1 /* Target-vector operations for controlling win32 child processes, for GDB.
3 Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free
4 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 "tm.h" /* required for SSE registers */
31 #include "frame.h" /* required by inferior.h */
36 #include "completer.h"
39 #include "i386-tdep.h"
41 #include <sys/types.h>
46 #include <sys/cygwin.h>
51 #include "gdb_string.h"
52 #include "gdbthread.h"
54 #include <sys/param.h>
57 /* The ui's event loop. */
58 extern int (*ui_loop_hook) (int signo);
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>
74 #define CONTEXT_DEBUGGER_DR CONTEXT_DEBUGGER | CONTEXT_DEBUG_REGISTERS \
75 | CONTEXT_EXTENDED_REGISTERS
77 #define CONTEXT_DEBUGGER_DR CONTEXT_DEBUGGER | CONTEXT_DEBUG_REGISTERS
80 static unsigned dr[8];
81 static int debug_registers_changed = 0;
82 static int debug_registers_used = 0;
84 /* The string sent by cygwin when it processes a signal.
85 FIXME: This should be in a cygwin include file. */
86 #define CYGWIN_SIGNAL_STRING "cygwin: signal"
88 #define CHECK(x) check (x, __FILE__,__LINE__)
89 #define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x
90 #define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x
91 #define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x
92 #define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x
94 /* Forward declaration */
95 extern struct target_ops child_ops;
97 static void child_stop (void);
98 static int win32_child_thread_alive (ptid_t);
99 void child_kill_inferior (void);
101 static enum target_signal last_sig = TARGET_SIGNAL_0;
102 /* Set if a signal was received from the debugged process */
104 /* Thread information structure used to track information that is
105 not available in gdb's thread structure. */
106 typedef struct thread_info_struct
108 struct thread_info_struct *next;
118 static thread_info thread_head;
120 /* The process and thread handles for the above context. */
122 static DEBUG_EVENT current_event; /* The current debug event from
124 static HANDLE current_process_handle; /* Currently executing process */
125 static thread_info *current_thread; /* Info on currently selected thread */
126 static DWORD main_thread_id; /* Thread ID of the main thread */
128 /* Counts of things. */
129 static int exception_count = 0;
130 static int event_count = 0;
131 static int saw_create;
134 static int new_console = 0;
135 static int new_group = 1;
136 static int debug_exec = 0; /* show execution */
137 static int debug_events = 0; /* show events from kernel */
138 static int debug_memory = 0; /* show target memory accesses */
139 static int debug_exceptions = 0; /* show target exceptions */
140 static int useshell = 0; /* use shell for subprocesses */
142 /* This vector maps GDB's idea of a register's number into an address
143 in the win32 exception context vector.
145 It also contains the bit mask needed to load the register in question.
147 One day we could read a reg, we could inspect the context we
148 already have loaded, if it doesn't have the bit set that we need,
149 we read that set of registers in using GetThreadContext. If the
150 context already contains what we need, we just unpack it. Then to
151 write a register, first we have to ensure that the context contains
152 the other regs of the group, and then we copy the info in and set
155 #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
156 static const int mappings[] =
158 context_offset (Eax),
159 context_offset (Ecx),
160 context_offset (Edx),
161 context_offset (Ebx),
162 context_offset (Esp),
163 context_offset (Ebp),
164 context_offset (Esi),
165 context_offset (Edi),
166 context_offset (Eip),
167 context_offset (EFlags),
168 context_offset (SegCs),
169 context_offset (SegSs),
170 context_offset (SegDs),
171 context_offset (SegEs),
172 context_offset (SegFs),
173 context_offset (SegGs),
174 context_offset (FloatSave.RegisterArea[0 * 10]),
175 context_offset (FloatSave.RegisterArea[1 * 10]),
176 context_offset (FloatSave.RegisterArea[2 * 10]),
177 context_offset (FloatSave.RegisterArea[3 * 10]),
178 context_offset (FloatSave.RegisterArea[4 * 10]),
179 context_offset (FloatSave.RegisterArea[5 * 10]),
180 context_offset (FloatSave.RegisterArea[6 * 10]),
181 context_offset (FloatSave.RegisterArea[7 * 10]),
182 context_offset (FloatSave.ControlWord),
183 context_offset (FloatSave.StatusWord),
184 context_offset (FloatSave.TagWord),
185 context_offset (FloatSave.ErrorSelector),
186 context_offset (FloatSave.ErrorOffset),
187 context_offset (FloatSave.DataSelector),
188 context_offset (FloatSave.DataOffset),
189 context_offset (FloatSave.ErrorSelector)
192 context_offset (ExtendedRegisters[10*16]),
193 context_offset (ExtendedRegisters[11*16]),
194 context_offset (ExtendedRegisters[12*16]),
195 context_offset (ExtendedRegisters[13*16]),
196 context_offset (ExtendedRegisters[14*16]),
197 context_offset (ExtendedRegisters[15*16]),
198 context_offset (ExtendedRegisters[16*16]),
199 context_offset (ExtendedRegisters[17*16]),
201 context_offset (ExtendedRegisters[24])
205 #undef context_offset
207 /* This vector maps the target's idea of an exception (extracted
208 from the DEBUG_EVENT structure) to GDB's idea. */
210 struct xlate_exception
213 enum target_signal us;
216 static const struct xlate_exception
219 {EXCEPTION_ACCESS_VIOLATION, TARGET_SIGNAL_SEGV},
220 {STATUS_STACK_OVERFLOW, TARGET_SIGNAL_SEGV},
221 {EXCEPTION_BREAKPOINT, TARGET_SIGNAL_TRAP},
222 {DBG_CONTROL_C, TARGET_SIGNAL_INT},
223 {EXCEPTION_SINGLE_STEP, TARGET_SIGNAL_TRAP},
224 {STATUS_FLOAT_DIVIDE_BY_ZERO, TARGET_SIGNAL_FPE},
228 check (BOOL ok, const char *file, int line)
231 printf_filtered ("error return %s:%d was %lu\n", file, line,
236 /* Find a thread record given a thread id.
