1 /* Copyright (C) 2008-2021 Free Software Foundation, Inc.
2
3 This file is part of GDB.
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17
18 #include "defs.h"
19 #include "windows-tdep.h"
20 #include "gdb_obstack.h"
21 #include "xml-support.h"
22 #include "gdbarch.h"
23 #include "target.h"
24 #include "value.h"
25 #include "inferior.h"
26 #include "command.h"
27 #include "gdbcmd.h"
28 #include "gdbthread.h"
29 #include "objfiles.h"
30 #include "symfile.h"
31 #include "coff-pe-read.h"
32 #include "gdb_bfd.h"
33 #include "complaints.h"
34 #include "solib.h"
35 #include "solib-target.h"
36 #include "gdbcore.h"
37 #include "coff/internal.h"
38 #include "libcoff.h"
39 #include "solist.h"
40
41 #define CYGWIN_DLL_NAME "cygwin1.dll"
42
43 /* Windows signal numbers differ between MinGW flavors and between
44 those and Cygwin. The below enumerations were gleaned from the
45 respective headers. */
46
47 /* Signal numbers for the various MinGW flavors. The ones marked with
48 MinGW-w64 are defined by MinGW-w64, not by mingw.org's MinGW. */
49
50 enum
51 {
52 WINDOWS_SIGHUP = 1, /* MinGW-w64 */
53 WINDOWS_SIGINT = 2,
54 WINDOWS_SIGQUIT = 3, /* MinGW-w64 */
55 WINDOWS_SIGILL = 4,
56 WINDOWS_SIGTRAP = 5, /* MinGW-w64 */
57 WINDOWS_SIGIOT = 6, /* MinGW-w64 */
58 WINDOWS_SIGEMT = 7, /* MinGW-w64 */
59 WINDOWS_SIGFPE = 8,
60 WINDOWS_SIGKILL = 9, /* MinGW-w64 */
61 WINDOWS_SIGBUS = 10, /* MinGW-w64 */
62 WINDOWS_SIGSEGV = 11,
63 WINDOWS_SIGSYS = 12, /* MinGW-w64 */
64 WINDOWS_SIGPIPE = 13, /* MinGW-w64 */
65 WINDOWS_SIGALRM = 14, /* MinGW-w64 */
66 WINDOWS_SIGTERM = 15,
67 WINDOWS_SIGBREAK = 21,
68 WINDOWS_SIGABRT = 22,
69 };
70
71 /* Signal numbers for Cygwin. */
72
73 enum
74 {
75 CYGWIN_SIGHUP = 1,
76 CYGWIN_SIGINT = 2,
77 CYGWIN_SIGQUIT = 3,
78 CYGWIN_SIGILL = 4,
79 CYGWIN_SIGTRAP = 5,
80 CYGWIN_SIGABRT = 6,
81 CYGWIN_SIGEMT = 7,
82 CYGWIN_SIGFPE = 8,
83 CYGWIN_SIGKILL = 9,
84 CYGWIN_SIGBUS = 10,
85 CYGWIN_SIGSEGV = 11,
86 CYGWIN_SIGSYS = 12,
87 CYGWIN_SIGPIPE = 13,
88 CYGWIN_SIGALRM = 14,
89 CYGWIN_SIGTERM = 15,
90 CYGWIN_SIGURG = 16,
91 CYGWIN_SIGSTOP = 17,
92 CYGWIN_SIGTSTP = 18,
93 CYGWIN_SIGCONT = 19,
94 CYGWIN_SIGCHLD = 20,
95 CYGWIN_SIGTTIN = 21,
96 CYGWIN_SIGTTOU = 22,
97 CYGWIN_SIGIO = 23,
98 CYGWIN_SIGXCPU = 24,
99 CYGWIN_SIGXFSZ = 25,
100 CYGWIN_SIGVTALRM = 26,
101 CYGWIN_SIGPROF = 27,
102 CYGWIN_SIGWINCH = 28,
103 CYGWIN_SIGLOST = 29,
104 CYGWIN_SIGUSR1 = 30,
105 CYGWIN_SIGUSR2 = 31,
106 };
107
108 /* These constants are defined by Cygwin's core_dump.h */
109 static constexpr unsigned int NOTE_INFO_MODULE = 3;
110 static constexpr unsigned int NOTE_INFO_MODULE64 = 4;
111
112 struct cmd_list_element *info_w32_cmdlist;
113
114 typedef struct thread_information_block_32
115 {
116 uint32_t current_seh; /* %fs:0x0000 */
117 uint32_t current_top_of_stack; /* %fs:0x0004 */
118 uint32_t current_bottom_of_stack; /* %fs:0x0008 */
119 uint32_t sub_system_tib; /* %fs:0x000c */
120 uint32_t fiber_data; /* %fs:0x0010 */
121 uint32_t arbitrary_data_slot; /* %fs:0x0014 */
122 uint32_t linear_address_tib; /* %fs:0x0018 */
123 uint32_t environment_pointer; /* %fs:0x001c */
124 uint32_t process_id; /* %fs:0x0020 */
125 uint32_t current_thread_id; /* %fs:0x0024 */
126 uint32_t active_rpc_handle; /* %fs:0x0028 */
127 uint32_t thread_local_storage; /* %fs:0x002c */
128 uint32_t process_environment_block; /* %fs:0x0030 */
129 uint32_t last_error_number; /* %fs:0x0034 */
130 }
131 thread_information_32;
132
133 typedef struct thread_information_block_64
134 {
135 uint64_t current_seh; /* %gs:0x0000 */
136 uint64_t current_top_of_stack; /* %gs:0x0008 */
137 uint64_t current_bottom_of_stack; /* %gs:0x0010 */
138 uint64_t sub_system_tib; /* %gs:0x0018 */
139 uint64_t fiber_data; /* %gs:0x0020 */
140 uint64_t arbitrary_data_slot; /* %gs:0x0028 */
141 uint64_t linear_address_tib; /* %gs:0x0030 */
142 uint64_t environment_pointer; /* %gs:0x0038 */
143 uint64_t process_id; /* %gs:0x0040 */
144 uint64_t current_thread_id; /* %gs:0x0048 */
145 uint64_t active_rpc_handle; /* %gs:0x0050 */
146 uint64_t thread_local_storage; /* %gs:0x0058 */
147 uint64_t process_environment_block; /* %gs:0x0060 */
148 uint64_t last_error_number; /* %gs:0x0068 */
149 }
150 thread_information_64;
151
152
153 static const char* TIB_NAME[] =
154 {
155 " current_seh ", /* %fs:0x0000 */
156 " current_top_of_stack ", /* %fs:0x0004 */
157 " current_bottom_of_stack ", /* %fs:0x0008 */
158 " sub_system_tib ", /* %fs:0x000c */
159 " fiber_data ", /* %fs:0x0010 */
160 " arbitrary_data_slot ", /* %fs:0x0014 */
161 " linear_address_tib ", /* %fs:0x0018 */
162 " environment_pointer ", /* %fs:0x001c */
163 " process_id ", /* %fs:0x0020 */
164 " current_thread_id ", /* %fs:0x0024 */
165 " active_rpc_handle ", /* %fs:0x0028 */
166 " thread_local_storage ", /* %fs:0x002c */
167 " process_environment_block ", /* %fs:0x0030 */
168 " last_error_number " /* %fs:0x0034 */
169 };
170
171 static const int MAX_TIB32 =
172 sizeof (thread_information_32) / sizeof (uint32_t);
173 static const int MAX_TIB64 =
174 sizeof (thread_information_64) / sizeof (uint64_t);
175 static const int FULL_TIB_SIZE = 0x1000;
176
177 static bool maint_display_all_tib = false;
178
179 static struct gdbarch_data *windows_gdbarch_data_handle;
