1 /* Copyright (C) 2008-2023 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 "gdbsupport/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 "solib.h" 34 #include "solib-target.h" 35 #include "gdbcore.h" 36 #include "coff/internal.h" 37 #include "libcoff.h" 38 #include "solist.h" 39 40 #define CYGWIN_DLL_NAME "cygwin1.dll" 41 42 /* Windows signal numbers differ between MinGW flavors and between 43 those and Cygwin. The below enumerations were gleaned from the 44 respective headers. */ 45 46 /* Signal numbers for the various MinGW flavors. The ones marked with 47 MinGW-w64 are defined by MinGW-w64, not by mingw.org's MinGW. */ 48 49 enum 50 { 51 WINDOWS_SIGHUP = 1, /* MinGW-w64 */ 52 WINDOWS_SIGINT = 2, 53 WINDOWS_SIGQUIT = 3, /* MinGW-w64 */ 54 WINDOWS_SIGILL = 4, 55 WINDOWS_SIGTRAP = 5, /* MinGW-w64 */ 56 WINDOWS_SIGIOT = 6, /* MinGW-w64 */ 57 WINDOWS_SIGEMT = 7, /* MinGW-w64 */ 58 WINDOWS_SIGFPE = 8, 59 WINDOWS_SIGKILL = 9, /* MinGW-w64 */ 60 WINDOWS_SIGBUS = 10, /* MinGW-w64 */ 61 WINDOWS_SIGSEGV = 11, 62 WINDOWS_SIGSYS = 12, /* MinGW-w64 */ 63 WINDOWS_SIGPIPE = 13, /* MinGW-w64 */ 64 WINDOWS_SIGALRM = 14, /* MinGW-w64 */ 65 WINDOWS_SIGTERM = 15, 66 WINDOWS_SIGBREAK = 21, 67 WINDOWS_SIGABRT = 22, 68 }; 69 70 /* Signal numbers for Cygwin. */ 71 72 enum 73 { 74 CYGWIN_SIGHUP = 1, 75 CYGWIN_SIGINT = 2, 76 CYGWIN_SIGQUIT = 3, 77 CYGWIN_SIGILL = 4, 78 CYGWIN_SIGTRAP = 5, 79 CYGWIN_SIGABRT = 6, 80 CYGWIN_SIGEMT = 7, 81 CYGWIN_SIGFPE = 8, 82 CYGWIN_SIGKILL = 9, 83 CYGWIN_SIGBUS = 10, 84 CYGWIN_SIGSEGV = 11, 85 CYGWIN_SIGSYS = 12, 86 CYGWIN_SIGPIPE = 13, 87 CYGWIN_SIGALRM = 14, 88 CYGWIN_SIGTERM = 15, 89 CYGWIN_SIGURG = 16, 90 CYGWIN_SIGSTOP = 17, 91 CYGWIN_SIGTSTP = 18, 92 CYGWIN_SIGCONT = 19, 93 CYGWIN_SIGCHLD = 20, 94 CYGWIN_SIGTTIN = 21, 95 CYGWIN_SIGTTOU = 22, 96 CYGWIN_SIGIO = 23, 97 CYGWIN_SIGXCPU = 24, 98 CYGWIN_SIGXFSZ = 25, 99 CYGWIN_SIGVTALRM = 26, 100 CYGWIN_SIGPROF = 27, 101 CYGWIN_SIGWINCH = 28, 102 CYGWIN_SIGLOST = 29, 103 CYGWIN_SIGUSR1 = 30, 104 CYGWIN_SIGUSR2 = 31, 105 }; 106 107 /* These constants are defined by Cygwin's core_dump.h */ 108 static constexpr unsigned int NOTE_INFO_MODULE = 3; 109 static constexpr unsigned int NOTE_INFO_MODULE64 = 4; 110 111 struct cmd_list_element *info_w32_cmdlist; 112 113 typedef struct thread_information_block_32 114 { 115 uint32_t current_seh; /* %fs:0x0000 */ 116 uint32_t current_top_of_stack; /* %fs:0x0004 */ 117 uint32_t current_bottom_of_stack; /* %fs:0x0008 */ 118 uint32_t sub_system_tib; /* %fs:0x000c */ 119 uint32_t fiber_data; /* %fs:0x0010 */ 120 uint32_t arbitrary_data_slot; /* %fs:0x0014 */ 121 uint32_t linear_address_tib; /* %fs:0x0018 */ 122 uint32_t environment_pointer; /* %fs:0x001c */ 123 uint32_t process_id; /* %fs:0x0020 */ 124 uint32_t current_thread_id; /* %fs:0x0024 */ 125 uint32_t active_rpc_handle; /* %fs:0x0028 */ 126 uint32_t thread_local_storage; /* %fs:0x002c */ 127 uint32_t process_environment_block; /* %fs:0x0030 */ 128 uint32_t last_error_number; /* %fs:0x0034 */ 129 } 130 thread_information_32; 131 132 typedef struct thread_information_block_64 133 { 134 uint64_t current_seh; /* %gs:0x0000 */ 135 uint64_t current_top_of_stack; /* %gs:0x0008 */ 136 uint64_t current_bottom_of_stack; /* %gs:0x0010 */ 137 uint64_t sub_system_tib; /* %gs:0x0018 */ 138 uint64_t fiber_data; /* %gs:0x0020 */ 139 uint64_t arbitrary_data_slot; /* %gs:0x0028 */ 140 uint64_t linear_address_tib; /* %gs:0x0030 */ 141 uint64_t environment_pointer; /* %gs:0x0038 */ 142 uint64_t process_id; /* %gs:0x0040 */ 143 uint64_t current_thread_id; /* %gs:0x0048 */ 144 uint64_t active_rpc_handle; /* %gs:0x0050 */ 145 uint64_t thread_local_storage; /* %gs:0x0058 */ 146 uint64_t process_environment_block; /* %gs:0x0060 */ 147 uint64_t last_error_number; /* %gs:0x0068 */ 148 } 149 thread_information_64; 150 151 152 static const char* TIB_NAME[] = 153 { 154 " current_seh ", /* %fs:0x0000 */ 155 " current_top_of_stack ", /* %fs:0x0004 */ 156 " current_bottom_of_stack ", /* %fs:0x0008 */ 157 " sub_system_tib ", /* %fs:0x000c */ 158 " fiber_data ", /* %fs:0x0010 */ 159 " arbitrary_data_slot ", /* %fs:0x0014 */ 160 " linear_address_tib ", /* %fs:0x0018 */ 161 " environment_pointer ", /* %fs:0x001c */ 162 " process_id ", /* %fs:0x0020 */ 163 " current_thread_id ", /* %fs:0x0024 */ 164 " active_rpc_handle ", /* %fs:0x0028 */ 165 " thread_local_storage ", /* %fs:0x002c */ 166 " process_environment_block ", /* %fs:0x0030 */ 167 " last_error_number " /* %fs:0x0034 */ 168 }; 169 170 static const int MAX_TIB32 = 171 sizeof (thread_information_32) / sizeof (uint32_t); 172 static const int MAX_TIB64 = 173 sizeof (thread_information_64) / sizeof (uint64_t); 174 static const int FULL_TIB_SIZE = 0x1000; 175 176 static bool maint_display_all_tib = false; 177 178 struct windows_gdbarch_data 179 { 180 struct type *siginfo_type = nullptr; 181 /* Type of thread information block. */ 182 struct type *tib_ptr_type = nullptr; 183 }; 184 185 static const registry<gdbarch>::key<windows_gdbarch_data> 186 windows_gdbarch_data_handle; 187 188 /* Get windows_gdbarch_data of an arch. */ 189 190 static struct