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5bf970f9 AC |
1 | /* Low level Unix child interface to ptrace, for GDB when running under Unix. |
2 | ||
3 | Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, | |
4 | 1998, 1999, 2000, 2001, 2002, 2004 Free Software Foundation, Inc. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #include "defs.h" | |
24 | #include "observer.h" | |
25 | #include "gdb_ptrace.h" | |
26 | #include "inflow.h" | |
27 | #include "inferior.h" | |
28 | #include "regcache.h" | |
29 | #include "command.h" | |
30 | #include "gdbcore.h" | |
31 | #include "inf-child.h" | |
32 | #include "gdbcmd.h" | |
7681f339 | 33 | #include "gdb_string.h" |
5bf970f9 AC |
34 | |
35 | #include <sys/wait.h> | |
36 | #include <signal.h> | |
37 | ||
38 | /* HACK: Save the ptrace ops returned by ptrace_target. */ | |
39 | static struct target_ops *ptrace_ops_hack; | |
40 | ||
41 | static void | |
42 | inf_ptrace_kill_inferior (void) | |
43 | { | |
44 | int status; | |
45 | int pid = PIDGET (inferior_ptid); | |
46 | ||
47 | if (pid == 0) | |
48 | return; | |
49 | ||
50 | /* This once used to call "kill" to kill the inferior just in case | |
51 | the inferior was still running. As others have noted in the past | |
52 | (kingdon) there shouldn't be any way to get here if the inferior | |
53 | is still running -- else there's a major problem elsewere in gdb | |
54 | and it needs to be fixed. | |
55 | ||
56 | The kill call causes problems under hpux10, so it's been removed; | |
57 | if this causes problems we'll deal with them as they arise. */ | |
62ece330 MK |
58 | ptrace (PT_KILL, pid, (PTRACE_TYPE_ARG3) 0, 0); |
59 | wait (&status); | |
5bf970f9 AC |
60 | target_mourn_inferior (); |
61 | } | |
62 | ||
63 | /* Resume execution of the inferior process. If STEP is nonzero, | |
64 | single-step it. If SIGNAL is nonzero, give it that signal. */ | |
65 | ||
66 | static void | |
67 | inf_ptrace_resume (ptid_t ptid, int step, enum target_signal signal) | |
68 | { | |
69 | int request = PT_CONTINUE; | |
70 | int pid = PIDGET (ptid); | |
71 | ||
72 | if (pid == -1) | |
73 | /* Resume all threads. */ | |
74 | /* I think this only gets used in the non-threaded case, where | |
75 | "resume all threads" and "resume inferior_ptid" are the | |
76 | same. */ | |
77 | pid = PIDGET (inferior_ptid); | |
78 | ||
79 | if (step) | |
80 | { | |
81 | /* If this system does not support PT_STEP, a higher level | |
82 | function will have called single_step() to transmute the step | |
83 | request into a continue request (by setting breakpoints on | |
84 | all possible successor instructions), so we don't have to | |
85 | worry about that here. */ | |
86 | request = PT_STEP; | |
87 | } | |
88 | ||
89 | /* An address of (PTRACE_TYPE_ARG3)1 tells ptrace to continue from | |
90 | where it was. If GDB wanted it to start some other way, we have | |
91 | already written a new PC value to the child. */ | |
92 | errno = 0; | |
93 | ptrace (request, pid, (PTRACE_TYPE_ARG3) 1, target_signal_to_host (signal)); | |
94 | if (errno != 0) | |
95 | perror_with_name ("ptrace"); | |
96 | } | |
97 | ||
98 | /* Set an upper limit on alloca. */ | |
99 | #define GDB_MAX_ALLOCA 0x1000 | |
100 | ||
101 | /* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory | |
102 | in the NEW_SUN_PTRACE case. It ought to be straightforward. But | |