237 If get_context then also retrieve the context for this
240 thread_rec (DWORD id, int get_context)
244 for (th = &thread_head; (th = th->next) != NULL;)
247 if (!th->suspend_count && get_context)
249 if (get_context > 0 && id != current_event.dwThreadId)
250 th->suspend_count = SuspendThread (th->h) + 1;
251 else if (get_context < 0)
252 th->suspend_count = -1;
254 th->context.ContextFlags = CONTEXT_DEBUGGER_DR;
255 GetThreadContext (th->h, &th->context);
256 if (id == current_event.dwThreadId)
258 /* Copy dr values from that thread. */
259 dr[0] = th->context.Dr0;
260 dr[1] = th->context.Dr1;
261 dr[2] = th->context.Dr2;
262 dr[3] = th->context.Dr3;
263 dr[6] = th->context.Dr6;
264 dr[7] = th->context.Dr7;
273 /* Add a thread to the thread list */
275 child_add_thread (DWORD id, HANDLE h)
279 if ((th = thread_rec (id, FALSE)))
282 th = (thread_info *) xmalloc (sizeof (*th));
283 memset (th, 0, sizeof (*th));
286 th->next = thread_head.next;
287 thread_head.next = th;
288 add_thread (pid_to_ptid (id));
289 /* Set the debug registers for the new thread in they are used. */
290 if (debug_registers_used)
292 /* Only change the value of the debug registers. */
293 th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS;
294 CHECK (GetThreadContext (th->h, &th->context));
295 th->context.Dr0 = dr[0];
296 th->context.Dr1 = dr[1];
297 th->context.Dr2 = dr[2];
298 th->context.Dr3 = dr[3];
299 /* th->context.Dr6 = dr[6];
300 FIXME: should we set dr6 also ?? */
301 th->context.Dr7 = dr[7];
302 CHECK (SetThreadContext (th->h, &th->context));
303 th->context.ContextFlags = 0;
308 /* Clear out any old thread list and reintialize it to a
311 child_init_thread_list (void)
313 thread_info *th = &thread_head;
315 DEBUG_EVENTS (("gdb: child_init_thread_list\n"));
317 while (th->next != NULL)
319 thread_info *here = th->next;
320 th->next = here->next;
321 (void) CloseHandle (here->h);
326 /* Delete a thread from the list of threads */
328 child_delete_thread (DWORD id)
333 printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (pid_to_ptid (id)));
334 delete_thread (pid_to_ptid (id));
336 for (th = &thread_head;
337 th->next != NULL && th->next->id != id;
341 if (th->next != NULL)
343 thread_info *here = th->next;
344 th->next = here->next;
345 CloseHandle (here->h);
351 do_child_fetch_inferior_registers (int r)
353 char *context_offset = ((char *) ¤t_thread->context) + mappings[r];
357 l = *((long *) context_offset) & 0xffff;
358 supply_register (r, (char *) &l);
360 else if (r == FOP_REGNUM)
362 l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1);
363 supply_register (r, (char *) &l);
366 supply_register (r, context_offset);
369 for (r = 0; r < NUM_REGS; r++)
370 do_child_fetch_inferior_registers (r);
375 child_fetch_inferior_registers (int r)
377 current_thread = thread_rec (PIDGET (inferior_ptid), TRUE);
378 do_child_fetch_inferior_registers (r);
382 do_child_store_inferior_registers (int r)
385 regcache_collect (r, ((char *) ¤t_thread->context) + mappings[r]);
388 for (r = 0; r < NUM_REGS; r++)
389 do_child_store_inferior_registers (r);
393 /* Store a new register value into the current thread context */
395 child_store_inferior_registers (int r)
397 current_thread = thread_rec (PIDGET (inferior_ptid), TRUE);
398 do_child_store_inferior_registers (r);
401 static int psapi_loaded = 0;
402 static HMODULE psapi_module_handle = NULL;
403 static BOOL WINAPI (*psapi_EnumProcessModules) (HANDLE, HMODULE *, DWORD, LPDWORD) = NULL;
404 static BOOL WINAPI (*psapi_GetModuleInformation) (HANDLE, HMODULE, LPMODULEINFO, DWORD) = NULL;
405 static DWORD WINAPI (*psapi_GetModuleFileNameExA) (HANDLE, HMODULE, LPSTR, DWORD) = NULL;
408 psapi_get_dll_name (DWORD BaseAddress, char *dll_name_ret)
414 HMODULE *DllHandle = dh_buf;
419 psapi_EnumProcessModules == NULL ||
420 psapi_GetModuleInformation == NULL ||
421 psapi_GetModuleFileNameExA == NULL)
426 psapi_module_handle = LoadLibrary ("psapi.dll");
427 if (!psapi_module_handle)
429 /* printf_unfiltered ("error loading psapi.dll: %u", GetLastError ()); */
432 psapi_EnumProcessModules = GetProcAddress (psapi_module_handle, "EnumProcessModules");
433 psapi_GetModuleInformation = GetProcAddress (psapi_module_handle, "GetModuleInformation");
434 psapi_GetModuleFileNameExA = (void *) GetProcAddress (psapi_module_handle,
435 "GetModuleFileNameExA");
436 if (psapi_EnumProcessModules == NULL ||
437 psapi_GetModuleInformation == NULL ||
438 psapi_GetModuleFileNameExA == NULL)
443 ok = (*psapi_EnumProcessModules) (current_process_handle,
448 if (!ok || !cbNeeded)
451 DllHandle = (HMODULE *) alloca (cbNeeded);
455 ok = (*psapi_EnumProcessModules) (current_process_handle,
462 for (i = 0; i < (int) (cbNeeded / sizeof (HMODULE)); i++)
464 if (!(*psapi_GetModuleInformation) (current_process_handle,
468 error ("Can't get module info");
470 len = (*psapi_GetModuleFileNameExA) (current_process_handle,
475 error ("Error getting dll name: %u\n", (unsigned) GetLastError ());
477 if ((DWORD) (mi.lpBaseOfDll) == BaseAddress)
482 dll_name_ret[0] = '\0';
486 /* Encapsulate the information required in a call to
487 symbol_file_add_args */
488 struct safe_symbol_file_add_args
492 struct section_addr_info *addrs;
495 struct ui_file *err, *out;
499 /* Maintain a linked list of "so" information. */
502 struct so_stuff *next;
506 struct objfile *objfile;
508 } solib_start, *solib_end;
510 /* Call symbol_file_add with stderr redirected. We don't care if there
513 safe_symbol_file_add_stub (void *argv)
515 #define p ((struct safe_symbol_file_add_args *)argv)
516 struct so_stuff *so = &solib_start;
518 while ((so = so->next))
519 if (so->loaded && strcasecmp (so->name, p->name) == 0)
521 p->ret = symbol_file_add (p->name, p->from_tty, p->addrs, p->mainline, p->flags);
526 /* Restore gdb's stderr after calling symbol_file_add */
528 safe_symbol_file_add_cleanup (void *p)
530 #define sp ((struct safe_symbol_file_add_args *)p)
531 gdb_flush (gdb_stderr);
532 gdb_flush (gdb_stdout);
533 ui_file_delete (gdb_stderr);
534 ui_file_delete (gdb_stdout);
535 gdb_stderr = sp->err;
536 gdb_stdout = sp->out;
540 /* symbol_file_add wrapper that prevents errors from being displayed. */
541 static struct objfile *
542 safe_symbol_file_add (char *name, int from_tty,
543 struct section_addr_info *addrs,
544 int mainline, int flags)
546 struct safe_symbol_file_add_args p;
547 struct cleanup *cleanup;
549 cleanup = make_cleanup (safe_symbol_file_add_cleanup, &p);
553 gdb_flush (gdb_stderr);
554 gdb_flush (gdb_stdout);
555 gdb_stderr = ui_file_new ();
556 gdb_stdout = ui_file_new ();
558 p.from_tty = from_tty;
560 p.mainline = mainline;
562 catch_errors (safe_symbol_file_add_stub, &p, "", RETURN_MASK_ERROR);
564 do_cleanups (cleanup);
568 /* Remember the maximum DLL length for printing in info dll command. */
569 int max_dll_name_len;
572 register_loaded_dll (const char *name, DWORD load_addr)
575 char ppath[MAX_PATH + 1];
576 char buf[MAX_PATH + 1];
577 char cwd[MAX_PATH + 1];
579 WIN32_FIND_DATA w32_fd;
580 HANDLE h = FindFirstFile(name, &w32_fd);
581 MEMORY_BASIC_INFORMATION m;
584 if (h == INVALID_HANDLE_VALUE)
590 if (GetCurrentDirectory (MAX_PATH + 1, cwd))
592 p = strrchr (buf, '\\');
595 SetCurrentDirectory (buf);
596 GetFullPathName (w32_fd.cFileName, MAX_PATH, buf, &p);
597 SetCurrentDirectory (cwd);
601 cygwin_conv_to_posix_path (buf, ppath);
602 so = (struct so_stuff *) xmalloc (sizeof (struct so_stuff) + strlen (ppath) + 8 + 1);
604 so->load_addr = load_addr;
605 if (VirtualQueryEx (current_process_handle, (void *) load_addr, &m,
607 so->end_addr = (DWORD) m.AllocationBase + m.RegionSize;
609 so->end_addr = load_addr + 0x2000; /* completely arbitrary */
613 strcpy (so->name, ppath);
615 solib_end->next = so;
617 len = strlen (ppath);
618 if (len > max_dll_name_len)
619 max_dll_name_len = len;
623 get_image_name (HANDLE h, void *address, int unicode)
625 static char buf[(2 * MAX_PATH) + 1];
626 DWORD size = unicode ? sizeof (WCHAR) : sizeof (char);
632 /* Attempt to read the name of the dll that was detected.
