1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | |
3 | #ifndef _LINUX_BTF_IDS_H |
4 | #define _LINUX_BTF_IDS_H |
5 | |
6 | struct btf_id_set { |
7 | u32 cnt; |
8 | u32 ids[]; |
9 | }; |
10 | |
11 | struct btf_id_set8 { |
12 | u32 cnt; |
13 | u32 flags; |
14 | struct { |
15 | u32 id; |
16 | u32 flags; |
17 | } pairs[]; |
18 | }; |
19 | |
20 | #ifdef CONFIG_DEBUG_INFO_BTF |
21 | |
22 | #include <linux/compiler.h> /* for __PASTE */ |
23 | #include <linux/compiler_attributes.h> /* for __maybe_unused */ |
24 | |
25 | /* |
26 | * Following macros help to define lists of BTF IDs placed |
27 | * in .BTF_ids section. They are initially filled with zeros |
28 | * (during compilation) and resolved later during the |
29 | * linking phase by resolve_btfids tool. |
30 | * |
31 | * Any change in list layout must be reflected in resolve_btfids |
32 | * tool logic. |
33 | */ |
34 | |
35 | #define BTF_IDS_SECTION ".BTF_ids" |
36 | |
37 | #define ____BTF_ID(symbol, word) \ |
38 | asm( \ |
39 | ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ |
40 | ".local " #symbol " ; \n" \ |
41 | ".type " #symbol ", STT_OBJECT; \n" \ |
42 | ".size " #symbol ", 4; \n" \ |
43 | #symbol ": \n" \ |
44 | ".zero 4 \n" \ |
45 | word \ |
46 | ".popsection; \n"); |
47 | |
48 | #define __BTF_ID(symbol, word) \ |
49 | ____BTF_ID(symbol, word) |
50 | |
51 | #define __ID(prefix) \ |
52 | __PASTE(__PASTE(prefix, __COUNTER__), __LINE__) |
53 | |
54 | /* |
55 | * The BTF_ID defines unique symbol for each ID pointing |
56 | * to 4 zero bytes. |
57 | */ |
58 | #define BTF_ID(prefix, name) \ |
59 | __BTF_ID(__ID(__BTF_ID__##prefix##__##name##__), "") |
60 | |
61 | #define ____BTF_ID_FLAGS(prefix, name, flags) \ |
62 | __BTF_ID(__ID(__BTF_ID__##prefix##__##name##__), ".long " #flags "\n") |
63 | #define __BTF_ID_FLAGS(prefix, name, flags, ...) \ |
64 | ____BTF_ID_FLAGS(prefix, name, flags) |
65 | #define BTF_ID_FLAGS(prefix, name, ...) \ |
66 | __BTF_ID_FLAGS(prefix, name, ##__VA_ARGS__, 0) |
67 | |
68 | /* |
69 | * The BTF_ID_LIST macro defines pure (unsorted) list |
70 | * of BTF IDs, with following layout: |
71 | * |
72 | * BTF_ID_LIST(list1) |
73 | * BTF_ID(type1, name1) |
74 | * BTF_ID(type2, name2) |
75 | * |
76 | * list1: |
77 | * __BTF_ID__type1__name1__1: |
78 | * .zero 4 |
79 | * __BTF_ID__type2__name2__2: |
80 | * .zero 4 |
81 | * |
82 | */ |
83 | #define __BTF_ID_LIST(name, scope) \ |
84 | asm( \ |
85 | ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ |
86 | "." #scope " " #name "; \n" \ |
87 | #name ":; \n" \ |
88 | ".popsection; \n"); |
89 | |
90 | #define BTF_ID_LIST(name) \ |
91 | __BTF_ID_LIST(name, local) \ |
92 | extern u32 name[]; |
93 | |
94 | #define BTF_ID_LIST_GLOBAL(name, n) \ |
95 | __BTF_ID_LIST(name, globl) |
96 | |
97 | /* The BTF_ID_LIST_SINGLE macro defines a BTF_ID_LIST with |
98 | * a single entry. |
99 | */ |
100 | #define BTF_ID_LIST_SINGLE(name, prefix, typename) \ |
101 | BTF_ID_LIST(name) \ |
102 | BTF_ID(prefix, typename) |
103 | #define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix, typename) \ |
104 | BTF_ID_LIST_GLOBAL(name, 1) \ |
105 | BTF_ID(prefix, typename) |
