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| 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 /kernel | |
| 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 'kernel')
| -rw-r--r-- | kernel/bpf/core.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c index 99693f3c4e99..434a0d920153 100644 --- a/kernel/bpf/core.c +++ b/kernel/bpf/core.c @@ -2144,6 +2144,12 @@ int __weak skb_copy_bits(const struct sk_buff *skb, int offset, void *to, return -EFAULT; } +int __weak bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t, + void *addr1, void *addr2) +{ + return -ENOTSUPP; +} + DEFINE_STATIC_KEY_FALSE(bpf_stats_enabled_key); EXPORT_SYMBOL(bpf_stats_enabled_key); |