633 This is documented to work only when actively debugging
634 a program. It will not work for attached processes. */
638 /* See if we could read the address of a string, and that the
639 address isn't null. */
640 if (!ReadProcessMemory (h, address, &address_ptr, sizeof (address_ptr), &done)
641 || done != sizeof (address_ptr) || !address_ptr)
644 /* Find the length of the string */
645 while (ReadProcessMemory (h, address_ptr + len++ * size, &b, size, &done)
646 && (b[0] != 0 || b[size - 1] != 0) && done == size)
650 ReadProcessMemory (h, address_ptr, buf, len, &done);
653 WCHAR *unicode_address = (WCHAR *) alloca (len * sizeof (WCHAR));
654 ReadProcessMemory (h, address_ptr, unicode_address, len * sizeof (WCHAR),
657 WideCharToMultiByte (CP_ACP, 0, unicode_address, len, buf, len, 0, 0);
663 /* Wait for child to do something. Return pid of child, or -1 in case
664 of error; store status through argument pointer OURSTATUS. */
666 handle_load_dll (void *dummy)
668 LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll;
669 char dll_buf[MAX_PATH + 1];
670 char *dll_name = NULL;
673 dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0';
675 if (!psapi_get_dll_name ((DWORD) (event->lpBaseOfDll), dll_buf))
676 dll_buf[0] = dll_buf[sizeof (dll_buf) - 1] = '\0';
680 if (*dll_name == '\0')
681 dll_name = get_image_name (current_process_handle, event->lpImageName, event->fUnicode);
685 register_loaded_dll (dll_name, (DWORD) event->lpBaseOfDll + 0x1000);
691 handle_unload_dll (void *dummy)
693 DWORD lpBaseOfDll = (DWORD) current_event.u.UnloadDll.lpBaseOfDll + 0x1000;
696 for (so = &solib_start; so->next != NULL; so = so->next)
697 if (so->next->load_addr == lpBaseOfDll)
699 struct so_stuff *sodel = so->next;
700 so->next = sodel->next;
704 free_objfile (sodel->objfile);
708 error ("Error: dll starting at 0x%lx not found.\n", (DWORD) lpBaseOfDll);
714 solib_address (CORE_ADDR address)
717 for (so = &solib_start; so->next != NULL; so = so->next)
718 if (address >= so->load_addr && address <= so->end_addr)
723 /* Return name of last loaded DLL. */
725 child_solib_loaded_library_pathname (int pid)
727 return !solib_end || !solib_end->name[0] ? NULL : solib_end->name;
730 /* Clear list of loaded DLLs. */
732 child_clear_solibs (void)
734 struct so_stuff *so, *so1 = solib_start.next;
736 while ((so = so1) != NULL)
742 solib_start.next = NULL;
743 solib_start.objfile = NULL;
744 solib_end = &solib_start;
745 max_dll_name_len = sizeof ("DLL Name") - 1;
748 /* Get the loaded address of all sections, given that .text was loaded
749 at text_load. Assumes that all sections are subject to the same
750 relocation offset. Returns NULL if problems occur or if the
751 sections were not relocated. */
753 static struct section_addr_info *
754 get_relocated_section_addrs (bfd *abfd, CORE_ADDR text_load)
756 struct section_addr_info *result = NULL;
757 int section_count = bfd_count_sections (abfd);
758 asection *text_section = bfd_get_section_by_name (abfd, ".text");
763 /* Couldn't get the .text section. Weird. */
766 else if (text_load == (text_vma = bfd_get_section_vma (abfd, text_section)))
768 /* DLL wasn't relocated. */
773 /* Figure out all sections' loaded addresses. The offset here is
774 such that taking a bfd_get_section_vma() result and adding
775 offset will give the real load address of the section. */
777 CORE_ADDR offset = text_load - text_vma;
779 struct section_table *table_start = NULL;
780 struct section_table *table_end = NULL;
781 struct section_table *iter = NULL;
783 build_section_table (abfd, &table_start, &table_end);
785 for (iter = table_start; iter < table_end; ++iter)
787 /* Relocated addresses. */
788 iter->addr += offset;
789 iter->endaddr += offset;
792 result = build_section_addr_info_from_section_table (table_start,
801 /* Add DLL symbol information. */
802 static struct objfile *
803 solib_symbols_add (char *name, int from_tty, CORE_ADDR load_addr)
805 struct section_addr_info *section_addrs_ptr = NULL;
806 static struct objfile *result = NULL;
809 /* The symbols in a dll are offset by 0x1000, which is the
810 the offset from 0 of the first byte in an image - because
811 of the file header and the section alignment. */
813 if (!name || !name[0])
816 abfd = bfd_openr (name, "pei-i386");
820 /* pei failed - try pe */
821 abfd = bfd_openr (name, "pe-i386");
826 if (bfd_check_format (abfd, bfd_object))
828 section_addrs_ptr = get_relocated_section_addrs (abfd, load_addr);
834 if (section_addrs_ptr)
836 result = safe_symbol_file_add (name, from_tty, section_addrs_ptr,
839 free_section_addr_info (section_addrs_ptr);
844 /* Fallback on handling just the .text section. */
845 struct section_addr_info *section_addrs;
846 struct cleanup *my_cleanups;
848 section_addrs = alloc_section_addr_info (1);
849 my_cleanups = make_cleanup (xfree, section_addrs);
850 section_addrs->other[0].name = ".text";
851 section_addrs->other[0].addr = load_addr;
853 result = safe_symbol_file_add (name, from_tty, §ion_addrs,
855 do_cleanups (my_cleanups);
861 /* Load DLL symbol info. */
863 dll_symbol_command (char *args, int from_tty)
869 error ("dll-symbols requires a file name");
872 if (n > 4 && strcasecmp (args + n - 4, ".dll") != 0)
874 char *newargs = (char *) alloca (n + 4 + 1);
875 strcpy (newargs, args);
876 strcat (newargs, ".dll");
880 safe_symbol_file_add (args, from_tty, NULL, 0, OBJF_SHARED | OBJF_USERLOADED);
883 /* List currently loaded DLLs. */
885 info_dll_command (char *ignore, int from_tty)
887 struct so_stuff *so = &solib_start;
892 printf_filtered ("%*s Load Address\n", -max_dll_name_len, "DLL Name");
893 while ((so = so->next) != NULL)
894 printf_filtered ("%*s %08lx\n", -max_dll_name_len, so->name, so->load_addr);
899 /* Handle DEBUG_STRING output from child process.
