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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 13/* This flag implies BTF_SET8 holds kfunc(s) */14#define BTF_SET8_KFUNCS (1 << 0)15 16struct btf_id_set8 {17 u32 cnt;18 u32 flags;19 struct {20 u32 id;21 u32 flags;22 } pairs[];23};24 25#ifdef CONFIG_DEBUG_INFO_BTF26 27#include <linux/compiler.h> /* for __PASTE */28#include <linux/compiler_attributes.h> /* for __maybe_unused */29#include <linux/stringify.h>30 31/*32 * Following macros help to define lists of BTF IDs placed33 * in .BTF_ids section. They are initially filled with zeros34 * (during compilation) and resolved later during the35 * linking phase by resolve_btfids tool.36 *37 * Any change in list layout must be reflected in resolve_btfids38 * tool logic.39 */40 41#define BTF_IDS_SECTION ".BTF_ids"42 43#define ____BTF_ID(symbol, word) \44asm( \45".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \46".local " #symbol " ; \n" \47".type " #symbol ", STT_OBJECT; \n" \48".size " #symbol ", 4; \n" \49#symbol ": \n" \50".zero 4 \n" \51word \52".popsection; \n");53 54#define __BTF_ID(symbol, word) \55 ____BTF_ID(symbol, word)56 57#define __ID(prefix) \58 __PASTE(__PASTE(prefix, __COUNTER__), __LINE__)59 60/*61 * The BTF_ID defines unique symbol for each ID pointing62 * to 4 zero bytes.63 */64#define BTF_ID(prefix, name) \65 __BTF_ID(__ID(__BTF_ID__##prefix##__##name##__), "")66 67#define ____BTF_ID_FLAGS(prefix, name, flags) \68 __BTF_ID(__ID(__BTF_ID__##prefix##__##name##__), ".long " #flags "\n")69#define __BTF_ID_FLAGS(prefix, name, flags, ...) \70 ____BTF_ID_FLAGS(prefix, name, flags)71#define BTF_ID_FLAGS(prefix, name, ...) \72 __BTF_ID_FLAGS(prefix, name, ##__VA_ARGS__, 0)73 74/*75 * The BTF_ID_LIST macro defines pure (unsorted) list76 * of BTF IDs, with following layout:77 *78 * BTF_ID_LIST(list1)79 * BTF_ID(type1, name1)80 * BTF_ID(type2, name2)81 *82 * list1:83 * __BTF_ID__type1__name1__1:84 * .zero 485 * __BTF_ID__type2__name2__2:86 * .zero 487 *88 */89#define __BTF_ID_LIST(name, scope) \90asm( \91".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \92"." #scope " " #name "; \n" \93#name ":; \n" \94".popsection; \n");95 96#define BTF_ID_LIST(name) \97__BTF_ID_LIST(name, local) \98extern u32 name[];99 100#define BTF_ID_LIST_GLOBAL(name, n) \101__BTF_ID_LIST(name, globl)102 103/* The BTF_ID_LIST_SINGLE macro defines a BTF_ID_LIST with104 * a single entry.105 */106#define BTF_ID_LIST_SINGLE(name, prefix, typename) \107 BTF_ID_LIST(name) \108 BTF_ID(prefix, typename)109#define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix, typename) \110 BTF_ID_LIST_GLOBAL(name, 1) \111 BTF_ID(prefix, typename)112 113/*114 * The BTF_ID_UNUSED macro defines 4 zero bytes.115 * It's used when we want to define 'unused' entry116 * in BTF_ID_LIST, like:117 *118 * BTF_ID_LIST(bpf_skb_output_btf_ids)119 * BTF_ID(struct, sk_buff)120 * BTF_ID_UNUSED121 * BTF_ID(struct, task_struct)122 */123 124#define BTF_ID_UNUSED \125asm( \126".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \127".zero 4 \n" \128".popsection; \n");129 130/*131 * The BTF_SET_START/END macros pair defines sorted list of132 * BTF IDs plus its members count, with following layout:133 *134 * BTF_SET_START(list)135 * BTF_ID(type1, name1)136 * BTF_ID(type2, name2)137 * BTF_SET_END(list)138 *139 * __BTF_ID__set__list:140 * .zero 4141 * list:142 * __BTF_ID__type1__name1__3:143 * .zero 4144 * __BTF_ID__type2__name2__4:145 * .zero 4146 *147 */148#define __BTF_SET_START(name, scope) \149asm( \150".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \151"." #scope " __BTF_ID__set__" #name "; \n" \152"__BTF_ID__set__" #name ":; \n" \153".zero 4 \n" \154".popsection; \n");155 156#define BTF_SET_START(name) \157__BTF_ID_LIST(name, local) \158__BTF_SET_START(name, local)159 160#define BTF_SET_START_GLOBAL(name) \161__BTF_ID_LIST(name, globl) \162__BTF_SET_START(name, globl)163 164#define BTF_SET_END(name) \165asm( \166".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \167".size __BTF_ID__set__" #name ", .