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b80864fb | 1 | /* Low level interface to Windows debugging, for gdbserver. |
6aba47ca | 2 | Copyright (C) 2006, 2007 Free Software Foundation, Inc. |
b80864fb DJ |
3 | |
4 | Contributed by Leo Zayas. Based on "win32-nat.c" from GDB. | |
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., 51 Franklin Street, Fifth Floor, | |
21 | Boston, MA 02110-1301, USA. */ | |
22 | ||
23 | #include "server.h" | |
24 | #include "regcache.h" | |
25 | #include "gdb/signals.h" | |
26 | ||
27 | #include <windows.h> | |
28 | #include <imagehlp.h> | |
29 | #include <psapi.h> | |
30 | #include <sys/param.h> | |
31 | #include <malloc.h> | |
32 | #include <process.h> | |
33 | ||
34 | #ifndef USE_WIN32API | |
35 | #include <sys/cygwin.h> | |
36 | #endif | |
37 | ||
38 | #define LOG 0 | |
39 | ||
40 | #define OUTMSG(X) do { printf X; fflush (stdout); } while (0) | |
41 | #if LOG | |
42 | #define OUTMSG2(X) do { printf X; fflush (stdout); } while (0) | |
43 | #else | |
44 | #define OUTMSG2(X) | |
45 | #endif | |
46 | ||
47 | int debug_threads; | |
48 | int using_threads = 1; | |
49 | ||
50 | /* Globals. */ | |
51 | static HANDLE current_process_handle = NULL; | |
52 | static DWORD current_process_id = 0; | |
53 | static enum target_signal last_sig = TARGET_SIGNAL_0; | |
54 | ||
55 | /* The current debug event from WaitForDebugEvent. */ | |
56 | static DEBUG_EVENT current_event; | |
57 | ||
58 | static int debug_registers_changed = 0; | |
59 | static int debug_registers_used = 0; | |
60 | static unsigned dr[8]; | |
61 | ||
62 | typedef BOOL winapi_DebugActiveProcessStop (DWORD dwProcessId); | |
63 | typedef BOOL winapi_DebugSetProcessKillOnExit (BOOL KillOnExit); | |
64 | ||
65 | #define FLAG_TRACE_BIT 0x100 | |
66 | #define CONTEXT_DEBUGGER (CONTEXT_FULL | CONTEXT_FLOATING_POINT) | |
67 | #define CONTEXT_DEBUGGER_DR CONTEXT_DEBUGGER | CONTEXT_DEBUG_REGISTERS \ | |
68 | | CONTEXT_EXTENDED_REGISTERS | |
69 | ||
70 | /* Thread information structure used to track extra information about | |
71 | each thread. */ | |
72 | typedef struct thread_info_struct | |
73 | { | |
74 | DWORD tid; | |
75 | HANDLE h; | |
76 | int suspend_count; | |
77 | CONTEXT context; | |
78 | } thread_info; | |
79 | static DWORD main_thread_id = 0; | |
80 | ||
81 | /* Get the thread ID from the current selected inferior (the current | |
82 | thread). */ | |
83 | static DWORD | |
84 | current_inferior_tid (void) | |
85 | { | |
86 | thread_info *th = inferior_target_data (current_inferior); | |
87 | return th->tid; | |
88 | } | |
89 | ||
90 | /* Find a thread record given a thread id. If GET_CONTEXT is set then | |
91 | also retrieve the context for this thread. */ | |
92 | static thread_info * | |
93 | thread_rec (DWORD id, int get_context) | |
94 | { | |
95 | struct thread_info *thread; | |
96 | thread_info *th; | |
97 | ||
98 | thread = (struct thread_info *) find_inferior_id (&all_threads, id); | |
99 | if (thread == NULL) | |
100 | return NULL; | |
101 | ||
102 | th = inferior_target_data (thread); | |
103 | if (!th->suspend_count && get_context) | |
104 | { | |
105 | if (get_context > 0 && id != current_event.dwThreadId) | |
106 | th->suspend_count = SuspendThread (th->h) + 1; | |
107 | else if (get_context < 0) | |
108 | th->suspend_count = -1; | |
109 | ||
110 | th->context.ContextFlags = CONTEXT_DEBUGGER_DR; | |
111 | ||
112 | GetThreadContext (th->h, &th->context); | |
113 | ||
114 | if (id == current_event.dwThreadId) | |
115 | { | |
116 | /* Copy dr values from that thread. */ | |
117 | dr[0] = th->context.Dr0; | |
118 | dr[1] = th->context.Dr1; | |
119 | dr[2] = th->context.Dr2; | |
120 | dr[3] = th->context.Dr3; | |
121 | dr[6] = th->context.Dr6; | |
122 | dr[7] = th->context.Dr7; | |
123 | } | |
124 | } | |
125 | ||
126 | return th; | |
127 | } | |
128 | ||
129 | /* Add a thread to the thread list. */ | |
130 | static thread_info * | |
131 | child_add_thread (DWORD tid, HANDLE h) | |
132 | { | |
133 | thread_info *th; | |
134 | ||
135 | if ((th = thread_rec (tid, FALSE))) | |
136 | return th; | |
137 | ||
138 | th = (thread_info *) malloc (sizeof (*th)); | |
139 | memset (th, 0, sizeof (*th)); | |
140 | th->tid = tid; | |
141 | th->h = h; | |
142 | ||
143 | add_thread (tid, th, (unsigned int) tid); | |
144 | set_inferior_regcache_data ((struct thread_info *) | |
145 | find_inferior_id (&all_threads, tid), | |
146 | new_register_cache ()); | |
147 | ||
148 | /* Set the debug registers for the new thread if they are used. */ | |
149 | if (debug_registers_used) | |
150 | { | |
151 | /* Only change the value of the debug registers. */ | |
