CONTEXT structure

typedef struct DECLSPEC_ALIGN(8) _CONTEXT { // // Control flags. // DWORD ContextFlags; // // Integer registers // DWORD R0; DWORD R1; DWORD R2; DWORD R3; DWORD R4; DWORD R5; DWORD R6; DWORD R7; DWORD R8; DWORD R9; DWORD R10; DWORD R11; DWORD R12; // // Control Registers // DWORD Sp; DWORD Lr; DWORD Pc; DWORD Cpsr; // // Floating Point/NEON Registers // DWORD Fpscr; DWORD Padding; union { NEON128 Q[16]; ULONGLONG D[32]; DWORD S[32]; } DUMMYUNIONNAME; // // Debug registers // DWORD Bvr[ARM_MAX_BREAKPOINTS]; DWORD Bcr[ARM_MAX_BREAKPOINTS]; DWORD Wvr[ARM_MAX_WATCHPOINTS]; DWORD Wcr[ARM_MAX_WATCHPOINTS]; DWORD Padding2[2]; } CONTEXT, *PCONTEXT;

typedef struct DECLSPEC_ALIGN(16) _CONTEXT {
//
// Register parameter home addresses.
//
// N.B. These fields are for convience - they could be used to extend the
// context record in the future.
//
DWORD64 P1Home;
DWORD64 P2Home;
DWORD64 P3Home;
DWORD64 P4Home;
DWORD64 P5Home;
DWORD64 P6Home;
//
// Control flags.
//
DWORD ContextFlags;
DWORD MxCsr;
//
// Segment Registers and processor flags.
//
WORD SegCs;
WORD SegDs;
WORD SegEs;
WORD SegFs;
WORD SegGs;
WORD SegSs;
DWORD EFlags;
//
// Debug registers
//
DWORD64 Dr0;
DWORD64 Dr1;
DWORD64 Dr2;
DWORD64 Dr3;
DWORD64 Dr6;
DWORD64 Dr7;
//
// Integer registers.
//
DWORD64 Rax;
DWORD64 Rcx;
DWORD64 Rdx;
DWORD64 Rbx;
DWORD64 Rsp;
DWORD64 Rbp;
DWORD64 Rsi;
DWORD64 Rdi;
DWORD64 R8;
DWORD64 R9;
DWORD64 R10;
DWORD64 R11;
DWORD64 R12;
DWORD64 R13;
DWORD64 R14;
DWORD64 R15;
//
// Program counter.
//
DWORD64 Rip;
//
// Floating point state.
//
union {
XMM_SAVE_AREA32 FltSave;
struct {
M128A Header[2];
M128A Legacy[8];
M128A Xmm0;
M128A Xmm1;
M128A Xmm2;
M128A Xmm3;
M128A Xmm4;
M128A Xmm5;
M128A Xmm6;
M128A Xmm7;
M128A Xmm8;
M128A Xmm9;
M128A Xmm10;
M128A Xmm11;
M128A Xmm12;
M128A Xmm13;
M128A Xmm14;
M128A Xmm15;
} DUMMYSTRUCTNAME;
} DUMMYUNIONNAME;
//
// Vector registers.
//
M128A VectorRegister[26];
DWORD64 VectorControl;
//
// Special debug control registers.
//
DWORD64 DebugControl;
DWORD64 LastBranchToRip;
DWORD64 LastBranchFromRip;
DWORD64 LastExceptionToRip;
DWORD64 LastExceptionFromRip;
} CONTEXT, *PCONTEXT;

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;

typedef struct {
double Fpr0;
double Fpr1;
double Fpr2;
double Fpr3;
double Fpr4;
double Fpr5;
double Fpr6;
double Fpr7;
double Fpr8;
double Fpr9;
double Fpr10;
double Fpr11;
double Fpr12;
double Fpr13;
double Fpr14;
double Fpr15;
double Fpr16;
double Fpr17;
double Fpr18;
double Fpr19;
double Fpr20;
double Fpr21;
double Fpr22;
double Fpr23;
double Fpr24;
double Fpr25;
double Fpr26;
double Fpr27;
double Fpr28;
double Fpr29;
double Fpr30;
double Fpr31;
double Fpscr;
DWORD Gpr0;
DWORD Gpr1;
DWORD Gpr2;
DWORD Gpr3;
DWORD Gpr4;
DWORD Gpr5;
DWORD Gpr6;
DWORD Gpr7;
DWORD Gpr8;
DWORD Gpr9;
DWORD Gpr10;
DWORD Gpr11;
DWORD Gpr12;
DWORD Gpr13;
DWORD Gpr14;
DWORD Gpr15;
DWORD Gpr16;
DWORD Gpr17;
DWORD Gpr18;
DWORD Gpr19;
DWORD Gpr20;
DWORD Gpr21;
DWORD Gpr22;
DWORD Gpr23;
DWORD Gpr24;
DWORD Gpr25;
DWORD Gpr26;
DWORD Gpr27;
DWORD Gpr28;
DWORD Gpr29;
DWORD Gpr30;
DWORD Gpr31;
DWORD Cr;
DWORD Xer;
DWORD Msr;
DWORD Iar;
DWORD Lr;
DWORD Ctr;
DWORD ContextFlags;
DWORD Fill[3];
DWORD Dr0;
DWORD Dr1;
DWORD Dr2;
DWORD Dr3;
DWORD Dr4;
DWORD Dr5;
DWORD Dr6;
DWORD Dr7;
} CONTEXT;

Put the winnt.h content here please.

[tfl - 25-July-08] winnt.h is part of the Windows SDK. It'll probably be faster to download the SDK.

This page MUST describe the context on different platforms! Do not just point to winnt.h!!!