| 1 | /* Target-vector operations for controlling win32 child processes, for GDB. |
| 2 | |
| 3 | Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free |
| 4 | 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., 59 Temple Place - Suite 330, |
| 23 | Boston, MA 02111-1307, USA. */ |
| 24 | |
| 25 | /* 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 "tm.h" /* required for SSE registers */ |
| 31 | #include "frame.h" /* required by inferior.h */ |
| 32 | #include "inferior.h" |
| 33 | #include "target.h" |
| 34 | #include "gdbcore.h" |
| 35 | #include "command.h" |
| 36 | #include "completer.h" |
| 37 | #include "regcache.h" |
| 38 | #include "top.h" |
| 39 | #include "i386-tdep.h" |
| 40 | #include <signal.h> |
| 41 | #include <sys/types.h> |
| 42 | #include <fcntl.h> |
| 43 | #include <stdlib.h> |
| 44 | #include <windows.h> |
| 45 | #include <imagehlp.h> |
| 46 | #include <sys/cygwin.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 | |
| 57 | /* The ui's event loop. */ |
| 58 | extern int (*ui_loop_hook) (int signo); |
| 59 | |
| 60 | /* If we're not using the old Cygwin header file set, define the |
| 61 | following which never should have been in the generic Win32 API |
| 62 | headers in the first place since they were our own invention... */ |
| 63 | #ifndef _GNU_H_WINDOWS_H |
| 64 | enum |
| 65 | { |
| 66 | FLAG_TRACE_BIT = 0x100, |
| 67 | CONTEXT_DEBUGGER = (CONTEXT_FULL | CONTEXT_FLOATING_POINT) |
| 68 | }; |
| 69 | #endif |
| 70 | #include <sys/procfs.h> |
| 71 | #include <psapi.h> |
| 72 | |
| 73 | #ifdef HAVE_SSE_REGS |
| 74 | #define CONTEXT_DEBUGGER_DR CONTEXT_DEBUGGER | CONTEXT_DEBUG_REGISTERS \ |
| 75 | | CONTEXT_EXTENDED_REGISTERS |
| 76 | #else |
| 77 | #define CONTEXT_DEBUGGER_DR CONTEXT_DEBUGGER | CONTEXT_DEBUG_REGISTERS |
| 78 | #endif |
| 79 | |
| 80 | static unsigned dr[8]; |
| 81 | static int debug_registers_changed = 0; |
| 82 | static int debug_registers_used = 0; |
| 83 | |
| 84 | /* The string sent by cygwin when it processes a signal. |
| 85 | FIXME: This should be in a cygwin include file. */ |
| 86 | #define CYGWIN_SIGNAL_STRING "cygwin: signal" |
| 87 | |
| 88 | #define CHECK(x) check (x, __FILE__,__LINE__) |
| 89 | #define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x |
| 90 | #define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x |
| 91 | #define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x |
| 92 | #define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x |
| 93 | |
| 94 | /* Forward declaration */ |
| 95 | extern struct target_ops child_ops; |
| 96 | |
| 97 | static void child_stop (void); |
| 98 | static int win32_child_thread_alive (ptid_t); |
| 99 | void child_kill_inferior (void); |
| 100 | |
| 101 | static enum target_signal last_sig = TARGET_SIGNAL_0; |
| 102 | /* Set if a signal was received from the debugged process */ |
| 103 | |
| 104 | /* Thread information structure used to track information that is |
| 105 | not available in gdb's thread structure. */ |
| 106 | typedef struct thread_info_struct |
| 107 | { |
| 108 | struct thread_info_struct *next; |
| 109 | DWORD id; |
| 110 | HANDLE h; |
| 111 | char *name; |
| 112 | int suspend_count; |
| 113 | CONTEXT context; |
| 114 | STACKFRAME sf; |
| 115 | } |
| 116 | thread_info; |
| 117 | |
| 118 | static thread_info thread_head; |
| 119 | |
| 120 | /* The process and thread handles for the above context. */ |
| 121 | |
| 122 | static DEBUG_EVENT current_event; /* The current debug event from |
| 123 | WaitForDebugEvent */ |
| 124 | static HANDLE current_process_handle; /* Currently executing process */ |
| 125 | static thread_info *current_thread; /* Info on currently selected thread */ |
| 126 | static DWORD main_thread_id; /* Thread ID of the main thread */ |
| 127 | |
| 128 | /* Counts of things. */ |
| 129 | static int exception_count = 0; |
| 130 | static int event_count = 0; |
| 131 | |
| 132 | /* User options. */ |
| 133 | static int new_console = 0; |
| 134 | static int new_group = 1; |
| 135 | static int debug_exec = 0; /* show execution */ |
| 136 | static int debug_events = 0; /* show events from kernel */ |
| 137 | static int debug_memory = 0; /* show target memory accesses */ |
| 138 | static int debug_exceptions = 0; /* show target exceptions */ |
| 139 | |
| 140 | /* This vector maps GDB's idea of a register's number into an address |
| 141 | in the win32 exception context vector. |
| 142 | |
| 143 | It also contains the bit mask needed to load the register in question. |
| 144 | |
| 145 | One day we could read a reg, we could inspect the context we |
| 146 | already have loaded, if it doesn't have the bit set that we need, |
| 147 | we read that set of registers in using GetThreadContext. If the |
| 148 | context already contains what we need, we just unpack it. Then to |
| 149 | write a register, first we have to ensure that the context contains |
| 150 | the other regs of the group, and then we copy the info in and set |
| 151 | out bit. */ |
| 152 | |
| 153 | #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x)) |
| 154 | static const int mappings[] = |
| 155 | { |
| 156 | context_offset (Eax), |
| 157 | context_offset (Ecx), |
| 158 | context_offset (Edx), |
| 159 | context_offset (Ebx), |
| 160 | context_offset (Esp), |
| 161 | context_offset (Ebp), |
| 162 | context_offset (Esi), |
| 163 | context_offset (Edi), |
| 164 | context_offset (Eip), |
| 165 | context_offset (EFlags), |
| 166 | context_offset (SegCs), |
| 167 | context_offset (SegSs), |
| 168 | context_offset (SegDs), |
| 169 | context_offset (SegEs), |
| 170 | context_offset (SegFs), |
| 171 | context_offset (SegGs), |
| 172 | context_offset (FloatSave.RegisterArea[0 * 10]), |
| 173 | context_offset (FloatSave.RegisterArea[1 * 10]), |
| 174 | context_offset (FloatSave.RegisterArea[2 * 10]), |
| 175 | context_offset (FloatSave.RegisterArea[3 * 10]), |
| 176 | context_offset (FloatSave.RegisterArea[4 * 10]), |
| 177 | context_offset (FloatSave.RegisterArea[5 * 10]), |
| 178 | context_offset (FloatSave.RegisterArea[6 * 10]), |
| 179 | context_offset (FloatSave.RegisterArea[7 * 10]), |
| 180 | context_offset (FloatSave.ControlWord), |
| 181 | context_offset (FloatSave.StatusWord), |
| 182 | context_offset (FloatSave.TagWord), |
| 183 | context_offset (FloatSave.ErrorSelector), |
| 184 | context_offset (FloatSave.ErrorOffset), |
| 185 | context_offset (FloatSave.DataSelector), |
| 186 | context_offset (FloatSave.DataOffset), |
| 187 | context_offset (FloatSave.ErrorSelector) |
| 188 | #ifdef HAVE_SSE_REGS |
| 189 | /* XMM0-7 */ , |
| 190 | context_offset (ExtendedRegisters[10*16]), |
| 191 | context_offset (ExtendedRegisters[11*16]), |
| 192 | context_offset (ExtendedRegisters[12*16]), |
| 193 | context_offset (ExtendedRegisters[13*16]), |
| 194 | context_offset (ExtendedRegisters[14*16]), |
| 195 | context_offset (ExtendedRegisters[15*16]), |
| 196 | context_offset (ExtendedRegisters[16*16]), |
| 197 | context_offset (ExtendedRegisters[17*16]), |
| 198 | /* MXCSR */ |
| 199 | context_offset (ExtendedRegisters[24]) |
| 200 | #endif |
| 201 | }; |
| 202 | |
| 203 | #undef context_offset |
| 204 | |
| 205 | /* This vector maps the target's idea of an exception (extracted |
| 206 | from the DEBUG_EVENT structure) to GDB's idea. */ |
| 207 | |
| 208 | struct xlate_exception |
| 209 | { |
| 210 | int them; |
| 211 | enum target_signal us; |
| 212 | }; |
| 213 | |
| 214 | static const struct xlate_exception |
| 215 | xlate[] = |
| 216 | { |
| 217 | {EXCEPTION_ACCESS_VIOLATION, TARGET_SIGNAL_SEGV}, |
| 218 | {STATUS_STACK_OVERFLOW, TARGET_SIGNAL_SEGV}, |
| 219 | {EXCEPTION_BREAKPOINT, TARGET_SIGNAL_TRAP}, |
| 220 | {DBG_CONTROL_C, TARGET_SIGNAL_INT}, |
| 221 | {EXCEPTION_SINGLE_STEP, TARGET_SIGNAL_TRAP}, |
| 222 | {STATUS_FLOAT_DIVIDE_BY_ZERO, TARGET_SIGNAL_FPE}, |
| 223 | {-1, -1}}; |
| 224 | |
| 225 | static void |
| 226 | check (BOOL ok, const char *file, int line) |
| 227 | { |
| 228 | if (!ok) |
| 229 | printf_filtered ("error return %s:%d was %lu\n", file, line, |
| 230 | GetLastError ()); |
| 231 | } |
| 232 | |
| 233 | |
| 234 | /* Find a thread record given a thread id. |
| 235 | If get_context then also retrieve the context for this |
| 236 | thread. */ |
| 237 | static thread_info * |
| 238 | thread_rec (DWORD id, int get_context) |
| 239 | { |
| 240 | thread_info *th; |
| 241 | |
| 242 | for (th = &thread_head; (th = th->next) != NULL;) |
| 243 | if (th->id == id) |
| 244 | { |
| 245 | if (!th->suspend_count && get_context) |
| 246 | { |
| 247 | if (get_context > 0 && id != current_event.dwThreadId) |
| 248 | th->suspend_count = SuspendThread (th->h) + 1; |
| 249 | else if (get_context < 0) |
| 250 | th->suspend_count = -1; |
| 251 | |
| 252 | th->context.ContextFlags = CONTEXT_DEBUGGER_DR; |
| 253 | GetThreadContext (th->h, &th->context); |