103 | it appears that writing did not write the data that I specified. I | |
104 | cannot understand where it got the data that it actually did | |
105 | write. */ | |
106 | ||
107 | /* Copy LEN bytes to or from inferior's memory starting at MEMADDR to | |
108 | debugger memory starting at MYADDR. Copy to inferior if WRITE is | |
109 | nonzero. TARGET is ignored. | |
110 | ||
111 | Returns the length copied, which is either the LEN argument or | |
112 | zero. This xfer function does not do partial moves, since | |
113 | ptrace_ops_hack doesn't allow memory operations to cross below us in the | |
114 | target stack anyway. */ | |
115 | ||
116 | int | |
117 | inf_ptrace_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, | |
118 | struct mem_attrib *attrib, struct target_ops *target) | |
119 | { | |
120 | int i; | |
121 | /* Round starting address down to longword boundary. */ | |
122 | CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_TYPE_RET); | |
123 | /* Round ending address up; get number of longwords that makes. */ | |
124 | int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1) | |
125 | / sizeof (PTRACE_TYPE_RET)); | |
126 | int alloc = count * sizeof (PTRACE_TYPE_RET); | |
127 | PTRACE_TYPE_RET *buffer; | |
128 | struct cleanup *old_chain = NULL; | |
129 | ||
130 | #ifdef PT_IO | |
131 | /* OpenBSD 3.1, NetBSD 1.6 and FreeBSD 5.0 have a new PT_IO request | |
132 | that promises to be much more efficient in reading and writing | |
133 | data in the traced process's address space. */ | |
134 | ||
135 | { | |
136 | struct ptrace_io_desc piod; | |
137 | ||
138 | /* NOTE: We assume that there are no distinct address spaces for | |
139 | instruction and data. */ | |
140 | piod.piod_op = write ? PIOD_WRITE_D : PIOD_READ_D; | |
141 | piod.piod_offs = (void *) memaddr; | |
142 | piod.piod_addr = myaddr; | |
143 | piod.piod_len = len; | |
144 | ||
27acbe61 | 145 | if (ptrace (PT_IO, PIDGET (inferior_ptid), (caddr_t) &piod, 0) == -1) |
5bf970f9 AC |
146 | { |
147 | /* If the PT_IO request is somehow not supported, fallback on | |
148 | using PT_WRITE_D/PT_READ_D. Otherwise we will return zero | |
149 | to indicate failure. */ | |
150 | if (errno != EINVAL) | |
151 | return 0; | |
152 | } | |
153 | else | |
154 | { | |
155 | /* Return the actual number of bytes read or written. */ | |
156 | return piod.piod_len; | |
157 | } | |
158 | } | |
159 | #endif | |
160 | ||
161 | /* Allocate buffer of that many longwords. */ | |
162 | if (len < GDB_MAX_ALLOCA) | |
163 | { | |
164 | buffer = (PTRACE_TYPE_RET *) alloca (alloc); | |
165 | } | |
166 | else | |
167 | { | |
168 | buffer = (PTRACE_TYPE_RET *) xmalloc (alloc); | |
169 | old_chain = make_cleanup (xfree, buffer); | |
170 | } | |
171 | ||
172 | if (write) | |
173 | { | |
174 | /* Fill start and end extra bytes of buffer with existing memory | |
175 | data. */ | |
176 | if (addr != memaddr || len < (int) sizeof (PTRACE_TYPE_RET)) | |
177 | { | |
178 | /* Need part of initial word -- fetch it. */ | |
179 | buffer[0] = ptrace (PT_READ_I, PIDGET (inferior_ptid), | |
180 | (PTRACE_TYPE_ARG3) addr, 0); | |
181 | } | |
182 | ||
183 | if (count > 1) /* FIXME, avoid if even boundary. */ | |
184 | { | |
185 | buffer[count - 1] = | |
186 | ptrace (PT_READ_I, PIDGET (inferior_ptid), | |
187 | ((PTRACE_TYPE_ARG3) | |
