Messages in this thread | | | Date | Sat, 30 Mar 2024 08:27:55 -0400 | From | Steven Rostedt <> | Subject | Re: [External] Re: [PATCH bpf-next v2 1/9] bpf: tracing: add support to record and check the accessed args |
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On Fri, 29 Mar 2024 16:28:33 -0700 Andrii Nakryiko <andrii.nakryiko@gmail.com> wrote:
> I thought I'll just ask instead of digging through code, sorry for > being lazy :) Is there any way to pass pt_regs/ftrace_regs captured > before function execution to a return probe (fexit/kretprobe)? I.e., > how hard is it to pass input function arguments to a kretprobe? That's > the biggest advantage of fexit over kretprobe, and if we can make > these original pt_regs/ftrace_regs available to kretprobe, then > multi-kretprobe will effectively be this multi-fexit.
This should be possible with the updates that Masami is doing with the fgraph code.
-- Steve
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