1 /* Target-vector operations for controlling windows child processes, for GDB.
3 Copyright (C) 1995-2013 Free Software Foundation, Inc.
5 Contributed by Cygnus Solutions, A Red Hat Company.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* Originally by Steve Chamberlain, sac@cygnus.com */
25 #include "frame.h" /* required by inferior.h */
28 #include "exceptions.h"
31 #include "completer.h"
35 #include <sys/types.h>
43 #include <sys/cygwin.h>
44 #include <cygwin/version.h>
49 #include "filenames.h"
53 #include "gdb_obstack.h"
54 #include "gdb_string.h"
55 #include "gdbthread.h"
57 #include <sys/param.h>
62 #include "xml-support.h"
64 #include "i386-tdep.h"
65 #include "i387-tdep.h"
67 #include "windows-tdep.h"
68 #include "windows-nat.h"
70 #include "complaints.h"
72 #define AdjustTokenPrivileges dyn_AdjustTokenPrivileges
73 #define DebugActiveProcessStop dyn_DebugActiveProcessStop
74 #define DebugBreakProcess dyn_DebugBreakProcess
75 #define DebugSetProcessKillOnExit dyn_DebugSetProcessKillOnExit
76 #define EnumProcessModules dyn_EnumProcessModules
77 #define GetModuleInformation dyn_GetModuleInformation
78 #define LookupPrivilegeValueA dyn_LookupPrivilegeValueA
79 #define OpenProcessToken dyn_OpenProcessToken
80 #define GetConsoleFontSize dyn_GetConsoleFontSize
81 #define GetCurrentConsoleFont dyn_GetCurrentConsoleFont
83 static BOOL WINAPI (*AdjustTokenPrivileges)(HANDLE, BOOL, PTOKEN_PRIVILEGES,
84 DWORD, PTOKEN_PRIVILEGES, PDWORD);
85 static BOOL WINAPI (*DebugActiveProcessStop) (DWORD);
86 static BOOL WINAPI (*DebugBreakProcess) (HANDLE);
87 static BOOL WINAPI (*DebugSetProcessKillOnExit) (BOOL);
88 static BOOL WINAPI (*EnumProcessModules) (HANDLE, HMODULE *, DWORD,
90 static BOOL WINAPI (*GetModuleInformation) (HANDLE, HMODULE, LPMODULEINFO,
92 static BOOL WINAPI (*LookupPrivilegeValueA)(LPCSTR, LPCSTR, PLUID);
93 static BOOL WINAPI (*OpenProcessToken)(HANDLE, DWORD, PHANDLE);
94 static BOOL WINAPI (*GetCurrentConsoleFont) (HANDLE, BOOL,
96 static COORD WINAPI (*GetConsoleFontSize) (HANDLE, DWORD);
98 static struct target_ops windows_ops;
102 #undef GetModuleFileNameEx
105 # define __PMAX (MAX_PATH + 1)
106 static DWORD WINAPI (*GetModuleFileNameEx) (HANDLE, HMODULE, LPSTR, DWORD);
107 # define STARTUPINFO STARTUPINFOA
108 # define CreateProcess CreateProcessA
109 # define GetModuleFileNameEx_name "GetModuleFileNameExA"
110 # define bad_GetModuleFileNameEx bad_GetModuleFileNameExA
112 # define __PMAX PATH_MAX
113 /* The starting and ending address of the cygwin1.dll text segment. */
114 static CORE_ADDR cygwin_load_start;
115 static CORE_ADDR cygwin_load_end;
117 typedef wchar_t cygwin_buf_t;
118 static DWORD WINAPI (*GetModuleFileNameEx) (HANDLE, HMODULE,
120 # define STARTUPINFO STARTUPINFOW
121 # define CreateProcess CreateProcessW
122 # define GetModuleFileNameEx_name "GetModuleFileNameExW"
123 # define bad_GetModuleFileNameEx bad_GetModuleFileNameExW
126 static int have_saved_context; /* True if we've saved context from a
128 static CONTEXT saved_context; /* Containes the saved context from a
131 /* If we're not using the old Cygwin header file set, define the
132 following which never should have been in the generic Win32 API
133 headers in the first place since they were our own invention... */
134 #ifndef _GNU_H_WINDOWS_H
137 FLAG_TRACE_BIT = 0x100,
138 CONTEXT_DEBUGGER = (CONTEXT_FULL | CONTEXT_FLOATING_POINT)
142 #ifndef CONTEXT_EXTENDED_REGISTERS
143 /* This macro is only defined on ia32. It only makes sense on this target,
144 so define it as zero if not already defined. */
145 #define CONTEXT_EXTENDED_REGISTERS 0
148 #define CONTEXT_DEBUGGER_DR CONTEXT_DEBUGGER | CONTEXT_DEBUG_REGISTERS \
149 | CONTEXT_EXTENDED_REGISTERS
151 static uintptr_t dr[8];
152 static int debug_registers_changed;
153 static int debug_registers_used;
155 static int windows_initialization_done;
156 #define DR6_CLEAR_VALUE 0xffff0ff0
158 /* The string sent by cygwin when it processes a signal.
159 FIXME: This should be in a cygwin include file. */
160 #ifndef _CYGWIN_SIGNAL_STRING
161 #define _CYGWIN_SIGNAL_STRING "cYgSiGw00f"
164 #define CHECK(x) check (x, __FILE__,__LINE__)
165 #define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x
166 #define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x
167 #define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x
168 #define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x
170 static void windows_stop (ptid_t);
171 static int windows_thread_alive (struct target_ops *, ptid_t);
172 static void windows_kill_inferior (struct target_ops *);
174 static void cygwin_set_dr (int i, CORE_ADDR addr);
175 static void cygwin_set_dr7 (unsigned long val);
176 static CORE_ADDR cygwin_get_dr (int i);
177 static unsigned long cygwin_get_dr6 (void);
178 static unsigned long cygwin_get_dr7 (void);
180 static enum gdb_signal last_sig = GDB_SIGNAL_0;
181 /* Set if a signal was received from the debugged process. */
183 /* Thread information structure used to track information that is
184 not available in gdb's thread structure. */
185 typedef struct thread_info_struct
187 struct thread_info_struct *next;
190 CORE_ADDR thread_local_base;
199 static thread_info thread_head;
201 /* The process and thread handles for the above context. */
203 static DEBUG_EVENT current_event; /* The current debug event from
205 static HANDLE current_process_handle; /* Currently executing process */
206 static thread_info *current_thread; /* Info on currently selected thread */
207 static DWORD main_thread_id; /* Thread ID of the main thread */
209 /* Counts of things. */
210 static int exception_count = 0;
211 static int event_count = 0;
212 static int saw_create;
213 static int open_process_used = 0;
216 static int new_console = 0;
218 static int cygwin_exceptions = 0;
220 static int new_group = 1;
221 static int debug_exec = 0; /* show execution */
222 static int debug_events = 0; /* show events from kernel */
223 static int debug_memory = 0; /* show target memory accesses */
224 static int debug_exceptions = 0; /* show target exceptions */
225 static int useshell = 0; /* use shell for subprocesses */
227 /* This vector maps GDB's idea of a register's number into an offset
228 in the windows exception context vector.
230 It also contains the bit mask needed to load the register in question.
232 The contents of this table can only be computed by the units
233 that provide CPU-specific support for Windows native debugging.
234 These units should set the table by calling
235 windows_set_context_register_offsets.
237 One day we could read a reg, we could inspect the context we
238 already have loaded, if it doesn't have the bit set that we need,
239 we read that set of registers in using GetThreadContext. If the
240 context already contains what we need, we just unpack it. Then to
241 write a register, first we have to ensure that the context contains
242 the other regs of the group, and then we copy the info in and set
245 static const int *mappings;
247 /* The function to use in order to determine whether a register is
248 a segment register or not. */
249 static segment_register_p_ftype *segment_register_p;
251 /* This vector maps the target's idea of an exception (extracted
252 from the DEBUG_EVENT structure) to GDB's idea. */
254 struct xlate_exception
260 static const struct xlate_exception
263 {EXCEPTION_ACCESS_VIOLATION, GDB_SIGNAL_SEGV},
264 {STATUS_STACK_OVERFLOW, GDB_SIGNAL_SEGV},
265 {EXCEPTION_BREAKPOINT, GDB_SIGNAL_TRAP},
266 {DBG_CONTROL_C, GDB_SIGNAL_INT},
267 {EXCEPTION_SINGLE_STEP, GDB_SIGNAL_TRAP},
268 {STATUS_FLOAT_DIVIDE_BY_ZERO, GDB_SIGNAL_FPE},
271 /* Set the MAPPINGS static global to OFFSETS.
272 See the description of MAPPINGS for more details. */
275 windows_set_context_register_offsets (const int *offsets)
280 /* See windows-nat.h. */
283 windows_set_segment_register_p (segment_register_p_ftype *fun)
285 segment_register_p = fun;
289 check (BOOL ok, const char *file, int line)
292 printf_filtered ("error return %s:%d was %u\n", file, line,
293 (unsigned) GetLastError ());
296 /* Find a thread record given a thread id. If GET_CONTEXT is not 0,
297 then also retrieve the context for this thread. If GET_CONTEXT is
298 negative, then don't suspend the thread. */
300 thread_rec (DWORD id, int get_context)
304 for (th = &thread_head; (th = th->next) != NULL;)
307 if (!th->suspended && get_context)
309 if (get_context > 0 && id != current_event.dwThreadId)
311 if (SuspendThread (th->h) == (DWORD) -1)
313 DWORD err = GetLastError ();
314 warning (_("SuspendThread failed. (winerr %u)"),
320 else if (get_context < 0)
322 th->reload_context = 1;
330 /* Add a thread to the thread list. */
332 windows_add_thread (ptid_t ptid, HANDLE h, void *tlb)
337 gdb_assert (ptid_get_tid (ptid) != 0);
339 id = ptid_get_tid (ptid);
341 if ((th = thread_rec (id, FALSE)))
344 th = XZALLOC (thread_info);
347 th->thread_local_base = (CORE_ADDR) (uintptr_t) tlb;
348 th->next = thread_head.next;
349 thread_head.next = th;
351 /* Set the debug registers for the new thread if they are used. */
352 if (debug_registers_used)
354 /* Only change the value of the debug registers. */
355 th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS;
356 CHECK (GetThreadContext (th->h, &th->context));
357 th->context.Dr0 = dr[0];
358 th->context.Dr1 = dr[1];
359 th->context.Dr2 = dr[2];
360 th->context.Dr3 = dr[3];
361 th->context.Dr6 = DR6_CLEAR_VALUE;
362 th->context.Dr7 = dr[7];
363 CHECK (SetThreadContext (th->h, &th->context));
364 th->context.ContextFlags = 0;
369 /* Clear out any old thread list and reintialize it to a
372 windows_init_thread_list (void)
374 thread_info *th = &thread_head;
376 DEBUG_EVENTS (("gdb: windows_init_thread_list\n"));
378 while (th->next != NULL)
380 thread_info *here = th->next;
381 th->next = here->next;
384 thread_head.next = NULL;
387 /* Delete a thread from the list of threads. */
389 windows_delete_thread (ptid_t ptid)
394 gdb_assert (ptid_get_tid (ptid) != 0);
396 id = ptid_get_tid (ptid);
399 printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (ptid));
400 delete_thread (ptid);
402 for (th = &thread_head;
403 th->next != NULL && th->next->id != id;
407 if (th->next != NULL)
409 thread_info *here = th->next;
410 th->next = here->next;
416 do_windows_fetch_inferior_registers (struct regcache *regcache, int r)
418 char *context_offset = ((char *) ¤t_thread->context) + mappings[r];
419 struct gdbarch *gdbarch = get_regcache_arch (regcache);
420 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
424 return; /* Windows sometimes uses a non-existent thread id in its
427 if (current_thread->reload_context)
429 #ifdef __COPY_CONTEXT_SIZE
430 if (have_saved_context)
432 /* Lie about where the program actually is stopped since
433 cygwin has informed us that we should consider the signal
434 to have occurred at another location which is stored in
436 memcpy (¤t_thread->context, &saved_context,
437 __COPY_CONTEXT_SIZE);
438 have_saved_context = 0;
443 thread_info *th = current_thread;
444 th->context.ContextFlags = CONTEXT_DEBUGGER_DR;
445 GetThreadContext (th->h, &th->context);
446 /* Copy dr values from that thread.
