Right now with binutils 25a2915e8dba and gcc r275589 only a handful of
tests work:
# ./test_progs_bpf_gcc
# Summary: 7/39 PASSED, 1 SKIPPED, 98 FAILED
The reason for those failures are as follows:
- Build errors:
- `error: too many function arguments for eBPF` for __always_inline
functions read_str_var and read_map_var - must be inlining issue,
and for process_l3_headers_v6, which relies on optimizing away
function arguments.
- `error: indirect call in function, which are not supported by eBPF`
where there are no obvious indirect calls in the source calls, e.g.
in __encap_ipip_none.
- `error: field 'lock' has incomplete type` for fields of `struct
bpf_spin_lock` type - bpf_spin_lock is re#defined by bpf-helpers.h,
so its usage is sensitive to order of #includes.
- `error: eBPF stack limit exceeded` in sysctl_tcp_mem.
- Load errors:
- Missing object files due to above build errors.
- `libbpf: failed to create map (name: 'test_ver.bss')`.
- `libbpf: object file doesn't contain bpf program`.
- `libbpf: Program '.text' contains unrecognized relo data pointing to
section 0`.
- `libbpf: BTF is required, but is missing or corrupted` - no BTF
support in gcc yet.
Thanks for the nice report.
That will keep me busy for a little while :)
