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339 lines
10 KiB
C
339 lines
10 KiB
C
/*
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* COPYRIGHT: GPL - See COPYING in the top level directory
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* PROJECT: ReactOS Virtual DOS Machine
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* FILE: subsystems/mvdm/ntvdm/dos/dos32krnl/dos.h
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* PURPOSE: DOS32 Kernel
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* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
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*/
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#ifndef _DOS_H_
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#define _DOS_H_
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/* INCLUDES *******************************************************************/
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#include "device.h"
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/**/ #include "int32.h" /**/
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/* DEFINES ********************************************************************/
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//
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// We are DOS 5.00 (reported by INT 21h, AH=30h)
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// and DOS 5.50 (reported by INT 21h, AX=3306h) for Windows NT Compatibility
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//
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#define DOS_VERSION MAKEWORD(5, 00)
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#define NTDOS_VERSION MAKEWORD(5, 50)
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#define DOS_CONFIG_PATH L"%SystemRoot%\\system32\\CONFIG.NT"
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#define DOS_COMMAND_INTERPRETER L"%SystemRoot%\\system32\\COMMAND.COM /k %SystemRoot%\\system32\\AUTOEXEC.NT"
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#define BIOS_CODE_SEGMENT 0x70
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#define BIOS_DATA_SEGMENT 0x70
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#define DOS_CODE_SEGMENT 0x80
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#define DOS_DATA_SEGMENT 0xA5
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#define DOS_DATA_OFFSET(x) FIELD_OFFSET(DOS_DATA, x)
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#define SYSTEM_ENV_BLOCK 0x600 // FIXME: Should be dynamically initialized!
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#define SYSTEM_PSP 0x0008
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#define INVALID_DOS_HANDLE 0xFFFF
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#define DOS_INPUT_HANDLE 0
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#define DOS_OUTPUT_HANDLE 1
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#define DOS_ERROR_HANDLE 2
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#define DOS_SFT_SIZE 255 // Value of the 'FILES=' command; maximum 255
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#define DOS_DIR_LENGTH 64
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#define NUM_DRIVES ('Z' - 'A' + 1)
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#define DOS_CHAR_ATTRIBUTE 0x07
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#pragma pack(push, 1)
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typedef struct _DOS_FCB
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{
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BYTE DriveNumber;
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CHAR FileName[8];
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CHAR FileExt[3];
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WORD BlockNumber;
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WORD RecordSize;
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DWORD FileSize;
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WORD LastWriteDate;
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WORD LastWriteTime;
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BYTE Reserved[8];
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BYTE BlockRecord;
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BYTE RecordNumber[3];
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} DOS_FCB, *PDOS_FCB;
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// http://www.ctyme.com/intr/rb-2983.htm
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typedef struct _DOS_SYSVARS
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{
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DWORD OemHandler;
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WORD Int21hReturn;
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WORD ShareRetryCount;
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WORD ShareRetryDelay;
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DWORD DiskBuffer;
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WORD UnreadConInput;
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WORD FirstMcb;
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/* This is where the SYSVARS really start */
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DWORD FirstDpb; // 0x00
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DWORD FirstSft; // 0x04
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DWORD ActiveClock; // 0x08
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DWORD ActiveCon; // 0x0c
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BYTE Reserved0[6]; // 0x10
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DWORD CurrentDirs; // 0x16
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BYTE Reserved1[6]; // 0x1a
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BYTE NumBlockDevices; // 0x20
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BYTE NumLocalDrives; // 0x21 - Set by LASTDRIVE
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DOS_DRIVER NullDevice; // 0x22
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BYTE Reserved2; // 0x34
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WORD ProgramVersionTable; // 0x35
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DWORD SetVerTable; // 0x37
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WORD Reserved3[2]; // 0x3b
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WORD BuffersNumber; // 0x3f - 'x' parameter in "BUFFERS=x,y" command
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WORD BuffersLookaheadNumber; // 0x41 - 'y' parameter in "BUFFERS=x,y" command
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BYTE BootDrive; // 0x43
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BYTE UseDwordMoves; // 0x44
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WORD ExtMemSize; // 0x45
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BYTE Reserved4[0x1C]; // 0x47
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BYTE UmbLinked; // 0x63 - 0/1: UMB chain (un)linked to MCB chain
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WORD Reserved5; // 0x64
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WORD UmbChainStart; // 0x66 - Segment of the first UMB MCB
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WORD MemAllocScanStart; // 0x68 - Segment where allocation scan starts
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} DOS_SYSVARS, *PDOS_SYSVARS;
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typedef struct _DOS_CLOCK_TRANSFER_RECORD
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{
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WORD NumberOfDays;
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BYTE Minutes;
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BYTE Hours;
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BYTE Hundredths;
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BYTE Seconds;
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} DOS_CLOCK_TRANSFER_RECORD, *PDOS_CLOCK_TRANSFER_RECORD;
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typedef struct _DOS_INPUT_BUFFER
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{
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BYTE MaxLength;
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BYTE Length;
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CHAR Buffer[ANYSIZE_ARRAY];
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} DOS_INPUT_BUFFER, *PDOS_INPUT_BUFFER;
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typedef struct _DOS_FIND_FILE_BLOCK
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{
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CHAR DriveLetter;
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CHAR Pattern[11];
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UCHAR AttribMask;
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DWORD Unused;
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HANDLE SearchHandle;
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/* The following part of the structure is documented */
