| 1 | /* Copyright (C) 2008, 2009, 2010, 2011 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 | |
| 30 | struct cmd_list_element *info_w32_cmdlist; |
| 31 | |
| 32 | typedef struct thread_information_block_32 |
| 33 | { |
| 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 */ |
| 48 | } |
| 49 | thread_information_32; |
| 50 | |
| 51 | typedef struct thread_information_block_64 |
| 52 | { |
| 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 */ |
| 67 | } |
| 68 | thread_information_64; |
| 69 | |
| 70 | |
| 71 | static const char* TIB_NAME[] = |
| 72 | { |
| 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 */ |
| 87 | }; |
| 88 | |
| 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; |
| 94 | |
| 95 | static int maint_display_all_tib = 0; |
| 96 | |
| 97 | /* Define Thread Local Base pointer type. */ |
| 98 | |
| 99 | static struct type * |
| 100 | windows_get_tlb_type (struct gdbarch *gdbarch) |
| 101 | { |
| 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; |
| 109 | |
| 110 | /* Do not rebuild type if same gdbarch as last time. */ |
| 111 | if (last_tlb_type && last_gdbarch == gdbarch) |
| 112 | return last_tlb_type; |
| 113 | |
| 114 | dword_ptr_type = arch_integer_type (gdbarch, gdbarch_ptr_bit (gdbarch), |
| 115 | 1, "DWORD_PTR"); |
| 116 | dword32_type = arch_integer_type (gdbarch, 32, |
| 117 | 1, "DWORD32"); |
| 118 | void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void); |
| 119 | |
| 120 | /* list entry */ |
| 121 | |
| 122 | list_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
| 123 | TYPE_NAME (list_type) = xstrdup ("list"); |
| 124 | |
| 125 | list_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR, |
| 126 | TYPE_LENGTH (void_ptr_type), NULL); |
| 127 | |
| 128 | module_list_ptr_type = void_ptr_type; |
| 129 | |
| 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); |
| 134 | |
| 135 | /* Structured Exception Handler */ |
| 136 | |
| 137 | seh_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
| 138 | TYPE_NAME (seh_type) = xstrdup ("seh"); |
| 139 | |
| 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; |
| 143 | |
| 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); |
| 147 | |
| 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"); |
| 151 | |
| 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", |
| 159 | void_ptr_type); |
| 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; |
| 163 | |
| 164 | |
| 165 | /* struct process environment block */ |
| 166 | peb_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
| 167 | TYPE_NAME (peb_type) = xstrdup ("peb"); |
| 168 | |
| 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; |
| 181 | |
| 182 | |
| 183 | /* struct thread information block */ |
| 184 | tib_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
| 185 | TYPE_NAME (tib_type) = xstrdup ("tib"); |
| 186 | |
| 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", |
| 191 | void_ptr_type); |
| 192 | /* uint32_t current_bottom_of_stack; %fs:0x0008 */ |
| 193 | append_composite_type_field (tib_type, "current_bottom_of_stack", |
| 194 | void_ptr_type); |
| 195 | /* uint32_t sub_system_tib; %fs:0x000c */ |
| 196 | append_composite_type_field (tib_type, "sub_system_tib", void_ptr_type); |
| 197 | |
| 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", |
| 214 | void_ptr_type); |
| 215 | /* uint32_t process_environment_block; %fs:0x0030 */ |
| 216 | append_composite_type_field (tib_type, "process_environment_block", |
| 217 | peb_ptr_type); |
| 218 | /* uint32_t last_error_number; %fs:0x0034 */ |
| 219 | append_composite_type_field (tib_type, "last_error_number", dword_ptr_type); |
| 220 | |
| 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; |
| 224 | |
| 225 | last_tlb_type = tib_ptr_type; |
| 226 | last_gdbarch = gdbarch; |
| 227 | |
| 228 | return tib_ptr_type; |
| 229 | } |
| 230 | |
| 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. */ |
| 235 | |
| 236 | /* This function implements the lval_computed support for reading a |
| 237 | $_tlb value. */ |
| 238 | |
| 239 | static void |
| 240 | tlb_value_read (struct value *val) |
| 241 | { |
| 242 | CORE_ADDR tlb; |
| 243 | struct type *type = check_typedef (value_type (val)); |
| 244 | |
| 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); |
| 248 | } |
| 249 | |
| 250 | /* This function implements the lval_computed support for writing a |
| 251 | $_tlb value. */ |
| 252 | |
| 253 | static void |
| 254 | tlb_value_write (struct value *v, struct value *fromval) |
| 255 | { |
| 256 | error (_("Impossible to change the Thread Local Base")); |
| 257 | } |
| 258 | |
| 259 | static struct lval_funcs tlb_value_funcs = |
| 260 | { |
| 261 | tlb_value_read, |
| 262 | tlb_value_write |
| 263 | }; |
| 264 | |
| 265 | |
| 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. */ |
| 269 | |
| 270 | static struct value * |
| 271 | tlb_make_value (struct gdbarch *gdbarch, struct internalvar *var) |