180
181 struct windows_gdbarch_data
182 {
183 struct type *siginfo_type;
184 struct type *tib_ptr_type; /* Type of thread information block */
185 };
186
187 /* Allocate windows_gdbarch_data for an arch. */
188
189 static void *
init_windows_gdbarch_data(struct gdbarch * gdbarch)190 init_windows_gdbarch_data (struct gdbarch *gdbarch)
191 {
192 return GDBARCH_OBSTACK_ZALLOC (gdbarch, struct windows_gdbarch_data);
193 }
194
195 /* Get windows_gdbarch_data of an arch. */
196
197 static struct windows_gdbarch_data *
get_windows_gdbarch_data(struct gdbarch * gdbarch)198 get_windows_gdbarch_data (struct gdbarch *gdbarch)
199 {
200 return ((struct windows_gdbarch_data *)
201 gdbarch_data (gdbarch, windows_gdbarch_data_handle));
202 }
203
204 /* Define Thread Local Base pointer type. */
205
206 static struct type *
windows_get_tlb_type(struct gdbarch * gdbarch)207 windows_get_tlb_type (struct gdbarch *gdbarch)
208 {
209 struct type *dword_ptr_type, *dword32_type, *void_ptr_type;
210 struct type *peb_ldr_type, *peb_ldr_ptr_type;
211 struct type *peb_type, *peb_ptr_type, *list_type;
212 struct type *module_list_ptr_type;
213 struct type *tib_type, *seh_type, *tib_ptr_type, *seh_ptr_type;
214 struct type *word_type, *wchar_type, *wchar_ptr_type;
215 struct type *uni_str_type, *rupp_type, *rupp_ptr_type;
216
217 windows_gdbarch_data *windows_gdbarch_data
218 = get_windows_gdbarch_data (gdbarch);
219 if (windows_gdbarch_data->tib_ptr_type != nullptr)
220 return windows_gdbarch_data->tib_ptr_type;
221
222 dword_ptr_type = arch_integer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
223 1, "DWORD_PTR");
224 dword32_type = arch_integer_type (gdbarch, 32,
225 1, "DWORD32");
226 word_type = arch_integer_type (gdbarch, 16,
227 1, "WORD");
228 wchar_type = arch_integer_type (gdbarch, 16,
229 1, "wchar_t");
230 void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void);
231 wchar_ptr_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
232 NULL, wchar_type);
233
234 /* list entry */
235
236 list_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
237 list_type->set_name (xstrdup ("list"));
238
239 module_list_ptr_type = void_ptr_type;
240
241 append_composite_type_field (list_type, "forward_list",
242 module_list_ptr_type);
243 append_composite_type_field (list_type, "backward_list",
244 module_list_ptr_type);
245
246 /* Structured Exception Handler */
247
248 seh_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
249 seh_type->set_name (xstrdup ("seh"));
250
251 seh_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
252 TYPE_LENGTH (void_ptr_type) * TARGET_CHAR_BIT,
253 NULL);
254 TYPE_TARGET_TYPE (seh_ptr_type) = seh_type;
255
256 append_composite_type_field (seh_type, "next_seh", seh_ptr_type);
257 append_composite_type_field (seh_type, "handler",
258 builtin_type (gdbarch)->builtin_func_ptr);
259
260 /* struct _PEB_LDR_DATA */
261 peb_ldr_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
262 peb_ldr_type->set_name (xstrdup ("peb_ldr_data"));
263
264 append_composite_type_field (peb_ldr_type, "length", dword32_type);
265 append_composite_type_field (peb_ldr_type, "initialized", dword32_type);
266 append_composite_type_field (peb_ldr_type, "ss_handle", void_ptr_type);
267 append_composite_type_field (peb_ldr_type, "in_load_order", list_type);
268 append_composite_type_field (peb_ldr_type, "in_memory_order", list_type);
269 append_composite_type_field (peb_ldr_type, "in_init_order", list_type);
270 append_composite_type_field (peb_ldr_type, "entry_in_progress",
271 void_ptr_type);
272 peb_ldr_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
273 TYPE_LENGTH (void_ptr_type) * TARGET_CHAR_BIT,
274 NULL);
275 TYPE_TARGET_TYPE (peb_ldr_ptr_type) = peb_ldr_type;
276
277 /* struct UNICODE_STRING */
278 uni_str_type = arch_composite_type (gdbarch, "unicode_string",
279 TYPE_CODE_STRUCT);
280
281 append_composite_type_field (uni_str_type, "length", word_type);
282 append_composite_type_field (uni_str_type, "maximum_length", word_type);
283 append_composite_type_field_aligned (uni_str_type, "buffer",
284 wchar_ptr_type,
285 TYPE_LENGTH (wchar_ptr_type));
286
287 /* struct _RTL_USER_PROCESS_PARAMETERS */
288 rupp_type = arch_composite_type (gdbarch, "rtl_user_process_parameters",
289 TYPE_CODE_STRUCT);
290
291 append_composite_type_field (rupp_type, "maximum_length", dword32_type);
292 append_composite_type_field (rupp_type, "length", dword32_type);
293 append_composite_type_field (rupp_type, "flags", dword32_type);
294 append_composite_type_field (rupp_type, "debug_flags", dword32_type);
295 append_composite_type_field (rupp_type, "console_handle", void_ptr_type);
296 append_composite_type_field (rupp_type, "console_flags", dword32_type);
297 append_composite_type_field_aligned (rupp_type, "standard_input",
298 void_ptr_type,
299 TYPE_LENGTH (void_ptr_type));
300 append_composite_type_field (rupp_type, "standard_output", void_ptr_type);
301 append_composite_type_field (rupp_type, "standard_error", void_ptr_type);
302 append_composite_type_field (rupp_type, "current_directory", uni_str_type);
303 append_composite_type_field (rupp_type, "current_directory_handle",
304 void_ptr_type);
305 append_composite_type_field (rupp_type, "dll_path", uni_str_type);
