]>
Commit | Line | Data |
---|---|---|
2c4a536d | 1 | /* Low-level child interface to ptrace. |
5bf970f9 | 2 | |
3666a048 | 3 | Copyright (C) 1988-2021 Free Software Foundation, Inc. |
5bf970f9 AC |
4 | |
5 | This file is part of GDB. | |
6 | ||
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
5bf970f9 AC |
10 | (at your option) any later version. |
11 | ||
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. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
5bf970f9 AC |
19 | |
20 | #include "defs.h" | |
5bf970f9 | 21 | #include "command.h" |
2c4a536d | 22 | #include "inferior.h" |
191c4426 | 23 | #include "terminal.h" |
5bf970f9 | 24 | #include "gdbcore.h" |
8785ced0 | 25 | #include "regcache.h" |
e3790375 | 26 | #include "nat/gdb_ptrace.h" |
268a13a5 | 27 | #include "gdbsupport/gdb_wait.h" |
5bf970f9 AC |
28 | #include <signal.h> |
29 | ||
2c0b251b | 30 | #include "inf-ptrace.h" |
2c4a536d | 31 | #include "inf-child.h" |
af990527 | 32 | #include "gdbthread.h" |
2090129c SDJ |
33 | #include "nat/fork-inferior.h" |
34 | #include "utils.h" | |
0d12e84c | 35 | #include "gdbarch.h" |
2c4a536d | 36 | |
c7c14b96 MK |
37 | \f |
38 | ||
f09db380 KR |
39 | static PTRACE_TYPE_RET |
40 | gdb_ptrace (PTRACE_TYPE_ARG1 request, ptid_t ptid, PTRACE_TYPE_ARG3 addr, | |
41 | PTRACE_TYPE_ARG4 data) | |
42 | { | |
43 | #ifdef __NetBSD__ | |
44 | return ptrace (request, ptid.pid (), addr, data); | |
45 | #else | |
46 | pid_t pid = get_ptrace_pid (ptid); | |
47 | return ptrace (request, pid, addr, data); | |
48 | #endif | |
49 | } | |
50 | ||
f6ac5f3d PA |
51 | inf_ptrace_target::~inf_ptrace_target () |
52 | {} | |
53 | ||
735f54b4 MK |
54 | \f |
55 | ||
4b8a1a28 | 56 | /* Prepare to be traced. */ |
5bf970f9 AC |
57 | |
58 | static void | |
c7c14b96 | 59 | inf_ptrace_me (void) |
5bf970f9 | 60 | { |
c7c14b96 | 61 | /* "Trace me, Dr. Memory!" */ |
0db8980c | 62 | if (ptrace (PT_TRACE_ME, 0, (PTRACE_TYPE_ARG3) 0, 0) < 0) |
50fa3001 | 63 | trace_start_error_with_name ("ptrace"); |
5bf970f9 AC |
64 | } |
65 | ||
136d6dae VP |
66 | /* Start a new inferior Unix child process. EXEC_FILE is the file to |
67 | run, ALLARGS is a string containing the arguments to the program. | |
68 | ENV is the environment vector to pass. If FROM_TTY is non-zero, be | |
69 | chatty about it. */ | |
5bf970f9 | 70 | |
f6ac5f3d PA |
71 | void |
72 | inf_ptrace_target::create_inferior (const char *exec_file, | |
73 | const std::string &allargs, | |
74 | char **env, int from_tty) | |
5bf970f9 | 75 | { |
c8fbd44a SM |
76 | inferior *inf = current_inferior (); |
77 | ||
c0edd9ed JK |
78 | /* Do not change either targets above or the same target if already present. |
79 | The reason is the target stack is shared across multiple inferiors. */ | |
c8fbd44a | 80 | int ops_already_pushed = inf->target_is_pushed (this); |
c0edd9ed | 81 | |
9ae79dac | 82 | target_unpush_up unpusher; |
c0edd9ed JK |
83 | if (! ops_already_pushed) |
