1 /* Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
3 This file is part of GDB.
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.
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.
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/>. */
19 #include "windows-tdep.h"
20 #include "gdb_obstack.h"
21 #include "xml-support.h"
28 #include "gdbthread.h"
30 struct cmd_list_element *info_w32_cmdlist;
32 typedef struct thread_information_block_32
34 uint32_t current_seh; /* %fs:0x0000 */
35 uint32_t current_top_of_stack; /* %fs:0x0004 */
36 uint32_t current_bottom_of_stack; /* %fs:0x0008 */
37 uint32_t sub_system_tib; /* %fs:0x000c */
38 uint32_t fiber_data; /* %fs:0x0010 */
39 uint32_t arbitrary_data_slot; /* %fs:0x0014 */
40 uint32_t linear_address_tib; /* %fs:0x0018 */
41 uint32_t environment_pointer; /* %fs:0x001c */
42 uint32_t process_id; /* %fs:0x0020 */
43 uint32_t current_thread_id; /* %fs:0x0024 */
44 uint32_t active_rpc_handle; /* %fs:0x0028 */
45 uint32_t thread_local_storage; /* %fs:0x002c */
46 uint32_t process_environment_block; /* %fs:0x0030 */
47 uint32_t last_error_number; /* %fs:0x0034 */
49 thread_information_32;
51 typedef struct thread_information_block_64
53 uint64_t current_seh; /* %gs:0x0000 */
54 uint64_t current_top_of_stack; /* %gs:0x0008 */
55 uint64_t current_bottom_of_stack; /* %gs:0x0010 */
56 uint64_t sub_system_tib; /* %gs:0x0018 */
57 uint64_t fiber_data; /* %gs:0x0020 */
58 uint64_t arbitrary_data_slot; /* %gs:0x0028 */
59 uint64_t linear_address_tib; /* %gs:0x0030 */
60 uint64_t environment_pointer; /* %gs:0x0038 */
61 uint64_t process_id; /* %gs:0x0040 */
62 uint64_t current_thread_id; /* %gs:0x0048 */
63 uint64_t active_rpc_handle; /* %gs:0x0050 */
64 uint64_t thread_local_storage; /* %gs:0x0058 */
65 uint64_t process_environment_block; /* %gs:0x0060 */
66 uint64_t last_error_number; /* %gs:0x0068 */
68 thread_information_64;
71 static const char* TIB_NAME[] =
73 " current_seh ", /* %fs:0x0000 */
74 " current_top_of_stack ", /* %fs:0x0004 */
75 " current_bottom_of_stack ", /* %fs:0x0008 */
76 " sub_system_tib ", /* %fs:0x000c */
77 " fiber_data ", /* %fs:0x0010 */
78 " arbitrary_data_slot ", /* %fs:0x0014 */
79 " linear_address_tib ", /* %fs:0x0018 */
80 " environment_pointer ", /* %fs:0x001c */
81 " process_id ", /* %fs:0x0020 */
82 " current_thread_id ", /* %fs:0x0024 */
83 " active_rpc_handle ", /* %fs:0x0028 */
84 " thread_local_storage ", /* %fs:0x002c */
85 " process_environment_block ", /* %fs:0x0030 */
86 " last_error_number " /* %fs:0x0034 */
89 static const int MAX_TIB32 = sizeof (thread_information_32) / sizeof (uint32_t);
90 static const int MAX_TIB64 = sizeof (thread_information_64) / sizeof (uint64_t);
91 static const int FULL_TIB_SIZE = 0x1000;
93 static int maint_display_all_tib = 0;
95 /* Define Thread Local Base pointer type. */
98 windows_get_tlb_type (struct gdbarch *gdbarch)
100 struct type *dword_ptr_type, *dword32_type, *void_ptr_type;
101 struct type *peb_ldr_type, *peb_ldr_ptr_type;
102 struct type *peb_type, *peb_ptr_type, *list_type, *list_ptr_type;
103 struct type *module_list_ptr_type;
104 struct type *tib_type, *seh_type, *tib_ptr_type, *seh_ptr_type;
106 dword_ptr_type = arch_integer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
108 dword32_type = arch_integer_type (gdbarch, 32,
110 void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void);
114 list_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
115 TYPE_NAME (list_type) = xstrdup ("list");
117 list_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
118 TYPE_LENGTH (void_ptr_type), NULL);
120 module_list_ptr_type = void_ptr_type;
122 append_composite_type_field (list_type, "forward_list", module_list_ptr_type);
