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.

Requirements

See also

Thread Environment Block (Debugging Notes)

WOW64_FLOATING_SAVE_AREA

Wow64GetThreadContext

Wow64SetThreadContext