Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Interface between GDB and target environments, including files and processes |
0088c768 | 2 | |
197e01b6 | 3 | Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
f6519ebc MK |
4 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 |
5 | Free Software Foundation, Inc. | |
0088c768 | 6 | |
c906108c SS |
7 | Contributed by Cygnus Support. Written by John Gilmore. |
8 | ||
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
11 | This program is free software; you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2 of the License, or | |
14 | (at your option) any later version. | |
c906108c | 15 | |
c5aa993b JM |
16 | This program is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
c906108c | 20 | |
c5aa993b JM |
21 | You should have received a copy of the GNU General Public License |
22 | along with this program; if not, write to the Free Software | |
197e01b6 EZ |
23 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
24 | Boston, MA 02110-1301, USA. */ | |
c906108c SS |
25 | |
26 | #if !defined (TARGET_H) | |
27 | #define TARGET_H | |
28 | ||
da3331ec AC |
29 | struct objfile; |
30 | struct ui_file; | |
31 | struct mem_attrib; | |
1e3ff5ad | 32 | struct target_ops; |
8181d85f | 33 | struct bp_target_info; |
da3331ec | 34 | |
c906108c SS |
35 | /* This include file defines the interface between the main part |
36 | of the debugger, and the part which is target-specific, or | |
37 | specific to the communications interface between us and the | |
38 | target. | |
39 | ||
2146d243 RM |
40 | A TARGET is an interface between the debugger and a particular |
41 | kind of file or process. Targets can be STACKED in STRATA, | |
c906108c SS |
42 | so that more than one target can potentially respond to a request. |
43 | In particular, memory accesses will walk down the stack of targets | |
44 | until they find a target that is interested in handling that particular | |
45 | address. STRATA are artificial boundaries on the stack, within | |
46 | which particular kinds of targets live. Strata exist so that | |
47 | people don't get confused by pushing e.g. a process target and then | |
48 | a file target, and wondering why they can't see the current values | |
49 | of variables any more (the file target is handling them and they | |
50 | never get to the process target). So when you push a file target, | |
51 | it goes into the file stratum, which is always below the process | |
52 | stratum. */ | |
53 | ||
54 | #include "bfd.h" | |
55 | #include "symtab.h" | |
4930751a | 56 | #include "dcache.h" |
29e57380 | 57 | #include "memattr.h" |
c906108c | 58 | |
c5aa993b JM |
59 | enum strata |
60 | { | |
61 | dummy_stratum, /* The lowest of the low */ | |
62 | file_stratum, /* Executable files, etc */ | |
63 | core_stratum, /* Core dump files */ | |
64 | download_stratum, /* Downloading of remote targets */ | |
d4f3574e SS |
65 | process_stratum, /* Executing processes */ |
66 | thread_stratum /* Executing threads */ | |
c5aa993b | 67 | }; |
c906108c | 68 | |
c5aa993b JM |
69 | enum thread_control_capabilities |
70 | { | |
0d06e24b JM |
71 | tc_none = 0, /* Default: can't control thread execution. */ |
72 | tc_schedlock = 1, /* Can lock the thread scheduler. */ | |
73 | tc_switch = 2 /* Can switch the running thread on demand. */ | |
c5aa993b | 74 | }; |
c906108c SS |
75 | |
76 | /* Stuff for target_wait. */ | |
77 | ||
78 | /* Generally, what has the program done? */ | |
c5aa993b JM |
79 | enum target_waitkind |
80 | { | |
81 | /* The program has exited. The exit status is in value.integer. */ | |
82 | TARGET_WAITKIND_EXITED, | |
c906108c | 83 | |
0d06e24b JM |
84 | /* The program has stopped with a signal. Which signal is in |
85 | value.sig. */ | |
c5aa993b | 86 | TARGET_WAITKIND_STOPPED, |
c906108c | 87 | |
c5aa993b JM |
88 | /* The program has terminated with a signal. Which signal is in |
89 | value.sig. */ | |
90 | TARGET_WAITKIND_SIGNALLED, | |
c906108c | 91 | |
c5aa993b JM |
92 | /* The program is letting us know that it dynamically loaded something |
93 | (e.g. it called load(2) on AIX). */ | |
94 | TARGET_WAITKIND_LOADED, | |
c906108c | 95 | |
0d06e24b JM |
96 | /* The program has forked. A "related" process' ID is in |
97 | value.related_pid. I.e., if the child forks, value.related_pid | |
98 | is the parent's ID. */ | |
99 | ||
c5aa993b | 100 | TARGET_WAITKIND_FORKED, |
c906108c | 101 | |
0d06e24b JM |
102 | /* The program has vforked. A "related" process's ID is in |
103 | value.related_pid. */ | |
104 | ||
c5aa993b | 105 | TARGET_WAITKIND_VFORKED, |
c906108c | 106 | |
0d06e24b JM |
107 | /* The program has exec'ed a new executable file. The new file's |
108 | pathname is pointed to by value.execd_pathname. */ | |
109 | ||
c5aa993b | 110 | TARGET_WAITKIND_EXECD, |
c906108c | 111 | |
0d06e24b JM |
112 | /* The program has entered or returned from a system call. On |
113 | HP-UX, this is used in the hardware watchpoint implementation. | |
114 | The syscall's unique integer ID number is in value.syscall_id */ | |
115 | ||
c5aa993b JM |
116 | TARGET_WAITKIND_SYSCALL_ENTRY, |
117 | TARGET_WAITKIND_SYSCALL_RETURN, | |
c906108c | 118 | |
c5aa993b JM |
119 | /* Nothing happened, but we stopped anyway. This perhaps should be handled |
120 | within target_wait, but I'm not sure target_wait should be resuming the | |
121 | inferior. */ | |
c4093a6a JM |
122 | TARGET_WAITKIND_SPURIOUS, |
123 | ||
8e7d2c16 DJ |
124 | /* An event has occured, but we should wait again. |
125 | Remote_async_wait() returns this when there is an event | |
c4093a6a JM |
126 | on the inferior, but the rest of the world is not interested in |
127 | it. The inferior has not stopped, but has just sent some output | |
128 | to the console, for instance. In this case, we want to go back | |
129 | to the event loop and wait there for another event from the | |
130 | inferior, rather than being stuck in the remote_async_wait() | |
131 | function. This way the event loop is responsive to other events, | |
0d06e24b | 132 | like for instance the user typing. */ |
c4093a6a | 133 | TARGET_WAITKIND_IGNORE |
c906108c SS |
134 | }; |
135 | ||
c5aa993b JM |
136 | struct target_waitstatus |
137 | { | |
138 | enum target_waitkind kind; | |
139 | ||
140 | /* Forked child pid, execd pathname, exit status or signal number. */ | |
141 | union | |
142 | { | |
143 | int integer; | |
144 | enum target_signal sig; | |
145 | int related_pid; | |
146 | char *execd_pathname; | |
147 | int syscall_id; | |
148 | } | |
149 | value; | |
150 | }; | |
c906108c | 151 | |
2acceee2 | 152 | /* Possible types of events that the inferior handler will have to |
0d06e24b | 153 | deal with. */ |
2acceee2 JM |
154 | enum inferior_event_type |
155 | { | |
0d06e24b | 156 | /* There is a request to quit the inferior, abandon it. */ |
2acceee2 JM |
157 | INF_QUIT_REQ, |
158 | /* Process a normal inferior event which will result in target_wait | |
0d06e24b | 159 | being called. */ |
2146d243 | 160 | INF_REG_EVENT, |
0d06e24b | 161 | /* Deal with an error on the inferior. */ |
2acceee2 | 162 | INF_ERROR, |
0d06e24b | 163 | /* We are called because a timer went off. */ |
2acceee2 | 164 | INF_TIMER, |
0d06e24b | 165 | /* We are called to do stuff after the inferior stops. */ |
c2d11a7d JM |
166 | INF_EXEC_COMPLETE, |
167 | /* We are called to do some stuff after the inferior stops, but we | |
168 | are expected to reenter the proceed() and | |
169 | handle_inferior_event() functions. This is used only in case of | |
0d06e24b | 170 | 'step n' like commands. */ |
c2d11a7d | 171 | INF_EXEC_CONTINUE |
2acceee2 JM |
172 | }; |
173 | ||
