mirror of
https://github.com/reactos/reactos.git
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521 lines
12 KiB
C
521 lines
12 KiB
C
/*
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* PROJECT: ReactOS Virtual DOS Machine
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* LICENSE: GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
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* PURPOSE: Testing VDD for NTVDM
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* COPYRIGHT: Copyright 2015-2018 Hermes Belusca-Maito
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*/
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/* INCLUDES *******************************************************************/
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#include <stdio.h>
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#include <windows.h>
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#include <vddsvc.h>
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#define NDEBUG
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#include <debug.h>
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/* DEBUGGING HELPERS **********************************************************/
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// Enable this define to use DPRINT1 instead of MessageBox
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// #define DBG_SILENT
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#ifdef DBG_SILENT
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#define VDD_DBG(...) \
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do { \
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DPRINT1(__VA_ARGS__); \
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DbgPrint("\n"); \
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} while(0)
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#else
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static VOID
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VddDbgMsg(LPCSTR Format, ...)
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{
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#ifndef WIN2K_COMPLIANT
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CHAR StaticBuffer[256];
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LPSTR Buffer = StaticBuffer; // Use the static buffer by default.
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#else
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CHAR Buffer[2048]; // Large enough. If not, increase it by hand.
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#endif
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size_t MsgLen;
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va_list Parameters;
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va_start(Parameters, Format);
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#ifndef WIN2K_COMPLIANT
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/*
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* Retrieve the message length and if it is too long, allocate
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* an auxiliary buffer; otherwise use the static buffer.
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*/
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MsgLen = _vscprintf(Format, Parameters) + 1; // NULL-terminated
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if (MsgLen > ARRAYSIZE(StaticBuffer))
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{
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Buffer = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, MsgLen * sizeof(WCHAR));
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if (Buffer == NULL)
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{
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/* Allocation failed, use the static buffer and display a suitable error message */
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Buffer = StaticBuffer;
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Format = "DisplayMessage()\nOriginal message is too long and allocating an auxiliary buffer failed.";
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MsgLen = strlen(Format);
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}
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}
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#else
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MsgLen = ARRAYSIZE(Buffer);
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#endif
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/* Display the message */
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_vsnprintf(Buffer, MsgLen, Format, Parameters);
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MessageBoxA(NULL, Buffer, "Test VDD", MB_OK);
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#ifndef WIN2K_COMPLIANT
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/* Free the buffer if needed */
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if (Buffer != StaticBuffer) HeapFree(GetProcessHeap(), 0, Buffer);
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#endif
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va_end(Parameters);
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}
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#define VDD_DBG VddDbgMsg
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#endif
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/* GLOBALS ********************************************************************/
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HANDLE hVdd = NULL;
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/* VDD I/O PORTS TESTING ******************************************************/
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/*
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* Port hooks (serial ports) -- Each port range is for testing different port handlers.
