typedef struct _NT_TIB                                                          // 8 / 8 elements; 0x001C / 0x0038 Bytes
{
    PEXCEPTION_REGISTRATION_RECORD 
                                ExceptionList;                                  // 0x0000 / 0x0000; 0x0004 / 0x0008 Bytes
    PVOID                       StackBase;                                      // 0x0004 / 0x0008; 0x0004 / 0x0008 Bytes
    PVOID                       StackLimit;                                     // 0x0008 / 0x0010; 0x0004 / 0x0008 Bytes
    PVOID                       SubSystemTib;                                   // 0x000C / 0x0018; 0x0004 / 0x0008 Bytes
    union                                                                       // 2 / 2 elements; 0x0004 / 0x0008 Bytes
    {
        PVOID                   FiberData;                                      // 0x0010 / 0x0020; 0x0004 / 0x0008 Bytes
        ULONG32                 Version;                                        // 0x0010 / 0x0020; 0x0004 / 0x0004 Bytes
    };
    PVOID                       ArbitraryUserPointer;                           // 0x0014 / 0x0028; 0x0004 / 0x0008 Bytes
    PNT_TIB                     Self;                                           // 0x0018 / 0x0030; 0x0004 / 0x0008 Bytes
} NT_TIB, * PNT_TIB;

Return to OS-specific structures/unions/enums list.
Return to OS version list.