Commit | Line | Data |
---|---|---|
ac8c974e AR |
1 | /* QNX Neutrino specific low level interface, for the remote server |
2 | for GDB. | |
b811d2c2 | 3 | Copyright (C) 2009-2020 Free Software Foundation, Inc. |
ac8c974e AR |
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 | |
9 | the Free Software Foundation; either version 3 of the License, or | |
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 | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | ||
21 | #include "server.h" | |
623b6bdf | 22 | #include "gdbthread.h" |
ac8c974e | 23 | #include "nto-low.h" |
533b0600 | 24 | #include "hostio.h" |
f9d949fb | 25 | #include "debug.h" |
ac8c974e AR |
26 | |
27 | #include <limits.h> | |
28 | #include <fcntl.h> | |
29 | #include <spawn.h> | |
30 | #include <sys/procfs.h> | |
31 | #include <sys/auxv.h> | |
ac8c974e AR |
32 | #include <sys/iomgr.h> |
33 | #include <sys/neutrino.h> | |
34 | ||
35 | ||
ac8c974e AR |
36 | int using_threads = 1; |
37 | ||
3aee8918 PA |
38 | const struct target_desc *nto_tdesc; |
39 | ||
ac8c974e AR |
40 | static void |
41 | nto_trace (const char *fmt, ...) | |
42 | { | |
43 | va_list arg_list; | |
44 | ||
45 | if (debug_threads == 0) | |
46 | return; | |
47 | fprintf (stderr, "nto:"); | |
48 | va_start (arg_list, fmt); | |
49 | vfprintf (stderr, fmt, arg_list); | |
50 | va_end (arg_list); | |
51 | } | |
52 | ||
53 | #define TRACE nto_trace | |
54 | ||
55 | /* Structure holding neutrino specific information about | |
56 | inferior. */ | |
57 | ||
58 | struct nto_inferior | |
59 | { | |
60 | char nto_procfs_path[PATH_MAX]; | |
61 | int ctl_fd; | |
62 | pid_t pid; | |
63 | int exit_signo; /* For tracking exit status. */ | |
64 | }; | |
65 | ||
66 | static struct nto_inferior nto_inferior; | |
67 | ||
68 | static void | |
69 | init_nto_inferior (struct nto_inferior *nto_inferior) | |
70 | { | |
71 | memset (nto_inferior, 0, sizeof (struct nto_inferior)); | |
72 | nto_inferior->ctl_fd = -1; | |
73 | nto_inferior->pid = -1; | |
74 | } | |
75 | ||
76 | static void | |
77 | do_detach (void) | |
78 | { | |
79 | if (nto_inferior.ctl_fd != -1) | |
80 | { | |
81 | nto_trace ("Closing fd\n"); | |
82 | close (nto_inferior.ctl_fd); | |
83 | init_nto_inferior (&nto_inferior); | |
84 | } | |
85 | } | |
86 | ||
87 | /* Set current thread. Return 1 on success, 0 otherwise. */ | |
88 | ||
89 | static int | |
90 | nto_set_thread (ptid_t ptid) | |
91 | { | |
92 | int res = 0; | |
93 | ||
e99b03dc | 94 | TRACE ("%s pid: %d tid: %ld\n", __func__, ptid.pid (), |
e38504b3 | 95 | ptid.lwp ()); |
ac8c974e | 96 | if (nto_inferior.ctl_fd != -1 |
d7e15655 TT |
97 | && ptid != null_ptid |
98 | && ptid != minus_one_ptid) | |
ac8c974e | 99 | { |
e38504b3 | 100 | pthread_t tid = ptid.lwp (); |
ac8c974e AR |
101 | |
102 | if (EOK == devctl (nto_inferior.ctl_fd, DCMD_PROC_CURTHREAD, &tid, | |
103 | sizeof (tid), 0)) | |
104 | res = 1; | |
105 | else | |
106 | TRACE ("%s: Error: failed to set current thread\n", __func__); | |
107 | } | |
108 | return res; | |
109 | } | |
110 | ||
111 | /* This function will determine all alive threads. Note that we do not list | |
112 | dead but unjoined threads even though they are still in the process' thread | |
113 | list. | |
114 | ||
115 | NTO_INFERIOR must not be NULL. */ | |
116 | ||
117 | static void | |
118 | nto_find_new_threads (struct nto_inferior *nto_inferior) | |
119 | { | |
120 | pthread_t tid; | |
121 | ||
122 | TRACE ("%s pid:%d\n", __func__, nto_inferior->pid); | |
123 | ||
124 | if (nto_inferior->ctl_fd == -1) | |
125 | return; | |
126 | ||
127 | for (tid = 1;; ++tid) | |
128 | { | |
129 | procfs_status status; | |
130 | ptid_t ptid; | |
131 | int err; | |
132 | ||
133 | status.tid = tid; | |
134 | err = devctl (nto_inferior->ctl_fd, DCMD_PROC_TIDSTATUS, &status, | |
135 | sizeof (status), 0); | |
136 | ||
137 | if (err != EOK || status.tid == 0) | |
138 | break; | |
139 | ||
140 | /* All threads in between are gone. */ | |
141 | while (tid != status.tid || status.state == STATE_DEAD) | |
142 | { | |
143 | struct thread_info *ti; | |
144 | ||
fd79271b | 145 | ptid = ptid_t (nto_inferior->pid, tid, 0); |
ac8c974e AR |
146 | ti = find_thread_ptid (ptid); |
147 | if (ti != NULL) | |
148 | { | |
149 | TRACE ("Removing thread %d\n", tid); | |
