Commit | Line | Data |
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42a4f53d | 1 | /* Copyright (C) 2009-2019 Free Software Foundation, Inc. |
8ed54b31 JB |
2 | |
3 | This file is part of GDB. | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #include "server.h" | |
19 | #include "target.h" | |
20 | #include "lynx-low.h" | |
21 | ||
22 | #include <limits.h> | |
1adfc54d | 23 | #include <sys/ptrace.h> |
8ed54b31 JB |
24 | #include <sys/piddef.h> /* Provides PIDGET, TIDGET, BUILDPID, etc. */ |
25 | #include <unistd.h> | |
26 | #include <sys/ioctl.h> | |
27 | #include <sys/types.h> | |
0747795c | 28 | #include "common/gdb_wait.h" |
8ed54b31 | 29 | #include <signal.h> |
0747795c TT |
30 | #include "common/filestuff.h" |
31 | #include "common/common-inferior.h" | |
2090129c | 32 | #include "nat/fork-inferior.h" |
8ed54b31 JB |
33 | |
34 | int using_threads = 1; | |
35 | ||
3aee8918 PA |
36 | const struct target_desc *lynx_tdesc; |
37 | ||
d631c5a7 JB |
38 | /* Per-process private data. */ |
39 | ||
40 | struct process_info_private | |
41 | { | |
42 | /* The PTID obtained from the last wait performed on this process. | |
43 | Initialized to null_ptid until the first wait is performed. */ | |
44 | ptid_t last_wait_event_ptid; | |
45 | }; | |
46 | ||
8ed54b31 JB |
47 | /* Print a debug trace on standard output if debug_threads is set. */ |
48 | ||
49 | static void | |
50 | lynx_debug (char *string, ...) | |
51 | { | |
52 | va_list args; | |
53 | ||
54 | if (!debug_threads) | |
55 | return; | |
56 | ||
57 | va_start (args, string); | |
58 | fprintf (stderr, "DEBUG(lynx): "); | |
59 | vfprintf (stderr, string, args); | |
60 | fprintf (stderr, "\n"); | |
61 | va_end (args); | |
62 | } | |
63 | ||
64 | /* Build a ptid_t given a PID and a LynxOS TID. */ | |
65 | ||
66 | static ptid_t | |
fd79271b | 67 | lynx_ptid_t (int pid, long tid) |
8ed54b31 JB |
68 | { |
69 | /* brobecker/2010-06-21: It looks like the LWP field in ptids | |
70 | should be distinct for each thread (see write_ptid where it | |
71 | writes the thread ID from the LWP). So instead of storing | |
72 | the LynxOS tid in the tid field of the ptid, we store it in | |
73 | the lwp field. */ | |
fd79271b | 74 | return ptid_t (pid, tid, 0); |
8ed54b31 JB |
75 | } |
76 | ||
77 | /* Return the process ID of the given PTID. | |
78 | ||
79 | This function has little reason to exist, it's just a wrapper around | |
80 | ptid_get_pid. But since we have a getter function for the lynxos | |
81 | ptid, it feels cleaner to have a getter for the pid as well. */ | |
82 | ||
83 | static int | |
84 | lynx_ptid_get_pid (ptid_t ptid) | |
85 | { | |
e99b03dc | 86 | return ptid.pid (); |
8ed54b31 JB |
87 | } |
88 | ||
89 | /* Return the LynxOS tid of the given PTID. */ | |
90 | ||
91 | static long | |
92 | lynx_ptid_get_tid (ptid_t ptid) | |
93 | { | |
fd79271b | 94 | /* See lynx_ptid_t: The LynxOS tid is stored inside the lwp field |
8ed54b31 | 95 | of the ptid. */ |
e38504b3 | 96 | return ptid.lwp (); |
8ed54b31 JB |
97 | } |
98 | ||
99 | /* For a given PTID, return the associated PID as known by the LynxOS | |
100 | ptrace layer. */ | |
101 | ||
102 | static int | |
103 | lynx_ptrace_pid_from_ptid (ptid_t ptid) | |
104 | { | |
105 | return BUILDPID (lynx_ptid_get_pid (ptid), lynx_ptid_get_tid (ptid)); | |
106 | } | |
107 | ||
108 | /* Return a string image of the ptrace REQUEST number. */ | |
109 | ||
110 | static char * | |