123 append_composite_type_field (list_type, "backward_list",
124 module_list_ptr_type);
126 /* Structured Exception Handler */
128 seh_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
129 TYPE_NAME (seh_type) = xstrdup ("seh");
131 seh_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
132 TYPE_LENGTH (void_ptr_type), NULL);
133 TYPE_TARGET_TYPE (seh_ptr_type) = seh_type;
135 append_composite_type_field (seh_type, "next_seh", seh_ptr_type);
136 append_composite_type_field (seh_type, "handler", void_ptr_type);
138 /* struct _PEB_LDR_DATA */
139 peb_ldr_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
140 TYPE_NAME (peb_ldr_type) = xstrdup ("peb_ldr_data");
142 append_composite_type_field (peb_ldr_type, "length", dword32_type);
143 append_composite_type_field (peb_ldr_type, "initialized", dword32_type);
144 append_composite_type_field (peb_ldr_type, "ss_handle", void_ptr_type);
145 append_composite_type_field (peb_ldr_type, "in_load_order", list_type);
146 append_composite_type_field (peb_ldr_type, "in_memory_order", list_type);
147 append_composite_type_field (peb_ldr_type, "in_init_order", list_type);
148 append_composite_type_field (peb_ldr_type, "entry_in_progress",
150 peb_ldr_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
151 TYPE_LENGTH (void_ptr_type), NULL);
152 TYPE_TARGET_TYPE (peb_ldr_ptr_type) = peb_ldr_type;
155 /* struct process environment block */
156 peb_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
157 TYPE_NAME (peb_type) = xstrdup ("peb");
159 /* First bytes contain several flags. */
160 append_composite_type_field (peb_type, "flags", dword_ptr_type);
161 append_composite_type_field (peb_type, "mutant", void_ptr_type);
162 append_composite_type_field (peb_type, "image_base_address", void_ptr_type);
163 append_composite_type_field (peb_type, "ldr", peb_ldr_ptr_type);
164 append_composite_type_field (peb_type, "process_parameters", void_ptr_type);
165 append_composite_type_field (peb_type, "sub_system_data", void_ptr_type);
166 append_composite_type_field (peb_type, "process_heap", void_ptr_type);
167 append_composite_type_field (peb_type, "fast_peb_lock", void_ptr_type);
168 peb_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
169 TYPE_LENGTH (void_ptr_type), NULL);
170 TYPE_TARGET_TYPE (peb_ptr_type) = peb_type;
173 /* struct thread information block */
174 tib_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
175 TYPE_NAME (tib_type) = xstrdup ("tib");
177 /* uint32_t current_seh; %fs:0x0000 */
178 append_composite_type_field (tib_type, "current_seh", seh_ptr_type);
179 /* uint32_t current_top_of_stack; %fs:0x0004 */
180 append_composite_type_field (tib_type, "current_top_of_stack", void_ptr_type);
181 /* uint32_t current_bottom_of_stack; %fs:0x0008 */
182 append_composite_type_field (tib_type, "current_bottom_of_stack",
184 /* uint32_t sub_system_tib; %fs:0x000c */
185 append_composite_type_field (tib_type, "sub_system_tib", void_ptr_type);
187 /* uint32_t fiber_data; %fs:0x0010 */
188 append_composite_type_field (tib_type, "fiber_data", void_ptr_type);
189 /* uint32_t arbitrary_data_slot; %fs:0x0014 */
190 append_composite_type_field (tib_type, "arbitrary_data_slot", void_ptr_type);
191 /* uint32_t linear_address_tib; %fs:0x0018 */
192 append_composite_type_field (tib_type, "linear_address_tib", void_ptr_type);
193 /* uint32_t environment_pointer; %fs:0x001c */
194 append_composite_type_field (tib_type, "environment_pointer", void_ptr_type);
195 /* uint32_t process_id; %fs:0x0020 */
196 append_composite_type_field (tib_type, "process_id", dword_ptr_type);
197 /* uint32_t current_thread_id; %fs:0x0024 */
198 append_composite_type_field (tib_type, "thread_id", dword_ptr_type);