windows_gdbarch_data * 191 get_windows_gdbarch_data (struct gdbarch *gdbarch) 192 { 193 windows_gdbarch_data *result = windows_gdbarch_data_handle.get (gdbarch); 194 if (result == nullptr) 195 result = windows_gdbarch_data_handle.emplace (gdbarch); 196 return result; 197 } 198 199 /* Define Thread Local Base pointer type. */ 200 201 static struct type * 202 windows_get_tlb_type (struct gdbarch *gdbarch) 203 { 204 struct type *dword_ptr_type, *dword32_type, *void_ptr_type; 205 struct type *peb_ldr_type, *peb_ldr_ptr_type; 206 struct type *peb_type, *peb_ptr_type, *list_type; 207 struct type *module_list_ptr_type; 208 struct type *tib_type, *seh_type, *tib_ptr_type, *seh_ptr_type; 209 struct type *word_type, *wchar_type, *wchar_ptr_type; 210 struct type *uni_str_type, *rupp_type, *rupp_ptr_type; 211 212 windows_gdbarch_data *windows_gdbarch_data 213 = get_windows_gdbarch_data (gdbarch); 214 if (windows_gdbarch_data->tib_ptr_type != nullptr) 215 return windows_gdbarch_data->tib_ptr_type; 216 217 dword_ptr_type = arch_integer_type (gdbarch, gdbarch_ptr_bit (gdbarch), 218 1, "DWORD_PTR"); 219 dword32_type = arch_integer_type (gdbarch, 32, 220 1, "DWORD32"); 221 word_type = arch_integer_type (gdbarch, 16, 222 1, "WORD"); 223 wchar_type = arch_integer_type (gdbarch, 16, 224 1, "wchar_t"); 225 void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void); 226 wchar_ptr_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch), 227 NULL, wchar_type); 228 229 /* list entry */ 230 231 list_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); 232 list_type->set_name (xstrdup ("list")); 233 234 module_list_ptr_type = void_ptr_type; 235 236 append_composite_type_field (list_type, "forward_list", 237 module_list_ptr_type); 238 append_composite_type_field (list_type, "backward_list", 239 module_list_ptr_type); 240 241 /* Structured Exception Handler */ 242 243 seh_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); 244 seh_type->set_name (xstrdup ("seh")); 245 246 seh_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR, 247 void_ptr_type->length () * TARGET_CHAR_BIT, 248 NULL); 249 seh_ptr_type->set_target_type (seh_type); 250 251 append_composite_type_field (seh_type, "next_seh", seh_ptr_type); 252 append_composite_type_field (seh_type, "handler", 253 builtin_type (gdbarch)->builtin_func_ptr); 254 255 /* struct _PEB_LDR_DATA */ 256 peb_ldr_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); 257 peb_ldr_type->set_name (xstrdup ("peb_ldr_data")); 258 259 append_composite_type_field (peb_ldr_type, "length", dword32_type); 260 append_composite_type_field (peb_ldr_type, "initialized", dword32_type); 261 append_composite_type_field (peb_ldr_type, "ss_handle", void_ptr_type); 262 append_composite_type_field (peb_ldr_type, "in_load_order", list_type); 263 append_composite_type_field (peb_ldr_type, "in_memory_order", list_type); 264 append_composite_type_field (peb_ldr_type, "in_init_order", list_type); 265 append_composite_type_field (peb_ldr_type, "entry_in_progress", 266 void_ptr_type); 267 peb_ldr_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR, 268 void_ptr_type->length () * TARGET_CHAR_BIT, 269 NULL); 270 peb_ldr_ptr_type->set_target_type (peb_ldr_type); 271 272 /* struct UNICODE_STRING */ 273 uni_str_type = arch_composite_type (gdbarch, "unicode_string", 274 TYPE_CODE_STRUCT); 275 276 append_composite_type_field (uni_str_type, "length", word_type); 277 append_composite_type_field (uni_str_type, "maximum_length", word_type); 278 append_composite_type_field_aligned (uni_str_type, "buffer", 279 wchar_ptr_type, 280 wchar_ptr_type->length ()); 281 282 /* struct _RTL_USER_PROCESS_PARAMETERS */ 283 rupp_type = arch_composite_type (gdbarch, "rtl_user_process_parameters", 284 TYPE_CODE_STRUCT); 285 286 append_composite_type_field (rupp_type, "maximum_length", dword32_type); 287 append_composite_type_field (rupp_type, "length", dword32_type); 288 append_composite_type_field (rupp_type, "flags", dword32_type); 289 append_composite_type_field (rupp_type, "debug_flags", dword32_type); 290 append_composite_type_field (rupp_type, "console_handle", void_ptr_type); 291 append_composite_type_field (rupp_type, "console_flags", dword32_type); 292 append_composite_type_field_aligned (rupp_type, "standard_input", 293 void_ptr_type, 294 void_ptr_type->length ()); 295 append_composite_type_field (rupp_type, "standard_output", void_ptr_type); 296 append_composite_type_field (rupp_type, "standard_error", void_ptr_type); 297 append_composite_type_field (rupp_type, "current_directory", uni_str_type); 298 append_composite_type_field (rupp_type, "current_directory_handle", 299 void_ptr_type); 300 append_composite_type_field (rupp_type, "dll_path", uni_str_type); 301 append_composite_type_field (rupp_type, "image_path_name", uni_str_type); 302 append_composite_type_field (rupp_type, "command_line", uni_str_type); 303 append_composite_type_field (rupp_type, "environment", void_ptr_type); 304 append_composite_type_field (rupp_type, "starting_x", dword32_type); 305 append_composite_type_field (rupp_type, "starting_y", dword32_type); 306 append_composite_type_field (rupp_type, "count_x", dword32_type); 307 append_composite_type_field (rupp_type, "count_y", dword32_type); 308 append_composite_type_field (rupp_type, "count_chars_x", dword32_type); 309 append_composite_type_field (rupp_type, "count_chars_y", dword32_type); 310 append_composite_type_field (rupp_type, "fill_attribute", dword32_type); 311 append_composite_type_field (rupp_type, "window_flags", dword32_type); 312 append_composite_type_field (rupp_type, "show_window_flags", dword32_type); 313 append_composite_type_field_aligned (rupp_type, "window_title", 314 uni_str_type, 315 void_ptr_type->length ()); 316 append_composite_type_field (rupp_type, "desktop_info", uni_str_type); 317 append_composite_type_field (rupp_type, "shell_info", uni_str_type); 318 append_composite_type_field (rupp_type, "runtime_data", uni_str_type); 319 320 rupp_ptr_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch), 321 NULL, rupp_type); 322 323 324 /* struct process environment block */ 325 peb_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); 326 peb_type->set_name (xstrdup ("peb")); 327 328 /* First bytes contain several flags. */ 329 append_composite_type_field (peb_type, "flags", dword_ptr_type); 330 append_composite_type_field (peb_type, "mutant", void_ptr_type); 331 append_composite_type_field (peb_type, "image_base_address", void_ptr_type); 332 append_composite_type_field (peb_type, "ldr", peb_ldr_ptr_type); 333 append_composite_type_field (peb_type, "process_parameters", rupp_ptr_type); 334 append_composite_type_field (peb_type, "sub_system_data", void_ptr_type); 335 append_composite_type_field (peb_type, "process_heap", void_ptr_type); 336 append_composite_type_field (peb_type, "fast_peb_lock", void_ptr_type); 337 peb_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR, 338 void_ptr_type->length () * TARGET_CHAR_BIT, 339 NULL); 340 peb_ptr_type->set_target_type (peb_type); 341 342 343 /* struct thread information block */ 344 tib_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); 345 tib_type->set_name (xstrdup ("tib")); 346 347 /* uint32_t current_seh; %fs:0x0000 */ 348 append_composite_type_field (tib_type, "current_seh", seh_ptr_type); 349 /* uint32_t current_top_of_stack; %fs:0x0004 */ 350 append_composite_type_field (tib_type, "current_top_of_stack", 351 void_ptr_type); 352 /* uint32_t current_bottom_of_stack; %fs:0x0008 */ 353 append_composite_type_field (tib_type, "current_bottom_of_stack", 354 void_ptr_type); 355 /* uint32_t sub_system_tib; %fs:0x000c */ 356 append_composite_type_field (tib_type, "sub_system_tib", void_ptr_type); 357 358 /* uint32_t fiber_data; %fs:0x0010 */ 359 append_composite_type_field (tib_type, "fiber_data", void_ptr_type); 360 /* uint32_t arbitrary_data_slot; %fs:0x0014 */ 361 append_composite_type_field (tib_type, "arbitrary_data_slot", void_ptr_type); 362 /* uint32_t linear_address_tib; %fs:0x0018 */ 363 append_composite_type_field (tib_type, "linear_address_tib", void_ptr_type); 364 /* uint32_t environment_pointer; %fs:0x001c */ 365 append_composite_type_field (tib_type, "environment_pointer", void_ptr_type); 366 /* uint32_t process_id; %fs:0x0020 */ 367 append_composite_type_field (tib_type, "process_id", dword_ptr_type); 368 /* uint32_t current_thread_id; %fs:0x0024 */ 369 append_composite_type_field (tib_type, "thread_id", dword_ptr_type); 370 /* uint32_t active_rpc_handle; %fs:0x0028 */ 371 append_composite_type_field (tib_type, "active_rpc_handle", dword_ptr_type); 372 /* uint32_t thread_local_storage; %fs:0x002c */ 373 append_composite_type_field (tib_type, "thread_local_storage", 374 void_ptr_type); 375 /* uint32_t process_environment_block; %fs:0x0030 */ 376 append_composite_type_field (tib_type, "process_environment_block", 377 peb_ptr_type); 378 /* uint32_t last_error_number; %fs:0x0034 */ 379 append_composite_type_field (tib_type, "last_error_number", dword_ptr_type); 380 381 tib_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR, 382 void_ptr_type->length () * TARGET_CHAR_BIT, 383 NULL); 384 tib_ptr_type->set_target_type (tib_type); 385 386 windows_gdbarch_data->tib_ptr_type = tib_ptr_type; 387 388 return tib_ptr_type; 389 } 390 391 /* The $_tlb convenience variable is a bit special. We don't know 392 for sure the type of the value until we actually have a chance to 393 fetch the data. The type can change depending on gdbarch, so it is 394 also dependent on which thread you have selected. */ 395 396 /* This function implements the lval_computed support for reading a 397 $_tlb value. */ 398 399 static void 400 tlb_value_read (struct value *val) 401 { 402 CORE_ADDR tlb; 403 struct type *type = check_typedef (value_type (val)); 404 405 if (!target_get_tib_address (inferior_ptid, &tlb)) 406 error (_("Unable to read tlb")); 407 store_typed_address (value_contents_raw (val).data (), type, tlb); 408 } 409 410 /* This function implements the lval_computed support for writing a 411 $_tlb value. */ 412 413 static void 414 tlb_value_write (struct value *v, struct value *fromval) 415 { 416 error (_("Impossible to change the Thread Local Base")); 417 } 418 419 static const struct lval_funcs