188 | (addr + (count - 1) * sizeof (PTRACE_TYPE_RET))), 0); | |
189 | } | |
190 | ||
191 | /* Copy data to be written over corresponding part of buffer. */ | |
192 | memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)), | |
193 | myaddr, len); | |
194 | ||
195 | /* Write the entire buffer. */ | |
196 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET)) | |
197 | { | |
198 | errno = 0; | |
199 | ptrace (PT_WRITE_D, PIDGET (inferior_ptid), | |
200 | (PTRACE_TYPE_ARG3) addr, buffer[i]); | |
201 | if (errno) | |
202 | { | |
203 | /* Using the appropriate one (I or D) is necessary for | |
204 | Gould NP1, at least. */ | |
205 | errno = 0; | |
206 | ptrace (PT_WRITE_I, PIDGET (inferior_ptid), | |
207 | (PTRACE_TYPE_ARG3) addr, buffer[i]); | |
208 | } | |
209 | if (errno) | |
210 | return 0; | |
211 | } | |
212 | } | |
213 | else | |
214 | { | |
215 | /* Read all the longwords. */ | |
216 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET)) | |
217 | { | |
218 | errno = 0; | |
219 | buffer[i] = ptrace (PT_READ_I, PIDGET (inferior_ptid), | |
220 | (PTRACE_TYPE_ARG3) addr, 0); | |
221 | if (errno) | |
222 | return 0; | |
223 | QUIT; | |
224 | } | |
225 | ||
226 | /* Copy appropriate bytes out of the buffer. */ | |
227 | memcpy (myaddr, | |
228 | (char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)), | |
229 | len); | |
230 | } | |
231 | ||
232 | if (old_chain != NULL) | |
233 | do_cleanups (old_chain); | |
234 | return len; | |
235 | } | |
236 | ||
237 | /* Wait for child to do something. Return pid of child, or -1 in case | |
238 | of error; store status through argument pointer OURSTATUS. */ | |
239 | ||
240 | static ptid_t | |
241 | inf_ptrace_wait (ptid_t ptid, struct target_waitstatus *ourstatus) | |
242 | { | |
243 | int save_errno; | |
244 | int status; | |
245 | char *execd_pathname = NULL; | |
246 | int exit_status; | |
247 | int related_pid; | |
248 | int syscall_id; | |
249 | enum target_waitkind kind; | |
250 | int pid; | |
251 | ||
252 | do | |
253 | { | |
254 | set_sigint_trap (); /* Causes SIGINT to be passed on to the | |
255 | attached process. */ | |
256 | set_sigio_trap (); | |
257 | ||
62ece330 MK |
258 | pid = wait (&status); |
259 | target_post_wait (pid_to_ptid (pid), status); | |
5bf970f9 AC |
260 | |
261 | save_errno = errno; | |
262 | ||
263 | clear_sigio_trap (); | |
264 | ||
265 | clear_sigint_trap (); | |
266 | ||
267 | if (pid == -1) | |
268 | { | |
269 | if (save_errno == EINTR) | |
270 | continue; | |
271 | ||
272 | fprintf_unfiltered (gdb_stderr, | |
273 | "Child process unexpectedly missing: %s.\n", | |
274 | safe_strerror (save_errno)); | |
275 | ||
276 | /* Claim it exited with unknown signal. */ | |
277 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
278 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; | |
279 | return pid_to_ptid (-1); | |
280 | } | |
281 | ||
282 | /* Did it exit? | |
283 | */ | |
284 | if (target_has_exited (pid, status, &exit_status)) | |
285 | { | |
286 | /* ??rehrauer: For now, ignore this. */ | |
287 | continue; | |
288 | } | |
289 | ||
290 | if (!target_thread_alive (pid_to_ptid (pid))) | |
291 | { | |
292 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
293 | return pid_to_ptid (pid); | |
294 | } | |
295 | } | |
296 | while (pid != PIDGET (inferior_ptid)); /* Some other child died or stopped */ | |
