gdb/windows-tdep.c

   1 /* Copyright (C) 2008-2022 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 static struct gdbarch_data *windows_gdbarch_data_handle;
 179
 180 struct windows_gdbarch_data
 181 {
 182   struct type *siginfo_type;
 183   struct type *tib_ptr_type; /* Type of thread information block */
 184 };
 185
 186 /* Allocate windows_gdbarch_data for an arch.  */
 187
 188 static void *
 189 init_windows_gdbarch_data (struct gdbarch *gdbarch)
 190 {
 191   return GDBARCH_OBSTACK_ZALLOC (gdbarch, struct windows_gdbarch_data);
 192 }
 193
 194 /* Get windows_gdbarch_data of an arch.  */
 195
 196 static struct windows_gdbarch_data *
 197 get_windows_gdbarch_data (struct gdbarch *gdbarch)
 198 {
 199   return ((struct windows_gdbarch_data *)
 200           gdbarch_data (gdbarch, windows_gdbarch_data_handle));
 201 }
 202
 203 /* Define Thread Local Base pointer type.  */
 204
 205 static struct type *
 206 windows_get_tlb_type (struct gdbarch *gdbarch)
 207 {
 208   struct type *dword_ptr_type, *dword32_type, *void_ptr_type;
 209   struct type *peb_ldr_type, *peb_ldr_ptr_type;
 210   struct type *peb_type, *peb_ptr_type, *list_type;
 211   struct type *module_list_ptr_type;
 212   struct type *tib_type, *seh_type, *tib_ptr_type, *seh_ptr_type;
 213   struct type *word_type, *wchar_type, *wchar_ptr_type;
 214   struct type *uni_str_type, *rupp_type, *rupp_ptr_type;
 215
 216   windows_gdbarch_data *windows_gdbarch_data
 217     = get_windows_gdbarch_data (gdbarch);
 218   if (windows_gdbarch_data->tib_ptr_type != nullptr)
 219     return windows_gdbarch_data->tib_ptr_type;
 220
 221   dword_ptr_type = arch_integer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
 222                                  1, "DWORD_PTR");
 223   dword32_type = arch_integer_type (gdbarch, 32,
 224                                  1, "DWORD32");
 225   word_type = arch_integer_type (gdbarch, 16,
 226                                  1, "WORD");
 227   wchar_type = arch_integer_type (gdbarch, 16,
 228                                   1, "wchar_t");
 229   void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void);
 230   wchar_ptr_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
 231                                       NULL, wchar_type);
 232
 233   /* list entry */
 234
 235   list_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 236   list_type->set_name (xstrdup ("list"));
 237
 238   module_list_ptr_type = void_ptr_type;
 239
 240   append_composite_type_field (list_type, "forward_list",
 241                                module_list_ptr_type);
 242   append_composite_type_field (list_type, "backward_list",
 243                                module_list_ptr_type);
 244
 245   /* Structured Exception Handler */
 246
 247   seh_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 248   seh_type->set_name (xstrdup ("seh"));
 249
 250   seh_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
 251                             TYPE_LENGTH (void_ptr_type) * TARGET_CHAR_BIT,
 252                             NULL);
 253   TYPE_TARGET_TYPE (seh_ptr_type) = seh_type;
 254
 255   append_composite_type_field (seh_type, "next_seh", seh_ptr_type);
 256   append_composite_type_field (seh_type, "handler",
 257                                builtin_type (gdbarch)->builtin_func_ptr);
 258
 259   /* struct _PEB_LDR_DATA */
 260   peb_ldr_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 261   peb_ldr_type->set_name (xstrdup ("peb_ldr_data"));
 262
 263   append_composite_type_field (peb_ldr_type, "length", dword32_type);
 264   append_composite_type_field (peb_ldr_type, "initialized", dword32_type);
 265   append_composite_type_field (peb_ldr_type, "ss_handle", void_ptr_type);
 266   append_composite_type_field (peb_ldr_type, "in_load_order", list_type);
 267   append_composite_type_field (peb_ldr_type, "in_memory_order", list_type);
 268   append_composite_type_field (peb_ldr_type, "in_init_order", list_type);
 269   append_composite_type_field (peb_ldr_type, "entry_in_progress",
 270                                void_ptr_type);
 271   peb_ldr_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
 272                                 TYPE_LENGTH (void_ptr_type) * TARGET_CHAR_BIT,
 273                                 NULL);
 274   TYPE_TARGET_TYPE (peb_ldr_ptr_type) = peb_ldr_type;
 275
 276   /* struct UNICODE_STRING */
 277   uni_str_type = arch_composite_type (gdbarch, "unicode_string",
 278                                       TYPE_CODE_STRUCT);
 279
 280   append_composite_type_field (uni_str_type, "length", word_type);
 281   append_composite_type_field (uni_str_type, "maximum_length", word_type);
 282   append_composite_type_field_aligned (uni_str_type, "buffer",
 283                                        wchar_ptr_type,
 284                                        TYPE_LENGTH (wchar_ptr_type));
 285
 286   /* struct _RTL_USER_PROCESS_PARAMETERS */
 287   rupp_type = arch_composite_type (gdbarch, "rtl_user_process_parameters",
 288                                    TYPE_CODE_STRUCT);
 289
 290   append_composite_type_field (rupp_type, "maximum_length", dword32_type);
 291   append_composite_type_field (rupp_type, "length", dword32_type);
 292   append_composite_type_field (rupp_type, "flags", dword32_type);
 293   append_composite_type_field (rupp_type, "debug_flags", dword32_type);
 294   append_composite_type_field (rupp_type, "console_handle", void_ptr_type);
 295   append_composite_type_field (rupp_type, "console_flags", dword32_type);
