1 /* Target-vector operations for controlling win32 child processes, for GDB.
3 Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
4 Free Software Foundation, Inc.
6 Contributed by Cygnus Solutions, A Red Hat Company.
8 This file is part of GDB.
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.
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.
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. */
25 /* Originally by Steve Chamberlain, sac@cygnus.com */
27 /* We assume we're being built with and will be used for cygwin. */
30 #include "frame.h" /* required by inferior.h */
33 #include "exceptions.h"
36 #include "completer.h"
40 #include <sys/types.h>
45 #include <sys/cygwin.h>
50 #include "gdb_string.h"
51 #include "gdbthread.h"
53 #include <sys/param.h>
57 #include "i386-tdep.h"
58 #include "i387-tdep.h"
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
66 FLAG_TRACE_BIT = 0x100,
67 CONTEXT_DEBUGGER = (CONTEXT_FULL | CONTEXT_FLOATING_POINT)
70 #include <sys/procfs.h>
73 #define CONTEXT_DEBUGGER_DR CONTEXT_DEBUGGER | CONTEXT_DEBUG_REGISTERS \
74 | CONTEXT_EXTENDED_REGISTERS
76 static unsigned dr[8];
77 static int debug_registers_changed;
78 static int debug_registers_used;
80 /* The string sent by cygwin when it processes a signal.
81 FIXME: This should be in a cygwin include file. */
82 #define CYGWIN_SIGNAL_STRING "cygwin: signal"
84 #define CHECK(x) check (x, __FILE__,__LINE__)
85 #define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x
86 #define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x
87 #define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x
88 #define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x
90 static void child_stop (void);
91 static int win32_child_thread_alive (ptid_t);
92 void child_kill_inferior (void);
94 static enum target_signal last_sig = TARGET_SIGNAL_0;
95 /* Set if a signal was received from the debugged process */
97 /* Thread information structure used to track information that is
98 not available in gdb's thread structure. */
99 typedef struct thread_info_struct
101 struct thread_info_struct *next;
112 static thread_info thread_head;
114 /* The process and thread handles for the above context. */
116 static DEBUG_EVENT current_event; /* The current debug event from
118 static HANDLE current_process_handle; /* Currently executing process */
119 static thread_info *current_thread; /* Info on currently selected thread */
120 static DWORD main_thread_id; /* Thread ID of the main thread */
122 /* Counts of things. */
123 static int exception_count = 0;
124 static int event_count = 0;
125 static int saw_create;
128 static int new_console = 0;
129 static int new_group = 1;
130 static int debug_exec = 0; /* show execution */
131 static int debug_events = 0; /* show events from kernel */
132 static int debug_memory = 0; /* show target memory accesses */
133 static int debug_exceptions = 0; /* show target exceptions */
134 static int useshell = 0; /* use shell for subprocesses */
136 /* This vector maps GDB's idea of a register's number into an address
137 in the win32 exception context vector.
139 It also contains the bit mask needed to load the register in question.
141 One day we could read a reg, we could inspect the context we
142 already have loaded, if it doesn't have the bit set that we need,
143 we read that set of registers in using GetThreadContext. If the
144 context already contains what we need, we just unpack it. Then to
145 write a register, first we have to ensure that the context contains
146 the other regs of the group, and then we copy the info in and set
149 #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
150 static const int mappings[] =
152 context_offset (Eax),
153 context_offset (Ecx),
154 context_offset (Edx),
155 context_offset (Ebx),
156 context_offset (Esp),
157 context_offset (Ebp),
158 context_offset (Esi),
159 context_offset (Edi),
160 context_offset (Eip),
161 context_offset (EFlags),
162 context_offset (SegCs),
163 context_offset (SegSs),
164 context_offset (SegDs),
165 context_offset (SegEs),
166 context_offset (SegFs),
167 context_offset (SegGs),
168 context_offset (FloatSave.RegisterArea[0 * 10]),
169 context_offset (FloatSave.RegisterArea[1 * 10]),
170 context_offset (FloatSave.RegisterArea[2 * 10]),
171 context_offset (FloatSave.RegisterArea[3 * 10]),
172 context_offset (FloatSave.RegisterArea[4 * 10]),
173 context_offset (FloatSave.RegisterArea[5 * 10]),
174 context_offset (FloatSave.RegisterArea[6 * 10]),
175 context_offset (FloatSave.RegisterArea[7 * 10]),
176 context_offset (FloatSave.ControlWord),
177 context_offset (FloatSave.StatusWord),
178 context_offset (FloatSave.TagWord),
179 context_offset (FloatSave.ErrorSelector),
180 context_offset (FloatSave.ErrorOffset),
181 context_offset (FloatSave.DataSelector),
182 context_offset (FloatSave.DataOffset),
183 context_offset (FloatSave.ErrorSelector)
185 context_offset (ExtendedRegisters[10*16]),
186 context_offset (ExtendedRegisters[11*16]),
187 context_offset (ExtendedRegisters[12*16]),
188 context_offset (ExtendedRegisters[13*16]),
189 context_offset (ExtendedRegisters[14*16]),
190 context_offset (ExtendedRegisters[15*16]),
191 context_offset (ExtendedRegisters[16*16]),
192 context_offset (ExtendedRegisters[17*16]),
194 context_offset (ExtendedRegisters[24])
197 #undef context_offset
199 /* This vector maps the target's idea of an exception (extracted
200 from the DEBUG_EVENT structure) to GDB's idea. */
202 struct xlate_exception
205 enum target_signal us;
208 static const struct xlate_exception
211 {EXCEPTION_ACCESS_VIOLATION, TARGET_SIGNAL_SEGV},
212 {STATUS_STACK_OVERFLOW, TARGET_SIGNAL_SEGV},
213 {EXCEPTION_BREAKPOINT, TARGET_SIGNAL_TRAP},
214 {DBG_CONTROL_C, TARGET_SIGNAL_INT},
215 {EXCEPTION_SINGLE_STEP, TARGET_SIGNAL_TRAP},
216 {STATUS_FLOAT_DIVIDE_BY_ZERO, TARGET_SIGNAL_FPE},
220 check (BOOL ok, const char *file, int line)
223 printf_filtered ("error return %s:%d was %lu\n", file, line,
227 /* Find a thread record given a thread id.
