Messages in this thread | | | Date | Tue, 7 May 2019 08:27:16 -0400 | From | Steven Rostedt <> | Subject | Re: [RFC][PATCH 1/2] x86: Allow breakpoints to emulate call functions |
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On Tue, 7 May 2019 11:27:31 +0200 Peter Zijlstra <peterz@infradead.org> 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
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