Re: [PATCH v11 25/25] x86/cet/shstk: Add arch_prctl functions for shadow stack

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On 9/1/2020 10:50 AM, Florian Weimer wrote:
* Yu-cheng Yu:

Like other arch_prctl()'s, this parameter was 'unsigned long'
earlier. The idea was, since this arch_prctl is only implemented for
the 64-bit kernel, we wanted it to look as 64-bit only.  I will change
it back to 'unsigned long'.

What about x32?  In general, long is rather problematic for x32.

The problem is the size of 'long', right?
Because this parameter is passed in a register, and only the lower bits are used, x32 works as well.



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