Commit eb707dde authored by Yonghong Song's avatar Yonghong Song Committed by Alexei Starovoitov
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bpf: arm64: No support of struct argument in trampoline programs 



ARM64 does not support struct argument for trampoline based
bpf programs yet.

Signed-off-by: default avatarYonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/20220831152702.2079066-1-yhs@fb.com


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 27ed9353

arch/arm64/net/bpf_jit_comp.c

+7 −1
Original line number Diff line number Diff line
@@ -1970,7 +1970,7 @@ int arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, void *image, 
				u32 flags, struct bpf_tramp_links *tlinks,

				void *orig_call)

{

	int ret;

	int i, ret;

	int nargs = m->nr_args;

	int max_insns = ((long)image_end - (long)image) / AARCH64_INSN_SIZE;

	struct jit_ctx ctx = {
@@ -1982,6 +1982,12 @@ int arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, void *image, 
	if (nargs > 8)

		return -ENOTSUPP;



	/* don't support struct argument */

	for (i = 0; i < MAX_BPF_FUNC_ARGS; i++) {

		if (m->arg_flags[i] & BTF_FMODEL_STRUCT_ARG)

			return -ENOTSUPP;

	}



	ret = prepare_trampoline(&ctx, im, tlinks, orig_call, nargs, flags);

	if (ret < 0)

		return ret;