| 1 | /* Target-vector operations for controlling win32 child processes, for GDB. |
| 2 | |
| 3 | Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, |
| 4 | 2005, 2006, 2007 Free Software Foundation, Inc. |
| 5 | |
| 6 | Contributed by Cygnus Solutions, A Red Hat Company. |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 2 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without eve nthe implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program; if not, write to the Free Software |
| 22 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 23 | Boston, MA 02110-1301, USA. */ |
| 24 | |
| 25 | /* Originally by Steve Chamberlain, sac@cygnus.com */ |
| 26 | |
| 27 | /* We assume we're being built with and will be used for cygwin. */ |
| 28 | |
| 29 | #include "defs.h" |
| 30 | #include "frame.h" /* required by inferior.h */ |
| 31 | #include "inferior.h" |
| 32 | #include "target.h" |
| 33 | #include "exceptions.h" |
| 34 | #include "gdbcore.h" |
| 35 | #include "command.h" |
| 36 | #include "completer.h" |
| 37 | #include "regcache.h" |
| 38 | #include "top.h" |
| 39 | #include <signal.h> |
| 40 | #include <sys/types.h> |
| 41 | #include <fcntl.h> |
| 42 | #include <stdlib.h> |
| 43 | #include <windows.h> |
| 44 | #include <imagehlp.h> |
| 45 | #include <sys/cygwin.h> |
| 46 | #include <signal.h> |
| 47 | |
| 48 | #include "buildsym.h" |
| 49 | #include "symfile.h" |
| 50 | #include "objfiles.h" |
| 51 | #include "gdb_string.h" |
| 52 | #include "gdbthread.h" |
| 53 | #include "gdbcmd.h" |
| 54 | #include <sys/param.h> |
| 55 | #include <unistd.h> |
| 56 | #include "exec.h" |
| 57 | #include "solist.h" |
| 58 | #include "solib.h" |
| 59 | |
| 60 | #include "i386-tdep.h" |
| 61 | #include "i387-tdep.h" |
| 62 | |
| 63 | static struct target_ops win32_ops; |
| 64 | static struct target_so_ops win32_so_ops; |
| 65 | |
| 66 | /* The starting and ending address of the cygwin1.dll text segment. */ |
| 67 | static bfd_vma cygwin_load_start; |
| 68 | static bfd_vma cygwin_load_end; |
| 69 | |
| 70 | static int have_saved_context; /* True if we've saved context from a cygwin signal. */ |
| 71 | static CONTEXT saved_context; /* Containes the saved context from a cygwin signal. */ |
| 72 | |
| 73 | /* If we're not using the old Cygwin header file set, define the |
| 74 | following which never should have been in the generic Win32 API |
| 75 | headers in the first place since they were our own invention... */ |
| 76 | #ifndef _GNU_H_WINDOWS_H |
| 77 | enum |
| 78 | { |
| 79 | FLAG_TRACE_BIT = 0x100, |
| 80 | CONTEXT_DEBUGGER = (CONTEXT_FULL | CONTEXT_FLOATING_POINT) |
| 81 | }; |
| 82 | #endif |
| 83 | #include <sys/procfs.h> |
| 84 | #include <psapi.h> |
| 85 | |
| 86 | #define CONTEXT_DEBUGGER_DR CONTEXT_DEBUGGER | CONTEXT_DEBUG_REGISTERS \ |
| 87 | | CONTEXT_EXTENDED_REGISTERS |
| 88 | |
| 89 | static unsigned dr[8]; |
| 90 | static int debug_registers_changed; |
| 91 | static int debug_registers_used; |
| 92 | |
| 93 | /* The string sent by cygwin when it processes a signal. |
| 94 | FIXME: This should be in a cygwin include file. */ |
| 95 | #ifndef _CYGWIN_SIGNAL_STRING |
| 96 | #define _CYGWIN_SIGNAL_STRING "cYgSiGw00f" |
| 97 | #endif |
| 98 | |
| 99 | #define CHECK(x) check (x, __FILE__,__LINE__) |
| 100 | #define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x |
| 101 | #define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x |
| 102 | #define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x |
| 103 | #define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x |
| 104 | |
| 105 | static void win32_stop (void); |
| 106 | static int win32_win32_thread_alive (ptid_t); |
| 107 | static void win32_kill_inferior (void); |
| 108 | |
| 109 | static enum target_signal last_sig = TARGET_SIGNAL_0; |
| 110 | /* Set if a signal was received from the debugged process */ |
| 111 | |
| 112 | /* Thread information structure used to track information that is |
| 113 | not available in gdb's thread structure. */ |
| 114 | typedef struct thread_info_struct |
| 115 | { |
| 116 | struct thread_info_struct *next; |
| 117 | DWORD id; |
| 118 | HANDLE h; |
| 119 | char *name; |
| 120 | int suspend_count; |
| 121 | int reload_context; |
| 122 | CONTEXT context; |
| 123 | STACKFRAME sf; |
| 124 | } |
| 125 | thread_info; |
| 126 | |
| 127 | static thread_info thread_head; |
| 128 | |
| 129 | /* The process and thread handles for the above context. */ |
| 130 | |
| 131 | static DEBUG_EVENT current_event; /* The current debug event from |
| 132 | WaitForDebugEvent */ |
| 133 | static HANDLE current_process_handle; /* Currently executing process */ |
| 134 | static thread_info *current_thread; /* Info on currently selected thread */ |
| 135 | static DWORD main_thread_id; /* Thread ID of the main thread */ |
| 136 | |
| 137 | /* Counts of things. */ |
| 138 | static int exception_count = 0; |
| 139 | static int event_count = 0; |
| 140 | static int saw_create; |
| 141 | |
| 142 | /* User options. */ |
| 143 | static int new_console = 0; |
| 144 | static int cygwin_exceptions = 0; |
| 145 | static int new_group = 1; |
| 146 | static int debug_exec = 0; /* show execution */ |
| 147 | static int debug_events = 0; /* show events from kernel */ |
| 148 | static int debug_memory = 0; /* show target memory accesses */ |
| 149 | static int debug_exceptions = 0; /* show target exceptions */ |
| 150 | static int useshell = 0; /* use shell for subprocesses */ |
| 151 | |
| 152 | /* This vector maps GDB's idea of a register's number into an address |
| 153 | in the win32 exception context vector. |
| 154 | |
| 155 | It also contains the bit mask needed to load the register in question. |
| 156 | |
| 157 | One day we could read a reg, we could inspect the context we |
| 158 | already have loaded, if it doesn't have the bit set that we need, |
| 159 | we read that set of registers in using GetThreadContext. If the |
| 160 | context already contains what we need, we just unpack it. Then to |
| 161 | write a register, first we have to ensure that the context contains |
| 162 | the other regs of the group, and then we copy the info in and set |
| 163 | out bit. */ |
| 164 | |
| 165 | #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x)) |
| 166 | static const int mappings[] = |
| 167 | { |
| 168 | context_offset (Eax), |
| 169 | context_offset (Ecx), |
| 170 | context_offset (Edx), |
| 171 | context_offset (Ebx), |
| 172 | context_offset (Esp), |
| 173 | context_offset (Ebp), |
| 174 | context_offset (Esi), |
| 175 | context_offset (Edi), |
| 176 | context_offset (Eip), |
| 177 | context_offset (EFlags), |
| 178 | context_offset (SegCs), |
| 179 | context_offset (SegSs), |
| 180 | context_offset (SegDs), |
| 181 | context_offset (SegEs), |
| 182 | context_offset (SegFs), |
| 183 | context_offset (SegGs), |
| 184 | context_offset (FloatSave.RegisterArea[0 * 10]), |
| 185 | context_offset (FloatSave.RegisterArea[1 * 10]), |
| 186 | context_offset (FloatSave.RegisterArea[2 * 10]), |
| 187 | context_offset (FloatSave.RegisterArea[3 * 10]), |
| 188 | context_offset (FloatSave.RegisterArea[4 * 10]), |
| 189 | context_offset (FloatSave.RegisterArea[5 * 10]), |
| 190 | context_offset (FloatSave.RegisterArea[6 * 10]), |
| 191 | context_offset (FloatSave.RegisterArea[7 * 10]), |
| 192 | context_offset (FloatSave.ControlWord), |
| 193 | context_offset (FloatSave.StatusWord), |
| 194 | context_offset (FloatSave.TagWord), |
| 195 | context_offset (FloatSave.ErrorSelector), |
| 196 | context_offset (FloatSave.ErrorOffset), |
| 197 | context_offset (FloatSave.DataSelector), |
| 198 | context_offset (FloatSave.DataOffset), |
| 199 | context_offset (FloatSave.ErrorSelector) |
| 200 | /* XMM0-7 */ , |
| 201 | context_offset (ExtendedRegisters[10*16]), |
| 202 | context_offset (ExtendedRegisters[11*16]), |
| 203 | context_offset (ExtendedRegisters[12*16]), |
| 204 | context_offset (ExtendedRegisters[13*16]), |
| 205 | context_offset (ExtendedRegisters[14*16]), |
| 206 | context_offset (ExtendedRegisters[15*16]), |
| 207 | context_offset (ExtendedRegisters[16*16]), |
| 208 | context_offset (ExtendedRegisters[17*16]), |
| 209 | /* MXCSR */ |
| 210 | context_offset (ExtendedRegisters[24]) |
| 211 | }; |
| 212 | |
| 213 | #undef context_offset |
| 214 | |
| 215 | /* This vector maps the target's idea of an exception (extracted |
| 216 | from the DEBUG_EVENT structure) to GDB's idea. */ |
| 217 | |
| 218 | struct xlate_exception |
| 219 | { |
| 220 | int them; |
| 221 | enum target_signal us; |
| 222 | }; |
| 223 | |
| 224 | static const struct xlate_exception |
| 225 | xlate[] = |
| 226 | { |
| 227 | {EXCEPTION_ACCESS_VIOLATION, TARGET_SIGNAL_SEGV}, |
| 228 | {STATUS_STACK_OVERFLOW, TARGET_SIGNAL_SEGV}, |
| 229 | {EXCEPTION_BREAKPOINT, TARGET_SIGNAL_TRAP}, |
| 230 | {DBG_CONTROL_C, TARGET_SIGNAL_INT}, |
| 231 | {EXCEPTION_SINGLE_STEP, TARGET_SIGNAL_TRAP}, |
| 232 | {STATUS_FLOAT_DIVIDE_BY_ZERO, TARGET_SIGNAL_FPE}, |
| 233 | {-1, -1}}; |
| 234 | |
| 235 | static void |
| 236 | check (BOOL ok, const char *file, int line) |
| 237 | { |
| 238 | if (!ok) |
| 239 | printf_filtered ("error return %s:%d was %lu\n", file, line, |
| 240 | GetLastError ()); |
| 241 | } |
| 242 | |
| 243 | /* Find a thread record given a thread id. |
| 244 | If get_context then also retrieve the context for this |
| 245 | thread. */ |
| 246 | static thread_info * |
| 247 | thread_rec (DWORD id, int get_context) |
| 248 | { |
| 249 | thread_info *th; |
| 250 | |
| 251 | for (th = &thread_head; (th = th->next) != NULL;) |
| 252 | if (th->id == id) |
| 253 | { |
| 254 | if (!th->suspend_count && get_context) |
| 255 | { |
| 256 | if (get_context > 0 && id != current_event.dwThreadId) |
| 257 | th->suspend_count = SuspendThread (th->h) + 1; |
| 258 | else if (get_context < 0) |
| 259 | th->suspend_count = -1; |
| 260 | th->reload_context = 1; |
| 261 | } |
| 262 | return th; |
| 263 | } |
| 264 | |
| 265 | return NULL; |
| 266 | } |
| 267 | |
| 268 | /* Add a thread to the thread list */ |
| 269 | static thread_info * |
| 270 | win32_add_thread (DWORD id, HANDLE h) |
| 271 | { |
| 272 | thread_info *th; |
| 273 | |
| 274 | if ((th = thread_rec (id, FALSE))) |
| 275 | return th; |
| 276 | |
| 277 | th = XZALLOC (thread_info); |
| 278 | th->id = id; |
| 279 | th->h = h; |
| 280 | th->next = thread_head.next; |
| 281 | thread_head.next = th; |
| 282 | add_thread (pid_to_ptid (id)); |
| 283 | /* Set the debug registers for the new thread in they are used. */ |
| 284 | if (debug_registers_used) |
| 285 | { |
| 286 | /* Only change the value of the debug registers. */ |
| 287 | th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; |
| 288 | CHECK (GetThreadContext (th->h, &th->context)); |
| 289 | th->context.Dr0 = dr[0]; |
| 290 | th->context.Dr1 = dr[1]; |
| 291 | th->context.Dr2 = dr[2]; |
| 292 | th->context.Dr3 = dr[3]; |
| 293 | /* th->context.Dr6 = dr[6]; |
| 294 | FIXME: should we set dr6 also ?? */ |
| 295 | th->context.Dr7 = dr[7]; |
| 296 | CHECK (SetThreadContext (th->h, &th->context)); |
| 297 | th->context.ContextFlags = 0; |
| 298 | } |
| 299 | return th; |
| 300 | } |
| 301 | |
| 302 | /* Clear out any old thread list and reintialize it to a |
| 303 | pristine state. */ |
| 304 | static void |
| 305 | win32_init_thread_list (void) |
