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| author | Andrii Nakryiko <andrii@kernel.org> | 2021-04-23 21:13:34 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-04-24 00:05:26 +0300 |
| commit | aea28a602fa19fb4fe66374030ab7e2c8ddf643e (patch) | |
| tree | 044aaf22b476bf1e16840f21a1a34eb996eed748 /tools/lib/bpf/btf.c | |
| parent | 0fec7a3cee1cf8e4f86ff563d229408ccbdc2d66 (diff) | |
| download | linux-aea28a602fa19fb4fe66374030ab7e2c8ddf643e.tar.xz | |
libbpf: Mark BPF subprogs with hidden visibility as static for BPF verifier
Define __hidden helper macro in bpf_helpers.h, which is a short-hand for
__attribute__((visibility("hidden"))). Add libbpf support to mark BPF
subprograms marked with __hidden as static in BTF information to enforce BPF
verifier's static function validation algorithm, which takes more information
(caller's context) into account during a subprogram validation.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20210423181348.1801389-5-andrii@kernel.org
Diffstat (limited to 'tools/lib/bpf/btf.c')
| -rw-r--r-- | tools/lib/bpf/btf.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c index d30e67e7e1e5..d57e13a13798 100644 --- a/tools/lib/bpf/btf.c +++ b/tools/lib/bpf/btf.c @@ -1605,11 +1605,6 @@ static void *btf_add_type_mem(struct btf *btf, size_t add_sz) btf->hdr->type_len, UINT_MAX, add_sz); } -static __u32 btf_type_info(int kind, int vlen, int kflag) -{ - return (kflag << 31) | (kind << 24) | vlen; -} - static void btf_type_inc_vlen(struct btf_type *t) { t->info = btf_type_info(btf_kind(t), btf_vlen(t) + 1, btf_kflag(t)); |