to_store_registers) (regs)
409 /* Get ready to modify the registers array. On machines which store
410 individual registers, this doesn't need to do anything. On machines
411 which store all the registers in one fell swoop, this makes sure
412 that REGISTERS contains all the registers from the program being
415 #define target_prepare_to_store() \
416 (*current_target.to_prepare_to_store) ()
418 extern int target_read_string
PARAMS ((CORE_ADDR
, char **, int, int *));
421 target_read_memory
PARAMS ((CORE_ADDR
, char *, int));
424 target_read_memory_partial
PARAMS ((CORE_ADDR
, char *, int, int *));
427 target_write_memory
PARAMS ((CORE_ADDR
, char *, int));
430 xfer_memory
PARAMS ((CORE_ADDR
, char *, int, int, struct target_ops
*));
433 child_xfer_memory
PARAMS ((CORE_ADDR
, char *, int, int, struct target_ops
*));
435 /* Transfer LEN bytes between target address MEMADDR and GDB address MYADDR.
436 Returns 0 for success, errno code for failure (which includes partial
437 transfers--if you want a more useful response to partial transfers, try
438 target_read_memory_partial). */
440 extern int target_xfer_memory
PARAMS ((CORE_ADDR memaddr
, char *myaddr
,
441 int len
, int write
));
446 print_section_info
PARAMS ((struct target_ops
*, bfd
*));
448 /* Print a line about the current target. */
450 #define target_files_info() \
451 (*current_target.to_files_info) (¤t_target)
453 /* Insert a breakpoint at address ADDR in the target machine.
454 SAVE is a pointer to memory allocated for saving the
455 target contents. It is guaranteed by the caller to be long enough
456 to save "sizeof BREAKPOINT" bytes. Result is 0 for success, or
459 #define target_insert_breakpoint(addr, save) \
460 (*current_target.to_insert_breakpoint) (addr, save)
462 /* Remove a breakpoint at address ADDR in the target machine.
463 SAVE is a pointer to the same save area
464 that was previously passed to target_insert_breakpoint.
465 Result is 0 for success, or an errno value. */
467 #define target_remove_breakpoint(addr, save) \
468 (*current_target.to_remove_breakpoint) (addr, save)
470 /* Initialize the terminal settings we record for the inferior,
471 before we actually run the inferior. */
473 #define target_terminal_init() \
474 (*current_target.to_terminal_init) ()
476 /* Put the inferior's terminal settings into effect.
477 This is preparation for starting or resuming the inferior. */
479 #define target_terminal_inferior() \
480 (*current_target.to_terminal_inferior) ()
482 /* Put some of our terminal settings into effect,
483 enough to get proper results from our output,
484 but do not change into or out of RAW mode
485 so that no input is discarded.
487 After doing this, either terminal_ours or terminal_inferior
488 should be called to get back to a normal state of affairs. */
490 #define target_terminal_ours_for_output() \
491 (*current_target.to_terminal_ours_for_output) ()
493 /* Put our terminal settings into effect.
494 First record the inferior's terminal settings
495 so they can be restored properly later. */
497 #define target_terminal_ours() \
498 (*current_target.to_terminal_ours) ()
500 /* Print useful information about our terminal status, if such a thing
503 #define target_terminal_info(arg, from_tty) \
504 (*current_target.to_terminal_info) (arg, from_tty)
506 /* Kill the inferior process. Make it go away. */
508 #define target_kill() \
509 (*current_target.to_kill) ()
511 /* Load an executable file into the target process. This is expected to
512 not only bring new code into the target process, but also to update
513 GDB's symbol tables to match. */
515 #define target_load(arg, from_tty) \
516 (*current_target.to_load) (arg, from_tty)
518 /* Look up a symbol in the target's symbol table. NAME is the symbol
519 name. ADDRP is a CORE_ADDR * pointing to where the value of the symbol
520 should be returned. The result is 0 if successful, nonzero if the
521 symbol does not exist in the target environment. This function should
522 not call error() if communication with the target is interrupted, since
523 it is called from symbol reading, but should return nonzero, possibly
524 doing a complain(). */
526 #define target_lookup_symbol(name, addrp) \
527 (*current_target.to_lookup_symbol) (name, addrp)
529 /* Start an inferior process and set inferior_pid to its pid.
