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perf bpf: Add bpf.h to be used in eBPF proggies
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 <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-zmeg52dlvy51rdlhyumfl5yf@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -770,6 +770,7 @@ endif
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ifndef NO_LIBBPF
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$(call QUIET_INSTALL, lib) \
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$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perf_include_instdir_SQ)/bpf'
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$(INSTALL) include/bpf/*.h '$(DESTDIR_SQ)$(perf_include_instdir_SQ)/bpf'
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$(call QUIET_INSTALL, lib) \
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$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perf_examples_instdir_SQ)/bpf'
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$(INSTALL) examples/bpf/*.c '$(DESTDIR_SQ)$(perf_examples_instdir_SQ)/bpf'
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@ -1,2 +1,4 @@
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char _license[] __attribute__((section("license"), used)) = "GPL";
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int _version __attribute__((section("version"), used)) = LINUX_VERSION_CODE;
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#include <bpf.h>
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char _license[] SEC("license") = "GPL";
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int _version SEC("version") = LINUX_VERSION_CODE;
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5
tools/perf/include/bpf/bpf.h
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5
tools/perf/include/bpf/bpf.h
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@ -0,0 +1,5 @@
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// SPDX-License-Identifier: GPL-2.0
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#ifndef _PERF_BPF_H
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#define _PERF_BPF_H
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#define SEC(NAME) __attribute__((section(NAME), used))
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#endif /* _PERF_BPF_H */
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