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1 | /* Target-vector operations for controlling win32 child processes, for GDB. | |
2 | ||
3 | Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free | |
4 | Software Foundation, Inc. | |
5 | ||
6 | Contributed by Cygnus Solutions, A Red Hat Company. | |
7 | ||
8 | This file is part of GDB. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without eve nthe implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | Boston, MA 02111-1307, USA. */ | |
24 | ||
25 | /* Originally by Steve Chamberlain, sac@cygnus.com */ | |
26 | ||
27 | /* We assume we're being built with and will be used for cygwin. */ | |
28 | ||
29 | #include "defs.h" | |
30 | #include "tm.h" /* required for SSE registers */ | |
31 | #include "frame.h" /* required by inferior.h */ | |
32 | #include "inferior.h" | |
33 | #include "target.h" | |
34 | #include "gdbcore.h" | |
35 | #include "command.h" | |
36 | #include "completer.h" | |
37 | #include "regcache.h" | |
38 | #include "top.h" | |
39 | #include "i386-tdep.h" | |
40 | #include <signal.h> | |
41 | #include <sys/types.h> | |
42 | #include <fcntl.h> | |
43 | #include <stdlib.h> | |
44 | #include <windows.h> | |
45 | #include <imagehlp.h> | |
46 | #include <sys/cygwin.h> | |
47 | ||
48 | #include "buildsym.h" | |
49 | #include "symfile.h" | |
50 | #include "objfiles.h" | |
51 | #include "gdb_string.h" | |
52 | #include "gdbthread.h" | |
53 | #include "gdbcmd.h" | |
54 | #include <sys/param.h> | |
55 | #include <unistd.h> | |
56 | ||
57 | /* The ui's event loop. */ | |
58 | extern int (*ui_loop_hook) (int signo); | |
59 | ||
60 | /* If we're not using the old Cygwin header file set, define the | |
61 | following which never should have been in the generic Win32 API | |
62 | headers in the first place since they were our own invention... */ | |
63 | #ifndef _GNU_H_WINDOWS_H | |
64 | enum | |
65 | { | |
66 | FLAG_TRACE_BIT = 0x100, | |
67 | CONTEXT_DEBUGGER = (CONTEXT_FULL | CONTEXT_FLOATING_POINT) | |
68 | }; | |
69 | #endif | |
70 | #include <sys/procfs.h> | |
71 | #include <psapi.h> | |
72 | ||
73 | #ifdef HAVE_SSE_REGS | |
74 | #define CONTEXT_DEBUGGER_DR CONTEXT_DEBUGGER | CONTEXT_DEBUG_REGISTERS \ | |
75 | | CONTEXT_EXTENDED_REGISTERS | |
76 | #else | |
77 | #define CONTEXT_DEBUGGER_DR CONTEXT_DEBUGGER | CONTEXT_DEBUG_REGISTERS | |
78 | #endif | |
79 | ||
80 | static unsigned dr[8]; | |
81 | static int debug_registers_changed = 0; | |
82 | static int debug_registers_used = 0; | |
83 | ||
84 | /* The string sent by cygwin when it processes a signal. | |
85 | FIXME: This should be in a cygwin include file. */ | |
86 | #define CYGWIN_SIGNAL_STRING "cygwin: signal" | |
87 | ||
88 | #define CHECK(x) check (x, __FILE__,__LINE__) | |
89 | #define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x | |
90 | #define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x | |
91 | #define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x | |
92 | #define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x | |
93 | ||
94 | /* Forward declaration */ | |
95 | extern struct target_ops child_ops; | |
96 | ||
97 | static void child_stop (void); | |
98 | static int win32_child_thread_alive (ptid_t); | |
99 | void child_kill_inferior (void); | |
100 | ||
101 | static enum target_signal last_sig = TARGET_SIGNAL_0; | |
102 | /* Set if a signal was received from the debugged process */ | |
103 | ||
104 | /* Thread information structure used to track information that is | |
105 | not available in gdb's thread structure. */ | |
106 | typedef struct thread_info_struct | |
107 | { | |
108 | struct thread_info_struct *next; | |
109 | DWORD id; | |
110 | HANDLE h; | |
111 | char *name; | |
112 | int suspend_count; | |
113 | CONTEXT context; | |
114 | STACKFRAME sf; | |
115 | } | |
116 | thread_info; | |
117 | ||
118 | static thread_info thread_head; | |
119 | ||
120 | /* The process and thread handles for the above context. */ | |
121 | ||
122 | static DEBUG_EVENT current_event; /* The current debug event from | |
123 | WaitForDebugEvent */ | |
124 | static HANDLE current_process_handle; /* Currently executing process */ | |
125 | static thread_info *current_thread; /* Info on currently selected thread */ | |
126 | static DWORD main_thread_id; /* Thread ID of the main thread */ | |
127 | ||
128 | /* Counts of things. */ | |
129 | static int exception_count = 0; | |
130 | static int event_count = 0; | |
131 | static int saw_create; | |
132 | ||
133 | /* User options. */ | |
134 | static int new_console = 0; | |
135 | static int new_group = 1; | |
136 | static int debug_exec = 0; /* show execution */ | |
137 | static int debug_events = 0; /* show events from kernel */ | |
138 | static int debug_memory = 0; /* show target memory accesses */ | |
139 | static int debug_exceptions = 0; /* show target exceptions */ | |
140 | static int useshell = 0; /* use shell for subprocesses */ | |
141 | ||
142 | /* Path to shell */ | |
143 | static char shell[MAX_PATH + 1]; | |
144 | ||
145 | /* This vector maps GDB's idea of a register's number into an address | |
146 | in the win32 exception context vector. | |
147 | ||
148 | It also contains the bit mask needed to load the register in question. | |
149 | ||
150 | One day we could read a reg, we could inspect the context we | |
151 | already have loaded, if it doesn't have the bit set that we need, | |
152 | we read that set of registers in using GetThreadContext. If the | |
153 | context already contains what we need, we just unpack it. Then to | |
154 | write a register, first we have to ensure that the context contains | |
155 | the other regs of the group, and then we copy the info in and set | |
156 | out bit. */ | |
157 | ||
158 | #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x)) | |
159 | static const int mappings[] = | |
160 | { | |
161 | context_offset (Eax), | |
162 | context_offset (Ecx), | |
163 | context_offset (Edx), | |
164 | context_offset (Ebx), | |
165 | context_offset (Esp), | |
166 | context_offset (Ebp), | |
167 | context_offset (Esi), | |
168 | context_offset (Edi), | |
169 | context_offset (Eip), | |
170 | context_offset (EFlags), | |
171 | context_offset (SegCs), | |
172 | context_offset (SegSs), | |
173 | context_offset (SegDs), | |
174 | context_offset (SegEs), | |
175 | context_offset (SegFs), | |
176 | context_offset (SegGs), | |
177 | context_offset (FloatSave.RegisterArea[0 * 10]), | |
178 | context_offset (FloatSave.RegisterArea[1 * 10]), | |
179 | context_offset (FloatSave.RegisterArea[2 * 10]), | |
180 | context_offset (FloatSave.RegisterArea[3 * 10]), | |
181 | context_offset (FloatSave.RegisterArea[4 * 10]), | |
182 | context_offset (FloatSave.RegisterArea[5 * 10]), | |
183 | context_offset (FloatSave.RegisterArea[6 * 10]), | |
184 | context_offset (FloatSave.RegisterArea[7 * 10]), | |
185 | context_offset (FloatSave.ControlWord), | |
186 | context_offset (FloatSave.StatusWord), | |
187 | context_offset (FloatSave.TagWord), | |
188 | context_offset (FloatSave.ErrorSelector), | |
189 | context_offset (FloatSave.ErrorOffset), | |
190 | context_offset (FloatSave.DataSelector), | |
191 | context_offset (FloatSave.DataOffset), | |
192 | context_offset (FloatSave.ErrorSelector) | |
193 | #ifdef HAVE_SSE_REGS | |
194 | /* XMM0-7 */ , | |
195 | context_offset (ExtendedRegisters[10*16]), | |
196 | context_offset (ExtendedRegisters[11*16]), | |
197 | context_offset (ExtendedRegisters[12*16]), | |
198 | context_offset (ExtendedRegisters[13*16]), | |
199 | context_offset (ExtendedRegisters[14*16]), | |
200 | context_offset (ExtendedRegisters[15*16]), | |
201 | context_offset (ExtendedRegisters[16*16]), | |
202 | context_offset (ExtendedRegisters[17*16]), | |
203 | /* MXCSR */ | |
204 | context_offset (ExtendedRegisters[24]) | |
205 | #endif | |
206 | }; | |
207 | ||
208 | #undef context_offset | |
209 | ||
210 | /* This vector maps the target's idea of an exception (extracted | |
211 | from the DEBUG_EVENT structure) to GDB's idea. */ | |
212 | ||
213 | struct xlate_exception | |
214 | { | |
215 | int them; | |
216 | enum target_signal us; | |
217 | }; | |
218 | ||
219 | static const struct xlate_exception | |
220 | xlate[] = | |
221 | { | |
222 | {EXCEPTION_ACCESS_VIOLATION, TARGET_SIGNAL_SEGV}, | |
223 | {STATUS_STACK_OVERFLOW, TARGET_SIGNAL_SEGV}, | |
224 | {EXCEPTION_BREAKPOINT, TARGET_SIGNAL_TRAP}, | |
225 | {DBG_CONTROL_C, TARGET_SIGNAL_INT}, | |
226 | {EXCEPTION_SINGLE_STEP, TARGET_SIGNAL_TRAP}, | |
227 | {STATUS_FLOAT_DIVIDE_BY_ZERO, TARGET_SIGNAL_FPE}, | |
228 | {-1, -1}}; | |
229 | ||
230 | static void | |
231 | check (BOOL ok, const char *file, int line) | |
232 | { | |
233 | if (!ok) | |
234 | printf_filtered ("error return %s:%d was %lu\n", file, line, | |
235 | GetLastError ()); | |
236 | } | |
237 | ||
238 | ||
239 | /* Find a thread record given a thread id. | |
240 | If get_context then also retrieve the context for this | |
241 | thread. */ | |
242 | static thread_info * | |
243 | thread_rec (DWORD id, int get_context) | |
244 | { | |
245 | thread_info *th; | |
246 | ||
247 | for (th = &thread_head; (th = th->next) != NULL;) | |
248 | if (th->id == id) | |
249 | { | |
250 | if (!th->suspend_count && get_context) | |
251 | { | |
252 | if (get_context > 0 && id != current_event.dwThreadId) | |
253 | th->suspend_count = SuspendThread (th->h) + 1; | |
254 | else if (get_context < 0) | |
255 | th->suspend_count = -1; | |
256 | ||
257 | th->context.ContextFlags = CONTEXT_DEBUGGER_DR; | |
258 | GetThreadContext (th->h, &th->context); | |
259 | if (id == current_event.dwThreadId) | |
260 | { | |
261 | /* Copy dr values from that thread. */ | |
