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https://github.com/reactos/reactos.git
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[NTVDM]
Implement basic VDD support: implement the (un)register & dispatch call BOP (called BOP_3RDPARTY): see "Undocumented DOS" by Schulman et al. page 267 (as always ;) ), as well as: http://www.ragestorm.net/tutorial?id=27 - "Tutorial - Calling Win32 from DOS" http://www.airborn.com.au/layout/vddtest.html - "DOS to 32 bit DLL under XP - an example" (almost the same explanations as the previous article) http://sta.c64.org/blog/dosvddaccess.html - "Accessing Windows device drivers from DOS programs" and... ... your lovely Win2k / Win2k3 DDK section: "Device Technologies/Other Devices/Devices Requiring VDDs" !! Ready to test? :D svn path=/branches/ntvdm/; revision=61283
This commit is contained in:
Hermès Bélusca-Maïto
parent
49b672d829
commit
ed874b41fc
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@ -16,6 +16,7 @@ list(APPEND SOURCE
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registers.c
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speaker.c
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timer.c
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vddsup.c
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vga.c
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ntvdm.c
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ntvdm.rc
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@ -13,6 +13,7 @@
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#include "emulator.h"
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#include "bios.h"
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#include "bop.h"
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#include "vddsup.h"
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#include "io.h"
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#include "registers.h"
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#include "vga.h"
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@ -122,6 +123,9 @@ BOOLEAN EmulatorInitialize(VOID)
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/* Enable interrupts */
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setIF(1);
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/* Initialize VDD support */
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VDDSupInitialize();
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/* Register the DebugBreak BOP */
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RegisterBop(BOP_DEBUGGER, EmulatorDebugBreak);
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236
subsystems/ntvdm/vddsup.c
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236
subsystems/ntvdm/vddsup.c
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@ -0,0 +1,236 @@
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/*
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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: vddsup.c
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* PURPOSE: Virtual DOS Drivers (VDD) Support
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* PROGRAMMERS: Hermes Belusca-Maito (hermes.belusca@sfr.fr)
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*/
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/* INCLUDES *******************************************************************/
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#define NDEBUG
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#include "emulator.h"
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#include "vddsup.h"
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#include "bop.h"
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#include "registers.h"
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typedef VOID (CDECL *VDD_INIT_PROC)(VOID);
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typedef VOID (CDECL *VDD_DISPATCH_PROC)(VOID);
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typedef struct _VDD_MODULE
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{
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HMODULE hDll;
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VDD_DISPATCH_PROC DispatchRoutine;
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} VDD_MODULE, *PVDD_MODULE;
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/* BOP Identifiers */
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#define BOP_3RDPARTY 0x58 // 3rd-party VDD BOP
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/* PRIVATE VARIABLES **********************************************************/
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#define MAX_VDD_MODULES 0xFF
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VDD_MODULE VDDList[MAX_VDD_MODULES] = {{NULL}}; // TODO: Maybe use a linked list.
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// But the number of elements must be <= MAXUSHORT
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/* PRIVATE FUNCTIONS **********************************************************/
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USHORT GetNextFreeVDDEntry(VOID)
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{
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USHORT Entry = MAX_VDD_MODULES;
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for (Entry = 0; Entry < sizeof(VDDList)/sizeof(VDDList[0]); ++Entry)
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{
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if (VDDList[Entry].hDll == NULL) break;
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}
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return Entry;
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}
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VOID WINAPI ThirdPartyVDDBop(LPWORD Stack)
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{
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/* Get the Function Number and skip it */
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BYTE FuncNum = *(PBYTE)SEG_OFF_TO_PTR(getCS(), getIP());
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setIP(getIP() + 1);
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switch (FuncNum)
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{
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/* RegisterModule */
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case 0:
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{
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BOOL Success = TRUE;
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WORD RetVal = 0;
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WORD Entry = 0;
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LPCSTR DllName = NULL,
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InitRoutineName = NULL,
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DispatchRoutineName = NULL;
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HMODULE hDll = NULL;
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VDD_INIT_PROC InitRoutine = NULL;
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VDD_DISPATCH_PROC DispatchRoutine = NULL;
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DPRINT1("RegisterModule() called\n");
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/* Clear the Carry Flag (no error happened so far) */
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setCF(0);
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/* Retrieve the VDD name in DS:SI */
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DllName = SEG_OFF_TO_PTR(getDS(), getSI());
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/* Retrieve the initialization routine API name in ES:DI (optional --> ES=DI=0) */
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if (getES() != 0 || getDI() != 0)
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InitRoutineName = SEG_OFF_TO_PTR(getES(), getDI());
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/* Retrieve the dispatch routine API name in DS:BX */
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DispatchRoutineName = SEG_OFF_TO_PTR(getDS(), getBX());
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DPRINT1("DllName = '%s' - InitRoutineName = '%s' - DispatchRoutineName = '%s'\n",
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(DllName ? DllName : "n/a"),
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(InitRoutineName ? InitRoutineName : "n/a"),
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(DispatchRoutineName ? DispatchRoutineName : "n/a"));
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/* Load the VDD DLL */
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hDll = LoadLibraryA(DllName);
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if (hDll == NULL)
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{
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DWORD LastError = GetLastError();
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Success = FALSE;
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if (LastError == ERROR_NOT_ENOUGH_MEMORY)
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{
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DPRINT1("Not enough memory to load DLL '%s'\n", DllName);
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RetVal = 4;
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goto Quit;
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}
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else
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{
