1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 2
3 #ifndef _LINUX_BTF_IDS_H 3 #ifndef _LINUX_BTF_IDS_H
4 #define _LINUX_BTF_IDS_H 4 #define _LINUX_BTF_IDS_H
5 5
6 #include <linux/types.h> /* for u32 */ 6 #include <linux/types.h> /* for u32 */
7 7
8 struct btf_id_set { 8 struct btf_id_set {
9 u32 cnt; 9 u32 cnt;
10 u32 ids[]; 10 u32 ids[];
11 }; 11 };
12 12
13 struct btf_id_set8 { 13 struct btf_id_set8 {
14 u32 cnt; 14 u32 cnt;
15 u32 flags; 15 u32 flags;
16 struct { 16 struct {
17 u32 id; 17 u32 id;
18 u32 flags; 18 u32 flags;
19 } pairs[]; 19 } pairs[];
20 }; 20 };
21 21
22 #ifdef CONFIG_DEBUG_INFO_BTF 22 #ifdef CONFIG_DEBUG_INFO_BTF
23 23
24 #include <linux/compiler.h> /* for __PASTE */ 24 #include <linux/compiler.h> /* for __PASTE */
25 25
26 /* 26 /*
27 * Following macros help to define lists of BT 27 * Following macros help to define lists of BTF IDs placed
28 * in .BTF_ids section. They are initially fil 28 * in .BTF_ids section. They are initially filled with zeros
29 * (during compilation) and resolved later dur 29 * (during compilation) and resolved later during the
30 * linking phase by resolve_btfids tool. 30 * linking phase by resolve_btfids tool.
31 * 31 *
32 * Any change in list layout must be reflected 32 * Any change in list layout must be reflected in resolve_btfids
33 * tool logic. 33 * tool logic.
34 */ 34 */
35 35
36 #define BTF_IDS_SECTION ".BTF_ids" 36 #define BTF_IDS_SECTION ".BTF_ids"
37 37
38 #define ____BTF_ID(symbol) 38 #define ____BTF_ID(symbol) \
39 asm( 39 asm( \
40 ".pushsection " BTF_IDS_SECTION ",\"a\"; 40 ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \
41 ".local " #symbol " ; 41 ".local " #symbol " ; \n" \
42 ".type " #symbol ", STT_OBJECT; 42 ".type " #symbol ", STT_OBJECT; \n" \
43 ".size " #symbol ", 4; 43 ".size " #symbol ", 4; \n" \
44 #symbol ": 44 #symbol ": \n" \
45 ".zero 4 45 ".zero 4 \n" \
46 ".popsection; 46 ".popsection; \n");
47 47
48 #define __BTF_ID(symbol) \ 48 #define __BTF_ID(symbol) \
49 ____BTF_ID(symbol) 49 ____BTF_ID(symbol)
50 50
51 #define __ID(prefix) \ 51 #define __ID(prefix) \
52 __PASTE(__PASTE(prefix, __COUNTER__), 52 __PASTE(__PASTE(prefix, __COUNTER__), __LINE__)
53 53
54 /* 54 /*
55 * The BTF_ID defines unique symbol for each I 55 * The BTF_ID defines unique symbol for each ID pointing
56 * to 4 zero bytes. 56 * to 4 zero bytes.
57 */ 57 */
58 #define BTF_ID(prefix, name) \ 58 #define BTF_ID(prefix, name) \
59 __BTF_ID(__ID(__BTF_ID__##prefix##__## 59 __BTF_ID(__ID(__BTF_ID__##prefix##__##name##__))
60 60
61 /* 61 /*
62 * The BTF_ID_LIST macro defines pure (unsorte 62 * The BTF_ID_LIST macro defines pure (unsorted) list
63 * of BTF IDs, with following layout: 63 * of BTF IDs, with following layout:
64 * 64 *
65 * BTF_ID_LIST(list1) 65 * BTF_ID_LIST(list1)
66 * BTF_ID(type1, name1) 66 * BTF_ID(type1, name1)
67 * BTF_ID(type2, name2) 67 * BTF_ID(type2, name2)
68 * 68 *
69 * list1: 69 * list1:
70 * __BTF_ID__type1__name1__1: 70 * __BTF_ID__type1__name1__1:
71 * .zero 4 71 * .zero 4
72 * __BTF_ID__type2__name2__2: 72 * __BTF_ID__type2__name2__2:
73 * .zero 4 73 * .zero 4
74 * 74 *
75 */ 75 */
76 #define __BTF_ID_LIST(name, scope) 76 #define __BTF_ID_LIST(name, scope) \
77 asm( 77 asm( \
78 ".pushsection " BTF_IDS_SECTION ",\"a\"; 78 ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \
79 "." #scope " " #name "; 79 "." #scope " " #name "; \n" \
80 #name ":; 80 #name ":; \n" \
81 ".popsection; 81 ".popsection; \n");
82 82
83 #define BTF_ID_LIST(name) 83 #define BTF_ID_LIST(name) \
84 __BTF_ID_LIST(name, local) 84 __BTF_ID_LIST(name, local) \
85 extern u32 name[]; 85 extern u32 name[];
86 86
87 #define BTF_ID_LIST_GLOBAL(name, n) 87 #define BTF_ID_LIST_GLOBAL(name, n) \
88 __BTF_ID_LIST(name, globl) 88 __BTF_ID_LIST(name, globl)
89 89
90 /* The BTF_ID_LIST_SINGLE macro defines a BTF_ 90 /* The BTF_ID_LIST_SINGLE macro defines a BTF_ID_LIST with
91 * a single entry. 91 * a single entry.