228 If get_context then also retrieve the context for this
231 thread_rec (DWORD id, int get_context)
235 for (th = &thread_head; (th = th->next) != NULL;)
238 if (!th->suspend_count && get_context)
240 if (get_context > 0 && id != current_event.dwThreadId)
241 th->suspend_count = SuspendThread (th->h) + 1;
242 else if (get_context < 0)
243 th->suspend_count = -1;
244 th->reload_context = 1;
252 /* Add a thread to the thread list */
254 child_add_thread (DWORD id, HANDLE h)
258 if ((th = thread_rec (id, FALSE)))
261 th = (thread_info *) xmalloc (sizeof (*th));
262 memset (th, 0, sizeof (*th));
265 th->next = thread_head.next;
266 thread_head.next = th;
267 add_thread (pid_to_ptid (id));
268 /* Set the debug registers for the new thread in they are used. */
269 if (debug_registers_used)
271 /* Only change the value of the debug registers. */
272 th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS;
273 CHECK (GetThreadContext (th->h, &th->context));
274 th->context.Dr0 = dr[0];
275 th->context.Dr1 = dr[1];
276 th->context.Dr2 = dr[2];
277 th->context.Dr3 = dr[3];
278 /* th->context.Dr6 = dr[6];
279 FIXME: should we set dr6 also ?? */
280 th->context.Dr7 = dr[7];
281 CHECK (SetThreadContext (th->h, &th->context));
282 th->context.ContextFlags = 0;
287 /* Clear out any old thread list and reintialize it to a
290 child_init_thread_list (void)
292 thread_info *th = &thread_head;
294 DEBUG_EVENTS (("gdb: child_init_thread_list\n"));
296 while (th->next != NULL)
298 thread_info *here = th->next;
299 th->next = here->next;
300 (void) CloseHandle (here->h);
303 thread_head.next = NULL;
306 /* Delete a thread from the list of threads */
308 child_delete_thread (DWORD id)
313 printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (pid_to_ptid (id)));
314 delete_thread (pid_to_ptid (id));
316 for (th = &thread_head;
317 th->next != NULL && th->next->id != id;
321 if (th->next != NULL)
323 thread_info *here = th->next;
324 th->next = here->next;
325 CloseHandle (here->h);
331 do_child_fetch_inferior_registers (int r)
333 char *context_offset = ((char *) ¤t_thread->context) + mappings[r];
337 return; /* Windows sometimes uses a non-existent thread id in its
340 if (current_thread->reload_context)
342 thread_info *th = current_thread;
343 th->context.ContextFlags = CONTEXT_DEBUGGER_DR;
344 GetThreadContext (th->h, &th->context);
345 /* Copy dr values from that thread. */
346 dr[0] = th->context.Dr0;
347 dr[1] = th->context.Dr1;
348 dr[2] = th->context.Dr2;
349 dr[3] = th->context.Dr3;
350 dr[6] = th->context.Dr6;
351 dr[7] = th->context.Dr7;
352 current_thread->reload_context = 0;
355 #define I387_ST0_REGNUM I386_ST0_REGNUM
357 if (r == I387_FISEG_REGNUM)
359 l = *((long *) context_offset) & 0xffff;
360 regcache_raw_supply (current_regcache, r, (char *) &l);
362 else if (r == I387_FOP_REGNUM)
364 l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1);
365 regcache_raw_supply (current_regcache, r, (char *) &l);
368 regcache_raw_supply (current_regcache, r, context_offset);
371 for (r = 0; r < NUM_REGS; r++)
372 do_child_fetch_inferior_registers (r);
375 #undef I387_ST0_REGNUM
379 child_fetch_inferior_registers (int r)
381 current_thread = thread_rec (PIDGET (inferior_ptid), TRUE);
382 /* Check if current_thread exists. Windows sometimes uses a non-existent
383 thread id in its events */
385 do_child_fetch_inferior_registers (r);
389 do_child_store_inferior_registers (int r)
392 /* Windows sometimes uses a non-existent thread id in its events */;
394 regcache_raw_collect (current_regcache, r,
395 ((char *) ¤t_thread->context) + mappings[r]);
398 for (r = 0; r < NUM_REGS; r++)
399 do_child_store_inferior_registers (r);
403 /* Store a new register value into the current thread context */
405 child_store_inferior_registers (int r)
407 current_thread = thread_rec (PIDGET (inferior_ptid), TRUE);
408 /* Check if current_thread exists. Windows sometimes uses a non-existent
409 thread id in its events */
411 do_child_store_inferior_registers (r);
414 static int psapi_loaded = 0;
415 static HMODULE psapi_module_handle = NULL;
416 static BOOL WINAPI (*psapi_EnumProcessModules) (HANDLE, HMODULE *, DWORD, LPDWORD) = NULL;
417 static BOOL WINAPI (*psapi_GetModuleInformation) (HANDLE, HMODULE, LPMODULEINFO, DWORD) = NULL;
418 static DWORD WINAPI (*psapi_GetModuleFileNameExA) (HANDLE, HMODULE, LPSTR, DWORD) = NULL;
421 psapi_get_dll_name (DWORD BaseAddress, char *dll_name_ret)
427 HMODULE *DllHandle = dh_buf;
432 psapi_EnumProcessModules == NULL ||
433 psapi_GetModuleInformation == NULL ||
434 psapi_GetModuleFileNameExA == NULL)
439 psapi_module_handle = LoadLibrary ("psapi.dll");
440 if (!psapi_module_handle)
442 /* printf_unfiltered ("error loading psapi.dll: %u", GetLastError ()); */
445 psapi_EnumProcessModules = GetProcAddress (psapi_module_handle, "EnumProcessModules");
446 psapi_GetModuleInformation = GetProcAddress (psapi_module_handle, "GetModuleInformation");
447 psapi_GetModuleFileNameExA = (void *) GetProcAddress (psapi_module_handle,
448 "GetModuleFileNameExA");
449 if (psapi_EnumProcessModules == NULL ||
450 psapi_GetModuleInformation == NULL ||
451 psapi_GetModuleFileNameExA == NULL)
456 ok = (*psapi_EnumProcessModules) (current_process_handle,
461 if (!ok || !cbNeeded)
464 DllHandle = (HMODULE *) alloca (cbNeeded);
468 ok = (*psapi_EnumProcessModules) (current_process_handle,
475 for (i = 0; i < (int) (cbNeeded / sizeof (HMODULE)); i++)
477 if (!(*psapi_GetModuleInformation) (current_process_handle,
481 error (_("Can't get module info"));
483 len = (*psapi_GetModuleFileNameExA) (current_process_handle,
488 error (_("Error getting dll name: %u."), (unsigned) GetLastError ());
490 if ((DWORD) (mi.lpBaseOfDll) == BaseAddress)
495 dll_name_ret[0] = '\0';
499 /* Encapsulate the information required in a call to
500 symbol_file_add_args */
501 struct safe_symbol_file_add_args
505 struct section_addr_info *addrs;
508 struct ui_file *err, *out;
512 /* Maintain a linked list of "so" information. */
515 struct so_stuff *next;
519 struct objfile *objfile;
521 } solib_start, *solib_end;
523 /* Call symbol_file_add with stderr redirected. We don't care if there
526 safe_symbol_file_add_stub (void *argv)
528 #define p ((struct safe_symbol_file_add_args *)argv)
529 struct so_stuff *so = &solib_start;
531 while ((so = so->next))
532 if (so->loaded && strcasecmp (so->name, p->name) == 0)
534 p->ret = symbol_file_add (p->name, p->from_tty, p->addrs, p->mainline, p->flags);
539 /* Restore gdb's stderr after calling symbol_file_add */
541 safe_symbol_file_add_cleanup (void *p)
543 #define sp ((struct safe_symbol_file_add_args *)p)
544 gdb_flush (gdb_stderr);
545 gdb_flush (gdb_stdout);
546 ui_file_delete (gdb_stderr);
547 ui_file_delete (gdb_stdout);
548 gdb_stderr = sp->err;
549 gdb_stdout = sp->out;
553 /* symbol_file_add wrapper that prevents errors from being displayed. */
554 static struct objfile *
555 safe_symbol_file_add (char *name, int from_tty,
556 struct section_addr_info *addrs,
557 int mainline, int flags)
559 struct safe_symbol_file_add_args p;
560 struct cleanup *cleanup;
562 cleanup = make_cleanup (safe_symbol_file_add_cleanup, &p);
566 gdb_flush (gdb_stderr);
567 gdb_flush (gdb_stdout);
568 gdb_stderr = ui_file_new ();
569 gdb_stdout = ui_file_new ();
571 p.from_tty = from_tty;
573 p.mainline = mainline;
575 catch_errors (safe_symbol_file_add_stub, &p, "", RETURN_MASK_ERROR);
577 do_cleanups (cleanup);
581 /* Remember the maximum DLL length for printing in info dll command. */
582 int max_dll_name_len;
585 register_loaded_dll (const char *name, DWORD load_addr)
588 char ppath[MAX_PATH + 1];
589 char buf[MAX_PATH + 1];
590 char cwd[MAX_PATH + 1];
592 WIN32_FIND_DATA w32_fd;
593 HANDLE h = FindFirstFile(name, &w32_fd);
594 MEMORY_BASIC_INFORMATION m;
597 if (h == INVALID_HANDLE_VALUE)
603 if (GetCurrentDirectory (MAX_PATH + 1, cwd))
605 p = strrchr (buf, '\\');
608 SetCurrentDirectory (buf);
609 GetFullPathName (w32_fd.cFileName, MAX_PATH, buf, &p);
610 SetCurrentDirectory (cwd);
614 cygwin_conv_to_posix_path (buf, ppath);
615 so = (struct so_stuff *) xmalloc (sizeof (struct so_stuff) + strlen (ppath) + 8 + 1);
617 so->load_addr = load_addr;
618 if (VirtualQueryEx (current_process_handle, (void *) load_addr, &m,
620 so->end_addr = (DWORD) m.AllocationBase + m.RegionSize;
622 so->end_addr = load_addr + 0x2000; /* completely arbitrary */
626 strcpy (so->name, ppath);
628 solib_end->next = so;
630 len = strlen (ppath);
631 if (len > max_dll_name_len)
632 max_dll_name_len = len;
636 get_image_name (HANDLE h, void *address, int unicode)
638 static char buf[(2 * MAX_PATH) + 1];
639 DWORD size = unicode ? sizeof (WCHAR) : sizeof (char);
645 /* Attempt to read the name of the dll that was detected.
