/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_BTF_IDS_H #define _LINUX_BTF_IDS_H #include <linux/types.h> /* for u32 */ struct btf_id_set { … }; /* This flag implies BTF_SET8 holds kfunc(s) */ #define BTF_SET8_KFUNCS … struct btf_id_set8 { … }; #ifdef CONFIG_DEBUG_INFO_BTF #include <linux/compiler.h> /* for __PASTE */ #include <linux/compiler_attributes.h> /* for __maybe_unused */ #include <linux/stringify.h> /* * Following macros help to define lists of BTF IDs placed * in .BTF_ids section. They are initially filled with zeros * (during compilation) and resolved later during the * linking phase by resolve_btfids tool. * * Any change in list layout must be reflected in resolve_btfids * tool logic. */ #define BTF_IDS_SECTION … #define ____BTF_ID … #define __BTF_ID … #define __ID … /* * The BTF_ID defines unique symbol for each ID pointing * to 4 zero bytes. */ #define BTF_ID … #define ____BTF_ID_FLAGS … #define __BTF_ID_FLAGS … #define BTF_ID_FLAGS … /* * The BTF_ID_LIST macro defines pure (unsorted) list * of BTF IDs, with following layout: * * BTF_ID_LIST(list1) * BTF_ID(type1, name1) * BTF_ID(type2, name2) * * list1: * __BTF_ID__type1__name1__1: * .zero 4 * __BTF_ID__type2__name2__2: * .zero 4 * */ #define __BTF_ID_LIST … #define BTF_ID_LIST … #define BTF_ID_LIST_GLOBAL … /* The BTF_ID_LIST_SINGLE macro defines a BTF_ID_LIST with * a single entry. */ #define BTF_ID_LIST_SINGLE … #define BTF_ID_LIST_GLOBAL_SINGLE … /* * The BTF_ID_UNUSED macro defines 4 zero bytes. * It's used when we want to define 'unused' entry * in BTF_ID_LIST, like: * * BTF_ID_LIST(bpf_skb_output_btf_ids) * BTF_ID(struct, sk_buff) * BTF_ID_UNUSED * BTF_ID(struct, task_struct) */ #define BTF_ID_UNUSED … /* * The BTF_SET_START/END macros pair defines sorted list of * BTF IDs plus its members count, with following layout: * * BTF_SET_START(list) * BTF_ID(type1, name1) * BTF_ID(type2, name2) * BTF_SET_END(list) * * __BTF_ID__set__list: * .zero 4 * list: * __BTF_ID__type1__name1__3: * .zero 4 * __BTF_ID__type2__name2__4: * .zero 4 * */ #define __BTF_SET_START … #define BTF_SET_START … #define BTF_SET_START_GLOBAL … #define BTF_SET_END … /* * The BTF_SET8_START/END macros pair defines sorted list of * BTF IDs and their flags plus its members count, with the * following layout: * * BTF_SET8_START(list) * BTF_ID_FLAGS(type1, name1, flags) * BTF_ID_FLAGS(type2, name2, flags) * BTF_SET8_END(list) * * __BTF_ID__set8__list: * .zero 8 * list: * __BTF_ID__type1__name1__3: * .zero 4 * .word (1 << 0) | (1 << 2) * __BTF_ID__type2__name2__5: * .zero 4 * .word (1 << 3) | (1 << 1) | (1 << 2) * */ #define __BTF_SET8_START … #define BTF_SET8_START … #define BTF_SET8_END … #define BTF_KFUNCS_START … #define BTF_KFUNCS_END … #else #define BTF_ID_LIST(name) … #define BTF_ID(prefix, name) … #define BTF_ID_FLAGS(prefix, name, ...) … #define BTF_ID_UNUSED #define BTF_ID_LIST_GLOBAL(name, n) … #define BTF_ID_LIST_SINGLE(name, prefix, typename) … #define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix, typename) … #define BTF_SET_START(name) … #define BTF_SET_START_GLOBAL(name) … #define BTF_SET_END(name) … #define BTF_SET8_START(name) … #define BTF_SET8_END(name) … #define BTF_KFUNCS_START(name) … #define BTF_KFUNCS_END(name) … #endif /* CONFIG_DEBUG_INFO_BTF */ #ifdef CONFIG_NET /* Define a list of socket types which can be the argument for * skc_to_*_sock() helpers. All these sockets should have * sock_common as the first argument in its memory layout. */ #define BTF_SOCK_TYPE_xxx … enum { … }; extern u32 btf_sock_ids[]; #endif #define BTF_TRACING_TYPE_xxx … enum { … }; extern u32 btf_tracing_ids[]; extern u32 bpf_cgroup_btf_id[]; extern u32 bpf_local_storage_map_btf_id[]; extern u32 btf_bpf_map_id[]; #endif
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