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1 | /* Low level interface to Windows debugging, for gdbserver. |
2 | Copyright (C) 2006 | |
3 | Free Software Foundation, Inc. | |
4 | ||
5 | Contributed by Leo Zayas. Based on "win32-nat.c" from GDB. | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
22 | Boston, MA 02110-1301, USA. */ | |
23 | ||
24 | #include "server.h" | |
25 | #include "regcache.h" | |
26 | #include "gdb/signals.h" | |
27 | ||
28 | #include <windows.h> | |
29 | #include <imagehlp.h> | |
30 | #include <psapi.h> | |
31 | #include <sys/param.h> | |
32 | #include <malloc.h> | |
33 | #include <process.h> | |
34 | ||
35 | #ifndef USE_WIN32API | |
36 | #include <sys/cygwin.h> | |
37 | #endif | |
38 | ||
39 | #define LOG 0 | |
40 | ||
41 | #define OUTMSG(X) do { printf X; fflush (stdout); } while (0) | |
42 | #if LOG | |
43 | #define OUTMSG2(X) do { printf X; fflush (stdout); } while (0) | |
44 | #else | |
45 | #define OUTMSG2(X) | |
46 | #endif | |
47 | ||
48 | int debug_threads; | |
49 | int using_threads = 1; | |
50 | ||
51 | /* Globals. */ | |
52 | static HANDLE current_process_handle = NULL; | |
53 | static DWORD current_process_id = 0; | |
54 | static enum target_signal last_sig = TARGET_SIGNAL_0; | |
55 | ||
56 | /* The current debug event from WaitForDebugEvent. */ | |
57 | static DEBUG_EVENT current_event; | |
58 | ||
59 | static int debug_registers_changed = 0; | |
60 | static int debug_registers_used = 0; | |
61 | static unsigned dr[8]; | |
62 | ||
63 | typedef BOOL winapi_DebugActiveProcessStop (DWORD dwProcessId); | |
64 | typedef BOOL winapi_DebugSetProcessKillOnExit (BOOL KillOnExit); | |
65 | ||
66 | #define FLAG_TRACE_BIT 0x100 | |
67 | #define CONTEXT_DEBUGGER (CONTEXT_FULL | CONTEXT_FLOATING_POINT) | |
68 | #define CONTEXT_DEBUGGER_DR CONTEXT_DEBUGGER | CONTEXT_DEBUG_REGISTERS \ | |
69 | | CONTEXT_EXTENDED_REGISTERS | |
70 | ||
71 | /* Thread information structure used to track extra information about | |
72 | each thread. */ | |
73 | typedef struct thread_info_struct | |
74 | { | |
75 | DWORD tid; | |
76 | HANDLE h; | |
77 | int suspend_count; | |
78 | CONTEXT context; | |
79 | } thread_info; | |
80 | static DWORD main_thread_id = 0; | |
81 | ||
82 | /* Get the thread ID from the current selected inferior (the current | |
83 | thread). */ | |
84 | static DWORD | |
85 | current_inferior_tid (void) | |
86 | { | |
87 | thread_info *th = inferior_target_data (current_inferior); | |
88 | return th->tid; | |
89 | } | |
90 | ||
91 | /* Find a thread record given a thread id. If GET_CONTEXT is set then | |
92 | also retrieve the context for this thread. */ | |
93 | static thread_info * | |
94 | thread_rec (DWORD id, int get_context) | |
95 | { | |
96 | struct thread_info *thread; | |
97 | thread_info *th; | |
98 | ||
99 | thread = (struct thread_info *) find_inferior_id (&all_threads, id); | |
100 | if (thread == NULL) | |
101 | return NULL; | |
102 | ||
103 | th = inferior_target_data (thread); | |
104 | if (!th->suspend_count && get_context) | |
105 | { | |
106 | if (get_context > 0 && id != current_event.dwThreadId) | |
107 | th->suspend_count = SuspendThread (th->h) + 1; | |
108 | else if (get_context < 0) | |
109 | th->suspend_count = -1; | |
110 | ||
111 | th->context.ContextFlags = CONTEXT_DEBUGGER_DR; | |
112 | ||
113 | GetThreadContext (th->h, &th->context); | |
114 | ||
115 | if (id == current_event.dwThreadId) | |
116 | { | |
117 | /* Copy dr values from that thread. */ | |
118 | dr[0] = th->context.Dr0; | |
119 | dr[1] = th->context.Dr1; | |
120 | dr[2] = th->context.Dr2; | |
121 | dr[3] = th->context.Dr3; | |
122 | dr[6] = th->context.Dr6; | |
123 | dr[7] = th->context.Dr7; | |
124 | } | |
125 | } | |
126 | ||
127 | return th; | |
128 | } | |
129 | ||
130 | /* Add a thread to the thread list. */ | |
131 | static thread_info * | |
132 | child_add_thread (DWORD tid, HANDLE h) | |
133 | { | |
134 | thread_info *th; | |
135 | ||
136 | if ((th = thread_rec (tid, FALSE))) | |
137 | return th; | |
138 | ||
139 | th = (thread_info *) malloc (sizeof (*th)); | |
140 | memset (th, 0, sizeof (*th)); | |
141 | th->tid = tid; | |
142 | th->h = h; | |
143 | ||
144 | add_thread (tid, th, (unsigned int) tid); | |
145 | set_inferior_regcache_data ((struct thread_info *) | |
146 | find_inferior_id (&all_threads, tid), | |
147 | new_register_cache ()); | |
148 | ||
149 | /* Set the debug registers for the new thread if they are used. */ | |
150 | if (debug_registers_used) | |
151 | { | |
152 | /* Only change the value of the debug registers. */ | |