tlb_value_funcs = 420 { 421 tlb_value_read, 422 tlb_value_write 423 }; 424 425 426 /* Return a new value with the correct type for the tlb object of 427 the current thread using architecture GDBARCH. Return a void value 428 if there's no object available. */ 429 430 static struct value * 431 tlb_make_value (struct gdbarch *gdbarch, struct internalvar *var, void *ignore) 432 { 433 if (target_has_stack () && inferior_ptid != null_ptid) 434 { 435 struct type *type = windows_get_tlb_type (gdbarch); 436 return allocate_computed_value (type, &tlb_value_funcs, NULL); 437 } 438 439 return allocate_value (builtin_type (gdbarch)->builtin_void); 440 } 441 442 443 /* Display thread information block of a given thread. */ 444 445 static int 446 display_one_tib (ptid_t ptid) 447 { 448 gdb_byte *tib = NULL; 449 gdb_byte *index; 450 CORE_ADDR thread_local_base; 451 ULONGEST i, val, max, max_name, size, tib_size; 452 ULONGEST sizeof_ptr = gdbarch_ptr_bit (target_gdbarch ()); 453 enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); 454 455 if (sizeof_ptr == 64) 456 { 457 size = sizeof (uint64_t); 458 tib_size = sizeof (thread_information_64); 459 max = MAX_TIB64; 460 } 461 else 462 { 463 size = sizeof (uint32_t); 464 tib_size = sizeof (thread_information_32); 465 max = MAX_TIB32; 466 } 467 468 max_name = max; 469 470 if (maint_display_all_tib) 471 { 472 tib_size = FULL_TIB_SIZE; 473 max = tib_size / size; 474 } 475 476 tib = (gdb_byte *) alloca (tib_size); 477 478 if (target_get_tib_address (ptid, &thread_local_base) == 0) 479 { 480 gdb_printf (_("Unable to get thread local base for %s\n"), 481 target_pid_to_str (ptid).c_str ()); 482 return -1; 483 } 484 485 if (target_read (current_inferior ()->top_target (), TARGET_OBJECT_MEMORY, 486 NULL, tib, thread_local_base, tib_size) != tib_size) 487 { 488 gdb_printf (_("Unable to read thread information " 489 "block for %s at address %s\n"), 490 target_pid_to_str (ptid).c_str (), 491 paddress (target_gdbarch (), thread_local_base)); 492 return -1; 493 } 494 495 gdb_printf (_("Thread Information Block %s at %s\n"), 496 target_pid_to_str (ptid).c_str (), 497 paddress (target_gdbarch (), thread_local_base)); 498 499 index = (gdb_byte *) tib; 500 501 /* All fields have the size of a pointer, this allows to iterate 502 using the same for loop for both layouts. */ 503 for (i = 0; i < max; i++) 504 { 505 val = extract_unsigned_integer (index, size, byte_order); 506 if (i < max_name) 507 gdb_printf (_("%s is 0x%s\n"), TIB_NAME[i], phex (val, size)); 508 else if (val != 0) 509 gdb_printf (_("TIB[0x%s] is 0x%s\n"), phex (i * size, 2), 510 phex (val, size)); 511 index += size; 512 } 513 return 1; 514 } 515 516 /* Display thread information block of the current thread. */ 517 518 static void 519 display_tib (const char * args, int from_tty) 520 { 521 if (inferior_ptid != null_ptid) 522 display_one_tib (inferior_ptid); 523 } 524 525 void 526 windows_xfer_shared_library (const char* so_name, CORE_ADDR load_addr, 527 CORE_ADDR *text_offset_cached, 528 struct gdbarch *gdbarch, struct obstack *obstack) 529 { 530 CORE_ADDR text_offset = text_offset_cached ? *text_offset_cached : 0; 531 532 obstack_grow_str (obstack, "<library name=\""); 533 std::string p = xml_escape_text (so_name); 534 obstack_grow_str (obstack, p.c_str ()); 535 obstack_grow_str (obstack, "\"><segment address=\""); 536 537 if (!text_offset) 538 { 539 gdb_bfd_ref_ptr dll (gdb_bfd_open (so_name, gnutarget)); 540 /* The following calls are OK even if dll is NULL. 541 The default value 0x1000 is returned by pe_text_section_offset 542 in that case. */ 543 text_offset = pe_text_section_offset (dll.get ()); 544 if (text_offset_cached) 545 *text_offset_cached = text_offset; 546 } 547 548 obstack_grow_str (obstack, paddress (gdbarch, load_addr + text_offset)); 549 obstack_grow_str (obstack, "\"/></library>"); 550 } 551 552 /* Implement the "iterate_over_objfiles_in_search_order" gdbarch 553 method. It searches all objfiles, starting with CURRENT_OBJFILE 554 first (if not NULL). 555 556 On Windows, the system behaves a little differently when two 557 objfiles each define a global symbol using the same name, compared 558 to other platforms such as GNU/Linux for instance. On GNU/Linux, 559 all instances of the symbol effectively get merged into a single 560 one, but on Windows, they remain distinct. 561 562 As a result, it usually makes sense to start global symbol searches 563 with the current objfile before expanding it to all other objfiles. 564 This helps for instance when a user debugs some code in a DLL that 565 refers to a global variable defined inside that DLL. When trying 566 to print the value of that global variable, it would be unhelpful 567 to print the value of another global variable defined with the same 568 name, but in a different DLL. */ 569 570 static void 571 windows_iterate_over_objfiles_in_search_order 572 (gdbarch *gdbarch, iterate_over_objfiles_in_search_order_cb_ftype cb, 573 objfile *current_objfile) 574 { 575 if (current_objfile) 576 { 577 if (cb (current_objfile)) 578 return; 579 } 580 581 for (objfile *objfile : current_program_space->objfiles ()) 582 if (objfile != current_objfile) 583 { 584 if (cb (objfile)) 585 return; 586 } 587 } 588 589 static void 590 show_maint_show_all_tib (struct ui_file *file, int from_tty, 591 struct cmd_list_element *c, const char *value) 592 { 593 gdb_printf (file, _("Show all non-zero elements of " 594 "Thread Information Block is %s.