dlls/ntdll/loader.c

   1 /*
   2  * Copyright 2002 Dmitry Timoshkov for Codeweavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include "winbase.h"
  20 #include "winnt.h"
  21 #include "winternl.h"
  22
  23 #include "module.h"
  24 #include "file.h"
  25 #include "wine/exception.h"
  26 #include "excpt.h"
  27 #include "wine/debug.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(ntdll);
  30
  31 /* filter for page-fault exceptions */
  32 static WINE_EXCEPTION_FILTER(page_fault)
  33 {
  34     if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
  35         return EXCEPTION_EXECUTE_HANDLER;
  36     return EXCEPTION_CONTINUE_SEARCH;
  37 }
  38
  39
  40 /******************************************************************
  41  *              LdrDisableThreadCalloutsForDll (NTDLL.@)
  42  *
  43  */
  44 NTSTATUS WINAPI LdrDisableThreadCalloutsForDll(HMODULE hModule)
  45 {
  46     WINE_MODREF *wm;
  47     NTSTATUS    ret = STATUS_SUCCESS;
  48
  49     RtlEnterCriticalSection( &loader_section );
  50
  51     wm = MODULE32_LookupHMODULE( hModule );
  52     if ( !wm )
  53         ret = STATUS_DLL_NOT_FOUND;
  54     else
  55         wm->flags |= WINE_MODREF_NO_DLL_CALLS;
  56
  57     RtlLeaveCriticalSection( &loader_section );
  58
  59     return ret;
  60 }
  61
  62 /**********************************************************************
  63  *          MODULE_FindModule
  64  *
  65  * Find a (loaded) win32 module depending on path
  66  *      LPCSTR path: [in] pathname of module/library to be found
  67  *
  68  * The loader_section must be locked while calling this function
  69  * RETURNS
  70  *      the module handle if found
  71  *      0 if not
  72  */
  73 WINE_MODREF *MODULE_FindModule(LPCSTR path)
  74 {
  75     WINE_MODREF *wm;
  76     char dllname[260], *p;
  77
  78     /* Append .DLL to name if no extension present */
  79     strcpy( dllname, path );
  80     if (!(p = strrchr( dllname, '.')) || strchr( p, '/' ) || strchr( p, '\\'))
  81             strcat( dllname, ".DLL" );
  82
  83     for ( wm = MODULE_modref_list; wm; wm = wm->next )
  84     {
  85         if ( !FILE_strcasecmp( dllname, wm->modname ) )
  86             break;
  87         if ( !FILE_strcasecmp( dllname, wm->filename ) )
  88             break;
  89         if ( !FILE_strcasecmp( dllname, wm->short_modname ) )
  90             break;
  91         if ( !FILE_strcasecmp( dllname, wm->short_filename ) )
  92             break;
  93     }
  94
  95     return wm;
  96 }
  97
  98 /******************************************************************
  99  *              LdrGetDllHandle (NTDLL.@)
 100  *
 101  *
 102  */
 103 NTSTATUS WINAPI LdrGetDllHandle(ULONG x, ULONG y, PUNICODE_STRING name, HMODULE *base)
 104 {
 105     WINE_MODREF *wm;
 106
 107     TRACE("%08lx %08lx %s %p\n",
 108           x, y, name ? debugstr_wn(name->Buffer, name->Length) : NULL, base);
 109
 110     if (x != 0 || y != 0)
 111         FIXME("Unknown behavior, please report\n");
 112
 113     /* FIXME: we should store module name information as unicode */
 114     if (name)
 115     {
 116         STRING str;
 117
 118         RtlUnicodeStringToAnsiString( &str, name, TRUE );
 119
 120         wm = MODULE_FindModule( str.Buffer );
 121         RtlFreeAnsiString( &str );
 122     }
 123     else
 124         wm = exe_modref;
 125
 126     if (!wm)
 127     {
 128         *base = 0;
 129         return STATUS_DLL_NOT_FOUND;
 130     }
 131
 132     *base = wm->module;
 133     return STATUS_SUCCESS;
 134 }
 135
 136 /***********************************************************************
 137  *           MODULE_GetProcAddress              (internal)
 138  */
 139 FARPROC MODULE_GetProcAddress(
 140         HMODULE hModule,        /* [in] current module handle */
 141         LPCSTR function,        /* [in] function to be looked up */
 142         int hint,
 143         BOOL snoop )
 144 {
 145     WINE_MODREF *wm;
 146     FARPROC     retproc = 0;
 147
 148     if (HIWORD(function))
 149         TRACE("(%p,%s (%d))\n",hModule,function,hint);
 150     else
 151         TRACE("(%p,%p)\n",hModule,function);
 152
 153     RtlEnterCriticalSection( &loader_section );
 154     if ((wm = MODULE32_LookupHMODULE( hModule )))
 155     {
 156         retproc = wm->find_export( wm, function, hint, snoop );
 157         if (!retproc) SetLastError(ERROR_PROC_NOT_FOUND);
 158     }
 159     RtlLeaveCriticalSection( &loader_section );
 160     return retproc;
 161 }
 162
 163
 164 /******************************************************************
 165  *              LdrGetProcedureAddress (NTDLL.@)
 166  *
 167  *
 168  */
 169 NTSTATUS WINAPI LdrGetProcedureAddress(HMODULE base, PANSI_STRING name, ULONG ord, PVOID *address)
 170 {
