Add a set of __arg_xxx macros which can be used to augment BPF global
subprogs/functions with extra information for use by BPF verifier.
Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
---
tools/lib/bpf/bpf_helpers.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/tools/lib/bpf/bpf_helpers.h b/tools/lib/bpf/bpf_helpers.h
index 77ceea575dc7..6e3f24f569b7 100644
--- a/tools/lib/bpf/bpf_helpers.h
+++ b/tools/lib/bpf/bpf_helpers.h
@@ -188,6 +188,15 @@ enum libbpf_tristate {
!!sym; \
})
+#define __arg_nonnull __attribute((btf_decl_tag("arg:nonnull")))
+
+#define __arg_ctx __attribute__((btf_decl_tag("arg:ctx")))
+#define __arg_dynptr __attribute__((btf_decl_tag("arg:dynptr")))
+
+#define __arg_pkt_meta __attribute__((btf_decl_tag("arg:pkt_meta")))
+#define __arg_pkt_data __attribute__((btf_decl_tag("arg:pkt_data")))
+#define __arg_pkt_end __attribute__((btf_decl_tag("arg:pkt_end")))
+
#ifndef ___bpf_concat
#define ___bpf_concat(a, b) a ## b
#endif
--
2.34.1
