bpftool: Print function linkage in BTF dump (41258289) · Commits · 戴 / test

tools/bpf/bpftool/btf.c

+23 −4

Original line number	Diff line number	Diff line
		@@ -77,6 +77,20 @@ static const char *btf_var_linkage_str(__u32 linkage)
		}
		}

		static const char btf_func_linkage_str(const struct btf_type t)
		{
		switch (btf_vlen(t)) {
		case BTF_FUNC_STATIC:
		return "static";
		case BTF_FUNC_GLOBAL:
		return "global";
		case BTF_FUNC_EXTERN:
		return "extern";
		default:
		return "(unknown)";
		}
		}

		static const char btf_str(const struct btf btf, __u32 off)
		{
		if (!off)
		@@ -231,12 +245,17 @@ static int dump_btf_type(const struct btf *btf, __u32 id,
		printf(" fwd_kind=%s", fwd_kind);
		break;
		}
		case BTF_KIND_FUNC:
		if (json_output)
		case BTF_KIND_FUNC: {
		const char *linkage = btf_func_linkage_str(t);

		if (json_output) {
		jsonw_uint_field(w, "type_id", t->type);
		else
		printf(" type_id=%u", t->type);
		jsonw_string_field(w, "linkage", linkage);
		} else {
		printf(" type_id=%u linkage=%s", t->type, linkage);
		}
		break;
		}
		case BTF_KIND_FUNC_PROTO: {
		const struct btf_param p = (const void )(t + 1);
		__u16 vlen = BTF_INFO_VLEN(t->info);