306 append_composite_type_field (rupp_type, "image_path_name", uni_str_type);
307 append_composite_type_field (rupp_type, "command_line", uni_str_type);
308 append_composite_type_field (rupp_type, "environment", void_ptr_type);
309 append_composite_type_field (rupp_type, "starting_x", dword32_type);
310 append_composite_type_field (rupp_type, "starting_y", dword32_type);
311 append_composite_type_field (rupp_type, "count_x", dword32_type);
312 append_composite_type_field (rupp_type, "count_y", dword32_type);
313 append_composite_type_field (rupp_type, "count_chars_x", dword32_type);
314 append_composite_type_field (rupp_type, "count_chars_y", dword32_type);
315 append_composite_type_field (rupp_type, "fill_attribute", dword32_type);
316 append_composite_type_field (rupp_type, "window_flags", dword32_type);
317 append_composite_type_field (rupp_type, "show_window_flags", dword32_type);
318 append_composite_type_field_aligned (rupp_type, "window_title",
319 uni_str_type,
320 TYPE_LENGTH (void_ptr_type));
321 append_composite_type_field (rupp_type, "desktop_info", uni_str_type);
322 append_composite_type_field (rupp_type, "shell_info", uni_str_type);
323 append_composite_type_field (rupp_type, "runtime_data", uni_str_type);
324
325 rupp_ptr_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
326 NULL, rupp_type);
327
328
329 /* struct process environment block */
330 peb_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
331 peb_type->set_name (xstrdup ("peb"));
332
333 /* First bytes contain several flags. */
334 append_composite_type_field (peb_type, "flags", dword_ptr_type);
335 append_composite_type_field (peb_type, "mutant", void_ptr_type);
336 append_composite_type_field (peb_type, "image_base_address", void_ptr_type);
337 append_composite_type_field (peb_type, "ldr", peb_ldr_ptr_type);
338 append_composite_type_field (peb_type, "process_parameters", rupp_ptr_type);
339 append_composite_type_field (peb_type, "sub_system_data", void_ptr_type);
340 append_composite_type_field (peb_type, "process_heap", void_ptr_type);
341 append_composite_type_field (peb_type, "fast_peb_lock", void_ptr_type);
342 peb_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
343 TYPE_LENGTH (void_ptr_type) * TARGET_CHAR_BIT,
344 NULL);
345 TYPE_TARGET_TYPE (peb_ptr_type) = peb_type;
346
347
348 /* struct thread information block */
349 tib_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
350 tib_type->set_name (xstrdup ("tib"));
351
352 /* uint32_t current_seh; %fs:0x0000 */
353 append_composite_type_field (tib_type, "current_seh", seh_ptr_type);
354 /* uint32_t current_top_of_stack; %fs:0x0004 */
355 append_composite_type_field (tib_type, "current_top_of_stack",
356 void_ptr_type);
357 /* uint32_t current_bottom_of_stack; %fs:0x0008 */
358 append_composite_type_field (tib_type, "current_bottom_of_stack",
359 void_ptr_type);
360 /* uint32_t sub_system_tib; %fs:0x000c */
361 append_composite_type_field (tib_type, "sub_system_tib", void_ptr_type);
362
363 /* uint32_t fiber_data; %fs:0x0010 */
364 append_composite_type_field (tib_type, "fiber_data", void_ptr_type);
365 /* uint32_t arbitrary_data_slot; %fs:0x0014 */
366 append_composite_type_field (tib_type, "arbitrary_data_slot", void_ptr_type);
367 /* uint32_t linear_address_tib; %fs:0x0018 */
368 append_composite_type_field (tib_type, "linear_address_tib", void_ptr_type);
369 /* uint32_t environment_pointer; %fs:0x001c */
370 append_composite_type_field (tib_type, "environment_pointer", void_ptr_type);
371 /* uint32_t process_id; %fs:0x0020 */
372 append_composite_type_field (tib_type, "process_id", dword_ptr_type);
373 /* uint32_t current_thread_id; %fs:0x0024 */
374 append_composite_type_field (tib_type, "thread_id", dword_ptr_type);
375 /* uint32_t active_rpc_handle; %fs:0x0028 */
376 append_composite_type_field (tib_type, "active_rpc_handle", dword_ptr_type);
377 /* uint32_t thread_local_storage; %fs:0x002c */
378 append_composite_type_field (tib_type, "thread_local_storage",
379 void_ptr_type);
380 /* uint32_t process_environment_block; %fs:0x0030 */
381 append_composite_type_field (tib_type, "process_environment_block",
382 peb_ptr_type);
383 /* uint32_t last_error_number; %fs:0x0034 */
384 append_composite_type_field (tib_type, "last_error_number", dword_ptr_type);
385
386 tib_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
387 TYPE_LENGTH (void_ptr_type) * TARGET_CHAR_BIT,
388 NULL);
389 TYPE_TARGET_TYPE (tib_ptr_type) = tib_type;
390
391 windows_gdbarch_data->tib_ptr_type = tib_ptr_type;
392
393 return tib_ptr_type;
394 }
395
396 /* The $_tlb convenience variable is a bit special. We don't know
397 for sure the type of the value until we actually have a chance to
398 fetch the data. The type can change depending on gdbarch, so it is
399 also dependent on which thread you have selected. */
400
401 /* This function implements the lval_computed support for reading a
402 $_tlb value. */
403
404 static void
tlb_value_read(struct value * val)405 tlb_value_read (struct value *val)
406 {
407 CORE_ADDR tlb;
408 struct type *type = check_typedef (value_type (val));
409
410 if (!target_get_tib_address (inferior_ptid, &tlb))
411 error (_("Unable to read tlb"));
