On Tue, Dec 20, 2022 at 3:56 AM SuHsueyu <anolasc13@xxxxxxxxx> wrote:
>
> Hello, I use gcc 12.1.0 to compile a source file:
> t.c
> struct t {
> int a:2;
> int b:3;
> int c:2;
> } g;
> with gcc -c -gbtf t.c
> and try to use libbpf API btf__parse_split, bpf_object__open, and
> bpf_object__open to parse and load into the kernel, but it failed with
> "libbpf: elf: /path/to/t.o is not a valid eBPF object file".
if (ehdr->e_type != ET_REL || (ehdr->e_machine && ehdr->e_machine != EM_BPF))
This check is failing in libbpf. So check which of those two are not
set appropriately. cc Jose to point where to report GCC-BPF specific
issues.
>
> Is it wrong for me to do so? Due to some constraint, I cannot use
> clang but gcc. How to parse and load gcc compiled object file with
> libbpf?