447 But only if there were not modified since last stop.
449 if (!debug_registers_changed)
451 dr[0] = th->context.Dr0;
452 dr[1] = th->context.Dr1;
453 dr[2] = th->context.Dr2;
454 dr[3] = th->context.Dr3;
455 dr[6] = th->context.Dr6;
456 dr[7] = th->context.Dr7;
459 current_thread->reload_context = 0;
462 if (r == I387_FISEG_REGNUM (tdep))
464 l = *((long *) context_offset) & 0xffff;
465 regcache_raw_supply (regcache, r, (char *) &l);
467 else if (r == I387_FOP_REGNUM (tdep))
469 l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1);
470 regcache_raw_supply (regcache, r, (char *) &l);
472 else if (segment_register_p (r))
474 /* GDB treats segment registers as 32bit registers, but they are
475 in fact only 16 bits long. Make sure we do not read extra
476 bits from our source buffer. */
477 l = *((long *) context_offset) & 0xffff;
478 regcache_raw_supply (regcache, r, (char *) &l);
481 regcache_raw_supply (regcache, r, context_offset);
484 for (r = 0; r < gdbarch_num_regs (gdbarch); r++)
485 do_windows_fetch_inferior_registers (regcache, r);
490 windows_fetch_inferior_registers (struct target_ops *ops,
491 struct regcache *regcache, int r)
493 current_thread = thread_rec (ptid_get_tid (inferior_ptid), TRUE);
494 /* Check if current_thread exists. Windows sometimes uses a non-existent
495 thread id in its events. */
497 do_windows_fetch_inferior_registers (regcache, r);
501 do_windows_store_inferior_registers (const struct regcache *regcache, int r)
504 /* Windows sometimes uses a non-existent thread id in its events. */;
506 regcache_raw_collect (regcache, r,
507 ((char *) ¤t_thread->context) + mappings[r]);
510 for (r = 0; r < gdbarch_num_regs (get_regcache_arch (regcache)); r++)
511 do_windows_store_inferior_registers (regcache, r);
515 /* Store a new register value into the current thread context. */
517 windows_store_inferior_registers (struct target_ops *ops,
518 struct regcache *regcache, int r)
520 current_thread = thread_rec (ptid_get_tid (inferior_ptid), TRUE);
521 /* Check if current_thread exists. Windows sometimes uses a non-existent
522 thread id in its events. */
524 do_windows_store_inferior_registers (regcache, r);
527 /* Get the name of a given module at given base address. If base_address
528 is zero return the first loaded module (which is always the name of the
531 get_module_name (LPVOID base_address, char *dll_name_ret)
537 HMODULE *DllHandle = dh_buf; /* Set to temporary storage for
541 cygwin_buf_t pathbuf[__PMAX]; /* Temporary storage prior to converting to
542 posix form. __PMAX is always enough
543 as long as SO_NAME_MAX_PATH_SIZE is defined
548 /* Find size of buffer needed to handle list of modules loaded in
550 if (!EnumProcessModules (current_process_handle, DllHandle,
551 sizeof (HMODULE), &cbNeeded) || !cbNeeded)
554 /* Allocate correct amount of space for module list. */
555 DllHandle = (HMODULE *) alloca (cbNeeded);
559 /* Get the list of modules. */
560 if (!EnumProcessModules (current_process_handle, DllHandle, cbNeeded,
564 for (i = 0; i < (int) (cbNeeded / sizeof (HMODULE)); i++)
566 /* Get information on this module. */
567 if (!GetModuleInformation (current_process_handle, DllHandle[i],
569 error (_("Can't get module info"));
571 if (!base_address || mi.lpBaseOfDll == base_address)
573 /* Try to find the name of the given module. */
575 /* Cygwin prefers that the path be in /x/y/z format. */
576 len = GetModuleFileNameEx (current_process_handle,
577 DllHandle[i], pathbuf, __PMAX);
579 error (_("Error getting dll name: %u."),
580 (unsigned) GetLastError ());
581 if (cygwin_conv_path (CCP_WIN_W_TO_POSIX, pathbuf, dll_name_ret,
583 error (_("Error converting dll name to POSIX: %d."), errno);
585 len = GetModuleFileNameEx (current_process_handle,
586 DllHandle[i], dll_name_ret, __PMAX);
588 error (_("Error getting dll name: %u."),
589 (unsigned) GetLastError ());
591 return 1; /* success */
596 dll_name_ret[0] = '\0';
597 return 0; /* failure */
600 /* Return an absolute file name of the running GDB, if possible, or
601 ARGV0 if not. The return value is in malloc'ed storage. */
603 windows_get_absolute_argv0 (const char *argv0)
605 char full_name[PATH_MAX];
607 if (GetModuleFileName (NULL, full_name, PATH_MAX))
608 return xstrdup (full_name);
609 return xstrdup (argv0);
612 /* Encapsulate the information required in a call to
613 symbol_file_add_args. */
614 struct safe_symbol_file_add_args
618 struct section_addr_info *addrs;
621 struct ui_file *err, *out;
625 /* Maintain a linked list of "so" information. */
631 static struct so_list solib_start, *solib_end;
633 /* Call symbol_file_add with stderr redirected. We don't care if there
636 safe_symbol_file_add_stub (void *argv)
638 #define p ((struct safe_symbol_file_add_args *) argv)
639 const int add_flags = ((p->from_tty ? SYMFILE_VERBOSE : 0)
640 | (p->mainline ? SYMFILE_MAINLINE : 0));
641 p->ret = symbol_file_add (p->name, add_flags, p->addrs, p->flags);
646 /* Restore gdb's stderr after calling symbol_file_add. */
648 safe_symbol_file_add_cleanup (void *p)
650 #define sp ((struct safe_symbol_file_add_args *)p)
651 gdb_flush (gdb_stderr);
652 gdb_flush (gdb_stdout);
653 ui_file_delete (gdb_stderr);
654 ui_file_delete (gdb_stdout);
655 gdb_stderr = sp->err;
656 gdb_stdout = sp->out;
660 /* symbol_file_add wrapper that prevents errors from being displayed. */
661 static struct objfile *
662 safe_symbol_file_add (char *name, int from_tty,
663 struct section_addr_info *addrs,
664 int mainline, int flags)
666 struct safe_symbol_file_add_args p;
667 struct cleanup *cleanup;
669 cleanup = make_cleanup (safe_symbol_file_add_cleanup, &p);
673 gdb_flush (gdb_stderr);
674 gdb_flush (gdb_stdout);
675 gdb_stderr = ui_file_new ();
676 gdb_stdout = ui_file_new ();
678 p.from_tty = from_tty;
680 p.mainline = mainline;
682 catch_errors (safe_symbol_file_add_stub, &p, "", RETURN_MASK_ERROR);
684 do_cleanups (cleanup);
688 static struct so_list *
689 windows_make_so (const char *name, LPVOID load_addr)
696 WIN32_FIND_DATA w32_fd;
697 HANDLE h = FindFirstFile(name, &w32_fd);
699 if (h == INVALID_HANDLE_VALUE)
705 if (GetCurrentDirectory (MAX_PATH + 1, cwd))
707 p = strrchr (buf, '\\');
710 SetCurrentDirectory (buf);
711 GetFullPathName (w32_fd.cFileName, MAX_PATH, buf, &p);
712 SetCurrentDirectory (cwd);
715 if (strcasecmp (buf, "ntdll.dll") == 0)
717 GetSystemDirectory (buf, sizeof (buf));
718 strcat (buf, "\\ntdll.dll");
721 cygwin_buf_t buf[__PMAX];
724 if (access (name, F_OK) != 0)
726 if (strcasecmp (name, "ntdll.dll") == 0)
729 GetSystemDirectoryW (buf, sizeof (buf) / sizeof (wchar_t));
730 wcscat (buf, L"\\ntdll.dll");
734 GetSystemDirectoryA (buf, sizeof (buf) / sizeof (wchar_t));
735 strcat (buf, "\\ntdll.dll");
740 so = XZALLOC (struct so_list);
741 so->lm_info = (struct lm_info *) xmalloc (sizeof (struct lm_info));
742 so->lm_info->load_addr = load_addr;
743 strcpy (so->so_original_name, name);
745 strcpy (so->so_name, buf);
748 cygwin_conv_path (CCP_WIN_W_TO_POSIX, buf, so->so_name,
749 SO_NAME_MAX_PATH_SIZE);
752 char *rname = realpath (name, NULL);
753 if (rname && strlen (rname) < SO_NAME_MAX_PATH_SIZE)
755 strcpy (so->so_name, rname);
759 error (_("dll path too long"));
761 /* Record cygwin1.dll .text start/end. */
762 p = strchr (so->so_name, '\0') - (sizeof ("/cygwin1.dll") - 1);
763 if (p >= so->so_name && strcasecmp (p, "/cygwin1.dll") == 0)
766 asection *text = NULL;
769 abfd = gdb_bfd_open (so->so_name, "pei-i386", -1);
774 if (bfd_check_format (abfd, bfd_object))
775 text = bfd_get_section_by_name (abfd, ".text");
779 gdb_bfd_unref (abfd);
783 /* The symbols in a dll are offset by 0x1000, which is the
784 offset from 0 of the first byte in an image - because of the
785 file header and the section alignment. */
786 cygwin_load_start = (CORE_ADDR) (uintptr_t) ((char *)
788 cygwin_load_end = cygwin_load_start + bfd_section_size (abfd, text);
790 gdb_bfd_unref (abfd);
798 get_image_name (HANDLE h, void *address, int unicode)
801 static char buf[__PMAX];
803 static char buf[(2 * __PMAX) + 1];
805 DWORD size = unicode ? sizeof (WCHAR) : sizeof (char);
811 /* Attempt to read the name of the dll that was detected.
