| 1 | /* Copyright (C) 2008-2020 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 | #include "objfiles.h" |
| 30 | #include "symfile.h" |
| 31 | #include "coff-pe-read.h" |
| 32 | #include "gdb_bfd.h" |
| 33 | #include "complaints.h" |
| 34 | #include "solib.h" |
| 35 | #include "solib-target.h" |
| 36 | #include "gdbcore.h" |
| 37 | #include "coff/internal.h" |
| 38 | #include "libcoff.h" |
| 39 | #include "solist.h" |
| 40 | |
| 41 | #define CYGWIN_DLL_NAME "cygwin1.dll" |
| 42 | |
| 43 | /* Windows signal numbers differ between MinGW flavors and between |
| 44 | those and Cygwin. The below enumeration was gleaned from the |
| 45 | respective headers; the ones marked with MinGW64/Cygwin are defined |
| 46 | only by MinGW64 and Cygwin, not by mingw.org's MinGW. FIXME: We |
| 47 | should really have distinct MinGW vs Cygwin OSABIs, and two |
| 48 | separate enums, selected at runtime. */ |
| 49 | |
| 50 | enum |
| 51 | { |
| 52 | WINDOWS_SIGHUP = 1, /* MinGW64/Cygwin */ |
| 53 | WINDOWS_SIGINT = 2, |
| 54 | WINDOWS_SIGQUIT = 3, /* MinGW64/Cygwin */ |
| 55 | WINDOWS_SIGILL = 4, |
| 56 | WINDOWS_SIGTRAP = 5, /* MinGW64/Cygwin */ |
| 57 | #ifdef __CYGWIN__ |
| 58 | WINDOWS_SIGABRT = 6, |
| 59 | #else |
| 60 | WINDOWS_SIGIOT = 6, /* MinGW64 */ |
| 61 | #endif |
| 62 | WINDOWS_SIGEMT = 7, /* MinGW64/Cygwin */ |
| 63 | WINDOWS_SIGFPE = 8, |
| 64 | WINDOWS_SIGKILL = 9, /* MinGW64/Cygwin */ |
| 65 | WINDOWS_SIGBUS = 10, /* MinGW64/Cygwin */ |
| 66 | WINDOWS_SIGSEGV = 11, |
| 67 | WINDOWS_SIGSYS = 12, /* MinGW64/Cygwin */ |
| 68 | WINDOWS_SIGPIPE = 13,/* MinGW64/Cygwin */ |
| 69 | WINDOWS_SIGALRM = 14,/* MinGW64/Cygwin */ |
| 70 | WINDOWS_SIGTERM = 15, |
| 71 | #ifdef __CYGWIN__ |
| 72 | WINDOWS_SIGURG = 16, |
| 73 | WINDOWS_SIGSTOP = 17, |
| 74 | WINDOWS_SIGTSTP = 18, |
| 75 | WINDOWS_SIGCONT = 19, |
| 76 | WINDOWS_SIGCHLD = 20, |
| 77 | WINDOWS_SIGTTIN = 21, |
| 78 | WINDOWS_SIGTTOU = 22, |
| 79 | WINDOWS_SIGIO = 23, |
| 80 | WINDOWS_SIGXCPU = 24, |
| 81 | WINDOWS_SIGXFSZ = 25, |
| 82 | WINDOWS_SIGVTALRM = 26, |
| 83 | WINDOWS_SIGPROF = 27, |
| 84 | WINDOWS_SIGWINCH = 28, |
| 85 | WINDOWS_SIGLOST = 29, |
| 86 | WINDOWS_SIGUSR1 = 30, |
| 87 | WINDOWS_SIGUSR2 = 31 |
| 88 | #else |
| 89 | WINDOWS_SIGBREAK = 21, |
| 90 | WINDOWS_SIGABRT = 22 |
| 91 | #endif |
| 92 | }; |
| 93 | |
| 94 | struct cmd_list_element *info_w32_cmdlist; |
| 95 | |
| 96 | typedef struct thread_information_block_32 |
| 97 | { |
| 98 | uint32_t current_seh; /* %fs:0x0000 */ |
| 99 | uint32_t current_top_of_stack; /* %fs:0x0004 */ |
| 100 | uint32_t current_bottom_of_stack; /* %fs:0x0008 */ |
| 101 | uint32_t sub_system_tib; /* %fs:0x000c */ |
| 102 | uint32_t fiber_data; /* %fs:0x0010 */ |
| 103 | uint32_t arbitrary_data_slot; /* %fs:0x0014 */ |
| 104 | uint32_t linear_address_tib; /* %fs:0x0018 */ |
| 105 | uint32_t environment_pointer; /* %fs:0x001c */ |
| 106 | uint32_t process_id; /* %fs:0x0020 */ |
| 107 | uint32_t current_thread_id; /* %fs:0x0024 */ |
| 108 | uint32_t active_rpc_handle; /* %fs:0x0028 */ |
| 109 | uint32_t thread_local_storage; /* %fs:0x002c */ |
| 110 | uint32_t process_environment_block; /* %fs:0x0030 */ |
| 111 | uint32_t last_error_number; /* %fs:0x0034 */ |
| 112 | } |
| 113 | thread_information_32; |
| 114 | |
| 115 | typedef struct thread_information_block_64 |
| 116 | { |
| 117 | uint64_t current_seh; /* %gs:0x0000 */ |
| 118 | uint64_t current_top_of_stack; /* %gs:0x0008 */ |
| 119 | uint64_t current_bottom_of_stack; /* %gs:0x0010 */ |
| 120 | uint64_t sub_system_tib; /* %gs:0x0018 */ |
| 121 | uint64_t fiber_data; /* %gs:0x0020 */ |
| 122 | uint64_t arbitrary_data_slot; /* %gs:0x0028 */ |
| 123 | uint64_t linear_address_tib; /* %gs:0x0030 */ |
| 124 | uint64_t environment_pointer; /* %gs:0x0038 */ |
| 125 | uint64_t process_id; /* %gs:0x0040 */ |
| 126 | uint64_t current_thread_id; /* %gs:0x0048 */ |
| 127 | uint64_t active_rpc_handle; /* %gs:0x0050 */ |
| 128 | uint64_t thread_local_storage; /* %gs:0x0058 */ |
| 129 | uint64_t process_environment_block; /* %gs:0x0060 */ |
| 130 | uint64_t last_error_number; /* %gs:0x0068 */ |
| 131 | } |
| 132 | thread_information_64; |
| 133 | |
| 134 | |
| 135 | static const char* TIB_NAME[] = |
| 136 | { |
| 137 | " current_seh ", /* %fs:0x0000 */ |
| 138 | " current_top_of_stack ", /* %fs:0x0004 */ |
| 139 | " current_bottom_of_stack ", /* %fs:0x0008 */ |
| 140 | " sub_system_tib ", /* %fs:0x000c */ |
| 141 | " fiber_data ", /* %fs:0x0010 */ |
| 142 | " arbitrary_data_slot ", /* %fs:0x0014 */ |
| 143 | " linear_address_tib ", /* %fs:0x0018 */ |
| 144 | " environment_pointer ", /* %fs:0x001c */ |
| 145 | " process_id ", /* %fs:0x0020 */ |
| 146 | " current_thread_id ", /* %fs:0x0024 */ |
| 147 | " active_rpc_handle ", /* %fs:0x0028 */ |
| 148 | " thread_local_storage ", /* %fs:0x002c */ |
| 149 | " process_environment_block ", /* %fs:0x0030 */ |
| 150 | " last_error_number " /* %fs:0x0034 */ |
| 151 | }; |
| 152 | |
| 153 | static const int MAX_TIB32 = |
| 154 | sizeof (thread_information_32) / sizeof (uint32_t); |
| 155 | static const int MAX_TIB64 = |
| 156 | sizeof (thread_information_64) / sizeof (uint64_t); |