c906108c | 174 | /* Return the string for a signal. */ |
a14ed312 | 175 | extern char *target_signal_to_string (enum target_signal); |
c906108c SS |
176 | |
177 | /* Return the name (SIGHUP, etc.) for a signal. */ | |
a14ed312 | 178 | extern char *target_signal_to_name (enum target_signal); |
c906108c SS |
179 | |
180 | /* Given a name (SIGHUP, etc.), return its signal. */ | |
a14ed312 | 181 | enum target_signal target_signal_from_name (char *); |
c906108c | 182 | \f |
13547ab6 DJ |
183 | /* Target objects which can be transfered using target_read, |
184 | target_write, et cetera. */ | |
1e3ff5ad AC |
185 | |
186 | enum target_object | |
187 | { | |
1e3ff5ad AC |
188 | /* AVR target specific transfer. See "avr-tdep.c" and "remote.c". */ |
189 | TARGET_OBJECT_AVR, | |
190 | /* Transfer up-to LEN bytes of memory starting at OFFSET. */ | |
287a334e | 191 | TARGET_OBJECT_MEMORY, |
cf7a04e8 DJ |
192 | /* Memory, avoiding GDB's data cache and trusting the executable. |
193 | Target implementations of to_xfer_partial never need to handle | |
194 | this object, and most callers should not use it. */ | |
195 | TARGET_OBJECT_RAW_MEMORY, | |
287a334e JJ |
196 | /* Kernel Unwind Table. See "ia64-tdep.c". */ |
197 | TARGET_OBJECT_UNWIND_TABLE, | |
2146d243 RM |
198 | /* Transfer auxilliary vector. */ |
199 | TARGET_OBJECT_AUXV, | |
baf92889 MK |
200 | /* StackGhost cookie. See "sparc-tdep.c". */ |
201 | TARGET_OBJECT_WCOOKIE | |
2146d243 RM |
202 | |
203 | /* Possible future objects: TARGET_OBJECT_FILE, TARGET_OBJECT_PROC, ... */ | |
1e3ff5ad AC |
204 | }; |
205 | ||
13547ab6 DJ |
206 | /* Request that OPS transfer up to LEN 8-bit bytes of the target's |
207 | OBJECT. The OFFSET, for a seekable object, specifies the | |
208 | starting point. The ANNEX can be used to provide additional | |
209 | data-specific information to the target. | |
1e3ff5ad | 210 | |
13547ab6 DJ |
211 | Return the number of bytes actually transfered, or -1 if the |
212 | transfer is not supported or otherwise fails. Return of a positive | |
213 | value less than LEN indicates that no further transfer is possible. | |
214 | Unlike the raw to_xfer_partial interface, callers of these | |
215 | functions do not need to retry partial transfers. */ | |
1e3ff5ad | 216 | |
1e3ff5ad AC |
217 | extern LONGEST target_read (struct target_ops *ops, |
218 | enum target_object object, | |
1b0ba102 | 219 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
220 | ULONGEST offset, LONGEST len); |
221 | ||
222 | extern LONGEST target_write (struct target_ops *ops, | |
223 | enum target_object object, | |
1b0ba102 | 224 | const char *annex, const gdb_byte *buf, |
1e3ff5ad | 225 | ULONGEST offset, LONGEST len); |
b6591e8b | 226 | |
cf7a04e8 DJ |
227 | /* Similar to target_write, except that it also calls PROGRESS |
228 | with the number of bytes written and the opaque BATON after | |
229 | every partial write. This is useful for progress reporting | |
230 | and user interaction while writing data. To abort the transfer, | |
231 | the progress callback can throw an exception. */ | |
232 | LONGEST target_write_with_progress (struct target_ops *ops, | |
233 | enum target_object object, | |
234 | const char *annex, const gdb_byte *buf, | |
235 | ULONGEST offset, LONGEST len, | |
236 | void (*progress) (ULONGEST, void *), | |
237 | void *baton); | |
238 | ||
13547ab6 DJ |
239 | /* Wrapper to perform a full read of unknown size. OBJECT/ANNEX will |
240 | be read using OPS. The return value will be -1 if the transfer | |
241 | fails or is not supported; 0 if the object is empty; or the length | |
242 | of the object otherwise. If a positive value is returned, a | |
243 | sufficiently large buffer will be allocated using xmalloc and | |
244 | returned in *BUF_P containing the contents of the object. | |
245 | ||
246 | This method should be used for objects sufficiently small to store | |
247 | in a single xmalloc'd buffer, when no fixed bound on the object's | |
248 | size is known in advance. Don't try to read TARGET_OBJECT_MEMORY | |
249 | through this function. */ | |
250 | ||
251 | extern LONGEST target_read_alloc (struct target_ops *ops, | |
252 | enum target_object object, | |
253 | const char *annex, gdb_byte **buf_p); | |
254 | ||
159f81f3 DJ |
255 | /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and |
256 | returned as a string, allocated using xmalloc. If an error occurs | |
257 | or the transfer is unsupported, NULL is returned. Empty objects | |
258 | are returned as allocated but empty strings. A warning is issued | |
259 | if the result contains any embedded NUL bytes. */ | |
260 | ||
261 | extern char *target_read_stralloc (struct target_ops *ops, | |
262 | enum target_object object, | |
263 | const char *annex); | |
264 | ||
b6591e8b AC |
265 | /* Wrappers to target read/write that perform memory transfers. They |
266 | throw an error if the memory transfer fails. | |
267 | ||
268 | NOTE: cagney/2003-10-23: The naming schema is lifted from | |
269 | "frame.h". The parameter order is lifted from get_frame_memory, | |
270 | which in turn lifted it from read_memory. */ | |
271 | ||
272 | extern void get_target_memory (struct target_ops *ops, CORE_ADDR addr, | |
1b0ba102 | 273 | gdb_byte *buf, LONGEST len); |
b6591e8b AC |
274 | extern ULONGEST get_target_memory_unsigned (struct target_ops *ops, |
275 | CORE_ADDR addr, int len); | |
1e3ff5ad | 276 | \f |
c5aa993b | 277 | |
c906108c SS |
278 | /* If certain kinds of activity happen, target_wait should perform |
279 | callbacks. */ | |
280 | /* Right now we just call (*TARGET_ACTIVITY_FUNCTION) if I/O is possible | |
0d06e24b | 281 | on TARGET_ACTIVITY_FD. */ |
c906108c SS |
282 | extern int target_activity_fd; |
283 | /* Returns zero to leave the inferior alone, one to interrupt it. */ | |
507f3c78 | 284 | extern int (*target_activity_function) (void); |
c906108c | 285 | \f |
0d06e24b JM |
286 | struct thread_info; /* fwd decl for parameter list below: */ |
287 | ||
c906108c | 288 | struct target_ops |
c5aa993b | 289 | { |
258b763a | 290 | struct target_ops *beneath; /* To the target under this one. */ |
c5aa993b JM |
291 | char *to_shortname; /* Name this target type */ |
292 | char *to_longname; /* Name for printing */ | |
293 | char *to_doc; /* Documentation. Does not include trailing | |
c906108c | 294 | newline, and starts with a one-line descrip- |
0d06e24b | 295 | tion (probably similar to to_longname). */ |
bba2d28d AC |
296 | /* Per-target scratch pad. */ |
297 | void *to_data; | |
f1c07ab0 AC |
298 | /* The open routine takes the rest of the parameters from the |
299 | command, and (if successful) pushes a new target onto the | |
300 | stack. Targets should supply this routine, if only to provide | |
301 | an error message. */ | |
507f3c78 | 302 | void (*to_open) (char *, int); |
f1c07ab0 AC |
303 | /* Old targets with a static target vector provide "to_close". |
304 | New re-entrant targets provide "to_xclose" and that is expected | |
305 | to xfree everything (including the "struct target_ops"). */ | |
306 | void (*to_xclose) (struct target_ops *targ, int quitting); | |
507f3c78 KB |
307 | void (*to_close) (int); |
308 | void (*to_attach) (char *, int); | |
309 | void (*to_post_attach) (int); | |
507f3c78 | 310 | void (*to_detach) (char *, int); |
597320e7 | 311 | void (*to_disconnect) (struct target_ops *, char *, int); |
39f77062 KB |
312 | void (*to_resume) (ptid_t, int, enum target_signal); |
313 | ptid_t (*to_wait) (ptid_t, struct target_waitstatus *); | |
507f3c78 KB |
314 | void (*to_fetch_registers) (int); |
315 | void (*to_store_registers) (int); | |
316 | void (*to_prepare_to_store) (void); | |
c5aa993b JM |
317 | |
