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1/* SPDX-License-Identifier: GPL-2.0 */2 3#ifndef _LINUX_BTF_IDS_H4#define _LINUX_BTF_IDS_H5 6#include <linux/types.h> /* for u32 */7 8struct btf_id_set {9 u32 cnt;10 u32 ids[];11};12 13struct 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_BTF23 24#include <linux/compiler.h> /* for __PASTE */25 26/*27 * Following macros help to define lists of BTF IDs placed28 * in .BTF_ids section. They are initially filled with zeros29 * (during compilation) and resolved later during the30 * linking phase by resolve_btfids tool.31 *32 * Any change in list layout must be reflected in resolve_btfids33 * tool logic.34 */35 36#define BTF_IDS_SECTION ".BTF_ids"37 38#define ____BTF_ID(symbol) \39asm( \40".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \41".local " #symbol " ; \n" \42".type " #symbol ", STT_OBJECT; \n" \43".size " #symbol ", 4; \n" \44#symbol ": \n" \45".zero 4 \n" \46".popsection; \n");47 48#define __BTF_ID(symbol) \49 ____BTF_ID(symbol)50 51#define __ID(prefix) \52 __PASTE(__PASTE(prefix, __COUNTER__), __LINE__)53 54/*55 * The BTF_ID defines unique symbol for each ID pointing56 * to 4 zero bytes.57 */58#define BTF_ID(prefix, name) \59 __BTF_ID(__ID(__BTF_ID__##prefix##__##name##__))60 61/*62 * The BTF_ID_LIST macro defines pure (unsorted) list63 * 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 472 * __BTF_ID__type2__name2__2:73 * .zero 474 *75 */76#define __BTF_ID_LIST(name, scope) \77asm( \78".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \79"." #scope " " #name "; \n" \80#name ":; \n" \81".popsection; \n");82 83#define BTF_ID_LIST(name) \84__BTF_ID_LIST(name, local) \85extern 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_ID_LIST with91 * a single entry.92 */93#define BTF_ID_LIST_SINGLE(name, prefix, typename) \94 BTF_ID_LIST(name) \95 BTF_ID(prefix, typename)96#define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix, typename) \97 BTF_ID_LIST_GLOBAL(name, 1) \98 BTF_ID(prefix, typename)99 100/*101 * The BTF_ID_UNUSED macro defines 4 zero bytes.102 * It's used when we want to define 'unused' entry103 * in BTF_ID_LIST, like:104 *105 * BTF_ID_LIST(bpf_skb_output_btf_ids)106 * BTF_ID(struct, sk_buff)107 * BTF_ID_UNUSED108 * BTF_ID(struct, task_struct)109 */110 111#define BTF_ID_UNUSED \112asm( \113".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \114".zero 4 \n" \115".popsection; \n");116 117/*118 * The BTF_SET_START/END macros pair defines sorted list of119 * BTF IDs plus its members count, with following layout: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 4128 * list:129 * __BTF_ID__type1__name1__3:130 * .zero 4131 * __BTF_ID__type2__name2__4:132 * .zero 4133 *134 */135#define __BTF_SET_START(name, scope) \136asm( \137".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \138"." #scope " __BTF_ID__set__" #name "; \n" \139"__BTF_ID__set__" #name ":; \n" \140".zero 4 \n" \141".popsection; \n");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) \152asm( \153".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \154".size __BTF_ID__set__" #name ", .-" #name " \n" \155".popsection; \n"); \156extern struct btf_id_set name;157 158#else159 160#define BTF_ID_LIST(name) static u32 __maybe_unused name[5];161#define BTF_ID(prefix, name)162#define BTF_ID_UNUSED163#define BTF_ID_LIST_GLOBAL(name, n) u32 __maybe_unused name[n];164#define BTF_ID_LIST_SINGLE(name, prefix, typename) static u32 __maybe_unused name[1];165#define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix, typename) u32 __maybe_unused name[1];166#define BTF_SET_START(name) static struct btf_id_set __maybe_unused name = { 0 };167#define BTF_SET_START_GLOBAL(name) static struct btf_id_set __maybe_unused name = { 0 };168#define BTF_SET_END(name)169 170#endif /* CONFIG_DEBUG_INFO_BTF */171 172#ifdef CONFIG_NET173/* Define a list of socket types which can be the argument for174 * skc_to_*_sock() helpers. All these sockets should have175 * sock_common as the first argument in its memory layout.176 */177#define BTF_SOCK_TYPE_xxx \178 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET, inet_sock) \179 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_CONN, inet_connection_sock) \180 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_REQ, inet_request_sock) \181 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_TW, inet_timewait_sock) \182 BTF_SOCK_TYPE(BTF_SOCK_TYPE_REQ, request_sock) \183 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK, sock) \184 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK_COMMON, sock_common) \185 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP, tcp_sock) \186 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_REQ, tcp_request_sock) \187 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_TW, tcp_timewait_sock) \188 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP6, tcp6_sock) \189 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP, udp_sock) \190 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP6, udp6_sock) \191 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UNIX, unix_sock) \192 BTF_SOCK_TYPE(BTF_SOCK_TYPE_MPTCP, mptcp_sock) \193 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCKET, socket)194 195enum {196#define BTF_SOCK_TYPE(name, str) name,197BTF_SOCK_TYPE_xxx198#undef BTF_SOCK_TYPE199MAX_BTF_SOCK_TYPE,200};201 202extern u32 btf_sock_ids[];203#endif204 205#define BTF_TRACING_TYPE_xxx \206 BTF_TRACING_TYPE(BTF_TRACING_TYPE_TASK, task_struct) \207 BTF_TRACING_TYPE(BTF_TRACING_TYPE_FILE, file) \208 BTF_TRACING_TYPE(BTF_TRACING_TYPE_VMA, vm_area_struct)209 210enum {211#define BTF_TRACING_TYPE(name, type) name,212BTF_TRACING_TYPE_xxx213#undef BTF_TRACING_TYPE214MAX_BTF_TRACING_TYPE,215};216 217extern u32 btf_tracing_ids[];218 219#endif220