On 12/20, SuHsueyu 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".
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?
I haven't used gcc myself, so can't really help. All I can do is to
point you to these two places:
* https://gcc.gnu.org/wiki/BPFBackEnd
* tools/testing/selftests/bpf/Makefile
Maybe try to follow the instructions on that BPFBackEnd page and try
to compile kernel's selftests to see what's missing?