152 | th->context.ContextFlags = CONTEXT_DEBUGGER_DR; | |
153 | ||
154 | GetThreadContext (th->h, &th->context); | |
155 | ||
156 | th->context.Dr0 = dr[0]; | |
157 | th->context.Dr1 = dr[1]; | |
158 | th->context.Dr2 = dr[2]; | |
159 | th->context.Dr3 = dr[3]; | |
160 | /* th->context.Dr6 = dr[6]; | |
161 | FIXME: should we set dr6 also ?? */ | |
162 | th->context.Dr7 = dr[7]; | |
163 | SetThreadContext (th->h, &th->context); | |
164 | th->context.ContextFlags = 0; | |
165 | } | |
166 | ||
167 | return th; | |
168 | } | |
169 | ||
170 | /* Delete a thread from the list of threads. */ | |
171 | static void | |
172 | delete_thread_info (struct inferior_list_entry *thread) | |
173 | { | |
174 | thread_info *th = inferior_target_data ((struct thread_info *) thread); | |
175 | ||
176 | remove_thread ((struct thread_info *) thread); | |
177 | CloseHandle (th->h); | |
178 | free (th); | |
179 | } | |
180 | ||
181 | /* Delete a thread from the list of threads. */ | |
182 | static void | |
183 | child_delete_thread (DWORD id) | |
184 | { | |
185 | struct inferior_list_entry *thread; | |
186 | ||
187 | /* If the last thread is exiting, just return. */ | |
188 | if (all_threads.head == all_threads.tail) | |
189 | return; | |
190 | ||
191 | thread = find_inferior_id (&all_threads, id); | |
192 | if (thread == NULL) | |
193 | return; | |
194 | ||
195 | delete_thread_info (thread); | |
196 | } | |
197 | ||
198 | /* Transfer memory from/to the debugged process. */ | |
199 | static int | |
200 | child_xfer_memory (CORE_ADDR memaddr, char *our, int len, | |
201 | int write, struct target_ops *target) | |
202 | { | |
203 | SIZE_T done; | |
204 | long addr = (long) memaddr; | |
205 | ||
206 | if (write) | |
207 | { | |
208 | WriteProcessMemory (current_process_handle, (LPVOID) addr, | |
209 | (LPCVOID) our, len, &done); | |
210 | FlushInstructionCache (current_process_handle, (LPCVOID) addr, len); | |
211 | } | |
212 | else | |
213 | { | |
214 | ReadProcessMemory (current_process_handle, (LPCVOID) addr, (LPVOID) our, | |
215 | len, &done); | |
216 | } | |
217 | return done; | |
218 | } | |
219 | ||
220 | /* Generally, what has the program done? */ | |
221 | enum target_waitkind | |
222 | { | |
223 | /* The program has exited. The exit status is in value.integer. */ | |
224 | TARGET_WAITKIND_EXITED, | |
225 | ||
226 | /* The program has stopped with a signal. Which signal is in | |
227 | value.sig. */ | |
228 | TARGET_WAITKIND_STOPPED, | |
229 | ||
230 | /* The program is letting us know that it dynamically loaded something | |
231 | (e.g. it called load(2) on AIX). */ | |
232 | TARGET_WAITKIND_LOADED, | |
233 | ||
234 | /* The program has exec'ed a new executable file. The new file's | |
235 | pathname is pointed to by value.execd_pathname. */ | |
236 | ||
237 | TARGET_WAITKIND_EXECD, | |
238 | ||
239 | /* Nothing happened, but we stopped anyway. This perhaps should be handled | |
240 | within target_wait, but I'm not sure target_wait should be resuming the | |
241 | inferior. */ | |
242 | TARGET_WAITKIND_SPURIOUS, | |
243 | }; | |
244 | ||
245 | struct target_waitstatus | |
246 | { | |
247 | enum target_waitkind kind; | |
248 | ||
249 | /* Forked child pid, execd pathname, exit status or signal number. */ | |
250 | union | |
251 | { | |
252 | int integer; | |
253 | enum target_signal sig; | |
254 | int related_pid; | |
255 | char *execd_pathname; | |
256 | int syscall_id; | |
257 | } | |
258 | value; | |
259 | }; | |
260 | ||
261 | #define NUM_REGS 41 | |
262 | #define FCS_REGNUM 27 | |
263 | #define FOP_REGNUM 31 | |
264 | ||
265 | #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x)) | |
266 | static const int mappings[] = { | |
267 | context_offset (Eax), | |
268 | context_offset (Ecx), | |
269 | context_offset (Edx), | |
270 | context_offset (Ebx), | |
271 | context_offset (Esp), | |
272 | context_offset (Ebp), | |
273 | context_offset (Esi), | |
274 | context_offset (Edi), | |
275 | context_offset (Eip), | |
276 | context_offset (EFlags), | |
277 | context_offset (SegCs), | |
278 | context_offset (SegSs), | |
279 | context_offset (SegDs), | |
280 | context_offset (SegEs), | |
281 | context_offset (SegFs), | |
282 | context_offset (SegGs), | |
283 | context_offset (FloatSave.RegisterArea[0 * 10]), | |
284 | context_offset (FloatSave.RegisterArea[1 * 10]), | |
285 | context_offset (FloatSave.RegisterArea[2 * 10]), | |
286 | context_offset (FloatSave.RegisterArea[3 * 10]), | |
287 | context_offset (FloatSave.RegisterArea[4 * 10]), | |
288 | context_offset (FloatSave.RegisterArea[5 * 10]), | |
289 | context_offset (FloatSave.RegisterArea[6 * 10]), | |
