Re: [PATCH v26 24/30] x86/cet/shstk: Introduce shadow stack token setup/verify routines

Yu, Yu-cheng
2021-05-18T19:45:28Z

On 5/18/2021 10:58 AM, Borislav Petkov wrote:
> On Tue, May 18, 2021 at 02:14:14AM +0200, Eugene Syromiatnikov wrote:
>> Speaking of which, I wonder what would happen if a 64-bit process makes
>> a 32-bit system call (using int 0x80, for example), and gets a signal.
>
> I guess that's the next patch. And I see amluto has some concerns...
>
> /me goes read.
>

In the next revision, there will be no "signal context extension"
struct. However, the flow for 64, ia32 and x32 will be similar. I will
send that out after some testing.

Thanks,
Yu-cheng