 296   append_composite_type_field_aligned (rupp_type, "standard_input",
 297                                        void_ptr_type,
 298                                        TYPE_LENGTH (void_ptr_type));
 299   append_composite_type_field (rupp_type, "standard_output", void_ptr_type);
 300   append_composite_type_field (rupp_type, "standard_error", void_ptr_type);
 301   append_composite_type_field (rupp_type, "current_directory", uni_str_type);
 302   append_composite_type_field (rupp_type, "current_directory_handle",
 303                                void_ptr_type);
 304   append_composite_type_field (rupp_type, "dll_path", uni_str_type);
 305   append_composite_type_field (rupp_type, "image_path_name", uni_str_type);
 306   append_composite_type_field (rupp_type, "command_line", uni_str_type);
 307   append_composite_type_field (rupp_type, "environment", void_ptr_type);
 308   append_composite_type_field (rupp_type, "starting_x", dword32_type);
 309   append_composite_type_field (rupp_type, "starting_y", dword32_type);
 310   append_composite_type_field (rupp_type, "count_x", dword32_type);
 311   append_composite_type_field (rupp_type, "count_y", dword32_type);
 312   append_composite_type_field (rupp_type, "count_chars_x", dword32_type);
 313   append_composite_type_field (rupp_type, "count_chars_y", dword32_type);
 314   append_composite_type_field (rupp_type, "fill_attribute", dword32_type);
 315   append_composite_type_field (rupp_type, "window_flags", dword32_type);
 316   append_composite_type_field (rupp_type, "show_window_flags", dword32_type);
 317   append_composite_type_field_aligned (rupp_type, "window_title",
 318                                        uni_str_type,
 319                                        TYPE_LENGTH (void_ptr_type));
 320   append_composite_type_field (rupp_type, "desktop_info", uni_str_type);
 321   append_composite_type_field (rupp_type, "shell_info", uni_str_type);
 322   append_composite_type_field (rupp_type, "runtime_data", uni_str_type);
 323
 324   rupp_ptr_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
 325                                      NULL, rupp_type);
 326
 327
 328   /* struct process environment block */
 329   peb_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 330   peb_type->set_name (xstrdup ("peb"));
 331
 332   /* First bytes contain several flags.  */
 333   append_composite_type_field (peb_type, "flags", dword_ptr_type);
 334   append_composite_type_field (peb_type, "mutant", void_ptr_type);
 335   append_composite_type_field (peb_type, "image_base_address", void_ptr_type);
 336   append_composite_type_field (peb_type, "ldr", peb_ldr_ptr_type);
 337   append_composite_type_field (peb_type, "process_parameters", rupp_ptr_type);
 338   append_composite_type_field (peb_type, "sub_system_data", void_ptr_type);
 339   append_composite_type_field (peb_type, "process_heap", void_ptr_type);
 340   append_composite_type_field (peb_type, "fast_peb_lock", void_ptr_type);
 341   peb_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
 342                             TYPE_LENGTH (void_ptr_type) * TARGET_CHAR_BIT,
 343                             NULL);
 344   TYPE_TARGET_TYPE (peb_ptr_type) = peb_type;
 345
 346
 347   /* struct thread information block */
 348   tib_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 349   tib_type->set_name (xstrdup ("tib"));
 350
 351   /* uint32_t current_seh;                      %fs:0x0000 */
 352   append_composite_type_field (tib_type, "current_seh", seh_ptr_type);
 353   /* uint32_t current_top_of_stack;             %fs:0x0004 */
 354   append_composite_type_field (tib_type, "current_top_of_stack",
 355                                void_ptr_type);
 356   /* uint32_t current_bottom_of_stack;          %fs:0x0008 */
 357   append_composite_type_field (tib_type, "current_bottom_of_stack",
 358                                void_ptr_type);
 359   /* uint32_t sub_system_tib;                   %fs:0x000c */
 360   append_composite_type_field (tib_type, "sub_system_tib", void_ptr_type);
 361
 362   /* uint32_t fiber_data;                       %fs:0x0010 */
 363   append_composite_type_field (tib_type, "fiber_data", void_ptr_type);
 364   /* uint32_t arbitrary_data_slot;              %fs:0x0014 */
 365   append_composite_type_field (tib_type, "arbitrary_data_slot", void_ptr_type);
 366   /* uint32_t linear_address_tib;               %fs:0x0018 */
 367   append_composite_type_field (tib_type, "linear_address_tib", void_ptr_type);
 368   /* uint32_t environment_pointer;              %fs:0x001c */
 369   append_composite_type_field (tib_type, "environment_pointer", void_ptr_type);
 370   /* uint32_t process_id;                       %fs:0x0020 */
 371   append_composite_type_field (tib_type, "process_id", dword_ptr_type);
 372   /* uint32_t current_thread_id;                %fs:0x0024 */
 373   append_composite_type_field (tib_type, "thread_id", dword_ptr_type);
 374   /* uint32_t active_rpc_handle;                %fs:0x0028 */
 375   append_composite_type_field (tib_type, "active_rpc_handle", dword_ptr_type);
 376   /* uint32_t thread_local_storage;             %fs:0x002c */
 377   append_composite_type_field (tib_type, "thread_local_storage",
 378                                void_ptr_type);
 379   /* uint32_t process_environment_block;        %fs:0x0030 */
 380   append_composite_type_field (tib_type, "process_environment_block",
 381                                peb_ptr_type);
 382   /* uint32_t last_error_number;                %fs:0x0034 */