84 | { | |
85 | /* Clear possible core file with its process_stratum. */ | |
c8fbd44a | 86 | inf->push_target (this); |
f6ac5f3d | 87 | unpusher.reset (this); |
c0edd9ed JK |
88 | } |
89 | ||
6155c136 PA |
90 | pid_t pid = fork_inferior (exec_file, allargs, env, inf_ptrace_me, NULL, |
91 | NULL, NULL, NULL); | |
136d6dae | 92 | |
6155c136 | 93 | ptid_t ptid (pid); |
2090129c SDJ |
94 | /* We have something that executes now. We'll be running through |
95 | the shell at this point (if startup-with-shell is true), but the | |
96 | pid shouldn't change. */ | |
6155c136 PA |
97 | thread_info *thr = add_thread_silent (this, ptid); |
98 | switch_to_thread (thr); | |
2090129c | 99 | |
9ae79dac | 100 | unpusher.release (); |
5bf970f9 | 101 | |
2090129c | 102 | gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED); |
c7c14b96 MK |
103 | |
104 | /* On some targets, there must be some explicit actions taken after | |
105 | the inferior has been started up. */ | |
2090129c | 106 | target_post_startup_inferior (ptid); |
5bf970f9 AC |
107 | } |
108 | ||
4b8a1a28 MK |
109 | /* Clean up a rotting corpse of an inferior after it died. */ |
110 | ||
f6ac5f3d PA |
111 | void |
112 | inf_ptrace_target::mourn_inferior () | |
5bf970f9 | 113 | { |
4b8a1a28 MK |
114 | int status; |
115 | ||
116 | /* Wait just one more time to collect the inferior's exit status. | |
f010475d | 117 | Do not check whether this succeeds though, since we may be |
4b8a1a28 | 118 | dealing with a process that we attached to. Such a process will |
3d450bdd | 119 | only report its exit status to its original parent. */ |
e99b03dc | 120 | waitpid (inferior_ptid.pid (), &status, 0); |
4b8a1a28 | 121 | |
f6ac5f3d | 122 | inf_child_target::mourn_inferior (); |
5bf970f9 AC |
123 | } |
124 | ||
4b8a1a28 MK |
125 | /* Attach to the process specified by ARGS. If FROM_TTY is non-zero, |
126 | be chatty about it. */ | |
5bf970f9 | 127 | |
f6ac5f3d PA |
128 | void |
129 | inf_ptrace_target::attach (const char *args, int from_tty) | |
5bf970f9 | 130 | { |
c8fbd44a | 131 | inferior *inf = current_inferior (); |
5bf970f9 | 132 | |
c0edd9ed JK |
133 | /* Do not change either targets above or the same target if already present. |
134 | The reason is the target stack is shared across multiple inferiors. */ | |
c8fbd44a | 135 | int ops_already_pushed = inf->target_is_pushed (this); |
c0edd9ed | 136 | |
c8fbd44a | 137 | pid_t pid = parse_pid_to_attach (args); |
5bf970f9 | 138 | |
f6ffd89b | 139 | if (pid == getpid ()) /* Trying to masturbate? */ |
8a3fe4f8 | 140 | error (_("I refuse to debug myself!")); |
5bf970f9 | 141 | |
9ae79dac | 142 | target_unpush_up unpusher; |
c0edd9ed JK |
143 | if (! ops_already_pushed) |
144 | { | |
145 | /* target_pid_to_str already uses the target. Also clear possible core | |
146 | file with its process_stratum. */ | |
02980c56 | 147 | inf->push_target (this); |
f6ac5f3d | 148 | unpusher.reset (this); |