111 | ptrace_request_to_str (int request) | |
112 | { | |
4039cf45 | 113 | #define CASE(X) case X: return #X |
8ed54b31 JB |
114 | switch (request) |
115 | { | |
4039cf45 JB |
116 | CASE(PTRACE_TRACEME); |
117 | CASE(PTRACE_PEEKTEXT); | |
118 | CASE(PTRACE_PEEKDATA); | |
119 | CASE(PTRACE_PEEKUSER); | |
120 | CASE(PTRACE_POKETEXT); | |
121 | CASE(PTRACE_POKEDATA); | |
122 | CASE(PTRACE_POKEUSER); | |
123 | CASE(PTRACE_CONT); | |
124 | CASE(PTRACE_KILL); | |
125 | CASE(PTRACE_SINGLESTEP); | |
126 | CASE(PTRACE_ATTACH); | |
127 | CASE(PTRACE_DETACH); | |
128 | CASE(PTRACE_GETREGS); | |
129 | CASE(PTRACE_SETREGS); | |
130 | CASE(PTRACE_GETFPREGS); | |
131 | CASE(PTRACE_SETFPREGS); | |
132 | CASE(PTRACE_READDATA); | |
133 | CASE(PTRACE_WRITEDATA); | |
134 | CASE(PTRACE_READTEXT); | |
135 | CASE(PTRACE_WRITETEXT); | |
136 | CASE(PTRACE_GETFPAREGS); | |
137 | CASE(PTRACE_SETFPAREGS); | |
138 | CASE(PTRACE_GETWINDOW); | |
139 | CASE(PTRACE_SETWINDOW); | |
140 | CASE(PTRACE_SYSCALL); | |
141 | CASE(PTRACE_DUMPCORE); | |
142 | CASE(PTRACE_SETWRBKPT); | |
143 | CASE(PTRACE_SETACBKPT); | |
144 | CASE(PTRACE_CLRBKPT); | |
145 | CASE(PTRACE_GET_UCODE); | |
8ed54b31 | 146 | #ifdef PT_READ_GPR |
4039cf45 | 147 | CASE(PT_READ_GPR); |
8ed54b31 JB |
148 | #endif |
149 | #ifdef PT_WRITE_GPR | |
4039cf45 | 150 | CASE(PT_WRITE_GPR); |
8ed54b31 JB |
151 | #endif |
152 | #ifdef PT_READ_FPR | |
4039cf45 | 153 | CASE(PT_READ_FPR); |
8ed54b31 JB |
154 | #endif |
155 | #ifdef PT_WRITE_FPR | |
4039cf45 | 156 | CASE(PT_WRITE_FPR); |
8ed54b31 | 157 | #endif |
8ed54b31 | 158 | #ifdef PT_READ_VPR |
4039cf45 | 159 | CASE(PT_READ_VPR); |
8ed54b31 JB |
160 | #endif |
161 | #ifdef PT_WRITE_VPR | |
4039cf45 | 162 | CASE(PT_WRITE_VPR); |
8ed54b31 JB |
163 | #endif |
164 | #ifdef PTRACE_PEEKUSP | |
4039cf45 | 165 | CASE(PTRACE_PEEKUSP); |
8ed54b31 JB |
166 | #endif |
167 | #ifdef PTRACE_POKEUSP | |
4039cf45 | 168 | CASE(PTRACE_POKEUSP); |
8ed54b31 | 169 | #endif |
4039cf45 JB |
170 | CASE(PTRACE_PEEKTHREAD); |
171 | CASE(PTRACE_THREADUSER); | |
172 | CASE(PTRACE_FPREAD); | |
173 | CASE(PTRACE_FPWRITE); | |
174 | CASE(PTRACE_SETSIG); | |
175 | CASE(PTRACE_CONT_ONE); | |
176 | CASE(PTRACE_KILL_ONE); | |
177 | CASE(PTRACE_SINGLESTEP_ONE); | |
178 | CASE(PTRACE_GETLOADINFO); | |
179 | CASE(PTRACE_GETTRACESIG); | |
78cbc024 | 180 | #ifdef PTRACE_GETTHREADLIST |
4039cf45 | 181 | CASE(PTRACE_GETTHREADLIST); |
78cbc024 | 182 | #endif |
8ed54b31 | 183 | } |
4039cf45 JB |
184 | #undef CASE |
185 | ||
8ed54b31 JB |
186 | return "<unknown-request>"; |
187 | } | |
188 | ||
189 | /* A wrapper around ptrace that allows us to print debug traces of | |
190 | ptrace calls if debug traces are activated. */ | |
191 | ||
192 | static int | |
193 | lynx_ptrace (int request, ptid_t ptid, int addr, int data, int addr2) | |
194 | { | |
195 | int result; | |
196 | const int pid = lynx_ptrace_pid_from_ptid (ptid); | |
197 | int saved_errno; | |
198 | ||
199 | if (debug_threads) | |
200 | fprintf (stderr, "PTRACE (%s, pid=%d(pid=%d, tid=%d), addr=0x%x, " | |
201 | "data=0x%x, addr2=0x%x)", | |
202 | ptrace_request_to_str (request), pid, PIDGET (pid), TIDGET (pid), | |
203 | addr, data, addr2); | |
204 | result = ptrace (request, pid, addr, data, addr2); | |
205 | saved_errno = errno; | |
206 | if (debug_threads) | |
207 | fprintf (stderr, " -> %d (=0x%x)\n", result, result); | |
208 | ||
209 | errno = saved_errno; | |
210 | return result; | |
211 | } | |
212 | ||
