[PATCH bpf-next v5 5/6] bpf, arm64: bpf trampoline for arm64

[KP Singh]

On Wed, May 18, 2022 at 3:54 PM Xu Kuohai <xukuohai at huawei.com> wrote:
>
> Add bpf trampoline support for arm64. Most of the logic is the same as
> x86.
>
> Tested on raspberry pi 4b and qemu with KASLR disabled (avoid long jump),
> result:
>  #9  /1     bpf_cookie/kprobe:OK
>  #9  /2     bpf_cookie/multi_kprobe_link_api:FAIL
>  #9  /3     bpf_cookie/multi_kprobe_attach_api:FAIL
>  #9  /4     bpf_cookie/uprobe:OK
>  #9  /5     bpf_cookie/tracepoint:OK
>  #9  /6     bpf_cookie/perf_event:OK
>  #9  /7     bpf_cookie/trampoline:OK
>  #9  /8     bpf_cookie/lsm:OK
>  #9         bpf_cookie:FAIL
>  #18 /1     bpf_tcp_ca/dctcp:OK
>  #18 /2     bpf_tcp_ca/cubic:OK
>  #18 /3     bpf_tcp_ca/invalid_license:OK
>  #18 /4     bpf_tcp_ca/dctcp_fallback:OK
>  #18 /5     bpf_tcp_ca/rel_setsockopt:OK
>  #18        bpf_tcp_ca:OK
>  #51 /1     dummy_st_ops/dummy_st_ops_attach:OK
>  #51 /2     dummy_st_ops/dummy_init_ret_value:OK
>  #51 /3     dummy_st_ops/dummy_init_ptr_arg:OK
>  #51 /4     dummy_st_ops/dummy_multiple_args:OK
>  #51        dummy_st_ops:OK
>  #55        fentry_fexit:OK
>  #56        fentry_test:OK
>  #57 /1     fexit_bpf2bpf/target_no_callees:OK
>  #57 /2     fexit_bpf2bpf/target_yes_callees:OK
>  #57 /3     fexit_bpf2bpf/func_replace:OK
>  #57 /4     fexit_bpf2bpf/func_replace_verify:OK
>  #57 /5     fexit_bpf2bpf/func_sockmap_update:OK
>  #57 /6     fexit_bpf2bpf/func_replace_return_code:OK
>  #57 /7     fexit_bpf2bpf/func_map_prog_compatibility:OK
>  #57 /8     fexit_bpf2bpf/func_replace_multi:OK
>  #57 /9     fexit_bpf2bpf/fmod_ret_freplace:OK
>  #57        fexit_bpf2bpf: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
>  #104       modify_return:OK
>  #237       xdp_bpf2bpf:OK
>
> bpf_cookie/multi_kprobe_link_api and bpf_cookie/multi_kprobe_attach_api
> failed due to lack of multi_kprobe on arm64.
>
> Signed-off-by: Xu Kuohai <xukuohai at huawei.com>
> Acked-by: Song Liu <songliubraving at fb.com>

Acked-by: KP Singh <kpsingh at kernel.org>

Thanks! This is exciting.