318 | /* Transfer LEN bytes of memory between GDB address MYADDR and | |
319 | target address MEMADDR. If WRITE, transfer them to the target, else | |
320 | transfer them from the target. TARGET is the target from which we | |
321 | get this function. | |
322 | ||
323 | Return value, N, is one of the following: | |
324 | ||
325 | 0 means that we can't handle this. If errno has been set, it is the | |
326 | error which prevented us from doing it (FIXME: What about bfd_error?). | |
327 | ||
328 | positive (call it N) means that we have transferred N bytes | |
329 | starting at MEMADDR. We might be able to handle more bytes | |
330 | beyond this length, but no promises. | |
331 | ||
332 | negative (call its absolute value N) means that we cannot | |
333 | transfer right at MEMADDR, but we could transfer at least | |
c8e73a31 | 334 | something at MEMADDR + N. |
c5aa993b | 335 | |
c8e73a31 AC |
336 | NOTE: cagney/2004-10-01: This has been entirely superseeded by |
337 | to_xfer_partial and inferior inheritance. */ | |
338 | ||
1b0ba102 | 339 | int (*deprecated_xfer_memory) (CORE_ADDR memaddr, gdb_byte *myaddr, |
c8e73a31 AC |
340 | int len, int write, |
341 | struct mem_attrib *attrib, | |
342 | struct target_ops *target); | |
c906108c | 343 | |
507f3c78 | 344 | void (*to_files_info) (struct target_ops *); |
8181d85f DJ |
345 | int (*to_insert_breakpoint) (struct bp_target_info *); |
346 | int (*to_remove_breakpoint) (struct bp_target_info *); | |
ccaa32c7 | 347 | int (*to_can_use_hw_breakpoint) (int, int, int); |
8181d85f DJ |
348 | int (*to_insert_hw_breakpoint) (struct bp_target_info *); |
349 | int (*to_remove_hw_breakpoint) (struct bp_target_info *); | |
ccaa32c7 GS |
350 | int (*to_remove_watchpoint) (CORE_ADDR, int, int); |
351 | int (*to_insert_watchpoint) (CORE_ADDR, int, int); | |
352 | int (*to_stopped_by_watchpoint) (void); | |
7df1a324 | 353 | int to_have_continuable_watchpoint; |
4aa7a7f5 | 354 | int (*to_stopped_data_address) (struct target_ops *, CORE_ADDR *); |
e0d24f8d | 355 | int (*to_region_ok_for_hw_watchpoint) (CORE_ADDR, int); |
507f3c78 KB |
356 | void (*to_terminal_init) (void); |
357 | void (*to_terminal_inferior) (void); | |
358 | void (*to_terminal_ours_for_output) (void); | |
359 | void (*to_terminal_ours) (void); | |
a790ad35 | 360 | void (*to_terminal_save_ours) (void); |
507f3c78 KB |
361 | void (*to_terminal_info) (char *, int); |
362 | void (*to_kill) (void); | |
363 | void (*to_load) (char *, int); | |
364 | int (*to_lookup_symbol) (char *, CORE_ADDR *); | |
c27cda74 | 365 | void (*to_create_inferior) (char *, char *, char **, int); |
39f77062 | 366 | void (*to_post_startup_inferior) (ptid_t); |
507f3c78 | 367 | void (*to_acknowledge_created_inferior) (int); |
fa113d1a | 368 | void (*to_insert_fork_catchpoint) (int); |
507f3c78 | 369 | int (*to_remove_fork_catchpoint) (int); |
fa113d1a | 370 | void (*to_insert_vfork_catchpoint) (int); |
507f3c78 | 371 | int (*to_remove_vfork_catchpoint) (int); |
ee057212 | 372 | int (*to_follow_fork) (struct target_ops *, int); |
fa113d1a | 373 | void (*to_insert_exec_catchpoint) (int); |
507f3c78 | 374 | int (*to_remove_exec_catchpoint) (int); |
507f3c78 | 375 | int (*to_reported_exec_events_per_exec_call) (void); |
507f3c78 KB |
376 | int (*to_has_exited) (int, int, int *); |
377 | void (*to_mourn_inferior) (void); | |
378 | int (*to_can_run) (void); | |
39f77062 KB |
379 | void (*to_notice_signals) (ptid_t ptid); |
380 | int (*to_thread_alive) (ptid_t ptid); | |
507f3c78 | 381 | void (*to_find_new_threads) (void); |
39f77062 | 382 | char *(*to_pid_to_str) (ptid_t); |
507f3c78 KB |
383 | char *(*to_extra_thread_info) (struct thread_info *); |
384 | void (*to_stop) (void); | |
d9fcf2fb | 385 | void (*to_rcmd) (char *command, struct ui_file *output); |
507f3c78 KB |
386 | struct symtab_and_line *(*to_enable_exception_callback) (enum |
387 | exception_event_kind, | |
388 | int); | |
389 | struct exception_event_record *(*to_get_current_exception_event) (void); | |
390 | char *(*to_pid_to_exec_file) (int pid); | |
c5aa993b | 391 | enum strata to_stratum; |
c5aa993b JM |
392 | int to_has_all_memory; |
393 | int to_has_memory; | |
394 | int to_has_stack; | |
395 | int to_has_registers; | |
396 | int to_has_execution; | |
397 | int to_has_thread_control; /* control thread execution */ | |
c5aa993b JM |
398 | struct section_table |
399 | *to_sections; | |
400 | struct section_table | |
401 | *to_sections_end; | |
6426a772 JM |
402 | /* ASYNC target controls */ |
403 | int (*to_can_async_p) (void); | |
404 | int (*to_is_async_p) (void); | |
0d06e24b JM |
405 | void (*to_async) (void (*cb) (enum inferior_event_type, void *context), |
406 | void *context); | |
ed9a39eb | 407 | int to_async_mask_value; |
2146d243 RM |
408 | int (*to_find_memory_regions) (int (*) (CORE_ADDR, |
409 | unsigned long, | |
410 | int, int, int, | |
411 | void *), | |
be4d1333 MS |
412 | void *); |
413 | char * (*to_make_corefile_notes) (bfd *, int *); | |
3f47be5c EZ |
414 | |
415 | /* Return the thread-local address at OFFSET in the | |
416 | thread-local storage for the thread PTID and the shared library | |
417 | or executable file given by OBJFILE. If that block of | |
418 | thread-local storage hasn't been allocated yet, this function | |
419 | may return an error. */ | |
420 | CORE_ADDR (*to_get_thread_local_address) (ptid_t ptid, | |
b2756930 | 421 | CORE_ADDR load_module_addr, |
3f47be5c EZ |
422 | CORE_ADDR offset); |
423 | ||
13547ab6 DJ |
424 | /* Request that OPS transfer up to LEN 8-bit bytes of the target's |
425 | OBJECT. The OFFSET, for a seekable object, specifies the | |
426 | starting point. The ANNEX can be used to provide additional | |
427 | data-specific information to the target. | |
428 | ||
429 | Return the number of bytes actually transfered, zero when no | |
430 | further transfer is possible, and -1 when the transfer is not | |
431 | supported. Return of a positive value smaller than LEN does | |
432 | not indicate the end of the object, only the end of the | |
433 | transfer; higher level code should continue transferring if | |
434 | desired. This is handled in target.c. | |
435 | ||
436 | The interface does not support a "retry" mechanism. Instead it | |
437 | assumes that at least one byte will be transfered on each | |
438 | successful call. | |
439 | ||
440 | NOTE: cagney/2003-10-17: The current interface can lead to | |
441 | fragmented transfers. Lower target levels should not implement | |
442 | hacks, such as enlarging the transfer, in an attempt to | |
443 | compensate for this. Instead, the target stack should be | |
444 | extended so that it implements supply/collect methods and a | |
445 | look-aside object cache. With that available, the lowest | |
446 | target can safely and freely "push" data up the stack. | |
447 | ||
448 | See target_read and target_write for more information. One, | |
449 | and only one, of readbuf or writebuf must be non-NULL. */ | |
450 | ||
4b8a223f | 451 | LONGEST (*to_xfer_partial) (struct target_ops *ops, |
8aa91c1e | 452 | enum target_object object, const char *annex, |
1b0ba102 | 453 | gdb_byte *readbuf, const gdb_byte *writebuf, |
8aa91c1e | 454 | ULONGEST offset, LONGEST len); |
1e3ff5ad | 455 | |
c5aa993b | 456 | int to_magic; |
0d06e24b JM |
457 | /* Need sub-structure for target machine related rather than comm related? |
458 | */ | |
c5aa993b | 459 | }; |
c906108c SS |
460 | |
461 | /* Magic number for checking ops size. If a struct doesn't end with this | |
462 | number, somebody changed the declaration but didn't change all the | |
463 | places that initialize one. */ | |
464 | ||
465 | #define OPS_MAGIC 3840 | |
466 | ||
