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    SubjectRe: vm86 segfaults with NX bit
    Takashi Iwai wrote:
    >>>>
    >>> did the code that mapped this memory setup use PROT_EXEC ?
    >> A good question...
    >> Luc, Egbert, how does VESA driver handle it?
    >
    > Just looking through the vesa directory of xorg-server code, PROT_EXEC
    > is passed for all mappings, at least.
    >
    > Please correct me if I'm looking at a wrong place...
    >

    Please do an strace of the X server startup up to the point of the crash.

    I am betting that PROT_EXEC is missing from an mmap(), or that it needs
    an additional mprotect().

    -hpa



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