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*/
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#define NUM_PORTS 4
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VDD_IO_PORTRANGE PortDefs[NUM_PORTS] =
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{
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{0x3F8, 0x3FF},
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{0x2F8, 0x2FF},
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{0x3E8, 0x3EF},
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{0x2E8, 0x2EF}
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};
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VOID
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WINAPI
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PortInB(IN USHORT Port,
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OUT PUCHAR Data)
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{
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*Data = 0;
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VDD_DBG("0x%08x (BYTE 0x%02x) <-- Port 0x%04x", Data, *Data, Port);
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}
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VOID
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WINAPI
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PortOutB(IN USHORT Port,
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IN UCHAR Data)
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{
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VDD_DBG("(BYTE 0x%02x) --> Port 0x%04x", Data, Port);
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}
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VOID
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WINAPI
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PortInW(IN USHORT Port,
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OUT PUSHORT Data)
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{
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*Data = 0;
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VDD_DBG("0x%08x (WORD 0x%04x) <-- Port 0x%04x", Data, *Data, Port);
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}
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VOID
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WINAPI
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PortOutW(IN USHORT Port,
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IN USHORT Data)
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{
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VDD_DBG("(WORD 0x%04x) --> Port 0x%04x", Data, Port);
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}
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VOID
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WINAPI
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PortInsB(IN USHORT Port,
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OUT PUCHAR Data,
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IN USHORT Count)
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{
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VDD_DBG("0x%08x (BYTESTR[%u]) <-- Port 0x%04x", Data, Count, Port);
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while (Count--) *Data++ = 0;
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}
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VOID
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WINAPI
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PortOutsB(IN USHORT Port,
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IN PUCHAR Data,
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IN USHORT Count)
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{
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VDD_DBG("0x%08x (BYTESTR[%u]) --> Port 0x%04x", Data, Count, Port);
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}
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VOID
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WINAPI
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PortInsW(IN USHORT Port,
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OUT PUSHORT Data,
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IN USHORT Count)
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{
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VDD_DBG("0x%08x (WORDSTR[%u]) <-- Port 0x%04x", Data, Count, Port);
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while (Count--) *Data++ = 0;
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}
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VOID
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WINAPI
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PortOutsW(IN USHORT Port,
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IN PUSHORT Data,
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IN USHORT Count)
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{
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VDD_DBG("0x%08x (WORDSTR[%u]) --> Port 0x%04x", Data, Count, Port);
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}
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VDD_IO_HANDLERS PortHandlers[NUM_PORTS] =
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{
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{PortInB, NULL , NULL , NULL , PortOutB, NULL , NULL , NULL },
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{PortInB, PortInW, NULL , NULL , PortOutB, PortOutW, NULL , NULL },
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{PortInB, NULL , PortInsB, NULL , PortOutB, NULL , PortOutsB, NULL },
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{PortInB, NULL , NULL , PortInsW, PortOutB, NULL , NULL , PortOutsW},
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};
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/* VDD MEMORY HOOKS TESTING ***************************************************/
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/*
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* Everything should be page-rounded.
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*/
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#ifndef PAGE_SIZE
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#define PAGE_SIZE 0x1000
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#endif
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#ifndef PAGE_ROUND_DOWN
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#define PAGE_ROUND_DOWN(x) \
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( ((ULONG_PTR)(x)) & (~(PAGE_SIZE-1)) )
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#endif
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#ifndef PAGE_ROUND_UP
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#define PAGE_ROUND_UP(x) \
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( (((ULONG_PTR)(x)) + PAGE_SIZE-1) & (~(PAGE_SIZE-1)) )
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#endif
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#define MEM_SEG_START 0x0000
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#define MEM_SIZE PAGE_SIZE
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USHORT HookedSegment = 0x0000;
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ULONG HookedOffset = 0x0000;
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PVOID HookedAddress = NULL;
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VOID
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WINAPI
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MemoryHandler(IN PVOID FaultAddress,
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IN ULONG RWMode)
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{
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BOOLEAN Success = FALSE;
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VDD_DBG("MemoryHandler(0x%08x, %s)", FaultAddress, (RWMode == 1) ? "Write" : "Read");
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// VDDTerminateVDM();
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Success = VDDAllocMem(hVdd, HookedAddress, MEM_SIZE);
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if (!Success) VDD_DBG("Unable to allocate memory");
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}
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PVOID
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FindHookableMemory(IN USHORT StartSegment,
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IN ULONG StartOffset,
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OUT PUSHORT HookedSegment,
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OUT PULONG HookedOffset)
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{
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BOOLEAN Success;
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PVOID PhysMemStart = NULL;