| 306 | { |
| 307 | thread_info *th = &thread_head; |
| 308 | |
| 309 | DEBUG_EVENTS (("gdb: win32_init_thread_list\n")); |
| 310 | init_thread_list (); |
| 311 | while (th->next != NULL) |
| 312 | { |
| 313 | thread_info *here = th->next; |
| 314 | th->next = here->next; |
| 315 | (void) CloseHandle (here->h); |
| 316 | xfree (here); |
| 317 | } |
| 318 | thread_head.next = NULL; |
| 319 | } |
| 320 | |
| 321 | /* Delete a thread from the list of threads */ |
| 322 | static void |
| 323 | win32_delete_thread (DWORD id) |
| 324 | { |
| 325 | thread_info *th; |
| 326 | |
| 327 | if (info_verbose) |
| 328 | printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (pid_to_ptid (id))); |
| 329 | delete_thread (pid_to_ptid (id)); |
| 330 | |
| 331 | for (th = &thread_head; |
| 332 | th->next != NULL && th->next->id != id; |
| 333 | th = th->next) |
| 334 | continue; |
| 335 | |
| 336 | if (th->next != NULL) |
| 337 | { |
| 338 | thread_info *here = th->next; |
| 339 | th->next = here->next; |
| 340 | CloseHandle (here->h); |
| 341 | xfree (here); |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | static void |
| 346 | do_win32_fetch_inferior_registers (struct regcache *regcache, int r) |
| 347 | { |
| 348 | char *context_offset = ((char *) ¤t_thread->context) + mappings[r]; |
| 349 | long l; |
| 350 | |
| 351 | if (!current_thread) |
| 352 | return; /* Windows sometimes uses a non-existent thread id in its |
| 353 | events */ |
| 354 | |
| 355 | if (current_thread->reload_context) |
| 356 | { |
| 357 | #ifdef __COPY_CONTEXT_SIZE |
| 358 | if (have_saved_context) |
| 359 | { |
| 360 | /* Lie about where the program actually is stopped since cygwin has informed us that |
| 361 | we should consider the signal to have occurred at another location which is stored |
| 362 | in "saved_context. */ |
| 363 | memcpy (¤t_thread->context, &saved_context, __COPY_CONTEXT_SIZE); |
| 364 | have_saved_context = 0; |
| 365 | } |
| 366 | else |
| 367 | #endif |
| 368 | { |
| 369 | thread_info *th = current_thread; |
| 370 | th->context.ContextFlags = CONTEXT_DEBUGGER_DR; |
| 371 | GetThreadContext (th->h, &th->context); |
| 372 | /* Copy dr values from that thread. */ |
| 373 | dr[0] = th->context.Dr0; |
| 374 | dr[1] = th->context.Dr1; |
| 375 | dr[2] = th->context.Dr2; |
| 376 | dr[3] = th->context.Dr3; |
| 377 | dr[6] = th->context.Dr6; |
| 378 | dr[7] = th->context.Dr7; |
| 379 | } |
| 380 | current_thread->reload_context = 0; |
| 381 | } |
| 382 | |
| 383 | #define I387_ST0_REGNUM I386_ST0_REGNUM |
| 384 | |
| 385 | if (r == I387_FISEG_REGNUM) |
| 386 | { |
| 387 | l = *((long *) context_offset) & 0xffff; |
| 388 | regcache_raw_supply (regcache, r, (char *) &l); |
| 389 | } |
| 390 | else if (r == I387_FOP_REGNUM) |
| 391 | { |
| 392 | l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1); |
| 393 | regcache_raw_supply (regcache, r, (char *) &l); |
| 394 | } |
| 395 | else if (r >= 0) |
| 396 | regcache_raw_supply (regcache, r, context_offset); |
| 397 | else |
| 398 | { |
| 399 | for (r = 0; r < gdbarch_num_regs (current_gdbarch); r++) |
| 400 | do_win32_fetch_inferior_registers (regcache, r); |
| 401 | } |
| 402 | |
| 403 | #undef I387_ST0_REGNUM |
| 404 | } |
| 405 | |
| 406 | static void |
| 407 | win32_fetch_inferior_registers (struct regcache *regcache, int r) |
| 408 | { |
| 409 | current_thread = thread_rec (PIDGET (inferior_ptid), TRUE); |
| 410 | /* Check if current_thread exists. Windows sometimes uses a non-existent |
| 411 | thread id in its events */ |
| 412 | if (current_thread) |
| 413 | do_win32_fetch_inferior_registers (regcache, r); |
| 414 | } |
| 415 | |
| 416 | static void |
| 417 | do_win32_store_inferior_registers (const struct regcache *regcache, int r) |
| 418 | { |
| 419 | if (!current_thread) |
| 420 | /* Windows sometimes uses a non-existent thread id in its events */; |
| 421 | else if (r >= 0) |
| 422 | regcache_raw_collect (regcache, r, |
| 423 | ((char *) ¤t_thread->context) + mappings[r]); |
| 424 | else |
| 425 | { |
| 426 | for (r = 0; r < gdbarch_num_regs (current_gdbarch); r++) |
| 427 | do_win32_store_inferior_registers (regcache, r); |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | /* Store a new register value into the current thread context */ |
| 432 | static void |
| 433 | win32_store_inferior_registers (struct regcache *regcache, int r) |
| 434 | { |
| 435 | current_thread = thread_rec (PIDGET (inferior_ptid), TRUE); |
| 436 | /* Check if current_thread exists. Windows sometimes uses a non-existent |
| 437 | thread id in its events */ |
| 438 | if (current_thread) |
| 439 | do_win32_store_inferior_registers (regcache, r); |
| 440 | } |
| 441 | |
| 442 | static int psapi_loaded = 0; |
| 443 | static HMODULE psapi_module_handle = NULL; |
| 444 | static BOOL WINAPI (*psapi_EnumProcessModules) (HANDLE, HMODULE *, DWORD, LPDWORD) = NULL; |
| 445 | static BOOL WINAPI (*psapi_GetModuleInformation) (HANDLE, HMODULE, LPMODULEINFO, DWORD) = NULL; |
| 446 | static DWORD WINAPI (*psapi_GetModuleFileNameExA) (HANDLE, HMODULE, LPSTR, DWORD) = NULL; |
| 447 | |
| 448 | static int |
| 449 | psapi_get_dll_name (DWORD BaseAddress, char *dll_name_ret) |
| 450 | { |
| 451 | DWORD len; |
| 452 | MODULEINFO mi; |
| 453 | int i; |
| 454 | HMODULE dh_buf[1]; |
| 455 | HMODULE *DllHandle = dh_buf; |
| 456 | DWORD cbNeeded; |
| 457 | BOOL ok; |
| 458 | |
| 459 | if (!psapi_loaded || |
| 460 | psapi_EnumProcessModules == NULL || |
| 461 | psapi_GetModuleInformation == NULL || |
| 462 | psapi_GetModuleFileNameExA == NULL) |
| 463 | { |
| 464 | if (psapi_loaded) |
| 465 | goto failed; |
| 466 | psapi_loaded = 1; |
| 467 | psapi_module_handle = LoadLibrary ("psapi.dll"); |
| 468 | if (!psapi_module_handle) |
| 469 | { |
| 470 | /* printf_unfiltered ("error loading psapi.dll: %u", GetLastError ()); */ |
| 471 | goto failed; |
| 472 | } |
| 473 | psapi_EnumProcessModules = GetProcAddress (psapi_module_handle, "EnumProcessModules"); |
| 474 | psapi_GetModuleInformation = GetProcAddress (psapi_module_handle, "GetModuleInformation"); |
| 475 | psapi_GetModuleFileNameExA = (void *) GetProcAddress (psapi_module_handle, |
| 476 | "GetModuleFileNameExA"); |
| 477 | if (psapi_EnumProcessModules == NULL || |
| 478 | psapi_GetModuleInformation == NULL || |
| 479 | psapi_GetModuleFileNameExA == NULL) |
| 480 | goto failed; |
| 481 | } |
| 482 | |
| 483 | cbNeeded = 0; |
| 484 | ok = (*psapi_EnumProcessModules) (current_process_handle, |
| 485 | DllHandle, |
| 486 | sizeof (HMODULE), |
| 487 | &cbNeeded); |
| 488 | |
| 489 | if (!ok || !cbNeeded) |
| 490 | goto failed; |
| 491 | |
| 492 | DllHandle = (HMODULE *) alloca (cbNeeded); |
| 493 | if (!DllHandle) |
| 494 | goto failed; |
| 495 | |
| 496 | ok = (*psapi_EnumProcessModules) (current_process_handle, |
| 497 | DllHandle, |
| 498 | cbNeeded, |
| 499 | &cbNeeded); |
| 500 | if (!ok) |
| 501 | goto failed; |
| 502 | |
| 503 | for (i = 0; i < (int) (cbNeeded / sizeof (HMODULE)); i++) |
| 504 | { |
| 505 | if (!(*psapi_GetModuleInformation) (current_process_handle, |
| 506 | DllHandle[i], |
| 507 | &mi, |
| 508 | sizeof (mi))) |
| 509 | error (_("Can't get module info")); |
| 510 | |
| 511 | len = (*psapi_GetModuleFileNameExA) (current_process_handle, |
| 512 | DllHandle[i], |
| 513 | dll_name_ret, |
| 514 | MAX_PATH); |
| 515 | if (len == 0) |
| 516 | error (_("Error getting dll name: %u."), (unsigned) GetLastError ()); |
| 517 | |
| 518 | if ((DWORD) (mi.lpBaseOfDll) == BaseAddress) |
| 519 | return 1; |
| 520 | } |
| 521 | |
| 522 | failed: |
| 523 | dll_name_ret[0] = '\0'; |
| 524 | return 0; |
| 525 | } |
| 526 | |
| 527 | /* Encapsulate the information required in a call to |
| 528 | symbol_file_add_args */ |
| 529 | struct safe_symbol_file_add_args |
| 530 | { |
| 531 | char *name; |
| 532 | int from_tty; |
| 533 | struct section_addr_info *addrs; |
| 534 | int mainline; |
| 535 | int flags; |
| 536 | struct ui_file *err, *out; |
| 537 | struct objfile *ret; |
| 538 | }; |
| 539 | |
| 540 | /* Maintain a linked list of "so" information. */ |
| 541 | struct lm_info |
| 542 | { |
| 543 | DWORD load_addr; |
| 544 | }; |
| 545 | |
| 546 | static struct so_list solib_start, *solib_end; |
| 547 | |
| 548 | /* Call symbol_file_add with stderr redirected. We don't care if there |
| 549 | are errors. */ |
| 550 | static int |
| 551 | safe_symbol_file_add_stub (void *argv) |
| 552 | { |
| 553 | #define p ((struct safe_symbol_file_add_args *) argv) |
| 554 | struct so_list *so = &solib_start; |
| 555 | |
| 556 | p->ret = symbol_file_add (p->name, p->from_tty, p->addrs, p->mainline, p->flags); |
| 557 | return !!p->ret; |
| 558 | #undef p |
| 559 | } |
| 560 | |
| 561 | /* Restore gdb's stderr after calling symbol_file_add */ |
| 562 | static void |
| 563 | safe_symbol_file_add_cleanup (void *p) |
| 564 | { |
| 565 | #define sp ((struct safe_symbol_file_add_args *)p) |
| 566 | gdb_flush (gdb_stderr); |
| 567 | gdb_flush (gdb_stdout); |
| 568 | ui_file_delete (gdb_stderr); |
| 569 | ui_file_delete (gdb_stdout); |
| 570 | gdb_stderr = sp->err; |
| 571 | gdb_stdout = sp->out; |
| 572 | #undef sp |
| 573 | } |
| 574 | |
| 575 | /* symbol_file_add wrapper that prevents errors from being displayed. */ |
| 576 | static struct objfile * |
| 577 | safe_symbol_file_add (char *name, int from_tty, |
| 578 | struct section_addr_info *addrs, |
| 579 | int mainline, int flags) |
| 580 | { |
| 581 | struct safe_symbol_file_add_args p; |
| 582 | struct cleanup *cleanup; |
| 583 | |
| 584 | cleanup = make_cleanup (safe_symbol_file_add_cleanup, &p); |
| 585 | |
| 586 | p.err = gdb_stderr; |
| 587 | p.out = gdb_stdout; |
| 588 | gdb_flush (gdb_stderr); |
| 589 | gdb_flush (gdb_stdout); |
| 590 | gdb_stderr = ui_file_new (); |
| 591 | gdb_stdout = ui_file_new (); |
| 592 | p.name = name; |
| 593 | p.from_tty = from_tty; |
| 594 | p.addrs = addrs; |
| 595 | p.mainline = mainline; |
| 596 | p.flags = flags; |
| 597 | catch_errors (safe_symbol_file_add_stub, &p, "", RETURN_MASK_ERROR); |
| 598 | |
| 599 | do_cleanups (cleanup); |
| 600 | return p.ret; |
| 601 | } |
| 602 | |
| 603 | /* Get the loaded address of all sections, given that .text was loaded |
| 604 | at text_load. Assumes that all sections are subject to the same |
| 605 | relocation offset. Returns NULL if problems occur or if the |
| 606 | sections were not relocated. */ |
| 607 | |
| 608 | static struct section_addr_info * |
| 609 | get_relocated_section_addrs (bfd *abfd, CORE_ADDR text_load) |
| 610 | { |
| 611 | struct section_addr_info *result = NULL; |
| 612 | int section_count = bfd_count_sections (abfd); |
| 613 | asection *text_section = bfd_get_section_by_name (abfd, ".text"); |
| 614 | CORE_ADDR text_vma; |
| 615 | |
| 616 | if (!text_section) |
| 617 | { |
| 618 | /* Couldn't get the .text section. Weird. */ |
| 619 | } |
| 620 | else if (text_load == (text_vma = bfd_get_section_vma (abfd, text_section))) |
| 621 | { |
| 622 | /* DLL wasn't relocated. */ |
| 623 | } |
| 624 | else |
| 625 | { |
| 626 | /* Figure out all sections' loaded addresses. The offset here is |
| 627 | such that taking a bfd_get_section_vma() result and adding |
| 628 | offset will give the real load address of the section. */ |
| 629 | |
| 630 | CORE_ADDR offset = text_load - text_vma; |
| 631 | |
