On Thu, Dec 16, 2021 at 6:25 PM Pu Lehui pulehui@huawei.com wrote:
On 2021/12/16 12:06, Andrii Nakryiko wrote:
On Tue, Dec 14, 2021 at 5:54 AM Pu Lehui pulehui@huawei.com wrote:
When building bpf selftests on arm64, the following error will occur:
progs/loop2.c:20:7: error: incomplete definition of type 'struct user_pt_regs'
Some archs, like arm64 and riscv, use userspace pt_regs in bpf_tracing.h, which causes build failure when bpf prog use macro in bpf_tracing.h. So let's use vmlinux.h directly.
We could probably also extend bpf_tracing.h to work with kernel-defined pt_regs, just like we do for x86 (see __KERNEL__ and __VMLINUX_H__ checks). It's more work, but will benefit other end users, not just selftests.
It might change a lot. We can use header file directory generated by "make headers_install" to fix it.
We don't have dependency on "make headers_install" and I'd rather not add it.
What do you mean by "change a lot"?
--- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -294,7 +294,8 @@ MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian) CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG)) BPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) \ -I$(INCLUDE_DIR) -I$(CURDIR) -I$(APIDIR) \
-I$(abspath $(OUTPUT)/../usr/include)
-I$(abspath $(OUTPUT)/../usr/include) \-I../../../../usr/includeSigned-off-by: Pu Lehui pulehui@huawei.com
tools/testing/selftests/bpf/progs/loop1.c | 8 ++------ tools/testing/selftests/bpf/progs/loop2.c | 8 ++------ tools/testing/selftests/bpf/progs/loop3.c | 8 ++------ tools/testing/selftests/bpf/progs/loop6.c | 20 ++++++------------- .../selftests/bpf/progs/test_overhead.c | 8 ++------ .../selftests/bpf/progs/test_probe_user.c | 6 +----- 6 files changed, 15 insertions(+), 43 deletions(-)
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