1. A method for a direct call of a target function, comprising: a first task executing a start function to perform a context switch from a first memory context into a second memory context, wherein the first task is executed on a processor with a memory management unit (MMU) in a computer operated by an operating system, and wherein the start function is a component of the first task with the first memory context, and wherein the target function is a component of a second task with the second memory context; executing the target function in the second memory context; and reversing the context switch to return to the first memory context after executing the target function.