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92 lines
2.5 KiB
C
92 lines
2.5 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/i386/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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*/
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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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VOID
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NTAPI
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PspGetContext(IN PKTRAP_FRAME TrapFrame,
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IN PVOID NonVolatileContext,
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IN OUT PCONTEXT Context)
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{
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PAGED_CODE();
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/* Convert the trap frame to a context */
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KeTrapFrameToContext(TrapFrame, NULL, Context);
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}
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VOID
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NTAPI
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PspSetContext(OUT PKTRAP_FRAME TrapFrame,
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OUT PVOID NonVolatileContext,
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IN PCONTEXT Context,
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IN KPROCESSOR_MODE Mode)
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{
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PAGED_CODE();
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/* Convert the context to a trap frame structure */
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KeContextToTrapFrame(Context, NULL, TrapFrame, Context->ContextFlags, Mode);
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}
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VOID
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NTAPI
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PspGetOrSetContextKernelRoutine(IN PKAPC Apc,
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IN OUT PKNORMAL_ROUTINE* NormalRoutine,
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IN OUT PVOID* NormalContext,
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IN OUT PVOID* SystemArgument1,
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IN OUT PVOID* SystemArgument2)
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{
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PGET_SET_CTX_CONTEXT GetSetContext;
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PKEVENT Event;
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PCONTEXT Context;
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PETHREAD Thread;
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KPROCESSOR_MODE Mode;
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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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Context = &GetSetContext->Context;
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Event = &GetSetContext->Event;
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Mode = GetSetContext->Mode;
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Thread = Apc->SystemArgument2;
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/* If this is a kernel-mode request, grab the saved trap frame */
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if (Mode == KernelMode) TrapFrame = Thread->Tcb.TrapFrame;
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/* If we don't have one, grab it from the stack */
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if (!TrapFrame)
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{
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/* Trap frame is right under our initial stack */
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TrapFrame = KeGetTrapFrame(&Thread->Tcb);
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}
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/* Check if it's a set or get */
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if (Apc->SystemArgument1)
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{
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/* Set the Context */
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PspSetContext(TrapFrame, NULL, Context, Mode);
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}
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else
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{
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/* Get the Context */
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PspGetContext(TrapFrame, NULL, Context);
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}
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/* Notify the Native API that we are done */
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KeSetEvent(Event, IO_NO_INCREMENT, FALSE);
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}
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/* EOF */
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