150 | remove_thread (ti); | |
151 | } | |
152 | if (tid == status.tid) | |
153 | break; | |
154 | ++tid; | |
155 | } | |
156 | ||
157 | if (status.state != STATE_DEAD) | |
158 | { | |
159 | TRACE ("Adding thread %d\n", tid); | |
fd79271b | 160 | ptid = ptid_t (nto_inferior->pid, tid, 0); |
ac8c974e AR |
161 | if (!find_thread_ptid (ptid)) |
162 | add_thread (ptid, NULL); | |
163 | } | |
164 | } | |
165 | } | |
166 | ||
167 | /* Given pid, open procfs path. */ | |
168 | ||
169 | static pid_t | |
170 | do_attach (pid_t pid) | |
171 | { | |
172 | procfs_status status; | |
173 | struct sigevent event; | |
174 | ||
175 | if (nto_inferior.ctl_fd != -1) | |
176 | { | |
177 | close (nto_inferior.ctl_fd); | |
178 | init_nto_inferior (&nto_inferior); | |
179 | } | |
6cebaf6e | 180 | xsnprintf (nto_inferior.nto_procfs_path, PATH_MAX - 1, "/proc/%d/as", pid); |
ac8c974e AR |
181 | nto_inferior.ctl_fd = open (nto_inferior.nto_procfs_path, O_RDWR); |
182 | if (nto_inferior.ctl_fd == -1) | |
183 | { | |
184 | TRACE ("Failed to open %s\n", nto_inferior.nto_procfs_path); | |
185 | init_nto_inferior (&nto_inferior); | |
186 | return -1; | |
187 | } | |
188 | if (devctl (nto_inferior.ctl_fd, DCMD_PROC_STOP, &status, sizeof (status), 0) | |
189 | != EOK) | |
190 | { | |
191 | do_detach (); | |
192 | return -1; | |
193 | } | |
194 | nto_inferior.pid = pid; | |
195 | /* Define a sigevent for process stopped notification. */ | |
196 | event.sigev_notify = SIGEV_SIGNAL_THREAD; | |
197 | event.sigev_signo = SIGUSR1; | |
198 | event.sigev_code = 0; | |
199 | event.sigev_value.sival_ptr = NULL; | |
200 | event.sigev_priority = -1; | |
201 | devctl (nto_inferior.ctl_fd, DCMD_PROC_EVENT, &event, sizeof (event), 0); | |
202 | ||
203 | if (devctl (nto_inferior.ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), | |
204 | 0) == EOK | |
205 | && (status.flags & _DEBUG_FLAG_STOPPED)) | |
206 | { | |
207 | ptid_t ptid; | |
3aee8918 | 208 | struct process_info *proc; |
ac8c974e AR |
209 | |
210 | kill (pid, SIGCONT); | |
fd79271b | 211 | ptid = ptid_t (status.pid, status.tid, 0); |
ac8c974e | 212 | the_low_target.arch_setup (); |
3aee8918 PA |
213 | proc = add_process (status.pid, 1); |
214 | proc->tdesc = nto_tdesc; | |
ac8c974e | 215 | TRACE ("Adding thread: pid=%d tid=%ld\n", status.pid, |
e38504b3 | 216 | ptid.lwp ()); |
ac8c974e AR |
217 | nto_find_new_threads (&nto_inferior); |
218 | } | |
219 | else | |
220 | { | |
221 | do_detach (); | |
222 | return -1; | |
223 | } | |
224 | ||
225 | return pid; | |
226 | } | |
227 | ||
228 | /* Read or write LEN bytes from/to inferior's MEMADDR memory address | |
229 | into gdbservers's MYADDR buffer. Return number of bytes actually | |
230 | transfered. */ | |
231 | ||
232 | static int | |
233 | nto_xfer_memory (off_t memaddr, unsigned char *myaddr, int len, | |
234 | int dowrite) | |
235 | { | |
236 | int nbytes = 0; | |
237 | ||
238 | if (lseek (nto_inferior.ctl_fd, memaddr, SEEK_SET) == memaddr) | |
239 | { | |
240 | if (dowrite) | |
241 | nbytes = write (nto_inferior.ctl_fd, myaddr, len); | |
242 | else | |
243 | nbytes = read (nto_inferior.ctl_fd, myaddr, len); | |
244 | if (nbytes < 0) | |
245 | nbytes = 0; | |
246 | } | |
247 | if (nbytes == 0) | |
248 | { | |
249 | int e = errno; | |
6d91ce9a | 250 | TRACE ("Error in %s : errno=%d (%s)\n", __func__, e, safe_strerror (e)); |
ac8c974e AR |
251 | } |
252 | return nbytes; | |
253 | } | |
254 | ||
255 | /* Insert or remove breakpoint or watchpoint at address ADDR. | |
256 | TYPE can be one of Neutrino breakpoint types. SIZE must be 0 for | |
257 | inserting the point, -1 for removing it. | |
258 | ||
259 | Return 0 on success, 1 otherwise. */ | |
260 | ||
261 | static int | |
262 | nto_breakpoint (CORE_ADDR addr, int type, int size) | |
263 | { | |
264 | procfs_break brk; | |
265 | ||
266 | brk.type = type; | |
267 | brk.addr = addr; | |
268 | brk.size = size; | |
269 | if (devctl (nto_inferior.ctl_fd, DCMD_PROC_BREAK, &brk, sizeof (brk), 0) | |
270 | != EOK) | |
271 | return 1; | |
272 | return 0; | |
273 | } | |
274 | ||
275 | /* Read auxiliary vector from inferior's initial stack into gdbserver's | |
276 | MYADDR buffer, up to LEN bytes. | |
277 | ||
278 | Return number of bytes read. */ | |
279 | ||
280 | static int | |