262 | dr[0] = th->context.Dr0; | |
263 | dr[1] = th->context.Dr1; | |
264 | dr[2] = th->context.Dr2; | |
265 | dr[3] = th->context.Dr3; | |
266 | dr[6] = th->context.Dr6; | |
267 | dr[7] = th->context.Dr7; | |
268 | } | |
269 | } | |
270 | return th; | |
271 | } | |
272 | ||
273 | return NULL; | |
274 | } | |
275 | ||
276 | /* Add a thread to the thread list */ | |
277 | static thread_info * | |
278 | child_add_thread (DWORD id, HANDLE h) | |
279 | { | |
280 | thread_info *th; | |
281 | ||
282 | if ((th = thread_rec (id, FALSE))) | |
283 | return th; | |
284 | ||
285 | th = (thread_info *) xmalloc (sizeof (*th)); | |
286 | memset (th, 0, sizeof (*th)); | |
287 | th->id = id; | |
288 | th->h = h; | |
289 | th->next = thread_head.next; | |
290 | thread_head.next = th; | |
291 | add_thread (pid_to_ptid (id)); | |
292 | /* Set the debug registers for the new thread in they are used. */ | |
293 | if (debug_registers_used) | |
294 | { | |
295 | /* Only change the value of the debug registers. */ | |
296 | th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; | |
297 | CHECK (GetThreadContext (th->h, &th->context)); | |
298 | th->context.Dr0 = dr[0]; | |
299 | th->context.Dr1 = dr[1]; | |
300 | th->context.Dr2 = dr[2]; | |
301 | th->context.Dr3 = dr[3]; | |
302 | /* th->context.Dr6 = dr[6]; | |
303 | FIXME: should we set dr6 also ?? */ | |
304 | th->context.Dr7 = dr[7]; | |
305 | CHECK (SetThreadContext (th->h, &th->context)); | |
306 | th->context.ContextFlags = 0; | |
307 | } | |
308 | return th; | |
309 | } | |
310 | ||
311 | /* Clear out any old thread list and reintialize it to a | |
312 | pristine state. */ | |
313 | static void | |
314 | child_init_thread_list (void) | |
315 | { | |
316 | thread_info *th = &thread_head; | |
317 | ||
318 | DEBUG_EVENTS (("gdb: child_init_thread_list\n")); | |
319 | init_thread_list (); | |
320 | while (th->next != NULL) | |
321 | { | |
322 | thread_info *here = th->next; | |
323 | th->next = here->next; | |
324 | (void) CloseHandle (here->h); | |
325 | xfree (here); | |
326 | } | |
327 | } | |
328 | ||
329 | /* Delete a thread from the list of threads */ | |
330 | static void | |
331 | child_delete_thread (DWORD id) | |
332 | { | |
333 | thread_info *th; | |
334 | ||
335 | if (info_verbose) | |
336 | printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (pid_to_ptid (id))); | |
337 | delete_thread (pid_to_ptid (id)); | |
338 | ||
339 | for (th = &thread_head; | |
340 | th->next != NULL && th->next->id != id; | |
341 | th = th->next) | |
342 | continue; | |
343 | ||
344 | if (th->next != NULL) | |
345 | { | |
346 | thread_info *here = th->next; | |
347 | th->next = here->next; | |
348 | CloseHandle (here->h); | |
349 | xfree (here); | |
350 | } | |
351 | } | |
352 | ||
353 | static void | |
354 | do_child_fetch_inferior_registers (int r) | |
355 | { | |
356 | char *context_offset = ((char *) ¤t_thread->context) + mappings[r]; | |
357 | long l; | |
358 | if (r == FCS_REGNUM) | |
359 | { | |
360 | l = *((long *) context_offset) & 0xffff; | |
361 | supply_register (r, (char *) &l); | |
362 | } | |
363 | else if (r == FOP_REGNUM) | |
364 | { | |
365 | l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1); | |
366 | supply_register (r, (char *) &l); | |
367 | } | |
368 | else if (r >= 0) | |
369 | supply_register (r, context_offset); | |
370 | else | |
371 | { | |
372 | for (r = 0; r < NUM_REGS; r++) | |
373 | do_child_fetch_inferior_registers (r); | |
374 | } | |
375 | } | |
376 | ||
377 | static void | |
378 | child_fetch_inferior_registers (int r) | |
379 | { | |
380 | current_thread = thread_rec (PIDGET (inferior_ptid), TRUE); | |
381 | do_child_fetch_inferior_registers (r); | |
382 | } | |
383 | ||
384 | static void | |
385 | do_child_store_inferior_registers (int r) | |
386 | { | |
387 | if (r >= 0) | |
388 | read_register_gen (r, ((char *) ¤t_thread->context) + mappings[r]); | |
389 | else | |
390 | { | |
391 | for (r = 0; r < NUM_REGS; r++) | |
392 | do_child_store_inferior_registers (r); | |
393 | } | |
394 | } | |
395 | ||
396 | /* Store a new register value into the current thread context */ | |
397 | static void | |
398 | child_store_inferior_registers (int r) | |
399 | { | |
400 | current_thread = thread_rec (PIDGET (inferior_ptid), TRUE); | |
401 | do_child_store_inferior_registers (r); | |
402 | } | |
403 | ||
404 | static int psapi_loaded = 0; | |
405 | static HMODULE psapi_module_handle = NULL; | |
406 | static BOOL WINAPI (*psapi_EnumProcessModules) (HANDLE, HMODULE *, DWORD, LPDWORD) = NULL; | |
407 | static BOOL WINAPI (*psapi_GetModuleInformation) (HANDLE, HMODULE, LPMODULEINFO, DWORD) = NULL; | |
408 | static DWORD WINAPI (*psapi_GetModuleFileNameExA) (HANDLE, HMODULE, LPSTR, DWORD) = NULL; | |
409 | ||
410 | int | |
411 | psapi_get_dll_name (DWORD BaseAddress, char *dll_name_ret) | |
412 | { | |
413 | DWORD len; | |
414 | MODULEINFO mi; | |
415 | int i; | |
416 | HMODULE dh_buf[1]; | |
417 | HMODULE *DllHandle = dh_buf; | |
418 | DWORD cbNeeded; | |
419 | BOOL ok; | |
420 | ||
421 | if (!psapi_loaded || | |
422 | psapi_EnumProcessModules == NULL || | |
423 | psapi_GetModuleInformation == NULL || | |
424 | psapi_GetModuleFileNameExA == NULL) | |
425 | { | |
426 | if (psapi_loaded) | |
427 | goto failed; | |
428 | psapi_loaded = 1; | |
429 | psapi_module_handle = LoadLibrary ("psapi.dll"); | |
430 | if (!psapi_module_handle) | |
431 | { | |
432 | /* printf_unfiltered ("error loading psapi.dll: %u", GetLastError ()); */ | |
433 | goto failed; | |
434 | } | |
435 | psapi_EnumProcessModules = GetProcAddress (psapi_module_handle, "EnumProcessModules"); | |
436 | psapi_GetModuleInformation = GetProcAddress (psapi_module_handle, "GetModuleInformation"); | |
437 | psapi_GetModuleFileNameExA = (void *) GetProcAddress (psapi_module_handle, | |
438 | "GetModuleFileNameExA"); | |
439 | if (psapi_EnumProcessModules == NULL || | |
440 | psapi_GetModuleInformation == NULL || | |
441 | psapi_GetModuleFileNameExA == NULL) | |
442 | goto failed; | |
443 | } | |
444 | ||
445 | cbNeeded = 0; | |
446 | ok = (*psapi_EnumProcessModules) (current_process_handle, | |
447 | DllHandle, | |
448 | sizeof (HMODULE), | |
449 | &cbNeeded); | |
450 | ||
451 | if (!ok || !cbNeeded) | |
452 | goto failed; | |
453 | ||
454 | DllHandle = (HMODULE *) alloca (cbNeeded); | |
455 | if (!DllHandle) | |
456 | goto failed; | |
457 | ||
458 | ok = (*psapi_EnumProcessModules) (current_process_handle, | |
459 | DllHandle, | |
460 | cbNeeded, | |
461 | &cbNeeded); | |
462 | if (!ok) | |
463 | goto failed; | |
464 | ||
465 | for (i = 0; i < (int) (cbNeeded / sizeof (HMODULE)); i++) | |
466 | { | |
467 | if (!(*psapi_GetModuleInformation) (current_process_handle, | |
468 | DllHandle[i], | |
469 | &mi, | |
470 | sizeof (mi))) | |
471 | error ("Can't get module info"); | |
472 | ||
473 | len = (*psapi_GetModuleFileNameExA) (current_process_handle, | |
474 | DllHandle[i], | |
475 | dll_name_ret, | |
476 | MAX_PATH); | |
477 | if (len == 0) | |
478 | error ("Error getting dll name: %u\n", GetLastError ()); | |
479 | ||
480 | if ((DWORD) (mi.lpBaseOfDll) == BaseAddress) | |
481 | return 1; | |
482 | } | |
483 | ||
484 | failed: | |
485 | dll_name_ret[0] = '\0'; | |
486 | return 0; | |
487 | } | |
488 | ||
489 | /* Encapsulate the information required in a call to | |
490 | symbol_file_add_args */ | |
491 | struct safe_symbol_file_add_args | |
492 | { | |
493 | char *name; | |
494 | int from_tty; | |
495 | struct section_addr_info *addrs; | |
496 | int mainline; | |
497 | int flags; | |
498 | struct ui_file *err, *out; | |
499 | struct objfile *ret; | |
500 | }; | |
501 | ||
502 | /* Maintain a linked list of "so" information. */ | |
503 | struct so_stuff | |
504 | { | |
505 | struct so_stuff *next; | |
506 | DWORD load_addr; | |
507 | int loaded; | |
508 | struct objfile *objfile; | |
509 | char name[1]; | |
510 | } solib_start, *solib_end; | |
511 | ||
512 | /* Call symbol_file_add with stderr redirected. We don't care if there | |
513 | are errors. */ | |
514 | static int | |
515 | safe_symbol_file_add_stub (void *argv) | |
516 | { | |
517 | #define p ((struct safe_symbol_file_add_args *)argv) | |
518 | struct so_stuff *so = &solib_start; | |
519 | ||
520 | while ((so = so->next)) | |
521 | if (so->loaded && strcasecmp (so->name, p->name) == 0) | |
522 | return 0; | |
523 | p->ret = symbol_file_add (p->name, p->from_tty, p->addrs, p->mainline, p->flags); | |
524 | return !!p->ret; | |
525 | #undef p | |
526 | } | |
527 | ||
528 | /* Restore gdb's stderr after calling symbol_file_add */ | |
529 | static void | |
530 | safe_symbol_file_add_cleanup (void *p) | |
531 | { | |
532 | #define sp ((struct safe_symbol_file_add_args *)p) | |
533 | gdb_flush (gdb_stderr); | |
534 | gdb_flush (gdb_stdout); | |
535 | ui_file_delete (gdb_stderr); | |
536 | ui_file_delete (gdb_stdout); | |
537 | gdb_stderr = sp->err; | |
538 | gdb_stdout = sp->out; | |
539 | #undef sp | |
540 | } | |
541 | ||
542 | /* symbol_file_add wrapper that prevents errors from being displayed. */ | |
543 | static struct objfile * | |
544 | safe_symbol_file_add (char *name, int from_tty, | |
545 | struct section_addr_info *addrs, | |
546 | int mainline, int flags) | |
547 | { | |
548 | struct safe_symbol_file_add_args p; | |
549 | struct cleanup *cleanup; | |
550 | ||
551 | cleanup = make_cleanup (safe_symbol_file_add_cleanup, &p); | |
552 | ||
553 | p.err = gdb_stderr; | |
554 | p.out = gdb_stdout; | |
555 | gdb_flush (gdb_stderr); | |
556 | gdb_flush (gdb_stdout); | |
557 | gdb_stderr = ui_file_new (); | |
558 | gdb_stdout = ui_file_new (); | |
559 | p.name = name; | |
