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winedevice: Apply relocations to the driver in cases where the loader doesn't do it.

This commit is contained in:
Alexandre Julliard 2008-04-02 20:40:27 +02:00
parent ce21f2924f
commit 52ca8cd3ce
1 changed files with 50 additions and 1 deletions
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51
programs/winedevice/device.c
View File

@ -18,6 +18,9 @@
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <stdarg.h>
#include "ntstatus.h"
@ -58,6 +61,52 @@ static LDR_MODULE *find_ldr_module( HMODULE module )
return NULL;
}
/* load the driver module file */
static HMODULE load_driver_module( const WCHAR *name )
{
const IMAGE_NT_HEADERS *nt;
size_t page_size = getpagesize();
int delta;
HMODULE module = LoadLibraryW( name );
if (!module) return NULL;
nt = RtlImageNtHeader( module );
if (!(delta = (char *)module - (char *)nt->OptionalHeader.ImageBase)) return module;
/* the loader does not apply relocations to non page-aligned binaries or executables,
* we have to do it ourselves */
if (nt->OptionalHeader.SectionAlignment < page_size ||
!(nt->FileHeader.Characteristics & IMAGE_FILE_DLL))
{
ULONG size;
DWORD old;
IMAGE_BASE_RELOCATION *rel, *end;
if ((rel = RtlImageDirectoryEntryToData( module, TRUE, IMAGE_DIRECTORY_ENTRY_BASERELOC, &size )))
{
WINE_TRACE( "%s: relocating from %p to %p\n",
wine_dbgstr_w(name), (char *)module - delta, module );
end = (IMAGE_BASE_RELOCATION *)((char *)rel + size);
while (rel < end && rel->SizeOfBlock)
{
void *page = (char *)module + rel->VirtualAddress;
VirtualProtect( page, page_size, PAGE_EXECUTE_READWRITE, &old );
rel = LdrProcessRelocationBlock( page, (rel->SizeOfBlock - sizeof(*rel)) / sizeof(USHORT),
(USHORT *)(rel + 1), delta );
if (old != PAGE_EXECUTE_READWRITE) VirtualProtect( page, page_size, old, NULL );
if (!rel) goto error;
}
}
}
return module;
error:
FreeLibrary( module );
return NULL;
}
/* call the driver init entry point */
static NTSTATUS init_driver( HMODULE module, UNICODE_STRING *keyname )
{
@ -146,7 +195,7 @@ static BOOL load_driver(void)
WINE_TRACE( "loading driver %s\n", wine_dbgstr_w(str) );
module = LoadLibraryW( str );
module = load_driver_module( str );
HeapFree( GetProcessHeap(), 0, path );
if (!module) return FALSE;