d631c5a7 JB |
213 | /* Call add_process with the given parameters, and initializes |
214 | the process' private data. */ | |
215 | ||
216 | static struct process_info * | |
217 | lynx_add_process (int pid, int attached) | |
218 | { | |
219 | struct process_info *proc; | |
220 | ||
221 | proc = add_process (pid, attached); | |
3aee8918 | 222 | proc->tdesc = lynx_tdesc; |
8d749320 | 223 | proc->priv = XCNEW (struct process_info_private); |
fe978cb0 | 224 | proc->priv->last_wait_event_ptid = null_ptid; |
d631c5a7 JB |
225 | |
226 | return proc; | |
227 | } | |
228 | ||
2090129c SDJ |
229 | /* Callback used by fork_inferior to start tracing the inferior. */ |
230 | ||
231 | static void | |
232 | lynx_ptrace_fun () | |
233 | { | |
234 | int pgrp; | |
235 | ||
236 | /* Switch child to its own process group so that signals won't | |
237 | directly affect GDBserver. */ | |
238 | pgrp = getpid(); | |
239 | if (pgrp < 0) | |
240 | trace_start_error_with_name ("pgrp"); | |
241 | if (setpgid (0, pgrp) < 0) | |
242 | trace_start_error_with_name ("setpgid"); | |
243 | if (ioctl (0, TIOCSPGRP, &pgrp) < 0) | |
244 | trace_start_error_with_name ("ioctl"); | |
245 | if (lynx_ptrace (PTRACE_TRACEME, null_ptid, 0, 0, 0) < 0) | |
246 | trace_start_error_with_name ("lynx_ptrace"); | |
247 | } | |
248 | ||
8ed54b31 JB |
249 | /* Implement the create_inferior method of the target_ops vector. */ |
250 | ||
251 | static int | |
2090129c SDJ |
252 | lynx_create_inferior (const char *program, |
253 | const std::vector<char *> &program_args) | |
8ed54b31 | 254 | { |
8ed54b31 | 255 | int pid; |
2090129c | 256 | std::string str_program_args = stringify_argv (program_args); |
8ed54b31 JB |
257 | |
258 | lynx_debug ("lynx_create_inferior ()"); | |
259 | ||
2090129c SDJ |
260 | pid = fork_inferior (program, |
261 | str_program_args.c_str (), | |
9a6c7d9c | 262 | get_environ ()->envp (), lynx_ptrace_fun, |
2090129c | 263 | NULL, NULL, NULL, NULL); |
8ed54b31 | 264 | |
2090129c | 265 | post_fork_inferior (pid, program); |
8ed54b31 | 266 | |
d631c5a7 | 267 | lynx_add_process (pid, 0); |
8ed54b31 JB |
268 | /* Do not add the process thread just yet, as we do not know its tid. |
269 | We will add it later, during the wait for the STOP event corresponding | |
270 | to the lynx_ptrace (PTRACE_TRACEME) call above. */ | |
271 | return pid; | |
272 | } | |
273 | ||
97ad4581 JB |
274 | /* Assuming we've just attached to a running inferior whose pid is PID, |
275 | add all threads running in that process. */ | |
276 | ||
277 | static void | |
278 | lynx_add_threads_after_attach (int pid) | |
279 | { | |
280 | /* Ugh! There appears to be no way to get the list of threads | |
281 | in the program we just attached to. So get the list by calling | |
282 | the "ps" command. This is only needed now, as we will then | |
283 | keep the thread list up to date thanks to thread creation and | |
284 | exit notifications. */ | |
285 | FILE *f; | |
286 | char buf[256]; | |
287 | int thread_pid, thread_tid; | |
288 | ||
289 | f = popen ("ps atx", "r"); | |
290 | if (f == NULL) | |
291 | perror_with_name ("Cannot get thread list"); | |
292 | ||
293 | while (fgets (buf, sizeof (buf), f) != NULL) | |
294 | if ((sscanf (buf, "%d %d", &thread_pid, &thread_tid) == 2 | |
295 | && thread_pid == pid)) | |
296 | { | |
fd79271b | 297 | ptid_t thread_ptid = lynx_ptid_t (pid, thread_tid); |
97ad4581 JB |
298 | |
299 | if (!find_thread_ptid (thread_ptid)) | |
