Support Zicfiss (shadow stack access) with CFI extension v0.4.0#1560

aswaterman merged 1 commit intoriscv-software-src:masterriscv-software-src/riscv-isa-sim:masterfrom

SuHo-llrr:cfi-extSuHo-llrr/riscv-isa-sim:cfi-extCopy head branch name to clipboard