Re: [PATCH 0/5] trace-cmd: Use BTF to parse function arguments

On Mon, 4 Aug 2025 15:28:58 +0100
Douglas Raillard <[email protected]> wrote:

> Sounds like a good idea. If you want to support passing BTF at report time to supplement a BTF-less trace.dat,
> it would make sense to also support getting BTF from the ELF section so that people can pass the real
> vmlinux file directly (not the BTF blob in sysfs, the actual ELF vmlinux from Kbuild).
> 
> It seems libbpf allows to do that with bpf_object__open_file():
> https://docs.ebpf.io/ebpf-library/libbpf/userspace/bpf_object__open_file/
> 

Yeah, but then it adds a dependency that I'm trying to limit.

Parsing elf files for sections is quite trivial. I've done that a lot. I
may just add a: --btf-elf /path/to/elf-file

-- Steve