Package: bpftool
Version: 6.8.0+5.18.14-1
Severity: normal
Dear Maintainer,
I was trying to dump the jited version of a BPF program that was pinned in
/sys/fs/bpf but I received a warning about libbpf that it wasn't supported.
Here is the content of the minimalist BPF program:
==
#include
#include
SEC("socket")
int bpf_prog (struct __sk_buff *skb)
{
return 1;
}
==
Built with:
#> clang -target bpf -o basic.o -c basic.c
Inserted and pinned:
#(root)> bpftool prog load basic.o /sys/fs/bpf/bar
Checking that it is present in the loaded BPF programs:
#(root)> bpftool prog list
...
37: type 31 name bpf_prog tag cba989f8e5d0e900
loaded_at 2022-08-02T16:31:18+0200 uid 0
xlated 24B jited 29B memlock 4096B
Dump the BPF format:
#(root)> bpftool prog dump xlated id 37
0: (7b) *(u64 *)(r10 -8) = r1
1: (b7) r0 = 1
2: (95) exit
Attempt to dump the jitted format:
#(root)> bpftool prog dump jited pinned /sys/fs/bpf/foo
Error: No libbfd support
I suppose that the support for BPF must be add to libbfd in the binutils-dev
package by default.
Feel free to ask for more details if I was not clear in my report.
-- System Information:
Debian Release: bookworm/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 5.18.0-3-amd64 (SMP w/8 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:\
en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages bpftool depends on:
ii libc62.33-8
ii libcap2 1:2.44-1
ii libelf1 0.187-1
ii zlib1g 1:1.2.11.dfsg-4
bpftool recommends no packages.
bpftool suggests no packages.
-- no debconf information
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