530 EXEC_FILE is the file to run.
531 ALLARGS is a string containing the arguments to the program.
532 ENV is the environment vector to pass. Errors reported with error().
533 On VxWorks and various standalone systems, we ignore exec_file. */
535 #define target_create_inferior(exec_file, args, env) \
536 (*current_target.to_create_inferior) (exec_file, args, env)
538 /* The inferior process has died. Do what is right. */
540 #define target_mourn_inferior() \
541 (*current_target.to_mourn_inferior) ()
543 /* Does target have enough data to do a run or attach command? */
545 #define target_can_run(t) \
548 /* post process changes to signal handling in the inferior. */
550 #define target_notice_signals(pid) \
551 (*current_target.to_notice_signals) (pid)
553 /* Check to see if a thread is still alive. */
555 #define target_thread_alive(pid) \
556 (*current_target.to_thread_alive) (pid)
558 /* Make target stop in a continuable fashion. (For instance, under Unix, this
559 should act like SIGSTOP). This function is normally used by GUIs to
560 implement a stop button. */
562 #define target_stop() current_target.to_stop ()
564 /* Pointer to next target in the chain, e.g. a core file and an exec file. */
566 #define target_next \
567 (current_target.to_next)
569 /* Does the target include all of memory, or only part of it? This
570 determines whether we look up the target chain for other parts of
571 memory if this target can't satisfy a request. */
573 #define target_has_all_memory \
574 (current_target.to_has_all_memory)
576 /* Does the target include memory? (Dummy targets don't.) */
578 #define target_has_memory \
579 (current_target.to_has_memory)
581 /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until
582 we start a process.) */
584 #define target_has_stack \
585 (current_target.to_has_stack)
587 /* Does the target have registers? (Exec files don't.) */
589 #define target_has_registers \
590 (current_target.to_has_registers)
592 /* Does the target have execution? Can we make it jump (through
593 hoops), or pop its stack a few times? FIXME: If this is to work that
594 way, it needs to check whether an inferior actually exists.
595 remote-udi.c and probably other targets can be the current target
596 when the inferior doesn't actually exist at the moment. Right now
597 this just tells us whether this target is *capable* of execution. */
599 #define target_has_execution \
600 (current_target.to_has_execution)
602 extern void target_link
PARAMS ((char *, CORE_ADDR
*));
604 /* Converts a process id to a string. Usually, the string just contains
605 `process xyz', but on some systems it may contain
606 `process xyz thread abc'. */
608 #ifndef target_pid_to_str
609 #define target_pid_to_str(PID) \
610 normal_pid_to_str (PID)
611 extern char *normal_pid_to_str
PARAMS ((int pid
));
614 #ifndef target_new_objfile
615 #define target_new_objfile(OBJFILE)
618 /* Hook to call target-dependant code after reading in a new symbol table. */
620 #ifndef TARGET_SYMFILE_POSTREAD
621 #define TARGET_SYMFILE_POSTREAD(OBJFILE)
624 /* Hook to call target dependant code just after inferior target process has
627 #ifndef TARGET_CREATE_INFERIOR_HOOK
628 #define TARGET_CREATE_INFERIOR_HOOK(PID)
631 /* Hardware watchpoint interfaces. */
633 /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or
636 #ifndef STOPPED_BY_WATCHPOINT
637 #define STOPPED_BY_WATCHPOINT(w) 0
640 /* Provide defaults for systems that don't support hardware watchpoints. */
642 #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS
644 /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is
645 one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or
646 bp_hardware_breakpoint. CNT is the number of such watchpoints used so far
647 (including this one?). OTHERTYPE is who knows what... */
649 #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(TYPE,CNT,OTHERTYPE) 0
651 /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes. TYPE is 1
652 for read and 2 for read/write accesses. Returns 0 for success, non-zero for
655 #define target_remove_watchpoint(ADDR,LEN,TYPE) -1
656 #define target_insert_watchpoint(ADDR,LEN,TYPE) -1
658 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
660 #ifndef target_insert_hw_breakpoint
661 #define target_remove_hw_breakpoint(ADDR,SHADOW) -1
662 #define target_insert_hw_breakpoint(ADDR,SHADOW) -1
665 #ifndef target_stopped_data_address
666 #define target_stopped_data_address() 0
669 /* If defined, then we need to decr pc by this much after a hardware break-
670 point. Presumably this overrides DECR_PC_AFTER_BREAK... */
672 #ifndef DECR_PC_AFTER_HW_BREAK
673 #define DECR_PC_AFTER_HW_BREAK 0
676 /* Routines for maintenance of the target structures...
