NTSTATUS
NTAPI
INIT_FUNCTION
PspLookupKernelUserEntryPoints(VOID)
{
NTSTATUS Status;
/* Get user-mode APC trampoline */
Status = PspLookupSystemDllEntryPoint("KiUserApcDispatcher",
&KeUserApcDispatcher);
if (!NT_SUCCESS(Status)) return Status;
/* Get user-mode exception dispatcher */
Status = PspLookupSystemDllEntryPoint("KiUserExceptionDispatcher",
&KeUserExceptionDispatcher);
if (!NT_SUCCESS(Status)) return Status;
/* Get user-mode callback dispatcher */
Status = PspLookupSystemDllEntryPoint("KiUserCallbackDispatcher",
&KeUserCallbackDispatcher);
if (!NT_SUCCESS(Status)) return Status;
/* Get user-mode exception raise trampoline */
Status = PspLookupSystemDllEntryPoint("KiRaiseUserExceptionDispatcher",
&KeRaiseUserExceptionDispatcher);
if (!NT_SUCCESS(Status)) return Status;
/* Get user-mode SLIST exception functions for page fault rollback race hack */
Status = PspLookupSystemDllEntryPoint("ExpInterlockedPopEntrySListEnd",
&KeUserPopEntrySListEnd);
if (!NT_SUCCESS(Status)) { DPRINT1("this not found\n"); return Status; }
Status = PspLookupSystemDllEntryPoint("ExpInterlockedPopEntrySListFault",
&KeUserPopEntrySListFault);
if (!NT_SUCCESS(Status)) { DPRINT1("this not found\n"); return Status; }
Status = PspLookupSystemDllEntryPoint("ExpInterlockedPopEntrySListResume",
&KeUserPopEntrySListResume);
if (!NT_SUCCESS(Status)) { DPRINT1("this not found\n"); return Status; }
/* On x86, there are multiple ways to do a system call, find the right stubs */
#if defined(_X86_)
/* Check if this is a machine that supports SYSENTER */
if (KeFeatureBits & KF_FAST_SYSCALL)
{
/* Get user-mode sysenter stub */
SharedUserData->SystemCall = (PsNtosImageBase >> (PAGE_SHIFT + 1));
Status = PspLookupSystemDllEntryPoint("KiFastSystemCall",
(PVOID)&SharedUserData->
SystemCall);
if (!NT_SUCCESS(Status)) return Status;
/* Get user-mode sysenter return stub */
Status = PspLookupSystemDllEntryPoint("KiFastSystemCallRet",
(PVOID)&SharedUserData->
SystemCallReturn);
if (!NT_SUCCESS(Status)) return Status;
}
NTSTATUS
PspLookupKernelUserEntryPoints (
VOID
)
/*++
Routine Description:
The function locates the address of the exception dispatch and user APC
delivery routine in the system DLL and stores the respective addresses
in the PCR.
Arguments:
None.
Return Value:
NTSTATUS
--*/
{
NTSTATUS Status;
PSZ EntryName;
//
// Lookup the user mode "trampoline" code for exception dispatching
//
EntryName = "KiUserExceptionDispatcher";
Status = PspLookupSystemDllEntryPoint(EntryName,
(PVOID *)&KeUserExceptionDispatcher);
if (NT_SUCCESS(Status) == FALSE) {
KdPrint(("Ps: Cannot find user exception dispatcher address\n"));
return Status;
}
//
// Lookup the user mode "trampoline" code for APC dispatching
//
EntryName = "KiUserApcDispatcher";
Status = PspLookupSystemDllEntryPoint(EntryName,
(PVOID *)&KeUserApcDispatcher);
if (NT_SUCCESS(Status) == FALSE) {
KdPrint(("Ps: Cannot find user apc dispatcher address\n"));
return Status;
}
//
// Lookup the user mode "trampoline" code for callback dispatching.
//
EntryName = "KiUserCallbackDispatcher";
Status = PspLookupSystemDllEntryPoint(EntryName,
(PVOID *)&KeUserCallbackDispatcher);
if (NT_SUCCESS(Status) == FALSE) {
KdPrint(("Ps: Cannot find user callback dispatcher address\n"));
return Status;
}
//
// Lookup the user mode "trampoline" code for raising a usermode exception
//
EntryName = "KiRaiseUserExceptionDispatcher";
Status = PspLookupSystemDllEntryPoint(EntryName,
(PVOID *)&KeRaiseUserExceptionDispatcher);
if (NT_SUCCESS(Status) == FALSE) {
KdPrint(("Ps: Cannot find raise user exception dispatcher address\n"));
return Status;
}
return Status;
}