106 | |
107 | /* |
108 | * The BTF_ID_UNUSED macro defines 4 zero bytes. |
109 | * It's used when we want to define 'unused' entry |
110 | * in BTF_ID_LIST, like: |
111 | * |
112 | * BTF_ID_LIST(bpf_skb_output_btf_ids) |
113 | * BTF_ID(struct, sk_buff) |
114 | * BTF_ID_UNUSED |
115 | * BTF_ID(struct, task_struct) |
116 | */ |
117 | |
118 | #define BTF_ID_UNUSED \ |
119 | asm( \ |
120 | ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ |
121 | ".zero 4 \n" \ |
122 | ".popsection; \n"); |
123 | |
124 | /* |
125 | * The BTF_SET_START/END macros pair defines sorted list of |
126 | * BTF IDs plus its members count, with following layout: |
127 | * |
128 | * BTF_SET_START(list) |
129 | * BTF_ID(type1, name1) |
130 | * BTF_ID(type2, name2) |
131 | * BTF_SET_END(list) |
132 | * |
133 | * __BTF_ID__set__list: |
134 | * .zero 4 |
135 | * list: |
136 | * __BTF_ID__type1__name1__3: |
137 | * .zero 4 |
138 | * __BTF_ID__type2__name2__4: |
139 | * .zero 4 |
140 | * |
141 | */ |
142 | #define __BTF_SET_START(name, scope) \ |
143 | asm( \ |
144 | ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ |
145 | "." #scope " __BTF_ID__set__" #name "; \n" \ |
146 | "__BTF_ID__set__" #name ":; \n" \ |
147 | ".zero 4 \n" \ |
148 | ".popsection; \n"); |
149 | |
150 | #define BTF_SET_START(name) \ |
151 | __BTF_ID_LIST(name, local) \ |
152 | __BTF_SET_START(name, local) |
153 | |
154 | #define BTF_SET_START_GLOBAL(name) \ |
155 | __BTF_ID_LIST(name, globl) \ |
156 | __BTF_SET_START(name, globl) |
157 | |
158 | #define BTF_SET_END(name) \ |
159 | asm( \ |
160 | ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ |
161 | ".size __BTF_ID__set__" #name ", .-" #name " \n" \ |
162 | ".popsection; \n"); \ |
163 | extern struct btf_id_set name; |
164 | |
165 | /* |
166 | * The BTF_SET8_START/END macros pair defines sorted list of |
167 | * BTF IDs and their flags plus its members count, with the |
168 | * following layout: |
169 | * |
170 | * BTF_SET8_START(list) |
171 | * BTF_ID_FLAGS(type1, name1, flags) |
172 | * BTF_ID_FLAGS(type2, name2, flags) |
173 | * BTF_SET8_END(list) |
174 | * |
175 | * __BTF_ID__set8__list: |
176 | * .zero 8 |
177 | * list: |
178 | * __BTF_ID__type1__name1__3: |
179 | * .zero 4 |
180 | * .word (1 << 0) | (1 << 2) |
181 | * __BTF_ID__type2__name2__5: |
182 | * .zero 4 |
183 | * .word (1 << 3) | (1 << 1) | (1 << 2) |
184 | * |
185 | */ |
186 | #define __BTF_SET8_START(name, scope) \ |
187 | asm( \ |
188 | ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ |
189 | "." #scope " __BTF_ID__set8__" #name "; \n" \ |
190 | "__BTF_ID__set8__" #name ":; \n" \ |
191 | ".zero 8 \n" \ |
192 | ".popsection; \n"); |
193 | |
194 | #define BTF_SET8_START(name) \ |
195 | __BTF_ID_LIST(name, local) \ |
196 | __BTF_SET8_START(name, local) |
197 | |
198 | #define BTF_SET8_END(name) \ |
199 | asm( \ |
200 | ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ |
201 | ".size __BTF_ID__set8__" #name ", .-" #name " \n" \ |
202 | ".popsection; \n"); \ |
203 | extern struct btf_id_set8 name; |
204 | |
205 | #else |
206 | |
207 | #define BTF_ID_LIST(name) static u32 __maybe_unused name[64]; |