| 254 | if (id == current_event.dwThreadId) |
| 255 | { |
| 256 | /* Copy dr values from that thread. */ |
| 257 | dr[0] = th->context.Dr0; |
| 258 | dr[1] = th->context.Dr1; |
| 259 | dr[2] = th->context.Dr2; |
| 260 | dr[3] = th->context.Dr3; |
| 261 | dr[6] = th->context.Dr6; |
| 262 | dr[7] = th->context.Dr7; |
| 263 | } |
| 264 | } |
| 265 | return th; |
| 266 | } |
| 267 | |
| 268 | return NULL; |
| 269 | } |
| 270 | |
| 271 | /* Add a thread to the thread list */ |
| 272 | static thread_info * |
| 273 | child_add_thread (DWORD id, HANDLE h) |
| 274 | { |
| 275 | thread_info *th; |
| 276 | |
| 277 | if ((th = thread_rec (id, FALSE))) |
| 278 | return th; |
| 279 | |
| 280 | th = (thread_info *) xmalloc (sizeof (*th)); |
| 281 | memset (th, 0, sizeof (*th)); |
| 282 | th->id = id; |
| 283 | th->h = h; |
| 284 | th->next = thread_head.next; |
| 285 | thread_head.next = th; |
| 286 | add_thread (pid_to_ptid (id)); |
| 287 | /* Set the debug registers for the new thread in they are used. */ |
| 288 | if (debug_registers_used) |
| 289 | { |
| 290 | /* Only change the value of the debug registers. */ |
| 291 | th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; |
| 292 | CHECK (GetThreadContext (th->h, &th->context)); |
| 293 | th->context.Dr0 = dr[0]; |
| 294 | th->context.Dr1 = dr[1]; |
| 295 | th->context.Dr2 = dr[2]; |
| 296 | th->context.Dr3 = dr[3]; |
| 297 | /* th->context.Dr6 = dr[6]; |
| 298 | FIXME: should we set dr6 also ?? */ |
| 299 | th->context.Dr7 = dr[7]; |
| 300 | CHECK (SetThreadContext (th->h, &th->context)); |
| 301 | th->context.ContextFlags = 0; |
| 302 | } |
| 303 | return th; |
| 304 | } |
| 305 | |
| 306 | /* Clear out any old thread list and reintialize it to a |
| 307 | pristine state. */ |
| 308 | static void |
| 309 | child_init_thread_list (void) |
| 310 | { |
| 311 | thread_info *th = &thread_head; |
| 312 | |
| 313 | DEBUG_EVENTS (("gdb: child_init_thread_list\n")); |
| 314 | init_thread_list (); |
| 315 | while (th->next != NULL) |
| 316 | { |
| 317 | thread_info *here = th->next; |
| 318 | th->next = here->next; |
| 319 | (void) CloseHandle (here->h); |
| 320 | xfree (here); |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | /* Delete a thread from the list of threads */ |
| 325 | static void |
| 326 | child_delete_thread (DWORD id) |
| 327 | { |
| 328 | thread_info *th; |
| 329 | |
| 330 | if (info_verbose) |
| 331 | printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (pid_to_ptid (id))); |
| 332 | delete_thread (pid_to_ptid (id)); |
| 333 | |
| 334 | for (th = &thread_head; |
| 335 | th->next != NULL && th->next->id != id; |
| 336 | th = th->next) |
| 337 | continue; |
| 338 | |
| 339 | if (th->next != NULL) |
| 340 | { |
| 341 | thread_info *here = th->next; |
| 342 | th->next = here->next; |
| 343 | CloseHandle (here->h); |
| 344 | xfree (here); |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | static void |
| 349 | do_child_fetch_inferior_registers (int r) |
| 350 | { |
| 351 | char *context_offset = ((char *) ¤t_thread->context) + mappings[r]; |
| 352 | long l; |
| 353 | if (r == FCS_REGNUM) |
| 354 | { |
| 355 | l = *((long *) context_offset) & 0xffff; |
| 356 | supply_register (r, (char *) &l); |
| 357 | } |
| 358 | else if (r == FOP_REGNUM) |
| 359 | { |
| 360 | l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1); |
| 361 | supply_register (r, (char *) &l); |
| 362 | } |
| 363 | else if (r >= 0) |
| 364 | supply_register (r, context_offset); |
| 365 | else |
| 366 | { |
| 367 | for (r = 0; r < NUM_REGS; r++) |
| 368 | do_child_fetch_inferior_registers (r); |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | static void |
| 373 | child_fetch_inferior_registers (int r) |
| 374 | { |
| 375 | current_thread = thread_rec (PIDGET (inferior_ptid), TRUE); |
| 376 | do_child_fetch_inferior_registers (r); |
| 377 | } |
| 378 | |
| 379 | static void |
| 380 | do_child_store_inferior_registers (int r) |
| 381 | { |
| 382 | if (r >= 0) |
| 383 | read_register_gen (r, ((char *) ¤t_thread->context) + mappings[r]); |
| 384 | else |
| 385 | { |
| 386 | for (r = 0; r < NUM_REGS; r++) |
| 387 | do_child_store_inferior_registers (r); |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | /* Store a new register value into the current thread context */ |
| 392 | static void |
| 393 | child_store_inferior_registers (int r) |
| 394 | { |
| 395 | current_thread = thread_rec (PIDGET (inferior_ptid), TRUE); |
| 396 | do_child_store_inferior_registers (r); |
| 397 | } |
| 398 | |
| 399 | static int psapi_loaded = 0; |
| 400 | static HMODULE psapi_module_handle = NULL; |
| 401 | static BOOL WINAPI (*psapi_EnumProcessModules) (HANDLE, HMODULE *, DWORD, LPDWORD) = NULL; |
| 402 | static BOOL WINAPI (*psapi_GetModuleInformation) (HANDLE, HMODULE, LPMODULEINFO, DWORD) = NULL; |
| 403 | static DWORD WINAPI (*psapi_GetModuleFileNameExA) (HANDLE, HMODULE, LPSTR, DWORD) = NULL; |
| 404 | |
| 405 | int |
| 406 | psapi_get_dll_name (DWORD BaseAddress, char *dll_name_ret) |
| 407 | { |
| 408 | DWORD len; |
| 409 | MODULEINFO mi; |
| 410 | int i; |
| 411 | HMODULE dh_buf[1]; |
| 412 | HMODULE *DllHandle = dh_buf; |
| 413 | DWORD cbNeeded; |
| 414 | BOOL ok; |
| 415 | |
| 416 | if (!psapi_loaded || |
| 417 | psapi_EnumProcessModules == NULL || |
| 418 | psapi_GetModuleInformation == NULL || |
| 419 | psapi_GetModuleFileNameExA == NULL) |
| 420 | { |
| 421 | if (psapi_loaded) |
| 422 | goto failed; |
| 423 | psapi_loaded = 1; |
| 424 | psapi_module_handle = LoadLibrary ("psapi.dll"); |
| 425 | if (!psapi_module_handle) |
| 426 | { |
| 427 | /* printf_unfiltered ("error loading psapi.dll: %u", GetLastError ()); */ |
| 428 | goto failed; |
| 429 | } |
| 430 | psapi_EnumProcessModules = GetProcAddress (psapi_module_handle, "EnumProcessModules"); |
| 431 | psapi_GetModuleInformation = GetProcAddress (psapi_module_handle, "GetModuleInformation"); |
| 432 | psapi_GetModuleFileNameExA = (void *) GetProcAddress (psapi_module_handle, |
| 433 | "GetModuleFileNameExA"); |
| 434 | if (psapi_EnumProcessModules == NULL || |
| 435 | psapi_GetModuleInformation == NULL || |
| 436 | psapi_GetModuleFileNameExA == NULL) |
| 437 | goto failed; |
| 438 | } |
| 439 | |
| 440 | cbNeeded = 0; |
| 441 | ok = (*psapi_EnumProcessModules) (current_process_handle, |
| 442 | DllHandle, |
| 443 | sizeof (HMODULE), |
| 444 | &cbNeeded); |
| 445 | |
| 446 | if (!ok || !cbNeeded) |
| 447 | goto failed; |
| 448 | |
| 449 | DllHandle = (HMODULE *) alloca (cbNeeded); |
| 450 | if (!DllHandle) |
| 451 | goto failed; |
| 452 | |
| 453 | ok = (*psapi_EnumProcessModules) (current_process_handle, |
| 454 | DllHandle, |
| 455 | cbNeeded, |
| 456 | &cbNeeded); |
| 457 | if (!ok) |
| 458 | goto failed; |
| 459 | |
| 460 | for (i = 0; i < (int) (cbNeeded / sizeof (HMODULE)); i++) |
| 461 | { |
| 462 | if (!(*psapi_GetModuleInformation) (current_process_handle, |
| 463 | DllHandle[i], |
| 464 | &mi, |
| 465 | sizeof (mi))) |
| 466 | error ("Can't get module info"); |
| 467 | |
| 468 | len = (*psapi_GetModuleFileNameExA) (current_process_handle, |
| 469 | DllHandle[i], |
| 470 | dll_name_ret, |
| 471 | MAX_PATH); |
| 472 | if (len == 0) |
| 473 | error ("Error getting dll name: %u\n", GetLastError ()); |
| 474 | |
| 475 | if ((DWORD) (mi.lpBaseOfDll) == BaseAddress) |
| 476 | return 1; |
| 477 | } |
| 478 | |
| 479 | failed: |
| 480 | dll_name_ret[0] = '\0'; |
| 481 | return 0; |
| 482 | } |
| 483 | |
| 484 | /* Encapsulate the information required in a call to |
| 485 | symbol_file_add_args */ |
| 486 | struct safe_symbol_file_add_args |
| 487 | { |
| 488 | char *name; |
| 489 | int from_tty; |
| 490 | struct section_addr_info *addrs; |
| 491 | int mainline; |
| 492 | int flags; |
| 493 | struct ui_file *err, *out; |
| 494 | struct objfile *ret; |
| 495 | }; |
| 496 | |
| 497 | /* Maintain a linked list of "so" information. */ |
| 498 | struct so_stuff |
| 499 | { |
| 500 | struct so_stuff *next; |
| 501 | DWORD load_addr; |
| 502 | int loaded; |
| 503 | struct objfile *objfile; |
| 504 | char name[1]; |
| 505 | } solib_start, *solib_end; |
| 506 | |
| 507 | /* Call symbol_file_add with stderr redirected. We don't care if there |
| 508 | are errors. */ |
| 509 | static int |
| 510 | safe_symbol_file_add_stub (void *argv) |
| 511 | { |
| 512 | #define p ((struct safe_symbol_file_add_args *)argv) |
| 513 | struct so_stuff *so = &solib_start; |
| 514 | |
| 515 | while ((so = so->next)) |
| 516 | if (so->loaded && strcasecmp (so->name, p->name) == 0) |
| 517 | return 0; |
| 518 | p->ret = symbol_file_add (p->name, p->from_tty, p->addrs, p->mainline, p->flags); |
| 519 | return !!p->ret; |
| 520 | #undef p |
| 521 | } |
| 522 | |
| 523 | /* Restore gdb's stderr after calling symbol_file_add */ |
| 524 | static void |
| 525 | safe_symbol_file_add_cleanup (void *p) |