297 | ||
298 | store_waitstatus (ourstatus, status); | |
299 | return pid_to_ptid (pid); | |
300 | } | |
301 | ||
302 | void | |
303 | inf_ptrace_post_wait (ptid_t ptid, int wait_status) | |
304 | { | |
305 | /* This version of Unix doesn't require a meaningful "post wait" | |
306 | operation. | |
307 | */ | |
308 | } | |
309 | ||
310 | /* Check to see if the given thread is alive. | |
311 | ||
312 | FIXME: Is kill() ever the right way to do this? I doubt it, but | |
313 | for now we're going to try and be compatable with the old thread | |
314 | code. */ | |
315 | ||
316 | static int | |
317 | inf_ptrace_thread_alive (ptid_t ptid) | |
318 | { | |
319 | pid_t pid = PIDGET (ptid); | |
320 | ||
321 | return (kill (pid, 0) != -1); | |
322 | } | |
323 | ||
324 | /* Attach to process PID, then initialize for debugging it. */ | |
325 | ||
326 | static void | |
327 | inf_ptrace_attach (char *args, int from_tty) | |
328 | { | |
329 | char *exec_file; | |
330 | int pid; | |
331 | char *dummy; | |
332 | ||
333 | if (!args) | |
334 | error_no_arg ("process-id to attach"); | |
335 | ||
336 | dummy = args; | |
337 | pid = strtol (args, &dummy, 0); | |
338 | /* Some targets don't set errno on errors, grrr! */ | |
339 | if ((pid == 0) && (args == dummy)) | |
340 | error ("Illegal process-id: %s\n", args); | |
341 | ||
342 | if (pid == getpid ()) /* Trying to masturbate? */ | |
343 | error ("I refuse to debug myself!"); | |
344 | ||
345 | if (from_tty) | |
346 | { | |
347 | exec_file = (char *) get_exec_file (0); | |
348 | ||
349 | if (exec_file) | |
350 | printf_unfiltered ("Attaching to program: %s, %s\n", exec_file, | |
351 | target_pid_to_str (pid_to_ptid (pid))); | |
352 | else | |
353 | printf_unfiltered ("Attaching to %s\n", | |
354 | target_pid_to_str (pid_to_ptid (pid))); | |
355 | ||
356 | gdb_flush (gdb_stdout); | |
357 | } | |
358 | ||
359 | attach (pid); | |
360 | ||
361 | inferior_ptid = pid_to_ptid (pid); | |
362 | push_target (ptrace_ops_hack); | |
363 | } | |
364 | ||
365 | static void | |
366 | inf_ptrace_post_attach (int pid) | |
367 | { | |
368 | /* This version of Unix doesn't require a meaningful "post attach" | |
369 | operation by a debugger. */ | |
370 | } | |
371 | ||
372 | /* Take a program previously attached to and detaches it. The program | |
373 | resumes execution and will no longer stop on signals, etc. We'd | |
374 | better not have left any breakpoints in the program or it'll die | |
375 | when it hits one. For this to work, it may be necessary for the | |
376 | process to have been previously attached. It *might* work if the | |
377 | program was started via the normal ptrace (PTRACE_TRACEME). */ | |
378 | ||
379 | static void | |
380 | inf_ptrace_detach (char *args, int from_tty) | |
381 | { | |
382 | int siggnal = 0; | |
383 | int pid = PIDGET (inferior_ptid); | |
384 | ||
385 | if (from_tty) | |
386 | { | |
387 | char *exec_file = get_exec_file (0); | |
388 | if (exec_file == 0) | |
389 | exec_file = ""; | |
390 | printf_unfiltered ("Detaching from program: %s, %s\n", exec_file, | |
391 | target_pid_to_str (pid_to_ptid (pid))); | |
392 | gdb_flush (gdb_stdout); | |
393 | } | |
394 | if (args) | |
395 | siggnal = atoi (args); | |
396 | ||
397 | detach (siggnal); | |
398 | ||
399 | inferior_ptid = null_ptid; | |
400 | unpush_target (ptrace_ops_hack); | |