900 Cygwin prepends its messages with a "cygwin:". Interpret this as
901 a Cygwin signal. Otherwise just print the string as a warning. */
903 handle_output_debug_string (struct target_waitstatus *ourstatus)
908 if (!target_read_string
909 ((CORE_ADDR) current_event.u.DebugString.lpDebugStringData, &s, 1024, 0)
913 if (strncmp (s, CYGWIN_SIGNAL_STRING, sizeof (CYGWIN_SIGNAL_STRING) - 1) != 0)
915 if (strncmp (s, "cYg", 3) != 0)
921 int sig = strtol (s + sizeof (CYGWIN_SIGNAL_STRING) - 1, &p, 0);
922 gotasig = target_signal_from_host (sig);
923 ourstatus->value.sig = gotasig;
925 ourstatus->kind = TARGET_WAITKIND_STOPPED;
933 display_selector (HANDLE thread, DWORD sel)
936 if (GetThreadSelectorEntry (thread, sel, &info))
939 printf_filtered ("0x%03lx: ", sel);
940 if (!info.HighWord.Bits.Pres)
942 puts_filtered ("Segment not present\n");
945 base = (info.HighWord.Bits.BaseHi << 24) +
946 (info.HighWord.Bits.BaseMid << 16)
948 limit = (info.HighWord.Bits.LimitHi << 16) + info.LimitLow;
949 if (info.HighWord.Bits.Granularity)
950 limit = (limit << 12) | 0xfff;
951 printf_filtered ("base=0x%08x limit=0x%08x", base, limit);
952 if (info.HighWord.Bits.Default_Big)
953 puts_filtered(" 32-bit ");
955 puts_filtered(" 16-bit ");
956 switch ((info.HighWord.Bits.Type & 0xf) >> 1)
959 puts_filtered ("Data (Read-Only, Exp-up");
962 puts_filtered ("Data (Read/Write, Exp-up");
965 puts_filtered ("Unused segment (");
968 puts_filtered ("Data (Read/Write, Exp-down");
971 puts_filtered ("Code (Exec-Only, N.Conf");
974 puts_filtered ("Code (Exec/Read, N.Conf");
977 puts_filtered ("Code (Exec-Only, Conf");
980 puts_filtered ("Code (Exec/Read, Conf");
983 printf_filtered ("Unknown type 0x%x",info.HighWord.Bits.Type);
985 if ((info.HighWord.Bits.Type & 0x1) == 0)
986 puts_filtered(", N.Acc");
987 puts_filtered (")\n");
988 if ((info.HighWord.Bits.Type & 0x10) == 0)
989 puts_filtered("System selector ");
990 printf_filtered ("Priviledge level = %d. ", info.HighWord.Bits.Dpl);
991 if (info.HighWord.Bits.Granularity)
992 puts_filtered ("Page granular.\n");
994 puts_filtered ("Byte granular.\n");
999 printf_filtered ("Invalid selector 0x%lx.\n",sel);
1005 display_selectors (char * args, int from_tty)
1007 if (!current_thread)
1009 puts_filtered ("Impossible to display selectors now.\n");
1015 puts_filtered ("Selector $cs\n");
1016 display_selector (current_thread->h,
1017 current_thread->context.SegCs);
1018 puts_filtered ("Selector $ds\n");
1019 display_selector (current_thread->h,
1020 current_thread->context.SegDs);
1021 puts_filtered ("Selector $es\n");
1022 display_selector (current_thread->h,
1023 current_thread->context.SegEs);
1024 puts_filtered ("Selector $ss\n");
1025 display_selector (current_thread->h,
1026 current_thread->context.SegSs);
1027 puts_filtered ("Selector $fs\n");
1028 display_selector (current_thread->h,
1029 current_thread->context.SegFs);
1030 puts_filtered ("Selector $gs\n");
1031 display_selector (current_thread->h,
1032 current_thread->context.SegGs);
1037 sel = parse_and_eval_long (args);
1038 printf_filtered ("Selector \"%s\"\n",args);
1039 display_selector (current_thread->h, sel);
1043 static struct cmd_list_element *info_w32_cmdlist = NULL;
1046 info_w32_command (char *args, int from_tty)
1048 help_list (info_w32_cmdlist, "info w32 ", class_info, gdb_stdout);
1052 #define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \
1053 printf_unfiltered ("gdb: Target exception %s at 0x%08lx\n", x, \
1054 (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress)
1057 handle_exception (struct target_waitstatus *ourstatus)
1060 DWORD code = current_event.u.Exception.ExceptionRecord.ExceptionCode;
1062 ourstatus->kind = TARGET_WAITKIND_STOPPED;
1064 /* Record the context of the current thread */
1065 th = thread_rec (current_event.dwThreadId, -1);
1069 case EXCEPTION_ACCESS_VIOLATION:
1070 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ACCESS_VIOLATION");
1071 ourstatus->value.sig = TARGET_SIGNAL_SEGV;
1073 case STATUS_STACK_OVERFLOW:
1074 DEBUG_EXCEPTION_SIMPLE ("STATUS_STACK_OVERFLOW");
1075 ourstatus->value.sig = TARGET_SIGNAL_SEGV;
1077 case STATUS_FLOAT_DENORMAL_OPERAND:
1078 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DENORMAL_OPERAND");
1079 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1081 case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
1082 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ARRAY_BOUNDS_EXCEEDED");
1083 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1085 case STATUS_FLOAT_INEXACT_RESULT:
1086 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INEXACT_RESULT");
1087 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1089 case STATUS_FLOAT_INVALID_OPERATION:
1090 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INVALID_OPERATION");
1091 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1093 case STATUS_FLOAT_OVERFLOW:
1094 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_OVERFLOW");
1095 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1097 case STATUS_FLOAT_STACK_CHECK:
1098 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_STACK_CHECK");
1099 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1101 case STATUS_FLOAT_UNDERFLOW:
1102 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_UNDERFLOW");
1103 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1105 case STATUS_FLOAT_DIVIDE_BY_ZERO:
1106 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DIVIDE_BY_ZERO");
1107 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1109 case STATUS_INTEGER_DIVIDE_BY_ZERO:
1110 DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_DIVIDE_BY_ZERO");
1111 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1113 case STATUS_INTEGER_OVERFLOW:
1114 DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_OVERFLOW");
1115 ourstatus->value.sig = TARGET_SIGNAL_FPE;
1117 case EXCEPTION_BREAKPOINT:
1118 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT");
1119 ourstatus->value.sig = TARGET_SIGNAL_TRAP;
1122 DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_C");
1123 ourstatus->value.sig = TARGET_SIGNAL_INT;
1125 case DBG_CONTROL_BREAK:
1126 DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_BREAK");
1127 ourstatus->value.sig = TARGET_SIGNAL_INT;
1129 case EXCEPTION_SINGLE_STEP:
1130 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_SINGLE_STEP");
1131 ourstatus->value.sig = TARGET_SIGNAL_TRAP;
1133 case EXCEPTION_ILLEGAL_INSTRUCTION:
1134 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ILLEGAL_INSTRUCTION");
1135 ourstatus->value.sig = TARGET_SIGNAL_ILL;
1137 case EXCEPTION_PRIV_INSTRUCTION:
1138 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_PRIV_INSTRUCTION");
1139 ourstatus->value.sig = TARGET_SIGNAL_ILL;
1141 case EXCEPTION_NONCONTINUABLE_EXCEPTION:
1142 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_NONCONTINUABLE_EXCEPTION");
1143 ourstatus->value.sig = TARGET_SIGNAL_ILL;
1146 if (current_event.u.Exception.dwFirstChance)
1148 printf_unfiltered ("gdb: unknown target exception 0x%08lx at 0x%08lx\n",
1149 current_event.u.Exception.ExceptionRecord.ExceptionCode,
1150 (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress);
1151 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
1155 last_sig = ourstatus->value.sig;
1159 /* Resume all artificially suspended threads if we are continuing
1162 child_continue (DWORD continue_status, int id)
1168 DEBUG_EVENTS (("ContinueDebugEvent (cpid=%ld, ctid=%ld, %s);\n",
1169 current_event.dwProcessId, current_event.dwThreadId,
1170 continue_status == DBG_CONTINUE ?
1171 "DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED"));
1172 res = ContinueDebugEvent (current_event.dwProcessId,
1173 current_event.dwThreadId,
1175 continue_status = 0;
1177 for (th = &thread_head; (th = th->next) != NULL;)
1178 if (((id == -1) || (id == (int) th->id)) && th->suspend_count)
1181 for (i = 0; i < th->suspend_count; i++)
1182 (void) ResumeThread (th->h);
1183 th->suspend_count = 0;
1184 if (debug_registers_changed)
1186 /* Only change the value of the debug reisters */
1187 th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS;
1188 th->context.Dr0 = dr[0];
1189 th->context.Dr1 = dr[1];
1190 th->context.Dr2 = dr[2];
1191 th->context.Dr3 = dr[3];
1192 /* th->context.Dr6 = dr[6];
1193 FIXME: should we set dr6 also ?? */
1194 th->context.Dr7 = dr[7];
1195 CHECK (SetThreadContext (th->h, &th->context));
1196 th->context.ContextFlags = 0;
1200 debug_registers_changed = 0;
1204 /* Get the next event from the child. Return 1 if the event requires
1205 handling by WFI (or whatever).