| 526 | { |
| 527 | #define sp ((struct safe_symbol_file_add_args *)p) |
| 528 | gdb_flush (gdb_stderr); |
| 529 | gdb_flush (gdb_stdout); |
| 530 | ui_file_delete (gdb_stderr); |
| 531 | ui_file_delete (gdb_stdout); |
| 532 | gdb_stderr = sp->err; |
| 533 | gdb_stdout = sp->out; |
| 534 | #undef sp |
| 535 | } |
| 536 | |
| 537 | /* symbol_file_add wrapper that prevents errors from being displayed. */ |
| 538 | static struct objfile * |
| 539 | safe_symbol_file_add (char *name, int from_tty, |
| 540 | struct section_addr_info *addrs, |
| 541 | int mainline, int flags) |
| 542 | { |
| 543 | struct safe_symbol_file_add_args p; |
| 544 | struct cleanup *cleanup; |
| 545 | |
| 546 | cleanup = make_cleanup (safe_symbol_file_add_cleanup, &p); |
| 547 | |
| 548 | p.err = gdb_stderr; |
| 549 | p.out = gdb_stdout; |
| 550 | gdb_flush (gdb_stderr); |
| 551 | gdb_flush (gdb_stdout); |
| 552 | gdb_stderr = ui_file_new (); |
| 553 | gdb_stdout = ui_file_new (); |
| 554 | p.name = name; |
| 555 | p.from_tty = from_tty; |
| 556 | p.addrs = addrs; |
| 557 | p.mainline = mainline; |
| 558 | p.flags = flags; |
| 559 | catch_errors (safe_symbol_file_add_stub, &p, "", RETURN_MASK_ERROR); |
| 560 | |
| 561 | do_cleanups (cleanup); |
| 562 | return p.ret; |
| 563 | } |
| 564 | |
| 565 | /* Remember the maximum DLL length for printing in info dll command. */ |
| 566 | int max_dll_name_len; |
| 567 | |
| 568 | static void |
| 569 | register_loaded_dll (const char *name, DWORD load_addr) |
| 570 | { |
| 571 | struct so_stuff *so; |
| 572 | char ppath[MAX_PATH + 1]; |
| 573 | char buf[MAX_PATH + 1]; |
| 574 | char cwd[MAX_PATH + 1]; |
| 575 | char *p; |
| 576 | WIN32_FIND_DATA w32_fd; |
| 577 | HANDLE h = FindFirstFile(name, &w32_fd); |
| 578 | size_t len; |
| 579 | |
| 580 | FindClose (h); |
| 581 | strcpy (buf, name); |
| 582 | if (GetCurrentDirectory (MAX_PATH + 1, cwd)) |
| 583 | { |
| 584 | p = strrchr (buf, '\\'); |
| 585 | if (p) |
| 586 | p[1] = '\0'; |
| 587 | SetCurrentDirectory (buf); |
| 588 | GetFullPathName (w32_fd.cFileName, MAX_PATH, buf, &p); |
| 589 | SetCurrentDirectory (cwd); |
| 590 | } |
| 591 | |
| 592 | cygwin_conv_to_posix_path (buf, ppath); |
| 593 | so = (struct so_stuff *) xmalloc (sizeof (struct so_stuff) + strlen (ppath) + 8 + 1); |
| 594 | so->loaded = 0; |
| 595 | so->load_addr = load_addr; |
| 596 | so->next = NULL; |
| 597 | so->objfile = NULL; |
| 598 | strcpy (so->name, ppath); |
| 599 | |
| 600 | solib_end->next = so; |
| 601 | solib_end = so; |
| 602 | len = strlen (ppath); |
| 603 | if (len > max_dll_name_len) |
| 604 | max_dll_name_len = len; |
| 605 | } |
| 606 | |
| 607 | /* Wait for child to do something. Return pid of child, or -1 in case |
| 608 | of error; store status through argument pointer OURSTATUS. */ |
| 609 | static int |
| 610 | handle_load_dll (void *dummy) |
| 611 | { |
| 612 | LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll; |
| 613 | DWORD dll_name_ptr; |
| 614 | DWORD done; |
| 615 | char dll_buf[MAX_PATH + 1]; |
| 616 | char *dll_name = NULL; |
| 617 | char *p; |
| 618 | |
| 619 | dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0'; |
| 620 | |
| 621 | if (!psapi_get_dll_name ((DWORD) (event->lpBaseOfDll), dll_buf)) |
| 622 | dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0'; |
| 623 | |
| 624 | dll_name = dll_buf; |
| 625 | |
| 626 | /* Attempt to read the name of the dll that was detected. |
| 627 | This is documented to work only when actively debugging |
| 628 | a program. It will not work for attached processes. */ |
| 629 | if (dll_name == NULL || *dll_name == '\0') |
| 630 | { |
| 631 | DWORD size = event->fUnicode ? sizeof (WCHAR) : sizeof (char); |
| 632 | int len = 0; |
| 633 | char b[2]; |
| 634 | |
| 635 | ReadProcessMemory (current_process_handle, |
| 636 | (LPCVOID) event->lpImageName, |
| 637 | (char *) &dll_name_ptr, |
| 638 | sizeof (dll_name_ptr), &done); |
| 639 | |
| 640 | /* See if we could read the address of a string, and that the |
| 641 | address isn't null. */ |
| 642 | |
| 643 | if (done != sizeof (dll_name_ptr) || !dll_name_ptr) |
| 644 | return 1; |
| 645 | |
| 646 | do |
| 647 | { |
| 648 | ReadProcessMemory (current_process_handle, |
| 649 | (LPCVOID) (dll_name_ptr + len * size), |
| 650 | &b, |
| 651 | size, |
| 652 | &done); |
| 653 | len++; |
| 654 | } |
| 655 | while ((b[0] != 0 || b[size - 1] != 0) && done == size); |
| 656 | |
| 657 | dll_name = alloca (len); |
| 658 | |
| 659 | if (event->fUnicode) |
| 660 | { |
| 661 | WCHAR *unicode_dll_name = (WCHAR *) alloca (len * sizeof (WCHAR)); |
| 662 | ReadProcessMemory (current_process_handle, |
| 663 | (LPCVOID) dll_name_ptr, |
| 664 | unicode_dll_name, |
| 665 | len * sizeof (WCHAR), |
| 666 | &done); |
| 667 | |
| 668 | WideCharToMultiByte (CP_ACP, 0, |
| 669 | unicode_dll_name, len, |
| 670 | dll_name, len, 0, 0); |
| 671 | } |
| 672 | else |
| 673 | { |
| 674 | ReadProcessMemory (current_process_handle, |
| 675 | (LPCVOID) dll_name_ptr, |
| 676 | dll_name, |
| 677 | len, |
| 678 | &done); |
| 679 | } |
| 680 | } |
| 681 | |
| 682 | if (!dll_name) |
| 683 | return 1; |
| 684 | |
| 685 | register_loaded_dll (dll_name, (DWORD) event->lpBaseOfDll + 0x1000); |
| 686 | |
| 687 | return 1; |
| 688 | } |
| 689 | |
| 690 | static int |
| 691 | handle_unload_dll (void *dummy) |
| 692 | { |
| 693 | DWORD lpBaseOfDll = (DWORD) current_event.u.UnloadDll.lpBaseOfDll + 0x1000; |
| 694 | struct so_stuff *so; |
| 695 | |
| 696 | for (so = &solib_start; so->next != NULL; so = so->next) |
| 697 | if (so->next->load_addr == lpBaseOfDll) |
| 698 | { |
| 699 | struct so_stuff *sodel = so->next; |
| 700 | so->next = sodel->next; |
| 701 | if (!so->next) |
| 702 | solib_end = so; |
| 703 | if (sodel->objfile) |
| 704 | free_objfile (sodel->objfile); |
| 705 | xfree(sodel); |
| 706 | return 1; |
| 707 | } |
| 708 | error ("Error: dll starting at 0x%lx not found.\n", (DWORD) lpBaseOfDll); |
| 709 | |
| 710 | return 0; |
| 711 | } |
| 712 | |
| 713 | /* Return name of last loaded DLL. */ |
| 714 | char * |
| 715 | child_solib_loaded_library_pathname (int pid) |
| 716 | { |
| 717 | return !solib_end || !solib_end->name[0] ? NULL : solib_end->name; |
| 718 | } |
| 719 | |
| 720 | /* Clear list of loaded DLLs. */ |
| 721 | void |
| 722 | child_clear_solibs (void) |
| 723 | { |
| 724 | struct so_stuff *so, *so1 = solib_start.next; |
| 725 | |
| 726 | while ((so = so1) != NULL) |
| 727 | { |
| 728 | so1 = so->next; |
| 729 | xfree (so); |
| 730 | } |
| 731 | |
| 732 | solib_start.next = NULL; |
| 733 | solib_start.objfile = NULL; |
| 734 | solib_end = &solib_start; |
| 735 | max_dll_name_len = sizeof ("DLL Name") - 1; |
| 736 | } |
| 737 | |
| 738 | /* Add DLL symbol information. */ |
| 739 | static struct objfile * |
| 740 | solib_symbols_add (char *name, int from_tty, CORE_ADDR load_addr) |
| 741 | { |
| 742 | struct section_addr_info section_addrs; |
| 743 | |
| 744 | /* The symbols in a dll are offset by 0x1000, which is the |
| 745 | the offset from 0 of the first byte in an image - because |
| 746 | of the file header and the section alignment. */ |
| 747 | |
| 748 | if (!name || !name[0]) |
| 749 | return NULL; |
| 750 | |
| 751 | memset (§ion_addrs, 0, sizeof (section_addrs)); |
| 752 | section_addrs.other[0].name = ".text"; |
| 753 | section_addrs.other[0].addr = load_addr; |
| 754 | return safe_symbol_file_add (name, from_tty, NULL, 0, OBJF_SHARED); |
| 755 | } |
| 756 | |
| 757 | /* Load DLL symbol info. */ |
| 758 | void |
| 759 | dll_symbol_command (char *args, int from_tty) |
| 760 | { |
| 761 | int n; |
| 762 | dont_repeat (); |
| 763 | |
| 764 | if (args == NULL) |
| 765 | error ("dll-symbols requires a file name"); |
| 766 | |
| 767 | n = strlen (args); |
| 768 | if (n > 4 && strcasecmp (args + n - 4, ".dll") != 0) |
| 769 | { |
| 770 | char *newargs = (char *) alloca (n + 4 + 1); |
| 771 | strcpy (newargs, args); |
| 772 | strcat (newargs, ".dll"); |
| 773 | args = newargs; |
| 774 | } |
| 775 | |
| 776 | safe_symbol_file_add (args, from_tty, NULL, 0, OBJF_SHARED | OBJF_USERLOADED); |
| 777 | } |
| 778 | |
| 779 | /* List currently loaded DLLs. */ |
| 780 | void |
| 781 | info_dll_command (char *ignore, int from_tty) |
| 782 | { |
| 783 | struct so_stuff *so = &solib_start; |
| 784 | |
| 785 | if (!so->next) |
| 786 | return; |
| 787 | |
| 788 | printf_filtered ("%*s Load Address\n", -max_dll_name_len, "DLL Name"); |
| 789 | while ((so = so->next) != NULL) |
| 790 | printf_filtered ("%*s %08lx\n", -max_dll_name_len, so->name, so->load_addr); |
| 791 | |
| 792 | return; |
| 793 | } |
| 794 | |
| 795 | /* Handle DEBUG_STRING output from child process. |
| 796 | Cygwin prepends its messages with a "cygwin:". Interpret this as |
| 797 | a Cygwin signal. Otherwise just print the string as a warning. */ |
