zzheng added a comment. In D84414#2234112 <https://reviews.llvm.org/D84414#2234112>, @lenary wrote:
> Why do we have to pass `-ffixed-x18` when compiling? Is it enough to just > reserve `x18` whenever the function has the shadow call stack attribute? When SCS is on, x18 must be preserved across calls. Given it's a callee-saved, value in x18 is preserved by functions that do not have SCS attribute. However, saving x18 on stack risks leaking SCS's location in memory, making the defense useless. Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D84414/new/ https://reviews.llvm.org/D84414 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