300 | { | |
301 | lynx_debug ("New thread: (pid = %d, tid = %d)", | |
302 | pid, thread_tid); | |
303 | add_thread (thread_ptid, NULL); | |
304 | } | |
305 | } | |
306 | ||
307 | pclose (f); | |
308 | } | |
309 | ||
8ed54b31 JB |
310 | /* Implement the attach target_ops method. */ |
311 | ||
312 | static int | |
313 | lynx_attach (unsigned long pid) | |
314 | { | |
fd79271b | 315 | ptid_t ptid = lynx_ptid_t (pid, 0); |
8ed54b31 JB |
316 | |
317 | if (lynx_ptrace (PTRACE_ATTACH, ptid, 0, 0, 0) != 0) | |
318 | error ("Cannot attach to process %lu: %s (%d)\n", pid, | |
319 | strerror (errno), errno); | |
320 | ||
d631c5a7 | 321 | lynx_add_process (pid, 1); |
97ad4581 | 322 | lynx_add_threads_after_attach (pid); |
8ed54b31 JB |
323 | |
324 | return 0; | |
325 | } | |
326 | ||
327 | /* Implement the resume target_ops method. */ | |
328 | ||
329 | static void | |
330 | lynx_resume (struct thread_resume *resume_info, size_t n) | |
331 | { | |
3f6e77ef | 332 | ptid_t ptid = resume_info[0].thread; |
5227d625 JB |
333 | const int request |
334 | = (resume_info[0].kind == resume_step | |
335 | ? (n == 1 ? PTRACE_SINGLESTEP_ONE : PTRACE_SINGLESTEP) | |
336 | : PTRACE_CONT); | |
8ed54b31 | 337 | const int signal = resume_info[0].sig; |
8ed54b31 | 338 | |
58794e1a | 339 | /* If given a minus_one_ptid, then try using the current_process' |
d631c5a7 JB |
340 | private->last_wait_event_ptid. On most LynxOS versions, |
341 | using any of the process' thread works well enough, but | |
342 | LynxOS 178 is a little more sensitive, and triggers some | |
343 | unexpected signals (Eg SIG61) when we resume the inferior | |
344 | using a different thread. */ | |
d7e15655 | 345 | if (ptid == minus_one_ptid) |
fe978cb0 | 346 | ptid = current_process()->priv->last_wait_event_ptid; |
d631c5a7 | 347 | |
58794e1a JB |
348 | /* The ptid might still be minus_one_ptid; this can happen between |
349 | the moment we create the inferior or attach to a process, and | |
350 | the moment we resume its execution for the first time. It is | |
0bfdf32f | 351 | fine to use the current_thread's ptid in those cases. */ |
d7e15655 | 352 | if (ptid == minus_one_ptid) |
124aceb4 | 353 | ptid = ptid_of (current_thread); |
3f6e77ef | 354 | |
e99b03dc | 355 | regcache_invalidate_pid (ptid.pid ()); |
9044dee2 JB |
356 | |
357 | errno = 0; | |
3f6e77ef | 358 | lynx_ptrace (request, ptid, 1, signal, 0); |
9044dee2 JB |
359 | if (errno) |
360 | perror_with_name ("ptrace"); | |
8ed54b31 JB |
361 | } |
362 | ||
363 | /* Resume the execution of the given PTID. */ | |
364 | ||
365 | static void | |
366 | lynx_continue (ptid_t ptid) | |
367 | { | |
368 | struct thread_resume resume_info; | |
369 | ||
370 | resume_info.thread = ptid; | |
371 | resume_info.kind = resume_continue; | |
372 | resume_info.sig = 0; | |
373 | ||
374 | lynx_resume (&resume_info, 1); | |
375 | } | |
376 | ||
8ed54b31 JB |
377 | /* A wrapper around waitpid that handles the various idiosyncrasies |
378 | of LynxOS' waitpid. */ | |
379 | ||
380 | static int | |
381 | lynx_waitpid (int pid, int *stat_loc) | |
382 | { | |
383 | int ret = 0; | |
384 | ||
385 | while (1) | |
386 | { | |
387 | ret = waitpid (pid, stat_loc, WNOHANG); | |
388 | if (ret < 0) | |
389 | { | |
390 | /* An ECHILD error is not indicative of a real problem. | |
391 | It happens for instance while waiting for the inferior | |
392 | to stop after attaching to it. */ | |
393 | if (errno != ECHILD) | |
