1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2
3 #ifndef _LINUX_BTF_IDS_H
4 #define _LINUX_BTF_IDS_H
5
6 #include <linux/types.h> /* for u32 */
7
8 struct btf_id_set {
9 u32 cnt;
10 u32 ids[];
11 };
12
13 struct btf_id_set8 {
14 u32 cnt;
15 u32 flags;
16 struct {
17 u32 id;
18 u32 flags;
19 } pairs[];
20 };
21
22 #ifdef CONFIG_DEBUG_INFO_BTF
23
24 #include <linux/compiler.h> /* for __PASTE */
25
26 /*
27 * Following macros help to define lists of BT
28 * in .BTF_ids section. They are initially fil
29 * (during compilation) and resolved later dur
30 * linking phase by resolve_btfids tool.
31 *
32 * Any change in list layout must be reflected
33 * tool logic.
34 */
35
36 #define BTF_IDS_SECTION ".BTF_ids"
37
38 #define ____BTF_ID(symbol)
39 asm(
40 ".pushsection " BTF_IDS_SECTION ",\"a\";
41 ".local " #symbol " ;
42 ".type " #symbol ", STT_OBJECT;
43 ".size " #symbol ", 4;
44 #symbol ":
45 ".zero 4
46 ".popsection;
47
48 #define __BTF_ID(symbol) \
49 ____BTF_ID(symbol)
50
51 #define __ID(prefix) \
52 __PASTE(__PASTE(prefix, __COUNTER__),
53
54 /*
55 * The BTF_ID defines unique symbol for each I
56 * to 4 zero bytes.
57 */
58 #define BTF_ID(prefix, name) \
59 __BTF_ID(__ID(__BTF_ID__##prefix##__##
60
61 /*
62 * The BTF_ID_LIST macro defines pure (unsorte
63 * of BTF IDs, with following layout:
64 *
65 * BTF_ID_LIST(list1)
66 * BTF_ID(type1, name1)
67 * BTF_ID(type2, name2)
68 *
69 * list1:
70 * __BTF_ID__type1__name1__1:
71 * .zero 4
72 * __BTF_ID__type2__name2__2:
73 * .zero 4
74 *
75 */
76 #define __BTF_ID_LIST(name, scope)
77 asm(
78 ".pushsection " BTF_IDS_SECTION ",\"a\";
79 "." #scope " " #name ";
80 #name ":;
81 ".popsection;
82
83 #define BTF_ID_LIST(name)
84 __BTF_ID_LIST(name, local)
85 extern u32 name[];
86
87 #define BTF_ID_LIST_GLOBAL(name, n)
88 __BTF_ID_LIST(name, globl)
89
90 /* The BTF_ID_LIST_SINGLE macro defines a BTF_
91 * a single entry.
92 */
93 #define BTF_ID_LIST_SINGLE(name, prefix, typen
94 BTF_ID_LIST(name) \
95 BTF_ID(prefix, typename)
96 #define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix
97 BTF_ID_LIST_GLOBAL(name, 1)
98 BTF_ID(prefix, typename)
99
100 /*
101 * The BTF_ID_UNUSED macro defines 4 zero byte
102 * It's used when we want to define 'unused' e
103 * in BTF_ID_LIST, like:
104 *
105 * BTF_ID_LIST(bpf_skb_output_btf_ids)
106 * BTF_ID(struct, sk_buff)
107 * BTF_ID_UNUSED
108 * BTF_ID(struct, task_struct)
109 */
110
111 #define BTF_ID_UNUSED
112 asm(
113 ".pushsection " BTF_IDS_SECTION ",\"a\";
114 ".zero 4
115 ".popsection;
116
117 /*
118 * The BTF_SET_START/END macros pair defines s
119 * BTF IDs plus its members count, with follow
120 *
121 * BTF_SET_START(list)
122 * BTF_ID(type1, name1)
123 * BTF_ID(type2, name2)
124 * BTF_SET_END(list)
125 *
126 * __BTF_ID__set__list:
127 * .zero 4
128 * list:
129 * __BTF_ID__type1__name1__3:
130 * .zero 4
131 * __BTF_ID__type2__name2__4:
132 * .zero 4
133 *
134 */
135 #define __BTF_SET_START(name, scope)
136 asm(
137 ".pushsection " BTF_IDS_SECTION ",\"a\";
138 "." #scope " __BTF_ID__set__" #name ";
139 "__BTF_ID__set__" #name ":;
140 ".zero 4
141 ".popsection;
142
143 #define BTF_SET_START(name)
144 __BTF_ID_LIST(name, local)
145 __BTF_SET_START(name, local)
146
147 #define BTF_SET_START_GLOBAL(name)
148 __BTF_ID_LIST(name, globl)
149 __BTF_SET_START(name, globl)
150
151 #define BTF_SET_END(name)
152 asm(
153 ".pushsection " BTF_IDS_SECTION ",\"a\";
154 ".size __BTF_ID__set__" #name ", .-" #name "
155 ".popsection;
156 extern struct btf_id_set name;
157
158 #else
159
160 #define BTF_ID_LIST(name) static u32 __maybe_u
161 #define BTF_ID(prefix, name)
162 #define BTF_ID_UNUSED
163 #define BTF_ID_LIST_GLOBAL(name, n) u32 __mayb
164 #define BTF_ID_LIST_SINGLE(name, prefix, typen
165 #define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix
166 #define BTF_SET_START(name) static struct btf_
167 #define BTF_SET_START_GLOBAL(name) static stru
168 #define BTF_SET_END(name)
169
170 #endif /* CONFIG_DEBUG_INFO_BTF */
171
172 #ifdef CONFIG_NET
173 /* Define a list of socket types which can be
174 * skc_to_*_sock() helpers. All these sockets
175 * sock_common as the first argument in its me
176 */
177 #define BTF_SOCK_TYPE_xxx \
178 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET, inet
179 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_CONN,
180 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_REQ,
181 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_TW, i
182 BTF_SOCK_TYPE(BTF_SOCK_TYPE_REQ, reque
183 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK, sock
184 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK_COMMO
185 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP, tcp_s
186 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_REQ, t
187 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_TW, tc
188 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP6, tcp6
189 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP, udp_s
190 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP6, udp6
191 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UNIX, unix
192 BTF_SOCK_TYPE(BTF_SOCK_TYPE_MPTCP, mpt
193 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCKET, so
194
195 enum {
196 #define BTF_SOCK_TYPE(name, str) name,
197 BTF_SOCK_TYPE_xxx
198 #undef BTF_SOCK_TYPE
199 MAX_BTF_SOCK_TYPE,
200 };
201
202 extern u32 btf_sock_ids[];
203 #endif
204
205 #define BTF_TRACING_TYPE_xxx \
206 BTF_TRACING_TYPE(BTF_TRACING_TYPE_TASK
207 BTF_TRACING_TYPE(BTF_TRACING_TYPE_FILE
208 BTF_TRACING_TYPE(BTF_TRACING_TYPE_VMA,
209
210 enum {
211 #define BTF_TRACING_TYPE(name, type) name,
212 BTF_TRACING_TYPE_xxx
213 #undef BTF_TRACING_TYPE
214 MAX_BTF_TRACING_TYPE,
215 };
216
217 extern u32 btf_tracing_ids[];
218
219 #endif
220
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