290 | context_offset (FloatSave.RegisterArea[7 * 10]), | |
291 | context_offset (FloatSave.ControlWord), | |
292 | context_offset (FloatSave.StatusWord), | |
293 | context_offset (FloatSave.TagWord), | |
294 | context_offset (FloatSave.ErrorSelector), | |
295 | context_offset (FloatSave.ErrorOffset), | |
296 | context_offset (FloatSave.DataSelector), | |
297 | context_offset (FloatSave.DataOffset), | |
298 | context_offset (FloatSave.ErrorSelector), | |
299 | /* XMM0-7 */ | |
300 | context_offset (ExtendedRegisters[10 * 16]), | |
301 | context_offset (ExtendedRegisters[11 * 16]), | |
302 | context_offset (ExtendedRegisters[12 * 16]), | |
303 | context_offset (ExtendedRegisters[13 * 16]), | |
304 | context_offset (ExtendedRegisters[14 * 16]), | |
305 | context_offset (ExtendedRegisters[15 * 16]), | |
306 | context_offset (ExtendedRegisters[16 * 16]), | |
307 | context_offset (ExtendedRegisters[17 * 16]), | |
308 | /* MXCSR */ | |
309 | context_offset (ExtendedRegisters[24]) | |
310 | }; | |
311 | ||
312 | #undef context_offset | |
313 | ||
314 | /* Clear out any old thread list and reintialize it to a pristine | |
315 | state. */ | |
316 | static void | |
317 | child_init_thread_list (void) | |
318 | { | |
319 | for_each_inferior (&all_threads, delete_thread_info); | |
320 | } | |
321 | ||
322 | static void | |
323 | do_initial_child_stuff (DWORD pid) | |
324 | { | |
325 | int i; | |
326 | ||
327 | last_sig = TARGET_SIGNAL_0; | |
328 | ||
329 | debug_registers_changed = 0; | |
330 | debug_registers_used = 0; | |
331 | for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++) | |
332 | dr[i] = 0; | |
333 | memset (¤t_event, 0, sizeof (current_event)); | |
334 | ||
335 | child_init_thread_list (); | |
336 | } | |
337 | ||
338 | /* Resume all artificially suspended threads if we are continuing | |
339 | execution. */ | |
340 | static int | |
341 | continue_one_thread (struct inferior_list_entry *this_thread, void *id_ptr) | |
342 | { | |
343 | struct thread_info *thread = (struct thread_info *) this_thread; | |
344 | int thread_id = * (int *) id_ptr; | |
345 | thread_info *th = inferior_target_data (thread); | |
346 | int i; | |
347 | ||
348 | if ((thread_id == -1 || thread_id == th->tid) | |
349 | && th->suspend_count) | |
350 | { | |
351 | for (i = 0; i < th->suspend_count; i++) | |
352 | (void) ResumeThread (th->h); | |
353 | th->suspend_count = 0; | |
354 | if (debug_registers_changed) | |
355 | { | |
356 | /* Only change the value of the debug registers. */ | |
357 | th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; | |
358 | th->context.Dr0 = dr[0]; | |
359 | th->context.Dr1 = dr[1]; | |
360 | th->context.Dr2 = dr[2]; | |
361 | th->context.Dr3 = dr[3]; | |
362 | /* th->context.Dr6 = dr[6]; | |
363 | FIXME: should we set dr6 also ?? */ | |
364 | th->context.Dr7 = dr[7]; | |
365 | SetThreadContext (th->h, &th->context); | |
366 | th->context.ContextFlags = 0; | |
367 | } | |
368 | } | |
369 | ||
370 | return 0; | |
371 | } | |
372 | ||
373 | static BOOL | |
374 | child_continue (DWORD continue_status, int thread_id) | |
375 | { | |
376 | BOOL res; | |
377 | ||
378 | res = ContinueDebugEvent (current_event.dwProcessId, | |
379 | current_event.dwThreadId, continue_status); | |
380 | continue_status = 0; | |
381 | if (res) | |
382 | find_inferior (&all_threads, continue_one_thread, &thread_id); | |
383 | ||
384 | debug_registers_changed = 0; | |
385 | return res; | |
386 | } | |
387 | ||
388 | /* Fetch register(s) from gdbserver regcache data. */ | |
389 | static void | |
390 | do_child_fetch_inferior_registers (thread_info *th, int r) | |
391 | { | |
392 | char *context_offset = ((char *) &th->context) + mappings[r]; | |
393 | long l; | |
394 | if (r == FCS_REGNUM) | |
395 | { | |
396 | l = *((long *) context_offset) & 0xffff; | |
397 | supply_register (r, (char *) &l); | |
398 | } | |
399 | else if (r == FOP_REGNUM) | |
400 | { | |
401 | l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1); | |
402 | supply_register (r, (char *) &l); | |
403 | } | |
404 | else | |
405 | supply_register (r, context_offset); | |
406 | } | |
407 | ||
408 | /* Fetch register(s) from the current thread context. */ | |
409 | static void | |
410 | child_fetch_inferior_registers (int r) | |
411 | { | |
412 | int regno; | |
413 | thread_info *th = thread_rec (current_inferior_tid (), TRUE); | |
414 | if (r == -1 || r == 0 || r > NUM_REGS) | |
415 | child_fetch_inferior_registers (NUM_REGS); | |
416 | else | |
417 | for (regno = 0; regno < r; regno++) | |
418 | do_child_fetch_inferior_registers (th, regno); | |