1208 get_child_debug_event (int pid, struct target_waitstatus *ourstatus)
1211 DWORD continue_status, event_code;
1212 thread_info *th = NULL;
1213 static thread_info dummy_thread_info;
1216 last_sig = TARGET_SIGNAL_0;
1218 if (!(debug_event = WaitForDebugEvent (¤t_event, 1000)))
1222 continue_status = DBG_CONTINUE;
1224 event_code = current_event.dwDebugEventCode;
1225 ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
1229 case CREATE_THREAD_DEBUG_EVENT:
1230 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%x code=%s)\n",
1231 (unsigned) current_event.dwProcessId,
1232 (unsigned) current_event.dwThreadId,
1233 "CREATE_THREAD_DEBUG_EVENT"));
1234 if (saw_create != 1)
1236 /* Record the existence of this thread */
1237 th = child_add_thread (current_event.dwThreadId,
1238 current_event.u.CreateThread.hThread);
1240 printf_unfiltered ("[New %s]\n",
1242 pid_to_ptid (current_event.dwThreadId)));
1243 retval = current_event.dwThreadId;
1246 case EXIT_THREAD_DEBUG_EVENT:
1247 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1248 (unsigned) current_event.dwProcessId,
1249 (unsigned) current_event.dwThreadId,
1250 "EXIT_THREAD_DEBUG_EVENT"));
1251 if (saw_create != 1)
1253 child_delete_thread (current_event.dwThreadId);
1254 th = &dummy_thread_info;
1257 case CREATE_PROCESS_DEBUG_EVENT:
1258 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1259 (unsigned) current_event.dwProcessId,
1260 (unsigned) current_event.dwThreadId,
1261 "CREATE_PROCESS_DEBUG_EVENT"));
1262 CloseHandle (current_event.u.CreateProcessInfo.hFile);
1263 if (++saw_create != 1)
1265 CloseHandle (current_event.u.CreateProcessInfo.hProcess);
1269 current_process_handle = current_event.u.CreateProcessInfo.hProcess;
1270 main_thread_id = current_event.dwThreadId;
1271 /* Add the main thread */
1273 th = child_add_thread (current_event.dwProcessId,
1274 current_event.u.CreateProcessInfo.hProcess);
1276 th = child_add_thread (main_thread_id,
1277 current_event.u.CreateProcessInfo.hThread);
1278 retval = ourstatus->value.related_pid = current_event.dwThreadId;
1281 case EXIT_PROCESS_DEBUG_EVENT:
1282 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1283 (unsigned) current_event.dwProcessId,
1284 (unsigned) current_event.dwThreadId,
1285 "EXIT_PROCESS_DEBUG_EVENT"));
1286 if (saw_create != 1)
1288 ourstatus->kind = TARGET_WAITKIND_EXITED;
1289 ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode;
1290 CloseHandle (current_process_handle);
1291 retval = main_thread_id;
1294 case LOAD_DLL_DEBUG_EVENT:
1295 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1296 (unsigned) current_event.dwProcessId,
1297 (unsigned) current_event.dwThreadId,
1298 "LOAD_DLL_DEBUG_EVENT"));
1299 CloseHandle (current_event.u.LoadDll.hFile);
1300 if (saw_create != 1)
1302 catch_errors (handle_load_dll, NULL, (char *) "", RETURN_MASK_ALL);
1303 registers_changed (); /* mark all regs invalid */
1304 ourstatus->kind = TARGET_WAITKIND_LOADED;
1305 ourstatus->value.integer = 0;
1306 retval = main_thread_id;
1307 re_enable_breakpoints_in_shlibs ();
1310 case UNLOAD_DLL_DEBUG_EVENT:
1311 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1312 (unsigned) current_event.dwProcessId,
1313 (unsigned) current_event.dwThreadId,
1314 "UNLOAD_DLL_DEBUG_EVENT"));
1315 if (saw_create != 1)
1317 catch_errors (handle_unload_dll, NULL, (char *) "", RETURN_MASK_ALL);
1318 registers_changed (); /* mark all regs invalid */
1319 /* ourstatus->kind = TARGET_WAITKIND_UNLOADED;
1320 does not exist yet. */
1323 case EXCEPTION_DEBUG_EVENT:
1324 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1325 (unsigned) current_event.dwProcessId,
1326 (unsigned) current_event.dwThreadId,
1327 "EXCEPTION_DEBUG_EVENT"));
1328 if (saw_create != 1)
1330 if (handle_exception (ourstatus))
1331 retval = current_event.dwThreadId;
1334 case OUTPUT_DEBUG_STRING_EVENT: /* message from the kernel */
1335 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1336 (unsigned) current_event.dwProcessId,
1337 (unsigned) current_event.dwThreadId,
1338 "OUTPUT_DEBUG_STRING_EVENT"));
1339 if (saw_create != 1)
1341 if (handle_output_debug_string (ourstatus))
1342 retval = main_thread_id;
1346 if (saw_create != 1)
1348 printf_unfiltered ("gdb: kernel event for pid=%ld tid=%ld\n",
1349 (DWORD) current_event.dwProcessId,
1350 (DWORD) current_event.dwThreadId);
1351 printf_unfiltered (" unknown event code %ld\n",
1352 current_event.dwDebugEventCode);
1356 if (!retval || saw_create != 1)
1357 CHECK (child_continue (continue_status, -1));
1360 current_thread = th ? : thread_rec (current_event.dwThreadId, TRUE);
1361 inferior_ptid = pid_to_ptid (retval);
1368 /* Wait for interesting events to occur in the target process. */
1370 child_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
1372 int pid = PIDGET (ptid);
1374 /* We loop when we get a non-standard exception rather than return
1375 with a SPURIOUS because resume can try and step or modify things,
1376 which needs a current_thread->h. But some of these exceptions mark
1377 the birth or death of threads, which mean that the current thread
1378 isn't necessarily what you think it is. */
1382 int retval = get_child_debug_event (pid, ourstatus);
1384 return pid_to_ptid (retval);
1389 if (ui_loop_hook != NULL)
1390 detach = ui_loop_hook (0);
1393 child_kill_inferior ();
1399 do_initial_child_stuff (DWORD pid)
1401 extern int stop_after_trap;
1404 last_sig = TARGET_SIGNAL_0;
1406 exception_count = 0;
1407 debug_registers_changed = 0;
1408 debug_registers_used = 0;
1409 for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++)
1411 current_event.dwProcessId = pid;
1412 memset (¤t_event, 0, sizeof (current_event));
1413 push_target (&child_ops);
1414 child_init_thread_list ();
1415 disable_breakpoints_in_shlibs (1);
1416 child_clear_solibs ();
1417 clear_proceed_status ();
1418 init_wait_for_inferior ();
1420 target_terminal_init ();
1421 target_terminal_inferior ();
1425 stop_after_trap = 1;
1426 wait_for_inferior ();
1427 if (stop_signal != TARGET_SIGNAL_TRAP)
1428 resume (0, stop_signal);
1432 stop_after_trap = 0;
1436 /* Since Windows XP, detaching from a process is supported by Windows.
1437 The following code tries loading the appropriate functions dynamically.
1438 If loading these functions succeeds use them to actually detach from
1439 the inferior process, otherwise behave as usual, pretending that
1440 detach has worked. */
1441 static BOOL WINAPI (*DebugSetProcessKillOnExit)(BOOL);
1442 static BOOL WINAPI (*DebugActiveProcessStop)(DWORD);
1445 has_detach_ability (void)
1447 static HMODULE kernel32 = NULL;
1450 kernel32 = LoadLibrary ("kernel32.dll");
1453 if (!DebugSetProcessKillOnExit)
1454 DebugSetProcessKillOnExit = GetProcAddress (kernel32,
1455 "DebugSetProcessKillOnExit");
1456 if (!DebugActiveProcessStop)
1457 DebugActiveProcessStop = GetProcAddress (kernel32,
1458 "DebugActiveProcessStop");
1459 if (DebugSetProcessKillOnExit && DebugActiveProcessStop)
1465 /* Try to set or remove a user privilege to the current process. Return -1
1466 if that fails, the previous setting of that privilege otherwise.