281 | nto_read_auxv_from_initial_stack (CORE_ADDR initial_stack, | |
282 | unsigned char *myaddr, | |
283 | unsigned int len) | |
284 | { | |
285 | int data_ofs = 0; | |
286 | int anint; | |
287 | unsigned int len_read = 0; | |
288 | ||
289 | /* Skip over argc, argv and envp... Comment from ldd.c: | |
290 | ||
291 | The startup frame is set-up so that we have: | |
292 | auxv | |
293 | NULL | |
294 | ... | |
295 | envp2 | |
296 | envp1 <----- void *frame + (argc + 2) * sizeof(char *) | |
297 | NULL | |
298 | ... | |
299 | argv2 | |
300 | argv1 | |
301 | argc <------ void * frame | |
302 | ||
303 | On entry to ldd, frame gives the address of argc on the stack. */ | |
304 | if (nto_xfer_memory (initial_stack, (unsigned char *)&anint, | |
305 | sizeof (anint), 0) != sizeof (anint)) | |
306 | return 0; | |
307 | ||
308 | /* Size of pointer is assumed to be 4 bytes (32 bit arch. ) */ | |
309 | data_ofs += (anint + 2) * sizeof (void *); /* + 2 comes from argc itself and | |
310 | NULL terminating pointer in | |
311 | argv. */ | |
312 | ||
313 | /* Now loop over env table: */ | |
314 | while (nto_xfer_memory (initial_stack + data_ofs, | |
315 | (unsigned char *)&anint, sizeof (anint), 0) | |
316 | == sizeof (anint)) | |
317 | { | |
318 | data_ofs += sizeof (anint); | |
319 | if (anint == 0) | |
320 | break; | |
321 | } | |
322 | initial_stack += data_ofs; | |
323 | ||
324 | memset (myaddr, 0, len); | |
325 | while (len_read <= len - sizeof (auxv_t)) | |
326 | { | |
327 | auxv_t *auxv = (auxv_t *)myaddr; | |
328 | ||
329 | /* Search backwards until we have read AT_PHDR (num. 3), | |
330 | AT_PHENT (num 4), AT_PHNUM (num 5) */ | |
331 | if (nto_xfer_memory (initial_stack, (unsigned char *)auxv, | |
332 | sizeof (auxv_t), 0) == sizeof (auxv_t)) | |
333 | { | |
334 | if (auxv->a_type != AT_NULL) | |
335 | { | |
336 | auxv++; | |
337 | len_read += sizeof (auxv_t); | |
338 | } | |
339 | if (auxv->a_type == AT_PHNUM) /* That's all we need. */ | |
340 | break; | |
341 | initial_stack += sizeof (auxv_t); | |
342 | } | |
343 | else | |
344 | break; | |
345 | } | |
346 | TRACE ("auxv: len_read: %d\n", len_read); | |
347 | return len_read; | |
348 | } | |
349 | ||
2090129c SDJ |
350 | /* Start inferior specified by PROGRAM, using PROGRAM_ARGS as its |
351 | arguments. */ | |
ac8c974e | 352 | |
15295543 TBA |
353 | int |
354 | nto_process_target::create_inferior (const char *program, | |
355 | const std::vector<char *> &program_args) | |
ac8c974e AR |
356 | { |
357 | struct inheritance inherit; | |
358 | pid_t pid; | |
359 | sigset_t set; | |
2090129c | 360 | std::string str_program_args = stringify_argv (program_args); |
ac8c974e AR |
361 | |
362 | TRACE ("%s %s\n", __func__, program); | |
363 | /* Clear any pending SIGUSR1's but keep the behavior the same. */ | |
364 | signal (SIGUSR1, signal (SIGUSR1, SIG_IGN)); | |
365 | ||
366 | sigemptyset (&set); | |
367 | sigaddset (&set, SIGUSR1); | |
368 | sigprocmask (SIG_UNBLOCK, &set, NULL); | |
369 | ||
370 | memset (&inherit, 0, sizeof (inherit)); | |
371 | inherit.flags |= SPAWN_SETGROUP | SPAWN_HOLD; | |
372 | inherit.pgroup = SPAWN_NEWPGROUP; | |
2090129c SDJ |
373 | pid = spawnp (program, 0, NULL, &inherit, |
374 | (char *) str_program_args.c_str (), 0); | |
ac8c974e AR |
375 | sigprocmask (SIG_BLOCK, &set, NULL); |
376 | ||
377 | if (pid == -1) | |
378 | return -1; | |
379 | ||
380 | if (do_attach (pid) != pid) | |
381 | return -1; | |
382 | ||
383 | return pid; | |
384 | } | |
385 | ||
386 | /* Attach to process PID. */ | |
387 | ||
ef03dad8 TBA |
388 | int |
389 | nto_process_target::attach (unsigned long pid) | |
ac8c974e AR |
390 | { |
391 | TRACE ("%s %ld\n", __func__, pid); | |
392 | if (do_attach (pid) != pid) | |
393 | error ("Unable to attach to %ld\n", pid); | |
394 | return 0; | |
395 | } | |
396 | ||
397 | /* Send signal to process PID. */ | |
398 | ||
c6885a57 TBA |
399 | int |
400 | nto_process_target::kill (process_info *proc) | |
ac8c974e | 401 | { |
a780ef4f PA |
402 | int pid = proc->pid; |
403 | ||
ac8c974e AR |
404 | TRACE ("%s %d\n", __func__, pid); |
405 | kill (pid, SIGKILL); | |
406 | do_detach (); | |
407 | return 0; | |
408 | } | |
409 | ||
410 | /* Detach from process PID. */ | |
411 | ||
9061c9cf TBA |
412 | int |
413 | nto_process_target::detach (process_info *proc) | |
