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    SubjectRe: [PATCH] linux-2.5.43_vsyscall_A0
    On Sun, Oct 20, 2002 at 03:50:37AM +0200, Rik van Riel wrote:
    > On Fri, 18 Oct 2002, Jeff Dike wrote:
    >
    > > My preferred solution would be for libc to ask the kernel where the
    > > vsyscall area is. That's reasonably clean and virtualizable. Andrea
    > > doesn't like it because it adds a few instructions to the vsyscall
    > > address calculation.
    >
    > Sounds like the best solution indeed, especially when keeping
    > in mind the strange people who want to run with a different
    > user:kernel split or statically linked binaries at fun addresses
    > so they've got more space for their fortran arrays ;)

    x86-64 addresses that (not that it would need it) by putting vsyscalls at
    the top of the virtual mapping after the direct mapped area. This part
    never moves even with changed __PAGE_OFFSET. The same technique should work
    on i386 too.

    -Andi
    -
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