| 798 | static int |
| 799 | handle_output_debug_string (struct target_waitstatus *ourstatus) |
| 800 | { |
| 801 | char *s; |
| 802 | int gotasig = FALSE; |
| 803 | |
| 804 | if (!target_read_string |
| 805 | ((CORE_ADDR) current_event.u.DebugString.lpDebugStringData, &s, 1024, 0) |
| 806 | || !s || !*s) |
| 807 | return gotasig; |
| 808 | |
| 809 | if (strncmp (s, CYGWIN_SIGNAL_STRING, sizeof (CYGWIN_SIGNAL_STRING) - 1) != 0) |
| 810 | { |
| 811 | if (strncmp (s, "cYg", 3) != 0) |
| 812 | warning ("%s", s); |
| 813 | } |
| 814 | else |
| 815 | { |
| 816 | char *p; |
| 817 | int sig = strtol (s + sizeof (CYGWIN_SIGNAL_STRING) - 1, &p, 0); |
| 818 | gotasig = target_signal_from_host (sig); |
| 819 | ourstatus->value.sig = gotasig; |
| 820 | if (gotasig) |
| 821 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 822 | } |
| 823 | |
| 824 | xfree (s); |
| 825 | return gotasig; |
| 826 | } |
| 827 | |
| 828 | #define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \ |
| 829 | printf_unfiltered ("gdb: Target exception %s at 0x%08lx\n", x, \ |
| 830 | (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress) |
| 831 | |
| 832 | static int |
| 833 | handle_exception (struct target_waitstatus *ourstatus) |
| 834 | { |
| 835 | thread_info *th; |
| 836 | DWORD code = current_event.u.Exception.ExceptionRecord.ExceptionCode; |
| 837 | |
| 838 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 839 | |
| 840 | /* Record the context of the current thread */ |
| 841 | th = thread_rec (current_event.dwThreadId, -1); |
| 842 | |
| 843 | switch (code) |
| 844 | { |
| 845 | case EXCEPTION_ACCESS_VIOLATION: |
| 846 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ACCESS_VIOLATION"); |
| 847 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; |
| 848 | break; |
| 849 | case STATUS_STACK_OVERFLOW: |
| 850 | DEBUG_EXCEPTION_SIMPLE ("STATUS_STACK_OVERFLOW"); |
| 851 | ourstatus->value.sig = TARGET_SIGNAL_SEGV; |
| 852 | break; |
| 853 | case STATUS_FLOAT_DENORMAL_OPERAND: |
| 854 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DENORMAL_OPERAND"); |
| 855 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 856 | break; |
| 857 | case EXCEPTION_ARRAY_BOUNDS_EXCEEDED: |
| 858 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ARRAY_BOUNDS_EXCEEDED"); |
| 859 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 860 | break; |
| 861 | case STATUS_FLOAT_INEXACT_RESULT: |
| 862 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INEXACT_RESULT"); |
| 863 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 864 | break; |
| 865 | case STATUS_FLOAT_INVALID_OPERATION: |
| 866 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INVALID_OPERATION"); |
| 867 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 868 | break; |
| 869 | case STATUS_FLOAT_OVERFLOW: |
| 870 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_OVERFLOW"); |
| 871 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 872 | break; |
| 873 | case STATUS_FLOAT_STACK_CHECK: |
| 874 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_STACK_CHECK"); |
| 875 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 876 | break; |
| 877 | case STATUS_FLOAT_UNDERFLOW: |
| 878 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_UNDERFLOW"); |
| 879 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 880 | break; |
| 881 | case STATUS_FLOAT_DIVIDE_BY_ZERO: |
| 882 | DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DIVIDE_BY_ZERO"); |
| 883 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 884 | break; |
| 885 | case STATUS_INTEGER_DIVIDE_BY_ZERO: |
| 886 | DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_DIVIDE_BY_ZERO"); |
| 887 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 888 | break; |
| 889 | case STATUS_INTEGER_OVERFLOW: |
| 890 | DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_OVERFLOW"); |
| 891 | ourstatus->value.sig = TARGET_SIGNAL_FPE; |
| 892 | break; |
| 893 | case EXCEPTION_BREAKPOINT: |
| 894 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT"); |
| 895 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; |
| 896 | break; |
| 897 | case DBG_CONTROL_C: |
| 898 | DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_C"); |
| 899 | ourstatus->value.sig = TARGET_SIGNAL_INT; |
| 900 | break; |
| 901 | case DBG_CONTROL_BREAK: |
| 902 | DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_BREAK"); |
| 903 | ourstatus->value.sig = TARGET_SIGNAL_INT; |
| 904 | break; |
| 905 | case EXCEPTION_SINGLE_STEP: |
| 906 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_SINGLE_STEP"); |
| 907 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; |
| 908 | break; |
| 909 | case EXCEPTION_ILLEGAL_INSTRUCTION: |
| 910 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ILLEGAL_INSTRUCTION"); |
| 911 | ourstatus->value.sig = TARGET_SIGNAL_ILL; |
| 912 | break; |
| 913 | case EXCEPTION_PRIV_INSTRUCTION: |
| 914 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_PRIV_INSTRUCTION"); |
| 915 | ourstatus->value.sig = TARGET_SIGNAL_ILL; |
| 916 | break; |
| 917 | case EXCEPTION_NONCONTINUABLE_EXCEPTION: |
| 918 | DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_NONCONTINUABLE_EXCEPTION"); |
| 919 | ourstatus->value.sig = TARGET_SIGNAL_ILL; |
| 920 | break; |
| 921 | default: |
| 922 | if (current_event.u.Exception.dwFirstChance) |
| 923 | return 0; |
| 924 | printf_unfiltered ("gdb: unknown target exception 0x%08lx at 0x%08lx\n", |
| 925 | current_event.u.Exception.ExceptionRecord.ExceptionCode, |
| 926 | (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress); |
| 927 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; |
| 928 | break; |
| 929 | } |
| 930 | exception_count++; |
| 931 | last_sig = ourstatus->value.sig; |
| 932 | return 1; |
| 933 | } |
| 934 | |
| 935 | /* Resume all artificially suspended threads if we are continuing |
| 936 | execution */ |
| 937 | static BOOL |
| 938 | child_continue (DWORD continue_status, int id) |
| 939 | { |
| 940 | int i; |
| 941 | thread_info *th; |
| 942 | BOOL res; |
| 943 | |
| 944 | DEBUG_EVENTS (("ContinueDebugEvent (cpid=%ld, ctid=%ld, %s);\n", |
| 945 | current_event.dwProcessId, current_event.dwThreadId, |
| 946 | continue_status == DBG_CONTINUE ? |
| 947 | "DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED")); |
| 948 | res = ContinueDebugEvent (current_event.dwProcessId, |
| 949 | current_event.dwThreadId, |
| 950 | continue_status); |
| 951 | continue_status = 0; |
| 952 | if (res) |
| 953 | for (th = &thread_head; (th = th->next) != NULL;) |
| 954 | if (((id == -1) || (id == (int) th->id)) && th->suspend_count) |
| 955 | { |
| 956 | |
| 957 | for (i = 0; i < th->suspend_count; i++) |
| 958 | (void) ResumeThread (th->h); |
| 959 | th->suspend_count = 0; |
| 960 | if (debug_registers_changed) |
| 961 | { |
| 962 | /* Only change the value of the debug reisters */ |
| 963 | th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; |
| 964 | th->context.Dr0 = dr[0]; |
| 965 | th->context.Dr1 = dr[1]; |
| 966 | th->context.Dr2 = dr[2]; |
| 967 | th->context.Dr3 = dr[3]; |
| 968 | /* th->context.Dr6 = dr[6]; |
| 969 | FIXME: should we set dr6 also ?? */ |
| 970 | th->context.Dr7 = dr[7]; |
| 971 | CHECK (SetThreadContext (th->h, &th->context)); |
| 972 | th->context.ContextFlags = 0; |
| 973 | } |
| 974 | } |
| 975 | |
| 976 | debug_registers_changed = 0; |
| 977 | return res; |
| 978 | } |
| 979 | |
| 980 | /* Get the next event from the child. Return 1 if the event requires |
| 981 | handling by WFI (or whatever). |
| 982 | */ |
| 983 | static int |
| 984 | get_child_debug_event (int pid, struct target_waitstatus *ourstatus) |
| 985 | { |
| 986 | BOOL debug_event; |
| 987 | DWORD continue_status, event_code; |
| 988 | thread_info *th = NULL; |
| 989 | static thread_info dummy_thread_info; |
| 990 | int retval = 0; |
| 991 | |
| 992 | last_sig = TARGET_SIGNAL_0; |
| 993 | |
| 994 | if (!(debug_event = WaitForDebugEvent (¤t_event, 1000))) |
| 995 | goto out; |
| 996 | |
| 997 | event_count++; |
| 998 | continue_status = DBG_CONTINUE; |
| 999 | |
| 1000 | event_code = current_event.dwDebugEventCode; |
| 1001 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; |
| 1002 | |
| 1003 | switch (event_code) |
| 1004 | { |
| 1005 | case CREATE_THREAD_DEBUG_EVENT: |
| 1006 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%x code=%s)\n", |
| 1007 | (unsigned) current_event.dwProcessId, |
| 1008 | (unsigned) current_event.dwThreadId, |
| 1009 | "CREATE_THREAD_DEBUG_EVENT")); |
| 1010 | /* Record the existence of this thread */ |
| 1011 | th = child_add_thread (current_event.dwThreadId, |
| 1012 | current_event.u.CreateThread.hThread); |
| 1013 | if (info_verbose) |
| 1014 | printf_unfiltered ("[New %s]\n", |
| 1015 | target_pid_to_str ( |
| 1016 | pid_to_ptid (current_event.dwThreadId))); |
