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 /* Mach exceptions */
182 TARGET_EXC_BAD_ACCESS = 76,
183 TARGET_EXC_BAD_INSTRUCTION = 77,
184 TARGET_EXC_ARITHMETIC = 78,
185 TARGET_EXC_EMULATION = 79,
186 TARGET_EXC_SOFTWARE = 80,
187 TARGET_EXC_BREAKPOINT = 81,
189 /* Some signal we don't know about. */
190 TARGET_SIGNAL_UNKNOWN,
192 /* Use whatever signal we use when one is not specifically specified
193 (for passing to proceed and so on). */
194 TARGET_SIGNAL_DEFAULT,
196 /* Last and unused enum value, for sizing arrays, etc. */
200 struct target_waitstatus {
201 enum target_waitkind kind;
203 /* Exit status or signal number. */
206 enum target_signal sig;
210 /* Return the string for a signal. */
211 extern char *target_signal_to_string PARAMS ((enum target_signal));
213 /* Return the name (SIGHUP, etc.) for a signal. */
214 extern char *target_signal_to_name PARAMS ((enum target_signal));
216 /* Given a name (SIGHUP, etc.), return its signal. */
217 enum target_signal target_signal_from_name PARAMS ((char *));
219 /* If certain kinds of activity happen, target_wait should perform
221 /* Right now we just call (*TARGET_ACTIVITY_FUNCTION) if I/O is possible
222 on TARGET_ACTIVITY_FD. */
223 extern int target_activity_fd;
224 /* Returns zero to leave the inferior alone, one to interrupt it. */
225 extern int (*target_activity_function) PARAMS ((void));
229 char *to_shortname; /* Name this target type */
230 char *to_longname; /* Name for printing */
231 char *to_doc; /* Documentation. Does not include trailing
232 newline, and starts with a one-line descrip-
233 tion (probably similar to to_longname). */
234 void (*to_open) PARAMS ((char *, int));
235 void (*to_close) PARAMS ((int));
236 void (*to_attach) PARAMS ((char *, int));
237 void (*to_detach) PARAMS ((char *, int));
238 void (*to_resume) PARAMS ((int, int, enum target_signal));
239 int (*to_wait) PARAMS ((int, struct target_waitstatus *));
240 void (*to_fetch_registers) PARAMS ((int));
241 void (*to_store_registers) PARAMS ((int));
242 void (*to_prepare_to_store) PARAMS ((void));
244 /* Transfer LEN bytes of memory between GDB address MYADDR and
245 target address MEMADDR. If WRITE, transfer them to the target, else
246 transfer them from the target. TARGET is the target from which we
249 Return value, N, is one of the following:
251 0 means that we can't handle this. If errno has been set, it is the
252 error which prevented us from doing it (FIXME: What about bfd_error?).
254 positive (call it N) means that we have transferred N bytes
255 starting at MEMADDR. We might be able to handle more bytes
256 beyond this length, but no promises.
258 negative (call its absolute value N) means that we cannot
259 transfer right at MEMADDR, but we could transfer at least
260 something at MEMADDR + N. */
262 int (*to_xfer_memory) PARAMS ((CORE_ADDR memaddr, char *myaddr,
264 struct target_ops * target));
267 /* Enable this after 4.12. */
269 /* Search target memory. Start at STARTADDR and take LEN bytes of
270 target memory, and them with MASK, and compare to DATA. If they
271 match, set *ADDR_FOUND to the address we found it at, store the data
272 we found at LEN bytes starting at DATA_FOUND, and return. If
273 not, add INCREMENT to the search address and keep trying until
274 the search address is outside of the range [LORANGE,HIRANGE).