92 */ 92 */
93 #define BTF_ID_LIST_SINGLE(name, prefix, typen 93 #define BTF_ID_LIST_SINGLE(name, prefix, typename) \
94 BTF_ID_LIST(name) \ 94 BTF_ID_LIST(name) \
95 BTF_ID(prefix, typename) 95 BTF_ID(prefix, typename)
96 #define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix 96 #define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix, typename) \
97 BTF_ID_LIST_GLOBAL(name, 1) 97 BTF_ID_LIST_GLOBAL(name, 1) \
98 BTF_ID(prefix, typename) 98 BTF_ID(prefix, typename)
99 99
100 /* 100 /*
101 * The BTF_ID_UNUSED macro defines 4 zero byte 101 * The BTF_ID_UNUSED macro defines 4 zero bytes.
102 * It's used when we want to define 'unused' e 102 * It's used when we want to define 'unused' entry
103 * in BTF_ID_LIST, like: 103 * in BTF_ID_LIST, like:
104 * 104 *
105 * BTF_ID_LIST(bpf_skb_output_btf_ids) 105 * BTF_ID_LIST(bpf_skb_output_btf_ids)
106 * BTF_ID(struct, sk_buff) 106 * BTF_ID(struct, sk_buff)
107 * BTF_ID_UNUSED 107 * BTF_ID_UNUSED
108 * BTF_ID(struct, task_struct) 108 * BTF_ID(struct, task_struct)
109 */ 109 */
110 110
111 #define BTF_ID_UNUSED 111 #define BTF_ID_UNUSED \
112 asm( 112 asm( \
113 ".pushsection " BTF_IDS_SECTION ",\"a\"; 113 ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \
114 ".zero 4 114 ".zero 4 \n" \
115 ".popsection; 115 ".popsection; \n");
116 116
117 /* 117 /*
118 * The BTF_SET_START/END macros pair defines s 118 * The BTF_SET_START/END macros pair defines sorted list of
119 * BTF IDs plus its members count, with follow 119 * BTF IDs plus its members count, with following layout:
120 * 120 *
121 * BTF_SET_START(list) 121 * BTF_SET_START(list)
122 * BTF_ID(type1, name1) 122 * BTF_ID(type1, name1)
123 * BTF_ID(type2, name2) 123 * BTF_ID(type2, name2)
124 * BTF_SET_END(list) 124 * BTF_SET_END(list)
125 * 125 *
126 * __BTF_ID__set__list: 126 * __BTF_ID__set__list:
127 * .zero 4 127 * .zero 4
128 * list: 128 * list:
129 * __BTF_ID__type1__name1__3: 129 * __BTF_ID__type1__name1__3:
130 * .zero 4 130 * .zero 4
131 * __BTF_ID__type2__name2__4: 131 * __BTF_ID__type2__name2__4:
132 * .zero 4 132 * .zero 4
133 * 133 *
134 */ 134 */
135 #define __BTF_SET_START(name, scope) 135 #define __BTF_SET_START(name, scope) \
136 asm( 136 asm( \
137 ".pushsection " BTF_IDS_SECTION ",\"a\"; 137 ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \
138 "." #scope " __BTF_ID__set__" #name "; 138 "." #scope " __BTF_ID__set__" #name "; \n" \
139 "__BTF_ID__set__" #name ":; 139 "__BTF_ID__set__" #name ":; \n" \
140 ".zero 4 140 ".zero 4 \n" \
141 ".popsection; 141 ".popsection; \n");
142 142
143 #define BTF_SET_START(name) 143 #define BTF_SET_START(name) \
144 __BTF_ID_LIST(name, local) 144 __BTF_ID_LIST(name, local) \
145 __BTF_SET_START(name, local) 145 __BTF_SET_START(name, local)
146 146
147 #define BTF_SET_START_GLOBAL(name) 147 #define BTF_SET_START_GLOBAL(name) \
148 __BTF_ID_LIST(name, globl) 148 __BTF_ID_LIST(name, globl) \
149 __BTF_SET_START(name, globl) 149 __BTF_SET_START(name, globl)
150 150
151 #define BTF_SET_END(name) 151 #define BTF_SET_END(name) \
152 asm( 152 asm( \
153 ".pushsection " BTF_IDS_SECTION ",\"a\"; 153 ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \
154 ".size __BTF_ID__set__" #name ", .-" #name " 154 ".size __BTF_ID__set__" #name ", .-" #name " \n" \
155 ".popsection; 155 ".popsection; \n"); \
156 extern struct btf_id_set name; 156 extern struct btf_id_set name;
157 157
158 #else 158 #else
159 159
160 #define BTF_ID_LIST(name) static u32 __maybe_u 160 #define BTF_ID_LIST(name) static u32 __maybe_unused name[5];
161 #define BTF_ID(prefix, name) 161 #define BTF_ID(prefix, name)
162 #define BTF_ID_UNUSED 162 #define BTF_ID_UNUSED
163 #define BTF_ID_LIST_GLOBAL(name, n) u32 __mayb 163 #define BTF_ID_LIST_GLOBAL(name, n) u32 __maybe_unused name[n];
164 #define BTF_ID_LIST_SINGLE(name, prefix, typen 164 #define BTF_ID_LIST_SINGLE(name, prefix, typename) static u32 __maybe_unused name[1];
165 #define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix 165 #define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix, typename) u32 __maybe_unused name[1];
166 #define BTF_SET_START(name) static struct btf_ 166 #define BTF_SET_START(name) static struct btf_id_set __maybe_unused name = { 0 };
