diff options
| author |   Yonghong Song <yhs@fb.com> | 2022-08-31 08:27:02 -0700 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2022-09-06 19:51:14 -0700 |
| commit | eb707dde264af5eb0271156d7fbd59133fa02cac (patch) | |
| tree | 477b3478c53aeea2be2f82bc415998307cb85ad8 /arch/arm64/net/bpf_jit_comp.c | |
| parent | bpf: Update descriptions for helpers bpf_get_func_arg[_cnt]() (diff) | |
| download | linux-dev-eb707dde264af5eb0271156d7fbd59133fa02cac.tar.xz linux-dev-eb707dde264af5eb0271156d7fbd59133fa02cac.zip | |
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: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/20220831152702.2079066-1-yhs@fb.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'arch/arm64/net/bpf_jit_comp.c')
| -rw-r--r-- | arch/arm64/net/bpf_jit_comp.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c index 389623ae5a91..30f76178608b 100644 --- a/arch/arm64/net/bpf_jit_comp.c +++ b/arch/arm64/net/bpf_jit_comp.c @@ -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; |