From 6ebaa3fb88bbe4c33a0e01ce27007e1dd4fd133c Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Wed, 6 Mar 2024 12:45:26 +0200 Subject: 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 Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20240306104529.6453-13-eddyz87@gmail.com --- tools/lib/bpf/libbpf_internal.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'tools/lib/bpf/libbpf_internal.h') 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, }; -- cgit v1.2.3