diff options
| author | Song Liu | 2022-02-04 10:57:39 -0800 |
|---|---|---|
| committer | Alexei Starovoitov | 2022-02-07 18:13:01 -0800 |
| commit | ebc1415d9b4f043cef5a1fb002ec316e32167e7a (patch) | |
| tree | bfa0fd9b389bc5a2718a5fafeae0ba390d74ea03 /arch | |
| parent | 0e06b40371682b6b70ed0302a7baec0698ada95c (diff) | |
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 'arch')
| -rw-r--r-- | arch/x86/net/bpf_jit_comp.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c index 36f6fc3e6e69..c13d148f7396 100644 --- a/arch/x86/net/bpf_jit_comp.c +++ b/arch/x86/net/bpf_jit_comp.c @@ -2412,3 +2412,10 @@ bool bpf_jit_supports_kfunc_call(void) { return true; } + +void *bpf_arch_text_copy(void *dst, void *src, size_t len) +{ + if (text_poke_copy(dst, src, len) == NULL) + return ERR_PTR(-EINVAL); + return dst; +} |