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UCHAR Attributes;
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WORD FileTime;
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WORD FileDate;
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DWORD FileSize;
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CHAR FileName[13];
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} DOS_FIND_FILE_BLOCK, *PDOS_FIND_FILE_BLOCK;
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// http://www.ctyme.com/intr/rb-3023.htm
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typedef struct _DOS_SDA
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{
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BYTE PrinterEchoFlag;
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CHAR CurrentSwitchChar;
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BYTE AllocStrategy;
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BYTE Unused0[28];
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/* This is where the SDA really starts */
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BYTE ErrorMode;
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BYTE InDos;
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BYTE ErrorDrive;
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BYTE LastErrorLocus;
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WORD LastErrorCode;
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BYTE LastErrorAction;
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BYTE LastErrorClass;
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DWORD LastErrorPointer;
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DWORD DiskTransferArea;
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WORD CurrentPsp;
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WORD Int23StackPointer;
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WORD ErrorLevel;
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BYTE CurrentDrive;
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BYTE ExtendedBreakFlag;
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/* This part is only valid while in DOS */
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WORD LastAX;
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WORD NetworkPsp;
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WORD NetworkMachineNumber;
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WORD FirstFreeMcb;
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WORD BestFreeMcb;
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WORD LastFreeMcb;
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WORD MemorySize;
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WORD LastSearchDirEntry;
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BYTE Int24FailFlag;
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BYTE DirectoryFlag;
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BYTE CtrlBreakFlag;
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BYTE AllowFcbBlanks;
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BYTE Unused1;
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BYTE DayOfMonth;
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BYTE Month;
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WORD Year;
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WORD NumDays;
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BYTE DayOfWeek;
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BYTE ConsoleSwappedFlag;
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BYTE Int28CallOk;
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BYTE Int24AbortFlag;
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DOS_RW_REQUEST Request;
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DWORD DriverEntryPoint;
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BYTE Unused2[44];
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BYTE PspCopyType;
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BYTE Unused3;
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BYTE UserNumber[3];
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BYTE OemNumber;
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WORD ErrorCodeTable;
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DOS_CLOCK_TRANSFER_RECORD ClockTransferRecord;
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BYTE ByteBuffer;
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BYTE Unused4;
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CHAR FileNameBuffer[256];
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BYTE Unused5[53];
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CHAR CurrentDirectory[81];
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CHAR FcbFilename[12];
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CHAR FcbRenameDest[12];
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BYTE Unused6[8];
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BYTE ExtendedAttribute;
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BYTE FcbType;
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BYTE DirSearchAttributes;
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BYTE FileOpenMode;
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BYTE FileFound;
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BYTE DeviceNameFound;
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BYTE SpliceFlag;
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BYTE DosCallFlag;
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BYTE Unused7[5];
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BYTE InsertMode;
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BYTE ParsedFcbExists;
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BYTE VolumeIDFlag;
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BYTE TerminationType;
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BYTE CreateFileFlag;
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BYTE FileDeletedChar;
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DWORD CriticalErrorDpb;
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DWORD UserRegistersStack;
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WORD Int24StackPointer;
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BYTE Unused8[14];
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DWORD DeviceHeader;
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DWORD CurrentSft;
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DWORD CurrentDirPointer;
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DWORD CallerFcb;
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WORD SftNumber;
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WORD TempFileHandle;
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DWORD JftEntry;
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WORD FirstArgument;
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WORD SecondArgument;
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WORD LastComponent;
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WORD TransferOffset;
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BYTE Unused9[38];
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DWORD WorkingSft;
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WORD Int21CallerBX;
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WORD Int21CallerDS;
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WORD Unused10;
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DWORD PrevCallFrame;
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} DOS_SDA, *PDOS_SDA;
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/*
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* DOS kernel data structure
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*/
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typedef struct _DOS_DATA
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{
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DOS_SYSVARS SysVars;
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BYTE NullDriverRoutine[7];
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WORD DosVersion; // DOS version to report to programs (can be different from the true one)
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DOS_SDA Sda;
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CHAR CurrentDirectories[NUM_DRIVES][DOS_DIR_LENGTH];
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BYTE UnreadConInputBuffer[128];
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BYTE DosStack[384];
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BYTE Sft[ANYSIZE_ARRAY];
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} DOS_DATA, *PDOS_DATA;
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/*
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* DOS BIOS data structure at segment 70h
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*/
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typedef struct _BIOS_DATA
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{
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BYTE StartupCode[20]; // 0x00 - 20 bytes: large enough for now!