\n"), value); 595 } 596 597 598 static int w32_prefix_command_valid = 0; 599 void 600 init_w32_command_list (void) 601 { 602 if (!w32_prefix_command_valid) 603 { 604 add_basic_prefix_cmd 605 ("w32", class_info, 606 _("Print information specific to Win32 debugging."), 607 &info_w32_cmdlist, 0, &infolist); 608 w32_prefix_command_valid = 1; 609 } 610 } 611 612 /* Implementation of `gdbarch_gdb_signal_to_target' for Windows. */ 613 614 static int 615 windows_gdb_signal_to_target (struct gdbarch *gdbarch, enum gdb_signal signal) 616 { 617 switch (signal) 618 { 619 case GDB_SIGNAL_0: 620 return 0; 621 case GDB_SIGNAL_HUP: 622 return WINDOWS_SIGHUP; 623 case GDB_SIGNAL_INT: 624 return WINDOWS_SIGINT; 625 case GDB_SIGNAL_QUIT: 626 return WINDOWS_SIGQUIT; 627 case GDB_SIGNAL_ILL: 628 return WINDOWS_SIGILL; 629 case GDB_SIGNAL_TRAP: 630 return WINDOWS_SIGTRAP; 631 case GDB_SIGNAL_ABRT: 632 return WINDOWS_SIGABRT; 633 case GDB_SIGNAL_EMT: 634 return WINDOWS_SIGEMT; 635 case GDB_SIGNAL_FPE: 636 return WINDOWS_SIGFPE; 637 case GDB_SIGNAL_KILL: 638 return WINDOWS_SIGKILL; 639 case GDB_SIGNAL_BUS: 640 return WINDOWS_SIGBUS; 641 case GDB_SIGNAL_SEGV: 642 return WINDOWS_SIGSEGV; 643 case GDB_SIGNAL_SYS: 644 return WINDOWS_SIGSYS; 645 case GDB_SIGNAL_PIPE: 646 return WINDOWS_SIGPIPE; 647 case GDB_SIGNAL_ALRM: 648 return WINDOWS_SIGALRM; 649 case GDB_SIGNAL_TERM: 650 return WINDOWS_SIGTERM; 651 } 652 return -1; 653 } 654 655 /* Implementation of `gdbarch_gdb_signal_to_target' for Cygwin. */ 656 657 static int 658 cygwin_gdb_signal_to_target (struct gdbarch *gdbarch, enum gdb_signal signal) 659 { 660 switch (signal) 661 { 662 case GDB_SIGNAL_0: 663 return 0; 664 case GDB_SIGNAL_HUP: 665 return CYGWIN_SIGHUP; 666 case GDB_SIGNAL_INT: 667 return CYGWIN_SIGINT; 668 case GDB_SIGNAL_QUIT: 669 return CYGWIN_SIGQUIT; 670 case GDB_SIGNAL_ILL: 671 return CYGWIN_SIGILL; 672 case GDB_SIGNAL_TRAP: 673 return CYGWIN_SIGTRAP; 674 case GDB_SIGNAL_ABRT: 675 return CYGWIN_SIGABRT; 676 case GDB_SIGNAL_EMT: 677 return CYGWIN_SIGEMT; 678 case GDB_SIGNAL_FPE: 679 return CYGWIN_SIGFPE; 680 case GDB_SIGNAL_KILL: 681 return CYGWIN_SIGKILL; 682 case GDB_SIGNAL_BUS: 683 return CYGWIN_SIGBUS; 684 case GDB_SIGNAL_SEGV: 685 return CYGWIN_SIGSEGV; 686 case GDB_SIGNAL_SYS: 687 return CYGWIN_SIGSYS; 688 case GDB_SIGNAL_PIPE: 689 return CYGWIN_SIGPIPE; 690 case GDB_SIGNAL_ALRM: 691 return CYGWIN_SIGALRM; 692 case GDB_SIGNAL_TERM: 693 return CYGWIN_SIGTERM; 694 case GDB_SIGNAL_URG: 695 return CYGWIN_SIGURG; 696 case GDB_SIGNAL_STOP: 697 return CYGWIN_SIGSTOP; 698 case GDB_SIGNAL_TSTP: 699 return CYGWIN_SIGTSTP; 700 case GDB_SIGNAL_CONT: 701 return CYGWIN_SIGCONT; 702 case GDB_SIGNAL_CHLD: 703 return CYGWIN_SIGCHLD; 704 case GDB_SIGNAL_TTIN: 705 return CYGWIN_SIGTTIN; 706 case GDB_SIGNAL_TTOU: 707 return CYGWIN_SIGTTOU; 708 case GDB_SIGNAL_IO: 709 return CYGWIN_SIGIO; 710 case GDB_SIGNAL_XCPU: 711 return CYGWIN_SIGXCPU; 712 case GDB_SIGNAL_XFSZ: 713 return CYGWIN_SIGXFSZ; 714 case GDB_SIGNAL_VTALRM: 715 return CYGWIN_SIGVTALRM; 716 case GDB_SIGNAL_PROF: 717 return CYGWIN_SIGPROF; 718 case GDB_SIGNAL_WINCH: 719 return CYGWIN_SIGWINCH; 720 case GDB_SIGNAL_PWR: 721 return CYGWIN_SIGLOST; 722 case GDB_SIGNAL_USR1: 723 return CYGWIN_SIGUSR1; 724 case GDB_SIGNAL_USR2: 725 return CYGWIN_SIGUSR2; 726 } 727 return -1; 728 } 729 730 struct enum_value_name 731 { 732 uint32_t value; 733 const char *name; 734 }; 735 736 /* Allocate a TYPE_CODE_ENUM type structure with its named values. */ 737 738 static struct type * 739 create_enum (struct gdbarch *gdbarch, int bit, const char *name, 740 const struct enum_value_name *values, int count) 741 { 742 struct type *type; 743 int i; 744 745 type = arch_type (gdbarch, TYPE_CODE_ENUM, bit, name); 746 type->set_num_fields (count); 747 type->set_fields 748 ((struct field *) TYPE_ZALLOC (type, sizeof (struct field) * count)); 749 type->set_is_unsigned (true); 750 751 for (i = 0; i < count; i++) 752 { 753 type->field (i).set_name (values[i].name); 754 type->field (i).set_loc_enumval (values[i].value); 755 } 756 757 return type; 758 } 759 760 static const struct enum_value_name exception_values[] = 761 { 762 { 0x40000015, "FATAL_APP_EXIT" }, 763 { 0x4000001E, "WX86_SINGLE_STEP" }, 764 { 0x4000001F, "WX86_BREAKPOINT" }, 765 { 0x40010005, "DBG_CONTROL_C" }, 766 { 0x40010008, "DBG_CONTROL_BREAK" }, 767 { 0x80000002, "DATATYPE_MISALIGNMENT" }, 768 { 0x80000003, "BREAKPOINT" }, 769 { 0x80000004, "SINGLE_STEP" }, 770 { 0xC0000005, "ACCESS_VIOLATION" }, 771 { 0xC0000006, "IN_PAGE_ERROR" }, 772 { 0xC000001D, "ILLEGAL_INSTRUCTION" }, 773 { 0xC0000025, "NONCONTINUABLE_EXCEPTION" }, 774 { 0xC0000026, "INVALID_DISPOSITION" }, 775 { 0xC000008C, "ARRAY_BOUNDS_EXCEEDED" }, 776 { 0xC000008D, "FLOAT_DENORMAL_OPERAND" }, 777 { 