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| author |  Song Liu <song@kernel.org>
| 2022-02-04 10:57:39 -0800 |
|---|---|---|
| committer |  Alexei Starovoitov <ast@kernel.org>
| 2022-02-07 18:13:01 -0800 |
| commit | ebc1415d9b4f043cef5a1fb002ec316e32167e7a (patch) | |
| tree | bfa0fd9b389bc5a2718a5fafeae0ba390d74ea03 /kernel/bpf | |
| parent | x86/alternative: Introduce text_poke_copy (diff) | |
| download | linux-ebc1415d9b4f043cef5a1fb002ec316e32167e7a.tar.gz linux-ebc1415d9b4f043cef5a1fb002ec316e32167e7a.tar.bz2 linux-ebc1415d9b4f043cef5a1fb002ec316e32167e7a.zip | |
bpf: Introduce bpf_arch_text_copy
This will be used to copy JITed text to RO protected module memory. On
x86, bpf_arch_text_copy is implemented with text_poke_copy.
bpf_arch_text_copy returns pointer to dst on success, and ERR_PTR(errno)
on errors.
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220204185742.271030-7-song@kernel.org
Diffstat (limited to 'kernel/bpf')
| -rw-r--r-- | kernel/bpf/core.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c index e3fe53df0a71..a5ec480f9862 100644 --- a/kernel/bpf/core.c +++ b/kernel/bpf/core.c @@ -2440,6 +2440,11 @@ int __weak bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t, return -ENOTSUPP; } +void * __weak bpf_arch_text_copy(void *dst, void *src, size_t len) +{ + return ERR_PTR(-ENOTSUPP); +} + DEFINE_STATIC_KEY_FALSE(bpf_stats_enabled_key); EXPORT_SYMBOL(bpf_stats_enabled_key); |