812 This is documented to work only when actively debugging
813 a program. It will not work for attached processes. */
817 /* See if we could read the address of a string, and that the
818 address isn't null. */
819 if (!ReadProcessMemory (h, address, &address_ptr,
820 sizeof (address_ptr), &done)
821 || done != sizeof (address_ptr) || !address_ptr)
824 /* Find the length of the string. */
825 while (ReadProcessMemory (h, address_ptr + len++ * size, &b, size, &done)
826 && (b[0] != 0 || b[size - 1] != 0) && done == size)
830 ReadProcessMemory (h, address_ptr, buf, len, &done);
833 WCHAR *unicode_address = (WCHAR *) alloca (len * sizeof (WCHAR));
834 ReadProcessMemory (h, address_ptr, unicode_address, len * sizeof (WCHAR),
837 wcstombs (buf, unicode_address, __PMAX);
839 WideCharToMultiByte (CP_ACP, 0, unicode_address, len, buf, sizeof buf,
847 /* Wait for child to do something. Return pid of child, or -1 in case
848 of error; store status through argument pointer OURSTATUS. */
850 handle_load_dll (void *dummy)
852 LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll;
853 char dll_buf[__PMAX];
854 char *dll_name = NULL;
856 dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0';
858 if (!get_module_name (event->lpBaseOfDll, dll_buf))
859 dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0';
863 if (*dll_name == '\0')
864 dll_name = get_image_name (current_process_handle,
865 event->lpImageName, event->fUnicode);
869 solib_end->next = windows_make_so (dll_name, event->lpBaseOfDll);
870 solib_end = solib_end->next;
872 DEBUG_EVENTS (("gdb: Loading dll \"%s\" at %s.\n", solib_end->so_name,
873 host_address_to_string (solib_end->lm_info->load_addr)));
879 windows_free_so (struct so_list *so)
887 handle_unload_dll (void *dummy)
889 LPVOID lpBaseOfDll = current_event.u.UnloadDll.lpBaseOfDll;
892 for (so = &solib_start; so->next != NULL; so = so->next)
893 if (so->next->lm_info->load_addr == lpBaseOfDll)
895 struct so_list *sodel = so->next;
896 so->next = sodel->next;
899 DEBUG_EVENTS (("gdb: Unloading dll \"%s\".\n", sodel->so_name));
901 windows_free_so (sodel);
902 solib_add (NULL, 0, NULL, auto_solib_add);
906 /* We did not find any DLL that was previously loaded at this address,
907 so register a complaint. We do not report an error, because we have
908 observed that this may be happening under some circumstances. For
909 instance, running 32bit applications on x64 Windows causes us to receive
910 4 mysterious UNLOAD_DLL_DEBUG_EVENTs during the startup phase (these
911 events are apparently caused by the WOW layer, the interface between
912 32bit and 64bit worlds). */
913 complaint (&symfile_complaints, _("dll starting at %s not found."),
914 host_address_to_string (lpBaseOfDll));
919 /* Clear list of loaded DLLs. */
921 windows_clear_solib (void)
923 solib_start.next = NULL;
924 solib_end = &solib_start;
927 /* Load DLL symbol info. */
929 dll_symbol_command (char *args, int from_tty)
935 error (_("dll-symbols requires a file name"));
938 if (n > 4 && strcasecmp (args + n - 4, ".dll") != 0)
940 char *newargs = (char *) alloca (n + 4 + 1);
941 strcpy (newargs, args);
942 strcat (newargs, ".dll");
946 safe_symbol_file_add (args, from_tty, NULL, 0, OBJF_SHARED | OBJF_USERLOADED);
949 /* Handle DEBUG_STRING output from child process.
950 Cygwin prepends its messages with a "cygwin:". Interpret this as
951 a Cygwin signal. Otherwise just print the string as a warning. */
953 handle_output_debug_string (struct target_waitstatus *ourstatus)
958 if (!target_read_string
959 ((CORE_ADDR) (uintptr_t) current_event.u.DebugString.lpDebugStringData,
963 else if (strncmp (s, _CYGWIN_SIGNAL_STRING,
964 sizeof (_CYGWIN_SIGNAL_STRING) - 1) != 0)
967 if (strncmp (s, "cYg", 3) != 0)
971 #ifdef __COPY_CONTEXT_SIZE
974 /* Got a cygwin signal marker. A cygwin signal is followed by
975 the signal number itself and then optionally followed by the
976 thread id and address to saved context within the DLL. If
977 these are supplied, then the given thread is assumed to have
978 issued the signal and the context from the thread is assumed
979 to be stored at the given address in the inferior. Tell gdb
980 to treat this like a real signal. */
982 int sig = strtol (s + sizeof (_CYGWIN_SIGNAL_STRING) - 1, &p, 0);
983 int gotasig = gdb_signal_from_host (sig);
984 ourstatus->value.sig = gotasig;
989 ourstatus->kind = TARGET_WAITKIND_STOPPED;
990 retval = strtoul (p, &p, 0);
992 retval = main_thread_id;
993 else if ((x = (LPCVOID) strtoull (p, NULL, 0))
994 && ReadProcessMemory (current_process_handle, x,
996 __COPY_CONTEXT_SIZE, &n)
997 && n == __COPY_CONTEXT_SIZE)
998 have_saved_context = 1;
999 current_event.dwThreadId = retval;
1010 display_selector (HANDLE thread, DWORD sel)
1013 if (GetThreadSelectorEntry (thread, sel, &info))
1016 printf_filtered ("0x%03x: ", (unsigned) sel);
1017 if (!info.HighWord.Bits.Pres)
1019 puts_filtered ("Segment not present\n");
1022 base = (info.HighWord.Bits.BaseHi << 24) +
1023 (info.HighWord.Bits.BaseMid << 16)
1025 limit = (info.HighWord.Bits.LimitHi << 16) + info.LimitLow;
1026 if (info.HighWord.Bits.Granularity)
1027 limit = (limit << 12) | 0xfff;
1028 printf_filtered ("base=0x%08x limit=0x%08x", base, limit);
1029 if (info.HighWord.Bits.Default_Big)
1030 puts_filtered(" 32-bit ");
1032 puts_filtered(" 16-bit ");
1033 switch ((info.HighWord.Bits.Type & 0xf) >> 1)
1036 puts_filtered ("Data (Read-Only, Exp-up");
1039 puts_filtered ("Data (Read/Write, Exp-up");
1042 puts_filtered ("Unused segment (");
1045 puts_filtered ("Data (Read/Write, Exp-down");
1048 puts_filtered ("Code (Exec-Only, N.Conf");
1051 puts_filtered ("Code (Exec/Read, N.Conf");
1054 puts_filtered ("Code (Exec-Only, Conf");
1057 puts_filtered ("Code (Exec/Read, Conf");
1060 printf_filtered ("Unknown type 0x%x",info.HighWord.Bits.Type);
1062 if ((info.HighWord.Bits.Type & 0x1) == 0)
1063 puts_filtered(", N.Acc");
1064 puts_filtered (")\n");
1065 if ((info.HighWord.Bits.Type & 0x10) == 0)
1066 puts_filtered("System selector ");
1067 printf_filtered ("Priviledge level = %d. ", info.HighWord.Bits.Dpl);
1068 if (info.HighWord.Bits.Granularity)
1069 puts_filtered ("Page granular.\n");
1071 puts_filtered ("Byte granular.\n");
1076 DWORD err = GetLastError ();
1077 if (err == ERROR_NOT_SUPPORTED)
1078 printf_filtered ("Function not supported\n");
1080 printf_filtered ("Invalid selector 0x%x.\n", (unsigned) sel);
1086 display_selectors (char * args, int from_tty)
1088 if (!current_thread)
1090 puts_filtered ("Impossible to display selectors now.\n");
1096 puts_filtered ("Selector $cs\n");
1097 display_selector (current_thread->h,
1098 current_thread->context.SegCs);
1099 puts_filtered ("Selector $ds\n");
1100 display_selector (current_thread->h,
1101 current_thread->context.SegDs);
1102 puts_filtered ("Selector $es\n");
1103 display_selector (current_thread->h,
1104 current_thread->context.SegEs);
1105 puts_filtered ("Selector $ss\n");
1106 display_selector (current_thread->h,
1107 current_thread->context.SegSs);
1108 puts_filtered ("Selector $fs\n");
1109 display_selector (current_thread->h,
1110 current_thread->context.SegFs);
1111 puts_filtered ("Selector $gs\n");
1112 display_selector (current_thread->h,
1113 current_thread->context.SegGs);
1118 sel = parse_and_eval_long (args);
1119 printf_filtered ("Selector \"%s\"\n",args);
1120 display_selector (current_thread->h, sel);
1124 #define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \
1125 printf_unfiltered ("gdb: Target exception %s at %s\n", x, \
1126 host_address_to_string (\
1127 current_event.u.Exception.ExceptionRecord.ExceptionAddress))
1130 handle_exception (struct target_waitstatus *ourstatus)
1133 DWORD code = current_event.u.Exception.ExceptionRecord.ExceptionCode;
1135 ourstatus->kind = TARGET_WAITKIND_STOPPED;
1137 /* Record the context of the current thread. */
1138 th = thread_rec (current_event.dwThreadId, -1);
1142 case EXCEPTION_ACCESS_VIOLATION:
1143 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ACCESS_VIOLATION");
1144 ourstatus->value.sig = GDB_SIGNAL_SEGV;
1147 /* See if the access violation happened within the cygwin DLL
1148 itself. Cygwin uses a kind of exception handling to deal
1149 with passed-in invalid addresses. gdb should not treat