153 | th->context.ContextFlags = CONTEXT_DEBUGGER_DR; | |
154 | ||
155 | GetThreadContext (th->h, &th->context); | |
156 | ||
157 | th->context.Dr0 = dr[0]; | |
158 | th->context.Dr1 = dr[1]; | |
159 | th->context.Dr2 = dr[2]; | |
160 | th->context.Dr3 = dr[3]; | |
161 | /* th->context.Dr6 = dr[6]; | |
162 | FIXME: should we set dr6 also ?? */ | |
163 | th->context.Dr7 = dr[7]; | |
164 | SetThreadContext (th->h, &th->context); | |
165 | th->context.ContextFlags = 0; | |
166 | } | |
167 | ||
168 | return th; | |
169 | } | |
170 | ||
171 | /* Delete a thread from the list of threads. */ | |
172 | static void | |
173 | delete_thread_info (struct inferior_list_entry *thread) | |
174 | { | |
175 | thread_info *th = inferior_target_data ((struct thread_info *) thread); | |
176 | ||
177 | remove_thread ((struct thread_info *) thread); | |
178 | CloseHandle (th->h); | |
179 | free (th); | |
180 | } | |
181 | ||
182 | /* Delete a thread from the list of threads. */ | |
183 | static void | |
184 | child_delete_thread (DWORD id) | |
185 | { | |
186 | struct inferior_list_entry *thread; | |
187 | ||
188 | /* If the last thread is exiting, just return. */ | |
189 | if (all_threads.head == all_threads.tail) | |
190 | return; | |
191 | ||
192 | thread = find_inferior_id (&all_threads, id); | |
193 | if (thread == NULL) | |
194 | return; | |
195 | ||
196 | delete_thread_info (thread); | |
197 | } | |
198 | ||
199 | /* Transfer memory from/to the debugged process. */ | |
200 | static int | |
201 | child_xfer_memory (CORE_ADDR memaddr, char *our, int len, | |
202 | int write, struct target_ops *target) | |
203 | { | |
204 | SIZE_T done; | |
205 | long addr = (long) memaddr; | |
206 | ||
207 | if (write) | |
208 | { | |
209 | WriteProcessMemory (current_process_handle, (LPVOID) addr, | |
210 | (LPCVOID) our, len, &done); | |
211 | FlushInstructionCache (current_process_handle, (LPCVOID) addr, len); | |
212 | } | |
213 | else | |
214 | { | |
215 | ReadProcessMemory (current_process_handle, (LPCVOID) addr, (LPVOID) our, | |
216 | len, &done); | |
217 | } | |
218 | return done; | |
219 | } | |
220 | ||
221 | /* Generally, what has the program done? */ | |
222 | enum target_waitkind | |
223 | { | |
224 | /* The program has exited. The exit status is in value.integer. */ | |
225 | TARGET_WAITKIND_EXITED, | |
226 | ||
227 | /* The program has stopped with a signal. Which signal is in | |
228 | value.sig. */ | |
229 | TARGET_WAITKIND_STOPPED, | |
230 | ||
231 | /* The program is letting us know that it dynamically loaded something | |
232 | (e.g. it called load(2) on AIX). */ | |
233 | TARGET_WAITKIND_LOADED, | |
234 | ||
235 | /* The program has exec'ed a new executable file. The new file's | |
236 | pathname is pointed to by value.execd_pathname. */ | |
237 | ||
238 | TARGET_WAITKIND_EXECD, | |
239 | ||
240 | /* Nothing happened, but we stopped anyway. This perhaps should be handled | |
241 | within target_wait, but I'm not sure target_wait should be resuming the | |
242 | inferior. */ | |
243 | TARGET_WAITKIND_SPURIOUS, | |
244 | }; | |
245 | ||
246 | struct target_waitstatus | |
247 | { | |
248 | enum target_waitkind kind; | |
249 | ||
250 | /* Forked child pid, execd pathname, exit status or signal number. */ | |
251 | union | |
252 | { | |
253 | int integer; | |
254 | enum target_signal sig; | |
255 | int related_pid; | |
256 | char *execd_pathname; | |
257 | int syscall_id; | |
258 | } | |
259 | value; | |
260 | }; | |
261 | ||
262 | #define NUM_REGS 41 | |
263 | #define FCS_REGNUM 27 | |
264 | #define FOP_REGNUM 31 | |
265 | ||
266 | #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x)) | |
267 | static const int mappings[] = { | |
268 | context_offset (Eax), | |
269 | context_offset (Ecx), | |
270 | context_offset (Edx), | |
271 | context_offset (Ebx), | |
272 | context_offset (Esp), | |
273 | context_offset (Ebp), | |
274 | context_offset (Esi), | |
275 | context_offset (Edi), | |
276 | context_offset (Eip), | |
277 | context_offset (EFlags), | |
278 | context_offset (SegCs), | |
279 | context_offset (SegSs), | |
280 | context_offset (SegDs), | |
281 | context_offset (SegEs), | |
282 | context_offset (SegFs), | |
283 | context_offset (SegGs), | |
284 | context_offset (FloatSave.RegisterArea[0 * 10]), | |
285 | context_offset (FloatSave.RegisterArea[1 * 10]), | |
286 | context_offset (FloatSave.RegisterArea[2 * 10]), | |
287 | context_offset (FloatSave.RegisterArea[3 * 10]), | |
288 | context_offset (FloatSave.RegisterArea[4 * 10]), | |
289 | context_offset (FloatSave.RegisterArea[5 * 10]), | |
290 | context_offset (FloatSave.RegisterArea[6 * 10]), | |
