freeze.c File Reference

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

Include dependency graph for freeze.c:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
BOOLEAN NTAPI	KeFreezeExecution (IN PKTRAP_FRAME TrapFrame, IN PKEXCEPTION_FRAME ExceptionFrame)
VOID NTAPI	KeThawExecution (IN BOOLEAN Enable)

Variables
KIRQL	KiOldIrql
ULONG	KiFreezeFlag

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 13 of file freeze.c.

Function Documentation

KeFreezeExecution()

BOOLEAN NTAPI KeFreezeExecution	(	IN PKTRAP_FRAME	TrapFrame,
		IN PKEXCEPTION_FRAME	ExceptionFrame
	)

Definition at line 26 of file freeze.c.

{
    BOOLEAN Enable;
    KIRQL OldIrql;
 
#ifndef CONFIG_SMP
    UNREFERENCED_PARAMETER(TrapFrame);
    UNREFERENCED_PARAMETER(ExceptionFrame);
#endif
 
    /* Disable interrupts, get previous state and set the freeze flag */
    Enable = KeDisableInterrupts();
    KiFreezeFlag = 4;
 
#ifndef CONFIG_SMP
    /* Raise IRQL if we have to */
    OldIrql = KeGetCurrentIrql();
    if (OldIrql < DISPATCH_LEVEL)
        OldIrql = KeRaiseIrqlToDpcLevel();
#else
    /* Raise IRQL to HIGH_LEVEL */
    KeRaiseIrql(HIGH_LEVEL, &OldIrql);
#endif
 
#ifdef CONFIG_SMP
    /* Architecture specific freeze code */
    KxFreezeExecution();
#endif
 
    /* Save the old IRQL to be restored on unfreeze */
    KiOldIrql = OldIrql;
 
    /* Return whether interrupts were enabled */
    return Enable;
}

Referenced by KdEnterDebugger().

KeThawExecution()

VOID NTAPI KeThawExecution

(

IN BOOLEAN

Enable

)

Definition at line 65 of file freeze.c.

{
#ifdef CONFIG_SMP
    /* Architecture specific thaw code */
    KxThawExecution();
#endif
 
    /* Clear the freeze flag */
    KiFreezeFlag = 0;
 
    /* Cleanup CPU caches */
    KeFlushCurrentTb();
 
    /* Restore the old IRQL */
#ifndef CONFIG_SMP
    if (KiOldIrql < DISPATCH_LEVEL)
#endif
    KeLowerIrql(KiOldIrql);
 
    /* Re-enable interrupts */
    KeRestoreInterrupts(Enable);
}

Referenced by KdExitDebugger().

Variable Documentation

KiFreezeFlag

ULONG KiFreezeFlag

Definition at line 20 of file freeze.c.

Referenced by KdEnterDebugger(), KeFreezeExecution(), and KeThawExecution().

KiOldIrql

KIRQL KiOldIrql

Definition at line 19 of file freeze.c.

Referenced by KeFreezeExecution(), and KeThawExecution().