Technique for controlling manipulation of pointers
A pointer control prefix instruction in data processing systems controls pointer updates, ensuring validity and security without dedicated instructions, addressing unauthorized manipulation and maintaining compatibility.
GB2634058BActive Publication Date: 2026-06-11ARM LTD
Patent Information
- Authority / Receiving Office
- GB · GB
- Patent Type
- Patents
- Current Assignee / Owner
- ARM LTD
- Filing Date
- 2023-09-28
- Publication Date
- 2026-06-11
AI Technical Summary
Technical Problem
Existing data processing systems lack a mechanism to control the manipulation of pointers effectively, as they treat pointers and general-purpose data similarly, leading to potential unauthorized updates and security vulnerabilities.
Method used
Incorporating a pointer control prefix instruction that generates control signals to modify the behavior of subsequent data processing instructions, ensuring valid pointer operations without requiring dedicated pointer-specific instructions, and utilizing metadata to validate pointer updates.
Benefits of technology
This approach ensures valid pointer updates, maintains security by preventing unauthorized memory access, and supports backwards compatibility with existing systems, reducing performance overhead.
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Abstract
An apparatus is disclosed comprising decoder circuitry to decode instructions, wherein the decoder circuitry is responsive to a sequence of instructions to generate control signals, and processing cir
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