1468 This code is copied from the Cygwin source code and rearranged to allow
1469 dynamically loading of the needed symbols from advapi32 which is only
1470 available on NT/2K/XP. */
1472 set_process_privilege (const char *privilege, BOOL enable)
1474 static HMODULE advapi32 = NULL;
1475 static BOOL WINAPI (*OpenProcessToken)(HANDLE, DWORD, PHANDLE);
1476 static BOOL WINAPI (*LookupPrivilegeValue)(LPCSTR, LPCSTR, PLUID);
1477 static BOOL WINAPI (*AdjustTokenPrivileges)(HANDLE, BOOL, PTOKEN_PRIVILEGES,
1478 DWORD, PTOKEN_PRIVILEGES, PDWORD);
1480 HANDLE token_hdl = NULL;
1482 TOKEN_PRIVILEGES new_priv, orig_priv;
1486 if (GetVersion () >= 0x80000000) /* No security availbale on 9x/Me */
1491 if (!(advapi32 = LoadLibrary ("advapi32.dll")))
1493 if (!OpenProcessToken)
1494 OpenProcessToken = GetProcAddress (advapi32, "OpenProcessToken");
1495 if (!LookupPrivilegeValue)
1496 LookupPrivilegeValue = GetProcAddress (advapi32,
1497 "LookupPrivilegeValueA");
1498 if (!AdjustTokenPrivileges)
1499 AdjustTokenPrivileges = GetProcAddress (advapi32,
1500 "AdjustTokenPrivileges");
1501 if (!OpenProcessToken || !LookupPrivilegeValue || !AdjustTokenPrivileges)
1508 if (!OpenProcessToken (GetCurrentProcess (),
1509 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
1513 if (!LookupPrivilegeValue (NULL, privilege, &restore_priv))
1516 new_priv.PrivilegeCount = 1;
1517 new_priv.Privileges[0].Luid = restore_priv;
1518 new_priv.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED : 0;
1520 if (!AdjustTokenPrivileges (token_hdl, FALSE, &new_priv,
1521 sizeof orig_priv, &orig_priv, &size))
1524 /* Disabled, otherwise every `attach' in an unprivileged user session
1525 would raise the "Failed to get SE_DEBUG_NAME privilege" warning in
1527 /* AdjustTokenPrivileges returns TRUE even if the privilege could not
1528 be enabled. GetLastError () returns an correct error code, though. */
1529 if (enable && GetLastError () == ERROR_NOT_ALL_ASSIGNED)
1533 ret = orig_priv.Privileges[0].Attributes == SE_PRIVILEGE_ENABLED ? 1 : 0;
1537 CloseHandle (token_hdl);
1542 /* Attach to process PID, then initialize for debugging it. */
1544 child_attach (char *args, int from_tty)
1550 error_no_arg ("process-id to attach");
1552 if (set_process_privilege (SE_DEBUG_NAME, TRUE) < 0)
1554 printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n");
1555 printf_unfiltered ("This can cause attach to fail on Windows NT/2K/XP\n");
1558 pid = strtoul (args, 0, 0); /* Windows pid */
1560 ok = DebugActiveProcess (pid);
1565 /* Try fall back to Cygwin pid */
1566 pid = cygwin_internal (CW_CYGWIN_PID_TO_WINPID, pid);
1569 ok = DebugActiveProcess (pid);
1572 error ("Can't attach to process.");
1575 if (has_detach_ability ())
1578 DebugSetProcessKillOnExit (FALSE);
1583 char *exec_file = (char *) get_exec_file (0);
1586 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file,
1587 target_pid_to_str (pid_to_ptid (pid)));
1589 printf_unfiltered ("Attaching to %s\n",
1590 target_pid_to_str (pid_to_ptid (pid)));
1592 gdb_flush (gdb_stdout);
1595 do_initial_child_stuff (pid);
1596 target_terminal_ours ();
1600 child_detach (char *args, int from_tty)
1604 if (has_detach_ability ())
1606 delete_command (NULL, 0);
1607 child_continue (DBG_CONTINUE, -1);
1608 if (!DebugActiveProcessStop (current_event.dwProcessId))
1610 error ("Can't detach process %lu (error %lu)",
1611 current_event.dwProcessId, GetLastError ());
1614 DebugSetProcessKillOnExit (FALSE);
1616 if (detached && from_tty)
1618 char *exec_file = get_exec_file (0);
1621 printf_unfiltered ("Detaching from program: %s, Pid %lu\n", exec_file,
1622 current_event.dwProcessId);
1623 gdb_flush (gdb_stdout);
1625 inferior_ptid = null_ptid;
1626 unpush_target (&child_ops);
1629 /* Print status information about what we're accessing. */
1632 child_files_info (struct target_ops *ignore)
1634 printf_unfiltered ("\tUsing the running image of %s %s.\n",
1635 attach_flag ? "attached" : "child", target_pid_to_str (inferior_ptid));
1640 child_open (char *arg, int from_tty)
1642 error ("Use the \"run\" command to start a Unix child process.");
1645 /* Start an inferior win32 child process and sets inferior_ptid to its pid.
1646 EXEC_FILE is the file to run.
1647 ALLARGS is a string containing the arguments to the program.
1648 ENV is the environment vector to pass. Errors reported with error(). */
1651 child_create_inferior (char *exec_file, char *allargs, char **env)
1658 PROCESS_INFORMATION pi;
1662 char real_path[MAXPATHLEN];
1664 char shell[MAX_PATH + 1]; /* Path to shell */
1667 int ostdin, ostdout, ostderr;
1670 error ("No executable specified, use `target exec'.\n");
1672 memset (&si, 0, sizeof (si));
1673 si.cb = sizeof (si);
1677 flags = DEBUG_ONLY_THIS_PROCESS;
1678 cygwin_conv_to_win32_path (exec_file, real_path);
1684 sh = getenv ("SHELL");
1687 cygwin_conv_to_win32_path (sh, shell);
1688 newallargs = alloca (sizeof (" -c 'exec '") + strlen (exec_file)
1689 + strlen (allargs) + 2);
1690 sprintf (newallargs, " -c 'exec %s %s'", exec_file, allargs);
1691 allargs = newallargs;
1693 flags = DEBUG_PROCESS;
1697 flags |= CREATE_NEW_PROCESS_GROUP;
1700 flags |= CREATE_NEW_CONSOLE;
1702 args = alloca (strlen (toexec) + strlen (allargs) + 2);
1703 strcpy (args, toexec);
1705 strcat (args, allargs);
1707 /* Prepare the environment vars for CreateProcess. */
1709 /* This code used to assume all env vars were file names and would
1710 translate them all to win32 style. That obviously doesn't work in the
1711 general case. The current rule is that we only translate PATH.
1712 We need to handle PATH because we're about to call CreateProcess and
1713 it uses PATH to find DLL's. Fortunately PATH has a well-defined value
1714 in both posix and win32 environments. cygwin.dll will change it back
1715 to posix style if necessary. */
1717 static const char *conv_path_names[] =
1723 /* CreateProcess takes the environment list as a null terminated set of
1724 strings (i.e. two nulls terminate the list). */
1726 /* Get total size for env strings. */
1727 for (envlen = 0, i = 0; env[i] && *env[i]; i++)
1731 for (j = 0; conv_path_names[j]; j++)
1733 len = strlen (conv_path_names[j]);
1734 if (strncmp (conv_path_names[j], env[i], len) == 0)
1736 if (cygwin_posix_path_list_p (env[i] + len))
1738 + cygwin_posix_to_win32_path_list_buf_size (env[i] + len);
1740 envlen += strlen (env[i]) + 1;
1744 if (conv_path_names[j] == NULL)
1745 envlen += strlen (env[i]) + 1;
1748 winenv = alloca (envlen + 1);
1750 /* Copy env strings into new buffer. */
1751 for (temp = winenv, i = 0; env[i] && *env[i]; i++)
1755 for (j = 0; conv_path_names[j]; j++)
1757 len = strlen (conv_path_names[j]);
1758 if (strncmp (conv_path_names[j], env[i], len) == 0)
1760 if (cygwin_posix_path_list_p (env[i] + len))
1762 memcpy (temp, env[i], len);
1763 cygwin_posix_to_win32_path_list (env[i] + len, temp + len);
1766 strcpy (temp, env[i]);
1770 if (conv_path_names[j] == NULL)
1771 strcpy (temp, env[i]);
1773 temp += strlen (temp) + 1;
1776 /* Final nil string to terminate new env. */
1780 if (!inferior_io_terminal)
1781 tty = ostdin = ostdout = ostderr = -1;
1784 tty = open (inferior_io_terminal, O_RDWR | O_NOCTTY);
1787 print_sys_errmsg (inferior_io_terminal, errno);
1788 ostdin = ostdout = ostderr = -1;
1801 ret = CreateProcess (0,
1802 args, /* command line */
1803 NULL, /* Security */
1805 TRUE, /* inherit handles */
1806 flags, /* start flags */
1808 NULL, /* current directory */
1823 error ("Error creating process %s, (error %d)\n", exec_file, (unsigned) GetLastError ());
1825 CloseHandle (pi.hThread);
1826 CloseHandle (pi.hProcess);
1828 if (useshell && shell[0] != '\0')
1833 do_initial_child_stuff (pi.dwProcessId);
1835 /* child_continue (DBG_CONTINUE, -1); */
1836 proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_0, 0);
1840 child_mourn_inferior (void)
1842 (void) child_continue (DBG_CONTINUE, -1);
1843 i386_cleanup_dregs();
1844 unpush_target (&child_ops);
1845 generic_mourn_inferior ();
1848 /* Send a SIGINT to the process group. This acts just like the user typed a
1849 ^C on the controlling terminal. */
1854 DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n"));
1855 CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId));
1856 registers_changed (); /* refresh register state */
1860 child_xfer_memory (CORE_ADDR memaddr, char *our, int len,
1861 int write, struct mem_attrib *mem,
1862 struct target_ops *target)
1867 DEBUG_MEM (("gdb: write target memory, %d bytes at 0x%08lx\n",
1868 len, (DWORD) memaddr));
1869 if (!WriteProcessMemory (current_process_handle, (LPVOID) memaddr, our,
1872 FlushInstructionCache (current_process_handle, (LPCVOID) memaddr, len);
1876 DEBUG_MEM (("gdb: read target memory, %d bytes at 0x%08lx\n",
1877 len, (DWORD) memaddr));
1878 if (!ReadProcessMemory (current_process_handle, (LPCVOID) memaddr, our,
1886 child_kill_inferior (void)
1888 CHECK (TerminateProcess (current_process_handle, 0));
1892 if (!child_continue (DBG_CONTINUE, -1))
1894 if (!WaitForDebugEvent (¤t_event, INFINITE))
1896 if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT)
1900 CHECK (CloseHandle (current_process_handle));
1902 /* this may fail in an attached process so don't check. */
1903 (void) CloseHandle (current_thread->h);
1904 target_mourn_inferior (); /* or just child_mourn_inferior? */
1908 child_resume (ptid_t ptid, int step, enum target_signal sig)
1911 DWORD continue_status = DBG_CONTINUE;
1913 int pid = PIDGET (ptid);
1915 if (sig != TARGET_SIGNAL_0)
1917 if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT)
1919 DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig));
1921 else if (sig == last_sig)
1922 continue_status = DBG_EXCEPTION_NOT_HANDLED;
1925 /* This code does not seem to work, because
1926 the kernel does probably not consider changes in the ExceptionRecord
1927 structure when passing the exception to the inferior.
