netdev - [PATCH bpf-next v2 2/5] tools/bpf: sync btf

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Date:   Mon, 20 Jul 2020 09:33:59 -0700
From:   Yonghong Song <yhs@...com>
To:     <bpf@...r.kernel.org>, <netdev@...r.kernel.org>
CC:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jiri Olsa <jolsa@...nel.org>, <kernel-team@...com>
Subject: [PATCH bpf-next v2 2/5] tools/bpf: sync btf_ids.h to tools

Sync kernel header btf_ids.h to tools directory.
Also define macro CONFIG_DEBUG_INFO_BTF before
including btf_ids.h in prog_tests/resolve_btfids.c
since non-stub definitions for BTF_ID_LIST etc. macros
are defined under CONFIG_DEBUG_INFO_BTF. This
prevented test_progs from failing.

Signed-off-by: Yonghong Song <yhs@...com>
---
 tools/include/linux/btf_ids.h                         | 11 ++++++++++-
 .../testing/selftests/bpf/prog_tests/resolve_btfids.c |  1 +
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/tools/include/linux/btf_ids.h b/tools/include/linux/btf_ids.h
index fe019774f8a7..1cdb56950ffe 100644
--- a/tools/include/linux/btf_ids.h
+++ b/tools/include/linux/btf_ids.h
@@ -3,6 +3,8 @@
 #ifndef _LINUX_BTF_IDS_H
 #define _LINUX_BTF_IDS_H
 
+#ifdef CONFIG_DEBUG_INFO_BTF
+
 #include <linux/compiler.h> /* for __PASTE */
 
 /*
@@ -21,7 +23,7 @@
 asm(							\
 ".pushsection " BTF_IDS_SECTION ",\"a\";       \n"	\
 ".local " #symbol " ;                          \n"	\
-".type  " #symbol ", @object;                  \n"	\
+".type  " #symbol ", STT_OBJECT;               \n"	\
 ".size  " #symbol ", 4;                        \n"	\
 #symbol ":                                     \n"	\
 ".zero 4                                       \n"	\
@@ -83,5 +85,12 @@ asm(							\
 ".zero 4                                       \n"	\
 ".popsection;                                  \n");
 
+#else
+
+#define BTF_ID_LIST(name) static u32 name[5];
+#define BTF_ID(prefix, name)
+#define BTF_ID_UNUSED
+
+#endif /* CONFIG_DEBUG_INFO_BTF */
 
 #endif
diff --git a/tools/testing/selftests/bpf/prog_tests/resolve_btfids.c b/tools/testing/selftests/bpf/prog_tests/resolve_btfids.c
index 403be6f36cba..22d83bba4e91 100644
--- a/tools/testing/selftests/bpf/prog_tests/resolve_btfids.c
+++ b/tools/testing/selftests/bpf/prog_tests/resolve_btfids.c
@@ -6,6 +6,7 @@
 #include <bpf/libbpf.h>
 #include <linux/btf.h>
 #include <linux/kernel.h>
+#define CONFIG_DEBUG_INFO_BTF
 #include <linux/btf_ids.h>
 #include "test_progs.h"
 
-- 
2.24.1