1 /* Copyright (C) 2008-2012 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
=
90 sizeof (thread_information_32
) / sizeof (uint32_t);
91 static const int MAX_TIB64
=
92 sizeof (thread_information_64
) / sizeof (uint64_t);
93 static const int FULL_TIB_SIZE
= 0x1000;
95 static int maint_display_all_tib
= 0;
97 /* Define Thread Local Base pointer type. */
100 windows_get_tlb_type (struct gdbarch
*gdbarch
)
102 static struct gdbarch
*last_gdbarch
= NULL
;
103 static struct type
*last_tlb_type
= NULL
;
104 struct type
*dword_ptr_type
, *dword32_type
, *void_ptr_type
;
105 struct type
*peb_ldr_type
, *peb_ldr_ptr_type
;
106 struct type
*peb_type
, *peb_ptr_type
, *list_type
, *list_ptr_type
;
107 struct type
*module_list_ptr_type
;
108 struct type
*tib_type
, *seh_type
, *tib_ptr_type
, *seh_ptr_type
;
110 /* Do not rebuild type if same gdbarch as last time. */
111 if (last_tlb_type
&& last_gdbarch
== gdbarch
)
112 return last_tlb_type
;
114 dword_ptr_type
= arch_integer_type (gdbarch
, gdbarch_ptr_bit (gdbarch
),
116 dword32_type
= arch_integer_type (gdbarch
, 32,
118 void_ptr_type
= lookup_pointer_type (builtin_type (gdbarch
)->builtin_void
);
122 list_type
= arch_composite_type (gdbarch
, NULL
, TYPE_CODE_STRUCT
);
123 TYPE_NAME (list_type
) = xstrdup ("list");
125 list_ptr_type
= arch_type (gdbarch
, TYPE_CODE_PTR
,
126 TYPE_LENGTH (void_ptr_type
), NULL
);
128 module_list_ptr_type
= void_ptr_type
;
130 append_composite_type_field (list_type
, "forward_list",
131 module_list_ptr_type
);
132 append_composite_type_field (list_type
, "backward_list",
133 module_list_ptr_type
);
135 /* Structured Exception Handler */
137 seh_type
= arch_composite_type (gdbarch
, NULL
, TYPE_CODE_STRUCT
);
138 TYPE_NAME (seh_type
) = xstrdup ("seh");
140 seh_ptr_type
= arch_type (gdbarch
, TYPE_CODE_PTR
,
141 TYPE_LENGTH (void_ptr_type
), NULL
);
142 TYPE_TARGET_TYPE (seh_ptr_type
) = seh_type
;
144 append_composite_type_field (seh_type
, "next_seh", seh_ptr_type
);
145 append_composite_type_field (seh_type
, "handler",
146 builtin_type (gdbarch
)->builtin_func_ptr
);
148 /* struct _PEB_LDR_DATA */
149 peb_ldr_type
= arch_composite_type (gdbarch
, NULL
, TYPE_CODE_STRUCT
);
150 TYPE_NAME (peb_ldr_type
) = xstrdup ("peb_ldr_data");
152 append_composite_type_field (peb_ldr_type
, "length", dword32_type
);
153 append_composite_type_field (peb_ldr_type
, "initialized", dword32_type
);
154 append_composite_type_field (peb_ldr_type
, "ss_handle", void_ptr_type
);
155 append_composite_type_field (peb_ldr_type
, "in_load_order", list_type
);
156 append_composite_type_field (peb_ldr_type
, "in_memory_order", list_type
);
157 append_composite_type_field (peb_ldr_type
, "in_init_order", list_type
);
158 append_composite_type_field (peb_ldr_type
, "entry_in_progress",
160 peb_ldr_ptr_type
= arch_type (gdbarch
, TYPE_CODE_PTR
,
161 TYPE_LENGTH (void_ptr_type
), NULL
);
162 TYPE_TARGET_TYPE (peb_ldr_ptr_type
) = peb_ldr_type
;
165 /* struct process environment block */
166 peb_type
= arch_composite_type (gdbarch
, NULL
, TYPE_CODE_STRUCT
);
167 TYPE_NAME (peb_type
) = xstrdup ("peb");
169 /* First bytes contain several flags. */
170 append_composite_type_field (peb_type
, "flags", dword_ptr_type
);
171 append_composite_type_field (peb_type
, "mutant", void_ptr_type
);
172 append_composite_type_field (peb_type
, "image_base_address", void_ptr_type
);
173 append_composite_type_field (peb_type
, "ldr", peb_ldr_ptr_type
);
174 append_composite_type_field (peb_type
, "process_parameters", void_ptr_type
);
175 append_composite_type_field (peb_type
, "sub_system_data", void_ptr_type
);
176 append_composite_type_field (peb_type
, "process_heap", void_ptr_type
);
177 append_composite_type_field (peb_type
, "fast_peb_lock", void_ptr_type
);
178 peb_ptr_type
= arch_type (gdbarch
, TYPE_CODE_PTR
,
179 TYPE_LENGTH (void_ptr_type
), NULL
);
180 TYPE_TARGET_TYPE (peb_ptr_type
) = peb_type
;
183 /* struct thread information block */
184 tib_type
= arch_composite_type (gdbarch
, NULL
, TYPE_CODE_STRUCT
);
185 TYPE_NAME (tib_type
) = xstrdup ("tib");