467 | /* The ops structure for our "current" target process. This should | |
468 | never be NULL. If there is no target, it points to the dummy_target. */ | |
469 | ||
c5aa993b | 470 | extern struct target_ops current_target; |
c906108c | 471 | |
c906108c SS |
472 | /* Define easy words for doing these operations on our current target. */ |
473 | ||
474 | #define target_shortname (current_target.to_shortname) | |
475 | #define target_longname (current_target.to_longname) | |
476 | ||
f1c07ab0 AC |
477 | /* Does whatever cleanup is required for a target that we are no |
478 | longer going to be calling. QUITTING indicates that GDB is exiting | |
479 | and should not get hung on an error (otherwise it is important to | |
480 | perform clean termination, even if it takes a while). This routine | |
481 | is automatically always called when popping the target off the | |
482 | target stack (to_beneath is undefined). Closing file descriptors | |
483 | and freeing all memory allocated memory are typical things it | |
484 | should do. */ | |
485 | ||
486 | void target_close (struct target_ops *targ, int quitting); | |
c906108c SS |
487 | |
488 | /* Attaches to a process on the target side. Arguments are as passed | |
489 | to the `attach' command by the user. This routine can be called | |
490 | when the target is not on the target-stack, if the target_can_run | |
2146d243 | 491 | routine returns 1; in that case, it must push itself onto the stack. |
c906108c | 492 | Upon exit, the target should be ready for normal operations, and |
2146d243 | 493 | should be ready to deliver the status of the process immediately |
c906108c SS |
494 | (without waiting) to an upcoming target_wait call. */ |
495 | ||
496 | #define target_attach(args, from_tty) \ | |
0d06e24b | 497 | (*current_target.to_attach) (args, from_tty) |
c906108c SS |
498 | |
499 | /* The target_attach operation places a process under debugger control, | |
500 | and stops the process. | |
501 | ||
502 | This operation provides a target-specific hook that allows the | |
0d06e24b | 503 | necessary bookkeeping to be performed after an attach completes. */ |
c906108c | 504 | #define target_post_attach(pid) \ |
0d06e24b | 505 | (*current_target.to_post_attach) (pid) |
c906108c | 506 | |
c906108c SS |
507 | /* Takes a program previously attached to and detaches it. |
508 | The program may resume execution (some targets do, some don't) and will | |
509 | no longer stop on signals, etc. We better not have left any breakpoints | |
510 | in the program or it'll die when it hits one. ARGS is arguments | |
511 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
512 | says whether to be verbose or not. */ | |
513 | ||
a14ed312 | 514 | extern void target_detach (char *, int); |
c906108c | 515 | |
6ad8ae5c DJ |
516 | /* Disconnect from the current target without resuming it (leaving it |
517 | waiting for a debugger). */ | |
518 | ||
519 | extern void target_disconnect (char *, int); | |
520 | ||
39f77062 | 521 | /* Resume execution of the target process PTID. STEP says whether to |
c906108c SS |
522 | single-step or to run free; SIGGNAL is the signal to be given to |
523 | the target, or TARGET_SIGNAL_0 for no signal. The caller may not | |
524 | pass TARGET_SIGNAL_DEFAULT. */ | |
525 | ||
39f77062 | 526 | #define target_resume(ptid, step, siggnal) \ |
4930751a C |
527 | do { \ |
528 | dcache_invalidate(target_dcache); \ | |
39f77062 | 529 | (*current_target.to_resume) (ptid, step, siggnal); \ |
4930751a | 530 | } while (0) |
c906108c | 531 | |
b5a2688f AC |
532 | /* Wait for process pid to do something. PTID = -1 to wait for any |
533 | pid to do something. Return pid of child, or -1 in case of error; | |
c906108c | 534 | store status through argument pointer STATUS. Note that it is |
b5a2688f | 535 | _NOT_ OK to throw_exception() out of target_wait() without popping |
c906108c SS |
536 | the debugging target from the stack; GDB isn't prepared to get back |
537 | to the prompt with a debugging target but without the frame cache, | |
538 | stop_pc, etc., set up. */ | |
539 | ||
39f77062 KB |
540 | #define target_wait(ptid, status) \ |
541 | (*current_target.to_wait) (ptid, status) | |
c906108c | 542 | |
17dee195 | 543 | /* Fetch at least register REGNO, or all regs if regno == -1. No result. */ |
c906108c SS |
544 | |
545 | #define target_fetch_registers(regno) \ | |
0d06e24b | 546 | (*current_target.to_fetch_registers) (regno) |
c906108c SS |
547 | |
548 | /* Store at least register REGNO, or all regs if REGNO == -1. | |
549 | It can store as many registers as it wants to, so target_prepare_to_store | |
550 | must have been previously called. Calls error() if there are problems. */ | |
551 | ||
552 | #define target_store_registers(regs) \ | |
0d06e24b | 553 | (*current_target.to_store_registers) (regs) |
c906108c SS |
554 | |
555 | /* Get ready to modify the registers array. On machines which store | |
556 | individual registers, this doesn't need to do anything. On machines | |
557 | which store all the registers in one fell swoop, this makes sure | |
558 | that REGISTERS contains all the registers from the program being | |
559 | debugged. */ | |
560 | ||
561 | #define target_prepare_to_store() \ | |
0d06e24b | 562 | (*current_target.to_prepare_to_store) () |
c906108c | 563 | |
4930751a C |
564 | extern DCACHE *target_dcache; |
565 | ||
a14ed312 | 566 | extern int target_read_string (CORE_ADDR, char **, int, int *); |
c906108c | 567 | |
fc1a4b47 | 568 | extern int target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len); |
c906108c | 569 | |
fc1a4b47 | 570 | extern int target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, |
10e2d419 | 571 | int len); |
c906108c | 572 | |
1b0ba102 | 573 | extern int xfer_memory (CORE_ADDR, gdb_byte *, int, int, |
29e57380 | 574 | struct mem_attrib *, struct target_ops *); |
c906108c | 575 | |
6c932e54 | 576 | extern int child_xfer_memory (CORE_ADDR, gdb_byte *, int, int, |
29e57380 | 577 | struct mem_attrib *, struct target_ops *); |
c906108c | 578 | |
a14ed312 | 579 | extern char *child_pid_to_exec_file (int); |
c906108c | 580 | |
a14ed312 | 581 | extern char *child_core_file_to_sym_file (char *); |
c906108c SS |
582 | |
583 | #if defined(CHILD_POST_ATTACH) | |
a14ed312 | 584 | extern void child_post_attach (int); |
c906108c SS |
585 | #endif |
586 | ||
39f77062 | 587 | extern void child_post_startup_inferior (ptid_t); |
c906108c | 588 | |
a14ed312 | 589 | extern void child_acknowledge_created_inferior (int); |
c906108c | 590 | |
fa113d1a | 591 | extern void child_insert_fork_catchpoint (int); |
c906108c | 592 | |
a14ed312 | 593 | extern int child_remove_fork_catchpoint (int); |
c906108c | 594 | |
fa113d1a | 595 | extern void child_insert_vfork_catchpoint (int); |
c906108c | 596 | |
a14ed312 | 597 | extern int child_remove_vfork_catchpoint (int); |
c906108c | 598 | |
a14ed312 | 599 | extern void child_acknowledge_created_inferior (int); |
c906108c | 600 | |
ee057212 | 601 | extern int child_follow_fork (struct target_ops *, int); |
c906108c | 602 | |
fa113d1a | 603 | extern void child_insert_exec_catchpoint (int); |
c906108c | 604 | |
a14ed312 | 605 | extern int child_remove_exec_catchpoint (int); |
c906108c | 606 | |
a14ed312 | 607 | extern int child_reported_exec_events_per_exec_call (void); |
c906108c | 608 | |
a14ed312 | 609 | extern int child_has_exited (int, int, int *); |
c906108c | 610 | |
39f77062 | 611 | extern int child_thread_alive (ptid_t); |
c906108c | 612 | |
47932f85 DJ |
613 | /* From infrun.c. */ |
614 | ||
615 | extern int inferior_has_forked (int pid, int *child_pid); | |
616 | ||
617 | extern int inferior_has_vforked (int pid, int *child_pid); | |
