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    SubjectRe: New vsyscall emulation breaks JITs
    On Fri, Aug 05, 2011 at 01:48:28PM -0700, H. Peter Anvin wrote:
    > On 08/05/2011 01:45 PM, Andrew Lutomirski wrote:
    > >
    > > hpa: time is supported (as of 3.0) by the vdso, and very new glibc
    > > uses the vdso version. We could add a native time implementation back
    > > to the vsyscall page without too much pain as a short-term fix, but
    > > that would be less than ideal.
    > >
    >
    > How new does glibc have to be?

    Mine from May 17 doesn't support it.

    > How much of a pain would it be to make the legacy vs emulated vsyscall
    > page a config option?

    CONFIG_DONT_BREAK_MY_BINARIES?

    If anything runtime, but really for me it looks like the vsyscall
    changes should be only in one of those limited compability paranoia
    patchkits.

    -Andi

    --
    ak@linux.intel.com -- Speaking for myself only.


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