560 | p.from_tty = from_tty; | |
561 | p.addrs = addrs; | |
562 | p.mainline = mainline; | |
563 | p.flags = flags; | |
564 | catch_errors (safe_symbol_file_add_stub, &p, "", RETURN_MASK_ERROR); | |
565 | ||
566 | do_cleanups (cleanup); | |
567 | return p.ret; | |
568 | } | |
569 | ||
570 | /* Remember the maximum DLL length for printing in info dll command. */ | |
571 | int max_dll_name_len; | |
572 | ||
573 | static void | |
574 | register_loaded_dll (const char *name, DWORD load_addr) | |
575 | { | |
576 | struct so_stuff *so; | |
577 | char ppath[MAX_PATH + 1]; | |
578 | char buf[MAX_PATH + 1]; | |
579 | char cwd[MAX_PATH + 1]; | |
580 | char *p; | |
581 | WIN32_FIND_DATA w32_fd; | |
582 | HANDLE h = FindFirstFile(name, &w32_fd); | |
583 | size_t len; | |
584 | ||
585 | if (h != INVALID_HANDLE_VALUE) | |
586 | { | |
587 | FindClose (h); | |
588 | strcpy (buf, name); | |
589 | if (GetCurrentDirectory (MAX_PATH + 1, cwd)) | |
590 | { | |
591 | p = strrchr (buf, '\\'); | |
592 | if (p) | |
593 | p[1] = '\0'; | |
594 | SetCurrentDirectory (buf); | |
595 | GetFullPathName (w32_fd.cFileName, MAX_PATH, buf, &p); | |
596 | SetCurrentDirectory (cwd); | |
597 | } | |
598 | } | |
599 | ||
600 | cygwin_conv_to_posix_path (buf, ppath); | |
601 | so = (struct so_stuff *) xmalloc (sizeof (struct so_stuff) + strlen (ppath) + 8 + 1); | |
602 | so->loaded = 0; | |
603 | so->load_addr = load_addr; | |
604 | so->next = NULL; | |
605 | so->objfile = NULL; | |
606 | strcpy (so->name, ppath); | |
607 | ||
608 | solib_end->next = so; | |
609 | solib_end = so; | |
610 | len = strlen (ppath); | |
611 | if (len > max_dll_name_len) | |
612 | max_dll_name_len = len; | |
613 | } | |
614 | ||
615 | char * | |
616 | get_image_name (HANDLE h, void *address, int unicode) | |
617 | { | |
618 | static char buf[(2 * MAX_PATH) + 1]; | |
619 | DWORD size = unicode ? sizeof (WCHAR) : sizeof (char); | |
620 | char *address_ptr; | |
621 | int len = 0; | |
622 | char b[2]; | |
623 | DWORD done; | |
624 | ||
625 | /* Attempt to read the name of the dll that was detected. | |
626 | This is documented to work only when actively debugging | |
627 | a program. It will not work for attached processes. */ | |
628 | if (address == NULL) | |
629 | return NULL; | |
630 | ||
631 | ReadProcessMemory (h, address, &address_ptr, sizeof (address_ptr), &done); | |
632 | ||
633 | /* See if we could read the address of a string, and that the | |
634 | address isn't null. */ | |
635 | ||
636 | if (done != sizeof (address_ptr) || !address_ptr) | |
637 | return NULL; | |
638 | ||
639 | /* Find the length of the string */ | |
640 | do | |
641 | { | |
642 | ReadProcessMemory (h, address_ptr + len * size, &b, size, &done); | |
643 | len++; | |
644 | } | |
645 | while ((b[0] != 0 || b[size - 1] != 0) && done == size); | |
646 | ||
647 | if (!unicode) | |
648 | ReadProcessMemory (h, address_ptr, buf, len, &done); | |
649 | else | |
650 | { | |
651 | WCHAR *unicode_address = (WCHAR *) alloca (len * sizeof (WCHAR)); | |
652 | ReadProcessMemory (h, address_ptr, unicode_address, len * sizeof (WCHAR), | |
653 | &done); | |
654 | ||
655 | WideCharToMultiByte (CP_ACP, 0, unicode_address, len, buf, len, 0, 0); | |
656 | } | |
657 | ||
658 | return buf; | |
659 | } | |
660 | ||
661 | /* Wait for child to do something. Return pid of child, or -1 in case | |
662 | of error; store status through argument pointer OURSTATUS. */ | |
663 | static int | |
664 | handle_load_dll (void *dummy) | |
665 | { | |
666 | LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll; | |
667 | char dll_buf[MAX_PATH + 1]; | |
668 | char *dll_name = NULL; | |
669 | char *p; | |
670 | ||
671 | dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0'; | |
672 | ||
673 | if (!psapi_get_dll_name ((DWORD) (event->lpBaseOfDll), dll_buf)) | |
674 | dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0'; | |
675 | ||
676 | dll_name = dll_buf; | |
677 | ||
678 | if (*dll_name == '\0') | |
679 | dll_name = get_image_name (current_process_handle, event->lpImageName, event->fUnicode); | |
680 | if (!dll_name) | |
681 | return 1; | |
682 | ||
683 | register_loaded_dll (dll_name, (DWORD) event->lpBaseOfDll + 0x1000); | |
684 | ||
685 | return 1; | |
686 | } | |
687 | ||
688 | static int | |
689 | handle_unload_dll (void *dummy) | |
690 | { | |
691 | DWORD lpBaseOfDll = (DWORD) current_event.u.UnloadDll.lpBaseOfDll + 0x1000; | |
692 | struct so_stuff *so; | |
693 | ||
694 | for (so = &solib_start; so->next != NULL; so = so->next) | |
695 | if (so->next->load_addr == lpBaseOfDll) | |
696 | { | |
697 | struct so_stuff *sodel = so->next; | |
698 | so->next = sodel->next; | |
699 | if (!so->next) | |
700 | solib_end = so; | |
701 | if (sodel->objfile) | |
702 | free_objfile (sodel->objfile); | |
703 | xfree(sodel); | |
704 | return 1; | |
705 | } | |
706 | error ("Error: dll starting at 0x%lx not found.\n", (DWORD) lpBaseOfDll); | |
707 | ||
708 | return 0; | |
709 | } | |
710 | ||
711 | /* Return name of last loaded DLL. */ | |
712 | char * | |
713 | child_solib_loaded_library_pathname (int pid) | |
714 | { | |
715 | return !solib_end || !solib_end->name[0] ? NULL : solib_end->name; | |
716 | } | |
717 | ||
718 | /* Clear list of loaded DLLs. */ | |
719 | void | |
720 | child_clear_solibs (void) | |
721 | { | |
722 | struct so_stuff *so, *so1 = solib_start.next; | |
723 | ||
724 | while ((so = so1) != NULL) | |
725 | { | |
726 | so1 = so->next; | |
727 | xfree (so); | |
728 | } | |
729 | ||
730 | solib_start.next = NULL; | |
731 | solib_start.objfile = NULL; | |
732 | solib_end = &solib_start; | |
733 | max_dll_name_len = sizeof ("DLL Name") - 1; | |
734 | } | |
735 | ||
736 | /* Add DLL symbol information. */ | |
737 | static struct objfile * | |
738 | solib_symbols_add (char *name, int from_tty, CORE_ADDR load_addr) | |
739 | { | |
740 | struct section_addr_info section_addrs; | |
741 | ||
742 | /* The symbols in a dll are offset by 0x1000, which is the | |
743 | the offset from 0 of the first byte in an image - because | |
744 | of the file header and the section alignment. */ | |
745 | ||
746 | if (!name || !name[0]) | |
747 | return NULL; | |
748 | ||
749 | memset (§ion_addrs, 0, sizeof (section_addrs)); | |
750 | section_addrs.other[0].name = ".text"; | |
751 | section_addrs.other[0].addr = load_addr; | |
752 | return safe_symbol_file_add (name, from_tty, NULL, 0, OBJF_SHARED); | |
753 | } | |
754 | ||
755 | /* Load DLL symbol info. */ | |
756 | void | |
757 | dll_symbol_command (char *args, int from_tty) | |
758 | { | |
759 | int n; | |
760 | dont_repeat (); | |
761 | ||
762 | if (args == NULL) | |
763 | error ("dll-symbols requires a file name"); | |
764 | ||
765 | n = strlen (args); | |
766 | if (n > 4 && strcasecmp (args + n - 4, ".dll") != 0) | |
767 | { | |
768 | char *newargs = (char *) alloca (n + 4 + 1); | |
769 | strcpy (newargs, args); | |
770 | strcat (newargs, ".dll"); | |
771 | args = newargs; | |
772 | } | |
773 | ||
774 | safe_symbol_file_add (args, from_tty, NULL, 0, OBJF_SHARED | OBJF_USERLOADED); | |
775 | } | |
776 | ||
777 | /* List currently loaded DLLs. */ | |
778 | void | |
779 | info_dll_command (char *ignore, int from_tty) | |
780 | { | |
781 | struct so_stuff *so = &solib_start; | |
782 | ||
783 | if (!so->next) | |
784 | return; | |
785 | ||
786 | printf_filtered ("%*s Load Address\n", -max_dll_name_len, "DLL Name"); | |
787 | while ((so = so->next) != NULL) | |
788 | printf_filtered ("%*s %08lx\n", -max_dll_name_len, so->name, so->load_addr); | |
789 | ||
790 | return; | |
791 | } | |
792 | ||
793 | /* Handle DEBUG_STRING output from child process. | |
794 | Cygwin prepends its messages with a "cygwin:". Interpret this as | |
795 | a Cygwin signal. Otherwise just print the string as a warning. */ | |
796 | static int | |
797 | handle_output_debug_string (struct target_waitstatus *ourstatus) | |
798 | { | |
799 | char *s; | |
800 | int gotasig = FALSE; | |
801 | ||
802 | if (!target_read_string | |
803 | ((CORE_ADDR) current_event.u.DebugString.lpDebugStringData, &s, 1024, 0) | |
804 | || !s || !*s) | |
805 | return gotasig; | |
806 | ||
807 | if (strncmp (s, CYGWIN_SIGNAL_STRING, sizeof (CYGWIN_SIGNAL_STRING) - 1) != 0) | |
808 | { | |
809 | if (strncmp (s, "cYg", 3) != 0) | |
810 | warning ("%s", s); | |
811 | } | |
812 | else | |
813 | { | |
814 | char *p; | |
815 | int sig = strtol (s + sizeof (CYGWIN_SIGNAL_STRING) - 1, &p, 0); | |
816 | gotasig = target_signal_from_host (sig); | |
817 | ourstatus->value.sig = gotasig; | |
818 | if (gotasig) | |
819 | ourstatus->kind = TARGET_WAITKIND_STOPPED; | |
820 | } | |
821 | ||
822 | xfree (s); | |
823 | return gotasig; | |
824 | } | |
825 | ||
826 | static int | |
827 | display_selector (HANDLE thread, DWORD sel) | |
828 | { | |
829 | LDT_ENTRY info; | |
830 | if (GetThreadSelectorEntry (thread, sel, &info)) | |
831 | { | |
832 | int base, limit; | |
833 | printf_filtered ("0x%03lx: ", sel); | |
834 | if (!info.HighWord.Bits.Pres) | |
835 | { | |
836 | puts_filtered ("Segment not present\n"); | |
837 | return 0; | |
838 | } | |
839 | base = (info.HighWord.Bits.BaseHi << 24) + | |
840 | (info.HighWord.Bits.BaseMid << 16) | |
841 | + info.BaseLow; | |
842 | limit = (info.HighWord.Bits.LimitHi << 16) + info.LimitLow; | |
843 | if (info.HighWord.Bits.Granularity) | |
844 | limit = (limit << 12) | 0xfff; | |
845 | printf_filtered ("base=0x%08x limit=0x%08x", base, limit); | |
846 | if (info.HighWord.Bits.Default_Big) | |
847 | puts_filtered(" 32-bit "); | |
848 | else | |
849 | puts_filtered(" 16-bit "); | |
850 | switch ((info.HighWord.Bits.Type & 0xf) >> 1) | |
851 | { | |
852 | case 0: | |
