psctx.c File Reference

#include <ntoskrnl.h>
#include <debug.h>

Include dependency graph for psctx.c:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
VOID NTAPI	PspGetContext (IN PKTRAP_FRAME TrapFrame, IN PVOID NonVolatileContext, IN OUT PCONTEXT Context)
VOID NTAPI	PspSetContext (OUT PKTRAP_FRAME TrapFrame, OUT PVOID NonVolatileContext, IN PCONTEXT Context, IN KPROCESSOR_MODE Mode)
VOID NTAPI	PspGetOrSetContextKernelRoutine (IN PKAPC Apc, IN OUT PKNORMAL_ROUTINE *NormalRoutine, IN OUT PVOID *NormalContext, IN OUT PVOID *SystemArgument1, IN OUT PVOID *SystemArgument2)

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 12 of file psctx.c.

Function Documentation

PspGetContext()

VOID NTAPI PspGetContext	(	IN PKTRAP_FRAME	TrapFrame,
		IN PVOID	NonVolatileContext,
		IN OUT PCONTEXT	Context
	)

Definition at line 19 of file psctx.c.

{
    PAGED_CODE();
 
    /* Convert the trap frame to a context */
    KeTrapFrameToContext(TrapFrame, NULL, Context);
}

PspGetOrSetContextKernelRoutine()

VOID NTAPI PspGetOrSetContextKernelRoutine	(	IN PKAPC	Apc,
		IN OUT PKNORMAL_ROUTINE *	NormalRoutine,
		IN OUT PVOID *	NormalContext,
		IN OUT PVOID *	SystemArgument1,
		IN OUT PVOID *	SystemArgument2
	)

Definition at line 44 of file psctx.c.

{
    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);
}

Referenced by PsGetContextThread(), and PsSetContextThread().

PspSetContext()

VOID NTAPI PspSetContext	(	OUT PKTRAP_FRAME	TrapFrame,
		OUT PVOID	NonVolatileContext,
		IN PCONTEXT	Context,
		IN KPROCESSOR_MODE	Mode
	)

Definition at line 31 of file psctx.c.

{
    PAGED_CODE();
 
    /* Convert the context to a trap frame structure */
    KeContextToTrapFrame(Context, NULL, TrapFrame, Context->ContextFlags, Mode);
}