167 #define BTF_SET_START_GLOBAL(name) static stru 167 #define BTF_SET_START_GLOBAL(name) static struct btf_id_set __maybe_unused name = { 0 };
168 #define BTF_SET_END(name) 168 #define BTF_SET_END(name)
169 169
170 #endif /* CONFIG_DEBUG_INFO_BTF */ 170 #endif /* CONFIG_DEBUG_INFO_BTF */
171 171
172 #ifdef CONFIG_NET 172 #ifdef CONFIG_NET
173 /* Define a list of socket types which can be 173 /* Define a list of socket types which can be the argument for
174 * skc_to_*_sock() helpers. All these sockets 174 * skc_to_*_sock() helpers. All these sockets should have
175 * sock_common as the first argument in its me 175 * sock_common as the first argument in its memory layout.
176 */ 176 */
177 #define BTF_SOCK_TYPE_xxx \ 177 #define BTF_SOCK_TYPE_xxx \
178 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET, inet 178 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET, inet_sock) \
179 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_CONN, 179 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_CONN, inet_connection_sock) \
180 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_REQ, 180 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_REQ, inet_request_sock) \
181 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_TW, i 181 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_TW, inet_timewait_sock) \
182 BTF_SOCK_TYPE(BTF_SOCK_TYPE_REQ, reque 182 BTF_SOCK_TYPE(BTF_SOCK_TYPE_REQ, request_sock) \
183 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK, sock 183 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK, sock) \
184 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK_COMMO 184 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK_COMMON, sock_common) \
185 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP, tcp_s 185 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP, tcp_sock) \
186 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_REQ, t 186 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_REQ, tcp_request_sock) \
187 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_TW, tc 187 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_TW, tcp_timewait_sock) \
188 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP6, tcp6 188 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP6, tcp6_sock) \
189 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP, udp_s 189 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP, udp_sock) \
190 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP6, udp6 190 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP6, udp6_sock) \
191 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UNIX, unix 191 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UNIX, unix_sock) \
192 BTF_SOCK_TYPE(BTF_SOCK_TYPE_MPTCP, mpt 192 BTF_SOCK_TYPE(BTF_SOCK_TYPE_MPTCP, mptcp_sock) \
193 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCKET, so 193 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCKET, socket)
194 194
195 enum { 195 enum {
196 #define BTF_SOCK_TYPE(name, str) name, 196 #define BTF_SOCK_TYPE(name, str) name,
197 BTF_SOCK_TYPE_xxx 197 BTF_SOCK_TYPE_xxx
198 #undef BTF_SOCK_TYPE 198 #undef BTF_SOCK_TYPE
199 MAX_BTF_SOCK_TYPE, 199 MAX_BTF_SOCK_TYPE,
200 }; 200 };
201 201
202 extern u32 btf_sock_ids[]; 202 extern u32 btf_sock_ids[];
203 #endif 203 #endif
204 204
205 #define BTF_TRACING_TYPE_xxx \ 205 #define BTF_TRACING_TYPE_xxx \
206 BTF_TRACING_TYPE(BTF_TRACING_TYPE_TASK 206 BTF_TRACING_TYPE(BTF_TRACING_TYPE_TASK, task_struct) \
207 BTF_TRACING_TYPE(BTF_TRACING_TYPE_FILE 207 BTF_TRACING_TYPE(BTF_TRACING_TYPE_FILE, file) \
208 BTF_TRACING_TYPE(BTF_TRACING_TYPE_VMA, 208 BTF_TRACING_TYPE(BTF_TRACING_TYPE_VMA, vm_area_struct)
209 209
210 enum { 210 enum {
211 #define BTF_TRACING_TYPE(name, type) name, 211 #define BTF_TRACING_TYPE(name, type) name,
212 BTF_TRACING_TYPE_xxx 212 BTF_TRACING_TYPE_xxx
213 #undef BTF_TRACING_TYPE 213 #undef BTF_TRACING_TYPE
214 MAX_BTF_TRACING_TYPE, 214 MAX_BTF_TRACING_TYPE,
215 }; 215 };
216 216
217 extern u32 btf_tracing_ids[]; 217 extern u32 btf_tracing_ids[];
218 218
219 #endif 219 #endif
220 220
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