ac8c974e | 414 | { |
ef2ddb33 | 415 | TRACE ("%s %d\n", __func__, proc->pid); |
ac8c974e AR |
416 | do_detach (); |
417 | return 0; | |
418 | } | |
419 | ||
8adb37b9 TBA |
420 | void |
421 | nto_process_target::mourn (struct process_info *process) | |
505106cd PA |
422 | { |
423 | remove_process (process); | |
424 | } | |
425 | ||
95a49a39 TBA |
426 | void |
427 | nto_process_target::join (int pid) | |
428 | { | |
429 | error (_("nto target does not implement the join op")); | |
430 | } | |
431 | ||
ac8c974e AR |
432 | /* Check if the given thread is alive. |
433 | ||
13d3d99b | 434 | Return true if alive, false otherwise. */ |
ac8c974e | 435 | |
13d3d99b TBA |
436 | bool |
437 | nto_process_target::thread_alive (ptid_t ptid) | |
ac8c974e AR |
438 | { |
439 | int res; | |
440 | ||
e99b03dc | 441 | TRACE ("%s pid:%d tid:%d\n", __func__, ptid.pid (), |
e38504b3 TT |
442 | ptid.lwp ()); |
443 | if (SignalKill (0, ptid.pid (), ptid.lwp (), | |
ac8c974e AR |
444 | 0, 0, 0) == -1) |
445 | res = 0; | |
446 | else | |
447 | res = 1; | |
448 | TRACE ("%s: %s\n", __func__, res ? "yes" : "no"); | |
449 | return res; | |
450 | } | |
451 | ||
452 | /* Resume inferior's execution. */ | |
453 | ||
454 | static void | |
455 | nto_resume (struct thread_resume *resume_info, size_t n) | |
456 | { | |
457 | /* We can only work in all-stop mode. */ | |
458 | procfs_status status; | |
459 | procfs_run run; | |
460 | int err; | |
461 | ||
462 | TRACE ("%s\n", __func__); | |
463 | /* Workaround for aliasing rules violation. */ | |
464 | sigset_t *run_fault = (sigset_t *) (void *) &run.fault; | |
465 | ||
466 | nto_set_thread (resume_info->thread); | |
467 | ||
468 | run.flags = _DEBUG_RUN_FAULT | _DEBUG_RUN_TRACE; | |
469 | if (resume_info->kind == resume_step) | |
470 | run.flags |= _DEBUG_RUN_STEP; | |
471 | run.flags |= _DEBUG_RUN_ARM; | |
472 | ||
473 | sigemptyset (run_fault); | |
474 | sigaddset (run_fault, FLTBPT); | |
475 | sigaddset (run_fault, FLTTRACE); | |
476 | sigaddset (run_fault, FLTILL); | |
477 | sigaddset (run_fault, FLTPRIV); | |
478 | sigaddset (run_fault, FLTBOUNDS); | |
479 | sigaddset (run_fault, FLTIOVF); | |
480 | sigaddset (run_fault, FLTIZDIV); | |
481 | sigaddset (run_fault, FLTFPE); | |
482 | sigaddset (run_fault, FLTPAGE); | |
483 | sigaddset (run_fault, FLTSTACK); | |
484 | sigaddset (run_fault, FLTACCESS); | |
485 | ||
486 | sigemptyset (&run.trace); | |
487 | if (resume_info->sig) | |
488 | { | |
489 | int signal_to_pass; | |
490 | ||
491 | devctl (nto_inferior.ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), | |
492 | 0); | |
493 | signal_to_pass = resume_info->sig; | |
494 | if (status.why & (_DEBUG_WHY_SIGNALLED | _DEBUG_WHY_FAULTED)) | |
495 | { | |
496 | if (signal_to_pass != status.info.si_signo) | |
497 | { | |
498 | kill (status.pid, signal_to_pass); | |
499 | run.flags |= _DEBUG_RUN_CLRFLT | _DEBUG_RUN_CLRSIG; | |
500 | } | |
501 | else /* Let it kill the program without telling us. */ | |
502 | sigdelset (&run.trace, signal_to_pass); | |
503 | } | |
504 | } | |
505 | else | |
506 | run.flags |= _DEBUG_RUN_CLRSIG | _DEBUG_RUN_CLRFLT; | |
507 | ||
508 | sigfillset (&run.trace); | |
509 | ||
510 | regcache_invalidate (); | |
511 | ||
512 | err = devctl (nto_inferior.ctl_fd, DCMD_PROC_RUN, &run, sizeof (run), 0); | |
513 | if (err != EOK) | |
6d91ce9a | 514 | TRACE ("Error: %d \"%s\"\n", err, safe_strerror (err)); |
ac8c974e AR |
515 | } |
516 | ||
517 | /* Wait for inferior's event. | |
518 | ||
519 | Return ptid of thread that caused the event. */ | |
520 | ||
521 | static ptid_t | |
522 | nto_wait (ptid_t ptid, | |
523 | struct target_waitstatus *ourstatus, int target_options) | |
524 | { | |
525 | sigset_t set; | |
526 | siginfo_t info; | |
527 | procfs_status status; | |
528 | const int trace_mask = (_DEBUG_FLAG_TRACE_EXEC | _DEBUG_FLAG_TRACE_RD | |
529 | | _DEBUG_FLAG_TRACE_WR | _DEBUG_FLAG_TRACE_MODIFY); | |
530 | ||
531 | TRACE ("%s\n", __func__); | |
532 | ||
533 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
534 | ||
535 | sigemptyset (&set); | |
536 | sigaddset (&set, SIGUSR1); | |
537 | ||
538 | devctl (nto_inferior.ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0); | |
539 | while (!(status.flags & _DEBUG_FLAG_ISTOP)) | |
540 | { | |
