gcc version 4.8.5 20150623 / Meltdown and/or Spectre vulnerabilities
Fri Jun 15 15:22:00 GMT 2018
On 06/15/2018 08:58 AM, Xi Ruoyao wrote:
> On 2018-06-15 17:42 +0300, Vassilena Treneva wrote:
>> Using gcc version 4.8.5 20150623 (Red Hat 4.8.5-4) (GCC).
>> Do you know if there are any compiler options (or a patch) to mitigate the
>> so called: Meltdown and/or Spectre vulnerabilities for this specific
>> version of the compiler?
>> Based on what I read over the internet, the answer is NO. Such options and
>> a patch are available starting from GCC 8:
> The compiler has nothing to do with Meltdown and Spectre v1. For Spectre v2
> GCC 8.1 and 7.3 have -mindirect-branch option.
> GCC 4.8 is no longer supported by GCC team. Maybe Red Hat could backport
> this patch for you.
Red Hat has already backported ported the spectre v2 mitigations to its
gcc-4.8 compilers for RHEL 7, its gcc-4.4 compilers for RHEL 6 and its
gcc-4.1 compilers for RHEL 5.
These compilers (and kernels which use those mitigations) are available
via the usual channels.
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