programs/winedevice/device.c

   1 /*
   2  * Service process to load a kernel driver
   3  *
   4  * Copyright 2007 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <stdarg.h>
  25
  26 #include "ntstatus.h"
  27 #define WIN32_NO_STATUS
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "winternl.h"
  31 #include "winreg.h"
  32 #include "winnls.h"
  33 #include "winsvc.h"
  34 #include "ddk/wdm.h"
  35 #include "wine/unicode.h"
  36 #include "wine/debug.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(winedevice);
  39 WINE_DECLARE_DEBUG_CHANNEL(relay);
  40
  41 extern NTSTATUS wine_ntoskrnl_main_loop( HANDLE stop_event );
  42
  43 static WCHAR *driver_name;
  44 static SERVICE_STATUS_HANDLE service_handle;
  45 static HKEY driver_hkey;
  46 static HANDLE stop_event;
  47 static DRIVER_OBJECT driver_obj;
  48 static DRIVER_EXTENSION driver_extension;
  49
  50 /* find the LDR_MODULE corresponding to the driver module */
  51 static LDR_MODULE *find_ldr_module( HMODULE module )
  52 {
  53     LIST_ENTRY *entry, *list = &NtCurrentTeb()->Peb->LdrData->InMemoryOrderModuleList;
  54
  55     for (entry = list->Flink; entry != list; entry = entry->Flink)
  56     {
  57         LDR_MODULE *ldr = CONTAINING_RECORD(entry, LDR_MODULE, InMemoryOrderModuleList);
  58         if (ldr->BaseAddress == module) return ldr;
  59         if (ldr->BaseAddress > (void *)module) break;
  60     }
  61     return NULL;
  62 }
  63
  64 /* load the driver module file */
  65 static HMODULE load_driver_module( const WCHAR *name )
  66 {
  67     const IMAGE_NT_HEADERS *nt;
  68     size_t page_size = getpagesize();
  69     int delta;
  70     HMODULE module = LoadLibraryW( name );
  71
  72     if (!module) return NULL;
  73     nt = RtlImageNtHeader( module );
  74
  75     if (!(delta = (char *)module - (char *)nt->OptionalHeader.ImageBase)) return module;
  76
  77     /* the loader does not apply relocations to non page-aligned binaries or executables,
  78      * we have to do it ourselves */
  79
  80     if (nt->OptionalHeader.SectionAlignment < page_size ||
  81         !(nt->FileHeader.Characteristics & IMAGE_FILE_DLL))
  82     {
  83         ULONG size;
  84         DWORD old;
  85         IMAGE_BASE_RELOCATION *rel, *end;
  86
  87         if ((rel = RtlImageDirectoryEntryToData( module, TRUE, IMAGE_DIRECTORY_ENTRY_BASERELOC, &size )))
  88         {
  89             WINE_TRACE( "%s: relocating from %p to %p\n",
  90                         wine_dbgstr_w(name), (char *)module - delta, module );
  91             end = (IMAGE_BASE_RELOCATION *)((char *)rel + size);
  92             while (rel < end && rel->SizeOfBlock)
  93             {
  94                 void *page = (char *)module + rel->VirtualAddress;
  95                 VirtualProtect( page, page_size, PAGE_EXECUTE_READWRITE, &old );
  96                 rel = LdrProcessRelocationBlock( page, (rel->SizeOfBlock - sizeof(*rel)) / sizeof(USHORT),
  97                                                  (USHORT *)(rel + 1), delta );
  98                 if (old != PAGE_EXECUTE_READWRITE) VirtualProtect( page, page_size, old, NULL );
  99                 if (!rel) goto error;
 100             }
 101         }
 102     }
 103     return module;
 104
 105 error:
 106     FreeLibrary( module );
 107     return NULL;
 108 }
 109
 110 /* call the driver init entry point */
 111 static NTSTATUS init_driver( HMODULE module, UNICODE_STRING *keyname )
 112 {
 113     unsigned int i;
 114     NTSTATUS status;
 115     const IMAGE_NT_HEADERS *nt = RtlImageNtHeader( module );
 116
