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",
137 builtin_type (gdbarch)->builtin_func_ptr);
139 /* struct _PEB_LDR_DATA */
140 peb_ldr_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
141 TYPE_NAME (peb_ldr_type) = xstrdup ("peb_ldr_data");
143 append_composite_type_field (peb_ldr_type, "length", dword32_type);
144 append_composite_type_field (peb_ldr_type, "initialized", dword32_type);
145 append_composite_type_field (peb_ldr_type, "ss_handle", void_ptr_type);
146 append_composite_type_field (peb_ldr_type, "in_load_order", list_type);
147 append_composite_type_field (peb_ldr_type, "in_memory_order", list_type);
148 append_composite_type_field (peb_ldr_type, "in_init_order", list_type);
149 append_composite_type_field (peb_ldr_type, "entry_in_progress",
151 peb_ldr_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
152 TYPE_LENGTH (void_ptr_type), NULL);
153 TYPE_TARGET_TYPE (peb_ldr_ptr_type) = peb_ldr_type;
156 /* struct process environment block */
157 peb_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
158 TYPE_NAME (peb_type) = xstrdup ("peb");
160 /* First bytes contain several flags. */
161 append_composite_type_field (peb_type, "flags", dword_ptr_type);
162 append_composite_type_field (peb_type, "mutant", void_ptr_type);
163 append_composite_type_field (peb_type, "image_base_address", void_ptr_type);
164 append_composite_type_field (peb_type, "ldr", peb_ldr_ptr_type);
165 append_composite_type_field (peb_type, "process_parameters", void_ptr_type);
166 append_composite_type_field (peb_type, "sub_system_data", void_ptr_type);
167 append_composite_type_field (peb_type, "process_heap", void_ptr_type);
168 append_composite_type_field (peb_type, "fast_peb_lock", void_ptr_type);
169 peb_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
170 TYPE_LENGTH (void_ptr_type), NULL);
171 TYPE_TARGET_TYPE (peb_ptr_type) = peb_type;
174 /* struct thread information block */
175 tib_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
176 TYPE_NAME (tib_type) = xstrdup ("tib");
178 /* uint32_t current_seh; %fs:0x0000 */
179 append_composite_type_field (tib_type, "current_seh", seh_ptr_type);
180 /* uint32_t current_top_of_stack; %fs:0x0004 */
181 append_composite_type_field (tib_type, "current_top_of_stack", void_ptr_type);
182 /* uint32_t current_bottom_of_stack; %fs:0x0008 */
183 append_composite_type_field (tib_type, "current_bottom_of_stack",
185 /* uint32_t sub_system_tib; %fs:0x000c */
186 append_composite_type_field (tib_type, "sub_system_tib", void_ptr_type);
188 /* uint32_t fiber_data; %fs:0x0010 */
189 append_composite_type_field (tib_type, "fiber_data", void_ptr_type);
190 /* uint32_t arbitrary_data_slot; %fs:0x0014 */
191 append_composite_type_field (tib_type, "arbitrary_data_slot", void_ptr_type);
192 /* uint32_t linear_address_tib; %fs:0x0018 */
193 append_composite_type_field (tib_type, "linear_address_tib", void_ptr_type);
194 /* uint32_t environment_pointer; %fs:0x001c */
195 append_composite_type_field (tib_type, "environment_pointer", void_ptr_type);
196 /* uint32_t process_id; %fs:0x0020 */
197 append_composite_type_field (tib_type, "process_id", dword_ptr_type);
198 /* uint32_t current_thread_id; %fs:0x0024 */
199 append_composite_type_field (tib_type, "thread_id", dword_ptr_type);
200 /* uint32_t active_rpc_handle; %fs:0x0028 */
201 append_composite_type_field (tib_type, "active_rpc_handle", dword_ptr_type);
202 /* uint32_t thread_local_storage; %fs:0x002c */
203 append_composite_type_field (tib_type, "thread_local_storage", void_ptr_type);
204 /* uint32_t process_environment_block; %fs:0x0030 */
205 append_composite_type_field (tib_type, "process_environment_block",
207 /* uint32_t last_error_number; %fs:0x0034 */
208 append_composite_type_field (tib_type, "last_error_number", dword_ptr_type);
210 tib_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
211 TYPE_LENGTH (void_ptr_type), NULL);
212 TYPE_TARGET_TYPE (tib_ptr_type) = tib_type;
217 /* The $_tlb convenience variable is a bit special. We don't know
218 for sure the type of the value until we actually have a chance to
219 fetch the data. The type can change depending on gdbarch, so it is
220 also dependent on which thread you have selected. */
222 /* This function implements the lval_computed support for reading a
226 tlb_value_read (struct value *val)
229 struct type *type = check_typedef (value_type (val));
231 if (!target_get_tib_address (inferior_ptid, &tlb))
232 error (_("Unable to read tlb"));
233 store_typed_address (value_contents_raw (val), type, tlb);
236 /* This function implements the lval_computed support for writing a
240 tlb_value_write (struct value *v, struct value *fromval)
242 error (_("Impossible to change the Thread Local Base"));
245 static struct lval_funcs tlb_value_funcs =
252 /* Return a new value with the correct type for the tlb object of
253 the current thread using architecture GDBARCH. Return a void value
254 if there's no object available. */
256 static struct value *