c0edd9ed JK |
149 | } |
150 | ||
5bf970f9 AC |
151 | if (from_tty) |
152 | { | |
d9fa87f4 | 153 | const char *exec_file = get_exec_file (0); |
5bf970f9 AC |
154 | |
155 | if (exec_file) | |
a3f17187 | 156 | printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file, |
a068643d | 157 | target_pid_to_str (ptid_t (pid)).c_str ()); |
5bf970f9 | 158 | else |
a3f17187 | 159 | printf_unfiltered (_("Attaching to %s\n"), |
a068643d | 160 | target_pid_to_str (ptid_t (pid)).c_str ()); |
5bf970f9 AC |
161 | } |
162 | ||
6e1e94ea MK |
163 | #ifdef PT_ATTACH |
164 | errno = 0; | |
4b8a1a28 | 165 | ptrace (PT_ATTACH, pid, (PTRACE_TYPE_ARG3)0, 0); |
6e1e94ea | 166 | if (errno != 0) |
e2e0b3e5 | 167 | perror_with_name (("ptrace")); |
6e1e94ea | 168 | #else |
8a3fe4f8 | 169 | error (_("This system does not support attaching to a process")); |
6e1e94ea | 170 | #endif |
5bf970f9 | 171 | |
6c95b8df | 172 | inferior_appeared (inf, pid); |
181e7f93 | 173 | inf->attach_flag = 1; |
7f9f62ba | 174 | |
af990527 PA |
175 | /* Always add a main thread. If some target extends the ptrace |
176 | target, it should decorate the ptid later with more info. */ | |
6155c136 PA |
177 | thread_info *thr = add_thread_silent (this, ptid_t (pid)); |
178 | switch_to_thread (thr); | |
179 | ||
00aecdcf PA |
180 | /* Don't consider the thread stopped until we've processed its |
181 | initial SIGSTOP stop. */ | |
5b6d1e4f | 182 | set_executing (this, thr->ptid, true); |
af990527 | 183 | |
9ae79dac | 184 | unpusher.release (); |
5bf970f9 AC |
185 | } |
186 | ||
6bd6f3b6 | 187 | /* Detach from the inferior. If FROM_TTY is non-zero, be chatty about it. */ |
5bf970f9 | 188 | |
f6ac5f3d PA |
189 | void |
190 | inf_ptrace_target::detach (inferior *inf, int from_tty) | |
5bf970f9 | 191 | { |
e99b03dc | 192 | pid_t pid = inferior_ptid.pid (); |
5bf970f9 | 193 | |
0f48b757 | 194 | target_announce_detach (from_tty); |
5bf970f9 | 195 | |
6e1e94ea | 196 | #ifdef PT_DETACH |
4b8a1a28 | 197 | /* We'd better not have left any breakpoints in the program or it'll |
f010475d | 198 | die when it hits one. Also note that this may only work if we |
4b8a1a28 MK |
199 | previously attached to the inferior. It *might* work if we |
200 | started the process ourselves. */ | |
6e1e94ea | 201 | errno = 0; |
6bd6f3b6 | 202 | ptrace (PT_DETACH, pid, (PTRACE_TYPE_ARG3)1, 0); |
6e1e94ea | 203 | if (errno != 0) |
e2e0b3e5 | 204 | perror_with_name (("ptrace")); |
6e1e94ea | 205 | #else |
8a3fe4f8 | 206 | error (_("This system does not support detaching from a process")); |
6e1e94ea | 207 | #endif |
5bf970f9 | 208 | |
f6ac5f3d | 209 | detach_success (inf); |
ced2dffb PA |
210 | } |
211 | ||
212 | /* See inf-ptrace.h. */ | |
213 | ||
214 | void | |
f6ac5f3d | 215 | inf_ptrace_target::detach_success (inferior *inf) |
ced2dffb | 216 | { |
6155c136 | 217 | switch_to_no_thread (); |
bc09b0c1 | 218 | detach_inferior (inf); |
7a7d3353 | 219 | |
