Error: No JIT disassembly support

libbpf / bpftool

Automated upstream mirror for bpftool stand-alone build.

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Error: No JIT disassembly support #112

Closed LikeTheWindGone closed 1 year ago

LikeTheWindGone commented 1 year ago

after loading .o file to kernel, use

bpftool prog dump jited id 42

to see disassembly code , but the output is

Error: No JIT disassembly support

platform: ubuntu 23 on vmware bpftool version: bpftool v7.1.0 using libbpf v1.1

how to fix that?

qmonnet commented 1 year ago

Hi, where did you get your bpftool binary from? Ubuntu packages bpftool without the JIT disassembler, so if you installed from the APT repositories, this is expected. If you compiled yourself, this means that you (likely) didn't have the relevant libraries for supporting the feature.

In both cases, you'll have to get a new binary:

You can get one from the release artifacts on this repo (for example, from here: https://github.com/libbpf/bpftool/releases/tag/v7.2.0)
You can compile one from the sources in this repo; make sure you have the development files of either libbfd or llvm before compiling (on Ubuntu I think they're shipped with binutils-dev or llvm-dev, respectively).

LikeTheWindGone commented 1 year ago

yes, i get my bpftool from ubuntu apt repositories, thank you