646 This is documented to work only when actively debugging
647 a program. It will not work for attached processes. */
651 /* See if we could read the address of a string, and that the
652 address isn't null. */
653 if (!ReadProcessMemory (h, address, &address_ptr, sizeof (address_ptr), &done)
654 || done != sizeof (address_ptr) || !address_ptr)
657 /* Find the length of the string */
658 while (ReadProcessMemory (h, address_ptr + len++ * size, &b, size, &done)
659 && (b[0] != 0 || b[size - 1] != 0) && done == size)
663 ReadProcessMemory (h, address_ptr, buf, len, &done);
666 WCHAR *unicode_address = (WCHAR *) alloca (len * sizeof (WCHAR));
667 ReadProcessMemory (h, address_ptr, unicode_address, len * sizeof (WCHAR),
670 WideCharToMultiByte (CP_ACP, 0, unicode_address, len, buf, len, 0, 0);
676 /* Wait for child to do something. Return pid of child, or -1 in case
677 of error; store status through argument pointer OURSTATUS. */
679 handle_load_dll (void *dummy)
681 LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll;
682 char dll_buf[MAX_PATH + 1];
683 char *dll_name = NULL;
686 dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0';
688 if (!psapi_get_dll_name ((DWORD) (event->lpBaseOfDll), dll_buf))
689 dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0';
693 if (*dll_name == '\0')
694 dll_name = get_image_name (current_process_handle, event->lpImageName, event->fUnicode);
698 register_loaded_dll (dll_name, (DWORD) event->lpBaseOfDll + 0x1000);
704 handle_unload_dll (void *dummy)
706 DWORD lpBaseOfDll = (DWORD) current_event.u.UnloadDll.lpBaseOfDll + 0x1000;
709 for (so = &solib_start; so->next != NULL; so = so->next)
710 if (so->next->load_addr == lpBaseOfDll)
712 struct so_stuff *sodel = so->next;
713 so->next = sodel->next;
717 free_objfile (sodel->objfile);
721 error (_("Error: dll starting at 0x%lx not found."), (DWORD) lpBaseOfDll);
727 solib_address (CORE_ADDR address)
730 for (so = &solib_start; so->next != NULL; so = so->next)
731 if (address >= so->load_addr && address <= so->end_addr)
736 /* Return name of last loaded DLL. */
738 child_solib_loaded_library_pathname (int pid)
740 return !solib_end || !solib_end->name[0] ? NULL : solib_end->name;
743 /* Clear list of loaded DLLs. */
745 child_clear_solibs (void)
747 struct so_stuff *so, *so1 = solib_start.next;
749 while ((so = so1) != NULL)
755 solib_start.next = NULL;
756 solib_start.objfile = NULL;
757 solib_end = &solib_start;
758 max_dll_name_len = sizeof ("DLL Name") - 1;
761 /* Get the loaded address of all sections, given that .text was loaded
762 at text_load. Assumes that all sections are subject to the same
763 relocation offset. Returns NULL if problems occur or if the
764 sections were not relocated. */
766 static struct section_addr_info *
767 get_relocated_section_addrs (bfd *abfd, CORE_ADDR text_load)
769 struct section_addr_info *result = NULL;
770 int section_count = bfd_count_sections (abfd);
771 asection *text_section = bfd_get_section_by_name (abfd, ".text");
776 /* Couldn't get the .text section. Weird. */
779 else if (text_load == (text_vma = bfd_get_section_vma (abfd, text_section)))
781 /* DLL wasn't relocated. */
786 /* Figure out all sections' loaded addresses. The offset here is
787 such that taking a bfd_get_section_vma() result and adding
788 offset will give the real load address of the section. */
790 CORE_ADDR offset = text_load - text_vma;
792 struct section_table *table_start = NULL;
793 struct section_table *table_end = NULL;
794 struct section_table *iter = NULL;
796 build_section_table (abfd, &table_start, &table_end);
798 for (iter = table_start; iter < table_end; ++iter)
800 /* Relocated addresses. */
801 iter->addr += offset;
802 iter->endaddr += offset;
805 result = build_section_addr_info_from_section_table (table_start,
814 /* Add DLL symbol information. */
815 static struct objfile *
816 solib_symbols_add (char *name, int from_tty, CORE_ADDR load_addr)
818 struct section_addr_info *addrs = NULL;
819 static struct objfile *result = NULL;
822 /* The symbols in a dll are offset by 0x1000, which is the
823 the offset from 0 of the first byte in an image - because
824 of the file header and the section alignment. */
826 if (!name || !name[0])
829 abfd = bfd_openr (name, "pei-i386");
833 /* pei failed - try pe */
834 abfd = bfd_openr (name, "pe-i386");
839 if (bfd_check_format (abfd, bfd_object))
841 addrs = get_relocated_section_addrs (abfd, load_addr);
849 result = safe_symbol_file_add (name, from_tty, addrs, 0, OBJF_SHARED);
850 free_section_addr_info (addrs);
854 /* Fallback on handling just the .text section. */
855 struct cleanup *my_cleanups;
857 addrs = alloc_section_addr_info (1);
858 my_cleanups = make_cleanup (xfree, addrs);
859 addrs->other[0].name = ".text";
860 addrs->other[0].addr = load_addr;
862 result = safe_symbol_file_add (name, from_tty, addrs, 0, OBJF_SHARED);
863 do_cleanups (my_cleanups);
869 /* Load DLL symbol info. */
871 dll_symbol_command (char *args, int from_tty)
877 error (_("dll-symbols requires a file name"));
880 if (n > 4 && strcasecmp (args + n - 4, ".dll") != 0)
882 char *newargs = (char *) alloca (n + 4 + 1);
883 strcpy (newargs, args);
884 strcat (newargs, ".dll");
888 safe_symbol_file_add (args, from_tty, NULL, 0, OBJF_SHARED | OBJF_USERLOADED);
891 /* List currently loaded DLLs. */
893 info_dll_command (char *ignore, int from_tty)
895 struct so_stuff *so = &solib_start;
900 printf_filtered ("%*s Load Address\n", -max_dll_name_len, "DLL Name");
901 while ((so = so->next) != NULL)
902 printf_filtered ("%*s %08lx\n", -max_dll_name_len, so->name, so->load_addr);
907 /* Handle DEBUG_STRING output from child process.
908 Cygwin prepends its messages with a "cygwin:". Interpret this as
909 a Cygwin signal. Otherwise just print the string as a warning. */
911 handle_output_debug_string (struct target_waitstatus *ourstatus)
916 if (!target_read_string
917 ((CORE_ADDR) current_event.u.DebugString.lpDebugStringData, &s, 1024, 0)
921 if (strncmp (s, CYGWIN_SIGNAL_STRING, sizeof (CYGWIN_SIGNAL_STRING) - 1) != 0)
923 if (strncmp (s, "cYg", 3) != 0)
929 int sig = strtol (s + sizeof (CYGWIN_SIGNAL_STRING) - 1, &p, 0);
930 gotasig = target_signal_from_host (sig);
931 ourstatus->value.sig = gotasig;
933 ourstatus->kind = TARGET_WAITKIND_STOPPED;
941 display_selector (HANDLE thread, DWORD sel)
944 if (GetThreadSelectorEntry (thread, sel, &info))
947 printf_filtered ("0x%03lx: ", sel);
948 if (!info.HighWord.Bits.Pres)
950 puts_filtered ("Segment not present\n");
953 base = (info.HighWord.Bits.BaseHi << 24) +
954 (info.HighWord.Bits.BaseMid << 16)
956 limit = (info.HighWord.Bits.LimitHi << 16) + info.LimitLow;
957 if (info.HighWord.Bits.Granularity)
958 limit = (limit << 12) | 0xfff;
959 printf_filtered ("base=0x%08x limit=0x%08x", base, limit);
960 if (info.HighWord.Bits.Default_Big)
961 puts_filtered(" 32-bit ");
963 puts_filtered(" 16-bit ");
964 switch ((info.HighWord.Bits.Type & 0xf) >> 1)
967 puts_filtered ("Data (Read-Only, Exp-up");
970 puts_filtered ("Data (Read/Write, Exp-up");
973 puts_filtered ("Unused segment (");
976 puts_filtered ("Data (Read/Write, Exp-down");
979 puts_filtered ("Code (Exec-Only, N.Conf");
982 puts_filtered ("Code (Exec/Read, N.Conf");
985 puts_filtered ("Code (Exec-Only, Conf");
988 puts_filtered ("Code (Exec/Read, Conf");
