It’s doable.
You need to enable paging and mark the very low 4K area of the stack as not-present.
You could use the UefiCpuPkg/Library/CpuPageTableLib to help you create the 1:1 page table with the specific
4K area as not-present (if you are using x86 processors).

Thanks,
Ray

From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Tiger Liu(BJ-RD)
Sent: Thursday, September 15, 2022 8:50 AM
To: devel@edk2.groups.io
Subject: [edk2-devel] How to guard CAR's stack overflow

Hi, Experts:
Usually, we use Cache As Ram to setup stack and heap for C language running environment before permanent memory has been initialized.

So, is there a method to guard this phase’s stack overflow?

Note:
I find udk has introduced a method to guard stack overflow after memory has been initialized and discovered.

Thanks

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