412 store_typed_address (value_contents_raw (val), type, tlb);
413 }
414
415 /* This function implements the lval_computed support for writing a
416 $_tlb value. */
417
418 static void
tlb_value_write(struct value * v,struct value * fromval)419 tlb_value_write (struct value *v, struct value *fromval)
420 {
421 error (_("Impossible to change the Thread Local Base"));
422 }
423
424 static const struct lval_funcs tlb_value_funcs =
425 {
426 tlb_value_read,
427 tlb_value_write
428 };
429
430
431 /* Return a new value with the correct type for the tlb object of
432 the current thread using architecture GDBARCH. Return a void value
433 if there's no object available. */
434
435 static struct value *
tlb_make_value(struct gdbarch * gdbarch,struct internalvar * var,void * ignore)436 tlb_make_value (struct gdbarch *gdbarch, struct internalvar *var, void *ignore)
437 {
438 if (target_has_stack () && inferior_ptid != null_ptid)
439 {
440 struct type *type = windows_get_tlb_type (gdbarch);
441 return allocate_computed_value (type, &tlb_value_funcs, NULL);
442 }
443
444 return allocate_value (builtin_type (gdbarch)->builtin_void);
445 }
446
447
448 /* Display thread information block of a given thread. */
449
450 static int
display_one_tib(ptid_t ptid)451 display_one_tib (ptid_t ptid)
452 {
453 gdb_byte *tib = NULL;
454 gdb_byte *index;
455 CORE_ADDR thread_local_base;
456 ULONGEST i, val, max, max_name, size, tib_size;
457 ULONGEST sizeof_ptr = gdbarch_ptr_bit (target_gdbarch ());
458 enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
459
460 if (sizeof_ptr == 64)
461 {
462 size = sizeof (uint64_t);
463 tib_size = sizeof (thread_information_64);
464 max = MAX_TIB64;
465 }
466 else
467 {
468 size = sizeof (uint32_t);
469 tib_size = sizeof (thread_information_32);
470 max = MAX_TIB32;
471 }
472
473 max_name = max;
474
475 if (maint_display_all_tib)
476 {
477 tib_size = FULL_TIB_SIZE;
478 max = tib_size / size;
479 }
480
481 tib = (gdb_byte *) alloca (tib_size);
482
483 if (target_get_tib_address (ptid, &thread_local_base) == 0)
484 {
485 printf_filtered (_("Unable to get thread local base for %s\n"),
486 target_pid_to_str (ptid).c_str ());
487 return -1;
488 }
489
490 if (target_read (current_inferior ()->top_target (), TARGET_OBJECT_MEMORY,
491 NULL, tib, thread_local_base, tib_size) != tib_size)
492 {
493 printf_filtered (_("Unable to read thread information "
494 "block for %s at address %s\n"),
495 target_pid_to_str (ptid).c_str (),
496 paddress (target_gdbarch (), thread_local_base));
497 return -1;
498 }
499
500 printf_filtered (_("Thread Information Block %s at %s\n"),
501 target_pid_to_str (ptid).c_str (),
502 paddress (target_gdbarch (), thread_local_base));
503
504 index = (gdb_byte *) tib;
505
506 /* All fields have the size of a pointer, this allows to iterate
507 using the same for loop for both layouts. */
508 for (i = 0; i < max; i++)
509 {
510 val = extract_unsigned_integer (index, size, byte_order);
511 if (i < max_name)
512 printf_filtered (_("%s is 0x%s\n"), TIB_NAME[i], phex (val, size));
513 else if (val != 0)
514 printf_filtered (_("TIB[0x%s] is 0x%s\n"), phex (i * size, 2),
515 phex (val, size));
516 index += size;
517 }
518 return 1;
519 }
520
521 /* Display thread information block of the current thread. */
522
523 static void
display_tib(const char * args,int from_tty)524 display_tib (const char * args, int from_tty)
525 {
526 if (inferior_ptid != null_ptid)
527 display_one_tib (inferior_ptid);
528 }
529
530 void
windows_xfer_shared_library(const char * so_name,CORE_ADDR load_addr,CORE_ADDR * text_offset_cached,struct gdbarch * gdbarch,struct obstack * obstack)531 windows_xfer_shared_library (const char* so_name, CORE_ADDR load_addr,
532 CORE_ADDR *text_offset_cached,
533 struct gdbarch *gdbarch, struct obstack *obstack)
534 {
535 CORE_ADDR text_offset = text_offset_cached ? *text_offset_cached : 0;
536
537 obstack_grow_str (obstack, "<library name=\"");
538 std::string p = xml_escape_text (so_name);
539 obstack_grow_str (obstack, p.c_str ());
540 obstack_grow_str (obstack, "\"><segment address=\"");
541
542 if (!text_offset)
543 {
544 gdb_bfd_ref_ptr dll (gdb_bfd_open (so_name, gnutarget));
545 /* The following calls are OK even if dll is NULL.
546 The default value 0x1000 is returned by pe_text_section_offset
547 in that case. */
548 text_offset = pe_text_section_offset (dll.get ());
549 if (text_offset_cached)
550 *text_offset_cached = text_offset;
551 }
552
553 obstack_grow_str (obstack, paddress (gdbarch, load_addr + text_offset));
554 obstack_grow_str (obstack, "\"/></library>");
555 }
556
557 /* Implement the "iterate_over_objfiles_in_search_order" gdbarch
558 method. It searches all objfiles, starting with CURRENT_OBJFILE
559 first (if not NULL).
560
561 On Windows, the system behaves a little differently when two
562 objfiles each define a global symbol using the same name, compared
563 to other platforms such as GNU/Linux for instance. On GNU/Linux,
564 all instances of the symbol effectively get merged into a single
565 one, but on Windows, they remain distinct.
566
567 As a result, it usually makes sense to start global symbol searches
568 with the current objfile before expanding it to all other objfiles.