| 272 | { |
| 273 | if (target_has_stack && !ptid_equal (inferior_ptid, null_ptid)) |
| 274 | { |
| 275 | struct type *type = windows_get_tlb_type (gdbarch); |
| 276 | return allocate_computed_value (type, &tlb_value_funcs, NULL); |
| 277 | } |
| 278 | |
| 279 | return allocate_value (builtin_type (gdbarch)->builtin_void); |
| 280 | } |
| 281 | |
| 282 | |
| 283 | /* Display thread information block of a given thread. */ |
| 284 | |
| 285 | static int |
| 286 | display_one_tib (ptid_t ptid) |
| 287 | { |
| 288 | gdb_byte *tib = NULL; |
| 289 | gdb_byte *index; |
| 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); |
| 294 | |
| 295 | if (sizeof_ptr == 64) |
| 296 | { |
| 297 | size = sizeof (uint64_t); |
| 298 | tib_size = sizeof (thread_information_64); |
| 299 | max = MAX_TIB64; |
| 300 | } |
| 301 | else |
| 302 | { |
| 303 | size = sizeof (uint32_t); |
| 304 | tib_size = sizeof (thread_information_32); |
| 305 | max = MAX_TIB32; |
| 306 | } |
| 307 | |
| 308 | max_name = max; |
| 309 | |
| 310 | if (maint_display_all_tib) |
| 311 | { |
| 312 | tib_size = FULL_TIB_SIZE; |
| 313 | max = tib_size / size; |
| 314 | } |
| 315 | |
| 316 | tib = alloca (tib_size); |
| 317 | |
| 318 | if (target_get_tib_address (ptid, &thread_local_base) == 0) |
| 319 | { |
| 320 | printf_filtered (_("Unable to get thread local base for %s\n"), |
| 321 | target_pid_to_str (ptid)); |
| 322 | return -1; |
| 323 | } |
| 324 | |
| 325 | if (target_read (¤t_target, TARGET_OBJECT_MEMORY, |
| 326 | NULL, tib, thread_local_base, tib_size) != tib_size) |
| 327 | { |
| 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)); |
| 332 | return -1; |
| 333 | } |
| 334 | |
| 335 | printf_filtered (_("Thread Information Block %s at %s\n"), |
| 336 | target_pid_to_str (ptid), |
| 337 | paddress (target_gdbarch, thread_local_base)); |
| 338 | |
| 339 | index = (gdb_byte *) tib; |
| 340 | |
| 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++) |
| 344 | { |
| 345 | val = extract_unsigned_integer (index, size, byte_order); |
| 346 | if (i < max_name) |
| 347 | printf_filtered (_("%s is 0x%s\n"), TIB_NAME[i], phex (val, size)); |
| 348 | else if (val != 0) |
| 349 | printf_filtered (_("TIB[0x%s] is 0x%s\n"), phex (i * size, 2), |
| 350 | phex (val, size)); |
| 351 | index += size; |
| 352 | } |
| 353 | return 1; |
| 354 | } |
| 355 | |
| 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). */ |
| 361 | |
| 362 | static void |
| 363 | display_tib (char * args, int from_tty) |
| 364 | { |
| 365 | if (args) |
| 366 | { |
| 367 | struct thread_info *tp; |
| 368 | int gdb_id = value_as_long (parse_and_eval (args)); |
| 369 | |
| 370 | tp = find_thread_id (gdb_id); |
| 371 | |
| 372 | if (!tp) |
| 373 | error (_("Thread ID %d not known."), gdb_id); |
| 374 | |
| 375 | if (!target_thread_alive (tp->ptid)) |
| 376 | error (_("Thread ID %d has terminated."), gdb_id); |
| 377 | |
| 378 | display_one_tib (tp->ptid); |
| 379 | } |
| 380 | else if (!ptid_equal (inferior_ptid, null_ptid)) |
| 381 | display_one_tib (inferior_ptid); |
| 382 | } |
| 383 | |
| 384 | void |
| 385 | windows_xfer_shared_library (const char* so_name, CORE_ADDR load_addr, |
| 386 | struct gdbarch *gdbarch, struct obstack *obstack) |
| 387 | { |
| 388 | char *p; |
| 389 | obstack_grow_str (obstack, "<library name=\""); |
| 390 | p = xml_escape_text (so_name); |
| 391 | obstack_grow_str (obstack, p); |
| 392 | xfree (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>"); |
| 399 | } |
| 400 | |
| 401 | static void |
| 402 | show_maint_show_all_tib (struct ui_file *file, int from_tty, |
| 403 | struct cmd_list_element *c, const char *value) |
| 404 | { |
| 405 | fprintf_filtered (file, _("Show all non-zero elements of " |
| 406 | "Thread Information Block is %s.\n"), value); |
| 407 | } |
| 408 | |
| 409 | static void |
| 410 | info_w32_command (char *args, int from_tty) |
| 411 | { |
| 412 | help_list (info_w32_cmdlist, "info w32 ", class_info, gdb_stdout); |
| 413 | } |
| 414 | |
| 415 | static int w32_prefix_command_valid = 0; |
| 416 | void |
| 417 | init_w32_command_list (void) |
| 418 | { |
| 419 | if (!w32_prefix_command_valid) |
| 420 | { |
| 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; |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | void |
| 429 | _initialize_windows_tdep (void) |
| 430 | { |
| 431 | init_w32_command_list (); |
| 432 | add_cmd ("thread-information-block", class_info, display_tib, |
| 433 | _("Display thread information block."), |
| 434 | &info_w32_cmdlist); |
| 435 | add_alias_cmd ("tib", "thread-information-block", class_info, 1, |
| 436 | &info_w32_cmdlist); |
| 437 | |
| 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."), |
| 445 | NULL, |
| 446 | show_maint_show_all_tib, |
| 447 | &maintenance_set_cmdlist, |
| 448 | &maintenance_show_cmdlist); |
| 449 | |
| 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); |
| 455 | } |