Messages in this thread | | | Date | Fri, 28 Apr 2017 08:33:23 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH v8 1/4] syscalls: Verify address limit before returning to user-mode |
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* Thomas Garnier <thgarnie@google.com> wrote:
> > BTW., a further simplification would be: > > > > #ifndef ADDR_LIMIT_CHECK_PRE > > # define ADDR_LIMIT_CHECK_PRE ... > > #endif > > > > This way architectures could override this generic functionality simply by > > defining the helpers. Architectures that don't do that get the generic version. > > I don't think architectures need to do that. The optimizations are > embedding the checks on their architecture-specific code to make it > faster and remove the size impact. The pre/post is fine for the rest.
Indeed, only the generic code needs to turn off that code - architectures will place these callbacks elsewhere.
Thanks,
Ingo
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