618 | ||
619 | extern int inferior_has_execd (int pid, char **execd_pathname); | |
620 | ||
c906108c SS |
621 | /* From exec.c */ |
622 | ||
a14ed312 | 623 | extern void print_section_info (struct target_ops *, bfd *); |
c906108c SS |
624 | |
625 | /* Print a line about the current target. */ | |
626 | ||
627 | #define target_files_info() \ | |
0d06e24b | 628 | (*current_target.to_files_info) (¤t_target) |
c906108c | 629 | |
8181d85f DJ |
630 | /* Insert a breakpoint at address BP_TGT->placed_address in the target |
631 | machine. Result is 0 for success, or an errno value. */ | |
c906108c | 632 | |
8181d85f DJ |
633 | #define target_insert_breakpoint(bp_tgt) \ |
634 | (*current_target.to_insert_breakpoint) (bp_tgt) | |
c906108c | 635 | |
8181d85f DJ |
636 | /* Remove a breakpoint at address BP_TGT->placed_address in the target |
637 | machine. Result is 0 for success, or an errno value. */ | |
c906108c | 638 | |
8181d85f DJ |
639 | #define target_remove_breakpoint(bp_tgt) \ |
640 | (*current_target.to_remove_breakpoint) (bp_tgt) | |
c906108c SS |
641 | |
642 | /* Initialize the terminal settings we record for the inferior, | |
643 | before we actually run the inferior. */ | |
644 | ||
645 | #define target_terminal_init() \ | |
0d06e24b | 646 | (*current_target.to_terminal_init) () |
c906108c SS |
647 | |
648 | /* Put the inferior's terminal settings into effect. | |
649 | This is preparation for starting or resuming the inferior. */ | |
650 | ||
651 | #define target_terminal_inferior() \ | |
0d06e24b | 652 | (*current_target.to_terminal_inferior) () |
c906108c SS |
653 | |
654 | /* Put some of our terminal settings into effect, | |
655 | enough to get proper results from our output, | |
656 | but do not change into or out of RAW mode | |
657 | so that no input is discarded. | |
658 | ||
659 | After doing this, either terminal_ours or terminal_inferior | |
660 | should be called to get back to a normal state of affairs. */ | |
661 | ||
662 | #define target_terminal_ours_for_output() \ | |
0d06e24b | 663 | (*current_target.to_terminal_ours_for_output) () |
c906108c SS |
664 | |
665 | /* Put our terminal settings into effect. | |
666 | First record the inferior's terminal settings | |
667 | so they can be restored properly later. */ | |
668 | ||
669 | #define target_terminal_ours() \ | |
0d06e24b | 670 | (*current_target.to_terminal_ours) () |
c906108c | 671 | |
a790ad35 SC |
672 | /* Save our terminal settings. |
673 | This is called from TUI after entering or leaving the curses | |
674 | mode. Since curses modifies our terminal this call is here | |
675 | to take this change into account. */ | |
676 | ||
677 | #define target_terminal_save_ours() \ | |
678 | (*current_target.to_terminal_save_ours) () | |
679 | ||
c906108c SS |
680 | /* Print useful information about our terminal status, if such a thing |
681 | exists. */ | |
682 | ||
683 | #define target_terminal_info(arg, from_tty) \ | |
0d06e24b | 684 | (*current_target.to_terminal_info) (arg, from_tty) |
c906108c SS |
685 | |
686 | /* Kill the inferior process. Make it go away. */ | |
687 | ||
688 | #define target_kill() \ | |
0d06e24b | 689 | (*current_target.to_kill) () |
c906108c | 690 | |
0d06e24b JM |
691 | /* Load an executable file into the target process. This is expected |
692 | to not only bring new code into the target process, but also to | |
1986bccd AS |
693 | update GDB's symbol tables to match. |
694 | ||
695 | ARG contains command-line arguments, to be broken down with | |
696 | buildargv (). The first non-switch argument is the filename to | |
697 | load, FILE; the second is a number (as parsed by strtoul (..., ..., | |
698 | 0)), which is an offset to apply to the load addresses of FILE's | |
699 | sections. The target may define switches, or other non-switch | |
700 | arguments, as it pleases. */ | |
c906108c | 701 | |
11cf8741 | 702 | extern void target_load (char *arg, int from_tty); |
c906108c SS |
703 | |
704 | /* Look up a symbol in the target's symbol table. NAME is the symbol | |
0d06e24b JM |
705 | name. ADDRP is a CORE_ADDR * pointing to where the value of the |
706 | symbol should be returned. The result is 0 if successful, nonzero | |
707 | if the symbol does not exist in the target environment. This | |
708 | function should not call error() if communication with the target | |
709 | is interrupted, since it is called from symbol reading, but should | |
710 | return nonzero, possibly doing a complain(). */ | |
c906108c | 711 | |
0d06e24b JM |
712 | #define target_lookup_symbol(name, addrp) \ |
713 | (*current_target.to_lookup_symbol) (name, addrp) | |
c906108c | 714 | |
39f77062 | 715 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
716 | EXEC_FILE is the file to run. |
717 | ALLARGS is a string containing the arguments to the program. | |
718 | ENV is the environment vector to pass. Errors reported with error(). | |
719 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
c5aa993b | 720 | |
c27cda74 AC |
721 | #define target_create_inferior(exec_file, args, env, FROM_TTY) \ |
722 | (*current_target.to_create_inferior) (exec_file, args, env, (FROM_TTY)) | |
c906108c SS |
723 | |
724 | ||
725 | /* Some targets (such as ttrace-based HPUX) don't allow us to request | |
726 | notification of inferior events such as fork and vork immediately | |
727 | after the inferior is created. (This because of how gdb gets an | |
728 | inferior created via invoking a shell to do it. In such a scenario, | |
729 | if the shell init file has commands in it, the shell will fork and | |
730 | exec for each of those commands, and we will see each such fork | |
731 | event. Very bad.) | |
c5aa993b | 732 | |
0d06e24b JM |
733 | Such targets will supply an appropriate definition for this function. */ |
734 | ||
39f77062 KB |
735 | #define target_post_startup_inferior(ptid) \ |
736 | (*current_target.to_post_startup_inferior) (ptid) | |
c906108c SS |
737 | |
738 | /* On some targets, the sequence of starting up an inferior requires | |
0d06e24b JM |
739 | some synchronization between gdb and the new inferior process, PID. */ |
740 | ||
c906108c | 741 | #define target_acknowledge_created_inferior(pid) \ |
0d06e24b | 742 | (*current_target.to_acknowledge_created_inferior) (pid) |
c906108c | 743 | |
0d06e24b JM |
744 | /* On some targets, we can catch an inferior fork or vfork event when |
745 | it occurs. These functions insert/remove an already-created | |
746 | catchpoint for such events. */ | |
c906108c | 747 | |
c906108c | 748 | #define target_insert_fork_catchpoint(pid) \ |
0d06e24b | 749 | (*current_target.to_insert_fork_catchpoint) (pid) |
c906108c SS |
750 | |
751 | #define target_remove_fork_catchpoint(pid) \ | |
0d06e24b | 752 | (*current_target.to_remove_fork_catchpoint) (pid) |
c906108c SS |
753 | |
754 | #define target_insert_vfork_catchpoint(pid) \ | |
0d06e24b | 755 | (*current_target.to_insert_vfork_catchpoint) (pid) |
c906108c SS |
756 | |
757 | #define target_remove_vfork_catchpoint(pid) \ | |
0d06e24b | 758 | (*current_target.to_remove_vfork_catchpoint) (pid) |
c906108c | 759 | |
6604731b DJ |
760 | /* If the inferior forks or vforks, this function will be called at |
761 | the next resume in order to perform any bookkeeping and fiddling | |
762 | necessary to continue debugging either the parent or child, as | |
763 | requested, and releasing the other. Information about the fork | |
764 | or vfork event is available via get_last_target_status (). | |
765 | This function returns 1 if the inferior should not be resumed | |
766 | (i.e. there is another event pending). */ | |
0d06e24b | 767 | |
ee057212 | 768 | int target_follow_fork (int follow_child); |
