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@xxxxxx> Signed-off-by: Andrii Nakryiko <andriin@xxxxxx> --- tools/testing/selftests/bpf/Makefile | 7 +++++++ 1 file changed, 7 insertions(+) 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)) -- 2.17.1
