On Wed, May 22, 2019 at 02:49:07PM +0000, Alexei Starovoitov wrote: > The one that is broken is prog_tests/stacktrace_map.c > There we attach bpf to standard tracepoint where > kernel suppose to collect pt_regs before calling into bpf. > And that's what bpf_get_stackid_tp() is doing. > It passes pt_regs (that was collected before any bpf) > into bpf_get_stackid() which calls get_perf_callchain(). > Same thing with kprobes, uprobes. Is it trying to unwind through ___bpf_prog_run()? If so, that would at least explain why ORC isn't working. Objtool currently ignores that function because it can't follow the jump table. -- Josh