541 | sigwaitinfo (&set, &info); | |
542 | devctl (nto_inferior.ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), | |
543 | 0); | |
544 | } | |
545 | nto_find_new_threads (&nto_inferior); | |
546 | ||
547 | if (status.flags & _DEBUG_FLAG_SSTEP) | |
548 | { | |
549 | TRACE ("SSTEP\n"); | |
550 | ourstatus->kind = TARGET_WAITKIND_STOPPED; | |
a493e3e2 | 551 | ourstatus->value.sig = GDB_SIGNAL_TRAP; |
ac8c974e AR |
552 | } |
553 | /* Was it a breakpoint? */ | |
554 | else if (status.flags & trace_mask) | |
555 | { | |
556 | TRACE ("STOPPED\n"); | |
557 | ourstatus->kind = TARGET_WAITKIND_STOPPED; | |
a493e3e2 | 558 | ourstatus->value.sig = GDB_SIGNAL_TRAP; |
ac8c974e AR |
559 | } |
560 | else if (status.flags & _DEBUG_FLAG_ISTOP) | |
561 | { | |
562 | TRACE ("ISTOP\n"); | |
563 | switch (status.why) | |
564 | { | |
565 | case _DEBUG_WHY_SIGNALLED: | |
566 | TRACE (" SIGNALLED\n"); | |
567 | ourstatus->kind = TARGET_WAITKIND_STOPPED; | |
568 | ourstatus->value.sig = | |
2ea28649 | 569 | gdb_signal_from_host (status.info.si_signo); |
ac8c974e AR |
570 | nto_inferior.exit_signo = ourstatus->value.sig; |
571 | break; | |
572 | case _DEBUG_WHY_FAULTED: | |
573 | TRACE (" FAULTED\n"); | |
574 | ourstatus->kind = TARGET_WAITKIND_STOPPED; | |
575 | if (status.info.si_signo == SIGTRAP) | |
576 | { | |
577 | ourstatus->value.sig = 0; | |
578 | nto_inferior.exit_signo = 0; | |
579 | } | |
580 | else | |
581 | { | |
582 | ourstatus->value.sig = | |
2ea28649 | 583 | gdb_signal_from_host (status.info.si_signo); |
ac8c974e AR |
584 | nto_inferior.exit_signo = ourstatus->value.sig; |
585 | } | |
586 | break; | |
587 | ||
588 | case _DEBUG_WHY_TERMINATED: | |
589 | { | |
590 | int waitval = 0; | |
591 | ||
592 | TRACE (" TERMINATED\n"); | |
e99b03dc | 593 | waitpid (ptid.pid (), &waitval, WNOHANG); |
ac8c974e AR |
594 | if (nto_inferior.exit_signo) |
595 | { | |
596 | /* Abnormal death. */ | |
597 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
598 | ourstatus->value.sig = nto_inferior.exit_signo; | |
599 | } | |
600 | else | |
601 | { | |
602 | /* Normal death. */ | |
603 | ourstatus->kind = TARGET_WAITKIND_EXITED; | |
604 | ourstatus->value.integer = WEXITSTATUS (waitval); | |
605 | } | |
606 | nto_inferior.exit_signo = 0; | |
607 | break; | |
608 | } | |
609 | ||
610 | case _DEBUG_WHY_REQUESTED: | |
611 | TRACE ("REQUESTED\n"); | |
612 | /* We are assuming a requested stop is due to a SIGINT. */ | |
613 | ourstatus->kind = TARGET_WAITKIND_STOPPED; | |
a493e3e2 | 614 | ourstatus->value.sig = GDB_SIGNAL_INT; |
ac8c974e AR |
615 | nto_inferior.exit_signo = 0; |
616 | break; | |
617 | } | |
618 | } | |
619 | ||
fd79271b | 620 | return ptid_t (status.pid, status.tid, 0); |
ac8c974e AR |
621 | } |
622 | ||
623 | /* Fetch inferior's registers for currently selected thread (CURRENT_INFERIOR). | |
624 | If REGNO is -1, fetch all registers, or REGNO register only otherwise. */ | |
625 | ||
626 | static void | |
442ea881 | 627 | nto_fetch_registers (struct regcache *regcache, int regno) |
ac8c974e AR |
628 | { |
629 | int regsize; | |
630 | procfs_greg greg; | |
ac8c974e AR |
631 | |
632 | TRACE ("%s (regno=%d)\n", __func__, regno); | |
633 | if (regno >= the_low_target.num_regs) | |
634 | return; | |
635 | ||
0bfdf32f | 636 | if (current_thread == NULL) |
ac8c974e | 637 | { |
0bfdf32f | 638 | TRACE ("current_thread is NULL\n"); |
ac8c974e AR |
639 | return; |
640 | } | |
124aceb4 | 641 | ptid_t ptid = ptid_of (current_thread); |
ac8c974e AR |
642 | if (!nto_set_thread (ptid)) |
643 | return; | |
644 | ||
645 | if (devctl (nto_inferior.ctl_fd, DCMD_PROC_GETGREG, &greg, sizeof (greg), | |
646 | ®size) == EOK) | |
647 | { | |
648 | if (regno == -1) /* All registers. */ | |
649 | { | |
650 | for (regno = 0; regno != the_low_target.num_regs; ++regno) | |
651 | { | |
652 | const unsigned int registeroffset | |
653 | = the_low_target.register_offset (regno); | |
493e2a69 MS |
654 | supply_register (regcache, regno, |
655 | ((char *)&greg) + registeroffset); | |
ac8c974e AR |
656 | } |
657 | } | |
658 | else | |
659 | { | |
660 | const unsigned int registeroffset | |
661 | = the_low_target.register_offset (regno); | |
662 | if (registeroffset == -1) | |
663 | return; | |
442ea881 | 664 | supply_register (regcache, regno, ((char *)&greg) + registeroffset); |
