On Tue, Dec 1, 2020 at 1:30 PM Alexei Starovoitov <alexei.starovoitov@xxxxxxxxx> wrote: > > On Mon, Nov 30, 2020 at 7:49 PM Andrii Nakryiko <andrii@xxxxxxxxxx> wrote: > > > > Implement libbpf support for performing CO-RE relocations against types in > > kernel module BTFs, in addition to existing vmlinux BTF support. > > > > This is a first step towards fully supporting kernel module BTFs. Subsequent > > patch sets will expand kernel and libbpf sides to allow using other > > BTF-powered capabilities (fentry/fexit, struct_ops, ksym externs, etc). For > > CO-RE relocations support, though, no extra kernel changes are necessary. > > > > This patch set also sets up a convenient and fully-controlled custom kernel > > module (called "bpf_testmod"), that is a predictable playground for all the > > BPF selftests, that rely on module BTFs. > > > > v2->v3: > > - fix subtle uninitialized variable use in BTF ID iteration code; > > While testing this patch I've hit this: Right, I ran into that while testing the second patch set (fexit/fentry one), and fixed in patch "bpf: keep module's btf_data_size intact after load". But I've mistakenly added it to the second patch set, not to this one, my bad. I'll move it into this one. Or maybe I should just combine those two now for easier logistics? [...]
