Documentation/bpf/btf.rst

591    * BPF_OBJ_GET_INFO_BY_FD: btf, func_info, line_info
660 During prog_load, func_info and line_info can be passed to kernel with proper
672     __aligned_u64   line_info;      /* line info */
675 The func_info and line_info are an array of below, respectively.::
689 line_info_rec_size is the size of each line_info record. Passing the record
697 Below are requirements for line_info:
698   * the first insn in each func must have a line_info record pointing to it.
699   * the line_info insn_off is in strictly increasing order.
701 For line_info, the line number and column number are defined as below:
758 The .BTF.ext section encodes func_info, line_info and CO-RE relocations
784 contains func_info, line_info and core_relo sub-sections.
785 See :ref:`BPF_Prog_Load` for details about func_info and line_info
808 The line_info is organized as below.::
811      btf_ext_info_sec for section #1 /* line_info for section #1 */
812      btf_ext_info_sec for section #2 /* line_info for section #2 */
946 The following is an example showing how func_info and line_info can help prog
980 The following is an example of how line_info can help debugging verification