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DPRINT1("Failed to load DLL '%s'; last error = %d\n", DllName, LastError);
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RetVal = 1;
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goto Quit;
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}
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}
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/* Load the initialization routine if needed */
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if (InitRoutineName)
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{
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InitRoutine = (VDD_INIT_PROC)GetProcAddress(hDll, InitRoutineName);
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if (InitRoutine == NULL)
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{
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DPRINT1("Failed to load the initialization routine '%s'\n", InitRoutineName);
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Success = FALSE;
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RetVal = 3;
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goto Quit;
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}
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}
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/* Load the dispatch routine */
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DispatchRoutine = (VDD_DISPATCH_PROC)GetProcAddress(hDll, DispatchRoutineName);
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if (DispatchRoutine == NULL)
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{
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DPRINT1("Failed to load the dispatch routine '%s'\n", DispatchRoutineName);
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Success = FALSE;
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RetVal = 2;
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goto Quit;
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}
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/* If we arrived there, that means everything is OK */
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/* Register the VDD DLL */
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Entry = GetNextFreeVDDEntry();
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if (Entry == MAX_VDD_MODULES)
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{
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DPRINT1("Failed to create a new VDD module entry\n");
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Success = FALSE;
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RetVal = 4;
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goto Quit;
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}
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VDDList[Entry].hDll = hDll;
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VDDList[Entry].DispatchRoutine = DispatchRoutine;
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/* Call the initialization routine if needed */
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if (InitRoutine) InitRoutine();
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/* We succeeded */
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Success = TRUE;
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RetVal = Entry;
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Quit:
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if (!Success)
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{
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/* Unload the VDD DLL */
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if (hDll) FreeLibrary(hDll);
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/* Set the Carry Flag to indicate that an error happened */
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setCF(1);
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}
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// else
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// {
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// /* Clear the Carry Flag (success) */
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// setCF(0);
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// }
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setAX(RetVal);
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break;
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}
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/* UnRegisterModule */
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case 1:
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{
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WORD Entry = getAX();
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DPRINT1("UnRegisterModule() called\n");
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/* Sanity checks */
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if (Entry > MAX_VDD_MODULES || VDDList[Entry].hDll == NULL)
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{
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DPRINT1("Invalid VDD DLL Handle: %d\n", Entry);
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/* Stop the VDM */
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VdmRunning = FALSE;
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return;
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}
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/* Unregister the VDD DLL */
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FreeLibrary(VDDList[Entry].hDll);
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VDDList[Entry].hDll = NULL;
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VDDList[Entry].DispatchRoutine = NULL;
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break;
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}
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/* DispatchCall */
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case 2:
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{
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WORD Entry = getAX();
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DPRINT1("DispatchCall() called\n");
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/* Sanity checks */
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if (Entry > MAX_VDD_MODULES ||
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VDDList[Entry].hDll == NULL ||
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VDDList[Entry].DispatchRoutine == NULL)
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{
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DPRINT1("Invalid VDD DLL Handle: %d\n", Entry);
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/* Stop the VDM */
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VdmRunning = FALSE;
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return;
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}
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/* Call the dispatch routine */
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VDDList[Entry].DispatchRoutine();
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break;
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}
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default:
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{
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DPRINT1("Unknown 3rd-party VDD BOP Function: 0x%02X\n", FuncNum);
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setCF(1);
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break;
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}
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}
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}
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/* PUBLIC FUNCTIONS ***********************************************************/
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VOID VDDSupInitialize(VOID)
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{
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/* Register the 3rd-party VDD BOP Handler */
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RegisterBop(BOP_3RDPARTY, ThirdPartyVDDBop);
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}
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/* EOF */
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20
subsystems/ntvdm/vddsup.h
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20
subsystems/ntvdm/vddsup.h
Normal file
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@ -0,0 +1,20 @@
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/*
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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: vddsup.h
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* PURPOSE: Virtual DOS Drivers (VDD) Support
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* PROGRAMMERS: Hermes Belusca-Maito (hermes.belusca@sfr.fr)
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*/
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#ifndef _VDDSUP_H_
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#define _VDDSUP_H_
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/* DEFINES ********************************************************************/
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/* FUNCTIONS ******************************************************************/
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VOID VDDSupInitialize(VOID);
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#endif // _VDDSUP_H_
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/* EOF */
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