ac8c974e AR |
665 | } |
666 | } | |
667 | else | |
668 | TRACE ("ERROR reading registers from inferior.\n"); | |
669 | } | |
670 | ||
671 | /* Store registers for currently selected thread (CURRENT_INFERIOR). | |
672 | We always store all registers, regardless of REGNO. */ | |
673 | ||
674 | static void | |
442ea881 | 675 | nto_store_registers (struct regcache *regcache, int regno) |
ac8c974e AR |
676 | { |
677 | procfs_greg greg; | |
678 | int err; | |
ac8c974e AR |
679 | |
680 | TRACE ("%s (regno:%d)\n", __func__, regno); | |
681 | ||
0bfdf32f | 682 | if (current_thread == NULL) |
ac8c974e | 683 | { |
0bfdf32f | 684 | TRACE ("current_thread is NULL\n"); |
ac8c974e AR |
685 | return; |
686 | } | |
124aceb4 | 687 | ptid_t ptid = ptid_of (current_thread); |
ac8c974e AR |
688 | if (!nto_set_thread (ptid)) |
689 | return; | |
690 | ||
691 | memset (&greg, 0, sizeof (greg)); | |
692 | for (regno = 0; regno != the_low_target.num_regs; ++regno) | |
693 | { | |
694 | const unsigned int regoffset | |
695 | = the_low_target.register_offset (regno); | |
442ea881 | 696 | collect_register (regcache, regno, ((char *)&greg) + regoffset); |
ac8c974e AR |
697 | } |
698 | err = devctl (nto_inferior.ctl_fd, DCMD_PROC_SETGREG, &greg, sizeof (greg), | |
699 | 0); | |
700 | if (err != EOK) | |
701 | TRACE ("Error: setting registers.\n"); | |
702 | } | |
703 | ||
704 | /* Read LEN bytes from inferior's memory address MEMADDR into | |
705 | gdbserver's MYADDR buffer. | |
706 | ||
707 | Return 0 on success -1 otherwise. */ | |
708 | ||
709 | static int | |
710 | nto_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) | |
711 | { | |
712 | TRACE ("%s memaddr:0x%08lx, len:%d\n", __func__, memaddr, len); | |
713 | ||
714 | if (nto_xfer_memory (memaddr, myaddr, len, 0) != len) | |
715 | { | |
716 | TRACE ("Failed to read memory\n"); | |
717 | return -1; | |
718 | } | |
719 | ||
720 | return 0; | |
721 | } | |
722 | ||
723 | /* Write LEN bytes from gdbserver's buffer MYADDR into inferior's | |
724 | memory at address MEMADDR. | |
725 | ||
726 | Return 0 on success -1 otherwise. */ | |
727 | ||
728 | static int | |
729 | nto_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len) | |
730 | { | |
731 | int len_written; | |
732 | ||
733 | TRACE ("%s memaddr: 0x%08llx len: %d\n", __func__, memaddr, len); | |
734 | if ((len_written = nto_xfer_memory (memaddr, (unsigned char *)myaddr, len, | |
735 | 1)) | |
736 | != len) | |
737 | { | |
738 | TRACE ("Wanted to write: %d but written: %d\n", len, len_written); | |
739 | return -1; | |
740 | } | |
741 | ||
742 | return 0; | |
743 | } | |
744 | ||
745 | /* Stop inferior. We always stop all threads. */ | |
746 | ||
747 | static void | |
748 | nto_request_interrupt (void) | |
749 | { | |
750 | TRACE ("%s\n", __func__); | |
fd79271b | 751 | nto_set_thread (ptid_t (nto_inferior.pid, 1, 0)); |
ac8c974e AR |
752 | if (EOK != devctl (nto_inferior.ctl_fd, DCMD_PROC_STOP, NULL, 0, 0)) |
753 | TRACE ("Error stopping inferior.\n"); | |
754 | } | |
755 | ||
756 | /* Read auxiliary vector from inferior's memory into gdbserver's buffer | |
757 | MYADDR. We always read whole auxv. | |
758 | ||
759 | Return number of bytes stored in MYADDR buffer, 0 if OFFSET > 0 | |
760 | or -1 on error. */ | |
761 | ||
762 | static int | |
763 | nto_read_auxv (CORE_ADDR offset, unsigned char *myaddr, unsigned int len) | |
764 | { | |
765 | int err; | |
766 | CORE_ADDR initial_stack; | |
767 | procfs_info procinfo; | |
768 | ||
769 | TRACE ("%s\n", __func__); | |
770 | if (offset > 0) | |
771 | return 0; | |
772 | ||
773 | err = devctl (nto_inferior.ctl_fd, DCMD_PROC_INFO, &procinfo, | |
774 | sizeof procinfo, 0); | |
775 | if (err != EOK) | |
776 | return -1; | |
777 | ||
778 | initial_stack = procinfo.initial_stack; | |
779 | ||
780 | return nto_read_auxv_from_initial_stack (initial_stack, myaddr, len); | |
781 | } | |
782 | ||
802e8e6d PA |
783 | static int |
784 | nto_supports_z_point_type (char z_type) | |
785 | { | |
786 | switch (z_type) | |
787 | { | |
788 | case Z_PACKET_SW_BP: | |
789 | case Z_PACKET_HW_BP: | |
790 | case Z_PACKET_WRITE_WP: | |
791 | case Z_PACKET_READ_WP: | |
792 | case Z_PACKET_ACCESS_WP: | |
793 | return 1; | |
794 | default: | |
795 | return 0; | |
