公开(公告)号：US20210019268A1

公开(公告)日：2021-01-21

申请号：US16981816

申请日：2019-02-12

Applicant: Arm Limited

Inventor： Graeme Peter BARNES ,  Jasen Milov BORISOV

IPC: G06F12/14 ,  G06F12/0853 ,  G06F12/0897 ,  G06F12/1027 ,  G06F9/30 ,  G06F21/79 ,  G06F7/58

Abstract: An apparatus has processing circuitry (4); memory access circuitry (15) to perform a guard tag check for a tag checking target address having an associated address tag, the guard tag check comprising comparing the address tag with a guard tag stored in a memory system in association with a block of one or more memory locations comprising an addressed location identified by the target address; and an instruction decoder (6) responsive to a random tag setting instruction specifying a tag setting target address, to control the processing circuitry (4) to set the address tag associated with the tag setting target address to a random tag value randomly selected from a set of candidate tag values.