On Sat, May 23, 2020 at 8:57 AM Arvind Sankar wrote:
>
> (1) We assume that registers that are set in 32-bit mode will have their
> upper 32 bits clear when we switch to 64-bit mode.
Realistically, I don't think that is what happens.
The upper bits probably won't actually be affected at all by
On Sat, May 23, 2020 at 8:57 AM Arvind Sankar wrote:
>
> Hi,
>
> I have a question about the state of the upper 32 bits of the general
> purpose registers following a switch from/to 64-bit mode.
>
> Both the AMD [0] and Intel [1] manuals state that these bits are
> undefined following a switch
Hi,
I have a question about the state of the upper 32 bits of the general
purpose registers following a switch from/to 64-bit mode.
Both the AMD [0] and Intel [1] manuals state that these bits are
undefined following a switch from 64 to 32-bit mode. Since they can't be
accessed in 32-bit mode,
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