KeFloatPointState.c File Reference

#include <kmt_test.h>

Include dependency graph for KeFloatPointState.c:

Go to the source code of this file.

Functions
	START_TEST (KeFloatPointState)

Function Documentation

START_TEST()

START_TEST

(

KeFloatPointState

)

Definition at line 10 of file KeFloatPointState.c.

{
    NTSTATUS Status;
    KFLOATING_SAVE FloatSave;
    KIRQL Irql;
 
    /* Save the state under normal conditions */
    Status = KeSaveFloatingPointState(&FloatSave);
    ok_irql(PASSIVE_LEVEL);
    ok_eq_hex(Status, STATUS_SUCCESS);
 
    /* Restore the FPU state back */
    KeRestoreFloatingPointState(&FloatSave);
 
    /* Try to raise the IRQL to APC and do some operations again */
    KeRaiseIrql(APC_LEVEL, &Irql);
 
    /* Save the state under APC_LEVEL interrupt */
    Status = KeSaveFloatingPointState(&FloatSave);
    ok_irql(APC_LEVEL);
    ok_eq_hex(Status, STATUS_SUCCESS);
 
    /* Restore the FPU state back */
    KeRestoreFloatingPointState(&FloatSave);
 
    /* Try to raise the IRQL to dispatch this time */
    KeLowerIrql(Irql);
    KeRaiseIrql(DISPATCH_LEVEL, &Irql);
 
    /* Save the state under DISPATCH_LEVEL interrupt */
    Status = KeSaveFloatingPointState(&FloatSave);
    ok_irql(DISPATCH_LEVEL);
    ok_eq_hex(Status, STATUS_SUCCESS);
 
    /* We're done */
    KeRestoreFloatingPointState(&FloatSave);
    KeLowerIrql(Irql);
}