853 | puts_filtered ("Data (Read-Only, Exp-up"); | |
854 | break; | |
855 | case 1: | |
856 | puts_filtered ("Data (Read/Write, Exp-up"); | |
857 | break; | |
858 | case 2: | |
859 | puts_filtered ("Unused segment ("); | |
860 | break; | |
861 | case 3: | |
862 | puts_filtered ("Data (Read/Write, Exp-down"); | |
863 | break; | |
864 | case 4: | |
865 | puts_filtered ("Code (Exec-Only, N.Conf"); | |
866 | break; | |
867 | case 5: | |
868 | puts_filtered ("Code (Exec/Read, N.Conf"); | |
869 | break; | |
870 | case 6: | |
871 | puts_filtered ("Code (Exec-Only, Conf"); | |
872 | break; | |
873 | case 7: | |
874 | puts_filtered ("Code (Exec/Read, Conf"); | |
875 | break; | |
876 | default: | |
877 | printf_filtered ("Unknown type 0x%x",info.HighWord.Bits.Type); | |
878 | } | |
879 | if ((info.HighWord.Bits.Type & 0x1) == 0) | |
880 | puts_filtered(", N.Acc"); | |
881 | puts_filtered (")\n"); | |
882 | if ((info.HighWord.Bits.Type & 0x10) == 0) | |
883 | puts_filtered("System selector "); | |
884 | printf_filtered ("Priviledge level = %d. ", info.HighWord.Bits.Dpl); | |
885 | if (info.HighWord.Bits.Granularity) | |
886 | puts_filtered ("Page granular.\n"); | |
887 | else | |
888 | puts_filtered ("Byte granular.\n"); | |
889 | return 1; | |
890 | } | |
891 | else | |
892 | { | |
893 | printf_filtered ("Invalid selector 0x%lx.\n",sel); | |
894 | return 0; | |
895 | } | |
896 | } | |
897 | ||
898 | static void | |
899 | display_selectors (char * args, int from_tty) | |
900 | { | |
901 | if (!current_thread) | |
902 | { | |
903 | puts_filtered ("Impossible to display selectors now.\n"); | |
904 | return; | |
905 | } | |
906 | if (!args) | |
907 | { | |
908 | ||
909 | puts_filtered ("Selector $cs\n"); | |
910 | display_selector (current_thread->h, | |
911 | current_thread->context.SegCs); | |
912 | puts_filtered ("Selector $ds\n"); | |
913 | display_selector (current_thread->h, | |
914 | current_thread->context.SegDs); | |
915 | puts_filtered ("Selector $es\n"); | |
916 | display_selector (current_thread->h, | |
917 | current_thread->context.SegEs); | |
918 | puts_filtered ("Selector $ss\n"); | |
919 | display_selector (current_thread->h, | |
920 | current_thread->context.SegSs); | |
921 | puts_filtered ("Selector $fs\n"); | |
922 | display_selector (current_thread->h, | |
923 | current_thread->context.SegFs); | |
924 | puts_filtered ("Selector $gs\n"); | |
925 | display_selector (current_thread->h, | |
926 | current_thread->context.SegGs); | |
927 | } | |
928 | else | |
929 | { | |
930 | int sel; | |
931 | sel = parse_and_eval_long (args); | |
932 | printf_filtered ("Selector \"%s\"\n",args); | |
933 | display_selector (current_thread->h, sel); | |
934 | } | |
935 | } | |
936 | ||
937 | static struct cmd_list_element *info_w32_cmdlist = NULL; | |
938 | ||
939 | static void | |
940 | info_w32_command (char *args, int from_tty) | |
941 | { | |
942 | help_list (info_w32_cmdlist, "info w32 ", class_info, gdb_stdout); | |
943 | } | |
944 | ||
945 | ||
946 | #define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \ | |
947 | printf_unfiltered ("gdb: Target exception %s at 0x%08lx\n", x, \ | |
948 | (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress) | |
949 | ||
950 | static int | |
951 | handle_exception (struct target_waitstatus *ourstatus) | |
952 | { | |
953 | thread_info *th; | |
954 | DWORD code = current_event.u.Exception.ExceptionRecord.ExceptionCode; | |
955 | ||
956 | ourstatus->kind = TARGET_WAITKIND_STOPPED; | |
957 | ||
958 | /* Record the context of the current thread */ | |
959 | th = thread_rec (current_event.dwThreadId, -1); | |
960 | ||
961 | switch (code) | |
962 | { | |
963 | case EXCEPTION_ACCESS_VIOLATION: | |
964 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ACCESS_VIOLATION"); | |
965 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; | |
966 | break; | |
967 | case STATUS_STACK_OVERFLOW: | |
968 | DEBUG_EXCEPTION_SIMPLE ("STATUS_STACK_OVERFLOW"); | |
969 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; | |
970 | break; | |
971 | case STATUS_FLOAT_DENORMAL_OPERAND: | |
972 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DENORMAL_OPERAND"); | |
973 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
974 | break; | |
975 | case EXCEPTION_ARRAY_BOUNDS_EXCEEDED: | |
976 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ARRAY_BOUNDS_EXCEEDED"); | |
977 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
978 | break; | |
979 | case STATUS_FLOAT_INEXACT_RESULT: | |
980 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INEXACT_RESULT"); | |
981 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
982 | break; | |
983 | case STATUS_FLOAT_INVALID_OPERATION: | |
984 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INVALID_OPERATION"); | |
985 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
986 | break; | |
987 | case STATUS_FLOAT_OVERFLOW: | |
988 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_OVERFLOW"); | |
989 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
990 | break; | |
991 | case STATUS_FLOAT_STACK_CHECK: | |
992 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_STACK_CHECK"); | |
993 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
994 | break; | |
995 | case STATUS_FLOAT_UNDERFLOW: | |
996 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_UNDERFLOW"); | |
997 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
998 | break; | |
999 | case STATUS_FLOAT_DIVIDE_BY_ZERO: | |
1000 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DIVIDE_BY_ZERO"); | |
1001 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
1002 | break; | |
1003 | case STATUS_INTEGER_DIVIDE_BY_ZERO: | |
1004 | DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_DIVIDE_BY_ZERO"); | |
1005 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
1006 | break; | |
1007 | case STATUS_INTEGER_OVERFLOW: | |
1008 | DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_OVERFLOW"); | |
1009 | ourstatus->value.sig = TARGET_SIGNAL_FPE; | |
1010 | break; | |
1011 | case EXCEPTION_BREAKPOINT: | |
1012 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT"); | |
1013 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; | |
1014 | break; | |
1015 | case DBG_CONTROL_C: | |
1016 | DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_C"); | |
1017 | ourstatus->value.sig = TARGET_SIGNAL_INT; | |
1018 | break; | |
1019 | case DBG_CONTROL_BREAK: | |
1020 | DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_BREAK"); | |
1021 | ourstatus->value.sig = TARGET_SIGNAL_INT; | |
1022 | break; | |
1023 | case EXCEPTION_SINGLE_STEP: | |
1024 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_SINGLE_STEP"); | |
1025 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; | |
1026 | break; | |
1027 | case EXCEPTION_ILLEGAL_INSTRUCTION: | |
1028 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ILLEGAL_INSTRUCTION"); | |
1029 | ourstatus->value.sig = TARGET_SIGNAL_ILL; | |
1030 | break; | |
1031 | case EXCEPTION_PRIV_INSTRUCTION: | |
1032 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_PRIV_INSTRUCTION"); | |
1033 | ourstatus->value.sig = TARGET_SIGNAL_ILL; | |
1034 | break; | |
1035 | case EXCEPTION_NONCONTINUABLE_EXCEPTION: | |
1036 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_NONCONTINUABLE_EXCEPTION"); | |
1037 | ourstatus->value.sig = TARGET_SIGNAL_ILL; | |
1038 | break; | |
1039 | default: | |
1040 | if (current_event.u.Exception.dwFirstChance) | |
1041 | return 0; | |
1042 | printf_unfiltered ("gdb: unknown target exception 0x%08lx at 0x%08lx\n", | |
1043 | current_event.u.Exception.ExceptionRecord.ExceptionCode, | |
1044 | (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress); | |
1045 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; | |
1046 | break; | |
1047 | } | |
1048 | exception_count++; | |
1049 | last_sig = ourstatus->value.sig; | |
1050 | return 1; | |
1051 | } | |
1052 | ||
1053 | /* Resume all artificially suspended threads if we are continuing | |
1054 | execution */ | |
1055 | static BOOL | |
1056 | child_continue (DWORD continue_status, int id) | |
1057 | { | |
1058 | int i; | |
1059 | thread_info *th; | |
1060 | BOOL res; | |
1061 | ||
1062 | DEBUG_EVENTS (("ContinueDebugEvent (cpid=%ld, ctid=%ld, %s);\n", | |
1063 | current_event.dwProcessId, current_event.dwThreadId, | |
1064 | continue_status == DBG_CONTINUE ? | |
1065 | "DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED")); | |
1066 | res = ContinueDebugEvent (current_event.dwProcessId, | |
1067 | current_event.dwThreadId, | |
1068 | continue_status); | |
1069 | continue_status = 0; | |
1070 | if (res) | |
1071 | for (th = &thread_head; (th = th->next) != NULL;) | |
1072 | if (((id == -1) || (id == (int) th->id)) && th->suspend_count) | |
1073 | { | |
1074 | ||
1075 | for (i = 0; i < th->suspend_count; i++) | |
1076 | (void) ResumeThread (th->h); | |
1077 | th->suspend_count = 0; | |
1078 | if (debug_registers_changed) | |
1079 | { | |
1080 | /* Only change the value of the debug reisters */ | |
1081 | th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; | |
1082 | th->context.Dr0 = dr[0]; | |
1083 | th->context.Dr1 = dr[1]; | |
1084 | th->context.Dr2 = dr[2]; | |
1085 | th->context.Dr3 = dr[3]; | |
1086 | /* th->context.Dr6 = dr[6]; | |
1087 | FIXME: should we set dr6 also ?? */ | |
1088 | th->context.Dr7 = dr[7]; | |
1089 | CHECK (SetThreadContext (th->h, &th->context)); | |
1090 | th->context.ContextFlags = 0; | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | debug_registers_changed = 0; | |
1095 | return res; | |
1096 | } | |
1097 | ||
1098 | /* Get the next event from the child. Return 1 if the event requires | |