| 632 | struct section_table *table_start = NULL; |
| 633 | struct section_table *table_end = NULL; |
| 634 | struct section_table *iter = NULL; |
| 635 | |
| 636 | build_section_table (abfd, &table_start, &table_end); |
| 637 | |
| 638 | for (iter = table_start; iter < table_end; ++iter) |
| 639 | { |
| 640 | /* Relocated addresses. */ |
| 641 | iter->addr += offset; |
| 642 | iter->endaddr += offset; |
| 643 | } |
| 644 | |
| 645 | result = build_section_addr_info_from_section_table (table_start, |
| 646 | table_end); |
| 647 | |
| 648 | xfree (table_start); |
| 649 | } |
| 650 | |
| 651 | return result; |
| 652 | } |
| 653 | |
| 654 | /* Add DLL symbol information. */ |
| 655 | static void |
| 656 | solib_symbols_add (struct so_list *so, CORE_ADDR load_addr) |
| 657 | { |
| 658 | struct section_addr_info *addrs = NULL; |
| 659 | static struct objfile *result = NULL; |
| 660 | char *name = so->so_name; |
| 661 | bfd *abfd = NULL; |
| 662 | char *p; |
| 663 | |
| 664 | /* The symbols in a dll are offset by 0x1000, which is the |
| 665 | the offset from 0 of the first byte in an image - because |
| 666 | of the file header and the section alignment. */ |
| 667 | |
| 668 | if (!name || !name[0]) |
| 669 | return; |
| 670 | |
| 671 | abfd = bfd_openr (name, "pei-i386"); |
| 672 | |
| 673 | if (!abfd) |
| 674 | { |
| 675 | /* pei failed - try pe */ |
| 676 | abfd = bfd_openr (name, "pe-i386"); |
| 677 | } |
| 678 | |
| 679 | if (abfd) |
| 680 | { |
| 681 | if (bfd_check_format (abfd, bfd_object)) |
| 682 | addrs = get_relocated_section_addrs (abfd, load_addr); |
| 683 | } |
| 684 | |
| 685 | if (addrs) |
| 686 | { |
| 687 | result = safe_symbol_file_add (name, 0, addrs, 0, OBJF_SHARED); |
| 688 | free_section_addr_info (addrs); |
| 689 | } |
| 690 | else |
| 691 | { |
| 692 | /* Fallback on handling just the .text section. */ |
| 693 | struct cleanup *my_cleanups; |
| 694 | |
| 695 | addrs = alloc_section_addr_info (1); |
| 696 | my_cleanups = make_cleanup (xfree, addrs); |
| 697 | addrs->other[0].name = ".text"; |
| 698 | addrs->other[0].addr = load_addr; |
| 699 | |
| 700 | result = safe_symbol_file_add (name, 0, addrs, 0, OBJF_SHARED); |
| 701 | do_cleanups (my_cleanups); |
| 702 | } |
| 703 | |
| 704 | p = strchr (so->so_name, '\0') - (sizeof ("/cygwin1.dll") - 1); |
| 705 | if (p >= so->so_name && strcasecmp (p, "/cygwin1.dll") == 0) |
| 706 | { |
| 707 | asection *text = bfd_get_section_by_name (abfd, ".text"); |
| 708 | cygwin_load_start = bfd_section_vma (abfd, text); |
| 709 | cygwin_load_end = cygwin_load_start + bfd_section_size (abfd, text); |
| 710 | } |
| 711 | |
| 712 | bfd_close (abfd); |
| 713 | |
| 714 | so->symbols_loaded = !!result; |
| 715 | return; |
| 716 | } |
| 717 | |
| 718 | static char * |
| 719 | register_loaded_dll (const char *name, DWORD load_addr, int readsyms) |
| 720 | { |
| 721 | struct so_list *so; |
| 722 | char buf[MAX_PATH + 1]; |
| 723 | char cwd[MAX_PATH + 1]; |
| 724 | char *p; |
| 725 | WIN32_FIND_DATA w32_fd; |
| 726 | HANDLE h = FindFirstFile(name, &w32_fd); |
| 727 | MEMORY_BASIC_INFORMATION m; |
| 728 | size_t len; |
| 729 | |
| 730 | if (h == INVALID_HANDLE_VALUE) |
| 731 | strcpy (buf, name); |
| 732 | else |
| 733 | { |
| 734 | FindClose (h); |
| 735 | strcpy (buf, name); |
| 736 | if (GetCurrentDirectory (MAX_PATH + 1, cwd)) |
| 737 | { |
| 738 | p = strrchr (buf, '\\'); |
| 739 | if (p) |
| 740 | p[1] = '\0'; |
| 741 | SetCurrentDirectory (buf); |
| 742 | GetFullPathName (w32_fd.cFileName, MAX_PATH, buf, &p); |
| 743 | SetCurrentDirectory (cwd); |
| 744 | } |
| 745 | } |
| 746 | |
| 747 | if (strcasecmp (buf, "ntdll.dll") == 0) |
| 748 | { |
| 749 | GetSystemDirectory (buf, sizeof (buf)); |
| 750 | strcat (buf, "\\ntdll.dll"); |
| 751 | } |
| 752 | so = XZALLOC (struct so_list); |
| 753 | so->lm_info = (struct lm_info *) xmalloc (sizeof (struct lm_info)); |
| 754 | so->lm_info->load_addr = load_addr; |
| 755 | cygwin_conv_to_posix_path (buf, so->so_name); |
| 756 | strcpy (so->so_original_name, so->so_name); |
| 757 | |
| 758 | solib_end->next = so; |
| 759 | solib_end = so; |
| 760 | len = strlen (so->so_name); |
| 761 | if (readsyms) |
| 762 | solib_symbols_add (so, (CORE_ADDR) load_addr); |
| 763 | |
| 764 | return so->so_name; |
| 765 | } |
| 766 | |
| 767 | static char * |
| 768 | get_image_name (HANDLE h, void *address, int unicode) |
| 769 | { |
| 770 | static char buf[(2 * MAX_PATH) + 1]; |
| 771 | DWORD size = unicode ? sizeof (WCHAR) : sizeof (char); |
| 772 | char *address_ptr; |
| 773 | int len = 0; |
| 774 | char b[2]; |
| 775 | DWORD done; |
| 776 | |
| 777 | /* Attempt to read the name of the dll that was detected. |
| 778 | This is documented to work only when actively debugging |
| 779 | a program. It will not work for attached processes. */ |
| 780 | if (address == NULL) |
| 781 | return NULL; |
| 782 | |
| 783 | /* See if we could read the address of a string, and that the |
| 784 | address isn't null. */ |
| 785 | if (!ReadProcessMemory (h, address, &address_ptr, sizeof (address_ptr), &done) |
| 786 | || done != sizeof (address_ptr) || !address_ptr) |
| 787 | return NULL; |
| 788 | |
| 789 | /* Find the length of the string */ |
| 790 | while (ReadProcessMemory (h, address_ptr + len++ * size, &b, size, &done) |
| 791 | && (b[0] != 0 || b[size - 1] != 0) && done == size) |
| 792 | continue; |
| 793 | |
| 794 | if (!unicode) |
| 795 | ReadProcessMemory (h, address_ptr, buf, len, &done); |
| 796 | else |
| 797 | { |
| 798 | WCHAR *unicode_address = (WCHAR *) alloca (len * sizeof (WCHAR)); |
| 799 | ReadProcessMemory (h, address_ptr, unicode_address, len * sizeof (WCHAR), |
| 800 | &done); |
| 801 | |
| 802 | WideCharToMultiByte (CP_ACP, 0, unicode_address, len, buf, len, 0, 0); |
| 803 | } |
| 804 | |
| 805 | return buf; |
| 806 | } |
| 807 | |
| 808 | /* Wait for child to do something. Return pid of child, or -1 in case |
| 809 | of error; store status through argument pointer OURSTATUS. */ |
| 810 | static int |
| 811 | handle_load_dll (void *dummy) |
| 812 | { |
| 813 | LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll; |
| 814 | char dll_buf[MAX_PATH + 1]; |
| 815 | char *dll_name = NULL; |
| 816 | |
| 817 | dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0'; |
| 818 | |
| 819 | if (!psapi_get_dll_name ((DWORD) (event->lpBaseOfDll), dll_buf)) |
| 820 | dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0'; |
| 821 | |
| 822 | dll_name = dll_buf; |
| 823 | |
| 824 | if (*dll_name == '\0') |
| 825 | dll_name = get_image_name (current_process_handle, event->lpImageName, event->fUnicode); |
| 826 | if (!dll_name) |
| 827 | return 1; |
| 828 | |
| 829 | register_loaded_dll (dll_name, (DWORD) event->lpBaseOfDll + 0x1000, auto_solib_add); |
| 830 | |
| 831 | return 1; |
| 832 | } |
| 833 | |
| 834 | static void |
| 835 | win32_free_so (struct so_list *so) |
| 836 | { |
| 837 | if (so->lm_info) |
| 838 | xfree (so->lm_info); |
| 839 | } |
| 840 | |
| 841 | static void |
| 842 | win32_relocate_section_addresses (struct so_list *so, |
| 843 | struct section_table *sec) |
| 844 | { |
| 845 | /* FIXME */ |
| 846 | return; |
| 847 | } |
| 848 | |
| 849 | static void |
| 850 | win32_solib_create_inferior_hook (void) |
| 851 | { |
| 852 | solib_add (NULL, 0, NULL, auto_solib_add); |
| 853 | return; |
| 854 | } |
| 855 | |
| 856 | static int |
| 857 | handle_unload_dll (void *dummy) |
| 858 | { |
| 859 | DWORD lpBaseOfDll = (DWORD) current_event.u.UnloadDll.lpBaseOfDll + 0x1000; |
| 860 | struct so_list *so; |
| 861 | |
| 862 | for (so = &solib_start; so->next != NULL; so = so->next) |
| 863 | if (so->next->lm_info->load_addr == lpBaseOfDll) |
| 864 | { |
| 865 | struct so_list *sodel = so->next; |
| 866 | so->next = sodel->next; |
| 867 | if (!so->next) |
| 868 | solib_end = so; |
| 869 | free_so (sodel); |
| 870 | solib_add (NULL, 0, NULL, auto_solib_add); |
| 871 | return 1; |
| 872 | } |
| 873 | |
| 874 | error (_("Error: dll starting at 0x%lx not found."), (DWORD) lpBaseOfDll); |
| 875 | |
| 876 | return 0; |
| 877 | } |
| 878 | |
| 879 | /* Clear list of loaded DLLs. */ |
| 880 | static void |
| 881 | win32_clear_solib (void) |
| 882 | { |
| 883 | solib_start.next = NULL; |
| 884 | solib_end = &solib_start; |
| 885 | } |
| 886 | |
| 887 | static void |
| 888 | win32_special_symbol_handling (void) |
| 889 | { |
| 890 | return; |
| 891 | } |
| 892 | |
| 893 | /* Load DLL symbol info. */ |
| 894 | void |
| 895 | dll_symbol_command (char *args, int from_tty) |
| 896 | { |
| 897 | int n; |
| 898 | dont_repeat (); |
| 899 | |
| 900 | if (args == NULL) |
| 901 | error (_("dll-symbols requires a file name")); |
| 902 | |
| 903 | n = strlen (args); |
| 904 | if (n > 4 && strcasecmp (args + n - 4, ".dll") != 0) |
| 905 | { |
| 906 | char *newargs = (char *) alloca (n + 4 + 1); |
| 907 | strcpy (newargs, args); |
| 908 | strcat (newargs, ".dll"); |
| 909 | args = newargs; |
| 910 | } |
| 911 | |
| 912 | safe_symbol_file_add (args, from_tty, NULL, 0, OBJF_SHARED | OBJF_USERLOADED); |
| 913 | } |
| 914 | |
| 915 | /* Handle DEBUG_STRING output from child process. |
| 916 | Cygwin prepends its messages with a "cygwin:". Interpret this as |
| 917 | a Cygwin signal. Otherwise just print the string as a warning. */ |
| 918 | static int |
| 919 | handle_output_debug_string (struct target_waitstatus *ourstatus) |
| 920 | { |
| 921 | char *s = NULL; |
| 922 | int retval = 0; |
| 923 | |
| 924 | if (!target_read_string |
| 925 | ((CORE_ADDR) current_event.u.DebugString.lpDebugStringData, &s, 1024, 0) |
| 926 | || !s || !*s) |
| 927 | /* nothing to do */; |
| 928 | else if (strncmp (s, _CYGWIN_SIGNAL_STRING, sizeof (_CYGWIN_SIGNAL_STRING) - 1) != 0) |
| 929 | { |
| 930 | if (strncmp (s, "cYg", 3) != 0) |
| 931 | warning (("%s"), s); |
| 932 | } |
| 933 | #ifdef __COPY_CONTEXT_SIZE |
| 934 | else |
| 935 | { |
| 936 | /* Got a cygwin signal marker. A cygwin signal is followed by the signal number |
| 937 | itself and then optionally followed by the thread id and address to saved context |
| 938 | within the DLL. If these are supplied, then the given thread is assumed to have |
| 939 | issued the signal and the context from the thread is assumed to be stored at the |
| 940 | given address in the inferior. Tell gdb to treat this like a real signal. */ |
| 941 | char *p; |
| 942 | int sig = strtol (s + sizeof (_CYGWIN_SIGNAL_STRING) - 1, &p, 0); |
| 943 | int gotasig = target_signal_from_host (sig); |
| 944 | ourstatus->value.sig = gotasig; |
| 945 | if (gotasig) |
| 946 | { |
| 947 | LPCVOID x; |
| 948 | DWORD n; |
| 949 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 950 | retval = strtoul (p, &p, 0); |
| 951 | if (!retval) |
| 952 | retval = main_thread_id; |
| 953 | else if ((x = (LPCVOID) strtoul (p, &p, 0)) |
| 954 | && ReadProcessMemory (current_process_handle, x, |
| 955 | &saved_context, __COPY_CONTEXT_SIZE, &n) |
| 956 | && n == __COPY_CONTEXT_SIZE) |
| 957 | have_saved_context = 1; |
| 958 | current_event.dwThreadId = retval; |
| 959 | } |
| 960 | } |
| 961 | #endif |
| 962 | |
| 963 | if (s) |
| 964 | xfree (s); |
| 965 | return retval; |
| 966 | } |
| 967 | |
| 968 | static int |
| 969 | display_selector (HANDLE thread, DWORD sel) |
| 970 | { |
| 971 | LDT_ENTRY info; |
| 972 | if (GetThreadSelectorEntry (thread, sel, &info)) |