 383   append_composite_type_field (tib_type, "last_error_number", dword_ptr_type);
 384
 385   tib_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
 386                             TYPE_LENGTH (void_ptr_type) * TARGET_CHAR_BIT,
 387                             NULL);
 388   TYPE_TARGET_TYPE (tib_ptr_type) = tib_type;
 389
 390   windows_gdbarch_data->tib_ptr_type = tib_ptr_type;
 391
 392   return tib_ptr_type;
 393 }
 394
 395 /* The $_tlb convenience variable is a bit special.  We don't know
 396    for sure the type of the value until we actually have a chance to
 397    fetch the data.  The type can change depending on gdbarch, so it is
 398    also dependent on which thread you have selected.  */
 399
 400 /* This function implements the lval_computed support for reading a
 401    $_tlb value.  */
 402
 403 static void
 404 tlb_value_read (struct value *val)
 405 {
 406   CORE_ADDR tlb;
 407   struct type *type = check_typedef (value_type (val));
 408
 409   if (!target_get_tib_address (inferior_ptid, &tlb))
 410     error (_("Unable to read tlb"));
 411   store_typed_address (value_contents_raw (val).data (), type, tlb);
 412 }
 413
 414 /* This function implements the lval_computed support for writing a
 415    $_tlb value.  */
 416
 417 static void
 418 tlb_value_write (struct value *v, struct value *fromval)
 419 {
 420   error (_("Impossible to change the Thread Local Base"));
 421 }
 422
 423 static const struct lval_funcs tlb_value_funcs =
 424   {
 425     tlb_value_read,
 426     tlb_value_write
 427   };
 428
 429
 430 /* Return a new value with the correct type for the tlb object of
 431    the current thread using architecture GDBARCH.  Return a void value
 432    if there's no object available.  */
 433
 434 static struct value *
 435 tlb_make_value (struct gdbarch *gdbarch, struct internalvar *var, void *ignore)
 436 {
 437   if (target_has_stack () && inferior_ptid != null_ptid)
 438     {
 439       struct type *type = windows_get_tlb_type (gdbarch);
 440       return allocate_computed_value (type, &tlb_value_funcs, NULL);
 441     }
 442
 443   return allocate_value (builtin_type (gdbarch)->builtin_void);
 444 }
 445
 446
 447 /* Display thread information block of a given thread.  */
 448
 449 static int
 450 display_one_tib (ptid_t ptid)
 451 {
 452   gdb_byte *tib = NULL;
 453   gdb_byte *index;
 454   CORE_ADDR thread_local_base;
 455   ULONGEST i, val, max, max_name, size, tib_size;
 456   ULONGEST sizeof_ptr = gdbarch_ptr_bit (target_gdbarch ());
 457   enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
 458
 459   if (sizeof_ptr == 64)
 460     {
 461       size = sizeof (uint64_t);
 462       tib_size = sizeof (thread_information_64);
 463       max = MAX_TIB64;
 464     }
 465   else
 466     {
 467       size = sizeof (uint32_t);
 468       tib_size = sizeof (thread_information_32);
 469       max = MAX_TIB32;
 470     }
 471
 472   max_name = max;
 473
 474   if (maint_display_all_tib)
 475     {
 476       tib_size = FULL_TIB_SIZE;
 477       max = tib_size / size;
 478     }
 479
 480   tib = (gdb_byte *) alloca (tib_size);
 481
 482   if (target_get_tib_address (ptid, &thread_local_base) == 0)
 483     {
 484       gdb_printf (_("Unable to get thread local base for %s\n"),
 485                   target_pid_to_str (ptid).c_str ());
 486       return -1;
 487     }
 488
 489   if (target_read (current_inferior ()->top_target (), TARGET_OBJECT_MEMORY,
 490                    NULL, tib, thread_local_base, tib_size) != tib_size)
 491     {
 492       gdb_printf (_("Unable to read thread information "
 493                     "block for %s at address %s\n"),
 494                   target_pid_to_str (ptid).c_str (),
 495                   paddress (target_gdbarch (), thread_local_base));
 496       return -1;
 497     }
 498
 499   gdb_printf (_("Thread Information Block %s at %s\n"),
 500               target_pid_to_str (ptid).c_str (),
 501               paddress (target_gdbarch (), thread_local_base));
 502
 503   index = (gdb_byte *) tib;
 504
 505   /* All fields have the size of a pointer, this allows to iterate
 506      using the same for loop for both layouts.  */
 507   for (i = 0; i < max; i++)
 508     {
 509       val = extract_unsigned_integer (index, size, byte_order);
 510       if (i < max_name)
 511         gdb_printf (_("%s is 0x%s\n"), TIB_NAME[i], phex (val, size));
 512       else if (val != 0)
 513         gdb_printf (_("TIB[0x%s] is 0x%s\n"), phex (i * size, 2),
 514                     phex (val, size));
 515       index += size;
 516     }
 517   return 1;
 518 }
 519
 520 /* Display thread information block of the current thread.  */
 521
 522 static void
 523 display_tib (const char * args, int from_tty)
 524 {
 525   if (inferior_ptid != null_ptid)
 526     display_one_tib (inferior_ptid);
 527 }
 528
 529 void
 530 windows_xfer_shared_library (const char* so_name, CORE_ADDR load_addr,
 531                              CORE_ADDR *text_offset_cached,
 532                              struct gdbarch *gdbarch, struct obstack *obstack)
 533 {
 534   CORE_ADDR text_offset = text_offset_cached ? *text_offset_cached : 0;
 535
 536   obstack_grow_str (obstack, "<library name=\"");
 537   std::string p = xml_escape_text (so_name);
 538   obstack_grow_str (obstack, p.c_str ());
 539   obstack_grow_str (obstack, "\"><segment address=\"");
 540
 541   if (!text_offset)
 542     {
 543       gdb_bfd_ref_ptr dll (gdb_bfd_open (so_name, gnutarget));
 544       /* The following calls are OK even if dll is NULL.