-" #name " \n" \168".popsection; \n"); \169extern struct btf_id_set name;170 171/*172 * The BTF_SET8_START/END macros pair defines sorted list of173 * BTF IDs and their flags plus its members count, with the174 * following layout:175 *176 * BTF_SET8_START(list)177 * BTF_ID_FLAGS(type1, name1, flags)178 * BTF_ID_FLAGS(type2, name2, flags)179 * BTF_SET8_END(list)180 *181 * __BTF_ID__set8__list:182 * .zero 8183 * list:184 * __BTF_ID__type1__name1__3:185 * .zero 4186 * .word (1 << 0) | (1 << 2)187 * __BTF_ID__type2__name2__5:188 * .zero 4189 * .word (1 << 3) | (1 << 1) | (1 << 2)190 *191 */192#define __BTF_SET8_START(name, scope, flags) \193__BTF_ID_LIST(name, local) \194asm( \195".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \196"." #scope " __BTF_ID__set8__" #name "; \n" \197"__BTF_ID__set8__" #name ":; \n" \198".zero 4 \n" \199".long " __stringify(flags) "\n" \200".popsection; \n");201 202#define BTF_SET8_START(name) \203__BTF_SET8_START(name, local, 0)204 205#define BTF_SET8_END(name) \206asm( \207".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \208".size __BTF_ID__set8__" #name ", .-" #name " \n" \209".popsection; \n"); \210extern struct btf_id_set8 name;211 212#define BTF_KFUNCS_START(name) \213__BTF_SET8_START(name, local, BTF_SET8_KFUNCS)214 215#define BTF_KFUNCS_END(name) \216BTF_SET8_END(name)217 218#else219 220#define BTF_ID_LIST(name) static u32 __maybe_unused name[64];221#define BTF_ID(prefix, name)222#define BTF_ID_FLAGS(prefix, name, ...)223#define BTF_ID_UNUSED224#define BTF_ID_LIST_GLOBAL(name, n) u32 __maybe_unused name[n];225#define BTF_ID_LIST_SINGLE(name, prefix, typename) static u32 __maybe_unused name[1];226#define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix, typename) u32 __maybe_unused name[1];227#define BTF_SET_START(name) static struct btf_id_set __maybe_unused name = { 0 };228#define BTF_SET_START_GLOBAL(name) static struct btf_id_set __maybe_unused name = { 0 };229#define BTF_SET_END(name)230#define BTF_SET8_START(name) static struct btf_id_set8 __maybe_unused name = { 0 };231#define BTF_SET8_END(name)232#define BTF_KFUNCS_START(name) static struct btf_id_set8 __maybe_unused name = { .flags = BTF_SET8_KFUNCS };233#define BTF_KFUNCS_END(name)234 235#endif /* CONFIG_DEBUG_INFO_BTF */236 237#ifdef CONFIG_NET238/* Define a list of socket types which can be the argument for239 * skc_to_*_sock() helpers. All these sockets should have240 * sock_common as the first argument in its memory layout.241 */242#define BTF_SOCK_TYPE_xxx \243 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET, inet_sock) \244 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_CONN, inet_connection_sock) \245 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_REQ, inet_request_sock) \246 BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_TW, inet_timewait_sock) \247 BTF_SOCK_TYPE(BTF_SOCK_TYPE_REQ, request_sock) \248 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK, sock) \249 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK_COMMON, sock_common) \250 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP, tcp_sock) \251 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_REQ, tcp_request_sock) \252 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_TW, tcp_timewait_sock) \253 BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP6, tcp6_sock) \254 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP, udp_sock) \255 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP6, udp6_sock) \256 BTF_SOCK_TYPE(BTF_SOCK_TYPE_UNIX, unix_sock) \257 BTF_SOCK_TYPE(BTF_SOCK_TYPE_MPTCP, mptcp_sock) \258 BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCKET, socket)259 260enum {261#define BTF_SOCK_TYPE(name, str) name,262BTF_SOCK_TYPE_xxx263#undef BTF_SOCK_TYPE264MAX_BTF_SOCK_TYPE,265};266 267extern u32 btf_sock_ids[];268#endif269 270#define BTF_TRACING_TYPE_xxx \271 BTF_TRACING_TYPE(BTF_TRACING_TYPE_TASK, task_struct) \272 BTF_TRACING_TYPE(BTF_TRACING_TYPE_FILE, file) \273 BTF_TRACING_TYPE(BTF_TRACING_TYPE_VMA, vm_area_struct)274 275enum {276#define BTF_TRACING_TYPE(name, type) name,277BTF_TRACING_TYPE_xxx278#undef BTF_TRACING_TYPE279MAX_BTF_TRACING_TYPE,280};281 282extern u32 btf_tracing_ids[];283extern u32 bpf_cgroup_btf_id[];284extern u32 bpf_local_storage_map_btf_id[];285extern u32 btf_bpf_map_id[];286 287#endif288