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187 lines
5.1 KiB
187 lines
5.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _LINUX_BTF_IDS_H |
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#define _LINUX_BTF_IDS_H |
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struct btf_id_set { |
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u32 cnt; |
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u32 ids[]; |
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}; |
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#ifdef CONFIG_DEBUG_INFO_BTF |
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#include <linux/compiler.h> /* for __PASTE */ |
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/* |
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* Following macros help to define lists of BTF IDs placed |
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* in .BTF_ids section. They are initially filled with zeros |
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* (during compilation) and resolved later during the |
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* linking phase by resolve_btfids tool. |
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* |
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* Any change in list layout must be reflected in resolve_btfids |
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* tool logic. |
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*/ |
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#define BTF_IDS_SECTION ".BTF_ids" |
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#define ____BTF_ID(symbol) \ |
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asm( \ |
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".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ |
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".local " #symbol " ; \n" \ |
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".type " #symbol ", STT_OBJECT; \n" \ |
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".size " #symbol ", 4; \n" \ |
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#symbol ": \n" \ |
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".zero 4 \n" \ |
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".popsection; \n"); |
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#define __BTF_ID(symbol) \ |
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____BTF_ID(symbol) |
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#define __ID(prefix) \ |
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__PASTE(prefix, __COUNTER__) |
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/* |
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* The BTF_ID defines unique symbol for each ID pointing |
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* to 4 zero bytes. |
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*/ |
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#define BTF_ID(prefix, name) \ |
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__BTF_ID(__ID(__BTF_ID__##prefix##__##name##__)) |
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/* |
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* The BTF_ID_LIST macro defines pure (unsorted) list |
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* of BTF IDs, with following layout: |
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* |
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* BTF_ID_LIST(list1) |
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* BTF_ID(type1, name1) |
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* BTF_ID(type2, name2) |
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* |
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* list1: |
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* __BTF_ID__type1__name1__1: |
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* .zero 4 |
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* __BTF_ID__type2__name2__2: |
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* .zero 4 |
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* |
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*/ |
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#define __BTF_ID_LIST(name, scope) \ |
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asm( \ |
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".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ |
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"." #scope " " #name "; \n" \ |
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#name ":; \n" \ |
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".popsection; \n"); |
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#define BTF_ID_LIST(name) \ |
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__BTF_ID_LIST(name, local) \ |
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extern u32 name[]; |
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#define BTF_ID_LIST_GLOBAL(name) \ |
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__BTF_ID_LIST(name, globl) |
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/* The BTF_ID_LIST_SINGLE macro defines a BTF_ID_LIST with |
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* a single entry. |
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*/ |
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#define BTF_ID_LIST_SINGLE(name, prefix, typename) \ |
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BTF_ID_LIST(name) \ |
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BTF_ID(prefix, typename) |
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/* |
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* The BTF_ID_UNUSED macro defines 4 zero bytes. |
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* It's used when we want to define 'unused' entry |
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* in BTF_ID_LIST, like: |
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* |
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* BTF_ID_LIST(bpf_skb_output_btf_ids) |
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* BTF_ID(struct, sk_buff) |
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* BTF_ID_UNUSED |
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* BTF_ID(struct, task_struct) |
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*/ |
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#define BTF_ID_UNUSED \ |
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asm( \ |
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".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ |
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".zero 4 \n" \ |
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".popsection; \n"); |
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/* |
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* The BTF_SET_START/END macros pair defines sorted list of |
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* BTF IDs plus its members count, with following layout: |
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* |
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* BTF_SET_START(list) |
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* BTF_ID(type1, name1) |
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* BTF_ID(type2, name2) |
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* BTF_SET_END(list) |
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* |
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* __BTF_ID__set__list: |
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* .zero 4 |
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* list: |
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* __BTF_ID__type1__name1__3: |
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* .zero 4 |
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* __BTF_ID__type2__name2__4: |
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* .zero 4 |
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* |
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*/ |
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#define __BTF_SET_START(name, scope) \ |
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asm( \ |
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".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ |
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"." #scope " __BTF_ID__set__" #name "; \n" \ |
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"__BTF_ID__set__" #name ":; \n" \ |
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".zero 4 \n" \ |
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".popsection; \n"); |
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#define BTF_SET_START(name) \ |
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__BTF_ID_LIST(name, local) \ |
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__BTF_SET_START(name, local) |
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#define BTF_SET_START_GLOBAL(name) \ |
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__BTF_ID_LIST(name, globl) \ |
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__BTF_SET_START(name, globl) |
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#define BTF_SET_END(name) \ |
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asm( \ |
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".pushsection " BTF_IDS_SECTION ",\"a\"; \n" \ |
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".size __BTF_ID__set__" #name ", .-" #name " \n" \ |
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".popsection; \n"); \ |
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extern struct btf_id_set name; |
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#else |
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#define BTF_ID_LIST(name) static u32 name[5]; |
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#define BTF_ID(prefix, name) |
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#define BTF_ID_UNUSED |
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#define BTF_ID_LIST_GLOBAL(name) u32 name[1]; |
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#define BTF_ID_LIST_SINGLE(name, prefix, typename) static u32 name[1]; |
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#define BTF_SET_START(name) static struct btf_id_set name = { 0 }; |
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#define BTF_SET_START_GLOBAL(name) static struct btf_id_set name = { 0 }; |
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#define BTF_SET_END(name) |
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#endif /* CONFIG_DEBUG_INFO_BTF */ |
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#ifdef CONFIG_NET |
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/* Define a list of socket types which can be the argument for |
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* skc_to_*_sock() helpers. All these sockets should have |
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* sock_common as the first argument in its memory layout. |
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*/ |
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#define BTF_SOCK_TYPE_xxx \ |
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BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET, inet_sock) \ |
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BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_CONN, inet_connection_sock) \ |
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BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_REQ, inet_request_sock) \ |
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BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_TW, inet_timewait_sock) \ |
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BTF_SOCK_TYPE(BTF_SOCK_TYPE_REQ, request_sock) \ |
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BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK, sock) \ |
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BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK_COMMON, sock_common) \ |
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BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP, tcp_sock) \ |
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BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_REQ, tcp_request_sock) \ |
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BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_TW, tcp_timewait_sock) \ |
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BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP6, tcp6_sock) \ |
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BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP, udp_sock) \ |
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BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP6, udp6_sock) |
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enum { |
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#define BTF_SOCK_TYPE(name, str) name, |
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BTF_SOCK_TYPE_xxx |
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#undef BTF_SOCK_TYPE |
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MAX_BTF_SOCK_TYPE, |
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}; |
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extern u32 btf_sock_ids[]; |
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#endif |
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#endif
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