208 | #define BTF_ID(prefix, name) |
209 | #define BTF_ID_FLAGS(prefix, name, ...) |
210 | #define BTF_ID_UNUSED |
211 | #define BTF_ID_LIST_GLOBAL(name, n) u32 __maybe_unused name[n]; |
212 | #define BTF_ID_LIST_SINGLE(name, prefix, typename) static u32 __maybe_unused name[1]; |
213 | #define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix, typename) u32 __maybe_unused name[1]; |
214 | #define BTF_SET_START(name) static struct btf_id_set __maybe_unused name = { 0 }; |
215 | #define BTF_SET_START_GLOBAL(name) static struct btf_id_set __maybe_unused name = { 0 }; |
216 | #define BTF_SET_END(name) |
217 | #define BTF_SET8_START(name) static struct btf_id_set8 __maybe_unused name = { 0 }; |
218 | #define BTF_SET8_END(name) |
219 | |
220 | #endif /* CONFIG_DEBUG_INFO_BTF */ |
221 | |
222 | #ifdef CONFIG_NET |
223 | /* Define a list of socket types which can be the argument for |
224 | * skc_to_*_sock() helpers. All these sockets should have |
225 | * sock_common as the first argument in its memory layout. |
226 | */ |
227 | #define BTF_SOCK_TYPE_xxx \ |
228 | BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET, inet_sock) \ |
229 | BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_CONN, inet_connection_sock) \ |
230 | BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_REQ, inet_request_sock) \ |
231 | BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_TW, inet_timewait_sock) \ |
232 | BTF_SOCK_TYPE(BTF_SOCK_TYPE_REQ, request_sock) \ |
233 | BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK, sock) \ |
234 | BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK_COMMON, sock_common) \ |
235 | BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP, tcp_sock) \ |
236 | BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_REQ, tcp_request_sock) \ |
237 | BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_TW, tcp_timewait_sock) \ |
238 | BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP6, tcp6_sock) \ |
239 | BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP, udp_sock) \ |
240 | BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP6, udp6_sock) \ |
241 | BTF_SOCK_TYPE(BTF_SOCK_TYPE_UNIX, unix_sock) \ |
242 | BTF_SOCK_TYPE(BTF_SOCK_TYPE_MPTCP, mptcp_sock) \ |
243 | BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCKET, socket) |
244 | |
245 | enum { |
246 | #define BTF_SOCK_TYPE(name, str) name, |
247 | BTF_SOCK_TYPE_xxx |
248 | #undef BTF_SOCK_TYPE |
249 | MAX_BTF_SOCK_TYPE, |
250 | }; |
251 | |
252 | extern u32 btf_sock_ids[]; |
253 | #endif |
254 | |
255 | #define BTF_TRACING_TYPE_xxx \ |
256 | BTF_TRACING_TYPE(BTF_TRACING_TYPE_TASK, task_struct) \ |
257 | BTF_TRACING_TYPE(BTF_TRACING_TYPE_FILE, file) \ |
258 | BTF_TRACING_TYPE(BTF_TRACING_TYPE_VMA, vm_area_struct) |
259 | |
260 | enum { |
261 | #define BTF_TRACING_TYPE(name, type) name, |
262 | BTF_TRACING_TYPE_xxx |
263 | #undef BTF_TRACING_TYPE |
264 | MAX_BTF_TRACING_TYPE, |
265 | }; |
266 | |
267 | extern u32 btf_tracing_ids[]; |
268 | extern u32 bpf_cgroup_btf_id[]; |
269 | extern u32 bpf_local_storage_map_btf_id[]; |
270 | extern u32 btf_bpf_map_id[]; |
271 | |
272 | #endif |
273 | |