| 973 | { |
| 974 | int base, limit; |
| 975 | printf_filtered ("0x%03lx: ", sel); |
| 976 | if (!info.HighWord.Bits.Pres) |
| 977 | { |
| 978 | puts_filtered ("Segment not present\n"); |
| 979 | return 0; |
| 980 | } |
| 981 | base = (info.HighWord.Bits.BaseHi << 24) + |
| 982 | (info.HighWord.Bits.BaseMid << 16) |
| 983 | + info.BaseLow; |
| 984 | limit = (info.HighWord.Bits.LimitHi << 16) + info.LimitLow; |
| 985 | if (info.HighWord.Bits.Granularity) |
| 986 | limit = (limit << 12) | 0xfff; |
| 987 | printf_filtered ("base=0x%08x limit=0x%08x", base, limit); |
| 988 | if (info.HighWord.Bits.Default_Big) |
| 989 | puts_filtered(" 32-bit "); |
| 990 | else |
| 991 | puts_filtered(" 16-bit "); |
| 992 | switch ((info.HighWord.Bits.Type & 0xf) >> 1) |
| 993 | { |
| 994 | case 0: |
| 995 | puts_filtered ("Data (Read-Only, Exp-up"); |
| 996 | break; |
| 997 | case 1: |
| 998 | puts_filtered ("Data (Read/Write, Exp-up"); |
| 999 | break; |
| 1000 | case 2: |
| 1001 | puts_filtered ("Unused segment ("); |
| 1002 | break; |
| 1003 | case 3: |
| 1004 | puts_filtered ("Data (Read/Write, Exp-down"); |
| 1005 | break; |
| 1006 | case 4: |
| 1007 | puts_filtered ("Code (Exec-Only, N.Conf"); |
| 1008 | break; |
| 1009 | case 5: |
| 1010 | puts_filtered ("Code (Exec/Read, N.Conf"); |
| 1011 | break; |
| 1012 | case 6: |
| 1013 | puts_filtered ("Code (Exec-Only, Conf"); |
| 1014 | break; |
| 1015 | case 7: |
| 1016 | puts_filtered ("Code (Exec/Read, Conf"); |
| 1017 | break; |
| 1018 | default: |
| 1019 | printf_filtered ("Unknown type 0x%x",info.HighWord.Bits.Type); |
| 1020 | } |
| 1021 | if ((info.HighWord.Bits.Type & 0x1) == 0) |
| 1022 | puts_filtered(", N.Acc"); |
| 1023 | puts_filtered (")\n"); |
| 1024 | if ((info.HighWord.Bits.Type & 0x10) == 0) |
| 1025 | puts_filtered("System selector "); |
| 1026 | printf_filtered ("Priviledge level = %d. ", info.HighWord.Bits.Dpl); |
| 1027 | if (info.HighWord.Bits.Granularity) |
| 1028 | puts_filtered ("Page granular.\n"); |
| 1029 | else |
| 1030 | puts_filtered ("Byte granular.\n"); |
| 1031 | return 1; |
| 1032 | } |
| 1033 | else |
| 1034 | { |
| 1035 | printf_filtered ("Invalid selector 0x%lx.\n",sel); |
| 1036 | return 0; |
| 1037 | } |
| 1038 | } |
| 1039 | |
| 1040 | static void |
| 1041 | display_selectors (char * args, int from_tty) |
| 1042 | { |
| 1043 | if (!current_thread) |
| 1044 | { |
| 1045 | puts_filtered ("Impossible to display selectors now.\n"); |
| 1046 | return; |
| 1047 | } |
| 1048 | if (!args) |
| 1049 | { |
| 1050 | |
| 1051 | puts_filtered ("Selector $cs\n"); |
| 1052 | display_selector (current_thread->h, |
| 1053 | current_thread->context.SegCs); |
| 1054 | puts_filtered ("Selector $ds\n"); |
| 1055 | display_selector (current_thread->h, |
| 1056 | current_thread->context.SegDs); |
| 1057 | puts_filtered ("Selector $es\n"); |
| 1058 | display_selector (current_thread->h, |
| 1059 | current_thread->context.SegEs); |
| 1060 | puts_filtered ("Selector $ss\n"); |
| 1061 | display_selector (current_thread->h, |
| 1062 | current_thread->context.SegSs); |
| 1063 | puts_filtered ("Selector $fs\n"); |
| 1064 | display_selector (current_thread->h, |
| 1065 | current_thread->context.SegFs); |
| 1066 | puts_filtered ("Selector $gs\n"); |
| 1067 | display_selector (current_thread->h, |
| 1068 | current_thread->context.SegGs); |
| 1069 | } |
| 1070 | else |
| 1071 | { |
| 1072 | int sel; |
| 1073 | sel = parse_and_eval_long (args); |
| 1074 | printf_filtered ("Selector \"%s\"\n",args); |
| 1075 | display_selector (current_thread->h, sel); |
| 1076 | } |
| 1077 | } |
| 1078 | |
| 1079 | static struct cmd_list_element *info_w32_cmdlist = NULL; |
| 1080 | |
| 1081 | static void |
| 1082 | info_w32_command (char *args, int from_tty) |
| 1083 | { |
| 1084 | help_list (info_w32_cmdlist, "info w32 ", class_info, gdb_stdout); |
| 1085 | } |
| 1086 | |
| 1087 | |
| 1088 | #define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \ |
| 1089 | printf_unfiltered ("gdb: Target exception %s at 0x%08lx\n", x, \ |
| 1090 | (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress) |
| 1091 | |
| 1092 | static int |
| 1093 | handle_exception (struct target_waitstatus *ourstatus) |
| 1094 | { |
| 1095 | thread_info *th; |
| 1096 | DWORD code = current_event.u.Exception.ExceptionRecord.ExceptionCode; |
| 1097 | |
| 1098 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 1099 | |
| 1100 | /* Record the context of the current thread */ |
| 1101 | th = thread_rec (current_event.dwThreadId, -1); |
| 1102 | |
| 1103 | switch (code) |
| 1104 | { |
| 1105 | case EXCEPTION_ACCESS_VIOLATION: |
| 1106 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ACCESS_VIOLATION"); |
| 1107 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; |
| 1108 | { |
| 1109 | /* See if the access violation happened within the cygwin DLL itself. Cygwin uses |
| 1110 | a kind of exception handling to deal with passed-in invalid addresses. gdb |
| 1111 | should not treat these as real SEGVs since they will be silently handled by |
| 1112 | cygwin. A real SEGV will (theoretically) be caught by cygwin later in the process |
| 1113 | and will be sent as a cygwin-specific-signal. So, ignore SEGVs if they show up |
| 1114 | within the text segment of the DLL itself. */ |
| 1115 | char *fn; |
| 1116 | bfd_vma addr = (bfd_vma) current_event.u.Exception.ExceptionRecord.ExceptionAddress; |
| 1117 | if ((!cygwin_exceptions && (addr >= cygwin_load_start && addr < cygwin_load_end)) |
| 1118 | || (find_pc_partial_function (addr, &fn, NULL, NULL) |
| 1119 | && strncmp (fn, "KERNEL32!IsBad", strlen ("KERNEL32!IsBad")) == 0)) |
| 1120 | return 0; |
| 1121 | } |
| 1122 | break; |
| 1123 | case STATUS_STACK_OVERFLOW: |
| 1124 | DEBUG_EXCEPTION_SIMPLE ("STATUS_STACK_OVERFLOW"); |
| 1125 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; |
| 1126 | break; |
| 1127 | case STATUS_FLOAT_DENORMAL_OPERAND: |
| 1128 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DENORMAL_OPERAND"); |
| 1129 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1130 | break; |
| 1131 | case EXCEPTION_ARRAY_BOUNDS_EXCEEDED: |
| 1132 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ARRAY_BOUNDS_EXCEEDED"); |
| 1133 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1134 | break; |
| 1135 | case STATUS_FLOAT_INEXACT_RESULT: |
| 1136 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INEXACT_RESULT"); |
| 1137 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1138 | break; |
| 1139 | case STATUS_FLOAT_INVALID_OPERATION: |
| 1140 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INVALID_OPERATION"); |
| 1141 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1142 | break; |
| 1143 | case STATUS_FLOAT_OVERFLOW: |
| 1144 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_OVERFLOW"); |
| 1145 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1146 | break; |
| 1147 | case STATUS_FLOAT_STACK_CHECK: |
| 1148 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_STACK_CHECK"); |
| 1149 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1150 | break; |
| 1151 | case STATUS_FLOAT_UNDERFLOW: |
| 1152 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_UNDERFLOW"); |
| 1153 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1154 | break; |
| 1155 | case STATUS_FLOAT_DIVIDE_BY_ZERO: |
| 1156 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DIVIDE_BY_ZERO"); |
| 1157 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1158 | break; |
| 1159 | case STATUS_INTEGER_DIVIDE_BY_ZERO: |
| 1160 | DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_DIVIDE_BY_ZERO"); |
| 1161 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1162 | break; |
| 1163 | case STATUS_INTEGER_OVERFLOW: |
| 1164 | DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_OVERFLOW"); |
| 1165 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 1166 | break; |
| 1167 | case EXCEPTION_BREAKPOINT: |
| 1168 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT"); |
| 1169 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; |
| 1170 | break; |
| 1171 | case DBG_CONTROL_C: |
| 1172 | DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_C"); |
| 1173 | ourstatus->value.sig = TARGET_SIGNAL_INT; |
| 1174 | break; |
| 1175 | case DBG_CONTROL_BREAK: |
| 1176 | DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_BREAK"); |
| 1177 | ourstatus->value.sig = TARGET_SIGNAL_INT; |
| 1178 | break; |
| 1179 | case EXCEPTION_SINGLE_STEP: |
| 1180 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_SINGLE_STEP"); |
| 1181 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; |
| 1182 | break; |
| 1183 | case EXCEPTION_ILLEGAL_INSTRUCTION: |
| 1184 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ILLEGAL_INSTRUCTION"); |
| 1185 | ourstatus->value.sig = TARGET_SIGNAL_ILL; |
| 1186 | break; |
| 1187 | case EXCEPTION_PRIV_INSTRUCTION: |
| 1188 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_PRIV_INSTRUCTION"); |
| 1189 | ourstatus->value.sig = TARGET_SIGNAL_ILL; |
| 1190 | break; |
| 1191 | case EXCEPTION_NONCONTINUABLE_EXCEPTION: |
| 1192 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_NONCONTINUABLE_EXCEPTION"); |
| 1193 | ourstatus->value.sig = TARGET_SIGNAL_ILL; |
| 1194 | break; |
| 1195 | default: |
| 1196 | /* Treat unhandled first chance exceptions specially. */ |
| 1197 | if (current_event.u.Exception.dwFirstChance) |
| 1198 | return -1; |
| 1199 | printf_unfiltered ("gdb: unknown target exception 0x%08lx at 0x%08lx\n", |
| 1200 | current_event.u.Exception.ExceptionRecord.ExceptionCode, |
| 1201 | (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress); |
| 1202 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; |
| 1203 | break; |
| 1204 | } |
| 1205 | exception_count++; |
| 1206 | last_sig = ourstatus->value.sig; |
| 1207 | return 1; |
| 1208 | } |
| 1209 | |
| 1210 | /* Resume all artificially suspended threads if we are continuing |
| 1211 | execution */ |
| 1212 | static BOOL |
| 1213 | win32_continue (DWORD continue_status, int id) |
| 1214 | { |
| 1215 | int i; |
| 1216 | thread_info *th; |
| 1217 | BOOL res; |
| 1218 | |
| 1219 | DEBUG_EVENTS (("ContinueDebugEvent (cpid=%ld, ctid=%ld, %s);\n", |
| 1220 | current_event.dwProcessId, current_event.dwThreadId, |
| 1221 | continue_status == DBG_CONTINUE ? |
| 1222 | "DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED")); |
| 1223 | res = ContinueDebugEvent (current_event.dwProcessId, |
| 1224 | current_event.dwThreadId, |
| 1225 | continue_status); |
| 1226 | if (res) |
| 1227 | for (th = &thread_head; (th = th->next) != NULL;) |
| 1228 | if (((id == -1) || (id == (int) th->id)) && th->suspend_count) |
| 1229 | { |
| 1230 | |
| 1231 | for (i = 0; i < th->suspend_count; i++) |
| 1232 | (void) ResumeThread (th->h); |
| 1233 | th->suspend_count = 0; |
| 1234 | if (debug_registers_changed) |
| 1235 | { |
| 1236 | /* Only change the value of the debug registers */ |
| 1237 | th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; |
| 1238 | th->context.Dr0 = dr[0]; |
| 1239 | th->context.Dr1 = dr[1]; |
| 1240 | th->context.Dr2 = dr[2]; |
| 1241 | th->context.Dr3 = dr[3]; |
| 1242 | /* th->context.Dr6 = dr[6]; |
| 1243 | FIXME: should we set dr6 also ?? */ |
| 1244 | th->context.Dr7 = dr[7]; |