291 | context_offset (FloatSave.RegisterArea[7 * 10]), | |
292 | context_offset (FloatSave.ControlWord), | |
293 | context_offset (FloatSave.StatusWord), | |
294 | context_offset (FloatSave.TagWord), | |
295 | context_offset (FloatSave.ErrorSelector), | |
296 | context_offset (FloatSave.ErrorOffset), | |
297 | context_offset (FloatSave.DataSelector), | |
298 | context_offset (FloatSave.DataOffset), | |
299 | context_offset (FloatSave.ErrorSelector), | |
300 | /* XMM0-7 */ | |
301 | context_offset (ExtendedRegisters[10 * 16]), | |
302 | context_offset (ExtendedRegisters[11 * 16]), | |
303 | context_offset (ExtendedRegisters[12 * 16]), | |
304 | context_offset (ExtendedRegisters[13 * 16]), | |
305 | context_offset (ExtendedRegisters[14 * 16]), | |
306 | context_offset (ExtendedRegisters[15 * 16]), | |
307 | context_offset (ExtendedRegisters[16 * 16]), | |
308 | context_offset (ExtendedRegisters[17 * 16]), | |
309 | /* MXCSR */ | |
310 | context_offset (ExtendedRegisters[24]) | |
311 | }; | |
312 | ||
313 | #undef context_offset | |
314 | ||
315 | /* Clear out any old thread list and reintialize it to a pristine | |
316 | state. */ | |
317 | static void | |
318 | child_init_thread_list (void) | |
319 | { | |
320 | for_each_inferior (&all_threads, delete_thread_info); | |
321 | } | |
322 | ||
323 | static void | |
324 | do_initial_child_stuff (DWORD pid) | |
325 | { | |
326 | int i; | |
327 | ||
328 | last_sig = TARGET_SIGNAL_0; | |
329 | ||
330 | debug_registers_changed = 0; | |
331 | debug_registers_used = 0; | |
332 | for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++) | |
333 | dr[i] = 0; | |
334 | memset (¤t_event, 0, sizeof (current_event)); | |
335 | ||
336 | child_init_thread_list (); | |
337 | } | |
338 | ||
339 | /* Resume all artificially suspended threads if we are continuing | |
340 | execution. */ | |
341 | static int | |
342 | continue_one_thread (struct inferior_list_entry *this_thread, void *id_ptr) | |
343 | { | |
344 | struct thread_info *thread = (struct thread_info *) this_thread; | |
345 | int thread_id = * (int *) id_ptr; | |
346 | thread_info *th = inferior_target_data (thread); | |
347 | int i; | |
348 | ||
349 | if ((thread_id == -1 || thread_id == th->tid) | |
350 | && th->suspend_count) | |
351 | { | |
352 | for (i = 0; i < th->suspend_count; i++) | |
353 | (void) ResumeThread (th->h); | |
354 | th->suspend_count = 0; | |
355 | if (debug_registers_changed) | |
356 | { | |
357 | /* Only change the value of the debug registers. */ | |
358 | th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; | |
359 | th->context.Dr0 = dr[0]; | |
360 | th->context.Dr1 = dr[1]; | |
361 | th->context.Dr2 = dr[2]; | |
362 | th->context.Dr3 = dr[3]; | |
363 | /* th->context.Dr6 = dr[6]; | |
364 | FIXME: should we set dr6 also ?? */ | |
365 | th->context.Dr7 = dr[7]; | |
366 | SetThreadContext (th->h, &th->context); | |
367 | th->context.ContextFlags = 0; | |
368 | } | |
369 | } | |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
374 | static BOOL | |
375 | child_continue (DWORD continue_status, int thread_id) | |
376 | { | |
377 | BOOL res; | |
378 | ||
379 | res = ContinueDebugEvent (current_event.dwProcessId, | |
380 | current_event.dwThreadId, continue_status); | |
381 | continue_status = 0; | |
382 | if (res) | |
383 | find_inferior (&all_threads, continue_one_thread, &thread_id); | |
384 | ||
385 | debug_registers_changed = 0; | |
386 | return res; | |
387 | } | |
388 | ||
389 | /* Fetch register(s) from gdbserver regcache data. */ | |
390 | static void | |
391 | do_child_fetch_inferior_registers (thread_info *th, int r) | |
392 | { | |
393 | char *context_offset = ((char *) &th->context) + mappings[r]; | |
394 | long l; | |
395 | if (r == FCS_REGNUM) | |
396 | { | |
397 | l = *((long *) context_offset) & 0xffff; | |
398 | supply_register (r, (char *) &l); | |
399 | } | |
400 | else if (r == FOP_REGNUM) | |
401 | { | |
402 | l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1); | |
403 | supply_register (r, (char *) &l); | |
404 | } | |
405 | else | |
406 | supply_register (r, context_offset); | |
407 | } | |
408 | ||
409 | /* Fetch register(s) from the current thread context. */ | |
410 | static void | |
411 | child_fetch_inferior_registers (int r) | |
412 | { | |
413 | int regno; | |
414 | thread_info *th = thread_rec (current_inferior_tid (), TRUE); | |
415 | if (r == -1 || r == 0 || r > NUM_REGS) | |
416 | child_fetch_inferior_registers (NUM_REGS); | |
417 | else | |
418 | for (regno = 0; regno < r; regno++) | |
419 | do_child_fetch_inferior_registers (th, regno); | |
