On 4/16/2022 9:57 AM, Xu Kuohai wrote: > On 4/16/2022 1:12 AM, Andrii Nakryiko wrote: >> On Thu, Apr 14, 2022 at 9:10 AM Xu Kuohai <xukuohai@xxxxxxxxxx> wrote: >>> >>> Add bpf trampoline support for arm64. Most of the logic is the same as >>> x86. >>> >>> fentry before bpf trampoline hooked: >>> mov x9, x30 >>> nop >>> >>> fentry after bpf trampoline hooked: >>> mov x9, x30 >>> bl <bpf_trampoline> >>> >>> Tested on qemu, result: >>> #55 fentry_fexit:OK >>> #56 fentry_test:OK >>> #58 fexit_sleep:OK >>> #59 fexit_stress:OK >>> #60 fexit_test:OK >>> #67 get_func_args_test:OK >>> #68 get_func_ip_test:OK >>> #101 modify_return:OK >>> >>> Signed-off-by: Xu Kuohai <xukuohai@xxxxxxxxxx> >>> Acked-by: Song Liu <songliubraving@xxxxxx> >>> --- >> >> Can you please also take a look at [0], which is an ongoing work to >> add support for BPF cookie to BPF trampoline-based BPF programs. It's >> very close to being done, so it would be good if you can implement >> that at the same time. > > OK, I'll take a look and try to implemnt it. already implemented, but there are some conflicts between these two series, will send v3 after trampoline cookie are merged.