| 1245 | CHECK (SetThreadContext (th->h, &th->context)); |
| 1246 | th->context.ContextFlags = 0; |
| 1247 | } |
| 1248 | } |
| 1249 | |
| 1250 | debug_registers_changed = 0; |
| 1251 | return res; |
| 1252 | } |
| 1253 | |
| 1254 | /* Called in pathological case where Windows fails to send a |
| 1255 | CREATE_PROCESS_DEBUG_EVENT after an attach. */ |
| 1256 | static DWORD |
| 1257 | fake_create_process (void) |
| 1258 | { |
| 1259 | current_process_handle = OpenProcess (PROCESS_ALL_ACCESS, FALSE, |
| 1260 | current_event.dwProcessId); |
| 1261 | main_thread_id = current_event.dwThreadId; |
| 1262 | current_thread = win32_add_thread (main_thread_id, |
| 1263 | current_event.u.CreateThread.hThread); |
| 1264 | return main_thread_id; |
| 1265 | } |
| 1266 | |
| 1267 | static void |
| 1268 | win32_resume (ptid_t ptid, int step, enum target_signal sig) |
| 1269 | { |
| 1270 | thread_info *th; |
| 1271 | DWORD continue_status = DBG_CONTINUE; |
| 1272 | |
| 1273 | int pid = PIDGET (ptid); |
| 1274 | |
| 1275 | if (sig != TARGET_SIGNAL_0) |
| 1276 | { |
| 1277 | if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT) |
| 1278 | { |
| 1279 | DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig)); |
| 1280 | } |
| 1281 | else if (sig == last_sig) |
| 1282 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1283 | else |
| 1284 | #if 0 |
| 1285 | /* This code does not seem to work, because |
| 1286 | the kernel does probably not consider changes in the ExceptionRecord |
| 1287 | structure when passing the exception to the inferior. |
| 1288 | Note that this seems possible in the exception handler itself. */ |
| 1289 | { |
| 1290 | int i; |
| 1291 | for (i = 0; xlate[i].them != -1; i++) |
| 1292 | if (xlate[i].us == sig) |
| 1293 | { |
| 1294 | current_event.u.Exception.ExceptionRecord.ExceptionCode = |
| 1295 | xlate[i].them; |
| 1296 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1297 | break; |
| 1298 | } |
| 1299 | if (continue_status == DBG_CONTINUE) |
| 1300 | { |
| 1301 | DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig)); |
| 1302 | } |
| 1303 | } |
| 1304 | #endif |
| 1305 | DEBUG_EXCEPT(("Can only continue with recieved signal %d.\n", |
| 1306 | last_sig)); |
| 1307 | } |
| 1308 | |
| 1309 | last_sig = TARGET_SIGNAL_0; |
| 1310 | |
| 1311 | DEBUG_EXEC (("gdb: win32_resume (pid=%d, step=%d, sig=%d);\n", |
| 1312 | pid, step, sig)); |
| 1313 | |
| 1314 | /* Get context for currently selected thread */ |
| 1315 | th = thread_rec (current_event.dwThreadId, FALSE); |
| 1316 | if (th) |
| 1317 | { |
| 1318 | if (step) |
| 1319 | { |
| 1320 | /* Single step by setting t bit */ |
| 1321 | win32_fetch_inferior_registers (current_regcache, PS_REGNUM); |
| 1322 | th->context.EFlags |= FLAG_TRACE_BIT; |
| 1323 | } |
| 1324 | |
| 1325 | if (th->context.ContextFlags) |
| 1326 | { |
| 1327 | if (debug_registers_changed) |
| 1328 | { |
| 1329 | th->context.Dr0 = dr[0]; |
| 1330 | th->context.Dr1 = dr[1]; |
| 1331 | th->context.Dr2 = dr[2]; |
| 1332 | th->context.Dr3 = dr[3]; |
| 1333 | /* th->context.Dr6 = dr[6]; |
| 1334 | FIXME: should we set dr6 also ?? */ |
| 1335 | th->context.Dr7 = dr[7]; |
| 1336 | } |
| 1337 | CHECK (SetThreadContext (th->h, &th->context)); |
| 1338 | th->context.ContextFlags = 0; |
| 1339 | } |
| 1340 | } |
| 1341 | |
| 1342 | /* Allow continuing with the same signal that interrupted us. |
| 1343 | Otherwise complain. */ |
| 1344 | |
| 1345 | win32_continue (continue_status, pid); |
| 1346 | } |
| 1347 | |
| 1348 | /* Get the next event from the child. Return 1 if the event requires |
| 1349 | handling by WFI (or whatever). |
| 1350 | */ |
| 1351 | static int |
| 1352 | get_win32_debug_event (int pid, struct target_waitstatus *ourstatus) |
| 1353 | { |
| 1354 | BOOL debug_event; |
| 1355 | DWORD continue_status, event_code; |
| 1356 | thread_info *th; |
| 1357 | static thread_info dummy_thread_info; |
| 1358 | int retval = 0; |
| 1359 | ptid_t ptid = {-1}; |
| 1360 | |
| 1361 | last_sig = TARGET_SIGNAL_0; |
| 1362 | |
| 1363 | if (!(debug_event = WaitForDebugEvent (¤t_event, 1000))) |
| 1364 | goto out; |
| 1365 | |
| 1366 | event_count++; |
| 1367 | continue_status = DBG_CONTINUE; |
| 1368 | |
| 1369 | event_code = current_event.dwDebugEventCode; |
| 1370 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; |
| 1371 | th = NULL; |
| 1372 | have_saved_context = 0; |
| 1373 | |
| 1374 | switch (event_code) |
| 1375 | { |
| 1376 | case CREATE_THREAD_DEBUG_EVENT: |
| 1377 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%x code=%s)\n", |
| 1378 | (unsigned) current_event.dwProcessId, |
| 1379 | (unsigned) current_event.dwThreadId, |
| 1380 | "CREATE_THREAD_DEBUG_EVENT")); |
| 1381 | if (saw_create != 1) |
| 1382 | { |
| 1383 | if (!saw_create && attach_flag) |
| 1384 | { |
| 1385 | /* Kludge around a Windows bug where first event is a create |
| 1386 | thread event. Caused when attached process does not have |
| 1387 | a main thread. */ |
| 1388 | retval = ourstatus->value.related_pid = fake_create_process (); |
| 1389 | saw_create++; |
| 1390 | } |
| 1391 | break; |
| 1392 | } |
| 1393 | /* Record the existence of this thread */ |
| 1394 | th = win32_add_thread (current_event.dwThreadId, |
| 1395 | current_event.u.CreateThread.hThread); |
| 1396 | if (info_verbose) |
| 1397 | printf_unfiltered ("[New %s]\n", |
| 1398 | target_pid_to_str ( |
| 1399 | pid_to_ptid (current_event.dwThreadId))); |
| 1400 | retval = current_event.dwThreadId; |
| 1401 | break; |
| 1402 | |
| 1403 | case EXIT_THREAD_DEBUG_EVENT: |
| 1404 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1405 | (unsigned) current_event.dwProcessId, |
| 1406 | (unsigned) current_event.dwThreadId, |
| 1407 | "EXIT_THREAD_DEBUG_EVENT")); |
| 1408 | if (current_event.dwThreadId != main_thread_id) |
| 1409 | { |
| 1410 | win32_delete_thread (current_event.dwThreadId); |
| 1411 | th = &dummy_thread_info; |
| 1412 | } |
| 1413 | break; |
| 1414 | |
| 1415 | case CREATE_PROCESS_DEBUG_EVENT: |
| 1416 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1417 | (unsigned) current_event.dwProcessId, |
| 1418 | (unsigned) current_event.dwThreadId, |
| 1419 | "CREATE_PROCESS_DEBUG_EVENT")); |
| 1420 | CloseHandle (current_event.u.CreateProcessInfo.hFile); |
| 1421 | if (++saw_create != 1) |
| 1422 | { |
| 1423 | CloseHandle (current_event.u.CreateProcessInfo.hProcess); |
| 1424 | break; |
| 1425 | } |
| 1426 | |
| 1427 | current_process_handle = current_event.u.CreateProcessInfo.hProcess; |
| 1428 | if (main_thread_id) |
| 1429 | win32_delete_thread (main_thread_id); |
| 1430 | main_thread_id = current_event.dwThreadId; |
| 1431 | /* Add the main thread */ |
| 1432 | th = win32_add_thread (main_thread_id, |
| 1433 | current_event.u.CreateProcessInfo.hThread); |
| 1434 | retval = ourstatus->value.related_pid = current_event.dwThreadId; |
| 1435 | break; |
| 1436 | |
| 1437 | case EXIT_PROCESS_DEBUG_EVENT: |
| 1438 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1439 | (unsigned) current_event.dwProcessId, |
| 1440 | (unsigned) current_event.dwThreadId, |
| 1441 | "EXIT_PROCESS_DEBUG_EVENT")); |
| 1442 | if (saw_create != 1) |
| 1443 | break; |
| 1444 | ourstatus->kind = TARGET_WAITKIND_EXITED; |
| 1445 | ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode; |
| 1446 | CloseHandle (current_process_handle); |
| 1447 | retval = main_thread_id; |
| 1448 | break; |
| 1449 | |
| 1450 | case LOAD_DLL_DEBUG_EVENT: |
| 1451 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1452 | (unsigned) current_event.dwProcessId, |
| 1453 | (unsigned) current_event.dwThreadId, |
| 1454 | "LOAD_DLL_DEBUG_EVENT")); |
| 1455 | CloseHandle (current_event.u.LoadDll.hFile); |
| 1456 | if (saw_create != 1) |
| 1457 | break; |
| 1458 | catch_errors (handle_load_dll, NULL, (char *) "", RETURN_MASK_ALL); |
| 1459 | registers_changed (); /* mark all regs invalid */ |
| 1460 | ourstatus->kind = TARGET_WAITKIND_LOADED; |
| 1461 | ourstatus->value.integer = 0; |
| 1462 | retval = main_thread_id; |
| 1463 | re_enable_breakpoints_in_shlibs (); |
| 1464 | break; |
| 1465 | |
| 1466 | case UNLOAD_DLL_DEBUG_EVENT: |
| 1467 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1468 | (unsigned) current_event.dwProcessId, |
| 1469 | (unsigned) current_event.dwThreadId, |
| 1470 | "UNLOAD_DLL_DEBUG_EVENT")); |
| 1471 | if (saw_create != 1) |
| 1472 | break; |
| 1473 | catch_errors (handle_unload_dll, NULL, (char *) "", RETURN_MASK_ALL); |
| 1474 | registers_changed (); /* mark all regs invalid */ |
| 1475 | /* ourstatus->kind = TARGET_WAITKIND_UNLOADED; |
| 1476 | does not exist yet. */ |
| 1477 | break; |
| 1478 | |
| 1479 | case EXCEPTION_DEBUG_EVENT: |
| 1480 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1481 | (unsigned) current_event.dwProcessId, |
| 1482 | (unsigned) current_event.dwThreadId, |
| 1483 | "EXCEPTION_DEBUG_EVENT")); |
| 1484 | if (saw_create != 1) |
| 1485 | break; |
| 1486 | switch (handle_exception (ourstatus)) |
| 1487 | { |
| 1488 | case 0: |
| 1489 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1490 | break; |
| 1491 | case 1: |
| 1492 | retval = current_event.dwThreadId; |
| 1493 | break; |
| 1494 | case -1: |
| 1495 | last_sig = 1; |
| 1496 | continue_status = -1; |
| 1497 | break; |
| 1498 | } |
| 1499 | break; |
| 1500 | |
| 1501 | case OUTPUT_DEBUG_STRING_EVENT: /* message from the kernel */ |
| 1502 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1503 | (unsigned) current_event.dwProcessId, |
| 1504 | (unsigned) current_event.dwThreadId, |
| 1505 | "OUTPUT_DEBUG_STRING_EVENT")); |
| 1506 | if (saw_create != 1) |
| 1507 | break; |
| 1508 | retval = handle_output_debug_string (ourstatus); |
| 1509 | break; |
| 1510 | |
| 1511 | default: |
| 1512 | if (saw_create != 1) |
| 1513 | break; |
| 1514 | printf_unfiltered ("gdb: kernel event for pid=%ld tid=%ld\n", |
| 1515 | (DWORD) current_event.dwProcessId, |
| 1516 | (DWORD) current_event.dwThreadId); |
| 1517 | printf_unfiltered (" unknown event code %ld\n", |
| 1518 | current_event.dwDebugEventCode); |
| 1519 | break; |
| 1520 | } |
| 1521 | |
| 1522 | if (!retval || saw_create != 1) |
| 1523 | { |
| 1524 | if (continue_status == -1) |
| 1525 | win32_resume (ptid, 0, 1); |
| 1526 | else |
| 1527 | CHECK (win32_continue (continue_status, -1)); |
| 1528 | } |
| 1529 | else |
| 1530 | { |
| 1531 | inferior_ptid = pid_to_ptid (retval); |
| 1532 | current_thread = th ?: thread_rec (current_event.dwThreadId, TRUE); |
| 1533 | } |
| 1534 | |
| 1535 | out: |
| 1536 | return retval; |
| 1537 | } |
| 1538 | |
| 1539 | /* Wait for interesting events to occur in the target process. */ |
| 1540 | static ptid_t |
| 1541 | win32_wait (ptid_t ptid, struct target_waitstatus *ourstatus) |
| 1542 | { |
| 1543 | int pid = PIDGET (ptid); |
| 1544 | |
| 1545 | target_terminal_ours (); |
| 1546 | |
| 1547 | /* We loop when we get a non-standard exception rather than return |
| 1548 | with a SPURIOUS because resume can try and step or modify things, |
| 1549 | which needs a current_thread->h. But some of these exceptions mark |
| 1550 | the birth or death of threads, which mean that the current thread |
| 1551 | isn't necessarily what you think it is. */ |
| 1552 | |
| 1553 | while (1) |
| 1554 | { |
| 1555 | int retval = get_win32_debug_event (pid, ourstatus); |
| 1556 | if (retval) |