1928 Note that this seems possible in the exception handler itself. */
1931 for (i = 0; xlate[i].them != -1; i++)
1932 if (xlate[i].us == sig)
1934 current_event.u.Exception.ExceptionRecord.ExceptionCode =
1936 continue_status = DBG_EXCEPTION_NOT_HANDLED;
1939 if (continue_status == DBG_CONTINUE)
1941 DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig));
1945 DEBUG_EXCEPT(("Can only continue with recieved signal %d.\n",
1949 last_sig = TARGET_SIGNAL_0;
1951 DEBUG_EXEC (("gdb: child_resume (pid=%d, step=%d, sig=%d);\n",
1954 /* Get context for currently selected thread */
1955 th = thread_rec (current_event.dwThreadId, FALSE);
1960 /* Single step by setting t bit */
1961 child_fetch_inferior_registers (PS_REGNUM);
1962 th->context.EFlags |= FLAG_TRACE_BIT;
1965 if (th->context.ContextFlags)
1967 if (debug_registers_changed)
1969 th->context.Dr0 = dr[0];
1970 th->context.Dr1 = dr[1];
1971 th->context.Dr2 = dr[2];
1972 th->context.Dr3 = dr[3];
1973 /* th->context.Dr6 = dr[6];
1974 FIXME: should we set dr6 also ?? */
1975 th->context.Dr7 = dr[7];
1977 CHECK (SetThreadContext (th->h, &th->context));
1978 th->context.ContextFlags = 0;
1982 /* Allow continuing with the same signal that interrupted us.
1983 Otherwise complain. */
1985 child_continue (continue_status, pid);
1989 child_prepare_to_store (void)
1991 /* Do nothing, since we can store individual regs */
1995 child_can_run (void)
2003 DEBUG_EVENTS (("gdb: child_close, inferior_ptid=%d\n",
2004 PIDGET (inferior_ptid)));
2007 struct target_ops child_ops;
2010 init_child_ops (void)
2012 child_ops.to_shortname = "child";
2013 child_ops.to_longname = "Win32 child process";
2014 child_ops.to_doc = "Win32 child process (started by the \"run\" command).";
2015 child_ops.to_open = child_open;
2016 child_ops.to_close = child_close;
2017 child_ops.to_attach = child_attach;
2018 child_ops.to_detach = child_detach;
2019 child_ops.to_resume = child_resume;
2020 child_ops.to_wait = child_wait;
2021 child_ops.to_fetch_registers = child_fetch_inferior_registers;
2022 child_ops.to_store_registers = child_store_inferior_registers;
2023 child_ops.to_prepare_to_store = child_prepare_to_store;
2024 child_ops.to_xfer_memory = child_xfer_memory;
2025 child_ops.to_files_info = child_files_info;
2026 child_ops.to_insert_breakpoint = memory_insert_breakpoint;
2027 child_ops.to_remove_breakpoint = memory_remove_breakpoint;
2028 child_ops.to_terminal_init = terminal_init_inferior;
2029 child_ops.to_terminal_inferior = terminal_inferior;
2030 child_ops.to_terminal_ours_for_output = terminal_ours_for_output;
2031 child_ops.to_terminal_ours = terminal_ours;
2032 child_ops.to_terminal_save_ours = terminal_save_ours;
2033 child_ops.to_terminal_info = child_terminal_info;
2034 child_ops.to_kill = child_kill_inferior;
2035 child_ops.to_create_inferior = child_create_inferior;
2036 child_ops.to_mourn_inferior = child_mourn_inferior;
2037 child_ops.to_can_run = child_can_run;
2038 child_ops.to_thread_alive = win32_child_thread_alive;
2039 child_ops.to_pid_to_str = cygwin_pid_to_str;
2040 child_ops.to_stop = child_stop;
2041 child_ops.to_stratum = process_stratum;
2042 child_ops.to_has_all_memory = 1;
2043 child_ops.to_has_memory = 1;
2044 child_ops.to_has_stack = 1;
2045 child_ops.to_has_registers = 1;
2046 child_ops.to_has_execution = 1;
2047 child_ops.to_magic = OPS_MAGIC;
2051 _initialize_win32_nat (void)
2053 struct cmd_list_element *c;
2057 c = add_com ("dll-symbols", class_files, dll_symbol_command,
2058 "Load dll library symbols from FILE.");
2059 set_cmd_completer (c, filename_completer);
2061 add_com_alias ("sharedlibrary", "dll-symbols", class_alias, 1);
2063 add_show_from_set (add_set_cmd ("shell", class_support, var_boolean,
2065 "Set use of shell to start subprocess.",
2069 add_show_from_set (add_set_cmd ("new-console", class_support, var_boolean,
2070 (char *) &new_console,
2071 "Set creation of new console when creating child process.",
2075 add_show_from_set (add_set_cmd ("new-group", class_support, var_boolean,
2076 (char *) &new_group,
2077 "Set creation of new group when creating child process.",
2081 add_show_from_set (add_set_cmd ("debugexec", class_support, var_boolean,
2082 (char *) &debug_exec,
2083 "Set whether to display execution in child process.",
2087 add_show_from_set (add_set_cmd ("debugevents", class_support, var_boolean,
2088 (char *) &debug_events,
2089 "Set whether to display kernel events in child process.",
2093 add_show_from_set (add_set_cmd ("debugmemory", class_support, var_boolean,
2094 (char *) &debug_memory,
2095 "Set whether to display memory accesses in child process.",
2099 add_show_from_set (add_set_cmd ("debugexceptions", class_support, var_boolean,
2100 (char *) &debug_exceptions,
2101 "Set whether to display kernel exceptions in child process.",
2105 add_info ("dll", info_dll_command, "Status of loaded DLLs.");
2106 add_info_alias ("sharedlibrary", "dll", 1);
2108 add_prefix_cmd ("w32", class_info, info_w32_command,
2109 "Print information specific to Win32 debugging.",
2110 &info_w32_cmdlist, "info w32 ", 0, &infolist);
2112 add_cmd ("selector", class_info, display_selectors,
2113 "Display selectors infos.",
2116 add_target (&child_ops);
2119 /* Hardware watchpoint support, adapted from go32-nat.c code. */
2121 /* Pass the address ADDR to the inferior in the I'th debug register.
