Re: [edk2-devel] [PATCH edk2-non-osi v2 1/1] Emulator/X86EmulatorDxe: Replace with MultiArchUefiPkg build

["Rebecca Cran" <rebecca@bsdio.com>]

On 9/9/24 10:13 AM, Ard Biesheuvel via groups.io wrote:
> On Mon, 9 Sept 2024 at 18:11, Rebecca Cran <rebecca@bsdio.com> wrote:
>> Replace the old X86EmulatorDxe with one built from
>> https://github.com/intel/MultiArchUefiPkg. This is a much more modern,
>> recent implementation that's more reliable and is actively maintained.
> What was the conclusion in the end regarding NULL pointer deref handling?

Andrei (cc'd) said:


"- All memory but the zero page is visible to the emulator. See 
CpuNullReadCb/CpuNullWriteCb. See also TestNullDeref in 
Application/EmulatorTest. I don't remember if I added the behavior 
because this is what the original did, or because I actively tripped on 
the NULL accesses from some x86 code I was testing..."


I don't know if that resolved the concern or not.


--
Rebecca



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