📄 winnt.h
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//
// Context Frame
//
// This frame has a several purposes: 1) it is used as an argument to
// NtContinue, 2) it is used to construct a call frame for APC delivery,
// 3) it is used to construct a call frame for exception dispatching
// in user mode, 4) it is used in the user level thread creation
// routines, and 5) it is used to to pass thread state to debuggers.
//
// N.B. Because this record is used as a call frame, it must be EXACTLY
// a multiple of 16 bytes in length.
//
// There are two variations of the context structure. This is the real one.
//
typedef struct _CONTEXT {
//
// This section is specified/returned if the ContextFlags word contains
// the flag CONTEXT_FLOATING_POINT.
//
ULONGLONG FltF0;
ULONGLONG FltF1;
ULONGLONG FltF2;
ULONGLONG FltF3;
ULONGLONG FltF4;
ULONGLONG FltF5;
ULONGLONG FltF6;
ULONGLONG FltF7;
ULONGLONG FltF8;
ULONGLONG FltF9;
ULONGLONG FltF10;
ULONGLONG FltF11;
ULONGLONG FltF12;
ULONGLONG FltF13;
ULONGLONG FltF14;
ULONGLONG FltF15;
ULONGLONG FltF16;
ULONGLONG FltF17;
ULONGLONG FltF18;
ULONGLONG FltF19;
ULONGLONG FltF20;
ULONGLONG FltF21;
ULONGLONG FltF22;
ULONGLONG FltF23;
ULONGLONG FltF24;
ULONGLONG FltF25;
ULONGLONG FltF26;
ULONGLONG FltF27;
ULONGLONG FltF28;
ULONGLONG FltF29;
ULONGLONG FltF30;
ULONGLONG FltF31;
//
// This section is specified/returned if the ContextFlags word contains
// the flag CONTEXT_INTEGER.
//
// N.B. The registers gp, sp, and ra are defined in this section, but are
// considered part of the control context rather than part of the integer
// context.
//
ULONGLONG IntV0; // $0: return value register, v0
ULONGLONG IntT0; // $1: temporary registers, t0 - t7
ULONGLONG IntT1; // $2:
ULONGLONG IntT2; // $3:
ULONGLONG IntT3; // $4:
ULONGLONG IntT4; // $5:
ULONGLONG IntT5; // $6:
ULONGLONG IntT6; // $7:
ULONGLONG IntT7; // $8:
ULONGLONG IntS0; // $9: nonvolatile registers, s0 - s5
ULONGLONG IntS1; // $10:
ULONGLONG IntS2; // $11:
ULONGLONG IntS3; // $12:
ULONGLONG IntS4; // $13:
ULONGLONG IntS5; // $14:
ULONGLONG IntFp; // $15: frame pointer register, fp/s6
ULONGLONG IntA0; // $16: argument registers, a0 - a5
ULONGLONG IntA1; // $17:
ULONGLONG IntA2; // $18:
ULONGLONG IntA3; // $19:
ULONGLONG IntA4; // $20:
ULONGLONG IntA5; // $21:
ULONGLONG IntT8; // $22: temporary registers, t8 - t11
ULONGLONG IntT9; // $23:
ULONGLONG IntT10; // $24:
ULONGLONG IntT11; // $25:
ULONGLONG IntRa; // $26: return address register, ra
ULONGLONG IntT12; // $27: temporary register, t12
ULONGLONG IntAt; // $28: assembler temp register, at
ULONGLONG IntGp; // $29: global pointer register, gp
ULONGLONG IntSp; // $30: stack pointer register, sp
ULONGLONG IntZero; // $31: zero register, zero
//
// This section is specified/returned if the ContextFlags word contains
// the flag CONTEXT_FLOATING_POINT.
//
ULONGLONG Fpcr; // floating point control register
ULONGLONG SoftFpcr; // software extension to FPCR
//
// This section is specified/returned if the ContextFlags word contains
// the flag CONTEXT_CONTROL.
//
// N.B. The registers gp, sp, and ra are defined in the integer section,
// but are considered part of the control context rather than part of
// the integer context.
//
ULONGLONG Fir; // (fault instruction) continuation address
DWORD Psr; // processor status
//
// 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 thread's 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;
DWORD Fill[4]; // padding for 16-byte stack frame alignment
} CONTEXT, *PCONTEXT;
#else
#error _PORTABLE_32BIT_CONTEXT no longer supported on Alpha.
#endif // _PORTABLE_32BIT_CONTEXT
// end_ntddk end_nthal
#endif // _ALPHA_
#ifdef _ALPHA_
VOID
__jump_unwind (
PVOID VirtualFramePointer,
PVOID TargetPc
);
#endif // _ALPHA_
#ifdef _X86_
//
// Disable these two pragmas that evaluate to "sti" "cli" on x86 so that driver
// writers to not leave them inadvertantly in their code.
//
#if !defined(MIDL_PASS)
#if !defined(RC_INVOKED)
#if _MSC_VER >= 1200
#pragma warning(push)
#endif
#pragma warning(disable:4164) // disable C4164 warning so that apps that
// build with /Od don't get weird errors !
