linux-stable/tools/testing/selftests/bpf/test_btf.h
Martin KaFai Lau 3f4d4c7410 bpf: Refactor BTF encoding macro to test_btf.h
Refactor common BTF encoding macros for other tests to use.
The libbpf may reuse some of them in the future  which requires
some more thoughts before publishing as a libbpf API.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-04-27 09:07:05 -07:00

69 lines
2.3 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2019 Facebook */
#ifndef _TEST_BTF_H
#define _TEST_BTF_H
#define BTF_INFO_ENC(kind, kind_flag, vlen) \
((!!(kind_flag) << 31) | ((kind) << 24) | ((vlen) & BTF_MAX_VLEN))
#define BTF_TYPE_ENC(name, info, size_or_type) \
(name), (info), (size_or_type)
#define BTF_INT_ENC(encoding, bits_offset, nr_bits) \
((encoding) << 24 | (bits_offset) << 16 | (nr_bits))
#define BTF_TYPE_INT_ENC(name, encoding, bits_offset, bits, sz) \
BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_INT, 0, 0), sz), \
BTF_INT_ENC(encoding, bits_offset, bits)
#define BTF_FWD_ENC(name, kind_flag) \
BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_FWD, kind_flag, 0), 0)
#define BTF_ARRAY_ENC(type, index_type, nr_elems) \
(type), (index_type), (nr_elems)
#define BTF_TYPE_ARRAY_ENC(type, index_type, nr_elems) \
BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_ARRAY, 0, 0), 0), \
BTF_ARRAY_ENC(type, index_type, nr_elems)
#define BTF_STRUCT_ENC(name, nr_elems, sz) \
BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, nr_elems), sz)
#define BTF_UNION_ENC(name, nr_elems, sz) \
BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_UNION, 0, nr_elems), sz)
#define BTF_VAR_ENC(name, type, linkage) \
BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_VAR, 0, 0), type), (linkage)
#define BTF_VAR_SECINFO_ENC(type, offset, size) \
(type), (offset), (size)
#define BTF_MEMBER_ENC(name, type, bits_offset) \
(name), (type), (bits_offset)
#define BTF_ENUM_ENC(name, val) (name), (val)
#define BTF_MEMBER_OFFSET(bitfield_size, bits_offset) \
((bitfield_size) << 24 | (bits_offset))
#define BTF_TYPEDEF_ENC(name, type) \
BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_TYPEDEF, 0, 0), type)
#define BTF_PTR_ENC(type) \
BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), type)
#define BTF_CONST_ENC(type) \
BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), type)
#define BTF_VOLATILE_ENC(type) \
BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_VOLATILE, 0, 0), type)
#define BTF_RESTRICT_ENC(type) \
BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_RESTRICT, 0, 0), type)
#define BTF_FUNC_PROTO_ENC(ret_type, nargs) \
BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_FUNC_PROTO, 0, nargs), ret_type)
#define BTF_FUNC_PROTO_ARG_ENC(name, type) \
(name), (type)
#define BTF_FUNC_ENC(name, func_proto) \
BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_FUNC, 0, 0), func_proto)
#endif /* _TEST_BTF_H */