| 1557 | return pid_to_ptid (retval); |
| 1558 | else |
| 1559 | { |
| 1560 | int detach = 0; |
| 1561 | |
| 1562 | if (deprecated_ui_loop_hook != NULL) |
| 1563 | detach = deprecated_ui_loop_hook (0); |
| 1564 | |
| 1565 | if (detach) |
| 1566 | win32_kill_inferior (); |
| 1567 | } |
| 1568 | } |
| 1569 | } |
| 1570 | |
| 1571 | static void |
| 1572 | do_initial_win32_stuff (DWORD pid) |
| 1573 | { |
| 1574 | extern int stop_after_trap; |
| 1575 | int i; |
| 1576 | |
| 1577 | last_sig = TARGET_SIGNAL_0; |
| 1578 | event_count = 0; |
| 1579 | exception_count = 0; |
| 1580 | debug_registers_changed = 0; |
| 1581 | debug_registers_used = 0; |
| 1582 | for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++) |
| 1583 | dr[i] = 0; |
| 1584 | current_event.dwProcessId = pid; |
| 1585 | memset (¤t_event, 0, sizeof (current_event)); |
| 1586 | push_target (&win32_ops); |
| 1587 | disable_breakpoints_in_shlibs (1); |
| 1588 | win32_clear_solib (); |
| 1589 | clear_proceed_status (); |
| 1590 | init_wait_for_inferior (); |
| 1591 | |
| 1592 | terminal_init_inferior_with_pgrp (pid); |
| 1593 | target_terminal_inferior (); |
| 1594 | |
| 1595 | while (1) |
| 1596 | { |
| 1597 | stop_after_trap = 1; |
| 1598 | wait_for_inferior (); |
| 1599 | if (stop_signal != TARGET_SIGNAL_TRAP) |
| 1600 | resume (0, stop_signal); |
| 1601 | else |
| 1602 | break; |
| 1603 | } |
| 1604 | stop_after_trap = 0; |
| 1605 | return; |
| 1606 | } |
| 1607 | |
| 1608 | /* Since Windows XP, detaching from a process is supported by Windows. |
| 1609 | The following code tries loading the appropriate functions dynamically. |
| 1610 | If loading these functions succeeds use them to actually detach from |
| 1611 | the inferior process, otherwise behave as usual, pretending that |
| 1612 | detach has worked. */ |
| 1613 | static BOOL WINAPI (*DebugSetProcessKillOnExit)(BOOL); |
| 1614 | static BOOL WINAPI (*DebugActiveProcessStop)(DWORD); |
| 1615 | |
| 1616 | static int |
| 1617 | has_detach_ability (void) |
| 1618 | { |
| 1619 | static HMODULE kernel32 = NULL; |
| 1620 | |
| 1621 | if (!kernel32) |
| 1622 | kernel32 = LoadLibrary ("kernel32.dll"); |
| 1623 | if (kernel32) |
| 1624 | { |
| 1625 | if (!DebugSetProcessKillOnExit) |
| 1626 | DebugSetProcessKillOnExit = GetProcAddress (kernel32, |
| 1627 | "DebugSetProcessKillOnExit"); |
| 1628 | if (!DebugActiveProcessStop) |
| 1629 | DebugActiveProcessStop = GetProcAddress (kernel32, |
| 1630 | "DebugActiveProcessStop"); |
| 1631 | if (DebugSetProcessKillOnExit && DebugActiveProcessStop) |
| 1632 | return 1; |
| 1633 | } |
| 1634 | return 0; |
| 1635 | } |
| 1636 | |
| 1637 | /* Try to set or remove a user privilege to the current process. Return -1 |
| 1638 | if that fails, the previous setting of that privilege otherwise. |
| 1639 | |
| 1640 | This code is copied from the Cygwin source code and rearranged to allow |
| 1641 | dynamically loading of the needed symbols from advapi32 which is only |
| 1642 | available on NT/2K/XP. */ |
| 1643 | static int |
| 1644 | set_process_privilege (const char *privilege, BOOL enable) |
| 1645 | { |
| 1646 | static HMODULE advapi32 = NULL; |
| 1647 | static BOOL WINAPI (*OpenProcessToken)(HANDLE, DWORD, PHANDLE); |
| 1648 | static BOOL WINAPI (*LookupPrivilegeValue)(LPCSTR, LPCSTR, PLUID); |
| 1649 | static BOOL WINAPI (*AdjustTokenPrivileges)(HANDLE, BOOL, PTOKEN_PRIVILEGES, |
| 1650 | DWORD, PTOKEN_PRIVILEGES, PDWORD); |
| 1651 | |
| 1652 | HANDLE token_hdl = NULL; |
| 1653 | LUID restore_priv; |
| 1654 | TOKEN_PRIVILEGES new_priv, orig_priv; |
| 1655 | int ret = -1; |
| 1656 | DWORD size; |
| 1657 | |
| 1658 | if (GetVersion () >= 0x80000000) /* No security availbale on 9x/Me */ |
| 1659 | return 0; |
| 1660 | |
| 1661 | if (!advapi32) |
| 1662 | { |
| 1663 | if (!(advapi32 = LoadLibrary ("advapi32.dll"))) |
| 1664 | goto out; |
| 1665 | if (!OpenProcessToken) |
| 1666 | OpenProcessToken = GetProcAddress (advapi32, "OpenProcessToken"); |
| 1667 | if (!LookupPrivilegeValue) |
| 1668 | LookupPrivilegeValue = GetProcAddress (advapi32, |
| 1669 | "LookupPrivilegeValueA"); |
| 1670 | if (!AdjustTokenPrivileges) |
| 1671 | AdjustTokenPrivileges = GetProcAddress (advapi32, |
| 1672 | "AdjustTokenPrivileges"); |
| 1673 | if (!OpenProcessToken || !LookupPrivilegeValue || !AdjustTokenPrivileges) |
| 1674 | { |
| 1675 | advapi32 = NULL; |
| 1676 | goto out; |
| 1677 | } |
| 1678 | } |
| 1679 | |
| 1680 | if (!OpenProcessToken (GetCurrentProcess (), |
| 1681 | TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES, |
| 1682 | &token_hdl)) |
| 1683 | goto out; |
| 1684 | |
| 1685 | if (!LookupPrivilegeValue (NULL, privilege, &restore_priv)) |
| 1686 | goto out; |
| 1687 | |
| 1688 | new_priv.PrivilegeCount = 1; |
| 1689 | new_priv.Privileges[0].Luid = restore_priv; |
| 1690 | new_priv.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED : 0; |
| 1691 | |
| 1692 | if (!AdjustTokenPrivileges (token_hdl, FALSE, &new_priv, |
| 1693 | sizeof orig_priv, &orig_priv, &size)) |
| 1694 | goto out; |
| 1695 | #if 0 |
| 1696 | /* Disabled, otherwise every `attach' in an unprivileged user session |
| 1697 | would raise the "Failed to get SE_DEBUG_NAME privilege" warning in |
| 1698 | win32_attach(). */ |
| 1699 | /* AdjustTokenPrivileges returns TRUE even if the privilege could not |
| 1700 | be enabled. GetLastError () returns an correct error code, though. */ |
| 1701 | if (enable && GetLastError () == ERROR_NOT_ALL_ASSIGNED) |
| 1702 | goto out; |
| 1703 | #endif |
| 1704 | |
| 1705 | ret = orig_priv.Privileges[0].Attributes == SE_PRIVILEGE_ENABLED ? 1 : 0; |
| 1706 | |
| 1707 | out: |
| 1708 | if (token_hdl) |
| 1709 | CloseHandle (token_hdl); |
| 1710 | |
| 1711 | return ret; |
| 1712 | } |
| 1713 | |
| 1714 | /* Attach to process PID, then initialize for debugging it. */ |
| 1715 | static void |
| 1716 | win32_attach (char *args, int from_tty) |
| 1717 | { |
| 1718 | BOOL ok; |
| 1719 | DWORD pid; |
| 1720 | |
| 1721 | if (!args) |
| 1722 | error_no_arg (_("process-id to attach")); |
| 1723 | |
| 1724 | if (set_process_privilege (SE_DEBUG_NAME, TRUE) < 0) |
| 1725 | { |
| 1726 | printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n"); |
| 1727 | printf_unfiltered ("This can cause attach to fail on Windows NT/2K/XP\n"); |
| 1728 | } |
| 1729 | |
| 1730 | pid = strtoul (args, 0, 0); /* Windows pid */ |
| 1731 | |
| 1732 | win32_init_thread_list (); |
| 1733 | ok = DebugActiveProcess (pid); |
| 1734 | saw_create = 0; |
| 1735 | |
| 1736 | if (!ok) |
| 1737 | { |
| 1738 | /* Try fall back to Cygwin pid */ |
| 1739 | pid = cygwin_internal (CW_CYGWIN_PID_TO_WINPID, pid); |
| 1740 | |
| 1741 | if (pid > 0) |
| 1742 | ok = DebugActiveProcess (pid); |
| 1743 | |
| 1744 | if (!ok) |
| 1745 | error (_("Can't attach to process.")); |
| 1746 | } |
| 1747 | |
| 1748 | if (has_detach_ability ()) |
| 1749 | DebugSetProcessKillOnExit (FALSE); |
| 1750 | |
| 1751 | attach_flag = 1; |
| 1752 | |
| 1753 | if (from_tty) |
| 1754 | { |
| 1755 | char *exec_file = (char *) get_exec_file (0); |
| 1756 | |
| 1757 | if (exec_file) |
| 1758 | printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, |
| 1759 | target_pid_to_str (pid_to_ptid (pid))); |
| 1760 | else |
| 1761 | printf_unfiltered ("Attaching to %s\n", |
| 1762 | target_pid_to_str (pid_to_ptid (pid))); |
| 1763 | |
| 1764 | gdb_flush (gdb_stdout); |
| 1765 | } |
| 1766 | |
| 1767 | do_initial_win32_stuff (pid); |
| 1768 | target_terminal_ours (); |
| 1769 | } |
| 1770 | |
| 1771 | static void |
| 1772 | win32_detach (char *args, int from_tty) |
| 1773 | { |
| 1774 | int detached = 1; |
| 1775 | |
| 1776 | if (has_detach_ability ()) |
| 1777 | { |
| 1778 | ptid_t ptid = {-1}; |
| 1779 | win32_resume (ptid, 0, TARGET_SIGNAL_0); |
| 1780 | |
| 1781 | if (!DebugActiveProcessStop (current_event.dwProcessId)) |
| 1782 | { |
| 1783 | error (_("Can't detach process %lu (error %lu)"), |
| 1784 | current_event.dwProcessId, GetLastError ()); |
| 1785 | detached = 0; |
| 1786 | } |
| 1787 | DebugSetProcessKillOnExit (FALSE); |
| 1788 | } |
| 1789 | if (detached && from_tty) |
| 1790 | { |
| 1791 | char *exec_file = get_exec_file (0); |
| 1792 | if (exec_file == 0) |
| 1793 | exec_file = ""; |
| 1794 | printf_unfiltered ("Detaching from program: %s, Pid %lu\n", exec_file, |
| 1795 | current_event.dwProcessId); |
| 1796 | gdb_flush (gdb_stdout); |
| 1797 | } |
| 1798 | inferior_ptid = null_ptid; |
| 1799 | unpush_target (&win32_ops); |
| 1800 | } |
| 1801 | |
| 1802 | static char * |
| 1803 | win32_pid_to_exec_file (int pid) |
| 1804 | { |
| 1805 | /* Try to find the process path using the Cygwin internal process list |
| 1806 | pid isn't a valid pid, unfortunately. Use current_event.dwProcessId |
| 1807 | instead. */ |
| 1808 | /* TODO: Also find native Windows processes using CW_GETPINFO_FULL. */ |
| 1809 | |
| 1810 | static char path[MAX_PATH + 1]; |
| 1811 | char *path_ptr = NULL; |
| 1812 | int cpid; |
| 1813 | struct external_pinfo *pinfo; |
| 1814 | |
| 1815 | cygwin_internal (CW_LOCK_PINFO, 1000); |
| 1816 | for (cpid = 0; |
| 1817 | (pinfo = (struct external_pinfo *) |
| 1818 | cygwin_internal (CW_GETPINFO, cpid | CW_NEXTPID)); |
| 1819 | cpid = pinfo->pid) |
| 1820 | { |
| 1821 | if (pinfo->dwProcessId == current_event.dwProcessId) /* Got it */ |
| 1822 | { |
| 1823 | cygwin_conv_to_full_posix_path (pinfo->progname, path); |
| 1824 | path_ptr = path; |
| 1825 | break; |
| 1826 | } |
| 1827 | } |
| 1828 | cygwin_internal (CW_UNLOCK_PINFO); |
| 1829 | return path_ptr; |
| 1830 | } |
| 1831 | |
| 1832 | /* Print status information about what we're accessing. */ |
| 1833 | |
| 1834 | static void |
| 1835 | win32_files_info (struct target_ops *ignore) |
| 1836 | { |
| 1837 | printf_unfiltered ("\tUsing the running image of %s %s.\n", |
| 1838 | attach_flag ? "attached" : "child", target_pid_to_str (inferior_ptid)); |
| 1839 | } |
| 1840 | |
| 1841 | static void |
| 1842 | win32_open (char *arg, int from_tty) |
| 1843 | { |
| 1844 | error (_("Use the \"run\" command to start a Unix child process.")); |
| 1845 | } |
| 1846 | |
| 1847 | /* Start an inferior win32 child process and sets inferior_ptid to its pid. |
| 1848 | EXEC_FILE is the file to run. |
| 1849 | ALLARGS is a string containing the arguments to the program. |
| 1850 | ENV is the environment vector to pass. Errors reported with error(). */ |
| 1851 | |
| 1852 | static void |
| 1853 | win32_create_inferior (char *exec_file, char *allargs, char **in_env, |
| 1854 | int from_tty) |
| 1855 | { |
| 1856 | STARTUPINFO si; |
| 1857 | PROCESS_INFORMATION pi; |
| 1858 | BOOL ret; |
| 1859 | DWORD flags; |
| 1860 | char *args; |
| 1861 | char real_path[MAXPATHLEN]; |
| 1862 | char *toexec; |
| 1863 | char shell[MAX_PATH + 1]; /* Path to shell */ |
| 1864 | const char *sh; |
| 1865 | int tty; |
| 1866 | int ostdin, ostdout, ostderr; |
| 1867 | const char *inferior_io_terminal = get_inferior_io_terminal (); |
| 1868 | |
| 1869 | if (!exec_file) |
| 1870 | error (_("No executable specified, use `target exec'.")); |
| 1871 | |
| 1872 | memset (&si, 0, sizeof (si)); |
| 1873 | si.cb = sizeof (si); |
| 1874 | |
| 1875 | if (!useshell) |
| 1876 | { |
| 1877 | flags = DEBUG_ONLY_THIS_PROCESS; |
| 1878 | cygwin_conv_to_win32_path (exec_file, real_path); |