#ifdef _M_IX86
#pragma function(_enable)
#pragma function(_disable)
#endif
#if _MSC_VER >= 1200
#pragma warning(pop)
#else
#pragma warning(default:4164) // reenable C4164 warning
#endif
#endif
#endif
#if !defined(MIDL_PASS) && defined(_M_IX86)
#if _MSC_VER >= 1200
#pragma warning(push)
#endif
#pragma warning (disable:4035) // disable 4035 (function must return something)
_inline PVOID GetFiberData( void ) { __asm {
mov eax, fs:[0x10]
mov eax,[eax]
}
}
_inline PVOID GetCurrentFiber( void ) { __asm mov eax, fs:[0x10] }
#if _MSC_VER >= 1200
#pragma warning(pop)
#else
#pragma warning (default:4035) // Reenable it
#endif
#endif
// begin_ntddk begin_wx86
//
// Define the size of the 80387 save area, which is in the context frame.
//
#define SIZE_OF_80387_REGISTERS 80
//
// The following flags control the contents of the CONTEXT structure.
//
#if !defined(RC_INVOKED)
#define CONTEXT_i386 0x00010000 // this assumes that i386 and
#define CONTEXT_i486 0x00010000 // i486 have identical context records
// end_wx86
#define CONTEXT_CONTROL (CONTEXT_i386 | 0x00000001L) // SS:SP, CS:IP, FLAGS, BP
#define CONTEXT_INTEGER (CONTEXT_i386 | 0x00000002L) // AX, BX, CX, DX, SI, DI
#define CONTEXT_SEGMENTS (CONTEXT_i386 | 0x00000004L) // DS, ES, FS, GS
#define CONTEXT_FLOATING_POINT (CONTEXT_i386 | 0x00000008L) // 387 state
#define CONTEXT_DEBUG_REGISTERS (CONTEXT_i386 | 0x00000010L) // DB 0-3,6,7
#define CONTEXT_EXTENDED_REGISTERS (CONTEXT_i386 | 0x00000020L) // cpu specific extensions
#define CONTEXT_FULL (CONTEXT_CONTROL | CONTEXT_INTEGER |\
CONTEXT_SEGMENTS)
// begin_wx86
#endif
#define MAXIMUM_SUPPORTED_EXTENSION 512
typedef struct _FLOATING_SAVE_AREA {
DWORD ControlWord;
DWORD StatusWord;
DWORD TagWord;
DWORD ErrorOffset;
DWORD ErrorSelector;
DWORD DataOffset;
DWORD DataSelector;
BYTE RegisterArea[SIZE_OF_80387_REGISTERS];
DWORD Cr0NpxState;
} FLOATING_SAVE_AREA;
typedef FLOATING_SAVE_AREA *PFLOATING_SAVE_AREA;
//
// Context Frame
//
// This frame has a several purposes: 1) it is used as an argument to
// NtContinue, 2) is is used to constuct a call frame for APC delivery,
// and 3) it is used in the user level thread creation routines.
//
// The layout of the record conforms to a standard call frame.
//
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 CONTEXT *PCONTEXT;
// begin_ntminiport
#endif //_X86_
#ifndef _LDT_ENTRY_DEFINED
#define _LDT_ENTRY_DEFINED
typedef struct _LDT_ENTRY {
WORD LimitLow;
WORD BaseLow;
union {
struct {
BYTE BaseMid;
BYTE Flags1; // Declare as bytes to avoid alignment
BYTE Flags2; // Problems.
BYTE BaseHi;
} Bytes;
struct {
DWORD BaseMid : 8;
DWORD Type : 5;
DWORD Dpl : 2;
DWORD Pres : 1;
DWORD LimitHi : 4;
DWORD Sys : 1;
DWORD Reserved_0 : 1;
DWORD Default_Big : 1;
DWORD Granularity : 1;
DWORD BaseHi : 8;
} Bits;
} HighWord;
} LDT_ENTRY, *PLDT_ENTRY;
#endif
#if defined(_MIPS_)
//
// Define functions to get the address of the current fiber and the
// current fiber data.
//
#define GetCurrentFiber() ((*(PNT_TIB *)0x7ffff4a8)->FiberData)
#define GetFiberData() (*(PVOID *)(GetCurrentFiber()))
// begin_ntddk begin_nthal
//
// The following flags control the contents of the CONTEXT structure.
//
#if !defined(RC_INVOKED)
#define CONTEXT_R4000 0x00010000 // r4000 context
#define CONTEXT_CONTROL (CONTEXT_R4000 | 0x00000001)
#define CONTEXT_FLOATING_POINT (CONTEXT_R4000 | 0x00000002)
#define CONTEXT_INTEGER (CONTEXT_R4000 | 0x00000004)
#define CONTEXT_EXTENDED_FLOAT (CONTEXT_FLOATING_POINT | 0x00000008)
#define CONTEXT_EXTENDED_INTEGER (CONTEXT_INTEGER | 0x00000010)
#define CONTEXT_FULL (CONTEXT_CONTROL | CONTEXT_FLOATING_POINT | \
CONTEXT_INTEGER | CONTEXT_EXTENDED_INTEGER)
#endif
//
// Context Frame
//
// N.B. This frame must be exactly a multiple of 16 bytes in length.
//
// This frame has a several purposes: 1) it is used as an argument to
// NtContinue, 2) it is used to constuct a call frame for APC delivery,
// 3) it is used to construct a call frame for exception dispatching
// in user mode, and 4) it is used in the user level thread creation
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