 545          The default value 0x1000 is returned by pe_text_section_offset
 546          in that case.  */
 547       text_offset = pe_text_section_offset (dll.get ());
 548       if (text_offset_cached)
 549         *text_offset_cached = text_offset;
 550     }
 551
 552   obstack_grow_str (obstack, paddress (gdbarch, load_addr + text_offset));
 553   obstack_grow_str (obstack, "\"/></library>");
 554 }
 555
 556 /* Implement the "iterate_over_objfiles_in_search_order" gdbarch
 557    method.  It searches all objfiles, starting with CURRENT_OBJFILE
 558    first (if not NULL).
 559
 560    On Windows, the system behaves a little differently when two
 561    objfiles each define a global symbol using the same name, compared
 562    to other platforms such as GNU/Linux for instance.  On GNU/Linux,
 563    all instances of the symbol effectively get merged into a single
 564    one, but on Windows, they remain distinct.
 565
 566    As a result, it usually makes sense to start global symbol searches
 567    with the current objfile before expanding it to all other objfiles.
 568    This helps for instance when a user debugs some code in a DLL that
 569    refers to a global variable defined inside that DLL.  When trying
 570    to print the value of that global variable, it would be unhelpful
 571    to print the value of another global variable defined with the same
 572    name, but in a different DLL.  */
 573
 574 static void
 575 windows_iterate_over_objfiles_in_search_order
 576   (gdbarch *gdbarch, iterate_over_objfiles_in_search_order_cb_ftype cb,
 577    objfile *current_objfile)
 578 {
 579   if (current_objfile)
 580     {
 581       if (cb (current_objfile))
 582         return;
 583     }
 584
 585   for (objfile *objfile : current_program_space->objfiles ())
 586     if (objfile != current_objfile)
 587       {
 588         if (cb (objfile))
 589           return;
 590       }
 591 }
 592
 593 static void
 594 show_maint_show_all_tib (struct ui_file *file, int from_tty,
 595                 struct cmd_list_element *c, const char *value)
 596 {
 597   gdb_printf (file, _("Show all non-zero elements of "
 598                       "Thread Information Block is %s.\n"), value);
 599 }
 600
 601
 602 static int w32_prefix_command_valid = 0;
 603 void
 604 init_w32_command_list (void)
 605 {
 606   if (!w32_prefix_command_valid)
 607     {
 608       add_basic_prefix_cmd
 609         ("w32", class_info,
 610          _("Print information specific to Win32 debugging."),
 611          &info_w32_cmdlist, 0, &infolist);
 612       w32_prefix_command_valid = 1;
 613     }
 614 }
 615
 616 /* Implementation of `gdbarch_gdb_signal_to_target' for Windows.  */
 617
 618 static int
 619 windows_gdb_signal_to_target (struct gdbarch *gdbarch, enum gdb_signal signal)
 620 {
 621   switch (signal)
 622     {
 623     case GDB_SIGNAL_0:
 624       return 0;
 625     case GDB_SIGNAL_HUP:
 626       return WINDOWS_SIGHUP;
 627     case GDB_SIGNAL_INT:
 628       return WINDOWS_SIGINT;
 629     case GDB_SIGNAL_QUIT:
 630       return WINDOWS_SIGQUIT;
 631     case GDB_SIGNAL_ILL:
 632       return WINDOWS_SIGILL;
 633     case GDB_SIGNAL_TRAP:
 634       return WINDOWS_SIGTRAP;
 635     case GDB_SIGNAL_ABRT:
 636       return WINDOWS_SIGABRT;
 637     case GDB_SIGNAL_EMT:
 638       return WINDOWS_SIGEMT;
 639     case GDB_SIGNAL_FPE:
 640       return WINDOWS_SIGFPE;
 641     case GDB_SIGNAL_KILL:
 642       return WINDOWS_SIGKILL;
 643     case GDB_SIGNAL_BUS:
 644       return WINDOWS_SIGBUS;
 645     case GDB_SIGNAL_SEGV:
 646       return WINDOWS_SIGSEGV;
 647     case GDB_SIGNAL_SYS:
 648       return WINDOWS_SIGSYS;
 649     case GDB_SIGNAL_PIPE:
 650       return WINDOWS_SIGPIPE;
 651     case GDB_SIGNAL_ALRM:
 652       return WINDOWS_SIGALRM;
 653     case GDB_SIGNAL_TERM:
 654       return WINDOWS_SIGTERM;
 655     }
 656   return -1;
 657 }
 658
 659 /* Implementation of `gdbarch_gdb_signal_to_target' for Cygwin.  */
 660
 661 static int
 662 cygwin_gdb_signal_to_target (struct gdbarch *gdbarch, enum gdb_signal signal)
 663 {
 664   switch (signal)
 665     {
 666     case GDB_SIGNAL_0:
 667       return 0;
 668     case GDB_SIGNAL_HUP:
 669       return CYGWIN_SIGHUP;
 670     case GDB_SIGNAL_INT:
 671       return CYGWIN_SIGINT;
 672     case GDB_SIGNAL_QUIT:
 673       return CYGWIN_SIGQUIT;
 674     case GDB_SIGNAL_ILL:
 675       return CYGWIN_SIGILL;
 676     case GDB_SIGNAL_TRAP:
 677       return CYGWIN_SIGTRAP;
 678     case GDB_SIGNAL_ABRT:
 679       return CYGWIN_SIGABRT;
 680     case GDB_SIGNAL_EMT:
 681       return CYGWIN_SIGEMT;
 682     case GDB_SIGNAL_FPE:
 683       return CYGWIN_SIGFPE;
 684     case GDB_SIGNAL_KILL:
 685       return CYGWIN_SIGKILL;
 686     case GDB_SIGNAL_BUS:
 687       return CYGWIN_SIGBUS;
 688     case GDB_SIGNAL_SEGV:
 689       return CYGWIN_SIGSEGV;
 690     case GDB_SIGNAL_SYS:
 691       return CYGWIN_SIGSYS;
 692     case GDB_SIGNAL_PIPE:
 693       return CYGWIN_SIGPIPE;
 694     case GDB_SIGNAL_ALRM:
 695       return CYGWIN_SIGALRM;