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USHORT Segment = StartSegment;
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ULONG Offset = PAGE_ROUND_DOWN(StartOffset);
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*HookedSegment = 0x0000;
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*HookedOffset = 0x0000;
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while (Segment <= 0xF000)
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{
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// PhysMemStart = GetVDMPointer(GetVDMAddress(Segment, Offset), MEM_SIZE, (getMSW() & MSW_PE));
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PhysMemStart = VdmMapFlat(Segment, Offset, getMODE());
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/* Try to hook this memory area... */
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Success = VDDInstallMemoryHook(hVdd, PhysMemStart, MEM_SIZE, MemoryHandler);
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if (!Success)
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{
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/* ... it didn't work. Free PhysMemStart, increase segment/offset and try again. */
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DPRINT1("%04lX:%08lX hooking failed, continue...\n", Segment, Offset);
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VdmUnmapFlat(Segment, Offset, PhysMemStart, getMODE());
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// FreeVDMPointer(GetVDMAddress(Segment, Offset), MEM_SIZE, PhysMemStart, (getMSW() & MSW_PE));
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PhysMemStart = NULL;
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Offset += MEM_SIZE;
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if (Offset + MEM_SIZE > 0xFFFF)
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{
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Segment += 0x1000;
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Offset = 0x0000;
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}
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}
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else
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{
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/* ... it worked. We'll free PhysMemStart later on. */
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DPRINT1("%04lX:%08lX hooking succeeded!\n", Segment, Offset);
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break;
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}
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}
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if (PhysMemStart)
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{
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VDD_DBG("We hooked at %04lX:%08lX (0x%p)", Segment, Offset, PhysMemStart);
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*HookedSegment = Segment;
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*HookedOffset = Offset;
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}
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else
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{
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VDD_DBG("Hooking attempt failed!");
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}
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return PhysMemStart;
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}
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/* VDD USER HOOKS TESTING *****************************************************/
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VOID
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WINAPI
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Create1Handler(USHORT DosPDB)
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{
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VDD_DBG("Create1Handler(0x%04x)", DosPDB);
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}
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VOID
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WINAPI
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Create2Handler(USHORT DosPDB)
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{
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VDD_DBG("Create2Handler(0x%04x)", DosPDB);
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}
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VOID
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WINAPI
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Terminate1Handler(USHORT DosPDB)
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{
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VDD_DBG("Terminate1Handler(0x%04x)", DosPDB);
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}
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VOID
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WINAPI
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Terminate2Handler(USHORT DosPDB)
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{
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VDD_DBG("Terminate2Handler(0x%04x)", DosPDB);
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}
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VOID
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WINAPI
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Block1Handler(VOID)
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{
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VDD_DBG("Block1Handler");
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}
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VOID
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WINAPI
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Block2Handler(VOID)
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{
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VDD_DBG("Block2Handler");
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}
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VOID
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WINAPI
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Resume1Handler(VOID)
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{
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VDD_DBG("Resume1Handler");
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}
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VOID
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WINAPI
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Resume2Handler(VOID)
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{
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VDD_DBG("Resume2Handler");
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}
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/* VDD INITIALIZATION AND REGISTRATION ****************************************/
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VOID
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WINAPI
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TestVDDRegister(VOID)
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{
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VDD_DBG("TestVDDRegister");
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/* Clear the Carry Flag: success */
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setCF(0);
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}
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VOID
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WINAPI
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TestVDDUnRegister(VOID)
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{
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VDD_DBG("TestVDDUnRegister");
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/* Clear the Carry Flag: success */
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setCF(0);
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}
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VOID
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WINAPI
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TestVDDDispatch(VOID)
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{
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VDD_DBG("TestVDDDispatch");
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/* Clear the Carry Flag: success */
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setCF(0);
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}
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BOOLEAN
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RegisterVDD(BOOLEAN Register)
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{
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BOOLEAN Success = FALSE;
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if (Register)