| 157 | static const int FULL_TIB_SIZE = 0x1000; |
| 158 | |
| 159 | static bool maint_display_all_tib = false; |
| 160 | |
| 161 | static struct gdbarch_data *windows_gdbarch_data_handle; |
| 162 | |
| 163 | struct windows_gdbarch_data |
| 164 | { |
| 165 | struct type *siginfo_type; |
| 166 | struct type *tib_ptr_type; /* Type of thread information block */ |
| 167 | }; |
| 168 | |
| 169 | /* Allocate windows_gdbarch_data for an arch. */ |
| 170 | |
| 171 | static void * |
| 172 | init_windows_gdbarch_data (struct gdbarch *gdbarch) |
| 173 | { |
| 174 | return GDBARCH_OBSTACK_ZALLOC (gdbarch, struct windows_gdbarch_data); |
| 175 | } |
| 176 | |
| 177 | /* Get windows_gdbarch_data of an arch. */ |
| 178 | |
| 179 | static struct windows_gdbarch_data * |
| 180 | get_windows_gdbarch_data (struct gdbarch *gdbarch) |
| 181 | { |
| 182 | return ((struct windows_gdbarch_data *) |
| 183 | gdbarch_data (gdbarch, windows_gdbarch_data_handle)); |
| 184 | } |
| 185 | |
| 186 | /* Define Thread Local Base pointer type. */ |
| 187 | |
| 188 | static struct type * |
| 189 | windows_get_tlb_type (struct gdbarch *gdbarch) |
| 190 | { |
| 191 | struct type *dword_ptr_type, *dword32_type, *void_ptr_type; |
| 192 | struct type *peb_ldr_type, *peb_ldr_ptr_type; |
| 193 | struct type *peb_type, *peb_ptr_type, *list_type; |
| 194 | struct type *module_list_ptr_type; |
| 195 | struct type *tib_type, *seh_type, *tib_ptr_type, *seh_ptr_type; |
| 196 | struct type *word_type, *wchar_type, *wchar_ptr_type; |
| 197 | struct type *uni_str_type, *rupp_type, *rupp_ptr_type; |
| 198 | |
| 199 | windows_gdbarch_data *windows_gdbarch_data |
| 200 | = get_windows_gdbarch_data (gdbarch); |
| 201 | if (windows_gdbarch_data->tib_ptr_type != nullptr) |
| 202 | return windows_gdbarch_data->tib_ptr_type; |
| 203 | |
| 204 | dword_ptr_type = arch_integer_type (gdbarch, gdbarch_ptr_bit (gdbarch), |
| 205 | 1, "DWORD_PTR"); |
| 206 | dword32_type = arch_integer_type (gdbarch, 32, |
| 207 | 1, "DWORD32"); |
| 208 | word_type = arch_integer_type (gdbarch, 16, |
| 209 | 1, "WORD"); |
| 210 | wchar_type = arch_integer_type (gdbarch, 16, |
| 211 | 1, "wchar_t"); |
| 212 | void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void); |
| 213 | wchar_ptr_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch), |
| 214 | NULL, wchar_type); |
| 215 | |
| 216 | /* list entry */ |
| 217 | |
| 218 | list_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
| 219 | TYPE_NAME (list_type) = xstrdup ("list"); |
| 220 | |
| 221 | module_list_ptr_type = void_ptr_type; |
| 222 | |
| 223 | append_composite_type_field (list_type, "forward_list", |
| 224 | module_list_ptr_type); |
| 225 | append_composite_type_field (list_type, "backward_list", |
| 226 | module_list_ptr_type); |
| 227 | |
| 228 | /* Structured Exception Handler */ |
| 229 | |
| 230 | seh_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
| 231 | TYPE_NAME (seh_type) = xstrdup ("seh"); |
| 232 | |
| 233 | seh_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR, |
| 234 | TYPE_LENGTH (void_ptr_type) * TARGET_CHAR_BIT, |
| 235 | NULL); |
| 236 | TYPE_TARGET_TYPE (seh_ptr_type) = seh_type; |
| 237 | |
| 238 | append_composite_type_field (seh_type, "next_seh", seh_ptr_type); |
| 239 | append_composite_type_field (seh_type, "handler", |
| 240 | builtin_type (gdbarch)->builtin_func_ptr); |
| 241 | |
| 242 | /* struct _PEB_LDR_DATA */ |
| 243 | peb_ldr_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
| 244 | TYPE_NAME (peb_ldr_type) = xstrdup ("peb_ldr_data"); |
| 245 | |
| 246 | append_composite_type_field (peb_ldr_type, "length", dword32_type); |
| 247 | append_composite_type_field (peb_ldr_type, "initialized", dword32_type); |
| 248 | append_composite_type_field (peb_ldr_type, "ss_handle", void_ptr_type); |
| 249 | append_composite_type_field (peb_ldr_type, "in_load_order", list_type); |
| 250 | append_composite_type_field (peb_ldr_type, "in_memory_order", list_type); |
| 251 | append_composite_type_field (peb_ldr_type, "in_init_order", list_type); |
| 252 | append_composite_type_field (peb_ldr_type, "entry_in_progress", |
| 253 | void_ptr_type); |
| 254 | peb_ldr_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR, |
| 255 | TYPE_LENGTH (void_ptr_type) * TARGET_CHAR_BIT, |
| 256 | NULL); |
| 257 | TYPE_TARGET_TYPE (peb_ldr_ptr_type) = peb_ldr_type; |
| 258 | |
| 259 | /* struct UNICODE_STRING */ |
| 260 | uni_str_type = arch_composite_type (gdbarch, "unicode_string", |
| 261 | TYPE_CODE_STRUCT); |
| 262 | |
| 263 | append_composite_type_field (uni_str_type, "length", word_type); |
| 264 | append_composite_type_field (uni_str_type, "maximum_length", word_type); |
| 265 | append_composite_type_field_aligned (uni_str_type, "buffer", |
| 266 | wchar_ptr_type, |
| 267 | TYPE_LENGTH (wchar_ptr_type)); |
| 268 | |
| 269 | /* struct _RTL_USER_PROCESS_PARAMETERS */ |
| 270 | rupp_type = arch_composite_type (gdbarch, "rtl_user_process_parameters", |
| 271 | TYPE_CODE_STRUCT); |
| 272 | |
| 273 | append_composite_type_field (rupp_type, "maximum_length", dword32_type); |
| 274 | append_composite_type_field (rupp_type, "length", dword32_type); |
