samitolvanen wrote:
> I modified the `nocf_check` attribute handler to check for either
> `-cf-protection` or `-fsanitize=kcfi` being enabled.
Looking at this a bit closer, the `nocf_check` attribute also applies to
function pointers with `-fcf-protection`, and disables tracking for indirect
branches. Since KCFI already has the `no_sanitize("kcfi")` attribute for this
purpose, we would presumably just ignore the `nocf_check` attribute on pointers
used for indirect calls when only KCFI is enabled, but preserve the semantics
for assigning and casting the attributed pointers. How does the GCC KCFI
implementation handle this? I would like to make sure both compilers behave the
same way here.
https://github.com/llvm/llvm-project/pull/158133
_______________________________________________
cfe-commits mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