1099 | handling by WFI (or whatever). | |
1100 | */ | |
1101 | static int | |
1102 | get_child_debug_event (int pid, struct target_waitstatus *ourstatus) | |
1103 | { | |
1104 | BOOL debug_event; | |
1105 | DWORD continue_status, event_code; | |
1106 | thread_info *th = NULL; | |
1107 | static thread_info dummy_thread_info; | |
1108 | int retval = 0; | |
1109 | ||
1110 | last_sig = TARGET_SIGNAL_0; | |
1111 | ||
1112 | if (!(debug_event = WaitForDebugEvent (¤t_event, 1000))) | |
1113 | goto out; | |
1114 | ||
1115 | event_count++; | |
1116 | continue_status = DBG_CONTINUE; | |
1117 | ||
1118 | event_code = current_event.dwDebugEventCode; | |
1119 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
1120 | ||
1121 | switch (event_code) | |
1122 | { | |
1123 | case CREATE_THREAD_DEBUG_EVENT: | |
1124 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%x code=%s)\n", | |
1125 | (unsigned) current_event.dwProcessId, | |
1126 | (unsigned) current_event.dwThreadId, | |
1127 | "CREATE_THREAD_DEBUG_EVENT")); | |
1128 | if (saw_create != 1) | |
1129 | break; | |
1130 | /* Record the existence of this thread */ | |
1131 | th = child_add_thread (current_event.dwThreadId, | |
1132 | current_event.u.CreateThread.hThread); | |
1133 | if (info_verbose) | |
1134 | printf_unfiltered ("[New %s]\n", | |
1135 | target_pid_to_str ( | |
1136 | pid_to_ptid (current_event.dwThreadId))); | |
1137 | retval = current_event.dwThreadId; | |
1138 | break; | |
1139 | ||
1140 | case EXIT_THREAD_DEBUG_EVENT: | |
1141 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", | |
1142 | (unsigned) current_event.dwProcessId, | |
1143 | (unsigned) current_event.dwThreadId, | |
1144 | "EXIT_THREAD_DEBUG_EVENT")); | |
1145 | if (saw_create != 1) | |
1146 | break; | |
1147 | child_delete_thread (current_event.dwThreadId); | |
1148 | th = &dummy_thread_info; | |
1149 | break; | |
1150 | ||
1151 | case CREATE_PROCESS_DEBUG_EVENT: | |
1152 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", | |
1153 | (unsigned) current_event.dwProcessId, | |
1154 | (unsigned) current_event.dwThreadId, | |
1155 | "CREATE_PROCESS_DEBUG_EVENT")); | |
1156 | CloseHandle (current_event.u.CreateProcessInfo.hFile); | |
1157 | if (++saw_create != 1) | |
1158 | { | |
1159 | CloseHandle (current_event.u.CreateProcessInfo.hProcess); | |
1160 | break; | |
1161 | } | |
1162 | ||
1163 | current_process_handle = current_event.u.CreateProcessInfo.hProcess; | |
1164 | main_thread_id = current_event.dwThreadId; | |
1165 | /* Add the main thread */ | |
1166 | #if 0 | |
1167 | th = child_add_thread (current_event.dwProcessId, | |
1168 | current_event.u.CreateProcessInfo.hProcess); | |
1169 | #endif | |
1170 | th = child_add_thread (main_thread_id, | |
1171 | current_event.u.CreateProcessInfo.hThread); | |
1172 | retval = ourstatus->value.related_pid = current_event.dwThreadId; | |
1173 | break; | |
1174 | ||
1175 | case EXIT_PROCESS_DEBUG_EVENT: | |
1176 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", | |
1177 | (unsigned) current_event.dwProcessId, | |
1178 | (unsigned) current_event.dwThreadId, | |
1179 | "EXIT_PROCESS_DEBUG_EVENT")); | |
1180 | if (saw_create != 1) | |
1181 | break; | |
1182 | ourstatus->kind = TARGET_WAITKIND_EXITED; | |
1183 | ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode; | |
1184 | CloseHandle (current_process_handle); | |
1185 | retval = main_thread_id; | |
1186 | break; | |
1187 | ||
1188 | case LOAD_DLL_DEBUG_EVENT: | |
1189 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", | |
1190 | (unsigned) current_event.dwProcessId, | |
1191 | (unsigned) current_event.dwThreadId, | |
1192 | "LOAD_DLL_DEBUG_EVENT")); | |
1193 | CloseHandle (current_event.u.LoadDll.hFile); | |
1194 | if (saw_create != 1) | |
1195 | break; | |
1196 | catch_errors (handle_load_dll, NULL, (char *) "", RETURN_MASK_ALL); | |
1197 | registers_changed (); /* mark all regs invalid */ | |
1198 | ourstatus->kind = TARGET_WAITKIND_LOADED; | |
1199 | ourstatus->value.integer = 0; | |
1200 | retval = main_thread_id; | |
1201 | break; | |
1202 | ||
1203 | case UNLOAD_DLL_DEBUG_EVENT: | |
1204 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", | |
1205 | (unsigned) current_event.dwProcessId, | |
1206 | (unsigned) current_event.dwThreadId, | |
1207 | "UNLOAD_DLL_DEBUG_EVENT")); | |
1208 | if (saw_create != 1) | |
1209 | break; | |
1210 | catch_errors (handle_unload_dll, NULL, (char *) "", RETURN_MASK_ALL); | |
1211 | registers_changed (); /* mark all regs invalid */ | |
1212 | /* ourstatus->kind = TARGET_WAITKIND_UNLOADED; | |
1213 | does not exist yet. */ | |
1214 | break; | |
1215 | ||
1216 | case EXCEPTION_DEBUG_EVENT: | |
1217 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", | |
1218 | (unsigned) current_event.dwProcessId, | |
1219 | (unsigned) current_event.dwThreadId, | |
1220 | "EXCEPTION_DEBUG_EVENT")); | |
1221 | if (saw_create != 1) | |
1222 | break; | |
1223 | if (handle_exception (ourstatus)) | |
1224 | retval = current_event.dwThreadId; | |
1225 | break; | |
1226 | ||
1227 | case OUTPUT_DEBUG_STRING_EVENT: /* message from the kernel */ | |
1228 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", | |
1229 | (unsigned) current_event.dwProcessId, | |
1230 | (unsigned) current_event.dwThreadId, | |
1231 | "OUTPUT_DEBUG_STRING_EVENT")); | |
1232 | if (saw_create != 1) | |
1233 | break; | |
1234 | if (handle_output_debug_string (ourstatus)) | |
1235 | retval = main_thread_id; | |
1236 | break; | |
1237 | ||
1238 | default: | |
1239 | if (saw_create != 1) | |
1240 | break; | |
1241 | printf_unfiltered ("gdb: kernel event for pid=%ld tid=%ld\n", | |
1242 | (DWORD) current_event.dwProcessId, | |
1243 | (DWORD) current_event.dwThreadId); | |
1244 | printf_unfiltered (" unknown event code %ld\n", | |
1245 | current_event.dwDebugEventCode); | |
1246 | break; | |
1247 | } | |
1248 | ||
1249 | if (!retval || saw_create != 1) | |
1250 | CHECK (child_continue (continue_status, -1)); | |
1251 | else | |
1252 | { | |
1253 | current_thread = th ? : thread_rec (current_event.dwThreadId, TRUE); | |
1254 | inferior_ptid = pid_to_ptid (retval); | |
1255 | } | |
1256 | ||
1257 | out: | |
1258 | return retval; | |
1259 | } | |
1260 | ||
1261 | /* Wait for interesting events to occur in the target process. */ | |
1262 | static ptid_t | |
1263 | child_wait (ptid_t ptid, struct target_waitstatus *ourstatus) | |
1264 | { | |
1265 | int pid = PIDGET (ptid); | |
1266 | ||
1267 | /* We loop when we get a non-standard exception rather than return | |
1268 | with a SPURIOUS because resume can try and step or modify things, | |
1269 | which needs a current_thread->h. But some of these exceptions mark | |
1270 | the birth or death of threads, which mean that the current thread | |
1271 | isn't necessarily what you think it is. */ | |
1272 | ||
1273 | while (1) | |
1274 | { | |
1275 | int retval = get_child_debug_event (pid, ourstatus); | |
1276 | if (retval) | |
1277 | return pid_to_ptid (retval); | |
1278 | else | |
1279 | { | |
1280 | int detach = 0; | |
1281 | ||
1282 | if (ui_loop_hook != NULL) | |
1283 | detach = ui_loop_hook (0); | |
1284 | ||
1285 | if (detach) | |
1286 | child_kill_inferior (); | |
1287 | } | |
1288 | } | |
1289 | } | |
1290 | ||
1291 | static void | |
1292 | do_initial_child_stuff (DWORD pid) | |
1293 | { | |
1294 | extern int stop_after_trap; | |
1295 | int i; | |
1296 | ||
1297 | last_sig = TARGET_SIGNAL_0; | |
1298 | event_count = 0; | |
1299 | exception_count = 0; | |
1300 | debug_registers_changed = 0; | |
1301 | debug_registers_used = 0; | |
1302 | for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++) | |
1303 | dr[i] = 0; | |
1304 | current_event.dwProcessId = pid; | |
1305 | memset (¤t_event, 0, sizeof (current_event)); | |
1306 | push_target (&child_ops); | |
1307 | child_init_thread_list (); | |
1308 | child_clear_solibs (); | |
1309 | clear_proceed_status (); | |
1310 | init_wait_for_inferior (); | |
1311 | ||
1312 | target_terminal_init (); | |
1313 | target_terminal_inferior (); | |
1314 | ||
1315 | while (1) | |
1316 | { | |
1317 | stop_after_trap = 1; | |
1318 | wait_for_inferior (); | |
1319 | if (stop_signal != TARGET_SIGNAL_TRAP) | |
1320 | resume (0, stop_signal); | |
1321 | else | |
1322 | break; | |
1323 | } | |
1324 | stop_after_trap = 0; | |
1325 | return; | |
1326 | } | |
1327 | ||
1328 | /* Since Windows XP, detaching from a process is supported by Windows. | |
1329 | The following code tries loading the appropriate functions dynamically. | |
1330 | If loading these functions succeeds use them to actually detach from | |
1331 | the inferior process, otherwise behave as usual, pretending that | |
1332 | detach has worked. */ | |
1333 | static BOOL WINAPI (*DebugSetProcessKillOnExit)(BOOL); | |
1334 | static BOOL WINAPI (*DebugActiveProcessStop)(DWORD); | |
1335 | ||
1336 | static int | |
1337 | has_detach_ability () | |
1338 | { | |
1339 | static HMODULE kernel32 = NULL; | |
1340 | ||
1341 | if (!kernel32) | |
1342 | kernel32 = LoadLibrary ("kernel32.dll"); | |
1343 | if (kernel32) | |
1344 | { | |
1345 | if (!DebugSetProcessKillOnExit) | |
1346 | DebugSetProcessKillOnExit = GetProcAddress (kernel32, | |
1347 | "DebugSetProcessKillOnExit"); | |
1348 | if (!DebugActiveProcessStop) | |
1349 | DebugActiveProcessStop = GetProcAddress (kernel32, | |
1350 | "DebugActiveProcessStop"); | |
1351 | if (DebugSetProcessKillOnExit && DebugActiveProcessStop) | |
1352 | return 1; | |
1353 | } | |
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | /* Attach to process PID, then initialize for debugging it. */ | |
1358 | static void | |
1359 | child_attach (char *args, int from_tty) | |