| 275 | append_composite_type_field (rupp_type, "flags", dword32_type); |
| 276 | append_composite_type_field (rupp_type, "debug_flags", dword32_type); |
| 277 | append_composite_type_field (rupp_type, "console_handle", void_ptr_type); |
| 278 | append_composite_type_field (rupp_type, "console_flags", dword32_type); |
| 279 | append_composite_type_field_aligned (rupp_type, "standard_input", |
| 280 | void_ptr_type, |
| 281 | TYPE_LENGTH (void_ptr_type)); |
| 282 | append_composite_type_field (rupp_type, "standard_output", void_ptr_type); |
| 283 | append_composite_type_field (rupp_type, "standard_error", void_ptr_type); |
| 284 | append_composite_type_field (rupp_type, "current_directory", uni_str_type); |
| 285 | append_composite_type_field (rupp_type, "current_directory_handle", |
| 286 | void_ptr_type); |
| 287 | append_composite_type_field (rupp_type, "dll_path", uni_str_type); |
| 288 | append_composite_type_field (rupp_type, "image_path_name", uni_str_type); |
| 289 | append_composite_type_field (rupp_type, "command_line", uni_str_type); |
| 290 | append_composite_type_field (rupp_type, "environment", void_ptr_type); |
| 291 | append_composite_type_field (rupp_type, "starting_x", dword32_type); |
| 292 | append_composite_type_field (rupp_type, "starting_y", dword32_type); |
| 293 | append_composite_type_field (rupp_type, "count_x", dword32_type); |
| 294 | append_composite_type_field (rupp_type, "count_y", dword32_type); |
| 295 | append_composite_type_field (rupp_type, "count_chars_x", dword32_type); |
| 296 | append_composite_type_field (rupp_type, "count_chars_y", dword32_type); |
| 297 | append_composite_type_field (rupp_type, "fill_attribute", dword32_type); |
| 298 | append_composite_type_field (rupp_type, "window_flags", dword32_type); |
| 299 | append_composite_type_field (rupp_type, "show_window_flags", dword32_type); |
| 300 | append_composite_type_field_aligned (rupp_type, "window_title", |
| 301 | uni_str_type, |
| 302 | TYPE_LENGTH (void_ptr_type)); |
| 303 | append_composite_type_field (rupp_type, "desktop_info", uni_str_type); |
| 304 | append_composite_type_field (rupp_type, "shell_info", uni_str_type); |
| 305 | append_composite_type_field (rupp_type, "runtime_data", uni_str_type); |
| 306 | |
| 307 | rupp_ptr_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch), |
| 308 | NULL, rupp_type); |
| 309 | |
| 310 | |
| 311 | /* struct process environment block */ |
| 312 | peb_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
| 313 | TYPE_NAME (peb_type) = xstrdup ("peb"); |
| 314 | |
| 315 | /* First bytes contain several flags. */ |
| 316 | append_composite_type_field (peb_type, "flags", dword_ptr_type); |
| 317 | append_composite_type_field (peb_type, "mutant", void_ptr_type); |
| 318 | append_composite_type_field (peb_type, "image_base_address", void_ptr_type); |
| 319 | append_composite_type_field (peb_type, "ldr", peb_ldr_ptr_type); |
| 320 | append_composite_type_field (peb_type, "process_parameters", rupp_ptr_type); |
| 321 | append_composite_type_field (peb_type, "sub_system_data", void_ptr_type); |
| 322 | append_composite_type_field (peb_type, "process_heap", void_ptr_type); |
| 323 | append_composite_type_field (peb_type, "fast_peb_lock", void_ptr_type); |
| 324 | peb_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR, |
| 325 | TYPE_LENGTH (void_ptr_type) * TARGET_CHAR_BIT, |
| 326 | NULL); |
| 327 | TYPE_TARGET_TYPE (peb_ptr_type) = peb_type; |
| 328 | |
| 329 | |
| 330 | /* struct thread information block */ |
| 331 | tib_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
| 332 | TYPE_NAME (tib_type) = xstrdup ("tib"); |
| 333 | |
| 334 | /* uint32_t current_seh; %fs:0x0000 */ |
| 335 | append_composite_type_field (tib_type, "current_seh", seh_ptr_type); |
| 336 | /* uint32_t current_top_of_stack; %fs:0x0004 */ |
| 337 | append_composite_type_field (tib_type, "current_top_of_stack", |
| 338 | void_ptr_type); |
| 339 | /* uint32_t current_bottom_of_stack; %fs:0x0008 */ |
| 340 | append_composite_type_field (tib_type, "current_bottom_of_stack", |
| 341 | void_ptr_type); |
| 342 | /* uint32_t sub_system_tib; %fs:0x000c */ |
| 343 | append_composite_type_field (tib_type, "sub_system_tib", void_ptr_type); |
| 344 | |
| 345 | /* uint32_t fiber_data; %fs:0x0010 */ |
| 346 | append_composite_type_field (tib_type, "fiber_data", void_ptr_type); |
| 347 | /* uint32_t arbitrary_data_slot; %fs:0x0014 */ |
| 348 | append_composite_type_field (tib_type, "arbitrary_data_slot", void_ptr_type); |
| 349 | /* uint32_t linear_address_tib; %fs:0x0018 */ |
| 350 | append_composite_type_field (tib_type, "linear_address_tib", void_ptr_type); |
| 351 | /* uint32_t environment_pointer; %fs:0x001c */ |
| 352 | append_composite_type_field (tib_type, "environment_pointer", void_ptr_type); |
| 353 | /* uint32_t process_id; %fs:0x0020 */ |
| 354 | append_composite_type_field (tib_type, "process_id", dword_ptr_type); |
| 355 | /* uint32_t current_thread_id; %fs:0x0024 */ |
| 356 | append_composite_type_field (tib_type, "thread_id", dword_ptr_type); |
| 357 | /* uint32_t active_rpc_handle; %fs:0x0028 */ |
| 358 | append_composite_type_field (tib_type, "active_rpc_handle", dword_ptr_type); |