419 | } | |
420 | ||
421 | /* Get register from gdbserver regcache data. */ | |
422 | static void | |
423 | do_child_store_inferior_registers (thread_info *th, int r) | |
424 | { | |
425 | collect_register (r, ((char *) &th->context) + mappings[r]); | |
426 | } | |
427 | ||
428 | /* Store a new register value into the current thread context. We don't | |
429 | change the program's context until later, when we resume it. */ | |
430 | static void | |
431 | child_store_inferior_registers (int r) | |
432 | { | |
433 | int regno; | |
434 | thread_info *th = thread_rec (current_inferior_tid (), TRUE); | |
435 | if (r == -1 || r == 0 || r > NUM_REGS) | |
436 | child_store_inferior_registers (NUM_REGS); | |
437 | else | |
438 | for (regno = 0; regno < r; regno++) | |
439 | do_child_store_inferior_registers (th, regno); | |
440 | } | |
441 | ||
442 | /* Start a new process. | |
443 | PROGRAM is a path to the program to execute. | |
444 | ARGS is a standard NULL-terminated array of arguments, | |
445 | to be passed to the inferior as ``argv''. | |
446 | Returns the new PID on success, -1 on failure. Registers the new | |
447 | process with the process list. */ | |
448 | static int | |
449 | win32_create_inferior (char *program, char **program_args) | |
450 | { | |
451 | #ifndef USE_WIN32API | |
452 | char real_path[MAXPATHLEN]; | |
453 | char *orig_path, *new_path, *path_ptr; | |
454 | #endif | |
455 | char *winenv = NULL; | |
456 | STARTUPINFO si; | |
457 | PROCESS_INFORMATION pi; | |
458 | BOOL ret; | |
459 | DWORD flags; | |
460 | char *args; | |
461 | int argslen; | |
462 | int argc; | |
463 | ||
464 | if (!program) | |
465 | error ("No executable specified, specify executable to debug.\n"); | |
466 | ||
467 | memset (&si, 0, sizeof (si)); | |
468 | si.cb = sizeof (si); | |
469 | ||
470 | flags = DEBUG_PROCESS | DEBUG_ONLY_THIS_PROCESS; | |
471 | ||
472 | #ifndef USE_WIN32API | |
473 | orig_path = NULL; | |
474 | path_ptr = getenv ("PATH"); | |
475 | if (path_ptr) | |
476 | { | |
477 | orig_path = alloca (strlen (path_ptr) + 1); | |
478 | new_path = alloca (cygwin_posix_to_win32_path_list_buf_size (path_ptr)); | |
479 | strcpy (orig_path, path_ptr); | |
480 | cygwin_posix_to_win32_path_list (path_ptr, new_path); | |
481 | setenv ("PATH", new_path, 1); | |
482 | } | |
483 | cygwin_conv_to_win32_path (program, real_path); | |
484 | program = real_path; | |
485 | #endif | |
486 | ||
487 | argslen = strlen (program) + 1; | |
488 | for (argc = 1; program_args[argc]; argc++) | |
489 | argslen += strlen (program_args[argc]) + 1; | |
490 | args = alloca (argslen); | |
491 | strcpy (args, program); | |
492 | for (argc = 1; program_args[argc]; argc++) | |
493 | { | |
494 | /* FIXME: Can we do better about quoting? How does Cygwin | |
495 | handle this? */ | |
496 | strcat (args, " "); | |
497 | strcat (args, program_args[argc]); | |
498 | } | |
499 | OUTMSG2 (("Command line is %s\n", args)); | |
500 | ||
501 | flags |= CREATE_NEW_PROCESS_GROUP; | |
502 | ||
503 | ret = CreateProcess (0, args, /* command line */ | |
504 | NULL, /* Security */ | |
505 | NULL, /* thread */ | |
506 | TRUE, /* inherit handles */ | |
507 | flags, /* start flags */ | |
508 | winenv, NULL, /* current directory */ | |
509 | &si, &pi); | |
510 | ||
511 | #ifndef USE_WIN32API | |
512 | if (orig_path) | |
513 | setenv ("PATH", orig_path, 1); | |
514 | #endif | |
515 | ||
516 | if (!ret) | |
517 | { | |
518 | error ("Error creating process %s, (error %d): %s\n", args, | |
519 | (int) GetLastError (), strerror (GetLastError ())); | |
520 | } | |
521 | else | |
522 | { | |
523 | OUTMSG2 (("Process created: %s\n", (char *) args)); | |
524 | } | |
525 | ||
526 | CloseHandle (pi.hThread); | |
527 | ||
528 | current_process_handle = pi.hProcess; | |
529 | current_process_id = pi.dwProcessId; | |
530 | ||
531 | do_initial_child_stuff (current_process_id); | |
532 | ||
533 | return current_process_id; | |
534 | } | |
535 | ||
536 | /* Attach to a running process. | |
537 | PID is the process ID to attach to, specified by the user | |
538 | or a higher layer. */ | |
539 | static int | |
540 | win32_attach (unsigned long pid) | |
541 | { | |
542 | int res = 0; | |
543 | HMODULE kernel32 = LoadLibrary ("KERNEL32.DLL"); | |
544 | winapi_DebugActiveProcessStop *DebugActiveProcessStop = NULL; | |
545 | winapi_DebugSetProcessKillOnExit *DebugSetProcessKillOnExit = NULL; | |
546 | ||
547 | DebugActiveProcessStop = | |
548 | (winapi_DebugActiveProcessStop *) GetProcAddress (kernel32, | |
549 | "DebugActiveProcessStop"); | |
550 | DebugSetProcessKillOnExit = | |
