Messages in this thread | | | Subject | Re: question on memory map of process on i386 | From | Steven Rostedt <> | Date | Wed, 03 Aug 2005 23:56:07 -0400 |
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On Wed, 2005-08-03 at 17:28 -0600, Christopher Friesen wrote: > On i386, /proc/<pid>/maps shows the following entry: > > ffffe000-fffff000 ---p 00000000 00:00 0 > > This page of memory is way up above TASK_SIZE (which is 0xc0000000), so > how is it visible to userspace? > > Just to complicate things, I seem to find the vma for this page using > find_vma_prev(). > > Can anyone explain what's going on? >
Looking at the code, it seems to be the "gate area". But what this is used for, I'm not really sure. I did a little searching but found no good explanations of it. So I added Keith to the CC since most of the updates to this was submitted by him :-)
-- Steve
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