Hi, Johnson:
Thanks a lot.
Usually stack locates on top of heap area,
After swapping stack and heap’s location, your method seems ok.
Thanks
发件人: Brian J. Johnson
发送时间: 2022年9月23日 5:07
收件人: Tiger Liu(BJ-RD) ; devel@edk2.groups.io; Ni, Ray
主题: Re: [edk2-devel] How to guard CAR's stack ove
I've never tried protecting the stack like this, so I'm not sure exactly
what you're running in to. The documentation says the base address is
specified a bit differently for expand-down descriptors. It needs to
point to the page below the stack (lower addresses.) The descriptors
for the othe
: Brian J. Johnson mailto:brian.john...@hpe.com>>
发送时间: 2022年9月20日 7:10
收件人: devel@edk2.groups.io<mailto:devel@edk2.groups.io>;
ray...@intel.com<mailto:ray...@intel.com>; Tiger Liu(BJ-RD)
mailto:tiger...@zhaoxin.com>>
抄送: Fan, Jeff mailto:fanjianf...@byosoft.com.cn>&g
You could also try modifying the Ia32 segment descriptors to mark the
stack segment as an "expand down" type with a limit set just below the
low end of the stack area. That should generate a stack-fault exception
if the stack overflows, and wouldn't require building page tables. See
sections
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.g