c906108c SS |
769 | |
770 | /* On some targets, we can catch an inferior exec event when it | |
0d06e24b JM |
771 | occurs. These functions insert/remove an already-created |
772 | catchpoint for such events. */ | |
773 | ||
c906108c | 774 | #define target_insert_exec_catchpoint(pid) \ |
0d06e24b | 775 | (*current_target.to_insert_exec_catchpoint) (pid) |
c5aa993b | 776 | |
c906108c | 777 | #define target_remove_exec_catchpoint(pid) \ |
0d06e24b | 778 | (*current_target.to_remove_exec_catchpoint) (pid) |
c906108c | 779 | |
c906108c SS |
780 | /* Returns the number of exec events that are reported when a process |
781 | invokes a flavor of the exec() system call on this target, if exec | |
0d06e24b JM |
782 | events are being reported. */ |
783 | ||
c906108c | 784 | #define target_reported_exec_events_per_exec_call() \ |
0d06e24b | 785 | (*current_target.to_reported_exec_events_per_exec_call) () |
c906108c | 786 | |
c906108c | 787 | /* Returns TRUE if PID has exited. And, also sets EXIT_STATUS to the |
0d06e24b JM |
788 | exit code of PID, if any. */ |
789 | ||
c906108c | 790 | #define target_has_exited(pid,wait_status,exit_status) \ |
0d06e24b | 791 | (*current_target.to_has_exited) (pid,wait_status,exit_status) |
c906108c SS |
792 | |
793 | /* The debugger has completed a blocking wait() call. There is now | |
2146d243 | 794 | some process event that must be processed. This function should |
c906108c | 795 | be defined by those targets that require the debugger to perform |
0d06e24b | 796 | cleanup or internal state changes in response to the process event. */ |
c906108c SS |
797 | |
798 | /* The inferior process has died. Do what is right. */ | |
799 | ||
800 | #define target_mourn_inferior() \ | |
0d06e24b | 801 | (*current_target.to_mourn_inferior) () |
c906108c SS |
802 | |
803 | /* Does target have enough data to do a run or attach command? */ | |
804 | ||
805 | #define target_can_run(t) \ | |
0d06e24b | 806 | ((t)->to_can_run) () |
c906108c SS |
807 | |
808 | /* post process changes to signal handling in the inferior. */ | |
809 | ||
39f77062 KB |
810 | #define target_notice_signals(ptid) \ |
811 | (*current_target.to_notice_signals) (ptid) | |
c906108c SS |
812 | |
813 | /* Check to see if a thread is still alive. */ | |
814 | ||
39f77062 KB |
815 | #define target_thread_alive(ptid) \ |
816 | (*current_target.to_thread_alive) (ptid) | |
c906108c | 817 | |
b83266a0 SS |
818 | /* Query for new threads and add them to the thread list. */ |
819 | ||
820 | #define target_find_new_threads() \ | |
0d06e24b | 821 | (*current_target.to_find_new_threads) (); \ |
b83266a0 | 822 | |
0d06e24b JM |
823 | /* Make target stop in a continuable fashion. (For instance, under |
824 | Unix, this should act like SIGSTOP). This function is normally | |
825 | used by GUIs to implement a stop button. */ | |
c906108c SS |
826 | |
827 | #define target_stop current_target.to_stop | |
828 | ||
96baa820 JM |
829 | /* Send the specified COMMAND to the target's monitor |
830 | (shell,interpreter) for execution. The result of the query is | |
0d06e24b | 831 | placed in OUTBUF. */ |
96baa820 JM |
832 | |
833 | #define target_rcmd(command, outbuf) \ | |
834 | (*current_target.to_rcmd) (command, outbuf) | |
835 | ||
836 | ||
c906108c | 837 | /* Get the symbol information for a breakpointable routine called when |
2146d243 | 838 | an exception event occurs. |
c906108c SS |
839 | Intended mainly for C++, and for those |
840 | platforms/implementations where such a callback mechanism is available, | |
841 | e.g. HP-UX with ANSI C++ (aCC). Some compilers (e.g. g++) support | |
0d06e24b | 842 | different mechanisms for debugging exceptions. */ |
c906108c SS |
843 | |
844 | #define target_enable_exception_callback(kind, enable) \ | |
0d06e24b | 845 | (*current_target.to_enable_exception_callback) (kind, enable) |
c906108c | 846 | |
0d06e24b | 847 | /* Get the current exception event kind -- throw or catch, etc. */ |
c5aa993b | 848 | |
c906108c | 849 | #define target_get_current_exception_event() \ |
0d06e24b | 850 | (*current_target.to_get_current_exception_event) () |
c906108c | 851 | |
c906108c SS |
852 | /* Does the target include all of memory, or only part of it? This |
853 | determines whether we look up the target chain for other parts of | |
854 | memory if this target can't satisfy a request. */ | |
855 | ||
856 | #define target_has_all_memory \ | |
0d06e24b | 857 | (current_target.to_has_all_memory) |
c906108c SS |
858 | |
859 | /* Does the target include memory? (Dummy targets don't.) */ | |
860 | ||
861 | #define target_has_memory \ | |
0d06e24b | 862 | (current_target.to_has_memory) |
c906108c SS |
863 | |
864 | /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until | |
865 | we start a process.) */ | |
c5aa993b | 866 | |
c906108c | 867 | #define target_has_stack \ |
0d06e24b | 868 | (current_target.to_has_stack) |
c906108c SS |
869 | |
870 | /* Does the target have registers? (Exec files don't.) */ | |
871 | ||
872 | #define target_has_registers \ | |
0d06e24b | 873 | (current_target.to_has_registers) |
c906108c SS |
874 | |
875 | /* Does the target have execution? Can we make it jump (through | |
876 | hoops), or pop its stack a few times? FIXME: If this is to work that | |
877 | way, it needs to check whether an inferior actually exists. | |
878 | remote-udi.c and probably other targets can be the current target | |
879 | when the inferior doesn't actually exist at the moment. Right now | |
880 | this just tells us whether this target is *capable* of execution. */ | |
881 | ||
882 | #define target_has_execution \ | |
0d06e24b | 883 | (current_target.to_has_execution) |
c906108c SS |
884 | |
885 | /* Can the target support the debugger control of thread execution? | |
886 | a) Can it lock the thread scheduler? | |
887 | b) Can it switch the currently running thread? */ | |
888 | ||
889 | #define target_can_lock_scheduler \ | |
0d06e24b | 890 | (current_target.to_has_thread_control & tc_schedlock) |
c906108c SS |
891 | |
892 | #define target_can_switch_threads \ | |
0d06e24b | 893 | (current_target.to_has_thread_control & tc_switch) |
c906108c | 894 | |
6426a772 JM |
895 | /* Can the target support asynchronous execution? */ |
896 | #define target_can_async_p() (current_target.to_can_async_p ()) | |
897 | ||
898 | /* Is the target in asynchronous execution mode? */ | |
899 | #define target_is_async_p() (current_target.to_is_async_p()) | |
900 | ||
901 | /* Put the target in async mode with the specified callback function. */ | |
0d06e24b JM |
902 | #define target_async(CALLBACK,CONTEXT) \ |
903 | (current_target.to_async((CALLBACK), (CONTEXT))) | |
43ff13b4 | 904 | |
04714b91 AC |
905 | /* This is to be used ONLY within call_function_by_hand(). It provides |
906 | a workaround, to have inferior function calls done in sychronous | |
907 | mode, even though the target is asynchronous. After | |
ed9a39eb JM |
908 | target_async_mask(0) is called, calls to target_can_async_p() will |
909 | return FALSE , so that target_resume() will not try to start the | |
910 | target asynchronously. After the inferior stops, we IMMEDIATELY | |
911 | restore the previous nature of the target, by calling | |
912 | target_async_mask(1). After that, target_can_async_p() will return | |
04714b91 | 913 | TRUE. ANY OTHER USE OF THIS FEATURE IS DEPRECATED. |
ed9a39eb JM |
914 | |
915 | FIXME ezannoni 1999-12-13: we won't need this once we move | |
916 | the turning async on and off to the single execution commands, | |
0d06e24b | 917 | from where it is done currently, in remote_resume(). */ |
ed9a39eb JM |
918 | |
919 | #define target_async_mask_value \ | |