f6ac5f3d | 220 | maybe_unpush_target (); |
5bf970f9 AC |
221 | } |
222 | ||
4b8a1a28 MK |
223 | /* Kill the inferior. */ |
224 | ||
f6ac5f3d PA |
225 | void |
226 | inf_ptrace_target::kill () | |
5bf970f9 | 227 | { |
e99b03dc | 228 | pid_t pid = inferior_ptid.pid (); |
c7c14b96 | 229 | int status; |
c7c14b96 MK |
230 | |
231 | if (pid == 0) | |
232 | return; | |
233 | ||
4b8a1a28 MK |
234 | ptrace (PT_KILL, pid, (PTRACE_TYPE_ARG3)0, 0); |
235 | waitpid (pid, &status, 0); | |
236 | ||
bc1e6c81 | 237 | target_mourn_inferior (inferior_ptid); |
5bf970f9 AC |
238 | } |
239 | ||
f09db380 KR |
240 | #ifndef __NetBSD__ |
241 | ||
242 | /* See inf-ptrace.h. */ | |
90ad5e1d | 243 | |
94309df7 | 244 | pid_t |
90ad5e1d PA |
245 | get_ptrace_pid (ptid_t ptid) |
246 | { | |
247 | pid_t pid; | |
248 | ||
249 | /* If we have an LWPID to work with, use it. Otherwise, we're | |
250 | dealing with a non-threaded program/target. */ | |
e38504b3 | 251 | pid = ptid.lwp (); |
90ad5e1d | 252 | if (pid == 0) |
e99b03dc | 253 | pid = ptid.pid (); |
90ad5e1d PA |
254 | return pid; |
255 | } | |
f09db380 | 256 | #endif |
90ad5e1d | 257 | |
4b8a1a28 MK |
258 | /* Resume execution of thread PTID, or all threads if PTID is -1. If |
259 | STEP is nonzero, single-step it. If SIGNAL is nonzero, give it | |
260 | that signal. */ | |
5bf970f9 | 261 | |
f6ac5f3d PA |
262 | void |
263 | inf_ptrace_target::resume (ptid_t ptid, int step, enum gdb_signal signal) | |
5bf970f9 | 264 | { |
f09db380 | 265 | PTRACE_TYPE_ARG1 request; |
c7c14b96 | 266 | |
d7e15655 | 267 | if (minus_one_ptid == ptid) |
4b8a1a28 MK |
268 | /* Resume all threads. Traditionally ptrace() only supports |
269 | single-threaded processes, so simply resume the inferior. */ | |
f09db380 | 270 | ptid = ptid_t (inferior_ptid.pid ()); |
c7c14b96 | 271 | |
a96d9b2e SDJ |
272 | if (catch_syscall_enabled () > 0) |
273 | request = PT_SYSCALL; | |
274 | else | |
275 | request = PT_CONTINUE; | |
276 | ||
c7c14b96 MK |
277 | if (step) |
278 | { | |
279 | /* If this system does not support PT_STEP, a higher level | |
7da6a5b9 LM |
280 | function will have called the appropriate functions to transmute the |
281 | step request into a continue request (by setting breakpoints on | |
282 | all possible successor instructions), so we don't have to | |
283 | worry about that here. */ | |
c7c14b96 MK |
284 | request = PT_STEP; |
285 | } | |
286 | ||
287 | /* An address of (PTRACE_TYPE_ARG3)1 tells ptrace to continue from | |
288 | where it was. If GDB wanted it to start some other way, we have | |
4b8a1a28 | 289 | already written a new program counter value to the child. */ |
c7c14b96 | 290 | errno = 0; |
f09db380 | 291 | gdb_ptrace (request, ptid, (PTRACE_TYPE_ARG3)1, gdb_signal_to_host (signal)); |
c7c14b96 MK |
292 | if (errno != 0) |
293 | perror_with_name (("ptrace")); | |
5bf970f9 AC |
294 | } |
295 | ||
4b8a1a28 MK |
296 | /* Wait for the child specified by PTID to do something. Return the |
