diff options
| author |   Alexei Starovoitov <ast@kernel.org> | 2019-11-14 10:57:03 -0800 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2019-11-15 23:41:28 +0100 |
| commit | 5964b2000f283ff5df366f718e0f083ebbaae977 (patch) | |
| tree | 1c9340853eb72ac070354a5f1291a976ba66911d /include | |
| parent | bpf: Refactor x86 JIT into helpers (diff) | |
| download | linux-dev-5964b2000f283ff5df366f718e0f083ebbaae977.tar.xz linux-dev-5964b2000f283ff5df366f718e0f083ebbaae977.zip | |
bpf: Add bpf_arch_text_poke() helper
Add bpf_arch_text_poke() helper that is used by BPF trampoline logic to patch
nops/calls in kernel text into calls into BPF trampoline and to patch
calls/nops inside BPF programs too.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20191114185720.1641606-4-ast@kernel.org
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/bpf.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index 7c7f518811a6..8b90db25348a 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -1157,4 +1157,12 @@ static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, } #endif /* CONFIG_INET */ +enum bpf_text_poke_type { + BPF_MOD_NOP_TO_CALL, + BPF_MOD_CALL_TO_CALL, + BPF_MOD_CALL_TO_NOP, +}; +int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t, + void *addr1, void *addr2); + #endif /* _LINUX_BPF_H */ |