420 | } | |
421 | ||
422 | /* Get register from gdbserver regcache data. */ | |
423 | static void | |
424 | do_child_store_inferior_registers (thread_info *th, int r) | |
425 | { | |
426 | collect_register (r, ((char *) &th->context) + mappings[r]); | |
427 | } | |
428 | ||
429 | /* Store a new register value into the current thread context. We don't | |
430 | change the program's context until later, when we resume it. */ | |
431 | static void | |
432 | child_store_inferior_registers (int r) | |
433 | { | |
434 | int regno; | |
435 | thread_info *th = thread_rec (current_inferior_tid (), TRUE); | |
436 | if (r == -1 || r == 0 || r > NUM_REGS) | |
437 | child_store_inferior_registers (NUM_REGS); | |
438 | else | |
439 | for (regno = 0; regno < r; regno++) | |
440 | do_child_store_inferior_registers (th, regno); | |
441 | } | |
442 | ||
443 | /* Start a new process. | |
444 | PROGRAM is a path to the program to execute. | |
445 | ARGS is a standard NULL-terminated array of arguments, | |
446 | to be passed to the inferior as ``argv''. | |
447 | Returns the new PID on success, -1 on failure. Registers the new | |
448 | process with the process list. */ | |
449 | static int | |
450 | win32_create_inferior (char *program, char **program_args) | |
451 | { | |
452 | #ifndef USE_WIN32API | |
453 | char real_path[MAXPATHLEN]; | |
454 | char *orig_path, *new_path, *path_ptr; | |
455 | #endif | |
456 | char *winenv = NULL; | |
457 | STARTUPINFO si; | |
458 | PROCESS_INFORMATION pi; | |
459 | BOOL ret; | |
460 | DWORD flags; | |
461 | char *args; | |
462 | int argslen; | |
463 | int argc; | |
464 | ||
465 | if (!program) | |
466 | error ("No executable specified, specify executable to debug.\n"); | |
467 | ||
468 | memset (&si, 0, sizeof (si)); | |
469 | si.cb = sizeof (si); | |
470 | ||
471 | flags = DEBUG_PROCESS | DEBUG_ONLY_THIS_PROCESS; | |
472 | ||
473 | #ifndef USE_WIN32API | |
474 | orig_path = NULL; | |
475 | path_ptr = getenv ("PATH"); | |
476 | if (path_ptr) | |
477 | { | |
478 | orig_path = alloca (strlen (path_ptr) + 1); | |
479 | new_path = alloca (cygwin_posix_to_win32_path_list_buf_size (path_ptr)); | |
480 | strcpy (orig_path, path_ptr); | |
481 | cygwin_posix_to_win32_path_list (path_ptr, new_path); | |
482 | setenv ("PATH", new_path, 1); | |
483 | } | |
484 | cygwin_conv_to_win32_path (program, real_path); | |
485 | program = real_path; | |
486 | #endif | |
487 | ||
488 | argslen = strlen (program) + 1; | |
489 | for (argc = 1; program_args[argc]; argc++) | |
490 | argslen += strlen (program_args[argc]) + 1; | |
491 | args = alloca (argslen); | |
492 | strcpy (args, program); | |
493 | for (argc = 1; program_args[argc]; argc++) | |
494 | { | |
495 | /* FIXME: Can we do better about quoting? How does Cygwin | |
496 | handle this? */ | |
497 | strcat (args, " "); | |
498 | strcat (args, program_args[argc]); | |
499 | } | |
500 | OUTMSG2 (("Command line is %s\n", args)); | |
501 | ||
502 | flags |= CREATE_NEW_PROCESS_GROUP; | |
503 | ||
504 | ret = CreateProcess (0, args, /* command line */ | |
505 | NULL, /* Security */ | |
506 | NULL, /* thread */ | |
507 | TRUE, /* inherit handles */ | |
508 | flags, /* start flags */ | |
509 | winenv, NULL, /* current directory */ | |
510 | &si, &pi); | |
511 | ||
512 | #ifndef USE_WIN32API | |
513 | if (orig_path) | |
514 | setenv ("PATH", orig_path, 1); | |
515 | #endif | |
516 | ||
517 | if (!ret) | |
518 | { | |
519 | error ("Error creating process %s, (error %d): %s\n", args, | |
520 | (int) GetLastError (), strerror (GetLastError ())); | |
521 | } | |
522 | else | |
523 | { | |
524 | OUTMSG2 (("Process created: %s\n", (char *) args)); | |
525 | } | |
526 | ||
527 | CloseHandle (pi.hThread); | |
528 | ||
529 | current_process_handle = pi.hProcess; | |
530 | current_process_id = pi.dwProcessId; | |
531 | ||
532 | do_initial_child_stuff (current_process_id); | |
533 | ||
534 | return current_process_id; | |
535 | } | |
536 | ||
537 | /* Attach to a running process. | |
538 | PID is the process ID to attach to, specified by the user | |
539 | or a higher layer. */ | |
540 | static int | |
541 | win32_attach (unsigned long pid) | |
542 | { | |
543 | int res = 0; | |
544 | HMODULE kernel32 = LoadLibrary ("KERNEL32.DLL"); | |
545 | winapi_DebugActiveProcessStop *DebugActiveProcessStop = NULL; | |
546 | winapi_DebugSetProcessKillOnExit *DebugSetProcessKillOnExit = NULL; | |
547 | ||
548 | DebugActiveProcessStop = | |
549 | (winapi_DebugActiveProcessStop *) GetProcAddress (kernel32, | |
550 | "DebugActiveProcessStop"); | |
551 | DebugSetProcessKillOnExit = | |
