Commit 3f4d4c74 authored by Martin KaFai Lau's avatar Martin KaFai Lau Committed by Alexei Starovoitov
Browse files

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: default avatarMartin KaFai Lau <kafai@fb.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent a19f89f3

tools/testing/selftests/bpf/test_btf.c

+1 −62
Original line number Diff line number Diff line
@@ -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

tools/testing/selftests/bpf/test_btf.h

0 → 100644
+69 −0
Original line number Diff line number Diff line 
/* 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 */