On Fri, Oct 05, 2018 at 10:13:25AM +0200, Ard Biesheuvel wrote: > Add a function pointer abstraction that can be implemented by the arch > in a manner that avoids the downsides of function pointers, i.e., the > fact that they are typically located in a writable data section, and > their vulnerability to Spectre like defects. > > The FFP (or fast function pointer) is callable as a function, since > the generic incarnation is simply that. However, due to the fact that > C does not distinguish between functions and function pointers at the > call site, the architecture can instead emit it as a patchable sequence > of instructions consisting of ordinary branches. This is basically a static_key, except for indirection function calls? So why not call the thing static_func or static_call or something like that?