1360 | { | |
1361 | BOOL ok; | |
1362 | DWORD pid; | |
1363 | ||
1364 | if (!args) | |
1365 | error_no_arg ("process-id to attach"); | |
1366 | ||
1367 | pid = strtoul (args, 0, 0); | |
1368 | ok = DebugActiveProcess (pid); | |
1369 | ||
1370 | if (!ok) | |
1371 | error ("Can't attach to process."); | |
1372 | ||
1373 | if (has_detach_ability ()) | |
1374 | { | |
1375 | attach_flag = 1; | |
1376 | DebugSetProcessKillOnExit (FALSE); | |
1377 | } | |
1378 | ||
1379 | if (from_tty) | |
1380 | { | |
1381 | char *exec_file = (char *) get_exec_file (0); | |
1382 | ||
1383 | if (exec_file) | |
1384 | printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, | |
1385 | target_pid_to_str (pid_to_ptid (pid))); | |
1386 | else | |
1387 | printf_unfiltered ("Attaching to %s\n", | |
1388 | target_pid_to_str (pid_to_ptid (pid))); | |
1389 | ||
1390 | gdb_flush (gdb_stdout); | |
1391 | } | |
1392 | ||
1393 | do_initial_child_stuff (pid); | |
1394 | target_terminal_ours (); | |
1395 | } | |
1396 | ||
1397 | static void | |
1398 | child_detach (char *args, int from_tty) | |
1399 | { | |
1400 | int detached = 1; | |
1401 | ||
1402 | if (has_detach_ability ()) | |
1403 | { | |
1404 | delete_command (NULL, 0); | |
1405 | child_continue (DBG_CONTINUE, -1); | |
1406 | if (!DebugActiveProcessStop (current_event.dwProcessId)) | |
1407 | { | |
1408 | error ("Can't detach process %lu (error %lu)", | |
1409 | current_event.dwProcessId, GetLastError ()); | |
1410 | detached = 0; | |
1411 | } | |
1412 | DebugSetProcessKillOnExit (FALSE); | |
1413 | } | |
1414 | if (detached && from_tty) | |
1415 | { | |
1416 | char *exec_file = get_exec_file (0); | |
1417 | if (exec_file == 0) | |
1418 | exec_file = ""; | |
1419 | printf_unfiltered ("Detaching from program: %s, Pid %lu\n", exec_file, | |
1420 | current_event.dwProcessId); | |
1421 | gdb_flush (gdb_stdout); | |
1422 | } | |
1423 | inferior_ptid = null_ptid; | |
1424 | unpush_target (&child_ops); | |
1425 | } | |
1426 | ||
1427 | /* Print status information about what we're accessing. */ | |
1428 | ||
1429 | static void | |
1430 | child_files_info (struct target_ops *ignore) | |
1431 | { | |
1432 | printf_unfiltered ("\tUsing the running image of %s %s.\n", | |
1433 | attach_flag ? "attached" : "child", target_pid_to_str (inferior_ptid)); | |
1434 | } | |
1435 | ||
1436 | /* ARGSUSED */ | |
1437 | static void | |
1438 | child_open (char *arg, int from_tty) | |
1439 | { | |
1440 | error ("Use the \"run\" command to start a Unix child process."); | |
1441 | } | |
1442 | ||
1443 | /* Start an inferior win32 child process and sets inferior_ptid to its pid. | |
1444 | EXEC_FILE is the file to run. | |
1445 | ALLARGS is a string containing the arguments to the program. | |
1446 | ENV is the environment vector to pass. Errors reported with error(). */ | |
1447 | ||
1448 | static void | |
1449 | child_create_inferior (char *exec_file, char *allargs, char **env) | |
1450 | { | |
1451 | char *winenv; | |
1452 | char *temp; | |
1453 | int envlen; | |
1454 | int i; | |
1455 | STARTUPINFO si; | |
1456 | PROCESS_INFORMATION pi; | |
1457 | BOOL ret; | |
1458 | DWORD flags; | |
1459 | char *args; | |
1460 | char real_path[MAXPATHLEN]; | |
1461 | char *toexec; | |
1462 | ||
1463 | if (!exec_file) | |
1464 | error ("No executable specified, use `target exec'.\n"); | |
1465 | ||
1466 | memset (&si, 0, sizeof (si)); | |
1467 | si.cb = sizeof (si); | |
1468 | ||
1469 | flags = 0; | |
1470 | ||
1471 | if (new_group) | |
1472 | flags |= CREATE_NEW_PROCESS_GROUP; | |
1473 | ||
1474 | if (new_console) | |
1475 | flags |= CREATE_NEW_CONSOLE; | |
1476 | ||
1477 | if (!useshell || !shell[0]) | |
1478 | { | |
1479 | flags = DEBUG_ONLY_THIS_PROCESS; | |
1480 | cygwin_conv_to_win32_path (exec_file, real_path); | |
1481 | toexec = real_path; | |
1482 | } | |
1483 | else | |
1484 | { | |
1485 | char *newallargs = alloca (sizeof (" -c 'exec '") + strlen (exec_file) + strlen (allargs) + 2); | |
1486 | sprintf (newallargs, " -c 'exec %s %s'", exec_file, allargs); | |
1487 | allargs = newallargs; | |
1488 | toexec = shell; | |
1489 | flags = DEBUG_PROCESS; | |
1490 | } | |
1491 | ||
1492 | args = alloca (strlen (toexec) + strlen (allargs) + 2); | |
1493 | strcpy (args, toexec); | |
1494 | strcat (args, " "); | |
1495 | strcat (args, allargs); | |
1496 | ||
1497 | /* Prepare the environment vars for CreateProcess. */ | |
1498 | { | |
1499 | /* This code use to assume all env vars were file names and would | |
1500 | translate them all to win32 style. That obviously doesn't work in the | |
1501 | general case. The current rule is that we only translate PATH. | |
1502 | We need to handle PATH because we're about to call CreateProcess and | |
1503 | it uses PATH to find DLL's. Fortunately PATH has a well-defined value | |
1504 | in both posix and win32 environments. cygwin.dll will change it back | |
1505 | to posix style if necessary. */ | |
1506 | ||
1507 | static const char *conv_path_names[] = | |
1508 | { | |
1509 | "PATH=", | |
1510 | 0 | |
1511 | }; | |
1512 | ||
1513 | /* CreateProcess takes the environment list as a null terminated set of | |
1514 | strings (i.e. two nulls terminate the list). */ | |
1515 | ||
1516 | /* Get total size for env strings. */ | |
1517 | for (envlen = 0, i = 0; env[i] && *env[i]; i++) | |
1518 | { | |
1519 | int j, len; | |
1520 | ||
1521 | for (j = 0; conv_path_names[j]; j++) | |
1522 | { | |
1523 | len = strlen (conv_path_names[j]); | |
1524 | if (strncmp (conv_path_names[j], env[i], len) == 0) | |
1525 | { | |
1526 | if (cygwin_posix_path_list_p (env[i] + len)) | |
1527 | envlen += len | |
1528 | + cygwin_posix_to_win32_path_list_buf_size (env[i] + len); | |
1529 | else | |
1530 | envlen += strlen (env[i]) + 1; | |
1531 | break; | |
1532 | } | |
1533 | } | |
1534 | if (conv_path_names[j] == NULL) | |
1535 | envlen += strlen (env[i]) + 1; | |
1536 | } | |
1537 | ||
1538 | winenv = alloca (envlen + 1); | |
1539 | ||
1540 | /* Copy env strings into new buffer. */ | |
1541 | for (temp = winenv, i = 0; env[i] && *env[i]; i++) | |
1542 | { | |
1543 | int j, len; | |
1544 | ||
1545 | for (j = 0; conv_path_names[j]; j++) | |
1546 | { | |
1547 | len = strlen (conv_path_names[j]); | |
1548 | if (strncmp (conv_path_names[j], env[i], len) == 0) | |
1549 | { | |
1550 | if (cygwin_posix_path_list_p (env[i] + len)) | |
1551 | { | |
1552 | memcpy (temp, env[i], len); | |
1553 | cygwin_posix_to_win32_path_list (env[i] + len, temp + len); | |
1554 | } | |
1555 | else | |
1556 | strcpy (temp, env[i]); | |
1557 | break; | |
1558 | } | |
1559 | } | |
1560 | if (conv_path_names[j] == NULL) | |
1561 | strcpy (temp, env[i]); | |
1562 | ||
1563 | temp += strlen (temp) + 1; | |
1564 | } | |
1565 | ||
1566 | /* Final nil string to terminate new env. */ | |
1567 | *temp = 0; | |
1568 | } | |
1569 | ||
1570 | ret = CreateProcess (0, | |
1571 | args, /* command line */ | |
1572 | NULL, /* Security */ | |
1573 | NULL, /* thread */ | |
1574 | TRUE, /* inherit handles */ | |
1575 | flags, /* start flags */ | |
1576 | winenv, | |
1577 | NULL, /* current directory */ | |
1578 | &si, | |
1579 | &pi); | |
1580 | if (!ret) | |
1581 | error ("Error creating process %s, (error %d)\n", exec_file, GetLastError ()); | |
1582 | ||
1583 | CloseHandle (pi.hThread); | |
1584 | CloseHandle (pi.hProcess); | |
1585 | ||
1586 | if (useshell && shell[0] != '\0') | |
1587 | saw_create = -1; | |
1588 | else | |
1589 | saw_create = 0; | |
1590 | ||
1591 | do_initial_child_stuff (pi.dwProcessId); | |
1592 | ||
1593 | /* child_continue (DBG_CONTINUE, -1); */ | |
1594 | proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_0, 0); | |
1595 | } | |
1596 | ||
1597 | static void | |
1598 | child_mourn_inferior (void) | |
1599 | { | |
1600 | (void) child_continue (DBG_CONTINUE, -1); | |
1601 | i386_cleanup_dregs(); | |
1602 | unpush_target (&child_ops); | |
1603 | generic_mourn_inferior (); | |
1604 | } | |
1605 | ||
1606 | /* Send a SIGINT to the process group. This acts just like the user typed a | |
1607 | ^C on the controlling terminal. */ | |
1608 | ||
1609 | static void | |
1610 | child_stop (void) | |
1611 | { | |
1612 | DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n")); | |
1613 | CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId)); | |
1614 | registers_changed (); /* refresh register state */ | |
1615 | } | |
1616 | ||
1617 | int | |
1618 | child_xfer_memory (CORE_ADDR memaddr, char *our, int len, | |
1619 | int write, struct mem_attrib *mem, | |
1620 | struct target_ops *target) | |
1621 | { | |
1622 | DWORD done; | |
1623 | if (write) | |
1624 | { | |
1625 | DEBUG_MEM (("gdb: write target memory, %d bytes at 0x%08lx\n", | |
1626 | len, (DWORD) memaddr)); | |
1627 | WriteProcessMemory (current_process_handle, (LPVOID) memaddr, our, | |
1628 | len, &done); | |
1629 | FlushInstructionCache (current_process_handle, (LPCVOID) memaddr, len); | |
1630 | } | |
1631 | else | |
1632 | { | |
1633 | DEBUG_MEM (("gdb: read target memory, %d bytes at 0x%08lx\n", | |
1634 | len, (DWORD) memaddr)); | |
1635 | ReadProcessMemory (current_process_handle, (LPCVOID) memaddr, our, len, | |
1636 | &done); | |
1637 | } | |
1638 | return done; | |
1639 | } | |
1640 | ||
1641 | void | |
1642 | child_kill_inferior (void) | |
1643 | { | |
1644 | CHECK (TerminateProcess (current_process_handle, 0)); | |
1645 | ||
1646 | for (;;) | |
1647 | { | |
1648 | if (!child_continue (DBG_CONTINUE, -1)) | |
1649 | break; | |
1650 | if (!WaitForDebugEvent (¤t_event, INFINITE)) | |
1651 | break; | |
1652 | if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT) | |
1653 | break; | |
1654 | } | |