1150 these as real SEGVs since they will be silently handled by
1151 cygwin. A real SEGV will (theoretically) be caught by
1152 cygwin later in the process and will be sent as a
1153 cygwin-specific-signal. So, ignore SEGVs if they show up
1154 within the text segment of the DLL itself. */
1156 CORE_ADDR addr = (CORE_ADDR) (uintptr_t)
1157 current_event.u.Exception.ExceptionRecord.ExceptionAddress;
1159 if ((!cygwin_exceptions && (addr >= cygwin_load_start
1160 && addr < cygwin_load_end))
1161 || (find_pc_partial_function (addr, &fn, NULL, NULL)
1162 && strncmp (fn, "KERNEL32!IsBad",
1163 strlen ("KERNEL32!IsBad")) == 0))
1168 case STATUS_STACK_OVERFLOW:
1169 DEBUG_EXCEPTION_SIMPLE ("STATUS_STACK_OVERFLOW");
1170 ourstatus->value.sig = GDB_SIGNAL_SEGV;
1172 case STATUS_FLOAT_DENORMAL_OPERAND:
1173 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DENORMAL_OPERAND");
1174 ourstatus->value.sig = GDB_SIGNAL_FPE;
1176 case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
1177 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ARRAY_BOUNDS_EXCEEDED");
1178 ourstatus->value.sig = GDB_SIGNAL_FPE;
1180 case STATUS_FLOAT_INEXACT_RESULT:
1181 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INEXACT_RESULT");
1182 ourstatus->value.sig = GDB_SIGNAL_FPE;
1184 case STATUS_FLOAT_INVALID_OPERATION:
1185 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INVALID_OPERATION");
1186 ourstatus->value.sig = GDB_SIGNAL_FPE;
1188 case STATUS_FLOAT_OVERFLOW:
1189 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_OVERFLOW");
1190 ourstatus->value.sig = GDB_SIGNAL_FPE;
1192 case STATUS_FLOAT_STACK_CHECK:
1193 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_STACK_CHECK");
1194 ourstatus->value.sig = GDB_SIGNAL_FPE;
1196 case STATUS_FLOAT_UNDERFLOW:
1197 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_UNDERFLOW");
1198 ourstatus->value.sig = GDB_SIGNAL_FPE;
1200 case STATUS_FLOAT_DIVIDE_BY_ZERO:
1201 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DIVIDE_BY_ZERO");
1202 ourstatus->value.sig = GDB_SIGNAL_FPE;
1204 case STATUS_INTEGER_DIVIDE_BY_ZERO:
1205 DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_DIVIDE_BY_ZERO");
1206 ourstatus->value.sig = GDB_SIGNAL_FPE;
1208 case STATUS_INTEGER_OVERFLOW:
1209 DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_OVERFLOW");
1210 ourstatus->value.sig = GDB_SIGNAL_FPE;
1212 case EXCEPTION_BREAKPOINT:
1213 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT");
1214 ourstatus->value.sig = GDB_SIGNAL_TRAP;
1217 DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_C");
1218 ourstatus->value.sig = GDB_SIGNAL_INT;
1220 case DBG_CONTROL_BREAK:
1221 DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_BREAK");
1222 ourstatus->value.sig = GDB_SIGNAL_INT;
1224 case EXCEPTION_SINGLE_STEP:
1225 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_SINGLE_STEP");
1226 ourstatus->value.sig = GDB_SIGNAL_TRAP;
1228 case EXCEPTION_ILLEGAL_INSTRUCTION:
1229 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ILLEGAL_INSTRUCTION");
1230 ourstatus->value.sig = GDB_SIGNAL_ILL;
1232 case EXCEPTION_PRIV_INSTRUCTION:
1233 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_PRIV_INSTRUCTION");
1234 ourstatus->value.sig = GDB_SIGNAL_ILL;
1236 case EXCEPTION_NONCONTINUABLE_EXCEPTION:
1237 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_NONCONTINUABLE_EXCEPTION");
1238 ourstatus->value.sig = GDB_SIGNAL_ILL;
1241 /* Treat unhandled first chance exceptions specially. */
1242 if (current_event.u.Exception.dwFirstChance)
1244 printf_unfiltered ("gdb: unknown target exception 0x%08x at %s\n",
1245 (unsigned) current_event.u.Exception.ExceptionRecord.ExceptionCode,
1246 host_address_to_string (
1247 current_event.u.Exception.ExceptionRecord.ExceptionAddress));
1248 ourstatus->value.sig = GDB_SIGNAL_UNKNOWN;
1252 last_sig = ourstatus->value.sig;
1256 /* Resume all artificially suspended threads if we are continuing
1259 windows_continue (DWORD continue_status, int id)
1265 DEBUG_EVENTS (("ContinueDebugEvent (cpid=%d, ctid=%x, %s);\n",
1266 (unsigned) current_event.dwProcessId,
1267 (unsigned) current_event.dwThreadId,
1268 continue_status == DBG_CONTINUE ?
1269 "DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED"));
1271 for (th = &thread_head; (th = th->next) != NULL;)
1272 if ((id == -1 || id == (int) th->id)
1275 if (debug_registers_changed)
1277 th->context.ContextFlags |= CONTEXT_DEBUG_REGISTERS;
1278 th->context.Dr0 = dr[0];
1279 th->context.Dr1 = dr[1];
1280 th->context.Dr2 = dr[2];
1281 th->context.Dr3 = dr[3];
1282 th->context.Dr6 = DR6_CLEAR_VALUE;
1283 th->context.Dr7 = dr[7];
1285 if (th->context.ContextFlags)
1287 CHECK (SetThreadContext (th->h, &th->context));
1288 th->context.ContextFlags = 0;
1290 if (th->suspended > 0)
1291 (void) ResumeThread (th->h);
1295 res = ContinueDebugEvent (current_event.dwProcessId,
1296 current_event.dwThreadId,
1299 debug_registers_changed = 0;
1303 /* Called in pathological case where Windows fails to send a
1304 CREATE_PROCESS_DEBUG_EVENT after an attach. */
1306 fake_create_process (void)
1308 current_process_handle = OpenProcess (PROCESS_ALL_ACCESS, FALSE,
1309 current_event.dwProcessId);
1310 if (current_process_handle != NULL)
1311 open_process_used = 1;
1314 error (_("OpenProcess call failed, GetLastError = %u"),
1315 (unsigned) GetLastError ());
1316 /* We can not debug anything in that case. */
1318 main_thread_id = current_event.dwThreadId;
1319 current_thread = windows_add_thread (
1320 ptid_build (current_event.dwProcessId, 0,
1321 current_event.dwThreadId),
1322 current_event.u.CreateThread.hThread,
1323 current_event.u.CreateThread.lpThreadLocalBase);
1324 return main_thread_id;
1328 windows_resume (struct target_ops *ops,
1329 ptid_t ptid, int step, enum gdb_signal sig)
1332 DWORD continue_status = DBG_CONTINUE;
1334 /* A specific PTID means `step only this thread id'. */
1335 int resume_all = ptid_equal (ptid, minus_one_ptid);
1337 /* If we're continuing all threads, it's the current inferior that
1338 should be handled specially. */
1340 ptid = inferior_ptid;
1342 if (sig != GDB_SIGNAL_0)
1344 if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT)
1346 DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig));
1348 else if (sig == last_sig)
1349 continue_status = DBG_EXCEPTION_NOT_HANDLED;
1352 /* This code does not seem to work, because
1353 the kernel does probably not consider changes in the ExceptionRecord
1354 structure when passing the exception to the inferior.
1355 Note that this seems possible in the exception handler itself. */
1358 for (i = 0; xlate[i].them != -1; i++)
1359 if (xlate[i].us == sig)
1361 current_event.u.Exception.ExceptionRecord.ExceptionCode
1363 continue_status = DBG_EXCEPTION_NOT_HANDLED;
1366 if (continue_status == DBG_CONTINUE)
1368 DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig));
1372 DEBUG_EXCEPT(("Can only continue with recieved signal %d.\n",
1376 last_sig = GDB_SIGNAL_0;
1378 DEBUG_EXEC (("gdb: windows_resume (pid=%d, tid=%ld, step=%d, sig=%d);\n",
1379 ptid_get_pid (ptid), ptid_get_tid (ptid), step, sig));
1381 /* Get context for currently selected thread. */
1382 th = thread_rec (ptid_get_tid (inferior_ptid), FALSE);
1387 /* Single step by setting t bit. */
1388 struct regcache *regcache = get_current_regcache ();
1389 struct gdbarch *gdbarch = get_regcache_arch (regcache);
1390 windows_fetch_inferior_registers (ops, regcache,
1391 gdbarch_ps_regnum (gdbarch));
1392 th->context.EFlags |= FLAG_TRACE_BIT;
1395 if (th->context.ContextFlags)
1397 if (debug_registers_changed)
1399 th->context.Dr0 = dr[0];
1400 th->context.Dr1 = dr[1];
1401 th->context.Dr2 = dr[2];
1402 th->context.Dr3 = dr[3];
1403 th->context.Dr6 = DR6_CLEAR_VALUE;
1404 th->context.Dr7 = dr[7];
1406 CHECK (SetThreadContext (th->h, &th->context));
1407 th->context.ContextFlags = 0;
1411 /* Allow continuing with the same signal that interrupted us.
1412 Otherwise complain. */
1415 windows_continue (continue_status, -1);
1417 windows_continue (continue_status, ptid_get_tid (ptid));
1420 /* Ctrl-C handler used when the inferior is not run in the same console. The
1421 handler is in charge of interrupting the inferior using DebugBreakProcess.
