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, n) \
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 85 #define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix, typename) \
97 BTF_ID_LIST_GLOBAL(name, 1) 86 BTF_ID_LIST_GLOBAL(name, 1) \
98 BTF_ID(prefix, typename) 87 BTF_ID(prefix, typename)
99 88
100 /* 89 /*
101 * The BTF_ID_UNUSED macro defines 4 zero byte 90 * The BTF_ID_UNUSED macro defines 4 zero bytes.
102 * It's used when we want to define 'unused' e 91 * It's used when we want to define 'unused' entry
103 * in BTF_ID_LIST, like: 92 * in BTF_ID_LIST, like:
104 * 93 *
105 * BTF_ID_LIST(bpf_skb_output_btf_ids) 94 * BTF_ID_LIST(bpf_skb_output_btf_ids)
106 * BTF_ID(struct, sk_buff) 95 * BTF_ID(struct, sk_buff)
107 * BTF_ID_UNUSED 96 * BTF_ID_UNUSED
108 * BTF_ID(struct, task_struct) 97 * BTF_ID(struct, task_struct)
109 */ 98 */
110 99
111 #define BTF_ID_UNUSED 100 #define BTF_ID_UNUSED \
112 asm( 101 asm( \
113 ".pushsection " BTF_IDS_SECTION ",\"a\"; 102 ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \
114 ".zero 4 103 ".zero 4 \n" \
115 ".popsection; 104 ".popsection; \n");
116 105
117 /* 106 /*
118 * The BTF_SET_START/END macros pair defines s 107 * The BTF_SET_START/END macros pair defines sorted list of
119 * BTF IDs plus its members count, with follow 108 * BTF IDs plus its members count, with following layout:
120 * 109 *
121 * BTF_SET_START(list) 110 * BTF_SET_START(list)
122 * BTF_ID(type1, name1) 111 * BTF_ID(type1, name1)
123 * BTF_ID(type2, name2) 112 * BTF_ID(type2, name2)
124 * BTF_SET_END(list) 113 * BTF_SET_END(list)
125 * 114 *
126 * __BTF_ID__set__list: 115 * __BTF_ID__set__list:
127 * .zero 4 116 * .zero 4
128 * list: 117 * list:
129 * __BTF_ID__type1__name1__3: 118 * __BTF_ID__type1__name1__3:
130 * .zero 4 119 * .zero 4
131 * __BTF_ID__type2__name2__4: 120 * __BTF_ID__type2__name2__4:
132 * .zero 4 121 * .zero 4
133 * 122 *
134 */ 123 */
135 #define __BTF_SET_START(name, scope) 124 #define __BTF_SET_START(name, scope) \
136 asm( 125 asm( \
137 ".pushsection " BTF_IDS_SECTION ",\"a\"; 126 ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \
138 "." #scope " __BTF_ID__set__" #name "; 127 "." #scope " __BTF_ID__set__" #name "; \n" \
139 "__BTF_ID__set__" #name ":; 128 "__BTF_ID__set__" #name ":; \n" \
140 ".zero 4 129 ".zero 4 \n" \
141 ".popsection; 130 ".popsection; \n");
142 131
143 #define BTF_SET_START(name) 132 #define BTF_SET_START(name) \
144 __BTF_ID_LIST(name, local) 133 __BTF_ID_LIST(name, local) \
145 __BTF_SET_START(name, local) 134 __BTF_SET_START(name, local)
146 135
147 #define BTF_SET_START_GLOBAL(name) 136 #define BTF_SET_START_GLOBAL(name) \
148 __BTF_ID_LIST(name, globl) 137 __BTF_ID_LIST(name, globl) \
149 __BTF_SET_START(name, globl) 138 __BTF_SET_START(name, globl)
150 139
151 #define BTF_SET_END(name) 140 #define BTF_SET_END(name) \
152 asm( 141 asm( \
153 ".pushsection " BTF_IDS_SECTION ",\"a\"; 142 ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \
154 ".size __BTF_ID__set__" #name ", .-" #name " 143 ".size __BTF_ID__set__" #name ", .-" #name " \n" \
155 ".popsection; 144 ".popsection; \n"); \
156 extern struct btf_id_set name; 145 extern struct btf_id_set name;
157 146
158 #else 147 #else
159 148
160 #define BTF_ID_LIST(name) static u32 __maybe_u 149 #define BTF_ID_LIST(name) static u32 __maybe_unused name[5];
161 #define BTF_ID(prefix, name) 150 #define BTF_ID(prefix, name)
162 #define BTF_ID_UNUSED 151 #define BTF_ID_UNUSED
163 #define BTF_ID_LIST_GLOBAL(name, n) u32 __mayb 152 #define BTF_ID_LIST_GLOBAL(name, n) u32 __maybe_unused name[n];
164 #define BTF_ID_LIST_SINGLE(name, prefix, typen 153 #define BTF_ID_LIST_SINGLE(name, prefix, typename) static u32 __maybe_unused name[1];
165 #define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix 154 #define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix, typename) u32 __maybe_unused name[1];
166 #define BTF_SET_START(name) static struct btf_ 155 #define BTF_SET_START(name) static struct btf_id_set __maybe_unused name = { 0 };
167 #define BTF_SET_START_GLOBAL(name) static stru 156 #define BTF_SET_START_GLOBAL(name) static struct btf_id_set __maybe_unused name = { 0 };
168 #define BTF_SET_END(name) 157 #define BTF_SET_END(name)
169 158
170 #endif /* CONFIG_DEBUG_INFO_BTF */ 159 #endif /* CONFIG_DEBUG_INFO_BTF */
171 160
172 #ifdef CONFIG_NET 161 #ifdef CONFIG_NET
173 /* Define a list of socket types which can be 162 /* Define a list of socket types which can be the argument for
174 * skc_to_*_sock() helpers. All these sockets 163 * skc_to_*_sock() helpers. All these sockets should have
175 * sock_common as the first argument in its me 164 * sock_common as the first argument in its memory layout.
