diff options
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/bpf/bpf_core_read.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/lib/bpf/bpf_core_read.h b/tools/lib/bpf/bpf_core_read.h index 5ad415f9051f..fd48b1ff59ca 100644 --- a/tools/lib/bpf/bpf_core_read.h +++ b/tools/lib/bpf/bpf_core_read.h @@ -144,6 +144,18 @@ enum bpf_enum_value_kind { __builtin_preserve_field_info(___bpf_field_ref(field), BPF_FIELD_BYTE_SIZE) /* + * Convenience macro to get field's byte offset. + * + * Supports two forms: + * - field reference through variable access: + * bpf_core_field_offset(p->my_field); + * - field reference through type and field names: + * bpf_core_field_offset(struct my_type, my_field). + */ +#define bpf_core_field_offset(field...) \ + __builtin_preserve_field_info(___bpf_field_ref(field), BPF_FIELD_BYTE_OFFSET) + +/* * Convenience macro to get BTF type ID of a specified type, using a local BTF * information. Return 32-bit unsigned integer with type ID from program's own * BTF. Always succeeds. |