187 /* uint32_t current_seh; %fs:0x0000 */
188 append_composite_type_field (tib_type
, "current_seh", seh_ptr_type
);
189 /* uint32_t current_top_of_stack; %fs:0x0004 */
190 append_composite_type_field (tib_type
, "current_top_of_stack",
192 /* uint32_t current_bottom_of_stack; %fs:0x0008 */
193 append_composite_type_field (tib_type
, "current_bottom_of_stack",
195 /* uint32_t sub_system_tib; %fs:0x000c */
196 append_composite_type_field (tib_type
, "sub_system_tib", void_ptr_type
);
198 /* uint32_t fiber_data; %fs:0x0010 */
199 append_composite_type_field (tib_type
, "fiber_data", void_ptr_type
);
200 /* uint32_t arbitrary_data_slot; %fs:0x0014 */
201 append_composite_type_field (tib_type
, "arbitrary_data_slot", void_ptr_type
);
202 /* uint32_t linear_address_tib; %fs:0x0018 */
203 append_composite_type_field (tib_type
, "linear_address_tib", void_ptr_type
);
204 /* uint32_t environment_pointer; %fs:0x001c */
205 append_composite_type_field (tib_type
, "environment_pointer", void_ptr_type
);
206 /* uint32_t process_id; %fs:0x0020 */
207 append_composite_type_field (tib_type
, "process_id", dword_ptr_type
);
208 /* uint32_t current_thread_id; %fs:0x0024 */
209 append_composite_type_field (tib_type
, "thread_id", dword_ptr_type
);
210 /* uint32_t active_rpc_handle; %fs:0x0028 */
211 append_composite_type_field (tib_type
, "active_rpc_handle", dword_ptr_type
);
212 /* uint32_t thread_local_storage; %fs:0x002c */
213 append_composite_type_field (tib_type
, "thread_local_storage",
215 /* uint32_t process_environment_block; %fs:0x0030 */
216 append_composite_type_field (tib_type
, "process_environment_block",
218 /* uint32_t last_error_number; %fs:0x0034 */
219 append_composite_type_field (tib_type
, "last_error_number", dword_ptr_type
);
221 tib_ptr_type
= arch_type (gdbarch
, TYPE_CODE_PTR
,
222 TYPE_LENGTH (void_ptr_type
), NULL
);
223 TYPE_TARGET_TYPE (tib_ptr_type
) = tib_type
;
225 last_tlb_type
= tib_ptr_type
;
226 last_gdbarch
= gdbarch
;
231 /* The $_tlb convenience variable is a bit special. We don't know
232 for sure the type of the value until we actually have a chance to
233 fetch the data. The type can change depending on gdbarch, so it is
234 also dependent on which thread you have selected. */
236 /* This function implements the lval_computed support for reading a
240 tlb_value_read (struct value
*val
)
243 struct type
*type
= check_typedef (value_type (val
));
245 if (!target_get_tib_address (inferior_ptid
, &tlb
))
246 error (_("Unable to read tlb"));
247 store_typed_address (value_contents_raw (val
), type
, tlb
);
250 /* This function implements the lval_computed support for writing a
254 tlb_value_write (struct value
*v
, struct value
*fromval
)
256 error (_("Impossible to change the Thread Local Base"));
259 static const struct lval_funcs tlb_value_funcs
=
266 /* Return a new value with the correct type for the tlb object of
267 the current thread using architecture GDBARCH. Return a void value
268 if there's no object available. */
270 static struct value
*
271 tlb_make_value (struct gdbarch
*gdbarch
, struct internalvar
*var
)
273 if (target_has_stack
&& !ptid_equal (inferior_ptid
, null_ptid
))
275 struct type
*type
= windows_get_tlb_type (gdbarch
);
276 return allocate_computed_value (type
, &tlb_value_funcs
, NULL
);
279 return allocate_value (builtin_type (gdbarch
)->builtin_void
);
283 /* Display thread information block of a given thread. */
286 display_one_tib (ptid_t ptid
)
288 gdb_byte
*tib
= NULL
;
290 CORE_ADDR thread_local_base
;
291 ULONGEST i
, val
, max
, max_name
, size
, tib_size
;
292 ULONGEST sizeof_ptr
= gdbarch_ptr_bit (target_gdbarch
);
293 enum bfd_endian byte_order
= gdbarch_byte_order (target_gdbarch
);
295 if (sizeof_ptr
== 64)
297 size
= sizeof (uint64_t);
298 tib_size
= sizeof (thread_information_64
);
303 size
= sizeof (uint32_t);
304 tib_size
= sizeof (thread_information_32
);
310 if (maint_display_all_tib
)
312 tib_size
= FULL_TIB_SIZE
;
313 max
= tib_size
/ size
;
316 tib
= alloca (tib_size
);
318 if (target_get_tib_address (ptid
, &thread_local_base
) == 0)
