| /* SPDX-License-Identifier: GPL-2.0 */ |
| |
| #ifndef _LINUX_BTF_IDS_H |
| #define _LINUX_BTF_IDS_H |
| |
| struct btf_id_set { |
| u32 cnt; |
| u32 ids[]; |
| }; |
| |
| #ifdef CONFIG_DEBUG_INFO_BTF |
| |
| #include <linux/compiler.h> /* for __PASTE */ |
| |
| /* |
| * 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 ".BTF_ids" |
| |
| #define ____BTF_ID(symbol) \ |
| asm( \ |
| ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ |
| ".local " #symbol " ; \n" \ |
| ".type " #symbol ", STT_OBJECT; \n" \ |
| ".size " #symbol ", 4; \n" \ |
| #symbol ": \n" \ |
| ".zero 4 \n" \ |
| ".popsection; \n"); |
| |
| #define __BTF_ID(symbol) \ |
| ____BTF_ID(symbol) |
| |
| #define __ID(prefix) \ |
| __PASTE(prefix, __COUNTER__) |
| |
| /* |
| * The BTF_ID defines unique symbol for each ID pointing |
| * to 4 zero bytes. |
| */ |
| #define BTF_ID(prefix, name) \ |
| __BTF_ID(__ID(__BTF_ID__##prefix##__##name##__)) |
| |
| /* |
| * 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(name, scope) \ |
| asm( \ |
| ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ |
| "." #scope " " #name "; \n" \ |
| #name ":; \n" \ |
| ".popsection; \n"); |
| |
| #define BTF_ID_LIST(name) \ |
| __BTF_ID_LIST(name, local) \ |
| extern u32 name[]; |
| |
| #define BTF_ID_LIST_GLOBAL(name) \ |
| __BTF_ID_LIST(name, globl) |
| |
| /* The BTF_ID_LIST_SINGLE macro defines a BTF_ID_LIST with |
| * a single entry. |
| */ |
| #define BTF_ID_LIST_SINGLE(name, prefix, typename) \ |
| BTF_ID_LIST(name) \ |
| BTF_ID(prefix, typename) |
| #define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix, typename) \ |
| BTF_ID_LIST_GLOBAL(name) \ |
| BTF_ID(prefix, typename) |
| |
| /* |
| * 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 \ |
| asm( \ |
| ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ |
| ".zero 4 \n" \ |
| ".popsection; \n"); |
| |
| /* |
| * 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(name, scope) \ |
| asm( \ |
| ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ |
| "." #scope " __BTF_ID__set__" #name "; \n" \ |
| "__BTF_ID__set__" #name ":; \n" \ |
| ".zero 4 \n" \ |
| ".popsection; \n"); |
| |
| #define BTF_SET_START(name) \ |
| __BTF_ID_LIST(name, local) \ |
| __BTF_SET_START(name, local) |
| |
| #define BTF_SET_START_GLOBAL(name) \ |
| __BTF_ID_LIST(name, globl) \ |
| __BTF_SET_START(name, globl) |
| |
| #define BTF_SET_END(name) \ |
| asm( \ |
| ".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ |
| ".size __BTF_ID__set__" #name ", .-" #name " \n" \ |
| ".popsection; \n"); \ |
| extern struct btf_id_set name; |
| |
| #else |
| |
| #define BTF_ID_LIST(name) static u32 name[5]; |
| #define BTF_ID(prefix, name) |
| #define BTF_ID_UNUSED |
| #define BTF_ID_LIST_GLOBAL(name) u32 name[1]; |
| #define BTF_ID_LIST_SINGLE(name, prefix, typename) static u32 name[1]; |
| #define BTF_ID_LIST_GLOBAL_SINGLE(name, prefix, typename) u32 name[1]; |
| #define BTF_SET_START(name) static struct btf_id_set name = { 0 }; |
| #define BTF_SET_START_GLOBAL(name) static struct btf_id_set name = { 0 }; |
| #define BTF_SET_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 \ |
| BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET, inet_sock) \ |
| BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_CONN, inet_connection_sock) \ |
| BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_REQ, inet_request_sock) \ |
| BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_TW, inet_timewait_sock) \ |
| BTF_SOCK_TYPE(BTF_SOCK_TYPE_REQ, request_sock) \ |
| BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK, sock) \ |
| BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK_COMMON, sock_common) \ |
| BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP, tcp_sock) \ |
| BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_REQ, tcp_request_sock) \ |
| BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_TW, tcp_timewait_sock) \ |
| BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP6, tcp6_sock) \ |
| BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP, udp_sock) \ |
| BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP6, udp6_sock) \ |
| BTF_SOCK_TYPE(BTF_SOCK_TYPE_UNIX, unix_sock) |
| |
| enum { |
| #define BTF_SOCK_TYPE(name, str) name, |
| BTF_SOCK_TYPE_xxx |
| #undef BTF_SOCK_TYPE |
| MAX_BTF_SOCK_TYPE, |
| }; |
| |
| extern u32 btf_sock_ids[]; |
| #endif |
| |
| extern u32 btf_task_struct_ids[]; |
| |
| #endif |