 696     case GDB_SIGNAL_TERM:
 697       return CYGWIN_SIGTERM;
 698     case GDB_SIGNAL_URG:
 699       return CYGWIN_SIGURG;
 700     case GDB_SIGNAL_STOP:
 701       return CYGWIN_SIGSTOP;
 702     case GDB_SIGNAL_TSTP:
 703       return CYGWIN_SIGTSTP;
 704     case GDB_SIGNAL_CONT:
 705       return CYGWIN_SIGCONT;
 706     case GDB_SIGNAL_CHLD:
 707       return CYGWIN_SIGCHLD;
 708     case GDB_SIGNAL_TTIN:
 709       return CYGWIN_SIGTTIN;
 710     case GDB_SIGNAL_TTOU:
 711       return CYGWIN_SIGTTOU;
 712     case GDB_SIGNAL_IO:
 713       return CYGWIN_SIGIO;
 714     case GDB_SIGNAL_XCPU:
 715       return CYGWIN_SIGXCPU;
 716     case GDB_SIGNAL_XFSZ:
 717       return CYGWIN_SIGXFSZ;
 718     case GDB_SIGNAL_VTALRM:
 719       return CYGWIN_SIGVTALRM;
 720     case GDB_SIGNAL_PROF:
 721       return CYGWIN_SIGPROF;
 722     case GDB_SIGNAL_WINCH:
 723       return CYGWIN_SIGWINCH;
 724     case GDB_SIGNAL_PWR:
 725       return CYGWIN_SIGLOST;
 726     case GDB_SIGNAL_USR1:
 727       return CYGWIN_SIGUSR1;
 728     case GDB_SIGNAL_USR2:
 729       return CYGWIN_SIGUSR2;
 730     }
 731   return -1;
 732 }
 733
 734 struct enum_value_name
 735 {
 736   uint32_t value;
 737   const char *name;
 738 };
 739
 740 /* Allocate a TYPE_CODE_ENUM type structure with its named values.  */
 741
 742 static struct type *
 743 create_enum (struct gdbarch *gdbarch, int bit, const char *name,
 744              const struct enum_value_name *values, int count)
 745 {
 746   struct type *type;
 747   int i;
 748
 749   type = arch_type (gdbarch, TYPE_CODE_ENUM, bit, name);
 750   type->set_num_fields (count);
 751   type->set_fields
 752     ((struct field *) TYPE_ZALLOC (type, sizeof (struct field) * count));
 753   type->set_is_unsigned (true);
 754
 755   for (i = 0; i < count; i++)
 756     {
 757       type->field (i).set_name (values[i].name);
 758       type->field (i).set_loc_enumval (values[i].value);
 759     }
 760
 761   return type;
 762 }
 763
 764 static const struct enum_value_name exception_values[] =
 765 {
 766   { 0x40000015, "FATAL_APP_EXIT" },
 767   { 0x4000001E, "WX86_SINGLE_STEP" },
 768   { 0x4000001F, "WX86_BREAKPOINT" },
 769   { 0x40010005, "DBG_CONTROL_C" },
 770   { 0x40010008, "DBG_CONTROL_BREAK" },
 771   { 0x80000002, "DATATYPE_MISALIGNMENT" },
 772   { 0x80000003, "BREAKPOINT" },
 773   { 0x80000004, "SINGLE_STEP" },
 774   { 0xC0000005, "ACCESS_VIOLATION" },
 775   { 0xC0000006, "IN_PAGE_ERROR" },
 776   { 0xC000001D, "ILLEGAL_INSTRUCTION" },
 777   { 0xC0000025, "NONCONTINUABLE_EXCEPTION" },
 778   { 0xC0000026, "INVALID_DISPOSITION" },
 779   { 0xC000008C, "ARRAY_BOUNDS_EXCEEDED" },
 780   { 0xC000008D, "FLOAT_DENORMAL_OPERAND" },
 781   { 0xC000008E, "FLOAT_DIVIDE_BY_ZERO" },
 782   { 0xC000008F, "FLOAT_INEXACT_RESULT" },
 783   { 0xC0000090, "FLOAT_INVALID_OPERATION" },
 784   { 0xC0000091, "FLOAT_OVERFLOW" },
 785   { 0xC0000092, "FLOAT_STACK_CHECK" },
 786   { 0xC0000093, "FLOAT_UNDERFLOW" },
 787   { 0xC0000094, "INTEGER_DIVIDE_BY_ZERO" },
 788   { 0xC0000095, "INTEGER_OVERFLOW" },
 789   { 0xC0000096, "PRIV_INSTRUCTION" },
 790   { 0xC00000FD, "STACK_OVERFLOW" },
 791   { 0xC0000409, "FAST_FAIL" },
 792 };
 793
 794 static const struct enum_value_name violation_values[] =
 795 {
 796   { 0, "READ_ACCESS_VIOLATION" },
 797   { 1, "WRITE_ACCESS_VIOLATION" },
 798   { 8, "DATA_EXECUTION_PREVENTION_VIOLATION" },
 799 };
 800
 801 /* Implement the "get_siginfo_type" gdbarch method.  */
 802
 803 static struct type *
 804 windows_get_siginfo_type (struct gdbarch *gdbarch)
 805 {
 806   struct windows_gdbarch_data *windows_gdbarch_data;
 807   struct type *dword_type, *pvoid_type, *ulongptr_type;
 808   struct type *code_enum, *violation_enum;
 809   struct type *violation_type, *para_type, *siginfo_ptr_type, *siginfo_type;
 810
 811   windows_gdbarch_data = get_windows_gdbarch_data (gdbarch);
 812   if (windows_gdbarch_data->siginfo_type != NULL)
 813     return windows_gdbarch_data->siginfo_type;
 814
 815   dword_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
 816                                   1, "DWORD");
 817   pvoid_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch), "PVOID",
 818                                   builtin_type (gdbarch)->builtin_void);
 819   ulongptr_type = arch_integer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
 820                                      1, "ULONG_PTR");
 821
 822   /* ExceptionCode value names */
 823   code_enum = create_enum (gdbarch, gdbarch_int_bit (gdbarch),
 824                            "ExceptionCode", exception_values,
 825                            ARRAY_SIZE (exception_values));
 826
 827   /* ACCESS_VIOLATION type names */
 828   violation_enum = create_enum (gdbarch, gdbarch_ptr_bit (gdbarch),
 829                                 "ViolationType", violation_values,
 830                                 ARRAY_SIZE (violation_values));
 831
 832   /* ACCESS_VIOLATION information */
 833   violation_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 834   append_composite_type_field (violation_type, "Type", violation_enum);
