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user address space: Virtual Address Space Layout386BSD executed programs with a virtual address similar to a VAX running UNIX. In February 1991, this changed so that the format of the process virtual address space memory usage could be arranged differently. Per-Process Data StructuresA UNIX legacy, the "u." or per-process data structure, which held the kernel-related data of a process, was present on 386BSD prior to February 1991. |