257 tlb_make_value (struct gdbarch *gdbarch, struct internalvar *var)
259 if (target_has_stack && !ptid_equal (inferior_ptid, null_ptid))
261 struct type *type = windows_get_tlb_type (gdbarch);
262 return allocate_computed_value (type, &tlb_value_funcs, NULL);
265 return allocate_value (builtin_type (gdbarch)->builtin_void);
269 /* Display thread information block of a given thread. */
272 display_one_tib (ptid_t ptid)
274 gdb_byte *tib = NULL;
276 CORE_ADDR thread_local_base;
277 ULONGEST i, val, max, max_name, size, tib_size;
278 ULONGEST sizeof_ptr = gdbarch_ptr_bit (target_gdbarch);
279 enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
281 if (sizeof_ptr == 64)
283 size = sizeof (uint64_t);
284 tib_size = sizeof (thread_information_64);
289 size = sizeof (uint32_t);
290 tib_size = sizeof (thread_information_32);
296 if (maint_display_all_tib)
298 tib_size = FULL_TIB_SIZE;
299 max = tib_size / size;
302 tib = alloca (tib_size);
304 if (target_get_tib_address (ptid, &thread_local_base) == 0)
306 printf_filtered (_("Unable to get thread local base for %s\n"),
307 target_pid_to_str (ptid));
311 if (target_read (¤t_target, TARGET_OBJECT_MEMORY,
312 NULL, tib, thread_local_base, tib_size) != tib_size)
314 printf_filtered (_("Unable to read thread information block for %s at \
316 target_pid_to_str (ptid),
317 paddress (target_gdbarch, thread_local_base));
321 printf_filtered (_("Thread Information Block %s at %s\n"),
322 target_pid_to_str (ptid),
323 paddress (target_gdbarch, thread_local_base));
325 index = (gdb_byte *) tib;
327 /* All fields have the size of a pointer, this allows to iterate
328 using the same for loop for both layouts. */
329 for (i = 0; i < max; i++)
331 val = extract_unsigned_integer (index, size, byte_order);
333 printf_filtered (_("%s is 0x%s\n"), TIB_NAME[i], phex (val, size));
335 printf_filtered (_("TIB[0x%s] is 0x%s\n"), phex (i * size, 2),
342 /* Display thread information block of a thread specified by ARGS.
343 If ARGS is empty, display thread information block of current_thread
344 if current_thread is non NULL.
345 Otherwise ARGS is parsed and converted to a integer that should
346 be the windows ThreadID (not the internal GDB thread ID). */
349 display_tib (char * args, int from_tty)
353 struct thread_info *tp;
354 int gdb_id = value_as_long (parse_and_eval (args));
356 tp = find_thread_id (gdb_id);
359 error (_("Thread ID %d not known."), gdb_id);
361 if (!target_thread_alive (tp->ptid))
362 error (_("Thread ID %d has terminated."), gdb_id);
364 display_one_tib (tp->ptid);
366 else if (!ptid_equal (inferior_ptid, null_ptid))
367 display_one_tib (inferior_ptid);
371 windows_xfer_shared_library (const char* so_name, CORE_ADDR load_addr,
372 struct gdbarch *gdbarch, struct obstack *obstack)
375 obstack_grow_str (obstack, "<library name=\"");
376 p = xml_escape_text (so_name);
377 obstack_grow_str (obstack, p);
379 obstack_grow_str (obstack, "\"><segment address=\"");
380 /* The symbols in a dll are offset by 0x1000, which is the the
381 offset from 0 of the first byte in an image - because of the file
382 header and the section alignment. */
383 obstack_grow_str (obstack, paddress (gdbarch, load_addr + 0x1000));
384 obstack_grow_str (obstack, "\"/></library>");
388 show_maint_show_all_tib (struct ui_file *file, int from_tty,
389 struct cmd_list_element *c, const char *value)
391 fprintf_filtered (file, _("Show all non-zero elements of Thread Information \
392 Block is %s.\n"), value);
396 info_w32_command (char *args, int from_tty)
398 help_list (info_w32_cmdlist, "info w32 ", class_info, gdb_stdout);
401 static int w32_prefix_command_valid = 0;
403 init_w32_command_list (void)
405 if (!w32_prefix_command_valid)
407 add_prefix_cmd ("w32", class_info, info_w32_command,
408 _("Print information specific to Win32 debugging."),
409 &info_w32_cmdlist, "info w32 ", 0, &infolist);
410 w32_prefix_command_valid = 1;
415 _initialize_windows_tdep (void)
417 init_w32_command_list ();
418 add_cmd ("thread-information-block", class_info, display_tib,
419 _("Display thread information block."),
421 add_alias_cmd ("tib", "thread-information-block", class_info, 1,
424 add_setshow_boolean_cmd ("show-all-tib", class_maintenance,
425 &maint_display_all_tib, _("\
426 Set whether to display all non-zero fields of thread information block."), _("\
427 Show whether to display all non-zero fields of thread information block."), _("\
428 Use \"on\" to enable, \"off\" to disable.\n\
429 If enabled, all non-zero fields of thread information block are displayed,\n\
430 even if their meaning is unknown."),
432 show_maint_show_all_tib,
433 &maintenance_set_cmdlist,
434 &maintenance_show_cmdlist);
436 /* Explicitly create without lookup, since that tries to create a
437 value with a void typed value, and when we get here, gdbarch
438 isn't initialized yet. At this point, we're quite sure there
439 isn't another convenience variable of the same name. */
440 create_internalvar_type_lazy ("_tlb", tlb_make_value);