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#+build windows
package sys_windows

foreign import kernel32 "system:Kernel32.lib"

@(default_calling_convention="system")
foreign kernel32 {
	GetSystemWow64Directory2W         :: proc(lpBuffer: LPWSTR, uSize: UINT, ImageFileMachineTyp: WORD) -> UINT ---
	GetSystemWow64DirectoryW          :: proc(lpBuffer: LPWSTR, uSize: UINT) -> UINT ---
	IsWow64GuestMachineSupported      :: proc(WowGuestMachine: USHORT, MachineIsSupported: ^BOOL) -> HRESULT ---
	IsWow64Process                    :: proc(hProcess: HANDLE, Wow64Process: PBOOL) -> BOOL ---
	IsWow64Process2                   :: proc(hProcess: HANDLE, pProcessMachine: ^USHORT, pNativeMachine: ^USHORT) -> BOOL ---
	Wow64EnableWow64FsRedirection     :: proc(Wow64FsEnableRedirection: BOOLEAN) -> BOOLEAN ---
	Wow64DisableWow64FsRedirection    :: proc(OldValue: ^PVOID) -> BOOL ---
	Wow64RevertWow64FsRedirection     :: proc(OlValue: PVOID) -> BOOL ---
	Wow64GetThreadContext             :: proc(hThread: HANDLE, lpContext: PWOW64_CONTEXT) -> BOOL ---
	Wow64SetThreadContext             :: proc(hThread: HANDLE, lpContext: ^WOW64_CONTEXT) -> BOOL ---
	Wow64SetThreadDefaultGuestMachine :: proc(Machine: USHORT) -> USHORT ---
	Wow64SuspendThread                :: proc(hThread: HANDLE) -> DWORD ---
}

WOW64_CONTEXT_i386 :: 0x00010000

WOW64_CONTEXT_CONTROL  :: (WOW64_CONTEXT_i386 | 0x00000001)
WOW64_CONTEXT_INTEGER  :: (WOW64_CONTEXT_i386 | 0x00000002)
WOW64_CONTEXT_SEGMENTS :: (WOW64_CONTEXT_i386 | 0x00000004)

WOW64_CONTEXT_FLOATING_POINT     :: (WOW64_CONTEXT_i386 | 0x00000008)
WOW64_CONTEXT_DEBUG_REGISTERS    :: (WOW64_CONTEXT_i386 | 0x00000010)
WOW64_CONTEXT_EXTENDED_REGISTERS :: (WOW64_CONTEXT_i386 | 0x00000020)
WOW64_CONTEXT_FULL               :: (WOW64_CONTEXT_CONTROL | WOW64_CONTEXT_INTEGER | WOW64_CONTEXT_SEGMENTS)
WOW64_CONTEXT_ALL :: (
	WOW64_CONTEXT_CONTROL |
	WOW64_CONTEXT_INTEGER |
	WOW64_CONTEXT_SEGMENTS |
	WOW64_CONTEXT_FLOATING_POINT |
	WOW64_CONTEXT_DEBUG_REGISTERS |
	WOW64_CONTEXT_EXTENDED_REGISTERS)

WOW64_SIZE_OF_80387_REGISTERS ::  80
WOW64_MAXIMUM_SUPPORTED_EXTENSION ::  512

WOW64_CONTEXT :: struct {
	ContextFlags:      DWORD,
	Dr0:               DWORD,
	Dr1:               DWORD,
	Dr2:               DWORD,
	Dr3:               DWORD,
	Dr6:               DWORD,
	Dr7:               DWORD,
	FloatSave:         WOW64_FLOATING_SAVE_AREA,
	SegGs:             DWORD,
	SegFs:             DWORD,
	SegEs:             DWORD,
	SegDs:             DWORD,
	Edi:               DWORD,
	Esi:               DWORD,
	Ebx:               DWORD,
	Edx:               DWORD,
	Ecx:               DWORD,
	Eax:               DWORD,
	Ebp:               DWORD,
	Eip:               DWORD,
	SegCs:             DWORD,
	EFlags:            DWORD,
	Esp:               DWORD,
	SegSs:             DWORD,
	ExtendedRegisters: [WOW64_MAXIMUM_SUPPORTED_EXTENSION]BYTE,
}

PWOW64_CONTEXT :: ^WOW64_CONTEXT

WOW64_FLOATING_SAVE_AREA :: struct {
	ControlWord:   DWORD,
	StatusWord:    DWORD,
	TagWord:       DWORD,
	ErrorOffset:   DWORD,
	ErrorSelector: DWORD,
	DataOffset:    DWORD,
	DataSelector:  DWORD,
	RegisterArea:  [WOW64_SIZE_OF_80387_REGISTERS]BYTE,
	Cr0NpxState:   DWORD,
}

PWOW64_FLOATING_SAVE_AREA :: ^WOW64_FLOATING_SAVE_AREA