394 | perror_with_name ("waitpid (WNOHANG)"); | |
395 | } | |
396 | if (ret > 0) | |
397 | break; | |
398 | /* No event with WNOHANG. See if there is one with WUNTRACED. */ | |
399 | ret = waitpid (pid, stat_loc, WNOHANG | WUNTRACED); | |
400 | if (ret < 0) | |
401 | { | |
402 | /* An ECHILD error is not indicative of a real problem. | |
403 | It happens for instance while waiting for the inferior | |
404 | to stop after attaching to it. */ | |
405 | if (errno != ECHILD) | |
406 | perror_with_name ("waitpid (WNOHANG|WUNTRACED)"); | |
407 | } | |
408 | if (ret > 0) | |
409 | break; | |
410 | usleep (1000); | |
411 | } | |
412 | return ret; | |
413 | } | |
414 | ||
415 | /* Implement the wait target_ops method. */ | |
416 | ||
417 | static ptid_t | |
418 | lynx_wait_1 (ptid_t ptid, struct target_waitstatus *status, int options) | |
419 | { | |
420 | int pid; | |
421 | int ret; | |
422 | int wstat; | |
423 | ptid_t new_ptid; | |
424 | ||
d7e15655 | 425 | if (ptid == minus_one_ptid) |
124aceb4 | 426 | pid = lynx_ptid_get_pid (ptid_of (current_thread)); |
8ed54b31 JB |
427 | else |
428 | pid = BUILDPID (lynx_ptid_get_pid (ptid), lynx_ptid_get_tid (ptid)); | |
429 | ||
430 | retry: | |
431 | ||
432 | ret = lynx_waitpid (pid, &wstat); | |
fd79271b | 433 | new_ptid = lynx_ptid_t (ret, ((union wait *) &wstat)->w_tid); |
fe978cb0 | 434 | find_process_pid (ret)->priv->last_wait_event_ptid = new_ptid; |
8ed54b31 JB |
435 | |
436 | /* If this is a new thread, then add it now. The reason why we do | |
437 | this here instead of when handling new-thread events is because | |
438 | we need to add the thread associated to the "main" thread - even | |
439 | for non-threaded applications where the new-thread events are not | |
440 | generated. */ | |
441 | if (!find_thread_ptid (new_ptid)) | |
8b93d60f JB |
442 | { |
443 | lynx_debug ("New thread: (pid = %d, tid = %d)", | |
444 | lynx_ptid_get_pid (new_ptid), lynx_ptid_get_tid (new_ptid)); | |
445 | add_thread (new_ptid, NULL); | |
446 | } | |
8ed54b31 JB |
447 | |
448 | if (WIFSTOPPED (wstat)) | |
449 | { | |
450 | status->kind = TARGET_WAITKIND_STOPPED; | |
2ea28649 | 451 | status->value.integer = gdb_signal_from_host (WSTOPSIG (wstat)); |
8ed54b31 JB |
452 | lynx_debug ("process stopped with signal: %d", |
453 | status->value.integer); | |
454 | } | |
455 | else if (WIFEXITED (wstat)) | |
456 | { | |
457 | status->kind = TARGET_WAITKIND_EXITED; | |
458 | status->value.integer = WEXITSTATUS (wstat); | |
459 | lynx_debug ("process exited with code: %d", status->value.integer); | |
460 | } | |
461 | else if (WIFSIGNALED (wstat)) | |
462 | { | |
463 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
2ea28649 | 464 | status->value.integer = gdb_signal_from_host (WTERMSIG (wstat)); |
8ed54b31 JB |
465 | lynx_debug ("process terminated with code: %d", |
466 | status->value.integer); | |
467 | } | |
468 | else | |
469 | { | |
470 | /* Not sure what happened if we get here, or whether we can | |
471 | in fact get here. But if we do, handle the event the best | |
472 | we can. */ | |
473 | status->kind = TARGET_WAITKIND_STOPPED; | |
2ea28649 | 474 | status->value.integer = gdb_signal_from_host (0); |
8ed54b31 JB |
475 | lynx_debug ("unknown event ????"); |
476 | } | |
477 | ||
478 | /* SIGTRAP events are generated for situations other than single-step/ | |
479 | breakpoint events (Eg. new-thread events). Handle those other types | |