1655 | ||
1656 | CHECK (CloseHandle (current_process_handle)); | |
1657 | ||
1658 | /* this may fail in an attached process so don't check. */ | |
1659 | (void) CloseHandle (current_thread->h); | |
1660 | target_mourn_inferior (); /* or just child_mourn_inferior? */ | |
1661 | } | |
1662 | ||
1663 | void | |
1664 | child_resume (ptid_t ptid, int step, enum target_signal sig) | |
1665 | { | |
1666 | thread_info *th; | |
1667 | DWORD continue_status = DBG_CONTINUE; | |
1668 | ||
1669 | int pid = PIDGET (ptid); | |
1670 | ||
1671 | if (sig != TARGET_SIGNAL_0) | |
1672 | { | |
1673 | if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT) | |
1674 | { | |
1675 | DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig)); | |
1676 | } | |
1677 | else if (sig == last_sig) | |
1678 | continue_status = DBG_EXCEPTION_NOT_HANDLED; | |
1679 | else | |
1680 | #if 0 | |
1681 | /* This code does not seem to work, because | |
1682 | the kernel does probably not consider changes in the ExceptionRecord | |
1683 | structure when passing the exception to the inferior. | |
1684 | Note that this seems possible in the exception handler itself. */ | |
1685 | { | |
1686 | int i; | |
1687 | for (i = 0; xlate[i].them != -1; i++) | |
1688 | if (xlate[i].us == sig) | |
1689 | { | |
1690 | current_event.u.Exception.ExceptionRecord.ExceptionCode = | |
1691 | xlate[i].them; | |
1692 | continue_status = DBG_EXCEPTION_NOT_HANDLED; | |
1693 | break; | |
1694 | } | |
1695 | if (continue_status == DBG_CONTINUE) | |
1696 | { | |
1697 | DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig)); | |
1698 | } | |
1699 | } | |
1700 | #endif | |
1701 | DEBUG_EXCEPT(("Can only continue with recieved signal %d.\n", | |
1702 | last_sig)); | |
1703 | } | |
1704 | ||
1705 | last_sig = TARGET_SIGNAL_0; | |
1706 | ||
1707 | DEBUG_EXEC (("gdb: child_resume (pid=%d, step=%d, sig=%d);\n", | |
1708 | pid, step, sig)); | |
1709 | ||
1710 | /* Get context for currently selected thread */ | |
1711 | th = thread_rec (current_event.dwThreadId, FALSE); | |
1712 | if (th) | |
1713 | { | |
1714 | if (step) | |
1715 | { | |
1716 | /* Single step by setting t bit */ | |
1717 | child_fetch_inferior_registers (PS_REGNUM); | |
1718 | th->context.EFlags |= FLAG_TRACE_BIT; | |
1719 | } | |
1720 | ||
1721 | if (th->context.ContextFlags) | |
1722 | { | |
1723 | if (debug_registers_changed) | |
1724 | { | |
1725 | th->context.Dr0 = dr[0]; | |
1726 | th->context.Dr1 = dr[1]; | |
1727 | th->context.Dr2 = dr[2]; | |
1728 | th->context.Dr3 = dr[3]; | |
1729 | /* th->context.Dr6 = dr[6]; | |
1730 | FIXME: should we set dr6 also ?? */ | |
1731 | th->context.Dr7 = dr[7]; | |
1732 | } | |
1733 | CHECK (SetThreadContext (th->h, &th->context)); | |
1734 | th->context.ContextFlags = 0; | |
1735 | } | |
1736 | } | |
1737 | ||
1738 | /* Allow continuing with the same signal that interrupted us. | |
1739 | Otherwise complain. */ | |
1740 | ||
1741 | child_continue (continue_status, pid); | |
1742 | } | |
1743 | ||
1744 | static void | |
1745 | child_prepare_to_store (void) | |
1746 | { | |
1747 | /* Do nothing, since we can store individual regs */ | |
1748 | } | |
1749 | ||
1750 | static int | |
1751 | child_can_run (void) | |
1752 | { | |
1753 | return 1; | |
1754 | } | |
1755 | ||
1756 | static void | |
1757 | child_close (int x) | |
1758 | { | |
1759 | DEBUG_EVENTS (("gdb: child_close, inferior_ptid=%d\n", | |
1760 | PIDGET (inferior_ptid))); | |
1761 | } | |
1762 | ||
1763 | struct target_ops child_ops; | |
1764 | ||
1765 | static void | |
1766 | init_child_ops (void) | |
1767 | { | |
1768 | child_ops.to_shortname = "child"; | |
1769 | child_ops.to_longname = "Win32 child process"; | |
1770 | child_ops.to_doc = "Win32 child process (started by the \"run\" command)."; | |
1771 | child_ops.to_open = child_open; | |
1772 | child_ops.to_close = child_close; | |
1773 | child_ops.to_attach = child_attach; | |
1774 | child_ops.to_detach = child_detach; | |
1775 | child_ops.to_resume = child_resume; | |
1776 | child_ops.to_wait = child_wait; | |
1777 | child_ops.to_fetch_registers = child_fetch_inferior_registers; | |
1778 | child_ops.to_store_registers = child_store_inferior_registers; | |
1779 | child_ops.to_prepare_to_store = child_prepare_to_store; | |
1780 | child_ops.to_xfer_memory = child_xfer_memory; | |
1781 | child_ops.to_files_info = child_files_info; | |
1782 | child_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
1783 | child_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
1784 | child_ops.to_terminal_init = terminal_init_inferior; | |
1785 | child_ops.to_terminal_inferior = terminal_inferior; | |
1786 | child_ops.to_terminal_ours_for_output = terminal_ours_for_output; | |
1787 | child_ops.to_terminal_ours = terminal_ours; | |
1788 | child_ops.to_terminal_info = child_terminal_info; | |
1789 | child_ops.to_kill = child_kill_inferior; | |
1790 | child_ops.to_load = 0; | |
1791 | child_ops.to_lookup_symbol = 0; | |
1792 | child_ops.to_create_inferior = child_create_inferior; | |
1793 | child_ops.to_mourn_inferior = child_mourn_inferior; | |
1794 | child_ops.to_can_run = child_can_run; | |
1795 | child_ops.to_notice_signals = 0; | |
1796 | child_ops.to_thread_alive = win32_child_thread_alive; | |
1797 | child_ops.to_pid_to_str = cygwin_pid_to_str; | |
1798 | child_ops.to_stop = child_stop; | |
1799 | child_ops.to_stratum = process_stratum; | |
1800 | child_ops.DONT_USE = 0; | |
1801 | child_ops.to_has_all_memory = 1; | |
1802 | child_ops.to_has_memory = 1; | |
1803 | child_ops.to_has_stack = 1; | |
1804 | child_ops.to_has_registers = 1; | |
1805 | child_ops.to_has_execution = 1; | |
1806 | child_ops.to_sections = 0; | |
1807 | child_ops.to_sections_end = 0; | |
1808 | child_ops.to_magic = OPS_MAGIC; | |
1809 | } | |
1810 | ||
1811 | void | |
1812 | _initialize_inftarg (void) | |
1813 | { | |
1814 | struct cmd_list_element *c; | |
1815 | const char *sh; | |
1816 | ||
1817 | init_child_ops (); | |
1818 | ||
1819 | c = add_com ("dll-symbols", class_files, dll_symbol_command, | |
1820 | "Load dll library symbols from FILE."); | |
1821 | c->completer = filename_completer; | |
1822 | ||
1823 | sh = getenv ("SHELL"); | |
1824 | if (!sh) | |
1825 | sh = "/bin/sh"; | |
1826 | if (access (sh, X_OK) != 0) | |
1827 | { | |
1828 | shell[0] = '\0'; | |
1829 | useshell = 0; | |
1830 | } | |
1831 | else | |
1832 | { | |
1833 | cygwin_conv_to_win32_path (sh, shell); | |
1834 | useshell = 1; | |
1835 | } | |
1836 | ||
1837 | add_com_alias ("sharedlibrary", "dll-symbols", class_alias, 1); | |
1838 | ||
1839 | add_show_from_set (add_set_cmd ("shell", class_support, var_boolean, | |
1840 | (char *) &useshell, | |
1841 | "Set use of shell to start subprocess.", | |
1842 | &setlist), | |
1843 | &showlist); | |
1844 | ||
1845 | add_show_from_set (add_set_cmd ("new-console", class_support, var_boolean, | |
1846 | (char *) &new_console, | |
1847 | "Set creation of new console when creating child process.", | |
1848 | &setlist), | |
1849 | &showlist); | |
1850 | ||
1851 | add_show_from_set (add_set_cmd ("new-group", class_support, var_boolean, | |
1852 | (char *) &new_group, | |
1853 | "Set creation of new group when creating child process.", | |
1854 | &setlist), | |
1855 | &showlist); | |
1856 | ||
1857 | add_show_from_set (add_set_cmd ("debugexec", class_support, var_boolean, | |
1858 | (char *) &debug_exec, | |
1859 | "Set whether to display execution in child process.", | |
1860 | &setlist), | |
1861 | &showlist); | |
1862 | ||
1863 | add_show_from_set (add_set_cmd ("debugevents", class_support, var_boolean, | |
1864 | (char *) &debug_events, | |
1865 | "Set whether to display kernel events in child process.", | |
1866 | &setlist), | |
1867 | &showlist); | |
1868 | ||
1869 | add_show_from_set (add_set_cmd ("debugmemory", class_support, var_boolean, | |
1870 | (char *) &debug_memory, | |
1871 | "Set whether to display memory accesses in child process.", | |
1872 | &setlist), | |
1873 | &showlist); | |
1874 | ||
1875 | add_show_from_set (add_set_cmd ("debugexceptions", class_support, var_boolean, | |
1876 | (char *) &debug_exceptions, | |
1877 | "Set whether to display kernel exceptions in child process.", | |
1878 | &setlist), | |
1879 | &showlist); | |
1880 | ||
1881 | add_info ("dll", info_dll_command, "Status of loaded DLLs."); | |
1882 | add_info_alias ("sharedlibrary", "dll", 1); | |
1883 | ||
1884 | add_prefix_cmd ("w32", class_info, info_w32_command, | |
1885 | "Print information specific to Win32 debugging.", | |
1886 | &info_w32_cmdlist, "info w32 ", 0, &infolist); | |
1887 | ||
1888 | add_cmd ("selector", class_info, display_selectors, | |
1889 | "Display selectors infos.", | |
1890 | &info_w32_cmdlist); | |
1891 | ||
1892 | add_target (&child_ops); | |
1893 | } | |
1894 | ||
1895 | /* Hardware watchpoint support, adapted from go32-nat.c code. */ | |
1896 | ||
1897 | /* Pass the address ADDR to the inferior in the I'th debug register. | |
1898 | Here we just store the address in dr array, the registers will be | |
1899 | actually set up when child_continue is called. */ | |
1900 | void | |
1901 | cygwin_set_dr (int i, CORE_ADDR addr) | |
1902 | { | |
1903 | if (i < 0 || i > 3) | |
1904 | internal_error (__FILE__, __LINE__, | |
1905 | "Invalid register %d in cygwin_set_dr.\n", i); | |
1906 | dr[i] = (unsigned) addr; | |
1907 | debug_registers_changed = 1; | |
1908 | debug_registers_used = 1; | |
1909 | } | |
1910 | ||
1911 | /* Pass the value VAL to the inferior in the DR7 debug control | |
1912 | register. Here we just store the address in D_REGS, the watchpoint | |
1913 | will be actually set up in child_wait. */ | |
1914 | void | |