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{
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/* Hook some IO ports */
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VDD_DBG("VDDInstallIOHook");
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Success = VDDInstallIOHook(hVdd, NUM_PORTS, PortDefs, PortHandlers);
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if (!Success)
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{
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VDD_DBG("Unable to hook IO ports, terminate...");
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VDDTerminateVDM();
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}
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/* Add a memory handler */
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VDD_DBG("FindHookableMemory");
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HookedAddress = FindHookableMemory(MEM_SEG_START, 0x0000,
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&HookedSegment, &HookedOffset);
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if (HookedAddress == NULL)
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{
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VDD_DBG("Unable to install memory handler, terminate...");
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VDDTerminateVDM();
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}
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/* Add some user hooks -- Test order of initialization and calling */
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VDD_DBG("VDDInstallUserHook (1)");
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Success = VDDInstallUserHook(hVdd,
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Create1Handler,
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Terminate1Handler,
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Block1Handler,
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Resume1Handler);
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if (!Success)
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{
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VDD_DBG("Unable to install user hooks (1)...");
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}
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VDD_DBG("VDDInstallUserHook (2)");
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Success = VDDInstallUserHook(hVdd,
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Create2Handler,
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Terminate2Handler,
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Block2Handler,
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Resume2Handler);
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if (!Success)
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{
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VDD_DBG("Unable to install user hooks (2)...");
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}
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/* We have finished! */
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VDD_DBG("Initialization finished!");
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}
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else
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{
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/* Remove the user hooks */
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VDD_DBG("VDDDeInstallUserHook (1)");
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Success = VDDDeInstallUserHook(hVdd);
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if (!Success) VDD_DBG("Unable to uninstall user hooks (1)");
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// TODO: See which hooks are still existing there...
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VDD_DBG("VDDDeInstallUserHook (2)");
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Success = VDDDeInstallUserHook(hVdd);
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if (!Success) VDD_DBG("Unable to uninstall user hooks (2)");
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VDD_DBG("VDDDeInstallUserHook (3)");
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Success = VDDDeInstallUserHook(hVdd);
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if (!Success) VDD_DBG("EXPECTED ERROR: Unable to uninstall user hooks (3)");
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else VDD_DBG("UNEXPECTED ERROR: Uninstalling user hooks (3) succeeded?!");
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/* Uninstall the memory handler */
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Success = VDDFreeMem(hVdd, HookedAddress, MEM_SIZE);
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if (!Success) VDD_DBG("Unable to free memory");
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VDD_DBG("VDDDeInstallMemoryHook");
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Success = VDDDeInstallMemoryHook(hVdd, HookedAddress, MEM_SIZE);
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if (!Success) VDD_DBG("Memory handler uninstall failed");
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VDD_DBG("VdmUnmapFlat");
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Success = VdmUnmapFlat(HookedSegment, HookedOffset, HookedAddress, getMODE());
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// FreeVDMPointer(GetVDMAddress(HookedSegment, HookedOffset), MEM_SIZE, HookedAddress, (getMSW() & MSW_PE));
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if (!Success) VDD_DBG("VdmUnmapFlat failed!");
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/* Deregister the hooked IO ports */
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VDD_DBG("VDDDeInstallIOHook");
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VDDDeInstallIOHook(hVdd, NUM_PORTS, PortDefs);
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VDD_DBG("Cleanup finished!");
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Success = TRUE;
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}
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return Success;
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}
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BOOL
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WINAPI // VDDInitialize
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DllMain(IN HINSTANCE hInstanceDll,
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IN DWORD dwReason,
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IN LPVOID lpReserved)
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{
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BOOLEAN Success;
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UNREFERENCED_PARAMETER(lpReserved);
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switch (dwReason)
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{
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case DLL_PROCESS_ATTACH:
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{
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VDD_DBG("DLL_PROCESS_ATTACH");
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/* Save our global VDD handle */
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hVdd = hInstanceDll;
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/* Register VDD */
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Success = RegisterVDD(TRUE);
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if (!Success) VDD_DBG("Failed to register the VDD...");
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break;
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}
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case DLL_PROCESS_DETACH:
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{
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VDD_DBG("DLL_PROCESS_DETACH");
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/* Unregister VDD */
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Success = RegisterVDD(FALSE);
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if (!Success) VDD_DBG("Failed to unregister the VDD...");
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break;
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}
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case DLL_THREAD_ATTACH:
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case DLL_THREAD_DETACH:
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default:
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break;
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}
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return TRUE;
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}
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/* EOF */
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