 835   append_composite_type_field (violation_type, "Address", pvoid_type);
 836
 837   /* Unnamed union of the documented field ExceptionInformation,
 838      and the alternative AccessViolationInformation (which displays
 839      human-readable values for ExceptionCode ACCESS_VIOLATION).  */
 840   para_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
 841   append_composite_type_field (para_type, "ExceptionInformation",
 842                                lookup_array_range_type (ulongptr_type, 0, 14));
 843   append_composite_type_field (para_type, "AccessViolationInformation",
 844                                violation_type);
 845
 846   siginfo_type = arch_composite_type (gdbarch, "EXCEPTION_RECORD",
 847                                       TYPE_CODE_STRUCT);
 848   siginfo_ptr_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
 849                                         NULL, siginfo_type);
 850
 851   /* ExceptionCode is documented as type DWORD, but here a helper
 852      enum type is used instead to display a human-readable value.  */
 853   append_composite_type_field (siginfo_type, "ExceptionCode", code_enum);
 854   append_composite_type_field (siginfo_type, "ExceptionFlags", dword_type);
 855   append_composite_type_field (siginfo_type, "ExceptionRecord",
 856                                siginfo_ptr_type);
 857   append_composite_type_field (siginfo_type, "ExceptionAddress",
 858                                pvoid_type);
 859   append_composite_type_field (siginfo_type, "NumberParameters", dword_type);
 860   /* The 64-bit variant needs some padding.  */
 861   append_composite_type_field_aligned (siginfo_type, "",
 862                                        para_type, TYPE_LENGTH (ulongptr_type));
 863
 864   windows_gdbarch_data->siginfo_type = siginfo_type;
 865
 866   return siginfo_type;
 867 }
 868
 869 /* Implement the "solib_create_inferior_hook" target_so_ops method.  */
 870
 871 static void
 872 windows_solib_create_inferior_hook (int from_tty)
 873 {
 874   CORE_ADDR exec_base = 0;
 875
 876   /* Find base address of main executable in
 877      TIB->process_environment_block->image_base_address.  */
 878   struct gdbarch *gdbarch = target_gdbarch ();
 879   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
 880   int ptr_bytes;
 881   int peb_offset;  /* Offset of process_environment_block in TIB.  */
 882   int base_offset; /* Offset of image_base_address in PEB.  */
 883   if (gdbarch_ptr_bit (gdbarch) == 32)
 884     {
 885       ptr_bytes = 4;
 886       peb_offset = 48;
 887       base_offset = 8;
 888     }
 889   else
 890     {
 891       ptr_bytes = 8;
 892       peb_offset = 96;
 893       base_offset = 16;
 894     }
 895   CORE_ADDR tlb;
 896   gdb_byte buf[8];
 897   if (target_has_execution ()
 898       && target_get_tib_address (inferior_ptid, &tlb)
 899       && !target_read_memory (tlb + peb_offset, buf, ptr_bytes))
 900     {
 901       CORE_ADDR peb = extract_unsigned_integer (buf, ptr_bytes, byte_order);
 902       if (!target_read_memory (peb + base_offset, buf, ptr_bytes))
 903         exec_base = extract_unsigned_integer (buf, ptr_bytes, byte_order);
 904     }
 905
 906   /* Rebase executable if the base address changed because of ASLR.  */
 907   if (current_program_space->symfile_object_file != nullptr && exec_base != 0)
 908     {
 909       CORE_ADDR vmaddr
 910         = pe_data (current_program_space->exec_bfd ())->pe_opthdr.ImageBase;
 911       if (vmaddr != exec_base)
 912         objfile_rebase (current_program_space->symfile_object_file,
 913                         exec_base - vmaddr);
 914     }
 915 }
 916
 917 static struct target_so_ops windows_so_ops;
 918
 919 /* Common parts for gdbarch initialization for the Windows and Cygwin OS
 920    ABIs.  */
 921
 922 static void
 923 windows_init_abi_common (struct gdbarch_info info, struct gdbarch *gdbarch)
 924 {
 925   set_gdbarch_wchar_bit (gdbarch, 16);
 926   set_gdbarch_wchar_signed (gdbarch, 0);
 927
 928   /* Canonical paths on this target look like
 929      `c:\Program Files\Foo App\mydll.dll', for example.  */
 930   set_gdbarch_has_dos_based_file_system (gdbarch, 1);
 931
 932   set_gdbarch_iterate_over_objfiles_in_search_order
 933     (gdbarch, windows_iterate_over_objfiles_in_search_order);
 934
 935   windows_so_ops = solib_target_so_ops;
 936   windows_so_ops.solib_create_inferior_hook
 937     = windows_solib_create_inferior_hook;
 938   set_solib_ops (gdbarch, &windows_so_ops);
 939
 940   set_gdbarch_get_siginfo_type (gdbarch, windows_get_siginfo_type);
 941 }
 942
 943 /* See windows-tdep.h.  */
 944 void
 945 windows_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 946 {
 947   windows_init_abi_common (info, gdbarch);
 948   set_gdbarch_gdb_signal_to_target (gdbarch, windows_gdb_signal_to_target);
 949 }
 950
 951 /* See windows-tdep.h.  */
 952
 953 void
 954 cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 955 {
 956   windows_init_abi_common (info, gdbarch);