569 This helps for instance when a user debugs some code in a DLL that
570 refers to a global variable defined inside that DLL. When trying
571 to print the value of that global variable, it would be unhelpful
572 to print the value of another global variable defined with the same
573 name, but in a different DLL. */
574
575 static void
windows_iterate_over_objfiles_in_search_order(struct gdbarch * gdbarch,iterate_over_objfiles_in_search_order_cb_ftype * cb,void * cb_data,struct objfile * current_objfile)576 windows_iterate_over_objfiles_in_search_order
577 (struct gdbarch *gdbarch,
578 iterate_over_objfiles_in_search_order_cb_ftype *cb,
579 void *cb_data, struct objfile *current_objfile)
580 {
581 int stop;
582
583 if (current_objfile)
584 {
585 stop = cb (current_objfile, cb_data);
586 if (stop)
587 return;
588 }
589
590 for (objfile *objfile : current_program_space->objfiles ())
591 {
592 if (objfile != current_objfile)
593 {
594 stop = cb (objfile, cb_data);
595 if (stop)
596 return;
597 }
598 }
599 }
600
601 static void
show_maint_show_all_tib(struct ui_file * file,int from_tty,struct cmd_list_element * c,const char * value)602 show_maint_show_all_tib (struct ui_file *file, int from_tty,
603 struct cmd_list_element *c, const char *value)
604 {
605 fprintf_filtered (file, _("Show all non-zero elements of "
606 "Thread Information Block is %s.\n"), value);
607 }
608
609
610 static int w32_prefix_command_valid = 0;
611 void
init_w32_command_list(void)612 init_w32_command_list (void)
613 {
614 if (!w32_prefix_command_valid)
615 {
616 add_basic_prefix_cmd
617 ("w32", class_info,
618 _("Print information specific to Win32 debugging."),
619 &info_w32_cmdlist, 0, &infolist);
620 w32_prefix_command_valid = 1;
621 }
622 }
623
624 /* Implementation of `gdbarch_gdb_signal_to_target' for Windows. */
625
626 static int
windows_gdb_signal_to_target(struct gdbarch * gdbarch,enum gdb_signal signal)627 windows_gdb_signal_to_target (struct gdbarch *gdbarch, enum gdb_signal signal)
628 {
629 switch (signal)
630 {
631 case GDB_SIGNAL_0:
632 return 0;
633 case GDB_SIGNAL_HUP:
634 return WINDOWS_SIGHUP;
635 case GDB_SIGNAL_INT:
636 return WINDOWS_SIGINT;
637 case GDB_SIGNAL_QUIT:
638 return WINDOWS_SIGQUIT;
639 case GDB_SIGNAL_ILL:
640 return WINDOWS_SIGILL;
641 case GDB_SIGNAL_TRAP:
642 return WINDOWS_SIGTRAP;
643 case GDB_SIGNAL_ABRT:
644 return WINDOWS_SIGABRT;
645 case GDB_SIGNAL_EMT:
646 return WINDOWS_SIGEMT;
647 case GDB_SIGNAL_FPE:
648 return WINDOWS_SIGFPE;
649 case GDB_SIGNAL_KILL:
650 return WINDOWS_SIGKILL;
651 case GDB_SIGNAL_BUS:
652 return WINDOWS_SIGBUS;
653 case GDB_SIGNAL_SEGV:
654 return WINDOWS_SIGSEGV;
655 case GDB_SIGNAL_SYS:
656 return WINDOWS_SIGSYS;
657 case GDB_SIGNAL_PIPE:
658 return WINDOWS_SIGPIPE;
659 case GDB_SIGNAL_ALRM:
660 return WINDOWS_SIGALRM;
661 case GDB_SIGNAL_TERM:
662 return WINDOWS_SIGTERM;
663 }
664 return -1;
665 }
666
667 /* Implementation of `gdbarch_gdb_signal_to_target' for Cygwin. */
668
669 static int
cygwin_gdb_signal_to_target(struct gdbarch * gdbarch,enum gdb_signal signal)670 cygwin_gdb_signal_to_target (struct gdbarch *gdbarch, enum gdb_signal signal)
671 {
672 switch (signal)
673 {
674 case GDB_SIGNAL_0:
675 return 0;
676 case GDB_SIGNAL_HUP:
677 return CYGWIN_SIGHUP;
678 case GDB_SIGNAL_INT:
679 return CYGWIN_SIGINT;
680 case GDB_SIGNAL_QUIT:
681 return CYGWIN_SIGQUIT;
682 case GDB_SIGNAL_ILL:
683 return CYGWIN_SIGILL;
684 case GDB_SIGNAL_TRAP:
685 return CYGWIN_SIGTRAP;
686 case GDB_SIGNAL_ABRT:
687 return CYGWIN_SIGABRT;
688 case GDB_SIGNAL_EMT:
689 return CYGWIN_SIGEMT;
690 case GDB_SIGNAL_FPE:
691 return CYGWIN_SIGFPE;
692 case GDB_SIGNAL_KILL:
693 return CYGWIN_SIGKILL;
694 case GDB_SIGNAL_BUS:
695 return CYGWIN_SIGBUS;
696 case GDB_SIGNAL_SEGV:
697 return CYGWIN_SIGSEGV;
698 case GDB_SIGNAL_SYS:
699 return CYGWIN_SIGSYS;
700 case GDB_SIGNAL_PIPE:
701 return CYGWIN_SIGPIPE;
702 case GDB_SIGNAL_ALRM:
703 return CYGWIN_SIGALRM;
704 case GDB_SIGNAL_TERM:
705 return CYGWIN_SIGTERM;
706 case GDB_SIGNAL_URG:
707 return CYGWIN_SIGURG;
708 case GDB_SIGNAL_STOP:
709 return CYGWIN_SIGSTOP;
710 case GDB_SIGNAL_TSTP:
711 return CYGWIN_SIGTSTP;
712 case GDB_SIGNAL_CONT:
713 return CYGWIN_SIGCONT;
714 case GDB_SIGNAL_CHLD:
715 return CYGWIN_SIGCHLD;
716 case GDB_SIGNAL_TTIN:
717 return CYGWIN_SIGTTIN;
718 case GDB_SIGNAL_TTOU:
719 return CYGWIN_SIGTTOU;
720 case GDB_SIGNAL_IO:
721 return CYGWIN_SIGIO;
722 case GDB_SIGNAL_XCPU:
723 return CYGWIN_SIGXCPU;
724 case GDB_SIGNAL_XFSZ:
725 return CYGWIN_SIGXFSZ;
726 case GDB_SIGNAL_VTALRM:
727 return CYGWIN_SIGVTALRM;
728 case GDB_SIGNAL_PROF:
729 return CYGWIN_SIGPROF;
730 case GDB_SIGNAL_WINCH:
731 return CYGWIN_SIGWINCH;
732 case GDB_SIGNAL_PWR:
733 return CYGWIN_SIGLOST;
734 case GDB_SIGNAL_USR1:
735 return CYGWIN_SIGUSR1;
736 case GDB_SIGNAL_USR2:
737 return CYGWIN_SIGUSR2;
738 }
739 return -1;
740 }
741
742 struct enum_value_name
743 {
744 uint32_t value;
745 const char *name;
746 };
747
748 /* Allocate a TYPE_CODE_ENUM type structure with its named values. */
749
750 static struct type *
create_enum(struct gdbarch * gdbarch,int bit,const char * name,const struct enum_value_name * values,int count)751 create_enum (struct gdbarch *gdbarch, int bit, const char *name,
752 const struct enum_value_name *values, int count)
753 {
754 struct type *type;
755 int i;
756
757 type = arch_type (gdbarch, TYPE_CODE_ENUM, bit, name);
758 type->set_num_fields (count);
759 type->set_fields
760 ((struct field *) TYPE_ZALLOC (type, sizeof (struct field) * count));
761 type->set_is_unsigned (true);
762
763 for (i = 0; i < count; i++)
764 {