991 printf_filtered ("Unknown type 0x%x",info.HighWord.Bits.Type);
993 if ((info.HighWord.Bits.Type & 0x1) == 0)
994 puts_filtered(", N.Acc");
995 puts_filtered (")\n");
996 if ((info.HighWord.Bits.Type & 0x10) == 0)
997 puts_filtered("System selector ");
998 printf_filtered ("Priviledge level = %d. ", info.HighWord.Bits.Dpl);
999 if (info.HighWord.Bits.Granularity)
1000 puts_filtered ("Page granular.\n");
1002 puts_filtered ("Byte granular.\n");
1007 printf_filtered ("Invalid selector 0x%lx.\n",sel);
1013 display_selectors (char * args, int from_tty)
1015 if (!current_thread)
1017 puts_filtered ("Impossible to display selectors now.\n");
1023 puts_filtered ("Selector $cs\n");
1024 display_selector (current_thread->h,
1025 current_thread->context.SegCs);
1026 puts_filtered ("Selector $ds\n");
1027 display_selector (current_thread->h,
1028 current_thread->context.SegDs);
1029 puts_filtered ("Selector $es\n");
1030 display_selector (current_thread->h,
1031 current_thread->context.SegEs);
1032 puts_filtered ("Selector $ss\n");
1033 display_selector (current_thread->h,
1034 current_thread->context.SegSs);
1035 puts_filtered ("Selector $fs\n");
1036 display_selector (current_thread->h,
1037 current_thread->context.SegFs);
1038 puts_filtered ("Selector $gs\n");
1039 display_selector (current_thread->h,
1040 current_thread->context.SegGs);
1045 sel = parse_and_eval_long (args);
1046 printf_filtered ("Selector \"%s\"\n",args);
1047 display_selector (current_thread->h, sel);
1051 static struct cmd_list_element *info_w32_cmdlist = NULL;
1054 info_w32_command (char *args, int from_tty)
1056 help_list (info_w32_cmdlist, "info w32 ", class_info, gdb_stdout);
1060 #define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \
1061 printf_unfiltered ("gdb: Target exception %s at 0x%08lx\n", x, \
1062 (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress)
1065 handle_exception (struct target_waitstatus *ourstatus)
1068 DWORD code = current_event.u.Exception.ExceptionRecord.ExceptionCode;
1070 ourstatus->kind = TARGET_WAITKIND_STOPPED;
1072 /* Record the context of the current thread */
1073 th = thread_rec (current_event.dwThreadId, -1);
1077 case EXCEPTION_ACCESS_VIOLATION:
1078 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ACCESS_VIOLATION");
1079 ourstatus->value.sig = TARGET_SIGNAL_SEGV;
1081 case STATUS_STACK_OVERFLOW:
1082 DEBUG_EXCEPTION_SIMPLE ("STATUS_STACK_OVERFLOW");
1083 ourstatus->value.sig = TARGET_SIGNAL_SEGV;
1085 case STATUS_FLOAT_DENORMAL_OPERAND:
1086 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DENORMAL_OPERAND");
1087 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1089 case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
1090 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ARRAY_BOUNDS_EXCEEDED");
1091 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1093 case STATUS_FLOAT_INEXACT_RESULT:
1094 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INEXACT_RESULT");
1095 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1097 case STATUS_FLOAT_INVALID_OPERATION:
1098 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INVALID_OPERATION");
1099 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1101 case STATUS_FLOAT_OVERFLOW:
1102 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_OVERFLOW");
1103 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1105 case STATUS_FLOAT_STACK_CHECK:
1106 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_STACK_CHECK");
1107 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1109 case STATUS_FLOAT_UNDERFLOW:
1110 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_UNDERFLOW");
1111 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1113 case STATUS_FLOAT_DIVIDE_BY_ZERO:
1114 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DIVIDE_BY_ZERO");
1115 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1117 case STATUS_INTEGER_DIVIDE_BY_ZERO:
1118 DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_DIVIDE_BY_ZERO");
1119 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1121 case STATUS_INTEGER_OVERFLOW:
1122 DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_OVERFLOW");
1123 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1125 case EXCEPTION_BREAKPOINT:
1126 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT");
1127 ourstatus->value.sig = TARGET_SIGNAL_TRAP;
1130 DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_C");
1131 ourstatus->value.sig = TARGET_SIGNAL_INT;
1133 case DBG_CONTROL_BREAK:
1134 DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_BREAK");
1135 ourstatus->value.sig = TARGET_SIGNAL_INT;
1137 case EXCEPTION_SINGLE_STEP:
1138 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_SINGLE_STEP");
1139 ourstatus->value.sig = TARGET_SIGNAL_TRAP;
1141 case EXCEPTION_ILLEGAL_INSTRUCTION:
1142 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ILLEGAL_INSTRUCTION");
1143 ourstatus->value.sig = TARGET_SIGNAL_ILL;
1145 case EXCEPTION_PRIV_INSTRUCTION:
1146 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_PRIV_INSTRUCTION");
1147 ourstatus->value.sig = TARGET_SIGNAL_ILL;
1149 case EXCEPTION_NONCONTINUABLE_EXCEPTION:
1150 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_NONCONTINUABLE_EXCEPTION");
1151 ourstatus->value.sig = TARGET_SIGNAL_ILL;
1154 if (current_event.u.Exception.dwFirstChance)
1156 printf_unfiltered ("gdb: unknown target exception 0x%08lx at 0x%08lx\n",
1157 current_event.u.Exception.ExceptionRecord.ExceptionCode,
1158 (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress);
1159 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
1163 last_sig = ourstatus->value.sig;
1167 /* Resume all artificially suspended threads if we are continuing
1170 child_continue (DWORD continue_status, int id)
1176 DEBUG_EVENTS (("ContinueDebugEvent (cpid=%ld, ctid=%ld, %s);\n",
1177 current_event.dwProcessId, current_event.dwThreadId,
1178 continue_status == DBG_CONTINUE ?
1179 "DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED"));
1180 res = ContinueDebugEvent (current_event.dwProcessId,
1181 current_event.dwThreadId,
1183 continue_status = 0;
1185 for (th = &thread_head; (th = th->next) != NULL;)
1186 if (((id == -1) || (id == (int) th->id)) && th->suspend_count)
1189 for (i = 0; i < th->suspend_count; i++)
1190 (void) ResumeThread (th->h);
1191 th->suspend_count = 0;
1192 if (debug_registers_changed)
1194 /* Only change the value of the debug registers */
1195 th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS;
1196 th->context.Dr0 = dr[0];
1197 th->context.Dr1 = dr[1];
1198 th->context.Dr2 = dr[2];
1199 th->context.Dr3 = dr[3];
1200 /* th->context.Dr6 = dr[6];
1201 FIXME: should we set dr6 also ?? */
1202 th->context.Dr7 = dr[7];
1203 CHECK (SetThreadContext (th->h, &th->context));
1204 th->context.ContextFlags = 0;
1208 debug_registers_changed = 0;
1212 /* Called in pathological case where Windows fails to send a
1213 CREATE_PROCESS_DEBUG_EVENT after an attach. */
1215 fake_create_process (void)
1217 current_process_handle = OpenProcess (PROCESS_ALL_ACCESS, FALSE,
1218 current_event.dwProcessId);
1219 main_thread_id = current_event.dwThreadId;
1220 current_thread = child_add_thread (main_thread_id,
1221 current_event.u.CreateThread.hThread);
1222 return main_thread_id;
1225 /* Get the next event from the child. Return 1 if the event requires
1226 handling by WFI (or whatever).
