diff options
| author | Jiri Olsa | 2021-07-14 11:43:54 +0200 |
|---|---|---|
| committer | Alexei Starovoitov | 2021-07-15 17:16:06 -0700 |
| commit | 1e37392cccdea94da635e3c6d16b21865806f619 (patch) | |
| tree | 1aae46e49ea79ade58734a32fbb1e9a2386ccbd9 /include/linux | |
| parent | 7e6f3cd89f04a0a577002d5696288b482109d25c (diff) | |
bpf: Enable BPF_TRAMP_F_IP_ARG for trampolines with call_get_func_ip
Enabling BPF_TRAMP_F_IP_ARG for trampolines that actually need it.
The BPF_TRAMP_F_IP_ARG adds extra 3 instructions to trampoline code
and is used only by programs with bpf_get_func_ip helper, which is
added in following patch and sets call_get_func_ip bit.
This patch ensures that BPF_TRAMP_F_IP_ARG flag is used only for
trampolines that have programs with call_get_func_ip set.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210714094400.396467-3-jolsa@kernel.org
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/filter.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/filter.h b/include/linux/filter.h index 472f97074da0..ba36989f711a 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h @@ -559,7 +559,8 @@ struct bpf_prog { kprobe_override:1, /* Do we override a kprobe? */ has_callchain_buf:1, /* callchain buffer allocated? */ enforce_expected_attach_type:1, /* Enforce expected_attach_type checking at attach time */ - call_get_stack:1; /* Do we call bpf_get_stack() or bpf_get_stackid() */ + call_get_stack:1, /* Do we call bpf_get_stack() or bpf_get_stackid() */ + call_get_func_ip:1; /* Do we call get_func_ip() */ enum bpf_prog_type type; /* Type of BPF program */ enum bpf_attach_type expected_attach_type; /* For some prog types */ u32 len; /* Number of filter blocks */ |