0d06e24b | 920 | (current_target.to_async_mask_value) |
ed9a39eb | 921 | |
2146d243 | 922 | extern int target_async_mask (int mask); |
ed9a39eb | 923 | |
c906108c SS |
924 | /* Converts a process id to a string. Usually, the string just contains |
925 | `process xyz', but on some systems it may contain | |
926 | `process xyz thread abc'. */ | |
927 | ||
ed9a39eb JM |
928 | #undef target_pid_to_str |
929 | #define target_pid_to_str(PID) current_target.to_pid_to_str (PID) | |
c906108c SS |
930 | |
931 | #ifndef target_tid_to_str | |
932 | #define target_tid_to_str(PID) \ | |
0d06e24b | 933 | target_pid_to_str (PID) |
39f77062 | 934 | extern char *normal_pid_to_str (ptid_t ptid); |
c906108c | 935 | #endif |
c5aa993b | 936 | |
0d06e24b JM |
937 | /* Return a short string describing extra information about PID, |
938 | e.g. "sleeping", "runnable", "running on LWP 3". Null return value | |
939 | is okay. */ | |
940 | ||
941 | #define target_extra_thread_info(TP) \ | |
942 | (current_target.to_extra_thread_info (TP)) | |
ed9a39eb | 943 | |
11cf8741 JM |
944 | /* |
945 | * New Objfile Event Hook: | |
946 | * | |
947 | * Sometimes a GDB component wants to get notified whenever a new | |
2146d243 | 948 | * objfile is loaded. Mainly this is used by thread-debugging |
11cf8741 JM |
949 | * implementations that need to know when symbols for the target |
950 | * thread implemenation are available. | |
951 | * | |
952 | * The old way of doing this is to define a macro 'target_new_objfile' | |
953 | * that points to the function that you want to be called on every | |
954 | * objfile/shlib load. | |
9a4105ab AC |
955 | |
956 | The new way is to grab the function pointer, | |
957 | 'deprecated_target_new_objfile_hook', and point it to the function | |
958 | that you want to be called on every objfile/shlib load. | |
959 | ||
960 | If multiple clients are willing to be cooperative, they can each | |
961 | save a pointer to the previous value of | |
962 | deprecated_target_new_objfile_hook before modifying it, and arrange | |
963 | for their function to call the previous function in the chain. In | |
964 | that way, multiple clients can receive this notification (something | |
965 | like with signal handlers). */ | |
966 | ||
967 | extern void (*deprecated_target_new_objfile_hook) (struct objfile *); | |
c906108c SS |
968 | |
969 | #ifndef target_pid_or_tid_to_str | |
970 | #define target_pid_or_tid_to_str(ID) \ | |
0d06e24b | 971 | target_pid_to_str (ID) |
c906108c SS |
972 | #endif |
973 | ||
974 | /* Attempts to find the pathname of the executable file | |
975 | that was run to create a specified process. | |
976 | ||
977 | The process PID must be stopped when this operation is used. | |
c5aa993b | 978 | |
c906108c SS |
979 | If the executable file cannot be determined, NULL is returned. |
980 | ||
981 | Else, a pointer to a character string containing the pathname | |
982 | is returned. This string should be copied into a buffer by | |
983 | the client if the string will not be immediately used, or if | |
0d06e24b | 984 | it must persist. */ |
c906108c SS |
985 | |
986 | #define target_pid_to_exec_file(pid) \ | |
0d06e24b | 987 | (current_target.to_pid_to_exec_file) (pid) |
c906108c | 988 | |
be4d1333 MS |
989 | /* |
990 | * Iterator function for target memory regions. | |
991 | * Calls a callback function once for each memory region 'mapped' | |
992 | * in the child process. Defined as a simple macro rather than | |
2146d243 | 993 | * as a function macro so that it can be tested for nullity. |
be4d1333 MS |
994 | */ |
995 | ||
996 | #define target_find_memory_regions(FUNC, DATA) \ | |
997 | (current_target.to_find_memory_regions) (FUNC, DATA) | |
998 | ||
999 | /* | |
1000 | * Compose corefile .note section. | |
1001 | */ | |
1002 | ||
1003 | #define target_make_corefile_notes(BFD, SIZE_P) \ | |
1004 | (current_target.to_make_corefile_notes) (BFD, SIZE_P) | |
1005 | ||
3f47be5c EZ |
1006 | /* Thread-local values. */ |
1007 | #define target_get_thread_local_address \ | |
1008 | (current_target.to_get_thread_local_address) | |
1009 | #define target_get_thread_local_address_p() \ | |
1010 | (target_get_thread_local_address != NULL) | |
1011 | ||
9d8a64cb | 1012 | /* Hook to call target dependent code just after inferior target process has |
c906108c SS |
1013 | started. */ |
1014 | ||
1015 | #ifndef TARGET_CREATE_INFERIOR_HOOK | |
1016 | #define TARGET_CREATE_INFERIOR_HOOK(PID) | |
1017 | #endif | |
1018 | ||
1019 | /* Hardware watchpoint interfaces. */ | |
1020 | ||
1021 | /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or | |
1022 | write). */ | |
1023 | ||
1024 | #ifndef STOPPED_BY_WATCHPOINT | |
ccaa32c7 GS |
1025 | #define STOPPED_BY_WATCHPOINT(w) \ |
1026 | (*current_target.to_stopped_by_watchpoint) () | |
c906108c | 1027 | #endif |
7df1a324 KW |
1028 | |
1029 | /* Non-zero if we have continuable watchpoints */ | |
1030 | ||
1031 | #ifndef HAVE_CONTINUABLE_WATCHPOINT | |
1032 | #define HAVE_CONTINUABLE_WATCHPOINT \ | |
1033 | (current_target.to_have_continuable_watchpoint) | |
1034 | #endif | |
c906108c | 1035 | |
ccaa32c7 | 1036 | /* Provide defaults for hardware watchpoint functions. */ |
c906108c | 1037 | |
2146d243 | 1038 | /* If the *_hw_beakpoint functions have not been defined |
ccaa32c7 | 1039 | elsewhere use the definitions in the target vector. */ |
c906108c SS |
1040 | |
1041 | /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is | |
1042 | one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or | |
1043 | bp_hardware_breakpoint. CNT is the number of such watchpoints used so far | |
1044 | (including this one?). OTHERTYPE is who knows what... */ | |
1045 | ||
ccaa32c7 GS |
1046 | #ifndef TARGET_CAN_USE_HARDWARE_WATCHPOINT |
1047 | #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(TYPE,CNT,OTHERTYPE) \ | |
1048 | (*current_target.to_can_use_hw_breakpoint) (TYPE, CNT, OTHERTYPE); | |
1049 | #endif | |
c906108c | 1050 | |
e0d24f8d WZ |
1051 | #ifndef TARGET_REGION_OK_FOR_HW_WATCHPOINT |
1052 | #define TARGET_REGION_OK_FOR_HW_WATCHPOINT(addr, len) \ | |
1053 | (*current_target.to_region_ok_for_hw_watchpoint) (addr, len) | |
1054 | #endif | |
1055 | ||
c906108c SS |
1056 | |
1057 | /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes. TYPE is 0 | |
1058 | for write, 1 for read, and 2 for read/write accesses. Returns 0 for | |
1059 | success, non-zero for failure. */ | |
1060 | ||
ccaa32c7 GS |
1061 | #ifndef target_insert_watchpoint |
1062 | #define target_insert_watchpoint(addr, len, type) \ | |
1063 | (*current_target.to_insert_watchpoint) (addr, len, type) | |
c906108c | 1064 | |
ccaa32c7 GS |
1065 | #define target_remove_watchpoint(addr, len, type) \ |
1066 | (*current_target.to_remove_watchpoint) (addr, len, type) | |
1067 | #endif | |
c906108c SS |
1068 | |
1069 | #ifndef target_insert_hw_breakpoint | |
8181d85f DJ |
1070 | #define target_insert_hw_breakpoint(bp_tgt) \ |
1071 | (*current_target.to_insert_hw_breakpoint) (bp_tgt) | |
ccaa32c7 | 1072 | |
8181d85f DJ |
1073 | #define target_remove_hw_breakpoint(bp_tgt) \ |
1074 | (*current_target.to_remove_hw_breakpoint) (bp_tgt) | |
c906108c SS |
1075 | #endif |
1076 | ||
4aa7a7f5 JJ |
1077 | extern int target_stopped_data_address_p (struct target_ops *); |
1078 | ||
c906108c | 1079 | #ifndef target_stopped_data_address |
4aa7a7f5 JJ |
1080 | #define target_stopped_data_address(target, x) \ |
1081 | (*target.to_stopped_data_address) (target, x) | |
1082 | #else | |
1083 | /* Horrible hack to get around existing macros :-(. */ | |
1084 | #define target_stopped_data_address_p(CURRENT_TARGET) (1) | |
c906108c SS |
1085 | #endif |
1086 | ||