1422 Note that this function is not available prior to Windows XP. In this case
1423 we emit a warning. */
1425 ctrl_c_handler (DWORD event_type)
1427 const int attach_flag = current_inferior ()->attach_flag;
1429 /* Only handle Ctrl-C and Ctrl-Break events. Ignore others. */
1430 if (event_type != CTRL_C_EVENT && event_type != CTRL_BREAK_EVENT)
1433 /* If the inferior and the debugger share the same console, do nothing as
1434 the inferior has also received the Ctrl-C event. */
1435 if (!new_console && !attach_flag)
1438 if (!DebugBreakProcess (current_process_handle))
1439 warning (_("Could not interrupt program. "
1440 "Press Ctrl-c in the program console."));
1442 /* Return true to tell that Ctrl-C has been handled. */
1446 /* Get the next event from the child. Return 1 if the event requires
1447 handling by WFI (or whatever). */
1449 get_windows_debug_event (struct target_ops *ops,
1450 int pid, struct target_waitstatus *ourstatus)
1453 DWORD continue_status, event_code;
1455 static thread_info dummy_thread_info;
1458 last_sig = GDB_SIGNAL_0;
1460 if (!(debug_event = WaitForDebugEvent (¤t_event, 1000)))
1464 continue_status = DBG_CONTINUE;
1466 event_code = current_event.dwDebugEventCode;
1467 ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
1469 have_saved_context = 0;
1473 case CREATE_THREAD_DEBUG_EVENT:
1474 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=%x code=%s)\n",
1475 (unsigned) current_event.dwProcessId,
1476 (unsigned) current_event.dwThreadId,
1477 "CREATE_THREAD_DEBUG_EVENT"));
1478 if (saw_create != 1)
1480 struct inferior *inf;
1481 inf = find_inferior_pid (current_event.dwProcessId);
1482 if (!saw_create && inf->attach_flag)
1484 /* Kludge around a Windows bug where first event is a create
1485 thread event. Caused when attached process does not have
1487 retval = fake_create_process ();
1493 /* Record the existence of this thread. */
1494 retval = current_event.dwThreadId;
1495 th = windows_add_thread (ptid_build (current_event.dwProcessId, 0,
1496 current_event.dwThreadId),
1497 current_event.u.CreateThread.hThread,
1498 current_event.u.CreateThread.lpThreadLocalBase);
1502 case EXIT_THREAD_DEBUG_EVENT:
1503 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=%x code=%s)\n",
1504 (unsigned) current_event.dwProcessId,
1505 (unsigned) current_event.dwThreadId,
1506 "EXIT_THREAD_DEBUG_EVENT"));
1508 if (current_event.dwThreadId != main_thread_id)
1510 windows_delete_thread (ptid_build (current_event.dwProcessId, 0,
1511 current_event.dwThreadId));
1512 th = &dummy_thread_info;
1516 case CREATE_PROCESS_DEBUG_EVENT:
1517 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=%x code=%s)\n",
1518 (unsigned) current_event.dwProcessId,
1519 (unsigned) current_event.dwThreadId,
1520 "CREATE_PROCESS_DEBUG_EVENT"));
1521 CloseHandle (current_event.u.CreateProcessInfo.hFile);
1522 if (++saw_create != 1)
1525 current_process_handle = current_event.u.CreateProcessInfo.hProcess;
1527 windows_delete_thread (ptid_build (current_event.dwProcessId, 0,
1529 main_thread_id = current_event.dwThreadId;
1530 /* Add the main thread. */
1531 th = windows_add_thread (ptid_build (current_event.dwProcessId, 0,
1532 current_event.dwThreadId),
1533 current_event.u.CreateProcessInfo.hThread,
1534 current_event.u.CreateProcessInfo.lpThreadLocalBase);
1535 retval = current_event.dwThreadId;
1538 case EXIT_PROCESS_DEBUG_EVENT:
1539 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=%x code=%s)\n",
1540 (unsigned) current_event.dwProcessId,
1541 (unsigned) current_event.dwThreadId,
1542 "EXIT_PROCESS_DEBUG_EVENT"));
1543 if (!windows_initialization_done)
1545 target_terminal_ours ();
1546 target_mourn_inferior ();
1547 error (_("During startup program exited with code 0x%x."),
1548 (unsigned int) current_event.u.ExitProcess.dwExitCode);
1550 else if (saw_create == 1)
1552 ourstatus->kind = TARGET_WAITKIND_EXITED;
1553 ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode;
1554 retval = main_thread_id;
1558 case LOAD_DLL_DEBUG_EVENT:
1559 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=%x code=%s)\n",
1560 (unsigned) current_event.dwProcessId,
1561 (unsigned) current_event.dwThreadId,
1562 "LOAD_DLL_DEBUG_EVENT"));
1563 CloseHandle (current_event.u.LoadDll.hFile);
1564 if (saw_create != 1)
1566 catch_errors (handle_load_dll, NULL, (char *) "", RETURN_MASK_ALL);
1567 ourstatus->kind = TARGET_WAITKIND_LOADED;
1568 ourstatus->value.integer = 0;
1569 retval = main_thread_id;
1572 case UNLOAD_DLL_DEBUG_EVENT:
1573 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=%x code=%s)\n",
1574 (unsigned) current_event.dwProcessId,
1575 (unsigned) current_event.dwThreadId,
1576 "UNLOAD_DLL_DEBUG_EVENT"));
1577 if (saw_create != 1)
1579 catch_errors (handle_unload_dll, NULL, (char *) "", RETURN_MASK_ALL);
1580 ourstatus->kind = TARGET_WAITKIND_LOADED;
1581 ourstatus->value.integer = 0;
1582 retval = main_thread_id;
1585 case EXCEPTION_DEBUG_EVENT:
1586 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=%x code=%s)\n",
1587 (unsigned) current_event.dwProcessId,
1588 (unsigned) current_event.dwThreadId,
1589 "EXCEPTION_DEBUG_EVENT"));
1590 if (saw_create != 1)
1592 switch (handle_exception (ourstatus))
1595 continue_status = DBG_EXCEPTION_NOT_HANDLED;
1598 retval = current_event.dwThreadId;
1602 continue_status = -1;
1607 case OUTPUT_DEBUG_STRING_EVENT: /* Message from the kernel. */
1608 DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=%x code=%s)\n",
1609 (unsigned) current_event.dwProcessId,
1610 (unsigned) current_event.dwThreadId,
1611 "OUTPUT_DEBUG_STRING_EVENT"));
1612 if (saw_create != 1)
1614 retval = handle_output_debug_string (ourstatus);
1618 if (saw_create != 1)
1620 printf_unfiltered ("gdb: kernel event for pid=%u tid=%x\n",
1621 (unsigned) current_event.dwProcessId,
1622 (unsigned) current_event.dwThreadId);
1623 printf_unfiltered (" unknown event code %u\n",
1624 (unsigned) current_event.dwDebugEventCode);
1628 if (!retval || saw_create != 1)
1630 if (continue_status == -1)
1631 windows_resume (ops, minus_one_ptid, 0, 1);
1633 CHECK (windows_continue (continue_status, -1));
1637 inferior_ptid = ptid_build (current_event.dwProcessId, 0,
1639 current_thread = th ?: thread_rec (current_event.dwThreadId, TRUE);
1646 /* Wait for interesting events to occur in the target process. */
1648 windows_wait (struct target_ops *ops,
1649 ptid_t ptid, struct target_waitstatus *ourstatus, int options)
1653 target_terminal_ours ();
1655 /* We loop when we get a non-standard exception rather than return
1656 with a SPURIOUS because resume can try and step or modify things,
1657 which needs a current_thread->h. But some of these exceptions mark
1658 the birth or death of threads, which mean that the current thread
1659 isn't necessarily what you think it is. */
1665 /* If the user presses Ctrl-c while the debugger is waiting
1666 for an event, he expects the debugger to interrupt his program
1667 and to get the prompt back. There are two possible situations:
1669 - The debugger and the program do not share the console, in
1670 which case the Ctrl-c event only reached the debugger.
1671 In that case, the ctrl_c handler will take care of interrupting
1672 the inferior. Note that this case is working starting with
1673 Windows XP. For Windows 2000, Ctrl-C should be pressed in the
1676 - The debugger and the program share the same console, in which
1677 case both debugger and inferior will receive the Ctrl-c event.
1678 In that case the ctrl_c handler will ignore the event, as the
1679 Ctrl-c event generated inside the inferior will trigger the
1680 expected debug event.
1682 FIXME: brobecker/2008-05-20: If the inferior receives the
1683 signal first and the delay until GDB receives that signal
1684 is sufficiently long, GDB can sometimes receive the SIGINT
1685 after we have unblocked the CTRL+C handler. This would
1686 lead to the debugger stopping prematurely while handling
1687 the new-thread event that comes with the handling of the SIGINT
1688 inside the inferior, and then stop again immediately when
1689 the user tries to resume the execution in the inferior.
1690 This is a classic race that we should try to fix one day. */
1691 SetConsoleCtrlHandler (&ctrl_c_handler, TRUE);
1692 retval = get_windows_debug_event (ops, pid, ourstatus);
1693 SetConsoleCtrlHandler (&ctrl_c_handler, FALSE);
1696 return ptid_build (current_event.dwProcessId, 0, retval);
1701 if (deprecated_ui_loop_hook != NULL)
1702 detach = deprecated_ui_loop_hook (0);
1705 windows_kill_inferior (ops);
1711 do_initial_windows_stuff (struct target_ops *ops, DWORD pid, int attaching)
1713 extern int stop_after_trap;
1715 struct inferior *inf;
1716 struct thread_info *tp;
1718 last_sig = GDB_SIGNAL_0;
1720 exception_count = 0;
1721 open_process_used = 0;
1722 debug_registers_changed = 0;
1723 debug_registers_used = 0;
1724 for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++)
1727 cygwin_load_start = cygwin_load_end = 0;
1729 current_event.dwProcessId = pid;
1730 memset (¤t_event, 0, sizeof (current_event));
1732 disable_breakpoints_in_shlibs ();
1733 windows_clear_solib ();
1734 clear_proceed_status ();
1735 init_wait_for_inferior ();
1737 inf = current_inferior ();
1738 inferior_appeared (inf, pid);
1739 inf->attach_flag = attaching;
1741 /* Make the new process the current inferior, so terminal handling
1742 can rely on it. When attaching, we don't know about any thread
1743 id here, but that's OK --- nothing should be referencing the
1744 current thread until we report an event out of windows_wait. */
1745 inferior_ptid = pid_to_ptid (pid);
1747 terminal_init_inferior_with_pgrp (pid);
1748 target_terminal_inferior ();
1750 windows_initialization_done = 0;
1751 inf->control.stop_soon = STOP_QUIETLY;
1754 stop_after_trap = 1;
1755 wait_for_inferior ();
1756 tp = inferior_thread ();
1757 if (tp->suspend.stop_signal != GDB_SIGNAL_TRAP)
1758 resume (0, tp->suspend.stop_signal);
1763 windows_initialization_done = 1;
1764 inf->control.stop_soon = NO_STOP_QUIETLY;
1765 stop_after_trap = 0;
1769 /* Try to set or remove a user privilege to the current process. Return -1
1770 if that fails, the previous setting of that privilege otherwise.