276 If we don't find anything, set *ADDR_FOUND to (CORE_ADDR)0 and return. */
277 void (*to_search) PARAMS ((int len, char *data, char *mask,
278 CORE_ADDR startaddr, int increment,
279 CORE_ADDR lorange, CORE_ADDR hirange,
280 CORE_ADDR *addr_found, char *data_found));
282 #define target_search(len, data, mask, startaddr, increment, lorange, hirange, addr_found, data_found) \
283 (*current_target.to_search) (len, data, mask, startaddr, increment, \
284 lorange, hirange, addr_found, data_found)
287 void (*to_files_info) PARAMS ((struct target_ops *));
288 int (*to_insert_breakpoint) PARAMS ((CORE_ADDR, char *));
289 int (*to_remove_breakpoint) PARAMS ((CORE_ADDR, char *));
290 void (*to_terminal_init) PARAMS ((void));
291 void (*to_terminal_inferior) PARAMS ((void));
292 void (*to_terminal_ours_for_output) PARAMS ((void));
293 void (*to_terminal_ours) PARAMS ((void));
294 void (*to_terminal_info) PARAMS ((char *, int));
295 void (*to_kill) PARAMS ((void));
296 void (*to_load) PARAMS ((char *, int));
297 int (*to_lookup_symbol) PARAMS ((char *, CORE_ADDR *));
298 void (*to_create_inferior) PARAMS ((char *, char *, char **));
299 void (*to_mourn_inferior) PARAMS ((void));
300 int (*to_can_run) PARAMS ((void));
301 void (*to_notice_signals) PARAMS ((int pid));
302 int (*to_thread_alive) PARAMS ((int pid));
303 void (*to_stop) PARAMS ((void));
304 enum strata to_stratum;
306 *DONT_USE; /* formerly to_next */
307 int to_has_all_memory;
310 int to_has_registers;
311 int to_has_execution;
317 /* Need sub-structure for target machine related rather than comm related? */
320 /* Magic number for checking ops size. If a struct doesn't end with this
321 number, somebody changed the declaration but didn't change all the
322 places that initialize one. */
324 #define OPS_MAGIC 3840
326 /* The ops structure for our "current" target process. This should
327 never be NULL. If there is no target, it points to the dummy_target. */
329 extern struct target_ops current_target;
331 /* An item on the target stack. */
333 struct target_stack_item
335 struct target_stack_item *next;
336 struct target_ops *target_ops;
339 /* The target stack. */
341 extern struct target_stack_item *target_stack;
343 /* Define easy words for doing these operations on our current target. */
345 #define target_shortname (current_target.to_shortname)
346 #define target_longname (current_target.to_longname)
348 /* The open routine takes the rest of the parameters from the command,
349 and (if successful) pushes a new target onto the stack.
350 Targets should supply this routine, if only to provide an error message. */
351 #define target_open(name, from_tty) \
352 (*current_target.to_open) (name, from_tty)
354 /* Does whatever cleanup is required for a target that we are no longer
355 going to be calling. Argument says whether we are quitting gdb and
356 should not get hung in case of errors, or whether we want a clean
357 termination even if it takes a while. This routine is automatically
358 always called just before a routine is popped off the target stack.
359 Closing file descriptors and freeing memory are typical things it should
362 #define target_close(quitting) \
363 (*current_target.to_close) (quitting)
365 /* Attaches to a process on the target side. Arguments are as passed
366 to the `attach' command by the user. This routine can be called
367 when the target is not on the target-stack, if the target_can_run
368 routine returns 1; in that case, it must push itself onto the stack.
369 Upon exit, the target should be ready for normal operations, and
370 should be ready to deliver the status of the process immediately
371 (without waiting) to an upcoming target_wait call. */
373 #define target_attach(args, from_tty) \
374 (*current_target.to_attach) (args, from_tty)
376 /* Takes a program previously attached to and detaches it.