| 1879 | toexec = real_path; |
| 1880 | } |
| 1881 | else |
| 1882 | { |
| 1883 | char *newallargs; |
| 1884 | sh = getenv ("SHELL"); |
| 1885 | if (!sh) |
| 1886 | sh = "/bin/sh"; |
| 1887 | cygwin_conv_to_win32_path (sh, shell); |
| 1888 | newallargs = alloca (sizeof (" -c 'exec '") + strlen (exec_file) |
| 1889 | + strlen (allargs) + 2); |
| 1890 | sprintf (newallargs, " -c 'exec %s %s'", exec_file, allargs); |
| 1891 | allargs = newallargs; |
| 1892 | toexec = shell; |
| 1893 | flags = DEBUG_PROCESS; |
| 1894 | } |
| 1895 | |
| 1896 | if (new_group) |
| 1897 | flags |= CREATE_NEW_PROCESS_GROUP; |
| 1898 | |
| 1899 | if (new_console) |
| 1900 | flags |= CREATE_NEW_CONSOLE; |
| 1901 | |
| 1902 | attach_flag = 0; |
| 1903 | |
| 1904 | args = alloca (strlen (toexec) + strlen (allargs) + 2); |
| 1905 | strcpy (args, toexec); |
| 1906 | strcat (args, " "); |
| 1907 | strcat (args, allargs); |
| 1908 | |
| 1909 | /* Prepare the environment vars for CreateProcess. */ |
| 1910 | cygwin_internal (CW_SYNC_WINENV); |
| 1911 | |
| 1912 | if (!inferior_io_terminal) |
| 1913 | tty = ostdin = ostdout = ostderr = -1; |
| 1914 | else |
| 1915 | { |
| 1916 | tty = open (inferior_io_terminal, O_RDWR | O_NOCTTY); |
| 1917 | if (tty < 0) |
| 1918 | { |
| 1919 | print_sys_errmsg (inferior_io_terminal, errno); |
| 1920 | ostdin = ostdout = ostderr = -1; |
| 1921 | } |
| 1922 | else |
| 1923 | { |
| 1924 | ostdin = dup (0); |
| 1925 | ostdout = dup (1); |
| 1926 | ostderr = dup (2); |
| 1927 | dup2 (tty, 0); |
| 1928 | dup2 (tty, 1); |
| 1929 | dup2 (tty, 2); |
| 1930 | } |
| 1931 | } |
| 1932 | |
| 1933 | win32_init_thread_list (); |
| 1934 | ret = CreateProcess (0, |
| 1935 | args, /* command line */ |
| 1936 | NULL, /* Security */ |
| 1937 | NULL, /* thread */ |
| 1938 | TRUE, /* inherit handles */ |
| 1939 | flags, /* start flags */ |
| 1940 | NULL, /* environment */ |
| 1941 | NULL, /* current directory */ |
| 1942 | &si, |
| 1943 | &pi); |
| 1944 | if (tty >= 0) |
| 1945 | { |
| 1946 | close (tty); |
| 1947 | dup2 (ostdin, 0); |
| 1948 | dup2 (ostdout, 1); |
| 1949 | dup2 (ostderr, 2); |
| 1950 | close (ostdin); |
| 1951 | close (ostdout); |
| 1952 | close (ostderr); |
| 1953 | } |
| 1954 | |
| 1955 | if (!ret) |
| 1956 | error (_("Error creating process %s, (error %d)."), |
| 1957 | exec_file, (unsigned) GetLastError ()); |
| 1958 | |
| 1959 | CloseHandle (pi.hThread); |
| 1960 | CloseHandle (pi.hProcess); |
| 1961 | |
| 1962 | if (useshell && shell[0] != '\0') |
| 1963 | saw_create = -1; |
| 1964 | else |
| 1965 | saw_create = 0; |
| 1966 | |
| 1967 | do_initial_win32_stuff (pi.dwProcessId); |
| 1968 | |
| 1969 | /* win32_continue (DBG_CONTINUE, -1); */ |
| 1970 | } |
| 1971 | |
| 1972 | static void |
| 1973 | win32_mourn_inferior (void) |
| 1974 | { |
| 1975 | (void) win32_continue (DBG_CONTINUE, -1); |
| 1976 | i386_cleanup_dregs(); |
| 1977 | unpush_target (&win32_ops); |
| 1978 | generic_mourn_inferior (); |
| 1979 | } |
| 1980 | |
| 1981 | /* Send a SIGINT to the process group. This acts just like the user typed a |
| 1982 | ^C on the controlling terminal. */ |
| 1983 | |
| 1984 | static void |
| 1985 | win32_stop (void) |
| 1986 | { |
| 1987 | DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n")); |
| 1988 | CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId)); |
| 1989 | registers_changed (); /* refresh register state */ |
| 1990 | } |
| 1991 | |
| 1992 | static int |
| 1993 | win32_xfer_memory (CORE_ADDR memaddr, gdb_byte *our, int len, |
| 1994 | int write, struct mem_attrib *mem, |
| 1995 | struct target_ops *target) |
| 1996 | { |
| 1997 | DWORD done = 0; |
| 1998 | if (write) |
| 1999 | { |
| 2000 | DEBUG_MEM (("gdb: write target memory, %d bytes at 0x%08lx\n", |
| 2001 | len, (DWORD) memaddr)); |
| 2002 | if (!WriteProcessMemory (current_process_handle, (LPVOID) memaddr, our, |
| 2003 | len, &done)) |
| 2004 | done = 0; |
| 2005 | FlushInstructionCache (current_process_handle, (LPCVOID) memaddr, len); |
| 2006 | } |
| 2007 | else |
| 2008 | { |
| 2009 | DEBUG_MEM (("gdb: read target memory, %d bytes at 0x%08lx\n", |
| 2010 | len, (DWORD) memaddr)); |
| 2011 | if (!ReadProcessMemory (current_process_handle, (LPCVOID) memaddr, our, |
| 2012 | len, &done)) |
| 2013 | done = 0; |
| 2014 | } |
| 2015 | return done; |
| 2016 | } |
| 2017 | |
| 2018 | static void |
| 2019 | win32_kill_inferior (void) |
| 2020 | { |
| 2021 | CHECK (TerminateProcess (current_process_handle, 0)); |
| 2022 | |
| 2023 | for (;;) |
| 2024 | { |
| 2025 | if (!win32_continue (DBG_CONTINUE, -1)) |
| 2026 | break; |
| 2027 | if (!WaitForDebugEvent (¤t_event, INFINITE)) |
| 2028 | break; |
| 2029 | if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT) |
| 2030 | break; |
| 2031 | } |
| 2032 | |
| 2033 | CHECK (CloseHandle (current_process_handle)); |
| 2034 | |
| 2035 | /* this may fail in an attached process so don't check. */ |
| 2036 | if (current_thread && current_thread->h) |
| 2037 | (void) CloseHandle (current_thread->h); |
| 2038 | target_mourn_inferior (); /* or just win32_mourn_inferior? */ |
| 2039 | } |
| 2040 | |
| 2041 | static void |
| 2042 | win32_prepare_to_store (struct regcache *regcache) |
| 2043 | { |
| 2044 | /* Do nothing, since we can store individual regs */ |
| 2045 | } |
| 2046 | |
| 2047 | static int |
| 2048 | win32_can_run (void) |
| 2049 | { |
| 2050 | return 1; |
| 2051 | } |
| 2052 | |
| 2053 | static void |
| 2054 | win32_close (int x) |
| 2055 | { |
| 2056 | DEBUG_EVENTS (("gdb: win32_close, inferior_ptid=%d\n", |
| 2057 | PIDGET (inferior_ptid))); |
| 2058 | } |
| 2059 | |
| 2060 | /* Convert pid to printable format. */ |
| 2061 | static char * |
| 2062 | cygwin_pid_to_str (ptid_t ptid) |
| 2063 | { |
| 2064 | static char buf[80]; |
| 2065 | int pid = PIDGET (ptid); |
| 2066 | |
| 2067 | if ((DWORD) pid == current_event.dwProcessId) |
| 2068 | sprintf (buf, "process %d", pid); |
| 2069 | else |
| 2070 | sprintf (buf, "thread %ld.0x%x", current_event.dwProcessId, pid); |
| 2071 | return buf; |
| 2072 | } |
| 2073 | |
| 2074 | typedef struct |
| 2075 | { |
| 2076 | struct target_ops *target; |
| 2077 | bfd_vma addr; |
| 2078 | } map_code_section_args; |
| 2079 | |
| 2080 | static void |
| 2081 | map_single_dll_code_section (bfd *abfd, asection *sect, void *obj) |
| 2082 | { |
| 2083 | int old; |
| 2084 | int update_coreops; |
| 2085 | struct section_table *new_target_sect_ptr; |
| 2086 | |
| 2087 | map_code_section_args *args = (map_code_section_args *) obj; |
| 2088 | struct target_ops *target = args->target; |
| 2089 | if (sect->flags & SEC_CODE) |
| 2090 | { |
| 2091 | update_coreops = core_ops.to_sections == target->to_sections; |
| 2092 | |
| 2093 | if (target->to_sections) |
| 2094 | { |
| 2095 | old = target->to_sections_end - target->to_sections; |
| 2096 | target->to_sections = (struct section_table *) |
| 2097 | xrealloc ((char *) target->to_sections, |
| 2098 | (sizeof (struct section_table)) * (1 + old)); |
| 2099 | } |
| 2100 | else |
| 2101 | { |
| 2102 | old = 0; |
| 2103 | target->to_sections = (struct section_table *) |
| 2104 | xmalloc ((sizeof (struct section_table))); |
| 2105 | } |
| 2106 | target->to_sections_end = target->to_sections + (1 + old); |
| 2107 | |
| 2108 | /* Update the to_sections field in the core_ops structure |
| 2109 | if needed. */ |
| 2110 | if (update_coreops) |
| 2111 | { |
| 2112 | core_ops.to_sections = target->to_sections; |
| 2113 | core_ops.to_sections_end = target->to_sections_end; |
| 2114 | } |
| 2115 | new_target_sect_ptr = target->to_sections + old; |
| 2116 | new_target_sect_ptr->addr = args->addr + bfd_section_vma (abfd, sect); |
| 2117 | new_target_sect_ptr->endaddr = args->addr + bfd_section_vma (abfd, sect) + |
| 2118 | bfd_section_size (abfd, sect);; |
| 2119 | new_target_sect_ptr->the_bfd_section = sect; |
| 2120 | new_target_sect_ptr->bfd = abfd; |
| 2121 | } |
| 2122 | } |
| 2123 | |
| 2124 | static int |
| 2125 | dll_code_sections_add (const char *dll_name, int base_addr, struct target_ops *target) |
| 2126 | { |
| 2127 | bfd *dll_bfd; |
| 2128 | map_code_section_args map_args; |
| 2129 | asection *lowest_sect; |
| 2130 | char *name; |
| 2131 | if (dll_name == NULL || target == NULL) |
| 2132 | return 0; |
| 2133 | name = xstrdup (dll_name); |
| 2134 | dll_bfd = bfd_openr (name, "pei-i386"); |
| 2135 | if (dll_bfd == NULL) |
| 2136 | return 0; |
| 2137 | |
| 2138 | if (bfd_check_format (dll_bfd, bfd_object)) |
| 2139 | { |
| 2140 | lowest_sect = bfd_get_section_by_name (dll_bfd, ".text"); |
| 2141 | if (lowest_sect == NULL) |
| 2142 | return 0; |
| 2143 | map_args.target = target; |
| 2144 | map_args.addr = base_addr - bfd_section_vma (dll_bfd, lowest_sect); |
| 2145 | |
| 2146 | bfd_map_over_sections (dll_bfd, &map_single_dll_code_section, (void *) (&map_args)); |
| 2147 | } |
| 2148 | |
| 2149 | return 1; |
| 2150 | } |
| 2151 | |
| 2152 | static void |
| 2153 | core_section_load_dll_symbols (bfd *abfd, asection *sect, void *obj) |
| 2154 | { |
| 2155 | struct target_ops *target = (struct target_ops *) obj; |
| 2156 | |
| 2157 | DWORD base_addr; |
| 2158 | |
| 2159 | int dll_name_size; |
| 2160 | struct win32_pstatus *pstatus; |
| 2161 | struct so_list *so; |
| 2162 | char *dll_name; |
| 2163 | char *buf = NULL; |
| 2164 | char *p; |
| 2165 | struct objfile *objfile; |
| 2166 | const char *dll_basename; |
| 2167 | |
| 2168 | if (strncmp (sect->name, ".module", 7) != 0) |
| 2169 | return; |
| 2170 | |
| 2171 | buf = (char *) xmalloc (bfd_get_section_size (sect) + 1); |
| 2172 | if (!buf) |
| 2173 | { |
| 2174 | printf_unfiltered ("memory allocation failed for %s\n", sect->name); |
| 2175 | goto out; |
| 2176 | } |
| 2177 | if (!bfd_get_section_contents (abfd, sect, buf, 0, bfd_get_section_size (sect))) |
| 2178 | goto out; |
| 2179 | |
| 2180 | pstatus = (struct win32_pstatus *) buf; |
| 2181 | |
| 2182 | memmove (&base_addr, &(pstatus->data.module_info.base_address), sizeof (base_addr)); |
| 2183 | dll_name_size = pstatus->data.module_info.module_name_size; |
| 2184 | if (offsetof (struct win32_pstatus, data.module_info.module_name) + dll_name_size > bfd_get_section_size (sect)) |
| 2185 | goto out; |
| 2186 | |
| 2187 | dll_name = pstatus->data.module_info.module_name; |
| 2188 | |
| 2189 | if (!(dll_basename = strrchr (dll_name, '/'))) |
| 2190 | dll_basename = dll_name; |
| 2191 | else |
| 2192 | dll_basename++; |
| 2193 | |
| 2194 | ALL_OBJFILES (objfile) |
| 2195 | { |
| 2196 | char *objfile_basename = strrchr (objfile->name, '/'); |
| 2197 | |
| 2198 | if (objfile_basename && |
| 2199 | strcasecmp (dll_basename, objfile_basename + 1) == 0) |
| 2200 | goto out; |
| 2201 | } |
| 2202 | |
| 2203 | base_addr += 0x1000; |
| 2204 | dll_name = register_loaded_dll (dll_name, base_addr, 1); |
| 2205 | |
| 2206 | if (!dll_code_sections_add (dll_name, (DWORD) base_addr, target)) |
| 2207 | printf_unfiltered ("%s: Failed to map dll code sections.\n", dll_name); |
| 2208 | |
| 2209 | out: |
| 2210 | if (buf) |
| 2211 | xfree (buf); |
| 2212 | return; |
| 2213 | } |
| 2214 | |
| 2215 | static struct so_list * |
| 2216 | win32_current_sos (void) |
| 2217 | { |
| 2218 | struct so_list *sop; |
| 2219 | struct so_list *start = NULL; |
| 2220 | struct so_list *last = NULL; |
| 2221 | |