480 | of events, and resume the execution if necessary. */ | |
481 | if (status->kind == TARGET_WAITKIND_STOPPED | |
a493e3e2 | 482 | && status->value.integer == GDB_SIGNAL_TRAP) |
8ed54b31 JB |
483 | { |
484 | const int realsig = lynx_ptrace (PTRACE_GETTRACESIG, new_ptid, 0, 0, 0); | |
485 | ||
486 | lynx_debug ("(realsig = %d)", realsig); | |
487 | switch (realsig) | |
488 | { | |
489 | case SIGNEWTHREAD: | |
490 | /* We just added the new thread above. No need to do anything | |
491 | further. Just resume the execution again. */ | |
3f6e77ef | 492 | lynx_continue (new_ptid); |
8ed54b31 JB |
493 | goto retry; |
494 | ||
495 | case SIGTHREADEXIT: | |
496 | remove_thread (find_thread_ptid (new_ptid)); | |
3f6e77ef | 497 | lynx_continue (new_ptid); |
8ed54b31 JB |
498 | goto retry; |
499 | } | |
500 | } | |
501 | ||
502 | return new_ptid; | |
503 | } | |
504 | ||
505 | /* A wrapper around lynx_wait_1 that also prints debug traces when | |
506 | such debug traces have been activated. */ | |
507 | ||
508 | static ptid_t | |
509 | lynx_wait (ptid_t ptid, struct target_waitstatus *status, int options) | |
510 | { | |
511 | ptid_t new_ptid; | |
512 | ||
513 | lynx_debug ("lynx_wait (pid = %d, tid = %ld)", | |
514 | lynx_ptid_get_pid (ptid), lynx_ptid_get_tid (ptid)); | |
515 | new_ptid = lynx_wait_1 (ptid, status, options); | |
516 | lynx_debug (" -> (pid=%d, tid=%ld, status->kind = %d)", | |
517 | lynx_ptid_get_pid (new_ptid), lynx_ptid_get_tid (new_ptid), | |
518 | status->kind); | |
519 | return new_ptid; | |
520 | } | |
521 | ||
522 | /* Implement the kill target_ops method. */ | |
523 | ||
524 | static int | |
a780ef4f | 525 | lynx_kill (process_info *process) |
8ed54b31 | 526 | { |
a780ef4f | 527 | ptid_t ptid = lynx_ptid_t (process->pid, 0); |
8ed54b31 | 528 | struct target_waitstatus status; |
8ed54b31 JB |
529 | |
530 | lynx_ptrace (PTRACE_KILL, ptid, 0, 0, 0); | |
531 | lynx_wait (ptid, &status, 0); | |
532 | the_target->mourn (process); | |
533 | return 0; | |
534 | } | |
535 | ||
536 | /* Implement the detach target_ops method. */ | |
537 | ||
538 | static int | |
ef2ddb33 | 539 | lynx_detach (process_info *process) |
8ed54b31 | 540 | { |
ef2ddb33 | 541 | ptid_t ptid = lynx_ptid_t (process->pid, 0); |
8ed54b31 JB |
542 | |
543 | lynx_ptrace (PTRACE_DETACH, ptid, 0, 0, 0); | |
544 | the_target->mourn (process); | |
545 | return 0; | |
546 | } | |
547 | ||
548 | /* Implement the mourn target_ops method. */ | |
549 | ||
550 | static void | |
551 | lynx_mourn (struct process_info *proc) | |
552 | { | |
c91bb56b | 553 | for_each_thread (proc->pid, remove_thread); |
4abd5ed2 | 554 | |
d631c5a7 | 555 | /* Free our private data. */ |
fe978cb0 PA |
556 | free (proc->priv); |
557 | proc->priv = NULL; | |
d631c5a7 | 558 | |
4abd5ed2 | 559 | remove_process (proc); |
8ed54b31 JB |
560 | } |
561 | ||
562 | /* Implement the join target_ops method. */ | |
563 | ||
564 | static void | |
d105de22 | 565 | lynx_join (int pid) |
8ed54b31 JB |
566 | { |
567 | /* The PTRACE_DETACH is sufficient to detach from the process. | |
568 | So no need to do anything extra. */ | |
569 | } | |
570 | ||
571 | /* Implement the thread_alive target_ops method. */ | |
572 | ||
573 | static int | |
574 | lynx_thread_alive (ptid_t ptid) | |
575 | { | |
576 | /* The list of threads is updated at the end of each wait, so it | |
577 | should be up to date. No need to re-fetch it. */ | |
578 | return (find_thread_ptid (ptid) != NULL); | |
579 | } | |
