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authorAndrii Nakryiko <andriin@fb.com>2019-11-19 16:25:10 -0800
committerAlexei Starovoitov <ast@kernel.org>2019-11-19 16:53:22 -0800
commit24f65050276a4f82d5832e974dabfb5be5c07c39 (patch)
tree57f8eee96a6fa5541d11fea90a9ace782d8ae848 /tools
parenta0d7da26ce86a25e97ae191cb90574ada6daea98 (diff)
downloadlinux-24f65050276a4f82d5832e974dabfb5be5c07c39.tar.bz2
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
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/bpf/Makefile7
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))