1772 This code is copied from the Cygwin source code and rearranged to allow
1773 dynamically loading of the needed symbols from advapi32 which is only
1774 available on NT/2K/XP. */
1776 set_process_privilege (const char *privilege, BOOL enable)
1778 HANDLE token_hdl = NULL;
1780 TOKEN_PRIVILEGES new_priv, orig_priv;
1784 if (!OpenProcessToken (GetCurrentProcess (),
1785 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
1789 if (!LookupPrivilegeValueA (NULL, privilege, &restore_priv))
1792 new_priv.PrivilegeCount = 1;
1793 new_priv.Privileges[0].Luid = restore_priv;
1794 new_priv.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED : 0;
1796 if (!AdjustTokenPrivileges (token_hdl, FALSE, &new_priv,
1797 sizeof orig_priv, &orig_priv, &size))
1800 /* Disabled, otherwise every `attach' in an unprivileged user session
1801 would raise the "Failed to get SE_DEBUG_NAME privilege" warning in
1802 windows_attach(). */
1803 /* AdjustTokenPrivileges returns TRUE even if the privilege could not
1804 be enabled. GetLastError () returns an correct error code, though. */
1805 if (enable && GetLastError () == ERROR_NOT_ALL_ASSIGNED)
1809 ret = orig_priv.Privileges[0].Attributes == SE_PRIVILEGE_ENABLED ? 1 : 0;
1813 CloseHandle (token_hdl);
1818 /* Attach to process PID, then initialize for debugging it. */
1820 windows_attach (struct target_ops *ops, char *args, int from_tty)
1825 pid = parse_pid_to_attach (args);
1827 if (set_process_privilege (SE_DEBUG_NAME, TRUE) < 0)
1829 printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n");
1830 printf_unfiltered ("This can cause attach to "
1831 "fail on Windows NT/2K/XP\n");
1834 windows_init_thread_list ();
1835 ok = DebugActiveProcess (pid);
1841 /* Try fall back to Cygwin pid. */
1842 pid = cygwin_internal (CW_CYGWIN_PID_TO_WINPID, pid);
1845 ok = DebugActiveProcess (pid);
1850 error (_("Can't attach to process."));
1852 DebugSetProcessKillOnExit (FALSE);
1856 char *exec_file = (char *) get_exec_file (0);
1859 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file,
1860 target_pid_to_str (pid_to_ptid (pid)));
1862 printf_unfiltered ("Attaching to %s\n",
1863 target_pid_to_str (pid_to_ptid (pid)));
1865 gdb_flush (gdb_stdout);
1868 do_initial_windows_stuff (ops, pid, 1);
1869 target_terminal_ours ();
1873 windows_detach (struct target_ops *ops, char *args, int from_tty)
1878 windows_resume (ops, ptid, 0, GDB_SIGNAL_0);
1880 if (!DebugActiveProcessStop (current_event.dwProcessId))
1882 error (_("Can't detach process %u (error %u)"),
1883 (unsigned) current_event.dwProcessId, (unsigned) GetLastError ());
1886 DebugSetProcessKillOnExit (FALSE);
1888 if (detached && from_tty)
1890 char *exec_file = get_exec_file (0);
1893 printf_unfiltered ("Detaching from program: %s, Pid %u\n", exec_file,
1894 (unsigned) current_event.dwProcessId);
1895 gdb_flush (gdb_stdout);
1898 i386_cleanup_dregs ();
1899 inferior_ptid = null_ptid;
1900 detach_inferior (current_event.dwProcessId);
1902 unpush_target (ops);
1906 windows_pid_to_exec_file (int pid)
1908 static char path[__PMAX];
1910 /* Try to find exe name as symlink target of /proc/<pid>/exe. */
1912 char procexe[sizeof ("/proc/4294967295/exe")];
1914 xsnprintf (procexe, sizeof (procexe), "/proc/%u/exe", pid);
1915 nchars = readlink (procexe, path, sizeof(path));
1916 if (nchars > 0 && nchars < sizeof (path))
1918 path[nchars] = '\0'; /* Got it */
1923 /* If we get here then either Cygwin is hosed, this isn't a Cygwin version
1924 of gdb, or we're trying to debug a non-Cygwin windows executable. */
1925 if (!get_module_name (0, path))
1931 /* Print status information about what we're accessing. */
1934 windows_files_info (struct target_ops *ignore)
1936 struct inferior *inf = current_inferior ();
1938 printf_unfiltered ("\tUsing the running image of %s %s.\n",
1939 inf->attach_flag ? "attached" : "child",
1940 target_pid_to_str (inferior_ptid));
1944 windows_open (char *arg, int from_tty)
1946 error (_("Use the \"run\" command to start a Unix child process."));
1949 /* Modify CreateProcess parameters for use of a new separate console.
1951 *FLAGS: DWORD parameter for general process creation flags.
1952 *SI: STARTUPINFO structure, for which the console window size and
1953 console buffer size is filled in if GDB is running in a console.
1954 to create the new console.
1955 The size of the used font is not available on all versions of
1956 Windows OS. Furthermore, the current font might not be the default
1957 font, but this is still better than before.
1958 If the windows and buffer sizes are computed,
1959 SI->DWFLAGS is changed so that this information is used
1960 by CreateProcess function. */
1963 windows_set_console_info (STARTUPINFO *si, DWORD *flags)
1965 HANDLE hconsole = CreateFile ("CONOUT$", GENERIC_READ | GENERIC_WRITE,
1966 FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0);
1968 if (hconsole != INVALID_HANDLE_VALUE)
1970 CONSOLE_SCREEN_BUFFER_INFO sbinfo;
1972 CONSOLE_FONT_INFO cfi;
1974 GetCurrentConsoleFont (hconsole, FALSE, &cfi);
1975 font_size = GetConsoleFontSize (hconsole, cfi.nFont);
1976 GetConsoleScreenBufferInfo(hconsole, &sbinfo);
1977 si->dwXSize = sbinfo.srWindow.Right - sbinfo.srWindow.Left + 1;
1978 si->dwYSize = sbinfo.srWindow.Bottom - sbinfo.srWindow.Top + 1;
1980 si->dwXSize *= font_size.X;
1984 si->dwYSize *= font_size.Y;
1987 si->dwXCountChars = sbinfo.dwSize.X;
1988 si->dwYCountChars = sbinfo.dwSize.Y;
1989 si->dwFlags |= STARTF_USESIZE | STARTF_USECOUNTCHARS;
1991 *flags |= CREATE_NEW_CONSOLE;
1995 /* Function called by qsort to sort environment strings. */
1998 envvar_cmp (const void *a, const void *b)
2000 const char **p = (const char **) a;
2001 const char **q = (const char **) b;
2002 return strcasecmp (*p, *q);
2008 clear_win32_environment (char **env)
2012 wchar_t *copy = NULL, *equalpos;
2014 for (i = 0; env[i] && *env[i]; i++)
2016 len = mbstowcs (NULL, env[i], 0) + 1;
2017 copy = (wchar_t *) xrealloc (copy, len * sizeof (wchar_t));
2018 mbstowcs (copy, env[i], len);
2019 equalpos = wcschr (copy, L'=');
2022 SetEnvironmentVariableW (copy, NULL);
2028 /* Start an inferior windows child process and sets inferior_ptid to its pid.
2029 EXEC_FILE is the file to run.
2030 ALLARGS is a string containing the arguments to the program.
2031 ENV is the environment vector to pass. Errors reported with error(). */
2034 windows_create_inferior (struct target_ops *ops, char *exec_file,
2035 char *allargs, char **in_env, int from_tty)
2039 cygwin_buf_t real_path[__PMAX];
2040 cygwin_buf_t shell[__PMAX]; /* Path to shell */
2042 cygwin_buf_t *toexec;
2043 cygwin_buf_t *cygallargs;
2045 char **old_env = NULL;
2049 int ostdin, ostdout, ostderr;
2051 char real_path[__PMAX];
2052 char shell[__PMAX]; /* Path to shell */
2064 PROCESS_INFORMATION pi;
2067 const char *inferior_io_terminal = get_inferior_io_terminal ();
2070 error (_("No executable specified, use `target exec'."));
2072 memset (&si, 0, sizeof (si));
2073 si.cb = sizeof (si);
2076 flags |= CREATE_NEW_PROCESS_GROUP;
2079 windows_set_console_info (&si, &flags);
2084 flags |= DEBUG_ONLY_THIS_PROCESS;
2085 if (cygwin_conv_path (CCP_POSIX_TO_WIN_W, exec_file, real_path,
2086 __PMAX * sizeof (cygwin_buf_t)) < 0)
2087 error (_("Error starting executable: %d"), errno);
2090 len = mbstowcs (NULL, allargs, 0) + 1;
2091 if (len == (size_t) -1)
2092 error (_("Error starting executable: %d"), errno);
2093 cygallargs = (wchar_t *) alloca (len * sizeof (wchar_t));
2094 mbstowcs (cygallargs, allargs, len);
2096 cygallargs = allargs;
2101 sh = getenv ("SHELL");
2104 if (cygwin_conv_path (CCP_POSIX_TO_WIN_W, sh, shell, __PMAX) < 0)
2105 error (_("Error starting executable via shell: %d"), errno);
2107 len = sizeof (L" -c 'exec '") + mbstowcs (NULL, exec_file, 0)
2108 + mbstowcs (NULL, allargs, 0) + 2;
2109 cygallargs = (wchar_t *) alloca (len * sizeof (wchar_t));
2110 swprintf (cygallargs, len, L" -c 'exec %s %s'", exec_file, allargs);
2112 len = (sizeof (" -c 'exec '") + strlen (exec_file)
2113 + strlen (allargs) + 2);
2114 cygallargs = (char *) alloca (len);
2115 xsnprintf (cygallargs, len, " -c 'exec %s %s'", exec_file, allargs);
2118 flags |= DEBUG_PROCESS;
2122 args = (cygwin_buf_t *) alloca ((wcslen (toexec) + wcslen (cygallargs) + 2)
2123 * sizeof (wchar_t));
2124 wcscpy (args, toexec);
2125 wcscat (args, L" ");
2126 wcscat (args, cygallargs);
2128 args = (cygwin_buf_t *) alloca (strlen (toexec) + strlen (cygallargs) + 2);
2129 strcpy (args, toexec);
2131 strcat (args, cygallargs);
2134 #ifdef CW_CVT_ENV_TO_WINENV
2135 /* First try to create a direct Win32 copy of the POSIX environment. */
2136 w32_env = (PWCHAR) cygwin_internal (CW_CVT_ENV_TO_WINENV, in_env);
2137 if (w32_env != (PWCHAR) -1)
2138 flags |= CREATE_UNICODE_ENVIRONMENT;
2140 /* If that fails, fall back to old method tweaking GDB's environment. */
2143 /* Reset all Win32 environment variables to avoid leftover on next run. */
2144 clear_win32_environment (environ);
2145 /* Prepare the environment vars for CreateProcess. */
2148 cygwin_internal (CW_SYNC_WINENV);
2152 if (!inferior_io_terminal)
2153 tty = ostdin = ostdout = ostderr = -1;
2156 tty = open (inferior_io_terminal, O_RDWR | O_NOCTTY);
2159 print_sys_errmsg (inferior_io_terminal, errno);
2160 ostdin = ostdout = ostderr = -1;
2173 windows_init_thread_list ();
2174 ret = CreateProcess (0,
2175 args, /* command line */
2176 NULL, /* Security */
2178 TRUE, /* inherit handles */
2179 flags, /* start flags */
2180 w32_env, /* environment */
2181 NULL, /* current directory */
2185 /* Just free the Win32 environment, if it could be created. */
2189 /* Reset all environment variables to avoid leftover on next run. */
2190 clear_win32_environment (in_env);
2191 /* Restore normal GDB environment variables. */
2193 cygwin_internal (CW_SYNC_WINENV);
2208 /* Build the command line, a space-separated list of tokens where
2209 the first token is the name of the module to be executed.