| 1017 | retval = current_event.dwThreadId; |
| 1018 | break; |
| 1019 | |
| 1020 | case EXIT_THREAD_DEBUG_EVENT: |
| 1021 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1022 | (unsigned) current_event.dwProcessId, |
| 1023 | (unsigned) current_event.dwThreadId, |
| 1024 | "EXIT_THREAD_DEBUG_EVENT")); |
| 1025 | child_delete_thread (current_event.dwThreadId); |
| 1026 | th = &dummy_thread_info; |
| 1027 | break; |
| 1028 | |
| 1029 | case CREATE_PROCESS_DEBUG_EVENT: |
| 1030 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1031 | (unsigned) current_event.dwProcessId, |
| 1032 | (unsigned) current_event.dwThreadId, |
| 1033 | "CREATE_PROCESS_DEBUG_EVENT")); |
| 1034 | CloseHandle (current_event.u.CreateProcessInfo.hFile); |
| 1035 | current_process_handle = current_event.u.CreateProcessInfo.hProcess; |
| 1036 | |
| 1037 | main_thread_id = current_event.dwThreadId; |
| 1038 | /* Add the main thread */ |
| 1039 | #if 0 |
| 1040 | th = child_add_thread (current_event.dwProcessId, |
| 1041 | current_event.u.CreateProcessInfo.hProcess); |
| 1042 | #endif |
| 1043 | th = child_add_thread (main_thread_id, |
| 1044 | current_event.u.CreateProcessInfo.hThread); |
| 1045 | retval = ourstatus->value.related_pid = current_event.dwThreadId; |
| 1046 | break; |
| 1047 | |
| 1048 | case EXIT_PROCESS_DEBUG_EVENT: |
| 1049 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1050 | (unsigned) current_event.dwProcessId, |
| 1051 | (unsigned) current_event.dwThreadId, |
| 1052 | "EXIT_PROCESS_DEBUG_EVENT")); |
| 1053 | ourstatus->kind = TARGET_WAITKIND_EXITED; |
| 1054 | ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode; |
| 1055 | CloseHandle (current_process_handle); |
| 1056 | retval = main_thread_id; |
| 1057 | break; |
| 1058 | |
| 1059 | case LOAD_DLL_DEBUG_EVENT: |
| 1060 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1061 | (unsigned) current_event.dwProcessId, |
| 1062 | (unsigned) current_event.dwThreadId, |
| 1063 | "LOAD_DLL_DEBUG_EVENT")); |
| 1064 | CloseHandle (current_event.u.LoadDll.hFile); |
| 1065 | catch_errors (handle_load_dll, NULL, (char *) "", RETURN_MASK_ALL); |
| 1066 | registers_changed (); /* mark all regs invalid */ |
| 1067 | ourstatus->kind = TARGET_WAITKIND_LOADED; |
| 1068 | ourstatus->value.integer = 0; |
| 1069 | retval = main_thread_id; |
| 1070 | break; |
| 1071 | |
| 1072 | case UNLOAD_DLL_DEBUG_EVENT: |
| 1073 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1074 | (unsigned) current_event.dwProcessId, |
| 1075 | (unsigned) current_event.dwThreadId, |
| 1076 | "UNLOAD_DLL_DEBUG_EVENT")); |
| 1077 | catch_errors (handle_unload_dll, NULL, (char *) "", RETURN_MASK_ALL); |
| 1078 | registers_changed (); /* mark all regs invalid */ |
| 1079 | /* ourstatus->kind = TARGET_WAITKIND_UNLOADED; |
| 1080 | does not exist yet. */ |
| 1081 | break; |
| 1082 | |
| 1083 | case EXCEPTION_DEBUG_EVENT: |
| 1084 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1085 | (unsigned) current_event.dwProcessId, |
| 1086 | (unsigned) current_event.dwThreadId, |
| 1087 | "EXCEPTION_DEBUG_EVENT")); |
| 1088 | if (handle_exception (ourstatus)) |
| 1089 | retval = current_event.dwThreadId; |
| 1090 | break; |
| 1091 | |
| 1092 | case OUTPUT_DEBUG_STRING_EVENT: /* message from the kernel */ |
| 1093 | DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n", |
| 1094 | (unsigned) current_event.dwProcessId, |
| 1095 | (unsigned) current_event.dwThreadId, |
| 1096 | "OUTPUT_DEBUG_STRING_EVENT")); |
| 1097 | if (handle_output_debug_string (ourstatus)) |
| 1098 | retval = main_thread_id; |
| 1099 | break; |
| 1100 | |
| 1101 | default: |
| 1102 | printf_unfiltered ("gdb: kernel event for pid=%ld tid=%ld\n", |
| 1103 | (DWORD) current_event.dwProcessId, |
| 1104 | (DWORD) current_event.dwThreadId); |
| 1105 | printf_unfiltered (" unknown event code %ld\n", |
| 1106 | current_event.dwDebugEventCode); |
| 1107 | break; |
| 1108 | } |
| 1109 | |
| 1110 | if (!retval) |
| 1111 | CHECK (child_continue (continue_status, -1)); |
| 1112 | else |
| 1113 | { |
| 1114 | current_thread = th ? : thread_rec (current_event.dwThreadId, TRUE); |
| 1115 | inferior_ptid = pid_to_ptid (retval); |
| 1116 | } |
| 1117 | |
| 1118 | out: |
| 1119 | return retval; |
| 1120 | } |
| 1121 | |
| 1122 | /* Wait for interesting events to occur in the target process. */ |
| 1123 | static ptid_t |
| 1124 | child_wait (ptid_t ptid, struct target_waitstatus *ourstatus) |
| 1125 | { |
| 1126 | int pid = PIDGET (ptid); |
| 1127 | |
| 1128 | /* We loop when we get a non-standard exception rather than return |
| 1129 | with a SPURIOUS because resume can try and step or modify things, |
| 1130 | which needs a current_thread->h. But some of these exceptions mark |
| 1131 | the birth or death of threads, which mean that the current thread |
| 1132 | isn't necessarily what you think it is. */ |
| 1133 | |
| 1134 | while (1) |
| 1135 | { |
| 1136 | int retval = get_child_debug_event (pid, ourstatus); |
| 1137 | if (retval) |
| 1138 | return pid_to_ptid (retval); |
| 1139 | else |
| 1140 | { |
| 1141 | int detach = 0; |
| 1142 | |
| 1143 | if (ui_loop_hook != NULL) |
| 1144 | detach = ui_loop_hook (0); |
| 1145 | |
| 1146 | if (detach) |
| 1147 | child_kill_inferior (); |
| 1148 | } |
| 1149 | } |
| 1150 | } |
| 1151 | |
| 1152 | static void |
| 1153 | do_initial_child_stuff (DWORD pid) |
| 1154 | { |
| 1155 | extern int stop_after_trap; |
| 1156 | int i; |
| 1157 | |
| 1158 | last_sig = TARGET_SIGNAL_0; |
| 1159 | event_count = 0; |
| 1160 | exception_count = 0; |
| 1161 | debug_registers_changed = 0; |
| 1162 | debug_registers_used = 0; |
| 1163 | for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++) |
| 1164 | dr[i] = 0; |
| 1165 | current_event.dwProcessId = pid; |
| 1166 | memset (¤t_event, 0, sizeof (current_event)); |
| 1167 | push_target (&child_ops); |
| 1168 | child_init_thread_list (); |
| 1169 | child_clear_solibs (); |
| 1170 | clear_proceed_status (); |
| 1171 | init_wait_for_inferior (); |
| 1172 | |
| 1173 | target_terminal_init (); |
| 1174 | target_terminal_inferior (); |
| 1175 | |
| 1176 | while (1) |
| 1177 | { |
| 1178 | stop_after_trap = 1; |
| 1179 | wait_for_inferior (); |
| 1180 | if (stop_signal != TARGET_SIGNAL_TRAP) |
| 1181 | resume (0, stop_signal); |
| 1182 | else |
| 1183 | break; |
| 1184 | } |
| 1185 | stop_after_trap = 0; |
| 1186 | return; |
| 1187 | } |
| 1188 | |
| 1189 | /* Since Windows XP, detaching from a process is supported by Windows. |
| 1190 | The following code tries loading the appropriate functions dynamically. |
| 1191 | If loading these functions succeeds use them to actually detach from |
| 1192 | the inferior process, otherwise behave as usual, pretending that |
| 1193 | detach has worked. */ |
| 1194 | static BOOL WINAPI (*DebugSetProcessKillOnExit)(BOOL); |
| 1195 | static BOOL WINAPI (*DebugActiveProcessStop)(DWORD); |
| 1196 | |
| 1197 | static int |
| 1198 | has_detach_ability () |
| 1199 | { |
| 1200 | static HMODULE kernel32 = NULL; |
| 1201 | |
| 1202 | if (!kernel32) |
| 1203 | kernel32 = LoadLibrary ("kernel32.dll"); |
| 1204 | if (kernel32) |
| 1205 | { |
| 1206 | if (!DebugSetProcessKillOnExit) |
| 1207 | DebugSetProcessKillOnExit = GetProcAddress (kernel32, |
| 1208 | "DebugSetProcessKillOnExit"); |
| 1209 | if (!DebugActiveProcessStop) |
| 1210 | DebugActiveProcessStop = GetProcAddress (kernel32, |
| 1211 | "DebugActiveProcessStop"); |
| 1212 | if (DebugSetProcessKillOnExit && DebugActiveProcessStop) |
| 1213 | return 1; |
| 1214 | } |
| 1215 | return 0; |
| 1216 | } |
| 1217 | |
| 1218 | /* Attach to process PID, then initialize for debugging it. */ |
| 1219 | static void |
| 1220 | child_attach (char *args, int from_tty) |
| 1221 | { |
| 1222 | BOOL ok; |
| 1223 | DWORD pid; |
| 1224 | |
| 1225 | if (!args) |
| 1226 | error_no_arg ("process-id to attach"); |
| 1227 | |
| 1228 | pid = strtoul (args, 0, 0); |
| 1229 | ok = DebugActiveProcess (pid); |
| 1230 | |
| 1231 | if (!ok) |
| 1232 | error ("Can't attach to process."); |
| 1233 | |
| 1234 | if (has_detach_ability ()) |
| 1235 | { |
| 1236 | attach_flag = 1; |
| 1237 | DebugSetProcessKillOnExit (FALSE); |
| 1238 | } |
| 1239 | |
| 1240 | if (from_tty) |
| 1241 | { |
| 1242 | char *exec_file = (char *) get_exec_file (0); |
| 1243 | |
| 1244 | if (exec_file) |
| 1245 | printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, |
| 1246 | target_pid_to_str (pid_to_ptid (pid))); |
| 1247 | else |
| 1248 | printf_unfiltered ("Attaching to %s\n", |
| 1249 | target_pid_to_str (pid_to_ptid (pid))); |
| 1250 | |
| 1251 | gdb_flush (gdb_stdout); |
| 1252 | } |
| 1253 | |
| 1254 | do_initial_child_stuff (pid); |
| 1255 | target_terminal_ours (); |
| 1256 | } |
| 1257 | |
| 1258 | static void |
| 1259 | child_detach (char *args, int from_tty) |
| 1260 | { |