| 2222 | if (!solib_start.next && core_bfd) |
| 2223 | { |
| 2224 | win32_clear_solib (); |
| 2225 | bfd_map_over_sections (core_bfd, &core_section_load_dll_symbols, |
| 2226 | &win32_ops); |
| 2227 | } |
| 2228 | |
| 2229 | for (sop = solib_start.next; sop; sop = sop->next) |
| 2230 | { |
| 2231 | struct so_list *new = XZALLOC (struct so_list); |
| 2232 | strcpy (new->so_name, sop->so_name); |
| 2233 | strcpy (new->so_original_name, sop->so_original_name); |
| 2234 | if (!start) |
| 2235 | last = start = new; |
| 2236 | else |
| 2237 | { |
| 2238 | last->next = new; |
| 2239 | last = new; |
| 2240 | } |
| 2241 | } |
| 2242 | |
| 2243 | return start; |
| 2244 | } |
| 2245 | |
| 2246 | static void |
| 2247 | fetch_elf_core_registers (struct regcache *regcache, |
| 2248 | char *core_reg_sect, |
| 2249 | unsigned core_reg_size, |
| 2250 | int which, |
| 2251 | CORE_ADDR reg_addr) |
| 2252 | { |
| 2253 | int r; |
| 2254 | if (core_reg_size < sizeof (CONTEXT)) |
| 2255 | { |
| 2256 | error (_("Core file register section too small (%u bytes)."), core_reg_size); |
| 2257 | return; |
| 2258 | } |
| 2259 | for (r = 0; r < gdbarch_num_regs (current_gdbarch); r++) |
| 2260 | regcache_raw_supply (regcache, r, core_reg_sect + mappings[r]); |
| 2261 | } |
| 2262 | |
| 2263 | static int |
| 2264 | open_symbol_file_object (void *from_ttyp) |
| 2265 | { |
| 2266 | return 0; |
| 2267 | } |
| 2268 | |
| 2269 | static int |
| 2270 | in_dynsym_resolve_code (CORE_ADDR pc) |
| 2271 | { |
| 2272 | return 0; |
| 2273 | } |
| 2274 | |
| 2275 | static void |
| 2276 | init_win32_ops (void) |
| 2277 | { |
| 2278 | win32_ops.to_shortname = "child"; |
| 2279 | win32_ops.to_longname = "Win32 child process"; |
| 2280 | win32_ops.to_doc = "Win32 child process (started by the \"run\" command)."; |
| 2281 | win32_ops.to_open = win32_open; |
| 2282 | win32_ops.to_close = win32_close; |
| 2283 | win32_ops.to_attach = win32_attach; |
| 2284 | win32_ops.to_detach = win32_detach; |
| 2285 | win32_ops.to_resume = win32_resume; |
| 2286 | win32_ops.to_wait = win32_wait; |
| 2287 | win32_ops.to_fetch_registers = win32_fetch_inferior_registers; |
| 2288 | win32_ops.to_store_registers = win32_store_inferior_registers; |
| 2289 | win32_ops.to_prepare_to_store = win32_prepare_to_store; |
| 2290 | win32_ops.deprecated_xfer_memory = win32_xfer_memory; |
| 2291 | win32_ops.to_files_info = win32_files_info; |
| 2292 | win32_ops.to_insert_breakpoint = memory_insert_breakpoint; |
| 2293 | win32_ops.to_remove_breakpoint = memory_remove_breakpoint; |
| 2294 | win32_ops.to_terminal_init = terminal_init_inferior; |
| 2295 | win32_ops.to_terminal_inferior = terminal_inferior; |
| 2296 | win32_ops.to_terminal_ours_for_output = terminal_ours_for_output; |
| 2297 | win32_ops.to_terminal_ours = terminal_ours; |
| 2298 | win32_ops.to_terminal_save_ours = terminal_save_ours; |
| 2299 | win32_ops.to_terminal_info = child_terminal_info; |
| 2300 | win32_ops.to_kill = win32_kill_inferior; |
| 2301 | win32_ops.to_create_inferior = win32_create_inferior; |
| 2302 | win32_ops.to_mourn_inferior = win32_mourn_inferior; |
| 2303 | win32_ops.to_can_run = win32_can_run; |
| 2304 | win32_ops.to_thread_alive = win32_win32_thread_alive; |
| 2305 | win32_ops.to_pid_to_str = cygwin_pid_to_str; |
| 2306 | win32_ops.to_stop = win32_stop; |
| 2307 | win32_ops.to_stratum = process_stratum; |
| 2308 | win32_ops.to_has_all_memory = 1; |
| 2309 | win32_ops.to_has_memory = 1; |
| 2310 | win32_ops.to_has_stack = 1; |
| 2311 | win32_ops.to_has_registers = 1; |
| 2312 | win32_ops.to_has_execution = 1; |
| 2313 | win32_ops.to_magic = OPS_MAGIC; |
| 2314 | win32_ops.to_pid_to_exec_file = win32_pid_to_exec_file; |
| 2315 | |
| 2316 | win32_so_ops.relocate_section_addresses = win32_relocate_section_addresses; |
| 2317 | win32_so_ops.free_so = win32_free_so; |
| 2318 | win32_so_ops.clear_solib = win32_clear_solib; |
| 2319 | win32_so_ops.solib_create_inferior_hook = win32_solib_create_inferior_hook; |
| 2320 | win32_so_ops.special_symbol_handling = win32_special_symbol_handling; |
| 2321 | win32_so_ops.current_sos = win32_current_sos; |
| 2322 | win32_so_ops.open_symbol_file_object = open_symbol_file_object; |
| 2323 | win32_so_ops.in_dynsym_resolve_code = in_dynsym_resolve_code; |
| 2324 | |
| 2325 | /* FIXME: Don't do this here. *_gdbarch_init() should set so_ops. */ |
| 2326 | current_target_so_ops = &win32_so_ops; |
| 2327 | } |
| 2328 | |
| 2329 | static void |
| 2330 | set_win32_aliases (char *argv0) |
| 2331 | { |
| 2332 | add_info_alias ("dll", "sharedlibrary", 1); |
| 2333 | } |
| 2334 | |
| 2335 | void |
| 2336 | _initialize_win32_nat (void) |
| 2337 | { |
| 2338 | struct cmd_list_element *c; |
| 2339 | |
| 2340 | init_win32_ops (); |
| 2341 | |
| 2342 | c = add_com ("dll-symbols", class_files, dll_symbol_command, |
| 2343 | _("Load dll library symbols from FILE.")); |
| 2344 | set_cmd_completer (c, filename_completer); |
| 2345 | |
| 2346 | add_com_alias ("sharedlibrary", "dll-symbols", class_alias, 1); |
| 2347 | |
| 2348 | add_setshow_boolean_cmd ("shell", class_support, &useshell, _("\ |
| 2349 | Set use of shell to start subprocess."), _("\ |
| 2350 | Show use of shell to start subprocess."), NULL, |
| 2351 | NULL, |
| 2352 | NULL, /* FIXME: i18n: */ |
| 2353 | &setlist, &showlist); |
| 2354 | |
| 2355 | add_setshow_boolean_cmd ("cygwin-exceptions", class_support, &cygwin_exceptions, _("\ |
| 2356 | Break when an exception is detected in the Cygwin DLL itself."), _("\ |
| 2357 | Show whether gdb breaks on exceptions in the Cygwin DLL itself."), NULL, |
| 2358 | NULL, |
| 2359 | NULL, /* FIXME: i18n: */ |
| 2360 | &setlist, &showlist); |
| 2361 | |
| 2362 | add_setshow_boolean_cmd ("new-console", class_support, &new_console, _("\ |
| 2363 | Set creation of new console when creating child process."), _("\ |
| 2364 | Show creation of new console when creating child process."), NULL, |
| 2365 | NULL, |
| 2366 | NULL, /* FIXME: i18n: */ |
| 2367 | &setlist, &showlist); |
| 2368 | |
| 2369 | add_setshow_boolean_cmd ("new-group", class_support, &new_group, _("\ |
| 2370 | Set creation of new group when creating child process."), _("\ |
| 2371 | Show creation of new group when creating child process."), NULL, |
| 2372 | NULL, |
| 2373 | NULL, /* FIXME: i18n: */ |
| 2374 | &setlist, &showlist); |
| 2375 | |
| 2376 | add_setshow_boolean_cmd ("debugexec", class_support, &debug_exec, _("\ |
| 2377 | Set whether to display execution in child process."), _("\ |
| 2378 | Show whether to display execution in child process."), NULL, |
| 2379 | NULL, |
| 2380 | NULL, /* FIXME: i18n: */ |
| 2381 | &setlist, &showlist); |
| 2382 | |
| 2383 | add_setshow_boolean_cmd ("debugevents", class_support, &debug_events, _("\ |
| 2384 | Set whether to display kernel events in child process."), _("\ |
| 2385 | Show whether to display kernel events in child process."), NULL, |
| 2386 | NULL, |
| 2387 | NULL, /* FIXME: i18n: */ |
| 2388 | &setlist, &showlist); |
| 2389 | |
| 2390 | add_setshow_boolean_cmd ("debugmemory", class_support, &debug_memory, _("\ |
| 2391 | Set whether to display memory accesses in child process."), _("\ |
| 2392 | Show whether to display memory accesses in child process."), NULL, |
| 2393 | NULL, |
| 2394 | NULL, /* FIXME: i18n: */ |
| 2395 | &setlist, &showlist); |
| 2396 | |
| 2397 | add_setshow_boolean_cmd ("debugexceptions", class_support, |
| 2398 | &debug_exceptions, _("\ |
| 2399 | Set whether to display kernel exceptions in child process."), _("\ |
| 2400 | Show whether to display kernel exceptions in child process."), NULL, |
| 2401 | NULL, |
| 2402 | NULL, /* FIXME: i18n: */ |
| 2403 | &setlist, &showlist); |
| 2404 | |
| 2405 | add_prefix_cmd ("w32", class_info, info_w32_command, |
| 2406 | _("Print information specific to Win32 debugging."), |
| 2407 | &info_w32_cmdlist, "info w32 ", 0, &infolist); |
| 2408 | |
| 2409 | add_cmd ("selector", class_info, display_selectors, |
| 2410 | _("Display selectors infos."), |
| 2411 | &info_w32_cmdlist); |
| 2412 | add_target (&win32_ops); |
| 2413 | deprecated_init_ui_hook = set_win32_aliases; |
| 2414 | } |
| 2415 | |
| 2416 | /* Hardware watchpoint support, adapted from go32-nat.c code. */ |
| 2417 | |
| 2418 | /* Pass the address ADDR to the inferior in the I'th debug register. |
| 2419 | Here we just store the address in dr array, the registers will be |
| 2420 | actually set up when win32_continue is called. */ |
| 2421 | void |
| 2422 | cygwin_set_dr (int i, CORE_ADDR addr) |
| 2423 | { |
| 2424 | if (i < 0 || i > 3) |
| 2425 | internal_error (__FILE__, __LINE__, |
| 2426 | _("Invalid register %d in cygwin_set_dr.\n"), i); |
| 2427 | dr[i] = (unsigned) addr; |
| 2428 | debug_registers_changed = 1; |
| 2429 | debug_registers_used = 1; |
| 2430 | } |
| 2431 | |
| 2432 | /* Pass the value VAL to the inferior in the DR7 debug control |
| 2433 | register. Here we just store the address in D_REGS, the watchpoint |
| 2434 | will be actually set up in win32_wait. */ |
| 2435 | void |
| 2436 | cygwin_set_dr7 (unsigned val) |
| 2437 | { |
| 2438 | dr[7] = val; |
| 2439 | debug_registers_changed = 1; |
| 2440 | debug_registers_used = 1; |
| 2441 | } |
| 2442 | |
| 2443 | /* Get the value of the DR6 debug status register from the inferior. |
| 2444 | Here we just return the value stored in dr[6] |
| 2445 | by the last call to thread_rec for current_event.dwThreadId id. */ |
| 2446 | unsigned |
| 2447 | cygwin_get_dr6 (void) |
| 2448 | { |
| 2449 | return dr[6]; |
| 2450 | } |
| 2451 | |
| 2452 | /* Determine if the thread referenced by "pid" is alive |
| 2453 | by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0 |
| 2454 | it means that the pid has died. Otherwise it is assumed to be alive. */ |
| 2455 | static int |
| 2456 | win32_win32_thread_alive (ptid_t ptid) |
| 2457 | { |
| 2458 | int pid = PIDGET (ptid); |
| 2459 | |
| 2460 | return WaitForSingleObject (thread_rec (pid, FALSE)->h, 0) == WAIT_OBJECT_0 ? |
| 2461 | FALSE : TRUE; |
| 2462 | } |
| 2463 | |
| 2464 | static struct core_fns win32_elf_core_fns = |
| 2465 | { |
| 2466 | bfd_target_elf_flavour, |
| 2467 | default_check_format, |
| 2468 | default_core_sniffer, |
| 2469 | fetch_elf_core_registers, |
| 2470 | NULL |
| 2471 | }; |
| 2472 | |
| 2473 | void |
| 2474 | _initialize_core_win32 (void) |
| 2475 | { |
| 2476 | deprecated_add_core_fns (&win32_elf_core_fns); |
| 2477 | } |
| 2478 | |
| 2479 | void |
| 2480 | _initialize_check_for_gdb_ini (void) |
| 2481 | { |
| 2482 | char *homedir; |
| 2483 | if (inhibit_gdbinit) |
| 2484 | return; |
| 2485 | |
| 2486 | homedir = getenv ("HOME"); |
| 2487 | if (homedir) |
| 2488 | { |
| 2489 | char *p; |
| 2490 | char *oldini = (char *) alloca (strlen (homedir) + |
| 2491 | sizeof ("/gdb.ini")); |
| 2492 | strcpy (oldini, homedir); |
| 2493 | p = strchr (oldini, '\0'); |
| 2494 | if (p > oldini && p[-1] != '/') |
| 2495 | *p++ = '/'; |
| 2496 | strcpy (p, "gdb.ini"); |
| 2497 | if (access (oldini, 0) == 0) |
| 2498 | { |
| 2499 | int len = strlen (oldini); |
| 2500 | char *newini = alloca (len + 1); |
| 2501 | sprintf (newini, "%.*s.gdbinit", |
| 2502 | (int) (len - (sizeof ("gdb.ini") - 1)), oldini); |
| 2503 | warning (_("obsolete '%s' found. Rename to '%s'."), oldini, newini); |
| 2504 | } |
| 2505 | } |
| 2506 | } |