552 | (winapi_DebugSetProcessKillOnExit *) GetProcAddress (kernel32, | |
553 | "DebugSetProcessKillOnExit"); | |
554 | ||
555 | res = DebugActiveProcess (pid) ? 1 : 0; | |
556 | ||
557 | if (!res) | |
558 | error ("Attach to process failed."); | |
559 | ||
560 | if (DebugSetProcessKillOnExit != NULL) | |
561 | DebugSetProcessKillOnExit (FALSE); | |
562 | ||
563 | current_process_id = pid; | |
564 | current_process_handle = OpenProcess (PROCESS_ALL_ACCESS, FALSE, pid); | |
565 | ||
566 | if (current_process_handle == NULL) | |
567 | { | |
568 | res = 0; | |
569 | if (DebugActiveProcessStop != NULL) | |
570 | DebugActiveProcessStop (current_process_id); | |
571 | } | |
572 | ||
573 | if (res) | |
574 | do_initial_child_stuff (pid); | |
575 | ||
576 | FreeLibrary (kernel32); | |
577 | ||
578 | return res; | |
579 | } | |
580 | ||
581 | /* Kill all inferiors. */ | |
582 | static void | |
583 | win32_kill (void) | |
584 | { | |
585 | TerminateProcess (current_process_handle, 0); | |
586 | for (;;) | |
587 | { | |
588 | if (!child_continue (DBG_CONTINUE, -1)) | |
589 | break; | |
590 | if (!WaitForDebugEvent (¤t_event, INFINITE)) | |
591 | break; | |
592 | if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT) | |
593 | break; | |
594 | } | |
595 | } | |
596 | ||
597 | /* Detach from all inferiors. */ | |
598 | static void | |
599 | win32_detach (void) | |
600 | { | |
601 | HMODULE kernel32 = LoadLibrary ("KERNEL32.DLL"); | |
602 | winapi_DebugActiveProcessStop *DebugActiveProcessStop = NULL; | |
603 | winapi_DebugSetProcessKillOnExit *DebugSetProcessKillOnExit = NULL; | |
604 | ||
605 | DebugActiveProcessStop = | |
606 | (winapi_DebugActiveProcessStop *) GetProcAddress (kernel32, | |
607 | "DebugActiveProcessStop"); | |
608 | DebugSetProcessKillOnExit = | |
609 | (winapi_DebugSetProcessKillOnExit *) GetProcAddress (kernel32, | |
610 | "DebugSetProcessKillOnExit"); | |
611 | ||
612 | if (DebugSetProcessKillOnExit != NULL) | |
613 | DebugSetProcessKillOnExit (FALSE); | |
614 | ||
615 | if (DebugActiveProcessStop != NULL) | |
616 | DebugActiveProcessStop (current_process_id); | |
617 | else | |
618 | win32_kill (); | |
619 | ||
620 | FreeLibrary (kernel32); | |
621 | } | |
622 | ||
623 | /* Return 1 iff the thread with thread ID TID is alive. */ | |
624 | static int | |
625 | win32_thread_alive (unsigned long tid) | |
626 | { | |
627 | int res; | |
628 | ||
629 | /* Our thread list is reliable; don't bother to poll target | |
630 | threads. */ | |
631 | if (find_inferior_id (&all_threads, tid) != NULL) | |
632 | res = 1; | |
633 | else | |
634 | res = 0; | |
635 | return res; | |
636 | } | |
637 | ||
638 | /* Resume the inferior process. RESUME_INFO describes how we want | |
639 | to resume. */ | |
640 | static void | |
641 | win32_resume (struct thread_resume *resume_info) | |
642 | { | |
643 | DWORD tid; | |
644 | enum target_signal sig; | |
645 | int step; | |
646 | thread_info *th; | |
647 | DWORD continue_status = DBG_CONTINUE; | |
648 | ||
649 | /* This handles the very limited set of resume packets that GDB can | |
650 | currently produce. */ | |
651 | ||
652 | if (resume_info[0].thread == -1) | |
653 | tid = -1; | |
654 | else if (resume_info[1].thread == -1 && !resume_info[1].leave_stopped) | |
655 | tid = -1; | |
656 | else | |
657 | /* Yes, we're ignoring resume_info[0].thread. It'd be tricky to make | |
658 | the Windows resume code do the right thing for thread switching. */ | |
659 | tid = current_event.dwThreadId; | |
660 | ||
661 | if (resume_info[0].thread != -1) | |
662 | { | |
663 | sig = resume_info[0].sig; | |
664 | step = resume_info[0].step; | |
665 | } | |
666 | else | |
667 | { | |
668 | sig = 0; | |
669 | step = 0; | |
670 | } | |
671 | ||
672 | if (sig != TARGET_SIGNAL_0) | |
673 | { | |
674 | if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT) | |
675 | { | |
676 | OUTMSG (("Cannot continue with signal %d here.\n", sig)); | |
677 | } | |
678 | else if (sig == last_sig) | |
679 | continue_status = DBG_EXCEPTION_NOT_HANDLED; | |
680 | else | |
681 | OUTMSG (("Can only continue with recieved signal %d.\n", last_sig)); | |
682 | } | |
683 | ||
684 | last_sig = TARGET_SIGNAL_0; | |
685 | ||
686 | /* Get context for the currently selected thread. */ | |
687 | th = thread_rec (current_event.dwThreadId, FALSE); | |
688 | if (th) | |
689 | { | |
690 | if (th->context.ContextFlags) | |
691 | { | |
692 | if (debug_registers_changed) | |
693 | { | |
694 | th->context.Dr0 = dr[0]; | |
695 | th->context.Dr1 = dr[1]; | |
696 | th->context.Dr2 = dr[2]; | |