 117     if (!nt->OptionalHeader.AddressOfEntryPoint) return STATUS_SUCCESS;
 118
 119     driver_obj.Size            = sizeof(driver_obj);
 120     driver_obj.DriverSection   = find_ldr_module( module );
 121     driver_obj.DriverInit      = (PDRIVER_INITIALIZE)((char *)module + nt->OptionalHeader.AddressOfEntryPoint);
 122     driver_obj.DriverExtension = &driver_extension;
 123
 124     driver_extension.DriverObject   = &driver_obj;
 125     driver_extension.ServiceKeyName = *keyname;
 126
 127     if (WINE_TRACE_ON(relay))
 128         WINE_DPRINTF( "%04x:Call driver init %p (obj=%p,str=%s)\n", GetCurrentThreadId(),
 129                       driver_obj.DriverInit, &driver_obj, wine_dbgstr_w(keyname->Buffer) );
 130
 131     status = driver_obj.DriverInit( &driver_obj, keyname );
 132
 133     if (WINE_TRACE_ON(relay))
 134         WINE_DPRINTF( "%04x:Ret  driver init %p (obj=%p,str=%s) retval=%08x\n", GetCurrentThreadId(),
 135                       driver_obj.DriverInit, &driver_obj, wine_dbgstr_w(keyname->Buffer), status );
 136
 137     WINE_TRACE( "init done for %s obj %p\n", wine_dbgstr_w(driver_name), &driver_obj );
 138     WINE_TRACE( "- DriverInit = %p\n", driver_obj.DriverInit );
 139     WINE_TRACE( "- DriverStartIo = %p\n", driver_obj.DriverStartIo );
 140     WINE_TRACE( "- DriverUnload = %p\n", driver_obj.DriverUnload );
 141     for (i = 0; i <= IRP_MJ_MAXIMUM_FUNCTION; i++)
 142         WINE_TRACE( "- MajorFunction[%d] = %p\n", i, driver_obj.MajorFunction[i] );
 143
 144     return status;
 145 }
 146
 147 /* load the .sys module for a device driver */
 148 static BOOL load_driver(void)
 149 {
 150     static const WCHAR ntprefixW[] = {'\\','?','?','\\',0};
 151     static const WCHAR ImagePathW[] = {'I','m','a','g','e','P','a','t','h',0};
 152     static const WCHAR servicesW[] = {'\\','R','e','g','i','s','t','r','y',
 153                                       '\\','M','a','c','h','i','n','e',
 154                                       '\\','S','y','s','t','e','m',
 155                                       '\\','C','u','r','r','e','n','t','C','o','n','t','r','o','l','S','e','t',
 156                                       '\\','S','e','r','v','i','c','e','s','\\',0};
 157
 158     UNICODE_STRING keypath;
 159     HMODULE module;
 160     LPWSTR path = NULL, str;
 161     DWORD type, size;
 162
 163     str = HeapAlloc( GetProcessHeap(), 0, sizeof(servicesW) + strlenW(driver_name)*sizeof(WCHAR) );
 164     lstrcpyW( str, servicesW );
 165     lstrcatW( str, driver_name );
 166
 167     if (RegOpenKeyW( HKEY_LOCAL_MACHINE, str + 18 /* skip \registry\machine */, &driver_hkey ))
 168     {
 169         WINE_ERR( "cannot open key %s, err=%u\n", wine_dbgstr_w(str), GetLastError() );
 170         HeapFree( GetProcessHeap(), 0, str);
 171         return FALSE;
 172     }
 173     RtlInitUnicodeString( &keypath, str );
 174
 175     /* read the executable path from memory */
 176     size = 0;
 177     if (RegQueryValueExW( driver_hkey, ImagePathW, NULL, &type, NULL, &size )) return FALSE;
 178
 179     str = HeapAlloc( GetProcessHeap(), 0, size );
 180     if (!RegQueryValueExW( driver_hkey, ImagePathW, NULL, &type, (LPBYTE)str, &size ))
 181     {
 182         size = ExpandEnvironmentStringsW(str,NULL,0);
 183         path = HeapAlloc(GetProcessHeap(),0,size*sizeof(WCHAR));
 184         ExpandEnvironmentStringsW(str,path,size);
 185     }
 186     HeapFree( GetProcessHeap(), 0, str );
 187     if (!path) return FALSE;
 188
 189     /* make sure msvcrt is loaded to resolve the ntoskrnl.exe forwards */
 190     LoadLibraryA( "msvcrt.dll" );
 191