c906108c SS |
1087 | /* This will only be defined by a target that supports catching vfork events, |
1088 | such as HP-UX. | |
1089 | ||
1090 | On some targets (such as HP-UX 10.20 and earlier), resuming a newly vforked | |
1091 | child process after it has exec'd, causes the parent process to resume as | |
1092 | well. To prevent the parent from running spontaneously, such targets should | |
0d06e24b | 1093 | define this to a function that prevents that from happening. */ |
c906108c SS |
1094 | #if !defined(ENSURE_VFORKING_PARENT_REMAINS_STOPPED) |
1095 | #define ENSURE_VFORKING_PARENT_REMAINS_STOPPED(PID) (0) | |
1096 | #endif | |
1097 | ||
1098 | /* This will only be defined by a target that supports catching vfork events, | |
1099 | such as HP-UX. | |
1100 | ||
1101 | On some targets (such as HP-UX 10.20 and earlier), a newly vforked child | |
1102 | process must be resumed when it delivers its exec event, before the parent | |
0d06e24b JM |
1103 | vfork event will be delivered to us. */ |
1104 | ||
c906108c SS |
1105 | #if !defined(RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK) |
1106 | #define RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK() (0) | |
1107 | #endif | |
1108 | ||
1109 | /* Routines for maintenance of the target structures... | |
1110 | ||
1111 | add_target: Add a target to the list of all possible targets. | |
1112 | ||
1113 | push_target: Make this target the top of the stack of currently used | |
c5aa993b JM |
1114 | targets, within its particular stratum of the stack. Result |
1115 | is 0 if now atop the stack, nonzero if not on top (maybe | |
1116 | should warn user). | |
c906108c SS |
1117 | |
1118 | unpush_target: Remove this from the stack of currently used targets, | |
c5aa993b JM |
1119 | no matter where it is on the list. Returns 0 if no |
1120 | change, 1 if removed from stack. | |
c906108c | 1121 | |
c5aa993b | 1122 | pop_target: Remove the top thing on the stack of current targets. */ |
c906108c | 1123 | |
a14ed312 | 1124 | extern void add_target (struct target_ops *); |
c906108c | 1125 | |
a14ed312 | 1126 | extern int push_target (struct target_ops *); |
c906108c | 1127 | |
a14ed312 | 1128 | extern int unpush_target (struct target_ops *); |
c906108c | 1129 | |
a14ed312 | 1130 | extern void target_preopen (int); |
c906108c | 1131 | |
a14ed312 | 1132 | extern void pop_target (void); |
c906108c SS |
1133 | |
1134 | /* Struct section_table maps address ranges to file sections. It is | |
1135 | mostly used with BFD files, but can be used without (e.g. for handling | |
1136 | raw disks, or files not in formats handled by BFD). */ | |
1137 | ||
c5aa993b JM |
1138 | struct section_table |
1139 | { | |
1140 | CORE_ADDR addr; /* Lowest address in section */ | |
1141 | CORE_ADDR endaddr; /* 1+highest address in section */ | |
c906108c | 1142 | |
7be0c536 | 1143 | struct bfd_section *the_bfd_section; |
c906108c | 1144 | |
c5aa993b JM |
1145 | bfd *bfd; /* BFD file pointer */ |
1146 | }; | |
c906108c | 1147 | |
8db32d44 AC |
1148 | /* Return the "section" containing the specified address. */ |
1149 | struct section_table *target_section_by_addr (struct target_ops *target, | |
1150 | CORE_ADDR addr); | |
1151 | ||
1152 | ||
c906108c SS |
1153 | /* From mem-break.c */ |
1154 | ||
8181d85f | 1155 | extern int memory_remove_breakpoint (struct bp_target_info *); |
c906108c | 1156 | |
8181d85f | 1157 | extern int memory_insert_breakpoint (struct bp_target_info *); |
c906108c | 1158 | |
8181d85f | 1159 | extern int default_memory_remove_breakpoint (struct bp_target_info *); |
917317f4 | 1160 | |
8181d85f | 1161 | extern int default_memory_insert_breakpoint (struct bp_target_info *); |
917317f4 | 1162 | |
c906108c SS |
1163 | |
1164 | /* From target.c */ | |
1165 | ||
a14ed312 | 1166 | extern void initialize_targets (void); |
c906108c | 1167 | |
a14ed312 | 1168 | extern void noprocess (void); |
c906108c | 1169 | |
a14ed312 | 1170 | extern void find_default_attach (char *, int); |
c906108c | 1171 | |
c27cda74 | 1172 | extern void find_default_create_inferior (char *, char *, char **, int); |
c906108c | 1173 | |
a14ed312 | 1174 | extern struct target_ops *find_run_target (void); |
7a292a7a | 1175 | |
a14ed312 | 1176 | extern struct target_ops *find_core_target (void); |
6426a772 | 1177 | |
a14ed312 | 1178 | extern struct target_ops *find_target_beneath (struct target_ops *); |
ed9a39eb | 1179 | |
570b8f7c AC |
1180 | extern int target_resize_to_sections (struct target_ops *target, |
1181 | int num_added); | |
07cd4b97 JB |
1182 | |
1183 | extern void remove_target_sections (bfd *abfd); | |
1184 | ||
c906108c SS |
1185 | \f |
1186 | /* Stuff that should be shared among the various remote targets. */ | |
1187 | ||
1188 | /* Debugging level. 0 is off, and non-zero values mean to print some debug | |
1189 | information (higher values, more information). */ | |
1190 | extern int remote_debug; | |
1191 | ||
1192 | /* Speed in bits per second, or -1 which means don't mess with the speed. */ | |
1193 | extern int baud_rate; | |
1194 | /* Timeout limit for response from target. */ | |
1195 | extern int remote_timeout; | |
1196 | ||
c906108c SS |
1197 | \f |
1198 | /* Functions for helping to write a native target. */ | |
1199 | ||
1200 | /* This is for native targets which use a unix/POSIX-style waitstatus. */ | |
a14ed312 | 1201 | extern void store_waitstatus (struct target_waitstatus *, int); |
c906108c | 1202 | |
c2d11a7d | 1203 | /* Predicate to target_signal_to_host(). Return non-zero if the enum |
0d06e24b | 1204 | targ_signal SIGNO has an equivalent ``host'' representation. */ |
c2d11a7d JM |
1205 | /* FIXME: cagney/1999-11-22: The name below was chosen in preference |
1206 | to the shorter target_signal_p() because it is far less ambigious. | |
1207 | In this context ``target_signal'' refers to GDB's internal | |
1208 | representation of the target's set of signals while ``host signal'' | |
0d06e24b JM |
1209 | refers to the target operating system's signal. Confused? */ |
1210 | ||
c2d11a7d JM |
1211 | extern int target_signal_to_host_p (enum target_signal signo); |
1212 | ||
1213 | /* Convert between host signal numbers and enum target_signal's. | |
1214 | target_signal_to_host() returns 0 and prints a warning() on GDB's | |
0d06e24b | 1215 | console if SIGNO has no equivalent host representation. */ |
c2d11a7d JM |
1216 | /* FIXME: cagney/1999-11-22: Here ``host'' is used incorrectly, it is |
1217 | refering to the target operating system's signal numbering. | |
1218 | Similarly, ``enum target_signal'' is named incorrectly, ``enum | |
1219 | gdb_signal'' would probably be better as it is refering to GDB's | |
0d06e24b JM |
1220 | internal representation of a target operating system's signal. */ |
1221 | ||
a14ed312 KB |
1222 | extern enum target_signal target_signal_from_host (int); |
1223 | extern int target_signal_to_host (enum target_signal); | |
c906108c SS |
1224 | |
1225 | /* Convert from a number used in a GDB command to an enum target_signal. */ | |
a14ed312 | 1226 | extern enum target_signal target_signal_from_command (int); |
c906108c SS |
1227 | |
1228 | /* Any target can call this to switch to remote protocol (in remote.c). */ | |
a14ed312 | 1229 | extern void push_remote_target (char *name, int from_tty); |
c906108c SS |
1230 | \f |
1231 | /* Imported from machine dependent code */ | |
1232 | ||
c906108c | 1233 | /* Blank target vector entries are initialized to target_ignore. */ |
a14ed312 | 1234 | void target_ignore (void); |
c906108c | 1235 | |
1df84f13 | 1236 | extern struct target_ops deprecated_child_ops; |
5ac10fd1 | 1237 | |
c5aa993b | 1238 | #endif /* !defined (TARGET_H) */ |