On Fri, 2 Feb 2024 at 04:30, Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx> wrote:
>
> ptrace: Introduce exception_ip arch hook
> MIPS: Clear Cause.BD in instruction_pointer_set
> mm/memory: Use exception ip to search exception tables
Just to clarify: does that second patch fix the problem that
__isa_exception_epc() does a __get_user()?
Because that mm/memory.c use of "exception_ip()" most definitely
cannot take a page fault.
So if MIPS cannot do that whole exception IP thing without potentially
touching user space, I do worry that we might just have to add a
#ifndef __MIPS__
around this all.
Possibly somehow limited to just the microMIPS/MIPS16e case in Kconfig instead?
Linus