320 printf_filtered (_("Unable to get thread local base for %s\n"),
321 target_pid_to_str (ptid
));
325 if (target_read (¤t_target
, TARGET_OBJECT_MEMORY
,
326 NULL
, tib
, thread_local_base
, tib_size
) != tib_size
)
328 printf_filtered (_("Unable to read thread information "
329 "block for %s at address %s\n"),
330 target_pid_to_str (ptid
),
331 paddress (target_gdbarch
, thread_local_base
));
335 printf_filtered (_("Thread Information Block %s at %s\n"),
336 target_pid_to_str (ptid
),
337 paddress (target_gdbarch
, thread_local_base
));
339 index
= (gdb_byte
*) tib
;
341 /* All fields have the size of a pointer, this allows to iterate
342 using the same for loop for both layouts. */
343 for (i
= 0; i
< max
; i
++)
345 val
= extract_unsigned_integer (index
, size
, byte_order
);
347 printf_filtered (_("%s is 0x%s\n"), TIB_NAME
[i
], phex (val
, size
));
349 printf_filtered (_("TIB[0x%s] is 0x%s\n"), phex (i
* size
, 2),
356 /* Display thread information block of a thread specified by ARGS.
357 If ARGS is empty, display thread information block of current_thread
358 if current_thread is non NULL.
359 Otherwise ARGS is parsed and converted to a integer that should
360 be the windows ThreadID (not the internal GDB thread ID). */
363 display_tib (char * args
, int from_tty
)
367 struct thread_info
*tp
;
368 int gdb_id
= value_as_long (parse_and_eval (args
));
370 tp
= find_thread_id (gdb_id
);
373 error (_("Thread ID %d not known."), gdb_id
);
375 if (!target_thread_alive (tp
->ptid
))
376 error (_("Thread ID %d has terminated."), gdb_id
);
378 display_one_tib (tp
->ptid
);
380 else if (!ptid_equal (inferior_ptid
, null_ptid
))
381 display_one_tib (inferior_ptid
);
385 windows_xfer_shared_library (const char* so_name
, CORE_ADDR load_addr
,
386 struct gdbarch
*gdbarch
, struct obstack
*obstack
)
389 obstack_grow_str (obstack
, "<library name=\"");
390 p
= xml_escape_text (so_name
);
391 obstack_grow_str (obstack
, p
);
393 obstack_grow_str (obstack
, "\"><segment address=\"");
394 /* The symbols in a dll are offset by 0x1000, which is the
395 offset from 0 of the first byte in an image - because of the file
396 header and the section alignment. */
397 obstack_grow_str (obstack
, paddress (gdbarch
, load_addr
+ 0x1000));
398 obstack_grow_str (obstack
, "\"/></library>");
402 show_maint_show_all_tib (struct ui_file
*file
, int from_tty
,
403 struct cmd_list_element
*c
, const char *value
)
405 fprintf_filtered (file
, _("Show all non-zero elements of "
406 "Thread Information Block is %s.\n"), value
);
410 info_w32_command (char *args
, int from_tty
)
412 help_list (info_w32_cmdlist
, "info w32 ", class_info
, gdb_stdout
);
415 static int w32_prefix_command_valid
= 0;
417 init_w32_command_list (void)
419 if (!w32_prefix_command_valid
)
421 add_prefix_cmd ("w32", class_info
, info_w32_command
,
422 _("Print information specific to Win32 debugging."),
423 &info_w32_cmdlist
, "info w32 ", 0, &infolist
);
424 w32_prefix_command_valid
= 1;
429 _initialize_windows_tdep (void)
431 init_w32_command_list ();
432 add_cmd ("thread-information-block", class_info
, display_tib
,
433 _("Display thread information block."),
435 add_alias_cmd ("tib", "thread-information-block", class_info
, 1,
438 add_setshow_boolean_cmd ("show-all-tib", class_maintenance
,
439 &maint_display_all_tib
, _("\
440 Set whether to display all non-zero fields of thread information block."), _("\
441 Show whether to display all non-zero fields of thread information block."), _("\
442 Use \"on\" to enable, \"off\" to disable.\n\
443 If enabled, all non-zero fields of thread information block are displayed,\n\
444 even if their meaning is unknown."),
446 show_maint_show_all_tib
,
447 &maintenance_set_cmdlist
,
448 &maintenance_show_cmdlist
);
450 /* Explicitly create without lookup, since that tries to create a
451 value with a void typed value, and when we get here, gdbarch
452 isn't initialized yet. At this point, we're quite sure there
453 isn't another convenience variable of the same name. */
454 create_internalvar_type_lazy ("_tlb", tlb_make_value
);