[ros-kernel] ReactOS stacks - where is the stack fault handling code?

[Mark W. <ma...@np...>]

Hi,

Here's my understanding of stacks in NT/ReactOS:

(1) Reserve a lump of memory for the stack
(2) Commit 2 pages; one stack page and one guard page
(3) Change the protection on the guard page so that it is a guard page

When the guard page is touched, NT commits a new page to act as the guard
page.

As far as the fault handler seems to be concerned it wants to know:

StackBase
StackLimit

*AND*
DeallocationStack

the DeallocationStack is used for freeing the stack/checking whether you can
actually commit more pages.  If the stack would grow beyond its reserve size
then we raise a stack fault, and let the app handle it or barf. Of these
items, we have the first two stored in the NT_TIB structure and the final
one stored in the _TEB structure (which seems odd - any ideas why?).
My question is - where is the fault handler in ReactOS that commits the
extra page?  Sorry to ask, but I've had a dig around for likely looking code
(references to TEB, StackBase, DeallocationStack) and I can't seem to find
it!  Plus, am I correct in that the above information is all that the stack
fault handling code is interested in?

Thanks,

Mark

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