401 | } | |
402 | ||
403 | /* Get ready to modify the registers array. On machines which store | |
404 | individual registers, this doesn't need to do anything. On | |
405 | machines which store all the registers in one fell swoop, this | |
406 | makes sure that registers contains all the registers from the | |
407 | program being debugged. */ | |
408 | ||
409 | static void | |
410 | inf_ptrace_prepare_to_store (void) | |
411 | { | |
412 | } | |
413 | ||
414 | /* Print status information about what we're accessing. */ | |
415 | ||
416 | static void | |
417 | inf_ptrace_files_info (struct target_ops *ignore) | |
418 | { | |
419 | printf_unfiltered ("\tUsing the running image of %s %s.\n", | |
420 | attach_flag ? "attached" : "child", | |
421 | target_pid_to_str (inferior_ptid)); | |
422 | } | |
423 | ||
424 | static void | |
425 | inf_ptrace_open (char *arg, int from_tty) | |
426 | { | |
427 | error ("Use the \"run\" command to start a Unix child process."); | |
428 | } | |
429 | ||
430 | /* Stub function which causes the inferior that runs it, to be ptrace-able | |
431 | by its parent process. */ | |
432 | ||
433 | static void | |
434 | inf_ptrace_me (void) | |
435 | { | |
436 | /* "Trace me, Dr. Memory!" */ | |
62ece330 | 437 | ptrace (0, 0, (PTRACE_TYPE_ARG3) 0, 0); |
5bf970f9 AC |
438 | } |
439 | ||
440 | /* Stub function which causes the GDB that runs it, to start ptrace-ing | |
441 | the child process. */ | |
442 | ||
443 | static void | |
444 | inf_ptrace_him (int pid) | |
445 | { | |
446 | push_target (ptrace_ops_hack); | |
447 | ||
448 | /* On some targets, there must be some explicit synchronization | |
449 | between the parent and child processes after the debugger | |
450 | forks, and before the child execs the debuggee program. This | |
451 | call basically gives permission for the child to exec. | |
452 | */ | |
453 | ||
454 | target_acknowledge_created_inferior (pid); | |
455 | ||
456 | /* START_INFERIOR_TRAPS_EXPECTED is defined in inferior.h, | |
457 | * and will be 1 or 2 depending on whether we're starting | |
458 | * without or with a shell. | |
459 | */ | |
460 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
461 | ||
462 | /* On some targets, there must be some explicit actions taken after | |
463 | the inferior has been started up. | |
464 | */ | |
465 | target_post_startup_inferior (pid_to_ptid (pid)); | |
466 | } | |
467 | ||
468 | /* Start an inferior Unix child process and sets inferior_ptid to its | |
469 | pid. EXEC_FILE is the file to run. ALLARGS is a string containing | |
470 | the arguments to the program. ENV is the environment vector to | |
471 | pass. Errors reported with error(). */ | |
472 | ||
473 | static void | |
474 | inf_ptrace_create_inferior (char *exec_file, char *allargs, char **env, | |
475 | int from_tty) | |
476 | { | |
477 | fork_inferior (exec_file, allargs, env, inf_ptrace_me, inf_ptrace_him, | |
478 | NULL, NULL); | |
479 | /* We are at the first instruction we care about. */ | |
480 | observer_notify_inferior_created (¤t_target, from_tty); | |
481 | /* Pedal to the metal... */ | |
482 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); | |
483 | } | |
484 | ||
485 | static void | |
486 | inf_ptrace_post_startup_inferior (ptid_t ptid) | |
487 | { | |
488 | /* This version of Unix doesn't require a meaningful "post startup inferior" | |