| 359 | /* uint32_t thread_local_storage; %fs:0x002c */ |
| 360 | append_composite_type_field (tib_type, "thread_local_storage", |
| 361 | void_ptr_type); |
| 362 | /* uint32_t process_environment_block; %fs:0x0030 */ |
| 363 | append_composite_type_field (tib_type, "process_environment_block", |
| 364 | peb_ptr_type); |
| 365 | /* uint32_t last_error_number; %fs:0x0034 */ |
| 366 | append_composite_type_field (tib_type, "last_error_number", dword_ptr_type); |
| 367 | |
| 368 | tib_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR, |
| 369 | TYPE_LENGTH (void_ptr_type) * TARGET_CHAR_BIT, |
| 370 | NULL); |
| 371 | TYPE_TARGET_TYPE (tib_ptr_type) = tib_type; |
| 372 | |
| 373 | windows_gdbarch_data->tib_ptr_type = tib_ptr_type; |
| 374 | |
| 375 | return tib_ptr_type; |
| 376 | } |
| 377 | |
| 378 | /* The $_tlb convenience variable is a bit special. We don't know |
| 379 | for sure the type of the value until we actually have a chance to |
| 380 | fetch the data. The type can change depending on gdbarch, so it is |
| 381 | also dependent on which thread you have selected. */ |
| 382 | |
| 383 | /* This function implements the lval_computed support for reading a |
| 384 | $_tlb value. */ |
| 385 | |
| 386 | static void |
| 387 | tlb_value_read (struct value *val) |
| 388 | { |
| 389 | CORE_ADDR tlb; |
| 390 | struct type *type = check_typedef (value_type (val)); |
| 391 | |
| 392 | if (!target_get_tib_address (inferior_ptid, &tlb)) |
| 393 | error (_("Unable to read tlb")); |
| 394 | store_typed_address (value_contents_raw (val), type, tlb); |
| 395 | } |
| 396 | |
| 397 | /* This function implements the lval_computed support for writing a |
| 398 | $_tlb value. */ |
| 399 | |
| 400 | static void |
| 401 | tlb_value_write (struct value *v, struct value *fromval) |
| 402 | { |
| 403 | error (_("Impossible to change the Thread Local Base")); |
| 404 | } |
| 405 | |
| 406 | static const struct lval_funcs tlb_value_funcs = |
| 407 | { |
| 408 | tlb_value_read, |
| 409 | tlb_value_write |
| 410 | }; |
| 411 | |
| 412 | |
| 413 | /* Return a new value with the correct type for the tlb object of |
| 414 | the current thread using architecture GDBARCH. Return a void value |
| 415 | if there's no object available. */ |
| 416 | |
| 417 | static struct value * |
| 418 | tlb_make_value (struct gdbarch *gdbarch, struct internalvar *var, void *ignore) |
| 419 | { |
| 420 | if (target_has_stack && inferior_ptid != null_ptid) |
| 421 | { |
| 422 | struct type *type = windows_get_tlb_type (gdbarch); |
| 423 | return allocate_computed_value (type, &tlb_value_funcs, NULL); |
| 424 | } |
| 425 | |
| 426 | return allocate_value (builtin_type (gdbarch)->builtin_void); |
| 427 | } |
| 428 | |
| 429 | |
| 430 | /* Display thread information block of a given thread. */ |
| 431 | |
| 432 | static int |
| 433 | display_one_tib (ptid_t ptid) |
| 434 | { |
| 435 | gdb_byte *tib = NULL; |
| 436 | gdb_byte *index; |
| 437 | CORE_ADDR thread_local_base; |
| 438 | ULONGEST i, val, max, max_name, size, tib_size; |
| 439 | ULONGEST sizeof_ptr = gdbarch_ptr_bit (target_gdbarch ()); |
| 440 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
| 441 | |
| 442 | if (sizeof_ptr == 64) |
| 443 | { |
| 444 | size = sizeof (uint64_t); |
| 445 | tib_size = sizeof (thread_information_64); |
| 446 | max = MAX_TIB64; |
| 447 | } |
| 448 | else |
| 449 | { |
| 450 | size = sizeof (uint32_t); |
| 451 | tib_size = sizeof (thread_information_32); |
| 452 | max = MAX_TIB32; |
| 453 | } |
| 454 | |
| 455 | max_name = max; |
| 456 | |
| 457 | if (maint_display_all_tib) |
| 458 | { |
| 459 | tib_size = FULL_TIB_SIZE; |
| 460 | max = tib_size / size; |
| 461 | } |
| 462 | |
| 463 | tib = (gdb_byte *) alloca (tib_size); |
| 464 | |
| 465 | if (target_get_tib_address (ptid, &thread_local_base) == 0) |
| 466 | { |
| 467 | printf_filtered (_("Unable to get thread local base for %s\n"), |
| 468 | target_pid_to_str (ptid).c_str ()); |
| 469 | return -1; |
| 470 | } |
| 471 | |
| 472 | if (target_read (current_top_target (), TARGET_OBJECT_MEMORY, |
| 473 | NULL, tib, thread_local_base, tib_size) != tib_size) |
| 474 | { |
| 475 | printf_filtered (_("Unable to read thread information " |
| 476 | "block for %s at address %s\n"), |
| 477 | target_pid_to_str (ptid).c_str (), |
| 478 | paddress (target_gdbarch (), thread_local_base)); |
| 479 | return -1; |
| 480 | } |
| 481 | |
| 482 | printf_filtered (_("Thread Information Block %s at %s\n"), |
| 483 | target_pid_to_str (ptid).c_str (), |
| 484 | paddress (target_gdbarch (), thread_local_base)); |
| 485 | |
| 486 | index = (gdb_byte *) tib; |
| 487 | |
| 488 | /* All fields have the size of a pointer, this allows to iterate |
| 489 | using the same for loop for both layouts. */ |
| 490 | for (i = 0; i < max; i++) |
| 491 | { |
| 492 | val = extract_unsigned_integer (index, size, byte_order); |
| 493 | if (i < max_name) |
| 494 | printf_filtered (_("%s is 0x%s\n"), TIB_NAME[i], phex (val, size)); |
| 495 | else if (val != 0) |
| 496 | printf_filtered (_("TIB[0x%s] is 0x%s\n"), phex (i * size, 2), |
| 497 | phex (val, size)); |
| 498 | index += size; |
