diff options
| author |   Andrii Nakryiko <andriin@fb.com> | 2020-06-19 16:17:00 -0700 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2020-06-22 17:01:48 -0700 |
| commit | 05aca6da3b5ab3c5c6003dbbefc9580d9a6a308b (patch) | |
| tree | d4c33d240200463799c48fc111c9e76386710461 /tools/build | |
| parent | tools/bpftool: Minimize bootstrap bpftool (diff) | |
| download | linux-dev-05aca6da3b5ab3c5c6003dbbefc9580d9a6a308b.tar.xz linux-dev-05aca6da3b5ab3c5c6003dbbefc9580d9a6a308b.zip | |
tools/bpftool: Generalize BPF skeleton support and generate vmlinux.h
Adapt Makefile to support BPF skeleton generation beyond single profiler.bpf.c
case. Also add vmlinux.h generation and switch profiler.bpf.c to use it.
clang-bpf-global-var feature is extended and renamed to clang-bpf-co-re to
check for support of preserve_access_index attribute, which, together with BTF
for global variables, is the minimum requirement for modern BPF programs.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/bpf/20200619231703.738941-7-andriin@fb.com
Diffstat (limited to 'tools/build')
| -rw-r--r-- | tools/build/feature/Makefile | 4 | ||||
| -rw-r--r-- | tools/build/feature/test-clang-bpf-co-re.c | 9 | ||||
| -rw-r--r-- | tools/build/feature/test-clang-bpf-global-var.c | 4 |
3 files changed, 11 insertions, 6 deletions
diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile index b1f0321180f5..88371f7f0369 100644 --- a/tools/build/feature/Makefile +++ b/tools/build/feature/Makefile @@ -68,7 +68,7 @@ FILES= \ test-llvm-version.bin \ test-libaio.bin \ test-libzstd.bin \ - test-clang-bpf-global-var.bin \ + test-clang-bpf-co-re.bin \ test-file-handle.bin \ test-libpfm4.bin @@ -325,7 +325,7 @@ $(OUTPUT)test-libaio.bin: $(OUTPUT)test-libzstd.bin: $(BUILD) -lzstd -$(OUTPUT)test-clang-bpf-global-var.bin: +$(OUTPUT)test-clang-bpf-co-re.bin: $(CLANG) -S -g -target bpf -o - $(patsubst %.bin,%.c,$(@F)) | \ grep BTF_KIND_VAR diff --git a/tools/build/feature/test-clang-bpf-co-re.c b/tools/build/feature/test-clang-bpf-co-re.c new file mode 100644 index 000000000000..cb5265bfdd83 --- /dev/null +++ b/tools/build/feature/test-clang-bpf-co-re.c @@ -0,0 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2020 Facebook + +struct test { + int a; + int b; +} __attribute__((preserve_access_index)); + +volatile struct test global_value_for_test = {}; diff --git a/tools/build/feature/test-clang-bpf-global-var.c b/tools/build/feature/test-clang-bpf-global-var.c deleted file mode 100644 index 221f1481d52e..000000000000 --- a/tools/build/feature/test-clang-bpf-global-var.c +++ /dev/null @@ -1,4 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -// Copyright (c) 2020 Facebook - -volatile int global_value_for_test = 1; |