Re: Why do kprobes and uprobes singlestep?

[Peter Zijlstra]

On Wed, Feb 24, 2021 at 11:45:10AM -0800, Andy Lutomirski wrote:
> I guess I see the point for CALL, JMP and RET, but it seems like we
> could emulate those cases instead fairly easily.

Today, yes. CALL emulation was 'recently' made possible by having #BP
have a stack gap. We have emulation for all 3 those instructions
implemented in asm/text-patching.h, see int3_emulate_$insn().