377 The program may resume execution (some targets do, some don't) and will
378 no longer stop on signals, etc. We better not have left any breakpoints
379 in the program or it'll die when it hits one. ARGS is arguments
380 typed by the user (e.g. a signal to send the process). FROM_TTY
381 says whether to be verbose or not. */
384 target_detach PARAMS ((char *, int));
386 /* Resume execution of the target process PID. STEP says whether to
387 single-step or to run free; SIGGNAL is the signal to be given to
388 the target, or TARGET_SIGNAL_0 for no signal. The caller may not
389 pass TARGET_SIGNAL_DEFAULT. */
391 #define target_resume(pid, step, siggnal) \
392 (*current_target.to_resume) (pid, step, siggnal)
394 /* Wait for process pid to do something. Pid = -1 to wait for any pid
395 to do something. Return pid of child, or -1 in case of error;
396 store status through argument pointer STATUS. Note that it is
397 *not* OK to return_to_top_level out of target_wait without popping
398 the debugging target from the stack; GDB isn't prepared to get back
399 to the prompt with a debugging target but without the frame cache,
400 stop_pc, etc., set up. */
402 #define target_wait(pid, status) \
403 (*current_target.to_wait) (pid, status)
405 /* Fetch register REGNO, or all regs if regno == -1. No result. */
407 #define target_fetch_registers(regno) \
408 (*current_target.to_fetch_registers) (regno)
410 /* Store at least register REGNO, or all regs if REGNO == -1.
411 It can store as many registers as it wants to, so target_prepare_to_store
412 must have been previously called. Calls error() if there are problems. */
414 #define target_store_registers(regs) \
415 (*current_target.to_store_registers) (regs)
417 /* Get ready to modify the registers array. On machines which store
418 individual registers, this doesn't need to do anything. On machines
419 which store all the registers in one fell swoop, this makes sure
420 that REGISTERS contains all the registers from the program being
423 #define target_prepare_to_store() \
424 (*current_target.to_prepare_to_store) ()
426 extern int target_read_string PARAMS ((CORE_ADDR, char **, int, int *));
429 target_read_memory PARAMS ((CORE_ADDR, char *, int));
432 target_read_memory_partial PARAMS ((CORE_ADDR, char *, int, int *));
435 target_write_memory PARAMS ((CORE_ADDR, char *, int));
438 xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *));
441 child_xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *));
443 /* Transfer LEN bytes between target address MEMADDR and GDB address MYADDR.
444 Returns 0 for success, errno code for failure (which includes partial
445 transfers--if you want a more useful response to partial transfers, try
446 target_read_memory_partial). */
448 extern int target_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr,
449 int len, int write));
454 print_section_info PARAMS ((struct target_ops *, bfd *));
456 /* Print a line about the current target. */
458 #define target_files_info() \
459 (*current_target.to_files_info) (¤t_target)
461 /* Insert a breakpoint at address ADDR in the target machine.
462 SAVE is a pointer to memory allocated for saving the
463 target contents. It is guaranteed by the caller to be long enough
464 to save "sizeof BREAKPOINT" bytes. Result is 0 for success, or
467 #define target_insert_breakpoint(addr, save) \
468 (*current_target.to_insert_breakpoint) (addr, save)
470 /* Remove a breakpoint at address ADDR in the target machine.
471 SAVE is a pointer to the same save area
472 that was previously passed to target_insert_breakpoint.
473 Result is 0 for success, or an errno value. */
475 #define target_remove_breakpoint(addr, save) \
476 (*current_target.to_remove_breakpoint) (addr, save)
478 /* Initialize the terminal settings we record for the inferior,
479 before we actually run the inferior. */
481 #define target_terminal_init() \
482 (*current_target.to_terminal_init) ()
484 /* Put the inferior's terminal settings into effect.
485 This is preparation for starting or resuming the inferior. */
487 #define target_terminal_inferior() \
488 (*current_target.to_terminal_inferior) ()
490 /* Put some of our terminal settings into effect,
491 enough to get proper results from our output,
492 but do not change into or out of RAW mode
493 so that no input is discarded.
495 After doing this, either terminal_ours or terminal_inferior
496 should be called to get back to a normal state of affairs. */
498 #define target_terminal_ours_for_output() \
499 (*current_target.to_terminal_ours_for_output) ()
501 /* Put our terminal settings into effect.
