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Polynomial
Grandmaster Cheater

Reputation: 5

Joined: 17 Feb 2008
Posts: 524
Location: Inside the Intel CET shadow stack

Posted: Thu Apr 08, 2010 1:44 pm Post subject:

I've got the WDK v7600 installed, I'll check the header file.

Update:

Code:

typedef struct _CONTEXT {
//
// The flags values within this flag control the contents of
// a CONTEXT record.
//
// If the context record is used as an input parameter, then
// for each portion of the context record controlled by a flag
// whose value is set, it is assumed that that portion of the
// context record contains valid context. If the context record
// is being used to modify a threads context, then only that
// portion of the threads context will be modified.
//
// If the context record is used as an IN OUT parameter to capture
// the context of a thread, then only those portions of the thread's
// context corresponding to set flags will be returned.
//
// The context record is never used as an OUT only parameter.
//

DWORD ContextFlags;

//
// This section is specified/returned if CONTEXT_DEBUG_REGISTERS is
// set in ContextFlags. Note that CONTEXT_DEBUG_REGISTERS is NOT
// included in CONTEXT_FULL.
//

DWORD Dr0;
DWORD Dr1;
DWORD Dr2;
DWORD Dr3;
DWORD Dr6;
DWORD Dr7;

//
// This section is specified/returned if the
// ContextFlags word contians the flag CONTEXT_FLOATING_POINT.
//

FLOATING_SAVE_AREA FloatSave;

//
// This section is specified/returned if the
// ContextFlags word contians the flag CONTEXT_SEGMENTS.
//

DWORD SegGs;
DWORD SegFs;
DWORD SegEs;
DWORD SegDs;

//
// This section is specified/returned if the
// ContextFlags word contians the flag CONTEXT_INTEGER.
//

DWORD Edi;
DWORD Esi;
DWORD Ebx;
DWORD Edx;
DWORD Ecx;
DWORD Eax;

//
// This section is specified/returned if the
// ContextFlags word contians the flag CONTEXT_CONTROL.
//

DWORD Ebp;
DWORD Eip;
DWORD SegCs; // MUST BE SANITIZED
DWORD EFlags; // MUST BE SANITIZED
DWORD Esp;
DWORD SegSs;

//
// This section is specified/returned if the ContextFlags word
// contains the flag CONTEXT_EXTENDED_REGISTERS.
// The format and contexts are processor specific
//

BYTE ExtendedRegisters[MAXIMUM_SUPPORTED_EXTENSION];

} CONTEXT;

Looks like it stores xmm1 and such in the extended registers.
_________________

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