reactos/ntoskrnl/ps/i386/psctx.c
2021-06-11 15:33:08 +03:00

92 lines
2.5 KiB
C

/*
* PROJECT: ReactOS Kernel
* LICENSE: GPL - See COPYING in the top level directory
* FILE: ntoskrnl/ps/i386/psctx.c
* PURPOSE: Process Manager: Set/Get Context for i386
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
*/
/* INCLUDES *******************************************************************/
#include <ntoskrnl.h>
#define NDEBUG
#include <debug.h>
/* FUNCTIONS ******************************************************************/
VOID
NTAPI
PspGetContext(IN PKTRAP_FRAME TrapFrame,
IN PVOID NonVolatileContext,
IN OUT PCONTEXT Context)
{
PAGED_CODE();
/* Convert the trap frame to a context */
KeTrapFrameToContext(TrapFrame, NULL, Context);
}
VOID
NTAPI
PspSetContext(OUT PKTRAP_FRAME TrapFrame,
OUT PVOID NonVolatileContext,
IN PCONTEXT Context,
IN KPROCESSOR_MODE Mode)
{
PAGED_CODE();
/* Convert the context to a trap frame structure */
KeContextToTrapFrame(Context, NULL, TrapFrame, Context->ContextFlags, Mode);
}
VOID
NTAPI
PspGetOrSetContextKernelRoutine(IN PKAPC Apc,
IN OUT PKNORMAL_ROUTINE* NormalRoutine,
IN OUT PVOID* NormalContext,
IN OUT PVOID* SystemArgument1,
IN OUT PVOID* SystemArgument2)
{
PGET_SET_CTX_CONTEXT GetSetContext;
PKEVENT Event;
PCONTEXT Context;
PETHREAD Thread;
KPROCESSOR_MODE Mode;
PKTRAP_FRAME TrapFrame = NULL;
PAGED_CODE();
/* Get the Context Structure */
GetSetContext = CONTAINING_RECORD(Apc, GET_SET_CTX_CONTEXT, Apc);
Context = &GetSetContext->Context;
Event = &GetSetContext->Event;
Mode = GetSetContext->Mode;
Thread = Apc->SystemArgument2;
/* If this is a kernel-mode request, grab the saved trap frame */
if (Mode == KernelMode) TrapFrame = Thread->Tcb.TrapFrame;
/* If we don't have one, grab it from the stack */
if (!TrapFrame)
{
/* Trap frame is right under our initial stack */
TrapFrame = KeGetTrapFrame(&Thread->Tcb);
}
/* Check if it's a set or get */
if (Apc->SystemArgument1)
{
/* Set the Context */
PspSetContext(TrapFrame, NULL, Context, Mode);
}
else
{
/* Get the Context */
PspGetContext(TrapFrame, NULL, Context);
}
/* Notify the Native API that we are done */
KeSetEvent(Event, IO_NO_INCREMENT, FALSE);
}
/* EOF */