| 499 | } |
| 500 | return 1; |
| 501 | } |
| 502 | |
| 503 | /* Display thread information block of the current thread. */ |
| 504 | |
| 505 | static void |
| 506 | display_tib (const char * args, int from_tty) |
| 507 | { |
| 508 | if (inferior_ptid != null_ptid) |
| 509 | display_one_tib (inferior_ptid); |
| 510 | } |
| 511 | |
| 512 | void |
| 513 | windows_xfer_shared_library (const char* so_name, CORE_ADDR load_addr, |
| 514 | CORE_ADDR *text_offset_cached, |
| 515 | struct gdbarch *gdbarch, struct obstack *obstack) |
| 516 | { |
| 517 | CORE_ADDR text_offset = text_offset_cached ? *text_offset_cached : 0; |
| 518 | |
| 519 | obstack_grow_str (obstack, "<library name=\""); |
| 520 | std::string p = xml_escape_text (so_name); |
| 521 | obstack_grow_str (obstack, p.c_str ()); |
| 522 | obstack_grow_str (obstack, "\"><segment address=\""); |
| 523 | |
| 524 | if (!text_offset) |
| 525 | { |
| 526 | gdb_bfd_ref_ptr dll (gdb_bfd_open (so_name, gnutarget, -1)); |
| 527 | /* The following calls are OK even if dll is NULL. |
| 528 | The default value 0x1000 is returned by pe_text_section_offset |
| 529 | in that case. */ |
| 530 | text_offset = pe_text_section_offset (dll.get ()); |
| 531 | if (text_offset_cached) |
| 532 | *text_offset_cached = text_offset; |
| 533 | } |
| 534 | |
| 535 | obstack_grow_str (obstack, paddress (gdbarch, load_addr + text_offset)); |
| 536 | obstack_grow_str (obstack, "\"/></library>"); |
| 537 | } |
| 538 | |
| 539 | /* Implement the "iterate_over_objfiles_in_search_order" gdbarch |
| 540 | method. It searches all objfiles, starting with CURRENT_OBJFILE |
| 541 | first (if not NULL). |
| 542 | |
| 543 | On Windows, the system behaves a little differently when two |
| 544 | objfiles each define a global symbol using the same name, compared |
| 545 | to other platforms such as GNU/Linux for instance. On GNU/Linux, |
| 546 | all instances of the symbol effectively get merged into a single |
| 547 | one, but on Windows, they remain distinct. |
| 548 | |
| 549 | As a result, it usually makes sense to start global symbol searches |
| 550 | with the current objfile before expanding it to all other objfiles. |
| 551 | This helps for instance when a user debugs some code in a DLL that |
| 552 | refers to a global variable defined inside that DLL. When trying |
| 553 | to print the value of that global variable, it would be unhelpful |
| 554 | to print the value of another global variable defined with the same |
| 555 | name, but in a different DLL. */ |
| 556 | |
| 557 | static void |
| 558 | windows_iterate_over_objfiles_in_search_order |
| 559 | (struct gdbarch *gdbarch, |
| 560 | iterate_over_objfiles_in_search_order_cb_ftype *cb, |
| 561 | void *cb_data, struct objfile *current_objfile) |
| 562 | { |
| 563 | int stop; |
| 564 | |
| 565 | if (current_objfile) |
| 566 | { |
| 567 | stop = cb (current_objfile, cb_data); |
| 568 | if (stop) |
| 569 | return; |
| 570 | } |
| 571 | |
| 572 | for (objfile *objfile : current_program_space->objfiles ()) |
| 573 | { |
| 574 | if (objfile != current_objfile) |
| 575 | { |
| 576 | stop = cb (objfile, cb_data); |
| 577 | if (stop) |
| 578 | return; |
| 579 | } |
| 580 | } |
| 581 | } |
| 582 | |
| 583 | static void |
| 584 | show_maint_show_all_tib (struct ui_file *file, int from_tty, |
| 585 | struct cmd_list_element *c, const char *value) |
| 586 | { |
| 587 | fprintf_filtered (file, _("Show all non-zero elements of " |
| 588 | "Thread Information Block is %s.\n"), value); |
| 589 | } |
| 590 | |
| 591 | static void |
| 592 | info_w32_command (const char *args, int from_tty) |
| 593 | { |
| 594 | help_list (info_w32_cmdlist, "info w32 ", class_info, gdb_stdout); |
| 595 | } |
| 596 | |
| 597 | static int w32_prefix_command_valid = 0; |
| 598 | void |
| 599 | init_w32_command_list (void) |
| 600 | { |
| 601 | if (!w32_prefix_command_valid) |
| 602 | { |
| 603 | add_prefix_cmd ("w32", class_info, info_w32_command, |
| 604 | _("Print information specific to Win32 debugging."), |
| 605 | &info_w32_cmdlist, "info w32 ", 0, &infolist); |
| 606 | w32_prefix_command_valid = 1; |
| 607 | } |
| 608 | } |
| 609 | |
| 610 | /* Implementation of `gdbarch_gdb_signal_to_target'. */ |
| 611 | |
| 612 | static int |
| 613 | windows_gdb_signal_to_target (struct gdbarch *gdbarch, enum gdb_signal signal) |
| 614 | { |
| 615 | switch (signal) |
| 616 | { |
| 617 | case GDB_SIGNAL_0: |
| 618 | return 0; |
| 619 | case GDB_SIGNAL_HUP: |
| 620 | return WINDOWS_SIGHUP; |
| 621 | case GDB_SIGNAL_INT: |
| 622 | return WINDOWS_SIGINT; |
| 623 | case GDB_SIGNAL_QUIT: |
| 624 | return WINDOWS_SIGQUIT; |
| 625 | case GDB_SIGNAL_ILL: |
| 626 | return WINDOWS_SIGILL; |
| 627 | case GDB_SIGNAL_TRAP: |
| 628 | return WINDOWS_SIGTRAP; |
| 629 | case GDB_SIGNAL_ABRT: |
| 630 | return WINDOWS_SIGABRT; |
| 631 | case GDB_SIGNAL_EMT: |
| 632 | return WINDOWS_SIGEMT; |
| 633 | case GDB_SIGNAL_FPE: |
| 634 | return WINDOWS_SIGFPE; |
| 635 | case GDB_SIGNAL_KILL: |
| 636 | return WINDOWS_SIGKILL; |
| 637 | case GDB_SIGNAL_BUS: |
| 638 | return WINDOWS_SIGBUS; |
| 639 | case GDB_SIGNAL_SEGV: |
| 640 | return WINDOWS_SIGSEGV; |
