GCSSS2 Guarded Control Stack switch stack 2 This instruction validates that the most recent entry of the Guarded Control Stack being switched to contains an In-progress cap entry, stores a Valid cap entry to the Guarded Control Stack that is being switched from, and sets Xt to the Guarded Control Stack pointer that is being switched from. SYSL 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 1 1 0 1 1 1 0 1 1 GCSSS2 <Xt> SYSL <Xt>, #3, C7, C7, #3 Unconditionally <Xt> Is the 64-bit name of the general-purpose destination register, encoded in the "Rt" field. 2026-03-12 12:23:09 2025-09_rel_asl1