796 | } | |
797 | } | |
798 | ||
799 | /* Insert {break/watch}point at address ADDR. SIZE is not used. */ | |
ac8c974e AR |
800 | |
801 | static int | |
802e8e6d PA |
802 | nto_insert_point (enum raw_bkpt_type type, CORE_ADDR addr, |
803 | int size, struct raw_breakpoint *bp) | |
ac8c974e AR |
804 | { |
805 | int wtype = _DEBUG_BREAK_HW; /* Always request HW. */ | |
806 | ||
774ee6d2 | 807 | TRACE ("%s type:%c addr: 0x%08lx len:%d\n", __func__, (int)type, addr, size); |
ac8c974e AR |
808 | switch (type) |
809 | { | |
802e8e6d | 810 | case raw_bkpt_type_sw: |
ac8c974e AR |
811 | wtype = _DEBUG_BREAK_EXEC; |
812 | break; | |
802e8e6d | 813 | case raw_bkpt_type_hw: |
ac8c974e AR |
814 | wtype |= _DEBUG_BREAK_EXEC; |
815 | break; | |
802e8e6d | 816 | case raw_bkpt_type_write_wp: |
ac8c974e AR |
817 | wtype |= _DEBUG_BREAK_RW; |
818 | break; | |
802e8e6d | 819 | case raw_bkpt_type_read_wp: |
ac8c974e AR |
820 | wtype |= _DEBUG_BREAK_RD; |
821 | break; | |
802e8e6d | 822 | case raw_bkpt_type_access_wp: |
ac8c974e AR |
823 | wtype |= _DEBUG_BREAK_RW; |
824 | break; | |
825 | default: | |
826 | return 1; /* Not supported. */ | |
827 | } | |
828 | return nto_breakpoint (addr, wtype, 0); | |
829 | } | |
830 | ||
802e8e6d | 831 | /* Remove {break/watch}point at address ADDR. SIZE is not used. */ |
ac8c974e AR |
832 | |
833 | static int | |
802e8e6d PA |
834 | nto_remove_point (enum raw_bkpt_type type, CORE_ADDR addr, |
835 | int size, struct raw_breakpoint *bp) | |
ac8c974e AR |
836 | { |
837 | int wtype = _DEBUG_BREAK_HW; /* Always request HW. */ | |
838 | ||
774ee6d2 | 839 | TRACE ("%s type:%c addr: 0x%08lx len:%d\n", __func__, (int)type, addr, size); |
ac8c974e AR |
840 | switch (type) |
841 | { | |
802e8e6d | 842 | case raw_bkpt_type_sw: |
ac8c974e AR |
843 | wtype = _DEBUG_BREAK_EXEC; |
844 | break; | |
802e8e6d | 845 | case raw_bkpt_type_hw: |
ac8c974e AR |
846 | wtype |= _DEBUG_BREAK_EXEC; |
847 | break; | |
802e8e6d | 848 | case raw_bkpt_type_write_wp: |
ac8c974e AR |
849 | wtype |= _DEBUG_BREAK_RW; |
850 | break; | |
802e8e6d | 851 | case raw_bkpt_type_read_wp: |
ac8c974e AR |
852 | wtype |= _DEBUG_BREAK_RD; |
853 | break; | |
802e8e6d | 854 | case raw_bkpt_type_access_wp: |
ac8c974e AR |
855 | wtype |= _DEBUG_BREAK_RW; |
856 | break; | |
857 | default: | |
858 | return 1; /* Not supported. */ | |
859 | } | |
860 | return nto_breakpoint (addr, wtype, -1); | |
861 | } | |
862 | ||
863 | /* Check if the reason of stop for current thread (CURRENT_INFERIOR) is | |
864 | a watchpoint. | |
865 | ||
866 | Return 1 if stopped by watchpoint, 0 otherwise. */ | |
867 | ||
868 | static int | |
869 | nto_stopped_by_watchpoint (void) | |
870 | { | |
871 | int ret = 0; | |
872 | ||
873 | TRACE ("%s\n", __func__); | |
0bfdf32f | 874 | if (nto_inferior.ctl_fd != -1 && current_thread != NULL) |
ac8c974e | 875 | { |
124aceb4 | 876 | ptid_t ptid = ptid_of (current_thread); |
ac8c974e AR |
877 | if (nto_set_thread (ptid)) |
878 | { | |
879 | const int watchmask = _DEBUG_FLAG_TRACE_RD | _DEBUG_FLAG_TRACE_WR | |
880 | | _DEBUG_FLAG_TRACE_MODIFY; | |
881 | procfs_status status; | |
882 | int err; | |
883 | ||
884 | err = devctl (nto_inferior.ctl_fd, DCMD_PROC_STATUS, &status, | |
885 | sizeof (status), 0); | |
886 | if (err == EOK && (status.flags & watchmask)) | |
887 | ret = 1; | |
888 | } | |
889 | } | |
890 | TRACE ("%s: %s\n", __func__, ret ? "yes" : "no"); | |
891 | return ret; | |
892 | } | |
893 | ||
894 | /* Get instruction pointer for CURRENT_INFERIOR thread. | |
895 | ||
896 | Return inferior's instruction pointer value, or 0 on error. */ | |
897 | ||
898 | static CORE_ADDR | |
899 | nto_stopped_data_address (void) | |
900 | { | |
901 | CORE_ADDR ret = (CORE_ADDR)0; | |
902 | ||
903 | TRACE ("%s\n", __func__); | |
0bfdf32f | 904 | if (nto_inferior.ctl_fd != -1 && current_thread != NULL) |
ac8c974e | 905 | { |
124aceb4 | 906 | ptid_t ptid = ptid_of (current_thread); |
ac8c974e AR |
907 | |
908 | if (nto_set_thread (ptid)) | |
909 | { | |
910 | procfs_status status; | |
911 | ||
912 | if (devctl (nto_inferior.ctl_fd, DCMD_PROC_STATUS, &status, | |
913 | sizeof (status), 0) == EOK) | |
914 | ret = status.ip; | |
915 | } | |
916 | } | |
917 | TRACE ("%s: 0x%08lx\n", __func__, ret); | |
918 | return ret; | |
