What is the call gate?

Call gateway is a processor function in Intel ™ Central Processing Units (CPU). It allows a dynamic change in the level of CPU privileges using certain instructions. This allows the code and programs with a smaller number of privileges to temporarily act as if they were higher privileged programs. The main advantage of the call gate is the program's ability to execute a high -level command in a system with a much faster response time than calling the advancing gate of interruption. One of the disadvantages is the potential for unauthorized programs to circumvent security measures using call gates.

Think about the call gate as a rear door in a processor through which higher levels can be made, such as editing information stored in memory. Although almost all computer programs have reason to perform these types of commands, most programs are necessarily limited in their authorized operating system. This prevents non -turbulent -mumanipulation of the computer with a potentially malicious code. Operating systemIt is that routine calls to the processor via the call gate are legitimate. This additional level of security protects the computer from most types of basic hacker threats.

Some viruses specifically attacked computer calls. By acting as a legitimate program, worms and viruses can gain access to the call gate, allowing them to take control of the features of a higher computer level. This may potentially endanger the security and personal data about the system, which illustrates the importance of constant updating of the operating system, as the call gate is used, are often repaired - repaired by revisions of the operating system - once discovered.

Call Gates use only certain processors produced over a limited span. Newer methods are generally faster than call gates, as well as call gates are faster than traditional interruption. The main disadvantage of these newer methods is that they allowOnly the program permissions permissions to a predetermined level, where as a gate of call, it can decide what level of the privilege to assign the program regardless of.