2210 To avoid ambiguities introduced by spaces in the module name,
2212 args_len = strlen (toexec) + 2 /* quotes */ + strlen (allargs) + 2;
2213 args = alloca (args_len);
2214 xsnprintf (args, args_len, "\"%s\" %s", toexec, allargs);
2216 flags |= DEBUG_ONLY_THIS_PROCESS;
2218 if (!inferior_io_terminal)
2219 tty = INVALID_HANDLE_VALUE;
2222 SECURITY_ATTRIBUTES sa;
2223 sa.nLength = sizeof(sa);
2224 sa.lpSecurityDescriptor = 0;
2225 sa.bInheritHandle = TRUE;
2226 tty = CreateFileA (inferior_io_terminal, GENERIC_READ | GENERIC_WRITE,
2227 0, &sa, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
2228 if (tty == INVALID_HANDLE_VALUE)
2229 warning (_("Warning: Failed to open TTY %s, error %#x."),
2230 inferior_io_terminal, (unsigned) GetLastError ());
2234 si.hStdOutput = tty;
2236 si.dwFlags |= STARTF_USESTDHANDLES;
2240 /* CreateProcess takes the environment list as a null terminated set of
2241 strings (i.e. two nulls terminate the list). */
2243 /* Get total size for env strings. */
2244 for (envlen = 0, i = 0; in_env[i] && *in_env[i]; i++)
2245 envlen += strlen (in_env[i]) + 1;
2247 envsize = sizeof (in_env[0]) * (i + 1);
2248 env = (char **) alloca (envsize);
2249 memcpy (env, in_env, envsize);
2250 /* Windows programs expect the environment block to be sorted. */
2251 qsort (env, i, sizeof (char *), envvar_cmp);
2253 w32env = alloca (envlen + 1);
2255 /* Copy env strings into new buffer. */
2256 for (temp = w32env, i = 0; env[i] && *env[i]; i++)
2258 strcpy (temp, env[i]);
2259 temp += strlen (temp) + 1;
2262 /* Final nil string to terminate new env. */
2265 windows_init_thread_list ();
2266 ret = CreateProcessA (0,
2267 args, /* command line */
2268 NULL, /* Security */
2270 TRUE, /* inherit handles */
2271 flags, /* start flags */
2272 w32env, /* environment */
2273 NULL, /* current directory */
2276 if (tty != INVALID_HANDLE_VALUE)
2281 error (_("Error creating process %s, (error %u)."),
2282 exec_file, (unsigned) GetLastError ());
2284 CloseHandle (pi.hThread);
2285 CloseHandle (pi.hProcess);
2287 if (useshell && shell[0] != '\0')
2292 do_initial_windows_stuff (ops, pi.dwProcessId, 0);
2294 /* windows_continue (DBG_CONTINUE, -1); */
2298 windows_mourn_inferior (struct target_ops *ops)
2300 (void) windows_continue (DBG_CONTINUE, -1);
2301 i386_cleanup_dregs();
2302 if (open_process_used)
2304 CHECK (CloseHandle (current_process_handle));
2305 open_process_used = 0;
2307 unpush_target (ops);
2308 generic_mourn_inferior ();
2311 /* Send a SIGINT to the process group. This acts just like the user typed a
2312 ^C on the controlling terminal. */
2315 windows_stop (ptid_t ptid)
2317 DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n"));
2318 CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId));
2319 registers_changed (); /* refresh register state */
2323 windows_xfer_memory (CORE_ADDR memaddr, gdb_byte *our, int len,
2324 int write, struct mem_attrib *mem,
2325 struct target_ops *target)
2330 DEBUG_MEM (("gdb: write target memory, %d bytes at %s\n",
2331 len, core_addr_to_string (memaddr)));
2332 if (!WriteProcessMemory (current_process_handle,
2333 (LPVOID) (uintptr_t) memaddr, our,
2336 FlushInstructionCache (current_process_handle,
2337 (LPCVOID) (uintptr_t) memaddr, len);
2341 DEBUG_MEM (("gdb: read target memory, %d bytes at %s\n",
2342 len, core_addr_to_string (memaddr)));
2343 if (!ReadProcessMemory (current_process_handle,
2344 (LPCVOID) (uintptr_t) memaddr, our,
2352 windows_kill_inferior (struct target_ops *ops)
2354 CHECK (TerminateProcess (current_process_handle, 0));
2358 if (!windows_continue (DBG_CONTINUE, -1))
2360 if (!WaitForDebugEvent (¤t_event, INFINITE))
2362 if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT)
2366 target_mourn_inferior (); /* Or just windows_mourn_inferior? */
2370 windows_prepare_to_store (struct regcache *regcache)
2372 /* Do nothing, since we can store individual regs. */
2376 windows_can_run (void)
2382 windows_close (void)
2384 DEBUG_EVENTS (("gdb: windows_close, inferior_ptid=%d\n",
2385 PIDGET (inferior_ptid)));
2388 /* Convert pid to printable format. */
2390 windows_pid_to_str (struct target_ops *ops, ptid_t ptid)
2392 static char buf[80];
2394 if (ptid_get_tid (ptid) != 0)
2396 snprintf (buf, sizeof (buf), "Thread %d.0x%lx",
2397 ptid_get_pid (ptid), ptid_get_tid (ptid));
2401 return normal_pid_to_str (ptid);
2405 windows_xfer_shared_libraries (struct target_ops *ops,
2406 enum target_object object, const char *annex,
2407 gdb_byte *readbuf, const gdb_byte *writebuf,
2408 ULONGEST offset, LONGEST len)
2410 struct obstack obstack;
2418 obstack_init (&obstack);
2419 obstack_grow_str (&obstack, "<library-list>\n");
2420 for (so = solib_start.next; so; so = so->next)
2421 windows_xfer_shared_library (so->so_name, (CORE_ADDR)
2422 (uintptr_t) so->lm_info->load_addr,
2423 target_gdbarch (), &obstack);
2424 obstack_grow_str0 (&obstack, "</library-list>\n");
2426 buf = obstack_finish (&obstack);
2427 len_avail = strlen (buf);
2428 if (offset >= len_avail)
2432 if (len > len_avail - offset)
2433 len = len_avail - offset;
2434 memcpy (readbuf, buf + offset, len);
2437 obstack_free (&obstack, NULL);
2442 windows_xfer_partial (struct target_ops *ops, enum target_object object,
2443 const char *annex, gdb_byte *readbuf,
2444 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
2448 case TARGET_OBJECT_MEMORY:
2450 return (*ops->deprecated_xfer_memory) (offset, readbuf,
2451 len, 0/*read*/, NULL, ops);
2453 return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf,
2454 len, 1/*write*/, NULL, ops);
2457 case TARGET_OBJECT_LIBRARIES:
2458 return windows_xfer_shared_libraries (ops, object, annex, readbuf,
2459 writebuf, offset, len);
2462 if (ops->beneath != NULL)
2463 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
2464 readbuf, writebuf, offset, len);
2469 /* Provide thread local base, i.e. Thread Information Block address.
2470 Returns 1 if ptid is found and sets *ADDR to thread_local_base. */
2473 windows_get_tib_address (ptid_t ptid, CORE_ADDR *addr)
2477 th = thread_rec (ptid_get_tid (ptid), 0);
2482 *addr = th->thread_local_base;
2488 windows_get_ada_task_ptid (long lwp, long thread)
2490 return ptid_build (ptid_get_pid (inferior_ptid), 0, lwp);
2494 init_windows_ops (void)
2496 windows_ops.to_shortname = "child";
2497 windows_ops.to_longname = "Win32 child process";
2498 windows_ops.to_doc = "Win32 child process (started by the \"run\" command).";
2499 windows_ops.to_open = windows_open;
2500 windows_ops.to_close = windows_close;
2501 windows_ops.to_attach = windows_attach;
2502 windows_ops.to_attach_no_wait = 1;
2503 windows_ops.to_detach = windows_detach;
2504 windows_ops.to_resume = windows_resume;
2505 windows_ops.to_wait = windows_wait;
2506 windows_ops.to_fetch_registers = windows_fetch_inferior_registers;
2507 windows_ops.to_store_registers = windows_store_inferior_registers;
2508 windows_ops.to_prepare_to_store = windows_prepare_to_store;
2509 windows_ops.deprecated_xfer_memory = windows_xfer_memory;
2510 windows_ops.to_xfer_partial = windows_xfer_partial;
2511 windows_ops.to_files_info = windows_files_info;
2512 windows_ops.to_insert_breakpoint = memory_insert_breakpoint;
2513 windows_ops.to_remove_breakpoint = memory_remove_breakpoint;
2514 windows_ops.to_terminal_init = terminal_init_inferior;
2515 windows_ops.to_terminal_inferior = terminal_inferior;
2516 windows_ops.to_terminal_ours_for_output = terminal_ours_for_output;
2517 windows_ops.to_terminal_ours = terminal_ours;
2518 windows_ops.to_terminal_save_ours = terminal_save_ours;
2519 windows_ops.to_terminal_info = child_terminal_info;
2520 windows_ops.to_kill = windows_kill_inferior;
2521 windows_ops.to_create_inferior = windows_create_inferior;
2522 windows_ops.to_mourn_inferior = windows_mourn_inferior;
2523 windows_ops.to_can_run = windows_can_run;
2524 windows_ops.to_thread_alive = windows_thread_alive;
2525 windows_ops.to_pid_to_str = windows_pid_to_str;
2526 windows_ops.to_stop = windows_stop;
2527 windows_ops.to_stratum = process_stratum;
2528 windows_ops.to_has_all_memory = default_child_has_all_memory;
2529 windows_ops.to_has_memory = default_child_has_memory;
2530 windows_ops.to_has_stack = default_child_has_stack;
2531 windows_ops.to_has_registers = default_child_has_registers;
2532 windows_ops.to_has_execution = default_child_has_execution;
2533 windows_ops.to_pid_to_exec_file = windows_pid_to_exec_file;
2534 windows_ops.to_get_ada_task_ptid = windows_get_ada_task_ptid;
2535 windows_ops.to_get_tib_address = windows_get_tib_address;
2537 i386_use_watchpoints (&windows_ops);
2539 i386_dr_low.set_control = cygwin_set_dr7;
2540 i386_dr_low.set_addr = cygwin_set_dr;
2541 i386_dr_low.get_addr = cygwin_get_dr;
2542 i386_dr_low.get_status = cygwin_get_dr6;
2543 i386_dr_low.get_control = cygwin_get_dr7;
2545 /* i386_dr_low.debug_register_length field is set by
2546 calling i386_set_debug_register_length function
2547 in processor windows specific native file. */
2549 windows_ops.to_magic = OPS_MAGIC;
2553 set_windows_aliases (char *argv0)
2555 add_info_alias ("dll", "sharedlibrary", 1);
