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Re: GCC and Meltdown and Spectre vulnerabilities
- From: Will Hawkins <whh8b at virginia dot edu>
- To: Eric Gallager <egall at gwmail dot gwu dot edu>
- Cc: GCC Development <gcc at gcc dot gnu dot org>
- Date: Thu, 4 Jan 2018 22:12:05 -0500
- Subject: Re: GCC and Meltdown and Spectre vulnerabilities
- Authentication-results: sourceware.org; auth=none
- References: <CAMfHzOtmtS9JcbXz0S4PF+ecpCL7nFa=6nLR56S7AY-jMazyYQ@mail.gmail.com>
On Thu, Jan 4, 2018 at 10:10 PM, Eric Gallager <egall@gwmail.gwu.edu> wrote:
> Is there anything GCC could be doing at the compiler level to mitigate
> the recently-announced Meltdown and Spectre vulnerabilities? From
> reading about them, it seems like they involve speculative execution
> and indirect branch prediction, and those are the domain of things the
> compiler deals with, right? (For reference, Meltdown is CVE-2017-5754,
> and Spectre is CVE-2017-5753 and CVE-2017-5715)
>
> Just wondering,
> Eric
Check out
https://support.google.com/faqs/answer/7625886
and especially
http://git.infradead.org/users/dwmw2/gcc-retpoline.git/shortlog/refs/heads/gcc-7_2_0-retpoline-20171219
I'd love to hear what other people have heard!
Will