176 */ 165 */
177 #define BTF_SOCK_TYPE_xxx \ 166 #define BTF_SOCK_TYPE_xxx \
178 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET, inet 167 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET, inet_sock) \
179 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_CONN, 168 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_CONN, inet_connection_sock) \
180 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_REQ, 169 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_REQ, inet_request_sock) \
181 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_TW, i 170 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_TW, inet_timewait_sock) \
182 BTF_SOCK_TYPE(BTF_SOCK_TYPE_REQ, reque 171 BTF_SOCK_TYPE(BTF_SOCK_TYPE_REQ, request_sock) \
183 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK, sock 172 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK, sock) \
184 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK_COMMO 173 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK_COMMON, sock_common) \
185 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP, tcp_s 174 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP, tcp_sock) \
186 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_REQ, t 175 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_REQ, tcp_request_sock) \
187 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_TW, tc 176 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_TW, tcp_timewait_sock) \
188 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP6, tcp6 177 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP6, tcp6_sock) \
189 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP, udp_s 178 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP, udp_sock) \
190 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP6, udp6 179 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP6, udp6_sock) \
191 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UNIX, unix 180 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UNIX, unix_sock) \
192 BTF_SOCK_TYPE(BTF_SOCK_TYPE_MPTCP, mpt 181 BTF_SOCK_TYPE(BTF_SOCK_TYPE_MPTCP, mptcp_sock) \
193 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCKET, so 182 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCKET, socket)
194 183
195 enum { 184 enum {
196 #define BTF_SOCK_TYPE(name, str) name, 185 #define BTF_SOCK_TYPE(name, str) name,
197 BTF_SOCK_TYPE_xxx 186 BTF_SOCK_TYPE_xxx
198 #undef BTF_SOCK_TYPE 187 #undef BTF_SOCK_TYPE
199 MAX_BTF_SOCK_TYPE, 188 MAX_BTF_SOCK_TYPE,
200 }; 189 };
201 190
202 extern u32 btf_sock_ids[]; 191 extern u32 btf_sock_ids[];
203 #endif 192 #endif
204 193
205 #define BTF_TRACING_TYPE_xxx \ 194 #define BTF_TRACING_TYPE_xxx \
206 BTF_TRACING_TYPE(BTF_TRACING_TYPE_TASK 195 BTF_TRACING_TYPE(BTF_TRACING_TYPE_TASK, task_struct) \
207 BTF_TRACING_TYPE(BTF_TRACING_TYPE_FILE 196 BTF_TRACING_TYPE(BTF_TRACING_TYPE_FILE, file) \
208 BTF_TRACING_TYPE(BTF_TRACING_TYPE_VMA, 197 BTF_TRACING_TYPE(BTF_TRACING_TYPE_VMA, vm_area_struct)
209 198
210 enum { 199 enum {
211 #define BTF_TRACING_TYPE(name, type) name, 200 #define BTF_TRACING_TYPE(name, type) name,
212 BTF_TRACING_TYPE_xxx 201 BTF_TRACING_TYPE_xxx
213 #undef BTF_TRACING_TYPE 202 #undef BTF_TRACING_TYPE
214 MAX_BTF_TRACING_TYPE, 203 MAX_BTF_TRACING_TYPE,
215 }; 204 };
216 205
217 extern u32 btf_tracing_ids[]; 206 extern u32 btf_tracing_ids[];
218 207
219 #endif 208 #endif
220 209
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