551 | (winapi_DebugSetProcessKillOnExit *) GetProcAddress (kernel32, | |
552 | "DebugSetProcessKillOnExit"); | |
553 | ||
554 | res = DebugActiveProcess (pid) ? 1 : 0; | |
555 | ||
556 | if (!res) | |
557 | error ("Attach to process failed."); | |
558 | ||
559 | if (DebugSetProcessKillOnExit != NULL) | |
560 | DebugSetProcessKillOnExit (FALSE); | |
561 | ||
562 | current_process_id = pid; | |
563 | current_process_handle = OpenProcess (PROCESS_ALL_ACCESS, FALSE, pid); | |
564 | ||
565 | if (current_process_handle == NULL) | |
566 | { | |
567 | res = 0; | |
568 | if (DebugActiveProcessStop != NULL) | |
569 | DebugActiveProcessStop (current_process_id); | |
570 | } | |
571 | ||
572 | if (res) | |
573 | do_initial_child_stuff (pid); | |
574 | ||
575 | FreeLibrary (kernel32); | |
576 | ||
577 | return res; | |
578 | } | |
579 | ||
580 | /* Kill all inferiors. */ | |
581 | static void | |
582 | win32_kill (void) | |
583 | { | |
9d606399 DJ |
584 | if (current_process_handle == NULL) |
585 | return; | |
586 | ||
b80864fb DJ |
587 | TerminateProcess (current_process_handle, 0); |
588 | for (;;) | |
589 | { | |
590 | if (!child_continue (DBG_CONTINUE, -1)) | |
591 | break; | |
592 | if (!WaitForDebugEvent (¤t_event, INFINITE)) | |
593 | break; | |
594 | if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT) | |
595 | break; | |
596 | } | |
597 | } | |
598 | ||
599 | /* Detach from all inferiors. */ | |
600 | static void | |
601 | win32_detach (void) | |
602 | { | |
603 | HMODULE kernel32 = LoadLibrary ("KERNEL32.DLL"); | |
604 | winapi_DebugActiveProcessStop *DebugActiveProcessStop = NULL; | |
605 | winapi_DebugSetProcessKillOnExit *DebugSetProcessKillOnExit = NULL; | |
606 | ||
607 | DebugActiveProcessStop = | |
608 | (winapi_DebugActiveProcessStop *) GetProcAddress (kernel32, | |
609 | "DebugActiveProcessStop"); | |
610 | DebugSetProcessKillOnExit = | |
611 | (winapi_DebugSetProcessKillOnExit *) GetProcAddress (kernel32, | |
612 | "DebugSetProcessKillOnExit"); | |
613 | ||
614 | if (DebugSetProcessKillOnExit != NULL) | |
615 | DebugSetProcessKillOnExit (FALSE); | |
616 | ||
617 | if (DebugActiveProcessStop != NULL) | |
618 | DebugActiveProcessStop (current_process_id); | |
619 | else | |
620 | win32_kill (); | |
621 | ||
622 | FreeLibrary (kernel32); | |
623 | } | |
624 | ||
625 | /* Return 1 iff the thread with thread ID TID is alive. */ | |
626 | static int | |
627 | win32_thread_alive (unsigned long tid) | |
628 | { | |
629 | int res; | |
630 | ||
631 | /* Our thread list is reliable; don't bother to poll target | |
632 | threads. */ | |
633 | if (find_inferior_id (&all_threads, tid) != NULL) | |
634 | res = 1; | |
635 | else | |
636 | res = 0; | |
637 | return res; | |
638 | } | |
639 | ||
640 | /* Resume the inferior process. RESUME_INFO describes how we want | |
641 | to resume. */ | |
642 | static void | |
643 | win32_resume (struct thread_resume *resume_info) | |
644 | { | |
645 | DWORD tid; | |
646 | enum target_signal sig; | |
647 | int step; | |
648 | thread_info *th; | |
649 | DWORD continue_status = DBG_CONTINUE; | |
650 | ||
651 | /* This handles the very limited set of resume packets that GDB can | |
652 | currently produce. */ | |
653 | ||
654 | if (resume_info[0].thread == -1) | |
655 | tid = -1; | |
656 | else if (resume_info[1].thread == -1 && !resume_info[1].leave_stopped) | |
657 | tid = -1; | |
658 | else | |
659 | /* Yes, we're ignoring resume_info[0].thread. It'd be tricky to make | |
660 | the Windows resume code do the right thing for thread switching. */ | |
661 | tid = current_event.dwThreadId; | |
662 | ||
663 | if (resume_info[0].thread != -1) | |
664 | { | |
665 | sig = resume_info[0].sig; | |
666 | step = resume_info[0].step; | |
667 | } | |
668 | else | |
669 | { | |
670 | sig = 0; | |
671 | step = 0; | |
672 | } | |
673 | ||
674 | if (sig != TARGET_SIGNAL_0) | |
675 | { | |
676 | if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT) | |
677 | { | |
678 | OUTMSG (("Cannot continue with signal %d here.\n", sig)); | |
679 | } | |
680 | else if (sig == last_sig) | |
681 | continue_status = DBG_EXCEPTION_NOT_HANDLED; | |
682 | else | |
683 | OUTMSG (("Can only continue with recieved signal %d.\n", last_sig)); | |
684 | } | |
685 | ||
686 | last_sig = TARGET_SIGNAL_0; | |
687 | ||
688 | /* Get context for the currently selected thread. */ | |
689 | th = thread_rec (current_event.dwThreadId, FALSE); | |
690 | if (th) | |
691 | { | |
692 | if (th->context.ContextFlags) | |
693 | { | |
694 | if (debug_registers_changed) | |
695 | { | |
696 | th->context.Dr0 = dr[0]; | |
697 | th->context.Dr1 = dr[1]; | |
698 | th->context.Dr2 = dr[2]; | |