| 641 | case GDB_SIGNAL_SYS: |
| 642 | return WINDOWS_SIGSYS; |
| 643 | case GDB_SIGNAL_PIPE: |
| 644 | return WINDOWS_SIGPIPE; |
| 645 | case GDB_SIGNAL_ALRM: |
| 646 | return WINDOWS_SIGALRM; |
| 647 | case GDB_SIGNAL_TERM: |
| 648 | return WINDOWS_SIGTERM; |
| 649 | #ifdef __CYGWIN__ |
| 650 | case GDB_SIGNAL_URG: |
| 651 | return WINDOWS_SIGURG; |
| 652 | case GDB_SIGNAL_STOP: |
| 653 | return WINDOWS_SIGSTOP; |
| 654 | case GDB_SIGNAL_TSTP: |
| 655 | return WINDOWS_SIGTSTP; |
| 656 | case GDB_SIGNAL_CONT: |
| 657 | return WINDOWS_SIGCONT; |
| 658 | case GDB_SIGNAL_CHLD: |
| 659 | return WINDOWS_SIGCHLD; |
| 660 | case GDB_SIGNAL_TTIN: |
| 661 | return WINDOWS_SIGTTIN; |
| 662 | case GDB_SIGNAL_TTOU: |
| 663 | return WINDOWS_SIGTTOU; |
| 664 | case GDB_SIGNAL_IO: |
| 665 | return WINDOWS_SIGIO; |
| 666 | case GDB_SIGNAL_XCPU: |
| 667 | return WINDOWS_SIGXCPU; |
| 668 | case GDB_SIGNAL_XFSZ: |
| 669 | return WINDOWS_SIGXFSZ; |
| 670 | case GDB_SIGNAL_VTALRM: |
| 671 | return WINDOWS_SIGVTALRM; |
| 672 | case GDB_SIGNAL_PROF: |
| 673 | return WINDOWS_SIGPROF; |
| 674 | case GDB_SIGNAL_WINCH: |
| 675 | return WINDOWS_SIGWINCH; |
| 676 | case GDB_SIGNAL_PWR: |
| 677 | return WINDOWS_SIGLOST; |
| 678 | case GDB_SIGNAL_USR1: |
| 679 | return WINDOWS_SIGUSR1; |
| 680 | case GDB_SIGNAL_USR2: |
| 681 | return WINDOWS_SIGUSR2; |
| 682 | #endif /* __CYGWIN__ */ |
| 683 | } |
| 684 | return -1; |
| 685 | } |
| 686 | |
| 687 | struct enum_value_name |
| 688 | { |
| 689 | uint32_t value; |
| 690 | const char *name; |
| 691 | }; |
| 692 | |
| 693 | /* Allocate a TYPE_CODE_ENUM type structure with its named values. */ |
| 694 | |
| 695 | static struct type * |
| 696 | create_enum (struct gdbarch *gdbarch, int bit, const char *name, |
| 697 | const struct enum_value_name *values, int count) |
| 698 | { |
| 699 | struct type *type; |
| 700 | int i; |
| 701 | |
| 702 | type = arch_type (gdbarch, TYPE_CODE_ENUM, bit, name); |
| 703 | TYPE_NFIELDS (type) = count; |
| 704 | TYPE_FIELDS (type) = (struct field *) |
| 705 | TYPE_ZALLOC (type, sizeof (struct field) * count); |
| 706 | TYPE_UNSIGNED (type) = 1; |
| 707 | |
| 708 | for (i = 0; i < count; i++) |
| 709 | { |
| 710 | TYPE_FIELD_NAME (type, i) = values[i].name; |
| 711 | SET_FIELD_ENUMVAL (TYPE_FIELD (type, i), values[i].value); |
| 712 | } |
| 713 | |
| 714 | return type; |
| 715 | } |
| 716 | |
| 717 | static const struct enum_value_name exception_values[] = |
| 718 | { |
| 719 | { 0x40000015, "FATAL_APP_EXIT" }, |
| 720 | { 0x40010005, "DBG_CONTROL_C" }, |
| 721 | { 0x40010008, "DBG_CONTROL_BREAK" }, |
| 722 | { 0x80000002, "DATATYPE_MISALIGNMENT" }, |
| 723 | { 0x80000003, "BREAKPOINT" }, |
| 724 | { 0x80000004, "SINGLE_STEP" }, |
| 725 | { 0xC0000005, "ACCESS_VIOLATION" }, |
| 726 | { 0xC0000006, "IN_PAGE_ERROR" }, |
| 727 | { 0xC000001D, "ILLEGAL_INSTRUCTION" }, |
| 728 | { 0xC0000025, "NONCONTINUABLE_EXCEPTION" }, |
| 729 | { 0xC0000026, "INVALID_DISPOSITION" }, |
| 730 | { 0xC000008C, "ARRAY_BOUNDS_EXCEEDED" }, |
| 731 | { 0xC000008D, "FLOAT_DENORMAL_OPERAND" }, |
| 732 | { 0xC000008E, "FLOAT_DIVIDE_BY_ZERO" }, |
| 733 | { 0xC000008F, "FLOAT_INEXACT_RESULT" }, |
| 734 | { 0xC0000090, "FLOAT_INVALID_OPERATION" }, |
| 735 | { 0xC0000091, "FLOAT_OVERFLOW" }, |
| 736 | { 0xC0000092, "FLOAT_STACK_CHECK" }, |
| 737 | { 0xC0000093, "FLOAT_UNDERFLOW" }, |
| 738 | { 0xC0000094, "INTEGER_DIVIDE_BY_ZERO" }, |
| 739 | { 0xC0000095, "INTEGER_OVERFLOW" }, |
| 740 | { 0xC0000096, "PRIV_INSTRUCTION" }, |
| 741 | { 0xC00000FD, "STACK_OVERFLOW" }, |
| 742 | { 0xC0000409, "FAST_FAIL" }, |
| 743 | }; |
| 744 | |
| 745 | static const struct enum_value_name violation_values[] = |
| 746 | { |
| 747 | { 0, "READ_ACCESS_VIOLATION" }, |
| 748 | { 1, "WRITE_ACCESS_VIOLATION" }, |
| 749 | { 8, "DATA_EXECUTION_PREVENTION_VIOLATION" }, |
| 750 | }; |
| 751 | |
| 752 | /* Implement the "get_siginfo_type" gdbarch method. */ |
| 753 | |
| 754 | static struct type * |
| 755 | windows_get_siginfo_type (struct gdbarch *gdbarch) |
| 756 | { |
| 757 | struct windows_gdbarch_data *windows_gdbarch_data; |
| 758 | struct type *dword_type, *pvoid_type, *ulongptr_type; |
| 759 | struct type *code_enum, *violation_enum; |
| 760 | struct type *violation_type, *para_type, *siginfo_ptr_type, *siginfo_type; |
| 761 | |
| 762 | windows_gdbarch_data = get_windows_gdbarch_data (gdbarch); |
| 763 | if (windows_gdbarch_data->siginfo_type != NULL) |
| 764 | return windows_gdbarch_data->siginfo_type; |
| 765 | |
| 766 | dword_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), |
| 767 | 1, "DWORD"); |
| 768 | pvoid_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch), "PVOID", |
| 769 | builtin_type (gdbarch)->builtin_void); |
| 770 | ulongptr_type = arch_integer_type (gdbarch, gdbarch_ptr_bit (gdbarch), |
| 771 | 1, "ULONG_PTR"); |
| 772 | |
| 773 | /* ExceptionCode value names */ |
| 774 | code_enum = create_enum (gdbarch, gdbarch_int_bit (gdbarch), |
| 775 | "ExceptionCode", exception_values, |
| 776 | ARRAY_SIZE (exception_values)); |
| 777 | |
| 778 | /* ACCESS_VIOLATION type names */ |
| 779 | violation_enum = create_enum (gdbarch, gdbarch_ptr_bit (gdbarch), |
