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| author | Andrii Nakryiko <andriin@fb.com> | 2019-11-20 03:25:10 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2019-11-20 03:53:22 +0300 |
| commit | 24f65050276a4f82d5832e974dabfb5be5c07c39 (patch) | |
| tree | 57f8eee96a6fa5541d11fea90a9ace782d8ae848 | |
| parent | a0d7da26ce86a25e97ae191cb90574ada6daea98 (diff) | |
| download | linux-24f65050276a4f82d5832e974dabfb5be5c07c39.tar.xz | |
selftests/bpf: Enforce no-ALU32 for test_progs-no_alu32
With the most recent Clang, alu32 is enabled by default if -mcpu=probe or
-mcpu=v3 is specified. Use a separate build rule with -mcpu=v2 to enforce no
ALU32 mode.
Suggested-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20191120002510.4130605-1-andriin@fb.com
| -rw-r--r-- | tools/testing/selftests/bpf/Makefile | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index d4400fbe6634..4fe4aec0367c 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -163,6 +163,12 @@ define CLANG_BPF_BUILD_RULE -c $1 -o - || echo "BPF obj compilation failed") | \ $(LLC) -march=bpf -mcpu=probe $4 -filetype=obj -o $2 endef +# Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32 +define CLANG_NOALU32_BPF_BUILD_RULE + ($(CLANG) $3 -O2 -target bpf -emit-llvm \ + -c $1 -o - || echo "BPF obj compilation failed") | \ + $(LLC) -march=bpf -mcpu=v2 $4 -filetype=obj -o $2 +endef # Similar to CLANG_BPF_BUILD_RULE, but using native Clang and bpf LLC define CLANG_NATIVE_BPF_BUILD_RULE ($(CLANG) $3 -O2 -emit-llvm \ @@ -275,6 +281,7 @@ TRUNNER_BPF_LDFLAGS := -mattr=+alu32 $(eval $(call DEFINE_TEST_RUNNER,test_progs)) # Define test_progs-no_alu32 test runner. +TRUNNER_BPF_BUILD_RULE := CLANG_NOALU32_BPF_BUILD_RULE TRUNNER_BPF_LDFLAGS := $(eval $(call DEFINE_TEST_RUNNER,test_progs,no_alu32)) |