WOW64_CONTEXT structure (winnt.h)
Represents a context frame on WOW64. Refer to the header file WinNT.h for the definition of this structure.
Syntax
typedef struct _WOW64_CONTEXT {
DWORD ContextFlags;
DWORD Dr0;
DWORD Dr1;
DWORD Dr2;
DWORD Dr3;
DWORD Dr6;
DWORD Dr7;
WOW64_FLOATING_SAVE_AREA FloatSave;
DWORD 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;
BYTE ExtendedRegisters[WOW64_MAXIMUM_SUPPORTED_EXTENSION];
} WOW64_CONTEXT;
Members
ContextFlags
Dr0
Dr1
Dr2
Dr3
Dr6
Dr7
FloatSave
SegGs
SegFs
SegEs
SegDs
Edi
Esi
Ebx
Edx
Ecx
Eax
Ebp
Eip
SegCs
EFlags
Esp
SegSs
ExtendedRegisters[WOW64_MAXIMUM_SUPPORTED_EXTENSION]
Remarks
In the following versions of Windows, Slot 1 of Thread Local Storage (TLS) holds a pointer to a structure that contains a WOW64_CONTEXT structure starting at offset 4. This might change in later versions of Windows.
| Windows Vista | Windows Server 2008 |
| Windows 7 | Windows Server 2008 R2 |
| Windows 8 | Windows Server 2012 |
| Windows 8.1 | Windows Server 2012 R2 |
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows Vista [desktop apps only] |
| Minimum supported server | Windows Server 2008 [desktop apps only] |
| Header | winnt.h (include Windows.h) |