On Thu, Sep 02, 2021 at 11:09:26AM +0200, Jean-Philippe Brucker wrote:
> struct pt_regs is not exported to userspace on all archs. arm64 and s390
> export "user_pt_regs" instead, which causes build failure at the moment:
>
> progs/test_task_pt_regs.c:8:16: error: variable has incomplete type 'struct pt_regs'
> struct pt_regs current_regs = {};
>
> Use the multi-arch macros defined by tools/lib/bpf/bpf_tracing.h to copy
> the pt_regs into a locally-defined struct.
>
> Copying the user_pt_regs struct on arm64 wouldn't work because the
> struct is too large and the compiler complains about using too much
> stack.
>
> Fixes: 576d47bb1a92 ("bpf: selftests: Add bpf_task_pt_regs() selftest")
> Signed-off-by: Jean-Philippe Brucker <jean-philippe@xxxxxxxxxx>
> ---
> .../selftests/bpf/bpf_pt_regs_helpers.h | 30 +++++++++++++++++++
> .../selftests/bpf/prog_tests/task_pt_regs.c | 1 +
> .../selftests/bpf/progs/test_task_pt_regs.c | 10 ++++---
> 3 files changed, 37 insertions(+), 4 deletions(-)
> create mode 100644 tools/testing/selftests/bpf/bpf_pt_regs_helpers.h
Acked-by: Daniel Xu <dxu@xxxxxxxxx>
[...]
