/*++ BUILD Version: 0001    // Increment this if a change has global effects

Copyright (c) Microsoft Corporation.  All rights reserved.

Module Name:

    wow64t.h

Abstract:

    32-bit structure definitions for 64-bit NT.

Author:

    Barry Bond (barrybo)   20-Jun-1998

Revision History:

--*/

#ifndef _WOW64T_
#define _WOW64T_


//
// Page size on x86 NT
//
#define PAGE_SIZE_X86NT    0x1000
#define PAGE_SHIFT_X86NT   12L

//
// Conver the number of native pages to sub x86-pages
//
#define Wow64GetNumberOfX86Pages(NativePages)    \
        (NativePages * (PAGE_SIZE >> PAGE_SHIFT_X86NT))


// The name of the 32-bit system directory, which is a child of %SystemRoot%
#define WOW64_SYSTEM_DIRECTORY      "syswow64"
#define WOW64_SYSTEM_DIRECTORY_U   L"syswow64"

// Length in bytes of the new system directory, not counting a
// null terminator
//
#define WOW64_SYSTEM_DIRECTORY_SIZE (sizeof(WOW64_SYSTEM_DIRECTORY)-sizeof(CHAR))
#define WOW64_SYSTEM_DIRECTORY_U_SIZE (sizeof(WOW64_SYSTEM_DIRECTORY_U)-sizeof(WCHAR))

#define WOW64_X86_TAG               " (x86)"
#define WOW64_X86_TAG_U            L" (x86)"

#define TYPE32(x)   ULONG
#define TYPE64(x)   ULONGLONG

//
// Wow64Info structure is shared between 32-bit and 64-bit modules inside a Wow64 process.
// NOTE : This structure shouldn't contain any pointer-dependent data, as 
// it is viewed from 32-bit and 64-bit code.
//
typedef struct _WOW64INFO {

    ULONG NativeSystemPageSize;         // Page size of the native system the emulator is running on.
    
    ULONG CpuFlags;

} WOW64INFO, *PWOW64INFO;


typedef struct _PEB_LDR_DATA32 {
    ULONG Length;
    BOOLEAN Initialized;
    TYPE32(HANDLE) SsHandle;
    LIST_ENTRY32 InLoadOrderModuleList;
    LIST_ENTRY32 InMemoryOrderModuleList;
    LIST_ENTRY32 InInitializationOrderModuleList;
    TYPE32(PVOID) EntryInProgress;
} PEB_LDR_DATA32, *PPEB_LDR_DATA32;

typedef struct _GDI_TEB_BATCH32 {
    ULONG    Offset;
    TYPE32(ULONG_PTR) HDC;
    ULONG    Buffer[GDI_BATCH_BUFFER_SIZE];
} GDI_TEB_BATCH32,*PGDI_TEB_BATCH32;


typedef struct _GDI_TEB_BATCH64 {
    ULONG    Offset;
    TYPE64(ULONG_PTR) HDC;
    ULONG    Buffer[GDI_BATCH_BUFFER_SIZE];
} GDI_TEB_BATCH64,*PGDI_TEB_BATCH64;


typedef struct _Wx86ThreadState32 {
    TYPE32(PULONG)  CallBx86Eip;
    TYPE32(PVOID)   DeallocationCpu;
    BOOLEAN UseKnownWx86Dll;
    char    OleStubInvoked;
} WX86THREAD32, *PWX86THREAD32;

typedef struct _Wx86ThreadState64 {
    TYPE64(PULONG)  CallBx86Eip;
    TYPE64(PVOID)   DeallocationCpu;
    BOOLEAN UseKnownWx86Dll;
    char    OleStubInvoked;
} WX86THREAD64, *PWX86THREAD64;

typedef struct _CLIENT_ID32 {
    TYPE32(HANDLE)  UniqueProcess;
    TYPE32(HANDLE)  UniqueThread;
} CLIENT_ID32;

typedef CLIENT_ID32 *PCLIENT_ID32;

#if !defined(CLIENT_ID64_DEFINED)

typedef struct _CLIENT_ID64 {
    TYPE64(HANDLE)  UniqueProcess;
    TYPE64(HANDLE)  UniqueThread;
} CLIENT_ID64;

typedef CLIENT_ID64 *PCLIENT_ID64;

#define CLIENT_ID64_DEFINED

#endif

typedef ULONG GDI_HANDLE_BUFFER32[GDI_HANDLE_BUFFER_SIZE32];
typedef ULONG GDI_HANDLE_BUFFER64[GDI_HANDLE_BUFFER_SIZE64];

#define PEBTEB_BITS 32
#include "pebteb.h"
#undef PEBTEB_BITS

#define PEBTEB_BITS 64
#include "pebteb.h"
#undef PEBTEB_BITS

typedef struct _RTL_DRIVE_LETTER_CURDIR32 {
    USHORT Flags;
    USHORT Length;
    ULONG TimeStamp;
    STRING32 DosPath;
} RTL_DRIVE_LETTER_CURDIR32, *PRTL_DRIVE_LETTER_CURDIR32;


typedef struct _CURDIR32 {
    UNICODE_STRING32 DosPath;
    TYPE32(HANDLE) Handle;
} CURDIR32, *PCURDIR32;



typedef struct _RTL_USER_PROCESS_PARAMETERS32 {
    ULONG MaximumLength;
    ULONG Length;

