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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>
This commit is contained in:
Martin KaFai Lau 2019-04-26 16:39:46 -07:00 committed by Alexei Starovoitov
parent a19f89f366
commit 3f4d4c7410
2 changed files with 70 additions and 62 deletions
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63
tools/testing/selftests/bpf/test_btf.c
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@ -24,6 +24,7 @@
#include "bpf_rlimit.h"
#include "bpf_util.h"
#include "test_btf.h"
#define MAX_INSNS 512
#define MAX_SUBPROGS 16
@ -58,68 +59,6 @@ static int __base_pr(enum libbpf_print_level level __attribute__((unused)),
return vfprintf(stderr, format, args);
}
#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)
#define BTF_END_RAW 0xdeadbeef
#define NAME_TBD 0xdeadb33f

69
tools/testing/selftests/bpf/test_btf.h Normal file
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@ -0,0 +1,69 @@
/* 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 */