| 1261 | int detached = 1; |
| 1262 | |
| 1263 | if (has_detach_ability ()) |
| 1264 | { |
| 1265 | delete_command (NULL, 0); |
| 1266 | child_continue (DBG_CONTINUE, -1); |
| 1267 | if (!DebugActiveProcessStop (current_event.dwProcessId)) |
| 1268 | { |
| 1269 | error ("Can't detach process %lu (error %lu)", |
| 1270 | current_event.dwProcessId, GetLastError ()); |
| 1271 | detached = 0; |
| 1272 | } |
| 1273 | DebugSetProcessKillOnExit (FALSE); |
| 1274 | } |
| 1275 | if (detached && from_tty) |
| 1276 | { |
| 1277 | char *exec_file = get_exec_file (0); |
| 1278 | if (exec_file == 0) |
| 1279 | exec_file = ""; |
| 1280 | printf_unfiltered ("Detaching from program: %s, Pid %lu\n", exec_file, |
| 1281 | current_event.dwProcessId); |
| 1282 | gdb_flush (gdb_stdout); |
| 1283 | } |
| 1284 | inferior_ptid = null_ptid; |
| 1285 | unpush_target (&child_ops); |
| 1286 | } |
| 1287 | |
| 1288 | /* Print status information about what we're accessing. */ |
| 1289 | |
| 1290 | static void |
| 1291 | child_files_info (struct target_ops *ignore) |
| 1292 | { |
| 1293 | printf_unfiltered ("\tUsing the running image of %s %s.\n", |
| 1294 | attach_flag ? "attached" : "child", target_pid_to_str (inferior_ptid)); |
| 1295 | } |
| 1296 | |
| 1297 | /* ARGSUSED */ |
| 1298 | static void |
| 1299 | child_open (char *arg, int from_tty) |
| 1300 | { |
| 1301 | error ("Use the \"run\" command to start a Unix child process."); |
| 1302 | } |
| 1303 | |
| 1304 | /* Start an inferior win32 child process and sets inferior_ptid to its pid. |
| 1305 | EXEC_FILE is the file to run. |
| 1306 | ALLARGS is a string containing the arguments to the program. |
| 1307 | ENV is the environment vector to pass. Errors reported with error(). */ |
| 1308 | |
| 1309 | static void |
| 1310 | child_create_inferior (char *exec_file, char *allargs, char **env) |
| 1311 | { |
| 1312 | char real_path[MAXPATHLEN]; |
| 1313 | char *winenv; |
| 1314 | char *temp; |
| 1315 | int envlen; |
| 1316 | int i; |
| 1317 | STARTUPINFO si; |
| 1318 | PROCESS_INFORMATION pi; |
| 1319 | BOOL ret; |
| 1320 | DWORD flags; |
| 1321 | char *args; |
| 1322 | |
| 1323 | if (!exec_file) |
| 1324 | error ("No executable specified, use `target exec'.\n"); |
| 1325 | |
| 1326 | memset (&si, 0, sizeof (si)); |
| 1327 | si.cb = sizeof (si); |
| 1328 | |
| 1329 | cygwin_conv_to_win32_path (exec_file, real_path); |
| 1330 | |
| 1331 | flags = DEBUG_ONLY_THIS_PROCESS; |
| 1332 | |
| 1333 | if (new_group) |
| 1334 | flags |= CREATE_NEW_PROCESS_GROUP; |
| 1335 | |
| 1336 | if (new_console) |
| 1337 | flags |= CREATE_NEW_CONSOLE; |
| 1338 | |
| 1339 | args = alloca (strlen (real_path) + strlen (allargs) + 2); |
| 1340 | |
| 1341 | strcpy (args, real_path); |
| 1342 | |
| 1343 | strcat (args, " "); |
| 1344 | strcat (args, allargs); |
| 1345 | |
| 1346 | /* Prepare the environment vars for CreateProcess. */ |
| 1347 | { |
| 1348 | /* This code use to assume all env vars were file names and would |
| 1349 | translate them all to win32 style. That obviously doesn't work in the |
| 1350 | general case. The current rule is that we only translate PATH. |
| 1351 | We need to handle PATH because we're about to call CreateProcess and |
| 1352 | it uses PATH to find DLL's. Fortunately PATH has a well-defined value |
| 1353 | in both posix and win32 environments. cygwin.dll will change it back |
| 1354 | to posix style if necessary. */ |
| 1355 | |
| 1356 | static const char *conv_path_names[] = |
| 1357 | { |
| 1358 | "PATH=", |
| 1359 | 0 |
| 1360 | }; |
| 1361 | |
| 1362 | /* CreateProcess takes the environment list as a null terminated set of |
| 1363 | strings (i.e. two nulls terminate the list). */ |
| 1364 | |
| 1365 | /* Get total size for env strings. */ |
| 1366 | for (envlen = 0, i = 0; env[i] && *env[i]; i++) |
| 1367 | { |
| 1368 | int j, len; |
| 1369 | |
| 1370 | for (j = 0; conv_path_names[j]; j++) |
| 1371 | { |
| 1372 | len = strlen (conv_path_names[j]); |
| 1373 | if (strncmp (conv_path_names[j], env[i], len) == 0) |
| 1374 | { |
| 1375 | if (cygwin_posix_path_list_p (env[i] + len)) |
| 1376 | envlen += len |
| 1377 | + cygwin_posix_to_win32_path_list_buf_size (env[i] + len); |
| 1378 | else |
| 1379 | envlen += strlen (env[i]) + 1; |
| 1380 | break; |
| 1381 | } |
| 1382 | } |
| 1383 | if (conv_path_names[j] == NULL) |
| 1384 | envlen += strlen (env[i]) + 1; |
| 1385 | } |
| 1386 | |
| 1387 | winenv = alloca (envlen + 1); |
| 1388 | |
| 1389 | /* Copy env strings into new buffer. */ |
| 1390 | for (temp = winenv, i = 0; env[i] && *env[i]; i++) |
| 1391 | { |
| 1392 | int j, len; |
| 1393 | |
| 1394 | for (j = 0; conv_path_names[j]; j++) |
| 1395 | { |
| 1396 | len = strlen (conv_path_names[j]); |
| 1397 | if (strncmp (conv_path_names[j], env[i], len) == 0) |
| 1398 | { |
| 1399 | if (cygwin_posix_path_list_p (env[i] + len)) |
| 1400 | { |
| 1401 | memcpy (temp, env[i], len); |
| 1402 | cygwin_posix_to_win32_path_list (env[i] + len, temp + len); |
| 1403 | } |
| 1404 | else |
| 1405 | strcpy (temp, env[i]); |
| 1406 | break; |
| 1407 | } |
| 1408 | } |
| 1409 | if (conv_path_names[j] == NULL) |
| 1410 | strcpy (temp, env[i]); |
| 1411 | |
| 1412 | temp += strlen (temp) + 1; |
| 1413 | } |
| 1414 | |
| 1415 | /* Final nil string to terminate new env. */ |
| 1416 | *temp = 0; |
| 1417 | } |
| 1418 | |
| 1419 | ret = CreateProcess (0, |
| 1420 | args, /* command line */ |
| 1421 | NULL, /* Security */ |
| 1422 | NULL, /* thread */ |
| 1423 | TRUE, /* inherit handles */ |
| 1424 | flags, /* start flags */ |
| 1425 | winenv, |
| 1426 | NULL, /* current directory */ |
| 1427 | &si, |
| 1428 | &pi); |
| 1429 | if (!ret) |
| 1430 | error ("Error creating process %s, (error %d)\n", exec_file, GetLastError ()); |
| 1431 | |
| 1432 | CloseHandle (pi.hThread); |
| 1433 | CloseHandle (pi.hProcess); |
| 1434 | do_initial_child_stuff (pi.dwProcessId); |
| 1435 | |
| 1436 | /* child_continue (DBG_CONTINUE, -1); */ |
| 1437 | proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_0, 0); |
| 1438 | } |
| 1439 | |
| 1440 | static void |
| 1441 | child_mourn_inferior (void) |
| 1442 | { |
| 1443 | (void) child_continue (DBG_CONTINUE, -1); |
| 1444 | i386_cleanup_dregs(); |
| 1445 | unpush_target (&child_ops); |
| 1446 | generic_mourn_inferior (); |
| 1447 | } |
| 1448 | |
| 1449 | /* Send a SIGINT to the process group. This acts just like the user typed a |
| 1450 | ^C on the controlling terminal. */ |
| 1451 | |
| 1452 | static void |
| 1453 | child_stop (void) |
| 1454 | { |
| 1455 | DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n")); |
| 1456 | CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId)); |
| 1457 | registers_changed (); /* refresh register state */ |
| 1458 | } |
| 1459 | |
| 1460 | int |
| 1461 | child_xfer_memory (CORE_ADDR memaddr, char *our, int len, |
| 1462 | int write, struct mem_attrib *mem, |
| 1463 | struct target_ops *target) |
| 1464 | { |
| 1465 | DWORD done; |
| 1466 | if (write) |
| 1467 | { |
| 1468 | DEBUG_MEM (("gdb: write target memory, %d bytes at 0x%08lx\n", |
| 1469 | len, (DWORD) memaddr)); |
| 1470 | WriteProcessMemory (current_process_handle, (LPVOID) memaddr, our, |
| 1471 | len, &done); |
| 1472 | FlushInstructionCache (current_process_handle, (LPCVOID) memaddr, len); |
| 1473 | } |
| 1474 | else |
| 1475 | { |
| 1476 | DEBUG_MEM (("gdb: read target memory, %d bytes at 0x%08lx\n", |
| 1477 | len, (DWORD) memaddr)); |
| 1478 | ReadProcessMemory (current_process_handle, (LPCVOID) memaddr, our, len, |
| 1479 | &done); |
| 1480 | } |
| 1481 | return done; |
| 1482 | } |
| 1483 | |
| 1484 | void |
| 1485 | child_kill_inferior (void) |
| 1486 | { |
| 1487 | CHECK (TerminateProcess (current_process_handle, 0)); |
| 1488 | |
| 1489 | for (;;) |
| 1490 | { |
| 1491 | if (!child_continue (DBG_CONTINUE, -1)) |
| 1492 | break; |
| 1493 | if (!WaitForDebugEvent (¤t_event, INFINITE)) |
| 1494 | break; |
| 1495 | if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT) |
| 1496 | break; |
| 1497 | } |
| 1498 | |
| 1499 | CHECK (CloseHandle (current_process_handle)); |
| 1500 | |
| 1501 | /* this may fail in an attached process so don't check. */ |
| 1502 | (void) CloseHandle (current_thread->h); |
| 1503 | target_mourn_inferior (); /* or just child_mourn_inferior? */ |
| 1504 | } |
| 1505 | |
| 1506 | void |
| 1507 | child_resume (ptid_t ptid, int step, enum target_signal sig) |
| 1508 | { |
| 1509 | thread_info *th; |
| 1510 | DWORD continue_status = DBG_CONTINUE; |
| 1511 | |
| 1512 | int pid = PIDGET (ptid); |
| 1513 | |
| 1514 | if (sig != TARGET_SIGNAL_0) |
| 1515 | { |
| 1516 | if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT) |
| 1517 | { |
| 1518 | DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig)); |
| 1519 | } |
| 1520 | else if (sig == last_sig) |
