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
	_IRQL_requires_ (APC_LEVEL)

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 13 of file psctx.c.

Function Documentation

_IRQL_requires_()

_IRQL_requires_

(

APC_LEVEL

)

Definition at line 19 of file psctx.c.

{
    PGET_SET_CTX_CONTEXT GetSetContext;
    PKTHREAD Thread;
    PKTRAP_FRAME TrapFrame = NULL;
 
    PAGED_CODE();
 
    /* Get the Context Structure */
    GetSetContext = CONTAINING_RECORD(Apc, GET_SET_CTX_CONTEXT, Apc);
    Thread = Apc->SystemArgument2;
    NT_ASSERT(KeGetCurrentThread() == Thread);
 
    /* If this is a kernel-mode request, grab the saved trap frame */
    if (GetSetContext->Mode == KernelMode)
    {
        TrapFrame = Thread->TrapFrame;
    }
 
    /* If we don't have one, grab it from the stack */
    if (TrapFrame == NULL)
    {
        /* Get the thread's base trap frame */
        TrapFrame = KeGetTrapFrame(KeGetCurrentThread());
    }
 
    /* Check if it's a set or get */
    if (Apc->SystemArgument1 != 0)
    {
        /* Set the nonvolatiles on the stack, target frame is the trap frame */
        KiSetTrapContext(TrapFrame, &GetSetContext->Context, GetSetContext->Mode);
    }
    else
    {
        /* Convert the trap frame to a context */
        KeTrapFrameToContext(TrapFrame,
                             NULL,
                             &GetSetContext->Context);
    }
 
    /* Notify the Native API that we are done */
    KeSetEvent(&GetSetContext->Event, IO_NO_INCREMENT, FALSE);
}