diff options
| author | Jiri Olsa <jolsa@redhat.com> | 2021-07-14 12:43:55 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-07-16 03:58:41 +0300 |
| commit | 9b99edcae5c80c8fb9f8e7149bae528c9e610a72 (patch) | |
| tree | 252a76f356e1539d453c19ed2065a3e57ed58f8f /security/landlock/ruleset.c | |
| parent | 1e37392cccdea94da635e3c6d16b21865806f619 (diff) | |
| download | linux-9b99edcae5c80c8fb9f8e7149bae528c9e610a72.tar.xz | |
bpf: Add bpf_get_func_ip helper for tracing programs
Adding bpf_get_func_ip helper for BPF_PROG_TYPE_TRACING programs,
specifically for all trampoline attach types.
The trampoline's caller IP address is stored in (ctx - 8) address.
so there's no reason to actually call the helper, but rather fixup
the call instruction and return [ctx - 8] value directly.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210714094400.396467-4-jolsa@kernel.org
Diffstat (limited to 'security/landlock/ruleset.c')
0 files changed, 0 insertions, 0 deletions