678 add_target: Add a target to the list of all possible targets.
680 push_target: Make this target the top of the stack of currently used
681 targets, within its particular stratum of the stack. Result
682 is 0 if now atop the stack, nonzero if not on top (maybe
685 unpush_target: Remove this from the stack of currently used targets,
686 no matter where it is on the list. Returns 0 if no
687 change, 1 if removed from stack.
689 pop_target: Remove the top thing on the stack of current targets. */
692 add_target
PARAMS ((struct target_ops
*));
695 push_target
PARAMS ((struct target_ops
*));
698 unpush_target
PARAMS ((struct target_ops
*));
701 target_preopen
PARAMS ((int));
704 pop_target
PARAMS ((void));
706 /* Struct section_table maps address ranges to file sections. It is
707 mostly used with BFD files, but can be used without (e.g. for handling
708 raw disks, or files not in formats handled by BFD). */
710 struct section_table
{
711 CORE_ADDR addr
; /* Lowest address in section */
712 CORE_ADDR endaddr
; /* 1+highest address in section */
714 sec_ptr the_bfd_section
;
716 bfd
*bfd
; /* BFD file pointer */
719 /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
720 Returns 0 if OK, 1 on error. */
723 build_section_table
PARAMS ((bfd
*, struct section_table
**,
724 struct section_table
**));
726 /* From mem-break.c */
729 memory_remove_breakpoint
PARAMS ((CORE_ADDR
, char *));
732 memory_insert_breakpoint
PARAMS ((CORE_ADDR
, char *));
737 noprocess
PARAMS ((void));
740 find_default_attach
PARAMS ((char *, int));
743 find_default_create_inferior
PARAMS ((char *, char *, char **));
746 find_core_target
PARAMS ((void));
748 /* Stuff that should be shared among the various remote targets. */
750 /* Debugging level. 0 is off, and non-zero values mean to print some debug
751 information (higher values, more information). */
752 extern int remote_debug
;
754 /* Speed in bits per second, or -1 which means don't mess with the speed. */
755 extern int baud_rate
;
756 /* Timeout limit for response from target. */
757 extern int remote_timeout
;
759 /* Functions for helping to write a native target. */
761 /* This is for native targets which use a unix/POSIX-style waitstatus. */
762 extern void store_waitstatus
PARAMS ((struct target_waitstatus
*, int));
764 /* Convert between host signal numbers and enum target_signal's. */
765 extern enum target_signal target_signal_from_host
PARAMS ((int));
766 extern int target_signal_to_host
PARAMS ((enum target_signal
));
768 /* Convert from a number used in a GDB command to an enum target_signal. */
769 extern enum target_signal target_signal_from_command
PARAMS ((int));
771 #endif /* !defined (TARGET_H) */