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wow64: Get the backend dll name from the registry.

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This commit is contained in:
Alexandre Julliard 2023-03-02 18:13:38 +01:00
parent 7611492ddc
commit b57af3ebca
1 changed files with 25 additions and 2 deletions
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27
dlls/wow64/syscall.c
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@ -712,16 +712,39 @@ static HMODULE load_64bit_module( const WCHAR *name )
*/
static const WCHAR *get_cpu_dll_name(void)
{
static ULONG buffer[32];
KEY_VALUE_PARTIAL_INFORMATION *info = (KEY_VALUE_PARTIAL_INFORMATION *)buffer;
OBJECT_ATTRIBUTES attr;
UNICODE_STRING nameW;
const WCHAR *ret;
HANDLE key;
ULONG size;
switch (current_machine)
{
case IMAGE_FILE_MACHINE_I386:
return (native_machine == IMAGE_FILE_MACHINE_ARM64 ? L"xtajit.dll" : L"wow64cpu.dll");
RtlInitUnicodeString( &nameW, L"\\Registry\\Machine\\Software\\Microsoft\\Wow64\\x86" );
ret = (native_machine == IMAGE_FILE_MACHINE_ARM64 ? L"xtajit.dll" : L"wow64cpu.dll");
break;
case IMAGE_FILE_MACHINE_ARMNT:
return L"wowarmhw.dll";
RtlInitUnicodeString( &nameW, L"\\Registry\\Machine\\Software\\Microsoft\\Wow64\\arm" );
ret = L"wowarmhw.dll";
break;
default:
ERR( "unsupported machine %04x\n", current_machine );
RtlExitUserProcess( 1 );
}
InitializeObjectAttributes( &attr, &nameW, OBJ_CASE_INSENSITIVE, 0, NULL );
if (NtOpenKey( &key, KEY_READ | KEY_WOW64_64KEY, &attr )) return ret;
RtlInitUnicodeString( &nameW, L"" );
size = sizeof(buffer) - sizeof(WCHAR);
if (!NtQueryValueKey( key, &nameW, KeyValuePartialInformation, buffer, size, &size ) && info->Type == REG_SZ)
{
((WCHAR *)info->Data)[info->DataLength / sizeof(WCHAR)] = 0;
ret = (WCHAR *)info->Data;
}
NtClose( key );
return ret;
}