| 780 | "ViolationType", violation_values, |
| 781 | ARRAY_SIZE (violation_values)); |
| 782 | |
| 783 | /* ACCESS_VIOLATION information */ |
| 784 | violation_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); |
| 785 | append_composite_type_field (violation_type, "Type", violation_enum); |
| 786 | append_composite_type_field (violation_type, "Address", pvoid_type); |
| 787 | |
| 788 | /* Unnamed union of the documented field ExceptionInformation, |
| 789 | and the alternative AccessViolationInformation (which displays |
| 790 | human-readable values for ExceptionCode ACCESS_VIOLATION). */ |
| 791 | para_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); |
| 792 | append_composite_type_field (para_type, "ExceptionInformation", |
| 793 | lookup_array_range_type (ulongptr_type, 0, 14)); |
| 794 | append_composite_type_field (para_type, "AccessViolationInformation", |
| 795 | violation_type); |
| 796 | |
| 797 | siginfo_type = arch_composite_type (gdbarch, "EXCEPTION_RECORD", |
| 798 | TYPE_CODE_STRUCT); |
| 799 | siginfo_ptr_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch), |
| 800 | NULL, siginfo_type); |
| 801 | |
| 802 | /* ExceptionCode is documented as type DWORD, but here a helper |
| 803 | enum type is used instead to display a human-readable value. */ |
| 804 | append_composite_type_field (siginfo_type, "ExceptionCode", code_enum); |
| 805 | append_composite_type_field (siginfo_type, "ExceptionFlags", dword_type); |
| 806 | append_composite_type_field (siginfo_type, "ExceptionRecord", |
| 807 | siginfo_ptr_type); |
| 808 | append_composite_type_field (siginfo_type, "ExceptionAddress", |
| 809 | pvoid_type); |
| 810 | append_composite_type_field (siginfo_type, "NumberParameters", dword_type); |
| 811 | /* The 64-bit variant needs some padding. */ |
| 812 | append_composite_type_field_aligned (siginfo_type, "", |
| 813 | para_type, TYPE_LENGTH (ulongptr_type)); |
| 814 | |
| 815 | windows_gdbarch_data->siginfo_type = siginfo_type; |
| 816 | |
| 817 | return siginfo_type; |
| 818 | } |
| 819 | |
| 820 | /* Implement the "solib_create_inferior_hook" target_so_ops method. */ |
| 821 | |
| 822 | static void |
| 823 | windows_solib_create_inferior_hook (int from_tty) |
| 824 | { |
| 825 | CORE_ADDR exec_base = 0; |
| 826 | |
| 827 | /* Find base address of main executable in |
| 828 | TIB->process_environment_block->image_base_address. */ |
| 829 | struct gdbarch *gdbarch = target_gdbarch (); |
| 830 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 831 | int ptr_bytes; |
| 832 | int peb_offset; /* Offset of process_environment_block in TIB. */ |
| 833 | int base_offset; /* Offset of image_base_address in PEB. */ |
| 834 | if (gdbarch_ptr_bit (gdbarch) == 32) |
| 835 | { |
| 836 | ptr_bytes = 4; |
| 837 | peb_offset = 48; |
| 838 | base_offset = 8; |
| 839 | } |
| 840 | else |
| 841 | { |
| 842 | ptr_bytes = 8; |
| 843 | peb_offset = 96; |
| 844 | base_offset = 16; |
| 845 | } |
| 846 | CORE_ADDR tlb; |
| 847 | gdb_byte buf[8]; |
| 848 | if (target_has_execution |
| 849 | && target_get_tib_address (inferior_ptid, &tlb) |
| 850 | && !target_read_memory (tlb + peb_offset, buf, ptr_bytes)) |
| 851 | { |
| 852 | CORE_ADDR peb = extract_unsigned_integer (buf, ptr_bytes, byte_order); |
| 853 | if (!target_read_memory (peb + base_offset, buf, ptr_bytes)) |
| 854 | exec_base = extract_unsigned_integer (buf, ptr_bytes, byte_order); |
| 855 | } |
| 856 | |
| 857 | /* Rebase executable if the base address changed because of ASLR. */ |
| 858 | if (symfile_objfile != nullptr && exec_base != 0) |
| 859 | { |
| 860 | CORE_ADDR vmaddr = pe_data (exec_bfd)->pe_opthdr.ImageBase; |
| 861 | if (vmaddr != exec_base) |
| 862 | objfile_rebase (symfile_objfile, exec_base - vmaddr); |
| 863 | } |
| 864 | } |
| 865 | |
| 866 | static struct target_so_ops windows_so_ops; |
| 867 | |
| 868 | /* To be called from the various GDB_OSABI_CYGWIN handlers for the |
| 869 | various Windows architectures and machine types. */ |
| 870 | |
| 871 | void |
| 872 | windows_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 873 | { |
| 874 | set_gdbarch_wchar_bit (gdbarch, 16); |
| 875 | set_gdbarch_wchar_signed (gdbarch, 0); |
| 876 | |
| 877 | /* Canonical paths on this target look like |
| 878 | `c:\Program Files\Foo App\mydll.dll', for example. */ |
| 879 | set_gdbarch_has_dos_based_file_system (gdbarch, 1); |
| 880 | |
| 881 | set_gdbarch_iterate_over_objfiles_in_search_order |
| 882 | (gdbarch, windows_iterate_over_objfiles_in_search_order); |
| 883 | |
| 884 | set_gdbarch_gdb_signal_to_target (gdbarch, windows_gdb_signal_to_target); |
| 885 | |
| 886 | windows_so_ops = solib_target_so_ops; |
| 887 | windows_so_ops.solib_create_inferior_hook |
| 888 | = windows_solib_create_inferior_hook; |
| 889 | set_solib_ops (gdbarch, &windows_so_ops); |
| 890 | |
| 891 | set_gdbarch_get_siginfo_type (gdbarch, windows_get_siginfo_type); |
| 892 | } |
| 893 | |
| 894 | /* Implementation of `tlb' variable. */ |
| 895 | |
| 896 | static const struct internalvar_funcs tlb_funcs = |
| 897 | { |
| 898 | tlb_make_value, |
| 899 | NULL, |
| 900 | NULL |
| 901 | }; |
| 902 | |
