US Patent Issued to Arm on Sept. 8 for "Exception return state lock parameter" (British Inventors)

ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,730,638, issued on Sept. 8, was assigned to Arm Ltd. (Cambridge, Great Britain).

"Exception return state lock parameter" was invented by Simon John Craske (Cambridge, Great Britain) and John Michael Horley (Hauxton, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus comprises exception return state register storage, and processing circuitry. In response to a guarded control stack (GCS) exception return state push instruction, the processing circuitry obtains exception return state information from the exception return state register storage and push the state information to a GCS data structure. In response to a GCS exception retu...