765 TYPE_FIELD_NAME (type, i) = values[i].name;
766 SET_FIELD_ENUMVAL (type->field (i), values[i].value);
767 }
768
769 return type;
770 }
771
772 static const struct enum_value_name exception_values[] =
773 {
774 { 0x40000015, "FATAL_APP_EXIT" },
775 { 0x4000001E, "WX86_SINGLE_STEP" },
776 { 0x4000001F, "WX86_BREAKPOINT" },
777 { 0x40010005, "DBG_CONTROL_C" },
778 { 0x40010008, "DBG_CONTROL_BREAK" },
779 { 0x80000002, "DATATYPE_MISALIGNMENT" },
780 { 0x80000003, "BREAKPOINT" },
781 { 0x80000004, "SINGLE_STEP" },
782 { 0xC0000005, "ACCESS_VIOLATION" },
783 { 0xC0000006, "IN_PAGE_ERROR" },
784 { 0xC000001D, "ILLEGAL_INSTRUCTION" },
785 { 0xC0000025, "NONCONTINUABLE_EXCEPTION" },
786 { 0xC0000026, "INVALID_DISPOSITION" },
787 { 0xC000008C, "ARRAY_BOUNDS_EXCEEDED" },
788 { 0xC000008D, "FLOAT_DENORMAL_OPERAND" },
789 { 0xC000008E, "FLOAT_DIVIDE_BY_ZERO" },
790 { 0xC000008F, "FLOAT_INEXACT_RESULT" },
791 { 0xC0000090, "FLOAT_INVALID_OPERATION" },
792 { 0xC0000091, "FLOAT_OVERFLOW" },
793 { 0xC0000092, "FLOAT_STACK_CHECK" },
794 { 0xC0000093, "FLOAT_UNDERFLOW" },
795 { 0xC0000094, "INTEGER_DIVIDE_BY_ZERO" },
796 { 0xC0000095, "INTEGER_OVERFLOW" },
797 { 0xC0000096, "PRIV_INSTRUCTION" },
798 { 0xC00000FD, "STACK_OVERFLOW" },
799 { 0xC0000409, "FAST_FAIL" },
800 };
801
802 static const struct enum_value_name violation_values[] =
803 {
804 { 0, "READ_ACCESS_VIOLATION" },
805 { 1, "WRITE_ACCESS_VIOLATION" },
806 { 8, "DATA_EXECUTION_PREVENTION_VIOLATION" },
807 };
808
809 /* Implement the "get_siginfo_type" gdbarch method. */
810
811 static struct type *
windows_get_siginfo_type(struct gdbarch * gdbarch)812 windows_get_siginfo_type (struct gdbarch *gdbarch)
813 {
814 struct windows_gdbarch_data *windows_gdbarch_data;
815 struct type *dword_type, *pvoid_type, *ulongptr_type;
816 struct type *code_enum, *violation_enum;
817 struct type *violation_type, *para_type, *siginfo_ptr_type, *siginfo_type;
818
819 windows_gdbarch_data = get_windows_gdbarch_data (gdbarch);
820 if (windows_gdbarch_data->siginfo_type != NULL)
821 return windows_gdbarch_data->siginfo_type;
822
823 dword_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
824 1, "DWORD");
825 pvoid_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch), "PVOID",
826 builtin_type (gdbarch)->builtin_void);
827 ulongptr_type = arch_integer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
828 1, "ULONG_PTR");
829
830 /* ExceptionCode value names */
831 code_enum = create_enum (gdbarch, gdbarch_int_bit (gdbarch),
832 "ExceptionCode", exception_values,
833 ARRAY_SIZE (exception_values));
834
835 /* ACCESS_VIOLATION type names */
836 violation_enum = create_enum (gdbarch, gdbarch_ptr_bit (gdbarch),
837 "ViolationType", violation_values,
838 ARRAY_SIZE (violation_values));
839
840 /* ACCESS_VIOLATION information */
841 violation_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
842 append_composite_type_field (violation_type, "Type", violation_enum);
843 append_composite_type_field (violation_type, "Address", pvoid_type);
844
845 /* Unnamed union of the documented field ExceptionInformation,
846 and the alternative AccessViolationInformation (which displays
847 human-readable values for ExceptionCode ACCESS_VIOLATION). */
848 para_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
849 append_composite_type_field (para_type, "ExceptionInformation",
850 lookup_array_range_type (ulongptr_type, 0, 14));
851 append_composite_type_field (para_type, "AccessViolationInformation",
852 violation_type);
853
854 siginfo_type = arch_composite_type (gdbarch, "EXCEPTION_RECORD",
855 TYPE_CODE_STRUCT);
856 siginfo_ptr_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
857 NULL, siginfo_type);
858
859 /* ExceptionCode is documented as type DWORD, but here a helper
860 enum type is used instead to display a human-readable value. */
861 append_composite_type_field (siginfo_type, "ExceptionCode", code_enum);
862 append_composite_type_field (siginfo_type, "ExceptionFlags", dword_type);
863 append_composite_type_field (siginfo_type, "ExceptionRecord",
864 siginfo_ptr_type);
865 append_composite_type_field (siginfo_type, "ExceptionAddress",
866 pvoid_type);
867 append_composite_type_field (siginfo_type, "NumberParameters", dword_type);
868 /* The 64-bit variant needs some padding. */
869 append_composite_type_field_aligned (siginfo_type, "",
870 para_type, TYPE_LENGTH (ulongptr_type));
871
872 windows_gdbarch_data->siginfo_type = siginfo_type;
873
874 return siginfo_type;
875 }
876
877 /* Implement the "solib_create_inferior_hook" target_so_ops method. */
878
879 static void
windows_solib_create_inferior_hook(int from_tty)880 windows_solib_create_inferior_hook (int from_tty)
881 {
882 CORE_ADDR exec_base = 0;
883
884 /* Find base address of main executable in
885 TIB->process_environment_block->image_base_address. */
886 struct gdbarch *gdbarch = target_gdbarch ();
887 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
888 int ptr_bytes;
889 int peb_offset; /* Offset of process_environment_block in TIB. */
890 int base_offset; /* Offset of image_base_address in PEB. */
891 if (gdbarch_ptr_bit (gdbarch) == 32)
892 {
893 ptr_bytes = 4;
894 peb_offset = 48;
895 base_offset = 8;
896 }
897 else
898 {
899 ptr_bytes = 8;
900 peb_offset = 96;
901 base_offset = 16;
902 }
903 CORE_ADDR tlb;
904 gdb_byte buf[8];
905 if (target_has_execution ()
906 && target_get_tib_address (inferior_ptid, &tlb)
907 && !target_read_memory (tlb + peb_offset, buf, ptr_bytes))
908 {
909 CORE_ADDR peb = extract_unsigned_integer (buf, ptr_bytes, byte_order);
910 if (!target_read_memory (peb + base_offset, buf, ptr_bytes))