580 | ||
581 | /* Implement the fetch_registers target_ops method. */ | |
582 | ||
583 | static void | |
584 | lynx_fetch_registers (struct regcache *regcache, int regno) | |
585 | { | |
586 | struct lynx_regset_info *regset = lynx_target_regsets; | |
124aceb4 | 587 | ptid_t inferior_ptid = ptid_of (current_thread); |
8ed54b31 JB |
588 | |
589 | lynx_debug ("lynx_fetch_registers (regno = %d)", regno); | |
590 | ||
591 | while (regset->size >= 0) | |
592 | { | |
593 | char *buf; | |
594 | int res; | |
595 | ||
596 | buf = xmalloc (regset->size); | |
597 | res = lynx_ptrace (regset->get_request, inferior_ptid, (int) buf, 0, 0); | |
598 | if (res < 0) | |
599 | perror ("ptrace"); | |
600 | regset->store_function (regcache, buf); | |
601 | free (buf); | |
602 | regset++; | |
603 | } | |
604 | } | |
605 | ||
606 | /* Implement the store_registers target_ops method. */ | |
607 | ||
608 | static void | |
609 | lynx_store_registers (struct regcache *regcache, int regno) | |
610 | { | |
611 | struct lynx_regset_info *regset = lynx_target_regsets; | |
124aceb4 | 612 | ptid_t inferior_ptid = ptid_of (current_thread); |
8ed54b31 JB |
613 | |
614 | lynx_debug ("lynx_store_registers (regno = %d)", regno); | |
615 | ||
616 | while (regset->size >= 0) | |
617 | { | |
618 | char *buf; | |
619 | int res; | |
620 | ||
621 | buf = xmalloc (regset->size); | |
622 | res = lynx_ptrace (regset->get_request, inferior_ptid, (int) buf, 0, 0); | |
623 | if (res == 0) | |
624 | { | |
625 | /* Then overlay our cached registers on that. */ | |
626 | regset->fill_function (regcache, buf); | |
627 | /* Only now do we write the register set. */ | |
628 | res = lynx_ptrace (regset->set_request, inferior_ptid, (int) buf, | |
629 | 0, 0); | |
630 | } | |
631 | if (res < 0) | |
632 | perror ("ptrace"); | |
633 | free (buf); | |
634 | regset++; | |
635 | } | |
636 | } | |
637 | ||
638 | /* Implement the read_memory target_ops method. */ | |
639 | ||
640 | static int | |
641 | lynx_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) | |
642 | { | |
643 | /* On LynxOS, memory reads needs to be performed in chunks the size | |
644 | of int types, and they should also be aligned accordingly. */ | |
645 | int buf; | |
646 | const int xfer_size = sizeof (buf); | |
647 | CORE_ADDR addr = memaddr & -(CORE_ADDR) xfer_size; | |
124aceb4 | 648 | ptid_t inferior_ptid = ptid_of (current_thread); |
8ed54b31 JB |
649 | |
650 | while (addr < memaddr + len) | |
651 | { | |
652 | int skip = 0; | |
653 | int truncate = 0; | |
654 | ||
655 | errno = 0; | |
656 | if (addr < memaddr) | |
657 | skip = memaddr - addr; | |
658 | if (addr + xfer_size > memaddr + len) | |
659 | truncate = addr + xfer_size - memaddr - len; | |
660 | buf = lynx_ptrace (PTRACE_PEEKTEXT, inferior_ptid, addr, 0, 0); | |
661 | if (errno) | |
662 | return errno; | |
663 | memcpy (myaddr + (addr - memaddr) + skip, (gdb_byte *) &buf + skip, | |
664 | xfer_size - skip - truncate); | |
665 | addr += xfer_size; | |
666 | } | |
667 | ||
668 | return 0; | |
669 | } | |
670 | ||
671 | /* Implement the write_memory target_ops method. */ | |
672 | ||
673 | static int | |
674 | lynx_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len) | |
675 | { | |
676 | /* On LynxOS, memory writes needs to be performed in chunks the size | |
677 | of int types, and they should also be aligned accordingly. */ | |
678 | int buf; | |
679 | const int xfer_size = sizeof (buf); | |