2122 Here we just store the address in dr array, the registers will be
2123 actually set up when child_continue is called. */
2125 cygwin_set_dr (int i, CORE_ADDR addr)
2128 internal_error (__FILE__, __LINE__,
2129 "Invalid register %d in cygwin_set_dr.\n", i);
2130 dr[i] = (unsigned) addr;
2131 debug_registers_changed = 1;
2132 debug_registers_used = 1;
2135 /* Pass the value VAL to the inferior in the DR7 debug control
2136 register. Here we just store the address in D_REGS, the watchpoint
2137 will be actually set up in child_wait. */
2139 cygwin_set_dr7 (unsigned val)
2142 debug_registers_changed = 1;
2143 debug_registers_used = 1;
2146 /* Get the value of the DR6 debug status register from the inferior.
2147 Here we just return the value stored in dr[6]
2148 by the last call to thread_rec for current_event.dwThreadId id. */
2150 cygwin_get_dr6 (void)
2156 /* Determine if the thread referenced by "pid" is alive
2157 by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
2158 it means that the pid has died. Otherwise it is assumed to be alive. */
2160 win32_child_thread_alive (ptid_t ptid)
2162 int pid = PIDGET (ptid);
2164 return WaitForSingleObject (thread_rec (pid, FALSE)->h, 0) == WAIT_OBJECT_0 ?
2168 /* Convert pid to printable format. */
2170 cygwin_pid_to_str (ptid_t ptid)
2172 static char buf[80];
2173 int pid = PIDGET (ptid);
2175 if ((DWORD) pid == current_event.dwProcessId)
2176 sprintf (buf, "process %d", pid);
2178 sprintf (buf, "thread %ld.0x%x", current_event.dwProcessId, pid);
2183 core_dll_symbols_add (char *dll_name, DWORD base_addr)
2185 struct objfile *objfile;
2186 char *objfile_basename;
2187 const char *dll_basename;
2189 if (!(dll_basename = strrchr (dll_name, '/')))
2190 dll_basename = dll_name;
2194 ALL_OBJFILES (objfile)
2196 objfile_basename = strrchr (objfile->name, '/');
2198 if (objfile_basename &&
2199 strcmp (dll_basename, objfile_basename + 1) == 0)
2201 printf_unfiltered ("%08lx:%s (symbols previously loaded)\n",
2202 base_addr, dll_name);
2207 register_loaded_dll (dll_name, base_addr + 0x1000);
2208 solib_symbols_add (dll_name, 0, (CORE_ADDR) base_addr + 0x1000);
2216 struct target_ops *target;
2219 map_code_section_args;
2222 map_single_dll_code_section (bfd * abfd, asection * sect, void *obj)
2226 struct section_table *new_target_sect_ptr;
2228 map_code_section_args *args = (map_code_section_args *) obj;
2229 struct target_ops *target = args->target;
2230 if (sect->flags & SEC_CODE)
2232 update_coreops = core_ops.to_sections == target->to_sections;
2234 if (target->to_sections)
2236 old = target->to_sections_end - target->to_sections;
2237 target->to_sections = (struct section_table *)
2238 xrealloc ((char *) target->to_sections,
2239 (sizeof (struct section_table)) * (1 + old));
2244 target->to_sections = (struct section_table *)
2245 xmalloc ((sizeof (struct section_table)));
2247 target->to_sections_end = target->to_sections + (1 + old);
2249 /* Update the to_sections field in the core_ops structure
2253 core_ops.to_sections = target->to_sections;
2254 core_ops.to_sections_end = target->to_sections_end;
2256 new_target_sect_ptr = target->to_sections + old;
2257 new_target_sect_ptr->addr = args->addr + bfd_section_vma (abfd, sect);
2258 new_target_sect_ptr->endaddr = args->addr + bfd_section_vma (abfd, sect) +
2259 bfd_section_size (abfd, sect);;
2260 new_target_sect_ptr->the_bfd_section = sect;
2261 new_target_sect_ptr->bfd = abfd;
2266 dll_code_sections_add (const char *dll_name, int base_addr, struct target_ops *target)
2269 map_code_section_args map_args;
2270 asection *lowest_sect;
2272 if (dll_name == NULL || target == NULL)
2274 name = xstrdup (dll_name);
2275 dll_bfd = bfd_openr (name, "pei-i386");
2276 if (dll_bfd == NULL)
2279 if (bfd_check_format (dll_bfd, bfd_object))
2281 lowest_sect = bfd_get_section_by_name (dll_bfd, ".text");
2282 if (lowest_sect == NULL)
2284 map_args.target = target;
2285 map_args.addr = base_addr - bfd_section_vma (dll_bfd, lowest_sect);
2287 bfd_map_over_sections (dll_bfd, &map_single_dll_code_section, (void *) (&map_args));
2294 core_section_load_dll_symbols (bfd * abfd, asection * sect, void *obj)
2296 struct target_ops *target = (struct target_ops *) obj;
2301 char *dll_name = NULL;
2303 struct win32_pstatus *pstatus;
2306 if (strncmp (sect->name, ".module", 7))
2309 buf = (char *) xmalloc (sect->_raw_size + 1);
2312 printf_unfiltered ("memory allocation failed for %s\n", sect->name);
2315 if (!bfd_get_section_contents (abfd, sect, buf, 0, sect->_raw_size))
2318 pstatus = (struct win32_pstatus *) buf;
2320 memmove (&base_addr, &(pstatus->data.module_info.base_address), sizeof (base_addr));
2321 dll_name_size = pstatus->data.module_info.module_name_size;
2322 if (offsetof (struct win32_pstatus, data.module_info.module_name) + dll_name_size > sect->_raw_size)
2325 dll_name = (char *) xmalloc (dll_name_size + 1);
2328 printf_unfiltered ("memory allocation failed for %s\n", sect->name);
2331 strncpy (dll_name, pstatus->data.module_info.module_name, dll_name_size);
2333 while ((p = strchr (dll_name, '\\')))
2336 if (!core_dll_symbols_add (dll_name, (DWORD) base_addr))
2337 printf_unfiltered ("%s: Failed to load dll symbols.\n", dll_name);
2339 if (!dll_code_sections_add (dll_name, (DWORD) base_addr + 0x1000, target))
2340 printf_unfiltered ("%s: Failed to map dll code sections.\n", dll_name);
2351 child_solib_add (char *filename, int from_tty, struct target_ops *target,
2358 child_clear_solibs ();
2359 bfd_map_over_sections (core_bfd, &core_section_load_dll_symbols, target);
2363 if (solib_end && solib_end->name)
2364 solib_end->objfile = solib_symbols_add (solib_end->name, from_tty,
2365 solib_end->load_addr);
2370 fetch_elf_core_registers (char *core_reg_sect,
2371 unsigned core_reg_size,
2376 if (core_reg_size < sizeof (CONTEXT))
2378 error ("Core file register section too small (%u bytes).", core_reg_size);
2381 for (r = 0; r < NUM_REGS; r++)
2382 supply_register (r, core_reg_sect + mappings[r]);
2385 static struct core_fns win32_elf_core_fns =
2387 bfd_target_elf_flavour,
2388 default_check_format,
2389 default_core_sniffer,
2390 fetch_elf_core_registers,
2395 _initialize_core_win32 (void)
2397 add_core_fns (&win32_elf_core_fns);
2401 _initialize_check_for_gdb_ini (void)
2404 if (inhibit_gdbinit)
2407 homedir = getenv ("HOME");
2411 char *oldini = (char *) alloca (strlen (homedir) +
2412 sizeof ("/gdb.ini"));
2413 strcpy (oldini, homedir);
2414 p = strchr (oldini, '\0');
2415 if (p > oldini && p[-1] != '/')
2417 strcpy (p, "gdb.ini");
2418 if (access (oldini, 0) == 0)
2420 int len = strlen (oldini);
2421 char *newini = alloca (len + 1);
2422 sprintf (newini, "%.*s.gdbinit",
2423 (int) (len - (sizeof ("gdb.ini") - 1)), oldini);
2424 warning ("obsolete '%s' found. Rename to '%s'.", oldini, newini);