489 | operation by a debugger. | |
490 | */ | |
491 | } | |
492 | ||
493 | static void | |
494 | inf_ptrace_acknowledge_created_inferior (int pid) | |
495 | { | |
496 | /* This version of Unix doesn't require a meaningful "acknowledge created inferior" | |
497 | operation by a debugger. | |
498 | */ | |
499 | } | |
500 | ||
501 | static int | |
502 | inf_ptrace_insert_fork_catchpoint (int pid) | |
503 | { | |
504 | /* This version of Unix doesn't support notification of fork events. */ | |
505 | return 0; | |
506 | } | |
507 | ||
508 | static int | |
509 | inf_ptrace_remove_fork_catchpoint (int pid) | |
510 | { | |
511 | /* This version of Unix doesn't support notification of fork events. */ | |
512 | return 0; | |
513 | } | |
514 | ||
515 | static int | |
516 | inf_ptrace_insert_vfork_catchpoint (int pid) | |
517 | { | |
518 | /* This version of Unix doesn't support notification of vfork events. */ | |
519 | return 0; | |
520 | } | |
521 | ||
522 | static int | |
523 | inf_ptrace_remove_vfork_catchpoint (int pid) | |
524 | { | |
525 | /* This version of Unix doesn't support notification of vfork events. */ | |
526 | return 0; | |
527 | } | |
528 | ||
529 | static int | |
530 | inf_ptrace_follow_fork (int follow_child) | |
531 | { | |
532 | /* This version of Unix doesn't support following fork or vfork events. */ | |
533 | return 0; | |
534 | } | |
535 | ||
536 | static int | |
537 | inf_ptrace_insert_exec_catchpoint (int pid) | |
538 | { | |
539 | /* This version of Unix doesn't support notification of exec events. */ | |
540 | return 0; | |
541 | } | |
542 | ||
543 | static int | |
544 | inf_ptrace_remove_exec_catchpoint (int pid) | |
545 | { | |
546 | /* This version of Unix doesn't support notification of exec events. */ | |
547 | return 0; | |
548 | } | |
549 | ||
550 | static int | |
551 | inf_ptrace_reported_exec_events_per_exec_call (void) | |
552 | { | |
553 | /* This version of Unix doesn't support notification of exec events. | |
554 | */ | |
555 | return 1; | |
556 | } | |
557 | ||
558 | static int | |
559 | inf_ptrace_has_exited (int pid, int wait_status, int *exit_status) | |
560 | { | |
561 | if (WIFEXITED (wait_status)) | |
562 | { | |
563 | *exit_status = WEXITSTATUS (wait_status); | |
564 | return 1; | |
565 | } | |
566 | ||
567 | if (WIFSIGNALED (wait_status)) | |
568 | { | |
569 | *exit_status = 0; /* ?? Don't know what else to say here. */ | |
570 | return 1; | |
571 | } | |
572 | ||
573 | /* ?? Do we really need to consult the event state, too? Assume the | |
574 | wait_state alone suffices. | |
575 | */ | |
576 | return 0; | |
577 | } | |
578 | ||
579 | static void | |
580 | inf_ptrace_mourn_inferior (void) | |
581 | { | |
582 | unpush_target (ptrace_ops_hack); | |
583 | generic_mourn_inferior (); | |
584 | } | |
585 | ||
586 | static int | |
587 | inf_ptrace_can_run (void) | |
588 | { | |
589 | return 1; | |
590 | } | |
591 | ||
592 | /* Send a SIGINT to the process group. This acts just like the user | |
593 | typed a ^C on the controlling terminal. | |
594 | ||
595 | XXX - This may not be correct for all systems. Some may want to | |
596 | use killpg() instead of kill (-pgrp). */ | |
597 | ||
598 | static void | |
599 | inf_ptrace_stop (void) | |
600 | { | |
601 | kill (-inferior_process_group, SIGINT); | |
602 | } | |
603 | ||
