ntdll: Add a helper to launch start.exe always as builtin.

dlls/ntdll/unix/env.c

@@ -1880,23 +1880,17 @@ static RTL_USER_PROCESS_PARAMETERS *build_initial_params(void)
 
     if (status)  /* try launching it through start.exe */
     {
-        static const WCHAR startW[] = {'C',':','\\','w','i','n','d','o','w','s','\\',
-            's','y','s','t','e','m','3','2','\\','s','t','a','r','t','.','e','x','e',0};
         static const WCHAR slashwW[] = {'/','w',0};
         static const WCHAR slashbW[] = {'/','b',0};
-        const WCHAR *args[] = { startW, slashwW, slashbW };
+        const WCHAR *args[] = { NULL, slashwW, slashbW };
 
         free( image );
         prepend_main_wargv( args, 3 );
-        if ((status = load_main_exe( startW, NULL, curdir, &image, &module, &image_info )))
-        {
-            MESSAGE( "wine: failed to start %s\n", debugstr_w(main_wargv[2]) );
-            NtTerminateProcess( GetCurrentProcess(), status );
-        }
+        load_start_exe( &image, &module, &image_info );
     }
-    else main_wargv[0] = get_dos_path( image );
 
     NtCurrentTeb()->Peb->ImageBaseAddress = module;
+    main_wargv[0] = get_dos_path( image );
     cmdline = build_command_line( main_wargv );
 
     TRACE( "image %s cmdline %s dir %s\n",

dlls/ntdll/unix/loader.c

@@ -1544,6 +1544,32 @@ failed:
 }
 
 
+/***********************************************************************
+ *           load_start_exe
+ *
+ * Load start.exe as main image.
+ */
+NTSTATUS load_start_exe( WCHAR **image, void **module, SECTION_IMAGE_INFORMATION *image_info )
+{
+    static const WCHAR startW[] = {'\\','?','?','\\','C',':','\\','w','i','n','d','o','w','s','\\',
+        's','y','s','t','e','m','3','2','\\','s','t','a','r','t','.','e','x','e',0};
+    UNICODE_STRING nt_name;
+    NTSTATUS status;
+    SIZE_T size;
+
+    init_unicode_string( &nt_name, startW );
+    status = find_builtin_dll( &nt_name, module, &size, image_info, current_machine, FALSE );
+    if (status)
+    {
+        MESSAGE( "wine: failed to load start.exe: %x\n", status );
+        NtTerminateProcess( GetCurrentProcess(), status );
+    }
+    *image = malloc( sizeof(startW) );
+    memcpy( *image, startW, sizeof(startW) );
+    return status;
+}
+
+
 #ifdef __FreeBSD__
 /* The PT_LOAD segments are sorted in increasing order, and the first
  * starts at the beginning of the ELF file. By parsing the file, we can

dlls/ntdll/unix/unix_private.h

@@ -145,6 +145,7 @@ extern NTSTATUS load_builtin( const pe_image_info_t *image_info, const WCHAR *fi
                               void **addr_ptr, SIZE_T *size_ptr ) DECLSPEC_HIDDEN;
 extern NTSTATUS load_main_exe( const WCHAR *name, const char *unix_name, const WCHAR *curdir, WCHAR **image,
                                void **module, SECTION_IMAGE_INFORMATION *image_info ) DECLSPEC_HIDDEN;
+extern NTSTATUS load_start_exe( WCHAR **image, void **module, SECTION_IMAGE_INFORMATION *image_info ) DECLSPEC_HIDDEN;
 extern void start_server( BOOL debug ) DECLSPEC_HIDDEN;
 extern ULONG_PTR get_image_address(void) DECLSPEC_HIDDEN;