From: Arnaldo Carvalho de Melo <[email protected]>
So, the first helper is the one shortening a variable/function section
attribute, from, for instance:
char _license[] __attribute__((section("license"), used)) = "GPL";
to:
char _license[] SEC("license") = "GPL";
Convert empty.c to that and it becomes:
# cat ~acme/lib/examples/perf/bpf/empty.c
#include <bpf.h>
char _license[] SEC("license") = "GPL";
int _version SEC("version") = LINUX_VERSION_CODE;
#
Cc: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Wang Nan <[email protected]>
Link: https://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
---
tools/perf/Makefile.perf | 1 +
tools/perf/examples/bpf/empty.c | 6 ++++--
tools/perf/include/bpf/bpf.h | 5 +++++
3 files changed, 10 insertions(+), 2 deletions(-)
create mode 100644 tools/perf/include/bpf/bpf.h
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 9343b7d945bb..c63a3971d719 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -770,6 +770,7 @@ endif
ifndef NO_LIBBPF
$(call QUIET_INSTALL, lib) \
$(INSTALL) -d -m 755
'$(DESTDIR_SQ)$(perf_include_instdir_SQ)/bpf'
+ $(INSTALL) include/bpf/*.h
'$(DESTDIR_SQ)$(perf_include_instdir_SQ)/bpf'
$(call QUIET_INSTALL, lib) \
$(INSTALL) -d -m 755
'$(DESTDIR_SQ)$(perf_examples_instdir_SQ)/bpf'
$(INSTALL) examples/bpf/*.c
'$(DESTDIR_SQ)$(perf_examples_instdir_SQ)/bpf'
diff --git a/tools/perf/examples/bpf/empty.c b/tools/perf/examples/bpf/empty.c
index 78754df53ac1..86f97763355d 100644
--- a/tools/perf/examples/bpf/empty.c
+++ b/tools/perf/examples/bpf/empty.c
@@ -1,2 +1,4 @@
-char _license[] __attribute__((section("license"), used)) = "GPL";
-int _version __attribute__((section("version"), used)) = LINUX_VERSION_CODE;
+#include <bpf.h>
+
+char _license[] SEC("license") = "GPL";
+int _version SEC("version") = LINUX_VERSION_CODE;
diff --git a/tools/perf/include/bpf/bpf.h b/tools/perf/include/bpf/bpf.h
new file mode 100644
index 000000000000..003afcab4e51
--- /dev/null
+++ b/tools/perf/include/bpf/bpf.h
@@ -0,0 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0
+#ifndef _PERF_BPF_H
+#define _PERF_BPF_H
+#define SEC(NAME) __attribute__((section(NAME), used))
+#endif /* _PERF_BPF_H */
--
2.14.3
