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    Subject[PATCH 0/2] fix sysenter for 32-on-64 processes
    Hi Ingo,

    Here's a little two-part patch series which fixes 32-on-64 syscalls
    using sysenter.

    The first is a difference in ordering in arch_setup(); the 64-bit code
    was calling early_init_cpu() way too late. Moving it earlier, to the
    same place as the 32-bit code, works for me, but I wonder if it might
    cause problems with other configurations. Certainly it makes logical
    sense that both architectures do the same cpu setup at the same place.

    The other fix is an outright Xen-specific bug, which resulted in
    usermode registers being trashed as a result of an over-enthusiastic use
    of sysret.

    Both patches are .27 material, but I expect the arch_setup() change
    needs to cooking before being comfortable with it.


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      Last update: 2008-07-22 01:53    [W:0.019 / U:3.468 seconds]
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