3 * COPYRIGHT: See COPYING in the top level directory
4 * PROJECT: ReactOS kernel
5 * FILE: ntoskrnl/hal/x86/usercall.c
6 * PURPOSE: 2E interrupt handler
7 * PROGRAMMER: David Welch (david.welch@seh.ox.ac.uk)
12 /* INCLUDES ******************************************************************/
14 #define NTOS_MODE_KERNEL
16 #include <internal/ntoskrnl.h>
17 #include <internal/ke.h>
18 #include <internal/ps.h>
19 #include <internal/i386/segment.h>
20 #include <internal/i386/mm.h>
23 #include <internal/debug.h>
25 #include <internal/ps.h>
27 /* FUNCTIONS *****************************************************************/
29 VOID KiSystemCallHook(ULONG Nr, ...)
37 DbgPrint("%x/%d ", KeServiceDescriptorTable[0].SSDT[Nr].SysCallPtr, Nr);
38 DbgPrint("%x (", KeServiceDescriptorTable[0].SSPT[Nr].ParamBytes);
39 for (i = 0; i < KeServiceDescriptorTable[0].SSPT[Nr].ParamBytes / 4; i++)
41 DbgPrint("%x, ", va_arg(ap, ULONG));
44 assert_irql(PASSIVE_LEVEL);
49 ULONG KiAfterSystemCallHook(ULONG NtStatus, PKTRAP_FRAME TrapFrame)
51 if (KeGetCurrentThread()->Alerted[1] != 0 && TrapFrame->Cs != KERNEL_CS)
55 if (KeGetCurrentThread()->Alerted[0] != 0 && TrapFrame->Cs != KERNEL_CS)
57 KiDeliverUserApc(TrapFrame);
63 VOID KiServiceCheck (ULONG Nr)
67 Thread = PsGetCurrentThread();
70 DbgPrint ("KiServiceCheck(%p) called\n", Thread);
71 DbgPrint ("Service %d (%p)\n", Nr, KeServiceDescriptorTableShadow[1].SSDT[Nr].SysCallPtr);
74 if (Thread->Tcb.ServiceTable != KeServiceDescriptorTableShadow)
77 DbgPrint ("Initialize Win32 thread\n");
80 PsInitWin32Thread (Thread);
82 Thread->Tcb.ServiceTable = KeServiceDescriptorTableShadow;
86 // This function should be used by win32k.sys to add its own user32/gdi32 services
87 // TableIndex is 0 based
88 // ServiceCountTable its not used at the moment
93 KeAddSystemServiceTable (
95 PULONG ServiceCounterTable,
96 ULONG NumberOfServices,
101 if (TableIndex > SSDT_MAX_ENTRIES - 1)
104 /* check if descriptor table entry is free */
105 if ((KeServiceDescriptorTable[TableIndex].SSDT != NULL) ||
106 (KeServiceDescriptorTableShadow[TableIndex].SSDT != NULL))
109 /* initialize the shadow service descriptor table */
110 KeServiceDescriptorTableShadow[TableIndex].SSDT = SSDT;
111 KeServiceDescriptorTableShadow[TableIndex].SSPT = SSPT;
112 KeServiceDescriptorTableShadow[TableIndex].NumberOfServices = NumberOfServices;
113 KeServiceDescriptorTableShadow[TableIndex].ServiceCounterTable = ServiceCounterTable;
115 /* initialize the service descriptor table (not for win32k services) */
118 KeServiceDescriptorTable[TableIndex].SSDT = SSDT;
119 KeServiceDescriptorTable[TableIndex].SSPT = SSPT;
120 KeServiceDescriptorTable[TableIndex].NumberOfServices = NumberOfServices;
121 KeServiceDescriptorTable[TableIndex].ServiceCounterTable = ServiceCounterTable;