| 1521 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1522 | else |
| 1523 | #if 0 |
| 1524 | /* This code does not seem to work, because |
| 1525 | the kernel does probably not consider changes in the ExceptionRecord |
| 1526 | structure when passing the exception to the inferior. |
| 1527 | Note that this seems possible in the exception handler itself. */ |
| 1528 | { |
| 1529 | int i; |
| 1530 | for (i = 0; xlate[i].them != -1; i++) |
| 1531 | if (xlate[i].us == sig) |
| 1532 | { |
| 1533 | current_event.u.Exception.ExceptionRecord.ExceptionCode = |
| 1534 | xlate[i].them; |
| 1535 | continue_status = DBG_EXCEPTION_NOT_HANDLED; |
| 1536 | break; |
| 1537 | } |
| 1538 | if (continue_status == DBG_CONTINUE) |
| 1539 | { |
| 1540 | DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig)); |
| 1541 | } |
| 1542 | } |
| 1543 | #endif |
| 1544 | DEBUG_EXCEPT(("Can only continue with recieved signal %d.\n", |
| 1545 | last_sig)); |
| 1546 | } |
| 1547 | |
| 1548 | last_sig = TARGET_SIGNAL_0; |
| 1549 | |
| 1550 | DEBUG_EXEC (("gdb: child_resume (pid=%d, step=%d, sig=%d);\n", |
| 1551 | pid, step, sig)); |
| 1552 | |
| 1553 | /* Get context for currently selected thread */ |
| 1554 | th = thread_rec (current_event.dwThreadId, FALSE); |
| 1555 | if (th) |
| 1556 | { |
| 1557 | if (step) |
| 1558 | { |
| 1559 | /* Single step by setting t bit */ |
| 1560 | child_fetch_inferior_registers (PS_REGNUM); |
| 1561 | th->context.EFlags |= FLAG_TRACE_BIT; |
| 1562 | } |
| 1563 | |
| 1564 | if (th->context.ContextFlags) |
| 1565 | { |
| 1566 | if (debug_registers_changed) |
| 1567 | { |
| 1568 | th->context.Dr0 = dr[0]; |
| 1569 | th->context.Dr1 = dr[1]; |
| 1570 | th->context.Dr2 = dr[2]; |
| 1571 | th->context.Dr3 = dr[3]; |
| 1572 | /* th->context.Dr6 = dr[6]; |
| 1573 | FIXME: should we set dr6 also ?? */ |
| 1574 | th->context.Dr7 = dr[7]; |
| 1575 | } |
| 1576 | CHECK (SetThreadContext (th->h, &th->context)); |
| 1577 | th->context.ContextFlags = 0; |
| 1578 | } |
| 1579 | } |
| 1580 | |
| 1581 | /* Allow continuing with the same signal that interrupted us. |
| 1582 | Otherwise complain. */ |
| 1583 | |
| 1584 | child_continue (continue_status, pid); |
| 1585 | } |
| 1586 | |
| 1587 | static void |
| 1588 | child_prepare_to_store (void) |
| 1589 | { |
| 1590 | /* Do nothing, since we can store individual regs */ |
| 1591 | } |
| 1592 | |
| 1593 | static int |
| 1594 | child_can_run (void) |
| 1595 | { |
| 1596 | return 1; |
| 1597 | } |
| 1598 | |
| 1599 | static void |
| 1600 | child_close (int x) |
| 1601 | { |
| 1602 | DEBUG_EVENTS (("gdb: child_close, inferior_ptid=%d\n", |
| 1603 | PIDGET (inferior_ptid))); |
| 1604 | } |
| 1605 | |
| 1606 | struct target_ops child_ops; |
| 1607 | |
| 1608 | static void |
| 1609 | init_child_ops (void) |
| 1610 | { |
| 1611 | child_ops.to_shortname = "child"; |
| 1612 | child_ops.to_longname = "Win32 child process"; |
| 1613 | child_ops.to_doc = "Win32 child process (started by the \"run\" command)."; |
| 1614 | child_ops.to_open = child_open; |
| 1615 | child_ops.to_close = child_close; |
| 1616 | child_ops.to_attach = child_attach; |
| 1617 | child_ops.to_detach = child_detach; |
| 1618 | child_ops.to_resume = child_resume; |
| 1619 | child_ops.to_wait = child_wait; |
| 1620 | child_ops.to_fetch_registers = child_fetch_inferior_registers; |
| 1621 | child_ops.to_store_registers = child_store_inferior_registers; |
| 1622 | child_ops.to_prepare_to_store = child_prepare_to_store; |
| 1623 | child_ops.to_xfer_memory = child_xfer_memory; |
| 1624 | child_ops.to_files_info = child_files_info; |
| 1625 | child_ops.to_insert_breakpoint = memory_insert_breakpoint; |
| 1626 | child_ops.to_remove_breakpoint = memory_remove_breakpoint; |
| 1627 | child_ops.to_terminal_init = terminal_init_inferior; |
| 1628 | child_ops.to_terminal_inferior = terminal_inferior; |
| 1629 | child_ops.to_terminal_ours_for_output = terminal_ours_for_output; |
| 1630 | child_ops.to_terminal_ours = terminal_ours; |
| 1631 | child_ops.to_terminal_info = child_terminal_info; |
| 1632 | child_ops.to_kill = child_kill_inferior; |
| 1633 | child_ops.to_load = 0; |
| 1634 | child_ops.to_lookup_symbol = 0; |
| 1635 | child_ops.to_create_inferior = child_create_inferior; |
| 1636 | child_ops.to_mourn_inferior = child_mourn_inferior; |
| 1637 | child_ops.to_can_run = child_can_run; |
| 1638 | child_ops.to_notice_signals = 0; |
| 1639 | child_ops.to_thread_alive = win32_child_thread_alive; |
| 1640 | child_ops.to_pid_to_str = cygwin_pid_to_str; |
| 1641 | child_ops.to_stop = child_stop; |
| 1642 | child_ops.to_stratum = process_stratum; |
| 1643 | child_ops.DONT_USE = 0; |
| 1644 | child_ops.to_has_all_memory = 1; |
| 1645 | child_ops.to_has_memory = 1; |
| 1646 | child_ops.to_has_stack = 1; |
| 1647 | child_ops.to_has_registers = 1; |
| 1648 | child_ops.to_has_execution = 1; |
| 1649 | child_ops.to_sections = 0; |
| 1650 | child_ops.to_sections_end = 0; |
| 1651 | child_ops.to_magic = OPS_MAGIC; |
| 1652 | } |
| 1653 | |
| 1654 | void |
| 1655 | _initialize_inftarg (void) |
| 1656 | { |
| 1657 | struct cmd_list_element *c; |
| 1658 | |
| 1659 | init_child_ops (); |
| 1660 | |
| 1661 | c = add_com ("dll-symbols", class_files, dll_symbol_command, |
| 1662 | "Load dll library symbols from FILE."); |
| 1663 | c->completer = filename_completer; |
| 1664 | |
| 1665 | add_com_alias ("sharedlibrary", "dll-symbols", class_alias, 1); |
| 1666 | |
| 1667 | add_show_from_set (add_set_cmd ("new-console", class_support, var_boolean, |
| 1668 | (char *) &new_console, |
| 1669 | "Set creation of new console when creating child process.", |
| 1670 | &setlist), |
| 1671 | &showlist); |
| 1672 | |
| 1673 | add_show_from_set (add_set_cmd ("new-group", class_support, var_boolean, |
| 1674 | (char *) &new_group, |
| 1675 | "Set creation of new group when creating child process.", |
| 1676 | &setlist), |
| 1677 | &showlist); |
| 1678 | |
| 1679 | add_show_from_set (add_set_cmd ("debugexec", class_support, var_boolean, |
| 1680 | (char *) &debug_exec, |
| 1681 | "Set whether to display execution in child process.", |
| 1682 | &setlist), |
| 1683 | &showlist); |
| 1684 | |
| 1685 | add_show_from_set (add_set_cmd ("debugevents", class_support, var_boolean, |
| 1686 | (char *) &debug_events, |
| 1687 | "Set whether to display kernel events in child process.", |
| 1688 | &setlist), |
| 1689 | &showlist); |
| 1690 | |
| 1691 | add_show_from_set (add_set_cmd ("debugmemory", class_support, var_boolean, |
| 1692 | (char *) &debug_memory, |
| 1693 | "Set whether to display memory accesses in child process.", |
| 1694 | &setlist), |
| 1695 | &showlist); |
| 1696 | |
| 1697 | add_show_from_set (add_set_cmd ("debugexceptions", class_support, var_boolean, |
| 1698 | (char *) &debug_exceptions, |
| 1699 | "Set whether to display kernel exceptions in child process.", |
| 1700 | &setlist), |
| 1701 | &showlist); |
| 1702 | |
| 1703 | add_info ("dll", info_dll_command, "Status of loaded DLLs."); |
| 1704 | add_info_alias ("sharedlibrary", "dll", 1); |
| 1705 | |
| 1706 | add_target (&child_ops); |
| 1707 | } |
| 1708 | |
| 1709 | /* Hardware watchpoint support, adapted from go32-nat.c code. */ |
| 1710 | |
| 1711 | /* Pass the address ADDR to the inferior in the I'th debug register. |
| 1712 | Here we just store the address in dr array, the registers will be |
| 1713 | actually set up when child_continue is called. */ |
| 1714 | void |
| 1715 | cygwin_set_dr (int i, CORE_ADDR addr) |
| 1716 | { |
| 1717 | if (i < 0 || i > 3) |
| 1718 | internal_error (__FILE__, __LINE__, |
| 1719 | "Invalid register %d in cygwin_set_dr.\n", i); |
| 1720 | dr[i] = (unsigned) addr; |
| 1721 | debug_registers_changed = 1; |
| 1722 | debug_registers_used = 1; |
| 1723 | } |
| 1724 | |
| 1725 | /* Pass the value VAL to the inferior in the DR7 debug control |
| 1726 | register. Here we just store the address in D_REGS, the watchpoint |
| 1727 | will be actually set up in child_wait. */ |
| 1728 | void |
| 1729 | cygwin_set_dr7 (unsigned val) |
| 1730 | { |
| 1731 | dr[7] = val; |
| 1732 | debug_registers_changed = 1; |
| 1733 | debug_registers_used = 1; |
| 1734 | } |
| 1735 | |
| 1736 | /* Get the value of the DR6 debug status register from the inferior. |
| 1737 | Here we just return the value stored in dr[6] |
| 1738 | by the last call to thread_rec for current_event.dwThreadId id. */ |
| 1739 | unsigned |
| 1740 | cygwin_get_dr6 (void) |
| 1741 | { |
| 1742 | return dr[6]; |
| 1743 | } |
| 1744 | |
| 1745 | |
| 1746 | /* Determine if the thread referenced by "pid" is alive |
| 1747 | by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0 |
| 1748 | it means that the pid has died. Otherwise it is assumed to be alive. */ |
| 1749 | static int |
| 1750 | win32_child_thread_alive (ptid_t ptid) |
| 1751 | { |
| 1752 | int pid = PIDGET (ptid); |