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/*
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* INT 13h (BIOS Disk Services) handler chain support.
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*
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* RomBiosInt13: The original INT 13h vector (normally from ROM BIOS).
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* PrevInt13 : The previous INT 13h vector in the handler chain (initially
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* initialized with the RomBiosInt13 value; each time some
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* program calls INT 2Fh, AH=13h, PrevInt13 is updated).
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*
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* DOS hooks INT 13h with its own code, then (in normal circumstances) calls
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* PrevInt13, so that when a program calls INT 13h, the DOS hook is first called,
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* followed by the previous INT 13h (be it the original or some other hooked one).
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* DOS may call PrevInt13 directly in some internal operations too.
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* RomBiosInt13 is intended to be the original INT 13h vector that existed
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* before DOS was loaded. A particular version of PC-AT's IBM's ROM BIOS
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* (on systems with model byte FCh and BIOS date "01/10/84" only, see
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* http://www.ctyme.com/intr/rb-4453.htm for more details) had a bug on disk
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* reads so that it was patched by DOS, and therefore PrevInt13 was the fixed
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* INT 13 interrupt (for the other cases, a direct call to RomBiosInt13 is done).
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*
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* NOTE: For compatibility with some programs (including virii), PrevInt13 should
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* be at 0070:00B4, see for more details:
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* http://repo.hackerzvoice.net/depot_madchat/vxdevl/vdat/tuvd0001.htm
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* http://vxheaven.org/lib/vsm01.html
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*/
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BYTE Padding0[0xB0 - /*FIELD_OFFSET(BIOS_DATA, StartupCode)*/ 20];
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DWORD RomBiosInt13; // 0xb0
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DWORD PrevInt13; // 0xb4
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BYTE Padding1[0x100 - 0xB8]; // 0xb8
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} BIOS_DATA, *PBIOS_DATA;
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C_ASSERT(sizeof(BIOS_DATA) == 0x100);
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#pragma pack(pop)
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/* VARIABLES ******************************************************************/
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extern PBIOS_DATA BiosData;
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extern PDOS_DATA DosData;
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extern PDOS_SYSVARS SysVars;
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extern PDOS_SDA Sda;
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/* FUNCTIONS ******************************************************************/
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extern CALLBACK16 DosContext;
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#define RegisterDosInt32(IntNumber, IntHandler) \
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do { \
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ASSERT((0x20 <= IntNumber) && (IntNumber <= 0x2F)); \
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RegisterInt32(DosContext.TrampolineFarPtr + \
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DosContext.TrampolineSize + \
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(IntNumber - 0x20) * Int16To32StubSize, \
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(IntNumber), (IntHandler), NULL); \
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} while(0);
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VOID ConDrvInitialize(VOID);
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VOID ConDrvCleanup(VOID);
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/*
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* DOS BIOS Functions
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* See bios.c
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*/
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CHAR DosReadCharacter(WORD FileHandle, BOOLEAN Echo);
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BOOLEAN DosCheckInput(VOID);
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VOID DosPrintCharacter(WORD FileHandle, CHAR Character);
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BOOLEAN DosBIOSInitialize(VOID);
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BOOLEAN DosControlBreak(VOID);
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VOID DosEchoCharacter(CHAR Character);
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/*
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* DOS Kernel Functions
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* See dos.c
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*/
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BOOLEAN DosKRNLInitialize(VOID);
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#endif // _DOS_H_
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/* EOF */
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