0xC000008E, "FLOAT_DIVIDE_BY_ZERO" }, 778 { 0xC000008F, "FLOAT_INEXACT_RESULT" }, 779 { 0xC0000090, "FLOAT_INVALID_OPERATION" }, 780 { 0xC0000091, "FLOAT_OVERFLOW" }, 781 { 0xC0000092, "FLOAT_STACK_CHECK" }, 782 { 0xC0000093, "FLOAT_UNDERFLOW" }, 783 { 0xC0000094, "INTEGER_DIVIDE_BY_ZERO" }, 784 { 0xC0000095, "INTEGER_OVERFLOW" }, 785 { 0xC0000096, "PRIV_INSTRUCTION" }, 786 { 0xC00000FD, "STACK_OVERFLOW" }, 787 { 0xC0000409, "FAST_FAIL" }, 788 }; 789 790 static const struct enum_value_name violation_values[] = 791 { 792 { 0, "READ_ACCESS_VIOLATION" }, 793 { 1, "WRITE_ACCESS_VIOLATION" }, 794 { 8, "DATA_EXECUTION_PREVENTION_VIOLATION" }, 795 }; 796 797 /* Implement the "get_siginfo_type" gdbarch method. */ 798 799 static struct type * 800 windows_get_siginfo_type (struct gdbarch *gdbarch) 801 { 802 struct windows_gdbarch_data *windows_gdbarch_data; 803 struct type *dword_type, *pvoid_type, *ulongptr_type; 804 struct type *code_enum, *violation_enum; 805 struct type *violation_type, *para_type, *siginfo_ptr_type, *siginfo_type; 806 807 windows_gdbarch_data = get_windows_gdbarch_data (gdbarch); 808 if (windows_gdbarch_data->siginfo_type != NULL) 809 return windows_gdbarch_data->siginfo_type; 810 811 dword_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), 812 1, "DWORD"); 813 pvoid_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch), "PVOID", 814 builtin_type (gdbarch)->builtin_void); 815 ulongptr_type = arch_integer_type (gdbarch, gdbarch_ptr_bit (gdbarch), 816 1, "ULONG_PTR"); 817 818 /* ExceptionCode value names */ 819 code_enum = create_enum (gdbarch, gdbarch_int_bit (gdbarch), 820 "ExceptionCode", exception_values, 821 ARRAY_SIZE (exception_values)); 822 823 /* ACCESS_VIOLATION type names */ 824 violation_enum = create_enum (gdbarch, gdbarch_ptr_bit (gdbarch), 825 "ViolationType", violation_values, 826 ARRAY_SIZE (violation_values)); 827 828 /* ACCESS_VIOLATION information */ 829 violation_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); 830 append_composite_type_field (violation_type, "Type", violation_enum); 831 append_composite_type_field (violation_type, "Address", pvoid_type); 832 833 /* Unnamed union of the documented field ExceptionInformation, 834 and the alternative AccessViolationInformation (which displays 835 human-readable values for ExceptionCode ACCESS_VIOLATION). */ 836 para_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); 837 append_composite_type_field (para_type, "ExceptionInformation", 838 lookup_array_range_type (ulongptr_type, 0, 14)); 839 append_composite_type_field (para_type, "AccessViolationInformation", 840 violation_type); 841 842 siginfo_type = arch_composite_type (gdbarch, "EXCEPTION_RECORD", 843 TYPE_CODE_STRUCT); 844 siginfo_ptr_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch), 845 NULL, siginfo_type); 846 847 /* ExceptionCode is documented as type DWORD, but here a helper 848 enum type is used instead to display a human-readable value. */ 849 append_composite_type_field (siginfo_type, "ExceptionCode", code_enum); 850 append_composite_type_field (siginfo_type, "ExceptionFlags", dword_type); 851 append_composite_type_field (siginfo_type, "ExceptionRecord", 852 siginfo_ptr_type); 853 append_composite_type_field (siginfo_type, "ExceptionAddress", 854 pvoid_type); 855 append_composite_type_field (siginfo_type, "NumberParameters", dword_type); 856 /* The 64-bit variant needs some padding. */ 857 append_composite_type_field_aligned (siginfo_type, "", 858 para_type, ulongptr_type->length ()); 859 860 windows_gdbarch_data->siginfo_type = siginfo_type; 861 862 return siginfo_type; 863 } 864 865 /* Implement the "solib_create_inferior_hook" target_so_ops method. */ 866 867 static void 868 windows_solib_create_inferior_hook (int from_tty) 869 { 870 CORE_ADDR exec_base = 0; 871 872 /* Find base address of main executable in 873 TIB->process_environment_block->image_base_address. */ 874 struct gdbarch *gdbarch = target_gdbarch (); 875 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); 876 int ptr_bytes; 877 int peb_offset; /* Offset of process_environment_block in TIB. */ 878 int base_offset; /* Offset of image_base_address in PEB. */ 879 if (gdbarch_ptr_bit (gdbarch) == 32) 880 { 881 ptr_bytes = 4; 882 peb_offset = 48; 883 base_offset = 8; 884 } 885 else 886 { 887 ptr_bytes = 8; 888 peb_offset = 96; 889 base_offset = 16; 890 } 891 CORE_ADDR tlb; 892 gdb_byte buf[8]; 893 if (target_has_execution () 894 && target_get_tib_address (inferior_ptid, &tlb) 895 && !target_read_memory (tlb + peb_offset, buf, ptr_bytes)) 896 { 897 CORE_ADDR peb = extract_unsigned_integer (buf, ptr_bytes, byte_order); 898 if (!target_read_memory (peb + base_offset, buf, ptr_bytes)) 899 exec_base = extract_unsigned_integer (buf, ptr_bytes, byte_order); 900 } 901 902 /* Rebase executable if the base address changed because of ASLR. */ 903 if (current_program_space->symfile_object_file != nullptr && exec_base != 0) 904 { 905 CORE_ADDR vmaddr 906 = pe_data (current_program_space->exec_bfd ())->pe_opthdr.ImageBase; 907 if (vmaddr != exec_base) 908 objfile_rebase (current_program_space->symfile_object_file, 909 