 957   set_gdbarch_gdb_signal_to_target (gdbarch, cygwin_gdb_signal_to_target);
 958 }
 959
 960 /* Implementation of `tlb' variable.  */
 961
 962 static const struct internalvar_funcs tlb_funcs =
 963 {
 964   tlb_make_value,
 965   NULL,
 966 };
 967
 968 /* Layout of an element of a PE's Import Directory Table.  Based on:
 969
 970      https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#import-directory-table
 971  */
 972
 973 struct pe_import_directory_entry
 974 {
 975   uint32_t import_lookup_table_rva;
 976   uint32_t timestamp;
 977   uint32_t forwarder_chain;
 978   uint32_t name_rva;
 979   uint32_t import_address_table_rva;
 980 };
 981
 982 gdb_static_assert (sizeof (pe_import_directory_entry) == 20);
 983
 984 /* See windows-tdep.h.  */
 985
 986 bool
 987 is_linked_with_cygwin_dll (bfd *abfd)
 988 {
 989   /* The list of DLLs a PE is linked to is in the .idata section.  See:
 990
 991      https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#the-idata-section
 992    */
 993   asection *idata_section = bfd_get_section_by_name (abfd, ".idata");
 994   if (idata_section == nullptr)
 995     return false;
 996
 997   bfd_size_type idata_section_size = bfd_section_size (idata_section);
 998   internal_extra_pe_aouthdr *pe_extra = &pe_data (abfd)->pe_opthdr;
 999   bfd_vma import_table_va = pe_extra->DataDirectory[PE_IMPORT_TABLE].VirtualAddress;
1000   bfd_vma idata_section_va = bfd_section_vma (idata_section);
1001
1002   /* The section's virtual address as reported by BFD has the image base applied,
1003      remove it.  */
1004   gdb_assert (idata_section_va >= pe_extra->ImageBase);
1005   idata_section_va -= pe_extra->ImageBase;
1006
1007   bfd_vma idata_section_end_va = idata_section_va + idata_section_size;
1008
1009   /* Make sure that the import table is indeed within the .idata section's range.  */
1010   if (import_table_va < idata_section_va
1011       || import_table_va >= idata_section_end_va)
1012     {
1013       warning (_("\
1014 %s: import table's virtual address (0x%" BFD_VMA_FMT "x) is outside .idata \
1015 section's range [0x%" BFD_VMA_FMT "x, 0x%" BFD_VMA_FMT "x[."),
1016                bfd_get_filename (abfd), import_table_va, idata_section_va,
1017                idata_section_end_va);
1018       return false;
1019     }
1020
1021   /* The import table starts at this offset into the .idata section.  */
1022   bfd_vma import_table_offset_in_sect = import_table_va - idata_section_va;
1023
1024   /* Get the section's data.  */
1025   gdb::byte_vector idata_contents;
1026   if (!gdb_bfd_get_full_section_contents (abfd, idata_section, &idata_contents))
1027     {
1028       warning (_("%s: failed to get contents of .idata section."),
1029                bfd_get_filename (abfd));
1030       return false;
1031     }
1032
1033   gdb_assert (idata_contents.size () == idata_section_size);
1034
1035   const gdb_byte *iter = idata_contents.data () + import_table_offset_in_sect;
1036   const gdb_byte *end = idata_contents.data () + idata_section_size;
1037   const pe_import_directory_entry null_dir_entry = { 0 };
1038
1039   /* Iterate through all directory entries.  */
1040   while (true)
1041     {
1042       /* Is there enough space left in the section for another entry?  */
1043       if (iter + sizeof (pe_import_directory_entry) > end)
1044         {
1045           warning (_("%s: unexpected end of .idata section."),
1046                    bfd_get_filename (abfd));
1047           break;
1048         }
1049
1050       pe_import_directory_entry *dir_entry = (pe_import_directory_entry *) iter;
1051
1052       /* Is it the end of list marker?  */
1053       if (memcmp (dir_entry, &null_dir_entry,
1054                   sizeof (pe_import_directory_entry)) == 0)
1055         break;
1056
1057       bfd_vma name_va = dir_entry->name_rva;
1058
1059       /* If the name's virtual address is smaller than the section's virtual
1060          address, there's a problem.  */
1061       if (name_va < idata_section_va || name_va >= idata_section_end_va)
1062         {
1063           warning (_("\
1064 %s: name's virtual address (0x%" BFD_VMA_FMT "x) is outside .idata section's \
1065 range [0x%" BFD_VMA_FMT "x, 0x%" BFD_VMA_FMT "x[."),
1066                    bfd_get_filename (abfd), name_va, idata_section_va,
1067                    idata_section_end_va);
1068           break;
1069         }
1070
1071       const gdb_byte *name = &idata_contents[name_va - idata_section_va];
1072
1073       /* Make sure we don't overshoot the end of the section with the
1074          streq.  */
1075       if (name + sizeof (CYGWIN_DLL_NAME) <= end)
1076         {
1077           /* Finally, check if this is the dll name we are looking for.  */
1078           if (streq ((const char *) name, CYGWIN_DLL_NAME))
1079             return true;
1080         }
1081
1082       iter += sizeof (pe_import_directory_entry);
1083     }
1084
1085   return false;
1086 }
1087
1088 struct cpms_data
1089 {
1090   struct gdbarch *gdbarch;
1091   struct obstack *obstack;
1092   int module_count;
1093 };
1094
1095 static void