2558 /* -Wmissing-prototypes */
2559 extern initialize_file_ftype _initialize_windows_nat;
2562 _initialize_windows_nat (void)
2564 struct cmd_list_element *c;
2566 init_windows_ops ();
2569 cygwin_internal (CW_SET_DOS_FILE_WARNING, 0);
2572 c = add_com ("dll-symbols", class_files, dll_symbol_command,
2573 _("Load dll library symbols from FILE."));
2574 set_cmd_completer (c, filename_completer);
2576 add_com_alias ("sharedlibrary", "dll-symbols", class_alias, 1);
2578 add_com_alias ("add-shared-symbol-files", "dll-symbols", class_alias, 1);
2580 add_com_alias ("assf", "dll-symbols", class_alias, 1);
2583 add_setshow_boolean_cmd ("shell", class_support, &useshell, _("\
2584 Set use of shell to start subprocess."), _("\
2585 Show use of shell to start subprocess."), NULL,
2587 NULL, /* FIXME: i18n: */
2588 &setlist, &showlist);
2590 add_setshow_boolean_cmd ("cygwin-exceptions", class_support,
2591 &cygwin_exceptions, _("\
2592 Break when an exception is detected in the Cygwin DLL itself."), _("\
2593 Show whether gdb breaks on exceptions in the Cygwin DLL itself."), NULL,
2595 NULL, /* FIXME: i18n: */
2596 &setlist, &showlist);
2599 add_setshow_boolean_cmd ("new-console", class_support, &new_console, _("\
2600 Set creation of new console when creating child process."), _("\
2601 Show creation of new console when creating child process."), NULL,
2603 NULL, /* FIXME: i18n: */
2604 &setlist, &showlist);
2606 add_setshow_boolean_cmd ("new-group", class_support, &new_group, _("\
2607 Set creation of new group when creating child process."), _("\
2608 Show creation of new group when creating child process."), NULL,
2610 NULL, /* FIXME: i18n: */
2611 &setlist, &showlist);
2613 add_setshow_boolean_cmd ("debugexec", class_support, &debug_exec, _("\
2614 Set whether to display execution in child process."), _("\
2615 Show whether to display execution in child process."), NULL,
2617 NULL, /* FIXME: i18n: */
2618 &setlist, &showlist);
2620 add_setshow_boolean_cmd ("debugevents", class_support, &debug_events, _("\
2621 Set whether to display kernel events in child process."), _("\
2622 Show whether to display kernel events in child process."), NULL,
2624 NULL, /* FIXME: i18n: */
2625 &setlist, &showlist);
2627 add_setshow_boolean_cmd ("debugmemory", class_support, &debug_memory, _("\
2628 Set whether to display memory accesses in child process."), _("\
2629 Show whether to display memory accesses in child process."), NULL,
2631 NULL, /* FIXME: i18n: */
2632 &setlist, &showlist);
2634 add_setshow_boolean_cmd ("debugexceptions", class_support,
2635 &debug_exceptions, _("\
2636 Set whether to display kernel exceptions in child process."), _("\
2637 Show whether to display kernel exceptions in child process."), NULL,
2639 NULL, /* FIXME: i18n: */
2640 &setlist, &showlist);
2642 init_w32_command_list ();
2644 add_cmd ("selector", class_info, display_selectors,
2645 _("Display selectors infos."),
2647 add_target (&windows_ops);
2648 deprecated_init_ui_hook = set_windows_aliases;
2651 /* Hardware watchpoint support, adapted from go32-nat.c code. */
2653 /* Pass the address ADDR to the inferior in the I'th debug register.
2654 Here we just store the address in dr array, the registers will be
2655 actually set up when windows_continue is called. */
2657 cygwin_set_dr (int i, CORE_ADDR addr)
2660 internal_error (__FILE__, __LINE__,
2661 _("Invalid register %d in cygwin_set_dr.\n"), i);
2663 debug_registers_changed = 1;
2664 debug_registers_used = 1;
2667 /* Pass the value VAL to the inferior in the DR7 debug control
2668 register. Here we just store the address in D_REGS, the watchpoint
2669 will be actually set up in windows_wait. */
2671 cygwin_set_dr7 (unsigned long val)
2673 dr[7] = (CORE_ADDR) val;
2674 debug_registers_changed = 1;
2675 debug_registers_used = 1;
2678 /* Get the value of debug register I from the inferior. */
2681 cygwin_get_dr (int i)
2686 /* Get the value of the DR6 debug status register from the inferior.
2687 Here we just return the value stored in dr[6]
2688 by the last call to thread_rec for current_event.dwThreadId id. */
2689 static unsigned long
2690 cygwin_get_dr6 (void)
2692 return (unsigned long) dr[6];
2695 /* Get the value of the DR7 debug status register from the inferior.
2696 Here we just return the value stored in dr[7] by the last call to
2697 thread_rec for current_event.dwThreadId id. */
2699 static unsigned long
2700 cygwin_get_dr7 (void)
2702 return (unsigned long) dr[7];
2705 /* Determine if the thread referenced by "ptid" is alive
2706 by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
2707 it means that the thread has died. Otherwise it is assumed to be alive. */
2709 windows_thread_alive (struct target_ops *ops, ptid_t ptid)
2713 gdb_assert (ptid_get_tid (ptid) != 0);
2714 tid = ptid_get_tid (ptid);
2716 return WaitForSingleObject (thread_rec (tid, FALSE)->h, 0) == WAIT_OBJECT_0
2720 /* -Wmissing-prototypes */
2721 extern initialize_file_ftype _initialize_check_for_gdb_ini;
2724 _initialize_check_for_gdb_ini (void)
2727 if (inhibit_gdbinit)
2730 homedir = getenv ("HOME");
2734 char *oldini = (char *) alloca (strlen (homedir) +
2735 sizeof ("/gdb.ini"));
2736 strcpy (oldini, homedir);
2737 p = strchr (oldini, '\0');
2738 if (p > oldini && !IS_DIR_SEPARATOR (p[-1]))
2740 strcpy (p, "gdb.ini");
2741 if (access (oldini, 0) == 0)
2743 int len = strlen (oldini);
2744 char *newini = alloca (len + 1);
2746 xsnprintf (newini, len + 1, "%.*s.gdbinit",
2747 (int) (len - (sizeof ("gdb.ini") - 1)), oldini);
2748 warning (_("obsolete '%s' found. Rename to '%s'."), oldini, newini);
2753 /* Define dummy functions which always return error for the rare cases where
2754 these functions could not be found. */
2756 bad_DebugActiveProcessStop (DWORD w)
2761 bad_DebugBreakProcess (HANDLE w)
2766 bad_DebugSetProcessKillOnExit (BOOL w)
2771 bad_EnumProcessModules (HANDLE w, HMODULE *x, DWORD y, LPDWORD z)
2778 bad_GetModuleFileNameExW (HANDLE w, HMODULE x, LPWSTR y, DWORD z)
2784 bad_GetModuleFileNameExA (HANDLE w, HMODULE x, LPSTR y, DWORD z)
2791 bad_GetModuleInformation (HANDLE w, HMODULE x, LPMODULEINFO y, DWORD z)
2797 bad_OpenProcessToken (HANDLE w, DWORD x, PHANDLE y)
2803 bad_GetCurrentConsoleFont (HANDLE w, BOOL bMaxWindow, CONSOLE_FONT_INFO *f)
2809 bad_GetConsoleFontSize (HANDLE w, DWORD nFont)
2817 /* -Wmissing-prototypes */
2818 extern initialize_file_ftype _initialize_loadable;
2820 /* Load any functions which may not be available in ancient versions
2824 _initialize_loadable (void)
2828 hm = LoadLibrary ("kernel32.dll");
2831 DebugActiveProcessStop = (void *)
2832 GetProcAddress (hm, "DebugActiveProcessStop");
2833 DebugBreakProcess = (void *)
2834 GetProcAddress (hm, "DebugBreakProcess");
2835 DebugSetProcessKillOnExit = (void *)
2836 GetProcAddress (hm, "DebugSetProcessKillOnExit");
2837 GetConsoleFontSize = (void *)
2838 GetProcAddress (hm, "GetConsoleFontSize");
2839 GetCurrentConsoleFont = (void *)
2840 GetProcAddress (hm, "GetCurrentConsoleFont");
2843 /* Set variables to dummy versions of these processes if the function
2844 wasn't found in kernel32.dll. */
2845 if (!DebugBreakProcess)
2846 DebugBreakProcess = bad_DebugBreakProcess;
2847 if (!DebugActiveProcessStop || !DebugSetProcessKillOnExit)
2849 DebugActiveProcessStop = bad_DebugActiveProcessStop;
2850 DebugSetProcessKillOnExit = bad_DebugSetProcessKillOnExit;
2852 if (!GetConsoleFontSize)
2853 GetConsoleFontSize = bad_GetConsoleFontSize;
2854 if (!GetCurrentConsoleFont)
2855 GetCurrentConsoleFont = bad_GetCurrentConsoleFont;
2857 /* Load optional functions used for retrieving filename information
2858 associated with the currently debugged process or its dlls. */
2859 hm = LoadLibrary ("psapi.dll");
2862 EnumProcessModules = (void *)
2863 GetProcAddress (hm, "EnumProcessModules");
2864 GetModuleInformation = (void *)
2865 GetProcAddress (hm, "GetModuleInformation");
2866 GetModuleFileNameEx = (void *)
2867 GetProcAddress (hm, GetModuleFileNameEx_name);
2870 if (!EnumProcessModules || !GetModuleInformation || !GetModuleFileNameEx)
2872 /* Set variables to dummy versions of these processes if the function
2873 wasn't found in psapi.dll. */
2874 EnumProcessModules = bad_EnumProcessModules;
2875 GetModuleInformation = bad_GetModuleInformation;
2876 GetModuleFileNameEx = bad_GetModuleFileNameEx;
2877 /* This will probably fail on Windows 9x/Me. Let the user know
2878 that we're missing some functionality. */
2880 cannot automatically find executable file or library to read symbols.\n\
2881 Use \"file\" or \"dll\" command to load executable/libraries directly."));
2884 hm = LoadLibrary ("advapi32.dll");
2887 OpenProcessToken = (void *) GetProcAddress (hm, "OpenProcessToken");
2888 LookupPrivilegeValueA = (void *)
2889 GetProcAddress (hm, "LookupPrivilegeValueA");
2890 AdjustTokenPrivileges = (void *)
2891 GetProcAddress (hm, "AdjustTokenPrivileges");
2892 /* Only need to set one of these since if OpenProcessToken fails nothing
2894 if (!OpenProcessToken || !LookupPrivilegeValueA
2895 || !AdjustTokenPrivileges)
2896 OpenProcessToken = bad_OpenProcessToken;