181 lines
3.1 KiB
C
181 lines
3.1 KiB
C
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/*++
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Copyright (c) 1992 Microsoft Corporation
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Module Name:
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data.c
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Abstract:
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This module contains the x86 specific data for the dpmi library.
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Common data is found in dpmi32.c
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Author:
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Dave Hastings (daveh) creation-date 09-Feb-1994
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Revision History:
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Neil Sandlin (neilsa) 31-Jul-1995 Updates for the 486 emulator
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--*/
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#include "precomp.h"
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#pragma hdrstop
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//
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// Information about the current PSP
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//
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USHORT CurrentPSPSelector;
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//
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// Table of selector bases and limits
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//
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ULONG FlatAddress[LDT_SIZE];
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//
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// LDT information
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//
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PLDT_ENTRY Ldt;
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USHORT LdtSel;
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USHORT LdtMaxSel = 0;
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USHORT LdtUserSel = 0;
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//
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// Address of 16 bit Idt
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//
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PIDT_ENTRY Idt;
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//
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// Pointers to the low memory buffers
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//
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PUCHAR SmallXlatBuffer;
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PUCHAR LargeXlatBuffer;
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BOOL SmallBufferInUse;
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USHORT LargeBufferInUseCount = 0;
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//
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// Segment of realmode dosx stack
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//
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USHORT DosxStackSegment;
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//
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// segment of realmode dosx code
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//
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USHORT DosxRmCodeSegment;
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//
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// selector of realmode code
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//
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USHORT DosxRmCodeSelector;
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//
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// Address of pointer to next frame on Dosx stack
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//
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PWORD16 DosxStackFramePointer;
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//
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// Size of dosx stack frame
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//
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USHORT DosxStackFrameSize;
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//
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// Dpmi flags for the current application
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//
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USHORT CurrentAppFlags;
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//
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// Address of Bop fe for ending interrupt simulation
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//
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ULONG RmBopFe;
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ULONG PmBopFe;
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//
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// Address of buffer for DTA in Dosx
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//
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PUCHAR DosxDtaBuffer;
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//
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// Information about the current DTA
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//
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// N.B. The selector:offset, and CurrentDta following MAY point to
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// different linear addresses. This will be the case if the
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// dta selector is in high memory.
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// CurrentDosDta holds the "cached" value of the Dta that has
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// actually been issued to DOS.
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PUCHAR CurrentDta;
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PUCHAR CurrentPmDtaAddress;
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PUCHAR CurrentDosDta;
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USHORT CurrentDtaSelector;
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USHORT CurrentDtaOffset;
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//
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// These are the functions in WOW (GlobalDOSAlloc, GlobalDOSFree)
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// that are used as helper functions to perform DPMI func's 100,101
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// when we are running under WOW.
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//
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USHORT WOWAllocSeg = 0;
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USHORT WOWAllocFunc;
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USHORT WOWFreeSeg = 0;
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USHORT WOWFreeFunc;
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//
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// Selector limits
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//
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#if DBG
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ULONG SelectorLimit[LDT_SIZE];
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PULONG ExpSelectorLimit = SelectorLimit;
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#else
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PULONG ExpSelectorLimit = NULL;
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#endif
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//
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// Start of intel address space in process memory
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//
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ULONG IntelBase = 0;
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//
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// Variables used for supporting stack switching
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// (on x86, these are in the vdmtib)
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//
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#ifndef i386
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USHORT LockedPMStackSel;
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ULONG LockedPMStackCount;
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ULONG PMLockOrigEIP;
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ULONG PMLockOrigSS;
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ULONG PMLockOrigESP;
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ULONG DosxFaultHandlerIret;
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ULONG DosxFaultHandlerIretd;
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ULONG DosxIntHandlerIret;
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ULONG DosxIntHandlerIretd;
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ULONG DosxRMReflector;
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#endif
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VDM_INTERRUPTHANDLER DpmiInterruptHandlers[256] = {0};
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VDM_FAULTHANDLER DpmiFaultHandlers[32] = {0};
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ULONG DosxIret;
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ULONG DosxIretd;
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USHORT PMReflectorSeg;
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ULONG DosxRmSaveRestoreState;
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ULONG DosxPmSaveRestoreState;
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ULONG DosxRmRawModeSwitch;
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ULONG DosxPmRawModeSwitch;
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ULONG DosxVcdPmSvcCall;
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ULONG DosxMsDosApi;
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ULONG DosxXmsControl;
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ULONG DosxHungAppExit;
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//
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// WORKITEM: should be in VDMTIB
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//
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ULONG LastLockedPMStackSS;
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ULONG LastLockedPMStackESP;
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