On Thu, May 24, 2018 at 1:26 PM Nick Desaulniers <[email protected]> wrote: > On Thu, May 24, 2018 at 11:59 AM <[email protected]> wrote: > > Issue 3: Let's face it, reading and writing the flags should be builtins, > exactly because it has to do stack operations, which really means the > compiler should be involved.
> I'm happy to propose that as a feature request to llvm+gcc. Oh, looks like both clang and gcc have: __builtin_ia32_readeflags_u64() https://godbolt.org/g/SwPjhq Maybe native_save_fl() and native_restore_fl() should be replaced in the kernel with __builtin_ia32_readeflags_u64() and __builtin_ia32_writeeflags_u64()? -- Thanks, ~Nick Desaulniers