 192     /* GameGuard uses an NT-style path name */
 193     str = path;
 194     if (!strncmpW( path, ntprefixW, 4 )) str += 4;
 195
 196     WINE_TRACE( "loading driver %s\n", wine_dbgstr_w(str) );
 197
 198     module = load_driver_module( str );
 199     HeapFree( GetProcessHeap(), 0, path );
 200     if (!module) return FALSE;
 201
 202     init_driver( module, &keypath );
 203     return TRUE;
 204 }
 205
 206 static DWORD WINAPI service_handler( DWORD ctrl, DWORD event_type, LPVOID event_data, LPVOID context )
 207 {
 208     SERVICE_STATUS status;
 209
 210     status.dwServiceType             = SERVICE_WIN32;
 211     status.dwControlsAccepted        = SERVICE_ACCEPT_STOP;
 212     status.dwWin32ExitCode           = 0;
 213     status.dwServiceSpecificExitCode = 0;
 214     status.dwCheckPoint              = 0;
 215     status.dwWaitHint                = 0;
 216
 217     switch(ctrl)
 218     {
 219     case SERVICE_CONTROL_STOP:
 220     case SERVICE_CONTROL_SHUTDOWN:
 221         WINE_TRACE( "shutting down %s\n", wine_dbgstr_w(driver_name) );
 222         status.dwCurrentState     = SERVICE_STOP_PENDING;
 223         status.dwControlsAccepted = 0;
 224         SetServiceStatus( service_handle, &status );
 225         SetEvent( stop_event );
 226         return NO_ERROR;
 227     default:
 228         WINE_FIXME( "got service ctrl %x for %s\n", ctrl, wine_dbgstr_w(driver_name) );
 229         status.dwCurrentState = SERVICE_RUNNING;
 230         SetServiceStatus( service_handle, &status );
 231         return NO_ERROR;
 232     }
 233 }
 234
 235 static void WINAPI ServiceMain( DWORD argc, LPWSTR *argv )
 236 {
 237     SERVICE_STATUS status;
 238
 239     WINE_TRACE( "starting service %s\n", wine_dbgstr_w(driver_name) );
 240
 241     stop_event = CreateEventW( NULL, TRUE, FALSE, NULL );
 242
 243     service_handle = RegisterServiceCtrlHandlerExW( driver_name, service_handler, NULL );
 244     if (!service_handle)
 245         return;
 246
 247     status.dwServiceType             = SERVICE_WIN32;
 248     status.dwCurrentState            = SERVICE_START_PENDING;
 249     status.dwControlsAccepted        = 0;
 250     status.dwWin32ExitCode           = 0;
 251     status.dwServiceSpecificExitCode = 0;
 252     status.dwCheckPoint              = 0;
 253     status.dwWaitHint                = 10000;
 254     SetServiceStatus( service_handle, &status );
 255
 256     if (load_driver())
 257     {
 258         status.dwCurrentState     = SERVICE_RUNNING;
 259         status.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;
 260         SetServiceStatus( service_handle, &status );
 261
 262         wine_ntoskrnl_main_loop( stop_event );
 263     }
 264     else WINE_ERR( "driver %s failed to load\n", wine_dbgstr_w(driver_name) );
 265
 266     status.dwCurrentState     = SERVICE_STOPPED;
 267     status.dwControlsAccepted = 0;
 268     SetServiceStatus( service_handle, &status );
 269     WINE_TRACE( "service %s stopped\n", wine_dbgstr_w(driver_name) );
 270 }
 271
 272 int wmain( int argc, WCHAR *argv[] )
 273 {
 274     SERVICE_TABLE_ENTRYW service_table[2];
 275
 276     if (!(driver_name = argv[1]))
 277     {
 278         WINE_ERR( "missing device name, winedevice isn't supposed to be run manually\n" );
 279         return 1;
 280     }
 281
 282     service_table[0].lpServiceName = argv[1];
 283     service_table[0].lpServiceProc = ServiceMain;
 284     service_table[1].lpServiceName = NULL;
 285     service_table[1].lpServiceProc = NULL;
 286
 287     StartServiceCtrlDispatcherW( service_table );
 288     return 0;
 289 }