604 | /* Perform a partial transfer to/from the specified object. For | |
605 | memory transfers, fall back to the old memory xfer functions. */ | |
606 | ||
607 | static LONGEST | |
608 | inf_ptrace_xfer_partial (struct target_ops *ops, enum target_object object, | |
609 | const char *annex, void *readbuf, | |
610 | const void *writebuf, ULONGEST offset, LONGEST len) | |
611 | { | |
612 | switch (object) | |
613 | { | |
614 | case TARGET_OBJECT_MEMORY: | |
615 | if (readbuf) | |
616 | return inf_ptrace_xfer_memory (offset, readbuf, len, 0 /*write */ , | |
617 | NULL, ops); | |
618 | if (writebuf) | |
619 | return inf_ptrace_xfer_memory (offset, readbuf, len, 1 /*write */ , | |
620 | NULL, ops); | |
621 | return -1; | |
622 | ||
623 | case TARGET_OBJECT_UNWIND_TABLE: | |
624 | return -1; | |
625 | ||
626 | case TARGET_OBJECT_AUXV: | |
627 | return -1; | |
628 | ||
629 | case TARGET_OBJECT_WCOOKIE: | |
630 | return -1; | |
631 | ||
632 | default: | |
633 | return -1; | |
634 | } | |
635 | } | |
636 | ||
637 | static char * | |
638 | inf_ptrace_pid_to_str (ptid_t ptid) | |
639 | { | |
640 | return normal_pid_to_str (ptid); | |
641 | } | |
642 | ||
643 | struct target_ops * | |
644 | inf_ptrace_target (void) | |
645 | { | |
646 | struct target_ops *t = inf_child_target (); | |
647 | t->to_open = inf_ptrace_open; | |
648 | t->to_attach = inf_ptrace_attach; | |
649 | t->to_post_attach = inf_ptrace_post_attach; | |
650 | t->to_detach = inf_ptrace_detach; | |
651 | t->to_resume = inf_ptrace_resume; | |
652 | t->to_wait = inf_ptrace_wait; | |
653 | t->to_post_wait = inf_ptrace_post_wait; | |
654 | t->to_prepare_to_store = inf_ptrace_prepare_to_store; | |
655 | t->to_xfer_memory = inf_ptrace_xfer_memory; | |
656 | t->to_xfer_partial = inf_ptrace_xfer_partial; | |
657 | t->to_files_info = inf_ptrace_files_info; | |
658 | t->to_kill = inf_ptrace_kill_inferior; | |
659 | t->to_create_inferior = inf_ptrace_create_inferior; | |
660 | t->to_post_startup_inferior = inf_ptrace_post_startup_inferior; | |
661 | t->to_acknowledge_created_inferior = | |
662 | inf_ptrace_acknowledge_created_inferior; | |
663 | t->to_insert_fork_catchpoint = inf_ptrace_insert_fork_catchpoint; | |
664 | t->to_remove_fork_catchpoint = inf_ptrace_remove_fork_catchpoint; | |
665 | t->to_insert_vfork_catchpoint = inf_ptrace_insert_vfork_catchpoint; | |
666 | t->to_remove_vfork_catchpoint = inf_ptrace_remove_vfork_catchpoint; | |
667 | t->to_follow_fork = inf_ptrace_follow_fork; | |
668 | t->to_insert_exec_catchpoint = inf_ptrace_insert_exec_catchpoint; | |
669 | t->to_remove_exec_catchpoint = inf_ptrace_remove_exec_catchpoint; | |
670 | t->to_reported_exec_events_per_exec_call = | |
671 | inf_ptrace_reported_exec_events_per_exec_call; | |
672 | t->to_has_exited = inf_ptrace_has_exited; | |
673 | t->to_mourn_inferior = inf_ptrace_mourn_inferior; | |
674 | t->to_can_run = inf_ptrace_can_run; | |
675 | t->to_thread_alive = inf_ptrace_thread_alive; | |
676 | t->to_pid_to_str = inf_ptrace_pid_to_str; | |
677 | t->to_stop = inf_ptrace_stop; | |
678 | t->to_stratum = process_stratum; | |
679 | t->to_has_all_memory = 1; | |
680 | t->to_has_memory = 1; | |
681 | t->to_has_stack = 1; | |
682 | t->to_has_registers = 1; | |
683 | t->to_has_execution = 1; | |
684 | t->to_magic = OPS_MAGIC; | |
685 | ptrace_ops_hack = t; | |
686 | return t; | |
687 | } |