    ULONG Flags;
    ULONG DebugFlags;

    TYPE32(HANDLE) ConsoleHandle;
    ULONG  ConsoleFlags;
    TYPE32(HANDLE) StandardInput;
    TYPE32(HANDLE) StandardOutput;
    TYPE32(HANDLE) StandardError;

    CURDIR32 CurrentDirectory;        // ProcessParameters
    UNICODE_STRING32 DllPath;         // ProcessParameters
    UNICODE_STRING32 ImagePathName;   // ProcessParameters
    UNICODE_STRING32 CommandLine;     // ProcessParameters
    TYPE32(PVOID) Environment;              // NtAllocateVirtualMemory

    ULONG StartingX;
    ULONG StartingY;
    ULONG CountX;
    ULONG CountY;
    ULONG CountCharsX;
    ULONG CountCharsY;
    ULONG FillAttribute;

    ULONG WindowFlags;
    ULONG ShowWindowFlags;
    UNICODE_STRING32 WindowTitle;     // ProcessParameters
    UNICODE_STRING32 DesktopInfo;     // ProcessParameters
    UNICODE_STRING32 ShellInfo;       // ProcessParameters
    UNICODE_STRING32 RuntimeData;     // ProcessParameters
    RTL_DRIVE_LETTER_CURDIR32 CurrentDirectores[ RTL_MAX_DRIVE_LETTERS ];
} RTL_USER_PROCESS_PARAMETERS32, *PRTL_USER_PROCESS_PARAMETERS32;

#if !defined(BUILD_WOW6432)

//
// Macros to encapsulate fields that are used to store the TEB.
// They are kernel safe since the 64BIT TEB is locked down in memory
// and cann't be moved or decommited until the thread dies.

#define WOW64_GET_TEB32(teb64) \
        ((PTEB32)((teb64)->NtTib.ExceptionList))

//
// Update the first qword in the 64-bit TEB.  The 32-bit rdteb instruction
// reads the TEB32 pointer value directly from this field.
//
#define WOW64_SET_TEB32(teb64, teb32) \
   (teb64)->NtTib.ExceptionList = (struct _EXCEPTION_REGISTRATION_RECORD *)(teb32);


#define WOW64_TEB32_POINTER_ADDRESS(teb64) \
        (PVOID)&((teb64)->NtTib.ExceptionList)


#endif

//
// Thunk macros

#define UStr32ToUStr(dst, src) { (dst)->Length = (src)->Length; \
                                 (dst)->MaximumLength = (src)->MaximumLength; \
                                 (dst)->Buffer = (PWSTR) ((src)->Buffer); }

#define UStrToUStr32(dst, src) { (dst)->Length = (src)->Length; \
                                 (dst)->MaximumLength = (src)->MaximumLength; \
                                 (dst)->Buffer = (ULONG) ((src)->Buffer); }

#define NtCurrentTeb32()  ((PTEB32) (NtCurrentTeb()->NtTib.ExceptionList) )
#define NtCurrentPeb32()  ((PPEB32) (NtCurrentTeb32()->ProcessEnvironmentBlock) )


// This is currently defined in windows\core\w32inc\w32wow64.h:
#define NtCurrentTeb64()   ((PTEB64)((PTEB32)NtCurrentTeb())->GdiBatchCount)

// This is currently defined in base\wow64\inc\wow64.h:
#define WOW64_TLS_FILESYSREDIR      8   // Used to enable/disable the filesystem
#define WOW64_TLS_WOW64INFO        10   // Used to access native system information for wow64 processes.


// These should only be called from Win32 code known to be running on Win64.
#if !_WIN64
#define Wow64EnableFilesystemRedirector()   \
    NtCurrentTeb64()->TlsSlots[WOW64_TLS_FILESYSREDIR] = 0;

#define Wow64DisableFilesystemRedirector(filename)  \
    NtCurrentTeb64()->TlsSlots[WOW64_TLS_FILESYSREDIR] = (ULONGLONG)(ULONG)filename;

//
// Wow64Info is accessed only from compiled code for x86 on win64.
// NOTE: Only Wow64 processes are allowed to call these macros.
//

#define Wow64GetSharedInfo()    ((PWOW64INFO)NtCurrentTeb64()->TlsSlots[WOW64_TLS_WOW64INFO])

#define Wow64GetSystemNativePageSize() \
    ((PWOW64INFO)(NtCurrentTeb64()->TlsSlots[WOW64_TLS_WOW64INFO]))->NativeSystemPageSize
    
#else

#define Wow64GetSharedInfo()    ((PWOW64INFO)NtCurrentTeb()->TlsSlots[WOW64_TLS_WOW64INFO])

#endif


#endif  // _WOW64T_