tools/bpf: sync btf.h header from kernel to tools (128b343d) · Commits · 戴 / test

tools/include/uapi/linux/btf.h

+18 −2

Original line number	Diff line number	Diff line
		@@ -34,7 +34,9 @@ struct btf_type {
		* bits 0-15: vlen (e.g. # of struct's members)
		* bits 16-23: unused
		* bits 24-27: kind (e.g. int, ptr, array...etc)
		* bits 28-31: unused
		* bits 28-30: unused
		* bit 31: kind_flag, currently used by
		* struct, union and fwd
		*/
		__u32 info;
		/* "size" is used by INT, ENUM, STRUCT and UNION.
		@@ -52,6 +54,7 @@ struct btf_type {

		#define BTF_INFO_KIND(info) (((info) >> 24) & 0x0f)
		#define BTF_INFO_VLEN(info) ((info) & 0xffff)
		#define BTF_INFO_KFLAG(info) ((info) >> 31)

		#define BTF_KIND_UNKN 0 /* Unknown */
		#define BTF_KIND_INT 1 /* Integer */
		@@ -110,9 +113,22 @@ struct btf_array {
		struct btf_member {
		__u32 name_off;
		__u32 type;
		__u32 offset; /* offset in bits */
		/* If the type info kind_flag is set, the btf_member offset
		* contains both member bitfield size and bit offset. The
		* bitfield size is set for bitfield members. If the type
		* info kind_flag is not set, the offset contains only bit
		* offset.
		*/
		__u32 offset;
		};

		/* If the struct/union type info kind_flag is set, the
		* following two macros are used to access bitfield_size
		* and bit_offset from btf_member.offset.
		*/
		#define BTF_MEMBER_BITFIELD_SIZE(val) ((val) >> 24)
		#define BTF_MEMBER_BIT_OFFSET(val) ((val) & 0xffffff)

		/* BTF_KIND_FUNC_PROTO is followed by multiple "struct btf_param".
		* The exact number of btf_param is stored in the vlen (of the
		* info in "struct btf_type").