297 | process ID of the child, or MINUS_ONE_PTID in case of error; store | |
298 | the status in *OURSTATUS. */ | |
5bf970f9 | 299 | |
f6ac5f3d PA |
300 | ptid_t |
301 | inf_ptrace_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus, | |
b60cea74 | 302 | target_wait_flags options) |
5bf970f9 | 303 | { |
4b8a1a28 MK |
304 | pid_t pid; |
305 | int status, save_errno; | |
5bf970f9 | 306 | |
c7c14b96 MK |
307 | do |
308 | { | |
4b8a1a28 | 309 | set_sigint_trap (); |
5bf970f9 | 310 | |
4b8a1a28 MK |
311 | do |
312 | { | |
e99b03dc | 313 | pid = waitpid (ptid.pid (), &status, 0); |
4b8a1a28 MK |
314 | save_errno = errno; |
315 | } | |
316 | while (pid == -1 && errno == EINTR); | |
5bf970f9 | 317 | |
c7c14b96 | 318 | clear_sigint_trap (); |
5bf970f9 | 319 | |
c7c14b96 MK |
320 | if (pid == -1) |
321 | { | |
c7c14b96 | 322 | fprintf_unfiltered (gdb_stderr, |
4b8a1a28 | 323 | _("Child process unexpectedly missing: %s.\n"), |
c7c14b96 MK |
324 | safe_strerror (save_errno)); |
325 | ||
326 | /* Claim it exited with unknown signal. */ | |
183be222 | 327 | ourstatus->set_signalled (GDB_SIGNAL_UNKNOWN); |
fb66883a | 328 | return inferior_ptid; |
c7c14b96 MK |
329 | } |
330 | ||
4b8a1a28 | 331 | /* Ignore terminated detached child processes. */ |
f37e5866 | 332 | if (!WIFSTOPPED (status) && find_inferior_pid (this, pid) == nullptr) |
4b8a1a28 | 333 | pid = -1; |
c7c14b96 | 334 | } |
4b8a1a28 | 335 | while (pid == -1); |
c7c14b96 | 336 | |
7509b829 SM |
337 | *ourstatus = host_status_to_waitstatus (status); |
338 | ||
f2907e49 | 339 | return ptid_t (pid); |
5bf970f9 AC |
340 | } |
341 | ||
87c336f6 AA |
342 | /* Transfer data via ptrace into process PID's memory from WRITEBUF, or |
343 | from process PID's memory into READBUF. Start at target address ADDR | |
344 | and transfer up to LEN bytes. Exactly one of READBUF and WRITEBUF must | |
345 | be non-null. Return the number of transferred bytes. */ | |
346 | ||
347 | static ULONGEST | |
f09db380 | 348 | inf_ptrace_peek_poke (ptid_t ptid, gdb_byte *readbuf, |
87c336f6 AA |
349 | const gdb_byte *writebuf, |
350 | ULONGEST addr, ULONGEST len) | |
351 | { | |
352 | ULONGEST n; | |
353 | unsigned int chunk; | |
354 | ||
355 | /* We transfer aligned words. Thus align ADDR down to a word | |
356 | boundary and determine how many bytes to skip at the | |
357 | beginning. */ | |
28f1c605 | 358 | ULONGEST skip = addr & (sizeof (PTRACE_TYPE_RET) - 1); |
87c336f6 AA |
359 | addr -= skip; |
360 | ||
361 | for (n = 0; | |
362 | n < len; | |
363 | n += chunk, addr += sizeof (PTRACE_TYPE_RET), skip = 0) | |
364 | { | |
365 | /* Restrict to a chunk that fits in the current word. */ | |
366 | chunk = std::min (sizeof (PTRACE_TYPE_RET) - skip, len - n); | |
367 | ||
368 | /* Use a union for type punning. */ | |
369 | union | |
370 | { | |
371 | PTRACE_TYPE_RET word; | |
372 | gdb_byte byte[sizeof (PTRACE_TYPE_RET)]; | |
