dlls/winecrt0/delay_load.c

   1 /*
   2  * Support for delayed imports
   3  *
   4  * Copyright 2005 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 <stdarg.h>
  22 #include "windef.h"
  23 #include "winbase.h"
  24 #include "delayloadhandler.h"
  25
  26 WINBASEAPI void *WINAPI DelayLoadFailureHook( LPCSTR name, LPCSTR function );
  27 WINBASEAPI void *WINAPI ResolveDelayLoadedAPI( void* base, const IMAGE_DELAYLOAD_DESCRIPTOR* desc,
  28                                                PDELAYLOAD_FAILURE_DLL_CALLBACK dllhook,
  29                                                PDELAYLOAD_FAILURE_SYSTEM_ROUTINE syshook,
  30                                                IMAGE_THUNK_DATA* addr, ULONG flags );
  31
  32 static inline void *image_base(void)
  33 {
  34 #ifdef __WINE_PE_BUILD
  35     extern IMAGE_DOS_HEADER __ImageBase;
  36     return (void *)&__ImageBase;
  37 #else
  38     extern IMAGE_NT_HEADERS __wine_spec_nt_header;
  39     return (void *)((__wine_spec_nt_header.OptionalHeader.ImageBase + 0xffff) & ~0xffff);
  40 #endif
  41 }
  42
  43 FARPROC WINAPI __delayLoadHelper2( const IMAGE_DELAYLOAD_DESCRIPTOR *descr, IMAGE_THUNK_DATA *addr )
  44 {
  45     return ResolveDelayLoadedAPI( image_base(), descr, NULL, DelayLoadFailureHook, addr, 0 );
  46 }