697 | th->context.Dr3 = dr[3]; | |
698 | /* th->context.Dr6 = dr[6]; | |
699 | FIXME: should we set dr6 also ?? */ | |
700 | th->context.Dr7 = dr[7]; | |
701 | } | |
702 | ||
703 | /* Move register values from the inferior into the thread | |
704 | context structure. */ | |
705 | regcache_invalidate (); | |
706 | ||
707 | if (step) | |
708 | th->context.EFlags |= FLAG_TRACE_BIT; | |
709 | ||
710 | SetThreadContext (th->h, &th->context); | |
711 | th->context.ContextFlags = 0; | |
712 | } | |
713 | } | |
714 | ||
715 | /* Allow continuing with the same signal that interrupted us. | |
716 | Otherwise complain. */ | |
717 | ||
718 | child_continue (continue_status, tid); | |
719 | } | |
720 | ||
721 | static int | |
722 | handle_exception (struct target_waitstatus *ourstatus) | |
723 | { | |
724 | thread_info *th; | |
725 | DWORD code = current_event.u.Exception.ExceptionRecord.ExceptionCode; | |
726 | ||
727 | ourstatus->kind = TARGET_WAITKIND_STOPPED; | |
728 | ||
729 | /* Record the context of the current thread. */ | |
730 | th = thread_rec (current_event.dwThreadId, -1); | |
731 | ||
732 | switch (code) | |
733 | { | |
734 | case EXCEPTION_ACCESS_VIOLATION: | |
735 | OUTMSG2 (("EXCEPTION_ACCESS_VIOLATION")); | |
736 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; | |
737 | break; | |
738 | case STATUS_STACK_OVERFLOW: | |
739 | OUTMSG2 (("STATUS_STACK_OVERFLOW")); | |
740 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; | |
741 | break; | |
742 | case STATUS_FLOAT_DENORMAL_OPERAND: | |
743 | OUTMSG2 (("STATUS_FLOAT_DENORMAL_OPERAND")); | |
744 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
745 | break; | |
746 | case EXCEPTION_ARRAY_BOUNDS_EXCEEDED: | |
747 | OUTMSG2 (("EXCEPTION_ARRAY_BOUNDS_EXCEEDED")); | |
748 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
749 | break; | |
750 | case STATUS_FLOAT_INEXACT_RESULT: | |
751 | OUTMSG2 (("STATUS_FLOAT_INEXACT_RESULT")); | |
752 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
753 | break; | |
754 | case STATUS_FLOAT_INVALID_OPERATION: | |
755 | OUTMSG2 (("STATUS_FLOAT_INVALID_OPERATION")); | |
756 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
757 | break; | |
758 | case STATUS_FLOAT_OVERFLOW: | |
759 | OUTMSG2 (("STATUS_FLOAT_OVERFLOW")); | |
760 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
761 | break; | |
762 | case STATUS_FLOAT_STACK_CHECK: | |
763 | OUTMSG2 (("STATUS_FLOAT_STACK_CHECK")); | |
764 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
765 | break; | |
766 | case STATUS_FLOAT_UNDERFLOW: | |
767 | OUTMSG2 (("STATUS_FLOAT_UNDERFLOW")); | |
768 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
769 | break; | |
770 | case STATUS_FLOAT_DIVIDE_BY_ZERO: | |
771 | OUTMSG2 (("STATUS_FLOAT_DIVIDE_BY_ZERO")); | |
772 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
773 | break; | |
774 | case STATUS_INTEGER_DIVIDE_BY_ZERO: | |
775 | OUTMSG2 (("STATUS_INTEGER_DIVIDE_BY_ZERO")); | |
776 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
777 | break; | |
778 | case STATUS_INTEGER_OVERFLOW: | |
779 | OUTMSG2 (("STATUS_INTEGER_OVERFLOW")); | |
780 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
781 | break; | |
782 | case EXCEPTION_BREAKPOINT: | |
783 | OUTMSG2 (("EXCEPTION_BREAKPOINT")); | |
784 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; | |
785 | break; | |
786 | case DBG_CONTROL_C: | |
787 | OUTMSG2 (("DBG_CONTROL_C")); | |
788 | ourstatus->value.sig = TARGET_SIGNAL_INT; | |
789 | break; | |
790 | case DBG_CONTROL_BREAK: | |
791 | OUTMSG2 (("DBG_CONTROL_BREAK")); | |
792 | ourstatus->value.sig = TARGET_SIGNAL_INT; | |
793 | break; | |
794 | case EXCEPTION_SINGLE_STEP: | |
795 | OUTMSG2 (("EXCEPTION_SINGLE_STEP")); | |
796 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; | |
797 | break; | |
798 | case EXCEPTION_ILLEGAL_INSTRUCTION: | |
799 | OUTMSG2 (("EXCEPTION_ILLEGAL_INSTRUCTION")); | |
800 | ourstatus->value.sig = TARGET_SIGNAL_ILL; | |
801 | break; | |
802 | case EXCEPTION_PRIV_INSTRUCTION: | |
803 | OUTMSG2 (("EXCEPTION_PRIV_INSTRUCTION")); | |
804 | ourstatus->value.sig = TARGET_SIGNAL_ILL; | |
805 | break; | |
806 | case EXCEPTION_NONCONTINUABLE_EXCEPTION: | |
807 | OUTMSG2 (("EXCEPTION_NONCONTINUABLE_EXCEPTION")); | |
808 | ourstatus->value.sig = TARGET_SIGNAL_ILL; | |
809 | break; | |
810 | default: | |
811 | if (current_event.u.Exception.dwFirstChance) | |
812 | return 0; | |
813 | OUTMSG2 (("gdbserver: unknown target exception 0x%08lx at 0x%08lx", | |
814 | current_event.u.Exception.ExceptionRecord.ExceptionCode, | |
815 | (DWORD) current_event.u.Exception.ExceptionRecord. | |
