1 /**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 *** To edit the content of this header, modify the corresponding 11 *** source file (e.g. under external/kernel-headers/original/) then 12 *** run bionic/libc/kernel/tools/update_all.py 13 *** 14 *** Any manual change here will be lost the next time this script will 15 *** be run. You've been warned! 16 *** 17 **************************************************************************** 18 ****************************************************************************/ 19 #ifndef _UAPI__LINUX_BTF_H__ 20 #define _UAPI__LINUX_BTF_H__ 21 #include <linux/types.h> 22 #define BTF_MAGIC 0xeB9F 23 #define BTF_VERSION 1 24 struct btf_header { 25 __u16 magic; 26 __u8 version; 27 __u8 flags; 28 __u32 hdr_len; 29 __u32 type_off; 30 __u32 type_len; 31 __u32 str_off; 32 __u32 str_len; 33 }; 34 #define BTF_MAX_TYPE 0x000fffff 35 #define BTF_MAX_NAME_OFFSET 0x00ffffff 36 #define BTF_MAX_VLEN 0xffff 37 struct btf_type { 38 __u32 name_off; 39 __u32 info; 40 union { 41 __u32 size; 42 __u32 type; 43 }; 44 }; 45 #define BTF_INFO_KIND(info) (((info) >> 24) & 0x1f) 46 #define BTF_INFO_VLEN(info) ((info) & 0xffff) 47 #define BTF_INFO_KFLAG(info) ((info) >> 31) 48 enum { 49 BTF_KIND_UNKN = 0, 50 BTF_KIND_INT = 1, 51 BTF_KIND_PTR = 2, 52 BTF_KIND_ARRAY = 3, 53 BTF_KIND_STRUCT = 4, 54 BTF_KIND_UNION = 5, 55 BTF_KIND_ENUM = 6, 56 BTF_KIND_FWD = 7, 57 BTF_KIND_TYPEDEF = 8, 58 BTF_KIND_VOLATILE = 9, 59 BTF_KIND_CONST = 10, 60 BTF_KIND_RESTRICT = 11, 61 BTF_KIND_FUNC = 12, 62 BTF_KIND_FUNC_PROTO = 13, 63 BTF_KIND_VAR = 14, 64 BTF_KIND_DATASEC = 15, 65 BTF_KIND_FLOAT = 16, 66 BTF_KIND_DECL_TAG = 17, 67 BTF_KIND_TYPE_TAG = 18, 68 NR_BTF_KINDS, 69 BTF_KIND_MAX = NR_BTF_KINDS - 1, 70 }; 71 #define BTF_INT_ENCODING(VAL) (((VAL) & 0x0f000000) >> 24) 72 #define BTF_INT_OFFSET(VAL) (((VAL) & 0x00ff0000) >> 16) 73 #define BTF_INT_BITS(VAL) ((VAL) & 0x000000ff) 74 #define BTF_INT_SIGNED (1 << 0) 75 #define BTF_INT_CHAR (1 << 1) 76 #define BTF_INT_BOOL (1 << 2) 77 struct btf_enum { 78 __u32 name_off; 79 __s32 val; 80 }; 81 struct btf_array { 82 __u32 type; 83 __u32 index_type; 84 __u32 nelems; 85 }; 86 struct btf_member { 87 __u32 name_off; 88 __u32 type; 89 __u32 offset; 90 }; 91 #define BTF_MEMBER_BITFIELD_SIZE(val) ((val) >> 24) 92 #define BTF_MEMBER_BIT_OFFSET(val) ((val) & 0xffffff) 93 struct btf_param { 94 __u32 name_off; 95 __u32 type; 96 }; 97 enum { 98 BTF_VAR_STATIC = 0, 99 BTF_VAR_GLOBAL_ALLOCATED = 1, 100 BTF_VAR_GLOBAL_EXTERN = 2, 101 }; 102 enum btf_func_linkage { 103 BTF_FUNC_STATIC = 0, 104 BTF_FUNC_GLOBAL = 1, 105 BTF_FUNC_EXTERN = 2, 106 }; 107 struct btf_var { 108 __u32 linkage; 109 }; 110 struct btf_var_secinfo { 111 __u32 type; 112 __u32 offset; 113 __u32 size; 114 }; 115 struct btf_decl_tag { 116 __s32 component_idx; 117 }; 118 #endif 119