699 | th->context.Dr3 = dr[3]; | |
700 | /* th->context.Dr6 = dr[6]; | |
701 | FIXME: should we set dr6 also ?? */ | |
702 | th->context.Dr7 = dr[7]; | |
703 | } | |
704 | ||
705 | /* Move register values from the inferior into the thread | |
706 | context structure. */ | |
707 | regcache_invalidate (); | |
708 | ||
709 | if (step) | |
710 | th->context.EFlags |= FLAG_TRACE_BIT; | |
711 | ||
712 | SetThreadContext (th->h, &th->context); | |
713 | th->context.ContextFlags = 0; | |
714 | } | |
715 | } | |
716 | ||
717 | /* Allow continuing with the same signal that interrupted us. | |
718 | Otherwise complain. */ | |
719 | ||
720 | child_continue (continue_status, tid); | |
721 | } | |
722 | ||
723 | static int | |
724 | handle_exception (struct target_waitstatus *ourstatus) | |
725 | { | |
726 | thread_info *th; | |
727 | DWORD code = current_event.u.Exception.ExceptionRecord.ExceptionCode; | |
728 | ||
729 | ourstatus->kind = TARGET_WAITKIND_STOPPED; | |
730 | ||
731 | /* Record the context of the current thread. */ | |
732 | th = thread_rec (current_event.dwThreadId, -1); | |
733 | ||
734 | switch (code) | |
735 | { | |
736 | case EXCEPTION_ACCESS_VIOLATION: | |
737 | OUTMSG2 (("EXCEPTION_ACCESS_VIOLATION")); | |
738 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; | |
739 | break; | |
740 | case STATUS_STACK_OVERFLOW: | |
741 | OUTMSG2 (("STATUS_STACK_OVERFLOW")); | |
742 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; | |
743 | break; | |
744 | case STATUS_FLOAT_DENORMAL_OPERAND: | |
745 | OUTMSG2 (("STATUS_FLOAT_DENORMAL_OPERAND")); | |
746 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
747 | break; | |
748 | case EXCEPTION_ARRAY_BOUNDS_EXCEEDED: | |
749 | OUTMSG2 (("EXCEPTION_ARRAY_BOUNDS_EXCEEDED")); | |
750 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
751 | break; | |
752 | case STATUS_FLOAT_INEXACT_RESULT: | |
753 | OUTMSG2 (("STATUS_FLOAT_INEXACT_RESULT")); | |
754 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
755 | break; | |
756 | case STATUS_FLOAT_INVALID_OPERATION: | |
757 | OUTMSG2 (("STATUS_FLOAT_INVALID_OPERATION")); | |
758 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
759 | break; | |
760 | case STATUS_FLOAT_OVERFLOW: | |
761 | OUTMSG2 (("STATUS_FLOAT_OVERFLOW")); | |
762 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
763 | break; | |
764 | case STATUS_FLOAT_STACK_CHECK: | |
765 | OUTMSG2 (("STATUS_FLOAT_STACK_CHECK")); | |
766 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
767 | break; | |
768 | case STATUS_FLOAT_UNDERFLOW: | |
769 | OUTMSG2 (("STATUS_FLOAT_UNDERFLOW")); | |
770 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
771 | break; | |
772 | case STATUS_FLOAT_DIVIDE_BY_ZERO: | |
773 | OUTMSG2 (("STATUS_FLOAT_DIVIDE_BY_ZERO")); | |
774 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
775 | break; | |
776 | case STATUS_INTEGER_DIVIDE_BY_ZERO: | |
777 | OUTMSG2 (("STATUS_INTEGER_DIVIDE_BY_ZERO")); | |
778 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
779 | break; | |
780 | case STATUS_INTEGER_OVERFLOW: | |
781 | OUTMSG2 (("STATUS_INTEGER_OVERFLOW")); | |
782 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
783 | break; | |
784 | case EXCEPTION_BREAKPOINT: | |
785 | OUTMSG2 (("EXCEPTION_BREAKPOINT")); | |
786 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; | |
787 | break; | |
788 | case DBG_CONTROL_C: | |
789 | OUTMSG2 (("DBG_CONTROL_C")); | |
790 | ourstatus->value.sig = TARGET_SIGNAL_INT; | |
791 | break; | |
792 | case DBG_CONTROL_BREAK: | |
793 | OUTMSG2 (("DBG_CONTROL_BREAK")); | |
794 | ourstatus->value.sig = TARGET_SIGNAL_INT; | |
795 | break; | |
796 | case EXCEPTION_SINGLE_STEP: | |
797 | OUTMSG2 (("EXCEPTION_SINGLE_STEP")); | |
798 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; | |
799 | break; | |
800 | case EXCEPTION_ILLEGAL_INSTRUCTION: | |
801 | OUTMSG2 (("EXCEPTION_ILLEGAL_INSTRUCTION")); | |
802 | ourstatus->value.sig = TARGET_SIGNAL_ILL; | |
803 | break; | |
804 | case EXCEPTION_PRIV_INSTRUCTION: | |
805 | OUTMSG2 (("EXCEPTION_PRIV_INSTRUCTION")); | |
806 | ourstatus->value.sig = TARGET_SIGNAL_ILL; | |
807 | break; | |
808 | case EXCEPTION_NONCONTINUABLE_EXCEPTION: | |
809 | OUTMSG2 (("EXCEPTION_NONCONTINUABLE_EXCEPTION")); | |
810 | ourstatus->value.sig = TARGET_SIGNAL_ILL; | |
811 | break; | |
812 | default: | |
813 | if (current_event.u.Exception.dwFirstChance) | |
814 | return 0; | |
815 | OUTMSG2 (("gdbserver: unknown target exception 0x%08lx at 0x%08lx", | |
816 | current_event.u.Exception.ExceptionRecord.ExceptionCode, | |
817 | (DWORD) current_event.u.Exception.ExceptionRecord. | |