816 | ExceptionAddress)); | |
817 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; | |
818 | break; | |
819 | } | |
820 | OUTMSG2 (("\n")); | |
821 | last_sig = ourstatus->value.sig; | |
822 | return 1; | |
823 | } | |
824 | ||
825 | /* Get the next event from the child. Return 1 if the event requires | |
826 | handling. */ | |
827 | static int | |
828 | get_child_debug_event (struct target_waitstatus *ourstatus) | |
829 | { | |
830 | BOOL debug_event; | |
831 | DWORD continue_status, event_code; | |
832 | thread_info *th = NULL; | |
833 | static thread_info dummy_thread_info; | |
834 | int retval = 0; | |
835 | ||
836 | in: | |
837 | ||
838 | last_sig = TARGET_SIGNAL_0; | |
839 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
840 | ||
841 | if (!(debug_event = WaitForDebugEvent (¤t_event, 1000))) | |
842 | goto out; | |
843 | ||
844 | current_inferior = | |
845 | (struct thread_info *) find_inferior_id (&all_threads, | |
846 | current_event.dwThreadId); | |
847 | ||
848 | continue_status = DBG_CONTINUE; | |
849 | event_code = current_event.dwDebugEventCode; | |
850 | ||
851 | switch (event_code) | |
852 | { | |
853 | case CREATE_THREAD_DEBUG_EVENT: | |
854 | OUTMSG2 (("gdbserver: kernel event CREATE_THREAD_DEBUG_EVENT " | |
855 | "for pid=%d tid=%x)\n", | |
856 | (unsigned) current_event.dwProcessId, | |
857 | (unsigned) current_event.dwThreadId)); | |
858 | ||
859 | /* Record the existence of this thread. */ | |
860 | th = child_add_thread (current_event.dwThreadId, | |
861 | current_event.u.CreateThread.hThread); | |
862 | ||
863 | retval = current_event.dwThreadId; | |
864 | break; | |
865 | ||
866 | case EXIT_THREAD_DEBUG_EVENT: | |
867 | OUTMSG2 (("gdbserver: kernel event EXIT_THREAD_DEBUG_EVENT " | |
868 | "for pid=%d tid=%x\n", | |
869 | (unsigned) current_event.dwProcessId, | |
870 | (unsigned) current_event.dwThreadId)); | |
871 | child_delete_thread (current_event.dwThreadId); | |
872 | th = &dummy_thread_info; | |
873 | break; | |
874 | ||
875 | case CREATE_PROCESS_DEBUG_EVENT: | |
876 | OUTMSG2 (("gdbserver: kernel event CREATE_PROCESS_DEBUG_EVENT " | |
877 | "for pid=%d tid=%x\n", | |
878 | (unsigned) current_event.dwProcessId, | |
879 | (unsigned) current_event.dwThreadId)); | |
880 | CloseHandle (current_event.u.CreateProcessInfo.hFile); | |
881 | ||
882 | current_process_handle = current_event.u.CreateProcessInfo.hProcess; | |
883 | main_thread_id = current_event.dwThreadId; | |
884 | ||
885 | ourstatus->kind = TARGET_WAITKIND_EXECD; | |
886 | ourstatus->value.execd_pathname = "Main executable"; | |
887 | ||
888 | /* Add the main thread. */ | |
889 | th = | |
890 | child_add_thread (main_thread_id, | |
891 | current_event.u.CreateProcessInfo.hThread); | |
892 | ||
893 | retval = ourstatus->value.related_pid = current_event.dwThreadId; | |
894 | break; | |
895 | ||
896 | case EXIT_PROCESS_DEBUG_EVENT: | |
897 | OUTMSG2 (("gdbserver: kernel event EXIT_PROCESS_DEBUG_EVENT " | |
898 | "for pid=%d tid=%x\n", | |
899 | (unsigned) current_event.dwProcessId, | |
900 | (unsigned) current_event.dwThreadId)); | |
901 | ourstatus->kind = TARGET_WAITKIND_EXITED; | |
902 | ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode; | |
903 | CloseHandle (current_process_handle); | |
904 | retval = main_thread_id; | |
905 | break; | |
906 | ||
907 | case LOAD_DLL_DEBUG_EVENT: | |
908 | OUTMSG2 (("gdbserver: kernel event LOAD_DLL_DEBUG_EVENT " | |
909 | "for pid=%d tid=%x\n", | |
910 | (unsigned) current_event.dwProcessId, | |
911 | (unsigned) current_event.dwThreadId)); | |
912 | CloseHandle (current_event.u.LoadDll.hFile); | |
913 | ||
914 | ourstatus->kind = TARGET_WAITKIND_LOADED; | |
915 | ourstatus->value.integer = 0; | |
916 | retval = main_thread_id; | |
917 | break; | |
918 | ||
919 | case UNLOAD_DLL_DEBUG_EVENT: | |
920 | OUTMSG2 (("gdbserver: kernel event UNLOAD_DLL_DEBUG_EVENT " | |
921 | "for pid=%d tid=%x\n", | |
922 | (unsigned) current_event.dwProcessId, | |
923 | (unsigned) current_event.dwThreadId)); | |
924 | break; | |
925 | ||
926 | case EXCEPTION_DEBUG_EVENT: | |
927 | OUTMSG2 (("gdbserver: kernel event EXCEPTION_DEBUG_EVENT " | |
928 | "for pid=%d tid=%x\n", | |
929 | (unsigned) current_event.dwProcessId, | |
930 | (unsigned) current_event.dwThreadId)); | |
931 | retval = handle_exception (ourstatus); | |
932 | break; | |
933 | ||
934 | case OUTPUT_DEBUG_STRING_EVENT: | |
935 | /* A message from the kernel (or Cygwin). */ | |
936 | OUTMSG2 (("gdbserver: kernel event OUTPUT_DEBUG_STRING_EVENT " | |
937 | "for pid=%d tid=%x\n", | |
938 | (unsigned) current_event.dwProcessId, | |
