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[Bug translator/23866] dissonance between kernel tracepoint parametrization, lkm vs bpf
- From: "wcohen at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sourceware dot org
- Date: Wed, 19 Jun 2019 15:02:53 +0000
- Subject: [Bug translator/23866] dissonance between kernel tracepoint parametrization, lkm vs bpf
- Auto-submitted: auto-generated
- References: <bug-23866-6586@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=23866
--- Comment #4 from William Cohen <wcohen at redhat dot com> ---
Outline changes to make use of BPF_RAW_TRACEPOINTS
- test and note whether kernel has BPF_PROG_TYPE_RAW_TRACEPOINT available
- reuse the tapsets.cxx for the lkm code to discover the arguments for bpf raw
tracepoints
- modify tapsets.cxx tracepoint_derived_probe::build_args_for_bpf to generate
args for raw_tracepoints
bpf raw tracepoints have a array of elelements pointed to by r1
- modify the generate tracepoint section names to note when using "raw_trace"
- modify stapbpf.cxx to handle "raw_trace" as another section type
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