Re: [PATCH bpf-next] selftests/bpf: Fix build of callx tests with GCC

[Ihor Solodrai <ihor.solodrai@linux.dev>]

On 9/24/26 11:21 AM, Alexei Starovoitov wrote:
> From: Alexei Starovoitov <ast@kernel.org>
> 
> GCC doesn't support indirect calls in BPF:
> 
>   progs/verifier_callx.c: In function 'apply_op':
>   progs/verifier_callx.c:977:1: error: indirect call in function, which are not supported by eBPF
>   progs/verifier_callx_rodata.c: In function 'use_shape':
>   progs/verifier_callx_rodata.c:746:1: error: indirect call in function, which are not supported by eBPF
> 
> Build verifier_callx, verifier_callx_rodata and callx_rodata progs
> with clang only. Skip callx_rodata_lskel test when progs are built
> with GCC.
> 
> Fixes: e9b22d50796d ("selftests/bpf: Add tests for callx")
> Fixes: b018e998e645 ("selftests/bpf: Add tests for callx through pointers in read-only data")
> Signed-off-by: Alexei Starovoitov <ast@kernel.org>

Tested-by: Ihor Solodrai <ihor.solodrai@linux.dev>

Confirmed the patch fixes the GCC BPF selftests build:
https://github.com/kernel-patches/vmtest/actions/runs/36043955840/job/107785910578

> ---
>  .../bpf/prog_tests/callx_rodata_lskel.c       |  6 ++++
>  .../selftests/bpf/progs/callx_rodata.c        | 28 +++++++++++++++++--
>  .../selftests/bpf/progs/verifier_callx.c      |  3 +-
>  .../bpf/progs/verifier_callx_rodata.c         |  3 +-
>  4 files changed, 36 insertions(+), 4 deletions(-)
> 
> [...]