1229 get_child_debug_event (int pid, struct target_waitstatus *ourstatus)
1232 DWORD continue_status, event_code;
1234 static thread_info dummy_thread_info;
1237 last_sig = TARGET_SIGNAL_0;
1239 if (!(debug_event = WaitForDebugEvent (¤t_event, 1000)))
1243 continue_status = DBG_CONTINUE;
1245 event_code = current_event.dwDebugEventCode;
1246 ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
1251 case CREATE_THREAD_DEBUG_EVENT:
1252 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%x code=%s)\n",
1253 (unsigned) current_event.dwProcessId,
1254 (unsigned) current_event.dwThreadId,
1255 "CREATE_THREAD_DEBUG_EVENT"));
1256 if (saw_create != 1)
1258 if (!saw_create && attach_flag)
1260 /* Kludge around a Windows bug where first event is a create
1261 thread event. Caused when attached process does not have
1263 retval = ourstatus->value.related_pid = fake_create_process ();
1268 /* Record the existence of this thread */
1269 th = child_add_thread (current_event.dwThreadId,
1270 current_event.u.CreateThread.hThread);
1272 printf_unfiltered ("[New %s]\n",
1274 pid_to_ptid (current_event.dwThreadId)));
1275 retval = current_event.dwThreadId;
1278 case EXIT_THREAD_DEBUG_EVENT:
1279 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1280 (unsigned) current_event.dwProcessId,
1281 (unsigned) current_event.dwThreadId,
1282 "EXIT_THREAD_DEBUG_EVENT"));
1283 if (current_event.dwThreadId != main_thread_id)
1285 child_delete_thread (current_event.dwThreadId);
1286 th = &dummy_thread_info;
1290 case CREATE_PROCESS_DEBUG_EVENT:
1291 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1292 (unsigned) current_event.dwProcessId,
1293 (unsigned) current_event.dwThreadId,
1294 "CREATE_PROCESS_DEBUG_EVENT"));
1295 CloseHandle (current_event.u.CreateProcessInfo.hFile);
1296 if (++saw_create != 1)
1298 CloseHandle (current_event.u.CreateProcessInfo.hProcess);
1302 current_process_handle = current_event.u.CreateProcessInfo.hProcess;
1304 child_delete_thread (main_thread_id);
1305 main_thread_id = current_event.dwThreadId;
1306 /* Add the main thread */
1307 th = child_add_thread (main_thread_id,
1308 current_event.u.CreateProcessInfo.hThread);
1309 retval = ourstatus->value.related_pid = current_event.dwThreadId;
1312 case EXIT_PROCESS_DEBUG_EVENT:
1313 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1314 (unsigned) current_event.dwProcessId,
1315 (unsigned) current_event.dwThreadId,
1316 "EXIT_PROCESS_DEBUG_EVENT"));
1317 if (saw_create != 1)
1319 ourstatus->kind = TARGET_WAITKIND_EXITED;
1320 ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode;
1321 CloseHandle (current_process_handle);
1322 retval = main_thread_id;
1325 case LOAD_DLL_DEBUG_EVENT:
1326 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1327 (unsigned) current_event.dwProcessId,
1328 (unsigned) current_event.dwThreadId,
1329 "LOAD_DLL_DEBUG_EVENT"));
1330 CloseHandle (current_event.u.LoadDll.hFile);
1331 if (saw_create != 1)
1333 catch_errors (handle_load_dll, NULL, (char *) "", RETURN_MASK_ALL);
1334 registers_changed (); /* mark all regs invalid */
1335 ourstatus->kind = TARGET_WAITKIND_LOADED;
1336 ourstatus->value.integer = 0;
1337 retval = main_thread_id;
1338 re_enable_breakpoints_in_shlibs ();
1341 case UNLOAD_DLL_DEBUG_EVENT:
1342 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1343 (unsigned) current_event.dwProcessId,
1344 (unsigned) current_event.dwThreadId,
1345 "UNLOAD_DLL_DEBUG_EVENT"));
1346 if (saw_create != 1)
1348 catch_errors (handle_unload_dll, NULL, (char *) "", RETURN_MASK_ALL);
1349 registers_changed (); /* mark all regs invalid */
1350 /* ourstatus->kind = TARGET_WAITKIND_UNLOADED;
1351 does not exist yet. */
1354 case EXCEPTION_DEBUG_EVENT:
1355 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1356 (unsigned) current_event.dwProcessId,
1357 (unsigned) current_event.dwThreadId,
1358 "EXCEPTION_DEBUG_EVENT"));
1359 if (saw_create != 1)
1361 if (handle_exception (ourstatus))
1362 retval = current_event.dwThreadId;
1365 case OUTPUT_DEBUG_STRING_EVENT: /* message from the kernel */
1366 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1367 (unsigned) current_event.dwProcessId,
1368 (unsigned) current_event.dwThreadId,
1369 "OUTPUT_DEBUG_STRING_EVENT"));
1370 if (saw_create != 1)
1372 if (handle_output_debug_string (ourstatus))
1373 retval = main_thread_id;
1377 if (saw_create != 1)
1379 printf_unfiltered ("gdb: kernel event for pid=%ld tid=%ld\n",
1380 (DWORD) current_event.dwProcessId,
1381 (DWORD) current_event.dwThreadId);
1382 printf_unfiltered (" unknown event code %ld\n",
1383 current_event.dwDebugEventCode);
1387 if (!retval || saw_create != 1)
1388 CHECK (child_continue (continue_status, -1));
1391 inferior_ptid = pid_to_ptid (retval);
1392 current_thread = th ?: thread_rec (current_event.dwThreadId, TRUE);
1399 /* Wait for interesting events to occur in the target process. */
1401 child_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
1403 int pid = PIDGET (ptid);
1405 /* We loop when we get a non-standard exception rather than return
1406 with a SPURIOUS because resume can try and step or modify things,
1407 which needs a current_thread->h. But some of these exceptions mark
1408 the birth or death of threads, which mean that the current thread
1409 isn't necessarily what you think it is. */
1413 int retval = get_child_debug_event (pid, ourstatus);
1415 return pid_to_ptid (retval);
1420 if (deprecated_ui_loop_hook != NULL)
1421 detach = deprecated_ui_loop_hook (0);
1424 child_kill_inferior ();
1430 do_initial_child_stuff (DWORD pid)
1432 extern int stop_after_trap;
1435 last_sig = TARGET_SIGNAL_0;
1437 exception_count = 0;
1438 debug_registers_changed = 0;
1439 debug_registers_used = 0;
1440 for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++)
1442 current_event.dwProcessId = pid;
1443 memset (¤t_event, 0, sizeof (current_event));
1444 push_target (&deprecated_child_ops);
1445 child_init_thread_list ();
1446 disable_breakpoints_in_shlibs (1);
1447 child_clear_solibs ();
1448 clear_proceed_status ();
1449 init_wait_for_inferior ();
1451 target_terminal_init ();
1452 target_terminal_inferior ();
1456 stop_after_trap = 1;
1457 wait_for_inferior ();
1458 if (stop_signal != TARGET_SIGNAL_TRAP)
1459 resume (0, stop_signal);
1463 stop_after_trap = 0;
1467 /* Since Windows XP, detaching from a process is supported by Windows.
1468 The following code tries loading the appropriate functions dynamically.
1469 If loading these functions succeeds use them to actually detach from
1470 the inferior process, otherwise behave as usual, pretending that
1471 detach has worked. */
1472 static BOOL WINAPI (*DebugSetProcessKillOnExit)(BOOL);
1473 static BOOL WINAPI (*DebugActiveProcessStop)(DWORD);
1476 has_detach_ability (void)
1478 static HMODULE kernel32 = NULL;
1481 kernel32 = LoadLibrary ("kernel32.dll");
1484 if (!DebugSetProcessKillOnExit)
1485 DebugSetProcessKillOnExit = GetProcAddress (kernel32,
1486 "DebugSetProcessKillOnExit");
1487 if (!DebugActiveProcessStop)
1488 DebugActiveProcessStop = GetProcAddress (kernel32,
1489 "DebugActiveProcessStop");
1490 if (DebugSetProcessKillOnExit && DebugActiveProcessStop)
1496 /* Try to set or remove a user privilege to the current process. Return -1
1497 if that fails, the previous setting of that privilege otherwise.