1096 core_process_module_section (bfd *abfd, asection *sect, void *obj)
1097 {
1098   struct cpms_data *data = (struct cpms_data *) obj;
1099   enum bfd_endian byte_order = gdbarch_byte_order (data->gdbarch);
1100
1101   unsigned int data_type;
1102   char *module_name;
1103   size_t module_name_size;
1104   size_t module_name_offset;
1105   CORE_ADDR base_addr;
1106
1107   if (!startswith (sect->name, ".module"))
1108     return;
1109
1110   gdb::byte_vector buf (bfd_section_size (sect) + 1);
1111   if (!bfd_get_section_contents (abfd, sect,
1112                                  buf.data (), 0, bfd_section_size (sect)))
1113     return;
1114   /* We're going to treat part of the buffer as a string, so make sure
1115      it is NUL-terminated.  */
1116   buf.back () = 0;
1117
1118   /* A DWORD (data_type) followed by struct windows_core_module_info.  */
1119   if (bfd_section_size (sect) < 4)
1120     return;
1121   data_type = extract_unsigned_integer (buf.data (), 4, byte_order);
1122
1123   if (data_type == NOTE_INFO_MODULE)
1124     {
1125       module_name_offset = 12;
1126       if (bfd_section_size (sect) < module_name_offset)
1127         return;
1128       base_addr = extract_unsigned_integer (&buf[4], 4, byte_order);
1129       module_name_size = extract_unsigned_integer (&buf[8], 4, byte_order);
1130     }
1131   else if (data_type == NOTE_INFO_MODULE64)
1132     {
1133       module_name_offset = 16;
1134       if (bfd_section_size (sect) < module_name_offset)
1135         return;
1136       base_addr = extract_unsigned_integer (&buf[4], 8, byte_order);
1137       module_name_size = extract_unsigned_integer (&buf[12], 4, byte_order);
1138     }
1139   else
1140     return;
1141
1142   if (module_name_offset + module_name_size > bfd_section_size (sect))
1143     return;
1144   module_name = (char *) buf.data () + module_name_offset;
1145
1146   /* The first module is the .exe itself.  */
1147   if (data->module_count != 0)
1148     windows_xfer_shared_library (module_name, base_addr,
1149                                  NULL, data->gdbarch, data->obstack);
1150   data->module_count++;
1151 }
1152
1153 ULONGEST
1154 windows_core_xfer_shared_libraries (struct gdbarch *gdbarch,
1155                                   gdb_byte *readbuf,
1156                                   ULONGEST offset, ULONGEST len)
1157 {
1158   struct obstack obstack;
1159   const char *buf;
1160   ULONGEST len_avail;
1161   struct cpms_data data = { gdbarch, &obstack, 0 };
1162
1163   obstack_init (&obstack);
1164   obstack_grow_str (&obstack, "<library-list>\n");
1165   bfd_map_over_sections (core_bfd,
1166                          core_process_module_section,
1167                          &data);
1168   obstack_grow_str0 (&obstack, "</library-list>\n");
1169
1170   buf = (const char *) obstack_finish (&obstack);
1171   len_avail = strlen (buf);
1172   if (offset >= len_avail)
1173     return 0;
1174
1175   if (len > len_avail - offset)
1176     len = len_avail - offset;
1177   memcpy (readbuf, buf + offset, len);
1178
1179   obstack_free (&obstack, NULL);
1180   return len;
1181 }
1182
1183 /* This is how we want PTIDs from core files to be printed.  */
1184
1185 std::string
1186 windows_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
1187 {
1188   if (ptid.lwp () != 0)
1189     return string_printf ("Thread 0x%lx", ptid.lwp ());
1190
1191   return normal_pid_to_str (ptid);
1192 }
1193
1194 void _initialize_windows_tdep ();
1195 void
1196 _initialize_windows_tdep ()
1197 {
1198   windows_gdbarch_data_handle
1199     = gdbarch_data_register_post_init (init_windows_gdbarch_data);
1200
1201   init_w32_command_list ();
1202   cmd_list_element *info_w32_thread_information_block_cmd
1203     = add_cmd ("thread-information-block", class_info, display_tib,
1204                _("Display thread information block."),
1205                &info_w32_cmdlist);
1206   add_alias_cmd ("tib", info_w32_thread_information_block_cmd, class_info, 1,
1207                  &info_w32_cmdlist);
1208
1209   add_setshow_boolean_cmd ("show-all-tib", class_maintenance,
1210                            &maint_display_all_tib, _("\
1211 Set whether to display all non-zero fields of thread information block."), _("\
1212 Show whether to display all non-zero fields of thread information block."), _("\
1213 Use \"on\" to enable, \"off\" to disable.\n\
1214 If enabled, all non-zero fields of thread information block are displayed,\n\
1215 even if their meaning is unknown."),
1216                            NULL,
1217                            show_maint_show_all_tib,
1218                            &maintenance_set_cmdlist,
1219                            &maintenance_show_cmdlist);
1220
1221   /* Explicitly create without lookup, since that tries to create a
1222      value with a void typed value, and when we get here, gdbarch
1223      isn't initialized yet.  At this point, we're quite sure there
1224      isn't another convenience variable of the same name.  */
1225   create_internalvar_type_lazy ("_tlb", &tlb_funcs, NULL);
1226 }