 171     WARN("%p %s %ld %p\n", base, name ? debugstr_an(name->Buffer, name->Length) : NULL, ord, address);
 172
 173     *address = MODULE_GetProcAddress( base, name ? name->Buffer : (LPSTR)ord, -1, TRUE );
 174
 175     return (*address) ? STATUS_SUCCESS : STATUS_DLL_NOT_FOUND;
 176 }
 177
 178
 179 /******************************************************************
 180  *              LdrShutdownProcess (NTDLL.@)
 181  *
 182  */
 183 NTSTATUS    WINAPI  LdrShutdownProcess(void)
 184 {
 185     TRACE("()\n");
 186     MODULE_DllProcessDetach( TRUE, (LPVOID)1 );
 187     return STATUS_SUCCESS; /* FIXME */
 188 }
 189
 190 /******************************************************************
 191  *              LdrShutdownThread (NTDLL.@)
 192  *
 193  */
 194 NTSTATUS WINAPI LdrShutdownThread(void)
 195 {
 196     WINE_MODREF *wm;
 197     TRACE("()\n");
 198
 199     /* don't do any detach calls if process is exiting */
 200     if (process_detaching) return STATUS_SUCCESS;
 201     /* FIXME: there is still a race here */
 202
 203     RtlEnterCriticalSection( &loader_section );
 204
 205     for ( wm = MODULE_modref_list; wm; wm = wm->next )
 206     {
 207         if ( !(wm->flags & WINE_MODREF_PROCESS_ATTACHED) )
 208             continue;
 209         if ( wm->flags & WINE_MODREF_NO_DLL_CALLS )
 210             continue;
 211
 212         MODULE_InitDLL( wm, DLL_THREAD_DETACH, NULL );
 213     }
 214
 215     RtlLeaveCriticalSection( &loader_section );
 216     return STATUS_SUCCESS; /* FIXME */
 217 }
 218
 219 /***********************************************************************
 220  *           RtlImageNtHeader   (NTDLL.@)
 221  */
 222 PIMAGE_NT_HEADERS WINAPI RtlImageNtHeader(HMODULE hModule)
 223 {
 224     IMAGE_NT_HEADERS *ret;
 225
 226     __TRY
 227     {
 228         IMAGE_DOS_HEADER *dos = (IMAGE_DOS_HEADER *)hModule;
 229
 230         ret = NULL;
 231         if (dos->e_magic == IMAGE_DOS_SIGNATURE)
 232         {
 233             ret = (IMAGE_NT_HEADERS *)((char *)dos + dos->e_lfanew);
 234             if (ret->Signature != IMAGE_NT_SIGNATURE) ret = NULL;
 235         }
 236     }
 237     __EXCEPT(page_fault)
 238     {
 239         return NULL;
 240     }
 241     __ENDTRY
 242     return ret;
 243 }
 244
 245
 246 /***********************************************************************
 247  *           RtlImageDirectoryEntryToData   (NTDLL.@)
 248  */
 249 PVOID WINAPI RtlImageDirectoryEntryToData( HMODULE module, BOOL image, WORD dir, ULONG *size )
 250 {
 251     const IMAGE_NT_HEADERS *nt;
 252     DWORD addr;
 253
 254     if ((ULONG_PTR)module & 1)  /* mapped as data file */
 255     {
 256         module = (HMODULE)((ULONG_PTR)module & ~1);
 257         image = FALSE;
 258     }
 259     if (!(nt = RtlImageNtHeader( module ))) return NULL;
 260     if (dir >= nt->OptionalHeader.NumberOfRvaAndSizes) return NULL;
 261     if (!(addr = nt->OptionalHeader.DataDirectory[dir].VirtualAddress)) return NULL;
 262     *size = nt->OptionalHeader.DataDirectory[dir].Size;
 263     if (image || addr < nt->OptionalHeader.SizeOfHeaders) return (char *)module + addr;
 264
 265     /* not mapped as image, need to find the section containing the virtual address */
 266     return RtlImageRvaToVa( nt, module, addr, NULL );
 267 }
 268
 269
 270 /***********************************************************************
 271  *           RtlImageRvaToSection   (NTDLL.@)
 272  */
 273 PIMAGE_SECTION_HEADER WINAPI RtlImageRvaToSection( const IMAGE_NT_HEADERS *nt,
 274                                                    HMODULE module, DWORD rva )
 275 {
 276     int i;
 277     IMAGE_SECTION_HEADER *sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader +
 278                                                         nt->FileHeader.SizeOfOptionalHeader);
 279     for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
 280     {
 281         if ((sec->VirtualAddress <= rva) && (sec->VirtualAddress + sec->SizeOfRawData > rva))
 282             return sec;
 283     }
 284     return NULL;
 285 }
 286
 287
 288 /***********************************************************************
 289  *           RtlImageRvaToVa   (NTDLL.@)
 290  */
 291 PVOID WINAPI RtlImageRvaToVa( const IMAGE_NT_HEADERS *nt, HMODULE module,
 292                               DWORD rva, IMAGE_SECTION_HEADER **section )
 293 {
 294     IMAGE_SECTION_HEADER *sec;
 295
 296     if (section && *section)  /* try this section first */
 297     {
 298         sec = *section;
 299         if ((sec->VirtualAddress <= rva) && (sec->VirtualAddress + sec->SizeOfRawData > rva))
 300             goto found;
 301     }
 302     if (!(sec = RtlImageRvaToSection( nt, module, rva ))) return NULL;
 303  found:
 304     if (section) *section = sec;
 305     return (char *)module + sec->PointerToRawData + (rva - sec->VirtualAddress);
 306 }