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72 lines
2 KiB
C
72 lines
2 KiB
C
/*
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* PROJECT: ReactOS Kernel
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: ntoskrnl/ps/amd64/psctx.c
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* PURPOSE: Process Manager: Set/Get Context for i386
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* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
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* Timo Kreuzer (timo.kreuzer@reactos.org)
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*/
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/* INCLUDES *******************************************************************/
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#include <ntoskrnl.h>
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#define NDEBUG
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#include <debug.h>
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/* FUNCTIONS ******************************************************************/
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_IRQL_requires_(APC_LEVEL)
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VOID
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NTAPI
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PspGetOrSetContextKernelRoutine(
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_In_ PKAPC Apc,
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_Inout_ PKNORMAL_ROUTINE* NormalRoutine,
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_Inout_ PVOID* NormalContext,
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_Inout_ PVOID* SystemArgument1,
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_Inout_ PVOID* SystemArgument2)
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{
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PGET_SET_CTX_CONTEXT GetSetContext;
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PKTHREAD Thread;
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PKTRAP_FRAME TrapFrame = NULL;
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PAGED_CODE();
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/* Get the Context Structure */
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GetSetContext = CONTAINING_RECORD(Apc, GET_SET_CTX_CONTEXT, Apc);
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Thread = Apc->SystemArgument2;
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NT_ASSERT(KeGetCurrentThread() == Thread);
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/* If this is a kernel-mode request, grab the saved trap frame */
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if (GetSetContext->Mode == KernelMode)
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{
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TrapFrame = Thread->TrapFrame;
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}
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/* If we don't have one, grab it from the stack */
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if (TrapFrame == NULL)
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{
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/* Get the thread's base trap frame */
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TrapFrame = KeGetTrapFrame(KeGetCurrentThread());
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}
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/* Check if it's a set or get */
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if (Apc->SystemArgument1 != 0)
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{
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/* Set the nonvolatiles on the stack, target frame is the trap frame */
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KiSetTrapContext(TrapFrame, &GetSetContext->Context, GetSetContext->Mode);
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}
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else
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{
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/* Convert the trap frame to a context */
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KeTrapFrameToContext(TrapFrame,
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NULL,
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&GetSetContext->Context);
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}
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/* Notify the Native API that we are done */
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KeSetEvent(&GetSetContext->Event, IO_NO_INCREMENT, FALSE);
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}
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/* EOF */
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