373 | } buf; | |
374 | ||
375 | /* Read the word, also when doing a partial word write. */ | |
376 | if (readbuf != NULL || chunk < sizeof (PTRACE_TYPE_RET)) | |
377 | { | |
378 | errno = 0; | |
f09db380 KR |
379 | buf.word = gdb_ptrace (PT_READ_I, ptid, |
380 | (PTRACE_TYPE_ARG3)(uintptr_t) addr, 0); | |
87c336f6 AA |
381 | if (errno != 0) |
382 | break; | |
383 | if (readbuf != NULL) | |
384 | memcpy (readbuf + n, buf.byte + skip, chunk); | |
385 | } | |
386 | if (writebuf != NULL) | |
387 | { | |
388 | memcpy (buf.byte + skip, writebuf + n, chunk); | |
389 | errno = 0; | |
f09db380 | 390 | gdb_ptrace (PT_WRITE_D, ptid, (PTRACE_TYPE_ARG3)(uintptr_t) addr, |
87c336f6 AA |
391 | buf.word); |
392 | if (errno != 0) | |
393 | { | |
394 | /* Using the appropriate one (I or D) is necessary for | |
395 | Gould NP1, at least. */ | |
396 | errno = 0; | |
f09db380 KR |
397 | gdb_ptrace (PT_WRITE_I, ptid, (PTRACE_TYPE_ARG3)(uintptr_t) addr, |
398 | buf.word); | |
87c336f6 AA |
399 | if (errno != 0) |
400 | break; | |
401 | } | |
402 | } | |
403 | } | |
404 | ||
405 | return n; | |
406 | } | |
407 | ||
edcc890f | 408 | /* Implement the to_xfer_partial target_ops method. */ |
5bf970f9 | 409 | |
f6ac5f3d PA |
410 | enum target_xfer_status |
411 | inf_ptrace_target::xfer_partial (enum target_object object, | |
412 | const char *annex, gdb_byte *readbuf, | |
413 | const gdb_byte *writebuf, | |
414 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) | |
5bf970f9 | 415 | { |
f09db380 | 416 | ptid_t ptid = inferior_ptid; |
4b8a1a28 | 417 | |
5bf970f9 AC |
418 | switch (object) |
419 | { | |
420 | case TARGET_OBJECT_MEMORY: | |
f929a579 AC |
421 | #ifdef PT_IO |
422 | /* OpenBSD 3.1, NetBSD 1.6 and FreeBSD 5.0 have a new PT_IO | |
423 | request that promises to be much more efficient in reading | |
424 | and writing data in the traced process's address space. */ | |
425 | { | |
426 | struct ptrace_io_desc piod; | |
4b8a1a28 | 427 | |
f929a579 | 428 | /* NOTE: We assume that there are no distinct address spaces |
b457b3dd MK |
429 | for instruction and data. However, on OpenBSD 3.9 and |
430 | later, PIOD_WRITE_D doesn't allow changing memory that's | |
431 | mapped read-only. Since most code segments will be | |
432 | read-only, using PIOD_WRITE_D will prevent us from | |
433 | inserting breakpoints, so we use PIOD_WRITE_I instead. */ | |
434 | piod.piod_op = writebuf ? PIOD_WRITE_I : PIOD_READ_D; | |
f929a579 AC |
435 | piod.piod_addr = writebuf ? (void *) writebuf : readbuf; |
436 | piod.piod_offs = (void *) (long) offset; | |
437 | piod.piod_len = len; | |
438 | ||
439 | errno = 0; | |
f09db380 | 440 | if (gdb_ptrace (PT_IO, ptid, (caddr_t)&piod, 0) == 0) |
9b409511 | 441 | { |
9b409511 | 442 | /* Return the actual number of bytes read or written. */ |
493443a4 MK |
443 | *xfered_len = piod.piod_len; |
444 | return (piod.piod_len == 0) ? TARGET_XFER_EOF : TARGET_XFER_OK; | |
9b409511 | 445 | } |