199 /* uint32_t active_rpc_handle; %fs:0x0028 */
200 append_composite_type_field (tib_type, "active_rpc_handle", dword_ptr_type);
201 /* uint32_t thread_local_storage; %fs:0x002c */
202 append_composite_type_field (tib_type, "thread_local_storage", void_ptr_type);
203 /* uint32_t process_environment_block; %fs:0x0030 */
204 append_composite_type_field (tib_type, "process_environment_block",
206 /* uint32_t last_error_number; %fs:0x0034 */
207 append_composite_type_field (tib_type, "last_error_number", dword_ptr_type);
209 tib_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
210 TYPE_LENGTH (void_ptr_type), NULL);
211 TYPE_TARGET_TYPE (tib_ptr_type) = tib_type;
216 /* The $_tlb convenience variable is a bit special. We don't know
217 for sure the type of the value until we actually have a chance to
218 fetch the data. The type can change depending on gdbarch, so it is
219 also dependent on which thread you have selected. */
221 /* This function implements the lval_computed support for reading a
225 tlb_value_read (struct value *val)
228 struct type *type = check_typedef (value_type (val));
230 if (!target_get_tib_address (inferior_ptid, &tlb))
231 error (_("Unable to read tlb"));
232 store_typed_address (value_contents_raw (val), type, tlb);
235 /* This function implements the lval_computed support for writing a
239 tlb_value_write (struct value *v, struct value *fromval)
241 error (_("Impossible to change the Thread Local Base"));
244 static struct lval_funcs tlb_value_funcs =
251 /* Return a new value with the correct type for the tlb object of
252 the current thread using architecture GDBARCH. Return a void value
253 if there's no object available. */
255 static struct value *
256 tlb_make_value (struct gdbarch *gdbarch, struct internalvar *var)
258 if (target_has_stack && !ptid_equal (inferior_ptid, null_ptid))
260 struct type *type = windows_get_tlb_type (gdbarch);
261 return allocate_computed_value (type, &tlb_value_funcs, NULL);
264 return allocate_value (builtin_type (gdbarch)->builtin_void);
268 /* Display thread information block of a given thread. */
271 display_one_tib (ptid_t ptid)
273 gdb_byte *tib = NULL;
275 CORE_ADDR thread_local_base;
276 ULONGEST i, val, max, max_name, size, tib_size;
277 ULONGEST sizeof_ptr = gdbarch_ptr_bit (target_gdbarch);
278 enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
280 if (sizeof_ptr == 64)
282 size = sizeof (uint64_t);
283 tib_size = sizeof (thread_information_64);
288 size = sizeof (uint32_t);
289 tib_size = sizeof (thread_information_32);
295 if (maint_display_all_tib)
297 tib_size = FULL_TIB_SIZE;
298 max = tib_size / size;
301 tib = alloca (tib_size);
303 if (target_get_tib_address (ptid, &thread_local_base) == 0)
305 printf_filtered (_("Unable to get thread local base for %s\n"),
306 target_pid_to_str (ptid));
310 if (target_read (¤t_target, TARGET_OBJECT_MEMORY,
311 NULL, tib, thread_local_base, tib_size) != tib_size)
313 printf_filtered (_("Unable to read thread information block for %s at \
315 target_pid_to_str (ptid),
316 paddress (target_gdbarch, thread_local_base));
320 printf_filtered (_("Thread Information Block %s at %s\n"),
321 target_pid_to_str (ptid),
322 paddress (target_gdbarch, thread_local_base));
324 index = (gdb_byte *) tib;
326 /* All fields have the size of a pointer, this allows to iterate
327 using the same for loop for both layouts. */
328 for (i = 0; i < max; i++)
330 val = extract_unsigned_integer (index, size, byte_order);
332 printf_filtered (_("%s is 0x%s\n"), TIB_NAME[i], phex (val, size));
334 printf_filtered (_("TIB[0x%s] is 0x%s\n"), phex (i * size, 2),
341 /* Display thread information block of a thread specified by ARGS.