911 exec_base = extract_unsigned_integer (buf, ptr_bytes, byte_order);
912 }
913
914 /* Rebase executable if the base address changed because of ASLR. */
915 if (current_program_space->symfile_object_file != nullptr && exec_base != 0)
916 {
917 CORE_ADDR vmaddr
918 = pe_data (current_program_space->exec_bfd ())->pe_opthdr.ImageBase;
919 if (vmaddr != exec_base)
920 objfile_rebase (current_program_space->symfile_object_file,
921 exec_base - vmaddr);
922 }
923 }
924
925 static struct target_so_ops windows_so_ops;
926
927 /* Common parts for gdbarch initialization for the Windows and Cygwin OS
928 ABIs. */
929
930 static void
windows_init_abi_common(struct gdbarch_info info,struct gdbarch * gdbarch)931 windows_init_abi_common (struct gdbarch_info info, struct gdbarch *gdbarch)
932 {
933 set_gdbarch_wchar_bit (gdbarch, 16);
934 set_gdbarch_wchar_signed (gdbarch, 0);
935
936 /* Canonical paths on this target look like
937 `c:\Program Files\Foo App\mydll.dll', for example. */
938 set_gdbarch_has_dos_based_file_system (gdbarch, 1);
939
940 set_gdbarch_iterate_over_objfiles_in_search_order
941 (gdbarch, windows_iterate_over_objfiles_in_search_order);
942
943 windows_so_ops = solib_target_so_ops;
944 windows_so_ops.solib_create_inferior_hook
945 = windows_solib_create_inferior_hook;
946 set_solib_ops (gdbarch, &windows_so_ops);
947
948 set_gdbarch_get_siginfo_type (gdbarch, windows_get_siginfo_type);
949 }
950
951 /* See windows-tdep.h. */
952 void
windows_init_abi(struct gdbarch_info info,struct gdbarch * gdbarch)953 windows_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
954 {
955 windows_init_abi_common (info, gdbarch);
956 set_gdbarch_gdb_signal_to_target (gdbarch, windows_gdb_signal_to_target);
957 }
958
959 /* See windows-tdep.h. */
960
961 void
cygwin_init_abi(struct gdbarch_info info,struct gdbarch * gdbarch)962 cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
963 {
964 windows_init_abi_common (info, gdbarch);
965 set_gdbarch_gdb_signal_to_target (gdbarch, cygwin_gdb_signal_to_target);
966 }
967
968 /* Implementation of `tlb' variable. */
969
970 static const struct internalvar_funcs tlb_funcs =
971 {
972 tlb_make_value,
973 NULL,
974 NULL
975 };
976
977 /* Layout of an element of a PE's Import Directory Table. Based on:
978
979 https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#import-directory-table
980 */
981
982 struct pe_import_directory_entry
983 {
984 uint32_t import_lookup_table_rva;
985 uint32_t timestamp;
986 uint32_t forwarder_chain;
987 uint32_t name_rva;
988 uint32_t import_address_table_rva;
989 };
990
991 gdb_static_assert (sizeof (pe_import_directory_entry) == 20);
992
993 /* See windows-tdep.h. */
994
995 bool
is_linked_with_cygwin_dll(bfd * abfd)996 is_linked_with_cygwin_dll (bfd *abfd)
997 {
998 /* The list of DLLs a PE is linked to is in the .idata section. See:
999
1000 https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#the-idata-section
1001 */
1002 asection *idata_section = bfd_get_section_by_name (abfd, ".idata");
1003 if (idata_section == nullptr)
1004 return false;
1005
1006 bfd_size_type idata_section_size = bfd_section_size (idata_section);
1007 internal_extra_pe_aouthdr *pe_extra = &pe_data (abfd)->pe_opthdr;
1008 bfd_vma import_table_va = pe_extra->DataDirectory[PE_IMPORT_TABLE].VirtualAddress;
1009 bfd_vma idata_section_va = bfd_section_vma (idata_section);
1010
1011 /* The section's virtual address as reported by BFD has the image base applied,
1012 remove it. */
1013 gdb_assert (idata_section_va >= pe_extra->ImageBase);
1014 idata_section_va -= pe_extra->ImageBase;
1015
1016 bfd_vma idata_section_end_va = idata_section_va + idata_section_size;
1017
1018 /* Make sure that the import table is indeed within the .idata section's range. */
1019 if (import_table_va < idata_section_va
1020 || import_table_va >= idata_section_end_va)
1021 {
1022 warning (_("\
1023 %s: import table's virtual address (0x%" BFD_VMA_FMT "x) is outside .idata \
1024 section's range [0x%" BFD_VMA_FMT "x, 0x%" BFD_VMA_FMT "x[."),
1025 bfd_get_filename (abfd), import_table_va, idata_section_va,
1026 idata_section_end_va);
1027 return false;
1028 }
1029
1030 /* The import table starts at this offset into the .idata section. */
1031 bfd_vma import_table_offset_in_sect = import_table_va - idata_section_va;
1032
1033 /* Get the section's data. */
1034 gdb::byte_vector idata_contents;
1035 if (!gdb_bfd_get_full_section_contents (abfd, idata_section, &idata_contents))
1036 {
1037 warning (_("%s: failed to get contents of .idata section."),
1038 bfd_get_filename (abfd));
1039 return false;
1040 }
1041
1042 gdb_assert (idata_contents.size () == idata_section_size);
1043
1044 const gdb_byte *iter = idata_contents.data () + import_table_offset_in_sect;
1045 const gdb_byte *end = idata_contents.data () + idata_section_size;
1046 const pe_import_directory_entry null_dir_entry = { 0 };
1047
1048 /* Iterate through all directory entries. */
1049 while (true)
1050 {
1051 /* Is there enough space left in the section for another entry? */
1052 if (iter + sizeof (pe_import_directory_entry) > end)
1053 {
1054 warning (_("%s: unexpected end of .idata section."),
1055 bfd_get_filename (abfd));
1056 break;
1057 }
1058
1059 pe_import_directory_entry *dir_entry = (pe_import_directory_entry *) iter;
1060
1061 /* Is it the end of list marker? */
1062 if (memcmp (dir_entry, &null_dir_entry,
1063 sizeof (pe_import_directory_entry)) == 0)
1064 break;
1065
1066 bfd_vma name_va = dir_entry->name_rva;
1067
1068 /* If the name's virtual address is smaller than the section's virtual
