Memory Access Control Using Execution Context and Region Permissions

The patent segments memory access control by introducing region identifiers that divide memory space into distinct regions, each with its own access permissions. This allows different parts of a process to have different memory access rights, achieving fine-grained control while maintaining a relatively simple implementation through regional segmentation rather than complex per-address control

The patent applies local quality by assigning different permission attributes to different memory regions within the same process. Each region can have customized access permissions (read, write, execute) based on its specific security requirements, allowing security policies to be tailored locally to each memory region rather than applying uniform process-level permissions

The patent implements a nested control structure where region identifiers and permissions tables are embedded within the existing memory management framework. The security control mechanism is nested inside the memory access path, adding security checks without requiring a complete redesign of the memory management system, thus maintaining relative simplicity while enhancing security

The patent introduces region identifiers and permissions tables as intermediary structures between the process and memory addresses. These intermediaries translate memory access requests into security checks, providing an additional layer of security control without directly modifying the fundamental process-memory interface, thereby maintaining system simplicity while improving security