342 If ARGS is empty, display thread information block of current_thread
343 if current_thread is non NULL.
344 Otherwise ARGS is parsed and converted to a integer that should
345 be the windows ThreadID (not the internal GDB thread ID). */
348 display_tib (char * args, int from_tty)
352 struct thread_info *tp;
353 int gdb_id = value_as_long (parse_and_eval (args));
355 tp = find_thread_id (gdb_id);
358 error (_("Thread ID %d not known."), gdb_id);
360 if (!target_thread_alive (tp->ptid))
361 error (_("Thread ID %d has terminated."), gdb_id);
363 display_one_tib (tp->ptid);
365 else if (!ptid_equal (inferior_ptid, null_ptid))
366 display_one_tib (inferior_ptid);
370 windows_xfer_shared_library (const char* so_name, CORE_ADDR load_addr,
371 struct gdbarch *gdbarch, struct obstack *obstack)
374 obstack_grow_str (obstack, "<library name=\"");
375 p = xml_escape_text (so_name);
376 obstack_grow_str (obstack, p);
378 obstack_grow_str (obstack, "\"><segment address=\"");
379 /* The symbols in a dll are offset by 0x1000, which is the the
380 offset from 0 of the first byte in an image - because of the file
381 header and the section alignment. */
382 obstack_grow_str (obstack, paddress (gdbarch, load_addr + 0x1000));
383 obstack_grow_str (obstack, "\"/></library>");
387 show_maint_show_all_tib (struct ui_file *file, int from_tty,
388 struct cmd_list_element *c, const char *value)
390 fprintf_filtered (file, _("Show all non-zero elements of Thread Information \
391 Block is %s.\n"), value);
395 info_w32_command (char *args, int from_tty)
397 help_list (info_w32_cmdlist, "info w32 ", class_info, gdb_stdout);
400 static int w32_prefix_command_valid = 0;
402 init_w32_command_list (void)
404 if (!w32_prefix_command_valid)
406 add_prefix_cmd ("w32", class_info, info_w32_command,
407 _("Print information specific to Win32 debugging."),
408 &info_w32_cmdlist, "info w32 ", 0, &infolist);
409 w32_prefix_command_valid = 1;
414 _initialize_windows_tdep (void)
416 init_w32_command_list ();
417 add_cmd ("thread-information-block", class_info, display_tib,
418 _("Display thread information block."),
420 add_alias_cmd ("tib", "thread-information-block", class_info, 1,
423 add_setshow_boolean_cmd ("show-all-tib", class_maintenance,
424 &maint_display_all_tib, _("\
425 Set whether to display all non-zero fields of thread information block."), _("\
426 Show whether to display all non-zero fields of thread information block."), _("\
427 Use \"on\" to enable, \"off\" to disable.\n\
428 If enabled, all non-zero fields of thread information block are displayed,\n\
429 even if their meaning is unknown."),
431 show_maint_show_all_tib,
432 &maintenance_set_cmdlist,
433 &maintenance_show_cmdlist);
435 /* Explicitly create without lookup, since that tries to create a
436 value with a void typed value, and when we get here, gdbarch
437 isn't initialized yet. At this point, we're quite sure there
438 isn't another convenience variable of the same name. */
439 create_internalvar_type_lazy ("_tlb", tlb_make_value);