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libbpf: Treat STV_INTERNAL same as STV_HIDDEN for functions

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Do the same global -> static BTF update for global functions with STV_INTERNAL
visibility to turn on static BPF verification mode.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210507054119.270888-7-andrii@kernel.org
This commit is contained in:
Andrii Nakryiko 2021-05-06 22:41:18 -07:00 committed by Alexei Starovoitov
parent 247b8634e6
commit e5670fa029
1 changed files with 6 additions and 5 deletions
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11
tools/lib/bpf/libbpf.c
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@ -700,13 +700,14 @@ bpf_object__add_programs(struct bpf_object *obj, Elf_Data *sec_data,
if (err) if (err)
return err; return err;
/* if function is a global/weak symbol, but has hidden /* if function is a global/weak symbol, but has restricted
* visibility (STV_HIDDEN), mark its BTF FUNC as static to * (STV_HIDDEN or STV_INTERNAL) visibility, mark its BTF FUNC
* enable more permissive BPF verification mode with more * as static to enable more permissive BPF verification mode
* outside context available to BPF verifier * with more outside context available to BPF verifier
*/ */
if (GELF_ST_BIND(sym.st_info) != STB_LOCAL if (GELF_ST_BIND(sym.st_info) != STB_LOCAL
&& GELF_ST_VISIBILITY(sym.st_other) == STV_HIDDEN) && (GELF_ST_VISIBILITY(sym.st_other) == STV_HIDDEN
|| GELF_ST_VISIBILITY(sym.st_other) == STV_INTERNAL))
prog->mark_btf_static = true; prog->mark_btf_static = true;
nr_progs++; nr_progs++;