502 First record the inferior's terminal settings
503 so they can be restored properly later. */
505 #define target_terminal_ours() \
506 (*current_target.to_terminal_ours) ()
508 /* Print useful information about our terminal status, if such a thing
511 #define target_terminal_info(arg, from_tty) \
512 (*current_target.to_terminal_info) (arg, from_tty)
514 /* Kill the inferior process. Make it go away. */
516 #define target_kill() \
517 (*current_target.to_kill) ()
519 /* Load an executable file into the target process. This is expected to
520 not only bring new code into the target process, but also to update
521 GDB's symbol tables to match. */
523 #define target_load(arg, from_tty) \
524 (*current_target.to_load) (arg, from_tty)
526 /* Look up a symbol in the target's symbol table. NAME is the symbol
527 name. ADDRP is a CORE_ADDR * pointing to where the value of the symbol
528 should be returned. The result is 0 if successful, nonzero if the
529 symbol does not exist in the target environment. This function should
530 not call error() if communication with the target is interrupted, since
531 it is called from symbol reading, but should return nonzero, possibly
532 doing a complain(). */
534 #define target_lookup_symbol(name, addrp) \
535 (*current_target.to_lookup_symbol) (name, addrp)
537 /* Start an inferior process and set inferior_pid to its pid.
538 EXEC_FILE is the file to run.
539 ALLARGS is a string containing the arguments to the program.
540 ENV is the environment vector to pass. Errors reported with error().
541 On VxWorks and various standalone systems, we ignore exec_file. */
543 #define target_create_inferior(exec_file, args, env) \
544 (*current_target.to_create_inferior) (exec_file, args, env)
546 /* The inferior process has died. Do what is right. */
548 #define target_mourn_inferior() \
549 (*current_target.to_mourn_inferior) ()
551 /* Does target have enough data to do a run or attach command? */
553 #define target_can_run(t) \
556 /* post process changes to signal handling in the inferior. */
558 #define target_notice_signals(pid) \
559 (*current_target.to_notice_signals) (pid)
561 /* Check to see if a thread is still alive. */
563 #define target_thread_alive(pid) \
564 (*current_target.to_thread_alive) (pid)
566 /* Make target stop in a continuable fashion. (For instance, under Unix, this
567 should act like SIGSTOP). This function is normally used by GUIs to
568 implement a stop button. */
570 #define target_stop() current_target.to_stop ()
572 /* Pointer to next target in the chain, e.g. a core file and an exec file. */
574 #define target_next \
575 (current_target.to_next)
577 /* Does the target include all of memory, or only part of it? This
578 determines whether we look up the target chain for other parts of
579 memory if this target can't satisfy a request. */
581 #define target_has_all_memory \
582 (current_target.to_has_all_memory)
584 /* Does the target include memory? (Dummy targets don't.) */
586 #define target_has_memory \
587 (current_target.to_has_memory)
589 /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until
590 we start a process.) */
592 #define target_has_stack \
593 (current_target.to_has_stack)
595 /* Does the target have registers? (Exec files don't.) */
597 #define target_has_registers \
598 (current_target.to_has_registers)
600 /* Does the target have execution? Can we make it jump (through
601 hoops), or pop its stack a few times? FIXME: If this is to work that
602 way, it needs to check whether an inferior actually exists.