818 | ExceptionAddress)); | |
819 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; | |
820 | break; | |
821 | } | |
822 | OUTMSG2 (("\n")); | |
823 | last_sig = ourstatus->value.sig; | |
824 | return 1; | |
825 | } | |
826 | ||
827 | /* Get the next event from the child. Return 1 if the event requires | |
828 | handling. */ | |
829 | static int | |
830 | get_child_debug_event (struct target_waitstatus *ourstatus) | |
831 | { | |
832 | BOOL debug_event; | |
833 | DWORD continue_status, event_code; | |
834 | thread_info *th = NULL; | |
835 | static thread_info dummy_thread_info; | |
836 | int retval = 0; | |
837 | ||
838 | in: | |
839 | ||
840 | last_sig = TARGET_SIGNAL_0; | |
841 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
842 | ||
843 | if (!(debug_event = WaitForDebugEvent (¤t_event, 1000))) | |
844 | goto out; | |
845 | ||
846 | current_inferior = | |
847 | (struct thread_info *) find_inferior_id (&all_threads, | |
848 | current_event.dwThreadId); | |
849 | ||
850 | continue_status = DBG_CONTINUE; | |
851 | event_code = current_event.dwDebugEventCode; | |
852 | ||
853 | switch (event_code) | |
854 | { | |
855 | case CREATE_THREAD_DEBUG_EVENT: | |
856 | OUTMSG2 (("gdbserver: kernel event CREATE_THREAD_DEBUG_EVENT " | |
857 | "for pid=%d tid=%x)\n", | |
858 | (unsigned) current_event.dwProcessId, | |
859 | (unsigned) current_event.dwThreadId)); | |
860 | ||
861 | /* Record the existence of this thread. */ | |
862 | th = child_add_thread (current_event.dwThreadId, | |
863 | current_event.u.CreateThread.hThread); | |
864 | ||
865 | retval = current_event.dwThreadId; | |
866 | break; | |
867 | ||
868 | case EXIT_THREAD_DEBUG_EVENT: | |
869 | OUTMSG2 (("gdbserver: kernel event EXIT_THREAD_DEBUG_EVENT " | |
870 | "for pid=%d tid=%x\n", | |
871 | (unsigned) current_event.dwProcessId, | |
872 | (unsigned) current_event.dwThreadId)); | |
873 | child_delete_thread (current_event.dwThreadId); | |
874 | th = &dummy_thread_info; | |
875 | break; | |
876 | ||
877 | case CREATE_PROCESS_DEBUG_EVENT: | |
878 | OUTMSG2 (("gdbserver: kernel event CREATE_PROCESS_DEBUG_EVENT " | |
879 | "for pid=%d tid=%x\n", | |
880 | (unsigned) current_event.dwProcessId, | |
881 | (unsigned) current_event.dwThreadId)); | |
882 | CloseHandle (current_event.u.CreateProcessInfo.hFile); | |
883 | ||
884 | current_process_handle = current_event.u.CreateProcessInfo.hProcess; | |
885 | main_thread_id = current_event.dwThreadId; | |
886 | ||
887 | ourstatus->kind = TARGET_WAITKIND_EXECD; | |
888 | ourstatus->value.execd_pathname = "Main executable"; | |
889 | ||
890 | /* Add the main thread. */ | |
891 | th = | |
892 | child_add_thread (main_thread_id, | |
893 | current_event.u.CreateProcessInfo.hThread); | |
894 | ||
895 | retval = ourstatus->value.related_pid = current_event.dwThreadId; | |
896 | break; | |
897 | ||
898 | case EXIT_PROCESS_DEBUG_EVENT: | |
899 | OUTMSG2 (("gdbserver: kernel event EXIT_PROCESS_DEBUG_EVENT " | |
900 | "for pid=%d tid=%x\n", | |
901 | (unsigned) current_event.dwProcessId, | |
902 | (unsigned) current_event.dwThreadId)); | |
903 | ourstatus->kind = TARGET_WAITKIND_EXITED; | |
904 | ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode; | |
905 | CloseHandle (current_process_handle); | |
9d606399 | 906 | current_process_handle = NULL; |
b80864fb DJ |
907 | retval = main_thread_id; |
908 | break; | |
909 | ||
910 | case LOAD_DLL_DEBUG_EVENT: | |
911 | OUTMSG2 (("gdbserver: kernel event LOAD_DLL_DEBUG_EVENT " | |
912 | "for pid=%d tid=%x\n", | |
913 | (unsigned) current_event.dwProcessId, | |
914 | (unsigned) current_event.dwThreadId)); | |
915 | CloseHandle (current_event.u.LoadDll.hFile); | |
916 | ||
917 | ourstatus->kind = TARGET_WAITKIND_LOADED; | |
918 | ourstatus->value.integer = 0; | |
919 | retval = main_thread_id; | |
920 | break; | |
921 | ||
922 | case UNLOAD_DLL_DEBUG_EVENT: | |
923 | OUTMSG2 (("gdbserver: kernel event UNLOAD_DLL_DEBUG_EVENT " | |
924 | "for pid=%d tid=%x\n", | |
925 | (unsigned) current_event.dwProcessId, | |
926 | (unsigned) current_event.dwThreadId)); | |
927 | break; | |
928 | ||
929 | case EXCEPTION_DEBUG_EVENT: | |
930 | OUTMSG2 (("gdbserver: kernel event EXCEPTION_DEBUG_EVENT " | |
931 | "for pid=%d tid=%x\n", | |
932 | (unsigned) current_event.dwProcessId, | |
933 | (unsigned) current_event.dwThreadId)); | |
934 | retval = handle_exception (ourstatus); | |
935 | break; | |
936 | ||
937 | case OUTPUT_DEBUG_STRING_EVENT: | |
938 | /* A message from the kernel (or Cygwin). */ | |
939 | OUTMSG2 (("gdbserver: kernel event OUTPUT_DEBUG_STRING_EVENT " | |
940 | "for pid=%d tid=%x\n", | |