939 | (unsigned) current_event.dwThreadId)); | |
940 | break; | |
941 | ||
942 | default: | |
943 | OUTMSG2 (("gdbserver: kernel event unknown " | |
944 | "for pid=%d tid=%x code=%ld\n", | |
945 | (unsigned) current_event.dwProcessId, | |
946 | (unsigned) current_event.dwThreadId, | |
947 | current_event.dwDebugEventCode)); | |
948 | break; | |
949 | } | |
950 | ||
951 | current_inferior = | |
952 | (struct thread_info *) find_inferior_id (&all_threads, | |
953 | current_event.dwThreadId); | |
954 | ||
955 | if (!retval || (event_code != EXCEPTION_DEBUG_EVENT && event_code != EXIT_PROCESS_DEBUG_EVENT)) | |
956 | { | |
957 | child_continue (continue_status, -1); | |
958 | goto in; | |
959 | } | |
960 | ||
961 | if (th == NULL) | |
962 | thread_rec (current_event.dwThreadId, TRUE); | |
963 | ||
964 | out: | |
965 | return retval; | |
966 | } | |
967 | ||
968 | /* Wait for the inferior process to change state. | |
969 | STATUS will be filled in with a response code to send to GDB. | |
970 | Returns the signal which caused the process to stop. */ | |
971 | static unsigned char | |
972 | win32_wait (char *status) | |
973 | { | |
974 | struct target_waitstatus our_status; | |
975 | ||
976 | *status = 'T'; | |
977 | ||
978 | while (1) | |
979 | { | |
980 | get_child_debug_event (&our_status); | |
981 | ||
982 | if (our_status.kind == TARGET_WAITKIND_EXITED) | |
983 | { | |
984 | OUTMSG2 (("Child exited with retcode = %x\n", | |
985 | our_status.value.integer)); | |
986 | ||
987 | *status = 'W'; | |
988 | ||
989 | child_fetch_inferior_registers (-1); | |
990 | ||
991 | return our_status.value.integer; | |
992 | } | |
993 | else if (our_status.kind == TARGET_WAITKIND_STOPPED) | |
994 | { | |
995 | OUTMSG2 (("Child Stopped with signal = %x \n", | |
996 | WSTOPSIG (our_status.value.sig))); | |
997 | ||
998 | *status = 'T'; | |
999 | ||
1000 | child_fetch_inferior_registers (-1); | |
1001 | ||
1002 | return our_status.value.sig; | |
1003 | } | |
1004 | else | |
1005 | OUTMSG (("Ignoring unknown internal event, %d\n", our_status.kind)); | |
1006 | ||
1007 | { | |
1008 | struct thread_resume resume; | |
1009 | resume.thread = -1; | |
1010 | resume.step = 0; | |
1011 | resume.sig = 0; | |
1012 | resume.leave_stopped = 0; | |
1013 | win32_resume (&resume); | |
1014 | } | |
1015 | } | |
1016 | } | |
1017 | ||
1018 | /* Fetch registers from the inferior process. | |
1019 | If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO. */ | |
1020 | static void | |
1021 | win32_fetch_inferior_registers (int regno) | |
1022 | { | |
1023 | child_fetch_inferior_registers (regno); | |
1024 | } | |
1025 | ||
1026 | /* Store registers to the inferior process. | |
1027 | If REGNO is -1, store all registers; otherwise, store at least REGNO. */ | |
1028 | static void | |
1029 | win32_store_inferior_registers (int regno) | |
1030 | { | |
1031 | child_store_inferior_registers (regno); | |
1032 | } | |
1033 | ||
1034 | /* Read memory from the inferior process. This should generally be | |
1035 | called through read_inferior_memory, which handles breakpoint shadowing. | |
1036 | Read LEN bytes at MEMADDR into a buffer at MYADDR. */ | |
1037 | static int | |
1038 | win32_read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) | |
1039 | { | |
1040 | return child_xfer_memory (memaddr, myaddr, len, 0, 0) != len; | |
1041 | } | |
1042 | ||
1043 | /* Write memory to the inferior process. This should generally be | |
1044 | called through write_inferior_memory, which handles breakpoint shadowing. | |
1045 | Write LEN bytes from the buffer at MYADDR to MEMADDR. | |
1046 | Returns 0 on success and errno on failure. */ | |
1047 | static int | |
1048 | win32_write_inferior_memory (CORE_ADDR memaddr, const unsigned char *myaddr, | |
1049 | int len) | |
1050 | { | |
1051 | return child_xfer_memory (memaddr, (char *) myaddr, len, 1, 0) != len; | |
1052 | } | |
1053 | ||
1054 | static struct target_ops win32_target_ops = { | |
1055 | win32_create_inferior, | |
1056 | win32_attach, | |
1057 | win32_kill, | |
1058 | win32_detach, | |
1059 | win32_thread_alive, | |
1060 | win32_resume, | |
1061 | win32_wait, | |
1062 | win32_fetch_inferior_registers, | |
1063 | win32_store_inferior_registers, | |
1064 | win32_read_inferior_memory, | |
1065 | win32_write_inferior_memory, | |
1066 | 0, | |
1067 | 0 | |
1068 | }; | |
1069 | ||
1070 | /* Initialize the Win32 backend. */ | |
1071 | void | |
1072 | initialize_low (void) | |
1073 | { | |
1074 | set_target_ops (&win32_target_ops); | |
1075 | ||
1076 | init_registers (); | |
1077 | } |