1915 | cygwin_set_dr7 (unsigned val) | |
1916 | { | |
1917 | dr[7] = val; | |
1918 | debug_registers_changed = 1; | |
1919 | debug_registers_used = 1; | |
1920 | } | |
1921 | ||
1922 | /* Get the value of the DR6 debug status register from the inferior. | |
1923 | Here we just return the value stored in dr[6] | |
1924 | by the last call to thread_rec for current_event.dwThreadId id. */ | |
1925 | unsigned | |
1926 | cygwin_get_dr6 (void) | |
1927 | { | |
1928 | return dr[6]; | |
1929 | } | |
1930 | ||
1931 | ||
1932 | /* Determine if the thread referenced by "pid" is alive | |
1933 | by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0 | |
1934 | it means that the pid has died. Otherwise it is assumed to be alive. */ | |
1935 | static int | |
1936 | win32_child_thread_alive (ptid_t ptid) | |
1937 | { | |
1938 | int pid = PIDGET (ptid); | |
1939 | ||
1940 | return WaitForSingleObject (thread_rec (pid, FALSE)->h, 0) == WAIT_OBJECT_0 ? | |
1941 | FALSE : TRUE; | |
1942 | } | |
1943 | ||
1944 | /* Convert pid to printable format. */ | |
1945 | char * | |
1946 | cygwin_pid_to_str (ptid_t ptid) | |
1947 | { | |
1948 | static char buf[80]; | |
1949 | int pid = PIDGET (ptid); | |
1950 | ||
1951 | if ((DWORD) pid == current_event.dwProcessId) | |
1952 | sprintf (buf, "process %d", pid); | |
1953 | else | |
1954 | sprintf (buf, "thread %ld.0x%x", current_event.dwProcessId, pid); | |
1955 | return buf; | |
1956 | } | |
1957 | ||
1958 | static int | |
1959 | core_dll_symbols_add (char *dll_name, DWORD base_addr) | |
1960 | { | |
1961 | struct objfile *objfile; | |
1962 | char *objfile_basename; | |
1963 | const char *dll_basename; | |
1964 | ||
1965 | if (!(dll_basename = strrchr (dll_name, '/'))) | |
1966 | dll_basename = dll_name; | |
1967 | else | |
1968 | dll_basename++; | |
1969 | ||
1970 | ALL_OBJFILES (objfile) | |
1971 | { | |
1972 | objfile_basename = strrchr (objfile->name, '/'); | |
1973 | ||
1974 | if (objfile_basename && | |
1975 | strcmp (dll_basename, objfile_basename + 1) == 0) | |
1976 | { | |
1977 | printf_unfiltered ("%08lx:%s (symbols previously loaded)\n", | |
1978 | base_addr, dll_name); | |
1979 | goto out; | |
1980 | } | |
1981 | } | |
1982 | ||
1983 | register_loaded_dll (dll_name, base_addr + 0x1000); | |
1984 | solib_symbols_add (dll_name, 0, (CORE_ADDR) base_addr + 0x1000); | |
1985 | ||
1986 | out: | |
1987 | return 1; | |
1988 | } | |
1989 | ||
1990 | typedef struct | |
1991 | { | |
1992 | struct target_ops *target; | |
1993 | bfd_vma addr; | |
1994 | } | |
1995 | map_code_section_args; | |
1996 | ||
1997 | static void | |
1998 | map_single_dll_code_section (bfd * abfd, asection * sect, void *obj) | |
1999 | { | |
2000 | int old; | |
2001 | int update_coreops; | |
2002 | struct section_table *new_target_sect_ptr; | |
2003 | ||
2004 | map_code_section_args *args = (map_code_section_args *) obj; | |
2005 | struct target_ops *target = args->target; | |
2006 | if (sect->flags & SEC_CODE) | |
2007 | { | |
2008 | update_coreops = core_ops.to_sections == target->to_sections; | |
2009 | ||
2010 | if (target->to_sections) | |
2011 | { | |
2012 | old = target->to_sections_end - target->to_sections; | |
2013 | target->to_sections = (struct section_table *) | |
2014 | xrealloc ((char *) target->to_sections, | |
2015 | (sizeof (struct section_table)) * (1 + old)); | |
2016 | } | |
2017 | else | |
2018 | { | |
2019 | old = 0; | |
2020 | target->to_sections = (struct section_table *) | |
2021 | xmalloc ((sizeof (struct section_table))); | |
2022 | } | |
2023 | target->to_sections_end = target->to_sections + (1 + old); | |
2024 | ||
2025 | /* Update the to_sections field in the core_ops structure | |
2026 | if needed. */ | |
2027 | if (update_coreops) | |
2028 | { | |
2029 | core_ops.to_sections = target->to_sections; | |
2030 | core_ops.to_sections_end = target->to_sections_end; | |
2031 | } | |
2032 | new_target_sect_ptr = target->to_sections + old; | |
2033 | new_target_sect_ptr->addr = args->addr + bfd_section_vma (abfd, sect); | |
2034 | new_target_sect_ptr->endaddr = args->addr + bfd_section_vma (abfd, sect) + | |
2035 | bfd_section_size (abfd, sect);; | |
2036 | new_target_sect_ptr->the_bfd_section = sect; | |
2037 | new_target_sect_ptr->bfd = abfd; | |
2038 | } | |
2039 | } | |
2040 | ||
2041 | static int | |
2042 | dll_code_sections_add (const char *dll_name, int base_addr, struct target_ops *target) | |
2043 | { | |
2044 | bfd *dll_bfd; | |
2045 | map_code_section_args map_args; | |
2046 | asection *lowest_sect; | |
2047 | char *name; | |
2048 | if (dll_name == NULL || target == NULL) | |
2049 | return 0; | |
2050 | name = xstrdup (dll_name); | |
2051 | dll_bfd = bfd_openr (name, "pei-i386"); | |
2052 | if (dll_bfd == NULL) | |
2053 | return 0; | |
2054 | ||
2055 | if (bfd_check_format (dll_bfd, bfd_object)) | |
2056 | { | |
2057 | lowest_sect = bfd_get_section_by_name (dll_bfd, ".text"); | |
2058 | if (lowest_sect == NULL) | |
2059 | return 0; | |
2060 | map_args.target = target; | |
2061 | map_args.addr = base_addr - bfd_section_vma (dll_bfd, lowest_sect); | |
2062 | ||
2063 | bfd_map_over_sections (dll_bfd, &map_single_dll_code_section, (void *) (&map_args)); | |
2064 | } | |
2065 | ||
2066 | return 1; | |
2067 | } | |
2068 | ||
2069 | static void | |
2070 | core_section_load_dll_symbols (bfd * abfd, asection * sect, void *obj) | |
2071 | { | |
2072 | struct target_ops *target = (struct target_ops *) obj; | |
2073 | ||
2074 | DWORD base_addr; | |
2075 | ||
2076 | int dll_name_size; | |
2077 | char *dll_name = NULL; | |
2078 | char *buf = NULL; | |
2079 | struct win32_pstatus *pstatus; | |
2080 | char *p; | |
2081 | ||
2082 | if (strncmp (sect->name, ".module", 7)) | |
2083 | return; | |
2084 | ||
2085 | buf = (char *) xmalloc (sect->_raw_size + 1); | |
2086 | if (!buf) | |
2087 | { | |
2088 | printf_unfiltered ("memory allocation failed for %s\n", sect->name); | |
2089 | goto out; | |
2090 | } | |
2091 | if (!bfd_get_section_contents (abfd, sect, buf, 0, sect->_raw_size)) | |
2092 | goto out; | |
2093 | ||
2094 | pstatus = (struct win32_pstatus *) buf; | |
2095 | ||
2096 | memmove (&base_addr, &(pstatus->data.module_info.base_address), sizeof (base_addr)); | |
2097 | dll_name_size = pstatus->data.module_info.module_name_size; | |
2098 | if (offsetof (struct win32_pstatus, data.module_info.module_name) + dll_name_size > sect->_raw_size) | |
2099 | goto out; | |
2100 | ||
2101 | dll_name = (char *) xmalloc (dll_name_size + 1); | |
2102 | if (!dll_name) | |
2103 | { | |
2104 | printf_unfiltered ("memory allocation failed for %s\n", sect->name); | |
2105 | goto out; | |
2106 | } | |
2107 | strncpy (dll_name, pstatus->data.module_info.module_name, dll_name_size); | |
2108 | ||
2109 | while ((p = strchr (dll_name, '\\'))) | |
2110 | *p = '/'; | |
2111 | ||
2112 | if (!core_dll_symbols_add (dll_name, (DWORD) base_addr)) | |
2113 | printf_unfiltered ("%s: Failed to load dll symbols.\n", dll_name); | |
2114 | ||
2115 | if (!dll_code_sections_add (dll_name, (DWORD) base_addr + 0x1000, target)) | |
2116 | printf_unfiltered ("%s: Failed to map dll code sections.\n", dll_name); | |
2117 | ||
2118 | out: | |
2119 | if (buf) | |
2120 | xfree (buf); | |
2121 | if (dll_name) | |
2122 | xfree (dll_name); | |
2123 | return; | |
2124 | } | |
2125 | ||
2126 | void | |
2127 | child_solib_add (char *filename, int from_tty, struct target_ops *target, | |
2128 | int readsyms) | |
2129 | { | |
2130 | if (!readsyms) | |
2131 | return; | |
2132 | if (core_bfd) | |
2133 | { | |
2134 | child_clear_solibs (); | |
2135 | bfd_map_over_sections (core_bfd, &core_section_load_dll_symbols, target); | |
2136 | } | |
2137 | else | |
2138 | { | |
2139 | if (solib_end && solib_end->name) | |
2140 | solib_end->objfile = solib_symbols_add (solib_end->name, from_tty, | |
2141 | solib_end->load_addr); | |
2142 | } | |
2143 | } | |
2144 | ||
2145 | static void | |
2146 | fetch_elf_core_registers (char *core_reg_sect, | |
2147 | unsigned core_reg_size, | |
2148 | int which, | |
2149 | CORE_ADDR reg_addr) | |
2150 | { | |
2151 | int r; | |
2152 | if (core_reg_size < sizeof (CONTEXT)) | |
2153 | { | |
2154 | error ("Core file register section too small (%u bytes).", core_reg_size); | |
2155 | return; | |
2156 | } | |
2157 | for (r = 0; r < NUM_REGS; r++) | |
2158 | supply_register (r, core_reg_sect + mappings[r]); | |
2159 | } | |
2160 | ||
2161 | static struct core_fns win32_elf_core_fns = | |
2162 | { | |
2163 | bfd_target_elf_flavour, | |
2164 | default_check_format, | |
2165 | default_core_sniffer, | |
2166 | fetch_elf_core_registers, | |
2167 | NULL | |
2168 | }; | |
2169 | ||
2170 | void | |
2171 | _initialize_core_win32 (void) | |
2172 | { | |
2173 | add_core_fns (&win32_elf_core_fns); | |
2174 | } | |
2175 | ||
2176 | void | |
2177 | _initialize_check_for_gdb_ini (void) | |
2178 | { | |
2179 | char *homedir; | |
2180 | if (inhibit_gdbinit) | |
2181 | return; | |
2182 | ||
2183 | homedir = getenv ("HOME"); | |
2184 | if (homedir) | |
2185 | { | |
2186 | char *p; | |
2187 | char *oldini = (char *) alloca (strlen (homedir) + | |
2188 | sizeof ("/gdb.ini")); | |
2189 | strcpy (oldini, homedir); | |
2190 | p = strchr (oldini, '\0'); | |
2191 | if (p > oldini && p[-1] != '/') | |
2192 | *p++ = '/'; | |
2193 | strcpy (p, "gdb.ini"); | |
2194 | if (access (oldini, 0) == 0) | |
2195 | { | |
2196 | int len = strlen (oldini); | |
2197 | char *newini = alloca (len + 1); | |
2198 | sprintf (newini, "%.*s.gdbinit", | |
2199 | (int) (len - (sizeof ("gdb.ini") - 1)), oldini); | |
2200 | warning ("obsolete '%s' found. Rename to '%s'.", oldini, newini); | |
2201 | } | |
2202 | } | |
2203 | } |