Re: recent change to exit_mmap

From: David Mosberger (
Date: Sat Jan 18 2003 - 02:58:18 EST

>>>>> On Fri, 17 Jan 2003 23:53:17 -0800, Andrew Morton <> said:

  Andrew> David Mosberger <> wrote:
>> >>>>> On Fri, 17 Jan 2003 22:44:44 -0800, Andrew Morton
>> <> said:

  Andrew> Looks like ia64 needs work, too...
>> Yes, should be the same problem there. The fix looks fine to
>> me. (Let's just hope I remember it when Linus puts it in his
>> tree...).

  Andrew> I've updated that patch to cover ia64, but I think we'll run
  Andrew> with the other approach - just remove those calls to

  Andrew> They just seem illogical anyway - why are we switching into
  Andrew> the new image's personality prior to unmapping the old
  Andrew> image's memory?

I don't know why SET_PERSONALITY() came to be where it is now, but it
does make some sense to me. One thing that comes to mind: on ia64, we
normally don't map data segments with execute permission but for
backwards-compatibility, we need to do that for x86 binaries. I think
there might be a problem with that if SET_PERSONALITY() was done too
late. Certainly something that could be fixed, but I suspect a
similar ordering issue (perhaps on SPARC?) might have triggered the
current placement of SET_PERSONALITY().

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