Source code of Windows XP (NT5)
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/*++ BUILD Version: 0002 Increment this if a change has global effects
Module Name:
wx86nt.h
Abstract:
defines Nt i386 specific data structures (from nti386)
Revision History:
--*/
#ifndef _WX86NT_
#define _WX86NT_
// Size of Global Descriptor Table
#define GDT_SIZE 4096 // big enough...
#define IDT_SIZE (8*256)
//
// Rename some of the platform dependent datatypes,
// so that we can access the i386 form on risc.
//
#ifndef _X86_
#define _X86_
#endif
#ifndef _FLOATING_SAVE_AREA
#define _FLOATING_SAVE_AREA _FLOATING_SAVE_AREA_WX86
#define FLOATING_SAVE_AREA FLOATING_SAVE_AREA_WX86
#define PFLOATING_SAVE_AREA PFLOATING_SAVE_AREA_WX86
#endif
#define _CONTEXT _CONTEXT_WX86
#define CONTEXT CONTEXT_WX86
#define PCONTEXT PCONTEXT_WX86
#define FXSAVE_FORMAT FXSAVE_FORMAT_WX86
#define PFXSAVE_FORMAT PFXSAVE_FORMAT_WX86
#ifdef _X86_
//
// Disable these two pramas 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
//
// 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
#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_
//
// Define the size of FP registers in the FXSAVE format
//
#define SIZE_OF_FX_REGISTERS 128
//
// Format of data for fxsave/fxrstor instruction
//
#include "pshpack1.h"
#ifndef WOW64EXTS_386
#ifndef _NTDBG_
typedef struct _FXSAVE_FORMAT { USHORT ControlWord; USHORT StatusWord; USHORT TagWord; USHORT ErrorOpcode; ULONG ErrorOffset; ULONG ErrorSelector; ULONG DataOffset; ULONG DataSelector; ULONG MXCsr; ULONG Reserved2; UCHAR RegisterArea[SIZE_OF_FX_REGISTERS]; UCHAR Reserved3[SIZE_OF_FX_REGISTERS]; UCHAR Reserved4[224]; UCHAR Align16Byte[8];} FXSAVE_FORMAT, *PFXSAVE_FORMAT;#endif
#endif
#include "poppack.h"
#define KGDT_R0_DATA 16
#define KGDT_R3_CODE 24
#define KGDT_R3_DATA 32
#define KGDT_TSS 40
#define KGDT_R0_PCR 48
#define KGDT_R3_TEB 56
#define KGDT_VDM_TILE 64
#define KGDT_LDT 72
#define KGDT_DF_TSS 80
#define KGDT_NMI_TSS 88
//
// Stop the renaming so that the risc datatypes
// are accessible by their normal names
//
#undef _FLOATING_SAVE_AREA
#undef FLOATING_SAVE_AREA
#undef PFLOATING_SAVE_AREA
#undef _CONTEXT
#undef CONTEXT
#undef PCONTEXT
#undef FXSAVE_FORMAT
#undef PFXSAVE_FORMAT
//
// set up the i386 CONTEXT bits for the ContextFlags
// warning: this MUST match nti386.h
//
#define CONTEXT_CONTROL_WX86 (CONTEXT_i386 | 0x00000001L) // SS:SP, CS:IP, FLAGS, BP
#define CONTEXT_INTEGER_WX86 (CONTEXT_i386 | 0x00000002L) // AX, BX, CX, DX, SI, DI
#define CONTEXT_SEGMENTS_WX86 (CONTEXT_i386 | 0x00000004L) // DS, ES, FS, GS
#define CONTEXT_FLOATING_POINT_WX86 (CONTEXT_i386 | 0x00000008L) // 387 state
#define CONTEXT_DEBUG_REGISTERS_WX86 (CONTEXT_i386 | 0x00000010L) // DB 0-3,6,7
#define CONTEXT_EXTENDED_REGISTERS_WX86 (CONTEXT_i386 | 0x00000020L) // cpu specific extensions
#define CONTEXT_FULL_WX86 (CONTEXT_CONTROL_WX86 | CONTEXT_INTEGER_WX86 | CONTEXT_SEGMENTS_WX86)
#undef _X86_
#endif /* _WX86NT_ */
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