DEP requires the use of 64-bit page table entries as supported by the Physical Address Extension (PAE) feature. ![]() Support for DEP is established by executing the CPUID instruction with 0x80000001 in EAX and testing for the Execute Disable bit (0x00100000) in the feature flags that are returned in EDX. It depends on a relatively recent CPU feature which Intel names Execute Disable and Microsoft calls Data Execution Prevention (DEP). ![]() Behaviour The nx option governs how Windows defends against attempts to execute data. For first years, ‘The Praetorian Camp and the Emperor During the Early Principate’ is a useful overview of both parties and their interactions throughout the Mods-relevant period of Roman history. ![]() This is also the syntax for the option as a BOOT.INI switch in earlier Windows versions. Syntax To have the BCDEDIT tool set the nx option for the currently running operating system, run the command bcdedit /set nx value where value is either a decimal number from the first column of the following table or a string from the second: 0 OptIn /NOEXECUTE=OPTIN 1 OptOut /NOEXECUTE=OPTOUT 2 AlwaysOff /EXECUTE /NOEXECUTE=ALWAYSOFF 3 AlwaysOn /NOEXECUTE=ALWAYSON The third column shows the command-line switch to use if setting this option at the. ![]() Geoff Chappell - Software Analyst Boot Options: nx The nx option specifies a behaviour for Data Execution Prevention.
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