On Tue, 7 May 2019 11:27:31 +0200
Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> FWIW, both these trampolines assume a kprobe will not
> int3_emulate_{push/call}(), for both bitnesses.
>
> But then; I'm thinking kprobes should be inspection only and not modify
> things. So that might just be good enough.
I believe there are kprobe calls that do modify things. Note, they can
modify regs->ip. Kprobes sets the FTRACE_OPS_FL_IPMODIFY flag, thus
they can never be put at the same location that is being live patched.
-- Steve