1499 This code is copied from the Cygwin source code and rearranged to allow
1500 dynamically loading of the needed symbols from advapi32 which is only
1501 available on NT/2K/XP. */
1503 set_process_privilege (const char *privilege, BOOL enable)
1505 static HMODULE advapi32 = NULL;
1506 static BOOL WINAPI (*OpenProcessToken)(HANDLE, DWORD, PHANDLE);
1507 static BOOL WINAPI (*LookupPrivilegeValue)(LPCSTR, LPCSTR, PLUID);
1508 static BOOL WINAPI (*AdjustTokenPrivileges)(HANDLE, BOOL, PTOKEN_PRIVILEGES,
1509 DWORD, PTOKEN_PRIVILEGES, PDWORD);
1511 HANDLE token_hdl = NULL;
1513 TOKEN_PRIVILEGES new_priv, orig_priv;
1517 if (GetVersion () >= 0x80000000) /* No security availbale on 9x/Me */
1522 if (!(advapi32 = LoadLibrary ("advapi32.dll")))
1524 if (!OpenProcessToken)
1525 OpenProcessToken = GetProcAddress (advapi32, "OpenProcessToken");
1526 if (!LookupPrivilegeValue)
1527 LookupPrivilegeValue = GetProcAddress (advapi32,
1528 "LookupPrivilegeValueA");
1529 if (!AdjustTokenPrivileges)
1530 AdjustTokenPrivileges = GetProcAddress (advapi32,
1531 "AdjustTokenPrivileges");
1532 if (!OpenProcessToken || !LookupPrivilegeValue || !AdjustTokenPrivileges)
1539 if (!OpenProcessToken (GetCurrentProcess (),
1540 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
1544 if (!LookupPrivilegeValue (NULL, privilege, &restore_priv))
1547 new_priv.PrivilegeCount = 1;
1548 new_priv.Privileges[0].Luid = restore_priv;
1549 new_priv.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED : 0;
1551 if (!AdjustTokenPrivileges (token_hdl, FALSE, &new_priv,
1552 sizeof orig_priv, &orig_priv, &size))
1555 /* Disabled, otherwise every `attach' in an unprivileged user session
1556 would raise the "Failed to get SE_DEBUG_NAME privilege" warning in
1558 /* AdjustTokenPrivileges returns TRUE even if the privilege could not
1559 be enabled. GetLastError () returns an correct error code, though. */
1560 if (enable && GetLastError () == ERROR_NOT_ALL_ASSIGNED)
1564 ret = orig_priv.Privileges[0].Attributes == SE_PRIVILEGE_ENABLED ? 1 : 0;
1568 CloseHandle (token_hdl);
1573 /* Attach to process PID, then initialize for debugging it. */
1575 child_attach (char *args, int from_tty)
1581 error_no_arg (_("process-id to attach"));
1583 if (set_process_privilege (SE_DEBUG_NAME, TRUE) < 0)
1585 printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n");
1586 printf_unfiltered ("This can cause attach to fail on Windows NT/2K/XP\n");
1589 pid = strtoul (args, 0, 0); /* Windows pid */
1591 ok = DebugActiveProcess (pid);
1596 /* Try fall back to Cygwin pid */
1597 pid = cygwin_internal (CW_CYGWIN_PID_TO_WINPID, pid);
1600 ok = DebugActiveProcess (pid);
1603 error (_("Can't attach to process."));
1606 if (has_detach_ability ())
1607 DebugSetProcessKillOnExit (FALSE);
1613 char *exec_file = (char *) get_exec_file (0);
1616 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file,
1617 target_pid_to_str (pid_to_ptid (pid)));
1619 printf_unfiltered ("Attaching to %s\n",
1620 target_pid_to_str (pid_to_ptid (pid)));
1622 gdb_flush (gdb_stdout);
1625 do_initial_child_stuff (pid);
1626 target_terminal_ours ();
1630 child_detach (char *args, int from_tty)
1634 if (has_detach_ability ())
1636 delete_command (NULL, 0);
1637 child_continue (DBG_CONTINUE, -1);
1638 if (!DebugActiveProcessStop (current_event.dwProcessId))
1640 error (_("Can't detach process %lu (error %lu)"),
1641 current_event.dwProcessId, GetLastError ());
1644 DebugSetProcessKillOnExit (FALSE);
1646 if (detached && from_tty)
1648 char *exec_file = get_exec_file (0);
1651 printf_unfiltered ("Detaching from program: %s, Pid %lu\n", exec_file,
1652 current_event.dwProcessId);
1653 gdb_flush (gdb_stdout);
1655 inferior_ptid = null_ptid;
1656 unpush_target (&deprecated_child_ops);
1660 child_pid_to_exec_file (int pid)
1662 /* Try to find the process path using the Cygwin internal process list
1663 pid isn't a valid pid, unfortunately. Use current_event.dwProcessId
1665 /* TODO: Also find native Windows processes using CW_GETPINFO_FULL. */
1667 static char path[MAX_PATH + 1];
1668 char *path_ptr = NULL;
1670 struct external_pinfo *pinfo;
1672 cygwin_internal (CW_LOCK_PINFO, 1000);
1674 (pinfo = (struct external_pinfo *)
1675 cygwin_internal (CW_GETPINFO, cpid | CW_NEXTPID));
1678 if (pinfo->dwProcessId == current_event.dwProcessId) /* Got it */
1680 cygwin_conv_to_full_posix_path (pinfo->progname, path);
1685 cygwin_internal (CW_UNLOCK_PINFO);
1689 /* Print status information about what we're accessing. */
1692 child_files_info (struct target_ops *ignore)
1694 printf_unfiltered ("\tUsing the running image of %s %s.\n",
1695 attach_flag ? "attached" : "child", target_pid_to_str (inferior_ptid));
1699 child_open (char *arg, int from_tty)
1701 error (_("Use the \"run\" command to start a Unix child process."));
1704 /* Start an inferior win32 child process and sets inferior_ptid to its pid.
1705 EXEC_FILE is the file to run.
1706 ALLARGS is a string containing the arguments to the program.
1707 ENV is the environment vector to pass. Errors reported with error(). */
1710 child_create_inferior (char *exec_file, char *allargs, char **env,
1718 PROCESS_INFORMATION pi;
1722 char real_path[MAXPATHLEN];
1724 char shell[MAX_PATH + 1]; /* Path to shell */
1727 int ostdin, ostdout, ostderr;
1730 error (_("No executable specified, use `target exec'."));
1732 memset (&si, 0, sizeof (si));
1733 si.cb = sizeof (si);
1737 flags = DEBUG_ONLY_THIS_PROCESS;
1738 cygwin_conv_to_win32_path (exec_file, real_path);
1744 sh = getenv ("SHELL");
1747 cygwin_conv_to_win32_path (sh, shell);
1748 newallargs = alloca (sizeof (" -c 'exec '") + strlen (exec_file)
1749 + strlen (allargs) + 2);
1750 sprintf (newallargs, " -c 'exec %s %s'", exec_file, allargs);
1751 allargs = newallargs;
1753 flags = DEBUG_PROCESS;
1757 flags |= CREATE_NEW_PROCESS_GROUP;
1760 flags |= CREATE_NEW_CONSOLE;
1764 args = alloca (strlen (toexec) + strlen (allargs) + 2);
1765 strcpy (args, toexec);
1767 strcat (args, allargs);
1769 /* Prepare the environment vars for CreateProcess. */
1771 /* This code used to assume all env vars were file names and would
1772 translate them all to win32 style. That obviously doesn't work in the
1773 general case. The current rule is that we only translate PATH.
1774 We need to handle PATH because we're about to call CreateProcess and
1775 it uses PATH to find DLL's. Fortunately PATH has a well-defined value
1776 in both posix and win32 environments. cygwin.dll will change it back
1777 to posix style if necessary. */
1779 static const char *conv_path_names[] =
1785 /* CreateProcess takes the environment list as a null terminated set of
1786 strings (i.e. two nulls terminate the list). */
1788 /* Get total size for env strings. */
1789 for (envlen = 0, i = 0; env[i] && *env[i]; i++)
1793 for (j = 0; conv_path_names[j]; j++)
1795 len = strlen (conv_path_names[j]);
1796 if (strncmp (conv_path_names[j], env[i], len) == 0)
1798 if (cygwin_posix_path_list_p (env[i] + len))
1800 + cygwin_posix_to_win32_path_list_buf_size (env[i] + len);
1802 envlen += strlen (env[i]) + 1;
1806 if (conv_path_names[j] == NULL)
1807 envlen += strlen (env[i]) + 1;
1810 winenv = alloca (envlen + 1);
1812 /* Copy env strings into new buffer. */
1813 for (temp = winenv, i = 0; env[i] && *env[i]; i++)
1817 for (j = 0; conv_path_names[j]; j++)
1819 len = strlen (conv_path_names[j]);
1820 if (strncmp (conv_path_names[j], env[i], len) == 0)
1822 if (cygwin_posix_path_list_p (env[i] + len))
1824 memcpy (temp, env[i], len);
1825 cygwin_posix_to_win32_path_list (env[i] + len, temp + len);
1828 strcpy (temp, env[i]);
1832 if (conv_path_names[j] == NULL)
1833 strcpy (temp, env[i]);
1835 temp += strlen (temp) + 1;
1838 /* Final nil string to terminate new env. */
1842 if (!inferior_io_terminal)
1843 tty = ostdin = ostdout = ostderr = -1;
1846 tty = open (inferior_io_terminal, O_RDWR | O_NOCTTY);
1849 print_sys_errmsg (inferior_io_terminal, errno);
1850 ostdin = ostdout = ostderr = -1;
1863 ret = CreateProcess (0,
1864 args, /* command line */
1865 NULL, /* Security */
1867 TRUE, /* inherit handles */
1868 flags, /* start flags */
1870 NULL, /* current directory */
1885 error (_("Error creating process %s, (error %d)."),
1886 exec_file, (unsigned) GetLastError ());
1888 CloseHandle (pi.hThread);
1889 CloseHandle (pi.hProcess);
1891 if (useshell && shell[0] != '\0')
1896 do_initial_child_stuff (pi.dwProcessId);
1898 /* child_continue (DBG_CONTINUE, -1); */
1899 proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_0, 0);
1903 child_mourn_inferior (void)
1905 (void) child_continue (DBG_CONTINUE, -1);
1906 i386_cleanup_dregs();
1907 unpush_target (&deprecated_child_ops);
1908 generic_mourn_inferior ();
1911 /* Send a SIGINT to the process group. This acts just like the user typed a
1912 ^C on the controlling terminal. */
1917 DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n"));
1918 CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId));
1919 registers_changed (); /* refresh register state */
1923 child_xfer_memory (CORE_ADDR memaddr, char *our, int len,
1924 int write, struct mem_attrib *mem,
1925 struct target_ops *target)
1930 DEBUG_MEM (("gdb: write target memory, %d bytes at 0x%08lx\n",
1931 len, (DWORD) memaddr));
1932 if (!WriteProcessMemory (current_process_handle, (LPVOID) memaddr, our,
1935 FlushInstructionCache (current_process_handle, (LPCVOID) memaddr, len);
1939 DEBUG_MEM (("gdb: read target memory, %d bytes at 0x%08lx\n",
1940 len, (DWORD) memaddr));
1941 if (!ReadProcessMemory (current_process_handle, (LPCVOID) memaddr, our,
1949 child_kill_inferior (void)
1951 CHECK (TerminateProcess (current_process_handle, 0));
1955 if (!child_continue (DBG_CONTINUE, -1))
1957 if (!WaitForDebugEvent (¤t_event, INFINITE))
1959 if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT)
1963 CHECK (CloseHandle (current_process_handle));
1965 /* this may fail in an attached process so don't check. */
1966 if (current_thread && current_thread->h)
1967 (void) CloseHandle (current_thread->h);
1968 target_mourn_inferior (); /* or just child_mourn_inferior? */
1972 child_resume (ptid_t ptid, int step, enum target_signal sig)
1975 DWORD continue_status = DBG_CONTINUE;
1977 int pid = PIDGET (ptid);
1979 if (sig != TARGET_SIGNAL_0)
1981 if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT)
1983 DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig));
1985 else if (sig == last_sig)
1986 continue_status = DBG_EXCEPTION_NOT_HANDLED;
1989 /* This code does not seem to work, because
1990 the kernel does probably not consider changes in the ExceptionRecord
1991 structure when passing the exception to the inferior.
