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