| 903 | /* Layout of an element of a PE's Import Directory Table. Based on: |
| 904 | |
| 905 | https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#import-directory-table |
| 906 | */ |
| 907 | |
| 908 | struct pe_import_directory_entry |
| 909 | { |
| 910 | uint32_t import_lookup_table_rva; |
| 911 | uint32_t timestamp; |
| 912 | uint32_t forwarder_chain; |
| 913 | uint32_t name_rva; |
| 914 | uint32_t import_address_table_rva; |
| 915 | }; |
| 916 | |
| 917 | gdb_static_assert (sizeof (pe_import_directory_entry) == 20); |
| 918 | |
| 919 | /* See windows-tdep.h. */ |
| 920 | |
| 921 | bool |
| 922 | is_linked_with_cygwin_dll (bfd *abfd) |
| 923 | { |
| 924 | /* The list of DLLs a PE is linked to is in the .idata section. See: |
| 925 | |
| 926 | https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#the-idata-section |
| 927 | */ |
| 928 | asection *idata_section = bfd_get_section_by_name (abfd, ".idata"); |
| 929 | if (idata_section == nullptr) |
| 930 | return false; |
| 931 | |
| 932 | /* Find the virtual address of the .idata section. We must subtract this |
| 933 | from the RVAs (relative virtual addresses) to obtain an offset in the |
| 934 | section. */ |
| 935 | bfd_vma idata_addr |
| 936 | = pe_data (abfd)->pe_opthdr.DataDirectory[PE_IMPORT_TABLE].VirtualAddress; |
| 937 | |
| 938 | /* Map the section's data. */ |
| 939 | bfd_size_type idata_size; |
| 940 | const gdb_byte *const idata_contents |
| 941 | = gdb_bfd_map_section (idata_section, &idata_size); |
| 942 | if (idata_contents == nullptr) |
| 943 | { |
| 944 | warning (_("Failed to get content of .idata section.")); |
| 945 | return false; |
| 946 | } |
| 947 | |
| 948 | const gdb_byte *iter = idata_contents; |
| 949 | const gdb_byte *end = idata_contents + idata_size; |
| 950 | const pe_import_directory_entry null_dir_entry = { 0 }; |
| 951 | |
| 952 | /* Iterate through all directory entries. */ |
| 953 | while (true) |
| 954 | { |
| 955 | /* Is there enough space left in the section for another entry? */ |
| 956 | if (iter + sizeof (pe_import_directory_entry) > end) |
| 957 | { |
| 958 | warning (_("Failed to parse .idata section: unexpected end of " |
| 959 | ".idata section.")); |
| 960 | break; |
| 961 | } |
| 962 | |
| 963 | pe_import_directory_entry *dir_entry = (pe_import_directory_entry *) iter; |
| 964 | |
| 965 | /* Is it the end of list marker? */ |
| 966 | if (memcmp (dir_entry, &null_dir_entry, |
| 967 | sizeof (pe_import_directory_entry)) == 0) |
| 968 | break; |
| 969 | |
| 970 | bfd_vma name_addr = dir_entry->name_rva; |
| 971 | |
| 972 | /* If the name's virtual address is smaller than the section's virtual |
| 973 | address, there's a problem. */ |
| 974 | if (name_addr < idata_addr |
| 975 | || name_addr >= (idata_addr + idata_size)) |
| 976 | { |
| 977 | warning (_("\ |
| 978 | Failed to parse .idata section: name's virtual address (0x%" BFD_VMA_FMT "x) \ |
| 979 | is outside .idata section's range [0x%" BFD_VMA_FMT "x, 0x%" BFD_VMA_FMT "x[."), |
| 980 | name_addr, idata_addr, idata_addr + idata_size); |
| 981 | break; |
| 982 | } |
| 983 | |
| 984 | const gdb_byte *name = &idata_contents[name_addr - idata_addr]; |
| 985 | |
| 986 | /* Make sure we don't overshoot the end of the section with the streq. */ |
| 987 | if (name + sizeof (CYGWIN_DLL_NAME) > end) |
| 988 | continue; |
| 989 | |
| 990 | /* Finally, check if this is the dll name we are looking for. */ |
| 991 | if (streq ((const char *) name, CYGWIN_DLL_NAME)) |
| 992 | return true; |
| 993 | |
| 994 | iter += sizeof (pe_import_directory_entry); |
| 995 | } |
| 996 | |
| 997 | return false; |
| 998 | } |
| 999 | |
| 1000 | void _initialize_windows_tdep (); |
| 1001 | void |
| 1002 | _initialize_windows_tdep () |
| 1003 | { |
| 1004 | windows_gdbarch_data_handle |
| 1005 | = gdbarch_data_register_post_init (init_windows_gdbarch_data); |
| 1006 | |
| 1007 | init_w32_command_list (); |
| 1008 | add_cmd ("thread-information-block", class_info, display_tib, |
| 1009 | _("Display thread information block."), |
| 1010 | &info_w32_cmdlist); |
| 1011 | add_alias_cmd ("tib", "thread-information-block", class_info, 1, |
| 1012 | &info_w32_cmdlist); |
| 1013 | |
| 1014 | add_setshow_boolean_cmd ("show-all-tib", class_maintenance, |
| 1015 | &maint_display_all_tib, _("\ |
| 1016 | Set whether to display all non-zero fields of thread information block."), _("\ |
| 1017 | Show whether to display all non-zero fields of thread information block."), _("\ |
| 1018 | Use \"on\" to enable, \"off\" to disable.\n\ |
| 1019 | If enabled, all non-zero fields of thread information block are displayed,\n\ |
| 1020 | even if their meaning is unknown."), |
| 1021 | NULL, |
| 1022 | show_maint_show_all_tib, |
| 1023 | &maintenance_set_cmdlist, |
| 1024 | &maintenance_show_cmdlist); |
| 1025 | |
| 1026 | /* Explicitly create without lookup, since that tries to create a |
| 1027 | value with a void typed value, and when we get here, gdbarch |
| 1028 | isn't initialized yet. At this point, we're quite sure there |
| 1029 | isn't another convenience variable of the same name. */ |
| 1030 | create_internalvar_type_lazy ("_tlb", &tlb_funcs, NULL); |
| 1031 | } |