#libbpf — Public Fediverse posts

PPAs Updates

Latest versions of BCC (v0.29.1) and libbpf (v1.3.0) are now available from the bpftrace PPA for bionic, focal and jammy. There's also latest bpftrace (0.19.0) available but only for jammy (I [...]

🔗 https://chbk.co/GdMhw

#ubuntu #bpfcc #bcc #bpftrace #libbpf

Today's bug is a `libbpf` bug: https://lore.kernel.org/bpf/ZXcFRJVKbK[email protected]/

`bpftool` fails to recognize `BPF` programs. But it does it only when all of the below are true:

1. ran on 32-bit host system (`bpftool` is a 32-bit `ELF`)
2. `BPF` is compiled with compressed debug sections, like `-Wa,--compress-debug-sections` flag

Error: failed to link 'bpf.o': Invalid argument (22)

With https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=32fa058398624166dd04ff4af49cfef69c94abbc

it now says

libbpf: ELF section #9 has inconsistent alignment addr=8 != d=4 in bpf.o

#libbpf #bug