exec_base - vmaddr); 910 } 911 } 912 913 static struct target_so_ops windows_so_ops; 914 915 /* Common parts for gdbarch initialization for the Windows and Cygwin OS 916 ABIs. */ 917 918 static void 919 windows_init_abi_common (struct gdbarch_info info, struct gdbarch *gdbarch) 920 { 921 set_gdbarch_wchar_bit (gdbarch, 16); 922 set_gdbarch_wchar_signed (gdbarch, 0); 923 924 /* Canonical paths on this target look like 925 `c:\Program Files\Foo App\mydll.dll', for example. */ 926 set_gdbarch_has_dos_based_file_system (gdbarch, 1); 927 928 set_gdbarch_iterate_over_objfiles_in_search_order 929 (gdbarch, windows_iterate_over_objfiles_in_search_order); 930 931 windows_so_ops = solib_target_so_ops; 932 windows_so_ops.solib_create_inferior_hook 933 = windows_solib_create_inferior_hook; 934 set_gdbarch_so_ops (gdbarch, &windows_so_ops); 935 936 set_gdbarch_get_siginfo_type (gdbarch, windows_get_siginfo_type); 937 } 938 939 /* See windows-tdep.h. */ 940 void 941 windows_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) 942 { 943 windows_init_abi_common (info, gdbarch); 944 set_gdbarch_gdb_signal_to_target (gdbarch, windows_gdb_signal_to_target); 945 } 946 947 /* See windows-tdep.h. */ 948 949 void 950 cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) 951 { 952 windows_init_abi_common (info, gdbarch); 953 set_gdbarch_gdb_signal_to_target (gdbarch, cygwin_gdb_signal_to_target); 954 } 955 956 /* Implementation of `tlb' variable. */ 957 958 static const struct internalvar_funcs tlb_funcs = 959 { 960 tlb_make_value, 961 NULL, 962 }; 963 964 /* Layout of an element of a PE's Import Directory Table. Based on: 965 966 https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#import-directory-table 967 */ 968 969 struct pe_import_directory_entry 970 { 971 uint32_t import_lookup_table_rva; 972 uint32_t timestamp; 973 uint32_t forwarder_chain; 974 uint32_t name_rva; 975 uint32_t import_address_table_rva; 976 }; 977 978 gdb_static_assert (sizeof (pe_import_directory_entry) == 20); 979 980 /* See windows-tdep.h. */ 981 982 bool 983 is_linked_with_cygwin_dll (bfd *abfd) 984 { 985 /* The list of DLLs a PE is linked to is in the .idata section. See: 986 987 https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#the-idata-section 988 */ 989 asection *idata_section = bfd_get_section_by_name (abfd, ".idata"); 990 if (idata_section == nullptr) 991 return false; 992 993 bfd_size_type idata_section_size = bfd_section_size (idata_section); 994 internal_extra_pe_aouthdr *pe_extra = &pe_data (abfd)->pe_opthdr; 995 bfd_vma import_table_va = pe_extra->DataDirectory[PE_IMPORT_TABLE].VirtualAddress; 996 bfd_vma idata_section_va = bfd_section_vma (idata_section); 997 998 /* The section's virtual address as reported by BFD has the image base applied, 999 remove it. */ 1000 gdb_assert (idata_section_va >= pe_extra->ImageBase); 1001 idata_section_va -= pe_extra->ImageBase; 1002 1003 bfd_vma idata_section_end_va = idata_section_va + idata_section_size; 1004 1005 /* Make sure that the import table is indeed within the .idata section's range. */ 1006 if (import_table_va < idata_section_va 1007 || import_table_va >= idata_section_end_va) 1008 { 1009 warning (_("\ 1010 %s: import table's virtual address (%s) is outside .idata \ 1011 section's range [%s, %s]."), 1012 bfd_get_filename (abfd), hex_string (import_table_va), 1013 hex_string (idata_section_va), 1014 hex_string (idata_section_end_va)); 1015 return false; 1016 } 1017 1018 /* The import table starts at this offset into the .idata section. */ 1019 bfd_vma import_table_offset_in_sect = import_table_va - idata_section_va; 1020 1021 /* Get the section's data. */ 1022 gdb::byte_vector idata_contents; 1023 if (!gdb_bfd_get_full_section_contents (abfd, idata_section, &idata_contents)) 1024 { 1025 warning (_("%s: failed to get contents of .idata section."), 1026 bfd_get_filename (abfd)); 1027 return false; 1028 } 1029 1030 gdb_assert (idata_contents.size () == idata_section_size); 1031 1032 const gdb_byte *iter = idata_contents.data () + import_table_offset_in_sect; 1033 const gdb_byte *end = idata_contents.data () + idata_section_size; 1034 const pe_import_directory_entry null_dir_entry = { 0 }; 1035 1036 /* Iterate through all directory entries. */ 1037 while (true) 1038 { 1039 /* Is there enough space left in the section for another entry? */ 1040 if (iter + sizeof (pe_import_directory_entry) > end) 1041 { 1042 warning (_("%s: unexpected end of .idata section."), 1043 bfd_get_filename (abfd)); 1044 break; 1045 } 1046 1047 pe_import_directory_entry *dir_entry = (pe_import_directory_entry *) iter; 1048 1049 /* Is it the end of list marker? */ 1050 if (memcmp (dir_entry, &null_dir_entry, 1051 sizeof (pe_import_directory_entry)) == 0) 1052 break; 1053 1054 bfd_vma name_va = dir_entry->name_rva; 1055 1056 /* If the name's virtual address is smaller than the section's virtual 1057 address, there's a problem. */ 1058 if (name_va < idata_section_va || name_va >= idata_section_end_va) 1059 { 1060 warning (_("\ 1061 %s: name's virtual address (%s) is outside .idata section's \ 1062 range [%s, %s]."), 1063 