1992 Note that this seems possible in the exception handler itself. */
1995 for (i = 0; xlate[i].them != -1; i++)
1996 if (xlate[i].us == sig)
1998 current_event.u.Exception.ExceptionRecord.ExceptionCode =
2000 continue_status = DBG_EXCEPTION_NOT_HANDLED;
2003 if (continue_status == DBG_CONTINUE)
2005 DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig));
2009 DEBUG_EXCEPT(("Can only continue with recieved signal %d.\n",
2013 last_sig = TARGET_SIGNAL_0;
2015 DEBUG_EXEC (("gdb: child_resume (pid=%d, step=%d, sig=%d);\n",
2018 /* Get context for currently selected thread */
2019 th = thread_rec (current_event.dwThreadId, FALSE);
2024 /* Single step by setting t bit */
2025 child_fetch_inferior_registers (PS_REGNUM);
2026 th->context.EFlags |= FLAG_TRACE_BIT;
2029 if (th->context.ContextFlags)
2031 if (debug_registers_changed)
2033 th->context.Dr0 = dr[0];
2034 th->context.Dr1 = dr[1];
2035 th->context.Dr2 = dr[2];
2036 th->context.Dr3 = dr[3];
2037 /* th->context.Dr6 = dr[6];
2038 FIXME: should we set dr6 also ?? */
2039 th->context.Dr7 = dr[7];
2041 CHECK (SetThreadContext (th->h, &th->context));
2042 th->context.ContextFlags = 0;
2046 /* Allow continuing with the same signal that interrupted us.
2047 Otherwise complain. */
2049 child_continue (continue_status, pid);
2053 child_prepare_to_store (void)
2055 /* Do nothing, since we can store individual regs */
2059 child_can_run (void)
2067 DEBUG_EVENTS (("gdb: child_close, inferior_ptid=%d\n",
2068 PIDGET (inferior_ptid)));
2072 init_child_ops (void)
2074 deprecated_child_ops.to_shortname = "child";
2075 deprecated_child_ops.to_longname = "Win32 child process";
2076 deprecated_child_ops.to_doc = "Win32 child process (started by the \"run\" command).";
2077 deprecated_child_ops.to_open = child_open;
2078 deprecated_child_ops.to_close = child_close;
2079 deprecated_child_ops.to_attach = child_attach;
2080 deprecated_child_ops.to_detach = child_detach;
2081 deprecated_child_ops.to_resume = child_resume;
2082 deprecated_child_ops.to_wait = child_wait;
2083 deprecated_child_ops.to_fetch_registers = child_fetch_inferior_registers;
2084 deprecated_child_ops.to_store_registers = child_store_inferior_registers;
2085 deprecated_child_ops.to_prepare_to_store = child_prepare_to_store;
2086 deprecated_child_ops.deprecated_xfer_memory = child_xfer_memory;
2087 deprecated_child_ops.to_files_info = child_files_info;
2088 deprecated_child_ops.to_insert_breakpoint = memory_insert_breakpoint;
2089 deprecated_child_ops.to_remove_breakpoint = memory_remove_breakpoint;
2090 deprecated_child_ops.to_terminal_init = terminal_init_inferior;
2091 deprecated_child_ops.to_terminal_inferior = terminal_inferior;
2092 deprecated_child_ops.to_terminal_ours_for_output = terminal_ours_for_output;
2093 deprecated_child_ops.to_terminal_ours = terminal_ours;
2094 deprecated_child_ops.to_terminal_save_ours = terminal_save_ours;
2095 deprecated_child_ops.to_terminal_info = child_terminal_info;
2096 deprecated_child_ops.to_kill = child_kill_inferior;
2097 deprecated_child_ops.to_create_inferior = child_create_inferior;
2098 deprecated_child_ops.to_mourn_inferior = child_mourn_inferior;
2099 deprecated_child_ops.to_can_run = child_can_run;
2100 deprecated_child_ops.to_thread_alive = win32_child_thread_alive;
2101 deprecated_child_ops.to_pid_to_str = cygwin_pid_to_str;
2102 deprecated_child_ops.to_stop = child_stop;
2103 deprecated_child_ops.to_stratum = process_stratum;
2104 deprecated_child_ops.to_has_all_memory = 1;
2105 deprecated_child_ops.to_has_memory = 1;
2106 deprecated_child_ops.to_has_stack = 1;
2107 deprecated_child_ops.to_has_registers = 1;
2108 deprecated_child_ops.to_has_execution = 1;
2109 deprecated_child_ops.to_magic = OPS_MAGIC;
2110 deprecated_child_ops.to_pid_to_exec_file = child_pid_to_exec_file;
2114 _initialize_win32_nat (void)
2116 struct cmd_list_element *c;
2120 c = add_com ("dll-symbols", class_files, dll_symbol_command,
2121 _("Load dll library symbols from FILE."));
2122 set_cmd_completer (c, filename_completer);
2124 add_com_alias ("sharedlibrary", "dll-symbols", class_alias, 1);
2126 add_setshow_boolean_cmd ("shell", class_support, &useshell, _("\
2127 Set use of shell to start subprocess."), _("\
2128 Show use of shell to start subprocess."), NULL,
2130 NULL, /* FIXME: i18n: */
2131 &setlist, &showlist);
2133 add_setshow_boolean_cmd ("new-console", class_support, &new_console, _("\
2134 Set creation of new console when creating child process."), _("\
2135 Show creation of new console when creating child process."), NULL,
2137 NULL, /* FIXME: i18n: */
2138 &setlist, &showlist);
2140 add_setshow_boolean_cmd ("new-group", class_support, &new_group, _("\
2141 Set creation of new group when creating child process."), _("\
2142 Show creation of new group when creating child process."), NULL,
2144 NULL, /* FIXME: i18n: */
2145 &setlist, &showlist);
2147 add_setshow_boolean_cmd ("debugexec", class_support, &debug_exec, _("\
2148 Set whether to display execution in child process."), _("\
2149 Show whether to display execution in child process."), NULL,
2151 NULL, /* FIXME: i18n: */
2152 &setlist, &showlist);
2154 add_setshow_boolean_cmd ("debugevents", class_support, &debug_events, _("\
2155 Set whether to display kernel events in child process."), _("\
2156 Show whether to display kernel events in child process."), NULL,
2158 NULL, /* FIXME: i18n: */
2159 &setlist, &showlist);
2161 add_setshow_boolean_cmd ("debugmemory", class_support, &debug_memory, _("\
2162 Set whether to display memory accesses in child process."), _("\
2163 Show whether to display memory accesses in child process."), NULL,
2165 NULL, /* FIXME: i18n: */
2166 &setlist, &showlist);
2168 add_setshow_boolean_cmd ("debugexceptions", class_support,
2169 &debug_exceptions, _("\
2170 Set whether to display kernel exceptions in child process."), _("\
2171 Show whether to display kernel exceptions in child process."), NULL,
2173 NULL, /* FIXME: i18n: */
2174 &setlist, &showlist);
2176 add_info ("dll", info_dll_command, _("Status of loaded DLLs."));
2177 add_info_alias ("sharedlibrary", "dll", 1);
2179 add_prefix_cmd ("w32", class_info, info_w32_command,
2180 _("Print information specific to Win32 debugging."),
2181 &info_w32_cmdlist, "info w32 ", 0, &infolist);
2183 add_cmd ("selector", class_info, display_selectors,
2184 _("Display selectors infos."),
2187 add_target (&deprecated_child_ops);
2190 /* Hardware watchpoint support, adapted from go32-nat.c code. */
2192 /* Pass the address ADDR to the inferior in the I'th debug register.