919 | } | |
920 | ||
921 | /* We do not currently support non-stop. */ | |
922 | ||
923 | static int | |
924 | nto_supports_non_stop (void) | |
925 | { | |
926 | TRACE ("%s\n", __func__); | |
927 | return 0; | |
928 | } | |
929 | ||
fb78e89c AT |
930 | /* Implementation of the target_ops method "sw_breakpoint_from_kind". */ |
931 | ||
932 | static const gdb_byte * | |
933 | nto_sw_breakpoint_from_kind (int kind, int *size) | |
934 | { | |
935 | *size = the_low_target.breakpoint_len; | |
936 | return the_low_target.breakpoint; | |
937 | } | |
ac8c974e | 938 | |
5ef9273d TBA |
939 | /* The QNX Neutrino target ops object. */ |
940 | ||
941 | static nto_process_target the_nto_target; | |
ac8c974e | 942 | |
5b6d1e4f | 943 | static process_stratum_target nto_target_ops = { |
ac8c974e AR |
944 | nto_resume, |
945 | nto_wait, | |
946 | nto_fetch_registers, | |
947 | nto_store_registers, | |
90d74c30 | 948 | NULL, /* prepare_to_access_memory */ |
0146f85b | 949 | NULL, /* done_accessing_memory */ |
ac8c974e AR |
950 | nto_read_memory, |
951 | nto_write_memory, | |
952 | NULL, /* nto_look_up_symbols */ | |
953 | nto_request_interrupt, | |
954 | nto_read_auxv, | |
802e8e6d | 955 | nto_supports_z_point_type, |
ac8c974e AR |
956 | nto_insert_point, |
957 | nto_remove_point, | |
f5771b1d PA |
958 | NULL, /* stopped_by_sw_breakpoint */ |
959 | NULL, /* supports_stopped_by_sw_breakpoint */ | |
960 | NULL, /* stopped_by_hw_breakpoint */ | |
961 | NULL, /* supports_stopped_by_hw_breakpoint */ | |
70b90b91 | 962 | target_can_do_hardware_single_step, |
ac8c974e AR |
963 | nto_stopped_by_watchpoint, |
964 | nto_stopped_data_address, | |
965 | NULL, /* nto_read_offsets */ | |
966 | NULL, /* thread_db_set_tls_address */ | |
ac8c974e AR |
967 | hostio_last_error_from_errno, |
968 | NULL, /* nto_qxfer_osdata */ | |
969 | NULL, /* xfer_siginfo */ | |
970 | nto_supports_non_stop, | |
971 | NULL, /* async */ | |
fb78e89c AT |
972 | NULL, /* start_non_stop */ |
973 | NULL, /* supports_multi_process */ | |
974 | NULL, /* supports_fork_events */ | |
975 | NULL, /* supports_vfork_events */ | |
976 | NULL, /* supports_exec_events */ | |
977 | NULL, /* handle_new_gdb_connection */ | |
978 | NULL, /* handle_monitor_command */ | |
979 | NULL, /* core_of_thread */ | |
980 | NULL, /* read_loadmap */ | |
981 | NULL, /* process_qsupported */ | |
982 | NULL, /* supports_tracepoints */ | |
983 | NULL, /* read_pc */ | |
984 | NULL, /* write_pc */ | |
985 | NULL, /* thread_stopped */ | |
986 | NULL, /* get_tib_address */ | |
987 | NULL, /* pause_all */ | |
988 | NULL, /* unpause_all */ | |
989 | NULL, /* stabilize_threads */ | |
990 | NULL, /* install_fast_tracepoint_jump_pad */ | |
991 | NULL, /* emit_ops */ | |
992 | NULL, /* supports_disable_randomization */ | |
993 | NULL, /* get_min_fast_tracepoint_insn_len */ | |
994 | NULL, /* qxfer_libraries_svr4 */ | |
995 | NULL, /* support_agent */ | |
fb78e89c AT |
996 | NULL, /* enable_btrace */ |
997 | NULL, /* disable_btrace */ | |
998 | NULL, /* read_btrace */ | |
999 | NULL, /* read_btrace_conf */ | |
1000 | NULL, /* supports_range_stepping */ | |
1001 | NULL, /* pid_to_exec_file */ | |
1002 | NULL, /* multifs_open */ | |
1003 | NULL, /* multifs_unlink */ | |
1004 | NULL, /* multifs_readlink */ | |
1005 | NULL, /* breakpoint_kind_from_pc */ | |
1006 | nto_sw_breakpoint_from_kind, | |
5ef9273d TBA |
1007 | NULL, /* thread_name */ |
1008 | NULL, /* breakpoint_kind_from_current_state */ | |
1009 | NULL, /* supports_software_single_step */ | |
1010 | NULL, /* supports_catch_syscall */ | |
1011 | NULL, /* get_ipa_tdesc_idx */ | |
1012 | NULL, /* thread_handle */ | |
1013 | &the_nto_target, | |
ac8c974e AR |
1014 | }; |
1015 | ||
1016 | ||
1017 | /* Global function called by server.c. Initializes QNX Neutrino | |
1018 | gdbserver. */ | |
1019 | ||
1020 | void | |
1021 | initialize_low (void) | |
1022 | { | |
1023 | sigset_t set; | |
1024 | ||
1025 | TRACE ("%s\n", __func__); | |
1026 | set_target_ops (&nto_target_ops); | |
ac8c974e AR |
1027 | |
1028 | /* We use SIGUSR1 to gain control after we block waiting for a process. | |
1029 | We use sigwaitevent to wait. */ | |
1030 | sigemptyset (&set); | |
1031 | sigaddset (&set, SIGUSR1); | |
1032 | sigprocmask (SIG_BLOCK, &set, NULL); | |
1033 | } | |
1034 |