680 | CORE_ADDR addr = memaddr & -(CORE_ADDR) xfer_size; | |
124aceb4 | 681 | ptid_t inferior_ptid = ptid_of (current_thread); |
8ed54b31 JB |
682 | |
683 | while (addr < memaddr + len) | |
684 | { | |
685 | int skip = 0; | |
686 | int truncate = 0; | |
687 | ||
688 | if (addr < memaddr) | |
689 | skip = memaddr - addr; | |
690 | if (addr + xfer_size > memaddr + len) | |
691 | truncate = addr + xfer_size - memaddr - len; | |
692 | if (skip > 0 || truncate > 0) | |
43968415 JB |
693 | { |
694 | /* We need to read the memory at this address in order to preserve | |
695 | the data that we are not overwriting. */ | |
696 | lynx_read_memory (addr, (unsigned char *) &buf, xfer_size); | |
697 | if (errno) | |
698 | return errno; | |
699 | } | |
8ed54b31 JB |
700 | memcpy ((gdb_byte *) &buf + skip, myaddr + (addr - memaddr) + skip, |
701 | xfer_size - skip - truncate); | |
702 | errno = 0; | |
703 | lynx_ptrace (PTRACE_POKETEXT, inferior_ptid, addr, buf, 0); | |
704 | if (errno) | |
705 | return errno; | |
706 | addr += xfer_size; | |
707 | } | |
708 | ||
709 | return 0; | |
710 | } | |
711 | ||
712 | /* Implement the kill_request target_ops method. */ | |
713 | ||
714 | static void | |
715 | lynx_request_interrupt (void) | |
716 | { | |
124aceb4 | 717 | ptid_t inferior_ptid = ptid_of (get_first_thread ()); |
8ed54b31 JB |
718 | |
719 | kill (lynx_ptid_get_pid (inferior_ptid), SIGINT); | |
720 | } | |
721 | ||
722 | /* The LynxOS target_ops vector. */ | |
723 | ||
724 | static struct target_ops lynx_target_ops = { | |
725 | lynx_create_inferior, | |
ece66d65 | 726 | NULL, /* post_create_inferior */ |
8ed54b31 JB |
727 | lynx_attach, |
728 | lynx_kill, | |
729 | lynx_detach, | |
730 | lynx_mourn, | |
731 | lynx_join, | |
732 | lynx_thread_alive, | |
733 | lynx_resume, | |
734 | lynx_wait, | |
735 | lynx_fetch_registers, | |
736 | lynx_store_registers, | |
737 | NULL, /* prepare_to_access_memory */ | |
738 | NULL, /* done_accessing_memory */ | |
739 | lynx_read_memory, | |
740 | lynx_write_memory, | |
741 | NULL, /* look_up_symbols */ | |
742 | lynx_request_interrupt, | |
743 | NULL, /* read_auxv */ | |
802e8e6d | 744 | NULL, /* supports_z_point_type */ |
8ed54b31 JB |
745 | NULL, /* insert_point */ |
746 | NULL, /* remove_point */ | |
f5771b1d PA |
747 | NULL, /* stopped_by_sw_breakpoint */ |
748 | NULL, /* supports_stopped_by_sw_breakpoint */ | |
749 | NULL, /* stopped_by_hw_breakpoint */ | |
750 | NULL, /* supports_stopped_by_hw_breakpoint */ | |
70b90b91 | 751 | target_can_do_hardware_single_step, |
8ed54b31 JB |
752 | NULL, /* stopped_by_watchpoint */ |
753 | NULL, /* stopped_data_address */ | |
754 | NULL, /* read_offsets */ | |
755 | NULL, /* get_tls_address */ | |
756 | NULL, /* qxfer_spu */ | |
757 | NULL, /* hostio_last_error */ | |
758 | NULL, /* qxfer_osdata */ | |
759 | NULL, /* qxfer_siginfo */ | |
760 | NULL, /* supports_non_stop */ | |
761 | NULL, /* async */ | |
762 | NULL, /* start_non_stop */ | |
763 | NULL, /* supports_multi_process */ | |
89245bc0 DB |
764 | NULL, /* supports_fork_events */ |
765 | NULL, /* supports_vfork_events */ | |
94585166 | 766 | NULL, /* supports_exec_events */ |
de0d863e | 767 | NULL, /* handle_new_gdb_connection */ |
8ed54b31 JB |
768 | NULL, /* handle_monitor_command */ |
769 | }; | |
770 | ||
771 | void | |
772 | initialize_low (void) | |
773 | { | |
774 | set_target_ops (&lynx_target_ops); | |
775 | the_low_target.arch_setup (); | |
776 | } | |
777 |