diff options
| author | Alexei Starovoitov <ast@fb.com> | 2017-05-30 13:31:27 -0700 |
|---|---|---|
| committer | Bruno Martins <bgcngm@gmail.com> | 2024-01-10 14:16:43 +0000 |
| commit | 29da450cb1a0e7215d3136320daa461ea28fd628 (patch) | |
| tree | 5538f200fcc5905e3a8174dbe98725d533739c9b /include/linux | |
| parent | 1d2bd276c33545f77d64219b555cfed6097102bb (diff) | |
bpf: free up BPF_JMP | BPF_CALL | BPF_X opcode
free up BPF_JMP | BPF_CALL | BPF_X opcode to be used by actual
indirect call by register and use kernel internal opcode to
mark call instruction into bpf_tail_call() helper.
Change-Id: I1a45b8e3c13848c9689ce288d4862935ede97fa7
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/filter.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/filter.h b/include/linux/filter.h index d64498da2a0c..22e9bd1cf047 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h @@ -53,6 +53,9 @@ struct bpf_prog_aux; #define BPF_REG_AX MAX_BPF_REG #define MAX_BPF_JIT_REG (MAX_BPF_REG + 1) +/* unused opcode to mark special call to bpf_tail_call() helper */ +#define BPF_TAIL_CALL 0xf0 + /* BPF program can access up to 512 bytes of stack space. */ #define MAX_BPF_STACK 512 |