diff options
| author | Alexei Starovoitov <ast@kernel.org> | 2019-10-15 20:25:02 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2019-10-17 16:44:36 +0200 |
| commit | 2a02759ef5f8a34792df22b41d5e10658fd7bbd3 (patch) | |
| tree | ebe2c706325515484c567ade7f16e2bee61335c2 /include/linux | |
| parent | ac4414b5ca47d16c8de3134cc1b868056c4a68ea (diff) | |
bpf: Add support for BTF pointers to interpreter
Pointer to BTF object is a pointer to kernel object or NULL.
The memory access in the interpreter has to be done via probe_kernel_read
to avoid page faults.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20191016032505.2089704-9-ast@kernel.org
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 d3d51d7aff2c..22ebea2e64ea 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h @@ -65,6 +65,9 @@ struct ctl_table_header; /* unused opcode to mark special call to bpf_tail_call() helper */ #define BPF_TAIL_CALL 0xf0 +/* unused opcode to mark special load instruction. Same as BPF_ABS */ +#define BPF_PROBE_MEM 0x20 + /* unused opcode to mark call to interpreter with arguments */ #define BPF_CALL_ARGS 0xe0 |