941 | (unsigned) current_event.dwProcessId, | |
942 | (unsigned) current_event.dwThreadId)); | |
943 | break; | |
944 | ||
945 | default: | |
946 | OUTMSG2 (("gdbserver: kernel event unknown " | |
947 | "for pid=%d tid=%x code=%ld\n", | |
948 | (unsigned) current_event.dwProcessId, | |
949 | (unsigned) current_event.dwThreadId, | |
950 | current_event.dwDebugEventCode)); | |
951 | break; | |
952 | } | |
953 | ||
954 | current_inferior = | |
955 | (struct thread_info *) find_inferior_id (&all_threads, | |
956 | current_event.dwThreadId); | |
957 | ||
958 | if (!retval || (event_code != EXCEPTION_DEBUG_EVENT && event_code != EXIT_PROCESS_DEBUG_EVENT)) | |
959 | { | |
960 | child_continue (continue_status, -1); | |
961 | goto in; | |
962 | } | |
963 | ||
964 | if (th == NULL) | |
965 | thread_rec (current_event.dwThreadId, TRUE); | |
966 | ||
967 | out: | |
968 | return retval; | |
969 | } | |
970 | ||
971 | /* Wait for the inferior process to change state. | |
972 | STATUS will be filled in with a response code to send to GDB. | |
973 | Returns the signal which caused the process to stop. */ | |
974 | static unsigned char | |
975 | win32_wait (char *status) | |
976 | { | |
977 | struct target_waitstatus our_status; | |
978 | ||
979 | *status = 'T'; | |
980 | ||
981 | while (1) | |
982 | { | |
983 | get_child_debug_event (&our_status); | |
984 | ||
985 | if (our_status.kind == TARGET_WAITKIND_EXITED) | |
986 | { | |
987 | OUTMSG2 (("Child exited with retcode = %x\n", | |
988 | our_status.value.integer)); | |
989 | ||
990 | *status = 'W'; | |
991 | ||
992 | child_fetch_inferior_registers (-1); | |
993 | ||
994 | return our_status.value.integer; | |
995 | } | |
996 | else if (our_status.kind == TARGET_WAITKIND_STOPPED) | |
997 | { | |
998 | OUTMSG2 (("Child Stopped with signal = %x \n", | |
999 | WSTOPSIG (our_status.value.sig))); | |
1000 | ||
1001 | *status = 'T'; | |
1002 | ||
1003 | child_fetch_inferior_registers (-1); | |
1004 | ||
1005 | return our_status.value.sig; | |
1006 | } | |
1007 | else | |
1008 | OUTMSG (("Ignoring unknown internal event, %d\n", our_status.kind)); | |
1009 | ||
1010 | { | |
1011 | struct thread_resume resume; | |
1012 | resume.thread = -1; | |
1013 | resume.step = 0; | |
1014 | resume.sig = 0; | |
1015 | resume.leave_stopped = 0; | |
1016 | win32_resume (&resume); | |
1017 | } | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | /* Fetch registers from the inferior process. | |
1022 | If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO. */ | |
1023 | static void | |
1024 | win32_fetch_inferior_registers (int regno) | |
1025 | { | |
1026 | child_fetch_inferior_registers (regno); | |
1027 | } | |
1028 | ||
1029 | /* Store registers to the inferior process. | |
1030 | If REGNO is -1, store all registers; otherwise, store at least REGNO. */ | |
1031 | static void | |
1032 | win32_store_inferior_registers (int regno) | |
1033 | { | |
1034 | child_store_inferior_registers (regno); | |
1035 | } | |
1036 | ||
1037 | /* Read memory from the inferior process. This should generally be | |
1038 | called through read_inferior_memory, which handles breakpoint shadowing. | |
1039 | Read LEN bytes at MEMADDR into a buffer at MYADDR. */ | |
1040 | static int | |
1041 | win32_read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) | |
1042 | { | |
1043 | return child_xfer_memory (memaddr, myaddr, len, 0, 0) != len; | |
1044 | } | |
1045 | ||
1046 | /* Write memory to the inferior process. This should generally be | |
1047 | called through write_inferior_memory, which handles breakpoint shadowing. | |
1048 | Write LEN bytes from the buffer at MYADDR to MEMADDR. | |
1049 | Returns 0 on success and errno on failure. */ | |
1050 | static int | |
1051 | win32_write_inferior_memory (CORE_ADDR memaddr, const unsigned char *myaddr, | |
1052 | int len) | |
1053 | { | |
1054 | return child_xfer_memory (memaddr, (char *) myaddr, len, 1, 0) != len; | |
1055 | } | |
1056 | ||
1057 | static struct target_ops win32_target_ops = { | |
1058 | win32_create_inferior, | |
1059 | win32_attach, | |
1060 | win32_kill, | |
1061 | win32_detach, | |
1062 | win32_thread_alive, | |
1063 | win32_resume, | |
1064 | win32_wait, | |
1065 | win32_fetch_inferior_registers, | |
1066 | win32_store_inferior_registers, | |
1067 | win32_read_inferior_memory, | |
1068 | win32_write_inferior_memory, | |
1069 | 0, | |
1070 | 0 | |
1071 | }; | |
1072 | ||
1073 | /* Initialize the Win32 backend. */ | |
1074 | void | |
1075 | initialize_low (void) | |
1076 | { | |
1077 | set_target_ops (&win32_target_ops); | |
1078 | ||
1079 | init_registers (); | |
1080 | } |