bfd_get_filename (abfd), hex_string (name_va), 1064 hex_string (idata_section_va), 1065 hex_string (idata_section_end_va)); 1066 break; 1067 } 1068 1069 const gdb_byte *name = &idata_contents[name_va - idata_section_va]; 1070 1071 /* Make sure we don't overshoot the end of the section with the 1072 streq. */ 1073 if (name + sizeof (CYGWIN_DLL_NAME) <= end) 1074 { 1075 /* Finally, check if this is the dll name we are looking for. */ 1076 if (streq ((const char *) name, CYGWIN_DLL_NAME)) 1077 return true; 1078 } 1079 1080 iter += sizeof (pe_import_directory_entry); 1081 } 1082 1083 return false; 1084 } 1085 1086 struct cpms_data 1087 { 1088 struct gdbarch *gdbarch; 1089 struct obstack *obstack; 1090 int module_count; 1091 }; 1092 1093 static void 1094 core_process_module_section (bfd *abfd, asection *sect, void *obj) 1095 { 1096 struct cpms_data *data = (struct cpms_data *) obj; 1097 enum bfd_endian byte_order = gdbarch_byte_order (data->gdbarch); 1098 1099 unsigned int data_type; 1100 char *module_name; 1101 size_t module_name_size; 1102 size_t module_name_offset; 1103 CORE_ADDR base_addr; 1104 1105 if (!startswith (sect->name, ".module")) 1106 return; 1107 1108 gdb::byte_vector buf (bfd_section_size (sect) + 1); 1109 if (!bfd_get_section_contents (abfd, sect, 1110 buf.data (), 0, bfd_section_size (sect))) 1111 return; 1112 /* We're going to treat part of the buffer as a string, so make sure 1113 it is NUL-terminated. */ 1114 buf.back () = 0; 1115 1116 /* A DWORD (data_type) followed by struct windows_core_module_info. */ 1117 if (bfd_section_size (sect) < 4) 1118 return; 1119 data_type = extract_unsigned_integer (buf.data (), 4, byte_order); 1120 1121 if (data_type == NOTE_INFO_MODULE) 1122 { 1123 module_name_offset = 12; 1124 if (bfd_section_size (sect) < module_name_offset) 1125 return; 1126 base_addr = extract_unsigned_integer (&buf[4], 4, byte_order); 1127 module_name_size = extract_unsigned_integer (&buf[8], 4, byte_order); 1128 } 1129 else if (data_type == NOTE_INFO_MODULE64) 1130 { 1131 module_name_offset = 16; 1132 if (bfd_section_size (sect) < module_name_offset) 1133 return; 1134 base_addr = extract_unsigned_integer (&buf[4], 8, byte_order); 1135 module_name_size = extract_unsigned_integer (&buf[12], 4, byte_order); 1136 } 1137 else 1138 return; 1139 1140 if (module_name_offset + module_name_size > bfd_section_size (sect)) 1141 return; 1142 module_name = (char *) buf.data () + module_name_offset; 1143 1144 /* The first module is the .exe itself. */ 1145 if (data->module_count != 0) 1146 windows_xfer_shared_library (module_name, base_addr, 1147 NULL, data->gdbarch, data->obstack); 1148 data->module_count++; 1149 } 1150 1151 ULONGEST 1152 windows_core_xfer_shared_libraries (struct gdbarch *gdbarch, 1153 gdb_byte *readbuf, 1154 ULONGEST offset, ULONGEST len) 1155 { 1156 struct obstack obstack; 1157 const char *buf; 1158 ULONGEST len_avail; 1159 struct cpms_data data = { gdbarch, &obstack, 0 }; 1160 1161 obstack_init (&obstack); 1162 obstack_grow_str (&obstack, "<library-list>\n"); 1163 bfd_map_over_sections (core_bfd, 1164 core_process_module_section, 1165 &data); 1166 obstack_grow_str0 (&obstack, "</library-list>\n"); 1167 1168 buf = (const char *) obstack_finish (&obstack); 1169 len_avail = strlen (buf); 1170 if (offset >= len_avail) 1171 return 0; 1172 1173 if (len > len_avail - offset) 1174 len = len_avail - offset; 1175 memcpy (readbuf, buf + offset, len); 1176 1177 obstack_free (&obstack, NULL); 1178 return len; 1179 } 1180 1181 /* This is how we want PTIDs from core files to be printed. */ 1182 1183 std::string 1184 windows_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid) 1185 { 1186 if (ptid.lwp () != 0) 1187 return string_printf ("Thread 0x%lx", ptid.lwp ()); 1188 1189 return normal_pid_to_str (ptid); 1190 } 1191 1192 void _initialize_windows_tdep (); 1193 void 1194 _initialize_windows_tdep () 1195 { 1196 init_w32_command_list (); 1197 cmd_list_element *info_w32_thread_information_block_cmd 1198 = add_cmd ("thread-information-block", class_info, display_tib, 1199 _("Display thread information block."), 1200 &info_w32_cmdlist); 1201 add_alias_cmd ("tib", info_w32_thread_information_block_cmd, class_info, 1, 1202 &info_w32_cmdlist); 1203 1204 add_setshow_boolean_cmd ("show-all-tib", class_maintenance, 1205 &maint_display_all_tib, _("\ 1206 Set whether to display all non-zero fields of thread information block."), _("\ 1207 Show whether to display all non-zero fields of thread information block."), _("\ 1208 Use \"on\" to enable, \"off\" to disable.\n\ 1209 If enabled, all non-zero fields of thread information block are displayed,\n\ 1210 even if their meaning is unknown."), 1211 NULL, 1212 show_maint_show_all_tib, 1213 &maintenance_set_cmdlist, 1214 &maintenance_show_cmdlist); 1215 1216 /* Explicitly create without lookup, since that tries to create a 1217 value with a void typed value, and when we get here, gdbarch 1218 isn't initialized yet. At this point, we're quite sure there 1219 isn't another convenience variable of the same name. */ 1220 create_internalvar_type_lazy ("_tlb", &tlb_funcs, NULL); 1221 } 1222