diff options
| author | Eduard Zingerman <eddyz87@gmail.com> | 2024-03-06 12:45:26 +0200 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2024-03-06 15:18:16 -0800 |
| commit | 6ebaa3fb88bbe4c33a0e01ce27007e1dd4fd133c (patch) | |
| tree | a57dae4f7884140f99d6b78f9a461b2b16f9f30d /tools/lib/bpf/libbpf_internal.h | |
| parent | 5ad0ecbe056a4ea5ffaa73e58503a2f87b119a59 (diff) | |
libbpf: Rewrite btf datasec names starting from '?'
Optional struct_ops maps are defined using question mark at the start
of the section name, e.g.:
SEC("?.struct_ops")
struct test_ops optional_map = { ... };
This commit teaches libbpf to detect if kernel allows '?' prefix
in datasec names, and if it doesn't then to rewrite such names
by replacing '?' with '_', e.g.:
DATASEC ?.struct_ops -> DATASEC _.struct_ops
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20240306104529.6453-13-eddyz87@gmail.com
Diffstat (limited to 'tools/lib/bpf/libbpf_internal.h')
| -rw-r--r-- | tools/lib/bpf/libbpf_internal.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf_internal.h b/tools/lib/bpf/libbpf_internal.h index ad936ac5e639..864b36177424 100644 --- a/tools/lib/bpf/libbpf_internal.h +++ b/tools/lib/bpf/libbpf_internal.h @@ -374,6 +374,8 @@ enum kern_feature_id { FEAT_UPROBE_MULTI_LINK, /* Kernel supports arg:ctx tag (__arg_ctx) for global subprogs natively */ FEAT_ARG_CTX_TAG, + /* Kernel supports '?' at the front of datasec names */ + FEAT_BTF_QMARK_DATASEC, __FEAT_CNT, }; |