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/*++
Copyright (c) 1992 Microsoft Corporation
Module Name:
data.c
Abstract:
This module contains the x86 specific data for the dpmi library.
Common data is found in dpmi32.c
Author:
Dave Hastings (daveh) creation-date 09-Feb-1994
Revision History:
Neil Sandlin (neilsa) 31-Jul-1995 Updates for the 486 emulator
--*/
#include "precomp.h"
#pragma hdrstop
//
// Pointers to the low memory buffers
//
PUCHAR SmallXlatBuffer;
PUCHAR LargeXlatBuffer;
BOOL SmallBufferInUse;
USHORT LargeBufferInUseCount = 0;
//
// Segment of realmode dosx stack
//
USHORT DosxStackSegment;
//
// segment of realmode dosx code
//
USHORT DosxRmCodeSegment;
//
// selector of realmode code
//
USHORT DosxRmCodeSelector;
//
// Address of pointer to next frame on Dosx stack
//
PWORD16 DosxStackFramePointer;
//
// selector for Dosx DGROUP
//
USHORT DosxPmDataSelector;
//
// Segment to Selector routine (maybe should be 32 bit?)
// NOTE: This is a 16:16 pointer in a ULONG, not a flat address
//
// Entry:
// ds = Dosx DGROUP
// ss = Dosx stack
// AX = Paragraph to convert
// BX = Access rights for new selector
//
// Exit:
// Carry set for error
// AX = New selector
ULONG DosxSegmentToSelector;
//
// Size of dosx stack frame
//
USHORT DosxStackFrameSize;
//
// Dpmi flags for the current application
//
USHORT CurrentAppFlags;
//
// Address of Bop fe for ending interrupt simulation
//
ULONG RmBopFe;
//
// Address of buffer for DTA in Dosx
//
PUCHAR DosxDtaBuffer;
//
// Information about the current DTA
//
// N.B. The selector:offset, and CurrentDta following MAY point to
// different linear addresses. This will be the case if the
// dta selector is in high memory.
// CurrentDosDta holds the "cached" value of the Dta that has
// actually been issued to DOS.
PUCHAR CurrentDta;
PUCHAR CurrentPmDtaAddress;
PUCHAR CurrentDosDta;
USHORT CurrentDtaSelector;
USHORT CurrentDtaOffset;
//
// Selector limits
//
#if DBG
ULONG SelectorLimit[LDT_SIZE];
PULONG ExpSelectorLimit = SelectorLimit;
#else
PULONG ExpSelectorLimit = NULL;
#endif
//
// Start of intel address space in process memory
//
ULONG IntelBase;
//
// Variables used for supporting stack switching
// (on x86, these are in the vdmtib)
//
#ifndef i386
USHORT LockedPMStackSel;
ULONG LockedPMStackCount;
ULONG PMLockOrigEIP;
ULONG PMLockOrigSS;
ULONG PMLockOrigESP;
ULONG DosxFaultHandlerIret;
ULONG DosxFaultHandlerIretd;
ULONG DosxIntHandlerIret;
ULONG DosxIntHandlerIretd;
#endif
ULONG DosxIret;
ULONG DosxIretd;
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