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https://github.com/reactos/reactos.git
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36f251eca0
Fix several bugs: The file was not entirely read due to an integer overflow. The second WORD of the Program Segment Prefix (PSP) is not the number of allocated paragraphs, but the segment of the last paragraph. Fix the order of registers (SI and DI were mixed up with SP and BP). Implement interrupt 0x11. Implement redirection for reading/writing characters. svn path=/branches/ntvdm/; revision=59409
115 lines
3.2 KiB
C
115 lines
3.2 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: dos.h
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* PURPOSE: VDM DOS Kernel (header file)
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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 "ntvdm.h"
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/* DEFINES ********************************************************************/
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#define DOS_VERSION MAKEWORD(6, 0)
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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 FIRST_MCB_SEGMENT 0x1000
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#define USER_MEMORY_SIZE 0x8FFF
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#define SYSTEM_PSP 0x08
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#define SYSTEM_ENV_BLOCK 0x800
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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
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#define SEGMENT_TO_MCB(seg) ((PDOS_MCB)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), 0)))
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#define SEGMENT_TO_PSP(seg) ((PDOS_PSP)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), 0)))
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#pragma pack(push, 1)
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typedef struct _DOS_MCB
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{
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CHAR BlockType;
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WORD OwnerPsp;
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WORD Size;
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BYTE Unused[3];
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CHAR Name[8];
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} DOS_MCB, *PDOS_MCB;
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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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typedef struct _DOS_PSP
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{
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BYTE Exit[2];
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WORD LastParagraph;
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BYTE Reserved0[6];
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DWORD TerminateAddress;
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DWORD BreakAddress;
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DWORD CriticalAddress;
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WORD ParentPsp;
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BYTE HandleTable[20];
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WORD EnvBlock;
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DWORD LastStack;
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WORD HandleTableSize;
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DWORD HandleTablePtr;
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DWORD PreviousPsp;
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DWORD Reserved1;
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WORD DosVersion;
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BYTE Reserved2[14];
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BYTE FarCall[3];
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BYTE Reserved3[9];
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DOS_FCB Fcb;
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BYTE CommandLineSize;
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CHAR CommandLine[127];
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} DOS_PSP, *PDOS_PSP;
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typedef struct _DOS_INPUT_BUFFER
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{
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BYTE MaxLength, Length;
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CHAR Buffer[ANYSIZE_ARRAY];
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} DOS_INPUT_BUFFER, *PDOS_INPUT_BUFFER;
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#pragma pack(pop)
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/* FUNCTIONS ******************************************************************/
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WORD DosAllocateMemory(WORD Size, WORD *MaxAvailable);
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BOOLEAN DosResizeMemory(WORD BlockData, WORD NewSize, WORD *MaxAvailable);
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BOOLEAN DosFreeMemory(WORD BlockData);
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WORD DosCreateFile(LPWORD Handle, LPCSTR FilePath, WORD Attributes);
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WORD DosOpenFile(LPWORD Handle, LPCSTR FilePath, BYTE AccessMode);
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WORD DosReadFile(WORD FileHandle, LPVOID Buffer, WORD Count, LPWORD BytesRead);
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WORD DosWriteFile(WORD FileHandle, LPVOID Buffer, WORD Count, LPWORD BytesWritten);
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VOID DosInitializePsp(WORD PspSegment, LPCSTR CommandLine, WORD ProgramSize, WORD Environment);
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BOOLEAN DosCreateProcess(LPCSTR CommandLine, WORD EnvBlock);
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VOID DosTerminateProcess(WORD Psp, BYTE ReturnCode);
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CHAR DosReadCharacter();
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VOID DosPrintCharacter(CHAR Character);
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VOID DosInt20h(WORD CodeSegment);
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VOID DosInt21h(WORD CodeSegment);
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VOID DosBreakInterrupt();
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BOOLEAN DosInitialize();
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#endif
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/* EOF */
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