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/* 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
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