1069 address, there's a problem. */
1070 if (name_va < idata_section_va || name_va >= idata_section_end_va)
1071 {
1072 warning (_("\
1073 %s: name's virtual address (0x%" BFD_VMA_FMT "x) is outside .idata section's \
1074 range [0x%" BFD_VMA_FMT "x, 0x%" BFD_VMA_FMT "x[."),
1075 bfd_get_filename (abfd), name_va, idata_section_va,
1076 idata_section_end_va);
1077 break;
1078 }
1079
1080 const gdb_byte *name = &idata_contents[name_va - idata_section_va];
1081
1082 /* Make sure we don't overshoot the end of the section with the
1083 streq. */
1084 if (name + sizeof (CYGWIN_DLL_NAME) <= end)
1085 {
1086 /* Finally, check if this is the dll name we are looking for. */
1087 if (streq ((const char *) name, CYGWIN_DLL_NAME))
1088 return true;
1089 }
1090
1091 iter += sizeof (pe_import_directory_entry);
1092 }
1093
1094 return false;
1095 }
1096
1097 struct cpms_data
1098 {
1099 struct gdbarch *gdbarch;
1100 struct obstack *obstack;
1101 int module_count;
1102 };
1103
1104 static void
core_process_module_section(bfd * abfd,asection * sect,void * obj)1105 core_process_module_section (bfd *abfd, asection *sect, void *obj)
1106 {
1107 struct cpms_data *data = (struct cpms_data *) obj;
1108 enum bfd_endian byte_order = gdbarch_byte_order (data->gdbarch);
1109
1110 unsigned int data_type;
1111 char *module_name;
1112 size_t module_name_size;
1113 size_t module_name_offset;
1114 CORE_ADDR base_addr;
1115
1116 gdb_byte *buf = NULL;
1117
1118 if (!startswith (sect->name, ".module"))
1119 return;
1120
1121 buf = (gdb_byte *) xmalloc (bfd_section_size (sect) + 1);
1122 if (!buf)
1123 {
1124 printf_unfiltered ("memory allocation failed for %s\n", sect->name);
1125 goto out;
1126 }
1127 if (!bfd_get_section_contents (abfd, sect,
1128 buf, 0, bfd_section_size (sect)))
1129 goto out;
1130
1131
1132
1133 /* A DWORD (data_type) followed by struct windows_core_module_info. */
1134 data_type = extract_unsigned_integer (buf, 4, byte_order);
1135
1136 if (data_type == NOTE_INFO_MODULE)
1137 {
1138 base_addr = extract_unsigned_integer (buf + 4, 4, byte_order);
1139 module_name_size = extract_unsigned_integer (buf + 8, 4, byte_order);
1140 module_name_offset = 12;
1141 }
1142 else if (data_type == NOTE_INFO_MODULE64)
1143 {
1144 base_addr = extract_unsigned_integer (buf + 4, 8, byte_order);
1145 module_name_size = extract_unsigned_integer (buf + 12, 4, byte_order);
1146 module_name_offset = 16;
1147 }
1148 else
1149 goto out;
1150
1151 if (module_name_offset + module_name_size > bfd_section_size (sect))
1152 goto out;
1153 module_name = (char *) buf + module_name_offset;
1154
1155 /* The first module is the .exe itself. */
1156 if (data->module_count != 0)
1157 windows_xfer_shared_library (module_name, base_addr,
1158 NULL, data->gdbarch, data->obstack);
1159 data->module_count++;
1160
1161 out:
1162 xfree (buf);
1163 return;
1164 }
1165
1166 ULONGEST
windows_core_xfer_shared_libraries(struct gdbarch * gdbarch,gdb_byte * readbuf,ULONGEST offset,ULONGEST len)1167 windows_core_xfer_shared_libraries (struct gdbarch *gdbarch,
1168 gdb_byte *readbuf,
1169 ULONGEST offset, ULONGEST len)
1170 {
1171 struct obstack obstack;
1172 const char *buf;
1173 ULONGEST len_avail;
1174 struct cpms_data data = { gdbarch, &obstack, 0 };
1175
1176 obstack_init (&obstack);
1177 obstack_grow_str (&obstack, "<library-list>\n");
1178 bfd_map_over_sections (core_bfd,
1179 core_process_module_section,
1180 &data);
1181 obstack_grow_str0 (&obstack, "</library-list>\n");
1182
1183 buf = (const char *) obstack_finish (&obstack);
1184 len_avail = strlen (buf);
1185 if (offset >= len_avail)
1186 return 0;
1187
1188 if (len > len_avail - offset)
1189 len = len_avail - offset;
1190 memcpy (readbuf, buf + offset, len);
1191
1192 obstack_free (&obstack, NULL);
1193 return len;
1194 }
1195
1196 /* This is how we want PTIDs from core files to be printed. */
1197
1198 std::string
windows_core_pid_to_str(struct gdbarch * gdbarch,ptid_t ptid)1199 windows_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
1200 {
1201 if (ptid.lwp () != 0)
1202 return string_printf ("Thread 0x%lx", ptid.lwp ());
1203
1204 return normal_pid_to_str (ptid);
1205 }
1206
1207 void _initialize_windows_tdep ();
1208 void
_initialize_windows_tdep()1209 _initialize_windows_tdep ()
1210 {
1211 windows_gdbarch_data_handle
1212 = gdbarch_data_register_post_init (init_windows_gdbarch_data);
1213
1214 init_w32_command_list ();
1215 cmd_list_element *info_w32_thread_information_block_cmd
1216 = add_cmd ("thread-information-block", class_info, display_tib,
1217 _("Display thread information block."),
1218 &info_w32_cmdlist);
1219 add_alias_cmd ("tib", info_w32_thread_information_block_cmd, class_info, 1,
1220 &info_w32_cmdlist);
1221
1222 add_setshow_boolean_cmd ("show-all-tib", class_maintenance,
1223 &maint_display_all_tib, _("\
1224 Set whether to display all non-zero fields of thread information block."), _("\
1225 Show whether to display all non-zero fields of thread information block."), _("\
1226 Use \"on\" to enable, \"off\" to disable.\n\
1227 If enabled, all non-zero fields of thread information block are displayed,\n\
1228 even if their meaning is unknown."),
1229 NULL,
1230 show_maint_show_all_tib,
1231 &maintenance_set_cmdlist,
1232 &maintenance_show_cmdlist);
1233
1234 /* Explicitly create without lookup, since that tries to create a
1235 value with a void typed value, and when we get here, gdbarch
1236 isn't initialized yet. At this point, we're quite sure there
1237 isn't another convenience variable of the same name. */
1238 create_internalvar_type_lazy ("_tlb", &tlb_funcs, NULL);
1239 }
1240