diff options
| author | Florent Revest <revest@chromium.org> | 2023-05-11 16:05:07 +0200 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2023-05-15 21:17:22 +0200 |
| commit | 90564f1e3dd66052af29e2c29cba3dc98b6604d0 (patch) | |
| tree | 1c952f79198d21afeda507ad774cf76a4e647a40 /tools | |
| parent | 04cb8453a91c7c22f60ddadb6cef0d19abb33bb5 (diff) | |
bpf, arm64: Support struct arguments in the BPF trampoline
This extends the BPF trampoline JIT to support attachment to functions
that take small structures (up to 128bit) as argument. This is trivially
achieved by saving/restoring a number of "argument registers" rather
than a number of arguments.
The AAPCS64 section 6.8.2 describes the parameter passing ABI.
"Composite types" (like C structs) below 16 bytes (as enforced by the
BPF verifier) are provided as part of the 8 argument registers as
explained in the section C.12.
Signed-off-by: Florent Revest <revest@chromium.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Acked-by: Xu Kuohai <xukuohai@huawei.com>
Link: https://lore.kernel.org/bpf/20230511140507.514888-1-revest@chromium.org
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/bpf/DENYLIST.aarch64 | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/DENYLIST.aarch64 b/tools/testing/selftests/bpf/DENYLIST.aarch64 index cd42e2825bd2..08adc805878b 100644 --- a/tools/testing/selftests/bpf/DENYLIST.aarch64 +++ b/tools/testing/selftests/bpf/DENYLIST.aarch64 @@ -10,4 +10,3 @@ kprobe_multi_test/link_api_addrs # link_fd unexpected link_fd: a kprobe_multi_test/link_api_syms # link_fd unexpected link_fd: actual -95 < expected 0 kprobe_multi_test/skel_api # libbpf: failed to load BPF skeleton 'kprobe_multi': -3 module_attach # prog 'kprobe_multi': failed to auto-attach: -95 -tracing_struct # tracing_struct__attach unexpected error: -524 (errno 524) |