vdmentry.c File Reference

#include "vdmp.h"
#include <ntvdmp.h>

Go to the source code of this file.

Defines
#define	AssertIrqlPassive()
Functions
NTSTATUS	NtVdmControl (IN VDMSERVICECLASS Service, IN OUT PVOID ServiceData)

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Define Documentation

#define AssertIrqlPassive (   )

Definition at line 45 of file vdmentry.c. Referenced by NtVdmControl().

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Function Documentation

NTSTATUS NtVdmControl (  IN VDMSERVICECLASS  Service, IN OUT PVOID  ServiceData )

Definition at line 51 of file vdmentry.c. References AssertIrqlPassive, EXCEPTION_EXECUTE_HANDLER, Ke386SetVdmInterruptHandler(), KeGetCurrentThread, KeI386VdmIoplAllowed, KeI386VirtualIntExtensions, NTSTATUS(), PAGED_CODE, ProbeForRead, ProbeForWriteBoolean, Status, USHORT, VdmpDelayInterrupt(), VdmpInitialize(), VdmpPrinterDirectIoClose(), VdmpPrinterDirectIoOpen(), VdmpPrinterInitialize(), VdmpQueueInterrupt(), VdmpStartExecution(), and VdmQueryDirectoryFile(). 00057 : 00058 00059 386 specific routine which dispatches to the appropriate function 00060 based on service number. 00061 00062 Arguments: 00063 00064 Service -- Specifies what service is to be performed 00065 ServiceData -- Supplies a pointer to service specific data 00066 00067 Return Value: 00068 00069 if invalid service number: STATUS_INVALID_PARAMETER_1 00070 else see individual services. 00071 00072 00073 --*/ 00074 { 00075 NTSTATUS Status; 00076 00077 PAGED_CODE(); 00078 00079 // 00080 // Dispatch in descending order of frequency 00081 // 00082 if (Service == VdmStartExecution) { 00083 Status = VdmpStartExecution(); 00084 } else if (Service == VdmQueueInterrupt) { 00085 Status = VdmpQueueInterrupt(ServiceData); 00086 } else if (Service == VdmDelayInterrupt) { 00087 Status = VdmpDelayInterrupt(ServiceData); 00088 } else if (Service == VdmQueryDir) { 00089 Status = VdmQueryDirectoryFile(ServiceData); 00090 } else if (Service == VdmInitialize) { 00091 Status = VdmpInitialize(ServiceData); 00092 } else if (Service == VdmFeatures) { 00093 try { 00094 // 00095 // Verify that we were passed a valid user address 00096 // 00097 ProbeForWriteBoolean((PBOOLEAN)ServiceData); 00098 00099 // 00100 // Return the appropriate feature bits to notify 00101 // ntvdm which modes (if any) fast IF emulation is 00102 // available for 00103 // 00104 if (KeI386VdmIoplAllowed) { 00105 *((PULONG)ServiceData) = V86_VIRTUAL_INT_EXTENSIONS; 00106 } else { 00107 // remove this if pm extensions to be used 00108 *((PULONG)ServiceData) = KeI386VirtualIntExtensions & 00109 ~PM_VIRTUAL_INT_EXTENSIONS; 00110 } 00111 00112 } except(EXCEPTION_EXECUTE_HANDLER) { 00113 Status = GetExceptionCode(); 00114 } 00115 Status = STATUS_SUCCESS; 00116 00117 } else if (Service == VdmSetInt21Handler) { 00118 try { 00119 ProbeForRead(ServiceData, sizeof(VDMSET_INT21_HANDLER_DATA), 1); 00120 00121 Status = Ke386SetVdmInterruptHandler( 00122 KeGetCurrentThread()->ApcState.Process, 00123 0x21L, 00124 (USHORT)(((PVDMSET_INT21_HANDLER_DATA)ServiceData)->Selector), 00125 ((PVDMSET_INT21_HANDLER_DATA)ServiceData)->Offset, 00126 ((PVDMSET_INT21_HANDLER_DATA)ServiceData)->Gate32 00127 ); 00128 } except(EXCEPTION_EXECUTE_HANDLER) { 00129 Status = GetExceptionCode(); 00130 } 00131 00132 } else if (Service == VdmPrinterDirectIoOpen) { 00133 Status = VdmpPrinterDirectIoOpen(ServiceData); 00134 } else if (Service == VdmPrinterDirectIoClose) { 00135 Status = VdmpPrinterDirectIoClose(ServiceData); 00136 } else if (Service == VdmPrinterInitialize) { 00137 Status = VdmpPrinterInitialize(ServiceData); 00138 } else { 00139 Status = STATUS_INVALID_PARAMETER_1; 00140 } 00141 00142 00143 AssertIrqlPassive(); 00144 return Status; 00145 00146 } }

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