2193 Here we just store the address in dr array, the registers will be
2194 actually set up when child_continue is called. */
2196 cygwin_set_dr (int i, CORE_ADDR addr)
2199 internal_error (__FILE__, __LINE__,
2200 _("Invalid register %d in cygwin_set_dr.\n"), i);
2201 dr[i] = (unsigned) addr;
2202 debug_registers_changed = 1;
2203 debug_registers_used = 1;
2206 /* Pass the value VAL to the inferior in the DR7 debug control
2207 register. Here we just store the address in D_REGS, the watchpoint
2208 will be actually set up in child_wait. */
2210 cygwin_set_dr7 (unsigned val)
2213 debug_registers_changed = 1;
2214 debug_registers_used = 1;
2217 /* Get the value of the DR6 debug status register from the inferior.
2218 Here we just return the value stored in dr[6]
2219 by the last call to thread_rec for current_event.dwThreadId id. */
2221 cygwin_get_dr6 (void)
2226 /* Determine if the thread referenced by "pid" is alive
2227 by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
2228 it means that the pid has died. Otherwise it is assumed to be alive. */
2230 win32_child_thread_alive (ptid_t ptid)
2232 int pid = PIDGET (ptid);
2234 return WaitForSingleObject (thread_rec (pid, FALSE)->h, 0) == WAIT_OBJECT_0 ?
2238 /* Convert pid to printable format. */
2240 cygwin_pid_to_str (ptid_t ptid)
2242 static char buf[80];
2243 int pid = PIDGET (ptid);
2245 if ((DWORD) pid == current_event.dwProcessId)
2246 sprintf (buf, "process %d", pid);
2248 sprintf (buf, "thread %ld.0x%x", current_event.dwProcessId, pid);
2253 core_dll_symbols_add (char *dll_name, DWORD base_addr)
2255 struct objfile *objfile;
2256 char *objfile_basename;
2257 const char *dll_basename;
2259 if (!(dll_basename = strrchr (dll_name, '/')))
2260 dll_basename = dll_name;
2264 ALL_OBJFILES (objfile)
2266 objfile_basename = strrchr (objfile->name, '/');
2268 if (objfile_basename &&
2269 strcmp (dll_basename, objfile_basename + 1) == 0)
2271 printf_unfiltered ("%08lx:%s (symbols previously loaded)\n",
2272 base_addr, dll_name);
2277 register_loaded_dll (dll_name, base_addr + 0x1000);
2278 solib_symbols_add (dll_name, 0, (CORE_ADDR) base_addr + 0x1000);
2286 struct target_ops *target;
2288 } map_code_section_args;
2291 map_single_dll_code_section (bfd * abfd, asection * sect, void *obj)
2295 struct section_table *new_target_sect_ptr;
2297 map_code_section_args *args = (map_code_section_args *) obj;
2298 struct target_ops *target = args->target;
2299 if (sect->flags & SEC_CODE)
2301 update_coreops = core_ops.to_sections == target->to_sections;
2303 if (target->to_sections)
2305 old = target->to_sections_end - target->to_sections;
2306 target->to_sections = (struct section_table *)
2307 xrealloc ((char *) target->to_sections,
2308 (sizeof (struct section_table)) * (1 + old));
2313 target->to_sections = (struct section_table *)
2314 xmalloc ((sizeof (struct section_table)));
2316 target->to_sections_end = target->to_sections + (1 + old);
2318 /* Update the to_sections field in the core_ops structure
2322 core_ops.to_sections = target->to_sections;
2323 core_ops.to_sections_end = target->to_sections_end;
2325 new_target_sect_ptr = target->to_sections + old;
2326 new_target_sect_ptr->addr = args->addr + bfd_section_vma (abfd, sect);
2327 new_target_sect_ptr->endaddr = args->addr + bfd_section_vma (abfd, sect) +
2328 bfd_section_size (abfd, sect);;
2329 new_target_sect_ptr->the_bfd_section = sect;
2330 new_target_sect_ptr->bfd = abfd;
2335 dll_code_sections_add (const char *dll_name, int base_addr, struct target_ops *target)
2338 map_code_section_args map_args;
2339 asection *lowest_sect;
2341 if (dll_name == NULL || target == NULL)
2343 name = xstrdup (dll_name);
2344 dll_bfd = bfd_openr (name, "pei-i386");
2345 if (dll_bfd == NULL)
2348 if (bfd_check_format (dll_bfd, bfd_object))
2350 lowest_sect = bfd_get_section_by_name (dll_bfd, ".text");
2351 if (lowest_sect == NULL)
2353 map_args.target = target;
2354 map_args.addr = base_addr - bfd_section_vma (dll_bfd, lowest_sect);
2356 bfd_map_over_sections (dll_bfd, &map_single_dll_code_section, (void *) (&map_args));
2363 core_section_load_dll_symbols (bfd * abfd, asection * sect, void *obj)
2365 struct target_ops *target = (struct target_ops *) obj;
2370 char *dll_name = NULL;
2372 struct win32_pstatus *pstatus;
2375 if (strncmp (sect->name, ".module", 7))
2378 buf = (char *) xmalloc (bfd_get_section_size (sect) + 1);
2381 printf_unfiltered ("memory allocation failed for %s\n", sect->name);
2384 if (!bfd_get_section_contents (abfd, sect, buf, 0, bfd_get_section_size (sect)))
2387 pstatus = (struct win32_pstatus *) buf;
2389 memmove (&base_addr, &(pstatus->data.module_info.base_address), sizeof (base_addr));
2390 dll_name_size = pstatus->data.module_info.module_name_size;
2391 if (offsetof (struct win32_pstatus, data.module_info.module_name) + dll_name_size > bfd_get_section_size (sect))
2394 dll_name = (char *) xmalloc (dll_name_size + 1);
2397 printf_unfiltered ("memory allocation failed for %s\n", sect->name);
2400 strncpy (dll_name, pstatus->data.module_info.module_name, dll_name_size);
2402 while ((p = strchr (dll_name, '\\')))
2405 if (!core_dll_symbols_add (dll_name, (DWORD) base_addr))
2406 printf_unfiltered ("%s: Failed to load dll symbols.\n", dll_name);
2408 if (!dll_code_sections_add (dll_name, (DWORD) base_addr + 0x1000, target))
2409 printf_unfiltered ("%s: Failed to map dll code sections.\n", dll_name);
2420 child_solib_add (char *filename, int from_tty, struct target_ops *target,
2427 child_clear_solibs ();
2428 bfd_map_over_sections (core_bfd, &core_section_load_dll_symbols, target);
2432 if (solib_end && solib_end->name)
2433 solib_end->objfile = solib_symbols_add (solib_end->name, from_tty,
2434 solib_end->load_addr);
2439 fetch_elf_core_registers (char *core_reg_sect,
2440 unsigned core_reg_size,
2445 if (core_reg_size < sizeof (CONTEXT))
2447 error (_("Core file register section too small (%u bytes)."), core_reg_size);
2450 for (r = 0; r < NUM_REGS; r++)
2451 regcache_raw_supply (current_regcache, r, core_reg_sect + mappings[r]);
2454 static struct core_fns win32_elf_core_fns =
2456 bfd_target_elf_flavour,
2457 default_check_format,
2458 default_core_sniffer,
2459 fetch_elf_core_registers,
2464 _initialize_core_win32 (void)
2466 deprecated_add_core_fns (&win32_elf_core_fns);
2470 _initialize_check_for_gdb_ini (void)
2473 if (inhibit_gdbinit)
2476 homedir = getenv ("HOME");
2480 char *oldini = (char *) alloca (strlen (homedir) +
2481 sizeof ("/gdb.ini"));
2482 strcpy (oldini, homedir);
2483 p = strchr (oldini, '\0');
2484 if (p > oldini && p[-1] != '/')
2486 strcpy (p, "gdb.ini");
2487 if (access (oldini, 0) == 0)
2489 int len = strlen (oldini);
2490 char *newini = alloca (len + 1);
2491 sprintf (newini, "%.*s.gdbinit",
2492 (int) (len - (sizeof ("gdb.ini") - 1)), oldini);
2493 warning (_("obsolete '%s' found. Rename to '%s'."), oldini, newini);