| 1753 | |
| 1754 | return WaitForSingleObject (thread_rec (pid, FALSE)->h, 0) == WAIT_OBJECT_0 ? |
| 1755 | FALSE : TRUE; |
| 1756 | } |
| 1757 | |
| 1758 | /* Convert pid to printable format. */ |
| 1759 | char * |
| 1760 | cygwin_pid_to_str (ptid_t ptid) |
| 1761 | { |
| 1762 | static char buf[80]; |
| 1763 | int pid = PIDGET (ptid); |
| 1764 | |
| 1765 | if ((DWORD) pid == current_event.dwProcessId) |
| 1766 | sprintf (buf, "process %d", pid); |
| 1767 | else |
| 1768 | sprintf (buf, "thread %ld.0x%x", current_event.dwProcessId, pid); |
| 1769 | return buf; |
| 1770 | } |
| 1771 | |
| 1772 | static int |
| 1773 | core_dll_symbols_add (char *dll_name, DWORD base_addr) |
| 1774 | { |
| 1775 | struct objfile *objfile; |
| 1776 | char *objfile_basename; |
| 1777 | const char *dll_basename; |
| 1778 | |
| 1779 | if (!(dll_basename = strrchr (dll_name, '/'))) |
| 1780 | dll_basename = dll_name; |
| 1781 | else |
| 1782 | dll_basename++; |
| 1783 | |
| 1784 | ALL_OBJFILES (objfile) |
| 1785 | { |
| 1786 | objfile_basename = strrchr (objfile->name, '/'); |
| 1787 | |
| 1788 | if (objfile_basename && |
| 1789 | strcmp (dll_basename, objfile_basename + 1) == 0) |
| 1790 | { |
| 1791 | printf_unfiltered ("%08lx:%s (symbols previously loaded)\n", |
| 1792 | base_addr, dll_name); |
| 1793 | goto out; |
| 1794 | } |
| 1795 | } |
| 1796 | |
| 1797 | register_loaded_dll (dll_name, base_addr + 0x1000); |
| 1798 | solib_symbols_add (dll_name, 0, (CORE_ADDR) base_addr + 0x1000); |
| 1799 | |
| 1800 | out: |
| 1801 | return 1; |
| 1802 | } |
| 1803 | |
| 1804 | typedef struct |
| 1805 | { |
| 1806 | struct target_ops *target; |
| 1807 | bfd_vma addr; |
| 1808 | } |
| 1809 | map_code_section_args; |
| 1810 | |
| 1811 | static void |
| 1812 | map_single_dll_code_section (bfd * abfd, asection * sect, void *obj) |
| 1813 | { |
| 1814 | int old; |
| 1815 | int update_coreops; |
| 1816 | struct section_table *new_target_sect_ptr; |
| 1817 | |
| 1818 | map_code_section_args *args = (map_code_section_args *) obj; |
| 1819 | struct target_ops *target = args->target; |
| 1820 | if (sect->flags & SEC_CODE) |
| 1821 | { |
| 1822 | update_coreops = core_ops.to_sections == target->to_sections; |
| 1823 | |
| 1824 | if (target->to_sections) |
| 1825 | { |
| 1826 | old = target->to_sections_end - target->to_sections; |
| 1827 | target->to_sections = (struct section_table *) |
| 1828 | xrealloc ((char *) target->to_sections, |
| 1829 | (sizeof (struct section_table)) * (1 + old)); |
| 1830 | } |
| 1831 | else |
| 1832 | { |
| 1833 | old = 0; |
| 1834 | target->to_sections = (struct section_table *) |
| 1835 | xmalloc ((sizeof (struct section_table))); |
| 1836 | } |
| 1837 | target->to_sections_end = target->to_sections + (1 + old); |
| 1838 | |
| 1839 | /* Update the to_sections field in the core_ops structure |
| 1840 | if needed. */ |
| 1841 | if (update_coreops) |
| 1842 | { |
| 1843 | core_ops.to_sections = target->to_sections; |
| 1844 | core_ops.to_sections_end = target->to_sections_end; |
| 1845 | } |
| 1846 | new_target_sect_ptr = target->to_sections + old; |
| 1847 | new_target_sect_ptr->addr = args->addr + bfd_section_vma (abfd, sect); |
| 1848 | new_target_sect_ptr->endaddr = args->addr + bfd_section_vma (abfd, sect) + |
| 1849 | bfd_section_size (abfd, sect);; |
| 1850 | new_target_sect_ptr->the_bfd_section = sect; |
| 1851 | new_target_sect_ptr->bfd = abfd; |
| 1852 | } |
| 1853 | } |
| 1854 | |
| 1855 | static int |
| 1856 | dll_code_sections_add (const char *dll_name, int base_addr, struct target_ops *target) |
| 1857 | { |
| 1858 | bfd *dll_bfd; |
| 1859 | map_code_section_args map_args; |
| 1860 | asection *lowest_sect; |
| 1861 | char *name; |
| 1862 | if (dll_name == NULL || target == NULL) |
| 1863 | return 0; |
| 1864 | name = xstrdup (dll_name); |
| 1865 | dll_bfd = bfd_openr (name, "pei-i386"); |
| 1866 | if (dll_bfd == NULL) |
| 1867 | return 0; |
| 1868 | |
| 1869 | if (bfd_check_format (dll_bfd, bfd_object)) |
| 1870 | { |
| 1871 | lowest_sect = bfd_get_section_by_name (dll_bfd, ".text"); |
| 1872 | if (lowest_sect == NULL) |
| 1873 | return 0; |
| 1874 | map_args.target = target; |
| 1875 | map_args.addr = base_addr - bfd_section_vma (dll_bfd, lowest_sect); |
| 1876 | |
| 1877 | bfd_map_over_sections (dll_bfd, &map_single_dll_code_section, (void *) (&map_args)); |
| 1878 | } |
| 1879 | |
| 1880 | return 1; |
| 1881 | } |
| 1882 | |
| 1883 | static void |
| 1884 | core_section_load_dll_symbols (bfd * abfd, asection * sect, void *obj) |
| 1885 | { |
| 1886 | struct target_ops *target = (struct target_ops *) obj; |
| 1887 | |
| 1888 | DWORD base_addr; |
| 1889 | |
| 1890 | int dll_name_size; |
| 1891 | char *dll_name = NULL; |
| 1892 | char *buf = NULL; |
| 1893 | struct win32_pstatus *pstatus; |
| 1894 | char *p; |
| 1895 | |
| 1896 | if (strncmp (sect->name, ".module", 7)) |
| 1897 | return; |
| 1898 | |
| 1899 | buf = (char *) xmalloc (sect->_raw_size + 1); |
| 1900 | if (!buf) |
| 1901 | { |
| 1902 | printf_unfiltered ("memory allocation failed for %s\n", sect->name); |
| 1903 | goto out; |
| 1904 | } |
| 1905 | if (!bfd_get_section_contents (abfd, sect, buf, 0, sect->_raw_size)) |
| 1906 | goto out; |
| 1907 | |
| 1908 | pstatus = (struct win32_pstatus *) buf; |
| 1909 | |
| 1910 | memmove (&base_addr, &(pstatus->data.module_info.base_address), sizeof (base_addr)); |
| 1911 | dll_name_size = pstatus->data.module_info.module_name_size; |
| 1912 | if (offsetof (struct win32_pstatus, data.module_info.module_name) + dll_name_size > sect->_raw_size) |
| 1913 | goto out; |
| 1914 | |
| 1915 | dll_name = (char *) xmalloc (dll_name_size + 1); |
| 1916 | if (!dll_name) |
| 1917 | { |
| 1918 | printf_unfiltered ("memory allocation failed for %s\n", sect->name); |
| 1919 | goto out; |
| 1920 | } |
| 1921 | strncpy (dll_name, pstatus->data.module_info.module_name, dll_name_size); |
| 1922 | |
| 1923 | while ((p = strchr (dll_name, '\\'))) |
| 1924 | *p = '/'; |
| 1925 | |
| 1926 | if (!core_dll_symbols_add (dll_name, (DWORD) base_addr)) |
| 1927 | printf_unfiltered ("%s: Failed to load dll symbols.\n", dll_name); |
| 1928 | |
| 1929 | if (!dll_code_sections_add (dll_name, (DWORD) base_addr + 0x1000, target)) |
| 1930 | printf_unfiltered ("%s: Failed to map dll code sections.\n", dll_name); |
| 1931 | |
| 1932 | out: |
| 1933 | if (buf) |
| 1934 | xfree (buf); |
| 1935 | if (dll_name) |
| 1936 | xfree (dll_name); |
| 1937 | return; |
| 1938 | } |
| 1939 | |
| 1940 | void |
| 1941 | child_solib_add (char *filename, int from_tty, struct target_ops *target, |
| 1942 | int readsyms) |
| 1943 | { |
| 1944 | if (!readsyms) |
| 1945 | return; |
| 1946 | if (core_bfd) |
| 1947 | { |
| 1948 | child_clear_solibs (); |
| 1949 | bfd_map_over_sections (core_bfd, &core_section_load_dll_symbols, target); |
| 1950 | } |
| 1951 | else |
| 1952 | { |
| 1953 | if (solib_end && solib_end->name) |
| 1954 | solib_end->objfile = solib_symbols_add (solib_end->name, from_tty, |
| 1955 | solib_end->load_addr); |
| 1956 | } |
| 1957 | } |
| 1958 | |
| 1959 | static void |
| 1960 | fetch_elf_core_registers (char *core_reg_sect, |
| 1961 | unsigned core_reg_size, |
| 1962 | int which, |
| 1963 | CORE_ADDR reg_addr) |
| 1964 | { |
| 1965 | int r; |
| 1966 | if (core_reg_size < sizeof (CONTEXT)) |
| 1967 | { |
| 1968 | error ("Core file register section too small (%u bytes).", core_reg_size); |
| 1969 | return; |
| 1970 | } |
| 1971 | for (r = 0; r < NUM_REGS; r++) |
| 1972 | supply_register (r, core_reg_sect + mappings[r]); |
| 1973 | } |
| 1974 | |
| 1975 | static struct core_fns win32_elf_core_fns = |
| 1976 | { |
| 1977 | bfd_target_elf_flavour, |
| 1978 | default_check_format, |
| 1979 | default_core_sniffer, |
| 1980 | fetch_elf_core_registers, |
| 1981 | NULL |
| 1982 | }; |
| 1983 | |
| 1984 | void |
| 1985 | _initialize_core_win32 (void) |
| 1986 | { |
| 1987 | add_core_fns (&win32_elf_core_fns); |
| 1988 | } |
| 1989 | |
| 1990 | void |
| 1991 | _initialize_check_for_gdb_ini (void) |
| 1992 | { |
| 1993 | char *homedir; |
| 1994 | if (inhibit_gdbinit) |
| 1995 | return; |
| 1996 | |
| 1997 | homedir = getenv ("HOME"); |
| 1998 | if (homedir) |
| 1999 | { |
| 2000 | char *p; |
| 2001 | char *oldini = (char *) alloca (strlen (homedir) + |
| 2002 | sizeof ("/gdb.ini")); |
| 2003 | strcpy (oldini, homedir); |
| 2004 | p = strchr (oldini, '\0'); |
| 2005 | if (p > oldini && p[-1] != '/') |
| 2006 | *p++ = '/'; |
| 2007 | strcpy (p, "gdb.ini"); |
| 2008 | if (access (oldini, 0) == 0) |
| 2009 | { |
| 2010 | int len = strlen (oldini); |
| 2011 | char *newini = alloca (len + 1); |
| 2012 | sprintf (newini, "%.*s.gdbinit", |
| 2013 | (int) (len - (sizeof ("gdb.ini") - 1)), oldini); |
| 2014 | warning ("obsolete '%s' found. Rename to '%s'.", oldini, newini); |
| 2015 | } |
| 2016 | } |
| 2017 | } |