f929a579 AC |
446 | /* If the PT_IO request is somehow not supported, fallback on |
447 | using PT_WRITE_D/PT_READ_D. Otherwise we will return zero | |
448 | to indicate failure. */ | |
449 | if (errno != EINVAL) | |
9b409511 | 450 | return TARGET_XFER_EOF; |
f929a579 AC |
451 | } |
452 | #endif | |
f09db380 | 453 | *xfered_len = inf_ptrace_peek_poke (ptid, readbuf, writebuf, |
87c336f6 AA |
454 | offset, len); |
455 | return *xfered_len != 0 ? TARGET_XFER_OK : TARGET_XFER_EOF; | |
5bf970f9 AC |
456 | |
457 | case TARGET_OBJECT_UNWIND_TABLE: | |
2ed4b548 | 458 | return TARGET_XFER_E_IO; |
5bf970f9 AC |
459 | |
460 | case TARGET_OBJECT_AUXV: | |
e8ace1c0 MK |
461 | #if defined (PT_IO) && defined (PIOD_READ_AUXV) |
462 | /* OpenBSD 4.5 has a new PIOD_READ_AUXV operation for the PT_IO | |
463 | request that allows us to read the auxilliary vector. Other | |
464 | BSD's may follow if they feel the need to support PIE. */ | |
465 | { | |
466 | struct ptrace_io_desc piod; | |
467 | ||
468 | if (writebuf) | |
2ed4b548 | 469 | return TARGET_XFER_E_IO; |
e8ace1c0 MK |
470 | piod.piod_op = PIOD_READ_AUXV; |
471 | piod.piod_addr = readbuf; | |
472 | piod.piod_offs = (void *) (long) offset; | |
473 | piod.piod_len = len; | |
474 | ||
475 | errno = 0; | |
f09db380 | 476 | if (gdb_ptrace (PT_IO, ptid, (caddr_t)&piod, 0) == 0) |
9b409511 | 477 | { |
9b409511 | 478 | /* Return the actual number of bytes read or written. */ |
493443a4 MK |
479 | *xfered_len = piod.piod_len; |
480 | return (piod.piod_len == 0) ? TARGET_XFER_EOF : TARGET_XFER_OK; | |
9b409511 | 481 | } |
e8ace1c0 MK |
482 | } |
483 | #endif | |
2ed4b548 | 484 | return TARGET_XFER_E_IO; |
5bf970f9 AC |
485 | |
486 | case TARGET_OBJECT_WCOOKIE: | |
2ed4b548 | 487 | return TARGET_XFER_E_IO; |
5bf970f9 AC |
488 | |
489 | default: | |
2ed4b548 | 490 | return TARGET_XFER_E_IO; |
5bf970f9 AC |
491 | } |
492 | } | |
493 | ||
4b8a1a28 | 494 | /* Return non-zero if the thread specified by PTID is alive. */ |
c7c14b96 | 495 | |
57810aa7 | 496 | bool |
f6ac5f3d | 497 | inf_ptrace_target::thread_alive (ptid_t ptid) |
c7c14b96 | 498 | { |
4b8a1a28 | 499 | /* ??? Is kill the right way to do this? */ |
e99b03dc | 500 | return (::kill (ptid.pid (), 0) != -1); |
c7c14b96 MK |
501 | } |
502 | ||
503 | /* Print status information about what we're accessing. */ | |
504 | ||
f6ac5f3d PA |
505 | void |
506 | inf_ptrace_target::files_info () | |
c7c14b96 | 507 | { |
181e7f93 PA |
508 | struct inferior *inf = current_inferior (); |
509 | ||
4b8a1a28 | 510 | printf_filtered (_("\tUsing the running image of %s %s.\n"), |
181e7f93 | 511 | inf->attach_flag ? "attached" : "child", |
a068643d | 512 | target_pid_to_str (inferior_ptid).c_str ()); |
5bf970f9 AC |
513 | } |
514 | ||
a068643d | 515 | std::string |
f6ac5f3d | 516 | inf_ptrace_target::pid_to_str (ptid_t ptid) |
117de6a9 PA |
517 | { |
518 | return normal_pid_to_str (ptid); | |
519 | } |