603 remote-udi.c and probably other targets can be the current target
604 when the inferior doesn't actually exist at the moment. Right now
605 this just tells us whether this target is *capable* of execution. */
607 #define target_has_execution \
608 (current_target.to_has_execution)
610 extern void target_link PARAMS ((char *, CORE_ADDR *));
612 /* Converts a process id to a string. Usually, the string just contains
613 `process xyz', but on some systems it may contain
614 `process xyz thread abc'. */
616 #ifndef target_pid_to_str
617 #define target_pid_to_str(PID) \
618 normal_pid_to_str (PID)
619 extern char *normal_pid_to_str PARAMS ((int pid));
622 #ifndef target_new_objfile
623 #define target_new_objfile(OBJFILE)
626 /* Hook to call target-dependant code after reading in a new symbol table. */
628 #ifndef TARGET_SYMFILE_POSTREAD
629 #define TARGET_SYMFILE_POSTREAD(OBJFILE)
632 /* Hook to call target dependant code just after inferior target process has
635 #ifndef TARGET_CREATE_INFERIOR_HOOK
636 #define TARGET_CREATE_INFERIOR_HOOK(PID)
639 /* Hardware watchpoint interfaces. */
641 /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or
644 #ifndef STOPPED_BY_WATCHPOINT
645 #define STOPPED_BY_WATCHPOINT(w) 0
648 /* Provide defaults for systems that don't support hardware watchpoints. */
650 #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS
652 /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is
653 one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or
654 bp_hardware_breakpoint. CNT is the number of such watchpoints used so far
655 (including this one?). OTHERTYPE is who knows what... */
657 #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(TYPE,CNT,OTHERTYPE) 0
659 /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes. TYPE is 1
660 for read and 2 for read/write accesses. Returns 0 for success, non-zero for
663 #define target_remove_watchpoint(ADDR,LEN,TYPE) -1
664 #define target_insert_watchpoint(ADDR,LEN,TYPE) -1
666 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
668 #ifndef target_insert_hw_breakpoint
669 #define target_remove_hw_breakpoint(ADDR,SHADOW) -1
670 #define target_insert_hw_breakpoint(ADDR,SHADOW) -1
673 #ifndef target_stopped_data_address
674 #define target_stopped_data_address() 0
677 /* If defined, then we need to decr pc by this much after a hardware break-
678 point. Presumably this overrides DECR_PC_AFTER_BREAK... */
680 #ifndef DECR_PC_AFTER_HW_BREAK
681 #define DECR_PC_AFTER_HW_BREAK 0
684 /* Routines for maintenance of the target structures...
686 add_target: Add a target to the list of all possible targets.
688 push_target: Make this target the top of the stack of currently used
689 targets, within its particular stratum of the stack. Result
690 is 0 if now atop the stack, nonzero if not on top (maybe
693 unpush_target: Remove this from the stack of currently used targets,
694 no matter where it is on the list. Returns 0 if no
695 change, 1 if removed from stack.
697 pop_target: Remove the top thing on the stack of current targets. */
700 add_target PARAMS ((struct target_ops *));
703 push_target PARAMS ((struct target_ops *));
706 unpush_target PARAMS ((struct target_ops *));
709 target_preopen PARAMS ((int));
712 pop_target PARAMS ((void));
714 /* Struct section_table maps address ranges to file sections. It is
715 mostly used with BFD files, but can be used without (e.g. for handling
716 raw disks, or files not in formats handled by BFD). */
718 struct section_table {
719 CORE_ADDR addr; /* Lowest address in section */
720 CORE_ADDR endaddr; /* 1+highest address in section */
722 sec_ptr the_bfd_section;
724 bfd *bfd; /* BFD file pointer */
727 /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
728 Returns 0 if OK, 1 on error. */
731 build_section_table PARAMS ((bfd *, struct section_table **,
732 struct section_table **));
734 /* From mem-break.c */
737 memory_remove_breakpoint PARAMS ((CORE_ADDR, char *));
740 memory_insert_breakpoint PARAMS ((CORE_ADDR, char *));
745 noprocess PARAMS ((void));
748 find_default_attach PARAMS ((char *, int));
751 find_default_create_inferior PARAMS ((char *, char *, char **));
754 find_core_target PARAMS ((void));
756 /* Stuff that should be shared among the various remote targets. */
758 /* Debugging level. 0 is off, and non-zero values mean to print some debug
759 information (higher values, more information). */
760 extern int remote_debug;
762 /* Speed in bits per second, or -1 which means don't mess with the speed. */
763 extern int baud_rate;
764 /* Timeout limit for response from target. */
765 extern int remote_timeout;
767 /* Functions for helping to write a native target. */
769 /* This is for native targets which use a unix/POSIX-style waitstatus. */
770 extern void store_waitstatus PARAMS ((struct target_waitstatus *, int));
772 /* Convert between host signal numbers and enum target_signal's. */
773 extern enum target_signal target_signal_from_host PARAMS ((int));
774 extern int target_signal_to_host PARAMS ((enum target_signal));
776 /* Convert from a number used in a GDB command to an enum target_signal. */
777 extern enum target_signal target_signal_from_command PARAMS ((int));
779 #endif /* !defined (TARGET_H) */